Replace ../include/wait.h with gdb_wait.h.
[deliverable/binutils-gdb.git] / gdb / win32-nat.c
1 /* Target-vector operations for controlling win32 child processes, for GDB.
2 Copyright 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
3 Contributed by Cygnus Support.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without eve nthe implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA.
21 */
22
23 /* by Steve Chamberlain, sac@cygnus.com */
24
25 /* We assume we're being built with and will be used for cygwin. */
26
27 #include "defs.h"
28 #include "frame.h" /* required by inferior.h */
29 #include "inferior.h"
30 #include "target.h"
31 #include "gdb_wait.h"
32 #include "gdbcore.h"
33 #include "command.h"
34 #include <signal.h>
35 #include <sys/types.h>
36 #include <fcntl.h>
37 #include <stdlib.h>
38
39 #ifdef _MSC_VER
40 #include "windefs.h"
41 #else /* other WIN32 compiler */
42 #include <windows.h>
43 #include <imagehlp.h>
44 #endif
45
46 #include "buildsym.h"
47 #include "symfile.h"
48 #include "objfiles.h"
49 #include "gdb_string.h"
50 #include "gdbthread.h"
51 #include "gdbcmd.h"
52 #include <sys/param.h>
53 #include <unistd.h>
54
55 /* The ui's event loop. */
56 extern int (*ui_loop_hook) PARAMS ((int signo));
57
58 /* If we're not using the old Cygwin header file set, define the
59 following which never should have been in the generic Win32 API
60 headers in the first place since they were our own invention... */
61 #ifndef _GNU_H_WINDOWS_H
62 #define FLAG_TRACE_BIT 0x100
63 #define CONTEXT_DEBUGGER (CONTEXT_FULL | CONTEXT_FLOATING_POINT)
64 #endif
65
66 /* The string sent by cygwin when it processes a signal.
67 FIXME: This should be in a cygwin include file. */
68 #define CYGWIN_SIGNAL_STRING "cygwin: signal"
69
70 #define CHECK(x) check (x, __FILE__,__LINE__)
71 #define DEBUG_EXEC(x) if (debug_exec) printf x
72 #define DEBUG_EVENTS(x) if (debug_events) printf x
73 #define DEBUG_MEM(x) if (debug_memory) printf x
74 #define DEBUG_EXCEPT(x) if (debug_exceptions) printf x
75
76 /* Forward declaration */
77 extern struct target_ops child_ops;
78
79 static void child_stop PARAMS ((void));
80 static int win32_child_thread_alive PARAMS ((int));
81 void child_kill_inferior PARAMS ((void));
82
83 /* Thread information structure used to track information that is
84 not available in gdb's thread structure. */
85 typedef struct thread_info_struct
86 {
87 struct thread_info_struct *next;
88 DWORD id;
89 HANDLE h;
90 char *name;
91 int suspend_count;
92 CONTEXT context;
93 STACKFRAME sf;
94 } thread_info;
95
96 static thread_info thread_head = {NULL};
97
98 /* The saved state for a continue after breaking back to gdb. */
99 static DWORD continue_status;
100
101 /* The process and thread handles for the above context. */
102
103 static DEBUG_EVENT current_event; /* The current debug event from
104 WaitForDebugEvent */
105 static HANDLE current_process_handle; /* Currently executing process */
106 static thread_info *current_thread; /* Info on currently selected thread */
107 static DWORD main_thread_id; /* Thread ID of the main thread */
108
109 /* Counts of things. */
110 static int exception_count = 0;
111 static int event_count = 0;
112
113 /* User options. */
114 static int new_console = 0;
115 static int new_group = 1;
116 static int debug_exec = 0; /* show execution */
117 static int debug_events = 0; /* show events from kernel */
118 static int debug_memory = 0; /* show target memory accesses */
119 static int debug_exceptions = 0; /* show target exceptions */
120
121 /* This vector maps GDB's idea of a register's number into an address
122 in the win32 exception context vector.
123
124 It also contains the bit mask needed to load the register in question.
125
126 One day we could read a reg, we could inspect the context we
127 already have loaded, if it doesn't have the bit set that we need,
128 we read that set of registers in using GetThreadContext. If the
129 context already contains what we need, we just unpack it. Then to
130 write a register, first we have to ensure that the context contains
131 the other regs of the group, and then we copy the info in and set
132 out bit. */
133
134 #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
135 static const int mappings[] =
136 {
137 context_offset (Eax),
138 context_offset (Ecx),
139 context_offset (Edx),
140 context_offset (Ebx),
141 context_offset (Esp),
142 context_offset (Ebp),
143 context_offset (Esi),
144 context_offset (Edi),
145 context_offset (Eip),
146 context_offset (EFlags),
147 context_offset (SegCs),
148 context_offset (SegSs),
149 context_offset (SegDs),
150 context_offset (SegEs),
151 context_offset (SegFs),
152 context_offset (SegGs),
153 context_offset (FloatSave.RegisterArea[0 * 10]),
154 context_offset (FloatSave.RegisterArea[1 * 10]),
155 context_offset (FloatSave.RegisterArea[2 * 10]),
156 context_offset (FloatSave.RegisterArea[3 * 10]),
157 context_offset (FloatSave.RegisterArea[4 * 10]),
158 context_offset (FloatSave.RegisterArea[5 * 10]),
159 context_offset (FloatSave.RegisterArea[6 * 10]),
160 context_offset (FloatSave.RegisterArea[7 * 10]),
161 context_offset (FloatSave.ControlWord),
162 context_offset (FloatSave.StatusWord),
163 context_offset (FloatSave.TagWord),
164 context_offset (FloatSave.ErrorSelector),
165 context_offset (FloatSave.ErrorOffset),
166 context_offset (FloatSave.DataSelector),
167 context_offset (FloatSave.DataOffset),
168 context_offset (FloatSave.ErrorSelector)
169 };
170
171 #undef context_offset
172
173 /* This vector maps the target's idea of an exception (extracted
174 from the DEBUG_EVENT structure) to GDB's idea. */
175
176 struct xlate_exception
177 {
178 int them;
179 enum target_signal us;
180 };
181
182 static const struct xlate_exception
183 xlate[] =
184 {
185 {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV},
186 {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV},
187 {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP},
188 {DBG_CONTROL_C, TARGET_SIGNAL_INT},
189 {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP},
190 {-1, -1}};
191
192 /* Find a thread record given a thread id.
