2 * Debugger break-points handling
4 * Copyright 1994 Martin von Loewis
5 * Copyright 1995 Alexandre Julliard
6 * Copyright 1999,2000 Eric Pouech
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library 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 GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "wine/debug.h"
27 WINE_DEFAULT_DEBUG_CHANNEL(winedbg
);
29 /***********************************************************************
32 * Set or remove all the breakpoints & watchpoints
34 void break_set_xpoints(BOOL set
)
36 static BOOL last
; /* = 0 = FALSE */
38 unsigned int i
, ret
, size
;
40 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
42 if (set
== last
) return;
45 for (i
= 0; i
< dbg_curr_process
->next_bp
; i
++)
47 if (!bp
[i
].refcount
|| !bp
[i
].enabled
) continue;
49 if (bp
[i
].xpoint_type
== be_xpoint_break
)
52 size
= bp
[i
].w
.len
+ 1;
53 addr
= (void*)memory_to_linear_addr(&bp
[i
].addr
);
56 ret
= be_cpu
->insert_Xpoint(dbg_curr_process
->handle
,
57 dbg_curr_process
->process_io
,
58 &dbg_context
, bp
[i
].xpoint_type
, addr
,
61 ret
= be_cpu
->remove_Xpoint(dbg_curr_process
->handle
,
62 dbg_curr_process
->process_io
,
63 &dbg_context
, bp
[i
].xpoint_type
, addr
,
67 dbg_printf("Invalid address (");
68 print_address(&bp
[i
].addr
, FALSE
);
69 dbg_printf(") for breakpoint %d, disabling it\n", i
);
70 bp
[i
].enabled
= FALSE
;
75 /***********************************************************************
78 * Find the breakpoint for a given address. Return the breakpoint
79 * number or -1 if none.
81 static int find_xpoint(const ADDRESS
* addr
, enum be_xpoint_type type
)
84 void* lin
= memory_to_linear_addr(addr
);
85 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
87 for (i
= 0; i
< dbg_curr_process
->next_bp
; i
++)
89 if (bp
[i
].refcount
&& bp
[i
].enabled
&& bp
[i
].xpoint_type
== type
&&
90 memory_to_linear_addr(&bp
[i
].addr
) == lin
)
96 /***********************************************************************
99 * Find an empty slot in BP table to add a new break/watch point
101 static int init_xpoint(int type
, const ADDRESS
* addr
)
104 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
106 for (num
= (dbg_curr_process
->next_bp
< MAX_BREAKPOINTS
) ?
107 dbg_curr_process
->next_bp
++ : 1;
108 num
< MAX_BREAKPOINTS
; num
++)
110 if (bp
[num
].refcount
== 0)
112 bp
[num
].refcount
= 1;
113 bp
[num
].enabled
= TRUE
;
114 bp
[num
].xpoint_type
= type
;
115 bp
[num
].skipcount
= 0;
116 bp
[num
].addr
= *addr
;
121 dbg_printf("Too many bp. Please delete some.\n");
125 /***********************************************************************
128 * Returns the value watched by watch point 'num'.
