| 1 | /* Interface GDB to the GNU Hurd |
| 2 | Copyright (C) 1992, 1995, 1996, 1997 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | Written by Miles Bader <miles@gnu.ai.mit.edu> |
| 7 | |
| 8 | Some code and ideas from m3-nat.c by Jukka Virtanen <jtv@hut.fi> |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 23 | */ |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <errno.h> |
| 27 | #include <signal.h> |
| 28 | #include <assert.h> |
| 29 | #include <setjmp.h> |
| 30 | #include <limits.h> |
| 31 | #include <sys/ptrace.h> |
| 32 | |
| 33 | /* We include this because we don't need the access macros and they conflict |
| 34 | with gdb's definitions (ick). This is very non standard! */ |
| 35 | #include <waitflags.h> |
| 36 | |
| 37 | #include <mach.h> |
| 38 | #include <mach/message.h> |
| 39 | #include <mach/notify.h> |
| 40 | #include <mach_error.h> |
| 41 | #include <mach/exception.h> |
| 42 | #include <mach/vm_attributes.h> |
| 43 | |
| 44 | #include <hurd/process.h> |
| 45 | #include <hurd/process_request.h> |
| 46 | #include <hurd/msg.h> |
| 47 | #include <hurd/msg_request.h> |
| 48 | #include <hurd/signal.h> |
| 49 | #include <hurd/interrupt.h> |
| 50 | #include <hurd/sigpreempt.h> |
| 51 | |
| 52 | #include <portinfo.h> |
| 53 | |
| 54 | #include "defs.h" |
| 55 | #include "inferior.h" |
| 56 | #include "symtab.h" |
| 57 | #include "value.h" |
| 58 | #include "language.h" |
| 59 | #include "target.h" |
| 60 | #include "wait.h" |
| 61 | #include "gdbcmd.h" |
| 62 | #include "gdbcore.h" |
| 63 | |
| 64 | #include "gnu-nat.h" |
| 65 | |
| 66 | #include "exc_request_S.h" |
| 67 | #include "notify_S.h" |
| 68 | #include "process_reply_S.h" |
| 69 | #include "msg_reply_S.h" |
| 70 | |
| 71 | #include "exc_request_U.h" |
| 72 | #include "msg_U.h" |
| 73 | |
| 74 | static process_t proc_server = MACH_PORT_NULL; |
| 75 | |
| 76 | /* If we've sent a proc_wait_request to the proc server, the pid of the |
| 77 | process we asked about. We can only ever have one outstanding. */ |
| 78 | int proc_wait_pid = 0; |
| 79 | |
| 80 | /* The number of wait requests we've sent, and expect replies from. */ |
| 81 | int proc_waits_pending = 0; |
| 82 | |
| 83 | int gnu_debug_flag = 0; |
| 84 | |
| 85 | /* Forward decls */ |
| 86 | |
| 87 | extern struct target_ops gnu_ops; |
| 88 | extern char *strerror(); |
| 89 | |
| 90 | int inf_update_procs (struct inf *inf); |
| 91 | struct inf *make_inf (); |
| 92 | void inf_clear_wait (struct inf *inf); |
| 93 | void inf_cleanup (struct inf *inf); |
| 94 | void inf_startup (struct inf *inf, int pid); |
| 95 | int inf_update_suspends (struct inf *inf); |
| 96 | void inf_set_pid (struct inf *inf, pid_t pid); |
| 97 | void inf_validate_procs (struct inf *inf); |
| 98 | void inf_steal_exc_ports (struct inf *inf); |
| 99 | void inf_restore_exc_ports (struct inf *inf); |
| 100 | struct proc *inf_tid_to_proc (struct inf *inf, int tid); |
| 101 | inline void inf_set_threads_resume_sc (struct inf *inf, |
| 102 | struct proc *run_thread, |
| 103 | int run_others); |
| 104 | inline int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf); |
| 105 | inline void inf_suspend (struct inf *inf); |
| 106 | inline void inf_resume (struct inf *inf); |
| 107 | void inf_set_step_thread (struct inf *inf, struct proc *proc); |
| 108 | void inf_detach (struct inf *inf); |
| 109 | void inf_attach (struct inf *inf, int pid); |
| 110 | void inf_signal (struct inf *inf, enum target_signal sig); |
| 111 | |
| 112 | #define inf_debug(_inf, msg, args...) \ |
| 113 | do { struct inf *__inf = (_inf); \ |
| 114 | debug ("{inf %d %p}: " msg, __inf->pid, __inf , ##args); } while (0) |
| 115 | |
| 116 | void proc_abort (struct proc *proc, int force); |
| 117 | thread_state_t proc_get_state (struct proc *proc, int force); |
| 118 | struct proc *make_proc (struct inf *inf, mach_port_t port, int tid); |
| 119 | struct proc *_proc_free (struct proc *proc); |
| 120 | int proc_update_sc (struct proc *proc); |
| 121 | error_t proc_get_exception_port (struct proc *proc, mach_port_t *port); |
| 122 | error_t proc_set_exception_port (struct proc *proc, mach_port_t port); |
| 123 | static mach_port_t _proc_get_exc_port (struct proc *proc); |
| 124 | void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port); |
| 125 | void proc_restore_exc_port (struct proc *proc); |
| 126 | int proc_trace (struct proc *proc, int set); |
| 127 | char *proc_string (struct proc *proc); |
| 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 | #define MIG_SERVER_DIED EMIG_SERVER_DIED /* XXX */ |
| 150 | \f |
| 151 | /* The state passed by an exception message. */ |
| 152 | struct exc_state |
| 153 | { |
| 154 | int exception; /* The exception code */ |
| 155 | int code, subcode; |
| 156 | mach_port_t handler; /* The real exception port to handle this. */ |
| 157 | mach_port_t reply; /* The reply port from the exception call. */ |
| 158 | }; |
| 159 | |
| 160 | /* The results of the last wait an inf did. */ |
| 161 | struct inf_wait |
| 162 | { |
| 163 | struct target_waitstatus status; /* The status returned to gdb. */ |
| 164 | struct exc_state exc; /* The exception that caused us to return. */ |
| 165 | struct proc *thread; /* The thread in question. */ |
| 166 | int suppress; /* Something trivial happened. */ |
| 167 | }; |
| 168 | |
| 169 | /* The state of an inferior. */ |
| 170 | struct inf |
| 171 | { |
| 172 | /* Fields describing the current inferior. */ |
| 173 | |
| 174 | struct proc *task; /* The mach task. */ |
| 175 | struct proc *threads; /* A linked list of all threads in TASK. */ |
| 176 | |
| 177 | /* True if THREADS needn't be validated by querying the task. We assume that |
| 178 | we and the task in question are the only ones frobbing the thread list, |
| 179 | so as long as we don't let any code run, we don't have to worry about |
| 180 | THREADS changing. */ |
| 181 | int threads_up_to_date; |
| 182 | |
| 183 | pid_t pid; /* The real system PID. */ |
| 184 | |
| 185 | struct inf_wait wait; /* What to return from target_wait. */ |
| 186 | |
| 187 | /* One thread proc in INF may be in `single-stepping mode'. This is it. */ |
| 188 | struct proc *step_thread; |
| 189 | |
| 190 | /* The thread we think is the signal thread. */ |
| 191 | struct proc *signal_thread; |
| 192 | |
| 193 | mach_port_t event_port; /* Where we receive various msgs. */ |
| 194 | |
| 195 | /* True if we think at least one thread in the inferior could currently be |
| 196 | running. */ |
| 197 | int running : 1; |
| 198 | |
| 199 | /* True if the process has stopped (in the proc server sense). Note that |
| 200 | since a proc server `stop' leaves the signal thread running, the inf can |
| 201 | be RUNNING && STOPPED... */ |
| 202 | int stopped : 1; |
| 203 | |
| 204 | /* True if the inferior is traced. */ |
| 205 | int traced : 1; |
| 206 | |
| 207 | /* True if we shouldn't try waiting for the inferior, usually because we |
| 208 | can't for some reason. */ |
| 209 | int no_wait : 1; |
| 210 | |
| 211 | /* When starting a new inferior, we don't try to validate threads until all |
| 212 | the proper execs have been done. This is a count of how many execs we |
| 213 | expect to happen. */ |
| 214 | unsigned pending_execs; |
| 215 | |
| 216 | /* Fields describing global state */ |
| 217 | |
| 218 | /* The task suspend count used when gdb has control. This is normally 1 to |
| 219 | make things easier for us, but sometimes (like when attaching to vital |
| 220 | system servers) it may be desirable to let the task continue to run |
| 221 | (pausing individual threads as necessary). */ |
| 222 | int pause_sc; |
| 223 | |
| 224 | /* The task suspend count left when detaching from a task. */ |
| 225 | int detach_sc; |
| 226 | |
| 227 | /* The initial values used for the run_sc and pause_sc of newly discovered |
| 228 | threads -- see the definition of those fields in struct proc. */ |
| 229 | int default_thread_run_sc; |
| 230 | int default_thread_pause_sc; |
| 231 | int default_thread_detach_sc; |
| 232 | |
| 233 | /* True if the process should be traced when started/attached. Newly |
| 234 | started processes *must* be traced at first to exec them properly, but |
| 235 | if this is false, tracing is turned off as soon it has done so. */ |
| 236 | int want_signals; |
| 237 | |
| 238 | /* True if exceptions from the inferior process should be trapped. This |
| 239 | must be on to use breakpoints. */ |
| 240 | int want_exceptions; |
| 241 | }; |
| 242 | |
| 243 | |
| 244 | int __proc_pid (struct proc *proc) |
| 245 | { |
| 246 | return proc->inf->pid; |
| 247 | } |
| 248 | \f |
| 249 | /* Update PROC's real suspend count to match it's desired one. Returns true |
| 250 | if we think PROC is now in a runnable state. */ |
| 251 | int |
| 252 | proc_update_sc (struct proc *proc) |
| 253 | { |
| 254 | int running; |
| 255 | int err = 0; |
| 256 | int delta = proc->sc - proc->cur_sc; |
| 257 | |
| 258 | if (delta) |
| 259 | proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc); |
| 260 | |
| 261 | if (proc->sc == 0 && proc->state_changed) |
| 262 | /* Since PROC may start running, we must write back any state changes. */ |
| 263 | { |
| 264 | assert (proc_is_thread (proc)); |
| 265 | proc_debug (proc, "storing back changed thread state"); |
| 266 | err = thread_set_state (proc->port, THREAD_STATE_FLAVOR, |
| 267 | (thread_state_t)&proc->state, THREAD_STATE_SIZE); |
| 268 | if (! err) |
| 269 | proc->state_changed = 0; |
| 270 | } |
| 271 | |
| 272 | if (delta > 0) |
| 273 | while (delta-- > 0 && !err) |
| 274 | if (proc_is_task (proc)) |
| 275 | err = task_suspend (proc->port); |
| 276 | else |
| 277 | err = thread_suspend (proc->port); |
| 278 | else |
| 279 | while (delta++ < 0 && !err) |
| 280 | if (proc_is_task (proc)) |
| 281 | err = task_resume (proc->port); |
| 282 | else |
| 283 | err = thread_resume (proc->port); |
| 284 | |
| 285 | if (! err) |
| 286 | proc->cur_sc = proc->sc; |
| 287 | |
| 288 | /* If we got an error, then the task/thread has disappeared. */ |
| 289 | running = !err && proc->sc == 0; |
| 290 | |
| 291 | proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended"); |
| 292 | if (err) |
| 293 | proc_debug (proc, "err = %s", strerror (err)); |
| 294 | |
| 295 | if (running) |
| 296 | { |
| 297 | proc->aborted = 0; |
| 298 | proc->state_valid = proc->state_changed = 0; |
| 299 | proc->fetched_regs = 0; |
| 300 | } |
| 301 | |
| 302 | return running; |
| 303 | } |
| 304 | \f |
| 305 | /* Thread_abort is called on PROC if needed. PROC must be a thread proc. |
| 306 | If PROC is deemed `precious', then nothing is done unless FORCE is true. |
| 307 | In particular, a thread is precious if it's running (in which case forcing |
| 308 | it includes suspending it first), or if it has an exception pending. */ |
| 309 | void |
| 310 | proc_abort (struct proc *proc, int force) |
| 311 | { |
| 312 | assert (proc_is_thread (proc)); |
| 313 | |
| 314 | if (! proc->aborted) |
| 315 | { |
| 316 | struct inf *inf = proc->inf; |
| 317 | int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0); |
| 318 | |
| 319 | if (running && force) |
| 320 | { |
| 321 | proc->sc = 1; |
| 322 | inf_update_suspends (proc->inf); |
| 323 | running = 0; |
| 324 | warning ("Stopped %s.", proc_string (proc)); |
| 325 | } |
| 326 | else if (proc == inf->wait.thread && inf->wait.exc.reply && !force) |
| 327 | /* An exception is pending on PROC, which don't mess with. */ |
| 328 | running = 1; |
| 329 | |
| 330 | if (! running) |
| 331 | /* We only abort the thread if it's not actually running. */ |
| 332 | { |
| 333 | thread_abort (proc->port); |
| 334 | proc_debug (proc, "aborted"); |
| 335 | proc->aborted = 1; |
| 336 | } |
| 337 | else |
| 338 | proc_debug (proc, "not aborting"); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | /* Make sure that the state field in PROC is up to date, and return a pointer |
| 343 | to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure |
| 344 | that the thread is stopped and aborted first, and sets the state_changed |
| 345 | field in PROC to true. */ |
| 346 | thread_state_t |
| 347 | proc_get_state (struct proc *proc, int will_modify) |
| 348 | { |
| 349 | int was_aborted = proc->aborted; |
| 350 | |
| 351 | proc_debug (proc, "updating state info%s", |
| 352 | will_modify ? " (with intention to modify)" : ""); |
| 353 | |
| 354 | proc_abort (proc, will_modify); |
| 355 | |
| 356 | if (! was_aborted && proc->aborted) |
| 357 | /* PROC's state may have changed since we last fetched it. */ |
| 358 | proc->state_valid = 0; |
| 359 | |
| 360 | if (! proc->state_valid) |
| 361 | { |
| 362 | mach_msg_type_number_t state_size = THREAD_STATE_SIZE; |
| 363 | error_t err = |
| 364 | thread_get_state (proc->port, THREAD_STATE_FLAVOR, |
| 365 | (thread_state_t)&proc->state, &state_size); |
| 366 | proc_debug (proc, "getting thread state"); |
| 367 | proc->state_valid = !err; |
| 368 | } |
| 369 | |
| 370 | if (proc->state_valid) |
| 371 | { |
| 372 | if (will_modify) |
| 373 | proc->state_changed = 1; |
| 374 | return (thread_state_t)&proc->state; |
| 375 | } |
| 376 | else |
| 377 | return 0; |
| 378 | } |
| 379 | \f |
| 380 | /* Set PORT to PROC's exception port. */ |
| 381 | error_t |
| 382 | proc_get_exception_port (struct proc *proc, mach_port_t *port) |
| 383 | { |
| 384 | if (proc_is_task (proc)) |
| 385 | return task_get_exception_port (proc->port, port); |
| 386 | else |
