| 1 | /* Copyright (C) 2008, 2009 Free Software Foundation, Inc. |
| 2 | |
| 3 | This file is part of GDB. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include "defs.h" |
| 19 | #include "command.h" |
| 20 | #include "gdbcmd.h" |
| 21 | #include "target.h" |
| 22 | #include "observer.h" |
| 23 | #include <sys/procfs.h> |
| 24 | #include "gregset.h" |
| 25 | #include "regcache.h" |
| 26 | #include "inferior.h" |
| 27 | #include "gdbthread.h" |
| 28 | |
| 29 | #include <pthread_debug.h> |
| 30 | |
| 31 | /* Print debugging traces if set to non-zero. */ |
| 32 | static int debug_dec_thread = 0; |
| 33 | |
| 34 | /* Non-zero if the dec-thread layer is active. */ |
| 35 | static int dec_thread_active = 0; |
| 36 | |
| 37 | /* The pthread_debug context. */ |
| 38 | pthreadDebugContext_t debug_context; |
| 39 | |
| 40 | /* The dec-thread target_ops structure. */ |
| 41 | static struct target_ops dec_thread_ops; |
| 42 | |
| 43 | /* A copy of the target_ops over which our dec_thread_ops is pushed. */ |
| 44 | static struct target_ops base_target; |
| 45 | |
| 46 | /* Print a debug trace if DEBUG_DEC_THREAD is set (its value is adjusted |
| 47 | by the user using "set debug dec-thread ..."). */ |
| 48 | |
| 49 | static void |
| 50 | debug (char *format, ...) |
| 51 | { |
| 52 | if (debug_dec_thread) |
| 53 | { |
| 54 | va_list args; |
| 55 | |
| 56 | va_start (args, format); |
| 57 | printf_unfiltered ("DEC Threads: "); |
| 58 | vprintf_unfiltered (format, args); |
| 59 | printf_unfiltered ("\n"); |
| 60 | va_end (args); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | /* pthread debug callbacks. */ |
| 65 | |
| 66 | static int |
| 67 | suspend_clbk (void *caller_context) |
| 68 | { |
| 69 | return ESUCCESS; |
| 70 | } |
| 71 | |
| 72 | static int |
| 73 | resume_clbk (void *caller_context) |
| 74 | { |
| 75 | return ESUCCESS; |
| 76 | } |
| 77 | |
| 78 | static int |
| 79 | hold_clbk (void *caller_context, pthreadDebugKId_t kernel_tid) |
| 80 | { |
| 81 | return ESUCCESS; |
| 82 | } |
| 83 | |
| 84 | static int |
| 85 | unhold_clbk (void *caller_context, pthreadDebugKId_t kernel_tid) |
| 86 | { |
| 87 | return ESUCCESS; |
| 88 | } |
| 89 | |
| 90 | static int |
| 91 | read_clbk (void *caller_context, void *address, void *buffer, |
| 92 | unsigned long size) |
| 93 | { |
| 94 | int status = target_read_memory ((CORE_ADDR) address, buffer, size); |
| 95 | |
| 96 | if (status != 0) |
| 97 | return EINVAL; |
| 98 | |
| 99 | return ESUCCESS; |
| 100 | } |
| 101 | |
| 102 | static int |
| 103 | write_clbk (void *caller_context, void *address, void *buffer, |
| 104 | unsigned long size) |
| 105 | { |
| 106 | int status = target_write_memory ((CORE_ADDR) address, buffer, size); |
| 107 | |
| 108 | if (status != 0) |
| 109 | return EINVAL; |
| 110 | |
| 111 | return ESUCCESS; |
| 112 | } |
| 113 | |
| 114 | /* Get integer regs */ |
| 115 | |
| 116 | static int |
| 117 | get_reg_clbk(void *caller_context, pthreadDebugGetRegRtn_t regs, |
| 118 | pthreadDebugKId_t kernel_tid) |
| 119 | { |
| 120 | debug ("get_reg_clbk"); |
| 121 | |
