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611cb4a5 | 1 | /* Memory breakpoint operations for the remote server for GDB. |
618f726f | 2 | Copyright (C) 2002-2016 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 | |
414a389f PA |
136 | /* A basic-software-single-step breakpoint. */ |
137 | reinsert_breakpoint, | |
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 | ||
9aa76cd0 YQ |
209 | /* Reinsert breakpoint. */ |
210 | ||
211 | struct reinsert_breakpoint | |
212 | { | |
213 | struct breakpoint base; | |
214 | }; | |
215 | ||
27165294 AT |
216 | /* Return the breakpoint size from its kind. */ |
217 | ||
218 | static int | |
219 | bp_size (struct raw_breakpoint *bp) | |
220 | { | |
221 | int size = 0; | |
222 | ||
223 | the_target->sw_breakpoint_from_kind (bp->kind, &size); | |
224 | return size; | |
225 | } | |
226 | ||
227 | /* Return the breakpoint opcode from its kind. */ | |
228 | ||
229 | static const gdb_byte * | |
230 | bp_opcode (struct raw_breakpoint *bp) | |
231 | { | |
232 | int size = 0; | |
233 | ||
234 | return the_target->sw_breakpoint_from_kind (bp->kind, &size); | |
235 | } | |
236 | ||
802e8e6d PA |
237 | /* See mem-break.h. */ |
238 | ||
932539e3 | 239 | enum target_hw_bp_type |
802e8e6d | 240 | raw_bkpt_type_to_target_hw_bp_type (enum raw_bkpt_type raw_type) |
932539e3 | 241 | { |
802e8e6d | 242 | switch (raw_type) |
932539e3 | 243 | { |
802e8e6d | 244 | case raw_bkpt_type_hw: |
932539e3 | 245 | return hw_execute; |
802e8e6d | 246 | case raw_bkpt_type_write_wp: |
932539e3 | 247 | return hw_write; |
802e8e6d | 248 | case raw_bkpt_type_read_wp: |
932539e3 | 249 | return hw_read; |
802e8e6d | 250 | case raw_bkpt_type_access_wp: |
932539e3 PA |
251 | return hw_access; |
252 | default: | |
38e08fca GB |
253 | internal_error (__FILE__, __LINE__, |
254 | "bad raw breakpoint type %d", (int) raw_type); | |
802e8e6d PA |
255 | } |
256 | } | |
257 | ||
258 | /* See mem-break.h. */ | |
259 | ||
260 | static enum bkpt_type | |
261 | Z_packet_to_bkpt_type (char z_type) | |
262 | { | |
263 | gdb_assert ('0' <= z_type && z_type <= '4'); | |
264 | ||
d2412fa5 | 265 | return (enum bkpt_type) (gdb_breakpoint_Z0 + (z_type - '0')); |
802e8e6d PA |
266 | } |
267 | ||
268 | /* See mem-break.h. */ | |
269 | ||
270 | enum raw_bkpt_type | |
271 | Z_packet_to_raw_bkpt_type (char z_type) | |
272 | { | |
273 | switch (z_type) | |
274 | { | |
275 | case Z_PACKET_SW_BP: | |
276 | return raw_bkpt_type_sw; | |
277 | case Z_PACKET_HW_BP: | |
278 | return raw_bkpt_type_hw; | |
279 | case Z_PACKET_WRITE_WP: | |
280 | return raw_bkpt_type_write_wp; | |
281 | case Z_PACKET_READ_WP: | |
282 | return raw_bkpt_type_read_wp; | |
283 | case Z_PACKET_ACCESS_WP: | |
284 | return raw_bkpt_type_access_wp; | |
285 | default: | |
286 | gdb_assert_not_reached ("unhandled Z packet type."); | |
932539e3 PA |
287 | } |
288 | } | |
289 | ||
9aa76cd0 YQ |
290 | /* Return true if breakpoint TYPE is a GDB breakpoint. */ |
291 | ||
292 | static int | |
293 | is_gdb_breakpoint (enum bkpt_type type) | |
294 | { | |
295 | return (type == gdb_breakpoint_Z0 | |
296 | || type == gdb_breakpoint_Z1 | |
297 | || type == gdb_breakpoint_Z2 | |
298 | || type == gdb_breakpoint_Z3 | |
299 | || type == gdb_breakpoint_Z4); | |
300 | } | |
301 | ||
d3ce09f5 | 302 | int |
5b3da067 | 303 | any_persistent_commands (void) |
d3ce09f5 SS |
304 | { |
305 | struct process_info *proc = current_process (); | |
306 | struct breakpoint *bp; | |
307 | struct point_command_list *cl; | |
308 | ||
309 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
310 | { | |
9aa76cd0 YQ |
311 | if (is_gdb_breakpoint (bp->type)) |
312 | { | |
313 | struct gdb_breakpoint *gdb_bp = (struct gdb_breakpoint *) bp; | |
314 | ||
315 | for (cl = gdb_bp->command_list; cl != NULL; cl = cl->next) | |
316 | if (cl->persistence) | |
317 | return 1; | |
318 | } | |
d3ce09f5 SS |
319 | } |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
802e8e6d PA |
324 | /* Find low-level breakpoint of type TYPE at address ADDR that is not |
325 | insert-disabled. Returns NULL if not found. */ | |
326 | ||
8b07ae33 | 327 | static struct raw_breakpoint * |
802e8e6d | 328 | find_enabled_raw_code_breakpoint_at (CORE_ADDR addr, enum raw_bkpt_type type) |
8b07ae33 PA |
329 | { |
330 | struct process_info *proc = current_process (); | |
331 | struct raw_breakpoint *bp; | |
414a389f | 332 | |
8b07ae33 | 333 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
802e8e6d PA |
334 | if (bp->pc == addr |
335 | && bp->raw_type == type | |
336 | && bp->inserted >= 0) | |
8b07ae33 PA |
337 | return bp; |
338 | ||
339 | return NULL; | |
340 | } | |
341 | ||
802e8e6d PA |
342 | /* Find low-level breakpoint of type TYPE at address ADDR. Returns |
343 | NULL if not found. */ | |
344 | ||
8b07ae33 | 345 | static struct raw_breakpoint * |
27165294 | 346 | find_raw_breakpoint_at (CORE_ADDR addr, enum raw_bkpt_type type, int kind) |
611cb4a5 | 347 | { |
95954743 | 348 | struct process_info *proc = current_process (); |
8b07ae33 | 349 | struct raw_breakpoint *bp; |
802e8e6d PA |
350 | |
351 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
27165294 | 352 | if (bp->pc == addr && bp->raw_type == type && bp->kind == kind) |
802e8e6d PA |
353 | return bp; |
354 | ||
355 | return NULL; | |
356 | } | |
357 | ||
358 | /* See mem-break.h. */ | |
359 | ||
360 | int | |
361 | insert_memory_breakpoint (struct raw_breakpoint *bp) | |
362 | { | |
6bf36717 | 363 | unsigned char buf[MAX_BREAKPOINT_LEN]; |
802e8e6d | 364 | int err; |
611cb4a5 | 365 | |
fa593d66 PA |
366 | /* Note that there can be fast tracepoint jumps installed in the |
367 | same memory range, so to get at the original memory, we need to | |
368 | use read_inferior_memory, which masks those out. */ | |
27165294 | 369 | err = read_inferior_memory (bp->pc, buf, bp_size (bp)); |
d50171e4 PA |
370 | if (err != 0) |
371 | { | |
372 | if (debug_threads) | |
87ce2a04 DE |
373 | debug_printf ("Failed to read shadow memory of" |
374 | " breakpoint at 0x%s (%s).\n", | |
802e8e6d | 375 | paddress (bp->pc), strerror (err)); |
d50171e4 | 376 | } |
802e8e6d PA |
377 | else |
378 | { | |
27165294 | 379 | memcpy (bp->old_data, buf, bp_size (bp)); |
611cb4a5 | 380 | |
27165294 AT |
381 | err = (*the_target->write_memory) (bp->pc, bp_opcode (bp), |
382 | bp_size (bp)); | |
802e8e6d PA |
383 | if (err != 0) |
384 | { | |
385 | if (debug_threads) | |
386 | debug_printf ("Failed to insert breakpoint at 0x%s (%s).\n", | |
387 | paddress (bp->pc), strerror (err)); | |
388 | } | |
389 | } | |
390 | return err != 0 ? -1 : 0; | |
391 | } | |
392 | ||
393 | /* See mem-break.h */ | |
394 | ||
395 | int | |
396 | remove_memory_breakpoint (struct raw_breakpoint *bp) | |
397 | { | |
398 | unsigned char buf[MAX_BREAKPOINT_LEN]; | |
399 | int err; | |
400 | ||
401 | /* Since there can be trap breakpoints inserted in the same address | |
402 | range, we use `write_inferior_memory', which takes care of | |
403 | layering breakpoints on top of fast tracepoints, and on top of | |
404 | the buffer we pass it. This works because the caller has already | |
405 | either unlinked the breakpoint or marked it uninserted. Also | |
406 | note that we need to pass the current shadow contents, because | |
407 | write_inferior_memory updates any shadow memory with what we pass | |
408 | here, and we want that to be a nop. */ | |
27165294 AT |
409 | memcpy (buf, bp->old_data, bp_size (bp)); |
410 | err = write_inferior_memory (bp->pc, buf, bp_size (bp)); | |
d50171e4 PA |
411 | if (err != 0) |
412 | { | |
413 | if (debug_threads) | |
802e8e6d PA |
414 | debug_printf ("Failed to uninsert raw breakpoint " |
415 | "at 0x%s (%s) while deleting it.\n", | |
416 | paddress (bp->pc), strerror (err)); | |
417 | } | |
418 | return err != 0 ? -1 : 0; | |
419 | } | |
420 | ||
27165294 | 421 | /* Set a RAW breakpoint of type TYPE and kind KIND at WHERE. On |
802e8e6d PA |
422 | success, a pointer to the new breakpoint is returned. On failure, |
423 | returns NULL and writes the error code to *ERR. */ | |
424 | ||
425 | static struct raw_breakpoint * | |
27165294 | 426 | set_raw_breakpoint_at (enum raw_bkpt_type type, CORE_ADDR where, int kind, |
802e8e6d PA |
427 | int *err) |
428 | { | |
429 | struct process_info *proc = current_process (); | |
430 | struct raw_breakpoint *bp; | |
20249ae4 | 431 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); |
802e8e6d PA |
432 | |
433 | if (type == raw_bkpt_type_sw || type == raw_bkpt_type_hw) | |
434 | { | |
435 | bp = find_enabled_raw_code_breakpoint_at (where, type); | |
27165294 | 436 | if (bp != NULL && bp->kind != kind) |
802e8e6d | 437 | { |
27165294 | 438 | /* A different kind than previously seen. The previous |
802e8e6d PA |
439 | breakpoint must be gone then. */ |
440 | if (debug_threads) | |
27165294 AT |
441 | debug_printf ("Inconsistent breakpoint kind? Was %d, now %d.\n", |
442 | bp->kind, kind); | |
802e8e6d PA |
443 | bp->inserted = -1; |
444 | bp = NULL; | |