| 387 | return thread_get_exception_port (proc->port, port); |
| 388 | } |
| 389 | |
| 390 | /* Set PROC's exception port to PORT. */ |
| 391 | error_t |
| 392 | proc_set_exception_port (struct proc *proc, mach_port_t port) |
| 393 | { |
| 394 | proc_debug (proc, "setting exception port: %d", port); |
| 395 | if (proc_is_task (proc)) |
| 396 | return task_set_exception_port (proc->port, port); |
| 397 | else |
| 398 | return thread_set_exception_port (proc->port, port); |
| 399 | } |
| 400 | |
| 401 | /* Get PROC's exception port, cleaning up a bit if proc has died. */ |
| 402 | static mach_port_t |
| 403 | _proc_get_exc_port (struct proc *proc) |
| 404 | { |
| 405 | mach_port_t exc_port; |
| 406 | error_t err = proc_get_exception_port (proc, &exc_port); |
| 407 | |
| 408 | if (err) |
| 409 | /* PROC must be dead. */ |
| 410 | { |
| 411 | if (proc->exc_port) |
| 412 | mach_port_deallocate (mach_task_self (), proc->exc_port); |
| 413 | proc->exc_port = MACH_PORT_NULL; |
| 414 | if (proc->saved_exc_port) |
| 415 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| 416 | proc->saved_exc_port = MACH_PORT_NULL; |
| 417 | } |
| 418 | |
| 419 | return exc_port; |
| 420 | } |
| 421 | |
| 422 | /* Replace PROC's exception port with EXC_PORT, unless it's already been |
| 423 | done. Stash away any existing exception port so we can restore it later. */ |
| 424 | void |
| 425 | proc_steal_exc_port (struct proc *proc, mach_port_t exc_port) |
| 426 | { |
| 427 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); |
| 428 | |
| 429 | if (cur_exc_port) |
| 430 | { |
| 431 | error_t err; |
| 432 | |
| 433 | proc_debug (proc, "inserting exception port: %d", exc_port); |
| 434 | |
| 435 | if (cur_exc_port != exc_port) |
| 436 | /* Put in our exception port. */ |
| 437 | err = proc_set_exception_port (proc, exc_port); |
| 438 | |
| 439 | if (err || cur_exc_port == proc->exc_port) |
| 440 | /* We previously set the exception port, and it's still set. So we |
| 441 | just keep the old saved port which is what the proc set. */ |
| 442 | { |
| 443 | if (cur_exc_port) |
| 444 | mach_port_deallocate (mach_task_self (), cur_exc_port); |
| 445 | } |
| 446 | else |
| 447 | /* Keep a copy of PROC's old exception port so it can be restored. */ |
| 448 | { |
| 449 | if (proc->saved_exc_port) |
| 450 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| 451 | proc->saved_exc_port = cur_exc_port; |
| 452 | } |
| 453 | |
| 454 | proc_debug (proc, "saved exception port: %d", proc->saved_exc_port); |
| 455 | |
| 456 | if (!err) |
| 457 | proc->exc_port = exc_port; |
| 458 | else |
| 459 | warning ("Error setting exception port for %s: %s", |
| 460 | proc_string (proc), strerror (err)); |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | /* If we previously replaced PROC's exception port, put back what we |
| 465 | found there at the time, unless *our* exception port has since been |
| 466 | overwritten, in which case who knows what's going on. */ |
| 467 | void |
| 468 | proc_restore_exc_port (struct proc *proc) |
| 469 | { |
| 470 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); |
| 471 | |
| 472 | if (cur_exc_port) |
| 473 | { |
| 474 | error_t err = 0; |
| 475 | |
| 476 | proc_debug (proc, "restoring real exception port"); |
| 477 | |
| 478 | if (proc->exc_port == cur_exc_port) |
| 479 | /* Our's is still there. */ |
| 480 | err = proc_set_exception_port (proc, proc->saved_exc_port); |
| 481 | |
| 482 | if (proc->saved_exc_port) |
| 483 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| 484 | proc->saved_exc_port = MACH_PORT_NULL; |
| 485 | |
| 486 | if (!err) |
| 487 | proc->exc_port = MACH_PORT_NULL; |
| 488 | else |
| 489 | warning ("Error setting exception port for %s: %s", |
| 490 | proc_string (proc), strerror (err)); |
| 491 | } |
| 492 | } |
| 493 | \f |
| 494 | /* Turns hardware tracing in PROC on or off when SET is true or false, |
| 495 | respectively. Returns true on success. */ |
| 496 | int |
| 497 | proc_trace (struct proc *proc, int set) |
| 498 | { |
| 499 | thread_state_t state = proc_get_state (proc, 1); |
| 500 | |
| 501 | if (! state) |
| 502 | return 0; /* the thread must be dead. */ |
| 503 | |
| 504 | proc_debug (proc, "tracing %s", set ? "on" : "off"); |
| 505 | |
| 506 | if (set) |
| 507 | { |
| 508 | /* XXX We don't get the exception unless the thread has its own |
| 509 | exception port???? */ |
| 510 | if (proc->exc_port == MACH_PORT_NULL) |
| 511 | proc_steal_exc_port (proc, proc->inf->event_port); |
| 512 | THREAD_STATE_SET_TRACED (state); |
| 513 | } |
| 514 | else |
| 515 | THREAD_STATE_CLEAR_TRACED (state); |
| 516 | |
| 517 | return 1; |
| 518 | } |
| 519 | \f |
| 520 | /* A variable from which to assign new TIDs. */ |
| 521 | static int next_thread_id = 1; |
| 522 | |
| 523 | /* Returns a new proc structure with the given fields. Also adds a |
| 524 | notification for PORT becoming dead to be sent to INF's notify port. */ |
| 525 | struct proc * |
| 526 | make_proc (struct inf *inf, mach_port_t port, int tid) |
| 527 | { |
| 528 | error_t err; |
| 529 | mach_port_t prev_port = MACH_PORT_NULL; |
| 530 | struct proc *proc = malloc (sizeof (struct proc)); |
| 531 | |
| 532 | proc->port = port; |
| 533 | proc->tid = tid; |
| 534 | proc->inf = inf; |
| 535 | proc->next = 0; |
| 536 | proc->saved_exc_port = MACH_PORT_NULL; |
| 537 | proc->exc_port = MACH_PORT_NULL; |
| 538 | |
| 539 | proc->sc = 0; |
| 540 | proc->cur_sc = 0; |
| 541 | |
| 542 | /* Note that these are all the values for threads; the task simply uses the |
| 543 | corresponding field in INF directly. */ |
| 544 | proc->run_sc = inf->default_thread_run_sc; |
| 545 | proc->pause_sc = inf->default_thread_pause_sc; |
| 546 | proc->detach_sc = inf->default_thread_detach_sc; |
| 547 | proc->resume_sc = proc->run_sc; |
| 548 | |
| 549 | proc->aborted = 0; |
| 550 | proc->dead = 0; |
| 551 | proc->state_valid = 0; |
| 552 | proc->state_changed = 0; |
| 553 | |
| 554 | proc_debug (proc, "is new"); |
| 555 | |
| 556 | /* Get notified when things die. */ |
| 557 | err = |
| 558 | mach_port_request_notification (mach_task_self(), port, |
| 559 | MACH_NOTIFY_DEAD_NAME, 1, |
| 560 | inf->event_port, |
| 561 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
| 562 | &prev_port); |
| 563 | if (err) |
| 564 | warning ("Couldn't request notification for port %d: %s", |
| 565 | port, strerror (err)); |
| 566 | else |
| 567 | { |
| 568 | proc_debug (proc, "notifications to: %d", inf->event_port); |
| 569 | if (prev_port != MACH_PORT_NULL) |
| 570 | mach_port_deallocate (mach_task_self (), prev_port); |
| 571 | } |
| 572 | |
| 573 | if (inf->want_exceptions) |
| 574 | if (proc_is_task (proc)) |
| 575 | /* Make the task exception port point to us. */ |
| 576 | proc_steal_exc_port (proc, inf->event_port); |
| 577 | else |
| 578 | /* Just clear thread exception ports -- they default to the task one. */ |
| 579 | proc_steal_exc_port (proc, MACH_PORT_NULL); |
| 580 | |
| 581 | return proc; |
| 582 | } |
| 583 | |
| 584 | /* Frees PROC and any resources it uses, and returns the value of PROC's |
| 585 | next field. */ |
| 586 | struct proc * |
| 587 | _proc_free (struct proc *proc) |
| 588 | { |
| 589 | struct inf *inf = proc->inf; |
| 590 | struct proc *next = proc->next; |
| 591 | |
| 592 | proc_debug (proc, "freeing..."); |
| 593 | |
| 594 | if (proc == inf->step_thread) |
| 595 | /* Turn off single stepping. */ |
| 596 | inf_set_step_thread (inf, 0); |
| 597 | if (proc == inf->wait.thread) |
| 598 | inf_clear_wait (inf); |
| 599 | if (proc == inf->signal_thread) |
| 600 | inf->signal_thread = 0; |
| 601 | |
| 602 | if (proc->port != MACH_PORT_NULL) |
| 603 | { |
| 604 | if (proc->exc_port != MACH_PORT_NULL) |
| 605 | /* Restore the original exception port. */ |
| 606 | proc_restore_exc_port (proc); |
| 607 | if (proc->cur_sc != 0) |
| 608 | /* Resume the thread/task. */ |
| 609 | { |
| 610 | proc->sc = 0; |
| 611 | proc_update_sc (proc); |
| 612 | } |
| 613 | mach_port_deallocate (mach_task_self (), proc->port); |
| 614 | } |
| 615 | |
| 616 | free (proc); |
| 617 | return next; |
| 618 | } |
| 619 | \f |
| 620 | struct inf *make_inf () |
| 621 | { |
| 622 | struct inf *inf = malloc (sizeof (struct inf)); |
| 623 | |
| 624 | if (!inf) |
| 625 | return 0; |
| 626 | |
| 627 | inf->task = 0; |
| 628 | inf->threads = 0; |
| 629 | inf->threads_up_to_date = 0; |
| 630 | inf->pid = 0; |
| 631 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; |
| 632 | inf->wait.thread = 0; |
| 633 | inf->wait.exc.handler = MACH_PORT_NULL; |
| 634 | inf->wait.exc.reply = MACH_PORT_NULL; |
| 635 | inf->step_thread = 0; |
| 636 | inf->signal_thread = 0; |
| 637 | inf->event_port = MACH_PORT_NULL; |
| 638 | inf->stopped = 0; |
| 639 | inf->running = 0; |
| 640 | inf->traced = 0; |
| 641 | inf->no_wait = 0; |
| 642 | inf->pending_execs = 0; |
| 643 | inf->pause_sc = 1; |
| 644 | inf->detach_sc = 0; |
| 645 | inf->default_thread_run_sc = 0; |
| 646 | inf->default_thread_pause_sc = 0; |
| 647 | inf->default_thread_detach_sc = 0; |
| 648 | inf->want_signals = 1; /* By default */ |
| 649 | inf->want_exceptions = 1; /* By default */ |
| 650 | |
| 651 | return inf; |
| 652 | } |
| 653 | |
| 654 | /* clear INF's target wait status. */ |
| 655 | void |
| 656 | inf_clear_wait (struct inf *inf) |
| 657 | { |
| 658 | inf_debug (inf, "clearing wait"); |
| 659 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; |
| 660 | inf->wait.thread = 0; |
| 661 | inf->wait.suppress = 0; |
| 662 | if (inf->wait.exc.handler != MACH_PORT_NULL) |
| 663 | { |
| 664 | mach_port_deallocate (mach_task_self (), inf->wait.exc.handler); |
| 665 | inf->wait.exc.handler = MACH_PORT_NULL; |
| 666 | } |
| 667 | if (inf->wait.exc.reply != MACH_PORT_NULL) |
| 668 | { |
| 669 | mach_port_deallocate (mach_task_self (), inf->wait.exc.reply); |
| 670 | inf->wait.exc.reply = MACH_PORT_NULL; |
| 671 | } |
| 672 | } |
| 673 | \f |
| 674 | void |
| 675 | inf_cleanup (struct inf *inf) |
| 676 | { |
| 677 | inf_debug (inf, "cleanup"); |
| 678 | |
| 679 | inf_clear_wait (inf); |
| 680 | |
| 681 | inf_set_pid (inf, -1); |
| 682 | inf->pid = 0; |
| 683 | inf->traced = 0; |
| 684 | inf->no_wait = 0; |
| 685 | inf->stopped = 0; |
| 686 | inf->running = 0; |
| 687 | inf->pending_execs = 0; |
| 688 | |
| 689 | if (inf->event_port) |
| 690 | { |
| 691 | mach_port_destroy (mach_task_self (), inf->event_port); |
| 692 | inf->event_port = MACH_PORT_NULL; |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | void |
| 697 | inf_startup (struct inf *inf, int pid) |
| 698 | { |
| 699 | error_t err; |
| 700 | |
| 701 | inf_debug (inf, "startup: pid = %d", pid); |
| 702 | |
| 703 | inf_cleanup (inf); |
| 704 | |
| 705 | /* Make the port on which we receive all events. */ |
| 706 | err = mach_port_allocate (mach_task_self (), |
| 707 | MACH_PORT_RIGHT_RECEIVE, &inf->event_port); |
| 708 | if (err) |
| 709 | error ("Error allocating event port: %s", strerror (err)); |
| 710 | |
| 711 | /* Make a send right for it, so we can easily copy it for other people. */ |
| 712 | mach_port_insert_right (mach_task_self (), inf->event_port, |
| 713 | inf->event_port, MACH_MSG_TYPE_MAKE_SEND); |
| 714 | inf_set_pid (inf, pid); |
| 715 | } |
| 716 | \f |
| 717 | /* close current process, if any, and attach INF to process PORT */ |
| 718 | void |
| 719 | inf_set_pid (struct inf *inf, pid_t pid) |
| 720 | { |
| 721 | task_t task_port; |
| 722 | struct proc *task = inf->task; |
| 723 | |
| 724 | inf_debug (inf, "setting pid: %d", pid); |
| 725 | |
| 726 | if (pid < 0) |
| 727 | task_port = MACH_PORT_NULL; |
| 728 | else |
| 729 | { |
| 730 | error_t err = proc_pid2task (proc_server, pid, &task_port); |
| 731 | if (err) |
| 732 | error ("Error getting task for pid %d: %s", pid, strerror (err)); |
| 733 | } |
| 734 | |
| 735 | inf_debug (inf, "setting task: %d", task_port); |
| 736 | |
| 737 | if (inf->pause_sc) |
| 738 | task_suspend (task_port); |
| 739 | |
| 740 | if (task && task->port != task_port) |
| 741 | { |
| 742 | inf->task = 0; |
| 743 | inf_validate_procs (inf); /* Trash all the threads. */ |
| 744 | _proc_free (task); /* And the task. */ |
| 745 | } |
| 746 | |
| 747 | if (task_port != MACH_PORT_NULL) |
| 748 | { |
| 749 | inf->task = make_proc (inf, task_port, PROC_TID_TASK); |
| 750 | inf->threads_up_to_date = 0; |
| 751 | } |
| 752 | |
| 753 | if (inf->task) |
| 754 | { |
| 755 | inf->pid = pid; |
| 756 | if (inf->pause_sc) |
| 757 | inf->task->sc = inf->task->cur_sc = 1; /* Reflect task_suspend above */ |
| 758 | } |
| 759 | else |
| 760 | inf->pid = -1; |
| 761 | } |
| 762 | \f |
| 763 | /* Validates INF's stopped field from the actual proc server state. */ |
| 764 | static void |
| 765 | inf_validate_stopped (struct inf *inf) |
| 766 | { |
| 767 | char *noise; |
| 768 | mach_msg_type_number_t noise_len = 0; |
| 769 | struct procinfo *pi; |
| 770 | mach_msg_type_number_t pi_len = 0; |
| 771 | int info_flags = 0; |
| 772 | error_t err = |
| 773 | proc_getprocinfo (proc_server, inf->pid, &info_flags, |
| 774 | (procinfo_t *)&pi, &pi_len, &noise, &noise_len); |
| 775 | |
| 776 | if (! err) |
| 777 | { |
| 778 | inf->stopped = !!(pi->state & PI_STOPPED); |
| 779 | vm_deallocate (mach_task_self (), (vm_address_t)pi, pi_len); |
| 780 | if (noise_len > 0) |
| 781 | vm_deallocate (mach_task_self (), (vm_address_t)noise, noise_len); |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | /* Validates INF's task suspend count. If it's higher than we expect, verify |
