| 1 | /* Data structures associated with breakpoints in GDB. |
| 2 | Copyright (C) 1992-2015 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #if !defined (BREAKPOINT_H) |
| 20 | #define BREAKPOINT_H 1 |
| 21 | |
| 22 | #include "frame.h" |
| 23 | #include "value.h" |
| 24 | #include "vec.h" |
| 25 | #include "ax.h" |
| 26 | #include "command.h" |
| 27 | #include "break-common.h" |
| 28 | #include "probe.h" |
| 29 | |
| 30 | struct value; |
| 31 | struct block; |
| 32 | struct gdbpy_breakpoint_object; |
| 33 | struct gdbscm_breakpoint_object; |
| 34 | struct get_number_or_range_state; |
| 35 | struct thread_info; |
| 36 | struct bpstats; |
| 37 | struct bp_location; |
| 38 | struct linespec_result; |
| 39 | struct linespec_sals; |
| 40 | struct event_location; |
| 41 | |
| 42 | /* This is the maximum number of bytes a breakpoint instruction can |
| 43 | take. Feel free to increase it. It's just used in a few places to |
| 44 | size arrays that should be independent of the target |
| 45 | architecture. */ |
| 46 | |
| 47 | #define BREAKPOINT_MAX 16 |
| 48 | \f |
| 49 | |
| 50 | /* Type of breakpoint. */ |
| 51 | |
| 52 | enum bptype |
| 53 | { |
| 54 | bp_none = 0, /* Eventpoint has been deleted */ |
| 55 | bp_breakpoint, /* Normal breakpoint */ |
| 56 | bp_hardware_breakpoint, /* Hardware assisted breakpoint */ |
| 57 | bp_single_step, /* Software single-step */ |
| 58 | bp_until, /* used by until command */ |
| 59 | bp_finish, /* used by finish command */ |
| 60 | bp_watchpoint, /* Watchpoint */ |
| 61 | bp_hardware_watchpoint, /* Hardware assisted watchpoint */ |
| 62 | bp_read_watchpoint, /* read watchpoint, (hardware assisted) */ |
| 63 | bp_access_watchpoint, /* access watchpoint, (hardware assisted) */ |
| 64 | bp_longjmp, /* secret breakpoint to find longjmp() */ |
| 65 | bp_longjmp_resume, /* secret breakpoint to escape longjmp() */ |
| 66 | |
| 67 | /* Breakpoint placed to the same location(s) like bp_longjmp but used to |
| 68 | protect against stale DUMMY_FRAME. Multiple bp_longjmp_call_dummy and |
| 69 | one bp_call_dummy are chained together by related_breakpoint for each |
| 70 | DUMMY_FRAME. */ |
| 71 | bp_longjmp_call_dummy, |
| 72 | |
| 73 | /* An internal breakpoint that is installed on the unwinder's |
| 74 | debug hook. */ |
| 75 | bp_exception, |
| 76 | /* An internal breakpoint that is set at the point where an |
| 77 | exception will land. */ |
| 78 | bp_exception_resume, |
| 79 | |
| 80 | /* Used by wait_for_inferior for stepping over subroutine calls, |
| 81 | and for skipping prologues. */ |
| 82 | bp_step_resume, |
| 83 | |
| 84 | /* Used by wait_for_inferior for stepping over signal |
| 85 | handlers. */ |
| 86 | bp_hp_step_resume, |
| 87 | |
| 88 | /* Used to detect when a watchpoint expression has gone out of |
| 89 | scope. These breakpoints are usually not visible to the user. |
| 90 | |
| 91 | This breakpoint has some interesting properties: |
| 92 | |
| 93 | 1) There's always a 1:1 mapping between watchpoints |
| 94 | on local variables and watchpoint_scope breakpoints. |
| 95 | |
| 96 | 2) It automatically deletes itself and the watchpoint it's |
| 97 | associated with when hit. |
| 98 | |
| 99 | 3) It can never be disabled. */ |
| 100 | bp_watchpoint_scope, |
| 101 | |
| 102 | /* The breakpoint at the end of a call dummy. See bp_longjmp_call_dummy it |
| 103 | is chained with by related_breakpoint. */ |
| 104 | bp_call_dummy, |
| 105 | |
| 106 | /* A breakpoint set on std::terminate, that is used to catch |
| 107 | otherwise uncaught exceptions thrown during an inferior call. */ |
| 108 | bp_std_terminate, |
| 109 | |
| 110 | /* Some dynamic linkers (HP, maybe Solaris) can arrange for special |
| 111 | code in the inferior to run when significant events occur in the |
| 112 | dynamic linker (for example a library is loaded or unloaded). |
| 113 | |
| 114 | By placing a breakpoint in this magic code GDB will get control |
| 115 | when these significant events occur. GDB can then re-examine |
| 116 | the dynamic linker's data structures to discover any newly loaded |
| 117 | dynamic libraries. */ |
| 118 | bp_shlib_event, |
| 119 | |
| 120 | /* Some multi-threaded systems can arrange for a location in the |
| 121 | inferior to be executed when certain thread-related events occur |
| 122 | (such as thread creation or thread death). |
| 123 | |
| 124 | By placing a breakpoint at one of these locations, GDB will get |
| 125 | control when these events occur. GDB can then update its thread |
| 126 | lists etc. */ |
| 127 | |
| 128 | bp_thread_event, |
| 129 | |
| 130 | /* On the same principal, an overlay manager can arrange to call a |
| 131 | magic location in the inferior whenever there is an interesting |
| 132 | change in overlay status. GDB can update its overlay tables |
| 133 | and fiddle with breakpoints in overlays when this breakpoint |
| 134 | is hit. */ |
| 135 | |
| 136 | bp_overlay_event, |
| 137 | |
| 138 | /* Master copies of longjmp breakpoints. These are always installed |
| 139 | as soon as an objfile containing longjmp is loaded, but they are |
| 140 | always disabled. While necessary, temporary clones of bp_longjmp |
| 141 | type will be created and enabled. */ |
| 142 | |
| 143 | bp_longjmp_master, |
| 144 | |
| 145 | /* Master copies of std::terminate breakpoints. */ |
| 146 | bp_std_terminate_master, |
| 147 | |
| 148 | /* Like bp_longjmp_master, but for exceptions. */ |
| 149 | bp_exception_master, |
| 150 | |
| 151 | bp_catchpoint, |
| 152 | |
| 153 | bp_tracepoint, |
| 154 | bp_fast_tracepoint, |
| 155 | bp_static_tracepoint, |
| 156 | |
| 157 | /* A dynamic printf stops at the given location, does a formatted |
| 158 | print, then automatically continues. (Although this is sort of |
| 159 | like a macro packaging up standard breakpoint functionality, |
| 160 | GDB doesn't have a way to construct types of breakpoint from |
| 161 | elements of behavior.) */ |
| 162 | bp_dprintf, |
| 163 | |
| 164 | /* Event for JIT compiled code generation or deletion. */ |
| 165 | bp_jit_event, |
| 166 | |
| 167 | /* Breakpoint is placed at the STT_GNU_IFUNC resolver. When hit GDB |
| 168 | inserts new bp_gnu_ifunc_resolver_return at the caller. |
| 169 | bp_gnu_ifunc_resolver is still being kept here as a different thread |
| 170 | may still hit it before bp_gnu_ifunc_resolver_return is hit by the |
| 171 | original thread. */ |
| 172 | bp_gnu_ifunc_resolver, |
| 173 | |
| 174 | /* On its hit GDB now know the resolved address of the target |
| 175 | STT_GNU_IFUNC function. Associated bp_gnu_ifunc_resolver can be |
| 176 | deleted now and the breakpoint moved to the target function entry |
| 177 | point. */ |
| 178 | bp_gnu_ifunc_resolver_return, |
| 179 | }; |
| 180 | |
| 181 | /* States of enablement of breakpoint. */ |
| 182 | |
| 183 | enum enable_state |
| 184 | { |
| 185 | bp_disabled, /* The eventpoint is inactive, and cannot |
| 186 | trigger. */ |
| 187 | bp_enabled, /* The eventpoint is active, and can |
| 188 | trigger. */ |
| 189 | bp_call_disabled, /* The eventpoint has been disabled while a |
| 190 | call into the inferior is "in flight", |
| 191 | because some eventpoints interfere with |
| 192 | the implementation of a call on some |
| 193 | targets. The eventpoint will be |
| 194 | automatically enabled and reset when the |
| 195 | call "lands" (either completes, or stops |
| 196 | at another eventpoint). */ |
| 197 | }; |
| 198 | |
| 199 | |
| 200 | /* Disposition of breakpoint. Ie: what to do after hitting it. */ |
| 201 | |
| 202 | enum bpdisp |
| 203 | { |
| 204 | disp_del, /* Delete it */ |
| 205 | disp_del_at_next_stop, /* Delete at next stop, |
| 206 | whether hit or not */ |
| 207 | disp_disable, /* Disable it */ |
| 208 | disp_donttouch /* Leave it alone */ |
| 209 | }; |
| 210 | |
| 211 | /* Status of breakpoint conditions used when synchronizing |
| 212 | conditions with the target. */ |
| 213 | |
| 214 | enum condition_status |
| 215 | { |
| 216 | condition_unchanged = 0, |
| 217 | condition_modified, |
| 218 | condition_updated |
| 219 | }; |
| 220 | |
| 221 | /* Information used by targets to insert and remove breakpoints. */ |
| 222 | |
| 223 | struct bp_target_info |
| 224 | { |
| 225 | /* Address space at which the breakpoint was placed. */ |
| 226 | struct address_space *placed_address_space; |
| 227 | |
| 228 | /* Address at which the breakpoint was placed. This is normally |
| 229 | the same as REQUESTED_ADDRESS, except when adjustment happens in |
| 230 | gdbarch_breakpoint_from_pc. The most common form of adjustment |
| 231 | is stripping an alternate ISA marker from the PC which is used |
| 232 | to determine the type of breakpoint to insert. */ |
| 233 | CORE_ADDR placed_address; |
| 234 | |
| 235 | /* Address at which the breakpoint was requested. */ |
| 236 | CORE_ADDR reqstd_address; |
| 237 | |
| 238 | /* If this is a ranged breakpoint, then this field contains the |
| 239 | length of the range that will be watched for execution. */ |
| 240 | int length; |
| 241 | |