445 | } | |
446 | } | |
447 | else | |
27165294 | 448 | bp = find_raw_breakpoint_at (where, type, kind); |
802e8e6d | 449 | |
20249ae4 | 450 | if (bp == NULL) |
802e8e6d | 451 | { |
20249ae4 YQ |
452 | bp = XCNEW (struct raw_breakpoint); |
453 | bp->pc = where; | |
454 | bp->kind = kind; | |
455 | bp->raw_type = type; | |
456 | make_cleanup (xfree, bp); | |
802e8e6d PA |
457 | } |
458 | ||
20249ae4 | 459 | if (!bp->inserted) |
802e8e6d | 460 | { |
20249ae4 YQ |
461 | *err = the_target->insert_point (bp->raw_type, bp->pc, bp->kind, bp); |
462 | if (*err != 0) | |
463 | { | |
464 | if (debug_threads) | |
465 | debug_printf ("Failed to insert breakpoint at 0x%s (%d).\n", | |
466 | paddress (where), *err); | |
467 | ||
468 | do_cleanups (old_chain); | |
469 | return NULL; | |
470 | } | |
471 | ||
472 | bp->inserted = 1; | |
d50171e4 PA |
473 | } |
474 | ||
20249ae4 YQ |
475 | discard_cleanups (old_chain); |
476 | ||
477 | /* Link the breakpoint in, if this is the first reference. */ | |
478 | if (++bp->refcount == 1) | |
479 | { | |
480 | bp->next = proc->raw_breakpoints; | |
481 | proc->raw_breakpoints = bp; | |
482 | } | |
d50171e4 PA |
483 | return bp; |
484 | } | |
485 | ||
fa593d66 PA |
486 | /* Notice that breakpoint traps are always installed on top of fast |
487 | tracepoint jumps. This is even if the fast tracepoint is installed | |
488 | at a later time compared to when the breakpoint was installed. | |
489 | This means that a stopping breakpoint or tracepoint has higher | |
490 | "priority". In turn, this allows having fast and slow tracepoints | |
491 | (and breakpoints) at the same address behave correctly. */ | |
492 | ||
493 | ||
494 | /* A fast tracepoint jump. */ | |
495 | ||
496 | struct fast_tracepoint_jump | |
497 | { | |
498 | struct fast_tracepoint_jump *next; | |
499 | ||
500 | /* A reference count. GDB can install more than one fast tracepoint | |
501 | at the same address (each with its own action list, for | |
502 | example). */ | |
503 | int refcount; | |
504 | ||
505 | /* The fast tracepoint's insertion address. There can only be one | |
506 | of these for a given PC. */ | |
507 | CORE_ADDR pc; | |
508 | ||
509 | /* Non-zero if this fast tracepoint jump is currently inserted in | |
510 | the inferior. */ | |
511 | int inserted; | |
512 | ||
513 | /* The length of the jump instruction. */ | |
514 | int length; | |
515 | ||
516 | /* A poor-man's flexible array member, holding both the jump | |
517 | instruction to insert, and a copy of the instruction that would | |
518 | be in memory had not been a jump there (the shadow memory of the | |
519 | tracepoint jump). */ | |
520 | unsigned char insn_and_shadow[0]; | |
521 | }; | |
522 | ||
523 | /* Fast tracepoint FP's jump instruction to insert. */ | |
524 | #define fast_tracepoint_jump_insn(fp) \ | |
525 | ((fp)->insn_and_shadow + 0) | |
526 | ||
527 | /* The shadow memory of fast tracepoint jump FP. */ | |
528 | #define fast_tracepoint_jump_shadow(fp) \ | |
529 | ((fp)->insn_and_shadow + (fp)->length) | |
530 | ||
531 | ||
532 | /* Return the fast tracepoint jump set at WHERE. */ | |
533 | ||
534 | static struct fast_tracepoint_jump * | |
535 | find_fast_tracepoint_jump_at (CORE_ADDR where) | |
536 | { | |
537 | struct process_info *proc = current_process (); | |
538 | struct fast_tracepoint_jump *jp; | |
539 | ||
540 | for (jp = proc->fast_tracepoint_jumps; jp != NULL; jp = jp->next) | |
541 | if (jp->pc == where) | |
542 | return jp; | |
543 | ||
544 | return NULL; | |
545 | } | |
546 | ||
547 | int | |
548 | fast_tracepoint_jump_here (CORE_ADDR where) | |
549 | { | |
550 | struct fast_tracepoint_jump *jp = find_fast_tracepoint_jump_at (where); | |
551 | ||
552 | return (jp != NULL); | |
553 | } | |
554 | ||
555 | int | |
556 | delete_fast_tracepoint_jump (struct fast_tracepoint_jump *todel) | |
557 | { | |
558 | struct fast_tracepoint_jump *bp, **bp_link; | |
559 | int ret; | |
560 | struct process_info *proc = current_process (); | |
561 | ||
562 | bp = proc->fast_tracepoint_jumps; | |
563 | bp_link = &proc->fast_tracepoint_jumps; | |
564 | ||
565 | while (bp) | |
566 | { | |
567 | if (bp == todel) | |
568 | { | |
569 | if (--bp->refcount == 0) | |
570 | { | |
571 | struct fast_tracepoint_jump *prev_bp_link = *bp_link; | |
6bf36717 | 572 | unsigned char *buf; |
fa593d66 PA |
573 | |
574 | /* Unlink it. */ | |
575 | *bp_link = bp->next; | |
576 | ||
577 | /* Since there can be breakpoints inserted in the same | |
578 | address range, we use `write_inferior_memory', which | |
579 | takes care of layering breakpoints on top of fast | |
580 | tracepoints, and on top of the buffer we pass it. | |
581 | This works because we've already unlinked the fast | |
582 | tracepoint jump above. Also note that we need to | |
583 | pass the current shadow contents, because | |
584 | write_inferior_memory updates any shadow memory with | |
585 | what we pass here, and we want that to be a nop. */ | |
224c3ddb | 586 | buf = (unsigned char *) alloca (bp->length); |
6bf36717 JK |
587 | memcpy (buf, fast_tracepoint_jump_shadow (bp), bp->length); |
588 | ret = write_inferior_memory (bp->pc, buf, bp->length); | |
fa593d66 PA |
589 | if (ret != 0) |
590 | { | |
591 | /* Something went wrong, relink the jump. */ | |
592 | *bp_link = prev_bp_link; | |
593 | ||
594 | if (debug_threads) | |
87ce2a04 DE |
595 | debug_printf ("Failed to uninsert fast tracepoint jump " |
596 | "at 0x%s (%s) while deleting it.\n", | |
597 | paddress (bp->pc), strerror (ret)); | |
fa593d66 PA |
598 | return ret; |
599 | } | |
600 | ||
601 | free (bp); | |
602 | } | |
603 | ||
604 | return 0; | |
605 | } | |
606 | else | |
607 | { | |
608 | bp_link = &bp->next; | |
609 | bp = *bp_link; | |
610 | } | |
611 | } | |
612 | ||
613 | warning ("Could not find fast tracepoint jump in list."); | |
614 | return ENOENT; | |
615 | } | |
616 | ||
5c73ff4e YQ |
617 | void |
618 | inc_ref_fast_tracepoint_jump (struct fast_tracepoint_jump *jp) | |
619 | { | |
620 | jp->refcount++; | |
621 | } | |
622 | ||
fa593d66 PA |
623 | struct fast_tracepoint_jump * |
624 | set_fast_tracepoint_jump (CORE_ADDR where, | |
625 | unsigned char *insn, ULONGEST length) | |
626 | { | |
627 | struct process_info *proc = current_process (); | |
628 | struct fast_tracepoint_jump *jp; | |
629 | int err; | |
6bf36717 | 630 | unsigned char *buf; |
fa593d66 PA |
631 | |
632 | /* We refcount fast tracepoint jumps. Check if we already know | |
633 | about a jump at this address. */ | |
634 | jp = find_fast_tracepoint_jump_at (where); | |
635 | if (jp != NULL) | |
636 | { | |
637 | jp->refcount++; | |
638 | return jp; | |
639 | } | |
640 | ||
641 | /* We don't, so create a new object. Double the length, because the | |
642 | flexible array member holds both the jump insn, and the | |
643 | shadow. */ | |
224c3ddb | 644 | jp = (struct fast_tracepoint_jump *) xcalloc (1, sizeof (*jp) + (length * 2)); |
fa593d66 PA |
645 | jp->pc = where; |
646 | jp->length = length; | |
647 | memcpy (fast_tracepoint_jump_insn (jp), insn, length); | |
648 | jp->refcount = 1; | |
224c3ddb | 649 | buf = (unsigned char *) alloca (length); |
fa593d66 PA |
650 | |
651 | /* Note that there can be trap breakpoints inserted in the same | |
652 | address range. To access the original memory contents, we use | |
653 | `read_inferior_memory', which masks out breakpoints. */ | |
6bf36717 | 654 | err = read_inferior_memory (where, buf, length); |
fa593d66 PA |
655 | if (err != 0) |
656 | { | |
657 | if (debug_threads) | |
87ce2a04 DE |
658 | debug_printf ("Failed to read shadow memory of" |
659 | " fast tracepoint at 0x%s (%s).\n", | |
660 | paddress (where), strerror (err)); | |
fa593d66 PA |
661 | free (jp); |
662 | return NULL; | |
663 | } | |
6bf36717 | 664 | memcpy (fast_tracepoint_jump_shadow (jp), buf, length); |
fa593d66 PA |
665 | |
666 | /* Link the jump in. */ | |
667 | jp->inserted = 1; | |
668 | jp->next = proc->fast_tracepoint_jumps; | |
669 | proc->fast_tracepoint_jumps = jp; | |
670 | ||
671 | /* Since there can be trap breakpoints inserted in the same address | |
672 | range, we use use `write_inferior_memory', which takes care of | |
673 | layering breakpoints on top of fast tracepoints, on top of the | |
674 | buffer we pass it. This works because we've already linked in | |
675 | the fast tracepoint jump above. Also note that we need to pass | |
676 | the current shadow contents, because write_inferior_memory | |
677 | updates any shadow memory with what we pass here, and we want | |
678 | that to be a nop. */ | |
6bf36717 | 679 | err = write_inferior_memory (where, buf, length); |
fa593d66 PA |
680 | if (err != 0) |
681 | { | |
682 | if (debug_threads) | |
87ce2a04 DE |
683 | debug_printf ("Failed to insert fast tracepoint jump at 0x%s (%s).\n", |
684 | paddress (where), strerror (err)); | |
fa593d66 PA |
685 | |
686 | /* Unlink it. */ | |
687 | proc->fast_tracepoint_jumps = jp->next; | |
688 | free (jp); | |
689 | ||
690 | return NULL; | |
