Commit | Line | Data |
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c906108c | 1 | /* Target-vector operations for controlling win32 child processes, for GDB. |
e6433c28 CF |
2 | Copyright 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
3 | Contributed by Cygnus Solutions, A Red Hat Company. | |
c906108c SS |
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 | |
c5aa993b JM |
19 | Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. | |
21 | */ | |
c906108c SS |
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" | |
c906108c SS |
31 | #include "gdbcore.h" |
32 | #include "command.h" | |
33 | #include <signal.h> | |
34 | #include <sys/types.h> | |
35 | #include <fcntl.h> | |
36 | #include <stdlib.h> | |
37 | ||
38 | #ifdef _MSC_VER | |
39 | #include "windefs.h" | |
40 | #else /* other WIN32 compiler */ | |
41 | #include <windows.h> | |
c2d11a7d | 42 | #include <imagehlp.h> |
c906108c SS |
43 | #endif |
44 | ||
45 | #include "buildsym.h" | |
46 | #include "symfile.h" | |
47 | #include "objfiles.h" | |
48 | #include "gdb_string.h" | |
49 | #include "gdbthread.h" | |
50 | #include "gdbcmd.h" | |
51 | #include <sys/param.h> | |
c2d11a7d | 52 | #include <unistd.h> |
c906108c | 53 | |
7a292a7a SS |
54 | /* The ui's event loop. */ |
55 | extern int (*ui_loop_hook) PARAMS ((int signo)); | |
56 | ||
57 | /* If we're not using the old Cygwin header file set, define the | |
58 | following which never should have been in the generic Win32 API | |
59 | headers in the first place since they were our own invention... */ | |
60 | #ifndef _GNU_H_WINDOWS_H | |
61 | #define FLAG_TRACE_BIT 0x100 | |
62 | #define CONTEXT_DEBUGGER (CONTEXT_FULL | CONTEXT_FLOATING_POINT) | |
63 | #endif | |
64 | ||
c906108c SS |
65 | /* The string sent by cygwin when it processes a signal. |
66 | FIXME: This should be in a cygwin include file. */ | |
67 | #define CYGWIN_SIGNAL_STRING "cygwin: signal" | |
68 | ||
69 | #define CHECK(x) check (x, __FILE__,__LINE__) | |
70 | #define DEBUG_EXEC(x) if (debug_exec) printf x | |
71 | #define DEBUG_EVENTS(x) if (debug_events) printf x | |
72 | #define DEBUG_MEM(x) if (debug_memory) printf x | |
73 | #define DEBUG_EXCEPT(x) if (debug_exceptions) printf x | |
74 | ||
75 | /* Forward declaration */ | |
76 | extern struct target_ops child_ops; | |
77 | ||
a14ed312 KB |
78 | static void child_stop (void); |
79 | static int win32_child_thread_alive (int); | |
80 | void child_kill_inferior (void); | |
c906108c | 81 | |
8a892701 CF |
82 | static int last_sig = 0; /* Set if a signal was received from the |
83 | debugged process */ | |
84 | ||
c906108c SS |
85 | /* Thread information structure used to track information that is |
86 | not available in gdb's thread structure. */ | |
87 | typedef struct thread_info_struct | |
c5aa993b JM |
88 | { |
89 | struct thread_info_struct *next; | |
90 | DWORD id; | |
91 | HANDLE h; | |
92 | char *name; | |
93 | int suspend_count; | |
94 | CONTEXT context; | |
c2d11a7d JM |
95 | STACKFRAME sf; |
96 | } thread_info; | |
97 | ||
98 | static thread_info thread_head = {NULL}; | |
c906108c | 99 | |
c906108c SS |
100 | /* The process and thread handles for the above context. */ |
101 | ||
102 | static DEBUG_EVENT current_event; /* The current debug event from | |
103 | WaitForDebugEvent */ | |
104 | static HANDLE current_process_handle; /* Currently executing process */ | |
105 | static thread_info *current_thread; /* Info on currently selected thread */ | |
c5aa993b | 106 | static DWORD main_thread_id; /* Thread ID of the main thread */ |
8a892701 CF |
107 | static int ignore_first_first_chance = 0; /* True if we should ignore the |
108 | first first chance exception that we get. */ | |
c906108c SS |
109 | |
110 | /* Counts of things. */ | |
111 | static int exception_count = 0; | |
112 | static int event_count = 0; | |
113 | ||
114 | /* User options. */ | |
115 | static int new_console = 0; | |
c2d11a7d | 116 | static int new_group = 1; |
c5aa993b JM |
117 | static int debug_exec = 0; /* show execution */ |
118 | static int debug_events = 0; /* show events from kernel */ | |
119 | static int debug_memory = 0; /* show target memory accesses */ | |
c906108c SS |
120 | static int debug_exceptions = 0; /* show target exceptions */ |
121 | ||
122 | /* This vector maps GDB's idea of a register's number into an address | |
123 | in the win32 exception context vector. | |
124 | ||
125 | It also contains the bit mask needed to load the register in question. | |
126 | ||
127 | One day we could read a reg, we could inspect the context we | |
128 | already have loaded, if it doesn't have the bit set that we need, | |
129 | we read that set of registers in using GetThreadContext. If the | |
130 | context already contains what we need, we just unpack it. Then to | |
131 | write a register, first we have to ensure that the context contains | |
132 | the other regs of the group, and then we copy the info in and set | |
133 | out bit. */ | |
134 | ||
135 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) | |
136 | static const int mappings[] = | |
137 | { | |
c5aa993b JM |
138 | context_offset (Eax), |
139 | context_offset (Ecx), | |
140 | context_offset (Edx), | |
141 | context_offset (Ebx), | |
142 | context_offset (Esp), | |
143 | context_offset (Ebp), | |
144 | context_offset (Esi), | |
145 | context_offset (Edi), | |
146 | context_offset (Eip), | |
147 | context_offset (EFlags), | |
148 | context_offset (SegCs), | |
149 | context_offset (SegSs), | |
150 | context_offset (SegDs), | |
151 | context_offset (SegEs), | |
152 | context_offset (SegFs), | |
153 | context_offset (SegGs), | |
154 | context_offset (FloatSave.RegisterArea[0 * 10]), | |
155 | context_offset (FloatSave.RegisterArea[1 * 10]), | |
156 | context_offset (FloatSave.RegisterArea[2 * 10]), | |
157 | context_offset (FloatSave.RegisterArea[3 * 10]), | |
158 | context_offset (FloatSave.RegisterArea[4 * 10]), | |
159 | context_offset (FloatSave.RegisterArea[5 * 10]), | |
160 | context_offset (FloatSave.RegisterArea[6 * 10]), | |
