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611cb4a5 | 1 | /* Memory breakpoint operations for the remote server for GDB. |
1d506c26 | 2 | Copyright (C) 2002-2024 Free Software Foundation, Inc. |
611cb4a5 DJ |
3 | |
4 | Contributed by MontaVista Software. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
611cb4a5 DJ |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
611cb4a5 | 20 | |
9f3a5c85 LM |
21 | #include "regcache.h" |
22 | #include "ax.h" | |
611cb4a5 DJ |
23 | |
24 | #define MAX_BREAKPOINT_LEN 8 | |
25 | ||
ddcbc397 DB |
26 | /* Helper macro used in loops that append multiple items to a singly-linked |
27 | list instead of inserting items at the head of the list, as, say, in the | |
28 | breakpoint lists. LISTPP is a pointer to the pointer that is the head of | |
29 | the new list. ITEMP is a pointer to the item to be added to the list. | |
30 | TAILP must be defined to be the same type as ITEMP, and initialized to | |
31 | NULL. */ | |
32 | ||
33 | #define APPEND_TO_LIST(listpp, itemp, tailp) \ | |
34 | do \ | |
35 | { \ | |
36 | if ((tailp) == NULL) \ | |
37 | *(listpp) = (itemp); \ | |
38 | else \ | |
39 | (tailp)->next = (itemp); \ | |
40 | (tailp) = (itemp); \ | |
41 | } \ | |
42 | while (0) | |
43 | ||
8b07ae33 | 44 | /* GDB will never try to install multiple breakpoints at the same |
802e8e6d PA |
45 | address. However, we can see GDB requesting to insert a breakpoint |
46 | at an address is had already inserted one previously in a few | |
47 | situations. | |
48 | ||
49 | - The RSP documentation on Z packets says that to avoid potential | |
50 | problems with duplicate packets, the operations should be | |
51 | implemented in an idempotent way. | |
52 | ||
53 | - A breakpoint is set at ADDR, an address in a shared library. | |
54 | Then the shared library is unloaded. And then another, unrelated, | |
55 | breakpoint at ADDR is set. There is not breakpoint removal request | |
56 | between the first and the second breakpoint. | |
57 | ||
58 | - When GDB wants to update the target-side breakpoint conditions or | |
59 | commands, it re-inserts the breakpoint, with updated | |
60 | conditions/commands associated. | |
61 | ||
62 | Also, we need to keep track of internal breakpoints too, so we do | |
63 | need to be able to install multiple breakpoints at the same address | |
64 | transparently. | |
65 | ||
66 | We keep track of two different, and closely related structures. A | |
67 | raw breakpoint, which manages the low level, close to the metal | |
68 | aspect of a breakpoint. It holds the breakpoint address, and for | |
69 | software breakpoints, a buffer holding a copy of the instructions | |
8b07ae33 PA |
70 | that would be in memory had not been a breakpoint there (we call |
71 | that the shadow memory of the breakpoint). We occasionally need to | |
33b5899f | 72 | temporarily uninsert a breakpoint without the client knowing about |
8b07ae33 PA |
73 | it (e.g., to step over an internal breakpoint), so we keep an |
74 | `inserted' state associated with this low level breakpoint | |
75 | structure. There can only be one such object for a given address. | |
76 | Then, we have (a bit higher level) breakpoints. This structure | |
77 | holds a callback to be called whenever a breakpoint is hit, a | |
78 | high-level type, and a link to a low level raw breakpoint. There | |
79 | can be many high-level breakpoints at the same address, and all of | |
80 | them will point to the same raw breakpoint, which is reference | |
81 | counted. */ | |
82 | ||
83 | /* The low level, physical, raw breakpoint. */ | |
84 | struct raw_breakpoint | |
85 | { | |
86 | struct raw_breakpoint *next; | |
87 | ||
802e8e6d PA |
88 | /* The low level type of the breakpoint (software breakpoint, |
89 | watchpoint, etc.) */ | |
90 | enum raw_bkpt_type raw_type; | |
91 | ||
8b07ae33 PA |
92 | /* A reference count. Each high level breakpoint referencing this |
93 | raw breakpoint accounts for one reference. */ | |
94 | int refcount; | |
95 | ||
96 | /* The breakpoint's insertion address. There can only be one raw | |
97 | breakpoint for a given PC. */ | |
98 | CORE_ADDR pc; | |
99 | ||
27165294 AT |
100 | /* The breakpoint's kind. This is target specific. Most |
101 | architectures only use one specific instruction for breakpoints, while | |
102 | others may use more than one. E.g., on ARM, we need to use different | |
103 | breakpoint instructions on Thumb, Thumb-2, and ARM code. Likewise for | |
104 | hardware breakpoints -- some architectures (including ARM) need to | |
105 | setup debug registers differently depending on mode. */ | |
106 | int kind; | |
802e8e6d | 107 | |
8b07ae33 PA |
108 | /* The breakpoint's shadow memory. */ |
109 | unsigned char old_data[MAX_BREAKPOINT_LEN]; | |
110 | ||
802e8e6d PA |
111 | /* Positive if this breakpoint is currently inserted in the |
112 | inferior. Negative if it was, but we've detected that it's now | |
113 | gone. Zero if not inserted. */ | |
8b07ae33 PA |
114 | int inserted; |
115 | }; | |
116 | ||
414a389f PA |
117 | /* The type of a breakpoint. */ |
118 | enum bkpt_type | |
119 | { | |
8b07ae33 | 120 | /* A GDB breakpoint, requested with a Z0 packet. */ |
802e8e6d PA |
121 | gdb_breakpoint_Z0, |
122 | ||
123 | /* A GDB hardware breakpoint, requested with a Z1 packet. */ | |
124 | gdb_breakpoint_Z1, | |
125 | ||
126 | /* A GDB write watchpoint, requested with a Z2 packet. */ | |
127 | gdb_breakpoint_Z2, | |
128 | ||
129 | /* A GDB read watchpoint, requested with a Z3 packet. */ | |
130 | gdb_breakpoint_Z3, | |
131 | ||
132 | /* A GDB access watchpoint, requested with a Z4 packet. */ | |
133 | gdb_breakpoint_Z4, | |
8b07ae33 | 134 | |
3b9a79ef YQ |
135 | /* A software single-step breakpoint. */ |
136 | single_step_breakpoint, | |
414a389f PA |
137 | |
138 | /* Any other breakpoint type that doesn't require specific | |
139 | treatment goes here. E.g., an event breakpoint. */ | |
140 | other_breakpoint, | |
141 | }; | |
142 | ||
9f3a5c85 LM |
143 | struct point_cond_list |
144 | { | |
145 | /* Pointer to the agent expression that is the breakpoint's | |
146 | conditional. */ | |
147 | struct agent_expr *cond; | |
148 | ||
149 | /* Pointer to the next condition. */ | |
150 | struct point_cond_list *next; | |
151 | }; | |
152 | ||
d3ce09f5 SS |
153 | struct point_command_list |
154 | { | |
155 | /* Pointer to the agent expression that is the breakpoint's | |
156 | commands. */ | |
157 | struct agent_expr *cmd; | |
158 | ||
159 | /* Flag that is true if this command should run even while GDB is | |
160 | disconnected. */ | |
161 | int persistence; | |
162 | ||
163 | /* Pointer to the next command. */ | |
164 | struct point_command_list *next; | |
165 | }; | |
166 | ||
8b07ae33 | 167 | /* A high level (in gdbserver's perspective) breakpoint. */ |
611cb4a5 DJ |
168 | struct breakpoint |
169 | { | |
170 | struct breakpoint *next; | |
611cb4a5 | 171 | |
414a389f PA |
172 | /* The breakpoint's type. */ |
173 | enum bkpt_type type; | |
174 | ||
9aa76cd0 YQ |
175 | /* Link to this breakpoint's raw breakpoint. This is always |
176 | non-NULL. */ | |
177 | struct raw_breakpoint *raw; | |
178 | }; | |
179 | ||
180 | /* Breakpoint requested by GDB. */ | |
181 | ||
182 | struct gdb_breakpoint | |
183 | { | |
184 | struct breakpoint base; | |
185 | ||
9f3a5c85 LM |
186 | /* Pointer to the condition list that should be evaluated on |
187 | the target or NULL if the breakpoint is unconditional or | |
188 | if GDB doesn't want us to evaluate the conditionals on the | |
189 | target's side. */ | |
190 | struct point_cond_list *cond_list; | |
191 | ||
d3ce09f5 SS |
192 | /* Point to the list of commands to run when this is hit. */ |
193 | struct point_command_list *command_list; | |
9aa76cd0 | 194 | }; |
d3ce09f5 | 195 | |
9aa76cd0 YQ |
196 | /* Breakpoint used by GDBserver. */ |
197 | ||
198 | struct other_breakpoint | |
199 | { | |
200 | struct breakpoint base; | |
8b07ae33 | 201 | |
b65d95c5 | 202 | /* Function to call when we hit this breakpoint. If it returns 1, |
8b07ae33 PA |
203 | the breakpoint shall be deleted; 0 or if this callback is NULL, |
204 | it will be left inserted. */ | |
b65d95c5 | 205 | int (*handler) (CORE_ADDR); |
611cb4a5 DJ |
206 | }; |
207 | ||
3b9a79ef | 208 | /* Breakpoint for single step. */ |
9aa76cd0 | 209 | |
3b9a79ef | 210 | struct single_step_breakpoint |
9aa76cd0 YQ |
211 | { |
212 | struct breakpoint base; | |
bec903c9 YQ |
213 | |
214 | /* Thread the reinsert breakpoint belongs to. */ | |
215 | ptid_t ptid; | |
9aa76cd0 YQ |
216 | }; |
217 | ||
27165294 AT |
218 | /* Return the breakpoint size from its kind. */ |
219 | ||
220 | static int | |
221 | bp_size (struct raw_breakpoint *bp) | |
222 | { | |
223 | int size = 0; | |
224 | ||
52405d85 | 225 | the_target->sw_breakpoint_from_kind (bp->kind, &size); |
27165294 AT |
226 | return size; |
227 | } | |
228 | ||
229 | /* Return the breakpoint opcode from its kind. */ | |
230 | ||
231 | static const gdb_byte * | |
232 | bp_opcode (struct raw_breakpoint *bp) | |
233 | { | |
234 | int size = 0; | |
235 | ||
52405d85 | 236 | return the_target->sw_breakpoint_from_kind (bp->kind, &size); |
27165294 AT |
237 | } |
238 | ||
802e8e6d PA |
239 | /* See mem-break.h. */ |
240 | ||
932539e3 | 241 | enum target_hw_bp_type |
802e8e6d | 242 | raw_bkpt_type_to_target_hw_bp_type (enum raw_bkpt_type raw_type) |
932539e3 | 243 | { |
802e8e6d | 244 | switch (raw_type) |
932539e3 | 245 | { |
802e8e6d | 246 | case raw_bkpt_type_hw: |
932539e3 | 247 | return hw_execute; |
802e8e6d | 248 | case raw_bkpt_type_write_wp: |
932539e3 | 249 | return hw_write; |
802e8e6d | 250 | case raw_bkpt_type_read_wp: |
932539e3 | 251 | return hw_read; |
802e8e6d | 252 | case raw_bkpt_type_access_wp: |
932539e3 PA |
253 | return hw_access; |
254 | default: | |
f34652de | 255 | internal_error ("bad raw breakpoint type %d", (int) raw_type); |
802e8e6d PA |
256 | } |
257 | } | |
258 | ||
259 | /* See mem-break.h. */ | |
260 | ||
261 | static enum bkpt_type | |
262 | Z_packet_to_bkpt_type (char z_type) | |