691 | } | |
692 | ||
693 | return jp; | |
694 | } | |
695 | ||
696 | void | |
697 | uninsert_fast_tracepoint_jumps_at (CORE_ADDR pc) | |
698 | { | |
699 | struct fast_tracepoint_jump *jp; | |
700 | int err; | |
701 | ||
702 | jp = find_fast_tracepoint_jump_at (pc); | |
703 | if (jp == NULL) | |
704 | { | |
705 | /* This can happen when we remove all breakpoints while handling | |
706 | a step-over. */ | |
707 | if (debug_threads) | |
87ce2a04 DE |
708 | debug_printf ("Could not find fast tracepoint jump at 0x%s " |
709 | "in list (uninserting).\n", | |
710 | paddress (pc)); | |
fa593d66 PA |
711 | return; |
712 | } | |
713 | ||
714 | if (jp->inserted) | |
715 | { | |
6bf36717 JK |
716 | unsigned char *buf; |
717 | ||
fa593d66 PA |
718 | jp->inserted = 0; |
719 | ||
720 | /* Since there can be trap breakpoints inserted in the same | |
721 | address range, we use use `write_inferior_memory', which | |
722 | takes care of layering breakpoints on top of fast | |
723 | tracepoints, and on top of the buffer we pass it. This works | |
724 | because we've already marked the fast tracepoint fast | |
725 | tracepoint jump uninserted above. Also note that we need to | |
726 | pass the current shadow contents, because | |
727 | write_inferior_memory updates any shadow memory with what we | |
728 | pass here, and we want that to be a nop. */ | |
224c3ddb | 729 | buf = (unsigned char *) alloca (jp->length); |
6bf36717 JK |
730 | memcpy (buf, fast_tracepoint_jump_shadow (jp), jp->length); |
731 | err = write_inferior_memory (jp->pc, buf, jp->length); | |
fa593d66 PA |
732 | if (err != 0) |
733 | { | |
734 | jp->inserted = 1; | |
735 | ||
736 | if (debug_threads) | |
87ce2a04 DE |
737 | debug_printf ("Failed to uninsert fast tracepoint jump at" |
738 | " 0x%s (%s).\n", | |
739 | paddress (pc), strerror (err)); | |
fa593d66 PA |
740 | } |
741 | } | |
742 | } | |
743 | ||
744 | void | |
745 | reinsert_fast_tracepoint_jumps_at (CORE_ADDR where) | |
746 | { | |
747 | struct fast_tracepoint_jump *jp; | |
748 | int err; | |
6bf36717 | 749 | unsigned char *buf; |
fa593d66 PA |
750 | |
751 | jp = find_fast_tracepoint_jump_at (where); | |
752 | if (jp == NULL) | |
753 | { | |
754 | /* This can happen when we remove breakpoints when a tracepoint | |
755 | hit causes a tracing stop, while handling a step-over. */ | |
756 | if (debug_threads) | |
87ce2a04 DE |
757 | debug_printf ("Could not find fast tracepoint jump at 0x%s " |
758 | "in list (reinserting).\n", | |
759 | paddress (where)); | |
fa593d66 PA |
760 | return; |
761 | } | |
762 | ||
763 | if (jp->inserted) | |
764 | error ("Jump already inserted at reinsert time."); | |
765 | ||
766 | jp->inserted = 1; | |
767 | ||
768 | /* Since there can be trap breakpoints inserted in the same address | |
769 | range, we use `write_inferior_memory', which takes care of | |
770 | layering breakpoints on top of fast tracepoints, and on top of | |
771 | the buffer we pass it. This works because we've already marked | |
772 | the fast tracepoint jump inserted above. Also note that we need | |
773 | to pass the current shadow contents, because | |
774 | write_inferior_memory updates any shadow memory with what we pass | |
775 | here, and we want that to be a nop. */ | |
224c3ddb | 776 | buf = (unsigned char *) alloca (jp->length); |
6bf36717 JK |
777 | memcpy (buf, fast_tracepoint_jump_shadow (jp), jp->length); |
778 | err = write_inferior_memory (where, buf, jp->length); | |
fa593d66 PA |
779 | if (err != 0) |
780 | { | |
781 | jp->inserted = 0; | |
782 | ||
783 | if (debug_threads) | |
87ce2a04 DE |
784 | debug_printf ("Failed to reinsert fast tracepoint jump at" |
785 | " 0x%s (%s).\n", | |
786 | paddress (where), strerror (err)); | |
fa593d66 PA |
787 | } |
788 | } | |
789 | ||
802e8e6d | 790 | /* Set a high-level breakpoint of type TYPE, with low level type |
27165294 | 791 | RAW_TYPE and kind KIND, at WHERE. On success, a pointer to the new |
802e8e6d PA |
792 | breakpoint is returned. On failure, returns NULL and writes the |
793 | error code to *ERR. HANDLER is called when the breakpoint is hit. | |
794 | HANDLER should return 1 if the breakpoint should be deleted, 0 | |
795 | otherwise. */ | |
796 | ||
797 | static struct breakpoint * | |
798 | set_breakpoint (enum bkpt_type type, enum raw_bkpt_type raw_type, | |
27165294 | 799 | CORE_ADDR where, int kind, |
802e8e6d | 800 | int (*handler) (CORE_ADDR), int *err) |
d50171e4 PA |
801 | { |
802 | struct process_info *proc = current_process (); | |
803 | struct breakpoint *bp; | |
8b07ae33 | 804 | struct raw_breakpoint *raw; |
d50171e4 | 805 | |
27165294 | 806 | raw = set_raw_breakpoint_at (raw_type, where, kind, err); |
d50171e4 | 807 | |
8b07ae33 | 808 | if (raw == NULL) |
d50171e4 PA |
809 | { |
810 | /* warn? */ | |
414a389f | 811 | return NULL; |
d50171e4 PA |
812 | } |
813 | ||
9aa76cd0 YQ |
814 | if (is_gdb_breakpoint (type)) |
815 | { | |
816 | struct gdb_breakpoint *gdb_bp = XCNEW (struct gdb_breakpoint); | |
817 | ||
818 | bp = (struct breakpoint *) gdb_bp; | |
819 | gdb_assert (handler == NULL); | |
820 | } | |
821 | else if (type == other_breakpoint) | |
822 | { | |
823 | struct other_breakpoint *other_bp = XCNEW (struct other_breakpoint); | |
824 | ||
825 | other_bp->handler = handler; | |
826 | bp = (struct breakpoint *) other_bp; | |
827 | } | |
828 | else if (type == reinsert_breakpoint) | |
829 | { | |
830 | struct reinsert_breakpoint *reinsert_bp | |
831 | = XCNEW (struct reinsert_breakpoint); | |
8b07ae33 | 832 | |
9aa76cd0 YQ |
833 | bp = (struct breakpoint *) reinsert_bp; |
834 | } | |
835 | else | |
836 | gdb_assert_not_reached ("unhandled breakpoint type"); | |
837 | ||
838 | bp->type = type; | |
8b07ae33 | 839 | bp->raw = raw; |
611cb4a5 | 840 | |
95954743 PA |
841 | bp->next = proc->breakpoints; |
842 | proc->breakpoints = bp; | |
414a389f PA |
843 | |
844 | return bp; | |
611cb4a5 DJ |
845 | } |
846 | ||
811f8301 | 847 | /* Set breakpoint of TYPE on address WHERE with handler HANDLER. */ |
802e8e6d | 848 | |
811f8301 YQ |
849 | static struct breakpoint * |
850 | set_breakpoint_type_at (enum bkpt_type type, CORE_ADDR where, | |
851 | int (*handler) (CORE_ADDR)) | |
802e8e6d PA |
852 | { |
853 | int err_ignored; | |
27165294 | 854 | CORE_ADDR placed_address = where; |
2e6ee069 | 855 | int breakpoint_kind = target_breakpoint_kind_from_pc (&placed_address); |
802e8e6d | 856 | |
811f8301 | 857 | return set_breakpoint (type, raw_bkpt_type_sw, |
27165294 | 858 | placed_address, breakpoint_kind, handler, |
802e8e6d PA |
859 | &err_ignored); |
860 | } | |
861 | ||
811f8301 YQ |
862 | /* See mem-break.h */ |
863 | ||
864 | struct breakpoint * | |
865 | set_breakpoint_at (CORE_ADDR where, int (*handler) (CORE_ADDR)) | |
866 | { | |
867 | return set_breakpoint_type_at (other_breakpoint, where, handler); | |
868 | } | |
869 | ||
802e8e6d | 870 | |
8b07ae33 PA |
871 | static int |
872 | delete_raw_breakpoint (struct process_info *proc, struct raw_breakpoint *todel) | |
873 | { | |
874 | struct raw_breakpoint *bp, **bp_link; | |
875 | int ret; | |
876 | ||
877 | bp = proc->raw_breakpoints; | |
878 | bp_link = &proc->raw_breakpoints; | |
879 | ||
880 | while (bp) | |
881 | { | |
882 | if (bp == todel) | |
883 | { | |
802e8e6d | 884 | if (bp->inserted > 0) |
8b07ae33 PA |
885 | { |
886 | struct raw_breakpoint *prev_bp_link = *bp_link; | |
887 | ||
888 | *bp_link = bp->next; | |
889 | ||
27165294 | 890 | ret = the_target->remove_point (bp->raw_type, bp->pc, bp->kind, |
802e8e6d | 891 | bp); |
8b07ae33 PA |
892 | if (ret != 0) |
893 | { | |
894 | /* Something went wrong, relink the breakpoint. */ | |
895 | *bp_link = prev_bp_link; | |
896 | ||
897 | if (debug_threads) | |
87ce2a04 | 898 | debug_printf ("Failed to uninsert raw breakpoint " |
802e8e6d PA |
899 | "at 0x%s while deleting it.\n", |
900 | paddress (bp->pc)); | |
8b07ae33 PA |
901 | return ret; |
902 | } | |
8b07ae33 PA |
903 | } |
904 | else | |
905 | *bp_link = bp->next; | |
906 | ||
907 | free (bp); | |
908 | return 0; | |
909 | } | |
910 | else | |
911 | { | |
912 | bp_link = &bp->next; | |
913 | bp = *bp_link; | |
914 | } | |
915 | } | |
916 | ||
917 | warning ("Could not find raw breakpoint in list."); | |
918 | return ENOENT; | |
919 | } | |
920 | ||
921 | static int | |
922 | release_breakpoint (struct process_info *proc, struct breakpoint *bp) | |
923 | { | |
924 | int newrefcount; | |
925 | int ret; | |
926 | ||
927 | newrefcount = bp->raw->refcount - 1; | |
928 | if (newrefcount == 0) | |
929 | { | |
930 | ret = delete_raw_breakpoint (proc, bp->raw); | |
931 | if (ret != 0) | |
932 | return ret; | |
933 | } | |
934 | else | |
935 | bp->raw->refcount = newrefcount; | |
936 | ||
937 | free (bp); | |
938 | ||
939 | return 0; | |
940 | } | |
941 | ||
942 | static int | |
943 | delete_breakpoint_1 (struct process_info *proc, struct breakpoint *todel) | |
611cb4a5 | 944 | { |
414a389f | 945 | struct breakpoint *bp, **bp_link; |
8b07ae33 | 946 | int err; |
