Commit | Line | Data |
---|---|---|
c906108c SS |
1 | What has changed in GDB? |
2 | (Organized release by release) | |
3 | ||
8d5b6c2b | 4 | *** Changes since GDB 7.4 |
d6e00af6 | 5 | |
4795f398 DE |
6 | * Python scripting |
7 | ||
8 | ** The "maint set python print-stack on|off" is now deleted. | |
9 | ||
e0f9f062 DE |
10 | * GDBserver now supports stdio connections. |
11 | E.g. (gdb) target remote | ssh myhost gdbserver - hello | |
12 | ||
217bff3e JK |
13 | * The binary "gdbtui" can no longer be built or installed. |
14 | Use "gdb -tui" instead. | |
15 | ||
cafec441 TT |
16 | * GDB will now print "flag" enums specially. A flag enum is one where |
17 | all the enumerator values have no bits in common when pairwise | |
18 | "and"ed. When printing a value whose type is a flag enum, GDB will | |
19 | show all the constants, e.g., for enum E { ONE = 1, TWO = 2}: | |
20 | (gdb) print (enum E) 3 | |
21 | $1 = (ONE | TWO) | |
22 | ||
23 | * Python scripting | |
24 | ||
25 | ** A new class, gdb.printing.FlagEnumerationPrinter, can be used to | |
26 | apply "flag enum"-style pretty-printing to any enum. | |
27 | ||
4aac40c8 TT |
28 | * The filename part of a linespec will now match trailing components |
29 | of a source file name. For example, "break gcc/expr.c:1000" will | |
30 | now set a breakpoint in build/gcc/expr.c, but not | |
31 | build/libcpp/expr.c. | |
32 | ||
8837a20f JB |
33 | *** Changes in GDB 7.4 |
34 | ||
f8eba3c6 TT |
35 | * GDB now handles ambiguous linespecs more consistently; the existing |
36 | FILE:LINE support has been expanded to other types of linespecs. A | |
37 | breakpoint will now be set on all matching locations in all | |
38 | inferiors, and locations will be added or removed according to | |
39 | inferior changes. | |
40 | ||
1bfeeb0f JL |
41 | * GDB now allows you to skip uninteresting functions and files when |
42 | stepping with the "skip function" and "skip file" commands. | |
43 | ||
480a3f21 PW |
44 | * GDB has two new commands: "set remote hardware-watchpoint-length-limit" |
45 | and "show remote hardware-watchpoint-length-limit". These allows to | |
46 | set or show the maximum length limit (in bytes) of a remote | |
47 | target hardware watchpoint. | |
48 | ||
49 | This allows e.g. to use "unlimited" hardware watchpoints with the | |
50 | gdbserver integrated in Valgrind version >= 3.7.0. Such Valgrind | |
51 | watchpoints are slower than real hardware watchpoints but are | |
52 | significantly faster than gdb software watchpoints. | |
53 | ||
3a7bf607 PM |
54 | * Python scripting |
55 | ||
32d1c362 | 56 | ** The register_pretty_printer function in module gdb.printing now takes |
7d0aff21 | 57 | an optional `replace' argument. If True, the new printer replaces any |
32d1c362 DE |
58 | existing one. |
59 | ||
3a7bf607 | 60 | ** The "maint set python print-stack on|off" command has been |
4795f398 DE |
61 | deprecated and will be deleted in GDB 7.5. |
62 | A new command: "set python print-stack none|full|message" has | |
63 | replaced it. Additionally, the default for "print-stack" is | |
64 | now "message", which just prints the error message without | |
65 | the stack trace. | |
3a7bf607 | 66 | |
baacfb07 | 67 | ** A prompt substitution hook (prompt_hook) is now available to the |
3a7bf607 | 68 | Python API. |
713389e0 | 69 | |
fa3a4f15 PM |
70 | ** A new Python module, gdb.prompt has been added to the GDB Python |
71 | modules library. This module provides functionality for | |
baacfb07 | 72 | escape sequences in prompts (used by set/show |
fa3a4f15 PM |
73 | extended-prompt). These escape sequences are replaced by their |
74 | corresponding value. | |
75 | ||
5e239b84 PM |
76 | ** Python commands and convenience-functions located in |
77 | 'data-directory'/python/gdb/command and | |
78 | 'data-directory'/python/gdb/function are now automatically loaded | |
79 | on GDB start-up. | |
80 | ||
9df2fbc4 PM |
81 | ** Blocks now provide four new attributes. global_block and |
82 | static_block will return the global and static blocks | |
83 | respectively. is_static and is_global are boolean attributes | |
84 | that indicate if the block is one of those two types. | |
85 | ||
457e09f0 DE |
86 | ** Symbols now provide the "type" attribute, the type of the symbol. |
87 | ||
6839b47f KP |
88 | ** The "gdb.breakpoint" function has been deprecated in favor of |
89 | "gdb.breakpoints". | |
90 | ||
cc72b2a2 KP |
91 | ** A new class "gdb.FinishBreakpoint" is provided to catch the return |
92 | of a function. This class is based on the "finish" command | |
93 | available in the CLI. | |
94 | ||
84ad80e6 PK |
95 | ** Type objects for struct and union types now allow access to |
96 | the fields using standard Python dictionary (mapping) methods. | |
97 | For example, "some_type['myfield']" now works, as does | |
98 | "some_type.items()". | |
99 | ||
20c168b5 KP |
100 | ** A new event "gdb.new_objfile" has been added, triggered by loading a |
101 | new object file. | |
102 | ||
03c3051a PK |
103 | ** A new function, "deep_items" has been added to the gdb.types |
104 | module in the GDB Python modules library. This function returns | |
105 | an iterator over the fields of a struct or union type. Unlike | |
106 | the standard Python "iteritems" method, it will recursively traverse | |
107 | any anonymous fields. | |
108 | ||
7376e450 TT |
109 | * MI changes |
110 | ||
111 | ** "*stopped" events can report several new "reason"s, such as | |
112 | "solib-event". | |
113 | ||
114 | ** Breakpoint changes are now notified using new async records, like | |
115 | "=breakpoint-modified". | |
116 | ||
117 | ** New command -ada-task-info. | |
118 | ||
98a5dd13 DE |
119 | * libthread-db-search-path now supports two special values: $sdir and $pdir. |
120 | $sdir specifies the default system locations of shared libraries. | |
121 | $pdir specifies the directory where the libpthread used by the application | |
122 | lives. | |
123 | ||
124 | GDB no longer looks in $sdir and $pdir after it has searched the directories | |
125 | mentioned in libthread-db-search-path. If you want to search those | |
126 | directories, they must be specified in libthread-db-search-path. | |
127 | The default value of libthread-db-search-path on GNU/Linux and Solaris | |
128 | systems is now "$sdir:$pdir". | |
129 | ||
130 | $pdir is not supported by gdbserver, it is currently ignored. | |
131 | $sdir is supported by gdbserver. | |
132 | ||
478aac75 DE |
133 | * New configure option --with-iconv-bin. |
134 | When using the internationalization support like the one in the GNU C | |
135 | library, GDB will invoke the "iconv" program to get a list of supported | |
136 | character sets. If this program lives in a non-standard location, one can | |
137 | use this option to specify where to find it. | |
138 | ||
9c06b0b4 TJB |
139 | * When natively debugging programs on PowerPC BookE processors running |
140 | a Linux kernel version 2.6.34 or later, GDB supports masked hardware | |
141 | watchpoints, which specify a mask in addition to an address to watch. | |
142 | The mask specifies that some bits of an address (the bits which are | |
143 | reset in the mask) should be ignored when matching the address accessed | |
144 | by the inferior against the watchpoint address. See the "PowerPC Embedded" | |
145 | section in the user manual for more details. | |
146 | ||
03f2bd59 JK |
147 | * The new option --once causes GDBserver to stop listening for connections once |
148 | the first connection is made. The listening port used by GDBserver will | |
149 | become available after that. | |
150 | ||
71eba9c2 | 151 | * New commands "info macros" and "alias" have been added. |
edc84990 | 152 | |
2bda9cc5 JK |
153 | * New function parameters suffix @entry specifies value of function parameter |
154 | at the time the function got called. Entry values are available only since | |
155 | gcc version 4.7. | |
156 | ||
ed59ded5 DE |
157 | * New commands |
158 | ||
159 | !SHELL COMMAND | |
160 | "!" is now an alias of the "shell" command. | |
161 | Note that no space is needed between "!" and SHELL COMMAND. | |
162 | ||
9c06b0b4 TJB |
163 | * Changed commands |
164 | ||
165 | watch EXPRESSION mask MASK_VALUE | |
166 | The watch command now supports the mask argument which allows creation | |
167 | of masked watchpoints, if the current architecture supports this feature. | |
168 | ||
dbaefcf7 DE |
169 | info auto-load-scripts [REGEXP] |
170 | This command was formerly named "maintenance print section-scripts". | |
171 | It is now generally useful and is no longer a maintenance-only command. | |
172 | ||
71eba9c2 | 173 | info macro [-all] [--] MACRO |
174 | The info macro command has new options `-all' and `--'. The first for | |
175 | printing all definitions of a macro. The second for explicitly specifying | |
176 | the end of arguments and the beginning of the macro name in case the macro | |
177 | name starts with a hyphen. | |
178 | ||
3065dfb6 SS |
179 | collect[/s] EXPRESSIONS |
180 | The tracepoint collect command now takes an optional modifier "/s" | |
181 | that directs it to dereference pointer-to-character types and | |
182 | collect the bytes of memory up to a zero byte. The behavior is | |
183 | similar to what you see when you use the regular print command on a | |
184 | string. An optional integer following the "/s" sets a bound on the | |
185 | number of bytes that will be collected. | |
186 | ||
f196051f SS |
187 | tstart [NOTES] |
188 | The trace start command now interprets any supplied arguments as a | |
189 | note to be recorded with the trace run, with an effect similar to | |
190 | setting the variable trace-notes. | |
191 | ||
192 | tstop [NOTES] | |
193 | The trace stop command now interprets any arguments as a note to be | |
194 | mentioned along with the tstatus report that the trace was stopped | |
195 | with a command. The effect is similar to setting the variable | |
196 | trace-stop-notes. | |
197 | ||
d248b706 KY |
198 | * Tracepoints can now be enabled and disabled at any time after a trace |
199 | experiment has been started using the standard "enable" and "disable" | |
200 | commands. It is now possible to start a trace experiment with no enabled | |
201 | tracepoints; GDB will display a warning, but will allow the experiment to | |
202 | begin, assuming that tracepoints will be enabled as needed while the trace | |
203 | is running. | |
204 | ||
405f8e94 SS |
205 | * Fast tracepoints on 32-bit x86-architectures can now be placed at |
206 | locations with 4-byte instructions, when they were previously | |
207 | limited to locations with instructions of 5 bytes or longer. | |
208 | ||
2bda9cc5 JK |
209 | * New options |
210 | ||
baacfb07 PM |
211 | set extended-prompt |
212 | show extended-prompt | |
213 | Set the GDB prompt, and allow escape sequences to be inserted to | |
214 | display miscellaneous information (see 'help set extended-prompt' | |
215 | for the list of sequences). This prompt (and any information | |
216 | accessed through the escape sequences) is updated every time the | |
217 | prompt is displayed. | |
218 | ||
2bda9cc5 JK |
219 | set print entry-values (both|compact|default|if-needed|no|only|preferred) |
220 | show print entry-values | |
221 | Set printing of frame argument values at function entry. In some cases | |
222 | GDB can determine the value of function argument which was passed by the | |
223 | function caller, even if the value was modified inside the called function. | |
224 | ||
225 | set debug entry-values | |
226 | show debug entry-values | |
227 | Control display of debugging info for determining frame argument values at | |
228 | function entry and virtual tail call frames. | |
229 | ||
c011a4f4 DE |
230 | set basenames-may-differ |
231 | show basenames-may-differ | |
232 | Set whether a source file may have multiple base names. | |
233 | (A "base name" is the name of a file with the directory part removed. | |
234 | Example: The base name of "/home/user/hello.c" is "hello.c".) | |
235 | If set, GDB will canonicalize file names (e.g., expand symlinks) | |
236 | before comparing them. Canonicalization is an expensive operation, | |
237 | but it allows the same file be known by more than one base name. | |
238 | If not set (the default), all source files are assumed to have just | |
239 | one base name, and gdb will do file name comparisons more efficiently. | |
240 | ||
f196051f SS |
241 | set trace-user |
242 | show trace-user | |
243 | set trace-notes | |
244 | show trace-notes | |
245 | Set a user name and notes for the current and any future trace runs. | |
246 | This is useful for long-running and/or disconnected traces, to | |
247 | inform others (or yourself) as to who is running the trace, supply | |
248 | contact information, or otherwise explain what is going on. | |
249 | ||
250 | set trace-stop-notes | |
251 | show trace-stop-notes | |
252 | Set a note attached to the trace run, that is displayed when the | |
253 | trace has been stopped by a tstop command. This is useful for | |
254 | instance as an explanation, if you are stopping a trace run that was | |
255 | started by someone else. | |
256 | ||
d248b706 KY |
257 | * New remote packets |
258 | ||
259 | QTEnable | |
260 | ||
261 | Dynamically enable a tracepoint in a started trace experiment. | |
262 | ||
263 | QTDisable | |
264 | ||
265 | Dynamically disable a tracepoint in a started trace experiment. | |
266 | ||
f196051f SS |
267 | QTNotes |
268 | ||
269 | Set the user and notes of the trace run. | |
270 | ||
271 | qTP | |
272 | ||
273 | Query the current status of a tracepoint. | |
274 | ||
405f8e94 SS |
275 | qTMinFTPILen |
276 | ||
277 | Query the minimum length of instruction at which a fast tracepoint may | |
278 | be placed. | |
279 | ||
1a532630 PP |
280 | * Dcache size (number of lines) and line-size are now runtime-configurable |
281 | via "set dcache line" and "set dcache line-size" commands. | |
282 | ||
11315641 YQ |
283 | * New targets |
284 | ||
285 | Texas Instruments TMS320C6x tic6x-*-* | |
286 | ||
87326c78 DD |
287 | * New Simulators |
288 | ||
289 | Renesas RL78 rl78-*-elf | |
290 | ||
e8d56f18 JB |
291 | *** Changes in GDB 7.3.1 |
292 | ||
293 | * The build failure for NetBSD and OpenBSD targets have now been fixed. | |
294 | ||
d6e00af6 | 295 | *** Changes in GDB 7.3 |
797054e6 | 296 | |
60f98dde MS |
297 | * GDB has a new command: "thread find [REGEXP]". |
298 | It finds the thread id whose name, target id, or thread extra info | |
299 | matches the given regular expression. | |
300 | ||
eee5b35e DD |
301 | * The "catch syscall" command now works on mips*-linux* targets. |
302 | ||
b716877b AB |
303 | * The -data-disassemble MI command now supports modes 2 and 3 for |
304 | dumping the instruction opcodes. | |
305 | ||
aae1c79a DE |
306 | * New command line options |
307 | ||
308 | -data-directory DIR Specify DIR as the "data-directory". | |
309 | This is mostly for testing purposes. | |
310 | ||
a86caf66 DE |
311 | * The "maint set python auto-load on|off" command has been renamed to |
312 | "set auto-load-scripts on|off". | |
313 | ||
99e7ae30 DE |
314 | * GDB has a new command: "set directories". |
315 | It is like the "dir" command except that it replaces the | |
316 | source path list instead of augmenting it. | |
317 | ||
4694da01 TT |
318 | * GDB now understands thread names. |
319 | ||
320 | On GNU/Linux, "info threads" will display the thread name as set by | |
321 | prctl or pthread_setname_np. | |
322 | ||
323 | There is also a new command, "thread name", which can be used to | |
324 | assign a name internally for GDB to display. | |
325 | ||
f4b8a18d KW |
326 | * OpenCL C |
327 | Initial support for the OpenCL C language (http://www.khronos.org/opencl) | |
328 | has been integrated into GDB. | |
329 | ||
585d1eb8 PM |
330 | * Python scripting |
331 | ||
da5d4055 PM |
332 | ** The function gdb.Write now accepts an optional keyword 'stream'. |
333 | This keyword, when provided, will direct the output to either | |
334 | stdout, stderr, or GDB's logging output. | |
335 | ||
9a6f1302 PM |
336 | ** Parameters can now be be sub-classed in Python, and in particular |
337 | you may implement the get_set_doc and get_show_doc functions. | |
338 | This improves how Parameter set/show documentation is processed | |
339 | and allows for more dynamic content. | |
340 | ||
29703da4 PM |
341 | ** Symbols, Symbol Table, Symbol Table and Line, Object Files, |
342 | Inferior, Inferior Thread, Blocks, and Block Iterator APIs now | |
343 | have an is_valid method. | |
344 | ||
350c6c65 PM |
345 | ** Breakpoints can now be sub-classed in Python, and in particular |
346 | you may implement a 'stop' function that is executed each time | |
347 | the inferior reaches that breakpoint. | |
348 | ||
6e6fbe60 DE |
349 | ** New function gdb.lookup_global_symbol looks up a global symbol. |
350 | ||
585d1eb8 PM |
351 | ** GDB values in Python are now callable if the value represents a |
352 | function. For example, if 'some_value' represents a function that | |
353 | takes two integer parameters and returns a value, you can call | |
354 | that function like so: | |
355 | ||
356 | result = some_value (10,20) | |
357 | ||
0e3509db DE |
358 | ** Module gdb.types has been added. |
359 | It contains a collection of utilities for working with gdb.Types objects: | |
360 | get_basic_type, has_field, make_enum_dict. | |
361 | ||
7b51bc51 DE |
362 | ** Module gdb.printing has been added. |
363 | It contains utilities for writing and registering pretty-printers. | |
364 | New classes: PrettyPrinter, SubPrettyPrinter, | |
365 | RegexpCollectionPrettyPrinter. | |
366 | New function: register_pretty_printer. | |
367 | ||
368 | ** New commands "info pretty-printers", "enable pretty-printer" and | |
369 | "disable pretty-printer" have been added. | |
370 | ||
99e7ae30 DE |
371 | ** gdb.parameter("directories") is now available. |
372 | ||
d8e22779 TT |
373 | ** New function gdb.newest_frame returns the newest frame in the |
374 | selected thread. | |
375 | ||
4694da01 TT |
376 | ** The gdb.InferiorThread class has a new "name" attribute. This |
377 | holds the thread's name. | |
378 | ||
505500db SW |
379 | ** Python Support for Inferior events. |
380 | Python scripts can add observers to be notified of events | |
824446ad | 381 | occurring in the process being debugged. |
c17a9e46 HZ |
382 | The following events are currently supported: |
383 | - gdb.events.cont Continue event. | |
384 | - gdb.events.exited Inferior exited event. | |
385 | - gdb.events.stop Signal received, and Breakpoint hit events. | |
386 | ||
def98928 TT |
387 | * C++ Improvements: |
388 | ||
389 | ** GDB now puts template parameters in scope when debugging in an | |
390 | instantiation. For example, if you have: | |
391 | ||
392 | template<int X> int func (void) { return X; } | |
393 | ||
394 | then if you step into func<5>, "print X" will show "5". This | |
395 | feature requires proper debuginfo support from the compiler; it | |
396 | was added to GCC 4.5. | |
397 | ||
66cb8159 TT |
398 | ** The motion commands "next", "finish", "until", and "advance" now |
399 | work better when exceptions are thrown. In particular, GDB will | |
400 | no longer lose control of the inferior; instead, the GDB will | |
401 | stop the inferior at the point at which the exception is caught. | |
402 | This functionality requires a change in the exception handling | |
403 | code that was introduced in GCC 4.5. | |
404 | ||
4aac0db7 UW |
405 | * GDB now follows GCC's rules on accessing volatile objects when |
406 | reading or writing target state during expression evaluation. | |
407 | One notable difference to prior behavior is that "print x = 0" | |
408 | no longer generates a read of x; the value of the assignment is | |
409 | now always taken directly from the value being assigned. | |
410 | ||
283e6a52 TT |
411 | * GDB now has some support for using labels in the program's source in |
412 | linespecs. For instance, you can use "advance label" to continue | |
413 | execution to a label. | |
414 | ||
415 | * GDB now has support for reading and writing a new .gdb_index | |
416 | section. This section holds a fast index of DWARF debugging | |
417 | information and can be used to greatly speed up GDB startup and | |
418 | operation. See the documentation for `save gdb-index' for details. | |
419 | ||
b56df873 | 420 | * The "watch" command now accepts an optional "-location" argument. |
14c0d4e1 | 421 | When used, this causes GDB to watch the memory referred to by the |
b56df873 TT |
422 | expression. Such a watchpoint is never deleted due to it going out |
423 | of scope. | |
424 | ||
ae53ffa4 PA |
425 | * GDB now supports thread debugging of core dumps on GNU/Linux. |
426 | ||
427 | GDB now activates thread debugging using the libthread_db library | |
428 | when debugging GNU/Linux core dumps, similarly to when debugging | |
429 | live processes. As a result, when debugging a core dump file, GDB | |
430 | is now able to display pthread_t ids of threads. For example, "info | |
431 | threads" shows the same output as when debugging the process when it | |
432 | was live. In earlier releases, you'd see something like this: | |
433 | ||
434 | (gdb) info threads | |
435 | * 1 LWP 6780 main () at main.c:10 | |
436 | ||
437 | While now you see this: | |
438 | ||
439 | (gdb) info threads | |
440 | * 1 Thread 0x7f0f5712a700 (LWP 6780) main () at main.c:10 | |
441 | ||
442 | It is also now possible to inspect TLS variables when debugging core | |
443 | dumps. | |
444 | ||
445 | When debugging a core dump generated on a machine other than the one | |
446 | used to run GDB, you may need to point GDB at the correct | |
447 | libthread_db library with the "set libthread-db-search-path" | |
448 | command. See the user manual for more details on this command. | |
449 | ||
f1310107 TJB |
450 | * When natively debugging programs on PowerPC BookE processors running |
451 | a Linux kernel version 2.6.34 or later, GDB supports ranged breakpoints, | |
452 | which stop execution of the inferior whenever it executes an instruction | |
453 | at any address within the specified range. See the "PowerPC Embedded" | |
454 | section in the user manual for more details. | |
455 | ||
248c9dbc JB |
456 | * New features in the GDB remote stub, GDBserver |
457 | ||
1aee7009 JB |
458 | ** GDBserver is now supported on PowerPC LynxOS (versions 4.x and 5.x), |
459 | and i686 LynxOS (version 5.x). | |
248c9dbc | 460 | |
eb826dc6 MF |
461 | ** GDBserver is now supported on Blackfin Linux. |
462 | ||
44603653 JB |
463 | * New native configurations |
464 | ||
465 | ia64 HP-UX ia64-*-hpux* | |
466 | ||
91021223 MF |
467 | * New targets: |
468 | ||
469 | Analog Devices, Inc. Blackfin Processor bfin-* | |
470 | ||
6e1bb179 JB |
471 | * Ada task switching is now supported on sparc-elf targets when |
472 | debugging a program using the Ravenscar Profile. For more information, | |
473 | see the "Tasking Support when using the Ravenscar Profile" section | |
474 | in the GDB user manual. | |
475 | ||
50c97f38 TT |
476 | * Guile support was removed. |
477 | ||
448a92bf MF |
478 | * New features in the GNU simulator |
479 | ||
480 | ** The --map-info flag lists all known core mappings. | |
481 | ||
66ee2731 MF |
482 | ** CFI flashes may be simulated via the "cfi" device. |
483 | ||
76b8507d | 484 | *** Changes in GDB 7.2 |
bfbf3774 | 485 | |
ba25b921 PA |
486 | * Shared library support for remote targets by default |
487 | ||
488 | When GDB is configured for a generic, non-OS specific target, like | |
489 | for example, --target=arm-eabi or one of the many *-*-elf targets, | |
490 | GDB now queries remote stubs for loaded shared libraries using the | |
491 | `qXfer:libraries:read' packet. Previously, shared library support | |
492 | was always disabled for such configurations. | |
493 | ||
4656f5c6 SW |
494 | * C++ Improvements: |
495 | ||
496 | ** Argument Dependent Lookup (ADL) | |
497 | ||
498 | In C++ ADL lookup directs function search to the namespaces of its | |
499 | arguments even if the namespace has not been imported. | |
500 | For example: | |
501 | namespace A | |
502 | { | |
503 | class B { }; | |
504 | void foo (B) { } | |
505 | } | |
506 | ... | |
507 | A::B b | |
508 | foo(b) | |
509 | Here the compiler will search for `foo' in the namespace of 'b' | |
510 | and find A::foo. GDB now supports this. This construct is commonly | |
511 | used in the Standard Template Library for operators. | |
512 | ||
513 | ** Improved User Defined Operator Support | |
514 | ||
515 | In addition to member operators, GDB now supports lookup of operators | |
516 | defined in a namespace and imported with a `using' directive, operators | |
517 | defined in the global scope, operators imported implicitly from an | |
518 | anonymous namespace, and the ADL operators mentioned in the previous | |
519 | entry. | |
520 | GDB now also supports proper overload resolution for all the previously | |
521 | mentioned flavors of operators. | |
522 | ||
254e6b9e DE |
523 | ** static const class members |
524 | ||
525 | Printing of static const class members that are initialized in the | |
526 | class definition has been fixed. | |
527 | ||
711e434b PM |
528 | * Windows Thread Information Block access. |
529 | ||
530 | On Windows targets, GDB now supports displaying the Windows Thread | |
531 | Information Block (TIB) structure. This structure is visible either | |
532 | by using the new command `info w32 thread-information-block' or, by | |
533 | dereferencing the new convenience variable named `$_tlb', a | |
534 | thread-specific pointer to the TIB. This feature is also supported | |
535 | when remote debugging using GDBserver. | |
536 | ||
0fb4aa4b PA |
537 | * Static tracepoints |
538 | ||
539 | Static tracepoints are calls in the user program into a tracing | |
540 | library. One such library is a port of the LTTng kernel tracer to | |
541 | userspace --- UST (LTTng Userspace Tracer, http://lttng.org/ust). | |
542 | When debugging with GDBserver, GDB now supports combining the GDB | |
543 | tracepoint machinery with such libraries. For example: the user can | |
544 | use GDB to probe a static tracepoint marker (a call from the user | |
545 | program into the tracing library) with the new "strace" command (see | |
546 | "New commands" below). This creates a "static tracepoint" in the | |
547 | breakpoint list, that can be manipulated with the same feature set | |
548 | as fast and regular tracepoints. E.g., collect registers, local and | |
549 | global variables, collect trace state variables, and define | |
550 | tracepoint conditions. In addition, the user can collect extra | |
551 | static tracepoint marker specific data, by collecting the new | |
552 | $_sdata internal variable. When analyzing the trace buffer, you can | |
553 | inspect $_sdata like any other variable available to GDB. For more | |
554 | information, see the "Tracepoints" chapter in GDB user manual. New | |
555 | remote packets have been defined to support static tracepoints, see | |
556 | the "New remote packets" section below. | |
557 | ||
ca11e899 SS |
558 | * Better reconstruction of tracepoints after disconnected tracing |
559 | ||
560 | GDB will attempt to download the original source form of tracepoint | |
561 | definitions when starting a trace run, and then will upload these | |
562 | upon reconnection to the target, resulting in a more accurate | |
563 | reconstruction of the tracepoints that are in use on the target. | |
564 | ||
565 | * Observer mode | |
566 | ||
567 | You can now exercise direct control over the ways that GDB can | |
568 | affect your program. For instance, you can disallow the setting of | |
569 | breakpoints, so that the program can run continuously (assuming | |
570 | non-stop mode). In addition, the "observer" variable is available | |
571 | to switch all of the different controls; in observer mode, GDB | |
572 | cannot affect the target's behavior at all, which is useful for | |
