1 /* Memory breakpoint operations for the remote server for GDB.
2 Copyright (C) 2002-2016 Free Software Foundation, Inc.
4 Contributed by MontaVista Software.
6 This file is part of GDB.
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
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #define MAX_BREAKPOINT_LEN 8
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
34 #define APPEND_TO_LIST(listpp, itemp, tailp) \
37 if ((tailp) == NULL) \
38 *(listpp) = (itemp); \
40 (tailp)->next = (itemp); \
45 /* GDB will never try to install multiple breakpoints at the same
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
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.
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.
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.
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
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
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
84 /* The low level, physical, raw breakpoint. */
87 struct raw_breakpoint
*next
;
89 /* The low level type of the breakpoint (software breakpoint,
91 enum raw_bkpt_type raw_type
;
93 /* A reference count. Each high level breakpoint referencing this
94 raw breakpoint accounts for one reference. */
97 /* The breakpoint's insertion address. There can only be one raw
98 breakpoint for a given PC. */
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. */
109 /* The breakpoint's shadow memory. */
110 unsigned char old_data
[MAX_BREAKPOINT_LEN
];
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. */
118 /* The type of a breakpoint. */
121 /* A GDB breakpoint, requested with a Z0 packet. */
124 /* A GDB hardware breakpoint, requested with a Z1 packet. */
127 /* A GDB write watchpoint, requested with a Z2 packet. */
130 /* A GDB read watchpoint, requested with a Z3 packet. */
133 /* A GDB access watchpoint, requested with a Z4 packet. */
136 /* A basic-software-single-step breakpoint. */
139 /* Any other breakpoint type that doesn't require specific
140 treatment goes here. E.g., an event breakpoint. */
144 struct point_cond_list
146 /* Pointer to the agent expression that is the breakpoint's
148 struct agent_expr
*cond
;
150 /* Pointer to the next condition. */
151 struct point_cond_list
*next
;
154 struct point_command_list
156 /* Pointer to the agent expression that is the breakpoint's
158 struct agent_expr
*cmd
;
160 /* Flag that is true if this command should run even while GDB is
164 /* Pointer to the next command. */
165 struct point_command_list
*next
;
168 /* A high level (in gdbserver's perspective) breakpoint. */
171 struct breakpoint
*next
;
173 /* The breakpoint's type. */
176 /* Pointer to the condition list that should be evaluated on
177 the target or NULL if the breakpoint is unconditional or
178 if GDB doesn't want us to evaluate the conditionals on the
180 struct point_cond_list
*cond_list
;
182 /* Point to the list of commands to run when this is hit. */
183 struct point_command_list
*command_list
;
185 /* Link to this breakpoint's raw breakpoint. This is always
187 struct raw_breakpoint
*raw
;
189 /* Function to call when we hit this breakpoint. If it returns 1,
190 the breakpoint shall be deleted; 0 or if this callback is NULL,
191 it will be left inserted. */
192 int (*handler
) (CORE_ADDR
);
195 /* Return the breakpoint size from its kind. */
198 bp_size (struct raw_breakpoint
*bp
)
202 the_target
->sw_breakpoint_from_kind (bp
->kind
, &size
);
206 /* Return the breakpoint opcode from its kind. */
208 static const gdb_byte
*
209 bp_opcode (struct raw_breakpoint
*bp
)
213 return the_target
->sw_breakpoint_from_kind (bp
->kind
, &size
);
216 /* See mem-break.h. */
218 enum target_hw_bp_type
219 raw_bkpt_type_to_target_hw_bp_type (enum raw_bkpt_type raw_type
)
223 case raw_bkpt_type_hw
:
225 case raw_bkpt_type_write_wp
:
227 case raw_bkpt_type_read_wp
:
229 case raw_bkpt_type_access_wp
:
232 internal_error (__FILE__
, __LINE__
,
233 "bad raw breakpoint type %d", (int) raw_type
);
237 /* See mem-break.h. */
239 static enum bkpt_type
240 Z_packet_to_bkpt_type (char z_type
)
242 gdb_assert ('0' <= z_type
&& z_type
<= '4');
244 return (enum bkpt_type
) (gdb_breakpoint_Z0
+ (z_type
- '0'));
247 /* See mem-break.h. */
250 Z_packet_to_raw_bkpt_type (char z_type
)
255 return raw_bkpt_type_sw
;
257 return raw_bkpt_type_hw
;
258 case Z_PACKET_WRITE_WP
:
259 return raw_bkpt_type_write_wp
;
260 case Z_PACKET_READ_WP
:
261 return raw_bkpt_type_read_wp
;
262 case Z_PACKET_ACCESS_WP
:
263 return raw_bkpt_type_access_wp
;
265 gdb_assert_not_reached ("unhandled Z packet type.");
270 any_persistent_commands (void)
272 struct process_info
*proc
= current_process ();
273 struct breakpoint
*bp
;
274 struct point_command_list
*cl
;
276 for (bp
= proc
->breakpoints
; bp
!= NULL
; bp
= bp
->next
)
278 for (cl
= bp
->command_list
; cl
!= NULL
; cl
= cl
->next
)
286 /* Find low-level breakpoint of type TYPE at address ADDR that is not
287 insert-disabled. Returns NULL if not found. */
289 static struct raw_breakpoint
*
290 find_enabled_raw_code_breakpoint_at (CORE_ADDR addr
, enum raw_bkpt_type type
)
292 struct process_info
*proc
= current_process ();
293 struct raw_breakpoint
*bp
;
295 for (bp
= proc
->raw_breakpoints
; bp
!= NULL
; bp
= bp
->next
)
297 && bp
->raw_type
== type
298 && bp
->inserted
>= 0)
304 /* Find low-level breakpoint of type TYPE at address ADDR. Returns
305 NULL if not found. */
307 static struct raw_breakpoint
*
308 find_raw_breakpoint_at (CORE_ADDR addr
, enum raw_bkpt_type type
, int kind
)
310 struct process_info
*proc
= current_process ();