611cb4a5 | 947 | |
414a389f PA |
948 | bp = proc->breakpoints; |
949 | bp_link = &proc->breakpoints; | |
950 | ||
951 | while (bp) | |
611cb4a5 | 952 | { |
414a389f | 953 | if (bp == todel) |
611cb4a5 | 954 | { |
414a389f PA |
955 | *bp_link = bp->next; |
956 | ||
8b07ae33 PA |
957 | err = release_breakpoint (proc, bp); |
958 | if (err != 0) | |
959 | return err; | |
960 | ||
961 | bp = *bp_link; | |
962 | return 0; | |
611cb4a5 | 963 | } |
414a389f PA |
964 | else |
965 | { | |
966 | bp_link = &bp->next; | |
967 | bp = *bp_link; | |
968 | } | |
611cb4a5 | 969 | } |
414a389f | 970 | |
611cb4a5 | 971 | warning ("Could not find breakpoint in list."); |
8b07ae33 PA |
972 | return ENOENT; |
973 | } | |
974 | ||
219f2f23 | 975 | int |
8b07ae33 PA |
976 | delete_breakpoint (struct breakpoint *todel) |
977 | { | |
978 | struct process_info *proc = current_process (); | |
979 | return delete_breakpoint_1 (proc, todel); | |
611cb4a5 DJ |
980 | } |
981 | ||
27165294 AT |
982 | /* Locate a GDB breakpoint of type Z_TYPE and kind KIND placed at |
983 | address ADDR and return a pointer to its structure. If KIND is -1, | |
984 | the breakpoint's kind is ignored. */ | |
51aa91f9 | 985 | |
9aa76cd0 | 986 | static struct gdb_breakpoint * |
27165294 | 987 | find_gdb_breakpoint (char z_type, CORE_ADDR addr, int kind) |
611cb4a5 | 988 | { |
95954743 | 989 | struct process_info *proc = current_process (); |
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)) |
9aa76cd0 | 996 | return (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' | |
ef7cab6b | 1005 | && the_target->supports_z_point_type != NULL |
802e8e6d PA |
1006 | && the_target->supports_z_point_type (z_type)); |
1007 | } | |
1008 | ||
27165294 | 1009 | /* Create a new GDB breakpoint of type Z_TYPE at ADDR with kind KIND. |
802e8e6d PA |
1010 | Returns a pointer to the newly created breakpoint on success. On |
1011 | failure returns NULL and sets *ERR to either -1 for error, or 1 if | |
1012 | Z_TYPE breakpoints are not supported on this target. */ | |
1013 | ||
9aa76cd0 | 1014 | static struct gdb_breakpoint * |
27165294 | 1015 | set_gdb_breakpoint_1 (char z_type, CORE_ADDR addr, int kind, int *err) |
68070c10 | 1016 | { |
9aa76cd0 | 1017 | struct gdb_breakpoint *bp; |
802e8e6d PA |
1018 | enum bkpt_type type; |
1019 | enum raw_bkpt_type raw_type; | |
1020 | ||
1021 | /* If we see GDB inserting a second code breakpoint at the same | |
1022 | address, then either: GDB is updating the breakpoint's conditions | |
1023 | or commands; or, the first breakpoint must have disappeared due | |
1024 | to a shared library unload. On targets where the shared | |
1025 | libraries are handled by userspace, like SVR4, for example, | |
1026 | GDBserver can't tell if a library was loaded or unloaded. Since | |
1027 | we refcount raw breakpoints, we must be careful to make sure GDB | |
1028 | breakpoints never contribute more than one reference. if we | |
1029 | didn't do this, in case the previous breakpoint is gone due to a | |
1030 | shared library unload, we'd just increase the refcount of the | |
1031 | previous breakpoint at this address, but the trap was not planted | |
1032 | in the inferior anymore, thus the breakpoint would never be hit. | |
1033 | Note this must be careful to not create a window where | |
1034 | breakpoints are removed from the target, for non-stop, in case | |
1035 | the target can poke at memory while the program is running. */ | |
1036 | if (z_type == Z_PACKET_SW_BP | |
1037 | || z_type == Z_PACKET_HW_BP) | |
1038 | { | |
1039 | bp = find_gdb_breakpoint (z_type, addr, -1); | |
8b07ae33 | 1040 | |
802e8e6d PA |
1041 | if (bp != NULL) |
1042 | { | |
9aa76cd0 | 1043 | if (bp->base.raw->kind != kind) |
802e8e6d | 1044 | { |
27165294 | 1045 | /* A different kind than previously seen. The previous |
802e8e6d | 1046 | breakpoint must be gone then. */ |
9aa76cd0 YQ |
1047 | bp->base.raw->inserted = -1; |
1048 | delete_breakpoint ((struct breakpoint *) bp); | |
802e8e6d PA |
1049 | bp = NULL; |
1050 | } | |
1051 | else if (z_type == Z_PACKET_SW_BP) | |
1052 | { | |
1053 | /* Check if the breakpoint is actually gone from the | |
1054 | target, due to an solib unload, for example. Might | |
1055 | as well validate _all_ breakpoints. */ | |
1056 | validate_breakpoints (); | |
1057 | ||
1058 | /* Breakpoints that don't pass validation are | |
1059 | deleted. */ | |
1060 | bp = find_gdb_breakpoint (z_type, addr, -1); | |
1061 | } | |
1062 | } | |
1063 | } | |
1064 | else | |
1065 | { | |
27165294 | 1066 | /* Data breakpoints for the same address but different kind are |
802e8e6d PA |
1067 | expected. GDB doesn't merge these. The backend gets to do |
1068 | that if it wants/can. */ | |
27165294 | 1069 | bp = find_gdb_breakpoint (z_type, addr, kind); |
802e8e6d | 1070 | } |
8b07ae33 | 1071 | |
d3bbe7a0 PA |
1072 | if (bp != NULL) |
1073 | { | |
802e8e6d PA |
1074 | /* We already know about this breakpoint, there's nothing else |
1075 | to do - GDB's reference is already accounted for. Note that | |
1076 | whether the breakpoint inserted is left as is - we may be | |
1077 | stepping over it, for example, in which case we don't want to | |
1078 | force-reinsert it. */ | |
1079 | return bp; | |
1080 | } | |
1081 | ||
1082 | raw_type = Z_packet_to_raw_bkpt_type (z_type); | |
1083 | type = Z_packet_to_bkpt_type (z_type); | |
9aa76cd0 YQ |
1084 | return (struct gdb_breakpoint *) set_breakpoint (type, raw_type, addr, |
1085 | kind, NULL, err); | |
802e8e6d PA |
1086 | } |
1087 | ||
1088 | static int | |
1089 | check_gdb_bp_preconditions (char z_type, int *err) | |
1090 | { | |
1091 | /* As software/memory breakpoints work by poking at memory, we need | |
1092 | to prepare to access memory. If that operation fails, we need to | |
1093 | return error. Seeing an error, if this is the first breakpoint | |
1094 | of that type that GDB tries to insert, GDB would then assume the | |
1095 | breakpoint type is supported, but it may actually not be. So we | |
1096 | need to check whether the type is supported at all before | |
1097 | preparing to access memory. */ | |
1098 | if (!z_type_supported (z_type)) | |
1099 | { | |
1100 | *err = 1; | |
1101 | return 0; | |
1102 | } | |
a67a9fae PA |
1103 | |
1104 | return 1; | |
802e8e6d PA |
1105 | } |
1106 | ||
1107 | /* See mem-break.h. This is a wrapper for set_gdb_breakpoint_1 that | |
1108 | knows to prepare to access memory for Z0 breakpoints. */ | |
d3bbe7a0 | 1109 | |
9aa76cd0 | 1110 | struct gdb_breakpoint * |
27165294 | 1111 | set_gdb_breakpoint (char z_type, CORE_ADDR addr, int kind, int *err) |
802e8e6d | 1112 | { |
9aa76cd0 | 1113 | struct gdb_breakpoint *bp; |
802e8e6d PA |
1114 | |
1115 | if (!check_gdb_bp_preconditions (z_type, err)) | |
1116 | return NULL; | |
1117 | ||
1118 | /* If inserting a software/memory breakpoint, need to prepare to | |
1119 | access memory. */ | |
1120 | if (z_type == Z_PACKET_SW_BP) | |
1121 | { | |
a67a9fae PA |
1122 | if (prepare_to_access_memory () != 0) |
1123 | { | |
1124 | *err = -1; | |
1125 | return NULL; | |
1126 | } | |
d3bbe7a0 PA |
1127 | } |
1128 | ||
27165294 | 1129 | bp = set_gdb_breakpoint_1 (z_type, addr, kind, err); |
8b07ae33 | 1130 | |
802e8e6d PA |
1131 | if (z_type == Z_PACKET_SW_BP) |
1132 | done_accessing_memory (); | |
1133 | ||
1134 | return bp; | |
8b07ae33 PA |
1135 | } |
1136 | ||
27165294 | 1137 | /* Delete a GDB breakpoint of type Z_TYPE and kind KIND previously |
802e8e6d PA |
1138 | inserted at ADDR with set_gdb_breakpoint_at. Returns 0 on success, |
1139 | -1 on error, and 1 if Z_TYPE breakpoints are not supported on this | |
1140 | target. */ | |
1141 | ||
1142 | static int | |
27165294 | 1143 | delete_gdb_breakpoint_1 (char z_type, CORE_ADDR addr, int kind) |
8b07ae33 | 1144 | { |
9aa76cd0 | 1145 | struct gdb_breakpoint *bp; |
8b07ae33 PA |
1146 | int err; |
1147 | ||
27165294 | 1148 | bp = find_gdb_breakpoint (z_type, addr, kind); |
8b07ae33 PA |
1149 | if (bp == NULL) |
1150 | return -1; | |
1151 | ||
0a261ed8 PA |
1152 | /* Before deleting the breakpoint, make sure to free its condition |
1153 | and command lists. */ | |
1154 | clear_breakpoint_conditions_and_commands (bp); | |
9aa76cd0 | 1155 | err = delete_breakpoint ((struct breakpoint *) bp); |
802e8e6d | 1156 | if (err != 0) |
8b07ae33 PA |
1157 | return -1; |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
802e8e6d PA |
1162 | /* See mem-break.h. This is a wrapper for delete_gdb_breakpoint that |
1163 | knows to prepare to access memory for Z0 breakpoints. */ | |
1164 | ||
1165 | int | |
27165294 | 1166 | delete_gdb_breakpoint (char z_type, CORE_ADDR addr, int kind) |
802e8e6d PA |
1167 | { |
1168 | int ret; | |
1169 | ||
1170 | if (!check_gdb_bp_preconditions (z_type, &ret)) | |
1171 | return ret; | |
1172 | ||
1173 | /* If inserting a software/memory breakpoint, need to prepare to | |
1174 | access memory. */ | |
1175 | if (z_type == Z_PACKET_SW_BP) | |
1176 | { | |
1177 | int err; | |
1178 | ||
