| 1 | /* Target-vector operations for controlling windows child processes, for GDB. |
| 2 | |
| 3 | Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
| 4 | 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by Cygnus Solutions, A Red Hat Company. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | /* Originally by Steve Chamberlain, sac@cygnus.com */ |
| 24 | |
| 25 | #include "defs.h" |
| 26 | #include "frame.h" /* required by inferior.h */ |
| 27 | #include "inferior.h" |
| 28 | #include "target.h" |
| 29 | #include "exceptions.h" |
| 30 | #include "gdbcore.h" |
| 31 | #include "command.h" |
| 32 | #include "completer.h" |
| 33 | #include "regcache.h" |
| 34 | #include "top.h" |
| 35 | #include <signal.h> |
| 36 | #include <sys/types.h> |
| 37 | #include <fcntl.h> |
| 38 | #include <stdlib.h> |
| 39 | #include <windows.h> |
| 40 | #include <imagehlp.h> |
| 41 | #include <psapi.h> |
| 42 | #ifdef __CYGWIN__ |
| 43 | #include <sys/cygwin.h> |
| 44 | #endif |
| 45 | #include <signal.h> |
| 46 | |
| 47 | #include "buildsym.h" |
| 48 | #include "symfile.h" |
| 49 | #include "objfiles.h" |
| 50 | #include "gdb_obstack.h" |
| 51 | #include "gdb_string.h" |
| 52 | #include "gdbthread.h" |
| 53 | #include "gdbcmd.h" |
| 54 | #include <sys/param.h> |
| 55 | #include <unistd.h> |
| 56 | #include "exec.h" |
| 57 | #include "solist.h" |
| 58 | #include "solib.h" |
| 59 | #include "xml-support.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 "i386-nat.h" |
| 67 | |
| 68 | #define AdjustTokenPrivileges dyn_AdjustTokenPrivileges |
| 69 | #define DebugActiveProcessStop dyn_DebugActiveProcessStop |
| 70 | #define DebugBreakProcess dyn_DebugBreakProcess |
| 71 | #define DebugSetProcessKillOnExit dyn_DebugSetProcessKillOnExit |
| 72 | #define EnumProcessModules dyn_EnumProcessModules |
| 73 | #define GetModuleFileNameExA dyn_GetModuleFileNameExA |
| 74 | #define GetModuleInformation dyn_GetModuleInformation |
| 75 | #define LookupPrivilegeValueA dyn_LookupPrivilegeValueA |
| 76 | #define OpenProcessToken dyn_OpenProcessToken |
| 77 | |
| 78 | static BOOL WINAPI (*AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES, |
| 79 | DWORD, PTOKEN_PRIVILEGES, PDWORD); |
| 80 | static BOOL WINAPI (*DebugActiveProcessStop) (DWORD); |
| 81 | static BOOL WINAPI (*DebugBreakProcess) (HANDLE); |
| 82 | static BOOL WINAPI (*DebugSetProcessKillOnExit) (BOOL); |
| 83 | static BOOL WINAPI (*EnumProcessModules) (HANDLE, HMODULE *, DWORD, |
| 84 | LPDWORD); |
| 85 | static DWORD WINAPI (*GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, |
| 86 | DWORD); |
| 87 | static BOOL WINAPI (*GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, |
| 88 | DWORD); |
| 89 | static BOOL WINAPI (*LookupPrivilegeValueA)(LPCSTR, LPCSTR, PLUID); |
| 90 | static BOOL WINAPI (*OpenProcessToken)(HANDLE, DWORD, PHANDLE); |
| 91 | |
| 92 | static struct target_ops windows_ops; |
| 93 | |
| 94 | #ifdef __CYGWIN__ |
| 95 | /* The starting and ending address of the cygwin1.dll text segment. */ |
| 96 | static CORE_ADDR cygwin_load_start; |
| 97 | static CORE_ADDR cygwin_load_end; |
| 98 | #endif |
| 99 | |
| 100 | static int have_saved_context; /* True if we've saved context from a cygwin signal. */ |
| 101 | static CONTEXT saved_context; /* Containes the saved context from a cygwin signal. */ |
| 102 | |
| 103 | /* If we're not using the old Cygwin header file set, define the |
| 104 | following which never should have been in the generic Win32 API |
| 105 | headers in the first place since they were our own invention... */ |
| 106 | #ifndef _GNU_H_WINDOWS_H |
| 107 | enum |
| 108 | { |
| 109 | FLAG_TRACE_BIT = 0x100, |
| 110 | CONTEXT_DEBUGGER = (CONTEXT_FULL | CONTEXT_FLOATING_POINT) |
| 111 | }; |
| 112 | #endif |
| 113 | |
| 114 | #ifndef CONTEXT_EXTENDED_REGISTERS |
| 115 | /* This macro is only defined on ia32. It only makes sense on this target, |
| 116 | so define it as zero if not already defined. */ |
| 117 | #define CONTEXT_EXTENDED_REGISTERS 0 |
| 118 | #endif |
| 119 | |
| 120 | #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \ |
| 121 | | CONTEXT_EXTENDED_REGISTERS |
| 122 | |
| 123 | static uintptr_t dr[8]; |
| 124 | static int debug_registers_changed; |
| 125 | static int debug_registers_used; |
| 126 | #define DR6_CLEAR_VALUE 0xffff0ff0 |
| 127 | |
| 128 | /* The string sent by cygwin when it processes a signal. |
| 129 | FIXME: This should be in a cygwin include file. */ |
| 130 | #ifndef _CYGWIN_SIGNAL_STRING |
| 131 | #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f" |
| 132 | #endif |
| 133 | |
| 134 | #define CHECK(x) check (x, __FILE__,__LINE__) |
| 135 | #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x |
| 136 | #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x |
| 137 | #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x |
| 138 | #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x |
| 139 | |
| 140 | static void windows_stop (ptid_t); |
| 141 | static int windows_thread_alive (struct target_ops *, ptid_t); |
| 142 | static void windows_kill_inferior (struct target_ops *); |
| 143 | |
| 144 | static void cygwin_set_dr (int i, CORE_ADDR addr); |
| 145 | static void cygwin_set_dr7 (unsigned long val); |
| 146 | static unsigned long cygwin_get_dr6 (void); |
| 147 | |
| 148 | static enum target_signal last_sig = TARGET_SIGNAL_0; |
| 149 | /* Set if a signal was received from the debugged process */ |
| 150 | |
| 151 | /* Thread information structure used to track information that is |
| 152 | not available in gdb's thread structure. */ |
| 153 | typedef struct thread_info_struct |
| 154 | { |
| 155 | struct thread_info_struct *next; |
| 156 | DWORD id; |
| 157 | HANDLE h; |
| 158 | char *name; |
| 159 | int suspended; |
| 160 | int reload_context; |
| 161 | CONTEXT context; |
| 162 | STACKFRAME sf; |
| 163 | } |
| 164 | thread_info; |
| 165 | |
| 166 | static thread_info thread_head; |
| 167 | |
| 168 | /* The process and thread handles for the above context. */ |
| 169 | |
| 170 | static DEBUG_EVENT current_event; /* The current debug event from |
| 171 | WaitForDebugEvent */ |
| 172 | static HANDLE current_process_handle; /* Currently executing process */ |
| 173 | static thread_info *current_thread; /* Info on currently selected thread */ |
| 174 | static DWORD main_thread_id; /* Thread ID of the main thread */ |
| 175 | |
| 176 | /* Counts of things. */ |
| 177 | static int exception_count = 0; |
| 178 | static int event_count = 0; |
| 179 | static int saw_create; |
| 180 | static int open_process_used = 0; |
| 181 | |
| 182 | /* User options. */ |
| 183 | static int new_console = 0; |
| 184 | #ifdef __CYGWIN__ |
| 185 | static int cygwin_exceptions = 0; |
| 186 | #endif |
| 187 | static int new_group = 1; |
| 188 | static int debug_exec = 0; /* show execution */ |
| 189 | static int debug_events = 0; /* show events from kernel */ |
| 190 | static int debug_memory = 0; /* show target memory accesses */ |
| 191 | static int debug_exceptions = 0; /* show target exceptions */ |
| 192 | static int useshell = 0; /* use shell for subprocesses */ |
| 193 | |
| 194 | /* This vector maps GDB's idea of a register's number into an offset |
| 195 | in the windows exception context vector. |
| 196 | |
| 197 | It also contains the bit mask needed to load the register in question. |
| 198 | |
| 199 | The contents of this table can only be computed by the units |
| 200 | that provide CPU-specific support for Windows native debugging. |
| 201 | These units should set the table by calling |
| 202 | windows_set_context_register_offsets. |
| 203 | |
| 204 | One day we could read a reg, we could inspect the context we |
| 205 | already have loaded, if it doesn't have the bit set that we need, |
| 206 | we read that set of registers in using GetThreadContext. If the |
| 207 | context already contains what we need, we just unpack it. Then to |
| 208 | write a register, first we have to ensure that the context contains |
| 209 | the other regs of the group, and then we copy the info in and set |
| 210 | out bit. */ |
| 211 | |
| 212 | static const int *mappings; |
| 213 | |
| 214 | /* This vector maps the target's idea of an exception (extracted |
| 215 | from the DEBUG_EVENT structure) to GDB's idea. */ |
| 216 | |
| 217 | struct xlate_exception |
| 218 | { |
| 219 | int them; |
| 220 | enum target_signal us; |
| 221 | }; |
| 222 | |
| 223 | static const struct xlate_exception |
| 224 | xlate[] = |
| 225 | { |
| 226 | {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV}, |
| 227 | {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV}, |
| 228 | {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP}, |
| 229 | {DBG_CONTROL_C, TARGET_SIGNAL_INT}, |
| 230 | {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP}, |
| 231 | {STATUS_FLOAT_DIVIDE_BY_ZERO, TARGET_SIGNAL_FPE}, |
| 232 | {-1, -1}}; |
| 233 | |
| 234 | /* Set the MAPPINGS static global to OFFSETS. |
| 235 | See the description of MAPPINGS for more details. */ |
| 236 | |
| 237 | void |
| 238 | windows_set_context_register_offsets (const int *offsets) |
| 239 | { |
| 240 | mappings = offsets; |
| 241 | } |
| 242 | |
| 243 | static void |
| 244 | check (BOOL ok, const char *file, int line) |
| 245 | { |
| 246 | if (!ok) |
| 247 | printf_filtered ("error return %s:%d was %lu\n", file, line, |
| 248 | GetLastError ()); |
| 249 | } |
| 250 | |
| 251 | /* Find a thread record given a thread id. If GET_CONTEXT is not 0, |
| 252 | then also retrieve the context for this thread. If GET_CONTEXT is |
| 253 | negative, then don't suspend the thread. */ |
| 254 | static thread_info * |
| 255 | thread_rec (DWORD id, int get_context) |
| 256 | { |
| 257 | thread_info *th; |
| 258 | |
| 259 | for (th = &thread_head; (th = th->next) != NULL;) |
| 260 | if (th->id == id) |
| 261 | { |
| 262 | if (!th->suspended && get_context) |
| 263 | { |
| 264 | if (get_context > 0 && id != current_event.dwThreadId) |
| 265 | { |
| 266 | if (SuspendThread (th->h) == (DWORD) -1) |
| 267 | { |
| 268 | DWORD err = GetLastError (); |
| 269 | warning (_("SuspendThread failed. (winerr %d)"), |
| 270 | (int) err); |
| 271 | return NULL; |
| 272 | } |
| 273 | th->suspended = 1; |
| 274 | } |
| 275 | else if (get_context < 0) |
| 276 | th->suspended = -1; |
| 277 | th->reload_context = 1; |
| 278 | } |
| 279 | return th; |
| 280 | } |
| 281 | |
| 282 | return NULL; |
| 283 | } |
| 284 | |
| 285 | /* Add a thread to the thread list. */ |
| 286 | static thread_info * |
| 287 | windows_add_thread (ptid_t ptid, HANDLE h) |
| 288 | { |
| 289 | thread_info *th; |
| 290 | DWORD id; |
| 291 | |
| 292 | gdb_assert (ptid_get_tid (ptid) != 0); |
| 293 | |
| 294 | id = ptid_get_tid (ptid); |
| 295 | |
| 296 | if ((th = thread_rec (id, FALSE))) |
| 297 | return th; |
| 298 | |
| 299 | th = XZALLOC (thread_info); |
| 300 | th->id = id; |
| 301 | th->h = h; |
| 302 | th->next = thread_head.next; |
| 303 | thread_head.next = th; |
| 304 | add_thread (ptid); |
| 305 | /* Set the debug registers for the new thread if they are used. */ |
| 306 | if (debug_registers_used) |
| 307 | { |
| 308 | /* Only change the value of the debug registers. */ |
| 309 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 310 | CHECK (GetThreadContext (th->h, &th->context)); |
| 311 | th->context.Dr0 = dr[0]; |
| 312 | th->context.Dr1 = dr[1]; |