130 static BOOL
get_watched_value(int num
, LPDWORD val
)
134 if (!dbg_read_memory(memory_to_linear_addr(&dbg_curr_process
->bp
[num
].addr
),
135 buf
, dbg_curr_process
->bp
[num
].w
.len
+ 1))
138 switch (dbg_curr_process
->bp
[num
].w
.len
+ 1)
140 case 4: *val
= *(DWORD
*)buf
; break;
141 case 2: *val
= *(WORD
*)buf
; break;
142 case 1: *val
= *(BYTE
*)buf
; break;
143 default: RaiseException(DEBUG_STATUS_INTERNAL_ERROR
, 0, 0, NULL
);
148 /***********************************************************************
153 BOOL
break_add_break(const ADDRESS
* addr
, BOOL verbose
)
157 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
159 if ((num
= find_xpoint(addr
, be_xpoint_break
)) >= 1)
162 dbg_printf("Breakpoint %d at ", num
);
163 print_address(&bp
[num
].addr
, TRUE
);
164 dbg_printf(" (refcount=%d)\n", bp
[num
].refcount
);
168 if (!dbg_read_memory(memory_to_linear_addr(addr
), &ch
, sizeof(ch
)))
172 dbg_printf("Invalid address ");
173 print_bare_address(addr
);
174 dbg_printf(", can't set breakpoint\n");
179 if ((num
= init_xpoint(be_xpoint_break
, addr
)) == -1)
182 dbg_printf("Breakpoint %d at ", num
);
183 print_address(&bp
[num
].addr
, TRUE
);
189 /***********************************************************************
190 * break_add_break_from_lvalue
194 BOOL
break_add_break_from_lvalue(const struct dbg_lvalue
* lvalue
)
198 types_extract_as_address(lvalue
, &addr
);
200 if (!break_add_break(&addr
, TRUE
))
202 if (!DBG_IVAR(CanDeferOnBPByAddr
))
204 dbg_printf("Invalid address, can't set breakpoint\n"
205 "You can turn on deferring bp by address by setting $CanDeferOnBPByAddr to 1\n");
208 dbg_printf("Unable to add breakpoint, will check again any time a new DLL is loaded\n");
209 dbg_curr_process
->delayed_bp
=
210 dbg_heap_realloc(dbg_curr_process
->delayed_bp
,
211 sizeof(struct dbg_delayed_bp
) * ++dbg_curr_process
->num_delayed_bp
);
213 dbg_curr_process
->delayed_bp
[dbg_curr_process
->num_delayed_bp
- 1].is_symbol
= FALSE
;
214 dbg_curr_process
->delayed_bp
[dbg_curr_process
->num_delayed_bp
- 1].u
.addr
= addr
;
220 /***********************************************************************
221 * break_add_break_from_id
223 * Add a breakpoint from a function name (and eventually a line #)
225 void break_add_break_from_id(const char *name
, int lineno
)
227 struct dbg_lvalue lvalue
;
230 switch (symbol_get_lvalue(name
, lineno
, &lvalue
, TRUE
))
233 break_add_break(&lvalue
.addr
, TRUE
);
237 case sglv_aborted
: /* user aborted symbol lookup */
241 dbg_printf("Unable to add breakpoint, will check again when a new DLL is loaded\n");
242 for (i
= 0; i
< dbg_curr_process
->num_delayed_bp
; i
++)
244 if (dbg_curr_process
->delayed_bp
[i
].is_symbol
&&
245 !strcmp(name
, dbg_curr_process
->delayed_bp
[i
].u
.symbol
.name
) &&
246 lineno
== dbg_curr_process
->delayed_bp
[i
].u
.symbol
.lineno
)
249 dbg_curr_process
->delayed_bp
= dbg_heap_realloc(dbg_curr_process
->delayed_bp
,
250 sizeof(struct dbg_delayed_bp
) * ++dbg_curr_process
->num_delayed_bp
);
252 dbg_curr_process
->delayed_bp
[dbg_curr_process
->num_delayed_bp
- 1].is_symbol
= TRUE
;
253 dbg_curr_process
->delayed_bp
[dbg_curr_process
->num_delayed_bp
- 1].u
.symbol
.name
= strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(name
) + 1), name
);
254 dbg_curr_process
->delayed_bp
[dbg_curr_process
->num_delayed_bp
- 1].u
.symbol
.lineno
= lineno
;
257 struct cb_break_lineno
263 static BOOL CALLBACK
line_cb(SRCCODEINFO
* sci
, void* user
)
265 struct cb_break_lineno
* bkln
= user
;
267 if (bkln
->lineno
== sci
->LineNumber
)
269 bkln
->addr
.Mode
= AddrModeFlat
;
270 bkln
->addr
.Offset
= sci
->Address
;
276 /***********************************************************************
277 * break_add_break_from_lineno
279 * Add a breakpoint from a line number in current file
281 void break_add_break_from_lineno(int lineno
)
283 struct cb_break_lineno bkln
;
285 memory_get_current_pc(&bkln
.addr
);
293 DWORD linear
= (DWORD
)memory_to_linear_addr(&bkln
.addr
);
295 il
.SizeOfStruct
= sizeof(il
);
296 if (!SymGetLineFromAddr(dbg_curr_process
->handle
, linear
, &disp
, &il
))
299 dbg_printf("Unable to add breakpoint (unknown address %lx)\n", linear
);
302 bkln
.addr
.Offset
= 0;
303 bkln
.lineno
= lineno
;
304 SymEnumLines(dbg_curr_process
->handle
, linear
, NULL
, il
.FileName
, line_cb
, &bkln
);
305 if (!bkln
.addr
.Offset
)
307 dbg_printf("Unknown line number\n"
308 "(either out of file, or no code at given line number)\n");
313 break_add_break(&bkln
.addr
, TRUE
);
316 /***********************************************************************
317 * break_check_delayed_bp
319 * Check is a registered delayed BP is now available.