| 242 | /* If the breakpoint lives in memory and reading that memory would |
| 243 | give back the breakpoint, instead of the original contents, then |
| 244 | the original contents are cached here. Only SHADOW_LEN bytes of |
| 245 | this buffer are valid, and only when the breakpoint is inserted. */ |
| 246 | gdb_byte shadow_contents[BREAKPOINT_MAX]; |
| 247 | |
| 248 | /* The length of the data cached in SHADOW_CONTENTS. */ |
| 249 | int shadow_len; |
| 250 | |
| 251 | /* The size of the placed breakpoint, according to |
| 252 | gdbarch_breakpoint_from_pc, when the breakpoint was inserted. |
| 253 | This is generally the same as SHADOW_LEN, unless we did not need |
| 254 | to read from the target to implement the memory breakpoint |
| 255 | (e.g. if a remote stub handled the details). We may still need |
| 256 | the size to remove the breakpoint safely. */ |
| 257 | int placed_size; |
| 258 | |
| 259 | /* Vector of conditions the target should evaluate if it supports target-side |
| 260 | breakpoint conditions. */ |
| 261 | VEC(agent_expr_p) *conditions; |
| 262 | |
| 263 | /* Vector of commands the target should evaluate if it supports |
| 264 | target-side breakpoint commands. */ |
| 265 | VEC(agent_expr_p) *tcommands; |
| 266 | |
| 267 | /* Flag that is true if the breakpoint should be left in place even |
| 268 | when GDB is not connected. */ |
| 269 | int persist; |
| 270 | }; |
| 271 | |
| 272 | /* GDB maintains two types of information about each breakpoint (or |
| 273 | watchpoint, or other related event). The first type corresponds |
| 274 | to struct breakpoint; this is a relatively high-level structure |
| 275 | which contains the source location(s), stopping conditions, user |
| 276 | commands to execute when the breakpoint is hit, and so forth. |
| 277 | |
| 278 | The second type of information corresponds to struct bp_location. |
| 279 | Each breakpoint has one or (eventually) more locations associated |
| 280 | with it, which represent target-specific and machine-specific |
| 281 | mechanisms for stopping the program. For instance, a watchpoint |
| 282 | expression may require multiple hardware watchpoints in order to |
| 283 | catch all changes in the value of the expression being watched. */ |
| 284 | |
| 285 | enum bp_loc_type |
| 286 | { |
| 287 | bp_loc_software_breakpoint, |
| 288 | bp_loc_hardware_breakpoint, |
| 289 | bp_loc_hardware_watchpoint, |
| 290 | bp_loc_other /* Miscellaneous... */ |
| 291 | }; |
| 292 | |
| 293 | /* This structure is a collection of function pointers that, if |
| 294 | available, will be called instead of performing the default action |
| 295 | for this bp_loc_type. */ |
| 296 | |
| 297 | struct bp_location_ops |
| 298 | { |
| 299 | /* Destructor. Releases everything from SELF (but not SELF |
| 300 | itself). */ |
| 301 | void (*dtor) (struct bp_location *self); |
| 302 | }; |
| 303 | |
| 304 | struct bp_location |
| 305 | { |
| 306 | /* Chain pointer to the next breakpoint location for |
| 307 | the same parent breakpoint. */ |
| 308 | struct bp_location *next; |
| 309 | |
| 310 | /* Methods associated with this location. */ |
| 311 | const struct bp_location_ops *ops; |
| 312 | |
| 313 | /* The reference count. */ |
| 314 | int refc; |
| 315 | |
| 316 | /* Type of this breakpoint location. */ |
| 317 | enum bp_loc_type loc_type; |
| 318 | |
| 319 | /* Each breakpoint location must belong to exactly one higher-level |
| 320 | breakpoint. This pointer is NULL iff this bp_location is no |
| 321 | longer attached to a breakpoint. For example, when a breakpoint |
| 322 | is deleted, its locations may still be found in the |
| 323 | moribund_locations list, or if we had stopped for it, in |
| 324 | bpstats. */ |
| 325 | struct breakpoint *owner; |
| 326 | |
| 327 | /* Conditional. Break only if this expression's value is nonzero. |
| 328 | Unlike string form of condition, which is associated with |
| 329 | breakpoint, this is associated with location, since if breakpoint |
| 330 | has several locations, the evaluation of expression can be |
| 331 | different for different locations. Only valid for real |
| 332 | breakpoints; a watchpoint's conditional expression is stored in |
| 333 | the owner breakpoint object. */ |
| 334 | struct expression *cond; |
| 335 | |
| 336 | /* Conditional expression in agent expression |
| 337 | bytecode form. This is used for stub-side breakpoint |
| 338 | condition evaluation. */ |
| 339 | struct agent_expr *cond_bytecode; |
| 340 | |
| 341 | /* Signals that the condition has changed since the last time |
| 342 | we updated the global location list. This means the condition |
| 343 | needs to be sent to the target again. This is used together |
| 344 | with target-side breakpoint conditions. |
| 345 | |
| 346 | condition_unchanged: It means there has been no condition changes. |
| 347 | |
| 348 | condition_modified: It means this location had its condition modified. |
| 349 | |
| 350 | condition_updated: It means we already marked all the locations that are |
| 351 | duplicates of this location and thus we don't need to call |
| 352 | force_breakpoint_reinsertion (...) for this location. */ |
| 353 | |
| 354 | enum condition_status condition_changed; |
| 355 | |
| 356 | struct agent_expr *cmd_bytecode; |
| 357 | |
| 358 | /* Signals that breakpoint conditions and/or commands need to be |
| 359 | re-synched with the target. This has no use other than |
| 360 | target-side breakpoints. */ |
| 361 | char needs_update; |
| 362 | |
| 363 | /* This location's address is in an unloaded solib, and so this |
| 364 | location should not be inserted. It will be automatically |
| 365 | enabled when that solib is loaded. */ |
| 366 | char shlib_disabled; |
| 367 | |
| 368 | /* Is this particular location enabled. */ |
| 369 | char enabled; |
| 370 | |
| 371 | /* Nonzero if this breakpoint is now inserted. */ |
| 372 | char inserted; |
| 373 | |
| 374 | /* Nonzero if this is a permanent breakpoint. There is a breakpoint |
| 375 | instruction hard-wired into the target's code. Don't try to |
| 376 | write another breakpoint instruction on top of it, or restore its |
| 377 | value. Step over it using the architecture's |
| 378 | gdbarch_skip_permanent_breakpoint method. */ |
| 379 | char permanent; |
| 380 | |
| 381 | /* Nonzero if this is not the first breakpoint in the list |
| 382 | for the given address. location of tracepoint can _never_ |
| 383 | be duplicated with other locations of tracepoints and other |
| 384 | kinds of breakpoints, because two locations at the same |
| 385 | address may have different actions, so both of these locations |
| 386 | should be downloaded and so that `tfind N' always works. */ |
| 387 | char duplicate; |
| 388 | |
| 389 | /* If we someday support real thread-specific breakpoints, then |
| 390 | the breakpoint location will need a thread identifier. */ |
| 391 | |
| 392 | /* Data for specific breakpoint types. These could be a union, but |
| 393 | simplicity is more important than memory usage for breakpoints. */ |
| 394 | |
| 395 | /* Architecture associated with this location's address. May be |
| 396 | different from the breakpoint architecture. */ |
| 397 | struct gdbarch *gdbarch; |
| 398 | |
| 399 | /* The program space associated with this breakpoint location |
| 400 | address. Note that an address space may be represented in more |
| 401 | than one program space (e.g. each uClinux program will be given |
| 402 | its own program space, but there will only be one address space |
| 403 | for all of them), but we must not insert more than one location |
| 404 | at the same address in the same address space. */ |
| 405 | struct program_space *pspace; |
| 406 | |
| 407 | /* Note that zero is a perfectly valid code address on some platforms |
| 408 | (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL |
| 409 | is not a special value for this field. Valid for all types except |
| 410 | bp_loc_other. */ |
| 411 | CORE_ADDR address; |
| 412 | |
| 413 | /* For hardware watchpoints, the size of the memory region being |
| 414 | watched. For hardware ranged breakpoints, the size of the |
| 415 | breakpoint range. */ |
| 416 | int length; |
| 417 | |
| 418 | /* Type of hardware watchpoint. */ |
| 419 | enum target_hw_bp_type watchpoint_type; |
| 420 | |
| 421 | /* For any breakpoint type with an address, this is the section |
| 422 | associated with the address. Used primarily for overlay |
| 423 | debugging. */ |
| 424 | struct obj_section *section; |
| 425 | |
| 426 | /* Address at which breakpoint was requested, either by the user or |
| 427 | by GDB for internal breakpoints. This will usually be the same |
| 428 | as ``address'' (above) except for cases in which |
| 429 | ADJUST_BREAKPOINT_ADDRESS has computed a different address at |
| 430 | which to place the breakpoint in order to comply with a |
| 431 | processor's architectual constraints. */ |
| 432 | CORE_ADDR requested_address; |
| 433 | |
| 434 | /* An additional address assigned with this location. This is currently |