263 | { | |
264 | gdb_assert ('0' <= z_type && z_type <= '4'); | |
265 | ||
d2412fa5 | 266 | return (enum bkpt_type) (gdb_breakpoint_Z0 + (z_type - '0')); |
802e8e6d PA |
267 | } |
268 | ||
269 | /* See mem-break.h. */ | |
270 | ||
271 | enum raw_bkpt_type | |
272 | Z_packet_to_raw_bkpt_type (char z_type) | |
273 | { | |
274 | switch (z_type) | |
275 | { | |
276 | case Z_PACKET_SW_BP: | |
277 | return raw_bkpt_type_sw; | |
278 | case Z_PACKET_HW_BP: | |
279 | return raw_bkpt_type_hw; | |
280 | case Z_PACKET_WRITE_WP: | |
281 | return raw_bkpt_type_write_wp; | |
282 | case Z_PACKET_READ_WP: | |
283 | return raw_bkpt_type_read_wp; | |
284 | case Z_PACKET_ACCESS_WP: | |
285 | return raw_bkpt_type_access_wp; | |
286 | default: | |
287 | gdb_assert_not_reached ("unhandled Z packet type."); | |
932539e3 PA |
288 | } |
289 | } | |
290 | ||
9aa76cd0 YQ |
291 | /* Return true if breakpoint TYPE is a GDB breakpoint. */ |
292 | ||
293 | static int | |
294 | is_gdb_breakpoint (enum bkpt_type type) | |
295 | { | |
296 | return (type == gdb_breakpoint_Z0 | |
297 | || type == gdb_breakpoint_Z1 | |
298 | || type == gdb_breakpoint_Z2 | |
299 | || type == gdb_breakpoint_Z3 | |
300 | || type == gdb_breakpoint_Z4); | |
301 | } | |
302 | ||
31445d10 PA |
303 | bool |
304 | any_persistent_commands (process_info *proc) | |
d3ce09f5 | 305 | { |
d3ce09f5 SS |
306 | struct breakpoint *bp; |
307 | struct point_command_list *cl; | |
308 | ||
309 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
310 | { | |
9aa76cd0 YQ |
311 | if (is_gdb_breakpoint (bp->type)) |
312 | { | |
313 | struct gdb_breakpoint *gdb_bp = (struct gdb_breakpoint *) bp; | |
314 | ||
315 | for (cl = gdb_bp->command_list; cl != NULL; cl = cl->next) | |
316 | if (cl->persistence) | |
31445d10 | 317 | return true; |
9aa76cd0 | 318 | } |
d3ce09f5 SS |
319 | } |
320 | ||
31445d10 | 321 | return false; |
d3ce09f5 SS |
322 | } |
323 | ||
802e8e6d PA |
324 | /* Find low-level breakpoint of type TYPE at address ADDR that is not |
325 | insert-disabled. Returns NULL if not found. */ | |
326 | ||
8b07ae33 | 327 | static struct raw_breakpoint * |
802e8e6d | 328 | find_enabled_raw_code_breakpoint_at (CORE_ADDR addr, enum raw_bkpt_type type) |
8b07ae33 PA |
329 | { |
330 | struct process_info *proc = current_process (); | |
331 | struct raw_breakpoint *bp; | |
414a389f | 332 | |
8b07ae33 | 333 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
802e8e6d PA |
334 | if (bp->pc == addr |
335 | && bp->raw_type == type | |
336 | && bp->inserted >= 0) | |
8b07ae33 PA |
337 | return bp; |
338 | ||
339 | return NULL; | |
340 | } | |
341 | ||
802e8e6d PA |
342 | /* Find low-level breakpoint of type TYPE at address ADDR. Returns |
343 | NULL if not found. */ | |
344 | ||
8b07ae33 | 345 | static struct raw_breakpoint * |
27165294 | 346 | find_raw_breakpoint_at (CORE_ADDR addr, enum raw_bkpt_type type, int kind) |
611cb4a5 | 347 | { |
95954743 | 348 | struct process_info *proc = current_process (); |
8b07ae33 | 349 | struct raw_breakpoint *bp; |
802e8e6d PA |
350 | |
351 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
27165294 | 352 | if (bp->pc == addr && bp->raw_type == type && bp->kind == kind) |
802e8e6d PA |
353 | return bp; |
354 | ||
355 | return NULL; | |
356 | } | |
357 | ||
358 | /* See mem-break.h. */ | |
359 | ||
360 | int | |
361 | insert_memory_breakpoint (struct raw_breakpoint *bp) | |
362 | { | |
6bf36717 | 363 | unsigned char buf[MAX_BREAKPOINT_LEN]; |
802e8e6d | 364 | int err; |
611cb4a5 | 365 | |
fa593d66 PA |
366 | /* Note that there can be fast tracepoint jumps installed in the |
367 | same memory range, so to get at the original memory, we need to | |
368 | use read_inferior_memory, which masks those out. */ | |
27165294 | 369 | err = read_inferior_memory (bp->pc, buf, bp_size (bp)); |
d50171e4 PA |
370 | if (err != 0) |
371 | { | |
c058728c SM |
372 | threads_debug_printf ("Failed to read shadow memory of" |
373 | " breakpoint at 0x%s (%s).", | |
374 | paddress (bp->pc), safe_strerror (err)); | |
d50171e4 | 375 | } |
802e8e6d PA |
376 | else |
377 | { | |
27165294 | 378 | memcpy (bp->old_data, buf, bp_size (bp)); |
611cb4a5 | 379 | |
52405d85 TBA |
380 | err = the_target->write_memory (bp->pc, bp_opcode (bp), |
381 | bp_size (bp)); | |
802e8e6d | 382 | if (err != 0) |
c058728c SM |
383 | threads_debug_printf ("Failed to insert breakpoint at 0x%s (%s).", |
384 | paddress (bp->pc), safe_strerror (err)); | |
802e8e6d PA |
385 | } |
386 | return err != 0 ? -1 : 0; | |
387 | } | |
388 | ||
389 | /* See mem-break.h */ | |
390 | ||
391 | int | |
392 | remove_memory_breakpoint (struct raw_breakpoint *bp) | |
393 | { | |
394 | unsigned char buf[MAX_BREAKPOINT_LEN]; | |
395 | int err; | |
396 | ||
397 | /* Since there can be trap breakpoints inserted in the same address | |
4196ab2a | 398 | range, we use `target_write_memory', which takes care of |
802e8e6d PA |
399 | layering breakpoints on top of fast tracepoints, and on top of |
400 | the buffer we pass it. This works because the caller has already | |
401 | either unlinked the breakpoint or marked it uninserted. Also | |
402 | note that we need to pass the current shadow contents, because | |
4196ab2a | 403 | target_write_memory updates any shadow memory with what we pass |
802e8e6d | 404 | here, and we want that to be a nop. */ |
27165294 | 405 | memcpy (buf, bp->old_data, bp_size (bp)); |
4196ab2a | 406 | err = target_write_memory (bp->pc, buf, bp_size (bp)); |
d50171e4 | 407 | if (err != 0) |
c058728c SM |
408 | threads_debug_printf ("Failed to uninsert raw breakpoint " |
409 | "at 0x%s (%s) while deleting it.", | |
410 | paddress (bp->pc), safe_strerror (err)); | |
411 | ||
802e8e6d PA |
412 | return err != 0 ? -1 : 0; |
413 | } | |
414 | ||
27165294 | 415 | /* Set a RAW breakpoint of type TYPE and kind KIND at WHERE. On |
802e8e6d PA |
416 | success, a pointer to the new breakpoint is returned. On failure, |
417 | returns NULL and writes the error code to *ERR. */ | |
418 | ||
419 | static struct raw_breakpoint * | |
27165294 | 420 | set_raw_breakpoint_at (enum raw_bkpt_type type, CORE_ADDR where, int kind, |
802e8e6d PA |
421 | int *err) |
422 | { | |
423 | struct process_info *proc = current_process (); | |
424 | struct raw_breakpoint *bp; | |
425 | ||
426 | if (type == raw_bkpt_type_sw || type == raw_bkpt_type_hw) | |
427 | { | |
428 | bp = find_enabled_raw_code_breakpoint_at (where, type); | |
27165294 | 429 | if (bp != NULL && bp->kind != kind) |
802e8e6d | 430 | { |
27165294 | 431 | /* A different kind than previously seen. The previous |
802e8e6d | 432 | breakpoint must be gone then. */ |
c058728c SM |
433 | threads_debug_printf |
434 | ("Inconsistent breakpoint kind? Was %d, now %d.", | |
435 | bp->kind, kind); | |
802e8e6d PA |
436 | bp->inserted = -1; |
437 | bp = NULL; | |
438 | } | |
439 | } | |
440 | else | |
27165294 | 441 | bp = find_raw_breakpoint_at (where, type, kind); |
802e8e6d | 442 | |
45dd3607 | 443 | gdb::unique_xmalloc_ptr<struct raw_breakpoint> bp_holder; |
20249ae4 | 444 | if (bp == NULL) |
802e8e6d | 445 | { |
45dd3607 TT |
446 | bp_holder.reset (XCNEW (struct raw_breakpoint)); |
447 | bp = bp_holder.get (); | |
20249ae4 YQ |
448 | bp->pc = where; |
449 | bp->kind = kind; | |
450 | bp->raw_type = type; | |
802e8e6d PA |
451 | } |
452 | ||
20249ae4 | 453 | if (!bp->inserted) |
802e8e6d | 454 | { |
52405d85 | 455 | *err = the_target->insert_point (bp->raw_type, bp->pc, bp->kind, bp); |
20249ae4 YQ |
456 | if (*err != 0) |
457 | { | |
c058728c SM |
458 | threads_debug_printf ("Failed to insert breakpoint at 0x%s (%d).", |
459 | paddress (where), *err); | |
20249ae4 | 460 | |
20249ae4 YQ |
461 | return NULL; |
462 | } | |
463 | ||
464 | bp->inserted = 1; | |
d50171e4 PA |
465 | } |
466 | ||
45dd3607 TT |
467 | /* If the breakpoint was allocated above, we know we want to keep it |
468 | now. */ | |
469 | bp_holder.release (); | |
20249ae4 YQ |
470 | |
471 | /* Link the breakpoint in, if this is the first reference. */ | |
472 | if (++bp->refcount == 1) | |
473 | { | |
474 | bp->next = proc->raw_breakpoints; | |
475 | proc->raw_breakpoints = bp; | |
476 | } | |
d50171e4 PA |
477 | return bp; |
478 | } | |
479 | ||
fa593d66 PA |
480 | /* Notice that breakpoint traps are always installed on top of fast |
481 | tracepoint jumps. This is even if the fast tracepoint is installed | |
482 | at a later time compared to when the breakpoint was installed. | |
483 | This means that a stopping breakpoint or tracepoint has higher | |
484 | "priority". In turn, this allows having fast and slow tracepoints | |
485 | (and breakpoints) at the same address behave correctly. */ | |
486 | ||
487 | ||
488 | /* A fast tracepoint jump. */ | |
489 | ||
490 | struct fast_tracepoint_jump | |
491 | { | |
492 | struct fast_tracepoint_jump *next; | |
493 | ||
494 | /* A reference count. GDB can install more than one fast tracepoint | |
495 | at the same address (each with its own action list, for | |
496 | example). */ | |
497 | int refcount; | |
498 | ||
499 | /* The fast tracepoint's insertion address. There can only be one | |
500 | of these for a given PC. */ | |
501 | CORE_ADDR pc; | |
502 | ||
503 | /* Non-zero if this fast tracepoint jump is currently inserted in | |
504 | the inferior. */ | |
505 | int inserted; | |
506 | ||
507 | /* The length of the jump instruction. */ | |
508 | int length; | |
509 | ||
510 | /* A poor-man's flexible array member, holding both the jump | |
511 | instruction to insert, and a copy of the instruction that would | |
512 | be in memory had not been a jump there (the shadow memory of the | |
513 | tracepoint jump). */ | |
514 | unsigned char insn_and_shadow[0]; | |
515 | }; | |
516 | ||
517 | /* Fast tracepoint FP's jump instruction to insert. */ | |
518 | #define fast_tracepoint_jump_insn(fp) \ | |
519 | ((fp)->insn_and_shadow + 0) | |
520 | ||
521 | /* The shadow memory of fast tracepoint jump FP. */ | |
522 | #define fast_tracepoint_jump_shadow(fp) \ | |
523 | ((fp)->insn_and_shadow + (fp)->length) | |
524 | ||