321 void break_check_delayed_bp(void)
323 struct dbg_lvalue lvalue
;
325 struct dbg_delayed_bp
* dbp
= dbg_curr_process
->delayed_bp
;
327 for (i
= 0; i
< dbg_curr_process
->num_delayed_bp
; i
++)
329 if (dbp
[i
].is_symbol
)
331 if (symbol_get_lvalue(dbp
[i
].u
.symbol
.name
, dbp
[i
].u
.symbol
.lineno
,
332 &lvalue
, TRUE
) != sglv_found
)
334 if (lvalue
.cookie
!= DLV_TARGET
) continue;
337 lvalue
.addr
= dbp
[i
].u
.addr
;
338 WINE_TRACE("trying to add delayed %s-bp\n", dbp
[i
].is_symbol
? "S" : "A");
339 if (!dbp
[i
].is_symbol
)
340 WINE_TRACE("\t%04x:%08lx\n",
341 dbp
[i
].u
.addr
.Segment
, dbp
[i
].u
.addr
.Offset
);
343 WINE_TRACE("\t'%s' @ %d\n",
344 dbp
[i
].u
.symbol
.name
, dbp
[i
].u
.symbol
.lineno
);
346 if (break_add_break(&lvalue
.addr
, FALSE
))
347 memmove(&dbp
[i
], &dbp
[i
+1], (--dbg_curr_process
->num_delayed_bp
- i
) * sizeof(*dbp
));
351 /***********************************************************************
356 static void break_add_watch(const struct dbg_lvalue
* lvalue
, BOOL is_write
)
361 num
= init_xpoint((is_write
) ? be_xpoint_watch_write
: be_xpoint_watch_read
,
363 if (num
== -1) return;
365 if (lvalue
->type
.id
!= dbg_itype_none
)
367 if (types_get_info(&lvalue
->type
, TI_GET_LENGTH
, &l
))
371 case 4: case 2: case 1: break;
373 dbg_printf("Unsupported length (%s) for watch-points, defaulting to 4\n",
374 wine_dbgstr_longlong(l
));
378 else dbg_printf("Cannot get watch size, defaulting to 4\n");
380 dbg_curr_process
->bp
[num
].w
.len
= (DWORD
)l
- 1;
382 if (!get_watched_value(num
, &dbg_curr_process
->bp
[num
].w
.oldval
))
384 dbg_printf("Bad address. Watchpoint not set\n");
385 dbg_curr_process
->bp
[num
].refcount
= 0;
388 dbg_printf("Watchpoint %d at ", num
);
389 print_address(&dbg_curr_process
->bp
[num
].addr
, TRUE
);
393 /******************************************************************
394 * break_add_watch_from_lvalue
396 * Adds a watch point from an address (stored in a lvalue)
398 void break_add_watch_from_lvalue(const struct dbg_lvalue
* lvalue
)
400 struct dbg_lvalue lval
;
402 types_extract_as_address(lvalue
, &lval
.addr
);
403 lval
.type
.id
= dbg_itype_none
;
405 break_add_watch(&lval
, TRUE
);
408 /***********************************************************************
409 * break_add_watch_from_id
411 * Add a watchpoint from a symbol name
413 void break_add_watch_from_id(const char *name
)
415 struct dbg_lvalue lvalue
;
417 switch (symbol_get_lvalue(name
, -1, &lvalue
, TRUE
))
420 break_add_watch(&lvalue
, 1);
423 dbg_printf("Unable to add watchpoint\n");
425 case sglv_aborted
: /* user aborted symbol lookup */
430 /***********************************************************************
431 * break_delete_xpoint
433 * Delete a breakpoint.