1179 | err = prepare_to_access_memory (); | |
1180 | if (err != 0) | |
1181 | return -1; | |
1182 | } | |
1183 | ||
27165294 | 1184 | ret = delete_gdb_breakpoint_1 (z_type, addr, kind); |
802e8e6d PA |
1185 | |
1186 | if (z_type == Z_PACKET_SW_BP) | |
1187 | done_accessing_memory (); | |
1188 | ||
1189 | return ret; | |
1190 | } | |
1191 | ||
1192 | /* Clear all conditions associated with a breakpoint. */ | |
9f3a5c85 | 1193 | |
0a261ed8 | 1194 | static void |
9aa76cd0 | 1195 | clear_breakpoint_conditions (struct gdb_breakpoint *bp) |
9f3a5c85 | 1196 | { |
412c89dd | 1197 | struct point_cond_list *cond; |
9f3a5c85 | 1198 | |
802e8e6d | 1199 | if (bp->cond_list == NULL) |
9f3a5c85 LM |
1200 | return; |
1201 | ||
1202 | cond = bp->cond_list; | |
9f3a5c85 LM |
1203 | |
1204 | while (cond != NULL) | |
1205 | { | |
412c89dd LM |
1206 | struct point_cond_list *cond_next; |
1207 | ||
1208 | cond_next = cond->next; | |
0a261ed8 | 1209 | gdb_free_agent_expr (cond->cond); |
9f3a5c85 | 1210 | free (cond); |
412c89dd | 1211 | cond = cond_next; |
9f3a5c85 LM |
1212 | } |
1213 | ||
1214 | bp->cond_list = NULL; | |
1215 | } | |
1216 | ||
0a261ed8 PA |
1217 | /* Clear all commands associated with a breakpoint. */ |
1218 | ||
1219 | static void | |
9aa76cd0 | 1220 | clear_breakpoint_commands (struct gdb_breakpoint *bp) |
0a261ed8 PA |
1221 | { |
1222 | struct point_command_list *cmd; | |
1223 | ||
1224 | if (bp->command_list == NULL) | |
1225 | return; | |
1226 | ||
1227 | cmd = bp->command_list; | |
1228 | ||
1229 | while (cmd != NULL) | |
1230 | { | |
1231 | struct point_command_list *cmd_next; | |
1232 | ||
1233 | cmd_next = cmd->next; | |
1234 | gdb_free_agent_expr (cmd->cmd); | |
1235 | free (cmd); | |
1236 | cmd = cmd_next; | |
1237 | } | |
1238 | ||
1239 | bp->command_list = NULL; | |
1240 | } | |
1241 | ||
1242 | void | |
9aa76cd0 | 1243 | clear_breakpoint_conditions_and_commands (struct gdb_breakpoint *bp) |
0a261ed8 PA |
1244 | { |
1245 | clear_breakpoint_conditions (bp); | |
1246 | clear_breakpoint_commands (bp); | |
1247 | } | |
1248 | ||
9f3a5c85 LM |
1249 | /* Add condition CONDITION to GDBserver's breakpoint BP. */ |
1250 | ||
802e8e6d | 1251 | static void |
9aa76cd0 | 1252 | add_condition_to_breakpoint (struct gdb_breakpoint *bp, |
9f3a5c85 LM |
1253 | struct agent_expr *condition) |
1254 | { | |
1255 | struct point_cond_list *new_cond; | |
1256 | ||
1257 | /* Create new condition. */ | |
8d749320 | 1258 | new_cond = XCNEW (struct point_cond_list); |
9f3a5c85 LM |
1259 | new_cond->cond = condition; |
1260 | ||
1261 | /* Add condition to the list. */ | |
1262 | new_cond->next = bp->cond_list; | |
1263 | bp->cond_list = new_cond; | |
1264 | } | |
1265 | ||
802e8e6d | 1266 | /* Add a target-side condition CONDITION to a breakpoint. */ |
9f3a5c85 | 1267 | |
8b07ae33 | 1268 | int |
9aa76cd0 | 1269 | add_breakpoint_condition (struct gdb_breakpoint *bp, char **condition) |
9f3a5c85 | 1270 | { |
9f3a5c85 LM |
1271 | char *actparm = *condition; |
1272 | struct agent_expr *cond; | |
1273 | ||
9f3a5c85 LM |
1274 | if (condition == NULL) |
1275 | return 1; | |
1276 | ||
d708bcd1 PA |
1277 | if (bp == NULL) |
1278 | return 0; | |
1279 | ||
9f3a5c85 LM |
1280 | cond = gdb_parse_agent_expr (&actparm); |
1281 | ||
1282 | if (cond == NULL) | |
1283 | { | |
1284 | fprintf (stderr, "Condition evaluation failed. " | |
1285 | "Assuming unconditional.\n"); | |
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | add_condition_to_breakpoint (bp, cond); | |
1290 | ||
1291 | *condition = actparm; | |
1292 | ||
d708bcd1 | 1293 | return 1; |
9f3a5c85 LM |
1294 | } |
1295 | ||
1296 | /* Evaluate condition (if any) at breakpoint BP. Return 1 if | |
1297 | true and 0 otherwise. */ | |
1298 | ||
802e8e6d PA |
1299 | static int |
1300 | gdb_condition_true_at_breakpoint_z_type (char z_type, CORE_ADDR addr) | |
8b07ae33 | 1301 | { |
9f3a5c85 | 1302 | /* Fetch registers for the current inferior. */ |
9aa76cd0 | 1303 | struct gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
9f3a5c85 LM |
1304 | ULONGEST value = 0; |
1305 | struct point_cond_list *cl; | |
1306 | int err = 0; | |
5ae4861a | 1307 | struct eval_agent_expr_context ctx; |
9f3a5c85 LM |
1308 | |
1309 | if (bp == NULL) | |
1310 | return 0; | |
8b07ae33 | 1311 | |
9f3a5c85 LM |
1312 | /* Check if the breakpoint is unconditional. If it is, |
1313 | the condition always evaluates to TRUE. */ | |
1314 | if (bp->cond_list == NULL) | |
1315 | return 1; | |
1316 | ||
0bfdf32f | 1317 | ctx.regcache = get_thread_regcache (current_thread, 1); |
5ae4861a YQ |
1318 | ctx.tframe = NULL; |
1319 | ctx.tpoint = NULL; | |
1320 | ||
9f3a5c85 LM |
1321 | /* Evaluate each condition in the breakpoint's list of conditions. |
1322 | Return true if any of the conditions evaluates to TRUE. | |
1323 | ||
1324 | If we failed to evaluate the expression, TRUE is returned. This | |
1325 | forces GDB to reevaluate the conditions. */ | |
1326 | for (cl = bp->cond_list; | |
1327 | cl && !value && !err; cl = cl->next) | |
1328 | { | |
1329 | /* Evaluate the condition. */ | |
5ae4861a | 1330 | err = gdb_eval_agent_expr (&ctx, cl->cond, &value); |
9f3a5c85 LM |
1331 | } |
1332 | ||
1333 | if (err) | |
1334 | return 1; | |
1335 | ||
1336 | return (value != 0); | |
1337 | } | |
1338 | ||
802e8e6d PA |
1339 | int |
1340 | gdb_condition_true_at_breakpoint (CORE_ADDR where) | |
1341 | { | |
1342 | /* Only check code (software or hardware) breakpoints. */ | |
1343 | return (gdb_condition_true_at_breakpoint_z_type (Z_PACKET_SW_BP, where) | |
1344 | || gdb_condition_true_at_breakpoint_z_type (Z_PACKET_HW_BP, where)); | |
1345 | } | |
1346 | ||
d3ce09f5 SS |
1347 | /* Add commands COMMANDS to GDBserver's breakpoint BP. */ |
1348 | ||
5b3da067 | 1349 | static void |
9aa76cd0 | 1350 | add_commands_to_breakpoint (struct gdb_breakpoint *bp, |
d3ce09f5 SS |
1351 | struct agent_expr *commands, int persist) |
1352 | { | |
1353 | struct point_command_list *new_cmd; | |
1354 | ||
1355 | /* Create new command. */ | |
8d749320 | 1356 | new_cmd = XCNEW (struct point_command_list); |
d3ce09f5 SS |
1357 | new_cmd->cmd = commands; |
1358 | new_cmd->persistence = persist; | |
1359 | ||
1360 | /* Add commands to the list. */ | |
1361 | new_cmd->next = bp->command_list; | |
1362 | bp->command_list = new_cmd; | |
1363 | } | |
1364 | ||
1365 | /* Add a target-side command COMMAND to the breakpoint at ADDR. */ | |
1366 | ||
1367 | int | |
9aa76cd0 | 1368 | add_breakpoint_commands (struct gdb_breakpoint *bp, char **command, |
802e8e6d | 1369 | int persist) |
d3ce09f5 | 1370 | { |
d3ce09f5 SS |
1371 | char *actparm = *command; |
1372 | struct agent_expr *cmd; | |
1373 | ||
d3ce09f5 SS |
1374 | if (command == NULL) |
1375 | return 1; | |
1376 | ||
d708bcd1 PA |
1377 | if (bp == NULL) |
1378 | return 0; | |
1379 | ||
d3ce09f5 SS |
1380 | cmd = gdb_parse_agent_expr (&actparm); |
1381 | ||
1382 | if (cmd == NULL) | |
1383 | { | |
1384 | fprintf (stderr, "Command evaluation failed. " | |
1385 | "Disabling.\n"); | |
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | add_commands_to_breakpoint (bp, cmd, persist); | |
1390 | ||
1391 | *command = actparm; | |
1392 | ||
d708bcd1 | 1393 | return 1; |
d3ce09f5 SS |
1394 | } |
1395 | ||
1396 | /* Return true if there are no commands to run at this location, | |
1397 | which likely means we want to report back to GDB. */ | |
802e8e6d PA |
1398 | |
1399 | static int | |
1400 | gdb_no_commands_at_breakpoint_z_type (char z_type, CORE_ADDR addr) | |
d3ce09f5 | 1401 | { |
9aa76cd0 | 1402 | struct gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
d3ce09f5 SS |
1403 | |
1404 | if (bp == NULL) | |
802e8e6d | 1405 | return 1; |
d3ce09f5 SS |
1406 | |
1407 | if (debug_threads) | |
802e8e6d PA |
1408 | debug_printf ("at 0x%s, type Z%c, bp command_list is 0x%s\n", |
1409 | paddress (addr), z_type, | |
87ce2a04 | 1410 | phex_nz ((uintptr_t) bp->command_list, 0)); |
d3ce09f5 SS |
1411 | return (bp->command_list == NULL); |
1412 | } | |
1413 | ||
802e8e6d PA |
1414 | /* Return true if there are no commands to run at this location, |
1415 | which likely means we want to report back to GDB. */ | |
1416 | ||
1417 | int | |
1418 | gdb_no_commands_at_breakpoint (CORE_ADDR where) | |
1419 | { | |
1420 | /* Only check code (software or hardware) breakpoints. */ | |
1421 | return (gdb_no_commands_at_breakpoint_z_type (Z_PACKET_SW_BP, where) | |
1422 | && gdb_no_commands_at_breakpoint_z_type (Z_PACKET_HW_BP, where)); | |
1423 | } | |
1424 | ||
1425 | /* Run a breakpoint's commands. Returns 0 if there was a problem | |
1426 | running any command, 1 otherwise. */ | |
1427 | ||
1428 | static int | |
1429 | run_breakpoint_commands_z_type (char z_type, CORE_ADDR addr) | |
d3ce09f5 SS |
1430 | { |
1431 | /* Fetch registers for the current inferior. */ | |
9aa76cd0 | 1432 | struct gdb_breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
d3ce09f5 SS |
1433 | ULONGEST value = 0; |
1434 | struct point_command_list *cl; | |