| 786 | with the user before `stealing' the extra count. */ |
| 787 | static void |
| 788 | inf_validate_task_sc (struct inf *inf) |
| 789 | { |
| 790 | struct task_basic_info info; |
| 791 | mach_msg_type_number_t info_len = TASK_BASIC_INFO_COUNT; |
| 792 | error_t err = |
| 793 | task_info (inf->task->port, TASK_BASIC_INFO, (task_info_t)&info, &info_len); |
| 794 | |
| 795 | if (err) |
| 796 | inf->task->dead = 1; /* oh well */ |
| 797 | else if (inf->task->cur_sc < info.suspend_count) |
| 798 | { |
| 799 | int abort; |
| 800 | |
| 801 | target_terminal_ours (); /* Allow I/O. */ |
| 802 | abort = |
| 803 | !query ("Pid %d has an additional task suspend count of %d; clear it? ", |
| 804 | inf->pid, info.suspend_count - inf->task->cur_sc); |
| 805 | target_terminal_inferior (); /* Give it back to the child. */ |
| 806 | |
| 807 | if (abort) |
| 808 | error ("Additional task suspend count left untouched."); |
| 809 | |
| 810 | inf->task->cur_sc = info.suspend_count; |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | /* Turns tracing for INF on or off, depending on ON, unless it already is. |
| 815 | If INF is running, the resume_sc count of INF's threads will be modified, |
| 816 | and the signal thread will briefly be run to change the trace state. */ |
| 817 | void |
| 818 | inf_set_traced (struct inf *inf, int on) |
| 819 | { |
| 820 | if (on != inf->traced) |
| 821 | if (inf->task && !inf->task->dead) |
| 822 | /* Make it take effect immediately. */ |
| 823 | { |
| 824 | sigset_t mask = on ? ~(sigset_t)0 : 0; |
| 825 | error_t err = |
| 826 | INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport, |
| 827 | INIT_TRACEMASK, mask)); |
| 828 | if (err == EIEIO) |
| 829 | { |
| 830 | if (on) |
| 831 | warning ("Can't modify tracing state for pid %d: No signal thread", |
| 832 | inf->pid); |
| 833 | inf->traced = on; |
| 834 | } |
| 835 | else if (err) |
| 836 | warning ("Can't modify tracing state for pid %d: %s", |
| 837 | inf->pid, strerror (err)); |
| 838 | else |
| 839 | inf->traced = on; |
| 840 | } |
| 841 | else |
| 842 | inf->traced = on; |
| 843 | } |
| 844 | \f |
| 845 | /* Makes all the real suspend count deltas of all the procs in INF match the |
| 846 | desired values. Careful to always do thread/task suspend counts in the |
| 847 | safe order. Returns true if at least one thread is thought to be running.*/ |
| 848 | int |
| 849 | inf_update_suspends (struct inf *inf) |
| 850 | { |
| 851 | struct proc *task = inf->task; |
| 852 | /* We don't have to update INF->threads even though we're iterating over it |
| 853 | because we'll change a thread only if it already has an existing proc |
| 854 | entry. */ |
| 855 | |
| 856 | inf_debug (inf, "updating suspend counts"); |
| 857 | |
| 858 | if (task) |
| 859 | { |
| 860 | struct proc *thread; |
| 861 | int task_running = (task->sc == 0), thread_running = 0; |
| 862 | |
| 863 | if (task->sc > task->cur_sc) |
| 864 | /* The task is becoming _more_ suspended; do before any threads. */ |
| 865 | task_running = proc_update_sc (task); |
| 866 | |
| 867 | if (inf->pending_execs) |
| 868 | /* When we're waiting for an exec, things may be happening behind our |
| 869 | back, so be conservative. */ |
| 870 | thread_running = 1; |
| 871 | |
| 872 | /* Do all the thread suspend counts. */ |
| 873 | for (thread = inf->threads; thread; thread = thread->next) |
| 874 | thread_running |= proc_update_sc (thread); |
| 875 | |
| 876 | if (task->sc != task->cur_sc) |
| 877 | /* We didn't do the task first, because we wanted to wait for the |
| 878 | threads; do it now. */ |
| 879 | task_running = proc_update_sc (task); |
| 880 | |
| 881 | inf_debug (inf, "%srunning...", |
| 882 | (thread_running && task_running) ? "" : "not "); |
| 883 | |
| 884 | inf->running = thread_running && task_running; |
| 885 | |
| 886 | /* Once any thread has executed some code, we can't depend on the |
| 887 | threads list any more. */ |
| 888 | if (inf->running) |
| 889 | inf->threads_up_to_date = 0; |
| 890 | |
| 891 | return inf->running; |
| 892 | } |
| 893 | |
| 894 | return 0; |
| 895 | } |
| 896 | \f |
| 897 | /* Converts a GDB pid to a struct proc. */ |
| 898 | struct proc * |
| 899 | inf_tid_to_thread (struct inf *inf, int tid) |
| 900 | { |
| 901 | struct proc *thread = inf->threads; |
| 902 | |
| 903 | while (thread) |
| 904 | if (thread->tid == tid) |
| 905 | return thread; |
| 906 | else |
| 907 | thread = thread->next; |
| 908 | return 0; |
| 909 | } |
| 910 | |
| 911 | /* Converts a thread port to a struct proc. */ |
| 912 | struct proc * |
| 913 | inf_port_to_thread (struct inf *inf, mach_port_t port) |
| 914 | { |
| 915 | struct proc *thread = inf->threads; |
| 916 | while (thread) |
| 917 | if (thread->port == port) |
| 918 | return thread; |
| 919 | else |
| 920 | thread = thread->next; |
| 921 | return 0; |
| 922 | } |
| 923 | \f |
| 924 | /* Make INF's list of threads be consistent with reality of TASK. */ |
| 925 | void |
| 926 | inf_validate_procs (struct inf *inf) |
| 927 | { |
| 928 | int i; |
| 929 | thread_array_t threads; |
| 930 | unsigned num_threads; |
| 931 | struct proc *task = inf->task; |
| 932 | |
| 933 | /* If no threads are currently running, this function will guarantee that |
| 934 | things are up to date. The exception is if there are zero threads -- |
| 935 | then it is almost certainly in an odd state, and probably some outside |
| 936 | agent will create threads. */ |
| 937 | inf->threads_up_to_date = inf->threads ? !inf->running : 0; |
| 938 | |
| 939 | if (task) |
| 940 | { |
| 941 | error_t err = task_threads (task->port, &threads, &num_threads); |
| 942 | inf_debug (inf, "fetching threads"); |
| 943 | if (err) |
| 944 | /* TASK must be dead. */ |
| 945 | { |
| 946 | task->dead = 1; |
| 947 | task = 0; |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | if (!task) |
| 952 | { |
| 953 | num_threads = 0; |
| 954 | inf_debug (inf, "no task"); |
| 955 | } |
| 956 | |
| 957 | { |
| 958 | unsigned search_start = 0; /* Make things normally linear. */ |
| 959 | /* Which thread in PROCS corresponds to each task thread, & the task. */ |
| 960 | struct proc *matched[num_threads + 1]; |
| 961 | /* The last thread in INF->threads, so we can add to the end. */ |
| 962 | struct proc *last = 0; |
| 963 | /* The current thread we're considering. */ |
| 964 | struct proc *thread = inf->threads; |
| 965 | |
| 966 | bzero (matched, sizeof (matched)); |
| 967 | |
| 968 | while (thread) |
| 969 | { |
| 970 | unsigned left; |
| 971 | |
| 972 | for (i = search_start, left = num_threads; left; i++, left--) |
| 973 | { |
| 974 | if (i >= num_threads) |
| 975 | i -= num_threads; /* I wrapped around. */ |
| 976 | if (thread->port == threads[i]) |
| 977 | /* We already know about this thread. */ |
| 978 | { |
| 979 | matched[i] = thread; |
| 980 | last = thread; |
| 981 | thread = thread->next; |
| 982 | search_start++; |
| 983 | break; |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | if (! left) |
| 988 | { |
| 989 | proc_debug (thread, "died!"); |
| 990 | thread->port = MACH_PORT_NULL; |
| 991 | thread = _proc_free (thread); /* THREAD is dead. */ |
| 992 | (last ? last->next : inf->threads) = thread; |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | for (i = 0; i < num_threads; i++) |
| 997 | if (matched[i]) |
| 998 | /* Throw away the duplicate send right. */ |
| 999 | mach_port_deallocate (mach_task_self (), threads[i]); |
| 1000 | else |
| 1001 | /* THREADS[I] is a thread we don't know about yet! */ |
| 1002 | { |
| 1003 | thread = make_proc (inf, threads[i], next_thread_id++); |
| 1004 | (last ? last->next : inf->threads) = thread; |
| 1005 | last = thread; |
| 1006 | proc_debug (thread, "new thread: %d", threads[i]); |
| 1007 | add_thread (thread->tid); /* Tell GDB's generic thread code. */ |
| 1008 | } |
| 1009 | |
| 1010 | vm_deallocate(mach_task_self(), |
| 1011 | (vm_address_t)threads, (num_threads * sizeof(thread_t))); |
| 1012 | } |
| 1013 | } |
| 1014 | \f |
| 1015 | /* Makes sure that INF's thread list is synced with the actual process. */ |
| 1016 | inline int |
| 1017 | inf_update_procs (struct inf *inf) |
| 1018 | { |
| 1019 | if (! inf->task) |
| 1020 | return 0; |
| 1021 | if (! inf->threads_up_to_date) |
| 1022 | inf_validate_procs (inf); |
| 1023 | return !!inf->task; |
| 1024 | } |
| 1025 | |
| 1026 | /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0, |
| 1027 | and others are set to their run_sc if RUN_OTHERS is true, and otherwise |
| 1028 | their pause_sc. */ |
| 1029 | inline void |
| 1030 | inf_set_threads_resume_sc (struct inf *inf, |
| 1031 | struct proc *run_thread, int run_others) |
| 1032 | { |
| 1033 | struct proc *thread; |
| 1034 | inf_update_procs (inf); |
| 1035 | for (thread = inf->threads; thread; thread = thread->next) |
| 1036 | if (thread == run_thread) |
| 1037 | thread->resume_sc = 0; |
| 1038 | else if (run_others) |
| 1039 | thread->resume_sc = thread->run_sc; |
| 1040 | else |
| 1041 | thread->resume_sc = thread->pause_sc; |
| 1042 | } |
| 1043 | \f |
| 1044 | /* Cause INF to continue execution immediately; individual threads may still |
| 1045 | be suspended (but their suspend counts will be updated). */ |
| 1046 | inline void |
| 1047 | inf_resume (struct inf *inf) |
| 1048 | { |
| 1049 | struct proc *thread; |
| 1050 | |
| 1051 | inf_update_procs (inf); |
| 1052 | |
| 1053 | for (thread = inf->threads; thread; thread = thread->next) |
| 1054 | thread->sc = thread->resume_sc; |
| 1055 | |
| 1056 | if (inf->task) |
| 1057 | { |
| 1058 | if (! inf->pending_execs) |
| 1059 | /* Try to make sure our task count is correct -- in the case where |
| 1060 | we're waiting for an exec though, things are too volatile, so just |
| 1061 | assume things will be reasonable (which they usually will be). */ |
| 1062 | inf_validate_task_sc (inf); |
| 1063 | inf->task->sc = 0; |
| 1064 | } |
| 1065 | |
| 1066 | inf_update_suspends (inf); |
| 1067 | } |
| 1068 | |
| 1069 | /* Cause INF to stop execution immediately; individual threads may still |
| 1070 | be running. */ |
| 1071 | inline void |
| 1072 | inf_suspend (struct inf *inf) |
| 1073 | { |
| 1074 | struct proc *thread; |
| 1075 | |
| 1076 | inf_update_procs (inf); |
| 1077 | |
| 1078 | for (thread = inf->threads; thread; thread = thread->next) |
| 1079 | thread->sc = thread->pause_sc; |
| 1080 | |
| 1081 | if (inf->task) |
| 1082 | inf->task->sc = inf->pause_sc; |
| 1083 | |
| 1084 | inf_update_suspends (inf); |
| 1085 | } |
| 1086 | \f |
| 1087 | /* INF has one thread PROC that is in single-stepping mode. This function |
| 1088 | changes it to be PROC, changing any old step_thread to be a normal one. A |
| 1089 | PROC of 0 clears any existing value. */ |
| 1090 | void |
| 1091 | inf_set_step_thread (struct inf *inf, struct proc *thread) |
| 1092 | { |
| 1093 | assert (!thread || proc_is_thread (thread)); |
| 1094 | |
| 1095 | if (thread) |
| 1096 | inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid); |
| 1097 | else |
| 1098 | inf_debug (inf, "clearing step thread"); |
| 1099 | |
| 1100 | if (inf->step_thread != thread) |
| 1101 | { |
| 1102 | if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL) |
| 1103 | if (! proc_trace (inf->step_thread, 0)) |
| 1104 | return; |
| 1105 | if (thread && proc_trace (thread, 1)) |
| 1106 | inf->step_thread = thread; |
| 1107 | else |
| 1108 | inf->step_thread = 0; |
| 1109 | } |
| 1110 | } |
| 1111 | \f |
| 1112 | /* Set up the thread resume_sc's so that only the signal thread is running |
| 1113 | (plus whatever other thread are set to always run). Returns true if we |
| 1114 | did so, or false if we can't find a signal thread. */ |
| 1115 | inline int |
| 1116 | inf_set_threads_resume_sc_for_signal_thread (struct inf *inf) |
| 1117 | { |
| 1118 | if (inf->signal_thread) |
| 1119 | { |
| 1120 | inf_set_threads_resume_sc (inf, inf->signal_thread, 0); |
| 1121 | return 1; |
| 1122 | } |
| 1123 | else |
| 1124 | return 0; |
| 1125 | } |
| 1126 | |
| 1127 | static void |
| 1128 | inf_update_signal_thread (struct inf *inf) |
| 1129 | { |
| 1130 | /* XXX for now we assume that if there's a msgport, the 2nd thread is |
| 1131 | the signal thread. */ |
| 1132 | inf->signal_thread = inf->threads ? inf->threads->next : 0; |
| 1133 | } |
| 1134 | \f |
| 1135 | /* Detachs from INF's inferior task, letting it run once again... */ |
| 1136 | void |
| 1137 | inf_detach (struct inf *inf) |
| 1138 | { |
| 1139 | struct proc *task = inf->task; |
| 1140 | |
| 1141 | inf_debug (inf, "detaching..."); |
| 1142 | |
| 1143 | inf_clear_wait (inf); |
| 1144 | inf_set_step_thread (inf, 0); |
| 1145 | |
| 1146 | if (task) |
| 1147 | { |
| 1148 | struct proc *thread; |
| 1149 | |
| 1150 | inf_set_traced (inf, 0); |
| 1151 | if (inf->stopped) |
| 1152 | inf_signal (inf, TARGET_SIGNAL_0); |
| 1153 | |
| 1154 | proc_restore_exc_port (task); |
| 1155 | task->sc = inf->detach_sc; |
| 1156 | |
| 1157 | for (thread = inf->threads; thread; thread = thread->next) |
| 1158 | { |
| 1159 | proc_restore_exc_port (thread); |
| 1160 | thread->sc = thread->detach_sc; |
| 1161 | } |
| 1162 | |
| 1163 | inf_update_suspends (inf); |
| 1164 | } |
| 1165 | |
| 1166 | inf_cleanup (inf); |
| 1167 | } |
| 1168 | |
| 1169 | /* Attaches INF to the process with process id PID, returning it in a suspended |
| 1170 | state suitable for debugging. */ |