| 122 | /* Not sure that we actually need to do anything in this callback. */ |
| 123 | return ESUCCESS; |
| 124 | } |
| 125 | |
| 126 | /* Set integer regs */ |
| 127 | |
| 128 | static int |
| 129 | set_reg_clbk(void *caller_context, const pthreadDebugRegs_t *regs, |
| 130 | pthreadDebugKId_t kernel_tid) |
| 131 | { |
| 132 | debug ("set_reg_clbk"); |
| 133 | |
| 134 | /* Not sure that we actually need to do anything in this callback. */ |
| 135 | return ESUCCESS; |
| 136 | } |
| 137 | |
| 138 | static int |
| 139 | output_clbk (void *caller_context, char *line) |
| 140 | { |
| 141 | printf_filtered ("%s\n", line); |
| 142 | return ESUCCESS; |
| 143 | } |
| 144 | |
| 145 | static int |
| 146 | error_clbk (void *caller_context, char *line) |
| 147 | { |
| 148 | fprintf_filtered (gdb_stderr, "%s\n", line); |
| 149 | return ESUCCESS; |
| 150 | } |
| 151 | |
| 152 | /* Get floating-point regs. */ |
| 153 | |
| 154 | static int |
| 155 | get_fpreg_clbk (void *caller_context, pthreadDebugFregs_p fregs, |
| 156 | pthreadDebugKId_t kernel_tid) |
| 157 | { |
| 158 | debug ("get_fpreg_clbk"); |
| 159 | |
| 160 | /* Not sure that we actually need to do anything in this callback. */ |
| 161 | return ESUCCESS; |
| 162 | } |
| 163 | |
| 164 | /* Set floating-point regs. */ |
| 165 | |
| 166 | static int |
| 167 | set_fpreg_clbk (void *caller_context, const pthreadDebugFregs_t *fregs, |
| 168 | pthreadDebugKId_t kernel_tid) |
| 169 | { |
| 170 | debug ("set_fpreg_clbk"); |
| 171 | |
| 172 | /* Not sure that we actually need to do anything in this callback. */ |
| 173 | return ESUCCESS; |
| 174 | } |
| 175 | |
| 176 | static void * |
| 177 | malloc_clbk (void *caller_context, size_t size) |
| 178 | { |
| 179 | return xmalloc (size); |
| 180 | } |
| 181 | |
| 182 | static void |
| 183 | free_clbk (void *caller_context, void *address) |
| 184 | { |
| 185 | xfree (address); |
| 186 | } |
| 187 | |
| 188 | static int |
| 189 | kthdinfo_clbk (pthreadDebugClient_t caller_context, |
| 190 | pthreadDebugKId_t kernel_tid, |
| 191 | pthreadDebugKThreadInfo_p thread_info) |
| 192 | { |
| 193 | return ENOTSUP; |
| 194 | } |
| 195 | |
| 196 | static int |
| 197 | speckthd_clbk (pthreadDebugClient_t caller_context, |
| 198 | pthreadDebugSpecialType_t type, |
| 199 | pthreadDebugKId_t *kernel_tid) |
| 200 | { |
| 201 | return ENOTSUP; |
| 202 | } |
| 203 | |
| 204 | static pthreadDebugCallbacks_t debug_callbacks = |
| 205 | { |
| 206 | PTHREAD_DEBUG_VERSION, |
| 207 | (pthreadDebugGetMemRtn_t) read_clbk, |
| 208 | (pthreadDebugSetMemRtn_t) write_clbk, |
| 209 | suspend_clbk, |
| 210 | resume_clbk, |
| 211 | kthdinfo_clbk, |
| 212 | hold_clbk, |
| 213 | unhold_clbk, |
| 214 | (pthreadDebugGetFregRtn_t) get_fpreg_clbk, |
| 215 | (pthreadDebugSetFregRtn_t) set_fpreg_clbk, |
| 216 | (pthreadDebugGetRegRtn_t) get_reg_clbk, |
| 217 | (pthreadDebugSetRegRtn_t) set_reg_clbk, |
| 218 | (pthreadDebugOutputRtn_t) output_clbk, |
| 219 | (pthreadDebugOutputRtn_t) error_clbk, |
| 220 | malloc_clbk, |
| 221 | free_clbk, |
| 222 | speckthd_clbk |
| 223 | }; |
| 224 | |
| 225 | /* Activate thread support if appropriate. Do nothing if thread |
