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