573 | tasks like diagnosing live systems in the field. | |
574 | ||
575 | * The new convenience variable $_thread holds the number of the | |
576 | current thread. | |
577 | ||
711e434b PM |
578 | * New remote packets |
579 | ||
580 | qGetTIBAddr | |
581 | ||
582 | Return the address of the Windows Thread Information Block of a given thread. | |
583 | ||
dde08ee1 PA |
584 | qRelocInsn |
585 | ||
586 | In response to several of the tracepoint packets, the target may now | |
587 | also respond with a number of intermediate `qRelocInsn' request | |
588 | packets before the final result packet, to have GDB handle | |
589 | relocating an instruction to execute at a different address. This | |
590 | is particularly useful for stubs that support fast tracepoints. GDB | |
591 | reports support for this feature in the qSupported packet. | |
592 | ||
0fb4aa4b PA |
593 | qTfSTM, qTsSTM |
594 | ||
595 | List static tracepoint markers in the target program. | |
596 | ||
597 | qTSTMat | |
598 | ||
599 | List static tracepoint markers at a given address in the target | |
600 | program. | |
601 | ||
602 | qXfer:statictrace:read | |
603 | ||
604 | Read the static trace data collected (by a `collect $_sdata' | |
605 | tracepoint action). The remote stub reports support for this packet | |
606 | to gdb's qSupported query. | |
607 | ||
ca11e899 SS |
608 | QAllow |
609 | ||
610 | Send the current settings of GDB's permission flags. | |
611 | ||
612 | QTDPsrc | |
613 | ||
614 | Send part of the source (textual) form of a tracepoint definition, | |
615 | which includes location, conditional, and action list. | |
616 | ||
3f7b2faa DE |
617 | * The source command now accepts a -s option to force searching for the |
618 | script in the source search path even if the script name specifies | |
619 | a directory. | |
620 | ||
d337e9f0 PA |
621 | * New features in the GDB remote stub, GDBserver |
622 | ||
0fb4aa4b PA |
623 | - GDBserver now support tracepoints (including fast tracepoints, and |
624 | static tracepoints). The feature is currently supported by the | |
625 | i386-linux and amd64-linux builds. See the "Tracepoints support | |
626 | in gdbserver" section in the manual for more information. | |
627 | ||
628 | GDBserver JIT compiles the tracepoint's conditional agent | |
629 | expression bytecode into native code whenever possible for low | |
630 | overhead dynamic tracepoints conditionals. For such tracepoints, | |
631 | an expression that examines program state is evaluated when the | |
632 | tracepoint is reached, in order to determine whether to capture | |
633 | trace data. If the condition is simple and false, processing the | |
634 | tracepoint finishes very quickly and no data is gathered. | |
635 | ||
636 | GDBserver interfaces with the UST (LTTng Userspace Tracer) library | |
637 | for static tracepoints support. | |
d337e9f0 | 638 | |
c24d0242 PM |
639 | - GDBserver now supports x86_64 Windows 64-bit debugging. |
640 | ||
c8d5aac9 L |
641 | * GDB now sends xmlRegisters= in qSupported packet to indicate that |
642 | it understands register description. | |
643 | ||
7c953934 TT |
644 | * The --batch flag now disables pagination and queries. |
645 | ||
8685c86f L |
646 | * X86 general purpose registers |
647 | ||
648 | GDB now supports reading/writing byte, word and double-word x86 | |
649 | general purpose registers directly. This means you can use, say, | |
650 | $ah or $ax to refer, respectively, to the byte register AH and | |
651 | 16-bit word register AX that are actually portions of the 32-bit | |
652 | register EAX or 64-bit register RAX. | |
653 | ||
95a42b64 | 654 | * The `commands' command now accepts a range of breakpoints to modify. |
86b17b60 PA |
655 | A plain `commands' following a command that creates multiple |
656 | breakpoints affects all the breakpoints set by that command. This | |
657 | applies to breakpoints set by `rbreak', and also applies when a | |
658 | single `break' command creates multiple breakpoints (e.g., | |
659 | breakpoints on overloaded c++ functions). | |
95a42b64 | 660 | |
8bd10a10 CM |
661 | * The `rbreak' command now accepts a filename specification as part of |
662 | its argument, limiting the functions selected by the regex to those | |
663 | in the specified file. | |
664 | ||
ab38a727 PA |
665 | * Support for remote debugging Windows and SymbianOS shared libraries |
666 | from Unix hosts has been improved. Non Windows GDB builds now can | |
667 | understand target reported file names that follow MS-DOS based file | |
668 | system semantics, such as file names that include drive letters and | |
669 | use the backslash character as directory separator. This makes it | |
670 | possible to transparently use the "set sysroot" and "set | |
671 | solib-search-path" on Unix hosts to point as host copies of the | |
672 | target's shared libraries. See the new command "set | |
673 | target-file-system-kind" described below, and the "Commands to | |
674 | specify files" section in the user manual for more information. | |
675 | ||
6149aea9 PA |
676 | * New commands |
677 | ||
f1421989 HZ |
678 | eval template, expressions... |
679 | Convert the values of one or more expressions under the control | |
680 | of the string template to a command line, and call it. | |
681 | ||
ab38a727 PA |
682 | set target-file-system-kind unix|dos-based|auto |
683 | show target-file-system-kind | |
684 | Set or show the assumed file system kind for target reported file | |
685 | names. | |
686 | ||
6149aea9 PA |
687 | save breakpoints <filename> |
688 | Save all current breakpoint definitions to a file suitable for use | |
689 | in a later debugging session. To read the saved breakpoint | |
690 | definitions, use the `source' command. | |
691 | ||
692 | `save tracepoints' is a new alias for `save-tracepoints'. The latter | |
693 | is now deprecated. | |
694 | ||
0fb4aa4b PA |
695 | info static-tracepoint-markers |
696 | Display information about static tracepoint markers in the target. | |
697 | ||
698 | strace FN | FILE:LINE | *ADDR | -m MARKER_ID | |
699 | Define a static tracepoint by probing a marker at the given | |
700 | function, line, address, or marker ID. | |
701 | ||
ca11e899 SS |
702 | set observer on|off |
703 | show observer | |
704 | Enable and disable observer mode. | |
705 | ||
706 | set may-write-registers on|off | |
707 | set may-write-memory on|off | |
708 | set may-insert-breakpoints on|off | |
709 | set may-insert-tracepoints on|off | |
710 | set may-insert-fast-tracepoints on|off | |
711 | set may-interrupt on|off | |
712 | Set individual permissions for GDB effects on the target. Note that | |
713 | some of these settings can have undesirable or surprising | |
714 | consequences, particularly when changed in the middle of a session. | |
715 | For instance, disabling the writing of memory can prevent | |
716 | breakpoints from being inserted, cause single-stepping to fail, or | |
717 | even crash your program, if you disable after breakpoints have been | |
718 | inserted. However, GDB should not crash. | |
719 | ||
720 | set record memory-query on|off | |
721 | show record memory-query | |
722 | Control whether to stop the inferior if memory changes caused | |
723 | by an instruction cannot be recorded. | |
724 | ||
53a71c06 CR |
725 | * Changed commands |
726 | ||
727 | disassemble | |
728 | The disassemble command now supports "start,+length" form of two arguments. | |
729 | ||
f3e9a817 PM |
730 | * Python scripting |
731 | ||
9279c692 JB |
732 | ** GDB now provides a new directory location, called the python directory, |
733 | where Python scripts written for GDB can be installed. The location | |
734 | of that directory is <data-directory>/python, where <data-directory> | |
735 | is the GDB data directory. For more details, see section `Scripting | |
736 | GDB using Python' in the manual. | |
737 | ||
adc36818 | 738 | ** The GDB Python API now has access to breakpoints, symbols, symbol |
595939de PM |
739 | tables, program spaces, inferiors, threads and frame's code blocks. |
740 | Additionally, GDB Parameters can now be created from the API, and | |
741 | manipulated via set/show in the CLI. | |
f870a310 | 742 | |
fa33c3cd | 743 | ** New functions gdb.target_charset, gdb.target_wide_charset, |
07ca107c DE |
744 | gdb.progspaces, gdb.current_progspace, and gdb.string_to_argv. |
745 | ||
746 | ** New exception gdb.GdbError. | |
fa33c3cd DE |
747 | |
748 | ** Pretty-printers are now also looked up in the current program space. | |
f3e9a817 | 749 | |
967cf477 DE |
750 | ** Pretty-printers can now be individually enabled and disabled. |
751 | ||
8a1ea21f DE |
752 | ** GDB now looks for names of Python scripts to auto-load in a |
753 | special section named `.debug_gdb_scripts', in addition to looking | |
754 | for a OBJFILE-gdb.py script when OBJFILE is read by the debugger. | |
755 | ||
a7bdde9e VP |
756 | * Tracepoint actions were unified with breakpoint commands. In particular, |
757 | there are no longer differences in "info break" output for breakpoints and | |
758 | tracepoints and the "commands" command can be used for both tracepoints and | |
759 | regular breakpoints. | |
760 | ||
05071a4d PA |
761 | * New targets |
762 | ||
763 | ARM Symbian arm*-*-symbianelf* | |
764 | ||
6aecb9c2 JB |
765 | * D language support. |
766 | GDB now supports debugging programs written in the D programming | |
767 | language. | |
768 | ||
431e49aa TJB |
769 | * GDB now supports the extended ptrace interface for PowerPC which is |
770 | available since Linux kernel version 2.6.34. This automatically enables | |
771 | any hardware breakpoints and additional hardware watchpoints available in | |
772 | the processor. The old ptrace interface exposes just one hardware | |
773 | watchpoint and no hardware breakpoints. | |
774 | ||
775 | * GDB is now able to use the Data Value Compare (DVC) register available on | |
776 | embedded PowerPC processors to implement in hardware simple watchpoint | |
777 | conditions of the form: | |
778 | ||
779 | watch ADDRESS|VARIABLE if ADDRESS|VARIABLE == CONSTANT EXPRESSION | |
780 | ||
781 | This works in native GDB running on Linux kernels with the extended ptrace | |
782 | interface mentioned above. | |
783 | ||
bfbf3774 | 784 | *** Changes in GDB 7.1 |
abc7453d | 785 | |
4eef138c TT |
786 | * C++ Improvements |
787 | ||
788 | ** Namespace Support | |
71dee663 SW |
789 | |
790 | GDB now supports importing of namespaces in C++. This enables the | |
791 | user to inspect variables from imported namespaces. Support for | |
792 | namepace aliasing has also been added. So, if a namespace is | |
793 | aliased in the current scope (e.g. namepace C=A; ) the user can | |
794 | print variables using the alias (e.g. (gdb) print C::x). | |
795 | ||
4eef138c TT |
796 | ** Bug Fixes |
797 | ||
798 | All known bugs relating to the printing of virtual base class were | |
799 | fixed. It is now possible to call overloaded static methods using a | |
800 | qualified name. | |
801 | ||
802 | ** Cast Operators | |
803 | ||
804 | The C++ cast operators static_cast<>, dynamic_cast<>, const_cast<>, | |
805 | and reinterpret_cast<> are now handled by the C++ expression parser. | |
806 | ||
2d1c1221 ME |
807 | * New targets |
808 | ||
809 | Xilinx MicroBlaze microblaze-*-* | |
34207b9e | 810 | Renesas RX rx-*-elf |
2d1c1221 ME |
811 | |
812 | * New Simulators | |
813 | ||
814 | Xilinx MicroBlaze microblaze | |
34207b9e | 815 | Renesas RX rx |
2d1c1221 | 816 | |
6c95b8df PA |
817 | * Multi-program debugging. |
818 | ||
819 | GDB now has support for multi-program (a.k.a. multi-executable or | |
820 | multi-exec) debugging. This allows for debugging multiple inferiors | |
821 | simultaneously each running a different program under the same GDB | |
822 | session. See "Debugging Multiple Inferiors and Programs" in the | |
823 | manual for more information. This implied some user visible changes | |
824 | in the multi-inferior support. For example, "info inferiors" now | |
825 | lists inferiors that are not running yet or that have exited | |
826 | already. See also "New commands" and "New options" below. | |
827 | ||
d5551862 SS |
828 | * New tracing features |
829 | ||
830 | GDB's tracepoint facility now includes several new features: | |
831 | ||
832 | ** Trace state variables | |
f61e138d SS |
833 | |
834 | GDB tracepoints now include support for trace state variables, which | |
835 | are variables managed by the target agent during a tracing | |
836 | experiment. They are useful for tracepoints that trigger each | |
837 | other, so for instance one tracepoint can count hits in a variable, | |
838 | and then a second tracepoint has a condition that is true when the | |
839 | count reaches a particular value. Trace state variables share the | |
840 | $-syntax of GDB convenience variables, and can appear in both | |
841 | tracepoint actions and condition expressions. Use the "tvariable" | |
842 | command to create, and "info tvariables" to view; see "Trace State | |
843 | Variables" in the manual for more detail. | |
7a697b8d | 844 | |
d5551862 | 845 | ** Fast tracepoints |
7a697b8d SS |
846 | |
847 | GDB now includes an option for defining fast tracepoints, which | |
848 | targets may implement more efficiently, such as by installing a jump | |
849 | into the target agent rather than a trap instruction. The resulting | |
850 | speedup can be by two orders of magnitude or more, although the | |
851 | tradeoff is that some program locations on some target architectures | |
852 | might not allow fast tracepoint installation, for instance if the | |
853 | instruction to be replaced is shorter than the jump. To request a | |
854 | fast tracepoint, use the "ftrace" command, with syntax identical to | |
855 | the regular trace command. | |
856 | ||
d5551862 SS |
857 | ** Disconnected tracing |
858 | ||
859 | It is now possible to detach GDB from the target while it is running | |
860 | a trace experiment, then reconnect later to see how the experiment | |
861 | is going. In addition, a new variable disconnected-tracing lets you | |
862 | tell the target agent whether to continue running a trace if the | |
863 | connection is lost unexpectedly. | |
864 | ||
00bf0b85 SS |
865 | ** Trace files |
866 | ||
867 | GDB now has the ability to save the trace buffer into a file, and | |
868 | then use that file as a target, similarly to you can do with | |
869 | corefiles. You can select trace frames, print data that was | |
870 | collected in them, and use tstatus to display the state of the | |
871 | tracing run at the moment that it was saved. To create a trace | |
872 | file, use "tsave <filename>", and to use it, do "target tfile | |
873 | <name>". | |
4daf5ac0 SS |
874 | |
875 | ** Circular trace buffer | |
876 | ||
877 | You can ask the target agent to handle the trace buffer as a | |
878 | circular buffer, discarding the oldest trace frames to make room for | |
879 | newer ones, by setting circular-trace-buffer to on. This feature may | |
880 | not be available for all target agents. | |
881 | ||
21a0512e PP |
882 | * Changed commands |
883 | ||
884 | disassemble | |
885 | The disassemble command, when invoked with two arguments, now requires | |
886 | the arguments to be comma-separated. | |
887 | ||
0fe7935b DJ |
888 | info variables |
889 | The info variables command now displays variable definitions. Files | |
890 | which only declare a variable are not shown. | |
891 | ||
fb2e7cb4 JB |
892 | source |
893 | The source command is now capable of sourcing Python scripts. | |
894 | This feature is dependent on the debugger being build with Python | |
895 | support. | |
896 | ||
897 | Related to this enhancement is also the introduction of a new command | |
898 | "set script-extension" (see below). | |
899 | ||
6c95b8df PA |
900 | * New commands (for set/show, see "New options" below) |
901 | ||
399cd161 MS |
902 | record save [<FILENAME>] |
903 | Save a file (in core file format) containing the process record | |
904 | execution log for replay debugging at a later time. | |
905 | ||
906 | record restore <FILENAME> | |
907 | Restore the process record execution log that was saved at an | |
908 | earlier time, for replay debugging. | |
909 | ||
6c95b8df PA |
910 | add-inferior [-copies <N>] [-exec <FILENAME>] |
911 | Add a new inferior. | |
912 | ||
913 | clone-inferior [-copies <N>] [ID] | |
914 | Make a new inferior ready to execute the same program another | |
915 | inferior has loaded. | |
916 | ||
917 | remove-inferior ID | |
918 | Remove an inferior. | |
919 | ||
920 | maint info program-spaces | |
921 | List the program spaces loaded into GDB. | |
922 | ||
9a7071a8 JB |
923 | set remote interrupt-sequence [Ctrl-C | BREAK | BREAK-g] |
924 | show remote interrupt-sequence | |
925 | Allow the user to select one of ^C, a BREAK signal or BREAK-g | |
926 | as the sequence to the remote target in order to interrupt the execution. | |
927 | Ctrl-C is a default. Some system prefers BREAK which is high level of | |
928 | serial line for some certain time. Linux kernel prefers BREAK-g, a.k.a | |
929 | Magic SysRq g. It is BREAK signal and character 'g'. | |
930 | ||
931 | set remote interrupt-on-connect [on | off] | |
932 | show remote interrupt-on-connect | |
933 | When interrupt-on-connect is ON, gdb sends interrupt-sequence to | |
934 | remote target when gdb connects to it. This is needed when you debug | |
935 | Linux kernel. | |
936 | ||
937 | set remotebreak [on | off] | |
938 | show remotebreak | |
939 | Deprecated. Use "set/show remote interrupt-sequence" instead. | |
940 | ||
f61e138d SS |
941 | tvariable $NAME [ = EXP ] |
942 | Create or modify a trace state variable. | |
943 | ||
944 | info tvariables | |
945 | List trace state variables and their values. | |
946 | ||
947 | delete tvariable $NAME ... | |
948 | Delete one or more trace state variables. | |
949 | ||
6da95a67 SS |
950 | teval EXPR, ... |
951 | Evaluate the given expressions without collecting anything into the | |
952 | trace buffer. (Valid in tracepoint actions only.) | |
953 | ||
7a697b8d SS |
954 | ftrace FN / FILE:LINE / *ADDR |
955 | Define a fast tracepoint at the given function, line, or address. | |
956 | ||
b0f02ee9 JK |
957 | * New expression syntax |
958 | ||
959 | GDB now parses the 0b prefix of binary numbers the same way as GCC does. | |
960 | GDB now parses 0b101010 identically with 42. | |
961 | ||
6c95b8df PA |
962 | * New options |
963 | ||
964 | set follow-exec-mode new|same | |
965 | show follow-exec-mode | |
966 | Control whether GDB reuses the same inferior across an exec call or | |
967 | creates a new one. This is useful to be able to restart the old | |
968 | executable after the inferior having done an exec call. | |
969 | ||
236f1d4d SS |
970 | set default-collect EXPR, ... |
971 | show default-collect | |
972 | Define a list of expressions to be collected at each tracepoint. | |
973 | This is a useful way to ensure essential items are not overlooked, | |
974 | such as registers or a critical global variable. | |
975 | ||
d5551862 SS |
976 | set disconnected-tracing |
977 | show disconnected-tracing | |
978 | If set to 1, the target is instructed to continue tracing if it | |
979 | loses its connection to GDB. If 0, the target is to stop tracing | |
980 | upon disconnection. | |
981 | ||
4daf5ac0 SS |
982 | set circular-trace-buffer |
983 | show circular-trace-buffer | |
984 | If set to on, the target is instructed to use a circular trace buffer | |
985 | and discard the oldest trace frames instead of stopping the trace due | |
986 | to a full trace buffer. If set to off, the trace stops when the buffer | |
987 | fills up. Some targets may not support this. | |
988 | ||
fb2e7cb4 JB |
989 | set script-extension off|soft|strict |
990 | show script-extension | |
991 | If set to "off", the debugger does not perform any script language | |
992 | recognition, and all sourced files are assumed to be GDB scripts. | |
993 | If set to "soft" (the default), files are sourced according to | |
994 | filename extension, falling back to GDB scripts if the first | |
995 | evaluation failed. | |
996 | If set to "strict", files are sourced according to filename extension. | |
997 | ||
2b71fc8e JB |
998 | set ada trust-PAD-over-XVS on|off |
999 | show ada trust-PAD-over-XVS | |
1000 | If off, activate a workaround against a bug in the debugging information | |
1001 | generated by the compiler for PAD types (see gcc/exp_dbug.ads in | |
1002 | the GCC sources for more information about the GNAT encoding and | |
1003 | PAD types in particular). It is always safe to set this option to | |
1004 | off, but this introduces a slight performance penalty. The default | |
1005 | is on. | |
1006 | ||
de2e5182 TT |
1007 | * Python API Improvements |
1008 | ||
1009 | ** GDB provides the new class gdb.LazyString. This is useful in | |
1010 | some pretty-printing cases. The new method gdb.Value.lazy_string | |
1011 | provides a simple way to create objects of this type. | |
1012 | ||
1013 | ** The fields returned by gdb.Type.fields now have an | |
1014 | `is_base_class' attribute. | |
1015 | ||
1016 | ** The new method gdb.Type.range returns the range of an array type. | |
1017 | ||
1018 | ** The new method gdb.parse_and_eval can be used to parse and | |
1019 | evaluate an expression. | |
1020 | ||
f61e138d SS |
1021 | * New remote packets |
1022 | ||
1023 | QTDV | |
1024 | Define a trace state variable. | |
1025 | ||
1026 | qTV | |
1027 | Get the current value of a trace state variable. | |
1028 | ||
d5551862 SS |
1029 | QTDisconnected |
1030 | Set desired tracing behavior upon disconnection. | |
1031 | ||
4daf5ac0 SS |
1032 | QTBuffer:circular |
1033 | Set the trace buffer to be linear or circular. | |
1034 | ||
d5551862 SS |
1035 | qTfP, qTsP |
1036 | Get data about the tracepoints currently in use. | |
1037 | ||
2d483d34 MS |
1038 | * Bug fixes |
1039 | ||
1040 | Process record now works correctly with hardware watchpoints. | |
1041 | ||
6e0e5977 JB |
1042 | Multiple bug fixes have been made to the mips-irix port, making it |
1043 | much more reliable. In particular: | |
1044 | - Debugging threaded applications is now possible again. Previously, | |
1045 | GDB would hang while starting the program, or while waiting for | |
1046 | the program to stop at a breakpoint. | |
1047 | - Attaching to a running process no longer hangs. | |
1048 | - An error occurring while loading a core file has been fixed. | |
1049 | - Changing the value of the PC register now works again. This fixes | |
1050 | problems observed when using the "jump" command, or when calling | |
1051 | a function from GDB, or even when assigning a new value to $pc. | |
1052 | - With the "finish" and "return" commands, the return value for functions | |
1053 | returning a small array is now correctly printed. | |
1054 | - It is now possible to break on shared library code which gets executed | |
1055 | during a shared library init phase (code executed while executing | |
1056 | their .init section). Previously, the breakpoint would have no effect. | |
1057 | - GDB is now able to backtrace through the signal handler for | |
1058 | non-threaded programs. | |
1059 | ||
93c26624 JK |
1060 | PIE (Position Independent Executable) programs debugging is now supported. |
1061 | This includes debugging execution of PIC (Position Independent Code) shared | |
1062 | libraries although for that, it should be possible to run such libraries as an | |
1063 | executable program. | |
1064 | ||
abc7453d | 1065 | *** Changes in GDB 7.0 |
75feb17d | 1066 | |
4efc6507 DE |
1067 | * GDB now has an interface for JIT compilation. Applications that |
1068 | dynamically generate code can create symbol files in memory and register | |
1069 | them with GDB. For users, the feature should work transparently, and | |
1070 | for JIT developers, the interface is documented in the GDB manual in the | |
1071 | "JIT Compilation Interface" chapter. | |
1072 | ||
782b2b07 SS |
1073 | * Tracepoints may now be conditional. The syntax is as for |
1074 | breakpoints; either an "if" clause appended to the "trace" command, | |
1075 | or the "condition" command is available. GDB sends the condition to | |
1076 | the target for evaluation using the same bytecode format as is used | |
1077 | for tracepoint actions. | |
1078 | ||
53a71c06 CR |
1079 | * The disassemble command now supports: an optional /r modifier, print the |
1080 | raw instructions in hex as well as in symbolic form, and an optional /m | |
1081 | modifier to print mixed source+assembly. | |
e6158f16 | 1082 | |
e7a8dbfb HZ |
1083 | * Process record and replay |
1084 | ||
1085 | In a architecture environment that supports ``process record and | |
1086 | replay'', ``process record and replay'' target can record a log of | |
1087 | the process execution, and replay it with both forward and reverse | |
1088 | execute commands. | |
1089 | ||
64644d9b MS |
1090 | * Reverse debugging: GDB now has new commands reverse-continue, reverse- |
1091 | step, reverse-next, reverse-finish, reverse-stepi, reverse-nexti, and | |
1092 | set execution-direction {forward|reverse}, for targets that support | |
1093 | reverse execution. | |
1094 | ||
b9412953 DD |
1095 | * GDB now supports hardware watchpoints on MIPS/Linux systems. This |
1096 | feature is available with a native GDB running on kernel version | |
1097 | 2.6.28 or later. | |
1098 | ||
6c7a06a3 TT |
1099 | * GDB now has support for multi-byte and wide character sets on the |
1100 | target. Strings whose character type is wchar_t, char16_t, or | |
1101 | char32_t are now correctly printed. GDB supports wide- and unicode- | |
1102 | literals in C, that is, L'x', L"string", u'x', u"string", U'x', and | |
1103 | U"string" syntax. And, GDB allows the "%ls" and "%lc" formats in | |
1104 | `printf'. This feature requires iconv to work properly; if your | |
1105 | system does not have a working iconv, GDB can use GNU libiconv. See | |
1106 | the installation instructions for more information. | |
1107 | ||
f1838a98 UW |
1108 | * GDB now supports automatic retrieval of shared library files from |
1109 | remote targets. To use this feature, specify a system root that begins | |
1110 | with the `remote:' prefix, either via the `set sysroot' command or via | |
1111 | the `--with-sysroot' configure-time option. | |
1112 | ||
55333a84 DE |
1113 | * "info sharedlibrary" now takes an optional regex of libraries to show, |
1114 | and it now reports if a shared library has no debugging information. | |
1115 | ||
7f6a6314 PM |
1116 | * Commands `set debug-file-directory', `set solib-search-path' and `set args' |
1117 | now complete on file names. | |
1118 | ||
65d12d83 TT |
1119 | * When completing in expressions, gdb will attempt to limit |
1120 | completions to allowable structure or union fields, where appropriate. | |
1121 | For instance, consider: | |
1122 | ||
1123 | # struct example { int f1; double f2; }; | |
1124 | # struct example variable; | |
1125 | (gdb) p variable. | |
1126 | ||
1127 | If the user types TAB at the end of this command line, the available | |
1128 | completions will be "f1" and "f2". | |
1129 | ||
edb3359d DJ |
1130 | * Inlined functions are now supported. They show up in backtraces, and |
1131 | the "step", "next", and "finish" commands handle them automatically. | |
1132 | ||
2fae03e8 TT |
1133 | * GDB now supports the token-splicing (##) and stringification (#) |
1134 | operators when expanding macros. It also supports variable-arity | |
1135 | macros. | |
1136 | ||
47a3467a | 1137 | * GDB now supports inspecting extra signal information, exported by |
58d6951d DJ |
1138 | the new $_siginfo convenience variable. The feature is currently |
1139 | implemented on linux ARM, i386 and amd64. | |
1140 | ||
1141 | * GDB can now display the VFP floating point registers and NEON vector | |
1142 | registers on ARM targets. Both ARM GNU/Linux native GDB and gdbserver | |
