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 * Determine if the instruction at current PC is an instruction that
33 * is a function return.
35 static BOOL
is_at_func_return(void)
39 memory_get_current_pc(&addr
);
40 return be_cpu
->is_function_return(memory_to_linear_addr(&addr
));
43 /***********************************************************************
46 * Set or remove all the breakpoints & watchpoints
48 void break_set_xpoints(BOOL set
)
50 static BOOL last
; /* = 0 = FALSE */
55 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
57 if (set
== last
) return;
60 for (i
= 0; i
< dbg_curr_process
->next_bp
; i
++)
62 if (!bp
[i
].refcount
&& !bp
[i
].enabled
)
65 if (bp
[i
].xpoint_type
== be_xpoint_break
)
68 size
= bp
[i
].w
.len
+ 1;
69 addr
= (void*)memory_to_linear_addr(&bp
[i
].addr
);
72 ret
= be_cpu
->insert_Xpoint(dbg_curr_process
->handle
, &dbg_context
,
73 bp
[i
].xpoint_type
, addr
,
76 ret
= be_cpu
->remove_Xpoint(dbg_curr_process
->handle
, &dbg_context
,
77 bp
[i
].xpoint_type
, addr
,
81 dbg_printf("Invalid address (%p) for breakpoint %d, disabling it\n",
83 bp
[i
].enabled
= FALSE
;
88 /***********************************************************************
91 * Find the breakpoint for a given address. Return the breakpoint
92 * number or -1 if none.
94 static int find_xpoint(const ADDRESS
* addr
, enum be_xpoint_type type
)
97 void* lin
= memory_to_linear_addr(addr
);
98 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
100 for (i
= 0; i
< dbg_curr_process
->next_bp
; i
++)
102 if (bp
[i
].refcount
&& bp
[i
].enabled
&& bp
[i
].xpoint_type
== type
&&
103 memory_to_linear_addr(&bp
[i
].addr
) == lin
)
109 /***********************************************************************
112 * Find an empty slot in BP table to add a new break/watch point
114 static int init_xpoint(int type
, const ADDRESS
* addr
)
117 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
119 for (num
= (dbg_curr_process
->next_bp
< MAX_BREAKPOINTS
) ?
120 dbg_curr_process
->next_bp
++ : 1;
121 num
< MAX_BREAKPOINTS
; num
++)
123 if (bp
[num
].refcount
== 0)
125 bp
[num
].refcount
= 1;
126 bp
[num
].enabled
= TRUE
;
127 bp
[num
].xpoint_type
= type
;
128 bp
[num
].skipcount
= 0;
129 bp
[num
].addr
= *addr
;
134 dbg_printf("Too many bp. Please delete some.\n");
138 /***********************************************************************
141 * Returns the value watched by watch point 'num'.
143 static BOOL
get_watched_value(int num
, LPDWORD val
)
147 if (!dbg_read_memory(memory_to_linear_addr(&dbg_curr_process
->bp
[num
].addr
),
148 buf
, dbg_curr_process
->bp
[num
].w
.len
+ 1))
151 switch (dbg_curr_process
->bp
[num
].w
.len
+ 1)
153 case 4: *val
= *(DWORD
*)buf
; break;
154 case 2: *val
= *(WORD
*)buf
; break;
155 case 1: *val
= *(BYTE
*)buf
; break;
156 default: RaiseException(DEBUG_STATUS_INTERNAL_ERROR
, 0, 0, NULL
);
161 /***********************************************************************
166 BOOL
break_add_break(const ADDRESS
* addr
, BOOL verbose
)
170 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
172 if ((num
= find_xpoint(addr
, be_xpoint_break
)) >= 1)
175 dbg_printf("Breakpoint %d at ", num
);
176 print_address(&bp
[num
].addr
, TRUE
);
177 dbg_printf(" (refcount=%d)\n", bp
[num
].refcount
);
181 if (!dbg_read_memory(memory_to_linear_addr(addr
), &ch
, sizeof(ch
)))
185 dbg_printf("Invalid address ");
186 print_bare_address(addr
);
187 dbg_printf(", can't set breakpoint\n");
192 if ((num
= init_xpoint(be_xpoint_break
, addr
)) == -1)
