| 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, Boston, MA 02111-1307, USA. |
| 20 | */ |
| 21 | |
| 22 | /* by Steve Chamberlain, sac@cygnus.com */ |
| 23 | |
| 24 | /* We assume we're being built with and will be used for cygwin32. */ |
| 25 | |
| 26 | #include "defs.h" |
| 27 | #include "frame.h" /* required by inferior.h */ |
| 28 | #include "inferior.h" |
| 29 | #include "target.h" |
| 30 | #include "wait.h" |
| 31 | #include "gdbcore.h" |
| 32 | #include "command.h" |
| 33 | #include <signal.h> |
| 34 | #include <sys/types.h> |
| 35 | #include <fcntl.h> |
| 36 | #include <stdlib.h> |
| 37 | |
| 38 | #ifdef _MSC_VER |
| 39 | #include "windefs.h" |
| 40 | #else /* other WIN32 compiler */ |
| 41 | #include <windows.h> |
| 42 | #endif |
| 43 | |
| 44 | #include "buildsym.h" |
| 45 | #include "symfile.h" |
| 46 | #include "objfiles.h" |
| 47 | #include "gdb_string.h" |
| 48 | #include "gdbthread.h" |
| 49 | #include "gdbcmd.h" |
| 50 | #include <sys/param.h> |
| 51 | #include <unistd.h> |
| 52 | |
| 53 | #define CHECK(x) check (x, __FILE__,__LINE__) |
| 54 | #define DEBUG_EXEC(x) if (debug_exec) printf x |
| 55 | #define DEBUG_EVENTS(x) if (debug_events) printf x |
| 56 | #define DEBUG_MEM(x) if (debug_memory) printf x |
| 57 | #define DEBUG_EXCEPT(x) if (debug_exceptions) printf x |
| 58 | |
| 59 | /* Forward declaration */ |
| 60 | extern struct target_ops child_ops; |
| 61 | |
| 62 | static void child_stop PARAMS ((void)); |
| 63 | |
| 64 | /* The most recently read context. Inspect ContextFlags to see what |
| 65 | bits are valid. */ |
| 66 | |
| 67 | static CONTEXT context; |
| 68 | |
| 69 | /* The process and thread handles for the above context. */ |
| 70 | |
| 71 | static HANDLE current_process; |
| 72 | static HANDLE current_thread; |
| 73 | static int current_process_id; |
| 74 | static int current_thread_id; |
| 75 | |
| 76 | /* Counts of things. */ |
| 77 | static int exception_count = 0; |
| 78 | static int event_count = 0; |
| 79 | |
| 80 | /* User options. */ |
| 81 | static int new_console = 0; |
| 82 | static int new_group = 0; |
| 83 | static int debug_exec = 0; /* show execution */ |
| 84 | static int debug_events = 0; /* show events from kernel */ |
| 85 | static int debug_memory = 0; /* show target memory accesses */ |
| 86 | static int debug_exceptions = 0; /* show target exceptions */ |
| 87 | |
| 88 | /* This vector maps GDB's idea of a register's number into an address |
| 89 | in the win32 exception context vector. |
| 90 | |
| 91 | It also contains the bit mask needed to load the register in question. |
| 92 | |
| 93 | One day we could read a reg, we could inspect the context we |
| 94 | already have loaded, if it doesn't have the bit set that we need, |
| 95 | we read that set of registers in using GetThreadContext. If the |
| 96 | context already contains what we need, we just unpack it. Then to |
| 97 | write a register, first we have to ensure that the context contains |
| 98 | the other regs of the group, and then we copy the info in and set |
| 99 | out bit. */ |
| 100 | |
| 101 | struct regmappings |
| 102 | { |
| 103 | char *incontext; |
| 104 | int mask; |
| 105 | }; |
| 106 | |
| 107 | static const struct regmappings mappings[] = |
| 108 | { |
| 109 | #ifdef __PPC__ |
| 110 | {(char *) &context.Gpr0, CONTEXT_INTEGER}, |
| 111 | {(char *) &context.Gpr1, CONTEXT_INTEGER}, |
| 112 | {(char *) &context.Gpr2, CONTEXT_INTEGER}, |
| 113 | {(char *) &context.Gpr3, CONTEXT_INTEGER}, |
| 114 | {(char *) &context.Gpr4, CONTEXT_INTEGER}, |
| 115 | {(char *) &context.Gpr5, CONTEXT_INTEGER}, |
| 116 | {(char *) &context.Gpr6, CONTEXT_INTEGER}, |
| 117 | {(char *) &context.Gpr7, CONTEXT_INTEGER}, |
| 118 | |
| 119 | {(char *) &context.Gpr8, CONTEXT_INTEGER}, |
| 120 | {(char *) &context.Gpr9, CONTEXT_INTEGER}, |
| 121 | {(char *) &context.Gpr10, CONTEXT_INTEGER}, |
| 122 | {(char *) &context.Gpr11, CONTEXT_INTEGER}, |
| 123 | {(char *) &context.Gpr12, CONTEXT_INTEGER}, |
| 124 | {(char *) &context.Gpr13, CONTEXT_INTEGER}, |
| 125 | {(char *) &context.Gpr14, CONTEXT_INTEGER}, |
| 126 | {(char *) &context.Gpr15, CONTEXT_INTEGER}, |
| 127 | |
| 128 | {(char *) &context.Gpr16, CONTEXT_INTEGER}, |
| 129 | {(char *) &context.Gpr17, CONTEXT_INTEGER}, |
| 130 | {(char *) &context.Gpr18, CONTEXT_INTEGER}, |
| 131 | {(char *) &context.Gpr19, CONTEXT_INTEGER}, |
