| 1 | /* Target-vector operations for controlling windows child processes, for GDB. |
| 2 | |
| 3 | Copyright (C) 1995-2017 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Cygnus Solutions, A Red Hat Company. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | /* Originally by Steve Chamberlain, sac@cygnus.com */ |
| 23 | |
| 24 | #include "defs.h" |
| 25 | #include "frame.h" /* required by inferior.h */ |
| 26 | #include "inferior.h" |
| 27 | #include "infrun.h" |
| 28 | #include "target.h" |
| 29 | #include "gdbcore.h" |
| 30 | #include "command.h" |
| 31 | #include "completer.h" |
| 32 | #include "regcache.h" |
| 33 | #include "top.h" |
| 34 | #include <signal.h> |
| 35 | #include <sys/types.h> |
| 36 | #include <fcntl.h> |
| 37 | #include <windows.h> |
| 38 | #include <imagehlp.h> |
| 39 | #include <psapi.h> |
| 40 | #ifdef __CYGWIN__ |
| 41 | #include <wchar.h> |
| 42 | #include <sys/cygwin.h> |
| 43 | #include <cygwin/version.h> |
| 44 | #endif |
| 45 | |
| 46 | #include "buildsym.h" |
| 47 | #include "filenames.h" |
| 48 | #include "symfile.h" |
| 49 | #include "objfiles.h" |
| 50 | #include "gdb_bfd.h" |
| 51 | #include "gdb_obstack.h" |
| 52 | #include "gdbthread.h" |
| 53 | #include "gdbcmd.h" |
| 54 | #include <unistd.h> |
| 55 | #include "exec.h" |
| 56 | #include "solist.h" |
| 57 | #include "solib.h" |
| 58 | #include "xml-support.h" |
| 59 | #include "inttypes.h" |
| 60 | |
| 61 | #include "i386-tdep.h" |
| 62 | #include "i387-tdep.h" |
| 63 | |
| 64 | #include "windows-tdep.h" |
| 65 | #include "windows-nat.h" |
| 66 | #include "x86-nat.h" |
| 67 | #include "complaints.h" |
| 68 | #include "inf-child.h" |
| 69 | |
| 70 | #define AdjustTokenPrivileges dyn_AdjustTokenPrivileges |
| 71 | #define DebugActiveProcessStop dyn_DebugActiveProcessStop |
| 72 | #define DebugBreakProcess dyn_DebugBreakProcess |
| 73 | #define DebugSetProcessKillOnExit dyn_DebugSetProcessKillOnExit |
| 74 | #define EnumProcessModules dyn_EnumProcessModules |
| 75 | #define GetModuleInformation dyn_GetModuleInformation |
| 76 | #define LookupPrivilegeValueA dyn_LookupPrivilegeValueA |
| 77 | #define OpenProcessToken dyn_OpenProcessToken |
| 78 | #define GetConsoleFontSize dyn_GetConsoleFontSize |
| 79 | #define GetCurrentConsoleFont dyn_GetCurrentConsoleFont |
| 80 | |
| 81 | typedef BOOL WINAPI (AdjustTokenPrivileges_ftype) (HANDLE, BOOL, |
| 82 | PTOKEN_PRIVILEGES, |
| 83 | DWORD, PTOKEN_PRIVILEGES, |
| 84 | PDWORD); |
| 85 | static AdjustTokenPrivileges_ftype *AdjustTokenPrivileges; |
| 86 | |
| 87 | typedef BOOL WINAPI (DebugActiveProcessStop_ftype) (DWORD); |
| 88 | static DebugActiveProcessStop_ftype *DebugActiveProcessStop; |
| 89 | |
| 90 | typedef BOOL WINAPI (DebugBreakProcess_ftype) (HANDLE); |
| 91 | static DebugBreakProcess_ftype *DebugBreakProcess; |
| 92 | |
| 93 | typedef BOOL WINAPI (DebugSetProcessKillOnExit_ftype) (BOOL); |
| 94 | static DebugSetProcessKillOnExit_ftype *DebugSetProcessKillOnExit; |
| 95 | |
| 96 | typedef BOOL WINAPI (EnumProcessModules_ftype) (HANDLE, HMODULE *, DWORD, |
| 97 | LPDWORD); |
| 98 | static EnumProcessModules_ftype *EnumProcessModules; |
| 99 | |
| 100 | typedef BOOL WINAPI (GetModuleInformation_ftype) (HANDLE, HMODULE, |
| 101 | LPMODULEINFO, DWORD); |
| 102 | static GetModuleInformation_ftype *GetModuleInformation; |
| 103 | |
| 104 | typedef BOOL WINAPI (LookupPrivilegeValueA_ftype) (LPCSTR, LPCSTR, PLUID); |
| 105 | static LookupPrivilegeValueA_ftype *LookupPrivilegeValueA; |
| 106 | |
| 107 | typedef BOOL WINAPI (OpenProcessToken_ftype) (HANDLE, DWORD, PHANDLE); |
| 108 | static OpenProcessToken_ftype *OpenProcessToken; |
| 109 | |
| 110 | typedef BOOL WINAPI (GetCurrentConsoleFont_ftype) (HANDLE, BOOL, |
| 111 | CONSOLE_FONT_INFO *); |
| 112 | static GetCurrentConsoleFont_ftype *GetCurrentConsoleFont; |
| 113 | |
| 114 | typedef COORD WINAPI (GetConsoleFontSize_ftype) (HANDLE, DWORD); |
| 115 | static GetConsoleFontSize_ftype *GetConsoleFontSize; |
| 116 | |
| 117 | #undef STARTUPINFO |
| 118 | #undef CreateProcess |
| 119 | #undef GetModuleFileNameEx |
| 120 | |
| 121 | #ifndef __CYGWIN__ |
| 122 | # define __PMAX (MAX_PATH + 1) |
| 123 | typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE, LPSTR, DWORD); |
| 124 | static GetModuleFileNameEx_ftype *GetModuleFileNameEx; |
| 125 | # define STARTUPINFO STARTUPINFOA |
| 126 | # define CreateProcess CreateProcessA |
| 127 | # define GetModuleFileNameEx_name "GetModuleFileNameExA" |
| 128 | # define bad_GetModuleFileNameEx bad_GetModuleFileNameExA |
| 129 | #else |
| 130 | # define __PMAX PATH_MAX |
| 131 | /* The starting and ending address of the cygwin1.dll text segment. */ |
| 132 | static CORE_ADDR cygwin_load_start; |
| 133 | static CORE_ADDR cygwin_load_end; |
| 134 | # define __USEWIDE |
| 135 | typedef wchar_t cygwin_buf_t; |
| 136 | typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE, |
| 137 | LPWSTR, DWORD); |
| 138 | static GetModuleFileNameEx_ftype *GetModuleFileNameEx; |
| 139 | # define STARTUPINFO STARTUPINFOW |
| 140 | # define CreateProcess CreateProcessW |
| 141 | # define GetModuleFileNameEx_name "GetModuleFileNameExW" |
| 142 | # define bad_GetModuleFileNameEx bad_GetModuleFileNameExW |
| 143 | #endif |
| 144 | |
| 145 | static int have_saved_context; /* True if we've saved context from a |
| 146 | cygwin signal. */ |
| 147 | static CONTEXT saved_context; /* Containes the saved context from a |
| 148 | cygwin signal. */ |
| 149 | |
| 150 | /* If we're not using the old Cygwin header file set, define the |
| 151 | following which never should have been in the generic Win32 API |
| 152 | headers in the first place since they were our own invention... */ |
| 153 | #ifndef _GNU_H_WINDOWS_H |
| 154 | enum |
| 155 | { |
| 156 | FLAG_TRACE_BIT = 0x100, |
| 157 | }; |
| 158 | #endif |
| 159 | |
| 160 | #ifndef CONTEXT_EXTENDED_REGISTERS |
| 161 | /* This macro is only defined on ia32. It only makes sense on this target, |
| 162 | so define it as zero if not already defined. */ |
| 163 | #define CONTEXT_EXTENDED_REGISTERS 0 |
| 164 | #endif |
| 165 | |
| 166 | #define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \ |
| 167 | | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \ |
| 168 | | CONTEXT_EXTENDED_REGISTERS |
| 169 | |
| 170 | static uintptr_t dr[8]; |
| 171 | static int debug_registers_changed; |
| 172 | static int debug_registers_used; |
| 173 | |
| 174 | static int windows_initialization_done; |
| 175 | #define DR6_CLEAR_VALUE 0xffff0ff0 |
| 176 | |
| 177 | /* The exception thrown by a program to tell the debugger the name of |
| 178 | a thread. The exception record contains an ID of a thread and a |
| 179 | name to give it. This exception has no documented name, but MSDN |
| 180 | dubs it "MS_VC_EXCEPTION" in one code example. */ |
| 181 | #define MS_VC_EXCEPTION 0x406d1388 |
| 182 | |
| 183 | typedef enum |
| 184 | { |
| 185 | HANDLE_EXCEPTION_UNHANDLED = 0, |
| 186 | HANDLE_EXCEPTION_HANDLED, |
| 187 | HANDLE_EXCEPTION_IGNORED |
| 188 | } handle_exception_result; |
| 189 | |
| 190 | /* The string sent by cygwin when it processes a signal. |
| 191 | FIXME: This should be in a cygwin include file. */ |
| 192 | #ifndef _CYGWIN_SIGNAL_STRING |
| 193 | #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f" |
| 194 | #endif |
| 195 | |
| 196 | #define CHECK(x) check (x, __FILE__,__LINE__) |
| 197 | #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x |
| 198 | #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x |
| 199 | #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x |
| 200 | #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x |
| 201 | |
| 202 | static void windows_interrupt (struct target_ops *self, ptid_t); |
| 203 | static int windows_thread_alive (struct target_ops *, ptid_t); |
| 204 | static void windows_kill_inferior (struct target_ops *); |
| 205 | |
| 206 | static void cygwin_set_dr (int i, CORE_ADDR addr); |
| 207 | static void cygwin_set_dr7 (unsigned long val); |
| 208 | static CORE_ADDR cygwin_get_dr (int i); |
| 209 | static unsigned long cygwin_get_dr6 (void); |
| 210 | static unsigned long cygwin_get_dr7 (void); |
| 211 | |
| 212 | static enum gdb_signal last_sig = GDB_SIGNAL_0; |
| 213 | /* Set if a signal was received from the debugged process. */ |
| 214 | |
| 215 | /* Thread information structure used to track information that is |
| 216 | not available in gdb's thread structure. */ |
| 217 | typedef struct windows_thread_info_struct |
| 218 | { |
| 219 | struct windows_thread_info_struct *next; |
| 220 | DWORD id; |
| 221 | HANDLE h; |
| 222 | CORE_ADDR thread_local_base; |
| 223 | char *name; |
| 224 | int suspended; |
| 225 | int reload_context; |
| 226 | CONTEXT context; |
| 227 | STACKFRAME sf; |
| 228 | } |
| 229 | windows_thread_info; |
| 230 | |
| 231 | static windows_thread_info thread_head; |
| 232 | |
| 233 | /* The process and thread handles for the above context. */ |
| 234 | |
| 235 | static DEBUG_EVENT current_event; /* The current debug event from |
| 236 | WaitForDebugEvent */ |
| 237 | static HANDLE current_process_handle; /* Currently executing process */ |
| 238 | static windows_thread_info *current_thread; /* Info on currently selected thread */ |
| 239 | static DWORD main_thread_id; /* Thread ID of the main thread */ |
| 240 | |
| 241 | /* Counts of things. */ |
| 242 | static int exception_count = 0; |
| 243 | static int event_count = 0; |
| 244 | static int saw_create; |
| 245 | static int open_process_used = 0; |
| 246 | |
| 247 | /* User options. */ |
| 248 | static int new_console = 0; |
| 249 | #ifdef __CYGWIN__ |
| 250 | static int cygwin_exceptions = 0; |
| 251 | #endif |
| 252 | static int new_group = 1; |
| 253 | static int debug_exec = 0; /* show execution */ |
| 254 | static int debug_events = 0; /* show events from kernel */ |
| 255 | static int debug_memory = 0; /* show target memory accesses */ |
| 256 | static int debug_exceptions = 0; /* show target exceptions */ |
| 257 | static int useshell = 0; /* use shell for subprocesses */ |
| 258 | |
| 259 | /* This vector maps GDB's idea of a register's number into an offset |
| 260 | in the windows exception context vector. |
| 261 | |
| 262 | It also contains the bit mask needed to load the register in question. |
| 263 | |
| 264 | The contents of this table can only be computed by the units |
| 265 | that provide CPU-specific support for Windows native debugging. |
| 266 | These units should set the table by calling |
| 267 | windows_set_context_register_offsets. |
| 268 | |
| 269 | One day we could read a reg, we could inspect the context we |
| 270 | already have loaded, if it doesn't have the bit set that we need, |
| 271 | we read that set of registers in using GetThreadContext. If the |
| 272 | context already contains what we need, we just unpack it. Then to |
| 273 | write a register, first we have to ensure that the context contains |
| 274 | the other regs of the group, and then we copy the info in and set |
| 275 | out bit. */ |
| 276 | |
| 277 | static const int *mappings; |
| 278 | |
| 279 | /* The function to use in order to determine whether a register is |
| 280 | a segment register or not. */ |
| 281 | static segment_register_p_ftype *segment_register_p; |
| 282 | |
| 283 | /* This vector maps the target's idea of an exception (extracted |
| 284 | from the DEBUG_EVENT structure) to GDB's idea. */ |
| 285 | |
| 286 | struct xlate_exception |
| 287 | { |
| 288 | int them; |
| 289 | enum gdb_signal us; |
| 290 | }; |
| 291 | |
| 292 | static const struct xlate_exception |
| 293 | xlate[] = |
| 294 | { |
| 295 | {EXCEPTION_ACCESS_VIOLATION, GDB_SIGNAL_SEGV}, |
| 296 | {STATUS_STACK_OVERFLOW, GDB_SIGNAL_SEGV}, |
| 297 | {EXCEPTION_BREAKPOINT, GDB_SIGNAL_TRAP}, |
| 298 | {DBG_CONTROL_C, GDB_SIGNAL_INT}, |
| 299 | {EXCEPTION_SINGLE_STEP, GDB_SIGNAL_TRAP}, |
| 300 | {STATUS_FLOAT_DIVIDE_BY_ZERO, GDB_SIGNAL_FPE}, |
| 301 | {-1, GDB_SIGNAL_UNKNOWN}}; |
| 302 | |
| 303 | /* Set the MAPPINGS static global to OFFSETS. |
| 304 | See the description of MAPPINGS for more details. */ |
| 305 | |
| 306 | void |
| 307 | windows_set_context_register_offsets (const int *offsets) |
| 308 | { |
| 309 | mappings = offsets; |
| 310 | } |
| 311 | |
| 312 | /* See windows-nat.h. */ |
| 313 | |
| 314 | void |
| 315 | windows_set_segment_register_p (segment_register_p_ftype *fun) |
| 316 | { |
| 317 | segment_register_p = fun; |
| 318 | } |
| 319 | |
| 320 | static void |
| 321 | check (BOOL ok, const char *file, int line) |
| 322 | { |
| 323 | if (!ok) |
| 324 | printf_filtered ("error return %s:%d was %u\n", file, line, |
| 325 | (unsigned) GetLastError ()); |
| 326 | } |
| 327 | |
| 328 | /* Find a thread record given a thread id. If GET_CONTEXT is not 0, |
| 329 | then also retrieve the context for this thread. If GET_CONTEXT is |
| 330 | negative, then don't suspend the thread. */ |
| 331 | static windows_thread_info * |
| 332 | thread_rec (DWORD id, int get_context) |
| 333 | { |
| 334 | windows_thread_info *th; |
| 335 | |
| 336 | for (th = &thread_head; (th = th->next) != NULL;) |
| 337 | if (th->id == id) |
| 338 | { |
| 339 | if (!th->suspended && get_context) |
| 340 | { |
| 341 | if (get_context > 0 && id != current_event.dwThreadId) |
| 342 | { |
| 343 | if (SuspendThread (th->h) == (DWORD) -1) |
| 344 | { |
| 345 | DWORD err = GetLastError (); |
| 346 | |
| 347 | /* We get Access Denied (5) when trying to suspend |
| 348 | threads that Windows started on behalf of the |
| 349 | debuggee, usually when those threads are just |
| 350 | about to exit. |
| 351 | We can get Invalid Handle (6) if the main thread |
| 352 | has exited. */ |
| 353 | if (err != ERROR_INVALID_HANDLE |
| 354 | && err != ERROR_ACCESS_DENIED) |
| 355 | warning (_("SuspendThread (tid=0x%x) failed." |
| 356 | " (winerr %u)"), |
| 357 | (unsigned) id, (unsigned) err); |
| 358 | th->suspended = -1; |
| 359 | } |
| 360 | else |
| 361 | th->suspended = 1; |
| 362 | } |
| 363 | else if (get_context < 0) |
| 364 | th->suspended = -1; |
| 365 | th->reload_context = 1; |
| 366 | } |
| 367 | return th; |
| 368 | } |
| 369 | |
| 370 | return NULL; |
| 371 | } |
| 372 | |
| 373 | /* Add a thread to the thread list. */ |
| 374 | static windows_thread_info * |
| 375 | windows_add_thread (ptid_t ptid, HANDLE h, void *tlb) |
| 376 | { |
| 377 | windows_thread_info *th; |
| 378 | DWORD id; |
| 379 | |
| 380 | gdb_assert (ptid_get_tid (ptid) != 0); |
| 381 | |
| 382 | id = ptid_get_tid (ptid); |
| 383 | |
| 384 | if ((th = thread_rec (id, FALSE))) |
| 385 | return th; |
| 386 | |
| 387 | th = XCNEW (windows_thread_info); |
| 388 | th->id = id; |
| 389 | th->h = h; |
| 390 | th->thread_local_base = (CORE_ADDR) (uintptr_t) tlb; |
| 391 | th->next = thread_head.next; |
| 392 | thread_head.next = th; |
| 393 | add_thread (ptid); |
| 394 | /* Set the debug registers for the new thread if they are used. */ |
| 395 | if (debug_registers_used) |
| 396 | { |
| 397 | /* Only change the value of the debug registers. */ |
| 398 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 399 | CHECK (GetThreadContext (th->h, &th->context)); |
| 400 | th->context.Dr0 = dr[0]; |
| 401 | th->context.Dr1 = dr[1]; |
| 402 | th->context.Dr2 = dr[2]; |
| 403 | th->context.Dr3 = dr[3]; |
| 404 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 405 | th->context.Dr7 = dr[7]; |