161 | context_offset (FloatSave.RegisterArea[7 * 10]), | |
c2d11a7d JM |
162 | context_offset (FloatSave.ControlWord), |
163 | context_offset (FloatSave.StatusWord), | |
164 | context_offset (FloatSave.TagWord), | |
165 | context_offset (FloatSave.ErrorSelector), | |
166 | context_offset (FloatSave.ErrorOffset), | |
167 | context_offset (FloatSave.DataSelector), | |
168 | context_offset (FloatSave.DataOffset), | |
ed9a39eb | 169 | context_offset (FloatSave.ErrorSelector) |
c906108c SS |
170 | }; |
171 | ||
ed9a39eb JM |
172 | #undef context_offset |
173 | ||
c906108c SS |
174 | /* This vector maps the target's idea of an exception (extracted |
175 | from the DEBUG_EVENT structure) to GDB's idea. */ | |
176 | ||
177 | struct xlate_exception | |
178 | { | |
179 | int them; | |
180 | enum target_signal us; | |
181 | }; | |
182 | ||
183 | static const struct xlate_exception | |
184 | xlate[] = | |
185 | { | |
186 | {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV}, | |
187 | {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV}, | |
188 | {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP}, | |
189 | {DBG_CONTROL_C, TARGET_SIGNAL_INT}, | |
190 | {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP}, | |
191 | {-1, -1}}; | |
192 | ||
193 | /* Find a thread record given a thread id. | |
194 | If get_context then also retrieve the context for this | |
195 | thread. */ | |
196 | static thread_info * | |
197 | thread_rec (DWORD id, int get_context) | |
198 | { | |
199 | thread_info *th; | |
200 | ||
c5aa993b | 201 | for (th = &thread_head; (th = th->next) != NULL;) |
c906108c SS |
202 | if (th->id == id) |
203 | { | |
204 | if (!th->suspend_count && get_context) | |
205 | { | |
8a892701 | 206 | if (get_context > 0 && id != current_event.dwThreadId) |
c906108c SS |
207 | th->suspend_count = SuspendThread (th->h) + 1; |
208 | else if (get_context < 0) | |
209 | th->suspend_count = -1; | |
210 | ||
211 | th->context.ContextFlags = CONTEXT_DEBUGGER; | |
212 | GetThreadContext (th->h, &th->context); | |
213 | } | |
214 | return th; | |
215 | } | |
216 | ||
217 | return NULL; | |
218 | } | |
219 | ||
220 | /* Add a thread to the thread list */ | |
221 | static thread_info * | |
c5aa993b | 222 | child_add_thread (DWORD id, HANDLE h) |
c906108c SS |
223 | { |
224 | thread_info *th; | |
225 | ||
226 | if ((th = thread_rec (id, FALSE))) | |
227 | return th; | |
228 | ||
229 | th = (thread_info *) xmalloc (sizeof (*th)); | |
c5aa993b | 230 | memset (th, 0, sizeof (*th)); |
c906108c SS |
231 | th->id = id; |
232 | th->h = h; | |
233 | th->next = thread_head.next; | |
234 | thread_head.next = th; | |
235 | add_thread (id); | |
236 | return th; | |
237 | } | |
238 | ||
239 | /* Clear out any old thread list and reintialize it to a | |
240 | pristine state. */ | |
241 | static void | |
242 | child_init_thread_list () | |
243 | { | |
244 | thread_info *th = &thread_head; | |
245 | ||
246 | DEBUG_EVENTS (("gdb: child_init_thread_list\n")); | |
247 | init_thread_list (); | |
248 | while (th->next != NULL) | |
249 | { | |
250 | thread_info *here = th->next; | |
251 | th->next = here->next; | |
252 | (void) CloseHandle (here->h); | |
253 | free (here); | |
254 | } | |
255 | } | |
256 | ||
257 | /* Delete a thread from the list of threads */ | |
258 | static void | |
259 | child_delete_thread (DWORD id) | |
260 | { | |
261 | thread_info *th; | |
262 | ||
263 | if (info_verbose) | |
264 | printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (id)); | |
265 | delete_thread (id); | |
266 | ||
267 | for (th = &thread_head; | |
268 | th->next != NULL && th->next->id != id; | |
269 | th = th->next) | |
270 | continue; | |
271 | ||
272 | if (th->next != NULL) | |
273 | { | |
274 | thread_info *here = th->next; | |
275 | th->next = here->next; | |
276 | CloseHandle (here->h); | |
277 | free (here); | |
278 | } | |
279 | } | |
280 | ||
281 | static void | |
282 | check (BOOL ok, const char *file, int line) | |
283 | { | |
284 | if (!ok) | |
285 | printf_filtered ("error return %s:%d was %d\n", file, line, GetLastError ()); | |
286 | } | |
287 | ||
288 | static void | |
289 | do_child_fetch_inferior_registers (int r) | |
290 | { | |
c2d11a7d JM |
291 | char *context_offset = ((char *) ¤t_thread->context) + mappings[r]; |
292 | long l; | |
293 | if (r == FCS_REGNUM) | |
294 | { | |
295 | l = *((long *)context_offset) & 0xffff; | |
296 | supply_register (r, (char *) &l); | |
297 | } | |
298 | else if (r == FOP_REGNUM) | |
299 | { | |
300 | l = (*((long *)context_offset) >> 16) & ((1 << 11) - 1); | |
301 | supply_register (r, (char *) &l); | |
302 | } | |
303 | else if (r >= 0) | |
ed9a39eb | 304 | supply_register (r, context_offset); |
c906108c SS |
305 | else |
306 | { | |
307 | for (r = 0; r < NUM_REGS; r++) | |
308 | do_child_fetch_inferior_registers (r); | |
309 | } | |
310 | } | |
311 | ||
312 | static void | |
313 | child_fetch_inferior_registers (int r) | |
314 | { | |
315 | current_thread = thread_rec (inferior_pid, TRUE); | |
316 | do_child_fetch_inferior_registers (r); | |
317 | } | |
318 | ||
319 | static void | |
320 | do_child_store_inferior_registers (int r) | |
321 | { | |
322 | if (r >= 0) | |
323 | read_register_gen (r, ((char *) ¤t_thread->context) + mappings[r]); | |
324 | else | |
325 | { | |
326 | for (r = 0; r < NUM_REGS; r++) | |
327 | do_child_store_inferior_registers (r); | |
328 | } | |
329 | } | |
330 | ||
331 | /* Store a new register value into the current thread context */ | |
332 | static void | |
333 | child_store_inferior_registers (int r) | |
334 | { | |
335 | current_thread = thread_rec (inferior_pid, TRUE); | |
336 | do_child_store_inferior_registers (r); | |
337 | } | |
338 | ||
c2d11a7d JM |
339 | #include <psapi.h> |
340 | static int psapi_loaded = 0; | |
341 | static HMODULE psapi_module_handle = NULL; | |
342 | static BOOL WINAPI (*psapi_EnumProcessModules)(HANDLE, HMODULE*, DWORD, LPDWORD)= NULL; | |
343 | static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, DWORD)= NULL; | |