| 132 | {(char *) &context.Gpr20, CONTEXT_INTEGER}, |
| 133 | {(char *) &context.Gpr21, CONTEXT_INTEGER}, |
| 134 | {(char *) &context.Gpr22, CONTEXT_INTEGER}, |
| 135 | {(char *) &context.Gpr23, CONTEXT_INTEGER}, |
| 136 | |
| 137 | {(char *) &context.Gpr24, CONTEXT_INTEGER}, |
| 138 | {(char *) &context.Gpr25, CONTEXT_INTEGER}, |
| 139 | {(char *) &context.Gpr26, CONTEXT_INTEGER}, |
| 140 | {(char *) &context.Gpr27, CONTEXT_INTEGER}, |
| 141 | {(char *) &context.Gpr28, CONTEXT_INTEGER}, |
| 142 | {(char *) &context.Gpr29, CONTEXT_INTEGER}, |
| 143 | {(char *) &context.Gpr30, CONTEXT_INTEGER}, |
| 144 | {(char *) &context.Gpr31, CONTEXT_INTEGER}, |
| 145 | |
| 146 | {(char *) &context.Fpr0, CONTEXT_FLOATING_POINT}, |
| 147 | {(char *) &context.Fpr1, CONTEXT_FLOATING_POINT}, |
| 148 | {(char *) &context.Fpr2, CONTEXT_FLOATING_POINT}, |
| 149 | {(char *) &context.Fpr3, CONTEXT_FLOATING_POINT}, |
| 150 | {(char *) &context.Fpr4, CONTEXT_FLOATING_POINT}, |
| 151 | {(char *) &context.Fpr5, CONTEXT_FLOATING_POINT}, |
| 152 | {(char *) &context.Fpr6, CONTEXT_FLOATING_POINT}, |
| 153 | {(char *) &context.Fpr7, CONTEXT_FLOATING_POINT}, |
| 154 | |
| 155 | {(char *) &context.Fpr8, CONTEXT_FLOATING_POINT}, |
| 156 | {(char *) &context.Fpr9, CONTEXT_FLOATING_POINT}, |
| 157 | {(char *) &context.Fpr10, CONTEXT_FLOATING_POINT}, |
| 158 | {(char *) &context.Fpr11, CONTEXT_FLOATING_POINT}, |
| 159 | {(char *) &context.Fpr12, CONTEXT_FLOATING_POINT}, |
| 160 | {(char *) &context.Fpr13, CONTEXT_FLOATING_POINT}, |
| 161 | {(char *) &context.Fpr14, CONTEXT_FLOATING_POINT}, |
| 162 | {(char *) &context.Fpr15, CONTEXT_FLOATING_POINT}, |
| 163 | |
| 164 | {(char *) &context.Fpr16, CONTEXT_FLOATING_POINT}, |
| 165 | {(char *) &context.Fpr17, CONTEXT_FLOATING_POINT}, |
| 166 | {(char *) &context.Fpr18, CONTEXT_FLOATING_POINT}, |
| 167 | {(char *) &context.Fpr19, CONTEXT_FLOATING_POINT}, |
| 168 | {(char *) &context.Fpr20, CONTEXT_FLOATING_POINT}, |
| 169 | {(char *) &context.Fpr21, CONTEXT_FLOATING_POINT}, |
| 170 | {(char *) &context.Fpr22, CONTEXT_FLOATING_POINT}, |
| 171 | {(char *) &context.Fpr23, CONTEXT_FLOATING_POINT}, |
| 172 | |
| 173 | {(char *) &context.Fpr24, CONTEXT_FLOATING_POINT}, |
| 174 | {(char *) &context.Fpr25, CONTEXT_FLOATING_POINT}, |
| 175 | {(char *) &context.Fpr26, CONTEXT_FLOATING_POINT}, |
| 176 | {(char *) &context.Fpr27, CONTEXT_FLOATING_POINT}, |
| 177 | {(char *) &context.Fpr28, CONTEXT_FLOATING_POINT}, |
| 178 | {(char *) &context.Fpr29, CONTEXT_FLOATING_POINT}, |
| 179 | {(char *) &context.Fpr30, CONTEXT_FLOATING_POINT}, |
| 180 | {(char *) &context.Fpr31, CONTEXT_FLOATING_POINT}, |
| 181 | |
| 182 | {(char *) &context.Iar, CONTEXT_CONTROL}, |
| 183 | {(char *) &context.Msr, CONTEXT_CONTROL}, |
| 184 | {(char *) &context.Cr, CONTEXT_INTEGER}, |
| 185 | {(char *) &context.Lr, CONTEXT_CONTROL}, |
| 186 | {(char *) &context.Ctr, CONTEXT_CONTROL}, |
| 187 | |
| 188 | {(char *) &context.Xer, CONTEXT_INTEGER}, |
| 189 | {0,0}, /* MQ, but there isn't one */ |
| 190 | #else |
| 191 | {(char *) &context.Eax, CONTEXT_INTEGER}, |
| 192 | {(char *) &context.Ecx, CONTEXT_INTEGER}, |
| 193 | {(char *) &context.Edx, CONTEXT_INTEGER}, |
| 194 | {(char *) &context.Ebx, CONTEXT_INTEGER}, |
| 195 | {(char *) &context.Esp, CONTEXT_CONTROL}, |
| 196 | {(char *) &context.Ebp, CONTEXT_CONTROL}, |
| 197 | {(char *) &context.Esi, CONTEXT_INTEGER}, |
| 198 | {(char *) &context.Edi, CONTEXT_INTEGER}, |
| 199 | {(char *) &context.Eip, CONTEXT_CONTROL}, |
| 200 | {(char *) &context.EFlags, CONTEXT_CONTROL}, |
| 201 | {(char *) &context.SegCs, CONTEXT_SEGMENTS}, |
| 202 | {(char *) &context.SegSs, CONTEXT_SEGMENTS}, |
| 203 | {(char *) &context.SegDs, CONTEXT_SEGMENTS}, |
| 204 | {(char *) &context.SegEs, CONTEXT_SEGMENTS}, |
| 205 | {(char *) &context.SegFs, CONTEXT_SEGMENTS}, |
| 206 | {(char *) &context.SegGs, CONTEXT_SEGMENTS}, |
| 207 | {&context.FloatSave.RegisterArea[0 * 10], CONTEXT_FLOATING_POINT}, |
| 208 | {&context.FloatSave.RegisterArea[1 * 10], CONTEXT_FLOATING_POINT}, |
| 209 | {&context.FloatSave.RegisterArea[2 * 10], CONTEXT_FLOATING_POINT}, |
| 210 | {&context.FloatSave.RegisterArea[3 * 10], CONTEXT_FLOATING_POINT}, |
| 211 | {&context.FloatSave.RegisterArea[4 * 10], CONTEXT_FLOATING_POINT}, |
| 212 | {&context.FloatSave.RegisterArea[5 * 10], CONTEXT_FLOATING_POINT}, |
| 213 | {&context.FloatSave.RegisterArea[6 * 10], CONTEXT_FLOATING_POINT}, |