311 struct raw_breakpoint
*bp
;
313 for (bp
= proc
->raw_breakpoints
; bp
!= NULL
; bp
= bp
->next
)
314 if (bp
->pc
== addr
&& bp
->raw_type
== type
&& bp
->kind
== kind
)
320 /* See mem-break.h. */
323 insert_memory_breakpoint (struct raw_breakpoint
*bp
)
325 unsigned char buf
[MAX_BREAKPOINT_LEN
];
328 /* Note that there can be fast tracepoint jumps installed in the
329 same memory range, so to get at the original memory, we need to
330 use read_inferior_memory, which masks those out. */
331 err
= read_inferior_memory (bp
->pc
, buf
, bp_size (bp
));
335 debug_printf ("Failed to read shadow memory of"
336 " breakpoint at 0x%s (%s).\n",
337 paddress (bp
->pc
), strerror (err
));
341 memcpy (bp
->old_data
, buf
, bp_size (bp
));
343 err
= (*the_target
->write_memory
) (bp
->pc
, bp_opcode (bp
),
348 debug_printf ("Failed to insert breakpoint at 0x%s (%s).\n",
349 paddress (bp
->pc
), strerror (err
));
352 return err
!= 0 ? -1 : 0;
355 /* See mem-break.h */
358 remove_memory_breakpoint (struct raw_breakpoint
*bp
)
360 unsigned char buf
[MAX_BREAKPOINT_LEN
];
363 /* Since there can be trap breakpoints inserted in the same address
364 range, we use `write_inferior_memory', which takes care of
365 layering breakpoints on top of fast tracepoints, and on top of
366 the buffer we pass it. This works because the caller has already
367 either unlinked the breakpoint or marked it uninserted. Also
368 note that we need to pass the current shadow contents, because
369 write_inferior_memory updates any shadow memory with what we pass
370 here, and we want that to be a nop. */
371 memcpy (buf
, bp
->old_data
, bp_size (bp
));
372 err
= write_inferior_memory (bp
->pc
, buf
, bp_size (bp
));
376 debug_printf ("Failed to uninsert raw breakpoint "
377 "at 0x%s (%s) while deleting it.\n",
378 paddress (bp
->pc
), strerror (err
));
380 return err
!= 0 ? -1 : 0;
383 /* Set a RAW breakpoint of type TYPE and kind KIND at WHERE. On
384 success, a pointer to the new breakpoint is returned. On failure,
385 returns NULL and writes the error code to *ERR. */
387 static struct raw_breakpoint
*
388 set_raw_breakpoint_at (enum raw_bkpt_type type
, CORE_ADDR where
, int kind
,
391 struct process_info
*proc
= current_process ();
392 struct raw_breakpoint
*bp
;
393 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
395 if (type
== raw_bkpt_type_sw
|| type
== raw_bkpt_type_hw
)
397 bp
= find_enabled_raw_code_breakpoint_at (where
, type
);
398 if (bp
!= NULL
&& bp
->kind
!= kind
)
400 /* A different kind than previously seen. The previous
401 breakpoint must be gone then. */
403 debug_printf ("Inconsistent breakpoint kind? Was %d, now %d.\n",
410 bp
= find_raw_breakpoint_at (where
, type
, kind
);
414 bp
= XCNEW (struct raw_breakpoint
);
418 make_cleanup (xfree
, bp
);
423 *err
= the_target
->insert_point (bp
->raw_type
, bp
->pc
, bp
->kind
, bp
);
427 debug_printf ("Failed to insert breakpoint at 0x%s (%d).\n",
428 paddress (where
), *err
);
430 do_cleanups (old_chain
);
437 discard_cleanups (old_chain
);
439 /* Link the breakpoint in, if this is the first reference. */
440 if (++bp
->refcount
== 1)
442 bp
->next
= proc
->raw_breakpoints
;
443 proc
->raw_breakpoints
= bp
;
448 /* Notice that breakpoint traps are always installed on top of fast
449 tracepoint jumps. This is even if the fast tracepoint is installed
450 at a later time compared to when the breakpoint was installed.
451 This means that a stopping breakpoint or tracepoint has higher
452 "priority". In turn, this allows having fast and slow tracepoints
453 (and breakpoints) at the same address behave correctly. */
456 /* A fast tracepoint jump. */
458 struct fast_tracepoint_jump
460 struct fast_tracepoint_jump
*next
;
462 /* A reference count. GDB can install more than one fast tracepoint
463 at the same address (each with its own action list, for
467 /* The fast tracepoint's insertion address. There can only be one
468 of these for a given PC. */
471 /* Non-zero if this fast tracepoint jump is currently inserted in
475 /* The length of the jump instruction. */
478 /* A poor-man's flexible array member, holding both the jump
479 instruction to insert, and a copy of the instruction that would
480 be in memory had not been a jump there (the shadow memory of the
482 unsigned char insn_and_shadow
[0];
485 /* Fast tracepoint FP's jump instruction to insert. */
486 #define fast_tracepoint_jump_insn(fp) \
487 ((fp)->insn_and_shadow + 0)
489 /* The shadow memory of fast tracepoint jump FP. */
490 #define fast_tracepoint_jump_shadow(fp) \
491 ((fp)->insn_and_shadow + (fp)->length)
494 /* Return the fast tracepoint jump set at WHERE. */
496 static struct fast_tracepoint_jump
*
497 find_fast_tracepoint_jump_at (CORE_ADDR where
)
499 struct process_info
*proc
= current_process ();
500 struct fast_tracepoint_jump
*jp
;
502 for (jp
= proc
->fast_tracepoint_jumps
; jp
!= NULL
; jp
= jp
->next
)
510 fast_tracepoint_jump_here (CORE_ADDR where
)
512 struct fast_tracepoint_jump
*jp
= find_fast_tracepoint_jump_at (where
);
518 delete_fast_tracepoint_jump (struct fast_tracepoint_jump
*todel
)
520 struct fast_tracepoint_jump
*bp
, **bp_link
;
522 struct process_info
*proc
= current_process ();
524 bp
= proc
->fast_tracepoint_jumps
;
525 bp_link
= &proc
->fast_tracepoint_jumps
;
531 if (--bp
->refcount
== 0)
533 struct fast_tracepoint_jump
*prev_bp_link
= *bp_link
;
539 /* Since there can be breakpoints inserted in the same
540 address range, we use `write_inferior_memory', which
541 takes care of layering breakpoints on top of fast
542 tracepoints, and on top of the buffer we pass it.
