| 1 | /* Low level interface to Windows debugging, for gdbserver. |
| 2 | Copyright (C) 2006-2020 Free Software Foundation, Inc. |
| 3 | |
| 4 | Contributed by Leo Zayas. Based on "win32-nat.c" from GDB. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "server.h" |
| 22 | #include "regcache.h" |
| 23 | #include "gdb/fileio.h" |
| 24 | #include "mem-break.h" |
| 25 | #include "win32-low.h" |
| 26 | #include "gdbthread.h" |
| 27 | #include "dll.h" |
| 28 | #include "hostio.h" |
| 29 | #include <windows.h> |
| 30 | #include <winnt.h> |
| 31 | #include <imagehlp.h> |
| 32 | #include <tlhelp32.h> |
| 33 | #include <psapi.h> |
| 34 | #include <process.h> |
| 35 | #include "gdbsupport/gdb_tilde_expand.h" |
| 36 | #include "gdbsupport/common-inferior.h" |
| 37 | #include "gdbsupport/gdb_wait.h" |
| 38 | |
| 39 | using namespace windows_nat; |
| 40 | |
| 41 | #ifndef USE_WIN32API |
| 42 | #include <sys/cygwin.h> |
| 43 | #endif |
| 44 | |
| 45 | #define OUTMSG(X) do { printf X; fflush (stderr); } while (0) |
| 46 | |
| 47 | #define OUTMSG2(X) \ |
| 48 | do \ |
| 49 | { \ |
| 50 | if (debug_threads) \ |
| 51 | { \ |
| 52 | printf X; \ |
| 53 | fflush (stderr); \ |
| 54 | } \ |
| 55 | } while (0) |
| 56 | |
| 57 | #ifndef _T |
| 58 | #define _T(x) TEXT (x) |
| 59 | #endif |
| 60 | |
| 61 | #ifndef COUNTOF |
| 62 | #define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0])) |
| 63 | #endif |
| 64 | |
| 65 | #ifdef _WIN32_WCE |
| 66 | # define GETPROCADDRESS(DLL, PROC) \ |
| 67 | ((winapi_ ## PROC) GetProcAddress (DLL, TEXT (#PROC))) |
| 68 | #else |
| 69 | # define GETPROCADDRESS(DLL, PROC) \ |
| 70 | ((winapi_ ## PROC) GetProcAddress (DLL, #PROC)) |
| 71 | #endif |
| 72 | |
| 73 | int using_threads = 1; |
| 74 | |
| 75 | /* Globals. */ |
| 76 | static int attaching = 0; |
| 77 | |
| 78 | /* A status that hasn't been reported to the core yet, and so |
| 79 | win32_wait should return it next, instead of fetching the next |
| 80 | debug event off the win32 API. */ |
| 81 | static struct target_waitstatus cached_status; |
| 82 | |
| 83 | /* Non zero if an interrupt request is to be satisfied by suspending |
| 84 | all threads. */ |
| 85 | static int soft_interrupt_requested = 0; |
| 86 | |
| 87 | /* Non zero if the inferior is stopped in a simulated breakpoint done |
| 88 | by suspending all the threads. */ |
| 89 | static int faked_breakpoint = 0; |
| 90 | |
| 91 | #ifdef __x86_64__ |
| 92 | bool wow64_process = false; |
| 93 | #endif |
| 94 | |
| 95 | const struct target_desc *win32_tdesc; |
| 96 | #ifdef __x86_64__ |
| 97 | const struct target_desc *wow64_win32_tdesc; |
| 98 | #endif |
| 99 | |
| 100 | #define NUM_REGS (the_low_target.num_regs ()) |
| 101 | |
| 102 | typedef BOOL (WINAPI *winapi_DebugActiveProcessStop) (DWORD dwProcessId); |
| 103 | typedef BOOL (WINAPI *winapi_DebugSetProcessKillOnExit) (BOOL KillOnExit); |
| 104 | typedef BOOL (WINAPI *winapi_DebugBreakProcess) (HANDLE); |
| 105 | typedef BOOL (WINAPI *winapi_GenerateConsoleCtrlEvent) (DWORD, DWORD); |
| 106 | |
| 107 | #ifdef __x86_64__ |
| 108 | typedef BOOL (WINAPI *winapi_Wow64SetThreadContext) (HANDLE, |
| 109 | const WOW64_CONTEXT *); |
| 110 | |
| 111 | winapi_Wow64GetThreadContext win32_Wow64GetThreadContext; |
| 112 | static winapi_Wow64SetThreadContext win32_Wow64SetThreadContext; |
| 113 | #endif |
| 114 | |
| 115 | #ifndef _WIN32_WCE |
| 116 | static void win32_add_all_dlls (void); |
| 117 | #endif |
| 118 | |
| 119 | /* Get the thread ID from the current selected inferior (the current |
| 120 | thread). */ |
| 121 | static ptid_t |
| 122 | current_thread_ptid (void) |
| 123 | { |
| 124 | return current_ptid; |
| 125 | } |
| 126 | |
| 127 | /* The current debug event from WaitForDebugEvent. */ |
| 128 | static ptid_t |
| 129 | debug_event_ptid (DEBUG_EVENT *event) |
| 130 | { |
| 131 | return ptid_t (event->dwProcessId, event->dwThreadId, 0); |
| 132 | } |
| 133 | |
| 134 | /* Get the thread context of the thread associated with TH. */ |
| 135 | |
| 136 | static void |
| 137 | win32_get_thread_context (windows_thread_info *th) |
| 138 | { |
| 139 | #ifdef __x86_64__ |
| 140 | if (wow64_process) |
| 141 | memset (&th->wow64_context, 0, sizeof (WOW64_CONTEXT)); |
| 142 | else |
| 143 | #endif |
| 144 | memset (&th->context, 0, sizeof (CONTEXT)); |
| 145 | (*the_low_target.get_thread_context) (th); |
| 146 | #ifdef _WIN32_WCE |
| 147 | memcpy (&th->base_context, &th->context, sizeof (CONTEXT)); |
| 148 | #endif |
| 149 | } |
| 150 | |
| 151 | /* Set the thread context of the thread associated with TH. */ |
| 152 | |
| 153 | static void |
| 154 | win32_set_thread_context (windows_thread_info *th) |
| 155 | { |
| 156 | #ifdef _WIN32_WCE |
| 157 | /* Calling SuspendThread on a thread that is running kernel code |
| 158 | will report that the suspending was successful, but in fact, that |
| 159 | will often not be true. In those cases, the context returned by |
| 160 | GetThreadContext will not be correct by the time the thread |
| 161 | stops, hence we can't set that context back into the thread when |
| 162 | resuming - it will most likely crash the inferior. |
| 163 | Unfortunately, there is no way to know when the thread will |
| 164 | really stop. To work around it, we'll only write the context |
| 165 | back to the thread when either the user or GDB explicitly change |
| 166 | it between stopping and resuming. */ |
| 167 | if (memcmp (&th->context, &th->base_context, sizeof (CONTEXT)) != 0) |
| 168 | #endif |
| 169 | { |
| 170 | #ifdef __x86_64__ |
| 171 | if (wow64_process) |
| 172 | win32_Wow64SetThreadContext (th->h, &th->wow64_context); |
| 173 | else |
| 174 | #endif |
| 175 | SetThreadContext (th->h, &th->context); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | /* Set the thread context of the thread associated with TH. */ |
| 180 | |
| 181 | static void |
| 182 | win32_prepare_to_resume (windows_thread_info *th) |
| 183 | { |
| 184 | if (the_low_target.prepare_to_resume != NULL) |
| 185 | (*the_low_target.prepare_to_resume) (th); |
| 186 | } |
| 187 | |
| 188 | /* See win32-low.h. */ |
| 189 | |
| 190 | void |
| 191 | win32_require_context (windows_thread_info *th) |
| 192 | { |
| 193 | DWORD context_flags; |
| 194 | #ifdef __x86_64__ |
| 195 | if (wow64_process) |
| 196 | context_flags = th->wow64_context.ContextFlags; |
| 197 | else |
| 198 | #endif |
| 199 | context_flags = th->context.ContextFlags; |
| 200 | if (context_flags == 0) |
| 201 | { |
| 202 | th->suspend (); |
| 203 | win32_get_thread_context (th); |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | /* See nat/windows-nat.h. */ |
| 208 | |
| 209 | windows_thread_info * |
| 210 | windows_nat::thread_rec (ptid_t ptid, thread_disposition_type disposition) |
| 211 | { |
| 212 | thread_info *thread = find_thread_ptid (ptid); |
| 213 | if (thread == NULL) |
| 214 | return NULL; |
| 215 | |
| 216 | windows_thread_info *th = (windows_thread_info *) thread_target_data (thread); |
| 217 | if (disposition != DONT_INVALIDATE_CONTEXT) |
| 218 | win32_require_context (th); |
| 219 | return th; |
| 220 | } |
| 221 | |
| 222 | /* Add a thread to the thread list. */ |
| 223 | static windows_thread_info * |
| 224 | child_add_thread (DWORD pid, DWORD tid, HANDLE h, void *tlb) |
| 225 | { |
| 226 | windows_thread_info *th; |
| 227 | ptid_t ptid = ptid_t (pid, tid, 0); |
| 228 | |
| 229 | if ((th = thread_rec (ptid, DONT_INVALIDATE_CONTEXT))) |
| 230 | return th; |
| 231 | |
| 232 | CORE_ADDR base = (CORE_ADDR) (uintptr_t) tlb; |
| 233 | #ifdef __x86_64__ |
| 234 | /* For WOW64 processes, this is actually the pointer to the 64bit TIB, |
| 235 | and the 32bit TIB is exactly 2 pages after it. */ |
| 236 | if (wow64_process) |
| 237 | base += 2 * 4096; /* page size = 4096 */ |
| 238 | #endif |
| 239 | th = new windows_thread_info (tid, h, base); |
| 240 | |
| 241 | add_thread (ptid, th); |
| 242 | |
| 243 | if (the_low_target.thread_added != NULL) |
| 244 | (*the_low_target.thread_added) (th); |
| 245 | |
| 246 | return th; |
| 247 | } |
| 248 | |
| 249 | /* Delete a thread from the list of threads. */ |
| 250 | static void |
| 251 | delete_thread_info (thread_info *thread) |
| 252 | { |
| 253 | windows_thread_info *th = (windows_thread_info *) thread_target_data (thread); |
| 254 | |
| 255 | remove_thread (thread); |
| 256 | delete th; |
| 257 | } |
| 258 | |
