| 1 | What has changed in GDB? |
| 2 | (Organized release by release) |
| 3 | |
| 4 | *** Changes since GDB 9 |
| 5 | |
| 6 | * GDB now supports debuginfod, an HTTP server for distributing ELF/DWARF |
| 7 | debugging information as well as source code. |
| 8 | |
| 9 | When built with debuginfod, GDB can automatically query debuginfod |
| 10 | servers for the separate debug files and source code of the executable |
| 11 | being debugged. |
| 12 | |
| 13 | To build GDB with debuginfod, pass --with-debuginfod to configure (this |
| 14 | requires libdebuginfod, the debuginfod client library). |
| 15 | |
| 16 | debuginfod is distributed with elfutils, starting with version 0.178. |
| 17 | |
| 18 | You can get the latest version from https://sourceware.org/elfutils. |
| 19 | |
| 20 | * New features in the GDB remote stub, GDBserver |
| 21 | |
| 22 | ** GDBserver is now supported on RISC-V GNU/Linux. |
| 23 | |
| 24 | * Debugging MS-Windows processes now sets $_exitsignal when the |
| 25 | inferior is terminated by a signal, instead of setting $_exitcode. |
| 26 | |
| 27 | * Multithreaded symbol loading has now been enabled by default on systems |
| 28 | that support it (see entry for GDB 9, below), providing faster |
| 29 | performance for programs with many symbols. |
| 30 | |
| 31 | * The $_siginfo convenience variable now also works on Windows targets, |
| 32 | and will display the EXCEPTION_RECORD of the last handled exception. |
| 33 | |
| 34 | * TUI windows can now be arranged horizontally. |
| 35 | |
| 36 | * The command history filename can now be set to the empty string |
| 37 | either using 'set history filename' or by setting 'GDBHISTFILE=' in |
| 38 | the environment. The effect of setting this filename to the empty |
| 39 | string is that GDB will not try to load any previous command |
| 40 | history. |
| 41 | |
| 42 | * On Windows targets, it is now possible to debug 32-bit programs with a |
| 43 | 64-bit GDB. |
| 44 | |
| 45 | * New commands |
| 46 | |
| 47 | set exec-file-mismatch -- Set exec-file-mismatch handling (ask|warn|off). |
| 48 | show exec-file-mismatch -- Show exec-file-mismatch handling (ask|warn|off). |
| 49 | Set or show the option 'exec-file-mismatch'. When GDB attaches to |
| 50 | a running process and can determine the name of the executable file |
| 51 | the process runs, this new option indicates whether to detect mismatch |
| 52 | between the name of the current executable file loaded by GDB |
| 53 | and the name of the executable file used to start the process. |
| 54 | If 'ask', the default, display a warning and ask the user |
| 55 | whether to load the process executable file; if 'warn', just display |
| 56 | a warning; if 'off', don't attempt to detect a mismatch. |
| 57 | |
| 58 | tui new-layout NAME WINDOW WEIGHT [WINDOW WEIGHT]... |
| 59 | Define a new TUI layout, specifying its name and the windows that |
| 60 | will be displayed. |
| 61 | |
| 62 | * New targets |
| 63 | |
| 64 | GNU/Linux/RISC-V (gdbserver) riscv*-*-linux* |
| 65 | |
| 66 | * Python API |
| 67 | |
| 68 | ** gdb.register_window_type can be used to implement new TUI windows |
| 69 | in Python. |
| 70 | |
| 71 | *** Changes in GDB 9 |
| 72 | |
| 73 | * 'thread-exited' event is now available in the annotations interface. |
| 74 | |
| 75 | * New built-in convenience variables $_gdb_major and $_gdb_minor |
| 76 | provide the GDB version. They are handy for conditionally using |
| 77 | features available only in or since specific GDB versions, in |
| 78 | scripts that should work error-free with many different versions, |
| 79 | such as in system-wide init files. |
| 80 | |
| 81 | * New built-in convenience functions $_gdb_setting, $_gdb_setting_str, |
| 82 | $_gdb_maint_setting and $_gdb_maint_setting_str provide access to values |
| 83 | of the GDB settings and the GDB maintenance settings. They are handy |
| 84 | for changing the logic of user defined commands depending on the |
| 85 | current GDB settings. |
| 86 | |
| 87 | * GDB now supports Thread Local Storage (TLS) variables on several |
| 88 | FreeBSD architectures (amd64, i386, powerpc, riscv). Other |
| 89 | architectures require kernel changes. TLS is not yet supported for |
| 90 | amd64 and i386 process core dumps. |
| 91 | |
| 92 | * Support for Pointer Authentication (PAC) on AArch64 Linux. Return |
| 93 | addresses that required unmasking are shown in the backtrace with the |
| 94 | postfix [PAC]. |
| 95 | |
| 96 | * Two new convenience functions $_cimag and $_creal that extract the |
| 97 | imaginary and real parts respectively from complex numbers. |
| 98 | |
| 99 | * New built-in convenience variables $_shell_exitcode and $_shell_exitsignal |
| 100 | provide the exitcode or exit status of the shell commands launched by |
| 101 | GDB commands such as "shell", "pipe" and "make". |
| 102 | |
| 103 | * The command define-prefix can now define user defined prefix commands. |
| 104 | User defined commands can now be defined using these user defined prefix |
| 105 | commands. |
| 106 | |
| 107 | * Command names can now use the . character. |
| 108 | |
| 109 | * The RX port now supports XML target descriptions. |
| 110 | |
| 111 | * GDB now shows the Ada task names at more places, e.g. in task switching |
| 112 | messages. |
| 113 | |
| 114 | * GDB can now be compiled with Python 3 on Windows. |
| 115 | |
| 116 | * New convenience variable $_ada_exception holds the address of the |
| 117 | Ada exception being thrown. This is set by Ada-related catchpoints. |
| 118 | |
| 119 | * GDB can now place breakpoints on nested functions and subroutines in |
| 120 | Fortran code. The '::' operator can be used between parent and |
| 121 | child scopes when placing breakpoints, for example: |
| 122 | |
| 123 | (gdb) break outer_function::inner_function |
| 124 | |
| 125 | The 'outer_function::' prefix is only needed if 'inner_function' is |
| 126 | not visible in the current scope. |
| 127 | |
| 128 | * In addition to the system-wide gdbinit file, if configured with |
| 129 | --with-system-gdbinit-dir, GDB will now also load files in that directory |
| 130 | as system gdbinit files, unless the -nx or -n flag is provided. Files |
| 131 | with extensions .gdb, .py and .scm are supported as long as GDB was |
| 132 | compiled with support for that language. |
| 133 | |
| 134 | * GDB now supports multithreaded symbol loading for higher performance. |
| 135 | This feature is still in testing, so it is disabled by default. You |
| 136 | can turn it on using 'maint set worker-threads unlimited'. |
| 137 | |
| 138 | * Multi-target debugging support |
| 139 | |
| 140 | GDB now supports debugging multiple target connections |
| 141 | simultaneously. For example, you can now have each inferior |
| 142 | connected to different remote servers running in different machines, |
| 143 | or have one inferior debugging a local native process, an inferior |
| 144 | debugging a core dump, etc. |
| 145 | |
| 146 | This support is experimental and comes with some limitations -- you |
| 147 | can only resume multiple targets simultaneously if all targets |
| 148 | support non-stop mode, and all remote stubs or servers must support |
| 149 | the same set of remote protocol features exactly. See also "info |
| 150 | connections" and "add-inferior -no-connection" below, and "maint set |
| 151 | target-non-stop" in the user manual. |
| 152 | |
| 153 | * Python API |
| 154 | |
| 155 | ** The gdb.Value type has a new method 'format_string' which returns a |
| 156 | string representing the value. The formatting is controlled by the |
| 157 | optional keyword arguments: 'raw', 'pretty_arrays', 'pretty_structs', |
| 158 | 'array_indexes', 'symbols', 'unions', 'deref_refs', 'actual_objects', |
| 159 | 'static_members', 'max_elements', 'repeat_threshold', and 'format'. |
| 160 | |
| 161 | ** gdb.Type has a new property 'objfile' which returns the objfile the |
| 162 | type was defined in. |
| 163 | |
| 164 | ** The frame information printed by the python frame filtering code |
| 165 | is now consistent with what the 'backtrace' command prints when |
| 166 | there are no filters, or when the 'backtrace' '-no-filters' option |
| 167 | is given. |
| 168 | |
| 169 | ** The new function gdb.lookup_static_symbol can be used to look up |
| 170 | symbols with static linkage. |
| 171 | |
| 172 | ** The new function gdb.lookup_static_symbols can be used to look up |
| 173 | all static symbols with static linkage. |
| 174 | |
| 175 | ** gdb.Objfile has new methods 'lookup_global_symbol' and |
| 176 | 'lookup_static_symbol' to lookup a symbol from this objfile only. |
| 177 | |
| 178 | ** gdb.Block now supports the dictionary syntax for accessing symbols in |
| 179 | this block (e.g. block['local_variable']). |
| 180 | |
| 181 | * New commands |
| 182 | |
| 183 | | [COMMAND] | SHELL_COMMAND |
| 184 | | -d DELIM COMMAND DELIM SHELL_COMMAND |
| 185 | pipe [COMMAND] | SHELL_COMMAND |
| 186 | pipe -d DELIM COMMAND DELIM SHELL_COMMAND |
| 187 | Executes COMMAND and sends its output to SHELL_COMMAND. |
| 188 | With no COMMAND, repeat the last executed command |
| 189 | and send its output to SHELL_COMMAND. |
| 190 | |
| 191 | define-prefix COMMAND |
| 192 | Define or mark a command as a user-defined prefix command. |
| 193 | |
| 194 | with SETTING [VALUE] [-- COMMAND] |
| 195 | w SETTING [VALUE] [-- COMMAND] |
| 196 | Temporarily set SETTING, run COMMAND, and restore SETTING. |
| 197 | Usage: with SETTING -- COMMAND |
| 198 | With no COMMAND, repeats the last executed command. |
| 199 | SETTING is any GDB setting you can change with the "set" |
| 200 | subcommands. For example, 'with language c -- print someobj' |
| 201 | temporarily switches to the C language in order to print someobj. |
| 202 | Settings can be combined: 'w lang c -- w print elements unlimited -- |
| 203 | usercmd' switches to the C language and runs usercmd with no limit |
| 204 | of array elements to print. |
| 205 | |
| 206 | maint with SETTING [VALUE] [-- COMMAND] |
| 207 | Like "with", but works with "maintenance set" settings. |
| 208 | |
| 209 | set may-call-functions [on|off] |
| 210 | show may-call-functions |
| 211 | This controls whether GDB will attempt to call functions in |
| 212 | the program, such as with expressions in the print command. It |
| 213 | defaults to on. Calling functions in the program being debugged |
| 214 | can have undesired side effects. It is now possible to forbid |
| 215 | such function calls. If function calls are forbidden, GDB will throw |
| 216 | an error when a command (such as print expression) calls a function |
| 217 | in the program. |
| 218 | |
| 219 | set print finish [on|off] |
| 220 | show print finish |
| 221 | This controls whether the `finish' command will display the value |
| 222 | that is returned by the current function. When `off', the value is |
| 223 | still entered into the value history, but it is not printed. The |
| 224 | default is `on'. |
| 225 | |
| 226 | set print max-depth |
| 227 | show print max-depth |
| 228 | Allows deeply nested structures to be simplified when printing by |
| 229 | replacing deeply nested parts (beyond the max-depth) with ellipses. |
| 230 | The default max-depth is 20, but this can be set to unlimited to get |
| 231 | the old behavior back. |
| 232 | |
| 233 | set print raw-values [on|off] |
| 234 | show print raw-values |
| 235 | By default, GDB applies the enabled pretty printers when printing a |
| 236 | value. This allows to ignore the enabled pretty printers for a series |
| 237 | of commands. The default is 'off'. |
| 238 | |
| 239 | set logging debugredirect [on|off] |
| 240 | By default, GDB debug output will go to both the terminal and the logfile. |
| 241 | Set if you want debug output to go only to the log file. |
| 242 | |
| 243 | set style title foreground COLOR |
| 244 | set style title background COLOR |
| 245 | set style title intensity VALUE |
| 246 | Control the styling of titles. |
| 247 | |
| 248 | set style highlight foreground COLOR |
| 249 | set style highlight background COLOR |
| 250 | set style highlight intensity VALUE |
| 251 | Control the styling of highlightings. |
| 252 | |
| 253 | maint set worker-threads |
| 254 | maint show worker-threads |
| 255 | Control the number of worker threads that can be used by GDB. The |
| 256 | default is 0. "unlimited" lets GDB choose a number that is |
| 257 | reasonable. Currently worker threads are only used when demangling |
| 258 | the names of linker symbols. |
| 259 | |
| 260 | set style tui-border foreground COLOR |
| 261 | set style tui-border background COLOR |
| 262 | Control the styling of TUI borders. |
| 263 | |
| 264 | set style tui-active-border foreground COLOR |
| 265 | set style tui-active-border background COLOR |
| 266 | Control the styling of the active TUI border. |
| 267 | |
| 268 | maint set test-settings KIND |
| 269 | maint show test-settings KIND |
| 270 | A set of commands used by the testsuite for exercising the settings |
| 271 | infrastructure. |
| 272 | |
| 273 | maint set tui-resize-message [on|off] |
| 274 | maint show tui-resize-message |
| 275 | Control whether GDB prints a message each time the terminal is |
| 276 | resized when in TUI mode. This is primarily useful for testing the |
| 277 | TUI. |
| 278 | |
| 279 | set print frame-info [short-location|location|location-and-address |
| 280 | |source-and-location|source-line|auto] |
| 281 | show print frame-info |
| 282 | This controls what frame information is printed by the commands printing |
| 283 | a frame. This setting will e.g. influence the behaviour of 'backtrace', |
| 284 | 'frame', 'stepi'. The python frame filtering also respect this setting. |
| 285 | The 'backtrace' '-frame-info' option can override this global setting. |
| 286 | |
| 287 | set tui compact-source |
| 288 | show tui compact-source |
| 289 | |
| 290 | Enable the "compact" display mode for the TUI source window. The |
| 291 | compact display uses only as much space as is needed for the line |
| 292 | numbers in the current file, and only a single space to separate the |
| 293 | line numbers from the source. |
| 294 | |
| 295 | info modules [-q] [REGEXP] |
| 296 | Return a list of Fortran modules matching REGEXP, or all modules if |
| 297 | no REGEXP is given. |
| 298 | |
| 299 | info module functions [-q] [-m MODULE_REGEXP] [-t TYPE_REGEXP] [REGEXP] |
| 300 | Return a list of functions within all modules, grouped by module. |
| 301 | The list of functions can be restricted with the optional regular |
| 302 | expressions. MODULE_REGEXP matches against the module name, |
| 303 | TYPE_REGEXP matches against the function type signature, and REGEXP |
| 304 | matches against the function name. |
| 305 | |
| 306 | info module variables [-q] [-m MODULE_REGEXP] [-t TYPE_REGEXP] [REGEXP] |
| 307 | Return a list of variables within all modules, grouped by module. |
| 308 | The list of variables can be restricted with the optional regular |
| 309 | expressions. MODULE_REGEXP matches against the module name, |
| 310 | TYPE_REGEXP matches against the variable type, and REGEXP matches |
| 311 | against the variable name. |
| 312 | |
| 313 | set debug remote-packet-max-chars |
| 314 | show debug remote-packet-max-chars |
| 315 | Controls the number of characters to output in a remote packet when using |
| 316 | "set debug remote". |
| 317 | The default is 512 bytes. |
| 318 | |
| 319 | info connections |
| 320 | Lists the target connections currently in use. |
| 321 | |
| 322 | * Changed commands |
| 323 | |
| 324 | help |
| 325 | The "help" command uses the title style to enhance the |
| 326 | readibility of its output by styling the classes and |
| 327 | command names. |
| 328 | |
| 329 | apropos [-v] REGEXP |
| 330 | Similarly to "help", the "apropos" command also uses the |
| 331 | title style for the command names. "apropos" accepts now |
| 332 | a flag "-v" (verbose) to show the full documentation |
| 333 | of matching commands and to use the highlight style to mark |
| 334 | the documentation parts matching REGEXP. |
| 335 | |
| 336 | printf |
| 337 | eval |
| 338 | The GDB printf and eval commands can now print C-style and Ada-style |
| 339 | string convenience variables without calling functions in the program. |
| 340 | This allows to do formatted printing of strings without having |
| 341 | a running inferior, or when debugging a core dump. |
| 342 | |
| 343 | info sources [-dirname | -basename] [--] [REGEXP] |
| 344 | This command has now optional arguments to only print the files |
| 345 | whose names match REGEXP. The arguments -dirname and -basename |
| 346 | allow to restrict matching respectively to the dirname and basename |
| 347 | parts of the files. |
| 348 | |
| 349 | show style |
| 350 | The "show style" and its subcommands are now styling |
| 351 | a style name in their output using its own style, to help |
| 352 | the user visualize the different styles. |
| 353 | |
| 354 | set print frame-arguments |
| 355 | The new value 'presence' indicates to only indicate the presence of |
| 356 | arguments using ..., instead of printing argument names and values. |
| 357 | |
| 358 | set print raw-frame-arguments |
| 359 | show print raw-frame-arguments |
| 360 | |
| 361 | These commands replace the similarly-named "set/show print raw |
| 362 | frame-arguments" commands (now with a dash instead of a space). The |
| 363 | old commands are now deprecated and may be removed in a future |
| 364 | release. |
| 365 | |
| 366 | add-inferior [-no-connection] |
| 367 | The add-inferior command now supports a "-no-connection" flag that |
| 368 | makes the new inferior start with no target connection associated. |
| 369 | By default, the new inferior inherits the target connection of the |
| 370 | current inferior. See also "info connections". |
| 371 | |
| 372 | info inferior |
| 373 | This command's output now includes a new "Connection" column |
| 374 | indicating which target connection an inferior is bound to. See |
| 375 | "info connections" above. |
| 376 | |
| 377 | maint test-options require-delimiter |
| 378 | maint test-options unknown-is-error |
| 379 | maint test-options unknown-is-operand |
| 380 | maint show test-options-completion-result |
| 381 | Commands used by the testsuite to validate the command options |
| 382 | framework. |
| 383 | |
| 384 | focus, winheight, +, -, >, < |
| 385 | These commands are now case-sensitive. |
| 386 | |
| 387 | * New command options, command completion |
| 388 | |
| 389 | GDB now has a standard infrastructure to support dash-style command |
| 390 | options ('-OPT'). One benefit is that commands that use it can |
| 391 | easily support completion of command line arguments. Try "CMD |
| 392 | -[TAB]" or "help CMD" to find options supported by a command. Over |
| 393 | time, we intend to migrate most commands to this infrastructure. A |
| 394 | number of commands got support for new command options in this |
| 395 | release: |
| 396 | |
| 397 | ** The "print" and "compile print" commands now support a number of |
| 398 | options that allow overriding relevant global print settings as |
| 399 | set by "set print" subcommands: |
| 400 | |
| 401 | -address [on|off] |
| 402 | -array [on|off] |
| 403 | -array-indexes [on|off] |
| 404 | -elements NUMBER|unlimited |
| 405 | -null-stop [on|off] |
| 406 | -object [on|off] |
| 407 | -pretty [on|off] |
| 408 | -raw-values [on|off] |
| 409 | -repeats NUMBER|unlimited |
| 410 | -static-members [on|off] |
| 411 | -symbol [on|off] |
| 412 | -union [on|off] |
| 413 | -vtbl [on|off] |
| 414 | |
| 415 | Note that because the "print"/"compile print" commands accept |
| 416 | arbitrary expressions which may look like options (including |
| 417 | abbreviations), if you specify any command option, then you must |
| 418 | use a double dash ("--") to mark the end of argument processing. |
| 419 | |
| 420 | ** The "backtrace" command now supports a number of options that |
| 421 | allow overriding relevant global print settings as set by "set |
| 422 | backtrace" and "set print" subcommands: |
| 423 | |
| 424 | -entry-values no|only|preferred|if-needed|both|compact|default |
| 425 | -frame-arguments all|scalars|none |
| 426 | -raw-frame-arguments [on|off] |
| 427 | -frame-info auto|source-line|location|source-and-location |
| 428 | |location-and-address|short-location |
| 429 | -past-main [on|off] |
| 430 | -past-entry [on|off] |
| 431 | |
| 432 | In addition, the full/no-filters/hide qualifiers are now also |
| 433 | exposed as command options too: |
| 434 | |
| 435 | -full |
| 436 | -no-filters |
| 437 | -hide |
| 438 | |
| 439 | ** The "frame apply", "tfaas" and "faas" commands similarly now |
| 440 | support the following options: |
| 441 | |
| 442 | -past-main [on|off] |
| 443 | -past-entry [on|off] |
| 444 | |
| 445 | ** The new "info sources" options -dirname and -basename options |
| 446 | are using the standard '-OPT' infrastructure. |
| 447 | |
| 448 | All options above can also be abbreviated. The argument of boolean |
| 449 | (on/off) options can be 0/1 too, and also the argument is assumed |
| 450 | "on" if omitted. This allows writing compact command invocations, |
| 451 | like for example: |
| 452 | |
| 453 | (gdb) p -ra -p -o 0 -- *myptr |
| 454 | |
| 455 | The above is equivalent to: |
| 456 | |
| 457 | (gdb) print -raw-values -pretty -object off -- *myptr |
| 458 | |
| 459 | ** The "info types" command now supports the '-q' flag to disable |
| 460 | printing of some header information in a similar fashion to "info |
| 461 | variables" and "info functions". |
| 462 | |
| 463 | ** The "info variables", "info functions", and "whereis" commands |
| 464 | now take a '-n' flag that excludes non-debug symbols (symbols |
| 465 | from the symbol table, not from the debug info such as DWARF) |
| 466 | from the results. |
| 467 | |
| 468 | * Completion improvements |
| 469 | |
| 470 | ** GDB can now complete the options of the "thread apply all" and |
| 471 | "taas" commands, and their "-ascending" option can now be |
| 472 | abbreviated. |
| 473 | |
| 474 | ** GDB can now complete the options of the "info threads", "info |
| 475 | functions", "info variables", "info locals", and "info args" |
| 476 | commands. |
| 477 | |
| 478 | ** GDB can now complete the options of the "compile file" and |
| 479 | "compile code" commands. The "compile file" command now |
| 480 | completes on filenames. |
| 481 | |
| 482 | ** GDB can now complete the backtrace command's |
| 483 | "full/no-filters/hide" qualifiers. |
| 484 | |
| 485 | * In settings, you can now abbreviate "unlimited". |
| 486 | |
| 487 | E.g., "set print elements u" is now equivalent to "set print |
| 488 | elements unlimited". |
| 489 | |
| 490 | * New MI commands |
| 491 | |
| 492 | -complete |
| 493 | This lists all the possible completions for the rest of the line, if it |
| 494 | were to be given as a command itself. This is intended for use by MI |
| 495 | frontends in cases when separate CLI and MI channels cannot be used. |
| 496 | |
| 497 | -catch-throw, -catch-rethrow, and -catch-catch |
| 498 | These can be used to catch C++ exceptions in a similar fashion to |
| 499 | the CLI commands 'catch throw', 'catch rethrow', and 'catch catch'. |
| 500 | |
| 501 | -symbol-info-functions, -symbol-info-types, and -symbol-info-variables |
| 502 | These commands are the MI equivalent of the CLI commands 'info |
| 503 | functions', 'info types', and 'info variables' respectively. |
| 504 | |
| 505 | -symbol-info-modules, this is the MI equivalent of the CLI 'info |
| 506 | modules' command. |
| 507 | |
| 508 | -symbol-info-module-functions and -symbol-info-module-variables. |
| 509 | These commands are the MI equivalent of the CLI commands 'info |
| 510 | module functions' and 'info module variables'. |
| 511 | |
| 512 | * Other MI changes |
| 513 | |
| 514 | ** The default version of the MI interpreter is now 3 (-i=mi3). |
| 515 | |
| 516 | ** The output of information about multi-location breakpoints (which is |
| 517 | syntactically incorrect in MI 2) has changed in MI 3. This affects |
| 518 | the following commands and events: |
| 519 | |
| 520 | - -break-insert |
| 521 | - -break-info |
| 522 | - =breakpoint-created |
| 523 | - =breakpoint-modified |
| 524 | |
| 525 | The -fix-multi-location-breakpoint-output command can be used to enable |
| 526 | this behavior with previous MI versions. |
| 527 | |
| 528 | ** Backtraces and frames include a new optional field addr_flags which is |
| 529 | given after the addr field. On AArch64 this contains PAC if the address |
| 530 | has been masked in the frame. On all other targets the field is not |
| 531 | present. |
| 532 | |
| 533 | * Testsuite |
| 534 | |
| 535 | The testsuite now creates the files gdb.cmd (containing the arguments |
| 536 | used to launch GDB) and gdb.in (containing all the commands sent to |
| 537 | GDB) in the output directory for each test script. Multiple invocations |
| 538 | are appended with .1, .2, .3 etc. |
| 539 | |
| 540 | * Building GDB and GDBserver now requires GNU make >= 3.82. |
| 541 | |
| 542 | Using another implementation of the make program or an earlier version of |
| 543 | GNU make to build GDB or GDBserver is not supported. |
| 544 | |
| 545 | * Building GDB now requires GNU readline >= 7.0. |
| 546 | |
| 547 | GDB now bundles GNU readline 8.0, but if you choose to use |
| 548 | --with-system-readline, only readline >= 7.0 can be used. |
| 549 | |
| 550 | * The TUI SingleKey keymap is now named "SingleKey". This can be used |
| 551 | from .inputrc to bind keys in this keymap. This feature is only |
| 552 | available when gdb is built against GNU readline 8.0 or later. |
| 553 | |
| 554 | * Removed targets and native configurations |
| 555 | |
| 556 | GDB no longer supports debugging the Cell Broadband Engine. This includes |
| 557 | both debugging standalone Cell/B.E. SPU applications and integrated debugging |
| 558 | of Cell/B.E. applications that use both the PPU and SPU architectures. |
| 559 | |
| 560 | * New Simulators |
| 561 | |
| 562 | TI PRU pru-*-elf |
| 563 | |
| 564 | * Removed targets and native configurations |
| 565 | |
| 566 | Solaris 10 i?86-*-solaris2.10, x86_64-*-solaris2.10, |
| 567 | sparc*-*-solaris2.10 |
| 568 | |
| 569 | *** Changes in GDB 8.3 |
| 570 | |
| 571 | * GDB and GDBserver now support access to additional registers on |
| 572 | PowerPC GNU/Linux targets: PPR, DSCR, TAR, EBB/PMU registers, and |
| 573 | HTM registers. |
| 574 | |
| 575 | * GDB now has experimental support for the compilation and injection of |
| 576 | C++ source code into the inferior. This beta release does not include |
| 577 | support for several language features, such as templates, constructors, |
| 578 | and operators. |
| 579 | |
| 580 | This feature requires GCC 7.1 or higher built with libcp1.so |
| 581 | (the C++ plug-in). |
| 582 | |
| 583 | * GDB and GDBserver now support IPv6 connections. IPv6 addresses |
| 584 | can be passed using the '[ADDRESS]:PORT' notation, or the regular |
| 585 | 'ADDRESS:PORT' method. |
| 586 | |
| 587 | * DWARF index cache: GDB can now automatically save indices of DWARF |
| 588 | symbols on disk to speed up further loading of the same binaries. |
| 589 | |
| 590 | * Ada task switching is now supported on aarch64-elf targets when |
| 591 | debugging a program using the Ravenscar Profile. For more information, |
| 592 | see the "Tasking Support when using the Ravenscar Profile" section |
| 593 | in the GDB user manual. |
| 594 | |
| 595 | * GDB in batch mode now exits with status 1 if the last command to be |
| 596 | executed failed. |
| 597 | |
| 598 | * The RISC-V target now supports target descriptions. |
| 599 | |
| 600 | * System call catchpoints now support system call aliases on FreeBSD. |
| 601 | When the ABI of a system call changes in FreeBSD, this is |
| 602 | implemented by leaving a compatibility system call using the old ABI |
| 603 | at the existing number and allocating a new system call number for |
| 604 | the new ABI. For example, FreeBSD 12 altered the layout of 'struct |
| 605 | kevent' used by the 'kevent' system call. As a result, FreeBSD 12 |
| 606 | kernels ship with both 'kevent' and 'freebsd11_kevent' system calls. |
| 607 | The 'freebsd11_kevent' system call is assigned an alias of 'kevent' |
| 608 | so that a system call catchpoint for the 'kevent' system call will |
| 609 | catch invocations of both the 'kevent' and 'freebsd11_kevent' |
| 610 | binaries. This ensures that 'kevent' system calls are caught for |
| 611 | binaries using either the old or new ABIs. |
| 612 | |
| 613 | * Terminal styling is now available for the CLI and the TUI. GNU |
| 614 | Source Highlight can additionally be used to provide styling of |
| 615 | source code snippets. See the "set style" commands, below, for more |
| 616 | information. |
| 617 | |
| 618 | * Removed support for old demangling styles arm, edg, gnu, hp and |
| 619 | lucid. |
| 620 | |
| 621 | * New commands |
| 622 | |
| 623 | set debug compile-cplus-types |
| 624 | show debug compile-cplus-types |
| 625 | Control the display of debug output about type conversion in the |
| 626 | C++ compile feature. Commands have no effect while compiliong |
| 627 | for other languages. |
| 628 | |
| 629 | set debug skip |
| 630 | show debug skip |
| 631 | Control whether debug output about files/functions skipping is |
| 632 | displayed. |
| 633 | |
| 634 | frame apply [all | COUNT | -COUNT | level LEVEL...] [FLAG]... COMMAND |
| 635 | Apply a command to some frames. |
| 636 | FLAG arguments allow to control what output to produce and how to handle |
| 637 | errors raised when applying COMMAND to a frame. |
| 638 | |
| 639 | taas COMMAND |
| 640 | Apply a command to all threads (ignoring errors and empty output). |
| 641 | Shortcut for 'thread apply all -s COMMAND'. |
| 642 | |
| 643 | faas COMMAND |
| 644 | Apply a command to all frames (ignoring errors and empty output). |
| 645 | Shortcut for 'frame apply all -s COMMAND'. |
| 646 | |
| 647 | tfaas COMMAND |
| 648 | Apply a command to all frames of all threads (ignoring errors and empty |
| 649 | output). |
| 650 | Shortcut for 'thread apply all -s frame apply all -s COMMAND'. |
| 651 | |
| 652 | maint set dwarf unwinders (on|off) |
| 653 | maint show dwarf unwinders |
| 654 | Control whether DWARF unwinders can be used. |
| 655 | |
| 656 | info proc files |
| 657 | Display a list of open files for a process. |
| 658 | |
| 659 | * Changed commands |
| 660 | |
| 661 | Changes to the "frame", "select-frame", and "info frame" CLI commands. |
| 662 | These commands all now take a frame specification which |
| 663 | is either a frame level, or one of the keywords 'level', 'address', |
| 664 | 'function', or 'view' followed by a parameter. Selecting a frame by |
| 665 | address, or viewing a frame outside the current backtrace now |
| 666 | requires the use of a keyword. Selecting a frame by level is |
| 667 | unchanged. The MI comment "-stack-select-frame" is unchanged. |
| 668 | |
| 669 | target remote FILENAME |
| 670 | target extended-remote FILENAME |
| 671 | If FILENAME is a Unix domain socket, GDB will attempt to connect |
| 672 | to this socket instead of opening FILENAME as a character device. |
| 673 | |
| 674 | info args [-q] [-t TYPEREGEXP] [NAMEREGEXP] |
| 675 | info functions [-q] [-t TYPEREGEXP] [NAMEREGEXP] |
| 676 | info locals [-q] [-t TYPEREGEXP] [NAMEREGEXP] |
| 677 | info variables [-q] [-t TYPEREGEXP] [NAMEREGEXP] |
| 678 | These commands can now print only the searched entities |
| 679 | matching the provided regexp(s), giving a condition |
| 680 | on the entity names or entity types. The flag -q disables |
| 681 | printing headers or informations messages. |
| 682 | |
| 683 | info functions |
| 684 | info types |
| 685 | info variables |
| 686 | rbreak |
| 687 | These commands now determine the syntax for the shown entities |
| 688 | according to the language chosen by `set language'. In particular, |
| 689 | `set language auto' means to automatically choose the language of |
| 690 | the shown entities. |
| 691 | |
| 692 | thread apply [all | COUNT | -COUNT] [FLAG]... COMMAND |
| 693 | The 'thread apply' command accepts new FLAG arguments. |
| 694 | FLAG arguments allow to control what output to produce and how to handle |
| 695 | errors raised when applying COMMAND to a thread. |
| 696 | |
| 697 | set tui tab-width NCHARS |
| 698 | show tui tab-width NCHARS |
| 699 | "set tui tab-width" replaces the "tabset" command, which has been deprecated. |
| 700 | |
| 701 | set style enabled [on|off] |
| 702 | show style enabled |
| 703 | Enable or disable terminal styling. Styling is enabled by default |
| 704 | on most hosts, but disabled by default when in batch mode. |
| 705 | |
| 706 | set style sources [on|off] |
| 707 | show style sources |
| 708 | Enable or disable source code styling. Source code styling is |
| 709 | enabled by default, but only takes effect if styling in general is |
| 710 | enabled, and if GDB was linked with GNU Source Highlight. |
| 711 | |
| 712 | set style filename foreground COLOR |
| 713 | set style filename background COLOR |
| 714 | set style filename intensity VALUE |
| 715 | Control the styling of file names. |
| 716 | |
| 717 | set style function foreground COLOR |
| 718 | set style function background COLOR |
| 719 | set style function intensity VALUE |
| 720 | Control the styling of function names. |
| 721 | |
| 722 | set style variable foreground COLOR |
| 723 | set style variable background COLOR |
| 724 | set style variable intensity VALUE |
| 725 | Control the styling of variable names. |
| 726 | |
| 727 | set style address foreground COLOR |
| 728 | set style address background COLOR |
| 729 | set style address intensity VALUE |
| 730 | Control the styling of addresses. |
| 731 | |
| 732 | * MI changes |
| 733 | |
| 734 | ** The '-data-disassemble' MI command now accepts an '-a' option to |
| 735 | disassemble the whole function surrounding the given program |
| 736 | counter value or function name. Support for this feature can be |
| 737 | verified by using the "-list-features" command, which should |
| 738 | contain "data-disassemble-a-option". |
| 739 | |
| 740 | ** Command responses and notifications that include a frame now include |
| 741 | the frame's architecture in a new "arch" attribute. |
| 742 | |
| 743 | * New native configurations |
| 744 | |
| 745 | GNU/Linux/RISC-V riscv*-*-linux* |
| 746 | FreeBSD/riscv riscv*-*-freebsd* |
| 747 | |
| 748 | * New targets |
| 749 | |
| 750 | GNU/Linux/RISC-V riscv*-*-linux* |
| 751 | CSKY ELF csky*-*-elf |
| 752 | CSKY GNU/LINUX csky*-*-linux |
| 753 | FreeBSD/riscv riscv*-*-freebsd* |
| 754 | NXP S12Z s12z-*-elf |
| 755 | GNU/Linux/OpenRISC or1k*-*-linux* |
| 756 | |
| 757 | * Removed targets |
| 758 | |
| 759 | GDB no longer supports native debugging on versions of MS-Windows |
| 760 | before Windows XP. |
| 761 | |
| 762 | * Python API |
| 763 | |
| 764 | ** GDB no longer supports Python versions less than 2.6. |
| 765 | |
| 766 | ** The gdb.Inferior type has a new 'progspace' property, which is the program |
| 767 | space associated to that inferior. |
| 768 | |
| 769 | ** The gdb.Progspace type has a new 'objfiles' method, which returns the list |
| 770 | of objfiles associated to that program space. |
| 771 | |
| 772 | ** gdb.SYMBOL_LOC_COMMON_BLOCK, gdb.SYMBOL_MODULE_DOMAIN, and |
| 773 | gdb.SYMBOL_COMMON_BLOCK_DOMAIN were added to reflect changes to |
| 774 | the gdb core. |
| 775 | |
| 776 | ** gdb.SYMBOL_VARIABLES_DOMAIN, gdb.SYMBOL_FUNCTIONS_DOMAIN, and |
| 777 | gdb.SYMBOL_TYPES_DOMAIN are now deprecated. These were never |
| 778 | correct and did not work properly. |
| 779 | |
| 780 | ** The gdb.Value type has a new constructor, which is used to construct a |
| 781 | gdb.Value from a Python buffer object and a gdb.Type. |
| 782 | |
| 783 | * Configure changes |
| 784 | |
| 785 | --enable-ubsan |
| 786 | |
| 787 | Enable or disable the undefined behavior sanitizer. This is |
| 788 | disabled by default, but passing --enable-ubsan=yes or |
| 789 | --enable-ubsan=auto to configure will enable it. Enabling this can |
| 790 | cause a performance penalty. The undefined behavior sanitizer was |
| 791 | first introduced in GCC 4.9. |
| 792 | |
| 793 | *** Changes in GDB 8.2 |
| 794 | |
| 795 | * The 'set disassembler-options' command now supports specifying options |
| 796 | for the MIPS target. |
| 797 | |
| 798 | * The 'symbol-file' command now accepts an '-o' option to add a relative |
| 799 | offset to all sections. |
| 800 | |
| 801 | * Similarly, the 'add-symbol-file' command also accepts an '-o' option to add |
| 802 | a relative offset to all sections, but it allows to override the load |
| 803 | address of individual sections using '-s'. |
| 804 | |
| 805 | * The 'add-symbol-file' command no longer requires the second argument |
| 806 | (address of the text section). |
| 807 | |
| 808 | * The endianness used with the 'set endian auto' mode in the absence of |
| 809 | an executable selected for debugging is now the last endianness chosen |
| 810 | either by one of the 'set endian big' and 'set endian little' commands |
| 811 | or by inferring from the last executable used, rather than the startup |
| 812 | default. |
| 813 | |
| 814 | * The pager now allows a "c" response, meaning to disable the pager |
| 815 | for the rest of the current command. |
| 816 | |
| 817 | * The commands 'info variables/functions/types' now show the source line |
| 818 | numbers of symbol definitions when available. |
| 819 | |
| 820 | * 'info proc' now works on running processes on FreeBSD systems and core |
| 821 | files created on FreeBSD systems. |
| 822 | |
| 823 | * C expressions can now use _Alignof, and C++ expressions can now use |
| 824 | alignof. |
| 825 | |
| 826 | * Support for SVE on AArch64 Linux. Note that GDB does not detect changes to |
| 827 | the vector length while the process is running. |
| 828 | |
| 829 | * New commands |
| 830 | |
| 831 | set debug fbsd-nat |
| 832 | show debug fbsd-nat |
| 833 | Control display of debugging info regarding the FreeBSD native target. |
| 834 | |
| 835 | set|show varsize-limit |
| 836 | This new setting allows the user to control the maximum size of Ada |
| 837 | objects being printed when those objects have a variable type, |
| 838 | instead of that maximum size being hardcoded to 65536 bytes. |
| 839 | |
| 840 | set|show record btrace cpu |
| 841 | Controls the processor to be used for enabling errata workarounds for |
| 842 | branch trace decode. |
| 843 | |
| 844 | maint check libthread-db |
| 845 | Run integrity checks on the current inferior's thread debugging |
| 846 | library |
| 847 | |
| 848 | maint set check-libthread-db (on|off) |
| 849 | maint show check-libthread-db |
| 850 | Control whether to run integrity checks on inferior specific thread |
| 851 | debugging libraries as they are loaded. The default is not to |
| 852 | perform such checks. |
| 853 | |
| 854 | * Python API |
| 855 | |
| 856 | ** Type alignment is now exposed via the "align" attribute of a gdb.Type. |
| 857 | |
| 858 | ** The commands attached to a breakpoint can be set by assigning to |
| 859 | the breakpoint's "commands" field. |
| 860 | |
| 861 | ** gdb.execute can now execute multi-line gdb commands. |
| 862 | |
| 863 | ** The new functions gdb.convenience_variable and |
| 864 | gdb.set_convenience_variable can be used to get and set the value |
| 865 | of convenience variables. |
| 866 | |
| 867 | ** A gdb.Parameter will no longer print the "set" help text on an |
| 868 | ordinary "set"; instead by default a "set" will be silent unless |
| 869 | the get_set_string method returns a non-empty string. |
| 870 | |
| 871 | * New targets |
| 872 | |
| 873 | RiscV ELF riscv*-*-elf |
| 874 | |
| 875 | * Removed targets and native configurations |
| 876 | |
| 877 | m88k running OpenBSD m88*-*-openbsd* |
| 878 | SH-5/SH64 ELF sh64-*-elf*, SH-5/SH64 support in sh* |
| 879 | SH-5/SH64 running GNU/Linux SH-5/SH64 support in sh*-*-linux* |
| 880 | SH-5/SH64 running OpenBSD SH-5/SH64 support in sh*-*-openbsd* |
| 881 | |
| 882 | * Aarch64/Linux hardware watchpoints improvements |
| 883 | |
| 884 | Hardware watchpoints on unaligned addresses are now properly |
| 885 | supported when running Linux kernel 4.10 or higher: read and access |
| 886 | watchpoints are no longer spuriously missed, and all watchpoints |
| 887 | lengths between 1 and 8 bytes are supported. On older kernels, |
| 888 | watchpoints set on unaligned addresses are no longer missed, with |
| 889 | the tradeoff that there is a possibility of false hits being |
| 890 | reported. |
| 891 | |
| 892 | * Configure changes |
| 893 | |
| 894 | --enable-codesign=CERT |
| 895 | This can be used to invoke "codesign -s CERT" after building gdb. |
| 896 | This option is useful on macOS, where code signing is required for |
| 897 | gdb to work properly. |
| 898 | |
| 899 | --disable-gdbcli has been removed |
| 900 | This is now silently accepted, but does nothing. |
| 901 | |
| 902 | *** Changes in GDB 8.1 |
| 903 | |
| 904 | * GDB now supports dynamically creating arbitrary register groups specified |
| 905 | in XML target descriptions. This allows for finer grain grouping of |
| 906 | registers on systems with a large amount of registers. |
| 907 | |
| 908 | * The 'ptype' command now accepts a '/o' flag, which prints the |
| 909 | offsets and sizes of fields in a struct, like the pahole(1) tool. |
| 910 | |
| 911 | * New "--readnever" command line option instructs GDB to not read each |
| 912 | symbol file's symbolic debug information. This makes startup faster |
| 913 | but at the expense of not being able to perform symbolic debugging. |
| 914 | This option is intended for use cases where symbolic debugging will |
| 915 | not be used, e.g., when you only need to dump the debuggee's core. |
| 916 | |
| 917 | * GDB now uses the GNU MPFR library, if available, to emulate target |
| 918 | floating-point arithmetic during expression evaluation when the target |
| 919 | uses different floating-point formats than the host. At least version |
| 920 | 3.1 of GNU MPFR is required. |
| 921 | |
| 922 | * GDB now supports access to the guarded-storage-control registers and the |
| 923 | software-based guarded-storage broadcast control registers on IBM z14. |
| 924 | |
| 925 | * On Unix systems, GDB now supports transmitting environment variables |
| 926 | that are to be set or unset to GDBserver. These variables will |
| 927 | affect the environment to be passed to the remote inferior. |
| 928 | |
| 929 | To inform GDB of environment variables that are to be transmitted to |
| 930 | GDBserver, use the "set environment" command. Only user set |
| 931 | environment variables are sent to GDBserver. |
| 932 | |
| 933 | To inform GDB of environment variables that are to be unset before |
| 934 | the remote inferior is started by the GDBserver, use the "unset |
| 935 | environment" command. |
| 936 | |
| 937 | * Completion improvements |
| 938 | |
| 939 | ** GDB can now complete function parameters in linespecs and |
| 940 | explicit locations without quoting. When setting breakpoints, |
| 941 | quoting around functions names to help with TAB-completion is |
| 942 | generally no longer necessary. For example, this now completes |
| 943 | correctly: |
| 944 | |
| 945 | (gdb) b function(in[TAB] |
| 946 | (gdb) b function(int) |
| 947 | |
| 948 | Related, GDB is no longer confused with completing functions in |
| 949 | C++ anonymous namespaces: |
| 950 | |
| 951 | (gdb) b (anon[TAB] |
| 952 | (gdb) b (anonymous namespace)::[TAB][TAB] |
| 953 | (anonymous namespace)::a_function() |
| 954 | (anonymous namespace)::b_function() |
| 955 | |
| 956 | ** GDB now has much improved linespec and explicit locations TAB |
| 957 | completion support, that better understands what you're |
| 958 | completing and offers better suggestions. For example, GDB no |
| 959 | longer offers data symbols as possible completions when you're |
| 960 | setting a breakpoint. |
| 961 | |
| 962 | ** GDB now TAB-completes label symbol names. |
| 963 | |
| 964 | ** The "complete" command now mimics TAB completion accurately. |
| 965 | |
| 966 | * New command line options (gcore) |
| 967 | |
| 968 | -a |
| 969 | Dump all memory mappings. |
| 970 | |
| 971 | * Breakpoints on C++ functions are now set on all scopes by default |
| 972 | |
| 973 | By default, breakpoints on functions/methods are now interpreted as |
| 974 | specifying all functions with the given name ignoring missing |
| 975 | leading scopes (namespaces and classes). |
| 976 | |
| 977 | For example, assuming a C++ program with symbols named: |
| 978 | |
| 979 | A::B::func() |
| 980 | B::func() |
| 981 | |