195 dbg_printf("Breakpoint %d at ", num
);
196 print_address(&bp
[num
].addr
, TRUE
);
202 /***********************************************************************
203 * break_add_break_from_lvalue
207 BOOL
break_add_break_from_lvalue(const struct dbg_lvalue
* lvalue
)
211 addr
.Mode
= AddrModeFlat
;
212 addr
.Offset
= types_extract_as_integer(lvalue
);
214 if (!break_add_break(&addr
, TRUE
))
216 if (!DBG_IVAR(CanDeferOnBPByAddr
))
218 dbg_printf("Invalid address, can't set breakpoint\n"
219 "You can turn on deferring bp by address by setting $CanDeferOnBPByAddr to 1\n");
222 dbg_printf("Unable to add breakpoint, will check again any time a new DLL is loaded\n");
223 dbg_curr_process
->delayed_bp
=
224 dbg_heap_realloc(dbg_curr_process
->delayed_bp
,
225 sizeof(struct dbg_delayed_bp
) * ++dbg_curr_process
->num_delayed_bp
);
227 dbg_curr_process
->delayed_bp
[dbg_curr_process
->num_delayed_bp
- 1].is_symbol
= FALSE
;
228 dbg_curr_process
->delayed_bp
[dbg_curr_process
->num_delayed_bp
- 1].u
.addr
= addr
;
234 /***********************************************************************
235 * break_add_break_from_id
237 * Add a breakpoint from a function name (and eventually a line #)
239 void break_add_break_from_id(const char *name
, int lineno
)
241 struct dbg_lvalue lvalue
;
244 switch (symbol_get_lvalue(name
, lineno
, &lvalue
, TRUE
))
247 break_add_break(&lvalue
.addr
, TRUE
);
251 case sglv_aborted
: /* user aborted symbol lookup */
255 dbg_printf("Unable to add breakpoint, will check again when a new DLL is loaded\n");
256 for (i
= 0; i
< dbg_curr_process
->num_delayed_bp
; i
++)
258 if (dbg_curr_process
->delayed_bp
[i
].is_symbol
&&
259 !strcmp(name
, dbg_curr_process
->delayed_bp
[i
].u
.symbol
.name
) &&
260 lineno
== dbg_curr_process
->delayed_bp
[i
].u
.symbol
.lineno
)
263 dbg_curr_process
->delayed_bp
= dbg_heap_realloc(dbg_curr_process
->delayed_bp
,
264 sizeof(struct dbg_delayed_bp
) * ++dbg_curr_process
->num_delayed_bp
);
266 dbg_curr_process
->delayed_bp
[dbg_curr_process
->num_delayed_bp
- 1].is_symbol
= TRUE
;
267 dbg_curr_process
->delayed_bp
[dbg_curr_process
->num_delayed_bp
- 1].u
.symbol
.name
= strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(name
) + 1), name
);
268 dbg_curr_process
->delayed_bp
[dbg_curr_process
->num_delayed_bp
- 1].u
.symbol
.lineno
= lineno
;
271 /***********************************************************************
272 * break_add_break_from_lineno
274 * Add a breakpoint from a line number in current file
276 void break_add_break_from_lineno(int lineno
)
280 memory_get_current_pc(&addr
);
288 il
.SizeOfStruct
= sizeof(il
);
289 if (!SymGetLineFromAddr(dbg_curr_process
->handle
,
290 (DWORD
)memory_to_linear_addr(&addr
), NULL
, &il
))
292 dbg_printf("Unable to add breakpoint (unknown address)\n");
297 while (SymGetLinePrev(dbg_curr_process
->handle
, &iil
))
299 if (lineno
== iil
.LineNumber
&& !strcmp(il
.FileName
, iil
.FileName
))
301 addr
.Mode
= AddrModeFlat
;
302 addr
.Offset
= iil
.Address
;
308 if (!found
) while (SymGetLineNext(dbg_curr_process
->handle
, &iil
))
310 if (lineno
== iil
.LineNumber
&& !strcmp(il
.FileName
, iil
.FileName
))
312 addr
.Mode
= AddrModeFlat
;
313 addr
.Offset
= iil
.Address
;
320 dbg_printf("Unknown line number\n"
321 "(either out of file, or no code at given line number)\n");
326 break_add_break(&addr
, TRUE
);
329 /***********************************************************************
330 * break_check_delayed_bp
332 * Check is a registered delayed BP is now available.
