| 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 STATUS_WX86_BREAKPOINT 0x4000001F |
| 74 | #define STATUS_WX86_SINGLE_STEP 0x4000001E |
| 75 | |
| 76 | #define AdjustTokenPrivileges dyn_AdjustTokenPrivileges |
| 77 | #define DebugActiveProcessStop dyn_DebugActiveProcessStop |
| 78 | #define DebugBreakProcess dyn_DebugBreakProcess |
| 79 | #define DebugSetProcessKillOnExit dyn_DebugSetProcessKillOnExit |
| 80 | #define EnumProcessModules dyn_EnumProcessModules |
| 81 | #define EnumProcessModulesEx dyn_EnumProcessModulesEx |
| 82 | #define GetModuleInformation dyn_GetModuleInformation |
| 83 | #define LookupPrivilegeValueA dyn_LookupPrivilegeValueA |
| 84 | #define OpenProcessToken dyn_OpenProcessToken |
| 85 | #define GetConsoleFontSize dyn_GetConsoleFontSize |
| 86 | #define GetCurrentConsoleFont dyn_GetCurrentConsoleFont |
| 87 | #define Wow64SuspendThread dyn_Wow64SuspendThread |
| 88 | #define Wow64GetThreadContext dyn_Wow64GetThreadContext |
| 89 | #define Wow64SetThreadContext dyn_Wow64SetThreadContext |
| 90 | #define Wow64GetThreadSelectorEntry dyn_Wow64GetThreadSelectorEntry |
| 91 | |
| 92 | typedef BOOL WINAPI (AdjustTokenPrivileges_ftype) (HANDLE, BOOL, |
| 93 | PTOKEN_PRIVILEGES, |
| 94 | DWORD, PTOKEN_PRIVILEGES, |
| 95 | PDWORD); |
| 96 | static AdjustTokenPrivileges_ftype *AdjustTokenPrivileges; |
| 97 | |
| 98 | typedef BOOL WINAPI (DebugActiveProcessStop_ftype) (DWORD); |
| 99 | static DebugActiveProcessStop_ftype *DebugActiveProcessStop; |
| 100 | |
| 101 | typedef BOOL WINAPI (DebugBreakProcess_ftype) (HANDLE); |
| 102 | static DebugBreakProcess_ftype *DebugBreakProcess; |
| 103 | |
| 104 | typedef BOOL WINAPI (DebugSetProcessKillOnExit_ftype) (BOOL); |
| 105 | static DebugSetProcessKillOnExit_ftype *DebugSetProcessKillOnExit; |
| 106 | |
| 107 | typedef BOOL WINAPI (EnumProcessModules_ftype) (HANDLE, HMODULE *, DWORD, |
| 108 | LPDWORD); |
| 109 | static EnumProcessModules_ftype *EnumProcessModules; |
| 110 | |
| 111 | #ifdef __x86_64__ |
| 112 | typedef BOOL WINAPI (EnumProcessModulesEx_ftype) (HANDLE, HMODULE *, DWORD, |
| 113 | LPDWORD, DWORD); |
| 114 | static EnumProcessModulesEx_ftype *EnumProcessModulesEx; |
| 115 | #endif |
| 116 | |
| 117 | typedef BOOL WINAPI (GetModuleInformation_ftype) (HANDLE, HMODULE, |
| 118 | LPMODULEINFO, DWORD); |
| 119 | static GetModuleInformation_ftype *GetModuleInformation; |
| 120 | |
| 121 | typedef BOOL WINAPI (LookupPrivilegeValueA_ftype) (LPCSTR, LPCSTR, PLUID); |
| 122 | static LookupPrivilegeValueA_ftype *LookupPrivilegeValueA; |
| 123 | |
| 124 | typedef BOOL WINAPI (OpenProcessToken_ftype) (HANDLE, DWORD, PHANDLE); |
| 125 | static OpenProcessToken_ftype *OpenProcessToken; |
| 126 | |
| 127 | typedef BOOL WINAPI (GetCurrentConsoleFont_ftype) (HANDLE, BOOL, |
| 128 | CONSOLE_FONT_INFO *); |
| 129 | static GetCurrentConsoleFont_ftype *GetCurrentConsoleFont; |
| 130 | |
| 131 | typedef COORD WINAPI (GetConsoleFontSize_ftype) (HANDLE, DWORD); |
| 132 | static GetConsoleFontSize_ftype *GetConsoleFontSize; |
| 133 | |
| 134 | #ifdef __x86_64__ |
| 135 | typedef DWORD WINAPI (Wow64SuspendThread_ftype) (HANDLE); |
| 136 | static Wow64SuspendThread_ftype *Wow64SuspendThread; |
| 137 | |
| 138 | typedef BOOL WINAPI (Wow64GetThreadContext_ftype) (HANDLE, PWOW64_CONTEXT); |
| 139 | static Wow64GetThreadContext_ftype *Wow64GetThreadContext; |
| 140 | |
| 141 | typedef BOOL WINAPI (Wow64SetThreadContext_ftype) (HANDLE, |
| 142 | const WOW64_CONTEXT *); |
| 143 | static Wow64SetThreadContext_ftype *Wow64SetThreadContext; |
| 144 | |
| 145 | typedef BOOL WINAPI (Wow64GetThreadSelectorEntry_ftype) (HANDLE, DWORD, |
| 146 | PLDT_ENTRY); |
| 147 | static Wow64GetThreadSelectorEntry_ftype *Wow64GetThreadSelectorEntry; |
| 148 | #endif |
| 149 | |
| 150 | #undef STARTUPINFO |
| 151 | #undef CreateProcess |
| 152 | #undef GetModuleFileNameEx |
| 153 | |
| 154 | #ifndef __CYGWIN__ |
| 155 | # define __PMAX (MAX_PATH + 1) |
| 156 | typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE, LPSTR, DWORD); |
| 157 | static GetModuleFileNameEx_ftype *GetModuleFileNameEx; |
| 158 | # define STARTUPINFO STARTUPINFOA |
| 159 | # define CreateProcess CreateProcessA |
| 160 | # define GetModuleFileNameEx_name "GetModuleFileNameExA" |
| 161 | # define bad_GetModuleFileNameEx bad_GetModuleFileNameExA |
| 162 | #else |
| 163 | # define __PMAX PATH_MAX |
| 164 | /* The starting and ending address of the cygwin1.dll text segment. */ |
| 165 | static CORE_ADDR cygwin_load_start; |
| 166 | static CORE_ADDR cygwin_load_end; |
| 167 | # define __USEWIDE |
| 168 | typedef wchar_t cygwin_buf_t; |
| 169 | typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE, |
| 170 | LPWSTR, DWORD); |
| 171 | static GetModuleFileNameEx_ftype *GetModuleFileNameEx; |
| 172 | # define STARTUPINFO STARTUPINFOW |
| 173 | # define CreateProcess CreateProcessW |
| 174 | # define GetModuleFileNameEx_name "GetModuleFileNameExW" |
| 175 | # define bad_GetModuleFileNameEx bad_GetModuleFileNameExW |
| 176 | #endif |
| 177 | |
| 178 | static int have_saved_context; /* True if we've saved context from a |
| 179 | cygwin signal. */ |
| 180 | #ifdef __CYGWIN__ |
| 181 | static CONTEXT saved_context; /* Contains the saved context from a |
| 182 | cygwin signal. */ |
| 183 | #endif |
| 184 | |
| 185 | /* If we're not using the old Cygwin header file set, define the |
| 186 | following which never should have been in the generic Win32 API |
| 187 | headers in the first place since they were our own invention... */ |
| 188 | #ifndef _GNU_H_WINDOWS_H |
| 189 | enum |
| 190 | { |
| 191 | FLAG_TRACE_BIT = 0x100, |
| 192 | }; |
| 193 | #endif |
| 194 | |
| 195 | #ifndef CONTEXT_EXTENDED_REGISTERS |
| 196 | /* This macro is only defined on ia32. It only makes sense on this target, |
| 197 | so define it as zero if not already defined. */ |
| 198 | #define CONTEXT_EXTENDED_REGISTERS 0 |
| 199 | #endif |
| 200 | |
| 201 | #define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \ |
| 202 | | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \ |
| 203 | | CONTEXT_EXTENDED_REGISTERS |
| 204 | |
| 205 | static uintptr_t dr[8]; |
| 206 | static int debug_registers_changed; |
| 207 | static int debug_registers_used; |
| 208 | |
| 209 | static int windows_initialization_done; |
| 210 | #define DR6_CLEAR_VALUE 0xffff0ff0 |
| 211 | |
| 212 | /* The exception thrown by a program to tell the debugger the name of |
| 213 | a thread. The exception record contains an ID of a thread and a |
| 214 | name to give it. This exception has no documented name, but MSDN |
| 215 | dubs it "MS_VC_EXCEPTION" in one code example. */ |
| 216 | #define MS_VC_EXCEPTION 0x406d1388 |
| 217 | |
| 218 | typedef enum |
| 219 | { |
| 220 | HANDLE_EXCEPTION_UNHANDLED = 0, |
| 221 | HANDLE_EXCEPTION_HANDLED, |
| 222 | HANDLE_EXCEPTION_IGNORED |
| 223 | } handle_exception_result; |
| 224 | |
| 225 | /* The string sent by cygwin when it processes a signal. |
| 226 | FIXME: This should be in a cygwin include file. */ |
| 227 | #ifndef _CYGWIN_SIGNAL_STRING |
| 228 | #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f" |
| 229 | #endif |
| 230 | |
| 231 | #define CHECK(x) check (x, __FILE__,__LINE__) |
| 232 | #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x |
| 233 | #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x |
| 234 | #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x |
| 235 | #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x |
| 236 | |
| 237 | static void cygwin_set_dr (int i, CORE_ADDR addr); |
| 238 | static void cygwin_set_dr7 (unsigned long val); |
| 239 | static CORE_ADDR cygwin_get_dr (int i); |
| 240 | static unsigned long cygwin_get_dr6 (void); |
| 241 | static unsigned long cygwin_get_dr7 (void); |
| 242 | |
| 243 | static enum gdb_signal last_sig = GDB_SIGNAL_0; |
| 244 | /* Set if a signal was received from the debugged process. */ |
| 245 | |
| 246 | /* Thread information structure used to track information that is |
| 247 | not available in gdb's thread structure. */ |
| 248 | typedef struct windows_thread_info_struct |
| 249 | { |
| 250 | struct windows_thread_info_struct *next; |
| 251 | DWORD id; |
| 252 | HANDLE h; |
| 253 | CORE_ADDR thread_local_base; |
| 254 | char *name; |
| 255 | int suspended; |
| 256 | int reload_context; |
| 257 | union |
| 258 | { |
| 259 | CONTEXT context; |
| 260 | #ifdef __x86_64__ |
| 261 | WOW64_CONTEXT wow64_context; |
| 262 | #endif |
| 263 | }; |
| 264 | } |
| 265 | windows_thread_info; |
| 266 | |
| 267 | static windows_thread_info thread_head; |
| 268 | |
| 269 | /* The process and thread handles for the above context. */ |
| 270 | |
| 271 | static DEBUG_EVENT current_event; /* The current debug event from |
| 272 | WaitForDebugEvent */ |
| 273 | static HANDLE current_process_handle; /* Currently executing process */ |
| 274 | static windows_thread_info *current_thread; /* Info on currently selected thread */ |
| 275 | static EXCEPTION_RECORD siginfo_er; /* Contents of $_siginfo */ |
| 276 | |
| 277 | /* Counts of things. */ |
| 278 | static int exception_count = 0; |
| 279 | static int event_count = 0; |
| 280 | static int saw_create; |
| 281 | static int open_process_used = 0; |
| 282 | #ifdef __x86_64__ |
| 283 | static bool wow64_process = false; |
| 284 | static bool ignore_first_breakpoint = false; |
| 285 | #endif |
| 286 | |
| 287 | /* User options. */ |
| 288 | static bool new_console = false; |
| 289 | #ifdef __CYGWIN__ |
| 290 | static bool cygwin_exceptions = false; |
| 291 | #endif |
| 292 | static bool new_group = true; |
| 293 | static bool debug_exec = false; /* show execution */ |
| 294 | static bool debug_events = false; /* show events from kernel */ |
| 295 | static bool debug_memory = false; /* show target memory accesses */ |
| 296 | static bool debug_exceptions = false; /* show target exceptions */ |
| 297 | static bool useshell = false; /* use shell for subprocesses */ |
| 298 | |
| 299 | /* This vector maps GDB's idea of a register's number into an offset |
| 300 | in the windows exception context vector. |
| 301 | |
| 302 | It also contains the bit mask needed to load the register in question. |
| 303 | |
| 304 | The contents of this table can only be computed by the units |
| 305 | that provide CPU-specific support for Windows native debugging. |
| 306 | These units should set the table by calling |
| 307 | windows_set_context_register_offsets. |
| 308 | |
| 309 | One day we could read a reg, we could inspect the context we |
| 310 | already have loaded, if it doesn't have the bit set that we need, |
| 311 | we read that set of registers in using GetThreadContext. If the |
| 312 | context already contains what we need, we just unpack it. Then to |
| 313 | write a register, first we have to ensure that the context contains |
| 314 | the other regs of the group, and then we copy the info in and set |
| 315 | out bit. */ |
| 316 | |
| 317 | static const int *mappings; |
| 318 | |
| 319 | /* The function to use in order to determine whether a register is |
| 320 | a segment register or not. */ |
| 321 | static segment_register_p_ftype *segment_register_p; |
| 322 | |
| 323 | /* See windows_nat_target::resume to understand why this is commented |
| 324 | out. */ |
| 325 | #if 0 |
| 326 | /* This vector maps the target's idea of an exception (extracted |
| 327 | from the DEBUG_EVENT structure) to GDB's idea. */ |
| 328 | |
| 329 | struct xlate_exception |
| 330 | { |
| 331 | DWORD them; |
| 332 | enum gdb_signal us; |
| 333 | }; |
| 334 | |
| 335 | static const struct xlate_exception xlate[] = |
| 336 | { |
| 337 | {EXCEPTION_ACCESS_VIOLATION, GDB_SIGNAL_SEGV}, |
| 338 | {STATUS_STACK_OVERFLOW, GDB_SIGNAL_SEGV}, |
| 339 | {EXCEPTION_BREAKPOINT, GDB_SIGNAL_TRAP}, |
| 340 | {DBG_CONTROL_C, GDB_SIGNAL_INT}, |
| 341 | {EXCEPTION_SINGLE_STEP, GDB_SIGNAL_TRAP}, |
| 342 | {STATUS_FLOAT_DIVIDE_BY_ZERO, GDB_SIGNAL_FPE} |
| 343 | }; |
| 344 | |
| 345 | #endif /* 0 */ |
| 346 | |
| 347 | struct windows_nat_target final : public x86_nat_target<inf_child_target> |
| 348 | { |
| 349 | void close () override; |
| 350 | |
| 351 | void attach (const char *, int) override; |
| 352 | |
| 353 | bool attach_no_wait () override |
| 354 | { return true; } |
| 355 | |
| 356 | void detach (inferior *, int) override; |
| 357 | |
| 358 | void resume (ptid_t, int , enum gdb_signal) override; |
| 359 | |
| 360 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; |
| 361 | |
| 362 | void fetch_registers (struct regcache *, int) override; |
| 363 | void store_registers (struct regcache *, int) override; |
| 364 | |
| 365 | enum target_xfer_status xfer_partial (enum target_object object, |
| 366 | const char *annex, |
| 367 | gdb_byte *readbuf, |
| 368 | const gdb_byte *writebuf, |
| 369 | ULONGEST offset, ULONGEST len, |
| 370 | ULONGEST *xfered_len) override; |
| 371 | |
| 372 | void files_info () override; |
| 373 | |
| 374 | void kill () override; |
| 375 | |
| 376 | void create_inferior (const char *, const std::string &, |
| 377 | char **, int) override; |
| 378 | |
| 379 | void mourn_inferior () override; |
| 380 | |
| 381 | bool thread_alive (ptid_t ptid) override; |
| 382 | |
| 383 | std::string pid_to_str (ptid_t) override; |
| 384 | |
| 385 | void interrupt () override; |
| 386 | |
| 387 | char *pid_to_exec_file (int pid) override; |
| 388 | |
| 389 | ptid_t get_ada_task_ptid (long lwp, long thread) override; |
| 390 | |
| 391 | bool get_tib_address (ptid_t ptid, CORE_ADDR *addr) override; |
| 392 | |
| 393 | const char *thread_name (struct thread_info *) override; |
| 394 | |
| 395 | int get_windows_debug_event (int pid, struct target_waitstatus *ourstatus); |
| 396 | }; |
| 397 | |
| 398 | static windows_nat_target the_windows_nat_target; |
| 399 | |
| 400 | /* Set the MAPPINGS static global to OFFSETS. |
| 401 | See the description of MAPPINGS for more details. */ |
| 402 | |
| 403 | static void |
| 404 | windows_set_context_register_offsets (const int *offsets) |
| 405 | { |
| 406 | mappings = offsets; |
| 407 | } |
| 408 | |
| 409 | /* Set the function that should be used by this module to determine |
| 410 | whether a given register is a segment register or not. */ |
| 411 | |
| 412 | static void |
| 413 | windows_set_segment_register_p (segment_register_p_ftype *fun) |
| 414 | { |
| 415 | segment_register_p = fun; |
| 416 | } |
| 417 | |
| 418 | static void |
| 419 | check (BOOL ok, const char *file, int line) |
| 420 | { |
| 421 | if (!ok) |
| 422 | printf_filtered ("error return %s:%d was %u\n", file, line, |
| 423 | (unsigned) GetLastError ()); |
| 424 | } |
| 425 | |
| 426 | /* Find a thread record given a thread id. If GET_CONTEXT is not 0, |
| 427 | then also retrieve the context for this thread. If GET_CONTEXT is |
| 428 | negative, then don't suspend the thread. */ |
| 429 | static windows_thread_info * |
| 430 | thread_rec (DWORD id, int get_context) |
| 431 | { |
| 432 | windows_thread_info *th; |
| 433 | |
| 434 | for (th = &thread_head; (th = th->next) != NULL;) |
| 435 | if (th->id == id) |
| 436 | { |
| 437 | if (!th->suspended && get_context) |
| 438 | { |
| 439 | if (get_context > 0 && id != current_event.dwThreadId) |
| 440 | { |
| 441 | if (SuspendThread (th->h) == (DWORD) -1) |
| 442 | { |
| 443 | DWORD err = GetLastError (); |
| 444 | |
| 445 | /* We get Access Denied (5) when trying to suspend |
| 446 | threads that Windows started on behalf of the |
| 447 | debuggee, usually when those threads are just |
| 448 | about to exit. |
| 449 | We can get Invalid Handle (6) if the main thread |
| 450 | has exited. */ |
| 451 | if (err != ERROR_INVALID_HANDLE |
| 452 | && err != ERROR_ACCESS_DENIED) |
| 453 | warning (_("SuspendThread (tid=0x%x) failed." |
| 454 | " (winerr %u)"), |
| 455 | (unsigned) id, (unsigned) err); |
| 456 | th->suspended = -1; |
| 457 | } |
| 458 | else |
| 459 | th->suspended = 1; |
| 460 | } |
| 461 | else if (get_context < 0) |
| 462 | th->suspended = -1; |
| 463 | th->reload_context = 1; |
| 464 | } |
| 465 | return th; |
| 466 | } |
| 467 | |
| 468 | return NULL; |
| 469 | } |
| 470 | |
| 471 | /* Add a thread to the thread list. |
| 472 | |
| 473 | PTID is the ptid of the thread to be added. |
| 474 | H is its Windows handle. |
| 475 | TLB is its thread local base. |
| 476 | MAIN_THREAD_P should be true if the thread to be added is |
| 477 | the main thread, false otherwise. */ |
| 478 | |
| 479 | static windows_thread_info * |
| 480 | windows_add_thread (ptid_t ptid, HANDLE h, void *tlb, bool main_thread_p) |
| 481 | { |
| 482 | windows_thread_info *th; |
| 483 | DWORD id; |
| 484 | |
| 485 | gdb_assert (ptid.tid () != 0); |
| 486 | |
| 487 | id = ptid.tid (); |
| 488 | |
| 489 | if ((th = thread_rec (id, FALSE))) |
| 490 | return th; |
| 491 | |
| 492 | th = XCNEW (windows_thread_info); |
| 493 | th->id = id; |
| 494 | th->h = h; |
| 495 | th->thread_local_base = (CORE_ADDR) (uintptr_t) tlb; |
| 496 | #ifdef __x86_64__ |
| 497 | /* For WOW64 processes, this is actually the pointer to the 64bit TIB, |
| 498 | and the 32bit TIB is exactly 2 pages after it. */ |
| 499 | if (wow64_process) |
| 500 | th->thread_local_base += 0x2000; |
| 501 | #endif |
| 502 | th->next = thread_head.next; |
| 503 | thread_head.next = th; |