| 982 | both commands "break func()" and "break B::func()" set a breakpoint |
| 983 | on both symbols. |
| 984 | |
| 985 | You can use the new flag "-qualified" to override this. This makes |
| 986 | GDB interpret the specified function name as a complete |
| 987 | fully-qualified name instead. For example, using the same C++ |
| 988 | program, the "break -q B::func" command sets a breakpoint on |
| 989 | "B::func", only. A parameter has been added to the Python |
| 990 | gdb.Breakpoint constructor to achieve the same result when creating |
| 991 | a breakpoint from Python. |
| 992 | |
| 993 | * Breakpoints on functions marked with C++ ABI tags |
| 994 | |
| 995 | GDB can now set breakpoints on functions marked with C++ ABI tags |
| 996 | (e.g., [abi:cxx11]). See here for a description of ABI tags: |
| 997 | https://developers.redhat.com/blog/2015/02/05/gcc5-and-the-c11-abi/ |
| 998 | |
| 999 | Functions with a C++11 abi tag are demangled/displayed like this: |
| 1000 | |
| 1001 | function[abi:cxx11](int) |
| 1002 | ^^^^^^^^^^^ |
| 1003 | |
| 1004 | You can now set a breakpoint on such functions simply as if they had |
| 1005 | no tag, like: |
| 1006 | |
| 1007 | (gdb) b function(int) |
| 1008 | |
| 1009 | Or if you need to disambiguate between tags, like: |
| 1010 | |
| 1011 | (gdb) b function[abi:other_tag](int) |
| 1012 | |
| 1013 | Tab completion was adjusted accordingly as well. |
| 1014 | |
| 1015 | * Python Scripting |
| 1016 | |
| 1017 | ** New events gdb.new_inferior, gdb.inferior_deleted, and |
| 1018 | gdb.new_thread are emitted. See the manual for further |
| 1019 | description of these. |
| 1020 | |
| 1021 | ** A new function, "gdb.rbreak" has been added to the Python API. |
| 1022 | This function allows the setting of a large number of breakpoints |
| 1023 | via a regex pattern in Python. See the manual for further details. |
| 1024 | |
| 1025 | ** Python breakpoints can now accept explicit locations. See the |
| 1026 | manual for a further description of this feature. |
| 1027 | |
| 1028 | |
| 1029 | * New features in the GDB remote stub, GDBserver |
| 1030 | |
| 1031 | ** GDBserver is now able to start inferior processes with a |
| 1032 | specified initial working directory. |
| 1033 | |
| 1034 | The user can set the desired working directory to be used from |
| 1035 | GDB using the new "set cwd" command. |
| 1036 | |
| 1037 | ** New "--selftest" command line option runs some GDBserver self |
| 1038 | tests. These self tests are disabled in releases. |
| 1039 | |
| 1040 | ** On Unix systems, GDBserver now does globbing expansion and variable |
| 1041 | substitution in inferior command line arguments. |
| 1042 | |
| 1043 | This is done by starting inferiors using a shell, like GDB does. |
| 1044 | See "set startup-with-shell" in the user manual for how to disable |
| 1045 | this from GDB when using "target extended-remote". When using |
| 1046 | "target remote", you can disable the startup with shell by using the |
| 1047 | new "--no-startup-with-shell" GDBserver command line option. |
| 1048 | |
| 1049 | ** On Unix systems, GDBserver now supports receiving environment |
| 1050 | variables that are to be set or unset from GDB. These variables |
| 1051 | will affect the environment to be passed to the inferior. |
| 1052 | |
| 1053 | * When catching an Ada exception raised with a message, GDB now prints |
| 1054 | the message in the catchpoint hit notification. In GDB/MI mode, that |
| 1055 | information is provided as an extra field named "exception-message" |
| 1056 | in the *stopped notification. |
| 1057 | |
| 1058 | * Trait objects can now be inspected When debugging Rust code. This |
| 1059 | requires compiler support which will appear in Rust 1.24. |
| 1060 | |
| 1061 | * New remote packets |
| 1062 | |
| 1063 | QEnvironmentHexEncoded |
| 1064 | Inform GDBserver of an environment variable that is to be passed to |
| 1065 | the inferior when starting it. |
| 1066 | |
| 1067 | QEnvironmentUnset |
| 1068 | Inform GDBserver of an environment variable that is to be unset |
| 1069 | before starting the remote inferior. |
| 1070 | |
| 1071 | QEnvironmentReset |
| 1072 | Inform GDBserver that the environment should be reset (i.e., |
| 1073 | user-set environment variables should be unset). |
| 1074 | |
| 1075 | QStartupWithShell |
| 1076 | Indicates whether the inferior must be started with a shell or not. |
| 1077 | |
| 1078 | QSetWorkingDir |
| 1079 | Tell GDBserver that the inferior to be started should use a specific |
| 1080 | working directory. |
| 1081 | |
| 1082 | * The "maintenance print c-tdesc" command now takes an optional |
| 1083 | argument which is the file name of XML target description. |
| 1084 | |
| 1085 | * The "maintenance selftest" command now takes an optional argument to |
| 1086 | filter the tests to be run. |
| 1087 | |
| 1088 | * The "enable", and "disable" commands now accept a range of |
| 1089 | breakpoint locations, e.g. "enable 1.3-5". |
| 1090 | |
| 1091 | * New commands |
| 1092 | |
| 1093 | set|show cwd |
| 1094 | Set and show the current working directory for the inferior. |
| 1095 | |
| 1096 | set|show compile-gcc |
| 1097 | Set and show compilation command used for compiling and injecting code |
| 1098 | with the 'compile' commands. |
| 1099 | |
| 1100 | set debug separate-debug-file |
| 1101 | show debug separate-debug-file |
| 1102 | Control the display of debug output about separate debug file search. |
| 1103 | |
| 1104 | set dump-excluded-mappings |
| 1105 | show dump-excluded-mappings |
| 1106 | Control whether mappings marked with the VM_DONTDUMP flag should be |
| 1107 | dumped when generating a core file. |
| 1108 | |
| 1109 | maint info selftests |
| 1110 | List the registered selftests. |
| 1111 | |
| 1112 | starti |
| 1113 | Start the debugged program stopping at the first instruction. |
| 1114 | |
| 1115 | set|show debug or1k |
| 1116 | Control display of debugging messages related to OpenRISC targets. |
| 1117 | |
| 1118 | set|show print type nested-type-limit |
| 1119 | Set and show the limit of nesting level for nested types that the |
| 1120 | type printer will show. |
| 1121 | |
| 1122 | * TUI Single-Key mode now supports two new shortcut keys: `i' for stepi and |
| 1123 | `o' for nexti. |
| 1124 | |
| 1125 | * Safer/improved support for debugging with no debug info |
| 1126 | |
| 1127 | GDB no longer assumes functions with no debug information return |
| 1128 | 'int'. |
| 1129 | |
| 1130 | This means that GDB now refuses to call such functions unless you |
| 1131 | tell it the function's type, by either casting the call to the |
| 1132 | declared return type, or by casting the function to a function |
| 1133 | pointer of the right type, and calling that: |
| 1134 | |
| 1135 | (gdb) p getenv ("PATH") |
| 1136 | 'getenv' has unknown return type; cast the call to its declared return type |
| 1137 | (gdb) p (char *) getenv ("PATH") |
| 1138 | $1 = 0x7fffffffe "/usr/local/bin:/"... |
| 1139 | (gdb) p ((char * (*) (const char *)) getenv) ("PATH") |
| 1140 | $2 = 0x7fffffffe "/usr/local/bin:/"... |
| 1141 | |
| 1142 | Similarly, GDB no longer assumes that global variables with no debug |
| 1143 | info have type 'int', and refuses to print the variable's value |
| 1144 | unless you tell it the variable's type: |
| 1145 | |
| 1146 | (gdb) p var |
| 1147 | 'var' has unknown type; cast it to its declared type |
| 1148 | (gdb) p (float) var |
| 1149 | $3 = 3.14 |
| 1150 | |
| 1151 | * New native configurations |
| 1152 | |
| 1153 | FreeBSD/aarch64 aarch64*-*-freebsd* |
| 1154 | FreeBSD/arm arm*-*-freebsd* |
| 1155 | |
| 1156 | * New targets |
| 1157 | |
| 1158 | FreeBSD/aarch64 aarch64*-*-freebsd* |
| 1159 | FreeBSD/arm arm*-*-freebsd* |
| 1160 | OpenRISC ELF or1k*-*-elf |
| 1161 | |
| 1162 | * Removed targets and native configurations |
| 1163 | |
| 1164 | Solaris 2.0-9 i?86-*-solaris2.[0-9], sparc*-*-solaris2.[0-9] |
| 1165 | |
| 1166 | *** Changes in GDB 8.0 |
| 1167 | |
| 1168 | * GDB now supports access to the PKU register on GNU/Linux. The register is |
| 1169 | added by the Memory Protection Keys for Userspace feature which will be |
| 1170 | available in future Intel CPUs. |
| 1171 | |
| 1172 | * GDB now supports C++11 rvalue references. |
| 1173 | |
| 1174 | * Python Scripting |
| 1175 | |
| 1176 | ** New functions to start, stop and access a running btrace recording. |
| 1177 | ** Rvalue references are now supported in gdb.Type. |
| 1178 | |
| 1179 | * GDB now supports recording and replaying rdrand and rdseed Intel 64 |
| 1180 | instructions. |
| 1181 | |
| 1182 | * Building GDB and GDBserver now requires a C++11 compiler. |
| 1183 | |
| 1184 | For example, GCC 4.8 or later. |
| 1185 | |
| 1186 | It is no longer possible to build GDB or GDBserver with a C |
| 1187 | compiler. The --disable-build-with-cxx configure option has been |
| 1188 | removed. |
| 1189 | |
| 1190 | * Building GDB and GDBserver now requires GNU make >= 3.81. |
| 1191 | |
| 1192 | It is no longer supported to build GDB or GDBserver with another |
| 1193 | implementation of the make program or an earlier version of GNU make. |
| 1194 | |
| 1195 | * Native debugging on MS-Windows supports command-line redirection |
| 1196 | |
| 1197 | Command-line arguments used for starting programs on MS-Windows can |
| 1198 | now include redirection symbols supported by native Windows shells, |
| 1199 | such as '<', '>', '>>', '2>&1', etc. This affects GDB commands such |
| 1200 | as "run", "start", and "set args", as well as the corresponding MI |
| 1201 | features. |
| 1202 | |
| 1203 | * Support for thread names on MS-Windows. |
| 1204 | |
| 1205 | GDB now catches and handles the special exception that programs |
| 1206 | running on MS-Windows use to assign names to threads in the |
| 1207 | debugger. |
| 1208 | |
| 1209 | * Support for Java programs compiled with gcj has been removed. |
| 1210 | |
| 1211 | * User commands now accept an unlimited number of arguments. |
| 1212 | Previously, only up to 10 was accepted. |
| 1213 | |
| 1214 | * The "eval" command now expands user-defined command arguments. |
| 1215 | |
| 1216 | This makes it easier to process a variable number of arguments: |
| 1217 | |
| 1218 | define mycommand |
| 1219 | set $i = 0 |
| 1220 | while $i < $argc |
| 1221 | eval "print $arg%d", $i |
| 1222 | set $i = $i + 1 |
| 1223 | end |
| 1224 | end |
| 1225 | |
| 1226 | * Target descriptions can now describe registers for sparc32 and sparc64. |
| 1227 | |
| 1228 | * GDB now supports DWARF version 5 (debug information format). |
| 1229 | Its .debug_names index is not yet supported. |
| 1230 | |
| 1231 | * New native configurations |
| 1232 | |
| 1233 | FreeBSD/mips mips*-*-freebsd |
| 1234 | |
| 1235 | * New targets |
| 1236 | |
| 1237 | Synopsys ARC arc*-*-elf32 |
| 1238 | FreeBSD/mips mips*-*-freebsd |
| 1239 | |
| 1240 | * Removed targets and native configurations |
| 1241 | |
| 1242 | Alpha running FreeBSD alpha*-*-freebsd* |
| 1243 | Alpha running GNU/kFreeBSD alpha*-*-kfreebsd*-gnu |
| 1244 | |
| 1245 | * New commands |
| 1246 | |
| 1247 | flash-erase |
| 1248 | Erases all the flash memory regions reported by the target. |
| 1249 | |
| 1250 | maint print arc arc-instruction address |
| 1251 | Print internal disassembler information about instruction at a given address. |
| 1252 | |
| 1253 | * New options |
| 1254 | |
| 1255 | set disassembler-options |
| 1256 | show disassembler-options |
| 1257 | Controls the passing of target specific information to the disassembler. |
| 1258 | If it is necessary to specify more than one disassembler option then |
| 1259 | multiple options can be placed together into a comma separated list. |
| 1260 | The default value is the empty string. Currently, the only supported |
| 1261 | targets are ARM, PowerPC and S/390. |
| 1262 | |
| 1263 | * New MI commands |
| 1264 | |
| 1265 | -target-flash-erase |
| 1266 | Erases all the flash memory regions reported by the target. This is |
| 1267 | equivalent to the CLI command flash-erase. |
| 1268 | |
| 1269 | -file-list-shared-libraries |
| 1270 | List the shared libraries in the program. This is |
| 1271 | equivalent to the CLI command "info shared". |
| 1272 | |
| 1273 | -catch-handlers |
| 1274 | Catchpoints stopping the program when Ada exceptions are |
| 1275 | handled. This is equivalent to the CLI command "catch handlers". |
| 1276 | |
| 1277 | *** Changes in GDB 7.12 |
| 1278 | |
| 1279 | * GDB and GDBserver now build with a C++ compiler by default. |
| 1280 | |
| 1281 | The --enable-build-with-cxx configure option is now enabled by |
| 1282 | default. One must now explicitly configure with |
| 1283 | --disable-build-with-cxx in order to build with a C compiler. This |
| 1284 | option will be removed in a future release. |
| 1285 | |
| 1286 | * GDBserver now supports recording btrace without maintaining an active |
| 1287 | GDB connection. |
| 1288 | |
| 1289 | * GDB now supports a negative repeat count in the 'x' command to examine |
| 1290 | memory backward from the given address. For example: |
| 1291 | |
| 1292 | (gdb) bt |
| 1293 | #0 Func1 (n=42, p=0x40061c "hogehoge") at main.cpp:4 |
| 1294 | #1 0x400580 in main (argc=1, argv=0x7fffffffe5c8) at main.cpp:8 |
| 1295 | (gdb) x/-5i 0x0000000000400580 |
| 1296 | 0x40056a <main(int, char**)+8>: mov %edi,-0x4(%rbp) |
| 1297 | 0x40056d <main(int, char**)+11>: mov %rsi,-0x10(%rbp) |
| 1298 | 0x400571 <main(int, char**)+15>: mov $0x40061c,%esi |
| 1299 | 0x400576 <main(int, char**)+20>: mov $0x2a,%edi |
| 1300 | 0x40057b <main(int, char**)+25>: |
| 1301 | callq 0x400536 <Func1(int, char const*)> |
| 1302 | |
| 1303 | * Fortran: Support structures with fields of dynamic types and |
| 1304 | arrays of dynamic types. |
| 1305 | |
| 1306 | * The symbol dumping maintenance commands have new syntax. |
| 1307 | maint print symbols [-pc address] [--] [filename] |
| 1308 | maint print symbols [-objfile objfile] [-source source] [--] [filename] |
| 1309 | maint print psymbols [-objfile objfile] [-pc address] [--] [filename] |
| 1310 | maint print psymbols [-objfile objfile] [-source source] [--] [filename] |
| 1311 | maint print msymbols [-objfile objfile] [--] [filename] |
| 1312 | |
| 1313 | * GDB now supports multibit bitfields and enums in target register |
| 1314 | descriptions. |
| 1315 | |
| 1316 | * New Python-based convenience function $_as_string(val), which returns |
| 1317 | the textual representation of a value. This function is especially |
| 1318 | useful to obtain the text label of an enum value. |
| 1319 | |
| 1320 | * Intel MPX bound violation handling. |
| 1321 | |
| 1322 | Segmentation faults caused by a Intel MPX boundary violation |
| 1323 | now display the kind of violation (upper or lower), the memory |
| 1324 | address accessed and the memory bounds, along with the usual |
| 1325 | signal received and code location. |
| 1326 | |
| 1327 | For example: |
| 1328 | |
| 1329 | Program received signal SIGSEGV, Segmentation fault |
| 1330 | Upper bound violation while accessing address 0x7fffffffc3b3 |
| 1331 | Bounds: [lower = 0x7fffffffc390, upper = 0x7fffffffc3a3] |
| 1332 | 0x0000000000400d7c in upper () at i386-mpx-sigsegv.c:68 |
| 1333 | |
| 1334 | * Rust language support. |
| 1335 | GDB now supports debugging programs written in the Rust programming |
| 1336 | language. See https://www.rust-lang.org/ for more information about |
| 1337 | Rust. |
| 1338 | |
| 1339 | * Support for running interpreters on specified input/output devices |
| 1340 | |
| 1341 | GDB now supports a new mechanism that allows frontends to provide |
| 1342 | fully featured GDB console views, as a better alternative to |
| 1343 | building such views on top of the "-interpreter-exec console" |
| 1344 | command. See the new "new-ui" command below. With that command, |
| 1345 | frontends can now start GDB in the traditional command-line mode |
| 1346 | running in an embedded terminal emulator widget, and create a |
| 1347 | separate MI interpreter running on a specified i/o device. In this |
| 1348 | way, GDB handles line editing, history, tab completion, etc. in the |
| 1349 | console all by itself, and the GUI uses the separate MI interpreter |
| 1350 | for its own control and synchronization, invisible to the command |
| 1351 | line. |
| 1352 | |
| 1353 | * The "catch syscall" command catches groups of related syscalls. |
| 1354 | |
| 1355 | The "catch syscall" command now supports catching a group of related |
| 1356 | syscalls using the 'group:' or 'g:' prefix. |
| 1357 | |
| 1358 | * New commands |
| 1359 | |
| 1360 | skip -file file |
| 1361 | skip -gfile file-glob-pattern |
| 1362 | skip -function function |
| 1363 | skip -rfunction regular-expression |
| 1364 | A generalized form of the skip command, with new support for |
| 1365 | glob-style file names and regular expressions for function names. |
| 1366 | Additionally, a file spec and a function spec may now be combined. |
| 1367 | |
| 1368 | maint info line-table REGEXP |
| 1369 | Display the contents of GDB's internal line table data struture. |
| 1370 | |
| 1371 | maint selftest |
| 1372 | Run any GDB unit tests that were compiled in. |
| 1373 | |
| 1374 | new-ui INTERP TTY |
| 1375 | Start a new user interface instance running INTERP as interpreter, |
| 1376 | using the TTY file for input/output. |
| 1377 | |
| 1378 | * Python Scripting |
| 1379 | |
| 1380 | ** gdb.Breakpoint objects have a new attribute "pending", which |
| 1381 | indicates whether the breakpoint is pending. |
| 1382 | ** Three new breakpoint-related events have been added: |
| 1383 | gdb.breakpoint_created, gdb.breakpoint_modified, and |
| 1384 | gdb.breakpoint_deleted. |
| 1385 | |
| 1386 | signal-event EVENTID |
| 1387 | Signal ("set") the given MS-Windows event object. This is used in |
| 1388 | conjunction with the Windows JIT debugging (AeDebug) support, where |
| 1389 | the OS suspends a crashing process until a debugger can attach to |
| 1390 | it. Resuming the crashing process, in order to debug it, is done by |
| 1391 | signalling an event. |
| 1392 | |
| 1393 | * Support for tracepoints and fast tracepoints on s390-linux and s390x-linux |
| 1394 | was added in GDBserver, including JIT compiling fast tracepoint's |
| 1395 | conditional expression bytecode into native code. |
| 1396 | |
| 1397 | * Support for various remote target protocols and ROM monitors has |
| 1398 | been removed: |
| 1399 | |
| 1400 | target m32rsdi Remote M32R debugging over SDI |
| 1401 | target mips MIPS remote debugging protocol |
| 1402 | target pmon PMON ROM monitor |
| 1403 | target ddb NEC's DDB variant of PMON for Vr4300 |
| 1404 | target rockhopper NEC RockHopper variant of PMON |
| 1405 | target lsi LSI variant of PMO |
| 1406 | |
| 1407 | * Support for tracepoints and fast tracepoints on powerpc-linux, |
| 1408 | powerpc64-linux, and powerpc64le-linux was added in GDBserver, |
| 1409 | including JIT compiling fast tracepoint's conditional expression |
| 1410 | bytecode into native code. |
| 1411 | |
| 1412 | * MI async record =record-started now includes the method and format used for |
| 1413 | recording. For example: |
| 1414 | |
| 1415 | =record-started,thread-group="i1",method="btrace",format="bts" |
| 1416 | |
| 1417 | * MI async record =thread-selected now includes the frame field. For example: |
| 1418 | |
| 1419 | =thread-selected,id="3",frame={level="0",addr="0x00000000004007c0"} |
| 1420 | |
| 1421 | * New targets |
| 1422 | |
| 1423 | Andes NDS32 nds32*-*-elf |
| 1424 | |
| 1425 | *** Changes in GDB 7.11 |
| 1426 | |
| 1427 | * GDB now supports debugging kernel-based threads on FreeBSD. |
| 1428 | |
| 1429 | * Per-inferior thread numbers |
| 1430 | |
| 1431 | Thread numbers are now per inferior instead of global. If you're |
| 1432 | debugging multiple inferiors, GDB displays thread IDs using a |
| 1433 | qualified INF_NUM.THR_NUM form. For example: |
| 1434 | |
| 1435 | (gdb) info threads |
| 1436 | Id Target Id Frame |
| 1437 | 1.1 Thread 0x7ffff7fc2740 (LWP 8155) (running) |
| 1438 | 1.2 Thread 0x7ffff7fc1700 (LWP 8168) (running) |
| 1439 | * 2.1 Thread 0x7ffff7fc2740 (LWP 8157) (running) |
| 1440 | 2.2 Thread 0x7ffff7fc1700 (LWP 8190) (running) |
| 1441 | |
| 1442 | As consequence, thread numbers as visible in the $_thread |
| 1443 | convenience variable and in Python's InferiorThread.num attribute |
| 1444 | are no longer unique between inferiors. |
| 1445 | |
| 1446 | GDB now maintains a second thread ID per thread, referred to as the |
| 1447 | global thread ID, which is the new equivalent of thread numbers in |
| 1448 | previous releases. See also $_gthread below. |
| 1449 | |
| 1450 | For backwards compatibility, MI's thread IDs always refer to global |
| 1451 | IDs. |
| 1452 | |
| 1453 | * Commands that accept thread IDs now accept the qualified |
| 1454 | INF_NUM.THR_NUM form as well. For example: |
| 1455 | |
| 1456 | (gdb) thread 2.1 |
| 1457 | [Switching to thread 2.1 (Thread 0x7ffff7fc2740 (LWP 8157))] (running) |
| 1458 | (gdb) |
| 1459 | |
| 1460 | * In commands that accept a list of thread IDs, you can now refer to |
| 1461 | all threads of an inferior using a star wildcard. GDB accepts |
| 1462 | "INF_NUM.*", to refer to all threads of inferior INF_NUM, and "*" to |
| 1463 | refer to all threads of the current inferior. For example, "info |
| 1464 | threads 2.*". |
| 1465 | |
| 1466 | * You can use "info threads -gid" to display the global thread ID of |
| 1467 | all threads. |
| 1468 | |
| 1469 | * The new convenience variable $_gthread holds the global number of |
| 1470 | the current thread. |
| 1471 | |
| 1472 | * The new convenience variable $_inferior holds the number of the |
| 1473 | current inferior. |
| 1474 | |
| 1475 | * GDB now displays the ID and name of the thread that hit a breakpoint |
| 1476 | or received a signal, if your program is multi-threaded. For |
| 1477 | example: |
| 1478 | |
| 1479 | Thread 3 "bar" hit Breakpoint 1 at 0x40087a: file program.c, line 20. |
| 1480 | Thread 1 "main" received signal SIGINT, Interrupt. |
| 1481 | |
| 1482 | * Record btrace now supports non-stop mode. |
| 1483 | |
| 1484 | * Support for tracepoints on aarch64-linux was added in GDBserver. |
| 1485 | |
| 1486 | * The 'record instruction-history' command now indicates speculative execution |
| 1487 | when using the Intel Processor Trace recording format. |
| 1488 | |
| 1489 | * GDB now allows users to specify explicit locations, bypassing |
| 1490 | the linespec parser. This feature is also available to GDB/MI |
| 1491 | clients. |
| 1492 | |
| 1493 | * Multi-architecture debugging is supported on AArch64 GNU/Linux. |
| 1494 | GDB now is able to debug both AArch64 applications and ARM applications |
| 1495 | at the same time. |
| 1496 | |
| 1497 | * Support for fast tracepoints on aarch64-linux was added in GDBserver, |
| 1498 | including JIT compiling fast tracepoint's conditional expression bytecode |
| 1499 | into native code. |
| 1500 | |
| 1501 | * GDB now supports displaced stepping on AArch64 GNU/Linux. |
| 1502 | |
| 1503 | * "info threads", "info inferiors", "info display", "info checkpoints" |
| 1504 | and "maint info program-spaces" now list the corresponding items in |
| 1505 | ascending ID order, for consistency with all other "info" commands. |
| 1506 | |
| 1507 | * In Ada, the overloads selection menu has been enhanced to display the |
| 1508 | parameter types and the return types for the matching overloaded subprograms. |
| 1509 | |
| 1510 | * New commands |
| 1511 | |
| 1512 | maint set target-non-stop (on|off|auto) |
| 1513 | maint show target-non-stop |
| 1514 | Control whether GDB targets always operate in non-stop mode even if |
| 1515 | "set non-stop" is "off". The default is "auto", meaning non-stop |
| 1516 | mode is enabled if supported by the target. |
| 1517 | |
| 1518 | maint set bfd-sharing |
| 1519 | maint show bfd-sharing |
| 1520 | Control the reuse of bfd objects. |
| 1521 | |
| 1522 | set debug bfd-cache |
| 1523 | show debug bfd-cache |
| 1524 | Control display of debugging info regarding bfd caching. |
| 1525 | |
| 1526 | set debug fbsd-lwp |
| 1527 | show debug fbsd-lwp |
| 1528 | Control display of debugging info regarding FreeBSD threads. |
| 1529 | |
| 1530 | set remote multiprocess-extensions-packet |
| 1531 | show remote multiprocess-extensions-packet |
| 1532 | Set/show the use of the remote protocol multiprocess extensions. |
| 1533 | |
| 1534 | set remote thread-events |
| 1535 | show remote thread-events |
| 1536 | Set/show the use of thread create/exit events. |
| 1537 | |
| 1538 | set ada print-signatures on|off |
| 1539 | show ada print-signatures" |
| 1540 | Control whether parameter types and return types are displayed in overloads |
| 1541 | selection menus. It is activaled (@code{on}) by default. |
| 1542 | |
| 1543 | set max-value-size |
| 1544 | show max-value-size |
| 1545 | Controls the maximum size of memory, in bytes, that GDB will |
| 1546 | allocate for value contents. Prevents incorrect programs from |
| 1547 | causing GDB to allocate overly large buffers. Default is 64k. |
| 1548 | |
| 1549 | * The "disassemble" command accepts a new modifier: /s. |
| 1550 | It prints mixed source+disassembly like /m with two differences: |
| 1551 | - disassembled instructions are now printed in program order, and |
| 1552 | - and source for all relevant files is now printed. |
| 1553 | The "/m" option is now considered deprecated: its "source-centric" |
| 1554 | output hasn't proved useful in practice. |
| 1555 | |
| 1556 | * The "record instruction-history" command accepts a new modifier: /s. |
| 1557 | It behaves exactly like /m and prints mixed source+disassembly. |
| 1558 | |
| 1559 | * The "set scheduler-locking" command supports a new mode "replay". |
| 1560 | It behaves like "off" in record mode and like "on" in replay mode. |
| 1561 | |
| 1562 | * Support for various ROM monitors has been removed: |
| 1563 | |
| 1564 | target dbug dBUG ROM monitor for Motorola ColdFire |
| 1565 | target picobug Motorola picobug monitor |
| 1566 | target dink32 DINK32 ROM monitor for PowerPC |
| 1567 | target m32r Renesas M32R/D ROM monitor |
| 1568 | target mon2000 mon2000 ROM monitor |
| 1569 | target ppcbug PPCBUG ROM monitor for PowerPC |
| 1570 | |
| 1571 | * Support for reading/writing memory and extracting values on architectures |
| 1572 | whose memory is addressable in units of any integral multiple of 8 bits. |
| 1573 | |
| 1574 | catch handlers |
| 1575 | Allows to break when an Ada exception is handled. |
| 1576 | |
| 1577 | * New remote packets |
| 1578 | |
| 1579 | exec stop reason |
| 1580 | Indicates that an exec system call was executed. |
| 1581 | |
| 1582 | exec-events feature in qSupported |
| 1583 | The qSupported packet allows GDB to request support for exec |
| 1584 | events using the new 'gdbfeature' exec-event, and the qSupported |
| 1585 | response can contain the corresponding 'stubfeature'. Set and |
| 1586 | show commands can be used to display whether these features are enabled. |
| 1587 | |
| 1588 | vCtrlC |
| 1589 | Equivalent to interrupting with the ^C character, but works in |
| 1590 | non-stop mode. |
| 1591 | |
| 1592 | thread created stop reason (T05 create:...) |
| 1593 | Indicates that the thread was just created and is stopped at entry. |
| 1594 | |
| 1595 | thread exit stop reply (w exitcode;tid) |
| 1596 | Indicates that the thread has terminated. |
| 1597 | |
| 1598 | QThreadEvents |
| 1599 | Enables/disables thread create and exit event reporting. For |
| 1600 | example, this is used in non-stop mode when GDB stops a set of |
| 1601 | threads and synchronously waits for the their corresponding stop |
| 1602 | replies. Without exit events, if one of the threads exits, GDB |
| 1603 | would hang forever not knowing that it should no longer expect a |
| 1604 | stop for that same thread. |
| 1605 | |
| 1606 | N stop reply |
| 1607 | Indicates that there are no resumed threads left in the target (all |
| 1608 | threads are stopped). The remote stub reports support for this stop |
| 1609 | reply to GDB's qSupported query. |
| 1610 | |
| 1611 | QCatchSyscalls |
| 1612 | Enables/disables catching syscalls from the inferior process. |
| 1613 | The remote stub reports support for this packet to GDB's qSupported query. |
| 1614 | |
| 1615 | syscall_entry stop reason |
| 1616 | Indicates that a syscall was just called. |
| 1617 | |
| 1618 | syscall_return stop reason |
| 1619 | Indicates that a syscall just returned. |
| 1620 | |
| 1621 | * Extended-remote exec events |
| 1622 | |
| 1623 | ** GDB now has support for exec events on extended-remote Linux targets. |
| 1624 | For such targets with Linux kernels 2.5.46 and later, this enables |
| 1625 | follow-exec-mode and exec catchpoints. |
| 1626 | |
| 1627 | set remote exec-event-feature-packet |
| 1628 | show remote exec-event-feature-packet |
| 1629 | Set/show the use of the remote exec event feature. |
| 1630 | |
| 1631 | * Thread names in remote protocol |
| 1632 | |
| 1633 | The reply to qXfer:threads:read may now include a name attribute for each |
| 1634 | thread. |
| 1635 | |
| 1636 | * Target remote mode fork and exec events |
| 1637 | |
| 1638 | ** GDB now has support for fork and exec events on target remote mode |
| 1639 | Linux targets. For such targets with Linux kernels 2.5.46 and later, |
| 1640 | this enables follow-fork-mode, detach-on-fork, follow-exec-mode, and |
| 1641 | fork and exec catchpoints. |
| 1642 | |
| 1643 | * Remote syscall events |
| 1644 | |
| 1645 | ** GDB now has support for catch syscall on remote Linux targets, |
| 1646 | currently enabled on x86/x86_64 architectures. |
| 1647 | |
| 1648 | set remote catch-syscall-packet |
| 1649 | show remote catch-syscall-packet |
| 1650 | Set/show the use of the remote catch syscall feature. |
| 1651 | |
| 1652 | * MI changes |
| 1653 | |
| 1654 | ** The -var-set-format command now accepts the zero-hexadecimal |
| 1655 | format. It outputs data in hexadecimal format with zero-padding on the |
| 1656 | left. |
| 1657 | |
| 1658 | * Python Scripting |
| 1659 | |
| 1660 | ** gdb.InferiorThread objects have a new attribute "global_num", |
| 1661 | which refers to the thread's global thread ID. The existing |
| 1662 | "num" attribute now refers to the thread's per-inferior number. |
| 1663 | See "Per-inferior thread numbers" above. |
| 1664 | ** gdb.InferiorThread objects have a new attribute "inferior", which |
| 1665 | is the Inferior object the thread belongs to. |
| 1666 | |
| 1667 | *** Changes in GDB 7.10 |
| 1668 | |
| 1669 | * Support for process record-replay and reverse debugging on aarch64*-linux* |
| 1670 | targets has been added. GDB now supports recording of A64 instruction set |
| 1671 | including advance SIMD instructions. |
| 1672 | |
| 1673 | * Support for Sun's version of the "stabs" debug file format has been removed. |
| 1674 | |
| 1675 | * GDB now honors the content of the file /proc/PID/coredump_filter |
| 1676 | (PID is the process ID) on GNU/Linux systems. This file can be used |
| 1677 | to specify the types of memory mappings that will be included in a |
| 1678 | corefile. For more information, please refer to the manual page of |
| 1679 | "core(5)". GDB also has a new command: "set use-coredump-filter |
| 1680 | on|off". It allows to set whether GDB will read the content of the |
| 1681 | /proc/PID/coredump_filter file when generating a corefile. |
| 1682 | |
| 1683 | * The "info os" command on GNU/Linux can now display information on |
| 1684 | cpu information : |
| 1685 | "info os cpus" Listing of all cpus/cores on the system |
| 1686 | |
| 1687 | * GDB has two new commands: "set serial parity odd|even|none" and |
| 1688 | "show serial parity". These allows to set or show parity for the |
| 1689 | remote serial I/O. |
| 1690 | |
| 1691 | * The "info source" command now displays the producer string if it was |
| 1692 | present in the debug info. This typically includes the compiler version |
| 1693 | and may include things like its command line arguments. |
| 1694 | |
| 1695 | * The "info dll", an alias of the "info sharedlibrary" command, |
| 1696 | is now available on all platforms. |
| 1697 | |
| 1698 | * Directory names supplied to the "set sysroot" commands may be |
| 1699 | prefixed with "target:" to tell GDB to access shared libraries from |
| 1700 | the target system, be it local or remote. This replaces the prefix |
| 1701 | "remote:". The default sysroot has been changed from "" to |
| 1702 | "target:". "remote:" is automatically converted to "target:" for |
| 1703 | backward compatibility. |
| 1704 | |
| 1705 | * The system root specified by "set sysroot" will be prepended to the |
| 1706 | filename of the main executable (if reported to GDB as absolute by |
| 1707 | the operating system) when starting processes remotely, and when |
| 1708 | attaching to already-running local or remote processes. |
| 1709 | |
| 1710 | * GDB now supports automatic location and retrieval of executable |
| 1711 | files from remote targets. Remote debugging can now be initiated |
| 1712 | using only a "target remote" or "target extended-remote" command |
| 1713 | (no "set sysroot" or "file" commands are required). See "New remote |
| 1714 | packets" below. |
| 1715 | |
| 1716 | * The "dump" command now supports verilog hex format. |
| 1717 | |
| 1718 | * GDB now supports the vector ABI on S/390 GNU/Linux targets. |
| 1719 | |
| 1720 | * On GNU/Linux, GDB and gdbserver are now able to access executable |
| 1721 | and shared library files without a "set sysroot" command when |
| 1722 | attaching to processes running in different mount namespaces from |
| 1723 | the debugger. This makes it possible to attach to processes in |
| 1724 | containers as simply as "gdb -p PID" or "gdbserver --attach PID". |
| 1725 | See "New remote packets" below. |
| 1726 | |
| 1727 | * The "tui reg" command now provides completion for all of the |
| 1728 | available register groups, including target specific groups. |
| 1729 | |
| 1730 | * The HISTSIZE environment variable is no longer read when determining |
| 1731 | the size of GDB's command history. GDB now instead reads the dedicated |
| 1732 | GDBHISTSIZE environment variable. Setting GDBHISTSIZE to "-1" or to "" now |
| 1733 | disables truncation of command history. Non-numeric values of GDBHISTSIZE |
| 1734 | are ignored. |
| 1735 | |
| 1736 | * Guile Scripting |
| 1737 | |
| 1738 | ** Memory ports can now be unbuffered. |
| 1739 | |
| 1740 | * Python Scripting |
| 1741 | |
| 1742 | ** gdb.Objfile objects have a new attribute "username", |
| 1743 | which is the name of the objfile as specified by the user, |
| 1744 | without, for example, resolving symlinks. |
| 1745 | ** You can now write frame unwinders in Python. |
| 1746 | ** gdb.Type objects have a new method "optimized_out", |
| 1747 | returning optimized out gdb.Value instance of this type. |
| 1748 | ** gdb.Value objects have new methods "reference_value" and |
| 1749 | "const_value" which return a reference to the value and a |
| 1750 | "const" version of the value respectively. |
| 1751 | |
| 1752 | * New commands |
| 1753 | |
| 1754 | maint print symbol-cache |
| 1755 | Print the contents of the symbol cache. |
| 1756 | |
| 1757 | maint print symbol-cache-statistics |
| 1758 | Print statistics of symbol cache usage. |
| 1759 | |
| 1760 | maint flush-symbol-cache |
| 1761 | Flush the contents of the symbol cache. |
| 1762 | |
| 1763 | record btrace bts |
| 1764 | record bts |
| 1765 | Start branch trace recording using Branch Trace Store (BTS) format. |
| 1766 | |
| 1767 | compile print |
| 1768 | Evaluate expression by using the compiler and print result. |
| 1769 | |
| 1770 | tui enable |
| 1771 | tui disable |
| 1772 | Explicit commands for enabling and disabling tui mode. |
| 1773 | |
| 1774 | show mpx bound |
| 1775 | set mpx bound on i386 and amd64 |
| 1776 | Support for bound table investigation on Intel MPX enabled applications. |
| 1777 | |
| 1778 | record btrace pt |
| 1779 | record pt |
| 1780 | Start branch trace recording using Intel Processor Trace format. |
| 1781 | |
| 1782 | maint info btrace |
| 1783 | Print information about branch tracing internals. |
| 1784 | |
| 1785 | maint btrace packet-history |
| 1786 | Print the raw branch tracing data. |
| 1787 | |
| 1788 | maint btrace clear-packet-history |
| 1789 | Discard the stored raw branch tracing data. |
| 1790 | |
| 1791 | maint btrace clear |
| 1792 | Discard all branch tracing data. It will be fetched and processed |
| 1793 | anew by the next "record" command. |
| 1794 | |
| 1795 | * New options |
| 1796 | |
| 1797 | set debug dwarf-die |
| 1798 | Renamed from "set debug dwarf2-die". |
| 1799 | show debug dwarf-die |
| 1800 | Renamed from "show debug dwarf2-die". |
| 1801 | |
| 1802 | set debug dwarf-read |
| 1803 | Renamed from "set debug dwarf2-read". |
| 1804 | show debug dwarf-read |
| 1805 | Renamed from "show debug dwarf2-read". |
| 1806 | |
| 1807 | maint set dwarf always-disassemble |
| 1808 | Renamed from "maint set dwarf2 always-disassemble". |
| 1809 | maint show dwarf always-disassemble |
| 1810 | Renamed from "maint show dwarf2 always-disassemble". |
| 1811 | |
| 1812 | maint set dwarf max-cache-age |
| 1813 | Renamed from "maint set dwarf2 max-cache-age". |
| 1814 | maint show dwarf max-cache-age |
| 1815 | Renamed from "maint show dwarf2 max-cache-age". |
| 1816 | |
| 1817 | set debug dwarf-line |
| 1818 | show debug dwarf-line |
| 1819 | Control display of debugging info regarding DWARF line processing. |
| 1820 | |
| 1821 | set max-completions |
| 1822 | show max-completions |
| 1823 | Set the maximum number of candidates to be considered during |
| 1824 | completion. The default value is 200. This limit allows GDB |
| 1825 | to avoid generating large completion lists, the computation of |
| 1826 | which can cause the debugger to become temporarily unresponsive. |
| 1827 | |
| 1828 | set history remove-duplicates |
| 1829 | show history remove-duplicates |
| 1830 | Control the removal of duplicate history entries. |
| 1831 | |
| 1832 | maint set symbol-cache-size |
| 1833 | maint show symbol-cache-size |
| 1834 | Control the size of the symbol cache. |
| 1835 | |
| 1836 | set|show record btrace bts buffer-size |
| 1837 | Set and show the size of the ring buffer used for branch tracing in |
| 1838 | BTS format. |
| 1839 | The obtained size may differ from the requested size. Use "info |
| 1840 | record" to see the obtained buffer size. |
| 1841 | |
| 1842 | set debug linux-namespaces |
| 1843 | show debug linux-namespaces |
| 1844 | Control display of debugging info regarding Linux namespaces. |
| 1845 | |
| 1846 | set|show record btrace pt buffer-size |
| 1847 | Set and show the size of the ring buffer used for branch tracing in |
| 1848 | Intel Processor Trace format. |
| 1849 | The obtained size may differ from the requested size. Use "info |
| 1850 | record" to see the obtained buffer size. |
| 1851 | |
| 1852 | maint set|show btrace pt skip-pad |
| 1853 | Set and show whether PAD packets are skipped when computing the |
| 1854 | packet history. |
| 1855 | |
| 1856 | * The command 'thread apply all' can now support new option '-ascending' |
| 1857 | to call its specified command for all threads in ascending order. |
| 1858 | |
| 1859 | * Python/Guile scripting |
| 1860 | |
| 1861 | ** GDB now supports auto-loading of Python/Guile scripts contained in the |
| 1862 | special section named `.debug_gdb_scripts'. |
| 1863 | |
| 1864 | * New remote packets |
| 1865 | |
| 1866 | qXfer:btrace-conf:read |
| 1867 | Return the branch trace configuration for the current thread. |
| 1868 | |
| 1869 | Qbtrace-conf:bts:size |
| 1870 | Set the requested ring buffer size for branch tracing in BTS format. |
| 1871 | |
| 1872 | Qbtrace:pt |
| 1873 | Enable Intel Procesor Trace-based branch tracing for the current |
| 1874 | process. The remote stub reports support for this packet to GDB's |
| 1875 | qSupported query. |
| 1876 | |
| 1877 | Qbtrace-conf:pt:size |
| 1878 | Set the requested ring buffer size for branch tracing in Intel Processor |
| 1879 | Trace format. |
| 1880 | |
| 1881 | swbreak stop reason |
| 1882 | Indicates a memory breakpoint instruction was executed, irrespective |
| 1883 | of whether it was GDB that planted the breakpoint or the breakpoint |
| 1884 | is hardcoded in the program. This is required for correct non-stop |
| 1885 | mode operation. |
| 1886 | |
| 1887 | hwbreak stop reason |
| 1888 | Indicates the target stopped for a hardware breakpoint. This is |
| 1889 | required for correct non-stop mode operation. |
| 1890 | |
| 1891 | vFile:fstat: |
| 1892 | Return information about files on the remote system. |
| 1893 | |
| 1894 | qXfer:exec-file:read |
| 1895 | Return the full absolute name of the file that was executed to |
| 1896 | create a process running on the remote system. |
| 1897 | |
| 1898 | vFile:setfs: |
| 1899 | Select the filesystem on which vFile: operations with filename |
| 1900 | arguments will operate. This is required for GDB to be able to |
| 1901 | access files on remote targets where the remote stub does not |
| 1902 | share a common filesystem with the inferior(s). |
| 1903 | |
| 1904 | fork stop reason |
| 1905 | Indicates that a fork system call was executed. |
| 1906 | |
| 1907 | vfork stop reason |
| 1908 | Indicates that a vfork system call was executed. |
| 1909 | |
| 1910 | vforkdone stop reason |
| 1911 | Indicates that a vfork child of the specified process has executed |
| 1912 | an exec or exit, allowing the vfork parent to resume execution. |
| 1913 | |
| 1914 | fork-events and vfork-events features in qSupported |
| 1915 | The qSupported packet allows GDB to request support for fork and |
| 1916 | vfork events using new 'gdbfeatures' fork-events and vfork-events, |
| 1917 | and the qSupported response can contain the corresponding |
| 1918 | 'stubfeatures'. Set and show commands can be used to display |
| 1919 | whether these features are enabled. |
| 1920 | |
| 1921 | * Extended-remote fork events |
| 1922 | |
| 1923 | ** GDB now has support for fork events on extended-remote Linux |
| 1924 | targets. For targets with Linux kernels 2.5.60 and later, this |
| 1925 | enables follow-fork-mode and detach-on-fork for both fork and |
| 1926 | vfork, as well as fork and vfork catchpoints. |
| 1927 | |
| 1928 | * The info record command now shows the recording format and the |
| 1929 | branch tracing configuration for the current thread when using |
| 1930 | the btrace record target. |
| 1931 | For the BTS format, it shows the ring buffer size. |
| 1932 | |
| 1933 | * GDB now has support for DTrace USDT (Userland Static Defined |
| 1934 | Tracing) probes. The supported targets are x86_64-*-linux-gnu. |
| 1935 | |
| 1936 | * GDB now supports access to vector registers on S/390 GNU/Linux |
| 1937 | targets. |
| 1938 | |
| 1939 | * Removed command line options |
| 1940 | |
| 1941 | -xdb HP-UX XDB compatibility mode. |
| 1942 | |
| 1943 | * Removed targets and native configurations |
| 1944 | |
| 1945 | HP/PA running HP-UX hppa*-*-hpux* |
| 1946 | Itanium running HP-UX ia64-*-hpux* |
| 1947 | |
| 1948 | * New configure options |
| 1949 | |
| 1950 | --with-intel-pt |
| 1951 | This configure option allows the user to build GDB with support for |
| 1952 | Intel Processor Trace (default: auto). This requires libipt. |
| 1953 | |
| 1954 | --with-libipt-prefix=PATH |
| 1955 | Specify the path to the version of libipt that GDB should use. |
| 1956 | $PATH/include should contain the intel-pt.h header and |
| 1957 | $PATH/lib should contain the libipt.so library. |
| 1958 | |
| 1959 | *** Changes in GDB 7.9.1 |
| 1960 | |
| 1961 | * Python Scripting |
| 1962 | |
| 1963 | ** Xmethods can now specify a result type. |
| 1964 | |
| 1965 | *** Changes in GDB 7.9 |
| 1966 | |
| 1967 | * GDB now supports hardware watchpoints on x86 GNU Hurd. |
| 1968 | |
| 1969 | * Python Scripting |
| 1970 | |
| 1971 | ** You can now access frame registers from Python scripts. |
| 1972 | ** New attribute 'producer' for gdb.Symtab objects. |
| 1973 | ** gdb.Objfile objects have a new attribute "progspace", |
| 1974 | which is the gdb.Progspace object of the containing program space. |
| 1975 | ** gdb.Objfile objects have a new attribute "owner". |
| 1976 | ** gdb.Objfile objects have a new attribute "build_id", |
| 1977 | which is the build ID generated when the file was built. |
| 1978 | ** gdb.Objfile objects have a new method "add_separate_debug_file". |
| 1979 | ** A new event "gdb.clear_objfiles" has been added, triggered when |
| 1980 | selecting a new file to debug. |
| 1981 | ** You can now add attributes to gdb.Objfile and gdb.Progspace objects. |
| 1982 | ** New function gdb.lookup_objfile. |
| 1983 | |
| 1984 | New events which are triggered when GDB modifies the state of the |