1143 | can provide these registers (requires Linux 2.6.30 or later). Remote | |
1144 | and simulator targets may also provide them. | |
47a3467a | 1145 | |
08388c79 DE |
1146 | * New remote packets |
1147 | ||
1148 | qSearch:memory: | |
1149 | Search memory for a sequence of bytes. | |
1150 | ||
a6f3e723 SL |
1151 | QStartNoAckMode |
1152 | Turn off `+'/`-' protocol acknowledgments to permit more efficient | |
1153 | operation over reliable transport links. Use of this packet is | |
1154 | controlled by the `set remote noack-packet' command. | |
1155 | ||
d7713ae0 EZ |
1156 | vKill |
1157 | Kill the process with the specified process ID. Use this in preference | |
1158 | to `k' when multiprocess protocol extensions are supported. | |
1159 | ||
07e059b5 VP |
1160 | qXfer:osdata:read |
1161 | Obtains additional operating system information | |
1162 | ||
47a3467a PA |
1163 | qXfer:siginfo:read |
1164 | qXfer:siginfo:write | |
1165 | Read or write additional signal information. | |
1166 | ||
060871df PA |
1167 | * Removed remote protocol undocumented extension |
1168 | ||
1169 | An undocumented extension to the remote protocol's `S' stop reply | |
1170 | packet that permited the stub to pass a process id was removed. | |
1171 | Remote servers should use the `T' stop reply packet instead. | |
1172 | ||
c055b101 | 1173 | * GDB now supports multiple function calling conventions according to the |
a0ef4274 | 1174 | DWARF-2 DW_AT_calling_convention function attribute. |
c055b101 CV |
1175 | |
1176 | * The SH target utilizes the aforementioned change to distinguish between gcc | |
a0ef4274 DJ |
1177 | and Renesas calling convention. It also adds the new CLI commands |
1178 | `set/show sh calling-convention'. | |
c055b101 | 1179 | |
31fffb02 CS |
1180 | * GDB can now read compressed debug sections, as produced by GNU gold |
1181 | with the --compress-debug-sections=zlib flag. | |
1182 | ||
88d8a8e0 JB |
1183 | * 64-bit core files are now supported on AIX. |
1184 | ||
7f99b190 JB |
1185 | * Thread switching is now supported on Tru64. |
1186 | ||
ccd213ac DJ |
1187 | * Watchpoints can now be set on unreadable memory locations, e.g. addresses |
1188 | which will be allocated using malloc later in program execution. | |
1189 | ||
1fddbabb | 1190 | * The qXfer:libraries:read remote procotol packet now allows passing a |
31fffb02 | 1191 | list of section offsets. |
1fddbabb | 1192 | |
a0ef4274 DJ |
1193 | * On GNU/Linux, GDB can now attach to stopped processes. Several race |
1194 | conditions handling signals delivered during attach or thread creation | |
1195 | have also been fixed. | |
1196 | ||
bfb8797a | 1197 | * GDB now supports the use of DWARF boolean types for Ada's type Boolean. |
158c7665 PH |
1198 | From the user's standpoint, all unqualified instances of True and False |
1199 | are treated as the standard definitions, regardless of context. | |
bfb8797a | 1200 | |
71c25dea TT |
1201 | * GDB now parses C++ symbol and type names more flexibly. For |
1202 | example, given: | |
1203 | ||
1204 | template<typename T> class C { }; | |
1205 | C<char const *> c; | |
1206 | ||
1207 | GDB will now correctly handle all of: | |
1208 | ||
1209 | ptype C<char const *> | |
1210 | ptype C<char const*> | |
1211 | ptype C<const char *> | |
1212 | ptype C<const char*> | |
1213 | ||
ccd213ac DJ |
1214 | * New features in the GDB remote stub, gdbserver |
1215 | ||
1216 | - The "--wrapper" command-line argument tells gdbserver to use a | |
1217 | wrapper program to launch programs for debugging. | |
1218 | ||
7ae0e2a2 UW |
1219 | - On PowerPC and S/390 targets, it is now possible to use a single |
1220 | gdbserver executable to debug both 32-bit and 64-bit programs. | |
1221 | (This requires gdbserver itself to be built as a 64-bit executable.) | |
1222 | ||
a6f3e723 SL |
1223 | - gdbserver uses the new noack protocol mode for TCP connections to |
1224 | reduce communications latency, if also supported and enabled in GDB. | |
1225 | ||
da8bd9a3 DJ |
1226 | - Support for the sparc64-linux-gnu target is now included in |
1227 | gdbserver. | |
1228 | ||
d70e31dd DE |
1229 | - The amd64-linux build of gdbserver now supports debugging both |
1230 | 32-bit and 64-bit programs. | |
1231 | ||
1232 | - The i386-linux, amd64-linux, and i386-win32 builds of gdbserver | |
1233 | now support hardware watchpoints, and will use them automatically | |
1234 | as appropriate. | |
1235 | ||
d57a3c85 TJB |
1236 | * Python scripting |
1237 | ||
1238 | GDB now has support for scripting using Python. Whether this is | |
1239 | available is determined at configure time. | |
1240 | ||
d8906c6f TJB |
1241 | New GDB commands can now be written in Python. |
1242 | ||
aadc346a JB |
1243 | * Ada tasking support |
1244 | ||
1245 | Ada tasks can now be inspected in GDB. The following commands have | |
1246 | been introduced: | |
1247 | ||
1248 | info tasks | |
1249 | Print the list of Ada tasks. | |
1250 | info task N | |
1251 | Print detailed information about task number N. | |
1252 | task | |
1253 | Print the task number of the current task. | |
1254 | task N | |
1255 | Switch the context of debugging to task number N. | |
1256 | ||
adb483fe DJ |
1257 | * Support for user-defined prefixed commands. The "define" command can |
1258 | add new commands to existing prefixes, e.g. "target". | |
1259 | ||
2277426b PA |
1260 | * Multi-inferior, multi-process debugging. |
1261 | ||
1262 | GDB now has generalized support for multi-inferior debugging. See | |
1263 | "Debugging Multiple Inferiors" in the manual for more information. | |
1264 | Although availability still depends on target support, the command | |
1265 | set is more uniform now. The GNU/Linux specific multi-forks support | |
1266 | has been migrated to this new framework. This implied some user | |
1267 | visible changes; see "New commands" and also "Removed commands" | |
1268 | below. | |
1269 | ||
08d16641 PA |
1270 | * Target descriptions can now describe the target OS ABI. See the |
1271 | "Target Description Format" section in the user manual for more | |
1272 | information. | |
1273 | ||
e35359c5 UW |
1274 | * Target descriptions can now describe "compatible" architectures |
1275 | to indicate that the target can execute applications for a different | |
1276 | architecture in addition to those for the main target architecture. | |
1277 | See the "Target Description Format" section in the user manual for | |
1278 | more information. | |
1279 | ||
85e747d2 UW |
1280 | * Multi-architecture debugging. |
1281 | ||
1282 | GDB now includes general supports for debugging applications on | |
1283 | hybrid systems that use more than one single processor architecture | |
1284 | at the same time. Each such hybrid architecture still requires | |
1285 | specific support to be added. The only hybrid architecture supported | |
1286 | in this version of GDB is the Cell Broadband Engine. | |
1287 | ||
1288 | * GDB now supports integrated debugging of Cell/B.E. applications that | |
1289 | use both the PPU and SPU architectures. To enable support for hybrid | |
1290 | Cell/B.E. debugging, you need to configure GDB to support both the | |
1291 | powerpc-linux or powerpc64-linux and the spu-elf targets, using the | |
1292 | --enable-targets configure option. | |
1293 | ||
11ade57a PA |
1294 | * Non-stop mode debugging. |
1295 | ||
1296 | For some targets, GDB now supports an optional mode of operation in | |
1297 | which you can examine stopped threads while other threads continue | |
1298 | to execute freely. This is referred to as non-stop mode, with the | |
1299 | old mode referred to as all-stop mode. See the "Non-Stop Mode" | |
1300 | section in the user manual for more information. | |
1301 | ||
1302 | To be able to support remote non-stop debugging, a remote stub needs | |
1303 | to implement the non-stop mode remote protocol extensions, as | |
1304 | described in the "Remote Non-Stop" section of the user manual. The | |
1305 | GDB remote stub, gdbserver, has been adjusted to support these | |
1306 | extensions on linux targets. | |
1307 | ||
d7713ae0 | 1308 | * New commands (for set/show, see "New options" below) |
75feb17d | 1309 | |
a96d9b2e SDJ |
1310 | catch syscall [NAME(S) | NUMBER(S)] |
1311 | Catch system calls. Arguments, which should be names of system | |
1312 | calls or their numbers, mean catch only those syscalls. Without | |
1313 | arguments, every syscall will be caught. When the inferior issues | |
1314 | any of the specified syscalls, GDB will stop and announce the system | |
1315 | call, both when it is called and when its call returns. This | |
1316 | feature is currently available with a native GDB running on the | |
1317 | Linux Kernel, under the following architectures: x86, x86_64, | |
1318 | PowerPC and PowerPC64. | |
1319 | ||
08388c79 DE |
1320 | find [/size-char] [/max-count] start-address, end-address|+search-space-size, |
1321 | val1 [, val2, ...] | |
1322 | Search memory for a sequence of bytes. | |
1323 | ||
d57a3c85 TJB |
1324 | maint set python print-stack |
1325 | maint show python print-stack | |
1326 | Show a stack trace when an error is encountered in a Python script. | |
1327 | ||
1328 | python [CODE] | |
1329 | Invoke CODE by passing it to the Python interpreter. | |
1330 | ||
d7713ae0 EZ |
1331 | macro define |
1332 | macro list | |
1333 | macro undef | |
1334 | These allow macros to be defined, undefined, and listed | |
1335 | interactively. | |
1336 | ||
1337 | info os processes | |
1338 | Show operating system information about processes. | |
1339 | ||
2277426b PA |
1340 | info inferiors |
1341 | List the inferiors currently under GDB's control. | |
1342 | ||
1343 | inferior NUM | |
1344 | Switch focus to inferior number NUM. | |
1345 | ||
1346 | detach inferior NUM | |
1347 | Detach from inferior number NUM. | |
1348 | ||
1349 | kill inferior NUM | |
1350 | Kill inferior number NUM. | |
1351 | ||
d7713ae0 EZ |
1352 | * New options |
1353 | ||
3285f3fe UW |
1354 | set spu stop-on-load |
1355 | show spu stop-on-load | |
1356 | Control whether to stop for new SPE threads during Cell/B.E. debugging. | |
1357 | ||
ff1a52c6 UW |
1358 | set spu auto-flush-cache |
1359 | show spu auto-flush-cache | |
1360 | Control whether to automatically flush the software-managed cache | |
1361 | during Cell/B.E. debugging. | |
1362 | ||
d7713ae0 EZ |
1363 | set sh calling-convention |
1364 | show sh calling-convention | |
1365 | Control the calling convention used when calling SH target functions. | |
1366 | ||
e0a3ce09 | 1367 | set debug timestamp |
75feb17d | 1368 | show debug timestamp |
d7713ae0 EZ |
1369 | Control display of timestamps with GDB debugging output. |
1370 | ||
1371 | set disassemble-next-line | |
1372 | show disassemble-next-line | |
1373 | Control display of disassembled source lines or instructions when | |
1374 | the debuggee stops. | |
1375 | ||
1376 | set remote noack-packet | |
1377 | show remote noack-packet | |
1378 | Set/show the use of remote protocol QStartNoAckMode packet. See above | |
1379 | under "New remote packets." | |
1380 | ||
1381 | set remote query-attached-packet | |
1382 | show remote query-attached-packet | |
1383 | Control use of remote protocol `qAttached' (query-attached) packet. | |
1384 | ||
1385 | set remote read-siginfo-object | |
1386 | show remote read-siginfo-object | |
1387 | Control use of remote protocol `qXfer:siginfo:read' (read-siginfo-object) | |
1388 | packet. | |
1389 | ||
1390 | set remote write-siginfo-object | |
1391 | show remote write-siginfo-object | |
1392 | Control use of remote protocol `qXfer:siginfo:write' (write-siginfo-object) | |
1393 | packet. | |
1394 | ||
40ab02ce MS |
1395 | set remote reverse-continue |
1396 | show remote reverse-continue | |
1397 | Control use of remote protocol 'bc' (reverse-continue) packet. | |
1398 | ||
1399 | set remote reverse-step | |
1400 | show remote reverse-step | |
1401 | Control use of remote protocol 'bs' (reverse-step) packet. | |
1402 | ||
d7713ae0 EZ |
1403 | set displaced-stepping |
1404 | show displaced-stepping | |
1405 | Control displaced stepping mode. Displaced stepping is a way to | |
1406 | single-step over breakpoints without removing them from the debuggee. | |
1407 | Also known as "out-of-line single-stepping". | |
1408 | ||
1409 | set debug displaced | |
1410 | show debug displaced | |
1411 | Control display of debugging info for displaced stepping. | |
1412 | ||
1413 | maint set internal-error | |
1414 | maint show internal-error | |
1415 | Control what GDB does when an internal error is detected. | |
1416 | ||
1417 | maint set internal-warning | |
1418 | maint show internal-warning | |
1419 | Control what GDB does when an internal warning is detected. | |
75feb17d | 1420 | |
ccd213ac DJ |
1421 | set exec-wrapper |
1422 | show exec-wrapper | |
1423 | unset exec-wrapper | |
1424 | Use a wrapper program to launch programs for debugging. | |
fa4727a6 | 1425 | |
aad4b048 JB |
1426 | set multiple-symbols (all|ask|cancel) |
1427 | show multiple-symbols | |
1428 | The value of this variable can be changed to adjust the debugger behavior | |
1429 | when an expression or a breakpoint location contains an ambiguous symbol | |
1430 | name (an overloaded function name, for instance). | |
1431 | ||
74960c60 VP |
1432 | set breakpoint always-inserted |
1433 | show breakpoint always-inserted | |
1434 | Keep breakpoints always inserted in the target, as opposed to inserting | |
1435 | them when resuming the target, and removing them when the target stops. | |
1436 | This option can improve debugger performance on slow remote targets. | |
1437 | ||
0428b8f5 DJ |
1438 | set arm fallback-mode (arm|thumb|auto) |
1439 | show arm fallback-mode | |
1440 | set arm force-mode (arm|thumb|auto) | |
1441 | show arm force-mode | |
1442 | These commands control how ARM GDB determines whether instructions | |
1443 | are ARM or Thumb. The default for both settings is auto, which uses | |
1444 | the current CPSR value for instructions without symbols; previous | |
1445 | versions of GDB behaved as if "set arm fallback-mode arm". | |
1446 | ||
10568435 JK |
1447 | set disable-randomization |
1448 | show disable-randomization | |
1449 | Standalone programs run with the virtual address space randomization enabled | |
1450 | by default on some platforms. This option keeps the addresses stable across | |
1451 | multiple debugging sessions. | |
1452 | ||
d7713ae0 EZ |
1453 | set non-stop |
1454 | show non-stop | |
1455 | Control whether other threads are stopped or not when some thread hits | |
1456 | a breakpoint. | |
1457 | ||
b3eb342c | 1458 | set target-async |
d7713ae0 | 1459 | show target-async |
b3eb342c VP |
1460 | Requests that asynchronous execution is enabled in the target, if available. |
1461 | In this case, it's possible to resume target in the background, and interact | |
1462 | with GDB while the target is running. "show target-async" displays the | |
1463 | current state of asynchronous execution of the target. | |
1464 | ||
6c7a06a3 TT |
1465 | set target-wide-charset |
1466 | show target-wide-charset | |
1467 | The target-wide-charset is the name of the character set that GDB | |
1468 | uses when printing characters whose type is wchar_t. | |
1469 | ||
84603566 SL |
1470 | set tcp auto-retry (on|off) |
1471 | show tcp auto-retry | |
1472 | set tcp connect-timeout | |
1473 | show tcp connect-timeout | |
1474 | These commands allow GDB to retry failed TCP connections to a remote stub | |
1475 | with a specified timeout period; this is useful if the stub is launched | |
1476 | in parallel with GDB but may not be ready to accept connections immediately. | |
1477 | ||
17a37d48 PP |
1478 | set libthread-db-search-path |
1479 | show libthread-db-search-path | |
1480 | Control list of directories which GDB will search for appropriate | |
1481 | libthread_db. | |
1482 | ||
d4db2f36 PA |
1483 | set schedule-multiple (on|off) |
1484 | show schedule-multiple | |
1485 | Allow GDB to resume all threads of all processes or only threads of | |
1486 | the current process. | |
1487 | ||
4e5d721f DE |
1488 | set stack-cache |
1489 | show stack-cache | |
1490 | Use more aggressive caching for accesses to the stack. This improves | |
1491 | performance of remote debugging (particularly backtraces) without | |
1492 | affecting correctness. | |
1493 | ||
910c5da8 JB |
1494 | set interactive-mode (on|off|auto) |
1495 | show interactive-mode | |
1496 | Control whether GDB runs in interactive mode (on) or not (off). | |
1497 | When in interactive mode, GDB waits for the user to answer all | |
1498 | queries. Otherwise, GDB does not wait and assumes the default | |
1499 | answer. When set to auto (the default), GDB determines which | |
1500 | mode to use based on the stdin settings. | |
1501 | ||
2277426b PA |
1502 | * Removed commands |
1503 | ||
1504 | info forks | |
1505 | For program forks, this is replaced by the new more generic `info | |
1506 | inferiors' command. To list checkpoints, you can still use the | |
1507 | `info checkpoints' command, which was an alias for the `info forks' | |
1508 | command. | |
1509 | ||
1510 | fork NUM | |
1511 | Replaced by the new `inferior' command. To switch between | |
1512 | checkpoints, you can still use the `restart' command, which was an | |
1513 | alias for the `fork' command. | |
1514 | ||
1515 | process PID | |
1516 | This is removed, since some targets don't have a notion of | |
1517 | processes. To switch between processes, you can still use the | |
1518 | `inferior' command using GDB's own inferior number. | |
1519 | ||
1520 | delete fork NUM | |
1521 | For program forks, this is replaced by the new more generic `kill | |
1522 | inferior' command. To delete a checkpoint, you can still use the | |
1523 | `delete checkpoint' command, which was an alias for the `delete | |
1524 | fork' command. | |
1525 | ||
1526 | detach fork NUM | |
1527 | For program forks, this is replaced by the new more generic `detach | |
1528 | inferior' command. To detach a checkpoint, you can still use the | |
1529 | `detach checkpoint' command, which was an alias for the `detach | |
1530 | fork' command. | |
1531 | ||
a80b95ba TG |
1532 | * New native configurations |
1533 | ||
1534 | x86/x86_64 Darwin i[34567]86-*-darwin* | |
1535 | ||
b8bfd3ed JB |
1536 | x86_64 MinGW x86_64-*-mingw* |
1537 | ||
75a2d5e7 TT |
1538 | * New targets |
1539 | ||
c28c63d8 | 1540 | Lattice Mico32 lm32-* |
75a2d5e7 | 1541 | x86 DICOS i[34567]86-*-dicos* |
4c1d2973 | 1542 | x86_64 DICOS x86_64-*-dicos* |
5f814c3b | 1543 | S+core 3 score-*-* |
75a2d5e7 | 1544 | |
6de3146c PA |
1545 | * The GDB remote stub, gdbserver, now supports x86 Windows CE |
1546 | (mingw32ce) debugging. | |
1547 | ||
d5cbbe6e JB |
1548 | * Removed commands |
1549 | ||
1550 | catch load | |
1551 | catch unload | |
1552 | These commands were actually not implemented on any target. | |
1553 | ||
75feb17d | 1554 | *** Changes in GDB 6.8 |
f9ed52be | 1555 | |
af5ca30d NH |
1556 | * New native configurations |
1557 | ||
1558 | NetBSD/hppa hppa*-*netbsd* | |
94a0e877 | 1559 | Xtensa GNU/Linux xtensa*-*-linux* |
af5ca30d NH |
1560 | |
1561 | * New targets | |
1562 | ||
1563 | NetBSD/hppa hppa*-*-netbsd* | |
94a0e877 | 1564 | Xtensa GNU/Lunux xtensa*-*-linux* |
af5ca30d | 1565 | |
7a404eba PA |
1566 | * Change in command line behavior -- corefiles vs. process ids. |
1567 | ||
1568 | When the '-p NUMBER' or '--pid NUMBER' options are used, and | |
1569 | attaching to process NUMBER fails, GDB no longer attempts to open a | |
1570 | core file named NUMBER. Attaching to a program using the -c option | |
1571 | is no longer supported. Instead, use the '-p' or '--pid' options. | |
1572 | ||
430ebac9 PA |
1573 | * GDB can now be built as a native debugger for debugging Windows x86 |
1574 | (mingw32) Portable Executable (PE) programs. | |
1575 | ||
fe6fbf8b | 1576 | * Pending breakpoints no longer change their number when their address |
8d5f9c6f | 1577 | is resolved. |
fe6fbf8b VP |
1578 | |
1579 | * GDB now supports breakpoints with multiple locations, | |
8d5f9c6f DJ |
1580 | including breakpoints on C++ constructors, inside C++ templates, |
1581 | and in inlined functions. | |
fe6fbf8b | 1582 | |
10665d76 JB |
1583 | * GDB's ability to debug optimized code has been improved. GDB more |
1584 | accurately identifies function bodies and lexical blocks that occupy | |
1585 | more than one contiguous range of addresses. | |
1586 | ||
7cc46491 DJ |
1587 | * Target descriptions can now describe registers for PowerPC. |
1588 | ||
d71340b8 DJ |
1589 | * The GDB remote stub, gdbserver, now supports the AltiVec and SPE |
1590 | registers on PowerPC targets. | |
1591 | ||
523c4513 DJ |
1592 | * The GDB remote stub, gdbserver, now supports thread debugging on GNU/Linux |
1593 | targets even when the libthread_db library is not available. | |
1594 | ||
a6b151f1 DJ |
1595 | * The GDB remote stub, gdbserver, now supports the new file transfer |
1596 | commands (remote put, remote get, and remote delete). | |
1597 | ||
2d717e4f DJ |
1598 | * The GDB remote stub, gdbserver, now supports run and attach in |
1599 | extended-remote mode. | |
1600 | ||
24a836bd | 1601 | * hppa*64*-*-hpux11* target broken |
d001be7a DJ |
1602 | The debugger is unable to start a program and fails with the following |
1603 | error: "Error trying to get information about dynamic linker". | |
1604 | The gdb-6.7 release is also affected. | |
24a836bd | 1605 | |
d0c678e6 UW |
1606 | * GDB now supports the --enable-targets= configure option to allow |
1607 | building a single GDB executable that supports multiple remote | |
1608 | target architectures. | |
1609 | ||
d64a946d TJB |
1610 | * GDB now supports debugging C and C++ programs which use the |
1611 | Decimal Floating Point extension. In addition, the PowerPC target | |
1612 | now has a set of pseudo-registers to inspect decimal float values | |
1613 | stored in two consecutive float registers. | |
1614 | ||
ee163bf5 VP |
1615 | * The -break-insert MI command can optionally create pending |
1616 | breakpoints now. | |
1617 | ||
b93b6ca7 | 1618 | * Improved support for debugging Ada |
d001be7a DJ |
1619 | Many improvements to the Ada language support have been made. These |
1620 | include: | |
b93b6ca7 JB |
1621 | - Better support for Ada2005 interface types |
1622 | - Improved handling of arrays and slices in general | |
1623 | - Better support for Taft-amendment types | |
1624 | - The '{type} ADDRESS' expression is now allowed on the left hand-side | |
1625 | of an assignment | |
1626 | - Improved command completion in Ada | |
1627 | - Several bug fixes | |
1628 | ||
d001be7a DJ |
1629 | * GDB on GNU/Linux and HP/UX can now debug through "exec" of a new |
1630 | process. | |
1631 | ||
a6b151f1 DJ |
1632 | * New commands |
1633 | ||
6d53d0af JB |
1634 | set print frame-arguments (all|scalars|none) |
1635 | show print frame-arguments | |
1636 | The value of this variable can be changed to control which argument | |
1637 | values should be printed by the debugger when displaying a frame. | |
1638 | ||
a6b151f1 DJ |
1639 | remote put |
1640 | remote get | |
1641 | remote delete | |
1642 | Transfer files to and from a remote target, and delete remote files. | |
1643 | ||
1644 | * New MI commands | |
1645 | ||
1646 | -target-file-put | |
1647 | -target-file-get | |
1648 | -target-file-delete | |
1649 | Transfer files to and from a remote target, and delete remote files. | |
1650 | ||
1651 | * New remote packets | |
1652 | ||
1653 | vFile:open: | |
1654 | vFile:close: | |
1655 | vFile:pread: | |
1656 | vFile:pwrite: | |
1657 | vFile:unlink: | |
1658 | Open, close, read, write, and delete files on the remote system. | |
d0c678e6 | 1659 | |
2d717e4f DJ |
1660 | vAttach |
1661 | Attach to an existing process on the remote system, in extended-remote | |
1662 | mode. | |
1663 | ||
1664 | vRun | |
1665 | Run a new process on the remote system, in extended-remote mode. | |
1666 | ||
8d5f9c6f | 1667 | *** Changes in GDB 6.7 |
6dd09645 | 1668 | |
19d378fc MS |
1669 | * Resolved 101 resource leaks, null pointer dereferences, etc. in gdb, |
1670 | bfd, libiberty and opcodes, as revealed by static analysis donated by | |
1671 | Coverity, Inc. (http://scan.coverity.com). | |
1672 | ||
3a40aaa0 UW |
1673 | * When looking up multiply-defined global symbols, GDB will now prefer the |
1674 | symbol definition in the current shared library if it was built using the | |
1675 | -Bsymbolic linker option. | |
1676 | ||
a6ec25f2 BW |
1677 | * When the Text User Interface (TUI) is not configured, GDB will now |
1678 | recognize the -tui command-line option and print a message that the TUI | |
1679 | is not supported. | |
1680 | ||
6dd09645 JB |
1681 | * The GDB remote stub, gdbserver, now has lower overhead for high |
1682 | frequency signals (e.g. SIGALRM) via the QPassSignals packet. | |
1683 | ||
c9bb8148 DJ |
1684 | * GDB for MIPS targets now autodetects whether a remote target provides |
1685 | 32-bit or 64-bit register values. | |
1686 | ||
0d5de010 DJ |
1687 | * Support for C++ member pointers has been improved. |
1688 | ||
23181151 DJ |
1689 | * GDB now understands XML target descriptions, which specify the |
1690 | target's overall architecture. GDB can read a description from | |
1691 | a local file or over the remote serial protocol. | |
1692 | ||
ea37ba09 DJ |
1693 | * Vectors of single-byte data use a new integer type which is not |
1694 | automatically displayed as character or string data. | |
1695 | ||
1696 | * The /s format now works with the print command. It displays | |
1697 | arrays of single-byte integers and pointers to single-byte integers | |
1698 | as strings. | |
e1f48ead | 1699 | |
123dc839 DJ |
1700 | * Target descriptions can now describe target-specific registers, |
1701 | for architectures which have implemented the support (currently | |
8d5f9c6f | 1702 | only ARM, M68K, and MIPS). |
123dc839 | 1703 | |
05a4558a DJ |
1704 | * GDB and the GDB remote stub, gdbserver, now support the XScale |
1705 | iWMMXt coprocessor. | |
fb1e4ffc | 1706 | |
7c963485 PA |
1707 | * The GDB remote stub, gdbserver, has been updated to support |
1708 | ARM Windows CE (mingw32ce) debugging, and GDB Windows CE support | |
1709 | has been rewritten to use the standard GDB remote protocol. | |
1710 | ||
b18be20d DJ |
1711 | * GDB can now step into C++ functions which are called through thunks. |
1712 | ||
0ca420ce UW |
1713 | * GDB for the Cell/B.E. SPU now supports overlay debugging. |
1714 | ||
31d99776 DJ |
1715 | * The GDB remote protocol "qOffsets" packet can now honor ELF segment |
1716 | layout. It also supports a TextSeg= and DataSeg= response when only | |
1717 | segment base addresses (rather than offsets) are available. | |
1718 | ||
a4642986 MR |
1719 | * The /i format now outputs any trailing branch delay slot instructions |
1720 | immediately following the last instruction within the count specified. | |
1721 | ||
cfa9d6d9 DJ |
1722 | * The GDB remote protocol "T" stop reply packet now supports a |
1723 | "library" response. Combined with the new "qXfer:libraries:read" | |
1724 | packet, this response allows GDB to debug shared libraries on targets | |
1725 | where the operating system manages the list of loaded libraries (e.g. | |
1726 | Windows and SymbianOS). | |
255e7678 DJ |
1727 | |
1728 | * The GDB remote stub, gdbserver, now supports dynamic link libraries | |
1729 | (DLLs) on Windows and Windows CE targets. | |
f5db8714 JK |
1730 | |
1731 | * GDB now supports a faster verification that a .debug file matches its binary | |
1732 | according to its build-id signature, if the signature is present. | |
cfa9d6d9 | 1733 | |
c9bb8148 DJ |
1734 | * New commands |
1735 | ||
23776285 MR |
1736 | set remoteflow |
1737 | show remoteflow | |
1738 | Enable or disable hardware flow control (RTS/CTS) on the serial port | |
1739 | when debugging using remote targets. | |
1740 | ||
c9bb8148 DJ |
1741 | set mem inaccessible-by-default |
1742 | show mem inaccessible-by-default | |