193 If get_context then also retrieve the context for this
194 thread. */
195 static thread_info *
196 thread_rec (DWORD id, int get_context)
197 {
198 thread_info *th;
199
200 for (th = &thread_head; (th = th->next) != NULL;)
201 if (th->id == id)
202 {
203 if (!th->suspend_count && get_context)
204 {
205 if (get_context > 0)
206 th->suspend_count = SuspendThread (th->h) + 1;
207 else if (get_context < 0)
208 th->suspend_count = -1;
209
210 th->context.ContextFlags = CONTEXT_DEBUGGER;
211 GetThreadContext (th->h, &th->context);
212 }
213 return th;
214 }
215
216 return NULL;
217 }
218
219 /* Add a thread to the thread list */
220 static thread_info *
221 child_add_thread (DWORD id, HANDLE h)
222 {
223 thread_info *th;
224
225 if ((th = thread_rec (id, FALSE)))
226 return th;
227
228 th = (thread_info *) xmalloc (sizeof (*th));
229 memset (th, 0, sizeof (*th));
230 th->id = id;
231 th->h = h;
232 th->next = thread_head.next;
233 thread_head.next = th;
234 add_thread (id);
235 return th;
236 }
237
238 /* Clear out any old thread list and reintialize it to a
239 pristine state. */
240 static void
241 child_init_thread_list ()
242 {
243 thread_info *th = &thread_head;
244
245 DEBUG_EVENTS (("gdb: child_init_thread_list\n"));
246 init_thread_list ();
247 while (th->next != NULL)
248 {
249 thread_info *here = th->next;
250 th->next = here->next;
251 (void) CloseHandle (here->h);
252 free (here);
253 }
254 }
255
256 /* Delete a thread from the list of threads */
257 static void
258 child_delete_thread (DWORD id)
259 {
260 thread_info *th;
261
262 if (info_verbose)
263 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (id));
264 delete_thread (id);
265
266 for (th = &thread_head;
267 th->next != NULL && th->next->id != id;
268 th = th->next)
269 continue;
270
271 if (th->next != NULL)
272 {
273 thread_info *here = th->next;
274 th->next = here->next;
275 CloseHandle (here->h);
276 free (here);
277 }
278 }
279
280 static void
281 check (BOOL ok, const char *file, int line)
282 {
283 if (!ok)
284 printf_filtered ("error return %s:%d was %d\n", file, line, GetLastError ());
285 }
286
287 static void
288 do_child_fetch_inferior_registers (int r)
289 {
290 char *context_offset = ((char *) &current_thread->context) + mappings[r];
291 long l;
292 if (r == FCS_REGNUM)
293 {
294 l = *((long *)context_offset) & 0xffff;
295 supply_register (r, (char *) &l);
296 }
297 else if (r == FOP_REGNUM)
298 {
299 l = (*((long *)context_offset) >> 16) & ((1 << 11) - 1);
300 supply_register (r, (char *) &l);
301 }
302 else if (r >= 0)
303 supply_register (r, context_offset);
304 else
305 {
306 for (r = 0; r < NUM_REGS; r++)
307 do_child_fetch_inferior_registers (r);
308 }
309 }
310
311 static void
312 child_fetch_inferior_registers (int r)
313 {
314 current_thread = thread_rec (inferior_pid, TRUE);
315 do_child_fetch_inferior_registers (r);
316 }
317
318 static void
319 do_child_store_inferior_registers (int r)
320 {
321 if (r >= 0)
322 read_register_gen (r, ((char *) &current_thread->context) + mappings[r]);
323 else
324 {
325 for (r = 0; r < NUM_REGS; r++)
326 do_child_store_inferior_registers (r);
327 }
328 }
329
330 /* Store a new register value into the current thread context */
331 static void
332 child_store_inferior_registers (int r)
333 {
334 current_thread = thread_rec (inferior_pid, TRUE);
335 do_child_store_inferior_registers (r);
336 }
337
338 #include <psapi.h>
339 static int psapi_loaded = 0;
340 static HMODULE psapi_module_handle = NULL;
341 static BOOL WINAPI (*psapi_EnumProcessModules)(HANDLE, HMODULE*, DWORD, LPDWORD)= NULL;
342 static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, DWORD)= NULL;
343 static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, DWORD)= NULL;
344
345 int psapi_get_dll_name (DWORD BaseAddress, char *dll_name_ret)
346 {
347 DWORD len;
348 MODULEINFO mi;
349 int i;
350 HMODULE dh_buf [ 1 ];
351 HMODULE* DllHandle = dh_buf;
352 DWORD cbNeeded;
353 BOOL ok;
354
355 if (!psapi_loaded ||
356 psapi_EnumProcessModules == NULL ||
357 psapi_GetModuleInformation == NULL ||
358 psapi_GetModuleFileNameExA == NULL)
359 {
360 if (psapi_loaded)goto failed;
361 psapi_loaded = 1;
362 psapi_module_handle = LoadLibrary ("psapi.dll");
363 if (!psapi_module_handle)
364 {