543 This works because we've already unlinked the fast
544 tracepoint jump above. Also note that we need to
545 pass the current shadow contents, because
546 write_inferior_memory updates any shadow memory with
547 what we pass here, and we want that to be a nop. */
548 buf
= (unsigned char *) alloca (bp
->length
);
549 memcpy (buf
, fast_tracepoint_jump_shadow (bp
), bp
->length
);
550 ret
= write_inferior_memory (bp
->pc
, buf
, bp
->length
);
553 /* Something went wrong, relink the jump. */
554 *bp_link
= prev_bp_link
;
557 debug_printf ("Failed to uninsert fast tracepoint jump "
558 "at 0x%s (%s) while deleting it.\n",
559 paddress (bp
->pc
), strerror (ret
));
575 warning ("Could not find fast tracepoint jump in list.");
580 inc_ref_fast_tracepoint_jump (struct fast_tracepoint_jump
*jp
)
585 struct fast_tracepoint_jump
*
586 set_fast_tracepoint_jump (CORE_ADDR where
,
587 unsigned char *insn
, ULONGEST length
)
589 struct process_info
*proc
= current_process ();
590 struct fast_tracepoint_jump
*jp
;
594 /* We refcount fast tracepoint jumps. Check if we already know
595 about a jump at this address. */
596 jp
= find_fast_tracepoint_jump_at (where
);
603 /* We don't, so create a new object. Double the length, because the
604 flexible array member holds both the jump insn, and the
606 jp
= (struct fast_tracepoint_jump
*) xcalloc (1, sizeof (*jp
) + (length
* 2));
609 memcpy (fast_tracepoint_jump_insn (jp
), insn
, length
);
611 buf
= (unsigned char *) alloca (length
);
613 /* Note that there can be trap breakpoints inserted in the same
614 address range. To access the original memory contents, we use
615 `read_inferior_memory', which masks out breakpoints. */
616 err
= read_inferior_memory (where
, buf
, length
);
620 debug_printf ("Failed to read shadow memory of"
621 " fast tracepoint at 0x%s (%s).\n",
622 paddress (where
), strerror (err
));
626 memcpy (fast_tracepoint_jump_shadow (jp
), buf
, length
);
628 /* Link the jump in. */
630 jp
->next
= proc
->fast_tracepoint_jumps
;
631 proc
->fast_tracepoint_jumps
= jp
;
633 /* Since there can be trap breakpoints inserted in the same address
634 range, we use use `write_inferior_memory', which takes care of
635 layering breakpoints on top of fast tracepoints, on top of the
636 buffer we pass it. This works because we've already linked in
637 the fast tracepoint jump above. Also note that we need to pass
638 the current shadow contents, because write_inferior_memory
639 updates any shadow memory with what we pass here, and we want
641 err
= write_inferior_memory (where
, buf
, length
);
645 debug_printf ("Failed to insert fast tracepoint jump at 0x%s (%s).\n",
646 paddress (where
), strerror (err
));
649 proc
->fast_tracepoint_jumps
= jp
->next
;
659 uninsert_fast_tracepoint_jumps_at (CORE_ADDR pc
)
661 struct fast_tracepoint_jump
*jp
;
664 jp
= find_fast_tracepoint_jump_at (pc
);
667 /* This can happen when we remove all breakpoints while handling
670 debug_printf ("Could not find fast tracepoint jump at 0x%s "
671 "in list (uninserting).\n",
682 /* Since there can be trap breakpoints inserted in the same
683 address range, we use use `write_inferior_memory', which
684 takes care of layering breakpoints on top of fast
685 tracepoints, and on top of the buffer we pass it. This works
686 because we've already marked the fast tracepoint fast
687 tracepoint jump uninserted above. Also note that we need to
688 pass the current shadow contents, because
689 write_inferior_memory updates any shadow memory with what we
690 pass here, and we want that to be a nop. */
691 buf
= (unsigned char *) alloca (jp
->length
);
692 memcpy (buf
, fast_tracepoint_jump_shadow (jp
), jp
->length
);
693 err
= write_inferior_memory (jp
->pc
, buf
, jp
->length
);
699 debug_printf ("Failed to uninsert fast tracepoint jump at"
701 paddress (pc
), strerror (err
));
707 reinsert_fast_tracepoint_jumps_at (CORE_ADDR where
)
709 struct fast_tracepoint_jump
*jp
;
713 jp
= find_fast_tracepoint_jump_at (where
);
716 /* This can happen when we remove breakpoints when a tracepoint
717 hit causes a tracing stop, while handling a step-over. */
719 debug_printf ("Could not find fast tracepoint jump at 0x%s "
720 "in list (reinserting).\n",
726 error ("Jump already inserted at reinsert time.");
730 /* Since there can be trap breakpoints inserted in the same address
731 range, we use `write_inferior_memory', which takes care of
732 layering breakpoints on top of fast tracepoints, and on top of
733 the buffer we pass it. This works because we've already marked
734 the fast tracepoint jump inserted above. Also note that we need
735 to pass the current shadow contents, because
736 write_inferior_memory updates any shadow memory with what we pass
737 here, and we want that to be a nop. */
738 buf
= (unsigned char *) alloca (jp
->length
);
739 memcpy (buf
, fast_tracepoint_jump_shadow (jp
), jp
->length
);
740 err
= write_inferior_memory (where
, buf
, jp
->length
);
746 debug_printf ("Failed to reinsert fast tracepoint jump at"
748 paddress (where
), strerror (err
));
752 /* Set a high-level breakpoint of type TYPE, with low level type
753 RAW_TYPE and kind KIND, at WHERE. On success, a pointer to the new
754 breakpoint is returned. On failure, returns NULL and writes the
755 error code to *ERR. HANDLER is called when the breakpoint is hit.
756 HANDLER should return 1 if the breakpoint should be deleted, 0
759 static struct breakpoint
*
760 set_breakpoint (enum bkpt_type type
, enum raw_bkpt_type raw_type
,
761 CORE_ADDR where
, int kind
,
762 int (*handler
) (CORE_ADDR
), int *err
)
764 struct process_info
*proc
= current_process ();
765 struct breakpoint
*bp
;
766 struct raw_breakpoint
*raw
;
768 raw
= set_raw_breakpoint_at (raw_type
, where
, kind
, err
);
776 bp
= XCNEW (struct breakpoint
);
780 bp
->handler
= handler
;
782 bp
->next
= proc
->breakpoints
;
783 proc
->breakpoints
= bp
;
788 /* See mem-break.h */
791 set_breakpoint_at (CORE_ADDR where
, int (*handler
) (CORE_ADDR
))
794 CORE_ADDR placed_address
= where
;
795 int breakpoint_kind
= target_breakpoint_kind_from_pc (&placed_address
);
797 return set_breakpoint (other_breakpoint
, raw_bkpt_type_sw
,
798 placed_address
, breakpoint_kind
, handler
,
804 delete_raw_breakpoint (struct process_info
*proc
, struct raw_breakpoint
*todel
)
806 struct raw_breakpoint
*bp
, **bp_link
;
809 bp
= proc
->raw_breakpoints
;
810 bp_link
= &proc
->raw_breakpoints
;
816 if (bp
->inserted
> 0)
818 struct raw_breakpoint
*prev_bp_link
= *bp_link
;
822 ret
= the_target
->remove_point (bp
->raw_type
, bp
->pc
, bp
->kind
,
826 /* Something went wrong, relink the breakpoint. */
827 *bp_link
= prev_bp_link
;
830 debug_printf ("Failed to uninsert raw breakpoint "
831 "at 0x%s while deleting it.\n",
849 warning ("Could not find raw breakpoint in list.");
854 release_breakpoint (struct process_info
*proc
, struct breakpoint
*bp
)
859 newrefcount
= bp
->raw
->refcount
- 1;
860 if (newrefcount
== 0)
862 ret
= delete_raw_breakpoint (proc
, bp
->raw
);
867 bp
->raw
->refcount
= newrefcount
;
875 delete_breakpoint_1 (struct process_info
*proc
, struct breakpoint
*todel
)
877 struct breakpoint
*bp
, **bp_link
;
880 bp
= proc
->breakpoints
;
881 bp_link
= &proc
->breakpoints
;
889 err
= release_breakpoint (proc
, bp
);
903 warning ("Could not find breakpoint in list.");
908 delete_breakpoint (struct breakpoint
*todel
)
910 struct process_info
*proc
= current_process ();
911 return delete_breakpoint_1 (proc
, todel
);
914 /* Locate a GDB breakpoint of type Z_TYPE and kind KIND placed at
915 address ADDR and return a pointer to its structure. If KIND is -1,
916 the breakpoint's kind is ignored. */
918 static struct breakpoint
*
919 find_gdb_breakpoint (char z_type
, CORE_ADDR addr
, int kind
)
921 struct process_info
*proc
= current_process ();
922 struct breakpoint
*bp
;
923 enum bkpt_type type
= Z_packet_to_bkpt_type (z_type
);
925 for (bp
= proc
->breakpoints
; bp
!= NULL
; bp
= bp
->next
)
926 if (bp
->type
== type
&& bp
->raw
->pc
== addr
927 && (kind
== -1 || bp
->raw
->kind
== kind
))
934 z_type_supported (char z_type
)
936 return (z_type
>= '0' && z_type
<= '4'
937 && the_target
->supports_z_point_type
!= NULL
938 && the_target
->supports_z_point_type (z_type
));
941 /* Create a new GDB breakpoint of type Z_TYPE at ADDR with kind KIND.