| 1985 | inferior. |
| 1986 | |
| 1987 | ** gdb.events.inferior_call_pre: Function call is about to be made. |
| 1988 | ** gdb.events.inferior_call_post: Function call has just been made. |
| 1989 | ** gdb.events.memory_changed: A memory location has been altered. |
| 1990 | ** gdb.events.register_changed: A register has been altered. |
| 1991 | |
| 1992 | * New Python-based convenience functions: |
| 1993 | |
| 1994 | ** $_caller_is(name [, number_of_frames]) |
| 1995 | ** $_caller_matches(regexp [, number_of_frames]) |
| 1996 | ** $_any_caller_is(name [, number_of_frames]) |
| 1997 | ** $_any_caller_matches(regexp [, number_of_frames]) |
| 1998 | |
| 1999 | * GDB now supports the compilation and injection of source code into |
| 2000 | the inferior. GDB will use GCC 5.0 or higher built with libcc1.so |
| 2001 | to compile the source code to object code, and if successful, inject |
| 2002 | and execute that code within the current context of the inferior. |
| 2003 | Currently the C language is supported. The commands used to |
| 2004 | interface with this new feature are: |
| 2005 | |
| 2006 | compile code [-raw|-r] [--] [source code] |
| 2007 | compile file [-raw|-r] filename |
| 2008 | |
| 2009 | * New commands |
| 2010 | |
| 2011 | demangle [-l language] [--] name |
| 2012 | Demangle "name" in the specified language, or the current language |
| 2013 | if elided. This command is renamed from the "maint demangle" command. |
| 2014 | The latter is kept as a no-op to avoid "maint demangle" being interpreted |
| 2015 | as "maint demangler-warning". |
| 2016 | |
| 2017 | queue-signal signal-name-or-number |
| 2018 | Queue a signal to be delivered to the thread when it is resumed. |
| 2019 | |
| 2020 | add-auto-load-scripts-directory directory |
| 2021 | Add entries to the list of directories from which to load auto-loaded |
| 2022 | scripts. |
| 2023 | |
| 2024 | maint print user-registers |
| 2025 | List all currently available "user" registers. |
| 2026 | |
| 2027 | compile code [-r|-raw] [--] [source code] |
| 2028 | Compile, inject, and execute in the inferior the executable object |
| 2029 | code produced by compiling the provided source code. |
| 2030 | |
| 2031 | compile file [-r|-raw] filename |
| 2032 | Compile and inject into the inferior the executable object code |
| 2033 | produced by compiling the source code stored in the filename |
| 2034 | provided. |
| 2035 | |
| 2036 | * On resume, GDB now always passes the signal the program had stopped |
| 2037 | for to the thread the signal was sent to, even if the user changed |
| 2038 | threads before resuming. Previously GDB would often (but not |
| 2039 | always) deliver the signal to the thread that happens to be current |
| 2040 | at resume time. |
| 2041 | |
| 2042 | * Conversely, the "signal" command now consistently delivers the |
| 2043 | requested signal to the current thread. GDB now asks for |
| 2044 | confirmation if the program had stopped for a signal and the user |
| 2045 | switched threads meanwhile. |
| 2046 | |
| 2047 | * "breakpoint always-inserted" modes "off" and "auto" merged. |
| 2048 | |
| 2049 | Now, when 'breakpoint always-inserted mode' is set to "off", GDB |
| 2050 | won't remove breakpoints from the target until all threads stop, |
| 2051 | even in non-stop mode. The "auto" mode has been removed, and "off" |
| 2052 | is now the default mode. |
| 2053 | |
| 2054 | * New options |
| 2055 | |
| 2056 | set debug symbol-lookup |
| 2057 | show debug symbol-lookup |
| 2058 | Control display of debugging info regarding symbol lookup. |
| 2059 | |
| 2060 | * MI changes |
| 2061 | |
| 2062 | ** The -list-thread-groups command outputs an exit-code field for |
| 2063 | inferiors that have exited. |
| 2064 | |
| 2065 | * New targets |
| 2066 | |
| 2067 | MIPS SDE mips*-sde*-elf* |
| 2068 | |
| 2069 | * Removed targets |
| 2070 | |
| 2071 | Support for these obsolete configurations has been removed. |
| 2072 | |
| 2073 | Alpha running OSF/1 (or Tru64) alpha*-*-osf* |
| 2074 | SGI Irix-5.x mips-*-irix5* |
| 2075 | SGI Irix-6.x mips-*-irix6* |
| 2076 | VAX running (4.2 - 4.3 Reno) BSD vax-*-bsd* |
| 2077 | VAX running Ultrix vax-*-ultrix* |
| 2078 | |
| 2079 | * The "dll-symbols" command, and its two aliases ("add-shared-symbol-files" |
| 2080 | and "assf"), have been removed. Use the "sharedlibrary" command, or |
| 2081 | its alias "share", instead. |
| 2082 | |
| 2083 | *** Changes in GDB 7.8 |
| 2084 | |
| 2085 | * New command line options |
| 2086 | |
| 2087 | -D data-directory |
| 2088 | This is an alias for the --data-directory option. |
| 2089 | |
| 2090 | * GDB supports printing and modifying of variable length automatic arrays |
| 2091 | as specified in ISO C99. |
| 2092 | |
| 2093 | * The ARM simulator now supports instruction level tracing |
| 2094 | with or without disassembly. |
| 2095 | |
| 2096 | * Guile scripting |
| 2097 | |
| 2098 | GDB now has support for scripting using Guile. Whether this is |
| 2099 | available is determined at configure time. |
| 2100 | Guile version 2.0 or greater is required. |
| 2101 | Guile version 2.0.9 is well tested, earlier 2.0 versions are not. |
| 2102 | |
| 2103 | * New commands (for set/show, see "New options" below) |
| 2104 | |
| 2105 | guile [code] |
| 2106 | gu [code] |
| 2107 | Invoke CODE by passing it to the Guile interpreter. |
| 2108 | |
| 2109 | guile-repl |
| 2110 | gr |
| 2111 | Start a Guile interactive prompt (or "repl" for "read-eval-print loop"). |
| 2112 | |
| 2113 | info auto-load guile-scripts [regexp] |
| 2114 | Print the list of automatically loaded Guile scripts. |
| 2115 | |
| 2116 | * The source command is now capable of sourcing Guile scripts. |
| 2117 | This feature is dependent on the debugger being built with Guile support. |
| 2118 | |
| 2119 | * New options |
| 2120 | |
| 2121 | set print symbol-loading (off|brief|full) |
| 2122 | show print symbol-loading |
| 2123 | Control whether to print informational messages when loading symbol |
| 2124 | information for a file. The default is "full", but when debugging |
| 2125 | programs with large numbers of shared libraries the amount of output |
| 2126 | becomes less useful. |
| 2127 | |
| 2128 | set guile print-stack (none|message|full) |
| 2129 | show guile print-stack |
| 2130 | Show a stack trace when an error is encountered in a Guile script. |
| 2131 | |
| 2132 | set auto-load guile-scripts (on|off) |
| 2133 | show auto-load guile-scripts |
| 2134 | Control auto-loading of Guile script files. |
| 2135 | |
| 2136 | maint ada set ignore-descriptive-types (on|off) |
| 2137 | maint ada show ignore-descriptive-types |
| 2138 | Control whether the debugger should ignore descriptive types in Ada |
| 2139 | programs. The default is not to ignore the descriptive types. See |
| 2140 | the user manual for more details on descriptive types and the intended |
| 2141 | usage of this option. |
| 2142 | |
| 2143 | set auto-connect-native-target |
| 2144 | |
| 2145 | Control whether GDB is allowed to automatically connect to the |
| 2146 | native target for the run, attach, etc. commands when not connected |
| 2147 | to any target yet. See also "target native" below. |
| 2148 | |
| 2149 | set record btrace replay-memory-access (read-only|read-write) |
| 2150 | show record btrace replay-memory-access |
| 2151 | Control what memory accesses are allowed during replay. |
| 2152 | |
| 2153 | maint set target-async (on|off) |
| 2154 | maint show target-async |
| 2155 | This controls whether GDB targets operate in synchronous or |
| 2156 | asynchronous mode. Normally the default is asynchronous, if it is |
| 2157 | available; but this can be changed to more easily debug problems |
| 2158 | occurring only in synchronous mode. |
| 2159 | |
| 2160 | set mi-async (on|off) |
| 2161 | show mi-async |
| 2162 | Control whether MI asynchronous mode is preferred. This supersedes |
| 2163 | "set target-async" of previous GDB versions. |
| 2164 | |
| 2165 | * "set target-async" is deprecated as a CLI option and is now an alias |
| 2166 | for "set mi-async" (only puts MI into async mode). |
| 2167 | |
| 2168 | * Background execution commands (e.g., "c&", "s&", etc.) are now |
| 2169 | possible ``out of the box'' if the target supports them. Previously |
| 2170 | the user would need to explicitly enable the possibility with the |
| 2171 | "set target-async on" command. |
| 2172 | |
| 2173 | * New features in the GDB remote stub, GDBserver |
| 2174 | |
| 2175 | ** New option --debug-format=option1[,option2,...] allows one to add |
| 2176 | additional text to each output. At present only timestamps |
| 2177 | are supported: --debug-format=timestamps. |
| 2178 | Timestamps can also be turned on with the |
| 2179 | "monitor set debug-format timestamps" command from GDB. |
| 2180 | |
| 2181 | * The 'record instruction-history' command now starts counting instructions |
| 2182 | at one. This also affects the instruction ranges reported by the |
| 2183 | 'record function-call-history' command when given the /i modifier. |
| 2184 | |
| 2185 | * The command 'record function-call-history' supports a new modifier '/c' to |
| 2186 | indent the function names based on their call stack depth. |
| 2187 | The fields for the '/i' and '/l' modifier have been reordered. |
| 2188 | The source line range is now prefixed with 'at'. |
| 2189 | The instruction range is now prefixed with 'inst'. |
| 2190 | Both ranges are now printed as '<from>, <to>' to allow copy&paste to the |
| 2191 | "record instruction-history" and "list" commands. |
| 2192 | |
| 2193 | * The ranges given as arguments to the 'record function-call-history' and |
| 2194 | 'record instruction-history' commands are now inclusive. |
| 2195 | |
| 2196 | * The btrace record target now supports the 'record goto' command. |
| 2197 | For locations inside the execution trace, the back trace is computed |
| 2198 | based on the information stored in the execution trace. |
| 2199 | |
| 2200 | * The btrace record target supports limited reverse execution and replay. |
| 2201 | The target does not record data and therefore does not allow reading |
| 2202 | memory or registers. |
| 2203 | |
| 2204 | * The "catch syscall" command now works on s390*-linux* targets. |
| 2205 | |
| 2206 | * The "compare-sections" command is no longer specific to target |
| 2207 | remote. It now works with all targets. |
| 2208 | |
| 2209 | * All native targets are now consistently called "native". |
| 2210 | Consequently, the "target child", "target GNU", "target djgpp", |
| 2211 | "target procfs" (Solaris/Irix/OSF/AIX) and "target darwin-child" |
| 2212 | commands have been replaced with "target native". The QNX/NTO port |
| 2213 | leaves the "procfs" target in place and adds a "native" target for |
| 2214 | consistency with other ports. The impact on users should be minimal |
| 2215 | as these commands previously either throwed an error, or were |
| 2216 | no-ops. The target's name is visible in the output of the following |
| 2217 | commands: "help target", "info target", "info files", "maint print |
| 2218 | target-stack". |
| 2219 | |
| 2220 | * The "target native" command now connects to the native target. This |
| 2221 | can be used to launch native programs even when "set |
| 2222 | auto-connect-native-target" is set to off. |
| 2223 | |
| 2224 | * GDB now supports access to Intel MPX registers on GNU/Linux. |
| 2225 | |
| 2226 | * Support for Intel AVX-512 registers on GNU/Linux. |
| 2227 | Support displaying and modifying Intel AVX-512 registers |
| 2228 | $zmm0 - $zmm31 and $k0 - $k7 on GNU/Linux. |
| 2229 | |
| 2230 | * New remote packets |
| 2231 | |
| 2232 | qXfer:btrace:read's annex |
| 2233 | The qXfer:btrace:read packet supports a new annex 'delta' to read |
| 2234 | branch trace incrementally. |
| 2235 | |
| 2236 | * Python Scripting |
| 2237 | |
| 2238 | ** Valid Python operations on gdb.Value objects representing |
| 2239 | structs/classes invoke the corresponding overloaded operators if |
| 2240 | available. |
| 2241 | ** New `Xmethods' feature in the Python API. Xmethods are |
| 2242 | additional methods or replacements for existing methods of a C++ |
| 2243 | class. This feature is useful for those cases where a method |
| 2244 | defined in C++ source code could be inlined or optimized out by |
| 2245 | the compiler, making it unavailable to GDB. |
| 2246 | |
| 2247 | * New targets |
| 2248 | PowerPC64 GNU/Linux little-endian powerpc64le-*-linux* |
| 2249 | |
| 2250 | * The "dll-symbols" command, and its two aliases ("add-shared-symbol-files" |
| 2251 | and "assf"), have been deprecated. Use the "sharedlibrary" command, or |
| 2252 | its alias "share", instead. |
| 2253 | |
| 2254 | * The commands "set remotebaud" and "show remotebaud" are no longer |
| 2255 | supported. Use "set serial baud" and "show serial baud" (respectively) |
| 2256 | instead. |
| 2257 | |
| 2258 | * MI changes |
| 2259 | |
| 2260 | ** A new option "-gdb-set mi-async" replaces "-gdb-set |
| 2261 | target-async". The latter is left as a deprecated alias of the |
| 2262 | former for backward compatibility. If the target supports it, |
| 2263 | CLI background execution commands are now always possible by |
| 2264 | default, independently of whether the frontend stated a |
| 2265 | preference for asynchronous execution with "-gdb-set mi-async". |
| 2266 | Previously "-gdb-set target-async off" affected both MI execution |
| 2267 | commands and CLI execution commands. |
| 2268 | |
| 2269 | *** Changes in GDB 7.7 |
| 2270 | |
| 2271 | * Improved support for process record-replay and reverse debugging on |
| 2272 | arm*-linux* targets. Support for thumb32 and syscall instruction |
| 2273 | recording has been added. |
| 2274 | |
| 2275 | * GDB now supports SystemTap SDT probes on AArch64 GNU/Linux. |
| 2276 | |
| 2277 | * GDB now supports Fission DWP file format version 2. |
| 2278 | http://gcc.gnu.org/wiki/DebugFission |
| 2279 | |
| 2280 | * New convenience function "$_isvoid", to check whether an expression |
| 2281 | is void. A void expression is an expression where the type of the |
| 2282 | result is "void". For example, some convenience variables may be |
| 2283 | "void" when evaluated (e.g., "$_exitcode" before the execution of |
| 2284 | the program being debugged; or an undefined convenience variable). |
| 2285 | Another example, when calling a function whose return type is |
| 2286 | "void". |
| 2287 | |
| 2288 | * The "maintenance print objfiles" command now takes an optional regexp. |
| 2289 | |
| 2290 | * The "catch syscall" command now works on arm*-linux* targets. |
| 2291 | |
| 2292 | * GDB now consistently shows "<not saved>" when printing values of |
| 2293 | registers the debug info indicates have not been saved in the frame |
| 2294 | and there's nowhere to retrieve them from |
| 2295 | (callee-saved/call-clobbered registers): |
| 2296 | |
| 2297 | (gdb) p $rax |
| 2298 | $1 = <not saved> |
| 2299 | |
| 2300 | (gdb) info registers rax |
| 2301 | rax <not saved> |
| 2302 | |
| 2303 | Before, the former would print "<optimized out>", and the latter |
| 2304 | "*value not available*". |
| 2305 | |
| 2306 | * New script contrib/gdb-add-index.sh for adding .gdb_index sections |
| 2307 | to binaries. |
| 2308 | |
| 2309 | * Python scripting |
| 2310 | |
| 2311 | ** Frame filters and frame decorators have been added. |
| 2312 | ** Temporary breakpoints are now supported. |
| 2313 | ** Line tables representation has been added. |
| 2314 | ** New attribute 'parent_type' for gdb.Field objects. |
| 2315 | ** gdb.Field objects can be used as subscripts on gdb.Value objects. |
| 2316 | ** New attribute 'name' for gdb.Type objects. |
| 2317 | |
| 2318 | * New targets |
| 2319 | |
| 2320 | Nios II ELF nios2*-*-elf |
| 2321 | Nios II GNU/Linux nios2*-*-linux |
| 2322 | Texas Instruments MSP430 msp430*-*-elf |
| 2323 | |
| 2324 | * Removed native configurations |
| 2325 | |
| 2326 | Support for these a.out NetBSD and OpenBSD obsolete configurations has |
| 2327 | been removed. ELF variants of these configurations are kept supported. |
| 2328 | |
| 2329 | arm*-*-netbsd* but arm*-*-netbsdelf* is kept supported. |
| 2330 | i[34567]86-*-netbsd* but i[34567]86-*-netbsdelf* is kept supported. |
| 2331 | i[34567]86-*-openbsd[0-2].* but i[34567]86-*-openbsd* is kept supported. |
| 2332 | i[34567]86-*-openbsd3.[0-3] |
| 2333 | m68*-*-netbsd* but m68*-*-netbsdelf* is kept supported. |
| 2334 | sparc-*-netbsd* but sparc-*-netbsdelf* is kept supported. |
| 2335 | vax-*-netbsd* but vax-*-netbsdelf* is kept supported. |
| 2336 | |
| 2337 | * New commands: |
| 2338 | catch rethrow |
| 2339 | Like "catch throw", but catches a re-thrown exception. |
| 2340 | maint check-psymtabs |
| 2341 | Renamed from old "maint check-symtabs". |
| 2342 | maint check-symtabs |
| 2343 | Perform consistency checks on symtabs. |
| 2344 | maint expand-symtabs |
| 2345 | Expand symtabs matching an optional regexp. |
| 2346 | |
| 2347 | show configuration |
| 2348 | Display the details of GDB configure-time options. |
| 2349 | |
| 2350 | maint set|show per-command |
| 2351 | maint set|show per-command space |
| 2352 | maint set|show per-command time |
| 2353 | maint set|show per-command symtab |
| 2354 | Enable display of per-command gdb resource usage. |
| 2355 | |
| 2356 | remove-symbol-file FILENAME |
| 2357 | remove-symbol-file -a ADDRESS |
| 2358 | Remove a symbol file added via add-symbol-file. The file to remove |
| 2359 | can be identified by its filename or by an address that lies within |
| 2360 | the boundaries of this symbol file in memory. |
| 2361 | |
| 2362 | info exceptions |
| 2363 | info exceptions REGEXP |
| 2364 | Display the list of Ada exceptions defined in the program being |
| 2365 | debugged. If provided, only the exceptions whose names match REGEXP |
| 2366 | are listed. |
| 2367 | |
| 2368 | * New options |
| 2369 | |
| 2370 | set debug symfile off|on |
| 2371 | show debug symfile |
| 2372 | Control display of debugging info regarding reading symbol files and |
| 2373 | symbol tables within those files |
| 2374 | |
| 2375 | set print raw frame-arguments |
| 2376 | show print raw frame-arguments |
| 2377 | Set/show whether to print frame arguments in raw mode, |
| 2378 | disregarding any defined pretty-printers. |
| 2379 | |
| 2380 | set remote trace-status-packet |
| 2381 | show remote trace-status-packet |
| 2382 | Set/show the use of remote protocol qTStatus packet. |
| 2383 | |
| 2384 | set debug nios2 |
| 2385 | show debug nios2 |
| 2386 | Control display of debugging messages related to Nios II targets. |
| 2387 | |
| 2388 | set range-stepping |
| 2389 | show range-stepping |
| 2390 | Control whether target-assisted range stepping is enabled. |
| 2391 | |
| 2392 | set startup-with-shell |
| 2393 | show startup-with-shell |
| 2394 | Specifies whether Unix child processes are started via a shell or |
| 2395 | directly. |
| 2396 | |
| 2397 | set code-cache |
| 2398 | show code-cache |
| 2399 | Use the target memory cache for accesses to the code segment. This |
| 2400 | improves performance of remote debugging (particularly disassembly). |
| 2401 | |
| 2402 | * You can now use a literal value 'unlimited' for options that |
| 2403 | interpret 0 or -1 as meaning "unlimited". E.g., "set |
| 2404 | trace-buffer-size unlimited" is now an alias for "set |
| 2405 | trace-buffer-size -1" and "set height unlimited" is now an alias for |
| 2406 | "set height 0". |
| 2407 | |
| 2408 | * The "set debug symtab-create" debugging option of GDB has been changed to |
| 2409 | accept a verbosity level. 0 means "off", 1 provides basic debugging |
| 2410 | output, and values of 2 or greater provides more verbose output. |
| 2411 | |
| 2412 | * New command-line options |
| 2413 | --configuration |
| 2414 | Display the details of GDB configure-time options. |
| 2415 | |
| 2416 | * The command 'tsave' can now support new option '-ctf' to save trace |
| 2417 | buffer in Common Trace Format. |
| 2418 | |
| 2419 | * Newly installed $prefix/bin/gcore acts as a shell interface for the |
| 2420 | GDB command gcore. |
| 2421 | |
| 2422 | * GDB now implements the C++ 'typeid' operator. |
| 2423 | |
| 2424 | * The new convenience variable $_exception holds the exception being |
| 2425 | thrown or caught at an exception-related catchpoint. |
| 2426 | |
| 2427 | * The exception-related catchpoints, like "catch throw", now accept a |
| 2428 | regular expression which can be used to filter exceptions by type. |
| 2429 | |
| 2430 | * The new convenience variable $_exitsignal is automatically set to |
| 2431 | the terminating signal number when the program being debugged dies |
| 2432 | due to an uncaught signal. |
| 2433 | |
| 2434 | * MI changes |
| 2435 | |
| 2436 | ** All MI commands now accept an optional "--language" option. |
| 2437 | Support for this feature can be verified by using the "-list-features" |
| 2438 | command, which should contain "language-option". |
| 2439 | |
| 2440 | ** The new command -info-gdb-mi-command allows the user to determine |
| 2441 | whether a GDB/MI command is supported or not. |
| 2442 | |
| 2443 | ** The "^error" result record returned when trying to execute an undefined |
| 2444 | GDB/MI command now provides a variable named "code" whose content is the |
| 2445 | "undefined-command" error code. Support for this feature can be verified |
| 2446 | by using the "-list-features" command, which should contain |
| 2447 | "undefined-command-error-code". |
| 2448 | |
| 2449 | ** The -trace-save MI command can optionally save trace buffer in Common |
| 2450 | Trace Format now. |
| 2451 | |
| 2452 | ** The new command -dprintf-insert sets a dynamic printf breakpoint. |
| 2453 | |
| 2454 | ** The command -data-list-register-values now accepts an optional |
| 2455 | "--skip-unavailable" option. When used, only the available registers |
| 2456 | are displayed. |
| 2457 | |
| 2458 | ** The new command -trace-frame-collected dumps collected variables, |
| 2459 | computed expressions, tvars, memory and registers in a traceframe. |
| 2460 | |
| 2461 | ** The commands -stack-list-locals, -stack-list-arguments and |
| 2462 | -stack-list-variables now accept an option "--skip-unavailable". |
| 2463 | When used, only the available locals or arguments are displayed. |
| 2464 | |
| 2465 | ** The -exec-run command now accepts an optional "--start" option. |
| 2466 | When used, the command follows the same semantics as the "start" |
| 2467 | command, stopping the program's execution at the start of its |
| 2468 | main subprogram. Support for this feature can be verified using |
| 2469 | the "-list-features" command, which should contain |
| 2470 | "exec-run-start-option". |
| 2471 | |
| 2472 | ** The new commands -catch-assert and -catch-exceptions insert |
| 2473 | catchpoints stopping the program when Ada exceptions are raised. |
| 2474 | |
| 2475 | ** The new command -info-ada-exceptions provides the equivalent of |
| 2476 | the new "info exceptions" command. |
| 2477 | |
| 2478 | * New system-wide configuration scripts |
| 2479 | A GDB installation now provides scripts suitable for use as system-wide |
| 2480 | configuration scripts for the following systems: |
| 2481 | ** ElinOS |
| 2482 | ** Wind River Linux |
| 2483 | |
| 2484 | * GDB now supports target-assigned range stepping with remote targets. |
| 2485 | This improves the performance of stepping source lines by reducing |
| 2486 | the number of control packets from/to GDB. See "New remote packets" |
| 2487 | below. |
| 2488 | |
| 2489 | * GDB now understands the element 'tvar' in the XML traceframe info. |
| 2490 | It has the id of the collected trace state variables. |
| 2491 | |
| 2492 | * On S/390 targets that provide the transactional-execution feature, |
| 2493 | the program interruption transaction diagnostic block (TDB) is now |
| 2494 | represented as a number of additional "registers" in GDB. |
| 2495 | |
| 2496 | * New remote packets |
| 2497 | |
| 2498 | vCont;r |
| 2499 | |
| 2500 | The vCont packet supports a new 'r' action, that tells the remote |
| 2501 | stub to step through an address range itself, without GDB |
| 2502 | involvemement at each single-step. |
| 2503 | |
| 2504 | qXfer:libraries-svr4:read's annex |
| 2505 | The previously unused annex of the qXfer:libraries-svr4:read packet |
| 2506 | is now used to support passing an argument list. The remote stub |
| 2507 | reports support for this argument list to GDB's qSupported query. |
| 2508 | The defined arguments are "start" and "prev", used to reduce work |
| 2509 | necessary for library list updating, resulting in significant |
| 2510 | speedup. |
| 2511 | |
| 2512 | * New features in the GDB remote stub, GDBserver |
| 2513 | |
| 2514 | ** GDBserver now supports target-assisted range stepping. Currently |
| 2515 | enabled on x86/x86_64 GNU/Linux targets. |
| 2516 | |
| 2517 | ** GDBserver now adds element 'tvar' in the XML in the reply to |
| 2518 | 'qXfer:traceframe-info:read'. It has the id of the collected |
| 2519 | trace state variables. |
| 2520 | |
| 2521 | ** GDBserver now supports hardware watchpoints on the MIPS GNU/Linux |
| 2522 | target. |
| 2523 | |
| 2524 | * New 'z' formatter for printing and examining memory, this displays the |
| 2525 | value as hexadecimal zero padded on the left to the size of the type. |
| 2526 | |
| 2527 | * GDB can now use Windows x64 unwinding data. |
| 2528 | |
| 2529 | * The "set remotebaud" command has been replaced by "set serial baud". |
| 2530 | Similarly, "show remotebaud" has been replaced by "show serial baud". |
| 2531 | The "set remotebaud" and "show remotebaud" commands are still available |
| 2532 | to provide backward compatibility with older versions of GDB. |
| 2533 | |
| 2534 | *** Changes in GDB 7.6 |
| 2535 | |
| 2536 | * Target record has been renamed to record-full. |
| 2537 | Record/replay is now enabled with the "record full" command. |
| 2538 | This also affects settings that are associated with full record/replay |
| 2539 | that have been moved from "set/show record" to "set/show record full": |
| 2540 | |
| 2541 | set|show record full insn-number-max |
| 2542 | set|show record full stop-at-limit |
| 2543 | set|show record full memory-query |
| 2544 | |
| 2545 | * A new record target "record-btrace" has been added. The new target |
| 2546 | uses hardware support to record the control-flow of a process. It |
| 2547 | does not support replaying the execution, but it implements the |
| 2548 | below new commands for investigating the recorded execution log. |
| 2549 | This new recording method can be enabled using: |
| 2550 | |
| 2551 | record btrace |
| 2552 | |
| 2553 | The "record-btrace" target is only available on Intel Atom processors |
| 2554 | and requires a Linux kernel 2.6.32 or later. |
| 2555 | |
| 2556 | * Two new commands have been added for record/replay to give information |
| 2557 | about the recorded execution without having to replay the execution. |
| 2558 | The commands are only supported by "record btrace". |
| 2559 | |
| 2560 | record instruction-history prints the execution history at |
| 2561 | instruction granularity |
| 2562 | |
| 2563 | record function-call-history prints the execution history at |
| 2564 | function granularity |
| 2565 | |
| 2566 | * New native configurations |
| 2567 | |
| 2568 | ARM AArch64 GNU/Linux aarch64*-*-linux-gnu |
| 2569 | FreeBSD/powerpc powerpc*-*-freebsd |
| 2570 | x86_64/Cygwin x86_64-*-cygwin* |
| 2571 | Tilera TILE-Gx GNU/Linux tilegx*-*-linux-gnu |
| 2572 | |
| 2573 | * New targets |
| 2574 | |
| 2575 | ARM AArch64 aarch64*-*-elf |
| 2576 | ARM AArch64 GNU/Linux aarch64*-*-linux |
| 2577 | Lynx 178 PowerPC powerpc-*-lynx*178 |
| 2578 | x86_64/Cygwin x86_64-*-cygwin* |
| 2579 | Tilera TILE-Gx GNU/Linux tilegx*-*-linux |
| 2580 | |
| 2581 | * If the configured location of system.gdbinit file (as given by the |
| 2582 | --with-system-gdbinit option at configure time) is in the |
| 2583 | data-directory (as specified by --with-gdb-datadir at configure |
| 2584 | time) or in one of its subdirectories, then GDB will look for the |
| 2585 | system-wide init file in the directory specified by the |
| 2586 | --data-directory command-line option. |
| 2587 | |
| 2588 | * New command line options: |
| 2589 | |
| 2590 | -nh Disables auto-loading of ~/.gdbinit, but still executes all the |
| 2591 | other initialization files, unlike -nx which disables all of them. |
| 2592 | |
| 2593 | * Removed command line options |
| 2594 | |
| 2595 | -epoch This was used by the gdb mode in Epoch, an ancient fork of |
| 2596 | Emacs. |
| 2597 | |
| 2598 | * The 'ptype' and 'whatis' commands now accept an argument to control |
| 2599 | type formatting. |
| 2600 | |
| 2601 | * 'info proc' now works on some core files. |
| 2602 | |
| 2603 | * Python scripting |
| 2604 | |
| 2605 | ** Vectors can be created with gdb.Type.vector. |
| 2606 | |
| 2607 | ** Python's atexit.register now works in GDB. |
| 2608 | |
| 2609 | ** Types can be pretty-printed via a Python API. |
| 2610 | |
| 2611 | ** Python 3 is now supported (in addition to Python 2.4 or later) |
| 2612 | |
| 2613 | ** New class gdb.Architecture exposes GDB's internal representation |
| 2614 | of architecture in the Python API. |
| 2615 | |
| 2616 | ** New method Frame.architecture returns the gdb.Architecture object |
| 2617 | corresponding to the frame's architecture. |
| 2618 | |
| 2619 | * New Python-based convenience functions: |
| 2620 | |
| 2621 | ** $_memeq(buf1, buf2, length) |
| 2622 | ** $_streq(str1, str2) |
| 2623 | ** $_strlen(str) |
| 2624 | ** $_regex(str, regex) |
| 2625 | |
| 2626 | * The 'cd' command now defaults to using '~' (the home directory) if not |
| 2627 | given an argument. |
| 2628 | |
| 2629 | * The C++ ABI now defaults to the GNU v3 ABI. This has been the |
| 2630 | default for GCC since November 2000. |
| 2631 | |
| 2632 | * The command 'forward-search' can now be abbreviated as 'fo'. |
| 2633 | |
| 2634 | * The command 'info tracepoints' can now display 'installed on target' |
| 2635 | or 'not installed on target' for each non-pending location of tracepoint. |
| 2636 | |
| 2637 | * New configure options |
| 2638 | |
| 2639 | --enable-libmcheck/--disable-libmcheck |
| 2640 | By default, development versions are built with -lmcheck on hosts |
| 2641 | that support it, in order to help track memory corruption issues. |
| 2642 | Release versions, on the other hand, are built without -lmcheck |
| 2643 | by default. The --enable-libmcheck/--disable-libmcheck configure |
| 2644 | options allow the user to override that default. |
| 2645 | --with-babeltrace/--with-babeltrace-include/--with-babeltrace-lib |
| 2646 | This configure option allows the user to build GDB with |
| 2647 | libbabeltrace using which GDB can read Common Trace Format data. |
| 2648 | |
| 2649 | * New commands (for set/show, see "New options" below) |
| 2650 | |
| 2651 | catch signal |
| 2652 | Catch signals. This is similar to "handle", but allows commands and |
| 2653 | conditions to be attached. |
| 2654 | |
| 2655 | maint info bfds |
| 2656 | List the BFDs known to GDB. |
| 2657 | |
| 2658 | python-interactive [command] |
| 2659 | pi [command] |
| 2660 | Start a Python interactive prompt, or evaluate the optional command |
| 2661 | and print the result of expressions. |
| 2662 | |
| 2663 | py [command] |
| 2664 | "py" is a new alias for "python". |
| 2665 | |
| 2666 | enable type-printer [name]... |
| 2667 | disable type-printer [name]... |
| 2668 | Enable or disable type printers. |
| 2669 | |
| 2670 | * Removed commands |
| 2671 | |
| 2672 | ** For the Renesas Super-H architecture, the "regs" command has been removed |
| 2673 | (has been deprecated in GDB 7.5), and "info all-registers" should be used |
| 2674 | instead. |
| 2675 | |
| 2676 | * New options |
| 2677 | |
| 2678 | set print type methods (on|off) |
| 2679 | show print type methods |
| 2680 | Control whether method declarations are displayed by "ptype". |
| 2681 | The default is to show them. |
| 2682 | |
| 2683 | set print type typedefs (on|off) |
| 2684 | show print type typedefs |
| 2685 | Control whether typedef definitions are displayed by "ptype". |
| 2686 | The default is to show them. |
| 2687 | |
| 2688 | set filename-display basename|relative|absolute |
| 2689 | show filename-display |
| 2690 | Control the way in which filenames is displayed. |
| 2691 | The default is "relative", which preserves previous behavior. |
| 2692 | |
| 2693 | set trace-buffer-size |
| 2694 | show trace-buffer-size |
| 2695 | Request target to change the size of trace buffer. |
| 2696 | |
| 2697 | set remote trace-buffer-size-packet auto|on|off |
| 2698 | show remote trace-buffer-size-packet |
| 2699 | Control the use of the remote protocol `QTBuffer:size' packet. |
| 2700 | |
| 2701 | set debug aarch64 |
| 2702 | show debug aarch64 |
| 2703 | Control display of debugging messages related to ARM AArch64. |
| 2704 | The default is off. |
| 2705 | |
| 2706 | set debug coff-pe-read |
| 2707 | show debug coff-pe-read |
| 2708 | Control display of debugging messages related to reading of COFF/PE |
| 2709 | exported symbols. |
| 2710 | |
| 2711 | set debug mach-o |
| 2712 | show debug mach-o |
| 2713 | Control display of debugging messages related to Mach-O symbols |
| 2714 | processing. |
| 2715 | |
| 2716 | set debug notification |
| 2717 | show debug notification |
| 2718 | Control display of debugging info for async remote notification. |
| 2719 | |
| 2720 | * MI changes |
| 2721 | |
| 2722 | ** Command parameter changes are now notified using new async record |
| 2723 | "=cmd-param-changed". |
| 2724 | ** Trace frame changes caused by command "tfind" are now notified using |
| 2725 | new async record "=traceframe-changed". |
| 2726 | ** The creation, deletion and modification of trace state variables |
| 2727 | are now notified using new async records "=tsv-created", |
| 2728 | "=tsv-deleted" and "=tsv-modified". |
| 2729 | ** The start and stop of process record are now notified using new |
| 2730 | async record "=record-started" and "=record-stopped". |
| 2731 | ** Memory changes are now notified using new async record |
| 2732 | "=memory-changed". |
| 2733 | ** The data-disassemble command response will include a "fullname" field |
| 2734 | containing the absolute file name when source has been requested. |
| 2735 | ** New optional parameter COUNT added to the "-data-write-memory-bytes" |
| 2736 | command, to allow pattern filling of memory areas. |
| 2737 | ** New commands "-catch-load"/"-catch-unload" added for intercepting |
| 2738 | library load/unload events. |
| 2739 | ** The response to breakpoint commands and breakpoint async records |
| 2740 | includes an "installed" field containing a boolean state about each |
| 2741 | non-pending tracepoint location is whether installed on target or not. |
| 2742 | ** Output of the "-trace-status" command includes a "trace-file" field |
| 2743 | containing the name of the trace file being examined. This field is |
| 2744 | optional, and only present when examining a trace file. |
| 2745 | ** The "fullname" field is now always present along with the "file" field, |
| 2746 | even if the file cannot be found by GDB. |
| 2747 | |
| 2748 | * GDB now supports the "mini debuginfo" section, .gnu_debugdata. |
| 2749 | You must have the LZMA library available when configuring GDB for this |
| 2750 | feature to be enabled. For more information, see: |
| 2751 | http://fedoraproject.org/wiki/Features/MiniDebugInfo |
| 2752 | |
| 2753 | * New remote packets |
| 2754 | |
| 2755 | QTBuffer:size |
| 2756 | Set the size of trace buffer. The remote stub reports support for this |
| 2757 | packet to gdb's qSupported query. |
| 2758 | |
| 2759 | Qbtrace:bts |
| 2760 | Enable Branch Trace Store (BTS)-based branch tracing for the current |
| 2761 | thread. The remote stub reports support for this packet to gdb's |
| 2762 | qSupported query. |
| 2763 | |
| 2764 | Qbtrace:off |
| 2765 | Disable branch tracing for the current thread. The remote stub reports |
| 2766 | support for this packet to gdb's qSupported query. |
| 2767 | |
| 2768 | qXfer:btrace:read |
| 2769 | Read the traced branches for the current thread. The remote stub |
| 2770 | reports support for this packet to gdb's qSupported query. |
| 2771 | |
| 2772 | *** Changes in GDB 7.5 |
| 2773 | |
| 2774 | * GDB now supports x32 ABI. Visit <http://sites.google.com/site/x32abi/> |
| 2775 | for more x32 ABI info. |
| 2776 | |
| 2777 | * GDB now supports access to MIPS DSP registers on Linux targets. |
| 2778 | |
| 2779 | * GDB now supports debugging microMIPS binaries. |
| 2780 | |
| 2781 | * The "info os" command on GNU/Linux can now display information on |
| 2782 | several new classes of objects managed by the operating system: |
| 2783 | "info os procgroups" lists process groups |
| 2784 | "info os files" lists file descriptors |
| 2785 | "info os sockets" lists internet-domain sockets |
| 2786 | "info os shm" lists shared-memory regions |
| 2787 | "info os semaphores" lists semaphores |
| 2788 | "info os msg" lists message queues |
| 2789 | "info os modules" lists loaded kernel modules |
| 2790 | |
| 2791 | * GDB now has support for SDT (Static Defined Tracing) probes. Currently, |
| 2792 | the only implemented backend is for SystemTap probes (<sys/sdt.h>). You |
| 2793 | can set a breakpoint using the new "-probe, "-pstap" or "-probe-stap" |
| 2794 | options and inspect the probe arguments using the new $_probe_arg family |
| 2795 | of convenience variables. You can obtain more information about SystemTap |
| 2796 | in <http://sourceware.org/systemtap/>. |
| 2797 | |
| 2798 | * GDB now supports reversible debugging on ARM, it allows you to |
| 2799 | debug basic ARM and THUMB instructions, and provides |
| 2800 | record/replay support. |
| 2801 | |
| 2802 | * The option "symbol-reloading" has been deleted as it is no longer used. |
| 2803 | |
| 2804 | * Python scripting |
| 2805 | |
| 2806 | ** GDB commands implemented in Python can now be put in command class |
| 2807 | "gdb.COMMAND_USER". |
| 2808 | |
| 2809 | ** The "maint set python print-stack on|off" is now deleted. |
| 2810 | |
| 2811 | ** A new class, gdb.printing.FlagEnumerationPrinter, can be used to |
| 2812 | apply "flag enum"-style pretty-printing to any enum. |
| 2813 | |
| 2814 | ** gdb.lookup_symbol can now work when there is no current frame. |
| 2815 | |
| 2816 | ** gdb.Symbol now has a 'line' attribute, holding the line number in |
| 2817 | the source at which the symbol was defined. |
| 2818 | |
| 2819 | ** gdb.Symbol now has the new attribute 'needs_frame' and the new |
| 2820 | method 'value'. The former indicates whether the symbol needs a |
| 2821 | frame in order to compute its value, and the latter computes the |
| 2822 | symbol's value. |
| 2823 | |
| 2824 | ** A new method 'referenced_value' on gdb.Value objects which can |
| 2825 | dereference pointer as well as C++ reference values. |
| 2826 | |
| 2827 | ** New methods 'global_block' and 'static_block' on gdb.Symtab objects |
| 2828 | which return the global and static blocks (as gdb.Block objects), |
| 2829 | of the underlying symbol table, respectively. |
| 2830 | |
| 2831 | ** New function gdb.find_pc_line which returns the gdb.Symtab_and_line |
| 2832 | object associated with a PC value. |
| 2833 | |
| 2834 | ** gdb.Symtab_and_line has new attribute 'last' which holds the end |
| 2835 | of the address range occupied by code for the current source line. |
| 2836 | |
| 2837 | * Go language support. |
| 2838 | GDB now supports debugging programs written in the Go programming |
| 2839 | language. |
| 2840 | |
| 2841 | * GDBserver now supports stdio connections. |
| 2842 | E.g. (gdb) target remote | ssh myhost gdbserver - hello |
| 2843 | |
| 2844 | * The binary "gdbtui" can no longer be built or installed. |
| 2845 | Use "gdb -tui" instead. |
| 2846 | |
| 2847 | * GDB will now print "flag" enums specially. A flag enum is one where |
| 2848 | all the enumerator values have no bits in common when pairwise |
| 2849 | "and"ed. When printing a value whose type is a flag enum, GDB will |
| 2850 | show all the constants, e.g., for enum E { ONE = 1, TWO = 2}: |
| 2851 | (gdb) print (enum E) 3 |
| 2852 | $1 = (ONE | TWO) |
| 2853 | |
| 2854 | * The filename part of a linespec will now match trailing components |
| 2855 | of a source file name. For example, "break gcc/expr.c:1000" will |
| 2856 | now set a breakpoint in build/gcc/expr.c, but not |
| 2857 | build/libcpp/expr.c. |
| 2858 | |
| 2859 | * The "info proc" and "generate-core-file" commands will now also |
| 2860 | work on remote targets connected to GDBserver on Linux. |
| 2861 | |
| 2862 | * The command "info catch" has been removed. It has been disabled |
| 2863 | since December 2007. |
| 2864 | |
| 2865 | * The "catch exception" and "catch assert" commands now accept |
| 2866 | a condition at the end of the command, much like the "break" |
| 2867 | command does. For instance: |
| 2868 | |
| 2869 | (gdb) catch exception Constraint_Error if Barrier = True |
| 2870 | |
| 2871 | Previously, it was possible to add a condition to such catchpoints, |
| 2872 | but it had to be done as a second step, after the catchpoint had been |
| 2873 | created, using the "condition" command. |
| 2874 | |
| 2875 | * The "info static-tracepoint-marker" command will now also work on |
| 2876 | native Linux targets with in-process agent. |
| 2877 | |
| 2878 | * GDB can now set breakpoints on inlined functions. |
| 2879 | |
| 2880 | * The .gdb_index section has been updated to include symbols for |
| 2881 | inlined functions. GDB will ignore older .gdb_index sections by |
| 2882 | default, which could cause symbol files to be loaded more slowly |
| 2883 | until their .gdb_index sections can be recreated. The new command |
| 2884 | "set use-deprecated-index-sections on" will cause GDB to use any older |
| 2885 | .gdb_index sections it finds. This will restore performance, but the |
| 2886 | ability to set breakpoints on inlined functions will be lost in symbol |
| 2887 | files with older .gdb_index sections. |
| 2888 | |
| 2889 | The .gdb_index section has also been updated to record more information |
| 2890 | about each symbol. This speeds up the "info variables", "info functions" |
| 2891 | and "info types" commands when used with programs having the .gdb_index |
| 2892 | section, as well as speeding up debugging with shared libraries using |
| 2893 | the .gdb_index section. |
| 2894 | |
| 2895 | * Ada support for GDB/MI Variable Objects has been added. |
| 2896 | |
| 2897 | * GDB can now support 'breakpoint always-inserted mode' in 'record' |
| 2898 | target. |
| 2899 | |
| 2900 | * MI changes |
| 2901 | |
| 2902 | ** New command -info-os is the MI equivalent of "info os". |
| 2903 | |
| 2904 | ** Output logs ("set logging" and related) now include MI output. |
| 2905 | |
| 2906 | * New commands |
| 2907 | |
| 2908 | ** "set use-deprecated-index-sections on|off" |
| 2909 | "show use-deprecated-index-sections on|off" |
| 2910 | Controls the use of deprecated .gdb_index sections. |
| 2911 | |
| 2912 | ** "catch load" and "catch unload" can be used to stop when a shared |
| 2913 | library is loaded or unloaded, respectively. |
| 2914 | |
| 2915 | ** "enable count" can be used to auto-disable a breakpoint after |
| 2916 | several hits. |
| 2917 | |
| 2918 | ** "info vtbl" can be used to show the virtual method tables for |
| 2919 | C++ and Java objects. |
| 2920 | |
| 2921 | ** "explore" and its sub commands "explore value" and "explore type" |
| 2922 | can be used to recursively explore values and types of |
| 2923 | expressions. These commands are available only if GDB is |
| 2924 | configured with '--with-python'. |
| 2925 | |
| 2926 | ** "info auto-load" shows status of all kinds of auto-loaded files, |
| 2927 | "info auto-load gdb-scripts" shows status of auto-loading GDB canned |
| 2928 | sequences of commands files, "info auto-load python-scripts" |
| 2929 | shows status of auto-loading Python script files, |
| 2930 | "info auto-load local-gdbinit" shows status of loading init file |
| 2931 | (.gdbinit) from current directory and "info auto-load libthread-db" shows |
| 2932 | status of inferior specific thread debugging shared library loading. |
| 2933 | |
| 2934 | ** "info auto-load-scripts", "set auto-load-scripts on|off" |
| 2935 | and "show auto-load-scripts" commands have been deprecated, use their |
| 2936 | "info auto-load python-scripts", "set auto-load python-scripts on|off" |
| 2937 | and "show auto-load python-scripts" counterparts instead. |
| 2938 | |
| 2939 | ** "dprintf location,format,args..." creates a dynamic printf, which |
| 2940 | is basically a breakpoint that does a printf and immediately |