| 406 | CHECK (SetThreadContext (th->h, &th->context)); |
| 407 | th->context.ContextFlags = 0; |
| 408 | } |
| 409 | return th; |
| 410 | } |
| 411 | |
| 412 | /* Clear out any old thread list and reinitialize it to a |
| 413 | pristine state. */ |
| 414 | static void |
| 415 | windows_init_thread_list (void) |
| 416 | { |
| 417 | windows_thread_info *th = &thread_head; |
| 418 | |
| 419 | DEBUG_EVENTS (("gdb: windows_init_thread_list\n")); |
| 420 | init_thread_list (); |
| 421 | while (th->next != NULL) |
| 422 | { |
| 423 | windows_thread_info *here = th->next; |
| 424 | th->next = here->next; |
| 425 | xfree (here); |
| 426 | } |
| 427 | thread_head.next = NULL; |
| 428 | } |
| 429 | |
| 430 | /* Delete a thread from the list of threads. */ |
| 431 | static void |
| 432 | windows_delete_thread (ptid_t ptid, DWORD exit_code) |
| 433 | { |
| 434 | windows_thread_info *th; |
| 435 | DWORD id; |
| 436 | |
| 437 | gdb_assert (ptid_get_tid (ptid) != 0); |
| 438 | |
| 439 | id = ptid_get_tid (ptid); |
| 440 | |
| 441 | if (info_verbose) |
| 442 | printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid)); |
| 443 | else if (print_thread_events && id != main_thread_id) |
| 444 | printf_unfiltered (_("[%s exited with code %u]\n"), |
| 445 | target_pid_to_str (ptid), (unsigned) exit_code); |
| 446 | delete_thread (ptid); |
| 447 | |
| 448 | for (th = &thread_head; |
| 449 | th->next != NULL && th->next->id != id; |
| 450 | th = th->next) |
| 451 | continue; |
| 452 | |
| 453 | if (th->next != NULL) |
| 454 | { |
| 455 | windows_thread_info *here = th->next; |
| 456 | th->next = here->next; |
| 457 | xfree (here->name); |
| 458 | xfree (here); |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | static void |
| 463 | do_windows_fetch_inferior_registers (struct regcache *regcache, |
| 464 | windows_thread_info *th, int r) |
| 465 | { |
| 466 | char *context_offset = ((char *) &th->context) + mappings[r]; |
| 467 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 468 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 469 | long l; |
| 470 | |
| 471 | if (th->reload_context) |
| 472 | { |
| 473 | #ifdef __CYGWIN__ |
| 474 | if (have_saved_context) |
| 475 | { |
| 476 | /* Lie about where the program actually is stopped since |
| 477 | cygwin has informed us that we should consider the signal |
| 478 | to have occurred at another location which is stored in |
| 479 | "saved_context. */ |
| 480 | memcpy (&th->context, &saved_context, |
| 481 | __COPY_CONTEXT_SIZE); |
| 482 | have_saved_context = 0; |
| 483 | } |
| 484 | else |
| 485 | #endif |
| 486 | { |
| 487 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; |
| 488 | CHECK (GetThreadContext (th->h, &th->context)); |
| 489 | /* Copy dr values from that thread. |
| 490 | But only if there were not modified since last stop. |
| 491 | PR gdb/2388 */ |
| 492 | if (!debug_registers_changed) |
| 493 | { |
| 494 | dr[0] = th->context.Dr0; |
| 495 | dr[1] = th->context.Dr1; |
| 496 | dr[2] = th->context.Dr2; |
| 497 | dr[3] = th->context.Dr3; |
| 498 | dr[6] = th->context.Dr6; |
| 499 | dr[7] = th->context.Dr7; |
| 500 | } |
| 501 | } |
| 502 | th->reload_context = 0; |
| 503 | } |
| 504 | |
| 505 | if (r == I387_FISEG_REGNUM (tdep)) |
| 506 | { |
| 507 | l = *((long *) context_offset) & 0xffff; |
| 508 | regcache_raw_supply (regcache, r, (char *) &l); |
| 509 | } |
| 510 | else if (r == I387_FOP_REGNUM (tdep)) |
| 511 | { |
| 512 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); |
| 513 | regcache_raw_supply (regcache, r, (char *) &l); |
| 514 | } |
| 515 | else if (segment_register_p (r)) |
| 516 | { |
| 517 | /* GDB treats segment registers as 32bit registers, but they are |
| 518 | in fact only 16 bits long. Make sure we do not read extra |
| 519 | bits from our source buffer. */ |
| 520 | l = *((long *) context_offset) & 0xffff; |
| 521 | regcache_raw_supply (regcache, r, (char *) &l); |
| 522 | } |
| 523 | else if (r >= 0) |
| 524 | regcache_raw_supply (regcache, r, context_offset); |
| 525 | else |
| 526 | { |
| 527 | for (r = 0; r < gdbarch_num_regs (gdbarch); r++) |
| 528 | do_windows_fetch_inferior_registers (regcache, th, r); |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | static void |
| 533 | windows_fetch_inferior_registers (struct target_ops *ops, |
| 534 | struct regcache *regcache, int r) |
| 535 | { |
| 536 | DWORD pid = ptid_get_tid (regcache_get_ptid (regcache)); |
| 537 | windows_thread_info *th = thread_rec (pid, TRUE); |
| 538 | |
| 539 | /* Check if TH exists. Windows sometimes uses a non-existent |
| 540 | thread id in its events. */ |
| 541 | if (th != NULL) |
| 542 | do_windows_fetch_inferior_registers (regcache, th, r); |
| 543 | } |
| 544 | |
| 545 | static void |
| 546 | do_windows_store_inferior_registers (const struct regcache *regcache, |
| 547 | windows_thread_info *th, int r) |
| 548 | { |
| 549 | if (r >= 0) |
| 550 | regcache_raw_collect (regcache, r, |
| 551 | ((char *) &th->context) + mappings[r]); |
| 552 | else |
| 553 | { |
| 554 | for (r = 0; r < gdbarch_num_regs (get_regcache_arch (regcache)); r++) |
| 555 | do_windows_store_inferior_registers (regcache, th, r); |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | /* Store a new register value into the context of the thread tied to |
| 560 | REGCACHE. */ |
| 561 | static void |
| 562 | windows_store_inferior_registers (struct target_ops *ops, |
| 563 | struct regcache *regcache, int r) |
| 564 | { |
| 565 | DWORD pid = ptid_get_tid (regcache_get_ptid (regcache)); |
| 566 | windows_thread_info *th = thread_rec (pid, TRUE); |
| 567 | |
| 568 | /* Check if TH exists. Windows sometimes uses a non-existent |
| 569 | thread id in its events. */ |
| 570 | if (th != NULL) |
| 571 | do_windows_store_inferior_registers (regcache, th, r); |
| 572 | } |
| 573 | |
| 574 | /* Encapsulate the information required in a call to |
| 575 | symbol_file_add_args. */ |
| 576 | struct safe_symbol_file_add_args |
| 577 | { |
| 578 | char *name; |
| 579 | int from_tty; |
| 580 | struct section_addr_info *addrs; |
| 581 | int mainline; |
| 582 | int flags; |
| 583 | struct ui_file *err, *out; |
| 584 | struct objfile *ret; |
| 585 | }; |
| 586 | |
| 587 | /* Maintain a linked list of "so" information. */ |
| 588 | struct lm_info |
| 589 | { |
| 590 | LPVOID load_addr; |
| 591 | }; |
| 592 | |
| 593 | static struct so_list solib_start, *solib_end; |
| 594 | |
| 595 | static struct so_list * |
| 596 | windows_make_so (const char *name, LPVOID load_addr) |
| 597 | { |
| 598 | struct so_list *so; |
| 599 | char *p; |
| 600 | #ifndef __CYGWIN__ |
| 601 | char buf[__PMAX]; |
| 602 | char cwd[__PMAX]; |
| 603 | WIN32_FIND_DATA w32_fd; |
| 604 | HANDLE h = FindFirstFile(name, &w32_fd); |
| 605 | |
| 606 | if (h == INVALID_HANDLE_VALUE) |
| 607 | strcpy (buf, name); |
| 608 | else |
| 609 | { |
| 610 | FindClose (h); |
| 611 | strcpy (buf, name); |
| 612 | if (GetCurrentDirectory (MAX_PATH + 1, cwd)) |
| 613 | { |
| 614 | p = strrchr (buf, '\\'); |
| 615 | if (p) |
| 616 | p[1] = '\0'; |
| 617 | SetCurrentDirectory (buf); |
| 618 | GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p); |
| 619 | SetCurrentDirectory (cwd); |
| 620 | } |
| 621 | } |
| 622 | if (strcasecmp (buf, "ntdll.dll") == 0) |
| 623 | { |
| 624 | GetSystemDirectory (buf, sizeof (buf)); |
| 625 | strcat (buf, "\\ntdll.dll"); |
| 626 | } |
| 627 | #else |
| 628 | cygwin_buf_t buf[__PMAX]; |
| 629 | |
| 630 | buf[0] = 0; |
| 631 | if (access (name, F_OK) != 0) |
| 632 | { |
| 633 | if (strcasecmp (name, "ntdll.dll") == 0) |
| 634 | #ifdef __USEWIDE |
| 635 | { |
| 636 | GetSystemDirectoryW (buf, sizeof (buf) / sizeof (wchar_t)); |
| 637 | wcscat (buf, L"\\ntdll.dll"); |
| 638 | } |
| 639 | #else |
| 640 | { |
| 641 | GetSystemDirectoryA (buf, sizeof (buf) / sizeof (wchar_t)); |
| 642 | strcat (buf, "\\ntdll.dll"); |
| 643 | } |
| 644 | #endif |
| 645 | } |
| 646 | #endif |
| 647 | so = XCNEW (struct so_list); |
| 648 | so->lm_info = XNEW (struct lm_info); |
| 649 | so->lm_info->load_addr = load_addr; |
| 650 | strcpy (so->so_original_name, name); |
| 651 | #ifndef __CYGWIN__ |
| 652 | strcpy (so->so_name, buf); |
| 653 | #else |
| 654 | if (buf[0]) |
| 655 | cygwin_conv_path (CCP_WIN_W_TO_POSIX, buf, so->so_name, |
| 656 | SO_NAME_MAX_PATH_SIZE); |
| 657 | else |
| 658 | { |
| 659 | char *rname = realpath (name, NULL); |
| 660 | if (rname && strlen (rname) < SO_NAME_MAX_PATH_SIZE) |
| 661 | { |
| 662 | strcpy (so->so_name, rname); |
| 663 | free (rname); |
| 664 | } |
| 665 | else |
| 666 | error (_("dll path too long")); |
| 667 | } |
| 668 | /* Record cygwin1.dll .text start/end. */ |
| 669 | p = strchr (so->so_name, '\0') - (sizeof ("/cygwin1.dll") - 1); |
| 670 | if (p >= so->so_name && strcasecmp (p, "/cygwin1.dll") == 0) |
| 671 | { |
| 672 | asection *text = NULL; |
| 673 | CORE_ADDR text_vma; |
| 674 | |
| 675 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (so->so_name, "pei-i386", -1)); |
| 676 | |
| 677 | if (abfd == NULL) |
| 678 | return so; |
| 679 | |
| 680 | if (bfd_check_format (abfd.get (), bfd_object)) |
| 681 | text = bfd_get_section_by_name (abfd.get (), ".text"); |
| 682 | |
| 683 | if (!text) |
| 684 | return so; |
| 685 | |
| 686 | /* The symbols in a dll are offset by 0x1000, which is the |
| 687 | offset from 0 of the first byte in an image - because of the |
| 688 | file header and the section alignment. */ |
| 689 | cygwin_load_start = (CORE_ADDR) (uintptr_t) ((char *) |
| 690 | load_addr + 0x1000); |
| 691 | cygwin_load_end = cygwin_load_start + bfd_section_size (abfd.get (), |
| 692 | text); |
| 693 | } |
| 694 | #endif |
| 695 | |
| 696 | return so; |
| 697 | } |
| 698 | |
| 699 | static char * |
| 700 | get_image_name (HANDLE h, void *address, int unicode) |
| 701 | { |
| 702 | #ifdef __CYGWIN__ |
| 703 | static char buf[__PMAX]; |
| 704 | #else |
| 705 | static char buf[(2 * __PMAX) + 1]; |
| 706 | #endif |
| 707 | DWORD size = unicode ? sizeof (WCHAR) : sizeof (char); |
| 708 | char *address_ptr; |
| 709 | int len = 0; |
| 710 | char b[2]; |
| 711 | SIZE_T done; |
| 712 | |
| 713 | /* Attempt to read the name of the dll that was detected. |
| 714 | This is documented to work only when actively debugging |
| 715 | a program. It will not work for attached processes. */ |
| 716 | if (address == NULL) |
| 717 | return NULL; |
| 718 | |
| 719 | /* See if we could read the address of a string, and that the |
| 720 | address isn't null. */ |
| 721 | if (!ReadProcessMemory (h, address, &address_ptr, |
| 722 | sizeof (address_ptr), &done) |
| 723 | || done != sizeof (address_ptr) || !address_ptr) |
| 724 | return NULL; |
| 725 | |
| 726 | /* Find the length of the string. */ |
| 727 | while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done) |
| 728 | && (b[0] != 0 || b[size - 1] != 0) && done == size) |
| 729 | continue; |
| 730 | |
| 731 | if (!unicode) |
| 732 | ReadProcessMemory (h, address_ptr, buf, len, &done); |
| 733 | else |
| 734 | { |
| 735 | WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR)); |
| 736 | ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR), |
| 737 | &done); |
| 738 | #ifdef __CYGWIN__ |
| 739 | wcstombs (buf, unicode_address, __PMAX); |
| 740 | #else |
| 741 | WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, sizeof buf, |
| 742 | 0, 0); |
| 743 | #endif |
| 744 | } |
| 745 | |
| 746 | return buf; |
| 747 | } |
| 748 | |
| 749 | /* Handle a DLL load event, and return 1. |
| 750 | |
| 751 | This function assumes that this event did not occur during inferior |
| 752 | initialization, where their event info may be incomplete (see |
| 753 | do_initial_windows_stuff and windows_add_all_dlls for more info |
| 754 | on how we handle DLL loading during that phase). */ |
| 755 | |
| 756 | static int |
| 757 | handle_load_dll (void *dummy) |
| 758 | { |
| 759 | LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; |
| 760 | char *dll_name; |
| 761 | |
| 762 | /* Try getting the DLL name via the lpImageName field of the event. |
| 763 | Note that Microsoft documents this fields as strictly optional, |
| 764 | in the sense that it might be NULL. And the first DLL event in |
| 765 | particular is explicitly documented as "likely not pass[ed]" |
| 766 | (source: MSDN LOAD_DLL_DEBUG_INFO structure). */ |
| 767 | dll_name = get_image_name (current_process_handle, |
| 768 | event->lpImageName, event->fUnicode); |
| 769 | if (!dll_name) |
| 770 | return 1; |
| 771 | |
| 772 | solib_end->next = windows_make_so (dll_name, event->lpBaseOfDll); |
| 773 | solib_end = solib_end->next; |
| 774 | |
| 775 | DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end->so_name, |
| 776 | host_address_to_string (solib_end->lm_info->load_addr))); |
| 777 | |
| 778 | return 1; |
| 779 | } |
| 780 | |
| 781 | static void |
| 782 | windows_free_so (struct so_list *so) |
| 783 | { |
| 784 | if (so->lm_info) |
| 785 | xfree (so->lm_info); |
| 786 | xfree (so); |
| 787 | } |
| 788 | |
| 789 | /* Handle a DLL unload event. |
| 790 | Return 1 if successful, or zero otherwise. |
| 791 | |
| 792 | This function assumes that this event did not occur during inferior |
| 793 | initialization, where their event info may be incomplete (see |
| 794 | do_initial_windows_stuff and windows_add_all_dlls for more info |
| 795 | on how we handle DLL loading during that phase). */ |
| 796 | |
| 797 | static int |
| 798 | handle_unload_dll (void *dummy) |
| 799 | { |
| 800 | LPVOID lpBaseOfDll = current_event.u.UnloadDll.lpBaseOfDll; |
| 801 | struct so_list *so; |
| 802 | |
| 803 | for (so = &solib_start; so->next != NULL; so = so->next) |
| 804 | if (so->next->lm_info->load_addr == lpBaseOfDll) |
| 805 | { |
| 806 | struct so_list *sodel = so->next; |
| 807 | |
| 808 | so->next = sodel->next; |
| 809 | if (!so->next) |
| 810 | solib_end = so; |
| 811 | DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel->so_name)); |
| 812 | |
| 813 | windows_free_so (sodel); |
| 814 | return 1; |
| 815 | } |
| 816 | |
| 817 | /* We did not find any DLL that was previously loaded at this address, |
| 818 | so register a complaint. We do not report an error, because we have |
| 819 | observed that this may be happening under some circumstances. For |
| 820 | instance, running 32bit applications on x64 Windows causes us to receive |
| 821 | 4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these |
| 822 | events are apparently caused by the WOW layer, the interface between |
| 823 | 32bit and 64bit worlds). */ |
| 824 | complaint (&symfile_complaints, _("dll starting at %s not found."), |
| 825 | host_address_to_string (lpBaseOfDll)); |
| 826 | |
| 827 | return 0; |
| 828 | } |
| 829 | |
| 830 | /* Clear list of loaded DLLs. */ |
| 831 | static void |
| 832 | windows_clear_solib (void) |
| 833 | { |
| 834 | solib_start.next = NULL; |
| 835 | solib_end = &solib_start; |
| 836 | } |
| 837 | |
| 838 | static void |
| 839 | signal_event_command (char *args, int from_tty) |
| 840 | { |
| 841 | uintptr_t event_id = 0; |
| 842 | char *endargs = NULL; |
| 843 | |
| 844 | if (args == NULL) |
| 845 | error (_("signal-event requires an argument (integer event id)")); |
| 846 | |
| 847 | event_id = strtoumax (args, &endargs, 10); |
| 848 | |
| 849 | if ((errno == ERANGE) || (event_id == 0) || (event_id > UINTPTR_MAX) || |