942 Returns a pointer to the newly created breakpoint on success. On
943 failure returns NULL and sets *ERR to either -1 for error, or 1 if
944 Z_TYPE breakpoints are not supported on this target. */
946 static struct breakpoint
*
947 set_gdb_breakpoint_1 (char z_type
, CORE_ADDR addr
, int kind
, int *err
)
949 struct breakpoint
*bp
;
951 enum raw_bkpt_type raw_type
;
953 /* If we see GDB inserting a second code breakpoint at the same
954 address, then either: GDB is updating the breakpoint's conditions
955 or commands; or, the first breakpoint must have disappeared due
956 to a shared library unload. On targets where the shared
957 libraries are handled by userspace, like SVR4, for example,
958 GDBserver can't tell if a library was loaded or unloaded. Since
959 we refcount raw breakpoints, we must be careful to make sure GDB
960 breakpoints never contribute more than one reference. if we
961 didn't do this, in case the previous breakpoint is gone due to a
962 shared library unload, we'd just increase the refcount of the
963 previous breakpoint at this address, but the trap was not planted
964 in the inferior anymore, thus the breakpoint would never be hit.
965 Note this must be careful to not create a window where
966 breakpoints are removed from the target, for non-stop, in case
967 the target can poke at memory while the program is running. */
968 if (z_type
== Z_PACKET_SW_BP
969 || z_type
== Z_PACKET_HW_BP
)
971 bp
= find_gdb_breakpoint (z_type
, addr
, -1);
975 if (bp
->raw
->kind
!= kind
)
977 /* A different kind than previously seen. The previous
978 breakpoint must be gone then. */
979 bp
->raw
->inserted
= -1;
980 delete_breakpoint (bp
);
983 else if (z_type
== Z_PACKET_SW_BP
)
985 /* Check if the breakpoint is actually gone from the
986 target, due to an solib unload, for example. Might
987 as well validate _all_ breakpoints. */
988 validate_breakpoints ();
990 /* Breakpoints that don't pass validation are
992 bp
= find_gdb_breakpoint (z_type
, addr
, -1);
998 /* Data breakpoints for the same address but different kind are
999 expected. GDB doesn't merge these. The backend gets to do
1000 that if it wants/can. */
1001 bp
= find_gdb_breakpoint (z_type
, addr
, kind
);
1006 /* We already know about this breakpoint, there's nothing else
1007 to do - GDB's reference is already accounted for. Note that
1008 whether the breakpoint inserted is left as is - we may be
1009 stepping over it, for example, in which case we don't want to
1010 force-reinsert it. */
1014 raw_type
= Z_packet_to_raw_bkpt_type (z_type
);
1015 type
= Z_packet_to_bkpt_type (z_type
);
1016 return set_breakpoint (type
, raw_type
, addr
, kind
, NULL
, err
);
1020 check_gdb_bp_preconditions (char z_type
, int *err
)
1022 /* As software/memory breakpoints work by poking at memory, we need
1023 to prepare to access memory. If that operation fails, we need to
1024 return error. Seeing an error, if this is the first breakpoint
1025 of that type that GDB tries to insert, GDB would then assume the
1026 breakpoint type is supported, but it may actually not be. So we
1027 need to check whether the type is supported at all before
1028 preparing to access memory. */
1029 if (!z_type_supported (z_type
))
1038 /* See mem-break.h. This is a wrapper for set_gdb_breakpoint_1 that
1039 knows to prepare to access memory for Z0 breakpoints. */
1042 set_gdb_breakpoint (char z_type
, CORE_ADDR addr
, int kind
, int *err
)
1044 struct breakpoint
*bp
;
1046 if (!check_gdb_bp_preconditions (z_type
, err
))
1049 /* If inserting a software/memory breakpoint, need to prepare to
1051 if (z_type
== Z_PACKET_SW_BP
)
1053 if (prepare_to_access_memory () != 0)
1060 bp
= set_gdb_breakpoint_1 (z_type
, addr
, kind
, err
);
1062 if (z_type
== Z_PACKET_SW_BP
)
1063 done_accessing_memory ();
1068 /* Delete a GDB breakpoint of type Z_TYPE and kind KIND previously
1069 inserted at ADDR with set_gdb_breakpoint_at. Returns 0 on success,
1070 -1 on error, and 1 if Z_TYPE breakpoints are not supported on this
1074 delete_gdb_breakpoint_1 (char z_type
, CORE_ADDR addr
, int kind
)
1076 struct breakpoint
*bp
;
1079 bp
= find_gdb_breakpoint (z_type
, addr
, kind
);
1083 /* Before deleting the breakpoint, make sure to free its condition
1084 and command lists. */
1085 clear_breakpoint_conditions_and_commands (bp
);
1086 err
= delete_breakpoint (bp
);
1093 /* See mem-break.h. This is a wrapper for delete_gdb_breakpoint that
1094 knows to prepare to access memory for Z0 breakpoints. */
1097 delete_gdb_breakpoint (char z_type
, CORE_ADDR addr
, int kind
)
1101 if (!check_gdb_bp_preconditions (z_type
, &ret
))
1104 /* If inserting a software/memory breakpoint, need to prepare to
1106 if (z_type
== Z_PACKET_SW_BP
)
1110 err
= prepare_to_access_memory ();
1115 ret
= delete_gdb_breakpoint_1 (z_type
, addr
, kind
);
1117 if (z_type
== Z_PACKET_SW_BP
)
1118 done_accessing_memory ();
1123 /* Clear all conditions associated with a breakpoint. */
1126 clear_breakpoint_conditions (struct breakpoint
*bp
)
1128 struct point_cond_list
*cond
;
1130 if (bp
->cond_list
== NULL
)
1133 cond
= bp
->cond_list
;
1135 while (cond
!= NULL
)
1137 struct point_cond_list
*cond_next
;