| 2941 | resumes your program's execution, so it is like a printf that you |
| 2942 | can insert dynamically at runtime instead of at compiletime. |
| 2943 | |
| 2944 | ** "set print symbol" |
| 2945 | "show print symbol" |
| 2946 | Controls whether GDB attempts to display the symbol, if any, |
| 2947 | corresponding to addresses it prints. This defaults to "on", but |
| 2948 | you can set it to "off" to restore GDB's previous behavior. |
| 2949 | |
| 2950 | * Deprecated commands |
| 2951 | |
| 2952 | ** For the Renesas Super-H architecture, the "regs" command has been |
| 2953 | deprecated, and "info all-registers" should be used instead. |
| 2954 | |
| 2955 | * New targets |
| 2956 | |
| 2957 | Renesas RL78 rl78-*-elf |
| 2958 | HP OpenVMS ia64 ia64-hp-openvms* |
| 2959 | |
| 2960 | * GDBserver supports evaluation of breakpoint conditions. When |
| 2961 | support is advertised by GDBserver, GDB may be told to send the |
| 2962 | breakpoint conditions in bytecode form to GDBserver. GDBserver |
| 2963 | will only report the breakpoint trigger to GDB when its condition |
| 2964 | evaluates to true. |
| 2965 | |
| 2966 | * New options |
| 2967 | |
| 2968 | set mips compression |
| 2969 | show mips compression |
| 2970 | Select the compressed ISA encoding used in functions that have no symbol |
| 2971 | information available. The encoding can be set to either of: |
| 2972 | mips16 |
| 2973 | micromips |
| 2974 | and is updated automatically from ELF file flags if available. |
| 2975 | |
| 2976 | set breakpoint condition-evaluation |
| 2977 | show breakpoint condition-evaluation |
| 2978 | Control whether breakpoint conditions are evaluated by GDB ("host") or by |
| 2979 | GDBserver ("target"). Default option "auto" chooses the most efficient |
| 2980 | available mode. |
| 2981 | This option can improve debugger efficiency depending on the speed of the |
| 2982 | target. |
| 2983 | |
| 2984 | set auto-load off |
| 2985 | Disable auto-loading globally. |
| 2986 | |
| 2987 | show auto-load |
| 2988 | Show auto-loading setting of all kinds of auto-loaded files. |
| 2989 | |
| 2990 | set auto-load gdb-scripts on|off |
| 2991 | show auto-load gdb-scripts |
| 2992 | Control auto-loading of GDB canned sequences of commands files. |
| 2993 | |
| 2994 | set auto-load python-scripts on|off |
| 2995 | show auto-load python-scripts |
| 2996 | Control auto-loading of Python script files. |
| 2997 | |
| 2998 | set auto-load local-gdbinit on|off |
| 2999 | show auto-load local-gdbinit |
| 3000 | Control loading of init file (.gdbinit) from current directory. |
| 3001 | |
| 3002 | set auto-load libthread-db on|off |
| 3003 | show auto-load libthread-db |
| 3004 | Control auto-loading of inferior specific thread debugging shared library. |
| 3005 | |
| 3006 | set auto-load scripts-directory <dir1>[:<dir2>...] |
| 3007 | show auto-load scripts-directory |
| 3008 | Set a list of directories from which to load auto-loaded scripts. |
| 3009 | Automatically loaded Python scripts and GDB scripts are located in one |
| 3010 | of the directories listed by this option. |
| 3011 | The delimiter (':' above) may differ according to the host platform. |
| 3012 | |
| 3013 | set auto-load safe-path <dir1>[:<dir2>...] |
| 3014 | show auto-load safe-path |
| 3015 | Set a list of directories from which it is safe to auto-load files. |
| 3016 | The delimiter (':' above) may differ according to the host platform. |
| 3017 | |
| 3018 | set debug auto-load on|off |
| 3019 | show debug auto-load |
| 3020 | Control display of debugging info for auto-loading the files above. |
| 3021 | |
| 3022 | set dprintf-style gdb|call|agent |
| 3023 | show dprintf-style |
| 3024 | Control the way in which a dynamic printf is performed; "gdb" |
| 3025 | requests a GDB printf command, while "call" causes dprintf to call a |
| 3026 | function in the inferior. "agent" requests that the target agent |
| 3027 | (such as GDBserver) do the printing. |
| 3028 | |
| 3029 | set dprintf-function <expr> |
| 3030 | show dprintf-function |
| 3031 | set dprintf-channel <expr> |
| 3032 | show dprintf-channel |
| 3033 | Set the function and optional first argument to the call when using |
| 3034 | the "call" style of dynamic printf. |
| 3035 | |
| 3036 | set disconnected-dprintf on|off |
| 3037 | show disconnected-dprintf |
| 3038 | Control whether agent-style dynamic printfs continue to be in effect |
| 3039 | after GDB disconnects. |
| 3040 | |
| 3041 | * New configure options |
| 3042 | |
| 3043 | --with-auto-load-dir |
| 3044 | Configure default value for the 'set auto-load scripts-directory' |
| 3045 | setting above. It defaults to '$debugdir:$datadir/auto-load', |
| 3046 | $debugdir representing global debugging info directories (available |
| 3047 | via 'show debug-file-directory') and $datadir representing GDB's data |
| 3048 | directory (available via 'show data-directory'). |
| 3049 | |
| 3050 | --with-auto-load-safe-path |
| 3051 | Configure default value for the 'set auto-load safe-path' setting |
| 3052 | above. It defaults to the --with-auto-load-dir setting. |
| 3053 | |
| 3054 | --without-auto-load-safe-path |
| 3055 | Set 'set auto-load safe-path' to '/', effectively disabling this |
| 3056 | security feature. |
| 3057 | |
| 3058 | * New remote packets |
| 3059 | |
| 3060 | z0/z1 conditional breakpoints extension |
| 3061 | |
| 3062 | The z0/z1 breakpoint insertion packets have been extended to carry |
| 3063 | a list of conditional expressions over to the remote stub depending on the |
| 3064 | condition evaluation mode. The use of this extension can be controlled |
| 3065 | via the "set remote conditional-breakpoints-packet" command. |
| 3066 | |
| 3067 | QProgramSignals: |
| 3068 | |
| 3069 | Specify the signals which the remote stub may pass to the debugged |
| 3070 | program without GDB involvement. |
| 3071 | |
| 3072 | * New command line options |
| 3073 | |
| 3074 | --init-command=FILE, -ix Like --command, -x but execute it |
| 3075 | before loading inferior. |
| 3076 | --init-eval-command=COMMAND, -iex Like --eval-command=COMMAND, -ex but |
| 3077 | execute it before loading inferior. |
| 3078 | |
| 3079 | *** Changes in GDB 7.4 |
| 3080 | |
| 3081 | * GDB now handles ambiguous linespecs more consistently; the existing |
| 3082 | FILE:LINE support has been expanded to other types of linespecs. A |
| 3083 | breakpoint will now be set on all matching locations in all |
| 3084 | inferiors, and locations will be added or removed according to |
| 3085 | inferior changes. |
| 3086 | |
| 3087 | * GDB now allows you to skip uninteresting functions and files when |
| 3088 | stepping with the "skip function" and "skip file" commands. |
| 3089 | |
| 3090 | * GDB has two new commands: "set remote hardware-watchpoint-length-limit" |
| 3091 | and "show remote hardware-watchpoint-length-limit". These allows to |
| 3092 | set or show the maximum length limit (in bytes) of a remote |
| 3093 | target hardware watchpoint. |
| 3094 | |
| 3095 | This allows e.g. to use "unlimited" hardware watchpoints with the |
| 3096 | gdbserver integrated in Valgrind version >= 3.7.0. Such Valgrind |
| 3097 | watchpoints are slower than real hardware watchpoints but are |
| 3098 | significantly faster than gdb software watchpoints. |
| 3099 | |
| 3100 | * Python scripting |
| 3101 | |
| 3102 | ** The register_pretty_printer function in module gdb.printing now takes |
| 3103 | an optional `replace' argument. If True, the new printer replaces any |
| 3104 | existing one. |
| 3105 | |
| 3106 | ** The "maint set python print-stack on|off" command has been |
| 3107 | deprecated and will be deleted in GDB 7.5. |
| 3108 | A new command: "set python print-stack none|full|message" has |
| 3109 | replaced it. Additionally, the default for "print-stack" is |
| 3110 | now "message", which just prints the error message without |
| 3111 | the stack trace. |
| 3112 | |
| 3113 | ** A prompt substitution hook (prompt_hook) is now available to the |
| 3114 | Python API. |
| 3115 | |
| 3116 | ** A new Python module, gdb.prompt has been added to the GDB Python |
| 3117 | modules library. This module provides functionality for |
| 3118 | escape sequences in prompts (used by set/show |
| 3119 | extended-prompt). These escape sequences are replaced by their |
| 3120 | corresponding value. |
| 3121 | |
| 3122 | ** Python commands and convenience-functions located in |
| 3123 | 'data-directory'/python/gdb/command and |
| 3124 | 'data-directory'/python/gdb/function are now automatically loaded |
| 3125 | on GDB start-up. |
| 3126 | |
| 3127 | ** Blocks now provide four new attributes. global_block and |
| 3128 | static_block will return the global and static blocks |
| 3129 | respectively. is_static and is_global are boolean attributes |
| 3130 | that indicate if the block is one of those two types. |
| 3131 | |
| 3132 | ** Symbols now provide the "type" attribute, the type of the symbol. |
| 3133 | |
| 3134 | ** The "gdb.breakpoint" function has been deprecated in favor of |
| 3135 | "gdb.breakpoints". |
| 3136 | |
| 3137 | ** A new class "gdb.FinishBreakpoint" is provided to catch the return |
| 3138 | of a function. This class is based on the "finish" command |
| 3139 | available in the CLI. |
| 3140 | |
| 3141 | ** Type objects for struct and union types now allow access to |
| 3142 | the fields using standard Python dictionary (mapping) methods. |
| 3143 | For example, "some_type['myfield']" now works, as does |
| 3144 | "some_type.items()". |
| 3145 | |
| 3146 | ** A new event "gdb.new_objfile" has been added, triggered by loading a |
| 3147 | new object file. |
| 3148 | |
| 3149 | ** A new function, "deep_items" has been added to the gdb.types |
| 3150 | module in the GDB Python modules library. This function returns |
| 3151 | an iterator over the fields of a struct or union type. Unlike |
| 3152 | the standard Python "iteritems" method, it will recursively traverse |
| 3153 | any anonymous fields. |
| 3154 | |
| 3155 | * MI changes |
| 3156 | |
| 3157 | ** "*stopped" events can report several new "reason"s, such as |
| 3158 | "solib-event". |
| 3159 | |
| 3160 | ** Breakpoint changes are now notified using new async records, like |
| 3161 | "=breakpoint-modified". |
| 3162 | |
| 3163 | ** New command -ada-task-info. |
| 3164 | |
| 3165 | * libthread-db-search-path now supports two special values: $sdir and $pdir. |
| 3166 | $sdir specifies the default system locations of shared libraries. |
| 3167 | $pdir specifies the directory where the libpthread used by the application |
| 3168 | lives. |
| 3169 | |
| 3170 | GDB no longer looks in $sdir and $pdir after it has searched the directories |
| 3171 | mentioned in libthread-db-search-path. If you want to search those |
| 3172 | directories, they must be specified in libthread-db-search-path. |
| 3173 | The default value of libthread-db-search-path on GNU/Linux and Solaris |
| 3174 | systems is now "$sdir:$pdir". |
| 3175 | |
| 3176 | $pdir is not supported by gdbserver, it is currently ignored. |
| 3177 | $sdir is supported by gdbserver. |
| 3178 | |
| 3179 | * New configure option --with-iconv-bin. |
| 3180 | When using the internationalization support like the one in the GNU C |
| 3181 | library, GDB will invoke the "iconv" program to get a list of supported |
| 3182 | character sets. If this program lives in a non-standard location, one can |
| 3183 | use this option to specify where to find it. |
| 3184 | |
| 3185 | * When natively debugging programs on PowerPC BookE processors running |
| 3186 | a Linux kernel version 2.6.34 or later, GDB supports masked hardware |
| 3187 | watchpoints, which specify a mask in addition to an address to watch. |
| 3188 | The mask specifies that some bits of an address (the bits which are |
| 3189 | reset in the mask) should be ignored when matching the address accessed |
| 3190 | by the inferior against the watchpoint address. See the "PowerPC Embedded" |
| 3191 | section in the user manual for more details. |
| 3192 | |
| 3193 | * The new option --once causes GDBserver to stop listening for connections once |
| 3194 | the first connection is made. The listening port used by GDBserver will |
| 3195 | become available after that. |
| 3196 | |
| 3197 | * New commands "info macros" and "alias" have been added. |
| 3198 | |
| 3199 | * New function parameters suffix @entry specifies value of function parameter |
| 3200 | at the time the function got called. Entry values are available only since |
| 3201 | gcc version 4.7. |
| 3202 | |
| 3203 | * New commands |
| 3204 | |
| 3205 | !SHELL COMMAND |
| 3206 | "!" is now an alias of the "shell" command. |
| 3207 | Note that no space is needed between "!" and SHELL COMMAND. |
| 3208 | |
| 3209 | * Changed commands |
| 3210 | |
| 3211 | watch EXPRESSION mask MASK_VALUE |
| 3212 | The watch command now supports the mask argument which allows creation |
| 3213 | of masked watchpoints, if the current architecture supports this feature. |
| 3214 | |
| 3215 | info auto-load-scripts [REGEXP] |
| 3216 | This command was formerly named "maintenance print section-scripts". |
| 3217 | It is now generally useful and is no longer a maintenance-only command. |
| 3218 | |
| 3219 | info macro [-all] [--] MACRO |
| 3220 | The info macro command has new options `-all' and `--'. The first for |
| 3221 | printing all definitions of a macro. The second for explicitly specifying |
| 3222 | the end of arguments and the beginning of the macro name in case the macro |
| 3223 | name starts with a hyphen. |
| 3224 | |
| 3225 | collect[/s] EXPRESSIONS |
| 3226 | The tracepoint collect command now takes an optional modifier "/s" |
| 3227 | that directs it to dereference pointer-to-character types and |
| 3228 | collect the bytes of memory up to a zero byte. The behavior is |
| 3229 | similar to what you see when you use the regular print command on a |
| 3230 | string. An optional integer following the "/s" sets a bound on the |
| 3231 | number of bytes that will be collected. |
| 3232 | |
| 3233 | tstart [NOTES] |
| 3234 | The trace start command now interprets any supplied arguments as a |
| 3235 | note to be recorded with the trace run, with an effect similar to |
| 3236 | setting the variable trace-notes. |
| 3237 | |
| 3238 | tstop [NOTES] |
| 3239 | The trace stop command now interprets any arguments as a note to be |
| 3240 | mentioned along with the tstatus report that the trace was stopped |
| 3241 | with a command. The effect is similar to setting the variable |
| 3242 | trace-stop-notes. |
| 3243 | |
| 3244 | * Tracepoints can now be enabled and disabled at any time after a trace |
| 3245 | experiment has been started using the standard "enable" and "disable" |
| 3246 | commands. It is now possible to start a trace experiment with no enabled |
| 3247 | tracepoints; GDB will display a warning, but will allow the experiment to |
| 3248 | begin, assuming that tracepoints will be enabled as needed while the trace |
| 3249 | is running. |
| 3250 | |
| 3251 | * Fast tracepoints on 32-bit x86-architectures can now be placed at |
| 3252 | locations with 4-byte instructions, when they were previously |
| 3253 | limited to locations with instructions of 5 bytes or longer. |
| 3254 | |
| 3255 | * New options |
| 3256 | |
| 3257 | set debug dwarf2-read |
| 3258 | show debug dwarf2-read |
| 3259 | Turns on or off display of debugging messages related to reading |
| 3260 | DWARF debug info. The default is off. |
| 3261 | |
| 3262 | set debug symtab-create |
| 3263 | show debug symtab-create |
| 3264 | Turns on or off display of debugging messages related to symbol table |
| 3265 | creation. The default is off. |
| 3266 | |
| 3267 | set extended-prompt |
| 3268 | show extended-prompt |
| 3269 | Set the GDB prompt, and allow escape sequences to be inserted to |
| 3270 | display miscellaneous information (see 'help set extended-prompt' |
| 3271 | for the list of sequences). This prompt (and any information |
| 3272 | accessed through the escape sequences) is updated every time the |
| 3273 | prompt is displayed. |
| 3274 | |
| 3275 | set print entry-values (both|compact|default|if-needed|no|only|preferred) |
| 3276 | show print entry-values |
| 3277 | Set printing of frame argument values at function entry. In some cases |
| 3278 | GDB can determine the value of function argument which was passed by the |
| 3279 | function caller, even if the value was modified inside the called function. |
| 3280 | |
| 3281 | set debug entry-values |
| 3282 | show debug entry-values |
| 3283 | Control display of debugging info for determining frame argument values at |
| 3284 | function entry and virtual tail call frames. |
| 3285 | |
| 3286 | set basenames-may-differ |
| 3287 | show basenames-may-differ |
| 3288 | Set whether a source file may have multiple base names. |
| 3289 | (A "base name" is the name of a file with the directory part removed. |
| 3290 | Example: The base name of "/home/user/hello.c" is "hello.c".) |
| 3291 | If set, GDB will canonicalize file names (e.g., expand symlinks) |
| 3292 | before comparing them. Canonicalization is an expensive operation, |
| 3293 | but it allows the same file be known by more than one base name. |
| 3294 | If not set (the default), all source files are assumed to have just |
| 3295 | one base name, and gdb will do file name comparisons more efficiently. |
| 3296 | |
| 3297 | set trace-user |
| 3298 | show trace-user |
| 3299 | set trace-notes |
| 3300 | show trace-notes |
| 3301 | Set a user name and notes for the current and any future trace runs. |
| 3302 | This is useful for long-running and/or disconnected traces, to |
| 3303 | inform others (or yourself) as to who is running the trace, supply |
| 3304 | contact information, or otherwise explain what is going on. |
| 3305 | |
| 3306 | set trace-stop-notes |
| 3307 | show trace-stop-notes |
| 3308 | Set a note attached to the trace run, that is displayed when the |
| 3309 | trace has been stopped by a tstop command. This is useful for |
| 3310 | instance as an explanation, if you are stopping a trace run that was |
| 3311 | started by someone else. |
| 3312 | |
| 3313 | * New remote packets |
| 3314 | |
| 3315 | QTEnable |
| 3316 | |
| 3317 | Dynamically enable a tracepoint in a started trace experiment. |
| 3318 | |
| 3319 | QTDisable |
| 3320 | |
| 3321 | Dynamically disable a tracepoint in a started trace experiment. |
| 3322 | |
| 3323 | QTNotes |
| 3324 | |
| 3325 | Set the user and notes of the trace run. |
| 3326 | |
| 3327 | qTP |
| 3328 | |
| 3329 | Query the current status of a tracepoint. |
| 3330 | |
| 3331 | qTMinFTPILen |
| 3332 | |
| 3333 | Query the minimum length of instruction at which a fast tracepoint may |
| 3334 | be placed. |
| 3335 | |
| 3336 | * Dcache size (number of lines) and line-size are now runtime-configurable |
| 3337 | via "set dcache line" and "set dcache line-size" commands. |
| 3338 | |
| 3339 | * New targets |
| 3340 | |
| 3341 | Texas Instruments TMS320C6x tic6x-*-* |
| 3342 | |
| 3343 | * New Simulators |
| 3344 | |
| 3345 | Renesas RL78 rl78-*-elf |
| 3346 | |
| 3347 | *** Changes in GDB 7.3.1 |
| 3348 | |
| 3349 | * The build failure for NetBSD and OpenBSD targets have now been fixed. |
| 3350 | |
| 3351 | *** Changes in GDB 7.3 |
| 3352 | |
| 3353 | * GDB has a new command: "thread find [REGEXP]". |
| 3354 | It finds the thread id whose name, target id, or thread extra info |
| 3355 | matches the given regular expression. |
| 3356 | |
| 3357 | * The "catch syscall" command now works on mips*-linux* targets. |
| 3358 | |
| 3359 | * The -data-disassemble MI command now supports modes 2 and 3 for |
| 3360 | dumping the instruction opcodes. |
| 3361 | |
| 3362 | * New command line options |
| 3363 | |
| 3364 | -data-directory DIR Specify DIR as the "data-directory". |
| 3365 | This is mostly for testing purposes. |
| 3366 | |
| 3367 | * The "maint set python auto-load on|off" command has been renamed to |
| 3368 | "set auto-load-scripts on|off". |
| 3369 | |
| 3370 | * GDB has a new command: "set directories". |
| 3371 | It is like the "dir" command except that it replaces the |
| 3372 | source path list instead of augmenting it. |
| 3373 | |
| 3374 | * GDB now understands thread names. |
| 3375 | |
| 3376 | On GNU/Linux, "info threads" will display the thread name as set by |
| 3377 | prctl or pthread_setname_np. |
| 3378 | |
| 3379 | There is also a new command, "thread name", which can be used to |
| 3380 | assign a name internally for GDB to display. |
| 3381 | |
| 3382 | * OpenCL C |
| 3383 | Initial support for the OpenCL C language (http://www.khronos.org/opencl) |
| 3384 | has been integrated into GDB. |
| 3385 | |
| 3386 | * Python scripting |
| 3387 | |
| 3388 | ** The function gdb.Write now accepts an optional keyword 'stream'. |
| 3389 | This keyword, when provided, will direct the output to either |
| 3390 | stdout, stderr, or GDB's logging output. |
| 3391 | |
| 3392 | ** Parameters can now be be sub-classed in Python, and in particular |
| 3393 | you may implement the get_set_doc and get_show_doc functions. |
| 3394 | This improves how Parameter set/show documentation is processed |
| 3395 | and allows for more dynamic content. |
| 3396 | |
| 3397 | ** Symbols, Symbol Table, Symbol Table and Line, Object Files, |
| 3398 | Inferior, Inferior Thread, Blocks, and Block Iterator APIs now |
| 3399 | have an is_valid method. |
| 3400 | |
| 3401 | ** Breakpoints can now be sub-classed in Python, and in particular |
| 3402 | you may implement a 'stop' function that is executed each time |
| 3403 | the inferior reaches that breakpoint. |
| 3404 | |
| 3405 | ** New function gdb.lookup_global_symbol looks up a global symbol. |
| 3406 | |
| 3407 | ** GDB values in Python are now callable if the value represents a |
| 3408 | function. For example, if 'some_value' represents a function that |
| 3409 | takes two integer parameters and returns a value, you can call |
| 3410 | that function like so: |
| 3411 | |
| 3412 | result = some_value (10,20) |
| 3413 | |
| 3414 | ** Module gdb.types has been added. |
| 3415 | It contains a collection of utilities for working with gdb.Types objects: |
| 3416 | get_basic_type, has_field, make_enum_dict. |
| 3417 | |
| 3418 | ** Module gdb.printing has been added. |
| 3419 | It contains utilities for writing and registering pretty-printers. |
| 3420 | New classes: PrettyPrinter, SubPrettyPrinter, |
| 3421 | RegexpCollectionPrettyPrinter. |
| 3422 | New function: register_pretty_printer. |
| 3423 | |
| 3424 | ** New commands "info pretty-printers", "enable pretty-printer" and |
| 3425 | "disable pretty-printer" have been added. |
| 3426 | |
| 3427 | ** gdb.parameter("directories") is now available. |
| 3428 | |
| 3429 | ** New function gdb.newest_frame returns the newest frame in the |
| 3430 | selected thread. |
| 3431 | |
| 3432 | ** The gdb.InferiorThread class has a new "name" attribute. This |
| 3433 | holds the thread's name. |
| 3434 | |
| 3435 | ** Python Support for Inferior events. |
| 3436 | Python scripts can add observers to be notified of events |
| 3437 | occurring in the process being debugged. |
| 3438 | The following events are currently supported: |
| 3439 | - gdb.events.cont Continue event. |
| 3440 | - gdb.events.exited Inferior exited event. |
| 3441 | - gdb.events.stop Signal received, and Breakpoint hit events. |
| 3442 | |
| 3443 | * C++ Improvements: |
| 3444 | |
| 3445 | ** GDB now puts template parameters in scope when debugging in an |
| 3446 | instantiation. For example, if you have: |
| 3447 | |
| 3448 | template<int X> int func (void) { return X; } |
| 3449 | |
| 3450 | then if you step into func<5>, "print X" will show "5". This |
| 3451 | feature requires proper debuginfo support from the compiler; it |
| 3452 | was added to GCC 4.5. |
| 3453 | |
| 3454 | ** The motion commands "next", "finish", "until", and "advance" now |
| 3455 | work better when exceptions are thrown. In particular, GDB will |
| 3456 | no longer lose control of the inferior; instead, the GDB will |
| 3457 | stop the inferior at the point at which the exception is caught. |
| 3458 | This functionality requires a change in the exception handling |
| 3459 | code that was introduced in GCC 4.5. |
| 3460 | |
| 3461 | * GDB now follows GCC's rules on accessing volatile objects when |
| 3462 | reading or writing target state during expression evaluation. |
| 3463 | One notable difference to prior behavior is that "print x = 0" |
| 3464 | no longer generates a read of x; the value of the assignment is |
| 3465 | now always taken directly from the value being assigned. |
| 3466 | |
| 3467 | * GDB now has some support for using labels in the program's source in |
| 3468 | linespecs. For instance, you can use "advance label" to continue |
| 3469 | execution to a label. |
| 3470 | |
| 3471 | * GDB now has support for reading and writing a new .gdb_index |
| 3472 | section. This section holds a fast index of DWARF debugging |
| 3473 | information and can be used to greatly speed up GDB startup and |
| 3474 | operation. See the documentation for `save gdb-index' for details. |
| 3475 | |
| 3476 | * The "watch" command now accepts an optional "-location" argument. |
| 3477 | When used, this causes GDB to watch the memory referred to by the |
| 3478 | expression. Such a watchpoint is never deleted due to it going out |
| 3479 | of scope. |
| 3480 | |
| 3481 | * GDB now supports thread debugging of core dumps on GNU/Linux. |
| 3482 | |
| 3483 | GDB now activates thread debugging using the libthread_db library |
| 3484 | when debugging GNU/Linux core dumps, similarly to when debugging |
| 3485 | live processes. As a result, when debugging a core dump file, GDB |
| 3486 | is now able to display pthread_t ids of threads. For example, "info |
| 3487 | threads" shows the same output as when debugging the process when it |
| 3488 | was live. In earlier releases, you'd see something like this: |
| 3489 | |
| 3490 | (gdb) info threads |
| 3491 | * 1 LWP 6780 main () at main.c:10 |
| 3492 | |
| 3493 | While now you see this: |
| 3494 | |
| 3495 | (gdb) info threads |
| 3496 | * 1 Thread 0x7f0f5712a700 (LWP 6780) main () at main.c:10 |
| 3497 | |
| 3498 | It is also now possible to inspect TLS variables when debugging core |
| 3499 | dumps. |
| 3500 | |
| 3501 | When debugging a core dump generated on a machine other than the one |
| 3502 | used to run GDB, you may need to point GDB at the correct |
| 3503 | libthread_db library with the "set libthread-db-search-path" |
| 3504 | command. See the user manual for more details on this command. |
| 3505 | |
| 3506 | * When natively debugging programs on PowerPC BookE processors running |
| 3507 | a Linux kernel version 2.6.34 or later, GDB supports ranged breakpoints, |
| 3508 | which stop execution of the inferior whenever it executes an instruction |
| 3509 | at any address within the specified range. See the "PowerPC Embedded" |
| 3510 | section in the user manual for more details. |
| 3511 | |
| 3512 | * New features in the GDB remote stub, GDBserver |
| 3513 | |
| 3514 | ** GDBserver is now supported on PowerPC LynxOS (versions 4.x and 5.x), |
| 3515 | and i686 LynxOS (version 5.x). |
| 3516 | |
| 3517 | ** GDBserver is now supported on Blackfin Linux. |
| 3518 | |
| 3519 | * New native configurations |
| 3520 | |
| 3521 | ia64 HP-UX ia64-*-hpux* |
| 3522 | |
| 3523 | * New targets: |
| 3524 | |
| 3525 | Analog Devices, Inc. Blackfin Processor bfin-* |
| 3526 | |
| 3527 | * Ada task switching is now supported on sparc-elf targets when |
| 3528 | debugging a program using the Ravenscar Profile. For more information, |
| 3529 | see the "Tasking Support when using the Ravenscar Profile" section |
| 3530 | in the GDB user manual. |
| 3531 | |
| 3532 | * Guile support was removed. |
| 3533 | |
| 3534 | * New features in the GNU simulator |
| 3535 | |
| 3536 | ** The --map-info flag lists all known core mappings. |
| 3537 | |
| 3538 | ** CFI flashes may be simulated via the "cfi" device. |
| 3539 | |
| 3540 | *** Changes in GDB 7.2 |
| 3541 | |
| 3542 | * Shared library support for remote targets by default |
| 3543 | |
| 3544 | When GDB is configured for a generic, non-OS specific target, like |
| 3545 | for example, --target=arm-eabi or one of the many *-*-elf targets, |
| 3546 | GDB now queries remote stubs for loaded shared libraries using the |
| 3547 | `qXfer:libraries:read' packet. Previously, shared library support |
| 3548 | was always disabled for such configurations. |
| 3549 | |
| 3550 | * C++ Improvements: |
| 3551 | |
| 3552 | ** Argument Dependent Lookup (ADL) |
| 3553 | |
| 3554 | In C++ ADL lookup directs function search to the namespaces of its |
| 3555 | arguments even if the namespace has not been imported. |
| 3556 | For example: |
| 3557 | namespace A |
| 3558 | { |
| 3559 | class B { }; |
| 3560 | void foo (B) { } |
| 3561 | } |
| 3562 | ... |
| 3563 | A::B b |
| 3564 | foo(b) |
| 3565 | Here the compiler will search for `foo' in the namespace of 'b' |
| 3566 | and find A::foo. GDB now supports this. This construct is commonly |
| 3567 | used in the Standard Template Library for operators. |
| 3568 | |
| 3569 | ** Improved User Defined Operator Support |
| 3570 | |
| 3571 | In addition to member operators, GDB now supports lookup of operators |
| 3572 | defined in a namespace and imported with a `using' directive, operators |
| 3573 | defined in the global scope, operators imported implicitly from an |
| 3574 | anonymous namespace, and the ADL operators mentioned in the previous |
| 3575 | entry. |
| 3576 | GDB now also supports proper overload resolution for all the previously |
| 3577 | mentioned flavors of operators. |
| 3578 | |
| 3579 | ** static const class members |
| 3580 | |
| 3581 | Printing of static const class members that are initialized in the |
| 3582 | class definition has been fixed. |
| 3583 | |
| 3584 | * Windows Thread Information Block access. |
| 3585 | |
| 3586 | On Windows targets, GDB now supports displaying the Windows Thread |
| 3587 | Information Block (TIB) structure. This structure is visible either |
| 3588 | by using the new command `info w32 thread-information-block' or, by |
| 3589 | dereferencing the new convenience variable named `$_tlb', a |
| 3590 | thread-specific pointer to the TIB. This feature is also supported |
| 3591 | when remote debugging using GDBserver. |
| 3592 | |
| 3593 | * Static tracepoints |
| 3594 | |
| 3595 | Static tracepoints are calls in the user program into a tracing |
| 3596 | library. One such library is a port of the LTTng kernel tracer to |
| 3597 | userspace --- UST (LTTng Userspace Tracer, http://lttng.org/ust). |
| 3598 | When debugging with GDBserver, GDB now supports combining the GDB |
| 3599 | tracepoint machinery with such libraries. For example: the user can |
| 3600 | use GDB to probe a static tracepoint marker (a call from the user |
| 3601 | program into the tracing library) with the new "strace" command (see |
| 3602 | "New commands" below). This creates a "static tracepoint" in the |
| 3603 | breakpoint list, that can be manipulated with the same feature set |
| 3604 | as fast and regular tracepoints. E.g., collect registers, local and |
| 3605 | global variables, collect trace state variables, and define |
| 3606 | tracepoint conditions. In addition, the user can collect extra |
| 3607 | static tracepoint marker specific data, by collecting the new |
| 3608 | $_sdata internal variable. When analyzing the trace buffer, you can |
| 3609 | inspect $_sdata like any other variable available to GDB. For more |
| 3610 | information, see the "Tracepoints" chapter in GDB user manual. New |
| 3611 | remote packets have been defined to support static tracepoints, see |
| 3612 | the "New remote packets" section below. |
| 3613 | |
| 3614 | * Better reconstruction of tracepoints after disconnected tracing |
| 3615 | |
| 3616 | GDB will attempt to download the original source form of tracepoint |
| 3617 | definitions when starting a trace run, and then will upload these |
| 3618 | upon reconnection to the target, resulting in a more accurate |
| 3619 | reconstruction of the tracepoints that are in use on the target. |
| 3620 | |
| 3621 | * Observer mode |
| 3622 | |
| 3623 | You can now exercise direct control over the ways that GDB can |
| 3624 | affect your program. For instance, you can disallow the setting of |
| 3625 | breakpoints, so that the program can run continuously (assuming |
| 3626 | non-stop mode). In addition, the "observer" variable is available |
| 3627 | to switch all of the different controls; in observer mode, GDB |
| 3628 | cannot affect the target's behavior at all, which is useful for |
| 3629 | tasks like diagnosing live systems in the field. |
| 3630 | |
| 3631 | * The new convenience variable $_thread holds the number of the |
| 3632 | current thread. |
| 3633 | |
| 3634 | * New remote packets |
| 3635 | |
| 3636 | qGetTIBAddr |
| 3637 | |
| 3638 | Return the address of the Windows Thread Information Block of a given thread. |
| 3639 | |
| 3640 | qRelocInsn |
| 3641 | |
| 3642 | In response to several of the tracepoint packets, the target may now |
| 3643 | also respond with a number of intermediate `qRelocInsn' request |
| 3644 | packets before the final result packet, to have GDB handle |
| 3645 | relocating an instruction to execute at a different address. This |
| 3646 | is particularly useful for stubs that support fast tracepoints. GDB |
| 3647 | reports support for this feature in the qSupported packet. |
| 3648 | |
| 3649 | qTfSTM, qTsSTM |
| 3650 | |
| 3651 | List static tracepoint markers in the target program. |
| 3652 | |
| 3653 | qTSTMat |
| 3654 | |
| 3655 | List static tracepoint markers at a given address in the target |
| 3656 | program. |
| 3657 | |
| 3658 | qXfer:statictrace:read |
| 3659 | |
| 3660 | Read the static trace data collected (by a `collect $_sdata' |
| 3661 | tracepoint action). The remote stub reports support for this packet |
| 3662 | to gdb's qSupported query. |
| 3663 | |
| 3664 | QAllow |
| 3665 | |
| 3666 | Send the current settings of GDB's permission flags. |
| 3667 | |
| 3668 | QTDPsrc |
| 3669 | |
| 3670 | Send part of the source (textual) form of a tracepoint definition, |
| 3671 | which includes location, conditional, and action list. |
| 3672 | |
| 3673 | * The source command now accepts a -s option to force searching for the |
| 3674 | script in the source search path even if the script name specifies |
| 3675 | a directory. |
| 3676 | |
| 3677 | * New features in the GDB remote stub, GDBserver |
| 3678 | |
| 3679 | - GDBserver now support tracepoints (including fast tracepoints, and |
| 3680 | static tracepoints). The feature is currently supported by the |
| 3681 | i386-linux and amd64-linux builds. See the "Tracepoints support |
| 3682 | in gdbserver" section in the manual for more information. |
| 3683 | |
| 3684 | GDBserver JIT compiles the tracepoint's conditional agent |
| 3685 | expression bytecode into native code whenever possible for low |
| 3686 | overhead dynamic tracepoints conditionals. For such tracepoints, |
| 3687 | an expression that examines program state is evaluated when the |
| 3688 | tracepoint is reached, in order to determine whether to capture |
| 3689 | trace data. If the condition is simple and false, processing the |
| 3690 | tracepoint finishes very quickly and no data is gathered. |
| 3691 | |
| 3692 | GDBserver interfaces with the UST (LTTng Userspace Tracer) library |
| 3693 | for static tracepoints support. |
| 3694 | |
| 3695 | - GDBserver now supports x86_64 Windows 64-bit debugging. |
| 3696 | |
| 3697 | * GDB now sends xmlRegisters= in qSupported packet to indicate that |
| 3698 | it understands register description. |
| 3699 | |
| 3700 | * The --batch flag now disables pagination and queries. |
| 3701 | |
| 3702 | * X86 general purpose registers |
| 3703 | |
| 3704 | GDB now supports reading/writing byte, word and double-word x86 |
| 3705 | general purpose registers directly. This means you can use, say, |
| 3706 | $ah or $ax to refer, respectively, to the byte register AH and |
| 3707 | 16-bit word register AX that are actually portions of the 32-bit |
| 3708 | register EAX or 64-bit register RAX. |
| 3709 | |
| 3710 | * The `commands' command now accepts a range of breakpoints to modify. |
| 3711 | A plain `commands' following a command that creates multiple |
| 3712 | breakpoints affects all the breakpoints set by that command. This |
| 3713 | applies to breakpoints set by `rbreak', and also applies when a |
| 3714 | single `break' command creates multiple breakpoints (e.g., |
| 3715 | breakpoints on overloaded c++ functions). |
| 3716 | |
| 3717 | * The `rbreak' command now accepts a filename specification as part of |
| 3718 | its argument, limiting the functions selected by the regex to those |
| 3719 | in the specified file. |
| 3720 | |
| 3721 | * Support for remote debugging Windows and SymbianOS shared libraries |
| 3722 | from Unix hosts has been improved. Non Windows GDB builds now can |
| 3723 | understand target reported file names that follow MS-DOS based file |
| 3724 | system semantics, such as file names that include drive letters and |
| 3725 | use the backslash character as directory separator. This makes it |
| 3726 | possible to transparently use the "set sysroot" and "set |
| 3727 | solib-search-path" on Unix hosts to point as host copies of the |
| 3728 | target's shared libraries. See the new command "set |
| 3729 | target-file-system-kind" described below, and the "Commands to |
| 3730 | specify files" section in the user manual for more information. |
| 3731 | |
| 3732 | * New commands |
| 3733 | |
| 3734 | eval template, expressions... |
| 3735 | Convert the values of one or more expressions under the control |
| 3736 | of the string template to a command line, and call it. |
| 3737 | |
| 3738 | set target-file-system-kind unix|dos-based|auto |
| 3739 | show target-file-system-kind |
| 3740 | Set or show the assumed file system kind for target reported file |
| 3741 | names. |
| 3742 | |
| 3743 | save breakpoints <filename> |
| 3744 | Save all current breakpoint definitions to a file suitable for use |
| 3745 | in a later debugging session. To read the saved breakpoint |
| 3746 | definitions, use the `source' command. |
| 3747 | |
| 3748 | `save tracepoints' is a new alias for `save-tracepoints'. The latter |
| 3749 | is now deprecated. |
| 3750 | |
| 3751 | info static-tracepoint-markers |
| 3752 | Display information about static tracepoint markers in the target. |
| 3753 | |
| 3754 | strace FN | FILE:LINE | *ADDR | -m MARKER_ID |
| 3755 | Define a static tracepoint by probing a marker at the given |
| 3756 | function, line, address, or marker ID. |
| 3757 | |
| 3758 | set observer on|off |
| 3759 | show observer |
| 3760 | Enable and disable observer mode. |
| 3761 | |
| 3762 | set may-write-registers on|off |
| 3763 | set may-write-memory on|off |
| 3764 | set may-insert-breakpoints on|off |
| 3765 | set may-insert-tracepoints on|off |
| 3766 | set may-insert-fast-tracepoints on|off |
| 3767 | set may-interrupt on|off |
| 3768 | Set individual permissions for GDB effects on the target. Note that |
| 3769 | some of these settings can have undesirable or surprising |
| 3770 | consequences, particularly when changed in the middle of a session. |
| 3771 | For instance, disabling the writing of memory can prevent |
| 3772 | breakpoints from being inserted, cause single-stepping to fail, or |
| 3773 | even crash your program, if you disable after breakpoints have been |
| 3774 | inserted. However, GDB should not crash. |
| 3775 | |
| 3776 | set record memory-query on|off |
| 3777 | show record memory-query |
| 3778 | Control whether to stop the inferior if memory changes caused |
| 3779 | by an instruction cannot be recorded. |
| 3780 | |
| 3781 | * Changed commands |
| 3782 | |
| 3783 | disassemble |
| 3784 | The disassemble command now supports "start,+length" form of two arguments. |
| 3785 | |
| 3786 | * Python scripting |
| 3787 | |
| 3788 | ** GDB now provides a new directory location, called the python directory, |
| 3789 | where Python scripts written for GDB can be installed. The location |
| 3790 | of that directory is <data-directory>/python, where <data-directory> |
| 3791 | is the GDB data directory. For more details, see section `Scripting |
| 3792 | GDB using Python' in the manual. |
| 3793 | |
| 3794 | ** The GDB Python API now has access to breakpoints, symbols, symbol |
| 3795 | tables, program spaces, inferiors, threads and frame's code blocks. |
| 3796 | Additionally, GDB Parameters can now be created from the API, and |
| 3797 | manipulated via set/show in the CLI. |
| 3798 | |
| 3799 | ** New functions gdb.target_charset, gdb.target_wide_charset, |
| 3800 | gdb.progspaces, gdb.current_progspace, and gdb.string_to_argv. |
| 3801 | |
| 3802 | ** New exception gdb.GdbError. |
| 3803 | |
| 3804 | ** Pretty-printers are now also looked up in the current program space. |
| 3805 | |
| 3806 | ** Pretty-printers can now be individually enabled and disabled. |
| 3807 | |
| 3808 | ** GDB now looks for names of Python scripts to auto-load in a |
| 3809 | special section named `.debug_gdb_scripts', in addition to looking |
| 3810 | for a OBJFILE-gdb.py script when OBJFILE is read by the debugger. |
| 3811 | |
| 3812 | * Tracepoint actions were unified with breakpoint commands. In particular, |
| 3813 | there are no longer differences in "info break" output for breakpoints and |
| 3814 | tracepoints and the "commands" command can be used for both tracepoints and |
| 3815 | regular breakpoints. |
| 3816 | |
| 3817 | * New targets |
| 3818 | |
| 3819 | ARM Symbian arm*-*-symbianelf* |
| 3820 | |
| 3821 | * D language support. |
| 3822 | GDB now supports debugging programs written in the D programming |
| 3823 | language. |
| 3824 | |
| 3825 | * GDB now supports the extended ptrace interface for PowerPC which is |
| 3826 | available since Linux kernel version 2.6.34. This automatically enables |
| 3827 | any hardware breakpoints and additional hardware watchpoints available in |
| 3828 | the processor. The old ptrace interface exposes just one hardware |
| 3829 | watchpoint and no hardware breakpoints. |
| 3830 | |
| 3831 | * GDB is now able to use the Data Value Compare (DVC) register available on |
| 3832 | embedded PowerPC processors to implement in hardware simple watchpoint |
| 3833 | conditions of the form: |
| 3834 | |
| 3835 | watch ADDRESS|VARIABLE if ADDRESS|VARIABLE == CONSTANT EXPRESSION |
| 3836 | |
| 3837 | This works in native GDB running on Linux kernels with the extended ptrace |
| 3838 | interface mentioned above. |
| 3839 | |
| 3840 | *** Changes in GDB 7.1 |
| 3841 | |
| 3842 | * C++ Improvements |
| 3843 | |
| 3844 | ** Namespace Support |
| 3845 | |
| 3846 | GDB now supports importing of namespaces in C++. This enables the |
| 3847 | user to inspect variables from imported namespaces. Support for |
| 3848 | namepace aliasing has also been added. So, if a namespace is |
| 3849 | aliased in the current scope (e.g. namepace C=A; ) the user can |
| 3850 | print variables using the alias (e.g. (gdb) print C::x). |
| 3851 | |
| 3852 | ** Bug Fixes |
| 3853 | |
| 3854 | All known bugs relating to the printing of virtual base class were |
| 3855 | fixed. It is now possible to call overloaded static methods using a |
| 3856 | qualified name. |
| 3857 | |
| 3858 | ** Cast Operators |
| 3859 | |
| 3860 | The C++ cast operators static_cast<>, dynamic_cast<>, const_cast<>, |
| 3861 | and reinterpret_cast<> are now handled by the C++ expression parser. |
| 3862 | |
| 3863 | * New targets |
| 3864 | |
| 3865 | Xilinx MicroBlaze microblaze-*-* |
| 3866 | Renesas RX rx-*-elf |
| 3867 | |
| 3868 | * New Simulators |
| 3869 | |
| 3870 | Xilinx MicroBlaze microblaze |
| 3871 | Renesas RX rx |
| 3872 | |
| 3873 | * Multi-program debugging. |
| 3874 | |
| 3875 | GDB now has support for multi-program (a.k.a. multi-executable or |
| 3876 | multi-exec) debugging. This allows for debugging multiple inferiors |
| 3877 | simultaneously each running a different program under the same GDB |
| 3878 | session. See "Debugging Multiple Inferiors and Programs" in the |
| 3879 | manual for more information. This implied some user visible changes |
| 3880 | in the multi-inferior support. For example, "info inferiors" now |
| 3881 | lists inferiors that are not running yet or that have exited |
| 3882 | already. See also "New commands" and "New options" below. |
| 3883 | |
| 3884 | * New tracing features |
| 3885 | |
| 3886 | GDB's tracepoint facility now includes several new features: |
| 3887 | |
| 3888 | ** Trace state variables |
