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611cb4a5 | 1 | /* Memory breakpoint operations for the remote server for GDB. |
4a94e368 | 2 | Copyright (C) 2002-2022 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 | |
73 | temporarilly uninsert a breakpoint without the client knowing about | |
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: | |
38e08fca GB |
256 | internal_error (__FILE__, __LINE__, |
257 | "bad raw breakpoint type %d", (int) raw_type); | |
802e8e6d PA |
258 | } |
259 | } | |
260 | ||
261 | /* See mem-break.h. */ | |
262 | ||
263 | static enum bkpt_type | |
264 | Z_packet_to_bkpt_type (char z_type) | |
265 | { | |
266 | gdb_assert ('0' <= z_type && z_type <= '4'); | |
267 | ||
d2412fa5 | 268 | return (enum bkpt_type) (gdb_breakpoint_Z0 + (z_type - '0')); |
802e8e6d PA |
269 | } |
270 | ||
271 | /* See mem-break.h. */ | |
272 | ||
273 | enum raw_bkpt_type | |
274 | Z_packet_to_raw_bkpt_type (char z_type) | |
275 | { | |
276 | switch (z_type) | |
277 | { | |
278 | case Z_PACKET_SW_BP: | |
279 | return raw_bkpt_type_sw; | |
280 | case Z_PACKET_HW_BP: | |
281 | return raw_bkpt_type_hw; | |
282 | case Z_PACKET_WRITE_WP: | |
283 | return raw_bkpt_type_write_wp; | |
284 | case Z_PACKET_READ_WP: | |
285 | return raw_bkpt_type_read_wp; | |
286 | case Z_PACKET_ACCESS_WP: | |
287 | return raw_bkpt_type_access_wp; | |
288 | default: | |
289 | gdb_assert_not_reached ("unhandled Z packet type."); | |
932539e3 PA |
290 | } |
291 | } | |
292 | ||
9aa76cd0 YQ |
293 | /* Return true if breakpoint TYPE is a GDB breakpoint. */ |
294 | ||
295 | static int | |
296 | is_gdb_breakpoint (enum bkpt_type type) | |
297 | { | |
298 | return (type == gdb_breakpoint_Z0 | |
299 | || type == gdb_breakpoint_Z1 | |
300 | || type == gdb_breakpoint_Z2 | |
301 | || type == gdb_breakpoint_Z3 | |
302 | || type == gdb_breakpoint_Z4); | |
303 | } | |
304 | ||
31445d10 PA |
305 | bool |
306 | any_persistent_commands (process_info *proc) | |
d3ce09f5 | 307 | { |
d3ce09f5 SS |
308 | struct breakpoint *bp; |
309 | struct point_command_list *cl; | |
310 | ||
311 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
312 | { | |
9aa76cd0 YQ |
313 | if (is_gdb_breakpoint (bp->type)) |
314 | { | |
315 | struct gdb_breakpoint *gdb_bp = (struct gdb_breakpoint *) bp; | |
316 | ||
317 | for (cl = gdb_bp->command_list; cl != NULL; cl = cl->next) | |
318 | if (cl->persistence) | |
31445d10 | 319 | return true; |
9aa76cd0 | 320 | } |
d3ce09f5 SS |
321 | } |
322 | ||
31445d10 | 323 | return false; |
d3ce09f5 SS |
324 | } |
325 | ||
802e8e6d PA |
326 | /* Find low-level breakpoint of type TYPE at address ADDR that is not |
327 | insert-disabled. Returns NULL if not found. */ | |
328 | ||
8b07ae33 | 329 | static struct raw_breakpoint * |
802e8e6d | 330 | find_enabled_raw_code_breakpoint_at (CORE_ADDR addr, enum raw_bkpt_type type) |
8b07ae33 PA |
331 | { |
332 | struct process_info *proc = current_process (); | |
333 | struct raw_breakpoint *bp; | |
414a389f | 334 | |
8b07ae33 | 335 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
802e8e6d PA |
336 | if (bp->pc == addr |
337 | && bp->raw_type == type | |
338 | && bp->inserted >= 0) | |
8b07ae33 PA |
339 | return bp; |
340 | ||
341 | return NULL; | |
342 | } | |
343 | ||
802e8e6d PA |
344 | /* Find low-level breakpoint of type TYPE at address ADDR. Returns |
345 | NULL if not found. */ | |
346 | ||
8b07ae33 | 347 | static struct raw_breakpoint * |
27165294 | 348 | find_raw_breakpoint_at (CORE_ADDR addr, enum raw_bkpt_type type, int kind) |
611cb4a5 | 349 | { |
95954743 | 350 | struct process_info *proc = current_process (); |
8b07ae33 | 351 | struct raw_breakpoint *bp; |
802e8e6d PA |
352 | |
353 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
27165294 | 354 | if (bp->pc == addr && bp->raw_type == type && bp->kind == kind) |
802e8e6d PA |
355 | return bp; |
356 | ||
357 | return NULL; | |
358 | } | |
359 | ||
360 | /* See mem-break.h. */ | |
361 | ||
362 | int | |
363 | insert_memory_breakpoint (struct raw_breakpoint *bp) | |
364 | { | |
6bf36717 | 365 | unsigned char buf[MAX_BREAKPOINT_LEN]; |
802e8e6d | 366 | int err; |
611cb4a5 | 367 | |
fa593d66 PA |
368 | /* Note that there can be fast tracepoint jumps installed in the |
369 | same memory range, so to get at the original memory, we need to | |
370 | use read_inferior_memory, which masks those out. */ | |
27165294 | 371 | err = read_inferior_memory (bp->pc, buf, bp_size (bp)); |
d50171e4 PA |
372 | if (err != 0) |
373 | { | |
c058728c SM |
374 | threads_debug_printf ("Failed to read shadow memory of" |
375 | " breakpoint at 0x%s (%s).", | |
376 | paddress (bp->pc), safe_strerror (err)); | |
d50171e4 | 377 | } |
802e8e6d PA |
378 | else |
379 | { | |
27165294 | 380 | memcpy (bp->old_data, buf, bp_size (bp)); |
611cb4a5 | 381 | |
52405d85 TBA |
382 | err = the_target->write_memory (bp->pc, bp_opcode (bp), |
383 | bp_size (bp)); | |
802e8e6d | 384 | if (err != 0) |
c058728c SM |
385 | threads_debug_printf ("Failed to insert breakpoint at 0x%s (%s).", |
386 | paddress (bp->pc), safe_strerror (err)); | |
802e8e6d PA |
387 | } |
388 | return err != 0 ? -1 : 0; | |
389 | } | |
390 | ||
391 | /* See mem-break.h */ | |
392 | ||
393 | int | |
394 | remove_memory_breakpoint (struct raw_breakpoint *bp) | |
395 | { | |
396 | unsigned char buf[MAX_BREAKPOINT_LEN]; | |
397 | int err; | |
398 | ||
399 | /* Since there can be trap breakpoints inserted in the same address | |
4196ab2a | 400 | range, we use `target_write_memory', which takes care of |
802e8e6d PA |
401 | layering breakpoints on top of fast tracepoints, and on top of |
402 | the buffer we pass it. This works because the caller has already | |
403 | either unlinked the breakpoint or marked it uninserted. Also | |
404 | note that we need to pass the current shadow contents, because | |
4196ab2a | 405 | target_write_memory updates any shadow memory with what we pass |
802e8e6d | 406 | here, and we want that to be a nop. */ |
27165294 | 407 | memcpy (buf, bp->old_data, bp_size (bp)); |
4196ab2a | 408 | err = target_write_memory (bp->pc, buf, bp_size (bp)); |
d50171e4 | 409 | if (err != 0) |
c058728c SM |
410 | threads_debug_printf ("Failed to uninsert raw breakpoint " |
411 | "at 0x%s (%s) while deleting it.", | |
412 | paddress (bp->pc), safe_strerror (err)); | |
413 | ||
802e8e6d PA |
414 | return err != 0 ? -1 : 0; |
415 | } | |
416 | ||
27165294 | 417 | /* Set a RAW breakpoint of type TYPE and kind KIND at WHERE. On |
802e8e6d PA |
418 | success, a pointer to the new breakpoint is returned. On failure, |
419 | returns NULL and writes the error code to *ERR. */ | |
420 | ||
421 | static struct raw_breakpoint * | |
27165294 | 422 | set_raw_breakpoint_at (enum raw_bkpt_type type, CORE_ADDR where, int kind, |
802e8e6d PA |
423 | int *err) |
424 | { | |
425 | struct process_info *proc = current_process (); | |
426 | struct raw_breakpoint *bp; | |
427 | ||
428 | if (type == raw_bkpt_type_sw || type == raw_bkpt_type_hw) | |
429 | { | |
430 | bp = find_enabled_raw_code_breakpoint_at (where, type); | |
27165294 | 431 | if (bp != NULL && bp->kind != kind) |
802e8e6d | 432 | { |
27165294 | 433 | /* A different kind than previously seen. The previous |
802e8e6d | 434 | breakpoint must be gone then. */ |
c058728c SM |
435 | threads_debug_printf |
436 | ("Inconsistent breakpoint kind? Was %d, now %d.", | |
437 | bp->kind, kind); | |
802e8e6d PA |
438 | bp->inserted = -1; |
439 | bp = NULL; | |
440 | } | |
441 | } | |
442 | else | |
27165294 | 443 | bp = find_raw_breakpoint_at (where, type, kind); |
802e8e6d | 444 | |
45dd3607 | 445 | gdb::unique_xmalloc_ptr<struct raw_breakpoint> bp_holder; |
20249ae4 | 446 | if (bp == NULL) |
802e8e6d | 447 | { |
45dd3607 TT |
448 | bp_holder.reset (XCNEW (struct raw_breakpoint)); |
449 | bp = bp_holder.get (); | |
20249ae4 YQ |
450 | bp->pc = where; |
451 | bp->kind = kind; | |
452 | bp->raw_type = type; | |
802e8e6d PA |
453 | } |
454 | ||
20249ae4 | 455 | if (!bp->inserted) |
802e8e6d | 456 | { |
52405d85 | 457 | *err = the_target->insert_point (bp->raw_type, bp->pc, bp->kind, bp); |
20249ae4 YQ |
458 | if (*err != 0) |
459 | { | |
c058728c SM |
460 | threads_debug_printf ("Failed to insert breakpoint at 0x%s (%d).", |
461 | paddress (where), *err); | |
20249ae4 | 462 | |
20249ae4 YQ |
463 | return NULL; |
464 | } | |
465 | ||
466 | bp->inserted = 1; | |
d50171e4 PA |
467 | } |
468 | ||
45dd3607 TT |
469 | /* If the breakpoint was allocated above, we know we want to keep it |
470 | now. */ | |
471 | bp_holder.release (); | |
20249ae4 YQ |
472 | |
473 | /* Link the breakpoint in, if this is the first reference. */ | |
474 | if (++bp->refcount == 1) | |
475 | { | |
476 | bp->next = proc->raw_breakpoints; | |
477 | proc->raw_breakpoints = bp; | |
478 | } | |