435 void break_delete_xpoint(int num
)
437 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
439 if ((num
<= 0) || (num
>= dbg_curr_process
->next_bp
) ||
440 bp
[num
].refcount
== 0)
442 dbg_printf("Invalid breakpoint number %d\n", num
);
446 if (--bp
[num
].refcount
> 0)
449 if (bp
[num
].condition
!= NULL
)
451 expr_free(bp
[num
].condition
);
452 bp
[num
].condition
= NULL
;
455 bp
[num
].enabled
= FALSE
;
456 bp
[num
].refcount
= 0;
457 bp
[num
].skipcount
= 0;
460 static inline BOOL
module_is_container(const IMAGEHLP_MODULE
* wmod_cntnr
,
461 const IMAGEHLP_MODULE
* wmod_child
)
463 return wmod_cntnr
->BaseOfImage
<= wmod_child
->BaseOfImage
&&
464 (DWORD
)wmod_cntnr
->BaseOfImage
+ wmod_cntnr
->ImageSize
>=
465 (DWORD
)wmod_child
->BaseOfImage
+ wmod_child
->ImageSize
;
468 /******************************************************************
469 * break_delete_xpoints_from_module
471 * Remove all Xpoints from module which base is 'base'
473 void break_delete_xpoints_from_module(unsigned long base
)
475 IMAGEHLP_MODULE im
, im_elf
;
478 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
480 /* FIXME: should do it also on the ELF sibbling if any */
481 im
.SizeOfStruct
= sizeof(im
);
482 im_elf
.SizeOfStruct
= sizeof(im_elf
);
483 if (!SymGetModuleInfo(dbg_curr_process
->handle
, base
, &im
)) return;
485 /* try to get in fact the underlying ELF module (if any) */
486 if (SymGetModuleInfo(dbg_curr_process
->handle
, im
.BaseOfImage
- 1, &im_elf
) &&
487 im_elf
.BaseOfImage
<= im
.BaseOfImage
&&
488 (DWORD
)im_elf
.BaseOfImage
+ im_elf
.ImageSize
>= (DWORD
)im
.BaseOfImage
+ im
.ImageSize
)
491 for (i
= 0; i
< dbg_curr_process
->next_bp
; i
++)
493 linear
= (DWORD
)memory_to_linear_addr(&bp
[i
].addr
);
494 if (bp
[i
].refcount
&& bp
[i
].enabled
&&
495 im
.BaseOfImage
<= linear
&& linear
< im
.BaseOfImage
+ im
.ImageSize
)
497 break_delete_xpoint(i
);
502 /***********************************************************************
503 * break_enable_xpoint
505 * Enable or disable a break point.
507 void break_enable_xpoint(int num
, BOOL enable
)
509 if ((num
<= 0) || (num
>= dbg_curr_process
->next_bp
) ||
510 dbg_curr_process
->bp
[num
].refcount
== 0)
512 dbg_printf("Invalid breakpoint number %d\n", num
);
515 dbg_curr_process
->bp
[num
].enabled
= (enable
) ? TRUE
: FALSE
;
516 dbg_curr_process
->bp
[num
].skipcount
= 0;
520 /***********************************************************************
521 * find_triggered_watch
523 * Lookup the watchpoints to see if one has been triggered
524 * Return >= (watch point index) if one is found and *oldval is set to
525 * the value watched before the TRAP
526 * Return -1 if none found (*oldval is undetermined)
528 * Unfortunately, Linux does *NOT* (A REAL PITA) report with ptrace
529 * the DR6 register value, so we have to look with our own need the
533 static int find_triggered_watch(LPDWORD oldval
)
537 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
539 /* Method 1 => get triggered watchpoint from context (doesn't work on Linux
540 * 2.2.x). This should be fixed in >= 2.2.16
542 for (i
= 0; i
< dbg_curr_process
->next_bp
; i
++)
546 if (bp
[i
].refcount
&& bp
[i
].enabled
&& bp
[i
].xpoint_type
!= be_xpoint_break
&&
547 (be_cpu
->is_watchpoint_set(&dbg_context
, bp
[i
].info
)))
549 be_cpu
->clear_watchpoint(&dbg_context
, bp
[i
].info
);
551 *oldval
= bp
[i
].w
.oldval
;
552 if (get_watched_value(i
, &val
))
554 bp
[i
].w
.oldval
= val
;
560 /* Method 1 failed, trying method 2 */
562 /* Method 2 => check if value has changed among registered watchpoints
563 * this really sucks, but this is how gdb 4.18 works on my linux box
566 for (i
= 0; i
< dbg_curr_process
->next_bp
; i
++)
570 if (bp
[i
].refcount
&& bp
[i
].enabled
&& bp
[i
].xpoint_type
!= be_xpoint_break
&&
571 get_watched_value(i
, &val
))
573 *oldval
= bp
[i
].w
.oldval
;
576 be_cpu
->clear_watchpoint(&dbg_context
, bp
[i
].info
);
577 bp
[i
].w
.oldval
= val
;
579 /* cannot break, because two watch points may have been triggered on
581 * only one will be reported to the user (FIXME ?)