365 /* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ());*/
366 goto failed;
367 }
368 psapi_EnumProcessModules = GetProcAddress (psapi_module_handle, "EnumProcessModules" );
369 psapi_GetModuleInformation = GetProcAddress (psapi_module_handle, "GetModuleInformation");
370 psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle,
371 "GetModuleFileNameExA");
372 if (psapi_EnumProcessModules == NULL ||
373 psapi_GetModuleInformation == NULL ||
374 psapi_GetModuleFileNameExA == NULL)
375 goto failed;
376 }
377
378 cbNeeded = 0;
379 ok = (*psapi_EnumProcessModules) (current_process_handle,
380 DllHandle,
381 sizeof (HMODULE),
382 &cbNeeded);
383
384 if (!ok || !cbNeeded)
385 goto failed;
386
387 DllHandle = (HMODULE*) alloca (cbNeeded);
388 if (!DllHandle)
389 goto failed;
390
391 ok = (*psapi_EnumProcessModules) (current_process_handle,
392 DllHandle,
393 cbNeeded,
394 &cbNeeded);
395 if (!ok)
396 goto failed;
397
398 for (i = 0; i < cbNeeded / sizeof (HMODULE); i++)
399 {
400 if (!(*psapi_GetModuleInformation) (current_process_handle,
401 DllHandle [i],
402 &mi,
403 sizeof (mi)))
404 error ("Can't get module info");
405
406 len = (*psapi_GetModuleFileNameExA) (current_process_handle,
407 DllHandle [i],
408 dll_name_ret,
409 MAX_PATH);
410 if (len == 0)
411 error ("Error getting dll name: %u\n", GetLastError ());
412
413 if ((DWORD) (mi.lpBaseOfDll) == BaseAddress)
414 return 1;
415 }
416
417 failed:
418 dll_name_ret[0] = '\0';
419 return 0;
420 }
421
422 /* Wait for child to do something. Return pid of child, or -1 in case
423 of error; store status through argument pointer OURSTATUS. */
424
425 static int
426 handle_load_dll (PTR dummy)
427 {
428 LOAD_DLL_DEBUG_INFO *event = &current_event.u.LoadDll;
429 DWORD dll_name_ptr;
430 DWORD done;
431 char dll_buf[MAX_PATH + 1];
432 char *p, *dll_name = NULL;
433 struct objfile *objfile;
434 MEMORY_BASIC_INFORMATION minfo;
435 struct section_addr_info section_addrs;
436
437 memset (&section_addrs, 0, sizeof (section_addrs));
438 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
439
440 if (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf))
441 dll_buf[0] = dll_buf[sizeof(dll_buf) - 1] = '\0';
442
443 dll_name = dll_buf;
444
445 /* Attempt to read the name of the dll that was detected.
446 This is documented to work only when actively debugging
447 a program. It will not work for attached processes. */
448 if (dll_name == NULL || *dll_name == '\0')
449 {
450 int size = event->fUnicode ? sizeof (WCHAR) : sizeof (char);
451 int len = 0;
452 char b[2];
453
454 ReadProcessMemory (current_process_handle,
455 (LPCVOID) event->lpImageName,
456 (char *) &dll_name_ptr,
457 sizeof (dll_name_ptr), &done);
458
459 /* See if we could read the address of a string, and that the
460 address isn't null. */
461
462 if (done != sizeof (dll_name_ptr) || !dll_name_ptr)
463 return 1;
464
465 do
466 {
467 ReadProcessMemory (current_process_handle,
468 (LPCVOID) (dll_name_ptr + len * size),
469 &b,
470 size,
471 &done);
472 len++;
473 }
474 while ((b[0] != 0 || b[size - 1] != 0) && done == size);
475
476 dll_name = alloca (len);
477
478 if (event->fUnicode)
479 {
480 WCHAR *unicode_dll_name = (WCHAR *) alloca (len * sizeof (WCHAR));
481 ReadProcessMemory (current_process_handle,
482 (LPCVOID) dll_name_ptr,
483 unicode_dll_name,
484 len * sizeof (WCHAR),
485 &done);
486
487 WideCharToMultiByte (CP_ACP, 0,
488 unicode_dll_name, len,
489 dll_name, len, 0, 0);
490 }
491 else
492 {
493 ReadProcessMemory (current_process_handle,
494 (LPCVOID) dll_name_ptr,
495 dll_name,
496 len,
497 &done);
498 }
499 }
500
501 if (!dll_name)
502 return 1;
503
504 while ((p = strchr (dll_name, '\\')))
505 *p = '/';
506
507 /* The symbols in a dll are offset by 0x1000, which is the
508 the offset from 0 of the first byte in an image - because
509 of the file header and the section alignment.
510
511 FIXME: Is this the real reason that we need the 0x1000 ? */
512
513 printf_unfiltered ("%x:%s", event->lpBaseOfDll, dll_name);
514 section_addrs.text_addr = (int) event->lpBaseOfDll + 0x1000;
515 symbol_file_add (dll_name, 0, &section_addrs, 0, OBJF_SHARED);
516 printf_unfiltered ("\n");
517
518 return 1;
519 }
520
521 /* Handle DEBUG_STRING output from child process.
