| 1 | /* Interface GDB to the GNU Hurd. |
| 2 | Copyright (C) 1992, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2006, 2007, |
| 3 | 2008, 2009 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | Written by Miles Bader <miles@gnu.ai.mit.edu> |
| 8 | |
| 9 | Some code and ideas from m3-nat.c by Jukka Virtanen <jtv@hut.fi> |
| 10 | |
| 11 | This program is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License as published by |
| 13 | the Free Software Foundation; either version 3 of the License, or |
| 14 | (at your option) any later version. |
| 15 | |
| 16 | This program is distributed in the hope that it will be useful, |
| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | GNU General Public License for more details. |
| 20 | |
| 21 | You should have received a copy of the GNU General Public License |
| 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 23 | */ |
| 24 | |
| 25 | #include <ctype.h> |
| 26 | #include <errno.h> |
| 27 | #include <limits.h> |
| 28 | #include <setjmp.h> |
| 29 | #include <signal.h> |
| 30 | #include <stdio.h> |
| 31 | #include "gdb_string.h" |
| 32 | #include <sys/ptrace.h> |
| 33 | |
| 34 | #include <mach.h> |
| 35 | #include <mach_error.h> |
| 36 | #include <mach/exception.h> |
| 37 | #include <mach/message.h> |
| 38 | #include <mach/notify.h> |
| 39 | #include <mach/vm_attributes.h> |
| 40 | |
| 41 | #include <hurd.h> |
| 42 | #include <hurd/interrupt.h> |
| 43 | #include <hurd/msg.h> |
| 44 | #include <hurd/msg_request.h> |
| 45 | #include <hurd/process.h> |
| 46 | /* Defined in <hurd/process.h>, but we need forward declarations from |
| 47 | <hurd/process_request.h> as well. */ |
| 48 | #undef _process_user_ |
| 49 | #include <hurd/process_request.h> |
| 50 | #include <hurd/signal.h> |
| 51 | #include <hurd/sigpreempt.h> |
| 52 | |
| 53 | #include <portinfo.h> |
| 54 | |
| 55 | #include "defs.h" |
| 56 | #include "inferior.h" |
| 57 | #include "symtab.h" |
| 58 | #include "value.h" |
| 59 | #include "language.h" |
| 60 | #include "target.h" |
| 61 | #include "gdb_wait.h" |
| 62 | #include "gdbcmd.h" |
| 63 | #include "gdbcore.h" |
| 64 | #include "gdbthread.h" |
| 65 | #include "gdb_assert.h" |
| 66 | #include "gdb_obstack.h" |
| 67 | |
| 68 | #include "gnu-nat.h" |
| 69 | |
| 70 | #include "exc_request_S.h" |
| 71 | #include "notify_S.h" |
| 72 | #include "process_reply_S.h" |
| 73 | #include "msg_reply_S.h" |
| 74 | #include "exc_request_U.h" |
| 75 | #include "msg_U.h" |
| 76 | |
| 77 | static process_t proc_server = MACH_PORT_NULL; |
| 78 | |
| 79 | /* If we've sent a proc_wait_request to the proc server, the pid of the |
| 80 | process we asked about. We can only ever have one outstanding. */ |
| 81 | int proc_wait_pid = 0; |
| 82 | |
| 83 | /* The number of wait requests we've sent, and expect replies from. */ |
| 84 | int proc_waits_pending = 0; |
| 85 | |
| 86 | int gnu_debug_flag = 0; |
| 87 | |
| 88 | /* Forward decls */ |
| 89 | |
| 90 | extern struct target_ops gnu_ops; |
| 91 | |
| 92 | struct inf *make_inf (); |
| 93 | void inf_clear_wait (struct inf *inf); |
| 94 | void inf_cleanup (struct inf *inf); |
| 95 | void inf_startup (struct inf *inf, int pid); |
| 96 | int inf_update_suspends (struct inf *inf); |
| 97 | void inf_set_pid (struct inf *inf, pid_t pid); |
| 98 | void inf_validate_procs (struct inf *inf); |
| 99 | void inf_steal_exc_ports (struct inf *inf); |
| 100 | void inf_restore_exc_ports (struct inf *inf); |
| 101 | struct proc *inf_tid_to_proc (struct inf *inf, int tid); |
| 102 | void inf_set_threads_resume_sc (struct inf *inf, |
| 103 | struct proc *run_thread, |
| 104 | int run_others); |
| 105 | int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf); |
| 106 | void inf_suspend (struct inf *inf); |
| 107 | void inf_resume (struct inf *inf); |
| 108 | void inf_set_step_thread (struct inf *inf, struct proc *proc); |
| 109 | void inf_detach (struct inf *inf); |
| 110 | void inf_attach (struct inf *inf, int pid); |
| 111 | void inf_signal (struct inf *inf, enum target_signal sig); |
| 112 | void inf_continue (struct inf *inf); |
| 113 | |
| 114 | #define inf_debug(_inf, msg, args...) \ |
| 115 | do { struct inf *__inf = (_inf); \ |
| 116 | debug ("{inf %d %p}: " msg, __inf->pid, __inf , ##args); } while (0) |
| 117 | |
| 118 | void proc_abort (struct proc *proc, int force); |
| 119 | struct proc *make_proc (struct inf *inf, mach_port_t port, int tid); |
| 120 | struct proc *_proc_free (struct proc *proc); |
| 121 | int proc_update_sc (struct proc *proc); |
| 122 | error_t proc_get_exception_port (struct proc *proc, mach_port_t * port); |
| 123 | error_t proc_set_exception_port (struct proc *proc, mach_port_t port); |
| 124 | static mach_port_t _proc_get_exc_port (struct proc *proc); |
| 125 | void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port); |
| 126 | void proc_restore_exc_port (struct proc *proc); |
| 127 | int proc_trace (struct proc *proc, int set); |
| 128 | |
| 129 | /* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound |
| 130 | to INF's msg port and task port respectively. If it has no msg port, |
| 131 | EIEIO is returned. INF must refer to a running process! */ |
| 132 | #define INF_MSGPORT_RPC(inf, rpc_expr) \ |
| 133 | HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \ |
| 134 | (refport = inf->task->port, 0), 0, \ |
| 135 | msgport ? (rpc_expr) : EIEIO) |
| 136 | |
| 137 | /* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure |
| 138 | there's someone around to deal with the RPC (and resuspend things |
| 139 | afterwards). This effects INF's threads' resume_sc count. */ |
| 140 | #define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \ |
| 141 | (inf_set_threads_resume_sc_for_signal_thread (inf) \ |
| 142 | ? ({ error_t __e; \ |
| 143 | inf_resume (inf); \ |
| 144 | __e = INF_MSGPORT_RPC (inf, rpc_expr); \ |
| 145 | inf_suspend (inf); \ |
| 146 | __e; }) \ |
| 147 | : EIEIO) |
| 148 | |
| 149 | \f |
| 150 | /* The state passed by an exception message. */ |
| 151 | struct exc_state |
| 152 | { |
| 153 | int exception; /* The exception code */ |
| 154 | int code, subcode; |
| 155 | mach_port_t handler; /* The real exception port to handle this. */ |
| 156 | mach_port_t reply; /* The reply port from the exception call. */ |
| 157 | }; |
| 158 | |
| 159 | /* The results of the last wait an inf did. */ |
| 160 | struct inf_wait |
| 161 | { |
| 162 | struct target_waitstatus status; /* The status returned to gdb. */ |
| 163 | struct exc_state exc; /* The exception that caused us to return. */ |
| 164 | struct proc *thread; /* The thread in question. */ |
| 165 | int suppress; /* Something trivial happened. */ |
| 166 | }; |
| 167 | |
| 168 | /* The state of an inferior. */ |
| 169 | struct inf |
| 170 | { |
| 171 | /* Fields describing the current inferior. */ |
| 172 | |
| 173 | struct proc *task; /* The mach task. */ |
| 174 | struct proc *threads; /* A linked list of all threads in TASK. */ |
| 175 | |
| 176 | /* True if THREADS needn't be validated by querying the task. We assume that |
| 177 | we and the task in question are the only ones frobbing the thread list, |
| 178 | so as long as we don't let any code run, we don't have to worry about |
| 179 | THREADS changing. */ |
| 180 | int threads_up_to_date; |
| 181 | |
| 182 | pid_t pid; /* The real system PID. */ |
| 183 | |
| 184 | struct inf_wait wait; /* What to return from target_wait. */ |
| 185 | |
| 186 | /* One thread proc in INF may be in `single-stepping mode'. This is it. */ |
| 187 | struct proc *step_thread; |
| 188 | |
| 189 | /* The thread we think is the signal thread. */ |
| 190 | struct proc *signal_thread; |
| 191 | |
| 192 | mach_port_t event_port; /* Where we receive various msgs. */ |
| 193 | |
| 194 | /* True if we think at least one thread in the inferior could currently be |
| 195 | running. */ |
| 196 | unsigned int running:1; |
| 197 | |
| 198 | /* True if the process has stopped (in the proc server sense). Note that |
| 199 | since a proc server `stop' leaves the signal thread running, the inf can |
| 200 | be RUNNING && STOPPED... */ |
| 201 | unsigned int stopped:1; |
| 202 | |
| 203 | /* True if the inferior has no message port. */ |
| 204 | unsigned int nomsg:1; |
| 205 | |
| 206 | /* True if the inferior is traced. */ |
| 207 | unsigned int traced:1; |
| 208 | |
| 209 | /* True if we shouldn't try waiting for the inferior, usually because we |
| 210 | can't for some reason. */ |
| 211 | unsigned int no_wait:1; |
| 212 | |
| 213 | /* When starting a new inferior, we don't try to validate threads until all |
| 214 | the proper execs have been done. This is a count of how many execs we |
| 215 | expect to happen. */ |
| 216 | unsigned pending_execs; |
| 217 | |
| 218 | /* Fields describing global state */ |
| 219 | |
| 220 | /* The task suspend count used when gdb has control. This is normally 1 to |
| 221 | make things easier for us, but sometimes (like when attaching to vital |
| 222 | system servers) it may be desirable to let the task continue to run |
| 223 | (pausing individual threads as necessary). */ |
| 224 | int pause_sc; |
| 225 | |
| 226 | /* The task suspend count left when detaching from a task. */ |
| 227 | int detach_sc; |
| 228 | |
| 229 | /* The initial values used for the run_sc and pause_sc of newly discovered |
| 230 | threads -- see the definition of those fields in struct proc. */ |
| 231 | int default_thread_run_sc; |
| 232 | int default_thread_pause_sc; |
| 233 | int default_thread_detach_sc; |
| 234 | |
| 235 | /* True if the process should be traced when started/attached. Newly |
| 236 | started processes *must* be traced at first to exec them properly, but |
| 237 | if this is false, tracing is turned off as soon it has done so. */ |
| 238 | int want_signals; |
| 239 | |
| 240 | /* True if exceptions from the inferior process should be trapped. This |
| 241 | must be on to use breakpoints. */ |
| 242 | int want_exceptions; |
| 243 | }; |
| 244 | |
| 245 | |
| 246 | int |
| 247 | __proc_pid (struct proc *proc) |
| 248 | { |
| 249 | return proc->inf->pid; |
| 250 | } |
| 251 | |
| 252 | \f |
| 253 | /* Update PROC's real suspend count to match it's desired one. Returns true |
| 254 | if we think PROC is now in a runnable state. */ |
| 255 | int |
| 256 | proc_update_sc (struct proc *proc) |
| 257 | { |
| 258 | int running; |
| 259 | int err = 0; |
| 260 | int delta = proc->sc - proc->cur_sc; |
| 261 | |
| 262 | if (delta) |
| 263 | proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc); |
| 264 | |
| 265 | if (proc->sc == 0 && proc->state_changed) |
| 266 | /* Since PROC may start running, we must write back any state changes. */ |
| 267 | { |
| 268 | gdb_assert (proc_is_thread (proc)); |
| 269 | proc_debug (proc, "storing back changed thread state"); |
| 270 | err = thread_set_state (proc->port, THREAD_STATE_FLAVOR, |
| 271 | (thread_state_t) &proc->state, THREAD_STATE_SIZE); |
| 272 | if (!err) |
| 273 | proc->state_changed = 0; |
| 274 | } |
| 275 | |
| 276 | if (delta > 0) |
| 277 | { |
| 278 | while (delta-- > 0 && !err) |
| 279 | { |
| 280 | if (proc_is_task (proc)) |
| 281 | err = task_suspend (proc->port); |
| 282 | else |
| 283 | err = thread_suspend (proc->port); |
| 284 | } |
| 285 | } |
| 286 | else |
| 287 | { |
| 288 | while (delta++ < 0 && !err) |
| 289 | { |
| 290 | if (proc_is_task (proc)) |
| 291 | err = task_resume (proc->port); |
| 292 | else |
| 293 | err = thread_resume (proc->port); |
| 294 | } |
| 295 | } |
| 296 | if (!err) |
| 297 | proc->cur_sc = proc->sc; |
| 298 | |
| 299 | /* If we got an error, then the task/thread has disappeared. */ |
| 300 | running = !err && proc->sc == 0; |
| 301 | |
| 302 | proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended"); |
| 303 | if (err) |
| 304 | proc_debug (proc, "err = %s", safe_strerror (err)); |
| 305 | |
| 306 | if (running) |
| 307 | { |
| 308 | proc->aborted = 0; |
| 309 | proc->state_valid = proc->state_changed = 0; |
| 310 | proc->fetched_regs = 0; |
| 311 | } |
| 312 | |
| 313 | return running; |
| 314 | } |
| 315 | |
| 316 | \f |
| 317 | /* Thread_abort is called on PROC if needed. PROC must be a thread proc. |
| 318 | If PROC is deemed `precious', then nothing is done unless FORCE is true. |
| 319 | In particular, a thread is precious if it's running (in which case forcing |
| 320 | it includes suspending it first), or if it has an exception pending. */ |
| 321 | void |
| 322 | proc_abort (struct proc *proc, int force) |
| 323 | { |
| 324 | gdb_assert (proc_is_thread (proc)); |
| 325 | |
| 326 | if (!proc->aborted) |
| 327 | { |
| 328 | struct inf *inf = proc->inf; |
| 329 | int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0); |
| 330 | |
| 331 | if (running && force) |
| 332 | { |
| 333 | proc->sc = 1; |
| 334 | inf_update_suspends (proc->inf); |
| 335 | running = 0; |
| 336 | warning (_("Stopped %s."), proc_string (proc)); |
| 337 | } |
| 338 | else if (proc == inf->wait.thread && inf->wait.exc.reply && !force) |
| 339 | /* An exception is pending on PROC, which don't mess with. */ |
| 340 | running = 1; |
| 341 | |
| 342 | if (!running) |
| 343 | /* We only abort the thread if it's not actually running. */ |
| 344 | { |
| 345 | thread_abort (proc->port); |
| 346 | proc_debug (proc, "aborted"); |
| 347 | proc->aborted = 1; |
| 348 | } |
| 349 | else |
| 350 | proc_debug (proc, "not aborting"); |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | /* Make sure that the state field in PROC is up to date, and return a pointer |
| 355 | to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure |
| 356 | that the thread is stopped and aborted first, and sets the state_changed |
| 357 | field in PROC to true. */ |
| 358 | thread_state_t |
| 359 | proc_get_state (struct proc *proc, int will_modify) |
| 360 | { |
| 361 | int was_aborted = proc->aborted; |
| 362 | |
| 363 | proc_debug (proc, "updating state info%s", |
| 364 | will_modify ? " (with intention to modify)" : ""); |
| 365 | |
| 366 | proc_abort (proc, will_modify); |
| 367 | |
| 368 | if (!was_aborted && proc->aborted) |
| 369 | /* PROC's state may have changed since we last fetched it. */ |
| 370 | proc->state_valid = 0; |
| 371 | |
| 372 | if (!proc->state_valid) |
| 373 | { |
| 374 | mach_msg_type_number_t state_size = THREAD_STATE_SIZE; |
| 375 | error_t err = |
| 376 | thread_get_state (proc->port, THREAD_STATE_FLAVOR, |
| 377 | (thread_state_t) &proc->state, &state_size); |
| 378 | proc_debug (proc, "getting thread state"); |
| 379 | proc->state_valid = !err; |
| 380 | } |
| 381 | |
| 382 | if (proc->state_valid) |
| 383 | { |
| 384 | if (will_modify) |
| 385 | proc->state_changed = 1; |
| 386 | return (thread_state_t) &proc->state; |
| 387 | } |
| 388 | else |
| 389 | return 0; |
| 390 | } |
| 391 | |
| 392 | \f |
| 393 | /* Set PORT to PROC's exception port. */ |
| 394 | error_t |
| 395 | proc_get_exception_port (struct proc * proc, mach_port_t * port) |
| 396 | { |
| 397 | if (proc_is_task (proc)) |
| 398 | return task_get_exception_port (proc->port, port); |
| 399 | else |
| 400 | return thread_get_exception_port (proc->port, port); |
| 401 | } |
| 402 | |
| 403 | /* Set PROC's exception port to PORT. */ |
| 404 | error_t |
| 405 | proc_set_exception_port (struct proc * proc, mach_port_t port) |
| 406 | { |
| 407 | proc_debug (proc, "setting exception port: %d", port); |
| 408 | if (proc_is_task (proc)) |
| 409 | return task_set_exception_port (proc->port, port); |
| 410 | else |
| 411 | return thread_set_exception_port (proc->port, port); |
| 412 | } |
| 413 | |
| 414 | /* Get PROC's exception port, cleaning up a bit if proc has died. */ |
| 415 | static mach_port_t |
| 416 | _proc_get_exc_port (struct proc *proc) |
| 417 | { |
| 418 | mach_port_t exc_port; |
| 419 | error_t err = proc_get_exception_port (proc, &exc_port); |
| 420 | |
| 421 | if (err) |
| 422 | /* PROC must be dead. */ |