d50171e4 PA |
479 | return bp; |
480 | } | |
481 | ||
fa593d66 PA |
482 | /* Notice that breakpoint traps are always installed on top of fast |
483 | tracepoint jumps. This is even if the fast tracepoint is installed | |
484 | at a later time compared to when the breakpoint was installed. | |
485 | This means that a stopping breakpoint or tracepoint has higher | |
486 | "priority". In turn, this allows having fast and slow tracepoints | |
487 | (and breakpoints) at the same address behave correctly. */ | |
488 | ||
489 | ||
490 | /* A fast tracepoint jump. */ | |
491 | ||
492 | struct fast_tracepoint_jump | |
493 | { | |
494 | struct fast_tracepoint_jump *next; | |
495 | ||
496 | /* A reference count. GDB can install more than one fast tracepoint | |
497 | at the same address (each with its own action list, for | |
498 | example). */ | |
499 | int refcount; | |
500 | ||
501 | /* The fast tracepoint's insertion address. There can only be one | |
502 | of these for a given PC. */ | |
503 | CORE_ADDR pc; | |
504 | ||
505 | /* Non-zero if this fast tracepoint jump is currently inserted in | |
506 | the inferior. */ | |
507 | int inserted; | |
508 | ||
509 | /* The length of the jump instruction. */ | |
510 | int length; | |
511 | ||
512 | /* A poor-man's flexible array member, holding both the jump | |
513 | instruction to insert, and a copy of the instruction that would | |
514 | be in memory had not been a jump there (the shadow memory of the | |
515 | tracepoint jump). */ | |
516 | unsigned char insn_and_shadow[0]; | |
517 | }; | |
518 | ||
519 | /* Fast tracepoint FP's jump instruction to insert. */ | |
520 | #define fast_tracepoint_jump_insn(fp) \ | |
521 | ((fp)->insn_and_shadow + 0) | |
522 | ||
523 | /* The shadow memory of fast tracepoint jump FP. */ | |
524 | #define fast_tracepoint_jump_shadow(fp) \ | |
525 | ((fp)->insn_and_shadow + (fp)->length) | |
526 | ||
527 | ||
528 | /* Return the fast tracepoint jump set at WHERE. */ | |
529 | ||
530 | static struct fast_tracepoint_jump * | |
531 | find_fast_tracepoint_jump_at (CORE_ADDR where) | |
532 | { | |
533 | struct process_info *proc = current_process (); | |
534 | struct fast_tracepoint_jump *jp; | |
535 | ||
536 | for (jp = proc->fast_tracepoint_jumps; jp != NULL; jp = jp->next) | |
537 | if (jp->pc == where) | |
538 | return jp; | |
539 | ||
540 | return NULL; | |
541 | } | |
542 | ||
543 | int | |
544 | fast_tracepoint_jump_here (CORE_ADDR where) | |
545 | { | |
546 | struct fast_tracepoint_jump *jp = find_fast_tracepoint_jump_at (where); | |
547 | ||
548 | return (jp != NULL); | |
549 | } | |
550 | ||
551 | int | |
552 | delete_fast_tracepoint_jump (struct fast_tracepoint_jump *todel) | |
553 | { | |
554 | struct fast_tracepoint_jump *bp, **bp_link; | |
555 | int ret; | |
556 | struct process_info *proc = current_process (); | |
557 | ||
558 | bp = proc->fast_tracepoint_jumps; | |
559 | bp_link = &proc->fast_tracepoint_jumps; | |
560 | ||
561 | while (bp) | |
562 | { | |
563 | if (bp == todel) | |
564 | { | |
565 | if (--bp->refcount == 0) | |
566 | { | |
567 | struct fast_tracepoint_jump *prev_bp_link = *bp_link; | |
6bf36717 | 568 | unsigned char *buf; |
fa593d66 PA |
569 | |
570 | /* Unlink it. */ | |
571 | *bp_link = bp->next; | |
572 | ||
573 | /* Since there can be breakpoints inserted in the same | |
4196ab2a | 574 | address range, we use `target_write_memory', which |
fa593d66 PA |
575 | takes care of layering breakpoints on top of fast |
576 | tracepoints, and on top of the buffer we pass it. | |
577 | This works because we've already unlinked the fast | |
578 | tracepoint jump above. Also note that we need to | |
579 | pass the current shadow contents, because | |
4196ab2a | 580 | target_write_memory updates any shadow memory with |
fa593d66 | 581 | what we pass here, and we want that to be a nop. */ |
224c3ddb | 582 | buf = (unsigned char *) alloca (bp->length); |
6bf36717 | 583 | memcpy (buf, fast_tracepoint_jump_shadow (bp), bp->length); |
4196ab2a | 584 | ret = target_write_memory (bp->pc, buf, bp->length); |
fa593d66 PA |
585 | if (ret != 0) |
586 | { | |
587 | /* Something went wrong, relink the jump. */ | |
588 | *bp_link = prev_bp_link; | |
589 | ||
c058728c SM |
590 | threads_debug_printf |
591 | ("Failed to uninsert fast tracepoint jump " | |
592 | "at 0x%s (%s) while deleting it.", | |
593 | paddress (bp->pc), safe_strerror (ret)); | |
fa593d66 PA |
594 | return ret; |
595 | } | |
596 | ||
597 | free (bp); | |
598 | } | |
599 | ||
600 | return 0; | |
601 | } | |
602 | else | |
603 | { | |
604 | bp_link = &bp->next; | |
605 | bp = *bp_link; | |
606 | } | |
607 | } | |
608 | ||
609 | warning ("Could not find fast tracepoint jump in list."); | |
610 | return ENOENT; | |
611 | } | |
612 | ||
5c73ff4e YQ |
613 | void |
614 | inc_ref_fast_tracepoint_jump (struct fast_tracepoint_jump *jp) | |
615 | { | |
616 | jp->refcount++; | |
617 | } | |
618 | ||
fa593d66 PA |
619 | struct fast_tracepoint_jump * |
620 | set_fast_tracepoint_jump (CORE_ADDR where, | |
621 | unsigned char *insn, ULONGEST length) | |
622 | { | |
623 | struct process_info *proc = current_process (); | |
624 | struct fast_tracepoint_jump *jp; | |
625 | int err; | |
6bf36717 | 626 | unsigned char *buf; |
fa593d66 PA |
627 | |
628 | /* We refcount fast tracepoint jumps. Check if we already know | |
629 | about a jump at this address. */ | |
630 | jp = find_fast_tracepoint_jump_at (where); | |
631 | if (jp != NULL) | |
632 | { | |
633 | jp->refcount++; | |
634 | return jp; | |
635 | } | |
636 | ||
637 | /* We don't, so create a new object. Double the length, because the | |
638 | flexible array member holds both the jump insn, and the | |
639 | shadow. */ | |
224c3ddb | 640 | jp = (struct fast_tracepoint_jump *) xcalloc (1, sizeof (*jp) + (length * 2)); |
fa593d66 PA |
641 | jp->pc = where; |
642 | jp->length = length; | |
643 | memcpy (fast_tracepoint_jump_insn (jp), insn, length); | |
644 | jp->refcount = 1; | |
224c3ddb | 645 | buf = (unsigned char *) alloca (length); |
fa593d66 PA |
646 | |
647 | /* Note that there can be trap breakpoints inserted in the same | |
648 | address range. To access the original memory contents, we use | |
649 | `read_inferior_memory', which masks out breakpoints. */ | |
6bf36717 | 650 | err = read_inferior_memory (where, buf, length); |
fa593d66 PA |
651 | if (err != 0) |
652 | { | |
c058728c SM |
653 | threads_debug_printf ("Failed to read shadow memory of" |
654 | " fast tracepoint at 0x%s (%s).", | |
655 | paddress (where), safe_strerror (err)); | |
fa593d66 PA |
656 | free (jp); |
657 | return NULL; | |
658 | } | |
6bf36717 | 659 | memcpy (fast_tracepoint_jump_shadow (jp), buf, length); |
fa593d66 PA |
660 | |
661 | /* Link the jump in. */ | |
662 | jp->inserted = 1; | |
663 | jp->next = proc->fast_tracepoint_jumps; | |
664 | proc->fast_tracepoint_jumps = jp; | |
665 | ||
666 | /* Since there can be trap breakpoints inserted in the same address | |
4196ab2a | 667 | range, we use use `target_write_memory', which takes care of |
fa593d66 PA |
668 | layering breakpoints on top of fast tracepoints, on top of the |
669 | buffer we pass it. This works because we've already linked in | |
670 | the fast tracepoint jump above. Also note that we need to pass | |
4196ab2a | 671 | the current shadow contents, because target_write_memory |
fa593d66 PA |
672 | updates any shadow memory with what we pass here, and we want |
673 | that to be a nop. */ | |
4196ab2a | 674 | err = target_write_memory (where, buf, length); |
fa593d66 PA |
675 | if (err != 0) |
676 | { | |
c058728c SM |
677 | threads_debug_printf |
678 | ("Failed to insert fast tracepoint jump at 0x%s (%s).", | |
679 | paddress (where), safe_strerror (err)); | |
fa593d66 PA |
680 | |
681 | /* Unlink it. */ | |
682 | proc->fast_tracepoint_jumps = jp->next; | |
683 | free (jp); | |
684 | ||
685 | return NULL; | |
686 | } | |
687 | ||
688 | return jp; | |
689 | } | |
690 | ||
691 | void | |
692 | uninsert_fast_tracepoint_jumps_at (CORE_ADDR pc) | |
693 | { | |
694 | struct fast_tracepoint_jump *jp; | |
695 | int err; | |
696 | ||
697 | jp = find_fast_tracepoint_jump_at (pc); | |
698 | if (jp == NULL) | |
699 | { | |
700 | /* This can happen when we remove all breakpoints while handling | |
701 | a step-over. */ | |
c058728c SM |
702 | threads_debug_printf ("Could not find fast tracepoint jump at 0x%s " |
703 | "in list (uninserting).", | |
704 | paddress (pc)); | |
fa593d66 PA |
705 | return; |
706 | } | |
707 | ||
708 | if (jp->inserted) | |
709 | { | |
6bf36717 JK |
710 | unsigned char *buf; |
711 | ||
fa593d66 PA |
712 | jp->inserted = 0; |
713 | ||
714 | /* Since there can be trap breakpoints inserted in the same | |
4196ab2a | 715 | address range, we use use `target_write_memory', which |