1743 | If the target supplies a memory map, for instance via the remote | |
1744 | protocol's "qXfer:memory-map:read" packet, setting this variable | |
1745 | prevents GDB from accessing memory outside the memory map. This | |
1746 | is useful for targets with memory mapped registers or which react | |
1747 | badly to accesses of unmapped address space. | |
1748 | ||
1749 | set breakpoint auto-hw | |
1750 | show breakpoint auto-hw | |
1751 | If the target supplies a memory map, for instance via the remote | |
1752 | protocol's "qXfer:memory-map:read" packet, setting this variable | |
1753 | lets GDB use hardware breakpoints automatically for memory regions | |
1754 | where it can not use software breakpoints. This covers both the | |
1755 | "break" command and internal breakpoints used for other commands | |
1756 | including "next" and "finish". | |
1757 | ||
0e420bd8 JB |
1758 | catch exception |
1759 | catch exception unhandled | |
1760 | Stop the program execution when Ada exceptions are raised. | |
1761 | ||
1762 | catch assert | |
1763 | Stop the program execution when an Ada assertion failed. | |
1764 | ||
f822c95b DJ |
1765 | set sysroot |
1766 | show sysroot | |
1767 | Set an alternate system root for target files. This is a more | |
1768 | general version of "set solib-absolute-prefix", which is now | |
1769 | an alias to "set sysroot". | |
1770 | ||
83cc5c53 UW |
1771 | info spu |
1772 | Provide extended SPU facility status information. This set of | |
1773 | commands is available only when debugging the Cell/B.E. SPU | |
1774 | architecture. | |
1775 | ||
bd372731 MK |
1776 | * New native configurations |
1777 | ||
1778 | OpenBSD/sh sh*-*openbsd* | |
1779 | ||
23181151 DJ |
1780 | set tdesc filename |
1781 | unset tdesc filename | |
1782 | show tdesc filename | |
1783 | Use the specified local file as an XML target description, and do | |
1784 | not query the target for its built-in description. | |
1785 | ||
c9bb8148 DJ |
1786 | * New targets |
1787 | ||
54fe9172 | 1788 | OpenBSD/sh sh*-*-openbsd* |
c9bb8148 | 1789 | MIPS64 GNU/Linux (gdbserver) mips64-linux-gnu |
c077150c | 1790 | Toshiba Media Processor mep-elf |
c9bb8148 | 1791 | |
6dd09645 JB |
1792 | * New remote packets |
1793 | ||
1794 | QPassSignals: | |
1795 | Ignore the specified signals; pass them directly to the debugged program | |
1796 | without stopping other threads or reporting them to GDB. | |
1797 | ||
23181151 DJ |
1798 | qXfer:features:read: |
1799 | Read an XML target description from the target, which describes its | |
1800 | features. | |
6dd09645 | 1801 | |
83cc5c53 UW |
1802 | qXfer:spu:read: |
1803 | qXfer:spu:write: | |
1804 | Read or write contents of an spufs file on the target system. These | |
1805 | packets are available only on the Cell/B.E. SPU architecture. | |
1806 | ||
cfa9d6d9 DJ |
1807 | qXfer:libraries:read: |
1808 | Report the loaded shared libraries. Combined with new "T" packet | |
1809 | response, this packet allows GDB to debug shared libraries on | |
1810 | targets where the operating system manages the list of loaded | |
1811 | libraries (e.g. Windows and SymbianOS). | |
1812 | ||
483367ee DJ |
1813 | * Removed targets |
1814 | ||
1815 | Support for these obsolete configurations has been removed. | |
1816 | ||
d08950c4 UW |
1817 | alpha*-*-osf1* |
1818 | alpha*-*-osf2* | |
7ce59000 | 1819 | d10v-*-* |
483367ee DJ |
1820 | hppa*-*-hiux* |
1821 | i[34567]86-ncr-* | |
1822 | i[34567]86-*-dgux* | |
1823 | i[34567]86-*-lynxos* | |
1824 | i[34567]86-*-netware* | |
1825 | i[34567]86-*-sco3.2v5* | |
1826 | i[34567]86-*-sco3.2v4* | |
1827 | i[34567]86-*-sco* | |
1828 | i[34567]86-*-sysv4.2* | |
1829 | i[34567]86-*-sysv4* | |
1830 | i[34567]86-*-sysv5* | |
1831 | i[34567]86-*-unixware2* | |
1832 | i[34567]86-*-unixware* | |
1833 | i[34567]86-*-sysv* | |
1834 | i[34567]86-*-isc* | |
1835 | m68*-cisco*-* | |
1836 | m68*-tandem-* | |
ad527d2e | 1837 | mips*-*-pe |
483367ee | 1838 | rs6000-*-lynxos* |
ad527d2e | 1839 | sh*-*-pe |
483367ee | 1840 | |
7ce59000 DJ |
1841 | * Other removed features |
1842 | ||
1843 | target abug | |
1844 | target cpu32bug | |
1845 | target est | |
1846 | target rom68k | |
1847 | ||
1848 | Various m68k-only ROM monitors. | |
1849 | ||
ea35711c DJ |
1850 | target hms |
1851 | target e7000 | |
1852 | target sh3 | |
1853 | target sh3e | |
1854 | ||
1855 | Various Renesas ROM monitors and debugging interfaces for SH and | |
1856 | H8/300. | |
1857 | ||
1858 | target ocd | |
1859 | ||
1860 | Support for a Macraigor serial interface to on-chip debugging. | |
1861 | GDB does not directly support the newer parallel or USB | |
1862 | interfaces. | |
1863 | ||
7ce59000 DJ |
1864 | DWARF 1 support |
1865 | ||
1866 | A debug information format. The predecessor to DWARF 2 and | |
1867 | DWARF 3, which are still supported. | |
1868 | ||
54d61198 DJ |
1869 | Support for the HP aCC compiler on HP-UX/PA-RISC |
1870 | ||
1871 | SOM-encapsulated symbolic debugging information, automatic | |
1872 | invocation of pxdb, and the aCC custom C++ ABI. This does not | |
1873 | affect HP-UX for Itanium or GCC for HP-UX/PA-RISC. Code compiled | |
1874 | with aCC can still be debugged on an assembly level. | |
1875 | ||
ea35711c DJ |
1876 | MIPS ".pdr" sections |
1877 | ||
1878 | A MIPS-specific format used to describe stack frame layout | |
1879 | in debugging information. | |
1880 | ||
1881 | Scheme support | |
1882 | ||
1883 | GDB could work with an older version of Guile to debug | |
1884 | the interpreter and Scheme programs running in it. | |
1885 | ||
1a69e1e4 DJ |
1886 | set mips stack-arg-size |
1887 | set mips saved-gpreg-size | |
1888 | ||
1889 | Use "set mips abi" to control parameter passing for MIPS. | |
1890 | ||
6dd09645 | 1891 | *** Changes in GDB 6.6 |
e374b601 | 1892 | |
ca3bf3bd DJ |
1893 | * New targets |
1894 | ||
1895 | Xtensa xtensa-elf | |
9c309e77 | 1896 | Cell Broadband Engine SPU spu-elf |
ca3bf3bd | 1897 | |
6aec2e11 DJ |
1898 | * GDB can now be configured as a cross-debugger targeting native Windows |
1899 | (mingw32) or Cygwin. It can communicate with a remote debugging stub | |
1900 | running on a Windows system over TCP/IP to debug Windows programs. | |
1901 | ||
1902 | * The GDB remote stub, gdbserver, has been updated to support Windows and | |
1903 | Cygwin debugging. Both single-threaded and multi-threaded programs are | |
1904 | supported. | |
1905 | ||
17218d91 DJ |
1906 | * The "set trust-readonly-sections" command works again. This command was |
1907 | broken in GDB 6.3, 6.4, and 6.5. | |
1908 | ||
9ebce043 DJ |
1909 | * The "load" command now supports writing to flash memory, if the remote |
1910 | stub provides the required support. | |
1911 | ||
7d3d3ece DJ |
1912 | * Support for GNU/Linux Thread Local Storage (TLS, per-thread variables) no |
1913 | longer requires symbolic debug information (e.g. DWARF-2). | |
1914 | ||
4f8253f3 JB |
1915 | * New commands |
1916 | ||
1917 | set substitute-path | |
1918 | unset substitute-path | |
1919 | show substitute-path | |
1920 | Manage a list of substitution rules that GDB uses to rewrite the name | |
1921 | of the directories where the sources are located. This can be useful | |
1922 | for instance when the sources were moved to a different location | |
1923 | between compilation and debugging. | |
1924 | ||
9fa66fd7 AS |
1925 | set trace-commands |
1926 | show trace-commands | |
1927 | Print each CLI command as it is executed. Each command is prefixed with | |
1928 | a number of `+' symbols representing the nesting depth. | |
1929 | The source command now has a `-v' option to enable the same feature. | |
1930 | ||
1f5befc1 DJ |
1931 | * REMOVED features |
1932 | ||
1933 | The ARM Demon monitor support (RDP protocol, "target rdp"). | |
1934 | ||
2ec3381a DJ |
1935 | Kernel Object Display, an embedded debugging feature which only worked with |
1936 | an obsolete version of Cisco IOS. | |
1937 | ||
3d00d119 DJ |
1938 | The 'set download-write-size' and 'show download-write-size' commands. |
1939 | ||
be2a5f71 DJ |
1940 | * New remote packets |
1941 | ||
1942 | qSupported: | |
1943 | Tell a stub about GDB client features, and request remote target features. | |
1944 | The first feature implemented is PacketSize, which allows the target to | |
1945 | specify the size of packets it can handle - to minimize the number of | |
1946 | packets required and improve performance when connected to a remote | |
1947 | target. | |
1948 | ||
0876f84a DJ |
1949 | qXfer:auxv:read: |
1950 | Fetch an OS auxilliary vector from the remote stub. This packet is a | |
1951 | more efficient replacement for qPart:auxv:read. | |
1952 | ||
9ebce043 DJ |
1953 | qXfer:memory-map:read: |
1954 | Fetch a memory map from the remote stub, including information about | |
1955 | RAM, ROM, and flash memory devices. | |
1956 | ||
1957 | vFlashErase: | |
1958 | vFlashWrite: | |
1959 | vFlashDone: | |
1960 | Erase and program a flash memory device. | |
1961 | ||
0876f84a DJ |
1962 | * Removed remote packets |
1963 | ||
1964 | qPart:auxv:read: | |
1965 | This packet has been replaced by qXfer:auxv:read. Only GDB 6.4 and 6.5 | |
1966 | used it, and only gdbserver implemented it. | |
1967 | ||
e374b601 | 1968 | *** Changes in GDB 6.5 |
53e5f3cf | 1969 | |
96309189 MS |
1970 | * New targets |
1971 | ||
1972 | Renesas M32C/M16C m32c-elf | |
1973 | ||
1974 | Morpho Technologies ms1 ms1-elf | |
1975 | ||
53e5f3cf AS |
1976 | * New commands |
1977 | ||
1978 | init-if-undefined Initialize a convenience variable, but | |
1979 | only if it doesn't already have a value. | |
1980 | ||
ac264b3b MS |
1981 | The following commands are presently only implemented for native GNU/Linux: |
1982 | ||
1983 | checkpoint Save a snapshot of the program state. | |
1984 | ||
1985 | restart <n> Return the program state to a | |
1986 | previously saved state. | |
1987 | ||
1988 | info checkpoints List currently saved checkpoints. | |
1989 | ||
1990 | delete-checkpoint <n> Delete a previously saved checkpoint. | |
1991 | ||
1992 | set|show detach-on-fork Tell gdb whether to detach from a newly | |
1993 | forked process, or to keep debugging it. | |
1994 | ||
1995 | info forks List forks of the user program that | |
1996 | are available to be debugged. | |
1997 | ||
1998 | fork <n> Switch to debugging one of several | |
1999 | forks of the user program that are | |
2000 | available to be debugged. | |
2001 | ||
2002 | delete-fork <n> Delete a fork from the list of forks | |
2003 | that are available to be debugged (and | |
2004 | kill the forked process). | |
2005 | ||
2006 | detach-fork <n> Delete a fork from the list of forks | |
2007 | that are available to be debugged (and | |
2008 | allow the process to continue). | |
2009 | ||
3950dc3f NS |
2010 | * New architecture |
2011 | ||
2012 | Morpho Technologies ms2 ms1-elf | |
2013 | ||
0ea3f30e DJ |
2014 | * Improved Windows host support |
2015 | ||
2016 | GDB now builds as a cross debugger hosted on i686-mingw32, including | |
2017 | native console support, and remote communications using either | |
2018 | network sockets or serial ports. | |
2019 | ||
f79daebb GM |
2020 | * Improved Modula-2 language support |
2021 | ||
2022 | GDB can now print most types in the Modula-2 syntax. This includes: | |
2023 | basic types, set types, record types, enumerated types, range types, | |
2024 | pointer types and ARRAY types. Procedure var parameters are correctly | |
2025 | printed and hexadecimal addresses and character constants are also | |
2026 | written in the Modula-2 syntax. Best results can be obtained by using | |
2027 | GNU Modula-2 together with the -gdwarf-2 command line option. | |
2028 | ||
acab6ab2 MM |
2029 | * REMOVED features |
2030 | ||
2031 | The ARM rdi-share module. | |
2032 | ||
f4267320 DJ |
2033 | The Netware NLM debug server. |
2034 | ||
53e5f3cf | 2035 | *** Changes in GDB 6.4 |
156a53ca | 2036 | |
e0ecbda1 MK |
2037 | * New native configurations |
2038 | ||
02a677ac | 2039 | OpenBSD/arm arm*-*-openbsd* |
e0ecbda1 MK |
2040 | OpenBSD/mips64 mips64-*-openbsd* |
2041 | ||
d64a6579 KB |
2042 | * New targets |
2043 | ||
2044 | Morpho Technologies ms1 ms1-elf | |
2045 | ||
b33a6190 AS |
2046 | * New command line options |
2047 | ||
2048 | --batch-silent As for --batch, but totally silent. | |
2049 | --return-child-result The debugger will exist with the same value | |
2050 | the child (debugged) program exited with. | |
2051 | --eval-command COMMAND, -ex COMMAND | |
2052 | Execute a single GDB CLI command. This may be | |
2053 | specified multiple times and in conjunction | |
2054 | with the --command (-x) option. | |
2055 | ||
11dced61 AC |
2056 | * Deprecated commands removed |
2057 | ||
2058 | The following commands, that were deprecated in 2000, have been | |
2059 | removed: | |
2060 | ||
2061 | Command Replacement | |
2062 | set|show arm disassembly-flavor set|show arm disassembler | |
2063 | othernames set arm disassembler | |
2064 | set|show remotedebug set|show debug remote | |
2065 | set|show archdebug set|show debug arch | |
2066 | set|show eventdebug set|show debug event | |
2067 | regs info registers | |
2068 | ||
6fe85783 MK |
2069 | * New BSD user-level threads support |
2070 | ||
2071 | It is now possible to debug programs using the user-level threads | |
2072 | library on OpenBSD and FreeBSD. Currently supported (target) | |
2073 | configurations are: | |
2074 | ||
2075 | FreeBSD/amd64 x86_64-*-freebsd* | |
2076 | FreeBSD/i386 i386-*-freebsd* | |
2077 | OpenBSD/i386 i386-*-openbsd* | |
2078 | ||
2079 | Note that the new kernel threads libraries introduced in FreeBSD 5.x | |
2080 | are not yet supported. | |
2081 | ||
5260ca71 MS |
2082 | * New support for Matsushita MN10300 w/sim added |
2083 | (Work in progress). mn10300-elf. | |
2084 | ||
e84ecc99 AC |
2085 | * REMOVED configurations and files |
2086 | ||
2087 | VxWorks and the XDR protocol *-*-vxworks | |
9445aa30 | 2088 | Motorola MCORE mcore-*-* |
9445aa30 | 2089 | National Semiconductor NS32000 ns32k-*-* |
156a53ca | 2090 | |
31e35378 JB |
2091 | * New "set print array-indexes" command |
2092 | ||
2093 | After turning this setting "on", GDB prints the index of each element | |
2094 | when displaying arrays. The default is "off" to preserve the previous | |
2095 | behavior. | |
2096 | ||
e85e5c83 MK |
2097 | * VAX floating point support |
2098 | ||
2099 | GDB now supports the not-quite-ieee VAX F and D floating point formats. | |
2100 | ||
d91e9901 AS |
2101 | * User-defined command support |
2102 | ||
2103 | In addition to using $arg0..$arg9 for argument passing, it is now possible | |
2104 | to use $argc to determine now many arguments have been passed. See the | |
2105 | section on user-defined commands in the user manual for more information. | |
2106 | ||
f2cb65ca MC |
2107 | *** Changes in GDB 6.3: |
2108 | ||
f47b1503 AS |
2109 | * New command line option |
2110 | ||
2111 | GDB now accepts -l followed by a number to set the timeout for remote | |
2112 | debugging. | |
2113 | ||
f2cb65ca MC |
2114 | * GDB works with GCC -feliminate-dwarf2-dups |
2115 | ||
2116 | GDB now supports a more compact representation of DWARF-2 debug | |
2117 | information using DW_FORM_ref_addr references. These are produced | |
2118 | by GCC with the option -feliminate-dwarf2-dups and also by some | |
2119 | proprietary compilers. With GCC, you must use GCC 3.3.4 or later | |
2120 | to use -feliminate-dwarf2-dups. | |
860660cb | 2121 | |
d08c0230 AC |
2122 | * Internationalization |
2123 | ||
2124 | When supported by the host system, GDB will be built with | |
2125 | internationalization (libintl). The task of marking up the sources is | |
2126 | continued, we're looking forward to our first translation. | |
2127 | ||
117ea3cf PH |
2128 | * Ada |
2129 | ||
2130 | Initial support for debugging programs compiled with the GNAT | |
2131 | implementation of the Ada programming language has been integrated | |
2132 | into GDB. In this release, support is limited to expression evaluation. | |
2133 | ||
d08c0230 AC |
2134 | * New native configurations |
2135 | ||
2136 | GNU/Linux/m32r m32r-*-linux-gnu | |
2137 | ||
2138 | * Remote 'p' packet | |
2139 | ||
2140 | GDB's remote protocol now includes support for the 'p' packet. This | |
2141 | packet is used to fetch individual registers from a remote inferior. | |
2142 | ||
2143 | * END-OF-LIFE registers[] compatibility module | |
2144 | ||
2145 | GDB's internal register infrastructure has been completely rewritten. | |
2146 | The new infrastructure making possible the implementation of key new | |
2147 | features including 32x64 (e.g., 64-bit amd64 GDB debugging a 32-bit | |
2148 | i386 application). | |
2149 | ||
2150 | GDB 6.3 will be the last release to include the the registers[] | |
2151 | compatibility module that allowed out-of-date configurations to | |
2152 | continue to work. This change directly impacts the following | |
2153 | configurations: | |
2154 | ||
2155 | hppa-*-hpux | |
2156 | ia64-*-aix | |
2157 | mips-*-irix* | |
2158 | *-*-lynx | |
2159 | mips-*-linux-gnu | |
2160 | sds protocol | |
2161 | xdr protocol | |
2162 | powerpc bdm protocol | |
2163 | ||
2164 | Unless there is activity to revive these configurations, they will be | |
2165 | made OBSOLETE in GDB 6.4, and REMOVED from GDB 6.5. | |
2166 | ||
2167 | * OBSOLETE configurations and files | |
2168 | ||
2169 | Configurations that have been declared obsolete in this release have | |
2170 | been commented out. Unless there is activity to revive these | |
2171 | configurations, the next release of GDB will have their sources | |
2172 | permanently REMOVED. | |
2173 | ||
2174 | h8300-*-* | |
2175 | mcore-*-* | |
2176 | mn10300-*-* | |
2177 | ns32k-*-* | |
2178 | sh64-*-* | |
2179 | v850-*-* | |
2180 | ||
ebb7c577 AC |
2181 | *** Changes in GDB 6.2.1: |
2182 | ||
2183 | * MIPS `break main; run' gave an heuristic-fence-post warning | |
2184 | ||
2185 | When attempting to run even a simple program, a warning about | |
2186 | heuristic-fence-post being hit would be reported. This problem has | |
2187 | been fixed. | |
2188 | ||
2189 | * MIPS IRIX 'long double' crashed GDB | |
2190 | ||
2191 | When examining a long double variable, GDB would get a segmentation | |
2192 | fault. The crash has been fixed (but GDB 6.2 cannot correctly examine | |
2193 | IRIX long double values). | |
2194 | ||
2195 | * VAX and "next" | |
2196 | ||
2197 | A bug in the VAX stack code was causing problems with the "next" | |
2198 | command. This problem has been fixed. | |
2199 | ||
860660cb | 2200 | *** Changes in GDB 6.2: |
faae5abe | 2201 | |
0dea2468 AC |
2202 | * Fix for ``many threads'' |
2203 | ||
2204 | On GNU/Linux systems that use the NPTL threads library, a program | |
2205 | rapidly creating and deleting threads would confuse GDB leading to the | |
2206 | error message: | |
2207 | ||
2208 | ptrace: No such process. | |
2209 | thread_db_get_info: cannot get thread info: generic error | |
2210 | ||
2211 | This problem has been fixed. | |
2212 | ||
2c07db7a AC |
2213 | * "-async" and "-noasync" options removed. |
2214 | ||
2215 | Support for the broken "-noasync" option has been removed (it caused | |
2216 | GDB to dump core). | |
2217 | ||
c23968a2 JB |
2218 | * New ``start'' command. |
2219 | ||
2220 | This command runs the program until the begining of the main procedure. | |
2221 | ||
71009278 MK |
2222 | * New BSD Kernel Data Access Library (libkvm) interface |
2223 | ||
2224 | Using ``target kvm'' it is now possible to debug kernel core dumps and | |
2225 | live kernel memory images on various FreeBSD, NetBSD and OpenBSD | |
2226 | platforms. Currently supported (native-only) configurations are: | |
2227 | ||
2228 | FreeBSD/amd64 x86_64-*-freebsd* | |
2229 | FreeBSD/i386 i?86-*-freebsd* | |
2230 | NetBSD/i386 i?86-*-netbsd* | |
2231 | NetBSD/m68k m68*-*-netbsd* | |
2232 | NetBSD/sparc sparc-*-netbsd* | |
2233 | OpenBSD/amd64 x86_64-*-openbsd* | |
2234 | OpenBSD/i386 i?86-*-openbsd* | |
2235 | OpenBSD/m68k m68*-openbsd* | |
2236 | OpenBSD/sparc sparc-*-openbsd* | |
2237 | ||
3c0b7db2 AC |
2238 | * Signal trampoline code overhauled |
2239 | ||
2240 | Many generic problems with GDB's signal handling code have been fixed. | |
2241 | These include: backtraces through non-contiguous stacks; recognition | |
2242 | of sa_sigaction signal trampolines; backtrace from a NULL pointer | |
2243 | call; backtrace through a signal trampoline; step into and out of | |
2244 | signal handlers; and single-stepping in the signal trampoline. | |
2245 | ||
73cc75f3 AC |
2246 | Please note that kernel bugs are a limiting factor here. These |
2247 | features have been shown to work on an s390 GNU/Linux system that | |
2248 | include a 2.6.8-rc1 kernel. Ref PR breakpoints/1702. | |
3c0b7db2 | 2249 | |
7243600a BF |
2250 | * Cygwin support for DWARF 2 added. |
2251 | ||
6f606e1c MK |
2252 | * New native configurations |
2253 | ||
97dc871c | 2254 | GNU/Linux/hppa hppa*-*-linux* |
0e56aeaf | 2255 | OpenBSD/hppa hppa*-*-openbsd* |
bf2ca189 MK |
2256 | OpenBSD/m68k m68*-*-openbsd* |
2257 | OpenBSD/m88k m88*-*-openbsd* | |
d195bc9f | 2258 | OpenBSD/powerpc powerpc-*-openbsd* |
6f606e1c | 2259 | NetBSD/vax vax-*-netbsd* |
9f076e7a | 2260 | OpenBSD/vax vax-*-openbsd* |
6f606e1c | 2261 | |
a1b461bf AC |
2262 | * END-OF-LIFE frame compatibility module |
2263 | ||
2264 | GDB's internal frame infrastructure has been completely rewritten. | |
2265 | The new infrastructure making it possible to support key new features | |
2266 | including DWARF 2 Call Frame Information. To aid in the task of | |
2267 | migrating old configurations to this new infrastructure, a | |
2268 | compatibility module, that allowed old configurations to continue to | |
2269 | work, was also included. | |
2270 | ||
2271 | GDB 6.2 will be the last release to include this frame compatibility | |
2272 | module. This change directly impacts the following configurations: | |
2273 | ||
2274 | h8300-*-* | |
2275 | mcore-*-* | |
2276 | mn10300-*-* | |
2277 | ns32k-*-* | |
2278 | sh64-*-* | |
2279 | v850-*-* | |
2280 | xstormy16-*-* | |
2281 | ||
2282 | Unless there is activity to revive these configurations, they will be | |
2283 | made OBSOLETE in GDB 6.3, and REMOVED from GDB 6.4. | |
2284 | ||
3c7012f5 AC |
2285 | * REMOVED configurations and files |
2286 | ||
2287 | Sun 3, running SunOS 3 m68*-*-sunos3* | |
2288 | Sun 3, running SunOS 4 m68*-*-sunos4* | |
2289 | Sun 2, running SunOS 3 m68000-*-sunos3* | |
2290 | Sun 2, running SunOS 4 m68000-*-sunos4* | |
2291 | Motorola 680x0 running LynxOS m68*-*-lynxos* | |
2292 | AT&T 3b1/Unix pc m68*-att-* | |
2293 | Bull DPX2 (68k, System V release 3) m68*-bull-sysv* | |
2294 | decstation mips-dec-* mips-little-* | |
2295 | riscos mips-*-riscos* mips-*-sysv* | |
2296 | sonymips mips-sony-* | |
2297 | sysv mips*-*-sysv4* (IRIX 5/6 not included) | |
2298 | ||
e5fe55f7 AC |
2299 | *** Changes in GDB 6.1.1: |
2300 | ||
2301 | * TUI (Text-mode User Interface) built-in (also included in GDB 6.1) | |
2302 | ||
2303 | The TUI (Text-mode User Interface) is now built as part of a default | |
2304 | GDB configuration. It is enabled by either selecting the TUI with the | |
2305 | command line option "-i=tui" or by running the separate "gdbtui" | |
2306 | program. For more information on the TUI, see the manual "Debugging | |
2307 | with GDB". | |
2308 | ||
2309 | * Pending breakpoint support (also included in GDB 6.1) | |
2310 | ||
2311 | Support has been added to allow you to specify breakpoints in shared | |
2312 | libraries that have not yet been loaded. If a breakpoint location | |
2313 | cannot be found, and the "breakpoint pending" option is set to auto, | |
2314 | GDB queries you if you wish to make the breakpoint pending on a future | |
2315 | shared-library load. If and when GDB resolves the breakpoint symbol, | |
2316 | the pending breakpoint is removed as one or more regular breakpoints | |
2317 | are created. | |
2318 | ||
2319 | Pending breakpoints are very useful for GCJ Java debugging. | |
2320 | ||
2321 | * Fixed ISO-C build problems | |
2322 | ||
2323 | The files bfd/elf-bfd.h, gdb/dictionary.c and gdb/types.c contained | |
2324 | non ISO-C code that stopped them being built using a more strict ISO-C | |
2325 | compiler (e.g., IBM's C compiler). | |
2326 | ||
2327 | * Fixed build problem on IRIX 5 | |
2328 | ||
2329 | Due to header problems with <sys/proc.h>, the file gdb/proc-api.c | |
2330 | wasn't able to compile compile on an IRIX 5 system. | |
2331 | ||
2332 | * Added execute permission to gdb/gdbserver/configure | |
2333 | ||
2334 | The shell script gdb/testsuite/gdb.stabs/configure lacked execute | |
2335 | permission. This bug would cause configure to fail on a number of | |
2336 | systems (Solaris, IRIX). Ref: server/519. | |
2337 | ||
2338 | * Fixed build problem on hpux2.0w-hp-hpux11.00 using the HP ANSI C compiler | |
2339 | ||
2340 | Older HPUX ANSI C compilers did not accept variable array sizes. somsolib.c | |
2341 | has been updated to use constant array sizes. | |
2342 | ||
2343 | * Fixed a panic in the DWARF Call Frame Info code on Solaris 2.7 | |
2344 | ||
2345 | GCC 3.3.2, on Solaris 2.7, includes the DW_EH_PE_funcrel encoding in | |
2346 | its generated DWARF Call Frame Info. This encoding was causing GDB to | |
2347 | panic, that panic has been fixed. Ref: gdb/1628. | |
2348 | ||
2349 | * Fixed a problem when examining parameters in shared library code. | |
2350 | ||
2351 | When examining parameters in optimized shared library code generated | |
2352 | by a mainline GCC, GDB would incorrectly report ``Variable "..." is | |
2353 | not available''. GDB now correctly displays the variable's value. | |
2354 | ||
faae5abe | 2355 | *** Changes in GDB 6.1: |
f2c06f52 | 2356 | |
9175c9a3 MC |
2357 | * Removed --with-mmalloc |
2358 | ||
2359 | Support for the mmalloc memory manager has been removed, as it | |
2360 | conflicted with the internal gdb byte cache. | |
2361 | ||
3cc87ec0 MK |
2362 | * Changes in AMD64 configurations |
2363 | ||
2364 | The AMD64 target now includes the %cs and %ss registers. As a result | |
2365 | the AMD64 remote protocol has changed; this affects the floating-point | |
2366 | and SSE registers. If you rely on those registers for your debugging, | |
2367 | you should upgrade gdbserver on the remote side. | |
2368 | ||
f0424ef6 MK |
2369 | * Revised SPARC target |
2370 | ||
2371 | The SPARC target has been completely revised, incorporating the | |
2372 | FreeBSD/sparc64 support that was added for GDB 6.0. As a result | |
03cebad2 MK |
2373 | support for LynxOS and SunOS 4 has been dropped. Calling functions |
2374 | from within GDB on operating systems with a non-executable stack | |
2375 | (Solaris, OpenBSD) now works. | |
f0424ef6 | 2376 | |
59659be2 ILT |
2377 | * New C++ demangler |
2378 | ||
2379 | GDB has a new C++ demangler which does a better job on the mangled | |
2380 | names generated by current versions of g++. It also runs faster, so | |
2381 | with this and other changes gdb should now start faster on large C++ | |
2382 | programs. | |
2383 | ||
9e08b29b DJ |
2384 | * DWARF 2 Location Expressions |
2385 | ||
2386 | GDB support for location expressions has been extended to support function | |
2387 | arguments and frame bases. Older versions of GDB could crash when they | |
2388 | encountered these. | |
2389 | ||
8dfe8985 DC |
2390 | * C++ nested types and namespaces |
2391 | ||
2392 | GDB's support for nested types and namespaces in C++ has been | |
2393 | improved, especially if you use the DWARF 2 debugging format. (This | |
2394 | is the default for recent versions of GCC on most platforms.) | |
2395 | Specifically, if you have a class "Inner" defined within a class or | |
2396 | namespace "Outer", then GDB realizes that the class's name is | |
2397 | "Outer::Inner", not simply "Inner". This should greatly reduce the | |
2398 | frequency of complaints about not finding RTTI symbols. In addition, | |
2399 | if you are stopped at inside of a function defined within a namespace, | |