522 Cygwin prepends its messages with a "cygwin:". Interpret this as
523 a Cygwin signal. Otherwise just print the string as a warning. */
524 static int
525 handle_output_debug_string (struct target_waitstatus *ourstatus)
526 {
527 char *s;
528 int gotasig = FALSE;
529
530 if (!target_read_string
531 ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0)
532 || !s || !*s)
533 return gotasig;
534
535 if (strncmp (s, CYGWIN_SIGNAL_STRING, sizeof (CYGWIN_SIGNAL_STRING) - 1) != 0)
536 {
537 if (strncmp (s, "cYg", 3) != 0)
538 warning (s);
539 }
540 else
541 {
542 char *p;
543 int sig = strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0);
544 gotasig = target_signal_from_host (sig);
545 ourstatus->value.sig = gotasig;
546 if (gotasig)
547 ourstatus->kind = TARGET_WAITKIND_STOPPED;
548 }
549
550 free (s);
551 return gotasig;
552 }
553
554 static int
555 handle_exception (struct target_waitstatus *ourstatus)
556 {
557 int i;
558 int done = 0;
559 thread_info *th;
560
561 ourstatus->kind = TARGET_WAITKIND_STOPPED;
562
563 /* Record the context of the current thread */
564 th = thread_rec (current_event.dwThreadId, -1);
565
566 switch (current_event.u.Exception.ExceptionRecord.ExceptionCode)
567 {
568 case EXCEPTION_ACCESS_VIOLATION:
569 DEBUG_EXCEPT (("gdb: Target exception ACCESS_VIOLATION at 0x%08x\n",
570 current_event.u.Exception.ExceptionRecord.ExceptionAddress));
571 ourstatus->value.sig = TARGET_SIGNAL_SEGV;
572 continue_status = DBG_EXCEPTION_NOT_HANDLED;
573 break;
574 case STATUS_FLOAT_UNDERFLOW:
575 case STATUS_FLOAT_DIVIDE_BY_ZERO:
576 case STATUS_FLOAT_OVERFLOW:
577 case STATUS_INTEGER_DIVIDE_BY_ZERO:
578 DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08x\n",
579 current_event.u.Exception.ExceptionRecord.ExceptionAddress));
580 ourstatus->value.sig = TARGET_SIGNAL_FPE;
581 continue_status = DBG_EXCEPTION_NOT_HANDLED;
582 break;
583 case STATUS_STACK_OVERFLOW:
584 DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08x\n",
585 current_event.u.Exception.ExceptionRecord.ExceptionAddress));
586 ourstatus->value.sig = TARGET_SIGNAL_SEGV;
587 continue_status = DBG_EXCEPTION_NOT_HANDLED;
588 break;
589 case EXCEPTION_BREAKPOINT:
590 DEBUG_EXCEPT (("gdb: Target exception BREAKPOINT at 0x%08x\n",
591 current_event.u.Exception.ExceptionRecord.ExceptionAddress));
592 ourstatus->value.sig = TARGET_SIGNAL_TRAP;
593 break;
594 case DBG_CONTROL_C:
595 DEBUG_EXCEPT (("gdb: Target exception CONTROL_C at 0x%08x\n",
596 current_event.u.Exception.ExceptionRecord.ExceptionAddress));
597 ourstatus->value.sig = TARGET_SIGNAL_INT;
598 continue_status = DBG_EXCEPTION_NOT_HANDLED;
599 break;
600 case EXCEPTION_SINGLE_STEP:
601 DEBUG_EXCEPT (("gdb: Target exception SINGLE_STEP at 0x%08x\n",
602 current_event.u.Exception.ExceptionRecord.ExceptionAddress));
603 ourstatus->value.sig = TARGET_SIGNAL_TRAP;
604 break;
605 default:
606 /* This may be a structured exception handling exception. In
607 that case, we want to let the program try to handle it, and
608 only break if we see the exception a second time.