| 3889 | |
| 3890 | GDB tracepoints now include support for trace state variables, which |
| 3891 | are variables managed by the target agent during a tracing |
| 3892 | experiment. They are useful for tracepoints that trigger each |
| 3893 | other, so for instance one tracepoint can count hits in a variable, |
| 3894 | and then a second tracepoint has a condition that is true when the |
| 3895 | count reaches a particular value. Trace state variables share the |
| 3896 | $-syntax of GDB convenience variables, and can appear in both |
| 3897 | tracepoint actions and condition expressions. Use the "tvariable" |
| 3898 | command to create, and "info tvariables" to view; see "Trace State |
| 3899 | Variables" in the manual for more detail. |
| 3900 | |
| 3901 | ** Fast tracepoints |
| 3902 | |
| 3903 | GDB now includes an option for defining fast tracepoints, which |
| 3904 | targets may implement more efficiently, such as by installing a jump |
| 3905 | into the target agent rather than a trap instruction. The resulting |
| 3906 | speedup can be by two orders of magnitude or more, although the |
| 3907 | tradeoff is that some program locations on some target architectures |
| 3908 | might not allow fast tracepoint installation, for instance if the |
| 3909 | instruction to be replaced is shorter than the jump. To request a |
| 3910 | fast tracepoint, use the "ftrace" command, with syntax identical to |
| 3911 | the regular trace command. |
| 3912 | |
| 3913 | ** Disconnected tracing |
| 3914 | |
| 3915 | It is now possible to detach GDB from the target while it is running |
| 3916 | a trace experiment, then reconnect later to see how the experiment |
| 3917 | is going. In addition, a new variable disconnected-tracing lets you |
| 3918 | tell the target agent whether to continue running a trace if the |
| 3919 | connection is lost unexpectedly. |
| 3920 | |
| 3921 | ** Trace files |
| 3922 | |
| 3923 | GDB now has the ability to save the trace buffer into a file, and |
| 3924 | then use that file as a target, similarly to you can do with |
| 3925 | corefiles. You can select trace frames, print data that was |
| 3926 | collected in them, and use tstatus to display the state of the |
| 3927 | tracing run at the moment that it was saved. To create a trace |
| 3928 | file, use "tsave <filename>", and to use it, do "target tfile |
| 3929 | <name>". |
| 3930 | |
| 3931 | ** Circular trace buffer |
| 3932 | |
| 3933 | You can ask the target agent to handle the trace buffer as a |
| 3934 | circular buffer, discarding the oldest trace frames to make room for |
| 3935 | newer ones, by setting circular-trace-buffer to on. This feature may |
| 3936 | not be available for all target agents. |
| 3937 | |
| 3938 | * Changed commands |
| 3939 | |
| 3940 | disassemble |
| 3941 | The disassemble command, when invoked with two arguments, now requires |
| 3942 | the arguments to be comma-separated. |
| 3943 | |
| 3944 | info variables |
| 3945 | The info variables command now displays variable definitions. Files |
| 3946 | which only declare a variable are not shown. |
| 3947 | |
| 3948 | source |
| 3949 | The source command is now capable of sourcing Python scripts. |
| 3950 | This feature is dependent on the debugger being build with Python |
| 3951 | support. |
| 3952 | |
| 3953 | Related to this enhancement is also the introduction of a new command |
| 3954 | "set script-extension" (see below). |
| 3955 | |
| 3956 | * New commands (for set/show, see "New options" below) |
| 3957 | |
| 3958 | record save [<FILENAME>] |
| 3959 | Save a file (in core file format) containing the process record |
| 3960 | execution log for replay debugging at a later time. |
| 3961 | |
| 3962 | record restore <FILENAME> |
| 3963 | Restore the process record execution log that was saved at an |
| 3964 | earlier time, for replay debugging. |
| 3965 | |
| 3966 | add-inferior [-copies <N>] [-exec <FILENAME>] |
| 3967 | Add a new inferior. |
| 3968 | |
| 3969 | clone-inferior [-copies <N>] [ID] |
| 3970 | Make a new inferior ready to execute the same program another |
| 3971 | inferior has loaded. |
| 3972 | |
| 3973 | remove-inferior ID |
| 3974 | Remove an inferior. |
| 3975 | |
| 3976 | maint info program-spaces |
| 3977 | List the program spaces loaded into GDB. |
| 3978 | |
| 3979 | set remote interrupt-sequence [Ctrl-C | BREAK | BREAK-g] |
| 3980 | show remote interrupt-sequence |
| 3981 | Allow the user to select one of ^C, a BREAK signal or BREAK-g |
| 3982 | as the sequence to the remote target in order to interrupt the execution. |
| 3983 | Ctrl-C is a default. Some system prefers BREAK which is high level of |
| 3984 | serial line for some certain time. Linux kernel prefers BREAK-g, a.k.a |
| 3985 | Magic SysRq g. It is BREAK signal and character 'g'. |
| 3986 | |
| 3987 | set remote interrupt-on-connect [on | off] |
| 3988 | show remote interrupt-on-connect |
| 3989 | When interrupt-on-connect is ON, gdb sends interrupt-sequence to |
| 3990 | remote target when gdb connects to it. This is needed when you debug |
| 3991 | Linux kernel. |
| 3992 | |
| 3993 | set remotebreak [on | off] |
| 3994 | show remotebreak |
| 3995 | Deprecated. Use "set/show remote interrupt-sequence" instead. |
| 3996 | |
| 3997 | tvariable $NAME [ = EXP ] |
| 3998 | Create or modify a trace state variable. |
| 3999 | |
| 4000 | info tvariables |
| 4001 | List trace state variables and their values. |
| 4002 | |
| 4003 | delete tvariable $NAME ... |
| 4004 | Delete one or more trace state variables. |
| 4005 | |
| 4006 | teval EXPR, ... |
| 4007 | Evaluate the given expressions without collecting anything into the |
| 4008 | trace buffer. (Valid in tracepoint actions only.) |
| 4009 | |
| 4010 | ftrace FN / FILE:LINE / *ADDR |
| 4011 | Define a fast tracepoint at the given function, line, or address. |
| 4012 | |
| 4013 | * New expression syntax |
| 4014 | |
| 4015 | GDB now parses the 0b prefix of binary numbers the same way as GCC does. |
| 4016 | GDB now parses 0b101010 identically with 42. |
| 4017 | |
| 4018 | * New options |
| 4019 | |
| 4020 | set follow-exec-mode new|same |
| 4021 | show follow-exec-mode |
| 4022 | Control whether GDB reuses the same inferior across an exec call or |
| 4023 | creates a new one. This is useful to be able to restart the old |
| 4024 | executable after the inferior having done an exec call. |
| 4025 | |
| 4026 | set default-collect EXPR, ... |
| 4027 | show default-collect |
| 4028 | Define a list of expressions to be collected at each tracepoint. |
| 4029 | This is a useful way to ensure essential items are not overlooked, |
| 4030 | such as registers or a critical global variable. |
| 4031 | |
| 4032 | set disconnected-tracing |
| 4033 | show disconnected-tracing |
| 4034 | If set to 1, the target is instructed to continue tracing if it |
| 4035 | loses its connection to GDB. If 0, the target is to stop tracing |
| 4036 | upon disconnection. |
| 4037 | |
| 4038 | set circular-trace-buffer |
| 4039 | show circular-trace-buffer |
| 4040 | If set to on, the target is instructed to use a circular trace buffer |
| 4041 | and discard the oldest trace frames instead of stopping the trace due |
| 4042 | to a full trace buffer. If set to off, the trace stops when the buffer |
| 4043 | fills up. Some targets may not support this. |
| 4044 | |
| 4045 | set script-extension off|soft|strict |
| 4046 | show script-extension |
| 4047 | If set to "off", the debugger does not perform any script language |
| 4048 | recognition, and all sourced files are assumed to be GDB scripts. |
| 4049 | If set to "soft" (the default), files are sourced according to |
| 4050 | filename extension, falling back to GDB scripts if the first |
| 4051 | evaluation failed. |
| 4052 | If set to "strict", files are sourced according to filename extension. |
| 4053 | |
| 4054 | set ada trust-PAD-over-XVS on|off |
| 4055 | show ada trust-PAD-over-XVS |
| 4056 | If off, activate a workaround against a bug in the debugging information |
| 4057 | generated by the compiler for PAD types (see gcc/exp_dbug.ads in |
| 4058 | the GCC sources for more information about the GNAT encoding and |
| 4059 | PAD types in particular). It is always safe to set this option to |
| 4060 | off, but this introduces a slight performance penalty. The default |
| 4061 | is on. |
| 4062 | |
| 4063 | * Python API Improvements |
| 4064 | |
| 4065 | ** GDB provides the new class gdb.LazyString. This is useful in |
| 4066 | some pretty-printing cases. The new method gdb.Value.lazy_string |
| 4067 | provides a simple way to create objects of this type. |
| 4068 | |
| 4069 | ** The fields returned by gdb.Type.fields now have an |
| 4070 | `is_base_class' attribute. |
| 4071 | |
| 4072 | ** The new method gdb.Type.range returns the range of an array type. |
| 4073 | |
| 4074 | ** The new method gdb.parse_and_eval can be used to parse and |
| 4075 | evaluate an expression. |
| 4076 | |
| 4077 | * New remote packets |
| 4078 | |
| 4079 | QTDV |
| 4080 | Define a trace state variable. |
| 4081 | |
| 4082 | qTV |
| 4083 | Get the current value of a trace state variable. |
| 4084 | |
| 4085 | QTDisconnected |
| 4086 | Set desired tracing behavior upon disconnection. |
| 4087 | |
| 4088 | QTBuffer:circular |
| 4089 | Set the trace buffer to be linear or circular. |
| 4090 | |
| 4091 | qTfP, qTsP |
| 4092 | Get data about the tracepoints currently in use. |
| 4093 | |
| 4094 | * Bug fixes |
| 4095 | |
| 4096 | Process record now works correctly with hardware watchpoints. |
| 4097 | |
| 4098 | Multiple bug fixes have been made to the mips-irix port, making it |
| 4099 | much more reliable. In particular: |
| 4100 | - Debugging threaded applications is now possible again. Previously, |
| 4101 | GDB would hang while starting the program, or while waiting for |
| 4102 | the program to stop at a breakpoint. |
| 4103 | - Attaching to a running process no longer hangs. |
| 4104 | - An error occurring while loading a core file has been fixed. |
| 4105 | - Changing the value of the PC register now works again. This fixes |
| 4106 | problems observed when using the "jump" command, or when calling |
| 4107 | a function from GDB, or even when assigning a new value to $pc. |
| 4108 | - With the "finish" and "return" commands, the return value for functions |
| 4109 | returning a small array is now correctly printed. |
| 4110 | - It is now possible to break on shared library code which gets executed |
| 4111 | during a shared library init phase (code executed while executing |
| 4112 | their .init section). Previously, the breakpoint would have no effect. |
| 4113 | - GDB is now able to backtrace through the signal handler for |
| 4114 | non-threaded programs. |
| 4115 | |
| 4116 | PIE (Position Independent Executable) programs debugging is now supported. |
| 4117 | This includes debugging execution of PIC (Position Independent Code) shared |
| 4118 | libraries although for that, it should be possible to run such libraries as an |
| 4119 | executable program. |
| 4120 | |
| 4121 | *** Changes in GDB 7.0 |
| 4122 | |
| 4123 | * GDB now has an interface for JIT compilation. Applications that |
| 4124 | dynamically generate code can create symbol files in memory and register |
| 4125 | them with GDB. For users, the feature should work transparently, and |
| 4126 | for JIT developers, the interface is documented in the GDB manual in the |
| 4127 | "JIT Compilation Interface" chapter. |
| 4128 | |
| 4129 | * Tracepoints may now be conditional. The syntax is as for |
| 4130 | breakpoints; either an "if" clause appended to the "trace" command, |
| 4131 | or the "condition" command is available. GDB sends the condition to |
| 4132 | the target for evaluation using the same bytecode format as is used |
| 4133 | for tracepoint actions. |
| 4134 | |
| 4135 | * The disassemble command now supports: an optional /r modifier, print the |
| 4136 | raw instructions in hex as well as in symbolic form, and an optional /m |
| 4137 | modifier to print mixed source+assembly. |
| 4138 | |
| 4139 | * Process record and replay |
| 4140 | |
| 4141 | In a architecture environment that supports ``process record and |
| 4142 | replay'', ``process record and replay'' target can record a log of |
| 4143 | the process execution, and replay it with both forward and reverse |
| 4144 | execute commands. |
| 4145 | |
| 4146 | * Reverse debugging: GDB now has new commands reverse-continue, reverse- |
| 4147 | step, reverse-next, reverse-finish, reverse-stepi, reverse-nexti, and |
| 4148 | set execution-direction {forward|reverse}, for targets that support |
| 4149 | reverse execution. |
| 4150 | |
| 4151 | * GDB now supports hardware watchpoints on MIPS/Linux systems. This |
| 4152 | feature is available with a native GDB running on kernel version |
| 4153 | 2.6.28 or later. |
| 4154 | |
| 4155 | * GDB now has support for multi-byte and wide character sets on the |
| 4156 | target. Strings whose character type is wchar_t, char16_t, or |
| 4157 | char32_t are now correctly printed. GDB supports wide- and unicode- |
| 4158 | literals in C, that is, L'x', L"string", u'x', u"string", U'x', and |
| 4159 | U"string" syntax. And, GDB allows the "%ls" and "%lc" formats in |
| 4160 | `printf'. This feature requires iconv to work properly; if your |
| 4161 | system does not have a working iconv, GDB can use GNU libiconv. See |
| 4162 | the installation instructions for more information. |
| 4163 | |
| 4164 | * GDB now supports automatic retrieval of shared library files from |
| 4165 | remote targets. To use this feature, specify a system root that begins |
| 4166 | with the `remote:' prefix, either via the `set sysroot' command or via |
| 4167 | the `--with-sysroot' configure-time option. |
| 4168 | |
| 4169 | * "info sharedlibrary" now takes an optional regex of libraries to show, |
| 4170 | and it now reports if a shared library has no debugging information. |
| 4171 | |
| 4172 | * Commands `set debug-file-directory', `set solib-search-path' and `set args' |
| 4173 | now complete on file names. |
| 4174 | |
| 4175 | * When completing in expressions, gdb will attempt to limit |
| 4176 | completions to allowable structure or union fields, where appropriate. |
| 4177 | For instance, consider: |
| 4178 | |
| 4179 | # struct example { int f1; double f2; }; |
| 4180 | # struct example variable; |
| 4181 | (gdb) p variable. |
| 4182 | |
| 4183 | If the user types TAB at the end of this command line, the available |
| 4184 | completions will be "f1" and "f2". |
| 4185 | |
| 4186 | * Inlined functions are now supported. They show up in backtraces, and |
| 4187 | the "step", "next", and "finish" commands handle them automatically. |
| 4188 | |
| 4189 | * GDB now supports the token-splicing (##) and stringification (#) |
| 4190 | operators when expanding macros. It also supports variable-arity |
| 4191 | macros. |
| 4192 | |
| 4193 | * GDB now supports inspecting extra signal information, exported by |
| 4194 | the new $_siginfo convenience variable. The feature is currently |
| 4195 | implemented on linux ARM, i386 and amd64. |
| 4196 | |
| 4197 | * GDB can now display the VFP floating point registers and NEON vector |
| 4198 | registers on ARM targets. Both ARM GNU/Linux native GDB and gdbserver |
| 4199 | can provide these registers (requires Linux 2.6.30 or later). Remote |
| 4200 | and simulator targets may also provide them. |
| 4201 | |
| 4202 | * New remote packets |
| 4203 | |
| 4204 | qSearch:memory: |
| 4205 | Search memory for a sequence of bytes. |
| 4206 | |
| 4207 | QStartNoAckMode |
| 4208 | Turn off `+'/`-' protocol acknowledgments to permit more efficient |
| 4209 | operation over reliable transport links. Use of this packet is |
| 4210 | controlled by the `set remote noack-packet' command. |
| 4211 | |
| 4212 | vKill |
| 4213 | Kill the process with the specified process ID. Use this in preference |
| 4214 | to `k' when multiprocess protocol extensions are supported. |
| 4215 | |
| 4216 | qXfer:osdata:read |
| 4217 | Obtains additional operating system information |
| 4218 | |
| 4219 | qXfer:siginfo:read |
| 4220 | qXfer:siginfo:write |
| 4221 | Read or write additional signal information. |
| 4222 | |
| 4223 | * Removed remote protocol undocumented extension |
| 4224 | |
| 4225 | An undocumented extension to the remote protocol's `S' stop reply |
| 4226 | packet that permited the stub to pass a process id was removed. |
| 4227 | Remote servers should use the `T' stop reply packet instead. |
| 4228 | |
| 4229 | * GDB now supports multiple function calling conventions according to the |
| 4230 | DWARF-2 DW_AT_calling_convention function attribute. |
| 4231 | |
| 4232 | * The SH target utilizes the aforementioned change to distinguish between gcc |
| 4233 | and Renesas calling convention. It also adds the new CLI commands |
| 4234 | `set/show sh calling-convention'. |
| 4235 | |
| 4236 | * GDB can now read compressed debug sections, as produced by GNU gold |
| 4237 | with the --compress-debug-sections=zlib flag. |
| 4238 | |
| 4239 | * 64-bit core files are now supported on AIX. |
| 4240 | |
| 4241 | * Thread switching is now supported on Tru64. |
| 4242 | |
| 4243 | * Watchpoints can now be set on unreadable memory locations, e.g. addresses |
| 4244 | which will be allocated using malloc later in program execution. |
| 4245 | |
| 4246 | * The qXfer:libraries:read remote procotol packet now allows passing a |
| 4247 | list of section offsets. |
| 4248 | |
| 4249 | * On GNU/Linux, GDB can now attach to stopped processes. Several race |
| 4250 | conditions handling signals delivered during attach or thread creation |
| 4251 | have also been fixed. |
| 4252 | |
| 4253 | * GDB now supports the use of DWARF boolean types for Ada's type Boolean. |
| 4254 | From the user's standpoint, all unqualified instances of True and False |
| 4255 | are treated as the standard definitions, regardless of context. |
| 4256 | |
| 4257 | * GDB now parses C++ symbol and type names more flexibly. For |
| 4258 | example, given: |
| 4259 | |
| 4260 | template<typename T> class C { }; |
| 4261 | C<char const *> c; |
| 4262 | |
| 4263 | GDB will now correctly handle all of: |
| 4264 | |
| 4265 | ptype C<char const *> |
| 4266 | ptype C<char const*> |
| 4267 | ptype C<const char *> |
| 4268 | ptype C<const char*> |
| 4269 | |
| 4270 | * New features in the GDB remote stub, gdbserver |
| 4271 | |
| 4272 | - The "--wrapper" command-line argument tells gdbserver to use a |
| 4273 | wrapper program to launch programs for debugging. |
| 4274 | |
| 4275 | - On PowerPC and S/390 targets, it is now possible to use a single |
| 4276 | gdbserver executable to debug both 32-bit and 64-bit programs. |
| 4277 | (This requires gdbserver itself to be built as a 64-bit executable.) |
| 4278 | |
| 4279 | - gdbserver uses the new noack protocol mode for TCP connections to |
| 4280 | reduce communications latency, if also supported and enabled in GDB. |
| 4281 | |
| 4282 | - Support for the sparc64-linux-gnu target is now included in |
| 4283 | gdbserver. |
| 4284 | |
| 4285 | - The amd64-linux build of gdbserver now supports debugging both |
| 4286 | 32-bit and 64-bit programs. |
| 4287 | |
| 4288 | - The i386-linux, amd64-linux, and i386-win32 builds of gdbserver |
| 4289 | now support hardware watchpoints, and will use them automatically |
| 4290 | as appropriate. |
| 4291 | |
| 4292 | * Python scripting |
| 4293 | |
| 4294 | GDB now has support for scripting using Python. Whether this is |
| 4295 | available is determined at configure time. |
| 4296 | |
| 4297 | New GDB commands can now be written in Python. |
| 4298 | |
| 4299 | * Ada tasking support |
| 4300 | |
| 4301 | Ada tasks can now be inspected in GDB. The following commands have |
| 4302 | been introduced: |
| 4303 | |
| 4304 | info tasks |
| 4305 | Print the list of Ada tasks. |
| 4306 | info task N |
| 4307 | Print detailed information about task number N. |
| 4308 | task |
| 4309 | Print the task number of the current task. |
| 4310 | task N |
| 4311 | Switch the context of debugging to task number N. |
| 4312 | |
| 4313 | * Support for user-defined prefixed commands. The "define" command can |
| 4314 | add new commands to existing prefixes, e.g. "target". |
| 4315 | |
| 4316 | * Multi-inferior, multi-process debugging. |
| 4317 | |
| 4318 | GDB now has generalized support for multi-inferior debugging. See |
| 4319 | "Debugging Multiple Inferiors" in the manual for more information. |
| 4320 | Although availability still depends on target support, the command |
| 4321 | set is more uniform now. The GNU/Linux specific multi-forks support |
| 4322 | has been migrated to this new framework. This implied some user |
| 4323 | visible changes; see "New commands" and also "Removed commands" |
| 4324 | below. |
| 4325 | |
| 4326 | * Target descriptions can now describe the target OS ABI. See the |
| 4327 | "Target Description Format" section in the user manual for more |
| 4328 | information. |
| 4329 | |
| 4330 | * Target descriptions can now describe "compatible" architectures |
| 4331 | to indicate that the target can execute applications for a different |
| 4332 | architecture in addition to those for the main target architecture. |
| 4333 | See the "Target Description Format" section in the user manual for |
| 4334 | more information. |
| 4335 | |
| 4336 | * Multi-architecture debugging. |
| 4337 | |
| 4338 | GDB now includes general supports for debugging applications on |
| 4339 | hybrid systems that use more than one single processor architecture |
| 4340 | at the same time. Each such hybrid architecture still requires |
| 4341 | specific support to be added. The only hybrid architecture supported |
| 4342 | in this version of GDB is the Cell Broadband Engine. |
| 4343 | |
| 4344 | * GDB now supports integrated debugging of Cell/B.E. applications that |
| 4345 | use both the PPU and SPU architectures. To enable support for hybrid |
| 4346 | Cell/B.E. debugging, you need to configure GDB to support both the |
| 4347 | powerpc-linux or powerpc64-linux and the spu-elf targets, using the |
| 4348 | --enable-targets configure option. |
| 4349 | |
| 4350 | * Non-stop mode debugging. |
| 4351 | |
| 4352 | For some targets, GDB now supports an optional mode of operation in |
| 4353 | which you can examine stopped threads while other threads continue |
| 4354 | to execute freely. This is referred to as non-stop mode, with the |
| 4355 | old mode referred to as all-stop mode. See the "Non-Stop Mode" |
| 4356 | section in the user manual for more information. |
| 4357 | |
| 4358 | To be able to support remote non-stop debugging, a remote stub needs |
| 4359 | to implement the non-stop mode remote protocol extensions, as |
| 4360 | described in the "Remote Non-Stop" section of the user manual. The |
| 4361 | GDB remote stub, gdbserver, has been adjusted to support these |
| 4362 | extensions on linux targets. |
| 4363 | |
| 4364 | * New commands (for set/show, see "New options" below) |
| 4365 | |
| 4366 | catch syscall [NAME(S) | NUMBER(S)] |
| 4367 | Catch system calls. Arguments, which should be names of system |
| 4368 | calls or their numbers, mean catch only those syscalls. Without |
| 4369 | arguments, every syscall will be caught. When the inferior issues |
| 4370 | any of the specified syscalls, GDB will stop and announce the system |
| 4371 | call, both when it is called and when its call returns. This |
| 4372 | feature is currently available with a native GDB running on the |
| 4373 | Linux Kernel, under the following architectures: x86, x86_64, |
| 4374 | PowerPC and PowerPC64. |
| 4375 | |
| 4376 | find [/size-char] [/max-count] start-address, end-address|+search-space-size, |
| 4377 | val1 [, val2, ...] |
| 4378 | Search memory for a sequence of bytes. |
| 4379 | |
| 4380 | maint set python print-stack |
| 4381 | maint show python print-stack |
| 4382 | Show a stack trace when an error is encountered in a Python script. |
| 4383 | |
| 4384 | python [CODE] |
| 4385 | Invoke CODE by passing it to the Python interpreter. |
| 4386 | |
| 4387 | macro define |
| 4388 | macro list |
| 4389 | macro undef |
| 4390 | These allow macros to be defined, undefined, and listed |
| 4391 | interactively. |
| 4392 | |
| 4393 | info os processes |
| 4394 | Show operating system information about processes. |
| 4395 | |
| 4396 | info inferiors |
| 4397 | List the inferiors currently under GDB's control. |
| 4398 | |
| 4399 | inferior NUM |
| 4400 | Switch focus to inferior number NUM. |
| 4401 | |
| 4402 | detach inferior NUM |
| 4403 | Detach from inferior number NUM. |
| 4404 | |
| 4405 | kill inferior NUM |
| 4406 | Kill inferior number NUM. |
| 4407 | |
| 4408 | * New options |
| 4409 | |
| 4410 | set spu stop-on-load |
| 4411 | show spu stop-on-load |
| 4412 | Control whether to stop for new SPE threads during Cell/B.E. debugging. |
| 4413 | |
| 4414 | set spu auto-flush-cache |
| 4415 | show spu auto-flush-cache |
| 4416 | Control whether to automatically flush the software-managed cache |
| 4417 | during Cell/B.E. debugging. |
| 4418 | |
| 4419 | set sh calling-convention |
| 4420 | show sh calling-convention |
| 4421 | Control the calling convention used when calling SH target functions. |
| 4422 | |
| 4423 | set debug timestamp |
| 4424 | show debug timestamp |
| 4425 | Control display of timestamps with GDB debugging output. |
| 4426 | |
| 4427 | set disassemble-next-line |
| 4428 | show disassemble-next-line |
| 4429 | Control display of disassembled source lines or instructions when |
| 4430 | the debuggee stops. |
| 4431 | |
| 4432 | set remote noack-packet |
| 4433 | show remote noack-packet |
| 4434 | Set/show the use of remote protocol QStartNoAckMode packet. See above |
| 4435 | under "New remote packets." |
| 4436 | |
| 4437 | set remote query-attached-packet |
| 4438 | show remote query-attached-packet |
| 4439 | Control use of remote protocol `qAttached' (query-attached) packet. |
| 4440 | |
| 4441 | set remote read-siginfo-object |
| 4442 | show remote read-siginfo-object |
| 4443 | Control use of remote protocol `qXfer:siginfo:read' (read-siginfo-object) |
| 4444 | packet. |
| 4445 | |
| 4446 | set remote write-siginfo-object |
| 4447 | show remote write-siginfo-object |
| 4448 | Control use of remote protocol `qXfer:siginfo:write' (write-siginfo-object) |
| 4449 | packet. |
| 4450 | |
| 4451 | set remote reverse-continue |
| 4452 | show remote reverse-continue |
| 4453 | Control use of remote protocol 'bc' (reverse-continue) packet. |
| 4454 | |
| 4455 | set remote reverse-step |
| 4456 | show remote reverse-step |
| 4457 | Control use of remote protocol 'bs' (reverse-step) packet. |
| 4458 | |
| 4459 | set displaced-stepping |
| 4460 | show displaced-stepping |
| 4461 | Control displaced stepping mode. Displaced stepping is a way to |
| 4462 | single-step over breakpoints without removing them from the debuggee. |
| 4463 | Also known as "out-of-line single-stepping". |
| 4464 | |
| 4465 | set debug displaced |
| 4466 | show debug displaced |
| 4467 | Control display of debugging info for displaced stepping. |
| 4468 | |
| 4469 | maint set internal-error |
| 4470 | maint show internal-error |
| 4471 | Control what GDB does when an internal error is detected. |
| 4472 | |
| 4473 | maint set internal-warning |
| 4474 | maint show internal-warning |
| 4475 | Control what GDB does when an internal warning is detected. |
| 4476 | |
| 4477 | set exec-wrapper |
| 4478 | show exec-wrapper |
| 4479 | unset exec-wrapper |
| 4480 | Use a wrapper program to launch programs for debugging. |
| 4481 | |
| 4482 | set multiple-symbols (all|ask|cancel) |
| 4483 | show multiple-symbols |
| 4484 | The value of this variable can be changed to adjust the debugger behavior |
| 4485 | when an expression or a breakpoint location contains an ambiguous symbol |
| 4486 | name (an overloaded function name, for instance). |
| 4487 | |
| 4488 | set breakpoint always-inserted |
| 4489 | show breakpoint always-inserted |
| 4490 | Keep breakpoints always inserted in the target, as opposed to inserting |
| 4491 | them when resuming the target, and removing them when the target stops. |
| 4492 | This option can improve debugger performance on slow remote targets. |
| 4493 | |
| 4494 | set arm fallback-mode (arm|thumb|auto) |
| 4495 | show arm fallback-mode |
| 4496 | set arm force-mode (arm|thumb|auto) |
| 4497 | show arm force-mode |
| 4498 | These commands control how ARM GDB determines whether instructions |
| 4499 | are ARM or Thumb. The default for both settings is auto, which uses |
| 4500 | the current CPSR value for instructions without symbols; previous |
| 4501 | versions of GDB behaved as if "set arm fallback-mode arm". |
| 4502 | |
| 4503 | set disable-randomization |
| 4504 | show disable-randomization |
| 4505 | Standalone programs run with the virtual address space randomization enabled |
| 4506 | by default on some platforms. This option keeps the addresses stable across |
| 4507 | multiple debugging sessions. |
| 4508 | |
| 4509 | set non-stop |
| 4510 | show non-stop |
| 4511 | Control whether other threads are stopped or not when some thread hits |
| 4512 | a breakpoint. |
| 4513 | |
| 4514 | set target-async |
| 4515 | show target-async |
| 4516 | Requests that asynchronous execution is enabled in the target, if available. |
| 4517 | In this case, it's possible to resume target in the background, and interact |
| 4518 | with GDB while the target is running. "show target-async" displays the |
| 4519 | current state of asynchronous execution of the target. |
| 4520 | |
| 4521 | set target-wide-charset |
| 4522 | show target-wide-charset |
| 4523 | The target-wide-charset is the name of the character set that GDB |
| 4524 | uses when printing characters whose type is wchar_t. |
| 4525 | |
| 4526 | set tcp auto-retry (on|off) |
| 4527 | show tcp auto-retry |
| 4528 | set tcp connect-timeout |
| 4529 | show tcp connect-timeout |
| 4530 | These commands allow GDB to retry failed TCP connections to a remote stub |
| 4531 | with a specified timeout period; this is useful if the stub is launched |
| 4532 | in parallel with GDB but may not be ready to accept connections immediately. |
| 4533 | |
| 4534 | set libthread-db-search-path |
| 4535 | show libthread-db-search-path |
| 4536 | Control list of directories which GDB will search for appropriate |
| 4537 | libthread_db. |
| 4538 | |
| 4539 | set schedule-multiple (on|off) |
| 4540 | show schedule-multiple |
| 4541 | Allow GDB to resume all threads of all processes or only threads of |
| 4542 | the current process. |
| 4543 | |
| 4544 | set stack-cache |
| 4545 | show stack-cache |
| 4546 | Use more aggressive caching for accesses to the stack. This improves |
| 4547 | performance of remote debugging (particularly backtraces) without |
| 4548 | affecting correctness. |
| 4549 | |
| 4550 | set interactive-mode (on|off|auto) |
| 4551 | show interactive-mode |
| 4552 | Control whether GDB runs in interactive mode (on) or not (off). |
| 4553 | When in interactive mode, GDB waits for the user to answer all |
| 4554 | queries. Otherwise, GDB does not wait and assumes the default |
| 4555 | answer. When set to auto (the default), GDB determines which |
| 4556 | mode to use based on the stdin settings. |
| 4557 | |
| 4558 | * Removed commands |
| 4559 | |
| 4560 | info forks |
| 4561 | For program forks, this is replaced by the new more generic `info |
| 4562 | inferiors' command. To list checkpoints, you can still use the |
| 4563 | `info checkpoints' command, which was an alias for the `info forks' |
| 4564 | command. |
| 4565 | |
| 4566 | fork NUM |
| 4567 | Replaced by the new `inferior' command. To switch between |
| 4568 | checkpoints, you can still use the `restart' command, which was an |
| 4569 | alias for the `fork' command. |
| 4570 | |
| 4571 | process PID |
| 4572 | This is removed, since some targets don't have a notion of |
| 4573 | processes. To switch between processes, you can still use the |
| 4574 | `inferior' command using GDB's own inferior number. |
| 4575 | |
| 4576 | delete fork NUM |
| 4577 | For program forks, this is replaced by the new more generic `kill |
| 4578 | inferior' command. To delete a checkpoint, you can still use the |
| 4579 | `delete checkpoint' command, which was an alias for the `delete |
| 4580 | fork' command. |
| 4581 | |
| 4582 | detach fork NUM |
| 4583 | For program forks, this is replaced by the new more generic `detach |
| 4584 | inferior' command. To detach a checkpoint, you can still use the |
| 4585 | `detach checkpoint' command, which was an alias for the `detach |
| 4586 | fork' command. |
| 4587 | |
| 4588 | * New native configurations |
| 4589 | |
| 4590 | x86/x86_64 Darwin i[34567]86-*-darwin* |
| 4591 | |
| 4592 | x86_64 MinGW x86_64-*-mingw* |
| 4593 | |
| 4594 | * New targets |
| 4595 | |
| 4596 | Lattice Mico32 lm32-* |
| 4597 | x86 DICOS i[34567]86-*-dicos* |
| 4598 | x86_64 DICOS x86_64-*-dicos* |
| 4599 | S+core 3 score-*-* |
| 4600 | |
| 4601 | * The GDB remote stub, gdbserver, now supports x86 Windows CE |
| 4602 | (mingw32ce) debugging. |
| 4603 | |
| 4604 | * Removed commands |
| 4605 | |
| 4606 | catch load |
| 4607 | catch unload |
| 4608 | These commands were actually not implemented on any target. |
| 4609 | |
| 4610 | *** Changes in GDB 6.8 |
| 4611 | |
| 4612 | * New native configurations |
| 4613 | |
| 4614 | NetBSD/hppa hppa*-*netbsd* |
| 4615 | Xtensa GNU/Linux xtensa*-*-linux* |
| 4616 | |
| 4617 | * New targets |
| 4618 | |
| 4619 | NetBSD/hppa hppa*-*-netbsd* |
| 4620 | Xtensa GNU/Lunux xtensa*-*-linux* |
| 4621 | |
| 4622 | * Change in command line behavior -- corefiles vs. process ids. |
| 4623 | |
| 4624 | When the '-p NUMBER' or '--pid NUMBER' options are used, and |
| 4625 | attaching to process NUMBER fails, GDB no longer attempts to open a |
| 4626 | core file named NUMBER. Attaching to a program using the -c option |
| 4627 | is no longer supported. Instead, use the '-p' or '--pid' options. |
| 4628 | |
| 4629 | * GDB can now be built as a native debugger for debugging Windows x86 |
| 4630 | (mingw32) Portable Executable (PE) programs. |
| 4631 | |
| 4632 | * Pending breakpoints no longer change their number when their address |
| 4633 | is resolved. |
| 4634 | |
| 4635 | * GDB now supports breakpoints with multiple locations, |
| 4636 | including breakpoints on C++ constructors, inside C++ templates, |
| 4637 | and in inlined functions. |
| 4638 | |
| 4639 | * GDB's ability to debug optimized code has been improved. GDB more |
| 4640 | accurately identifies function bodies and lexical blocks that occupy |
| 4641 | more than one contiguous range of addresses. |
| 4642 | |
| 4643 | * Target descriptions can now describe registers for PowerPC. |
| 4644 | |
| 4645 | * The GDB remote stub, gdbserver, now supports the AltiVec and SPE |
| 4646 | registers on PowerPC targets. |
| 4647 | |
| 4648 | * The GDB remote stub, gdbserver, now supports thread debugging on GNU/Linux |
| 4649 | targets even when the libthread_db library is not available. |
| 4650 | |
| 4651 | * The GDB remote stub, gdbserver, now supports the new file transfer |
| 4652 | commands (remote put, remote get, and remote delete). |
| 4653 | |
| 4654 | * The GDB remote stub, gdbserver, now supports run and attach in |
| 4655 | extended-remote mode. |
| 4656 | |
| 4657 | * hppa*64*-*-hpux11* target broken |
| 4658 | The debugger is unable to start a program and fails with the following |
| 4659 | error: "Error trying to get information about dynamic linker". |
| 4660 | The gdb-6.7 release is also affected. |
| 4661 | |
| 4662 | * GDB now supports the --enable-targets= configure option to allow |
| 4663 | building a single GDB executable that supports multiple remote |
| 4664 | target architectures. |
| 4665 | |
| 4666 | * GDB now supports debugging C and C++ programs which use the |
| 4667 | Decimal Floating Point extension. In addition, the PowerPC target |
| 4668 | now has a set of pseudo-registers to inspect decimal float values |
| 4669 | stored in two consecutive float registers. |
| 4670 | |
| 4671 | * The -break-insert MI command can optionally create pending |
| 4672 | breakpoints now. |
| 4673 | |
| 4674 | * Improved support for debugging Ada |
| 4675 | Many improvements to the Ada language support have been made. These |
| 4676 | include: |
| 4677 | - Better support for Ada2005 interface types |
| 4678 | - Improved handling of arrays and slices in general |
| 4679 | - Better support for Taft-amendment types |
| 4680 | - The '{type} ADDRESS' expression is now allowed on the left hand-side |
| 4681 | of an assignment |
| 4682 | - Improved command completion in Ada |
| 4683 | - Several bug fixes |
| 4684 | |
| 4685 | * GDB on GNU/Linux and HP/UX can now debug through "exec" of a new |
| 4686 | process. |
| 4687 | |
| 4688 | * New commands |
| 4689 | |
| 4690 | set print frame-arguments (all|scalars|none) |
| 4691 | show print frame-arguments |
| 4692 | The value of this variable can be changed to control which argument |
| 4693 | values should be printed by the debugger when displaying a frame. |
| 4694 | |
| 4695 | remote put |
| 4696 | remote get |
| 4697 | remote delete |
| 4698 | Transfer files to and from a remote target, and delete remote files. |
| 4699 | |
| 4700 | * New MI commands |
| 4701 | |
| 4702 | -target-file-put |
| 4703 | -target-file-get |
| 4704 | -target-file-delete |
| 4705 | Transfer files to and from a remote target, and delete remote files. |
| 4706 | |
| 4707 | * New remote packets |
| 4708 | |
| 4709 | vFile:open: |
| 4710 | vFile:close: |
| 4711 | vFile:pread: |
| 4712 | vFile:pwrite: |
| 4713 | vFile:unlink: |
| 4714 | Open, close, read, write, and delete files on the remote system. |
| 4715 | |
| 4716 | vAttach |
| 4717 | Attach to an existing process on the remote system, in extended-remote |
| 4718 | mode. |
| 4719 | |
| 4720 | vRun |
| 4721 | Run a new process on the remote system, in extended-remote mode. |
| 4722 | |
| 4723 | *** Changes in GDB 6.7 |
| 4724 | |
| 4725 | * Resolved 101 resource leaks, null pointer dereferences, etc. in gdb, |
| 4726 | bfd, libiberty and opcodes, as revealed by static analysis donated by |
| 4727 | Coverity, Inc. (http://scan.coverity.com). |
| 4728 | |
| 4729 | * When looking up multiply-defined global symbols, GDB will now prefer the |
| 4730 | symbol definition in the current shared library if it was built using the |
| 4731 | -Bsymbolic linker option. |
| 4732 | |
| 4733 | * When the Text User Interface (TUI) is not configured, GDB will now |
| 4734 | recognize the -tui command-line option and print a message that the TUI |
| 4735 | is not supported. |
| 4736 | |
| 4737 | * The GDB remote stub, gdbserver, now has lower overhead for high |
| 4738 | frequency signals (e.g. SIGALRM) via the QPassSignals packet. |
| 4739 | |
| 4740 | * GDB for MIPS targets now autodetects whether a remote target provides |
| 4741 | 32-bit or 64-bit register values. |
| 4742 | |
| 4743 | * Support for C++ member pointers has been improved. |
| 4744 | |
| 4745 | * GDB now understands XML target descriptions, which specify the |
| 4746 | target's overall architecture. GDB can read a description from |
| 4747 | a local file or over the remote serial protocol. |
| 4748 | |
| 4749 | * Vectors of single-byte data use a new integer type which is not |
| 4750 | automatically displayed as character or string data. |
| 4751 | |
| 4752 | * The /s format now works with the print command. It displays |
| 4753 | arrays of single-byte integers and pointers to single-byte integers |
| 4754 | as strings. |
| 4755 | |
| 4756 | * Target descriptions can now describe target-specific registers, |
| 4757 | for architectures which have implemented the support (currently |
| 4758 | only ARM, M68K, and MIPS). |
| 4759 | |
| 4760 | * GDB and the GDB remote stub, gdbserver, now support the XScale |
| 4761 | iWMMXt coprocessor. |
| 4762 | |
| 4763 | * The GDB remote stub, gdbserver, has been updated to support |
| 4764 | ARM Windows CE (mingw32ce) debugging, and GDB Windows CE support |
| 4765 | has been rewritten to use the standard GDB remote protocol. |
| 4766 | |
| 4767 | * GDB can now step into C++ functions which are called through thunks. |
| 4768 | |
| 4769 | * GDB for the Cell/B.E. SPU now supports overlay debugging. |
| 4770 | |
| 4771 | * The GDB remote protocol "qOffsets" packet can now honor ELF segment |
| 4772 | layout. It also supports a TextSeg= and DataSeg= response when only |
| 4773 | segment base addresses (rather than offsets) are available. |
| 4774 | |
| 4775 | * The /i format now outputs any trailing branch delay slot instructions |
| 4776 | immediately following the last instruction within the count specified. |
| 4777 | |
| 4778 | * The GDB remote protocol "T" stop reply packet now supports a |
| 4779 | "library" response. Combined with the new "qXfer:libraries:read" |
| 4780 | packet, this response allows GDB to debug shared libraries on targets |
| 4781 | where the operating system manages the list of loaded libraries (e.g. |
| 4782 | Windows and SymbianOS). |
| 4783 | |
| 4784 | * The GDB remote stub, gdbserver, now supports dynamic link libraries |
| 4785 | (DLLs) on Windows and Windows CE targets. |
| 4786 | |
| 4787 | * GDB now supports a faster verification that a .debug file matches its binary |
| 4788 | according to its build-id signature, if the signature is present. |
| 4789 | |
| 4790 | * New commands |
| 4791 | |
| 4792 | set remoteflow |
| 4793 | show remoteflow |
| 4794 | Enable or disable hardware flow control (RTS/CTS) on the serial port |
| 4795 | when debugging using remote targets. |
| 4796 | |
| 4797 | set mem inaccessible-by-default |
| 4798 | show mem inaccessible-by-default |
| 4799 | If the target supplies a memory map, for instance via the remote |
| 4800 | protocol's "qXfer:memory-map:read" packet, setting this variable |
| 4801 | prevents GDB from accessing memory outside the memory map. This |
| 4802 | is useful for targets with memory mapped registers or which react |
| 4803 | badly to accesses of unmapped address space. |
| 4804 | |
| 4805 | set breakpoint auto-hw |
| 4806 | show breakpoint auto-hw |
| 4807 | If the target supplies a memory map, for instance via the remote |
| 4808 | protocol's "qXfer:memory-map:read" packet, setting this variable |
| 4809 | lets GDB use hardware breakpoints automatically for memory regions |
| 4810 | where it can not use software breakpoints. This covers both the |
| 4811 | "break" command and internal breakpoints used for other commands |
| 4812 | including "next" and "finish". |
| 4813 | |
| 4814 | catch exception |
| 4815 | catch exception unhandled |
| 4816 | Stop the program execution when Ada exceptions are raised. |
| 4817 | |
| 4818 | catch assert |
| 4819 | Stop the program execution when an Ada assertion failed. |
| 4820 | |
| 4821 | set sysroot |
| 4822 | show sysroot |
| 4823 | Set an alternate system root for target files. This is a more |
| 4824 | general version of "set solib-absolute-prefix", which is now |
| 4825 | an alias to "set sysroot". |
| 4826 | |
| 4827 | info spu |
| 4828 | Provide extended SPU facility status information. This set of |
| 4829 | commands is available only when debugging the Cell/B.E. SPU |
| 4830 | architecture. |
| 4831 | |
| 4832 | * New native configurations |
| 4833 | |
| 4834 | OpenBSD/sh sh*-*openbsd* |
| 4835 | |
| 4836 | set tdesc filename |
| 4837 | unset tdesc filename |
| 4838 | show tdesc filename |
| 4839 | Use the specified local file as an XML target description, and do |
| 4840 | not query the target for its built-in description. |
| 4841 | |
| 4842 | * New targets |
| 4843 | |
| 4844 | OpenBSD/sh sh*-*-openbsd* |
| 4845 | MIPS64 GNU/Linux (gdbserver) mips64-linux-gnu |
| 4846 | Toshiba Media Processor mep-elf |
| 4847 | |
| 4848 | * New remote packets |
| 4849 | |
| 4850 | QPassSignals: |
| 4851 | Ignore the specified signals; pass them directly to the debugged program |
| 4852 | without stopping other threads or reporting them to GDB. |
| 4853 | |
| 4854 | qXfer:features:read: |
| 4855 | Read an XML target description from the target, which describes its |
| 4856 | features. |
| 4857 | |
| 4858 | qXfer:spu:read: |
| 4859 | qXfer:spu:write: |
| 4860 | Read or write contents of an spufs file on the target system. These |
| 4861 | packets are available only on the Cell/B.E. SPU architecture. |
| 4862 | |
| 4863 | qXfer:libraries:read: |
| 4864 | Report the loaded shared libraries. Combined with new "T" packet |
| 4865 | response, this packet allows GDB to debug shared libraries on |
| 4866 | targets where the operating system manages the list of loaded |
| 4867 | libraries (e.g. Windows and SymbianOS). |
| 4868 | |
| 4869 | * Removed targets |