| 435 | only used by STT_GNU_IFUNC resolver breakpoints to hold the address |
| 436 | of the resolver function. */ |
| 437 | CORE_ADDR related_address; |
| 438 | |
| 439 | /* If the location comes from a probe point, this is the probe associated |
| 440 | with it. */ |
| 441 | struct bound_probe probe; |
| 442 | |
| 443 | char *function_name; |
| 444 | |
| 445 | /* Details of the placed breakpoint, when inserted. */ |
| 446 | struct bp_target_info target_info; |
| 447 | |
| 448 | /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */ |
| 449 | struct bp_target_info overlay_target_info; |
| 450 | |
| 451 | /* In a non-stop mode, it's possible that we delete a breakpoint, |
| 452 | but as we do that, some still running thread hits that breakpoint. |
| 453 | For that reason, we need to keep locations belonging to deleted |
| 454 | breakpoints for a bit, so that don't report unexpected SIGTRAP. |
| 455 | We can't keep such locations forever, so we use a heuristic -- |
| 456 | after we process certain number of inferior events since |
| 457 | breakpoint was deleted, we retire all locations of that breakpoint. |
| 458 | This variable keeps a number of events still to go, when |
| 459 | it becomes 0 this location is retired. */ |
| 460 | int events_till_retirement; |
| 461 | |
| 462 | /* Line number which was used to place this location. |
| 463 | |
| 464 | Breakpoint placed into a comment keeps it's user specified line number |
| 465 | despite ADDRESS resolves into a different line number. */ |
| 466 | |
| 467 | int line_number; |
| 468 | |
| 469 | /* Symtab which was used to place this location. This is used |
| 470 | to find the corresponding source file name. */ |
| 471 | |
| 472 | struct symtab *symtab; |
| 473 | }; |
| 474 | |
| 475 | /* The possible return values for print_bpstat, print_it_normal, |
| 476 | print_it_done, print_it_noop. */ |
| 477 | enum print_stop_action |
| 478 | { |
| 479 | /* We printed nothing or we need to do some more analysis. */ |
| 480 | PRINT_UNKNOWN = -1, |
| 481 | |
| 482 | /* We printed something, and we *do* desire that something to be |
| 483 | followed by a location. */ |
| 484 | PRINT_SRC_AND_LOC, |
| 485 | |
| 486 | /* We printed something, and we do *not* desire that something to be |
| 487 | followed by a location. */ |
| 488 | PRINT_SRC_ONLY, |
| 489 | |
| 490 | /* We already printed all we needed to print, don't print anything |
| 491 | else. */ |
| 492 | PRINT_NOTHING |
| 493 | }; |
| 494 | |
| 495 | /* This structure is a collection of function pointers that, if available, |
| 496 | will be called instead of the performing the default action for this |
| 497 | bptype. */ |
| 498 | |
| 499 | struct breakpoint_ops |
| 500 | { |
| 501 | /* Destructor. Releases everything from SELF (but not SELF |
| 502 | itself). */ |
| 503 | void (*dtor) (struct breakpoint *self); |
| 504 | |
| 505 | /* Allocate a location for this breakpoint. */ |
| 506 | struct bp_location * (*allocate_location) (struct breakpoint *); |
| 507 | |
| 508 | /* Reevaluate a breakpoint. This is necessary after symbols change |
| 509 | (e.g., an executable or DSO was loaded, or the inferior just |
| 510 | started). */ |
| 511 | void (*re_set) (struct breakpoint *self); |
| 512 | |
| 513 | /* Insert the breakpoint or watchpoint or activate the catchpoint. |
| 514 | Return 0 for success, 1 if the breakpoint, watchpoint or |
| 515 | catchpoint type is not supported, -1 for failure. */ |
| 516 | int (*insert_location) (struct bp_location *); |
| 517 | |
| 518 | /* Remove the breakpoint/catchpoint that was previously inserted |
| 519 | with the "insert" method above. Return 0 for success, 1 if the |
| 520 | breakpoint, watchpoint or catchpoint type is not supported, |
| 521 | -1 for failure. */ |
| 522 | int (*remove_location) (struct bp_location *); |
| 523 | |
| 524 | /* Return true if it the target has stopped due to hitting |
| 525 | breakpoint location BL. This function does not check if we |
| 526 | should stop, only if BL explains the stop. ASPACE is the address |
| 527 | space in which the event occurred, BP_ADDR is the address at |
| 528 | which the inferior stopped, and WS is the target_waitstatus |
| 529 | describing the event. */ |
| 530 | int (*breakpoint_hit) (const struct bp_location *bl, |
| 531 | struct address_space *aspace, |
| 532 | CORE_ADDR bp_addr, |
| 533 | const struct target_waitstatus *ws); |
| 534 | |
| 535 | /* Check internal conditions of the breakpoint referred to by BS. |
| 536 | If we should not stop for this breakpoint, set BS->stop to 0. */ |
| 537 | void (*check_status) (struct bpstats *bs); |
| 538 | |
| 539 | /* Tell how many hardware resources (debug registers) are needed |
| 540 | for this breakpoint. If this function is not provided, then |
| 541 | the breakpoint or watchpoint needs one debug register. */ |
| 542 | int (*resources_needed) (const struct bp_location *); |
| 543 | |
| 544 | /* Tell whether we can downgrade from a hardware watchpoint to a software |
| 545 | one. If not, the user will not be able to enable the watchpoint when |
| 546 | there are not enough hardware resources available. */ |
| 547 | int (*works_in_software_mode) (const struct breakpoint *); |
| 548 | |
| 549 | /* The normal print routine for this breakpoint, called when we |
| 550 | hit it. */ |
| 551 | enum print_stop_action (*print_it) (struct bpstats *bs); |
| 552 | |
| 553 | /* Display information about this breakpoint, for "info |
| 554 | breakpoints". */ |
| 555 | void (*print_one) (struct breakpoint *, struct bp_location **); |
| 556 | |
| 557 | /* Display extra information about this breakpoint, below the normal |
| 558 | breakpoint description in "info breakpoints". |
| 559 | |
| 560 | In the example below, the "address range" line was printed |
| 561 | by print_one_detail_ranged_breakpoint. |
| 562 | |
| 563 | (gdb) info breakpoints |
| 564 | Num Type Disp Enb Address What |
| 565 | 2 hw breakpoint keep y in main at test-watch.c:70 |
| 566 | address range: [0x10000458, 0x100004c7] |
| 567 | |
| 568 | */ |
| 569 | void (*print_one_detail) (const struct breakpoint *, struct ui_out *); |
| 570 | |
| 571 | /* Display information about this breakpoint after setting it |
| 572 | (roughly speaking; this is called from "mention"). */ |
| 573 | void (*print_mention) (struct breakpoint *); |
| 574 | |
| 575 | /* Print to FP the CLI command that recreates this breakpoint. */ |
| 576 | void (*print_recreate) (struct breakpoint *, struct ui_file *fp); |
| 577 | |
| 578 | /* Create SALs from location, storing the result in linespec_result. |
| 579 | |
| 580 | For an explanation about the arguments, see the function |
| 581 | `create_sals_from_location_default'. |
| 582 | |
| 583 | This function is called inside `create_breakpoint'. */ |
| 584 | void (*create_sals_from_location) (const struct event_location *location, |
| 585 | struct linespec_result *canonical, |
| 586 | enum bptype type_wanted); |
| 587 | |
| 588 | /* This method will be responsible for creating a breakpoint given its SALs. |
| 589 | Usually, it just calls `create_breakpoints_sal' (for ordinary |
| 590 | breakpoints). However, there may be some special cases where we might |
| 591 | need to do some tweaks, e.g., see |
| 592 | `strace_marker_create_breakpoints_sal'. |
| 593 | |
| 594 | This function is called inside `create_breakpoint'. */ |
| 595 | void (*create_breakpoints_sal) (struct gdbarch *, |
| 596 | struct linespec_result *, |
| 597 | char *, char *, |
| 598 | enum bptype, enum bpdisp, int, int, |
| 599 | int, const struct breakpoint_ops *, |
| 600 | int, int, int, unsigned); |
| 601 | |
| 602 | /* Given the location (second parameter), this method decodes it |
| 603 | and provides the SAL locations related to it. For ordinary breakpoints, |
| 604 | it calls `decode_line_full'. |
| 605 | |
| 606 | This function is called inside `location_to_sals'. */ |
| 607 | void (*decode_location) (struct breakpoint *b, |
| 608 | const struct event_location *location, |
| 609 | struct symtabs_and_lines *sals); |
| 610 | |
| 611 | /* Return true if this breakpoint explains a signal. See |
| 612 | bpstat_explains_signal. */ |
| 613 | int (*explains_signal) (struct breakpoint *, enum gdb_signal); |
| 614 | |
| 615 | /* Called after evaluating the breakpoint's condition, |
| 616 | and only if it evaluated true. */ |
| 617 | void (*after_condition_true) (struct bpstats *bs); |
| 618 | }; |
| 619 | |
| 620 | /* Helper for breakpoint_ops->print_recreate implementations. Prints |
| 621 | the "thread" or "task" condition of B, and then a newline. |
| 622 | |
| 623 | Necessary because most breakpoint implementations accept |
| 624 | thread/task conditions at the end of the spec line, like "break foo |
| 625 | thread 1", which needs outputting before any breakpoint-type |
| 626 | specific extra command necessary for B's recreation. */ |
| 627 | extern void print_recreate_thread (struct breakpoint *b, struct ui_file *fp); |
| 628 | |
| 629 | enum watchpoint_triggered |
| 630 | { |
| 631 | /* This watchpoint definitely did not trigger. */ |