1139 cond_next
= cond
->next
;
1140 gdb_free_agent_expr (cond
->cond
);
1145 bp
->cond_list
= NULL
;
1148 /* Clear all commands associated with a breakpoint. */
1151 clear_breakpoint_commands (struct breakpoint
*bp
)
1153 struct point_command_list
*cmd
;
1155 if (bp
->command_list
== NULL
)
1158 cmd
= bp
->command_list
;
1162 struct point_command_list
*cmd_next
;
1164 cmd_next
= cmd
->next
;
1165 gdb_free_agent_expr (cmd
->cmd
);
1170 bp
->command_list
= NULL
;
1174 clear_breakpoint_conditions_and_commands (struct breakpoint
*bp
)
1176 clear_breakpoint_conditions (bp
);
1177 clear_breakpoint_commands (bp
);
1180 /* Add condition CONDITION to GDBserver's breakpoint BP. */
1183 add_condition_to_breakpoint (struct breakpoint
*bp
,
1184 struct agent_expr
*condition
)
1186 struct point_cond_list
*new_cond
;
1188 /* Create new condition. */
1189 new_cond
= XCNEW (struct point_cond_list
);
1190 new_cond
->cond
= condition
;
1192 /* Add condition to the list. */
1193 new_cond
->next
= bp
->cond_list
;
1194 bp
->cond_list
= new_cond
;
1197 /* Add a target-side condition CONDITION to a breakpoint. */
1200 add_breakpoint_condition (struct breakpoint
*bp
, char **condition
)
1202 char *actparm
= *condition
;
1203 struct agent_expr
*cond
;
1205 if (condition
== NULL
)
1211 cond
= gdb_parse_agent_expr (&actparm
);
1215 fprintf (stderr
, "Condition evaluation failed. "
1216 "Assuming unconditional.\n");
1220 add_condition_to_breakpoint (bp
, cond
);
1222 *condition
= actparm
;
1227 /* Evaluate condition (if any) at breakpoint BP. Return 1 if
1228 true and 0 otherwise. */
1231 gdb_condition_true_at_breakpoint_z_type (char z_type
, CORE_ADDR addr
)
1233 /* Fetch registers for the current inferior. */
1234 struct breakpoint
*bp
= find_gdb_breakpoint (z_type
, addr
, -1);
1236 struct point_cond_list
*cl
;
1238 struct eval_agent_expr_context ctx
;
1243 /* Check if the breakpoint is unconditional. If it is,
1244 the condition always evaluates to TRUE. */
1245 if (bp
->cond_list
== NULL
)
1248 ctx
.regcache
= get_thread_regcache (current_thread
, 1);
1252 /* Evaluate each condition in the breakpoint's list of conditions.
1253 Return true if any of the conditions evaluates to TRUE.
1255 If we failed to evaluate the expression, TRUE is returned. This
1256 forces GDB to reevaluate the conditions. */
1257 for (cl
= bp
->cond_list
;
1258 cl
&& !value
&& !err
; cl
= cl
->next
)
1260 /* Evaluate the condition. */
1261 err
= gdb_eval_agent_expr (&ctx
, cl
->cond
, &value
);
1267 return (value
!= 0);
1271 gdb_condition_true_at_breakpoint (CORE_ADDR where
)
1273 /* Only check code (software or hardware) breakpoints. */
1274 return (gdb_condition_true_at_breakpoint_z_type (Z_PACKET_SW_BP
, where
)
1275 || gdb_condition_true_at_breakpoint_z_type (Z_PACKET_HW_BP
, where
));
1278 /* Add commands COMMANDS to GDBserver's breakpoint BP. */
1281 add_commands_to_breakpoint (struct breakpoint
*bp
,
1282 struct agent_expr
*commands
, int persist
)
1284 struct point_command_list
*new_cmd
;
1286 /* Create new command. */
1287 new_cmd
= XCNEW (struct point_command_list
);
1288 new_cmd
->cmd
= commands
;
1289 new_cmd
->persistence
= persist
;
1291 /* Add commands to the list. */
1292 new_cmd
->next
= bp
->command_list
;
1293 bp
->command_list
= new_cmd
;
1296 /* Add a target-side command COMMAND to the breakpoint at ADDR. */
1299 add_breakpoint_commands (struct breakpoint
*bp
, char **command
,
1302 char *actparm
= *command
;
1303 struct agent_expr
*cmd
;
1305 if (command
== NULL
)
1311 cmd
= gdb_parse_agent_expr (&actparm
);
1315 fprintf (stderr
, "Command evaluation failed. "
1320 add_commands_to_breakpoint (bp
, cmd
, persist
);
1327 /* Return true if there are no commands to run at this location,
1328 which likely means we want to report back to GDB. */
1331 gdb_no_commands_at_breakpoint_z_type (char z_type
, CORE_ADDR addr
)
1333 struct breakpoint
*bp
= find_gdb_breakpoint (z_type
, addr
, -1);
1339 debug_printf ("at 0x%s, type Z%c, bp command_list is 0x%s\n",
1340 paddress (addr
), z_type
,
1341 phex_nz ((uintptr_t) bp
->command_list
, 0));
1342 return (bp
->command_list
== NULL
);
1345 /* Return true if there are no commands to run at this location,
1346 which likely means we want to report back to GDB. */
1349 gdb_no_commands_at_breakpoint (CORE_ADDR where
)
1351 /* Only check code (software or hardware) breakpoints. */
1352 return (gdb_no_commands_at_breakpoint_z_type (Z_PACKET_SW_BP
, where
)
1353 && gdb_no_commands_at_breakpoint_z_type (Z_PACKET_HW_BP
, where
));
1356 /* Run a breakpoint's commands. Returns 0 if there was a problem
1357 running any command, 1 otherwise. */
1360 run_breakpoint_commands_z_type (char z_type
, CORE_ADDR addr
)
1362 /* Fetch registers for the current inferior. */
1363 struct breakpoint
*bp
= find_gdb_breakpoint (z_type
, addr
, -1);
1365 struct point_command_list
*cl
;
1367 struct eval_agent_expr_context ctx
;
1372 ctx
.regcache
= get_thread_regcache (current_thread
, 1);
1376 for (cl
= bp
->command_list
;
1377 cl
&& !value
&& !err
; cl
= cl
->next
)
1379 /* Run the command. */
1380 err
= gdb_eval_agent_expr (&ctx
, cl
->cmd
, &value
);
1382 /* If one command has a problem, stop digging the hole deeper. */