fa593d66 PA |
716 | takes care of layering breakpoints on top of fast |
717 | tracepoints, and on top of the buffer we pass it. This works | |
718 | because we've already marked the fast tracepoint fast | |
719 | tracepoint jump uninserted above. Also note that we need to | |
720 | pass the current shadow contents, because | |
4196ab2a | 721 | target_write_memory updates any shadow memory with what we |
fa593d66 | 722 | pass here, and we want that to be a nop. */ |
224c3ddb | 723 | buf = (unsigned char *) alloca (jp->length); |
6bf36717 | 724 | memcpy (buf, fast_tracepoint_jump_shadow (jp), jp->length); |
4196ab2a | 725 | err = target_write_memory (jp->pc, buf, jp->length); |
fa593d66 PA |
726 | if (err != 0) |
727 | { | |
728 | jp->inserted = 1; | |
729 | ||
c058728c SM |
730 | threads_debug_printf ("Failed to uninsert fast tracepoint jump at" |
731 | " 0x%s (%s).", | |
732 | paddress (pc), safe_strerror (err)); | |
fa593d66 PA |
733 | } |
734 | } | |
735 | } | |
736 | ||
737 | void | |
738 | reinsert_fast_tracepoint_jumps_at (CORE_ADDR where) | |
739 | { | |
740 | struct fast_tracepoint_jump *jp; | |
741 | int err; | |
6bf36717 | 742 | unsigned char *buf; |
fa593d66 PA |
743 | |
744 | jp = find_fast_tracepoint_jump_at (where); | |
745 | if (jp == NULL) | |
746 | { | |
747 | /* This can happen when we remove breakpoints when a tracepoint | |
748 | hit causes a tracing stop, while handling a step-over. */ | |
c058728c SM |
749 | threads_debug_printf ("Could not find fast tracepoint jump at 0x%s " |
750 | "in list (reinserting).", | |
751 | paddress (where)); | |
fa593d66 PA |
752 | return; |
753 | } | |
754 | ||
755 | if (jp->inserted) | |
756 | error ("Jump already inserted at reinsert time."); | |
757 | ||
758 | jp->inserted = 1; | |
759 | ||
760 | /* Since there can be trap breakpoints inserted in the same address | |
4196ab2a | 761 | range, we use `target_write_memory', which takes care of |
fa593d66 PA |
762 | layering breakpoints on top of fast tracepoints, and on top of |
763 | the buffer we pass it. This works because we've already marked | |
764 | the fast tracepoint jump inserted above. Also note that we need | |
765 | to pass the current shadow contents, because | |
4196ab2a | 766 | target_write_memory updates any shadow memory with what we pass |
fa593d66 | 767 | here, and we want that to be a nop. */ |
224c3ddb | 768 | buf = (unsigned char *) alloca (jp->length); |
6bf36717 | 769 | memcpy (buf, fast_tracepoint_jump_shadow (jp), jp->length); |
4196ab2a | 770 | err = target_write_memory (where, buf, jp->length); |
fa593d66 PA |
771 | if (err != 0) |
772 | { | |
773 | jp->inserted = 0; | |
774 | ||
c058728c SM |
775 | threads_debug_printf ("Failed to reinsert fast tracepoint jump at" |
776 | " 0x%s (%s).", | |
777 | paddress (where), safe_strerror (err)); | |
fa593d66 PA |
778 | } |
779 | } | |
780 | ||
802e8e6d | 781 | /* Set a high-level breakpoint of type TYPE, with low level type |
27165294 | 782 | RAW_TYPE and kind KIND, at WHERE. On success, a pointer to the new |
802e8e6d PA |
783 | breakpoint is returned. On failure, returns NULL and writes the |
784 | error code to *ERR. HANDLER is called when the breakpoint is hit. | |
785 | HANDLER should return 1 if the breakpoint should be deleted, 0 | |
786 | otherwise. */ | |
787 | ||
788 | static struct breakpoint * | |
789 | set_breakpoint (enum bkpt_type type, enum raw_bkpt_type raw_type, | |
27165294 | 790 | CORE_ADDR where, int kind, |
802e8e6d | 791 | int (*handler) (CORE_ADDR), int *err) |
d50171e4 PA |
792 | { |
793 | struct process_info *proc = current_process (); | |
794 | struct breakpoint *bp; | |
8b07ae33 | 795 | struct raw_breakpoint *raw; |
d50171e4 | 796 | |
27165294 | 797 | raw = set_raw_breakpoint_at (raw_type, where, kind, err); |
d50171e4 | 798 | |
8b07ae33 | 799 | if (raw == NULL) |
d50171e4 PA |
800 | { |
801 | /* warn? */ | |
414a389f | 802 | return NULL; |
d50171e4 PA |
803 | } |
804 | ||
9aa76cd0 YQ |
805 | if (is_gdb_breakpoint (type)) |
806 | { | |
807 | struct gdb_breakpoint *gdb_bp = XCNEW (struct gdb_breakpoint); | |
808 | ||
809 | bp = (struct breakpoint *) gdb_bp; | |
810 | gdb_assert (handler == NULL); | |
811 | } | |
812 | else if (type == other_breakpoint) | |
813 | { | |
814 | struct other_breakpoint *other_bp = XCNEW (struct other_breakpoint); | |
815 | ||
816 | other_bp->handler = handler; | |
817 | bp = (struct breakpoint *) other_bp; | |
818 | } | |
3b9a79ef | 819 | else if (type == single_step_breakpoint) |
9aa76cd0 | 820 | { |
3b9a79ef YQ |
821 | struct single_step_breakpoint *ss_bp |
822 | = XCNEW (struct single_step_breakpoint); | |
8b07ae33 | 823 | |
3b9a79ef | 824 | bp = (struct breakpoint *) ss_bp; |
9aa76cd0 YQ |
825 | } |
826 | else | |
827 | gdb_assert_not_reached ("unhandled breakpoint type"); | |
828 | ||
829 | bp->type = type; | |
8b07ae33 | 830 | bp->raw = raw; |
611cb4a5 | 831 | |
95954743 PA |
832 | bp->next = proc->breakpoints; |
833 | proc->breakpoints = bp; | |
414a389f PA |
834 | |
835 | return bp; | |
611cb4a5 DJ |
836 | } |
837 | ||
811f8301 | 838 | /* Set breakpoint of TYPE on address WHERE with handler HANDLER. */ |
802e8e6d | 839 | |
811f8301 YQ |
840 | static struct breakpoint * |
841 | set_breakpoint_type_at (enum bkpt_type type, CORE_ADDR where, | |
842 | int (*handler) (CORE_ADDR)) | |
802e8e6d PA |
843 | { |
844 | int err_ignored; | |
27165294 | 845 | CORE_ADDR placed_address = where; |
2e6ee069 | 846 | int breakpoint_kind = target_breakpoint_kind_from_pc (&placed_address); |
802e8e6d | 847 | |
811f8301 | 848 | return set_breakpoint (type, raw_bkpt_type_sw, |
27165294 | 849 | placed_address, breakpoint_kind, handler, |
802e8e6d PA |
850 | &err_ignored); |
851 | } | |
852 | ||
811f8301 YQ |
853 | /* See mem-break.h */ |
854 | ||
855 | struct breakpoint * | |
856 | set_breakpoint_at (CORE_ADDR where, int (*handler) (CORE_ADDR)) | |
857 | { | |
858 | return set_breakpoint_type_at (other_breakpoint, where, handler); | |
859 | } | |
860 | ||
802e8e6d | 861 | |
8b07ae33 PA |
862 | static int |
863 | delete_raw_breakpoint (struct process_info *proc, struct raw_breakpoint *todel) | |
864 | { | |
865 | struct raw_breakpoint *bp, **bp_link; | |
866 | int ret; | |
867 | ||
868 | bp = proc->raw_breakpoints; | |
869 | bp_link = &proc->raw_breakpoints; | |
870 | ||
871 | while (bp) | |
872 | { | |
873 | if (bp == todel) | |
874 | { | |
802e8e6d | 875 | if (bp->inserted > 0) |
8b07ae33 PA |
876 | { |
877 | struct raw_breakpoint *prev_bp_link = *bp_link; | |
878 | ||
879 | *bp_link = bp->next; | |
880 | ||
52405d85 TBA |
881 | ret = the_target->remove_point (bp->raw_type, bp->pc, |
882 | bp->kind, bp); | |
8b07ae33 PA |
883 | if (ret != 0) |
884 | { | |
885 | /* Something went wrong, relink the breakpoint. */ | |
886 | *bp_link = prev_bp_link; | |
887 | ||
c058728c SM |
888 | threads_debug_printf ("Failed to uninsert raw breakpoint " |
889 | "at 0x%s while deleting it.", | |
890 | paddress (bp->pc)); | |
8b07ae33 PA |
891 | return ret; |
892 | } | |
8b07ae33 PA |
893 | } |
894 | else | |
895 | *bp_link = bp->next; | |
896 | ||
897 | free (bp); | |
898 | return 0; | |
899 | } | |
900 | else | |
901 | { | |
902 | bp_link = &bp->next; | |
903 | bp = *bp_link; | |
904 | } | |
905 | } | |
906 | ||
907 | warning ("Could not find raw breakpoint in list."); | |
908 | return ENOENT; | |
909 | } | |
910 | ||
911 | static int | |
912 | release_breakpoint (struct process_info *proc, struct breakpoint *bp) | |
913 | { | |
914 | int newrefcount; | |
915 | int ret; | |
916 | ||
917 | newrefcount = bp->raw->refcount - 1; | |
918 | if (newrefcount == 0) | |
919 | { | |
920 | ret = delete_raw_breakpoint (proc, bp->raw); | |
921 | if (ret != 0) | |
922 | return ret; | |
923 | } | |
924 | else | |
925 | bp->raw->refcount = newrefcount; | |
926 | ||
927 | free (bp); | |
928 | ||
929 | return 0; | |
930 | } | |
931 | ||
932 | static int | |
933 | delete_breakpoint_1 (struct process_info *proc, struct breakpoint *todel) | |
611cb4a5 | 934 | { |
414a389f | 935 | struct breakpoint *bp, **bp_link; |
8b07ae33 | 936 | int err; |
611cb4a5 | 937 | |
414a389f PA |
938 | bp = proc->breakpoints; |
939 | bp_link = &proc->breakpoints; | |
940 | ||
941 | while (bp) | |
611cb4a5 | 942 | { |
414a389f | 943 | if (bp == todel) |
611cb4a5 | 944 | { |
414a389f PA |
945 | *bp_link = bp->next; |
946 | ||
8b07ae33 PA |
947 | err = release_breakpoint (proc, bp); |
948 | if (err != 0) | |
949 | return err; | |
950 | ||
951 | bp = *bp_link; | |
952 | return 0; | |
611cb4a5 | 953 | } |
414a389f PA |
954 | else |
955 | { | |
956 | bp_link = &bp->next; | |
957 | bp = *bp_link; | |
958 | } | |
611cb4a5 | 959 | } |
414a389f | 960 | |
611cb4a5 | 961 | warning ("Could not find breakpoint in list."); |
8b07ae33 PA |
962 | return ENOENT; |
963 | } | |
964 | ||
