Commit | Line | Data |
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c906108c SS |
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 | |
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" | |
03f2053f | 31 | #include "gdb_wait.h" |
c906108c SS |
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> | |
c2d11a7d | 43 | #include <imagehlp.h> |
c906108c SS |
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> | |
c2d11a7d | 53 | #include <unistd.h> |
c906108c | 54 | |
7a292a7a SS |
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 | ||
c906108c SS |
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)); | |
7a292a7a | 81 | void child_kill_inferior PARAMS ((void)); |
c906108c | 82 | |
c906108c SS |
83 | /* Thread information structure used to track information that is |
84 | not available in gdb's thread structure. */ | |
85 | typedef struct thread_info_struct | |
c5aa993b JM |
86 | { |
87 | struct thread_info_struct *next; | |
88 | DWORD id; | |
89 | HANDLE h; | |
90 | char *name; | |
91 | int suspend_count; | |
92 | CONTEXT context; | |
c2d11a7d JM |
93 | STACKFRAME sf; |
94 | } thread_info; | |
95 | ||
96 | static thread_info thread_head = {NULL}; | |
c906108c | 97 | |
c2d11a7d JM |
98 | /* The saved state for a continue after breaking back to gdb. */ |
99 | static DWORD continue_status; | |
c906108c SS |
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 */ | |
c5aa993b | 107 | static DWORD main_thread_id; /* Thread ID of the main thread */ |
c906108c SS |
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; | |
c2d11a7d | 115 | static int new_group = 1; |
c5aa993b JM |
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 */ | |
c906108c SS |
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 | { | |
c5aa993b JM |
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]), | |
c2d11a7d JM |
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), | |
ed9a39eb | 168 | context_offset (FloatSave.ErrorSelector) |
c906108c SS |
169 | }; |
170 | ||
ed9a39eb JM |
171 | #undef context_offset |
172 | ||
c906108c SS |
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 | ||
c5aa993b | 200 | for (th = &thread_head; (th = th->next) != NULL;) |
c906108c SS |
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 * | |
c5aa993b | 221 | child_add_thread (DWORD id, HANDLE h) |
c906108c SS |
222 | { |
223 | thread_info *th; | |
224 | ||
225 | if ((th = thread_rec (id, FALSE))) | |
226 | return th; | |
227 | ||
228 | th = (thread_info *) xmalloc (sizeof (*th)); | |
c5aa993b | 229 | memset (th, 0, sizeof (*th)); |
c906108c SS |
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 | { | |
c2d11a7d JM |
290 | char *context_offset = ((char *) ¤t_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) | |
ed9a39eb | 303 | supply_register (r, context_offset); |
c906108c SS |
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 *) ¤t_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 | ||
c2d11a7d JM |
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 | ||
c906108c SS |
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 | { | |
c5aa993b | 428 | LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; |
c906108c SS |
429 | DWORD dll_name_ptr; |
430 | DWORD done; | |
431 | char dll_buf[MAX_PATH + 1]; | |
7be570e7 | 432 | char *p, *dll_name = NULL; |
c906108c SS |
433 | struct objfile *objfile; |
434 | MEMORY_BASIC_INFORMATION minfo; | |
2acceee2 | 435 | struct section_addr_info section_addrs; |
c906108c | 436 | |
2acceee2 | 437 | memset (§ion_addrs, 0, sizeof (section_addrs)); |
c5aa993b | 438 | dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; |
c906108c | 439 | |
c2d11a7d JM |
440 | if (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf)) |
441 | dll_buf[0] = dll_buf[sizeof(dll_buf) - 1] = '\0'; | |
c906108c | 442 | |
c2d11a7d | 443 | dll_name = dll_buf; |
c906108c SS |
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 | |
c5aa993b | 460 | address isn't null. */ |
c906108c SS |
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 | ||
c906108c SS |
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); | |
2acceee2 | 514 | section_addrs.text_addr = (int) event->lpBaseOfDll + 0x1000; |
2df3850c | 515 | symbol_file_add (dll_name, 0, §ion_addrs, 0, OBJF_SHARED); |
c906108c SS |
516 | printf_unfiltered ("\n"); |
517 | ||
c906108c SS |
