| 1 | /* Target-vector operations for controlling windows child processes, for GDB. |
| 2 | |
| 3 | Copyright (C) 1995-2020 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 | #include <algorithm> |
| 46 | |
| 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 | #include "gdbsupport/gdb_tilde_expand.h" |
| 70 | #include "gdbsupport/pathstuff.h" |
| 71 | #include "gdbsupport/gdb_wait.h" |
| 72 | |
| 73 | #define AdjustTokenPrivileges dyn_AdjustTokenPrivileges |
| 74 | #define DebugActiveProcessStop dyn_DebugActiveProcessStop |
| 75 | #define DebugBreakProcess dyn_DebugBreakProcess |
| 76 | #define DebugSetProcessKillOnExit dyn_DebugSetProcessKillOnExit |
| 77 | #define EnumProcessModules dyn_EnumProcessModules |
| 78 | #define GetModuleInformation dyn_GetModuleInformation |
| 79 | #define LookupPrivilegeValueA dyn_LookupPrivilegeValueA |
| 80 | #define OpenProcessToken dyn_OpenProcessToken |
| 81 | #define GetConsoleFontSize dyn_GetConsoleFontSize |
| 82 | #define GetCurrentConsoleFont dyn_GetCurrentConsoleFont |
| 83 | |
| 84 | typedef BOOL WINAPI (AdjustTokenPrivileges_ftype) (HANDLE, BOOL, |
| 85 | PTOKEN_PRIVILEGES, |
| 86 | DWORD, PTOKEN_PRIVILEGES, |
| 87 | PDWORD); |
| 88 | static AdjustTokenPrivileges_ftype *AdjustTokenPrivileges; |
| 89 | |
| 90 | typedef BOOL WINAPI (DebugActiveProcessStop_ftype) (DWORD); |
| 91 | static DebugActiveProcessStop_ftype *DebugActiveProcessStop; |
| 92 | |
| 93 | typedef BOOL WINAPI (DebugBreakProcess_ftype) (HANDLE); |
| 94 | static DebugBreakProcess_ftype *DebugBreakProcess; |
| 95 | |
| 96 | typedef BOOL WINAPI (DebugSetProcessKillOnExit_ftype) (BOOL); |
| 97 | static DebugSetProcessKillOnExit_ftype *DebugSetProcessKillOnExit; |
| 98 | |
| 99 | typedef BOOL WINAPI (EnumProcessModules_ftype) (HANDLE, HMODULE *, DWORD, |
| 100 | LPDWORD); |
| 101 | static EnumProcessModules_ftype *EnumProcessModules; |
| 102 | |
| 103 | typedef BOOL WINAPI (GetModuleInformation_ftype) (HANDLE, HMODULE, |
| 104 | LPMODULEINFO, DWORD); |
| 105 | static GetModuleInformation_ftype *GetModuleInformation; |
| 106 | |
| 107 | typedef BOOL WINAPI (LookupPrivilegeValueA_ftype) (LPCSTR, LPCSTR, PLUID); |
| 108 | static LookupPrivilegeValueA_ftype *LookupPrivilegeValueA; |
| 109 | |
| 110 | typedef BOOL WINAPI (OpenProcessToken_ftype) (HANDLE, DWORD, PHANDLE); |
| 111 | static OpenProcessToken_ftype *OpenProcessToken; |
| 112 | |
| 113 | typedef BOOL WINAPI (GetCurrentConsoleFont_ftype) (HANDLE, BOOL, |
| 114 | CONSOLE_FONT_INFO *); |
| 115 | static GetCurrentConsoleFont_ftype *GetCurrentConsoleFont; |
| 116 | |
| 117 | typedef COORD WINAPI (GetConsoleFontSize_ftype) (HANDLE, DWORD); |
| 118 | static GetConsoleFontSize_ftype *GetConsoleFontSize; |
| 119 | |
| 120 | #undef STARTUPINFO |
| 121 | #undef CreateProcess |
| 122 | #undef GetModuleFileNameEx |
| 123 | |
| 124 | #ifndef __CYGWIN__ |
| 125 | # define __PMAX (MAX_PATH + 1) |
| 126 | typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE, LPSTR, DWORD); |
| 127 | static GetModuleFileNameEx_ftype *GetModuleFileNameEx; |
| 128 | # define STARTUPINFO STARTUPINFOA |
| 129 | # define CreateProcess CreateProcessA |
| 130 | # define GetModuleFileNameEx_name "GetModuleFileNameExA" |
| 131 | # define bad_GetModuleFileNameEx bad_GetModuleFileNameExA |
| 132 | #else |
| 133 | # define __PMAX PATH_MAX |
| 134 | /* The starting and ending address of the cygwin1.dll text segment. */ |
| 135 | static CORE_ADDR cygwin_load_start; |
| 136 | static CORE_ADDR cygwin_load_end; |
| 137 | # define __USEWIDE |
| 138 | typedef wchar_t cygwin_buf_t; |
| 139 | typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE, |
| 140 | LPWSTR, DWORD); |
| 141 | static GetModuleFileNameEx_ftype *GetModuleFileNameEx; |
| 142 | # define STARTUPINFO STARTUPINFOW |
| 143 | # define CreateProcess CreateProcessW |
| 144 | # define GetModuleFileNameEx_name "GetModuleFileNameExW" |
| 145 | # define bad_GetModuleFileNameEx bad_GetModuleFileNameExW |
| 146 | #endif |
| 147 | |
| 148 | static int have_saved_context; /* True if we've saved context from a |
| 149 | cygwin signal. */ |
| 150 | #ifdef __CYGWIN__ |
| 151 | static CONTEXT saved_context; /* Contains the saved context from a |
| 152 | cygwin signal. */ |
| 153 | #endif |
| 154 | |
| 155 | /* If we're not using the old Cygwin header file set, define the |
| 156 | following which never should have been in the generic Win32 API |
| 157 | headers in the first place since they were our own invention... */ |
| 158 | #ifndef _GNU_H_WINDOWS_H |
| 159 | enum |
| 160 | { |
| 161 | FLAG_TRACE_BIT = 0x100, |
| 162 | }; |
| 163 | #endif |
| 164 | |
| 165 | #ifndef CONTEXT_EXTENDED_REGISTERS |
| 166 | /* This macro is only defined on ia32. It only makes sense on this target, |
| 167 | so define it as zero if not already defined. */ |
| 168 | #define CONTEXT_EXTENDED_REGISTERS 0 |
| 169 | #endif |
| 170 | |
| 171 | #define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \ |
| 172 | | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \ |
| 173 | | CONTEXT_EXTENDED_REGISTERS |
| 174 | |
| 175 | static uintptr_t dr[8]; |
| 176 | static int debug_registers_changed; |
| 177 | static int debug_registers_used; |
| 178 | |
| 179 | static int windows_initialization_done; |
| 180 | #define DR6_CLEAR_VALUE 0xffff0ff0 |
| 181 | |
| 182 | /* The exception thrown by a program to tell the debugger the name of |
| 183 | a thread. The exception record contains an ID of a thread and a |
| 184 | name to give it. This exception has no documented name, but MSDN |
| 185 | dubs it "MS_VC_EXCEPTION" in one code example. */ |
| 186 | #define MS_VC_EXCEPTION 0x406d1388 |
| 187 | |
| 188 | typedef enum |
| 189 | { |
| 190 | HANDLE_EXCEPTION_UNHANDLED = 0, |
| 191 | HANDLE_EXCEPTION_HANDLED, |
| 192 | HANDLE_EXCEPTION_IGNORED |
| 193 | } handle_exception_result; |
| 194 | |
| 195 | /* The string sent by cygwin when it processes a signal. |
| 196 | FIXME: This should be in a cygwin include file. */ |
| 197 | #ifndef _CYGWIN_SIGNAL_STRING |
| 198 | #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f" |
| 199 | #endif |
| 200 | |
| 201 | #define CHECK(x) check (x, __FILE__,__LINE__) |
| 202 | #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x |
| 203 | #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x |
| 204 | #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x |
| 205 | #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x |
| 206 | |
| 207 | static void cygwin_set_dr (int i, CORE_ADDR addr); |
| 208 | static void cygwin_set_dr7 (unsigned long val); |
| 209 | static CORE_ADDR cygwin_get_dr (int i); |
| 210 | static unsigned long cygwin_get_dr6 (void); |
| 211 | static unsigned long cygwin_get_dr7 (void); |
| 212 | |
| 213 | static enum gdb_signal last_sig = GDB_SIGNAL_0; |
| 214 | /* Set if a signal was received from the debugged process. */ |
| 215 | |
| 216 | /* Thread information structure used to track information that is |
| 217 | not available in gdb's thread structure. */ |
| 218 | typedef struct windows_thread_info_struct |
| 219 | { |
| 220 | struct windows_thread_info_struct *next; |
| 221 | DWORD id; |
| 222 | HANDLE h; |
| 223 | CORE_ADDR thread_local_base; |
| 224 | char *name; |
| 225 | int suspended; |
| 226 | int reload_context; |
| 227 | CONTEXT context; |
| 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 | |
| 240 | /* Counts of things. */ |
| 241 | static int exception_count = 0; |
| 242 | static int event_count = 0; |
| 243 | static int saw_create; |
| 244 | static int open_process_used = 0; |
| 245 | |
| 246 | /* User options. */ |
| 247 | static bool new_console = false; |
| 248 | #ifdef __CYGWIN__ |
| 249 | static bool cygwin_exceptions = false; |
| 250 | #endif |
| 251 | static bool new_group = true; |
| 252 | static bool debug_exec = false; /* show execution */ |
| 253 | static bool debug_events = false; /* show events from kernel */ |
| 254 | static bool debug_memory = false; /* show target memory accesses */ |
| 255 | static bool debug_exceptions = false; /* show target exceptions */ |
| 256 | static bool useshell = false; /* use shell for subprocesses */ |
| 257 | |
| 258 | /* This vector maps GDB's idea of a register's number into an offset |
| 259 | in the windows exception context vector. |
| 260 | |
| 261 | It also contains the bit mask needed to load the register in question. |
| 262 | |
| 263 | The contents of this table can only be computed by the units |
| 264 | that provide CPU-specific support for Windows native debugging. |
| 265 | These units should set the table by calling |
| 266 | windows_set_context_register_offsets. |
| 267 | |
| 268 | One day we could read a reg, we could inspect the context we |
| 269 | already have loaded, if it doesn't have the bit set that we need, |
| 270 | we read that set of registers in using GetThreadContext. If the |
| 271 | context already contains what we need, we just unpack it. Then to |
| 272 | write a register, first we have to ensure that the context contains |
| 273 | the other regs of the group, and then we copy the info in and set |
| 274 | out bit. */ |
| 275 | |
| 276 | static const int *mappings; |
| 277 | |
| 278 | /* The function to use in order to determine whether a register is |
| 279 | a segment register or not. */ |
| 280 | static segment_register_p_ftype *segment_register_p; |
| 281 | |
| 282 | /* See windows_nat_target::resume to understand why this is commented |
| 283 | out. */ |
| 284 | #if 0 |
| 285 | /* This vector maps the target's idea of an exception (extracted |
| 286 | from the DEBUG_EVENT structure) to GDB's idea. */ |
| 287 | |
| 288 | struct xlate_exception |
| 289 | { |
| 290 | DWORD them; |
| 291 | enum gdb_signal us; |
| 292 | }; |
| 293 | |
| 294 | static const struct xlate_exception xlate[] = |
| 295 | { |
| 296 | {EXCEPTION_ACCESS_VIOLATION, GDB_SIGNAL_SEGV}, |
| 297 | {STATUS_STACK_OVERFLOW, GDB_SIGNAL_SEGV}, |
| 298 | {EXCEPTION_BREAKPOINT, GDB_SIGNAL_TRAP}, |
| 299 | {DBG_CONTROL_C, GDB_SIGNAL_INT}, |
| 300 | {EXCEPTION_SINGLE_STEP, GDB_SIGNAL_TRAP}, |
| 301 | {STATUS_FLOAT_DIVIDE_BY_ZERO, GDB_SIGNAL_FPE} |
| 302 | }; |
| 303 | |
| 304 | #endif /* 0 */ |
| 305 | |
| 306 | struct windows_nat_target final : public x86_nat_target<inf_child_target> |
| 307 | { |
| 308 | void close () override; |
| 309 | |
| 310 | void attach (const char *, int) override; |
| 311 | |
| 312 | bool attach_no_wait () override |
| 313 | { return true; } |
| 314 | |
| 315 | void detach (inferior *, int) override; |
| 316 | |
| 317 | void resume (ptid_t, int , enum gdb_signal) override; |
| 318 | |
| 319 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; |
| 320 | |
| 321 | void fetch_registers (struct regcache *, int) override; |
| 322 | void store_registers (struct regcache *, int) override; |
| 323 | |
| 324 | enum target_xfer_status xfer_partial (enum target_object object, |
| 325 | const char *annex, |
| 326 | gdb_byte *readbuf, |
| 327 | const gdb_byte *writebuf, |
| 328 | ULONGEST offset, ULONGEST len, |
| 329 | ULONGEST *xfered_len) override; |
| 330 | |
| 331 | void files_info () override; |
| 332 | |
| 333 | void kill () override; |
| 334 | |
| 335 | void create_inferior (const char *, const std::string &, |
| 336 | char **, int) override; |
| 337 | |
| 338 | void mourn_inferior () override; |
| 339 | |
| 340 | bool thread_alive (ptid_t ptid) override; |
| 341 | |
| 342 | std::string pid_to_str (ptid_t) override; |
| 343 | |
| 344 | void interrupt () override; |
| 345 | |
| 346 | char *pid_to_exec_file (int pid) override; |
| 347 | |
| 348 | ptid_t get_ada_task_ptid (long lwp, long thread) override; |
| 349 | |
| 350 | bool get_tib_address (ptid_t ptid, CORE_ADDR *addr) override; |
| 351 | |
| 352 | const char *thread_name (struct thread_info *) override; |
| 353 | }; |
| 354 | |
| 355 | static windows_nat_target the_windows_nat_target; |
| 356 | |
| 357 | /* Set the MAPPINGS static global to OFFSETS. |
| 358 | See the description of MAPPINGS for more details. */ |
| 359 | |
| 360 | void |
| 361 | windows_set_context_register_offsets (const int *offsets) |
| 362 | { |
| 363 | mappings = offsets; |
| 364 | } |
| 365 | |
| 366 | /* See windows-nat.h. */ |
| 367 | |
| 368 | void |
| 369 | windows_set_segment_register_p (segment_register_p_ftype *fun) |
| 370 | { |
| 371 | segment_register_p = fun; |
| 372 | } |
| 373 | |
| 374 | static void |
| 375 | check (BOOL ok, const char *file, int line) |
| 376 | { |
| 377 | if (!ok) |
| 378 | printf_filtered ("error return %s:%d was %u\n", file, line, |
| 379 | (unsigned) GetLastError ()); |
| 380 | } |
| 381 | |
| 382 | /* Find a thread record given a thread id. If GET_CONTEXT is not 0, |
| 383 | then also retrieve the context for this thread. If GET_CONTEXT is |
| 384 | negative, then don't suspend the thread. */ |
| 385 | static windows_thread_info * |
| 386 | thread_rec (DWORD id, int get_context) |
| 387 | { |
| 388 | windows_thread_info *th; |
| 389 | |
| 390 | for (th = &thread_head; (th = th->next) != NULL;) |
| 391 | if (th->id == id) |
| 392 | { |
| 393 | if (!th->suspended && get_context) |
| 394 | { |
| 395 | if (get_context > 0 && id != current_event.dwThreadId) |
| 396 | { |
| 397 | if (SuspendThread (th->h) == (DWORD) -1) |
| 398 | { |
| 399 | DWORD err = GetLastError (); |
| 400 | |
| 401 | /* We get Access Denied (5) when trying to suspend |
| 402 | threads that Windows started on behalf of the |
| 403 | debuggee, usually when those threads are just |
| 404 | about to exit. |
| 405 | We can get Invalid Handle (6) if the main thread |
| 406 | has exited. */ |
| 407 | if (err != ERROR_INVALID_HANDLE |
| 408 | && err != ERROR_ACCESS_DENIED) |
| 409 | warning (_("SuspendThread (tid=0x%x) failed." |
| 410 | " (winerr %u)"), |
| 411 | (unsigned) id, (unsigned) err); |
| 412 | th->suspended = -1; |
| 413 | } |
| 414 | else |
| 415 | th->suspended = 1; |
| 416 | } |
| 417 | else if (get_context < 0) |
| 418 | th->suspended = -1; |
| 419 | th->reload_context = 1; |
| 420 | } |
| 421 | return th; |
| 422 | } |
| 423 | |
| 424 | return NULL; |
| 425 | } |
| 426 | |
| 427 | /* Add a thread to the thread list. |
| 428 | |
| 429 | PTID is the ptid of the thread to be added. |
| 430 | H is its Windows handle. |
| 431 | TLB is its thread local base. |
| 432 | MAIN_THREAD_P should be true if the thread to be added is |
| 433 | the main thread, false otherwise. */ |
| 434 | |
| 435 | static windows_thread_info * |
| 436 | windows_add_thread (ptid_t ptid, HANDLE h, void *tlb, bool main_thread_p) |
| 437 | { |
| 438 | windows_thread_info *th; |
| 439 | DWORD id; |
| 440 | |
| 441 | gdb_assert (ptid.tid () != 0); |
| 442 | |
| 443 | id = ptid.tid (); |
| 444 | |
| 445 | if ((th = thread_rec (id, FALSE))) |
| 446 | return th; |
| 447 | |
| 448 | th = XCNEW (windows_thread_info); |
| 449 | th->id = id; |
| 450 | th->h = h; |
| 451 | th->thread_local_base = (CORE_ADDR) (uintptr_t) tlb; |
| 452 | th->next = thread_head.next; |
| 453 | thread_head.next = th; |
| 454 | |
| 455 | /* Add this new thread to the list of threads. |
| 456 | |
| 457 | To be consistent with what's done on other platforms, we add |
| 458 | the main thread silently (in reality, this thread is really |
| 459 | more of a process to the user than a thread). */ |
| 460 | if (main_thread_p) |
| 461 | add_thread_silent (ptid); |
| 462 | else |
| 463 | add_thread (ptid); |
| 464 | |
| 465 | /* Set the debug registers for the new thread if they are used. */ |
| 466 | if (debug_registers_used) |
| 467 | { |