| 850 | ((HANDLE) event_id == INVALID_HANDLE_VALUE)) |
| 851 | error (_("Failed to convert `%s' to event id"), args); |
| 852 | |
| 853 | SetEvent ((HANDLE) event_id); |
| 854 | CloseHandle ((HANDLE) event_id); |
| 855 | } |
| 856 | |
| 857 | /* Handle DEBUG_STRING output from child process. |
| 858 | Cygwin prepends its messages with a "cygwin:". Interpret this as |
| 859 | a Cygwin signal. Otherwise just print the string as a warning. */ |
| 860 | static int |
| 861 | handle_output_debug_string (struct target_waitstatus *ourstatus) |
| 862 | { |
| 863 | char *s = NULL; |
| 864 | int retval = 0; |
| 865 | |
| 866 | if (!target_read_string |
| 867 | ((CORE_ADDR) (uintptr_t) current_event.u.DebugString.lpDebugStringData, |
| 868 | &s, 1024, 0) |
| 869 | || !s || !*s) |
| 870 | /* nothing to do */; |
| 871 | else if (!startswith (s, _CYGWIN_SIGNAL_STRING)) |
| 872 | { |
| 873 | #ifdef __CYGWIN__ |
| 874 | if (!startswith (s, "cYg")) |
| 875 | #endif |
| 876 | { |
| 877 | char *p = strchr (s, '\0'); |
| 878 | |
| 879 | if (p > s && *--p == '\n') |
| 880 | *p = '\0'; |
| 881 | warning (("%s"), s); |
| 882 | } |
| 883 | } |
| 884 | #ifdef __CYGWIN__ |
| 885 | else |
| 886 | { |
| 887 | /* Got a cygwin signal marker. A cygwin signal is followed by |
| 888 | the signal number itself and then optionally followed by the |
| 889 | thread id and address to saved context within the DLL. If |
| 890 | these are supplied, then the given thread is assumed to have |
| 891 | issued the signal and the context from the thread is assumed |
| 892 | to be stored at the given address in the inferior. Tell gdb |
| 893 | to treat this like a real signal. */ |
| 894 | char *p; |
| 895 | int sig = strtol (s + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0); |
| 896 | gdb_signal gotasig = gdb_signal_from_host (sig); |
| 897 | |
| 898 | ourstatus->value.sig = gotasig; |
| 899 | if (gotasig) |
| 900 | { |
| 901 | LPCVOID x; |
| 902 | SIZE_T n; |
| 903 | |
| 904 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 905 | retval = strtoul (p, &p, 0); |
| 906 | if (!retval) |
| 907 | retval = main_thread_id; |
| 908 | else if ((x = (LPCVOID) (uintptr_t) strtoull (p, NULL, 0)) |
| 909 | && ReadProcessMemory (current_process_handle, x, |
| 910 | &saved_context, |
| 911 | __COPY_CONTEXT_SIZE, &n) |
| 912 | && n == __COPY_CONTEXT_SIZE) |
| 913 | have_saved_context = 1; |
| 914 | } |
| 915 | } |
| 916 | #endif |
| 917 | |
| 918 | if (s) |
| 919 | xfree (s); |
| 920 | return retval; |
| 921 | } |
| 922 | |
| 923 | static int |
| 924 | display_selector (HANDLE thread, DWORD sel) |
| 925 | { |
| 926 | LDT_ENTRY info; |
| 927 | if (GetThreadSelectorEntry (thread, sel, &info)) |
| 928 | { |
| 929 | int base, limit; |
| 930 | printf_filtered ("0x%03x: ", (unsigned) sel); |
| 931 | if (!info.HighWord.Bits.Pres) |
| 932 | { |
| 933 | puts_filtered ("Segment not present\n"); |
| 934 | return 0; |
| 935 | } |
| 936 | base = (info.HighWord.Bits.BaseHi << 24) + |
| 937 | (info.HighWord.Bits.BaseMid << 16) |
| 938 | + info.BaseLow; |
| 939 | limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow; |
| 940 | if (info.HighWord.Bits.Granularity) |
| 941 | limit = (limit << 12) | 0xfff; |
| 942 | printf_filtered ("base=0x%08x limit=0x%08x", base, limit); |
| 943 | if (info.HighWord.Bits.Default_Big) |
| 944 | puts_filtered(" 32-bit "); |
| 945 | else |
| 946 | puts_filtered(" 16-bit "); |
| 947 | switch ((info.HighWord.Bits.Type & 0xf) >> 1) |
| 948 | { |
| 949 | case 0: |
| 950 | puts_filtered ("Data (Read-Only, Exp-up"); |
| 951 | break; |
| 952 | case 1: |
| 953 | puts_filtered ("Data (Read/Write, Exp-up"); |
| 954 | break; |
| 955 | case 2: |
| 956 | puts_filtered ("Unused segment ("); |
| 957 | break; |
| 958 | case 3: |
| 959 | puts_filtered ("Data (Read/Write, Exp-down"); |
| 960 | break; |
| 961 | case 4: |
| 962 | puts_filtered ("Code (Exec-Only, N.Conf"); |
| 963 | break; |
| 964 | case 5: |
| 965 | puts_filtered ("Code (Exec/Read, N.Conf"); |
| 966 | break; |
| 967 | case 6: |
| 968 | puts_filtered ("Code (Exec-Only, Conf"); |
| 969 | break; |
| 970 | case 7: |
| 971 | puts_filtered ("Code (Exec/Read, Conf"); |
| 972 | break; |
| 973 | default: |
| 974 | printf_filtered ("Unknown type 0x%x",info.HighWord.Bits.Type); |
| 975 | } |
| 976 | if ((info.HighWord.Bits.Type & 0x1) == 0) |
| 977 | puts_filtered(", N.Acc"); |
| 978 | puts_filtered (")\n"); |
| 979 | if ((info.HighWord.Bits.Type & 0x10) == 0) |
| 980 | puts_filtered("System selector "); |
| 981 | printf_filtered ("Priviledge level = %d. ", info.HighWord.Bits.Dpl); |
| 982 | if (info.HighWord.Bits.Granularity) |
| 983 | puts_filtered ("Page granular.\n"); |
| 984 | else |
| 985 | puts_filtered ("Byte granular.\n"); |
| 986 | return 1; |
| 987 | } |
| 988 | else |
| 989 | { |
| 990 | DWORD err = GetLastError (); |
| 991 | if (err == ERROR_NOT_SUPPORTED) |
| 992 | printf_filtered ("Function not supported\n"); |
| 993 | else |
| 994 | printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel); |
| 995 | return 0; |
| 996 | } |
| 997 | } |
| 998 | |
| 999 | static void |
| 1000 | display_selectors (char * args, int from_tty) |
| 1001 | { |
| 1002 | if (!current_thread) |
| 1003 | { |
| 1004 | puts_filtered ("Impossible to display selectors now.\n"); |
| 1005 | return; |
| 1006 | } |
| 1007 | if (!args) |
| 1008 | { |
| 1009 | |
| 1010 | puts_filtered ("Selector $cs\n"); |
| 1011 | display_selector (current_thread->h, |
| 1012 | current_thread->context.SegCs); |
| 1013 | puts_filtered ("Selector $ds\n"); |
| 1014 | display_selector (current_thread->h, |
| 1015 | current_thread->context.SegDs); |
| 1016 | puts_filtered ("Selector $es\n"); |
| 1017 | display_selector (current_thread->h, |
| 1018 | current_thread->context.SegEs); |
| 1019 | puts_filtered ("Selector $ss\n"); |
| 1020 | display_selector (current_thread->h, |
| 1021 | current_thread->context.SegSs); |
| 1022 | puts_filtered ("Selector $fs\n"); |
| 1023 | display_selector (current_thread->h, |
| 1024 | current_thread->context.SegFs); |
| 1025 | puts_filtered ("Selector $gs\n"); |
| 1026 | display_selector (current_thread->h, |
| 1027 | current_thread->context.SegGs); |
| 1028 | } |
| 1029 | else |
| 1030 | { |
| 1031 | int sel; |
| 1032 | sel = parse_and_eval_long (args); |
| 1033 | printf_filtered ("Selector \"%s\"\n",args); |
| 1034 | display_selector (current_thread->h, sel); |
| 1035 | } |
| 1036 | } |
| 1037 | |
| 1038 | #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \ |
| 1039 | printf_unfiltered ("gdb: Target exception %s at %s\n", x, \ |
| 1040 | host_address_to_string (\ |
| 1041 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)) |
| 1042 | |
| 1043 | static handle_exception_result |
| 1044 | handle_exception (struct target_waitstatus *ourstatus) |
| 1045 | { |
| 1046 | EXCEPTION_RECORD *rec = ¤t_event.u.Exception.ExceptionRecord; |
| 1047 | DWORD code = rec->ExceptionCode; |
| 1048 | handle_exception_result result = HANDLE_EXCEPTION_HANDLED; |
| 1049 | |
| 1050 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 1051 | |
| 1052 | /* Record the context of the current thread. */ |
| 1053 | thread_rec (current_event.dwThreadId, -1); |
| 1054 | |
| 1055 | switch (code) |
| 1056 | { |
| 1057 | case EXCEPTION_ACCESS_VIOLATION: |
| 1058 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION"); |
| 1059 | ourstatus->value.sig = GDB_SIGNAL_SEGV; |
| 1060 | #ifdef __CYGWIN__ |
| 1061 | { |
| 1062 | /* See if the access violation happened within the cygwin DLL |
| 1063 | itself. Cygwin uses a kind of exception handling to deal |
| 1064 | with passed-in invalid addresses. gdb should not treat |
| 1065 | these as real SEGVs since they will be silently handled by |
| 1066 | cygwin. A real SEGV will (theoretically) be caught by |
| 1067 | cygwin later in the process and will be sent as a |
| 1068 | cygwin-specific-signal. So, ignore SEGVs if they show up |
| 1069 | within the text segment of the DLL itself. */ |
| 1070 | const char *fn; |
| 1071 | CORE_ADDR addr = (CORE_ADDR) (uintptr_t) rec->ExceptionAddress; |
| 1072 | |
| 1073 | if ((!cygwin_exceptions && (addr >= cygwin_load_start |
| 1074 | && addr < cygwin_load_end)) |
| 1075 | || (find_pc_partial_function (addr, &fn, NULL, NULL) |
| 1076 | && startswith (fn, "KERNEL32!IsBad"))) |
| 1077 | return HANDLE_EXCEPTION_UNHANDLED; |
| 1078 | } |
| 1079 | #endif |
| 1080 | break; |
| 1081 | case STATUS_STACK_OVERFLOW: |
| 1082 | DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW"); |
| 1083 | ourstatus->value.sig = GDB_SIGNAL_SEGV; |
| 1084 | break; |
| 1085 | case STATUS_FLOAT_DENORMAL_OPERAND: |
| 1086 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND"); |
| 1087 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1088 | break; |
| 1089 | case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: |
| 1090 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED"); |
| 1091 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1092 | break; |
| 1093 | case STATUS_FLOAT_INEXACT_RESULT: |
| 1094 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT"); |
| 1095 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1096 | break; |
| 1097 | case STATUS_FLOAT_INVALID_OPERATION: |
| 1098 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION"); |
| 1099 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1100 | break; |
| 1101 | case STATUS_FLOAT_OVERFLOW: |
| 1102 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW"); |
| 1103 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1104 | break; |
| 1105 | case STATUS_FLOAT_STACK_CHECK: |
| 1106 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK"); |
| 1107 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1108 | break; |
| 1109 | case STATUS_FLOAT_UNDERFLOW: |
| 1110 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW"); |
| 1111 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1112 | break; |
| 1113 | case STATUS_FLOAT_DIVIDE_BY_ZERO: |
| 1114 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO"); |
| 1115 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1116 | break; |
| 1117 | case STATUS_INTEGER_DIVIDE_BY_ZERO: |
| 1118 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO"); |
| 1119 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1120 | break; |
| 1121 | case STATUS_INTEGER_OVERFLOW: |
| 1122 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW"); |
| 1123 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1124 | break; |
| 1125 | case EXCEPTION_BREAKPOINT: |
| 1126 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT"); |
| 1127 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1128 | break; |
| 1129 | case DBG_CONTROL_C: |
| 1130 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C"); |
| 1131 | ourstatus->value.sig = GDB_SIGNAL_INT; |
| 1132 | break; |
| 1133 | case DBG_CONTROL_BREAK: |
| 1134 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK"); |
| 1135 | ourstatus->value.sig = GDB_SIGNAL_INT; |
| 1136 | break; |
| 1137 | case EXCEPTION_SINGLE_STEP: |
| 1138 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP"); |
| 1139 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1140 | break; |
| 1141 | case EXCEPTION_ILLEGAL_INSTRUCTION: |
| 1142 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION"); |
| 1143 | ourstatus->value.sig = GDB_SIGNAL_ILL; |
| 1144 | break; |
| 1145 | case EXCEPTION_PRIV_INSTRUCTION: |
| 1146 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION"); |
| 1147 | ourstatus->value.sig = GDB_SIGNAL_ILL; |
| 1148 | break; |
| 1149 | case EXCEPTION_NONCONTINUABLE_EXCEPTION: |
| 1150 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION"); |
| 1151 | ourstatus->value.sig = GDB_SIGNAL_ILL; |
| 1152 | break; |
| 1153 | case MS_VC_EXCEPTION: |
| 1154 | if (rec->NumberParameters >= 3 |
| 1155 | && (rec->ExceptionInformation[0] & 0xffffffff) == 0x1000) |
| 1156 | { |
| 1157 | DWORD named_thread_id; |
| 1158 | windows_thread_info *named_thread; |
| 1159 | CORE_ADDR thread_name_target; |
| 1160 | |
| 1161 | DEBUG_EXCEPTION_SIMPLE ("MS_VC_EXCEPTION"); |
| 1162 | |
| 1163 | thread_name_target = rec->ExceptionInformation[1]; |
| 1164 | named_thread_id = (DWORD) (0xffffffff & rec->ExceptionInformation[2]); |
| 1165 | |
| 1166 | if (named_thread_id == (DWORD) -1) |
| 1167 | named_thread_id = current_event.dwThreadId; |
| 1168 | |
| 1169 | named_thread = thread_rec (named_thread_id, 0); |
| 1170 | if (named_thread != NULL) |
| 1171 | { |
| 1172 | int thread_name_len; |
| 1173 | char *thread_name; |
| 1174 | |
| 1175 | thread_name_len = target_read_string (thread_name_target, |
| 1176 | &thread_name, 1025, NULL); |
| 1177 | if (thread_name_len > 0) |
| 1178 | { |
| 1179 | thread_name[thread_name_len - 1] = '\0'; |
| 1180 | xfree (named_thread->name); |
| 1181 | named_thread->name = thread_name; |
| 1182 | } |
| 1183 | else |
| 1184 | xfree (thread_name); |
| 1185 | } |
| 1186 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1187 | result = HANDLE_EXCEPTION_IGNORED; |
| 1188 | break; |
| 1189 | } |
| 1190 | /* treat improperly formed exception as unknown, fallthrough */ |
| 1191 | default: |
| 1192 | /* Treat unhandled first chance exceptions specially. */ |
| 1193 | if (current_event.u.Exception.dwFirstChance) |
| 1194 | return HANDLE_EXCEPTION_UNHANDLED; |
| 1195 | printf_unfiltered ("gdb: unknown target exception 0x%08x at %s\n", |
| 1196 | (unsigned) current_event.u.Exception.ExceptionRecord.ExceptionCode, |
| 1197 | host_address_to_string ( |
| 1198 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
| 1199 | ourstatus->value.sig = GDB_SIGNAL_UNKNOWN; |
| 1200 | break; |
| 1201 | } |
| 1202 | exception_count++; |
| 1203 | last_sig = ourstatus->value.sig; |
| 1204 | return result; |
| 1205 | } |
| 1206 | |
| 1207 | /* Resume thread specified by ID, or all artificially suspended |
| 1208 | threads, if we are continuing execution. KILLED non-zero means we |
| 1209 | have killed the inferior, so we should ignore weird errors due to |
| 1210 | threads shutting down. */ |
| 1211 | static BOOL |
| 1212 | windows_continue (DWORD continue_status, int id, int killed) |
| 1213 | { |
| 1214 | int i; |
| 1215 | windows_thread_info *th; |
| 1216 | BOOL res; |
| 1217 | |
| 1218 | DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=0x%x, %s);\n", |
| 1219 | (unsigned) current_event.dwProcessId, |
| 1220 | (unsigned) current_event.dwThreadId, |
| 1221 | continue_status == DBG_CONTINUE ? |
| 1222 | "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED")); |
| 1223 | |
| 1224 | for (th = &thread_head; (th = th->next) != NULL;) |
| 1225 | if ((id == -1 || id == (int) th->id) |
| 1226 | && th->suspended) |
| 1227 | { |
| 1228 | if (debug_registers_changed) |
| 1229 | { |
| 1230 | th->context.ContextFlags |= CONTEXT_DEBUG_REGISTERS; |
| 1231 | th->context.Dr0 = dr[0]; |
| 1232 | th->context.Dr1 = dr[1]; |
| 1233 | th->context.Dr2 = dr[2]; |
| 1234 | th->context.Dr3 = dr[3]; |
| 1235 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 1236 | th->context.Dr7 = dr[7]; |
| 1237 | } |
| 1238 | if (th->context.ContextFlags) |
| 1239 | { |
| 1240 | DWORD ec = 0; |
| 1241 | |
| 1242 | if (GetExitCodeThread (th->h, &ec) |
| 1243 | && ec == STILL_ACTIVE) |
| 1244 | { |
| 1245 | BOOL status = SetThreadContext (th->h, &th->context); |
| 1246 | |
| 1247 | if (!killed) |
| 1248 | CHECK (status); |
| 1249 | } |