| 423 | { |
| 424 | if (proc->exc_port) |
| 425 | mach_port_deallocate (mach_task_self (), proc->exc_port); |
| 426 | proc->exc_port = MACH_PORT_NULL; |
| 427 | if (proc->saved_exc_port) |
| 428 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| 429 | proc->saved_exc_port = MACH_PORT_NULL; |
| 430 | } |
| 431 | |
| 432 | return exc_port; |
| 433 | } |
| 434 | |
| 435 | /* Replace PROC's exception port with EXC_PORT, unless it's already been |
| 436 | done. Stash away any existing exception port so we can restore it later. */ |
| 437 | void |
| 438 | proc_steal_exc_port (struct proc *proc, mach_port_t exc_port) |
| 439 | { |
| 440 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); |
| 441 | |
| 442 | if (cur_exc_port) |
| 443 | { |
| 444 | error_t err = 0; |
| 445 | |
| 446 | proc_debug (proc, "inserting exception port: %d", exc_port); |
| 447 | |
| 448 | if (cur_exc_port != exc_port) |
| 449 | /* Put in our exception port. */ |
| 450 | err = proc_set_exception_port (proc, exc_port); |
| 451 | |
| 452 | if (err || cur_exc_port == proc->exc_port) |
| 453 | /* We previously set the exception port, and it's still set. So we |
| 454 | just keep the old saved port which is what the proc set. */ |
| 455 | { |
| 456 | if (cur_exc_port) |
| 457 | mach_port_deallocate (mach_task_self (), cur_exc_port); |
| 458 | } |
| 459 | else |
| 460 | /* Keep a copy of PROC's old exception port so it can be restored. */ |
| 461 | { |
| 462 | if (proc->saved_exc_port) |
| 463 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| 464 | proc->saved_exc_port = cur_exc_port; |
| 465 | } |
| 466 | |
| 467 | proc_debug (proc, "saved exception port: %d", proc->saved_exc_port); |
| 468 | |
| 469 | if (!err) |
| 470 | proc->exc_port = exc_port; |
| 471 | else |
| 472 | warning (_("Error setting exception port for %s: %s"), |
| 473 | proc_string (proc), safe_strerror (err)); |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | /* If we previously replaced PROC's exception port, put back what we |
| 478 | found there at the time, unless *our* exception port has since been |
| 479 | overwritten, in which case who knows what's going on. */ |
| 480 | void |
| 481 | proc_restore_exc_port (struct proc *proc) |
| 482 | { |
| 483 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); |
| 484 | |
| 485 | if (cur_exc_port) |
| 486 | { |
| 487 | error_t err = 0; |
| 488 | |
| 489 | proc_debug (proc, "restoring real exception port"); |
| 490 | |
| 491 | if (proc->exc_port == cur_exc_port) |
| 492 | /* Our's is still there. */ |
| 493 | err = proc_set_exception_port (proc, proc->saved_exc_port); |
| 494 | |
| 495 | if (proc->saved_exc_port) |
| 496 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| 497 | proc->saved_exc_port = MACH_PORT_NULL; |
| 498 | |
| 499 | if (!err) |
| 500 | proc->exc_port = MACH_PORT_NULL; |
| 501 | else |
| 502 | warning (_("Error setting exception port for %s: %s"), |
| 503 | proc_string (proc), safe_strerror (err)); |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | \f |
| 508 | /* Turns hardware tracing in PROC on or off when SET is true or false, |
| 509 | respectively. Returns true on success. */ |
| 510 | int |
| 511 | proc_trace (struct proc *proc, int set) |
| 512 | { |
| 513 | thread_state_t state = proc_get_state (proc, 1); |
| 514 | |
| 515 | if (!state) |
| 516 | return 0; /* the thread must be dead. */ |
| 517 | |
| 518 | proc_debug (proc, "tracing %s", set ? "on" : "off"); |
| 519 | |
| 520 | if (set) |
| 521 | { |
| 522 | /* XXX We don't get the exception unless the thread has its own |
| 523 | exception port???? */ |
| 524 | if (proc->exc_port == MACH_PORT_NULL) |
| 525 | proc_steal_exc_port (proc, proc->inf->event_port); |
| 526 | THREAD_STATE_SET_TRACED (state); |
| 527 | } |
| 528 | else |
| 529 | THREAD_STATE_CLEAR_TRACED (state); |
| 530 | |
| 531 | return 1; |
| 532 | } |
| 533 | |
| 534 | \f |
| 535 | /* A variable from which to assign new TIDs. */ |
| 536 | static int next_thread_id = 1; |
| 537 | |
| 538 | /* Returns a new proc structure with the given fields. Also adds a |
| 539 | notification for PORT becoming dead to be sent to INF's notify port. */ |
| 540 | struct proc * |
| 541 | make_proc (struct inf *inf, mach_port_t port, int tid) |
| 542 | { |
| 543 | error_t err; |
| 544 | mach_port_t prev_port = MACH_PORT_NULL; |
| 545 | struct proc *proc = xmalloc (sizeof (struct proc)); |
| 546 | |
| 547 | proc->port = port; |
| 548 | proc->tid = tid; |
| 549 | proc->inf = inf; |
| 550 | proc->next = 0; |
| 551 | proc->saved_exc_port = MACH_PORT_NULL; |
| 552 | proc->exc_port = MACH_PORT_NULL; |
| 553 | |
| 554 | proc->sc = 0; |
| 555 | proc->cur_sc = 0; |
| 556 | |
| 557 | /* Note that these are all the values for threads; the task simply uses the |
| 558 | corresponding field in INF directly. */ |
| 559 | proc->run_sc = inf->default_thread_run_sc; |
| 560 | proc->pause_sc = inf->default_thread_pause_sc; |
| 561 | proc->detach_sc = inf->default_thread_detach_sc; |
| 562 | proc->resume_sc = proc->run_sc; |
| 563 | |
| 564 | proc->aborted = 0; |
| 565 | proc->dead = 0; |
| 566 | proc->state_valid = 0; |
| 567 | proc->state_changed = 0; |
| 568 | |
| 569 | proc_debug (proc, "is new"); |
| 570 | |
| 571 | /* Get notified when things die. */ |
| 572 | err = |
| 573 | mach_port_request_notification (mach_task_self (), port, |
| 574 | MACH_NOTIFY_DEAD_NAME, 1, |
| 575 | inf->event_port, |
| 576 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
| 577 | &prev_port); |
| 578 | if (err) |
| 579 | warning (_("Couldn't request notification for port %d: %s"), |
| 580 | port, safe_strerror (err)); |
| 581 | else |
| 582 | { |
| 583 | proc_debug (proc, "notifications to: %d", inf->event_port); |
| 584 | if (prev_port != MACH_PORT_NULL) |
| 585 | mach_port_deallocate (mach_task_self (), prev_port); |
| 586 | } |
| 587 | |
| 588 | if (inf->want_exceptions) |
| 589 | { |
| 590 | if (proc_is_task (proc)) |
| 591 | /* Make the task exception port point to us. */ |
| 592 | proc_steal_exc_port (proc, inf->event_port); |
| 593 | else |
| 594 | /* Just clear thread exception ports -- they default to the |
| 595 | task one. */ |
| 596 | proc_steal_exc_port (proc, MACH_PORT_NULL); |
| 597 | } |
| 598 | |
| 599 | return proc; |
| 600 | } |
| 601 | |
| 602 | /* Frees PROC and any resources it uses, and returns the value of PROC's |
| 603 | next field. */ |
| 604 | struct proc * |
| 605 | _proc_free (struct proc *proc) |
| 606 | { |
| 607 | struct inf *inf = proc->inf; |
| 608 | struct proc *next = proc->next; |
| 609 | |
| 610 | proc_debug (proc, "freeing..."); |
| 611 | |
| 612 | if (proc == inf->step_thread) |
| 613 | /* Turn off single stepping. */ |
| 614 | inf_set_step_thread (inf, 0); |
| 615 | if (proc == inf->wait.thread) |
| 616 | inf_clear_wait (inf); |
| 617 | if (proc == inf->signal_thread) |
| 618 | inf->signal_thread = 0; |
| 619 | |
| 620 | if (proc->port != MACH_PORT_NULL) |
| 621 | { |
| 622 | if (proc->exc_port != MACH_PORT_NULL) |
| 623 | /* Restore the original exception port. */ |
| 624 | proc_restore_exc_port (proc); |
| 625 | if (proc->cur_sc != 0) |
| 626 | /* Resume the thread/task. */ |
| 627 | { |
| 628 | proc->sc = 0; |
| 629 | proc_update_sc (proc); |
| 630 | } |
| 631 | mach_port_deallocate (mach_task_self (), proc->port); |
| 632 | } |
| 633 | |
| 634 | xfree (proc); |
| 635 | return next; |
| 636 | } |
| 637 | |
| 638 | \f |
| 639 | struct inf * |
| 640 | make_inf (void) |
| 641 | { |
| 642 | struct inf *inf = xmalloc (sizeof (struct inf)); |
| 643 | |
| 644 | inf->task = 0; |
| 645 | inf->threads = 0; |
| 646 | inf->threads_up_to_date = 0; |
| 647 | inf->pid = 0; |
| 648 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; |
| 649 | inf->wait.thread = 0; |
| 650 | inf->wait.exc.handler = MACH_PORT_NULL; |
| 651 | inf->wait.exc.reply = MACH_PORT_NULL; |
| 652 | inf->step_thread = 0; |
| 653 | inf->signal_thread = 0; |
| 654 | inf->event_port = MACH_PORT_NULL; |
| 655 | inf->running = 0; |
| 656 | inf->stopped = 0; |
| 657 | inf->nomsg = 1; |
| 658 | inf->traced = 0; |
| 659 | inf->no_wait = 0; |
| 660 | inf->pending_execs = 0; |
| 661 | inf->pause_sc = 1; |
| 662 | inf->detach_sc = 0; |
| 663 | inf->default_thread_run_sc = 0; |
| 664 | inf->default_thread_pause_sc = 0; |
| 665 | inf->default_thread_detach_sc = 0; |
| 666 | inf->want_signals = 1; /* By default */ |
| 667 | inf->want_exceptions = 1; /* By default */ |
| 668 | |
| 669 | return inf; |
| 670 | } |
| 671 | |
| 672 | /* Clear INF's target wait status. */ |
| 673 | void |
| 674 | inf_clear_wait (struct inf *inf) |
| 675 | { |
| 676 | inf_debug (inf, "clearing wait"); |
| 677 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; |
| 678 | inf->wait.thread = 0; |
| 679 | inf->wait.suppress = 0; |
| 680 | if (inf->wait.exc.handler != MACH_PORT_NULL) |
| 681 | { |
| 682 | mach_port_deallocate (mach_task_self (), inf->wait.exc.handler); |
| 683 | inf->wait.exc.handler = MACH_PORT_NULL; |
| 684 | } |
| 685 | if (inf->wait.exc.reply != MACH_PORT_NULL) |
| 686 | { |
| 687 | mach_port_deallocate (mach_task_self (), inf->wait.exc.reply); |
| 688 | inf->wait.exc.reply = MACH_PORT_NULL; |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | \f |
| 693 | void |
| 694 | inf_cleanup (struct inf *inf) |
| 695 | { |
| 696 | inf_debug (inf, "cleanup"); |
| 697 | |
| 698 | inf_clear_wait (inf); |
| 699 | |
| 700 | inf_set_pid (inf, -1); |
| 701 | inf->pid = 0; |
| 702 | inf->running = 0; |
| 703 | inf->stopped = 0; |
| 704 | inf->nomsg = 1; |
| 705 | inf->traced = 0; |
| 706 | inf->no_wait = 0; |
| 707 | inf->pending_execs = 0; |
| 708 | |
| 709 | if (inf->event_port) |
| 710 | { |
| 711 | mach_port_destroy (mach_task_self (), inf->event_port); |
| 712 | inf->event_port = MACH_PORT_NULL; |
| 713 | } |
| 714 | } |
| 715 | |
| 716 | void |
| 717 | inf_startup (struct inf *inf, int pid) |
| 718 | { |
| 719 | error_t err; |
| 720 | |
| 721 | inf_debug (inf, "startup: pid = %d", pid); |
| 722 | |
| 723 | inf_cleanup (inf); |
| 724 | |
| 725 | /* Make the port on which we receive all events. */ |
| 726 | err = mach_port_allocate (mach_task_self (), |
| 727 | MACH_PORT_RIGHT_RECEIVE, &inf->event_port); |
| 728 | if (err) |
| 729 | error (_("Error allocating event port: %s"), safe_strerror (err)); |
| 730 | |
| 731 | /* Make a send right for it, so we can easily copy it for other people. */ |
| 732 | mach_port_insert_right (mach_task_self (), inf->event_port, |
| 733 | inf->event_port, MACH_MSG_TYPE_MAKE_SEND); |
| 734 | inf_set_pid (inf, pid); |
| 735 | } |
| 736 | |
| 737 | \f |
| 738 | /* Close current process, if any, and attach INF to process PORT. */ |
| 739 | void |
| 740 | inf_set_pid (struct inf *inf, pid_t pid) |
| 741 | { |
| 742 | task_t task_port; |
| 743 | struct proc *task = inf->task; |
| 744 | |
| 745 | inf_debug (inf, "setting pid: %d", pid); |
| 746 | |
| 747 | if (pid < 0) |
| 748 | task_port = MACH_PORT_NULL; |
| 749 | else |
| 750 | { |
| 751 | error_t err = proc_pid2task (proc_server, pid, &task_port); |
| 752 | if (err) |
| 753 | error (_("Error getting task for pid %d: %s"), pid, safe_strerror (err)); |
| 754 | } |
| 755 | |
| 756 | inf_debug (inf, "setting task: %d", task_port); |
| 757 | |
| 758 | if (inf->pause_sc) |
| 759 | task_suspend (task_port); |
| 760 | |
| 761 | if (task && task->port != task_port) |
| 762 | { |
| 763 | inf->task = 0; |
| 764 | inf_validate_procs (inf); /* Trash all the threads. */ |
| 765 | _proc_free (task); /* And the task. */ |
| 766 | } |
| 767 | |
| 768 | if (task_port != MACH_PORT_NULL) |
| 769 | { |
| 770 | inf->task = make_proc (inf, task_port, PROC_TID_TASK); |
| 771 | inf->threads_up_to_date = 0; |
| 772 | } |
| 773 | |
| 774 | if (inf->task) |
| 775 | { |
| 776 | inf->pid = pid; |
| 777 | if (inf->pause_sc) |
| 778 | /* Reflect task_suspend above. */ |
| 779 | inf->task->sc = inf->task->cur_sc = 1; |
| 780 | } |
| 781 | else |
| 782 | inf->pid = -1; |
| 783 | } |
| 784 | |
| 785 | \f |
| 786 | /* Validates INF's stopped, nomsg and traced field from the actual |
| 787 | proc server state. Note that the traced field is only updated from |
| 788 | the proc server state if we do not have a message port. If we do |
| 789 | have a message port we'd better look at the tracemask itself. */ |
| 790 | static void |
| 791 | inf_validate_procinfo (struct inf *inf) |
| 792 | { |
| 793 | char *noise; |
| 794 | mach_msg_type_number_t noise_len = 0; |
| 795 | struct procinfo *pi; |
| 796 | mach_msg_type_number_t pi_len = 0; |
| 797 | int info_flags = 0; |
| 798 | error_t err = |
| 799 | proc_getprocinfo (proc_server, inf->pid, &info_flags, |
| 800 | (procinfo_t *) &pi, &pi_len, &noise, &noise_len); |
| 801 | |
| 802 | if (!err) |
| 803 | { |
| 804 | inf->stopped = !!(pi->state & PI_STOPPED); |
| 805 | inf->nomsg = !!(pi->state & PI_NOMSG); |
| 806 | if (inf->nomsg) |
| 807 | inf->traced = !!(pi->state & PI_TRACED); |
| 808 | vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); |
| 809 | if (noise_len > 0) |
| 810 | vm_deallocate (mach_task_self (), (vm_address_t) noise, noise_len); |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | /* Validates INF's task suspend count. If it's higher than we expect, |
| 815 | verify with the user before `stealing' the extra count. */ |
| 816 | static void |
| 817 | inf_validate_task_sc (struct inf *inf) |
| 818 | { |
| 819 | char *noise; |
| 820 | mach_msg_type_number_t noise_len = 0; |
| 821 | struct procinfo *pi; |
| 822 | mach_msg_type_number_t pi_len = 0; |
| 823 | int info_flags = PI_FETCH_TASKINFO; |
| 824 | int suspend_count = -1; |
| 825 | error_t err; |
| 826 | |
| 827 | retry: |
| 828 | err = proc_getprocinfo (proc_server, inf->pid, &info_flags, |
| 829 | (procinfo_t *) &pi, &pi_len, &noise, &noise_len); |
| 830 | if (err) |
| 831 | { |
| 832 | inf->task->dead = 1; /* oh well */ |
| 833 | return; |
| 834 | } |
| 835 | |
| 836 | if (inf->task->cur_sc < pi->taskinfo.suspend_count && suspend_count == -1) |
| 837 | { |
| 838 | /* The proc server might have suspended the task while stopping |
| 839 | it. This happens when the task is handling a traced signal. |
| 840 | Refetch the suspend count. The proc server should be |
| 841 | finished stopping the task by now. */ |
| 842 | suspend_count = pi->taskinfo.suspend_count; |
| 843 | goto retry; |
| 844 | } |
| 845 | |
| 846 | suspend_count = pi->taskinfo.suspend_count; |
| 847 | |
| 848 | vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); |
| 849 | if (noise_len > 0) |
| 850 | vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); |
| 851 | |
| 852 | if (inf->task->cur_sc < suspend_count) |
| 853 | { |
| 854 | int abort; |
| 855 | |
| 856 | target_terminal_ours (); /* Allow I/O. */ |
| 857 | abort = !query ("Pid %d has an additional task suspend count of %d;" |
| 858 | " clear it? ", inf->pid, |
| 859 | suspend_count - inf->task->cur_sc); |
| 860 | target_terminal_inferior (); /* Give it back to the child. */ |
| 861 | |
| 862 | if (abort) |
| 863 | error (_("Additional task suspend count left untouched.")); |
| 864 | |
| 865 | inf->task->cur_sc = suspend_count; |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | /* Turns tracing for INF on or off, depending on ON, unless it already |
| 870 | is. If INF is running, the resume_sc count of INF's threads will |
| 871 | be modified, and the signal thread will briefly be run to change |
| 872 | the trace state. */ |
| 873 | void |
| 874 | inf_set_traced (struct inf *inf, int on) |
| 875 | { |
| 876 | if (on == inf->traced) |
| 877 | return; |
| 878 | |
| 879 | if (inf->task && !inf->task->dead) |
| 880 | /* Make it take effect immediately. */ |
| 881 | { |
| 882 | sigset_t mask = on ? ~(sigset_t) 0 : 0; |
| 883 | error_t err = |
| 884 | INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport, |
| 885 | INIT_TRACEMASK, mask)); |
| 886 | if (err == EIEIO) |
| 887 | { |
| 888 | if (on) |