334 void break_check_delayed_bp(void)
336 struct dbg_lvalue lvalue
;
338 struct dbg_delayed_bp
* dbp
= dbg_curr_process
->delayed_bp
;
340 for (i
= 0; i
< dbg_curr_process
->num_delayed_bp
; i
++)
342 if (dbp
[i
].is_symbol
)
344 if (symbol_get_lvalue(dbp
[i
].u
.symbol
.name
, dbp
[i
].u
.symbol
.lineno
,
345 &lvalue
, TRUE
) != sglv_found
)
347 if (lvalue
.cookie
!= DLV_TARGET
) continue;
350 lvalue
.addr
= dbp
[i
].u
.addr
;
351 WINE_TRACE("trying to add delayed %s-bp\n", dbp
[i
].is_symbol
? "S" : "A");
352 if (!dbp
[i
].is_symbol
)
353 WINE_TRACE("\t%04x:%08lx\n",
354 dbp
[i
].u
.addr
.Segment
, dbp
[i
].u
.addr
.Offset
);
356 WINE_TRACE("\t'%s' @ %d\n",
357 dbp
[i
].u
.symbol
.name
, dbp
[i
].u
.symbol
.lineno
);
359 if (break_add_break(&lvalue
.addr
, FALSE
))
360 memmove(&dbp
[i
], &dbp
[i
+1], (--dbg_curr_process
->num_delayed_bp
- i
) * sizeof(*dbp
));
364 /***********************************************************************
369 void break_add_watch(const struct dbg_lvalue
* lvalue
, BOOL is_write
)
374 num
= init_xpoint((is_write
) ? be_xpoint_watch_write
: be_xpoint_watch_read
,
376 if (num
== -1) return;
378 if (lvalue
->typeid != dbg_itype_none
)
380 if (types_get_info((DWORD
)memory_to_linear_addr(&lvalue
->addr
),
381 lvalue
->typeid, TI_GET_LENGTH
, &l
))
385 case 4: case 2: case 1: break;
387 dbg_printf("Unsupported length (%lu) for watch-points, defaulting to 4\n", l
);
391 else dbg_printf("Cannot get watch size, defaulting to 4\n");
393 dbg_curr_process
->bp
[num
].w
.len
= l
- 1;
395 if (!get_watched_value(num
, &dbg_curr_process
->bp
[num
].w
.oldval
))
397 dbg_printf("Bad address. Watchpoint not set\n");
398 dbg_curr_process
->bp
[num
].refcount
= 0;
401 dbg_printf("Watchpoint %d at ", num
);
402 print_address(&dbg_curr_process
->bp
[num
].addr
, TRUE
);
406 /***********************************************************************
407 * break_add_watch_from_id
409 * Add a watchpoint from a symbol name (and eventually a line #)
411 void break_add_watch_from_id(const char *name
)
413 struct dbg_lvalue lvalue
;
415 switch (symbol_get_lvalue(name
, -1, &lvalue
, TRUE
))
418 break_add_watch(&lvalue
, 1);
421 dbg_printf("Unable to add watchpoint\n");
423 case sglv_aborted
: /* user aborted symbol lookup */
428 /***********************************************************************
429 * break_delete_xpoint
431 * Delete a breakpoint.