| 1171 | void |
| 1172 | inf_attach (struct inf *inf, int pid) |
| 1173 | { |
| 1174 | inf_debug (inf, "attaching: %d", pid); |
| 1175 | |
| 1176 | if (inf->pid) |
| 1177 | inf_detach (inf); |
| 1178 | |
| 1179 | inf_startup (inf, pid); |
| 1180 | } |
| 1181 | \f |
| 1182 | /* Makes sure that we've got our exception ports entrenched in the process. */ |
| 1183 | void inf_steal_exc_ports (struct inf *inf) |
| 1184 | { |
| 1185 | struct proc *thread; |
| 1186 | |
| 1187 | inf_debug (inf, "stealing exception ports"); |
| 1188 | |
| 1189 | inf_set_step_thread (inf, 0); /* The step thread is special. */ |
| 1190 | |
| 1191 | proc_steal_exc_port (inf->task, inf->event_port); |
| 1192 | for (thread = inf->threads; thread; thread = thread->next) |
| 1193 | proc_steal_exc_port (thread, MACH_PORT_NULL); |
| 1194 | } |
| 1195 | |
| 1196 | /* Makes sure the process has its own exception ports. */ |
| 1197 | void inf_restore_exc_ports (struct inf *inf) |
| 1198 | { |
| 1199 | struct proc *thread; |
| 1200 | |
| 1201 | inf_debug (inf, "restoring exception ports"); |
| 1202 | |
| 1203 | inf_set_step_thread (inf, 0); /* The step thread is special. */ |
| 1204 | |
| 1205 | proc_restore_exc_port (inf->task); |
| 1206 | for (thread = inf->threads; thread; thread = thread->next) |
| 1207 | proc_restore_exc_port (thread); |
| 1208 | } |
| 1209 | \f |
| 1210 | /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even |
| 1211 | signal 0, will continue it. INF is assumed to be in a paused state, and |
| 1212 | the resume_sc's of INF's threads may be affected. */ |
| 1213 | void |
| 1214 | inf_signal (struct inf *inf, enum target_signal sig) |
| 1215 | { |
| 1216 | error_t err = 0; |
| 1217 | int host_sig = target_signal_to_host (sig); |
| 1218 | |
| 1219 | #define NAME target_signal_to_name (sig) |
| 1220 | |
| 1221 | if (host_sig >= _NSIG) |
| 1222 | /* A mach exception. Exceptions are encoded in the signal space by |
| 1223 | putting them after _NSIG; this assumes they're positive (and not |
| 1224 | extremely large)! */ |
| 1225 | { |
| 1226 | struct inf_wait *w = &inf->wait; |
| 1227 | if (w->status.kind == TARGET_WAITKIND_STOPPED |
| 1228 | && w->status.value.sig == sig |
| 1229 | && w->thread && !w->thread->aborted) |
| 1230 | /* We're passing through the last exception we received. This is |
| 1231 | kind of bogus, because exceptions are per-thread whereas gdb |
| 1232 | treats signals as per-process. We just forward the exception to |
| 1233 | the correct handler, even it's not for the same thread as TID -- |
| 1234 | i.e., we pretend it's global. */ |
| 1235 | { |
| 1236 | struct exc_state *e = &w->exc; |
| 1237 | inf_debug (inf, "passing through exception:" |
| 1238 | " task = %d, thread = %d, exc = %d" |
| 1239 | ", code = %d, subcode = %d", |
| 1240 | w->thread->port, inf->task->port, |
| 1241 | e->exception, e->code, e->subcode); |
| 1242 | err = |
| 1243 | exception_raise_request (e->handler, |
| 1244 | e->reply, MACH_MSG_TYPE_MOVE_SEND_ONCE, |
| 1245 | w->thread->port, inf->task->port, |
| 1246 | e->exception, e->code, e->subcode); |
| 1247 | } |
| 1248 | else |
| 1249 | error ("Can't forward spontaneous exception (%s).", NAME); |
| 1250 | } |
| 1251 | else |
| 1252 | /* A Unix signal. */ |
| 1253 | if (inf->stopped) |
| 1254 | /* The process is stopped and expecting a signal. Just send off a |
| 1255 | request and let it get handled when we resume everything. */ |
| 1256 | { |
| 1257 | inf_debug (inf, "sending %s to stopped process", NAME); |
| 1258 | err = |
| 1259 | INF_MSGPORT_RPC (inf, |
| 1260 | msg_sig_post_untraced_request (msgport, |
| 1261 | inf->event_port, |
| 1262 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
| 1263 | host_sig, 0, |
| 1264 | refport)); |
| 1265 | if (! err) |
| 1266 | /* Posting an untraced signal automatically continues it. |
| 1267 | We clear this here rather than when we get the reply |
| 1268 | because we'd rather assume it's not stopped when it |
| 1269 | actually is, than the reverse. */ |
| 1270 | inf->stopped = 0; |
| 1271 | } |
| 1272 | else |
| 1273 | /* It's not expecting it. We have to let just the signal thread |
| 1274 | run, and wait for it to get into a reasonable state before we |
| 1275 | can continue the rest of the process. When we finally resume the |
| 1276 | process the signal we request will be the very first thing that |
| 1277 | happens. */ |
| 1278 | { |
| 1279 | inf_debug (inf, "sending %s to unstopped process (so resuming signal thread)", NAME); |
| 1280 | err = |
| 1281 | INF_RESUME_MSGPORT_RPC (inf, msg_sig_post_untraced (msgport, |
| 1282 | host_sig, 0, refport)); |
| 1283 | } |
| 1284 | |
| 1285 | if (err == EIEIO) |
| 1286 | /* Can't do too much... */ |
| 1287 | warning ("Can't deliver signal %s: No signal thread.", NAME); |
| 1288 | else if (err) |
| 1289 | warning ("Delivering signal %s: %s", NAME, strerror (err)); |
| 1290 | |
| 1291 | #undef NAME |
| 1292 | } |
| 1293 | \f |
| 1294 | /* The inferior used for all gdb target ops. */ |
| 1295 | struct inf *current_inferior = 0; |
| 1296 | |
| 1297 | /* The inferior being waited for by gnu_wait. Since GDB is decidely not |
| 1298 | multi-threaded, we don't bother to lock this. */ |
| 1299 | struct inf *waiting_inf; |
| 1300 | |
| 1301 | /* Wait for something to happen in the inferior, returning what in STATUS. */ |
| 1302 | static int |
| 1303 | gnu_wait (int tid, struct target_waitstatus *status) |
| 1304 | { |
| 1305 | struct msg { |
| 1306 | mach_msg_header_t hdr; |
| 1307 | mach_msg_type_t type; |
| 1308 | int data[8000]; |
| 1309 | } msg; |
| 1310 | error_t err; |
| 1311 | struct proc *thread; |
| 1312 | struct inf *inf = current_inferior; |
| 1313 | |
| 1314 | assert (inf->task); |
| 1315 | |
| 1316 | if (!inf->threads && !inf->pending_execs) |
| 1317 | /* No threads! Assume that maybe some outside agency is frobbing our |
| 1318 | task, and really look for new threads. If we can't find any, just tell |
| 1319 | the user to try again later. */ |
| 1320 | { |
| 1321 | inf_validate_procs (inf); |
| 1322 | if (!inf->threads && !inf->task->dead) |
| 1323 | error ("There are no threads; try again later."); |
| 1324 | } |
| 1325 | |
| 1326 | waiting_inf = inf; |
| 1327 | |
| 1328 | inf_debug (inf, "waiting for: %d", tid); |
| 1329 | |
| 1330 | rewait: |
| 1331 | if (proc_wait_pid != inf->pid && !inf->no_wait) |
| 1332 | /* Always get information on events from the proc server. */ |
| 1333 | { |
| 1334 | inf_debug (inf, "requesting wait on pid %d", inf->pid); |
| 1335 | |
| 1336 | if (proc_wait_pid) |
| 1337 | /* The proc server is single-threaded, and only allows a single |
| 1338 | outstanding wait request, so we have to cancel the previous one. */ |
| 1339 | { |
| 1340 | inf_debug (inf, "cancelling previous wait on pid %d", proc_wait_pid); |
| 1341 | interrupt_operation (proc_server, 0); |
| 1342 | } |
| 1343 | |
| 1344 | err = |
| 1345 | proc_wait_request (proc_server, inf->event_port, inf->pid, WUNTRACED); |
| 1346 | if (err) |
| 1347 | warning ("wait request failed: %s", strerror (err)); |
| 1348 | else |
| 1349 | { |
| 1350 | inf_debug (inf, "waits pending: %d", proc_waits_pending); |
| 1351 | proc_wait_pid = inf->pid; |
| 1352 | /* Even if proc_waits_pending was > 0 before, we still won't get |
| 1353 | any other replies, because it was either from a different INF, |
| 1354 | or a different process attached to INF -- and the event port, |
| 1355 | which is the wait reply port, changes when you switch processes.*/ |
| 1356 | proc_waits_pending = 1; |
| 1357 | } |
| 1358 | } |
| 1359 | |
| 1360 | inf_clear_wait (inf); |
| 1361 | |
| 1362 | /* What can happen? (1) Dead name notification; (2) Exceptions arrive; |
| 1363 | (3) wait reply from the proc server. */ |
| 1364 | |
| 1365 | inf_debug (inf, "waiting for an event..."); |
| 1366 | err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, |
| 1367 | 0, sizeof (struct msg), inf->event_port, |
| 1368 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); |
| 1369 | |
| 1370 | /* Re-suspend the task. */ |
| 1371 | inf_suspend (inf); |
| 1372 | |
| 1373 | if (!inf->task && inf->pending_execs) |
| 1374 | /* When doing an exec, it's possible that the old task wasn't reused |
| 1375 | (e.g., setuid execs). So if the task seems to have disappeared, |
| 1376 | attempt to refetch it, as the pid should still be the same. */ |
| 1377 | inf_set_pid (inf, inf->pid); |
| 1378 | |
| 1379 | if (err == EMACH_RCV_INTERRUPTED) |
| 1380 | inf_debug (inf, "interrupted"); |
| 1381 | else if (err) |
| 1382 | error ("Couldn't wait for an event: %s", strerror (err)); |
| 1383 | else |
| 1384 | { |
| 1385 | struct { |
| 1386 | mach_msg_header_t hdr; |
| 1387 | mach_msg_type_t err_type; |
| 1388 | kern_return_t err; |
| 1389 | char noise[200]; |
| 1390 | } reply; |
| 1391 | |
| 1392 | inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id); |
| 1393 | |
| 1394 | /* Handle what we got. */ |
| 1395 | if (! notify_server (&msg.hdr, &reply.hdr) |
| 1396 | && ! exc_server (&msg.hdr, &reply.hdr) |
| 1397 | && ! process_reply_server (&msg.hdr, &reply.hdr) |
| 1398 | && ! msg_reply_server (&msg.hdr, &reply.hdr)) |
| 1399 | /* Whatever it is, it's something strange. */ |
| 1400 | error ("Got a strange event, msg id = %d.", msg.hdr.msgh_id); |
| 1401 | |
| 1402 | if (reply.err) |
| 1403 | error ("Handling event, msgid = %d: %s", |
| 1404 | msg.hdr.msgh_id, strerror (reply.err)); |
| 1405 | } |
| 1406 | |
| 1407 | if (inf->pending_execs) |
| 1408 | /* We're waiting for the inferior to finish execing. */ |
| 1409 | { |
| 1410 | struct inf_wait *w = &inf->wait; |
| 1411 | enum target_waitkind kind = w->status.kind; |
| 1412 | |
| 1413 | if (kind == TARGET_WAITKIND_SPURIOUS) |
| 1414 | /* Since gdb is actually counting the number of times the inferior |
| 1415 | stops, expecting one stop per exec, we only return major events |
| 1416 | while execing. */ |
| 1417 | { |
| 1418 | w->suppress = 1; |
| 1419 | inf_debug (inf, "pending_execs = %d, ignoring minor event", |
| 1420 | inf->pending_execs); |
| 1421 | } |
| 1422 | else if (kind == TARGET_WAITKIND_STOPPED |
| 1423 | && w->status.value.sig == TARGET_SIGNAL_TRAP) |
| 1424 | /* Ah hah! A SIGTRAP from the inferior while starting up probably |
| 1425 | means we've succesfully completed an exec! */ |
| 1426 | { |
| 1427 | if (--inf->pending_execs == 0) |
| 1428 | /* We're done! */ |
| 1429 | { |
| 1430 | #if 0 /* do we need this? */ |
| 1431 | prune_threads (1); /* Get rid of the old shell threads */ |
| 1432 | renumber_threads (0); /* Give our threads reasonable names. */ |
| 1433 | #endif |
| 1434 | } |
| 1435 | inf_debug (inf, "pending exec completed, pending_execs => %d", |
| 1436 | inf->pending_execs); |
| 1437 | } |
| 1438 | else if (kind == TARGET_WAITKIND_STOPPED) |
| 1439 | /* It's possible that this signal is because of a crashed process |
| 1440 | being handled by the hurd crash server; in this case, the process |
| 1441 | will have an extra task suspend, which we need to know about. |
| 1442 | Since the code in inf_resume that normally checks for this is |
| 1443 | disabled while INF->pending_execs, we do the check here instead. */ |
| 1444 | inf_validate_task_sc (inf); |
| 1445 | } |
| 1446 | |
| 1447 | if (inf->wait.suppress) |
| 1448 | /* Some totally spurious event happened that we don't consider |
| 1449 | worth returning to gdb. Just keep waiting. */ |
| 1450 | { |
| 1451 | inf_debug (inf, "suppressing return, rewaiting..."); |
| 1452 | inf_resume (inf); |
| 1453 | goto rewait; |
| 1454 | } |
| 1455 | |
| 1456 | /* Pass back out our results. */ |
| 1457 | bcopy (&inf->wait.status, status, sizeof (*status)); |
| 1458 | |
| 1459 | thread = inf->wait.thread; |
| 1460 | if (thread) |
| 1461 | tid = thread->tid; |
| 1462 | else |
| 1463 | thread = inf_tid_to_thread (inf, tid); |
| 1464 | |
| 1465 | if (!thread || thread->port == MACH_PORT_NULL) |
| 1466 | /* TID is dead; try and find a new thread. */ |
| 1467 | if (inf_update_procs (inf) && inf->threads) |
| 1468 | tid = inf->threads->tid; /* The first available thread. */ |
| 1469 | else |
| 1470 | tid = inferior_pid; /* let wait_for_inferior handle exit case */ |
| 1471 | |
| 1472 | if (thread && tid >= 0 && status->kind != TARGET_WAITKIND_SPURIOUS |
| 1473 | && inf->pause_sc == 0 && thread->pause_sc == 0) |
| 1474 | /* If something actually happened to THREAD, make sure we suspend it. */ |
| 1475 | { |
| 1476 | thread->sc = 1; |
| 1477 | inf_update_suspends (inf); |
| 1478 | } |
| 1479 | |
| 1480 | inf_debug (inf, "returning tid = %d, status = %s (%d)", tid, |
| 1481 | status->kind == TARGET_WAITKIND_EXITED ? "EXITED" |
| 1482 | : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED" |
| 1483 | : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED" |
| 1484 | : status->kind == TARGET_WAITKIND_LOADED ? "LOADED" |
| 1485 | : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS" |
| 1486 | : "?", |
| 1487 | status->value.integer); |
| 1488 | |
| 1489 | return tid; |
| 1490 | } |
| 1491 | \f |
| 1492 | /* The rpc handler called by exc_server. */ |
| 1493 | error_t |
| 1494 | S_exception_raise_request (mach_port_t port, mach_port_t reply_port, |
| 1495 | thread_t thread_port, task_t task_port, |
| 1496 | int exception, int code, int subcode) |
| 1497 | { |
| 1498 | struct inf *inf = waiting_inf; |
| 1499 | struct proc *thread = inf_port_to_thread (inf, thread_port); |
| 1500 | |