219f2f23 | 965 | int |
8b07ae33 PA |
966 | delete_breakpoint (struct breakpoint *todel) |
967 | { | |
968 | struct process_info *proc = current_process (); | |
969 | return delete_breakpoint_1 (proc, todel); | |
611cb4a5 DJ |
970 | } |
971 | ||
27165294 AT |
972 | /* Locate a GDB breakpoint of type Z_TYPE and kind KIND placed at |
973 | address ADDR and return a pointer to its structure. If KIND is -1, | |
974 | the breakpoint's kind is ignored. */ | |
51aa91f9 | 975 | |
9aa76cd0 | 976 | static struct gdb_breakpoint * |
27165294 | 977 | find_gdb_breakpoint (char z_type, CORE_ADDR addr, int kind) |
611cb4a5 | 978 | { |
95954743 | 979 | struct process_info *proc = current_process (); |
8b07ae33 | 980 | struct breakpoint *bp; |
802e8e6d | 981 | enum bkpt_type type = Z_packet_to_bkpt_type (z_type); |
611cb4a5 | 982 | |
8b07ae33 | 983 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) |
802e8e6d | 984 | if (bp->type == type && bp->raw->pc == addr |
27165294 | 985 | && (kind == -1 || bp->raw->kind == kind)) |
2583da7c | 986 | return (struct gdb_breakpoint *) bp; |
611cb4a5 DJ |
987 | |
988 | return NULL; | |
989 | } | |
990 | ||
802e8e6d PA |
991 | static int |
992 | z_type_supported (char z_type) | |
993 | { | |
994 | return (z_type >= '0' && z_type <= '4' | |
52405d85 | 995 | && the_target->supports_z_point_type (z_type)); |
802e8e6d PA |
996 | } |
997 | ||
27165294 | 998 | /* Create a new GDB breakpoint of type Z_TYPE at ADDR with kind KIND. |
802e8e6d PA |
999 | Returns a pointer to the newly created breakpoint on success. On |
1000 | failure returns NULL and sets *ERR to either -1 for error, or 1 if | |
1001 | Z_TYPE breakpoints are not supported on this target. */ | |
1002 | ||
8e347faf PA |
1003 | struct gdb_breakpoint * |
1004 | set_gdb_breakpoint (char z_type, CORE_ADDR addr, int kind, int *err) | |
68070c10 | 1005 | { |
9aa76cd0 | 1006 | struct gdb_breakpoint *bp; |
802e8e6d PA |
1007 | enum bkpt_type type; |
1008 | enum raw_bkpt_type raw_type; | |
1009 | ||
8e347faf PA |
1010 | if (!z_type_supported (z_type)) |
1011 | { | |
1012 | *err = 1; | |
1013 | return nullptr; | |
1014 | } | |
1015 | ||
802e8e6d PA |
1016 | /* If we see GDB inserting a second code breakpoint at the same |
1017 | address, then either: GDB is updating the breakpoint's conditions | |
1018 | or commands; or, the first breakpoint must have disappeared due | |
1019 | to a shared library unload. On targets where the shared | |
1020 | libraries are handled by userspace, like SVR4, for example, | |
1021 | GDBserver can't tell if a library was loaded or unloaded. Since | |
1022 | we refcount raw breakpoints, we must be careful to make sure GDB | |
1023 | breakpoints never contribute more than one reference. if we | |
1024 | didn't do this, in case the previous breakpoint is gone due to a | |
1025 | shared library unload, we'd just increase the refcount of the | |
1026 | previous breakpoint at this address, but the trap was not planted | |
1027 | in the inferior anymore, thus the breakpoint would never be hit. | |
1028 | Note this must be careful to not create a window where | |
1029 | breakpoints are removed from the target, for non-stop, in case | |
1030 | the target can poke at memory while the program is running. */ | |
1031 | if (z_type == Z_PACKET_SW_BP | |
1032 | || z_type == Z_PACKET_HW_BP) | |
1033 | { | |
1034 | bp = find_gdb_breakpoint (z_type, addr, -1); | |
8b07ae33 | 1035 | |
802e8e6d PA |
1036 | if (bp != NULL) |
1037 | { | |
9aa76cd0 | 1038 | if (bp->base.raw->kind != kind) |
802e8e6d | 1039 | { |
27165294 | 1040 | /* A different kind than previously seen. The previous |
802e8e6d | 1041 | breakpoint must be gone then. */ |
9aa76cd0 YQ |
1042 | bp->base.raw->inserted = -1; |
1043 | delete_breakpoint ((struct breakpoint *) bp); | |
802e8e6d PA |
1044 | bp = NULL; |
1045 | } | |
1046 | else if (z_type == Z_PACKET_SW_BP) | |
1047 | { | |
1048 | /* Check if the breakpoint is actually gone from the | |
1049 | target, due to an solib unload, for example. Might | |
1050 | as well validate _all_ breakpoints. */ | |
1051 | validate_breakpoints (); | |
1052 | ||
1053 | /* Breakpoints that don't pass validation are | |
1054 | deleted. */ | |
1055 | bp = find_gdb_breakpoint (z_type, addr, -1); | |
1056 | } | |
1057 | } | |
1058 | } | |
1059 | else | |
1060 | { | |
27165294 | 1061 | /* Data breakpoints for the same address but different kind are |
802e8e6d PA |
1062 | expected. GDB doesn't merge these. The backend gets to do |
1063 | that if it wants/can. */ | |
27165294 | 1064 | bp = find_gdb_breakpoint (z_type, addr, kind); |
802e8e6d | 1065 | } |
8b07ae33 | 1066 | |
d3bbe7a0 PA |
1067 | if (bp != NULL) |
1068 | { | |
802e8e6d PA |
1069 | /* We already know about this breakpoint, there's nothing else |
1070 | to do - GDB's reference is already accounted for. Note that | |
1071 | whether the breakpoint inserted is left as is - we may be | |
1072 | stepping over it, for example, in which case we don't want to | |
1073 | force-reinsert it. */ | |
1074 | return bp; | |
1075 | } | |
1076 | ||
1077 | raw_type = Z_packet_to_raw_bkpt_type (z_type); | |
1078 | type = Z_packet_to_bkpt_type (z_type); | |
9aa76cd0 YQ |
1079 | return (struct gdb_breakpoint *) set_breakpoint (type, raw_type, addr, |
1080 | kind, NULL, err); | |
802e8e6d PA |
1081 | } |
1082 | ||
27165294 | 1083 | /* Delete a GDB breakpoint of type Z_TYPE and kind KIND previously |
802e8e6d PA |
1084 | inserted at ADDR with set_gdb_breakpoint_at. Returns 0 on success, |
1085 | -1 on error, and 1 if Z_TYPE breakpoints are not supported on this | |
1086 | target. */ | |
1087 | ||
8e347faf PA |
1088 | int |
1089 | delete_gdb_breakpoint (char z_type, CORE_ADDR addr, int kind) | |
8b07ae33 | 1090 | { |
8e347faf PA |
1091 | if (!z_type_supported (z_type)) |
1092 | return 1; | |
8b07ae33 | 1093 | |
8e347faf | 1094 | gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, kind); |
8b07ae33 PA |
1095 | if (bp == NULL) |
1096 | return -1; | |
1097 | ||
0a261ed8 PA |
1098 | /* Before deleting the breakpoint, make sure to free its condition |
1099 | and command lists. */ | |
1100 | clear_breakpoint_conditions_and_commands (bp); | |
8e347faf | 1101 | int err = delete_breakpoint ((struct breakpoint *) bp); |
802e8e6d | 1102 | if (err != 0) |
8b07ae33 PA |
1103 | return -1; |
1104 | ||
1105 | return 0; | |
1106 | } | |
1107 | ||
802e8e6d | 1108 | /* Clear all conditions associated with a breakpoint. */ |
9f3a5c85 | 1109 | |
0a261ed8 | 1110 | static void |
9aa76cd0 | 1111 | clear_breakpoint_conditions (struct gdb_breakpoint *bp) |
9f3a5c85 | 1112 | { |
412c89dd | 1113 | struct point_cond_list *cond; |
9f3a5c85 | 1114 | |
802e8e6d | 1115 | if (bp->cond_list == NULL) |
9f3a5c85 LM |
1116 | return; |
1117 | ||
1118 | cond = bp->cond_list; | |
9f3a5c85 LM |
1119 | |
1120 | while (cond != NULL) | |
1121 | { | |
412c89dd LM |
1122 | struct point_cond_list *cond_next; |
1123 | ||
1124 | cond_next = cond->next; | |
0a261ed8 | 1125 | gdb_free_agent_expr (cond->cond); |
9f3a5c85 | 1126 | free (cond); |
412c89dd | 1127 | cond = cond_next; |
9f3a5c85 LM |
1128 | } |
1129 | ||
1130 | bp->cond_list = NULL; | |
1131 | } | |
1132 | ||
0a261ed8 PA |
1133 | /* Clear all commands associated with a breakpoint. */ |
1134 | ||
1135 | static void | |
9aa76cd0 | 1136 | clear_breakpoint_commands (struct gdb_breakpoint *bp) |
0a261ed8 PA |
1137 | { |
1138 | struct point_command_list *cmd; | |
1139 | ||
1140 | if (bp->command_list == NULL) | |
1141 | return; | |
1142 | ||
1143 | cmd = bp->command_list; | |
1144 | ||
1145 | while (cmd != NULL) | |
1146 | { | |
1147 | struct point_command_list *cmd_next; | |
1148 | ||
1149 | cmd_next = cmd->next; | |
1150 | gdb_free_agent_expr (cmd->cmd); | |
1151 | free (cmd); | |
1152 | cmd = cmd_next; | |
1153 | } | |
1154 | ||
1155 | bp->command_list = NULL; | |
1156 | } | |
1157 | ||
1158 | void | |
9aa76cd0 | 1159 | clear_breakpoint_conditions_and_commands (struct gdb_breakpoint *bp) |
0a261ed8 PA |
1160 | { |
1161 | clear_breakpoint_conditions (bp); | |
1162 | clear_breakpoint_commands (bp); | |
1163 | } | |
1164 | ||
9f3a5c85 LM |
1165 | /* Add condition CONDITION to GDBserver's breakpoint BP. */ |
1166 | ||
802e8e6d | 1167 | static void |
9aa76cd0 | 1168 | add_condition_to_breakpoint (struct gdb_breakpoint *bp, |
9f3a5c85 LM |
1169 | struct agent_expr *condition) |
1170 | { | |
1171 | struct point_cond_list *new_cond; | |
1172 | ||
1173 | /* Create new condition. */ | |
8d749320 | 1174 | new_cond = XCNEW (struct point_cond_list); |
9f3a5c85 LM |
1175 | new_cond->cond = condition; |
1176 | ||
1177 | /* Add condition to the list. */ | |
1178 | new_cond->next = bp->cond_list; | |
1179 | bp->cond_list = new_cond; | |
1180 | } | |
1181 | ||
802e8e6d | 1182 | /* Add a target-side condition CONDITION to a breakpoint. */ |