344 | static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, DWORD)= NULL; | |
345 | ||
346 | int psapi_get_dll_name (DWORD BaseAddress, char *dll_name_ret) | |
347 | { | |
348 | DWORD len; | |
349 | MODULEINFO mi; | |
350 | int i; | |
351 | HMODULE dh_buf [ 1 ]; | |
352 | HMODULE* DllHandle = dh_buf; | |
353 | DWORD cbNeeded; | |
354 | BOOL ok; | |
355 | ||
356 | if (!psapi_loaded || | |
357 | psapi_EnumProcessModules == NULL || | |
358 | psapi_GetModuleInformation == NULL || | |
359 | psapi_GetModuleFileNameExA == NULL) | |
360 | { | |
361 | if (psapi_loaded)goto failed; | |
362 | psapi_loaded = 1; | |
363 | psapi_module_handle = LoadLibrary ("psapi.dll"); | |
364 | if (!psapi_module_handle) | |
365 | { | |
366 | /* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ());*/ | |
367 | goto failed; | |
368 | } | |
369 | psapi_EnumProcessModules = GetProcAddress (psapi_module_handle, "EnumProcessModules" ); | |
370 | psapi_GetModuleInformation = GetProcAddress (psapi_module_handle, "GetModuleInformation"); | |
371 | psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle, | |
372 | "GetModuleFileNameExA"); | |
373 | if (psapi_EnumProcessModules == NULL || | |
374 | psapi_GetModuleInformation == NULL || | |
375 | psapi_GetModuleFileNameExA == NULL) | |
376 | goto failed; | |
377 | } | |
378 | ||
379 | cbNeeded = 0; | |
380 | ok = (*psapi_EnumProcessModules) (current_process_handle, | |
381 | DllHandle, | |
382 | sizeof (HMODULE), | |
383 | &cbNeeded); | |
384 | ||
385 | if (!ok || !cbNeeded) | |
386 | goto failed; | |
387 | ||
388 | DllHandle = (HMODULE*) alloca (cbNeeded); | |
389 | if (!DllHandle) | |
390 | goto failed; | |
391 | ||
392 | ok = (*psapi_EnumProcessModules) (current_process_handle, | |
393 | DllHandle, | |
394 | cbNeeded, | |
395 | &cbNeeded); | |
396 | if (!ok) | |
397 | goto failed; | |
398 | ||
399 | for (i = 0; i < cbNeeded / sizeof (HMODULE); i++) | |
400 | { | |
401 | if (!(*psapi_GetModuleInformation) (current_process_handle, | |
402 | DllHandle [i], | |
403 | &mi, | |
404 | sizeof (mi))) | |
405 | error ("Can't get module info"); | |
406 | ||
407 | len = (*psapi_GetModuleFileNameExA) (current_process_handle, | |
408 | DllHandle [i], | |
409 | dll_name_ret, | |
410 | MAX_PATH); | |
411 | if (len == 0) | |
412 | error ("Error getting dll name: %u\n", GetLastError ()); | |
413 | ||
414 | if ((DWORD) (mi.lpBaseOfDll) == BaseAddress) | |
415 | return 1; | |
416 | } | |
417 | ||
418 | failed: | |
419 | dll_name_ret[0] = '\0'; | |
420 | return 0; | |
421 | } | |
422 | ||
8a892701 CF |
423 | struct safe_symbol_file_add_args |
424 | { | |
425 | char *name; | |
426 | int from_tty; | |
427 | struct section_addr_info *addrs; | |
428 | int mainline; | |
429 | int flags; | |
430 | struct objfile *ret; | |
431 | }; | |
432 | ||
433 | static int | |
434 | safe_symbol_file_add_stub (void *argv) | |
435 | { | |
436 | #define p ((struct safe_symbol_file_add_args *)argv) | |
437 | p->ret = symbol_file_add (p->name, p->from_tty, p->addrs, p->mainline, p->flags); | |
438 | return !!p->ret; | |
439 | #undef p | |
440 | } | |
441 | ||
442 | static void | |
443 | safe_symbol_file_add_cleanup (void *gdb_stderrv) | |
444 | { | |
445 | ui_file_delete (gdb_stderr); | |
446 | gdb_stderr = (struct ui_file *)gdb_stderrv; | |
447 | } | |
448 | ||
449 | static struct objfile * | |
450 | safe_symbol_file_add (char *name, int from_tty, | |
451 | struct section_addr_info *addrs, | |
452 | int mainline, int flags) | |
453 | ||
454 | { | |
455 | struct safe_symbol_file_add_args p; | |
456 | struct cleanup *cleanup; | |
457 | ||
458 | cleanup = make_cleanup (safe_symbol_file_add_cleanup, gdb_stderr); | |
459 | ||
460 | gdb_stderr = ui_file_new (); | |
461 | p.name = name; | |
462 | p.from_tty = from_tty; | |
463 | p.addrs = addrs; | |
464 | p.mainline = mainline; | |
465 | p.flags = flags; | |
466 | catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR); | |
467 | ||
468 | do_cleanups (cleanup); | |
469 | return p.ret; | |
470 | } | |
471 | ||
c906108c SS |
472 | /* Wait for child to do something. Return pid of child, or -1 in case |
473 | of error; store status through argument pointer OURSTATUS. */ | |
474 | ||
475 | static int | |
476 | handle_load_dll (PTR dummy) | |
477 | { | |
c5aa993b | 478 | LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; |
c906108c SS |
479 | DWORD dll_name_ptr; |
480 | DWORD done; | |
481 | char dll_buf[MAX_PATH + 1]; | |
7be570e7 | 482 | char *p, *dll_name = NULL; |
c906108c SS |
483 | struct objfile *objfile; |
484 | MEMORY_BASIC_INFORMATION minfo; | |
2acceee2 | 485 | struct section_addr_info section_addrs; |
c906108c | 486 | |
2acceee2 | 487 | memset (§ion_addrs, 0, sizeof (section_addrs)); |
c5aa993b | 488 | dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; |
c906108c | 489 | |
c2d11a7d JM |
490 | if (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf)) |
491 | dll_buf[0] = dll_buf[sizeof(dll_buf) - 1] = '\0'; | |
c906108c | 492 | |
c2d11a7d | 493 | dll_name = dll_buf; |
c906108c SS |
494 | |
495 | /* Attempt to read the name of the dll that was detected. | |
496 | This is documented to work only when actively debugging | |
497 | a program. It will not work for attached processes. */ | |
498 | if (dll_name == NULL || *dll_name == '\0') | |
499 | { | |
500 | int size = event->fUnicode ? sizeof (WCHAR) : sizeof (char); | |
501 | int len = 0; | |
502 | char b[2]; | |
503 | ||
504 | ReadProcessMemory (current_process_handle, | |
505 | (LPCVOID) event->lpImageName, | |
506 | (char *) &dll_name_ptr, | |
507 | sizeof (dll_name_ptr), &done); | |
508 | ||
509 | /* See if we could read the address of a string, and that the | |
c5aa993b | 510 | address isn't null. */ |
c906108c SS |
511 | |
512 | if (done != sizeof (dll_name_ptr) || !dll_name_ptr) | |
513 | return 1; | |
514 | ||
515 | do | |
516 | { | |
517 | ReadProcessMemory (current_process_handle, | |
518 | (LPCVOID) (dll_name_ptr + len * size), | |
519 | &b, | |
520 | size, | |
521 | &done); | |
522 | len++; | |
523 | } | |