| 889 | warning (_("Can't modify tracing state for pid %d: %s"), |
| 890 | inf->pid, "No signal thread"); |
| 891 | inf->traced = on; |
| 892 | } |
| 893 | else if (err) |
| 894 | warning (_("Can't modify tracing state for pid %d: %s"), |
| 895 | inf->pid, safe_strerror (err)); |
| 896 | else |
| 897 | inf->traced = on; |
| 898 | } |
| 899 | else |
| 900 | inf->traced = on; |
| 901 | } |
| 902 | |
| 903 | \f |
| 904 | /* Makes all the real suspend count deltas of all the procs in INF |
| 905 | match the desired values. Careful to always do thread/task suspend |
| 906 | counts in the safe order. Returns true if at least one thread is |
| 907 | thought to be running. */ |
| 908 | int |
| 909 | inf_update_suspends (struct inf *inf) |
| 910 | { |
| 911 | struct proc *task = inf->task; |
| 912 | /* We don't have to update INF->threads even though we're iterating over it |
| 913 | because we'll change a thread only if it already has an existing proc |
| 914 | entry. */ |
| 915 | |
| 916 | inf_debug (inf, "updating suspend counts"); |
| 917 | |
| 918 | if (task) |
| 919 | { |
| 920 | struct proc *thread; |
| 921 | int task_running = (task->sc == 0), thread_running = 0; |
| 922 | |
| 923 | if (task->sc > task->cur_sc) |
| 924 | /* The task is becoming _more_ suspended; do before any threads. */ |
| 925 | task_running = proc_update_sc (task); |
| 926 | |
| 927 | if (inf->pending_execs) |
| 928 | /* When we're waiting for an exec, things may be happening behind our |
| 929 | back, so be conservative. */ |
| 930 | thread_running = 1; |
| 931 | |
| 932 | /* Do all the thread suspend counts. */ |
| 933 | for (thread = inf->threads; thread; thread = thread->next) |
| 934 | thread_running |= proc_update_sc (thread); |
| 935 | |
| 936 | if (task->sc != task->cur_sc) |
| 937 | /* We didn't do the task first, because we wanted to wait for the |
| 938 | threads; do it now. */ |
| 939 | task_running = proc_update_sc (task); |
| 940 | |
| 941 | inf_debug (inf, "%srunning...", |
| 942 | (thread_running && task_running) ? "" : "not "); |
| 943 | |
| 944 | inf->running = thread_running && task_running; |
| 945 | |
| 946 | /* Once any thread has executed some code, we can't depend on the |
| 947 | threads list any more. */ |
| 948 | if (inf->running) |
| 949 | inf->threads_up_to_date = 0; |
| 950 | |
| 951 | return inf->running; |
| 952 | } |
| 953 | |
| 954 | return 0; |
| 955 | } |
| 956 | |
| 957 | \f |
| 958 | /* Converts a GDB pid to a struct proc. */ |
| 959 | struct proc * |
| 960 | inf_tid_to_thread (struct inf *inf, int tid) |
| 961 | { |
| 962 | struct proc *thread = inf->threads; |
| 963 | |
| 964 | while (thread) |
| 965 | if (thread->tid == tid) |
| 966 | return thread; |
| 967 | else |
| 968 | thread = thread->next; |
| 969 | return 0; |
| 970 | } |
| 971 | |
| 972 | /* Converts a thread port to a struct proc. */ |
| 973 | struct proc * |
| 974 | inf_port_to_thread (struct inf *inf, mach_port_t port) |
| 975 | { |
| 976 | struct proc *thread = inf->threads; |
| 977 | while (thread) |
| 978 | if (thread->port == port) |
| 979 | return thread; |
| 980 | else |
| 981 | thread = thread->next; |
| 982 | return 0; |
| 983 | } |
| 984 | |
| 985 | \f |
| 986 | /* Make INF's list of threads be consistent with reality of TASK. */ |
| 987 | void |
| 988 | inf_validate_procs (struct inf *inf) |
| 989 | { |
| 990 | thread_array_t threads; |
| 991 | mach_msg_type_number_t num_threads, i; |
| 992 | struct proc *task = inf->task; |
| 993 | |
| 994 | /* If no threads are currently running, this function will guarantee that |
| 995 | things are up to date. The exception is if there are zero threads -- |
| 996 | then it is almost certainly in an odd state, and probably some outside |
| 997 | agent will create threads. */ |
| 998 | inf->threads_up_to_date = inf->threads ? !inf->running : 0; |
| 999 | |
| 1000 | if (task) |
| 1001 | { |
| 1002 | error_t err = task_threads (task->port, &threads, &num_threads); |
| 1003 | inf_debug (inf, "fetching threads"); |
| 1004 | if (err) |
| 1005 | /* TASK must be dead. */ |
| 1006 | { |
| 1007 | task->dead = 1; |
| 1008 | task = 0; |
| 1009 | } |
| 1010 | } |
| 1011 | |
| 1012 | if (!task) |
| 1013 | { |
| 1014 | num_threads = 0; |
| 1015 | inf_debug (inf, "no task"); |
| 1016 | } |
| 1017 | |
| 1018 | { |
| 1019 | /* Make things normally linear. */ |
| 1020 | mach_msg_type_number_t search_start = 0; |
| 1021 | /* Which thread in PROCS corresponds to each task thread, & the task. */ |
| 1022 | struct proc *matched[num_threads + 1]; |
| 1023 | /* The last thread in INF->threads, so we can add to the end. */ |
| 1024 | struct proc *last = 0; |
| 1025 | /* The current thread we're considering. */ |
| 1026 | struct proc *thread = inf->threads; |
| 1027 | |
| 1028 | memset (matched, 0, sizeof (matched)); |
| 1029 | |
| 1030 | while (thread) |
| 1031 | { |
| 1032 | mach_msg_type_number_t left; |
| 1033 | |
| 1034 | for (i = search_start, left = num_threads; left; i++, left--) |
| 1035 | { |
| 1036 | if (i >= num_threads) |
| 1037 | i -= num_threads; /* I wrapped around. */ |
| 1038 | if (thread->port == threads[i]) |
| 1039 | /* We already know about this thread. */ |
| 1040 | { |
| 1041 | matched[i] = thread; |
| 1042 | last = thread; |
| 1043 | thread = thread->next; |
| 1044 | search_start++; |
| 1045 | break; |
| 1046 | } |
| 1047 | } |
| 1048 | |
| 1049 | if (!left) |
| 1050 | { |
| 1051 | proc_debug (thread, "died!"); |
| 1052 | thread->port = MACH_PORT_NULL; |
| 1053 | thread = _proc_free (thread); /* THREAD is dead. */ |
| 1054 | if (last) |
| 1055 | last->next = thread; |
| 1056 | else |
| 1057 | inf->threads = thread; |
| 1058 | } |
| 1059 | } |
| 1060 | |
| 1061 | for (i = 0; i < num_threads; i++) |
| 1062 | { |
| 1063 | if (matched[i]) |
| 1064 | /* Throw away the duplicate send right. */ |
| 1065 | mach_port_deallocate (mach_task_self (), threads[i]); |
| 1066 | else |
| 1067 | /* THREADS[I] is a thread we don't know about yet! */ |
| 1068 | { |
| 1069 | ptid_t ptid; |
| 1070 | |
| 1071 | thread = make_proc (inf, threads[i], next_thread_id++); |
| 1072 | if (last) |
| 1073 | last->next = thread; |
| 1074 | else |
| 1075 | inf->threads = thread; |
| 1076 | last = thread; |
| 1077 | proc_debug (thread, "new thread: %d", threads[i]); |
| 1078 | |
| 1079 | ptid = ptid_build (inf->pid, 0, thread->tid); |
| 1080 | |
| 1081 | /* Tell GDB's generic thread code. */ |
| 1082 | |
| 1083 | if (ptid_equal (inferior_ptid, pid_to_ptid (inf->pid))) |
| 1084 | /* This is the first time we're hearing about thread |
| 1085 | ids, after a fork-child. */ |
| 1086 | thread_change_ptid (inferior_ptid, ptid); |
| 1087 | else if (inf->pending_execs != 0) |
| 1088 | /* This is a shell thread. */ |
| 1089 | add_thread_silent (ptid); |
| 1090 | else |
| 1091 | add_thread (ptid); |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | vm_deallocate (mach_task_self (), |
| 1096 | (vm_address_t) threads, (num_threads * sizeof (thread_t))); |
| 1097 | } |
| 1098 | } |
| 1099 | |
| 1100 | \f |
| 1101 | /* Makes sure that INF's thread list is synced with the actual process. */ |
| 1102 | int |
| 1103 | inf_update_procs (struct inf *inf) |
| 1104 | { |
| 1105 | if (!inf->task) |
| 1106 | return 0; |
| 1107 | if (!inf->threads_up_to_date) |
| 1108 | inf_validate_procs (inf); |
| 1109 | return !!inf->task; |
| 1110 | } |
| 1111 | |
| 1112 | /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0, |
| 1113 | and others are set to their run_sc if RUN_OTHERS is true, and otherwise |
| 1114 | their pause_sc. */ |
| 1115 | void |
| 1116 | inf_set_threads_resume_sc (struct inf *inf, |
| 1117 | struct proc *run_thread, int run_others) |
| 1118 | { |
| 1119 | struct proc *thread; |
| 1120 | inf_update_procs (inf); |
| 1121 | for (thread = inf->threads; thread; thread = thread->next) |
| 1122 | if (thread == run_thread) |
| 1123 | thread->resume_sc = 0; |
| 1124 | else if (run_others) |
| 1125 | thread->resume_sc = thread->run_sc; |
| 1126 | else |
| 1127 | thread->resume_sc = thread->pause_sc; |
| 1128 | } |
| 1129 | |
| 1130 | \f |
| 1131 | /* Cause INF to continue execution immediately; individual threads may still |
| 1132 | be suspended (but their suspend counts will be updated). */ |
| 1133 | void |
| 1134 | inf_resume (struct inf *inf) |
| 1135 | { |
| 1136 | struct proc *thread; |
| 1137 | |
| 1138 | inf_update_procs (inf); |
| 1139 | |
| 1140 | for (thread = inf->threads; thread; thread = thread->next) |
| 1141 | thread->sc = thread->resume_sc; |
| 1142 | |
| 1143 | if (inf->task) |
| 1144 | { |
| 1145 | if (!inf->pending_execs) |
| 1146 | /* Try to make sure our task count is correct -- in the case where |
| 1147 | we're waiting for an exec though, things are too volatile, so just |
| 1148 | assume things will be reasonable (which they usually will be). */ |
| 1149 | inf_validate_task_sc (inf); |
| 1150 | inf->task->sc = 0; |
| 1151 | } |
| 1152 | |
| 1153 | inf_update_suspends (inf); |
| 1154 | } |
| 1155 | |
| 1156 | /* Cause INF to stop execution immediately; individual threads may still |
| 1157 | be running. */ |
| 1158 | void |
| 1159 | inf_suspend (struct inf *inf) |
| 1160 | { |
| 1161 | struct proc *thread; |
| 1162 | |
| 1163 | inf_update_procs (inf); |
| 1164 | |
| 1165 | for (thread = inf->threads; thread; thread = thread->next) |
| 1166 | thread->sc = thread->pause_sc; |
| 1167 | |
| 1168 | if (inf->task) |
| 1169 | inf->task->sc = inf->pause_sc; |
| 1170 | |
| 1171 | inf_update_suspends (inf); |
| 1172 | } |
| 1173 | |
| 1174 | \f |
| 1175 | /* INF has one thread PROC that is in single-stepping mode. This |
| 1176 | function changes it to be PROC, changing any old step_thread to be |
| 1177 | a normal one. A PROC of 0 clears any existing value. */ |
| 1178 | void |
| 1179 | inf_set_step_thread (struct inf *inf, struct proc *thread) |
| 1180 | { |
| 1181 | gdb_assert (!thread || proc_is_thread (thread)); |
| 1182 | |
| 1183 | if (thread) |
| 1184 | inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid); |
| 1185 | else |
| 1186 | inf_debug (inf, "clearing step thread"); |
| 1187 | |
| 1188 | if (inf->step_thread != thread) |
| 1189 | { |
| 1190 | if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL) |
| 1191 | if (!proc_trace (inf->step_thread, 0)) |
| 1192 | return; |
| 1193 | if (thread && proc_trace (thread, 1)) |
| 1194 | inf->step_thread = thread; |
| 1195 | else |
| 1196 | inf->step_thread = 0; |
| 1197 | } |
| 1198 | } |
| 1199 | |
| 1200 | \f |
| 1201 | /* Set up the thread resume_sc's so that only the signal thread is running |
| 1202 | (plus whatever other thread are set to always run). Returns true if we |
| 1203 | did so, or false if we can't find a signal thread. */ |
| 1204 | int |
| 1205 | inf_set_threads_resume_sc_for_signal_thread (struct inf *inf) |
| 1206 | { |
| 1207 | if (inf->signal_thread) |
| 1208 | { |
| 1209 | inf_set_threads_resume_sc (inf, inf->signal_thread, 0); |
| 1210 | return 1; |
| 1211 | } |
| 1212 | else |
| 1213 | return 0; |
| 1214 | } |
| 1215 | |
| 1216 | static void |
| 1217 | inf_update_signal_thread (struct inf *inf) |
| 1218 | { |
| 1219 | /* XXX for now we assume that if there's a msgport, the 2nd thread is |
| 1220 | the signal thread. */ |
| 1221 | inf->signal_thread = inf->threads ? inf->threads->next : 0; |
| 1222 | } |
| 1223 | |
| 1224 | \f |
| 1225 | /* Detachs from INF's inferior task, letting it run once again... */ |
| 1226 | void |
| 1227 | inf_detach (struct inf *inf) |
| 1228 | { |
| 1229 | struct proc *task = inf->task; |
| 1230 | |
| 1231 | inf_debug (inf, "detaching..."); |
| 1232 | |
| 1233 | inf_clear_wait (inf); |
| 1234 | inf_set_step_thread (inf, 0); |
| 1235 | |
| 1236 | if (task) |
| 1237 | { |
| 1238 | struct proc *thread; |
| 1239 | |
| 1240 | inf_validate_procinfo (inf); |
| 1241 | |
| 1242 | inf_set_traced (inf, 0); |
| 1243 | if (inf->stopped) |
| 1244 | { |
| 1245 | if (inf->nomsg) |
| 1246 | inf_continue (inf); |
| 1247 | else |
| 1248 | inf_signal (inf, TARGET_SIGNAL_0); |
| 1249 | } |
| 1250 | |
| 1251 | proc_restore_exc_port (task); |
| 1252 | task->sc = inf->detach_sc; |
| 1253 | |
| 1254 | for (thread = inf->threads; thread; thread = thread->next) |
| 1255 | { |
| 1256 | proc_restore_exc_port (thread); |
| 1257 | thread->sc = thread->detach_sc; |
| 1258 | } |
| 1259 | |
| 1260 | inf_update_suspends (inf); |
| 1261 | } |
| 1262 | |
| 1263 | inf_cleanup (inf); |
| 1264 | } |
| 1265 | |
| 1266 | /* Attaches INF to the process with process id PID, returning it in a |
| 1267 | suspended state suitable for debugging. */ |
| 1268 | void |
| 1269 | inf_attach (struct inf *inf, int pid) |
| 1270 | { |
| 1271 | inf_debug (inf, "attaching: %d", pid); |
| 1272 | |
| 1273 | if (inf->pid) |
| 1274 | inf_detach (inf); |
| 1275 | |
| 1276 | inf_startup (inf, pid); |
| 1277 | } |
| 1278 | |
| 1279 | \f |
| 1280 | /* Makes sure that we've got our exception ports entrenched in the process. */ |
| 1281 | void |
| 1282 | inf_steal_exc_ports (struct inf *inf) |
| 1283 | { |
| 1284 | struct proc *thread; |
| 1285 | |
| 1286 | inf_debug (inf, "stealing exception ports"); |
| 1287 | |
| 1288 | inf_set_step_thread (inf, 0); /* The step thread is special. */ |
| 1289 | |
| 1290 | proc_steal_exc_port (inf->task, inf->event_port); |
| 1291 | for (thread = inf->threads; thread; thread = thread->next) |
| 1292 | proc_steal_exc_port (thread, MACH_PORT_NULL); |
| 1293 | } |
| 1294 | |
| 1295 | /* Makes sure the process has its own exception ports. */ |
| 1296 | void |
| 1297 | inf_restore_exc_ports (struct inf *inf) |
| 1298 | { |
| 1299 | struct proc *thread; |
| 1300 | |
| 1301 | inf_debug (inf, "restoring exception ports"); |
| 1302 | |
| 1303 | inf_set_step_thread (inf, 0); /* The step thread is special. */ |
| 1304 | |
| 1305 | proc_restore_exc_port (inf->task); |
| 1306 | for (thread = inf->threads; thread; thread = thread->next) |
| 1307 | proc_restore_exc_port (thread); |
| 1308 | } |
| 1309 | |
| 1310 | \f |
| 1311 | /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even |
| 1312 | signal 0, will continue it. INF is assumed to be in a paused state, and |
| 1313 | the resume_sc's of INF's threads may be affected. */ |
| 1314 | void |
| 1315 | inf_signal (struct inf *inf, enum target_signal sig) |
| 1316 | { |
| 1317 | error_t err = 0; |
| 1318 | int host_sig = target_signal_to_host (sig); |
| 1319 | |
| 1320 | #define NAME target_signal_to_name (sig) |
| 1321 | |
| 1322 | if (host_sig >= _NSIG) |
| 1323 | /* A mach exception. Exceptions are encoded in the signal space by |
| 1324 | putting them after _NSIG; this assumes they're positive (and not |
| 1325 | extremely large)! */ |
| 1326 | { |
| 1327 | struct inf_wait *w = &inf->wait; |
| 1328 | if (w->status.kind == TARGET_WAITKIND_STOPPED |
| 1329 | && w->status.value.sig == sig |
| 1330 | && w->thread && !w->thread->aborted) |
| 1331 | /* We're passing through the last exception we received. This is |
| 1332 | kind of bogus, because exceptions are per-thread whereas gdb |
| 1333 | treats signals as per-process. We just forward the exception to |
| 1334 | the correct handler, even it's not for the same thread as TID -- |
| 1335 | i.e., we pretend it's global. */ |
| 1336 | { |
| 1337 | struct exc_state *e = &w->exc; |
| 1338 | inf_debug (inf, "passing through exception:" |
| 1339 | " task = %d, thread = %d, exc = %d" |
| 1340 | ", code = %d, subcode = %d", |
| 1341 | w->thread->port, inf->task->port, |
| 1342 | e->exception, e->code, e->subcode); |
| 1343 | err = |
| 1344 | exception_raise_request (e->handler, |
| 1345 | e->reply, MACH_MSG_TYPE_MOVE_SEND_ONCE, |
| 1346 | w->thread->port, inf->task->port, |
| 1347 | e->exception, e->code, e->subcode); |
| 1348 | } |
| 1349 | else |
| 1350 | error (_("Can't forward spontaneous exception (%s)."), NAME); |
| 1351 | } |
| 1352 | else |
| 1353 | /* A Unix signal. */ |
| 1354 | if (inf->stopped) |
| 1355 | /* The process is stopped and expecting a signal. Just send off a |