589 /***********************************************************************
592 * Display break & watch points information.
594 void break_info(void)
597 int nbp
= 0, nwp
= 0;
598 struct dbg_delayed_bp
* dbp
= dbg_curr_process
->delayed_bp
;
599 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
601 for (i
= 1; i
< dbg_curr_process
->next_bp
; i
++)
605 if (bp
[i
].xpoint_type
== be_xpoint_break
) nbp
++; else nwp
++;
611 dbg_printf("Breakpoints:\n");
612 for (i
= 1; i
< dbg_curr_process
->next_bp
; i
++)
614 if (!bp
[i
].refcount
|| bp
[i
].xpoint_type
!= be_xpoint_break
)
616 dbg_printf("%d: %c ", i
, bp
[i
].enabled
? 'y' : 'n');
617 print_address(&bp
[i
].addr
, TRUE
);
618 dbg_printf(" (%u)\n", bp
[i
].refcount
);
619 if (bp
[i
].condition
!= NULL
)
621 dbg_printf("\t\tstop when ");
622 expr_print(bp
[i
].condition
);
627 else dbg_printf("No breakpoints\n");
630 dbg_printf("Watchpoints:\n");
631 for (i
= 1; i
< dbg_curr_process
->next_bp
; i
++)
633 if (!bp
[i
].refcount
|| bp
[i
].xpoint_type
== be_xpoint_break
)
635 dbg_printf("%d: %c ", i
, bp
[i
].enabled
? 'y' : 'n');
636 print_address(&bp
[i
].addr
, TRUE
);
637 dbg_printf(" on %d byte%s (%c)\n",
638 bp
[i
].w
.len
+ 1, bp
[i
].w
.len
> 0 ? "s" : "",
639 bp
[i
].xpoint_type
== be_xpoint_watch_write
? 'W' : 'R');
640 if (bp
[i
].condition
!= NULL
)
642 dbg_printf("\t\tstop when ");
643 expr_print(bp
[i
].condition
);
648 else dbg_printf("No watchpoints\n");
649 if (dbg_curr_process
->num_delayed_bp
)
651 dbg_printf("Delayed breakpoints:\n");
652 for (i
= 0; i
< dbg_curr_process
->num_delayed_bp
; i
++)
654 if (dbp
[i
].is_symbol
)
656 dbg_printf("%d: %s", i
, dbp
[i
].u
.symbol
.name
);
657 if (dbp
[i
].u
.symbol
.lineno
!= -1)
658 dbg_printf(" at line %u", dbp
[i
].u
.symbol
.lineno
);
662 dbg_printf("%d: ", i
);
663 print_address(&dbp
[i
].u
.addr
, FALSE
);
670 /***********************************************************************
673 * Check whether or not the condition (bp / skipcount) of a break/watch
676 static BOOL
should_stop(int bpnum
)
678 struct dbg_breakpoint
* bp
= &dbg_curr_process
->bp
[bpnum
];
680 if (bp
->condition
!= NULL
)
682 struct dbg_lvalue lvalue
= expr_eval(bp
->condition
);
684 if (lvalue
.type
.id
== dbg_itype_none
)
687 * Something wrong - unable to evaluate this expression.
689 dbg_printf("Unable to evaluate expression ");
690 expr_print(bp
->condition
);
691 dbg_printf("\nTurning off condition\n");
692 break_add_condition(bpnum
, NULL
);
694 else if (!types_extract_as_integer(&lvalue
))
700 if (bp
->skipcount
> 0) bp
->skipcount
--;
701 return bp
->skipcount
== 0;
704 /***********************************************************************
705 * break_should_continue
707 * Determine if we should continue execution after a SIGTRAP signal when
708 * executing in the given mode.