525 | ||
526 | /* Return the fast tracepoint jump set at WHERE. */ | |
527 | ||
528 | static struct fast_tracepoint_jump * | |
529 | find_fast_tracepoint_jump_at (CORE_ADDR where) | |
530 | { | |
531 | struct process_info *proc = current_process (); | |
532 | struct fast_tracepoint_jump *jp; | |
533 | ||
534 | for (jp = proc->fast_tracepoint_jumps; jp != NULL; jp = jp->next) | |
535 | if (jp->pc == where) | |
536 | return jp; | |
537 | ||
538 | return NULL; | |
539 | } | |
540 | ||
541 | int | |
542 | fast_tracepoint_jump_here (CORE_ADDR where) | |
543 | { | |
544 | struct fast_tracepoint_jump *jp = find_fast_tracepoint_jump_at (where); | |
545 | ||
546 | return (jp != NULL); | |
547 | } | |
548 | ||
549 | int | |
550 | delete_fast_tracepoint_jump (struct fast_tracepoint_jump *todel) | |
551 | { | |
552 | struct fast_tracepoint_jump *bp, **bp_link; | |
553 | int ret; | |
554 | struct process_info *proc = current_process (); | |
555 | ||
556 | bp = proc->fast_tracepoint_jumps; | |
557 | bp_link = &proc->fast_tracepoint_jumps; | |
558 | ||
559 | while (bp) | |
560 | { | |
561 | if (bp == todel) | |
562 | { | |
563 | if (--bp->refcount == 0) | |
564 | { | |
565 | struct fast_tracepoint_jump *prev_bp_link = *bp_link; | |
6bf36717 | 566 | unsigned char *buf; |
fa593d66 PA |
567 | |
568 | /* Unlink it. */ | |
569 | *bp_link = bp->next; | |
570 | ||
571 | /* Since there can be breakpoints inserted in the same | |
4196ab2a | 572 | address range, we use `target_write_memory', which |
fa593d66 PA |
573 | takes care of layering breakpoints on top of fast |
574 | tracepoints, and on top of the buffer we pass it. | |
575 | This works because we've already unlinked the fast | |
576 | tracepoint jump above. Also note that we need to | |
577 | pass the current shadow contents, because | |
4196ab2a | 578 | target_write_memory updates any shadow memory with |
fa593d66 | 579 | what we pass here, and we want that to be a nop. */ |
224c3ddb | 580 | buf = (unsigned char *) alloca (bp->length); |
6bf36717 | 581 | memcpy (buf, fast_tracepoint_jump_shadow (bp), bp->length); |
4196ab2a | 582 | ret = target_write_memory (bp->pc, buf, bp->length); |
fa593d66 PA |
583 | if (ret != 0) |
584 | { | |
585 | /* Something went wrong, relink the jump. */ | |
586 | *bp_link = prev_bp_link; | |
587 | ||
c058728c SM |
588 | threads_debug_printf |
589 | ("Failed to uninsert fast tracepoint jump " | |
590 | "at 0x%s (%s) while deleting it.", | |
591 | paddress (bp->pc), safe_strerror (ret)); | |
fa593d66 PA |
592 | return ret; |
593 | } | |
594 | ||
595 | free (bp); | |
596 | } | |
597 | ||
598 | return 0; | |
599 | } | |
600 | else | |
601 | { | |
602 | bp_link = &bp->next; | |
603 | bp = *bp_link; | |
604 | } | |
605 | } | |
606 | ||
607 | warning ("Could not find fast tracepoint jump in list."); | |
608 | return ENOENT; | |
609 | } | |
610 | ||
5c73ff4e YQ |
611 | void |
612 | inc_ref_fast_tracepoint_jump (struct fast_tracepoint_jump *jp) | |
613 | { | |
614 | jp->refcount++; | |
615 | } | |
616 | ||
fa593d66 PA |
617 | struct fast_tracepoint_jump * |
618 | set_fast_tracepoint_jump (CORE_ADDR where, | |
619 | unsigned char *insn, ULONGEST length) | |
620 | { | |
621 | struct process_info *proc = current_process (); | |
622 | struct fast_tracepoint_jump *jp; | |
623 | int err; | |
6bf36717 | 624 | unsigned char *buf; |
fa593d66 PA |
625 | |
626 | /* We refcount fast tracepoint jumps. Check if we already know | |
627 | about a jump at this address. */ | |
628 | jp = find_fast_tracepoint_jump_at (where); | |
629 | if (jp != NULL) | |
630 | { | |
631 | jp->refcount++; | |
632 | return jp; | |
633 | } | |
634 | ||
635 | /* We don't, so create a new object. Double the length, because the | |
636 | flexible array member holds both the jump insn, and the | |
637 | shadow. */ | |
224c3ddb | 638 | jp = (struct fast_tracepoint_jump *) xcalloc (1, sizeof (*jp) + (length * 2)); |
fa593d66 PA |
639 | jp->pc = where; |
640 | jp->length = length; | |
641 | memcpy (fast_tracepoint_jump_insn (jp), insn, length); | |
642 | jp->refcount = 1; | |
224c3ddb | 643 | buf = (unsigned char *) alloca (length); |
fa593d66 PA |
644 | |
645 | /* Note that there can be trap breakpoints inserted in the same | |
646 | address range. To access the original memory contents, we use | |
647 | `read_inferior_memory', which masks out breakpoints. */ | |
6bf36717 | 648 | err = read_inferior_memory (where, buf, length); |
fa593d66 PA |
649 | if (err != 0) |
650 | { | |
c058728c SM |
651 | threads_debug_printf ("Failed to read shadow memory of" |
652 | " fast tracepoint at 0x%s (%s).", | |
653 | paddress (where), safe_strerror (err)); | |
fa593d66 PA |
654 | free (jp); |
655 | return NULL; | |
656 | } | |
6bf36717 | 657 | memcpy (fast_tracepoint_jump_shadow (jp), buf, length); |
fa593d66 PA |
658 | |
659 | /* Link the jump in. */ | |
660 | jp->inserted = 1; | |
661 | jp->next = proc->fast_tracepoint_jumps; | |
662 | proc->fast_tracepoint_jumps = jp; | |
663 | ||
664 | /* Since there can be trap breakpoints inserted in the same address | |
4196ab2a | 665 | range, we use use `target_write_memory', which takes care of |
fa593d66 PA |
666 | layering breakpoints on top of fast tracepoints, on top of the |
667 | buffer we pass it. This works because we've already linked in | |
668 | the fast tracepoint jump above. Also note that we need to pass | |
4196ab2a | 669 | the current shadow contents, because target_write_memory |
fa593d66 PA |
670 | updates any shadow memory with what we pass here, and we want |
671 | that to be a nop. */ | |
4196ab2a | 672 | err = target_write_memory (where, buf, length); |
fa593d66 PA |
673 | if (err != 0) |
674 | { | |
c058728c SM |
675 | threads_debug_printf |
676 | ("Failed to insert fast tracepoint jump at 0x%s (%s).", | |
677 | paddress (where), safe_strerror (err)); | |
fa593d66 PA |
678 | |
679 | /* Unlink it. */ | |
680 | proc->fast_tracepoint_jumps = jp->next; | |
681 | free (jp); | |
682 | ||
683 | return NULL; | |
684 | } | |
685 | ||
686 | return jp; | |
687 | } | |
688 | ||
689 | void | |
690 | uninsert_fast_tracepoint_jumps_at (CORE_ADDR pc) | |
691 | { | |
692 | struct fast_tracepoint_jump *jp; | |
693 | int err; | |
694 | ||
695 | jp = find_fast_tracepoint_jump_at (pc); | |
696 | if (jp == NULL) | |
697 | { | |
698 | /* This can happen when we remove all breakpoints while handling | |
699 | a step-over. */ | |
c058728c SM |
700 | threads_debug_printf ("Could not find fast tracepoint jump at 0x%s " |
701 | "in list (uninserting).", | |
702 | paddress (pc)); | |
fa593d66 PA |
703 | return; |
704 | } | |
705 | ||
706 | if (jp->inserted) | |
707 | { | |
6bf36717 JK |
708 | unsigned char *buf; |
709 | ||
fa593d66 PA |
710 | jp->inserted = 0; |
711 | ||
712 | /* Since there can be trap breakpoints inserted in the same | |
4196ab2a | 713 | address range, we use use `target_write_memory', which |
fa593d66 PA |
714 | takes care of layering breakpoints on top of fast |
715 | tracepoints, and on top of the buffer we pass it. This works | |
716 | because we've already marked the fast tracepoint fast | |
717 | tracepoint jump uninserted above. Also note that we need to | |
718 | pass the current shadow contents, because | |
4196ab2a | 719 | target_write_memory updates any shadow memory with what we |
fa593d66 | 720 | pass here, and we want that to be a nop. */ |
224c3ddb | 721 | buf = (unsigned char *) alloca (jp->length); |
6bf36717 | 722 | memcpy (buf, fast_tracepoint_jump_shadow (jp), jp->length); |
4196ab2a | 723 | err = target_write_memory (jp->pc, buf, jp->length); |
fa593d66 PA |
724 | if (err != 0) |
725 | { | |
726 | jp->inserted = 1; | |
727 | ||
c058728c SM |
728 | threads_debug_printf ("Failed to uninsert fast tracepoint jump at" |
729 | " 0x%s (%s).", | |
730 | paddress (pc), safe_strerror (err)); | |
fa593d66 PA |
731 | } |
732 | } | |
733 | } | |
734 | ||
735 | void | |
736 | reinsert_fast_tracepoint_jumps_at (CORE_ADDR where) | |
737 | { | |
738 | struct fast_tracepoint_jump *jp; | |
739 | int err; | |
6bf36717 | 740 | unsigned char *buf; |
fa593d66 PA |
741 | |
742 | jp = find_fast_tracepoint_jump_at (where); | |
743 | if (jp == NULL) | |
744 | { | |
745 | /* This can happen when we remove breakpoints when a tracepoint | |
746 | hit causes a tracing stop, while handling a step-over. */ | |
c058728c SM |
747 | threads_debug_printf ("Could not find fast tracepoint jump at 0x%s " |
748 | "in list (reinserting).", | |
749 | paddress (where)); | |
fa593d66 PA |
750 | return; |
751 | } | |
752 | ||
753 | if (jp->inserted) | |
754 | error ("Jump already inserted at reinsert time."); | |
755 | ||
756 | jp->inserted = 1; | |
757 | ||
758 | /* Since there can be trap breakpoints inserted in the same address | |
4196ab2a | 759 | range, we use `target_write_memory', which takes care of |
fa593d66 PA |
760 | layering breakpoints on top of fast tracepoints, and on top of |
761 | the buffer we pass it. This works because we've already marked | |
762 | the fast tracepoint jump inserted above. Also note that we need | |
763 | to pass the current shadow contents, because | |
4196ab2a | 764 | target_write_memory updates any shadow memory with what we pass |
fa593d66 | 765 | here, and we want that to be a nop. */ |
224c3ddb | 766 | buf = (unsigned char *) alloca (jp->length); |
6bf36717 | 767 | memcpy (buf, fast_tracepoint_jump_shadow (jp), jp->length); |
4196ab2a | 768 | err = target_write_memory (where, buf, jp->length); |
fa593d66 PA |
769 | if (err != 0) |
770 | { | |
771 | jp->inserted = 0; | |
772 | ||
c058728c SM |
773 | threads_debug_printf ("Failed to reinsert fast tracepoint jump at" |
774 | " 0x%s (%s).", | |
775 | paddress (where), safe_strerror (err)); | |
fa593d66 PA |
776 | } |
777 | } | |
778 | ||
802e8e6d | 779 | /* Set a high-level breakpoint of type TYPE, with low level type |
27165294 | 780 | RAW_TYPE and kind KIND, at WHERE. On success, a pointer to the new |
802e8e6d PA |
781 | breakpoint is returned. On failure, returns NULL and writes the |
782 | error code to *ERR. HANDLER is called when the breakpoint is hit. | |