| 504 | |
| 505 | /* Add this new thread to the list of threads. |
| 506 | |
| 507 | To be consistent with what's done on other platforms, we add |
| 508 | the main thread silently (in reality, this thread is really |
| 509 | more of a process to the user than a thread). */ |
| 510 | if (main_thread_p) |
| 511 | add_thread_silent (&the_windows_nat_target, ptid); |
| 512 | else |
| 513 | add_thread (&the_windows_nat_target, ptid); |
| 514 | |
| 515 | /* Set the debug registers for the new thread if they are used. */ |
| 516 | if (debug_registers_used) |
| 517 | { |
| 518 | #ifdef __x86_64__ |
| 519 | if (wow64_process) |
| 520 | { |
| 521 | /* Only change the value of the debug registers. */ |
| 522 | th->wow64_context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 523 | CHECK (Wow64GetThreadContext (th->h, &th->wow64_context)); |
| 524 | th->wow64_context.Dr0 = dr[0]; |
| 525 | th->wow64_context.Dr1 = dr[1]; |
| 526 | th->wow64_context.Dr2 = dr[2]; |
| 527 | th->wow64_context.Dr3 = dr[3]; |
| 528 | th->wow64_context.Dr6 = DR6_CLEAR_VALUE; |
| 529 | th->wow64_context.Dr7 = dr[7]; |
| 530 | CHECK (Wow64SetThreadContext (th->h, &th->wow64_context)); |
| 531 | th->wow64_context.ContextFlags = 0; |
| 532 | } |
| 533 | else |
| 534 | #endif |
| 535 | { |
| 536 | /* Only change the value of the debug registers. */ |
| 537 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 538 | CHECK (GetThreadContext (th->h, &th->context)); |
| 539 | th->context.Dr0 = dr[0]; |
| 540 | th->context.Dr1 = dr[1]; |
| 541 | th->context.Dr2 = dr[2]; |
| 542 | th->context.Dr3 = dr[3]; |
| 543 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 544 | th->context.Dr7 = dr[7]; |
| 545 | CHECK (SetThreadContext (th->h, &th->context)); |
| 546 | th->context.ContextFlags = 0; |
| 547 | } |
| 548 | } |
| 549 | return th; |
| 550 | } |
| 551 | |
| 552 | /* Clear out any old thread list and reinitialize it to a |
| 553 | pristine state. */ |
| 554 | static void |
| 555 | windows_init_thread_list (void) |
| 556 | { |
| 557 | windows_thread_info *th = &thread_head; |
| 558 | |
| 559 | DEBUG_EVENTS (("gdb: windows_init_thread_list\n")); |
| 560 | init_thread_list (); |
| 561 | while (th->next != NULL) |
| 562 | { |
| 563 | windows_thread_info *here = th->next; |
| 564 | th->next = here->next; |
| 565 | xfree (here); |
| 566 | } |
| 567 | thread_head.next = NULL; |
| 568 | } |
| 569 | |
| 570 | /* Delete a thread from the list of threads. |
| 571 | |
| 572 | PTID is the ptid of the thread to be deleted. |
| 573 | EXIT_CODE is the thread's exit code. |
| 574 | MAIN_THREAD_P should be true if the thread to be deleted is |
| 575 | the main thread, false otherwise. */ |
| 576 | |
| 577 | static void |
| 578 | windows_delete_thread (ptid_t ptid, DWORD exit_code, bool main_thread_p) |
| 579 | { |
| 580 | windows_thread_info *th; |
| 581 | DWORD id; |
| 582 | |
| 583 | gdb_assert (ptid.tid () != 0); |
| 584 | |
| 585 | id = ptid.tid (); |
| 586 | |
| 587 | /* Emit a notification about the thread being deleted. |
| 588 | |
| 589 | Note that no notification was printed when the main thread |
| 590 | was created, and thus, unless in verbose mode, we should be |
| 591 | symmetrical, and avoid that notification for the main thread |
| 592 | here as well. */ |
| 593 | |
| 594 | if (info_verbose) |
| 595 | printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid).c_str ()); |
| 596 | else if (print_thread_events && !main_thread_p) |
| 597 | printf_unfiltered (_("[%s exited with code %u]\n"), |
| 598 | target_pid_to_str (ptid).c_str (), |
| 599 | (unsigned) exit_code); |
| 600 | |
| 601 | delete_thread (find_thread_ptid (&the_windows_nat_target, ptid)); |
| 602 | |
| 603 | for (th = &thread_head; |
| 604 | th->next != NULL && th->next->id != id; |
| 605 | th = th->next) |
| 606 | continue; |
| 607 | |
| 608 | if (th->next != NULL) |
| 609 | { |
| 610 | windows_thread_info *here = th->next; |
| 611 | th->next = here->next; |
| 612 | xfree (here->name); |
| 613 | xfree (here); |
| 614 | } |
| 615 | } |
| 616 | |
| 617 | /* Fetches register number R from the given windows_thread_info, |
| 618 | and supplies its value to the given regcache. |
| 619 | |
| 620 | This function assumes that R is non-negative. A failed assertion |
| 621 | is raised if that is not true. |
| 622 | |
| 623 | This function assumes that TH->RELOAD_CONTEXT is not set, meaning |
| 624 | that the windows_thread_info has an up-to-date context. A failed |
| 625 | assertion is raised if that assumption is violated. */ |
| 626 | |
| 627 | static void |
| 628 | windows_fetch_one_register (struct regcache *regcache, |
| 629 | windows_thread_info *th, int r) |
| 630 | { |
| 631 | gdb_assert (r >= 0); |
| 632 | gdb_assert (!th->reload_context); |
| 633 | |
| 634 | char *context_ptr = (char *) &th->context; |
| 635 | #ifdef __x86_64__ |
| 636 | if (wow64_process) |
| 637 | context_ptr = (char *) &th->wow64_context; |
| 638 | #endif |
| 639 | |
| 640 | char *context_offset = context_ptr + mappings[r]; |
| 641 | struct gdbarch *gdbarch = regcache->arch (); |
| 642 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 643 | |
| 644 | if (r == I387_FISEG_REGNUM (tdep)) |
| 645 | { |
| 646 | long l = *((long *) context_offset) & 0xffff; |
| 647 | regcache->raw_supply (r, (char *) &l); |
| 648 | } |
| 649 | else if (r == I387_FOP_REGNUM (tdep)) |
| 650 | { |
| 651 | long l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); |
| 652 | regcache->raw_supply (r, (char *) &l); |
| 653 | } |
| 654 | else if (segment_register_p (r)) |
| 655 | { |
| 656 | /* GDB treats segment registers as 32bit registers, but they are |
| 657 | in fact only 16 bits long. Make sure we do not read extra |
| 658 | bits from our source buffer. */ |
| 659 | long l = *((long *) context_offset) & 0xffff; |
| 660 | regcache->raw_supply (r, (char *) &l); |
| 661 | } |
| 662 | else |
| 663 | regcache->raw_supply (r, context_offset); |
| 664 | } |
| 665 | |
| 666 | void |
| 667 | windows_nat_target::fetch_registers (struct regcache *regcache, int r) |
| 668 | { |
| 669 | DWORD tid = regcache->ptid ().tid (); |
| 670 | windows_thread_info *th = thread_rec (tid, TRUE); |
| 671 | |
| 672 | /* Check if TH exists. Windows sometimes uses a non-existent |
| 673 | thread id in its events. */ |
| 674 | if (th == NULL) |
| 675 | return; |
| 676 | |
| 677 | if (th->reload_context) |
| 678 | { |
| 679 | #ifdef __CYGWIN__ |
| 680 | if (have_saved_context) |
| 681 | { |
| 682 | /* Lie about where the program actually is stopped since |
| 683 | cygwin has informed us that we should consider the signal |
| 684 | to have occurred at another location which is stored in |
| 685 | "saved_context. */ |
| 686 | memcpy (&th->context, &saved_context, |
| 687 | __COPY_CONTEXT_SIZE); |
| 688 | have_saved_context = 0; |
| 689 | } |
| 690 | else |
| 691 | #endif |
| 692 | #ifdef __x86_64__ |
| 693 | if (wow64_process) |
| 694 | { |
| 695 | th->wow64_context.ContextFlags = CONTEXT_DEBUGGER_DR; |
| 696 | CHECK (Wow64GetThreadContext (th->h, &th->wow64_context)); |
| 697 | /* Copy dr values from that thread. |
| 698 | But only if there were not modified since last stop. |
| 699 | PR gdb/2388 */ |
| 700 | if (!debug_registers_changed) |
| 701 | { |
| 702 | dr[0] = th->wow64_context.Dr0; |
| 703 | dr[1] = th->wow64_context.Dr1; |
| 704 | dr[2] = th->wow64_context.Dr2; |
| 705 | dr[3] = th->wow64_context.Dr3; |
| 706 | dr[6] = th->wow64_context.Dr6; |
| 707 | dr[7] = th->wow64_context.Dr7; |
| 708 | } |
| 709 | } |
| 710 | else |
| 711 | #endif |
| 712 | { |
| 713 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; |
| 714 | CHECK (GetThreadContext (th->h, &th->context)); |
| 715 | /* Copy dr values from that thread. |
| 716 | But only if there were not modified since last stop. |
| 717 | PR gdb/2388 */ |
| 718 | if (!debug_registers_changed) |
| 719 | { |
| 720 | dr[0] = th->context.Dr0; |
| 721 | dr[1] = th->context.Dr1; |
| 722 | dr[2] = th->context.Dr2; |
| 723 | dr[3] = th->context.Dr3; |
| 724 | dr[6] = th->context.Dr6; |
| 725 | dr[7] = th->context.Dr7; |
| 726 | } |
| 727 | } |
| 728 | th->reload_context = 0; |
| 729 | } |
| 730 | |
| 731 | if (r < 0) |
| 732 | for (r = 0; r < gdbarch_num_regs (regcache->arch()); r++) |
| 733 | windows_fetch_one_register (regcache, th, r); |
| 734 | else |
| 735 | windows_fetch_one_register (regcache, th, r); |
| 736 | } |
| 737 | |
| 738 | /* Collect the register number R from the given regcache, and store |
| 739 | its value into the corresponding area of the given thread's context. |
| 740 | |
| 741 | This function assumes that R is non-negative. A failed assertion |
| 742 | assertion is raised if that is not true. */ |
| 743 | |
| 744 | static void |
| 745 | windows_store_one_register (const struct regcache *regcache, |
| 746 | windows_thread_info *th, int r) |
| 747 | { |
| 748 | gdb_assert (r >= 0); |
| 749 | |
| 750 | char *context_ptr = (char *) &th->context; |
| 751 | #ifdef __x86_64__ |
| 752 | if (wow64_process) |
| 753 | context_ptr = (char *) &th->wow64_context; |
| 754 | #endif |
| 755 | |
| 756 | regcache->raw_collect (r, context_ptr + mappings[r]); |
| 757 | } |
| 758 | |
| 759 | /* Store a new register value into the context of the thread tied to |
| 760 | REGCACHE. */ |
| 761 | |
| 762 | void |
| 763 | windows_nat_target::store_registers (struct regcache *regcache, int r) |
| 764 | { |
| 765 | DWORD tid = regcache->ptid ().tid (); |
| 766 | windows_thread_info *th = thread_rec (tid, TRUE); |
| 767 | |
| 768 | /* Check if TH exists. Windows sometimes uses a non-existent |
| 769 | thread id in its events. */ |
| 770 | if (th == NULL) |
| 771 | return; |
| 772 | |
| 773 | if (r < 0) |
| 774 | for (r = 0; r < gdbarch_num_regs (regcache->arch ()); r++) |
| 775 | windows_store_one_register (regcache, th, r); |
| 776 | else |
| 777 | windows_store_one_register (regcache, th, r); |
| 778 | } |
| 779 | |
| 780 | /* Maintain a linked list of "so" information. */ |
| 781 | struct lm_info_windows : public lm_info_base |
| 782 | { |
| 783 | LPVOID load_addr = 0; |
| 784 | CORE_ADDR text_offset = 0; |
| 785 | }; |
| 786 | |
| 787 | static struct so_list solib_start, *solib_end; |
| 788 | |
| 789 | static struct so_list * |
| 790 | windows_make_so (const char *name, LPVOID load_addr) |
| 791 | { |
| 792 | struct so_list *so; |
| 793 | char *p; |
| 794 | #ifndef __CYGWIN__ |
| 795 | char buf[__PMAX]; |
| 796 | char cwd[__PMAX]; |
| 797 | WIN32_FIND_DATA w32_fd; |
| 798 | HANDLE h = FindFirstFile(name, &w32_fd); |
| 799 | |
| 800 | if (h == INVALID_HANDLE_VALUE) |
| 801 | strcpy (buf, name); |
| 802 | else |
| 803 | { |
| 804 | FindClose (h); |
| 805 | strcpy (buf, name); |
| 806 | if (GetCurrentDirectory (MAX_PATH + 1, cwd)) |
| 807 | { |
| 808 | p = strrchr (buf, '\\'); |
| 809 | if (p) |
| 810 | p[1] = '\0'; |
| 811 | SetCurrentDirectory (buf); |
| 812 | GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p); |
| 813 | SetCurrentDirectory (cwd); |
| 814 | } |
| 815 | } |
| 816 | if (strcasecmp (buf, "ntdll.dll") == 0) |
| 817 | { |
| 818 | GetSystemDirectory (buf, sizeof (buf)); |
| 819 | strcat (buf, "\\ntdll.dll"); |
| 820 | } |
| 821 | #else |
| 822 | cygwin_buf_t buf[__PMAX]; |
| 823 | |
| 824 | buf[0] = 0; |
| 825 | if (access (name, F_OK) != 0) |
| 826 | { |
| 827 | if (strcasecmp (name, "ntdll.dll") == 0) |
| 828 | #ifdef __USEWIDE |
| 829 | { |
| 830 | GetSystemDirectoryW (buf, sizeof (buf) / sizeof (wchar_t)); |
| 831 | wcscat (buf, L"\\ntdll.dll"); |
| 832 | } |
| 833 | #else |
| 834 | { |
| 835 | GetSystemDirectoryA (buf, sizeof (buf) / sizeof (wchar_t)); |
| 836 | strcat (buf, "\\ntdll.dll"); |
| 837 | } |
| 838 | #endif |
| 839 | } |
| 840 | #endif |
| 841 | so = XCNEW (struct so_list); |
| 842 | lm_info_windows *li = new lm_info_windows; |
| 843 | so->lm_info = li; |
| 844 | li->load_addr = load_addr; |
| 845 | strcpy (so->so_original_name, name); |
| 846 | #ifndef __CYGWIN__ |
| 847 | strcpy (so->so_name, buf); |
| 848 | #else |
| 849 | if (buf[0]) |
| 850 | cygwin_conv_path (CCP_WIN_W_TO_POSIX, buf, so->so_name, |
| 851 | SO_NAME_MAX_PATH_SIZE); |
| 852 | else |
| 853 | { |
| 854 | char *rname = realpath (name, NULL); |
| 855 | if (rname && strlen (rname) < SO_NAME_MAX_PATH_SIZE) |
| 856 | { |
| 857 | strcpy (so->so_name, rname); |
| 858 | free (rname); |
| 859 | } |
| 860 | else |
| 861 | error (_("dll path too long")); |
| 862 | } |
| 863 | /* Record cygwin1.dll .text start/end. */ |
| 864 | p = strchr (so->so_name, '\0') - (sizeof ("/cygwin1.dll") - 1); |
| 865 | if (p >= so->so_name && strcasecmp (p, "/cygwin1.dll") == 0) |
| 866 | { |
| 867 | asection *text = NULL; |
| 868 | |
| 869 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (so->so_name, "pei-i386", -1)); |
| 870 | |
| 871 | if (abfd == NULL) |
| 872 | return so; |
| 873 | |
| 874 | if (bfd_check_format (abfd.get (), bfd_object)) |
| 875 | text = bfd_get_section_by_name (abfd.get (), ".text"); |
| 876 | |
| 877 | if (!text) |
| 878 | return so; |
| 879 | |
| 880 | /* The symbols in a dll are offset by 0x1000, which is the |
| 881 | offset from 0 of the first byte in an image - because of the |
| 882 | file header and the section alignment. */ |
| 883 | cygwin_load_start = (CORE_ADDR) (uintptr_t) ((char *) |
| 884 | load_addr + 0x1000); |
| 885 | cygwin_load_end = cygwin_load_start + bfd_section_size (text); |
| 886 | } |
| 887 | #endif |
| 888 | |
| 889 | return so; |
| 890 | } |
| 891 | |
| 892 | static char * |
| 893 | get_image_name (HANDLE h, void *address, int unicode) |
| 894 | { |
| 895 | #ifdef __CYGWIN__ |
| 896 | static char buf[__PMAX]; |
| 897 | #else |
| 898 | static char buf[(2 * __PMAX) + 1]; |
| 899 | #endif |
| 900 | DWORD size = unicode ? sizeof (WCHAR) : sizeof (char); |
| 901 | char *address_ptr; |
| 902 | int len = 0; |
| 903 | char b[2]; |
| 904 | SIZE_T done; |
| 905 | |
| 906 | /* Attempt to read the name of the dll that was detected. |
| 907 | This is documented to work only when actively debugging |
| 908 | a program. It will not work for attached processes. */ |
| 909 | if (address == NULL) |
| 910 | return NULL; |
| 911 | |
| 912 | /* See if we could read the address of a string, and that the |
| 913 | address isn't null. */ |
| 914 | if (!ReadProcessMemory (h, address, &address_ptr, |
| 915 | sizeof (address_ptr), &done) |
| 916 | || done != sizeof (address_ptr) || !address_ptr) |
| 917 | return NULL; |
| 918 | |
| 919 | /* Find the length of the string. */ |
| 920 | while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done) |
| 921 | && (b[0] != 0 || b[size - 1] != 0) && done == size) |
| 922 | continue; |
| 923 | |
| 924 | if (!unicode) |
| 925 | ReadProcessMemory (h, address_ptr, buf, len, &done); |
| 926 | else |
| 927 | { |
| 928 | WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR)); |
| 929 | ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR), |
| 930 | &done); |
| 931 | #ifdef __CYGWIN__ |
| 932 | wcstombs (buf, unicode_address, __PMAX); |
| 933 | #else |
| 934 | WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, sizeof buf, |
| 935 | 0, 0); |
| 936 | #endif |
| 937 | } |
| 938 | |
| 939 | return buf; |
| 940 | } |
| 941 | |
| 942 | /* Handle a DLL load event, and return 1. |
| 943 | |
| 944 | This function assumes that this event did not occur during inferior |
| 945 | initialization, where their event info may be incomplete (see |
| 946 | do_initial_windows_stuff and windows_add_all_dlls for more info |
| 947 | on how we handle DLL loading during that phase). */ |
| 948 | |
| 949 | static void |
| 950 | handle_load_dll () |
| 951 | { |
| 952 | LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; |
| 953 | char *dll_name; |
| 954 | |
| 955 | /* Try getting the DLL name via the lpImageName field of the event. |
| 956 | Note that Microsoft documents this fields as strictly optional, |
| 957 | in the sense that it might be NULL. And the first DLL event in |
| 958 | particular is explicitly documented as "likely not pass[ed]" |
| 959 | (source: MSDN LOAD_DLL_DEBUG_INFO structure). */ |
| 960 | dll_name = get_image_name (current_process_handle, |
| 961 | event->lpImageName, event->fUnicode); |
| 962 | if (!dll_name) |
| 963 | return; |
| 964 | |
| 965 | solib_end->next = windows_make_so (dll_name, event->lpBaseOfDll); |
| 966 | solib_end = solib_end->next; |
| 967 | |
| 968 | lm_info_windows *li = (lm_info_windows *) solib_end->lm_info; |
| 969 | |
| 970 | DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end->so_name, |
| 971 | host_address_to_string (li->load_addr))); |
| 972 | } |
| 973 | |
| 974 | static void |
| 975 | windows_free_so (struct so_list *so) |
| 976 | { |
| 977 | lm_info_windows *li = (lm_info_windows *) so->lm_info; |
| 978 | |
| 979 | delete li; |
| 980 | xfree (so); |
| 981 | } |
| 982 | |
| 983 | /* Handle a DLL unload event. |
| 984 | Return 1 if successful, or zero otherwise. |
| 985 | |
| 986 | This function assumes that this event did not occur during inferior |
| 987 | initialization, where their event info may be incomplete (see |
| 988 | do_initial_windows_stuff and windows_add_all_dlls for more info |
| 989 | on how we handle DLL loading during that phase). */ |
| 990 | |
| 991 | static void |
| 992 | handle_unload_dll () |
| 993 | { |