| 214 | {&context.FloatSave.RegisterArea[7 * 10], CONTEXT_FLOATING_POINT}, |
| 215 | #endif |
| 216 | }; |
| 217 | |
| 218 | /* This vector maps the target's idea of an exception (extracted |
| 219 | from the DEBUG_EVENT structure) to GDB's idea. */ |
| 220 | |
| 221 | struct xlate_exception |
| 222 | { |
| 223 | int them; |
| 224 | enum target_signal us; |
| 225 | }; |
| 226 | |
| 227 | static const struct xlate_exception |
| 228 | xlate[] = |
| 229 | { |
| 230 | {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV}, |
| 231 | {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV}, |
| 232 | {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP}, |
| 233 | {DBG_CONTROL_C, TARGET_SIGNAL_INT}, |
| 234 | {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP}, |
| 235 | {-1, -1}}; |
| 236 | |
| 237 | static void |
| 238 | check (BOOL ok, const char *file, int line) |
| 239 | { |
| 240 | if (!ok) |
| 241 | printf_filtered ("error return %s:%d was %d\n", file, line, GetLastError ()); |
| 242 | } |
| 243 | |
| 244 | static void |
| 245 | child_fetch_inferior_registers (int r) |
| 246 | { |
| 247 | if (r < 0) |
| 248 | { |
| 249 | for (r = 0; r < NUM_REGS; r++) |
| 250 | child_fetch_inferior_registers (r); |
| 251 | } |
| 252 | else |
| 253 | { |
| 254 | supply_register (r, mappings[r].incontext); |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | static void |
| 259 | child_store_inferior_registers (int r) |
| 260 | { |
| 261 | if (r < 0) |
| 262 | { |
| 263 | for (r = 0; r < NUM_REGS; r++) |
| 264 | child_store_inferior_registers (r); |
| 265 | } |
| 266 | else |
| 267 | { |
| 268 | read_register_gen (r, mappings[r].incontext); |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | |
| 273 | /* Wait for child to do something. Return pid of child, or -1 in case |
| 274 | of error; store status through argument pointer OURSTATUS. */ |
| 275 | |
| 276 | static int |
| 277 | handle_load_dll (char *eventp) |
| 278 | { |
| 279 | DEBUG_EVENT * event = (DEBUG_EVENT *)eventp; |
| 280 | DWORD dll_name_ptr; |
| 281 | DWORD done; |
| 282 | |
| 283 | ReadProcessMemory (current_process, |
| 284 | (DWORD) event->u.LoadDll.lpImageName, |
| 285 | (char *) &dll_name_ptr, |
| 286 | sizeof (dll_name_ptr), &done); |
| 287 | |
| 288 | /* See if we could read the address of a string, and that the |
| 289 | address isn't null. */ |
| 290 | |
| 291 | if (done == sizeof (dll_name_ptr) && dll_name_ptr) |
| 292 | { |
| 293 | char *dll_name, *dll_basename; |
| 294 | struct objfile *objfile; |
| 295 | char unix_dll_name[MAX_PATH]; |
| 296 | int size = event->u.LoadDll.fUnicode ? sizeof (WCHAR) : sizeof (char); |
| 297 | int len = 0; |
| 298 | char b[2]; |
| 299 | do |
| 300 | { |
| 301 | ReadProcessMemory (current_process, |
| 302 | dll_name_ptr + len * size, |
| 303 | &b, |
| 304 | size, |
| 305 | &done); |
| 306 | len++; |
| 307 | } |
| 308 | while ((b[0] != 0 || b[size - 1] != 0) && done == size); |
| 309 | |
| 310 | dll_name = alloca (len); |
| 311 | |
| 312 | if (event->u.LoadDll.fUnicode) |
| 313 | { |
| 314 | WCHAR *unicode_dll_name = (WCHAR *) alloca (len * sizeof (WCHAR)); |
| 315 | ReadProcessMemory (current_process, |
| 316 | dll_name_ptr, |
| 317 | unicode_dll_name, |
| 318 | len * sizeof (WCHAR), |
| 319 | &done); |
| 320 | |
| 321 | WideCharToMultiByte (CP_ACP, 0, |
| 322 | unicode_dll_name, len, |
| 323 | dll_name, len, 0, 0); |
| 324 | } |
| 325 | else |
| 326 | { |
| 327 | ReadProcessMemory (current_process, |
| 328 | dll_name_ptr, |
| 329 | dll_name, |
| 330 | len, |
| 331 | &done); |
| 332 | } |
| 333 | |
| 334 | /* FIXME: Can we delete this call? */ |
| 335 | cygwin32_conv_to_posix_path (dll_name, unix_dll_name); |
| 336 | |
| 337 | /* FIXME!! It would be nice to define one symbol which pointed to the |
| 338 | front of the dll if we can't find any symbols. */ |
| 339 | |
| 340 | if (!(dll_basename = strrchr(dll_name, '\\'))) |
| 341 | dll_basename = strrchr(dll_name, '/'); |
| 342 | |
| 343 | ALL_OBJFILES(objfile) |
| 344 | { |
| 345 | char *objfile_basename; |
| 346 | if (!(objfile_basename = strrchr(objfile->name, '\\'))) |
| 347 | objfile_basename = strrchr(objfile->name, '/'); |
| 348 | |
| 349 | if (dll_basename && objfile_basename && |
| 350 | strcmp(dll_basename+1, objfile_basename+1) == 0) |
| 351 | { |
| 352 | printf_unfiltered ("%s (symbols previously loaded)\n", |
| 353 | dll_basename + 1); |