2400 | GDB modifies its name lookup accordingly. | |
2401 | ||
cced5e27 MK |
2402 | * New native configurations |
2403 | ||
2404 | NetBSD/amd64 x86_64-*-netbsd* | |
27d1e716 | 2405 | OpenBSD/amd64 x86_64-*-openbsd* |
2031c21a | 2406 | OpenBSD/alpha alpha*-*-openbsd* |
f2cab569 MK |
2407 | OpenBSD/sparc sparc-*-openbsd* |
2408 | OpenBSD/sparc64 sparc64-*-openbsd* | |
cced5e27 | 2409 | |
b4b4b794 KI |
2410 | * New debugging protocols |
2411 | ||
2412 | M32R with SDI protocol m32r-*-elf* | |
2413 | ||
7989c619 AC |
2414 | * "set prompt-escape-char" command deleted. |
2415 | ||
2416 | The command "set prompt-escape-char" has been deleted. This command, | |
2417 | and its very obscure effet on GDB's prompt, was never documented, | |
2418 | tested, nor mentioned in the NEWS file. | |
2419 | ||
5994185b AC |
2420 | * OBSOLETE configurations and files |
2421 | ||
2422 | Configurations that have been declared obsolete in this release have | |
2423 | been commented out. Unless there is activity to revive these | |
2424 | configurations, the next release of GDB will have their sources | |
2425 | permanently REMOVED. | |
2426 | ||
2427 | Sun 3, running SunOS 3 m68*-*-sunos3* | |
2428 | Sun 3, running SunOS 4 m68*-*-sunos4* | |
2429 | Sun 2, running SunOS 3 m68000-*-sunos3* | |
2430 | Sun 2, running SunOS 4 m68000-*-sunos4* | |
2431 | Motorola 680x0 running LynxOS m68*-*-lynxos* | |
2432 | AT&T 3b1/Unix pc m68*-att-* | |
2433 | Bull DPX2 (68k, System V release 3) m68*-bull-sysv* | |
0748d941 AC |
2434 | decstation mips-dec-* mips-little-* |
2435 | riscos mips-*-riscos* mips-*-sysv* | |
2436 | sonymips mips-sony-* | |
2437 | sysv mips*-*-sysv4* (IRIX 5/6 not included) | |
5994185b | 2438 | |
0ddabb4c AC |
2439 | * REMOVED configurations and files |
2440 | ||
2441 | SGI Irix-4.x mips-sgi-irix4 or iris4 | |
2442 | SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris | |
4a8269c0 AC |
2443 | Z8000 simulator z8k-zilog-none or z8ksim |
2444 | Matsushita MN10200 w/simulator mn10200-*-* | |
2445 | H8/500 simulator h8500-hitachi-hms or h8500hms | |
2446 | HP/PA running BSD hppa*-*-bsd* | |
2447 | HP/PA running OSF/1 hppa*-*-osf* | |
2448 | HP/PA Pro target hppa*-*-pro* | |
2449 | PMAX (MIPS) running Mach 3.0 mips*-*-mach3* | |
cf7c5c23 | 2450 | 386BSD i[3456]86-*-bsd* |
4a8269c0 AC |
2451 | Sequent family i[3456]86-sequent-sysv4* |
2452 | i[3456]86-sequent-sysv* | |
2453 | i[3456]86-sequent-bsd* | |
f0424ef6 MK |
2454 | SPARC running LynxOS sparc-*-lynxos* |
2455 | SPARC running SunOS 4 sparc-*-sunos4* | |
4a8269c0 AC |
2456 | Tsqware Sparclet sparclet-*-* |
2457 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
0ddabb4c | 2458 | |
c7f1390e DJ |
2459 | *** Changes in GDB 6.0: |
2460 | ||
1fe43d45 AC |
2461 | * Objective-C |
2462 | ||
2463 | Support for debugging the Objective-C programming language has been | |
2464 | integrated into GDB. | |
2465 | ||
e6beb428 AC |
2466 | * New backtrace mechanism (includes DWARF 2 Call Frame Information). |
2467 | ||
2468 | DWARF 2's Call Frame Information makes available compiler generated | |
2469 | information that more exactly describes the program's run-time stack. | |
2470 | By using this information, GDB is able to provide more robust stack | |
2471 | backtraces. | |
2472 | ||
2473 | The i386, amd64 (nee, x86-64), Alpha, m68hc11, ia64, and m32r targets | |
2474 | have been updated to use a new backtrace mechanism which includes | |
2475 | DWARF 2 CFI support. | |
2476 | ||
2477 | * Hosted file I/O. | |
2478 | ||
2479 | GDB's remote protocol has been extended to include support for hosted | |
2480 | file I/O (where the remote target uses GDB's file system). See GDB's | |
2481 | remote protocol documentation for details. | |
2482 | ||
2483 | * All targets using the new architecture framework. | |
2484 | ||
2485 | All of GDB's targets have been updated to use the new internal | |
2486 | architecture framework. The way is now open for future GDB releases | |
2487 | to include cross-architecture native debugging support (i386 on amd64, | |
2488 | ppc32 on ppc64). | |
2489 | ||
2490 | * GNU/Linux's Thread Local Storage (TLS) | |
2491 | ||
2492 | GDB now includes support for for the GNU/Linux implementation of | |
2493 | per-thread variables. | |
2494 | ||
2495 | * GNU/Linux's Native POSIX Thread Library (NPTL) | |
2496 | ||
2497 | GDB's thread code has been updated to work with either the new | |
2498 | GNU/Linux NPTL thread library or the older "LinuxThreads" library. | |
2499 | ||
2500 | * Separate debug info. | |
2501 | ||
2502 | GDB, in conjunction with BINUTILS, now supports a mechanism for | |
2503 | automatically loading debug information from a separate file. Instead | |
2504 | of shipping full debug and non-debug versions of system libraries, | |
2505 | system integrators can now instead ship just the stripped libraries | |
2506 | and optional debug files. | |
2507 | ||
2508 | * DWARF 2 Location Expressions | |
2509 | ||
2510 | DWARF 2 Location Expressions allow the compiler to more completely | |
2511 | describe the location of variables (even in optimized code) to the | |
2512 | debugger. | |
2513 | ||
2514 | GDB now includes preliminary support for location expressions (support | |
2515 | for DW_OP_piece is still missing). | |
2516 | ||
2517 | * Java | |
2518 | ||
2519 | A number of long standing bugs that caused GDB to die while starting a | |
2520 | Java application have been fixed. GDB's Java support is now | |
2521 | considered "useable". | |
2522 | ||
85f8f974 DJ |
2523 | * GNU/Linux support for fork, vfork, and exec. |
2524 | ||
2525 | The "catch fork", "catch exec", "catch vfork", and "set follow-fork-mode" | |
2526 | commands are now implemented for GNU/Linux. They require a 2.5.x or later | |
2527 | kernel. | |
2528 | ||
0fac0b41 DJ |
2529 | * GDB supports logging output to a file |
2530 | ||
2531 | There are two new commands, "set logging" and "show logging", which can be | |
2532 | used to capture GDB's output to a file. | |
f2c06f52 | 2533 | |
6ad8ae5c DJ |
2534 | * The meaning of "detach" has changed for gdbserver |
2535 | ||
2536 | The "detach" command will now resume the application, as documented. To | |
2537 | disconnect from gdbserver and leave it stopped, use the new "disconnect" | |
2538 | command. | |
2539 | ||
e286caf2 | 2540 | * d10v, m68hc11 `regs' command deprecated |
5f601589 AC |
2541 | |
2542 | The `info registers' command has been updated so that it displays the | |
2543 | registers using a format identical to the old `regs' command. | |
2544 | ||
d28f9cdf DJ |
2545 | * Profiling support |
2546 | ||
2547 | A new command, "maint set profile on/off", has been added. This command can | |
2548 | be used to enable or disable profiling while running GDB, to profile a | |
2549 | session or a set of commands. In addition there is a new configure switch, | |
2550 | "--enable-profiling", which will cause GDB to be compiled with profiling | |
2551 | data, for more informative profiling results. | |
2552 | ||
da0f9dcd AC |
2553 | * Default MI syntax changed to "mi2". |
2554 | ||
2555 | The default MI (machine interface) syntax, enabled by the command line | |
2556 | option "-i=mi", has been changed to "mi2". The previous MI syntax, | |
b68767c1 | 2557 | "mi1", can be enabled by specifying the option "-i=mi1". |
da0f9dcd AC |
2558 | |
2559 | Support for the original "mi0" syntax (included in GDB 5.0) has been | |
2560 | removed. | |
2561 | ||
fb9b6b35 JJ |
2562 | Fix for gdb/192: removed extraneous space when displaying frame level. |
2563 | Fix for gdb/672: update changelist is now output in mi list format. | |
2564 | Fix for gdb/702: a -var-assign that updates the value now shows up | |
2565 | in a subsequent -var-update. | |
2566 | ||
954a4db8 MK |
2567 | * New native configurations. |
2568 | ||
2569 | FreeBSD/amd64 x86_64-*-freebsd* | |
2570 | ||
6760f9e6 JB |
2571 | * Multi-arched targets. |
2572 | ||
b4263afa | 2573 | HP/PA HPUX11 hppa*-*-hpux* |
85a453d5 | 2574 | Renesas M32R/D w/simulator m32r-*-elf* |
6760f9e6 | 2575 | |
1b831c93 AC |
2576 | * OBSOLETE configurations and files |
2577 | ||
2578 | Configurations that have been declared obsolete in this release have | |
2579 | been commented out. Unless there is activity to revive these | |
2580 | configurations, the next release of GDB will have their sources | |
2581 | permanently REMOVED. | |
2582 | ||
8b0e5691 | 2583 | Z8000 simulator z8k-zilog-none or z8ksim |
67f16606 | 2584 | Matsushita MN10200 w/simulator mn10200-*-* |
fd2299bd | 2585 | H8/500 simulator h8500-hitachi-hms or h8500hms |
56056df7 AC |
2586 | HP/PA running BSD hppa*-*-bsd* |
2587 | HP/PA running OSF/1 hppa*-*-osf* | |
2588 | HP/PA Pro target hppa*-*-pro* | |
78c43945 | 2589 | PMAX (MIPS) running Mach 3.0 mips*-*-mach3* |
2fbce691 AC |
2590 | Sequent family i[3456]86-sequent-sysv4* |
2591 | i[3456]86-sequent-sysv* | |
2592 | i[3456]86-sequent-bsd* | |
f81824a9 AC |
2593 | Tsqware Sparclet sparclet-*-* |
2594 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
fd2299bd | 2595 | |
5835abe7 NC |
2596 | * REMOVED configurations and files |
2597 | ||
2598 | V850EA ISA | |
1b831c93 AC |
2599 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 |
2600 | IBM AIX PS/2 i[3456]86-*-aix | |
2601 | i386 running Mach 3.0 i[3456]86-*-mach3* | |
2602 | i386 running Mach i[3456]86-*-mach* | |
2603 | i386 running OSF/1 i[3456]86-*osf1mk* | |
2604 | HP/Apollo 68k Family m68*-apollo*-sysv*, | |
2605 | m68*-apollo*-bsd*, | |
2606 | m68*-hp-bsd*, m68*-hp-hpux* | |
2607 | Argonaut Risc Chip (ARC) arc-*-* | |
2608 | Mitsubishi D30V d30v-*-* | |
2609 | Fujitsu FR30 fr30-*-elf* | |
2610 | OS/9000 i[34]86-*-os9k | |
2611 | I960 with MON960 i960-*-coff | |
5835abe7 | 2612 | |
a094c6fb AC |
2613 | * MIPS $fp behavior changed |
2614 | ||
2615 | The convenience variable $fp, for the MIPS, now consistently returns | |
2616 | the address of the current frame's base. Previously, depending on the | |
2617 | context, $fp could refer to either $sp or the current frame's base | |
2618 | address. See ``8.10 Registers'' in the manual ``Debugging with GDB: | |
2619 | The GNU Source-Level Debugger''. | |
2620 | ||
299ffc64 | 2621 | *** Changes in GDB 5.3: |
37057839 | 2622 | |
46248966 AC |
2623 | * GNU/Linux shared library multi-threaded performance improved. |
2624 | ||
2625 | When debugging a multi-threaded application on GNU/Linux, GDB now uses | |
2626 | `/proc', in preference to `ptrace' for memory reads. This may result | |
2627 | in an improvement in the start-up time of multi-threaded, shared | |
2628 | library applications when run under GDB. One GDB user writes: ``loads | |
2629 | shared libs like mad''. | |
2630 | ||
b9d14705 | 2631 | * ``gdbserver'' now supports multi-threaded applications on some targets |
6da02953 | 2632 | |
b9d14705 DJ |
2633 | Support for debugging multi-threaded applications which use |
2634 | the GNU/Linux LinuxThreads package has been added for | |
2635 | arm*-*-linux*-gnu*, i[3456]86-*-linux*-gnu*, mips*-*-linux*-gnu*, | |
2636 | powerpc*-*-linux*-gnu*, and sh*-*-linux*-gnu*. | |
6da02953 | 2637 | |
e0e9281e JB |
2638 | * GDB now supports C/C++ preprocessor macros. |
2639 | ||
2640 | GDB now expands preprocessor macro invocations in C/C++ expressions, | |
2641 | and provides various commands for showing macro definitions and how | |
2642 | they expand. | |
2643 | ||
dd73b9bb AC |
2644 | The new command `macro expand EXPRESSION' expands any macro |
2645 | invocations in expression, and shows the result. | |
2646 | ||
2647 | The new command `show macro MACRO-NAME' shows the definition of the | |
2648 | macro named MACRO-NAME, and where it was defined. | |
2649 | ||
e0e9281e JB |
2650 | Most compilers don't include information about macros in the debugging |
2651 | information by default. In GCC 3.1, for example, you need to compile | |
2652 | your program with the options `-gdwarf-2 -g3'. If the macro | |
2653 | information is present in the executable, GDB will read it. | |
2654 | ||
2250ee0c CV |
2655 | * Multi-arched targets. |
2656 | ||
6e3ba3b8 JT |
2657 | DEC Alpha (partial) alpha*-*-* |
2658 | DEC VAX (partial) vax-*-* | |
2250ee0c | 2659 | NEC V850 v850-*-* |
6e3ba3b8 | 2660 | National Semiconductor NS32000 (partial) ns32k-*-* |
a1789893 GS |
2661 | Motorola 68000 (partial) m68k-*-* |
2662 | Motorola MCORE mcore-*-* | |
2250ee0c | 2663 | |
cd9bfe15 | 2664 | * New targets. |
e33ce519 | 2665 | |
456f8b9d DB |
2666 | Fujitsu FRV architecture added by Red Hat frv*-*-* |
2667 | ||
e33ce519 | 2668 | |
da8ca43d JT |
2669 | * New native configurations |
2670 | ||
2671 | Alpha NetBSD alpha*-*-netbsd* | |
029923d4 | 2672 | SH NetBSD sh*-*-netbsdelf* |
45888261 | 2673 | MIPS NetBSD mips*-*-netbsd* |
9ce5c36a | 2674 | UltraSPARC NetBSD sparc64-*-netbsd* |
da8ca43d | 2675 | |
cd9bfe15 AC |
2676 | * OBSOLETE configurations and files |
2677 | ||
2678 | Configurations that have been declared obsolete in this release have | |
2679 | been commented out. Unless there is activity to revive these | |
2680 | configurations, the next release of GDB will have their sources | |
2681 | permanently REMOVED. | |
2682 | ||
92eb23c5 | 2683 | Mitsubishi D30V d30v-*-* |
a99a9e1b | 2684 | OS/9000 i[34]86-*-os9k |
1c7cc583 | 2685 | IBM AIX PS/2 i[3456]86-*-aix |
7a3085c1 | 2686 | Fujitsu FR30 fr30-*-elf* |
7fb623f7 | 2687 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 |
eb4c54a2 | 2688 | Argonaut Risc Chip (ARC) arc-*-* |
d8ee244c MK |
2689 | i386 running Mach 3.0 i[3456]86-*-mach3* |
2690 | i386 running Mach i[3456]86-*-mach* | |
2691 | i386 running OSF/1 i[3456]86-*osf1mk* | |
822e978b AC |
2692 | HP/Apollo 68k Family m68*-apollo*-sysv*, |
2693 | m68*-apollo*-bsd*, | |
2694 | m68*-hp-bsd*, m68*-hp-hpux* | |
4d210288 | 2695 | I960 with MON960 i960-*-coff |
92eb23c5 | 2696 | |
db034ac5 AC |
2697 | * OBSOLETE languages |
2698 | ||
2699 | CHILL, a Pascal like language used by telecommunications companies. | |
2700 | ||
cd9bfe15 AC |
2701 | * REMOVED configurations and files |
2702 | ||
2703 | AMD 29k family via UDI a29k-amd-udi, udi29k | |
2704 | A29K VxWorks a29k-*-vxworks | |
2705 | AMD 29000 embedded, using EBMON a29k-none-none | |
2706 | AMD 29000 embedded with COFF a29k-none-coff | |
2707 | AMD 29000 embedded with a.out a29k-none-aout | |
2708 | ||
2709 | testsuite/gdb.hp/gdb.threads-hp/ directory | |
2710 | ||
20f01a46 DH |
2711 | * New command "set max-user-call-depth <nnn>" |
2712 | ||
2713 | This command allows the user to limit the call depth of user-defined | |
2714 | commands. The default is 1024. | |
2715 | ||
a5941fbf MK |
2716 | * Changes in FreeBSD/i386 native debugging. |
2717 | ||
2718 | Support for the "generate-core-file" has been added. | |
2719 | ||
89743e04 MS |
2720 | * New commands "dump", "append", and "restore". |
2721 | ||
2722 | These commands allow data to be copied from target memory | |
2723 | to a bfd-format or binary file (dump and append), and back | |
2724 | from a file into memory (restore). | |
37057839 | 2725 | |
9fb14e79 JB |
2726 | * Improved "next/step" support on multi-processor Alpha Tru64. |
2727 | ||
2728 | The previous single-step mechanism could cause unpredictable problems, | |
2729 | including the random appearance of SIGSEGV or SIGTRAP signals. The use | |
2730 | of a software single-step mechanism prevents this. | |
2731 | ||
2037aebb AC |
2732 | *** Changes in GDB 5.2.1: |
2733 | ||
2734 | * New targets. | |
2735 | ||
2736 | Atmel AVR avr*-*-* | |
2737 | ||
2738 | * Bug fixes | |
2739 | ||
2740 | gdb/182: gdb/323: gdb/237: On alpha, gdb was reporting: | |
2741 | mdebugread.c:2443: gdb-internal-error: sect_index_data not initialized | |
2742 | Fix, by Joel Brobecker imported from mainline. | |
2743 | ||
2744 | gdb/439: gdb/291: On some ELF object files, gdb was reporting: | |
2745 | dwarf2read.c:1072: gdb-internal-error: sect_index_text not initialize | |
2746 | Fix, by Fred Fish, imported from mainline. | |
2747 | ||
2748 | Dwarf2 .debug_frame & .eh_frame handler improved in many ways. | |
2749 | Surprisingly enough, it works now. | |
2750 | By Michal Ludvig, imported from mainline. | |
2751 | ||
2752 | i386 hardware watchpoint support: | |
2753 | avoid misses on second run for some targets. | |
2754 | By Pierre Muller, imported from mainline. | |
2755 | ||
37057839 | 2756 | *** Changes in GDB 5.2: |
eb7cedd9 | 2757 | |
1a703748 MS |
2758 | * New command "set trust-readonly-sections on[off]". |
2759 | ||
2760 | This command is a hint that tells gdb that read-only sections | |
2761 | really are read-only (ie. that their contents will not change). | |
2762 | In this mode, gdb will go to the object file rather than the | |
2763 | target to read memory from read-only sections (such as ".text"). | |
2764 | This can be a significant performance improvement on some | |
2765 | (notably embedded) targets. | |
2766 | ||
cefd4ef5 MS |
2767 | * New command "generate-core-file" (or "gcore"). |
2768 | ||
55241689 AC |
2769 | This new gdb command allows the user to drop a core file of the child |
2770 | process state at any time. So far it's been implemented only for | |
2771 | GNU/Linux and Solaris, but should be relatively easily ported to other | |
2772 | hosts. Argument is core file name (defaults to core.<pid>). | |
cefd4ef5 | 2773 | |
352ed7b4 MS |
2774 | * New command line option |
2775 | ||
2776 | GDB now accepts --pid or -p followed by a process id. | |
2777 | ||
2778 | * Change in command line behavior -- corefiles vs. process ids. | |
2779 | ||
2780 | There is a subtle behavior in the way in which GDB handles | |
2781 | command line arguments. The first non-flag argument is always | |
2782 | a program to debug, but the second non-flag argument may either | |
2783 | be a corefile or a process id. Previously, GDB would attempt to | |
2784 | open the second argument as a corefile, and if that failed, would | |
2785 | issue a superfluous error message and then attempt to attach it as | |
2786 | a process. Now, if the second argument begins with a non-digit, | |
2787 | it will be treated as a corefile. If it begins with a digit, | |
2788 | GDB will attempt to attach it as a process, and if no such process | |
2789 | is found, will then attempt to open it as a corefile. | |
2790 | ||
fe419ffc RE |
2791 | * Changes in ARM configurations. |
2792 | ||
2793 | Multi-arch support is enabled for all ARM configurations. The ARM/NetBSD | |
2794 | configuration is fully multi-arch. | |
2795 | ||
eb7cedd9 MK |
2796 | * New native configurations |
2797 | ||
fe419ffc | 2798 | ARM NetBSD arm*-*-netbsd* |
eb7cedd9 | 2799 | x86 OpenBSD i[3456]86-*-openbsd* |
55241689 | 2800 | AMD x86-64 running GNU/Linux x86_64-*-linux-* |
768f0842 | 2801 | Sparc64 running FreeBSD sparc64-*-freebsd* |
eb7cedd9 | 2802 | |
c9f63e6b CV |
2803 | * New targets |
2804 | ||
2805 | Sanyo XStormy16 xstormy16-elf | |
2806 | ||
9b4ff276 AC |
2807 | * OBSOLETE configurations and files |
2808 | ||
2809 | Configurations that have been declared obsolete in this release have | |
2810 | been commented out. Unless there is activity to revive these | |
2811 | configurations, the next release of GDB will have their sources | |
2812 | permanently REMOVED. | |
2813 | ||
2814 | AMD 29k family via UDI a29k-amd-udi, udi29k | |
2815 | A29K VxWorks a29k-*-vxworks | |
2816 | AMD 29000 embedded, using EBMON a29k-none-none | |
2817 | AMD 29000 embedded with COFF a29k-none-coff | |
2818 | AMD 29000 embedded with a.out a29k-none-aout | |
2819 | ||
b4ceaee6 | 2820 | testsuite/gdb.hp/gdb.threads-hp/ directory |
9b4ff276 | 2821 | |
e2caac18 AC |
2822 | * REMOVED configurations and files |
2823 | ||
2824 | TI TMS320C80 tic80-*-* | |
7bc65f05 | 2825 | WDC 65816 w65-*-* |
7768dd6c AC |
2826 | PowerPC Solaris powerpcle-*-solaris* |
2827 | PowerPC Windows NT powerpcle-*-cygwin32 | |
2828 | PowerPC Netware powerpc-*-netware* | |
5e734e1f | 2829 | Harris/CXUX m88k m88*-harris-cxux* |
1406caf7 AC |
2830 | Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* |
2831 | ns32k-utek-sysv* ns32k-utek-* | |
7e24f0b1 | 2832 | SunOS 4.0.Xi on i386 i[3456]86-*-sunos* |
9b567150 | 2833 | Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* |
3680c638 AC |
2834 | Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news |
2835 | ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* | |
a752853e | 2836 | Apple Macintosh (MPW) host and target N/A host, powerpc-*-macos* |
e2caac18 | 2837 | |
c2a727fa TT |
2838 | * Changes to command line processing |
2839 | ||
2840 | The new `--args' feature can be used to specify command-line arguments | |
2841 | for the inferior from gdb's command line. | |
2842 | ||
467d8519 TT |
2843 | * Changes to key bindings |
2844 | ||
2845 | There is a new `operate-and-get-next' function bound to `C-o'. | |
2846 | ||
7072a954 AC |
2847 | *** Changes in GDB 5.1.1 |
2848 | ||
2849 | Fix compile problem on DJGPP. | |
2850 | ||
2851 | Fix a problem with floating-point registers on the i386 being | |
2852 | corrupted. | |
2853 | ||
2854 | Fix to stop GDB crashing on .debug_str debug info. | |
2855 | ||
2856 | Numerous documentation fixes. | |
2857 | ||
2858 | Numerous testsuite fixes. | |
2859 | ||
34f47bc4 | 2860 | *** Changes in GDB 5.1: |
139760b7 MK |
2861 | |
2862 | * New native configurations | |
2863 | ||
2864 | Alpha FreeBSD alpha*-*-freebsd* | |
2865 | x86 FreeBSD 3.x and 4.x i[3456]86*-freebsd[34]* | |
55241689 | 2866 | MIPS GNU/Linux mips*-*-linux* |
e23194cb EZ |
2867 | MIPS SGI Irix 6.x mips*-sgi-irix6* |
2868 | ia64 AIX ia64-*-aix* | |
55241689 | 2869 | s390 and s390x GNU/Linux {s390,s390x}-*-linux* |
139760b7 | 2870 | |
bf64bfd6 AC |
2871 | * New targets |
2872 | ||
def90278 | 2873 | Motorola 68HC11 and 68HC12 m68hc11-elf |
24be5c34 | 2874 | CRIS cris-axis |
55241689 | 2875 | UltraSparc running GNU/Linux sparc64-*-linux* |
def90278 | 2876 | |
17e78a56 | 2877 | * OBSOLETE configurations and files |
bf64bfd6 AC |
2878 | |
2879 | x86 FreeBSD before 2.2 i[3456]86*-freebsd{1,2.[01]}*, | |
9b9c068d | 2880 | Harris/CXUX m88k m88*-harris-cxux* |
bb19ff3b AC |
2881 | Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* |
2882 | ns32k-utek-sysv* ns32k-utek-* | |
76f4ea53 AC |
2883 | TI TMS320C80 tic80-*-* |
2884 | WDC 65816 w65-*-* | |
4a1968f4 | 2885 | Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* |
1b2b2c16 AC |
2886 | PowerPC Solaris powerpcle-*-solaris* |
2887 | PowerPC Windows NT powerpcle-*-cygwin32 | |
2888 | PowerPC Netware powerpc-*-netware* | |
24f89b68 | 2889 | SunOS 4.0.Xi on i386 i[3456]86-*-sunos* |
514e603d AC |
2890 | Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news |
2891 | ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* | |
d036b4d9 | 2892 | Apple Macintosh (MPW) host N/A |
bf64bfd6 | 2893 | |
17e78a56 AC |
2894 | stuff.c (Program to stuff files into a specially prepared space in kdb) |
2895 | kdb-start.c (Main loop for the standalone kernel debugger) | |
2896 | ||
7fcca85b AC |
2897 | Configurations that have been declared obsolete in this release have |
2898 | been commented out. Unless there is activity to revive these | |
2899 | configurations, the next release of GDB will have their sources | |
2900 | permanently REMOVED. | |
2901 | ||
a196c81c | 2902 | * REMOVED configurations and files |
7fcca85b AC |
2903 | |
2904 | Altos 3068 m68*-altos-* | |
2905 | Convex c1-*-*, c2-*-* | |
2906 | Pyramid pyramid-*-* | |
2907 | ARM RISCix arm-*-* (as host) | |
2908 | Tahoe tahoe-*-* | |
a196c81c | 2909 | ser-ocd.c *-*-* |
bf64bfd6 | 2910 | |
6d6b80e5 | 2911 | * GDB has been converted to ISO C. |
e23194cb | 2912 | |
6d6b80e5 | 2913 | GDB's source code has been converted to ISO C. In particular, the |
e23194cb EZ |
2914 | sources are fully protoized, and rely on standard headers being |
2915 | present. | |
2916 | ||
bf64bfd6 AC |
2917 | * Other news: |
2918 | ||
e23194cb EZ |
2919 | * "info symbol" works on platforms which use COFF, ECOFF, XCOFF, and NLM. |
2920 | ||
2921 | * The MI enabled by default. | |
2922 | ||
2923 | The new machine oriented interface (MI) introduced in GDB 5.0 has been | |
2924 | revised and enabled by default. Packages which use GDB as a debugging | |
2925 | engine behind a UI or another front end are encouraged to switch to | |
2926 | using the GDB/MI interface, instead of the old annotations interface | |
2927 | which is now deprecated. | |
2928 | ||
2929 | * Support for debugging Pascal programs. | |
2930 | ||
2931 | GDB now includes support for debugging Pascal programs. The following | |
2932 | main features are supported: | |
2933 | ||
2934 | - Pascal-specific data types such as sets; | |
2935 | ||
2936 | - automatic recognition of Pascal sources based on file-name | |
2937 | extension; | |
2938 | ||
2939 | - Pascal-style display of data types, variables, and functions; | |
2940 | ||
2941 | - a Pascal expression parser. | |
2942 | ||
2943 | However, some important features are not yet supported. | |
2944 | ||
2945 | - Pascal string operations are not supported at all; | |
2946 | ||
2947 | - there are some problems with boolean types; | |
2948 | ||
2949 | - Pascal type hexadecimal constants are not supported | |
2950 | because they conflict with the internal variables format; | |
2951 | ||
2952 | - support for Pascal objects and classes is not full yet; | |
2953 | ||
2954 | - unlike Pascal, GDB is case-sensitive for symbol names. | |
2955 | ||
2956 | * Changes in completion. | |
2957 | ||
2958 | Commands such as `shell', `run' and `set args', which pass arguments | |
2959 | to inferior programs, now complete on file names, similar to what | |
2960 | users expect at the shell prompt. | |
2961 | ||
2962 | Commands which accept locations, such as `disassemble', `print', | |
2963 | `breakpoint', `until', etc. now complete on filenames as well as | |
2964 | program symbols. Thus, if you type "break foob TAB", and the source | |
2965 | files linked into the programs include `foobar.c', that file name will | |
2966 | be one of the candidates for completion. However, file names are not | |
2967 | considered for completion after you typed a colon that delimits a file | |
2968 | name from a name of a function in that file, as in "break foo.c:bar". | |
2969 | ||
2970 | `set demangle-style' completes on available demangling styles. | |
2971 | ||
2972 | * New platform-independent commands: | |
2973 | ||
2974 | It is now possible to define a post-hook for a command as well as a | |
2975 | hook that runs before the command. For more details, see the | |
2976 | documentation of `hookpost' in the GDB manual. | |
2977 | ||
2978 | * Changes in GNU/Linux native debugging. | |
2979 | ||
d7275149 MK |
2980 | Support for debugging multi-threaded programs has been completely |
2981 | revised for all platforms except m68k and sparc. You can now debug as | |
2982 | many threads as your system allows you to have. | |
2983 | ||
e23194cb EZ |
2984 | Attach/detach is supported for multi-threaded programs. |
2985 | ||
d7275149 MK |
2986 | Support for SSE registers was added for x86. This doesn't work for |
2987 | multi-threaded programs though. | |
e23194cb EZ |
2988 | |
2989 | * Changes in MIPS configurations. | |
bf64bfd6 AC |
2990 | |
2991 | Multi-arch support is enabled for all MIPS configurations. | |
2992 | ||
e23194cb EZ |
2993 | GDB can now be built as native debugger on SGI Irix 6.x systems for |
2994 | debugging n32 executables. (Debugging 64-bit executables is not yet | |
2995 | supported.) | |
2996 | ||
2997 | * Unified support for hardware watchpoints in all x86 configurations. | |
2998 | ||
2999 | Most (if not all) native x86 configurations support hardware-assisted | |
3000 | breakpoints and watchpoints in a unified manner. This support | |
3001 | implements debug register sharing between watchpoints, which allows to | |
3002 | put a virtually infinite number of watchpoints on the same address, | |
3003 | and also supports watching regions up to 16 bytes with several debug | |
3004 | registers. | |
3005 | ||
3006 | The new maintenance command `maintenance show-debug-regs' toggles | |
3007 | debugging print-outs in functions that insert, remove, and test | |
