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