1435 | int err = 0; | |
5ae4861a | 1436 | struct eval_agent_expr_context ctx; |
d3ce09f5 SS |
1437 | |
1438 | if (bp == NULL) | |
802e8e6d | 1439 | return 1; |
d3ce09f5 | 1440 | |
0bfdf32f | 1441 | ctx.regcache = get_thread_regcache (current_thread, 1); |
5ae4861a YQ |
1442 | ctx.tframe = NULL; |
1443 | ctx.tpoint = NULL; | |
1444 | ||
d3ce09f5 SS |
1445 | for (cl = bp->command_list; |
1446 | cl && !value && !err; cl = cl->next) | |
1447 | { | |
1448 | /* Run the command. */ | |
5ae4861a | 1449 | err = gdb_eval_agent_expr (&ctx, cl->cmd, &value); |
d3ce09f5 SS |
1450 | |
1451 | /* If one command has a problem, stop digging the hole deeper. */ | |
1452 | if (err) | |
802e8e6d | 1453 | return 0; |
d3ce09f5 | 1454 | } |
802e8e6d PA |
1455 | |
1456 | return 1; | |
d3ce09f5 SS |
1457 | } |
1458 | ||
802e8e6d PA |
1459 | void |
1460 | run_breakpoint_commands (CORE_ADDR where) | |
1461 | { | |
1462 | /* Only check code (software or hardware) breakpoints. If one | |
1463 | command has a problem, stop digging the hole deeper. */ | |
1464 | if (run_breakpoint_commands_z_type (Z_PACKET_SW_BP, where)) | |
1465 | run_breakpoint_commands_z_type (Z_PACKET_HW_BP, where); | |
1466 | } | |
1467 | ||
1468 | /* See mem-break.h. */ | |
9f3a5c85 LM |
1469 | |
1470 | int | |
1471 | gdb_breakpoint_here (CORE_ADDR where) | |
1472 | { | |
802e8e6d PA |
1473 | /* Only check code (software or hardware) breakpoints. */ |
1474 | return (find_gdb_breakpoint (Z_PACKET_SW_BP, where, -1) != NULL | |
1475 | || find_gdb_breakpoint (Z_PACKET_HW_BP, where, -1) != NULL); | |
68070c10 PA |
1476 | } |
1477 | ||
d50171e4 PA |
1478 | void |
1479 | set_reinsert_breakpoint (CORE_ADDR stop_at) | |
611cb4a5 | 1480 | { |
414a389f PA |
1481 | struct breakpoint *bp; |
1482 | ||
811f8301 | 1483 | bp = set_breakpoint_type_at (reinsert_breakpoint, stop_at, NULL); |
611cb4a5 DJ |
1484 | } |
1485 | ||
1486 | void | |
d50171e4 | 1487 | delete_reinsert_breakpoints (void) |
611cb4a5 | 1488 | { |
d50171e4 PA |
1489 | struct process_info *proc = current_process (); |
1490 | struct breakpoint *bp, **bp_link; | |
611cb4a5 | 1491 | |
d50171e4 PA |
1492 | bp = proc->breakpoints; |
1493 | bp_link = &proc->breakpoints; | |
611cb4a5 | 1494 | |
d50171e4 PA |
1495 | while (bp) |
1496 | { | |
414a389f PA |
1497 | if (bp->type == reinsert_breakpoint) |
1498 | { | |
1499 | *bp_link = bp->next; | |
8b07ae33 | 1500 | release_breakpoint (proc, bp); |
414a389f PA |
1501 | bp = *bp_link; |
1502 | } | |
1503 | else | |
1504 | { | |
1505 | bp_link = &bp->next; | |
1506 | bp = *bp_link; | |
1507 | } | |
d50171e4 PA |
1508 | } |
1509 | } | |
b65d95c5 | 1510 | |
d50171e4 | 1511 | static void |
8b07ae33 | 1512 | uninsert_raw_breakpoint (struct raw_breakpoint *bp) |
d50171e4 | 1513 | { |
802e8e6d PA |
1514 | if (bp->inserted < 0) |
1515 | { | |
1516 | if (debug_threads) | |
1517 | debug_printf ("Breakpoint at %s is marked insert-disabled.\n", | |
1518 | paddress (bp->pc)); | |
1519 | } | |
1520 | else if (bp->inserted > 0) | |
d50171e4 PA |
1521 | { |
1522 | int err; | |
1523 | ||
1524 | bp->inserted = 0; | |
802e8e6d | 1525 | |
27165294 | 1526 | err = the_target->remove_point (bp->raw_type, bp->pc, bp->kind, bp); |
d50171e4 PA |
1527 | if (err != 0) |
1528 | { | |
1529 | bp->inserted = 1; | |
611cb4a5 | 1530 | |
d50171e4 | 1531 | if (debug_threads) |
802e8e6d PA |
1532 | debug_printf ("Failed to uninsert raw breakpoint at 0x%s.\n", |
1533 | paddress (bp->pc)); | |
d50171e4 PA |
1534 | } |
1535 | } | |
611cb4a5 DJ |
1536 | } |
1537 | ||
1538 | void | |
d50171e4 | 1539 | uninsert_breakpoints_at (CORE_ADDR pc) |
611cb4a5 | 1540 | { |
802e8e6d | 1541 | struct process_info *proc = current_process (); |
8b07ae33 | 1542 | struct raw_breakpoint *bp; |
802e8e6d | 1543 | int found = 0; |
611cb4a5 | 1544 | |
802e8e6d PA |
1545 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1546 | if ((bp->raw_type == raw_bkpt_type_sw | |
1547 | || bp->raw_type == raw_bkpt_type_hw) | |
1548 | && bp->pc == pc) | |
1549 | { | |
1550 | found = 1; | |
1551 | ||
1552 | if (bp->inserted) | |
1553 | uninsert_raw_breakpoint (bp); | |
1554 | } | |
1555 | ||
1556 | if (!found) | |
d50171e4 PA |
1557 | { |
1558 | /* This can happen when we remove all breakpoints while handling | |
1559 | a step-over. */ | |
1560 | if (debug_threads) | |
87ce2a04 DE |
1561 | debug_printf ("Could not find breakpoint at 0x%s " |
1562 | "in list (uninserting).\n", | |
1563 | paddress (pc)); | |
d50171e4 | 1564 | } |
611cb4a5 DJ |
1565 | } |
1566 | ||
0fb4aa4b PA |
1567 | void |
1568 | uninsert_all_breakpoints (void) | |
1569 | { | |
1570 | struct process_info *proc = current_process (); | |
1571 | struct raw_breakpoint *bp; | |
1572 | ||
1573 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
802e8e6d PA |
1574 | if ((bp->raw_type == raw_bkpt_type_sw |
1575 | || bp->raw_type == raw_bkpt_type_hw) | |
1576 | && bp->inserted) | |
0fb4aa4b PA |
1577 | uninsert_raw_breakpoint (bp); |
1578 | } | |
1579 | ||
2e7b624b YQ |
1580 | void |
1581 | uninsert_reinsert_breakpoints (void) | |
1582 | { | |
1583 | struct process_info *proc = current_process (); | |
1584 | struct breakpoint *bp; | |
1585 | ||
1586 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1587 | { | |
1588 | if (bp->type == reinsert_breakpoint) | |
1589 | { | |
1590 | gdb_assert (bp->raw->inserted > 0); | |
1591 | ||
1592 | /* Only uninsert the raw breakpoint if it only belongs to a | |
1593 | reinsert breakpoint. */ | |
1594 | if (bp->raw->refcount == 1) | |
1595 | uninsert_raw_breakpoint (bp->raw); | |
1596 | } | |
1597 | } | |
1598 | } | |
1599 | ||
d50171e4 | 1600 | static void |
8b07ae33 | 1601 | reinsert_raw_breakpoint (struct raw_breakpoint *bp) |
611cb4a5 | 1602 | { |
d50171e4 | 1603 | int err; |
611cb4a5 | 1604 | |
d50171e4 | 1605 | if (bp->inserted) |
85ba7d86 | 1606 | return; |
611cb4a5 | 1607 | |
27165294 | 1608 | err = the_target->insert_point (bp->raw_type, bp->pc, bp->kind, bp); |
d50171e4 PA |
1609 | if (err == 0) |
1610 | bp->inserted = 1; | |
1611 | else if (debug_threads) | |
802e8e6d PA |
1612 | debug_printf ("Failed to reinsert breakpoint at 0x%s (%d).\n", |
1613 | paddress (bp->pc), err); | |
611cb4a5 DJ |
1614 | } |
1615 | ||
d50171e4 PA |
1616 | void |
1617 | reinsert_breakpoints_at (CORE_ADDR pc) | |
611cb4a5 | 1618 | { |
802e8e6d | 1619 | struct process_info *proc = current_process (); |
8b07ae33 | 1620 | struct raw_breakpoint *bp; |
802e8e6d | 1621 | int found = 0; |
611cb4a5 | 1622 | |
802e8e6d PA |
1623 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1624 | if ((bp->raw_type == raw_bkpt_type_sw | |
1625 | || bp->raw_type == raw_bkpt_type_hw) | |
1626 | && bp->pc == pc) | |
1627 | { | |
1628 | found = 1; | |
1629 | ||
1630 | reinsert_raw_breakpoint (bp); | |
1631 | } | |
1632 | ||
1633 | if (!found) | |
611cb4a5 | 1634 | { |
d50171e4 PA |
1635 | /* This can happen when we remove all breakpoints while handling |
1636 | a step-over. */ | |
1637 | if (debug_threads) | |
87ce2a04 DE |
1638 | debug_printf ("Could not find raw breakpoint at 0x%s " |
1639 | "in list (reinserting).\n", | |
1640 | paddress (pc)); | |
611cb4a5 | 1641 | } |
d50171e4 PA |
1642 | } |
1643 | ||
f79b145d YQ |
1644 | int |
1645 | has_reinsert_breakpoints (struct process_info *proc) | |
1646 | { | |
1647 | struct breakpoint *bp, **bp_link; | |
1648 | ||
1649 | bp = proc->breakpoints; | |
1650 | bp_link = &proc->breakpoints; | |
1651 | ||
1652 | while (bp) | |
1653 | { | |
1654 | if (bp->type == reinsert_breakpoint) | |
1655 | return 1; | |
1656 | else | |
1657 | { | |
1658 | bp_link = &bp->next; | |
1659 | bp = *bp_link; | |
1660 | } | |
1661 | } | |
1662 | ||
1663 | return 0; | |
1664 | } | |
1665 | ||
0fb4aa4b PA |
1666 | void |
1667 | reinsert_all_breakpoints (void) | |
1668 | { | |
1669 | struct process_info *proc = current_process (); | |
1670 | struct raw_breakpoint *bp; | |
1671 | ||
1672 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
802e8e6d PA |
1673 | if ((bp->raw_type == raw_bkpt_type_sw |
1674 | || bp->raw_type == raw_bkpt_type_hw) | |
1675 | && !bp->inserted) | |
0fb4aa4b PA |
1676 | reinsert_raw_breakpoint (bp); |
1677 | } | |
1678 | ||
2e7b624b YQ |
1679 | void |
1680 | reinsert_reinsert_breakpoints (void) | |
1681 | { | |
1682 | struct process_info *proc = current_process (); | |
1683 | struct breakpoint *bp; | |
1684 | ||
1685 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1686 | { | |
1687 | if (bp->type == reinsert_breakpoint) | |
1688 | { | |
1689 | gdb_assert (bp->raw->inserted > 0); | |
1690 | ||
1691 | if (bp->raw->refcount == 1) | |
1692 | reinsert_raw_breakpoint (bp->raw); | |
1693 | } | |
1694 | } | |
1695 | } | |
1696 | ||
d50171e4 PA |
1697 | void |
1698 | check_breakpoints (CORE_ADDR stop_pc) | |
1699 | { | |
1700 | struct process_info *proc = current_process (); | |
1701 | struct breakpoint *bp, **bp_link; | |
1702 | ||
1703 | bp = proc->breakpoints; | |
1704 | bp_link = &proc->breakpoints; | |
1705 | ||
1706 | while (bp) | |
b65d95c5 | 1707 | { |