| 354 | return 1; |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | context.ContextFlags = CONTEXT_FULL | CONTEXT_FLOATING_POINT; |
| 359 | GetThreadContext (current_thread, &context); |
| 360 | |
| 361 | /* The symbols in a dll are offset by 0x1000, which is the |
| 362 | the offset from 0 of the first byte in an image - because |
| 363 | of the file header and the section alignment. |
| 364 | |
| 365 | FIXME: Is this the real reason that we need the 0x1000 ? */ |
| 366 | |
| 367 | |
| 368 | symbol_file_add (unix_dll_name, 0, |
| 369 | (int) event->u.LoadDll.lpBaseOfDll + 0x1000, 0, 0, 0); |
| 370 | |
| 371 | printf_unfiltered ("%x:%s\n", event->u.LoadDll.lpBaseOfDll, |
| 372 | unix_dll_name); |
| 373 | } |
| 374 | return 1; |
| 375 | } |
| 376 | |
| 377 | |
| 378 | static int |
| 379 | handle_exception (DEBUG_EVENT * event, struct target_waitstatus *ourstatus) |
| 380 | { |
| 381 | int i; |
| 382 | int done = 0; |
| 383 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 384 | |
| 385 | |
| 386 | switch (event->u.Exception.ExceptionRecord.ExceptionCode) |
| 387 | { |
| 388 | case EXCEPTION_ACCESS_VIOLATION: |
| 389 | DEBUG_EXCEPT (("gdb: Target exception ACCESS_VIOLATION at 0x%08x\n", |
| 390 | event->u.Exception.ExceptionRecord.ExceptionAddress)); |
| 391 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
| 392 | break; |
| 393 | case STATUS_STACK_OVERFLOW: |
| 394 | DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08x\n", |
| 395 | event->u.Exception.ExceptionRecord.ExceptionAddress)); |
| 396 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
| 397 | break; |
| 398 | case EXCEPTION_BREAKPOINT: |
| 399 | DEBUG_EXCEPT (("gdb: Target exception BREAKPOINT at 0x%08x\n", |
| 400 | event->u.Exception.ExceptionRecord.ExceptionAddress)); |
| 401 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
| 402 | break; |
| 403 | case DBG_CONTROL_C: |
| 404 | DEBUG_EXCEPT (("gdb: Target exception CONTROL_C at 0x%08x\n", |
| 405 | event->u.Exception.ExceptionRecord.ExceptionAddress)); |
| 406 | ourstatus->value.sig = TARGET_SIGNAL_INT; |
| 407 | break; |
| 408 | case EXCEPTION_SINGLE_STEP: |
| 409 | DEBUG_EXCEPT (("gdb: Target exception SINGLE_STEP at 0x%08x\n", |
| 410 | event->u.Exception.ExceptionRecord.ExceptionAddress)); |
| 411 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
| 412 | break; |
| 413 | default: |
| 414 | /* This may be a structured exception handling exception. In |
| 415 | that case, we want to let the program try to handle it, and |
| 416 | only break if we see the exception a second time. */ |
| 417 | if (event->u.Exception.dwFirstChance) |
| 418 | return 0; |
| 419 | |
| 420 | printf_unfiltered ("gdb: unknown target exception 0x%08x at 0x%08x\n", |
| 421 | event->u.Exception.ExceptionRecord.ExceptionCode, |
| 422 | event->u.Exception.ExceptionRecord.ExceptionAddress); |
| 423 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; |
| 424 | break; |
| 425 | } |
| 426 | context.ContextFlags = CONTEXT_FULL | CONTEXT_FLOATING_POINT; |
| 427 | GetThreadContext (current_thread, &context); |
| 428 | exception_count++; |
| 429 | return 1; |
| 430 | } |
| 431 | |
| 432 | static int |
| 433 | child_wait (int pid, struct target_waitstatus *ourstatus) |
| 434 | { |
| 435 | /* We loop when we get a non-standard exception rather than return |
| 436 | with a SPURIOUS because resume can try and step or modify things, |
| 437 | which needs a current_thread. But some of these exceptions mark |
| 438 | the birth or death of threads, which mean that the current thread |
| 439 | isn't necessarily what you think it is. */ |
| 440 | |
| 441 | while (1) |
| 442 | { |
| 443 | DEBUG_EVENT event; |
| 444 | BOOL t = WaitForDebugEvent (&event, INFINITE); |
| 445 | char *p; |
| 446 | DWORD continue_status; |
| 447 | |
| 448 | event_count++; |
| 449 | |
| 450 | current_thread_id = event.dwThreadId; |
| 451 | current_process_id = event.dwProcessId; |
| 452 | |
| 453 | continue_status = DBG_CONTINUE; |
| 454 | |
| 455 | switch (event.dwDebugEventCode) |
| 456 | { |
| 457 | case CREATE_THREAD_DEBUG_EVENT: |
| 458 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 459 | event.dwProcessId, event.dwThreadId, |
| 460 | "CREATE_THREAD_DEBUG_EVENT")); |
| 461 | break; |
| 462 | case EXIT_THREAD_DEBUG_EVENT: |
| 463 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 464 | event.dwProcessId, event.dwThreadId, |