524 | while ((b[0] != 0 || b[size - 1] != 0) && done == size); | |
525 | ||
526 | dll_name = alloca (len); | |
527 | ||
528 | if (event->fUnicode) | |
529 | { | |
530 | WCHAR *unicode_dll_name = (WCHAR *) alloca (len * sizeof (WCHAR)); | |
531 | ReadProcessMemory (current_process_handle, | |
532 | (LPCVOID) dll_name_ptr, | |
533 | unicode_dll_name, | |
534 | len * sizeof (WCHAR), | |
535 | &done); | |
536 | ||
537 | WideCharToMultiByte (CP_ACP, 0, | |
538 | unicode_dll_name, len, | |
539 | dll_name, len, 0, 0); | |
540 | } | |
541 | else | |
542 | { | |
543 | ReadProcessMemory (current_process_handle, | |
544 | (LPCVOID) dll_name_ptr, | |
545 | dll_name, | |
546 | len, | |
547 | &done); | |
548 | } | |
549 | } | |
550 | ||
551 | if (!dll_name) | |
552 | return 1; | |
553 | ||
554 | while ((p = strchr (dll_name, '\\'))) | |
555 | *p = '/'; | |
556 | ||
c906108c SS |
557 | /* The symbols in a dll are offset by 0x1000, which is the |
558 | the offset from 0 of the first byte in an image - because | |
8a892701 | 559 | of the file header and the section alignment. */ |
c906108c | 560 | |
0aa9cf96 EZ |
561 | section_addrs.other[0].name = ".text"; |
562 | section_addrs.other[0].addr = (int) event->lpBaseOfDll + 0x1000; | |
8a892701 CF |
563 | safe_symbol_file_add (dll_name, 0, §ion_addrs, 0, OBJF_SHARED); |
564 | printf_unfiltered ("%x:%s\n", event->lpBaseOfDll, dll_name); | |
c906108c | 565 | |
c906108c SS |
566 | return 1; |
567 | } | |
568 | ||
569 | /* Handle DEBUG_STRING output from child process. | |
570 | Cygwin prepends its messages with a "cygwin:". Interpret this as | |
571 | a Cygwin signal. Otherwise just print the string as a warning. */ | |
572 | static int | |
573 | handle_output_debug_string (struct target_waitstatus *ourstatus) | |
574 | { | |
575 | char *s; | |
576 | int gotasig = FALSE; | |
577 | ||
578 | if (!target_read_string | |
c5aa993b | 579 | ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0) |
c906108c SS |
580 | || !s || !*s) |
581 | return gotasig; | |
582 | ||
ed9a39eb | 583 | if (strncmp (s, CYGWIN_SIGNAL_STRING, sizeof (CYGWIN_SIGNAL_STRING) - 1) != 0) |
c906108c | 584 | { |
ed9a39eb | 585 | if (strncmp (s, "cYg", 3) != 0) |
c2d11a7d | 586 | warning (s); |
c906108c | 587 | } |
ed9a39eb | 588 | else |
c906108c SS |
589 | { |
590 | char *p; | |
c2d11a7d JM |
591 | int sig = strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0); |
592 | gotasig = target_signal_from_host (sig); | |
7a292a7a SS |
593 | ourstatus->value.sig = gotasig; |
594 | if (gotasig) | |
c906108c SS |
595 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
596 | } | |
597 | ||
598 | free (s); | |
599 | return gotasig; | |
600 | } | |
601 | ||
602 | static int | |
603 | handle_exception (struct target_waitstatus *ourstatus) | |
604 | { | |
605 | int i; | |
606 | int done = 0; | |
607 | thread_info *th; | |
8a892701 | 608 | int fc = ignore_first_first_chance; |
c906108c SS |
609 | |
610 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
611 | ||
8a892701 CF |
612 | ignore_first_first_chance = 0; |
613 | ||
c906108c SS |
614 | /* Record the context of the current thread */ |
615 | th = thread_rec (current_event.dwThreadId, -1); | |
616 | ||
8a892701 CF |
617 | last_sig = 0; |
618 | ||
c906108c SS |
619 | switch (current_event.u.Exception.ExceptionRecord.ExceptionCode) |
620 | { | |
621 | case EXCEPTION_ACCESS_VIOLATION: | |
622 | DEBUG_EXCEPT (("gdb: Target exception ACCESS_VIOLATION at 0x%08x\n", | |
c5aa993b | 623 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
c906108c | 624 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
8a892701 | 625 | last_sig = SIGSEGV; |
c906108c | 626 | break; |
0d06e24b JM |
627 | case STATUS_FLOAT_UNDERFLOW: |
628 | case STATUS_FLOAT_DIVIDE_BY_ZERO: | |
629 | case STATUS_FLOAT_OVERFLOW: | |
630 | case STATUS_INTEGER_DIVIDE_BY_ZERO: | |
631 | DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08x\n", | |
632 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); | |
633 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
0d06e24b | 634 | break; |
c906108c SS |
635 | case STATUS_STACK_OVERFLOW: |
636 | DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08x\n", | |
c5aa993b | 637 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
c906108c SS |
638 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
639 | break; | |
640 | case EXCEPTION_BREAKPOINT: | |
8a892701 CF |
641 | if (fc && current_event.u.Exception.dwFirstChance && |
642 | ((DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress & 0xc0000000)) | |
643 | { | |
644 | last_sig = -1; | |
645 | return 0; | |
646 | } | |
c906108c | 647 | DEBUG_EXCEPT (("gdb: Target exception BREAKPOINT at 0x%08x\n", |
c5aa993b | 648 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
c906108c SS |
649 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
650 | break; | |
651 | case DBG_CONTROL_C: | |
652 | DEBUG_EXCEPT (("gdb: Target exception CONTROL_C at 0x%08x\n", | |
c5aa993b | 653 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
c906108c | 654 | ourstatus->value.sig = TARGET_SIGNAL_INT; |
8a892701 | 655 | last_sig = SIGINT; /* FIXME - should check pass state */ |
c906108c SS |
656 | break; |
657 | case EXCEPTION_SINGLE_STEP: | |
658 | DEBUG_EXCEPT (("gdb: Target exception SINGLE_STEP at 0x%08x\n", | |
c5aa993b | 659 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
c906108c SS |
660 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
661 | break; | |
8227c82d CF |
662 | case EXCEPTION_ILLEGAL_INSTRUCTION: |
663 | DEBUG_EXCEPT (("gdb: Target exception SINGLE_ILL at 0x%08x\n", | |
664 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); | |
665 | ourstatus->value.sig = TARGET_SIGNAL_ILL; | |
8a892701 | 666 | last_sig = SIGILL; |
8227c82d | 667 | break; |
c906108c | 668 | default: |
c906108c | 669 | printf_unfiltered ("gdb: unknown target exception 0x%08x at 0x%08x\n", |
c5aa993b JM |
670 | current_event.u.Exception.ExceptionRecord.ExceptionCode, |
671 | current_event.u.Exception.ExceptionRecord.ExceptionAddress); | |
c906108c SS |