| 468 | /* Only change the value of the debug registers. */ |
| 469 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 470 | CHECK (GetThreadContext (th->h, &th->context)); |
| 471 | th->context.Dr0 = dr[0]; |
| 472 | th->context.Dr1 = dr[1]; |
| 473 | th->context.Dr2 = dr[2]; |
| 474 | th->context.Dr3 = dr[3]; |
| 475 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 476 | th->context.Dr7 = dr[7]; |
| 477 | CHECK (SetThreadContext (th->h, &th->context)); |
| 478 | th->context.ContextFlags = 0; |
| 479 | } |
| 480 | return th; |
| 481 | } |
| 482 | |
| 483 | /* Clear out any old thread list and reinitialize it to a |
| 484 | pristine state. */ |
| 485 | static void |
| 486 | windows_init_thread_list (void) |
| 487 | { |
| 488 | windows_thread_info *th = &thread_head; |
| 489 | |
| 490 | DEBUG_EVENTS (("gdb: windows_init_thread_list\n")); |
| 491 | init_thread_list (); |
| 492 | while (th->next != NULL) |
| 493 | { |
| 494 | windows_thread_info *here = th->next; |
| 495 | th->next = here->next; |
| 496 | xfree (here); |
| 497 | } |
| 498 | thread_head.next = NULL; |
| 499 | } |
| 500 | |
| 501 | /* Delete a thread from the list of threads. |
| 502 | |
| 503 | PTID is the ptid of the thread to be deleted. |
| 504 | EXIT_CODE is the thread's exit code. |
| 505 | MAIN_THREAD_P should be true if the thread to be deleted is |
| 506 | the main thread, false otherwise. */ |
| 507 | |
| 508 | static void |
| 509 | windows_delete_thread (ptid_t ptid, DWORD exit_code, bool main_thread_p) |
| 510 | { |
| 511 | windows_thread_info *th; |
| 512 | DWORD id; |
| 513 | |
| 514 | gdb_assert (ptid.tid () != 0); |
| 515 | |
| 516 | id = ptid.tid (); |
| 517 | |
| 518 | /* Emit a notification about the thread being deleted. |
| 519 | |
| 520 | Note that no notification was printed when the main thread |
| 521 | was created, and thus, unless in verbose mode, we should be |
| 522 | symmetrical, and avoid that notification for the main thread |
| 523 | here as well. */ |
| 524 | |
| 525 | if (info_verbose) |
| 526 | printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid).c_str ()); |
| 527 | else if (print_thread_events && !main_thread_p) |
| 528 | printf_unfiltered (_("[%s exited with code %u]\n"), |
| 529 | target_pid_to_str (ptid).c_str (), |
| 530 | (unsigned) exit_code); |
| 531 | |
| 532 | delete_thread (find_thread_ptid (ptid)); |
| 533 | |
| 534 | for (th = &thread_head; |
| 535 | th->next != NULL && th->next->id != id; |
| 536 | th = th->next) |
| 537 | continue; |
| 538 | |
| 539 | if (th->next != NULL) |
| 540 | { |
| 541 | windows_thread_info *here = th->next; |
| 542 | th->next = here->next; |
| 543 | xfree (here->name); |
| 544 | xfree (here); |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | /* Fetches register number R from the given windows_thread_info, |
| 549 | and supplies its value to the given regcache. |
| 550 | |
| 551 | This function assumes that R is non-negative. A failed assertion |
| 552 | is raised if that is not true. |
| 553 | |
| 554 | This function assumes that TH->RELOAD_CONTEXT is not set, meaning |
| 555 | that the windows_thread_info has an up-to-date context. A failed |
| 556 | assertion is raised if that assumption is violated. */ |
| 557 | |
| 558 | static void |
| 559 | windows_fetch_one_register (struct regcache *regcache, |
| 560 | windows_thread_info *th, int r) |
| 561 | { |
| 562 | gdb_assert (r >= 0); |
| 563 | gdb_assert (!th->reload_context); |
| 564 | |
| 565 | char *context_offset = ((char *) &th->context) + mappings[r]; |
| 566 | struct gdbarch *gdbarch = regcache->arch (); |
| 567 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 568 | |
| 569 | if (r == I387_FISEG_REGNUM (tdep)) |
| 570 | { |
| 571 | long l = *((long *) context_offset) & 0xffff; |
| 572 | regcache->raw_supply (r, (char *) &l); |
| 573 | } |
| 574 | else if (r == I387_FOP_REGNUM (tdep)) |
| 575 | { |
| 576 | long l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); |
| 577 | regcache->raw_supply (r, (char *) &l); |
| 578 | } |
| 579 | else if (segment_register_p (r)) |
| 580 | { |
| 581 | /* GDB treats segment registers as 32bit registers, but they are |
| 582 | in fact only 16 bits long. Make sure we do not read extra |
| 583 | bits from our source buffer. */ |
| 584 | long l = *((long *) context_offset) & 0xffff; |
| 585 | regcache->raw_supply (r, (char *) &l); |
| 586 | } |
| 587 | else |
| 588 | regcache->raw_supply (r, context_offset); |
| 589 | } |
| 590 | |
| 591 | void |
| 592 | windows_nat_target::fetch_registers (struct regcache *regcache, int r) |
| 593 | { |
| 594 | DWORD tid = regcache->ptid ().tid (); |
| 595 | windows_thread_info *th = thread_rec (tid, TRUE); |
| 596 | |
| 597 | /* Check if TH exists. Windows sometimes uses a non-existent |
| 598 | thread id in its events. */ |
| 599 | if (th == NULL) |
| 600 | return; |
| 601 | |
| 602 | if (th->reload_context) |
| 603 | { |
| 604 | #ifdef __CYGWIN__ |
| 605 | if (have_saved_context) |
| 606 | { |
| 607 | /* Lie about where the program actually is stopped since |
| 608 | cygwin has informed us that we should consider the signal |
| 609 | to have occurred at another location which is stored in |
| 610 | "saved_context. */ |
| 611 | memcpy (&th->context, &saved_context, |
| 612 | __COPY_CONTEXT_SIZE); |
| 613 | have_saved_context = 0; |
| 614 | } |
| 615 | else |
| 616 | #endif |
| 617 | { |
| 618 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; |
| 619 | CHECK (GetThreadContext (th->h, &th->context)); |
| 620 | /* Copy dr values from that thread. |
| 621 | But only if there were not modified since last stop. |
| 622 | PR gdb/2388 */ |
| 623 | if (!debug_registers_changed) |
| 624 | { |
| 625 | dr[0] = th->context.Dr0; |
| 626 | dr[1] = th->context.Dr1; |
| 627 | dr[2] = th->context.Dr2; |
| 628 | dr[3] = th->context.Dr3; |
| 629 | dr[6] = th->context.Dr6; |
| 630 | dr[7] = th->context.Dr7; |
| 631 | } |
| 632 | } |
| 633 | th->reload_context = 0; |
| 634 | } |
| 635 | |
| 636 | if (r < 0) |
| 637 | for (r = 0; r < gdbarch_num_regs (regcache->arch()); r++) |
| 638 | windows_fetch_one_register (regcache, th, r); |
| 639 | else |
| 640 | windows_fetch_one_register (regcache, th, r); |
| 641 | } |
| 642 | |
| 643 | /* Collect the register number R from the given regcache, and store |
| 644 | its value into the corresponding area of the given thread's context. |
| 645 | |
| 646 | This function assumes that R is non-negative. A failed assertion |
| 647 | assertion is raised if that is not true. */ |
| 648 | |
| 649 | static void |
| 650 | windows_store_one_register (const struct regcache *regcache, |
| 651 | windows_thread_info *th, int r) |
| 652 | { |
| 653 | gdb_assert (r >= 0); |
| 654 | |
| 655 | regcache->raw_collect (r, ((char *) &th->context) + mappings[r]); |
| 656 | } |
| 657 | |
| 658 | /* Store a new register value into the context of the thread tied to |
| 659 | REGCACHE. */ |
| 660 | |
| 661 | void |
| 662 | windows_nat_target::store_registers (struct regcache *regcache, int r) |
| 663 | { |
| 664 | DWORD tid = regcache->ptid ().tid (); |
| 665 | windows_thread_info *th = thread_rec (tid, TRUE); |
| 666 | |
| 667 | /* Check if TH exists. Windows sometimes uses a non-existent |
| 668 | thread id in its events. */ |
| 669 | if (th == NULL) |
| 670 | return; |
| 671 | |
| 672 | if (r < 0) |
| 673 | for (r = 0; r < gdbarch_num_regs (regcache->arch ()); r++) |
| 674 | windows_store_one_register (regcache, th, r); |
| 675 | else |
| 676 | windows_store_one_register (regcache, th, r); |
| 677 | } |
| 678 | |
| 679 | /* Maintain a linked list of "so" information. */ |
| 680 | struct lm_info_windows : public lm_info_base |
| 681 | { |
| 682 | LPVOID load_addr = 0; |
| 683 | }; |
| 684 | |
| 685 | static struct so_list solib_start, *solib_end; |
| 686 | |
| 687 | static struct so_list * |
| 688 | windows_make_so (const char *name, LPVOID load_addr) |
| 689 | { |
| 690 | struct so_list *so; |
| 691 | char *p; |
| 692 | #ifndef __CYGWIN__ |
| 693 | char buf[__PMAX]; |
| 694 | char cwd[__PMAX]; |
| 695 | WIN32_FIND_DATA w32_fd; |
| 696 | HANDLE h = FindFirstFile(name, &w32_fd); |
| 697 | |
| 698 | if (h == INVALID_HANDLE_VALUE) |
| 699 | strcpy (buf, name); |
| 700 | else |
| 701 | { |
| 702 | FindClose (h); |
| 703 | strcpy (buf, name); |
| 704 | if (GetCurrentDirectory (MAX_PATH + 1, cwd)) |
| 705 | { |
| 706 | p = strrchr (buf, '\\'); |
| 707 | if (p) |
| 708 | p[1] = '\0'; |
| 709 | SetCurrentDirectory (buf); |
| 710 | GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p); |
| 711 | SetCurrentDirectory (cwd); |
| 712 | } |
| 713 | } |
| 714 | if (strcasecmp (buf, "ntdll.dll") == 0) |
| 715 | { |
| 716 | GetSystemDirectory (buf, sizeof (buf)); |
| 717 | strcat (buf, "\\ntdll.dll"); |
| 718 | } |
| 719 | #else |
| 720 | cygwin_buf_t buf[__PMAX]; |
| 721 | |
| 722 | buf[0] = 0; |
| 723 | if (access (name, F_OK) != 0) |
| 724 | { |
| 725 | if (strcasecmp (name, "ntdll.dll") == 0) |
| 726 | #ifdef __USEWIDE |
| 727 | { |
| 728 | GetSystemDirectoryW (buf, sizeof (buf) / sizeof (wchar_t)); |
| 729 | wcscat (buf, L"\\ntdll.dll"); |
| 730 | } |
| 731 | #else |
| 732 | { |
| 733 | GetSystemDirectoryA (buf, sizeof (buf) / sizeof (wchar_t)); |
| 734 | strcat (buf, "\\ntdll.dll"); |
| 735 | } |
| 736 | #endif |
| 737 | } |
| 738 | #endif |
| 739 | so = XCNEW (struct so_list); |
| 740 | lm_info_windows *li = new lm_info_windows; |
| 741 | so->lm_info = li; |
| 742 | li->load_addr = load_addr; |
| 743 | strcpy (so->so_original_name, name); |
| 744 | #ifndef __CYGWIN__ |
| 745 | strcpy (so->so_name, buf); |
| 746 | #else |
| 747 | if (buf[0]) |
| 748 | cygwin_conv_path (CCP_WIN_W_TO_POSIX, buf, so->so_name, |
| 749 | SO_NAME_MAX_PATH_SIZE); |
| 750 | else |
| 751 | { |
| 752 | char *rname = realpath (name, NULL); |
| 753 | if (rname && strlen (rname) < SO_NAME_MAX_PATH_SIZE) |
| 754 | { |
| 755 | strcpy (so->so_name, rname); |
| 756 | free (rname); |
| 757 | } |
| 758 | else |
| 759 | error (_("dll path too long")); |
| 760 | } |
| 761 | /* Record cygwin1.dll .text start/end. */ |
| 762 | p = strchr (so->so_name, '\0') - (sizeof ("/cygwin1.dll") - 1); |
| 763 | if (p >= so->so_name && strcasecmp (p, "/cygwin1.dll") == 0) |
| 764 | { |
| 765 | asection *text = NULL; |
| 766 | |
| 767 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (so->so_name, "pei-i386", -1)); |
| 768 | |
| 769 | if (abfd == NULL) |
| 770 | return so; |
| 771 | |
| 772 | if (bfd_check_format (abfd.get (), bfd_object)) |
| 773 | text = bfd_get_section_by_name (abfd.get (), ".text"); |
| 774 | |
| 775 | if (!text) |
| 776 | return so; |
| 777 | |
| 778 | /* The symbols in a dll are offset by 0x1000, which is the |
| 779 | offset from 0 of the first byte in an image - because of the |
| 780 | file header and the section alignment. */ |
| 781 | cygwin_load_start = (CORE_ADDR) (uintptr_t) ((char *) |
| 782 | load_addr + 0x1000); |
| 783 | cygwin_load_end = cygwin_load_start + bfd_section_size (text); |
| 784 | } |
| 785 | #endif |
| 786 | |
| 787 | return so; |
| 788 | } |
| 789 | |
| 790 | static char * |
| 791 | get_image_name (HANDLE h, void *address, int unicode) |
| 792 | { |
| 793 | #ifdef __CYGWIN__ |
| 794 | static char buf[__PMAX]; |
| 795 | #else |
| 796 | static char buf[(2 * __PMAX) + 1]; |
| 797 | #endif |
| 798 | DWORD size = unicode ? sizeof (WCHAR) : sizeof (char); |
| 799 | char *address_ptr; |
| 800 | int len = 0; |
| 801 | char b[2]; |
| 802 | SIZE_T done; |
| 803 | |
| 804 | /* Attempt to read the name of the dll that was detected. |
| 805 | This is documented to work only when actively debugging |
| 806 | a program. It will not work for attached processes. */ |
| 807 | if (address == NULL) |
| 808 | return NULL; |
| 809 | |
| 810 | /* See if we could read the address of a string, and that the |
| 811 | address isn't null. */ |
| 812 | if (!ReadProcessMemory (h, address, &address_ptr, |
| 813 | sizeof (address_ptr), &done) |
| 814 | || done != sizeof (address_ptr) || !address_ptr) |
| 815 | return NULL; |
| 816 | |
| 817 | /* Find the length of the string. */ |
| 818 | while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done) |
| 819 | && (b[0] != 0 || b[size - 1] != 0) && done == size) |
| 820 | continue; |
| 821 | |
| 822 | if (!unicode) |
| 823 | ReadProcessMemory (h, address_ptr, buf, len, &done); |
| 824 | else |
| 825 | { |
| 826 | WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR)); |
| 827 | ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR), |
| 828 | &done); |
| 829 | #ifdef __CYGWIN__ |
| 830 | wcstombs (buf, unicode_address, __PMAX); |
| 831 | #else |
| 832 | WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, sizeof buf, |
| 833 | 0, 0); |
| 834 | #endif |
| 835 | } |
| 836 | |
| 837 | return buf; |
| 838 | } |
| 839 | |
| 840 | /* Handle a DLL load event, and return 1. |
| 841 | |
| 842 | This function assumes that this event did not occur during inferior |
| 843 | initialization, where their event info may be incomplete (see |
| 844 | do_initial_windows_stuff and windows_add_all_dlls for more info |
| 845 | on how we handle DLL loading during that phase). */ |
| 846 | |
| 847 | static void |
| 848 | handle_load_dll () |
| 849 | { |
| 850 | LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; |
| 851 | char *dll_name; |
| 852 | |
| 853 | /* Try getting the DLL name via the lpImageName field of the event. |
| 854 | Note that Microsoft documents this fields as strictly optional, |
| 855 | in the sense that it might be NULL. And the first DLL event in |
| 856 | particular is explicitly documented as "likely not pass[ed]" |
| 857 | (source: MSDN LOAD_DLL_DEBUG_INFO structure). */ |
| 858 | dll_name = get_image_name (current_process_handle, |
| 859 | event->lpImageName, event->fUnicode); |
| 860 | if (!dll_name) |
| 861 | return; |
| 862 | |
| 863 | solib_end->next = windows_make_so (dll_name, event->lpBaseOfDll); |
| 864 | solib_end = solib_end->next; |
| 865 | |
| 866 | lm_info_windows *li = (lm_info_windows *) solib_end->lm_info; |
| 867 | |
| 868 | DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end->so_name, |
| 869 | host_address_to_string (li->load_addr))); |
| 870 | } |
| 871 | |
| 872 | static void |
| 873 | windows_free_so (struct so_list *so) |
| 874 | { |
| 875 | lm_info_windows *li = (lm_info_windows *) so->lm_info; |
| 876 | |
| 877 | delete li; |
| 878 | xfree (so); |
| 879 | } |
| 880 | |
| 881 | /* Handle a DLL unload event. |
| 882 | Return 1 if successful, or zero otherwise. |
| 883 | |
| 884 | This function assumes that this event did not occur during inferior |
| 885 | initialization, where their event info may be incomplete (see |
| 886 | do_initial_windows_stuff and windows_add_all_dlls for more info |
| 887 | on how we handle DLL loading during that phase). */ |
| 888 | |
| 889 | static void |
| 890 | handle_unload_dll () |
| 891 | { |
| 892 | LPVOID lpBaseOfDll = current_event.u.UnloadDll.lpBaseOfDll; |
| 893 | struct so_list *so; |
| 894 | |
| 895 | for (so = &solib_start; so->next != NULL; so = so->next) |
| 896 | { |
| 897 | lm_info_windows *li_next = (lm_info_windows *) so->next->lm_info; |
| 898 | |
| 899 | if (li_next->load_addr == lpBaseOfDll) |
| 900 | { |
| 901 | struct so_list *sodel = so->next; |
| 902 | |
| 903 | so->next = sodel->next; |
| 904 | if (!so->next) |
| 905 | solib_end = so; |
| 906 | DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel->so_name)); |
| 907 | |
| 908 | windows_free_so (sodel); |
| 909 | return; |
| 910 | } |
| 911 | } |
| 912 | |