| 465 | "EXIT_THREAD_DEBUG_EVENT")); |
| 466 | break; |
| 467 | case CREATE_PROCESS_DEBUG_EVENT: |
| 468 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 469 | event.dwProcessId, event.dwThreadId, |
| 470 | "CREATE_PROCESS_DEBUG_EVENT")); |
| 471 | break; |
| 472 | |
| 473 | case EXIT_PROCESS_DEBUG_EVENT: |
| 474 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 475 | event.dwProcessId, event.dwThreadId, |
| 476 | "EXIT_PROCESS_DEBUG_EVENT")); |
| 477 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 478 | ourstatus->value.integer = event.u.ExitProcess.dwExitCode; |
| 479 | CloseHandle (current_process); |
| 480 | CloseHandle (current_thread); |
| 481 | return current_process_id; |
| 482 | break; |
| 483 | |
| 484 | case LOAD_DLL_DEBUG_EVENT: |
| 485 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 486 | event.dwProcessId, event.dwThreadId, |
| 487 | "LOAD_DLL_DEBUG_EVENT")); |
| 488 | catch_errors (handle_load_dll, |
| 489 | (char*) &event, |
| 490 | "\n[failed reading symbols from DLL]\n", |
| 491 | RETURN_MASK_ALL); |
| 492 | registers_changed(); /* mark all regs invalid */ |
| 493 | break; |
| 494 | case UNLOAD_DLL_DEBUG_EVENT: |
| 495 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 496 | event.dwProcessId, event.dwThreadId, |
| 497 | "UNLOAD_DLL_DEBUG_EVENT")); |
| 498 | break; /* FIXME: don't know what to do here */ |
| 499 | case EXCEPTION_DEBUG_EVENT: |
| 500 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 501 | event.dwProcessId, event.dwThreadId, |
| 502 | "EXCEPTION_DEBUG_EVENT")); |
| 503 | if (handle_exception (&event, ourstatus)) |
| 504 | return current_process_id; |
| 505 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 506 | break; |
| 507 | |
| 508 | case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */ |
| 509 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 510 | event.dwProcessId, event.dwThreadId, |
| 511 | "OUTPUT_DEBUG_STRING_EVENT")); |
| 512 | if (target_read_string |
| 513 | ((CORE_ADDR) event.u.DebugString.lpDebugStringData, |
| 514 | &p, 1024, 0) && p && *p) |
| 515 | { |
| 516 | warning(p); |
| 517 | free(p); |
| 518 | } |
| 519 | break; |
| 520 | default: |
| 521 | printf_unfiltered ("gdb: kernel event for pid=%d tid=%d\n", |
| 522 | event.dwProcessId, event.dwThreadId); |
| 523 | printf_unfiltered (" unknown event code %d\n", |
| 524 | event.dwDebugEventCode); |
| 525 | break; |
| 526 | } |
| 527 | DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=%d, DBG_CONTINUE);\n", |
| 528 | current_process_id, current_thread_id)); |
| 529 | CHECK (ContinueDebugEvent (current_process_id, |
| 530 | current_thread_id, |
| 531 | continue_status)); |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | /* Attach to process PID, then initialize for debugging it. */ |
| 536 | |
| 537 | static void |
| 538 | child_attach (args, from_tty) |
| 539 | char *args; |
| 540 | int from_tty; |
| 541 | { |
| 542 | BOOL ok; |
| 543 | |
| 544 | if (!args) |
| 545 | error_no_arg ("process-id to attach"); |
| 546 | |
| 547 | current_process_id = strtoul (args, 0, 0); |
| 548 | |
| 549 | ok = DebugActiveProcess (current_process_id); |
| 550 | |
| 551 | if (!ok) |
| 552 | error ("Can't attach to process."); |
| 553 | |
| 554 | exception_count = 0; |
| 555 | event_count = 0; |
| 556 | |
| 557 | if (from_tty) |
| 558 | { |
| 559 | char *exec_file = (char *) get_exec_file (0); |
| 560 | |
| 561 | if (exec_file) |
| 562 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, |
| 563 | target_pid_to_str (current_process_id)); |
| 564 | else |
| 565 | printf_unfiltered ("Attaching to %s\n", |
| 566 | target_pid_to_str (current_process_id)); |
| 567 | |
| 568 | gdb_flush (gdb_stdout); |
| 569 | } |
| 570 | |
| 571 | inferior_pid = current_process_id; |
| 572 | push_target (&child_ops); |
| 573 | } |
| 574 | |
| 575 | static void |
| 576 | child_detach (args, from_tty) |
| 577 | char *args; |
| 578 | int from_tty; |
| 579 | { |
| 580 | if (from_tty) |
| 581 | { |
| 582 | char *exec_file = get_exec_file (0); |
| 583 | if (exec_file == 0) |
| 584 | exec_file = ""; |
| 585 | printf_unfiltered ("Detaching from program: %s %s\n", exec_file, |
| 586 | target_pid_to_str (inferior_pid)); |
| 587 | gdb_flush (gdb_stdout); |
| 588 | } |
| 589 | inferior_pid = 0; |
| 590 | unpush_target (&child_ops); |
| 591 | } |
| 592 | |