| 259 | /* Delete a thread from the list of threads. */ |
| 260 | static void |
| 261 | child_delete_thread (DWORD pid, DWORD tid) |
| 262 | { |
| 263 | /* If the last thread is exiting, just return. */ |
| 264 | if (all_threads.size () == 1) |
| 265 | return; |
| 266 | |
| 267 | thread_info *thread = find_thread_ptid (ptid_t (pid, tid)); |
| 268 | if (thread == NULL) |
| 269 | return; |
| 270 | |
| 271 | delete_thread_info (thread); |
| 272 | } |
| 273 | |
| 274 | /* These watchpoint related wrapper functions simply pass on the function call |
| 275 | if the low target has registered a corresponding function. */ |
| 276 | |
| 277 | bool |
| 278 | win32_process_target::supports_z_point_type (char z_type) |
| 279 | { |
| 280 | return (z_type == Z_PACKET_SW_BP |
| 281 | || (the_low_target.supports_z_point_type != NULL |
| 282 | && the_low_target.supports_z_point_type (z_type))); |
| 283 | } |
| 284 | |
| 285 | int |
| 286 | win32_process_target::insert_point (enum raw_bkpt_type type, CORE_ADDR addr, |
| 287 | int size, raw_breakpoint *bp) |
| 288 | { |
| 289 | if (type == raw_bkpt_type_sw) |
| 290 | return insert_memory_breakpoint (bp); |
| 291 | else if (the_low_target.insert_point != NULL) |
| 292 | return the_low_target.insert_point (type, addr, size, bp); |
| 293 | else |
| 294 | /* Unsupported (see target.h). */ |
| 295 | return 1; |
| 296 | } |
| 297 | |
| 298 | int |
| 299 | win32_process_target::remove_point (enum raw_bkpt_type type, CORE_ADDR addr, |
| 300 | int size, raw_breakpoint *bp) |
| 301 | { |
| 302 | if (type == raw_bkpt_type_sw) |
| 303 | return remove_memory_breakpoint (bp); |
| 304 | else if (the_low_target.remove_point != NULL) |
| 305 | return the_low_target.remove_point (type, addr, size, bp); |
| 306 | else |
| 307 | /* Unsupported (see target.h). */ |
| 308 | return 1; |
| 309 | } |
| 310 | |
| 311 | bool |
| 312 | win32_process_target::stopped_by_watchpoint () |
| 313 | { |
| 314 | if (the_low_target.stopped_by_watchpoint != NULL) |
| 315 | return the_low_target.stopped_by_watchpoint (); |
| 316 | else |
| 317 | return false; |
| 318 | } |
| 319 | |
| 320 | CORE_ADDR |
| 321 | win32_process_target::stopped_data_address () |
| 322 | { |
| 323 | if (the_low_target.stopped_data_address != NULL) |
| 324 | return the_low_target.stopped_data_address (); |
| 325 | else |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | |
| 330 | /* Transfer memory from/to the debugged process. */ |
| 331 | static int |
| 332 | child_xfer_memory (CORE_ADDR memaddr, char *our, int len, |
| 333 | int write, process_stratum_target *target) |
| 334 | { |
| 335 | BOOL success; |
| 336 | SIZE_T done = 0; |
| 337 | DWORD lasterror = 0; |
| 338 | uintptr_t addr = (uintptr_t) memaddr; |
| 339 | |
| 340 | if (write) |
| 341 | { |
| 342 | success = WriteProcessMemory (current_process_handle, (LPVOID) addr, |
| 343 | (LPCVOID) our, len, &done); |
| 344 | if (!success) |
| 345 | lasterror = GetLastError (); |
| 346 | FlushInstructionCache (current_process_handle, (LPCVOID) addr, len); |
| 347 | } |
| 348 | else |
| 349 | { |
| 350 | success = ReadProcessMemory (current_process_handle, (LPCVOID) addr, |
| 351 | (LPVOID) our, len, &done); |
| 352 | if (!success) |
| 353 | lasterror = GetLastError (); |
| 354 | } |
| 355 | if (!success && lasterror == ERROR_PARTIAL_COPY && done > 0) |
| 356 | return done; |
| 357 | else |
| 358 | return success ? done : -1; |
| 359 | } |
| 360 | |
| 361 | /* Clear out any old thread list and reinitialize it to a pristine |
| 362 | state. */ |
| 363 | static void |
| 364 | child_init_thread_list (void) |
| 365 | { |
| 366 | for_each_thread (delete_thread_info); |
| 367 | } |
| 368 | |
| 369 | /* Zero during the child initialization phase, and nonzero otherwise. */ |
| 370 | |
| 371 | static int child_initialization_done = 0; |
| 372 | |
| 373 | static void |
| 374 | do_initial_child_stuff (HANDLE proch, DWORD pid, int attached) |
| 375 | { |
| 376 | struct process_info *proc; |
| 377 | |
| 378 | last_sig = GDB_SIGNAL_0; |
| 379 | |
| 380 | current_process_handle = proch; |
| 381 | current_process_id = pid; |
| 382 | main_thread_id = 0; |
| 383 | |
| 384 | soft_interrupt_requested = 0; |
| 385 | faked_breakpoint = 0; |
| 386 | |
| 387 | memset (¤t_event, 0, sizeof (current_event)); |
| 388 | |
| 389 | #ifdef __x86_64__ |
| 390 | BOOL wow64; |
| 391 | if (!IsWow64Process (proch, &wow64)) |
| 392 | { |
| 393 | DWORD err = GetLastError (); |
| 394 | error ("Check if WOW64 process failed (error %d): %s\n", |
| 395 | (int) err, strwinerror (err)); |
| 396 | } |
| 397 | wow64_process = wow64; |
| 398 | |
| 399 | if (wow64_process |
| 400 | && (win32_Wow64GetThreadContext == nullptr |
| 401 | || win32_Wow64SetThreadContext == nullptr)) |
| 402 | error ("WOW64 debugging is not supported on this system.\n"); |
| 403 | |
| 404 | ignore_first_breakpoint = !attached && wow64_process; |
| 405 | #endif |
| 406 | |
| 407 | proc = add_process (pid, attached); |
| 408 | #ifdef __x86_64__ |
| 409 | if (wow64_process) |
| 410 | proc->tdesc = wow64_win32_tdesc; |
| 411 | else |
| 412 | #endif |
| 413 | proc->tdesc = win32_tdesc; |
| 414 | child_init_thread_list (); |
| 415 | child_initialization_done = 0; |
| 416 | |
| 417 | if (the_low_target.initial_stuff != NULL) |
| 418 | (*the_low_target.initial_stuff) (); |
| 419 | |
| 420 | cached_status.kind = TARGET_WAITKIND_IGNORE; |
| 421 | |
| 422 | /* Flush all currently pending debug events (thread and dll list) up |
| 423 | to the initial breakpoint. */ |
| 424 | while (1) |
| 425 | { |
| 426 | struct target_waitstatus status; |
| 427 | |
| 428 | the_target->wait (minus_one_ptid, &status, 0); |
| 429 | |
| 430 | /* Note win32_wait doesn't return thread events. */ |
| 431 | if (status.kind != TARGET_WAITKIND_LOADED) |
| 432 | { |
| 433 | cached_status = status; |
| 434 | break; |
| 435 | } |
| 436 | |
| 437 | { |
| 438 | struct thread_resume resume; |
| 439 | |
| 440 | resume.thread = minus_one_ptid; |
| 441 | resume.kind = resume_continue; |
| 442 | resume.sig = 0; |
| 443 | |
| 444 | the_target->resume (&resume, 1); |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | #ifndef _WIN32_WCE |
| 449 | /* Now that the inferior has been started and all DLLs have been mapped, |
| 450 | we can iterate over all DLLs and load them in. |
| 451 | |
| 452 | We avoid doing it any earlier because, on certain versions of Windows, |
| 453 | LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular, |
| 454 | we have seen on Windows 8.1 that the ntdll.dll load event does not |
| 455 | include the DLL name, preventing us from creating an associated SO. |
| 456 | A possible explanation is that ntdll.dll might be mapped before |
| 457 | the SO info gets created by the Windows system -- ntdll.dll is |
| 458 | the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs |
| 459 | do not seem to suffer from that problem. |
| 460 | |
| 461 | Rather than try to work around this sort of issue, it is much |
| 462 | simpler to just ignore DLL load/unload events during the startup |
| 463 | phase, and then process them all in one batch now. */ |
| 464 | win32_add_all_dlls (); |
| 465 | #endif |
| 466 | |
| 467 | child_initialization_done = 1; |
| 468 | } |
| 469 | |
| 470 | /* Resume all artificially suspended threads if we are continuing |
| 471 | execution. */ |
| 472 | static void |
| 473 | continue_one_thread (thread_info *thread, int thread_id) |
| 474 | { |
| 475 | windows_thread_info *th = (windows_thread_info *) thread_target_data (thread); |
| 476 | |
| 477 | if (thread_id == -1 || thread_id == th->tid) |
| 478 | { |
| 479 | win32_prepare_to_resume (th); |
| 480 | |
| 481 | if (th->suspended) |
| 482 | { |
| 483 | DWORD *context_flags; |
| 484 | #ifdef __x86_64__ |
| 485 | if (wow64_process) |
| 486 | context_flags = &th->wow64_context.ContextFlags; |
| 487 | else |
| 488 | #endif |
| 489 | context_flags = &th->context.ContextFlags; |
| 490 | if (*context_flags) |
| 491 | { |
| 492 | win32_set_thread_context (th); |
| 493 | *context_flags = 0; |
| 494 | } |
| 495 | |
| 496 | th->resume (); |
| 497 | } |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | static BOOL |
| 502 | child_continue (DWORD continue_status, int thread_id) |
| 503 | { |
| 504 | desired_stop_thread_id = thread_id; |
| 505 | if (matching_pending_stop (debug_threads)) |
| 506 | return TRUE; |
| 507 | |
| 508 | /* The inferior will only continue after the ContinueDebugEvent |