433 void break_delete_xpoint(int num
)
435 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
437 if ((num
<= 0) || (num
>= dbg_curr_process
->next_bp
) ||
438 bp
[num
].refcount
== 0)
440 dbg_printf("Invalid breakpoint number %d\n", num
);
444 if (--bp
[num
].refcount
> 0)
447 if (bp
[num
].condition
!= NULL
)
449 expr_free(bp
[num
].condition
);
450 bp
[num
].condition
= NULL
;
453 bp
[num
].enabled
= FALSE
;
454 bp
[num
].refcount
= 0;
455 bp
[num
].skipcount
= 0;
458 static inline BOOL
module_is_container(const IMAGEHLP_MODULE
* wmod_cntnr
,
459 const IMAGEHLP_MODULE
* wmod_child
)
461 return wmod_cntnr
->BaseOfImage
<= wmod_child
->BaseOfImage
&&
462 (DWORD
)wmod_cntnr
->BaseOfImage
+ wmod_cntnr
->ImageSize
>=
463 (DWORD
)wmod_child
->BaseOfImage
+ wmod_child
->ImageSize
;
466 /******************************************************************
467 * break_delete_xpoints_from_module
469 * Remove all Xpoints from module which base is 'base'
471 void break_delete_xpoints_from_module(unsigned long base
)
473 IMAGEHLP_MODULE im
, im_elf
;
476 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
478 /* FIXME: should do it also on the ELF sibbling if any */
479 im
.SizeOfStruct
= sizeof(im
);
480 im_elf
.SizeOfStruct
= sizeof(im_elf
);
481 if (!SymGetModuleInfo(dbg_curr_process
->handle
, base
, &im
)) return;
483 /* try to get in fact the underlying ELF module (if any) */
484 if (SymGetModuleInfo(dbg_curr_process
->handle
, im
.BaseOfImage
- 1, &im_elf
) &&
485 im_elf
.BaseOfImage
<= im
.BaseOfImage
&&
486 (DWORD
)im_elf
.BaseOfImage
+ im_elf
.ImageSize
>= (DWORD
)im
.BaseOfImage
+ im
.ImageSize
)
489 for (i
= 0; i
< dbg_curr_process
->next_bp
; i
++)
491 linear
= (DWORD
)memory_to_linear_addr(&bp
[i
].addr
);
492 if (bp
[i
].refcount
&& bp
[i
].enabled
&&
493 im
.BaseOfImage
<= linear
&& linear
< im
.BaseOfImage
+ im
.ImageSize
)
495 break_delete_xpoint(i
);
500 /***********************************************************************
501 * break_enable_xpoint
503 * Enable or disable a break point.
505 void break_enable_xpoint(int num
, BOOL enable
)
507 if ((num
<= 0) || (num
>= dbg_curr_process
->next_bp
) ||
508 dbg_curr_process
->bp
[num
].refcount
== 0)
510 dbg_printf("Invalid breakpoint number %d\n", num
);
513 dbg_curr_process
->bp
[num
].enabled
= (enable
) ? TRUE
: FALSE
;
514 dbg_curr_process
->bp
[num
].skipcount
= 0;
518 /***********************************************************************
519 * find_triggered_watch
521 * Lookup the watchpoints to see if one has been triggered
522 * Return >= (watch point index) if one is found and *oldval is set to
523 * the value watched before the TRAP
524 * Return -1 if none found (*oldval is undetermined)
526 * Unfortunately, Linux does *NOT* (A REAL PITA) report with ptrace
527 * the DR6 register value, so we have to look with our own need the
531 static int find_triggered_watch(LPDWORD oldval
)
535 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
537 /* Method 1 => get triggered watchpoint from context (doesn't work on Linux
538 * 2.2.x). This should be fixed in >= 2.2.16
540 for (i
= 0; i
< dbg_curr_process
->next_bp
; i
++)
544 if (bp
[i
].refcount
&& bp
[i
].enabled
&& bp
[i
].xpoint_type
!= be_xpoint_break
&&
545 (be_cpu
->is_watchpoint_set(&dbg_context
, bp
[i
].info
)))
547 be_cpu
->clear_watchpoint(&dbg_context
, bp
[i
].info
);
549 *oldval
= bp
[i
].w
.oldval
;
550 if (get_watched_value(i
, &val
))
552 bp
[i
].w
.oldval
= val
;
558 /* Method 1 failed, trying method 2 */
560 /* Method 2 => check if value has changed among registered watchpoints
561 * this really sucks, but this is how gdb 4.18 works on my linux box
564 for (i
= 0; i
< dbg_curr_process
->next_bp
; i
++)
568 if (bp
[i
].refcount
&& bp
[i
].enabled
&& bp
[i
].xpoint_type
!= be_xpoint_break
&&
569 get_watched_value(i
, &val
))
571 *oldval
= bp
[i
].w
.oldval
;
574 be_cpu
->clear_watchpoint(&dbg_context
, bp
[i
].info
);
575 bp
[i
].w
.oldval
= val
;
577 /* cannot break, because two watch points may have been triggered on
579 * only one will be reported to the user (FIXME ?)