| 632 | watch_triggered_no = 0, |
| 633 | |
| 634 | /* Some hardware watchpoint triggered, and it might have been this |
| 635 | one, but we do not know which it was. */ |
| 636 | watch_triggered_unknown, |
| 637 | |
| 638 | /* This hardware watchpoint definitely did trigger. */ |
| 639 | watch_triggered_yes |
| 640 | }; |
| 641 | |
| 642 | typedef struct bp_location *bp_location_p; |
| 643 | DEF_VEC_P(bp_location_p); |
| 644 | |
| 645 | /* A reference-counted struct command_line. This lets multiple |
| 646 | breakpoints share a single command list. This is an implementation |
| 647 | detail to the breakpoints module. */ |
| 648 | struct counted_command_line; |
| 649 | |
| 650 | /* Some targets (e.g., embedded PowerPC) need two debug registers to set |
| 651 | a watchpoint over a memory region. If this flag is true, GDB will use |
| 652 | only one register per watchpoint, thus assuming that all acesses that |
| 653 | modify a memory location happen at its starting address. */ |
| 654 | |
| 655 | extern int target_exact_watchpoints; |
| 656 | |
| 657 | /* Note that the ->silent field is not currently used by any commands |
| 658 | (though the code is in there if it was to be, and set_raw_breakpoint |
| 659 | does set it to 0). I implemented it because I thought it would be |
| 660 | useful for a hack I had to put in; I'm going to leave it in because |
| 661 | I can see how there might be times when it would indeed be useful */ |
| 662 | |
| 663 | /* This is for all kinds of breakpoints. */ |
| 664 | |
| 665 | struct breakpoint |
| 666 | { |
| 667 | /* Methods associated with this breakpoint. */ |
| 668 | const struct breakpoint_ops *ops; |
| 669 | |
| 670 | struct breakpoint *next; |
| 671 | /* Type of breakpoint. */ |
| 672 | enum bptype type; |
| 673 | /* Zero means disabled; remember the info but don't break here. */ |
| 674 | enum enable_state enable_state; |
| 675 | /* What to do with this breakpoint after we hit it. */ |
| 676 | enum bpdisp disposition; |
| 677 | /* Number assigned to distinguish breakpoints. */ |
| 678 | int number; |
| 679 | |
| 680 | /* Location(s) associated with this high-level breakpoint. */ |
| 681 | struct bp_location *loc; |
| 682 | |
| 683 | /* Non-zero means a silent breakpoint (don't print frame info |
| 684 | if we stop here). */ |
| 685 | unsigned char silent; |
| 686 | /* Non-zero means display ADDR_STRING to the user verbatim. */ |
| 687 | unsigned char display_canonical; |
| 688 | /* Number of stops at this breakpoint that should |
| 689 | be continued automatically before really stopping. */ |
| 690 | int ignore_count; |
| 691 | |
| 692 | /* Number of stops at this breakpoint before it will be |
| 693 | disabled. */ |
| 694 | int enable_count; |
| 695 | |
| 696 | /* Chain of command lines to execute when this breakpoint is |
| 697 | hit. */ |
| 698 | struct counted_command_line *commands; |
| 699 | /* Stack depth (address of frame). If nonzero, break only if fp |
| 700 | equals this. */ |
| 701 | struct frame_id frame_id; |
| 702 | |
| 703 | /* The program space used to set the breakpoint. This is only set |
| 704 | for breakpoints which are specific to a program space; for |
| 705 | non-thread-specific ordinary breakpoints this is NULL. */ |
| 706 | struct program_space *pspace; |
| 707 | |
| 708 | /* Location we used to set the breakpoint (malloc'd). */ |
| 709 | struct event_location *location; |
| 710 | |
| 711 | /* The filter that should be passed to decode_line_full when |
| 712 | re-setting this breakpoint. This may be NULL, but otherwise is |
| 713 | allocated with xmalloc. */ |
| 714 | char *filter; |
| 715 | |
| 716 | /* For a ranged breakpoint, the location we used to find |
| 717 | the end of the range (malloc'd). */ |
| 718 | struct event_location *location_range_end; |
| 719 | |
| 720 | /* Architecture we used to set the breakpoint. */ |
| 721 | struct gdbarch *gdbarch; |
| 722 | /* Language we used to set the breakpoint. */ |
| 723 | enum language language; |
| 724 | /* Input radix we used to set the breakpoint. */ |
| 725 | int input_radix; |
| 726 | /* String form of the breakpoint condition (malloc'd), or NULL if |
| 727 | there is no condition. */ |
| 728 | char *cond_string; |
| 729 | |
| 730 | /* String form of extra parameters, or NULL if there are none. |
| 731 | Malloc'd. */ |
| 732 | char *extra_string; |
| 733 | |
| 734 | /* Holds the address of the related watchpoint_scope breakpoint |
| 735 | when using watchpoints on local variables (might the concept of |
| 736 | a related breakpoint be useful elsewhere, if not just call it |
| 737 | the watchpoint_scope breakpoint or something like that. |
| 738 | FIXME). */ |
| 739 | struct breakpoint *related_breakpoint; |
| 740 | |
| 741 | /* Thread number for thread-specific breakpoint, |
| 742 | or -1 if don't care. */ |
| 743 | int thread; |
| 744 | |
| 745 | /* Ada task number for task-specific breakpoint, |
| 746 | or 0 if don't care. */ |
| 747 | int task; |
| 748 | |
| 749 | /* Count of the number of times this breakpoint was taken, dumped |
| 750 | with the info, but not used for anything else. Useful for |
| 751 | seeing how many times you hit a break prior to the program |
| 752 | aborting, so you can back up to just before the abort. */ |
| 753 | int hit_count; |
| 754 | |
| 755 | /* Is breakpoint's condition not yet parsed because we found |
| 756 | no location initially so had no context to parse |
| 757 | the condition in. */ |
| 758 | int condition_not_parsed; |
| 759 | |
| 760 | /* With a Python scripting enabled GDB, store a reference to the |
| 761 | Python object that has been associated with this breakpoint. |
| 762 | This is always NULL for a GDB that is not script enabled. It |
| 763 | can sometimes be NULL for enabled GDBs as not all breakpoint |
| 764 | types are tracked by the scripting language API. */ |
| 765 | struct gdbpy_breakpoint_object *py_bp_object; |
| 766 | |
| 767 | /* Same as py_bp_object, but for Scheme. */ |
| 768 | struct gdbscm_breakpoint_object *scm_bp_object; |
| 769 | }; |
| 770 | |
| 771 | /* An instance of this type is used to represent a watchpoint. It |
| 772 | includes a "struct breakpoint" as a kind of base class; users |
| 773 | downcast to "struct breakpoint *" when needed. */ |
| 774 | |
| 775 | struct watchpoint |
| 776 | { |
| 777 | /* The base class. */ |
| 778 | struct breakpoint base; |
| 779 | |
| 780 | /* String form of exp to use for displaying to the user (malloc'd), |
| 781 | or NULL if none. */ |
| 782 | char *exp_string; |
| 783 | /* String form to use for reparsing of EXP (malloc'd) or NULL. */ |
| 784 | char *exp_string_reparse; |
| 785 | |
| 786 | /* The expression we are watching, or NULL if not a watchpoint. */ |
| 787 | struct expression *exp; |
| 788 | /* The largest block within which it is valid, or NULL if it is |
| 789 | valid anywhere (e.g. consists just of global symbols). */ |
| 790 | const struct block *exp_valid_block; |
| 791 | /* The conditional expression if any. */ |
| 792 | struct expression *cond_exp; |
| 793 | /* The largest block within which it is valid, or NULL if it is |
| 794 | valid anywhere (e.g. consists just of global symbols). */ |
| 795 | const struct block *cond_exp_valid_block; |
| 796 | /* Value of the watchpoint the last time we checked it, or NULL when |
| 797 | we do not know the value yet or the value was not readable. VAL |
| 798 | is never lazy. */ |
| 799 | struct value *val; |
| 800 | /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL, |
| 801 | then an error occurred reading the value. */ |
| 802 | int val_valid; |
| 803 | |
| 804 | /* When watching the location of a bitfield, contains the offset and size of |
| 805 | the bitfield. Otherwise contains 0. */ |
| 806 | int val_bitpos; |
| 807 | int val_bitsize; |
| 808 | |
| 809 | /* Holds the frame address which identifies the frame this |
| 810 | watchpoint should be evaluated in, or `null' if the watchpoint |
| 811 | should be evaluated on the outermost frame. */ |
| 812 | struct frame_id watchpoint_frame; |
| 813 | |
| 814 | /* Holds the thread which identifies the frame this watchpoint |
| 815 | should be considered in scope for, or `null_ptid' if the |
| 816 | watchpoint should be evaluated in all threads. */ |
| 817 | ptid_t watchpoint_thread; |
| 818 | |
| 819 | /* For hardware watchpoints, the triggered status according to the |
| 820 | hardware. */ |
| 821 | enum watchpoint_triggered watchpoint_triggered; |
| 822 | |
| 823 | /* Whether this watchpoint is exact (see |
| 824 | target_exact_watchpoints). */ |
| 825 | int exact; |
| 826 | |
| 827 | /* The mask address for a masked hardware watchpoint. */ |
| 828 | CORE_ADDR hw_wp_mask; |
| 829 | }; |
| 830 | |
| 831 | /* Given a function FUNC (struct breakpoint *B, void *DATA) and |
| 832 | USER_DATA, call FUNC for every known breakpoint passing USER_DATA |
| 833 | as argument. |
| 834 | |
| 835 | If FUNC returns 1, the loop stops and the current |
| 836 | 'struct breakpoint' being processed is returned. If FUNC returns |