9f3a5c85 | 1183 | |
8b07ae33 | 1184 | int |
256642e8 | 1185 | add_breakpoint_condition (struct gdb_breakpoint *bp, const char **condition) |
9f3a5c85 | 1186 | { |
256642e8 | 1187 | const char *actparm = *condition; |
9f3a5c85 LM |
1188 | struct agent_expr *cond; |
1189 | ||
9f3a5c85 LM |
1190 | if (condition == NULL) |
1191 | return 1; | |
1192 | ||
d708bcd1 PA |
1193 | if (bp == NULL) |
1194 | return 0; | |
1195 | ||
9f3a5c85 LM |
1196 | cond = gdb_parse_agent_expr (&actparm); |
1197 | ||
1198 | if (cond == NULL) | |
1199 | { | |
9986ba08 | 1200 | warning ("Condition evaluation failed. Assuming unconditional."); |
9f3a5c85 LM |
1201 | return 0; |
1202 | } | |
1203 | ||
1204 | add_condition_to_breakpoint (bp, cond); | |
1205 | ||
1206 | *condition = actparm; | |
1207 | ||
d708bcd1 | 1208 | return 1; |
9f3a5c85 LM |
1209 | } |
1210 | ||
1211 | /* Evaluate condition (if any) at breakpoint BP. Return 1 if | |
1212 | true and 0 otherwise. */ | |
1213 | ||
802e8e6d PA |
1214 | static int |
1215 | gdb_condition_true_at_breakpoint_z_type (char z_type, CORE_ADDR addr) | |
8b07ae33 | 1216 | { |
9f3a5c85 | 1217 | /* Fetch registers for the current inferior. */ |
9aa76cd0 | 1218 | struct gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
9f3a5c85 LM |
1219 | ULONGEST value = 0; |
1220 | struct point_cond_list *cl; | |
1221 | int err = 0; | |
5ae4861a | 1222 | struct eval_agent_expr_context ctx; |
9f3a5c85 LM |
1223 | |
1224 | if (bp == NULL) | |
1225 | return 0; | |
8b07ae33 | 1226 | |
9f3a5c85 LM |
1227 | /* Check if the breakpoint is unconditional. If it is, |
1228 | the condition always evaluates to TRUE. */ | |
1229 | if (bp->cond_list == NULL) | |
1230 | return 1; | |
1231 | ||
0bfdf32f | 1232 | ctx.regcache = get_thread_regcache (current_thread, 1); |
5ae4861a YQ |
1233 | ctx.tframe = NULL; |
1234 | ctx.tpoint = NULL; | |
1235 | ||
9f3a5c85 LM |
1236 | /* Evaluate each condition in the breakpoint's list of conditions. |
1237 | Return true if any of the conditions evaluates to TRUE. | |
1238 | ||
1239 | If we failed to evaluate the expression, TRUE is returned. This | |
1240 | forces GDB to reevaluate the conditions. */ | |
1241 | for (cl = bp->cond_list; | |
1242 | cl && !value && !err; cl = cl->next) | |
1243 | { | |
1244 | /* Evaluate the condition. */ | |
5ae4861a | 1245 | err = gdb_eval_agent_expr (&ctx, cl->cond, &value); |
9f3a5c85 LM |
1246 | } |
1247 | ||
1248 | if (err) | |
1249 | return 1; | |
1250 | ||
1251 | return (value != 0); | |
1252 | } | |
1253 | ||
802e8e6d PA |
1254 | int |
1255 | gdb_condition_true_at_breakpoint (CORE_ADDR where) | |
1256 | { | |
1257 | /* Only check code (software or hardware) breakpoints. */ | |
1258 | return (gdb_condition_true_at_breakpoint_z_type (Z_PACKET_SW_BP, where) | |
1259 | || gdb_condition_true_at_breakpoint_z_type (Z_PACKET_HW_BP, where)); | |
1260 | } | |
1261 | ||
d3ce09f5 SS |
1262 | /* Add commands COMMANDS to GDBserver's breakpoint BP. */ |
1263 | ||
5b3da067 | 1264 | static void |
9aa76cd0 | 1265 | add_commands_to_breakpoint (struct gdb_breakpoint *bp, |
d3ce09f5 SS |
1266 | struct agent_expr *commands, int persist) |
1267 | { | |
1268 | struct point_command_list *new_cmd; | |
1269 | ||
1270 | /* Create new command. */ | |
8d749320 | 1271 | new_cmd = XCNEW (struct point_command_list); |
d3ce09f5 SS |
1272 | new_cmd->cmd = commands; |
1273 | new_cmd->persistence = persist; | |
1274 | ||
1275 | /* Add commands to the list. */ | |
1276 | new_cmd->next = bp->command_list; | |
1277 | bp->command_list = new_cmd; | |
1278 | } | |
1279 | ||
1280 | /* Add a target-side command COMMAND to the breakpoint at ADDR. */ | |
1281 | ||
1282 | int | |
256642e8 | 1283 | add_breakpoint_commands (struct gdb_breakpoint *bp, const char **command, |
802e8e6d | 1284 | int persist) |
d3ce09f5 | 1285 | { |
256642e8 | 1286 | const char *actparm = *command; |
d3ce09f5 SS |
1287 | struct agent_expr *cmd; |
1288 | ||
d3ce09f5 SS |
1289 | if (command == NULL) |
1290 | return 1; | |
1291 | ||
d708bcd1 PA |
1292 | if (bp == NULL) |
1293 | return 0; | |
1294 | ||
d3ce09f5 SS |
1295 | cmd = gdb_parse_agent_expr (&actparm); |
1296 | ||
1297 | if (cmd == NULL) | |
1298 | { | |
9986ba08 | 1299 | warning ("Command evaluation failed. Disabling."); |
d3ce09f5 SS |
1300 | return 0; |
1301 | } | |
1302 | ||
1303 | add_commands_to_breakpoint (bp, cmd, persist); | |
1304 | ||
1305 | *command = actparm; | |
1306 | ||
d708bcd1 | 1307 | return 1; |
d3ce09f5 SS |
1308 | } |
1309 | ||
1310 | /* Return true if there are no commands to run at this location, | |
1311 | which likely means we want to report back to GDB. */ | |
802e8e6d PA |
1312 | |
1313 | static int | |
1314 | gdb_no_commands_at_breakpoint_z_type (char z_type, CORE_ADDR addr) | |
d3ce09f5 | 1315 | { |
9aa76cd0 | 1316 | struct gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
d3ce09f5 SS |
1317 | |
1318 | if (bp == NULL) | |
802e8e6d | 1319 | return 1; |
d3ce09f5 | 1320 | |
c058728c SM |
1321 | threads_debug_printf ("at 0x%s, type Z%c, bp command_list is 0x%s", |
1322 | paddress (addr), z_type, | |
1323 | phex_nz ((uintptr_t) bp->command_list, 0)); | |
d3ce09f5 SS |
1324 | return (bp->command_list == NULL); |
1325 | } | |
1326 | ||
802e8e6d PA |
1327 | /* Return true if there are no commands to run at this location, |
1328 | which likely means we want to report back to GDB. */ | |
1329 | ||
1330 | int | |
1331 | gdb_no_commands_at_breakpoint (CORE_ADDR where) | |
1332 | { | |
1333 | /* Only check code (software or hardware) breakpoints. */ | |
1334 | return (gdb_no_commands_at_breakpoint_z_type (Z_PACKET_SW_BP, where) | |
1335 | && gdb_no_commands_at_breakpoint_z_type (Z_PACKET_HW_BP, where)); | |
1336 | } | |
1337 | ||
1338 | /* Run a breakpoint's commands. Returns 0 if there was a problem | |
1339 | running any command, 1 otherwise. */ | |
1340 | ||
1341 | static int | |
1342 | run_breakpoint_commands_z_type (char z_type, CORE_ADDR addr) | |
d3ce09f5 SS |
1343 | { |
1344 | /* Fetch registers for the current inferior. */ | |
9aa76cd0 | 1345 | struct gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
d3ce09f5 SS |
1346 | ULONGEST value = 0; |
1347 | struct point_command_list *cl; | |
1348 | int err = 0; | |
5ae4861a | 1349 | struct eval_agent_expr_context ctx; |
d3ce09f5 SS |
1350 | |
1351 | if (bp == NULL) | |
802e8e6d | 1352 | return 1; |
d3ce09f5 | 1353 | |
0bfdf32f | 1354 | ctx.regcache = get_thread_regcache (current_thread, 1); |
5ae4861a YQ |
1355 | ctx.tframe = NULL; |
1356 | ctx.tpoint = NULL; | |
1357 | ||
d3ce09f5 SS |
1358 | for (cl = bp->command_list; |
1359 | cl && !value && !err; cl = cl->next) | |
1360 | { | |
1361 | /* Run the command. */ | |
5ae4861a | 1362 | err = gdb_eval_agent_expr (&ctx, cl->cmd, &value); |
d3ce09f5 SS |
1363 | |
1364 | /* If one command has a problem, stop digging the hole deeper. */ | |
1365 | if (err) | |
802e8e6d | 1366 | return 0; |
d3ce09f5 | 1367 | } |
802e8e6d PA |
1368 | |
1369 | return 1; | |
d3ce09f5 SS |
1370 | } |
1371 | ||
802e8e6d PA |
1372 | void |
1373 | run_breakpoint_commands (CORE_ADDR where) | |
1374 | { | |
1375 | /* Only check code (software or hardware) breakpoints. If one | |
1376 | command has a problem, stop digging the hole deeper. */ | |
1377 | if (run_breakpoint_commands_z_type (Z_PACKET_SW_BP, where)) | |
1378 | run_breakpoint_commands_z_type (Z_PACKET_HW_BP, where); | |
1379 | } | |
1380 | ||
1381 | /* See mem-break.h. */ | |
9f3a5c85 LM |
1382 | |
1383 | int | |
1384 | gdb_breakpoint_here (CORE_ADDR where) | |
1385 | { | |
802e8e6d PA |
1386 | /* Only check code (software or hardware) breakpoints. */ |
1387 | return (find_gdb_breakpoint (Z_PACKET_SW_BP, where, -1) != NULL | |
1388 | || find_gdb_breakpoint (Z_PACKET_HW_BP, where, -1) != NULL); | |
68070c10 PA |
1389 | } |
1390 | ||
d50171e4 | 1391 | void |
3b9a79ef | 1392 | set_single_step_breakpoint (CORE_ADDR stop_at, ptid_t ptid) |
611cb4a5 | 1393 | { |
3b9a79ef | 1394 | struct single_step_breakpoint *bp; |
bec903c9 | 1395 | |
e99b03dc | 1396 | gdb_assert (current_ptid.pid () == ptid.pid ()); |
414a389f | 1397 | |
3b9a79ef YQ |
1398 | bp = (struct single_step_breakpoint *) set_breakpoint_type_at (single_step_breakpoint, |
1399 | stop_at, NULL); | |
bec903c9 | 1400 | bp->ptid = ptid; |
611cb4a5 DJ |
1401 | } |
1402 | ||
1403 | void | |
3b9a79ef | 1404 | delete_single_step_breakpoints (struct thread_info *thread) |
611cb4a5 | 1405 | { |
bec903c9 | 1406 | struct process_info *proc = get_thread_process (thread); |
d50171e4 | 1407 | struct breakpoint *bp, **bp_link; |
611cb4a5 | 1408 | |
d50171e4 PA |
1409 | bp = proc->breakpoints; |
1410 | bp_link = &proc->breakpoints; | |
611cb4a5 | 1411 | |
d50171e4 PA |
1412 | while (bp) |
1413 | { | |
3b9a79ef | 1414 | if (bp->type == single_step_breakpoint |