| 593 | /* Print status information about what we're accessing. */ |
| 594 | |
| 595 | static void |
| 596 | child_files_info (ignore) |
| 597 | struct target_ops *ignore; |
| 598 | { |
| 599 | printf_unfiltered ("\tUsing the running image of %s %s.\n", |
| 600 | attach_flag ? "attached" : "child", target_pid_to_str (inferior_pid)); |
| 601 | } |
| 602 | |
| 603 | /* ARGSUSED */ |
| 604 | static void |
| 605 | child_open (arg, from_tty) |
| 606 | char *arg; |
| 607 | int from_tty; |
| 608 | { |
| 609 | error ("Use the \"run\" command to start a Unix child process."); |
| 610 | } |
| 611 | |
| 612 | /* Start an inferior win32 child process and sets inferior_pid to its pid. |
| 613 | EXEC_FILE is the file to run. |
| 614 | ALLARGS is a string containing the arguments to the program. |
| 615 | ENV is the environment vector to pass. Errors reported with error(). */ |
| 616 | |
| 617 | static void |
| 618 | child_create_inferior (exec_file, allargs, env) |
| 619 | char *exec_file; |
| 620 | char *allargs; |
| 621 | char **env; |
| 622 | { |
| 623 | char real_path[MAXPATHLEN]; |
| 624 | char *winenv; |
| 625 | char *temp; |
| 626 | int envlen; |
| 627 | int i; |
| 628 | |
| 629 | STARTUPINFO si; |
| 630 | PROCESS_INFORMATION pi; |
| 631 | struct target_waitstatus dummy; |
| 632 | BOOL ret; |
| 633 | DWORD flags; |
| 634 | char *args; |
| 635 | |
| 636 | if (!exec_file) |
| 637 | { |
| 638 | error ("No executable specified, use `target exec'.\n"); |
| 639 | } |
| 640 | |
| 641 | memset (&si, 0, sizeof (si)); |
| 642 | si.cb = sizeof (si); |
| 643 | |
| 644 | cygwin32_conv_to_win32_path (exec_file, real_path); |
| 645 | |
| 646 | flags = DEBUG_ONLY_THIS_PROCESS; |
| 647 | |
| 648 | if (new_group) |
| 649 | flags |= CREATE_NEW_PROCESS_GROUP; |
| 650 | |
| 651 | if (new_console) |
| 652 | flags |= CREATE_NEW_CONSOLE; |
| 653 | |
| 654 | args = alloca (strlen (real_path) + strlen (allargs) + 2); |
| 655 | |
| 656 | strcpy (args, real_path); |
| 657 | |
| 658 | strcat (args, " "); |
| 659 | strcat (args, allargs); |
| 660 | |
| 661 | /* Prepare the environment vars for CreateProcess. */ |
| 662 | { |
| 663 | /* This code use to assume all env vars were file names and would |
| 664 | translate them all to win32 style. That obviously doesn't work in the |
| 665 | general case. The current rule is that we only translate PATH. |
| 666 | We need to handle PATH because we're about to call CreateProcess and |
| 667 | it uses PATH to find DLL's. Fortunately PATH has a well-defined value |
| 668 | in both posix and win32 environments. cygwin.dll will change it back |
| 669 | to posix style if necessary. */ |
| 670 | |
| 671 | static const char *conv_path_names[] = |
| 672 | { |
| 673 | "PATH=", |
| 674 | 0 |
| 675 | }; |
| 676 | |
| 677 | /* CreateProcess takes the environment list as a null terminated set of |
| 678 | strings (i.e. two nulls terminate the list). */ |
| 679 | |
| 680 | /* Get total size for env strings. */ |
| 681 | for (envlen = 0, i = 0; env[i] && *env[i]; i++) |
| 682 | { |
| 683 | int j, len; |
| 684 | |
| 685 | for (j = 0; conv_path_names[j]; j++) |
| 686 | { |
| 687 | len = strlen (conv_path_names[j]); |
| 688 | if (strncmp (conv_path_names[j], env[i], len) == 0) |
| 689 | { |
| 690 | if (cygwin32_posix_path_list_p (env[i] + len)) |
| 691 | envlen += len |
| 692 | + cygwin32_posix_to_win32_path_list_buf_size (env[i] + len); |
| 693 | else |
| 694 | envlen += strlen (env[i]) + 1; |
| 695 | break; |
| 696 | } |
| 697 | } |
| 698 | if (conv_path_names[j] == NULL) |
| 699 | envlen += strlen (env[i]) + 1; |
| 700 | } |
| 701 | |
| 702 | winenv = alloca (envlen + 1); |
| 703 | |
| 704 | /* Copy env strings into new buffer. */ |
| 705 | for (temp = winenv, i = 0; env[i] && *env[i]; i++) |
| 706 | { |
| 707 | int j, len; |
| 708 | |
| 709 | for (j = 0; conv_path_names[j]; j++) |
| 710 | { |
| 711 | len = strlen (conv_path_names[j]); |
| 712 | if (strncmp (conv_path_names[j], env[i], len) == 0) |
| 713 | { |
| 714 | if (cygwin32_posix_path_list_p (env[i] + len)) |
| 715 | { |
| 716 | memcpy (temp, env[i], len); |
| 717 | cygwin32_posix_to_win32_path_list (env[i] + len, temp + len); |
| 718 | } |
| 719 | else |
| 720 | strcpy (temp, env[i]); |
| 721 | break; |
| 722 | } |
| 723 | } |
| 724 | if (conv_path_names[j] == NULL) |
| 725 | strcpy (temp, env[i]); |
| 726 | |
| 727 | temp += strlen (temp) + 1; |
| 728 | } |
| 729 | |