| 913 | /* We did not find any DLL that was previously loaded at this address, |
| 914 | so register a complaint. We do not report an error, because we have |
| 915 | observed that this may be happening under some circumstances. For |
| 916 | instance, running 32bit applications on x64 Windows causes us to receive |
| 917 | 4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these |
| 918 | events are apparently caused by the WOW layer, the interface between |
| 919 | 32bit and 64bit worlds). */ |
| 920 | complaint (_("dll starting at %s not found."), |
| 921 | host_address_to_string (lpBaseOfDll)); |
| 922 | } |
| 923 | |
| 924 | /* Call FUNC wrapped in a TRY/CATCH that swallows all GDB |
| 925 | exceptions. */ |
| 926 | |
| 927 | static void |
| 928 | catch_errors (void (*func) ()) |
| 929 | { |
| 930 | try |
| 931 | { |
| 932 | func (); |
| 933 | } |
| 934 | catch (const gdb_exception &ex) |
| 935 | { |
| 936 | exception_print (gdb_stderr, ex); |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | /* Clear list of loaded DLLs. */ |
| 941 | static void |
| 942 | windows_clear_solib (void) |
| 943 | { |
| 944 | struct so_list *so; |
| 945 | |
| 946 | for (so = solib_start.next; so; so = solib_start.next) |
| 947 | { |
| 948 | solib_start.next = so->next; |
| 949 | windows_free_so (so); |
| 950 | } |
| 951 | |
| 952 | solib_end = &solib_start; |
| 953 | } |
| 954 | |
| 955 | static void |
| 956 | signal_event_command (const char *args, int from_tty) |
| 957 | { |
| 958 | uintptr_t event_id = 0; |
| 959 | char *endargs = NULL; |
| 960 | |
| 961 | if (args == NULL) |
| 962 | error (_("signal-event requires an argument (integer event id)")); |
| 963 | |
| 964 | event_id = strtoumax (args, &endargs, 10); |
| 965 | |
| 966 | if ((errno == ERANGE) || (event_id == 0) || (event_id > UINTPTR_MAX) || |
| 967 | ((HANDLE) event_id == INVALID_HANDLE_VALUE)) |
| 968 | error (_("Failed to convert `%s' to event id"), args); |
| 969 | |
| 970 | SetEvent ((HANDLE) event_id); |
| 971 | CloseHandle ((HANDLE) event_id); |
| 972 | } |
| 973 | |
| 974 | /* Handle DEBUG_STRING output from child process. |
| 975 | Cygwin prepends its messages with a "cygwin:". Interpret this as |
| 976 | a Cygwin signal. Otherwise just print the string as a warning. */ |
| 977 | static int |
| 978 | handle_output_debug_string (struct target_waitstatus *ourstatus) |
| 979 | { |
| 980 | gdb::unique_xmalloc_ptr<char> s; |
| 981 | int retval = 0; |
| 982 | |
| 983 | if (!target_read_string |
| 984 | ((CORE_ADDR) (uintptr_t) current_event.u.DebugString.lpDebugStringData, |
| 985 | &s, 1024, 0) |
| 986 | || !s || !*(s.get ())) |
| 987 | /* nothing to do */; |
| 988 | else if (!startswith (s.get (), _CYGWIN_SIGNAL_STRING)) |
| 989 | { |
| 990 | #ifdef __CYGWIN__ |
| 991 | if (!startswith (s.get (), "cYg")) |
| 992 | #endif |
| 993 | { |
| 994 | char *p = strchr (s.get (), '\0'); |
| 995 | |
| 996 | if (p > s.get () && *--p == '\n') |
| 997 | *p = '\0'; |
| 998 | warning (("%s"), s.get ()); |
| 999 | } |
| 1000 | } |
| 1001 | #ifdef __CYGWIN__ |
| 1002 | else |
| 1003 | { |
| 1004 | /* Got a cygwin signal marker. A cygwin signal is followed by |
| 1005 | the signal number itself and then optionally followed by the |
| 1006 | thread id and address to saved context within the DLL. If |
| 1007 | these are supplied, then the given thread is assumed to have |
| 1008 | issued the signal and the context from the thread is assumed |
| 1009 | to be stored at the given address in the inferior. Tell gdb |
| 1010 | to treat this like a real signal. */ |
| 1011 | char *p; |
| 1012 | int sig = strtol (s.get () + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0); |
| 1013 | gdb_signal gotasig = gdb_signal_from_host (sig); |
| 1014 | |
| 1015 | ourstatus->value.sig = gotasig; |
| 1016 | if (gotasig) |
| 1017 | { |
| 1018 | LPCVOID x; |
| 1019 | SIZE_T n; |
| 1020 | |
| 1021 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 1022 | retval = strtoul (p, &p, 0); |
| 1023 | if (!retval) |
| 1024 | retval = current_event.dwThreadId; |
| 1025 | else if ((x = (LPCVOID) (uintptr_t) strtoull (p, NULL, 0)) |
| 1026 | && ReadProcessMemory (current_process_handle, x, |
| 1027 | &saved_context, |
| 1028 | __COPY_CONTEXT_SIZE, &n) |
| 1029 | && n == __COPY_CONTEXT_SIZE) |
| 1030 | have_saved_context = 1; |
| 1031 | } |
| 1032 | } |
| 1033 | #endif |
| 1034 | |
| 1035 | return retval; |
| 1036 | } |
| 1037 | |
| 1038 | static int |
| 1039 | display_selector (HANDLE thread, DWORD sel) |
| 1040 | { |
| 1041 | LDT_ENTRY info; |
| 1042 | if (GetThreadSelectorEntry (thread, sel, &info)) |
| 1043 | { |
| 1044 | int base, limit; |
| 1045 | printf_filtered ("0x%03x: ", (unsigned) sel); |
| 1046 | if (!info.HighWord.Bits.Pres) |
| 1047 | { |
| 1048 | puts_filtered ("Segment not present\n"); |
| 1049 | return 0; |
| 1050 | } |
| 1051 | base = (info.HighWord.Bits.BaseHi << 24) + |
| 1052 | (info.HighWord.Bits.BaseMid << 16) |
| 1053 | + info.BaseLow; |
| 1054 | limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow; |
| 1055 | if (info.HighWord.Bits.Granularity) |
| 1056 | limit = (limit << 12) | 0xfff; |
| 1057 | printf_filtered ("base=0x%08x limit=0x%08x", base, limit); |
| 1058 | if (info.HighWord.Bits.Default_Big) |
| 1059 | puts_filtered(" 32-bit "); |
| 1060 | else |
| 1061 | puts_filtered(" 16-bit "); |
| 1062 | switch ((info.HighWord.Bits.Type & 0xf) >> 1) |
| 1063 | { |
| 1064 | case 0: |
| 1065 | puts_filtered ("Data (Read-Only, Exp-up"); |
| 1066 | break; |
| 1067 | case 1: |
| 1068 | puts_filtered ("Data (Read/Write, Exp-up"); |
| 1069 | break; |
| 1070 | case 2: |
| 1071 | puts_filtered ("Unused segment ("); |
| 1072 | break; |
| 1073 | case 3: |
| 1074 | puts_filtered ("Data (Read/Write, Exp-down"); |
| 1075 | break; |
| 1076 | case 4: |
| 1077 | puts_filtered ("Code (Exec-Only, N.Conf"); |
| 1078 | break; |
| 1079 | case 5: |
| 1080 | puts_filtered ("Code (Exec/Read, N.Conf"); |
| 1081 | break; |
| 1082 | case 6: |
| 1083 | puts_filtered ("Code (Exec-Only, Conf"); |
| 1084 | break; |
| 1085 | case 7: |
| 1086 | puts_filtered ("Code (Exec/Read, Conf"); |
| 1087 | break; |
| 1088 | default: |
| 1089 | printf_filtered ("Unknown type 0x%lx", |
| 1090 | (unsigned long) info.HighWord.Bits.Type); |
| 1091 | } |
| 1092 | if ((info.HighWord.Bits.Type & 0x1) == 0) |
| 1093 | puts_filtered(", N.Acc"); |
| 1094 | puts_filtered (")\n"); |
| 1095 | if ((info.HighWord.Bits.Type & 0x10) == 0) |
| 1096 | puts_filtered("System selector "); |
| 1097 | printf_filtered ("Priviledge level = %ld. ", |
| 1098 | (unsigned long) info.HighWord.Bits.Dpl); |
| 1099 | if (info.HighWord.Bits.Granularity) |
| 1100 | puts_filtered ("Page granular.\n"); |
| 1101 | else |
| 1102 | puts_filtered ("Byte granular.\n"); |
| 1103 | return 1; |
| 1104 | } |
| 1105 | else |
| 1106 | { |
| 1107 | DWORD err = GetLastError (); |
| 1108 | if (err == ERROR_NOT_SUPPORTED) |
| 1109 | printf_filtered ("Function not supported\n"); |
| 1110 | else |
| 1111 | printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel); |
| 1112 | return 0; |
| 1113 | } |
| 1114 | } |
| 1115 | |
| 1116 | static void |
| 1117 | display_selectors (const char * args, int from_tty) |
| 1118 | { |
| 1119 | if (!current_thread) |
| 1120 | { |
| 1121 | puts_filtered ("Impossible to display selectors now.\n"); |
| 1122 | return; |
| 1123 | } |
| 1124 | if (!args) |
| 1125 | { |
| 1126 | |
| 1127 | puts_filtered ("Selector $cs\n"); |
| 1128 | display_selector (current_thread->h, |
| 1129 | current_thread->context.SegCs); |
| 1130 | puts_filtered ("Selector $ds\n"); |
| 1131 | display_selector (current_thread->h, |
| 1132 | current_thread->context.SegDs); |
| 1133 | puts_filtered ("Selector $es\n"); |
| 1134 | display_selector (current_thread->h, |
| 1135 | current_thread->context.SegEs); |
| 1136 | puts_filtered ("Selector $ss\n"); |
| 1137 | display_selector (current_thread->h, |
| 1138 | current_thread->context.SegSs); |
| 1139 | puts_filtered ("Selector $fs\n"); |
| 1140 | display_selector (current_thread->h, |
| 1141 | current_thread->context.SegFs); |
| 1142 | puts_filtered ("Selector $gs\n"); |
| 1143 | display_selector (current_thread->h, |
| 1144 | current_thread->context.SegGs); |
| 1145 | } |
| 1146 | else |
| 1147 | { |
| 1148 | int sel; |
| 1149 | sel = parse_and_eval_long (args); |
| 1150 | printf_filtered ("Selector \"%s\"\n",args); |
| 1151 | display_selector (current_thread->h, sel); |
| 1152 | } |
| 1153 | } |
| 1154 | |
| 1155 | #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \ |
| 1156 | printf_unfiltered ("gdb: Target exception %s at %s\n", x, \ |
| 1157 | host_address_to_string (\ |
| 1158 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)) |
| 1159 | |
| 1160 | static handle_exception_result |
| 1161 | handle_exception (struct target_waitstatus *ourstatus) |
| 1162 | { |
| 1163 | EXCEPTION_RECORD *rec = ¤t_event.u.Exception.ExceptionRecord; |
| 1164 | DWORD code = rec->ExceptionCode; |
| 1165 | handle_exception_result result = HANDLE_EXCEPTION_HANDLED; |
| 1166 | |
| 1167 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 1168 | |
| 1169 | /* Record the context of the current thread. */ |
| 1170 | thread_rec (current_event.dwThreadId, -1); |
| 1171 | |
| 1172 | switch (code) |
| 1173 | { |
| 1174 | case EXCEPTION_ACCESS_VIOLATION: |
| 1175 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION"); |
| 1176 | ourstatus->value.sig = GDB_SIGNAL_SEGV; |
| 1177 | #ifdef __CYGWIN__ |
| 1178 | { |
| 1179 | /* See if the access violation happened within the cygwin DLL |
| 1180 | itself. Cygwin uses a kind of exception handling to deal |
| 1181 | with passed-in invalid addresses. gdb should not treat |
| 1182 | these as real SEGVs since they will be silently handled by |
| 1183 | cygwin. A real SEGV will (theoretically) be caught by |
| 1184 | cygwin later in the process and will be sent as a |
| 1185 | cygwin-specific-signal. So, ignore SEGVs if they show up |
| 1186 | within the text segment of the DLL itself. */ |
| 1187 | const char *fn; |
| 1188 | CORE_ADDR addr = (CORE_ADDR) (uintptr_t) rec->ExceptionAddress; |
| 1189 | |
| 1190 | if ((!cygwin_exceptions && (addr >= cygwin_load_start |
| 1191 | && addr < cygwin_load_end)) |
| 1192 | || (find_pc_partial_function (addr, &fn, NULL, NULL) |
| 1193 | && startswith (fn, "KERNEL32!IsBad"))) |
| 1194 | return HANDLE_EXCEPTION_UNHANDLED; |
| 1195 | } |
| 1196 | #endif |
| 1197 | break; |
| 1198 | case STATUS_STACK_OVERFLOW: |
| 1199 | DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW"); |
| 1200 | ourstatus->value.sig = GDB_SIGNAL_SEGV; |
| 1201 | break; |
| 1202 | case STATUS_FLOAT_DENORMAL_OPERAND: |
| 1203 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND"); |
| 1204 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1205 | break; |
| 1206 | case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: |
| 1207 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED"); |
| 1208 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1209 | break; |
| 1210 | case STATUS_FLOAT_INEXACT_RESULT: |
| 1211 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT"); |
| 1212 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1213 | break; |
| 1214 | case STATUS_FLOAT_INVALID_OPERATION: |
| 1215 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION"); |
| 1216 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1217 | break; |
| 1218 | case STATUS_FLOAT_OVERFLOW: |
| 1219 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW"); |
| 1220 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1221 | break; |
| 1222 | case STATUS_FLOAT_STACK_CHECK: |
| 1223 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK"); |
| 1224 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1225 | break; |
| 1226 | case STATUS_FLOAT_UNDERFLOW: |
| 1227 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW"); |
| 1228 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1229 | break; |
| 1230 | case STATUS_FLOAT_DIVIDE_BY_ZERO: |
| 1231 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO"); |
| 1232 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1233 | break; |
| 1234 | case STATUS_INTEGER_DIVIDE_BY_ZERO: |
| 1235 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO"); |
| 1236 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1237 | break; |
| 1238 | case STATUS_INTEGER_OVERFLOW: |
| 1239 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW"); |
| 1240 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1241 | break; |
| 1242 | case EXCEPTION_BREAKPOINT: |
| 1243 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT"); |
| 1244 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1245 | break; |
| 1246 | case DBG_CONTROL_C: |
| 1247 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C"); |
| 1248 | ourstatus->value.sig = GDB_SIGNAL_INT; |
| 1249 | break; |
| 1250 | case DBG_CONTROL_BREAK: |
| 1251 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK"); |
| 1252 | ourstatus->value.sig = GDB_SIGNAL_INT; |
| 1253 | break; |
| 1254 | case EXCEPTION_SINGLE_STEP: |
| 1255 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP"); |
| 1256 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1257 | break; |
| 1258 | case EXCEPTION_ILLEGAL_INSTRUCTION: |
| 1259 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION"); |
| 1260 | ourstatus->value.sig = GDB_SIGNAL_ILL; |
| 1261 | break; |
| 1262 | case EXCEPTION_PRIV_INSTRUCTION: |
| 1263 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION"); |
| 1264 | ourstatus->value.sig = GDB_SIGNAL_ILL; |
| 1265 | break; |
| 1266 | case EXCEPTION_NONCONTINUABLE_EXCEPTION: |
| 1267 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION"); |
| 1268 | ourstatus->value.sig = GDB_SIGNAL_ILL; |
| 1269 | break; |
| 1270 | case MS_VC_EXCEPTION: |
| 1271 | if (rec->NumberParameters >= 3 |
| 1272 | && (rec->ExceptionInformation[0] & 0xffffffff) == 0x1000) |
| 1273 | { |
| 1274 | DWORD named_thread_id; |
| 1275 | windows_thread_info *named_thread; |
| 1276 | CORE_ADDR thread_name_target; |
| 1277 | |
| 1278 | DEBUG_EXCEPTION_SIMPLE ("MS_VC_EXCEPTION"); |
| 1279 | |
| 1280 | thread_name_target = rec->ExceptionInformation[1]; |
| 1281 | named_thread_id = (DWORD) (0xffffffff & rec->ExceptionInformation[2]); |
| 1282 | |
| 1283 | if (named_thread_id == (DWORD) -1) |
| 1284 | named_thread_id = current_event.dwThreadId; |
| 1285 | |
| 1286 | named_thread = thread_rec (named_thread_id, 0); |
| 1287 | if (named_thread != NULL) |
| 1288 | { |
| 1289 | int thread_name_len; |
| 1290 | gdb::unique_xmalloc_ptr<char> thread_name; |
| 1291 | |
| 1292 | thread_name_len = target_read_string (thread_name_target, |
| 1293 | &thread_name, 1025, NULL); |
| 1294 | if (thread_name_len > 0) |
| 1295 | { |
| 1296 | thread_name.get ()[thread_name_len - 1] = '\0'; |
| 1297 | xfree (named_thread->name); |
| 1298 | named_thread->name = thread_name.release (); |
| 1299 | } |
| 1300 | } |
| 1301 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1302 | result = HANDLE_EXCEPTION_IGNORED; |
| 1303 | break; |
| 1304 | } |
| 1305 | /* treat improperly formed exception as unknown */ |
| 1306 | /* FALLTHROUGH */ |
| 1307 | default: |
| 1308 | /* Treat unhandled first chance exceptions specially. */ |
| 1309 | if (current_event.u.Exception.dwFirstChance) |
| 1310 | return HANDLE_EXCEPTION_UNHANDLED; |
| 1311 | printf_unfiltered ("gdb: unknown target exception 0x%08x at %s\n", |
| 1312 | (unsigned) current_event.u.Exception.ExceptionRecord.ExceptionCode, |
| 1313 | host_address_to_string ( |