| 837 | zero, the loop continues. |
| 838 | |
| 839 | This function returns either a 'struct breakpoint' pointer or NULL. |
| 840 | It was based on BFD's bfd_sections_find_if function. */ |
| 841 | |
| 842 | extern struct breakpoint *breakpoint_find_if |
| 843 | (int (*func) (struct breakpoint *b, void *d), void *user_data); |
| 844 | |
| 845 | /* Return true if BPT is either a software breakpoint or a hardware |
| 846 | breakpoint. */ |
| 847 | |
| 848 | extern int is_breakpoint (const struct breakpoint *bpt); |
| 849 | |
| 850 | /* Returns true if BPT is really a watchpoint. */ |
| 851 | |
| 852 | extern int is_watchpoint (const struct breakpoint *bpt); |
| 853 | |
| 854 | /* An instance of this type is used to represent all kinds of |
| 855 | tracepoints. It includes a "struct breakpoint" as a kind of base |
| 856 | class; users downcast to "struct breakpoint *" when needed. */ |
| 857 | |
| 858 | struct tracepoint |
| 859 | { |
| 860 | /* The base class. */ |
| 861 | struct breakpoint base; |
| 862 | |
| 863 | /* Number of times this tracepoint should single-step and collect |
| 864 | additional data. */ |
| 865 | long step_count; |
| 866 | |
| 867 | /* Number of times this tracepoint should be hit before |
| 868 | disabling/ending. */ |
| 869 | int pass_count; |
| 870 | |
| 871 | /* The number of the tracepoint on the target. */ |
| 872 | int number_on_target; |
| 873 | |
| 874 | /* The total space taken by all the trace frames for this |
| 875 | tracepoint. */ |
| 876 | ULONGEST traceframe_usage; |
| 877 | |
| 878 | /* The static tracepoint marker id, if known. */ |
| 879 | char *static_trace_marker_id; |
| 880 | |
| 881 | /* LTTng/UST allow more than one marker with the same ID string, |
| 882 | although it unadvised because it confuses tools. When setting |
| 883 | static tracepoints by marker ID, this will record the index in |
| 884 | the array of markers we found for the given marker ID for which |
| 885 | this static tracepoint corresponds. When resetting breakpoints, |
| 886 | we will use this index to try to find the same marker again. */ |
| 887 | int static_trace_marker_id_idx; |
| 888 | }; |
| 889 | |
| 890 | typedef struct breakpoint *breakpoint_p; |
| 891 | DEF_VEC_P(breakpoint_p); |
| 892 | \f |
| 893 | /* The following stuff is an abstract data type "bpstat" ("breakpoint |
| 894 | status"). This provides the ability to determine whether we have |
| 895 | stopped at a breakpoint, and what we should do about it. */ |
| 896 | |
| 897 | typedef struct bpstats *bpstat; |
| 898 | |
| 899 | /* Clears a chain of bpstat, freeing storage |
| 900 | of each. */ |
| 901 | extern void bpstat_clear (bpstat *); |
| 902 | |
| 903 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that |
| 904 | is part of the bpstat is copied as well. */ |
| 905 | extern bpstat bpstat_copy (bpstat); |
| 906 | |
| 907 | extern bpstat bpstat_stop_status (struct address_space *aspace, |
| 908 | CORE_ADDR pc, ptid_t ptid, |
| 909 | const struct target_waitstatus *ws); |
| 910 | \f |
| 911 | /* This bpstat_what stuff tells wait_for_inferior what to do with a |
| 912 | breakpoint (a challenging task). |
| 913 | |
| 914 | The enum values order defines priority-like order of the actions. |
| 915 | Once you've decided that some action is appropriate, you'll never |
| 916 | go back and decide something of a lower priority is better. Each |
| 917 | of these actions is mutually exclusive with the others. That |
| 918 | means, that if you find yourself adding a new action class here and |
| 919 | wanting to tell GDB that you have two simultaneous actions to |
| 920 | handle, something is wrong, and you probably don't actually need a |
| 921 | new action type. |
| 922 | |
| 923 | Note that a step resume breakpoint overrides another breakpoint of |
| 924 | signal handling (see comment in wait_for_inferior at where we set |
| 925 | the step_resume breakpoint). */ |
| 926 | |
| 927 | enum bpstat_what_main_action |
| 928 | { |
| 929 | /* Perform various other tests; that is, this bpstat does not |
| 930 | say to perform any action (e.g. failed watchpoint and nothing |
| 931 | else). */ |
| 932 | BPSTAT_WHAT_KEEP_CHECKING, |
| 933 | |
| 934 | /* Remove breakpoints, single step once, then put them back in and |
| 935 | go back to what we were doing. It's possible that this should |
| 936 | be removed from the main_action and put into a separate field, |
| 937 | to more cleanly handle |
| 938 | BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */ |
| 939 | BPSTAT_WHAT_SINGLE, |
| 940 | |
| 941 | /* Set longjmp_resume breakpoint, remove all other breakpoints, |
| 942 | and continue. The "remove all other breakpoints" part is |
| 943 | required if we are also stepping over another breakpoint as |
| 944 | well as doing the longjmp handling. */ |
| 945 | BPSTAT_WHAT_SET_LONGJMP_RESUME, |
| 946 | |
| 947 | /* Clear longjmp_resume breakpoint, then handle as |
| 948 | BPSTAT_WHAT_KEEP_CHECKING. */ |
| 949 | BPSTAT_WHAT_CLEAR_LONGJMP_RESUME, |
| 950 | |
| 951 | /* Clear step resume breakpoint, and keep checking. */ |
| 952 | BPSTAT_WHAT_STEP_RESUME, |
| 953 | |
| 954 | /* Rather than distinguish between noisy and silent stops here, it |
| 955 | might be cleaner to have bpstat_print make that decision (also |
| 956 | taking into account stop_print_frame and source_only). But the |
| 957 | implications are a bit scary (interaction with auto-displays, |
| 958 | etc.), so I won't try it. */ |
| 959 | |
| 960 | /* Stop silently. */ |
| 961 | BPSTAT_WHAT_STOP_SILENT, |
| 962 | |
| 963 | /* Stop and print. */ |
| 964 | BPSTAT_WHAT_STOP_NOISY, |
| 965 | |
| 966 | /* Clear step resume breakpoint, and keep checking. High-priority |
| 967 | step-resume breakpoints are used when even if there's a user |
| 968 | breakpoint at the current PC when we set the step-resume |
| 969 | breakpoint, we don't want to re-handle any breakpoint other |
| 970 | than the step-resume when it's hit; instead we want to move |
| 971 | past the breakpoint. This is used in the case of skipping |
| 972 | signal handlers. */ |
| 973 | BPSTAT_WHAT_HP_STEP_RESUME, |
| 974 | }; |
| 975 | |
| 976 | /* An enum indicating the kind of "stack dummy" stop. This is a bit |
| 977 | of a misnomer because only one kind of truly a stack dummy. */ |
| 978 | enum stop_stack_kind |
| 979 | { |
| 980 | /* We didn't stop at a stack dummy breakpoint. */ |
| 981 | STOP_NONE = 0, |
| 982 | |
| 983 | /* Stopped at a stack dummy. */ |
| 984 | STOP_STACK_DUMMY, |
| 985 | |
| 986 | /* Stopped at std::terminate. */ |
| 987 | STOP_STD_TERMINATE |
| 988 | }; |
| 989 | |
| 990 | struct bpstat_what |
| 991 | { |
| 992 | enum bpstat_what_main_action main_action; |
| 993 | |
| 994 | /* Did we hit a call dummy breakpoint? This only goes with a |
| 995 | main_action of BPSTAT_WHAT_STOP_SILENT or |
| 996 | BPSTAT_WHAT_STOP_NOISY (the concept of continuing from a call |
| 997 | dummy without popping the frame is not a useful one). */ |
| 998 | enum stop_stack_kind call_dummy; |
| 999 | |
| 1000 | /* Used for BPSTAT_WHAT_SET_LONGJMP_RESUME and |
| 1001 | BPSTAT_WHAT_CLEAR_LONGJMP_RESUME. True if we are handling a |
| 1002 | longjmp, false if we are handling an exception. */ |
| 1003 | int is_longjmp; |
| 1004 | }; |
| 1005 | |
| 1006 | /* Tell what to do about this bpstat. */ |
| 1007 | struct bpstat_what bpstat_what (bpstat); |
| 1008 | |
| 1009 | /* Run breakpoint event callbacks associated with the breakpoints that |
| 1010 | triggered. */ |
| 1011 | extern void bpstat_run_callbacks (bpstat bs_head); |
| 1012 | |
| 1013 | /* Find the bpstat associated with a breakpoint. NULL otherwise. */ |
| 1014 | bpstat bpstat_find_breakpoint (bpstat, struct breakpoint *); |
| 1015 | |
| 1016 | /* Nonzero if a signal that we got in target_wait() was due to |
| 1017 | circumstances explained by the bpstat; the signal is therefore not |
| 1018 | random. */ |
| 1019 | extern int bpstat_explains_signal (bpstat, enum gdb_signal); |
| 1020 | |
| 1021 | /* Nonzero is this bpstat causes a stop. */ |
| 1022 | extern int bpstat_causes_stop (bpstat); |
| 1023 | |
| 1024 | /* Nonzero if we should step constantly (e.g. watchpoints on machines |
| 1025 | without hardware support). This isn't related to a specific bpstat, |
| 1026 | just to things like whether watchpoints are set. */ |
| 1027 | extern int bpstat_should_step (void); |
| 1028 | |
| 1029 | /* Print a message indicating what happened. Returns nonzero to |
| 1030 | say that only the source line should be printed after this (zero |
| 1031 | return means print the frame as well as the source line). */ |
| 1032 | extern enum print_stop_action bpstat_print (bpstat, int); |
| 1033 | |
| 1034 | /* Put in *NUM the breakpoint number of the first breakpoint we are |
| 1035 | stopped at. *BSP upon return is a bpstat which points to the |
| 1036 | remaining breakpoints stopped at (but which is not guaranteed to be |
| 1037 | good for anything but further calls to bpstat_num). |
| 1038 | |
| 1039 | Return 0 if passed a bpstat which does not indicate any breakpoints. |