1391 run_breakpoint_commands (CORE_ADDR where
)
1393 /* Only check code (software or hardware) breakpoints. If one
1394 command has a problem, stop digging the hole deeper. */
1395 if (run_breakpoint_commands_z_type (Z_PACKET_SW_BP
, where
))
1396 run_breakpoint_commands_z_type (Z_PACKET_HW_BP
, where
);
1399 /* See mem-break.h. */
1402 gdb_breakpoint_here (CORE_ADDR where
)
1404 /* Only check code (software or hardware) breakpoints. */
1405 return (find_gdb_breakpoint (Z_PACKET_SW_BP
, where
, -1) != NULL
1406 || find_gdb_breakpoint (Z_PACKET_HW_BP
, where
, -1) != NULL
);
1410 set_reinsert_breakpoint (CORE_ADDR stop_at
)
1412 struct breakpoint
*bp
;
1414 bp
= set_breakpoint_at (stop_at
, NULL
);
1415 bp
->type
= reinsert_breakpoint
;
1419 delete_reinsert_breakpoints (void)
1421 struct process_info
*proc
= current_process ();
1422 struct breakpoint
*bp
, **bp_link
;
1424 bp
= proc
->breakpoints
;
1425 bp_link
= &proc
->breakpoints
;
1429 if (bp
->type
== reinsert_breakpoint
)
1431 *bp_link
= bp
->next
;
1432 release_breakpoint (proc
, bp
);
1437 bp_link
= &bp
->next
;
1444 uninsert_raw_breakpoint (struct raw_breakpoint
*bp
)
1446 if (bp
->inserted
< 0)
1449 debug_printf ("Breakpoint at %s is marked insert-disabled.\n",
1452 else if (bp
->inserted
> 0)
1458 err
= the_target
->remove_point (bp
->raw_type
, bp
->pc
, bp
->kind
, bp
);
1464 debug_printf ("Failed to uninsert raw breakpoint at 0x%s.\n",
1471 uninsert_breakpoints_at (CORE_ADDR pc
)
1473 struct process_info
*proc
= current_process ();
1474 struct raw_breakpoint
*bp
;
1477 for (bp
= proc
->raw_breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1478 if ((bp
->raw_type
== raw_bkpt_type_sw
1479 || bp
->raw_type
== raw_bkpt_type_hw
)
1485 uninsert_raw_breakpoint (bp
);
1490 /* This can happen when we remove all breakpoints while handling
1493 debug_printf ("Could not find breakpoint at 0x%s "
1494 "in list (uninserting).\n",
1500 uninsert_all_breakpoints (void)
1502 struct process_info
*proc
= current_process ();
1503 struct raw_breakpoint
*bp
;
1505 for (bp
= proc
->raw_breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1506 if ((bp
->raw_type
== raw_bkpt_type_sw
1507 || bp
->raw_type
== raw_bkpt_type_hw
)
1509 uninsert_raw_breakpoint (bp
);
1513 uninsert_reinsert_breakpoints (void)
1515 struct process_info
*proc
= current_process ();
1516 struct breakpoint
*bp
;
1518 for (bp
= proc
->breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1520 if (bp
->type
== reinsert_breakpoint
)
1522 gdb_assert (bp
->raw
->inserted
> 0);
1524 /* Only uninsert the raw breakpoint if it only belongs to a
1525 reinsert breakpoint. */
1526 if (bp
->raw
->refcount
== 1)
1527 uninsert_raw_breakpoint (bp
->raw
);
1533 reinsert_raw_breakpoint (struct raw_breakpoint
*bp
)
1540 err
= the_target
->insert_point (bp
->raw_type
, bp
->pc
, bp
->kind
, bp
);
1543 else if (debug_threads
)
1544 debug_printf ("Failed to reinsert breakpoint at 0x%s (%d).\n",
1545 paddress (bp
->pc
), err
);
1549 reinsert_breakpoints_at (CORE_ADDR pc
)
1551 struct process_info
*proc
= current_process ();
1552 struct raw_breakpoint
*bp
;
1555 for (bp
= proc
->raw_breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1556 if ((bp
->raw_type
== raw_bkpt_type_sw
1557 || bp
->raw_type
== raw_bkpt_type_hw
)
1562 reinsert_raw_breakpoint (bp
);
1567 /* This can happen when we remove all breakpoints while handling
1570 debug_printf ("Could not find raw breakpoint at 0x%s "
1571 "in list (reinserting).\n",
1577 has_reinsert_breakpoints (struct process_info
*proc
)
1579 struct breakpoint
*bp
, **bp_link
;
1581 bp
= proc
->breakpoints
;
1582 bp_link
= &proc
->breakpoints
;
1586 if (bp
->type
== reinsert_breakpoint
)
1590 bp_link
= &bp
->next
;
1599 reinsert_all_breakpoints (void)
1601 struct process_info
*proc
= current_process ();
1602 struct raw_breakpoint
*bp
;
1604 for (bp
= proc
->raw_breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1605 if ((bp
->raw_type
== raw_bkpt_type_sw
1606 || bp
->raw_type
== raw_bkpt_type_hw
)
1608 reinsert_raw_breakpoint (bp
);
1612 reinsert_reinsert_breakpoints (void)
1614 struct process_info
*proc
= current_process ();
1615 struct breakpoint
*bp
;
1617 for (bp
= proc
->breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1619 if (bp
->type
== reinsert_breakpoint
)
1621 gdb_assert (bp
->raw
->inserted
> 0);
1623 if (bp
->raw
->refcount
== 1)
1624 reinsert_raw_breakpoint (bp
->raw
);
1630 check_breakpoints (CORE_ADDR stop_pc
)
1632 struct process_info
*proc
= current_process ();
1633 struct breakpoint
*bp
, **bp_link
;
1635 bp
= proc
->breakpoints
;
1636 bp_link
= &proc
->breakpoints
;
1640 struct raw_breakpoint
*raw
= bp
->raw
;
1642 if ((raw
->raw_type
== raw_bkpt_type_sw
1643 || raw
->raw_type
== raw_bkpt_type_hw
)
1644 && raw
->pc
== stop_pc
)
1648 warning ("Hit a removed breakpoint?");
1652 if (bp
->handler
!= NULL
&& (*bp
->handler
) (stop_pc
))
1654 *bp_link
= bp
->next
;
1656 release_breakpoint (proc
, bp
);
1663 bp_link
= &bp
->next
;
1669 breakpoint_here (CORE_ADDR addr
)
1671 struct process_info
*proc
= current_process ();
1672 struct raw_breakpoint
*bp
;
1674 for (bp
= proc
->raw_breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1675 if ((bp