| 226 | support is already active. */ |
| 227 | |
| 228 | static void |
| 229 | enable_dec_thread (void) |
| 230 | { |
| 231 | struct minimal_symbol *msym; |
| 232 | void* caller_context; |
| 233 | int status; |
| 234 | |
| 235 | /* If already active, nothing more to do. */ |
| 236 | if (dec_thread_active) |
| 237 | return; |
| 238 | |
| 239 | msym = lookup_minimal_symbol ("__pthread_dbg_symtable", NULL, NULL); |
| 240 | if (msym == NULL) |
| 241 | { |
| 242 | debug ("enable_dec_thread: No __pthread_dbg_symtable"); |
| 243 | return; |
| 244 | } |
| 245 | |
| 246 | status = pthreadDebugContextInit (&caller_context, &debug_callbacks, |
| 247 | (void *) SYMBOL_VALUE_ADDRESS (msym), |
| 248 | &debug_context); |
| 249 | if (status != ESUCCESS) |
| 250 | { |
| 251 | debug ("enable_dec_thread: pthreadDebugContextInit -> %d", |
| 252 | status); |
| 253 | return; |
| 254 | } |
| 255 | |
| 256 | base_target = current_target; |
| 257 | push_target (&dec_thread_ops); |
| 258 | dec_thread_active = 1; |
| 259 | |
| 260 | debug ("enable_dec_thread: Thread support enabled."); |
| 261 | } |
| 262 | |
| 263 | /* Deactivate thread support. Do nothing is thread support is |
| 264 | already inactive. */ |
| 265 | |
| 266 | static void |
| 267 | disable_dec_thread (void) |
| 268 | { |
| 269 | if (!dec_thread_active) |
| 270 | return; |
| 271 | |
| 272 | pthreadDebugContextDestroy (debug_context); |
| 273 | unpush_target (&dec_thread_ops); |
| 274 | dec_thread_active = 0; |
| 275 | } |
| 276 | |
| 277 | /* A structure that contains a thread ID and is associated |
| 278 | pthreadDebugThreadInfo_t data. */ |
| 279 | |
| 280 | struct dec_thread_info |
| 281 | { |
| 282 | pthreadDebugId_t thread; |
| 283 | pthreadDebugThreadInfo_t info; |
| 284 | }; |
| 285 | typedef struct dec_thread_info dec_thread_info_s; |
| 286 | |
| 287 | /* The list of user threads. */ |
| 288 | |
| 289 | DEF_VEC_O (dec_thread_info_s); |
| 290 | VEC(dec_thread_info_s) *dec_thread_list; |
| 291 | |
| 292 | /* Release the memory used by the given VECP thread list pointer. |
| 293 | Then set *VECP to NULL. */ |
| 294 | |
| 295 | static void |
| 296 | free_dec_thread_info_vec (VEC(dec_thread_info_s) **vecp) |
| 297 | { |
| 298 | int i; |
| 299 | struct dec_thread_info *item; |
| 300 | VEC(dec_thread_info_s) *vec = *vecp; |
| 301 | |
| 302 | for (i = 0; VEC_iterate (dec_thread_info_s, vec, i, item); i++) |
| 303 | xfree (item); |
| 304 | VEC_free (dec_thread_info_s, vec); |
| 305 | *vecp = NULL; |
| 306 | } |
| 307 | |
| 308 | /* Return a thread's ptid given its associated INFO. */ |
| 309 | |
| 310 | static ptid_t |
| 311 | ptid_build_from_info (struct dec_thread_info info) |
| 312 | { |
| 313 | int pid = ptid_get_pid (inferior_ptid); |
| 314 | |
| 315 | return ptid_build (pid, 0, (long) info.thread); |
| 316 | } |
| 317 | |
| 318 | /* Recompute the list of user threads and store the result in |
| 319 | DEC_THREAD_LIST. */ |
| 320 | |
| 321 | static void |
| 322 | update_dec_thread_list (void) |
| 323 | { |
| 324 | pthreadDebugId_t thread; |
| 325 | pthreadDebugThreadInfo_t info; |
| 326 | int res; |
| 327 | |