| 1250 | th->context.ContextFlags = 0; |
| 1251 | } |
| 1252 | if (th->suspended > 0) |
| 1253 | (void) ResumeThread (th->h); |
| 1254 | th->suspended = 0; |
| 1255 | } |
| 1256 | |
| 1257 | res = ContinueDebugEvent (current_event.dwProcessId, |
| 1258 | current_event.dwThreadId, |
| 1259 | continue_status); |
| 1260 | |
| 1261 | if (!res) |
| 1262 | error (_("Failed to resume program execution" |
| 1263 | " (ContinueDebugEvent failed, error %u)"), |
| 1264 | (unsigned int) GetLastError ()); |
| 1265 | |
| 1266 | debug_registers_changed = 0; |
| 1267 | return res; |
| 1268 | } |
| 1269 | |
| 1270 | /* Called in pathological case where Windows fails to send a |
| 1271 | CREATE_PROCESS_DEBUG_EVENT after an attach. */ |
| 1272 | static DWORD |
| 1273 | fake_create_process (void) |
| 1274 | { |
| 1275 | current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE, |
| 1276 | current_event.dwProcessId); |
| 1277 | if (current_process_handle != NULL) |
| 1278 | open_process_used = 1; |
| 1279 | else |
| 1280 | { |
| 1281 | error (_("OpenProcess call failed, GetLastError = %u"), |
| 1282 | (unsigned) GetLastError ()); |
| 1283 | /* We can not debug anything in that case. */ |
| 1284 | } |
| 1285 | main_thread_id = current_event.dwThreadId; |
| 1286 | current_thread = windows_add_thread ( |
| 1287 | ptid_build (current_event.dwProcessId, 0, |
| 1288 | current_event.dwThreadId), |
| 1289 | current_event.u.CreateThread.hThread, |
| 1290 | current_event.u.CreateThread.lpThreadLocalBase); |
| 1291 | return main_thread_id; |
| 1292 | } |
| 1293 | |
| 1294 | static void |
| 1295 | windows_resume (struct target_ops *ops, |
| 1296 | ptid_t ptid, int step, enum gdb_signal sig) |
| 1297 | { |
| 1298 | windows_thread_info *th; |
| 1299 | DWORD continue_status = DBG_CONTINUE; |
| 1300 | |
| 1301 | /* A specific PTID means `step only this thread id'. */ |
| 1302 | int resume_all = ptid_equal (ptid, minus_one_ptid); |
| 1303 | |
| 1304 | /* If we're continuing all threads, it's the current inferior that |
| 1305 | should be handled specially. */ |
| 1306 | if (resume_all) |
| 1307 | ptid = inferior_ptid; |
| 1308 | |
| 1309 | if (sig != GDB_SIGNAL_0) |
| 1310 | { |
| 1311 | if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) |
| 1312 | { |
| 1313 | DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig)); |
| 1314 | } |
| 1315 | else if (sig == last_sig) |
| 1316 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1317 | else |
| 1318 | #if 0 |
| 1319 | /* This code does not seem to work, because |
| 1320 | the kernel does probably not consider changes in the ExceptionRecord |
| 1321 | structure when passing the exception to the inferior. |
| 1322 | Note that this seems possible in the exception handler itself. */ |
| 1323 | { |
| 1324 | int i; |
| 1325 | for (i = 0; xlate[i].them != -1; i++) |
| 1326 | if (xlate[i].us == sig) |
| 1327 | { |
| 1328 | current_event.u.Exception.ExceptionRecord.ExceptionCode |
| 1329 | = xlate[i].them; |
| 1330 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1331 | break; |
| 1332 | } |
| 1333 | if (continue_status == DBG_CONTINUE) |
| 1334 | { |
| 1335 | DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig)); |
| 1336 | } |
| 1337 | } |
| 1338 | #endif |
| 1339 | DEBUG_EXCEPT(("Can only continue with received signal %d.\n", |
| 1340 | last_sig)); |
| 1341 | } |
| 1342 | |
| 1343 | last_sig = GDB_SIGNAL_0; |
| 1344 | |
| 1345 | DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=%ld, step=%d, sig=%d);\n", |
| 1346 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, sig)); |
| 1347 | |
| 1348 | /* Get context for currently selected thread. */ |
| 1349 | th = thread_rec (ptid_get_tid (inferior_ptid), FALSE); |
| 1350 | if (th) |
| 1351 | { |
| 1352 | if (step) |
| 1353 | { |
| 1354 | /* Single step by setting t bit. */ |
| 1355 | struct regcache *regcache = get_current_regcache (); |
| 1356 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1357 | windows_fetch_inferior_registers (ops, regcache, |
| 1358 | gdbarch_ps_regnum (gdbarch)); |
| 1359 | th->context.EFlags |= FLAG_TRACE_BIT; |
| 1360 | } |
| 1361 | |
| 1362 | if (th->context.ContextFlags) |
| 1363 | { |
| 1364 | if (debug_registers_changed) |
| 1365 | { |
| 1366 | th->context.Dr0 = dr[0]; |
| 1367 | th->context.Dr1 = dr[1]; |
| 1368 | th->context.Dr2 = dr[2]; |
| 1369 | th->context.Dr3 = dr[3]; |
| 1370 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 1371 | th->context.Dr7 = dr[7]; |
| 1372 | } |
| 1373 | CHECK (SetThreadContext (th->h, &th->context)); |
| 1374 | th->context.ContextFlags = 0; |
| 1375 | } |
| 1376 | } |
| 1377 | |
| 1378 | /* Allow continuing with the same signal that interrupted us. |
| 1379 | Otherwise complain. */ |
| 1380 | |
| 1381 | if (resume_all) |
| 1382 | windows_continue (continue_status, -1, 0); |
| 1383 | else |
| 1384 | windows_continue (continue_status, ptid_get_tid (ptid), 0); |
| 1385 | } |
| 1386 | |
| 1387 | /* Ctrl-C handler used when the inferior is not run in the same console. The |
| 1388 | handler is in charge of interrupting the inferior using DebugBreakProcess. |
| 1389 | Note that this function is not available prior to Windows XP. In this case |
| 1390 | we emit a warning. */ |
| 1391 | static BOOL WINAPI |
| 1392 | ctrl_c_handler (DWORD event_type) |
| 1393 | { |
| 1394 | const int attach_flag = current_inferior ()->attach_flag; |
| 1395 | |
| 1396 | /* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */ |
| 1397 | if (event_type != CTRL_C_EVENT && event_type != CTRL_BREAK_EVENT) |
| 1398 | return FALSE; |
| 1399 | |
| 1400 | /* If the inferior and the debugger share the same console, do nothing as |
| 1401 | the inferior has also received the Ctrl-C event. */ |
| 1402 | if (!new_console && !attach_flag) |
| 1403 | return TRUE; |
| 1404 | |
| 1405 | if (!DebugBreakProcess (current_process_handle)) |
| 1406 | warning (_("Could not interrupt program. " |
| 1407 | "Press Ctrl-c in the program console.")); |
| 1408 | |
| 1409 | /* Return true to tell that Ctrl-C has been handled. */ |
| 1410 | return TRUE; |
| 1411 | } |
| 1412 | |
| 1413 | /* Get the next event from the child. Returns a non-zero thread id if the event |
| 1414 | requires handling by WFI (or whatever). */ |
| 1415 | static int |
| 1416 | get_windows_debug_event (struct target_ops *ops, |
| 1417 | int pid, struct target_waitstatus *ourstatus) |
| 1418 | { |
| 1419 | BOOL debug_event; |
| 1420 | DWORD continue_status, event_code; |
| 1421 | windows_thread_info *th; |
| 1422 | static windows_thread_info dummy_thread_info; |
| 1423 | DWORD thread_id = 0; |
| 1424 | |
| 1425 | last_sig = GDB_SIGNAL_0; |
| 1426 | |
| 1427 | if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) |
| 1428 | goto out; |
| 1429 | |
| 1430 | event_count++; |
| 1431 | continue_status = DBG_CONTINUE; |
| 1432 | |
| 1433 | event_code = current_event.dwDebugEventCode; |
| 1434 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| 1435 | th = NULL; |
| 1436 | have_saved_context = 0; |
| 1437 | |
| 1438 | switch (event_code) |
| 1439 | { |
| 1440 | case CREATE_THREAD_DEBUG_EVENT: |
| 1441 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1442 | (unsigned) current_event.dwProcessId, |
| 1443 | (unsigned) current_event.dwThreadId, |
| 1444 | "CREATE_THREAD_DEBUG_EVENT")); |
| 1445 | if (saw_create != 1) |
| 1446 | { |
| 1447 | struct inferior *inf; |
| 1448 | inf = find_inferior_pid (current_event.dwProcessId); |
| 1449 | if (!saw_create && inf->attach_flag) |
| 1450 | { |
| 1451 | /* Kludge around a Windows bug where first event is a create |
| 1452 | thread event. Caused when attached process does not have |
| 1453 | a main thread. */ |
| 1454 | thread_id = fake_create_process (); |
| 1455 | if (thread_id) |
| 1456 | saw_create++; |
| 1457 | } |
| 1458 | break; |
| 1459 | } |
| 1460 | /* Record the existence of this thread. */ |
| 1461 | thread_id = current_event.dwThreadId; |
| 1462 | th = windows_add_thread (ptid_build (current_event.dwProcessId, 0, |
| 1463 | current_event.dwThreadId), |
| 1464 | current_event.u.CreateThread.hThread, |
| 1465 | current_event.u.CreateThread.lpThreadLocalBase); |
| 1466 | |
| 1467 | break; |
| 1468 | |
| 1469 | case EXIT_THREAD_DEBUG_EVENT: |
| 1470 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1471 | (unsigned) current_event.dwProcessId, |
| 1472 | (unsigned) current_event.dwThreadId, |
| 1473 | "EXIT_THREAD_DEBUG_EVENT")); |
| 1474 | |
| 1475 | if (current_event.dwThreadId != main_thread_id) |
| 1476 | { |
| 1477 | windows_delete_thread (ptid_build (current_event.dwProcessId, 0, |
| 1478 | current_event.dwThreadId), |
| 1479 | current_event.u.ExitThread.dwExitCode); |
| 1480 | th = &dummy_thread_info; |
| 1481 | } |
| 1482 | break; |
| 1483 | |
| 1484 | case CREATE_PROCESS_DEBUG_EVENT: |
| 1485 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1486 | (unsigned) current_event.dwProcessId, |
| 1487 | (unsigned) current_event.dwThreadId, |
| 1488 | "CREATE_PROCESS_DEBUG_EVENT")); |
| 1489 | CloseHandle (current_event.u.CreateProcessInfo.hFile); |
| 1490 | if (++saw_create != 1) |
| 1491 | break; |
| 1492 | |
| 1493 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; |
| 1494 | if (main_thread_id) |
| 1495 | windows_delete_thread (ptid_build (current_event.dwProcessId, 0, |
| 1496 | main_thread_id), |
| 1497 | 0); |
| 1498 | main_thread_id = current_event.dwThreadId; |
| 1499 | /* Add the main thread. */ |
| 1500 | th = windows_add_thread (ptid_build (current_event.dwProcessId, 0, |
| 1501 | current_event.dwThreadId), |
| 1502 | current_event.u.CreateProcessInfo.hThread, |
| 1503 | current_event.u.CreateProcessInfo.lpThreadLocalBase); |
| 1504 | thread_id = current_event.dwThreadId; |
| 1505 | break; |
| 1506 | |
| 1507 | case EXIT_PROCESS_DEBUG_EVENT: |
| 1508 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1509 | (unsigned) current_event.dwProcessId, |
| 1510 | (unsigned) current_event.dwThreadId, |
| 1511 | "EXIT_PROCESS_DEBUG_EVENT")); |
| 1512 | if (!windows_initialization_done) |
| 1513 | { |
| 1514 | target_terminal_ours (); |
| 1515 | target_mourn_inferior (inferior_ptid); |
| 1516 | error (_("During startup program exited with code 0x%x."), |
| 1517 | (unsigned int) current_event.u.ExitProcess.dwExitCode); |
| 1518 | } |
| 1519 | else if (saw_create == 1) |
| 1520 | { |
| 1521 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 1522 | ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode; |
| 1523 | thread_id = main_thread_id; |
| 1524 | } |
| 1525 | break; |
| 1526 | |
| 1527 | case LOAD_DLL_DEBUG_EVENT: |
| 1528 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1529 | (unsigned) current_event.dwProcessId, |
| 1530 | (unsigned) current_event.dwThreadId, |
| 1531 | "LOAD_DLL_DEBUG_EVENT")); |
| 1532 | CloseHandle (current_event.u.LoadDll.hFile); |
| 1533 | if (saw_create != 1 || ! windows_initialization_done) |
| 1534 | break; |
| 1535 | catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL); |
| 1536 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1537 | ourstatus->value.integer = 0; |
| 1538 | thread_id = main_thread_id; |
| 1539 | break; |
| 1540 | |
| 1541 | case UNLOAD_DLL_DEBUG_EVENT: |
| 1542 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1543 | (unsigned) current_event.dwProcessId, |
| 1544 | (unsigned) current_event.dwThreadId, |
| 1545 | "UNLOAD_DLL_DEBUG_EVENT")); |
| 1546 | if (saw_create != 1 || ! windows_initialization_done) |
| 1547 | break; |
| 1548 | catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL); |
| 1549 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1550 | ourstatus->value.integer = 0; |
| 1551 | thread_id = main_thread_id; |
| 1552 | break; |
| 1553 | |
| 1554 | case EXCEPTION_DEBUG_EVENT: |
| 1555 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1556 | (unsigned) current_event.dwProcessId, |
| 1557 | (unsigned) current_event.dwThreadId, |
| 1558 | "EXCEPTION_DEBUG_EVENT")); |
| 1559 | if (saw_create != 1) |
| 1560 | break; |
| 1561 | switch (handle_exception (ourstatus)) |
| 1562 | { |
| 1563 | case HANDLE_EXCEPTION_UNHANDLED: |
| 1564 | default: |
| 1565 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1566 | break; |
| 1567 | case HANDLE_EXCEPTION_HANDLED: |
| 1568 | thread_id = current_event.dwThreadId; |
| 1569 | break; |
| 1570 | case HANDLE_EXCEPTION_IGNORED: |
| 1571 | continue_status = DBG_CONTINUE; |
| 1572 | break; |
| 1573 | } |
| 1574 | break; |
| 1575 | |
| 1576 | case OUTPUT_DEBUG_STRING_EVENT: /* Message from the kernel. */ |
| 1577 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1578 | (unsigned) current_event.dwProcessId, |
| 1579 | (unsigned) current_event.dwThreadId, |
| 1580 | "OUTPUT_DEBUG_STRING_EVENT")); |
| 1581 | if (saw_create != 1) |
| 1582 | break; |
| 1583 | thread_id = handle_output_debug_string (ourstatus); |
| 1584 | break; |
| 1585 | |
| 1586 | default: |
| 1587 | if (saw_create != 1) |
| 1588 | break; |
| 1589 | printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n", |
| 1590 | (unsigned) current_event.dwProcessId, |
| 1591 | (unsigned) current_event.dwThreadId); |
| 1592 | printf_unfiltered (" unknown event code %u\n", |
| 1593 | (unsigned) current_event.dwDebugEventCode); |
| 1594 | break; |
| 1595 | } |
| 1596 | |
| 1597 | if (!thread_id || saw_create != 1) |
| 1598 | { |
| 1599 | CHECK (windows_continue (continue_status, -1, 0)); |
| 1600 | } |
| 1601 | else |
| 1602 | { |
| 1603 | inferior_ptid = ptid_build (current_event.dwProcessId, 0, |
| 1604 | thread_id); |
| 1605 | current_thread = th; |
| 1606 | if (!current_thread) |
| 1607 | current_thread = thread_rec (thread_id, TRUE); |
| 1608 | } |
| 1609 | |
| 1610 | out: |
| 1611 | return thread_id; |
| 1612 | } |
| 1613 | |
| 1614 | /* Wait for interesting events to occur in the target process. */ |
| 1615 | static ptid_t |
| 1616 | windows_wait (struct target_ops *ops, |
| 1617 | ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
| 1618 | { |
| 1619 | int pid = -1; |
| 1620 | |
| 1621 | target_terminal_ours (); |
| 1622 | |
| 1623 | /* We loop when we get a non-standard exception rather than return |
| 1624 | with a SPURIOUS because resume can try and step or modify things, |
| 1625 | which needs a current_thread->h. But some of these exceptions mark |
| 1626 | the birth or death of threads, which mean that the current thread |
| 1627 | isn't necessarily what you think it is. */ |
| 1628 | |
| 1629 | while (1) |
| 1630 | { |
| 1631 | int retval; |
| 1632 | |
| 1633 | /* If the user presses Ctrl-c while the debugger is waiting |
| 1634 | for an event, he expects the debugger to interrupt his program |
| 1635 | and to get the prompt back. There are two possible situations: |
| 1636 | |
| 1637 | - The debugger and the program do not share the console, in |
| 1638 | which case the Ctrl-c event only reached the debugger. |
| 1639 | In that case, the ctrl_c handler will take care of interrupting |
| 1640 | the inferior. Note that this case is working starting with |
| 1641 | Windows XP. For Windows 2000, Ctrl-C should be pressed in the |
| 1642 | inferior console. |
| 1643 | |
| 1644 | - The debugger and the program share the same console, in which |
| 1645 | case both debugger and inferior will receive the Ctrl-c event. |
| 1646 | In that case the ctrl_c handler will ignore the event, as the |
| 1647 | Ctrl-c event generated inside the inferior will trigger the |