710 BOOL
break_should_continue(ADDRESS
* addr
, DWORD code
, int* count
, BOOL
* is_break
)
715 enum dbg_exec_mode mode
= dbg_curr_thread
->exec_mode
;
718 /* If not single-stepping, back up to the break instruction */
719 if (code
== EXCEPTION_BREAKPOINT
)
720 addr
->Offset
+= be_cpu
->adjust_pc_for_break(&dbg_context
, TRUE
);
722 bpnum
= find_xpoint(addr
, be_xpoint_break
);
723 dbg_curr_process
->bp
[0].enabled
= FALSE
; /* disable the step-over breakpoint */
727 if (!should_stop(bpnum
)) return TRUE
;
729 dbg_printf("Stopped on breakpoint %d at ", bpnum
);
730 print_address(&dbg_curr_process
->bp
[bpnum
].addr
, TRUE
);
735 wpnum
= find_triggered_watch(&oldval
);
738 /* If not single-stepping, do not back up over the break instruction */
739 if (code
== EXCEPTION_BREAKPOINT
)
740 addr
->Offset
+= be_cpu
->adjust_pc_for_break(&dbg_context
, FALSE
);
742 if (!should_stop(wpnum
)) return TRUE
;
744 dbg_printf("Stopped on watchpoint %d at ", wpnum
);
745 print_address(addr
, TRUE
);
746 dbg_printf(" values: old=%lu new=%lu\n",
747 oldval
, dbg_curr_process
->bp
[wpnum
].w
.oldval
);
752 * If our mode indicates that we are stepping line numbers,
753 * get the current function, and figure out if we are exactly
754 * on a line number or not.
756 if (mode
== dbg_exec_step_over_line
|| mode
== dbg_exec_step_into_line
)
758 if (symbol_get_function_line_status(addr
) == dbg_on_a_line_number
)
763 else if (mode
== dbg_exec_step_over_insn
|| mode
== dbg_exec_step_into_insn
)
768 if (*count
> 0 || mode
== dbg_exec_finish
)
771 * We still need to execute more instructions.
776 /* If there's no breakpoint and we are not single-stepping, then
777 * either we must have encountered a break insn in the Windows program
778 * or someone is trying to stop us
780 if (bpnum
== -1 && code
== EXCEPTION_BREAKPOINT
)
783 addr
->Offset
+= be_cpu
->adjust_pc_for_break(&dbg_context
, FALSE
);
787 /* no breakpoint, continue if in continuous mode */
788 return mode
== dbg_exec_cont
|| mode
== dbg_exec_finish
;
791 /***********************************************************************
792 * break_suspend_execution
794 * Remove all bp before entering the debug loop
796 void break_suspend_execution(void)
798 break_set_xpoints(FALSE
);
799 dbg_curr_process
->bp
[0] = dbg_curr_thread
->step_over_bp
;
802 /***********************************************************************
803 * break_restart_execution
805 * Set the bp to the correct state to restart execution
808 void break_restart_execution(int count
)
812 enum dbg_line_status status
;
813 enum dbg_exec_mode mode
, ret_mode
;
817 memory_get_current_pc(&addr
);
818 linear
= memory_to_linear_addr(&addr
);
821 * This is the mode we will be running in after we finish. We would like
822 * to be able to modify this in certain cases.
824 ret_mode
= mode
= dbg_curr_thread
->exec_mode
;
826 bp
= find_xpoint(&addr
, be_xpoint_break
);
827 if (bp
!= -1 && bp
!= 0)
830 * If we have set a new value, then save it in the BP number.
832 if (count
!= 0 && mode
== dbg_exec_cont
)
834 dbg_curr_process
->bp
[bp
].skipcount
= count
;
836 mode
= dbg_exec_step_into_insn
; /* If there's a breakpoint, skip it */
838 else if (mode
== dbg_exec_cont
&& count
> 1)
840 dbg_printf("Not stopped at any breakpoint; argument ignored.\n");
843 if (mode
== dbg_exec_finish
&& be_cpu
->is_function_return(linear
))
845 mode
= ret_mode
= dbg_exec_step_into_insn
;
849 * See if the function we are stepping into has debug info
850 * and line numbers. If not, then we step over it instead.
851 * FIXME - we need to check for things like thunks or trampolines,
852 * as the actual function may in fact have debug info.
854 if (be_cpu
->is_function_call(linear
, &callee
))
856 status
= symbol_get_function_line_status(&callee
);
858 /* FIXME: we need to get the thunk type */
860 * Anytime we have a trampoline, step over it.