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 | |
c5aa993b | 531 | ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0) |
c906108c SS |
532 | || !s || !*s) |
533 | return gotasig; | |
534 | ||
ed9a39eb | 535 | if (strncmp (s, CYGWIN_SIGNAL_STRING, sizeof (CYGWIN_SIGNAL_STRING) - 1) != 0) |
c906108c | 536 | { |
ed9a39eb | 537 | if (strncmp (s, "cYg", 3) != 0) |
c2d11a7d | 538 | warning (s); |
c906108c | 539 | } |
ed9a39eb | 540 | else |
c906108c SS |
541 | { |
542 | char *p; | |
c2d11a7d JM |
543 | int sig = strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0); |
544 | gotasig = target_signal_from_host (sig); | |
7a292a7a SS |
545 | ourstatus->value.sig = gotasig; |
546 | if (gotasig) | |
c906108c SS |
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", | |
c5aa993b | 570 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
c906108c | 571 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
c2d11a7d | 572 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
c906108c | 573 | break; |
0d06e24b JM |
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; | |
c906108c SS |
583 | case STATUS_STACK_OVERFLOW: |
584 | DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08x\n", | |
c5aa993b | 585 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
c906108c | 586 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
c2d11a7d | 587 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
c906108c SS |
588 | break; |
589 | case EXCEPTION_BREAKPOINT: | |
590 | DEBUG_EXCEPT (("gdb: Target exception BREAKPOINT at 0x%08x\n", | |
c5aa993b | 591 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
c906108c SS |
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", | |
c5aa993b | 596 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
c906108c | 597 | ourstatus->value.sig = TARGET_SIGNAL_INT; |
c2d11a7d | 598 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
c906108c SS |
599 | break; |
600 | case EXCEPTION_SINGLE_STEP: | |
601 | DEBUG_EXCEPT (("gdb: Target exception SINGLE_STEP at 0x%08x\n", | |
c5aa993b | 602 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
c906108c SS |
603 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
604 | break; | |
605 | default: | |
606 | /* This may be a structured exception handling exception. In | |
c5aa993b | 607 | that case, we want to let the program try to handle it, and |
ed9a39eb | 608 | only break if we see the exception a second time. |
c906108c | 609 | if (current_event.u.Exception.dwFirstChance) |
ed9a39eb | 610 | |
c906108c | 611 | return 0; |
ed9a39eb | 612 | */ |
c906108c SS |
613 | |
614 | printf_unfiltered ("gdb: unknown target exception 0x%08x at 0x%08x\n", | |
c5aa993b JM |
615 | current_event.u.Exception.ExceptionRecord.ExceptionCode, |
616 | current_event.u.Exception.ExceptionRecord.ExceptionAddress); | |
c906108c | 617 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; |
c2d11a7d | 618 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
c906108c SS |
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 | |
c2d11a7d | 628 | child_continue (int id) |
c906108c SS |
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)); | |
7a292a7a SS |
636 | res = ContinueDebugEvent (current_event.dwProcessId, |
637 | current_event.dwThreadId, | |
638 | continue_status); | |
c2d11a7d | 639 | continue_status = 0; |
7a292a7a | 640 | if (res) |
c5aa993b | 641 | for (th = &thread_head; (th = th->next) != NULL;) |
c906108c SS |
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 | ||
c2d11a7d JM |
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 (¤t_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. */ | |
c906108c SS |
774 | static int |
775 | child_wait (int pid, struct target_waitstatus *ourstatus) | |
776 | { | |
c2d11a7d JM |
777 | DWORD event_code; |
778 | int retval; | |
779 | ||
c906108c SS |
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 | { | |
c2d11a7d JM |
788 | if (continue_status != 0) |
789 | CHECK (child_continue (-1)); | |
790 | if (get_child_debug_event (pid, ourstatus, &event_code, &retval)) | |
791 | return retval; | |
7a292a7a SS |
792 | else |
793 | { | |
794 | int detach = 0; | |
c906108c | 795 | |
7a292a7a SS |
796 | if (ui_loop_hook != NULL) |
797 | detach = ui_loop_hook (0); | |
798 | ||
799 | if (detach) | |
800 | child_kill_inferior (); | |
801 | } | |