| 509 | call. */ |
| 510 | for_each_thread ([&] (thread_info *thread) |
| 511 | { |
| 512 | continue_one_thread (thread, thread_id); |
| 513 | }); |
| 514 | faked_breakpoint = 0; |
| 515 | |
| 516 | return continue_last_debug_event (continue_status, debug_threads); |
| 517 | } |
| 518 | |
| 519 | /* Fetch register(s) from the current thread context. */ |
| 520 | static void |
| 521 | child_fetch_inferior_registers (struct regcache *regcache, int r) |
| 522 | { |
| 523 | int regno; |
| 524 | windows_thread_info *th = thread_rec (current_thread_ptid (), |
| 525 | INVALIDATE_CONTEXT); |
| 526 | if (r == -1 || r > NUM_REGS) |
| 527 | child_fetch_inferior_registers (regcache, NUM_REGS); |
| 528 | else |
| 529 | for (regno = 0; regno < r; regno++) |
| 530 | (*the_low_target.fetch_inferior_register) (regcache, th, regno); |
| 531 | } |
| 532 | |
| 533 | /* Store a new register value into the current thread context. We don't |
| 534 | change the program's context until later, when we resume it. */ |
| 535 | static void |
| 536 | child_store_inferior_registers (struct regcache *regcache, int r) |
| 537 | { |
| 538 | int regno; |
| 539 | windows_thread_info *th = thread_rec (current_thread_ptid (), |
| 540 | INVALIDATE_CONTEXT); |
| 541 | if (r == -1 || r == 0 || r > NUM_REGS) |
| 542 | child_store_inferior_registers (regcache, NUM_REGS); |
| 543 | else |
| 544 | for (regno = 0; regno < r; regno++) |
| 545 | (*the_low_target.store_inferior_register) (regcache, th, regno); |
| 546 | } |
| 547 | |
| 548 | /* Map the Windows error number in ERROR to a locale-dependent error |
| 549 | message string and return a pointer to it. Typically, the values |
| 550 | for ERROR come from GetLastError. |
| 551 | |
| 552 | The string pointed to shall not be modified by the application, |
| 553 | but may be overwritten by a subsequent call to strwinerror |
| 554 | |
| 555 | The strwinerror function does not change the current setting |
| 556 | of GetLastError. */ |
| 557 | |
| 558 | char * |
| 559 | strwinerror (DWORD error) |
| 560 | { |
| 561 | static char buf[1024]; |
| 562 | TCHAR *msgbuf; |
| 563 | DWORD lasterr = GetLastError (); |
| 564 | DWORD chars = FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM |
| 565 | | FORMAT_MESSAGE_ALLOCATE_BUFFER, |
| 566 | NULL, |
| 567 | error, |
| 568 | 0, /* Default language */ |
| 569 | (LPTSTR) &msgbuf, |
| 570 | 0, |
| 571 | NULL); |
| 572 | if (chars != 0) |
| 573 | { |
| 574 | /* If there is an \r\n appended, zap it. */ |
| 575 | if (chars >= 2 |
| 576 | && msgbuf[chars - 2] == '\r' |
| 577 | && msgbuf[chars - 1] == '\n') |
| 578 | { |
| 579 | chars -= 2; |
| 580 | msgbuf[chars] = 0; |
| 581 | } |
| 582 | |
| 583 | if (chars > ((COUNTOF (buf)) - 1)) |
| 584 | { |
| 585 | chars = COUNTOF (buf) - 1; |
| 586 | msgbuf [chars] = 0; |
| 587 | } |
| 588 | |
| 589 | #ifdef UNICODE |
| 590 | wcstombs (buf, msgbuf, chars + 1); |
| 591 | #else |
| 592 | strncpy (buf, msgbuf, chars + 1); |
| 593 | #endif |
| 594 | LocalFree (msgbuf); |
| 595 | } |
| 596 | else |
| 597 | sprintf (buf, "unknown win32 error (%u)", (unsigned) error); |
| 598 | |
| 599 | SetLastError (lasterr); |
| 600 | return buf; |
| 601 | } |
| 602 | |
| 603 | static BOOL |
| 604 | create_process (const char *program, char *args, |
| 605 | DWORD flags, PROCESS_INFORMATION *pi) |
| 606 | { |
| 607 | const char *inferior_cwd = get_inferior_cwd (); |
| 608 | BOOL ret; |
| 609 | size_t argslen, proglen; |
| 610 | |
| 611 | proglen = strlen (program) + 1; |
| 612 | argslen = strlen (args) + proglen; |
| 613 | |
| 614 | #ifdef _WIN32_WCE |
| 615 | wchar_t *p, *wprogram, *wargs, *wcwd = NULL; |
| 616 | |
| 617 | wprogram = (wchar_t *) alloca (proglen * sizeof (wchar_t)); |
| 618 | mbstowcs (wprogram, program, proglen); |
| 619 | |
| 620 | for (p = wprogram; *p; ++p) |
| 621 | if (L'/' == *p) |
| 622 | *p = L'\\'; |
| 623 | |
| 624 | wargs = alloca ((argslen + 1) * sizeof (wchar_t)); |
| 625 | wcscpy (wargs, wprogram); |
| 626 | wcscat (wargs, L" "); |
| 627 | mbstowcs (wargs + proglen, args, argslen + 1 - proglen); |
| 628 | |
| 629 | if (inferior_cwd != NULL) |
| 630 | { |
| 631 | std::string expanded_infcwd = gdb_tilde_expand (inferior_cwd); |
| 632 | std::replace (expanded_infcwd.begin (), expanded_infcwd.end (), |
| 633 | '/', '\\'); |
| 634 | wcwd = alloca ((expanded_infcwd.size () + 1) * sizeof (wchar_t)); |
| 635 | if (mbstowcs (wcwd, expanded_infcwd.c_str (), |
| 636 | expanded_infcwd.size () + 1) == NULL) |
| 637 | { |
| 638 | error (_("\ |
| 639 | Could not convert the expanded inferior cwd to wide-char.")); |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | ret = CreateProcessW (wprogram, /* image name */ |
| 644 | wargs, /* command line */ |
| 645 | NULL, /* security, not supported */ |
| 646 | NULL, /* thread, not supported */ |
| 647 | FALSE, /* inherit handles, not supported */ |
| 648 | flags, /* start flags */ |
| 649 | NULL, /* environment, not supported */ |
| 650 | wcwd, /* current directory */ |
| 651 | NULL, /* start info, not supported */ |
| 652 | pi); /* proc info */ |
| 653 | #else |
| 654 | STARTUPINFOA si = { sizeof (STARTUPINFOA) }; |
| 655 | char *program_and_args = (char *) alloca (argslen + 1); |
| 656 | |
| 657 | strcpy (program_and_args, program); |
| 658 | strcat (program_and_args, " "); |
| 659 | strcat (program_and_args, args); |
| 660 | ret = CreateProcessA (program, /* image name */ |
| 661 | program_and_args, /* command line */ |
| 662 | NULL, /* security */ |
| 663 | NULL, /* thread */ |
| 664 | TRUE, /* inherit handles */ |
| 665 | flags, /* start flags */ |
| 666 | NULL, /* environment */ |
| 667 | /* current directory */ |
| 668 | (inferior_cwd == NULL |
| 669 | ? NULL |
| 670 | : gdb_tilde_expand (inferior_cwd).c_str()), |
| 671 | &si, /* start info */ |
| 672 | pi); /* proc info */ |
| 673 | #endif |
| 674 | |
| 675 | return ret; |
| 676 | } |
| 677 | |
| 678 | /* Start a new process. |
| 679 | PROGRAM is the program name. |
| 680 | PROGRAM_ARGS is the vector containing the inferior's args. |
| 681 | Returns the new PID on success, -1 on failure. Registers the new |
| 682 | process with the process list. */ |
| 683 | int |
| 684 | win32_process_target::create_inferior (const char *program, |
| 685 | const std::vector<char *> &program_args) |
| 686 | { |
| 687 | client_state &cs = get_client_state (); |
| 688 | #ifndef USE_WIN32API |
| 689 | char real_path[PATH_MAX]; |
| 690 | char *orig_path, *new_path, *path_ptr; |
| 691 | #endif |
| 692 | BOOL ret; |
| 693 | DWORD flags; |
| 694 | PROCESS_INFORMATION pi; |
| 695 | DWORD err; |
| 696 | std::string str_program_args = stringify_argv (program_args); |
| 697 | char *args = (char *) str_program_args.c_str (); |
| 698 | |
| 699 | /* win32_wait needs to know we're not attaching. */ |
| 700 | attaching = 0; |
| 701 | |
| 702 | if (!program) |
| 703 | error ("No executable specified, specify executable to debug.\n"); |
| 704 | |
| 705 | flags = DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS; |
| 706 | |
| 707 | #ifndef USE_WIN32API |
| 708 | orig_path = NULL; |
| 709 | path_ptr = getenv ("PATH"); |
| 710 | if (path_ptr) |
| 711 | { |
| 712 | int size = cygwin_conv_path_list (CCP_POSIX_TO_WIN_A, path_ptr, NULL, 0); |
| 713 | orig_path = (char *) alloca (strlen (path_ptr) + 1); |
| 714 | new_path = (char *) alloca (size); |
| 715 | strcpy (orig_path, path_ptr); |
| 716 | cygwin_conv_path_list (CCP_POSIX_TO_WIN_A, path_ptr, new_path, size); |
| 717 | setenv ("PATH", new_path, 1); |
| 718 | } |
| 719 | cygwin_conv_path (CCP_POSIX_TO_WIN_A, program, real_path, PATH_MAX); |
| 720 | program = real_path; |
| 721 | #endif |
| 722 | |
| 723 | OUTMSG2 (("Command line is \"%s %s\"\n", program, args)); |
| 724 | |
| 725 | #ifdef CREATE_NEW_PROCESS_GROUP |
| 726 | flags |= CREATE_NEW_PROCESS_GROUP; |
| 727 | #endif |
| 728 | |
| 729 | ret = create_process (program, args, flags, &pi); |
| 730 | err = GetLastError (); |
| 731 | if (!ret && err == ERROR_FILE_NOT_FOUND) |
| 732 | { |
| 733 | char *exename = (char *) alloca (strlen (program) + 5); |
| 734 | strcat (strcpy (exename, program), ".exe"); |
| 735 | ret = create_process (exename, args, flags, &pi); |
| 736 | err = GetLastError (); |
| 737 | } |
| 738 | |
| 739 | #ifndef USE_WIN32API |
| 740 | if (orig_path) |
| 741 | setenv ("PATH", orig_path, 1); |
| 742 | #endif |
| 743 | |