| 994 | LPVOID lpBaseOfDll = current_event.u.UnloadDll.lpBaseOfDll; |
| 995 | struct so_list *so; |
| 996 | |
| 997 | for (so = &solib_start; so->next != NULL; so = so->next) |
| 998 | { |
| 999 | lm_info_windows *li_next = (lm_info_windows *) so->next->lm_info; |
| 1000 | |
| 1001 | if (li_next->load_addr == lpBaseOfDll) |
| 1002 | { |
| 1003 | struct so_list *sodel = so->next; |
| 1004 | |
| 1005 | so->next = sodel->next; |
| 1006 | if (!so->next) |
| 1007 | solib_end = so; |
| 1008 | DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel->so_name)); |
| 1009 | |
| 1010 | windows_free_so (sodel); |
| 1011 | return; |
| 1012 | } |
| 1013 | } |
| 1014 | |
| 1015 | /* We did not find any DLL that was previously loaded at this address, |
| 1016 | so register a complaint. We do not report an error, because we have |
| 1017 | observed that this may be happening under some circumstances. For |
| 1018 | instance, running 32bit applications on x64 Windows causes us to receive |
| 1019 | 4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these |
| 1020 | events are apparently caused by the WOW layer, the interface between |
| 1021 | 32bit and 64bit worlds). */ |
| 1022 | complaint (_("dll starting at %s not found."), |
| 1023 | host_address_to_string (lpBaseOfDll)); |
| 1024 | } |
| 1025 | |
| 1026 | /* Call FUNC wrapped in a TRY/CATCH that swallows all GDB |
| 1027 | exceptions. */ |
| 1028 | |
| 1029 | static void |
| 1030 | catch_errors (void (*func) ()) |
| 1031 | { |
| 1032 | try |
| 1033 | { |
| 1034 | func (); |
| 1035 | } |
| 1036 | catch (const gdb_exception &ex) |
| 1037 | { |
| 1038 | exception_print (gdb_stderr, ex); |
| 1039 | } |
| 1040 | } |
| 1041 | |
| 1042 | /* Clear list of loaded DLLs. */ |
| 1043 | static void |
| 1044 | windows_clear_solib (void) |
| 1045 | { |
| 1046 | struct so_list *so; |
| 1047 | |
| 1048 | for (so = solib_start.next; so; so = solib_start.next) |
| 1049 | { |
| 1050 | solib_start.next = so->next; |
| 1051 | windows_free_so (so); |
| 1052 | } |
| 1053 | |
| 1054 | solib_end = &solib_start; |
| 1055 | } |
| 1056 | |
| 1057 | static void |
| 1058 | signal_event_command (const char *args, int from_tty) |
| 1059 | { |
| 1060 | uintptr_t event_id = 0; |
| 1061 | char *endargs = NULL; |
| 1062 | |
| 1063 | if (args == NULL) |
| 1064 | error (_("signal-event requires an argument (integer event id)")); |
| 1065 | |
| 1066 | event_id = strtoumax (args, &endargs, 10); |
| 1067 | |
| 1068 | if ((errno == ERANGE) || (event_id == 0) || (event_id > UINTPTR_MAX) || |
| 1069 | ((HANDLE) event_id == INVALID_HANDLE_VALUE)) |
| 1070 | error (_("Failed to convert `%s' to event id"), args); |
| 1071 | |
| 1072 | SetEvent ((HANDLE) event_id); |
| 1073 | CloseHandle ((HANDLE) event_id); |
| 1074 | } |
| 1075 | |
| 1076 | /* Handle DEBUG_STRING output from child process. |
| 1077 | Cygwin prepends its messages with a "cygwin:". Interpret this as |
| 1078 | a Cygwin signal. Otherwise just print the string as a warning. */ |
| 1079 | static int |
| 1080 | handle_output_debug_string (struct target_waitstatus *ourstatus) |
| 1081 | { |
| 1082 | gdb::unique_xmalloc_ptr<char> s; |
| 1083 | int retval = 0; |
| 1084 | |
| 1085 | if (!target_read_string |
| 1086 | ((CORE_ADDR) (uintptr_t) current_event.u.DebugString.lpDebugStringData, |
| 1087 | &s, 1024, 0) |
| 1088 | || !s || !*(s.get ())) |
| 1089 | /* nothing to do */; |
| 1090 | else if (!startswith (s.get (), _CYGWIN_SIGNAL_STRING)) |
| 1091 | { |
| 1092 | #ifdef __CYGWIN__ |
| 1093 | if (!startswith (s.get (), "cYg")) |
| 1094 | #endif |
| 1095 | { |
| 1096 | char *p = strchr (s.get (), '\0'); |
| 1097 | |
| 1098 | if (p > s.get () && *--p == '\n') |
| 1099 | *p = '\0'; |
| 1100 | warning (("%s"), s.get ()); |
| 1101 | } |
| 1102 | } |
| 1103 | #ifdef __CYGWIN__ |
| 1104 | else |
| 1105 | { |
| 1106 | /* Got a cygwin signal marker. A cygwin signal is followed by |
| 1107 | the signal number itself and then optionally followed by the |
| 1108 | thread id and address to saved context within the DLL. If |
| 1109 | these are supplied, then the given thread is assumed to have |
| 1110 | issued the signal and the context from the thread is assumed |
| 1111 | to be stored at the given address in the inferior. Tell gdb |
| 1112 | to treat this like a real signal. */ |
| 1113 | char *p; |
| 1114 | int sig = strtol (s.get () + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0); |
| 1115 | gdb_signal gotasig = gdb_signal_from_host (sig); |
| 1116 | |
| 1117 | ourstatus->value.sig = gotasig; |
| 1118 | if (gotasig) |
| 1119 | { |
| 1120 | LPCVOID x; |
| 1121 | SIZE_T n; |
| 1122 | |
| 1123 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 1124 | retval = strtoul (p, &p, 0); |
| 1125 | if (!retval) |
| 1126 | retval = current_event.dwThreadId; |
| 1127 | else if ((x = (LPCVOID) (uintptr_t) strtoull (p, NULL, 0)) |
| 1128 | && ReadProcessMemory (current_process_handle, x, |
| 1129 | &saved_context, |
| 1130 | __COPY_CONTEXT_SIZE, &n) |
| 1131 | && n == __COPY_CONTEXT_SIZE) |
| 1132 | have_saved_context = 1; |
| 1133 | } |
| 1134 | } |
| 1135 | #endif |
| 1136 | |
| 1137 | return retval; |
| 1138 | } |
| 1139 | |
| 1140 | static int |
| 1141 | display_selector (HANDLE thread, DWORD sel) |
| 1142 | { |
| 1143 | LDT_ENTRY info; |
| 1144 | BOOL ret; |
| 1145 | #ifdef __x86_64__ |
| 1146 | if (wow64_process) |
| 1147 | ret = Wow64GetThreadSelectorEntry (thread, sel, &info); |
| 1148 | else |
| 1149 | #endif |
| 1150 | ret = GetThreadSelectorEntry (thread, sel, &info); |
| 1151 | if (ret) |
| 1152 | { |
| 1153 | int base, limit; |
| 1154 | printf_filtered ("0x%03x: ", (unsigned) sel); |
| 1155 | if (!info.HighWord.Bits.Pres) |
| 1156 | { |
| 1157 | puts_filtered ("Segment not present\n"); |
| 1158 | return 0; |
| 1159 | } |
| 1160 | base = (info.HighWord.Bits.BaseHi << 24) + |
| 1161 | (info.HighWord.Bits.BaseMid << 16) |
| 1162 | + info.BaseLow; |
| 1163 | limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow; |
| 1164 | if (info.HighWord.Bits.Granularity) |
| 1165 | limit = (limit << 12) | 0xfff; |
| 1166 | printf_filtered ("base=0x%08x limit=0x%08x", base, limit); |
| 1167 | if (info.HighWord.Bits.Default_Big) |
| 1168 | puts_filtered(" 32-bit "); |
| 1169 | else |
| 1170 | puts_filtered(" 16-bit "); |
| 1171 | switch ((info.HighWord.Bits.Type & 0xf) >> 1) |
| 1172 | { |
| 1173 | case 0: |
| 1174 | puts_filtered ("Data (Read-Only, Exp-up"); |
| 1175 | break; |
| 1176 | case 1: |
| 1177 | puts_filtered ("Data (Read/Write, Exp-up"); |
| 1178 | break; |
| 1179 | case 2: |
| 1180 | puts_filtered ("Unused segment ("); |
| 1181 | break; |
| 1182 | case 3: |
| 1183 | puts_filtered ("Data (Read/Write, Exp-down"); |
| 1184 | break; |
| 1185 | case 4: |
| 1186 | puts_filtered ("Code (Exec-Only, N.Conf"); |
| 1187 | break; |
| 1188 | case 5: |
| 1189 | puts_filtered ("Code (Exec/Read, N.Conf"); |
| 1190 | break; |
| 1191 | case 6: |
| 1192 | puts_filtered ("Code (Exec-Only, Conf"); |
| 1193 | break; |
| 1194 | case 7: |
| 1195 | puts_filtered ("Code (Exec/Read, Conf"); |
| 1196 | break; |
| 1197 | default: |
| 1198 | printf_filtered ("Unknown type 0x%lx", |
| 1199 | (unsigned long) info.HighWord.Bits.Type); |
| 1200 | } |
| 1201 | if ((info.HighWord.Bits.Type & 0x1) == 0) |
| 1202 | puts_filtered(", N.Acc"); |
| 1203 | puts_filtered (")\n"); |
| 1204 | if ((info.HighWord.Bits.Type & 0x10) == 0) |
| 1205 | puts_filtered("System selector "); |
| 1206 | printf_filtered ("Priviledge level = %ld. ", |
| 1207 | (unsigned long) info.HighWord.Bits.Dpl); |
| 1208 | if (info.HighWord.Bits.Granularity) |
| 1209 | puts_filtered ("Page granular.\n"); |
| 1210 | else |
| 1211 | puts_filtered ("Byte granular.\n"); |
| 1212 | return 1; |
| 1213 | } |
| 1214 | else |
| 1215 | { |
| 1216 | DWORD err = GetLastError (); |
| 1217 | if (err == ERROR_NOT_SUPPORTED) |
| 1218 | printf_filtered ("Function not supported\n"); |
| 1219 | else |
| 1220 | printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel); |
| 1221 | return 0; |
| 1222 | } |
| 1223 | } |
| 1224 | |
| 1225 | static void |
| 1226 | display_selectors (const char * args, int from_tty) |
| 1227 | { |
| 1228 | if (!current_thread) |
| 1229 | { |
| 1230 | puts_filtered ("Impossible to display selectors now.\n"); |
| 1231 | return; |
| 1232 | } |
| 1233 | if (!args) |
| 1234 | { |
| 1235 | #ifdef __x86_64__ |
| 1236 | if (wow64_process) |
| 1237 | { |
| 1238 | puts_filtered ("Selector $cs\n"); |
| 1239 | display_selector (current_thread->h, |
| 1240 | current_thread->wow64_context.SegCs); |
| 1241 | puts_filtered ("Selector $ds\n"); |
| 1242 | display_selector (current_thread->h, |
| 1243 | current_thread->wow64_context.SegDs); |
| 1244 | puts_filtered ("Selector $es\n"); |
| 1245 | display_selector (current_thread->h, |
| 1246 | current_thread->wow64_context.SegEs); |
| 1247 | puts_filtered ("Selector $ss\n"); |
| 1248 | display_selector (current_thread->h, |
| 1249 | current_thread->wow64_context.SegSs); |
| 1250 | puts_filtered ("Selector $fs\n"); |
| 1251 | display_selector (current_thread->h, |
| 1252 | current_thread->wow64_context.SegFs); |
| 1253 | puts_filtered ("Selector $gs\n"); |
| 1254 | display_selector (current_thread->h, |
| 1255 | current_thread->wow64_context.SegGs); |
| 1256 | } |
| 1257 | else |
| 1258 | #endif |
| 1259 | { |
| 1260 | puts_filtered ("Selector $cs\n"); |
| 1261 | display_selector (current_thread->h, |
| 1262 | current_thread->context.SegCs); |
| 1263 | puts_filtered ("Selector $ds\n"); |
| 1264 | display_selector (current_thread->h, |
| 1265 | current_thread->context.SegDs); |
| 1266 | puts_filtered ("Selector $es\n"); |
| 1267 | display_selector (current_thread->h, |
| 1268 | current_thread->context.SegEs); |
| 1269 | puts_filtered ("Selector $ss\n"); |
| 1270 | display_selector (current_thread->h, |
| 1271 | current_thread->context.SegSs); |
| 1272 | puts_filtered ("Selector $fs\n"); |
| 1273 | display_selector (current_thread->h, |
| 1274 | current_thread->context.SegFs); |
| 1275 | puts_filtered ("Selector $gs\n"); |
| 1276 | display_selector (current_thread->h, |
| 1277 | current_thread->context.SegGs); |
| 1278 | } |
| 1279 | } |
| 1280 | else |
| 1281 | { |
| 1282 | int sel; |
| 1283 | sel = parse_and_eval_long (args); |
| 1284 | printf_filtered ("Selector \"%s\"\n",args); |
| 1285 | display_selector (current_thread->h, sel); |
| 1286 | } |
| 1287 | } |
| 1288 | |
| 1289 | #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \ |
| 1290 | printf_unfiltered ("gdb: Target exception %s at %s\n", x, \ |
| 1291 | host_address_to_string (\ |
| 1292 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)) |
| 1293 | |
| 1294 | static handle_exception_result |
| 1295 | handle_exception (struct target_waitstatus *ourstatus) |
| 1296 | { |
| 1297 | EXCEPTION_RECORD *rec = ¤t_event.u.Exception.ExceptionRecord; |
| 1298 | DWORD code = rec->ExceptionCode; |
| 1299 | handle_exception_result result = HANDLE_EXCEPTION_HANDLED; |
| 1300 | |
| 1301 | memcpy (&siginfo_er, rec, sizeof siginfo_er); |
| 1302 | |
| 1303 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 1304 | |
| 1305 | /* Record the context of the current thread. */ |
| 1306 | thread_rec (current_event.dwThreadId, -1); |
| 1307 | |
| 1308 | switch (code) |
| 1309 | { |
| 1310 | case EXCEPTION_ACCESS_VIOLATION: |
| 1311 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION"); |
| 1312 | ourstatus->value.sig = GDB_SIGNAL_SEGV; |
| 1313 | #ifdef __CYGWIN__ |
| 1314 | { |
| 1315 | /* See if the access violation happened within the cygwin DLL |
| 1316 | itself. Cygwin uses a kind of exception handling to deal |
| 1317 | with passed-in invalid addresses. gdb should not treat |
| 1318 | these as real SEGVs since they will be silently handled by |
| 1319 | cygwin. A real SEGV will (theoretically) be caught by |
| 1320 | cygwin later in the process and will be sent as a |
| 1321 | cygwin-specific-signal. So, ignore SEGVs if they show up |
| 1322 | within the text segment of the DLL itself. */ |
| 1323 | const char *fn; |
| 1324 | CORE_ADDR addr = (CORE_ADDR) (uintptr_t) rec->ExceptionAddress; |
| 1325 | |
| 1326 | if ((!cygwin_exceptions && (addr >= cygwin_load_start |
| 1327 | && addr < cygwin_load_end)) |
| 1328 | || (find_pc_partial_function (addr, &fn, NULL, NULL) |
| 1329 | && startswith (fn, "KERNEL32!IsBad"))) |
| 1330 | return HANDLE_EXCEPTION_UNHANDLED; |
| 1331 | } |
| 1332 | #endif |
| 1333 | break; |
| 1334 | case STATUS_STACK_OVERFLOW: |
| 1335 | DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW"); |
| 1336 | ourstatus->value.sig = GDB_SIGNAL_SEGV; |
| 1337 | break; |
| 1338 | case STATUS_FLOAT_DENORMAL_OPERAND: |
| 1339 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND"); |
| 1340 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1341 | break; |
| 1342 | case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: |
| 1343 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED"); |
| 1344 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1345 | break; |
| 1346 | case STATUS_FLOAT_INEXACT_RESULT: |
| 1347 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT"); |
| 1348 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1349 | break; |
| 1350 | case STATUS_FLOAT_INVALID_OPERATION: |
| 1351 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION"); |
| 1352 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1353 | break; |
| 1354 | case STATUS_FLOAT_OVERFLOW: |
| 1355 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW"); |
| 1356 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1357 | break; |
| 1358 | case STATUS_FLOAT_STACK_CHECK: |
| 1359 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK"); |
| 1360 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1361 | break; |
| 1362 | case STATUS_FLOAT_UNDERFLOW: |
| 1363 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW"); |
| 1364 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1365 | break; |
| 1366 | case STATUS_FLOAT_DIVIDE_BY_ZERO: |
| 1367 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO"); |
| 1368 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1369 | break; |
| 1370 | case STATUS_INTEGER_DIVIDE_BY_ZERO: |
| 1371 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO"); |
| 1372 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1373 | break; |
| 1374 | case STATUS_INTEGER_OVERFLOW: |
| 1375 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW"); |
| 1376 | ourstatus->value.sig = GDB_SIGNAL_FPE; |
| 1377 | break; |
| 1378 | case EXCEPTION_BREAKPOINT: |
| 1379 | #ifdef __x86_64__ |
| 1380 | if (ignore_first_breakpoint) |
| 1381 | { |
| 1382 | /* For WOW64 processes, there are always 2 breakpoint exceptions |
| 1383 | on startup, first a BREAKPOINT for the 64bit ntdll.dll, |
| 1384 | then a WX86_BREAKPOINT for the 32bit ntdll.dll. |
| 1385 | Here we only care about the WX86_BREAKPOINT's. */ |
| 1386 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| 1387 | ignore_first_breakpoint = false; |
| 1388 | } |
| 1389 | #endif |
| 1390 | /* FALLTHROUGH */ |
| 1391 | case STATUS_WX86_BREAKPOINT: |
| 1392 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT"); |
| 1393 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1394 | break; |
| 1395 | case DBG_CONTROL_C: |
| 1396 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C"); |
| 1397 | ourstatus->value.sig = GDB_SIGNAL_INT; |
| 1398 | break; |
| 1399 | case DBG_CONTROL_BREAK: |
| 1400 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK"); |
| 1401 | ourstatus->value.sig = GDB_SIGNAL_INT; |
| 1402 | break; |
| 1403 | case EXCEPTION_SINGLE_STEP: |
| 1404 | case STATUS_WX86_SINGLE_STEP: |
| 1405 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP"); |
| 1406 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1407 | break; |
| 1408 | case EXCEPTION_ILLEGAL_INSTRUCTION: |
| 1409 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION"); |
| 1410 | ourstatus->value.sig = GDB_SIGNAL_ILL; |
| 1411 | break; |
| 1412 | case EXCEPTION_PRIV_INSTRUCTION: |
| 1413 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION"); |
| 1414 | ourstatus->value.sig = GDB_SIGNAL_ILL; |
| 1415 | break; |
| 1416 | case EXCEPTION_NONCONTINUABLE_EXCEPTION: |
| 1417 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION"); |
| 1418 | ourstatus->value.sig = GDB_SIGNAL_ILL; |
| 1419 | break; |
| 1420 | case MS_VC_EXCEPTION: |
| 1421 | if (rec->NumberParameters >= 3 |
| 1422 | && (rec->ExceptionInformation[0] & 0xffffffff) == 0x1000) |
| 1423 | { |
| 1424 | DWORD named_thread_id; |
| 1425 | windows_thread_info *named_thread; |
| 1426 | CORE_ADDR thread_name_target; |
| 1427 | |
| 1428 | DEBUG_EXCEPTION_SIMPLE ("MS_VC_EXCEPTION"); |
| 1429 | |
| 1430 | thread_name_target = rec->ExceptionInformation[1]; |
| 1431 | named_thread_id = (DWORD) (0xffffffff & rec->ExceptionInformation[2]); |
| 1432 | |
| 1433 | if (named_thread_id == (DWORD) -1) |
| 1434 | named_thread_id = current_event.dwThreadId; |
| 1435 | |
| 1436 | named_thread = thread_rec (named_thread_id, 0); |
| 1437 | if (named_thread != NULL) |
| 1438 | { |
| 1439 | int thread_name_len; |
| 1440 | gdb::unique_xmalloc_ptr<char> thread_name; |
| 1441 | |
| 1442 | thread_name_len = target_read_string (thread_name_target, |