| 1356 | request and let it get handled when we resume everything. */ |
| 1357 | { |
| 1358 | inf_debug (inf, "sending %s to stopped process", NAME); |
| 1359 | err = |
| 1360 | INF_MSGPORT_RPC (inf, |
| 1361 | msg_sig_post_untraced_request (msgport, |
| 1362 | inf->event_port, |
| 1363 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
| 1364 | host_sig, 0, |
| 1365 | refport)); |
| 1366 | if (!err) |
| 1367 | /* Posting an untraced signal automatically continues it. |
| 1368 | We clear this here rather than when we get the reply |
| 1369 | because we'd rather assume it's not stopped when it |
| 1370 | actually is, than the reverse. */ |
| 1371 | inf->stopped = 0; |
| 1372 | } |
| 1373 | else |
| 1374 | /* It's not expecting it. We have to let just the signal thread |
| 1375 | run, and wait for it to get into a reasonable state before we |
| 1376 | can continue the rest of the process. When we finally resume the |
| 1377 | process the signal we request will be the very first thing that |
| 1378 | happens. */ |
| 1379 | { |
| 1380 | inf_debug (inf, "sending %s to unstopped process" |
| 1381 | " (so resuming signal thread)", NAME); |
| 1382 | err = |
| 1383 | INF_RESUME_MSGPORT_RPC (inf, |
| 1384 | msg_sig_post_untraced (msgport, host_sig, |
| 1385 | 0, refport)); |
| 1386 | } |
| 1387 | |
| 1388 | if (err == EIEIO) |
| 1389 | /* Can't do too much... */ |
| 1390 | warning (_("Can't deliver signal %s: No signal thread."), NAME); |
| 1391 | else if (err) |
| 1392 | warning (_("Delivering signal %s: %s"), NAME, safe_strerror (err)); |
| 1393 | |
| 1394 | #undef NAME |
| 1395 | } |
| 1396 | |
| 1397 | \f |
| 1398 | /* Continue INF without delivering a signal. This is meant to be used |
| 1399 | when INF does not have a message port. */ |
| 1400 | void |
| 1401 | inf_continue (struct inf *inf) |
| 1402 | { |
| 1403 | process_t proc; |
| 1404 | error_t err = proc_pid2proc (proc_server, inf->pid, &proc); |
| 1405 | |
| 1406 | if (!err) |
| 1407 | { |
| 1408 | inf_debug (inf, "continuing process"); |
| 1409 | |
| 1410 | err = proc_mark_cont (proc); |
| 1411 | if (!err) |
| 1412 | { |
| 1413 | struct proc *thread; |
| 1414 | |
| 1415 | for (thread = inf->threads; thread; thread = thread->next) |
| 1416 | thread_resume (thread->port); |
| 1417 | |
| 1418 | inf->stopped = 0; |
| 1419 | } |
| 1420 | } |
| 1421 | |
| 1422 | if (err) |
| 1423 | warning (_("Can't continue process: %s"), safe_strerror (err)); |
| 1424 | } |
| 1425 | |
| 1426 | \f |
| 1427 | /* The inferior used for all gdb target ops. */ |
| 1428 | struct inf *gnu_current_inf = 0; |
| 1429 | |
| 1430 | /* The inferior being waited for by gnu_wait. Since GDB is decidely not |
| 1431 | multi-threaded, we don't bother to lock this. */ |
| 1432 | struct inf *waiting_inf; |
| 1433 | |
| 1434 | /* Wait for something to happen in the inferior, returning what in STATUS. */ |
| 1435 | static ptid_t |
| 1436 | gnu_wait (struct target_ops *ops, |
| 1437 | ptid_t ptid, struct target_waitstatus *status) |
| 1438 | { |
| 1439 | struct msg |
| 1440 | { |
| 1441 | mach_msg_header_t hdr; |
| 1442 | mach_msg_type_t type; |
| 1443 | int data[8000]; |
| 1444 | } msg; |
| 1445 | error_t err; |
| 1446 | struct proc *thread; |
| 1447 | struct inf *inf = gnu_current_inf; |
| 1448 | |
| 1449 | extern int exc_server (mach_msg_header_t *, mach_msg_header_t *); |
| 1450 | extern int msg_reply_server (mach_msg_header_t *, mach_msg_header_t *); |
| 1451 | extern int notify_server (mach_msg_header_t *, mach_msg_header_t *); |
| 1452 | extern int process_reply_server (mach_msg_header_t *, mach_msg_header_t *); |
| 1453 | |
| 1454 | gdb_assert (inf->task); |
| 1455 | |
| 1456 | if (!inf->threads && !inf->pending_execs) |
| 1457 | /* No threads! Assume that maybe some outside agency is frobbing our |
| 1458 | task, and really look for new threads. If we can't find any, just tell |
| 1459 | the user to try again later. */ |
| 1460 | { |
| 1461 | inf_validate_procs (inf); |
| 1462 | if (!inf->threads && !inf->task->dead) |
| 1463 | error (_("There are no threads; try again later.")); |
| 1464 | } |
| 1465 | |
| 1466 | waiting_inf = inf; |
| 1467 | |
| 1468 | inf_debug (inf, "waiting for: %s", target_pid_to_str (ptid)); |
| 1469 | |
| 1470 | rewait: |
| 1471 | if (proc_wait_pid != inf->pid && !inf->no_wait) |
| 1472 | /* Always get information on events from the proc server. */ |
| 1473 | { |
| 1474 | inf_debug (inf, "requesting wait on pid %d", inf->pid); |
| 1475 | |
| 1476 | if (proc_wait_pid) |
| 1477 | /* The proc server is single-threaded, and only allows a single |
| 1478 | outstanding wait request, so we have to cancel the previous one. */ |
| 1479 | { |
| 1480 | inf_debug (inf, "cancelling previous wait on pid %d", proc_wait_pid); |
| 1481 | interrupt_operation (proc_server, 0); |
| 1482 | } |
| 1483 | |
| 1484 | err = |
| 1485 | proc_wait_request (proc_server, inf->event_port, inf->pid, WUNTRACED); |
| 1486 | if (err) |
| 1487 | warning (_("wait request failed: %s"), safe_strerror (err)); |
| 1488 | else |
| 1489 | { |
| 1490 | inf_debug (inf, "waits pending: %d", proc_waits_pending); |
| 1491 | proc_wait_pid = inf->pid; |
| 1492 | /* Even if proc_waits_pending was > 0 before, we still won't |
| 1493 | get any other replies, because it was either from a |
| 1494 | different INF, or a different process attached to INF -- |
| 1495 | and the event port, which is the wait reply port, changes |
| 1496 | when you switch processes. */ |
| 1497 | proc_waits_pending = 1; |
| 1498 | } |
| 1499 | } |
| 1500 | |
| 1501 | inf_clear_wait (inf); |
| 1502 | |
| 1503 | /* What can happen? (1) Dead name notification; (2) Exceptions arrive; |
| 1504 | (3) wait reply from the proc server. */ |
| 1505 | |
| 1506 | inf_debug (inf, "waiting for an event..."); |
| 1507 | err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, |
| 1508 | 0, sizeof (struct msg), inf->event_port, |
| 1509 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); |
| 1510 | |
| 1511 | /* Re-suspend the task. */ |
| 1512 | inf_suspend (inf); |
| 1513 | |
| 1514 | if (!inf->task && inf->pending_execs) |
| 1515 | /* When doing an exec, it's possible that the old task wasn't reused |
| 1516 | (e.g., setuid execs). So if the task seems to have disappeared, |
| 1517 | attempt to refetch it, as the pid should still be the same. */ |
| 1518 | inf_set_pid (inf, inf->pid); |
| 1519 | |
| 1520 | if (err == EMACH_RCV_INTERRUPTED) |
| 1521 | inf_debug (inf, "interrupted"); |
| 1522 | else if (err) |
| 1523 | error (_("Couldn't wait for an event: %s"), safe_strerror (err)); |
| 1524 | else |
| 1525 | { |
| 1526 | struct |
| 1527 | { |
| 1528 | mach_msg_header_t hdr; |
| 1529 | mach_msg_type_t err_type; |
| 1530 | kern_return_t err; |
| 1531 | char noise[200]; |
| 1532 | } |
| 1533 | reply; |
| 1534 | |
| 1535 | inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id); |
| 1536 | |
| 1537 | /* Handle what we got. */ |
| 1538 | if (!notify_server (&msg.hdr, &reply.hdr) |
| 1539 | && !exc_server (&msg.hdr, &reply.hdr) |
| 1540 | && !process_reply_server (&msg.hdr, &reply.hdr) |
| 1541 | && !msg_reply_server (&msg.hdr, &reply.hdr)) |
| 1542 | /* Whatever it is, it's something strange. */ |
| 1543 | error (_("Got a strange event, msg id = %d."), msg.hdr.msgh_id); |
| 1544 | |
| 1545 | if (reply.err) |
| 1546 | error (_("Handling event, msgid = %d: %s"), |
| 1547 | msg.hdr.msgh_id, safe_strerror (reply.err)); |
| 1548 | } |
| 1549 | |
| 1550 | if (inf->pending_execs) |
| 1551 | /* We're waiting for the inferior to finish execing. */ |
| 1552 | { |
| 1553 | struct inf_wait *w = &inf->wait; |
| 1554 | enum target_waitkind kind = w->status.kind; |
| 1555 | |
| 1556 | if (kind == TARGET_WAITKIND_SPURIOUS) |
| 1557 | /* Since gdb is actually counting the number of times the inferior |
| 1558 | stops, expecting one stop per exec, we only return major events |
| 1559 | while execing. */ |
| 1560 | { |
| 1561 | w->suppress = 1; |
| 1562 | inf_debug (inf, "pending_execs = %d, ignoring minor event", |
| 1563 | inf->pending_execs); |
| 1564 | } |
| 1565 | else if (kind == TARGET_WAITKIND_STOPPED |
| 1566 | && w->status.value.sig == TARGET_SIGNAL_TRAP) |
| 1567 | /* Ah hah! A SIGTRAP from the inferior while starting up probably |
| 1568 | means we've succesfully completed an exec! */ |
| 1569 | { |
| 1570 | if (--inf->pending_execs == 0) |
| 1571 | /* We're done! */ |
| 1572 | { |
| 1573 | #if 0 /* do we need this? */ |
| 1574 | prune_threads (1); /* Get rid of the old shell threads */ |
| 1575 | renumber_threads (0); /* Give our threads reasonable names. */ |
| 1576 | #endif |
| 1577 | } |
| 1578 | inf_debug (inf, "pending exec completed, pending_execs => %d", |
| 1579 | inf->pending_execs); |
| 1580 | } |
| 1581 | else if (kind == TARGET_WAITKIND_STOPPED) |
| 1582 | /* It's possible that this signal is because of a crashed process |
| 1583 | being handled by the hurd crash server; in this case, the process |
| 1584 | will have an extra task suspend, which we need to know about. |
| 1585 | Since the code in inf_resume that normally checks for this is |
| 1586 | disabled while INF->pending_execs, we do the check here instead. */ |
| 1587 | inf_validate_task_sc (inf); |
| 1588 | } |
| 1589 | |
| 1590 | if (inf->wait.suppress) |
| 1591 | /* Some totally spurious event happened that we don't consider |
| 1592 | worth returning to gdb. Just keep waiting. */ |
| 1593 | { |
| 1594 | inf_debug (inf, "suppressing return, rewaiting..."); |
| 1595 | inf_resume (inf); |
| 1596 | goto rewait; |
| 1597 | } |
| 1598 | |
| 1599 | /* Pass back out our results. */ |
| 1600 | memcpy (status, &inf->wait.status, sizeof (*status)); |
| 1601 | |
| 1602 | thread = inf->wait.thread; |
| 1603 | if (thread) |
| 1604 | ptid = ptid_build (inf->pid, 0, thread->tid); |
| 1605 | else if (ptid_equal (ptid, minus_one_ptid)) |
| 1606 | thread = inf_tid_to_thread (inf, -1); |
| 1607 | else |
| 1608 | thread = inf_tid_to_thread (inf, ptid_get_tid (ptid)); |
| 1609 | |
| 1610 | if (!thread || thread->port == MACH_PORT_NULL) |
| 1611 | { |
| 1612 | /* TID is dead; try and find a new thread. */ |
| 1613 | if (inf_update_procs (inf) && inf->threads) |
| 1614 | ptid = ptid_build (inf->pid, 0, inf->threads->tid); /* The first available thread. */ |
| 1615 | else |
| 1616 | ptid = inferior_ptid; /* let wait_for_inferior handle exit case */ |
| 1617 | } |
| 1618 | |
| 1619 | if (thread |
| 1620 | && !ptid_equal (ptid, minus_one_ptid) |
| 1621 | && status->kind != TARGET_WAITKIND_SPURIOUS |
| 1622 | && inf->pause_sc == 0 && thread->pause_sc == 0) |
| 1623 | /* If something actually happened to THREAD, make sure we |
| 1624 | suspend it. */ |
| 1625 | { |
| 1626 | thread->sc = 1; |
| 1627 | inf_update_suspends (inf); |
| 1628 | } |
| 1629 | |
| 1630 | inf_debug (inf, "returning ptid = %s, status = %s (%d)", |
| 1631 | target_pid_to_str (ptid), |
| 1632 | status->kind == TARGET_WAITKIND_EXITED ? "EXITED" |
| 1633 | : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED" |
| 1634 | : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED" |
| 1635 | : status->kind == TARGET_WAITKIND_LOADED ? "LOADED" |
| 1636 | : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS" |
| 1637 | : "?", |
| 1638 | status->value.integer); |
| 1639 | |
| 1640 | return ptid; |
| 1641 | } |
| 1642 | |
| 1643 | \f |
| 1644 | /* The rpc handler called by exc_server. */ |
| 1645 | error_t |
| 1646 | S_exception_raise_request (mach_port_t port, mach_port_t reply_port, |
| 1647 | thread_t thread_port, task_t task_port, |
| 1648 | int exception, int code, int subcode) |
| 1649 | { |
| 1650 | struct inf *inf = waiting_inf; |
| 1651 | struct proc *thread = inf_port_to_thread (inf, thread_port); |
| 1652 | |
| 1653 | inf_debug (waiting_inf, |
| 1654 | "thread = %d, task = %d, exc = %d, code = %d, subcode = %d", |
| 1655 | thread_port, task_port, exception, code, subcode); |
| 1656 | |
| 1657 | if (!thread) |
| 1658 | /* We don't know about thread? */ |
| 1659 | { |
| 1660 | inf_update_procs (inf); |
| 1661 | thread = inf_port_to_thread (inf, thread_port); |
| 1662 | if (!thread) |
| 1663 | /* Give up, the generating thread is gone. */ |
| 1664 | return 0; |
| 1665 | } |
| 1666 | |
| 1667 | mach_port_deallocate (mach_task_self (), thread_port); |
| 1668 | mach_port_deallocate (mach_task_self (), task_port); |
| 1669 | |
| 1670 | if (!thread->aborted) |
| 1671 | /* THREAD hasn't been aborted since this exception happened (abortion |
| 1672 | clears any exception state), so it must be real. */ |
| 1673 | { |
| 1674 | /* Store away the details; this will destroy any previous info. */ |
| 1675 | inf->wait.thread = thread; |
| 1676 | |
| 1677 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; |
| 1678 | |
| 1679 | if (exception == EXC_BREAKPOINT) |
| 1680 | /* GDB likes to get SIGTRAP for breakpoints. */ |
| 1681 | { |
| 1682 | inf->wait.status.value.sig = TARGET_SIGNAL_TRAP; |
| 1683 | mach_port_deallocate (mach_task_self (), reply_port); |
| 1684 | } |
| 1685 | else |
| 1686 | /* Record the exception so that we can forward it later. */ |
| 1687 | { |
| 1688 | if (thread->exc_port == port) |
| 1689 | { |
| 1690 | inf_debug (waiting_inf, "Handler is thread exception port <%d>", |
| 1691 | thread->saved_exc_port); |
| 1692 | inf->wait.exc.handler = thread->saved_exc_port; |
| 1693 | } |
| 1694 | else |
| 1695 | { |
| 1696 | inf_debug (waiting_inf, "Handler is task exception port <%d>", |
| 1697 | inf->task->saved_exc_port); |
| 1698 | inf->wait.exc.handler = inf->task->saved_exc_port; |
| 1699 | gdb_assert (inf->task->exc_port == port); |
| 1700 | } |
| 1701 | if (inf->wait.exc.handler != MACH_PORT_NULL) |
| 1702 | /* Add a reference to the exception handler. */ |
| 1703 | mach_port_mod_refs (mach_task_self (), |
| 1704 | inf->wait.exc.handler, MACH_PORT_RIGHT_SEND, |
| 1705 | 1); |
| 1706 | |
| 1707 | inf->wait.exc.exception = exception; |
| 1708 | inf->wait.exc.code = code; |
| 1709 | inf->wait.exc.subcode = subcode; |
| 1710 | inf->wait.exc.reply = reply_port; |
| 1711 | |
| 1712 | /* Exceptions are encoded in the signal space by putting them after |
| 1713 | _NSIG; this assumes they're positive (and not extremely large)! */ |
| 1714 | inf->wait.status.value.sig = |
| 1715 | target_signal_from_host (_NSIG + exception); |
| 1716 | } |
| 1717 | } |
| 1718 | else |
| 1719 | /* A supppressed exception, which ignore. */ |
| 1720 | { |
| 1721 | inf->wait.suppress = 1; |
| 1722 | mach_port_deallocate (mach_task_self (), reply_port); |
| 1723 | } |
| 1724 | |
| 1725 | return 0; |
| 1726 | } |
| 1727 | |
| 1728 | \f |
| 1729 | /* Fill in INF's wait field after a task has died without giving us more |
| 1730 | detailed information. */ |
| 1731 | void |
| 1732 | inf_task_died_status (struct inf *inf) |
| 1733 | { |
| 1734 | warning (_("Pid %d died with unknown exit status, using SIGKILL."), inf->pid); |
| 1735 | inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED; |
| 1736 | inf->wait.status.value.sig = TARGET_SIGNAL_KILL; |
| 1737 | } |
| 1738 | |
| 1739 | /* Notify server routines. The only real one is dead name notification. */ |
| 1740 | error_t |
| 1741 | do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port) |
| 1742 | { |
| 1743 | struct inf *inf = waiting_inf; |
| 1744 | |
| 1745 | inf_debug (waiting_inf, "port = %d", dead_port); |
| 1746 | |
| 1747 | if (inf->task && inf->task->port == dead_port) |
| 1748 | { |
| 1749 | proc_debug (inf->task, "is dead"); |
| 1750 | inf->task->port = MACH_PORT_NULL; |
| 1751 | if (proc_wait_pid == inf->pid) |
| 1752 | /* We have a wait outstanding on the process, which will return more |
| 1753 | detailed information, so delay until we get that. */ |
| 1754 | inf->wait.suppress = 1; |
| 1755 | else |
| 1756 | /* We never waited for the process (maybe it wasn't a child), so just |
| 1757 | pretend it got a SIGKILL. */ |
| 1758 | inf_task_died_status (inf); |