->raw_type
== raw_bkpt_type_sw
1676 || bp
->raw_type
== raw_bkpt_type_hw
)
1684 breakpoint_inserted_here (CORE_ADDR addr
)
1686 struct process_info
*proc
= current_process ();
1687 struct raw_breakpoint
*bp
;
1689 for (bp
= proc
->raw_breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1690 if ((bp
->raw_type
== raw_bkpt_type_sw
1691 || bp
->raw_type
== raw_bkpt_type_hw
)
1699 /* See mem-break.h. */
1702 software_breakpoint_inserted_here (CORE_ADDR addr
)
1704 struct process_info
*proc
= current_process ();
1705 struct raw_breakpoint
*bp
;
1707 for (bp
= proc
->raw_breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1708 if (bp
->raw_type
== raw_bkpt_type_sw
1716 /* See mem-break.h. */
1719 hardware_breakpoint_inserted_here (CORE_ADDR addr
)
1721 struct process_info
*proc
= current_process ();
1722 struct raw_breakpoint
*bp
;
1724 for (bp
= proc
->raw_breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1725 if (bp
->raw_type
== raw_bkpt_type_hw
1733 /* See mem-break.h. */
1736 reinsert_breakpoint_inserted_here (CORE_ADDR addr
)
1738 struct process_info
*proc
= current_process ();
1739 struct breakpoint
*bp
;
1741 for (bp
= proc
->breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1742 if (bp
->type
== reinsert_breakpoint
1743 && bp
->raw
->pc
== addr
1744 && bp
->raw
->inserted
)
1751 validate_inserted_breakpoint (struct raw_breakpoint
*bp
)
1756 gdb_assert (bp
->inserted
);
1757 gdb_assert (bp
->raw_type
== raw_bkpt_type_sw
);
1759 buf
= (unsigned char *) alloca (bp_size (bp
));
1760 err
= (*the_target
->read_memory
) (bp
->pc
, buf
, bp_size (bp
));
1761 if (err
|| memcmp (buf
, bp_opcode (bp
), bp_size (bp
)) != 0)
1763 /* Tag it as gone. */
1772 delete_disabled_breakpoints (void)
1774 struct process_info
*proc
= current_process ();
1775 struct breakpoint
*bp
, *next
;
1777 for (bp
= proc
->breakpoints
; bp
!= NULL
; bp
= next
)
1780 if (bp
->raw
->inserted
< 0)
1782 /* If reinsert_breakpoints become disabled, that means the
1783 manipulations (insertion and removal) of them are wrong. */
1784 gdb_assert (bp
->type
!= reinsert_breakpoint
);
1785 delete_breakpoint_1 (proc
, bp
);
1790 /* Check if breakpoints we inserted still appear to be inserted. They
1791 may disappear due to a shared library unload, and worse, a new
1792 shared library may be reloaded at the same address as the
1793 previously unloaded one. If that happens, we should make sure that
1794 the shadow memory of the old breakpoints isn't used when reading or
1798 validate_breakpoints (void)
1800 struct process_info
*proc
= current_process ();
1801 struct breakpoint
*bp
;
1803 for (bp
= proc
->breakpoints
; bp
!= NULL
; bp
= bp
->next
)
1805 struct raw_breakpoint
*raw
= bp
->raw
;
1807 if (raw
->raw_type
== raw_bkpt_type_sw
&& raw
->inserted
> 0)
1808 validate_inserted_breakpoint (raw
);
1811 delete_disabled_breakpoints ();
1815 check_mem_read (CORE_ADDR mem_addr
, unsigned char *buf
, int mem_len
)
1817 struct process_info
*proc
= current_process ();
1818 struct raw_breakpoint
*bp
= proc
->raw_breakpoints
;
1819 struct fast_tracepoint_jump
*jp
= proc
->fast_tracepoint_jumps
;
1820 CORE_ADDR mem_end
= mem_addr
+ mem_len
;
1821 int disabled_one
= 0;
1823 for (; jp
!= NULL
; jp
= jp
->next
)
1825 CORE_ADDR bp_end
= jp
->pc
+ jp
->length
;
1826 CORE_ADDR start
, end
;
1827 int copy_offset
, copy_len
, buf_offset
;
1829 gdb_assert (fast_tracepoint_jump_shadow (jp
) >= buf
+ mem_len
1830 || buf
>= fast_tracepoint_jump_shadow (jp
) + (jp
)->length
);
1832 if (mem_addr
>= bp_end
)
1834 if (jp
->pc
>= mem_end
)
1838 if (mem_addr
> start
)
1845 copy_len
= end
- start
;
1846 copy_offset
= start
- jp
->pc
;
1847 buf_offset
= start
- mem_addr
;
1850 memcpy (buf
+ buf_offset
,
1851 fast_tracepoint_jump_shadow (jp
) + copy_offset
,
1855 for (; bp
!= NULL
; bp
= bp
->next
)
1857 CORE_ADDR bp_end
= bp
->pc
+ bp_size (bp
);
1858 CORE_ADDR start
, end
;
1859 int copy_offset
, copy_len
, buf_offset
;
1861 if (bp
->raw_type
!= raw_bkpt_type_sw
)
1864 gdb_assert (bp
->old_data
>= buf
+ mem_len
1865 || buf
>= &bp
->old_data
[sizeof (bp
->old_data
)]);
1867 if (mem_addr
>= bp_end
)
1869 if (bp
->pc
>= mem_end
)
1873 if (mem_addr
> start
)
1880 copy_len
= end
- start
;
1881 copy_offset
= start
- bp
->pc
;
1882 buf_offset
= start
- mem_addr
;
1884 if (bp
->inserted
> 0)
1886 if (validate_inserted_breakpoint (bp
))
1887 memcpy (buf
+ buf_offset
, bp
->old_data
+ copy_offset
, copy_len
);
1894 delete_disabled_breakpoints ();
1898 check_mem_write (CORE_ADDR mem_addr
, unsigned char *buf
,
1899 const unsigned char *myaddr
, int mem_len
)
1901 struct process_info
*proc
= current_process ();
1902 struct raw_breakpoint
*bp
= proc
->raw_breakpoints
;
1903 struct fast_tracepoint_jump
*jp
= proc
->fast_tracepoint_jumps
;
1904 CORE_ADDR mem_end
= mem_addr
+ mem_len
;
1905 int disabled_one
= 0;
1907 /* First fast tracepoint jumps, then breakpoint traps on top. */
1909 for (; jp
!= NULL
; jp
= jp
->next
)
1911 CORE_ADDR jp_end
= jp
->pc
+ jp
->length
;
1912 CORE_ADDR start
, end
;
1913 int copy_offset
, copy_len
, buf_offset
;
1915 gdb_assert (fast_tracepoint_jump_shadow (jp
) >= myaddr
+ mem_len
1916 || myaddr