3008 | watchpoints and hardware breakpoints. | |
3009 | ||
3010 | * Changes in the DJGPP native configuration. | |
3011 | ||
3012 | New command ``info dos sysinfo'' displays assorted information about | |
3013 | the CPU, OS, memory, and DPMI server. | |
3014 | ||
3015 | New commands ``info dos gdt'', ``info dos ldt'', and ``info dos idt'' | |
3016 | display information about segment descriptors stored in GDT, LDT, and | |
3017 | IDT. | |
3018 | ||
3019 | New commands ``info dos pde'' and ``info dos pte'' display entries | |
3020 | from Page Directory and Page Tables (for now works with CWSDPMI only). | |
3021 | New command ``info dos address-pte'' displays the Page Table entry for | |
3022 | a given linear address. | |
3023 | ||
3024 | GDB can now pass command lines longer than 126 characters to the | |
3025 | program being debugged (requires an update to the libdbg.a library | |
3026 | which is part of the DJGPP development kit). | |
3027 | ||
3028 | DWARF2 debug info is now supported. | |
3029 | ||
6c56c069 EZ |
3030 | It is now possible to `step' and `next' through calls to `longjmp'. |
3031 | ||
e23194cb EZ |
3032 | * Changes in documentation. |
3033 | ||
3034 | All GDB documentation was converted to GFDL, the GNU Free | |
3035 | Documentation License. | |
3036 | ||
3037 | Tracepoints-related commands are now fully documented in the GDB | |
3038 | manual. | |
3039 | ||
3040 | TUI, the Text-mode User Interface, is now documented in the manual. | |
3041 | ||
3042 | Tracepoints-related commands are now fully documented in the GDB | |
3043 | manual. | |
3044 | ||
3045 | The "GDB Internals" manual now has an index. It also includes | |
3046 | documentation of `ui_out' functions, GDB coding standards, x86 | |
3047 | hardware watchpoints, and memory region attributes. | |
3048 | ||
5d6640b1 AC |
3049 | * GDB's version number moved to ``version.in'' |
3050 | ||
3051 | The Makefile variable VERSION has been replaced by the file | |
3052 | ``version.in''. People creating GDB distributions should update the | |
3053 | contents of this file. | |
3054 | ||
1a1d8446 AC |
3055 | * gdba.el deleted |
3056 | ||
3057 | GUD support is now a standard part of the EMACS distribution. | |
139760b7 | 3058 | |
9debab2f | 3059 | *** Changes in GDB 5.0: |
7a292a7a | 3060 | |
c63ce875 EZ |
3061 | * Improved support for debugging FP programs on x86 targets |
3062 | ||
3063 | Unified and much-improved support for debugging floating-point | |
3064 | programs on all x86 targets. In particular, ``info float'' now | |
3065 | displays the FP registers in the same format on all x86 targets, with | |
3066 | greater level of detail. | |
3067 | ||
3068 | * Improvements and bugfixes in hardware-assisted watchpoints | |
3069 | ||
3070 | It is now possible to watch array elements, struct members, and | |
3071 | bitfields with hardware-assisted watchpoints. Data-read watchpoints | |
3072 | on x86 targets no longer erroneously trigger when the address is | |
3073 | written. | |
3074 | ||
3075 | * Improvements in the native DJGPP version of GDB | |
3076 | ||
3077 | The distribution now includes all the scripts and auxiliary files | |
3078 | necessary to build the native DJGPP version on MS-DOS/MS-Windows | |
3079 | machines ``out of the box''. | |
3080 | ||
3081 | The DJGPP version can now debug programs that use signals. It is | |
3082 | possible to catch signals that happened in the debuggee, deliver | |
3083 | signals to it, interrupt it with Ctrl-C, etc. (Previously, a signal | |
3084 | would kill the program being debugged.) Programs that hook hardware | |
3085 | interrupts (keyboard, timer, etc.) can also be debugged. | |
3086 | ||
3087 | It is now possible to debug DJGPP programs that redirect their | |
3088 | standard handles or switch them to raw (as opposed to cooked) mode, or | |
3089 | even close them. The command ``run < foo > bar'' works as expected, | |
3090 | and ``info terminal'' reports useful information about the debuggee's | |
3091 | terminal, including raw/cooked mode, redirection, etc. | |
3092 | ||
3093 | The DJGPP version now uses termios functions for console I/O, which | |
3094 | enables debugging graphics programs. Interrupting GDB with Ctrl-C | |
3095 | also works. | |
3096 | ||
3097 | DOS-style file names with drive letters are now fully supported by | |
3098 | GDB. | |
3099 | ||
3100 | It is now possible to debug DJGPP programs that switch their working | |
3101 | directory. It is also possible to rerun the debuggee any number of | |
3102 | times without restarting GDB; thus, you can use the same setup, | |
3103 | breakpoints, etc. for many debugging sessions. | |
3104 | ||
ed9a39eb JM |
3105 | * New native configurations |
3106 | ||
3107 | ARM GNU/Linux arm*-*-linux* | |
afc05dd4 | 3108 | PowerPC GNU/Linux powerpc-*-linux* |
ed9a39eb | 3109 | |
7a292a7a SS |
3110 | * New targets |
3111 | ||
96baa820 | 3112 | Motorola MCore mcore-*-* |
adf40b2e JM |
3113 | x86 VxWorks i[3456]86-*-vxworks* |
3114 | PowerPC VxWorks powerpc-*-vxworks* | |
7a292a7a SS |
3115 | TI TMS320C80 tic80-*-* |
3116 | ||
085dd6e6 JM |
3117 | * OBSOLETE configurations |
3118 | ||
3119 | Altos 3068 m68*-altos-* | |
3120 | Convex c1-*-*, c2-*-* | |
9846de1b | 3121 | Pyramid pyramid-*-* |
ed9a39eb | 3122 | ARM RISCix arm-*-* (as host) |
104c1213 | 3123 | Tahoe tahoe-*-* |
7a292a7a | 3124 | |
9debab2f AC |
3125 | Configurations that have been declared obsolete will be commented out, |
3126 | but the code will be left in place. If there is no activity to revive | |
3127 | these configurations before the next release of GDB, the sources will | |
3128 | be permanently REMOVED. | |
3129 | ||
5330533d SS |
3130 | * Gould support removed |
3131 | ||
3132 | Support for the Gould PowerNode and NP1 has been removed. | |
3133 | ||
bc9e5bbf AC |
3134 | * New features for SVR4 |
3135 | ||
3136 | On SVR4 native platforms (such as Solaris), if you attach to a process | |
3137 | without first loading a symbol file, GDB will now attempt to locate and | |
3138 | load symbols from the running process's executable file. | |
3139 | ||
3140 | * Many C++ enhancements | |
3141 | ||
3142 | C++ support has been greatly improved. Overload resolution now works properly | |
3143 | in almost all cases. RTTI support is on the way. | |
3144 | ||
adf40b2e JM |
3145 | * Remote targets can connect to a sub-program |
3146 | ||
3147 | A popen(3) style serial-device has been added. This device starts a | |
3148 | sub-process (such as a stand-alone simulator) and then communicates | |
3149 | with that. The sub-program to run is specified using the syntax | |
3150 | ``|<program> <args>'' vis: | |
3151 | ||
3152 | (gdb) set remotedebug 1 | |
3153 | (gdb) target extended-remote |mn10300-elf-sim program-args | |
3154 | ||
43e526b9 JM |
3155 | * MIPS 64 remote protocol |
3156 | ||
3157 | A long standing bug in the mips64 remote protocol where by GDB | |
3158 | expected certain 32 bit registers (ex SR) to be transfered as 32 | |
3159 | instead of 64 bits has been fixed. | |
3160 | ||
3161 | The command ``set remote-mips64-transfers-32bit-regs on'' has been | |
3162 | added to provide backward compatibility with older versions of GDB. | |
3163 | ||
96baa820 JM |
3164 | * ``set remotebinarydownload'' replaced by ``set remote X-packet'' |
3165 | ||
3166 | The command ``set remotebinarydownload'' command has been replaced by | |
3167 | ``set remote X-packet''. Other commands in ``set remote'' family | |
3168 | include ``set remote P-packet''. | |
3169 | ||
11cf8741 JM |
3170 | * Breakpoint commands accept ranges. |
3171 | ||
3172 | The breakpoint commands ``enable'', ``disable'', and ``delete'' now | |
3173 | accept a range of breakpoints, e.g. ``5-7''. The tracepoint command | |
3174 | ``tracepoint passcount'' also accepts a range of tracepoints. | |
3175 | ||
7876dd43 DB |
3176 | * ``apropos'' command added. |
3177 | ||
3178 | The ``apropos'' command searches through command names and | |
3179 | documentation strings, printing out matches, making it much easier to | |
3180 | try to find a command that does what you are looking for. | |
3181 | ||
bc9e5bbf AC |
3182 | * New MI interface |
3183 | ||
3184 | A new machine oriented interface (MI) has been added to GDB. This | |
3185 | interface is designed for debug environments running GDB as a separate | |
7162c0ca EZ |
3186 | process. This is part of the long term libGDB project. See the |
3187 | "GDB/MI" chapter of the GDB manual for further information. It can be | |
3188 | enabled by configuring with: | |
bc9e5bbf AC |
3189 | |
3190 | .../configure --enable-gdbmi | |
3191 | ||
c906108c SS |
3192 | *** Changes in GDB-4.18: |
3193 | ||
3194 | * New native configurations | |
3195 | ||
3196 | HP-UX 10.20 hppa*-*-hpux10.20 | |
3197 | HP-UX 11.x hppa*-*-hpux11.0* | |
55241689 | 3198 | M68K GNU/Linux m68*-*-linux* |
c906108c SS |
3199 | |
3200 | * New targets | |
3201 | ||
3202 | Fujitsu FR30 fr30-*-elf* | |
3203 | Intel StrongARM strongarm-*-* | |
3204 | Mitsubishi D30V d30v-*-* | |
3205 | ||
3206 | * OBSOLETE configurations | |
3207 | ||
3208 | Gould PowerNode, NP1 np1-*-*, pn-*-* | |
3209 | ||
3210 | Configurations that have been declared obsolete will be commented out, | |
3211 | but the code will be left in place. If there is no activity to revive | |
3212 | these configurations before the next release of GDB, the sources will | |
3213 | be permanently REMOVED. | |
3214 | ||
3215 | * ANSI/ISO C | |
3216 | ||
3217 | As a compatibility experiment, GDB's source files buildsym.h and | |
3218 | buildsym.c have been converted to pure standard C, no longer | |
3219 | containing any K&R compatibility code. We believe that all systems in | |
3220 | use today either come with a standard C compiler, or have a GCC port | |
3221 | available. If this is not true, please report the affected | |
3222 | configuration to bug-gdb@gnu.org immediately. See the README file for | |
3223 | information about getting a standard C compiler if you don't have one | |
3224 | already. | |
3225 | ||
3226 | * Readline 2.2 | |
3227 | ||
3228 | GDB now uses readline 2.2. | |
3229 | ||
3230 | * set extension-language | |
3231 | ||
3232 | You can now control the mapping between filename extensions and source | |
3233 | languages by using the `set extension-language' command. For instance, | |
3234 | you can ask GDB to treat .c files as C++ by saying | |
3235 | set extension-language .c c++ | |
3236 | The command `info extensions' lists all of the recognized extensions | |
3237 | and their associated languages. | |
3238 | ||
3239 | * Setting processor type for PowerPC and RS/6000 | |
3240 | ||
3241 | When GDB is configured for a powerpc*-*-* or an rs6000*-*-* target, | |
3242 | you can use the `set processor' command to specify what variant of the | |
3243 | PowerPC family you are debugging. The command | |
3244 | ||
3245 | set processor NAME | |
3246 | ||
3247 | sets the PowerPC/RS6000 variant to NAME. GDB knows about the | |
3248 | following PowerPC and RS6000 variants: | |
3249 | ||
3250 | ppc-uisa PowerPC UISA - a PPC processor as viewed by user-level code | |
3251 | rs6000 IBM RS6000 ("POWER") architecture, user-level view | |
3252 | 403 IBM PowerPC 403 | |
3253 | 403GC IBM PowerPC 403GC | |
3254 | 505 Motorola PowerPC 505 | |
3255 | 860 Motorola PowerPC 860 or 850 | |
3256 | 601 Motorola PowerPC 601 | |
3257 | 602 Motorola PowerPC 602 | |
3258 | 603 Motorola/IBM PowerPC 603 or 603e | |
3259 | 604 Motorola PowerPC 604 or 604e | |
3260 | 750 Motorola/IBM PowerPC 750 or 750 | |
3261 | ||
3262 | At the moment, this command just tells GDB what to name the | |
3263 | special-purpose processor registers. Since almost all the affected | |
3264 | registers are inaccessible to user-level programs, this command is | |
3265 | only useful for remote debugging in its present form. | |
3266 | ||
3267 | * HP-UX support | |
3268 | ||
3269 | Thanks to a major code donation from Hewlett-Packard, GDB now has much | |
3270 | more extensive support for HP-UX. Added features include shared | |
3271 | library support, kernel threads and hardware watchpoints for 11.00, | |
3272 | support for HP's ANSI C and C++ compilers, and a compatibility mode | |
3273 | for xdb and dbx commands. | |
3274 | ||
3275 | * Catchpoints | |
3276 | ||
3277 | HP's donation includes the new concept of catchpoints, which is a | |
3278 | generalization of the old catch command. On HP-UX, it is now possible | |
3279 | to catch exec, fork, and vfork, as well as library loading. | |
3280 | ||
3281 | This means that the existing catch command has changed; its first | |
3282 | argument now specifies the type of catch to be set up. See the | |
3283 | output of "help catch" for a list of catchpoint types. | |
3284 | ||
3285 | * Debugging across forks | |
3286 | ||
3287 | On HP-UX, you can choose which process to debug when a fork() happens | |
3288 | in the inferior. | |
3289 | ||
3290 | * TUI | |
3291 | ||
3292 | HP has donated a curses-based terminal user interface (TUI). To get | |
3293 | it, build with --enable-tui. Although this can be enabled for any | |
3294 | configuration, at present it only works for native HP debugging. | |
3295 | ||
3296 | * GDB remote protocol additions | |
3297 | ||
3298 | A new protocol packet 'X' that writes binary data is now available. | |
3299 | Default behavior is to try 'X', then drop back to 'M' if the stub | |
3300 | fails to respond. The settable variable `remotebinarydownload' | |
3301 | allows explicit control over the use of 'X'. | |
3302 | ||
3303 | For 64-bit targets, the memory packets ('M' and 'm') can now contain a | |
3304 | full 64-bit address. The command | |
3305 | ||
3306 | set remoteaddresssize 32 | |
3307 | ||
3308 | can be used to revert to the old behaviour. For existing remote stubs | |
3309 | the change should not be noticed, as the additional address information | |
3310 | will be discarded. | |
3311 | ||
3312 | In order to assist in debugging stubs, you may use the maintenance | |
3313 | command `packet' to send any text string to the stub. For instance, | |
3314 | ||
3315 | maint packet heythere | |
3316 | ||
3317 | sends the packet "$heythere#<checksum>". Note that it is very easy to | |
3318 | disrupt a debugging session by sending the wrong packet at the wrong | |
3319 | time. | |
3320 | ||
3321 | The compare-sections command allows you to compare section data on the | |
3322 | target to what is in the executable file without uploading or | |
3323 | downloading, by comparing CRC checksums. | |
3324 | ||
3325 | * Tracing can collect general expressions | |
3326 | ||
3327 | You may now collect general expressions at tracepoints. This requires | |
3328 | further additions to the target-side stub; see tracepoint.c and | |
3329 | doc/agentexpr.texi for further details. | |
3330 | ||
3331 | * mask-address variable for Mips | |
3332 | ||
3333 | For Mips targets, you may control the zeroing of the upper 32 bits of | |
3334 | a 64-bit address by entering `set mask-address on'. This is mainly | |
3335 | of interest to users of embedded R4xxx and R5xxx processors. | |
3336 | ||
3337 | * Higher serial baud rates | |
3338 | ||
3339 | GDB's serial code now allows you to specify baud rates 57600, 115200, | |
3340 | 230400, and 460800 baud. (Note that your host system may not be able | |
3341 | to achieve all of these rates.) | |
3342 | ||
3343 | * i960 simulator | |
3344 | ||
3345 | The i960 configuration now includes an initial implementation of a | |
3346 | builtin simulator, contributed by Jim Wilson. | |
3347 | ||
3348 | ||
3349 | *** Changes in GDB-4.17: | |
3350 | ||
3351 | * New native configurations | |
3352 | ||
3353 | Alpha GNU/Linux alpha*-*-linux* | |
3354 | Unixware 2.x i[3456]86-unixware2* | |
3355 | Irix 6.x mips*-sgi-irix6* | |
3356 | PowerPC GNU/Linux powerpc-*-linux* | |
3357 | PowerPC Solaris powerpcle-*-solaris* | |
3358 | Sparc GNU/Linux sparc-*-linux* | |
3359 | Motorola sysV68 R3V7.1 m68k-motorola-sysv | |
3360 | ||
3361 | * New targets | |
3362 | ||
3363 | Argonaut Risc Chip (ARC) arc-*-* | |
3364 | Hitachi H8/300S h8300*-*-* | |
3365 | Matsushita MN10200 w/simulator mn10200-*-* | |
3366 | Matsushita MN10300 w/simulator mn10300-*-* | |
3367 | MIPS NEC VR4100 mips64*vr4100*{,el}-*-elf* | |
3368 | MIPS NEC VR5000 mips64*vr5000*{,el}-*-elf* | |
3369 | MIPS Toshiba TX39 mips64*tx39*{,el}-*-elf* | |
3370 | Mitsubishi D10V w/simulator d10v-*-* | |
3371 | Mitsubishi M32R/D w/simulator m32r-*-elf* | |
3372 | Tsqware Sparclet sparclet-*-* | |
3373 | NEC V850 w/simulator v850-*-* | |
3374 | ||
3375 | * New debugging protocols | |
3376 | ||
3377 | ARM with RDI protocol arm*-*-* | |
3378 | M68K with dBUG monitor m68*-*-{aout,coff,elf} | |
3379 | DDB and LSI variants of PMON protocol mips*-*-* | |
3380 | PowerPC with DINK32 monitor powerpc{,le}-*-eabi | |
3381 | PowerPC with SDS protocol powerpc{,le}-*-eabi | |
3382 | Macraigor OCD (Wiggler) devices powerpc{,le}-*-eabi | |
3383 | ||
3384 | * DWARF 2 | |
3385 | ||
3386 | All configurations can now understand and use the DWARF 2 debugging | |
3387 | format. The choice is automatic, if the symbol file contains DWARF 2 | |
3388 | information. | |
3389 | ||
3390 | * Java frontend | |
3391 | ||
3392 | GDB now includes basic Java language support. This support is | |
3393 | only useful with Java compilers that produce native machine code. | |
3394 | ||
3395 | * solib-absolute-prefix and solib-search-path | |
3396 | ||
3397 | For SunOS and SVR4 shared libraries, you may now set the prefix for | |
3398 | loading absolute shared library symbol files, and the search path for | |
3399 | locating non-absolute shared library symbol files. | |
3400 | ||
3401 | * Live range splitting | |
3402 | ||
3403 | GDB can now effectively debug code for which GCC has performed live | |
3404 | range splitting as part of its optimization. See gdb/doc/LRS for | |
3405 | more details on the expected format of the stabs information. | |
3406 | ||
3407 | * Hurd support | |
3408 | ||
3409 | GDB's support for the GNU Hurd, including thread debugging, has been | |
3410 | updated to work with current versions of the Hurd. | |
3411 | ||
3412 | * ARM Thumb support | |
3413 | ||
3414 | GDB's ARM target configuration now handles the ARM7T (Thumb) 16-bit | |
3415 | instruction set. ARM GDB automatically detects when Thumb | |
3416 | instructions are in use, and adjusts disassembly and backtracing | |
3417 | accordingly. | |
3418 | ||
3419 | * MIPS16 support | |
3420 | ||
3421 | GDB's MIPS target configurations now handle the MIP16 16-bit | |
3422 | instruction set. | |
3423 | ||
3424 | * Overlay support | |
3425 | ||
3426 | GDB now includes support for overlays; if an executable has been | |
3427 | linked such that multiple sections are based at the same address, GDB | |
3428 | will decide which section to use for symbolic info. You can choose to | |
3429 | control the decision manually, using overlay commands, or implement | |
3430 | additional target-side support and use "overlay load-target" to bring | |
3431 | in the overlay mapping. Do "help overlay" for more detail. | |
3432 | ||
3433 | * info symbol | |
3434 | ||
3435 | The command "info symbol <address>" displays information about | |
3436 | the symbol at the specified address. | |
3437 | ||
3438 | * Trace support | |
3439 | ||
3440 | The standard remote protocol now includes an extension that allows | |
3441 | asynchronous collection and display of trace data. This requires | |
3442 | extensive support in the target-side debugging stub. Tracing mode | |
3443 | includes a new interaction mode in GDB and new commands: see the | |
3444 | file tracepoint.c for more details. | |
3445 | ||
3446 | * MIPS simulator | |
3447 | ||
3448 | Configurations for embedded MIPS now include a simulator contributed | |
3449 | by Cygnus Solutions. The simulator supports the instruction sets | |
3450 | of most MIPS variants. | |
3451 | ||
3452 | * Sparc simulator | |
3453 | ||
3454 | Sparc configurations may now include the ERC32 simulator contributed | |
3455 | by the European Space Agency. The simulator is not built into | |
3456 | Sparc targets by default; configure with --enable-sim to include it. | |
3457 | ||
3458 | * set architecture | |
3459 | ||
3460 | For target configurations that may include multiple variants of a | |
3461 | basic architecture (such as MIPS and SH), you may now set the | |
3462 | architecture explicitly. "set arch" sets, "info arch" lists | |
3463 | the possible architectures. | |
3464 | ||
3465 | *** Changes in GDB-4.16: | |
3466 | ||
3467 | * New native configurations | |
3468 | ||
3469 | Windows 95, x86 Windows NT i[345]86-*-cygwin32 | |
3470 | M68K NetBSD m68k-*-netbsd* | |
3471 | PowerPC AIX 4.x powerpc-*-aix* | |
3472 | PowerPC MacOS powerpc-*-macos* | |
3473 | PowerPC Windows NT powerpcle-*-cygwin32 | |
3474 | RS/6000 AIX 4.x rs6000-*-aix4* | |
3475 | ||
3476 | * New targets | |
3477 | ||
3478 | ARM with RDP protocol arm-*-* | |
3479 | I960 with MON960 i960-*-coff | |
3480 | MIPS VxWorks mips*-*-vxworks* | |
3481 | MIPS VR4300 with PMON mips64*vr4300{,el}-*-elf* | |
3482 | PowerPC with PPCBUG monitor powerpc{,le}-*-eabi* | |
3483 | Hitachi SH3 sh-*-* | |
3484 | Matra Sparclet sparclet-*-* | |
3485 | ||
3486 | * PowerPC simulator | |
3487 | ||
3488 | The powerpc-eabi configuration now includes the PSIM simulator, | |
3489 | contributed by Andrew Cagney, with assistance from Mike Meissner. | |
3490 | PSIM is a very elaborate model of the PowerPC, including not only | |
3491 | basic instruction set execution, but also details of execution unit | |
3492 | performance and I/O hardware. See sim/ppc/README for more details. | |
3493 | ||
3494 | * Solaris 2.5 | |
3495 | ||
3496 | GDB now works with Solaris 2.5. | |
3497 | ||
3498 | * Windows 95/NT native | |
3499 | ||
3500 | GDB will now work as a native debugger on Windows 95 and Windows NT. | |
3501 | To build it from source, you must use the "gnu-win32" environment, | |
3502 | which uses a DLL to emulate enough of Unix to run the GNU tools. | |
3503 | Further information, binaries, and sources are available at | |
3504 | ftp.cygnus.com, under pub/gnu-win32. | |
3505 | ||
3506 | * dont-repeat command | |
3507 | ||
3508 | If a user-defined command includes the command `dont-repeat', then the | |
3509 | command will not be repeated if the user just types return. This is | |
3510 | useful if the command is time-consuming to run, so that accidental | |
3511 | extra keystrokes don't run the same command many times. | |
3512 | ||
3513 | * Send break instead of ^C | |
3514 | ||
3515 | The standard remote protocol now includes an option to send a break | |
3516 | rather than a ^C to the target in order to interrupt it. By default, | |
3517 | GDB will send ^C; to send a break, set the variable `remotebreak' to 1. | |
3518 | ||
3519 | * Remote protocol timeout | |
3520 | ||
3521 | The standard remote protocol includes a new variable `remotetimeout' | |
3522 | that allows you to set the number of seconds before GDB gives up trying | |
3523 | to read from the target. The default value is 2. | |
3524 | ||
3525 | * Automatic tracking of dynamic object loading (HPUX and Solaris only) | |
3526 | ||
3527 | By default GDB will automatically keep track of objects as they are | |
3528 | loaded and unloaded by the dynamic linker. By using the command `set | |
3529 | stop-on-solib-events 1' you can arrange for GDB to stop the inferior | |
3530 | when shared library events occur, thus allowing you to set breakpoints | |
3531 | in shared libraries which are explicitly loaded by the inferior. | |
3532 | ||
3533 | Note this feature does not work on hpux8. On hpux9 you must link | |
3534 | /usr/lib/end.o into your program. This feature should work | |
3535 | automatically on hpux10. | |
3536 | ||
3537 | * Irix 5.x hardware watchpoint support | |
3538 | ||
3539 | Irix 5 configurations now support the use of hardware watchpoints. | |
3540 | ||
3541 | * Mips protocol "SYN garbage limit" | |
3542 | ||
3543 | When debugging a Mips target using the `target mips' protocol, you | |
3544 | may set the number of characters that GDB will ignore by setting | |
3545 | the `syn-garbage-limit'. A value of -1 means that GDB will ignore | |
3546 | every character. The default value is 1050. | |
3547 | ||
3548 | * Recording and replaying remote debug sessions | |
3549 | ||
3550 | If you set `remotelogfile' to the name of a file, gdb will write to it | |
3551 | a recording of a remote debug session. This recording may then be | |
3552 | replayed back to gdb using "gdbreplay". See gdbserver/README for | |
3553 | details. This is useful when you have a problem with GDB while doing | |
3554 | remote debugging; you can make a recording of the session and send it | |
3555 | to someone else, who can then recreate the problem. | |
3556 | ||
3557 | * Speedups for remote debugging | |
3558 | ||
3559 | GDB includes speedups for downloading and stepping MIPS systems using | |
3560 | the IDT monitor, fast downloads to the Hitachi SH E7000 emulator, | |
3561 | and more efficient S-record downloading. | |
3562 | ||
3563 | * Memory use reductions and statistics collection | |
3564 | ||
3565 | GDB now uses less memory and reports statistics about memory usage. | |
3566 | Try the `maint print statistics' command, for example. | |
3567 | ||
3568 | *** Changes in GDB-4.15: | |
3569 | ||
3570 | * Psymtabs for XCOFF | |
3571 | ||
3572 | The symbol reader for AIX GDB now uses partial symbol tables. This | |
3573 | can greatly improve startup time, especially for large executables. | |
3574 | ||
3575 | * Remote targets use caching | |
3576 | ||
3577 | Remote targets now use a data cache to speed up communication with the | |
3578 | remote side. The data cache could lead to incorrect results because | |
3579 | it doesn't know about volatile variables, thus making it impossible to | |
3580 | debug targets which use memory mapped I/O devices. `set remotecache | |
3581 | off' turns the the data cache off. | |
3582 | ||
3583 | * Remote targets may have threads | |
3584 | ||
3585 | The standard remote protocol now includes support for multiple threads | |
3586 | in the target system, using new protocol commands 'H' and 'T'. See | |
3587 | gdb/remote.c for details. | |
3588 | ||
3589 | * NetROM support | |
3590 | ||
3591 | If GDB is configured with `--enable-netrom', then it will include | |
3592 | support for the NetROM ROM emulator from XLNT Designs. The NetROM | |
3593 | acts as though it is a bank of ROM on the target board, but you can | |
3594 | write into it over the network. GDB's support consists only of | |
3595 | support for fast loading into the emulated ROM; to debug, you must use | |
3596 | another protocol, such as standard remote protocol. The usual | |
3597 | sequence is something like | |
3598 | ||
3599 | target nrom <netrom-hostname> | |
3600 | load <prog> | |
3601 | target remote <netrom-hostname>:1235 | |
3602 | ||
3603 | * Macintosh host | |
3604 | ||
3605 | GDB now includes support for the Apple Macintosh, as a host only. It | |
3606 | may be run as either an MPW tool or as a standalone application, and | |
3607 | it can debug through the serial port. All the usual GDB commands are | |
3608 | available, but to the target command, you must supply "serial" as the | |
3609 | device type instead of "/dev/ttyXX". See mpw-README in the main | |
3610 | directory for more information on how to build. The MPW configuration | |
3611 | scripts */mpw-config.in support only a few targets, and only the | |
3612 | mips-idt-ecoff target has been tested. | |
3613 | ||
3614 | * Autoconf | |
3615 | ||
3616 | GDB configuration now uses autoconf. This is not user-visible, | |
3617 | but does simplify configuration and building. | |
3618 | ||
3619 | * hpux10 | |
3620 | ||
3621 | GDB now supports hpux10. | |
3622 | ||
3623 | *** Changes in GDB-4.14: | |
3624 | ||
3625 | * New native configurations | |
3626 | ||
3627 | x86 FreeBSD i[345]86-*-freebsd | |
3628 | x86 NetBSD i[345]86-*-netbsd | |