c906108c SS |
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; | |
c5aa993b | 895 | int envlen; |
c906108c | 896 | int i; |
c906108c SS |
897 | STARTUPINFO si; |
898 | PROCESS_INFORMATION pi; | |
899 | struct target_waitstatus dummy; | |
900 | BOOL ret; | |
901 | DWORD flags; | |
902 | char *args; | |
c2d11a7d | 903 | DWORD event_code; |
c906108c SS |
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[] = | |
c5aa993b JM |
941 | { |
942 | "PATH=", | |
943 | 0 | |
944 | }; | |
c906108c SS |
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, | |
c5aa993b | 1004 | args, /* command line */ |
c906108c SS |
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) | |
c5aa993b | 1014 | error ("Error creating process %s, (error %d)\n", exec_file, GetLastError ()); |
c906108c SS |
1015 | |
1016 | exception_count = 0; | |
1017 | event_count = 0; | |
1018 | ||
1019 | current_process_handle = pi.hProcess; | |
1020 | current_event.dwProcessId = pi.dwProcessId; | |
1021 | memset (¤t_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 | ||
c2d11a7d JM |
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); | |
c906108c | 1034 | |
ed9a39eb JM |
1035 | SymSetOptions (SYMOPT_DEFERRED_LOADS); |
1036 | SymInitialize (current_process_handle, NULL, TRUE); | |
1037 | ||
c2d11a7d | 1038 | proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0); |
c906108c SS |
1039 | } |
1040 | ||
1041 | static void | |
1042 | child_mourn_inferior () | |
1043 | { | |
c2d11a7d JM |
1044 | continue_status = DBG_CONTINUE; |
1045 | (void) child_continue (-1); | |
c906108c SS |
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")); | |
c2d11a7d | 1057 | CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId)); |
c5aa993b | 1058 | registers_changed (); /* refresh register state */ |
c906108c SS |
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 | { | |
c2d11a7d JM |
1091 | continue_status = DBG_CONTINUE; |
1092 | if (!child_continue (-1)) | |
c906108c SS |
1093 | break; |
1094 | if (!WaitForDebugEvent (¤t_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); | |
c5aa993b | 1104 | target_mourn_inferior (); /* or just child_mourn_inferior? */ |
c906108c SS |
1105 | } |
1106 | ||
1107 | void | |
1108 | child_resume (int pid, int step, enum target_signal sig) | |
1109 | { | |
1110 | int i; | |
1111 | thread_info *th; | |
c906108c SS |
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. */ | |
c906108c | 1135 | |
c2d11a7d | 1136 | child_continue (pid); |
c906108c SS |
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 | ||
c5aa993b | 1157 | struct target_ops child_ops; |
c906108c | 1158 | |
c5aa993b JM |
1159 | static void |
1160 | init_child_ops (void) | |
c906108c | 1161 | { |
c5aa993b JM |
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; | |
ed9a39eb | 1191 | child_ops.to_pid_to_str = cygwin_pid_to_str; |
c5aa993b JM |
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; | |
c906108c SS |
1203 | } |
1204 | ||
1205 | void | |
1206 | _initialize_inftarg () | |
1207 | { | |
1208 | struct cmd_list_element *c; | |
c5aa993b | 1209 | init_child_ops (); |
c906108c SS |
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, | |
c5aa993b | 1249 | "Set whether to display kernel exceptions in child process.", |
c906108c SS |
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 | { | |
c5aa993b JM |
1262 | return WaitForSingleObject (thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ? |
1263 | FALSE : TRUE; | |
c906108c SS |
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 | } | |
ed9a39eb JM |
1277 | |
1278 | static LPVOID __stdcall | |
1279 | sfta(HANDLE h, DWORD d) | |
c2d11a7d | 1280 | { |
ed9a39eb | 1281 | return NULL; |
c2d11a7d JM |
1282 | } |
1283 | ||
ed9a39eb JM |
1284 | static DWORD __stdcall |
1285 | sgmb(HANDLE h, DWORD d) | |
c2d11a7d | 1286 | { |
c2d11a7d | 1287 | #if 0 |
ed9a39eb JM |
1288 | return 4; |
1289 | #else | |
1290 | return SymGetModuleBase (h, d) ?: 4; | |
c2d11a7d | 1291 | #endif |
ed9a39eb JM |
1292 | } |
1293 | ||
1294 | CORE_ADDR | |
1295 | child_frame_chain(struct frame_info *f) | |
1296 | { | |
1297 | STACKFRAME *sf = (STACKFRAME *) f->extra_info; | |
c2d11a7d | 1298 | if (!StackWalk (IMAGE_FILE_MACHINE_I386, current_process_handle, |
ed9a39eb JM |
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 | } | |
c2d11a7d | 1333 | } |