| 1648 | expected debug event. |
| 1649 | |
| 1650 | FIXME: brobecker/2008-05-20: If the inferior receives the |
| 1651 | signal first and the delay until GDB receives that signal |
| 1652 | is sufficiently long, GDB can sometimes receive the SIGINT |
| 1653 | after we have unblocked the CTRL+C handler. This would |
| 1654 | lead to the debugger stopping prematurely while handling |
| 1655 | the new-thread event that comes with the handling of the SIGINT |
| 1656 | inside the inferior, and then stop again immediately when |
| 1657 | the user tries to resume the execution in the inferior. |
| 1658 | This is a classic race that we should try to fix one day. */ |
| 1659 | SetConsoleCtrlHandler (&ctrl_c_handler, TRUE); |
| 1660 | retval = get_windows_debug_event (ops, pid, ourstatus); |
| 1661 | SetConsoleCtrlHandler (&ctrl_c_handler, FALSE); |
| 1662 | |
| 1663 | if (retval) |
| 1664 | return ptid_build (current_event.dwProcessId, 0, retval); |
| 1665 | else |
| 1666 | { |
| 1667 | int detach = 0; |
| 1668 | |
| 1669 | if (deprecated_ui_loop_hook != NULL) |
| 1670 | detach = deprecated_ui_loop_hook (0); |
| 1671 | |
| 1672 | if (detach) |
| 1673 | windows_kill_inferior (ops); |
| 1674 | } |
| 1675 | } |
| 1676 | } |
| 1677 | |
| 1678 | /* Iterate over all DLLs currently mapped by our inferior, and |
| 1679 | add them to our list of solibs. */ |
| 1680 | |
| 1681 | static void |
| 1682 | windows_add_all_dlls (void) |
| 1683 | { |
| 1684 | struct so_list *so; |
| 1685 | HMODULE dummy_hmodule; |
| 1686 | DWORD cb_needed; |
| 1687 | HMODULE *hmodules; |
| 1688 | int i; |
| 1689 | |
| 1690 | if (EnumProcessModules (current_process_handle, &dummy_hmodule, |
| 1691 | sizeof (HMODULE), &cb_needed) == 0) |
| 1692 | return; |
| 1693 | |
| 1694 | if (cb_needed < 1) |
| 1695 | return; |
| 1696 | |
| 1697 | hmodules = (HMODULE *) alloca (cb_needed); |
| 1698 | if (EnumProcessModules (current_process_handle, hmodules, |
| 1699 | cb_needed, &cb_needed) == 0) |
| 1700 | return; |
| 1701 | |
| 1702 | for (i = 1; i < (int) (cb_needed / sizeof (HMODULE)); i++) |
| 1703 | { |
| 1704 | MODULEINFO mi; |
| 1705 | #ifdef __USEWIDE |
| 1706 | wchar_t dll_name[__PMAX]; |
| 1707 | char name[__PMAX]; |
| 1708 | #else |
| 1709 | char dll_name[__PMAX]; |
| 1710 | char *name; |
| 1711 | #endif |
| 1712 | if (GetModuleInformation (current_process_handle, hmodules[i], |
| 1713 | &mi, sizeof (mi)) == 0) |
| 1714 | continue; |
| 1715 | if (GetModuleFileNameEx (current_process_handle, hmodules[i], |
| 1716 | dll_name, sizeof (dll_name)) == 0) |
| 1717 | continue; |
| 1718 | #ifdef __USEWIDE |
| 1719 | wcstombs (name, dll_name, __PMAX); |
| 1720 | #else |
| 1721 | name = dll_name; |
| 1722 | #endif |
| 1723 | |
| 1724 | solib_end->next = windows_make_so (name, mi.lpBaseOfDll); |
| 1725 | solib_end = solib_end->next; |
| 1726 | } |
| 1727 | } |
| 1728 | |
| 1729 | static void |
| 1730 | do_initial_windows_stuff (struct target_ops *ops, DWORD pid, int attaching) |
| 1731 | { |
| 1732 | int i; |
| 1733 | struct inferior *inf; |
| 1734 | struct thread_info *tp; |
| 1735 | |
| 1736 | last_sig = GDB_SIGNAL_0; |
| 1737 | event_count = 0; |
| 1738 | exception_count = 0; |
| 1739 | open_process_used = 0; |
| 1740 | debug_registers_changed = 0; |
| 1741 | debug_registers_used = 0; |
| 1742 | for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++) |
| 1743 | dr[i] = 0; |
| 1744 | #ifdef __CYGWIN__ |
| 1745 | cygwin_load_start = cygwin_load_end = 0; |
| 1746 | #endif |
| 1747 | current_event.dwProcessId = pid; |
| 1748 | memset (¤t_event, 0, sizeof (current_event)); |
| 1749 | if (!target_is_pushed (ops)) |
| 1750 | push_target (ops); |
| 1751 | disable_breakpoints_in_shlibs (); |
| 1752 | windows_clear_solib (); |
| 1753 | clear_proceed_status (0); |
| 1754 | init_wait_for_inferior (); |
| 1755 | |
| 1756 | inf = current_inferior (); |
| 1757 | inferior_appeared (inf, pid); |
| 1758 | inf->attach_flag = attaching; |
| 1759 | |
| 1760 | /* Make the new process the current inferior, so terminal handling |
| 1761 | can rely on it. When attaching, we don't know about any thread |
| 1762 | id here, but that's OK --- nothing should be referencing the |
| 1763 | current thread until we report an event out of windows_wait. */ |
| 1764 | inferior_ptid = pid_to_ptid (pid); |
| 1765 | |
| 1766 | target_terminal_init (); |
| 1767 | target_terminal_inferior (); |
| 1768 | |
| 1769 | windows_initialization_done = 0; |
| 1770 | |
| 1771 | while (1) |
| 1772 | { |
| 1773 | struct target_waitstatus status; |
| 1774 | |
| 1775 | windows_wait (ops, minus_one_ptid, &status, 0); |
| 1776 | |
| 1777 | /* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread |
| 1778 | events. */ |
| 1779 | if (status.kind != TARGET_WAITKIND_LOADED |
| 1780 | && status.kind != TARGET_WAITKIND_SPURIOUS) |
| 1781 | break; |
| 1782 | |
| 1783 | windows_resume (ops, minus_one_ptid, 0, GDB_SIGNAL_0); |
| 1784 | } |
| 1785 | |
| 1786 | /* Now that the inferior has been started and all DLLs have been mapped, |
| 1787 | we can iterate over all DLLs and load them in. |
| 1788 | |
| 1789 | We avoid doing it any earlier because, on certain versions of Windows, |
| 1790 | LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular, |
| 1791 | we have seen on Windows 8.1 that the ntdll.dll load event does not |
| 1792 | include the DLL name, preventing us from creating an associated SO. |
| 1793 | A possible explanation is that ntdll.dll might be mapped before |
| 1794 | the SO info gets created by the Windows system -- ntdll.dll is |
| 1795 | the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs |
| 1796 | do not seem to suffer from that problem. |
| 1797 | |
| 1798 | Rather than try to work around this sort of issue, it is much |
| 1799 | simpler to just ignore DLL load/unload events during the startup |
| 1800 | phase, and then process them all in one batch now. */ |
| 1801 | windows_add_all_dlls (); |
| 1802 | |
| 1803 | windows_initialization_done = 1; |
| 1804 | return; |
| 1805 | } |
| 1806 | |
| 1807 | /* Try to set or remove a user privilege to the current process. Return -1 |
| 1808 | if that fails, the previous setting of that privilege otherwise. |
| 1809 | |
| 1810 | This code is copied from the Cygwin source code and rearranged to allow |
| 1811 | dynamically loading of the needed symbols from advapi32 which is only |
| 1812 | available on NT/2K/XP. */ |
| 1813 | static int |
| 1814 | set_process_privilege (const char *privilege, BOOL enable) |
| 1815 | { |
| 1816 | HANDLE token_hdl = NULL; |
| 1817 | LUID restore_priv; |
| 1818 | TOKEN_PRIVILEGES new_priv, orig_priv; |
| 1819 | int ret = -1; |
| 1820 | DWORD size; |
| 1821 | |
| 1822 | if (!OpenProcessToken (GetCurrentProcess (), |
| 1823 | TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, |
| 1824 | &token_hdl)) |
| 1825 | goto out; |
| 1826 | |
| 1827 | if (!LookupPrivilegeValueA (NULL, privilege, &restore_priv)) |
| 1828 | goto out; |
| 1829 | |
| 1830 | new_priv.PrivilegeCount = 1; |
| 1831 | new_priv.Privileges[0].Luid = restore_priv; |
| 1832 | new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0; |
| 1833 | |
| 1834 | if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv, |
| 1835 | sizeof orig_priv, &orig_priv, &size)) |
| 1836 | goto out; |
| 1837 | #if 0 |
| 1838 | /* Disabled, otherwise every `attach' in an unprivileged user session |
| 1839 | would raise the "Failed to get SE_DEBUG_NAME privilege" warning in |
| 1840 | windows_attach(). */ |
| 1841 | /* AdjustTokenPrivileges returns TRUE even if the privilege could not |
| 1842 | be enabled. GetLastError () returns an correct error code, though. */ |
| 1843 | if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED) |
| 1844 | goto out; |
| 1845 | #endif |
| 1846 | |
| 1847 | ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0; |
| 1848 | |
| 1849 | out: |
| 1850 | if (token_hdl) |
| 1851 | CloseHandle (token_hdl); |
| 1852 | |
| 1853 | return ret; |
| 1854 | } |
| 1855 | |
| 1856 | /* Attach to process PID, then initialize for debugging it. */ |
| 1857 | static void |
| 1858 | windows_attach (struct target_ops *ops, const char *args, int from_tty) |
| 1859 | { |
| 1860 | BOOL ok; |
| 1861 | DWORD pid; |
| 1862 | |
| 1863 | pid = parse_pid_to_attach (args); |
| 1864 | |
| 1865 | if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0) |
| 1866 | { |
| 1867 | printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n"); |
| 1868 | printf_unfiltered ("This can cause attach to " |
| 1869 | "fail on Windows NT/2K/XP\n"); |
| 1870 | } |
| 1871 | |
| 1872 | windows_init_thread_list (); |
| 1873 | ok = DebugActiveProcess (pid); |
| 1874 | saw_create = 0; |
| 1875 | |
| 1876 | #ifdef __CYGWIN__ |
| 1877 | if (!ok) |
| 1878 | { |
| 1879 | /* Try fall back to Cygwin pid. */ |
| 1880 | pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid); |
| 1881 | |
| 1882 | if (pid > 0) |
| 1883 | ok = DebugActiveProcess (pid); |
| 1884 | } |
| 1885 | #endif |
| 1886 | |
| 1887 | if (!ok) |
| 1888 | error (_("Can't attach to process.")); |
| 1889 | |
| 1890 | DebugSetProcessKillOnExit (FALSE); |
| 1891 | |
| 1892 | if (from_tty) |
| 1893 | { |
| 1894 | char *exec_file = (char *) get_exec_file (0); |
| 1895 | |
| 1896 | if (exec_file) |
| 1897 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, |
| 1898 | target_pid_to_str (pid_to_ptid (pid))); |
| 1899 | else |
| 1900 | printf_unfiltered ("Attaching to %s\n", |
| 1901 | target_pid_to_str (pid_to_ptid (pid))); |
| 1902 | |
| 1903 | gdb_flush (gdb_stdout); |
| 1904 | } |
| 1905 | |
| 1906 | do_initial_windows_stuff (ops, pid, 1); |
| 1907 | target_terminal_ours (); |
| 1908 | } |
| 1909 | |
| 1910 | static void |
| 1911 | windows_detach (struct target_ops *ops, const char *args, int from_tty) |
| 1912 | { |
| 1913 | int detached = 1; |
| 1914 | |
| 1915 | ptid_t ptid = minus_one_ptid; |
| 1916 | windows_resume (ops, ptid, 0, GDB_SIGNAL_0); |
| 1917 | |
| 1918 | if (!DebugActiveProcessStop (current_event.dwProcessId)) |
| 1919 | { |
| 1920 | error (_("Can't detach process %u (error %u)"), |
| 1921 | (unsigned) current_event.dwProcessId, (unsigned) GetLastError ()); |
| 1922 | detached = 0; |
| 1923 | } |
| 1924 | DebugSetProcessKillOnExit (FALSE); |
| 1925 | |
| 1926 | if (detached && from_tty) |
| 1927 | { |
| 1928 | const char *exec_file = get_exec_file (0); |
| 1929 | if (exec_file == 0) |
| 1930 | exec_file = ""; |
| 1931 | printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file, |
| 1932 | (unsigned) current_event.dwProcessId); |
| 1933 | gdb_flush (gdb_stdout); |
| 1934 | } |
| 1935 | |
| 1936 | x86_cleanup_dregs (); |
| 1937 | inferior_ptid = null_ptid; |
| 1938 | detach_inferior (current_event.dwProcessId); |
| 1939 | |
| 1940 | inf_child_maybe_unpush_target (ops); |
| 1941 | } |
| 1942 | |
| 1943 | /* Try to determine the executable filename. |
| 1944 | |
| 1945 | EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN. |
| 1946 | |
| 1947 | Upon success, the filename is stored inside EXE_NAME_RET, and |
| 1948 | this function returns nonzero. |
| 1949 | |
| 1950 | Otherwise, this function returns zero and the contents of |
| 1951 | EXE_NAME_RET is undefined. */ |
| 1952 | |
| 1953 | static int |
| 1954 | windows_get_exec_module_filename (char *exe_name_ret, size_t exe_name_max_len) |
| 1955 | { |
| 1956 | DWORD len; |
| 1957 | HMODULE dh_buf; |
| 1958 | DWORD cbNeeded; |
| 1959 | |
| 1960 | cbNeeded = 0; |
| 1961 | if (!EnumProcessModules (current_process_handle, &dh_buf, |
| 1962 | sizeof (HMODULE), &cbNeeded) || !cbNeeded) |
| 1963 | return 0; |
| 1964 | |
| 1965 | /* We know the executable is always first in the list of modules, |
| 1966 | which we just fetched. So no need to fetch more. */ |
| 1967 | |
| 1968 | #ifdef __CYGWIN__ |
| 1969 | { |
| 1970 | /* Cygwin prefers that the path be in /x/y/z format, so extract |
| 1971 | the filename into a temporary buffer first, and then convert it |
| 1972 | to POSIX format into the destination buffer. */ |
| 1973 | cygwin_buf_t *pathbuf = (cygwin_buf_t *) alloca (exe_name_max_len * sizeof (cygwin_buf_t)); |
| 1974 | |
| 1975 | len = GetModuleFileNameEx (current_process_handle, |
| 1976 | dh_buf, pathbuf, exe_name_max_len); |
| 1977 | if (len == 0) |
| 1978 | error (_("Error getting executable filename: %u."), |
| 1979 | (unsigned) GetLastError ()); |
| 1980 | if (cygwin_conv_path (CCP_WIN_W_TO_POSIX, pathbuf, exe_name_ret, |
| 1981 | exe_name_max_len) < 0) |
| 1982 | error (_("Error converting executable filename to POSIX: %d."), errno); |
| 1983 | } |
| 1984 | #else |
| 1985 | len = GetModuleFileNameEx (current_process_handle, |
| 1986 | dh_buf, exe_name_ret, exe_name_max_len); |
| 1987 | if (len == 0) |
| 1988 | error (_("Error getting executable filename: %u."), |
| 1989 | (unsigned) GetLastError ()); |
| 1990 | #endif |
| 1991 | |
| 1992 | return 1; /* success */ |
| 1993 | } |
| 1994 | |
| 1995 | /* The pid_to_exec_file target_ops method for this platform. */ |
| 1996 | |
| 1997 | static char * |
| 1998 | windows_pid_to_exec_file (struct target_ops *self, int pid) |
| 1999 | { |
| 2000 | static char path[__PMAX]; |
| 2001 | #ifdef __CYGWIN__ |
| 2002 | /* Try to find exe name as symlink target of /proc/<pid>/exe. */ |
| 2003 | int nchars; |
| 2004 | char procexe[sizeof ("/proc/4294967295/exe")]; |
| 2005 | |
| 2006 | xsnprintf (procexe, sizeof (procexe), "/proc/%u/exe", pid); |
| 2007 | nchars = readlink (procexe, path, sizeof(path)); |
| 2008 | if (nchars > 0 && nchars < sizeof (path)) |
| 2009 | { |
| 2010 | path[nchars] = '\0'; /* Got it */ |
| 2011 | return path; |
| 2012 | } |
| 2013 | #endif |
| 2014 | |
| 2015 | /* If we get here then either Cygwin is hosed, this isn't a Cygwin version |
| 2016 | of gdb, or we're trying to debug a non-Cygwin windows executable. */ |
| 2017 | if (!windows_get_exec_module_filename (path, sizeof (path))) |
| 2018 | path[0] = '\0'; |
| 2019 | |
| 2020 | return path; |
| 2021 | } |
| 2022 | |
| 2023 | /* Print status information about what we're accessing. */ |
| 2024 | |
| 2025 | static void |
| 2026 | windows_files_info (struct target_ops *ignore) |
| 2027 | { |
| 2028 | struct inferior *inf = current_inferior (); |
| 2029 | |
| 2030 | printf_unfiltered ("\tUsing the running image of %s %s.\n", |
| 2031 | inf->attach_flag ? "attached" : "child", |
| 2032 | target_pid_to_str (inferior_ptid)); |
| 2033 | } |
| 2034 | |
| 2035 | /* Modify CreateProcess parameters for use of a new separate console. |
| 2036 | Parameters are: |
| 2037 | *FLAGS: DWORD parameter for general process creation flags. |
| 2038 | *SI: STARTUPINFO structure, for which the console window size and |
| 2039 | console buffer size is filled in if GDB is running in a console. |
| 2040 | to create the new console. |
| 2041 | The size of the used font is not available on all versions of |
| 2042 | Windows OS. Furthermore, the current font might not be the default |
| 2043 | font, but this is still better than before. |
| 2044 | If the windows and buffer sizes are computed, |
| 2045 | SI->DWFLAGS is changed so that this information is used |
| 2046 | by CreateProcess function. */ |
| 2047 | |
| 2048 | static void |
| 2049 | windows_set_console_info (STARTUPINFO *si, DWORD *flags) |
| 2050 | { |
| 2051 | HANDLE hconsole = CreateFile ("CONOUT$", GENERIC_READ | GENERIC_WRITE, |