| 1443 | &thread_name, 1025, NULL); |
| 1444 | if (thread_name_len > 0) |
| 1445 | { |
| 1446 | thread_name.get ()[thread_name_len - 1] = '\0'; |
| 1447 | xfree (named_thread->name); |
| 1448 | named_thread->name = thread_name.release (); |
| 1449 | } |
| 1450 | } |
| 1451 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
| 1452 | result = HANDLE_EXCEPTION_IGNORED; |
| 1453 | break; |
| 1454 | } |
| 1455 | /* treat improperly formed exception as unknown */ |
| 1456 | /* FALLTHROUGH */ |
| 1457 | default: |
| 1458 | /* Treat unhandled first chance exceptions specially. */ |
| 1459 | if (current_event.u.Exception.dwFirstChance) |
| 1460 | return HANDLE_EXCEPTION_UNHANDLED; |
| 1461 | printf_unfiltered ("gdb: unknown target exception 0x%08x at %s\n", |
| 1462 | (unsigned) current_event.u.Exception.ExceptionRecord.ExceptionCode, |
| 1463 | host_address_to_string ( |
| 1464 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
| 1465 | ourstatus->value.sig = GDB_SIGNAL_UNKNOWN; |
| 1466 | break; |
| 1467 | } |
| 1468 | exception_count++; |
| 1469 | last_sig = ourstatus->value.sig; |
| 1470 | return result; |
| 1471 | } |
| 1472 | |
| 1473 | /* Resume thread specified by ID, or all artificially suspended |
| 1474 | threads, if we are continuing execution. KILLED non-zero means we |
| 1475 | have killed the inferior, so we should ignore weird errors due to |
| 1476 | threads shutting down. */ |
| 1477 | static BOOL |
| 1478 | windows_continue (DWORD continue_status, int id, int killed) |
| 1479 | { |
| 1480 | windows_thread_info *th; |
| 1481 | BOOL res; |
| 1482 | |
| 1483 | DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=0x%x, %s);\n", |
| 1484 | (unsigned) current_event.dwProcessId, |
| 1485 | (unsigned) current_event.dwThreadId, |
| 1486 | continue_status == DBG_CONTINUE ? |
| 1487 | "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED")); |
| 1488 | |
| 1489 | for (th = &thread_head; (th = th->next) != NULL;) |
| 1490 | if ((id == -1 || id == (int) th->id) |
| 1491 | && th->suspended) |
| 1492 | { |
| 1493 | #ifdef __x86_64__ |
| 1494 | if (wow64_process) |
| 1495 | { |
| 1496 | if (debug_registers_changed) |
| 1497 | { |
| 1498 | th->wow64_context.ContextFlags |= CONTEXT_DEBUG_REGISTERS; |
| 1499 | th->wow64_context.Dr0 = dr[0]; |
| 1500 | th->wow64_context.Dr1 = dr[1]; |
| 1501 | th->wow64_context.Dr2 = dr[2]; |
| 1502 | th->wow64_context.Dr3 = dr[3]; |
| 1503 | th->wow64_context.Dr6 = DR6_CLEAR_VALUE; |
| 1504 | th->wow64_context.Dr7 = dr[7]; |
| 1505 | } |
| 1506 | if (th->wow64_context.ContextFlags) |
| 1507 | { |
| 1508 | DWORD ec = 0; |
| 1509 | |
| 1510 | if (GetExitCodeThread (th->h, &ec) |
| 1511 | && ec == STILL_ACTIVE) |
| 1512 | { |
| 1513 | BOOL status = Wow64SetThreadContext (th->h, |
| 1514 | &th->wow64_context); |
| 1515 | |
| 1516 | if (!killed) |
| 1517 | CHECK (status); |
| 1518 | } |
| 1519 | th->wow64_context.ContextFlags = 0; |
| 1520 | } |
| 1521 | } |
| 1522 | else |
| 1523 | #endif |
| 1524 | { |
| 1525 | if (debug_registers_changed) |
| 1526 | { |
| 1527 | th->context.ContextFlags |= CONTEXT_DEBUG_REGISTERS; |
| 1528 | th->context.Dr0 = dr[0]; |
| 1529 | th->context.Dr1 = dr[1]; |
| 1530 | th->context.Dr2 = dr[2]; |
| 1531 | th->context.Dr3 = dr[3]; |
| 1532 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 1533 | th->context.Dr7 = dr[7]; |
| 1534 | } |
| 1535 | if (th->context.ContextFlags) |
| 1536 | { |
| 1537 | DWORD ec = 0; |
| 1538 | |
| 1539 | if (GetExitCodeThread (th->h, &ec) |
| 1540 | && ec == STILL_ACTIVE) |
| 1541 | { |
| 1542 | BOOL status = SetThreadContext (th->h, &th->context); |
| 1543 | |
| 1544 | if (!killed) |
| 1545 | CHECK (status); |
| 1546 | } |
| 1547 | th->context.ContextFlags = 0; |
| 1548 | } |
| 1549 | } |
| 1550 | if (th->suspended > 0) |
| 1551 | (void) ResumeThread (th->h); |
| 1552 | th->suspended = 0; |
| 1553 | } |
| 1554 | |
| 1555 | res = ContinueDebugEvent (current_event.dwProcessId, |
| 1556 | current_event.dwThreadId, |
| 1557 | continue_status); |
| 1558 | |
| 1559 | if (!res) |
| 1560 | error (_("Failed to resume program execution" |
| 1561 | " (ContinueDebugEvent failed, error %u)"), |
| 1562 | (unsigned int) GetLastError ()); |
| 1563 | |
| 1564 | debug_registers_changed = 0; |
| 1565 | return res; |
| 1566 | } |
| 1567 | |
| 1568 | /* Called in pathological case where Windows fails to send a |
| 1569 | CREATE_PROCESS_DEBUG_EVENT after an attach. */ |
| 1570 | static DWORD |
| 1571 | fake_create_process (void) |
| 1572 | { |
| 1573 | current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE, |
| 1574 | current_event.dwProcessId); |
| 1575 | if (current_process_handle != NULL) |
| 1576 | open_process_used = 1; |
| 1577 | else |
| 1578 | { |
| 1579 | error (_("OpenProcess call failed, GetLastError = %u"), |
| 1580 | (unsigned) GetLastError ()); |
| 1581 | /* We can not debug anything in that case. */ |
| 1582 | } |
| 1583 | current_thread |
| 1584 | = windows_add_thread (ptid_t (current_event.dwProcessId, 0, |
| 1585 | current_event.dwThreadId), |
| 1586 | current_event.u.CreateThread.hThread, |
| 1587 | current_event.u.CreateThread.lpThreadLocalBase, |
| 1588 | true /* main_thread_p */); |
| 1589 | return current_event.dwThreadId; |
| 1590 | } |
| 1591 | |
| 1592 | void |
| 1593 | windows_nat_target::resume (ptid_t ptid, int step, enum gdb_signal sig) |
| 1594 | { |
| 1595 | windows_thread_info *th; |
| 1596 | DWORD continue_status = DBG_CONTINUE; |
| 1597 | |
| 1598 | /* A specific PTID means `step only this thread id'. */ |
| 1599 | int resume_all = ptid == minus_one_ptid; |
| 1600 | |
| 1601 | /* If we're continuing all threads, it's the current inferior that |
| 1602 | should be handled specially. */ |
| 1603 | if (resume_all) |
| 1604 | ptid = inferior_ptid; |
| 1605 | |
| 1606 | if (sig != GDB_SIGNAL_0) |
| 1607 | { |
| 1608 | if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) |
| 1609 | { |
| 1610 | DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig)); |
| 1611 | } |
| 1612 | else if (sig == last_sig) |
| 1613 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1614 | else |
| 1615 | #if 0 |
| 1616 | /* This code does not seem to work, because |
| 1617 | the kernel does probably not consider changes in the ExceptionRecord |
| 1618 | structure when passing the exception to the inferior. |
| 1619 | Note that this seems possible in the exception handler itself. */ |
| 1620 | { |
| 1621 | for (const xlate_exception &x : xlate) |
| 1622 | if (x.us == sig) |
| 1623 | { |
| 1624 | current_event.u.Exception.ExceptionRecord.ExceptionCode |
| 1625 | = x.them; |
| 1626 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1627 | break; |
| 1628 | } |
| 1629 | if (continue_status == DBG_CONTINUE) |
| 1630 | { |
| 1631 | DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig)); |
| 1632 | } |
| 1633 | } |
| 1634 | #endif |
| 1635 | DEBUG_EXCEPT(("Can only continue with received signal %d.\n", |
| 1636 | last_sig)); |
| 1637 | } |
| 1638 | |
| 1639 | last_sig = GDB_SIGNAL_0; |
| 1640 | |
| 1641 | DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=0x%x, step=%d, sig=%d);\n", |
| 1642 | ptid.pid (), (unsigned) ptid.tid (), step, sig)); |
| 1643 | |
| 1644 | /* Get context for currently selected thread. */ |
| 1645 | th = thread_rec (inferior_ptid.tid (), FALSE); |
| 1646 | if (th) |
| 1647 | { |
| 1648 | #ifdef __x86_64__ |
| 1649 | if (wow64_process) |
| 1650 | { |
| 1651 | if (step) |
| 1652 | { |
| 1653 | /* Single step by setting t bit. */ |
| 1654 | struct regcache *regcache = get_current_regcache (); |
| 1655 | struct gdbarch *gdbarch = regcache->arch (); |
| 1656 | fetch_registers (regcache, gdbarch_ps_regnum (gdbarch)); |
| 1657 | th->wow64_context.EFlags |= FLAG_TRACE_BIT; |
| 1658 | } |
| 1659 | |
| 1660 | if (th->wow64_context.ContextFlags) |
| 1661 | { |
| 1662 | if (debug_registers_changed) |
| 1663 | { |
| 1664 | th->wow64_context.Dr0 = dr[0]; |
| 1665 | th->wow64_context.Dr1 = dr[1]; |
| 1666 | th->wow64_context.Dr2 = dr[2]; |
| 1667 | th->wow64_context.Dr3 = dr[3]; |
| 1668 | th->wow64_context.Dr6 = DR6_CLEAR_VALUE; |
| 1669 | th->wow64_context.Dr7 = dr[7]; |
| 1670 | } |
| 1671 | CHECK (Wow64SetThreadContext (th->h, &th->wow64_context)); |
| 1672 | th->wow64_context.ContextFlags = 0; |
| 1673 | } |
| 1674 | } |
| 1675 | else |
| 1676 | #endif |
| 1677 | { |
| 1678 | if (step) |
| 1679 | { |
| 1680 | /* Single step by setting t bit. */ |
| 1681 | struct regcache *regcache = get_current_regcache (); |
| 1682 | struct gdbarch *gdbarch = regcache->arch (); |
| 1683 | fetch_registers (regcache, gdbarch_ps_regnum (gdbarch)); |
| 1684 | th->context.EFlags |= FLAG_TRACE_BIT; |
| 1685 | } |
| 1686 | |
| 1687 | if (th->context.ContextFlags) |
| 1688 | { |
| 1689 | if (debug_registers_changed) |
| 1690 | { |
| 1691 | th->context.Dr0 = dr[0]; |
| 1692 | th->context.Dr1 = dr[1]; |
| 1693 | th->context.Dr2 = dr[2]; |
| 1694 | th->context.Dr3 = dr[3]; |
| 1695 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 1696 | th->context.Dr7 = dr[7]; |
| 1697 | } |
| 1698 | CHECK (SetThreadContext (th->h, &th->context)); |
| 1699 | th->context.ContextFlags = 0; |
| 1700 | } |
| 1701 | } |
| 1702 | } |
| 1703 | |
| 1704 | /* Allow continuing with the same signal that interrupted us. |
| 1705 | Otherwise complain. */ |
| 1706 | |
| 1707 | if (resume_all) |
| 1708 | windows_continue (continue_status, -1, 0); |
| 1709 | else |
| 1710 | windows_continue (continue_status, ptid.tid (), 0); |
| 1711 | } |
| 1712 | |
| 1713 | /* Ctrl-C handler used when the inferior is not run in the same console. The |
| 1714 | handler is in charge of interrupting the inferior using DebugBreakProcess. |
| 1715 | Note that this function is not available prior to Windows XP. In this case |
| 1716 | we emit a warning. */ |
| 1717 | static BOOL WINAPI |
| 1718 | ctrl_c_handler (DWORD event_type) |
| 1719 | { |
| 1720 | const int attach_flag = current_inferior ()->attach_flag; |
| 1721 | |
| 1722 | /* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */ |
| 1723 | if (event_type != CTRL_C_EVENT && event_type != CTRL_BREAK_EVENT) |
| 1724 | return FALSE; |
| 1725 | |
| 1726 | /* If the inferior and the debugger share the same console, do nothing as |
| 1727 | the inferior has also received the Ctrl-C event. */ |
| 1728 | if (!new_console && !attach_flag) |
| 1729 | return TRUE; |
| 1730 | |
| 1731 | if (!DebugBreakProcess (current_process_handle)) |
| 1732 | warning (_("Could not interrupt program. " |
| 1733 | "Press Ctrl-c in the program console.")); |
| 1734 | |
| 1735 | /* Return true to tell that Ctrl-C has been handled. */ |
| 1736 | return TRUE; |
| 1737 | } |
| 1738 | |
| 1739 | /* Get the next event from the child. Returns a non-zero thread id if the event |
| 1740 | requires handling by WFI (or whatever). */ |
| 1741 | |
| 1742 | int |
| 1743 | windows_nat_target::get_windows_debug_event (int pid, |
| 1744 | struct target_waitstatus *ourstatus) |
| 1745 | { |
| 1746 | BOOL debug_event; |
| 1747 | DWORD continue_status, event_code; |
| 1748 | windows_thread_info *th; |
| 1749 | static windows_thread_info dummy_thread_info; |
| 1750 | DWORD thread_id = 0; |
| 1751 | |
| 1752 | last_sig = GDB_SIGNAL_0; |
| 1753 | |
| 1754 | if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) |
| 1755 | goto out; |
| 1756 | |
| 1757 | event_count++; |
| 1758 | continue_status = DBG_CONTINUE; |
| 1759 | |
| 1760 | event_code = current_event.dwDebugEventCode; |
| 1761 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| 1762 | th = NULL; |
| 1763 | have_saved_context = 0; |
| 1764 | |
| 1765 | switch (event_code) |
| 1766 | { |
| 1767 | case CREATE_THREAD_DEBUG_EVENT: |
| 1768 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1769 | (unsigned) current_event.dwProcessId, |
| 1770 | (unsigned) current_event.dwThreadId, |
| 1771 | "CREATE_THREAD_DEBUG_EVENT")); |
| 1772 | if (saw_create != 1) |
| 1773 | { |
| 1774 | inferior *inf = find_inferior_pid (this, current_event.dwProcessId); |
| 1775 | if (!saw_create && inf->attach_flag) |
| 1776 | { |
| 1777 | /* Kludge around a Windows bug where first event is a create |
| 1778 | thread event. Caused when attached process does not have |
| 1779 | a main thread. */ |
| 1780 | thread_id = fake_create_process (); |
| 1781 | if (thread_id) |
| 1782 | saw_create++; |
| 1783 | } |
| 1784 | break; |
| 1785 | } |
| 1786 | /* Record the existence of this thread. */ |
| 1787 | thread_id = current_event.dwThreadId; |
| 1788 | th = windows_add_thread |
| 1789 | (ptid_t (current_event.dwProcessId, 0, current_event.dwThreadId), |
| 1790 | current_event.u.CreateThread.hThread, |
| 1791 | current_event.u.CreateThread.lpThreadLocalBase, |
| 1792 | false /* main_thread_p */); |
| 1793 | |
| 1794 | break; |
| 1795 | |
| 1796 | case EXIT_THREAD_DEBUG_EVENT: |
| 1797 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1798 | (unsigned) current_event.dwProcessId, |
| 1799 | (unsigned) current_event.dwThreadId, |
| 1800 | "EXIT_THREAD_DEBUG_EVENT")); |
| 1801 | windows_delete_thread (ptid_t (current_event.dwProcessId, 0, |
| 1802 | current_event.dwThreadId), |
| 1803 | current_event.u.ExitThread.dwExitCode, |
| 1804 | false /* main_thread_p */); |
| 1805 | th = &dummy_thread_info; |
| 1806 | break; |
| 1807 | |
| 1808 | case CREATE_PROCESS_DEBUG_EVENT: |
| 1809 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1810 | (unsigned) current_event.dwProcessId, |
| 1811 | (unsigned) current_event.dwThreadId, |
| 1812 | "CREATE_PROCESS_DEBUG_EVENT")); |
| 1813 | CloseHandle (current_event.u.CreateProcessInfo.hFile); |
| 1814 | if (++saw_create != 1) |
| 1815 | break; |
| 1816 | |
| 1817 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; |
| 1818 | /* Add the main thread. */ |
| 1819 | th = windows_add_thread |
| 1820 | (ptid_t (current_event.dwProcessId, 0, |
| 1821 | current_event.dwThreadId), |
| 1822 | current_event.u.CreateProcessInfo.hThread, |
| 1823 | current_event.u.CreateProcessInfo.lpThreadLocalBase, |
| 1824 | true /* main_thread_p */); |
| 1825 | thread_id = current_event.dwThreadId; |
| 1826 | break; |
| 1827 | |
| 1828 | case EXIT_PROCESS_DEBUG_EVENT: |
| 1829 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1830 | (unsigned) current_event.dwProcessId, |
| 1831 | (unsigned) current_event.dwThreadId, |
| 1832 | "EXIT_PROCESS_DEBUG_EVENT")); |
| 1833 | if (!windows_initialization_done) |
| 1834 | { |
| 1835 | target_terminal::ours (); |
| 1836 | target_mourn_inferior (inferior_ptid); |
| 1837 | error (_("During startup program exited with code 0x%x."), |
| 1838 | (unsigned int) current_event.u.ExitProcess.dwExitCode); |
| 1839 | } |
| 1840 | else if (saw_create == 1) |
| 1841 | { |
| 1842 | windows_delete_thread (ptid_t (current_event.dwProcessId, 0, |
| 1843 | current_event.dwThreadId), |
| 1844 | 0, true /* main_thread_p */); |
| 1845 | DWORD exit_status = current_event.u.ExitProcess.dwExitCode; |
| 1846 | /* If the exit status looks like a fatal exception, but we |
| 1847 | don't recognize the exception's code, make the original |
| 1848 | exit status value available, to avoid losing |
| 1849 | information. */ |
| 1850 | int exit_signal |
| 1851 | = WIFSIGNALED (exit_status) ? WTERMSIG (exit_status) : -1; |
| 1852 | if (exit_signal == -1) |
| 1853 | { |
| 1854 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 1855 | ourstatus->value.integer = exit_status; |
| 1856 | } |
| 1857 | else |
| 1858 | { |
| 1859 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
| 1860 | ourstatus->value.sig = gdb_signal_from_host (exit_signal); |
| 1861 | } |
| 1862 | thread_id = current_event.dwThreadId; |
| 1863 | } |
| 1864 | break; |
| 1865 | |
| 1866 | case LOAD_DLL_DEBUG_EVENT: |
| 1867 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1868 | (unsigned) current_event.dwProcessId, |
| 1869 | (unsigned) current_event.dwThreadId, |
| 1870 | "LOAD_DLL_DEBUG_EVENT")); |
| 1871 | CloseHandle (current_event.u.LoadDll.hFile); |
| 1872 | if (saw_create != 1 || ! windows_initialization_done) |
| 1873 | break; |
| 1874 | catch_errors (handle_load_dll); |
| 1875 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1876 | ourstatus->value.integer = 0; |
| 1877 | thread_id = current_event.dwThreadId; |
| 1878 | break; |
| 1879 | |
| 1880 | case UNLOAD_DLL_DEBUG_EVENT: |
| 1881 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1882 | (unsigned) current_event.dwProcessId, |
| 1883 | (unsigned) current_event.dwThreadId, |
| 1884 | "UNLOAD_DLL_DEBUG_EVENT")); |
| 1885 | if (saw_create != 1 || ! windows_initialization_done) |
| 1886 | break; |
| 1887 | catch_errors (handle_unload_dll); |
| 1888 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1889 | ourstatus->value.integer = 0; |
| 1890 | thread_id = current_event.dwThreadId; |
| 1891 | break; |
| 1892 | |
| 1893 | case EXCEPTION_DEBUG_EVENT: |
| 1894 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1895 | (unsigned) current_event.dwProcessId, |
| 1896 | (unsigned) current_event.dwThreadId, |
| 1897 | "EXCEPTION_DEBUG_EVENT")); |
| 1898 | if (saw_create != 1) |
| 1899 | break; |
| 1900 | switch (handle_exception (ourstatus)) |
| 1901 | { |
| 1902 | case HANDLE_EXCEPTION_UNHANDLED: |
| 1903 | default: |
| 1904 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1905 | break; |