672 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; |
673 | break; | |
674 | } | |
675 | exception_count++; | |
676 | return 1; | |
677 | } | |
678 | ||
679 | /* Resume all artificially suspended threads if we are continuing | |
680 | execution */ | |
681 | static BOOL | |
8a892701 | 682 | child_continue (DWORD continue_status, int id) |
c906108c SS |
683 | { |
684 | int i; | |
685 | thread_info *th; | |
686 | BOOL res; | |
687 | ||
688 | DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=%d, DBG_CONTINUE);\n", | |
689 | current_event.dwProcessId, current_event.dwThreadId)); | |
7a292a7a SS |
690 | res = ContinueDebugEvent (current_event.dwProcessId, |
691 | current_event.dwThreadId, | |
692 | continue_status); | |
c2d11a7d | 693 | continue_status = 0; |
7a292a7a | 694 | if (res) |
c5aa993b | 695 | for (th = &thread_head; (th = th->next) != NULL;) |
c906108c SS |
696 | if (((id == -1) || (id == th->id)) && th->suspend_count) |
697 | { | |
698 | for (i = 0; i < th->suspend_count; i++) | |
699 | (void) ResumeThread (th->h); | |
700 | th->suspend_count = 0; | |
701 | } | |
702 | ||
703 | return res; | |
704 | } | |
705 | ||
8a892701 CF |
706 | /* Get the next event from the child. Return 1 if the event requires |
707 | handling by WFI (or whatever). | |
708 | */ | |
c2d11a7d JM |
709 | static int |
710 | get_child_debug_event (int pid, struct target_waitstatus *ourstatus, | |
8a892701 | 711 | DWORD target_event_code, int *retval) |
c2d11a7d | 712 | { |
8a892701 | 713 | int breakout = 0; |
c2d11a7d | 714 | BOOL debug_event; |
8a892701 CF |
715 | DWORD continue_status, event_code; |
716 | thread_info *th = NULL; | |
717 | static thread_info dummy_thread_info; | |
c2d11a7d | 718 | |
8a892701 | 719 | if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) |
c2d11a7d | 720 | { |
8a892701 | 721 | *retval = 0; |
c2d11a7d JM |
722 | goto out; |
723 | } | |
724 | ||
725 | event_count++; | |
726 | continue_status = DBG_CONTINUE; | |
727 | *retval = 0; | |
728 | ||
8a892701 CF |
729 | event_code = current_event.dwDebugEventCode; |
730 | breakout = event_code == target_event_code; | |
731 | ||
732 | switch (event_code) | |
c2d11a7d JM |
733 | { |
734 | case CREATE_THREAD_DEBUG_EVENT: | |
735 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n", | |
8a892701 CF |
736 | (unsigned) current_event.dwProcessId, |
737 | (unsigned) current_event.dwThreadId, | |
738 | "CREATE_THREAD_DEBUG_EVENT")); | |
c2d11a7d | 739 | /* Record the existence of this thread */ |
8a892701 CF |
740 | th = child_add_thread (current_event.dwThreadId, |
741 | current_event.u.CreateThread.hThread); | |
c2d11a7d JM |
742 | if (info_verbose) |
743 | printf_unfiltered ("[New %s]\n", | |
8a892701 | 744 | target_pid_to_str (current_event.dwThreadId)); |
c2d11a7d JM |
745 | break; |
746 | ||
747 | case EXIT_THREAD_DEBUG_EVENT: | |
748 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
8a892701 CF |
749 | (unsigned) current_event.dwProcessId, |
750 | (unsigned) current_event.dwThreadId, | |
751 | "EXIT_THREAD_DEBUG_EVENT")); | |
c2d11a7d | 752 | child_delete_thread (current_event.dwThreadId); |
8a892701 | 753 | th = &dummy_thread_info; |
c2d11a7d JM |
754 | break; |
755 | ||
756 | case CREATE_PROCESS_DEBUG_EVENT: | |
757 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
8a892701 CF |
758 | (unsigned) current_event.dwProcessId, |
759 | (unsigned) current_event.dwThreadId, | |
760 | "CREATE_PROCESS_DEBUG_EVENT")); | |
c2d11a7d JM |
761 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; |
762 | ||
763 | main_thread_id = inferior_pid = current_event.dwThreadId; | |
764 | /* Add the main thread */ | |
8a892701 CF |
765 | th = child_add_thread (inferior_pid, |
766 | current_event.u.CreateProcessInfo.hThread); | |
c2d11a7d JM |
767 | break; |
768 | ||
769 | case EXIT_PROCESS_DEBUG_EVENT: | |
770 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
8a892701 CF |
771 | (unsigned) current_event.dwProcessId, |
772 | (unsigned) current_event.dwThreadId, | |
773 | "EXIT_PROCESS_DEBUG_EVENT")); | |
c2d11a7d JM |
774 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
775 | ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode; | |
776 | CloseHandle (current_process_handle); | |
777 | *retval = current_event.dwProcessId; | |
8a892701 CF |
778 | breakout = 1; |
779 | break; | |
c2d11a7d JM |
780 | |
781 | case LOAD_DLL_DEBUG_EVENT: | |
782 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
8a892701 CF |
783 | (unsigned) current_event.dwProcessId, |
784 | (unsigned) current_event.dwThreadId, | |
785 | "LOAD_DLL_DEBUG_EVENT")); | |
786 | catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL); | |
c2d11a7d JM |
787 | registers_changed (); /* mark all regs invalid */ |
788 | break; | |
789 | ||
790 | case UNLOAD_DLL_DEBUG_EVENT: | |
791 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
8a892701 CF |
792 | (unsigned) current_event.dwProcessId, |
793 | (unsigned) current_event.dwThreadId, | |
794 | "UNLOAD_DLL_DEBUG_EVENT")); | |
795 | break; /* FIXME: don't know what to do here */ | |
c2d11a7d JM |
796 | |
797 | case EXCEPTION_DEBUG_EVENT: | |
798 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
8a892701 CF |
799 | (unsigned) current_event.dwProcessId, |
800 | (unsigned) current_event.dwThreadId, | |
801 | "EXCEPTION_DEBUG_EVENT")); | |
802 | if (handle_exception (ourstatus)) | |
803 | *retval = current_event.dwThreadId; | |
804 | else | |
c2d11a7d | 805 | { |
8a892701 CF |
806 | if (last_sig >= 0) |
807 | continue_status = DBG_EXCEPTION_NOT_HANDLED; | |
808 | breakout = 0; | |
c2d11a7d JM |
809 | } |
810 | break; | |
811 | ||
8a892701 | 812 | case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */ |
c2d11a7d | 813 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
8a892701 CF |
814 | (unsigned) current_event.dwProcessId, |
815 | (unsigned) current_event.dwThreadId, | |
816 | "OUTPUT_DEBUG_STRING_EVENT")); | |
817 | handle_output_debug_string ( ourstatus); | |
c2d11a7d JM |
818 | break; |
819 | default: | |
820 | printf_unfiltered ("gdb: kernel event for pid=%d tid=%d\n", | |