| 4870 | |
| 4871 | Support for these obsolete configurations has been removed. |
| 4872 | |
| 4873 | alpha*-*-osf1* |
| 4874 | alpha*-*-osf2* |
| 4875 | d10v-*-* |
| 4876 | hppa*-*-hiux* |
| 4877 | i[34567]86-ncr-* |
| 4878 | i[34567]86-*-dgux* |
| 4879 | i[34567]86-*-lynxos* |
| 4880 | i[34567]86-*-netware* |
| 4881 | i[34567]86-*-sco3.2v5* |
| 4882 | i[34567]86-*-sco3.2v4* |
| 4883 | i[34567]86-*-sco* |
| 4884 | i[34567]86-*-sysv4.2* |
| 4885 | i[34567]86-*-sysv4* |
| 4886 | i[34567]86-*-sysv5* |
| 4887 | i[34567]86-*-unixware2* |
| 4888 | i[34567]86-*-unixware* |
| 4889 | i[34567]86-*-sysv* |
| 4890 | i[34567]86-*-isc* |
| 4891 | m68*-cisco*-* |
| 4892 | m68*-tandem-* |
| 4893 | mips*-*-pe |
| 4894 | rs6000-*-lynxos* |
| 4895 | sh*-*-pe |
| 4896 | |
| 4897 | * Other removed features |
| 4898 | |
| 4899 | target abug |
| 4900 | target cpu32bug |
| 4901 | target est |
| 4902 | target rom68k |
| 4903 | |
| 4904 | Various m68k-only ROM monitors. |
| 4905 | |
| 4906 | target hms |
| 4907 | target e7000 |
| 4908 | target sh3 |
| 4909 | target sh3e |
| 4910 | |
| 4911 | Various Renesas ROM monitors and debugging interfaces for SH and |
| 4912 | H8/300. |
| 4913 | |
| 4914 | target ocd |
| 4915 | |
| 4916 | Support for a Macraigor serial interface to on-chip debugging. |
| 4917 | GDB does not directly support the newer parallel or USB |
| 4918 | interfaces. |
| 4919 | |
| 4920 | DWARF 1 support |
| 4921 | |
| 4922 | A debug information format. The predecessor to DWARF 2 and |
| 4923 | DWARF 3, which are still supported. |
| 4924 | |
| 4925 | Support for the HP aCC compiler on HP-UX/PA-RISC |
| 4926 | |
| 4927 | SOM-encapsulated symbolic debugging information, automatic |
| 4928 | invocation of pxdb, and the aCC custom C++ ABI. This does not |
| 4929 | affect HP-UX for Itanium or GCC for HP-UX/PA-RISC. Code compiled |
| 4930 | with aCC can still be debugged on an assembly level. |
| 4931 | |
| 4932 | MIPS ".pdr" sections |
| 4933 | |
| 4934 | A MIPS-specific format used to describe stack frame layout |
| 4935 | in debugging information. |
| 4936 | |
| 4937 | Scheme support |
| 4938 | |
| 4939 | GDB could work with an older version of Guile to debug |
| 4940 | the interpreter and Scheme programs running in it. |
| 4941 | |
| 4942 | set mips stack-arg-size |
| 4943 | set mips saved-gpreg-size |
| 4944 | |
| 4945 | Use "set mips abi" to control parameter passing for MIPS. |
| 4946 | |
| 4947 | *** Changes in GDB 6.6 |
| 4948 | |
| 4949 | * New targets |
| 4950 | |
| 4951 | Xtensa xtensa-elf |
| 4952 | Cell Broadband Engine SPU spu-elf |
| 4953 | |
| 4954 | * GDB can now be configured as a cross-debugger targeting native Windows |
| 4955 | (mingw32) or Cygwin. It can communicate with a remote debugging stub |
| 4956 | running on a Windows system over TCP/IP to debug Windows programs. |
| 4957 | |
| 4958 | * The GDB remote stub, gdbserver, has been updated to support Windows and |
| 4959 | Cygwin debugging. Both single-threaded and multi-threaded programs are |
| 4960 | supported. |
| 4961 | |
| 4962 | * The "set trust-readonly-sections" command works again. This command was |
| 4963 | broken in GDB 6.3, 6.4, and 6.5. |
| 4964 | |
| 4965 | * The "load" command now supports writing to flash memory, if the remote |
| 4966 | stub provides the required support. |
| 4967 | |
| 4968 | * Support for GNU/Linux Thread Local Storage (TLS, per-thread variables) no |
| 4969 | longer requires symbolic debug information (e.g. DWARF-2). |
| 4970 | |
| 4971 | * New commands |
| 4972 | |
| 4973 | set substitute-path |
| 4974 | unset substitute-path |
| 4975 | show substitute-path |
| 4976 | Manage a list of substitution rules that GDB uses to rewrite the name |
| 4977 | of the directories where the sources are located. This can be useful |
| 4978 | for instance when the sources were moved to a different location |
| 4979 | between compilation and debugging. |
| 4980 | |
| 4981 | set trace-commands |
| 4982 | show trace-commands |
| 4983 | Print each CLI command as it is executed. Each command is prefixed with |
| 4984 | a number of `+' symbols representing the nesting depth. |
| 4985 | The source command now has a `-v' option to enable the same feature. |
| 4986 | |
| 4987 | * REMOVED features |
| 4988 | |
| 4989 | The ARM Demon monitor support (RDP protocol, "target rdp"). |
| 4990 | |
| 4991 | Kernel Object Display, an embedded debugging feature which only worked with |
| 4992 | an obsolete version of Cisco IOS. |
| 4993 | |
| 4994 | The 'set download-write-size' and 'show download-write-size' commands. |
| 4995 | |
| 4996 | * New remote packets |
| 4997 | |
| 4998 | qSupported: |
| 4999 | Tell a stub about GDB client features, and request remote target features. |
| 5000 | The first feature implemented is PacketSize, which allows the target to |
| 5001 | specify the size of packets it can handle - to minimize the number of |
| 5002 | packets required and improve performance when connected to a remote |
| 5003 | target. |
| 5004 | |
| 5005 | qXfer:auxv:read: |
| 5006 | Fetch an OS auxilliary vector from the remote stub. This packet is a |
| 5007 | more efficient replacement for qPart:auxv:read. |
| 5008 | |
| 5009 | qXfer:memory-map:read: |
| 5010 | Fetch a memory map from the remote stub, including information about |
| 5011 | RAM, ROM, and flash memory devices. |
| 5012 | |
| 5013 | vFlashErase: |
| 5014 | vFlashWrite: |
| 5015 | vFlashDone: |
| 5016 | Erase and program a flash memory device. |
| 5017 | |
| 5018 | * Removed remote packets |
| 5019 | |
| 5020 | qPart:auxv:read: |
| 5021 | This packet has been replaced by qXfer:auxv:read. Only GDB 6.4 and 6.5 |
| 5022 | used it, and only gdbserver implemented it. |
| 5023 | |
| 5024 | *** Changes in GDB 6.5 |
| 5025 | |
| 5026 | * New targets |
| 5027 | |
| 5028 | Renesas M32C/M16C m32c-elf |
| 5029 | |
| 5030 | Morpho Technologies ms1 ms1-elf |
| 5031 | |
| 5032 | * New commands |
| 5033 | |
| 5034 | init-if-undefined Initialize a convenience variable, but |
| 5035 | only if it doesn't already have a value. |
| 5036 | |
| 5037 | The following commands are presently only implemented for native GNU/Linux: |
| 5038 | |
| 5039 | checkpoint Save a snapshot of the program state. |
| 5040 | |
| 5041 | restart <n> Return the program state to a |
| 5042 | previously saved state. |
| 5043 | |
| 5044 | info checkpoints List currently saved checkpoints. |
| 5045 | |
| 5046 | delete-checkpoint <n> Delete a previously saved checkpoint. |
| 5047 | |
| 5048 | set|show detach-on-fork Tell gdb whether to detach from a newly |
| 5049 | forked process, or to keep debugging it. |
| 5050 | |
| 5051 | info forks List forks of the user program that |
| 5052 | are available to be debugged. |
| 5053 | |
| 5054 | fork <n> Switch to debugging one of several |
| 5055 | forks of the user program that are |
| 5056 | available to be debugged. |
| 5057 | |
| 5058 | delete-fork <n> Delete a fork from the list of forks |
| 5059 | that are available to be debugged (and |
| 5060 | kill the forked process). |
| 5061 | |
| 5062 | detach-fork <n> Delete a fork from the list of forks |
| 5063 | that are available to be debugged (and |
| 5064 | allow the process to continue). |
| 5065 | |
| 5066 | * New architecture |
| 5067 | |
| 5068 | Morpho Technologies ms2 ms1-elf |
| 5069 | |
| 5070 | * Improved Windows host support |
| 5071 | |
| 5072 | GDB now builds as a cross debugger hosted on i686-mingw32, including |
| 5073 | native console support, and remote communications using either |
| 5074 | network sockets or serial ports. |
| 5075 | |
| 5076 | * Improved Modula-2 language support |
| 5077 | |
| 5078 | GDB can now print most types in the Modula-2 syntax. This includes: |
| 5079 | basic types, set types, record types, enumerated types, range types, |
| 5080 | pointer types and ARRAY types. Procedure var parameters are correctly |
| 5081 | printed and hexadecimal addresses and character constants are also |
| 5082 | written in the Modula-2 syntax. Best results can be obtained by using |
| 5083 | GNU Modula-2 together with the -gdwarf-2 command line option. |
| 5084 | |
| 5085 | * REMOVED features |
| 5086 | |
| 5087 | The ARM rdi-share module. |
| 5088 | |
| 5089 | The Netware NLM debug server. |
| 5090 | |
| 5091 | *** Changes in GDB 6.4 |
| 5092 | |
| 5093 | * New native configurations |
| 5094 | |
| 5095 | OpenBSD/arm arm*-*-openbsd* |
| 5096 | OpenBSD/mips64 mips64-*-openbsd* |
| 5097 | |
| 5098 | * New targets |
| 5099 | |
| 5100 | Morpho Technologies ms1 ms1-elf |
| 5101 | |
| 5102 | * New command line options |
| 5103 | |
| 5104 | --batch-silent As for --batch, but totally silent. |
| 5105 | --return-child-result The debugger will exist with the same value |
| 5106 | the child (debugged) program exited with. |
| 5107 | --eval-command COMMAND, -ex COMMAND |
| 5108 | Execute a single GDB CLI command. This may be |
| 5109 | specified multiple times and in conjunction |
| 5110 | with the --command (-x) option. |
| 5111 | |
| 5112 | * Deprecated commands removed |
| 5113 | |
| 5114 | The following commands, that were deprecated in 2000, have been |
| 5115 | removed: |
| 5116 | |
| 5117 | Command Replacement |
| 5118 | set|show arm disassembly-flavor set|show arm disassembler |
| 5119 | othernames set arm disassembler |
| 5120 | set|show remotedebug set|show debug remote |
| 5121 | set|show archdebug set|show debug arch |
| 5122 | set|show eventdebug set|show debug event |
| 5123 | regs info registers |
| 5124 | |
| 5125 | * New BSD user-level threads support |
| 5126 | |
| 5127 | It is now possible to debug programs using the user-level threads |
| 5128 | library on OpenBSD and FreeBSD. Currently supported (target) |
| 5129 | configurations are: |
| 5130 | |
| 5131 | FreeBSD/amd64 x86_64-*-freebsd* |
| 5132 | FreeBSD/i386 i386-*-freebsd* |
| 5133 | OpenBSD/i386 i386-*-openbsd* |
| 5134 | |
| 5135 | Note that the new kernel threads libraries introduced in FreeBSD 5.x |
| 5136 | are not yet supported. |
| 5137 | |
| 5138 | * New support for Matsushita MN10300 w/sim added |
| 5139 | (Work in progress). mn10300-elf. |
| 5140 | |
| 5141 | * REMOVED configurations and files |
| 5142 | |
| 5143 | VxWorks and the XDR protocol *-*-vxworks |
| 5144 | Motorola MCORE mcore-*-* |
| 5145 | National Semiconductor NS32000 ns32k-*-* |
| 5146 | |
| 5147 | * New "set print array-indexes" command |
| 5148 | |
| 5149 | After turning this setting "on", GDB prints the index of each element |
| 5150 | when displaying arrays. The default is "off" to preserve the previous |
| 5151 | behavior. |
| 5152 | |
| 5153 | * VAX floating point support |
| 5154 | |
| 5155 | GDB now supports the not-quite-ieee VAX F and D floating point formats. |
| 5156 | |
| 5157 | * User-defined command support |
| 5158 | |
| 5159 | In addition to using $arg0..$arg9 for argument passing, it is now possible |
| 5160 | to use $argc to determine now many arguments have been passed. See the |
| 5161 | section on user-defined commands in the user manual for more information. |
| 5162 | |
| 5163 | *** Changes in GDB 6.3: |
| 5164 | |
| 5165 | * New command line option |
| 5166 | |
| 5167 | GDB now accepts -l followed by a number to set the timeout for remote |
| 5168 | debugging. |
| 5169 | |
| 5170 | * GDB works with GCC -feliminate-dwarf2-dups |
| 5171 | |
| 5172 | GDB now supports a more compact representation of DWARF-2 debug |
| 5173 | information using DW_FORM_ref_addr references. These are produced |
| 5174 | by GCC with the option -feliminate-dwarf2-dups and also by some |
| 5175 | proprietary compilers. With GCC, you must use GCC 3.3.4 or later |
| 5176 | to use -feliminate-dwarf2-dups. |
| 5177 | |
| 5178 | * Internationalization |
| 5179 | |
| 5180 | When supported by the host system, GDB will be built with |
| 5181 | internationalization (libintl). The task of marking up the sources is |
| 5182 | continued, we're looking forward to our first translation. |
| 5183 | |
| 5184 | * Ada |
| 5185 | |
| 5186 | Initial support for debugging programs compiled with the GNAT |
| 5187 | implementation of the Ada programming language has been integrated |
| 5188 | into GDB. In this release, support is limited to expression evaluation. |
| 5189 | |
| 5190 | * New native configurations |
| 5191 | |
| 5192 | GNU/Linux/m32r m32r-*-linux-gnu |
| 5193 | |
| 5194 | * Remote 'p' packet |
| 5195 | |
| 5196 | GDB's remote protocol now includes support for the 'p' packet. This |
| 5197 | packet is used to fetch individual registers from a remote inferior. |
| 5198 | |
| 5199 | * END-OF-LIFE registers[] compatibility module |
| 5200 | |
| 5201 | GDB's internal register infrastructure has been completely rewritten. |
| 5202 | The new infrastructure making possible the implementation of key new |
| 5203 | features including 32x64 (e.g., 64-bit amd64 GDB debugging a 32-bit |
| 5204 | i386 application). |
| 5205 | |
| 5206 | GDB 6.3 will be the last release to include the registers[] |
| 5207 | compatibility module that allowed out-of-date configurations to |
| 5208 | continue to work. This change directly impacts the following |
| 5209 | configurations: |
| 5210 | |
| 5211 | hppa-*-hpux |
| 5212 | ia64-*-aix |
| 5213 | mips-*-irix* |
| 5214 | *-*-lynx |
| 5215 | mips-*-linux-gnu |
| 5216 | sds protocol |
| 5217 | xdr protocol |
| 5218 | powerpc bdm protocol |
| 5219 | |
| 5220 | Unless there is activity to revive these configurations, they will be |
| 5221 | made OBSOLETE in GDB 6.4, and REMOVED from GDB 6.5. |
| 5222 | |
| 5223 | * OBSOLETE configurations and files |
| 5224 | |
| 5225 | Configurations that have been declared obsolete in this release have |
| 5226 | been commented out. Unless there is activity to revive these |
| 5227 | configurations, the next release of GDB will have their sources |
| 5228 | permanently REMOVED. |
| 5229 | |
| 5230 | h8300-*-* |
| 5231 | mcore-*-* |
| 5232 | mn10300-*-* |
| 5233 | ns32k-*-* |
| 5234 | sh64-*-* |
| 5235 | v850-*-* |
| 5236 | |
| 5237 | *** Changes in GDB 6.2.1: |
| 5238 | |
| 5239 | * MIPS `break main; run' gave an heuristic-fence-post warning |
| 5240 | |
| 5241 | When attempting to run even a simple program, a warning about |
| 5242 | heuristic-fence-post being hit would be reported. This problem has |
| 5243 | been fixed. |
| 5244 | |
| 5245 | * MIPS IRIX 'long double' crashed GDB |
| 5246 | |
| 5247 | When examining a long double variable, GDB would get a segmentation |
| 5248 | fault. The crash has been fixed (but GDB 6.2 cannot correctly examine |
| 5249 | IRIX long double values). |
| 5250 | |
| 5251 | * VAX and "next" |
| 5252 | |
| 5253 | A bug in the VAX stack code was causing problems with the "next" |
| 5254 | command. This problem has been fixed. |
| 5255 | |
| 5256 | *** Changes in GDB 6.2: |
| 5257 | |
| 5258 | * Fix for ``many threads'' |
| 5259 | |
| 5260 | On GNU/Linux systems that use the NPTL threads library, a program |
| 5261 | rapidly creating and deleting threads would confuse GDB leading to the |
| 5262 | error message: |
| 5263 | |
| 5264 | ptrace: No such process. |
| 5265 | thread_db_get_info: cannot get thread info: generic error |
| 5266 | |
| 5267 | This problem has been fixed. |
| 5268 | |
| 5269 | * "-async" and "-noasync" options removed. |
| 5270 | |
| 5271 | Support for the broken "-noasync" option has been removed (it caused |
| 5272 | GDB to dump core). |
| 5273 | |
| 5274 | * New ``start'' command. |
| 5275 | |
| 5276 | This command runs the program until the begining of the main procedure. |
| 5277 | |
| 5278 | * New BSD Kernel Data Access Library (libkvm) interface |
| 5279 | |
| 5280 | Using ``target kvm'' it is now possible to debug kernel core dumps and |
| 5281 | live kernel memory images on various FreeBSD, NetBSD and OpenBSD |
| 5282 | platforms. Currently supported (native-only) configurations are: |
| 5283 | |
| 5284 | FreeBSD/amd64 x86_64-*-freebsd* |
| 5285 | FreeBSD/i386 i?86-*-freebsd* |
| 5286 | NetBSD/i386 i?86-*-netbsd* |
| 5287 | NetBSD/m68k m68*-*-netbsd* |
| 5288 | NetBSD/sparc sparc-*-netbsd* |
| 5289 | OpenBSD/amd64 x86_64-*-openbsd* |
| 5290 | OpenBSD/i386 i?86-*-openbsd* |
| 5291 | OpenBSD/m68k m68*-openbsd* |
| 5292 | OpenBSD/sparc sparc-*-openbsd* |
| 5293 | |
| 5294 | * Signal trampoline code overhauled |
| 5295 | |
| 5296 | Many generic problems with GDB's signal handling code have been fixed. |
| 5297 | These include: backtraces through non-contiguous stacks; recognition |
| 5298 | of sa_sigaction signal trampolines; backtrace from a NULL pointer |
| 5299 | call; backtrace through a signal trampoline; step into and out of |
| 5300 | signal handlers; and single-stepping in the signal trampoline. |
| 5301 | |
| 5302 | Please note that kernel bugs are a limiting factor here. These |
| 5303 | features have been shown to work on an s390 GNU/Linux system that |
| 5304 | include a 2.6.8-rc1 kernel. Ref PR breakpoints/1702. |
| 5305 | |
| 5306 | * Cygwin support for DWARF 2 added. |
| 5307 | |
| 5308 | * New native configurations |
| 5309 | |
| 5310 | GNU/Linux/hppa hppa*-*-linux* |
| 5311 | OpenBSD/hppa hppa*-*-openbsd* |
| 5312 | OpenBSD/m68k m68*-*-openbsd* |
| 5313 | OpenBSD/m88k m88*-*-openbsd* |
| 5314 | OpenBSD/powerpc powerpc-*-openbsd* |
| 5315 | NetBSD/vax vax-*-netbsd* |
| 5316 | OpenBSD/vax vax-*-openbsd* |
| 5317 | |
| 5318 | * END-OF-LIFE frame compatibility module |
| 5319 | |
| 5320 | GDB's internal frame infrastructure has been completely rewritten. |
| 5321 | The new infrastructure making it possible to support key new features |
| 5322 | including DWARF 2 Call Frame Information. To aid in the task of |
| 5323 | migrating old configurations to this new infrastructure, a |
| 5324 | compatibility module, that allowed old configurations to continue to |
| 5325 | work, was also included. |
| 5326 | |
| 5327 | GDB 6.2 will be the last release to include this frame compatibility |
| 5328 | module. This change directly impacts the following configurations: |
| 5329 | |
| 5330 | h8300-*-* |
| 5331 | mcore-*-* |
| 5332 | mn10300-*-* |
| 5333 | ns32k-*-* |
| 5334 | sh64-*-* |
| 5335 | v850-*-* |
| 5336 | xstormy16-*-* |
| 5337 | |
| 5338 | Unless there is activity to revive these configurations, they will be |
| 5339 | made OBSOLETE in GDB 6.3, and REMOVED from GDB 6.4. |
| 5340 | |
| 5341 | * REMOVED configurations and files |
| 5342 | |
| 5343 | Sun 3, running SunOS 3 m68*-*-sunos3* |
| 5344 | Sun 3, running SunOS 4 m68*-*-sunos4* |
| 5345 | Sun 2, running SunOS 3 m68000-*-sunos3* |
| 5346 | Sun 2, running SunOS 4 m68000-*-sunos4* |
| 5347 | Motorola 680x0 running LynxOS m68*-*-lynxos* |
| 5348 | AT&T 3b1/Unix pc m68*-att-* |
| 5349 | Bull DPX2 (68k, System V release 3) m68*-bull-sysv* |
| 5350 | decstation mips-dec-* mips-little-* |
| 5351 | riscos mips-*-riscos* mips-*-sysv* |
| 5352 | sonymips mips-sony-* |
| 5353 | sysv mips*-*-sysv4* (IRIX 5/6 not included) |
| 5354 | |
| 5355 | *** Changes in GDB 6.1.1: |
| 5356 | |
| 5357 | * TUI (Text-mode User Interface) built-in (also included in GDB 6.1) |
| 5358 | |
| 5359 | The TUI (Text-mode User Interface) is now built as part of a default |
| 5360 | GDB configuration. It is enabled by either selecting the TUI with the |
| 5361 | command line option "-i=tui" or by running the separate "gdbtui" |
| 5362 | program. For more information on the TUI, see the manual "Debugging |
| 5363 | with GDB". |
| 5364 | |
| 5365 | * Pending breakpoint support (also included in GDB 6.1) |
| 5366 | |
| 5367 | Support has been added to allow you to specify breakpoints in shared |
| 5368 | libraries that have not yet been loaded. If a breakpoint location |
| 5369 | cannot be found, and the "breakpoint pending" option is set to auto, |
| 5370 | GDB queries you if you wish to make the breakpoint pending on a future |
| 5371 | shared-library load. If and when GDB resolves the breakpoint symbol, |
| 5372 | the pending breakpoint is removed as one or more regular breakpoints |
| 5373 | are created. |
| 5374 | |
| 5375 | Pending breakpoints are very useful for GCJ Java debugging. |
| 5376 | |
| 5377 | * Fixed ISO-C build problems |
| 5378 | |
| 5379 | The files bfd/elf-bfd.h, gdb/dictionary.c and gdb/types.c contained |
| 5380 | non ISO-C code that stopped them being built using a more strict ISO-C |
| 5381 | compiler (e.g., IBM's C compiler). |
| 5382 | |
| 5383 | * Fixed build problem on IRIX 5 |
| 5384 | |
| 5385 | Due to header problems with <sys/proc.h>, the file gdb/proc-api.c |
| 5386 | wasn't able to compile compile on an IRIX 5 system. |
| 5387 | |
| 5388 | * Added execute permission to gdb/gdbserver/configure |
| 5389 | |
| 5390 | The shell script gdb/testsuite/gdb.stabs/configure lacked execute |
| 5391 | permission. This bug would cause configure to fail on a number of |
| 5392 | systems (Solaris, IRIX). Ref: server/519. |
| 5393 | |
| 5394 | * Fixed build problem on hpux2.0w-hp-hpux11.00 using the HP ANSI C compiler |
| 5395 | |
| 5396 | Older HPUX ANSI C compilers did not accept variable array sizes. somsolib.c |
| 5397 | has been updated to use constant array sizes. |
| 5398 | |
| 5399 | * Fixed a panic in the DWARF Call Frame Info code on Solaris 2.7 |
| 5400 | |
| 5401 | GCC 3.3.2, on Solaris 2.7, includes the DW_EH_PE_funcrel encoding in |
| 5402 | its generated DWARF Call Frame Info. This encoding was causing GDB to |
| 5403 | panic, that panic has been fixed. Ref: gdb/1628. |
| 5404 | |
| 5405 | * Fixed a problem when examining parameters in shared library code. |
| 5406 | |
| 5407 | When examining parameters in optimized shared library code generated |
| 5408 | by a mainline GCC, GDB would incorrectly report ``Variable "..." is |
| 5409 | not available''. GDB now correctly displays the variable's value. |
| 5410 | |
| 5411 | *** Changes in GDB 6.1: |
| 5412 | |
| 5413 | * Removed --with-mmalloc |
| 5414 | |
| 5415 | Support for the mmalloc memory manager has been removed, as it |
| 5416 | conflicted with the internal gdb byte cache. |
| 5417 | |
| 5418 | * Changes in AMD64 configurations |
| 5419 | |
| 5420 | The AMD64 target now includes the %cs and %ss registers. As a result |
| 5421 | the AMD64 remote protocol has changed; this affects the floating-point |
| 5422 | and SSE registers. If you rely on those registers for your debugging, |
| 5423 | you should upgrade gdbserver on the remote side. |
| 5424 | |
| 5425 | * Revised SPARC target |
| 5426 | |
| 5427 | The SPARC target has been completely revised, incorporating the |
| 5428 | FreeBSD/sparc64 support that was added for GDB 6.0. As a result |
| 5429 | support for LynxOS and SunOS 4 has been dropped. Calling functions |
| 5430 | from within GDB on operating systems with a non-executable stack |
| 5431 | (Solaris, OpenBSD) now works. |
| 5432 | |
| 5433 | * New C++ demangler |
| 5434 | |
| 5435 | GDB has a new C++ demangler which does a better job on the mangled |
| 5436 | names generated by current versions of g++. It also runs faster, so |
| 5437 | with this and other changes gdb should now start faster on large C++ |
| 5438 | programs. |
| 5439 | |
| 5440 | * DWARF 2 Location Expressions |
| 5441 | |
| 5442 | GDB support for location expressions has been extended to support function |
| 5443 | arguments and frame bases. Older versions of GDB could crash when they |
| 5444 | encountered these. |
| 5445 | |
| 5446 | * C++ nested types and namespaces |
| 5447 | |
| 5448 | GDB's support for nested types and namespaces in C++ has been |
| 5449 | improved, especially if you use the DWARF 2 debugging format. (This |
| 5450 | is the default for recent versions of GCC on most platforms.) |
| 5451 | Specifically, if you have a class "Inner" defined within a class or |
| 5452 | namespace "Outer", then GDB realizes that the class's name is |
| 5453 | "Outer::Inner", not simply "Inner". This should greatly reduce the |
| 5454 | frequency of complaints about not finding RTTI symbols. In addition, |
| 5455 | if you are stopped at inside of a function defined within a namespace, |
| 5456 | GDB modifies its name lookup accordingly. |
| 5457 | |
| 5458 | * New native configurations |
| 5459 | |
| 5460 | NetBSD/amd64 x86_64-*-netbsd* |
| 5461 | OpenBSD/amd64 x86_64-*-openbsd* |
| 5462 | OpenBSD/alpha alpha*-*-openbsd* |
| 5463 | OpenBSD/sparc sparc-*-openbsd* |
| 5464 | OpenBSD/sparc64 sparc64-*-openbsd* |
| 5465 | |
| 5466 | * New debugging protocols |
| 5467 | |
| 5468 | M32R with SDI protocol m32r-*-elf* |
| 5469 | |
| 5470 | * "set prompt-escape-char" command deleted. |
| 5471 | |
| 5472 | The command "set prompt-escape-char" has been deleted. This command, |
| 5473 | and its very obscure effet on GDB's prompt, was never documented, |
| 5474 | tested, nor mentioned in the NEWS file. |
| 5475 | |
| 5476 | * OBSOLETE configurations and files |
| 5477 | |
| 5478 | Configurations that have been declared obsolete in this release have |
| 5479 | been commented out. Unless there is activity to revive these |
| 5480 | configurations, the next release of GDB will have their sources |
| 5481 | permanently REMOVED. |
| 5482 | |
| 5483 | Sun 3, running SunOS 3 m68*-*-sunos3* |
| 5484 | Sun 3, running SunOS 4 m68*-*-sunos4* |
| 5485 | Sun 2, running SunOS 3 m68000-*-sunos3* |
| 5486 | Sun 2, running SunOS 4 m68000-*-sunos4* |
| 5487 | Motorola 680x0 running LynxOS m68*-*-lynxos* |
| 5488 | AT&T 3b1/Unix pc m68*-att-* |
| 5489 | Bull DPX2 (68k, System V release 3) m68*-bull-sysv* |
| 5490 | decstation mips-dec-* mips-little-* |
| 5491 | riscos mips-*-riscos* mips-*-sysv* |
| 5492 | sonymips mips-sony-* |
| 5493 | sysv mips*-*-sysv4* (IRIX 5/6 not included) |
| 5494 | |
| 5495 | * REMOVED configurations and files |
| 5496 | |
| 5497 | SGI Irix-4.x mips-sgi-irix4 or iris4 |
| 5498 | SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris |
| 5499 | Z8000 simulator z8k-zilog-none or z8ksim |
| 5500 | Matsushita MN10200 w/simulator mn10200-*-* |
| 5501 | H8/500 simulator h8500-hitachi-hms or h8500hms |
| 5502 | HP/PA running BSD hppa*-*-bsd* |
| 5503 | HP/PA running OSF/1 hppa*-*-osf* |
| 5504 | HP/PA Pro target hppa*-*-pro* |
| 5505 | PMAX (MIPS) running Mach 3.0 mips*-*-mach3* |
| 5506 | 386BSD i[3456]86-*-bsd* |
| 5507 | Sequent family i[3456]86-sequent-sysv4* |
| 5508 | i[3456]86-sequent-sysv* |
| 5509 | i[3456]86-sequent-bsd* |
| 5510 | SPARC running LynxOS sparc-*-lynxos* |
| 5511 | SPARC running SunOS 4 sparc-*-sunos4* |
| 5512 | Tsqware Sparclet sparclet-*-* |
| 5513 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite |
| 5514 | |
| 5515 | *** Changes in GDB 6.0: |
| 5516 | |
| 5517 | * Objective-C |
| 5518 | |
| 5519 | Support for debugging the Objective-C programming language has been |
| 5520 | integrated into GDB. |
| 5521 | |
| 5522 | * New backtrace mechanism (includes DWARF 2 Call Frame Information). |
| 5523 | |
| 5524 | DWARF 2's Call Frame Information makes available compiler generated |
| 5525 | information that more exactly describes the program's run-time stack. |
| 5526 | By using this information, GDB is able to provide more robust stack |
| 5527 | backtraces. |
| 5528 | |
| 5529 | The i386, amd64 (nee, x86-64), Alpha, m68hc11, ia64, and m32r targets |
| 5530 | have been updated to use a new backtrace mechanism which includes |
| 5531 | DWARF 2 CFI support. |
| 5532 | |
| 5533 | * Hosted file I/O. |
| 5534 | |
| 5535 | GDB's remote protocol has been extended to include support for hosted |
| 5536 | file I/O (where the remote target uses GDB's file system). See GDB's |
| 5537 | remote protocol documentation for details. |
| 5538 | |
| 5539 | * All targets using the new architecture framework. |
| 5540 | |
| 5541 | All of GDB's targets have been updated to use the new internal |
| 5542 | architecture framework. The way is now open for future GDB releases |
| 5543 | to include cross-architecture native debugging support (i386 on amd64, |
| 5544 | ppc32 on ppc64). |
| 5545 | |
| 5546 | * GNU/Linux's Thread Local Storage (TLS) |
| 5547 | |
| 5548 | GDB now includes support for for the GNU/Linux implementation of |
| 5549 | per-thread variables. |
| 5550 | |
| 5551 | * GNU/Linux's Native POSIX Thread Library (NPTL) |
| 5552 | |
| 5553 | GDB's thread code has been updated to work with either the new |
| 5554 | GNU/Linux NPTL thread library or the older "LinuxThreads" library. |
| 5555 | |
| 5556 | * Separate debug info. |
| 5557 | |
| 5558 | GDB, in conjunction with BINUTILS, now supports a mechanism for |
| 5559 | automatically loading debug information from a separate file. Instead |
| 5560 | of shipping full debug and non-debug versions of system libraries, |
| 5561 | system integrators can now instead ship just the stripped libraries |
| 5562 | and optional debug files. |
| 5563 | |
| 5564 | * DWARF 2 Location Expressions |
| 5565 | |
| 5566 | DWARF 2 Location Expressions allow the compiler to more completely |
| 5567 | describe the location of variables (even in optimized code) to the |
| 5568 | debugger. |
| 5569 | |
| 5570 | GDB now includes preliminary support for location expressions (support |
| 5571 | for DW_OP_piece is still missing). |
| 5572 | |
| 5573 | * Java |
| 5574 | |
| 5575 | A number of long standing bugs that caused GDB to die while starting a |
| 5576 | Java application have been fixed. GDB's Java support is now |
| 5577 | considered "useable". |
| 5578 | |
| 5579 | * GNU/Linux support for fork, vfork, and exec. |
| 5580 | |
| 5581 | The "catch fork", "catch exec", "catch vfork", and "set follow-fork-mode" |
| 5582 | commands are now implemented for GNU/Linux. They require a 2.5.x or later |
| 5583 | kernel. |
| 5584 | |
| 5585 | * GDB supports logging output to a file |
| 5586 | |
| 5587 | There are two new commands, "set logging" and "show logging", which can be |
| 5588 | used to capture GDB's output to a file. |
| 5589 | |
| 5590 | * The meaning of "detach" has changed for gdbserver |
| 5591 | |
| 5592 | The "detach" command will now resume the application, as documented. To |
| 5593 | disconnect from gdbserver and leave it stopped, use the new "disconnect" |
| 5594 | command. |
| 5595 | |
| 5596 | * d10v, m68hc11 `regs' command deprecated |
| 5597 | |
| 5598 | The `info registers' command has been updated so that it displays the |
| 5599 | registers using a format identical to the old `regs' command. |
| 5600 | |
| 5601 | * Profiling support |
| 5602 | |
| 5603 | A new command, "maint set profile on/off", has been added. This command can |
| 5604 | be used to enable or disable profiling while running GDB, to profile a |
| 5605 | session or a set of commands. In addition there is a new configure switch, |
| 5606 | "--enable-profiling", which will cause GDB to be compiled with profiling |
| 5607 | data, for more informative profiling results. |
| 5608 | |
| 5609 | * Default MI syntax changed to "mi2". |
| 5610 | |
| 5611 | The default MI (machine interface) syntax, enabled by the command line |
| 5612 | option "-i=mi", has been changed to "mi2". The previous MI syntax, |
| 5613 | "mi1", can be enabled by specifying the option "-i=mi1". |
| 5614 | |
| 5615 | Support for the original "mi0" syntax (included in GDB 5.0) has been |
| 5616 | removed. |
| 5617 | |
| 5618 | Fix for gdb/192: removed extraneous space when displaying frame level. |
| 5619 | Fix for gdb/672: update changelist is now output in mi list format. |
| 5620 | Fix for gdb/702: a -var-assign that updates the value now shows up |
| 5621 | in a subsequent -var-update. |
| 5622 | |
| 5623 | * New native configurations. |
| 5624 | |
| 5625 | FreeBSD/amd64 x86_64-*-freebsd* |
| 5626 | |
| 5627 | * Multi-arched targets. |
| 5628 | |
| 5629 | HP/PA HPUX11 hppa*-*-hpux* |
| 5630 | Renesas M32R/D w/simulator m32r-*-elf* |
| 5631 | |
| 5632 | * OBSOLETE configurations and files |
| 5633 | |
| 5634 | Configurations that have been declared obsolete in this release have |
| 5635 | been commented out. Unless there is activity to revive these |
| 5636 | configurations, the next release of GDB will have their sources |
| 5637 | permanently REMOVED. |
| 5638 | |
| 5639 | Z8000 simulator z8k-zilog-none or z8ksim |
| 5640 | Matsushita MN10200 w/simulator mn10200-*-* |
| 5641 | H8/500 simulator h8500-hitachi-hms or h8500hms |
| 5642 | HP/PA running BSD hppa*-*-bsd* |
| 5643 | HP/PA running OSF/1 hppa*-*-osf* |
| 5644 | HP/PA Pro target hppa*-*-pro* |
| 5645 | PMAX (MIPS) running Mach 3.0 mips*-*-mach3* |
| 5646 | Sequent family i[3456]86-sequent-sysv4* |
| 5647 | i[3456]86-sequent-sysv* |
| 5648 | i[3456]86-sequent-bsd* |
| 5649 | Tsqware Sparclet sparclet-*-* |
| 5650 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite |
| 5651 | |
| 5652 | * REMOVED configurations and files |
| 5653 | |
| 5654 | V850EA ISA |
| 5655 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 |
| 5656 | IBM AIX PS/2 i[3456]86-*-aix |
| 5657 | i386 running Mach 3.0 i[3456]86-*-mach3* |
| 5658 | i386 running Mach i[3456]86-*-mach* |
| 5659 | i386 running OSF/1 i[3456]86-*osf1mk* |
| 5660 | HP/Apollo 68k Family m68*-apollo*-sysv*, |
| 5661 | m68*-apollo*-bsd*, |
| 5662 | m68*-hp-bsd*, m68*-hp-hpux* |
| 5663 | Argonaut Risc Chip (ARC) arc-*-* |
| 5664 | Mitsubishi D30V d30v-*-* |
| 5665 | Fujitsu FR30 fr30-*-elf* |
| 5666 | OS/9000 i[34]86-*-os9k |
| 5667 | I960 with MON960 i960-*-coff |
| 5668 | |
| 5669 | * MIPS $fp behavior changed |
| 5670 | |
| 5671 | The convenience variable $fp, for the MIPS, now consistently returns |
| 5672 | the address of the current frame's base. Previously, depending on the |
| 5673 | context, $fp could refer to either $sp or the current frame's base |
| 5674 | address. See ``8.10 Registers'' in the manual ``Debugging with GDB: |
| 5675 | The GNU Source-Level Debugger''. |
| 5676 | |
| 5677 | *** Changes in GDB 5.3: |
| 5678 | |
| 5679 | * GNU/Linux shared library multi-threaded performance improved. |
| 5680 | |
| 5681 | When debugging a multi-threaded application on GNU/Linux, GDB now uses |
| 5682 | `/proc', in preference to `ptrace' for memory reads. This may result |
| 5683 | in an improvement in the start-up time of multi-threaded, shared |
| 5684 | library applications when run under GDB. One GDB user writes: ``loads |
| 5685 | shared libs like mad''. |
| 5686 | |
| 5687 | * ``gdbserver'' now supports multi-threaded applications on some targets |
| 5688 | |
| 5689 | Support for debugging multi-threaded applications which use |
| 5690 | the GNU/Linux LinuxThreads package has been added for |
| 5691 | arm*-*-linux*-gnu*, i[3456]86-*-linux*-gnu*, mips*-*-linux*-gnu*, |
| 5692 | powerpc*-*-linux*-gnu*, and sh*-*-linux*-gnu*. |
| 5693 | |
| 5694 | * GDB now supports C/C++ preprocessor macros. |
| 5695 | |
| 5696 | GDB now expands preprocessor macro invocations in C/C++ expressions, |
| 5697 | and provides various commands for showing macro definitions and how |
| 5698 | they expand. |
| 5699 | |
| 5700 | The new command `macro expand EXPRESSION' expands any macro |
| 5701 | invocations in expression, and shows the result. |
| 5702 | |
| 5703 | The new command `show macro MACRO-NAME' shows the definition of the |
| 5704 | macro named MACRO-NAME, and where it was defined. |
| 5705 | |
| 5706 | Most compilers don't include information about macros in the debugging |
| 5707 | information by default. In GCC 3.1, for example, you need to compile |
| 5708 | your program with the options `-gdwarf-2 -g3'. If the macro |
| 5709 | information is present in the executable, GDB will read it. |
| 5710 | |
| 5711 | * Multi-arched targets. |
| 5712 | |
| 5713 | DEC Alpha (partial) alpha*-*-* |
| 5714 | DEC VAX (partial) vax-*-* |
| 5715 | NEC V850 v850-*-* |
| 5716 | National Semiconductor NS32000 (partial) ns32k-*-* |
| 5717 | Motorola 68000 (partial) m68k-*-* |
| 5718 | Motorola MCORE mcore-*-* |
| 5719 | |
| 5720 | * New targets. |
| 5721 | |
| 5722 | Fujitsu FRV architecture added by Red Hat frv*-*-* |
| 5723 | |
| 5724 | |
| 5725 | * New native configurations |
| 5726 | |
| 5727 | Alpha NetBSD alpha*-*-netbsd* |
| 5728 | SH NetBSD sh*-*-netbsdelf* |
| 5729 | MIPS NetBSD mips*-*-netbsd* |
| 5730 | UltraSPARC NetBSD sparc64-*-netbsd* |
| 5731 | |
| 5732 | * OBSOLETE configurations and files |
| 5733 | |
| 5734 | Configurations that have been declared obsolete in this release have |
| 5735 | been commented out. Unless there is activity to revive these |
| 5736 | configurations, the next release of GDB will have their sources |
| 5737 | permanently REMOVED. |
| 5738 | |
| 5739 | Mitsubishi D30V d30v-*-* |
| 5740 | OS/9000 i[34]86-*-os9k |
| 5741 | IBM AIX PS/2 i[3456]86-*-aix |
| 5742 | Fujitsu FR30 fr30-*-elf* |
| 5743 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 |
| 5744 | Argonaut Risc Chip (ARC) arc-*-* |
| 5745 | i386 running Mach 3.0 i[3456]86-*-mach3* |
| 5746 | i386 running Mach i[3456]86-*-mach* |
| 5747 | i386 running OSF/1 i[3456]86-*osf1mk* |
| 5748 | HP/Apollo 68k Family m68*-apollo*-sysv*, |
| 5749 | m68*-apollo*-bsd*, |
| 5750 | m68*-hp-bsd*, m68*-hp-hpux* |
| 5751 | I960 with MON960 i960-*-coff |
| 5752 | |
| 5753 | * OBSOLETE languages |
| 5754 | |
| 5755 | CHILL, a Pascal like language used by telecommunications companies. |
| 5756 | |
| 5757 | * REMOVED configurations and files |
| 5758 | |
| 5759 | AMD 29k family via UDI a29k-amd-udi, udi29k |
| 5760 | A29K VxWorks a29k-*-vxworks |
| 5761 | AMD 29000 embedded, using EBMON a29k-none-none |
| 5762 | AMD 29000 embedded with COFF a29k-none-coff |
| 5763 | AMD 29000 embedded with a.out a29k-none-aout |
| 5764 | |
| 5765 | testsuite/gdb.hp/gdb.threads-hp/ directory |
| 5766 | |
| 5767 | * New command "set max-user-call-depth <nnn>" |
| 5768 | |
| 5769 | This command allows the user to limit the call depth of user-defined |
| 5770 | commands. The default is 1024. |
| 5771 | |
| 5772 | * Changes in FreeBSD/i386 native debugging. |
| 5773 | |
| 5774 | Support for the "generate-core-file" has been added. |
| 5775 | |
| 5776 | * New commands "dump", "append", and "restore". |
| 5777 | |
| 5778 | These commands allow data to be copied from target memory |
| 5779 | to a bfd-format or binary file (dump and append), and back |
| 5780 | from a file into memory (restore). |
| 5781 | |
| 5782 | * Improved "next/step" support on multi-processor Alpha Tru64. |
| 5783 | |
| 5784 | The previous single-step mechanism could cause unpredictable problems, |
| 5785 | including the random appearance of SIGSEGV or SIGTRAP signals. The use |
| 5786 | of a software single-step mechanism prevents this. |
| 5787 | |
| 5788 | *** Changes in GDB 5.2.1: |
| 5789 | |
| 5790 | * New targets. |
| 5791 | |
| 5792 | Atmel AVR avr*-*-* |
| 5793 | |
| 5794 | * Bug fixes |
| 5795 | |
| 5796 | gdb/182: gdb/323: gdb/237: On alpha, gdb was reporting: |
| 5797 | mdebugread.c:2443: gdb-internal-error: sect_index_data not initialized |
| 5798 | Fix, by Joel Brobecker imported from mainline. |
| 5799 | |
| 5800 | gdb/439: gdb/291: On some ELF object files, gdb was reporting: |
| 5801 | dwarf2read.c:1072: gdb-internal-error: sect_index_text not initialize |
| 5802 | Fix, by Fred Fish, imported from mainline. |
| 5803 | |
| 5804 | Dwarf2 .debug_frame & .eh_frame handler improved in many ways. |
| 5805 | Surprisingly enough, it works now. |
| 5806 | By Michal Ludvig, imported from mainline. |
| 5807 | |
| 5808 | i386 hardware watchpoint support: |
| 5809 | avoid misses on second run for some targets. |
| 5810 | By Pierre Muller, imported from mainline. |
| 5811 | |
| 5812 | *** Changes in GDB 5.2: |
| 5813 | |
| 5814 | * New command "set trust-readonly-sections on[off]". |
| 5815 | |
| 5816 | This command is a hint that tells gdb that read-only sections |
| 5817 | really are read-only (ie. that their contents will not change). |
| 5818 | In this mode, gdb will go to the object file rather than the |
| 5819 | target to read memory from read-only sections (such as ".text"). |
| 5820 | This can be a significant performance improvement on some |
| 5821 | (notably embedded) targets. |
| 5822 | |
| 5823 | * New command "generate-core-file" (or "gcore"). |
| 5824 | |
| 5825 | This new gdb command allows the user to drop a core file of the child |
| 5826 | process state at any time. So far it's been implemented only for |
| 5827 | GNU/Linux and Solaris, but should be relatively easily ported to other |
| 5828 | hosts. Argument is core file name (defaults to core.<pid>). |
| 5829 | |
| 5830 | * New command line option |
| 5831 | |
| 5832 | GDB now accepts --pid or -p followed by a process id. |
| 5833 | |
| 5834 | * Change in command line behavior -- corefiles vs. process ids. |
| 5835 | |
| 5836 | There is a subtle behavior in the way in which GDB handles |
| 5837 | command line arguments. The first non-flag argument is always |
| 5838 | a program to debug, but the second non-flag argument may either |
| 5839 | be a corefile or a process id. Previously, GDB would attempt to |
| 5840 | open the second argument as a corefile, and if that failed, would |
| 5841 | issue a superfluous error message and then attempt to attach it as |
| 5842 | a process. Now, if the second argument begins with a non-digit, |
| 5843 | it will be treated as a corefile. If it begins with a digit, |
| 5844 | GDB will attempt to attach it as a process, and if no such process |
| 5845 | is found, will then attempt to open it as a corefile. |
| 5846 | |
| 5847 | * Changes in ARM configurations. |
| 5848 | |
| 5849 | Multi-arch support is enabled for all ARM configurations. The ARM/NetBSD |
| 5850 | configuration is fully multi-arch. |
| 5851 | |
| 5852 | * New native configurations |
| 5853 | |
| 5854 | ARM NetBSD arm*-*-netbsd* |
| 5855 | x86 OpenBSD i[3456]86-*-openbsd* |
| 5856 | AMD x86-64 running GNU/Linux x86_64-*-linux-* |
| 5857 | Sparc64 running FreeBSD sparc64-*-freebsd* |
| 5858 | |
| 5859 | * New targets |
| 5860 | |
| 5861 | Sanyo XStormy16 xstormy16-elf |
| 5862 | |
| 5863 | * OBSOLETE configurations and files |
| 5864 | |
| 5865 | Configurations that have been declared obsolete in this release have |
| 5866 | been commented out. Unless there is activity to revive these |
| 5867 | configurations, the next release of GDB will have their sources |
| 5868 | permanently REMOVED. |
| 5869 | |
| 5870 | AMD 29k family via UDI a29k-amd-udi, udi29k |
| 5871 | A29K VxWorks a29k-*-vxworks |
| 5872 | AMD 29000 embedded, using EBMON a29k-none-none |
| 5873 | AMD 29000 embedded with COFF a29k-none-coff |
| 5874 | AMD 29000 embedded with a.out a29k-none-aout |
| 5875 | |
| 5876 | testsuite/gdb.hp/gdb.threads-hp/ directory |
| 5877 | |
| 5878 | * REMOVED configurations and files |
| 5879 | |
| 5880 | TI TMS320C80 tic80-*-* |
| 5881 | WDC 65816 w65-*-* |
| 5882 | PowerPC Solaris powerpcle-*-solaris* |
| 5883 | PowerPC Windows NT powerpcle-*-cygwin32 |
| 5884 | PowerPC Netware powerpc-*-netware* |
| 5885 | Harris/CXUX m88k m88*-harris-cxux* |
| 5886 | Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* |
| 5887 | ns32k-utek-sysv* ns32k-utek-* |
| 5888 | SunOS 4.0.Xi on i386 i[3456]86-*-sunos* |
| 5889 | Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* |
| 5890 | Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news |
| 5891 | ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* |
| 5892 | Apple Macintosh (MPW) host and target N/A host, powerpc-*-macos* |
| 5893 | |
| 5894 | * Changes to command line processing |
| 5895 | |
| 5896 | The new `--args' feature can be used to specify command-line arguments |
| 5897 | for the inferior from gdb's command line. |
| 5898 | |
| 5899 | * Changes to key bindings |
| 5900 | |
| 5901 | There is a new `operate-and-get-next' function bound to `C-o'. |
| 5902 | |
| 5903 | *** Changes in GDB 5.1.1 |
| 5904 | |
| 5905 | Fix compile problem on DJGPP. |
| 5906 | |
| 5907 | Fix a problem with floating-point registers on the i386 being |
| 5908 | corrupted. |
| 5909 | |
| 5910 | Fix to stop GDB crashing on .debug_str debug info. |
| 5911 | |
| 5912 | Numerous documentation fixes. |
| 5913 | |
| 5914 | Numerous testsuite fixes. |
| 5915 | |
| 5916 | *** Changes in GDB 5.1: |
| 5917 | |
| 5918 | * New native configurations |
| 5919 | |
| 5920 | Alpha FreeBSD alpha*-*-freebsd* |
| 5921 | x86 FreeBSD 3.x and 4.x i[3456]86*-freebsd[34]* |
| 5922 | MIPS GNU/Linux mips*-*-linux* |
| 5923 | MIPS SGI Irix 6.x mips*-sgi-irix6* |
| 5924 | ia64 AIX ia64-*-aix* |
| 5925 | s390 and s390x GNU/Linux {s390,s390x}-*-linux* |
| 5926 | |
| 5927 | * New targets |
| 5928 | |
| 5929 | Motorola 68HC11 and 68HC12 m68hc11-elf |
| 5930 | CRIS cris-axis |
| 5931 | UltraSparc running GNU/Linux sparc64-*-linux* |
| 5932 | |
| 5933 | * OBSOLETE configurations and files |
| 5934 | |
| 5935 | x86 FreeBSD before 2.2 i[3456]86*-freebsd{1,2.[01]}*, |
| 5936 | Harris/CXUX m88k m88*-harris-cxux* |
| 5937 | Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* |
| 5938 | ns32k-utek-sysv* ns32k-utek-* |
| 5939 | TI TMS320C80 tic80-*-* |
| 5940 | WDC 65816 w65-*-* |
| 5941 | Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* |
| 5942 | PowerPC Solaris powerpcle-*-solaris* |