| 1759 | } |
| 1760 | else |
| 1761 | { |
| 1762 | struct proc *thread = inf_port_to_thread (inf, dead_port); |
| 1763 | if (thread) |
| 1764 | { |
| 1765 | proc_debug (thread, "is dead"); |
| 1766 | thread->port = MACH_PORT_NULL; |
| 1767 | } |
| 1768 | |
| 1769 | if (inf->task->dead) |
| 1770 | /* Since the task is dead, its threads are dying with it. */ |
| 1771 | inf->wait.suppress = 1; |
| 1772 | } |
| 1773 | |
| 1774 | mach_port_deallocate (mach_task_self (), dead_port); |
| 1775 | inf->threads_up_to_date = 0; /* Just in case */ |
| 1776 | |
| 1777 | return 0; |
| 1778 | } |
| 1779 | |
| 1780 | \f |
| 1781 | static error_t |
| 1782 | ill_rpc (char *fun) |
| 1783 | { |
| 1784 | warning (_("illegal rpc: %s"), fun); |
| 1785 | return 0; |
| 1786 | } |
| 1787 | |
| 1788 | error_t |
| 1789 | do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t count) |
| 1790 | { |
| 1791 | return ill_rpc ("do_mach_notify_no_senders"); |
| 1792 | } |
| 1793 | |
| 1794 | error_t |
| 1795 | do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name) |
| 1796 | { |
| 1797 | return ill_rpc ("do_mach_notify_port_deleted"); |
| 1798 | } |
| 1799 | |
| 1800 | error_t |
| 1801 | do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name) |
| 1802 | { |
| 1803 | return ill_rpc ("do_mach_notify_msg_accepted"); |
| 1804 | } |
| 1805 | |
| 1806 | error_t |
| 1807 | do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name) |
| 1808 | { |
| 1809 | return ill_rpc ("do_mach_notify_port_destroyed"); |
| 1810 | } |
| 1811 | |
| 1812 | error_t |
| 1813 | do_mach_notify_send_once (mach_port_t notify) |
| 1814 | { |
| 1815 | return ill_rpc ("do_mach_notify_send_once"); |
| 1816 | } |
| 1817 | |
| 1818 | \f |
| 1819 | /* Process_reply server routines. We only use process_wait_reply. */ |
| 1820 | |
| 1821 | error_t |
| 1822 | S_proc_wait_reply (mach_port_t reply, error_t err, |
| 1823 | int status, int sigcode, rusage_t rusage, pid_t pid) |
| 1824 | { |
| 1825 | struct inf *inf = waiting_inf; |
| 1826 | |
| 1827 | inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d", |
| 1828 | err ? safe_strerror (err) : "0", pid, status, sigcode); |
| 1829 | |
| 1830 | if (err && proc_wait_pid && (!inf->task || !inf->task->port)) |
| 1831 | /* Ack. The task has died, but the task-died notification code didn't |
| 1832 | tell anyone because it thought a more detailed reply from the |
| 1833 | procserver was forthcoming. However, we now learn that won't |
| 1834 | happen... So we have to act like the task just died, and this time, |
| 1835 | tell the world. */ |
| 1836 | inf_task_died_status (inf); |
| 1837 | |
| 1838 | if (--proc_waits_pending == 0) |
| 1839 | /* PROC_WAIT_PID represents the most recent wait. We will always get |
| 1840 | replies in order because the proc server is single threaded. */ |
| 1841 | proc_wait_pid = 0; |
| 1842 | |
| 1843 | inf_debug (inf, "waits pending now: %d", proc_waits_pending); |
| 1844 | |
| 1845 | if (err) |
| 1846 | { |
| 1847 | if (err != EINTR) |
| 1848 | { |
| 1849 | warning (_("Can't wait for pid %d: %s"), inf->pid, safe_strerror (err)); |
| 1850 | inf->no_wait = 1; |
| 1851 | |
| 1852 | /* Since we can't see the inferior's signals, don't trap them. */ |
| 1853 | inf_set_traced (inf, 0); |
| 1854 | } |
| 1855 | } |
| 1856 | else if (pid == inf->pid) |
| 1857 | { |
| 1858 | store_waitstatus (&inf->wait.status, status); |
| 1859 | if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED) |
| 1860 | /* The process has sent us a signal, and stopped itself in a sane |
| 1861 | state pending our actions. */ |
| 1862 | { |
| 1863 | inf_debug (inf, "process has stopped itself"); |
| 1864 | inf->stopped = 1; |
| 1865 | } |
| 1866 | } |
| 1867 | else |
| 1868 | inf->wait.suppress = 1; /* Something odd happened. Ignore. */ |
| 1869 | |
| 1870 | return 0; |
| 1871 | } |
| 1872 | |
| 1873 | error_t |
| 1874 | S_proc_setmsgport_reply (mach_port_t reply, error_t err, |
| 1875 | mach_port_t old_msg_port) |
| 1876 | { |
| 1877 | return ill_rpc ("S_proc_setmsgport_reply"); |
| 1878 | } |
| 1879 | |
| 1880 | error_t |
| 1881 | S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port) |
| 1882 | { |
| 1883 | return ill_rpc ("S_proc_getmsgport_reply"); |
| 1884 | } |
| 1885 | |
| 1886 | \f |
| 1887 | /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */ |
| 1888 | |
| 1889 | error_t |
| 1890 | S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err) |
| 1891 | { |
| 1892 | struct inf *inf = waiting_inf; |
| 1893 | |
| 1894 | if (err == EBUSY) |
| 1895 | /* EBUSY is what we get when the crash server has grabbed control of the |
| 1896 | process and doesn't like what signal we tried to send it. Just act |
| 1897 | like the process stopped (using a signal of 0 should mean that the |
| 1898 | *next* time the user continues, it will pass signal 0, which the crash |
| 1899 | server should like). */ |
| 1900 | { |
| 1901 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; |
| 1902 | inf->wait.status.value.sig = TARGET_SIGNAL_0; |
| 1903 | } |
| 1904 | else if (err) |
| 1905 | warning (_("Signal delivery failed: %s"), safe_strerror (err)); |
| 1906 | |
| 1907 | if (err) |
| 1908 | /* We only get this reply when we've posted a signal to a process which we |
| 1909 | thought was stopped, and which we expected to continue after the signal. |
| 1910 | Given that the signal has failed for some reason, it's reasonable to |
| 1911 | assume it's still stopped. */ |
| 1912 | inf->stopped = 1; |
| 1913 | else |
| 1914 | inf->wait.suppress = 1; |
| 1915 | |
| 1916 | return 0; |
| 1917 | } |
| 1918 | |
| 1919 | error_t |
| 1920 | S_msg_sig_post_reply (mach_port_t reply, error_t err) |
| 1921 | { |
| 1922 | return ill_rpc ("S_msg_sig_post_reply"); |
| 1923 | } |
| 1924 | |
| 1925 | \f |
| 1926 | /* Returns the number of messages queued for the receive right PORT. */ |
| 1927 | static mach_port_msgcount_t |
| 1928 | port_msgs_queued (mach_port_t port) |
| 1929 | { |
| 1930 | struct mach_port_status status; |
| 1931 | error_t err = |
| 1932 | mach_port_get_receive_status (mach_task_self (), port, &status); |
| 1933 | |
| 1934 | if (err) |
| 1935 | return 0; |
| 1936 | else |
| 1937 | return status.mps_msgcount; |
| 1938 | } |
| 1939 | |
| 1940 | \f |
| 1941 | /* Resume execution of the inferior process. |
| 1942 | |
| 1943 | If STEP is nonzero, single-step it. |
| 1944 | If SIGNAL is nonzero, give it that signal. |
| 1945 | |
| 1946 | TID STEP: |
| 1947 | -1 true Single step the current thread allowing other threads to run. |
| 1948 | -1 false Continue the current thread allowing other threads to run. |
| 1949 | X true Single step the given thread, don't allow any others to run. |
| 1950 | X false Continue the given thread, do not allow any others to run. |
| 1951 | (Where X, of course, is anything except -1) |
| 1952 | |
| 1953 | Note that a resume may not `take' if there are pending exceptions/&c |
| 1954 | still unprocessed from the last resume we did (any given resume may result |
| 1955 | in multiple events returned by wait). |
| 1956 | */ |
| 1957 | static void |
| 1958 | gnu_resume (ptid_t ptid, int step, enum target_signal sig) |
| 1959 | { |
| 1960 | struct proc *step_thread = 0; |
| 1961 | int resume_all; |
| 1962 | struct inf *inf = gnu_current_inf; |
| 1963 | |
| 1964 | inf_debug (inf, "ptid = %s, step = %d, sig = %d", |
| 1965 | target_pid_to_str (ptid), step, sig); |
| 1966 | |
| 1967 | inf_validate_procinfo (inf); |
| 1968 | |
| 1969 | if (sig != TARGET_SIGNAL_0 || inf->stopped) |
| 1970 | { |
| 1971 | if (sig == TARGET_SIGNAL_0 && inf->nomsg) |
| 1972 | inf_continue (inf); |
| 1973 | else |
| 1974 | inf_signal (inf, sig); |
| 1975 | } |
| 1976 | else if (inf->wait.exc.reply != MACH_PORT_NULL) |
| 1977 | /* We received an exception to which we have chosen not to forward, so |
| 1978 | abort the faulting thread, which will perhaps retake it. */ |
| 1979 | { |
| 1980 | proc_abort (inf->wait.thread, 1); |
| 1981 | warning (_("Aborting %s with unforwarded exception %s."), |
| 1982 | proc_string (inf->wait.thread), |
| 1983 | target_signal_to_name (inf->wait.status.value.sig)); |
| 1984 | } |
| 1985 | |
| 1986 | if (port_msgs_queued (inf->event_port)) |
| 1987 | /* If there are still messages in our event queue, don't bother resuming |
| 1988 | the process, as we're just going to stop it right away anyway. */ |
| 1989 | return; |
| 1990 | |
| 1991 | inf_update_procs (inf); |
| 1992 | |
| 1993 | /* A specific PTID means `step only this process id'. */ |
| 1994 | resume_all = ptid_equal (ptid, minus_one_ptid); |
| 1995 | |
| 1996 | if (resume_all) |
| 1997 | /* Allow all threads to run, except perhaps single-stepping one. */ |
| 1998 | { |
| 1999 | inf_debug (inf, "running all threads; tid = %d", PIDGET (inferior_ptid)); |
| 2000 | ptid = inferior_ptid; /* What to step. */ |
| 2001 | inf_set_threads_resume_sc (inf, 0, 1); |
| 2002 | } |
| 2003 | else |
| 2004 | /* Just allow a single thread to run. */ |
| 2005 | { |
| 2006 | struct proc *thread = inf_tid_to_thread (inf, ptid_get_tid (ptid)); |
| 2007 | if (!thread) |
| 2008 | error (_("Can't run single thread id %s: no such thread!"), |
| 2009 | target_pid_to_str (ptid)); |
| 2010 | inf_debug (inf, "running one thread: %s", target_pid_to_str (ptid)); |
| 2011 | inf_set_threads_resume_sc (inf, thread, 0); |
| 2012 | } |
| 2013 | |
| 2014 | if (step) |
| 2015 | { |
| 2016 | step_thread = inf_tid_to_thread (inf, ptid_get_tid (ptid)); |
| 2017 | if (!step_thread) |
| 2018 | warning (_("Can't step thread id %s: no such thread."), |
| 2019 | target_pid_to_str (ptid)); |
| 2020 | else |
| 2021 | inf_debug (inf, "stepping thread: %s", target_pid_to_str (ptid)); |
| 2022 | } |
| 2023 | if (step_thread != inf->step_thread) |
| 2024 | inf_set_step_thread (inf, step_thread); |
| 2025 | |
| 2026 | inf_debug (inf, "here we go..."); |
| 2027 | inf_resume (inf); |
| 2028 | } |
| 2029 | |
| 2030 | \f |
| 2031 | static void |
| 2032 | gnu_kill_inferior (void) |
| 2033 | { |
| 2034 | struct proc *task = gnu_current_inf->task; |
| 2035 | if (task) |
| 2036 | { |
| 2037 | proc_debug (task, "terminating..."); |
| 2038 | task_terminate (task->port); |
| 2039 | inf_set_pid (gnu_current_inf, -1); |
| 2040 | } |
| 2041 | target_mourn_inferior (); |
| 2042 | } |
| 2043 | |
| 2044 | /* Clean up after the inferior dies. */ |
| 2045 | static void |
| 2046 | gnu_mourn_inferior (struct target_ops *ops) |
| 2047 | { |
| 2048 | inf_debug (gnu_current_inf, "rip"); |
| 2049 | inf_detach (gnu_current_inf); |
| 2050 | unpush_target (&gnu_ops); |
| 2051 | generic_mourn_inferior (); |
| 2052 | } |
| 2053 | |
| 2054 | \f |
| 2055 | /* Fork an inferior process, and start debugging it. */ |
| 2056 | |
| 2057 | /* Set INFERIOR_PID to the first thread available in the child, if any. */ |
| 2058 | static int |
| 2059 | inf_pick_first_thread (void) |
| 2060 | { |
| 2061 | if (gnu_current_inf->task && gnu_current_inf->threads) |
| 2062 | /* The first thread. */ |
| 2063 | return gnu_current_inf->threads->tid; |
| 2064 | else |
| 2065 | /* What may be the next thread. */ |
| 2066 | return next_thread_id; |
| 2067 | } |
| 2068 | |
| 2069 | static struct inf * |
| 2070 | cur_inf (void) |
| 2071 | { |
| 2072 | if (!gnu_current_inf) |
| 2073 | gnu_current_inf = make_inf (); |
| 2074 | return gnu_current_inf; |
| 2075 | } |
| 2076 | |
| 2077 | static void |
| 2078 | gnu_create_inferior (struct target_ops *ops, |
| 2079 | char *exec_file, char *allargs, char **env, |
| 2080 | int from_tty) |
| 2081 | { |
| 2082 | struct inf *inf = cur_inf (); |
| 2083 | |
| 2084 | void trace_me () |
| 2085 | { |
| 2086 | /* We're in the child; make this process stop as soon as it execs. */ |
| 2087 | inf_debug (inf, "tracing self"); |
| 2088 | if (ptrace (PTRACE_TRACEME) != 0) |
| 2089 | error (_("ptrace (PTRACE_TRACEME) failed!")); |
| 2090 | } |
| 2091 | void attach_to_child (int pid) |
| 2092 | { |
| 2093 | /* Attach to the now stopped child, which is actually a shell... */ |
| 2094 | inf_debug (inf, "attaching to child: %d", pid); |
| 2095 | |
| 2096 | inf_attach (inf, pid); |
| 2097 | |
| 2098 | push_target (&gnu_ops); |
| 2099 | |
| 2100 | inf->pending_execs = 2; |
| 2101 | inf->nomsg = 1; |
| 2102 | inf->traced = 1; |
| 2103 | |
| 2104 | /* Now let the child run again, knowing that it will stop immediately |
| 2105 | because of the ptrace. */ |
| 2106 | inf_resume (inf); |
| 2107 | |
| 2108 | /* We now have thread info. */ |
| 2109 | thread_change_ptid (inferior_ptid, |
| 2110 | ptid_build (inf->pid, 0, inf_pick_first_thread ())); |
| 2111 | |
| 2112 | startup_inferior (inf->pending_execs); |
| 2113 | } |
| 2114 | |
| 2115 | inf_debug (inf, "creating inferior"); |
| 2116 | |
| 2117 | fork_inferior (exec_file, allargs, env, trace_me, attach_to_child, |
| 2118 | NULL, NULL); |
| 2119 | |
| 2120 | inf_validate_procinfo (inf); |
| 2121 | inf_update_signal_thread (inf); |
| 2122 | inf_set_traced (inf, inf->want_signals); |
| 2123 | |
| 2124 | /* Execing the process will have trashed our exception ports; steal them |
| 2125 | back (or make sure they're restored if the user wants that). */ |
| 2126 | if (inf->want_exceptions) |
| 2127 | inf_steal_exc_ports (inf); |
| 2128 | else |
| 2129 | inf_restore_exc_ports (inf); |
| 2130 | } |
| 2131 | |
| 2132 | /* Mark our target-struct as eligible for stray "run" and "attach" |
| 2133 | commands. */ |
| 2134 | static int |
| 2135 | gnu_can_run (void) |
| 2136 | { |
| 2137 | return 1; |
| 2138 | } |
| 2139 | |
| 2140 | \f |
| 2141 | /* Attach to process PID, then initialize for debugging it |
| 2142 | and wait for the trace-trap that results from attaching. */ |
| 2143 | static void |
| 2144 | gnu_attach (struct target_ops *ops, char *args, int from_tty) |
| 2145 | { |
| 2146 | int pid; |
| 2147 | char *exec_file; |
| 2148 | struct inf *inf = cur_inf (); |
| 2149 | struct inferior *inferior; |
| 2150 | |
| 2151 | if (!args) |
| 2152 | error_no_arg (_("process-id to attach")); |
| 2153 | |
| 2154 | pid = atoi (args); |
| 2155 | |
| 2156 | if (pid == getpid ()) /* Trying to masturbate? */ |
| 2157 | error (_("I refuse to debug myself!")); |
| 2158 | |
| 2159 | if (from_tty) |
| 2160 | { |
| 2161 | exec_file = (char *) get_exec_file (0); |
| 2162 | |
| 2163 | if (exec_file) |
| 2164 | printf_unfiltered ("Attaching to program `%s', pid %d\n", |
| 2165 | exec_file, pid); |
| 2166 | else |
| 2167 | printf_unfiltered ("Attaching to pid %d\n", pid); |
| 2168 | |
| 2169 | gdb_flush (gdb_stdout); |
| 2170 | } |
| 2171 | |
| 2172 | inf_debug (inf, "attaching to pid: %d", pid); |
| 2173 | |
| 2174 | inf_attach (inf, pid); |
| 2175 | |
| 2176 | push_target (&gnu_ops); |
| 2177 | |
| 2178 | inferior = add_inferior (pid); |
| 2179 | inferior->attach_flag = 1; |
| 2180 | |
| 2181 | inf_update_procs (inf); |
| 2182 | |
| 2183 | inferior_ptid = ptid_build (pid, 0, inf_pick_first_thread ()); |
| 2184 | |
| 2185 | /* We have to initialize the terminal settings now, since the code |
| 2186 | below might try to restore them. */ |
| 2187 | target_terminal_init (); |
| 2188 | |
| 2189 | /* If the process was stopped before we attached, make it continue the next |
| 2190 | time the user does a continue. */ |
| 2191 | inf_validate_procinfo (inf); |
| 2192 | |
| 2193 | inf_update_signal_thread (inf); |
| 2194 | inf_set_traced (inf, inf->want_signals); |
| 2195 | |
| 2196 | #if 0 /* Do we need this? */ |
| 2197 | renumber_threads (0); /* Give our threads reasonable names. */ |
| 2198 | #endif |
| 2199 | } |
| 2200 | |
| 2201 | \f |
| 2202 | /* Take a program previously attached to and detaches it. |
| 2203 | The program resumes execution and will no longer stop |
| 2204 | on signals, etc. We'd better not have left any breakpoints |
| 2205 | in the program or it'll die when it hits one. For this |
| 2206 | to work, it may be necessary for the process to have been |
| 2207 | previously attached. It *might* work if the program was |