587 /***********************************************************************
590 * Display break & watch points information.
592 void break_info(void)
595 int nbp
= 0, nwp
= 0;
596 struct dbg_delayed_bp
* dbp
= dbg_curr_process
->delayed_bp
;
597 struct dbg_breakpoint
* bp
= dbg_curr_process
->bp
;
599 for (i
= 1; i
< dbg_curr_process
->next_bp
; i
++)
603 if (bp
[i
].xpoint_type
== be_xpoint_break
) nbp
++; else nwp
++;
609 dbg_printf("Breakpoints:\n");
610 for (i
= 1; i
< dbg_curr_process
->next_bp
; i
++)
612 if (!bp
[i
].refcount
|| bp
[i
].xpoint_type
!= be_xpoint_break
)
614 dbg_printf("%d: %c ", i
, bp
[i
].enabled
? 'y' : 'n');
615 print_address(&bp
[i
].addr
, TRUE
);
616 dbg_printf(" (%u)\n", bp
[i
].refcount
);
617 if (bp
[i
].condition
!= NULL
)
619 dbg_printf("\t\tstop when ");
620 expr_print(bp
[i
].condition
);
625 else dbg_printf("No breakpoints\n");
628 dbg_printf("Watchpoints:\n");
629 for (i
= 1; i
< dbg_curr_process
->next_bp
; i
++)
631 if (!bp
[i
].refcount
|| bp
[i
].xpoint_type
== be_xpoint_break
)
633 dbg_printf("%d: %c ", i
, bp
[i
].enabled
? 'y' : 'n');
634 print_address(&bp
[i
].addr
, TRUE
);
635 dbg_printf(" on %d byte%s (%c)\n",
636 bp
[i
].w
.len
+ 1, bp
[i
].w
.len
> 0 ? "s" : "",
637 bp
[i
].xpoint_type
== be_xpoint_watch_write
? 'W' : 'R');
638 if (bp
[i
].condition
!= NULL
)
640 dbg_printf("\t\tstop when ");
641 expr_print(bp
[i
].condition
);
646 else dbg_printf("No watchpoints\n");
647 if (dbg_curr_process
->num_delayed_bp
)
649 dbg_printf("Delayed breakpoints:\n");
650 for (i
= 0; i
< dbg_curr_process
->num_delayed_bp
; i
++)
652 if (dbp
[i
].is_symbol
)
654 dbg_printf("%d: %s", i
, dbp
[i
].u
.symbol
.name
);
655 if (dbp
[i
].u
.symbol
.lineno
!= -1)
656 dbg_printf(" at line %u", dbp
[i
].u
.symbol
.lineno
);
660 dbg_printf("%d: ", i
);
661 print_address(&dbp
[i
].u
.addr
, FALSE
);
668 /***********************************************************************
671 * Check whether or not the condition (bp / skipcount) of a break/watch
674 static BOOL
should_stop(int bpnum
)
676 struct dbg_breakpoint
* bp
= &dbg_curr_process
->bp
[bpnum
];
678 if (bp
->condition
!= NULL
)
680 struct dbg_lvalue lvalue
= expr_eval(bp
->condition
);
682 if (lvalue
.typeid == dbg_itype_none
)
685 * Something wrong - unable to evaluate this expression.