609 if (current_event.u.Exception.dwFirstChance)
610
611 return 0;
612 */
613
614 printf_unfiltered ("gdb: unknown target exception 0x%08x at 0x%08x\n",
615 current_event.u.Exception.ExceptionRecord.ExceptionCode,
616 current_event.u.Exception.ExceptionRecord.ExceptionAddress);
617 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
618 continue_status = DBG_EXCEPTION_NOT_HANDLED;
619 break;
620 }
621 exception_count++;
622 return 1;
623 }
624
625 /* Resume all artificially suspended threads if we are continuing
626 execution */
627 static BOOL
628 child_continue (int id)
629 {
630 int i;
631 thread_info *th;
632 BOOL res;
633
634 DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=%d, DBG_CONTINUE);\n",
635 current_event.dwProcessId, current_event.dwThreadId));
636 res = ContinueDebugEvent (current_event.dwProcessId,
637 current_event.dwThreadId,
638 continue_status);
639 continue_status = 0;
640 if (res)
641 for (th = &thread_head; (th = th->next) != NULL;)
642 if (((id == -1) || (id == th->id)) && th->suspend_count)
643 {
644 for (i = 0; i < th->suspend_count; i++)
645 (void) ResumeThread (th->h);
646 th->suspend_count = 0;
647 }
648
649 return res;
650 }
651
652 static int
653 get_child_debug_event (int pid, struct target_waitstatus *ourstatus,
654 DWORD *event_code, int *retval)
655 {
656 BOOL debug_event;
657 int breakout = 1;
658
659 if (!(debug_event = WaitForDebugEvent (&current_event, 20)))
660 {
661 breakout = *retval = *event_code = 0;
662 goto out;
663 }
664
665 event_count++;
666 continue_status = DBG_CONTINUE;
667 *retval = 0;
668
669 switch (*event_code = current_event.dwDebugEventCode)
670 {
671 case CREATE_THREAD_DEBUG_EVENT:
672 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n",
673 (unsigned) current_event.dwProcessId,
674 (unsigned) current_event.dwThreadId,
675 "CREATE_THREAD_DEBUG_EVENT"));
676 /* Record the existence of this thread */
677 child_add_thread (current_event.dwThreadId,
678 current_event.u.CreateThread.hThread);
679 if (info_verbose)
680 printf_unfiltered ("[New %s]\n",
681 target_pid_to_str (current_event.dwThreadId));
682 break;
683
684 case EXIT_THREAD_DEBUG_EVENT:
685 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
686 (unsigned) current_event.dwProcessId,
687 (unsigned) current_event.dwThreadId,
688 "EXIT_THREAD_DEBUG_EVENT"));
689 child_delete_thread (current_event.dwThreadId);
690 break;
691
692 case CREATE_PROCESS_DEBUG_EVENT:
693 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
694 (unsigned) current_event.dwProcessId,
695 (unsigned) current_event.dwThreadId,
696 "CREATE_PROCESS_DEBUG_EVENT"));
697 current_process_handle = current_event.u.CreateProcessInfo.hProcess;
698
699 main_thread_id = inferior_pid = current_event.dwThreadId;
700 /* Add the main thread */
701 current_thread = child_add_thread (inferior_pid,
702 current_event.u.CreateProcessInfo.hThread);
703 break;
704
705 case EXIT_PROCESS_DEBUG_EVENT:
706 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
707 (unsigned) current_event.dwProcessId,
708 (unsigned) current_event.dwThreadId,
709 "EXIT_PROCESS_DEBUG_EVENT"));
710 ourstatus->kind = TARGET_WAITKIND_EXITED;
711 ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
712 CloseHandle (current_process_handle);
713 *retval = current_event.dwProcessId;
714 goto out;
715
716 case LOAD_DLL_DEBUG_EVENT:
717 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
718 (unsigned) current_event.dwProcessId,
719 (unsigned) current_event.dwThreadId,
720 "LOAD_DLL_DEBUG_EVENT"));
721 catch_errors (handle_load_dll, NULL, "", RETURN_MASK_ALL);
722 registers_changed (); /* mark all regs invalid */
723 break;
724
725 case UNLOAD_DLL_DEBUG_EVENT:
726 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
727 (unsigned) current_event.dwProcessId,
728 (unsigned) current_event.dwThreadId,
729 "UNLOAD_DLL_DEBUG_EVENT"));
730 break; /* FIXME: don't know what to do here */
731
732 case EXCEPTION_DEBUG_EVENT:
733 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
734 (unsigned) current_event.dwProcessId,
735 (unsigned) current_event.dwThreadId,
736 "EXCEPTION_DEBUG_EVENT"));
737 if (handle_exception (ourstatus)) /* sets continue_status */
738 {
739 *retval = current_event.dwThreadId;
740 goto out;
741 }
742 break;
743
744 case OUTPUT_DEBUG_STRING_EVENT:
745 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
746 (unsigned) current_event.dwProcessId,
747 (unsigned) current_event.dwThreadId,
748 "OUTPUT_DEBUG_STRING_EVENT"));
749 if (handle_output_debug_string (ourstatus))
750 {
751 *retval = main_thread_id;
752 goto out;
753 }
754 break;
755 default:
756 printf_unfiltered ("gdb: kernel event for pid=%d tid=%d\n",
757 current_event.dwProcessId,
758 current_event.dwThreadId);
759 printf_unfiltered (" unknown event code %d\n",
760 current_event.dwDebugEventCode);
761 break;
762 }
763
764 breakout = 0;
765 CHECK (child_continue (-1));
766 continue_status = 0;
767
768 out:
769 return breakout;
770 }
771
772
773 /* Wait for interesting events to occur in the target process. */
774 static int
775 child_wait (int pid, struct target_waitstatus *ourstatus)
776 {
777 DWORD event_code;
778 int retval;
779
780 /* We loop when we get a non-standard exception rather than return
781 with a SPURIOUS because resume can try and step or modify things,
782 which needs a current_thread->h. But some of these exceptions mark
783 the birth or death of threads, which mean that the current thread
784 isn't necessarily what you think it is. */
785
786 while (1)
787 {
788 if (continue_status != 0)
789 CHECK (child_continue (-1));
790 if (get_child_debug_event (pid, ourstatus, &event_code, &retval))
791 return retval;
792 else
793 {
794 int detach = 0;
795
796 if (ui_loop_hook != NULL)
797 detach = ui_loop_hook (0);
798
799 if (detach)
800 child_kill_inferior ();
801 }
802 }
803 }
804
805 /* Attach to process PID, then initialize for debugging it. */
806
807 static void
808 child_attach (args, from_tty)
809 char *args;
810 int from_tty;
811 {
812 BOOL ok;
813
814 if (!args)
815 error_no_arg ("process-id to attach");
816
817 current_event.dwProcessId = strtoul (args, 0, 0);
818
819 ok = DebugActiveProcess (current_event.dwProcessId);
820
821 if (!ok)
822 error ("Can't attach to process.");
823
824 exception_count = 0;
825 event_count = 0;
826
827 if (from_tty)
828 {
829 char *exec_file = (char *) get_exec_file (0);
830
831 if (exec_file)
832 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
833 target_pid_to_str (current_event.dwProcessId));
834 else
835 printf_unfiltered ("Attaching to %s\n",
836 target_pid_to_str (current_event.dwProcessId));
837
838 gdb_flush (gdb_stdout);
839 }
840
841 push_target (&child_ops);
842 }
843
844 static void
845 child_detach (args, from_tty)
846 char *args;
847 int from_tty;
848 {
849 if (from_tty)
850 {
851 char *exec_file = get_exec_file (0);
852 if (exec_file == 0)
853 exec_file = "";
854 printf_unfiltered ("Detaching from program: %s %s\n", exec_file,
855 target_pid_to_str (inferior_pid));
856 gdb_flush (gdb_stdout);
857 }
858 inferior_pid = 0;
859 unpush_target (&child_ops);
860 }
861
862 /* Print status information about what we're accessing. */
863
864 static void
865 child_files_info (ignore)
866 struct target_ops *ignore;
867 {
868 printf_unfiltered ("\tUsing the running image of %s %s.\n",
869 attach_flag ? "attached" : "child", target_pid_to_str (inferior_pid));
870 }
871
872 /* ARGSUSED */
873 static void
874 child_open (arg, from_tty)
875 char *arg;
876 int from_tty;
877 {
878 error ("Use the \"run\" command to start a Unix child process.");
879 }
880
881 /* Start an inferior win32 child process and sets inferior_pid to its pid.