821 | current_event.dwProcessId, | |
822 | current_event.dwThreadId); | |
823 | printf_unfiltered (" unknown event code %d\n", | |
824 | current_event.dwDebugEventCode); | |
825 | break; | |
826 | } | |
827 | ||
8a892701 CF |
828 | if (breakout) |
829 | current_thread = th ?: thread_rec (current_event.dwThreadId, TRUE); | |
830 | else | |
831 | CHECK (child_continue (continue_status, -1)); | |
c2d11a7d JM |
832 | |
833 | out: | |
834 | return breakout; | |
835 | } | |
836 | ||
c2d11a7d | 837 | /* Wait for interesting events to occur in the target process. */ |
c906108c SS |
838 | static int |
839 | child_wait (int pid, struct target_waitstatus *ourstatus) | |
840 | { | |
c2d11a7d JM |
841 | DWORD event_code; |
842 | int retval; | |
843 | ||
c906108c SS |
844 | /* We loop when we get a non-standard exception rather than return |
845 | with a SPURIOUS because resume can try and step or modify things, | |
846 | which needs a current_thread->h. But some of these exceptions mark | |
847 | the birth or death of threads, which mean that the current thread | |
848 | isn't necessarily what you think it is. */ | |
849 | ||
850 | while (1) | |
8a892701 CF |
851 | if (get_child_debug_event (pid, ourstatus, EXCEPTION_DEBUG_EVENT, &retval)) |
852 | return retval; | |
853 | else | |
854 | { | |
855 | int detach = 0; | |
c906108c | 856 | |
8a892701 CF |
857 | if (ui_loop_hook != NULL) |
858 | detach = ui_loop_hook (0); | |
7a292a7a | 859 | |
8a892701 CF |
860 | if (detach) |
861 | child_kill_inferior (); | |
862 | } | |
c906108c SS |
863 | } |
864 | ||
865 | /* Attach to process PID, then initialize for debugging it. */ | |
866 | ||
867 | static void | |
868 | child_attach (args, from_tty) | |
869 | char *args; | |
870 | int from_tty; | |
871 | { | |
872 | BOOL ok; | |
873 | ||
874 | if (!args) | |
875 | error_no_arg ("process-id to attach"); | |
876 | ||
877 | current_event.dwProcessId = strtoul (args, 0, 0); | |
878 | ||
879 | ok = DebugActiveProcess (current_event.dwProcessId); | |
880 | ||
881 | if (!ok) | |
882 | error ("Can't attach to process."); | |
883 | ||
884 | exception_count = 0; | |
885 | event_count = 0; | |
886 | ||
887 | if (from_tty) | |
888 | { | |
889 | char *exec_file = (char *) get_exec_file (0); | |
890 | ||
891 | if (exec_file) | |
892 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, | |
893 | target_pid_to_str (current_event.dwProcessId)); | |
894 | else | |
895 | printf_unfiltered ("Attaching to %s\n", | |
896 | target_pid_to_str (current_event.dwProcessId)); | |
897 | ||
898 | gdb_flush (gdb_stdout); | |
899 | } | |
900 | ||
901 | push_target (&child_ops); | |
902 | } | |
903 | ||
904 | static void | |
905 | child_detach (args, from_tty) | |
906 | char *args; | |
907 | int from_tty; | |
908 | { | |
909 | if (from_tty) | |
910 | { | |
911 | char *exec_file = get_exec_file (0); | |
912 | if (exec_file == 0) | |
913 | exec_file = ""; | |
914 | printf_unfiltered ("Detaching from program: %s %s\n", exec_file, | |
915 | target_pid_to_str (inferior_pid)); | |
916 | gdb_flush (gdb_stdout); | |
917 | } | |
918 | inferior_pid = 0; | |
919 | unpush_target (&child_ops); | |
920 | } | |
921 | ||
922 | /* Print status information about what we're accessing. */ | |
923 | ||
924 | static void | |
925 | child_files_info (ignore) | |
926 | struct target_ops *ignore; | |
927 | { | |
928 | printf_unfiltered ("\tUsing the running image of %s %s.\n", | |
929 | attach_flag ? "attached" : "child", target_pid_to_str (inferior_pid)); | |
930 | } | |
931 | ||
932 | /* ARGSUSED */ | |
933 | static void | |
934 | child_open (arg, from_tty) | |
935 | char *arg; | |
936 | int from_tty; | |
937 | { | |
938 | error ("Use the \"run\" command to start a Unix child process."); | |
939 | } | |
940 | ||
941 | /* Start an inferior win32 child process and sets inferior_pid to its pid. | |
942 | EXEC_FILE is the file to run. | |
943 | ALLARGS is a string containing the arguments to the program. | |
944 | ENV is the environment vector to pass. Errors reported with error(). */ | |
945 | ||
946 | static void | |
947 | child_create_inferior (exec_file, allargs, env) | |
948 | char *exec_file; | |
949 | char *allargs; | |
950 | char **env; | |
951 | { | |
952 | char real_path[MAXPATHLEN]; | |
953 | char *winenv; | |
954 | char *temp; | |
c5aa993b | 955 | int envlen; |
c906108c | 956 | int i; |
c906108c SS |
957 | STARTUPINFO si; |
958 | PROCESS_INFORMATION pi; | |
959 | struct target_waitstatus dummy; | |
960 | BOOL ret; | |
961 | DWORD flags; | |
962 | char *args; | |
c2d11a7d | 963 | DWORD event_code; |
c906108c SS |
964 | |
965 | if (!exec_file) | |
966 | { | |
967 | error ("No executable specified, use `target exec'.\n"); | |
968 | } | |
969 | ||
970 | memset (&si, 0, sizeof (si)); | |
971 | si.cb = sizeof (si); | |
972 | ||
973 | cygwin32_conv_to_win32_path (exec_file, real_path); | |
974 | ||
975 | flags = DEBUG_ONLY_THIS_PROCESS; | |
976 | ||
977 | if (new_group) | |
978 | flags |= CREATE_NEW_PROCESS_GROUP; | |
979 | ||
980 | if (new_console) | |
981 | flags |= CREATE_NEW_CONSOLE; | |
982 | ||
983 | args = alloca (strlen (real_path) + strlen (allargs) + 2); | |
984 | ||
985 | strcpy (args, real_path); | |
986 | ||
987 | strcat (args, " "); | |
988 | strcat (args, allargs); | |
989 | ||
990 | /* Prepare the environment vars for CreateProcess. */ | |
991 | { | |
992 | /* This code use to assume all env vars were file names and would | |
993 | translate them all to win32 style. That obviously doesn't work in the | |
994 | general case. The current rule is that we only translate PATH. | |
995 | We need to handle PATH because we're about to call CreateProcess and | |
996 | it uses PATH to find DLL's. Fortunately PATH has a well-defined value | |
997 | in both posix and win32 environments. cygwin.dll will change it back | |
998 | to posix style if necessary. */ | |
999 | ||
1000 | static const char *conv_path_names[] = | |
c5aa993b JM |
1001 | { |
1002 | "PATH=", | |
1003 | 0 | |
1004 | }; | |
c906108c SS |
1005 | |