| 328 | free_dec_thread_info_vec (&dec_thread_list); |
| 329 | res = pthreadDebugThdSeqInit (debug_context, &thread); |
| 330 | while (res == ESUCCESS) |
| 331 | { |
| 332 | |
| 333 | res = pthreadDebugThdGetInfo (debug_context, thread, &info); |
| 334 | if (res != ESUCCESS) |
| 335 | warning (_("unable to get thread info, ignoring thread %ld"), |
| 336 | thread); |
| 337 | else if (info.kind == PTHREAD_DEBUG_THD_KIND_INITIAL |
| 338 | || info.kind == PTHREAD_DEBUG_THD_KIND_NORMAL) |
| 339 | { |
| 340 | struct dec_thread_info *item = |
| 341 | xmalloc (sizeof (struct dec_thread_info)); |
| 342 | |
| 343 | item->thread = thread; |
| 344 | item->info = info; |
| 345 | VEC_safe_push (dec_thread_info_s, dec_thread_list, item); |
| 346 | } |
| 347 | res = pthreadDebugThdSeqNext (debug_context, &thread); |
| 348 | } |
| 349 | pthreadDebugThdSeqDestroy (debug_context); |
| 350 | } |
| 351 | |
| 352 | /* A callback to count the number of threads known to GDB. */ |
| 353 | |
| 354 | static int |
| 355 | dec_thread_count_gdb_threads (struct thread_info *ignored, void *context) |
| 356 | { |
| 357 | int *count = (int *) context; |
| 358 | |
| 359 | *count++; |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | /* A callback that saves the given thread INFO at the end of an |
| 364 | array. The end of the array is given in the CONTEXT and is |
| 365 | incremented once the info has been added. */ |
| 366 | |
| 367 | static int |
| 368 | dec_thread_add_gdb_thread (struct thread_info *info, void *context) |
| 369 | { |
| 370 | struct thread_info ***listp = (struct thread_info ***) context; |
| 371 | |
| 372 | **listp = info; |
| 373 | *listp++; |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | /* Resynchronize the list of threads known by GDB with the actual |
| 378 | list of threads reported by libpthread_debug. */ |
| 379 | |
| 380 | static void |
| 381 | resync_thread_list (void) |
| 382 | { |
| 383 | int i; |
| 384 | struct dec_thread_info *info; |
| 385 | int num_gdb_threads = 0; |
| 386 | struct thread_info **gdb_thread_list; |
| 387 | struct thread_info **next_thread_info; |
| 388 | |
| 389 | update_dec_thread_list (); |
| 390 | |
| 391 | /* Add new threads. */ |
| 392 | |
| 393 | for (i = 0; VEC_iterate (dec_thread_info_s, dec_thread_list, i, info); |
| 394 | i++) |
| 395 | { |
| 396 | ptid_t ptid = ptid_build_from_info (*info); |
| 397 | |
| 398 | if (!in_thread_list (ptid)) |
| 399 | add_thread (ptid); |
| 400 | } |
| 401 | |
| 402 | /* Remove threads that no longer exist. To help with the search, |
| 403 | we build an array of GDB threads, and then iterate over this |
| 404 | array. */ |
| 405 | |
| 406 | iterate_over_threads (dec_thread_count_gdb_threads, |
| 407 | (void *) &num_gdb_threads); |
| 408 | gdb_thread_list = alloca (num_gdb_threads * sizeof (struct thread_info *)); |
| 409 | next_thread_info = gdb_thread_list; |
| 410 | iterate_over_threads (dec_thread_add_gdb_thread, (void *) &next_thread_info); |
| 411 | for (i = 0; i < num_gdb_threads; i++) |
| 412 | { |
| 413 | int j; |
| 414 | |
| 415 | for (j = 0; VEC_iterate (dec_thread_info_s, dec_thread_list, j, info); |