| 730 | /* Final nil string to terminate new env. */ |
| 731 | *temp = 0; |
| 732 | } |
| 733 | |
| 734 | ret = CreateProcess (0, |
| 735 | args, /* command line */ |
| 736 | NULL, /* Security */ |
| 737 | NULL, /* thread */ |
| 738 | TRUE, /* inherit handles */ |
| 739 | flags, /* start flags */ |
| 740 | winenv, |
| 741 | NULL, /* current directory */ |
| 742 | &si, |
| 743 | &pi); |
| 744 | if (!ret) |
| 745 | error ("Error creating process %s, (error %d)\n", exec_file, GetLastError()); |
| 746 | |
| 747 | exception_count = 0; |
| 748 | event_count = 0; |
| 749 | |
| 750 | inferior_pid = pi.dwProcessId; |
| 751 | current_process = pi.hProcess; |
| 752 | current_thread = pi.hThread; |
| 753 | current_process_id = pi.dwProcessId; |
| 754 | current_thread_id = pi.dwThreadId; |
| 755 | push_target (&child_ops); |
| 756 | init_thread_list (); |
| 757 | init_wait_for_inferior (); |
| 758 | clear_proceed_status (); |
| 759 | target_terminal_init (); |
| 760 | target_terminal_inferior (); |
| 761 | |
| 762 | /* Ignore the first trap */ |
| 763 | child_wait (inferior_pid, &dummy); |
| 764 | |
| 765 | proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0); |
| 766 | } |
| 767 | |
| 768 | static void |
| 769 | child_mourn_inferior () |
| 770 | { |
| 771 | (void) ContinueDebugEvent (current_process_id, |
| 772 | current_thread_id, |
| 773 | DBG_CONTINUE); |
| 774 | unpush_target (&child_ops); |
| 775 | generic_mourn_inferior (); |
| 776 | } |
| 777 | |
| 778 | /* Send a SIGINT to the process group. This acts just like the user typed a |
| 779 | ^C on the controlling terminal. */ |
| 780 | |
| 781 | static void |
| 782 | child_stop () |
| 783 | { |
| 784 | DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n")); |
| 785 | CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, 0)); |
| 786 | registers_changed(); /* refresh register state */ |
| 787 | } |
| 788 | |
| 789 | int |
| 790 | child_xfer_memory (CORE_ADDR memaddr, char *our, int len, |
| 791 | int write, struct target_ops *target) |
| 792 | { |
| 793 | DWORD done; |
| 794 | if (write) |
| 795 | { |
| 796 | DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08x\n", |
| 797 | len, memaddr)); |
| 798 | WriteProcessMemory (current_process, memaddr, our, len, &done); |
| 799 | FlushInstructionCache (current_process, memaddr, len); |
| 800 | } |
| 801 | else |
| 802 | { |
| 803 | DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08x\n", |
| 804 | len, memaddr)); |
| 805 | ReadProcessMemory (current_process, memaddr, our, len, &done); |
| 806 | } |
| 807 | return done; |
| 808 | } |
| 809 | |
| 810 | void |
| 811 | child_kill_inferior (void) |
| 812 | { |
| 813 | CHECK (TerminateProcess (current_process, 0)); |
| 814 | |
| 815 | for (;;) |
| 816 | { |
| 817 | DEBUG_EVENT event; |
| 818 | if (!ContinueDebugEvent (current_process_id, |
| 819 | current_thread_id, |
| 820 | DBG_CONTINUE)) |
| 821 | break; |
| 822 | if (!WaitForDebugEvent (&event, INFINITE)) |
| 823 | break; |
| 824 | current_thread_id = event.dwThreadId; |
| 825 | current_process_id = event.dwProcessId; |
| 826 | if (event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) |
| 827 | break; |
| 828 | } |
| 829 | |
| 830 | CHECK (CloseHandle (current_process)); |
| 831 | CHECK (CloseHandle (current_thread)); |
| 832 | target_mourn_inferior(); /* or just child_mourn_inferior? */ |
| 833 | } |
| 834 | |
| 835 | void |
| 836 | child_resume (int pid, int step, enum target_signal signal) |
| 837 | { |
| 838 | DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, signal=%d);\n", |
| 839 | pid, step, signal)); |
| 840 | |
| 841 | if (step) |
| 842 | { |
| 843 | #ifdef __PPC__ |
| 844 | warning ("Single stepping not done.\n"); |
| 845 | #endif |
| 846 | #ifdef i386 |
| 847 | /* Single step by setting t bit */ |
| 848 | child_fetch_inferior_registers (PS_REGNUM); |
| 849 | context.EFlags |= FLAG_TRACE_BIT; |
| 850 | #endif |
| 851 | } |
| 852 | |
| 853 | if (context.ContextFlags) |
| 854 | { |
| 855 | CHECK (SetThreadContext (current_thread, &context)); |
| 856 | context.ContextFlags = 0; |
| 857 | } |
| 858 | |
| 859 | if (signal) |
| 860 | { |
| 861 | fprintf_unfiltered (gdb_stderr, "Can't send signals to the child.\n"); |
| 862 | } |
| 863 | |
| 864 | DEBUG_EVENTS (("gdb: ContinueDebugEvent (cpid=%d, ctid=%d, DBG_CONTINUE);\n", |
| 865 | current_process_id, current_thread_id)); |
| 866 | CHECK (ContinueDebugEvent (current_process_id, |