| 5943 | PowerPC Windows NT powerpcle-*-cygwin32 |
| 5944 | PowerPC Netware powerpc-*-netware* |
| 5945 | SunOS 4.0.Xi on i386 i[3456]86-*-sunos* |
| 5946 | Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news |
| 5947 | ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* |
| 5948 | Apple Macintosh (MPW) host N/A |
| 5949 | |
| 5950 | stuff.c (Program to stuff files into a specially prepared space in kdb) |
| 5951 | kdb-start.c (Main loop for the standalone kernel debugger) |
| 5952 | |
| 5953 | Configurations that have been declared obsolete in this release have |
| 5954 | been commented out. Unless there is activity to revive these |
| 5955 | configurations, the next release of GDB will have their sources |
| 5956 | permanently REMOVED. |
| 5957 | |
| 5958 | * REMOVED configurations and files |
| 5959 | |
| 5960 | Altos 3068 m68*-altos-* |
| 5961 | Convex c1-*-*, c2-*-* |
| 5962 | Pyramid pyramid-*-* |
| 5963 | ARM RISCix arm-*-* (as host) |
| 5964 | Tahoe tahoe-*-* |
| 5965 | ser-ocd.c *-*-* |
| 5966 | |
| 5967 | * GDB has been converted to ISO C. |
| 5968 | |
| 5969 | GDB's source code has been converted to ISO C. In particular, the |
| 5970 | sources are fully protoized, and rely on standard headers being |
| 5971 | present. |
| 5972 | |
| 5973 | * Other news: |
| 5974 | |
| 5975 | * "info symbol" works on platforms which use COFF, ECOFF, XCOFF, and NLM. |
| 5976 | |
| 5977 | * The MI enabled by default. |
| 5978 | |
| 5979 | The new machine oriented interface (MI) introduced in GDB 5.0 has been |
| 5980 | revised and enabled by default. Packages which use GDB as a debugging |
| 5981 | engine behind a UI or another front end are encouraged to switch to |
| 5982 | using the GDB/MI interface, instead of the old annotations interface |
| 5983 | which is now deprecated. |
| 5984 | |
| 5985 | * Support for debugging Pascal programs. |
| 5986 | |
| 5987 | GDB now includes support for debugging Pascal programs. The following |
| 5988 | main features are supported: |
| 5989 | |
| 5990 | - Pascal-specific data types such as sets; |
| 5991 | |
| 5992 | - automatic recognition of Pascal sources based on file-name |
| 5993 | extension; |
| 5994 | |
| 5995 | - Pascal-style display of data types, variables, and functions; |
| 5996 | |
| 5997 | - a Pascal expression parser. |
| 5998 | |
| 5999 | However, some important features are not yet supported. |
| 6000 | |
| 6001 | - Pascal string operations are not supported at all; |
| 6002 | |
| 6003 | - there are some problems with boolean types; |
| 6004 | |
| 6005 | - Pascal type hexadecimal constants are not supported |
| 6006 | because they conflict with the internal variables format; |
| 6007 | |
| 6008 | - support for Pascal objects and classes is not full yet; |
| 6009 | |
| 6010 | - unlike Pascal, GDB is case-sensitive for symbol names. |
| 6011 | |
| 6012 | * Changes in completion. |
| 6013 | |
| 6014 | Commands such as `shell', `run' and `set args', which pass arguments |
| 6015 | to inferior programs, now complete on file names, similar to what |
| 6016 | users expect at the shell prompt. |
| 6017 | |
| 6018 | Commands which accept locations, such as `disassemble', `print', |
| 6019 | `breakpoint', `until', etc. now complete on filenames as well as |
| 6020 | program symbols. Thus, if you type "break foob TAB", and the source |
| 6021 | files linked into the programs include `foobar.c', that file name will |
| 6022 | be one of the candidates for completion. However, file names are not |
| 6023 | considered for completion after you typed a colon that delimits a file |
| 6024 | name from a name of a function in that file, as in "break foo.c:bar". |
| 6025 | |
| 6026 | `set demangle-style' completes on available demangling styles. |
| 6027 | |
| 6028 | * New platform-independent commands: |
| 6029 | |
| 6030 | It is now possible to define a post-hook for a command as well as a |
| 6031 | hook that runs before the command. For more details, see the |
| 6032 | documentation of `hookpost' in the GDB manual. |
| 6033 | |
| 6034 | * Changes in GNU/Linux native debugging. |
| 6035 | |
| 6036 | Support for debugging multi-threaded programs has been completely |
| 6037 | revised for all platforms except m68k and sparc. You can now debug as |
| 6038 | many threads as your system allows you to have. |
| 6039 | |
| 6040 | Attach/detach is supported for multi-threaded programs. |
| 6041 | |
| 6042 | Support for SSE registers was added for x86. This doesn't work for |
| 6043 | multi-threaded programs though. |
| 6044 | |
| 6045 | * Changes in MIPS configurations. |
| 6046 | |
| 6047 | Multi-arch support is enabled for all MIPS configurations. |
| 6048 | |
| 6049 | GDB can now be built as native debugger on SGI Irix 6.x systems for |
| 6050 | debugging n32 executables. (Debugging 64-bit executables is not yet |
| 6051 | supported.) |
| 6052 | |
| 6053 | * Unified support for hardware watchpoints in all x86 configurations. |
| 6054 | |
| 6055 | Most (if not all) native x86 configurations support hardware-assisted |
| 6056 | breakpoints and watchpoints in a unified manner. This support |
| 6057 | implements debug register sharing between watchpoints, which allows to |
| 6058 | put a virtually infinite number of watchpoints on the same address, |
| 6059 | and also supports watching regions up to 16 bytes with several debug |
| 6060 | registers. |
| 6061 | |
| 6062 | The new maintenance command `maintenance show-debug-regs' toggles |
| 6063 | debugging print-outs in functions that insert, remove, and test |
| 6064 | watchpoints and hardware breakpoints. |
| 6065 | |
| 6066 | * Changes in the DJGPP native configuration. |
| 6067 | |
| 6068 | New command ``info dos sysinfo'' displays assorted information about |
| 6069 | the CPU, OS, memory, and DPMI server. |
| 6070 | |
| 6071 | New commands ``info dos gdt'', ``info dos ldt'', and ``info dos idt'' |
| 6072 | display information about segment descriptors stored in GDT, LDT, and |
| 6073 | IDT. |
| 6074 | |
| 6075 | New commands ``info dos pde'' and ``info dos pte'' display entries |
| 6076 | from Page Directory and Page Tables (for now works with CWSDPMI only). |
| 6077 | New command ``info dos address-pte'' displays the Page Table entry for |
| 6078 | a given linear address. |
| 6079 | |
| 6080 | GDB can now pass command lines longer than 126 characters to the |
| 6081 | program being debugged (requires an update to the libdbg.a library |
| 6082 | which is part of the DJGPP development kit). |
| 6083 | |
| 6084 | DWARF2 debug info is now supported. |
| 6085 | |
| 6086 | It is now possible to `step' and `next' through calls to `longjmp'. |
| 6087 | |
| 6088 | * Changes in documentation. |
| 6089 | |
| 6090 | All GDB documentation was converted to GFDL, the GNU Free |
| 6091 | Documentation License. |
| 6092 | |
| 6093 | Tracepoints-related commands are now fully documented in the GDB |
| 6094 | manual. |
| 6095 | |
| 6096 | TUI, the Text-mode User Interface, is now documented in the manual. |
| 6097 | |
| 6098 | Tracepoints-related commands are now fully documented in the GDB |
| 6099 | manual. |
| 6100 | |
| 6101 | The "GDB Internals" manual now has an index. It also includes |
| 6102 | documentation of `ui_out' functions, GDB coding standards, x86 |
| 6103 | hardware watchpoints, and memory region attributes. |
| 6104 | |
| 6105 | * GDB's version number moved to ``version.in'' |
| 6106 | |
| 6107 | The Makefile variable VERSION has been replaced by the file |
| 6108 | ``version.in''. People creating GDB distributions should update the |
| 6109 | contents of this file. |
| 6110 | |
| 6111 | * gdba.el deleted |
| 6112 | |
| 6113 | GUD support is now a standard part of the EMACS distribution. |
| 6114 | |
| 6115 | *** Changes in GDB 5.0: |
| 6116 | |
| 6117 | * Improved support for debugging FP programs on x86 targets |
| 6118 | |
| 6119 | Unified and much-improved support for debugging floating-point |
| 6120 | programs on all x86 targets. In particular, ``info float'' now |
| 6121 | displays the FP registers in the same format on all x86 targets, with |
| 6122 | greater level of detail. |
| 6123 | |
| 6124 | * Improvements and bugfixes in hardware-assisted watchpoints |
| 6125 | |
| 6126 | It is now possible to watch array elements, struct members, and |
| 6127 | bitfields with hardware-assisted watchpoints. Data-read watchpoints |
| 6128 | on x86 targets no longer erroneously trigger when the address is |
| 6129 | written. |
| 6130 | |
| 6131 | * Improvements in the native DJGPP version of GDB |
| 6132 | |
| 6133 | The distribution now includes all the scripts and auxiliary files |
| 6134 | necessary to build the native DJGPP version on MS-DOS/MS-Windows |
| 6135 | machines ``out of the box''. |
| 6136 | |
| 6137 | The DJGPP version can now debug programs that use signals. It is |
| 6138 | possible to catch signals that happened in the debuggee, deliver |
| 6139 | signals to it, interrupt it with Ctrl-C, etc. (Previously, a signal |
| 6140 | would kill the program being debugged.) Programs that hook hardware |
| 6141 | interrupts (keyboard, timer, etc.) can also be debugged. |
| 6142 | |
| 6143 | It is now possible to debug DJGPP programs that redirect their |
| 6144 | standard handles or switch them to raw (as opposed to cooked) mode, or |
| 6145 | even close them. The command ``run < foo > bar'' works as expected, |
| 6146 | and ``info terminal'' reports useful information about the debuggee's |
| 6147 | terminal, including raw/cooked mode, redirection, etc. |
| 6148 | |
| 6149 | The DJGPP version now uses termios functions for console I/O, which |
| 6150 | enables debugging graphics programs. Interrupting GDB with Ctrl-C |
| 6151 | also works. |
| 6152 | |
| 6153 | DOS-style file names with drive letters are now fully supported by |
| 6154 | GDB. |
| 6155 | |
| 6156 | It is now possible to debug DJGPP programs that switch their working |
| 6157 | directory. It is also possible to rerun the debuggee any number of |
| 6158 | times without restarting GDB; thus, you can use the same setup, |
| 6159 | breakpoints, etc. for many debugging sessions. |
| 6160 | |
| 6161 | * New native configurations |
| 6162 | |
| 6163 | ARM GNU/Linux arm*-*-linux* |
| 6164 | PowerPC GNU/Linux powerpc-*-linux* |
| 6165 | |
| 6166 | * New targets |
| 6167 | |
| 6168 | Motorola MCore mcore-*-* |
| 6169 | x86 VxWorks i[3456]86-*-vxworks* |
| 6170 | PowerPC VxWorks powerpc-*-vxworks* |
| 6171 | TI TMS320C80 tic80-*-* |
| 6172 | |
| 6173 | * OBSOLETE configurations |
| 6174 | |
| 6175 | Altos 3068 m68*-altos-* |
| 6176 | Convex c1-*-*, c2-*-* |
| 6177 | Pyramid pyramid-*-* |
| 6178 | ARM RISCix arm-*-* (as host) |
| 6179 | Tahoe tahoe-*-* |
| 6180 | |
| 6181 | Configurations that have been declared obsolete will be commented out, |
| 6182 | but the code will be left in place. If there is no activity to revive |
| 6183 | these configurations before the next release of GDB, the sources will |
| 6184 | be permanently REMOVED. |
| 6185 | |
| 6186 | * Gould support removed |
| 6187 | |
| 6188 | Support for the Gould PowerNode and NP1 has been removed. |
| 6189 | |
| 6190 | * New features for SVR4 |
| 6191 | |
| 6192 | On SVR4 native platforms (such as Solaris), if you attach to a process |
| 6193 | without first loading a symbol file, GDB will now attempt to locate and |
| 6194 | load symbols from the running process's executable file. |
| 6195 | |
| 6196 | * Many C++ enhancements |
| 6197 | |
| 6198 | C++ support has been greatly improved. Overload resolution now works properly |
| 6199 | in almost all cases. RTTI support is on the way. |
| 6200 | |
| 6201 | * Remote targets can connect to a sub-program |
| 6202 | |
| 6203 | A popen(3) style serial-device has been added. This device starts a |
| 6204 | sub-process (such as a stand-alone simulator) and then communicates |
| 6205 | with that. The sub-program to run is specified using the syntax |
| 6206 | ``|<program> <args>'' vis: |
| 6207 | |
| 6208 | (gdb) set remotedebug 1 |
| 6209 | (gdb) target extended-remote |mn10300-elf-sim program-args |
| 6210 | |
| 6211 | * MIPS 64 remote protocol |
| 6212 | |
| 6213 | A long standing bug in the mips64 remote protocol where by GDB |
| 6214 | expected certain 32 bit registers (ex SR) to be transfered as 32 |
| 6215 | instead of 64 bits has been fixed. |
| 6216 | |
| 6217 | The command ``set remote-mips64-transfers-32bit-regs on'' has been |
| 6218 | added to provide backward compatibility with older versions of GDB. |
| 6219 | |
| 6220 | * ``set remotebinarydownload'' replaced by ``set remote X-packet'' |
| 6221 | |
| 6222 | The command ``set remotebinarydownload'' command has been replaced by |
| 6223 | ``set remote X-packet''. Other commands in ``set remote'' family |
| 6224 | include ``set remote P-packet''. |
| 6225 | |
| 6226 | * Breakpoint commands accept ranges. |
| 6227 | |
| 6228 | The breakpoint commands ``enable'', ``disable'', and ``delete'' now |
| 6229 | accept a range of breakpoints, e.g. ``5-7''. The tracepoint command |
| 6230 | ``tracepoint passcount'' also accepts a range of tracepoints. |
| 6231 | |
| 6232 | * ``apropos'' command added. |
| 6233 | |
| 6234 | The ``apropos'' command searches through command names and |
| 6235 | documentation strings, printing out matches, making it much easier to |
| 6236 | try to find a command that does what you are looking for. |
| 6237 | |
| 6238 | * New MI interface |
| 6239 | |
| 6240 | A new machine oriented interface (MI) has been added to GDB. This |
| 6241 | interface is designed for debug environments running GDB as a separate |
| 6242 | process. This is part of the long term libGDB project. See the |
| 6243 | "GDB/MI" chapter of the GDB manual for further information. It can be |
| 6244 | enabled by configuring with: |
| 6245 | |
| 6246 | .../configure --enable-gdbmi |
| 6247 | |
| 6248 | *** Changes in GDB-4.18: |
| 6249 | |
| 6250 | * New native configurations |
| 6251 | |
| 6252 | HP-UX 10.20 hppa*-*-hpux10.20 |
| 6253 | HP-UX 11.x hppa*-*-hpux11.0* |
| 6254 | M68K GNU/Linux m68*-*-linux* |
| 6255 | |
| 6256 | * New targets |
| 6257 | |
| 6258 | Fujitsu FR30 fr30-*-elf* |
| 6259 | Intel StrongARM strongarm-*-* |
| 6260 | Mitsubishi D30V d30v-*-* |
| 6261 | |
| 6262 | * OBSOLETE configurations |
| 6263 | |
| 6264 | Gould PowerNode, NP1 np1-*-*, pn-*-* |
| 6265 | |
| 6266 | Configurations that have been declared obsolete will be commented out, |
| 6267 | but the code will be left in place. If there is no activity to revive |
| 6268 | these configurations before the next release of GDB, the sources will |
| 6269 | be permanently REMOVED. |
| 6270 | |
| 6271 | * ANSI/ISO C |
| 6272 | |
| 6273 | As a compatibility experiment, GDB's source files buildsym.h and |
| 6274 | buildsym.c have been converted to pure standard C, no longer |
| 6275 | containing any K&R compatibility code. We believe that all systems in |
| 6276 | use today either come with a standard C compiler, or have a GCC port |
| 6277 | available. If this is not true, please report the affected |
| 6278 | configuration to bug-gdb@gnu.org immediately. See the README file for |
| 6279 | information about getting a standard C compiler if you don't have one |
| 6280 | already. |
| 6281 | |
| 6282 | * Readline 2.2 |
| 6283 | |
| 6284 | GDB now uses readline 2.2. |
| 6285 | |
| 6286 | * set extension-language |
| 6287 | |
| 6288 | You can now control the mapping between filename extensions and source |
| 6289 | languages by using the `set extension-language' command. For instance, |
| 6290 | you can ask GDB to treat .c files as C++ by saying |
| 6291 | set extension-language .c c++ |
| 6292 | The command `info extensions' lists all of the recognized extensions |
| 6293 | and their associated languages. |
| 6294 | |
| 6295 | * Setting processor type for PowerPC and RS/6000 |
| 6296 | |
| 6297 | When GDB is configured for a powerpc*-*-* or an rs6000*-*-* target, |
| 6298 | you can use the `set processor' command to specify what variant of the |
| 6299 | PowerPC family you are debugging. The command |
| 6300 | |
| 6301 | set processor NAME |
| 6302 | |
| 6303 | sets the PowerPC/RS6000 variant to NAME. GDB knows about the |
| 6304 | following PowerPC and RS6000 variants: |
| 6305 | |
| 6306 | ppc-uisa PowerPC UISA - a PPC processor as viewed by user-level code |
| 6307 | rs6000 IBM RS6000 ("POWER") architecture, user-level view |
| 6308 | 403 IBM PowerPC 403 |
| 6309 | 403GC IBM PowerPC 403GC |
| 6310 | 505 Motorola PowerPC 505 |
| 6311 | 860 Motorola PowerPC 860 or 850 |
| 6312 | 601 Motorola PowerPC 601 |
| 6313 | 602 Motorola PowerPC 602 |
| 6314 | 603 Motorola/IBM PowerPC 603 or 603e |
| 6315 | 604 Motorola PowerPC 604 or 604e |
| 6316 | 750 Motorola/IBM PowerPC 750 or 750 |
| 6317 | |
| 6318 | At the moment, this command just tells GDB what to name the |
| 6319 | special-purpose processor registers. Since almost all the affected |
| 6320 | registers are inaccessible to user-level programs, this command is |
| 6321 | only useful for remote debugging in its present form. |
| 6322 | |
| 6323 | * HP-UX support |
| 6324 | |
| 6325 | Thanks to a major code donation from Hewlett-Packard, GDB now has much |
| 6326 | more extensive support for HP-UX. Added features include shared |
| 6327 | library support, kernel threads and hardware watchpoints for 11.00, |
| 6328 | support for HP's ANSI C and C++ compilers, and a compatibility mode |
| 6329 | for xdb and dbx commands. |
| 6330 | |
| 6331 | * Catchpoints |
| 6332 | |
| 6333 | HP's donation includes the new concept of catchpoints, which is a |
| 6334 | generalization of the old catch command. On HP-UX, it is now possible |
| 6335 | to catch exec, fork, and vfork, as well as library loading. |
| 6336 | |
| 6337 | This means that the existing catch command has changed; its first |
| 6338 | argument now specifies the type of catch to be set up. See the |
| 6339 | output of "help catch" for a list of catchpoint types. |
| 6340 | |
| 6341 | * Debugging across forks |
| 6342 | |
| 6343 | On HP-UX, you can choose which process to debug when a fork() happens |
| 6344 | in the inferior. |
| 6345 | |
| 6346 | * TUI |
| 6347 | |
| 6348 | HP has donated a curses-based terminal user interface (TUI). To get |
| 6349 | it, build with --enable-tui. Although this can be enabled for any |
| 6350 | configuration, at present it only works for native HP debugging. |
| 6351 | |
| 6352 | * GDB remote protocol additions |
| 6353 | |
| 6354 | A new protocol packet 'X' that writes binary data is now available. |
| 6355 | Default behavior is to try 'X', then drop back to 'M' if the stub |
| 6356 | fails to respond. The settable variable `remotebinarydownload' |
| 6357 | allows explicit control over the use of 'X'. |
| 6358 | |
| 6359 | For 64-bit targets, the memory packets ('M' and 'm') can now contain a |
| 6360 | full 64-bit address. The command |
| 6361 | |
| 6362 | set remoteaddresssize 32 |
| 6363 | |
| 6364 | can be used to revert to the old behaviour. For existing remote stubs |
| 6365 | the change should not be noticed, as the additional address information |
| 6366 | will be discarded. |
| 6367 | |
| 6368 | In order to assist in debugging stubs, you may use the maintenance |
| 6369 | command `packet' to send any text string to the stub. For instance, |
| 6370 | |
| 6371 | maint packet heythere |
| 6372 | |
| 6373 | sends the packet "$heythere#<checksum>". Note that it is very easy to |
| 6374 | disrupt a debugging session by sending the wrong packet at the wrong |
| 6375 | time. |
| 6376 | |
| 6377 | The compare-sections command allows you to compare section data on the |
| 6378 | target to what is in the executable file without uploading or |
| 6379 | downloading, by comparing CRC checksums. |
| 6380 | |
| 6381 | * Tracing can collect general expressions |
| 6382 | |
| 6383 | You may now collect general expressions at tracepoints. This requires |
| 6384 | further additions to the target-side stub; see tracepoint.c and |
| 6385 | doc/agentexpr.texi for further details. |
| 6386 | |
| 6387 | * mask-address variable for Mips |
| 6388 | |
| 6389 | For Mips targets, you may control the zeroing of the upper 32 bits of |
| 6390 | a 64-bit address by entering `set mask-address on'. This is mainly |
| 6391 | of interest to users of embedded R4xxx and R5xxx processors. |
| 6392 | |
| 6393 | * Higher serial baud rates |
| 6394 | |
| 6395 | GDB's serial code now allows you to specify baud rates 57600, 115200, |
| 6396 | 230400, and 460800 baud. (Note that your host system may not be able |
| 6397 | to achieve all of these rates.) |
| 6398 | |
| 6399 | * i960 simulator |
| 6400 | |
| 6401 | The i960 configuration now includes an initial implementation of a |
| 6402 | builtin simulator, contributed by Jim Wilson. |
| 6403 | |
| 6404 | |
| 6405 | *** Changes in GDB-4.17: |
| 6406 | |
| 6407 | * New native configurations |
| 6408 | |
| 6409 | Alpha GNU/Linux alpha*-*-linux* |
| 6410 | Unixware 2.x i[3456]86-unixware2* |
| 6411 | Irix 6.x mips*-sgi-irix6* |
| 6412 | PowerPC GNU/Linux powerpc-*-linux* |
| 6413 | PowerPC Solaris powerpcle-*-solaris* |
| 6414 | Sparc GNU/Linux sparc-*-linux* |
| 6415 | Motorola sysV68 R3V7.1 m68k-motorola-sysv |
| 6416 | |
| 6417 | * New targets |
| 6418 | |
| 6419 | Argonaut Risc Chip (ARC) arc-*-* |
| 6420 | Hitachi H8/300S h8300*-*-* |
| 6421 | Matsushita MN10200 w/simulator mn10200-*-* |
| 6422 | Matsushita MN10300 w/simulator mn10300-*-* |
| 6423 | MIPS NEC VR4100 mips64*vr4100*{,el}-*-elf* |
| 6424 | MIPS NEC VR5000 mips64*vr5000*{,el}-*-elf* |
| 6425 | MIPS Toshiba TX39 mips64*tx39*{,el}-*-elf* |
| 6426 | Mitsubishi D10V w/simulator d10v-*-* |
| 6427 | Mitsubishi M32R/D w/simulator m32r-*-elf* |
| 6428 | Tsqware Sparclet sparclet-*-* |
| 6429 | NEC V850 w/simulator v850-*-* |
| 6430 | |
| 6431 | * New debugging protocols |
| 6432 | |
| 6433 | ARM with RDI protocol arm*-*-* |
| 6434 | M68K with dBUG monitor m68*-*-{aout,coff,elf} |
| 6435 | DDB and LSI variants of PMON protocol mips*-*-* |
| 6436 | PowerPC with DINK32 monitor powerpc{,le}-*-eabi |
| 6437 | PowerPC with SDS protocol powerpc{,le}-*-eabi |
| 6438 | Macraigor OCD (Wiggler) devices powerpc{,le}-*-eabi |
| 6439 | |
| 6440 | * DWARF 2 |
| 6441 | |
| 6442 | All configurations can now understand and use the DWARF 2 debugging |
| 6443 | format. The choice is automatic, if the symbol file contains DWARF 2 |
| 6444 | information. |
| 6445 | |
| 6446 | * Java frontend |
| 6447 | |
| 6448 | GDB now includes basic Java language support. This support is |
| 6449 | only useful with Java compilers that produce native machine code. |
| 6450 | |
| 6451 | * solib-absolute-prefix and solib-search-path |
| 6452 | |
| 6453 | For SunOS and SVR4 shared libraries, you may now set the prefix for |
| 6454 | loading absolute shared library symbol files, and the search path for |
| 6455 | locating non-absolute shared library symbol files. |
| 6456 | |
| 6457 | * Live range splitting |
| 6458 | |
| 6459 | GDB can now effectively debug code for which GCC has performed live |
| 6460 | range splitting as part of its optimization. See gdb/doc/LRS for |
| 6461 | more details on the expected format of the stabs information. |
| 6462 | |
| 6463 | * Hurd support |
| 6464 | |
| 6465 | GDB's support for the GNU Hurd, including thread debugging, has been |
| 6466 | updated to work with current versions of the Hurd. |
| 6467 | |
| 6468 | * ARM Thumb support |
| 6469 | |
| 6470 | GDB's ARM target configuration now handles the ARM7T (Thumb) 16-bit |
| 6471 | instruction set. ARM GDB automatically detects when Thumb |
| 6472 | instructions are in use, and adjusts disassembly and backtracing |
| 6473 | accordingly. |
| 6474 | |
| 6475 | * MIPS16 support |
| 6476 | |
| 6477 | GDB's MIPS target configurations now handle the MIP16 16-bit |
| 6478 | instruction set. |
| 6479 | |
| 6480 | * Overlay support |
| 6481 | |
| 6482 | GDB now includes support for overlays; if an executable has been |
| 6483 | linked such that multiple sections are based at the same address, GDB |
| 6484 | will decide which section to use for symbolic info. You can choose to |
| 6485 | control the decision manually, using overlay commands, or implement |
| 6486 | additional target-side support and use "overlay load-target" to bring |
| 6487 | in the overlay mapping. Do "help overlay" for more detail. |
| 6488 | |
| 6489 | * info symbol |
| 6490 | |
| 6491 | The command "info symbol <address>" displays information about |
| 6492 | the symbol at the specified address. |
| 6493 | |
| 6494 | * Trace support |
| 6495 | |
| 6496 | The standard remote protocol now includes an extension that allows |
| 6497 | asynchronous collection and display of trace data. This requires |
| 6498 | extensive support in the target-side debugging stub. Tracing mode |
| 6499 | includes a new interaction mode in GDB and new commands: see the |
| 6500 | file tracepoint.c for more details. |
| 6501 | |
| 6502 | * MIPS simulator |
| 6503 | |
| 6504 | Configurations for embedded MIPS now include a simulator contributed |
| 6505 | by Cygnus Solutions. The simulator supports the instruction sets |
| 6506 | of most MIPS variants. |
| 6507 | |
| 6508 | * Sparc simulator |
| 6509 | |
| 6510 | Sparc configurations may now include the ERC32 simulator contributed |
| 6511 | by the European Space Agency. The simulator is not built into |
| 6512 | Sparc targets by default; configure with --enable-sim to include it. |
| 6513 | |
| 6514 | * set architecture |
| 6515 | |
| 6516 | For target configurations that may include multiple variants of a |
| 6517 | basic architecture (such as MIPS and SH), you may now set the |
| 6518 | architecture explicitly. "set arch" sets, "info arch" lists |
| 6519 | the possible architectures. |
| 6520 | |
| 6521 | *** Changes in GDB-4.16: |
| 6522 | |
| 6523 | * New native configurations |
| 6524 | |
| 6525 | Windows 95, x86 Windows NT i[345]86-*-cygwin32 |
| 6526 | M68K NetBSD m68k-*-netbsd* |
| 6527 | PowerPC AIX 4.x powerpc-*-aix* |
| 6528 | PowerPC MacOS powerpc-*-macos* |
| 6529 | PowerPC Windows NT powerpcle-*-cygwin32 |
| 6530 | RS/6000 AIX 4.x rs6000-*-aix4* |
| 6531 | |
| 6532 | * New targets |
| 6533 | |
| 6534 | ARM with RDP protocol arm-*-* |
| 6535 | I960 with MON960 i960-*-coff |
| 6536 | MIPS VxWorks mips*-*-vxworks* |
| 6537 | MIPS VR4300 with PMON mips64*vr4300{,el}-*-elf* |
| 6538 | PowerPC with PPCBUG monitor powerpc{,le}-*-eabi* |
| 6539 | Hitachi SH3 sh-*-* |
| 6540 | Matra Sparclet sparclet-*-* |
| 6541 | |
| 6542 | * PowerPC simulator |
| 6543 | |
| 6544 | The powerpc-eabi configuration now includes the PSIM simulator, |
| 6545 | contributed by Andrew Cagney, with assistance from Mike Meissner. |
| 6546 | PSIM is a very elaborate model of the PowerPC, including not only |
| 6547 | basic instruction set execution, but also details of execution unit |
| 6548 | performance and I/O hardware. See sim/ppc/README for more details. |
| 6549 | |
| 6550 | * Solaris 2.5 |
| 6551 | |
| 6552 | GDB now works with Solaris 2.5. |
| 6553 | |
| 6554 | * Windows 95/NT native |
| 6555 | |
| 6556 | GDB will now work as a native debugger on Windows 95 and Windows NT. |
| 6557 | To build it from source, you must use the "gnu-win32" environment, |
| 6558 | which uses a DLL to emulate enough of Unix to run the GNU tools. |
| 6559 | Further information, binaries, and sources are available at |
| 6560 | ftp.cygnus.com, under pub/gnu-win32. |
| 6561 | |
| 6562 | * dont-repeat command |
| 6563 | |
| 6564 | If a user-defined command includes the command `dont-repeat', then the |
| 6565 | command will not be repeated if the user just types return. This is |
| 6566 | useful if the command is time-consuming to run, so that accidental |
| 6567 | extra keystrokes don't run the same command many times. |
| 6568 | |
| 6569 | * Send break instead of ^C |
| 6570 | |
| 6571 | The standard remote protocol now includes an option to send a break |
| 6572 | rather than a ^C to the target in order to interrupt it. By default, |
| 6573 | GDB will send ^C; to send a break, set the variable `remotebreak' to 1. |
| 6574 | |
| 6575 | * Remote protocol timeout |
| 6576 | |
| 6577 | The standard remote protocol includes a new variable `remotetimeout' |
| 6578 | that allows you to set the number of seconds before GDB gives up trying |
| 6579 | to read from the target. The default value is 2. |
| 6580 | |
| 6581 | * Automatic tracking of dynamic object loading (HPUX and Solaris only) |
| 6582 | |
| 6583 | By default GDB will automatically keep track of objects as they are |
| 6584 | loaded and unloaded by the dynamic linker. By using the command `set |
| 6585 | stop-on-solib-events 1' you can arrange for GDB to stop the inferior |
| 6586 | when shared library events occur, thus allowing you to set breakpoints |
| 6587 | in shared libraries which are explicitly loaded by the inferior. |
| 6588 | |
| 6589 | Note this feature does not work on hpux8. On hpux9 you must link |
| 6590 | /usr/lib/end.o into your program. This feature should work |
| 6591 | automatically on hpux10. |
| 6592 | |
| 6593 | * Irix 5.x hardware watchpoint support |
| 6594 | |
| 6595 | Irix 5 configurations now support the use of hardware watchpoints. |
| 6596 | |
| 6597 | * Mips protocol "SYN garbage limit" |
| 6598 | |
| 6599 | When debugging a Mips target using the `target mips' protocol, you |
| 6600 | may set the number of characters that GDB will ignore by setting |
| 6601 | the `syn-garbage-limit'. A value of -1 means that GDB will ignore |
| 6602 | every character. The default value is 1050. |
| 6603 | |
| 6604 | * Recording and replaying remote debug sessions |
| 6605 | |
| 6606 | If you set `remotelogfile' to the name of a file, gdb will write to it |
| 6607 | a recording of a remote debug session. This recording may then be |
| 6608 | replayed back to gdb using "gdbreplay". See gdbserver/README for |
| 6609 | details. This is useful when you have a problem with GDB while doing |
| 6610 | remote debugging; you can make a recording of the session and send it |
| 6611 | to someone else, who can then recreate the problem. |
| 6612 | |
| 6613 | * Speedups for remote debugging |
| 6614 | |
| 6615 | GDB includes speedups for downloading and stepping MIPS systems using |
| 6616 | the IDT monitor, fast downloads to the Hitachi SH E7000 emulator, |
| 6617 | and more efficient S-record downloading. |
| 6618 | |
| 6619 | * Memory use reductions and statistics collection |
| 6620 | |
| 6621 | GDB now uses less memory and reports statistics about memory usage. |
| 6622 | Try the `maint print statistics' command, for example. |
| 6623 | |
| 6624 | *** Changes in GDB-4.15: |
| 6625 | |
| 6626 | * Psymtabs for XCOFF |
| 6627 | |
| 6628 | The symbol reader for AIX GDB now uses partial symbol tables. This |
| 6629 | can greatly improve startup time, especially for large executables. |
| 6630 | |
| 6631 | * Remote targets use caching |
| 6632 | |
| 6633 | Remote targets now use a data cache to speed up communication with the |
| 6634 | remote side. The data cache could lead to incorrect results because |
| 6635 | it doesn't know about volatile variables, thus making it impossible to |
| 6636 | debug targets which use memory mapped I/O devices. `set remotecache |
| 6637 | off' turns the data cache off. |
| 6638 | |
| 6639 | * Remote targets may have threads |
| 6640 | |
| 6641 | The standard remote protocol now includes support for multiple threads |
| 6642 | in the target system, using new protocol commands 'H' and 'T'. See |
| 6643 | gdb/remote.c for details. |
| 6644 | |
| 6645 | * NetROM support |
| 6646 | |
| 6647 | If GDB is configured with `--enable-netrom', then it will include |
| 6648 | support for the NetROM ROM emulator from XLNT Designs. The NetROM |
| 6649 | acts as though it is a bank of ROM on the target board, but you can |
| 6650 | write into it over the network. GDB's support consists only of |
| 6651 | support for fast loading into the emulated ROM; to debug, you must use |
| 6652 | another protocol, such as standard remote protocol. The usual |
| 6653 | sequence is something like |
| 6654 | |
| 6655 | target nrom <netrom-hostname> |
| 6656 | load <prog> |
| 6657 | target remote <netrom-hostname>:1235 |
| 6658 | |
| 6659 | * Macintosh host |
| 6660 | |
| 6661 | GDB now includes support for the Apple Macintosh, as a host only. It |
| 6662 | may be run as either an MPW tool or as a standalone application, and |
| 6663 | it can debug through the serial port. All the usual GDB commands are |
| 6664 | available, but to the target command, you must supply "serial" as the |
| 6665 | device type instead of "/dev/ttyXX". See mpw-README in the main |
| 6666 | directory for more information on how to build. The MPW configuration |
| 6667 | scripts */mpw-config.in support only a few targets, and only the |
| 6668 | mips-idt-ecoff target has been tested. |
| 6669 | |
| 6670 | * Autoconf |
| 6671 | |
| 6672 | GDB configuration now uses autoconf. This is not user-visible, |
| 6673 | but does simplify configuration and building. |
| 6674 | |
| 6675 | * hpux10 |
| 6676 | |
| 6677 | GDB now supports hpux10. |
| 6678 | |
| 6679 | *** Changes in GDB-4.14: |
| 6680 | |
| 6681 | * New native configurations |
| 6682 | |
| 6683 | x86 FreeBSD i[345]86-*-freebsd |
| 6684 | x86 NetBSD i[345]86-*-netbsd |
| 6685 | NS32k NetBSD ns32k-*-netbsd |
| 6686 | Sparc NetBSD sparc-*-netbsd |
| 6687 | |
| 6688 | * New targets |
| 6689 | |
| 6690 | A29K VxWorks a29k-*-vxworks |
| 6691 | HP PA PRO embedded (WinBond W89K & Oki OP50N) hppa*-*-pro* |
| 6692 | CPU32 EST-300 emulator m68*-*-est* |
| 6693 | PowerPC ELF powerpc-*-elf |
| 6694 | WDC 65816 w65-*-* |
| 6695 | |
| 6696 | * Alpha OSF/1 support for procfs |
| 6697 | |
| 6698 | GDB now supports procfs under OSF/1-2.x and higher, which makes it |
| 6699 | possible to attach to running processes. As the mounting of the /proc |
| 6700 | filesystem is optional on the Alpha, GDB automatically determines |
| 6701 | the availability of /proc during startup. This can lead to problems |
| 6702 | if /proc is unmounted after GDB has been started. |
| 6703 | |
| 6704 | * Arguments to user-defined commands |
| 6705 | |
| 6706 | User commands may accept up to 10 arguments separated by whitespace. |
| 6707 | Arguments are accessed within the user command via $arg0..$arg9. A |
| 6708 | trivial example: |
| 6709 | define adder |
| 6710 | print $arg0 + $arg1 + $arg2 |
| 6711 | |
| 6712 | To execute the command use: |
| 6713 | adder 1 2 3 |
| 6714 | |
| 6715 | Defines the command "adder" which prints the sum of its three arguments. |
| 6716 | Note the arguments are text substitutions, so they may reference variables, |
| 6717 | use complex expressions, or even perform inferior function calls. |
| 6718 | |
| 6719 | * New `if' and `while' commands |
| 6720 | |
| 6721 | This makes it possible to write more sophisticated user-defined |
| 6722 | commands. Both commands take a single argument, which is the |
| 6723 | expression to evaluate, and must be followed by the commands to |
| 6724 | execute, one per line, if the expression is nonzero, the list being |
| 6725 | terminated by the word `end'. The `if' command list may include an |
| 6726 | `else' word, which causes the following commands to be executed only |
| 6727 | if the expression is zero. |
| 6728 | |
| 6729 | * Fortran source language mode |
| 6730 | |
| 6731 | GDB now includes partial support for Fortran 77. It will recognize |
| 6732 | Fortran programs and can evaluate a subset of Fortran expressions, but |
| 6733 | variables and functions may not be handled correctly. GDB will work |
| 6734 | with G77, but does not yet know much about symbols emitted by other |
| 6735 | Fortran compilers. |
| 6736 | |
| 6737 | * Better HPUX support |
| 6738 | |
| 6739 | Most debugging facilities now work on dynamic executables for HPPAs |
| 6740 | running hpux9 or later. You can attach to running dynamically linked |
| 6741 | processes, but by default the dynamic libraries will be read-only, so |
| 6742 | for instance you won't be able to put breakpoints in them. To change |
| 6743 | that behavior do the following before running the program: |
| 6744 | |
| 6745 | adb -w a.out |
| 6746 | __dld_flags?W 0x5 |
| 6747 | control-d |
| 6748 | |
| 6749 | This will cause the libraries to be mapped private and read-write. |
| 6750 | To revert to the normal behavior, do this: |
| 6751 | |
| 6752 | adb -w a.out |
| 6753 | __dld_flags?W 0x4 |
| 6754 | control-d |
| 6755 | |
| 6756 | You cannot set breakpoints or examine data in the library until after |
| 6757 | the library is loaded if the function/data symbols do not have |
| 6758 | external linkage. |
| 6759 | |
| 6760 | GDB can now also read debug symbols produced by the HP C compiler on |
| 6761 | HPPAs (sorry, no C++, Fortran or 68k support). |
| 6762 | |
| 6763 | * Target byte order now dynamically selectable |
| 6764 | |
| 6765 | You can choose which byte order to use with a target system, via the |
| 6766 | commands "set endian big" and "set endian little", and you can see the |
| 6767 | current setting by using "show endian". You can also give the command |
| 6768 | "set endian auto", in which case GDB will use the byte order |
| 6769 | associated with the executable. Currently, only embedded MIPS |
| 6770 | configurations support dynamic selection of target byte order. |
| 6771 | |
| 6772 | * New DOS host serial code |
| 6773 | |
| 6774 | This version uses DPMI interrupts to handle buffered I/O, so you |
| 6775 | no longer need to run asynctsr when debugging boards connected to |
| 6776 | a PC's serial port. |
| 6777 | |
| 6778 | *** Changes in GDB-4.13: |
| 6779 | |
| 6780 | * New "complete" command |
| 6781 | |
| 6782 | This lists all the possible completions for the rest of the line, if it |
| 6783 | were to be given as a command itself. This is intended for use by emacs. |
| 6784 | |
| 6785 | * Trailing space optional in prompt |
| 6786 | |
| 6787 | "set prompt" no longer adds a space for you after the prompt you set. This |
| 6788 | allows you to set a prompt which ends in a space or one that does not. |
| 6789 | |
| 6790 | * Breakpoint hit counts |
| 6791 | |
| 6792 | "info break" now displays a count of the number of times the breakpoint |
| 6793 | has been hit. This is especially useful in conjunction with "ignore"; you |
| 6794 | can ignore a large number of breakpoint hits, look at the breakpoint info |
| 6795 | to see how many times the breakpoint was hit, then run again, ignoring one |
| 6796 | less than that number, and this will get you quickly to the last hit of |
| 6797 | that breakpoint. |
| 6798 | |
| 6799 | * Ability to stop printing at NULL character |
| 6800 | |
| 6801 | "set print null-stop" will cause GDB to stop printing the characters of |
| 6802 | an array when the first NULL is encountered. This is useful when large |
| 6803 | arrays actually contain only short strings. |
| 6804 | |
| 6805 | * Shared library breakpoints |
| 6806 | |
| 6807 | In SunOS 4.x, SVR4, and Alpha OSF/1 configurations, you can now set |
| 6808 | breakpoints in shared libraries before the executable is run. |
| 6809 | |
| 6810 | * Hardware watchpoints |
| 6811 | |
| 6812 | There is a new hardware breakpoint for the watch command for sparclite |
| 6813 | targets. See gdb/sparclite/hw_breakpoint.note. |
| 6814 | |
| 6815 | Hardware watchpoints are also now supported under GNU/Linux. |
| 6816 | |
| 6817 | * Annotations |
| 6818 | |
| 6819 | Annotations have been added. These are for use with graphical interfaces, |
| 6820 | and are still experimental. Currently only gdba.el uses these. |
| 6821 | |
| 6822 | * Improved Irix 5 support |
| 6823 | |
| 6824 | GDB now works properly with Irix 5.2. |
| 6825 | |
| 6826 | * Improved HPPA support |
| 6827 | |
| 6828 | GDB now works properly with the latest GCC and GAS. |
| 6829 | |
| 6830 | * New native configurations |
| 6831 | |
| 6832 | Sequent PTX4 i[34]86-sequent-ptx4 |
| 6833 | HPPA running OSF/1 hppa*-*-osf* |
| 6834 | Atari TT running SVR4 m68*-*-sysv4* |
| 6835 | RS/6000 LynxOS rs6000-*-lynxos* |
| 6836 | |
| 6837 | * New targets |
| 6838 | |
| 6839 | OS/9000 i[34]86-*-os9k |
| 6840 | MIPS R4000 mips64*{,el}-*-{ecoff,elf} |
| 6841 | Sparc64 sparc64-*-* |
| 6842 | |
| 6843 | * Hitachi SH7000 and E7000-PC ICE support |
| 6844 | |
| 6845 | There is now support for communicating with the Hitachi E7000-PC ICE. |
| 6846 | This is available automatically when GDB is configured for the SH. |
| 6847 | |
| 6848 | * Fixes |
| 6849 | |
| 6850 | As usual, a variety of small fixes and improvements, both generic |
| 6851 | and configuration-specific. See the ChangeLog for more detail. |
| 6852 | |
| 6853 | *** Changes in GDB-4.12: |
| 6854 | |
| 6855 | * Irix 5 is now supported |
| 6856 | |
| 6857 | * HPPA support |
| 6858 | |
| 6859 | GDB-4.12 on the HPPA has a number of changes which make it unable |
| 6860 | to debug the output from the currently released versions of GCC and |
| 6861 | GAS (GCC 2.5.8 and GAS-2.2 or PAGAS-1.36). Until the next major release |
| 6862 | of GCC and GAS, versions of these tools designed to work with GDB-4.12 |
| 6863 | can be retrieved via anonymous ftp from jaguar.cs.utah.edu:/dist. |
| 6864 | |
| 6865 | |
| 6866 | *** Changes in GDB-4.11: |
| 6867 | |
| 6868 | * User visible changes: |
| 6869 | |
| 6870 | * Remote Debugging |
| 6871 | |
| 6872 | The "set remotedebug" option is now consistent between the mips remote |
| 6873 | target, remote targets using the gdb-specific protocol, UDI (AMD's |
| 6874 | debug protocol for the 29k) and the 88k bug monitor. It is now an |
| 6875 | integer specifying a debug level (normally 0 or 1, but 2 means more |
| 6876 | debugging info for the mips target). |
| 6877 | |
| 6878 | * DEC Alpha native support |
| 6879 | |
| 6880 | GDB now works on the DEC Alpha. GCC 2.4.5 does not produce usable |
| 6881 | debug info, but GDB works fairly well with the DEC compiler and should |
| 6882 | work with a future GCC release. See the README file for a few |
| 6883 | Alpha-specific notes. |
| 6884 | |
| 6885 | * Preliminary thread implementation |
| 6886 | |
| 6887 | GDB now has preliminary thread support for both SGI/Irix and LynxOS. |
| 6888 | |
| 6889 | * LynxOS native and target support for 386 |
| 6890 | |
| 6891 | This release has been hosted on LynxOS 2.2, and also can be configured |
| 6892 | to remotely debug programs running under LynxOS (see gdb/gdbserver/README |
| 6893 | for details). |
| 6894 | |
| 6895 | * Improvements in C++ mangling/demangling. |
| 6896 | |
| 6897 | This release has much better g++ debugging, specifically in name |
| 6898 | mangling/demangling, virtual function calls, print virtual table, |
| 6899 | call methods, ...etc. |
| 6900 | |
| 6901 | *** Changes in GDB-4.10: |
| 6902 | |
| 6903 | * User visible changes: |
| 6904 | |
| 6905 | Remote debugging using the GDB-specific (`target remote') protocol now |
| 6906 | supports the `load' command. This is only useful if you have some |
| 6907 | other way of getting the stub to the target system, and you can put it |
| 6908 | somewhere in memory where it won't get clobbered by the download. |
| 6909 | |
| 6910 | Filename completion now works. |
| 6911 | |
| 6912 | When run under emacs mode, the "info line" command now causes the |
| 6913 | arrow to point to the line specified. Also, "info line" prints |
| 6914 | addresses in symbolic form (as well as hex). |
| 6915 | |
| 6916 | All vxworks based targets now support a user settable option, called |
| 6917 | vxworks-timeout. This option represents the number of seconds gdb |
| 6918 | should wait for responses to rpc's. You might want to use this if |
| 6919 | your vxworks target is, perhaps, a slow software simulator or happens |
| 6920 | to be on the far side of a thin network line. |
| 6921 | |
| 6922 | * DEC alpha support |
| 6923 | |
| 6924 | This release contains support for using a DEC alpha as a GDB host for |
| 6925 | cross debugging. Native alpha debugging is not supported yet. |
| 6926 | |
| 6927 | |
| 6928 | *** Changes in GDB-4.9: |
| 6929 | |
| 6930 | * Testsuite |
| 6931 | |
| 6932 | This is the first GDB release which is accompanied by a matching testsuite. |
| 6933 | The testsuite requires installation of dejagnu, which should be available |
| 6934 | via ftp from most sites that carry GNU software. |
| 6935 | |
| 6936 | * C++ demangling |
| 6937 | |
| 6938 | 'Cfront' style demangling has had its name changed to 'ARM' style, to |
| 6939 | emphasize that it was written from the specifications in the C++ Annotated |
| 6940 | Reference Manual, not necessarily to be compatible with AT&T cfront. Despite |
| 6941 | disclaimers, it still generated too much confusion with users attempting to |
| 6942 | use gdb with AT&T cfront. |
| 6943 | |
| 6944 | * Simulators |
| 6945 | |