| 2208 | started via fork. */ |
| 2209 | static void |
| 2210 | gnu_detach (struct target_ops *ops, char *args, int from_tty) |
| 2211 | { |
| 2212 | int pid; |
| 2213 | |
| 2214 | if (from_tty) |
| 2215 | { |
| 2216 | char *exec_file = get_exec_file (0); |
| 2217 | if (exec_file) |
| 2218 | printf_unfiltered ("Detaching from program `%s' pid %d\n", |
| 2219 | exec_file, gnu_current_inf->pid); |
| 2220 | else |
| 2221 | printf_unfiltered ("Detaching from pid %d\n", gnu_current_inf->pid); |
| 2222 | gdb_flush (gdb_stdout); |
| 2223 | } |
| 2224 | |
| 2225 | pid = gnu_current_inf->pid; |
| 2226 | |
| 2227 | inf_detach (gnu_current_inf); |
| 2228 | |
| 2229 | inferior_ptid = null_ptid; |
| 2230 | detach_inferior (pid); |
| 2231 | |
| 2232 | unpush_target (&gnu_ops); /* Pop out of handling an inferior */ |
| 2233 | } |
| 2234 | \f |
| 2235 | static void |
| 2236 | gnu_terminal_init_inferior (void) |
| 2237 | { |
| 2238 | gdb_assert (gnu_current_inf); |
| 2239 | terminal_init_inferior_with_pgrp (gnu_current_inf->pid); |
| 2240 | } |
| 2241 | |
| 2242 | /* Get ready to modify the registers array. On machines which store |
| 2243 | individual registers, this doesn't need to do anything. On machines |
| 2244 | which store all the registers in one fell swoop, this makes sure |
| 2245 | that registers contains all the registers from the program being |
| 2246 | debugged. */ |
| 2247 | static void |
| 2248 | gnu_prepare_to_store (struct regcache *regcache) |
| 2249 | { |
| 2250 | } |
| 2251 | |
| 2252 | static void |
| 2253 | gnu_open (char *arg, int from_tty) |
| 2254 | { |
| 2255 | error (_("Use the \"run\" command to start a Unix child process.")); |
| 2256 | } |
| 2257 | |
| 2258 | static void |
| 2259 | gnu_stop (ptid_t ptid) |
| 2260 | { |
| 2261 | error (_("to_stop target function not implemented")); |
| 2262 | } |
| 2263 | |
| 2264 | static int |
| 2265 | gnu_thread_alive (ptid_t ptid) |
| 2266 | { |
| 2267 | inf_update_procs (gnu_current_inf); |
| 2268 | return !!inf_tid_to_thread (gnu_current_inf, |
| 2269 | ptid_get_tid (ptid)); |
| 2270 | } |
| 2271 | |
| 2272 | \f |
| 2273 | /* Read inferior task's LEN bytes from ADDR and copy it to MYADDR in |
| 2274 | gdb's address space. Return 0 on failure; number of bytes read |
| 2275 | otherwise. */ |
| 2276 | int |
| 2277 | gnu_read_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length) |
| 2278 | { |
| 2279 | error_t err; |
| 2280 | vm_address_t low_address = (vm_address_t) trunc_page (addr); |
| 2281 | vm_size_t aligned_length = |
| 2282 | (vm_size_t) round_page (addr + length) - low_address; |
| 2283 | pointer_t copied; |
| 2284 | int copy_count; |
| 2285 | |
| 2286 | /* Get memory from inferior with page aligned addresses */ |
| 2287 | err = vm_read (task, low_address, aligned_length, &copied, ©_count); |
| 2288 | if (err) |
| 2289 | return 0; |
| 2290 | |
| 2291 | err = hurd_safe_copyin (myaddr, (void *) (addr - low_address + copied), length); |
| 2292 | if (err) |
| 2293 | { |
| 2294 | warning (_("Read from inferior faulted: %s"), safe_strerror (err)); |
| 2295 | length = 0; |
| 2296 | } |
| 2297 | |
| 2298 | err = vm_deallocate (mach_task_self (), copied, copy_count); |
| 2299 | if (err) |
| 2300 | warning (_("gnu_read_inferior vm_deallocate failed: %s"), safe_strerror (err)); |
| 2301 | |
| 2302 | return length; |
| 2303 | } |
| 2304 | |
| 2305 | #define CHK_GOTO_OUT(str,ret) \ |
| 2306 | do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0) |
| 2307 | |
| 2308 | struct vm_region_list |
| 2309 | { |
| 2310 | struct vm_region_list *next; |
| 2311 | vm_prot_t protection; |
| 2312 | vm_address_t start; |
| 2313 | vm_size_t length; |
| 2314 | }; |
| 2315 | |
| 2316 | struct obstack region_obstack; |
| 2317 | |
| 2318 | /* Write gdb's LEN bytes from MYADDR and copy it to ADDR in inferior |
| 2319 | task's address space. */ |
| 2320 | int |
| 2321 | gnu_write_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length) |
| 2322 | { |
| 2323 | error_t err = 0; |
| 2324 | vm_address_t low_address = (vm_address_t) trunc_page (addr); |
| 2325 | vm_size_t aligned_length = |
| 2326 | (vm_size_t) round_page (addr + length) - low_address; |
| 2327 | pointer_t copied; |
| 2328 | int copy_count; |
| 2329 | int deallocate = 0; |
| 2330 | |
| 2331 | char *errstr = "Bug in gnu_write_inferior"; |
| 2332 | |
| 2333 | struct vm_region_list *region_element; |
| 2334 | struct vm_region_list *region_head = (struct vm_region_list *) NULL; |
| 2335 | |
| 2336 | /* Get memory from inferior with page aligned addresses */ |
| 2337 | err = vm_read (task, |
| 2338 | low_address, |
| 2339 | aligned_length, |
| 2340 | &copied, |
| 2341 | ©_count); |
| 2342 | CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err); |
| 2343 | |
| 2344 | deallocate++; |
| 2345 | |
| 2346 | err = hurd_safe_copyout ((void *) (addr - low_address + copied), |
| 2347 | myaddr, length); |
| 2348 | CHK_GOTO_OUT ("Write to inferior faulted", err); |
| 2349 | |
| 2350 | obstack_init (®ion_obstack); |
| 2351 | |
| 2352 | /* Do writes atomically. |
| 2353 | First check for holes and unwritable memory. */ |
| 2354 | { |
| 2355 | vm_size_t remaining_length = aligned_length; |
| 2356 | vm_address_t region_address = low_address; |
| 2357 | |
| 2358 | struct vm_region_list *scan; |
| 2359 | |
| 2360 | while (region_address < low_address + aligned_length) |
| 2361 | { |
| 2362 | vm_prot_t protection; |
| 2363 | vm_prot_t max_protection; |
| 2364 | vm_inherit_t inheritance; |
| 2365 | boolean_t shared; |
| 2366 | mach_port_t object_name; |
| 2367 | vm_offset_t offset; |
| 2368 | vm_size_t region_length = remaining_length; |
| 2369 | vm_address_t old_address = region_address; |
| 2370 | |
| 2371 | err = vm_region (task, |
| 2372 | ®ion_address, |
| 2373 | ®ion_length, |
| 2374 | &protection, |
| 2375 | &max_protection, |
| 2376 | &inheritance, |
| 2377 | &shared, |
| 2378 | &object_name, |
| 2379 | &offset); |
| 2380 | CHK_GOTO_OUT ("vm_region failed", err); |
| 2381 | |
| 2382 | /* Check for holes in memory */ |
| 2383 | if (old_address != region_address) |
| 2384 | { |
| 2385 | warning (_("No memory at 0x%x. Nothing written"), |
| 2386 | old_address); |
| 2387 | err = KERN_SUCCESS; |
| 2388 | length = 0; |
| 2389 | goto out; |
| 2390 | } |
| 2391 | |
| 2392 | if (!(max_protection & VM_PROT_WRITE)) |
| 2393 | { |
| 2394 | warning (_("Memory at address 0x%x is unwritable. Nothing written"), |
| 2395 | old_address); |
| 2396 | err = KERN_SUCCESS; |
| 2397 | length = 0; |
| 2398 | goto out; |
| 2399 | } |
| 2400 | |
| 2401 | /* Chain the regions for later use */ |
| 2402 | region_element = |
| 2403 | (struct vm_region_list *) |
| 2404 | obstack_alloc (®ion_obstack, sizeof (struct vm_region_list)); |
| 2405 | |
| 2406 | region_element->protection = protection; |
| 2407 | region_element->start = region_address; |
| 2408 | region_element->length = region_length; |
| 2409 | |
| 2410 | /* Chain the regions along with protections */ |
| 2411 | region_element->next = region_head; |
| 2412 | region_head = region_element; |
| 2413 | |
| 2414 | region_address += region_length; |
| 2415 | remaining_length = remaining_length - region_length; |
| 2416 | } |
| 2417 | |
| 2418 | /* If things fail after this, we give up. |
| 2419 | Somebody is messing up inferior_task's mappings. */ |
| 2420 | |
| 2421 | /* Enable writes to the chained vm regions */ |
| 2422 | for (scan = region_head; scan; scan = scan->next) |
| 2423 | { |
| 2424 | if (!(scan->protection & VM_PROT_WRITE)) |
| 2425 | { |
| 2426 | err = vm_protect (task, |
| 2427 | scan->start, |
| 2428 | scan->length, |
| 2429 | FALSE, |
| 2430 | scan->protection | VM_PROT_WRITE); |
| 2431 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); |
| 2432 | } |
| 2433 | } |
| 2434 | |
| 2435 | err = vm_write (task, |
| 2436 | low_address, |
| 2437 | copied, |
| 2438 | aligned_length); |
| 2439 | CHK_GOTO_OUT ("vm_write failed", err); |
| 2440 | |
| 2441 | /* Set up the original region protections, if they were changed */ |
| 2442 | for (scan = region_head; scan; scan = scan->next) |
| 2443 | { |
| 2444 | if (!(scan->protection & VM_PROT_WRITE)) |
| 2445 | { |
| 2446 | err = vm_protect (task, |
| 2447 | scan->start, |
| 2448 | scan->length, |
| 2449 | FALSE, |
| 2450 | scan->protection); |
| 2451 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); |
| 2452 | } |
| 2453 | } |
| 2454 | } |
| 2455 | |
| 2456 | out: |
| 2457 | if (deallocate) |
| 2458 | { |
| 2459 | obstack_free (®ion_obstack, 0); |
| 2460 | |
| 2461 | (void) vm_deallocate (mach_task_self (), |
| 2462 | copied, |
| 2463 | copy_count); |
| 2464 | } |
| 2465 | |
| 2466 | if (err != KERN_SUCCESS) |
| 2467 | { |
| 2468 | warning (_("%s: %s"), errstr, mach_error_string (err)); |
| 2469 | return 0; |
| 2470 | } |
| 2471 | |
| 2472 | return length; |
| 2473 | } |
| 2474 | |
| 2475 | \f |
| 2476 | /* Return 0 on failure, number of bytes handled otherwise. TARGET |
| 2477 | is ignored. */ |
| 2478 | static int |
| 2479 | gnu_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, |
| 2480 | struct mem_attrib *attrib, |
| 2481 | struct target_ops *target) |
| 2482 | { |
| 2483 | task_t task = (gnu_current_inf |
| 2484 | ? (gnu_current_inf->task |
| 2485 | ? gnu_current_inf->task->port : 0) |
| 2486 | : 0); |
| 2487 | |
| 2488 | if (task == MACH_PORT_NULL) |
| 2489 | return 0; |
| 2490 | else |
| 2491 | { |
| 2492 | inf_debug (gnu_current_inf, "%s %p[%d] %s %p", |
| 2493 | write ? "writing" : "reading", (void *) memaddr, len, |
| 2494 | write ? "<--" : "-->", myaddr); |
| 2495 | if (write) |
| 2496 | return gnu_write_inferior (task, memaddr, myaddr, len); |
| 2497 | else |
| 2498 | return gnu_read_inferior (task, memaddr, myaddr, len); |
| 2499 | } |
| 2500 | } |
| 2501 | |
| 2502 | /* Call FUNC on each memory region in the task. */ |
| 2503 | static int |
| 2504 | gnu_find_memory_regions (int (*func) (CORE_ADDR, |
| 2505 | unsigned long, |
| 2506 | int, int, int, |
| 2507 | void *), |
| 2508 | void *data) |
| 2509 | { |
| 2510 | error_t err; |
| 2511 | task_t task; |
| 2512 | vm_address_t region_address, last_region_address, last_region_end; |
| 2513 | vm_prot_t last_protection; |
| 2514 | |
| 2515 | if (gnu_current_inf == 0 || gnu_current_inf->task == 0) |
| 2516 | return 0; |
| 2517 | task = gnu_current_inf->task->port; |
| 2518 | if (task == MACH_PORT_NULL) |
| 2519 | return 0; |
| 2520 | |
| 2521 | region_address = last_region_address = last_region_end = VM_MIN_ADDRESS; |
| 2522 | last_protection = VM_PROT_NONE; |
| 2523 | while (region_address < VM_MAX_ADDRESS) |
| 2524 | { |
| 2525 | vm_prot_t protection; |
| 2526 | vm_prot_t max_protection; |
| 2527 | vm_inherit_t inheritance; |
| 2528 | boolean_t shared; |
| 2529 | mach_port_t object_name; |
| 2530 | vm_offset_t offset; |
| 2531 | vm_size_t region_length = VM_MAX_ADDRESS - region_address; |
| 2532 | vm_address_t old_address = region_address; |
| 2533 | |
| 2534 | err = vm_region (task, |
| 2535 | ®ion_address, |
| 2536 | ®ion_length, |
| 2537 | &protection, |
| 2538 | &max_protection, |
| 2539 | &inheritance, |
| 2540 | &shared, |
| 2541 | &object_name, |
| 2542 | &offset); |
| 2543 | if (err == KERN_NO_SPACE) |
| 2544 | break; |
| 2545 | if (err != KERN_SUCCESS) |
| 2546 | { |
| 2547 | warning (_("vm_region failed: %s"), mach_error_string (err)); |
| 2548 | return -1; |
| 2549 | } |
| 2550 | |
| 2551 | if (protection == last_protection && region_address == last_region_end) |
| 2552 | /* This region is contiguous with and indistinguishable from |
| 2553 | the previous one, so we just extend that one. */ |
| 2554 | last_region_end = region_address += region_length; |
| 2555 | else |
| 2556 | { |
| 2557 | /* This region is distinct from the last one we saw, so report |
| 2558 | that previous one. */ |
| 2559 | if (last_protection != VM_PROT_NONE) |
| 2560 | (*func) (last_region_address, |
| 2561 | last_region_end - last_region_address, |
| 2562 | last_protection & VM_PROT_READ, |
| 2563 | last_protection & VM_PROT_WRITE, |
| 2564 | last_protection & VM_PROT_EXECUTE, |
| 2565 | data); |
| 2566 | last_region_address = region_address; |
| 2567 | last_region_end = region_address += region_length; |
| 2568 | last_protection = protection; |
| 2569 | } |
| 2570 | } |
| 2571 | |
| 2572 | /* Report the final region. */ |
| 2573 | if (last_region_end > last_region_address && last_protection != VM_PROT_NONE) |
| 2574 | (*func) (last_region_address, last_region_end - last_region_address, |
| 2575 | last_protection & VM_PROT_READ, |
| 2576 | last_protection & VM_PROT_WRITE, |
| 2577 | last_protection & VM_PROT_EXECUTE, |
| 2578 | data); |
| 2579 | |
| 2580 | return 0; |
| 2581 | } |
| 2582 | |
| 2583 | \f |
| 2584 | /* Return printable description of proc. */ |
| 2585 | char * |
| 2586 | proc_string (struct proc *proc) |
| 2587 | { |
| 2588 | static char tid_str[80]; |
| 2589 | if (proc_is_task (proc)) |
| 2590 | sprintf (tid_str, "process %d", proc->inf->pid); |
| 2591 | else |
| 2592 | sprintf (tid_str, "Thread %d.%d", |
| 2593 | proc->inf->pid, proc->tid); |
| 2594 | return tid_str; |
| 2595 | } |
| 2596 | |
| 2597 | static char * |
| 2598 | gnu_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| 2599 | { |
| 2600 | struct inf *inf = gnu_current_inf; |
| 2601 | int tid = ptid_get_tid (ptid); |
| 2602 | struct proc *thread = inf_tid_to_thread (inf, tid); |
| 2603 | |
| 2604 | if (thread) |
| 2605 | return proc_string (thread); |
| 2606 | else |
| 2607 | { |
| 2608 | static char tid_str[80]; |
| 2609 | sprintf (tid_str, "bogus thread id %d", tid); |
| 2610 | return tid_str; |
| 2611 | } |
| 2612 | } |
| 2613 | |
| 2614 | \f |
| 2615 | extern void gnu_store_registers (struct regcache *regcache, int regno); |
| 2616 | extern void gnu_fetch_registers (struct regcache *regcache, int regno); |
| 2617 | |
| 2618 | struct target_ops gnu_ops; |
| 2619 | |
| 2620 | static void |
| 2621 | init_gnu_ops (void) |
| 2622 | { |
| 2623 | gnu_ops.to_shortname = "GNU"; /* to_shortname */ |
| 2624 | gnu_ops.to_longname = "GNU Hurd process"; /* to_longname */ |
| 2625 | gnu_ops.to_doc = "GNU Hurd process"; /* to_doc */ |
| 2626 | gnu_ops.to_open = gnu_open; /* to_open */ |
| 2627 | gnu_ops.to_attach = gnu_attach; /* to_attach */ |
| 2628 | gnu_ops.to_attach_no_wait = 1; /* to_attach_no_wait */ |
| 2629 | gnu_ops.to_detach = gnu_detach; /* to_detach */ |
| 2630 | gnu_ops.to_resume = gnu_resume; /* to_resume */ |
| 2631 | gnu_ops.to_wait = gnu_wait; /* to_wait */ |
| 2632 | gnu_ops.to_fetch_registers = gnu_fetch_registers; /* to_fetch_registers */ |
| 2633 | gnu_ops.to_store_registers = gnu_store_registers; /* to_store_registers */ |
| 2634 | gnu_ops.to_prepare_to_store = gnu_prepare_to_store; /* to_prepare_to_store */ |
| 2635 | gnu_ops.deprecated_xfer_memory = gnu_xfer_memory; |
| 2636 | gnu_ops.to_find_memory_regions = gnu_find_memory_regions; |
| 2637 | gnu_ops.to_insert_breakpoint = memory_insert_breakpoint; |
| 2638 | gnu_ops.to_remove_breakpoint = memory_remove_breakpoint; |
| 2639 | gnu_ops.to_terminal_init = gnu_terminal_init_inferior; |
| 2640 | gnu_ops.to_terminal_inferior = terminal_inferior; |
| 2641 | gnu_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
| 2642 | gnu_ops.to_terminal_save_ours = terminal_save_ours; |
| 2643 | gnu_ops.to_terminal_ours = terminal_ours; |
| 2644 | gnu_ops.to_terminal_info = child_terminal_info; |
| 2645 | gnu_ops.to_kill = gnu_kill_inferior; /* to_kill */ |
| 2646 | gnu_ops.to_create_inferior = gnu_create_inferior; /* to_create_inferior */ |
| 2647 | gnu_ops.to_mourn_inferior = gnu_mourn_inferior; /* to_mourn_inferior */ |
| 2648 | gnu_ops.to_can_run = gnu_can_run; /* to_can_run */ |
| 2649 | gnu_ops.to_thread_alive = gnu_thread_alive; /* to_thread_alive */ |
| 2650 | gnu_ops.to_pid_to_str = gnu_pid_to_str; /* to_pid_to_str */ |
| 2651 | gnu_ops.to_stop = gnu_stop; /* to_stop */ |