| 867 | current_thread_id, |
| 868 | DBG_CONTINUE)); |
| 869 | } |
| 870 | |
| 871 | static void |
| 872 | child_prepare_to_store () |
| 873 | { |
| 874 | /* Do nothing, since we can store individual regs */ |
| 875 | } |
| 876 | |
| 877 | static int |
| 878 | child_can_run () |
| 879 | { |
| 880 | return 1; |
| 881 | } |
| 882 | |
| 883 | static void |
| 884 | child_close () |
| 885 | { |
| 886 | DEBUG_EVENTS (("gdb: child_close, inferior_pid=%d\n", inferior_pid)); |
| 887 | } |
| 888 | |
| 889 | struct target_ops child_ops ; |
| 890 | |
| 891 | static void init_child_ops(void) |
| 892 | { |
| 893 | child_ops.to_shortname = "child"; |
| 894 | child_ops.to_longname = "Win32 child process"; |
| 895 | child_ops.to_doc = "Win32 child process (started by the \"run\" command)."; |
| 896 | child_ops.to_open = child_open; |
| 897 | child_ops.to_close = child_close; |
| 898 | child_ops.to_attach = child_attach; |
| 899 | child_ops.to_detach = child_detach; |
| 900 | child_ops.to_resume = child_resume; |
| 901 | child_ops.to_wait = child_wait; |
| 902 | child_ops.to_fetch_registers = child_fetch_inferior_registers; |
| 903 | child_ops.to_store_registers = child_store_inferior_registers; |
| 904 | child_ops.to_prepare_to_store = child_prepare_to_store; |
| 905 | child_ops.to_xfer_memory = child_xfer_memory; |
| 906 | child_ops.to_files_info = child_files_info; |
| 907 | child_ops.to_insert_breakpoint = memory_insert_breakpoint; |
| 908 | child_ops.to_remove_breakpoint = memory_remove_breakpoint; |
| 909 | child_ops.to_terminal_init = terminal_init_inferior; |
| 910 | child_ops.to_terminal_inferior = terminal_inferior; |
| 911 | child_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
| 912 | child_ops.to_terminal_ours = terminal_ours; |
| 913 | child_ops.to_terminal_info = child_terminal_info; |
| 914 | child_ops.to_kill = child_kill_inferior; |
| 915 | child_ops.to_load = 0; |
| 916 | child_ops.to_lookup_symbol = 0; |
| 917 | child_ops.to_create_inferior = child_create_inferior; |
| 918 | child_ops.to_mourn_inferior = child_mourn_inferior; |
| 919 | child_ops.to_can_run = child_can_run; |
| 920 | child_ops.to_notice_signals = 0; |
| 921 | child_ops.to_thread_alive = 0; |
| 922 | child_ops.to_stop = child_stop; |
| 923 | child_ops.to_stratum = process_stratum; |
| 924 | child_ops.DONT_USE = 0; |
| 925 | child_ops.to_has_all_memory = 1; |
| 926 | child_ops.to_has_memory = 1; |
| 927 | child_ops.to_has_stack = 1; |
| 928 | child_ops.to_has_registers = 1; |
| 929 | child_ops.to_has_execution = 1; |
| 930 | child_ops.to_sections = 0; |
| 931 | child_ops.to_sections_end = 0; |
| 932 | child_ops.to_magic = OPS_MAGIC; |
| 933 | } |
| 934 | |
| 935 | void |
| 936 | _initialize_inftarg () |
| 937 | { |
| 938 | struct cmd_list_element *c; |
| 939 | init_child_ops() ; |
| 940 | |
| 941 | add_show_from_set |
| 942 | (add_set_cmd ("new-console", class_support, var_boolean, |
| 943 | (char *) &new_console, |
| 944 | "Set creation of new console when creating child process.", |
| 945 | &setlist), |
| 946 | &showlist); |
| 947 | |
| 948 | add_show_from_set |
| 949 | (add_set_cmd ("new-group", class_support, var_boolean, |
| 950 | (char *) &new_group, |
| 951 | "Set creation of new group when creating child process.", |
| 952 | &setlist), |
| 953 | &showlist); |
| 954 | |
| 955 | add_show_from_set |
| 956 | (add_set_cmd ("debugexec", class_support, var_boolean, |
| 957 | (char *) &debug_exec, |
| 958 | "Set whether to display execution in child process.", |
| 959 | &setlist), |
| 960 | &showlist); |
| 961 | |
| 962 | add_show_from_set |
| 963 | (add_set_cmd ("debugevents", class_support, var_boolean, |
| 964 | (char *) &debug_events, |
| 965 | "Set whether to display kernel events in child process.", |
| 966 | &setlist), |
| 967 | &showlist); |
| 968 | |
| 969 | add_show_from_set |
| 970 | (add_set_cmd ("debugmemory", class_support, var_boolean, |
| 971 | (char *) &debug_memory, |
| 972 | "Set whether to display memory accesses in child process.", |
| 973 | &setlist), |
| 974 | &showlist); |
| 975 | |
| 976 | add_show_from_set |
| 977 | (add_set_cmd ("debugexceptions", class_support, var_boolean, |
| 978 | (char *) &debug_exceptions, |
| 979 | "Set whether to display kernel exceptions in child process.", |
| 980 | &setlist), |
| 981 | &showlist); |
| 982 | |
| 983 | add_target (&child_ops); |
| 984 | } |