| 6946 | GDB now uses a standard remote interface to a simulator library. |
| 6947 | So far, the library contains simulators for the Zilog Z8001/2, the |
| 6948 | Hitachi H8/300, H8/500 and Super-H. |
| 6949 | |
| 6950 | * New targets supported |
| 6951 | |
| 6952 | H8/300 simulator h8300-hitachi-hms or h8300hms |
| 6953 | H8/500 simulator h8500-hitachi-hms or h8500hms |
| 6954 | SH simulator sh-hitachi-hms or sh |
| 6955 | Z8000 simulator z8k-zilog-none or z8ksim |
| 6956 | IDT MIPS board over serial line mips-idt-ecoff |
| 6957 | |
| 6958 | Cross-debugging to GO32 targets is supported. It requires a custom |
| 6959 | version of the i386-stub.c module which is integrated with the |
| 6960 | GO32 memory extender. |
| 6961 | |
| 6962 | * New remote protocols |
| 6963 | |
| 6964 | MIPS remote debugging protocol. |
| 6965 | |
| 6966 | * New source languages supported |
| 6967 | |
| 6968 | This version includes preliminary support for Chill, a Pascal like language |
| 6969 | used by telecommunications companies. Chill support is also being integrated |
| 6970 | into the GNU compiler, but we don't know when it will be publically available. |
| 6971 | |
| 6972 | |
| 6973 | *** Changes in GDB-4.8: |
| 6974 | |
| 6975 | * HP Precision Architecture supported |
| 6976 | |
| 6977 | GDB now supports HP PA-RISC machines running HPUX. A preliminary |
| 6978 | version of this support was available as a set of patches from the |
| 6979 | University of Utah. GDB does not support debugging of programs |
| 6980 | compiled with the HP compiler, because HP will not document their file |
| 6981 | format. Instead, you must use GCC (version 2.3.2 or later) and PA-GAS |
| 6982 | (as available from jaguar.cs.utah.edu:/dist/pa-gas.u4.tar.Z). |
| 6983 | |
| 6984 | Many problems in the preliminary version have been fixed. |
| 6985 | |
| 6986 | * Faster and better demangling |
| 6987 | |
| 6988 | We have improved template demangling and fixed numerous bugs in the GNU style |
| 6989 | demangler. It can now handle type modifiers such as `static' or `const'. Wide |
| 6990 | character types (wchar_t) are now supported. Demangling of each symbol is now |
| 6991 | only done once, and is cached when the symbol table for a file is read in. |
| 6992 | This results in a small increase in memory usage for C programs, a moderate |
| 6993 | increase in memory usage for C++ programs, and a fantastic speedup in |
| 6994 | symbol lookups. |
| 6995 | |
| 6996 | `Cfront' style demangling still doesn't work with AT&T cfront. It was written |
| 6997 | from the specifications in the Annotated Reference Manual, which AT&T's |
| 6998 | compiler does not actually implement. |
| 6999 | |
| 7000 | * G++ multiple inheritance compiler problem |
| 7001 | |
| 7002 | In the 2.3.2 release of gcc/g++, how the compiler resolves multiple |
| 7003 | inheritance lattices was reworked to properly discover ambiguities. We |
| 7004 | recently found an example which causes this new algorithm to fail in a |
| 7005 | very subtle way, producing bad debug information for those classes. |
| 7006 | The file 'gcc.patch' (in this directory) can be applied to gcc to |
| 7007 | circumvent the problem. A future GCC release will contain a complete |
| 7008 | fix. |
| 7009 | |
| 7010 | The previous G++ debug info problem (mentioned below for the gdb-4.7 |
| 7011 | release) is fixed in gcc version 2.3.2. |
| 7012 | |
| 7013 | * Improved configure script |
| 7014 | |
| 7015 | The `configure' script will now attempt to guess your system type if |
| 7016 | you don't supply a host system type. The old scheme of supplying a |
| 7017 | host system triplet is preferable over using this. All the magic is |
| 7018 | done in the new `config.guess' script. Examine it for details. |
| 7019 | |
| 7020 | We have also brought our configure script much more in line with the FSF's |
| 7021 | version. It now supports the --with-xxx options. In particular, |
| 7022 | `--with-minimal-bfd' can be used to make the GDB binary image smaller. |
| 7023 | The resulting GDB will not be able to read arbitrary object file formats -- |
| 7024 | only the format ``expected'' to be used on the configured target system. |
| 7025 | We hope to make this the default in a future release. |
| 7026 | |
| 7027 | * Documentation improvements |
| 7028 | |
| 7029 | There's new internal documentation on how to modify GDB, and how to |
| 7030 | produce clean changes to the code. We implore people to read it |
| 7031 | before submitting changes. |
| 7032 | |
| 7033 | The GDB manual uses new, sexy Texinfo conditionals, rather than arcane |
| 7034 | M4 macros. The new texinfo.tex is provided in this release. Pre-built |
| 7035 | `info' files are also provided. To build `info' files from scratch, |
| 7036 | you will need the latest `makeinfo' release, which will be available in |
| 7037 | a future texinfo-X.Y release. |
| 7038 | |
| 7039 | *NOTE* The new texinfo.tex can cause old versions of TeX to hang. |
| 7040 | We're not sure exactly which versions have this problem, but it has |
| 7041 | been seen in 3.0. We highly recommend upgrading to TeX version 3.141 |
| 7042 | or better. If that isn't possible, there is a patch in |
| 7043 | `texinfo/tex3patch' that will modify `texinfo/texinfo.tex' to work |
| 7044 | around this problem. |
| 7045 | |
| 7046 | * New features |
| 7047 | |
| 7048 | GDB now supports array constants that can be used in expressions typed in by |
| 7049 | the user. The syntax is `{element, element, ...}'. Ie: you can now type |
| 7050 | `print {1, 2, 3}', and it will build up an array in memory malloc'd in |
| 7051 | the target program. |
| 7052 | |
| 7053 | The new directory `gdb/sparclite' contains a program that demonstrates |
| 7054 | how the sparc-stub.c remote stub runs on a Fujitsu SPARClite processor. |
| 7055 | |
| 7056 | * New native hosts supported |
| 7057 | |
| 7058 | HP/PA-RISC under HPUX using GNU tools hppa1.1-hp-hpux |
| 7059 | 386 CPUs running SCO Unix 3.2v4 i386-unknown-sco3.2v4 |
| 7060 | |
| 7061 | * New targets supported |
| 7062 | |
| 7063 | AMD 29k family via UDI a29k-amd-udi or udi29k |
| 7064 | |
| 7065 | * New file formats supported |
| 7066 | |
| 7067 | BFD now supports reading HP/PA-RISC executables (SOM file format?), |
| 7068 | HPUX core files, and SCO 3.2v2 core files. |
| 7069 | |
| 7070 | * Major bug fixes |
| 7071 | |
| 7072 | Attaching to processes now works again; thanks for the many bug reports. |
| 7073 | |
| 7074 | We have also stomped on a bunch of core dumps caused by |
| 7075 | printf_filtered("%s") problems. |
| 7076 | |
| 7077 | We eliminated a copyright problem on the rpc and ptrace header files |
| 7078 | for VxWorks, which was discovered at the last minute during the 4.7 |
| 7079 | release. You should now be able to build a VxWorks GDB. |
| 7080 | |
| 7081 | You can now interrupt gdb while an attached process is running. This |
| 7082 | will cause the attached process to stop, and give control back to GDB. |
| 7083 | |
| 7084 | We fixed problems caused by using too many file descriptors |
| 7085 | for reading symbols from object files and libraries. This was |
| 7086 | especially a problem for programs that used many (~100) shared |
| 7087 | libraries. |
| 7088 | |
| 7089 | The `step' command now only enters a subroutine if there is line number |
| 7090 | information for the subroutine. Otherwise it acts like the `next' |
| 7091 | command. Previously, `step' would enter subroutines if there was |
| 7092 | any debugging information about the routine. This avoids problems |
| 7093 | when using `cc -g1' on MIPS machines. |
| 7094 | |
| 7095 | * Internal improvements |
| 7096 | |
| 7097 | GDB's internal interfaces have been improved to make it easier to support |
| 7098 | debugging of multiple languages in the future. |
| 7099 | |
| 7100 | GDB now uses a common structure for symbol information internally. |
| 7101 | Minimal symbols (derived from linkage symbols in object files), partial |
| 7102 | symbols (from a quick scan of debug information), and full symbols |
| 7103 | contain a common subset of information, making it easier to write |
| 7104 | shared code that handles any of them. |
| 7105 | |
| 7106 | * New command line options |
| 7107 | |
| 7108 | We now accept --silent as an alias for --quiet. |
| 7109 | |
| 7110 | * Mmalloc licensing |
| 7111 | |
| 7112 | The memory-mapped-malloc library is now licensed under the GNU Library |
| 7113 | General Public License. |
| 7114 | |
| 7115 | *** Changes in GDB-4.7: |
| 7116 | |
| 7117 | * Host/native/target split |
| 7118 | |
| 7119 | GDB has had some major internal surgery to untangle the support for |
| 7120 | hosts and remote targets. Now, when you configure GDB for a remote |
| 7121 | target, it will no longer load in all of the support for debugging |
| 7122 | local programs on the host. When fully completed and tested, this will |
| 7123 | ensure that arbitrary host/target combinations are possible. |
| 7124 | |
| 7125 | The primary conceptual shift is to separate the non-portable code in |
| 7126 | GDB into three categories. Host specific code is required any time GDB |
| 7127 | is compiled on that host, regardless of the target. Target specific |
| 7128 | code relates to the peculiarities of the target, but can be compiled on |
| 7129 | any host. Native specific code is everything else: it can only be |
| 7130 | built when the host and target are the same system. Child process |
| 7131 | handling and core file support are two common `native' examples. |
| 7132 | |
| 7133 | GDB's use of /proc for controlling Unix child processes is now cleaner. |
| 7134 | It has been split out into a single module under the `target_ops' vector, |
| 7135 | plus two native-dependent functions for each system that uses /proc. |
| 7136 | |
| 7137 | * New hosts supported |
| 7138 | |
| 7139 | HP/Apollo 68k (under the BSD domain) m68k-apollo-bsd or apollo68bsd |
| 7140 | 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd |
| 7141 | 386 CPUs running SCO Unix i386-unknown-scosysv322 or i386sco |
| 7142 | |
| 7143 | * New targets supported |
| 7144 | |
| 7145 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite |
| 7146 | 68030 and CPU32 m68030-*-*, m68332-*-* |
| 7147 | |
| 7148 | * New native hosts supported |
| 7149 | |
| 7150 | 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd |
| 7151 | (386bsd is not well tested yet) |
| 7152 | 386 CPUs running SCO Unix i386-unknown-scosysv322 or sco |
| 7153 | |
| 7154 | * New file formats supported |
| 7155 | |
| 7156 | BFD now supports COFF files for the Zilog Z8000 microprocessor. It |
| 7157 | supports reading of `a.out.adobe' object files, which are an a.out |
| 7158 | format extended with minimal information about multiple sections. |
| 7159 | |
| 7160 | * New commands |
| 7161 | |
| 7162 | `show copying' is the same as the old `info copying'. |
| 7163 | `show warranty' is the same as `info warrantee'. |
| 7164 | These were renamed for consistency. The old commands continue to work. |
| 7165 | |
| 7166 | `info handle' is a new alias for `info signals'. |
| 7167 | |
| 7168 | You can now define pre-command hooks, which attach arbitrary command |
| 7169 | scripts to any command. The commands in the hook will be executed |
| 7170 | prior to the user's command. You can also create a hook which will be |
| 7171 | executed whenever the program stops. See gdb.texinfo. |
| 7172 | |
| 7173 | * C++ improvements |
| 7174 | |
| 7175 | We now deal with Cfront style name mangling, and can even extract type |
| 7176 | info from mangled symbols. GDB can automatically figure out which |
| 7177 | symbol mangling style your C++ compiler uses. |
| 7178 | |
| 7179 | Calling of methods and virtual functions has been improved as well. |
| 7180 | |
| 7181 | * Major bug fixes |
| 7182 | |
| 7183 | The crash that occured when debugging Sun Ansi-C compiled binaries is |
| 7184 | fixed. This was due to mishandling of the extra N_SO stabs output |
| 7185 | by the compiler. |
| 7186 | |
| 7187 | We also finally got Ultrix 4.2 running in house, and fixed core file |
| 7188 | support, with help from a dozen people on the net. |
| 7189 | |
| 7190 | John M. Farrell discovered that the reason that single-stepping was so |
| 7191 | slow on all of the Mips based platforms (primarily SGI and DEC) was |
| 7192 | that we were trying to demangle and lookup a symbol used for internal |
| 7193 | purposes on every instruction that was being stepped through. Changing |
| 7194 | the name of that symbol so that it couldn't be mistaken for a C++ |
| 7195 | mangled symbol sped things up a great deal. |
| 7196 | |
| 7197 | Rich Pixley sped up symbol lookups in general by getting much smarter |
| 7198 | about when C++ symbol mangling is necessary. This should make symbol |
| 7199 | completion (TAB on the command line) much faster. It's not as fast as |
| 7200 | we'd like, but it's significantly faster than gdb-4.6. |
| 7201 | |
| 7202 | * AMD 29k support |
| 7203 | |
| 7204 | A new user controllable variable 'call_scratch_address' can |
| 7205 | specify the location of a scratch area to be used when GDB |
| 7206 | calls a function in the target. This is necessary because the |
| 7207 | usual method of putting the scratch area on the stack does not work |
| 7208 | in systems that have separate instruction and data spaces. |
| 7209 | |
| 7210 | We integrated changes to support the 29k UDI (Universal Debugger |
| 7211 | Interface), but discovered at the last minute that we didn't have all |
| 7212 | of the appropriate copyright paperwork. We are working with AMD to |
| 7213 | resolve this, and hope to have it available soon. |
| 7214 | |
| 7215 | * Remote interfaces |
| 7216 | |
| 7217 | We have sped up the remote serial line protocol, especially for targets |
| 7218 | with lots of registers. It now supports a new `expedited status' ('T') |
| 7219 | message which can be used in place of the existing 'S' status message. |
| 7220 | This allows the remote stub to send only the registers that GDB |
| 7221 | needs to make a quick decision about single-stepping or conditional |
| 7222 | breakpoints, eliminating the need to fetch the entire register set for |
| 7223 | each instruction being stepped through. |
| 7224 | |
| 7225 | The GDB remote serial protocol now implements a write-through cache for |
| 7226 | registers, only re-reading the registers if the target has run. |
| 7227 | |
| 7228 | There is also a new remote serial stub for SPARC processors. You can |
| 7229 | find it in gdb-4.7/gdb/sparc-stub.c. This was written to support the |
| 7230 | Fujitsu SPARClite processor, but will run on any stand-alone SPARC |
| 7231 | processor with a serial port. |
| 7232 | |
| 7233 | * Configuration |
| 7234 | |
| 7235 | Configure.in files have become much easier to read and modify. A new |
| 7236 | `table driven' format makes it more obvious what configurations are |
| 7237 | supported, and what files each one uses. |
| 7238 | |
| 7239 | * Library changes |
| 7240 | |
| 7241 | There is a new opcodes library which will eventually contain all of the |
| 7242 | disassembly routines and opcode tables. At present, it only contains |
| 7243 | Sparc and Z8000 routines. This will allow the assembler, debugger, and |
| 7244 | disassembler (binutils/objdump) to share these routines. |
| 7245 | |
| 7246 | The libiberty library is now copylefted under the GNU Library General |
| 7247 | Public License. This allows more liberal use, and was done so libg++ |
| 7248 | can use it. This makes no difference to GDB, since the Library License |
| 7249 | grants all the rights from the General Public License. |
| 7250 | |
| 7251 | * Documentation |
| 7252 | |
| 7253 | The file gdb-4.7/gdb/doc/stabs.texinfo is a (relatively) complete |
| 7254 | reference to the stabs symbol info used by the debugger. It is (as far |
| 7255 | as we know) the only published document on this fascinating topic. We |
| 7256 | encourage you to read it, compare it to the stabs information on your |
| 7257 | system, and send improvements on the document in general (to |
| 7258 | bug-gdb@prep.ai.mit.edu). |
| 7259 | |
| 7260 | And, of course, many bugs have been fixed. |
| 7261 | |
| 7262 | |
| 7263 | *** Changes in GDB-4.6: |
| 7264 | |
| 7265 | * Better support for C++ function names |
| 7266 | |
| 7267 | GDB now accepts as input the "demangled form" of C++ overloaded function |
| 7268 | names and member function names, and can do command completion on such names |
| 7269 | (using TAB, TAB-TAB, and ESC-?). The names have to be quoted with a pair of |
| 7270 | single quotes. Examples are 'func (int, long)' and 'obj::operator==(obj&)'. |
| 7271 | Make use of command completion, it is your friend. |
| 7272 | |
| 7273 | GDB also now accepts a variety of C++ mangled symbol formats. They are |
| 7274 | the GNU g++ style, the Cfront (ARM) style, and the Lucid (lcc) style. |
| 7275 | You can tell GDB which format to use by doing a 'set demangle-style {gnu, |
| 7276 | lucid, cfront, auto}'. 'gnu' is the default. Do a 'set demangle-style foo' |
| 7277 | for the list of formats. |
| 7278 | |
| 7279 | * G++ symbol mangling problem |
| 7280 | |
| 7281 | Recent versions of gcc have a bug in how they emit debugging information for |
| 7282 | C++ methods (when using dbx-style stabs). The file 'gcc.patch' (in this |
| 7283 | directory) can be applied to gcc to fix the problem. Alternatively, if you |
| 7284 | can't fix gcc, you can #define GCC_MANGLE_BUG when compling gdb/symtab.c. The |
| 7285 | usual symptom is difficulty with setting breakpoints on methods. GDB complains |
| 7286 | about the method being non-existent. (We believe that version 2.2.2 of GCC has |
| 7287 | this problem.) |
| 7288 | |
| 7289 | * New 'maintenance' command |
| 7290 | |
| 7291 | All of the commands related to hacking GDB internals have been moved out of |
| 7292 | the main command set, and now live behind the 'maintenance' command. This |
| 7293 | can also be abbreviated as 'mt'. The following changes were made: |
| 7294 | |
| 7295 | dump-me -> maintenance dump-me |
| 7296 | info all-breakpoints -> maintenance info breakpoints |
| 7297 | printmsyms -> maintenance print msyms |
| 7298 | printobjfiles -> maintenance print objfiles |
| 7299 | printpsyms -> maintenance print psymbols |
| 7300 | printsyms -> maintenance print symbols |
| 7301 | |
| 7302 | The following commands are new: |
| 7303 | |
| 7304 | maintenance demangle Call internal GDB demangler routine to |
| 7305 | demangle a C++ link name and prints the result. |
| 7306 | maintenance print type Print a type chain for a given symbol |
| 7307 | |
| 7308 | * Change to .gdbinit file processing |
| 7309 | |
| 7310 | We now read the $HOME/.gdbinit file before processing the argv arguments |
| 7311 | (e.g. reading symbol files or core files). This allows global parameters to |
| 7312 | be set, which will apply during the symbol reading. The ./.gdbinit is still |
| 7313 | read after argv processing. |
| 7314 | |
| 7315 | * New hosts supported |
| 7316 | |
| 7317 | Solaris-2.0 !!! sparc-sun-solaris2 or sun4sol2 |
| 7318 | |
| 7319 | GNU/Linux support i386-unknown-linux or linux |
| 7320 | |
| 7321 | We are also including code to support the HP/PA running BSD and HPUX. This |
| 7322 | is almost guaranteed not to work, as we didn't have time to test or build it |
| 7323 | for this release. We are including it so that the more adventurous (or |
| 7324 | masochistic) of you can play with it. We also had major problems with the |
| 7325 | fact that the compiler that we got from HP doesn't support the -g option. |
| 7326 | It costs extra. |
| 7327 | |
| 7328 | * New targets supported |
| 7329 | |
| 7330 | Hitachi H8/300 h8300-hitachi-hms or h8300hms |
| 7331 | |
| 7332 | * More smarts about finding #include files |
| 7333 | |
| 7334 | GDB now remembers the compilation directory for all include files, and for |
| 7335 | all files from which C is generated (like yacc and lex sources). This |
| 7336 | greatly improves GDB's ability to find yacc/lex sources, and include files, |
| 7337 | especially if you are debugging your program from a directory different from |
| 7338 | the one that contains your sources. |
| 7339 | |
| 7340 | We also fixed a bug which caused difficulty with listing and setting |
| 7341 | breakpoints in include files which contain C code. (In the past, you had to |
| 7342 | try twice in order to list an include file that you hadn't looked at before.) |
| 7343 | |
| 7344 | * Interesting infernals change |
| 7345 | |
| 7346 | GDB now deals with arbitrary numbers of sections, where the symbols for each |
| 7347 | section must be relocated relative to that section's landing place in the |
| 7348 | target's address space. This work was needed to support ELF with embedded |
| 7349 | stabs used by Solaris-2.0. |
| 7350 | |
| 7351 | * Bug fixes (of course!) |
| 7352 | |
| 7353 | There have been loads of fixes for the following things: |
| 7354 | mips, rs6000, 29k/udi, m68k, g++, type handling, elf/dwarf, m88k, |
| 7355 | i960, stabs, DOS(GO32), procfs, etc... |
| 7356 | |
| 7357 | See the ChangeLog for details. |
| 7358 | |
| 7359 | *** Changes in GDB-4.5: |
| 7360 | |
| 7361 | * New machines supported (host and target) |
| 7362 | |
| 7363 | IBM RS6000 running AIX rs6000-ibm-aix or rs6000 |
| 7364 | |
| 7365 | SGI Irix-4.x mips-sgi-irix4 or iris4 |
| 7366 | |
| 7367 | * New malloc package |
| 7368 | |
| 7369 | GDB now uses a new memory manager called mmalloc, based on gmalloc. |
| 7370 | Mmalloc is capable of handling mutiple heaps of memory. It is also |
| 7371 | capable of saving a heap to a file, and then mapping it back in later. |
| 7372 | This can be used to greatly speedup the startup of GDB by using a |
| 7373 | pre-parsed symbol table which lives in a mmalloc managed heap. For |
| 7374 | more details, please read mmalloc/mmalloc.texi. |
| 7375 | |
| 7376 | * info proc |
| 7377 | |
| 7378 | The 'info proc' command (SVR4 only) has been enhanced quite a bit. See |
| 7379 | 'help info proc' for details. |
| 7380 | |
| 7381 | * MIPS ecoff symbol table format |
| 7382 | |
| 7383 | The code that reads MIPS symbol table format is now supported on all hosts. |
| 7384 | Thanks to MIPS for releasing the sym.h and symconst.h files to make this |
| 7385 | possible. |
| 7386 | |
| 7387 | * File name changes for MS-DOS |
| 7388 | |
| 7389 | Many files in the config directories have been renamed to make it easier to |
| 7390 | support GDB on MS-DOSe systems (which have very restrictive file name |
| 7391 | conventions :-( ). MS-DOSe host support (under DJ Delorie's GO32 |
| 7392 | environment) is close to working but has some remaining problems. Note |
| 7393 | that debugging of DOS programs is not supported, due to limitations |
| 7394 | in the ``operating system'', but it can be used to host cross-debugging. |
| 7395 | |
| 7396 | * Cross byte order fixes |
| 7397 | |
| 7398 | Many fixes have been made to support cross debugging of Sparc and MIPS |
| 7399 | targets from hosts whose byte order differs. |
| 7400 | |
| 7401 | * New -mapped and -readnow options |
| 7402 | |
| 7403 | If memory-mapped files are available on your system through the 'mmap' |
| 7404 | system call, you can use the -mapped option on the `file' or |
| 7405 | `symbol-file' commands to cause GDB to write the symbols from your |
| 7406 | program into a reusable file. If the program you are debugging is |
| 7407 | called `/path/fred', the mapped symbol file will be `./fred.syms'. |
| 7408 | Future GDB debugging sessions will notice the presence of this file, |
| 7409 | and will quickly map in symbol information from it, rather than reading |
| 7410 | the symbol table from the executable program. Using the '-mapped' |
| 7411 | option in a GDB `file' or `symbol-file' command has the same effect as |
| 7412 | starting GDB with the '-mapped' command-line option. |
| 7413 | |
| 7414 | You can cause GDB to read the entire symbol table immediately by using |
| 7415 | the '-readnow' option with any of the commands that load symbol table |
| 7416 | information (or on the GDB command line). This makes the command |
| 7417 | slower, but makes future operations faster. |
| 7418 | |
| 7419 | The -mapped and -readnow options are typically combined in order to |
| 7420 | build a `fred.syms' file that contains complete symbol information. |
| 7421 | A simple GDB invocation to do nothing but build a `.syms' file for future |
| 7422 | use is: |
| 7423 | |
| 7424 | gdb -batch -nx -mapped -readnow programname |
| 7425 | |
| 7426 | The `.syms' file is specific to the host machine on which GDB is run. |
| 7427 | It holds an exact image of GDB's internal symbol table. It cannot be |
| 7428 | shared across multiple host platforms. |
| 7429 | |
| 7430 | * longjmp() handling |
| 7431 | |
| 7432 | GDB is now capable of stepping and nexting over longjmp(), _longjmp(), and |
| 7433 | siglongjmp() without losing control. This feature has not yet been ported to |
| 7434 | all systems. It currently works on many 386 platforms, all MIPS-based |
| 7435 | platforms (SGI, DECstation, etc), and Sun3/4. |
| 7436 | |
| 7437 | * Solaris 2.0 |
| 7438 | |
| 7439 | Preliminary work has been put in to support the new Solaris OS from Sun. At |
| 7440 | this time, it can control and debug processes, but it is not capable of |
| 7441 | reading symbols. |
| 7442 | |
| 7443 | * Bug fixes |
| 7444 | |
| 7445 | As always, many many bug fixes. The major areas were with g++, and mipsread. |
| 7446 | People using the MIPS-based platforms should experience fewer mysterious |
| 7447 | crashes and trashed symbol tables. |
| 7448 | |
| 7449 | *** Changes in GDB-4.4: |
| 7450 | |
| 7451 | * New machines supported (host and target) |
| 7452 | |
| 7453 | SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco |
| 7454 | (except core files) |
| 7455 | BSD Reno on Vax vax-dec-bsd |
| 7456 | Ultrix on Vax vax-dec-ultrix |
| 7457 | |
| 7458 | * New machines supported (target) |
| 7459 | |
| 7460 | AMD 29000 embedded, using EBMON a29k-none-none |
| 7461 | |
| 7462 | * C++ support |
| 7463 | |
| 7464 | GDB continues to improve its handling of C++. `References' work better. |
| 7465 | The demangler has also been improved, and now deals with symbols mangled as |
| 7466 | per the Annotated C++ Reference Guide. |
| 7467 | |
| 7468 | GDB also now handles `stabs' symbol information embedded in MIPS |
| 7469 | `ecoff' symbol tables. Since the ecoff format was not easily |
| 7470 | extensible to handle new languages such as C++, this appeared to be a |
| 7471 | good way to put C++ debugging info into MIPS binaries. This option |
| 7472 | will be supported in the GNU C compiler, version 2, when it is |
| 7473 | released. |
| 7474 | |
| 7475 | * New features for SVR4 |
| 7476 | |
| 7477 | GDB now handles SVR4 shared libraries, in the same fashion as SunOS |
| 7478 | shared libraries. Debugging dynamically linked programs should present |
| 7479 | only minor differences from debugging statically linked programs. |
| 7480 | |
| 7481 | The `info proc' command will print out information about any process |
| 7482 | on an SVR4 system (including the one you are debugging). At the moment, |
| 7483 | it prints the address mappings of the process. |
| 7484 | |
| 7485 | If you bring up GDB on another SVR4 system, please send mail to |
| 7486 | bug-gdb@prep.ai.mit.edu to let us know what changes were reqired (if any). |
| 7487 | |
| 7488 | * Better dynamic linking support in SunOS |
| 7489 | |
| 7490 | Reading symbols from shared libraries which contain debugging symbols |
| 7491 | now works properly. However, there remain issues such as automatic |
| 7492 | skipping of `transfer vector' code during function calls, which |
| 7493 | make it harder to debug code in a shared library, than to debug the |
| 7494 | same code linked statically. |
| 7495 | |
| 7496 | * New Getopt |
| 7497 | |
| 7498 | GDB is now using the latest `getopt' routines from the FSF. This |
| 7499 | version accepts the -- prefix for options with long names. GDB will |
| 7500 | continue to accept the old forms (-option and +option) as well. |
| 7501 | Various single letter abbreviations for options have been explicity |
| 7502 | added to the option table so that they won't get overshadowed in the |
| 7503 | future by other options that begin with the same letter. |
| 7504 | |
| 7505 | * Bugs fixed |
| 7506 | |
| 7507 | The `cleanup_undefined_types' bug that many of you noticed has been squashed. |
| 7508 | Many assorted bugs have been handled. Many more remain to be handled. |
| 7509 | See the various ChangeLog files (primarily in gdb and bfd) for details. |
| 7510 | |
| 7511 | |
| 7512 | *** Changes in GDB-4.3: |
| 7513 | |
| 7514 | * New machines supported (host and target) |
| 7515 | |
| 7516 | Amiga 3000 running Amix m68k-cbm-svr4 or amix |
| 7517 | NCR 3000 386 running SVR4 i386-ncr-svr4 or ncr3000 |
| 7518 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 |
| 7519 | |
| 7520 | * Almost SCO Unix support |
| 7521 | |
| 7522 | We had hoped to support: |
| 7523 | SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco |
| 7524 | (except for core file support), but we discovered very late in the release |
| 7525 | that it has problems with process groups that render gdb unusable. Sorry |
| 7526 | about that. I encourage people to fix it and post the fixes. |
| 7527 | |
| 7528 | * Preliminary ELF and DWARF support |
| 7529 | |
| 7530 | GDB can read ELF object files on System V Release 4, and can handle |
| 7531 | debugging records for C, in DWARF format, in ELF files. This support |
| 7532 | is preliminary. If you bring up GDB on another SVR4 system, please |
| 7533 | send mail to bug-gdb@prep.ai.mit.edu to let us know what changes were |
| 7534 | reqired (if any). |
| 7535 | |
| 7536 | * New Readline |
| 7537 | |
| 7538 | GDB now uses the latest `readline' library. One user-visible change |
| 7539 | is that two tabs will list possible command completions, which previously |
| 7540 | required typing M-? (meta-question mark, or ESC ?). |
| 7541 | |
| 7542 | * Bugs fixed |
| 7543 | |
| 7544 | The `stepi' bug that many of you noticed has been squashed. |
| 7545 | Many bugs in C++ have been handled. Many more remain to be handled. |
| 7546 | See the various ChangeLog files (primarily in gdb and bfd) for details. |
| 7547 | |
| 7548 | * State of the MIPS world (in case you wondered): |
| 7549 | |
| 7550 | GDB can understand the symbol tables emitted by the compilers |
| 7551 | supplied by most vendors of MIPS-based machines, including DEC. These |
| 7552 | symbol tables are in a format that essentially nobody else uses. |
| 7553 | |
| 7554 | Some versions of gcc come with an assembler post-processor called |
| 7555 | mips-tfile. This program is required if you want to do source-level |
| 7556 | debugging of gcc-compiled programs. I believe FSF does not ship |
| 7557 | mips-tfile with gcc version 1, but it will eventually come with gcc |
| 7558 | version 2. |
| 7559 | |
| 7560 | Debugging of g++ output remains a problem. g++ version 1.xx does not |
| 7561 | really support it at all. (If you're lucky, you should be able to get |
| 7562 | line numbers and stack traces to work, but no parameters or local |
| 7563 | variables.) With some work it should be possible to improve the |
| 7564 | situation somewhat. |
| 7565 | |
| 7566 | When gcc version 2 is released, you will have somewhat better luck. |
| 7567 | However, even then you will get confusing results for inheritance and |
| 7568 | methods. |
| 7569 | |
| 7570 | We will eventually provide full debugging of g++ output on |
| 7571 | DECstations. This will probably involve some kind of stabs-in-ecoff |
| 7572 | encapulation, but the details have not been worked out yet. |
| 7573 | |
| 7574 | |
| 7575 | *** Changes in GDB-4.2: |
| 7576 | |
| 7577 | * Improved configuration |
| 7578 | |
| 7579 | Only one copy of `configure' exists now, and it is not self-modifying. |
| 7580 | Porting BFD is simpler. |
| 7581 | |
| 7582 | * Stepping improved |
| 7583 | |
| 7584 | The `step' and `next' commands now only stop at the first instruction |
| 7585 | of a source line. This prevents the multiple stops that used to occur |
| 7586 | in switch statements, for-loops, etc. `Step' continues to stop if a |
| 7587 | function that has debugging information is called within the line. |
| 7588 | |
| 7589 | * Bug fixing |
| 7590 | |
| 7591 | Lots of small bugs fixed. More remain. |
| 7592 | |
| 7593 | * New host supported (not target) |
| 7594 | |
| 7595 | Intel 386 PC clone running Mach i386-none-mach |
| 7596 | |
| 7597 | |
| 7598 | *** Changes in GDB-4.1: |
| 7599 | |
| 7600 | * Multiple source language support |
| 7601 | |
| 7602 | GDB now has internal scaffolding to handle several source languages. |
| 7603 | It determines the type of each source file from its filename extension, |
| 7604 | and will switch expression parsing and number formatting to match the |
| 7605 | language of the function in the currently selected stack frame. |
| 7606 | You can also specifically set the language to be used, with |
| 7607 | `set language c' or `set language modula-2'. |
| 7608 | |
| 7609 | * GDB and Modula-2 |
| 7610 | |
| 7611 | GDB now has preliminary support for the GNU Modula-2 compiler, |
| 7612 | currently under development at the State University of New York at |
| 7613 | Buffalo. Development of both GDB and the GNU Modula-2 compiler will |
| 7614 | continue through the fall of 1991 and into 1992. |
| 7615 | |
| 7616 | Other Modula-2 compilers are currently not supported, and attempting to |
| 7617 | debug programs compiled with them will likely result in an error as the |
| 7618 | symbol table is read. Feel free to work on it, though! |
| 7619 | |
| 7620 | There are hooks in GDB for strict type checking and range checking, |
| 7621 | in the `Modula-2 philosophy', but they do not currently work. |
| 7622 | |
| 7623 | * set write on/off |
| 7624 | |
| 7625 | GDB can now write to executable and core files (e.g. patch |
| 7626 | a variable's value). You must turn this switch on, specify |
| 7627 | the file ("exec foo" or "core foo"), *then* modify it, e.g. |
| 7628 | by assigning a new value to a variable. Modifications take |
| 7629 | effect immediately. |
| 7630 | |
| 7631 | * Automatic SunOS shared library reading |
| 7632 | |
| 7633 | When you run your program, GDB automatically determines where its |
| 7634 | shared libraries (if any) have been loaded, and reads their symbols. |
| 7635 | The `share' command is no longer needed. This also works when |
| 7636 | examining core files. |
| 7637 | |
| 7638 | * set listsize |
| 7639 | |
| 7640 | You can specify the number of lines that the `list' command shows. |
| 7641 | The default is 10. |
| 7642 | |
| 7643 | * New machines supported (host and target) |
| 7644 | |
| 7645 | SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris |
| 7646 | Sony NEWS (68K) running NEWSOS 3.x: m68k-sony-sysv or news |
| 7647 | Ultracomputer (29K) running Sym1: a29k-nyu-sym1 or ultra3 |
| 7648 | |
| 7649 | * New hosts supported (not targets) |
| 7650 | |
| 7651 | IBM RT/PC: romp-ibm-aix or rtpc |
| 7652 | |
| 7653 | * New targets supported (not hosts) |
| 7654 | |
| 7655 | AMD 29000 embedded with COFF a29k-none-coff |
| 7656 | AMD 29000 embedded with a.out a29k-none-aout |
| 7657 | Ultracomputer remote kernel debug a29k-nyu-kern |
| 7658 | |
| 7659 | * New remote interfaces |
| 7660 | |
| 7661 | AMD 29000 Adapt |
| 7662 | AMD 29000 Minimon |
| 7663 | |
| 7664 | |
| 7665 | *** Changes in GDB-4.0: |
| 7666 | |
| 7667 | * New Facilities |
| 7668 | |
| 7669 | Wide output is wrapped at good places to make the output more readable. |
| 7670 | |
| 7671 | Gdb now supports cross-debugging from a host machine of one type to a |
| 7672 | target machine of another type. Communication with the target system |
| 7673 | is over serial lines. The ``target'' command handles connecting to the |
| 7674 | remote system; the ``load'' command will download a program into the |
| 7675 | remote system. Serial stubs for the m68k and i386 are provided. Gdb |
| 7676 | also supports debugging of realtime processes running under VxWorks, |
| 7677 | using SunRPC Remote Procedure Calls over TCP/IP to talk to a debugger |
| 7678 | stub on the target system. |
| 7679 | |
| 7680 | New CPUs supported include the AMD 29000 and Intel 960. |
| 7681 | |
| 7682 | GDB now reads object files and symbol tables via a ``binary file'' |
| 7683 | library, which allows a single copy of GDB to debug programs of multiple |
| 7684 | object file types such as a.out and coff. |
| 7685 | |
| 7686 | There is now a GDB reference card in "doc/refcard.tex". (Make targets |
| 7687 | refcard.dvi and refcard.ps are available to format it). |
| 7688 | |
| 7689 | |
| 7690 | * Control-Variable user interface simplified |
| 7691 | |
| 7692 | All variables that control the operation of the debugger can be set |
| 7693 | by the ``set'' command, and displayed by the ``show'' command. |
| 7694 | |
| 7695 | For example, ``set prompt new-gdb=>'' will change your prompt to new-gdb=>. |
| 7696 | ``Show prompt'' produces the response: |
| 7697 | Gdb's prompt is new-gdb=>. |
| 7698 | |
| 7699 | What follows are the NEW set commands. The command ``help set'' will |
| 7700 | print a complete list of old and new set commands. ``help set FOO'' |
| 7701 | will give a longer description of the variable FOO. ``show'' will show |
| 7702 | all of the variable descriptions and their current settings. |
| 7703 | |
| 7704 | confirm on/off: Enables warning questions for operations that are |
| 7705 | hard to recover from, e.g. rerunning the program while |
| 7706 | it is already running. Default is ON. |
| 7707 | |
| 7708 | editing on/off: Enables EMACS style command line editing |
| 7709 | of input. Previous lines can be recalled with |
| 7710 | control-P, the current line can be edited with control-B, |
| 7711 | you can search for commands with control-R, etc. |
| 7712 | Default is ON. |
| 7713 | |
| 7714 | history filename NAME: NAME is where the gdb command history |
| 7715 | will be stored. The default is .gdb_history, |
| 7716 | or the value of the environment variable |
| 7717 | GDBHISTFILE. |
| 7718 | |
| 7719 | history size N: The size, in commands, of the command history. The |
| 7720 | default is 256, or the value of the environment variable |
| 7721 | HISTSIZE. |
| 7722 | |
| 7723 | history save on/off: If this value is set to ON, the history file will |
| 7724 | be saved after exiting gdb. If set to OFF, the |
| 7725 | file will not be saved. The default is OFF. |
| 7726 | |
| 7727 | history expansion on/off: If this value is set to ON, then csh-like |
| 7728 | history expansion will be performed on |
| 7729 | command line input. The default is OFF. |
| 7730 | |
| 7731 | radix N: Sets the default radix for input and output. It can be set |
| 7732 | to 8, 10, or 16. Note that the argument to "radix" is interpreted |
| 7733 | in the current radix, so "set radix 10" is always a no-op. |
| 7734 | |
| 7735 | height N: This integer value is the number of lines on a page. Default |
| 7736 | is 24, the current `stty rows'' setting, or the ``li#'' |
| 7737 | setting from the termcap entry matching the environment |
| 7738 | variable TERM. |
| 7739 | |
| 7740 | width N: This integer value is the number of characters on a line. |
| 7741 | Default is 80, the current `stty cols'' setting, or the ``co#'' |
| 7742 | setting from the termcap entry matching the environment |
| 7743 | variable TERM. |
| 7744 | |
| 7745 | Note: ``set screensize'' is obsolete. Use ``set height'' and |
| 7746 | ``set width'' instead. |
| 7747 | |
| 7748 | print address on/off: Print memory addresses in various command displays, |
| 7749 | such as stack traces and structure values. Gdb looks |
| 7750 | more ``symbolic'' if you turn this off; it looks more |
| 7751 | ``machine level'' with it on. Default is ON. |
| 7752 | |
| 7753 | print array on/off: Prettyprint arrays. New convenient format! Default |
| 7754 | is OFF. |
| 7755 | |
| 7756 | print demangle on/off: Print C++ symbols in "source" form if on, |
| 7757 | "raw" form if off. |
| 7758 | |
| 7759 | print asm-demangle on/off: Same, for assembler level printouts |
| 7760 | like instructions. |
| 7761 | |
| 7762 | print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF. |
| 7763 | |
| 7764 | |
| 7765 | * Support for Epoch Environment. |
| 7766 | |
| 7767 | The epoch environment is a version of Emacs v18 with windowing. One |
| 7768 | new command, ``inspect'', is identical to ``print'', except that if you |
| 7769 | are running in the epoch environment, the value is printed in its own |
| 7770 | window. |
| 7771 | |
| 7772 | |
| 7773 | * Support for Shared Libraries |
| 7774 | |
| 7775 | GDB can now debug programs and core files that use SunOS shared libraries. |
| 7776 | Symbols from a shared library cannot be referenced |
| 7777 | before the shared library has been linked with the program (this |
| 7778 | happens after you type ``run'' and before the function main() is entered). |
| 7779 | At any time after this linking (including when examining core files |
| 7780 | from dynamically linked programs), gdb reads the symbols from each |
| 7781 | shared library when you type the ``sharedlibrary'' command. |
| 7782 | It can be abbreviated ``share''. |
| 7783 | |
| 7784 | sharedlibrary REGEXP: Load shared object library symbols for files |
| 7785 | matching a unix regular expression. No argument |
| 7786 | indicates to load symbols for all shared libraries. |
| 7787 | |
| 7788 | info sharedlibrary: Status of loaded shared libraries. |
| 7789 | |
| 7790 | |
| 7791 | * Watchpoints |
| 7792 | |
| 7793 | A watchpoint stops execution of a program whenever the value of an |
| 7794 | expression changes. Checking for this slows down execution |
| 7795 | tremendously whenever you are in the scope of the expression, but is |
| 7796 | quite useful for catching tough ``bit-spreader'' or pointer misuse |
| 7797 | problems. Some machines such as the 386 have hardware for doing this |
| 7798 | more quickly, and future versions of gdb will use this hardware. |
| 7799 | |
| 7800 | watch EXP: Set a watchpoint (breakpoint) for an expression. |
| 7801 | |
| 7802 | info watchpoints: Information about your watchpoints. |
| 7803 | |
| 7804 | delete N: Deletes watchpoint number N (same as breakpoints). |
| 7805 | disable N: Temporarily turns off watchpoint number N (same as breakpoints). |
| 7806 | enable N: Re-enables watchpoint number N (same as breakpoints). |
| 7807 | |
| 7808 | |
| 7809 | * C++ multiple inheritance |
| 7810 | |
| 7811 | When used with a GCC version 2 compiler, GDB supports multiple inheritance |
| 7812 | for C++ programs. |
| 7813 | |
| 7814 | * C++ exception handling |
| 7815 | |
| 7816 | Gdb now supports limited C++ exception handling. Besides the existing |
| 7817 | ability to breakpoint on an exception handler, gdb can breakpoint on |
| 7818 | the raising of an exception (before the stack is peeled back to the |
| 7819 | handler's context). |
| 7820 | |
| 7821 | catch FOO: If there is a FOO exception handler in the dynamic scope, |
| 7822 | set a breakpoint to catch exceptions which may be raised there. |
| 7823 | Multiple exceptions (``catch foo bar baz'') may be caught. |
| 7824 | |
| 7825 | info catch: Lists all exceptions which may be caught in the |
| 7826 | current stack frame. |
| 7827 | |
| 7828 | |
| 7829 | * Minor command changes |
| 7830 | |
| 7831 | The command ``call func (arg, arg, ...)'' now acts like the print |
| 7832 | command, except it does not print or save a value if the function's result |
| 7833 | is void. This is similar to dbx usage. |
| 7834 | |
| 7835 | The ``up'' and ``down'' commands now always print the frame they end up |
| 7836 | at; ``up-silently'' and `down-silently'' can be used in scripts to change |
| 7837 | frames without printing. |
| 7838 | |
| 7839 | * New directory command |
| 7840 | |
| 7841 | 'dir' now adds directories to the FRONT of the source search path. |
| 7842 | The path starts off empty. Source files that contain debug information |
| 7843 | about the directory in which they were compiled can be found even |
| 7844 | with an empty path; Sun CC and GCC include this information. If GDB can't |
| 7845 | find your source file in the current directory, type "dir .". |
| 7846 | |
| 7847 | * Configuring GDB for compilation |
| 7848 | |
| 7849 | For normal use, type ``./configure host''. See README or gdb.texinfo |
| 7850 | for more details. |
| 7851 | |
| 7852 | GDB now handles cross debugging. If you are remotely debugging between |
| 7853 | two different machines, type ``./configure host -target=targ''. |
| 7854 | Host is the machine where GDB will run; targ is the machine |
| 7855 | where the program that you are debugging will run. |