687 dbg_printf("Unable to evaluate expression ");
688 expr_print(bp
->condition
);
689 dbg_printf("\nTurning off condition\n");
690 break_add_condition(bpnum
, NULL
);
692 else if (!types_extract_as_integer(&lvalue
))
698 if (bp
->skipcount
> 0) bp
->skipcount
--;
699 return bp
->skipcount
== 0;
702 /***********************************************************************
703 * break_should_continue
705 * Determine if we should continue execution after a SIGTRAP signal when
706 * executing in the given mode.
708 BOOL
break_should_continue(ADDRESS
* addr
, DWORD code
, int* count
)
713 enum dbg_exec_mode mode
= dbg_curr_thread
->exec_mode
;
715 /* If not single-stepping, back up to the break instruction */
716 if (code
== EXCEPTION_BREAKPOINT
)
717 addr
->Offset
+= be_cpu
->adjust_pc_for_break(&dbg_context
, TRUE
);
719 bpnum
= find_xpoint(addr
, be_xpoint_break
);
720 dbg_curr_process
->bp
[0].enabled
= FALSE
; /* disable the step-over breakpoint */
724 if (!should_stop(bpnum
)) return TRUE
;
726 dbg_printf("Stopped on breakpoint %d at ", bpnum
);
727 print_address(&dbg_curr_process
->bp
[bpnum
].addr
, TRUE
);
729 source_list_from_addr(addr
, 0);
733 wpnum
= find_triggered_watch(&oldval
);
736 /* If not single-stepping, do not back up over the break instruction */
737 if (code
== EXCEPTION_BREAKPOINT
)
738 addr
->Offset
+= be_cpu
->adjust_pc_for_break(&dbg_context
, FALSE
);
740 if (!should_stop(wpnum
)) return TRUE
;
742 dbg_printf("Stopped on watchpoint %d at ", wpnum
);
743 print_address(addr
, TRUE
);
744 dbg_printf(" values: old=%lu new=%lu\n",
745 oldval
, dbg_curr_process
->bp
[wpnum
].w
.oldval
);
746 source_list_from_addr(addr
, 0);
751 * If our mode indicates that we are stepping line numbers,
752 * get the current function, and figure out if we are exactly
753 * on a line number or not.
755 if (mode
== dbg_exec_step_over_line
|| mode
== dbg_exec_step_into_line
)
757 if (symbol_get_function_line_status(addr
) == dbg_on_a_line_number
)
762 else if (mode
== dbg_exec_step_over_insn
|| mode
== dbg_exec_step_into_insn
)
767 if (*count
> 0 || mode
== dbg_exec_finish
)
770 * We still need to execute more instructions.
776 * If we are about to stop, then print out the source line if we
779 if (mode
!= dbg_exec_cont
&& mode
!= dbg_exec_finish
)
780 source_list_from_addr(addr
, 0);
782 /* If there's no breakpoint and we are not single-stepping, then
783 * either we must have encountered a break insn in the Windows program
784 * or someone is trying to stop us
786 if (bpnum
== -1 && code
== EXCEPTION_BREAKPOINT
)
788 addr
->Offset
+= be_cpu
->adjust_pc_for_break(&dbg_context
, FALSE
);
792 /* no breakpoint, continue if in continuous mode */
793 return mode
== dbg_exec_cont
|| mode
== dbg_exec_finish
;
796 /***********************************************************************
797 * break_suspend_execution
799 * Remove all bp before entering the debug loop
801 void break_suspend_execution(void)
803 break_set_xpoints(FALSE
);
804 dbg_curr_process
->bp
[0] = dbg_curr_thread
->step_over_bp
;
807 /***********************************************************************
808 * break_restart_execution
810 * Set the bp to the correct state to restart execution
813 void break_restart_execution(int count
)
817 enum dbg_line_status status
;
818 enum dbg_exec_mode mode
, ret_mode
;
821 memory_get_current_pc(&addr
);
824 * This is the mode we will be running in after we finish. We would like
825 * to be able to modify this in certain cases.