| 1314 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
| 1315 | ourstatus->value.sig = GDB_SIGNAL_UNKNOWN; |
| 1316 | break; |
| 1317 | } |
| 1318 | exception_count++; |
| 1319 | last_sig = ourstatus->value.sig; |
| 1320 | return result; |
| 1321 | } |
| 1322 | |
| 1323 | /* Resume thread specified by ID, or all artificially suspended |
| 1324 | threads, if we are continuing execution. KILLED non-zero means we |
| 1325 | have killed the inferior, so we should ignore weird errors due to |
| 1326 | threads shutting down. */ |
| 1327 | static BOOL |
| 1328 | windows_continue (DWORD continue_status, int id, int killed) |
| 1329 | { |
| 1330 | windows_thread_info *th; |
| 1331 | BOOL res; |
| 1332 | |
| 1333 | DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=0x%x, %s);\n", |
| 1334 | (unsigned) current_event.dwProcessId, |
| 1335 | (unsigned) current_event.dwThreadId, |
| 1336 | continue_status == DBG_CONTINUE ? |
| 1337 | "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED")); |
| 1338 | |
| 1339 | for (th = &thread_head; (th = th->next) != NULL;) |
| 1340 | if ((id == -1 || id == (int) th->id) |
| 1341 | && th->suspended) |
| 1342 | { |
| 1343 | if (debug_registers_changed) |
| 1344 | { |
| 1345 | th->context.ContextFlags |= CONTEXT_DEBUG_REGISTERS; |
| 1346 | th->context.Dr0 = dr[0]; |
| 1347 | th->context.Dr1 = dr[1]; |
| 1348 | th->context.Dr2 = dr[2]; |
| 1349 | th->context.Dr3 = dr[3]; |
| 1350 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 1351 | th->context.Dr7 = dr[7]; |
| 1352 | } |
| 1353 | if (th->context.ContextFlags) |
| 1354 | { |
| 1355 | DWORD ec = 0; |
| 1356 | |
| 1357 | if (GetExitCodeThread (th->h, &ec) |
| 1358 | && ec == STILL_ACTIVE) |
| 1359 | { |
| 1360 | BOOL status = SetThreadContext (th->h, &th->context); |
| 1361 | |
| 1362 | if (!killed) |
| 1363 | CHECK (status); |
| 1364 | } |
| 1365 | th->context.ContextFlags = 0; |
| 1366 | } |
| 1367 | if (th->suspended > 0) |
| 1368 | (void) ResumeThread (th->h); |
| 1369 | th->suspended = 0; |
| 1370 | } |
| 1371 | |
| 1372 | res = ContinueDebugEvent (current_event.dwProcessId, |
| 1373 | current_event.dwThreadId, |
| 1374 | continue_status); |
| 1375 | |
| 1376 | if (!res) |
| 1377 | error (_("Failed to resume program execution" |
| 1378 | " (ContinueDebugEvent failed, error %u)"), |
| 1379 | (unsigned int) GetLastError ()); |
| 1380 | |
| 1381 | debug_registers_changed = 0; |
| 1382 | return res; |
| 1383 | } |
| 1384 | |
| 1385 | /* Called in pathological case where Windows fails to send a |
| 1386 | CREATE_PROCESS_DEBUG_EVENT after an attach. */ |
| 1387 | static DWORD |
| 1388 | fake_create_process (void) |
| 1389 | { |
| 1390 | current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE, |
| 1391 | current_event.dwProcessId); |
| 1392 | if (current_process_handle != NULL) |
| 1393 | open_process_used = 1; |
| 1394 | else |
| 1395 | { |
| 1396 | error (_("OpenProcess call failed, GetLastError = %u"), |
| 1397 | (unsigned) GetLastError ()); |
| 1398 | /* We can not debug anything in that case. */ |
| 1399 | } |
| 1400 | current_thread |
| 1401 | = windows_add_thread (ptid_t (current_event.dwProcessId, 0, |
| 1402 | current_event.dwThreadId), |
| 1403 | current_event.u.CreateThread.hThread, |
| 1404 | current_event.u.CreateThread.lpThreadLocalBase, |
| 1405 | true /* main_thread_p */); |
| 1406 | return current_event.dwThreadId; |
| 1407 | } |
| 1408 | |
| 1409 | void |
| 1410 | windows_nat_target::resume (ptid_t ptid, int step, enum gdb_signal sig) |
| 1411 | { |
| 1412 | windows_thread_info *th; |
| 1413 | DWORD continue_status = DBG_CONTINUE; |
| 1414 | |
| 1415 | /* A specific PTID means `step only this thread id'. */ |
| 1416 | int resume_all = ptid == minus_one_ptid; |
| 1417 | |
| 1418 | /* If we're continuing all threads, it's the current inferior that |
| 1419 | should be handled specially. */ |
| 1420 | if (resume_all) |
| 1421 | ptid = inferior_ptid; |
| 1422 | |
| 1423 | if (sig != GDB_SIGNAL_0) |
| 1424 | { |
| 1425 | if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) |
| 1426 | { |
| 1427 | DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig)); |
| 1428 | } |
| 1429 | else if (sig == last_sig) |
| 1430 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1431 | else |
| 1432 | #if 0 |
| 1433 | /* This code does not seem to work, because |
| 1434 | the kernel does probably not consider changes in the ExceptionRecord |
| 1435 | structure when passing the exception to the inferior. |
| 1436 | Note that this seems possible in the exception handler itself. */ |
| 1437 | { |
| 1438 | for (const xlate_exception &x : xlate) |
| 1439 | if (x.us == sig) |
| 1440 | { |
| 1441 | current_event.u.Exception.ExceptionRecord.ExceptionCode |
| 1442 | = x.them; |
| 1443 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1444 | break; |
| 1445 | } |
| 1446 | if (continue_status == DBG_CONTINUE) |
| 1447 | { |
| 1448 | DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig)); |
| 1449 | } |
| 1450 | } |
| 1451 | #endif |
| 1452 | DEBUG_EXCEPT(("Can only continue with received signal %d.\n", |
| 1453 | last_sig)); |
| 1454 | } |
| 1455 | |
| 1456 | last_sig = GDB_SIGNAL_0; |
| 1457 | |
| 1458 | DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=0x%x, step=%d, sig=%d);\n", |
| 1459 | ptid.pid (), (unsigned) ptid.tid (), step, sig)); |
| 1460 | |
| 1461 | /* Get context for currently selected thread. */ |
| 1462 | th = thread_rec (inferior_ptid.tid (), FALSE); |
| 1463 | if (th) |
| 1464 | { |
| 1465 | if (step) |
| 1466 | { |
| 1467 | /* Single step by setting t bit. */ |
| 1468 | struct regcache *regcache = get_current_regcache (); |
| 1469 | struct gdbarch *gdbarch = regcache->arch (); |
| 1470 | fetch_registers (regcache, gdbarch_ps_regnum (gdbarch)); |
| 1471 | th->context.EFlags |= FLAG_TRACE_BIT; |
| 1472 | } |
| 1473 | |
| 1474 | if (th->context.ContextFlags) |
| 1475 | { |
| 1476 | if (debug_registers_changed) |
| 1477 | { |
| 1478 | th->context.Dr0 = dr[0]; |
| 1479 | th->context.Dr1 = dr[1]; |
| 1480 | th->context.Dr2 = dr[2]; |
| 1481 | th->context.Dr3 = dr[3]; |
| 1482 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 1483 | th->context.Dr7 = dr[7]; |
| 1484 | } |
| 1485 | CHECK (SetThreadContext (th->h, &th->context)); |
| 1486 | th->context.ContextFlags = 0; |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | /* Allow continuing with the same signal that interrupted us. |
| 1491 | Otherwise complain. */ |
| 1492 | |
| 1493 | if (resume_all) |
| 1494 | windows_continue (continue_status, -1, 0); |
| 1495 | else |
| 1496 | windows_continue (continue_status, ptid.tid (), 0); |
| 1497 | } |
| 1498 | |
| 1499 | /* Ctrl-C handler used when the inferior is not run in the same console. The |
| 1500 | handler is in charge of interrupting the inferior using DebugBreakProcess. |
| 1501 | Note that this function is not available prior to Windows XP. In this case |
| 1502 | we emit a warning. */ |
| 1503 | static BOOL WINAPI |
| 1504 | ctrl_c_handler (DWORD event_type) |
| 1505 | { |
| 1506 | const int attach_flag = current_inferior ()->attach_flag; |
| 1507 | |
| 1508 | /* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */ |
| 1509 | if (event_type != CTRL_C_EVENT && event_type != CTRL_BREAK_EVENT) |
| 1510 | return FALSE; |
| 1511 | |
| 1512 | /* If the inferior and the debugger share the same console, do nothing as |
| 1513 | the inferior has also received the Ctrl-C event. */ |
| 1514 | if (!new_console && !attach_flag) |
| 1515 | return TRUE; |
| 1516 | |
| 1517 | if (!DebugBreakProcess (current_process_handle)) |
| 1518 | warning (_("Could not interrupt program. " |
| 1519 | "Press Ctrl-c in the program console.")); |
| 1520 | |
| 1521 | /* Return true to tell that Ctrl-C has been handled. */ |
| 1522 | return TRUE; |
| 1523 | } |
| 1524 | |
| 1525 | /* Get the next event from the child. Returns a non-zero thread id if the event |
| 1526 | requires handling by WFI (or whatever). */ |
| 1527 | static int |
| 1528 | get_windows_debug_event (struct target_ops *ops, |
| 1529 | int pid, struct target_waitstatus *ourstatus) |
| 1530 | { |
| 1531 | BOOL debug_event; |
| 1532 | DWORD continue_status, event_code; |
| 1533 | windows_thread_info *th; |
| 1534 | static windows_thread_info dummy_thread_info; |
| 1535 | DWORD thread_id = 0; |
| 1536 | |
| 1537 | last_sig = GDB_SIGNAL_0; |
| 1538 | |
| 1539 | if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) |
| 1540 | goto out; |
| 1541 | |
| 1542 | event_count++; |
| 1543 | continue_status = DBG_CONTINUE; |
| 1544 | |
| 1545 | event_code = current_event.dwDebugEventCode; |
| 1546 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| 1547 | th = NULL; |
| 1548 | have_saved_context = 0; |
| 1549 | |
| 1550 | switch (event_code) |
| 1551 | { |
| 1552 | case CREATE_THREAD_DEBUG_EVENT: |
| 1553 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1554 | (unsigned) current_event.dwProcessId, |
| 1555 | (unsigned) current_event.dwThreadId, |
| 1556 | "CREATE_THREAD_DEBUG_EVENT")); |
| 1557 | if (saw_create != 1) |
| 1558 | { |
| 1559 | struct inferior *inf; |
| 1560 | inf = find_inferior_pid (current_event.dwProcessId); |
| 1561 | if (!saw_create && inf->attach_flag) |
| 1562 | { |
| 1563 | /* Kludge around a Windows bug where first event is a create |
| 1564 | thread event. Caused when attached process does not have |
| 1565 | a main thread. */ |
| 1566 | thread_id = fake_create_process (); |
| 1567 | if (thread_id) |
| 1568 | saw_create++; |
| 1569 | } |
| 1570 | break; |
| 1571 | } |
| 1572 | /* Record the existence of this thread. */ |
| 1573 | thread_id = current_event.dwThreadId; |
| 1574 | th = windows_add_thread |
| 1575 | (ptid_t (current_event.dwProcessId, 0, current_event.dwThreadId), |
| 1576 | current_event.u.CreateThread.hThread, |
| 1577 | current_event.u.CreateThread.lpThreadLocalBase, |
| 1578 | false /* main_thread_p */); |
| 1579 | |
| 1580 | break; |
| 1581 | |
| 1582 | case EXIT_THREAD_DEBUG_EVENT: |
| 1583 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1584 | (unsigned) current_event.dwProcessId, |
| 1585 | (unsigned) current_event.dwThreadId, |
| 1586 | "EXIT_THREAD_DEBUG_EVENT")); |
| 1587 | windows_delete_thread (ptid_t (current_event.dwProcessId, 0, |
| 1588 | current_event.dwThreadId), |
| 1589 | current_event.u.ExitThread.dwExitCode, |
| 1590 | false /* main_thread_p */); |
| 1591 | th = &dummy_thread_info; |
| 1592 | break; |
| 1593 | |
| 1594 | case CREATE_PROCESS_DEBUG_EVENT: |
| 1595 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1596 | (unsigned) current_event.dwProcessId, |
| 1597 | (unsigned) current_event.dwThreadId, |
| 1598 | "CREATE_PROCESS_DEBUG_EVENT")); |
| 1599 | CloseHandle (current_event.u.CreateProcessInfo.hFile); |
| 1600 | if (++saw_create != 1) |
| 1601 | break; |
| 1602 | |
| 1603 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; |
| 1604 | /* Add the main thread. */ |
| 1605 | th = windows_add_thread |
| 1606 | (ptid_t (current_event.dwProcessId, 0, |
| 1607 | current_event.dwThreadId), |
| 1608 | current_event.u.CreateProcessInfo.hThread, |
| 1609 | current_event.u.CreateProcessInfo.lpThreadLocalBase, |
| 1610 | true /* main_thread_p */); |
| 1611 | thread_id = current_event.dwThreadId; |
| 1612 | break; |
| 1613 | |
| 1614 | case EXIT_PROCESS_DEBUG_EVENT: |
| 1615 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1616 | (unsigned) current_event.dwProcessId, |
| 1617 | (unsigned) current_event.dwThreadId, |
| 1618 | "EXIT_PROCESS_DEBUG_EVENT")); |
| 1619 | if (!windows_initialization_done) |
| 1620 | { |
| 1621 | target_terminal::ours (); |
| 1622 | target_mourn_inferior (inferior_ptid); |
| 1623 | error (_("During startup program exited with code 0x%x."), |
| 1624 | (unsigned int) current_event.u.ExitProcess.dwExitCode); |
| 1625 | } |
| 1626 | else if (saw_create == 1) |
| 1627 | { |
| 1628 | windows_delete_thread (ptid_t (current_event.dwProcessId, 0, |
| 1629 | current_event.dwThreadId), |
| 1630 | 0, true /* main_thread_p */); |
| 1631 | DWORD exit_status = current_event.u.ExitProcess.dwExitCode; |
| 1632 | /* If the exit status looks like a fatal exception, but we |
| 1633 | don't recognize the exception's code, make the original |
| 1634 | exit status value available, to avoid losing |
| 1635 | information. */ |
| 1636 | int exit_signal |
| 1637 | = WIFSIGNALED (exit_status) ? WTERMSIG (exit_status) : -1; |
| 1638 | if (exit_signal == -1) |
| 1639 | { |
| 1640 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 1641 | ourstatus->value.integer = exit_status; |
| 1642 | } |
| 1643 | else |
| 1644 | { |
| 1645 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
| 1646 | ourstatus->value.sig = gdb_signal_from_host (exit_signal); |
| 1647 | } |
| 1648 | thread_id = current_event.dwThreadId; |
| 1649 | } |
| 1650 | break; |
| 1651 | |
| 1652 | case LOAD_DLL_DEBUG_EVENT: |
| 1653 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1654 | (unsigned) current_event.dwProcessId, |
| 1655 | (unsigned) current_event.dwThreadId, |
| 1656 | "LOAD_DLL_DEBUG_EVENT")); |
| 1657 | CloseHandle (current_event.u.LoadDll.hFile); |
| 1658 | if (saw_create != 1 || ! windows_initialization_done) |
| 1659 | break; |
| 1660 | catch_errors (handle_load_dll); |
| 1661 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1662 | ourstatus->value.integer = 0; |
| 1663 | thread_id = current_event.dwThreadId; |
| 1664 | break; |
| 1665 | |
| 1666 | case UNLOAD_DLL_DEBUG_EVENT: |
| 1667 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1668 | (unsigned) current_event.dwProcessId, |
| 1669 | (unsigned) current_event.dwThreadId, |
| 1670 | "UNLOAD_DLL_DEBUG_EVENT")); |
| 1671 | if (saw_create != 1 || ! windows_initialization_done) |
| 1672 | break; |
| 1673 | catch_errors (handle_unload_dll); |
| 1674 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1675 | ourstatus->value.integer = 0; |
| 1676 | thread_id = current_event.dwThreadId; |
| 1677 | break; |
| 1678 | |
| 1679 | case EXCEPTION_DEBUG_EVENT: |
| 1680 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1681 | (unsigned) current_event.dwProcessId, |
| 1682 | (unsigned) current_event.dwThreadId, |
| 1683 | "EXCEPTION_DEBUG_EVENT")); |
| 1684 | if (saw_create != 1) |
| 1685 | break; |
| 1686 | switch (handle_exception (ourstatus)) |
| 1687 | { |
| 1688 | case HANDLE_EXCEPTION_UNHANDLED: |
| 1689 | default: |
| 1690 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1691 | break; |
| 1692 | case HANDLE_EXCEPTION_HANDLED: |
| 1693 | thread_id = current_event.dwThreadId; |
| 1694 | break; |
| 1695 | case HANDLE_EXCEPTION_IGNORED: |
| 1696 | continue_status = DBG_CONTINUE; |
| 1697 | break; |
| 1698 | } |
| 1699 | break; |
| 1700 | |
| 1701 | case OUTPUT_DEBUG_STRING_EVENT: /* Message from the kernel. */ |
| 1702 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1703 | (unsigned) current_event.dwProcessId, |
| 1704 | (unsigned) current_event.dwThreadId, |
| 1705 | "OUTPUT_DEBUG_STRING_EVENT")); |
| 1706 | if (saw_create != 1) |
| 1707 | break; |
| 1708 | thread_id = handle_output_debug_string (ourstatus); |
| 1709 | break; |
| 1710 | |
| 1711 | default: |
| 1712 | if (saw_create != 1) |
| 1713 | break; |
| 1714 | printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n", |
| 1715 | (unsigned) current_event.dwProcessId, |
| 1716 | (unsigned) current_event.dwThreadId); |
| 1717 | printf_unfiltered (" unknown event code %u\n", |
| 1718 | (unsigned) current_event.dwDebugEventCode); |
| 1719 | break; |
| 1720 | } |
| 1721 | |