| 744 | if (!ret) |
| 745 | { |
| 746 | error ("Error creating process \"%s %s\", (error %d): %s\n", |
| 747 | program, args, (int) err, strwinerror (err)); |
| 748 | } |
| 749 | else |
| 750 | { |
| 751 | OUTMSG2 (("Process created: %s %s\n", program, (char *) args)); |
| 752 | } |
| 753 | |
| 754 | #ifndef _WIN32_WCE |
| 755 | /* On Windows CE this handle can't be closed. The OS reuses |
| 756 | it in the debug events, while the 9x/NT versions of Windows |
| 757 | probably use a DuplicateHandle'd one. */ |
| 758 | CloseHandle (pi.hThread); |
| 759 | #endif |
| 760 | |
| 761 | do_initial_child_stuff (pi.hProcess, pi.dwProcessId, 0); |
| 762 | |
| 763 | /* Wait till we are at 1st instruction in program, return new pid |
| 764 | (assuming success). */ |
| 765 | cs.last_ptid = wait (ptid_t (current_process_id), &cs.last_status, 0); |
| 766 | |
| 767 | /* Necessary for handle_v_kill. */ |
| 768 | signal_pid = current_process_id; |
| 769 | |
| 770 | return current_process_id; |
| 771 | } |
| 772 | |
| 773 | /* Attach to a running process. |
| 774 | PID is the process ID to attach to, specified by the user |
| 775 | or a higher layer. */ |
| 776 | int |
| 777 | win32_process_target::attach (unsigned long pid) |
| 778 | { |
| 779 | HANDLE h; |
| 780 | winapi_DebugSetProcessKillOnExit DebugSetProcessKillOnExit = NULL; |
| 781 | DWORD err; |
| 782 | #ifdef _WIN32_WCE |
| 783 | HMODULE dll = GetModuleHandle (_T("COREDLL.DLL")); |
| 784 | #else |
| 785 | HMODULE dll = GetModuleHandle (_T("KERNEL32.DLL")); |
| 786 | #endif |
| 787 | DebugSetProcessKillOnExit = GETPROCADDRESS (dll, DebugSetProcessKillOnExit); |
| 788 | |
| 789 | h = OpenProcess (PROCESS_ALL_ACCESS, FALSE, pid); |
| 790 | if (h != NULL) |
| 791 | { |
| 792 | if (DebugActiveProcess (pid)) |
| 793 | { |
| 794 | if (DebugSetProcessKillOnExit != NULL) |
| 795 | DebugSetProcessKillOnExit (FALSE); |
| 796 | |
| 797 | /* win32_wait needs to know we're attaching. */ |
| 798 | attaching = 1; |
| 799 | do_initial_child_stuff (h, pid, 1); |
| 800 | return 0; |
| 801 | } |
| 802 | |
| 803 | CloseHandle (h); |
| 804 | } |
| 805 | |
| 806 | err = GetLastError (); |
| 807 | error ("Attach to process failed (error %d): %s\n", |
| 808 | (int) err, strwinerror (err)); |
| 809 | } |
| 810 | |
| 811 | /* See nat/windows-nat.h. */ |
| 812 | |
| 813 | int |
| 814 | windows_nat::handle_output_debug_string (struct target_waitstatus *ourstatus) |
| 815 | { |
| 816 | #define READ_BUFFER_LEN 1024 |
| 817 | CORE_ADDR addr; |
| 818 | char s[READ_BUFFER_LEN + 1] = { 0 }; |
| 819 | DWORD nbytes = current_event.u.DebugString.nDebugStringLength; |
| 820 | |
| 821 | if (nbytes == 0) |
| 822 | return 0; |
| 823 | |
| 824 | if (nbytes > READ_BUFFER_LEN) |
| 825 | nbytes = READ_BUFFER_LEN; |
| 826 | |
| 827 | addr = (CORE_ADDR) (size_t) current_event.u.DebugString.lpDebugStringData; |
| 828 | |
| 829 | if (current_event.u.DebugString.fUnicode) |
| 830 | { |
| 831 | /* The event tells us how many bytes, not chars, even |
| 832 | in Unicode. */ |
| 833 | WCHAR buffer[(READ_BUFFER_LEN + 1) / sizeof (WCHAR)] = { 0 }; |
| 834 | if (read_inferior_memory (addr, (unsigned char *) buffer, nbytes) != 0) |
| 835 | return 0; |
| 836 | wcstombs (s, buffer, (nbytes + 1) / sizeof (WCHAR)); |
| 837 | } |
| 838 | else |
| 839 | { |
| 840 | if (read_inferior_memory (addr, (unsigned char *) s, nbytes) != 0) |
| 841 | return 0; |
| 842 | } |
| 843 | |
| 844 | if (!startswith (s, "cYg")) |
| 845 | { |
| 846 | if (!server_waiting) |
| 847 | { |
| 848 | OUTMSG2(("%s", s)); |
| 849 | return 0; |
| 850 | } |
| 851 | |
| 852 | monitor_output (s); |
| 853 | } |
| 854 | #undef READ_BUFFER_LEN |
| 855 | |
| 856 | return 0; |
| 857 | } |
| 858 | |
| 859 | static void |
| 860 | win32_clear_inferiors (void) |
| 861 | { |
| 862 | if (current_process_handle != NULL) |
| 863 | CloseHandle (current_process_handle); |
| 864 | |
| 865 | for_each_thread (delete_thread_info); |
| 866 | siginfo_er.ExceptionCode = 0; |
| 867 | clear_inferiors (); |
| 868 | } |
| 869 | |
| 870 | /* Implementation of target_ops::kill. */ |
| 871 | |
| 872 | int |
| 873 | win32_process_target::kill (process_info *process) |
| 874 | { |
| 875 | TerminateProcess (current_process_handle, 0); |
| 876 | for (;;) |
| 877 | { |
| 878 | if (!child_continue (DBG_CONTINUE, -1)) |
| 879 | break; |
| 880 | if (!wait_for_debug_event (¤t_event, INFINITE)) |
| 881 | break; |
| 882 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) |
| 883 | break; |
| 884 | else if (current_event.dwDebugEventCode == OUTPUT_DEBUG_STRING_EVENT) |
| 885 | handle_output_debug_string (nullptr); |
| 886 | } |
| 887 | |
| 888 | win32_clear_inferiors (); |
| 889 | |
| 890 | remove_process (process); |
| 891 | return 0; |
| 892 | } |
| 893 | |
| 894 | /* Implementation of target_ops::detach. */ |
| 895 | |
| 896 | int |
| 897 | win32_process_target::detach (process_info *process) |
| 898 | { |
| 899 | winapi_DebugActiveProcessStop DebugActiveProcessStop = NULL; |
| 900 | winapi_DebugSetProcessKillOnExit DebugSetProcessKillOnExit = NULL; |
| 901 | #ifdef _WIN32_WCE |
| 902 | HMODULE dll = GetModuleHandle (_T("COREDLL.DLL")); |
| 903 | #else |
| 904 | HMODULE dll = GetModuleHandle (_T("KERNEL32.DLL")); |
| 905 | #endif |
| 906 | DebugActiveProcessStop = GETPROCADDRESS (dll, DebugActiveProcessStop); |
| 907 | DebugSetProcessKillOnExit = GETPROCADDRESS (dll, DebugSetProcessKillOnExit); |
| 908 | |
| 909 | if (DebugSetProcessKillOnExit == NULL |
| 910 | || DebugActiveProcessStop == NULL) |
| 911 | return -1; |
| 912 | |
| 913 | { |
| 914 | struct thread_resume resume; |
| 915 | resume.thread = minus_one_ptid; |
| 916 | resume.kind = resume_continue; |
| 917 | resume.sig = 0; |
| 918 | this->resume (&resume, 1); |
| 919 | } |
| 920 | |
| 921 | if (!DebugActiveProcessStop (current_process_id)) |
| 922 | return -1; |
| 923 | |
| 924 | DebugSetProcessKillOnExit (FALSE); |
| 925 | remove_process (process); |
| 926 | |
| 927 | win32_clear_inferiors (); |
| 928 | return 0; |
| 929 | } |
| 930 | |
| 931 | void |
| 932 | win32_process_target::mourn (struct process_info *process) |
| 933 | { |
| 934 | remove_process (process); |
| 935 | } |
| 936 | |
| 937 | /* Implementation of target_ops::join. */ |
| 938 | |
| 939 | void |
| 940 | win32_process_target::join (int pid) |
| 941 | { |
| 942 | HANDLE h = OpenProcess (PROCESS_ALL_ACCESS, FALSE, pid); |
| 943 | if (h != NULL) |
| 944 | { |
| 945 | WaitForSingleObject (h, INFINITE); |
| 946 | CloseHandle (h); |
| 947 | } |
| 948 | } |
| 949 | |
| 950 | /* Return true iff the thread with thread ID TID is alive. */ |
| 951 | bool |
| 952 | win32_process_target::thread_alive (ptid_t ptid) |
| 953 | { |
| 954 | /* Our thread list is reliable; don't bother to poll target |
| 955 | threads. */ |
| 956 | return find_thread_ptid (ptid) != NULL; |
| 957 | } |
| 958 | |
| 959 | /* Resume the inferior process. RESUME_INFO describes how we want |
| 960 | to resume. */ |
| 961 | void |
| 962 | win32_process_target::resume (thread_resume *resume_info, size_t n) |
| 963 | { |
| 964 | DWORD tid; |
| 965 | enum gdb_signal sig; |
| 966 | int step; |
| 967 | windows_thread_info *th; |
| 968 | DWORD continue_status = DBG_CONTINUE; |
| 969 | ptid_t ptid; |
| 970 | |
| 971 | /* This handles the very limited set of resume packets that GDB can |
| 972 | currently produce. */ |
| 973 | |
| 974 | if (n == 1 && resume_info[0].thread == minus_one_ptid) |
| 975 | tid = -1; |
| 976 | else if (n > 1) |
| 977 | tid = -1; |
| 978 | else |
| 979 | /* Yes, we're ignoring resume_info[0].thread. It'd be tricky to make |
| 980 | the Windows resume code do the right thing for thread switching. */ |
| 981 | tid = current_event.dwThreadId; |
| 982 | |
| 983 | if (resume_info[0].thread != minus_one_ptid) |
| 984 | { |
| 985 | sig = gdb_signal_from_host (resume_info[0].sig); |
| 986 | step = resume_info[0].kind == resume_step; |
| 987 | } |
| 988 | else |
| 989 | { |
| 990 | sig = GDB_SIGNAL_0; |
| 991 | step = 0; |
| 992 | } |
| 993 | |
| 994 | if (sig != GDB_SIGNAL_0) |
| 995 | { |
| 996 | if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) |
| 997 | { |
| 998 | OUTMSG (("Cannot continue with signal %s here.\n", |
| 999 | gdb_signal_to_string (sig))); |
| 1000 | } |
| 1001 | else if (sig == last_sig) |
| 1002 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1003 | else |