| 1501 | inf_debug (waiting_inf, |
| 1502 | "thread = %d, task = %d, exc = %d, code = %d, subcode = %d", |
| 1503 | thread_port, task_port, exception, code); |
| 1504 | |
| 1505 | if (!thread) |
| 1506 | /* We don't know about thread? */ |
| 1507 | { |
| 1508 | inf_update_procs (inf); |
| 1509 | thread = inf_port_to_thread (inf, thread_port); |
| 1510 | if (!thread) |
| 1511 | /* Give up, the generating thread is gone. */ |
| 1512 | return 0; |
| 1513 | } |
| 1514 | |
| 1515 | mach_port_deallocate (mach_task_self (), thread_port); |
| 1516 | mach_port_deallocate (mach_task_self (), task_port); |
| 1517 | |
| 1518 | if (! thread->aborted) |
| 1519 | /* THREAD hasn't been aborted since this exception happened (abortion |
| 1520 | clears any exception state), so it must be real. */ |
| 1521 | { |
| 1522 | /* Store away the details; this will destroy any previous info. */ |
| 1523 | inf->wait.thread = thread; |
| 1524 | |
| 1525 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; |
| 1526 | |
| 1527 | if (exception == EXC_BREAKPOINT) |
| 1528 | /* GDB likes to get SIGTRAP for breakpoints. */ |
| 1529 | { |
| 1530 | inf->wait.status.value.sig = TARGET_SIGNAL_TRAP; |
| 1531 | mach_port_deallocate (mach_task_self (), reply_port); |
| 1532 | } |
| 1533 | else |
| 1534 | /* Record the exception so that we can forward it later. */ |
| 1535 | { |
| 1536 | if (thread->exc_port == port) |
| 1537 | { |
| 1538 | inf_debug (waiting_inf, "Handler is thread exeption port <%d>", |
| 1539 | thread->saved_exc_port); |
| 1540 | inf->wait.exc.handler = thread->saved_exc_port; |
| 1541 | } |
| 1542 | else |
| 1543 | { |
| 1544 | inf_debug (waiting_inf, "Handler is task exeption port <%d>", |
| 1545 | inf->task->saved_exc_port); |
| 1546 | inf->wait.exc.handler = inf->task->saved_exc_port; |
| 1547 | assert (inf->task->exc_port == port); |
| 1548 | } |
| 1549 | if (inf->wait.exc.handler != MACH_PORT_NULL) |
| 1550 | /* Add a reference to the exception handler. */ |
| 1551 | mach_port_mod_refs (mach_task_self (), |
| 1552 | inf->wait.exc.handler, MACH_PORT_RIGHT_SEND, |
| 1553 | 1); |
| 1554 | |
| 1555 | inf->wait.exc.exception = exception; |
| 1556 | inf->wait.exc.code = code; |
| 1557 | inf->wait.exc.subcode = subcode; |
| 1558 | inf->wait.exc.reply = reply_port; |
| 1559 | |
| 1560 | /* Exceptions are encoded in the signal space by putting them after |
| 1561 | _NSIG; this assumes they're positive (and not extremely large)! */ |
| 1562 | inf->wait.status.value.sig = |
| 1563 | target_signal_from_host (_NSIG + exception); |
| 1564 | } |
| 1565 | } |
| 1566 | else |
| 1567 | /* A supppressed exception, which ignore. */ |
| 1568 | { |
| 1569 | inf->wait.suppress = 1; |
| 1570 | mach_port_deallocate (mach_task_self (), reply_port); |
| 1571 | } |
| 1572 | |
| 1573 | return 0; |
| 1574 | } |
| 1575 | \f |
| 1576 | /* Fill in INF's wait field after a task has died without giving us more |
| 1577 | detailed information. */ |
| 1578 | void |
| 1579 | inf_task_died_status (struct inf *inf) |
| 1580 | { |
| 1581 | warning ("Pid %d died with unknown exit status, using SIGKILL.", inf->pid); |
| 1582 | inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED; |
| 1583 | inf->wait.status.value.sig = TARGET_SIGNAL_KILL; |
| 1584 | } |
| 1585 | |
| 1586 | /* Notify server routines. The only real one is dead name notification. */ |
| 1587 | error_t |
| 1588 | do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port) |
| 1589 | { |
| 1590 | struct inf *inf = waiting_inf; |
| 1591 | |
| 1592 | inf_debug (waiting_inf, "port = %d", dead_port); |
| 1593 | |
| 1594 | if (inf->task && inf->task->port == dead_port) |
| 1595 | { |
| 1596 | proc_debug (inf->task, "is dead"); |
| 1597 | inf->task->port = MACH_PORT_NULL; |
| 1598 | if (proc_wait_pid == inf->pid) |
| 1599 | /* We have a wait outstanding on the process, which will return more |
| 1600 | detailed information, so delay until we get that. */ |
| 1601 | inf->wait.suppress = 1; |
| 1602 | else |
| 1603 | /* We never waited for the process (maybe it wasn't a child), so just |
| 1604 | pretend it got a SIGKILL. */ |
| 1605 | inf_task_died_status (inf); |
| 1606 | } |
| 1607 | else |
| 1608 | { |
| 1609 | struct proc *thread = inf_port_to_thread (inf, dead_port); |
| 1610 | if (thread) |
| 1611 | { |
| 1612 | proc_debug (thread, "is dead"); |
| 1613 | thread->port = MACH_PORT_NULL; |
| 1614 | } |
| 1615 | } |
| 1616 | |
| 1617 | mach_port_deallocate (mach_task_self (), dead_port); |
| 1618 | inf->threads_up_to_date = 0; /* Just in case */ |
| 1619 | |
| 1620 | return 0; |
| 1621 | } |
| 1622 | \f |
| 1623 | static error_t |
| 1624 | ill_rpc (char *fun) |
| 1625 | { |
| 1626 | warning ("illegal rpc: %s", fun); |
| 1627 | return 0; |
| 1628 | } |
| 1629 | |
| 1630 | error_t |
| 1631 | do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t count) |
| 1632 | { |
| 1633 | return ill_rpc (__FUNCTION__); |
| 1634 | } |
| 1635 | |
| 1636 | error_t |
| 1637 | do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name) |
| 1638 | { |
| 1639 | return ill_rpc (__FUNCTION__); |
| 1640 | } |
| 1641 | |
| 1642 | error_t |
| 1643 | do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name) |
| 1644 | { |
| 1645 | return ill_rpc (__FUNCTION__); |
| 1646 | } |
| 1647 | |
| 1648 | error_t |
| 1649 | do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name) |
| 1650 | { |
| 1651 | return ill_rpc (__FUNCTION__); |
| 1652 | } |
| 1653 | |
| 1654 | error_t |
| 1655 | do_mach_notify_send_once (mach_port_t notify) |
| 1656 | { |
| 1657 | return ill_rpc (__FUNCTION__); |
| 1658 | } |
| 1659 | \f |
| 1660 | /* Process_reply server routines. We only use process_wait_reply. */ |
| 1661 | |
| 1662 | error_t |
| 1663 | S_proc_wait_reply (mach_port_t reply, error_t err, |
| 1664 | int status, int sigcode, rusage_t rusage, pid_t pid) |
| 1665 | { |
| 1666 | struct inf *inf = waiting_inf; |
| 1667 | |
| 1668 | inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d", |
| 1669 | err ? strerror (err) : "0", pid, status, sigcode); |
| 1670 | |
| 1671 | if (err && proc_wait_pid && (!inf->task || !inf->task->port)) |
| 1672 | /* Ack. The task has died, but the task-died notification code didn't |
| 1673 | tell anyone because it thought a more detailed reply from the |
| 1674 | procserver was forthcoming. However, we now learn that won't |
| 1675 | happen... So we have to act like the task just died, and this time, |
| 1676 | tell the world. */ |
| 1677 | inf_task_died_status (inf); |
| 1678 | |
| 1679 | if (--proc_waits_pending == 0) |
| 1680 | /* PROC_WAIT_PID represents the most recent wait. We will always get |
| 1681 | replies in order because the proc server is single threaded. */ |
| 1682 | proc_wait_pid = 0; |
| 1683 | |
| 1684 | inf_debug (inf, "waits pending now: %d", proc_waits_pending); |
| 1685 | |
| 1686 | if (err) |
| 1687 | { |
| 1688 | if (err != EINTR) |
| 1689 | { |
| 1690 | warning ("Can't wait for pid %d: %s", inf->pid, strerror (err)); |
| 1691 | inf->no_wait = 1; |
| 1692 | |
| 1693 | /* Since we can't see the inferior's signals, don't trap them. */ |
| 1694 | inf_set_traced (inf, 0); |
| 1695 | } |
| 1696 | } |
| 1697 | else if (pid == inf->pid) |
| 1698 | { |
| 1699 | store_waitstatus (&inf->wait.status, status); |
| 1700 | if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED) |
| 1701 | /* The process has sent us a signal, and stopped itself in a sane |
| 1702 | state pending our actions. */ |
| 1703 | { |
| 1704 | inf_debug (inf, "process has stopped itself"); |
| 1705 | inf->stopped = 1; |
| 1706 | } |
| 1707 | } |
| 1708 | else |
| 1709 | inf->wait.suppress = 1; /* Something odd happened. Ignore. */ |
| 1710 | |
| 1711 | return 0; |
| 1712 | } |
| 1713 | |
| 1714 | error_t |
| 1715 | S_proc_setmsgport_reply (mach_port_t reply, error_t err, |
| 1716 | mach_port_t old_msg_port) |
| 1717 | { |
| 1718 | return ill_rpc (__FUNCTION__); |
| 1719 | } |
| 1720 | |
| 1721 | error_t |
| 1722 | S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port) |
| 1723 | { |
| 1724 | return ill_rpc (__FUNCTION__); |
| 1725 | } |
| 1726 | \f |
| 1727 | /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */ |
| 1728 | |
| 1729 | error_t |
| 1730 | S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err) |
| 1731 | { |
| 1732 | struct inf *inf = waiting_inf; |
| 1733 | |
| 1734 | if (err == EBUSY) |
| 1735 | /* EBUSY is what we get when the crash server has grabbed control of the |
| 1736 | process and doesn't like what signal we tried to send it. Just act |
| 1737 | like the process stopped (using a signal of 0 should mean that the |
| 1738 | *next* time the user continues, it will pass signal 0, which the crash |
| 1739 | server should like). */ |
| 1740 | { |
| 1741 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; |
| 1742 | inf->wait.status.value.sig = TARGET_SIGNAL_0; |
| 1743 | } |
| 1744 | else if (err) |
| 1745 | warning ("Signal delivery failed: %s", strerror (err)); |
| 1746 | |
| 1747 | if (err) |
| 1748 | /* We only get this reply when we've posted a signal to a process which we |
| 1749 | thought was stopped, and which we expected to continue after the signal. |
| 1750 | Given that the signal has failed for some reason, it's reasonable to |
| 1751 | assume it's still stopped. */ |
| 1752 | inf->stopped = 1; |
| 1753 | else |
| 1754 | inf->wait.suppress = 1; |
| 1755 | |
| 1756 | return 0; |
| 1757 | } |
| 1758 | |
| 1759 | error_t |
| 1760 | S_msg_sig_post_reply (mach_port_t reply, error_t err) |
| 1761 | { |
| 1762 | return ill_rpc (__FUNCTION__); |
| 1763 | } |
| 1764 | \f |
| 1765 | /* Returns the number of messages queued for the receive right PORT. */ |
| 1766 | static mach_port_msgcount_t |
| 1767 | port_msgs_queued (mach_port_t port) |
| 1768 | { |
| 1769 | struct mach_port_status status; |
| 1770 | error_t err = |
| 1771 | mach_port_get_receive_status (mach_task_self (), port, &status); |
| 1772 | |
| 1773 | if (err) |
| 1774 | return 0; |
| 1775 | else |
| 1776 | return status.mps_msgcount; |
| 1777 | } |
| 1778 | \f |
| 1779 | /* Resume execution of the inferior process. |
| 1780 | |
| 1781 | If STEP is nonzero, single-step it. |
| 1782 | If SIGNAL is nonzero, give it that signal. |
| 1783 | |
| 1784 | TID STEP: |
| 1785 | -1 true Single step the current thread allowing other threads to run. |
| 1786 | -1 false Continue the current thread allowing other threads to run. |
| 1787 | X true Single step the given thread, don't allow any others to run. |
| 1788 | X false Continue the given thread, do not allow any others to run. |
| 1789 | (Where X, of course, is anything except -1) |
| 1790 | |
| 1791 | Note that a resume may not `take' if there are pending exceptions/&c |
| 1792 | still unprocessed from the last resume we did (any given resume may result |
| 1793 | in multiple events returned by wait). |
| 1794 | */ |
| 1795 | static void |
| 1796 | gnu_resume (int tid, int step, enum target_signal sig) |
| 1797 | { |
| 1798 | struct proc *step_thread = 0; |
| 1799 | struct inf *inf = current_inferior; |
| 1800 | |
| 1801 | inf_debug (inf, "tid = %d, step = %d, sig = %d", tid, step, sig); |
| 1802 | |
| 1803 | if (sig != TARGET_SIGNAL_0 || inf->stopped) |
| 1804 | inf_signal (inf, sig); |
| 1805 | else if (inf->wait.exc.reply != MACH_PORT_NULL) |
| 1806 | /* We received an exception to which we have chosen not to forward, so |
| 1807 | abort the faulting thread, which will perhaps retake it. */ |
| 1808 | { |
| 1809 | proc_abort (inf->wait.thread, 1); |
| 1810 | warning ("Aborting %s with unforwarded exception %s.", |
| 1811 | proc_string (inf->wait.thread), |
| 1812 | target_signal_to_name (inf->wait.status.value.sig)); |
| 1813 | } |
| 1814 | |
| 1815 | if (port_msgs_queued (inf->event_port)) |
| 1816 | /* If there are still messages in our event queue, don't bother resuming |
| 1817 | the process, as we're just going to stop it right away anyway. */ |
| 1818 | return; |
| 1819 | |
| 1820 | inf_update_procs (inf); |
| 1821 | |
| 1822 | if (tid < 0) |
| 1823 | /* Allow all threads to run, except perhaps single-stepping one. */ |
| 1824 | { |
| 1825 | inf_debug (inf, "running all threads; tid = %d", inferior_pid); |
| 1826 | tid = inferior_pid; /* What to step. */ |
| 1827 | inf_set_threads_resume_sc (inf, 0, 1); |
| 1828 | } |
| 1829 | else |
| 1830 | /* Just allow a single thread to run. */ |
| 1831 | { |
| 1832 | struct proc *thread = inf_tid_to_thread (inf, tid); |
| 1833 | if (! thread) |
| 1834 | error ("Can't run single thread id %d: no such thread!"); |
| 1835 | inf_debug (inf, "running one thread: %d/%d", inf->pid, thread->tid); |
| 1836 | inf_set_threads_resume_sc (inf, thread, 0); |
| 1837 | } |
| 1838 | |
| 1839 | if (step) |
| 1840 | { |
| 1841 | step_thread = inf_tid_to_thread (inf, tid); |
| 1842 | if (! step_thread) |
| 1843 | warning ("Can't step thread id %d: no such thread.", tid); |
| 1844 | else |
| 1845 | inf_debug (inf, "stepping thread: %d/%d", inf->pid, step_thread->tid); |
| 1846 | } |
| 1847 | if (step_thread != inf->step_thread) |
| 1848 | inf_set_step_thread (inf, step_thread); |
| 1849 | |
| 1850 | inf_debug (inf, "here we go..."); |
| 1851 | inf_resume (inf); |
| 1852 | } |
| 1853 | \f |
| 1854 | static void |
| 1855 | gnu_kill_inferior () |
| 1856 | { |
| 1857 | struct proc *task = current_inferior->task; |
| 1858 | if (task) |
| 1859 | { |
| 1860 | proc_debug (task, "terminating..."); |
| 1861 | task_terminate (task->port); |