>= fast_tracepoint_jump_shadow (jp
) + (jp
)->length
);
1917 gdb_assert (fast_tracepoint_jump_insn (jp
) >= buf
+ mem_len
1918 || buf
>= fast_tracepoint_jump_insn (jp
) + (jp
)->length
);
1920 if (mem_addr
>= jp_end
)
1922 if (jp
->pc
>= mem_end
)
1926 if (mem_addr
> start
)
1933 copy_len
= end
- start
;
1934 copy_offset
= start
- jp
->pc
;
1935 buf_offset
= start
- mem_addr
;
1937 memcpy (fast_tracepoint_jump_shadow (jp
) + copy_offset
,
1938 myaddr
+ buf_offset
, copy_len
);
1940 memcpy (buf
+ buf_offset
,
1941 fast_tracepoint_jump_insn (jp
) + copy_offset
, copy_len
);
1944 for (; bp
!= NULL
; bp
= bp
->next
)
1946 CORE_ADDR bp_end
= bp
->pc
+ bp_size (bp
);
1947 CORE_ADDR start
, end
;
1948 int copy_offset
, copy_len
, buf_offset
;
1950 if (bp
->raw_type
!= raw_bkpt_type_sw
)
1953 gdb_assert (bp
->old_data
>= myaddr
+ mem_len
1954 || myaddr
>= &bp
->old_data
[sizeof (bp
->old_data
)]);
1956 if (mem_addr
>= bp_end
)
1958 if (bp
->pc
>= mem_end
)
1962 if (mem_addr
> start
)
1969 copy_len
= end
- start
;
1970 copy_offset
= start
- bp
->pc
;
1971 buf_offset
= start
- mem_addr
;
1973 memcpy (bp
->old_data
+ copy_offset
, myaddr
+ buf_offset
, copy_len
);
1974 if (bp
->inserted
> 0)
1976 if (validate_inserted_breakpoint (bp
))
1977 memcpy (buf
+ buf_offset
, bp_opcode (bp
) + copy_offset
, copy_len
);
1984 delete_disabled_breakpoints ();
1987 /* Delete all breakpoints, and un-insert them from the inferior. */
1990 delete_all_breakpoints (void)
1992 struct process_info
*proc
= current_process ();
1994 while (proc
->breakpoints
)
1995 delete_breakpoint_1 (proc
, proc
->breakpoints
);
1998 /* Clear the "inserted" flag in all breakpoints. */
2001 mark_breakpoints_out (struct process_info
*proc
)
2003 struct raw_breakpoint
*raw_bp
;
2005 for (raw_bp
= proc
->raw_breakpoints
; raw_bp
!= NULL
; raw_bp
= raw_bp
->next
)
2006 raw_bp
->inserted
= 0;
2009 /* Release all breakpoints, but do not try to un-insert them from the
2013 free_all_breakpoints (struct process_info
*proc
)
2015 mark_breakpoints_out (proc
);
2017 /* Note: use PROC explicitly instead of deferring to
2018 delete_all_breakpoints --- CURRENT_INFERIOR may already have been
2019 released when we get here. There should be no call to
2020 current_process from here on. */
2021 while (proc
->breakpoints
)
2022 delete_breakpoint_1 (proc
, proc
->breakpoints
);
2025 /* Clone an agent expression. */
2027 static struct agent_expr
*
2028 clone_agent_expr (const struct agent_expr
*src_ax
)
2030 struct agent_expr
*ax
;
2032 ax
= XCNEW (struct agent_expr
);
2033 ax
->length
= src_ax
->length
;
2034 ax
->bytes
= (unsigned char *) xcalloc (ax
->length
, 1);
2035 memcpy (ax
->bytes
, src_ax
->bytes
, ax
->length
);
2039 /* Deep-copy the contents of one breakpoint to another. */
2041 static struct breakpoint
*
2042 clone_one_breakpoint (const struct breakpoint
*src
)
2044 struct breakpoint
*dest
;
2045 struct raw_breakpoint
*dest_raw
;
2046 struct point_cond_list
*current_cond
;
2047 struct point_cond_list
*new_cond
;
2048 struct point_cond_list
*cond_tail
= NULL
;
2049 struct point_command_list
*current_cmd
;
2050 struct point_command_list
*new_cmd
;
2051 struct point_command_list
*cmd_tail
= NULL
;
2053 /* Clone the raw breakpoint. */
2054 dest_raw
= XCNEW (struct raw_breakpoint
);
2055 dest_raw
->raw_type
= src
->raw
->raw_type
;
2056 dest_raw
->refcount
= src
->raw
->refcount
;
2057 dest_raw
->pc
= src
->raw
->pc
;
2058 dest_raw
->kind
= src
->raw
->kind
;
2059 memcpy (dest_raw
->old_data
, src
->raw
->old_data
, MAX_BREAKPOINT_LEN
);
2060 dest_raw
->inserted
= src
->raw
->inserted
;
2062 /* Clone the high-level breakpoint. */
2063 dest
= XCNEW (struct breakpoint
);
2064 dest
->type
= src
->type
;
2065 dest
->raw
= dest_raw
;
2066 dest
->handler
= src
->handler
;
2068 /* Clone the condition list. */
2069 for (current_cond
= src
->cond_list
; current_cond
!= NULL
;
2070 current_cond
= current_cond
->next
)
2072 new_cond
= XCNEW (struct point_cond_list
);
2073 new_cond
->cond
= clone_agent_expr (current_cond
->cond
);
2074 APPEND_TO_LIST (&dest
->cond_list
, new_cond
, cond_tail
);
2077 /* Clone the command list. */
2078 for (current_cmd
= src
->command_list
; current_cmd
!= NULL
;
2079 current_cmd
= current_cmd
->next
)
2081 new_cmd
= XCNEW (struct point_command_list
);
2082 new_cmd
->cmd
= clone_agent_expr (current_cmd
->cmd
);
2083 new_cmd
->persistence
= current_cmd
->persistence
;
2084 APPEND_TO_LIST (&dest
->command_list
, new_cmd
, cmd_tail
);
2090 /* Create a new breakpoint list NEW_LIST that is a copy of the
2091 list starting at SRC_LIST. Create the corresponding new
2092 raw_breakpoint list NEW_RAW_LIST as well. */
2095 clone_all_breakpoints (struct breakpoint
**new_list
,
2096 struct raw_breakpoint
**new_raw_list
,
2097 const struct breakpoint
*src_list
)
2099 const struct breakpoint
*bp
;
2100 struct breakpoint
*new_bkpt
;
2101 struct breakpoint
*bkpt_tail
= NULL
;
2102 struct raw_breakpoint
*raw_bkpt_tail
= NULL
;
2104 for (bp
= src_list
; bp
!= NULL
; bp
= bp
->next
)
2106 new_bkpt
= clone_one_breakpoint (bp
);
2107 APPEND_TO_LIST (new_list
, new_bkpt
, bkpt_tail
);
2108 APPEND_TO_LIST (new_raw_list
, new_bkpt
->raw
, raw_bkpt_tail
);