862 if ((mode
== EXEC_STEP_OVER
|| mode
== EXEC_STEPI_OVER
)
863 && status
== dbg_in_a_thunk
)
865 WINE_WARN("Not stepping into trampoline at %p (no lines)\n",
866 memory_to_linear_addr(&callee
));
867 mode
= EXEC_STEP_OVER_TRAMPOLINE
;
870 if (mode
== dbg_exec_step_into_line
&& status
== dbg_no_line_info
)
872 WINE_WARN("Not stepping into function at %p (no lines)\n",
873 memory_to_linear_addr(&callee
));
874 mode
= dbg_exec_step_over_line
;
878 if (mode
== dbg_exec_step_into_line
&&
879 symbol_get_function_line_status(&addr
) == dbg_no_line_info
)
881 dbg_printf("Single stepping until exit from function, \n"
882 "which has no line number information.\n");
883 ret_mode
= mode
= dbg_exec_finish
;
888 case dbg_exec_cont
: /* Continuous execution */
889 be_cpu
->single_step(&dbg_context
, FALSE
);
890 break_set_xpoints(TRUE
);
894 case EXEC_STEP_OVER_TRAMPOLINE
:
896 * This is the means by which we step over our conversion stubs
897 * in callfrom*.s and callto*.s. We dig the appropriate address
898 * off the stack, and we set the breakpoint there instead of the
899 * address just after the call.
901 be_cpu
->get_addr(dbg_curr_thread
->handle
, &dbg_context
,
902 be_cpu_addr_stack
, &addr
);
903 /* FIXME: we assume stack grows as on an i386 */
904 addr
.Offset
+= 2 * sizeof(unsigned int);
905 dbg_read_memory(memory_to_linear_addr(&addr
),
906 &addr
.Offset
, sizeof(addr
.Offset
));
907 dbg_curr_process
->bp
[0].addr
= addr
;
908 dbg_curr_process
->bp
[0].enabled
= TRUE
;
909 dbg_curr_process
->bp
[0].refcount
= 1;
910 dbg_curr_process
->bp
[0].skipcount
= 0;
911 dbg_curr_process
->bp
[0].xpoint_type
= be_xpoint_break
;
912 dbg_curr_process
->bp
[0].condition
= NULL
;
913 be_cpu
->single_step(&dbg_context
, FALSE
);
914 break_set_xpoints(TRUE
);
918 case dbg_exec_finish
:
919 case dbg_exec_step_over_insn
: /* Stepping over a call */
920 case dbg_exec_step_over_line
: /* Stepping over a call */
921 if (be_cpu
->is_step_over_insn(linear
))
923 be_cpu
->disasm_one_insn(&addr
, FALSE
);
924 dbg_curr_process
->bp
[0].addr
= addr
;
925 dbg_curr_process
->bp
[0].enabled
= TRUE
;
926 dbg_curr_process
->bp
[0].refcount
= 1;
927 dbg_curr_process
->bp
[0].skipcount
= 0;
928 dbg_curr_process
->bp
[0].xpoint_type
= be_xpoint_break
;
929 dbg_curr_process
->bp
[0].condition
= NULL
;
930 be_cpu
->single_step(&dbg_context
, FALSE
);
931 break_set_xpoints(TRUE
);
934 /* else fall through to single-stepping */
936 case dbg_exec_step_into_line
: /* Single-stepping a line */
937 case dbg_exec_step_into_insn
: /* Single-stepping an instruction */
938 be_cpu
->single_step(&dbg_context
, TRUE
);
940 default: RaiseException(DEBUG_STATUS_INTERNAL_ERROR
, 0, 0, NULL
);
942 dbg_curr_thread
->step_over_bp
= dbg_curr_process
->bp
[0];
943 dbg_curr_thread
->exec_mode
= ret_mode
;
946 int break_add_condition(int num
, struct expr
* exp
)
948 if (num
<= 0 || num
>= dbg_curr_process
->next_bp
||
949 !dbg_curr_process
->bp
[num
].refcount
)
951 dbg_printf("Invalid breakpoint number %d\n", num
);
955 if (dbg_curr_process
->bp
[num
].condition
!= NULL
)
957 expr_free(dbg_curr_process
->bp
[num
].condition
);
958 dbg_curr_process
->bp
[num
].condition
= NULL
;
961 if (exp
!= NULL
) dbg_curr_process
->bp
[num
].condition
= expr_clone(exp
, NULL
);