1006 | /* CreateProcess takes the environment list as a null terminated set of | |
1007 | strings (i.e. two nulls terminate the list). */ | |
1008 | ||
1009 | /* Get total size for env strings. */ | |
1010 | for (envlen = 0, i = 0; env[i] && *env[i]; i++) | |
1011 | { | |
1012 | int j, len; | |
1013 | ||
1014 | for (j = 0; conv_path_names[j]; j++) | |
1015 | { | |
1016 | len = strlen (conv_path_names[j]); | |
1017 | if (strncmp (conv_path_names[j], env[i], len) == 0) | |
1018 | { | |
1019 | if (cygwin32_posix_path_list_p (env[i] + len)) | |
1020 | envlen += len | |
1021 | + cygwin32_posix_to_win32_path_list_buf_size (env[i] + len); | |
1022 | else | |
1023 | envlen += strlen (env[i]) + 1; | |
1024 | break; | |
1025 | } | |
1026 | } | |
1027 | if (conv_path_names[j] == NULL) | |
1028 | envlen += strlen (env[i]) + 1; | |
1029 | } | |
1030 | ||
1031 | winenv = alloca (envlen + 1); | |
1032 | ||
1033 | /* Copy env strings into new buffer. */ | |
1034 | for (temp = winenv, i = 0; env[i] && *env[i]; i++) | |
1035 | { | |
1036 | int j, len; | |
1037 | ||
1038 | for (j = 0; conv_path_names[j]; j++) | |
1039 | { | |
1040 | len = strlen (conv_path_names[j]); | |
1041 | if (strncmp (conv_path_names[j], env[i], len) == 0) | |
1042 | { | |
1043 | if (cygwin32_posix_path_list_p (env[i] + len)) | |
1044 | { | |
1045 | memcpy (temp, env[i], len); | |
1046 | cygwin32_posix_to_win32_path_list (env[i] + len, temp + len); | |
1047 | } | |
1048 | else | |
1049 | strcpy (temp, env[i]); | |
1050 | break; | |
1051 | } | |
1052 | } | |
1053 | if (conv_path_names[j] == NULL) | |
1054 | strcpy (temp, env[i]); | |
1055 | ||
1056 | temp += strlen (temp) + 1; | |
1057 | } | |
1058 | ||
1059 | /* Final nil string to terminate new env. */ | |
1060 | *temp = 0; | |
1061 | } | |
1062 | ||
1063 | ret = CreateProcess (0, | |
c5aa993b | 1064 | args, /* command line */ |
c906108c SS |
1065 | NULL, /* Security */ |
1066 | NULL, /* thread */ | |
1067 | TRUE, /* inherit handles */ | |
1068 | flags, /* start flags */ | |
1069 | winenv, | |
1070 | NULL, /* current directory */ | |
1071 | &si, | |
1072 | &pi); | |
1073 | if (!ret) | |
c5aa993b | 1074 | error ("Error creating process %s, (error %d)\n", exec_file, GetLastError ()); |
c906108c SS |
1075 | |
1076 | exception_count = 0; | |
1077 | event_count = 0; | |
1078 | ||
1079 | current_process_handle = pi.hProcess; | |
1080 | current_event.dwProcessId = pi.dwProcessId; | |
1081 | memset (¤t_event, 0, sizeof (current_event)); | |
1082 | inferior_pid = current_event.dwThreadId = pi.dwThreadId; | |
1083 | push_target (&child_ops); | |
1084 | child_init_thread_list (); | |
1085 | init_wait_for_inferior (); | |
1086 | clear_proceed_status (); | |
1087 | target_terminal_init (); | |
1088 | target_terminal_inferior (); | |
1089 | ||
8a892701 | 1090 | ignore_first_first_chance = 1; |
c906108c | 1091 | |
8a892701 CF |
1092 | /* Run until process and threads are loaded */ |
1093 | while (!get_child_debug_event (inferior_pid, &dummy, | |
1094 | CREATE_PROCESS_DEBUG_EVENT, &ret)) | |
1095 | continue; | |
ed9a39eb | 1096 | |
8a892701 | 1097 | /* child_continue (DBG_CONTINUE, -1);*/ |
c2d11a7d | 1098 | proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0); |
c906108c SS |
1099 | } |
1100 | ||
1101 | static void | |
1102 | child_mourn_inferior () | |
1103 | { | |
8a892701 | 1104 | (void) child_continue (DBG_CONTINUE, -1); |
c906108c SS |
1105 | unpush_target (&child_ops); |
1106 | generic_mourn_inferior (); | |
1107 | } | |
1108 | ||
1109 | /* Send a SIGINT to the process group. This acts just like the user typed a | |
1110 | ^C on the controlling terminal. */ | |
1111 | ||
1112 | static void | |
1113 | child_stop () | |
1114 | { | |
1115 | DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n")); | |
c2d11a7d | 1116 | CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId)); |
c5aa993b | 1117 | registers_changed (); /* refresh register state */ |
c906108c SS |
1118 | } |
1119 | ||
1120 | int | |
1121 | child_xfer_memory (CORE_ADDR memaddr, char *our, int len, | |
1122 | int write, struct target_ops *target) | |
1123 | { | |
1124 | DWORD done; | |
1125 | if (write) | |
1126 | { | |
1127 | DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08x\n", | |
1128 | len, memaddr)); | |
1129 | WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our, | |
1130 | len, &done); | |
1131 | FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len); | |
1132 | } | |
1133 | else | |
1134 | { | |
1135 | DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08x\n", | |
1136 | len, memaddr)); | |
1137 | ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our, len, | |
1138 | &done); | |
1139 | } | |
1140 | return done; | |
1141 | } | |
1142 | ||
1143 | void | |
1144 | child_kill_inferior (void) | |
1145 | { | |
1146 | CHECK (TerminateProcess (current_process_handle, 0)); | |
1147 | ||
1148 | for (;;) | |
1149 | { | |
8a892701 | 1150 | if (!child_continue (DBG_CONTINUE, -1)) |
c906108c SS |
1151 | break; |
1152 | if (!WaitForDebugEvent (¤t_event, INFINITE)) | |
1153 | break; | |
1154 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) | |
1155 | break; | |
1156 | } | |
1157 | ||
1158 | CHECK (CloseHandle (current_process_handle)); | |
1159 | ||
1160 | /* this may fail in an attached process so don't check. */ | |
1161 | (void) CloseHandle (current_thread->h); | |
c5aa993b | 1162 | target_mourn_inferior (); /* or just child_mourn_inferior? */ |
c906108c SS |
1163 | } |
1164 | ||
1165 | void | |
1166 | child_resume (int pid, int step, enum target_signal sig) | |
1167 | { | |
c906108c | 1168 | thread_info *th; |
8a892701 CF |
1169 | DWORD continue_status = last_sig > 0 && last_sig < NSIG ? |
1170 | DBG_EXCEPTION_NOT_HANDLED : DBG_CONTINUE; | |
1171 | ||
1172 | last_sig = 0; | |
c906108c SS |
1173 | |
1174 | DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, sig=%d);\n", | |
1175 | pid, step, sig)); | |
1176 | ||
1177 | /* Get context for currently selected thread */ | |
1178 | th = thread_rec (current_event.dwThreadId, FALSE); | |
1179 | if (step) | |