d7e15655 | 1415 | && ((struct single_step_breakpoint *) bp)->ptid == ptid_of (thread)) |
414a389f | 1416 | { |
24583e45 | 1417 | scoped_restore_current_thread restore_thread; |
bec903c9 | 1418 | |
24583e45 | 1419 | switch_to_thread (thread); |
414a389f | 1420 | *bp_link = bp->next; |
8b07ae33 | 1421 | release_breakpoint (proc, bp); |
414a389f PA |
1422 | bp = *bp_link; |
1423 | } | |
1424 | else | |
1425 | { | |
1426 | bp_link = &bp->next; | |
1427 | bp = *bp_link; | |
1428 | } | |
d50171e4 PA |
1429 | } |
1430 | } | |
b65d95c5 | 1431 | |
d50171e4 | 1432 | static void |
8b07ae33 | 1433 | uninsert_raw_breakpoint (struct raw_breakpoint *bp) |
d50171e4 | 1434 | { |
802e8e6d PA |
1435 | if (bp->inserted < 0) |
1436 | { | |
c058728c SM |
1437 | threads_debug_printf ("Breakpoint at %s is marked insert-disabled.", |
1438 | paddress (bp->pc)); | |
802e8e6d PA |
1439 | } |
1440 | else if (bp->inserted > 0) | |
d50171e4 PA |
1441 | { |
1442 | int err; | |
1443 | ||
1444 | bp->inserted = 0; | |
802e8e6d | 1445 | |
52405d85 | 1446 | err = the_target->remove_point (bp->raw_type, bp->pc, bp->kind, bp); |
d50171e4 PA |
1447 | if (err != 0) |
1448 | { | |
1449 | bp->inserted = 1; | |
611cb4a5 | 1450 | |
c058728c SM |
1451 | threads_debug_printf ("Failed to uninsert raw breakpoint at 0x%s.", |
1452 | paddress (bp->pc)); | |
d50171e4 PA |
1453 | } |
1454 | } | |
611cb4a5 DJ |
1455 | } |
1456 | ||
1457 | void | |
d50171e4 | 1458 | uninsert_breakpoints_at (CORE_ADDR pc) |
611cb4a5 | 1459 | { |
802e8e6d | 1460 | struct process_info *proc = current_process (); |
8b07ae33 | 1461 | struct raw_breakpoint *bp; |
802e8e6d | 1462 | int found = 0; |
611cb4a5 | 1463 | |
802e8e6d PA |
1464 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1465 | if ((bp->raw_type == raw_bkpt_type_sw | |
1466 | || bp->raw_type == raw_bkpt_type_hw) | |
1467 | && bp->pc == pc) | |
1468 | { | |
1469 | found = 1; | |
1470 | ||
1471 | if (bp->inserted) | |
1472 | uninsert_raw_breakpoint (bp); | |
1473 | } | |
1474 | ||
1475 | if (!found) | |
d50171e4 PA |
1476 | { |
1477 | /* This can happen when we remove all breakpoints while handling | |
1478 | a step-over. */ | |
c058728c SM |
1479 | threads_debug_printf ("Could not find breakpoint at 0x%s " |
1480 | "in list (uninserting).", | |
1481 | paddress (pc)); | |
d50171e4 | 1482 | } |
611cb4a5 DJ |
1483 | } |
1484 | ||
0fb4aa4b PA |
1485 | void |
1486 | uninsert_all_breakpoints (void) | |
1487 | { | |
1488 | struct process_info *proc = current_process (); | |
1489 | struct raw_breakpoint *bp; | |
1490 | ||
1491 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
802e8e6d PA |
1492 | if ((bp->raw_type == raw_bkpt_type_sw |
1493 | || bp->raw_type == raw_bkpt_type_hw) | |
1494 | && bp->inserted) | |
0fb4aa4b PA |
1495 | uninsert_raw_breakpoint (bp); |
1496 | } | |
1497 | ||
2e7b624b | 1498 | void |
3b9a79ef | 1499 | uninsert_single_step_breakpoints (struct thread_info *thread) |
2e7b624b | 1500 | { |
bec903c9 | 1501 | struct process_info *proc = get_thread_process (thread); |
2e7b624b YQ |
1502 | struct breakpoint *bp; |
1503 | ||
1504 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1505 | { | |
3b9a79ef | 1506 | if (bp->type == single_step_breakpoint |
d7e15655 | 1507 | && ((struct single_step_breakpoint *) bp)->ptid == ptid_of (thread)) |
2e7b624b YQ |
1508 | { |
1509 | gdb_assert (bp->raw->inserted > 0); | |
1510 | ||
1511 | /* Only uninsert the raw breakpoint if it only belongs to a | |
1512 | reinsert breakpoint. */ | |
1513 | if (bp->raw->refcount == 1) | |
bec903c9 | 1514 | { |
24583e45 | 1515 | scoped_restore_current_thread restore_thread; |
bec903c9 | 1516 | |
24583e45 | 1517 | switch_to_thread (thread); |
bec903c9 | 1518 | uninsert_raw_breakpoint (bp->raw); |
bec903c9 | 1519 | } |
2e7b624b YQ |
1520 | } |
1521 | } | |
1522 | } | |
1523 | ||
d50171e4 | 1524 | static void |
8b07ae33 | 1525 | reinsert_raw_breakpoint (struct raw_breakpoint *bp) |
611cb4a5 | 1526 | { |
d50171e4 | 1527 | int err; |
611cb4a5 | 1528 | |
d50171e4 | 1529 | if (bp->inserted) |
85ba7d86 | 1530 | return; |
611cb4a5 | 1531 | |
52405d85 | 1532 | err = the_target->insert_point (bp->raw_type, bp->pc, bp->kind, bp); |
d50171e4 PA |
1533 | if (err == 0) |
1534 | bp->inserted = 1; | |
c058728c SM |
1535 | else |
1536 | threads_debug_printf ("Failed to reinsert breakpoint at 0x%s (%d).", | |
1537 | paddress (bp->pc), err); | |
611cb4a5 DJ |
1538 | } |
1539 | ||
d50171e4 PA |
1540 | void |
1541 | reinsert_breakpoints_at (CORE_ADDR pc) | |
611cb4a5 | 1542 | { |
802e8e6d | 1543 | struct process_info *proc = current_process (); |
8b07ae33 | 1544 | struct raw_breakpoint *bp; |
802e8e6d | 1545 | int found = 0; |
611cb4a5 | 1546 | |
802e8e6d PA |
1547 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1548 | if ((bp->raw_type == raw_bkpt_type_sw | |
1549 | || bp->raw_type == raw_bkpt_type_hw) | |
1550 | && bp->pc == pc) | |
1551 | { | |
1552 | found = 1; | |
1553 | ||
1554 | reinsert_raw_breakpoint (bp); | |
1555 | } | |
1556 | ||
1557 | if (!found) | |
611cb4a5 | 1558 | { |
d50171e4 PA |
1559 | /* This can happen when we remove all breakpoints while handling |
1560 | a step-over. */ | |
c058728c SM |
1561 | threads_debug_printf ("Could not find raw breakpoint at 0x%s " |
1562 | "in list (reinserting).", | |
1563 | paddress (pc)); | |
611cb4a5 | 1564 | } |
d50171e4 PA |
1565 | } |
1566 | ||
f79b145d | 1567 | int |
3b9a79ef | 1568 | has_single_step_breakpoints (struct thread_info *thread) |
f79b145d | 1569 | { |
bec903c9 | 1570 | struct process_info *proc = get_thread_process (thread); |
f79b145d YQ |
1571 | struct breakpoint *bp, **bp_link; |
1572 | ||
1573 | bp = proc->breakpoints; | |
1574 | bp_link = &proc->breakpoints; | |
1575 | ||
1576 | while (bp) | |
1577 | { | |
3b9a79ef | 1578 | if (bp->type == single_step_breakpoint |
d7e15655 | 1579 | && ((struct single_step_breakpoint *) bp)->ptid == ptid_of (thread)) |
f79b145d YQ |
1580 | return 1; |
1581 | else | |
1582 | { | |
1583 | bp_link = &bp->next; | |
1584 | bp = *bp_link; | |
1585 | } | |
1586 | } | |
1587 | ||
1588 | return 0; | |
1589 | } | |
1590 | ||
0fb4aa4b PA |
1591 | void |
1592 | reinsert_all_breakpoints (void) | |
1593 | { | |
1594 | struct process_info *proc = current_process (); | |
1595 | struct raw_breakpoint *bp; | |
1596 | ||
1597 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
802e8e6d PA |
1598 | if ((bp->raw_type == raw_bkpt_type_sw |
1599 | || bp->raw_type == raw_bkpt_type_hw) | |
1600 | && !bp->inserted) | |
0fb4aa4b PA |
1601 | reinsert_raw_breakpoint (bp); |
1602 | } | |
1603 | ||
2e7b624b | 1604 | void |
3b9a79ef | 1605 | reinsert_single_step_breakpoints (struct thread_info *thread) |
2e7b624b | 1606 | { |
bec903c9 | 1607 | struct process_info *proc = get_thread_process (thread); |
2e7b624b YQ |
1608 | struct breakpoint *bp; |
1609 | ||
1610 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1611 | { | |
3b9a79ef | 1612 | if (bp->type == single_step_breakpoint |
d7e15655 | 1613 | && ((struct single_step_breakpoint *) bp)->ptid == ptid_of (thread)) |
2e7b624b YQ |
1614 | { |
1615 | gdb_assert (bp->raw->inserted > 0); | |
1616 | ||
1617 | if (bp->raw->refcount == 1) | |
bec903c9 | 1618 | { |
24583e45 | 1619 | scoped_restore_current_thread restore_thread; |
bec903c9 | 1620 | |
24583e45 | 1621 | switch_to_thread (thread); |
bec903c9 | 1622 | reinsert_raw_breakpoint (bp->raw); |
bec903c9 | 1623 | } |
2e7b624b YQ |
1624 | } |
1625 | } | |
1626 | } | |
1627 | ||
d50171e4 PA |
1628 | void |
1629 | check_breakpoints (CORE_ADDR stop_pc) | |
1630 | { | |
1631 | struct process_info *proc = current_process (); | |
1632 | struct breakpoint *bp, **bp_link; | |
1633 | ||
1634 | bp = proc->breakpoints; | |
1635 | bp_link = &proc->breakpoints; | |
1636 | ||
1637 | while (bp) | |
b65d95c5 | 1638 | { |
802e8e6d PA |
1639 | struct raw_breakpoint *raw = bp->raw; |
1640 | ||
1641 | if ((raw->raw_type == raw_bkpt_type_sw | |
1642 | || raw->raw_type == raw_bkpt_type_hw) | |
1643 | && raw->pc == stop_pc) | |
d50171e4 | 1644 | { |
802e8e6d | 1645 | if (!raw->inserted) |
d50171e4 PA |
1646 | { |
1647 | warning ("Hit a removed breakpoint?"); | |
1648 | return; | |
1649 | } | |
1650 | ||
9aa76cd0 | 1651 | if (bp->type == other_breakpoint) |
d50171e4 | 1652 | { |
9aa76cd0 YQ |
1653 | struct other_breakpoint *other_bp |
1654 | = (struct other_breakpoint *) bp; | |
1655 | ||
1656 | if (other_bp->handler != NULL && (*other_bp->handler) (stop_pc)) | |
1657 | { | |
1658 | *bp_link = bp->next; | |
d50171e4 | 1659 | |
9aa76cd0 | 1660 | release_breakpoint (proc, bp); |
d50171e4 | 1661 | |
9aa76cd0 YQ |
1662 | bp = *bp_link; |
1663 | continue; | |
1664 | } | |
d50171e4 PA |
1665 | } |
1666 | } | |
1667 | ||
1668 | bp_link = &bp->next; | |
1669 | bp = *bp_link; | |
b65d95c5 | 1670 | } |