| 2052 | FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0); |
| 2053 | |
| 2054 | if (hconsole != INVALID_HANDLE_VALUE) |
| 2055 | { |
| 2056 | CONSOLE_SCREEN_BUFFER_INFO sbinfo; |
| 2057 | COORD font_size; |
| 2058 | CONSOLE_FONT_INFO cfi; |
| 2059 | |
| 2060 | GetCurrentConsoleFont (hconsole, FALSE, &cfi); |
| 2061 | font_size = GetConsoleFontSize (hconsole, cfi.nFont); |
| 2062 | GetConsoleScreenBufferInfo(hconsole, &sbinfo); |
| 2063 | si->dwXSize = sbinfo.srWindow.Right - sbinfo.srWindow.Left + 1; |
| 2064 | si->dwYSize = sbinfo.srWindow.Bottom - sbinfo.srWindow.Top + 1; |
| 2065 | if (font_size.X) |
| 2066 | si->dwXSize *= font_size.X; |
| 2067 | else |
| 2068 | si->dwXSize *= 8; |
| 2069 | if (font_size.Y) |
| 2070 | si->dwYSize *= font_size.Y; |
| 2071 | else |
| 2072 | si->dwYSize *= 12; |
| 2073 | si->dwXCountChars = sbinfo.dwSize.X; |
| 2074 | si->dwYCountChars = sbinfo.dwSize.Y; |
| 2075 | si->dwFlags |= STARTF_USESIZE | STARTF_USECOUNTCHARS; |
| 2076 | } |
| 2077 | *flags |= CREATE_NEW_CONSOLE; |
| 2078 | } |
| 2079 | |
| 2080 | #ifndef __CYGWIN__ |
| 2081 | /* Function called by qsort to sort environment strings. */ |
| 2082 | |
| 2083 | static int |
| 2084 | envvar_cmp (const void *a, const void *b) |
| 2085 | { |
| 2086 | const char **p = (const char **) a; |
| 2087 | const char **q = (const char **) b; |
| 2088 | return strcasecmp (*p, *q); |
| 2089 | } |
| 2090 | #endif |
| 2091 | |
| 2092 | #ifdef __CYGWIN__ |
| 2093 | static void |
| 2094 | clear_win32_environment (char **env) |
| 2095 | { |
| 2096 | int i; |
| 2097 | size_t len; |
| 2098 | wchar_t *copy = NULL, *equalpos; |
| 2099 | |
| 2100 | for (i = 0; env[i] && *env[i]; i++) |
| 2101 | { |
| 2102 | len = mbstowcs (NULL, env[i], 0) + 1; |
| 2103 | copy = (wchar_t *) xrealloc (copy, len * sizeof (wchar_t)); |
| 2104 | mbstowcs (copy, env[i], len); |
| 2105 | equalpos = wcschr (copy, L'='); |
| 2106 | if (equalpos) |
| 2107 | *equalpos = L'\0'; |
| 2108 | SetEnvironmentVariableW (copy, NULL); |
| 2109 | } |
| 2110 | xfree (copy); |
| 2111 | } |
| 2112 | #endif |
| 2113 | |
| 2114 | #ifndef __CYGWIN__ |
| 2115 | |
| 2116 | /* Redirection of inferior I/O streams for native MS-Windows programs. |
| 2117 | Unlike on Unix, where this is handled by invoking the inferior via |
| 2118 | the shell, on MS-Windows we need to emulate the cmd.exe shell. |
| 2119 | |
| 2120 | The official documentation of the cmd.exe redirection features is here: |
| 2121 | |
| 2122 | http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx |
| 2123 | |
| 2124 | (That page talks about Windows XP, but there's no newer |
| 2125 | documentation, so we assume later versions of cmd.exe didn't change |
| 2126 | anything.) |
| 2127 | |
| 2128 | Caveat: the documentation on that page seems to include a few lies. |
| 2129 | For example, it describes strange constructs 1<&2 and 2<&1, which |
| 2130 | seem to work only when 1>&2 resp. 2>&1 would make sense, and so I |
| 2131 | think the cmd.exe parser of the redirection symbols simply doesn't |
| 2132 | care about the < vs > distinction in these cases. Therefore, the |
| 2133 | supported features are explicitly documented below. |
| 2134 | |
| 2135 | The emulation below aims at supporting all the valid use cases |
| 2136 | supported by cmd.exe, which include: |
| 2137 | |
| 2138 | < FILE redirect standard input from FILE |
| 2139 | 0< FILE redirect standard input from FILE |
| 2140 | <&N redirect standard input from file descriptor N |
| 2141 | 0<&N redirect standard input from file descriptor N |
| 2142 | > FILE redirect standard output to FILE |
| 2143 | >> FILE append standard output to FILE |
| 2144 | 1>> FILE append standard output to FILE |
| 2145 | >&N redirect standard output to file descriptor N |
| 2146 | 1>&N redirect standard output to file descriptor N |
| 2147 | >>&N append standard output to file descriptor N |
| 2148 | 1>>&N append standard output to file descriptor N |
| 2149 | 2> FILE redirect standard error to FILE |
| 2150 | 2>> FILE append standard error to FILE |
| 2151 | 2>&N redirect standard error to file descriptor N |
| 2152 | 2>>&N append standard error to file descriptor N |
| 2153 | |
| 2154 | Note that using N > 2 in the above construct is supported, but |
| 2155 | requires that the corresponding file descriptor be open by some |
| 2156 | means elsewhere or outside GDB. Also note that using ">&0" or |
| 2157 | "<&2" will generally fail, because the file descriptor redirected |
| 2158 | from is normally open in an incompatible mode (e.g., FD 0 is open |
| 2159 | for reading only). IOW, use of such tricks is not recommended; |
| 2160 | you are on your own. |
| 2161 | |
| 2162 | We do NOT support redirection of file descriptors above 2, as in |
| 2163 | "3>SOME-FILE", because MinGW compiled programs don't (supporting |
| 2164 | that needs special handling in the startup code that MinGW |
| 2165 | doesn't have). Pipes are also not supported. |
| 2166 | |
| 2167 | As for invalid use cases, where the redirection contains some |
| 2168 | error, the emulation below will detect that and produce some |
| 2169 | error and/or failure. But the behavior in those cases is not |
| 2170 | bug-for-bug compatible with what cmd.exe does in those cases. |
| 2171 | That's because what cmd.exe does then is not well defined, and |
| 2172 | seems to be a side effect of the cmd.exe parsing of the command |
| 2173 | line more than anything else. For example, try redirecting to an |
| 2174 | invalid file name, as in "> foo:bar". |
| 2175 | |
| 2176 | There are also minor syntactic deviations from what cmd.exe does |
| 2177 | in some corner cases. For example, it doesn't support the likes |
| 2178 | of "> &foo" to mean redirect to file named literally "&foo"; we |
| 2179 | do support that here, because that, too, sounds like some issue |
| 2180 | with the cmd.exe parser. Another nicety is that we support |
| 2181 | redirection targets that use file names with forward slashes, |
| 2182 | something cmd.exe doesn't -- this comes in handy since GDB |
| 2183 | file-name completion can be used when typing the command line for |
| 2184 | the inferior. */ |
| 2185 | |
| 2186 | /* Support routines for redirecting standard handles of the inferior. */ |
| 2187 | |
| 2188 | /* Parse a single redirection spec, open/duplicate the specified |
| 2189 | file/fd, and assign the appropriate value to one of the 3 standard |
| 2190 | file descriptors. */ |
| 2191 | static int |
| 2192 | redir_open (const char *redir_string, int *inp, int *out, int *err) |
| 2193 | { |
| 2194 | int *fd, ref_fd = -2; |
| 2195 | int mode; |
| 2196 | const char *fname = redir_string + 1; |
| 2197 | int rc = *redir_string; |
| 2198 | |
| 2199 | switch (rc) |
| 2200 | { |
| 2201 | case '0': |
| 2202 | fname++; |
| 2203 | /* FALLTHROUGH */ |
| 2204 | case '<': |
| 2205 | fd = inp; |
| 2206 | mode = O_RDONLY; |
| 2207 | break; |
| 2208 | case '1': case '2': |
| 2209 | fname++; |
| 2210 | /* FALLTHROUGH */ |
| 2211 | case '>': |
| 2212 | fd = (rc == '2') ? err : out; |
| 2213 | mode = O_WRONLY | O_CREAT; |
| 2214 | if (*fname == '>') |
| 2215 | { |
| 2216 | fname++; |
| 2217 | mode |= O_APPEND; |
| 2218 | } |
| 2219 | else |
| 2220 | mode |= O_TRUNC; |
| 2221 | break; |
| 2222 | default: |
| 2223 | return -1; |
| 2224 | } |
| 2225 | |
| 2226 | if (*fname == '&' && '0' <= fname[1] && fname[1] <= '9') |
| 2227 | { |
| 2228 | /* A reference to a file descriptor. */ |
| 2229 | char *fdtail; |
| 2230 | ref_fd = (int) strtol (fname + 1, &fdtail, 10); |
| 2231 | if (fdtail > fname + 1 && *fdtail == '\0') |
| 2232 | { |
| 2233 | /* Don't allow redirection when open modes are incompatible. */ |
| 2234 | if ((ref_fd == 0 && (fd == out || fd == err)) |
| 2235 | || ((ref_fd == 1 || ref_fd == 2) && fd == inp)) |
| 2236 | { |
| 2237 | errno = EPERM; |
| 2238 | return -1; |
| 2239 | } |
| 2240 | if (ref_fd == 0) |
| 2241 | ref_fd = *inp; |
| 2242 | else if (ref_fd == 1) |
| 2243 | ref_fd = *out; |
| 2244 | else if (ref_fd == 2) |
| 2245 | ref_fd = *err; |
| 2246 | } |
| 2247 | else |
| 2248 | { |
| 2249 | errno = EBADF; |
| 2250 | return -1; |
| 2251 | } |
| 2252 | } |
| 2253 | else |
| 2254 | fname++; /* skip the separator space */ |
| 2255 | /* If the descriptor is already open, close it. This allows |
| 2256 | multiple specs of redirections for the same stream, which is |
| 2257 | somewhat nonsensical, but still valid and supported by cmd.exe. |
| 2258 | (But cmd.exe only opens a single file in this case, the one |
| 2259 | specified by the last redirection spec on the command line.) */ |
| 2260 | if (*fd >= 0) |
| 2261 | _close (*fd); |
| 2262 | if (ref_fd == -2) |
| 2263 | { |
| 2264 | *fd = _open (fname, mode, _S_IREAD | _S_IWRITE); |
| 2265 | if (*fd < 0) |
| 2266 | return -1; |
| 2267 | } |
| 2268 | else if (ref_fd == -1) |
| 2269 | *fd = -1; /* reset to default destination */ |
| 2270 | else |
| 2271 | { |
| 2272 | *fd = _dup (ref_fd); |
| 2273 | if (*fd < 0) |
| 2274 | return -1; |
| 2275 | } |
| 2276 | /* _open just sets a flag for O_APPEND, which won't be passed to the |
| 2277 | inferior, so we need to actually move the file pointer. */ |
| 2278 | if ((mode & O_APPEND) != 0) |
| 2279 | _lseek (*fd, 0L, SEEK_END); |
| 2280 | return 0; |
| 2281 | } |
| 2282 | |
| 2283 | /* Canonicalize a single redirection spec and set up the corresponding |
| 2284 | file descriptor as specified. */ |
| 2285 | static int |
| 2286 | redir_set_redirection (const char *s, int *inp, int *out, int *err) |
| 2287 | { |
| 2288 | char buf[__PMAX + 2 + 5]; /* extra space for quotes & redirection string */ |
| 2289 | char *d = buf; |
| 2290 | const char *start = s; |
| 2291 | int quote = 0; |
| 2292 | |
| 2293 | *d++ = *s++; /* copy the 1st character, < or > or a digit */ |
| 2294 | if ((*start == '>' || *start == '1' || *start == '2') |
| 2295 | && *s == '>') |
| 2296 | { |
| 2297 | *d++ = *s++; |
| 2298 | if (*s == '>' && *start != '>') |
| 2299 | *d++ = *s++; |
| 2300 | } |
| 2301 | else if (*start == '0' && *s == '<') |
| 2302 | *d++ = *s++; |
| 2303 | /* cmd.exe recognizes "&N" only immediately after the redirection symbol. */ |
| 2304 | if (*s != '&') |
| 2305 | { |
| 2306 | while (isspace (*s)) /* skip whitespace before file name */ |
| 2307 | s++; |
| 2308 | *d++ = ' '; /* separate file name with a single space */ |
| 2309 | } |
| 2310 | |
| 2311 | /* Copy the file name. */ |
| 2312 | while (*s) |
| 2313 | { |
| 2314 | /* Remove quoting characters from the file name in buf[]. */ |
| 2315 | if (*s == '"') /* could support '..' quoting here */ |
| 2316 | { |
| 2317 | if (!quote) |
| 2318 | quote = *s++; |
| 2319 | else if (*s == quote) |
| 2320 | { |
| 2321 | quote = 0; |
| 2322 | s++; |
| 2323 | } |
| 2324 | else |
| 2325 | *d++ = *s++; |
| 2326 | } |
| 2327 | else if (*s == '\\') |
| 2328 | { |
| 2329 | if (s[1] == '"') /* could support '..' here */ |
| 2330 | s++; |
| 2331 | *d++ = *s++; |
| 2332 | } |
| 2333 | else if (isspace (*s) && !quote) |
| 2334 | break; |
| 2335 | else |
| 2336 | *d++ = *s++; |
| 2337 | if (d - buf >= sizeof (buf) - 1) |
| 2338 | { |
| 2339 | errno = ENAMETOOLONG; |
| 2340 | return 0; |
| 2341 | } |
| 2342 | } |
| 2343 | *d = '\0'; |
| 2344 | |
| 2345 | /* Windows doesn't allow redirection characters in file names, so we |
| 2346 | can bail out early if they use them, or if there's no target file |
| 2347 | name after the redirection symbol. */ |
| 2348 | if (d[-1] == '>' || d[-1] == '<') |
| 2349 | { |
| 2350 | errno = ENOENT; |
| 2351 | return 0; |
| 2352 | } |
| 2353 | if (redir_open (buf, inp, out, err) == 0) |
| 2354 | return s - start; |
| 2355 | return 0; |
| 2356 | } |
| 2357 | |
| 2358 | /* Parse the command line for redirection specs and prepare the file |
| 2359 | descriptors for the 3 standard streams accordingly. */ |
| 2360 | static bool |
| 2361 | redirect_inferior_handles (const char *cmd_orig, char *cmd, |
| 2362 | int *inp, int *out, int *err) |
| 2363 | { |
| 2364 | const char *s = cmd_orig; |
| 2365 | char *d = cmd; |
| 2366 | int quote = 0; |
| 2367 | bool retval = false; |
| 2368 | |
| 2369 | while (isspace (*s)) |
| 2370 | *d++ = *s++; |
| 2371 | |
| 2372 | while (*s) |
| 2373 | { |
| 2374 | if (*s == '"') /* could also support '..' quoting here */ |
| 2375 | { |
| 2376 | if (!quote) |
| 2377 | quote = *s; |
| 2378 | else if (*s == quote) |
| 2379 | quote = 0; |
| 2380 | } |
| 2381 | else if (*s == '\\') |
| 2382 | { |
| 2383 | if (s[1] == '"') /* escaped quote char */ |
| 2384 | s++; |
| 2385 | } |
| 2386 | else if (!quote) |
| 2387 | { |
| 2388 | /* Process a single redirection candidate. */ |
| 2389 | if (*s == '<' || *s == '>' |
| 2390 | || ((*s == '1' || *s == '2') && s[1] == '>') |
| 2391 | || (*s == '0' && s[1] == '<')) |
| 2392 | { |
| 2393 | int skip = redir_set_redirection (s, inp, out, err); |
| 2394 | |
| 2395 | if (skip <= 0) |
| 2396 | return false; |
| 2397 | retval = true; |
| 2398 | s += skip; |
| 2399 | } |
| 2400 | } |
| 2401 | if (*s) |
| 2402 | *d++ = *s++; |
| 2403 | } |
| 2404 | *d = '\0'; |
| 2405 | return retval; |
| 2406 | } |
| 2407 | #endif /* !__CYGWIN__ */ |
| 2408 | |
| 2409 | /* Start an inferior windows child process and sets inferior_ptid to its pid. |
| 2410 | EXEC_FILE is the file to run. |
| 2411 | ALLARGS is a string containing the arguments to the program. |
| 2412 | ENV is the environment vector to pass. Errors reported with error(). */ |
| 2413 | |
| 2414 | static void |
| 2415 | windows_create_inferior (struct target_ops *ops, const char *exec_file, |
| 2416 | const std::string &origallargs, char **in_env, |
| 2417 | int from_tty) |
| 2418 | { |
| 2419 | STARTUPINFO si; |
| 2420 | #ifdef __CYGWIN__ |
| 2421 | cygwin_buf_t real_path[__PMAX]; |
| 2422 | cygwin_buf_t shell[__PMAX]; /* Path to shell */ |
| 2423 | const char *sh; |
| 2424 | cygwin_buf_t *toexec; |
| 2425 | cygwin_buf_t *cygallargs; |
| 2426 | cygwin_buf_t *args; |
| 2427 | char **old_env = NULL; |
| 2428 | PWCHAR w32_env; |
| 2429 | size_t len; |
| 2430 | int tty; |
| 2431 | int ostdin, ostdout, ostderr; |
| 2432 | #else /* !__CYGWIN__ */ |
| 2433 | char real_path[__PMAX]; |
| 2434 | char shell[__PMAX]; /* Path to shell */ |
| 2435 | const char *toexec; |
| 2436 | char *args, *allargs_copy; |
| 2437 | size_t args_len, allargs_len; |
| 2438 | int fd_inp = -1, fd_out = -1, fd_err = -1; |
| 2439 | HANDLE tty = INVALID_HANDLE_VALUE; |
| 2440 | HANDLE inf_stdin = INVALID_HANDLE_VALUE; |
| 2441 | HANDLE inf_stdout = INVALID_HANDLE_VALUE; |
| 2442 | HANDLE inf_stderr = INVALID_HANDLE_VALUE; |
| 2443 | bool redirected = false; |
| 2444 | char *w32env; |
| 2445 | char *temp; |
| 2446 | size_t envlen; |
| 2447 | int i; |
| 2448 | size_t envsize; |
| 2449 | char **env; |
| 2450 | #endif /* !__CYGWIN__ */ |
| 2451 | const char *allargs = origallargs.c_str (); |
| 2452 | PROCESS_INFORMATION pi; |
| 2453 | BOOL ret; |
| 2454 | DWORD flags = 0; |
| 2455 | const char *inferior_io_terminal = get_inferior_io_terminal (); |
| 2456 | |
| 2457 | if (!exec_file) |
| 2458 | error (_("No executable specified, use `target exec'.")); |
| 2459 | |
| 2460 | memset (&si, 0, sizeof (si)); |
| 2461 | si.cb = sizeof (si); |
| 2462 | |
| 2463 | if (new_group) |
| 2464 | flags |= CREATE_NEW_PROCESS_GROUP; |
| 2465 | |
| 2466 | if (new_console) |
| 2467 | windows_set_console_info (&si, &flags); |
| 2468 | |