| 2652 | gnu_ops.to_stratum = process_stratum; /* to_stratum */ |
| 2653 | gnu_ops.to_has_all_memory = 1; /* to_has_all_memory */ |
| 2654 | gnu_ops.to_has_memory = 1; /* to_has_memory */ |
| 2655 | gnu_ops.to_has_stack = 1; /* to_has_stack */ |
| 2656 | gnu_ops.to_has_registers = 1; /* to_has_registers */ |
| 2657 | gnu_ops.to_has_execution = 1; /* to_has_execution */ |
| 2658 | gnu_ops.to_magic = OPS_MAGIC; /* to_magic */ |
| 2659 | } /* init_gnu_ops */ |
| 2660 | |
| 2661 | \f |
| 2662 | /* User task commands. */ |
| 2663 | |
| 2664 | struct cmd_list_element *set_task_cmd_list = 0; |
| 2665 | struct cmd_list_element *show_task_cmd_list = 0; |
| 2666 | /* User thread commands. */ |
| 2667 | |
| 2668 | /* Commands with a prefix of `set/show thread'. */ |
| 2669 | extern struct cmd_list_element *thread_cmd_list; |
| 2670 | struct cmd_list_element *set_thread_cmd_list = NULL; |
| 2671 | struct cmd_list_element *show_thread_cmd_list = NULL; |
| 2672 | |
| 2673 | /* Commands with a prefix of `set/show thread default'. */ |
| 2674 | struct cmd_list_element *set_thread_default_cmd_list = NULL; |
| 2675 | struct cmd_list_element *show_thread_default_cmd_list = NULL; |
| 2676 | |
| 2677 | static void |
| 2678 | set_thread_cmd (char *args, int from_tty) |
| 2679 | { |
| 2680 | printf_unfiltered ("\"set thread\" must be followed by the name of a thread property, or \"default\".\n"); |
| 2681 | } |
| 2682 | |
| 2683 | static void |
| 2684 | show_thread_cmd (char *args, int from_tty) |
| 2685 | { |
| 2686 | printf_unfiltered ("\"show thread\" must be followed by the name of a thread property, or \"default\".\n"); |
| 2687 | } |
| 2688 | |
| 2689 | static void |
| 2690 | set_thread_default_cmd (char *args, int from_tty) |
| 2691 | { |
| 2692 | printf_unfiltered ("\"set thread default\" must be followed by the name of a thread property.\n"); |
| 2693 | } |
| 2694 | |
| 2695 | static void |
| 2696 | show_thread_default_cmd (char *args, int from_tty) |
| 2697 | { |
| 2698 | printf_unfiltered ("\"show thread default\" must be followed by the name of a thread property.\n"); |
| 2699 | } |
| 2700 | |
| 2701 | static int |
| 2702 | parse_int_arg (char *args, char *cmd_prefix) |
| 2703 | { |
| 2704 | if (args) |
| 2705 | { |
| 2706 | char *arg_end; |
| 2707 | int val = strtoul (args, &arg_end, 10); |
| 2708 | if (*args && *arg_end == '\0') |
| 2709 | return val; |
| 2710 | } |
| 2711 | error (_("Illegal argument for \"%s\" command, should be an integer."), cmd_prefix); |
| 2712 | } |
| 2713 | |
| 2714 | static int |
| 2715 | _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix) |
| 2716 | { |
| 2717 | if (!args || strcmp (args, t_val) == 0) |
| 2718 | return 1; |
| 2719 | else if (strcmp (args, f_val) == 0) |
| 2720 | return 0; |
| 2721 | else |
| 2722 | error (_("Illegal argument for \"%s\" command, should be \"%s\" or \"%s\"."), |
| 2723 | cmd_prefix, t_val, f_val); |
| 2724 | } |
| 2725 | |
| 2726 | #define parse_bool_arg(args, cmd_prefix) \ |
| 2727 | _parse_bool_arg (args, "on", "off", cmd_prefix) |
| 2728 | |
| 2729 | static void |
| 2730 | check_empty (char *args, char *cmd_prefix) |
| 2731 | { |
| 2732 | if (args) |
| 2733 | error (_("Garbage after \"%s\" command: `%s'"), cmd_prefix, args); |
| 2734 | } |
| 2735 | |
| 2736 | /* Returns the alive thread named by INFERIOR_PID, or signals an error. */ |
| 2737 | static struct proc * |
| 2738 | cur_thread (void) |
| 2739 | { |
| 2740 | struct inf *inf = cur_inf (); |
| 2741 | struct proc *thread = inf_tid_to_thread (inf, |
| 2742 | ptid_get_tid (inferior_ptid)); |
| 2743 | if (!thread) |
| 2744 | error (_("No current thread.")); |
| 2745 | return thread; |
| 2746 | } |
| 2747 | |
| 2748 | /* Returns the current inferior, but signals an error if it has no task. */ |
| 2749 | static struct inf * |
| 2750 | active_inf (void) |
| 2751 | { |
| 2752 | struct inf *inf = cur_inf (); |
| 2753 | if (!inf->task) |
| 2754 | error (_("No current process.")); |
| 2755 | return inf; |
| 2756 | } |
| 2757 | |
| 2758 | \f |
| 2759 | static void |
| 2760 | set_task_pause_cmd (char *args, int from_tty) |
| 2761 | { |
| 2762 | struct inf *inf = cur_inf (); |
| 2763 | int old_sc = inf->pause_sc; |
| 2764 | |
| 2765 | inf->pause_sc = parse_bool_arg (args, "set task pause"); |
| 2766 | |
| 2767 | if (old_sc == 0 && inf->pause_sc != 0) |
| 2768 | /* If the task is currently unsuspended, immediately suspend it, |
| 2769 | otherwise wait until the next time it gets control. */ |
| 2770 | inf_suspend (inf); |
| 2771 | } |
| 2772 | |
| 2773 | static void |
| 2774 | show_task_pause_cmd (char *args, int from_tty) |
| 2775 | { |
| 2776 | struct inf *inf = cur_inf (); |
| 2777 | check_empty (args, "show task pause"); |
| 2778 | printf_unfiltered ("The inferior task %s suspended while gdb has control.\n", |
| 2779 | inf->task |
| 2780 | ? (inf->pause_sc == 0 ? "isn't" : "is") |
| 2781 | : (inf->pause_sc == 0 ? "won't be" : "will be")); |
| 2782 | } |
| 2783 | |
| 2784 | static void |
| 2785 | set_task_detach_sc_cmd (char *args, int from_tty) |
| 2786 | { |
| 2787 | cur_inf ()->detach_sc = parse_int_arg (args, "set task detach-suspend-count"); |
| 2788 | } |
| 2789 | |
| 2790 | static void |
| 2791 | show_task_detach_sc_cmd (char *args, int from_tty) |
| 2792 | { |
| 2793 | check_empty (args, "show task detach-suspend-count"); |
| 2794 | printf_unfiltered ("The inferior task will be left with a suspend count of %d when detaching.\n", |
| 2795 | cur_inf ()->detach_sc); |
| 2796 | } |
| 2797 | |
| 2798 | \f |
| 2799 | static void |
| 2800 | set_thread_default_pause_cmd (char *args, int from_tty) |
| 2801 | { |
| 2802 | struct inf *inf = cur_inf (); |
| 2803 | inf->default_thread_pause_sc = |
| 2804 | parse_bool_arg (args, "set thread default pause") ? 0 : 1; |
| 2805 | } |
| 2806 | |
| 2807 | static void |
| 2808 | show_thread_default_pause_cmd (char *args, int from_tty) |
| 2809 | { |
| 2810 | struct inf *inf = cur_inf (); |
| 2811 | int sc = inf->default_thread_pause_sc; |
| 2812 | check_empty (args, "show thread default pause"); |
| 2813 | printf_unfiltered ("New threads %s suspended while gdb has control%s.\n", |
| 2814 | sc ? "are" : "aren't", |
| 2815 | !sc && inf->pause_sc ? " (but the task is)" : ""); |
| 2816 | } |
| 2817 | |
| 2818 | static void |
| 2819 | set_thread_default_run_cmd (char *args, int from_tty) |
| 2820 | { |
| 2821 | struct inf *inf = cur_inf (); |
| 2822 | inf->default_thread_run_sc = |
| 2823 | parse_bool_arg (args, "set thread default run") ? 0 : 1; |
| 2824 | } |
| 2825 | |
| 2826 | static void |
| 2827 | show_thread_default_run_cmd (char *args, int from_tty) |
| 2828 | { |
| 2829 | struct inf *inf = cur_inf (); |
| 2830 | check_empty (args, "show thread default run"); |
| 2831 | printf_unfiltered ("New threads %s allowed to run.\n", |
| 2832 | inf->default_thread_run_sc == 0 ? "are" : "aren't"); |
| 2833 | } |
| 2834 | |
| 2835 | static void |
| 2836 | set_thread_default_detach_sc_cmd (char *args, int from_tty) |
| 2837 | { |
| 2838 | cur_inf ()->default_thread_detach_sc = |
| 2839 | parse_int_arg (args, "set thread default detach-suspend-count"); |
| 2840 | } |
| 2841 | |
| 2842 | static void |
| 2843 | show_thread_default_detach_sc_cmd (char *args, int from_tty) |
| 2844 | { |
| 2845 | check_empty (args, "show thread default detach-suspend-count"); |
| 2846 | printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n", |
| 2847 | cur_inf ()->default_thread_detach_sc); |
| 2848 | } |
| 2849 | |
| 2850 | \f |
| 2851 | /* Steal a send right called NAME in the inferior task, and make it PROC's |
| 2852 | saved exception port. */ |
| 2853 | static void |
| 2854 | steal_exc_port (struct proc *proc, mach_port_t name) |
| 2855 | { |
| 2856 | error_t err; |
| 2857 | mach_port_t port; |
| 2858 | mach_msg_type_name_t port_type; |
| 2859 | |
| 2860 | if (!proc || !proc->inf->task) |
| 2861 | error (_("No inferior task.")); |
| 2862 | |
| 2863 | err = mach_port_extract_right (proc->inf->task->port, |
| 2864 | name, MACH_MSG_TYPE_COPY_SEND, |
| 2865 | &port, &port_type); |
| 2866 | if (err) |
| 2867 | error (_("Couldn't extract send right %d from inferior: %s"), |
| 2868 | name, safe_strerror (err)); |
| 2869 | |
| 2870 | if (proc->saved_exc_port) |
| 2871 | /* Get rid of our reference to the old one. */ |
| 2872 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| 2873 | |
| 2874 | proc->saved_exc_port = port; |
| 2875 | |
| 2876 | if (!proc->exc_port) |
| 2877 | /* If PROC is a thread, we may not have set its exception port before. |
| 2878 | We can't use proc_steal_exc_port because it also sets saved_exc_port. */ |
| 2879 | { |
| 2880 | proc->exc_port = proc->inf->event_port; |
| 2881 | err = proc_set_exception_port (proc, proc->exc_port); |
| 2882 | error (_("Can't set exception port for %s: %s"), |
| 2883 | proc_string (proc), safe_strerror (err)); |
| 2884 | } |
| 2885 | } |
| 2886 | |
| 2887 | static void |
| 2888 | set_task_exc_port_cmd (char *args, int from_tty) |
| 2889 | { |
| 2890 | struct inf *inf = cur_inf (); |
| 2891 | if (!args) |
| 2892 | error (_("No argument to \"set task exception-port\" command.")); |
| 2893 | steal_exc_port (inf->task, parse_and_eval_address (args)); |
| 2894 | } |
| 2895 | |
| 2896 | static void |
| 2897 | set_stopped_cmd (char *args, int from_tty) |
| 2898 | { |
| 2899 | cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped"); |
| 2900 | } |
| 2901 | |
| 2902 | static void |
| 2903 | show_stopped_cmd (char *args, int from_tty) |
| 2904 | { |
| 2905 | struct inf *inf = active_inf (); |
| 2906 | check_empty (args, "show stopped"); |
| 2907 | printf_unfiltered ("The inferior process %s stopped.\n", |
| 2908 | inf->stopped ? "is" : "isn't"); |
| 2909 | } |
| 2910 | |
| 2911 | static void |
| 2912 | set_sig_thread_cmd (char *args, int from_tty) |
| 2913 | { |
| 2914 | struct inf *inf = cur_inf (); |
| 2915 | |
| 2916 | if (!args || (!isdigit (*args) && strcmp (args, "none") != 0)) |
| 2917 | error (_("Illegal argument to \"set signal-thread\" command.\n" |
| 2918 | "Should be an integer thread ID, or `none'.")); |
| 2919 | |
| 2920 | if (strcmp (args, "none") == 0) |
| 2921 | inf->signal_thread = 0; |
| 2922 | else |
| 2923 | { |
| 2924 | int tid = ptid_get_tid (thread_id_to_pid (atoi (args))); |
| 2925 | if (tid < 0) |
| 2926 | error (_("Thread ID %s not known. Use the \"info threads\" command to\n" |
| 2927 | "see the IDs of currently known threads."), args); |
| 2928 | inf->signal_thread = inf_tid_to_thread (inf, tid); |
| 2929 | } |
| 2930 | } |
| 2931 | |
| 2932 | static void |
| 2933 | show_sig_thread_cmd (char *args, int from_tty) |
| 2934 | { |
| 2935 | struct inf *inf = active_inf (); |
| 2936 | check_empty (args, "show signal-thread"); |
| 2937 | if (inf->signal_thread) |
| 2938 | printf_unfiltered ("The signal thread is %s.\n", |
| 2939 | proc_string (inf->signal_thread)); |
| 2940 | else |
| 2941 | printf_unfiltered ("There is no signal thread.\n"); |
| 2942 | } |
| 2943 | |
| 2944 | \f |
| 2945 | static void |
| 2946 | set_signals_cmd (char *args, int from_tty) |
| 2947 | { |
| 2948 | struct inf *inf = cur_inf (); |
| 2949 | |
| 2950 | inf->want_signals = parse_bool_arg (args, "set signals"); |
| 2951 | |
| 2952 | if (inf->task && inf->want_signals != inf->traced) |
| 2953 | /* Make this take effect immediately in a running process. */ |
| 2954 | inf_set_traced (inf, inf->want_signals); |
| 2955 | } |
| 2956 | |
| 2957 | static void |
| 2958 | show_signals_cmd (char *args, int from_tty) |
| 2959 | { |
| 2960 | struct inf *inf = cur_inf (); |
| 2961 | check_empty (args, "show signals"); |
| 2962 | printf_unfiltered ("The inferior process's signals %s intercepted.\n", |
| 2963 | inf->task |
| 2964 | ? (inf->traced ? "are" : "aren't") |
| 2965 | : (inf->want_signals ? "will be" : "won't be")); |
| 2966 | } |
| 2967 | |
| 2968 | static void |
| 2969 | set_exceptions_cmd (char *args, int from_tty) |
| 2970 | { |
| 2971 | struct inf *inf = cur_inf (); |
| 2972 | int val = parse_bool_arg (args, "set exceptions"); |
| 2973 | |
| 2974 | if (inf->task && inf->want_exceptions != val) |
| 2975 | /* Make this take effect immediately in a running process. */ |
| 2976 | /* XXX */ ; |
| 2977 | |
| 2978 | inf->want_exceptions = val; |
| 2979 | } |
| 2980 | |
| 2981 | static void |
| 2982 | show_exceptions_cmd (char *args, int from_tty) |
| 2983 | { |
| 2984 | struct inf *inf = cur_inf (); |
| 2985 | check_empty (args, "show exceptions"); |
| 2986 | printf_unfiltered ("Exceptions in the inferior %s trapped.\n", |
| 2987 | inf->task |
| 2988 | ? (inf->want_exceptions ? "are" : "aren't") |
| 2989 | : (inf->want_exceptions ? "will be" : "won't be")); |
| 2990 | } |
| 2991 | |
| 2992 | \f |
| 2993 | static void |
| 2994 | set_task_cmd (char *args, int from_tty) |
| 2995 | { |
| 2996 | printf_unfiltered ("\"set task\" must be followed by the name" |
| 2997 | " of a task property.\n"); |
| 2998 | } |
| 2999 | |
| 3000 | static void |
| 3001 | show_task_cmd (char *args, int from_tty) |
| 3002 | { |
| 3003 | struct inf *inf = cur_inf (); |
| 3004 | |
| 3005 | check_empty (args, "show task"); |
| 3006 | |
| 3007 | show_signals_cmd (0, from_tty); |
| 3008 | show_exceptions_cmd (0, from_tty); |
| 3009 | show_task_pause_cmd (0, from_tty); |
| 3010 | |
| 3011 | if (inf->pause_sc == 0) |
| 3012 | show_thread_default_pause_cmd (0, from_tty); |
| 3013 | show_thread_default_run_cmd (0, from_tty); |
| 3014 | |
| 3015 | if (inf->task) |
| 3016 | { |
| 3017 | show_stopped_cmd (0, from_tty); |
| 3018 | show_sig_thread_cmd (0, from_tty); |
| 3019 | } |
| 3020 | |
| 3021 | if (inf->detach_sc != 0) |
| 3022 | show_task_detach_sc_cmd (0, from_tty); |
| 3023 | if (inf->default_thread_detach_sc != 0) |
| 3024 | show_thread_default_detach_sc_cmd (0, from_tty); |
| 3025 | } |
| 3026 | |
| 3027 | \f |
| 3028 | static void |
| 3029 | set_noninvasive_cmd (char *args, int from_tty) |
| 3030 | { |
| 3031 | /* Invert the sense of the arg for each component. */ |
| 3032 | char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on"; |
| 3033 | |
| 3034 | set_task_pause_cmd (inv_args, from_tty); |
| 3035 | set_signals_cmd (inv_args, from_tty); |
| 3036 | set_exceptions_cmd (inv_args, from_tty); |
| 3037 | } |
| 3038 | |
| 3039 | \f |
| 3040 | static void |
| 3041 | info_port_rights (char *args, mach_port_type_t only) |
| 3042 | { |
| 3043 | struct inf *inf = active_inf (); |
| 3044 | struct value *vmark = value_mark (); |
| 3045 | |
| 3046 | if (args) |
| 3047 | /* Explicit list of port rights. */ |
| 3048 | { |
| 3049 | while (*args) |
| 3050 | { |
| 3051 | struct value *val = parse_to_comma_and_eval (&args); |
| 3052 | long right = value_as_long (val); |
| 3053 | error_t err = |
| 3054 | print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS, |
| 3055 | stdout); |
| 3056 | if (err) |
| 3057 | error (_("%ld: %s."), right, safe_strerror (err)); |
| 3058 | } |
| 3059 | } |
| 3060 | else |
| 3061 | /* Print all of them. */ |
| 3062 | { |
| 3063 | error_t err = |
| 3064 | print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS, |
| 3065 | stdout); |
| 3066 | if (err) |
| 3067 | error (_("%s."), safe_strerror (err)); |
| 3068 | } |
| 3069 | |
| 3070 | value_free_to_mark (vmark); |
| 3071 | } |
| 3072 | |
| 3073 | static void |
| 3074 | info_send_rights_cmd (char *args, int from_tty) |
| 3075 | { |
| 3076 | info_port_rights (args, MACH_PORT_TYPE_SEND); |
| 3077 | } |
| 3078 | |
| 3079 | static void |
| 3080 | info_recv_rights_cmd (char *args, int from_tty) |
| 3081 | { |
| 3082 | info_port_rights (args, MACH_PORT_TYPE_RECEIVE); |
| 3083 | } |
| 3084 | |
| 3085 | static void |
| 3086 | info_port_sets_cmd (char *args, int from_tty) |
| 3087 | { |
| 3088 | info_port_rights (args, MACH_PORT_TYPE_PORT_SET); |
| 3089 | } |
| 3090 | |
| 3091 | static void |
| 3092 | info_dead_names_cmd (char *args, int from_tty) |
| 3093 | { |
| 3094 | info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME); |