| 1906 | case HANDLE_EXCEPTION_HANDLED: |
| 1907 | thread_id = current_event.dwThreadId; |
| 1908 | break; |
| 1909 | case HANDLE_EXCEPTION_IGNORED: |
| 1910 | continue_status = DBG_CONTINUE; |
| 1911 | break; |
| 1912 | } |
| 1913 | break; |
| 1914 | |
| 1915 | case OUTPUT_DEBUG_STRING_EVENT: /* Message from the kernel. */ |
| 1916 | DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n", |
| 1917 | (unsigned) current_event.dwProcessId, |
| 1918 | (unsigned) current_event.dwThreadId, |
| 1919 | "OUTPUT_DEBUG_STRING_EVENT")); |
| 1920 | if (saw_create != 1) |
| 1921 | break; |
| 1922 | thread_id = handle_output_debug_string (ourstatus); |
| 1923 | break; |
| 1924 | |
| 1925 | default: |
| 1926 | if (saw_create != 1) |
| 1927 | break; |
| 1928 | printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n", |
| 1929 | (unsigned) current_event.dwProcessId, |
| 1930 | (unsigned) current_event.dwThreadId); |
| 1931 | printf_unfiltered (" unknown event code %u\n", |
| 1932 | (unsigned) current_event.dwDebugEventCode); |
| 1933 | break; |
| 1934 | } |
| 1935 | |
| 1936 | if (!thread_id || saw_create != 1) |
| 1937 | { |
| 1938 | CHECK (windows_continue (continue_status, -1, 0)); |
| 1939 | } |
| 1940 | else |
| 1941 | { |
| 1942 | inferior_ptid = ptid_t (current_event.dwProcessId, 0, thread_id); |
| 1943 | current_thread = th; |
| 1944 | if (!current_thread) |
| 1945 | current_thread = thread_rec (thread_id, TRUE); |
| 1946 | } |
| 1947 | |
| 1948 | out: |
| 1949 | return thread_id; |
| 1950 | } |
| 1951 | |
| 1952 | /* Wait for interesting events to occur in the target process. */ |
| 1953 | ptid_t |
| 1954 | windows_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, |
| 1955 | int options) |
| 1956 | { |
| 1957 | int pid = -1; |
| 1958 | |
| 1959 | /* We loop when we get a non-standard exception rather than return |
| 1960 | with a SPURIOUS because resume can try and step or modify things, |
| 1961 | which needs a current_thread->h. But some of these exceptions mark |
| 1962 | the birth or death of threads, which mean that the current thread |
| 1963 | isn't necessarily what you think it is. */ |
| 1964 | |
| 1965 | while (1) |
| 1966 | { |
| 1967 | int retval; |
| 1968 | |
| 1969 | /* If the user presses Ctrl-c while the debugger is waiting |
| 1970 | for an event, he expects the debugger to interrupt his program |
| 1971 | and to get the prompt back. There are two possible situations: |
| 1972 | |
| 1973 | - The debugger and the program do not share the console, in |
| 1974 | which case the Ctrl-c event only reached the debugger. |
| 1975 | In that case, the ctrl_c handler will take care of interrupting |
| 1976 | the inferior. Note that this case is working starting with |
| 1977 | Windows XP. For Windows 2000, Ctrl-C should be pressed in the |
| 1978 | inferior console. |
| 1979 | |
| 1980 | - The debugger and the program share the same console, in which |
| 1981 | case both debugger and inferior will receive the Ctrl-c event. |
| 1982 | In that case the ctrl_c handler will ignore the event, as the |
| 1983 | Ctrl-c event generated inside the inferior will trigger the |
| 1984 | expected debug event. |
| 1985 | |
| 1986 | FIXME: brobecker/2008-05-20: If the inferior receives the |
| 1987 | signal first and the delay until GDB receives that signal |
| 1988 | is sufficiently long, GDB can sometimes receive the SIGINT |
| 1989 | after we have unblocked the CTRL+C handler. This would |
| 1990 | lead to the debugger stopping prematurely while handling |
| 1991 | the new-thread event that comes with the handling of the SIGINT |
| 1992 | inside the inferior, and then stop again immediately when |
| 1993 | the user tries to resume the execution in the inferior. |
| 1994 | This is a classic race that we should try to fix one day. */ |
| 1995 | SetConsoleCtrlHandler (&ctrl_c_handler, TRUE); |
| 1996 | retval = get_windows_debug_event (pid, ourstatus); |
| 1997 | SetConsoleCtrlHandler (&ctrl_c_handler, FALSE); |
| 1998 | |
| 1999 | if (retval) |
| 2000 | return ptid_t (current_event.dwProcessId, 0, retval); |
| 2001 | else |
| 2002 | { |
| 2003 | int detach = 0; |
| 2004 | |
| 2005 | if (deprecated_ui_loop_hook != NULL) |
| 2006 | detach = deprecated_ui_loop_hook (0); |
| 2007 | |
| 2008 | if (detach) |
| 2009 | kill (); |
| 2010 | } |
| 2011 | } |
| 2012 | } |
| 2013 | |
| 2014 | /* Iterate over all DLLs currently mapped by our inferior, and |
| 2015 | add them to our list of solibs. */ |
| 2016 | |
| 2017 | static void |
| 2018 | windows_add_all_dlls (void) |
| 2019 | { |
| 2020 | HMODULE dummy_hmodule; |
| 2021 | DWORD cb_needed; |
| 2022 | HMODULE *hmodules; |
| 2023 | int i; |
| 2024 | |
| 2025 | #ifdef __x86_64__ |
| 2026 | if (wow64_process) |
| 2027 | { |
| 2028 | if (EnumProcessModulesEx (current_process_handle, &dummy_hmodule, |
| 2029 | sizeof (HMODULE), &cb_needed, |
| 2030 | LIST_MODULES_32BIT) == 0) |
| 2031 | return; |
| 2032 | } |
| 2033 | else |
| 2034 | #endif |
| 2035 | { |
| 2036 | if (EnumProcessModules (current_process_handle, &dummy_hmodule, |
| 2037 | sizeof (HMODULE), &cb_needed) == 0) |
| 2038 | return; |
| 2039 | } |
| 2040 | |
| 2041 | if (cb_needed < 1) |
| 2042 | return; |
| 2043 | |
| 2044 | hmodules = (HMODULE *) alloca (cb_needed); |
| 2045 | #ifdef __x86_64__ |
| 2046 | if (wow64_process) |
| 2047 | { |
| 2048 | if (EnumProcessModulesEx (current_process_handle, hmodules, |
| 2049 | cb_needed, &cb_needed, |
| 2050 | LIST_MODULES_32BIT) == 0) |
| 2051 | return; |
| 2052 | } |
| 2053 | else |
| 2054 | #endif |
| 2055 | { |
| 2056 | if (EnumProcessModules (current_process_handle, hmodules, |
| 2057 | cb_needed, &cb_needed) == 0) |
| 2058 | return; |
| 2059 | } |
| 2060 | |
| 2061 | char system_dir[__PMAX]; |
| 2062 | char syswow_dir[__PMAX]; |
| 2063 | size_t system_dir_len = 0; |
| 2064 | bool convert_syswow_dir = false; |
| 2065 | #ifdef __x86_64__ |
| 2066 | if (wow64_process) |
| 2067 | #endif |
| 2068 | { |
| 2069 | /* This fails on 32bit Windows because it has no SysWOW64 directory, |
| 2070 | and in this case a path conversion isn't necessary. */ |
| 2071 | UINT len = GetSystemWow64DirectoryA (syswow_dir, sizeof (syswow_dir)); |
| 2072 | if (len > 0) |
| 2073 | { |
| 2074 | /* Check that we have passed a large enough buffer. */ |
| 2075 | gdb_assert (len < sizeof (syswow_dir)); |
| 2076 | |
| 2077 | len = GetSystemDirectoryA (system_dir, sizeof (system_dir)); |
| 2078 | /* Error check. */ |
| 2079 | gdb_assert (len != 0); |
| 2080 | /* Check that we have passed a large enough buffer. */ |
| 2081 | gdb_assert (len < sizeof (system_dir)); |
| 2082 | |
| 2083 | strcat (system_dir, "\\"); |
| 2084 | strcat (syswow_dir, "\\"); |
| 2085 | system_dir_len = strlen (system_dir); |
| 2086 | |
| 2087 | convert_syswow_dir = true; |
| 2088 | } |
| 2089 | |
| 2090 | } |
| 2091 | for (i = 1; i < (int) (cb_needed / sizeof (HMODULE)); i++) |
| 2092 | { |
| 2093 | MODULEINFO mi; |
| 2094 | #ifdef __USEWIDE |
| 2095 | wchar_t dll_name[__PMAX]; |
| 2096 | char dll_name_mb[__PMAX]; |
| 2097 | #else |
| 2098 | char dll_name[__PMAX]; |
| 2099 | #endif |
| 2100 | const char *name; |
| 2101 | if (GetModuleInformation (current_process_handle, hmodules[i], |
| 2102 | &mi, sizeof (mi)) == 0) |
| 2103 | continue; |
| 2104 | if (GetModuleFileNameEx (current_process_handle, hmodules[i], |
| 2105 | dll_name, sizeof (dll_name)) == 0) |
| 2106 | continue; |
| 2107 | #ifdef __USEWIDE |
| 2108 | wcstombs (dll_name_mb, dll_name, __PMAX); |
| 2109 | name = dll_name_mb; |
| 2110 | #else |
| 2111 | name = dll_name; |
| 2112 | #endif |
| 2113 | /* Convert the DLL path of 32bit processes returned by |
| 2114 | GetModuleFileNameEx from the 64bit system directory to the |
| 2115 | 32bit syswow64 directory if necessary. */ |
| 2116 | std::string syswow_dll_path; |
| 2117 | if (convert_syswow_dir |
| 2118 | && strncasecmp (name, system_dir, system_dir_len) == 0 |
| 2119 | && strchr (name + system_dir_len, '\\') == nullptr) |
| 2120 | { |
| 2121 | syswow_dll_path = syswow_dir; |
| 2122 | syswow_dll_path += name + system_dir_len; |
| 2123 | name = syswow_dll_path.c_str(); |
| 2124 | } |
| 2125 | |
| 2126 | solib_end->next = windows_make_so (name, mi.lpBaseOfDll); |
| 2127 | solib_end = solib_end->next; |
| 2128 | } |
| 2129 | } |
| 2130 | |
| 2131 | static void |
| 2132 | do_initial_windows_stuff (struct target_ops *ops, DWORD pid, int attaching) |
| 2133 | { |
| 2134 | int i; |
| 2135 | struct inferior *inf; |
| 2136 | |
| 2137 | last_sig = GDB_SIGNAL_0; |
| 2138 | event_count = 0; |
| 2139 | exception_count = 0; |
| 2140 | open_process_used = 0; |
| 2141 | debug_registers_changed = 0; |
| 2142 | debug_registers_used = 0; |
| 2143 | for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++) |
| 2144 | dr[i] = 0; |
| 2145 | #ifdef __CYGWIN__ |
| 2146 | cygwin_load_start = cygwin_load_end = 0; |
| 2147 | #endif |
| 2148 | current_event.dwProcessId = pid; |
| 2149 | memset (¤t_event, 0, sizeof (current_event)); |
| 2150 | if (!target_is_pushed (ops)) |
| 2151 | push_target (ops); |
| 2152 | disable_breakpoints_in_shlibs (); |
| 2153 | windows_clear_solib (); |
| 2154 | clear_proceed_status (0); |
| 2155 | init_wait_for_inferior (); |
| 2156 | |
| 2157 | #ifdef __x86_64__ |
| 2158 | ignore_first_breakpoint = !attaching && wow64_process; |
| 2159 | |
| 2160 | if (!wow64_process) |
| 2161 | { |
| 2162 | windows_set_context_register_offsets (amd64_mappings); |
| 2163 | windows_set_segment_register_p (amd64_windows_segment_register_p); |
| 2164 | } |
| 2165 | else |
| 2166 | #endif |
| 2167 | { |
| 2168 | windows_set_context_register_offsets (i386_mappings); |
| 2169 | windows_set_segment_register_p (i386_windows_segment_register_p); |
| 2170 | } |
| 2171 | |
| 2172 | inf = current_inferior (); |
| 2173 | inferior_appeared (inf, pid); |
| 2174 | inf->attach_flag = attaching; |
| 2175 | |
| 2176 | /* Make the new process the current inferior, so terminal handling |
| 2177 | can rely on it. When attaching, we don't know about any thread |
| 2178 | id here, but that's OK --- nothing should be referencing the |
| 2179 | current thread until we report an event out of windows_wait. */ |
| 2180 | inferior_ptid = ptid_t (pid); |
| 2181 | |
| 2182 | target_terminal::init (); |
| 2183 | target_terminal::inferior (); |
| 2184 | |
| 2185 | windows_initialization_done = 0; |
| 2186 | |
| 2187 | while (1) |
| 2188 | { |
| 2189 | struct target_waitstatus status; |
| 2190 | |
| 2191 | ops->wait (minus_one_ptid, &status, 0); |
| 2192 | |
| 2193 | /* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread |
| 2194 | events. */ |
| 2195 | if (status.kind != TARGET_WAITKIND_LOADED |
| 2196 | && status.kind != TARGET_WAITKIND_SPURIOUS) |
| 2197 | break; |
| 2198 | |
| 2199 | ops->resume (minus_one_ptid, 0, GDB_SIGNAL_0); |
| 2200 | } |
| 2201 | |
| 2202 | /* Now that the inferior has been started and all DLLs have been mapped, |
| 2203 | we can iterate over all DLLs and load them in. |
| 2204 | |
| 2205 | We avoid doing it any earlier because, on certain versions of Windows, |
| 2206 | LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular, |
| 2207 | we have seen on Windows 8.1 that the ntdll.dll load event does not |
| 2208 | include the DLL name, preventing us from creating an associated SO. |
| 2209 | A possible explanation is that ntdll.dll might be mapped before |
| 2210 | the SO info gets created by the Windows system -- ntdll.dll is |
| 2211 | the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs |
| 2212 | do not seem to suffer from that problem. |
| 2213 | |
| 2214 | Rather than try to work around this sort of issue, it is much |
| 2215 | simpler to just ignore DLL load/unload events during the startup |
| 2216 | phase, and then process them all in one batch now. */ |
| 2217 | windows_add_all_dlls (); |
| 2218 | |
| 2219 | windows_initialization_done = 1; |
| 2220 | return; |
| 2221 | } |
| 2222 | |
| 2223 | /* Try to set or remove a user privilege to the current process. Return -1 |
| 2224 | if that fails, the previous setting of that privilege otherwise. |
| 2225 | |
| 2226 | This code is copied from the Cygwin source code and rearranged to allow |
| 2227 | dynamically loading of the needed symbols from advapi32 which is only |
| 2228 | available on NT/2K/XP. */ |
| 2229 | static int |
| 2230 | set_process_privilege (const char *privilege, BOOL enable) |
| 2231 | { |
| 2232 | HANDLE token_hdl = NULL; |
| 2233 | LUID restore_priv; |
| 2234 | TOKEN_PRIVILEGES new_priv, orig_priv; |
| 2235 | int ret = -1; |
| 2236 | DWORD size; |
| 2237 | |
| 2238 | if (!OpenProcessToken (GetCurrentProcess (), |
| 2239 | TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, |
| 2240 | &token_hdl)) |
| 2241 | goto out; |
| 2242 | |
| 2243 | if (!LookupPrivilegeValueA (NULL, privilege, &restore_priv)) |
| 2244 | goto out; |
| 2245 | |
| 2246 | new_priv.PrivilegeCount = 1; |
| 2247 | new_priv.Privileges[0].Luid = restore_priv; |
| 2248 | new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0; |
| 2249 | |
| 2250 | if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv, |
| 2251 | sizeof orig_priv, &orig_priv, &size)) |
| 2252 | goto out; |
| 2253 | #if 0 |
| 2254 | /* Disabled, otherwise every `attach' in an unprivileged user session |
| 2255 | would raise the "Failed to get SE_DEBUG_NAME privilege" warning in |
| 2256 | windows_attach(). */ |
| 2257 | /* AdjustTokenPrivileges returns TRUE even if the privilege could not |
| 2258 | be enabled. GetLastError () returns an correct error code, though. */ |
| 2259 | if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED) |
| 2260 | goto out; |
| 2261 | #endif |
| 2262 | |
| 2263 | ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0; |
| 2264 | |
| 2265 | out: |
| 2266 | if (token_hdl) |
| 2267 | CloseHandle (token_hdl); |
| 2268 | |
| 2269 | return ret; |
| 2270 | } |
| 2271 | |
| 2272 | /* Attach to process PID, then initialize for debugging it. */ |
| 2273 | |
| 2274 | void |
| 2275 | windows_nat_target::attach (const char *args, int from_tty) |
| 2276 | { |
| 2277 | BOOL ok; |
| 2278 | DWORD pid; |
| 2279 | |
| 2280 | pid = parse_pid_to_attach (args); |
| 2281 | |
| 2282 | if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0) |
| 2283 | { |
| 2284 | printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n"); |
| 2285 | printf_unfiltered ("This can cause attach to " |
| 2286 | "fail on Windows NT/2K/XP\n"); |
| 2287 | } |
| 2288 | |
| 2289 | windows_init_thread_list (); |
| 2290 | ok = DebugActiveProcess (pid); |
| 2291 | saw_create = 0; |
| 2292 | |
| 2293 | #ifdef __CYGWIN__ |
| 2294 | if (!ok) |
| 2295 | { |
| 2296 | /* Try fall back to Cygwin pid. */ |
| 2297 | pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid); |
| 2298 | |
| 2299 | if (pid > 0) |
| 2300 | ok = DebugActiveProcess (pid); |
| 2301 | } |
| 2302 | #endif |
| 2303 | |
| 2304 | if (!ok) |
| 2305 | error (_("Can't attach to process %u (error %u)"), |
| 2306 | (unsigned) pid, (unsigned) GetLastError ()); |
| 2307 | |
| 2308 | DebugSetProcessKillOnExit (FALSE); |
| 2309 | |
| 2310 | if (from_tty) |
| 2311 | { |
| 2312 | const char *exec_file = get_exec_file (0); |
| 2313 | |
| 2314 | if (exec_file) |
| 2315 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, |
| 2316 | target_pid_to_str (ptid_t (pid)).c_str ()); |
| 2317 | else |
| 2318 | printf_unfiltered ("Attaching to %s\n", |
| 2319 | target_pid_to_str (ptid_t (pid)).c_str ()); |
| 2320 | } |
| 2321 | |
| 2322 | #ifdef __x86_64__ |
| 2323 | HANDLE h = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, pid); |
| 2324 | if (h != NULL) |
| 2325 | { |
| 2326 | BOOL wow64; |
| 2327 | if (IsWow64Process (h, &wow64)) |
| 2328 | wow64_process = wow64; |
| 2329 | CloseHandle (h); |
| 2330 | } |
| 2331 | #endif |
| 2332 | |
| 2333 | do_initial_windows_stuff (this, pid, 1); |
| 2334 | target_terminal::ours (); |
| 2335 | } |
| 2336 | |
| 2337 | void |
| 2338 | windows_nat_target::detach (inferior *inf, int from_tty) |
| 2339 | { |
| 2340 | int detached = 1; |
| 2341 | |
| 2342 | ptid_t ptid = minus_one_ptid; |
| 2343 | resume (ptid, 0, GDB_SIGNAL_0); |
| 2344 | |
| 2345 | if (!DebugActiveProcessStop (current_event.dwProcessId)) |
| 2346 | { |
| 2347 | error (_("Can't detach process %u (error %u)"), |
| 2348 | (unsigned) current_event.dwProcessId, (unsigned) GetLastError ()); |
| 2349 | detached = 0; |
| 2350 | } |
| 2351 | DebugSetProcessKillOnExit (FALSE); |
| 2352 | |
| 2353 | if (detached && from_tty) |
| 2354 | { |
| 2355 | const char *exec_file = get_exec_file (0); |
| 2356 | if (exec_file == 0) |
| 2357 | exec_file = ""; |
| 2358 | printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file, |
| 2359 | (unsigned) current_event.dwProcessId); |
| 2360 | } |
| 2361 | |
| 2362 | x86_cleanup_dregs (); |
| 2363 | inferior_ptid = null_ptid; |
| 2364 | detach_inferior (inf); |
| 2365 | |
| 2366 | maybe_unpush_target (); |
| 2367 | } |
| 2368 | |
| 2369 | /* Try to determine the executable filename. |
| 2370 | |
| 2371 | EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN. |
| 2372 | |
| 2373 | Upon success, the filename is stored inside EXE_NAME_RET, and |
| 2374 | this function returns nonzero. |
| 2375 | |
| 2376 | Otherwise, this function returns zero and the contents of |