882 EXEC_FILE is the file to run.
883 ALLARGS is a string containing the arguments to the program.
884 ENV is the environment vector to pass. Errors reported with error(). */
885
886 static void
887 child_create_inferior (exec_file, allargs, env)
888 char *exec_file;
889 char *allargs;
890 char **env;
891 {
892 char real_path[MAXPATHLEN];
893 char *winenv;
894 char *temp;
895 int envlen;
896 int i;
897 STARTUPINFO si;
898 PROCESS_INFORMATION pi;
899 struct target_waitstatus dummy;
900 BOOL ret;
901 DWORD flags;
902 char *args;
903 DWORD event_code;
904
905 if (!exec_file)
906 {
907 error ("No executable specified, use `target exec'.\n");
908 }
909
910 memset (&si, 0, sizeof (si));
911 si.cb = sizeof (si);
912
913 cygwin32_conv_to_win32_path (exec_file, real_path);
914
915 flags = DEBUG_ONLY_THIS_PROCESS;
916
917 if (new_group)
918 flags |= CREATE_NEW_PROCESS_GROUP;
919
920 if (new_console)
921 flags |= CREATE_NEW_CONSOLE;
922
923 args = alloca (strlen (real_path) + strlen (allargs) + 2);
924
925 strcpy (args, real_path);
926
927 strcat (args, " ");
928 strcat (args, allargs);
929
930 /* Prepare the environment vars for CreateProcess. */
931 {
932 /* This code use to assume all env vars were file names and would
933 translate them all to win32 style. That obviously doesn't work in the
934 general case. The current rule is that we only translate PATH.
935 We need to handle PATH because we're about to call CreateProcess and
936 it uses PATH to find DLL's. Fortunately PATH has a well-defined value
937 in both posix and win32 environments. cygwin.dll will change it back
938 to posix style if necessary. */
939
940 static const char *conv_path_names[] =
941 {
942 "PATH=",
943 0
944 };
945
946 /* CreateProcess takes the environment list as a null terminated set of
947 strings (i.e. two nulls terminate the list). */
948
949 /* Get total size for env strings. */
950 for (envlen = 0, i = 0; env[i] && *env[i]; i++)
951 {
952 int j, len;
953
954 for (j = 0; conv_path_names[j]; j++)
955 {
956 len = strlen (conv_path_names[j]);
957 if (strncmp (conv_path_names[j], env[i], len) == 0)
958 {
959 if (cygwin32_posix_path_list_p (env[i] + len))
960 envlen += len
961 + cygwin32_posix_to_win32_path_list_buf_size (env[i] + len);
962 else
963 envlen += strlen (env[i]) + 1;
964 break;
965 }
966 }
967 if (conv_path_names[j] == NULL)
968 envlen += strlen (env[i]) + 1;
969 }
970
971 winenv = alloca (envlen + 1);
972
973 /* Copy env strings into new buffer. */
974 for (temp = winenv, i = 0; env[i] && *env[i]; i++)
975 {
976 int j, len;
977
978 for (j = 0; conv_path_names[j]; j++)
979 {
980 len = strlen (conv_path_names[j]);
981 if (strncmp (conv_path_names[j], env[i], len) == 0)
982 {
983 if (cygwin32_posix_path_list_p (env[i] + len))
984 {
985 memcpy (temp, env[i], len);
986 cygwin32_posix_to_win32_path_list (env[i] + len, temp + len);
987 }
988 else
989 strcpy (temp, env[i]);
990 break;
991 }
992 }
993 if (conv_path_names[j] == NULL)
994 strcpy (temp, env[i]);
995
996 temp += strlen (temp) + 1;
997 }
998
999 /* Final nil string to terminate new env. */
1000 *temp = 0;
1001 }
1002
1003 ret = CreateProcess (0,
1004 args, /* command line */
1005 NULL, /* Security */
1006 NULL, /* thread */
1007 TRUE, /* inherit handles */
1008 flags, /* start flags */
1009 winenv,
1010 NULL, /* current directory */
1011 &si,
1012 &pi);
1013 if (!ret)
1014 error ("Error creating process %s, (error %d)\n", exec_file, GetLastError ());
1015
1016 exception_count = 0;
1017 event_count = 0;
1018
1019 current_process_handle = pi.hProcess;
1020 current_event.dwProcessId = pi.dwProcessId;
1021 memset (&current_event, 0, sizeof (current_event));
1022 inferior_pid = current_event.dwThreadId = pi.dwThreadId;
1023 push_target (&child_ops);
1024 child_init_thread_list ();
1025 init_wait_for_inferior ();
1026 clear_proceed_status ();
1027 target_terminal_init ();
1028 target_terminal_inferior ();
1029
1030 /* Run until process and threads are loaded */
1031 do
1032 get_child_debug_event (inferior_pid, &dummy, &event_code, &ret);
1033 while (event_code != EXCEPTION_DEBUG_EVENT);
1034
1035 SymSetOptions (SYMOPT_DEFERRED_LOADS);
1036 SymInitialize (current_process_handle, NULL, TRUE);
1037
1038 proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0);
1039 }
1040
1041 static void