783 | HANDLER should return 1 if the breakpoint should be deleted, 0 | |
784 | otherwise. */ | |
785 | ||
786 | static struct breakpoint * | |
787 | set_breakpoint (enum bkpt_type type, enum raw_bkpt_type raw_type, | |
27165294 | 788 | CORE_ADDR where, int kind, |
802e8e6d | 789 | int (*handler) (CORE_ADDR), int *err) |
d50171e4 PA |
790 | { |
791 | struct process_info *proc = current_process (); | |
792 | struct breakpoint *bp; | |
8b07ae33 | 793 | struct raw_breakpoint *raw; |
d50171e4 | 794 | |
27165294 | 795 | raw = set_raw_breakpoint_at (raw_type, where, kind, err); |
d50171e4 | 796 | |
8b07ae33 | 797 | if (raw == NULL) |
d50171e4 PA |
798 | { |
799 | /* warn? */ | |
414a389f | 800 | return NULL; |
d50171e4 PA |
801 | } |
802 | ||
9aa76cd0 YQ |
803 | if (is_gdb_breakpoint (type)) |
804 | { | |
805 | struct gdb_breakpoint *gdb_bp = XCNEW (struct gdb_breakpoint); | |
806 | ||
807 | bp = (struct breakpoint *) gdb_bp; | |
808 | gdb_assert (handler == NULL); | |
809 | } | |
810 | else if (type == other_breakpoint) | |
811 | { | |
812 | struct other_breakpoint *other_bp = XCNEW (struct other_breakpoint); | |
813 | ||
814 | other_bp->handler = handler; | |
815 | bp = (struct breakpoint *) other_bp; | |
816 | } | |
3b9a79ef | 817 | else if (type == single_step_breakpoint) |
9aa76cd0 | 818 | { |
3b9a79ef YQ |
819 | struct single_step_breakpoint *ss_bp |
820 | = XCNEW (struct single_step_breakpoint); | |
8b07ae33 | 821 | |
3b9a79ef | 822 | bp = (struct breakpoint *) ss_bp; |
9aa76cd0 YQ |
823 | } |
824 | else | |
825 | gdb_assert_not_reached ("unhandled breakpoint type"); | |
826 | ||
827 | bp->type = type; | |
8b07ae33 | 828 | bp->raw = raw; |
611cb4a5 | 829 | |
95954743 PA |
830 | bp->next = proc->breakpoints; |
831 | proc->breakpoints = bp; | |
414a389f PA |
832 | |
833 | return bp; | |
611cb4a5 DJ |
834 | } |
835 | ||
811f8301 | 836 | /* Set breakpoint of TYPE on address WHERE with handler HANDLER. */ |
802e8e6d | 837 | |
811f8301 YQ |
838 | static struct breakpoint * |
839 | set_breakpoint_type_at (enum bkpt_type type, CORE_ADDR where, | |
840 | int (*handler) (CORE_ADDR)) | |
802e8e6d PA |
841 | { |
842 | int err_ignored; | |
27165294 | 843 | CORE_ADDR placed_address = where; |
2e6ee069 | 844 | int breakpoint_kind = target_breakpoint_kind_from_pc (&placed_address); |
802e8e6d | 845 | |
811f8301 | 846 | return set_breakpoint (type, raw_bkpt_type_sw, |
27165294 | 847 | placed_address, breakpoint_kind, handler, |
802e8e6d PA |
848 | &err_ignored); |
849 | } | |
850 | ||
811f8301 YQ |
851 | /* See mem-break.h */ |
852 | ||
853 | struct breakpoint * | |
854 | set_breakpoint_at (CORE_ADDR where, int (*handler) (CORE_ADDR)) | |
855 | { | |
856 | return set_breakpoint_type_at (other_breakpoint, where, handler); | |
857 | } | |
858 | ||
802e8e6d | 859 | |
8b07ae33 PA |
860 | static int |
861 | delete_raw_breakpoint (struct process_info *proc, struct raw_breakpoint *todel) | |
862 | { | |
863 | struct raw_breakpoint *bp, **bp_link; | |
864 | int ret; | |
865 | ||
866 | bp = proc->raw_breakpoints; | |
867 | bp_link = &proc->raw_breakpoints; | |
868 | ||
869 | while (bp) | |
870 | { | |
871 | if (bp == todel) | |
872 | { | |
802e8e6d | 873 | if (bp->inserted > 0) |
8b07ae33 PA |
874 | { |
875 | struct raw_breakpoint *prev_bp_link = *bp_link; | |
876 | ||
877 | *bp_link = bp->next; | |
878 | ||
52405d85 TBA |
879 | ret = the_target->remove_point (bp->raw_type, bp->pc, |
880 | bp->kind, bp); | |
8b07ae33 PA |
881 | if (ret != 0) |
882 | { | |
883 | /* Something went wrong, relink the breakpoint. */ | |
884 | *bp_link = prev_bp_link; | |
885 | ||
c058728c SM |
886 | threads_debug_printf ("Failed to uninsert raw breakpoint " |
887 | "at 0x%s while deleting it.", | |
888 | paddress (bp->pc)); | |
8b07ae33 PA |
889 | return ret; |
890 | } | |
8b07ae33 PA |
891 | } |
892 | else | |
893 | *bp_link = bp->next; | |
894 | ||
895 | free (bp); | |
896 | return 0; | |
897 | } | |
898 | else | |
899 | { | |
900 | bp_link = &bp->next; | |
901 | bp = *bp_link; | |
902 | } | |
903 | } | |
904 | ||
905 | warning ("Could not find raw breakpoint in list."); | |
906 | return ENOENT; | |
907 | } | |
908 | ||
909 | static int | |
910 | release_breakpoint (struct process_info *proc, struct breakpoint *bp) | |
911 | { | |
912 | int newrefcount; | |
913 | int ret; | |
914 | ||
915 | newrefcount = bp->raw->refcount - 1; | |
916 | if (newrefcount == 0) | |
917 | { | |
918 | ret = delete_raw_breakpoint (proc, bp->raw); | |
919 | if (ret != 0) | |
920 | return ret; | |
921 | } | |
922 | else | |
923 | bp->raw->refcount = newrefcount; | |
924 | ||
925 | free (bp); | |
926 | ||
927 | return 0; | |
928 | } | |
929 | ||
930 | static int | |
931 | delete_breakpoint_1 (struct process_info *proc, struct breakpoint *todel) | |
611cb4a5 | 932 | { |
414a389f | 933 | struct breakpoint *bp, **bp_link; |
8b07ae33 | 934 | int err; |
611cb4a5 | 935 | |
414a389f PA |
936 | bp = proc->breakpoints; |
937 | bp_link = &proc->breakpoints; | |
938 | ||
939 | while (bp) | |
611cb4a5 | 940 | { |
414a389f | 941 | if (bp == todel) |
611cb4a5 | 942 | { |
414a389f PA |
943 | *bp_link = bp->next; |
944 | ||
8b07ae33 PA |
945 | err = release_breakpoint (proc, bp); |
946 | if (err != 0) | |
947 | return err; | |
948 | ||
949 | bp = *bp_link; | |
950 | return 0; | |
611cb4a5 | 951 | } |
414a389f PA |
952 | else |
953 | { | |
954 | bp_link = &bp->next; | |
955 | bp = *bp_link; | |
956 | } | |
611cb4a5 | 957 | } |
414a389f | 958 | |
611cb4a5 | 959 | warning ("Could not find breakpoint in list."); |
8b07ae33 PA |
960 | return ENOENT; |
961 | } | |
962 | ||
219f2f23 | 963 | int |
8b07ae33 PA |
964 | delete_breakpoint (struct breakpoint *todel) |
965 | { | |
966 | struct process_info *proc = current_process (); | |
967 | return delete_breakpoint_1 (proc, todel); | |
611cb4a5 DJ |
968 | } |
969 | ||
27165294 AT |
970 | /* Locate a GDB breakpoint of type Z_TYPE and kind KIND placed at |
971 | address ADDR and return a pointer to its structure. If KIND is -1, | |
972 | the breakpoint's kind is ignored. */ | |
51aa91f9 | 973 | |
9aa76cd0 | 974 | static struct gdb_breakpoint * |
27165294 | 975 | find_gdb_breakpoint (char z_type, CORE_ADDR addr, int kind) |
611cb4a5 | 976 | { |
95954743 | 977 | struct process_info *proc = current_process (); |
fd492bf1 AB |
978 | |
979 | /* In some situations the current process exits, we inform GDB, but | |
980 | before GDB can acknowledge that the process has exited GDB tries to | |
981 | detach from the inferior. As part of the detach process GDB will | |
982 | remove all breakpoints, which means we can end up here when the | |
983 | current process has already exited and so PROC is nullptr. In this | |
984 | case just claim we can't find (and so delete) the breakpoint, GDB | |
985 | will ignore this error during detach. */ | |
986 | if (proc == nullptr) | |
987 | return nullptr; | |
988 | ||
8b07ae33 | 989 | struct breakpoint *bp; |
802e8e6d | 990 | enum bkpt_type type = Z_packet_to_bkpt_type (z_type); |
611cb4a5 | 991 | |
8b07ae33 | 992 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) |
802e8e6d | 993 | if (bp->type == type && bp->raw->pc == addr |
27165294 | 994 | && (kind == -1 || bp->raw->kind == kind)) |
2583da7c | 995 | return (struct gdb_breakpoint *) bp; |
611cb4a5 DJ |
996 | |
997 | return NULL; | |
998 | } | |
999 | ||
802e8e6d PA |
1000 | static int |
1001 | z_type_supported (char z_type) | |
1002 | { | |
1003 | return (z_type >= '0' && z_type <= '4' | |
52405d85 | 1004 | && the_target->supports_z_point_type (z_type)); |
802e8e6d PA |
1005 | } |
1006 | ||
27165294 | 1007 | /* Create a new GDB breakpoint of type Z_TYPE at ADDR with kind KIND. |
802e8e6d PA |
1008 | Returns a pointer to the newly created breakpoint on success. On |
1009 | failure returns NULL and sets *ERR to either -1 for error, or 1 if | |
1010 | Z_TYPE breakpoints are not supported on this target. */ | |
1011 | ||
8e347faf PA |
1012 | struct gdb_breakpoint * |
1013 | set_gdb_breakpoint (char z_type, CORE_ADDR addr, int kind, int *err) | |
68070c10 | 1014 | { |
9aa76cd0 | 1015 | struct gdb_breakpoint *bp; |
802e8e6d PA |
1016 | enum bkpt_type type; |
1017 | enum raw_bkpt_type raw_type; | |
1018 | ||
8e347faf PA |
1019 | if (!z_type_supported (z_type)) |
1020 | { | |
1021 | *err = 1; | |
1022 | return nullptr; | |
1023 | } | |
1024 | ||
802e8e6d PA |
1025 | /* If we see GDB inserting a second code breakpoint at the same |
1026 | address, then either: GDB is updating the breakpoint's conditions | |
1027 | or commands; or, the first breakpoint must have disappeared due | |
1028 | to a shared library unload. On targets where the shared | |
1029 | libraries are handled by userspace, like SVR4, for example, | |
1030 | GDBserver can't tell if a library was loaded or unloaded. Since | |
1031 | we refcount raw breakpoints, we must be careful to make sure GDB | |
1032 | breakpoints never contribute more than one reference. if we | |
1033 | didn't do this, in case the previous breakpoint is gone due to a | |
1034 | shared library unload, we'd just increase the refcount of the | |
1035 | previous breakpoint at this address, but the trap was not planted | |
1036 | in the inferior anymore, thus the breakpoint would never be hit. | |
1037 | Note this must be careful to not create a window where | |
1038 | breakpoints are removed from the target, for non-stop, in case | |
1039 | the target can poke at memory while the program is running. */ | |
1040 | if (z_type == Z_PACKET_SW_BP | |
1041 | || z_type == Z_PACKET_HW_BP) | |
1042 | { | |
1043 | bp = find_gdb_breakpoint (z_type, addr, -1); | |
8b07ae33 | 1044 | |
802e8e6d PA |
1045 | if (bp != NULL) |
1046 | { | |
9aa76cd0 | 1047 | if (bp->base.raw->kind != kind) |
802e8e6d | 1048 | { |
27165294 | 1049 | /* A different kind than previously seen. The previous |
802e8e6d | 1050 | breakpoint must be gone then. */ |
9aa76cd0 YQ |
1051 | bp->base.raw->inserted = -1; |
1052 | delete_breakpoint ((struct breakpoint *) bp); | |
802e8e6d PA |
1053 | bp = NULL; |
1054 | } | |