| 313 | th->context.Dr2 = dr[2]; |
| 314 | th->context.Dr3 = dr[3]; |
| 315 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 316 | th->context.Dr7 = dr[7]; |
| 317 | CHECK (SetThreadContext (th->h, &th->context)); |
| 318 | th->context.ContextFlags = 0; |
| 319 | } |
| 320 | return th; |
| 321 | } |
| 322 | |
| 323 | /* Clear out any old thread list and reintialize it to a |
| 324 | pristine state. */ |
| 325 | static void |
| 326 | windows_init_thread_list (void) |
| 327 | { |
| 328 | thread_info *th = &thread_head; |
| 329 | |
| 330 | DEBUG_EVENTS (("gdb: windows_init_thread_list\n")); |
| 331 | init_thread_list (); |
| 332 | while (th->next != NULL) |
| 333 | { |
| 334 | thread_info *here = th->next; |
| 335 | th->next = here->next; |
| 336 | xfree (here); |
| 337 | } |
| 338 | thread_head.next = NULL; |
| 339 | } |
| 340 | |
| 341 | /* Delete a thread from the list of threads */ |
| 342 | static void |
| 343 | windows_delete_thread (ptid_t ptid) |
| 344 | { |
| 345 | thread_info *th; |
| 346 | DWORD id; |
| 347 | |
| 348 | gdb_assert (ptid_get_tid (ptid) != 0); |
| 349 | |
| 350 | id = ptid_get_tid (ptid); |
| 351 | |
| 352 | if (info_verbose) |
| 353 | printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid)); |
| 354 | delete_thread (ptid); |
| 355 | |
| 356 | for (th = &thread_head; |
| 357 | th->next != NULL && th->next->id != id; |
| 358 | th = th->next) |
| 359 | continue; |
| 360 | |
| 361 | if (th->next != NULL) |
| 362 | { |
| 363 | thread_info *here = th->next; |
| 364 | th->next = here->next; |
| 365 | xfree (here); |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | static void |
| 370 | do_windows_fetch_inferior_registers (struct regcache *regcache, int r) |
| 371 | { |
| 372 | char *context_offset = ((char *) ¤t_thread->context) + mappings[r]; |
| 373 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 374 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 375 | long l; |
| 376 | |
| 377 | if (!current_thread) |
| 378 | return; /* Windows sometimes uses a non-existent thread id in its |
| 379 | events */ |
| 380 | |
| 381 | if (current_thread->reload_context) |
| 382 | { |
| 383 | #ifdef __COPY_CONTEXT_SIZE |
| 384 | if (have_saved_context) |
| 385 | { |
| 386 | /* Lie about where the program actually is stopped since cygwin has informed us that |
| 387 | we should consider the signal to have occurred at another location which is stored |
| 388 | in "saved_context. */ |
| 389 | memcpy (¤t_thread->context, &saved_context, __COPY_CONTEXT_SIZE); |
| 390 | have_saved_context = 0; |
| 391 | } |
| 392 | else |
| 393 | #endif |
| 394 | { |
| 395 | thread_info *th = current_thread; |
| 396 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; |
| 397 | GetThreadContext (th->h, &th->context); |
| 398 | /* Copy dr values from that thread. |
| 399 | But only if there were not modified since last stop. PR gdb/2388 */ |
| 400 | if (!debug_registers_changed) |
| 401 | { |
| 402 | dr[0] = th->context.Dr0; |
| 403 | dr[1] = th->context.Dr1; |
| 404 | dr[2] = th->context.Dr2; |
| 405 | dr[3] = th->context.Dr3; |
| 406 | dr[6] = th->context.Dr6; |
| 407 | dr[7] = th->context.Dr7; |
| 408 | } |
| 409 | } |
| 410 | current_thread->reload_context = 0; |
| 411 | } |
| 412 | |
| 413 | if (r == I387_FISEG_REGNUM (tdep)) |
| 414 | { |
| 415 | l = *((long *) context_offset) & 0xffff; |
| 416 | regcache_raw_supply (regcache, r, (char *) &l); |
| 417 | } |
| 418 | else if (r == I387_FOP_REGNUM (tdep)) |
| 419 | { |
| 420 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); |
| 421 | regcache_raw_supply (regcache, r, (char *) &l); |
| 422 | } |
| 423 | else if (r >= 0) |
| 424 | regcache_raw_supply (regcache, r, context_offset); |
| 425 | else |
| 426 | { |
| 427 | for (r = 0; r < gdbarch_num_regs (gdbarch); r++) |
| 428 | do_windows_fetch_inferior_registers (regcache, r); |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | static void |
| 433 | windows_fetch_inferior_registers (struct target_ops *ops, |
| 434 | struct regcache *regcache, int r) |
| 435 | { |
| 436 | current_thread = thread_rec (ptid_get_tid (inferior_ptid), TRUE); |
| 437 | /* Check if current_thread exists. Windows sometimes uses a non-existent |
| 438 | thread id in its events */ |
| 439 | if (current_thread) |
| 440 | do_windows_fetch_inferior_registers (regcache, r); |
| 441 | } |
| 442 | |
| 443 | static void |
| 444 | do_windows_store_inferior_registers (const struct regcache *regcache, int r) |
| 445 | { |
| 446 | if (!current_thread) |
| 447 | /* Windows sometimes uses a non-existent thread id in its events */; |
| 448 | else if (r >= 0) |
| 449 | regcache_raw_collect (regcache, r, |
| 450 | ((char *) ¤t_thread->context) + mappings[r]); |
| 451 | else |
| 452 | { |
| 453 | for (r = 0; r < gdbarch_num_regs (get_regcache_arch (regcache)); r++) |
| 454 | do_windows_store_inferior_registers (regcache, r); |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | /* Store a new register value into the current thread context */ |
| 459 | static void |
| 460 | windows_store_inferior_registers (struct target_ops *ops, |
| 461 | struct regcache *regcache, int r) |
| 462 | { |
| 463 | current_thread = thread_rec (ptid_get_tid (inferior_ptid), TRUE); |
| 464 | /* Check if current_thread exists. Windows sometimes uses a non-existent |
| 465 | thread id in its events */ |
| 466 | if (current_thread) |
| 467 | do_windows_store_inferior_registers (regcache, r); |
| 468 | } |
| 469 | |
| 470 | /* Get the name of a given module at at given base address. If base_address |
| 471 | is zero return the first loaded module (which is always the name of the |
| 472 | executable). */ |
| 473 | static int |
| 474 | get_module_name (LPVOID base_address, char *dll_name_ret) |
| 475 | { |
| 476 | DWORD len; |
| 477 | MODULEINFO mi; |
| 478 | int i; |
| 479 | HMODULE dh_buf[1]; |
| 480 | HMODULE *DllHandle = dh_buf; /* Set to temporary storage for initial query */ |
| 481 | DWORD cbNeeded; |
| 482 | #ifdef __CYGWIN__ |
| 483 | char pathbuf[PATH_MAX + 1]; /* Temporary storage prior to converting to |
| 484 | posix form */ |
| 485 | #else |
| 486 | char *pathbuf = dll_name_ret; /* Just copy directly to passed-in arg */ |
| 487 | #endif |
| 488 | |
| 489 | cbNeeded = 0; |
| 490 | /* Find size of buffer needed to handle list of modules loaded in inferior */ |
| 491 | if (!EnumProcessModules (current_process_handle, DllHandle, |
| 492 | sizeof (HMODULE), &cbNeeded) || !cbNeeded) |
| 493 | goto failed; |
| 494 | |
| 495 | /* Allocate correct amount of space for module list */ |
| 496 | DllHandle = (HMODULE *) alloca (cbNeeded); |
| 497 | if (!DllHandle) |
| 498 | goto failed; |
| 499 | |
| 500 | /* Get the list of modules */ |
| 501 | if (!EnumProcessModules (current_process_handle, DllHandle, cbNeeded, |
| 502 | &cbNeeded)) |
| 503 | goto failed; |
| 504 | |
| 505 | for (i = 0; i < (int) (cbNeeded / sizeof (HMODULE)); i++) |
| 506 | { |
| 507 | /* Get information on this module */ |
| 508 | if (!GetModuleInformation (current_process_handle, DllHandle[i], |
| 509 | &mi, sizeof (mi))) |
| 510 | error (_("Can't get module info")); |
| 511 | |
| 512 | if (!base_address || mi.lpBaseOfDll == base_address) |
| 513 | { |
| 514 | /* Try to find the name of the given module */ |
| 515 | len = GetModuleFileNameExA (current_process_handle, |
| 516 | DllHandle[i], pathbuf, MAX_PATH); |
| 517 | if (len == 0) |
| 518 | error (_("Error getting dll name: %u."), (unsigned) GetLastError ()); |
| 519 | #ifdef __CYGWIN__ |
| 520 | /* Cygwin prefers that the path be in /x/y/z format */ |
| 521 | cygwin_conv_to_full_posix_path (pathbuf, dll_name_ret); |
| 522 | #endif |
| 523 | return 1; /* success */ |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | failed: |
| 528 | dll_name_ret[0] = '\0'; |
| 529 | return 0; /* failure */ |
| 530 | } |
| 531 | |
| 532 | /* Encapsulate the information required in a call to |
| 533 | symbol_file_add_args */ |
| 534 | struct safe_symbol_file_add_args |
| 535 | { |
| 536 | char *name; |
| 537 | int from_tty; |
| 538 | struct section_addr_info *addrs; |
| 539 | int mainline; |
| 540 | int flags; |
| 541 | struct ui_file *err, *out; |
| 542 | struct objfile *ret; |
| 543 | }; |
| 544 | |
| 545 | /* Maintain a linked list of "so" information. */ |
| 546 | struct lm_info |
| 547 | { |
| 548 | LPVOID load_addr; |
| 549 | }; |
| 550 | |
| 551 | static struct so_list solib_start, *solib_end; |
| 552 | |
| 553 | /* Call symbol_file_add with stderr redirected. We don't care if there |
| 554 | are errors. */ |
| 555 | static int |
| 556 | safe_symbol_file_add_stub (void *argv) |
| 557 | { |
| 558 | #define p ((struct safe_symbol_file_add_args *) argv) |
| 559 | const int add_flags = ((p->from_tty ? SYMFILE_VERBOSE : 0) |
| 560 | | (p->mainline ? SYMFILE_MAINLINE : 0)); |
| 561 | p->ret = symbol_file_add (p->name, add_flags, p->addrs, p->flags); |
| 562 | return !!p->ret; |
| 563 | #undef p |
| 564 | } |
| 565 | |
| 566 | /* Restore gdb's stderr after calling symbol_file_add */ |
| 567 | static void |
| 568 | safe_symbol_file_add_cleanup (void *p) |
| 569 | { |
| 570 | #define sp ((struct safe_symbol_file_add_args *)p) |
| 571 | gdb_flush (gdb_stderr); |
| 572 | gdb_flush (gdb_stdout); |
| 573 | ui_file_delete (gdb_stderr); |
| 574 | ui_file_delete (gdb_stdout); |
| 575 | gdb_stderr = sp->err; |
| 576 | gdb_stdout = sp->out; |
| 577 | #undef sp |
| 578 | } |
| 579 | |
| 580 | /* symbol_file_add wrapper that prevents errors from being displayed. */ |
| 581 | static struct objfile * |
| 582 | safe_symbol_file_add (char *name, int from_tty, |
| 583 | struct section_addr_info *addrs, |
| 584 | int mainline, int flags) |
| 585 | { |
| 586 | struct safe_symbol_file_add_args p; |
| 587 | struct cleanup *cleanup; |
| 588 | |
| 589 | cleanup = make_cleanup (safe_symbol_file_add_cleanup, &p); |
| 590 | |
| 591 | p.err = gdb_stderr; |
| 592 | p.out = gdb_stdout; |
| 593 | gdb_flush (gdb_stderr); |
| 594 | gdb_flush (gdb_stdout); |
| 595 | gdb_stderr = ui_file_new (); |
| 596 | gdb_stdout = ui_file_new (); |
| 597 | p.name = name; |
| 598 | p.from_tty = from_tty; |
| 599 | p.addrs = addrs; |
| 600 | p.mainline = mainline; |
| 601 | p.flags = flags; |
| 602 | catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR); |
| 603 | |
| 604 | do_cleanups (cleanup); |
| 605 | return p.ret; |
| 606 | } |
| 607 | |
| 608 | static struct so_list * |
| 609 | windows_make_so (const char *name, LPVOID load_addr) |
| 610 | { |
| 611 | struct so_list *so; |
| 612 | char buf[MAX_PATH + 1]; |
| 613 | char cwd[MAX_PATH + 1]; |
| 614 | char *p; |
| 615 | WIN32_FIND_DATA w32_fd; |
| 616 | HANDLE h = FindFirstFile(name, &w32_fd); |
| 617 | MEMORY_BASIC_INFORMATION m; |
| 618 | |
| 619 | if (h == INVALID_HANDLE_VALUE) |
| 620 | strcpy (buf, name); |
| 621 | else |
| 622 | { |
| 623 | FindClose (h); |
| 624 | strcpy (buf, name); |
| 625 | if (GetCurrentDirectory (MAX_PATH + 1, cwd)) |
| 626 | { |
| 627 | p = strrchr (buf, '\\'); |
| 628 | if (p) |
| 629 | p[1] = '\0'; |
| 630 | SetCurrentDirectory (buf); |
| 631 | GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p); |
| 632 | SetCurrentDirectory (cwd); |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | if (strcasecmp (buf, "ntdll.dll") == 0) |
| 637 | { |
| 638 | GetSystemDirectory (buf, sizeof (buf)); |