611cb4a5 DJ |
1671 | } |
1672 | ||
d50171e4 PA |
1673 | int |
1674 | breakpoint_here (CORE_ADDR addr) | |
1675 | { | |
802e8e6d PA |
1676 | struct process_info *proc = current_process (); |
1677 | struct raw_breakpoint *bp; | |
1678 | ||
1679 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
1680 | if ((bp->raw_type == raw_bkpt_type_sw | |
1681 | || bp->raw_type == raw_bkpt_type_hw) | |
1682 | && bp->pc == addr) | |
1683 | return 1; | |
1684 | ||
1685 | return 0; | |
d50171e4 PA |
1686 | } |
1687 | ||
1688 | int | |
1689 | breakpoint_inserted_here (CORE_ADDR addr) | |
1690 | { | |
802e8e6d | 1691 | struct process_info *proc = current_process (); |
8b07ae33 | 1692 | struct raw_breakpoint *bp; |
d50171e4 | 1693 | |
802e8e6d PA |
1694 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1695 | if ((bp->raw_type == raw_bkpt_type_sw | |
1696 | || bp->raw_type == raw_bkpt_type_hw) | |
1697 | && bp->pc == addr | |
1698 | && bp->inserted) | |
1699 | return 1; | |
d50171e4 | 1700 | |
802e8e6d | 1701 | return 0; |
d50171e4 PA |
1702 | } |
1703 | ||
582511be PA |
1704 | /* See mem-break.h. */ |
1705 | ||
1706 | int | |
1707 | software_breakpoint_inserted_here (CORE_ADDR addr) | |
1708 | { | |
1709 | struct process_info *proc = current_process (); | |
1710 | struct raw_breakpoint *bp; | |
1711 | ||
1712 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
1713 | if (bp->raw_type == raw_bkpt_type_sw | |
1714 | && bp->pc == addr | |
1715 | && bp->inserted) | |
1716 | return 1; | |
1717 | ||
1718 | return 0; | |
1719 | } | |
1720 | ||
1721 | /* See mem-break.h. */ | |
1722 | ||
1723 | int | |
1724 | hardware_breakpoint_inserted_here (CORE_ADDR addr) | |
1725 | { | |
1726 | struct process_info *proc = current_process (); | |
1727 | struct raw_breakpoint *bp; | |
1728 | ||
1729 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
1730 | if (bp->raw_type == raw_bkpt_type_hw | |
1731 | && bp->pc == addr | |
1732 | && bp->inserted) | |
1733 | return 1; | |
1734 | ||
1735 | return 0; | |
1736 | } | |
1737 | ||
2d97cd35 AT |
1738 | /* See mem-break.h. */ |
1739 | ||
1740 | int | |
3b9a79ef | 1741 | single_step_breakpoint_inserted_here (CORE_ADDR addr) |
2d97cd35 AT |
1742 | { |
1743 | struct process_info *proc = current_process (); | |
1744 | struct breakpoint *bp; | |
1745 | ||
1746 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
3b9a79ef | 1747 | if (bp->type == single_step_breakpoint |
2d97cd35 AT |
1748 | && bp->raw->pc == addr |
1749 | && bp->raw->inserted) | |
1750 | return 1; | |
1751 | ||
1752 | return 0; | |
1753 | } | |
1754 | ||
d3bbe7a0 PA |
1755 | static int |
1756 | validate_inserted_breakpoint (struct raw_breakpoint *bp) | |
1757 | { | |
1758 | unsigned char *buf; | |
1759 | int err; | |
1760 | ||
1761 | gdb_assert (bp->inserted); | |
802e8e6d | 1762 | gdb_assert (bp->raw_type == raw_bkpt_type_sw); |
d3bbe7a0 | 1763 | |
27165294 | 1764 | buf = (unsigned char *) alloca (bp_size (bp)); |
52405d85 | 1765 | err = the_target->read_memory (bp->pc, buf, bp_size (bp)); |
27165294 | 1766 | if (err || memcmp (buf, bp_opcode (bp), bp_size (bp)) != 0) |
d3bbe7a0 PA |
1767 | { |
1768 | /* Tag it as gone. */ | |
802e8e6d | 1769 | bp->inserted = -1; |
d3bbe7a0 PA |
1770 | return 0; |
1771 | } | |
1772 | ||
1773 | return 1; | |
1774 | } | |
1775 | ||
1776 | static void | |
1777 | delete_disabled_breakpoints (void) | |
1778 | { | |
1779 | struct process_info *proc = current_process (); | |
1780 | struct breakpoint *bp, *next; | |
1781 | ||
1782 | for (bp = proc->breakpoints; bp != NULL; bp = next) | |
1783 | { | |
1784 | next = bp->next; | |
802e8e6d | 1785 | if (bp->raw->inserted < 0) |
8376a3cb | 1786 | { |
3b9a79ef | 1787 | /* If single_step_breakpoints become disabled, that means the |
8376a3cb | 1788 | manipulations (insertion and removal) of them are wrong. */ |
3b9a79ef | 1789 | gdb_assert (bp->type != single_step_breakpoint); |
8376a3cb YQ |
1790 | delete_breakpoint_1 (proc, bp); |
1791 | } | |
d3bbe7a0 PA |
1792 | } |
1793 | } | |
1794 | ||
1795 | /* Check if breakpoints we inserted still appear to be inserted. They | |
1796 | may disappear due to a shared library unload, and worse, a new | |
1797 | shared library may be reloaded at the same address as the | |
1798 | previously unloaded one. If that happens, we should make sure that | |
1799 | the shadow memory of the old breakpoints isn't used when reading or | |
1800 | writing memory. */ | |
1801 | ||
1802 | void | |
1803 | validate_breakpoints (void) | |
1804 | { | |
1805 | struct process_info *proc = current_process (); | |
1806 | struct breakpoint *bp; | |
1807 | ||
1808 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1809 | { | |
802e8e6d PA |
1810 | struct raw_breakpoint *raw = bp->raw; |
1811 | ||
1812 | if (raw->raw_type == raw_bkpt_type_sw && raw->inserted > 0) | |
1813 | validate_inserted_breakpoint (raw); | |
d3bbe7a0 PA |
1814 | } |
1815 | ||
1816 | delete_disabled_breakpoints (); | |
1817 | } | |
1818 | ||
611cb4a5 | 1819 | void |
f450004a | 1820 | check_mem_read (CORE_ADDR mem_addr, unsigned char *buf, int mem_len) |
611cb4a5 | 1821 | { |
95954743 | 1822 | struct process_info *proc = current_process (); |
8b07ae33 | 1823 | struct raw_breakpoint *bp = proc->raw_breakpoints; |
fa593d66 | 1824 | struct fast_tracepoint_jump *jp = proc->fast_tracepoint_jumps; |
611cb4a5 | 1825 | CORE_ADDR mem_end = mem_addr + mem_len; |
d3bbe7a0 | 1826 | int disabled_one = 0; |
611cb4a5 | 1827 | |
fa593d66 PA |
1828 | for (; jp != NULL; jp = jp->next) |
1829 | { | |
1830 | CORE_ADDR bp_end = jp->pc + jp->length; | |
1831 | CORE_ADDR start, end; | |
1832 | int copy_offset, copy_len, buf_offset; | |
1833 | ||
6bf36717 JK |
1834 | gdb_assert (fast_tracepoint_jump_shadow (jp) >= buf + mem_len |
1835 | || buf >= fast_tracepoint_jump_shadow (jp) + (jp)->length); | |
1836 | ||
fa593d66 PA |
1837 | if (mem_addr >= bp_end) |
1838 | continue; | |
1839 | if (jp->pc >= mem_end) | |
1840 | continue; | |
1841 | ||
1842 | start = jp->pc; | |
1843 | if (mem_addr > start) | |
1844 | start = mem_addr; | |
1845 | ||
1846 | end = bp_end; | |
1847 | if (end > mem_end) | |
1848 | end = mem_end; | |
1849 | ||
1850 | copy_len = end - start; | |
1851 | copy_offset = start - jp->pc; | |
1852 | buf_offset = start - mem_addr; | |
1853 | ||
1854 | if (jp->inserted) | |
1855 | memcpy (buf + buf_offset, | |
1856 | fast_tracepoint_jump_shadow (jp) + copy_offset, | |
1857 | copy_len); | |
1858 | } | |
1859 | ||
611cb4a5 DJ |
1860 | for (; bp != NULL; bp = bp->next) |
1861 | { | |
27165294 | 1862 | CORE_ADDR bp_end = bp->pc + bp_size (bp); |
611cb4a5 DJ |
1863 | CORE_ADDR start, end; |
1864 | int copy_offset, copy_len, buf_offset; | |
1865 | ||
802e8e6d PA |
1866 | if (bp->raw_type != raw_bkpt_type_sw) |
1867 | continue; | |
1868 | ||
6bf36717 JK |
1869 | gdb_assert (bp->old_data >= buf + mem_len |
1870 | || buf >= &bp->old_data[sizeof (bp->old_data)]); | |
1871 | ||
611cb4a5 DJ |
1872 | if (mem_addr >= bp_end) |
1873 | continue; | |
1874 | if (bp->pc >= mem_end) | |
1875 | continue; | |
1876 | ||
1877 | start = bp->pc; | |
1878 | if (mem_addr > start) | |
1879 | start = mem_addr; | |
1880 | ||
1881 | end = bp_end; | |
1882 | if (end > mem_end) | |
1883 | end = mem_end; | |
1884 | ||
1885 | copy_len = end - start; | |
1886 | copy_offset = start - bp->pc; | |
1887 | buf_offset = start - mem_addr; | |
1888 | ||
802e8e6d | 1889 | if (bp->inserted > 0) |
d3bbe7a0 PA |
1890 | { |
1891 | if (validate_inserted_breakpoint (bp)) | |
1892 | memcpy (buf + buf_offset, bp->old_data + copy_offset, copy_len); | |
1893 | else | |
1894 | disabled_one = 1; | |
1895 | } | |
611cb4a5 | 1896 | } |
d3bbe7a0 PA |
1897 | |
1898 | if (disabled_one) | |
1899 | delete_disabled_breakpoints (); | |
611cb4a5 DJ |
1900 | } |
1901 | ||
1902 | void | |
b9fd1791 PA |
1903 | check_mem_write (CORE_ADDR mem_addr, unsigned char *buf, |
1904 | const unsigned char *myaddr, int mem_len) | |
611cb4a5 | 1905 | { |
95954743 | 1906 | struct process_info *proc = current_process (); |
8b07ae33 | 1907 | struct raw_breakpoint *bp = proc->raw_breakpoints; |
fa593d66 | 1908 | struct fast_tracepoint_jump *jp = proc->fast_tracepoint_jumps; |
611cb4a5 | 1909 | CORE_ADDR mem_end = mem_addr + mem_len; |
d3bbe7a0 | 1910 | int disabled_one = 0; |
611cb4a5 | 1911 | |
fa593d66 PA |
1912 | /* First fast tracepoint jumps, then breakpoint traps on top. */ |
1913 | ||
1914 | for (; jp != NULL; jp = jp->next) | |
1915 | { | |
1916 | CORE_ADDR jp_end = jp->pc + jp->length; | |
1917 | CORE_ADDR start, end; | |
1918 | int copy_offset, copy_len, buf_offset; | |
1919 | ||
6bf36717 JK |
1920 | gdb_assert (fast_tracepoint_jump_shadow (jp) >= myaddr + mem_len |
1921 | || myaddr >= fast_tracepoint_jump_shadow (jp) + (jp)->length); | |
1922 | gdb_assert (fast_tracepoint_jump_insn (jp) >= buf + mem_len | |