1055 | else if (z_type == Z_PACKET_SW_BP) | |
1056 | { | |
1057 | /* Check if the breakpoint is actually gone from the | |
1058 | target, due to an solib unload, for example. Might | |
1059 | as well validate _all_ breakpoints. */ | |
1060 | validate_breakpoints (); | |
1061 | ||
1062 | /* Breakpoints that don't pass validation are | |
1063 | deleted. */ | |
1064 | bp = find_gdb_breakpoint (z_type, addr, -1); | |
1065 | } | |
1066 | } | |
1067 | } | |
1068 | else | |
1069 | { | |
27165294 | 1070 | /* Data breakpoints for the same address but different kind are |
802e8e6d PA |
1071 | expected. GDB doesn't merge these. The backend gets to do |
1072 | that if it wants/can. */ | |
27165294 | 1073 | bp = find_gdb_breakpoint (z_type, addr, kind); |
802e8e6d | 1074 | } |
8b07ae33 | 1075 | |
d3bbe7a0 PA |
1076 | if (bp != NULL) |
1077 | { | |
802e8e6d PA |
1078 | /* We already know about this breakpoint, there's nothing else |
1079 | to do - GDB's reference is already accounted for. Note that | |
1080 | whether the breakpoint inserted is left as is - we may be | |
1081 | stepping over it, for example, in which case we don't want to | |
1082 | force-reinsert it. */ | |
1083 | return bp; | |
1084 | } | |
1085 | ||
1086 | raw_type = Z_packet_to_raw_bkpt_type (z_type); | |
1087 | type = Z_packet_to_bkpt_type (z_type); | |
9aa76cd0 YQ |
1088 | return (struct gdb_breakpoint *) set_breakpoint (type, raw_type, addr, |
1089 | kind, NULL, err); | |
802e8e6d PA |
1090 | } |
1091 | ||
27165294 | 1092 | /* Delete a GDB breakpoint of type Z_TYPE and kind KIND previously |
802e8e6d PA |
1093 | inserted at ADDR with set_gdb_breakpoint_at. Returns 0 on success, |
1094 | -1 on error, and 1 if Z_TYPE breakpoints are not supported on this | |
1095 | target. */ | |
1096 | ||
8e347faf PA |
1097 | int |
1098 | delete_gdb_breakpoint (char z_type, CORE_ADDR addr, int kind) | |
8b07ae33 | 1099 | { |
8e347faf PA |
1100 | if (!z_type_supported (z_type)) |
1101 | return 1; | |
8b07ae33 | 1102 | |
8e347faf | 1103 | gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, kind); |
8b07ae33 PA |
1104 | if (bp == NULL) |
1105 | return -1; | |
1106 | ||
0a261ed8 PA |
1107 | /* Before deleting the breakpoint, make sure to free its condition |
1108 | and command lists. */ | |
1109 | clear_breakpoint_conditions_and_commands (bp); | |
8e347faf | 1110 | int err = delete_breakpoint ((struct breakpoint *) bp); |
802e8e6d | 1111 | if (err != 0) |
8b07ae33 PA |
1112 | return -1; |
1113 | ||
1114 | return 0; | |
1115 | } | |
1116 | ||
802e8e6d | 1117 | /* Clear all conditions associated with a breakpoint. */ |
9f3a5c85 | 1118 | |
0a261ed8 | 1119 | static void |
9aa76cd0 | 1120 | clear_breakpoint_conditions (struct gdb_breakpoint *bp) |
9f3a5c85 | 1121 | { |
412c89dd | 1122 | struct point_cond_list *cond; |
9f3a5c85 | 1123 | |
802e8e6d | 1124 | if (bp->cond_list == NULL) |
9f3a5c85 LM |
1125 | return; |
1126 | ||
1127 | cond = bp->cond_list; | |
9f3a5c85 LM |
1128 | |
1129 | while (cond != NULL) | |
1130 | { | |
412c89dd LM |
1131 | struct point_cond_list *cond_next; |
1132 | ||
1133 | cond_next = cond->next; | |
0a261ed8 | 1134 | gdb_free_agent_expr (cond->cond); |
9f3a5c85 | 1135 | free (cond); |
412c89dd | 1136 | cond = cond_next; |
9f3a5c85 LM |
1137 | } |
1138 | ||
1139 | bp->cond_list = NULL; | |
1140 | } | |
1141 | ||
0a261ed8 PA |
1142 | /* Clear all commands associated with a breakpoint. */ |
1143 | ||
1144 | static void | |
9aa76cd0 | 1145 | clear_breakpoint_commands (struct gdb_breakpoint *bp) |
0a261ed8 PA |
1146 | { |
1147 | struct point_command_list *cmd; | |
1148 | ||
1149 | if (bp->command_list == NULL) | |
1150 | return; | |
1151 | ||
1152 | cmd = bp->command_list; | |
1153 | ||
1154 | while (cmd != NULL) | |
1155 | { | |
1156 | struct point_command_list *cmd_next; | |
1157 | ||
1158 | cmd_next = cmd->next; | |
1159 | gdb_free_agent_expr (cmd->cmd); | |
1160 | free (cmd); | |
1161 | cmd = cmd_next; | |
1162 | } | |
1163 | ||
1164 | bp->command_list = NULL; | |
1165 | } | |
1166 | ||
1167 | void | |
9aa76cd0 | 1168 | clear_breakpoint_conditions_and_commands (struct gdb_breakpoint *bp) |
0a261ed8 PA |
1169 | { |
1170 | clear_breakpoint_conditions (bp); | |
1171 | clear_breakpoint_commands (bp); | |
1172 | } | |
1173 | ||
9f3a5c85 LM |
1174 | /* Add condition CONDITION to GDBserver's breakpoint BP. */ |
1175 | ||
802e8e6d | 1176 | static void |
9aa76cd0 | 1177 | add_condition_to_breakpoint (struct gdb_breakpoint *bp, |
9f3a5c85 LM |
1178 | struct agent_expr *condition) |
1179 | { | |
1180 | struct point_cond_list *new_cond; | |
1181 | ||
1182 | /* Create new condition. */ | |
8d749320 | 1183 | new_cond = XCNEW (struct point_cond_list); |
9f3a5c85 LM |
1184 | new_cond->cond = condition; |
1185 | ||
1186 | /* Add condition to the list. */ | |
1187 | new_cond->next = bp->cond_list; | |
1188 | bp->cond_list = new_cond; | |
1189 | } | |
1190 | ||
802e8e6d | 1191 | /* Add a target-side condition CONDITION to a breakpoint. */ |
9f3a5c85 | 1192 | |
8b07ae33 | 1193 | int |
256642e8 | 1194 | add_breakpoint_condition (struct gdb_breakpoint *bp, const char **condition) |
9f3a5c85 | 1195 | { |
256642e8 | 1196 | const char *actparm = *condition; |
9f3a5c85 LM |
1197 | struct agent_expr *cond; |
1198 | ||
9f3a5c85 LM |
1199 | if (condition == NULL) |
1200 | return 1; | |
1201 | ||
d708bcd1 PA |
1202 | if (bp == NULL) |
1203 | return 0; | |
1204 | ||
9f3a5c85 LM |
1205 | cond = gdb_parse_agent_expr (&actparm); |
1206 | ||
1207 | if (cond == NULL) | |
1208 | { | |
9986ba08 | 1209 | warning ("Condition evaluation failed. Assuming unconditional."); |
9f3a5c85 LM |
1210 | return 0; |
1211 | } | |
1212 | ||
1213 | add_condition_to_breakpoint (bp, cond); | |
1214 | ||
1215 | *condition = actparm; | |
1216 | ||
d708bcd1 | 1217 | return 1; |
9f3a5c85 LM |
1218 | } |
1219 | ||
1220 | /* Evaluate condition (if any) at breakpoint BP. Return 1 if | |
1221 | true and 0 otherwise. */ | |
1222 | ||
802e8e6d PA |
1223 | static int |
1224 | gdb_condition_true_at_breakpoint_z_type (char z_type, CORE_ADDR addr) | |
8b07ae33 | 1225 | { |
9f3a5c85 | 1226 | /* Fetch registers for the current inferior. */ |
9aa76cd0 | 1227 | struct gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
9f3a5c85 LM |
1228 | ULONGEST value = 0; |
1229 | struct point_cond_list *cl; | |
1230 | int err = 0; | |
5ae4861a | 1231 | struct eval_agent_expr_context ctx; |
9f3a5c85 LM |
1232 | |
1233 | if (bp == NULL) | |
1234 | return 0; | |
8b07ae33 | 1235 | |
9f3a5c85 LM |
1236 | /* Check if the breakpoint is unconditional. If it is, |
1237 | the condition always evaluates to TRUE. */ | |
1238 | if (bp->cond_list == NULL) | |
1239 | return 1; | |
1240 | ||
0bfdf32f | 1241 | ctx.regcache = get_thread_regcache (current_thread, 1); |
5ae4861a YQ |
1242 | ctx.tframe = NULL; |
1243 | ctx.tpoint = NULL; | |
1244 | ||
9f3a5c85 LM |
1245 | /* Evaluate each condition in the breakpoint's list of conditions. |
1246 | Return true if any of the conditions evaluates to TRUE. | |
1247 | ||
1248 | If we failed to evaluate the expression, TRUE is returned. This | |
1249 | forces GDB to reevaluate the conditions. */ | |
1250 | for (cl = bp->cond_list; | |
1251 | cl && !value && !err; cl = cl->next) | |
1252 | { | |
1253 | /* Evaluate the condition. */ | |
5ae4861a | 1254 | err = gdb_eval_agent_expr (&ctx, cl->cond, &value); |
9f3a5c85 LM |
1255 | } |
1256 | ||
1257 | if (err) | |
1258 | return 1; | |
1259 | ||
1260 | return (value != 0); | |
1261 | } | |
1262 | ||
802e8e6d PA |
1263 | int |
1264 | gdb_condition_true_at_breakpoint (CORE_ADDR where) | |
1265 | { | |
1266 | /* Only check code (software or hardware) breakpoints. */ | |
1267 | return (gdb_condition_true_at_breakpoint_z_type (Z_PACKET_SW_BP, where) | |
1268 | || gdb_condition_true_at_breakpoint_z_type (Z_PACKET_HW_BP, where)); | |
1269 | } | |
1270 | ||
d3ce09f5 SS |
1271 | /* Add commands COMMANDS to GDBserver's breakpoint BP. */ |
1272 | ||
5b3da067 | 1273 | static void |
9aa76cd0 | 1274 | add_commands_to_breakpoint (struct gdb_breakpoint *bp, |
d3ce09f5 SS |
1275 | struct agent_expr *commands, int persist) |
1276 | { | |
1277 | struct point_command_list *new_cmd; | |
1278 | ||
1279 | /* Create new command. */ | |
8d749320 | 1280 | new_cmd = XCNEW (struct point_command_list); |
d3ce09f5 SS |
1281 | new_cmd->cmd = commands; |
1282 | new_cmd->persistence = persist; | |
1283 | ||
1284 | /* Add commands to the list. */ | |
1285 | new_cmd->next = bp->command_list; | |
1286 | bp->command_list = new_cmd; | |
1287 | } | |
1288 | ||
1289 | /* Add a target-side command COMMAND to the breakpoint at ADDR. */ | |
1290 | ||
1291 | int | |
256642e8 | 1292 | add_breakpoint_commands (struct gdb_breakpoint *bp, const char **command, |
802e8e6d | 1293 | int persist) |
d3ce09f5 | 1294 | { |
256642e8 | 1295 | const char *actparm = *command; |
d3ce09f5 SS |
1296 | struct agent_expr *cmd; |
1297 | ||
d3ce09f5 SS |
1298 | if (command == NULL) |
1299 | return 1; | |
1300 | ||
d708bcd1 PA |
1301 | if (bp == NULL) |
1302 | return 0; | |
1303 | ||
d3ce09f5 SS |
1304 | cmd = gdb_parse_agent_expr (&actparm); |
1305 | ||
1306 | if (cmd == NULL) | |
1307 | { | |
9986ba08 | 1308 | warning ("Command evaluation failed. Disabling."); |
d3ce09f5 SS |
1309 | return 0; |
1310 | } | |
1311 | ||
1312 | add_commands_to_breakpoint (bp, cmd, persist); | |
1313 | ||
1314 | *command = actparm; | |
1315 | ||
d708bcd1 | 1316 | return 1; |
d3ce09f5 SS |
1317 | } |
1318 | ||
1319 | /* Return true if there are no commands to run at this location, | |
1320 | which likely means we want to report back to GDB. */ | |
802e8e6d PA |
1321 | |
1322 | static int | |
1323 | gdb_no_commands_at_breakpoint_z_type (char z_type, CORE_ADDR addr) | |
d3ce09f5 | 1324 | { |
9aa76cd0 | 1325 | struct gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
d3ce09f5 SS |
1326 | |
1327 | if (bp == NULL) | |
802e8e6d | 1328 | return 1; |
d3ce09f5 | 1329 | |
c058728c SM |
1330 | threads_debug_printf ("at 0x%s, type Z%c, bp command_list is 0x%s", |
1331 | paddress (addr), z_type, | |