| 1040 | Return -1 if stopped at a breakpoint that has been deleted since |
| 1041 | we set it. |
| 1042 | Return 1 otherwise. */ |
| 1043 | extern int bpstat_num (bpstat *, int *); |
| 1044 | |
| 1045 | /* Perform actions associated with the stopped inferior. Actually, we |
| 1046 | just use this for breakpoint commands. Perhaps other actions will |
| 1047 | go here later, but this is executed at a late time (from the |
| 1048 | command loop). */ |
| 1049 | extern void bpstat_do_actions (void); |
| 1050 | |
| 1051 | /* Modify all entries of STOP_BPSTAT of INFERIOR_PTID so that the actions will |
| 1052 | not be performed. */ |
| 1053 | extern void bpstat_clear_actions (void); |
| 1054 | |
| 1055 | /* Implementation: */ |
| 1056 | |
| 1057 | /* Values used to tell the printing routine how to behave for this |
| 1058 | bpstat. */ |
| 1059 | enum bp_print_how |
| 1060 | { |
| 1061 | /* This is used when we want to do a normal printing of the reason |
| 1062 | for stopping. The output will depend on the type of eventpoint |
| 1063 | we are dealing with. This is the default value, most commonly |
| 1064 | used. */ |
| 1065 | print_it_normal, |
| 1066 | /* This is used when nothing should be printed for this bpstat |
| 1067 | entry. */ |
| 1068 | print_it_noop, |
| 1069 | /* This is used when everything which needs to be printed has |
| 1070 | already been printed. But we still want to print the frame. */ |
| 1071 | print_it_done |
| 1072 | }; |
| 1073 | |
| 1074 | struct bpstats |
| 1075 | { |
| 1076 | /* Linked list because there can be more than one breakpoint at |
| 1077 | the same place, and a bpstat reflects the fact that all have |
| 1078 | been hit. */ |
| 1079 | bpstat next; |
| 1080 | |
| 1081 | /* Location that caused the stop. Locations are refcounted, so |
| 1082 | this will never be NULL. Note that this location may end up |
| 1083 | detached from a breakpoint, but that does not necessary mean |
| 1084 | that the struct breakpoint is gone. E.g., consider a |
| 1085 | watchpoint with a condition that involves an inferior function |
| 1086 | call. Watchpoint locations are recreated often (on resumes, |
| 1087 | hence on infcalls too). Between creating the bpstat and after |
| 1088 | evaluating the watchpoint condition, this location may hence |
| 1089 | end up detached from its original owner watchpoint, even though |
| 1090 | the watchpoint is still listed. If it's condition evaluates as |
| 1091 | true, we still want this location to cause a stop, and we will |
| 1092 | still need to know which watchpoint it was originally attached. |
| 1093 | What this means is that we should not (in most cases) follow |
| 1094 | the `bpstat->bp_location->owner' link, but instead use the |
| 1095 | `breakpoint_at' field below. */ |
| 1096 | struct bp_location *bp_location_at; |
| 1097 | |
| 1098 | /* Breakpoint that caused the stop. This is nullified if the |
| 1099 | breakpoint ends up being deleted. See comments on |
| 1100 | `bp_location_at' above for why do we need this field instead of |
| 1101 | following the location's owner. */ |
| 1102 | struct breakpoint *breakpoint_at; |
| 1103 | |
| 1104 | /* The associated command list. */ |
| 1105 | struct counted_command_line *commands; |
| 1106 | |
| 1107 | /* Old value associated with a watchpoint. */ |
| 1108 | struct value *old_val; |
| 1109 | |
| 1110 | /* Nonzero if this breakpoint tells us to print the frame. */ |
| 1111 | char print; |
| 1112 | |
| 1113 | /* Nonzero if this breakpoint tells us to stop. */ |
| 1114 | char stop; |
| 1115 | |
| 1116 | /* Tell bpstat_print and print_bp_stop_message how to print stuff |
| 1117 | associated with this element of the bpstat chain. */ |
| 1118 | enum bp_print_how print_it; |
| 1119 | }; |
| 1120 | |
| 1121 | enum inf_context |
| 1122 | { |
| 1123 | inf_starting, |
| 1124 | inf_running, |
| 1125 | inf_exited, |
| 1126 | inf_execd |
| 1127 | }; |
| 1128 | |
| 1129 | /* The possible return values for breakpoint_here_p. |
| 1130 | We guarantee that zero always means "no breakpoint here". */ |
| 1131 | enum breakpoint_here |
| 1132 | { |
| 1133 | no_breakpoint_here = 0, |
| 1134 | ordinary_breakpoint_here, |
| 1135 | permanent_breakpoint_here |
| 1136 | }; |
| 1137 | \f |
| 1138 | |
| 1139 | /* Prototypes for breakpoint-related functions. */ |
| 1140 | |
| 1141 | /* Return 1 if there's a program/permanent breakpoint planted in |
| 1142 | memory at ADDRESS, return 0 otherwise. */ |
| 1143 | |
| 1144 | extern int program_breakpoint_here_p (struct gdbarch *gdbarch, CORE_ADDR address); |
| 1145 | |
| 1146 | extern enum breakpoint_here breakpoint_here_p (struct address_space *, |
| 1147 | CORE_ADDR); |
| 1148 | |
| 1149 | /* Return true if an enabled breakpoint exists in the range defined by |
| 1150 | ADDR and LEN, in ASPACE. */ |
| 1151 | extern int breakpoint_in_range_p (struct address_space *aspace, |
| 1152 | CORE_ADDR addr, ULONGEST len); |
| 1153 | |
| 1154 | extern int moribund_breakpoint_here_p (struct address_space *, CORE_ADDR); |
| 1155 | |
| 1156 | extern int breakpoint_inserted_here_p (struct address_space *, CORE_ADDR); |
| 1157 | |
| 1158 | extern int regular_breakpoint_inserted_here_p (struct address_space *, |
| 1159 | CORE_ADDR); |
| 1160 | |
| 1161 | extern int software_breakpoint_inserted_here_p (struct address_space *, |
| 1162 | CORE_ADDR); |
| 1163 | |
| 1164 | /* Return non-zero iff there is a hardware breakpoint inserted at |
| 1165 | PC. */ |
| 1166 | extern int hardware_breakpoint_inserted_here_p (struct address_space *, |
| 1167 | CORE_ADDR); |
| 1168 | |
| 1169 | /* Check whether any location of BP is inserted at PC. */ |
| 1170 | |
| 1171 | extern int breakpoint_has_location_inserted_here (struct breakpoint *bp, |
| 1172 | struct address_space *aspace, |
| 1173 | CORE_ADDR pc); |
| 1174 | |
| 1175 | extern int single_step_breakpoint_inserted_here_p (struct address_space *, |
| 1176 | CORE_ADDR); |
| 1177 | |
| 1178 | /* Returns true if there's a hardware watchpoint or access watchpoint |
| 1179 | inserted in the range defined by ADDR and LEN. */ |
| 1180 | extern int hardware_watchpoint_inserted_in_range (struct address_space *, |
| 1181 | CORE_ADDR addr, |
| 1182 | ULONGEST len); |
| 1183 | |
| 1184 | /* Returns true if {ASPACE1,ADDR1} and {ASPACE2,ADDR2} represent the |
| 1185 | same breakpoint location. In most targets, this can only be true |
| 1186 | if ASPACE1 matches ASPACE2. On targets that have global |
| 1187 | breakpoints, the address space doesn't really matter. */ |
| 1188 | |
| 1189 | extern int breakpoint_address_match (struct address_space *aspace1, |
| 1190 | CORE_ADDR addr1, |
| 1191 | struct address_space *aspace2, |
| 1192 | CORE_ADDR addr2); |
| 1193 | |
| 1194 | extern void until_break_command (char *, int, int); |
| 1195 | |
| 1196 | /* Initialize a struct bp_location. */ |
| 1197 | |
| 1198 | extern void init_bp_location (struct bp_location *loc, |
| 1199 | const struct bp_location_ops *ops, |
| 1200 | struct breakpoint *owner); |
| 1201 | |
| 1202 | extern void update_breakpoint_locations (struct breakpoint *b, |
| 1203 | struct symtabs_and_lines sals, |
| 1204 | struct symtabs_and_lines sals_end); |
| 1205 | |
| 1206 | extern void breakpoint_re_set (void); |
| 1207 | |
| 1208 | extern void breakpoint_re_set_thread (struct breakpoint *); |
| 1209 | |
| 1210 | extern struct breakpoint *set_momentary_breakpoint |
| 1211 | (struct gdbarch *, struct symtab_and_line, struct frame_id, enum bptype); |
| 1212 | |
| 1213 | extern struct breakpoint *set_momentary_breakpoint_at_pc |
| 1214 | (struct gdbarch *, CORE_ADDR pc, enum bptype type); |
| 1215 | |
| 1216 | extern struct breakpoint *clone_momentary_breakpoint (struct breakpoint *bpkt); |
| 1217 | |
| 1218 | extern void set_ignore_count (int, int, int); |
| 1219 | |
| 1220 | extern void breakpoint_init_inferior (enum inf_context); |
| 1221 | |
| 1222 | extern struct cleanup *make_cleanup_delete_breakpoint (struct breakpoint *); |
| 1223 | |
| 1224 | extern void delete_breakpoint (struct breakpoint *); |
| 1225 | |
| 1226 | extern void breakpoint_auto_delete (bpstat); |
| 1227 | |
| 1228 | typedef void (*walk_bp_location_callback) (struct bp_location *, void *); |
| 1229 | |
| 1230 | extern void iterate_over_bp_locations (walk_bp_location_callback); |
| 1231 | |
| 1232 | /* Return the chain of command lines to execute when this breakpoint |
| 1233 | is hit. */ |
| 1234 | extern struct command_line *breakpoint_commands (struct breakpoint *b); |
| 1235 | |
| 1236 | /* Return a string image of DISP. The string is static, and thus should |
| 1237 | NOT be deallocated after use. */ |
| 1238 | const char *bpdisp_text (enum bpdisp disp); |
| 1239 | |
| 1240 | extern void break_command (char *, int); |
| 1241 | |
| 1242 | extern void hbreak_command_wrapper (char *, int); |
| 1243 | extern void thbreak_command_wrapper (char *, int); |
| 1244 | extern void rbreak_command_wrapper (char *, int); |
| 1245 | extern void watch_command_wrapper (char *, int, int); |