1042 child_mourn_inferior ()
1043 {
1044 continue_status = DBG_CONTINUE;
1045 (void) child_continue (-1);
1046 unpush_target (&child_ops);
1047 generic_mourn_inferior ();
1048 }
1049
1050 /* Send a SIGINT to the process group. This acts just like the user typed a
1051 ^C on the controlling terminal. */
1052
1053 static void
1054 child_stop ()
1055 {
1056 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
1057 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId));
1058 registers_changed (); /* refresh register state */
1059 }
1060
1061 int
1062 child_xfer_memory (CORE_ADDR memaddr, char *our, int len,
1063 int write, struct target_ops *target)
1064 {
1065 DWORD done;
1066 if (write)
1067 {
1068 DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08x\n",
1069 len, memaddr));
1070 WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our,
1071 len, &done);
1072 FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len);
1073 }
1074 else
1075 {
1076 DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08x\n",
1077 len, memaddr));
1078 ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our, len,
1079 &done);
1080 }
1081 return done;
1082 }
1083
1084 void
1085 child_kill_inferior (void)
1086 {
1087 CHECK (TerminateProcess (current_process_handle, 0));
1088
1089 for (;;)
1090 {
1091 continue_status = DBG_CONTINUE;
1092 if (!child_continue (-1))
1093 break;
1094 if (!WaitForDebugEvent (&current_event, INFINITE))
1095 break;
1096 if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
1097 break;
1098 }
1099
1100 CHECK (CloseHandle (current_process_handle));
1101
1102 /* this may fail in an attached process so don't check. */
1103 (void) CloseHandle (current_thread->h);
1104 target_mourn_inferior (); /* or just child_mourn_inferior? */
1105 }
1106
1107 void
1108 child_resume (int pid, int step, enum target_signal sig)
1109 {
1110 int i;
1111 thread_info *th;
1112
1113 DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, sig=%d);\n",
1114 pid, step, sig));
1115
1116 /* Get context for currently selected thread */
1117 th = thread_rec (current_event.dwThreadId, FALSE);
1118 if (step)
1119 {
1120 #ifdef i386
1121 /* Single step by setting t bit */
1122 child_fetch_inferior_registers (PS_REGNUM);
1123 th->context.EFlags |= FLAG_TRACE_BIT;
1124 #endif
1125 }
1126
1127 if (th->context.ContextFlags)
1128 {
1129 CHECK (SetThreadContext (th->h, &th->context));
1130 th->context.ContextFlags = 0;
1131 }
1132
1133 /* Allow continuing with the same signal that interrupted us.
1134 Otherwise complain. */
1135
1136 child_continue (pid);
1137 }
1138
1139 static void
1140 child_prepare_to_store ()
1141 {
1142 /* Do nothing, since we can store individual regs */
1143 }
1144
1145 static int
1146 child_can_run ()
1147 {
1148 return 1;
1149 }
1150
1151 static void
1152 child_close ()
1153 {
1154 DEBUG_EVENTS (("gdb: child_close, inferior_pid=%d\n", inferior_pid));
1155 }
1156
1157 struct target_ops child_ops;
1158
1159 static void
1160 init_child_ops (void)
1161 {
1162 child_ops.to_shortname = "child";
1163 child_ops.to_longname = "Win32 child process";
1164 child_ops.to_doc = "Win32 child process (started by the \"run\" command).";
1165 child_ops.to_open = child_open;
1166 child_ops.to_close = child_close;
1167 child_ops.to_attach = child_attach;
1168 child_ops.to_detach = child_detach;
1169 child_ops.to_resume = child_resume;
1170 child_ops.to_wait = child_wait;
1171 child_ops.to_fetch_registers = child_fetch_inferior_registers;
1172 child_ops.to_store_registers = child_store_inferior_registers;
1173 child_ops.to_prepare_to_store = child_prepare_to_store;
1174 child_ops.to_xfer_memory = child_xfer_memory;
1175 child_ops.to_files_info = child_files_info;
1176 child_ops.to_insert_breakpoint = memory_insert_breakpoint;
1177 child_ops.to_remove_breakpoint = memory_remove_breakpoint;
1178 child_ops.to_terminal_init = terminal_init_inferior;
1179 child_ops.to_terminal_inferior = terminal_inferior;
1180 child_ops.to_terminal_ours_for_output = terminal_ours_for_output;
1181 child_ops.to_terminal_ours = terminal_ours;
1182 child_ops.to_terminal_info = child_terminal_info;
1183 child_ops.to_kill = child_kill_inferior;
1184 child_ops.to_load = 0;
1185 child_ops.to_lookup_symbol = 0;
1186 child_ops.to_create_inferior = child_create_inferior;