1180 | { | |
1181 | #ifdef i386 | |
1182 | /* Single step by setting t bit */ | |
1183 | child_fetch_inferior_registers (PS_REGNUM); | |
1184 | th->context.EFlags |= FLAG_TRACE_BIT; | |
1185 | #endif | |
1186 | } | |
1187 | ||
1188 | if (th->context.ContextFlags) | |
1189 | { | |
1190 | CHECK (SetThreadContext (th->h, &th->context)); | |
1191 | th->context.ContextFlags = 0; | |
1192 | } | |
1193 | ||
1194 | /* Allow continuing with the same signal that interrupted us. | |
1195 | Otherwise complain. */ | |
c906108c | 1196 | |
8a892701 | 1197 | child_continue (continue_status, pid); |
c906108c SS |
1198 | } |
1199 | ||
1200 | static void | |
1201 | child_prepare_to_store () | |
1202 | { | |
1203 | /* Do nothing, since we can store individual regs */ | |
1204 | } | |
1205 | ||
1206 | static int | |
1207 | child_can_run () | |
1208 | { | |
1209 | return 1; | |
1210 | } | |
1211 | ||
1212 | static void | |
1213 | child_close () | |
1214 | { | |
1215 | DEBUG_EVENTS (("gdb: child_close, inferior_pid=%d\n", inferior_pid)); | |
1216 | } | |
1217 | ||
c5aa993b | 1218 | struct target_ops child_ops; |
c906108c | 1219 | |
c5aa993b JM |
1220 | static void |
1221 | init_child_ops (void) | |
c906108c | 1222 | { |
c5aa993b JM |
1223 | child_ops.to_shortname = "child"; |
1224 | child_ops.to_longname = "Win32 child process"; | |
1225 | child_ops.to_doc = "Win32 child process (started by the \"run\" command)."; | |
1226 | child_ops.to_open = child_open; | |
1227 | child_ops.to_close = child_close; | |
1228 | child_ops.to_attach = child_attach; | |
1229 | child_ops.to_detach = child_detach; | |
1230 | child_ops.to_resume = child_resume; | |
1231 | child_ops.to_wait = child_wait; | |
1232 | child_ops.to_fetch_registers = child_fetch_inferior_registers; | |
1233 | child_ops.to_store_registers = child_store_inferior_registers; | |
1234 | child_ops.to_prepare_to_store = child_prepare_to_store; | |
1235 | child_ops.to_xfer_memory = child_xfer_memory; | |
1236 | child_ops.to_files_info = child_files_info; | |
1237 | child_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
1238 | child_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
1239 | child_ops.to_terminal_init = terminal_init_inferior; | |
1240 | child_ops.to_terminal_inferior = terminal_inferior; | |
1241 | child_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
1242 | child_ops.to_terminal_ours = terminal_ours; | |
1243 | child_ops.to_terminal_info = child_terminal_info; | |
1244 | child_ops.to_kill = child_kill_inferior; | |
1245 | child_ops.to_load = 0; | |
1246 | child_ops.to_lookup_symbol = 0; | |
1247 | child_ops.to_create_inferior = child_create_inferior; | |
1248 | child_ops.to_mourn_inferior = child_mourn_inferior; | |
1249 | child_ops.to_can_run = child_can_run; | |
1250 | child_ops.to_notice_signals = 0; | |
1251 | child_ops.to_thread_alive = win32_child_thread_alive; | |
ed9a39eb | 1252 | child_ops.to_pid_to_str = cygwin_pid_to_str; |
c5aa993b JM |
1253 | child_ops.to_stop = child_stop; |
1254 | child_ops.to_stratum = process_stratum; | |
1255 | child_ops.DONT_USE = 0; | |
1256 | child_ops.to_has_all_memory = 1; | |
1257 | child_ops.to_has_memory = 1; | |
1258 | child_ops.to_has_stack = 1; | |
1259 | child_ops.to_has_registers = 1; | |
1260 | child_ops.to_has_execution = 1; | |
1261 | child_ops.to_sections = 0; | |
1262 | child_ops.to_sections_end = 0; | |
1263 | child_ops.to_magic = OPS_MAGIC; | |
c906108c SS |
1264 | } |
1265 | ||
1266 | void | |
1267 | _initialize_inftarg () | |
1268 | { | |
c5aa993b | 1269 | init_child_ops (); |
c906108c SS |
1270 | |
1271 | add_show_from_set | |
1272 | (add_set_cmd ("new-console", class_support, var_boolean, | |
1273 | (char *) &new_console, | |
1274 | "Set creation of new console when creating child process.", | |
1275 | &setlist), | |
1276 | &showlist); | |
1277 | ||
1278 | add_show_from_set | |
1279 | (add_set_cmd ("new-group", class_support, var_boolean, | |
1280 | (char *) &new_group, | |
1281 | "Set creation of new group when creating child process.", | |
1282 | &setlist), | |
1283 | &showlist); | |
1284 | ||
1285 | add_show_from_set | |
1286 | (add_set_cmd ("debugexec", class_support, var_boolean, | |
1287 | (char *) &debug_exec, | |
1288 | "Set whether to display execution in child process.", | |
1289 | &setlist), | |
1290 | &showlist); | |
1291 | ||
1292 | add_show_from_set | |
1293 | (add_set_cmd ("debugevents", class_support, var_boolean, | |
1294 | (char *) &debug_events, | |
1295 | "Set whether to display kernel events in child process.", | |
1296 | &setlist), | |
1297 | &showlist); | |
1298 | ||
1299 | add_show_from_set | |
1300 | (add_set_cmd ("debugmemory", class_support, var_boolean, | |
1301 | (char *) &debug_memory, | |
1302 | "Set whether to display memory accesses in child process.", | |
1303 | &setlist), | |
1304 | &showlist); | |
1305 | ||
1306 | add_show_from_set | |
1307 | (add_set_cmd ("debugexceptions", class_support, var_boolean, | |
1308 | (char *) &debug_exceptions, | |
c5aa993b | 1309 | "Set whether to display kernel exceptions in child process.", |
c906108c SS |
1310 | &setlist), |
1311 | &showlist); | |
1312 | ||
1313 | add_target (&child_ops); | |
1314 | } | |
1315 | ||
1316 | /* Determine if the thread referenced by "pid" is alive | |
1317 | by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0 | |
1318 | it means that the pid has died. Otherwise it is assumed to be alive. */ | |
1319 | static int | |
1320 | win32_child_thread_alive (int pid) | |
1321 | { | |
c5aa993b JM |
1322 | return WaitForSingleObject (thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ? |
1323 | FALSE : TRUE; | |
c906108c SS |
1324 | } |
1325 | ||
1326 | /* Convert pid to printable format. */ | |
1327 | char * | |
1328 | cygwin_pid_to_str (int pid) | |
1329 | { | |
1330 | static char buf[80]; | |
1331 | if (pid == current_event.dwProcessId) | |
1332 | sprintf (buf, "process %d", pid); | |
1333 | else | |
1334 | sprintf (buf, "thread %d.0x%x", current_event.dwProcessId, pid); | |
1335 | return buf; | |
1336 | } |