| 1862 | inf_set_pid (current_inferior, -1); |
| 1863 | } |
| 1864 | target_mourn_inferior (); |
| 1865 | } |
| 1866 | |
| 1867 | /* Clean up after the inferior dies. */ |
| 1868 | |
| 1869 | static void |
| 1870 | gnu_mourn_inferior () |
| 1871 | { |
| 1872 | inf_debug (current_inferior, "rip"); |
| 1873 | inf_detach (current_inferior); |
| 1874 | unpush_target (&gnu_ops); |
| 1875 | generic_mourn_inferior (); |
| 1876 | } |
| 1877 | \f |
| 1878 | /* Fork an inferior process, and start debugging it. */ |
| 1879 | |
| 1880 | /* Set INFERIOR_PID to the first thread available in the child, if any. */ |
| 1881 | static int |
| 1882 | inf_pick_first_thread () |
| 1883 | { |
| 1884 | if (current_inferior->task && current_inferior->threads) |
| 1885 | /* The first thread. */ |
| 1886 | return current_inferior->threads->tid; |
| 1887 | else |
| 1888 | /* What may be the next thread. */ |
| 1889 | return next_thread_id; |
| 1890 | } |
| 1891 | |
| 1892 | static struct inf * |
| 1893 | cur_inf () |
| 1894 | { |
| 1895 | if (! current_inferior) |
| 1896 | current_inferior = make_inf (); |
| 1897 | return current_inferior; |
| 1898 | } |
| 1899 | |
| 1900 | static void |
| 1901 | gnu_create_inferior (exec_file, allargs, env) |
| 1902 | char *exec_file; |
| 1903 | char *allargs; |
| 1904 | char **env; |
| 1905 | { |
| 1906 | struct inf *inf = cur_inf (); |
| 1907 | |
| 1908 | void trace_me () |
| 1909 | { |
| 1910 | /* We're in the child; make this process stop as soon as it execs. */ |
| 1911 | inf_debug (inf, "tracing self"); |
| 1912 | if (ptrace (PTRACE_TRACEME) != 0) |
| 1913 | error ("ptrace (PTRACE_TRACEME) failed!"); |
| 1914 | } |
| 1915 | int attach_to_child (int pid) |
| 1916 | { |
| 1917 | /* Attach to the now stopped child, which is actually a shell... */ |
| 1918 | inf_debug (inf, "attaching to child: %d", pid); |
| 1919 | |
| 1920 | inf_attach (inf, pid); |
| 1921 | |
| 1922 | attach_flag = 0; |
| 1923 | push_target (&gnu_ops); |
| 1924 | |
| 1925 | inf->pending_execs = 2; |
| 1926 | inf->traced = 1; |
| 1927 | |
| 1928 | /* Now let the child run again, knowing that it will stop immediately |
| 1929 | because of the ptrace. */ |
| 1930 | inf_resume (inf); |
| 1931 | inferior_pid = inf_pick_first_thread (); |
| 1932 | |
| 1933 | startup_inferior (inf->pending_execs); |
| 1934 | |
| 1935 | return inferior_pid; |
| 1936 | } |
| 1937 | |
| 1938 | inf_debug (inf, "creating inferior"); |
| 1939 | |
| 1940 | fork_inferior (exec_file, allargs, env, trace_me, attach_to_child, NULL); |
| 1941 | |
| 1942 | inf_update_signal_thread (inf); |
| 1943 | inf_set_traced (inf, inf->want_signals); |
| 1944 | |
| 1945 | /* Execing the process will have trashed our exception ports; steal them |
| 1946 | back (or make sure they're restored if the user wants that). */ |
| 1947 | if (inf->want_exceptions) |
| 1948 | inf_steal_exc_ports (inf); |
| 1949 | else |
| 1950 | inf_restore_exc_ports (inf); |
| 1951 | |
| 1952 | /* Here we go! */ |
| 1953 | proceed ((CORE_ADDR) -1, 0, 0); |
| 1954 | } |
| 1955 | |
| 1956 | /* Mark our target-struct as eligible for stray "run" and "attach" |
| 1957 | commands. */ |
| 1958 | static int |
| 1959 | gnu_can_run () |
| 1960 | { |
| 1961 | return 1; |
| 1962 | } |
| 1963 | \f |
| 1964 | #ifdef ATTACH_DETACH |
| 1965 | |
| 1966 | /* Attach to process PID, then initialize for debugging it |
| 1967 | and wait for the trace-trap that results from attaching. */ |
| 1968 | static void |
| 1969 | gnu_attach (args, from_tty) |
| 1970 | char *args; |
| 1971 | int from_tty; |
| 1972 | { |
| 1973 | int pid; |
| 1974 | char *exec_file; |
| 1975 | struct inf *inf = cur_inf (); |
| 1976 | |
| 1977 | if (!args) |
| 1978 | error_no_arg ("PID to attach"); |
| 1979 | |
| 1980 | pid = atoi (args); |
| 1981 | |
| 1982 | if (pid == getpid()) /* Trying to masturbate? */ |
| 1983 | error ("I refuse to debug myself!"); |
| 1984 | |
| 1985 | if (from_tty) |
| 1986 | { |
| 1987 | exec_file = (char *) get_exec_file (0); |
| 1988 | |
| 1989 | if (exec_file) |
| 1990 | printf_unfiltered ("Attaching to program `%s', pid %d\n", |
| 1991 | exec_file, pid); |
| 1992 | else |
| 1993 | printf_unfiltered ("Attaching to pid %d\n", pid); |
| 1994 | |
| 1995 | gdb_flush (gdb_stdout); |
| 1996 | } |
| 1997 | |
| 1998 | inf_debug (inf, "attaching to pid: %d", pid); |
| 1999 | |
| 2000 | inf_attach (inf, pid); |
| 2001 | inf_update_procs (inf); |
| 2002 | |
| 2003 | inferior_pid = inf_pick_first_thread (); |
| 2004 | |
| 2005 | attach_flag = 1; |
| 2006 | push_target (&gnu_ops); |
| 2007 | |
| 2008 | inf_update_signal_thread (inf); |
| 2009 | inf_set_traced (inf, inf->want_signals); |
| 2010 | |
| 2011 | /* If the process was stopped before we attached, make it continue the next |
| 2012 | time the user does a continue. */ |
| 2013 | inf_validate_stopped (inf); |
| 2014 | |
| 2015 | #if 0 /* Do we need this? */ |
| 2016 | renumber_threads (0); /* Give our threads reasonable names. */ |
| 2017 | #endif |
| 2018 | } |
| 2019 | \f |
| 2020 | /* Take a program previously attached to and detaches it. |
| 2021 | The program resumes execution and will no longer stop |
| 2022 | on signals, etc. We'd better not have left any breakpoints |
| 2023 | in the program or it'll die when it hits one. For this |
| 2024 | to work, it may be necessary for the process to have been |
| 2025 | previously attached. It *might* work if the program was |
| 2026 | started via fork. */ |
| 2027 | static void |
| 2028 | gnu_detach (args, from_tty) |
| 2029 | char *args; |
| 2030 | int from_tty; |
| 2031 | { |
| 2032 | if (from_tty) |
| 2033 | { |
| 2034 | char *exec_file = get_exec_file (0); |
| 2035 | if (exec_file) |
| 2036 | printf_unfiltered ("Detaching from program `%s' pid %d\n", |
| 2037 | exec_file, current_inferior->pid); |
| 2038 | else |
| 2039 | printf_unfiltered ("Detaching from pid %d\n", current_inferior->pid); |
| 2040 | gdb_flush (gdb_stdout); |
| 2041 | } |
| 2042 | |
| 2043 | inf_detach (current_inferior); |
| 2044 | |
| 2045 | inferior_pid = 0; |
| 2046 | |
| 2047 | unpush_target (&gnu_ops); /* Pop out of handling an inferior */ |
| 2048 | } |
| 2049 | #endif /* ATTACH_DETACH */ |
| 2050 | |
| 2051 | static void |
| 2052 | gnu_terminal_init_inferior () |
| 2053 | { |
| 2054 | assert (current_inferior); |
| 2055 | terminal_init_inferior_with_pgrp (current_inferior->pid); |
| 2056 | } |
| 2057 | |
| 2058 | /* Get ready to modify the registers array. On machines which store |
| 2059 | individual registers, this doesn't need to do anything. On machines |
| 2060 | which store all the registers in one fell swoop, this makes sure |
| 2061 | that registers contains all the registers from the program being |
| 2062 | debugged. */ |
| 2063 | |
| 2064 | static void |
| 2065 | gnu_prepare_to_store () |
| 2066 | { |
| 2067 | #ifdef CHILD_PREPARE_TO_STORE |
| 2068 | CHILD_PREPARE_TO_STORE (); |
| 2069 | #endif |
| 2070 | } |
| 2071 | |
| 2072 | static void |
| 2073 | gnu_open (arg, from_tty) |
| 2074 | char *arg; |
| 2075 | int from_tty; |
| 2076 | { |
| 2077 | error ("Use the \"run\" command to start a Unix child process."); |
| 2078 | } |
| 2079 | |
| 2080 | static void |
| 2081 | gnu_stop () |
| 2082 | { |
| 2083 | error ("to_stop target function not implemented"); |
| 2084 | } |
| 2085 | |
| 2086 | static int |
| 2087 | gnu_thread_alive (int tid) |
| 2088 | { |
| 2089 | inf_update_procs (current_inferior); |
| 2090 | return !!inf_tid_to_thread (current_inferior, tid); |
| 2091 | } |
| 2092 | \f |
| 2093 | /* |
| 2094 | * Read inferior task's LEN bytes from ADDR and copy it to MYADDR |
| 2095 | * in gdb's address space. |
| 2096 | * |
| 2097 | * Return 0 on failure; number of bytes read otherwise. |
| 2098 | */ |
| 2099 | int |
| 2100 | gnu_read_inferior (task, addr, myaddr, length) |
| 2101 | task_t task; |
| 2102 | CORE_ADDR addr; |
| 2103 | char *myaddr; |
| 2104 | int length; |
| 2105 | { |
| 2106 | error_t err; |
| 2107 | vm_address_t low_address = (vm_address_t) trunc_page (addr); |
| 2108 | vm_size_t aligned_length = |
| 2109 | (vm_size_t) round_page (addr+length) - low_address; |
| 2110 | pointer_t copied; |
| 2111 | int copy_count; |
| 2112 | |
| 2113 | /* Get memory from inferior with page aligned addresses */ |
| 2114 | err = vm_read (task, low_address, aligned_length, &copied, ©_count); |
| 2115 | if (err) |
| 2116 | return 0; |
| 2117 | |
| 2118 | err = hurd_safe_copyin (myaddr, (void*)addr - low_address + copied, length); |
| 2119 | if (err) |
| 2120 | { |
| 2121 | warning ("Read from inferior faulted: %s", strerror (err)); |
| 2122 | length = 0; |
| 2123 | } |
| 2124 | |
| 2125 | err = vm_deallocate (mach_task_self (), copied, copy_count); |
| 2126 | if (err) |
| 2127 | warning ("gnu_read_inferior vm_deallocate failed: %s", strerror (err)); |
| 2128 | |
| 2129 | return length; |
| 2130 | } |
| 2131 | |
| 2132 | #define CHK_GOTO_OUT(str,ret) \ |
| 2133 | do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0) |
| 2134 | |
| 2135 | struct vm_region_list { |
| 2136 | struct vm_region_list *next; |
| 2137 | vm_prot_t protection; |
| 2138 | vm_address_t start; |
| 2139 | vm_size_t length; |
| 2140 | }; |
| 2141 | |
| 2142 | struct obstack region_obstack; |
| 2143 | |
| 2144 | /* |
| 2145 | * Write gdb's LEN bytes from MYADDR and copy it to ADDR |
| 2146 | * in inferior task's address space. |
| 2147 | */ |
| 2148 | int |
| 2149 | gnu_write_inferior (task, addr, myaddr, length) |
| 2150 | task_t task; |
| 2151 | CORE_ADDR addr; |
| 2152 | char *myaddr; |
| 2153 | int length; |
| 2154 | { |
| 2155 | error_t err = 0; |
| 2156 | vm_address_t low_address = (vm_address_t) trunc_page (addr); |
| 2157 | vm_size_t aligned_length = |
| 2158 | (vm_size_t) round_page (addr+length) - low_address; |
| 2159 | pointer_t copied; |
| 2160 | int copy_count; |
| 2161 | int deallocate = 0; |
| 2162 | |
| 2163 | char *errstr = "Bug in gnu_write_inferior"; |
| 2164 | |
| 2165 | struct vm_region_list *region_element; |
| 2166 | struct vm_region_list *region_head = (struct vm_region_list *)NULL; |
| 2167 | |
| 2168 | /* Get memory from inferior with page aligned addresses */ |
| 2169 | err = vm_read (task, |
| 2170 | low_address, |
| 2171 | aligned_length, |
| 2172 | &copied, |
| 2173 | ©_count); |
| 2174 | CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err); |
| 2175 | |
| 2176 | deallocate++; |
| 2177 | |
| 2178 | err = hurd_safe_copyout ((void*)addr - low_address + copied, myaddr, length); |
| 2179 | CHK_GOTO_OUT ("Write to inferior faulted", err); |
| 2180 | |
| 2181 | obstack_init (®ion_obstack); |
| 2182 | |
| 2183 | /* Do writes atomically. |
| 2184 | * First check for holes and unwritable memory. |
| 2185 | */ |
| 2186 | { |
| 2187 | vm_size_t remaining_length = aligned_length; |
| 2188 | vm_address_t region_address = low_address; |
| 2189 | |
| 2190 | struct vm_region_list *scan; |
| 2191 | |
| 2192 | while(region_address < low_address + aligned_length) |
| 2193 | { |
| 2194 | vm_prot_t protection; |
| 2195 | vm_prot_t max_protection; |
| 2196 | vm_inherit_t inheritance; |
| 2197 | boolean_t shared; |
| 2198 | mach_port_t object_name; |
| 2199 | vm_offset_t offset; |
| 2200 | vm_size_t region_length = remaining_length; |
| 2201 | vm_address_t old_address = region_address; |
| 2202 | |
| 2203 | err = vm_region (task, |
| 2204 | ®ion_address, |
| 2205 | ®ion_length, |
| 2206 | &protection, |
| 2207 | &max_protection, |
| 2208 | &inheritance, |
| 2209 | &shared, |
| 2210 | &object_name, |
| 2211 | &offset); |
| 2212 | CHK_GOTO_OUT ("vm_region failed", err); |
| 2213 | |
| 2214 | /* Check for holes in memory */ |
| 2215 | if (old_address != region_address) |
| 2216 | { |
| 2217 | warning ("No memory at 0x%x. Nothing written", |
| 2218 | old_address); |
| 2219 | err = KERN_SUCCESS; |
| 2220 | length = 0; |
| 2221 | goto out; |
| 2222 | } |
| 2223 | |
| 2224 | if (!(max_protection & VM_PROT_WRITE)) |
| 2225 | { |
| 2226 | warning ("Memory at address 0x%x is unwritable. Nothing written", |
| 2227 | old_address); |
| 2228 | err = KERN_SUCCESS; |
| 2229 | length = 0; |
| 2230 | goto out; |
| 2231 | } |
| 2232 | |
| 2233 | /* Chain the regions for later use */ |
| 2234 | region_element = |
| 2235 | (struct vm_region_list *) |
| 2236 | obstack_alloc (®ion_obstack, sizeof (struct vm_region_list)); |
| 2237 | |
| 2238 | region_element->protection = protection; |
| 2239 | region_element->start = region_address; |
| 2240 | region_element->length = region_length; |
| 2241 | |
| 2242 | /* Chain the regions along with protections */ |
| 2243 | region_element->next = region_head; |
| 2244 | region_head = region_element; |
| 2245 | |
| 2246 | region_address += region_length; |
| 2247 | remaining_length = remaining_length - region_length; |
| 2248 | } |
| 2249 | |
| 2250 | /* If things fail after this, we give up. |
| 2251 | * Somebody is messing up inferior_task's mappings. |
| 2252 | */ |
| 2253 | |
| 2254 | /* Enable writes to the chained vm regions */ |
| 2255 | for (scan = region_head; scan; scan = scan->next) |
| 2256 | { |
| 2257 | boolean_t protection_changed = FALSE; |
| 2258 | |
| 2259 | if (!(scan->protection & VM_PROT_WRITE)) |
| 2260 | { |
| 2261 | err = vm_protect (task, |
| 2262 | scan->start, |
| 2263 | scan->length, |
| 2264 | FALSE, |
| 2265 | scan->protection | VM_PROT_WRITE); |
| 2266 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); |
| 2267 | } |
| 2268 | } |
| 2269 | |