| 416 | j++) |
| 417 | if (ptid_equal (gdb_thread_list[i]->ptid, |
| 418 | ptid_build_from_info (*info))) |
| 419 | break; |
| 420 | delete_thread (gdb_thread_list[i]->ptid); |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | /* The "to_detach" method of the dec_thread_ops. */ |
| 425 | |
| 426 | static void |
| 427 | dec_thread_detach (char *args, int from_tty) |
| 428 | { |
| 429 | debug ("dec_thread_detach"); |
| 430 | |
| 431 | disable_dec_thread (); |
| 432 | base_target.to_detach (&base_target, args, from_tty); |
| 433 | } |
| 434 | |
| 435 | /* Return the ptid of the thread that is currently active. */ |
| 436 | |
| 437 | static ptid_t |
| 438 | get_active_ptid (void) |
| 439 | { |
| 440 | int i; |
| 441 | struct dec_thread_info *info; |
| 442 | |
| 443 | for (i = 0; VEC_iterate (dec_thread_info_s, dec_thread_list, i, info); |
| 444 | i++) |
| 445 | if (info->info.state == PTHREAD_DEBUG_STATE_RUNNING) |
| 446 | return ptid_build_from_info (*info); |
| 447 | |
| 448 | /* No active thread found. This can happen when the program |
| 449 | has just exited. */ |
| 450 | return null_ptid; |
| 451 | } |
| 452 | |
| 453 | /* The "to_wait" method of the dec_thread_ops. */ |
| 454 | |
| 455 | static ptid_t |
| 456 | dec_thread_wait (ptid_t ptid, struct target_waitstatus *status) |
| 457 | { |
| 458 | ptid_t active_ptid; |
| 459 | |
| 460 | debug ("dec_thread_wait"); |
| 461 | |
| 462 | ptid = base_target.to_wait (ptid, status); |
| 463 | |
| 464 | /* The ptid returned by the base_target is the ptid of the process. |
| 465 | We need to find which thread is currently active and return its |
| 466 | ptid. */ |
| 467 | resync_thread_list (); |
| 468 | active_ptid = get_active_ptid (); |
| 469 | if (ptid_equal (active_ptid, null_ptid)) |
| 470 | return ptid; |
| 471 | return active_ptid; |
| 472 | } |
| 473 | |
| 474 | /* Fetch the general purpose and floating point registers for the given |
| 475 | thread TID, and store the result in GREGSET and FPREGSET. Return |
| 476 | zero if successful. */ |
| 477 | |
| 478 | static int |
| 479 | dec_thread_get_regsets (pthreadDebugId_t tid, gdb_gregset_t *gregset, |
| 480 | gdb_fpregset_t *fpregset) |
| 481 | { |
| 482 | int res; |
| 483 | pthreadDebugRegs_t regs; |
| 484 | pthreadDebugFregs_t fregs; |
| 485 | |
| 486 | res = pthreadDebugThdGetReg (debug_context, tid, ®s); |
| 487 | if (res != ESUCCESS) |
| 488 | { |
| 489 | debug ("dec_thread_fetch_registers: pthreadDebugThdGetReg -> %d", res); |
| 490 | return -1; |
| 491 | } |
| 492 | memcpy (gregset->regs, ®s, sizeof (regs)); |
| 493 | |
| 494 | res = pthreadDebugThdGetFreg (debug_context, tid, &fregs); |
| 495 | if (res != ESUCCESS) |
| 496 | { |
| 497 | debug ("dec_thread_fetch_registers: pthreadDebugThdGetFreg -> %d", res); |
| 498 | return -1; |
| 499 | } |
| 500 | memcpy (fpregset->regs, &fregs, sizeof (fregs)); |
| 501 | |
| 502 | return 0; |
| 503 | } |
| 504 | |
| 505 | /* The "to_fetch_registers" method of the dec_thread_ops. |
| 506 | |
| 507 | Because the dec-thread debug API doesn't allow us to fetch |
| 508 | only one register, we simply ignore regno and fetch+supply all |