| 2377 | EXE_NAME_RET is undefined. */ |
| 2378 | |
| 2379 | static int |
| 2380 | windows_get_exec_module_filename (char *exe_name_ret, size_t exe_name_max_len) |
| 2381 | { |
| 2382 | DWORD len; |
| 2383 | HMODULE dh_buf; |
| 2384 | DWORD cbNeeded; |
| 2385 | |
| 2386 | cbNeeded = 0; |
| 2387 | #ifdef __x86_64__ |
| 2388 | if (wow64_process) |
| 2389 | { |
| 2390 | if (!EnumProcessModulesEx (current_process_handle, &dh_buf, |
| 2391 | sizeof (HMODULE), &cbNeeded, |
| 2392 | LIST_MODULES_32BIT) || !cbNeeded) |
| 2393 | return 0; |
| 2394 | } |
| 2395 | else |
| 2396 | #endif |
| 2397 | { |
| 2398 | if (!EnumProcessModules (current_process_handle, &dh_buf, |
| 2399 | sizeof (HMODULE), &cbNeeded) || !cbNeeded) |
| 2400 | return 0; |
| 2401 | } |
| 2402 | |
| 2403 | /* We know the executable is always first in the list of modules, |
| 2404 | which we just fetched. So no need to fetch more. */ |
| 2405 | |
| 2406 | #ifdef __CYGWIN__ |
| 2407 | { |
| 2408 | /* Cygwin prefers that the path be in /x/y/z format, so extract |
| 2409 | the filename into a temporary buffer first, and then convert it |
| 2410 | to POSIX format into the destination buffer. */ |
| 2411 | cygwin_buf_t *pathbuf = (cygwin_buf_t *) alloca (exe_name_max_len * sizeof (cygwin_buf_t)); |
| 2412 | |
| 2413 | len = GetModuleFileNameEx (current_process_handle, |
| 2414 | dh_buf, pathbuf, exe_name_max_len); |
| 2415 | if (len == 0) |
| 2416 | error (_("Error getting executable filename: %u."), |
| 2417 | (unsigned) GetLastError ()); |
| 2418 | if (cygwin_conv_path (CCP_WIN_W_TO_POSIX, pathbuf, exe_name_ret, |
| 2419 | exe_name_max_len) < 0) |
| 2420 | error (_("Error converting executable filename to POSIX: %d."), errno); |
| 2421 | } |
| 2422 | #else |
| 2423 | len = GetModuleFileNameEx (current_process_handle, |
| 2424 | dh_buf, exe_name_ret, exe_name_max_len); |
| 2425 | if (len == 0) |
| 2426 | error (_("Error getting executable filename: %u."), |
| 2427 | (unsigned) GetLastError ()); |
| 2428 | #endif |
| 2429 | |
| 2430 | return 1; /* success */ |
| 2431 | } |
| 2432 | |
| 2433 | /* The pid_to_exec_file target_ops method for this platform. */ |
| 2434 | |
| 2435 | char * |
| 2436 | windows_nat_target::pid_to_exec_file (int pid) |
| 2437 | { |
| 2438 | static char path[__PMAX]; |
| 2439 | #ifdef __CYGWIN__ |
| 2440 | /* Try to find exe name as symlink target of /proc/<pid>/exe. */ |
| 2441 | int nchars; |
| 2442 | char procexe[sizeof ("/proc/4294967295/exe")]; |
| 2443 | |
| 2444 | xsnprintf (procexe, sizeof (procexe), "/proc/%u/exe", pid); |
| 2445 | nchars = readlink (procexe, path, sizeof(path)); |
| 2446 | if (nchars > 0 && nchars < sizeof (path)) |
| 2447 | { |
| 2448 | path[nchars] = '\0'; /* Got it */ |
| 2449 | return path; |
| 2450 | } |
| 2451 | #endif |
| 2452 | |
| 2453 | /* If we get here then either Cygwin is hosed, this isn't a Cygwin version |
| 2454 | of gdb, or we're trying to debug a non-Cygwin windows executable. */ |
| 2455 | if (!windows_get_exec_module_filename (path, sizeof (path))) |
| 2456 | path[0] = '\0'; |
| 2457 | |
| 2458 | return path; |
| 2459 | } |
| 2460 | |
| 2461 | /* Print status information about what we're accessing. */ |
| 2462 | |
| 2463 | void |
| 2464 | windows_nat_target::files_info () |
| 2465 | { |
| 2466 | struct inferior *inf = current_inferior (); |
| 2467 | |
| 2468 | printf_unfiltered ("\tUsing the running image of %s %s.\n", |
| 2469 | inf->attach_flag ? "attached" : "child", |
| 2470 | target_pid_to_str (inferior_ptid).c_str ()); |
| 2471 | } |
| 2472 | |
| 2473 | /* Modify CreateProcess parameters for use of a new separate console. |
| 2474 | Parameters are: |
| 2475 | *FLAGS: DWORD parameter for general process creation flags. |
| 2476 | *SI: STARTUPINFO structure, for which the console window size and |
| 2477 | console buffer size is filled in if GDB is running in a console. |
| 2478 | to create the new console. |
| 2479 | The size of the used font is not available on all versions of |
| 2480 | Windows OS. Furthermore, the current font might not be the default |
| 2481 | font, but this is still better than before. |
| 2482 | If the windows and buffer sizes are computed, |
| 2483 | SI->DWFLAGS is changed so that this information is used |
| 2484 | by CreateProcess function. */ |
| 2485 | |
| 2486 | static void |
| 2487 | windows_set_console_info (STARTUPINFO *si, DWORD *flags) |
| 2488 | { |
| 2489 | HANDLE hconsole = CreateFile ("CONOUT$", GENERIC_READ | GENERIC_WRITE, |
| 2490 | FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0); |
| 2491 | |
| 2492 | if (hconsole != INVALID_HANDLE_VALUE) |
| 2493 | { |
| 2494 | CONSOLE_SCREEN_BUFFER_INFO sbinfo; |
| 2495 | COORD font_size; |
| 2496 | CONSOLE_FONT_INFO cfi; |
| 2497 | |
| 2498 | GetCurrentConsoleFont (hconsole, FALSE, &cfi); |
| 2499 | font_size = GetConsoleFontSize (hconsole, cfi.nFont); |
| 2500 | GetConsoleScreenBufferInfo(hconsole, &sbinfo); |
| 2501 | si->dwXSize = sbinfo.srWindow.Right - sbinfo.srWindow.Left + 1; |
| 2502 | si->dwYSize = sbinfo.srWindow.Bottom - sbinfo.srWindow.Top + 1; |
| 2503 | if (font_size.X) |
| 2504 | si->dwXSize *= font_size.X; |
| 2505 | else |
| 2506 | si->dwXSize *= 8; |
| 2507 | if (font_size.Y) |
| 2508 | si->dwYSize *= font_size.Y; |
| 2509 | else |
| 2510 | si->dwYSize *= 12; |
| 2511 | si->dwXCountChars = sbinfo.dwSize.X; |
| 2512 | si->dwYCountChars = sbinfo.dwSize.Y; |
| 2513 | si->dwFlags |= STARTF_USESIZE | STARTF_USECOUNTCHARS; |
| 2514 | } |
| 2515 | *flags |= CREATE_NEW_CONSOLE; |
| 2516 | } |
| 2517 | |
| 2518 | #ifndef __CYGWIN__ |
| 2519 | /* Function called by qsort to sort environment strings. */ |
| 2520 | |
| 2521 | static int |
| 2522 | envvar_cmp (const void *a, const void *b) |
| 2523 | { |
| 2524 | const char **p = (const char **) a; |
| 2525 | const char **q = (const char **) b; |
| 2526 | return strcasecmp (*p, *q); |
| 2527 | } |
| 2528 | #endif |
| 2529 | |
| 2530 | #ifdef __CYGWIN__ |
| 2531 | static void |
| 2532 | clear_win32_environment (char **env) |
| 2533 | { |
| 2534 | int i; |
| 2535 | size_t len; |
| 2536 | wchar_t *copy = NULL, *equalpos; |
| 2537 | |
| 2538 | for (i = 0; env[i] && *env[i]; i++) |
| 2539 | { |
| 2540 | len = mbstowcs (NULL, env[i], 0) + 1; |
| 2541 | copy = (wchar_t *) xrealloc (copy, len * sizeof (wchar_t)); |
| 2542 | mbstowcs (copy, env[i], len); |
| 2543 | equalpos = wcschr (copy, L'='); |
| 2544 | if (equalpos) |
| 2545 | *equalpos = L'\0'; |
| 2546 | SetEnvironmentVariableW (copy, NULL); |
| 2547 | } |
| 2548 | xfree (copy); |
| 2549 | } |
| 2550 | #endif |
| 2551 | |
| 2552 | #ifndef __CYGWIN__ |
| 2553 | |
| 2554 | /* Redirection of inferior I/O streams for native MS-Windows programs. |
| 2555 | Unlike on Unix, where this is handled by invoking the inferior via |
| 2556 | the shell, on MS-Windows we need to emulate the cmd.exe shell. |
| 2557 | |
| 2558 | The official documentation of the cmd.exe redirection features is here: |
| 2559 | |
| 2560 | http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx |
| 2561 | |
| 2562 | (That page talks about Windows XP, but there's no newer |
| 2563 | documentation, so we assume later versions of cmd.exe didn't change |
| 2564 | anything.) |
| 2565 | |
| 2566 | Caveat: the documentation on that page seems to include a few lies. |
| 2567 | For example, it describes strange constructs 1<&2 and 2<&1, which |
| 2568 | seem to work only when 1>&2 resp. 2>&1 would make sense, and so I |
| 2569 | think the cmd.exe parser of the redirection symbols simply doesn't |
| 2570 | care about the < vs > distinction in these cases. Therefore, the |
| 2571 | supported features are explicitly documented below. |
| 2572 | |
| 2573 | The emulation below aims at supporting all the valid use cases |
| 2574 | supported by cmd.exe, which include: |
| 2575 | |
| 2576 | < FILE redirect standard input from FILE |
| 2577 | 0< FILE redirect standard input from FILE |
| 2578 | <&N redirect standard input from file descriptor N |
| 2579 | 0<&N redirect standard input from file descriptor N |
| 2580 | > FILE redirect standard output to FILE |
| 2581 | >> FILE append standard output to FILE |
| 2582 | 1>> FILE append standard output to FILE |
| 2583 | >&N redirect standard output to file descriptor N |
| 2584 | 1>&N redirect standard output to file descriptor N |
| 2585 | >>&N append standard output to file descriptor N |
| 2586 | 1>>&N append standard output to file descriptor N |
| 2587 | 2> FILE redirect standard error to FILE |
| 2588 | 2>> FILE append standard error to FILE |
| 2589 | 2>&N redirect standard error to file descriptor N |
| 2590 | 2>>&N append standard error to file descriptor N |
| 2591 | |
| 2592 | Note that using N > 2 in the above construct is supported, but |
| 2593 | requires that the corresponding file descriptor be open by some |
| 2594 | means elsewhere or outside GDB. Also note that using ">&0" or |
| 2595 | "<&2" will generally fail, because the file descriptor redirected |
| 2596 | from is normally open in an incompatible mode (e.g., FD 0 is open |
| 2597 | for reading only). IOW, use of such tricks is not recommended; |
| 2598 | you are on your own. |
| 2599 | |
| 2600 | We do NOT support redirection of file descriptors above 2, as in |
| 2601 | "3>SOME-FILE", because MinGW compiled programs don't (supporting |
| 2602 | that needs special handling in the startup code that MinGW |
| 2603 | doesn't have). Pipes are also not supported. |
| 2604 | |
| 2605 | As for invalid use cases, where the redirection contains some |
| 2606 | error, the emulation below will detect that and produce some |
| 2607 | error and/or failure. But the behavior in those cases is not |
| 2608 | bug-for-bug compatible with what cmd.exe does in those cases. |
| 2609 | That's because what cmd.exe does then is not well defined, and |
| 2610 | seems to be a side effect of the cmd.exe parsing of the command |
| 2611 | line more than anything else. For example, try redirecting to an |
| 2612 | invalid file name, as in "> foo:bar". |
| 2613 | |
| 2614 | There are also minor syntactic deviations from what cmd.exe does |
| 2615 | in some corner cases. For example, it doesn't support the likes |
| 2616 | of "> &foo" to mean redirect to file named literally "&foo"; we |
| 2617 | do support that here, because that, too, sounds like some issue |
| 2618 | with the cmd.exe parser. Another nicety is that we support |
| 2619 | redirection targets that use file names with forward slashes, |
| 2620 | something cmd.exe doesn't -- this comes in handy since GDB |
| 2621 | file-name completion can be used when typing the command line for |
| 2622 | the inferior. */ |
| 2623 | |
| 2624 | /* Support routines for redirecting standard handles of the inferior. */ |
| 2625 | |
| 2626 | /* Parse a single redirection spec, open/duplicate the specified |
| 2627 | file/fd, and assign the appropriate value to one of the 3 standard |
| 2628 | file descriptors. */ |
| 2629 | static int |
| 2630 | redir_open (const char *redir_string, int *inp, int *out, int *err) |
| 2631 | { |
| 2632 | int *fd, ref_fd = -2; |
| 2633 | int mode; |
| 2634 | const char *fname = redir_string + 1; |
| 2635 | int rc = *redir_string; |
| 2636 | |
| 2637 | switch (rc) |
| 2638 | { |
| 2639 | case '0': |
| 2640 | fname++; |
| 2641 | /* FALLTHROUGH */ |
| 2642 | case '<': |
| 2643 | fd = inp; |
| 2644 | mode = O_RDONLY; |
| 2645 | break; |
| 2646 | case '1': case '2': |
| 2647 | fname++; |
| 2648 | /* FALLTHROUGH */ |
| 2649 | case '>': |
| 2650 | fd = (rc == '2') ? err : out; |
| 2651 | mode = O_WRONLY | O_CREAT; |
| 2652 | if (*fname == '>') |
| 2653 | { |
| 2654 | fname++; |
| 2655 | mode |= O_APPEND; |
| 2656 | } |
| 2657 | else |
| 2658 | mode |= O_TRUNC; |
| 2659 | break; |
| 2660 | default: |
| 2661 | return -1; |
| 2662 | } |
| 2663 | |
| 2664 | if (*fname == '&' && '0' <= fname[1] && fname[1] <= '9') |
| 2665 | { |
| 2666 | /* A reference to a file descriptor. */ |
| 2667 | char *fdtail; |
| 2668 | ref_fd = (int) strtol (fname + 1, &fdtail, 10); |
| 2669 | if (fdtail > fname + 1 && *fdtail == '\0') |
| 2670 | { |
| 2671 | /* Don't allow redirection when open modes are incompatible. */ |
| 2672 | if ((ref_fd == 0 && (fd == out || fd == err)) |
| 2673 | || ((ref_fd == 1 || ref_fd == 2) && fd == inp)) |
| 2674 | { |
| 2675 | errno = EPERM; |
| 2676 | return -1; |
| 2677 | } |
| 2678 | if (ref_fd == 0) |
| 2679 | ref_fd = *inp; |
| 2680 | else if (ref_fd == 1) |
| 2681 | ref_fd = *out; |
| 2682 | else if (ref_fd == 2) |
| 2683 | ref_fd = *err; |
| 2684 | } |
| 2685 | else |
| 2686 | { |
| 2687 | errno = EBADF; |
| 2688 | return -1; |
| 2689 | } |
| 2690 | } |
| 2691 | else |
| 2692 | fname++; /* skip the separator space */ |
| 2693 | /* If the descriptor is already open, close it. This allows |
| 2694 | multiple specs of redirections for the same stream, which is |
| 2695 | somewhat nonsensical, but still valid and supported by cmd.exe. |
| 2696 | (But cmd.exe only opens a single file in this case, the one |
| 2697 | specified by the last redirection spec on the command line.) */ |
| 2698 | if (*fd >= 0) |
| 2699 | _close (*fd); |
| 2700 | if (ref_fd == -2) |
| 2701 | { |
| 2702 | *fd = _open (fname, mode, _S_IREAD | _S_IWRITE); |
| 2703 | if (*fd < 0) |
| 2704 | return -1; |
| 2705 | } |
| 2706 | else if (ref_fd == -1) |
| 2707 | *fd = -1; /* reset to default destination */ |
| 2708 | else |
| 2709 | { |
| 2710 | *fd = _dup (ref_fd); |
| 2711 | if (*fd < 0) |
| 2712 | return -1; |
| 2713 | } |
| 2714 | /* _open just sets a flag for O_APPEND, which won't be passed to the |
| 2715 | inferior, so we need to actually move the file pointer. */ |
| 2716 | if ((mode & O_APPEND) != 0) |
| 2717 | _lseek (*fd, 0L, SEEK_END); |
| 2718 | return 0; |
| 2719 | } |
| 2720 | |
| 2721 | /* Canonicalize a single redirection spec and set up the corresponding |
| 2722 | file descriptor as specified. */ |
| 2723 | static int |
| 2724 | redir_set_redirection (const char *s, int *inp, int *out, int *err) |
| 2725 | { |
| 2726 | char buf[__PMAX + 2 + 5]; /* extra space for quotes & redirection string */ |
| 2727 | char *d = buf; |
| 2728 | const char *start = s; |
| 2729 | int quote = 0; |
| 2730 | |
| 2731 | *d++ = *s++; /* copy the 1st character, < or > or a digit */ |
| 2732 | if ((*start == '>' || *start == '1' || *start == '2') |
| 2733 | && *s == '>') |
| 2734 | { |
| 2735 | *d++ = *s++; |
| 2736 | if (*s == '>' && *start != '>') |
| 2737 | *d++ = *s++; |
| 2738 | } |
| 2739 | else if (*start == '0' && *s == '<') |
| 2740 | *d++ = *s++; |
| 2741 | /* cmd.exe recognizes "&N" only immediately after the redirection symbol. */ |
| 2742 | if (*s != '&') |
| 2743 | { |
| 2744 | while (isspace (*s)) /* skip whitespace before file name */ |
| 2745 | s++; |
| 2746 | *d++ = ' '; /* separate file name with a single space */ |
| 2747 | } |
| 2748 | |
| 2749 | /* Copy the file name. */ |
| 2750 | while (*s) |
| 2751 | { |
| 2752 | /* Remove quoting characters from the file name in buf[]. */ |
| 2753 | if (*s == '"') /* could support '..' quoting here */ |
| 2754 | { |
| 2755 | if (!quote) |
| 2756 | quote = *s++; |
| 2757 | else if (*s == quote) |
| 2758 | { |
| 2759 | quote = 0; |
| 2760 | s++; |
| 2761 | } |
| 2762 | else |
| 2763 | *d++ = *s++; |
| 2764 | } |
| 2765 | else if (*s == '\\') |
| 2766 | { |
| 2767 | if (s[1] == '"') /* could support '..' here */ |
| 2768 | s++; |
| 2769 | *d++ = *s++; |
| 2770 | } |
| 2771 | else if (isspace (*s) && !quote) |
| 2772 | break; |
| 2773 | else |
| 2774 | *d++ = *s++; |
| 2775 | if (d - buf >= sizeof (buf) - 1) |
| 2776 | { |
| 2777 | errno = ENAMETOOLONG; |
| 2778 | return 0; |
| 2779 | } |
| 2780 | } |
| 2781 | *d = '\0'; |
| 2782 | |
| 2783 | /* Windows doesn't allow redirection characters in file names, so we |
| 2784 | can bail out early if they use them, or if there's no target file |
| 2785 | name after the redirection symbol. */ |
| 2786 | if (d[-1] == '>' || d[-1] == '<') |
| 2787 | { |
| 2788 | errno = ENOENT; |
| 2789 | return 0; |
| 2790 | } |
| 2791 | if (redir_open (buf, inp, out, err) == 0) |
| 2792 | return s - start; |
| 2793 | return 0; |
| 2794 | } |
| 2795 | |
| 2796 | /* Parse the command line for redirection specs and prepare the file |
| 2797 | descriptors for the 3 standard streams accordingly. */ |
| 2798 | static bool |
| 2799 | redirect_inferior_handles (const char *cmd_orig, char *cmd, |
| 2800 | int *inp, int *out, int *err) |
| 2801 | { |
| 2802 | const char *s = cmd_orig; |
| 2803 | char *d = cmd; |
| 2804 | int quote = 0; |
| 2805 | bool retval = false; |
| 2806 | |
| 2807 | while (isspace (*s)) |
| 2808 | *d++ = *s++; |
| 2809 | |
| 2810 | while (*s) |
| 2811 | { |
| 2812 | if (*s == '"') /* could also support '..' quoting here */ |
| 2813 | { |
| 2814 | if (!quote) |
| 2815 | quote = *s; |
| 2816 | else if (*s == quote) |
| 2817 | quote = 0; |
| 2818 | } |
| 2819 | else if (*s == '\\') |
| 2820 | { |
| 2821 | if (s[1] == '"') /* escaped quote char */ |
| 2822 | s++; |
| 2823 | } |
| 2824 | else if (!quote) |
| 2825 | { |
| 2826 | /* Process a single redirection candidate. */ |
| 2827 | if (*s == '<' || *s == '>' |
| 2828 | || ((*s == '1' || *s == '2') && s[1] == '>') |
| 2829 | || (*s == '0' && s[1] == '<')) |
| 2830 | { |