| 2469 | #ifdef __CYGWIN__ |
| 2470 | if (!useshell) |
| 2471 | { |
| 2472 | flags |= DEBUG_ONLY_THIS_PROCESS; |
| 2473 | if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, exec_file, real_path, |
| 2474 | __PMAX * sizeof (cygwin_buf_t)) < 0) |
| 2475 | error (_("Error starting executable: %d"), errno); |
| 2476 | toexec = real_path; |
| 2477 | #ifdef __USEWIDE |
| 2478 | len = mbstowcs (NULL, allargs, 0) + 1; |
| 2479 | if (len == (size_t) -1) |
| 2480 | error (_("Error starting executable: %d"), errno); |
| 2481 | cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t)); |
| 2482 | mbstowcs (cygallargs, allargs, len); |
| 2483 | #else /* !__USEWIDE */ |
| 2484 | cygallargs = allargs; |
| 2485 | #endif |
| 2486 | } |
| 2487 | else |
| 2488 | { |
| 2489 | sh = getenv ("SHELL"); |
| 2490 | if (!sh) |
| 2491 | sh = "/bin/sh"; |
| 2492 | if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, sh, shell, __PMAX) < 0) |
| 2493 | error (_("Error starting executable via shell: %d"), errno); |
| 2494 | #ifdef __USEWIDE |
| 2495 | len = sizeof (L" -c 'exec '") + mbstowcs (NULL, exec_file, 0) |
| 2496 | + mbstowcs (NULL, allargs, 0) + 2; |
| 2497 | cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t)); |
| 2498 | swprintf (cygallargs, len, L" -c 'exec %s %s'", exec_file, allargs); |
| 2499 | #else /* !__USEWIDE */ |
| 2500 | len = (sizeof (" -c 'exec '") + strlen (exec_file) |
| 2501 | + strlen (allargs) + 2); |
| 2502 | cygallargs = (char *) alloca (len); |
| 2503 | xsnprintf (cygallargs, len, " -c 'exec %s %s'", exec_file, allargs); |
| 2504 | #endif /* __USEWIDE */ |
| 2505 | toexec = shell; |
| 2506 | flags |= DEBUG_PROCESS; |
| 2507 | } |
| 2508 | |
| 2509 | #ifdef __USEWIDE |
| 2510 | args = (cygwin_buf_t *) alloca ((wcslen (toexec) + wcslen (cygallargs) + 2) |
| 2511 | * sizeof (wchar_t)); |
| 2512 | wcscpy (args, toexec); |
| 2513 | wcscat (args, L" "); |
| 2514 | wcscat (args, cygallargs); |
| 2515 | #else /* !__USEWIDE */ |
| 2516 | args = (cygwin_buf_t *) alloca (strlen (toexec) + strlen (cygallargs) + 2); |
| 2517 | strcpy (args, toexec); |
| 2518 | strcat (args, " "); |
| 2519 | strcat (args, cygallargs); |
| 2520 | #endif /* !__USEWIDE */ |
| 2521 | |
| 2522 | #ifdef CW_CVT_ENV_TO_WINENV |
| 2523 | /* First try to create a direct Win32 copy of the POSIX environment. */ |
| 2524 | w32_env = (PWCHAR) cygwin_internal (CW_CVT_ENV_TO_WINENV, in_env); |
| 2525 | if (w32_env != (PWCHAR) -1) |
| 2526 | flags |= CREATE_UNICODE_ENVIRONMENT; |
| 2527 | else |
| 2528 | /* If that fails, fall back to old method tweaking GDB's environment. */ |
| 2529 | #endif /* CW_CVT_ENV_TO_WINENV */ |
| 2530 | { |
| 2531 | /* Reset all Win32 environment variables to avoid leftover on next run. */ |
| 2532 | clear_win32_environment (environ); |
| 2533 | /* Prepare the environment vars for CreateProcess. */ |
| 2534 | old_env = environ; |
| 2535 | environ = in_env; |
| 2536 | cygwin_internal (CW_SYNC_WINENV); |
| 2537 | w32_env = NULL; |
| 2538 | } |
| 2539 | |
| 2540 | if (!inferior_io_terminal) |
| 2541 | tty = ostdin = ostdout = ostderr = -1; |
| 2542 | else |
| 2543 | { |
| 2544 | tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY); |
| 2545 | if (tty < 0) |
| 2546 | { |
| 2547 | print_sys_errmsg (inferior_io_terminal, errno); |
| 2548 | ostdin = ostdout = ostderr = -1; |
| 2549 | } |
| 2550 | else |
| 2551 | { |
| 2552 | ostdin = dup (0); |
| 2553 | ostdout = dup (1); |
| 2554 | ostderr = dup (2); |
| 2555 | dup2 (tty, 0); |
| 2556 | dup2 (tty, 1); |
| 2557 | dup2 (tty, 2); |
| 2558 | } |
| 2559 | } |
| 2560 | |
| 2561 | windows_init_thread_list (); |
| 2562 | ret = CreateProcess (0, |
| 2563 | args, /* command line */ |
| 2564 | NULL, /* Security */ |
| 2565 | NULL, /* thread */ |
| 2566 | TRUE, /* inherit handles */ |
| 2567 | flags, /* start flags */ |
| 2568 | w32_env, /* environment */ |
| 2569 | NULL, /* current directory */ |
| 2570 | &si, |
| 2571 | &pi); |
| 2572 | if (w32_env) |
| 2573 | /* Just free the Win32 environment, if it could be created. */ |
| 2574 | free (w32_env); |
| 2575 | else |
| 2576 | { |
| 2577 | /* Reset all environment variables to avoid leftover on next run. */ |
| 2578 | clear_win32_environment (in_env); |
| 2579 | /* Restore normal GDB environment variables. */ |
| 2580 | environ = old_env; |
| 2581 | cygwin_internal (CW_SYNC_WINENV); |
| 2582 | } |
| 2583 | |
| 2584 | if (tty >= 0) |
| 2585 | { |
| 2586 | close (tty); |
| 2587 | dup2 (ostdin, 0); |
| 2588 | dup2 (ostdout, 1); |
| 2589 | dup2 (ostderr, 2); |
| 2590 | close (ostdin); |
| 2591 | close (ostdout); |
| 2592 | close (ostderr); |
| 2593 | } |
| 2594 | #else /* !__CYGWIN__ */ |
| 2595 | allargs_len = strlen (allargs); |
| 2596 | allargs_copy = strcpy ((char *) alloca (allargs_len + 1), allargs); |
| 2597 | if (strpbrk (allargs_copy, "<>") != NULL) |
| 2598 | { |
| 2599 | int e = errno; |
| 2600 | errno = 0; |
| 2601 | redirected = |
| 2602 | redirect_inferior_handles (allargs, allargs_copy, |
| 2603 | &fd_inp, &fd_out, &fd_err); |
| 2604 | if (errno) |
| 2605 | warning (_("Error in redirection: %s."), strerror (errno)); |
| 2606 | else |
| 2607 | errno = e; |
| 2608 | allargs_len = strlen (allargs_copy); |
| 2609 | } |
| 2610 | /* If not all the standard streams are redirected by the command |
| 2611 | line, use inferior_io_terminal for those which aren't. */ |
| 2612 | if (inferior_io_terminal |
| 2613 | && !(fd_inp >= 0 && fd_out >= 0 && fd_err >= 0)) |
| 2614 | { |
| 2615 | SECURITY_ATTRIBUTES sa; |
| 2616 | sa.nLength = sizeof(sa); |
| 2617 | sa.lpSecurityDescriptor = 0; |
| 2618 | sa.bInheritHandle = TRUE; |
| 2619 | tty = CreateFileA (inferior_io_terminal, GENERIC_READ | GENERIC_WRITE, |
| 2620 | 0, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); |
| 2621 | if (tty == INVALID_HANDLE_VALUE) |
| 2622 | warning (_("Warning: Failed to open TTY %s, error %#x."), |
| 2623 | inferior_io_terminal, (unsigned) GetLastError ()); |
| 2624 | } |
| 2625 | if (redirected || tty != INVALID_HANDLE_VALUE) |
| 2626 | { |
| 2627 | if (fd_inp >= 0) |
| 2628 | si.hStdInput = (HANDLE) _get_osfhandle (fd_inp); |
| 2629 | else if (tty != INVALID_HANDLE_VALUE) |
| 2630 | si.hStdInput = tty; |
| 2631 | else |
| 2632 | si.hStdInput = GetStdHandle (STD_INPUT_HANDLE); |
| 2633 | if (fd_out >= 0) |
| 2634 | si.hStdOutput = (HANDLE) _get_osfhandle (fd_out); |
| 2635 | else if (tty != INVALID_HANDLE_VALUE) |
| 2636 | si.hStdOutput = tty; |
| 2637 | else |
| 2638 | si.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); |
| 2639 | if (fd_err >= 0) |
| 2640 | si.hStdError = (HANDLE) _get_osfhandle (fd_err); |
| 2641 | else if (tty != INVALID_HANDLE_VALUE) |
| 2642 | si.hStdError = tty; |
| 2643 | else |
| 2644 | si.hStdError = GetStdHandle (STD_ERROR_HANDLE); |
| 2645 | si.dwFlags |= STARTF_USESTDHANDLES; |
| 2646 | } |
| 2647 | |
| 2648 | toexec = exec_file; |
| 2649 | /* Build the command line, a space-separated list of tokens where |
| 2650 | the first token is the name of the module to be executed. |
| 2651 | To avoid ambiguities introduced by spaces in the module name, |
| 2652 | we quote it. */ |
| 2653 | args_len = strlen (toexec) + 2 /* quotes */ + allargs_len + 2; |
| 2654 | args = (char *) alloca (args_len); |
| 2655 | xsnprintf (args, args_len, "\"%s\" %s", toexec, allargs_copy); |
| 2656 | |
| 2657 | flags |= DEBUG_ONLY_THIS_PROCESS; |
| 2658 | |
| 2659 | /* CreateProcess takes the environment list as a null terminated set of |
| 2660 | strings (i.e. two nulls terminate the list). */ |
| 2661 | |
| 2662 | /* Get total size for env strings. */ |
| 2663 | for (envlen = 0, i = 0; in_env[i] && *in_env[i]; i++) |
| 2664 | envlen += strlen (in_env[i]) + 1; |
| 2665 | |
| 2666 | envsize = sizeof (in_env[0]) * (i + 1); |
| 2667 | env = (char **) alloca (envsize); |
| 2668 | memcpy (env, in_env, envsize); |
| 2669 | /* Windows programs expect the environment block to be sorted. */ |
| 2670 | qsort (env, i, sizeof (char *), envvar_cmp); |
| 2671 | |
| 2672 | w32env = (char *) alloca (envlen + 1); |
| 2673 | |
| 2674 | /* Copy env strings into new buffer. */ |
| 2675 | for (temp = w32env, i = 0; env[i] && *env[i]; i++) |
| 2676 | { |
| 2677 | strcpy (temp, env[i]); |
| 2678 | temp += strlen (temp) + 1; |
| 2679 | } |
| 2680 | |
| 2681 | /* Final nil string to terminate new env. */ |
| 2682 | *temp = 0; |
| 2683 | |
| 2684 | windows_init_thread_list (); |
| 2685 | ret = CreateProcessA (0, |
| 2686 | args, /* command line */ |
| 2687 | NULL, /* Security */ |
| 2688 | NULL, /* thread */ |
| 2689 | TRUE, /* inherit handles */ |
| 2690 | flags, /* start flags */ |
| 2691 | w32env, /* environment */ |
| 2692 | NULL, /* current directory */ |
| 2693 | &si, |
| 2694 | &pi); |
| 2695 | if (tty != INVALID_HANDLE_VALUE) |
| 2696 | CloseHandle (tty); |
| 2697 | if (fd_inp >= 0) |
| 2698 | _close (fd_inp); |
| 2699 | if (fd_out >= 0) |
| 2700 | _close (fd_out); |
| 2701 | if (fd_err >= 0) |
| 2702 | _close (fd_err); |
| 2703 | #endif /* !__CYGWIN__ */ |
| 2704 | |
| 2705 | if (!ret) |
| 2706 | error (_("Error creating process %s, (error %u)."), |
| 2707 | exec_file, (unsigned) GetLastError ()); |
| 2708 | |
| 2709 | CloseHandle (pi.hThread); |
| 2710 | CloseHandle (pi.hProcess); |
| 2711 | |
| 2712 | if (useshell && shell[0] != '\0') |
| 2713 | saw_create = -1; |
| 2714 | else |
| 2715 | saw_create = 0; |
| 2716 | |
| 2717 | do_initial_windows_stuff (ops, pi.dwProcessId, 0); |
| 2718 | |
| 2719 | /* windows_continue (DBG_CONTINUE, -1, 0); */ |
| 2720 | } |
| 2721 | |
| 2722 | static void |
| 2723 | windows_mourn_inferior (struct target_ops *ops) |
| 2724 | { |
| 2725 | (void) windows_continue (DBG_CONTINUE, -1, 0); |
| 2726 | x86_cleanup_dregs(); |
| 2727 | if (open_process_used) |
| 2728 | { |
| 2729 | CHECK (CloseHandle (current_process_handle)); |
| 2730 | open_process_used = 0; |
| 2731 | } |
| 2732 | inf_child_mourn_inferior (ops); |
| 2733 | } |
| 2734 | |
| 2735 | /* Send a SIGINT to the process group. This acts just like the user typed a |
| 2736 | ^C on the controlling terminal. */ |
| 2737 | |
| 2738 | static void |
| 2739 | windows_interrupt (struct target_ops *self, ptid_t ptid) |
| 2740 | { |
| 2741 | DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n")); |
| 2742 | CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId)); |
| 2743 | registers_changed (); /* refresh register state */ |
| 2744 | } |
| 2745 | |
| 2746 | /* Helper for windows_xfer_partial that handles memory transfers. |
| 2747 | Arguments are like target_xfer_partial. */ |
| 2748 | |
| 2749 | static enum target_xfer_status |
| 2750 | windows_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, |
| 2751 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
| 2752 | { |
| 2753 | SIZE_T done = 0; |
| 2754 | BOOL success; |
| 2755 | DWORD lasterror = 0; |
| 2756 | |
| 2757 | if (writebuf != NULL) |
| 2758 | { |
| 2759 | DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n", |
| 2760 | pulongest (len), core_addr_to_string (memaddr))); |
| 2761 | success = WriteProcessMemory (current_process_handle, |
| 2762 | (LPVOID) (uintptr_t) memaddr, writebuf, |
| 2763 | len, &done); |
| 2764 | if (!success) |
| 2765 | lasterror = GetLastError (); |
| 2766 | FlushInstructionCache (current_process_handle, |
| 2767 | (LPCVOID) (uintptr_t) memaddr, len); |
| 2768 | } |
| 2769 | else |
| 2770 | { |
| 2771 | DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n", |
| 2772 | pulongest (len), core_addr_to_string (memaddr))); |
| 2773 | success = ReadProcessMemory (current_process_handle, |
| 2774 | (LPCVOID) (uintptr_t) memaddr, readbuf, |
| 2775 | len, &done); |
| 2776 | if (!success) |
| 2777 | lasterror = GetLastError (); |
| 2778 | } |
| 2779 | *xfered_len = (ULONGEST) done; |
| 2780 | if (!success && lasterror == ERROR_PARTIAL_COPY && done > 0) |
| 2781 | return TARGET_XFER_OK; |
| 2782 | else |
| 2783 | return success ? TARGET_XFER_OK : TARGET_XFER_E_IO; |
| 2784 | } |
| 2785 | |
| 2786 | static void |
| 2787 | windows_kill_inferior (struct target_ops *ops) |
| 2788 | { |
| 2789 | CHECK (TerminateProcess (current_process_handle, 0)); |
| 2790 | |
| 2791 | for (;;) |
| 2792 | { |
| 2793 | if (!windows_continue (DBG_CONTINUE, -1, 1)) |
| 2794 | break; |
| 2795 | if (!WaitForDebugEvent (¤t_event, INFINITE)) |
| 2796 | break; |
| 2797 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) |
| 2798 | break; |
| 2799 | } |
| 2800 | |
| 2801 | target_mourn_inferior (inferior_ptid); /* Or just windows_mourn_inferior? */ |
| 2802 | } |
| 2803 | |
| 2804 | static void |
| 2805 | windows_close (struct target_ops *self) |
| 2806 | { |
| 2807 | DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n", |
| 2808 | ptid_get_pid (inferior_ptid))); |
| 2809 | } |
| 2810 | |
| 2811 | /* Convert pid to printable format. */ |
| 2812 | static const char * |
| 2813 | windows_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| 2814 | { |
| 2815 | static char buf[80]; |
| 2816 | |
| 2817 | if (ptid_get_tid (ptid) != 0) |
| 2818 | { |
| 2819 | snprintf (buf, sizeof (buf), "Thread %d.0x%lx", |
| 2820 | ptid_get_pid (ptid), ptid_get_tid (ptid)); |
| 2821 | return buf; |
| 2822 | } |
| 2823 | |
| 2824 | return normal_pid_to_str (ptid); |
| 2825 | } |
| 2826 | |
| 2827 | static enum target_xfer_status |
| 2828 | windows_xfer_shared_libraries (struct target_ops *ops, |
| 2829 | enum target_object object, const char *annex, |
| 2830 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 2831 | ULONGEST offset, ULONGEST len, |
| 2832 | ULONGEST *xfered_len) |
| 2833 | { |
| 2834 | struct obstack obstack; |
| 2835 | const char *buf; |
| 2836 | LONGEST len_avail; |
| 2837 | struct so_list *so; |
| 2838 | |
| 2839 | if (writebuf) |
| 2840 | return TARGET_XFER_E_IO; |
| 2841 | |
| 2842 | obstack_init (&obstack); |
| 2843 | obstack_grow_str (&obstack, "<library-list>\n"); |
| 2844 | for (so = solib_start.next; so; so = so->next) |
| 2845 | windows_xfer_shared_library (so->so_name, (CORE_ADDR) |
| 2846 | (uintptr_t) so->lm_info->load_addr, |
| 2847 | target_gdbarch (), &obstack); |
| 2848 | obstack_grow_str0 (&obstack, "</library-list>\n"); |
| 2849 | |
| 2850 | buf = (const char *) obstack_finish (&obstack); |
| 2851 | len_avail = strlen (buf); |
| 2852 | if (offset >= len_avail) |
| 2853 | len= 0; |
| 2854 | else |
| 2855 | { |
| 2856 | if (len > len_avail - offset) |
| 2857 | len = len_avail - offset; |
| 2858 | memcpy (readbuf, buf + offset, len); |
| 2859 | } |
| 2860 | |
| 2861 | obstack_free (&obstack, NULL); |
| 2862 | *xfered_len = (ULONGEST) len; |
| 2863 | return len != 0 ? TARGET_XFER_OK : TARGET_XFER_EOF; |
| 2864 | } |
| 2865 | |
| 2866 | static enum target_xfer_status |
| 2867 | windows_xfer_partial (struct target_ops *ops, enum target_object object, |
| 2868 | const char *annex, gdb_byte *readbuf, |
| 2869 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
| 2870 | ULONGEST *xfered_len) |
| 2871 | { |
| 2872 | switch (object) |
| 2873 | { |
| 2874 | case TARGET_OBJECT_MEMORY: |
| 2875 | return windows_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
| 2876 | |
| 2877 | case TARGET_OBJECT_LIBRARIES: |
| 2878 | return windows_xfer_shared_libraries (ops, object, annex, readbuf, |
| 2879 | writebuf, offset, len, xfered_len); |
| 2880 | |
| 2881 | default: |
| 2882 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