| 639 | strcat (buf, "\\ntdll.dll"); |
| 640 | } |
| 641 | so = XZALLOC (struct so_list); |
| 642 | so->lm_info = (struct lm_info *) xmalloc (sizeof (struct lm_info)); |
| 643 | so->lm_info->load_addr = load_addr; |
| 644 | strcpy (so->so_original_name, name); |
| 645 | #ifndef __CYGWIN__ |
| 646 | strcpy (so->so_name, buf); |
| 647 | #else |
| 648 | cygwin_conv_to_posix_path (buf, so->so_name); |
| 649 | /* Record cygwin1.dll .text start/end. */ |
| 650 | p = strchr (so->so_name, '\0') - (sizeof ("/cygwin1.dll") - 1); |
| 651 | if (p >= so->so_name && strcasecmp (p, "/cygwin1.dll") == 0) |
| 652 | { |
| 653 | bfd *abfd; |
| 654 | asection *text = NULL; |
| 655 | CORE_ADDR text_vma; |
| 656 | |
| 657 | abfd = bfd_openr (so->so_name, "pei-i386"); |
| 658 | |
| 659 | if (!abfd) |
| 660 | return so; |
| 661 | |
| 662 | if (bfd_check_format (abfd, bfd_object)) |
| 663 | text = bfd_get_section_by_name (abfd, ".text"); |
| 664 | |
| 665 | if (!text) |
| 666 | { |
| 667 | bfd_close (abfd); |
| 668 | return so; |
| 669 | } |
| 670 | |
| 671 | /* The symbols in a dll are offset by 0x1000, which is the the |
| 672 | offset from 0 of the first byte in an image - because of the |
| 673 | file header and the section alignment. */ |
| 674 | cygwin_load_start = (CORE_ADDR) (uintptr_t) ((char *) load_addr + 0x1000); |
| 675 | cygwin_load_end = cygwin_load_start + bfd_section_size (abfd, text); |
| 676 | |
| 677 | bfd_close (abfd); |
| 678 | } |
| 679 | #endif |
| 680 | |
| 681 | return so; |
| 682 | } |
| 683 | |
| 684 | static char * |
| 685 | get_image_name (HANDLE h, void *address, int unicode) |
| 686 | { |
| 687 | static char buf[(2 * MAX_PATH) + 1]; |
| 688 | DWORD size = unicode ? sizeof (WCHAR) : sizeof (char); |
| 689 | char *address_ptr; |
| 690 | int len = 0; |
| 691 | char b[2]; |
| 692 | SIZE_T done; |
| 693 | |
| 694 | /* Attempt to read the name of the dll that was detected. |
| 695 | This is documented to work only when actively debugging |
| 696 | a program. It will not work for attached processes. */ |
| 697 | if (address == NULL) |
| 698 | return NULL; |
| 699 | |
| 700 | /* See if we could read the address of a string, and that the |
| 701 | address isn't null. */ |
| 702 | if (!ReadProcessMemory (h, address, &address_ptr, sizeof (address_ptr), &done) |
| 703 | || done != sizeof (address_ptr) || !address_ptr) |
| 704 | return NULL; |
| 705 | |
| 706 | /* Find the length of the string */ |
| 707 | while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done) |
| 708 | && (b[0] != 0 || b[size - 1] != 0) && done == size) |
| 709 | continue; |
| 710 | |
| 711 | if (!unicode) |
| 712 | ReadProcessMemory (h, address_ptr, buf, len, &done); |
| 713 | else |
| 714 | { |
| 715 | WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR)); |
| 716 | ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR), |
| 717 | &done); |
| 718 | |
| 719 | WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, len, 0, 0); |
| 720 | } |
| 721 | |
| 722 | return buf; |
| 723 | } |
| 724 | |
| 725 | /* Wait for child to do something. Return pid of child, or -1 in case |
| 726 | of error; store status through argument pointer OURSTATUS. */ |
| 727 | static int |
| 728 | handle_load_dll (void *dummy) |
| 729 | { |
| 730 | LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; |
| 731 | char dll_buf[MAX_PATH + 1]; |
| 732 | char *dll_name = NULL; |
| 733 | |
| 734 | dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; |
| 735 | |
| 736 | if (!get_module_name (event->lpBaseOfDll, dll_buf)) |
| 737 | dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; |
| 738 | |
| 739 | dll_name = dll_buf; |
| 740 | |
| 741 | if (*dll_name == '\0') |
| 742 | dll_name = get_image_name (current_process_handle, |
| 743 | event->lpImageName, event->fUnicode); |
| 744 | if (!dll_name) |
| 745 | return 1; |
| 746 | |
| 747 | solib_end->next = windows_make_so (dll_name, event->lpBaseOfDll); |
| 748 | solib_end = solib_end->next; |
| 749 | |
| 750 | DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end->so_name, |
| 751 | host_address_to_string (solib_end->lm_info->load_addr))); |
| 752 | |
| 753 | return 1; |
| 754 | } |
| 755 | |
| 756 | static void |
| 757 | windows_free_so (struct so_list *so) |
| 758 | { |
| 759 | if (so->lm_info) |
| 760 | xfree (so->lm_info); |
| 761 | xfree (so); |
| 762 | } |
| 763 | |
| 764 | static int |
| 765 | handle_unload_dll (void *dummy) |
| 766 | { |
| 767 | LPVOID lpBaseOfDll = current_event.u.UnloadDll.lpBaseOfDll; |
| 768 | struct so_list *so; |
| 769 | |
| 770 | for (so = &solib_start; so->next != NULL; so = so->next) |
| 771 | if (so->next->lm_info->load_addr == lpBaseOfDll) |
| 772 | { |
| 773 | struct so_list *sodel = so->next; |
| 774 | so->next = sodel->next; |
| 775 | if (!so->next) |
| 776 | solib_end = so; |
| 777 | DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel->so_name)); |
| 778 | |
| 779 | windows_free_so (sodel); |
| 780 | solib_add (NULL, 0, NULL, auto_solib_add); |
| 781 | return 1; |
| 782 | } |
| 783 | |
| 784 | error (_("Error: dll starting at %s not found."), |
| 785 | host_address_to_string (lpBaseOfDll)); |
| 786 | |
| 787 | return 0; |
| 788 | } |
| 789 | |
| 790 | /* Clear list of loaded DLLs. */ |
| 791 | static void |
| 792 | windows_clear_solib (void) |
| 793 | { |
| 794 | solib_start.next = NULL; |
| 795 | solib_end = &solib_start; |
| 796 | } |
| 797 | |
| 798 | /* Load DLL symbol info. */ |
| 799 | void |
| 800 | dll_symbol_command (char *args, int from_tty) |
| 801 | { |
| 802 | int n; |
| 803 | dont_repeat (); |
| 804 | |
| 805 | if (args == NULL) |
| 806 | error (_("dll-symbols requires a file name")); |
| 807 | |
| 808 | n = strlen (args); |
| 809 | if (n > 4 && strcasecmp (args + n - 4, ".dll") != 0) |
| 810 | { |
| 811 | char *newargs = (char *) alloca (n + 4 + 1); |
| 812 | strcpy (newargs, args); |
| 813 | strcat (newargs, ".dll"); |
| 814 | args = newargs; |
| 815 | } |
| 816 | |
| 817 | safe_symbol_file_add (args, from_tty, NULL, 0, OBJF_SHARED | OBJF_USERLOADED); |
| 818 | } |
| 819 | |
| 820 | /* Handle DEBUG_STRING output from child process. |
| 821 | Cygwin prepends its messages with a "cygwin:". Interpret this as |
| 822 | a Cygwin signal. Otherwise just print the string as a warning. */ |
| 823 | static int |
| 824 | handle_output_debug_string (struct target_waitstatus *ourstatus) |
| 825 | { |
| 826 | char *s = NULL; |
| 827 | int retval = 0; |
| 828 | |
| 829 | if (!target_read_string |
| 830 | ((CORE_ADDR) (uintptr_t) current_event.u.DebugString.lpDebugStringData, |
| 831 | &s, 1024, 0) |
| 832 | || !s || !*s) |
| 833 | /* nothing to do */; |
| 834 | else if (strncmp (s, _CYGWIN_SIGNAL_STRING, sizeof (_CYGWIN_SIGNAL_STRING) - 1) != 0) |
| 835 | { |
| 836 | #ifdef __CYGWIN__ |
| 837 | if (strncmp (s, "cYg", 3) != 0) |
| 838 | #endif |
| 839 | warning (("%s"), s); |
| 840 | } |
| 841 | #ifdef __COPY_CONTEXT_SIZE |
| 842 | else |
| 843 | { |
| 844 | /* Got a cygwin signal marker. A cygwin signal is followed by the signal number |
| 845 | itself and then optionally followed by the thread id and address to saved context |
| 846 | within the DLL. If these are supplied, then the given thread is assumed to have |
| 847 | issued the signal and the context from the thread is assumed to be stored at the |
| 848 | given address in the inferior. Tell gdb to treat this like a real signal. */ |
| 849 | char *p; |
| 850 | int sig = strtol (s + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0); |
| 851 | int gotasig = target_signal_from_host (sig); |
| 852 | ourstatus->value.sig = gotasig; |
| 853 | if (gotasig) |
| 854 | { |
| 855 | LPCVOID x; |
| 856 | DWORD n; |
| 857 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 858 | retval = strtoul (p, &p, 0); |
| 859 | if (!retval) |
| 860 | retval = main_thread_id; |
| 861 | else if ((x = (LPCVOID) strtoul (p, &p, 0)) |
| 862 | && ReadProcessMemory (current_process_handle, x, |
| 863 | &saved_context, __COPY_CONTEXT_SIZE, &n) |
| 864 | && n == __COPY_CONTEXT_SIZE) |
| 865 | have_saved_context = 1; |
| 866 | current_event.dwThreadId = retval; |
| 867 | } |
| 868 | } |
| 869 | #endif |
| 870 | |
| 871 | if (s) |
| 872 | xfree (s); |
| 873 | return retval; |
| 874 | } |
| 875 | |
| 876 | static int |
| 877 | display_selector (HANDLE thread, DWORD sel) |
| 878 | { |
| 879 | LDT_ENTRY info; |
| 880 | if (GetThreadSelectorEntry (thread, sel, &info)) |
| 881 | { |
| 882 | int base, limit; |
| 883 | printf_filtered ("0x%03lx: ", sel); |
| 884 | if (!info.HighWord.Bits.Pres) |
| 885 | { |
| 886 | puts_filtered ("Segment not present\n"); |
| 887 | return 0; |
| 888 | } |
| 889 | base = (info.HighWord.Bits.BaseHi << 24) + |
| 890 | (info.HighWord.Bits.BaseMid << 16) |
| 891 | + info.BaseLow; |
| 892 | limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow; |
| 893 | if (info.HighWord.Bits.Granularity) |
| 894 | limit = (limit << 12) | 0xfff; |
| 895 | printf_filtered ("base=0x%08x limit=0x%08x", base, limit); |
| 896 | if (info.HighWord.Bits.Default_Big) |
| 897 | puts_filtered(" 32-bit "); |
| 898 | else |
| 899 | puts_filtered(" 16-bit "); |
| 900 | switch ((info.HighWord.Bits.Type & 0xf) >> 1) |
| 901 | { |
| 902 | case 0: |
| 903 | puts_filtered ("Data (Read-Only, Exp-up"); |
| 904 | break; |
| 905 | case 1: |
| 906 | puts_filtered ("Data (Read/Write, Exp-up"); |
| 907 | break; |
| 908 | case 2: |
| 909 | puts_filtered ("Unused segment ("); |
| 910 | break; |
| 911 | case 3: |
| 912 | puts_filtered ("Data (Read/Write, Exp-down"); |
| 913 | break; |
| 914 | case 4: |
| 915 | puts_filtered ("Code (Exec-Only, N.Conf"); |
| 916 | break; |
| 917 | case 5: |
| 918 | puts_filtered ("Code (Exec/Read, N.Conf"); |
| 919 | break; |
| 920 | case 6: |
| 921 | puts_filtered ("Code (Exec-Only, Conf"); |
| 922 | break; |
| 923 | case 7: |
| 924 | puts_filtered ("Code (Exec/Read, Conf"); |
| 925 | break; |
| 926 | default: |
| 927 | printf_filtered ("Unknown type 0x%x",info.HighWord.Bits.Type); |
| 928 | } |
| 929 | if ((info.HighWord.Bits.Type & 0x1) == 0) |
| 930 | puts_filtered(", N.Acc"); |
| 931 | puts_filtered (")\n"); |
| 932 | if ((info.HighWord.Bits.Type & 0x10) == 0) |
| 933 | puts_filtered("System selector "); |
| 934 | printf_filtered ("Priviledge level = %d. ", info.HighWord.Bits.Dpl); |
| 935 | if (info.HighWord.Bits.Granularity) |
| 936 | puts_filtered ("Page granular.\n"); |
| 937 | else |
| 938 | puts_filtered ("Byte granular.\n"); |
| 939 | return 1; |
| 940 | } |
| 941 | else |
| 942 | { |
| 943 | printf_filtered ("Invalid selector 0x%lx.\n",sel); |
| 944 | return 0; |
| 945 | } |
| 946 | } |
| 947 | |
| 948 | static void |
| 949 | display_selectors (char * args, int from_tty) |
| 950 | { |
| 951 | if (!current_thread) |
| 952 | { |
| 953 | puts_filtered ("Impossible to display selectors now.\n"); |
| 954 | return; |
| 955 | } |
| 956 | if (!args) |
| 957 | { |
| 958 | |
| 959 | puts_filtered ("Selector $cs\n"); |
| 960 | display_selector (current_thread->h, |
| 961 | current_thread->context.SegCs); |
| 962 | puts_filtered ("Selector $ds\n"); |
| 963 | display_selector (current_thread->h, |
| 964 | current_thread->context.SegDs); |
| 965 | puts_filtered ("Selector $es\n"); |
| 966 | display_selector (current_thread->h, |
| 967 | current_thread->context.SegEs); |
| 968 | puts_filtered ("Selector $ss\n"); |
| 969 | display_selector (current_thread->h, |