| 1722 | if (!thread_id || saw_create != 1) |
| 1723 | { |
| 1724 | CHECK (windows_continue (continue_status, -1, 0)); |
| 1725 | } |
| 1726 | else |
| 1727 | { |
| 1728 | inferior_ptid = ptid_t (current_event.dwProcessId, 0, thread_id); |
| 1729 | current_thread = th; |
| 1730 | if (!current_thread) |
| 1731 | current_thread = thread_rec (thread_id, TRUE); |
| 1732 | } |
| 1733 | |
| 1734 | out: |
| 1735 | return thread_id; |
| 1736 | } |
| 1737 | |
| 1738 | /* Wait for interesting events to occur in the target process. */ |
| 1739 | ptid_t |
| 1740 | windows_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, |
| 1741 | int options) |
| 1742 | { |
| 1743 | int pid = -1; |
| 1744 | |
| 1745 | /* We loop when we get a non-standard exception rather than return |
| 1746 | with a SPURIOUS because resume can try and step or modify things, |
| 1747 | which needs a current_thread->h. But some of these exceptions mark |
| 1748 | the birth or death of threads, which mean that the current thread |
| 1749 | isn't necessarily what you think it is. */ |
| 1750 | |
| 1751 | while (1) |
| 1752 | { |
| 1753 | int retval; |
| 1754 | |
| 1755 | /* If the user presses Ctrl-c while the debugger is waiting |
| 1756 | for an event, he expects the debugger to interrupt his program |
| 1757 | and to get the prompt back. There are two possible situations: |
| 1758 | |
| 1759 | - The debugger and the program do not share the console, in |
| 1760 | which case the Ctrl-c event only reached the debugger. |
| 1761 | In that case, the ctrl_c handler will take care of interrupting |
| 1762 | the inferior. Note that this case is working starting with |
| 1763 | Windows XP. For Windows 2000, Ctrl-C should be pressed in the |
| 1764 | inferior console. |
| 1765 | |
| 1766 | - The debugger and the program share the same console, in which |
| 1767 | case both debugger and inferior will receive the Ctrl-c event. |
| 1768 | In that case the ctrl_c handler will ignore the event, as the |
| 1769 | Ctrl-c event generated inside the inferior will trigger the |
| 1770 | expected debug event. |
| 1771 | |
| 1772 | FIXME: brobecker/2008-05-20: If the inferior receives the |
| 1773 | signal first and the delay until GDB receives that signal |
| 1774 | is sufficiently long, GDB can sometimes receive the SIGINT |
| 1775 | after we have unblocked the CTRL+C handler. This would |
| 1776 | lead to the debugger stopping prematurely while handling |
| 1777 | the new-thread event that comes with the handling of the SIGINT |
| 1778 | inside the inferior, and then stop again immediately when |
| 1779 | the user tries to resume the execution in the inferior. |
| 1780 | This is a classic race that we should try to fix one day. */ |
| 1781 | SetConsoleCtrlHandler (&ctrl_c_handler, TRUE); |
| 1782 | retval = get_windows_debug_event (this, pid, ourstatus); |
| 1783 | SetConsoleCtrlHandler (&ctrl_c_handler, FALSE); |
| 1784 | |
| 1785 | if (retval) |
| 1786 | return ptid_t (current_event.dwProcessId, 0, retval); |
| 1787 | else |
| 1788 | { |
| 1789 | int detach = 0; |
| 1790 | |
| 1791 | if (deprecated_ui_loop_hook != NULL) |
| 1792 | detach = deprecated_ui_loop_hook (0); |
| 1793 | |
| 1794 | if (detach) |
| 1795 | kill (); |
| 1796 | } |
| 1797 | } |
| 1798 | } |
| 1799 | |
| 1800 | /* Iterate over all DLLs currently mapped by our inferior, and |
| 1801 | add them to our list of solibs. */ |
| 1802 | |
| 1803 | static void |
| 1804 | windows_add_all_dlls (void) |
| 1805 | { |
| 1806 | HMODULE dummy_hmodule; |
| 1807 | DWORD cb_needed; |
| 1808 | HMODULE *hmodules; |
| 1809 | int i; |
| 1810 | |
| 1811 | if (EnumProcessModules (current_process_handle, &dummy_hmodule, |
| 1812 | sizeof (HMODULE), &cb_needed) == 0) |
| 1813 | return; |
| 1814 | |
| 1815 | if (cb_needed < 1) |
| 1816 | return; |
| 1817 | |
| 1818 | hmodules = (HMODULE *) alloca (cb_needed); |
| 1819 | if (EnumProcessModules (current_process_handle, hmodules, |
| 1820 | cb_needed, &cb_needed) == 0) |
| 1821 | return; |
| 1822 | |
| 1823 | for (i = 1; i < (int) (cb_needed / sizeof (HMODULE)); i++) |
| 1824 | { |
| 1825 | MODULEINFO mi; |
| 1826 | #ifdef __USEWIDE |
| 1827 | wchar_t dll_name[__PMAX]; |
| 1828 | char name[__PMAX]; |
| 1829 | #else |
| 1830 | char dll_name[__PMAX]; |
| 1831 | char *name; |
| 1832 | #endif |
| 1833 | if (GetModuleInformation (current_process_handle, hmodules[i], |
| 1834 | &mi, sizeof (mi)) == 0) |
| 1835 | continue; |
| 1836 | if (GetModuleFileNameEx (current_process_handle, hmodules[i], |
| 1837 | dll_name, sizeof (dll_name)) == 0) |
| 1838 | continue; |
| 1839 | #ifdef __USEWIDE |
| 1840 | wcstombs (name, dll_name, __PMAX); |
| 1841 | #else |
| 1842 | name = dll_name; |
| 1843 | #endif |
| 1844 | |
| 1845 | solib_end->next = windows_make_so (name, mi.lpBaseOfDll); |
| 1846 | solib_end = solib_end->next; |
| 1847 | } |
| 1848 | } |
| 1849 | |
| 1850 | static void |
| 1851 | do_initial_windows_stuff (struct target_ops *ops, DWORD pid, int attaching) |
| 1852 | { |
| 1853 | int i; |
| 1854 | struct inferior *inf; |
| 1855 | |
| 1856 | last_sig = GDB_SIGNAL_0; |
| 1857 | event_count = 0; |
| 1858 | exception_count = 0; |
| 1859 | open_process_used = 0; |
| 1860 | debug_registers_changed = 0; |
| 1861 | debug_registers_used = 0; |
| 1862 | for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++) |
| 1863 | dr[i] = 0; |
| 1864 | #ifdef __CYGWIN__ |
| 1865 | cygwin_load_start = cygwin_load_end = 0; |
| 1866 | #endif |
| 1867 | current_event.dwProcessId = pid; |
| 1868 | memset (¤t_event, 0, sizeof (current_event)); |
| 1869 | if (!target_is_pushed (ops)) |
| 1870 | push_target (ops); |
| 1871 | disable_breakpoints_in_shlibs (); |
| 1872 | windows_clear_solib (); |
| 1873 | clear_proceed_status (0); |
| 1874 | init_wait_for_inferior (); |
| 1875 | |
| 1876 | inf = current_inferior (); |
| 1877 | inferior_appeared (inf, pid); |
| 1878 | inf->attach_flag = attaching; |
| 1879 | |
| 1880 | /* Make the new process the current inferior, so terminal handling |
| 1881 | can rely on it. When attaching, we don't know about any thread |
| 1882 | id here, but that's OK --- nothing should be referencing the |
| 1883 | current thread until we report an event out of windows_wait. */ |
| 1884 | inferior_ptid = ptid_t (pid); |
| 1885 | |
| 1886 | target_terminal::init (); |
| 1887 | target_terminal::inferior (); |
| 1888 | |
| 1889 | windows_initialization_done = 0; |
| 1890 | |
| 1891 | while (1) |
| 1892 | { |
| 1893 | struct target_waitstatus status; |
| 1894 | |
| 1895 | ops->wait (minus_one_ptid, &status, 0); |
| 1896 | |
| 1897 | /* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread |
| 1898 | events. */ |
| 1899 | if (status.kind != TARGET_WAITKIND_LOADED |
| 1900 | && status.kind != TARGET_WAITKIND_SPURIOUS) |
| 1901 | break; |
| 1902 | |
| 1903 | ops->resume (minus_one_ptid, 0, GDB_SIGNAL_0); |
| 1904 | } |
| 1905 | |
| 1906 | /* Now that the inferior has been started and all DLLs have been mapped, |
| 1907 | we can iterate over all DLLs and load them in. |
| 1908 | |
| 1909 | We avoid doing it any earlier because, on certain versions of Windows, |
| 1910 | LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular, |
| 1911 | we have seen on Windows 8.1 that the ntdll.dll load event does not |
| 1912 | include the DLL name, preventing us from creating an associated SO. |
| 1913 | A possible explanation is that ntdll.dll might be mapped before |
| 1914 | the SO info gets created by the Windows system -- ntdll.dll is |
| 1915 | the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs |
| 1916 | do not seem to suffer from that problem. |
| 1917 | |
| 1918 | Rather than try to work around this sort of issue, it is much |
| 1919 | simpler to just ignore DLL load/unload events during the startup |
| 1920 | phase, and then process them all in one batch now. */ |
| 1921 | windows_add_all_dlls (); |
| 1922 | |
| 1923 | windows_initialization_done = 1; |
| 1924 | return; |
| 1925 | } |
| 1926 | |
| 1927 | /* Try to set or remove a user privilege to the current process. Return -1 |
| 1928 | if that fails, the previous setting of that privilege otherwise. |
| 1929 | |
| 1930 | This code is copied from the Cygwin source code and rearranged to allow |
| 1931 | dynamically loading of the needed symbols from advapi32 which is only |
| 1932 | available on NT/2K/XP. */ |
| 1933 | static int |
| 1934 | set_process_privilege (const char *privilege, BOOL enable) |
| 1935 | { |
| 1936 | HANDLE token_hdl = NULL; |
| 1937 | LUID restore_priv; |
| 1938 | TOKEN_PRIVILEGES new_priv, orig_priv; |
| 1939 | int ret = -1; |
| 1940 | DWORD size; |
| 1941 | |
| 1942 | if (!OpenProcessToken (GetCurrentProcess (), |
| 1943 | TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, |
| 1944 | &token_hdl)) |
| 1945 | goto out; |
| 1946 | |
| 1947 | if (!LookupPrivilegeValueA (NULL, privilege, &restore_priv)) |
| 1948 | goto out; |
| 1949 | |
| 1950 | new_priv.PrivilegeCount = 1; |
| 1951 | new_priv.Privileges[0].Luid = restore_priv; |
| 1952 | new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0; |
| 1953 | |
| 1954 | if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv, |
| 1955 | sizeof orig_priv, &orig_priv, &size)) |
| 1956 | goto out; |
| 1957 | #if 0 |
| 1958 | /* Disabled, otherwise every `attach' in an unprivileged user session |
| 1959 | would raise the "Failed to get SE_DEBUG_NAME privilege" warning in |
| 1960 | windows_attach(). */ |
| 1961 | /* AdjustTokenPrivileges returns TRUE even if the privilege could not |
| 1962 | be enabled. GetLastError () returns an correct error code, though. */ |
| 1963 | if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED) |
| 1964 | goto out; |
| 1965 | #endif |
| 1966 | |
| 1967 | ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0; |
| 1968 | |
| 1969 | out: |
| 1970 | if (token_hdl) |
| 1971 | CloseHandle (token_hdl); |
| 1972 | |
| 1973 | return ret; |
| 1974 | } |
| 1975 | |
| 1976 | /* Attach to process PID, then initialize for debugging it. */ |
| 1977 | |
| 1978 | void |
| 1979 | windows_nat_target::attach (const char *args, int from_tty) |
| 1980 | { |
| 1981 | BOOL ok; |
| 1982 | DWORD pid; |
| 1983 | |
| 1984 | pid = parse_pid_to_attach (args); |
| 1985 | |
| 1986 | if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0) |
| 1987 | { |
| 1988 | printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n"); |
| 1989 | printf_unfiltered ("This can cause attach to " |
| 1990 | "fail on Windows NT/2K/XP\n"); |
| 1991 | } |
| 1992 | |
| 1993 | windows_init_thread_list (); |
| 1994 | ok = DebugActiveProcess (pid); |
| 1995 | saw_create = 0; |
| 1996 | |
| 1997 | #ifdef __CYGWIN__ |
| 1998 | if (!ok) |
| 1999 | { |
| 2000 | /* Try fall back to Cygwin pid. */ |
| 2001 | pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid); |
| 2002 | |
| 2003 | if (pid > 0) |
| 2004 | ok = DebugActiveProcess (pid); |
| 2005 | } |
| 2006 | #endif |
| 2007 | |
| 2008 | if (!ok) |
| 2009 | error (_("Can't attach to process %u (error %u)"), |
| 2010 | (unsigned) pid, (unsigned) GetLastError ()); |
| 2011 | |
| 2012 | DebugSetProcessKillOnExit (FALSE); |
| 2013 | |
| 2014 | if (from_tty) |
| 2015 | { |
| 2016 | const char *exec_file = get_exec_file (0); |
| 2017 | |
| 2018 | if (exec_file) |
| 2019 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, |
| 2020 | target_pid_to_str (ptid_t (pid)).c_str ()); |
| 2021 | else |
| 2022 | printf_unfiltered ("Attaching to %s\n", |
| 2023 | target_pid_to_str (ptid_t (pid)).c_str ()); |
| 2024 | } |
| 2025 | |
| 2026 | do_initial_windows_stuff (this, pid, 1); |
| 2027 | target_terminal::ours (); |
| 2028 | } |
| 2029 | |
| 2030 | void |
| 2031 | windows_nat_target::detach (inferior *inf, int from_tty) |
| 2032 | { |
| 2033 | int detached = 1; |
| 2034 | |
| 2035 | ptid_t ptid = minus_one_ptid; |
| 2036 | resume (ptid, 0, GDB_SIGNAL_0); |
| 2037 | |
| 2038 | if (!DebugActiveProcessStop (current_event.dwProcessId)) |
| 2039 | { |
| 2040 | error (_("Can't detach process %u (error %u)"), |
| 2041 | (unsigned) current_event.dwProcessId, (unsigned) GetLastError ()); |
| 2042 | detached = 0; |
| 2043 | } |
| 2044 | DebugSetProcessKillOnExit (FALSE); |
| 2045 | |
| 2046 | if (detached && from_tty) |
| 2047 | { |
| 2048 | const char *exec_file = get_exec_file (0); |
| 2049 | if (exec_file == 0) |
| 2050 | exec_file = ""; |
| 2051 | printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file, |
| 2052 | (unsigned) current_event.dwProcessId); |
| 2053 | } |
| 2054 | |
| 2055 | x86_cleanup_dregs (); |
| 2056 | inferior_ptid = null_ptid; |
| 2057 | detach_inferior (inf); |
| 2058 | |
| 2059 | maybe_unpush_target (); |
| 2060 | } |
| 2061 | |
| 2062 | /* Try to determine the executable filename. |
| 2063 | |
| 2064 | EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN. |
| 2065 | |
| 2066 | Upon success, the filename is stored inside EXE_NAME_RET, and |
| 2067 | this function returns nonzero. |
| 2068 | |
| 2069 | Otherwise, this function returns zero and the contents of |
| 2070 | EXE_NAME_RET is undefined. */ |
| 2071 | |
| 2072 | static int |
| 2073 | windows_get_exec_module_filename (char *exe_name_ret, size_t exe_name_max_len) |
| 2074 | { |
| 2075 | DWORD len; |
| 2076 | HMODULE dh_buf; |
| 2077 | DWORD cbNeeded; |
| 2078 | |
| 2079 | cbNeeded = 0; |
| 2080 | if (!EnumProcessModules (current_process_handle, &dh_buf, |
| 2081 | sizeof (HMODULE), &cbNeeded) || !cbNeeded) |
| 2082 | return 0; |
| 2083 | |
| 2084 | /* We know the executable is always first in the list of modules, |
| 2085 | which we just fetched. So no need to fetch more. */ |
| 2086 | |
| 2087 | #ifdef __CYGWIN__ |
| 2088 | { |
| 2089 | /* Cygwin prefers that the path be in /x/y/z format, so extract |
| 2090 | the filename into a temporary buffer first, and then convert it |
| 2091 | to POSIX format into the destination buffer. */ |
| 2092 | cygwin_buf_t *pathbuf = (cygwin_buf_t *) alloca (exe_name_max_len * sizeof (cygwin_buf_t)); |
| 2093 | |
| 2094 | len = GetModuleFileNameEx (current_process_handle, |
| 2095 | dh_buf, pathbuf, exe_name_max_len); |
| 2096 | if (len == 0) |
| 2097 | error (_("Error getting executable filename: %u."), |
| 2098 | (unsigned) GetLastError ()); |
| 2099 | if (cygwin_conv_path (CCP_WIN_W_TO_POSIX, pathbuf, exe_name_ret, |
| 2100 | exe_name_max_len) < 0) |
| 2101 | error (_("Error converting executable filename to POSIX: %d."), errno); |
| 2102 | } |
| 2103 | #else |
| 2104 | len = GetModuleFileNameEx (current_process_handle, |
| 2105 | dh_buf, exe_name_ret, exe_name_max_len); |
| 2106 | if (len == 0) |
| 2107 | error (_("Error getting executable filename: %u."), |
| 2108 | (unsigned) GetLastError ()); |
| 2109 | #endif |
| 2110 | |
| 2111 | return 1; /* success */ |
| 2112 | } |
| 2113 | |
| 2114 | /* The pid_to_exec_file target_ops method for this platform. */ |
| 2115 | |
| 2116 | char * |
| 2117 | windows_nat_target::pid_to_exec_file (int pid) |
| 2118 | { |
| 2119 | static char path[__PMAX]; |
| 2120 | #ifdef __CYGWIN__ |
| 2121 | /* Try to find exe name as symlink target of /proc/<pid>/exe. */ |
| 2122 | int nchars; |
| 2123 | char procexe[sizeof ("/proc/4294967295/exe")]; |
| 2124 | |
| 2125 | xsnprintf (procexe, sizeof (procexe), "/proc/%u/exe", pid); |
| 2126 | nchars = readlink (procexe, path, sizeof(path)); |
| 2127 | if (nchars > 0 && nchars < sizeof (path)) |
| 2128 | { |
| 2129 | path[nchars] = '\0'; /* Got it */ |
| 2130 | return path; |
| 2131 | } |
| 2132 | #endif |
| 2133 | |