| 1004 | OUTMSG (("Can only continue with received signal %s.\n", |
| 1005 | gdb_signal_to_string (last_sig))); |
| 1006 | } |
| 1007 | |
| 1008 | last_sig = GDB_SIGNAL_0; |
| 1009 | |
| 1010 | /* Get context for the currently selected thread. */ |
| 1011 | ptid = debug_event_ptid (¤t_event); |
| 1012 | th = thread_rec (ptid, DONT_INVALIDATE_CONTEXT); |
| 1013 | if (th) |
| 1014 | { |
| 1015 | win32_prepare_to_resume (th); |
| 1016 | |
| 1017 | DWORD *context_flags; |
| 1018 | #ifdef __x86_64__ |
| 1019 | if (wow64_process) |
| 1020 | context_flags = &th->wow64_context.ContextFlags; |
| 1021 | else |
| 1022 | #endif |
| 1023 | context_flags = &th->context.ContextFlags; |
| 1024 | if (*context_flags) |
| 1025 | { |
| 1026 | /* Move register values from the inferior into the thread |
| 1027 | context structure. */ |
| 1028 | regcache_invalidate (); |
| 1029 | |
| 1030 | if (step) |
| 1031 | { |
| 1032 | if (the_low_target.single_step != NULL) |
| 1033 | (*the_low_target.single_step) (th); |
| 1034 | else |
| 1035 | error ("Single stepping is not supported " |
| 1036 | "in this configuration.\n"); |
| 1037 | } |
| 1038 | |
| 1039 | win32_set_thread_context (th); |
| 1040 | *context_flags = 0; |
| 1041 | } |
| 1042 | } |
| 1043 | |
| 1044 | /* Allow continuing with the same signal that interrupted us. |
| 1045 | Otherwise complain. */ |
| 1046 | |
| 1047 | child_continue (continue_status, tid); |
| 1048 | } |
| 1049 | |
| 1050 | static void |
| 1051 | win32_add_one_solib (const char *name, CORE_ADDR load_addr) |
| 1052 | { |
| 1053 | char buf[MAX_PATH + 1]; |
| 1054 | char buf2[MAX_PATH + 1]; |
| 1055 | |
| 1056 | #ifdef _WIN32_WCE |
| 1057 | WIN32_FIND_DATA w32_fd; |
| 1058 | WCHAR wname[MAX_PATH + 1]; |
| 1059 | mbstowcs (wname, name, MAX_PATH); |
| 1060 | HANDLE h = FindFirstFile (wname, &w32_fd); |
| 1061 | #else |
| 1062 | WIN32_FIND_DATAA w32_fd; |
| 1063 | HANDLE h = FindFirstFileA (name, &w32_fd); |
| 1064 | #endif |
| 1065 | |
| 1066 | /* The symbols in a dll are offset by 0x1000, which is the |
| 1067 | offset from 0 of the first byte in an image - because |
| 1068 | of the file header and the section alignment. */ |
| 1069 | load_addr += 0x1000; |
| 1070 | |
| 1071 | if (h == INVALID_HANDLE_VALUE) |
| 1072 | strcpy (buf, name); |
| 1073 | else |
| 1074 | { |
| 1075 | FindClose (h); |
| 1076 | strcpy (buf, name); |
| 1077 | #ifndef _WIN32_WCE |
| 1078 | { |
| 1079 | char cwd[MAX_PATH + 1]; |
| 1080 | char *p; |
| 1081 | if (GetCurrentDirectoryA (MAX_PATH + 1, cwd)) |
| 1082 | { |
| 1083 | p = strrchr (buf, '\\'); |
| 1084 | if (p) |
| 1085 | p[1] = '\0'; |
| 1086 | SetCurrentDirectoryA (buf); |
| 1087 | GetFullPathNameA (w32_fd.cFileName, MAX_PATH, buf, &p); |
| 1088 | SetCurrentDirectoryA (cwd); |
| 1089 | } |
| 1090 | } |
| 1091 | #endif |
| 1092 | } |
| 1093 | |
| 1094 | #ifndef _WIN32_WCE |
| 1095 | if (strcasecmp (buf, "ntdll.dll") == 0) |
| 1096 | { |
| 1097 | GetSystemDirectoryA (buf, sizeof (buf)); |
| 1098 | strcat (buf, "\\ntdll.dll"); |
| 1099 | } |
| 1100 | #endif |
| 1101 | |
| 1102 | #ifdef __CYGWIN__ |
| 1103 | cygwin_conv_path (CCP_WIN_A_TO_POSIX, buf, buf2, sizeof (buf2)); |
| 1104 | #else |
| 1105 | strcpy (buf2, buf); |
| 1106 | #endif |
| 1107 | |
| 1108 | loaded_dll (buf2, load_addr); |
| 1109 | } |
| 1110 | |
| 1111 | typedef BOOL (WINAPI *winapi_EnumProcessModules) (HANDLE, HMODULE *, |
| 1112 | DWORD, LPDWORD); |
| 1113 | #ifdef __x86_64__ |
| 1114 | typedef BOOL (WINAPI *winapi_EnumProcessModulesEx) (HANDLE, HMODULE *, DWORD, |
| 1115 | LPDWORD, DWORD); |
| 1116 | #endif |
| 1117 | typedef BOOL (WINAPI *winapi_GetModuleInformation) (HANDLE, HMODULE, |
| 1118 | LPMODULEINFO, DWORD); |
| 1119 | typedef DWORD (WINAPI *winapi_GetModuleFileNameExA) (HANDLE, HMODULE, |
| 1120 | LPSTR, DWORD); |
| 1121 | |
| 1122 | static winapi_EnumProcessModules win32_EnumProcessModules; |
| 1123 | #ifdef __x86_64__ |
| 1124 | static winapi_EnumProcessModulesEx win32_EnumProcessModulesEx; |
| 1125 | #endif |
| 1126 | static winapi_GetModuleInformation win32_GetModuleInformation; |
| 1127 | static winapi_GetModuleFileNameExA win32_GetModuleFileNameExA; |
| 1128 | |
| 1129 | static BOOL |
| 1130 | load_psapi (void) |
| 1131 | { |
| 1132 | static int psapi_loaded = 0; |
| 1133 | static HMODULE dll = NULL; |
| 1134 | |
| 1135 | if (!psapi_loaded) |
| 1136 | { |
| 1137 | psapi_loaded = 1; |
| 1138 | dll = LoadLibrary (TEXT("psapi.dll")); |
| 1139 | if (!dll) |
| 1140 | return FALSE; |
| 1141 | win32_EnumProcessModules = |
| 1142 | GETPROCADDRESS (dll, EnumProcessModules); |
| 1143 | #ifdef __x86_64__ |
| 1144 | win32_EnumProcessModulesEx = |
| 1145 | GETPROCADDRESS (dll, EnumProcessModulesEx); |
| 1146 | #endif |
| 1147 | win32_GetModuleInformation = |
| 1148 | GETPROCADDRESS (dll, GetModuleInformation); |
| 1149 | win32_GetModuleFileNameExA = |
| 1150 | GETPROCADDRESS (dll, GetModuleFileNameExA); |
| 1151 | } |
| 1152 | |
| 1153 | #ifdef __x86_64__ |
| 1154 | if (wow64_process && win32_EnumProcessModulesEx == nullptr) |
| 1155 | return FALSE; |
| 1156 | #endif |
| 1157 | |
| 1158 | return (win32_EnumProcessModules != NULL |
| 1159 | && win32_GetModuleInformation != NULL |
| 1160 | && win32_GetModuleFileNameExA != NULL); |
| 1161 | } |
| 1162 | |
| 1163 | #ifndef _WIN32_WCE |
| 1164 | |
| 1165 | /* Iterate over all DLLs currently mapped by our inferior, and |
| 1166 | add them to our list of solibs. */ |
| 1167 | |
| 1168 | static void |
| 1169 | win32_add_all_dlls (void) |
| 1170 | { |
| 1171 | size_t i; |
| 1172 | HMODULE dh_buf[1]; |
| 1173 | HMODULE *DllHandle = dh_buf; |
| 1174 | DWORD cbNeeded; |
| 1175 | BOOL ok; |
| 1176 | |
| 1177 | if (!load_psapi ()) |
| 1178 | return; |
| 1179 | |
| 1180 | cbNeeded = 0; |
| 1181 | #ifdef __x86_64__ |
| 1182 | if (wow64_process) |
| 1183 | ok = (*win32_EnumProcessModulesEx) (current_process_handle, |
| 1184 | DllHandle, |
| 1185 | sizeof (HMODULE), |
| 1186 | &cbNeeded, |
| 1187 | LIST_MODULES_32BIT); |
| 1188 | else |
| 1189 | #endif |
| 1190 | ok = (*win32_EnumProcessModules) (current_process_handle, |
| 1191 | DllHandle, |
| 1192 | sizeof (HMODULE), |
| 1193 | &cbNeeded); |
| 1194 | |
| 1195 | if (!ok || !cbNeeded) |
| 1196 | return; |
| 1197 | |
| 1198 | DllHandle = (HMODULE *) alloca (cbNeeded); |
| 1199 | if (!DllHandle) |
| 1200 | return; |
| 1201 | |
| 1202 | #ifdef __x86_64__ |
| 1203 | if (wow64_process) |
| 1204 | ok = (*win32_EnumProcessModulesEx) (current_process_handle, |
| 1205 | DllHandle, |
| 1206 | cbNeeded, |
| 1207 | &cbNeeded, |
| 1208 | LIST_MODULES_32BIT); |
| 1209 | else |
| 1210 | #endif |
| 1211 | ok = (*win32_EnumProcessModules) (current_process_handle, |
| 1212 | DllHandle, |
| 1213 | cbNeeded, |
| 1214 | &cbNeeded); |
| 1215 | if (!ok) |
| 1216 | return; |
| 1217 | |
| 1218 | char system_dir[MAX_PATH]; |
| 1219 | char syswow_dir[MAX_PATH]; |
| 1220 | size_t system_dir_len = 0; |
| 1221 | bool convert_syswow_dir = false; |
| 1222 | #ifdef __x86_64__ |
| 1223 | if (wow64_process) |
| 1224 | #endif |
| 1225 | { |
| 1226 | /* This fails on 32bit Windows because it has no SysWOW64 directory, |
| 1227 | and in this case a path conversion isn't necessary. */ |
| 1228 | UINT len = GetSystemWow64DirectoryA (syswow_dir, sizeof (syswow_dir)); |
| 1229 | if (len > 0) |
| 1230 | { |
| 1231 | /* Check that we have passed a large enough buffer. */ |
| 1232 | gdb_assert (len < sizeof (syswow_dir)); |
| 1233 | |
| 1234 | len = GetSystemDirectoryA (system_dir, sizeof (system_dir)); |
| 1235 | /* Error check. */ |
| 1236 | gdb_assert (len != 0); |
| 1237 | /* Check that we have passed a large enough buffer. */ |
| 1238 | gdb_assert (len < sizeof (system_dir)); |
| 1239 | |
| 1240 | strcat (system_dir, "\\"); |
| 1241 | strcat (syswow_dir, "\\"); |
| 1242 | system_dir_len = strlen (system_dir); |
| 1243 | |
| 1244 | convert_syswow_dir = true; |
| 1245 | } |
| 1246 | |
| 1247 | } |
| 1248 | |
| 1249 | for (i = 1; i < ((size_t) cbNeeded / sizeof (HMODULE)); i++) |
| 1250 | { |
| 1251 | MODULEINFO mi; |
| 1252 | char dll_name[MAX_PATH]; |
| 1253 | |
| 1254 | if (!(*win32_GetModuleInformation) (current_process_handle, |
| 1255 | DllHandle[i], |
| 1256 | &mi, |
| 1257 | sizeof (mi))) |
| 1258 | continue; |
| 1259 | if ((*win32_GetModuleFileNameExA) (current_process_handle, |
| 1260 | DllHandle[i], |
| 1261 | dll_name, |
| 1262 | MAX_PATH) == 0) |
| 1263 | continue; |
| 1264 | |