| 2831 | int skip = redir_set_redirection (s, inp, out, err); |
| 2832 | |
| 2833 | if (skip <= 0) |
| 2834 | return false; |
| 2835 | retval = true; |
| 2836 | s += skip; |
| 2837 | } |
| 2838 | } |
| 2839 | if (*s) |
| 2840 | *d++ = *s++; |
| 2841 | } |
| 2842 | *d = '\0'; |
| 2843 | return retval; |
| 2844 | } |
| 2845 | #endif /* !__CYGWIN__ */ |
| 2846 | |
| 2847 | /* Start an inferior windows child process and sets inferior_ptid to its pid. |
| 2848 | EXEC_FILE is the file to run. |
| 2849 | ALLARGS is a string containing the arguments to the program. |
| 2850 | ENV is the environment vector to pass. Errors reported with error(). */ |
| 2851 | |
| 2852 | void |
| 2853 | windows_nat_target::create_inferior (const char *exec_file, |
| 2854 | const std::string &origallargs, |
| 2855 | char **in_env, int from_tty) |
| 2856 | { |
| 2857 | STARTUPINFO si; |
| 2858 | #ifdef __CYGWIN__ |
| 2859 | cygwin_buf_t real_path[__PMAX]; |
| 2860 | cygwin_buf_t shell[__PMAX]; /* Path to shell */ |
| 2861 | cygwin_buf_t infcwd[__PMAX]; |
| 2862 | const char *sh; |
| 2863 | cygwin_buf_t *toexec; |
| 2864 | cygwin_buf_t *cygallargs; |
| 2865 | cygwin_buf_t *args; |
| 2866 | char **old_env = NULL; |
| 2867 | PWCHAR w32_env; |
| 2868 | size_t len; |
| 2869 | int tty; |
| 2870 | int ostdin, ostdout, ostderr; |
| 2871 | #else /* !__CYGWIN__ */ |
| 2872 | char shell[__PMAX]; /* Path to shell */ |
| 2873 | const char *toexec; |
| 2874 | char *args, *allargs_copy; |
| 2875 | size_t args_len, allargs_len; |
| 2876 | int fd_inp = -1, fd_out = -1, fd_err = -1; |
| 2877 | HANDLE tty = INVALID_HANDLE_VALUE; |
| 2878 | bool redirected = false; |
| 2879 | char *w32env; |
| 2880 | char *temp; |
| 2881 | size_t envlen; |
| 2882 | int i; |
| 2883 | size_t envsize; |
| 2884 | char **env; |
| 2885 | #endif /* !__CYGWIN__ */ |
| 2886 | const char *allargs = origallargs.c_str (); |
| 2887 | PROCESS_INFORMATION pi; |
| 2888 | BOOL ret; |
| 2889 | DWORD flags = 0; |
| 2890 | const char *inferior_io_terminal = get_inferior_io_terminal (); |
| 2891 | |
| 2892 | if (!exec_file) |
| 2893 | error (_("No executable specified, use `target exec'.")); |
| 2894 | |
| 2895 | const char *inferior_cwd = get_inferior_cwd (); |
| 2896 | std::string expanded_infcwd; |
| 2897 | if (inferior_cwd != NULL) |
| 2898 | { |
| 2899 | expanded_infcwd = gdb_tilde_expand (inferior_cwd); |
| 2900 | /* Mirror slashes on inferior's cwd. */ |
| 2901 | std::replace (expanded_infcwd.begin (), expanded_infcwd.end (), |
| 2902 | '/', '\\'); |
| 2903 | inferior_cwd = expanded_infcwd.c_str (); |
| 2904 | } |
| 2905 | |
| 2906 | memset (&si, 0, sizeof (si)); |
| 2907 | si.cb = sizeof (si); |
| 2908 | |
| 2909 | if (new_group) |
| 2910 | flags |= CREATE_NEW_PROCESS_GROUP; |
| 2911 | |
| 2912 | if (new_console) |
| 2913 | windows_set_console_info (&si, &flags); |
| 2914 | |
| 2915 | #ifdef __CYGWIN__ |
| 2916 | if (!useshell) |
| 2917 | { |
| 2918 | flags |= DEBUG_ONLY_THIS_PROCESS; |
| 2919 | if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, exec_file, real_path, |
| 2920 | __PMAX * sizeof (cygwin_buf_t)) < 0) |
| 2921 | error (_("Error starting executable: %d"), errno); |
| 2922 | toexec = real_path; |
| 2923 | #ifdef __USEWIDE |
| 2924 | len = mbstowcs (NULL, allargs, 0) + 1; |
| 2925 | if (len == (size_t) -1) |
| 2926 | error (_("Error starting executable: %d"), errno); |
| 2927 | cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t)); |
| 2928 | mbstowcs (cygallargs, allargs, len); |
| 2929 | #else /* !__USEWIDE */ |
| 2930 | cygallargs = allargs; |
| 2931 | #endif |
| 2932 | } |
| 2933 | else |
| 2934 | { |
| 2935 | sh = get_shell (); |
| 2936 | if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, sh, shell, __PMAX) < 0) |
| 2937 | error (_("Error starting executable via shell: %d"), errno); |
| 2938 | #ifdef __USEWIDE |
| 2939 | len = sizeof (L" -c 'exec '") + mbstowcs (NULL, exec_file, 0) |
| 2940 | + mbstowcs (NULL, allargs, 0) + 2; |
| 2941 | cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t)); |
| 2942 | swprintf (cygallargs, len, L" -c 'exec %s %s'", exec_file, allargs); |
| 2943 | #else /* !__USEWIDE */ |
| 2944 | len = (sizeof (" -c 'exec '") + strlen (exec_file) |
| 2945 | + strlen (allargs) + 2); |
| 2946 | cygallargs = (char *) alloca (len); |
| 2947 | xsnprintf (cygallargs, len, " -c 'exec %s %s'", exec_file, allargs); |
| 2948 | #endif /* __USEWIDE */ |
| 2949 | toexec = shell; |
| 2950 | flags |= DEBUG_PROCESS; |
| 2951 | } |
| 2952 | |
| 2953 | if (inferior_cwd != NULL |
| 2954 | && cygwin_conv_path (CCP_POSIX_TO_WIN_W, inferior_cwd, |
| 2955 | infcwd, strlen (inferior_cwd)) < 0) |
| 2956 | error (_("Error converting inferior cwd: %d"), errno); |
| 2957 | |
| 2958 | #ifdef __USEWIDE |
| 2959 | args = (cygwin_buf_t *) alloca ((wcslen (toexec) + wcslen (cygallargs) + 2) |
| 2960 | * sizeof (wchar_t)); |
| 2961 | wcscpy (args, toexec); |
| 2962 | wcscat (args, L" "); |
| 2963 | wcscat (args, cygallargs); |
| 2964 | #else /* !__USEWIDE */ |
| 2965 | args = (cygwin_buf_t *) alloca (strlen (toexec) + strlen (cygallargs) + 2); |
| 2966 | strcpy (args, toexec); |
| 2967 | strcat (args, " "); |
| 2968 | strcat (args, cygallargs); |
| 2969 | #endif /* !__USEWIDE */ |
| 2970 | |
| 2971 | #ifdef CW_CVT_ENV_TO_WINENV |
| 2972 | /* First try to create a direct Win32 copy of the POSIX environment. */ |
| 2973 | w32_env = (PWCHAR) cygwin_internal (CW_CVT_ENV_TO_WINENV, in_env); |
| 2974 | if (w32_env != (PWCHAR) -1) |
| 2975 | flags |= CREATE_UNICODE_ENVIRONMENT; |
| 2976 | else |
| 2977 | /* If that fails, fall back to old method tweaking GDB's environment. */ |
| 2978 | #endif /* CW_CVT_ENV_TO_WINENV */ |
| 2979 | { |
| 2980 | /* Reset all Win32 environment variables to avoid leftover on next run. */ |
| 2981 | clear_win32_environment (environ); |
| 2982 | /* Prepare the environment vars for CreateProcess. */ |
| 2983 | old_env = environ; |
| 2984 | environ = in_env; |
| 2985 | cygwin_internal (CW_SYNC_WINENV); |
| 2986 | w32_env = NULL; |
| 2987 | } |
| 2988 | |
| 2989 | if (!inferior_io_terminal) |
| 2990 | tty = ostdin = ostdout = ostderr = -1; |
| 2991 | else |
| 2992 | { |
| 2993 | tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY); |
| 2994 | if (tty < 0) |
| 2995 | { |
| 2996 | print_sys_errmsg (inferior_io_terminal, errno); |
| 2997 | ostdin = ostdout = ostderr = -1; |
| 2998 | } |
| 2999 | else |
| 3000 | { |
| 3001 | ostdin = dup (0); |
| 3002 | ostdout = dup (1); |
| 3003 | ostderr = dup (2); |
| 3004 | dup2 (tty, 0); |
| 3005 | dup2 (tty, 1); |
| 3006 | dup2 (tty, 2); |
| 3007 | } |
| 3008 | } |
| 3009 | |
| 3010 | windows_init_thread_list (); |
| 3011 | ret = CreateProcess (0, |
| 3012 | args, /* command line */ |
| 3013 | NULL, /* Security */ |
| 3014 | NULL, /* thread */ |
| 3015 | TRUE, /* inherit handles */ |
| 3016 | flags, /* start flags */ |
| 3017 | w32_env, /* environment */ |
| 3018 | inferior_cwd != NULL ? infcwd : NULL, /* current |
| 3019 | directory */ |
| 3020 | &si, |
| 3021 | &pi); |
| 3022 | if (w32_env) |
| 3023 | /* Just free the Win32 environment, if it could be created. */ |
| 3024 | free (w32_env); |
| 3025 | else |
| 3026 | { |
| 3027 | /* Reset all environment variables to avoid leftover on next run. */ |
| 3028 | clear_win32_environment (in_env); |
| 3029 | /* Restore normal GDB environment variables. */ |
| 3030 | environ = old_env; |
| 3031 | cygwin_internal (CW_SYNC_WINENV); |
| 3032 | } |
| 3033 | |
| 3034 | if (tty >= 0) |
| 3035 | { |
| 3036 | ::close (tty); |
| 3037 | dup2 (ostdin, 0); |
| 3038 | dup2 (ostdout, 1); |
| 3039 | dup2 (ostderr, 2); |
| 3040 | ::close (ostdin); |
| 3041 | ::close (ostdout); |
| 3042 | ::close (ostderr); |
| 3043 | } |
| 3044 | #else /* !__CYGWIN__ */ |
| 3045 | allargs_len = strlen (allargs); |
| 3046 | allargs_copy = strcpy ((char *) alloca (allargs_len + 1), allargs); |
| 3047 | if (strpbrk (allargs_copy, "<>") != NULL) |
| 3048 | { |
| 3049 | int e = errno; |
| 3050 | errno = 0; |
| 3051 | redirected = |
| 3052 | redirect_inferior_handles (allargs, allargs_copy, |
| 3053 | &fd_inp, &fd_out, &fd_err); |
| 3054 | if (errno) |
| 3055 | warning (_("Error in redirection: %s."), safe_strerror (errno)); |
| 3056 | else |
| 3057 | errno = e; |
| 3058 | allargs_len = strlen (allargs_copy); |
| 3059 | } |
| 3060 | /* If not all the standard streams are redirected by the command |
| 3061 | line, use inferior_io_terminal for those which aren't. */ |
| 3062 | if (inferior_io_terminal |
| 3063 | && !(fd_inp >= 0 && fd_out >= 0 && fd_err >= 0)) |
| 3064 | { |
| 3065 | SECURITY_ATTRIBUTES sa; |
| 3066 | sa.nLength = sizeof(sa); |
| 3067 | sa.lpSecurityDescriptor = 0; |
| 3068 | sa.bInheritHandle = TRUE; |
| 3069 | tty = CreateFileA (inferior_io_terminal, GENERIC_READ | GENERIC_WRITE, |
| 3070 | 0, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); |
| 3071 | if (tty == INVALID_HANDLE_VALUE) |
| 3072 | warning (_("Warning: Failed to open TTY %s, error %#x."), |
| 3073 | inferior_io_terminal, (unsigned) GetLastError ()); |
| 3074 | } |
| 3075 | if (redirected || tty != INVALID_HANDLE_VALUE) |
| 3076 | { |
| 3077 | if (fd_inp >= 0) |
| 3078 | si.hStdInput = (HANDLE) _get_osfhandle (fd_inp); |
| 3079 | else if (tty != INVALID_HANDLE_VALUE) |
| 3080 | si.hStdInput = tty; |
| 3081 | else |
| 3082 | si.hStdInput = GetStdHandle (STD_INPUT_HANDLE); |
| 3083 | if (fd_out >= 0) |
| 3084 | si.hStdOutput = (HANDLE) _get_osfhandle (fd_out); |
| 3085 | else if (tty != INVALID_HANDLE_VALUE) |
| 3086 | si.hStdOutput = tty; |
| 3087 | else |
| 3088 | si.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); |
| 3089 | if (fd_err >= 0) |
| 3090 | si.hStdError = (HANDLE) _get_osfhandle (fd_err); |
| 3091 | else if (tty != INVALID_HANDLE_VALUE) |
| 3092 | si.hStdError = tty; |
| 3093 | else |
| 3094 | si.hStdError = GetStdHandle (STD_ERROR_HANDLE); |
| 3095 | si.dwFlags |= STARTF_USESTDHANDLES; |
| 3096 | } |
| 3097 | |
| 3098 | toexec = exec_file; |
| 3099 | /* Build the command line, a space-separated list of tokens where |
| 3100 | the first token is the name of the module to be executed. |
| 3101 | To avoid ambiguities introduced by spaces in the module name, |
| 3102 | we quote it. */ |
| 3103 | args_len = strlen (toexec) + 2 /* quotes */ + allargs_len + 2; |
| 3104 | args = (char *) alloca (args_len); |
| 3105 | xsnprintf (args, args_len, "\"%s\" %s", toexec, allargs_copy); |
| 3106 | |
| 3107 | flags |= DEBUG_ONLY_THIS_PROCESS; |
| 3108 | |
| 3109 | /* CreateProcess takes the environment list as a null terminated set of |
| 3110 | strings (i.e. two nulls terminate the list). */ |
| 3111 | |
| 3112 | /* Get total size for env strings. */ |
| 3113 | for (envlen = 0, i = 0; in_env[i] && *in_env[i]; i++) |
| 3114 | envlen += strlen (in_env[i]) + 1; |
| 3115 | |
| 3116 | envsize = sizeof (in_env[0]) * (i + 1); |
| 3117 | env = (char **) alloca (envsize); |
| 3118 | memcpy (env, in_env, envsize); |
| 3119 | /* Windows programs expect the environment block to be sorted. */ |
| 3120 | qsort (env, i, sizeof (char *), envvar_cmp); |
| 3121 | |
| 3122 | w32env = (char *) alloca (envlen + 1); |
| 3123 | |
| 3124 | /* Copy env strings into new buffer. */ |
| 3125 | for (temp = w32env, i = 0; env[i] && *env[i]; i++) |
| 3126 | { |
| 3127 | strcpy (temp, env[i]); |
| 3128 | temp += strlen (temp) + 1; |
| 3129 | } |
| 3130 | |
| 3131 | /* Final nil string to terminate new env. */ |
| 3132 | *temp = 0; |
| 3133 | |
| 3134 | windows_init_thread_list (); |
| 3135 | ret = CreateProcessA (0, |
| 3136 | args, /* command line */ |
| 3137 | NULL, /* Security */ |
| 3138 | NULL, /* thread */ |
| 3139 | TRUE, /* inherit handles */ |
| 3140 | flags, /* start flags */ |
| 3141 | w32env, /* environment */ |
| 3142 | inferior_cwd, /* current directory */ |
| 3143 | &si, |
| 3144 | &pi); |
| 3145 | if (tty != INVALID_HANDLE_VALUE) |
| 3146 | CloseHandle (tty); |
| 3147 | if (fd_inp >= 0) |
| 3148 | _close (fd_inp); |
| 3149 | if (fd_out >= 0) |
| 3150 | _close (fd_out); |
| 3151 | if (fd_err >= 0) |
| 3152 | _close (fd_err); |
| 3153 | #endif /* !__CYGWIN__ */ |
| 3154 | |
| 3155 | if (!ret) |
| 3156 | error (_("Error creating process %s, (error %u)."), |
| 3157 | exec_file, (unsigned) GetLastError ()); |
| 3158 | |
| 3159 | #ifdef __x86_64__ |
| 3160 | BOOL wow64; |
| 3161 | if (IsWow64Process (pi.hProcess, &wow64)) |
| 3162 | wow64_process = wow64; |
| 3163 | #endif |
| 3164 | |
| 3165 | CloseHandle (pi.hThread); |
| 3166 | CloseHandle (pi.hProcess); |
| 3167 | |
| 3168 | if (useshell && shell[0] != '\0') |
| 3169 | saw_create = -1; |
| 3170 | else |
| 3171 | saw_create = 0; |
| 3172 | |
| 3173 | do_initial_windows_stuff (this, pi.dwProcessId, 0); |
| 3174 | |
| 3175 | /* windows_continue (DBG_CONTINUE, -1, 0); */ |
| 3176 | } |
| 3177 | |
| 3178 | void |
| 3179 | windows_nat_target::mourn_inferior () |
| 3180 | { |
| 3181 | (void) windows_continue (DBG_CONTINUE, -1, 0); |
| 3182 | x86_cleanup_dregs(); |
| 3183 | if (open_process_used) |
| 3184 | { |
| 3185 | CHECK (CloseHandle (current_process_handle)); |
| 3186 | open_process_used = 0; |
| 3187 | } |
| 3188 | siginfo_er.ExceptionCode = 0; |
| 3189 | inf_child_target::mourn_inferior (); |
| 3190 | } |
| 3191 | |
| 3192 | /* Send a SIGINT to the process group. This acts just like the user typed a |
| 3193 | ^C on the controlling terminal. */ |
| 3194 | |
| 3195 | void |
| 3196 | windows_nat_target::interrupt () |
| 3197 | { |
| 3198 | DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n")); |
| 3199 | CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId)); |
| 3200 | registers_changed (); /* refresh register state */ |
| 3201 | } |
| 3202 | |
| 3203 | /* Helper for windows_xfer_partial that handles memory transfers. |
| 3204 | Arguments are like target_xfer_partial. */ |
| 3205 | |
| 3206 | static enum target_xfer_status |
| 3207 | windows_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, |
| 3208 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
| 3209 | { |
| 3210 | SIZE_T done = 0; |
| 3211 | BOOL success; |
| 3212 | DWORD lasterror = 0; |
| 3213 | |
| 3214 | if (writebuf != NULL) |
| 3215 | { |
| 3216 | DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n", |
| 3217 | pulongest (len), core_addr_to_string (memaddr))); |
| 3218 | success = WriteProcessMemory (current_process_handle, |
| 3219 | (LPVOID) (uintptr_t) memaddr, writebuf, |
| 3220 | len, &done); |
| 3221 | if (!success) |
| 3222 | lasterror = GetLastError (); |
| 3223 | FlushInstructionCache (current_process_handle, |
| 3224 | (LPCVOID) (uintptr_t) memaddr, len); |
| 3225 | } |
| 3226 | else |
| 3227 | { |
| 3228 | DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n", |
| 3229 | pulongest (len), core_addr_to_string (memaddr))); |
| 3230 | success = ReadProcessMemory (current_process_handle, |
| 3231 | (LPCVOID) (uintptr_t) memaddr, readbuf, |
| 3232 | len, &done); |
| 3233 | if (!success) |
| 3234 | lasterror = GetLastError (); |
| 3235 | } |
| 3236 | *xfered_len = (ULONGEST) done; |
| 3237 | if (!success && lasterror == ERROR_PARTIAL_COPY && done > 0) |
| 3238 | return TARGET_XFER_OK; |
| 3239 | else |
| 3240 | return success ? TARGET_XFER_OK : TARGET_XFER_E_IO; |
| 3241 | } |
| 3242 | |
| 3243 | void |
| 3244 | windows_nat_target::kill () |
| 3245 | { |
| 3246 | CHECK (TerminateProcess (current_process_handle, 0)); |
| 3247 | |
| 3248 | for (;;) |
| 3249 | { |
| 3250 | if (!windows_continue (DBG_CONTINUE, -1, 1)) |
| 3251 | break; |
| 3252 | if (!WaitForDebugEvent (¤t_event, INFINITE)) |
| 3253 | break; |
| 3254 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) |
| 3255 | break; |
| 3256 | } |
| 3257 | |
| 3258 | target_mourn_inferior (inferior_ptid); /* Or just windows_mourn_inferior? */ |
| 3259 | } |
| 3260 | |
| 3261 | void |
| 3262 | windows_nat_target::close () |
| 3263 | { |
| 3264 | DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n", |
| 3265 | inferior_ptid.pid ())); |
| 3266 | } |
| 3267 | |
| 3268 | /* Convert pid to printable format. */ |
| 3269 | std::string |
| 3270 | windows_nat_target::pid_to_str (ptid_t ptid) |
| 3271 | { |
| 3272 | if (ptid.tid () != 0) |
| 3273 | return string_printf ("Thread %d.0x%lx", ptid.pid (), ptid.tid ()); |
| 3274 | |
| 3275 | return normal_pid_to_str (ptid); |
| 3276 | } |
| 3277 | |
| 3278 | static enum target_xfer_status |
| 3279 | windows_xfer_shared_libraries (struct target_ops *ops, |
| 3280 | enum target_object object, const char *annex, |
| 3281 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 3282 | ULONGEST offset, ULONGEST len, |
| 3283 | ULONGEST *xfered_len) |
| 3284 | { |
| 3285 | struct obstack obstack; |
| 3286 | const char *buf; |
| 3287 | LONGEST len_avail; |
| 3288 | struct so_list *so; |
| 3289 | |
| 3290 | if (writebuf) |
| 3291 | return TARGET_XFER_E_IO; |
| 3292 | |
| 3293 | obstack_init (&obstack); |
| 3294 | obstack_grow_str (&obstack, "<library-list>\n"); |
| 3295 | for (so = solib_start.next; so; so = so->next) |
| 3296 | { |
| 3297 | lm_info_windows *li = (lm_info_windows *) so->lm_info; |
| 3298 | |
| 3299 | windows_xfer_shared_library (so->so_name, (CORE_ADDR) |
| 3300 | (uintptr_t) li->load_addr, |
| 3301 | &li->text_offset, |
| 3302 | target_gdbarch (), &obstack); |
| 3303 | } |