1923 | || buf >= fast_tracepoint_jump_insn (jp) + (jp)->length); | |
1924 | ||
fa593d66 PA |
1925 | if (mem_addr >= jp_end) |
1926 | continue; | |
1927 | if (jp->pc >= mem_end) | |
1928 | continue; | |
1929 | ||
1930 | start = jp->pc; | |
1931 | if (mem_addr > start) | |
1932 | start = mem_addr; | |
1933 | ||
1934 | end = jp_end; | |
1935 | if (end > mem_end) | |
1936 | end = mem_end; | |
1937 | ||
1938 | copy_len = end - start; | |
1939 | copy_offset = start - jp->pc; | |
1940 | buf_offset = start - mem_addr; | |
1941 | ||
1942 | memcpy (fast_tracepoint_jump_shadow (jp) + copy_offset, | |
b9fd1791 | 1943 | myaddr + buf_offset, copy_len); |
fa593d66 PA |
1944 | if (jp->inserted) |
1945 | memcpy (buf + buf_offset, | |
1946 | fast_tracepoint_jump_insn (jp) + copy_offset, copy_len); | |
1947 | } | |
1948 | ||
611cb4a5 DJ |
1949 | for (; bp != NULL; bp = bp->next) |
1950 | { | |
27165294 | 1951 | CORE_ADDR bp_end = bp->pc + bp_size (bp); |
611cb4a5 DJ |
1952 | CORE_ADDR start, end; |
1953 | int copy_offset, copy_len, buf_offset; | |
1954 | ||
802e8e6d PA |
1955 | if (bp->raw_type != raw_bkpt_type_sw) |
1956 | continue; | |
1957 | ||
6bf36717 JK |
1958 | gdb_assert (bp->old_data >= myaddr + mem_len |
1959 | || myaddr >= &bp->old_data[sizeof (bp->old_data)]); | |
1960 | ||
611cb4a5 DJ |
1961 | if (mem_addr >= bp_end) |
1962 | continue; | |
1963 | if (bp->pc >= mem_end) | |
1964 | continue; | |
1965 | ||
1966 | start = bp->pc; | |
1967 | if (mem_addr > start) | |
1968 | start = mem_addr; | |
1969 | ||
1970 | end = bp_end; | |
1971 | if (end > mem_end) | |
1972 | end = mem_end; | |
1973 | ||
1974 | copy_len = end - start; | |
1975 | copy_offset = start - bp->pc; | |
1976 | buf_offset = start - mem_addr; | |
1977 | ||
b9fd1791 | 1978 | memcpy (bp->old_data + copy_offset, myaddr + buf_offset, copy_len); |
802e8e6d | 1979 | if (bp->inserted > 0) |
d3bbe7a0 PA |
1980 | { |
1981 | if (validate_inserted_breakpoint (bp)) | |
27165294 | 1982 | memcpy (buf + buf_offset, bp_opcode (bp) + copy_offset, copy_len); |
d3bbe7a0 PA |
1983 | else |
1984 | disabled_one = 1; | |
1985 | } | |
611cb4a5 | 1986 | } |
d3bbe7a0 PA |
1987 | |
1988 | if (disabled_one) | |
1989 | delete_disabled_breakpoints (); | |
611cb4a5 | 1990 | } |
ae13219e | 1991 | |
95954743 | 1992 | /* Delete all breakpoints, and un-insert them from the inferior. */ |
ae13219e DJ |
1993 | |
1994 | void | |
1995 | delete_all_breakpoints (void) | |
1996 | { | |
95954743 PA |
1997 | struct process_info *proc = current_process (); |
1998 | ||
1999 | while (proc->breakpoints) | |
8b07ae33 | 2000 | delete_breakpoint_1 (proc, proc->breakpoints); |
95954743 PA |
2001 | } |
2002 | ||
f9e39928 | 2003 | /* Clear the "inserted" flag in all breakpoints. */ |
95954743 PA |
2004 | |
2005 | void | |
f9e39928 | 2006 | mark_breakpoints_out (struct process_info *proc) |
95954743 | 2007 | { |
8b07ae33 | 2008 | struct raw_breakpoint *raw_bp; |
95954743 | 2009 | |
8b07ae33 PA |
2010 | for (raw_bp = proc->raw_breakpoints; raw_bp != NULL; raw_bp = raw_bp->next) |
2011 | raw_bp->inserted = 0; | |
f9e39928 PA |
2012 | } |
2013 | ||
2014 | /* Release all breakpoints, but do not try to un-insert them from the | |
2015 | inferior. */ | |
2016 | ||
2017 | void | |
2018 | free_all_breakpoints (struct process_info *proc) | |
2019 | { | |
2020 | mark_breakpoints_out (proc); | |
8b07ae33 PA |
2021 | |
2022 | /* Note: use PROC explicitly instead of deferring to | |
2023 | delete_all_breakpoints --- CURRENT_INFERIOR may already have been | |
2024 | released when we get here. There should be no call to | |
2025 | current_process from here on. */ | |
95954743 | 2026 | while (proc->breakpoints) |
8b07ae33 | 2027 | delete_breakpoint_1 (proc, proc->breakpoints); |
ae13219e | 2028 | } |
ddcbc397 DB |
2029 | |
2030 | /* Clone an agent expression. */ | |
2031 | ||
2032 | static struct agent_expr * | |
2033 | clone_agent_expr (const struct agent_expr *src_ax) | |
2034 | { | |
2035 | struct agent_expr *ax; | |
2036 | ||
8d749320 | 2037 | ax = XCNEW (struct agent_expr); |
ddcbc397 | 2038 | ax->length = src_ax->length; |
224c3ddb | 2039 | ax->bytes = (unsigned char *) xcalloc (ax->length, 1); |
ddcbc397 DB |
2040 | memcpy (ax->bytes, src_ax->bytes, ax->length); |
2041 | return ax; | |
2042 | } | |
2043 | ||
2044 | /* Deep-copy the contents of one breakpoint to another. */ | |
2045 | ||
2046 | static struct breakpoint * | |
bec903c9 | 2047 | clone_one_breakpoint (const struct breakpoint *src, ptid_t ptid) |
ddcbc397 DB |
2048 | { |
2049 | struct breakpoint *dest; | |
2050 | struct raw_breakpoint *dest_raw; | |
ddcbc397 DB |
2051 | |
2052 | /* Clone the raw breakpoint. */ | |
8d749320 | 2053 | dest_raw = XCNEW (struct raw_breakpoint); |
ddcbc397 DB |
2054 | dest_raw->raw_type = src->raw->raw_type; |
2055 | dest_raw->refcount = src->raw->refcount; | |
2056 | dest_raw->pc = src->raw->pc; | |
27165294 | 2057 | dest_raw->kind = src->raw->kind; |
ddcbc397 DB |
2058 | memcpy (dest_raw->old_data, src->raw->old_data, MAX_BREAKPOINT_LEN); |
2059 | dest_raw->inserted = src->raw->inserted; | |
2060 | ||
2061 | /* Clone the high-level breakpoint. */ | |
9aa76cd0 | 2062 | if (is_gdb_breakpoint (src->type)) |
ddcbc397 | 2063 | { |
9aa76cd0 YQ |
2064 | struct gdb_breakpoint *gdb_dest = XCNEW (struct gdb_breakpoint); |
2065 | struct point_cond_list *current_cond; | |
2066 | struct point_cond_list *new_cond; | |
2067 | struct point_cond_list *cond_tail = NULL; | |
2068 | struct point_command_list *current_cmd; | |
2069 | struct point_command_list *new_cmd; | |
2070 | struct point_command_list *cmd_tail = NULL; | |
2071 | ||
2072 | /* Clone the condition list. */ | |
2073 | for (current_cond = ((struct gdb_breakpoint *) src)->cond_list; | |
2074 | current_cond != NULL; | |
2075 | current_cond = current_cond->next) | |
2076 | { | |
2077 | new_cond = XCNEW (struct point_cond_list); | |
2078 | new_cond->cond = clone_agent_expr (current_cond->cond); | |
2079 | APPEND_TO_LIST (&gdb_dest->cond_list, new_cond, cond_tail); | |
2080 | } | |
2081 | ||
2082 | /* Clone the command list. */ | |
2083 | for (current_cmd = ((struct gdb_breakpoint *) src)->command_list; | |
2084 | current_cmd != NULL; | |
2085 | current_cmd = current_cmd->next) | |
2086 | { | |
2087 | new_cmd = XCNEW (struct point_command_list); | |
2088 | new_cmd->cmd = clone_agent_expr (current_cmd->cmd); | |
2089 | new_cmd->persistence = current_cmd->persistence; | |
2090 | APPEND_TO_LIST (&gdb_dest->command_list, new_cmd, cmd_tail); | |
2091 | } | |
2092 | ||
2093 | dest = (struct breakpoint *) gdb_dest; | |
ddcbc397 | 2094 | } |
9aa76cd0 YQ |
2095 | else if (src->type == other_breakpoint) |
2096 | { | |
2097 | struct other_breakpoint *other_dest = XCNEW (struct other_breakpoint); | |
ddcbc397 | 2098 | |
9aa76cd0 YQ |
2099 | other_dest->handler = ((struct other_breakpoint *) src)->handler; |
2100 | dest = (struct breakpoint *) other_dest; | |
2101 | } | |
3b9a79ef | 2102 | else if (src->type == single_step_breakpoint) |
ddcbc397 | 2103 | { |
3b9a79ef YQ |
2104 | struct single_step_breakpoint *ss_dest |
2105 | = XCNEW (struct single_step_breakpoint); | |
9aa76cd0 | 2106 | |
3b9a79ef YQ |
2107 | dest = (struct breakpoint *) ss_dest; |
2108 | /* Since single-step breakpoint is thread specific, don't copy | |
bec903c9 | 2109 | thread id from SRC, use ID instead. */ |
3b9a79ef | 2110 | ss_dest->ptid = ptid; |
ddcbc397 | 2111 | } |
9aa76cd0 YQ |
2112 | else |
2113 | gdb_assert_not_reached ("unhandled breakpoint type"); | |
2114 | ||
2115 | dest->type = src->type; | |
2116 | dest->raw = dest_raw; | |
ddcbc397 DB |
2117 | |
2118 | return dest; | |
2119 | } | |
2120 | ||
63c40ec7 | 2121 | /* See mem-break.h. */ |
ddcbc397 DB |
2122 | |
2123 | void | |
63c40ec7 YQ |
2124 | clone_all_breakpoints (struct thread_info *child_thread, |
2125 | const struct thread_info *parent_thread) | |
ddcbc397 DB |
2126 | { |
2127 | const struct breakpoint *bp; | |
2128 | struct breakpoint *new_bkpt; | |
2129 | struct breakpoint *bkpt_tail = NULL; | |
2130 | struct raw_breakpoint *raw_bkpt_tail = NULL; | |
63c40ec7 YQ |
2131 | struct process_info *child_proc = get_thread_process (child_thread); |
2132 | struct process_info *parent_proc = get_thread_process (parent_thread); | |
2133 | struct breakpoint **new_list = &child_proc->breakpoints; | |
2134 | struct raw_breakpoint **new_raw_list = &child_proc->raw_breakpoints; | |
ddcbc397 | 2135 | |
63c40ec7 | 2136 | for (bp = parent_proc->breakpoints; bp != NULL; bp = bp->next) |
ddcbc397 | 2137 | { |
bec903c9 | 2138 | new_bkpt = clone_one_breakpoint (bp, ptid_of (child_thread)); |
ddcbc397 DB |
2139 | APPEND_TO_LIST (new_list, new_bkpt, bkpt_tail); |
2140 | APPEND_TO_LIST (new_raw_list, new_bkpt->raw, raw_bkpt_tail); | |
2141 | } | |
2142 | } |