1332 | phex_nz ((uintptr_t) bp->command_list, 0)); | |
d3ce09f5 SS |
1333 | return (bp->command_list == NULL); |
1334 | } | |
1335 | ||
802e8e6d PA |
1336 | /* Return true if there are no commands to run at this location, |
1337 | which likely means we want to report back to GDB. */ | |
1338 | ||
1339 | int | |
1340 | gdb_no_commands_at_breakpoint (CORE_ADDR where) | |
1341 | { | |
1342 | /* Only check code (software or hardware) breakpoints. */ | |
1343 | return (gdb_no_commands_at_breakpoint_z_type (Z_PACKET_SW_BP, where) | |
1344 | && gdb_no_commands_at_breakpoint_z_type (Z_PACKET_HW_BP, where)); | |
1345 | } | |
1346 | ||
1347 | /* Run a breakpoint's commands. Returns 0 if there was a problem | |
1348 | running any command, 1 otherwise. */ | |
1349 | ||
1350 | static int | |
1351 | run_breakpoint_commands_z_type (char z_type, CORE_ADDR addr) | |
d3ce09f5 SS |
1352 | { |
1353 | /* Fetch registers for the current inferior. */ | |
9aa76cd0 | 1354 | struct gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
d3ce09f5 SS |
1355 | ULONGEST value = 0; |
1356 | struct point_command_list *cl; | |
1357 | int err = 0; | |
5ae4861a | 1358 | struct eval_agent_expr_context ctx; |
d3ce09f5 SS |
1359 | |
1360 | if (bp == NULL) | |
802e8e6d | 1361 | return 1; |
d3ce09f5 | 1362 | |
0bfdf32f | 1363 | ctx.regcache = get_thread_regcache (current_thread, 1); |
5ae4861a YQ |
1364 | ctx.tframe = NULL; |
1365 | ctx.tpoint = NULL; | |
1366 | ||
d3ce09f5 SS |
1367 | for (cl = bp->command_list; |
1368 | cl && !value && !err; cl = cl->next) | |
1369 | { | |
1370 | /* Run the command. */ | |
5ae4861a | 1371 | err = gdb_eval_agent_expr (&ctx, cl->cmd, &value); |
d3ce09f5 SS |
1372 | |
1373 | /* If one command has a problem, stop digging the hole deeper. */ | |
1374 | if (err) | |
802e8e6d | 1375 | return 0; |
d3ce09f5 | 1376 | } |
802e8e6d PA |
1377 | |
1378 | return 1; | |
d3ce09f5 SS |
1379 | } |
1380 | ||
802e8e6d PA |
1381 | void |
1382 | run_breakpoint_commands (CORE_ADDR where) | |
1383 | { | |
1384 | /* Only check code (software or hardware) breakpoints. If one | |
1385 | command has a problem, stop digging the hole deeper. */ | |
1386 | if (run_breakpoint_commands_z_type (Z_PACKET_SW_BP, where)) | |
1387 | run_breakpoint_commands_z_type (Z_PACKET_HW_BP, where); | |
1388 | } | |
1389 | ||
1390 | /* See mem-break.h. */ | |
9f3a5c85 LM |
1391 | |
1392 | int | |
1393 | gdb_breakpoint_here (CORE_ADDR where) | |
1394 | { | |
802e8e6d PA |
1395 | /* Only check code (software or hardware) breakpoints. */ |
1396 | return (find_gdb_breakpoint (Z_PACKET_SW_BP, where, -1) != NULL | |
1397 | || find_gdb_breakpoint (Z_PACKET_HW_BP, where, -1) != NULL); | |
68070c10 PA |
1398 | } |
1399 | ||
d50171e4 | 1400 | void |
3b9a79ef | 1401 | set_single_step_breakpoint (CORE_ADDR stop_at, ptid_t ptid) |
611cb4a5 | 1402 | { |
3b9a79ef | 1403 | struct single_step_breakpoint *bp; |
bec903c9 | 1404 | |
e99b03dc | 1405 | gdb_assert (current_ptid.pid () == ptid.pid ()); |
414a389f | 1406 | |
3b9a79ef YQ |
1407 | bp = (struct single_step_breakpoint *) set_breakpoint_type_at (single_step_breakpoint, |
1408 | stop_at, NULL); | |
bec903c9 | 1409 | bp->ptid = ptid; |
611cb4a5 DJ |
1410 | } |
1411 | ||
1412 | void | |
3b9a79ef | 1413 | delete_single_step_breakpoints (struct thread_info *thread) |
611cb4a5 | 1414 | { |
bec903c9 | 1415 | struct process_info *proc = get_thread_process (thread); |
d50171e4 | 1416 | struct breakpoint *bp, **bp_link; |
611cb4a5 | 1417 | |
d50171e4 PA |
1418 | bp = proc->breakpoints; |
1419 | bp_link = &proc->breakpoints; | |
611cb4a5 | 1420 | |
d50171e4 PA |
1421 | while (bp) |
1422 | { | |
3b9a79ef | 1423 | if (bp->type == single_step_breakpoint |
d7e15655 | 1424 | && ((struct single_step_breakpoint *) bp)->ptid == ptid_of (thread)) |
414a389f | 1425 | { |
24583e45 | 1426 | scoped_restore_current_thread restore_thread; |
bec903c9 | 1427 | |
24583e45 | 1428 | switch_to_thread (thread); |
414a389f | 1429 | *bp_link = bp->next; |
8b07ae33 | 1430 | release_breakpoint (proc, bp); |
414a389f PA |
1431 | bp = *bp_link; |
1432 | } | |
1433 | else | |
1434 | { | |
1435 | bp_link = &bp->next; | |
1436 | bp = *bp_link; | |
1437 | } | |
d50171e4 PA |
1438 | } |
1439 | } | |
b65d95c5 | 1440 | |
d50171e4 | 1441 | static void |
8b07ae33 | 1442 | uninsert_raw_breakpoint (struct raw_breakpoint *bp) |
d50171e4 | 1443 | { |
802e8e6d PA |
1444 | if (bp->inserted < 0) |
1445 | { | |
c058728c SM |
1446 | threads_debug_printf ("Breakpoint at %s is marked insert-disabled.", |
1447 | paddress (bp->pc)); | |
802e8e6d PA |
1448 | } |
1449 | else if (bp->inserted > 0) | |
d50171e4 PA |
1450 | { |
1451 | int err; | |
1452 | ||
1453 | bp->inserted = 0; | |
802e8e6d | 1454 | |
52405d85 | 1455 | err = the_target->remove_point (bp->raw_type, bp->pc, bp->kind, bp); |
d50171e4 PA |
1456 | if (err != 0) |
1457 | { | |
1458 | bp->inserted = 1; | |
611cb4a5 | 1459 | |
c058728c SM |
1460 | threads_debug_printf ("Failed to uninsert raw breakpoint at 0x%s.", |
1461 | paddress (bp->pc)); | |
d50171e4 PA |
1462 | } |
1463 | } | |
611cb4a5 DJ |
1464 | } |
1465 | ||
1466 | void | |
d50171e4 | 1467 | uninsert_breakpoints_at (CORE_ADDR pc) |
611cb4a5 | 1468 | { |
802e8e6d | 1469 | struct process_info *proc = current_process (); |
8b07ae33 | 1470 | struct raw_breakpoint *bp; |
802e8e6d | 1471 | int found = 0; |
611cb4a5 | 1472 | |
802e8e6d PA |
1473 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1474 | if ((bp->raw_type == raw_bkpt_type_sw | |
1475 | || bp->raw_type == raw_bkpt_type_hw) | |
1476 | && bp->pc == pc) | |
1477 | { | |
1478 | found = 1; | |
1479 | ||
1480 | if (bp->inserted) | |
1481 | uninsert_raw_breakpoint (bp); | |
1482 | } | |
1483 | ||
1484 | if (!found) | |
d50171e4 PA |
1485 | { |
1486 | /* This can happen when we remove all breakpoints while handling | |
1487 | a step-over. */ | |
c058728c SM |
1488 | threads_debug_printf ("Could not find breakpoint at 0x%s " |
1489 | "in list (uninserting).", | |
1490 | paddress (pc)); | |
d50171e4 | 1491 | } |
611cb4a5 DJ |
1492 | } |
1493 | ||
0fb4aa4b PA |
1494 | void |
1495 | uninsert_all_breakpoints (void) | |
1496 | { | |
1497 | struct process_info *proc = current_process (); | |
1498 | struct raw_breakpoint *bp; | |
1499 | ||
1500 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
802e8e6d PA |
1501 | if ((bp->raw_type == raw_bkpt_type_sw |
1502 | || bp->raw_type == raw_bkpt_type_hw) | |
1503 | && bp->inserted) | |
0fb4aa4b PA |
1504 | uninsert_raw_breakpoint (bp); |
1505 | } | |
1506 | ||
2e7b624b | 1507 | void |
3b9a79ef | 1508 | uninsert_single_step_breakpoints (struct thread_info *thread) |
2e7b624b | 1509 | { |
bec903c9 | 1510 | struct process_info *proc = get_thread_process (thread); |
2e7b624b YQ |
1511 | struct breakpoint *bp; |
1512 | ||
1513 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1514 | { | |
3b9a79ef | 1515 | if (bp->type == single_step_breakpoint |
d7e15655 | 1516 | && ((struct single_step_breakpoint *) bp)->ptid == ptid_of (thread)) |
2e7b624b YQ |
1517 | { |
1518 | gdb_assert (bp->raw->inserted > 0); | |
1519 | ||
1520 | /* Only uninsert the raw breakpoint if it only belongs to a | |
1521 | reinsert breakpoint. */ | |
1522 | if (bp->raw->refcount == 1) | |
bec903c9 | 1523 | { |
24583e45 | 1524 | scoped_restore_current_thread restore_thread; |
bec903c9 | 1525 | |
24583e45 | 1526 | switch_to_thread (thread); |
bec903c9 | 1527 | uninsert_raw_breakpoint (bp->raw); |
bec903c9 | 1528 | } |
2e7b624b YQ |
1529 | } |
1530 | } | |
1531 | } | |
1532 | ||
d50171e4 | 1533 | static void |
8b07ae33 | 1534 | reinsert_raw_breakpoint (struct raw_breakpoint *bp) |
611cb4a5 | 1535 | { |
d50171e4 | 1536 | int err; |
611cb4a5 | 1537 | |
d50171e4 | 1538 | if (bp->inserted) |
85ba7d86 | 1539 | return; |
611cb4a5 | 1540 | |
52405d85 | 1541 | err = the_target->insert_point (bp->raw_type, bp->pc, bp->kind, bp); |
d50171e4 PA |
1542 | if (err == 0) |
1543 | bp->inserted = 1; | |
c058728c SM |
1544 | else |
1545 | threads_debug_printf ("Failed to reinsert breakpoint at 0x%s (%d).", | |
1546 | paddress (bp->pc), err); | |
611cb4a5 DJ |
1547 | } |
1548 | ||
d50171e4 PA |
1549 | void |
1550 | reinsert_breakpoints_at (CORE_ADDR pc) | |
611cb4a5 | 1551 | { |
802e8e6d | 1552 | struct process_info *proc = current_process (); |
8b07ae33 | 1553 | struct raw_breakpoint *bp; |
802e8e6d | 1554 | int found = 0; |
611cb4a5 | 1555 | |
802e8e6d PA |
1556 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1557 | if ((bp->raw_type == raw_bkpt_type_sw | |
1558 | || bp->raw_type == raw_bkpt_type_hw) | |
1559 | && bp->pc == pc) | |
1560 | { | |
1561 | found = 1; | |
1562 | ||
1563 | reinsert_raw_breakpoint (bp); | |
1564 | } | |
1565 | ||
1566 | if (!found) | |
611cb4a5 | 1567 | { |
d50171e4 PA |
1568 | /* This can happen when we remove all breakpoints while handling |
1569 | a step-over. */ | |
c058728c SM |
1570 | threads_debug_printf ("Could not find raw breakpoint at 0x%s " |
1571 | "in list (reinserting).", | |
1572 | paddress (pc)); | |
611cb4a5 | 1573 | } |
d50171e4 PA |
1574 | } |
1575 | ||
f79b145d | 1576 | int |
3b9a79ef | 1577 | has_single_step_breakpoints (struct thread_info *thread) |
f79b145d | 1578 | { |
bec903c9 | 1579 | struct process_info *proc = get_thread_process (thread); |
f79b145d YQ |
1580 | struct breakpoint *bp, **bp_link; |
1581 | ||
1582 | bp = proc->breakpoints; | |
1583 | bp_link = &proc->breakpoints; | |
1584 | ||
1585 | while (bp) | |
1586 | { | |
3b9a79ef | 1587 | if (bp->type == single_step_breakpoint |
d7e15655 | 1588 | && ((struct single_step_breakpoint *) bp)->ptid == ptid_of (thread)) |
f79b145d YQ |
1589 | return 1; |
1590 | else | |
1591 | { | |
1592 | bp_link = &bp->next; | |
1593 | bp = *bp_link; | |
1594 | } | |
1595 | } | |
1596 | ||
1597 | return 0; | |
1598 | } | |
1599 | ||
0fb4aa4b PA |
1600 | void |
1601 | reinsert_all_breakpoints (void) | |
1602 | { | |
1603 | struct process_info *proc = current_process (); | |
1604 | struct raw_breakpoint *bp; | |
1605 | ||
1606 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
802e8e6d PA |