| 1265 | const char *name = dll_name; |
| 1266 | /* Convert the DLL path of 32bit processes returned by |
| 1267 | GetModuleFileNameEx from the 64bit system directory to the |
| 1268 | 32bit syswow64 directory if necessary. */ |
| 1269 | std::string syswow_dll_path; |
| 1270 | if (convert_syswow_dir |
| 1271 | && strncasecmp (dll_name, system_dir, system_dir_len) == 0 |
| 1272 | && strchr (dll_name + system_dir_len, '\\') == nullptr) |
| 1273 | { |
| 1274 | syswow_dll_path = syswow_dir; |
| 1275 | syswow_dll_path += dll_name + system_dir_len; |
| 1276 | name = syswow_dll_path.c_str(); |
| 1277 | } |
| 1278 | |
| 1279 | win32_add_one_solib (name, (CORE_ADDR) (uintptr_t) mi.lpBaseOfDll); |
| 1280 | } |
| 1281 | } |
| 1282 | #endif |
| 1283 | |
| 1284 | typedef HANDLE (WINAPI *winapi_CreateToolhelp32Snapshot) (DWORD, DWORD); |
| 1285 | typedef BOOL (WINAPI *winapi_Module32First) (HANDLE, LPMODULEENTRY32); |
| 1286 | typedef BOOL (WINAPI *winapi_Module32Next) (HANDLE, LPMODULEENTRY32); |
| 1287 | |
| 1288 | /* See nat/windows-nat.h. */ |
| 1289 | |
| 1290 | void |
| 1291 | windows_nat::handle_load_dll () |
| 1292 | { |
| 1293 | LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; |
| 1294 | const char *dll_name; |
| 1295 | |
| 1296 | dll_name = get_image_name (current_process_handle, |
| 1297 | event->lpImageName, event->fUnicode); |
| 1298 | if (!dll_name) |
| 1299 | return; |
| 1300 | |
| 1301 | win32_add_one_solib (dll_name, (CORE_ADDR) (uintptr_t) event->lpBaseOfDll); |
| 1302 | } |
| 1303 | |
| 1304 | /* See nat/windows-nat.h. */ |
| 1305 | |
| 1306 | void |
| 1307 | windows_nat::handle_unload_dll () |
| 1308 | { |
| 1309 | CORE_ADDR load_addr = |
| 1310 | (CORE_ADDR) (uintptr_t) current_event.u.UnloadDll.lpBaseOfDll; |
| 1311 | |
| 1312 | /* The symbols in a dll are offset by 0x1000, which is the |
| 1313 | offset from 0 of the first byte in an image - because |
| 1314 | of the file header and the section alignment. */ |
| 1315 | load_addr += 0x1000; |
| 1316 | unloaded_dll (NULL, load_addr); |
| 1317 | } |
| 1318 | |
| 1319 | static void |
| 1320 | suspend_one_thread (thread_info *thread) |
| 1321 | { |
| 1322 | windows_thread_info *th = (windows_thread_info *) thread_target_data (thread); |
| 1323 | |
| 1324 | th->suspend (); |
| 1325 | } |
| 1326 | |
| 1327 | static void |
| 1328 | fake_breakpoint_event (void) |
| 1329 | { |
| 1330 | OUTMSG2(("fake_breakpoint_event\n")); |
| 1331 | |
| 1332 | faked_breakpoint = 1; |
| 1333 | |
| 1334 | memset (¤t_event, 0, sizeof (current_event)); |
| 1335 | current_event.dwThreadId = main_thread_id; |
| 1336 | current_event.dwDebugEventCode = EXCEPTION_DEBUG_EVENT; |
| 1337 | current_event.u.Exception.ExceptionRecord.ExceptionCode |
| 1338 | = EXCEPTION_BREAKPOINT; |
| 1339 | |
| 1340 | for_each_thread (suspend_one_thread); |
| 1341 | } |
| 1342 | |
| 1343 | #ifdef _WIN32_WCE |
| 1344 | static int |
| 1345 | auto_delete_breakpoint (CORE_ADDR stop_pc) |
| 1346 | { |
| 1347 | return 1; |
| 1348 | } |
| 1349 | #endif |
| 1350 | |
| 1351 | /* See nat/windows-nat.h. */ |
| 1352 | |
| 1353 | bool |
| 1354 | windows_nat::handle_ms_vc_exception (const EXCEPTION_RECORD *rec) |
| 1355 | { |
| 1356 | return false; |
| 1357 | } |
| 1358 | |
| 1359 | /* See nat/windows-nat.h. */ |
| 1360 | |
| 1361 | bool |
| 1362 | windows_nat::handle_access_violation (const EXCEPTION_RECORD *rec) |
| 1363 | { |
| 1364 | return false; |
| 1365 | } |
| 1366 | |
| 1367 | /* A helper function that will, if needed, set |
| 1368 | 'stopped_at_software_breakpoint' on the thread and adjust the |
| 1369 | PC. */ |
| 1370 | |
| 1371 | static void |
| 1372 | maybe_adjust_pc () |
| 1373 | { |
| 1374 | struct regcache *regcache = get_thread_regcache (current_thread, 1); |
| 1375 | child_fetch_inferior_registers (regcache, -1); |
| 1376 | |
| 1377 | windows_thread_info *th = thread_rec (current_thread_ptid (), |
| 1378 | DONT_INVALIDATE_CONTEXT); |
| 1379 | th->stopped_at_software_breakpoint = false; |
| 1380 | |
| 1381 | if (current_event.dwDebugEventCode == EXCEPTION_DEBUG_EVENT |
| 1382 | && ((current_event.u.Exception.ExceptionRecord.ExceptionCode |
| 1383 | == EXCEPTION_BREAKPOINT) |
| 1384 | || (current_event.u.Exception.ExceptionRecord.ExceptionCode |
| 1385 | == STATUS_WX86_BREAKPOINT)) |
| 1386 | && child_initialization_done) |
| 1387 | { |
| 1388 | th->stopped_at_software_breakpoint = true; |
| 1389 | CORE_ADDR pc = regcache_read_pc (regcache); |
| 1390 | CORE_ADDR sw_breakpoint_pc = pc - the_low_target.decr_pc_after_break; |
| 1391 | regcache_write_pc (regcache, sw_breakpoint_pc); |
| 1392 | } |
| 1393 | } |
| 1394 | |
| 1395 | /* Get the next event from the child. */ |
| 1396 | |
| 1397 | static int |
| 1398 | get_child_debug_event (DWORD *continue_status, |
| 1399 | struct target_waitstatus *ourstatus) |
| 1400 | { |
| 1401 | ptid_t ptid; |
| 1402 | |
| 1403 | last_sig = GDB_SIGNAL_0; |
| 1404 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| 1405 | *continue_status = DBG_CONTINUE; |
| 1406 | |
| 1407 | /* Check if GDB sent us an interrupt request. */ |
| 1408 | check_remote_input_interrupt_request (); |
| 1409 | |
| 1410 | if (soft_interrupt_requested) |
| 1411 | { |
| 1412 | soft_interrupt_requested = 0; |
| 1413 | fake_breakpoint_event (); |
| 1414 | goto gotevent; |
| 1415 | } |
| 1416 | |
| 1417 | #ifndef _WIN32_WCE |
| 1418 | attaching = 0; |
| 1419 | #else |
| 1420 | if (attaching) |
| 1421 | { |
| 1422 | /* WinCE doesn't set an initial breakpoint automatically. To |
| 1423 | stop the inferior, we flush all currently pending debug |
| 1424 | events -- the thread list and the dll list are always |
| 1425 | reported immediatelly without delay, then, we suspend all |
| 1426 | threads and pretend we saw a trap at the current PC of the |
| 1427 | main thread. |
| 1428 | |
| 1429 | Contrary to desktop Windows, Windows CE *does* report the dll |
| 1430 | names on LOAD_DLL_DEBUG_EVENTs resulting from a |
| 1431 | DebugActiveProcess call. This limits the way we can detect |
| 1432 | if all the dlls have already been reported. If we get a real |
| 1433 | debug event before leaving attaching, the worst that will |
| 1434 | happen is the user will see a spurious breakpoint. */ |
| 1435 | |
| 1436 | current_event.dwDebugEventCode = 0; |
| 1437 | if (!wait_for_debug_event (¤t_event, 0)) |
| 1438 | { |
| 1439 | OUTMSG2(("no attach events left\n")); |
| 1440 | fake_breakpoint_event (); |
| 1441 | attaching = 0; |
| 1442 | } |
| 1443 | else |
| 1444 | OUTMSG2(("got attach event\n")); |
| 1445 | } |
| 1446 | else |
| 1447 | #endif |
| 1448 | { |
| 1449 | gdb::optional<pending_stop> stop = fetch_pending_stop (debug_threads); |
| 1450 | if (stop.has_value ()) |
| 1451 | { |
| 1452 | *ourstatus = stop->status; |
| 1453 | current_event = stop->event; |
| 1454 | ptid = debug_event_ptid (¤t_event); |
| 1455 | current_thread = find_thread_ptid (ptid); |
| 1456 | return 1; |
| 1457 | } |
| 1458 | |
| 1459 | /* Keep the wait time low enough for comfortable remote |
| 1460 | interruption, but high enough so gdbserver doesn't become a |
| 1461 | bottleneck. */ |
| 1462 | if (!wait_for_debug_event (¤t_event, 250)) |
| 1463 | { |
| 1464 | DWORD e = GetLastError(); |
| 1465 | |
| 1466 | if (e == ERROR_PIPE_NOT_CONNECTED) |
| 1467 | { |
| 1468 | /* This will happen if the loader fails to succesfully |
| 1469 | load the application, e.g., if the main executable |
| 1470 | tries to pull in a non-existing export from a |
| 1471 | DLL. */ |
| 1472 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 1473 | ourstatus->value.integer = 1; |
| 1474 | return 1; |
| 1475 | } |
| 1476 | |
| 1477 | return 0; |
| 1478 | } |
| 1479 | } |
| 1480 | |
| 1481 | gotevent: |
| 1482 | |
| 1483 | switch (current_event.dwDebugEventCode) |
| 1484 | { |
| 1485 | case CREATE_THREAD_DEBUG_EVENT: |
| 1486 | OUTMSG2 (("gdbserver: kernel event CREATE_THREAD_DEBUG_EVENT " |
| 1487 | "for pid=%u tid=%x)\n", |
| 1488 | (unsigned) current_event.dwProcessId, |
| 1489 | (unsigned) current_event.dwThreadId)); |
| 1490 | |
| 1491 | /* Record the existence of this thread. */ |
| 1492 | child_add_thread (current_event.dwProcessId, |
| 1493 | current_event.dwThreadId, |
| 1494 | current_event.u.CreateThread.hThread, |
| 1495 | current_event.u.CreateThread.lpThreadLocalBase); |
| 1496 | break; |
| 1497 | |
| 1498 | case EXIT_THREAD_DEBUG_EVENT: |