| 509 | registers. */ |
| 510 | |
| 511 | static void |
| 512 | dec_thread_fetch_registers (struct regcache *regcache, int regno) |
| 513 | { |
| 514 | pthreadDebugId_t tid = ptid_get_tid (inferior_ptid); |
| 515 | gregset_t gregset; |
| 516 | fpregset_t fpregset; |
| 517 | int res; |
| 518 | |
| 519 | debug ("dec_thread_fetch_registers (tid=%ld, regno=%d)", tid, regno); |
| 520 | |
| 521 | |
| 522 | if (tid == 0 || ptid_equal (inferior_ptid, get_active_ptid ())) |
| 523 | { |
| 524 | base_target.to_fetch_registers (regcache, regno); |
| 525 | return; |
| 526 | } |
| 527 | |
| 528 | res = dec_thread_get_regsets (tid, &gregset, &fpregset); |
| 529 | if (res != 0) |
| 530 | return; |
| 531 | |
| 532 | supply_gregset (regcache, &gregset); |
| 533 | supply_fpregset (regcache, &fpregset); |
| 534 | } |
| 535 | |
| 536 | /* Store the registers given in GREGSET and FPREGSET into the associated |
| 537 | general purpose and floating point registers of thread TID. Return |
| 538 | zero if successful. */ |
| 539 | |
| 540 | static int |
| 541 | dec_thread_set_regsets (pthreadDebugId_t tid, gdb_gregset_t gregset, |
| 542 | gdb_fpregset_t fpregset) |
| 543 | { |
| 544 | int res; |
| 545 | pthreadDebugRegs_t regs; |
| 546 | pthreadDebugFregs_t fregs; |
| 547 | |
| 548 | memcpy (®s, gregset.regs, sizeof (regs)); |
| 549 | res = pthreadDebugThdSetReg (debug_context, tid, ®s); |
| 550 | if (res != ESUCCESS) |
| 551 | { |
| 552 | debug ("dec_thread_fetch_registers: pthreadDebugThdSetReg -> %d", res); |
| 553 | return -1; |
| 554 | } |
| 555 | |
| 556 | memcpy (&fregs, fpregset.regs, sizeof (fregs)); |
| 557 | res = pthreadDebugThdSetFreg (debug_context, tid, &fregs); |
| 558 | if (res != ESUCCESS) |
| 559 | { |
| 560 | debug ("dec_thread_fetch_registers: pthreadDebugThdSetFreg -> %d", res); |
| 561 | return -1; |
| 562 | } |
| 563 | |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | /* The "to_store_registers" method of the dec_thread_ops. |
| 568 | |
| 569 | Because the dec-thread debug API doesn't allow us to store |
| 570 | just one register, we store all the registers. */ |
| 571 | |
| 572 | static void |
| 573 | dec_thread_store_registers (struct regcache *regcache, int regno) |
| 574 | { |
| 575 | pthreadDebugId_t tid = ptid_get_tid (inferior_ptid); |
| 576 | gregset_t gregset; |
| 577 | fpregset_t fpregset; |
| 578 | int res; |
| 579 | |
| 580 | debug ("dec_thread_store_registers (tid=%ld, regno=%d)", tid, regno); |
| 581 | |
| 582 | if (tid == 0 || ptid_equal (inferior_ptid, get_active_ptid ())) |
| 583 | { |
| 584 | base_target.to_store_registers (regcache, regno); |
| 585 | return; |
| 586 | } |
| 587 | |
| 588 | /* FIXME: brobecker/2008-05-28: I wonder if we could simply check |
| 589 | in which register set the register is and then only store the |
| 590 | registers for that register set, instead of storing both register |
| 591 | sets. */ |
| 592 | fill_gregset (regcache, &gregset, -1); |
| 593 | fill_fpregset (regcache, &fpregset, -1); |
| 594 | |
| 595 | res = dec_thread_set_regsets (tid, gregset, fpregset); |
| 596 | if (res != 0) |