1607 | if ((bp->raw_type == raw_bkpt_type_sw |
1608 | || bp->raw_type == raw_bkpt_type_hw) | |
1609 | && !bp->inserted) | |
0fb4aa4b PA |
1610 | reinsert_raw_breakpoint (bp); |
1611 | } | |
1612 | ||
2e7b624b | 1613 | void |
3b9a79ef | 1614 | reinsert_single_step_breakpoints (struct thread_info *thread) |
2e7b624b | 1615 | { |
bec903c9 | 1616 | struct process_info *proc = get_thread_process (thread); |
2e7b624b YQ |
1617 | struct breakpoint *bp; |
1618 | ||
1619 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1620 | { | |
3b9a79ef | 1621 | if (bp->type == single_step_breakpoint |
d7e15655 | 1622 | && ((struct single_step_breakpoint *) bp)->ptid == ptid_of (thread)) |
2e7b624b YQ |
1623 | { |
1624 | gdb_assert (bp->raw->inserted > 0); | |
1625 | ||
1626 | if (bp->raw->refcount == 1) | |
bec903c9 | 1627 | { |
24583e45 | 1628 | scoped_restore_current_thread restore_thread; |
bec903c9 | 1629 | |
24583e45 | 1630 | switch_to_thread (thread); |
bec903c9 | 1631 | reinsert_raw_breakpoint (bp->raw); |
bec903c9 | 1632 | } |
2e7b624b YQ |
1633 | } |
1634 | } | |
1635 | } | |
1636 | ||
d50171e4 PA |
1637 | void |
1638 | check_breakpoints (CORE_ADDR stop_pc) | |
1639 | { | |
1640 | struct process_info *proc = current_process (); | |
1641 | struct breakpoint *bp, **bp_link; | |
1642 | ||
1643 | bp = proc->breakpoints; | |
1644 | bp_link = &proc->breakpoints; | |
1645 | ||
1646 | while (bp) | |
b65d95c5 | 1647 | { |
802e8e6d PA |
1648 | struct raw_breakpoint *raw = bp->raw; |
1649 | ||
1650 | if ((raw->raw_type == raw_bkpt_type_sw | |
1651 | || raw->raw_type == raw_bkpt_type_hw) | |
1652 | && raw->pc == stop_pc) | |
d50171e4 | 1653 | { |
802e8e6d | 1654 | if (!raw->inserted) |
d50171e4 PA |
1655 | { |
1656 | warning ("Hit a removed breakpoint?"); | |
1657 | return; | |
1658 | } | |
1659 | ||
9aa76cd0 | 1660 | if (bp->type == other_breakpoint) |
d50171e4 | 1661 | { |
9aa76cd0 YQ |
1662 | struct other_breakpoint *other_bp |
1663 | = (struct other_breakpoint *) bp; | |
1664 | ||
1665 | if (other_bp->handler != NULL && (*other_bp->handler) (stop_pc)) | |
1666 | { | |
1667 | *bp_link = bp->next; | |
d50171e4 | 1668 | |
9aa76cd0 | 1669 | release_breakpoint (proc, bp); |
d50171e4 | 1670 | |
9aa76cd0 YQ |
1671 | bp = *bp_link; |
1672 | continue; | |
1673 | } | |
d50171e4 PA |
1674 | } |
1675 | } | |
1676 | ||
1677 | bp_link = &bp->next; | |
1678 | bp = *bp_link; | |
b65d95c5 | 1679 | } |
611cb4a5 DJ |
1680 | } |
1681 | ||
d50171e4 PA |
1682 | int |
1683 | breakpoint_here (CORE_ADDR addr) | |
1684 | { | |
802e8e6d PA |
1685 | struct process_info *proc = current_process (); |
1686 | struct raw_breakpoint *bp; | |
1687 | ||
1688 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
1689 | if ((bp->raw_type == raw_bkpt_type_sw | |
1690 | || bp->raw_type == raw_bkpt_type_hw) | |
1691 | && bp->pc == addr) | |
1692 | return 1; | |
1693 | ||
1694 | return 0; | |
d50171e4 PA |
1695 | } |
1696 | ||
1697 | int | |
1698 | breakpoint_inserted_here (CORE_ADDR addr) | |
1699 | { | |
802e8e6d | 1700 | struct process_info *proc = current_process (); |
8b07ae33 | 1701 | struct raw_breakpoint *bp; |
d50171e4 | 1702 | |
802e8e6d PA |
1703 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1704 | if ((bp->raw_type == raw_bkpt_type_sw | |
1705 | || bp->raw_type == raw_bkpt_type_hw) | |
1706 | && bp->pc == addr | |
1707 | && bp->inserted) | |
1708 | return 1; | |
d50171e4 | 1709 | |
802e8e6d | 1710 | return 0; |
d50171e4 PA |
1711 | } |
1712 | ||
582511be PA |
1713 | /* See mem-break.h. */ |
1714 | ||
1715 | int | |
1716 | software_breakpoint_inserted_here (CORE_ADDR addr) | |
1717 | { | |
1718 | struct process_info *proc = current_process (); | |
1719 | struct raw_breakpoint *bp; | |
1720 | ||
1721 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
1722 | if (bp->raw_type == raw_bkpt_type_sw | |
1723 | && bp->pc == addr | |
1724 | && bp->inserted) | |
1725 | return 1; | |
1726 | ||
1727 | return 0; | |
1728 | } | |
1729 | ||
1730 | /* See mem-break.h. */ | |
1731 | ||
1732 | int | |
1733 | hardware_breakpoint_inserted_here (CORE_ADDR addr) | |
1734 | { | |
1735 | struct process_info *proc = current_process (); | |
1736 | struct raw_breakpoint *bp; | |
1737 | ||
1738 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
1739 | if (bp->raw_type == raw_bkpt_type_hw | |
1740 | && bp->pc == addr | |
1741 | && bp->inserted) | |
1742 | return 1; | |
1743 | ||
1744 | return 0; | |
1745 | } | |
1746 | ||
2d97cd35 AT |
1747 | /* See mem-break.h. */ |
1748 | ||
1749 | int | |
3b9a79ef | 1750 | single_step_breakpoint_inserted_here (CORE_ADDR addr) |
2d97cd35 AT |
1751 | { |
1752 | struct process_info *proc = current_process (); | |
1753 | struct breakpoint *bp; | |
1754 | ||
1755 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
3b9a79ef | 1756 | if (bp->type == single_step_breakpoint |
2d97cd35 AT |
1757 | && bp->raw->pc == addr |
1758 | && bp->raw->inserted) | |
1759 | return 1; | |
1760 | ||
1761 | return 0; | |
1762 | } | |
1763 | ||
d3bbe7a0 PA |
1764 | static int |
1765 | validate_inserted_breakpoint (struct raw_breakpoint *bp) | |
1766 | { | |
1767 | unsigned char *buf; | |
1768 | int err; | |
1769 | ||
1770 | gdb_assert (bp->inserted); | |
802e8e6d | 1771 | gdb_assert (bp->raw_type == raw_bkpt_type_sw); |
d3bbe7a0 | 1772 | |
27165294 | 1773 | buf = (unsigned char *) alloca (bp_size (bp)); |
52405d85 | 1774 | err = the_target->read_memory (bp->pc, buf, bp_size (bp)); |
27165294 | 1775 | if (err || memcmp (buf, bp_opcode (bp), bp_size (bp)) != 0) |
d3bbe7a0 PA |
1776 | { |
1777 | /* Tag it as gone. */ | |
802e8e6d | 1778 | bp->inserted = -1; |
d3bbe7a0 PA |
1779 | return 0; |
1780 | } | |
1781 | ||
1782 | return 1; | |
1783 | } | |
1784 | ||
1785 | static void | |
1786 | delete_disabled_breakpoints (void) | |
1787 | { | |
1788 | struct process_info *proc = current_process (); | |
1789 | struct breakpoint *bp, *next; | |
1790 | ||
1791 | for (bp = proc->breakpoints; bp != NULL; bp = next) | |
1792 | { | |
1793 | next = bp->next; | |
802e8e6d | 1794 | if (bp->raw->inserted < 0) |
8376a3cb | 1795 | { |
3b9a79ef | 1796 | /* If single_step_breakpoints become disabled, that means the |
8376a3cb | 1797 | manipulations (insertion and removal) of them are wrong. */ |
3b9a79ef | 1798 | gdb_assert (bp->type != single_step_breakpoint); |
8376a3cb YQ |
1799 | delete_breakpoint_1 (proc, bp); |
1800 | } | |
d3bbe7a0 PA |
1801 | } |
1802 | } | |
1803 | ||
1804 | /* Check if breakpoints we inserted still appear to be inserted. They | |
1805 | may disappear due to a shared library unload, and worse, a new | |
1806 | shared library may be reloaded at the same address as the | |
1807 | previously unloaded one. If that happens, we should make sure that | |
1808 | the shadow memory of the old breakpoints isn't used when reading or | |
1809 | writing memory. */ | |
1810 | ||
1811 | void | |
1812 | validate_breakpoints (void) | |
1813 | { | |
1814 | struct process_info *proc = current_process (); | |
1815 | struct breakpoint *bp; | |
1816 | ||
1817 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1818 | { | |
802e8e6d PA |
1819 | struct raw_breakpoint *raw = bp->raw; |
1820 | ||
1821 | if (raw->raw_type == raw_bkpt_type_sw && raw->inserted > 0) | |
1822 | validate_inserted_breakpoint (raw); | |
d3bbe7a0 PA |
1823 | } |
1824 | ||
1825 | delete_disabled_breakpoints (); | |
1826 | } | |
1827 | ||
611cb4a5 | 1828 | void |
f450004a | 1829 | check_mem_read (CORE_ADDR mem_addr, unsigned char *buf, int mem_len) |
611cb4a5 | 1830 | { |
95954743 | 1831 | struct process_info *proc = current_process (); |
8b07ae33 | 1832 | struct raw_breakpoint *bp = proc->raw_breakpoints; |
fa593d66 | 1833 | struct fast_tracepoint_jump *jp = proc->fast_tracepoint_jumps; |
611cb4a5 | 1834 | CORE_ADDR mem_end = mem_addr + mem_len; |
d3bbe7a0 | 1835 | int disabled_one = 0; |
611cb4a5 | 1836 | |
fa593d66 PA |
1837 | for (; jp != NULL; jp = jp->next) |
1838 | { | |
1839 | CORE_ADDR bp_end = jp->pc + jp->length; | |
1840 | CORE_ADDR start, end; | |
1841 | int copy_offset, copy_len, buf_offset; | |
1842 | ||
6bf36717 JK |
1843 | gdb_assert (fast_tracepoint_jump_shadow (jp) >= buf + mem_len |
1844 | || buf >= fast_tracepoint_jump_shadow (jp) + (jp)->length); | |
1845 | ||
fa593d66 PA |
1846 | if (mem_addr >= bp_end) |
1847 | continue; | |
1848 | if (jp->pc >= mem_end) | |
1849 | continue; | |
1850 | ||
1851 | start = jp->pc; | |
1852 | if (mem_addr > start) | |
1853 | start = mem_addr; | |
1854 | ||
1855 | end = bp_end; | |
1856 | if (end > mem_end) | |
1857 | end = mem_end; | |
1858 | ||
1859 | copy_len = end - start; | |
1860 | copy_offset = start - jp->pc; | |
1861 | buf_offset = start - mem_addr; | |
1862 | ||
1863 | if (jp->inserted) | |
1864 | memcpy (buf + buf_offset, | |
1865 | fast_tracepoint_jump_shadow (jp) + copy_offset, | |
1866 | copy_len); | |
1867 | } | |
1868 | ||
611cb4a5 DJ |
1869 | for (; bp != NULL; bp = bp->next) |
1870 | { | |
27165294 | 1871 | CORE_ADDR bp_end = bp->pc + bp_size (bp); |
611cb4a5 DJ |
1872 | CORE_ADDR start, end; |
1873 | int copy_offset, copy_len, buf_offset; | |
1874 | ||
802e8e6d PA |
1875 | if (bp->raw_type != raw_bkpt_type_sw) |
1876 | continue; | |
1877 | ||
6bf36717 JK |
1878 | gdb_assert (bp->old_data >= buf + mem_len |
1879 | || buf >= &bp->old_data[sizeof (bp->old_data)]); | |
1880 | ||
611cb4a5 DJ |
1881 | if (mem_addr >= bp_end) |
1882 | continue; | |
1883 | if (bp->pc >= mem_end) | |
1884 | continue; | |
1885 | ||
1886 | start = bp->pc; | |
1887 | if (mem_addr > start) | |
1888 | start = mem_addr; | |
1889 | ||
1890 | end = bp_end; | |
1891 | if (end > mem_end) | |
1892 | end = mem_end; | |
1893 | ||
1894 | copy_len = end - start; | |
1895 | copy_offset = start - bp->pc; | |
1896 | buf_offset = start - mem_addr; | |
1897 | ||
802e8e6d | 1898 | if (bp->inserted > 0) |
d3bbe7a0 PA |
1899 | { |
1900 | if (validate_inserted_breakpoint (bp)) | |
1901 | memcpy (buf + buf_offset, bp->old_data + copy_offset, copy_len); | |
1902 | else | |
1903 | disabled_one = 1; | |
1904 | } | |
611cb4a5 | 1905 | } |