| 2270 | err = vm_write (task, |
| 2271 | low_address, |
| 2272 | copied, |
| 2273 | aligned_length); |
| 2274 | CHK_GOTO_OUT ("vm_write failed", err); |
| 2275 | |
| 2276 | /* Set up the original region protections, if they were changed */ |
| 2277 | for (scan = region_head; scan; scan = scan->next) |
| 2278 | { |
| 2279 | boolean_t protection_changed = FALSE; |
| 2280 | |
| 2281 | if (!(scan->protection & VM_PROT_WRITE)) |
| 2282 | { |
| 2283 | err = vm_protect (task, |
| 2284 | scan->start, |
| 2285 | scan->length, |
| 2286 | FALSE, |
| 2287 | scan->protection); |
| 2288 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); |
| 2289 | } |
| 2290 | } |
| 2291 | } |
| 2292 | |
| 2293 | out: |
| 2294 | if (deallocate) |
| 2295 | { |
| 2296 | obstack_free (®ion_obstack, 0); |
| 2297 | |
| 2298 | (void) vm_deallocate (mach_task_self (), |
| 2299 | copied, |
| 2300 | copy_count); |
| 2301 | } |
| 2302 | |
| 2303 | if (err != KERN_SUCCESS) |
| 2304 | { |
| 2305 | warning ("%s: %s", errstr, mach_error_string (err)); |
| 2306 | return 0; |
| 2307 | } |
| 2308 | |
| 2309 | return length; |
| 2310 | } |
| 2311 | \f |
| 2312 | /* Return 0 on failure, number of bytes handled otherwise. */ |
| 2313 | static int |
| 2314 | gnu_xfer_memory (memaddr, myaddr, len, write, target) |
| 2315 | CORE_ADDR memaddr; |
| 2316 | char *myaddr; |
| 2317 | int len; |
| 2318 | int write; |
| 2319 | struct target_ops *target; /* IGNORED */ |
| 2320 | { |
| 2321 | int result; |
| 2322 | task_t task = |
| 2323 | current_inferior |
| 2324 | ? (current_inferior->task ? current_inferior->task->port : 0) |
| 2325 | : 0; |
| 2326 | |
| 2327 | if (task == MACH_PORT_NULL) |
| 2328 | return 0; |
| 2329 | else |
| 2330 | { |
| 2331 | inf_debug (current_inferior, "%s %p[%d] %s %p", |
| 2332 | write ? "writing" : "reading", memaddr, len, |
| 2333 | write ? "<--" : "-->", myaddr); |
| 2334 | if (write) |
| 2335 | return gnu_write_inferior (task, memaddr, myaddr, len); |
| 2336 | else |
| 2337 | return gnu_read_inferior (task, memaddr, myaddr, len); |
| 2338 | } |
| 2339 | } |
| 2340 | \f |
| 2341 | extern void gnu_store_registers (int regno); |
| 2342 | extern void gnu_fetch_registers (int regno); |
| 2343 | |
| 2344 | struct target_ops gnu_ops = { |
| 2345 | "GNU", /* to_shortname */ |
| 2346 | "GNU Hurd process", /* to_longname */ |
| 2347 | "GNU Hurd process", /* to_doc */ |
| 2348 | gnu_open, /* to_open */ |
| 2349 | 0, /* to_close */ |
| 2350 | gnu_attach, /* to_attach */ |
| 2351 | gnu_detach, /* to_detach */ |
| 2352 | gnu_resume, /* to_resume */ |
| 2353 | gnu_wait, /* to_wait */ |
| 2354 | gnu_fetch_registers, /* to_fetch_registers */ |
| 2355 | gnu_store_registers, /* to_store_registers */ |
| 2356 | gnu_prepare_to_store, /* to_prepare_to_store */ |
| 2357 | gnu_xfer_memory, /* to_xfer_memory */ |
| 2358 | 0, /* to_files_info */ |
| 2359 | memory_insert_breakpoint, /* to_insert_breakpoint */ |
| 2360 | memory_remove_breakpoint, /* to_remove_breakpoint */ |
| 2361 | gnu_terminal_init_inferior, /* to_terminal_init */ |
| 2362 | terminal_inferior, /* to_terminal_inferior */ |
| 2363 | terminal_ours_for_output, /* to_terminal_ours_for_output */ |
| 2364 | terminal_ours, /* to_terminal_ours */ |
| 2365 | child_terminal_info, /* to_terminal_info */ |
| 2366 | gnu_kill_inferior, /* to_kill */ |
| 2367 | 0, /* to_load */ |
| 2368 | 0, /* to_lookup_symbol */ |
| 2369 | |
| 2370 | gnu_create_inferior, /* to_create_inferior */ |
| 2371 | gnu_mourn_inferior, /* to_mourn_inferior */ |
| 2372 | gnu_can_run, /* to_can_run */ |
| 2373 | 0, /* to_notice_signals */ |
| 2374 | gnu_thread_alive, /* to_thread_alive */ |
| 2375 | gnu_stop, /* to_stop */ |
| 2376 | process_stratum, /* to_stratum */ |
| 2377 | 0, /* to_next */ |
| 2378 | 1, /* to_has_all_memory */ |
| 2379 | 1, /* to_has_memory */ |
| 2380 | 1, /* to_has_stack */ |
| 2381 | 1, /* to_has_registers */ |
| 2382 | 1, /* to_has_execution */ |
| 2383 | 0, /* sections */ |
| 2384 | 0, /* sections_end */ |
| 2385 | OPS_MAGIC /* to_magic */ |
| 2386 | }; |
| 2387 | \f |
| 2388 | /* Return printable description of proc. */ |
| 2389 | char *proc_string (struct proc *proc) |
| 2390 | { |
| 2391 | static char tid_str[80]; |
| 2392 | if (proc_is_task (proc)) |
| 2393 | sprintf (tid_str, "process %d", proc->inf->pid); |
| 2394 | else |
| 2395 | sprintf (tid_str, "thread %d.%d", |
| 2396 | proc->inf->pid, pid_to_thread_id (proc->tid)); |
| 2397 | return tid_str; |
| 2398 | } |
| 2399 | |
| 2400 | char * |
| 2401 | gnu_target_pid_to_str (int tid) |
| 2402 | { |
| 2403 | struct inf *inf = current_inferior; |
| 2404 | struct proc *thread = inf_tid_to_thread (inf, tid); |
| 2405 | |
| 2406 | if (thread) |
| 2407 | return proc_string (thread); |
| 2408 | else |
| 2409 | { |
| 2410 | static char tid_str[80]; |
| 2411 | sprintf (tid_str, "bogus thread id %d", tid); |
| 2412 | return tid_str; |
| 2413 | } |
| 2414 | } |
| 2415 | \f |
| 2416 | /* User task commands. */ |
| 2417 | |
| 2418 | struct cmd_list_element *set_task_cmd_list = 0; |
| 2419 | struct cmd_list_element *show_task_cmd_list = 0; |
| 2420 | /* User thread commands. */ |
| 2421 | |
| 2422 | /* Commands with a prefix of `set/show thread'. */ |
| 2423 | extern struct cmd_list_element *thread_cmd_list; |
| 2424 | struct cmd_list_element *set_thread_cmd_list = NULL; |
| 2425 | struct cmd_list_element *show_thread_cmd_list = NULL; |
| 2426 | |
| 2427 | /* Commands with a prefix of `set/show thread default'. */ |
| 2428 | struct cmd_list_element *set_thread_default_cmd_list = NULL; |
| 2429 | struct cmd_list_element *show_thread_default_cmd_list = NULL; |
| 2430 | |
| 2431 | static void |
| 2432 | set_thread_cmd (char *args, int from_tty) |
| 2433 | { |
| 2434 | printf_unfiltered ("\"set thread\" must be followed by the name of a thread |
| 2435 | property, or \"default\".\n"); |
| 2436 | } |
| 2437 | |
| 2438 | static void |
| 2439 | show_thread_cmd (char *args, int from_tty) |
| 2440 | { |
| 2441 | printf_unfiltered ("\"show thread\" must be followed by the name of a thread property, or \"default\".\n"); |
| 2442 | } |
| 2443 | |
| 2444 | static void |
| 2445 | set_thread_default_cmd (char *args, int from_tty) |
| 2446 | { |
| 2447 | printf_unfiltered ("\"set thread default\" must be followed by the name of a thread property.\n"); |
| 2448 | } |
| 2449 | |
| 2450 | static void |
| 2451 | show_thread_default_cmd (char *args, int from_tty) |
| 2452 | { |
| 2453 | printf_unfiltered ("\"show thread default\" must be followed by the name of a thread property.\n"); |
| 2454 | } |
| 2455 | |
| 2456 | static int |
| 2457 | parse_int_arg (char *args, char *cmd_prefix) |
| 2458 | { |
| 2459 | if (args) |
| 2460 | { |
| 2461 | char *arg_end; |
| 2462 | int val = strtoul (args, &arg_end, 10); |
| 2463 | if (*args && *arg_end == '\0') |
| 2464 | return val; |
| 2465 | } |
| 2466 | error ("Illegal argument for \"%s\" command, should be an integer.", cmd_prefix); |
| 2467 | } |
| 2468 | |
| 2469 | static int |
| 2470 | _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix) |
| 2471 | { |
| 2472 | if (!args || strcmp (args, t_val) == 0) |
| 2473 | return 1; |
| 2474 | else if (strcmp (args, f_val) == 0) |
| 2475 | return 0; |
| 2476 | else |
| 2477 | error ("Illegal argument for \"%s\" command, should be \"%s\" or \"%s\".", |
| 2478 | cmd_prefix, t_val, f_val); |
| 2479 | } |
| 2480 | |
| 2481 | #define parse_bool_arg(args, cmd_prefix) \ |
| 2482 | _parse_bool_arg (args, "on", "off", cmd_prefix) |
| 2483 | |
| 2484 | static void |
| 2485 | check_empty (char *args, char *cmd_prefix) |
| 2486 | { |
| 2487 | if (args) |
| 2488 | error ("Garbage after \"%s\" command: `%s'", cmd_prefix, args); |
| 2489 | } |
| 2490 | |
| 2491 | /* Returns the alive thread named by INFERIOR_PID, or signals an error. */ |
| 2492 | static struct proc * |
| 2493 | cur_thread () |
| 2494 | { |
| 2495 | struct inf *inf = cur_inf (); |
| 2496 | struct proc *thread = inf_tid_to_thread (inf, inferior_pid); |
| 2497 | if (!thread) |
| 2498 | error ("No current thread."); |
| 2499 | return thread; |
| 2500 | } |
| 2501 | |
| 2502 | /* Returns the current inferior, but signals an error if it has no task. */ |
| 2503 | static struct inf * |
| 2504 | active_inf () |
| 2505 | { |
| 2506 | struct inf *inf = cur_inf (); |
| 2507 | if (! inf->task) |
| 2508 | error ("No current process."); |
| 2509 | return inf; |
| 2510 | } |
| 2511 | \f |
| 2512 | static void |
| 2513 | set_task_pause_cmd (char *args, int from_tty) |
| 2514 | { |
| 2515 | struct inf *inf = cur_inf (); |
| 2516 | int old_sc = inf->pause_sc; |
| 2517 | |
| 2518 | inf->pause_sc = parse_bool_arg (args, "set task pause"); |
| 2519 | |
| 2520 | if (old_sc == 0 && inf->pause_sc != 0) |
| 2521 | /* If the task is currently unsuspended, immediately suspend it, |
| 2522 | otherwise wait until the next time it gets control. */ |
| 2523 | inf_suspend (inf); |
| 2524 | } |
| 2525 | |
| 2526 | static void |
| 2527 | show_task_pause_cmd (char *args, int from_tty) |
| 2528 | { |
| 2529 | struct inf *inf = cur_inf (); |
| 2530 | check_empty (args, "show task pause"); |
| 2531 | printf_unfiltered ("The inferior task %s suspended while gdb has control.\n", |
| 2532 | inf->task |
| 2533 | ? (inf->pause_sc == 0 ? "isn't" : "is") |
| 2534 | : (inf->pause_sc == 0 ? "won't be" : "will be")); |
| 2535 | } |
| 2536 | |
| 2537 | static void |
| 2538 | set_task_detach_sc_cmd (char *args, int from_tty) |
| 2539 | { |
| 2540 | cur_inf ()->detach_sc = parse_int_arg (args, "set task detach-suspend-count"); |
| 2541 | } |
| 2542 | |
| 2543 | static void |
| 2544 | show_task_detach_sc_cmd (char *args, int from_tty) |
| 2545 | { |
| 2546 | check_empty (args, "show task detach-suspend-count"); |
| 2547 | printf_unfiltered ("The inferior task will be left with a suspend count of %d when detaching.\n", |
| 2548 | cur_inf ()->detach_sc); |
| 2549 | } |
| 2550 | \f |
| 2551 | static void |
| 2552 | set_thread_default_pause_cmd (char *args, int from_tty) |
| 2553 | { |
| 2554 | struct inf *inf = cur_inf (); |
| 2555 | inf->default_thread_pause_sc = |
| 2556 | parse_bool_arg (args, "set thread default pause") ? 0 : 1; |
| 2557 | } |
| 2558 | |
| 2559 | static void |
| 2560 | show_thread_default_pause_cmd (char *args, int from_tty) |
| 2561 | { |
| 2562 | struct inf *inf = cur_inf (); |
| 2563 | int sc = inf->default_thread_pause_sc; |
| 2564 | check_empty (args, "show thread default pause"); |
| 2565 | printf_unfiltered ("New threads %s suspended while gdb has control%s.\n", |
| 2566 | sc ? "are" : "aren't", |
| 2567 | !sc && inf->pause_sc ? " (but the task is)" : ""); |
| 2568 | } |
| 2569 | |
| 2570 | static void |
| 2571 | set_thread_default_run_cmd (char *args, int from_tty) |
| 2572 | { |
| 2573 | struct inf *inf = cur_inf (); |
| 2574 | inf->default_thread_run_sc = |
| 2575 | parse_bool_arg (args, "set thread default run") ? 0 : 1; |
| 2576 | } |
| 2577 | |
| 2578 | static void |
| 2579 | show_thread_default_run_cmd (char *args, int from_tty) |
| 2580 | { |
| 2581 | struct inf *inf = cur_inf (); |
| 2582 | check_empty (args, "show thread default run"); |
| 2583 | printf_unfiltered ("New threads %s allowed to run.\n", |
| 2584 | inf->default_thread_run_sc == 0 ? "are" : "aren't"); |
| 2585 | } |
| 2586 | |
| 2587 | static void |
| 2588 | set_thread_default_detach_sc_cmd (char *args, int from_tty) |
| 2589 | { |
| 2590 | cur_inf ()->default_thread_detach_sc = |
| 2591 | parse_int_arg (args, "set thread default detach-suspend-count"); |
| 2592 | } |
| 2593 | |
| 2594 | static void |
| 2595 | show_thread_default_detach_sc_cmd (char *args, int from_tty) |
| 2596 | { |
| 2597 | check_empty (args, "show thread default detach-suspend-count"); |
| 2598 | printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n", |
| 2599 | cur_inf ()->default_thread_detach_sc); |
| 2600 | } |
| 2601 | \f |
| 2602 | /* Steal a send right called NAME in the inferior task, and make it PROC's |
| 2603 | saved exception port. */ |
| 2604 | static void |
| 2605 | steal_exc_port (struct proc *proc, mach_port_t name) |
| 2606 | { |
| 2607 | error_t err; |
| 2608 | mach_port_t port; |
| 2609 | mach_msg_type_name_t port_type; |
| 2610 | |
| 2611 | if (!proc || !proc->inf->task) |
| 2612 | error ("No inferior task."); |
| 2613 | |
| 2614 | err = mach_port_extract_right (proc->inf->task->port, |
| 2615 | name, MACH_MSG_TYPE_COPY_SEND, |
| 2616 | &port, &port_type); |
| 2617 | if (err) |
| 2618 | error ("Couldn't extract send right %d from inferior: %s", |
| 2619 | name, strerror (err)); |
| 2620 | |
| 2621 | if (proc->saved_exc_port) |
| 2622 | /* Get rid of our reference to the old one. */ |
| 2623 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| 2624 | |
| 2625 | proc->saved_exc_port = port; |
| 2626 | |
| 2627 | if (! proc->exc_port) |
| 2628 | /* If PROC is a thread, we may not have set its exception port before. |
| 2629 | We can't use proc_steal_exc_port because it also sets saved_exc_port. */ |
| 2630 | { |
| 2631 | proc->exc_port = proc->inf->event_port; |
| 2632 | err = proc_set_exception_port (proc, proc->exc_port); |
| 2633 | error ("Can't set exception port for %s: %s", |
| 2634 | proc_string (proc), strerror (err)); |
| 2635 | } |
| 2636 | } |
| 2637 | \f |
| 2638 | static void |
| 2639 | set_task_exc_port_cmd (char *args, int from_tty) |
| 2640 | { |
| 2641 | struct inf *inf = cur_inf (); |
| 2642 | if (!args) |
| 2643 | error ("No argument to \"set task exception-port\" command."); |