| 2134 | /* If we get here then either Cygwin is hosed, this isn't a Cygwin version |
| 2135 | of gdb, or we're trying to debug a non-Cygwin windows executable. */ |
| 2136 | if (!windows_get_exec_module_filename (path, sizeof (path))) |
| 2137 | path[0] = '\0'; |
| 2138 | |
| 2139 | return path; |
| 2140 | } |
| 2141 | |
| 2142 | /* Print status information about what we're accessing. */ |
| 2143 | |
| 2144 | void |
| 2145 | windows_nat_target::files_info () |
| 2146 | { |
| 2147 | struct inferior *inf = current_inferior (); |
| 2148 | |
| 2149 | printf_unfiltered ("\tUsing the running image of %s %s.\n", |
| 2150 | inf->attach_flag ? "attached" : "child", |
| 2151 | target_pid_to_str (inferior_ptid).c_str ()); |
| 2152 | } |
| 2153 | |
| 2154 | /* Modify CreateProcess parameters for use of a new separate console. |
| 2155 | Parameters are: |
| 2156 | *FLAGS: DWORD parameter for general process creation flags. |
| 2157 | *SI: STARTUPINFO structure, for which the console window size and |
| 2158 | console buffer size is filled in if GDB is running in a console. |
| 2159 | to create the new console. |
| 2160 | The size of the used font is not available on all versions of |
| 2161 | Windows OS. Furthermore, the current font might not be the default |
| 2162 | font, but this is still better than before. |
| 2163 | If the windows and buffer sizes are computed, |
| 2164 | SI->DWFLAGS is changed so that this information is used |
| 2165 | by CreateProcess function. */ |
| 2166 | |
| 2167 | static void |
| 2168 | windows_set_console_info (STARTUPINFO *si, DWORD *flags) |
| 2169 | { |
| 2170 | HANDLE hconsole = CreateFile ("CONOUT$", GENERIC_READ | GENERIC_WRITE, |
| 2171 | FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0); |
| 2172 | |
| 2173 | if (hconsole != INVALID_HANDLE_VALUE) |
| 2174 | { |
| 2175 | CONSOLE_SCREEN_BUFFER_INFO sbinfo; |
| 2176 | COORD font_size; |
| 2177 | CONSOLE_FONT_INFO cfi; |
| 2178 | |
| 2179 | GetCurrentConsoleFont (hconsole, FALSE, &cfi); |
| 2180 | font_size = GetConsoleFontSize (hconsole, cfi.nFont); |
| 2181 | GetConsoleScreenBufferInfo(hconsole, &sbinfo); |
| 2182 | si->dwXSize = sbinfo.srWindow.Right - sbinfo.srWindow.Left + 1; |
| 2183 | si->dwYSize = sbinfo.srWindow.Bottom - sbinfo.srWindow.Top + 1; |
| 2184 | if (font_size.X) |
| 2185 | si->dwXSize *= font_size.X; |
| 2186 | else |
| 2187 | si->dwXSize *= 8; |
| 2188 | if (font_size.Y) |
| 2189 | si->dwYSize *= font_size.Y; |
| 2190 | else |
| 2191 | si->dwYSize *= 12; |
| 2192 | si->dwXCountChars = sbinfo.dwSize.X; |
| 2193 | si->dwYCountChars = sbinfo.dwSize.Y; |
| 2194 | si->dwFlags |= STARTF_USESIZE | STARTF_USECOUNTCHARS; |
| 2195 | } |
| 2196 | *flags |= CREATE_NEW_CONSOLE; |
| 2197 | } |
| 2198 | |
| 2199 | #ifndef __CYGWIN__ |
| 2200 | /* Function called by qsort to sort environment strings. */ |
| 2201 | |
| 2202 | static int |
| 2203 | envvar_cmp (const void *a, const void *b) |
| 2204 | { |
| 2205 | const char **p = (const char **) a; |
| 2206 | const char **q = (const char **) b; |
| 2207 | return strcasecmp (*p, *q); |
| 2208 | } |
| 2209 | #endif |
| 2210 | |
| 2211 | #ifdef __CYGWIN__ |
| 2212 | static void |
| 2213 | clear_win32_environment (char **env) |
| 2214 | { |
| 2215 | int i; |
| 2216 | size_t len; |
| 2217 | wchar_t *copy = NULL, *equalpos; |
| 2218 | |
| 2219 | for (i = 0; env[i] && *env[i]; i++) |
| 2220 | { |
| 2221 | len = mbstowcs (NULL, env[i], 0) + 1; |
| 2222 | copy = (wchar_t *) xrealloc (copy, len * sizeof (wchar_t)); |
| 2223 | mbstowcs (copy, env[i], len); |
| 2224 | equalpos = wcschr (copy, L'='); |
| 2225 | if (equalpos) |
| 2226 | *equalpos = L'\0'; |
| 2227 | SetEnvironmentVariableW (copy, NULL); |
| 2228 | } |
| 2229 | xfree (copy); |
| 2230 | } |
| 2231 | #endif |
| 2232 | |
| 2233 | #ifndef __CYGWIN__ |
| 2234 | |
| 2235 | /* Redirection of inferior I/O streams for native MS-Windows programs. |
| 2236 | Unlike on Unix, where this is handled by invoking the inferior via |
| 2237 | the shell, on MS-Windows we need to emulate the cmd.exe shell. |
| 2238 | |
| 2239 | The official documentation of the cmd.exe redirection features is here: |
| 2240 | |
| 2241 | http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx |
| 2242 | |
| 2243 | (That page talks about Windows XP, but there's no newer |
| 2244 | documentation, so we assume later versions of cmd.exe didn't change |
| 2245 | anything.) |
| 2246 | |
| 2247 | Caveat: the documentation on that page seems to include a few lies. |
| 2248 | For example, it describes strange constructs 1<&2 and 2<&1, which |
| 2249 | seem to work only when 1>&2 resp. 2>&1 would make sense, and so I |
| 2250 | think the cmd.exe parser of the redirection symbols simply doesn't |
| 2251 | care about the < vs > distinction in these cases. Therefore, the |
| 2252 | supported features are explicitly documented below. |
| 2253 | |
| 2254 | The emulation below aims at supporting all the valid use cases |
| 2255 | supported by cmd.exe, which include: |
| 2256 | |
| 2257 | < FILE redirect standard input from FILE |
| 2258 | 0< FILE redirect standard input from FILE |
| 2259 | <&N redirect standard input from file descriptor N |
| 2260 | 0<&N redirect standard input from file descriptor N |
| 2261 | > FILE redirect standard output to FILE |
| 2262 | >> FILE append standard output to FILE |
| 2263 | 1>> FILE append standard output to FILE |
| 2264 | >&N redirect standard output to file descriptor N |
| 2265 | 1>&N redirect standard output to file descriptor N |
| 2266 | >>&N append standard output to file descriptor N |
| 2267 | 1>>&N append standard output to file descriptor N |
| 2268 | 2> FILE redirect standard error to FILE |
| 2269 | 2>> FILE append standard error to FILE |
| 2270 | 2>&N redirect standard error to file descriptor N |
| 2271 | 2>>&N append standard error to file descriptor N |
| 2272 | |
| 2273 | Note that using N > 2 in the above construct is supported, but |
| 2274 | requires that the corresponding file descriptor be open by some |
| 2275 | means elsewhere or outside GDB. Also note that using ">&0" or |
| 2276 | "<&2" will generally fail, because the file descriptor redirected |
| 2277 | from is normally open in an incompatible mode (e.g., FD 0 is open |
| 2278 | for reading only). IOW, use of such tricks is not recommended; |
| 2279 | you are on your own. |
| 2280 | |
| 2281 | We do NOT support redirection of file descriptors above 2, as in |
| 2282 | "3>SOME-FILE", because MinGW compiled programs don't (supporting |
| 2283 | that needs special handling in the startup code that MinGW |
| 2284 | doesn't have). Pipes are also not supported. |
| 2285 | |
| 2286 | As for invalid use cases, where the redirection contains some |
| 2287 | error, the emulation below will detect that and produce some |
| 2288 | error and/or failure. But the behavior in those cases is not |
| 2289 | bug-for-bug compatible with what cmd.exe does in those cases. |
| 2290 | That's because what cmd.exe does then is not well defined, and |
| 2291 | seems to be a side effect of the cmd.exe parsing of the command |
| 2292 | line more than anything else. For example, try redirecting to an |
| 2293 | invalid file name, as in "> foo:bar". |
| 2294 | |
| 2295 | There are also minor syntactic deviations from what cmd.exe does |
| 2296 | in some corner cases. For example, it doesn't support the likes |
| 2297 | of "> &foo" to mean redirect to file named literally "&foo"; we |
| 2298 | do support that here, because that, too, sounds like some issue |
| 2299 | with the cmd.exe parser. Another nicety is that we support |
| 2300 | redirection targets that use file names with forward slashes, |
| 2301 | something cmd.exe doesn't -- this comes in handy since GDB |
| 2302 | file-name completion can be used when typing the command line for |
| 2303 | the inferior. */ |
| 2304 | |
| 2305 | /* Support routines for redirecting standard handles of the inferior. */ |
| 2306 | |
| 2307 | /* Parse a single redirection spec, open/duplicate the specified |
| 2308 | file/fd, and assign the appropriate value to one of the 3 standard |
| 2309 | file descriptors. */ |
| 2310 | static int |
| 2311 | redir_open (const char *redir_string, int *inp, int *out, int *err) |
| 2312 | { |
| 2313 | int *fd, ref_fd = -2; |
| 2314 | int mode; |
| 2315 | const char *fname = redir_string + 1; |
| 2316 | int rc = *redir_string; |
| 2317 | |
| 2318 | switch (rc) |
| 2319 | { |
| 2320 | case '0': |
| 2321 | fname++; |
| 2322 | /* FALLTHROUGH */ |
| 2323 | case '<': |
| 2324 | fd = inp; |
| 2325 | mode = O_RDONLY; |
| 2326 | break; |
| 2327 | case '1': case '2': |
| 2328 | fname++; |
| 2329 | /* FALLTHROUGH */ |
| 2330 | case '>': |
| 2331 | fd = (rc == '2') ? err : out; |
| 2332 | mode = O_WRONLY | O_CREAT; |
| 2333 | if (*fname == '>') |
| 2334 | { |
| 2335 | fname++; |
| 2336 | mode |= O_APPEND; |
| 2337 | } |
| 2338 | else |
| 2339 | mode |= O_TRUNC; |
| 2340 | break; |
| 2341 | default: |
| 2342 | return -1; |
| 2343 | } |
| 2344 | |
| 2345 | if (*fname == '&' && '0' <= fname[1] && fname[1] <= '9') |
| 2346 | { |
| 2347 | /* A reference to a file descriptor. */ |
| 2348 | char *fdtail; |
| 2349 | ref_fd = (int) strtol (fname + 1, &fdtail, 10); |
| 2350 | if (fdtail > fname + 1 && *fdtail == '\0') |
| 2351 | { |
| 2352 | /* Don't allow redirection when open modes are incompatible. */ |
| 2353 | if ((ref_fd == 0 && (fd == out || fd == err)) |
| 2354 | || ((ref_fd == 1 || ref_fd == 2) && fd == inp)) |
| 2355 | { |
| 2356 | errno = EPERM; |
| 2357 | return -1; |
| 2358 | } |
| 2359 | if (ref_fd == 0) |
| 2360 | ref_fd = *inp; |
| 2361 | else if (ref_fd == 1) |
| 2362 | ref_fd = *out; |
| 2363 | else if (ref_fd == 2) |
| 2364 | ref_fd = *err; |
| 2365 | } |
| 2366 | else |
| 2367 | { |
| 2368 | errno = EBADF; |
| 2369 | return -1; |
| 2370 | } |
| 2371 | } |
| 2372 | else |
| 2373 | fname++; /* skip the separator space */ |
| 2374 | /* If the descriptor is already open, close it. This allows |
| 2375 | multiple specs of redirections for the same stream, which is |
| 2376 | somewhat nonsensical, but still valid and supported by cmd.exe. |
| 2377 | (But cmd.exe only opens a single file in this case, the one |
| 2378 | specified by the last redirection spec on the command line.) */ |
| 2379 | if (*fd >= 0) |
| 2380 | _close (*fd); |
| 2381 | if (ref_fd == -2) |
| 2382 | { |
| 2383 | *fd = _open (fname, mode, _S_IREAD | _S_IWRITE); |
| 2384 | if (*fd < 0) |
| 2385 | return -1; |
| 2386 | } |
| 2387 | else if (ref_fd == -1) |
| 2388 | *fd = -1; /* reset to default destination */ |
| 2389 | else |
| 2390 | { |
| 2391 | *fd = _dup (ref_fd); |
| 2392 | if (*fd < 0) |
| 2393 | return -1; |
| 2394 | } |
| 2395 | /* _open just sets a flag for O_APPEND, which won't be passed to the |
| 2396 | inferior, so we need to actually move the file pointer. */ |
| 2397 | if ((mode & O_APPEND) != 0) |
| 2398 | _lseek (*fd, 0L, SEEK_END); |
| 2399 | return 0; |
| 2400 | } |
| 2401 | |
| 2402 | /* Canonicalize a single redirection spec and set up the corresponding |
| 2403 | file descriptor as specified. */ |
| 2404 | static int |
| 2405 | redir_set_redirection (const char *s, int *inp, int *out, int *err) |
| 2406 | { |
| 2407 | char buf[__PMAX + 2 + 5]; /* extra space for quotes & redirection string */ |
| 2408 | char *d = buf; |
| 2409 | const char *start = s; |
| 2410 | int quote = 0; |
| 2411 | |
| 2412 | *d++ = *s++; /* copy the 1st character, < or > or a digit */ |
| 2413 | if ((*start == '>' || *start == '1' || *start == '2') |
| 2414 | && *s == '>') |
| 2415 | { |
| 2416 | *d++ = *s++; |
| 2417 | if (*s == '>' && *start != '>') |
| 2418 | *d++ = *s++; |
| 2419 | } |
| 2420 | else if (*start == '0' && *s == '<') |
| 2421 | *d++ = *s++; |
| 2422 | /* cmd.exe recognizes "&N" only immediately after the redirection symbol. */ |
| 2423 | if (*s != '&') |
| 2424 | { |
| 2425 | while (isspace (*s)) /* skip whitespace before file name */ |
| 2426 | s++; |
| 2427 | *d++ = ' '; /* separate file name with a single space */ |
| 2428 | } |
| 2429 | |
| 2430 | /* Copy the file name. */ |
| 2431 | while (*s) |
| 2432 | { |
| 2433 | /* Remove quoting characters from the file name in buf[]. */ |
| 2434 | if (*s == '"') /* could support '..' quoting here */ |
| 2435 | { |
| 2436 | if (!quote) |
| 2437 | quote = *s++; |
| 2438 | else if (*s == quote) |
| 2439 | { |
| 2440 | quote = 0; |
| 2441 | s++; |
| 2442 | } |
| 2443 | else |
| 2444 | *d++ = *s++; |
| 2445 | } |
| 2446 | else if (*s == '\\') |
| 2447 | { |
| 2448 | if (s[1] == '"') /* could support '..' here */ |
| 2449 | s++; |
| 2450 | *d++ = *s++; |
| 2451 | } |
| 2452 | else if (isspace (*s) && !quote) |
| 2453 | break; |
| 2454 | else |
| 2455 | *d++ = *s++; |
| 2456 | if (d - buf >= sizeof (buf) - 1) |
| 2457 | { |
| 2458 | errno = ENAMETOOLONG; |
| 2459 | return 0; |
| 2460 | } |
| 2461 | } |
| 2462 | *d = '\0'; |
| 2463 | |
| 2464 | /* Windows doesn't allow redirection characters in file names, so we |
| 2465 | can bail out early if they use them, or if there's no target file |
| 2466 | name after the redirection symbol. */ |
| 2467 | if (d[-1] == '>' || d[-1] == '<') |
| 2468 | { |
| 2469 | errno = ENOENT; |
| 2470 | return 0; |
| 2471 | } |
| 2472 | if (redir_open (buf, inp, out, err) == 0) |
| 2473 | return s - start; |
| 2474 | return 0; |
| 2475 | } |
| 2476 | |
| 2477 | /* Parse the command line for redirection specs and prepare the file |
| 2478 | descriptors for the 3 standard streams accordingly. */ |
| 2479 | static bool |
| 2480 | redirect_inferior_handles (const char *cmd_orig, char *cmd, |
| 2481 | int *inp, int *out, int *err) |
| 2482 | { |
| 2483 | const char *s = cmd_orig; |
| 2484 | char *d = cmd; |
| 2485 | int quote = 0; |
| 2486 | bool retval = false; |
| 2487 | |
| 2488 | while (isspace (*s)) |
| 2489 | *d++ = *s++; |
| 2490 | |
| 2491 | while (*s) |
| 2492 | { |
| 2493 | if (*s == '"') /* could also support '..' quoting here */ |
| 2494 | { |
| 2495 | if (!quote) |
| 2496 | quote = *s; |
| 2497 | else if (*s == quote) |
| 2498 | quote = 0; |
| 2499 | } |
| 2500 | else if (*s == '\\') |
| 2501 | { |
| 2502 | if (s[1] == '"') /* escaped quote char */ |
| 2503 | s++; |
| 2504 | } |
| 2505 | else if (!quote) |
| 2506 | { |
| 2507 | /* Process a single redirection candidate. */ |
| 2508 | if (*s == '<' || *s == '>' |
| 2509 | || ((*s == '1' || *s == '2') && s[1] == '>') |
| 2510 | || (*s == '0' && s[1] == '<')) |
| 2511 | { |
| 2512 | int skip = redir_set_redirection (s, inp, out, err); |
| 2513 | |
| 2514 | if (skip <= 0) |
| 2515 | return false; |
| 2516 | retval = true; |
| 2517 | s += skip; |
| 2518 | } |
| 2519 | } |
| 2520 | if (*s) |
| 2521 | *d++ = *s++; |
| 2522 | } |
| 2523 | *d = '\0'; |
| 2524 | return retval; |
| 2525 | } |
| 2526 | #endif /* !__CYGWIN__ */ |
| 2527 | |
| 2528 | /* Start an inferior windows child process and sets inferior_ptid to its pid. |
| 2529 | EXEC_FILE is the file to run. |
| 2530 | ALLARGS is a string containing the arguments to the program. |
| 2531 | ENV is the environment vector to pass. Errors reported with error(). */ |
| 2532 | |
| 2533 | void |
| 2534 | windows_nat_target::create_inferior (const char *exec_file, |
| 2535 | const std::string &origallargs, |
| 2536 | char **in_env, int from_tty) |
| 2537 | { |
| 2538 | STARTUPINFO si; |
| 2539 | #ifdef __CYGWIN__ |
| 2540 | cygwin_buf_t real_path[__PMAX]; |
| 2541 | cygwin_buf_t shell[__PMAX]; /* Path to shell */ |
| 2542 | cygwin_buf_t infcwd[__PMAX]; |
| 2543 | const char *sh; |
| 2544 | cygwin_buf_t *toexec; |