| 970 | current_thread->context.SegSs); |
| 971 | puts_filtered ("Selector $fs\n"); |
| 972 | display_selector (current_thread->h, |
| 973 | current_thread->context.SegFs); |
| 974 | puts_filtered ("Selector $gs\n"); |
| 975 | display_selector (current_thread->h, |
| 976 | current_thread->context.SegGs); |
| 977 | } |
| 978 | else |
| 979 | { |
| 980 | int sel; |
| 981 | sel = parse_and_eval_long (args); |
| 982 | printf_filtered ("Selector \"%s\"\n",args); |
| 983 | display_selector (current_thread->h, sel); |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | static struct cmd_list_element *info_w32_cmdlist = NULL; |
| 988 | |
| 989 | static void |
| 990 | info_w32_command (char *args, int from_tty) |
| 991 | { |
| 992 | help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout); |
| 993 | } |
| 994 | |
| 995 | |
| 996 | #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \ |
| 997 | printf_unfiltered ("gdb: Target exception %s at %s\n", x, \ |
| 998 | host_address_to_string (\ |
| 999 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)) |
| 1000 | |
| 1001 | static int |
| 1002 | handle_exception (struct target_waitstatus *ourstatus) |
| 1003 | { |
| 1004 | thread_info *th; |
| 1005 | DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode; |
| 1006 | |
| 1007 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 1008 | |
| 1009 | /* Record the context of the current thread */ |
| 1010 | th = thread_rec (current_event.dwThreadId, -1); |
| 1011 | |
| 1012 | switch (code) |
| 1013 | { |
| 1014 | case EXCEPTION_ACCESS_VIOLATION: |
| 1015 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION"); |
| 1016 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
| 1017 | #ifdef __CYGWIN__ |
| 1018 | { |
| 1019 | /* See if the access violation happened within the cygwin DLL itself. Cygwin uses |
| 1020 | a kind of exception handling to deal with passed-in invalid addresses. gdb |
| 1021 | should not treat these as real SEGVs since they will be silently handled by |
| 1022 | cygwin. A real SEGV will (theoretically) be caught by cygwin later in the process |
| 1023 | and will be sent as a cygwin-specific-signal. So, ignore SEGVs if they show up |
| 1024 | within the text segment of the DLL itself. */ |
| 1025 | char *fn; |
| 1026 | CORE_ADDR addr = (CORE_ADDR) (uintptr_t) current_event.u.Exception.ExceptionRecord.ExceptionAddress; |
| 1027 | if ((!cygwin_exceptions && (addr >= cygwin_load_start && addr < cygwin_load_end)) |
| 1028 | || (find_pc_partial_function (addr, &fn, NULL, NULL) |
| 1029 | && strncmp (fn, "KERNEL32!IsBad", strlen ("KERNEL32!IsBad")) == 0)) |
| 1030 | return 0; |
| 1031 | } |
| 1032 | #endif |
| 1033 | break; |
| 1034 | case STATUS_STACK_OVERFLOW: |
| 1035 | DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW"); |
| 1036 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
| 1037 | break; |
| 1038 | case STATUS_FLOAT_DENORMAL_OPERAND: |
| 1039 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND"); |
| 1040 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1041 | break; |
| 1042 | case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: |
| 1043 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED"); |
| 1044 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1045 | break; |
| 1046 | case STATUS_FLOAT_INEXACT_RESULT: |
| 1047 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT"); |
| 1048 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1049 | break; |
| 1050 | case STATUS_FLOAT_INVALID_OPERATION: |
| 1051 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION"); |
| 1052 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1053 | break; |
| 1054 | case STATUS_FLOAT_OVERFLOW: |
| 1055 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW"); |
| 1056 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1057 | break; |
| 1058 | case STATUS_FLOAT_STACK_CHECK: |
| 1059 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK"); |
| 1060 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1061 | break; |
| 1062 | case STATUS_FLOAT_UNDERFLOW: |
| 1063 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW"); |
| 1064 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1065 | break; |
| 1066 | case STATUS_FLOAT_DIVIDE_BY_ZERO: |
| 1067 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO"); |
| 1068 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1069 | break; |
| 1070 | case STATUS_INTEGER_DIVIDE_BY_ZERO: |
| 1071 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO"); |
| 1072 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1073 | break; |
| 1074 | case STATUS_INTEGER_OVERFLOW: |
| 1075 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW"); |
| 1076 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1077 | break; |
| 1078 | case EXCEPTION_BREAKPOINT: |
| 1079 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT"); |
| 1080 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
| 1081 | break; |
| 1082 | case DBG_CONTROL_C: |
| 1083 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C"); |
| 1084 | ourstatus->value.sig = TARGET_SIGNAL_INT; |
| 1085 | break; |
| 1086 | case DBG_CONTROL_BREAK: |
| 1087 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK"); |
| 1088 | ourstatus->value.sig = TARGET_SIGNAL_INT; |
| 1089 | break; |
| 1090 | case EXCEPTION_SINGLE_STEP: |
| 1091 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP"); |
| 1092 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
| 1093 | break; |
| 1094 | case EXCEPTION_ILLEGAL_INSTRUCTION: |
| 1095 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION"); |
| 1096 | ourstatus->value.sig = TARGET_SIGNAL_ILL; |
| 1097 | break; |
| 1098 | case EXCEPTION_PRIV_INSTRUCTION: |
| 1099 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION"); |
| 1100 | ourstatus->value.sig = TARGET_SIGNAL_ILL; |
| 1101 | break; |
| 1102 | case EXCEPTION_NONCONTINUABLE_EXCEPTION: |
| 1103 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION"); |
| 1104 | ourstatus->value.sig = TARGET_SIGNAL_ILL; |
| 1105 | break; |
| 1106 | default: |
| 1107 | /* Treat unhandled first chance exceptions specially. */ |
| 1108 | if (current_event.u.Exception.dwFirstChance) |
| 1109 | return -1; |
| 1110 | printf_unfiltered ("gdb: unknown target exception 0x%08lx at %s\n", |
| 1111 | current_event.u.Exception.ExceptionRecord.ExceptionCode, |
| 1112 | host_address_to_string ( |
| 1113 | current_event.u.Exception.ExceptionRecord.ExceptionAddress)); |
| 1114 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; |
| 1115 | break; |
| 1116 | } |
| 1117 | exception_count++; |
| 1118 | last_sig = ourstatus->value.sig; |
| 1119 | return 1; |
| 1120 | } |
| 1121 | |
| 1122 | /* Resume all artificially suspended threads if we are continuing |
| 1123 | execution */ |
| 1124 | static BOOL |
| 1125 | windows_continue (DWORD continue_status, int id) |
| 1126 | { |
| 1127 | int i; |
| 1128 | thread_info *th; |
| 1129 | BOOL res; |
| 1130 | |
| 1131 | DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, %s);\n", |
| 1132 | current_event.dwProcessId, current_event.dwThreadId, |
| 1133 | continue_status == DBG_CONTINUE ? |
| 1134 | "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED")); |
| 1135 | |
| 1136 | for (th = &thread_head; (th = th->next) != NULL;) |
| 1137 | if ((id == -1 || id == (int) th->id) |
| 1138 | && th->suspended) |
| 1139 | { |
| 1140 | if (debug_registers_changed) |
| 1141 | { |
| 1142 | th->context.ContextFlags |= CONTEXT_DEBUG_REGISTERS; |
| 1143 | th->context.Dr0 = dr[0]; |
| 1144 | th->context.Dr1 = dr[1]; |
| 1145 | th->context.Dr2 = dr[2]; |
| 1146 | th->context.Dr3 = dr[3]; |
| 1147 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 1148 | th->context.Dr7 = dr[7]; |
| 1149 | } |
| 1150 | if (th->context.ContextFlags) |
| 1151 | { |
| 1152 | CHECK (SetThreadContext (th->h, &th->context)); |
| 1153 | th->context.ContextFlags = 0; |
| 1154 | } |
| 1155 | if (th->suspended > 0) |
| 1156 | (void) ResumeThread (th->h); |
| 1157 | th->suspended = 0; |
| 1158 | } |
| 1159 | |
| 1160 | res = ContinueDebugEvent (current_event.dwProcessId, |
| 1161 | current_event.dwThreadId, |
| 1162 | continue_status); |
| 1163 | |
| 1164 | debug_registers_changed = 0; |
| 1165 | return res; |
| 1166 | } |
| 1167 | |
| 1168 | /* Called in pathological case where Windows fails to send a |
| 1169 | CREATE_PROCESS_DEBUG_EVENT after an attach. */ |
| 1170 | static DWORD |
| 1171 | fake_create_process (void) |
| 1172 | { |
| 1173 | current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE, |
| 1174 | current_event.dwProcessId); |
| 1175 | if (current_process_handle != NULL) |
| 1176 | open_process_used = 1; |
| 1177 | else |
| 1178 | { |
| 1179 | error (_("OpenProcess call failed, GetLastError = %lud\n"), |
| 1180 | GetLastError ()); |
| 1181 | /* We can not debug anything in that case. */ |
| 1182 | } |
| 1183 | main_thread_id = current_event.dwThreadId; |
| 1184 | current_thread = windows_add_thread (ptid_build (current_event.dwProcessId, 0, |
| 1185 | current_event.dwThreadId), |
| 1186 | current_event.u.CreateThread.hThread); |
| 1187 | return main_thread_id; |
| 1188 | } |
| 1189 | |
| 1190 | static void |
| 1191 | windows_resume (struct target_ops *ops, |
| 1192 | ptid_t ptid, int step, enum target_signal sig) |
| 1193 | { |
| 1194 | thread_info *th; |
| 1195 | DWORD continue_status = DBG_CONTINUE; |
| 1196 | |
| 1197 | /* A specific PTID means `step only this thread id'. */ |
| 1198 | int resume_all = ptid_equal (ptid, minus_one_ptid); |
| 1199 | |
| 1200 | /* If we're continuing all threads, it's the current inferior that |
| 1201 | should be handled specially. */ |
| 1202 | if (resume_all) |
| 1203 | ptid = inferior_ptid; |
| 1204 | |
| 1205 | if (sig != TARGET_SIGNAL_0) |
| 1206 | { |
| 1207 | if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) |
| 1208 | { |
| 1209 | DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig)); |
| 1210 | } |
| 1211 | else if (sig == last_sig) |
| 1212 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1213 | else |
| 1214 | #if 0 |
| 1215 | /* This code does not seem to work, because |
| 1216 | the kernel does probably not consider changes in the ExceptionRecord |
| 1217 | structure when passing the exception to the inferior. |
| 1218 | Note that this seems possible in the exception handler itself. */ |
| 1219 | { |
| 1220 | int i; |
| 1221 | for (i = 0; xlate[i].them != -1; i++) |
| 1222 | if (xlate[i].us == sig) |
| 1223 | { |
| 1224 | current_event.u.Exception.ExceptionRecord.ExceptionCode = |
| 1225 | xlate[i].them; |
| 1226 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1227 | break; |
| 1228 | } |
| 1229 | if (continue_status == DBG_CONTINUE) |
| 1230 | { |
| 1231 | DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig)); |
| 1232 | } |
| 1233 | } |
| 1234 | #endif |
| 1235 | DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n", |
| 1236 | last_sig)); |
| 1237 | } |
| 1238 | |
| 1239 | last_sig = TARGET_SIGNAL_0; |
| 1240 | |
| 1241 | DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=%ld, step=%d, sig=%d);\n", |
| 1242 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, sig)); |
| 1243 | |
| 1244 | /* Get context for currently selected thread */ |
| 1245 | th = thread_rec (ptid_get_tid (inferior_ptid), FALSE); |
| 1246 | if (th) |
| 1247 | { |