3629 | NS32k NetBSD ns32k-*-netbsd | |
3630 | Sparc NetBSD sparc-*-netbsd | |
3631 | ||
3632 | * New targets | |
3633 | ||
3634 | A29K VxWorks a29k-*-vxworks | |
3635 | HP PA PRO embedded (WinBond W89K & Oki OP50N) hppa*-*-pro* | |
3636 | CPU32 EST-300 emulator m68*-*-est* | |
3637 | PowerPC ELF powerpc-*-elf | |
3638 | WDC 65816 w65-*-* | |
3639 | ||
3640 | * Alpha OSF/1 support for procfs | |
3641 | ||
3642 | GDB now supports procfs under OSF/1-2.x and higher, which makes it | |
3643 | possible to attach to running processes. As the mounting of the /proc | |
3644 | filesystem is optional on the Alpha, GDB automatically determines | |
3645 | the availability of /proc during startup. This can lead to problems | |
3646 | if /proc is unmounted after GDB has been started. | |
3647 | ||
3648 | * Arguments to user-defined commands | |
3649 | ||
3650 | User commands may accept up to 10 arguments separated by whitespace. | |
3651 | Arguments are accessed within the user command via $arg0..$arg9. A | |
3652 | trivial example: | |
3653 | define adder | |
3654 | print $arg0 + $arg1 + $arg2 | |
3655 | ||
3656 | To execute the command use: | |
3657 | adder 1 2 3 | |
3658 | ||
3659 | Defines the command "adder" which prints the sum of its three arguments. | |
3660 | Note the arguments are text substitutions, so they may reference variables, | |
3661 | use complex expressions, or even perform inferior function calls. | |
3662 | ||
3663 | * New `if' and `while' commands | |
3664 | ||
3665 | This makes it possible to write more sophisticated user-defined | |
3666 | commands. Both commands take a single argument, which is the | |
3667 | expression to evaluate, and must be followed by the commands to | |
3668 | execute, one per line, if the expression is nonzero, the list being | |
3669 | terminated by the word `end'. The `if' command list may include an | |
3670 | `else' word, which causes the following commands to be executed only | |
3671 | if the expression is zero. | |
3672 | ||
3673 | * Fortran source language mode | |
3674 | ||
3675 | GDB now includes partial support for Fortran 77. It will recognize | |
3676 | Fortran programs and can evaluate a subset of Fortran expressions, but | |
3677 | variables and functions may not be handled correctly. GDB will work | |
3678 | with G77, but does not yet know much about symbols emitted by other | |
3679 | Fortran compilers. | |
3680 | ||
3681 | * Better HPUX support | |
3682 | ||
3683 | Most debugging facilities now work on dynamic executables for HPPAs | |
3684 | running hpux9 or later. You can attach to running dynamically linked | |
3685 | processes, but by default the dynamic libraries will be read-only, so | |
3686 | for instance you won't be able to put breakpoints in them. To change | |
3687 | that behavior do the following before running the program: | |
3688 | ||
3689 | adb -w a.out | |
3690 | __dld_flags?W 0x5 | |
3691 | control-d | |
3692 | ||
3693 | This will cause the libraries to be mapped private and read-write. | |
3694 | To revert to the normal behavior, do this: | |
3695 | ||
3696 | adb -w a.out | |
3697 | __dld_flags?W 0x4 | |
3698 | control-d | |
3699 | ||
3700 | You cannot set breakpoints or examine data in the library until after | |
3701 | the library is loaded if the function/data symbols do not have | |
3702 | external linkage. | |
3703 | ||
3704 | GDB can now also read debug symbols produced by the HP C compiler on | |
3705 | HPPAs (sorry, no C++, Fortran or 68k support). | |
3706 | ||
3707 | * Target byte order now dynamically selectable | |
3708 | ||
3709 | You can choose which byte order to use with a target system, via the | |
3710 | commands "set endian big" and "set endian little", and you can see the | |
3711 | current setting by using "show endian". You can also give the command | |
3712 | "set endian auto", in which case GDB will use the byte order | |
3713 | associated with the executable. Currently, only embedded MIPS | |
3714 | configurations support dynamic selection of target byte order. | |
3715 | ||
3716 | * New DOS host serial code | |
3717 | ||
3718 | This version uses DPMI interrupts to handle buffered I/O, so you | |
3719 | no longer need to run asynctsr when debugging boards connected to | |
3720 | a PC's serial port. | |
3721 | ||
3722 | *** Changes in GDB-4.13: | |
3723 | ||
3724 | * New "complete" command | |
3725 | ||
3726 | This lists all the possible completions for the rest of the line, if it | |
3727 | were to be given as a command itself. This is intended for use by emacs. | |
3728 | ||
3729 | * Trailing space optional in prompt | |
3730 | ||
3731 | "set prompt" no longer adds a space for you after the prompt you set. This | |
3732 | allows you to set a prompt which ends in a space or one that does not. | |
3733 | ||
3734 | * Breakpoint hit counts | |
3735 | ||
3736 | "info break" now displays a count of the number of times the breakpoint | |
3737 | has been hit. This is especially useful in conjunction with "ignore"; you | |
3738 | can ignore a large number of breakpoint hits, look at the breakpoint info | |
3739 | to see how many times the breakpoint was hit, then run again, ignoring one | |
3740 | less than that number, and this will get you quickly to the last hit of | |
3741 | that breakpoint. | |
3742 | ||
3743 | * Ability to stop printing at NULL character | |
3744 | ||
3745 | "set print null-stop" will cause GDB to stop printing the characters of | |
3746 | an array when the first NULL is encountered. This is useful when large | |
3747 | arrays actually contain only short strings. | |
3748 | ||
3749 | * Shared library breakpoints | |
3750 | ||
3751 | In SunOS 4.x, SVR4, and Alpha OSF/1 configurations, you can now set | |
3752 | breakpoints in shared libraries before the executable is run. | |
3753 | ||
3754 | * Hardware watchpoints | |
3755 | ||
3756 | There is a new hardware breakpoint for the watch command for sparclite | |
3757 | targets. See gdb/sparclite/hw_breakpoint.note. | |
3758 | ||
55241689 | 3759 | Hardware watchpoints are also now supported under GNU/Linux. |
c906108c SS |
3760 | |
3761 | * Annotations | |
3762 | ||
3763 | Annotations have been added. These are for use with graphical interfaces, | |
3764 | and are still experimental. Currently only gdba.el uses these. | |
3765 | ||
3766 | * Improved Irix 5 support | |
3767 | ||
3768 | GDB now works properly with Irix 5.2. | |
3769 | ||
3770 | * Improved HPPA support | |
3771 | ||
3772 | GDB now works properly with the latest GCC and GAS. | |
3773 | ||
3774 | * New native configurations | |
3775 | ||
3776 | Sequent PTX4 i[34]86-sequent-ptx4 | |
3777 | HPPA running OSF/1 hppa*-*-osf* | |
3778 | Atari TT running SVR4 m68*-*-sysv4* | |
3779 | RS/6000 LynxOS rs6000-*-lynxos* | |
3780 | ||
3781 | * New targets | |
3782 | ||
3783 | OS/9000 i[34]86-*-os9k | |
3784 | MIPS R4000 mips64*{,el}-*-{ecoff,elf} | |
3785 | Sparc64 sparc64-*-* | |
3786 | ||
3787 | * Hitachi SH7000 and E7000-PC ICE support | |
3788 | ||
3789 | There is now support for communicating with the Hitachi E7000-PC ICE. | |
3790 | This is available automatically when GDB is configured for the SH. | |
3791 | ||
3792 | * Fixes | |
3793 | ||
3794 | As usual, a variety of small fixes and improvements, both generic | |
3795 | and configuration-specific. See the ChangeLog for more detail. | |
3796 | ||
3797 | *** Changes in GDB-4.12: | |
3798 | ||
3799 | * Irix 5 is now supported | |
3800 | ||
3801 | * HPPA support | |
3802 | ||
3803 | GDB-4.12 on the HPPA has a number of changes which make it unable | |
3804 | to debug the output from the currently released versions of GCC and | |
3805 | GAS (GCC 2.5.8 and GAS-2.2 or PAGAS-1.36). Until the next major release | |
3806 | of GCC and GAS, versions of these tools designed to work with GDB-4.12 | |
3807 | can be retrieved via anonymous ftp from jaguar.cs.utah.edu:/dist. | |
3808 | ||
3809 | ||
3810 | *** Changes in GDB-4.11: | |
3811 | ||
3812 | * User visible changes: | |
3813 | ||
3814 | * Remote Debugging | |
3815 | ||
3816 | The "set remotedebug" option is now consistent between the mips remote | |
3817 | target, remote targets using the gdb-specific protocol, UDI (AMD's | |
3818 | debug protocol for the 29k) and the 88k bug monitor. It is now an | |
3819 | integer specifying a debug level (normally 0 or 1, but 2 means more | |
3820 | debugging info for the mips target). | |
3821 | ||
3822 | * DEC Alpha native support | |
3823 | ||
3824 | GDB now works on the DEC Alpha. GCC 2.4.5 does not produce usable | |
3825 | debug info, but GDB works fairly well with the DEC compiler and should | |
3826 | work with a future GCC release. See the README file for a few | |
3827 | Alpha-specific notes. | |
3828 | ||
3829 | * Preliminary thread implementation | |
3830 | ||
3831 | GDB now has preliminary thread support for both SGI/Irix and LynxOS. | |
3832 | ||
3833 | * LynxOS native and target support for 386 | |
3834 | ||
3835 | This release has been hosted on LynxOS 2.2, and also can be configured | |
3836 | to remotely debug programs running under LynxOS (see gdb/gdbserver/README | |
3837 | for details). | |
3838 | ||
3839 | * Improvements in C++ mangling/demangling. | |
3840 | ||
3841 | This release has much better g++ debugging, specifically in name | |
3842 | mangling/demangling, virtual function calls, print virtual table, | |
3843 | call methods, ...etc. | |
3844 | ||
3845 | *** Changes in GDB-4.10: | |
3846 | ||
3847 | * User visible changes: | |
3848 | ||
3849 | Remote debugging using the GDB-specific (`target remote') protocol now | |
3850 | supports the `load' command. This is only useful if you have some | |
3851 | other way of getting the stub to the target system, and you can put it | |
3852 | somewhere in memory where it won't get clobbered by the download. | |
3853 | ||
3854 | Filename completion now works. | |
3855 | ||
3856 | When run under emacs mode, the "info line" command now causes the | |
3857 | arrow to point to the line specified. Also, "info line" prints | |
3858 | addresses in symbolic form (as well as hex). | |
3859 | ||
3860 | All vxworks based targets now support a user settable option, called | |
3861 | vxworks-timeout. This option represents the number of seconds gdb | |
3862 | should wait for responses to rpc's. You might want to use this if | |
3863 | your vxworks target is, perhaps, a slow software simulator or happens | |
3864 | to be on the far side of a thin network line. | |
3865 | ||
3866 | * DEC alpha support | |
3867 | ||
3868 | This release contains support for using a DEC alpha as a GDB host for | |
3869 | cross debugging. Native alpha debugging is not supported yet. | |
3870 | ||
3871 | ||
3872 | *** Changes in GDB-4.9: | |
3873 | ||
3874 | * Testsuite | |
3875 | ||
3876 | This is the first GDB release which is accompanied by a matching testsuite. | |
3877 | The testsuite requires installation of dejagnu, which should be available | |
3878 | via ftp from most sites that carry GNU software. | |
3879 | ||
3880 | * C++ demangling | |
3881 | ||
3882 | 'Cfront' style demangling has had its name changed to 'ARM' style, to | |
3883 | emphasize that it was written from the specifications in the C++ Annotated | |
3884 | Reference Manual, not necessarily to be compatible with AT&T cfront. Despite | |
3885 | disclaimers, it still generated too much confusion with users attempting to | |
3886 | use gdb with AT&T cfront. | |
3887 | ||
3888 | * Simulators | |
3889 | ||
3890 | GDB now uses a standard remote interface to a simulator library. | |
3891 | So far, the library contains simulators for the Zilog Z8001/2, the | |
3892 | Hitachi H8/300, H8/500 and Super-H. | |
3893 | ||
3894 | * New targets supported | |
3895 | ||
3896 | H8/300 simulator h8300-hitachi-hms or h8300hms | |
3897 | H8/500 simulator h8500-hitachi-hms or h8500hms | |
3898 | SH simulator sh-hitachi-hms or sh | |
3899 | Z8000 simulator z8k-zilog-none or z8ksim | |
3900 | IDT MIPS board over serial line mips-idt-ecoff | |
3901 | ||
3902 | Cross-debugging to GO32 targets is supported. It requires a custom | |
3903 | version of the i386-stub.c module which is integrated with the | |
3904 | GO32 memory extender. | |
3905 | ||
3906 | * New remote protocols | |
3907 | ||
3908 | MIPS remote debugging protocol. | |
3909 | ||
3910 | * New source languages supported | |
3911 | ||
3912 | This version includes preliminary support for Chill, a Pascal like language | |
3913 | used by telecommunications companies. Chill support is also being integrated | |
3914 | into the GNU compiler, but we don't know when it will be publically available. | |
3915 | ||
3916 | ||
3917 | *** Changes in GDB-4.8: | |
3918 | ||
3919 | * HP Precision Architecture supported | |
3920 | ||
3921 | GDB now supports HP PA-RISC machines running HPUX. A preliminary | |
3922 | version of this support was available as a set of patches from the | |
3923 | University of Utah. GDB does not support debugging of programs | |
3924 | compiled with the HP compiler, because HP will not document their file | |
3925 | format. Instead, you must use GCC (version 2.3.2 or later) and PA-GAS | |
3926 | (as available from jaguar.cs.utah.edu:/dist/pa-gas.u4.tar.Z). | |
3927 | ||
3928 | Many problems in the preliminary version have been fixed. | |
3929 | ||
3930 | * Faster and better demangling | |
3931 | ||
3932 | We have improved template demangling and fixed numerous bugs in the GNU style | |
3933 | demangler. It can now handle type modifiers such as `static' or `const'. Wide | |
3934 | character types (wchar_t) are now supported. Demangling of each symbol is now | |
3935 | only done once, and is cached when the symbol table for a file is read in. | |
3936 | This results in a small increase in memory usage for C programs, a moderate | |
3937 | increase in memory usage for C++ programs, and a fantastic speedup in | |
3938 | symbol lookups. | |
3939 | ||
3940 | `Cfront' style demangling still doesn't work with AT&T cfront. It was written | |
3941 | from the specifications in the Annotated Reference Manual, which AT&T's | |
3942 | compiler does not actually implement. | |
3943 | ||
3944 | * G++ multiple inheritance compiler problem | |
3945 | ||
3946 | In the 2.3.2 release of gcc/g++, how the compiler resolves multiple | |
3947 | inheritance lattices was reworked to properly discover ambiguities. We | |
3948 | recently found an example which causes this new algorithm to fail in a | |
3949 | very subtle way, producing bad debug information for those classes. | |
3950 | The file 'gcc.patch' (in this directory) can be applied to gcc to | |
3951 | circumvent the problem. A future GCC release will contain a complete | |
3952 | fix. | |
3953 | ||
3954 | The previous G++ debug info problem (mentioned below for the gdb-4.7 | |
3955 | release) is fixed in gcc version 2.3.2. | |
3956 | ||
3957 | * Improved configure script | |
3958 | ||
3959 | The `configure' script will now attempt to guess your system type if | |
3960 | you don't supply a host system type. The old scheme of supplying a | |
3961 | host system triplet is preferable over using this. All the magic is | |
3962 | done in the new `config.guess' script. Examine it for details. | |
3963 | ||
3964 | We have also brought our configure script much more in line with the FSF's | |
3965 | version. It now supports the --with-xxx options. In particular, | |
3966 | `--with-minimal-bfd' can be used to make the GDB binary image smaller. | |
3967 | The resulting GDB will not be able to read arbitrary object file formats -- | |
3968 | only the format ``expected'' to be used on the configured target system. | |
3969 | We hope to make this the default in a future release. | |
3970 | ||
3971 | * Documentation improvements | |
3972 | ||
3973 | There's new internal documentation on how to modify GDB, and how to | |
3974 | produce clean changes to the code. We implore people to read it | |
3975 | before submitting changes. | |
3976 | ||
3977 | The GDB manual uses new, sexy Texinfo conditionals, rather than arcane | |
3978 | M4 macros. The new texinfo.tex is provided in this release. Pre-built | |
3979 | `info' files are also provided. To build `info' files from scratch, | |
3980 | you will need the latest `makeinfo' release, which will be available in | |
3981 | a future texinfo-X.Y release. | |
3982 | ||
3983 | *NOTE* The new texinfo.tex can cause old versions of TeX to hang. | |
3984 | We're not sure exactly which versions have this problem, but it has | |
3985 | been seen in 3.0. We highly recommend upgrading to TeX version 3.141 | |
3986 | or better. If that isn't possible, there is a patch in | |
3987 | `texinfo/tex3patch' that will modify `texinfo/texinfo.tex' to work | |
3988 | around this problem. | |
3989 | ||
3990 | * New features | |
3991 | ||
3992 | GDB now supports array constants that can be used in expressions typed in by | |
3993 | the user. The syntax is `{element, element, ...}'. Ie: you can now type | |
3994 | `print {1, 2, 3}', and it will build up an array in memory malloc'd in | |
3995 | the target program. | |
3996 | ||
3997 | The new directory `gdb/sparclite' contains a program that demonstrates | |
3998 | how the sparc-stub.c remote stub runs on a Fujitsu SPARClite processor. | |
3999 | ||
4000 | * New native hosts supported | |
4001 | ||
4002 | HP/PA-RISC under HPUX using GNU tools hppa1.1-hp-hpux | |
4003 | 386 CPUs running SCO Unix 3.2v4 i386-unknown-sco3.2v4 | |
4004 | ||
4005 | * New targets supported | |
4006 | ||
4007 | AMD 29k family via UDI a29k-amd-udi or udi29k | |
4008 | ||
4009 | * New file formats supported | |
4010 | ||
4011 | BFD now supports reading HP/PA-RISC executables (SOM file format?), | |
4012 | HPUX core files, and SCO 3.2v2 core files. | |
4013 | ||
4014 | * Major bug fixes | |
4015 | ||
4016 | Attaching to processes now works again; thanks for the many bug reports. | |
4017 | ||
4018 | We have also stomped on a bunch of core dumps caused by | |
4019 | printf_filtered("%s") problems. | |
4020 | ||
4021 | We eliminated a copyright problem on the rpc and ptrace header files | |
4022 | for VxWorks, which was discovered at the last minute during the 4.7 | |
4023 | release. You should now be able to build a VxWorks GDB. | |
4024 | ||
4025 | You can now interrupt gdb while an attached process is running. This | |
4026 | will cause the attached process to stop, and give control back to GDB. | |
4027 | ||
4028 | We fixed problems caused by using too many file descriptors | |
4029 | for reading symbols from object files and libraries. This was | |
4030 | especially a problem for programs that used many (~100) shared | |
4031 | libraries. | |
4032 | ||
4033 | The `step' command now only enters a subroutine if there is line number | |
4034 | information for the subroutine. Otherwise it acts like the `next' | |
4035 | command. Previously, `step' would enter subroutines if there was | |
4036 | any debugging information about the routine. This avoids problems | |
4037 | when using `cc -g1' on MIPS machines. | |
4038 | ||
4039 | * Internal improvements | |
4040 | ||
4041 | GDB's internal interfaces have been improved to make it easier to support | |
4042 | debugging of multiple languages in the future. | |
4043 | ||
4044 | GDB now uses a common structure for symbol information internally. | |
4045 | Minimal symbols (derived from linkage symbols in object files), partial | |
4046 | symbols (from a quick scan of debug information), and full symbols | |
4047 | contain a common subset of information, making it easier to write | |
4048 | shared code that handles any of them. | |
4049 | ||
4050 | * New command line options | |
4051 | ||
4052 | We now accept --silent as an alias for --quiet. | |
4053 | ||
4054 | * Mmalloc licensing | |
4055 | ||
4056 | The memory-mapped-malloc library is now licensed under the GNU Library | |
4057 | General Public License. | |
4058 | ||
4059 | *** Changes in GDB-4.7: | |
4060 | ||
4061 | * Host/native/target split | |
4062 | ||
4063 | GDB has had some major internal surgery to untangle the support for | |
4064 | hosts and remote targets. Now, when you configure GDB for a remote | |
4065 | target, it will no longer load in all of the support for debugging | |
4066 | local programs on the host. When fully completed and tested, this will | |
4067 | ensure that arbitrary host/target combinations are possible. | |
4068 | ||
4069 | The primary conceptual shift is to separate the non-portable code in | |
4070 | GDB into three categories. Host specific code is required any time GDB | |
4071 | is compiled on that host, regardless of the target. Target specific | |
4072 | code relates to the peculiarities of the target, but can be compiled on | |
4073 | any host. Native specific code is everything else: it can only be | |
4074 | built when the host and target are the same system. Child process | |
4075 | handling and core file support are two common `native' examples. | |
4076 | ||
4077 | GDB's use of /proc for controlling Unix child processes is now cleaner. | |
4078 | It has been split out into a single module under the `target_ops' vector, | |
4079 | plus two native-dependent functions for each system that uses /proc. | |
4080 | ||
4081 | * New hosts supported | |
4082 | ||
4083 | HP/Apollo 68k (under the BSD domain) m68k-apollo-bsd or apollo68bsd | |
4084 | 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd | |
4085 | 386 CPUs running SCO Unix i386-unknown-scosysv322 or i386sco | |
4086 | ||
4087 | * New targets supported | |
4088 | ||
4089 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
4090 | 68030 and CPU32 m68030-*-*, m68332-*-* | |
4091 | ||
4092 | * New native hosts supported | |
4093 | ||
4094 | 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd | |
4095 | (386bsd is not well tested yet) | |
4096 | 386 CPUs running SCO Unix i386-unknown-scosysv322 or sco | |
4097 | ||
4098 | * New file formats supported | |
4099 | ||
4100 | BFD now supports COFF files for the Zilog Z8000 microprocessor. It | |
4101 | supports reading of `a.out.adobe' object files, which are an a.out | |
4102 | format extended with minimal information about multiple sections. | |
4103 | ||
4104 | * New commands | |
4105 | ||
4106 | `show copying' is the same as the old `info copying'. | |
4107 | `show warranty' is the same as `info warrantee'. | |
4108 | These were renamed for consistency. The old commands continue to work. | |
4109 | ||
4110 | `info handle' is a new alias for `info signals'. | |
4111 | ||
4112 | You can now define pre-command hooks, which attach arbitrary command | |
4113 | scripts to any command. The commands in the hook will be executed | |
4114 | prior to the user's command. You can also create a hook which will be | |
4115 | executed whenever the program stops. See gdb.texinfo. | |
4116 | ||
4117 | * C++ improvements | |
4118 | ||
4119 | We now deal with Cfront style name mangling, and can even extract type | |
4120 | info from mangled symbols. GDB can automatically figure out which | |
4121 | symbol mangling style your C++ compiler uses. | |
4122 | ||
4123 | Calling of methods and virtual functions has been improved as well. | |
4124 | ||
4125 | * Major bug fixes | |
4126 | ||
4127 | The crash that occured when debugging Sun Ansi-C compiled binaries is | |
4128 | fixed. This was due to mishandling of the extra N_SO stabs output | |
4129 | by the compiler. | |
4130 | ||
4131 | We also finally got Ultrix 4.2 running in house, and fixed core file | |
4132 | support, with help from a dozen people on the net. | |
4133 | ||
4134 | John M. Farrell discovered that the reason that single-stepping was so | |
4135 | slow on all of the Mips based platforms (primarily SGI and DEC) was | |
4136 | that we were trying to demangle and lookup a symbol used for internal | |
4137 | purposes on every instruction that was being stepped through. Changing | |
4138 | the name of that symbol so that it couldn't be mistaken for a C++ | |
4139 | mangled symbol sped things up a great deal. | |
4140 | ||
4141 | Rich Pixley sped up symbol lookups in general by getting much smarter | |
4142 | about when C++ symbol mangling is necessary. This should make symbol | |
4143 | completion (TAB on the command line) much faster. It's not as fast as | |
4144 | we'd like, but it's significantly faster than gdb-4.6. | |
4145 | ||
4146 | * AMD 29k support | |
4147 | ||
4148 | A new user controllable variable 'call_scratch_address' can | |
4149 | specify the location of a scratch area to be used when GDB | |
4150 | calls a function in the target. This is necessary because the | |
4151 | usual method of putting the scratch area on the stack does not work | |
4152 | in systems that have separate instruction and data spaces. | |
4153 | ||
4154 | We integrated changes to support the 29k UDI (Universal Debugger | |
4155 | Interface), but discovered at the last minute that we didn't have all | |
4156 | of the appropriate copyright paperwork. We are working with AMD to | |
4157 | resolve this, and hope to have it available soon. | |
4158 | ||
4159 | * Remote interfaces | |
4160 | ||
4161 | We have sped up the remote serial line protocol, especially for targets | |
4162 | with lots of registers. It now supports a new `expedited status' ('T') | |
4163 | message which can be used in place of the existing 'S' status message. | |
4164 | This allows the remote stub to send only the registers that GDB | |
4165 | needs to make a quick decision about single-stepping or conditional | |
4166 | breakpoints, eliminating the need to fetch the entire register set for | |
4167 | each instruction being stepped through. | |
4168 | ||
4169 | The GDB remote serial protocol now implements a write-through cache for | |
4170 | registers, only re-reading the registers if the target has run. | |
4171 | ||
4172 | There is also a new remote serial stub for SPARC processors. You can | |
4173 | find it in gdb-4.7/gdb/sparc-stub.c. This was written to support the | |
4174 | Fujitsu SPARClite processor, but will run on any stand-alone SPARC | |
4175 | processor with a serial port. | |
4176 | ||
4177 | * Configuration | |
4178 | ||
4179 | Configure.in files have become much easier to read and modify. A new | |
4180 | `table driven' format makes it more obvious what configurations are | |
4181 | supported, and what files each one uses. | |
4182 | ||
4183 | * Library changes | |
4184 | ||
4185 | There is a new opcodes library which will eventually contain all of the | |
4186 | disassembly routines and opcode tables. At present, it only contains | |
4187 | Sparc and Z8000 routines. This will allow the assembler, debugger, and | |
4188 | disassembler (binutils/objdump) to share these routines. | |
4189 | ||
4190 | The libiberty library is now copylefted under the GNU Library General | |
4191 | Public License. This allows more liberal use, and was done so libg++ | |
4192 | can use it. This makes no difference to GDB, since the Library License | |
4193 | grants all the rights from the General Public License. | |
4194 | ||
4195 | * Documentation | |
4196 | ||
4197 | The file gdb-4.7/gdb/doc/stabs.texinfo is a (relatively) complete | |
4198 | reference to the stabs symbol info used by the debugger. It is (as far | |
4199 | as we know) the only published document on this fascinating topic. We | |
4200 | encourage you to read it, compare it to the stabs information on your | |
4201 | system, and send improvements on the document in general (to | |
4202 | bug-gdb@prep.ai.mit.edu). | |
4203 | ||
4204 | And, of course, many bugs have been fixed. | |
4205 | ||
4206 | ||
4207 | *** Changes in GDB-4.6: | |
4208 | ||
4209 | * Better support for C++ function names | |
4210 | ||
4211 | GDB now accepts as input the "demangled form" of C++ overloaded function | |
4212 | names and member function names, and can do command completion on such names | |
4213 | (using TAB, TAB-TAB, and ESC-?). The names have to be quoted with a pair of | |
4214 | single quotes. Examples are 'func (int, long)' and 'obj::operator==(obj&)'. | |
4215 | Make use of command completion, it is your friend. | |