| 1499 | OUTMSG2 (("gdbserver: kernel event EXIT_THREAD_DEBUG_EVENT " |
| 1500 | "for pid=%u tid=%x\n", |
| 1501 | (unsigned) current_event.dwProcessId, |
| 1502 | (unsigned) current_event.dwThreadId)); |
| 1503 | child_delete_thread (current_event.dwProcessId, |
| 1504 | current_event.dwThreadId); |
| 1505 | |
| 1506 | current_thread = get_first_thread (); |
| 1507 | return 1; |
| 1508 | |
| 1509 | case CREATE_PROCESS_DEBUG_EVENT: |
| 1510 | OUTMSG2 (("gdbserver: kernel event CREATE_PROCESS_DEBUG_EVENT " |
| 1511 | "for pid=%u tid=%x\n", |
| 1512 | (unsigned) current_event.dwProcessId, |
| 1513 | (unsigned) current_event.dwThreadId)); |
| 1514 | CloseHandle (current_event.u.CreateProcessInfo.hFile); |
| 1515 | |
| 1516 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; |
| 1517 | main_thread_id = current_event.dwThreadId; |
| 1518 | |
| 1519 | /* Add the main thread. */ |
| 1520 | child_add_thread (current_event.dwProcessId, |
| 1521 | main_thread_id, |
| 1522 | current_event.u.CreateProcessInfo.hThread, |
| 1523 | current_event.u.CreateProcessInfo.lpThreadLocalBase); |
| 1524 | |
| 1525 | #ifdef _WIN32_WCE |
| 1526 | if (!attaching) |
| 1527 | { |
| 1528 | /* Windows CE doesn't set the initial breakpoint |
| 1529 | automatically like the desktop versions of Windows do. |
| 1530 | We add it explicitly here. It will be removed as soon as |
| 1531 | it is hit. */ |
| 1532 | set_breakpoint_at ((CORE_ADDR) (long) current_event.u |
| 1533 | .CreateProcessInfo.lpStartAddress, |
| 1534 | auto_delete_breakpoint); |
| 1535 | } |
| 1536 | #endif |
| 1537 | break; |
| 1538 | |
| 1539 | case EXIT_PROCESS_DEBUG_EVENT: |
| 1540 | OUTMSG2 (("gdbserver: kernel event EXIT_PROCESS_DEBUG_EVENT " |
| 1541 | "for pid=%u tid=%x\n", |
| 1542 | (unsigned) current_event.dwProcessId, |
| 1543 | (unsigned) current_event.dwThreadId)); |
| 1544 | { |
| 1545 | DWORD exit_status = current_event.u.ExitProcess.dwExitCode; |
| 1546 | /* If the exit status looks like a fatal exception, but we |
| 1547 | don't recognize the exception's code, make the original |
| 1548 | exit status value available, to avoid losing information. */ |
| 1549 | int exit_signal |
| 1550 | = WIFSIGNALED (exit_status) ? WTERMSIG (exit_status) : -1; |
| 1551 | if (exit_signal == -1) |
| 1552 | { |
| 1553 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 1554 | ourstatus->value.integer = exit_status; |
| 1555 | } |
| 1556 | else |
| 1557 | { |
| 1558 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
| 1559 | ourstatus->value.sig = gdb_signal_from_host (exit_signal); |
| 1560 | } |
| 1561 | } |
| 1562 | child_continue (DBG_CONTINUE, desired_stop_thread_id); |
| 1563 | CloseHandle (current_process_handle); |
| 1564 | current_process_handle = NULL; |
| 1565 | break; |
| 1566 | |
| 1567 | case LOAD_DLL_DEBUG_EVENT: |
| 1568 | OUTMSG2 (("gdbserver: kernel event LOAD_DLL_DEBUG_EVENT " |
| 1569 | "for pid=%u tid=%x\n", |
| 1570 | (unsigned) current_event.dwProcessId, |
| 1571 | (unsigned) current_event.dwThreadId)); |
| 1572 | CloseHandle (current_event.u.LoadDll.hFile); |
| 1573 | if (! child_initialization_done) |
| 1574 | break; |
| 1575 | handle_load_dll (); |
| 1576 | |
| 1577 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1578 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1579 | break; |
| 1580 | |
| 1581 | case UNLOAD_DLL_DEBUG_EVENT: |
| 1582 | OUTMSG2 (("gdbserver: kernel event UNLOAD_DLL_DEBUG_EVENT " |
| 1583 | "for pid=%u tid=%x\n", |
| 1584 | (unsigned) current_event.dwProcessId, |
| 1585 | (unsigned) current_event.dwThreadId)); |
| 1586 | if (! child_initialization_done) |
| 1587 | break; |
| 1588 | handle_unload_dll (); |
| 1589 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1590 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1591 | break; |
| 1592 | |
| 1593 | case EXCEPTION_DEBUG_EVENT: |
| 1594 | OUTMSG2 (("gdbserver: kernel event EXCEPTION_DEBUG_EVENT " |
| 1595 | "for pid=%u tid=%x\n", |
| 1596 | (unsigned) current_event.dwProcessId, |
| 1597 | (unsigned) current_event.dwThreadId)); |
| 1598 | if (handle_exception (ourstatus, debug_threads) |
| 1599 | == HANDLE_EXCEPTION_UNHANDLED) |
| 1600 | *continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1601 | break; |
| 1602 | |
| 1603 | case OUTPUT_DEBUG_STRING_EVENT: |
| 1604 | /* A message from the kernel (or Cygwin). */ |
| 1605 | OUTMSG2 (("gdbserver: kernel event OUTPUT_DEBUG_STRING_EVENT " |
| 1606 | "for pid=%u tid=%x\n", |
| 1607 | (unsigned) current_event.dwProcessId, |
| 1608 | (unsigned) current_event.dwThreadId)); |
| 1609 | handle_output_debug_string (nullptr); |
| 1610 | break; |
| 1611 | |
| 1612 | default: |
| 1613 | OUTMSG2 (("gdbserver: kernel event unknown " |
| 1614 | "for pid=%u tid=%x code=%x\n", |
| 1615 | (unsigned) current_event.dwProcessId, |
| 1616 | (unsigned) current_event.dwThreadId, |
| 1617 | (unsigned) current_event.dwDebugEventCode)); |
| 1618 | break; |
| 1619 | } |
| 1620 | |
| 1621 | ptid = debug_event_ptid (¤t_event); |
| 1622 | |
| 1623 | if (desired_stop_thread_id != -1 && desired_stop_thread_id != ptid.lwp ()) |
| 1624 | { |
| 1625 | /* Pending stop. See the comment by the definition of |
| 1626 | "pending_stops" for details on why this is needed. */ |
| 1627 | OUTMSG2 (("get_windows_debug_event - " |
| 1628 | "unexpected stop in 0x%lx (expecting 0x%x)\n", |
| 1629 | ptid.lwp (), desired_stop_thread_id)); |
| 1630 | maybe_adjust_pc (); |
| 1631 | pending_stops.push_back ({(DWORD) ptid.lwp (), *ourstatus, current_event}); |
| 1632 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| 1633 | } |
| 1634 | else |
| 1635 | current_thread = find_thread_ptid (ptid); |
| 1636 | |
| 1637 | return 1; |
| 1638 | } |
| 1639 | |
| 1640 | /* Wait for the inferior process to change state. |
| 1641 | STATUS will be filled in with a response code to send to GDB. |
| 1642 | Returns the signal which caused the process to stop. */ |
| 1643 | ptid_t |
| 1644 | win32_process_target::wait (ptid_t ptid, target_waitstatus *ourstatus, |
| 1645 | int options) |
| 1646 | { |
| 1647 | if (cached_status.kind != TARGET_WAITKIND_IGNORE) |
| 1648 | { |
| 1649 | /* The core always does a wait after creating the inferior, and |
| 1650 | do_initial_child_stuff already ran the inferior to the |
| 1651 | initial breakpoint (or an exit, if creating the process |
| 1652 | fails). Report it now. */ |
| 1653 | *ourstatus = cached_status; |
| 1654 | cached_status.kind = TARGET_WAITKIND_IGNORE; |
| 1655 | return debug_event_ptid (¤t_event); |
| 1656 | } |
| 1657 | |
| 1658 | while (1) |
| 1659 | { |
| 1660 | DWORD continue_status; |
| 1661 | if (!get_child_debug_event (&continue_status, ourstatus)) |
| 1662 | continue; |
| 1663 | |
| 1664 | switch (ourstatus->kind) |
| 1665 | { |
| 1666 | case TARGET_WAITKIND_EXITED: |
| 1667 | OUTMSG2 (("Child exited with retcode = %x\n", |
| 1668 | ourstatus->value.integer)); |
| 1669 | win32_clear_inferiors (); |
| 1670 | return ptid_t (current_event.dwProcessId); |
| 1671 | case TARGET_WAITKIND_STOPPED: |
| 1672 | case TARGET_WAITKIND_SIGNALLED: |
| 1673 | case TARGET_WAITKIND_LOADED: |
| 1674 | { |
| 1675 | OUTMSG2 (("Child Stopped with signal = %d \n", |
| 1676 | ourstatus->value.sig)); |
| 1677 | maybe_adjust_pc (); |
| 1678 | return debug_event_ptid (¤t_event); |
| 1679 | } |
| 1680 | default: |
| 1681 | OUTMSG (("Ignoring unknown internal event, %d\n", ourstatus->kind)); |
| 1682 | /* fall-through */ |
| 1683 | case TARGET_WAITKIND_SPURIOUS: |
| 1684 | /* do nothing, just continue */ |
| 1685 | child_continue (continue_status, desired_stop_thread_id); |
| 1686 | break; |
| 1687 | } |
| 1688 | } |
| 1689 | } |
| 1690 | |
| 1691 | /* Fetch registers from the inferior process. |
| 1692 | If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO. */ |
| 1693 | void |
| 1694 | win32_process_target::fetch_registers (regcache *regcache, int regno) |
| 1695 | { |
| 1696 | child_fetch_inferior_registers (regcache, regno); |
| 1697 | } |
| 1698 | |
| 1699 | /* Store registers to the inferior process. |
| 1700 | If REGNO is -1, store all registers; otherwise, store at least REGNO. */ |
| 1701 | void |
| 1702 | win32_process_target::store_registers (regcache *regcache, int regno) |
| 1703 | { |
| 1704 | child_store_inferior_registers (regcache, regno); |
| 1705 | } |
| 1706 | |
| 1707 | /* Read memory from the inferior process. This should generally be |