| 2545 | cygwin_buf_t *cygallargs; |
| 2546 | cygwin_buf_t *args; |
| 2547 | char **old_env = NULL; |
| 2548 | PWCHAR w32_env; |
| 2549 | size_t len; |
| 2550 | int tty; |
| 2551 | int ostdin, ostdout, ostderr; |
| 2552 | #else /* !__CYGWIN__ */ |
| 2553 | char shell[__PMAX]; /* Path to shell */ |
| 2554 | const char *toexec; |
| 2555 | char *args, *allargs_copy; |
| 2556 | size_t args_len, allargs_len; |
| 2557 | int fd_inp = -1, fd_out = -1, fd_err = -1; |
| 2558 | HANDLE tty = INVALID_HANDLE_VALUE; |
| 2559 | bool redirected = false; |
| 2560 | char *w32env; |
| 2561 | char *temp; |
| 2562 | size_t envlen; |
| 2563 | int i; |
| 2564 | size_t envsize; |
| 2565 | char **env; |
| 2566 | #endif /* !__CYGWIN__ */ |
| 2567 | const char *allargs = origallargs.c_str (); |
| 2568 | PROCESS_INFORMATION pi; |
| 2569 | BOOL ret; |
| 2570 | DWORD flags = 0; |
| 2571 | const char *inferior_io_terminal = get_inferior_io_terminal (); |
| 2572 | |
| 2573 | if (!exec_file) |
| 2574 | error (_("No executable specified, use `target exec'.")); |
| 2575 | |
| 2576 | const char *inferior_cwd = get_inferior_cwd (); |
| 2577 | std::string expanded_infcwd; |
| 2578 | if (inferior_cwd != NULL) |
| 2579 | { |
| 2580 | expanded_infcwd = gdb_tilde_expand (inferior_cwd); |
| 2581 | /* Mirror slashes on inferior's cwd. */ |
| 2582 | std::replace (expanded_infcwd.begin (), expanded_infcwd.end (), |
| 2583 | '/', '\\'); |
| 2584 | inferior_cwd = expanded_infcwd.c_str (); |
| 2585 | } |
| 2586 | |
| 2587 | memset (&si, 0, sizeof (si)); |
| 2588 | si.cb = sizeof (si); |
| 2589 | |
| 2590 | if (new_group) |
| 2591 | flags |= CREATE_NEW_PROCESS_GROUP; |
| 2592 | |
| 2593 | if (new_console) |
| 2594 | windows_set_console_info (&si, &flags); |
| 2595 | |
| 2596 | #ifdef __CYGWIN__ |
| 2597 | if (!useshell) |
| 2598 | { |
| 2599 | flags |= DEBUG_ONLY_THIS_PROCESS; |
| 2600 | if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, exec_file, real_path, |
| 2601 | __PMAX * sizeof (cygwin_buf_t)) < 0) |
| 2602 | error (_("Error starting executable: %d"), errno); |
| 2603 | toexec = real_path; |
| 2604 | #ifdef __USEWIDE |
| 2605 | len = mbstowcs (NULL, allargs, 0) + 1; |
| 2606 | if (len == (size_t) -1) |
| 2607 | error (_("Error starting executable: %d"), errno); |
| 2608 | cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t)); |
| 2609 | mbstowcs (cygallargs, allargs, len); |
| 2610 | #else /* !__USEWIDE */ |
| 2611 | cygallargs = allargs; |
| 2612 | #endif |
| 2613 | } |
| 2614 | else |
| 2615 | { |
| 2616 | sh = get_shell (); |
| 2617 | if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, sh, shell, __PMAX) < 0) |
| 2618 | error (_("Error starting executable via shell: %d"), errno); |
| 2619 | #ifdef __USEWIDE |
| 2620 | len = sizeof (L" -c 'exec '") + mbstowcs (NULL, exec_file, 0) |
| 2621 | + mbstowcs (NULL, allargs, 0) + 2; |
| 2622 | cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t)); |
| 2623 | swprintf (cygallargs, len, L" -c 'exec %s %s'", exec_file, allargs); |
| 2624 | #else /* !__USEWIDE */ |
| 2625 | len = (sizeof (" -c 'exec '") + strlen (exec_file) |
| 2626 | + strlen (allargs) + 2); |
| 2627 | cygallargs = (char *) alloca (len); |
| 2628 | xsnprintf (cygallargs, len, " -c 'exec %s %s'", exec_file, allargs); |
| 2629 | #endif /* __USEWIDE */ |
| 2630 | toexec = shell; |
| 2631 | flags |= DEBUG_PROCESS; |
| 2632 | } |
| 2633 | |
| 2634 | if (inferior_cwd != NULL |
| 2635 | && cygwin_conv_path (CCP_POSIX_TO_WIN_W, inferior_cwd, |
| 2636 | infcwd, strlen (inferior_cwd)) < 0) |
| 2637 | error (_("Error converting inferior cwd: %d"), errno); |
| 2638 | |
| 2639 | #ifdef __USEWIDE |
| 2640 | args = (cygwin_buf_t *) alloca ((wcslen (toexec) + wcslen (cygallargs) + 2) |
| 2641 | * sizeof (wchar_t)); |
| 2642 | wcscpy (args, toexec); |
| 2643 | wcscat (args, L" "); |
| 2644 | wcscat (args, cygallargs); |
| 2645 | #else /* !__USEWIDE */ |
| 2646 | args = (cygwin_buf_t *) alloca (strlen (toexec) + strlen (cygallargs) + 2); |
| 2647 | strcpy (args, toexec); |
| 2648 | strcat (args, " "); |
| 2649 | strcat (args, cygallargs); |
| 2650 | #endif /* !__USEWIDE */ |
| 2651 | |
| 2652 | #ifdef CW_CVT_ENV_TO_WINENV |
| 2653 | /* First try to create a direct Win32 copy of the POSIX environment. */ |
| 2654 | w32_env = (PWCHAR) cygwin_internal (CW_CVT_ENV_TO_WINENV, in_env); |
| 2655 | if (w32_env != (PWCHAR) -1) |
| 2656 | flags |= CREATE_UNICODE_ENVIRONMENT; |
| 2657 | else |
| 2658 | /* If that fails, fall back to old method tweaking GDB's environment. */ |
| 2659 | #endif /* CW_CVT_ENV_TO_WINENV */ |
| 2660 | { |
| 2661 | /* Reset all Win32 environment variables to avoid leftover on next run. */ |
| 2662 | clear_win32_environment (environ); |
| 2663 | /* Prepare the environment vars for CreateProcess. */ |
| 2664 | old_env = environ; |
| 2665 | environ = in_env; |
| 2666 | cygwin_internal (CW_SYNC_WINENV); |
| 2667 | w32_env = NULL; |
| 2668 | } |
| 2669 | |
| 2670 | if (!inferior_io_terminal) |
| 2671 | tty = ostdin = ostdout = ostderr = -1; |
| 2672 | else |
| 2673 | { |
| 2674 | tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY); |
| 2675 | if (tty < 0) |
| 2676 | { |
| 2677 | print_sys_errmsg (inferior_io_terminal, errno); |
| 2678 | ostdin = ostdout = ostderr = -1; |
| 2679 | } |
| 2680 | else |
| 2681 | { |
| 2682 | ostdin = dup (0); |
| 2683 | ostdout = dup (1); |
| 2684 | ostderr = dup (2); |
| 2685 | dup2 (tty, 0); |
| 2686 | dup2 (tty, 1); |
| 2687 | dup2 (tty, 2); |
| 2688 | } |
| 2689 | } |
| 2690 | |
| 2691 | windows_init_thread_list (); |
| 2692 | ret = CreateProcess (0, |
| 2693 | args, /* command line */ |
| 2694 | NULL, /* Security */ |
| 2695 | NULL, /* thread */ |
| 2696 | TRUE, /* inherit handles */ |
| 2697 | flags, /* start flags */ |
| 2698 | w32_env, /* environment */ |
| 2699 | inferior_cwd != NULL ? infcwd : NULL, /* current |
| 2700 | directory */ |
| 2701 | &si, |
| 2702 | &pi); |
| 2703 | if (w32_env) |
| 2704 | /* Just free the Win32 environment, if it could be created. */ |
| 2705 | free (w32_env); |
| 2706 | else |
| 2707 | { |
| 2708 | /* Reset all environment variables to avoid leftover on next run. */ |
| 2709 | clear_win32_environment (in_env); |
| 2710 | /* Restore normal GDB environment variables. */ |
| 2711 | environ = old_env; |
| 2712 | cygwin_internal (CW_SYNC_WINENV); |
| 2713 | } |
| 2714 | |
| 2715 | if (tty >= 0) |
| 2716 | { |
| 2717 | ::close (tty); |
| 2718 | dup2 (ostdin, 0); |
| 2719 | dup2 (ostdout, 1); |
| 2720 | dup2 (ostderr, 2); |
| 2721 | ::close (ostdin); |
| 2722 | ::close (ostdout); |
| 2723 | ::close (ostderr); |
| 2724 | } |
| 2725 | #else /* !__CYGWIN__ */ |
| 2726 | allargs_len = strlen (allargs); |
| 2727 | allargs_copy = strcpy ((char *) alloca (allargs_len + 1), allargs); |
| 2728 | if (strpbrk (allargs_copy, "<>") != NULL) |
| 2729 | { |
| 2730 | int e = errno; |
| 2731 | errno = 0; |
| 2732 | redirected = |
| 2733 | redirect_inferior_handles (allargs, allargs_copy, |
| 2734 | &fd_inp, &fd_out, &fd_err); |
| 2735 | if (errno) |
| 2736 | warning (_("Error in redirection: %s."), safe_strerror (errno)); |
| 2737 | else |
| 2738 | errno = e; |
| 2739 | allargs_len = strlen (allargs_copy); |
| 2740 | } |
| 2741 | /* If not all the standard streams are redirected by the command |
| 2742 | line, use inferior_io_terminal for those which aren't. */ |
| 2743 | if (inferior_io_terminal |
| 2744 | && !(fd_inp >= 0 && fd_out >= 0 && fd_err >= 0)) |
| 2745 | { |
| 2746 | SECURITY_ATTRIBUTES sa; |
| 2747 | sa.nLength = sizeof(sa); |
| 2748 | sa.lpSecurityDescriptor = 0; |
| 2749 | sa.bInheritHandle = TRUE; |
| 2750 | tty = CreateFileA (inferior_io_terminal, GENERIC_READ | GENERIC_WRITE, |
| 2751 | 0, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); |
| 2752 | if (tty == INVALID_HANDLE_VALUE) |
| 2753 | warning (_("Warning: Failed to open TTY %s, error %#x."), |
| 2754 | inferior_io_terminal, (unsigned) GetLastError ()); |
| 2755 | } |
| 2756 | if (redirected || tty != INVALID_HANDLE_VALUE) |
| 2757 | { |
| 2758 | if (fd_inp >= 0) |
| 2759 | si.hStdInput = (HANDLE) _get_osfhandle (fd_inp); |
| 2760 | else if (tty != INVALID_HANDLE_VALUE) |
| 2761 | si.hStdInput = tty; |
| 2762 | else |
| 2763 | si.hStdInput = GetStdHandle (STD_INPUT_HANDLE); |
| 2764 | if (fd_out >= 0) |
| 2765 | si.hStdOutput = (HANDLE) _get_osfhandle (fd_out); |
| 2766 | else if (tty != INVALID_HANDLE_VALUE) |
| 2767 | si.hStdOutput = tty; |
| 2768 | else |
| 2769 | si.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); |
| 2770 | if (fd_err >= 0) |
| 2771 | si.hStdError = (HANDLE) _get_osfhandle (fd_err); |
| 2772 | else if (tty != INVALID_HANDLE_VALUE) |
| 2773 | si.hStdError = tty; |
| 2774 | else |
| 2775 | si.hStdError = GetStdHandle (STD_ERROR_HANDLE); |
| 2776 | si.dwFlags |= STARTF_USESTDHANDLES; |
| 2777 | } |
| 2778 | |
| 2779 | toexec = exec_file; |
| 2780 | /* Build the command line, a space-separated list of tokens where |
| 2781 | the first token is the name of the module to be executed. |
| 2782 | To avoid ambiguities introduced by spaces in the module name, |
| 2783 | we quote it. */ |
| 2784 | args_len = strlen (toexec) + 2 /* quotes */ + allargs_len + 2; |
| 2785 | args = (char *) alloca (args_len); |
| 2786 | xsnprintf (args, args_len, "\"%s\" %s", toexec, allargs_copy); |
| 2787 | |
| 2788 | flags |= DEBUG_ONLY_THIS_PROCESS; |
| 2789 | |
| 2790 | /* CreateProcess takes the environment list as a null terminated set of |
| 2791 | strings (i.e. two nulls terminate the list). */ |
| 2792 | |
| 2793 | /* Get total size for env strings. */ |
| 2794 | for (envlen = 0, i = 0; in_env[i] && *in_env[i]; i++) |
| 2795 | envlen += strlen (in_env[i]) + 1; |
| 2796 | |
| 2797 | envsize = sizeof (in_env[0]) * (i + 1); |
| 2798 | env = (char **) alloca (envsize); |
| 2799 | memcpy (env, in_env, envsize); |
| 2800 | /* Windows programs expect the environment block to be sorted. */ |
| 2801 | qsort (env, i, sizeof (char *), envvar_cmp); |
| 2802 | |
| 2803 | w32env = (char *) alloca (envlen + 1); |
| 2804 | |
| 2805 | /* Copy env strings into new buffer. */ |
| 2806 | for (temp = w32env, i = 0; env[i] && *env[i]; i++) |
| 2807 | { |
| 2808 | strcpy (temp, env[i]); |
| 2809 | temp += strlen (temp) + 1; |
| 2810 | } |
| 2811 | |
| 2812 | /* Final nil string to terminate new env. */ |
| 2813 | *temp = 0; |
| 2814 | |
| 2815 | windows_init_thread_list (); |
| 2816 | ret = CreateProcessA (0, |
| 2817 | args, /* command line */ |
| 2818 | NULL, /* Security */ |
| 2819 | NULL, /* thread */ |
| 2820 | TRUE, /* inherit handles */ |
| 2821 | flags, /* start flags */ |
| 2822 | w32env, /* environment */ |
| 2823 | inferior_cwd, /* current directory */ |
| 2824 | &si, |
| 2825 | &pi); |
| 2826 | if (tty != INVALID_HANDLE_VALUE) |
| 2827 | CloseHandle (tty); |
| 2828 | if (fd_inp >= 0) |
| 2829 | _close (fd_inp); |
| 2830 | if (fd_out >= 0) |
| 2831 | _close (fd_out); |
| 2832 | if (fd_err >= 0) |
| 2833 | _close (fd_err); |
| 2834 | #endif /* !__CYGWIN__ */ |
| 2835 | |
| 2836 | if (!ret) |
| 2837 | error (_("Error creating process %s, (error %u)."), |
| 2838 | exec_file, (unsigned) GetLastError ()); |
| 2839 | |
| 2840 | CloseHandle (pi.hThread); |
| 2841 | CloseHandle (pi.hProcess); |
| 2842 | |
| 2843 | if (useshell && shell[0] != '\0') |
| 2844 | saw_create = -1; |
| 2845 | else |
| 2846 | saw_create = 0; |
| 2847 | |
| 2848 | do_initial_windows_stuff (this, pi.dwProcessId, 0); |
| 2849 | |
| 2850 | /* windows_continue (DBG_CONTINUE, -1, 0); */ |
| 2851 | } |
| 2852 | |
| 2853 | void |
| 2854 | windows_nat_target::mourn_inferior () |
| 2855 | { |
| 2856 | (void) windows_continue (DBG_CONTINUE, -1, 0); |
| 2857 | x86_cleanup_dregs(); |
| 2858 | if (open_process_used) |
| 2859 | { |
| 2860 | CHECK (CloseHandle (current_process_handle)); |
| 2861 | open_process_used = 0; |
| 2862 | } |
| 2863 | inf_child_target::mourn_inferior (); |
| 2864 | } |
| 2865 | |
| 2866 | /* Send a SIGINT to the process group. This acts just like the user typed a |
| 2867 | ^C on the controlling terminal. */ |
| 2868 | |
| 2869 | void |
| 2870 | windows_nat_target::interrupt () |
| 2871 | { |
| 2872 | DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n")); |
| 2873 | CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId)); |
| 2874 | registers_changed (); /* refresh register state */ |
| 2875 | } |
| 2876 | |
| 2877 | /* Helper for windows_xfer_partial that handles memory transfers. |
| 2878 | Arguments are like target_xfer_partial. */ |
| 2879 | |
| 2880 | static enum target_xfer_status |
| 2881 | windows_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, |
| 2882 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
| 2883 | { |
| 2884 | SIZE_T done = 0; |
| 2885 | BOOL success; |
| 2886 | DWORD lasterror = 0; |
| 2887 | |
| 2888 | if (writebuf != NULL) |
| 2889 | { |
| 2890 | DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n", |
| 2891 | pulongest (len), core_addr_to_string (memaddr))); |
| 2892 | success = WriteProcessMemory (current_process_handle, |
| 2893 | (LPVOID) (uintptr_t) memaddr, writebuf, |
| 2894 | len, &done); |
| 2895 | if (!success) |
| 2896 | lasterror = GetLastError (); |
| 2897 | FlushInstructionCache (current_process_handle, |
| 2898 | (LPCVOID) (uintptr_t) memaddr, len); |
| 2899 | } |
| 2900 | else |
| 2901 | { |
| 2902 | DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n", |
| 2903 | pulongest (len), core_addr_to_string (memaddr))); |
| 2904 | success = ReadProcessMemory (current_process_handle, |
| 2905 | (LPCVOID) (uintptr_t) memaddr, readbuf, |
| 2906 | len, &done); |
| 2907 | if (!success) |
| 2908 | lasterror = GetLastError (); |
| 2909 | } |
| 2910 | *xfered_len = (ULONGEST) done; |
| 2911 | if (!success && lasterror == ERROR_PARTIAL_COPY && done > 0) |
| 2912 | return TARGET_XFER_OK; |
| 2913 | else |
| 2914 | return success ? TARGET_XFER_OK : TARGET_XFER_E_IO; |
| 2915 | } |
| 2916 | |
| 2917 | void |
| 2918 | windows_nat_target::kill () |
| 2919 | { |
| 2920 | CHECK (TerminateProcess (current_process_handle, 0)); |
| 2921 | |
| 2922 | for (;;) |
| 2923 | { |
| 2924 | if (!windows_continue (DBG_CONTINUE, -1, 1)) |
| 2925 | break; |
| 2926 | if (!WaitForDebugEvent (¤t_event, INFINITE)) |
| 2927 | break; |
| 2928 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) |
| 2929 | break; |
| 2930 | } |
| 2931 | |
| 2932 | target_mourn_inferior (inferior_ptid); /* Or just windows_mourn_inferior? */ |
| 2933 | } |
| 2934 | |
| 2935 | void |
| 2936 | windows_nat_target::close () |
| 2937 | { |
| 2938 | DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n", |
| 2939 | inferior_ptid.pid ())); |
| 2940 | } |
| 2941 | |
| 2942 | /* Convert pid to printable format. */ |
| 2943 | std::string |
| 2944 | windows_nat_target::pid_to_str (ptid_t ptid) |
| 2945 | { |
| 2946 | if (ptid.tid () != 0) |
| 2947 | return string_printf ("Thread %d.0x%lx", ptid.pid (), ptid.tid ()); |
| 2948 | |
| 2949 | return normal_pid_to_str (ptid); |
| 2950 | } |
| 2951 | |
| 2952 | static enum target_xfer_status |
| 2953 | windows_xfer_shared_libraries (struct target_ops *ops, |
| 2954 | enum target_object object, const char *annex, |
| 2955 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 2956 | ULONGEST offset, ULONGEST len, |
| 2957 | ULONGEST *xfered_len) |
| 2958 | { |
| 2959 | struct obstack obstack; |
| 2960 | const char *buf; |
| 2961 | LONGEST len_avail; |
| 2962 | struct so_list *so; |
| 2963 | |
| 2964 | if (writebuf) |
| 2965 | return TARGET_XFER_E_IO; |
| 2966 | |