4216 | ||
4217 | GDB also now accepts a variety of C++ mangled symbol formats. They are | |
4218 | the GNU g++ style, the Cfront (ARM) style, and the Lucid (lcc) style. | |
4219 | You can tell GDB which format to use by doing a 'set demangle-style {gnu, | |
4220 | lucid, cfront, auto}'. 'gnu' is the default. Do a 'set demangle-style foo' | |
4221 | for the list of formats. | |
4222 | ||
4223 | * G++ symbol mangling problem | |
4224 | ||
4225 | Recent versions of gcc have a bug in how they emit debugging information for | |
4226 | C++ methods (when using dbx-style stabs). The file 'gcc.patch' (in this | |
4227 | directory) can be applied to gcc to fix the problem. Alternatively, if you | |
4228 | can't fix gcc, you can #define GCC_MANGLE_BUG when compling gdb/symtab.c. The | |
4229 | usual symptom is difficulty with setting breakpoints on methods. GDB complains | |
4230 | about the method being non-existent. (We believe that version 2.2.2 of GCC has | |
4231 | this problem.) | |
4232 | ||
4233 | * New 'maintenance' command | |
4234 | ||
4235 | All of the commands related to hacking GDB internals have been moved out of | |
4236 | the main command set, and now live behind the 'maintenance' command. This | |
4237 | can also be abbreviated as 'mt'. The following changes were made: | |
4238 | ||
4239 | dump-me -> maintenance dump-me | |
4240 | info all-breakpoints -> maintenance info breakpoints | |
4241 | printmsyms -> maintenance print msyms | |
4242 | printobjfiles -> maintenance print objfiles | |
4243 | printpsyms -> maintenance print psymbols | |
4244 | printsyms -> maintenance print symbols | |
4245 | ||
4246 | The following commands are new: | |
4247 | ||
4248 | maintenance demangle Call internal GDB demangler routine to | |
4249 | demangle a C++ link name and prints the result. | |
4250 | maintenance print type Print a type chain for a given symbol | |
4251 | ||
4252 | * Change to .gdbinit file processing | |
4253 | ||
4254 | We now read the $HOME/.gdbinit file before processing the argv arguments | |
4255 | (e.g. reading symbol files or core files). This allows global parameters to | |
4256 | be set, which will apply during the symbol reading. The ./.gdbinit is still | |
4257 | read after argv processing. | |
4258 | ||
4259 | * New hosts supported | |
4260 | ||
4261 | Solaris-2.0 !!! sparc-sun-solaris2 or sun4sol2 | |
4262 | ||
55241689 | 4263 | GNU/Linux support i386-unknown-linux or linux |
c906108c SS |
4264 | |
4265 | We are also including code to support the HP/PA running BSD and HPUX. This | |
4266 | is almost guaranteed not to work, as we didn't have time to test or build it | |
4267 | for this release. We are including it so that the more adventurous (or | |
4268 | masochistic) of you can play with it. We also had major problems with the | |
4269 | fact that the compiler that we got from HP doesn't support the -g option. | |
4270 | It costs extra. | |
4271 | ||
4272 | * New targets supported | |
4273 | ||
4274 | Hitachi H8/300 h8300-hitachi-hms or h8300hms | |
4275 | ||
4276 | * More smarts about finding #include files | |
4277 | ||
4278 | GDB now remembers the compilation directory for all include files, and for | |
4279 | all files from which C is generated (like yacc and lex sources). This | |
4280 | greatly improves GDB's ability to find yacc/lex sources, and include files, | |
4281 | especially if you are debugging your program from a directory different from | |
4282 | the one that contains your sources. | |
4283 | ||
4284 | We also fixed a bug which caused difficulty with listing and setting | |
4285 | breakpoints in include files which contain C code. (In the past, you had to | |
4286 | try twice in order to list an include file that you hadn't looked at before.) | |
4287 | ||
4288 | * Interesting infernals change | |
4289 | ||
4290 | GDB now deals with arbitrary numbers of sections, where the symbols for each | |
4291 | section must be relocated relative to that section's landing place in the | |
4292 | target's address space. This work was needed to support ELF with embedded | |
4293 | stabs used by Solaris-2.0. | |
4294 | ||
4295 | * Bug fixes (of course!) | |
4296 | ||
4297 | There have been loads of fixes for the following things: | |
4298 | mips, rs6000, 29k/udi, m68k, g++, type handling, elf/dwarf, m88k, | |
4299 | i960, stabs, DOS(GO32), procfs, etc... | |
4300 | ||
4301 | See the ChangeLog for details. | |
4302 | ||
4303 | *** Changes in GDB-4.5: | |
4304 | ||
4305 | * New machines supported (host and target) | |
4306 | ||
4307 | IBM RS6000 running AIX rs6000-ibm-aix or rs6000 | |
4308 | ||
4309 | SGI Irix-4.x mips-sgi-irix4 or iris4 | |
4310 | ||
4311 | * New malloc package | |
4312 | ||
4313 | GDB now uses a new memory manager called mmalloc, based on gmalloc. | |
4314 | Mmalloc is capable of handling mutiple heaps of memory. It is also | |
4315 | capable of saving a heap to a file, and then mapping it back in later. | |
4316 | This can be used to greatly speedup the startup of GDB by using a | |
4317 | pre-parsed symbol table which lives in a mmalloc managed heap. For | |
4318 | more details, please read mmalloc/mmalloc.texi. | |
4319 | ||
4320 | * info proc | |
4321 | ||
4322 | The 'info proc' command (SVR4 only) has been enhanced quite a bit. See | |
4323 | 'help info proc' for details. | |
4324 | ||
4325 | * MIPS ecoff symbol table format | |
4326 | ||
4327 | The code that reads MIPS symbol table format is now supported on all hosts. | |
4328 | Thanks to MIPS for releasing the sym.h and symconst.h files to make this | |
4329 | possible. | |
4330 | ||
4331 | * File name changes for MS-DOS | |
4332 | ||
4333 | Many files in the config directories have been renamed to make it easier to | |
4334 | support GDB on MS-DOSe systems (which have very restrictive file name | |
4335 | conventions :-( ). MS-DOSe host support (under DJ Delorie's GO32 | |
4336 | environment) is close to working but has some remaining problems. Note | |
4337 | that debugging of DOS programs is not supported, due to limitations | |
4338 | in the ``operating system'', but it can be used to host cross-debugging. | |
4339 | ||
4340 | * Cross byte order fixes | |
4341 | ||
4342 | Many fixes have been made to support cross debugging of Sparc and MIPS | |
4343 | targets from hosts whose byte order differs. | |
4344 | ||
4345 | * New -mapped and -readnow options | |
4346 | ||
4347 | If memory-mapped files are available on your system through the 'mmap' | |
4348 | system call, you can use the -mapped option on the `file' or | |
4349 | `symbol-file' commands to cause GDB to write the symbols from your | |
4350 | program into a reusable file. If the program you are debugging is | |
4351 | called `/path/fred', the mapped symbol file will be `./fred.syms'. | |
4352 | Future GDB debugging sessions will notice the presence of this file, | |
4353 | and will quickly map in symbol information from it, rather than reading | |
4354 | the symbol table from the executable program. Using the '-mapped' | |
4355 | option in a GDB `file' or `symbol-file' command has the same effect as | |
4356 | starting GDB with the '-mapped' command-line option. | |
4357 | ||
4358 | You can cause GDB to read the entire symbol table immediately by using | |
4359 | the '-readnow' option with any of the commands that load symbol table | |
4360 | information (or on the GDB command line). This makes the command | |
4361 | slower, but makes future operations faster. | |
4362 | ||
4363 | The -mapped and -readnow options are typically combined in order to | |
4364 | build a `fred.syms' file that contains complete symbol information. | |
4365 | A simple GDB invocation to do nothing but build a `.syms' file for future | |
4366 | use is: | |
4367 | ||
4368 | gdb -batch -nx -mapped -readnow programname | |
4369 | ||
4370 | The `.syms' file is specific to the host machine on which GDB is run. | |
4371 | It holds an exact image of GDB's internal symbol table. It cannot be | |
4372 | shared across multiple host platforms. | |
4373 | ||
4374 | * longjmp() handling | |
4375 | ||
4376 | GDB is now capable of stepping and nexting over longjmp(), _longjmp(), and | |
4377 | siglongjmp() without losing control. This feature has not yet been ported to | |
4378 | all systems. It currently works on many 386 platforms, all MIPS-based | |
4379 | platforms (SGI, DECstation, etc), and Sun3/4. | |
4380 | ||
4381 | * Solaris 2.0 | |
4382 | ||
4383 | Preliminary work has been put in to support the new Solaris OS from Sun. At | |
4384 | this time, it can control and debug processes, but it is not capable of | |
4385 | reading symbols. | |
4386 | ||
4387 | * Bug fixes | |
4388 | ||
4389 | As always, many many bug fixes. The major areas were with g++, and mipsread. | |
4390 | People using the MIPS-based platforms should experience fewer mysterious | |
4391 | crashes and trashed symbol tables. | |
4392 | ||
4393 | *** Changes in GDB-4.4: | |
4394 | ||
4395 | * New machines supported (host and target) | |
4396 | ||
4397 | SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco | |
4398 | (except core files) | |
4399 | BSD Reno on Vax vax-dec-bsd | |
4400 | Ultrix on Vax vax-dec-ultrix | |
4401 | ||
4402 | * New machines supported (target) | |
4403 | ||
4404 | AMD 29000 embedded, using EBMON a29k-none-none | |
4405 | ||
4406 | * C++ support | |
4407 | ||
4408 | GDB continues to improve its handling of C++. `References' work better. | |
4409 | The demangler has also been improved, and now deals with symbols mangled as | |
4410 | per the Annotated C++ Reference Guide. | |
4411 | ||
4412 | GDB also now handles `stabs' symbol information embedded in MIPS | |
4413 | `ecoff' symbol tables. Since the ecoff format was not easily | |
4414 | extensible to handle new languages such as C++, this appeared to be a | |
4415 | good way to put C++ debugging info into MIPS binaries. This option | |
4416 | will be supported in the GNU C compiler, version 2, when it is | |
4417 | released. | |
4418 | ||
4419 | * New features for SVR4 | |
4420 | ||
4421 | GDB now handles SVR4 shared libraries, in the same fashion as SunOS | |
4422 | shared libraries. Debugging dynamically linked programs should present | |
4423 | only minor differences from debugging statically linked programs. | |
4424 | ||
4425 | The `info proc' command will print out information about any process | |
4426 | on an SVR4 system (including the one you are debugging). At the moment, | |
4427 | it prints the address mappings of the process. | |
4428 | ||
4429 | If you bring up GDB on another SVR4 system, please send mail to | |
4430 | bug-gdb@prep.ai.mit.edu to let us know what changes were reqired (if any). | |
4431 | ||
4432 | * Better dynamic linking support in SunOS | |
4433 | ||
4434 | Reading symbols from shared libraries which contain debugging symbols | |
4435 | now works properly. However, there remain issues such as automatic | |
4436 | skipping of `transfer vector' code during function calls, which | |
4437 | make it harder to debug code in a shared library, than to debug the | |
4438 | same code linked statically. | |
4439 | ||
4440 | * New Getopt | |
4441 | ||
4442 | GDB is now using the latest `getopt' routines from the FSF. This | |
4443 | version accepts the -- prefix for options with long names. GDB will | |
4444 | continue to accept the old forms (-option and +option) as well. | |
4445 | Various single letter abbreviations for options have been explicity | |
4446 | added to the option table so that they won't get overshadowed in the | |
4447 | future by other options that begin with the same letter. | |
4448 | ||
4449 | * Bugs fixed | |
4450 | ||
4451 | The `cleanup_undefined_types' bug that many of you noticed has been squashed. | |
4452 | Many assorted bugs have been handled. Many more remain to be handled. | |
4453 | See the various ChangeLog files (primarily in gdb and bfd) for details. | |
4454 | ||
4455 | ||
4456 | *** Changes in GDB-4.3: | |
4457 | ||
4458 | * New machines supported (host and target) | |
4459 | ||
4460 | Amiga 3000 running Amix m68k-cbm-svr4 or amix | |
4461 | NCR 3000 386 running SVR4 i386-ncr-svr4 or ncr3000 | |
4462 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 | |
4463 | ||
4464 | * Almost SCO Unix support | |
4465 | ||
4466 | We had hoped to support: | |
4467 | SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco | |
4468 | (except for core file support), but we discovered very late in the release | |
4469 | that it has problems with process groups that render gdb unusable. Sorry | |
4470 | about that. I encourage people to fix it and post the fixes. | |
4471 | ||
4472 | * Preliminary ELF and DWARF support | |
4473 | ||
4474 | GDB can read ELF object files on System V Release 4, and can handle | |
4475 | debugging records for C, in DWARF format, in ELF files. This support | |
4476 | is preliminary. If you bring up GDB on another SVR4 system, please | |
4477 | send mail to bug-gdb@prep.ai.mit.edu to let us know what changes were | |
4478 | reqired (if any). | |
4479 | ||
4480 | * New Readline | |
4481 | ||
4482 | GDB now uses the latest `readline' library. One user-visible change | |
4483 | is that two tabs will list possible command completions, which previously | |
4484 | required typing M-? (meta-question mark, or ESC ?). | |
4485 | ||
4486 | * Bugs fixed | |
4487 | ||
4488 | The `stepi' bug that many of you noticed has been squashed. | |
4489 | Many bugs in C++ have been handled. Many more remain to be handled. | |
4490 | See the various ChangeLog files (primarily in gdb and bfd) for details. | |
4491 | ||
4492 | * State of the MIPS world (in case you wondered): | |
4493 | ||
4494 | GDB can understand the symbol tables emitted by the compilers | |
4495 | supplied by most vendors of MIPS-based machines, including DEC. These | |
4496 | symbol tables are in a format that essentially nobody else uses. | |
4497 | ||
4498 | Some versions of gcc come with an assembler post-processor called | |
4499 | mips-tfile. This program is required if you want to do source-level | |
4500 | debugging of gcc-compiled programs. I believe FSF does not ship | |
4501 | mips-tfile with gcc version 1, but it will eventually come with gcc | |
4502 | version 2. | |
4503 | ||
4504 | Debugging of g++ output remains a problem. g++ version 1.xx does not | |
4505 | really support it at all. (If you're lucky, you should be able to get | |
4506 | line numbers and stack traces to work, but no parameters or local | |
4507 | variables.) With some work it should be possible to improve the | |
4508 | situation somewhat. | |
4509 | ||
4510 | When gcc version 2 is released, you will have somewhat better luck. | |
4511 | However, even then you will get confusing results for inheritance and | |
4512 | methods. | |
4513 | ||
4514 | We will eventually provide full debugging of g++ output on | |
4515 | DECstations. This will probably involve some kind of stabs-in-ecoff | |
4516 | encapulation, but the details have not been worked out yet. | |
4517 | ||
4518 | ||
4519 | *** Changes in GDB-4.2: | |
4520 | ||
4521 | * Improved configuration | |
4522 | ||
4523 | Only one copy of `configure' exists now, and it is not self-modifying. | |
4524 | Porting BFD is simpler. | |
4525 | ||
4526 | * Stepping improved | |
4527 | ||
4528 | The `step' and `next' commands now only stop at the first instruction | |
4529 | of a source line. This prevents the multiple stops that used to occur | |
4530 | in switch statements, for-loops, etc. `Step' continues to stop if a | |
4531 | function that has debugging information is called within the line. | |
4532 | ||
4533 | * Bug fixing | |
4534 | ||
4535 | Lots of small bugs fixed. More remain. | |
4536 | ||
4537 | * New host supported (not target) | |
4538 | ||
4539 | Intel 386 PC clone running Mach i386-none-mach | |
4540 | ||
4541 | ||
4542 | *** Changes in GDB-4.1: | |
4543 | ||
4544 | * Multiple source language support | |
4545 | ||
4546 | GDB now has internal scaffolding to handle several source languages. | |
4547 | It determines the type of each source file from its filename extension, | |
4548 | and will switch expression parsing and number formatting to match the | |
4549 | language of the function in the currently selected stack frame. | |
4550 | You can also specifically set the language to be used, with | |
4551 | `set language c' or `set language modula-2'. | |
4552 | ||
4553 | * GDB and Modula-2 | |
4554 | ||
4555 | GDB now has preliminary support for the GNU Modula-2 compiler, | |
4556 | currently under development at the State University of New York at | |
4557 | Buffalo. Development of both GDB and the GNU Modula-2 compiler will | |
4558 | continue through the fall of 1991 and into 1992. | |
4559 | ||
4560 | Other Modula-2 compilers are currently not supported, and attempting to | |
4561 | debug programs compiled with them will likely result in an error as the | |
4562 | symbol table is read. Feel free to work on it, though! | |
4563 | ||
4564 | There are hooks in GDB for strict type checking and range checking, | |
4565 | in the `Modula-2 philosophy', but they do not currently work. | |
4566 | ||
4567 | * set write on/off | |
4568 | ||
4569 | GDB can now write to executable and core files (e.g. patch | |
4570 | a variable's value). You must turn this switch on, specify | |
4571 | the file ("exec foo" or "core foo"), *then* modify it, e.g. | |
4572 | by assigning a new value to a variable. Modifications take | |
4573 | effect immediately. | |
4574 | ||
4575 | * Automatic SunOS shared library reading | |
4576 | ||
4577 | When you run your program, GDB automatically determines where its | |
4578 | shared libraries (if any) have been loaded, and reads their symbols. | |
4579 | The `share' command is no longer needed. This also works when | |
4580 | examining core files. | |
4581 | ||
4582 | * set listsize | |
4583 | ||
4584 | You can specify the number of lines that the `list' command shows. | |
4585 | The default is 10. | |
4586 | ||
4587 | * New machines supported (host and target) | |
4588 | ||
4589 | SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris | |
4590 | Sony NEWS (68K) running NEWSOS 3.x: m68k-sony-sysv or news | |
4591 | Ultracomputer (29K) running Sym1: a29k-nyu-sym1 or ultra3 | |
4592 | ||
4593 | * New hosts supported (not targets) | |
4594 | ||
4595 | IBM RT/PC: romp-ibm-aix or rtpc | |
4596 | ||
4597 | * New targets supported (not hosts) | |
4598 | ||
4599 | AMD 29000 embedded with COFF a29k-none-coff | |
4600 | AMD 29000 embedded with a.out a29k-none-aout | |
4601 | Ultracomputer remote kernel debug a29k-nyu-kern | |
4602 | ||
4603 | * New remote interfaces | |
4604 | ||
4605 | AMD 29000 Adapt | |
4606 | AMD 29000 Minimon | |
4607 | ||
4608 | ||
4609 | *** Changes in GDB-4.0: | |
4610 | ||
4611 | * New Facilities | |
4612 | ||
4613 | Wide output is wrapped at good places to make the output more readable. | |
4614 | ||
4615 | Gdb now supports cross-debugging from a host machine of one type to a | |
4616 | target machine of another type. Communication with the target system | |
4617 | is over serial lines. The ``target'' command handles connecting to the | |
4618 | remote system; the ``load'' command will download a program into the | |
4619 | remote system. Serial stubs for the m68k and i386 are provided. Gdb | |
4620 | also supports debugging of realtime processes running under VxWorks, | |
4621 | using SunRPC Remote Procedure Calls over TCP/IP to talk to a debugger | |
4622 | stub on the target system. | |
4623 | ||
4624 | New CPUs supported include the AMD 29000 and Intel 960. | |
4625 | ||
4626 | GDB now reads object files and symbol tables via a ``binary file'' | |
4627 | library, which allows a single copy of GDB to debug programs of multiple | |
4628 | object file types such as a.out and coff. | |
4629 | ||
4630 | There is now a GDB reference card in "doc/refcard.tex". (Make targets | |
4631 | refcard.dvi and refcard.ps are available to format it). | |
4632 | ||
4633 | ||
4634 | * Control-Variable user interface simplified | |
4635 | ||
4636 | All variables that control the operation of the debugger can be set | |
4637 | by the ``set'' command, and displayed by the ``show'' command. | |
4638 | ||
4639 | For example, ``set prompt new-gdb=>'' will change your prompt to new-gdb=>. | |
4640 | ``Show prompt'' produces the response: | |
4641 | Gdb's prompt is new-gdb=>. | |
4642 | ||
4643 | What follows are the NEW set commands. The command ``help set'' will | |
4644 | print a complete list of old and new set commands. ``help set FOO'' | |
4645 | will give a longer description of the variable FOO. ``show'' will show | |
4646 | all of the variable descriptions and their current settings. | |
4647 | ||
4648 | confirm on/off: Enables warning questions for operations that are | |
4649 | hard to recover from, e.g. rerunning the program while | |
4650 | it is already running. Default is ON. | |
4651 | ||
4652 | editing on/off: Enables EMACS style command line editing | |
4653 | of input. Previous lines can be recalled with | |
4654 | control-P, the current line can be edited with control-B, | |
4655 | you can search for commands with control-R, etc. | |
4656 | Default is ON. | |
4657 | ||
4658 | history filename NAME: NAME is where the gdb command history | |
4659 | will be stored. The default is .gdb_history, | |
4660 | or the value of the environment variable | |
4661 | GDBHISTFILE. | |
4662 | ||
4663 | history size N: The size, in commands, of the command history. The | |
4664 | default is 256, or the value of the environment variable | |
4665 | HISTSIZE. | |
4666 | ||
4667 | history save on/off: If this value is set to ON, the history file will | |
4668 | be saved after exiting gdb. If set to OFF, the | |
4669 | file will not be saved. The default is OFF. | |
4670 | ||
4671 | history expansion on/off: If this value is set to ON, then csh-like | |
4672 | history expansion will be performed on | |
4673 | command line input. The default is OFF. | |
4674 | ||
4675 | radix N: Sets the default radix for input and output. It can be set | |
4676 | to 8, 10, or 16. Note that the argument to "radix" is interpreted | |
4677 | in the current radix, so "set radix 10" is always a no-op. | |
4678 | ||
4679 | height N: This integer value is the number of lines on a page. Default | |
4680 | is 24, the current `stty rows'' setting, or the ``li#'' | |
4681 | setting from the termcap entry matching the environment | |
4682 | variable TERM. | |
4683 | ||
4684 | width N: This integer value is the number of characters on a line. | |
4685 | Default is 80, the current `stty cols'' setting, or the ``co#'' | |
4686 | setting from the termcap entry matching the environment | |
4687 | variable TERM. | |
4688 | ||
4689 | Note: ``set screensize'' is obsolete. Use ``set height'' and | |
4690 | ``set width'' instead. | |
4691 | ||
4692 | print address on/off: Print memory addresses in various command displays, | |
4693 | such as stack traces and structure values. Gdb looks | |
4694 | more ``symbolic'' if you turn this off; it looks more | |
4695 | ``machine level'' with it on. Default is ON. | |
4696 | ||
4697 | print array on/off: Prettyprint arrays. New convenient format! Default | |
4698 | is OFF. | |
4699 | ||
4700 | print demangle on/off: Print C++ symbols in "source" form if on, | |
4701 | "raw" form if off. | |
4702 | ||
4703 | print asm-demangle on/off: Same, for assembler level printouts | |
4704 | like instructions. | |
4705 | ||
4706 | print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF. | |
4707 | ||
4708 | ||
4709 | * Support for Epoch Environment. | |
4710 | ||
4711 | The epoch environment is a version of Emacs v18 with windowing. One | |
4712 | new command, ``inspect'', is identical to ``print'', except that if you | |
4713 | are running in the epoch environment, the value is printed in its own | |
4714 | window. | |
4715 | ||
4716 | ||
4717 | * Support for Shared Libraries | |
4718 | ||
4719 | GDB can now debug programs and core files that use SunOS shared libraries. | |
4720 | Symbols from a shared library cannot be referenced | |
4721 | before the shared library has been linked with the program (this | |
4722 | happens after you type ``run'' and before the function main() is entered). | |
4723 | At any time after this linking (including when examining core files | |
4724 | from dynamically linked programs), gdb reads the symbols from each | |
4725 | shared library when you type the ``sharedlibrary'' command. | |
4726 | It can be abbreviated ``share''. | |
4727 | ||
4728 | sharedlibrary REGEXP: Load shared object library symbols for files | |
4729 | matching a unix regular expression. No argument | |
4730 | indicates to load symbols for all shared libraries. | |
4731 | ||
4732 | info sharedlibrary: Status of loaded shared libraries. | |
4733 | ||
4734 | ||
4735 | * Watchpoints | |
4736 | ||
4737 | A watchpoint stops execution of a program whenever the value of an | |
4738 | expression changes. Checking for this slows down execution | |
4739 | tremendously whenever you are in the scope of the expression, but is | |
4740 | quite useful for catching tough ``bit-spreader'' or pointer misuse | |
4741 | problems. Some machines such as the 386 have hardware for doing this | |
4742 | more quickly, and future versions of gdb will use this hardware. | |
4743 | ||
4744 | watch EXP: Set a watchpoint (breakpoint) for an expression. | |
4745 | ||
4746 | info watchpoints: Information about your watchpoints. | |
4747 | ||
4748 | delete N: Deletes watchpoint number N (same as breakpoints). | |
4749 | disable N: Temporarily turns off watchpoint number N (same as breakpoints). | |
4750 | enable N: Re-enables watchpoint number N (same as breakpoints). | |
4751 | ||
4752 | ||
4753 | * C++ multiple inheritance | |
4754 | ||
4755 | When used with a GCC version 2 compiler, GDB supports multiple inheritance | |
4756 | for C++ programs. | |
4757 | ||
4758 | * C++ exception handling | |
4759 | ||
4760 | Gdb now supports limited C++ exception handling. Besides the existing | |
4761 | ability to breakpoint on an exception handler, gdb can breakpoint on | |
4762 | the raising of an exception (before the stack is peeled back to the | |
4763 | handler's context). | |
4764 | ||
4765 | catch FOO: If there is a FOO exception handler in the dynamic scope, | |
4766 | set a breakpoint to catch exceptions which may be raised there. | |
4767 | Multiple exceptions (``catch foo bar baz'') may be caught. | |
4768 | ||
4769 | info catch: Lists all exceptions which may be caught in the | |
4770 | current stack frame. | |
4771 | ||
4772 | ||
4773 | * Minor command changes | |
4774 | ||
4775 | The command ``call func (arg, arg, ...)'' now acts like the print | |
4776 | command, except it does not print or save a value if the function's result | |
4777 | is void. This is similar to dbx usage. | |
4778 | ||
4779 | The ``up'' and ``down'' commands now always print the frame they end up | |
4780 | at; ``up-silently'' and `down-silently'' can be used in scripts to change | |
4781 | frames without printing. | |
4782 | ||
4783 | * New directory command | |
4784 | ||
4785 | 'dir' now adds directories to the FRONT of the source search path. | |
4786 | The path starts off empty. Source files that contain debug information | |
4787 | about the directory in which they were compiled can be found even | |
4788 | with an empty path; Sun CC and GCC include this information. If GDB can't | |
4789 | find your source file in the current directory, type "dir .". | |
4790 | ||
4791 | * Configuring GDB for compilation | |
4792 | ||
4793 | For normal use, type ``./configure host''. See README or gdb.texinfo | |
4794 | for more details. | |
4795 | ||
4796 | GDB now handles cross debugging. If you are remotely debugging between | |
4797 | two different machines, type ``./configure host -target=targ''. | |
4798 | Host is the machine where GDB will run; targ is the machine | |
4799 | where the program that you are debugging will run. |