| 1248 | if (step) |
| 1249 | { |
| 1250 | /* Single step by setting t bit */ |
| 1251 | struct regcache *regcache = get_current_regcache (); |
| 1252 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1253 | windows_fetch_inferior_registers (ops, regcache, |
| 1254 | gdbarch_ps_regnum (gdbarch)); |
| 1255 | th->context.EFlags |= FLAG_TRACE_BIT; |
| 1256 | } |
| 1257 | |
| 1258 | if (th->context.ContextFlags) |
| 1259 | { |
| 1260 | if (debug_registers_changed) |
| 1261 | { |
| 1262 | th->context.Dr0 = dr[0]; |
| 1263 | th->context.Dr1 = dr[1]; |
| 1264 | th->context.Dr2 = dr[2]; |
| 1265 | th->context.Dr3 = dr[3]; |
| 1266 | th->context.Dr6 = DR6_CLEAR_VALUE; |
| 1267 | th->context.Dr7 = dr[7]; |
| 1268 | } |
| 1269 | CHECK (SetThreadContext (th->h, &th->context)); |
| 1270 | th->context.ContextFlags = 0; |
| 1271 | } |
| 1272 | } |
| 1273 | |
| 1274 | /* Allow continuing with the same signal that interrupted us. |
| 1275 | Otherwise complain. */ |
| 1276 | |
| 1277 | if (resume_all) |
| 1278 | windows_continue (continue_status, -1); |
| 1279 | else |
| 1280 | windows_continue (continue_status, ptid_get_tid (ptid)); |
| 1281 | } |
| 1282 | |
| 1283 | /* Ctrl-C handler used when the inferior is not run in the same console. The |
| 1284 | handler is in charge of interrupting the inferior using DebugBreakProcess. |
| 1285 | Note that this function is not available prior to Windows XP. In this case |
| 1286 | we emit a warning. */ |
| 1287 | BOOL WINAPI |
| 1288 | ctrl_c_handler (DWORD event_type) |
| 1289 | { |
| 1290 | const int attach_flag = current_inferior ()->attach_flag; |
| 1291 | |
| 1292 | /* Only handle Ctrl-C event. Ignore others. */ |
| 1293 | if (event_type != CTRL_C_EVENT) |
| 1294 | return FALSE; |
| 1295 | |
| 1296 | /* If the inferior and the debugger share the same console, do nothing as |
| 1297 | the inferior has also received the Ctrl-C event. */ |
| 1298 | if (!new_console && !attach_flag) |
| 1299 | return TRUE; |
| 1300 | |
| 1301 | if (!DebugBreakProcess (current_process_handle)) |
| 1302 | warning (_("\ |
| 1303 | Could not interrupt program. Press Ctrl-c in the program console.")); |
| 1304 | |
| 1305 | /* Return true to tell that Ctrl-C has been handled. */ |
| 1306 | return TRUE; |
| 1307 | } |
| 1308 | |
| 1309 | /* Get the next event from the child. Return 1 if the event requires |
| 1310 | handling by WFI (or whatever). */ |
| 1311 | static int |
| 1312 | get_windows_debug_event (struct target_ops *ops, |
| 1313 | int pid, struct target_waitstatus *ourstatus) |
| 1314 | { |
| 1315 | BOOL debug_event; |
| 1316 | DWORD continue_status, event_code; |
| 1317 | thread_info *th; |
| 1318 | static thread_info dummy_thread_info; |
| 1319 | int retval = 0; |
| 1320 | |
| 1321 | last_sig = TARGET_SIGNAL_0; |
| 1322 | |
| 1323 | if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) |
| 1324 | goto out; |
| 1325 | |
| 1326 | event_count++; |
| 1327 | continue_status = DBG_CONTINUE; |
| 1328 | |
| 1329 | event_code = current_event.dwDebugEventCode; |
| 1330 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| 1331 | th = NULL; |
| 1332 | have_saved_context = 0; |
| 1333 | |
| 1334 | switch (event_code) |
| 1335 | { |
| 1336 | case CREATE_THREAD_DEBUG_EVENT: |
| 1337 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n", |
| 1338 | (unsigned) current_event.dwProcessId, |
| 1339 | (unsigned) current_event.dwThreadId, |
| 1340 | "CREATE_THREAD_DEBUG_EVENT")); |
| 1341 | if (saw_create != 1) |
| 1342 | { |
| 1343 | struct inferior *inf; |
| 1344 | inf = find_inferior_pid (current_event.dwProcessId); |
| 1345 | if (!saw_create && inf->attach_flag) |
| 1346 | { |
| 1347 | /* Kludge around a Windows bug where first event is a create |
| 1348 | thread event. Caused when attached process does not have |
| 1349 | a main thread. */ |
| 1350 | retval = fake_create_process (); |
| 1351 | if (retval) |
| 1352 | saw_create++; |
| 1353 | } |
| 1354 | break; |
| 1355 | } |
| 1356 | /* Record the existence of this thread */ |
| 1357 | retval = current_event.dwThreadId; |
| 1358 | th = windows_add_thread (ptid_build (current_event.dwProcessId, 0, |
| 1359 | current_event.dwThreadId), |
| 1360 | current_event.u.CreateThread.hThread); |
| 1361 | break; |
| 1362 | |
| 1363 | case EXIT_THREAD_DEBUG_EVENT: |
| 1364 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1365 | (unsigned) current_event.dwProcessId, |
| 1366 | (unsigned) current_event.dwThreadId, |
| 1367 | "EXIT_THREAD_DEBUG_EVENT")); |
| 1368 | if (current_event.dwThreadId != main_thread_id) |
| 1369 | { |
| 1370 | windows_delete_thread (ptid_build (current_event.dwProcessId, 0, |
| 1371 | current_event.dwThreadId)); |
| 1372 | th = &dummy_thread_info; |
| 1373 | } |
| 1374 | break; |
| 1375 | |
| 1376 | case CREATE_PROCESS_DEBUG_EVENT: |
| 1377 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1378 | (unsigned) current_event.dwProcessId, |
| 1379 | (unsigned) current_event.dwThreadId, |
| 1380 | "CREATE_PROCESS_DEBUG_EVENT")); |
| 1381 | CloseHandle (current_event.u.CreateProcessInfo.hFile); |
| 1382 | if (++saw_create != 1) |
| 1383 | break; |
| 1384 | |
| 1385 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; |
| 1386 | if (main_thread_id) |
| 1387 | windows_delete_thread (ptid_build (current_event.dwProcessId, 0, |
| 1388 | main_thread_id)); |
| 1389 | main_thread_id = current_event.dwThreadId; |
| 1390 | /* Add the main thread */ |
| 1391 | th = windows_add_thread (ptid_build (current_event.dwProcessId, 0, |
| 1392 | current_event.dwThreadId), |
| 1393 | current_event.u.CreateProcessInfo.hThread); |
| 1394 | retval = current_event.dwThreadId; |
| 1395 | break; |
| 1396 | |
| 1397 | case EXIT_PROCESS_DEBUG_EVENT: |
| 1398 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1399 | (unsigned) current_event.dwProcessId, |
| 1400 | (unsigned) current_event.dwThreadId, |
| 1401 | "EXIT_PROCESS_DEBUG_EVENT")); |
| 1402 | if (saw_create != 1) |
| 1403 | break; |
| 1404 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 1405 | ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode; |
| 1406 | retval = main_thread_id; |
| 1407 | break; |
| 1408 | |
| 1409 | case LOAD_DLL_DEBUG_EVENT: |
| 1410 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1411 | (unsigned) current_event.dwProcessId, |
| 1412 | (unsigned) current_event.dwThreadId, |
| 1413 | "LOAD_DLL_DEBUG_EVENT")); |
| 1414 | CloseHandle (current_event.u.LoadDll.hFile); |
| 1415 | if (saw_create != 1) |
| 1416 | break; |
| 1417 | catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL); |
| 1418 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1419 | ourstatus->value.integer = 0; |
| 1420 | retval = main_thread_id; |
| 1421 | break; |
| 1422 | |
| 1423 | case UNLOAD_DLL_DEBUG_EVENT: |
| 1424 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1425 | (unsigned) current_event.dwProcessId, |
| 1426 | (unsigned) current_event.dwThreadId, |
| 1427 | "UNLOAD_DLL_DEBUG_EVENT")); |
| 1428 | if (saw_create != 1) |
| 1429 | break; |
| 1430 | catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL); |
| 1431 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1432 | ourstatus->value.integer = 0; |
| 1433 | retval = main_thread_id; |
| 1434 | break; |
| 1435 | |
| 1436 | case EXCEPTION_DEBUG_EVENT: |
| 1437 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1438 | (unsigned) current_event.dwProcessId, |
| 1439 | (unsigned) current_event.dwThreadId, |
| 1440 | "EXCEPTION_DEBUG_EVENT")); |
| 1441 | if (saw_create != 1) |
| 1442 | break; |
| 1443 | switch (handle_exception (ourstatus)) |
| 1444 | { |
| 1445 | case 0: |
| 1446 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1447 | break; |
| 1448 | case 1: |
| 1449 | retval = current_event.dwThreadId; |
| 1450 | break; |
| 1451 | case -1: |
| 1452 | last_sig = 1; |
| 1453 | continue_status = -1; |
| 1454 | break; |
| 1455 | } |
| 1456 | break; |
| 1457 | |
| 1458 | case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */ |
| 1459 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1460 | (unsigned) current_event.dwProcessId, |
| 1461 | (unsigned) current_event.dwThreadId, |
| 1462 | "OUTPUT_DEBUG_STRING_EVENT")); |
| 1463 | if (saw_create != 1) |
| 1464 | break; |
| 1465 | retval = handle_output_debug_string (ourstatus); |
| 1466 | break; |
| 1467 | |
| 1468 | default: |
| 1469 | if (saw_create != 1) |
| 1470 | break; |
| 1471 | printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n", |
| 1472 | (DWORD) current_event.dwProcessId, |
| 1473 | (DWORD) current_event.dwThreadId); |
| 1474 | printf_unfiltered (" unknown event code %ld\n", |
| 1475 | current_event.dwDebugEventCode); |
| 1476 | break; |
| 1477 | } |
| 1478 | |
| 1479 | if (!retval || saw_create != 1) |
| 1480 | { |
| 1481 | if (continue_status == -1) |
| 1482 | windows_resume (ops, minus_one_ptid, 0, 1); |
| 1483 | else |
| 1484 | CHECK (windows_continue (continue_status, -1)); |
| 1485 | } |
| 1486 | else |
| 1487 | { |
| 1488 | inferior_ptid = ptid_build (current_event.dwProcessId, 0, |
| 1489 | retval); |
| 1490 | current_thread = th ?: thread_rec (current_event.dwThreadId, TRUE); |
| 1491 | } |
| 1492 | |
| 1493 | out: |
| 1494 | return retval; |
| 1495 | } |
| 1496 | |
| 1497 | /* Wait for interesting events to occur in the target process. */ |
| 1498 | static ptid_t |
| 1499 | windows_wait (struct target_ops *ops, |
| 1500 | ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
| 1501 | { |
| 1502 | int pid = -1; |
| 1503 | |
| 1504 | target_terminal_ours (); |
| 1505 | |
| 1506 | /* We loop when we get a non-standard exception rather than return |
| 1507 | with a SPURIOUS because resume can try and step or modify things, |
| 1508 | which needs a current_thread->h. But some of these exceptions mark |
| 1509 | the birth or death of threads, which mean that the current thread |
| 1510 | isn't necessarily what you think it is. */ |
| 1511 | |
| 1512 | while (1) |
| 1513 | { |
| 1514 | int retval; |
| 1515 | |
| 1516 | /* If the user presses Ctrl-c while the debugger is waiting |
| 1517 | for an event, he expects the debugger to interrupt his program |
| 1518 | and to get the prompt back. There are two possible situations: |
| 1519 | |
| 1520 | - The debugger and the program do not share the console, in |
| 1521 | which case the Ctrl-c event only reached the debugger. |
| 1522 | In that case, the ctrl_c handler will take care of interrupting |
| 1523 | the inferior. Note that this case is working starting with |
| 1524 | Windows XP. For Windows 2000, Ctrl-C should be pressed in the |
| 1525 | inferior console. |
| 1526 | |
| 1527 | - The debugger and the program share the same console, in which |
| 1528 | case both debugger and inferior will receive the Ctrl-c event. |
| 1529 | In that case the ctrl_c handler will ignore the event, as the |
| 1530 | Ctrl-c event generated inside the inferior will trigger the |
| 1531 | expected debug event. |
| 1532 | |
| 1533 | FIXME: brobecker/2008-05-20: If the inferior receives the |
| 1534 | signal first and the delay until GDB receives that signal |
| 1535 | is sufficiently long, GDB can sometimes receive the SIGINT |
| 1536 | after we have unblocked the CTRL+C handler. This would |
| 1537 | lead to the debugger stopping prematurely while handling |
| 1538 | the new-thread event that comes with the handling of the SIGINT |