| 3095 | } |
| 3096 | |
| 3097 | static void |
| 3098 | info_port_rights_cmd (char *args, int from_tty) |
| 3099 | { |
| 3100 | info_port_rights (args, ~0); |
| 3101 | } |
| 3102 | |
| 3103 | \f |
| 3104 | static void |
| 3105 | add_task_commands (void) |
| 3106 | { |
| 3107 | add_cmd ("pause", class_run, set_thread_default_pause_cmd, _("\ |
| 3108 | Set whether the new threads are suspended while gdb has control.\n\ |
| 3109 | This property normally has no effect because the whole task is\n\ |
| 3110 | suspended, however, that may be disabled with \"set task pause off\".\n\ |
| 3111 | The default value is \"off\"."), |
| 3112 | &set_thread_default_cmd_list); |
| 3113 | add_cmd ("pause", no_class, show_thread_default_pause_cmd, _("\ |
| 3114 | Show whether new threads are suspended while gdb has control."), |
| 3115 | &show_thread_default_cmd_list); |
| 3116 | |
| 3117 | add_cmd ("run", class_run, set_thread_default_run_cmd, _("\ |
| 3118 | Set whether new threads are allowed to run (once gdb has noticed them)."), |
| 3119 | &set_thread_default_cmd_list); |
| 3120 | add_cmd ("run", no_class, show_thread_default_run_cmd, _("\ |
| 3121 | Show whether new threads are allowed to run (once gdb has noticed them)."), |
| 3122 | &show_thread_default_cmd_list); |
| 3123 | |
| 3124 | add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd, |
| 3125 | _("Set the default detach-suspend-count value for new threads."), |
| 3126 | &set_thread_default_cmd_list); |
| 3127 | add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd, |
| 3128 | _("Show the default detach-suspend-count value for new threads."), |
| 3129 | &show_thread_default_cmd_list); |
| 3130 | |
| 3131 | add_cmd ("signals", class_run, set_signals_cmd, _("\ |
| 3132 | Set whether the inferior process's signals will be intercepted.\n\ |
| 3133 | Mach exceptions (such as breakpoint traps) are not affected."), |
| 3134 | &setlist); |
| 3135 | add_alias_cmd ("sigs", "signals", class_run, 1, &setlist); |
| 3136 | add_cmd ("signals", no_class, show_signals_cmd, _("\ |
| 3137 | Show whether the inferior process's signals will be intercepted."), |
| 3138 | &showlist); |
| 3139 | add_alias_cmd ("sigs", "signals", no_class, 1, &showlist); |
| 3140 | |
| 3141 | add_cmd ("signal-thread", class_run, set_sig_thread_cmd, _("\ |
| 3142 | Set the thread that gdb thinks is the libc signal thread.\n\ |
| 3143 | This thread is run when delivering a signal to a non-stopped process."), |
| 3144 | &setlist); |
| 3145 | add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist); |
| 3146 | add_cmd ("signal-thread", no_class, show_sig_thread_cmd, _("\ |
| 3147 | Set the thread that gdb thinks is the libc signal thread."), |
| 3148 | &showlist); |
| 3149 | add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist); |
| 3150 | |
| 3151 | add_cmd ("stopped", class_run, set_stopped_cmd, _("\ |
| 3152 | Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n\ |
| 3153 | Stopped process will be continued by sending them a signal."), |
| 3154 | &setlist); |
| 3155 | add_cmd ("stopped", no_class, show_signals_cmd, _("\ |
| 3156 | Show whether gdb thinks the inferior process is stopped as with SIGSTOP."), |
| 3157 | &showlist); |
| 3158 | |
| 3159 | add_cmd ("exceptions", class_run, set_exceptions_cmd, _("\ |
| 3160 | Set whether exceptions in the inferior process will be trapped.\n\ |
| 3161 | When exceptions are turned off, neither breakpoints nor single-stepping\n\ |
| 3162 | will work."), |
| 3163 | &setlist); |
| 3164 | /* Allow `set exc' despite conflict with `set exception-port'. */ |
| 3165 | add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist); |
| 3166 | add_cmd ("exceptions", no_class, show_exceptions_cmd, _("\ |
| 3167 | Show whether exceptions in the inferior process will be trapped."), |
| 3168 | &showlist); |
| 3169 | |
| 3170 | add_prefix_cmd ("task", no_class, set_task_cmd, |
| 3171 | _("Command prefix for setting task attributes."), |
| 3172 | &set_task_cmd_list, "set task ", 0, &setlist); |
| 3173 | add_prefix_cmd ("task", no_class, show_task_cmd, |
| 3174 | _("Command prefix for showing task attributes."), |
| 3175 | &show_task_cmd_list, "show task ", 0, &showlist); |
| 3176 | |
| 3177 | add_cmd ("pause", class_run, set_task_pause_cmd, _("\ |
| 3178 | Set whether the task is suspended while gdb has control.\n\ |
| 3179 | A value of \"on\" takes effect immediately, otherwise nothing happens\n\ |
| 3180 | until the next time the program is continued.\n\ |
| 3181 | When setting this to \"off\", \"set thread default pause on\" can be\n\ |
| 3182 | used to pause individual threads by default instead."), |
| 3183 | &set_task_cmd_list); |
| 3184 | add_cmd ("pause", no_class, show_task_pause_cmd, |
| 3185 | _("Show whether the task is suspended while gdb has control."), |
| 3186 | &show_task_cmd_list); |
| 3187 | |
| 3188 | add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd, |
| 3189 | _("Set the suspend count will leave on the thread when detaching."), |
| 3190 | &set_task_cmd_list); |
| 3191 | add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd, |
| 3192 | _("Show the suspend count will leave on the thread when detaching."), |
| 3193 | &show_task_cmd_list); |
| 3194 | |
| 3195 | add_cmd ("exception-port", no_class, set_task_exc_port_cmd, _("\ |
| 3196 | Set the task exception port to which we forward exceptions.\n\ |
| 3197 | The argument should be the value of the send right in the task."), |
| 3198 | &set_task_cmd_list); |
| 3199 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list); |
| 3200 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, |
| 3201 | &set_task_cmd_list); |
| 3202 | |
| 3203 | /* A convenient way of turning on all options require to noninvasively |
| 3204 | debug running tasks. */ |
| 3205 | add_cmd ("noninvasive", no_class, set_noninvasive_cmd, _("\ |
| 3206 | Set task options so that we interfere as little as possible.\n\ |
| 3207 | This is the same as setting `task pause', `exceptions', and\n\ |
| 3208 | `signals' to the opposite value."), |
| 3209 | &setlist); |
| 3210 | |
| 3211 | /* Commands to show information about the task's ports. */ |
| 3212 | add_cmd ("send-rights", class_info, info_send_rights_cmd, |
| 3213 | _("Show information about the task's send rights"), |
| 3214 | &infolist); |
| 3215 | add_cmd ("receive-rights", class_info, info_recv_rights_cmd, |
| 3216 | _("Show information about the task's receive rights"), |
| 3217 | &infolist); |
| 3218 | add_cmd ("port-rights", class_info, info_port_rights_cmd, |
| 3219 | _("Show information about the task's port rights"), |
| 3220 | &infolist); |
| 3221 | add_cmd ("port-sets", class_info, info_port_sets_cmd, |
| 3222 | _("Show information about the task's port sets"), |
| 3223 | &infolist); |
| 3224 | add_cmd ("dead-names", class_info, info_dead_names_cmd, |
| 3225 | _("Show information about the task's dead names"), |
| 3226 | &infolist); |
| 3227 | add_info_alias ("ports", "port-rights", 1); |
| 3228 | add_info_alias ("port", "port-rights", 1); |
| 3229 | add_info_alias ("psets", "port-sets", 1); |
| 3230 | } |
| 3231 | |
| 3232 | \f |
| 3233 | static void |
| 3234 | set_thread_pause_cmd (char *args, int from_tty) |
| 3235 | { |
| 3236 | struct proc *thread = cur_thread (); |
| 3237 | int old_sc = thread->pause_sc; |
| 3238 | thread->pause_sc = parse_bool_arg (args, "set thread pause"); |
| 3239 | if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0) |
| 3240 | /* If the task is currently unsuspended, immediately suspend it, |
| 3241 | otherwise wait until the next time it gets control. */ |
| 3242 | inf_suspend (thread->inf); |
| 3243 | } |
| 3244 | |
| 3245 | static void |
| 3246 | show_thread_pause_cmd (char *args, int from_tty) |
| 3247 | { |
| 3248 | struct proc *thread = cur_thread (); |
| 3249 | int sc = thread->pause_sc; |
| 3250 | check_empty (args, "show task pause"); |
| 3251 | printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n", |
| 3252 | proc_string (thread), |
| 3253 | sc ? "is" : "isn't", |
| 3254 | !sc && thread->inf->pause_sc ? " (but the task is)" : ""); |
| 3255 | } |
| 3256 | |
| 3257 | static void |
| 3258 | set_thread_run_cmd (char *args, int from_tty) |
| 3259 | { |
| 3260 | struct proc *thread = cur_thread (); |
| 3261 | thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1; |
| 3262 | } |
| 3263 | |
| 3264 | static void |
| 3265 | show_thread_run_cmd (char *args, int from_tty) |
| 3266 | { |
| 3267 | struct proc *thread = cur_thread (); |
| 3268 | check_empty (args, "show thread run"); |
| 3269 | printf_unfiltered ("Thread %s %s allowed to run.", |
| 3270 | proc_string (thread), |
| 3271 | thread->run_sc == 0 ? "is" : "isn't"); |
| 3272 | } |
| 3273 | |
| 3274 | static void |
| 3275 | set_thread_detach_sc_cmd (char *args, int from_tty) |
| 3276 | { |
| 3277 | cur_thread ()->detach_sc = parse_int_arg (args, |
| 3278 | "set thread detach-suspend-count"); |
| 3279 | } |
| 3280 | |
| 3281 | static void |
| 3282 | show_thread_detach_sc_cmd (char *args, int from_tty) |
| 3283 | { |
| 3284 | struct proc *thread = cur_thread (); |
| 3285 | check_empty (args, "show thread detach-suspend-count"); |
| 3286 | printf_unfiltered ("Thread %s will be left with a suspend count" |
| 3287 | " of %d when detaching.\n", |
| 3288 | proc_string (thread), |
| 3289 | thread->detach_sc); |
| 3290 | } |
| 3291 | |
| 3292 | static void |
| 3293 | set_thread_exc_port_cmd (char *args, int from_tty) |
| 3294 | { |
| 3295 | struct proc *thread = cur_thread (); |
| 3296 | if (!args) |
| 3297 | error (_("No argument to \"set thread exception-port\" command.")); |
| 3298 | steal_exc_port (thread, parse_and_eval_address (args)); |
| 3299 | } |
| 3300 | |
| 3301 | #if 0 |
| 3302 | static void |
| 3303 | show_thread_cmd (char *args, int from_tty) |
| 3304 | { |
| 3305 | struct proc *thread = cur_thread (); |
| 3306 | check_empty (args, "show thread"); |
| 3307 | show_thread_run_cmd (0, from_tty); |
| 3308 | show_thread_pause_cmd (0, from_tty); |
| 3309 | if (thread->detach_sc != 0) |
| 3310 | show_thread_detach_sc_cmd (0, from_tty); |
| 3311 | } |
| 3312 | #endif |
| 3313 | |
| 3314 | static void |
| 3315 | thread_takeover_sc_cmd (char *args, int from_tty) |
| 3316 | { |
| 3317 | struct proc *thread = cur_thread (); |
| 3318 | thread_basic_info_data_t _info; |
| 3319 | thread_basic_info_t info = &_info; |
| 3320 | mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT; |
| 3321 | error_t err = |
| 3322 | thread_info (thread->port, THREAD_BASIC_INFO, (int *) &info, &info_len); |
| 3323 | if (err) |
| 3324 | error (("%s."), safe_strerror (err)); |
| 3325 | thread->sc = info->suspend_count; |
| 3326 | if (from_tty) |
| 3327 | printf_unfiltered ("Suspend count was %d.\n", thread->sc); |
| 3328 | if (info != &_info) |
| 3329 | vm_deallocate (mach_task_self (), (vm_address_t) info, |
| 3330 | info_len * sizeof (int)); |
| 3331 | } |
| 3332 | |
| 3333 | \f |
| 3334 | static void |
| 3335 | add_thread_commands (void) |
| 3336 | { |
| 3337 | add_prefix_cmd ("thread", no_class, set_thread_cmd, |
| 3338 | _("Command prefix for setting thread properties."), |
| 3339 | &set_thread_cmd_list, "set thread ", 0, &setlist); |
| 3340 | add_prefix_cmd ("default", no_class, show_thread_cmd, |
| 3341 | _("Command prefix for setting default thread properties."), |
| 3342 | &set_thread_default_cmd_list, "set thread default ", 0, |
| 3343 | &set_thread_cmd_list); |
| 3344 | add_prefix_cmd ("thread", no_class, set_thread_default_cmd, |
| 3345 | _("Command prefix for showing thread properties."), |
| 3346 | &show_thread_cmd_list, "show thread ", 0, &showlist); |
| 3347 | add_prefix_cmd ("default", no_class, show_thread_default_cmd, |
| 3348 | _("Command prefix for showing default thread properties."), |
| 3349 | &show_thread_default_cmd_list, "show thread default ", 0, |
| 3350 | &show_thread_cmd_list); |
| 3351 | |
| 3352 | add_cmd ("pause", class_run, set_thread_pause_cmd, _("\ |
| 3353 | Set whether the current thread is suspended while gdb has control.\n\ |
| 3354 | A value of \"on\" takes effect immediately, otherwise nothing happens\n\ |
| 3355 | until the next time the program is continued. This property normally\n\ |
| 3356 | has no effect because the whole task is suspended, however, that may\n\ |
| 3357 | be disabled with \"set task pause off\".\n\ |
| 3358 | The default value is \"off\"."), |
| 3359 | &set_thread_cmd_list); |
| 3360 | add_cmd ("pause", no_class, show_thread_pause_cmd, _("\ |
| 3361 | Show whether the current thread is suspended while gdb has control."), |
| 3362 | &show_thread_cmd_list); |
| 3363 | |
| 3364 | add_cmd ("run", class_run, set_thread_run_cmd, |
| 3365 | _("Set whether the current thread is allowed to run."), |
| 3366 | &set_thread_cmd_list); |
| 3367 | add_cmd ("run", no_class, show_thread_run_cmd, |
| 3368 | _("Show whether the current thread is allowed to run."), |
| 3369 | &show_thread_cmd_list); |
| 3370 | |
| 3371 | add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd, _("\ |
| 3372 | Set the suspend count will leave on the thread when detaching.\n\ |
| 3373 | Note that this is relative to suspend count when gdb noticed the thread;\n\ |
| 3374 | use the `thread takeover-suspend-count' to force it to an absolute value."), |
| 3375 | &set_thread_cmd_list); |
| 3376 | add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd, _("\ |
| 3377 | Show the suspend count will leave on the thread when detaching.\n\ |
| 3378 | Note that this is relative to suspend count when gdb noticed the thread;\n\ |
| 3379 | use the `thread takeover-suspend-count' to force it to an absolute value."), |
| 3380 | &show_thread_cmd_list); |
| 3381 | |
| 3382 | add_cmd ("exception-port", no_class, set_thread_exc_port_cmd, _("\ |
| 3383 | Set the thread exception port to which we forward exceptions.\n\ |
| 3384 | This overrides the task exception port.\n\ |
| 3385 | The argument should be the value of the send right in the task."), |
| 3386 | &set_thread_cmd_list); |
| 3387 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list); |
| 3388 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, |
| 3389 | &set_thread_cmd_list); |
| 3390 | |
| 3391 | add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd, _("\ |
| 3392 | Force the threads absolute suspend-count to be gdb's.\n\ |
| 3393 | Prior to giving this command, gdb's thread suspend-counts are relative\n\ |
| 3394 | to the thread's initial suspend-count when gdb notices the threads."), |
| 3395 | &thread_cmd_list); |
| 3396 | } |
| 3397 | |
| 3398 | \f |
| 3399 | void |
| 3400 | _initialize_gnu_nat (void) |
| 3401 | { |
| 3402 | proc_server = getproc (); |
| 3403 | |
| 3404 | init_gnu_ops (); |
| 3405 | add_target (&gnu_ops); |
| 3406 | |
| 3407 | add_task_commands (); |
| 3408 | add_thread_commands (); |
| 3409 | deprecated_add_set_cmd ("gnu-debug", class_maintenance, |
| 3410 | var_boolean, (char *) &gnu_debug_flag, |
| 3411 | "Set debugging output for the gnu backend.", |
| 3412 | &maintenancelist); |
| 3413 | } |
| 3414 | \f |
| 3415 | #ifdef FLUSH_INFERIOR_CACHE |
| 3416 | |
| 3417 | /* When over-writing code on some machines the I-Cache must be flushed |
| 3418 | explicitly, because it is not kept coherent by the lazy hardware. |
| 3419 | This definitely includes breakpoints, for instance, or else we |
| 3420 | end up looping in mysterious Bpt traps */ |
| 3421 | |
| 3422 | void |
| 3423 | flush_inferior_icache (CORE_ADDR pc, int amount) |
| 3424 | { |
| 3425 | vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH; |
| 3426 | error_t ret; |
| 3427 | |
| 3428 | ret = vm_machine_attribute (gnu_current_inf->task->port, |
| 3429 | pc, |
| 3430 | amount, |
| 3431 | MATTR_CACHE, |
| 3432 | &flush); |
| 3433 | if (ret != KERN_SUCCESS) |
| 3434 | warning (_("Error flushing inferior's cache : %s"), safe_strerror (ret)); |
| 3435 | } |
| 3436 | #endif /* FLUSH_INFERIOR_CACHE */ |