| 2883 | readbuf, writebuf, offset, len, |
| 2884 | xfered_len); |
| 2885 | } |
| 2886 | } |
| 2887 | |
| 2888 | /* Provide thread local base, i.e. Thread Information Block address. |
| 2889 | Returns 1 if ptid is found and sets *ADDR to thread_local_base. */ |
| 2890 | |
| 2891 | static int |
| 2892 | windows_get_tib_address (struct target_ops *self, |
| 2893 | ptid_t ptid, CORE_ADDR *addr) |
| 2894 | { |
| 2895 | windows_thread_info *th; |
| 2896 | |
| 2897 | th = thread_rec (ptid_get_tid (ptid), 0); |
| 2898 | if (th == NULL) |
| 2899 | return 0; |
| 2900 | |
| 2901 | if (addr != NULL) |
| 2902 | *addr = th->thread_local_base; |
| 2903 | |
| 2904 | return 1; |
| 2905 | } |
| 2906 | |
| 2907 | static ptid_t |
| 2908 | windows_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) |
| 2909 | { |
| 2910 | return ptid_build (ptid_get_pid (inferior_ptid), 0, lwp); |
| 2911 | } |
| 2912 | |
| 2913 | /* Implementation of the to_thread_name method. */ |
| 2914 | |
| 2915 | static const char * |
| 2916 | windows_thread_name (struct target_ops *self, struct thread_info *thr) |
| 2917 | { |
| 2918 | return thread_rec (ptid_get_tid (thr->ptid), 0)->name; |
| 2919 | } |
| 2920 | |
| 2921 | static struct target_ops * |
| 2922 | windows_target (void) |
| 2923 | { |
| 2924 | struct target_ops *t = inf_child_target (); |
| 2925 | |
| 2926 | t->to_close = windows_close; |
| 2927 | t->to_attach = windows_attach; |
| 2928 | t->to_attach_no_wait = 1; |
| 2929 | t->to_detach = windows_detach; |
| 2930 | t->to_resume = windows_resume; |
| 2931 | t->to_wait = windows_wait; |
| 2932 | t->to_fetch_registers = windows_fetch_inferior_registers; |
| 2933 | t->to_store_registers = windows_store_inferior_registers; |
| 2934 | t->to_xfer_partial = windows_xfer_partial; |
| 2935 | t->to_files_info = windows_files_info; |
| 2936 | t->to_kill = windows_kill_inferior; |
| 2937 | t->to_create_inferior = windows_create_inferior; |
| 2938 | t->to_mourn_inferior = windows_mourn_inferior; |
| 2939 | t->to_thread_alive = windows_thread_alive; |
| 2940 | t->to_pid_to_str = windows_pid_to_str; |
| 2941 | t->to_interrupt = windows_interrupt; |
| 2942 | t->to_pid_to_exec_file = windows_pid_to_exec_file; |
| 2943 | t->to_get_ada_task_ptid = windows_get_ada_task_ptid; |
| 2944 | t->to_get_tib_address = windows_get_tib_address; |
| 2945 | t->to_thread_name = windows_thread_name; |
| 2946 | |
| 2947 | return t; |
| 2948 | } |
| 2949 | |
| 2950 | /* -Wmissing-prototypes */ |
| 2951 | extern initialize_file_ftype _initialize_windows_nat; |
| 2952 | |
| 2953 | void |
| 2954 | _initialize_windows_nat (void) |
| 2955 | { |
| 2956 | struct target_ops *t; |
| 2957 | |
| 2958 | t = windows_target (); |
| 2959 | |
| 2960 | x86_use_watchpoints (t); |
| 2961 | |
| 2962 | x86_dr_low.set_control = cygwin_set_dr7; |
| 2963 | x86_dr_low.set_addr = cygwin_set_dr; |
| 2964 | x86_dr_low.get_addr = cygwin_get_dr; |
| 2965 | x86_dr_low.get_status = cygwin_get_dr6; |
| 2966 | x86_dr_low.get_control = cygwin_get_dr7; |
| 2967 | |
| 2968 | /* x86_dr_low.debug_register_length field is set by |
| 2969 | calling x86_set_debug_register_length function |
| 2970 | in processor windows specific native file. */ |
| 2971 | |
| 2972 | add_target (t); |
| 2973 | |
| 2974 | #ifdef __CYGWIN__ |
| 2975 | cygwin_internal (CW_SET_DOS_FILE_WARNING, 0); |
| 2976 | #endif |
| 2977 | |
| 2978 | add_com ("signal-event", class_run, signal_event_command, _("\ |
| 2979 | Signal a crashed process with event ID, to allow its debugging.\n\ |
| 2980 | This command is needed in support of setting up GDB as JIT debugger on \ |
| 2981 | MS-Windows. The command should be invoked from the GDB command line using \ |
| 2982 | the '-ex' command-line option. The ID of the event that blocks the \ |
| 2983 | crashed process will be supplied by the Windows JIT debugging mechanism.")); |
| 2984 | |
| 2985 | #ifdef __CYGWIN__ |
| 2986 | add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\ |
| 2987 | Set use of shell to start subprocess."), _("\ |
| 2988 | Show use of shell to start subprocess."), NULL, |
| 2989 | NULL, |
| 2990 | NULL, /* FIXME: i18n: */ |
| 2991 | &setlist, &showlist); |
| 2992 | |
| 2993 | add_setshow_boolean_cmd ("cygwin-exceptions", class_support, |
| 2994 | &cygwin_exceptions, _("\ |
| 2995 | Break when an exception is detected in the Cygwin DLL itself."), _("\ |
| 2996 | Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL, |
| 2997 | NULL, |
| 2998 | NULL, /* FIXME: i18n: */ |
| 2999 | &setlist, &showlist); |
| 3000 | #endif |
| 3001 | |
| 3002 | add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\ |
| 3003 | Set creation of new console when creating child process."), _("\ |
| 3004 | Show creation of new console when creating child process."), NULL, |
| 3005 | NULL, |
| 3006 | NULL, /* FIXME: i18n: */ |
| 3007 | &setlist, &showlist); |
| 3008 | |
| 3009 | add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\ |
| 3010 | Set creation of new group when creating child process."), _("\ |
| 3011 | Show creation of new group when creating child process."), NULL, |
| 3012 | NULL, |
| 3013 | NULL, /* FIXME: i18n: */ |
| 3014 | &setlist, &showlist); |
| 3015 | |
| 3016 | add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\ |
| 3017 | Set whether to display execution in child process."), _("\ |
| 3018 | Show whether to display execution in child process."), NULL, |
| 3019 | NULL, |
| 3020 | NULL, /* FIXME: i18n: */ |
| 3021 | &setlist, &showlist); |
| 3022 | |
| 3023 | add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\ |
| 3024 | Set whether to display kernel events in child process."), _("\ |
| 3025 | Show whether to display kernel events in child process."), NULL, |
| 3026 | NULL, |
| 3027 | NULL, /* FIXME: i18n: */ |
| 3028 | &setlist, &showlist); |
| 3029 | |
| 3030 | add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\ |
| 3031 | Set whether to display memory accesses in child process."), _("\ |
| 3032 | Show whether to display memory accesses in child process."), NULL, |
| 3033 | NULL, |
| 3034 | NULL, /* FIXME: i18n: */ |
| 3035 | &setlist, &showlist); |
| 3036 | |
| 3037 | add_setshow_boolean_cmd ("debugexceptions", class_support, |
| 3038 | &debug_exceptions, _("\ |
| 3039 | Set whether to display kernel exceptions in child process."), _("\ |
| 3040 | Show whether to display kernel exceptions in child process."), NULL, |
| 3041 | NULL, |
| 3042 | NULL, /* FIXME: i18n: */ |
| 3043 | &setlist, &showlist); |
| 3044 | |
| 3045 | init_w32_command_list (); |
| 3046 | |
| 3047 | add_cmd ("selector", class_info, display_selectors, |
| 3048 | _("Display selectors infos."), |
| 3049 | &info_w32_cmdlist); |
| 3050 | } |
| 3051 | |
| 3052 | /* Hardware watchpoint support, adapted from go32-nat.c code. */ |
| 3053 | |
| 3054 | /* Pass the address ADDR to the inferior in the I'th debug register. |
| 3055 | Here we just store the address in dr array, the registers will be |
| 3056 | actually set up when windows_continue is called. */ |
| 3057 | static void |
| 3058 | cygwin_set_dr (int i, CORE_ADDR addr) |
| 3059 | { |
| 3060 | if (i < 0 || i > 3) |
| 3061 | internal_error (__FILE__, __LINE__, |
| 3062 | _("Invalid register %d in cygwin_set_dr.\n"), i); |
| 3063 | dr[i] = addr; |
| 3064 | debug_registers_changed = 1; |
| 3065 | debug_registers_used = 1; |
| 3066 | } |
| 3067 | |
| 3068 | /* Pass the value VAL to the inferior in the DR7 debug control |
| 3069 | register. Here we just store the address in D_REGS, the watchpoint |
| 3070 | will be actually set up in windows_wait. */ |
| 3071 | static void |
| 3072 | cygwin_set_dr7 (unsigned long val) |
| 3073 | { |
| 3074 | dr[7] = (CORE_ADDR) val; |
| 3075 | debug_registers_changed = 1; |
| 3076 | debug_registers_used = 1; |
| 3077 | } |
| 3078 | |
| 3079 | /* Get the value of debug register I from the inferior. */ |
| 3080 | |
| 3081 | static CORE_ADDR |
| 3082 | cygwin_get_dr (int i) |
| 3083 | { |
| 3084 | return dr[i]; |
| 3085 | } |
| 3086 | |
| 3087 | /* Get the value of the DR6 debug status register from the inferior. |
| 3088 | Here we just return the value stored in dr[6] |
| 3089 | by the last call to thread_rec for current_event.dwThreadId id. */ |
| 3090 | static unsigned long |
| 3091 | cygwin_get_dr6 (void) |
| 3092 | { |
| 3093 | return (unsigned long) dr[6]; |
| 3094 | } |
| 3095 | |
| 3096 | /* Get the value of the DR7 debug status register from the inferior. |
| 3097 | Here we just return the value stored in dr[7] by the last call to |
| 3098 | thread_rec for current_event.dwThreadId id. */ |
| 3099 | |
| 3100 | static unsigned long |
| 3101 | cygwin_get_dr7 (void) |
| 3102 | { |
| 3103 | return (unsigned long) dr[7]; |
| 3104 | } |
| 3105 | |
| 3106 | /* Determine if the thread referenced by "ptid" is alive |
| 3107 | by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0 |
| 3108 | it means that the thread has died. Otherwise it is assumed to be alive. */ |
| 3109 | static int |
| 3110 | windows_thread_alive (struct target_ops *ops, ptid_t ptid) |
| 3111 | { |
| 3112 | int tid; |
| 3113 | |
| 3114 | gdb_assert (ptid_get_tid (ptid) != 0); |
| 3115 | tid = ptid_get_tid (ptid); |
| 3116 | |
| 3117 | return WaitForSingleObject (thread_rec (tid, FALSE)->h, 0) == WAIT_OBJECT_0 |
| 3118 | ? FALSE : TRUE; |
| 3119 | } |
| 3120 | |
| 3121 | /* -Wmissing-prototypes */ |
| 3122 | extern initialize_file_ftype _initialize_check_for_gdb_ini; |
| 3123 | |
| 3124 | void |
| 3125 | _initialize_check_for_gdb_ini (void) |
| 3126 | { |
| 3127 | char *homedir; |
| 3128 | if (inhibit_gdbinit) |
| 3129 | return; |
| 3130 | |
| 3131 | homedir = getenv ("HOME"); |
| 3132 | if (homedir) |
| 3133 | { |
| 3134 | char *p; |
| 3135 | char *oldini = (char *) alloca (strlen (homedir) + |
| 3136 | sizeof ("gdb.ini") + 1); |
| 3137 | strcpy (oldini, homedir); |
| 3138 | p = strchr (oldini, '\0'); |
| 3139 | if (p > oldini && !IS_DIR_SEPARATOR (p[-1])) |
| 3140 | *p++ = '/'; |
| 3141 | strcpy (p, "gdb.ini"); |
| 3142 | if (access (oldini, 0) == 0) |
| 3143 | { |
| 3144 | int len = strlen (oldini); |
| 3145 | char *newini = (char *) alloca (len + 2); |
| 3146 | |
| 3147 | xsnprintf (newini, len + 2, "%.*s.gdbinit", |
| 3148 | (int) (len - (sizeof ("gdb.ini") - 1)), oldini); |
| 3149 | warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini); |
| 3150 | } |
| 3151 | } |
| 3152 | } |
| 3153 | |
| 3154 | /* Define dummy functions which always return error for the rare cases where |
| 3155 | these functions could not be found. */ |
| 3156 | static BOOL WINAPI |
| 3157 | bad_DebugActiveProcessStop (DWORD w) |
| 3158 | { |
| 3159 | return FALSE; |
| 3160 | } |
| 3161 | static BOOL WINAPI |
| 3162 | bad_DebugBreakProcess (HANDLE w) |
| 3163 | { |
| 3164 | return FALSE; |
| 3165 | } |
| 3166 | static BOOL WINAPI |
| 3167 | bad_DebugSetProcessKillOnExit (BOOL w) |
| 3168 | { |
| 3169 | return FALSE; |
| 3170 | } |
| 3171 | static BOOL WINAPI |
| 3172 | bad_EnumProcessModules (HANDLE w, HMODULE *x, DWORD y, LPDWORD z) |
| 3173 | { |
| 3174 | return FALSE; |
| 3175 | } |
| 3176 | |
| 3177 | #ifdef __USEWIDE |
| 3178 | static DWORD WINAPI |
| 3179 | bad_GetModuleFileNameExW (HANDLE w, HMODULE x, LPWSTR y, DWORD z) |
| 3180 | { |
| 3181 | return 0; |
| 3182 | } |
| 3183 | #else |
| 3184 | static DWORD WINAPI |
| 3185 | bad_GetModuleFileNameExA (HANDLE w, HMODULE x, LPSTR y, DWORD z) |
| 3186 | { |
| 3187 | return 0; |
| 3188 | } |
| 3189 | #endif |
| 3190 | |
| 3191 | static BOOL WINAPI |
| 3192 | bad_GetModuleInformation (HANDLE w, HMODULE x, LPMODULEINFO y, DWORD z) |
| 3193 | { |
| 3194 | return FALSE; |
| 3195 | } |
| 3196 | |
| 3197 | static BOOL WINAPI |
| 3198 | bad_OpenProcessToken (HANDLE w, DWORD x, PHANDLE y) |
| 3199 | { |
| 3200 | return FALSE; |
| 3201 | } |
| 3202 | |
| 3203 | static BOOL WINAPI |
| 3204 | bad_GetCurrentConsoleFont (HANDLE w, BOOL bMaxWindow, CONSOLE_FONT_INFO *f) |
| 3205 | { |
| 3206 | f->nFont = 0; |
| 3207 | return 1; |
| 3208 | } |
| 3209 | static COORD WINAPI |
| 3210 | bad_GetConsoleFontSize (HANDLE w, DWORD nFont) |
| 3211 | { |
| 3212 | COORD size; |
| 3213 | size.X = 8; |
| 3214 | size.Y = 12; |
| 3215 | return size; |
| 3216 | } |
| 3217 | |
| 3218 | /* -Wmissing-prototypes */ |
| 3219 | extern initialize_file_ftype _initialize_loadable; |
| 3220 | |
| 3221 | /* Load any functions which may not be available in ancient versions |
| 3222 | of Windows. */ |
| 3223 | |
| 3224 | void |
| 3225 | _initialize_loadable (void) |
| 3226 | { |
| 3227 | HMODULE hm = NULL; |
| 3228 | |
| 3229 | #define GPA(m, func) \ |
| 3230 | func = (func ## _ftype *) GetProcAddress (m, #func) |
| 3231 | |
| 3232 | hm = LoadLibrary ("kernel32.dll"); |
| 3233 | if (hm) |
| 3234 | { |
| 3235 | GPA (hm, DebugActiveProcessStop); |
| 3236 | GPA (hm, DebugBreakProcess); |
| 3237 | GPA (hm, DebugSetProcessKillOnExit); |
| 3238 | GPA (hm, GetConsoleFontSize); |
| 3239 | GPA (hm, DebugActiveProcessStop); |
| 3240 | GPA (hm, GetCurrentConsoleFont); |
| 3241 | } |
| 3242 | |
| 3243 | /* Set variables to dummy versions of these processes if the function |
| 3244 | wasn't found in kernel32.dll. */ |
| 3245 | if (!DebugBreakProcess) |
| 3246 | DebugBreakProcess = bad_DebugBreakProcess; |
| 3247 | if (!DebugActiveProcessStop || !DebugSetProcessKillOnExit) |
| 3248 | { |
| 3249 | DebugActiveProcessStop = bad_DebugActiveProcessStop; |
| 3250 | DebugSetProcessKillOnExit = bad_DebugSetProcessKillOnExit; |
| 3251 | } |
| 3252 | if (!GetConsoleFontSize) |
| 3253 | GetConsoleFontSize = bad_GetConsoleFontSize; |
| 3254 | if (!GetCurrentConsoleFont) |
| 3255 | GetCurrentConsoleFont = bad_GetCurrentConsoleFont; |
| 3256 | |
| 3257 | /* Load optional functions used for retrieving filename information |
| 3258 | associated with the currently debugged process or its dlls. */ |
| 3259 | hm = LoadLibrary ("psapi.dll"); |
| 3260 | if (hm) |
| 3261 | { |
| 3262 | GPA (hm, EnumProcessModules); |
| 3263 | GPA (hm, GetModuleInformation); |
| 3264 | GetModuleFileNameEx = (GetModuleFileNameEx_ftype *) |
| 3265 | GetProcAddress (hm, GetModuleFileNameEx_name); |
| 3266 | } |
| 3267 | |
| 3268 | if (!EnumProcessModules || !GetModuleInformation || !GetModuleFileNameEx) |
| 3269 | { |
| 3270 | /* Set variables to dummy versions of these processes if the function |
| 3271 | wasn't found in psapi.dll. */ |
| 3272 | EnumProcessModules = bad_EnumProcessModules; |
| 3273 | GetModuleInformation = bad_GetModuleInformation; |
| 3274 | GetModuleFileNameEx = bad_GetModuleFileNameEx; |
| 3275 | /* This will probably fail on Windows 9x/Me. Let the user know |
| 3276 | that we're missing some functionality. */ |
| 3277 | warning(_("\ |
| 3278 | cannot automatically find executable file or library to read symbols.\n\ |
| 3279 | Use \"file\" or \"dll\" command to load executable/libraries directly.")); |
| 3280 | } |
| 3281 | |
| 3282 | hm = LoadLibrary ("advapi32.dll"); |
| 3283 | if (hm) |
| 3284 | { |
| 3285 | GPA (hm, OpenProcessToken); |
| 3286 | GPA (hm, LookupPrivilegeValueA); |
| 3287 | GPA (hm, AdjustTokenPrivileges); |
| 3288 | /* Only need to set one of these since if OpenProcessToken fails nothing |
| 3289 | else is needed. */ |
| 3290 | if (!OpenProcessToken || !LookupPrivilegeValueA |
| 3291 | || !AdjustTokenPrivileges) |
| 3292 | OpenProcessToken = bad_OpenProcessToken; |
| 3293 | } |
| 3294 | |
| 3295 | #undef GPA |
| 3296 | } |