| 1539 | inside the inferior, and then stop again immediately when |
| 1540 | the user tries to resume the execution in the inferior. |
| 1541 | This is a classic race that we should try to fix one day. */ |
| 1542 | SetConsoleCtrlHandler (&ctrl_c_handler, TRUE); |
| 1543 | retval = get_windows_debug_event (ops, pid, ourstatus); |
| 1544 | SetConsoleCtrlHandler (&ctrl_c_handler, FALSE); |
| 1545 | |
| 1546 | if (retval) |
| 1547 | return ptid_build (current_event.dwProcessId, 0, retval); |
| 1548 | else |
| 1549 | { |
| 1550 | int detach = 0; |
| 1551 | |
| 1552 | if (deprecated_ui_loop_hook != NULL) |
| 1553 | detach = deprecated_ui_loop_hook (0); |
| 1554 | |
| 1555 | if (detach) |
| 1556 | windows_kill_inferior (ops); |
| 1557 | } |
| 1558 | } |
| 1559 | } |
| 1560 | |
| 1561 | static void |
| 1562 | do_initial_windows_stuff (struct target_ops *ops, DWORD pid, int attaching) |
| 1563 | { |
| 1564 | extern int stop_after_trap; |
| 1565 | int i; |
| 1566 | struct inferior *inf; |
| 1567 | struct thread_info *tp; |
| 1568 | |
| 1569 | last_sig = TARGET_SIGNAL_0; |
| 1570 | event_count = 0; |
| 1571 | exception_count = 0; |
| 1572 | open_process_used = 0; |
| 1573 | debug_registers_changed = 0; |
| 1574 | debug_registers_used = 0; |
| 1575 | for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++) |
| 1576 | dr[i] = 0; |
| 1577 | #ifdef __CYGWIN__ |
| 1578 | cygwin_load_start = cygwin_load_end = 0; |
| 1579 | #endif |
| 1580 | current_event.dwProcessId = pid; |
| 1581 | memset (¤t_event, 0, sizeof (current_event)); |
| 1582 | push_target (ops); |
| 1583 | disable_breakpoints_in_shlibs (); |
| 1584 | windows_clear_solib (); |
| 1585 | clear_proceed_status (); |
| 1586 | init_wait_for_inferior (); |
| 1587 | |
| 1588 | inf = add_inferior (pid); |
| 1589 | inf->attach_flag = attaching; |
| 1590 | |
| 1591 | /* Make the new process the current inferior, so terminal handling |
| 1592 | can rely on it. When attaching, we don't know about any thread |
| 1593 | id here, but that's OK --- nothing should be referencing the |
| 1594 | current thread until we report an event out of windows_wait. */ |
| 1595 | inferior_ptid = pid_to_ptid (pid); |
| 1596 | |
| 1597 | terminal_init_inferior_with_pgrp (pid); |
| 1598 | target_terminal_inferior (); |
| 1599 | |
| 1600 | inf->stop_soon = STOP_QUIETLY; |
| 1601 | while (1) |
| 1602 | { |
| 1603 | stop_after_trap = 1; |
| 1604 | wait_for_inferior (0); |
| 1605 | tp = inferior_thread (); |
| 1606 | if (tp->stop_signal != TARGET_SIGNAL_TRAP) |
| 1607 | resume (0, tp->stop_signal); |
| 1608 | else |
| 1609 | break; |
| 1610 | } |
| 1611 | |
| 1612 | inf->stop_soon = NO_STOP_QUIETLY; |
| 1613 | stop_after_trap = 0; |
| 1614 | return; |
| 1615 | } |
| 1616 | |
| 1617 | /* Try to set or remove a user privilege to the current process. Return -1 |
| 1618 | if that fails, the previous setting of that privilege otherwise. |
| 1619 | |
| 1620 | This code is copied from the Cygwin source code and rearranged to allow |
| 1621 | dynamically loading of the needed symbols from advapi32 which is only |
| 1622 | available on NT/2K/XP. */ |
| 1623 | static int |
| 1624 | set_process_privilege (const char *privilege, BOOL enable) |
| 1625 | { |
| 1626 | HANDLE token_hdl = NULL; |
| 1627 | LUID restore_priv; |
| 1628 | TOKEN_PRIVILEGES new_priv, orig_priv; |
| 1629 | int ret = -1; |
| 1630 | DWORD size; |
| 1631 | |
| 1632 | if (!OpenProcessToken (GetCurrentProcess (), |
| 1633 | TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, |
| 1634 | &token_hdl)) |
| 1635 | goto out; |
| 1636 | |
| 1637 | if (!LookupPrivilegeValueA (NULL, privilege, &restore_priv)) |
| 1638 | goto out; |
| 1639 | |
| 1640 | new_priv.PrivilegeCount = 1; |
| 1641 | new_priv.Privileges[0].Luid = restore_priv; |
| 1642 | new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0; |
| 1643 | |
| 1644 | if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv, |
| 1645 | sizeof orig_priv, &orig_priv, &size)) |
| 1646 | goto out; |
| 1647 | #if 0 |
| 1648 | /* Disabled, otherwise every `attach' in an unprivileged user session |
| 1649 | would raise the "Failed to get SE_DEBUG_NAME privilege" warning in |
| 1650 | windows_attach(). */ |
| 1651 | /* AdjustTokenPrivileges returns TRUE even if the privilege could not |
| 1652 | be enabled. GetLastError () returns an correct error code, though. */ |
| 1653 | if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED) |
| 1654 | goto out; |
| 1655 | #endif |
| 1656 | |
| 1657 | ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0; |
| 1658 | |
| 1659 | out: |
| 1660 | if (token_hdl) |
| 1661 | CloseHandle (token_hdl); |
| 1662 | |
| 1663 | return ret; |
| 1664 | } |
| 1665 | |
| 1666 | /* Attach to process PID, then initialize for debugging it. */ |
| 1667 | static void |
| 1668 | windows_attach (struct target_ops *ops, char *args, int from_tty) |
| 1669 | { |
| 1670 | BOOL ok; |
| 1671 | DWORD pid; |
| 1672 | |
| 1673 | if (!args) |
| 1674 | error_no_arg (_("process-id to attach")); |
| 1675 | |
| 1676 | if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0) |
| 1677 | { |
| 1678 | printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n"); |
| 1679 | printf_unfiltered ("This can cause attach to fail on Windows NT/2K/XP\n"); |
| 1680 | } |
| 1681 | |
| 1682 | pid = strtoul (args, 0, 0); /* Windows pid */ |
| 1683 | |
| 1684 | windows_init_thread_list (); |
| 1685 | ok = DebugActiveProcess (pid); |
| 1686 | saw_create = 0; |
| 1687 | |
| 1688 | #ifdef __CYGWIN__ |
| 1689 | if (!ok) |
| 1690 | { |
| 1691 | /* Try fall back to Cygwin pid */ |
| 1692 | pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid); |
| 1693 | |
| 1694 | if (pid > 0) |
| 1695 | ok = DebugActiveProcess (pid); |
| 1696 | } |
| 1697 | #endif |
| 1698 | |
| 1699 | if (!ok) |
| 1700 | error (_("Can't attach to process.")); |
| 1701 | |
| 1702 | DebugSetProcessKillOnExit (FALSE); |
| 1703 | |
| 1704 | if (from_tty) |
| 1705 | { |
| 1706 | char *exec_file = (char *) get_exec_file (0); |
| 1707 | |
| 1708 | if (exec_file) |
| 1709 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, |
| 1710 | target_pid_to_str (pid_to_ptid (pid))); |
| 1711 | else |
| 1712 | printf_unfiltered ("Attaching to %s\n", |
| 1713 | target_pid_to_str (pid_to_ptid (pid))); |
| 1714 | |
| 1715 | gdb_flush (gdb_stdout); |
| 1716 | } |
| 1717 | |
| 1718 | do_initial_windows_stuff (ops, pid, 1); |
| 1719 | target_terminal_ours (); |
| 1720 | } |
| 1721 | |
| 1722 | static void |
| 1723 | windows_detach (struct target_ops *ops, char *args, int from_tty) |
| 1724 | { |
| 1725 | int detached = 1; |
| 1726 | |
| 1727 | ptid_t ptid = {-1}; |
| 1728 | windows_resume (ops, ptid, 0, TARGET_SIGNAL_0); |
| 1729 | |
| 1730 | if (!DebugActiveProcessStop (current_event.dwProcessId)) |
| 1731 | { |
| 1732 | error (_("Can't detach process %lu (error %lu)"), |
| 1733 | current_event.dwProcessId, GetLastError ()); |
| 1734 | detached = 0; |
| 1735 | } |
| 1736 | DebugSetProcessKillOnExit (FALSE); |
| 1737 | |
| 1738 | if (detached && from_tty) |
| 1739 | { |
| 1740 | char *exec_file = get_exec_file (0); |
| 1741 | if (exec_file == 0) |
| 1742 | exec_file = ""; |
| 1743 | printf_unfiltered ("Detaching from program: %s, Pid %lu\n", exec_file, |
| 1744 | current_event.dwProcessId); |
| 1745 | gdb_flush (gdb_stdout); |
| 1746 | } |
| 1747 | |
| 1748 | inferior_ptid = null_ptid; |
| 1749 | detach_inferior (current_event.dwProcessId); |
| 1750 | |
| 1751 | unpush_target (ops); |
| 1752 | } |
| 1753 | |
| 1754 | static char * |
| 1755 | windows_pid_to_exec_file (int pid) |
| 1756 | { |
| 1757 | static char path[MAX_PATH + 1]; |
| 1758 | |
| 1759 | #ifdef __CYGWIN__ |
| 1760 | /* Try to find exe name as symlink target of /proc/<pid>/exe */ |
| 1761 | int nchars; |
| 1762 | char procexe[sizeof ("/proc/4294967295/exe")]; |
| 1763 | sprintf (procexe, "/proc/%u/exe", pid); |
| 1764 | nchars = readlink (procexe, path, sizeof(path)); |
| 1765 | if (nchars > 0 && nchars < sizeof (path)) |
| 1766 | { |
| 1767 | path[nchars] = '\0'; /* Got it */ |
| 1768 | return path; |
| 1769 | } |
| 1770 | #endif |
| 1771 | |
| 1772 | /* If we get here then either Cygwin is hosed, this isn't a Cygwin version |
| 1773 | of gdb, or we're trying to debug a non-Cygwin windows executable. */ |
| 1774 | if (!get_module_name (0, path)) |
| 1775 | path[0] = '\0'; |
| 1776 | |
| 1777 | return path; |
| 1778 | } |
| 1779 | |
| 1780 | /* Print status information about what we're accessing. */ |
| 1781 | |
| 1782 | static void |
| 1783 | windows_files_info (struct target_ops *ignore) |
| 1784 | { |
| 1785 | struct inferior *inf = current_inferior (); |
| 1786 | |
| 1787 | printf_unfiltered ("\tUsing the running image of %s %s.\n", |
| 1788 | inf->attach_flag ? "attached" : "child", |
| 1789 | target_pid_to_str (inferior_ptid)); |
| 1790 | } |
| 1791 | |
| 1792 | static void |
| 1793 | windows_open (char *arg, int from_tty) |
| 1794 | { |
| 1795 | error (_("Use the \"run\" command to start a Unix child process.")); |
| 1796 | } |
| 1797 | |
| 1798 | /* Start an inferior windows child process and sets inferior_ptid to its pid. |
| 1799 | EXEC_FILE is the file to run. |
| 1800 | ALLARGS is a string containing the arguments to the program. |
| 1801 | ENV is the environment vector to pass. Errors reported with error(). */ |
| 1802 | |
| 1803 | static void |
| 1804 | windows_create_inferior (struct target_ops *ops, char *exec_file, |
| 1805 | char *allargs, char **in_env, int from_tty) |
| 1806 | { |
| 1807 | STARTUPINFO si; |
| 1808 | PROCESS_INFORMATION pi; |
| 1809 | BOOL ret; |
| 1810 | DWORD flags; |
| 1811 | char *args; |
| 1812 | char real_path[MAXPATHLEN]; |
| 1813 | char *toexec; |
| 1814 | char shell[MAX_PATH + 1]; /* Path to shell */ |
| 1815 | const char *sh; |
| 1816 | #ifdef __CYGWIN__ |
| 1817 | int tty; |
| 1818 | int ostdin, ostdout, ostderr; |
| 1819 | #else |
| 1820 | HANDLE tty; |
| 1821 | #endif |
| 1822 | const char *inferior_io_terminal = get_inferior_io_terminal (); |
| 1823 | |
| 1824 | if (!exec_file) |
| 1825 | error (_("No executable specified, use `target exec'.")); |
| 1826 | |
| 1827 | memset (&si, 0, sizeof (si)); |
| 1828 | si.cb = sizeof (si); |
| 1829 | |
| 1830 | #ifdef __CYGWIN__ |
| 1831 | if (!useshell) |
| 1832 | { |
| 1833 | flags = DEBUG_ONLY_THIS_PROCESS; |
| 1834 | cygwin_conv_to_win32_path (exec_file, real_path); |
| 1835 | toexec = real_path; |
| 1836 | } |
| 1837 | else |
| 1838 | { |
| 1839 | char *newallargs; |
| 1840 | sh = getenv ("SHELL"); |
| 1841 | if (!sh) |
| 1842 | sh = "/bin/sh"; |
| 1843 | cygwin_conv_to_win32_path (sh, shell); |
| 1844 | newallargs = alloca (sizeof (" -c 'exec '") + strlen (exec_file) |
| 1845 | + strlen (allargs) + 2); |
| 1846 | sprintf (newallargs, " -c 'exec %s %s'", exec_file, allargs); |
| 1847 | allargs = newallargs; |
| 1848 | toexec = shell; |
| 1849 | flags = DEBUG_PROCESS; |
| 1850 | } |
| 1851 | #else |
| 1852 | toexec = exec_file; |
| 1853 | flags = DEBUG_ONLY_THIS_PROCESS; |
| 1854 | #endif |
| 1855 | |
| 1856 | if (new_group) |
| 1857 | flags |= CREATE_NEW_PROCESS_GROUP; |
| 1858 | |
| 1859 | if (new_console) |
| 1860 | flags |= CREATE_NEW_CONSOLE; |
| 1861 | |
| 1862 | args = alloca (strlen (toexec) + strlen (allargs) + 2); |
| 1863 | strcpy (args, toexec); |
| 1864 | strcat (args, " "); |
| 1865 | strcat (args, allargs); |