802e8e6d PA |
1708 | struct raw_breakpoint *raw = bp->raw; |
1709 | ||
1710 | if ((raw->raw_type == raw_bkpt_type_sw | |
1711 | || raw->raw_type == raw_bkpt_type_hw) | |
1712 | && raw->pc == stop_pc) | |
d50171e4 | 1713 | { |
802e8e6d | 1714 | if (!raw->inserted) |
d50171e4 PA |
1715 | { |
1716 | warning ("Hit a removed breakpoint?"); | |
1717 | return; | |
1718 | } | |
1719 | ||
9aa76cd0 | 1720 | if (bp->type == other_breakpoint) |
d50171e4 | 1721 | { |
9aa76cd0 YQ |
1722 | struct other_breakpoint *other_bp |
1723 | = (struct other_breakpoint *) bp; | |
1724 | ||
1725 | if (other_bp->handler != NULL && (*other_bp->handler) (stop_pc)) | |
1726 | { | |
1727 | *bp_link = bp->next; | |
d50171e4 | 1728 | |
9aa76cd0 | 1729 | release_breakpoint (proc, bp); |
d50171e4 | 1730 | |
9aa76cd0 YQ |
1731 | bp = *bp_link; |
1732 | continue; | |
1733 | } | |
d50171e4 PA |
1734 | } |
1735 | } | |
1736 | ||
1737 | bp_link = &bp->next; | |
1738 | bp = *bp_link; | |
b65d95c5 | 1739 | } |
611cb4a5 DJ |
1740 | } |
1741 | ||
d50171e4 PA |
1742 | int |
1743 | breakpoint_here (CORE_ADDR addr) | |
1744 | { | |
802e8e6d PA |
1745 | struct process_info *proc = current_process (); |
1746 | struct raw_breakpoint *bp; | |
1747 | ||
1748 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
1749 | if ((bp->raw_type == raw_bkpt_type_sw | |
1750 | || bp->raw_type == raw_bkpt_type_hw) | |
1751 | && bp->pc == addr) | |
1752 | return 1; | |
1753 | ||
1754 | return 0; | |
d50171e4 PA |
1755 | } |
1756 | ||
1757 | int | |
1758 | breakpoint_inserted_here (CORE_ADDR addr) | |
1759 | { | |
802e8e6d | 1760 | struct process_info *proc = current_process (); |
8b07ae33 | 1761 | struct raw_breakpoint *bp; |
d50171e4 | 1762 | |
802e8e6d PA |
1763 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1764 | if ((bp->raw_type == raw_bkpt_type_sw | |
1765 | || bp->raw_type == raw_bkpt_type_hw) | |
1766 | && bp->pc == addr | |
1767 | && bp->inserted) | |
1768 | return 1; | |
d50171e4 | 1769 | |
802e8e6d | 1770 | return 0; |
d50171e4 PA |
1771 | } |
1772 | ||
582511be PA |
1773 | /* See mem-break.h. */ |
1774 | ||
1775 | int | |
1776 | software_breakpoint_inserted_here (CORE_ADDR addr) | |
1777 | { | |
1778 | struct process_info *proc = current_process (); | |
1779 | struct raw_breakpoint *bp; | |
1780 | ||
1781 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
1782 | if (bp->raw_type == raw_bkpt_type_sw | |
1783 | && bp->pc == addr | |
1784 | && bp->inserted) | |
1785 | return 1; | |
1786 | ||
1787 | return 0; | |
1788 | } | |
1789 | ||
1790 | /* See mem-break.h. */ | |
1791 | ||
1792 | int | |
1793 | hardware_breakpoint_inserted_here (CORE_ADDR addr) | |
1794 | { | |
1795 | struct process_info *proc = current_process (); | |
1796 | struct raw_breakpoint *bp; | |
1797 | ||
1798 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
1799 | if (bp->raw_type == raw_bkpt_type_hw | |
1800 | && bp->pc == addr | |
1801 | && bp->inserted) | |
1802 | return 1; | |
1803 | ||
1804 | return 0; | |
1805 | } | |
1806 | ||
2d97cd35 AT |
1807 | /* See mem-break.h. */ |
1808 | ||
1809 | int | |
1810 | reinsert_breakpoint_inserted_here (CORE_ADDR addr) | |
1811 | { | |
1812 | struct process_info *proc = current_process (); | |
1813 | struct breakpoint *bp; | |
1814 | ||
1815 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1816 | if (bp->type == reinsert_breakpoint | |
1817 | && bp->raw->pc == addr | |
1818 | && bp->raw->inserted) | |
1819 | return 1; | |
1820 | ||
1821 | return 0; | |
1822 | } | |
1823 | ||
d3bbe7a0 PA |
1824 | static int |
1825 | validate_inserted_breakpoint (struct raw_breakpoint *bp) | |
1826 | { | |
1827 | unsigned char *buf; | |
1828 | int err; | |
1829 | ||
1830 | gdb_assert (bp->inserted); | |
802e8e6d | 1831 | gdb_assert (bp->raw_type == raw_bkpt_type_sw); |
d3bbe7a0 | 1832 | |
27165294 AT |
1833 | buf = (unsigned char *) alloca (bp_size (bp)); |
1834 | err = (*the_target->read_memory) (bp->pc, buf, bp_size (bp)); | |
1835 | if (err || memcmp (buf, bp_opcode (bp), bp_size (bp)) != 0) | |
d3bbe7a0 PA |
1836 | { |
1837 | /* Tag it as gone. */ | |
802e8e6d | 1838 | bp->inserted = -1; |
d3bbe7a0 PA |
1839 | return 0; |
1840 | } | |
1841 | ||
1842 | return 1; | |
1843 | } | |
1844 | ||
1845 | static void | |
1846 | delete_disabled_breakpoints (void) | |
1847 | { | |
1848 | struct process_info *proc = current_process (); | |
1849 | struct breakpoint *bp, *next; | |
1850 | ||
1851 | for (bp = proc->breakpoints; bp != NULL; bp = next) | |
1852 | { | |
1853 | next = bp->next; | |
802e8e6d | 1854 | if (bp->raw->inserted < 0) |
8376a3cb YQ |
1855 | { |
1856 | /* If reinsert_breakpoints become disabled, that means the | |
1857 | manipulations (insertion and removal) of them are wrong. */ | |
1858 | gdb_assert (bp->type != reinsert_breakpoint); | |
1859 | delete_breakpoint_1 (proc, bp); | |
1860 | } | |
d3bbe7a0 PA |
1861 | } |
1862 | } | |
1863 | ||
1864 | /* Check if breakpoints we inserted still appear to be inserted. They | |
1865 | may disappear due to a shared library unload, and worse, a new | |
1866 | shared library may be reloaded at the same address as the | |
1867 | previously unloaded one. If that happens, we should make sure that | |
1868 | the shadow memory of the old breakpoints isn't used when reading or | |
1869 | writing memory. */ | |
1870 | ||
1871 | void | |
1872 | validate_breakpoints (void) | |
1873 | { | |
1874 | struct process_info *proc = current_process (); | |
1875 | struct breakpoint *bp; | |
1876 | ||
1877 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1878 | { | |
802e8e6d PA |
1879 | struct raw_breakpoint *raw = bp->raw; |
1880 | ||
1881 | if (raw->raw_type == raw_bkpt_type_sw && raw->inserted > 0) | |
1882 | validate_inserted_breakpoint (raw); | |
d3bbe7a0 PA |
1883 | } |
1884 | ||
1885 | delete_disabled_breakpoints (); | |
1886 | } | |
1887 | ||
611cb4a5 | 1888 | void |
f450004a | 1889 | check_mem_read (CORE_ADDR mem_addr, unsigned char *buf, int mem_len) |
611cb4a5 | 1890 | { |
95954743 | 1891 | struct process_info *proc = current_process (); |
8b07ae33 | 1892 | struct raw_breakpoint *bp = proc->raw_breakpoints; |
fa593d66 | 1893 | struct fast_tracepoint_jump *jp = proc->fast_tracepoint_jumps; |
611cb4a5 | 1894 | CORE_ADDR mem_end = mem_addr + mem_len; |
d3bbe7a0 | 1895 | int disabled_one = 0; |
611cb4a5 | 1896 | |
fa593d66 PA |
1897 | for (; jp != NULL; jp = jp->next) |
1898 | { | |
1899 | CORE_ADDR bp_end = jp->pc + jp->length; | |
1900 | CORE_ADDR start, end; | |
1901 | int copy_offset, copy_len, buf_offset; | |
1902 | ||
6bf36717 JK |
1903 | gdb_assert (fast_tracepoint_jump_shadow (jp) >= buf + mem_len |
1904 | || buf >= fast_tracepoint_jump_shadow (jp) + (jp)->length); | |
1905 | ||
fa593d66 PA |
1906 | if (mem_addr >= bp_end) |
1907 | continue; | |
1908 | if (jp->pc >= mem_end) | |
1909 | continue; | |
1910 | ||
1911 | start = jp->pc; | |
1912 | if (mem_addr > start) | |
1913 | start = mem_addr; | |
1914 | ||
1915 | end = bp_end; | |
1916 | if (end > mem_end) | |
1917 | end = mem_end; | |
1918 | ||
1919 | copy_len = end - start; | |
1920 | copy_offset = start - jp->pc; | |
1921 | buf_offset = start - mem_addr; | |
1922 | ||
1923 | if (jp->inserted) | |
1924 | memcpy (buf + buf_offset, | |
1925 | fast_tracepoint_jump_shadow (jp) + copy_offset, | |
1926 | copy_len); | |
1927 | } | |
1928 | ||
611cb4a5 DJ |
1929 | for (; bp != NULL; bp = bp->next) |
1930 | { | |
27165294 | 1931 | CORE_ADDR bp_end = bp->pc + bp_size (bp); |
611cb4a5 DJ |
1932 | CORE_ADDR start, end; |
1933 | int copy_offset, copy_len, buf_offset; | |
1934 | ||
802e8e6d PA |
1935 | if (bp->raw_type != raw_bkpt_type_sw) |
1936 | continue; | |
1937 | ||
6bf36717 JK |
1938 | gdb_assert (bp->old_data >= buf + mem_len |
1939 | || buf >= &bp->old_data[sizeof (bp->old_data)]); | |
1940 | ||
611cb4a5 DJ |
1941 | if (mem_addr >= bp_end) |
1942 | continue; | |
1943 | if (bp->pc >= mem_end) | |
1944 | continue; | |
1945 | ||
1946 | start = bp->pc; | |
1947 | if (mem_addr > start) | |
1948 | start = mem_addr; | |
1949 | ||
1950 | end = bp_end; | |
1951 | if (end > mem_end) | |
1952 | end = mem_end; | |
1953 | ||
1954 | copy_len = end - start; | |
1955 | copy_offset = start - bp->pc; | |
1956 | buf_offset = start - mem_addr; | |
1957 | ||
802e8e6d | 1958 | if (bp->inserted > 0) |
d3bbe7a0 PA |
1959 | { |
1960 | if (validate_inserted_breakpoint (bp)) | |
1961 | memcpy (buf + buf_offset, bp->old_data + copy_offset, copy_len); | |
1962 | else | |
1963 | disabled_one = 1; | |
1964 | } | |
611cb4a5 | 1965 | } |
d3bbe7a0 PA |
1966 | |
1967 | if (disabled_one) | |
1968 | delete_disabled_breakpoints (); | |
611cb4a5 DJ |
1969 | } |
1970 | ||
1971 | void | |
b9fd1791 PA |
1972 | check_mem_write (CORE_ADDR mem_addr, unsigned char *buf, |
1973 | const unsigned char *myaddr, int mem_len) | |
611cb4a5 | 1974 | { |
95954743 | 1975 | struct process_info *proc = current_process (); |
8b07ae33 | 1976 | struct raw_breakpoint *bp = proc->raw_breakpoints; |