| 1246 | extern void awatch_command_wrapper (char *, int, int); |
| 1247 | extern void rwatch_command_wrapper (char *, int, int); |
| 1248 | extern void tbreak_command (char *, int); |
| 1249 | |
| 1250 | extern struct breakpoint_ops base_breakpoint_ops; |
| 1251 | extern struct breakpoint_ops bkpt_breakpoint_ops; |
| 1252 | extern struct breakpoint_ops tracepoint_breakpoint_ops; |
| 1253 | extern struct breakpoint_ops dprintf_breakpoint_ops; |
| 1254 | |
| 1255 | extern void initialize_breakpoint_ops (void); |
| 1256 | |
| 1257 | /* Arguments to pass as context to some catch command handlers. */ |
| 1258 | #define CATCH_PERMANENT ((void *) (uintptr_t) 0) |
| 1259 | #define CATCH_TEMPORARY ((void *) (uintptr_t) 1) |
| 1260 | |
| 1261 | /* Like add_cmd, but add the command to both the "catch" and "tcatch" |
| 1262 | lists, and pass some additional user data to the command |
| 1263 | function. */ |
| 1264 | |
| 1265 | extern void |
| 1266 | add_catch_command (char *name, char *docstring, |
| 1267 | cmd_sfunc_ftype *sfunc, |
| 1268 | completer_ftype *completer, |
| 1269 | void *user_data_catch, |
| 1270 | void *user_data_tcatch); |
| 1271 | |
| 1272 | /* Initialize a breakpoint struct for Ada exception catchpoints. */ |
| 1273 | |
| 1274 | extern void |
| 1275 | init_ada_exception_breakpoint (struct breakpoint *b, |
| 1276 | struct gdbarch *gdbarch, |
| 1277 | struct symtab_and_line sal, |
| 1278 | char *addr_string, |
| 1279 | const struct breakpoint_ops *ops, |
| 1280 | int tempflag, |
| 1281 | int enabled, |
| 1282 | int from_tty); |
| 1283 | |
| 1284 | extern void init_catchpoint (struct breakpoint *b, |
| 1285 | struct gdbarch *gdbarch, int tempflag, |
| 1286 | char *cond_string, |
| 1287 | const struct breakpoint_ops *ops); |
| 1288 | |
| 1289 | /* Add breakpoint B on the breakpoint list, and notify the user, the |
| 1290 | target and breakpoint_created observers of its existence. If |
| 1291 | INTERNAL is non-zero, the breakpoint number will be allocated from |
| 1292 | the internal breakpoint count. If UPDATE_GLL is non-zero, |
| 1293 | update_global_location_list will be called. */ |
| 1294 | |
| 1295 | extern void install_breakpoint (int internal, struct breakpoint *b, |
| 1296 | int update_gll); |
| 1297 | |
| 1298 | /* Flags that can be passed down to create_breakpoint, etc., to affect |
| 1299 | breakpoint creation in several ways. */ |
| 1300 | |
| 1301 | enum breakpoint_create_flags |
| 1302 | { |
| 1303 | /* We're adding a breakpoint to our tables that is already |
| 1304 | inserted in the target. */ |
| 1305 | CREATE_BREAKPOINT_FLAGS_INSERTED = 1 << 0 |
| 1306 | }; |
| 1307 | |
| 1308 | /* Set a breakpoint. This function is shared between CLI and MI functions |
| 1309 | for setting a breakpoint at LOCATION. |
| 1310 | |
| 1311 | This function has two major modes of operations, selected by the |
| 1312 | PARSE_EXTRA parameter. |
| 1313 | |
| 1314 | If PARSE_EXTRA is zero, LOCATION is just the breakpoint's location, |
| 1315 | with condition, thread, and extra string specified by the COND_STRING, |
| 1316 | THREAD, and EXTRA_STRING parameters. |
| 1317 | |
| 1318 | If PARSE_EXTRA is non-zero, this function will attempt to extract |
| 1319 | the condition, thread, and extra string from EXTRA_STRING, ignoring |
| 1320 | the similarly named parameters. |
| 1321 | |
| 1322 | If INTERNAL is non-zero, the breakpoint number will be allocated |
| 1323 | from the internal breakpoint count. |
| 1324 | |
| 1325 | Returns true if any breakpoint was created; false otherwise. */ |
| 1326 | |
| 1327 | extern int create_breakpoint (struct gdbarch *gdbarch, |
| 1328 | const struct event_location *location, |
| 1329 | char *cond_string, int thread, |
| 1330 | char *extra_string, |
| 1331 | int parse_extra, |
| 1332 | int tempflag, enum bptype wanted_type, |
| 1333 | int ignore_count, |
| 1334 | enum auto_boolean pending_break_support, |
| 1335 | const struct breakpoint_ops *ops, |
| 1336 | int from_tty, |
| 1337 | int enabled, |
| 1338 | int internal, unsigned flags); |
| 1339 | |
| 1340 | extern void insert_breakpoints (void); |
| 1341 | |
| 1342 | extern int remove_breakpoints (void); |
| 1343 | |
| 1344 | extern int remove_breakpoints_pid (int pid); |
| 1345 | |
| 1346 | /* This function can be used to physically insert eventpoints from the |
| 1347 | specified traced inferior process, without modifying the breakpoint |
| 1348 | package's state. This can be useful for those targets which |
| 1349 | support following the processes of a fork() or vfork() system call, |
| 1350 | when both of the resulting two processes are to be followed. */ |
| 1351 | extern int reattach_breakpoints (int); |
| 1352 | |
| 1353 | /* This function can be used to update the breakpoint package's state |
| 1354 | after an exec() system call has been executed. |
| 1355 | |
| 1356 | This function causes the following: |
| 1357 | |
| 1358 | - All eventpoints are marked "not inserted". |
| 1359 | - All eventpoints with a symbolic address are reset such that |
| 1360 | the symbolic address must be reevaluated before the eventpoints |
| 1361 | can be reinserted. |
| 1362 | - The solib breakpoints are explicitly removed from the breakpoint |
| 1363 | list. |
| 1364 | - A step-resume breakpoint, if any, is explicitly removed from the |
| 1365 | breakpoint list. |
| 1366 | - All eventpoints without a symbolic address are removed from the |
| 1367 | breakpoint list. */ |
| 1368 | extern void update_breakpoints_after_exec (void); |
| 1369 | |
| 1370 | /* This function can be used to physically remove hardware breakpoints |
| 1371 | and watchpoints from the specified traced inferior process, without |
| 1372 | modifying the breakpoint package's state. This can be useful for |
| 1373 | those targets which support following the processes of a fork() or |
| 1374 | vfork() system call, when one of the resulting two processes is to |
| 1375 | be detached and allowed to run free. |
| 1376 | |
| 1377 | It is an error to use this function on the process whose id is |
| 1378 | inferior_ptid. */ |
| 1379 | extern int detach_breakpoints (ptid_t ptid); |
| 1380 | |
| 1381 | /* This function is called when program space PSPACE is about to be |
| 1382 | deleted. It takes care of updating breakpoints to not reference |
| 1383 | this PSPACE anymore. */ |
| 1384 | extern void breakpoint_program_space_exit (struct program_space *pspace); |
| 1385 | |
| 1386 | extern void set_longjmp_breakpoint (struct thread_info *tp, |
| 1387 | struct frame_id frame); |
| 1388 | extern void delete_longjmp_breakpoint (int thread); |
| 1389 | |
| 1390 | /* Mark all longjmp breakpoints from THREAD for later deletion. */ |
| 1391 | extern void delete_longjmp_breakpoint_at_next_stop (int thread); |
| 1392 | |
| 1393 | extern struct breakpoint *set_longjmp_breakpoint_for_call_dummy (void); |
| 1394 | extern void check_longjmp_breakpoint_for_call_dummy (struct thread_info *tp); |
| 1395 | |
| 1396 | extern void enable_overlay_breakpoints (void); |
| 1397 | extern void disable_overlay_breakpoints (void); |
| 1398 | |
| 1399 | extern void set_std_terminate_breakpoint (void); |
| 1400 | extern void delete_std_terminate_breakpoint (void); |
| 1401 | |
| 1402 | /* These functions respectively disable or reenable all currently |
| 1403 | enabled watchpoints. When disabled, the watchpoints are marked |
| 1404 | call_disabled. When re-enabled, they are marked enabled. |
| 1405 | |
| 1406 | The intended client of these functions is call_function_by_hand. |
| 1407 | |
| 1408 | The inferior must be stopped, and all breakpoints removed, when |
| 1409 | these functions are used. |
| 1410 | |
| 1411 | The need for these functions is that on some targets (e.g., HP-UX), |
| 1412 | gdb is unable to unwind through the dummy frame that is pushed as |
| 1413 | part of the implementation of a call command. Watchpoints can |
| 1414 | cause the inferior to stop in places where this frame is visible, |
| 1415 | and that can cause execution control to become very confused. |
| 1416 | |
| 1417 | Note that if a user sets breakpoints in an interactively called |
| 1418 | function, the call_disabled watchpoints will have been re-enabled |
| 1419 | when the first such breakpoint is reached. However, on targets |
| 1420 | that are unable to unwind through the call dummy frame, watches |
| 1421 | of stack-based storage may then be deleted, because gdb will |
| 1422 | believe that their watched storage is out of scope. (Sigh.) */ |
| 1423 | extern void disable_watchpoints_before_interactive_call_start (void); |
| 1424 | |
| 1425 | extern void enable_watchpoints_after_interactive_call_stop (void); |
| 1426 | |
| 1427 | /* These functions disable and re-enable all breakpoints during |
| 1428 | inferior startup. They are intended to be called from solib |
| 1429 | code where necessary. This is needed on platforms where the |
| 1430 | main executable is relocated at some point during startup |
| 1431 | processing, making breakpoint addresses invalid. |
| 1432 | |
| 1433 | If additional breakpoints are created after the routine |