| 1866 | |
| 1867 | #ifdef __CYGWIN__ |
| 1868 | /* Prepare the environment vars for CreateProcess. */ |
| 1869 | cygwin_internal (CW_SYNC_WINENV); |
| 1870 | |
| 1871 | if (!inferior_io_terminal) |
| 1872 | tty = ostdin = ostdout = ostderr = -1; |
| 1873 | else |
| 1874 | { |
| 1875 | tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY); |
| 1876 | if (tty < 0) |
| 1877 | { |
| 1878 | print_sys_errmsg (inferior_io_terminal, errno); |
| 1879 | ostdin = ostdout = ostderr = -1; |
| 1880 | } |
| 1881 | else |
| 1882 | { |
| 1883 | ostdin = dup (0); |
| 1884 | ostdout = dup (1); |
| 1885 | ostderr = dup (2); |
| 1886 | dup2 (tty, 0); |
| 1887 | dup2 (tty, 1); |
| 1888 | dup2 (tty, 2); |
| 1889 | } |
| 1890 | } |
| 1891 | #else |
| 1892 | if (!inferior_io_terminal) |
| 1893 | tty = INVALID_HANDLE_VALUE; |
| 1894 | else |
| 1895 | { |
| 1896 | SECURITY_ATTRIBUTES sa; |
| 1897 | sa.nLength = sizeof(sa); |
| 1898 | sa.lpSecurityDescriptor = 0; |
| 1899 | sa.bInheritHandle = TRUE; |
| 1900 | tty = CreateFileA (inferior_io_terminal, GENERIC_READ | GENERIC_WRITE, |
| 1901 | 0, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); |
| 1902 | if (tty == INVALID_HANDLE_VALUE) |
| 1903 | warning (_("Warning: Failed to open TTY %s, error %#x."), |
| 1904 | inferior_io_terminal, (unsigned) GetLastError ()); |
| 1905 | else |
| 1906 | { |
| 1907 | si.hStdInput = tty; |
| 1908 | si.hStdOutput = tty; |
| 1909 | si.hStdError = tty; |
| 1910 | si.dwFlags |= STARTF_USESTDHANDLES; |
| 1911 | } |
| 1912 | } |
| 1913 | #endif |
| 1914 | |
| 1915 | windows_init_thread_list (); |
| 1916 | ret = CreateProcess (0, |
| 1917 | args, /* command line */ |
| 1918 | NULL, /* Security */ |
| 1919 | NULL, /* thread */ |
| 1920 | TRUE, /* inherit handles */ |
| 1921 | flags, /* start flags */ |
| 1922 | NULL, /* environment */ |
| 1923 | NULL, /* current directory */ |
| 1924 | &si, |
| 1925 | &pi); |
| 1926 | |
| 1927 | #ifdef __CYGWIN__ |
| 1928 | if (tty >= 0) |
| 1929 | { |
| 1930 | close (tty); |
| 1931 | dup2 (ostdin, 0); |
| 1932 | dup2 (ostdout, 1); |
| 1933 | dup2 (ostderr, 2); |
| 1934 | close (ostdin); |
| 1935 | close (ostdout); |
| 1936 | close (ostderr); |
| 1937 | } |
| 1938 | #else |
| 1939 | if (tty != INVALID_HANDLE_VALUE) |
| 1940 | CloseHandle (tty); |
| 1941 | #endif |
| 1942 | |
| 1943 | if (!ret) |
| 1944 | error (_("Error creating process %s, (error %d)."), |
| 1945 | exec_file, (unsigned) GetLastError ()); |
| 1946 | |
| 1947 | CloseHandle (pi.hThread); |
| 1948 | CloseHandle (pi.hProcess); |
| 1949 | |
| 1950 | if (useshell && shell[0] != '\0') |
| 1951 | saw_create = -1; |
| 1952 | else |
| 1953 | saw_create = 0; |
| 1954 | |
| 1955 | do_initial_windows_stuff (ops, pi.dwProcessId, 0); |
| 1956 | |
| 1957 | /* windows_continue (DBG_CONTINUE, -1); */ |
| 1958 | } |
| 1959 | |
| 1960 | static void |
| 1961 | windows_mourn_inferior (struct target_ops *ops) |
| 1962 | { |
| 1963 | (void) windows_continue (DBG_CONTINUE, -1); |
| 1964 | i386_cleanup_dregs(); |
| 1965 | if (open_process_used) |
| 1966 | { |
| 1967 | CHECK (CloseHandle (current_process_handle)); |
| 1968 | open_process_used = 0; |
| 1969 | } |
| 1970 | unpush_target (ops); |
| 1971 | generic_mourn_inferior (); |
| 1972 | } |
| 1973 | |
| 1974 | /* Send a SIGINT to the process group. This acts just like the user typed a |
| 1975 | ^C on the controlling terminal. */ |
| 1976 | |
| 1977 | static void |
| 1978 | windows_stop (ptid_t ptid) |
| 1979 | { |
| 1980 | DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n")); |
| 1981 | CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId)); |
| 1982 | registers_changed (); /* refresh register state */ |
| 1983 | } |
| 1984 | |
| 1985 | static int |
| 1986 | windows_xfer_memory (CORE_ADDR memaddr, gdb_byte *our, int len, |
| 1987 | int write, struct mem_attrib *mem, |
| 1988 | struct target_ops *target) |
| 1989 | { |
| 1990 | SIZE_T done = 0; |
| 1991 | if (write) |
| 1992 | { |
| 1993 | DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08lx\n", |
| 1994 | len, (DWORD) (uintptr_t) memaddr)); |
| 1995 | if (!WriteProcessMemory (current_process_handle, |
| 1996 | (LPVOID) (uintptr_t) memaddr, our, |
| 1997 | len, &done)) |
| 1998 | done = 0; |
| 1999 | FlushInstructionCache (current_process_handle, |
| 2000 | (LPCVOID) (uintptr_t) memaddr, len); |
| 2001 | } |
| 2002 | else |
| 2003 | { |
| 2004 | DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08lx\n", |
| 2005 | len, (DWORD) (uintptr_t) memaddr)); |
| 2006 | if (!ReadProcessMemory (current_process_handle, |
| 2007 | (LPCVOID) (uintptr_t) memaddr, our, |
| 2008 | len, &done)) |
| 2009 | done = 0; |
| 2010 | } |
| 2011 | return done; |
| 2012 | } |
| 2013 | |
| 2014 | static void |
| 2015 | windows_kill_inferior (struct target_ops *ops) |
| 2016 | { |
| 2017 | CHECK (TerminateProcess (current_process_handle, 0)); |
| 2018 | |
| 2019 | for (;;) |
| 2020 | { |
| 2021 | if (!windows_continue (DBG_CONTINUE, -1)) |
| 2022 | break; |
| 2023 | if (!WaitForDebugEvent (¤t_event, INFINITE)) |
| 2024 | break; |
| 2025 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) |
| 2026 | break; |
| 2027 | } |
| 2028 | |
| 2029 | target_mourn_inferior (); /* or just windows_mourn_inferior? */ |
| 2030 | } |
| 2031 | |
| 2032 | static void |
| 2033 | windows_prepare_to_store (struct regcache *regcache) |
| 2034 | { |
| 2035 | /* Do nothing, since we can store individual regs */ |
| 2036 | } |
| 2037 | |
| 2038 | static int |
| 2039 | windows_can_run (void) |
| 2040 | { |
| 2041 | return 1; |
| 2042 | } |
| 2043 | |
| 2044 | static void |
| 2045 | windows_close (int x) |
| 2046 | { |
| 2047 | DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n", |
| 2048 | PIDGET (inferior_ptid))); |
| 2049 | } |
| 2050 | |
| 2051 | /* Convert pid to printable format. */ |
| 2052 | static char * |
| 2053 | windows_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| 2054 | { |
| 2055 | static char buf[80]; |
| 2056 | |
| 2057 | if (ptid_get_tid (ptid) != 0) |
| 2058 | { |
| 2059 | snprintf (buf, sizeof (buf), "Thread %d.0x%lx", |
| 2060 | ptid_get_pid (ptid), ptid_get_tid (ptid)); |
| 2061 | return buf; |
| 2062 | } |
| 2063 | |
| 2064 | return normal_pid_to_str (ptid); |
| 2065 | } |
| 2066 | |
| 2067 | static LONGEST |
| 2068 | windows_xfer_shared_libraries (struct target_ops *ops, |
| 2069 | enum target_object object, const char *annex, |
| 2070 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 2071 | ULONGEST offset, LONGEST len) |
| 2072 | { |
| 2073 | struct obstack obstack; |
| 2074 | const char *buf; |
| 2075 | LONGEST len_avail; |
| 2076 | struct so_list *so; |
| 2077 | |
| 2078 | if (writebuf) |
| 2079 | return -1; |
| 2080 | |
| 2081 | obstack_init (&obstack); |
| 2082 | obstack_grow_str (&obstack, "<library-list>\n"); |
| 2083 | for (so = solib_start.next; so; so = so->next) |
| 2084 | windows_xfer_shared_library (so->so_name, (CORE_ADDR) (uintptr_t) so->lm_info->load_addr, |
| 2085 | target_gdbarch, &obstack); |
| 2086 | obstack_grow_str0 (&obstack, "</library-list>\n"); |
| 2087 | |
| 2088 | buf = obstack_finish (&obstack); |
| 2089 | len_avail = strlen (buf); |
| 2090 | if (offset >= len_avail) |
| 2091 | return 0; |
| 2092 | |
| 2093 | if (len > len_avail - offset) |
| 2094 | len = len_avail - offset; |
| 2095 | memcpy (readbuf, buf + offset, len); |
| 2096 | |
| 2097 | obstack_free (&obstack, NULL); |
| 2098 | return len; |
| 2099 | } |
| 2100 | |
| 2101 | static LONGEST |
| 2102 | windows_xfer_partial (struct target_ops *ops, enum target_object object, |
| 2103 | const char *annex, gdb_byte *readbuf, |
| 2104 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) |
| 2105 | { |
| 2106 | switch (object) |
| 2107 | { |
| 2108 | case TARGET_OBJECT_MEMORY: |
| 2109 | if (readbuf) |
| 2110 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
| 2111 | len, 0/*read*/, NULL, ops); |
| 2112 | if (writebuf) |
| 2113 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
| 2114 | len, 1/*write*/, NULL, ops); |
| 2115 | return -1; |
| 2116 | |
| 2117 | case TARGET_OBJECT_LIBRARIES: |
| 2118 | return windows_xfer_shared_libraries (ops, object, annex, readbuf, |
| 2119 | writebuf, offset, len); |
| 2120 | |
| 2121 | default: |
| 2122 | if (ops->beneath != NULL) |
| 2123 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
| 2124 | readbuf, writebuf, offset, len); |
| 2125 | return -1; |
| 2126 | } |
| 2127 | } |
| 2128 | |
| 2129 | static ptid_t |
| 2130 | windows_get_ada_task_ptid (long lwp, long thread) |
| 2131 | { |
| 2132 | return ptid_build (ptid_get_pid (inferior_ptid), 0, lwp); |
| 2133 | } |
| 2134 | |
| 2135 | static void |
| 2136 | init_windows_ops (void) |
| 2137 | { |
| 2138 | windows_ops.to_shortname = "child"; |
| 2139 | windows_ops.to_longname = "Win32 child process"; |
| 2140 | windows_ops.to_doc = "Win32 child process (started by the \"run\" command)."; |
| 2141 | windows_ops.to_open = windows_open; |
| 2142 | windows_ops.to_close = windows_close; |
| 2143 | windows_ops.to_attach = windows_attach; |
| 2144 | windows_ops.to_attach_no_wait = 1; |
| 2145 | windows_ops.to_detach = windows_detach; |
| 2146 | windows_ops.to_resume = windows_resume; |
| 2147 | windows_ops.to_wait = windows_wait; |
| 2148 | windows_ops.to_fetch_registers = windows_fetch_inferior_registers; |
| 2149 | windows_ops.to_store_registers = windows_store_inferior_registers; |
| 2150 | windows_ops.to_prepare_to_store = windows_prepare_to_store; |
| 2151 | windows_ops.deprecated_xfer_memory = windows_xfer_memory; |
| 2152 | windows_ops.to_xfer_partial = windows_xfer_partial; |
| 2153 | windows_ops.to_files_info = windows_files_info; |
| 2154 | windows_ops.to_insert_breakpoint = memory_insert_breakpoint; |
| 2155 | windows_ops.to_remove_breakpoint = memory_remove_breakpoint; |
| 2156 | windows_ops.to_terminal_init = terminal_init_inferior; |
| 2157 | windows_ops.to_terminal_inferior = terminal_inferior; |
| 2158 | windows_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
| 2159 | windows_ops.to_terminal_ours = terminal_ours; |
| 2160 | windows_ops.to_terminal_save_ours = terminal_save_ours; |
| 2161 | windows_ops.to_terminal_info = child_terminal_info; |
| 2162 | windows_ops.to_kill = windows_kill_inferior; |
| 2163 | windows_ops.to_create_inferior = windows_create_inferior; |
| 2164 | windows_ops.to_mourn_inferior = windows_mourn_inferior; |
| 2165 | windows_ops.to_can_run = windows_can_run; |
| 2166 | windows_ops.to_thread_alive = windows_thread_alive; |
| 2167 | windows_ops.to_pid_to_str = windows_pid_to_str; |
| 2168 | windows_ops.to_stop = windows_stop; |
| 2169 | windows_ops.to_stratum = process_stratum; |
| 2170 | windows_ops.to_has_all_memory = default_child_has_all_memory; |
| 2171 | windows_ops.to_has_memory = default_child_has_memory; |
| 2172 | windows_ops.to_has_stack = default_child_has_stack; |
| 2173 | windows_ops.to_has_registers = default_child_has_registers; |
| 2174 | windows_ops.to_has_execution = default_child_has_execution; |
| 2175 | windows_ops.to_pid_to_exec_file = windows_pid_to_exec_file; |
| 2176 | windows_ops.to_get_ada_task_ptid = windows_get_ada_task_ptid; |
| 2177 | |
| 2178 | i386_use_watchpoints (&windows_ops); |
| 2179 | |
| 2180 | i386_dr_low.set_control = cygwin_set_dr7; |
| 2181 | i386_dr_low.set_addr = cygwin_set_dr; |
| 2182 | i386_dr_low.reset_addr = NULL; |