fa593d66 | 1977 | struct fast_tracepoint_jump *jp = proc->fast_tracepoint_jumps; |
611cb4a5 | 1978 | CORE_ADDR mem_end = mem_addr + mem_len; |
d3bbe7a0 | 1979 | int disabled_one = 0; |
611cb4a5 | 1980 | |
fa593d66 PA |
1981 | /* First fast tracepoint jumps, then breakpoint traps on top. */ |
1982 | ||
1983 | for (; jp != NULL; jp = jp->next) | |
1984 | { | |
1985 | CORE_ADDR jp_end = jp->pc + jp->length; | |
1986 | CORE_ADDR start, end; | |
1987 | int copy_offset, copy_len, buf_offset; | |
1988 | ||
6bf36717 JK |
1989 | gdb_assert (fast_tracepoint_jump_shadow (jp) >= myaddr + mem_len |
1990 | || myaddr >= fast_tracepoint_jump_shadow (jp) + (jp)->length); | |
1991 | gdb_assert (fast_tracepoint_jump_insn (jp) >= buf + mem_len | |
1992 | || buf >= fast_tracepoint_jump_insn (jp) + (jp)->length); | |
1993 | ||
fa593d66 PA |
1994 | if (mem_addr >= jp_end) |
1995 | continue; | |
1996 | if (jp->pc >= mem_end) | |
1997 | continue; | |
1998 | ||
1999 | start = jp->pc; | |
2000 | if (mem_addr > start) | |
2001 | start = mem_addr; | |
2002 | ||
2003 | end = jp_end; | |
2004 | if (end > mem_end) | |
2005 | end = mem_end; | |
2006 | ||
2007 | copy_len = end - start; | |
2008 | copy_offset = start - jp->pc; | |
2009 | buf_offset = start - mem_addr; | |
2010 | ||
2011 | memcpy (fast_tracepoint_jump_shadow (jp) + copy_offset, | |
b9fd1791 | 2012 | myaddr + buf_offset, copy_len); |
fa593d66 PA |
2013 | if (jp->inserted) |
2014 | memcpy (buf + buf_offset, | |
2015 | fast_tracepoint_jump_insn (jp) + copy_offset, copy_len); | |
2016 | } | |
2017 | ||
611cb4a5 DJ |
2018 | for (; bp != NULL; bp = bp->next) |
2019 | { | |
27165294 | 2020 | CORE_ADDR bp_end = bp->pc + bp_size (bp); |
611cb4a5 DJ |
2021 | CORE_ADDR start, end; |
2022 | int copy_offset, copy_len, buf_offset; | |
2023 | ||
802e8e6d PA |
2024 | if (bp->raw_type != raw_bkpt_type_sw) |
2025 | continue; | |
2026 | ||
6bf36717 JK |
2027 | gdb_assert (bp->old_data >= myaddr + mem_len |
2028 | || myaddr >= &bp->old_data[sizeof (bp->old_data)]); | |
2029 | ||
611cb4a5 DJ |
2030 | if (mem_addr >= bp_end) |
2031 | continue; | |
2032 | if (bp->pc >= mem_end) | |
2033 | continue; | |
2034 | ||
2035 | start = bp->pc; | |
2036 | if (mem_addr > start) | |
2037 | start = mem_addr; | |
2038 | ||
2039 | end = bp_end; | |
2040 | if (end > mem_end) | |
2041 | end = mem_end; | |
2042 | ||
2043 | copy_len = end - start; | |
2044 | copy_offset = start - bp->pc; | |
2045 | buf_offset = start - mem_addr; | |
2046 | ||
b9fd1791 | 2047 | memcpy (bp->old_data + copy_offset, myaddr + buf_offset, copy_len); |
802e8e6d | 2048 | if (bp->inserted > 0) |
d3bbe7a0 PA |
2049 | { |
2050 | if (validate_inserted_breakpoint (bp)) | |
27165294 | 2051 | memcpy (buf + buf_offset, bp_opcode (bp) + copy_offset, copy_len); |
d3bbe7a0 PA |
2052 | else |
2053 | disabled_one = 1; | |
2054 | } | |
611cb4a5 | 2055 | } |
d3bbe7a0 PA |
2056 | |
2057 | if (disabled_one) | |
2058 | delete_disabled_breakpoints (); | |
611cb4a5 | 2059 | } |
ae13219e | 2060 | |
95954743 | 2061 | /* Delete all breakpoints, and un-insert them from the inferior. */ |
ae13219e DJ |
2062 | |
2063 | void | |
2064 | delete_all_breakpoints (void) | |
2065 | { | |
95954743 PA |
2066 | struct process_info *proc = current_process (); |
2067 | ||
2068 | while (proc->breakpoints) | |
8b07ae33 | 2069 | delete_breakpoint_1 (proc, proc->breakpoints); |
95954743 PA |
2070 | } |
2071 | ||
f9e39928 | 2072 | /* Clear the "inserted" flag in all breakpoints. */ |
95954743 PA |
2073 | |
2074 | void | |
f9e39928 | 2075 | mark_breakpoints_out (struct process_info *proc) |
95954743 | 2076 | { |
8b07ae33 | 2077 | struct raw_breakpoint *raw_bp; |
95954743 | 2078 | |
8b07ae33 PA |
2079 | for (raw_bp = proc->raw_breakpoints; raw_bp != NULL; raw_bp = raw_bp->next) |
2080 | raw_bp->inserted = 0; | |
f9e39928 PA |
2081 | } |
2082 | ||
2083 | /* Release all breakpoints, but do not try to un-insert them from the | |
2084 | inferior. */ | |
2085 | ||
2086 | void | |
2087 | free_all_breakpoints (struct process_info *proc) | |
2088 | { | |
2089 | mark_breakpoints_out (proc); | |
8b07ae33 PA |
2090 | |
2091 | /* Note: use PROC explicitly instead of deferring to | |
2092 | delete_all_breakpoints --- CURRENT_INFERIOR may already have been | |
2093 | released when we get here. There should be no call to | |
2094 | current_process from here on. */ | |
95954743 | 2095 | while (proc->breakpoints) |
8b07ae33 | 2096 | delete_breakpoint_1 (proc, proc->breakpoints); |
ae13219e | 2097 | } |
ddcbc397 DB |
2098 | |
2099 | /* Clone an agent expression. */ | |
2100 | ||
2101 | static struct agent_expr * | |
2102 | clone_agent_expr (const struct agent_expr *src_ax) | |
2103 | { | |
2104 | struct agent_expr *ax; | |
2105 | ||
8d749320 | 2106 | ax = XCNEW (struct agent_expr); |
ddcbc397 | 2107 | ax->length = src_ax->length; |
224c3ddb | 2108 | ax->bytes = (unsigned char *) xcalloc (ax->length, 1); |
ddcbc397 DB |
2109 | memcpy (ax->bytes, src_ax->bytes, ax->length); |
2110 | return ax; | |
2111 | } | |
2112 | ||
2113 | /* Deep-copy the contents of one breakpoint to another. */ | |
2114 | ||
2115 | static struct breakpoint * | |
2116 | clone_one_breakpoint (const struct breakpoint *src) | |
2117 | { | |
2118 | struct breakpoint *dest; | |
2119 | struct raw_breakpoint *dest_raw; | |
ddcbc397 DB |
2120 | |
2121 | /* Clone the raw breakpoint. */ | |
8d749320 | 2122 | dest_raw = XCNEW (struct raw_breakpoint); |
ddcbc397 DB |
2123 | dest_raw->raw_type = src->raw->raw_type; |
2124 | dest_raw->refcount = src->raw->refcount; | |
2125 | dest_raw->pc = src->raw->pc; | |
27165294 | 2126 | dest_raw->kind = src->raw->kind; |
ddcbc397 DB |
2127 | memcpy (dest_raw->old_data, src->raw->old_data, MAX_BREAKPOINT_LEN); |
2128 | dest_raw->inserted = src->raw->inserted; | |
2129 | ||
2130 | /* Clone the high-level breakpoint. */ | |
9aa76cd0 | 2131 | if (is_gdb_breakpoint (src->type)) |
ddcbc397 | 2132 | { |
9aa76cd0 YQ |
2133 | struct gdb_breakpoint *gdb_dest = XCNEW (struct gdb_breakpoint); |
2134 | struct point_cond_list *current_cond; | |
2135 | struct point_cond_list *new_cond; | |
2136 | struct point_cond_list *cond_tail = NULL; | |
2137 | struct point_command_list *current_cmd; | |
2138 | struct point_command_list *new_cmd; | |
2139 | struct point_command_list *cmd_tail = NULL; | |
2140 | ||
2141 | /* Clone the condition list. */ | |
2142 | for (current_cond = ((struct gdb_breakpoint *) src)->cond_list; | |
2143 | current_cond != NULL; | |
2144 | current_cond = current_cond->next) | |
2145 | { | |
2146 | new_cond = XCNEW (struct point_cond_list); | |
2147 | new_cond->cond = clone_agent_expr (current_cond->cond); | |
2148 | APPEND_TO_LIST (&gdb_dest->cond_list, new_cond, cond_tail); | |
2149 | } | |
2150 | ||
2151 | /* Clone the command list. */ | |
2152 | for (current_cmd = ((struct gdb_breakpoint *) src)->command_list; | |
2153 | current_cmd != NULL; | |
2154 | current_cmd = current_cmd->next) | |
2155 | { | |
2156 | new_cmd = XCNEW (struct point_command_list); | |
2157 | new_cmd->cmd = clone_agent_expr (current_cmd->cmd); | |
2158 | new_cmd->persistence = current_cmd->persistence; | |
2159 | APPEND_TO_LIST (&gdb_dest->command_list, new_cmd, cmd_tail); | |
2160 | } | |
2161 | ||
2162 | dest = (struct breakpoint *) gdb_dest; | |
ddcbc397 | 2163 | } |
9aa76cd0 YQ |
2164 | else if (src->type == other_breakpoint) |
2165 | { | |
2166 | struct other_breakpoint *other_dest = XCNEW (struct other_breakpoint); | |
ddcbc397 | 2167 | |
9aa76cd0 YQ |
2168 | other_dest->handler = ((struct other_breakpoint *) src)->handler; |
2169 | dest = (struct breakpoint *) other_dest; | |
2170 | } | |
2171 | else if (src->type == reinsert_breakpoint) | |
ddcbc397 | 2172 | { |
9aa76cd0 YQ |
2173 | struct reinsert_breakpoint *reinsert_dest |
2174 | = XCNEW (struct reinsert_breakpoint); | |
2175 | ||
2176 | dest = (struct breakpoint *) reinsert_dest; | |
ddcbc397 | 2177 | } |
9aa76cd0 YQ |
2178 | else |
2179 | gdb_assert_not_reached ("unhandled breakpoint type"); | |
2180 | ||
2181 | dest->type = src->type; | |
2182 | dest->raw = dest_raw; | |
ddcbc397 DB |
2183 | |
2184 | return dest; | |
2185 | } | |
2186 | ||
2187 | /* Create a new breakpoint list NEW_LIST that is a copy of the | |
2188 | list starting at SRC_LIST. Create the corresponding new | |
2189 | raw_breakpoint list NEW_RAW_LIST as well. */ | |
2190 | ||
2191 | void | |
2192 | clone_all_breakpoints (struct breakpoint **new_list, | |
2193 | struct raw_breakpoint **new_raw_list, | |
2194 | const struct breakpoint *src_list) | |
2195 | { | |
2196 | const struct breakpoint *bp; | |
2197 | struct breakpoint *new_bkpt; | |
2198 | struct breakpoint *bkpt_tail = NULL; | |
2199 | struct raw_breakpoint *raw_bkpt_tail = NULL; | |
2200 | ||
2201 | for (bp = src_list; bp != NULL; bp = bp->next) | |
2202 | { | |
2203 | new_bkpt = clone_one_breakpoint (bp); | |
2204 | APPEND_TO_LIST (new_list, new_bkpt, bkpt_tail); | |
2205 | APPEND_TO_LIST (new_raw_list, new_bkpt->raw, raw_bkpt_tail); | |
2206 | } | |
2207 | } |