| 1708 | called through read_inferior_memory, which handles breakpoint shadowing. |
| 1709 | Read LEN bytes at MEMADDR into a buffer at MYADDR. */ |
| 1710 | int |
| 1711 | win32_process_target::read_memory (CORE_ADDR memaddr, unsigned char *myaddr, |
| 1712 | int len) |
| 1713 | { |
| 1714 | return child_xfer_memory (memaddr, (char *) myaddr, len, 0, 0) != len; |
| 1715 | } |
| 1716 | |
| 1717 | /* Write memory to the inferior process. This should generally be |
| 1718 | called through write_inferior_memory, which handles breakpoint shadowing. |
| 1719 | Write LEN bytes from the buffer at MYADDR to MEMADDR. |
| 1720 | Returns 0 on success and errno on failure. */ |
| 1721 | int |
| 1722 | win32_process_target::write_memory (CORE_ADDR memaddr, |
| 1723 | const unsigned char *myaddr, int len) |
| 1724 | { |
| 1725 | return child_xfer_memory (memaddr, (char *) myaddr, len, 1, 0) != len; |
| 1726 | } |
| 1727 | |
| 1728 | /* Send an interrupt request to the inferior process. */ |
| 1729 | void |
| 1730 | win32_process_target::request_interrupt () |
| 1731 | { |
| 1732 | winapi_DebugBreakProcess DebugBreakProcess; |
| 1733 | winapi_GenerateConsoleCtrlEvent GenerateConsoleCtrlEvent; |
| 1734 | |
| 1735 | #ifdef _WIN32_WCE |
| 1736 | HMODULE dll = GetModuleHandle (_T("COREDLL.DLL")); |
| 1737 | #else |
| 1738 | HMODULE dll = GetModuleHandle (_T("KERNEL32.DLL")); |
| 1739 | #endif |
| 1740 | |
| 1741 | GenerateConsoleCtrlEvent = GETPROCADDRESS (dll, GenerateConsoleCtrlEvent); |
| 1742 | |
| 1743 | if (GenerateConsoleCtrlEvent != NULL |
| 1744 | && GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, current_process_id)) |
| 1745 | return; |
| 1746 | |
| 1747 | /* GenerateConsoleCtrlEvent can fail if process id being debugged is |
| 1748 | not a process group id. |
| 1749 | Fallback to XP/Vista 'DebugBreakProcess', which generates a |
| 1750 | breakpoint exception in the interior process. */ |
| 1751 | |
| 1752 | DebugBreakProcess = GETPROCADDRESS (dll, DebugBreakProcess); |
| 1753 | |
| 1754 | if (DebugBreakProcess != NULL |
| 1755 | && DebugBreakProcess (current_process_handle)) |
| 1756 | return; |
| 1757 | |
| 1758 | /* Last resort, suspend all threads manually. */ |
| 1759 | soft_interrupt_requested = 1; |
| 1760 | } |
| 1761 | |
| 1762 | bool |
| 1763 | win32_process_target::supports_hardware_single_step () |
| 1764 | { |
| 1765 | return true; |
| 1766 | } |
| 1767 | |
| 1768 | #ifdef _WIN32_WCE |
| 1769 | int |
| 1770 | win32_error_to_fileio_error (DWORD err) |
| 1771 | { |
| 1772 | switch (err) |
| 1773 | { |
| 1774 | case ERROR_BAD_PATHNAME: |
| 1775 | case ERROR_FILE_NOT_FOUND: |
| 1776 | case ERROR_INVALID_NAME: |
| 1777 | case ERROR_PATH_NOT_FOUND: |
| 1778 | return FILEIO_ENOENT; |
| 1779 | case ERROR_CRC: |
| 1780 | case ERROR_IO_DEVICE: |
| 1781 | case ERROR_OPEN_FAILED: |
| 1782 | return FILEIO_EIO; |
| 1783 | case ERROR_INVALID_HANDLE: |
| 1784 | return FILEIO_EBADF; |
| 1785 | case ERROR_ACCESS_DENIED: |
| 1786 | case ERROR_SHARING_VIOLATION: |
| 1787 | return FILEIO_EACCES; |
| 1788 | case ERROR_NOACCESS: |
| 1789 | return FILEIO_EFAULT; |
| 1790 | case ERROR_BUSY: |
| 1791 | return FILEIO_EBUSY; |
| 1792 | case ERROR_ALREADY_EXISTS: |
| 1793 | case ERROR_FILE_EXISTS: |
| 1794 | return FILEIO_EEXIST; |
| 1795 | case ERROR_BAD_DEVICE: |
| 1796 | return FILEIO_ENODEV; |
| 1797 | case ERROR_DIRECTORY: |
| 1798 | return FILEIO_ENOTDIR; |
| 1799 | case ERROR_FILENAME_EXCED_RANGE: |
| 1800 | case ERROR_INVALID_DATA: |
| 1801 | case ERROR_INVALID_PARAMETER: |
| 1802 | case ERROR_NEGATIVE_SEEK: |
| 1803 | return FILEIO_EINVAL; |
| 1804 | case ERROR_TOO_MANY_OPEN_FILES: |
| 1805 | return FILEIO_EMFILE; |
| 1806 | case ERROR_HANDLE_DISK_FULL: |
| 1807 | case ERROR_DISK_FULL: |
| 1808 | return FILEIO_ENOSPC; |
| 1809 | case ERROR_WRITE_PROTECT: |
| 1810 | return FILEIO_EROFS; |
| 1811 | case ERROR_NOT_SUPPORTED: |
| 1812 | return FILEIO_ENOSYS; |
| 1813 | } |
| 1814 | |
| 1815 | return FILEIO_EUNKNOWN; |
| 1816 | } |
| 1817 | |
| 1818 | void |
| 1819 | win32_process_target::hostio_last_error (char *buf) |
| 1820 | { |
| 1821 | DWORD winerr = GetLastError (); |
| 1822 | int fileio_err = win32_error_to_fileio_error (winerr); |
| 1823 | sprintf (buf, "F-1,%x", fileio_err); |
| 1824 | } |
| 1825 | #endif |
| 1826 | |
| 1827 | bool |
| 1828 | win32_process_target::supports_qxfer_siginfo () |
| 1829 | { |
| 1830 | return true; |
| 1831 | } |
| 1832 | |
| 1833 | /* Write Windows signal info. */ |
| 1834 | |
| 1835 | int |
| 1836 | win32_process_target::qxfer_siginfo (const char *annex, |
| 1837 | unsigned char *readbuf, |
| 1838 | unsigned const char *writebuf, |
| 1839 | CORE_ADDR offset, int len) |
| 1840 | { |
| 1841 | if (siginfo_er.ExceptionCode == 0) |
| 1842 | return -1; |
| 1843 | |
| 1844 | if (readbuf == nullptr) |
| 1845 | return -1; |
| 1846 | |
| 1847 | char *buf = (char *) &siginfo_er; |
| 1848 | size_t bufsize = sizeof (siginfo_er); |
| 1849 | |
| 1850 | #ifdef __x86_64__ |
| 1851 | EXCEPTION_RECORD32 er32; |
| 1852 | if (wow64_process) |
| 1853 | { |
| 1854 | buf = (char *) &er32; |
| 1855 | bufsize = sizeof (er32); |
| 1856 | |
| 1857 | er32.ExceptionCode = siginfo_er.ExceptionCode; |
| 1858 | er32.ExceptionFlags = siginfo_er.ExceptionFlags; |
| 1859 | er32.ExceptionRecord = (uintptr_t) siginfo_er.ExceptionRecord; |
| 1860 | er32.ExceptionAddress = (uintptr_t) siginfo_er.ExceptionAddress; |
| 1861 | er32.NumberParameters = siginfo_er.NumberParameters; |
| 1862 | int i; |
| 1863 | for (i = 0; i < EXCEPTION_MAXIMUM_PARAMETERS; i++) |
| 1864 | er32.ExceptionInformation[i] = siginfo_er.ExceptionInformation[i]; |
| 1865 | } |
| 1866 | #endif |
| 1867 | |
| 1868 | if (offset > bufsize) |
| 1869 | return -1; |
| 1870 | |
| 1871 | if (offset + len > bufsize) |
| 1872 | len = bufsize - offset; |
| 1873 | |
| 1874 | memcpy (readbuf, buf + offset, len); |
| 1875 | |
| 1876 | return len; |
| 1877 | } |
| 1878 | |
| 1879 | bool |
| 1880 | win32_process_target::supports_get_tib_address () |
| 1881 | { |
| 1882 | return true; |
| 1883 | } |
| 1884 | |
| 1885 | /* Write Windows OS Thread Information Block address. */ |
| 1886 | |
| 1887 | int |
| 1888 | win32_process_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr) |
| 1889 | { |
| 1890 | windows_thread_info *th; |
| 1891 | th = thread_rec (ptid, DONT_INVALIDATE_CONTEXT); |
| 1892 | if (th == NULL) |
| 1893 | return 0; |
| 1894 | if (addr != NULL) |
| 1895 | *addr = th->thread_local_base; |
| 1896 | return 1; |
| 1897 | } |
| 1898 | |
| 1899 | /* Implementation of the target_ops method "sw_breakpoint_from_kind". */ |
| 1900 | |
| 1901 | const gdb_byte * |
| 1902 | win32_process_target::sw_breakpoint_from_kind (int kind, int *size) |
| 1903 | { |
| 1904 | *size = the_low_target.breakpoint_len; |
| 1905 | return the_low_target.breakpoint; |
| 1906 | } |
| 1907 | |
| 1908 | bool |
| 1909 | win32_process_target::stopped_by_sw_breakpoint () |
| 1910 | { |
| 1911 | windows_thread_info *th = thread_rec (current_thread_ptid (), |
| 1912 | DONT_INVALIDATE_CONTEXT); |
| 1913 | return th == nullptr ? false : th->stopped_at_software_breakpoint; |
| 1914 | } |
| 1915 | |
| 1916 | bool |
| 1917 | win32_process_target::supports_stopped_by_sw_breakpoint () |
| 1918 | { |
| 1919 | return true; |
| 1920 | } |
| 1921 | |
| 1922 | CORE_ADDR |
| 1923 | win32_process_target::read_pc (struct regcache *regcache) |
| 1924 | { |
| 1925 | return (*the_low_target.get_pc) (regcache); |
| 1926 | } |
| 1927 | |
| 1928 | void |
| 1929 | win32_process_target::write_pc (struct regcache *regcache, CORE_ADDR pc) |
| 1930 | { |
| 1931 | return (*the_low_target.set_pc) (regcache, pc); |
| 1932 | } |
| 1933 | |
| 1934 | /* The win32 target ops object. */ |
| 1935 | |
| 1936 | static win32_process_target the_win32_target; |
| 1937 | |
| 1938 | /* Initialize the Win32 backend. */ |
| 1939 | void |
| 1940 | initialize_low (void) |
| 1941 | { |
| 1942 | set_target_ops (&the_win32_target); |
| 1943 | the_low_target.arch_setup (); |
| 1944 | |
| 1945 | #ifdef __x86_64__ |
| 1946 | /* These functions are loaded dynamically, because they are not available |
| 1947 | on Windows XP. */ |
| 1948 | HMODULE dll = GetModuleHandle (_T("KERNEL32.DLL")); |
| 1949 | win32_Wow64GetThreadContext = GETPROCADDRESS (dll, Wow64GetThreadContext); |
| 1950 | win32_Wow64SetThreadContext = GETPROCADDRESS (dll, Wow64SetThreadContext); |
| 1951 | #endif |
| 1952 | } |