| 2967 | obstack_init (&obstack); |
| 2968 | obstack_grow_str (&obstack, "<library-list>\n"); |
| 2969 | for (so = solib_start.next; so; so = so->next) |
| 2970 | { |
| 2971 | lm_info_windows *li = (lm_info_windows *) so->lm_info; |
| 2972 | |
| 2973 | windows_xfer_shared_library (so->so_name, (CORE_ADDR) |
| 2974 | (uintptr_t) li->load_addr, |
| 2975 | target_gdbarch (), &obstack); |
| 2976 | } |
| 2977 | obstack_grow_str0 (&obstack, "</library-list>\n"); |
| 2978 | |
| 2979 | buf = (const char *) obstack_finish (&obstack); |
| 2980 | len_avail = strlen (buf); |
| 2981 | if (offset >= len_avail) |
| 2982 | len= 0; |
| 2983 | else |
| 2984 | { |
| 2985 | if (len > len_avail - offset) |
| 2986 | len = len_avail - offset; |
| 2987 | memcpy (readbuf, buf + offset, len); |
| 2988 | } |
| 2989 | |
| 2990 | obstack_free (&obstack, NULL); |
| 2991 | *xfered_len = (ULONGEST) len; |
| 2992 | return len != 0 ? TARGET_XFER_OK : TARGET_XFER_EOF; |
| 2993 | } |
| 2994 | |
| 2995 | enum target_xfer_status |
| 2996 | windows_nat_target::xfer_partial (enum target_object object, |
| 2997 | const char *annex, gdb_byte *readbuf, |
| 2998 | const gdb_byte *writebuf, ULONGEST offset, |
| 2999 | ULONGEST len, ULONGEST *xfered_len) |
| 3000 | { |
| 3001 | switch (object) |
| 3002 | { |
| 3003 | case TARGET_OBJECT_MEMORY: |
| 3004 | return windows_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
| 3005 | |
| 3006 | case TARGET_OBJECT_LIBRARIES: |
| 3007 | return windows_xfer_shared_libraries (this, object, annex, readbuf, |
| 3008 | writebuf, offset, len, xfered_len); |
| 3009 | |
| 3010 | default: |
| 3011 | if (beneath () == NULL) |
| 3012 | { |
| 3013 | /* This can happen when requesting the transfer of unsupported |
| 3014 | objects before a program has been started (and therefore |
| 3015 | with the current_target having no target beneath). */ |
| 3016 | return TARGET_XFER_E_IO; |
| 3017 | } |
| 3018 | return beneath ()->xfer_partial (object, annex, |
| 3019 | readbuf, writebuf, offset, len, |
| 3020 | xfered_len); |
| 3021 | } |
| 3022 | } |
| 3023 | |
| 3024 | /* Provide thread local base, i.e. Thread Information Block address. |
| 3025 | Returns 1 if ptid is found and sets *ADDR to thread_local_base. */ |
| 3026 | |
| 3027 | bool |
| 3028 | windows_nat_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr) |
| 3029 | { |
| 3030 | windows_thread_info *th; |
| 3031 | |
| 3032 | th = thread_rec (ptid.tid (), 0); |
| 3033 | if (th == NULL) |
| 3034 | return false; |
| 3035 | |
| 3036 | if (addr != NULL) |
| 3037 | *addr = th->thread_local_base; |
| 3038 | |
| 3039 | return true; |
| 3040 | } |
| 3041 | |
| 3042 | ptid_t |
| 3043 | windows_nat_target::get_ada_task_ptid (long lwp, long thread) |
| 3044 | { |
| 3045 | return ptid_t (inferior_ptid.pid (), 0, lwp); |
| 3046 | } |
| 3047 | |
| 3048 | /* Implementation of the to_thread_name method. */ |
| 3049 | |
| 3050 | const char * |
| 3051 | windows_nat_target::thread_name (struct thread_info *thr) |
| 3052 | { |
| 3053 | return thread_rec (thr->ptid.tid (), 0)->name; |
| 3054 | } |
| 3055 | |
| 3056 | |
| 3057 | void |
| 3058 | _initialize_windows_nat (void) |
| 3059 | { |
| 3060 | x86_dr_low.set_control = cygwin_set_dr7; |
| 3061 | x86_dr_low.set_addr = cygwin_set_dr; |
| 3062 | x86_dr_low.get_addr = cygwin_get_dr; |
| 3063 | x86_dr_low.get_status = cygwin_get_dr6; |
| 3064 | x86_dr_low.get_control = cygwin_get_dr7; |
| 3065 | |
| 3066 | /* x86_dr_low.debug_register_length field is set by |
| 3067 | calling x86_set_debug_register_length function |
| 3068 | in processor windows specific native file. */ |
| 3069 | |
| 3070 | add_inf_child_target (&the_windows_nat_target); |
| 3071 | |
| 3072 | #ifdef __CYGWIN__ |
| 3073 | cygwin_internal (CW_SET_DOS_FILE_WARNING, 0); |
| 3074 | #endif |
| 3075 | |
| 3076 | add_com ("signal-event", class_run, signal_event_command, _("\ |
| 3077 | Signal a crashed process with event ID, to allow its debugging.\n\ |
| 3078 | This command is needed in support of setting up GDB as JIT debugger on \ |
| 3079 | MS-Windows. The command should be invoked from the GDB command line using \ |
| 3080 | the '-ex' command-line option. The ID of the event that blocks the \ |
| 3081 | crashed process will be supplied by the Windows JIT debugging mechanism.")); |
| 3082 | |
| 3083 | #ifdef __CYGWIN__ |
| 3084 | add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\ |
| 3085 | Set use of shell to start subprocess."), _("\ |
| 3086 | Show use of shell to start subprocess."), NULL, |
| 3087 | NULL, |
| 3088 | NULL, /* FIXME: i18n: */ |
| 3089 | &setlist, &showlist); |
| 3090 | |
| 3091 | add_setshow_boolean_cmd ("cygwin-exceptions", class_support, |
| 3092 | &cygwin_exceptions, _("\ |
| 3093 | Break when an exception is detected in the Cygwin DLL itself."), _("\ |
| 3094 | Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL, |
| 3095 | NULL, |
| 3096 | NULL, /* FIXME: i18n: */ |
| 3097 | &setlist, &showlist); |
| 3098 | #endif |
| 3099 | |
| 3100 | add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\ |
| 3101 | Set creation of new console when creating child process."), _("\ |
| 3102 | Show creation of new console when creating child process."), NULL, |
| 3103 | NULL, |
| 3104 | NULL, /* FIXME: i18n: */ |
| 3105 | &setlist, &showlist); |
| 3106 | |
| 3107 | add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\ |
| 3108 | Set creation of new group when creating child process."), _("\ |
| 3109 | Show creation of new group when creating child process."), NULL, |
| 3110 | NULL, |
| 3111 | NULL, /* FIXME: i18n: */ |
| 3112 | &setlist, &showlist); |
| 3113 | |
| 3114 | add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\ |
| 3115 | Set whether to display execution in child process."), _("\ |
| 3116 | Show whether to display execution in child process."), NULL, |
| 3117 | NULL, |
| 3118 | NULL, /* FIXME: i18n: */ |
| 3119 | &setlist, &showlist); |
| 3120 | |
| 3121 | add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\ |
| 3122 | Set whether to display kernel events in child process."), _("\ |
| 3123 | Show whether to display kernel events in child process."), NULL, |
| 3124 | NULL, |
| 3125 | NULL, /* FIXME: i18n: */ |
| 3126 | &setlist, &showlist); |
| 3127 | |
| 3128 | add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\ |
| 3129 | Set whether to display memory accesses in child process."), _("\ |
| 3130 | Show whether to display memory accesses in child process."), NULL, |
| 3131 | NULL, |
| 3132 | NULL, /* FIXME: i18n: */ |
| 3133 | &setlist, &showlist); |
| 3134 | |
| 3135 | add_setshow_boolean_cmd ("debugexceptions", class_support, |
| 3136 | &debug_exceptions, _("\ |
| 3137 | Set whether to display kernel exceptions in child process."), _("\ |
| 3138 | Show whether to display kernel exceptions in child process."), NULL, |
| 3139 | NULL, |
| 3140 | NULL, /* FIXME: i18n: */ |
| 3141 | &setlist, &showlist); |
| 3142 | |
| 3143 | init_w32_command_list (); |
| 3144 | |
| 3145 | add_cmd ("selector", class_info, display_selectors, |
| 3146 | _("Display selectors infos."), |
| 3147 | &info_w32_cmdlist); |
| 3148 | } |
| 3149 | |
| 3150 | /* Hardware watchpoint support, adapted from go32-nat.c code. */ |
| 3151 | |
| 3152 | /* Pass the address ADDR to the inferior in the I'th debug register. |
| 3153 | Here we just store the address in dr array, the registers will be |
| 3154 | actually set up when windows_continue is called. */ |
| 3155 | static void |
| 3156 | cygwin_set_dr (int i, CORE_ADDR addr) |
| 3157 | { |
| 3158 | if (i < 0 || i > 3) |
| 3159 | internal_error (__FILE__, __LINE__, |
| 3160 | _("Invalid register %d in cygwin_set_dr.\n"), i); |
| 3161 | dr[i] = addr; |
| 3162 | debug_registers_changed = 1; |
| 3163 | debug_registers_used = 1; |
| 3164 | } |
| 3165 | |
| 3166 | /* Pass the value VAL to the inferior in the DR7 debug control |
| 3167 | register. Here we just store the address in D_REGS, the watchpoint |
| 3168 | will be actually set up in windows_wait. */ |
| 3169 | static void |
| 3170 | cygwin_set_dr7 (unsigned long val) |
| 3171 | { |
| 3172 | dr[7] = (CORE_ADDR) val; |
| 3173 | debug_registers_changed = 1; |
| 3174 | debug_registers_used = 1; |
| 3175 | } |
| 3176 | |
| 3177 | /* Get the value of debug register I from the inferior. */ |
| 3178 | |
| 3179 | static CORE_ADDR |
| 3180 | cygwin_get_dr (int i) |
| 3181 | { |
| 3182 | return dr[i]; |
| 3183 | } |
| 3184 | |
| 3185 | /* Get the value of the DR6 debug status register from the inferior. |
| 3186 | Here we just return the value stored in dr[6] |
| 3187 | by the last call to thread_rec for current_event.dwThreadId id. */ |
| 3188 | static unsigned long |
| 3189 | cygwin_get_dr6 (void) |
| 3190 | { |
| 3191 | return (unsigned long) dr[6]; |
| 3192 | } |
| 3193 | |
| 3194 | /* Get the value of the DR7 debug status register from the inferior. |
| 3195 | Here we just return the value stored in dr[7] by the last call to |
| 3196 | thread_rec for current_event.dwThreadId id. */ |
| 3197 | |
| 3198 | static unsigned long |
| 3199 | cygwin_get_dr7 (void) |
| 3200 | { |
| 3201 | return (unsigned long) dr[7]; |
| 3202 | } |
| 3203 | |
| 3204 | /* Determine if the thread referenced by "ptid" is alive |
| 3205 | by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0 |
| 3206 | it means that the thread has died. Otherwise it is assumed to be alive. */ |
| 3207 | |
| 3208 | bool |
| 3209 | windows_nat_target::thread_alive (ptid_t ptid) |
| 3210 | { |
| 3211 | int tid; |
| 3212 | |
| 3213 | gdb_assert (ptid.tid () != 0); |
| 3214 | tid = ptid.tid (); |
| 3215 | |
| 3216 | return WaitForSingleObject (thread_rec (tid, FALSE)->h, 0) != WAIT_OBJECT_0; |
| 3217 | } |
| 3218 | |
| 3219 | void |
| 3220 | _initialize_check_for_gdb_ini (void) |
| 3221 | { |
| 3222 | char *homedir; |
| 3223 | if (inhibit_gdbinit) |
| 3224 | return; |
| 3225 | |
| 3226 | homedir = getenv ("HOME"); |
| 3227 | if (homedir) |
| 3228 | { |
| 3229 | char *p; |
| 3230 | char *oldini = (char *) alloca (strlen (homedir) + |
| 3231 | sizeof ("gdb.ini") + 1); |
| 3232 | strcpy (oldini, homedir); |
| 3233 | p = strchr (oldini, '\0'); |
| 3234 | if (p > oldini && !IS_DIR_SEPARATOR (p[-1])) |
| 3235 | *p++ = '/'; |
| 3236 | strcpy (p, "gdb.ini"); |
| 3237 | if (access (oldini, 0) == 0) |
| 3238 | { |
| 3239 | int len = strlen (oldini); |
| 3240 | char *newini = (char *) alloca (len + 2); |
| 3241 | |
| 3242 | xsnprintf (newini, len + 2, "%.*s.gdbinit", |
| 3243 | (int) (len - (sizeof ("gdb.ini") - 1)), oldini); |
| 3244 | warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini); |
| 3245 | } |
| 3246 | } |
| 3247 | } |
| 3248 | |
| 3249 | /* Define dummy functions which always return error for the rare cases where |
| 3250 | these functions could not be found. */ |
| 3251 | static BOOL WINAPI |
| 3252 | bad_DebugActiveProcessStop (DWORD w) |
| 3253 | { |
| 3254 | return FALSE; |
| 3255 | } |
| 3256 | static BOOL WINAPI |
| 3257 | bad_DebugBreakProcess (HANDLE w) |
| 3258 | { |
| 3259 | return FALSE; |
| 3260 | } |
| 3261 | static BOOL WINAPI |
| 3262 | bad_DebugSetProcessKillOnExit (BOOL w) |
| 3263 | { |
| 3264 | return FALSE; |
| 3265 | } |
| 3266 | static BOOL WINAPI |
| 3267 | bad_EnumProcessModules (HANDLE w, HMODULE *x, DWORD y, LPDWORD z) |
| 3268 | { |
| 3269 | return FALSE; |
| 3270 | } |
| 3271 | |
| 3272 | #ifdef __USEWIDE |
| 3273 | static DWORD WINAPI |
| 3274 | bad_GetModuleFileNameExW (HANDLE w, HMODULE x, LPWSTR y, DWORD z) |
| 3275 | { |
| 3276 | return 0; |
| 3277 | } |
| 3278 | #else |
| 3279 | static DWORD WINAPI |
| 3280 | bad_GetModuleFileNameExA (HANDLE w, HMODULE x, LPSTR y, DWORD z) |
| 3281 | { |
| 3282 | return 0; |
| 3283 | } |
| 3284 | #endif |
| 3285 | |
| 3286 | static BOOL WINAPI |
| 3287 | bad_GetModuleInformation (HANDLE w, HMODULE x, LPMODULEINFO y, DWORD z) |
| 3288 | { |
| 3289 | return FALSE; |
| 3290 | } |
| 3291 | |
| 3292 | static BOOL WINAPI |
| 3293 | bad_OpenProcessToken (HANDLE w, DWORD x, PHANDLE y) |
| 3294 | { |
| 3295 | return FALSE; |
| 3296 | } |
| 3297 | |
| 3298 | static BOOL WINAPI |
| 3299 | bad_GetCurrentConsoleFont (HANDLE w, BOOL bMaxWindow, CONSOLE_FONT_INFO *f) |
| 3300 | { |
| 3301 | f->nFont = 0; |
| 3302 | return 1; |
| 3303 | } |
| 3304 | static COORD WINAPI |
| 3305 | bad_GetConsoleFontSize (HANDLE w, DWORD nFont) |
| 3306 | { |
| 3307 | COORD size; |
| 3308 | size.X = 8; |
| 3309 | size.Y = 12; |
| 3310 | return size; |
| 3311 | } |
| 3312 | |
| 3313 | /* Load any functions which may not be available in ancient versions |
| 3314 | of Windows. */ |
| 3315 | |
| 3316 | void |
| 3317 | _initialize_loadable (void) |
| 3318 | { |
| 3319 | HMODULE hm = NULL; |
| 3320 | |
| 3321 | #define GPA(m, func) \ |
| 3322 | func = (func ## _ftype *) GetProcAddress (m, #func) |
| 3323 | |
| 3324 | hm = LoadLibrary ("kernel32.dll"); |
| 3325 | if (hm) |
| 3326 | { |
| 3327 | GPA (hm, DebugActiveProcessStop); |
| 3328 | GPA (hm, DebugBreakProcess); |
| 3329 | GPA (hm, DebugSetProcessKillOnExit); |
| 3330 | GPA (hm, GetConsoleFontSize); |
| 3331 | GPA (hm, DebugActiveProcessStop); |
| 3332 | GPA (hm, GetCurrentConsoleFont); |
| 3333 | } |
| 3334 | |
| 3335 | /* Set variables to dummy versions of these processes if the function |
| 3336 | wasn't found in kernel32.dll. */ |
| 3337 | if (!DebugBreakProcess) |
| 3338 | DebugBreakProcess = bad_DebugBreakProcess; |
| 3339 | if (!DebugActiveProcessStop || !DebugSetProcessKillOnExit) |
| 3340 | { |
| 3341 | DebugActiveProcessStop = bad_DebugActiveProcessStop; |
| 3342 | DebugSetProcessKillOnExit = bad_DebugSetProcessKillOnExit; |
| 3343 | } |
| 3344 | if (!GetConsoleFontSize) |
| 3345 | GetConsoleFontSize = bad_GetConsoleFontSize; |
| 3346 | if (!GetCurrentConsoleFont) |
| 3347 | GetCurrentConsoleFont = bad_GetCurrentConsoleFont; |
| 3348 | |
| 3349 | /* Load optional functions used for retrieving filename information |
| 3350 | associated with the currently debugged process or its dlls. */ |
| 3351 | hm = LoadLibrary ("psapi.dll"); |
| 3352 | if (hm) |
| 3353 | { |
| 3354 | GPA (hm, EnumProcessModules); |
| 3355 | GPA (hm, GetModuleInformation); |
| 3356 | GetModuleFileNameEx = (GetModuleFileNameEx_ftype *) |
| 3357 | GetProcAddress (hm, GetModuleFileNameEx_name); |
| 3358 | } |
| 3359 | |
| 3360 | if (!EnumProcessModules || !GetModuleInformation || !GetModuleFileNameEx) |
| 3361 | { |
| 3362 | /* Set variables to dummy versions of these processes if the function |
| 3363 | wasn't found in psapi.dll. */ |
| 3364 | EnumProcessModules = bad_EnumProcessModules; |
| 3365 | GetModuleInformation = bad_GetModuleInformation; |
| 3366 | GetModuleFileNameEx = bad_GetModuleFileNameEx; |
| 3367 | /* This will probably fail on Windows 9x/Me. Let the user know |
| 3368 | that we're missing some functionality. */ |
| 3369 | warning(_("\ |
| 3370 | cannot automatically find executable file or library to read symbols.\n\ |
| 3371 | Use \"file\" or \"dll\" command to load executable/libraries directly.")); |
| 3372 | } |
| 3373 | |
| 3374 | hm = LoadLibrary ("advapi32.dll"); |
| 3375 | if (hm) |
| 3376 | { |
| 3377 | GPA (hm, OpenProcessToken); |
| 3378 | GPA (hm, LookupPrivilegeValueA); |
| 3379 | GPA (hm, AdjustTokenPrivileges); |
| 3380 | /* Only need to set one of these since if OpenProcessToken fails nothing |
| 3381 | else is needed. */ |
| 3382 | if (!OpenProcessToken || !LookupPrivilegeValueA |
| 3383 | || !AdjustTokenPrivileges) |
| 3384 | OpenProcessToken = bad_OpenProcessToken; |
| 3385 | } |
| 3386 | |
| 3387 | #undef GPA |
| 3388 | } |