827 ret_mode
= mode
= dbg_curr_thread
->exec_mode
;
829 bp
= find_xpoint(&addr
, be_xpoint_break
);
830 if (bp
!= -1 && bp
!= 0)
833 * If we have set a new value, then save it in the BP number.
835 if (count
!= 0 && mode
== dbg_exec_cont
)
837 dbg_curr_process
->bp
[bp
].skipcount
= count
;
839 mode
= dbg_exec_step_into_insn
; /* If there's a breakpoint, skip it */
841 else if (mode
== dbg_exec_cont
&& count
> 1)
843 dbg_printf("Not stopped at any breakpoint; argument ignored.\n");
846 if (mode
== dbg_exec_finish
&& is_at_func_return())
848 mode
= ret_mode
= dbg_exec_step_into_insn
;
852 * See if the function we are stepping into has debug info
853 * and line numbers. If not, then we step over it instead.
854 * FIXME - we need to check for things like thunks or trampolines,
855 * as the actual function may in fact have debug info.
857 if (be_cpu
->is_function_call(memory_to_linear_addr(&addr
), &callee
))
859 status
= symbol_get_function_line_status(&callee
);
861 /* FIXME: we need to get the thunk type */
863 * Anytime we have a trampoline, step over it.
865 if ((mode
== EXEC_STEP_OVER
|| mode
== EXEC_STEPI_OVER
)
866 && status
== dbg_in_a_thunk
)
868 WINE_WARN("Not stepping into trampoline at %p (no lines)\n",
869 memory_to_linear_addr(&callee
));
870 mode
= EXEC_STEP_OVER_TRAMPOLINE
;
873 if (mode
== dbg_exec_step_into_line
&& status
== dbg_no_line_info
)
875 WINE_WARN("Not stepping into function at %p (no lines)\n",
876 memory_to_linear_addr(&callee
));
877 mode
= dbg_exec_step_over_line
;
881 if (mode
== dbg_exec_step_into_line
&&
882 symbol_get_function_line_status(&addr
) == dbg_no_line_info
)
884 dbg_printf("Single stepping until exit from function, \n"
885 "which has no line number information.\n");
886 ret_mode
= mode
= dbg_exec_finish
;
891 case dbg_exec_cont
: /* Continuous execution */
892 be_cpu
->single_step(&dbg_context
, FALSE
);
893 break_set_xpoints(TRUE
);
897 case EXEC_STEP_OVER_TRAMPOLINE
:
899 * This is the means by which we step over our conversion stubs
900 * in callfrom*.s and callto*.s. We dig the appropriate address
901 * off the stack, and we set the breakpoint there instead of the
902 * address just after the call.
904 be_cpu
->get_addr(dbg_curr_thread
->handle
, &dbg_context
,
905 be_cpu_addr_stack
, &addr
);
906 /* FIXME: we assume stack grows as on a i386 */
907 addr
.Offset
+= 2 * sizeof(unsigned int);
908 dbg_read_memory(memory_to_linear_addr(&addr
),
909 &addr
.Offset
, sizeof(addr
.Offset
));
910 dbg_curr_process
->bp
[0].addr
= addr
;
911 dbg_curr_process
->bp
[0].enabled
= TRUE
;
912 dbg_curr_process
->bp
[0].refcount
= 1;
913 dbg_curr_process
->bp
[0].skipcount
= 0;
914 be_cpu
->single_step(&dbg_context
, FALSE
);
915 break_set_xpoints(TRUE
);
919 case dbg_exec_finish
:
920 case dbg_exec_step_over_insn
: /* Stepping over a call */
921 case dbg_exec_step_over_line
: /* Stepping over a call */
922 if (be_cpu
->is_step_over_insn(memory_to_linear_addr(&addr
)))
924 be_cpu
->single_step(&dbg_context
, FALSE
);
925 be_cpu
->disasm_one_insn(&addr
, FALSE
);
926 dbg_curr_process
->bp
[0].addr
= addr
;
927 dbg_curr_process
->bp
[0].enabled
= TRUE
;
928 dbg_curr_process
->bp
[0].refcount
= 1;
929 dbg_curr_process
->bp
[0].skipcount
= 0;
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
);