| 597 | warning (_("failed to store registers.")); |
| 598 | } |
| 599 | |
| 600 | /* The "to_mourn_inferior" method of the dec_thread_ops. */ |
| 601 | |
| 602 | static void |
| 603 | dec_thread_mourn_inferior (void) |
| 604 | { |
| 605 | debug ("dec_thread_mourn_inferior"); |
| 606 | |
| 607 | disable_dec_thread (); |
| 608 | base_target.to_mourn_inferior (&base_target); |
| 609 | } |
| 610 | |
| 611 | /* The "to_thread_alive" method of the dec_thread_ops. */ |
| 612 | static int |
| 613 | dec_thread_thread_alive (ptid_t ptid) |
| 614 | { |
| 615 | debug ("dec_thread_thread_alive (tid=%ld)", ptid_get_tid (ptid)); |
| 616 | |
| 617 | /* The thread list maintained by GDB is up to date, since we update |
| 618 | it everytime we stop. So check this list. */ |
| 619 | return in_thread_list (ptid); |
| 620 | } |
| 621 | |
| 622 | /* The "to_pid_to_str" method of the dec_thread_ops. */ |
| 623 | |
| 624 | static char * |
| 625 | dec_thread_pid_to_str (ptid_t ptid) |
| 626 | { |
| 627 | static char *ret = NULL; |
| 628 | |
| 629 | if (ptid_get_tid (ptid) == 0) |
| 630 | return base_target.to_pid_to_str (ptid); |
| 631 | |
| 632 | /* Free previous return value; a new one will be allocated by |
| 633 | xstrprintf(). */ |
| 634 | xfree (ret); |
| 635 | |
| 636 | ret = xstrprintf (_("Thread %ld"), ptid_get_tid (ptid)); |
| 637 | return ret; |
| 638 | } |
| 639 | |
| 640 | /* A "new-objfile" observer. Used to activate/deactivate dec-thread |
| 641 | support. */ |
| 642 | |
| 643 | static void |
| 644 | dec_thread_new_objfile_observer (struct objfile *objfile) |
| 645 | { |
| 646 | if (objfile != NULL) |
| 647 | enable_dec_thread (); |
| 648 | else |
| 649 | disable_dec_thread (); |
| 650 | } |
| 651 | |
| 652 | static void |
| 653 | init_dec_thread_ops (void) |
| 654 | { |
| 655 | dec_thread_ops.to_shortname = "dec-threads"; |
| 656 | dec_thread_ops.to_longname = _("DEC threads support"); |
| 657 | dec_thread_ops.to_doc = _("DEC threads support"); |
| 658 | dec_thread_ops.to_detach = dec_thread_detach; |
| 659 | dec_thread_ops.to_wait = dec_thread_wait; |
| 660 | dec_thread_ops.to_fetch_registers = dec_thread_fetch_registers; |
| 661 | dec_thread_ops.to_store_registers = dec_thread_store_registers; |
| 662 | dec_thread_ops.to_mourn_inferior = dec_thread_mourn_inferior; |
| 663 | dec_thread_ops.to_thread_alive = dec_thread_thread_alive; |
| 664 | dec_thread_ops.to_pid_to_str = dec_thread_pid_to_str; |
| 665 | dec_thread_ops.to_stratum = thread_stratum; |
| 666 | dec_thread_ops.to_magic = OPS_MAGIC; |
| 667 | } |
| 668 | |
| 669 | void |
| 670 | _initialize_dec_thread (void) |
| 671 | { |
| 672 | init_dec_thread_ops (); |
| 673 | add_target (&dec_thread_ops); |
| 674 | |
| 675 | observer_attach_new_objfile (dec_thread_new_objfile_observer); |
| 676 | |
| 677 | add_setshow_boolean_cmd ("dec-thread", class_maintenance, &debug_dec_thread, |
| 678 | _("Set debugging of DEC threads module."), |
| 679 | _("Show debugging of DEC threads module."), |
| 680 | _("Enables debugging output (used to debug GDB)."), |
| 681 | NULL, NULL, |
| 682 | &setdebuglist, &showdebuglist); |
| 683 | } |