d3bbe7a0 PA |
1906 | |
1907 | if (disabled_one) | |
1908 | delete_disabled_breakpoints (); | |
611cb4a5 DJ |
1909 | } |
1910 | ||
1911 | void | |
b9fd1791 PA |
1912 | check_mem_write (CORE_ADDR mem_addr, unsigned char *buf, |
1913 | const unsigned char *myaddr, int mem_len) | |
611cb4a5 | 1914 | { |
95954743 | 1915 | struct process_info *proc = current_process (); |
8b07ae33 | 1916 | struct raw_breakpoint *bp = proc->raw_breakpoints; |
fa593d66 | 1917 | struct fast_tracepoint_jump *jp = proc->fast_tracepoint_jumps; |
611cb4a5 | 1918 | CORE_ADDR mem_end = mem_addr + mem_len; |
d3bbe7a0 | 1919 | int disabled_one = 0; |
611cb4a5 | 1920 | |
fa593d66 PA |
1921 | /* First fast tracepoint jumps, then breakpoint traps on top. */ |
1922 | ||
1923 | for (; jp != NULL; jp = jp->next) | |
1924 | { | |
1925 | CORE_ADDR jp_end = jp->pc + jp->length; | |
1926 | CORE_ADDR start, end; | |
1927 | int copy_offset, copy_len, buf_offset; | |
1928 | ||
6bf36717 JK |
1929 | gdb_assert (fast_tracepoint_jump_shadow (jp) >= myaddr + mem_len |
1930 | || myaddr >= fast_tracepoint_jump_shadow (jp) + (jp)->length); | |
1931 | gdb_assert (fast_tracepoint_jump_insn (jp) >= buf + mem_len | |
1932 | || buf >= fast_tracepoint_jump_insn (jp) + (jp)->length); | |
1933 | ||
fa593d66 PA |
1934 | if (mem_addr >= jp_end) |
1935 | continue; | |
1936 | if (jp->pc >= mem_end) | |
1937 | continue; | |
1938 | ||
1939 | start = jp->pc; | |
1940 | if (mem_addr > start) | |
1941 | start = mem_addr; | |
1942 | ||
1943 | end = jp_end; | |
1944 | if (end > mem_end) | |
1945 | end = mem_end; | |
1946 | ||
1947 | copy_len = end - start; | |
1948 | copy_offset = start - jp->pc; | |
1949 | buf_offset = start - mem_addr; | |
1950 | ||
1951 | memcpy (fast_tracepoint_jump_shadow (jp) + copy_offset, | |
b9fd1791 | 1952 | myaddr + buf_offset, copy_len); |
fa593d66 PA |
1953 | if (jp->inserted) |
1954 | memcpy (buf + buf_offset, | |
1955 | fast_tracepoint_jump_insn (jp) + copy_offset, copy_len); | |
1956 | } | |
1957 | ||
611cb4a5 DJ |
1958 | for (; bp != NULL; bp = bp->next) |
1959 | { | |
27165294 | 1960 | CORE_ADDR bp_end = bp->pc + bp_size (bp); |
611cb4a5 DJ |
1961 | CORE_ADDR start, end; |
1962 | int copy_offset, copy_len, buf_offset; | |
1963 | ||
802e8e6d PA |
1964 | if (bp->raw_type != raw_bkpt_type_sw) |
1965 | continue; | |
1966 | ||
6bf36717 JK |
1967 | gdb_assert (bp->old_data >= myaddr + mem_len |
1968 | || myaddr >= &bp->old_data[sizeof (bp->old_data)]); | |
1969 | ||
611cb4a5 DJ |
1970 | if (mem_addr >= bp_end) |
1971 | continue; | |
1972 | if (bp->pc >= mem_end) | |
1973 | continue; | |
1974 | ||
1975 | start = bp->pc; | |
1976 | if (mem_addr > start) | |
1977 | start = mem_addr; | |
1978 | ||
1979 | end = bp_end; | |
1980 | if (end > mem_end) | |
1981 | end = mem_end; | |
1982 | ||
1983 | copy_len = end - start; | |
1984 | copy_offset = start - bp->pc; | |
1985 | buf_offset = start - mem_addr; | |
1986 | ||
b9fd1791 | 1987 | memcpy (bp->old_data + copy_offset, myaddr + buf_offset, copy_len); |
802e8e6d | 1988 | if (bp->inserted > 0) |
d3bbe7a0 PA |
1989 | { |
1990 | if (validate_inserted_breakpoint (bp)) | |
27165294 | 1991 | memcpy (buf + buf_offset, bp_opcode (bp) + copy_offset, copy_len); |
d3bbe7a0 PA |
1992 | else |
1993 | disabled_one = 1; | |
1994 | } | |
611cb4a5 | 1995 | } |
d3bbe7a0 PA |
1996 | |
1997 | if (disabled_one) | |
1998 | delete_disabled_breakpoints (); | |
611cb4a5 | 1999 | } |
ae13219e | 2000 | |
4a4fd10d TY |
2001 | /* Delete all breakpoints, watchpoints, tracepoints, and catchpoints, |
2002 | and un-insert them from the inferior. */ | |
ae13219e DJ |
2003 | |
2004 | void | |
2005 | delete_all_breakpoints (void) | |
2006 | { | |
95954743 PA |
2007 | struct process_info *proc = current_process (); |
2008 | ||
2009 | while (proc->breakpoints) | |
8b07ae33 | 2010 | delete_breakpoint_1 (proc, proc->breakpoints); |
95954743 PA |
2011 | } |
2012 | ||
f9e39928 | 2013 | /* Clear the "inserted" flag in all breakpoints. */ |
95954743 PA |
2014 | |
2015 | void | |
f9e39928 | 2016 | mark_breakpoints_out (struct process_info *proc) |
95954743 | 2017 | { |
8b07ae33 | 2018 | struct raw_breakpoint *raw_bp; |
95954743 | 2019 | |
8b07ae33 PA |
2020 | for (raw_bp = proc->raw_breakpoints; raw_bp != NULL; raw_bp = raw_bp->next) |
2021 | raw_bp->inserted = 0; | |
f9e39928 PA |
2022 | } |
2023 | ||
4a4fd10d TY |
2024 | /* Release all breakpoints, watchpoints, tracepoints, and catchpoints, |
2025 | but do not try to un-insert them from the inferior. */ | |
f9e39928 PA |
2026 | |
2027 | void | |
2028 | free_all_breakpoints (struct process_info *proc) | |
2029 | { | |
2030 | mark_breakpoints_out (proc); | |
8b07ae33 PA |
2031 | |
2032 | /* Note: use PROC explicitly instead of deferring to | |
2033 | delete_all_breakpoints --- CURRENT_INFERIOR may already have been | |
2034 | released when we get here. There should be no call to | |
2035 | current_process from here on. */ | |
95954743 | 2036 | while (proc->breakpoints) |
8b07ae33 | 2037 | delete_breakpoint_1 (proc, proc->breakpoints); |
ae13219e | 2038 | } |
ddcbc397 DB |
2039 | |
2040 | /* Clone an agent expression. */ | |
2041 | ||
2042 | static struct agent_expr * | |
2043 | clone_agent_expr (const struct agent_expr *src_ax) | |
2044 | { | |
2045 | struct agent_expr *ax; | |
2046 | ||
8d749320 | 2047 | ax = XCNEW (struct agent_expr); |
ddcbc397 | 2048 | ax->length = src_ax->length; |
224c3ddb | 2049 | ax->bytes = (unsigned char *) xcalloc (ax->length, 1); |
ddcbc397 DB |
2050 | memcpy (ax->bytes, src_ax->bytes, ax->length); |
2051 | return ax; | |
2052 | } | |
2053 | ||
2054 | /* Deep-copy the contents of one breakpoint to another. */ | |
2055 | ||
2056 | static struct breakpoint * | |
bec903c9 | 2057 | clone_one_breakpoint (const struct breakpoint *src, ptid_t ptid) |
ddcbc397 DB |
2058 | { |
2059 | struct breakpoint *dest; | |
2060 | struct raw_breakpoint *dest_raw; | |
ddcbc397 DB |
2061 | |
2062 | /* Clone the raw breakpoint. */ | |
8d749320 | 2063 | dest_raw = XCNEW (struct raw_breakpoint); |
ddcbc397 DB |
2064 | dest_raw->raw_type = src->raw->raw_type; |
2065 | dest_raw->refcount = src->raw->refcount; | |
2066 | dest_raw->pc = src->raw->pc; | |
27165294 | 2067 | dest_raw->kind = src->raw->kind; |
ddcbc397 DB |
2068 | memcpy (dest_raw->old_data, src->raw->old_data, MAX_BREAKPOINT_LEN); |
2069 | dest_raw->inserted = src->raw->inserted; | |
2070 | ||
2071 | /* Clone the high-level breakpoint. */ | |
9aa76cd0 | 2072 | if (is_gdb_breakpoint (src->type)) |
ddcbc397 | 2073 | { |
9aa76cd0 YQ |
2074 | struct gdb_breakpoint *gdb_dest = XCNEW (struct gdb_breakpoint); |
2075 | struct point_cond_list *current_cond; | |
2076 | struct point_cond_list *new_cond; | |
2077 | struct point_cond_list *cond_tail = NULL; | |
2078 | struct point_command_list *current_cmd; | |
2079 | struct point_command_list *new_cmd; | |
2080 | struct point_command_list *cmd_tail = NULL; | |
2081 | ||
2082 | /* Clone the condition list. */ | |
2083 | for (current_cond = ((struct gdb_breakpoint *) src)->cond_list; | |
2084 | current_cond != NULL; | |
2085 | current_cond = current_cond->next) | |
2086 | { | |
2087 | new_cond = XCNEW (struct point_cond_list); | |
2088 | new_cond->cond = clone_agent_expr (current_cond->cond); | |
2089 | APPEND_TO_LIST (&gdb_dest->cond_list, new_cond, cond_tail); | |
2090 | } | |
2091 | ||
2092 | /* Clone the command list. */ | |
2093 | for (current_cmd = ((struct gdb_breakpoint *) src)->command_list; | |
2094 | current_cmd != NULL; | |
2095 | current_cmd = current_cmd->next) | |
2096 | { | |
2097 | new_cmd = XCNEW (struct point_command_list); | |
2098 | new_cmd->cmd = clone_agent_expr (current_cmd->cmd); | |
2099 | new_cmd->persistence = current_cmd->persistence; | |
2100 | APPEND_TO_LIST (&gdb_dest->command_list, new_cmd, cmd_tail); | |
2101 | } | |
2102 | ||
2103 | dest = (struct breakpoint *) gdb_dest; | |
ddcbc397 | 2104 | } |
9aa76cd0 YQ |
2105 | else if (src->type == other_breakpoint) |
2106 | { | |
2107 | struct other_breakpoint *other_dest = XCNEW (struct other_breakpoint); | |
ddcbc397 | 2108 | |
9aa76cd0 YQ |
2109 | other_dest->handler = ((struct other_breakpoint *) src)->handler; |
2110 | dest = (struct breakpoint *) other_dest; | |
2111 | } | |
3b9a79ef | 2112 | else if (src->type == single_step_breakpoint) |
ddcbc397 | 2113 | { |
3b9a79ef YQ |
2114 | struct single_step_breakpoint *ss_dest |
2115 | = XCNEW (struct single_step_breakpoint); | |
9aa76cd0 | 2116 | |
3b9a79ef YQ |
2117 | dest = (struct breakpoint *) ss_dest; |
2118 | /* Since single-step breakpoint is thread specific, don't copy | |
bec903c9 | 2119 | thread id from SRC, use ID instead. */ |
3b9a79ef | 2120 | ss_dest->ptid = ptid; |
ddcbc397 | 2121 | } |
9aa76cd0 YQ |
2122 | else |
2123 | gdb_assert_not_reached ("unhandled breakpoint type"); | |
2124 | ||
2125 | dest->type = src->type; | |
2126 | dest->raw = dest_raw; | |
ddcbc397 DB |
2127 | |
2128 | return dest; | |
2129 | } | |
2130 | ||
63c40ec7 | 2131 | /* See mem-break.h. */ |
ddcbc397 DB |
2132 | |
2133 | void | |
63c40ec7 YQ |
2134 | clone_all_breakpoints (struct thread_info *child_thread, |
2135 | const struct thread_info *parent_thread) | |
ddcbc397 DB |
2136 | { |
2137 | const struct breakpoint *bp; | |
2138 | struct breakpoint *new_bkpt; | |
2139 | struct breakpoint *bkpt_tail = NULL; | |
2140 | struct raw_breakpoint *raw_bkpt_tail = NULL; | |
63c40ec7 YQ |
2141 | struct process_info *child_proc = get_thread_process (child_thread); |
2142 | struct process_info *parent_proc = get_thread_process (parent_thread); | |
2143 | struct breakpoint **new_list = &child_proc->breakpoints; | |
2144 | struct raw_breakpoint **new_raw_list = &child_proc->raw_breakpoints; | |
ddcbc397 | 2145 | |
63c40ec7 | 2146 | for (bp = parent_proc->breakpoints; bp != NULL; bp = bp->next) |
ddcbc397 | 2147 | { |
bec903c9 | 2148 | new_bkpt = clone_one_breakpoint (bp, ptid_of (child_thread)); |
ddcbc397 DB |
2149 | APPEND_TO_LIST (new_list, new_bkpt, bkpt_tail); |
2150 | APPEND_TO_LIST (new_raw_list, new_bkpt->raw, raw_bkpt_tail); | |
2151 | } | |
2152 | } |