1187 child_ops.to_mourn_inferior = child_mourn_inferior;
1188 child_ops.to_can_run = child_can_run;
1189 child_ops.to_notice_signals = 0;
1190 child_ops.to_thread_alive = win32_child_thread_alive;
1191 child_ops.to_pid_to_str = cygwin_pid_to_str;
1192 child_ops.to_stop = child_stop;
1193 child_ops.to_stratum = process_stratum;
1194 child_ops.DONT_USE = 0;
1195 child_ops.to_has_all_memory = 1;
1196 child_ops.to_has_memory = 1;
1197 child_ops.to_has_stack = 1;
1198 child_ops.to_has_registers = 1;
1199 child_ops.to_has_execution = 1;
1200 child_ops.to_sections = 0;
1201 child_ops.to_sections_end = 0;
1202 child_ops.to_magic = OPS_MAGIC;
1203 }
1204
1205 void
1206 _initialize_inftarg ()
1207 {
1208 struct cmd_list_element *c;
1209 init_child_ops ();
1210
1211 add_show_from_set
1212 (add_set_cmd ("new-console", class_support, var_boolean,
1213 (char *) &new_console,
1214 "Set creation of new console when creating child process.",
1215 &setlist),
1216 &showlist);
1217
1218 add_show_from_set
1219 (add_set_cmd ("new-group", class_support, var_boolean,
1220 (char *) &new_group,
1221 "Set creation of new group when creating child process.",
1222 &setlist),
1223 &showlist);
1224
1225 add_show_from_set
1226 (add_set_cmd ("debugexec", class_support, var_boolean,
1227 (char *) &debug_exec,
1228 "Set whether to display execution in child process.",
1229 &setlist),
1230 &showlist);
1231
1232 add_show_from_set
1233 (add_set_cmd ("debugevents", class_support, var_boolean,
1234 (char *) &debug_events,
1235 "Set whether to display kernel events in child process.",
1236 &setlist),
1237 &showlist);
1238
1239 add_show_from_set
1240 (add_set_cmd ("debugmemory", class_support, var_boolean,
1241 (char *) &debug_memory,
1242 "Set whether to display memory accesses in child process.",
1243 &setlist),
1244 &showlist);
1245
1246 add_show_from_set
1247 (add_set_cmd ("debugexceptions", class_support, var_boolean,
1248 (char *) &debug_exceptions,
1249 "Set whether to display kernel exceptions in child process.",
1250 &setlist),
1251 &showlist);
1252
1253 add_target (&child_ops);
1254 }
1255
1256 /* Determine if the thread referenced by "pid" is alive
1257 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
1258 it means that the pid has died. Otherwise it is assumed to be alive. */
1259 static int
1260 win32_child_thread_alive (int pid)
1261 {
1262 return WaitForSingleObject (thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ?
1263 FALSE : TRUE;
1264 }
1265
1266 /* Convert pid to printable format. */
1267 char *
1268 cygwin_pid_to_str (int pid)
1269 {
1270 static char buf[80];
1271 if (pid == current_event.dwProcessId)
1272 sprintf (buf, "process %d", pid);
1273 else
1274 sprintf (buf, "thread %d.0x%x", current_event.dwProcessId, pid);
1275 return buf;
1276 }
1277
1278 static LPVOID __stdcall
1279 sfta(HANDLE h, DWORD d)
1280 {
1281 return NULL;
1282 }
1283
1284 static DWORD __stdcall
1285 sgmb(HANDLE h, DWORD d)
1286 {
1287 #if 0
1288 return 4;
1289 #else
1290 return SymGetModuleBase (h, d) ?: 4;
1291 #endif
1292 }
1293
1294 CORE_ADDR
1295 child_frame_chain(struct frame_info *f)
1296 {
1297 STACKFRAME *sf = (STACKFRAME *) f->extra_info;
1298 if (!StackWalk (IMAGE_FILE_MACHINE_I386, current_process_handle,
1299 current_thread->h, sf, NULL, NULL, SymFunctionTableAccess, sgmb, NULL) ||
1300 !sf->AddrReturn.Offset)
1301 return 0;
1302 return sf->AddrFrame.Offset;
1303 }
1304
1305 CORE_ADDR
1306 child_frame_saved_pc(struct frame_info *f)
1307 {
1308 STACKFRAME *sf = (STACKFRAME *) f->extra_info;
1309 return sf->AddrReturn.Offset;
1310 }
1311
1312 void
1313 child_init_frame(int leaf, struct frame_info *f)
1314 {
1315 STACKFRAME *sf;
1316
1317 if (f->next && f->next->extra_info)
1318 f->extra_info = f->next->extra_info;
1319 else if (f->prev && f->prev->extra_info)
1320 f->extra_info = f->prev->extra_info;
1321 else
1322 {
1323 sf = (STACKFRAME *) frame_obstack_alloc (sizeof (*sf));
1324 f->extra_info = (struct frame_extra_info *) sf;
1325 memset (sf, 0, sizeof(*sf));
1326 sf->AddrPC.Offset = f->pc;
1327 sf->AddrPC.Mode = AddrModeFlat;
1328 sf->AddrStack.Offset = current_thread->context.Esp;
1329 sf->AddrStack.Mode = AddrModeFlat;
1330 sf->AddrFrame.Offset = f->frame;
1331 sf->AddrFrame.Mode = AddrModeFlat;
1332 }
1333 }
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