| 1434 | disable_breakpoints_before_startup but before the routine |
| 1435 | enable_breakpoints_after_startup was called, they will also |
| 1436 | be marked as disabled. */ |
| 1437 | extern void disable_breakpoints_before_startup (void); |
| 1438 | extern void enable_breakpoints_after_startup (void); |
| 1439 | |
| 1440 | /* For script interpreters that need to define breakpoint commands |
| 1441 | after they've already read the commands into a struct |
| 1442 | command_line. */ |
| 1443 | extern enum command_control_type commands_from_control_command |
| 1444 | (char *arg, struct command_line *cmd); |
| 1445 | |
| 1446 | extern void clear_breakpoint_hit_counts (void); |
| 1447 | |
| 1448 | extern struct breakpoint *get_breakpoint (int num); |
| 1449 | |
| 1450 | /* The following are for displays, which aren't really breakpoints, |
| 1451 | but here is as good a place as any for them. */ |
| 1452 | |
| 1453 | extern void disable_current_display (void); |
| 1454 | |
| 1455 | extern void do_displays (void); |
| 1456 | |
| 1457 | extern void disable_display (int); |
| 1458 | |
| 1459 | extern void clear_displays (void); |
| 1460 | |
| 1461 | extern void disable_breakpoint (struct breakpoint *); |
| 1462 | |
| 1463 | extern void enable_breakpoint (struct breakpoint *); |
| 1464 | |
| 1465 | extern void breakpoint_set_commands (struct breakpoint *b, |
| 1466 | struct command_line *commands); |
| 1467 | |
| 1468 | extern void breakpoint_set_silent (struct breakpoint *b, int silent); |
| 1469 | |
| 1470 | extern void breakpoint_set_thread (struct breakpoint *b, int thread); |
| 1471 | |
| 1472 | extern void breakpoint_set_task (struct breakpoint *b, int task); |
| 1473 | |
| 1474 | /* Clear the "inserted" flag in all breakpoints. */ |
| 1475 | extern void mark_breakpoints_out (void); |
| 1476 | |
| 1477 | extern struct breakpoint *create_jit_event_breakpoint (struct gdbarch *, |
| 1478 | CORE_ADDR); |
| 1479 | |
| 1480 | extern struct breakpoint *create_solib_event_breakpoint (struct gdbarch *, |
| 1481 | CORE_ADDR); |
| 1482 | |
| 1483 | /* Create an solib event breakpoint at ADDRESS in the current program |
| 1484 | space, and immediately try to insert it. Returns a pointer to the |
| 1485 | breakpoint on success. Deletes the new breakpoint and returns NULL |
| 1486 | if inserting the breakpoint fails. */ |
| 1487 | extern struct breakpoint *create_and_insert_solib_event_breakpoint |
| 1488 | (struct gdbarch *gdbarch, CORE_ADDR address); |
| 1489 | |
| 1490 | extern struct breakpoint *create_thread_event_breakpoint (struct gdbarch *, |
| 1491 | CORE_ADDR); |
| 1492 | |
| 1493 | extern void remove_jit_event_breakpoints (void); |
| 1494 | |
| 1495 | extern void remove_solib_event_breakpoints (void); |
| 1496 | |
| 1497 | /* Mark solib event breakpoints of the current program space with |
| 1498 | delete at next stop disposition. */ |
| 1499 | extern void remove_solib_event_breakpoints_at_next_stop (void); |
| 1500 | |
| 1501 | extern void remove_thread_event_breakpoints (void); |
| 1502 | |
| 1503 | extern void disable_breakpoints_in_shlibs (void); |
| 1504 | |
| 1505 | /* This function returns TRUE if ep is a catchpoint. */ |
| 1506 | extern int is_catchpoint (struct breakpoint *); |
| 1507 | |
| 1508 | /* Shared helper function (MI and CLI) for creating and installing |
| 1509 | a shared object event catchpoint. */ |
| 1510 | extern void add_solib_catchpoint (char *arg, int is_load, int is_temp, |
| 1511 | int enabled); |
| 1512 | |
| 1513 | /* Enable breakpoints and delete when hit. Called with ARG == NULL |
| 1514 | deletes all breakpoints. */ |
| 1515 | extern void delete_command (char *arg, int from_tty); |
| 1516 | |
| 1517 | /* Create and insert a new software single step breakpoint for the |
| 1518 | current thread. May be called multiple times; each time will add a |
| 1519 | new location to the set of potential addresses the next instruction |
| 1520 | is at. */ |
| 1521 | extern void insert_single_step_breakpoint (struct gdbarch *, |
| 1522 | struct address_space *, |
| 1523 | CORE_ADDR); |
| 1524 | /* Check if any hardware watchpoints have triggered, according to the |
| 1525 | target. */ |
| 1526 | int watchpoints_triggered (struct target_waitstatus *); |
| 1527 | |
| 1528 | /* Helper for transparent breakpoint hiding for memory read and write |
| 1529 | routines. |
| 1530 | |
| 1531 | Update one of READBUF or WRITEBUF with either the shadows |
| 1532 | (READBUF), or the breakpoint instructions (WRITEBUF) of inserted |
| 1533 | breakpoints at the memory range defined by MEMADDR and extending |
| 1534 | for LEN bytes. If writing, then WRITEBUF is a copy of WRITEBUF_ORG |
| 1535 | on entry.*/ |
| 1536 | extern void breakpoint_xfer_memory (gdb_byte *readbuf, gdb_byte *writebuf, |
| 1537 | const gdb_byte *writebuf_org, |
| 1538 | ULONGEST memaddr, LONGEST len); |
| 1539 | |
| 1540 | /* Return true if breakpoints should be inserted now. That'll be the |
| 1541 | case if either: |
| 1542 | |
| 1543 | - the target has global breakpoints. |
| 1544 | |
| 1545 | - "breakpoint always-inserted" is on, and the target has |
| 1546 | execution. |
| 1547 | |
| 1548 | - threads are executing. |
| 1549 | */ |
| 1550 | extern int breakpoints_should_be_inserted_now (void); |
| 1551 | |
| 1552 | /* Called each time new event from target is processed. |
| 1553 | Retires previously deleted breakpoint locations that |
| 1554 | in our opinion won't ever trigger. */ |
| 1555 | extern void breakpoint_retire_moribund (void); |
| 1556 | |
| 1557 | /* Set break condition of breakpoint B to EXP. */ |
| 1558 | extern void set_breakpoint_condition (struct breakpoint *b, const char *exp, |
| 1559 | int from_tty); |
| 1560 | |
| 1561 | /* Checks if we are catching syscalls or not. |
| 1562 | Returns 0 if not, greater than 0 if we are. */ |
| 1563 | extern int catch_syscall_enabled (void); |
| 1564 | |
| 1565 | /* Checks if we are catching syscalls with the specific |
| 1566 | syscall_number. Used for "filtering" the catchpoints. |
| 1567 | Returns 0 if not, greater than 0 if we are. */ |
| 1568 | extern int catching_syscall_number (int syscall_number); |
| 1569 | |
| 1570 | /* Return a tracepoint with the given number if found. */ |
| 1571 | extern struct tracepoint *get_tracepoint (int num); |
| 1572 | |
| 1573 | extern struct tracepoint *get_tracepoint_by_number_on_target (int num); |
| 1574 | |
| 1575 | /* Find a tracepoint by parsing a number in the supplied string. */ |
| 1576 | extern struct tracepoint * |
| 1577 | get_tracepoint_by_number (char **arg, |
| 1578 | struct get_number_or_range_state *state); |
| 1579 | |
| 1580 | /* Return a vector of all tracepoints currently defined. The vector |
| 1581 | is newly allocated; the caller should free when done with it. */ |
| 1582 | extern VEC(breakpoint_p) *all_tracepoints (void); |
| 1583 | |
| 1584 | extern int is_tracepoint (const struct breakpoint *b); |
| 1585 | |
| 1586 | /* Return a vector of all static tracepoints defined at ADDR. The |
| 1587 | vector is newly allocated; the caller should free when done with |
| 1588 | it. */ |
| 1589 | extern VEC(breakpoint_p) *static_tracepoints_here (CORE_ADDR addr); |
| 1590 | |
| 1591 | /* Function that can be passed to read_command_line to validate |
| 1592 | that each command is suitable for tracepoint command list. */ |
| 1593 | extern void check_tracepoint_command (char *line, void *closure); |
| 1594 | |
| 1595 | /* Call at the start and end of an "rbreak" command to register |
| 1596 | breakpoint numbers for a later "commands" command. */ |
| 1597 | extern void start_rbreak_breakpoints (void); |
| 1598 | extern void end_rbreak_breakpoints (void); |
| 1599 | |
| 1600 | /* Breakpoint iterator function. |
| 1601 | |
| 1602 | Calls a callback function once for each breakpoint, so long as the |
| 1603 | callback function returns false. If the callback function returns |
| 1604 | true, the iteration will end and the current breakpoint will be |
| 1605 | returned. This can be useful for implementing a search for a |
| 1606 | breakpoint with arbitrary attributes, or for applying an operation |
| 1607 | to every breakpoint. */ |
| 1608 | extern struct breakpoint *iterate_over_breakpoints (int (*) (struct breakpoint *, |
| 1609 | void *), void *); |
| 1610 | |
| 1611 | /* Nonzero if the specified PC cannot be a location where functions |
| 1612 | have been inlined. */ |
| 1613 | |
| 1614 | extern int pc_at_non_inline_function (struct address_space *aspace, |
| 1615 | CORE_ADDR pc, |
| 1616 | const struct target_waitstatus *ws); |
| 1617 | |
| 1618 | extern int user_breakpoint_p (struct breakpoint *); |
| 1619 | |
| 1620 | /* Attempt to determine architecture of location identified by SAL. */ |
| 1621 | extern struct gdbarch *get_sal_arch (struct symtab_and_line sal); |
| 1622 | |
| 1623 | extern void breakpoint_free_objfile (struct objfile *objfile); |
| 1624 | |
| 1625 | extern char *ep_parse_optional_if_clause (char **arg); |
| 1626 | |
| 1627 | #endif /* !defined (BREAKPOINT_H) */ |