| 3304 | obstack_grow_str0 (&obstack, "</library-list>\n"); |
| 3305 | |
| 3306 | buf = (const char *) obstack_finish (&obstack); |
| 3307 | len_avail = strlen (buf); |
| 3308 | if (offset >= len_avail) |
| 3309 | len= 0; |
| 3310 | else |
| 3311 | { |
| 3312 | if (len > len_avail - offset) |
| 3313 | len = len_avail - offset; |
| 3314 | memcpy (readbuf, buf + offset, len); |
| 3315 | } |
| 3316 | |
| 3317 | obstack_free (&obstack, NULL); |
| 3318 | *xfered_len = (ULONGEST) len; |
| 3319 | return len != 0 ? TARGET_XFER_OK : TARGET_XFER_EOF; |
| 3320 | } |
| 3321 | |
| 3322 | /* Helper for windows_nat_target::xfer_partial that handles signal info. */ |
| 3323 | |
| 3324 | static enum target_xfer_status |
| 3325 | windows_xfer_siginfo (gdb_byte *readbuf, ULONGEST offset, ULONGEST len, |
| 3326 | ULONGEST *xfered_len) |
| 3327 | { |
| 3328 | char *buf = (char *) &siginfo_er; |
| 3329 | size_t bufsize = sizeof (siginfo_er); |
| 3330 | |
| 3331 | #ifdef __x86_64__ |
| 3332 | EXCEPTION_RECORD32 er32; |
| 3333 | if (wow64_process) |
| 3334 | { |
| 3335 | buf = (char *) &er32; |
| 3336 | bufsize = sizeof (er32); |
| 3337 | |
| 3338 | er32.ExceptionCode = siginfo_er.ExceptionCode; |
| 3339 | er32.ExceptionFlags = siginfo_er.ExceptionFlags; |
| 3340 | er32.ExceptionRecord = (uintptr_t) siginfo_er.ExceptionRecord; |
| 3341 | er32.ExceptionAddress = (uintptr_t) siginfo_er.ExceptionAddress; |
| 3342 | er32.NumberParameters = siginfo_er.NumberParameters; |
| 3343 | int i; |
| 3344 | for (i = 0; i < EXCEPTION_MAXIMUM_PARAMETERS; i++) |
| 3345 | er32.ExceptionInformation[i] = siginfo_er.ExceptionInformation[i]; |
| 3346 | } |
| 3347 | #endif |
| 3348 | |
| 3349 | if (siginfo_er.ExceptionCode == 0) |
| 3350 | return TARGET_XFER_E_IO; |
| 3351 | |
| 3352 | if (readbuf == nullptr) |
| 3353 | return TARGET_XFER_E_IO; |
| 3354 | |
| 3355 | if (offset > bufsize) |
| 3356 | return TARGET_XFER_E_IO; |
| 3357 | |
| 3358 | if (offset + len > bufsize) |
| 3359 | len = bufsize - offset; |
| 3360 | |
| 3361 | memcpy (readbuf, buf + offset, len); |
| 3362 | *xfered_len = len; |
| 3363 | |
| 3364 | return TARGET_XFER_OK; |
| 3365 | } |
| 3366 | |
| 3367 | enum target_xfer_status |
| 3368 | windows_nat_target::xfer_partial (enum target_object object, |
| 3369 | const char *annex, gdb_byte *readbuf, |
| 3370 | const gdb_byte *writebuf, ULONGEST offset, |
| 3371 | ULONGEST len, ULONGEST *xfered_len) |
| 3372 | { |
| 3373 | switch (object) |
| 3374 | { |
| 3375 | case TARGET_OBJECT_MEMORY: |
| 3376 | return windows_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
| 3377 | |
| 3378 | case TARGET_OBJECT_LIBRARIES: |
| 3379 | return windows_xfer_shared_libraries (this, object, annex, readbuf, |
| 3380 | writebuf, offset, len, xfered_len); |
| 3381 | |
| 3382 | case TARGET_OBJECT_SIGNAL_INFO: |
| 3383 | return windows_xfer_siginfo (readbuf, offset, len, xfered_len); |
| 3384 | |
| 3385 | default: |
| 3386 | if (beneath () == NULL) |
| 3387 | { |
| 3388 | /* This can happen when requesting the transfer of unsupported |
| 3389 | objects before a program has been started (and therefore |
| 3390 | with the current_target having no target beneath). */ |
| 3391 | return TARGET_XFER_E_IO; |
| 3392 | } |
| 3393 | return beneath ()->xfer_partial (object, annex, |
| 3394 | readbuf, writebuf, offset, len, |
| 3395 | xfered_len); |
| 3396 | } |
| 3397 | } |
| 3398 | |
| 3399 | /* Provide thread local base, i.e. Thread Information Block address. |
| 3400 | Returns 1 if ptid is found and sets *ADDR to thread_local_base. */ |
| 3401 | |
| 3402 | bool |
| 3403 | windows_nat_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr) |
| 3404 | { |
| 3405 | windows_thread_info *th; |
| 3406 | |
| 3407 | th = thread_rec (ptid.tid (), 0); |
| 3408 | if (th == NULL) |
| 3409 | return false; |
| 3410 | |
| 3411 | if (addr != NULL) |
| 3412 | *addr = th->thread_local_base; |
| 3413 | |
| 3414 | return true; |
| 3415 | } |
| 3416 | |
| 3417 | ptid_t |
| 3418 | windows_nat_target::get_ada_task_ptid (long lwp, long thread) |
| 3419 | { |
| 3420 | return ptid_t (inferior_ptid.pid (), 0, lwp); |
| 3421 | } |
| 3422 | |
| 3423 | /* Implementation of the to_thread_name method. */ |
| 3424 | |
| 3425 | const char * |
| 3426 | windows_nat_target::thread_name (struct thread_info *thr) |
| 3427 | { |
| 3428 | return thread_rec (thr->ptid.tid (), 0)->name; |
| 3429 | } |
| 3430 | |
| 3431 | |
| 3432 | void _initialize_windows_nat (); |
| 3433 | void |
| 3434 | _initialize_windows_nat () |
| 3435 | { |
| 3436 | x86_dr_low.set_control = cygwin_set_dr7; |
| 3437 | x86_dr_low.set_addr = cygwin_set_dr; |
| 3438 | x86_dr_low.get_addr = cygwin_get_dr; |
| 3439 | x86_dr_low.get_status = cygwin_get_dr6; |
| 3440 | x86_dr_low.get_control = cygwin_get_dr7; |
| 3441 | |
| 3442 | /* x86_dr_low.debug_register_length field is set by |
| 3443 | calling x86_set_debug_register_length function |
| 3444 | in processor windows specific native file. */ |
| 3445 | |
| 3446 | add_inf_child_target (&the_windows_nat_target); |
| 3447 | |
| 3448 | #ifdef __CYGWIN__ |
| 3449 | cygwin_internal (CW_SET_DOS_FILE_WARNING, 0); |
| 3450 | #endif |
| 3451 | |
| 3452 | add_com ("signal-event", class_run, signal_event_command, _("\ |
| 3453 | Signal a crashed process with event ID, to allow its debugging.\n\ |
| 3454 | This command is needed in support of setting up GDB as JIT debugger on \ |
| 3455 | MS-Windows. The command should be invoked from the GDB command line using \ |
| 3456 | the '-ex' command-line option. The ID of the event that blocks the \ |
| 3457 | crashed process will be supplied by the Windows JIT debugging mechanism.")); |
| 3458 | |
| 3459 | #ifdef __CYGWIN__ |
| 3460 | add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\ |
| 3461 | Set use of shell to start subprocess."), _("\ |
| 3462 | Show use of shell to start subprocess."), NULL, |
| 3463 | NULL, |
| 3464 | NULL, /* FIXME: i18n: */ |
| 3465 | &setlist, &showlist); |
| 3466 | |
| 3467 | add_setshow_boolean_cmd ("cygwin-exceptions", class_support, |
| 3468 | &cygwin_exceptions, _("\ |
| 3469 | Break when an exception is detected in the Cygwin DLL itself."), _("\ |
| 3470 | Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL, |
| 3471 | NULL, |
| 3472 | NULL, /* FIXME: i18n: */ |
| 3473 | &setlist, &showlist); |
| 3474 | #endif |
| 3475 | |
| 3476 | add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\ |
| 3477 | Set creation of new console when creating child process."), _("\ |
| 3478 | Show creation of new console when creating child process."), NULL, |
| 3479 | NULL, |
| 3480 | NULL, /* FIXME: i18n: */ |
| 3481 | &setlist, &showlist); |
| 3482 | |
| 3483 | add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\ |
| 3484 | Set creation of new group when creating child process."), _("\ |
| 3485 | Show creation of new group when creating child process."), NULL, |
| 3486 | NULL, |
| 3487 | NULL, /* FIXME: i18n: */ |
| 3488 | &setlist, &showlist); |
| 3489 | |
| 3490 | add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\ |
| 3491 | Set whether to display execution in child process."), _("\ |
| 3492 | Show whether to display execution in child process."), NULL, |
| 3493 | NULL, |
| 3494 | NULL, /* FIXME: i18n: */ |
| 3495 | &setlist, &showlist); |
| 3496 | |
| 3497 | add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\ |
| 3498 | Set whether to display kernel events in child process."), _("\ |
| 3499 | Show whether to display kernel events in child process."), NULL, |
| 3500 | NULL, |
| 3501 | NULL, /* FIXME: i18n: */ |
| 3502 | &setlist, &showlist); |
| 3503 | |
| 3504 | add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\ |
| 3505 | Set whether to display memory accesses in child process."), _("\ |
| 3506 | Show whether to display memory accesses in child process."), NULL, |
| 3507 | NULL, |
| 3508 | NULL, /* FIXME: i18n: */ |
| 3509 | &setlist, &showlist); |
| 3510 | |
| 3511 | add_setshow_boolean_cmd ("debugexceptions", class_support, |
| 3512 | &debug_exceptions, _("\ |
| 3513 | Set whether to display kernel exceptions in child process."), _("\ |
| 3514 | Show whether to display kernel exceptions in child process."), NULL, |
| 3515 | NULL, |
| 3516 | NULL, /* FIXME: i18n: */ |
| 3517 | &setlist, &showlist); |
| 3518 | |
| 3519 | init_w32_command_list (); |
| 3520 | |
| 3521 | add_cmd ("selector", class_info, display_selectors, |
| 3522 | _("Display selectors infos."), |
| 3523 | &info_w32_cmdlist); |
| 3524 | } |
| 3525 | |
| 3526 | /* Hardware watchpoint support, adapted from go32-nat.c code. */ |
| 3527 | |
| 3528 | /* Pass the address ADDR to the inferior in the I'th debug register. |
| 3529 | Here we just store the address in dr array, the registers will be |
| 3530 | actually set up when windows_continue is called. */ |
| 3531 | static void |
| 3532 | cygwin_set_dr (int i, CORE_ADDR addr) |
| 3533 | { |
| 3534 | if (i < 0 || i > 3) |
| 3535 | internal_error (__FILE__, __LINE__, |
| 3536 | _("Invalid register %d in cygwin_set_dr.\n"), i); |
| 3537 | dr[i] = addr; |
| 3538 | debug_registers_changed = 1; |
| 3539 | debug_registers_used = 1; |
| 3540 | } |
| 3541 | |
| 3542 | /* Pass the value VAL to the inferior in the DR7 debug control |
| 3543 | register. Here we just store the address in D_REGS, the watchpoint |
| 3544 | will be actually set up in windows_wait. */ |
| 3545 | static void |
| 3546 | cygwin_set_dr7 (unsigned long val) |
| 3547 | { |
| 3548 | dr[7] = (CORE_ADDR) val; |
| 3549 | debug_registers_changed = 1; |
| 3550 | debug_registers_used = 1; |
| 3551 | } |
| 3552 | |
| 3553 | /* Get the value of debug register I from the inferior. */ |
| 3554 | |
| 3555 | static CORE_ADDR |
| 3556 | cygwin_get_dr (int i) |
| 3557 | { |
| 3558 | return dr[i]; |
| 3559 | } |
| 3560 | |
| 3561 | /* Get the value of the DR6 debug status register from the inferior. |
| 3562 | Here we just return the value stored in dr[6] |
| 3563 | by the last call to thread_rec for current_event.dwThreadId id. */ |
| 3564 | static unsigned long |
| 3565 | cygwin_get_dr6 (void) |
| 3566 | { |
| 3567 | return (unsigned long) dr[6]; |
| 3568 | } |
| 3569 | |
| 3570 | /* Get the value of the DR7 debug status register from the inferior. |
| 3571 | Here we just return the value stored in dr[7] by the last call to |
| 3572 | thread_rec for current_event.dwThreadId id. */ |
| 3573 | |
| 3574 | static unsigned long |
| 3575 | cygwin_get_dr7 (void) |
| 3576 | { |
| 3577 | return (unsigned long) dr[7]; |
| 3578 | } |
| 3579 | |
| 3580 | /* Determine if the thread referenced by "ptid" is alive |
| 3581 | by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0 |
| 3582 | it means that the thread has died. Otherwise it is assumed to be alive. */ |
| 3583 | |
| 3584 | bool |
| 3585 | windows_nat_target::thread_alive (ptid_t ptid) |
| 3586 | { |
| 3587 | int tid; |
| 3588 | |
| 3589 | gdb_assert (ptid.tid () != 0); |
| 3590 | tid = ptid.tid (); |
| 3591 | |
| 3592 | return WaitForSingleObject (thread_rec (tid, FALSE)->h, 0) != WAIT_OBJECT_0; |
| 3593 | } |
| 3594 | |
| 3595 | void _initialize_check_for_gdb_ini (); |
| 3596 | void |
| 3597 | _initialize_check_for_gdb_ini () |
| 3598 | { |
| 3599 | char *homedir; |
| 3600 | if (inhibit_gdbinit) |
| 3601 | return; |
| 3602 | |
| 3603 | homedir = getenv ("HOME"); |
| 3604 | if (homedir) |
| 3605 | { |
| 3606 | char *p; |
| 3607 | char *oldini = (char *) alloca (strlen (homedir) + |
| 3608 | sizeof ("gdb.ini") + 1); |
| 3609 | strcpy (oldini, homedir); |
| 3610 | p = strchr (oldini, '\0'); |
| 3611 | if (p > oldini && !IS_DIR_SEPARATOR (p[-1])) |
| 3612 | *p++ = '/'; |
| 3613 | strcpy (p, "gdb.ini"); |
| 3614 | if (access (oldini, 0) == 0) |
| 3615 | { |
| 3616 | int len = strlen (oldini); |
| 3617 | char *newini = (char *) alloca (len + 2); |
| 3618 | |
| 3619 | xsnprintf (newini, len + 2, "%.*s.gdbinit", |
| 3620 | (int) (len - (sizeof ("gdb.ini") - 1)), oldini); |
| 3621 | warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini); |
| 3622 | } |
| 3623 | } |
| 3624 | } |
| 3625 | |
| 3626 | /* Define dummy functions which always return error for the rare cases where |
| 3627 | these functions could not be found. */ |
| 3628 | static BOOL WINAPI |
| 3629 | bad_DebugActiveProcessStop (DWORD w) |
| 3630 | { |
| 3631 | return FALSE; |
| 3632 | } |
| 3633 | static BOOL WINAPI |
| 3634 | bad_DebugBreakProcess (HANDLE w) |
| 3635 | { |
| 3636 | return FALSE; |
| 3637 | } |
| 3638 | static BOOL WINAPI |
| 3639 | bad_DebugSetProcessKillOnExit (BOOL w) |
| 3640 | { |
| 3641 | return FALSE; |
| 3642 | } |
| 3643 | static BOOL WINAPI |
| 3644 | bad_EnumProcessModules (HANDLE w, HMODULE *x, DWORD y, LPDWORD z) |
| 3645 | { |
| 3646 | return FALSE; |
| 3647 | } |
| 3648 | |
| 3649 | #ifdef __USEWIDE |
| 3650 | static DWORD WINAPI |
| 3651 | bad_GetModuleFileNameExW (HANDLE w, HMODULE x, LPWSTR y, DWORD z) |
| 3652 | { |
| 3653 | return 0; |
| 3654 | } |
| 3655 | #else |
| 3656 | static DWORD WINAPI |
| 3657 | bad_GetModuleFileNameExA (HANDLE w, HMODULE x, LPSTR y, DWORD z) |
| 3658 | { |
| 3659 | return 0; |
| 3660 | } |
| 3661 | #endif |
| 3662 | |
| 3663 | static BOOL WINAPI |
| 3664 | bad_GetModuleInformation (HANDLE w, HMODULE x, LPMODULEINFO y, DWORD z) |
| 3665 | { |
| 3666 | return FALSE; |
| 3667 | } |
| 3668 | |
| 3669 | static BOOL WINAPI |
| 3670 | bad_OpenProcessToken (HANDLE w, DWORD x, PHANDLE y) |
| 3671 | { |
| 3672 | return FALSE; |
| 3673 | } |
| 3674 | |
| 3675 | static BOOL WINAPI |
| 3676 | bad_GetCurrentConsoleFont (HANDLE w, BOOL bMaxWindow, CONSOLE_FONT_INFO *f) |
| 3677 | { |
| 3678 | f->nFont = 0; |
| 3679 | return 1; |
| 3680 | } |
| 3681 | static COORD WINAPI |
| 3682 | bad_GetConsoleFontSize (HANDLE w, DWORD nFont) |
| 3683 | { |
| 3684 | COORD size; |
| 3685 | size.X = 8; |
| 3686 | size.Y = 12; |
| 3687 | return size; |
| 3688 | } |
| 3689 | |
| 3690 | /* Load any functions which may not be available in ancient versions |
| 3691 | of Windows. */ |
| 3692 | |
| 3693 | void _initialize_loadable (); |
| 3694 | void |
| 3695 | _initialize_loadable () |
| 3696 | { |
| 3697 | HMODULE hm = NULL; |
| 3698 | |
| 3699 | #define GPA(m, func) \ |
| 3700 | func = (func ## _ftype *) GetProcAddress (m, #func) |
| 3701 | |
| 3702 | hm = LoadLibrary ("kernel32.dll"); |
| 3703 | if (hm) |
| 3704 | { |
| 3705 | GPA (hm, DebugActiveProcessStop); |
| 3706 | GPA (hm, DebugBreakProcess); |
| 3707 | GPA (hm, DebugSetProcessKillOnExit); |
| 3708 | GPA (hm, GetConsoleFontSize); |
| 3709 | GPA (hm, DebugActiveProcessStop); |
| 3710 | GPA (hm, GetCurrentConsoleFont); |
| 3711 | #ifdef __x86_64__ |
| 3712 | GPA (hm, Wow64SuspendThread); |
| 3713 | GPA (hm, Wow64GetThreadContext); |
| 3714 | GPA (hm, Wow64SetThreadContext); |
| 3715 | GPA (hm, Wow64GetThreadSelectorEntry); |
| 3716 | #endif |
| 3717 | } |
| 3718 | |
| 3719 | /* Set variables to dummy versions of these processes if the function |
| 3720 | wasn't found in kernel32.dll. */ |
| 3721 | if (!DebugBreakProcess) |
| 3722 | DebugBreakProcess = bad_DebugBreakProcess; |
| 3723 | if (!DebugActiveProcessStop || !DebugSetProcessKillOnExit) |
| 3724 | { |
| 3725 | DebugActiveProcessStop = bad_DebugActiveProcessStop; |
| 3726 | DebugSetProcessKillOnExit = bad_DebugSetProcessKillOnExit; |
| 3727 | } |
| 3728 | if (!GetConsoleFontSize) |
| 3729 | GetConsoleFontSize = bad_GetConsoleFontSize; |
| 3730 | if (!GetCurrentConsoleFont) |
| 3731 | GetCurrentConsoleFont = bad_GetCurrentConsoleFont; |
| 3732 | |
| 3733 | /* Load optional functions used for retrieving filename information |
| 3734 | associated with the currently debugged process or its dlls. */ |
| 3735 | hm = LoadLibrary ("psapi.dll"); |
| 3736 | if (hm) |
| 3737 | { |
| 3738 | GPA (hm, EnumProcessModules); |
| 3739 | #ifdef __x86_64__ |
| 3740 | GPA (hm, EnumProcessModulesEx); |
| 3741 | #endif |
| 3742 | GPA (hm, GetModuleInformation); |
| 3743 | GetModuleFileNameEx = (GetModuleFileNameEx_ftype *) |
| 3744 | GetProcAddress (hm, GetModuleFileNameEx_name); |
| 3745 | } |
| 3746 | |
| 3747 | if (!EnumProcessModules || !GetModuleInformation || !GetModuleFileNameEx) |
| 3748 | { |
| 3749 | /* Set variables to dummy versions of these processes if the function |
| 3750 | wasn't found in psapi.dll. */ |
| 3751 | EnumProcessModules = bad_EnumProcessModules; |
| 3752 | GetModuleInformation = bad_GetModuleInformation; |
| 3753 | GetModuleFileNameEx = bad_GetModuleFileNameEx; |
| 3754 | /* This will probably fail on Windows 9x/Me. Let the user know |
| 3755 | that we're missing some functionality. */ |
| 3756 | warning(_("\ |
| 3757 | cannot automatically find executable file or library to read symbols.\n\ |
| 3758 | Use \"file\" or \"dll\" command to load executable/libraries directly.")); |
| 3759 | } |
| 3760 | |
| 3761 | hm = LoadLibrary ("advapi32.dll"); |
| 3762 | if (hm) |
| 3763 | { |
| 3764 | GPA (hm, OpenProcessToken); |
| 3765 | GPA (hm, LookupPrivilegeValueA); |
| 3766 | GPA (hm, AdjustTokenPrivileges); |
| 3767 | /* Only need to set one of these since if OpenProcessToken fails nothing |
| 3768 | else is needed. */ |
| 3769 | if (!OpenProcessToken || !LookupPrivilegeValueA |
| 3770 | || !AdjustTokenPrivileges) |
| 3771 | OpenProcessToken = bad_OpenProcessToken; |
| 3772 | } |
| 3773 | |
| 3774 | #undef GPA |
| 3775 | } |