| 2183 | i386_dr_low.get_status = cygwin_get_dr6; |
| 2184 | |
| 2185 | /* i386_dr_low.debug_register_length field is set by |
| 2186 | calling i386_set_debug_register_length function |
| 2187 | in processor windows specific native file. */ |
| 2188 | |
| 2189 | windows_ops.to_magic = OPS_MAGIC; |
| 2190 | } |
| 2191 | |
| 2192 | static void |
| 2193 | set_windows_aliases (char *argv0) |
| 2194 | { |
| 2195 | add_info_alias ("dll", "sharedlibrary", 1); |
| 2196 | } |
| 2197 | |
| 2198 | void |
| 2199 | _initialize_windows_nat (void) |
| 2200 | { |
| 2201 | struct cmd_list_element *c; |
| 2202 | |
| 2203 | init_windows_ops (); |
| 2204 | |
| 2205 | c = add_com ("dll-symbols", class_files, dll_symbol_command, |
| 2206 | _("Load dll library symbols from FILE.")); |
| 2207 | set_cmd_completer (c, filename_completer); |
| 2208 | |
| 2209 | add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1); |
| 2210 | |
| 2211 | add_com_alias ("add-shared-symbol-files", "dll-symbols", class_alias, 1); |
| 2212 | |
| 2213 | add_com_alias ("assf", "dll-symbols", class_alias, 1); |
| 2214 | |
| 2215 | #ifdef __CYGWIN__ |
| 2216 | add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\ |
| 2217 | Set use of shell to start subprocess."), _("\ |
| 2218 | Show use of shell to start subprocess."), NULL, |
| 2219 | NULL, |
| 2220 | NULL, /* FIXME: i18n: */ |
| 2221 | &setlist, &showlist); |
| 2222 | |
| 2223 | add_setshow_boolean_cmd ("cygwin-exceptions", class_support, &cygwin_exceptions, _("\ |
| 2224 | Break when an exception is detected in the Cygwin DLL itself."), _("\ |
| 2225 | Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL, |
| 2226 | NULL, |
| 2227 | NULL, /* FIXME: i18n: */ |
| 2228 | &setlist, &showlist); |
| 2229 | #endif |
| 2230 | |
| 2231 | add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\ |
| 2232 | Set creation of new console when creating child process."), _("\ |
| 2233 | Show creation of new console when creating child process."), NULL, |
| 2234 | NULL, |
| 2235 | NULL, /* FIXME: i18n: */ |
| 2236 | &setlist, &showlist); |
| 2237 | |
| 2238 | add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\ |
| 2239 | Set creation of new group when creating child process."), _("\ |
| 2240 | Show creation of new group when creating child process."), NULL, |
| 2241 | NULL, |
| 2242 | NULL, /* FIXME: i18n: */ |
| 2243 | &setlist, &showlist); |
| 2244 | |
| 2245 | add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\ |
| 2246 | Set whether to display execution in child process."), _("\ |
| 2247 | Show whether to display execution in child process."), NULL, |
| 2248 | NULL, |
| 2249 | NULL, /* FIXME: i18n: */ |
| 2250 | &setlist, &showlist); |
| 2251 | |
| 2252 | add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\ |
| 2253 | Set whether to display kernel events in child process."), _("\ |
| 2254 | Show whether to display kernel events in child process."), NULL, |
| 2255 | NULL, |
| 2256 | NULL, /* FIXME: i18n: */ |
| 2257 | &setlist, &showlist); |
| 2258 | |
| 2259 | add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\ |
| 2260 | Set whether to display memory accesses in child process."), _("\ |
| 2261 | Show whether to display memory accesses in child process."), NULL, |
| 2262 | NULL, |
| 2263 | NULL, /* FIXME: i18n: */ |
| 2264 | &setlist, &showlist); |
| 2265 | |
| 2266 | add_setshow_boolean_cmd ("debugexceptions", class_support, |
| 2267 | &debug_exceptions, _("\ |
| 2268 | Set whether to display kernel exceptions in child process."), _("\ |
| 2269 | Show whether to display kernel exceptions in child process."), NULL, |
| 2270 | NULL, |
| 2271 | NULL, /* FIXME: i18n: */ |
| 2272 | &setlist, &showlist); |
| 2273 | |
| 2274 | add_prefix_cmd ("w32", class_info, info_w32_command, |
| 2275 | _("Print information specific to Win32 debugging."), |
| 2276 | &info_w32_cmdlist, "info w32 ", 0, &infolist); |
| 2277 | |
| 2278 | add_cmd ("selector", class_info, display_selectors, |
| 2279 | _("Display selectors infos."), |
| 2280 | &info_w32_cmdlist); |
| 2281 | add_target (&windows_ops); |
| 2282 | deprecated_init_ui_hook = set_windows_aliases; |
| 2283 | } |
| 2284 | |
| 2285 | /* Hardware watchpoint support, adapted from go32-nat.c code. */ |
| 2286 | |
| 2287 | /* Pass the address ADDR to the inferior in the I'th debug register. |
| 2288 | Here we just store the address in dr array, the registers will be |
| 2289 | actually set up when windows_continue is called. */ |
| 2290 | static void |
| 2291 | cygwin_set_dr (int i, CORE_ADDR addr) |
| 2292 | { |
| 2293 | if (i < 0 || i > 3) |
| 2294 | internal_error (__FILE__, __LINE__, |
| 2295 | _("Invalid register %d in cygwin_set_dr.\n"), i); |
| 2296 | dr[i] = addr; |
| 2297 | debug_registers_changed = 1; |
| 2298 | debug_registers_used = 1; |
| 2299 | } |
| 2300 | |
| 2301 | /* Pass the value VAL to the inferior in the DR7 debug control |
| 2302 | register. Here we just store the address in D_REGS, the watchpoint |
| 2303 | will be actually set up in windows_wait. */ |
| 2304 | static void |
| 2305 | cygwin_set_dr7 (unsigned long val) |
| 2306 | { |
| 2307 | dr[7] = (CORE_ADDR) val; |
| 2308 | debug_registers_changed = 1; |
| 2309 | debug_registers_used = 1; |
| 2310 | } |
| 2311 | |
| 2312 | /* Get the value of the DR6 debug status register from the inferior. |
| 2313 | Here we just return the value stored in dr[6] |
| 2314 | by the last call to thread_rec for current_event.dwThreadId id. */ |
| 2315 | static unsigned long |
| 2316 | cygwin_get_dr6 (void) |
| 2317 | { |
| 2318 | return (unsigned long) dr[6]; |
| 2319 | } |
| 2320 | |
| 2321 | /* Determine if the thread referenced by "ptid" is alive |
| 2322 | by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0 |
| 2323 | it means that the thread has died. Otherwise it is assumed to be alive. */ |
| 2324 | static int |
| 2325 | windows_thread_alive (struct target_ops *ops, ptid_t ptid) |
| 2326 | { |
| 2327 | int tid; |
| 2328 | |
| 2329 | gdb_assert (ptid_get_tid (ptid) != 0); |
| 2330 | tid = ptid_get_tid (ptid); |
| 2331 | |
| 2332 | return WaitForSingleObject (thread_rec (tid, FALSE)->h, 0) == WAIT_OBJECT_0 ? |
| 2333 | FALSE : TRUE; |
| 2334 | } |
| 2335 | |
| 2336 | void |
| 2337 | _initialize_check_for_gdb_ini (void) |
| 2338 | { |
| 2339 | char *homedir; |
| 2340 | if (inhibit_gdbinit) |
| 2341 | return; |
| 2342 | |
| 2343 | homedir = getenv ("HOME"); |
| 2344 | if (homedir) |
| 2345 | { |
| 2346 | char *p; |
| 2347 | char *oldini = (char *) alloca (strlen (homedir) + |
| 2348 | sizeof ("/gdb.ini")); |
| 2349 | strcpy (oldini, homedir); |
| 2350 | p = strchr (oldini, '\0'); |
| 2351 | if (p > oldini && p[-1] != '/') |
| 2352 | *p++ = '/'; |
| 2353 | strcpy (p, "gdb.ini"); |
| 2354 | if (access (oldini, 0) == 0) |
| 2355 | { |
| 2356 | int len = strlen (oldini); |
| 2357 | char *newini = alloca (len + 1); |
| 2358 | sprintf (newini, "%.*s.gdbinit", |
| 2359 | (int) (len - (sizeof ("gdb.ini") - 1)), oldini); |
| 2360 | warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini); |
| 2361 | } |
| 2362 | } |
| 2363 | } |
| 2364 | |
| 2365 | /* Define dummy functions which always return error for the rare cases where |
| 2366 | these functions could not be found. */ |
| 2367 | static BOOL WINAPI |
| 2368 | bad_DebugActiveProcessStop (DWORD w) |
| 2369 | { |
| 2370 | return FALSE; |
| 2371 | } |
| 2372 | static BOOL WINAPI |
| 2373 | bad_DebugBreakProcess (HANDLE w) |
| 2374 | { |
| 2375 | return FALSE; |
| 2376 | } |
| 2377 | static BOOL WINAPI |
| 2378 | bad_DebugSetProcessKillOnExit (BOOL w) |
| 2379 | { |
| 2380 | return FALSE; |
| 2381 | } |
| 2382 | static BOOL WINAPI |
| 2383 | bad_EnumProcessModules (HANDLE w, HMODULE *x, DWORD y, LPDWORD z) |
| 2384 | { |
| 2385 | return FALSE; |
| 2386 | } |
| 2387 | static DWORD WINAPI |
| 2388 | bad_GetModuleFileNameExA (HANDLE w, HMODULE x, LPSTR y, DWORD z) |
| 2389 | { |
| 2390 | return 0; |
| 2391 | } |
| 2392 | static BOOL WINAPI |
| 2393 | bad_GetModuleInformation (HANDLE w, HMODULE x, LPMODULEINFO y, DWORD z) |
| 2394 | { |
| 2395 | return FALSE; |
| 2396 | } |
| 2397 | |
| 2398 | static BOOL WINAPI |
| 2399 | bad_OpenProcessToken (HANDLE w, DWORD x, PHANDLE y) |
| 2400 | { |
| 2401 | return FALSE; |
| 2402 | } |
| 2403 | |
| 2404 | /* Load any functions which may not be available in ancient versions |
| 2405 | of Windows. */ |
| 2406 | void |
| 2407 | _initialize_loadable (void) |
| 2408 | { |
| 2409 | HMODULE hm = NULL; |
| 2410 | |
| 2411 | hm = LoadLibrary ("kernel32.dll"); |
| 2412 | if (hm) |
| 2413 | { |
| 2414 | dyn_DebugActiveProcessStop = (void *) |
| 2415 | GetProcAddress (hm, "DebugActiveProcessStop"); |
| 2416 | dyn_DebugBreakProcess = (void *) |
| 2417 | GetProcAddress (hm, "DebugBreakProcess"); |
| 2418 | dyn_DebugSetProcessKillOnExit = (void *) |
| 2419 | GetProcAddress (hm, "DebugSetProcessKillOnExit"); |
| 2420 | } |
| 2421 | |
| 2422 | /* Set variables to dummy versions of these processes if the function |
| 2423 | wasn't found in kernel32.dll. */ |
| 2424 | if (!dyn_DebugBreakProcess) |
| 2425 | dyn_DebugBreakProcess = bad_DebugBreakProcess; |
| 2426 | if (!dyn_DebugActiveProcessStop || !dyn_DebugSetProcessKillOnExit) |
| 2427 | { |
| 2428 | dyn_DebugActiveProcessStop = bad_DebugActiveProcessStop; |
| 2429 | dyn_DebugSetProcessKillOnExit = bad_DebugSetProcessKillOnExit; |
| 2430 | } |
| 2431 | |
| 2432 | /* Load optional functions used for retrieving filename information |
| 2433 | associated with the currently debugged process or its dlls. */ |
| 2434 | hm = LoadLibrary ("psapi.dll"); |
| 2435 | if (hm) |
| 2436 | { |
| 2437 | dyn_EnumProcessModules = (void *) |
| 2438 | GetProcAddress (hm, "EnumProcessModules"); |
| 2439 | dyn_GetModuleInformation = (void *) |
| 2440 | GetProcAddress (hm, "GetModuleInformation"); |
| 2441 | dyn_GetModuleFileNameExA = (void *) |
| 2442 | GetProcAddress (hm, "GetModuleFileNameExA"); |
| 2443 | } |
| 2444 | |
| 2445 | if (!dyn_EnumProcessModules || !dyn_GetModuleInformation || !dyn_GetModuleFileNameExA) |
| 2446 | { |
| 2447 | /* Set variables to dummy versions of these processes if the function |
| 2448 | wasn't found in psapi.dll. */ |
| 2449 | dyn_EnumProcessModules = bad_EnumProcessModules; |
| 2450 | dyn_GetModuleInformation = bad_GetModuleInformation; |
| 2451 | dyn_GetModuleFileNameExA = bad_GetModuleFileNameExA; |
| 2452 | /* This will probably fail on Windows 9x/Me. Let the user know that we're |
| 2453 | missing some functionality. */ |
| 2454 | warning(_("cannot automatically find executable file or library to read symbols.\nUse \"file\" or \"dll\" command to load executable/libraries directly.")); |
| 2455 | } |
| 2456 | |
| 2457 | hm = LoadLibrary ("advapi32.dll"); |
| 2458 | if (hm) |
| 2459 | { |
| 2460 | dyn_OpenProcessToken = (void *) |
| 2461 | GetProcAddress (hm, "OpenProcessToken"); |
| 2462 | dyn_LookupPrivilegeValueA = (void *) |
| 2463 | GetProcAddress (hm, "LookupPrivilegeValueA"); |
| 2464 | dyn_AdjustTokenPrivileges = (void *) |
| 2465 | GetProcAddress (hm, "AdjustTokenPrivileges"); |
| 2466 | /* Only need to set one of these since if OpenProcessToken fails nothing |
| 2467 | else is needed. */ |
| 2468 | if (!dyn_OpenProcessToken || !dyn_LookupPrivilegeValueA || !dyn_AdjustTokenPrivileges) |
| 2469 | dyn_OpenProcessToken = bad_OpenProcessToken; |
| 2470 | } |
| 2471 | } |