| 2644 | steal_exc_port (inf->task, parse_and_eval_address (args)); |
| 2645 | } |
| 2646 | |
| 2647 | static void |
| 2648 | set_stopped_cmd (char *args, int from_tty) |
| 2649 | { |
| 2650 | cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped"); |
| 2651 | } |
| 2652 | |
| 2653 | static void |
| 2654 | show_stopped_cmd (char *args, int from_tty) |
| 2655 | { |
| 2656 | struct inf *inf = active_inf (); |
| 2657 | check_empty (args, "show stopped"); |
| 2658 | printf_unfiltered ("The inferior process %s stopped.\n", |
| 2659 | inf->stopped ? "is" : "isn't"); |
| 2660 | } |
| 2661 | |
| 2662 | static void |
| 2663 | set_sig_thread_cmd (char *args, int from_tty) |
| 2664 | { |
| 2665 | int tid; |
| 2666 | struct inf *inf = cur_inf (); |
| 2667 | |
| 2668 | if (!args || (! isdigit (*args) && strcmp (args, "none") != 0)) |
| 2669 | error ("Illegal argument to \"set signal-thread\" command.\n" |
| 2670 | "Should be an integer thread ID, or `none'."); |
| 2671 | |
| 2672 | if (strcmp (args, "none") == 0) |
| 2673 | inf->signal_thread = 0; |
| 2674 | else |
| 2675 | { |
| 2676 | int tid = thread_id_to_pid (atoi (args)); |
| 2677 | if (tid < 0) |
| 2678 | error ("Thread ID %s not known. Use the \"info threads\" command to\n" |
| 2679 | "see the IDs of currently known threads.", args); |
| 2680 | inf->signal_thread = inf_tid_to_thread (inf, tid); |
| 2681 | } |
| 2682 | } |
| 2683 | |
| 2684 | static void |
| 2685 | show_sig_thread_cmd (char *args, int from_tty) |
| 2686 | { |
| 2687 | struct inf *inf = active_inf (); |
| 2688 | check_empty (args, "show signal-thread"); |
| 2689 | if (inf->signal_thread) |
| 2690 | printf_unfiltered ("The signal thread is %s.\n", |
| 2691 | proc_string (inf->signal_thread)); |
| 2692 | else |
| 2693 | printf_unfiltered ("There is no signal thread.\n"); |
| 2694 | } |
| 2695 | \f |
| 2696 | static void |
| 2697 | set_signals_cmd (char *args, int from_tty) |
| 2698 | { |
| 2699 | int trace; |
| 2700 | struct inf *inf = cur_inf (); |
| 2701 | |
| 2702 | inf->want_signals = parse_bool_arg (args, "set signals"); |
| 2703 | |
| 2704 | if (inf->task && inf->want_signals != inf->traced) |
| 2705 | /* Make this take effect immediately in a running process. */ |
| 2706 | inf_set_traced (inf, inf->want_signals); |
| 2707 | } |
| 2708 | |
| 2709 | static void |
| 2710 | show_signals_cmd (char *args, int from_tty) |
| 2711 | { |
| 2712 | struct inf *inf = cur_inf (); |
| 2713 | check_empty (args, "show signals"); |
| 2714 | printf_unfiltered ("The inferior process's signals %s intercepted.\n", |
| 2715 | inf->task |
| 2716 | ? (inf->traced ? "are" : "aren't") |
| 2717 | : (inf->want_signals ? "will be" : "won't be")); |
| 2718 | } |
| 2719 | |
| 2720 | static void |
| 2721 | set_exceptions_cmd (char *args, int from_tty) |
| 2722 | { |
| 2723 | struct inf *inf = cur_inf (); |
| 2724 | int val = parse_bool_arg (args, "set exceptions"); |
| 2725 | |
| 2726 | if (inf->task && inf->want_exceptions != val) |
| 2727 | /* Make this take effect immediately in a running process. */ |
| 2728 | /* XXX */; |
| 2729 | |
| 2730 | inf->want_exceptions = val; |
| 2731 | } |
| 2732 | |
| 2733 | static void |
| 2734 | show_exceptions_cmd (char *args, int from_tty) |
| 2735 | { |
| 2736 | struct inf *inf = cur_inf (); |
| 2737 | check_empty (args, "show exceptions"); |
| 2738 | printf_unfiltered ("Exceptions in the inferior %s trapped.\n", |
| 2739 | inf->task |
| 2740 | ? (inf->want_exceptions ? "are" : "aren't") |
| 2741 | : (inf->want_exceptions ? "will be" : "won't be")); |
| 2742 | } |
| 2743 | \f |
| 2744 | static void |
| 2745 | set_task_cmd (char *args, int from_tty) |
| 2746 | { |
| 2747 | printf_unfiltered ("\"set task\" must be followed by the name of a task property.\n"); |
| 2748 | } |
| 2749 | |
| 2750 | static void |
| 2751 | show_task_cmd (char *args, int from_tty) |
| 2752 | { |
| 2753 | struct inf *inf = cur_inf (); |
| 2754 | |
| 2755 | check_empty (args, "show task"); |
| 2756 | |
| 2757 | show_signals_cmd (0, from_tty); |
| 2758 | show_exceptions_cmd (0, from_tty); |
| 2759 | show_task_pause_cmd (0, from_tty); |
| 2760 | |
| 2761 | if (inf->pause_sc == 0) |
| 2762 | show_thread_default_pause_cmd (0, from_tty); |
| 2763 | show_thread_default_run_cmd (0, from_tty); |
| 2764 | |
| 2765 | if (inf->task) |
| 2766 | { |
| 2767 | show_stopped_cmd (0, from_tty); |
| 2768 | show_sig_thread_cmd (0, from_tty); |
| 2769 | } |
| 2770 | |
| 2771 | if (inf->detach_sc != 0) |
| 2772 | show_task_detach_sc_cmd (0, from_tty); |
| 2773 | if (inf->default_thread_detach_sc != 0) |
| 2774 | show_thread_default_detach_sc_cmd (0, from_tty); |
| 2775 | } |
| 2776 | \f |
| 2777 | static void |
| 2778 | set_noninvasive_cmd (char *args, int from_tty) |
| 2779 | { |
| 2780 | /* Invert the sense of the arg for each component. */ |
| 2781 | char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on"; |
| 2782 | |
| 2783 | set_task_pause_cmd (inv_args, from_tty); |
| 2784 | set_signals_cmd (inv_args, from_tty); |
| 2785 | set_exceptions_cmd (inv_args, from_tty); |
| 2786 | } |
| 2787 | \f |
| 2788 | static void |
| 2789 | info_port_rights (char *args, mach_port_type_t only) |
| 2790 | { |
| 2791 | struct inf *inf = active_inf (); |
| 2792 | value_ptr vmark = value_mark (); |
| 2793 | |
| 2794 | if (args) |
| 2795 | /* Explicit list of port rights. */ |
| 2796 | { |
| 2797 | while (*args) |
| 2798 | { |
| 2799 | value_ptr val = parse_to_comma_and_eval (&args); |
| 2800 | long right = value_as_long (val); |
| 2801 | error_t err = |
| 2802 | print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS, |
| 2803 | stdout); |
| 2804 | if (err) |
| 2805 | error ("%ld: %s.", right, strerror (err)); |
| 2806 | } |
| 2807 | } |
| 2808 | else |
| 2809 | /* Print all of them. */ |
| 2810 | { |
| 2811 | error_t err = |
| 2812 | print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS, |
| 2813 | stdout); |
| 2814 | if (err) |
| 2815 | error ("%s.", strerror (err)); |
| 2816 | } |
| 2817 | |
| 2818 | value_free_to_mark (vmark); |
| 2819 | } |
| 2820 | |
| 2821 | static void |
| 2822 | info_send_rights_cmd (char *args, int from_tty) |
| 2823 | { |
| 2824 | info_port_rights (args, MACH_PORT_TYPE_SEND); |
| 2825 | } |
| 2826 | static void |
| 2827 | info_recv_rights_cmd (char *args, int from_tty) |
| 2828 | { |
| 2829 | info_port_rights (args, MACH_PORT_TYPE_RECEIVE); |
| 2830 | } |
| 2831 | static void |
| 2832 | info_port_sets_cmd (char *args, int from_tty) |
| 2833 | { |
| 2834 | info_port_rights (args, MACH_PORT_TYPE_PORT_SET); |
| 2835 | } |
| 2836 | static void |
| 2837 | info_dead_names_cmd (char *args, int from_tty) |
| 2838 | { |
| 2839 | info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME); |
| 2840 | } |
| 2841 | static void |
| 2842 | info_port_rights_cmd (char *args, int from_tty) |
| 2843 | { |
| 2844 | info_port_rights (args, ~0); |
| 2845 | } |
| 2846 | \f |
| 2847 | static void add_task_commands () |
| 2848 | { |
| 2849 | add_cmd ("pause", class_run, set_thread_default_pause_cmd, |
| 2850 | "Set whether the new threads are suspended while gdb has control.\n" |
| 2851 | "This property normally has no effect because the whole task is\n" |
| 2852 | "suspended, however, that may be disabled with \"set task pause off\".\n" |
| 2853 | "The default value is \"off\".", |
| 2854 | &set_thread_default_cmd_list); |
| 2855 | add_cmd ("pause", no_class, show_thread_default_pause_cmd, |
| 2856 | "Show whether new threads are suspended while gdb has control.", |
| 2857 | &show_thread_default_cmd_list); |
| 2858 | add_cmd ("run", class_run, set_thread_default_run_cmd, |
| 2859 | "Set whether new threads are allowed to run (once gdb has noticed them).", |
| 2860 | &set_thread_default_cmd_list); |
| 2861 | add_cmd ("run", no_class, show_thread_default_run_cmd, |
| 2862 | "Show whether new threads are allowed to run (once gdb has noticed |
| 2863 | them).", |
| 2864 | &show_thread_default_cmd_list); |
| 2865 | add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd, |
| 2866 | "Set the default detach-suspend-count value for new threads.", |
| 2867 | &set_thread_default_cmd_list); |
| 2868 | add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd, |
| 2869 | "Show the default detach-suspend-count value for new threads.", |
| 2870 | &show_thread_default_cmd_list); |
| 2871 | |
| 2872 | add_cmd ("signals", class_run, set_signals_cmd, |
| 2873 | "Set whether the inferior process's signals will be intercepted.\n" |
| 2874 | "Mach exceptions (such as breakpoint traps) are not affected.", |
| 2875 | &setlist); |
| 2876 | add_alias_cmd ("sigs", "signals", class_run, 1, &setlist); |
| 2877 | add_cmd ("signals", no_class, show_signals_cmd, |
| 2878 | "Show whether the inferior process's signals will be intercepted.", |
| 2879 | &showlist); |
| 2880 | add_alias_cmd ("sigs", "signals", no_class, 1, &showlist); |
| 2881 | |
| 2882 | add_cmd ("signal-thread", class_run, set_sig_thread_cmd, |
| 2883 | "Set the thread that gdb thinks is the libc signal thread.\n" |
| 2884 | "This thread is run when delivering a signal to a non-stopped process.", |
| 2885 | &setlist); |
| 2886 | add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist); |
| 2887 | add_cmd ("signal-thread", no_class, show_sig_thread_cmd, |
| 2888 | "Set the thread that gdb thinks is the libc signal thread.", |
| 2889 | &showlist); |
| 2890 | add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist); |
| 2891 | |
| 2892 | add_cmd ("stopped", class_run, set_stopped_cmd, |
| 2893 | "Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n" |
| 2894 | "Stopped process will be continued by sending them a signal.", |
| 2895 | &setlist); |
| 2896 | add_cmd ("stopped", no_class, show_signals_cmd, |
| 2897 | "Show whether gdb thinks the inferior process is stopped as with SIGSTOP.", |
| 2898 | &showlist); |
| 2899 | |
| 2900 | add_cmd ("exceptions", class_run, set_exceptions_cmd, |
| 2901 | "Set whether exceptions in the inferior process will be trapped.\n" |
| 2902 | "When exceptions are turned off, neither breakpoints nor single-stepping\n" |
| 2903 | "will work.", |
| 2904 | &setlist); |
| 2905 | /* Allow `set exc' despite conflict with `set exception-port'. */ |
| 2906 | add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist); |
| 2907 | add_cmd ("exceptions", no_class, show_exceptions_cmd, |
| 2908 | "Show whether exceptions in the inferior process will be trapped.", |
| 2909 | &showlist); |
| 2910 | |
| 2911 | add_prefix_cmd ("task", no_class, set_task_cmd, |
| 2912 | "Command prefix for setting task attributes.", |
| 2913 | &set_task_cmd_list, "set task ", 0, &setlist); |
| 2914 | add_prefix_cmd ("task", no_class, show_task_cmd, |
| 2915 | "Command prefix for showing task attributes.", |
| 2916 | &show_task_cmd_list, "show task ", 0, &showlist); |
| 2917 | |
| 2918 | add_cmd ("pause", class_run, set_task_pause_cmd, |
| 2919 | "Set whether the task is suspended while gdb has control.\n" |
| 2920 | "A value of \"on\" takes effect immediately, otherwise nothing\n" |
| 2921 | "happens until the next time the program is continued.\n" |
| 2922 | "When setting this to \"off\", \"set thread default pause on\"\n" |
| 2923 | "can be used to pause individual threads by default instead.", |
| 2924 | &set_task_cmd_list); |
| 2925 | add_cmd ("pause", no_class, show_task_pause_cmd, |
| 2926 | "Show whether the task is suspended while gdb has control.", |
| 2927 | &show_task_cmd_list); |
| 2928 | add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd, |
| 2929 | "Set the suspend count will leave on the thread when detaching.", |
| 2930 | &set_task_cmd_list); |
| 2931 | add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd, |
| 2932 | "Show the suspend count will leave on the thread when detaching.", |
| 2933 | &show_task_cmd_list); |
| 2934 | |
| 2935 | add_cmd ("exception-port", no_class, set_task_exc_port_cmd, |
| 2936 | "Set the task exception port to which we forward exceptions.\n" |
| 2937 | "The argument should be the value of the send right in the task.", |
| 2938 | &set_task_cmd_list); |
| 2939 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list); |
| 2940 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, &set_task_cmd_list); |
| 2941 | |
| 2942 | /* A convenient way of turning on all options require to noninvasively |
| 2943 | debug running tasks. */ |
| 2944 | add_cmd ("noninvasive", no_class, set_noninvasive_cmd, |
| 2945 | "Set task options so that we interfere as little as possible.\n" |
| 2946 | "This is the same as setting `task pause', `exceptions', and" |
| 2947 | "`signals' to the opposite value.", |
| 2948 | &setlist); |
| 2949 | |
| 2950 | /* Commands to show information about the task's ports. */ |
| 2951 | add_cmd ("send-rights", class_info, info_send_rights_cmd, |
| 2952 | "Show information about the task's send rights", |
| 2953 | &infolist); |
| 2954 | add_cmd ("receive-rights", class_info, info_recv_rights_cmd, |
| 2955 | "Show information about the task's receive rights", |
| 2956 | &infolist); |
| 2957 | add_cmd ("port-rights", class_info, info_send_rights_cmd, |
| 2958 | "Show information about the task's port rights", |
| 2959 | &infolist); |
| 2960 | add_cmd ("port-sets", class_info, info_port_sets_cmd, |
| 2961 | "Show information about the task's port sets", |
| 2962 | &infolist); |
| 2963 | add_cmd ("dead-names", class_info, info_dead_names_cmd, |
| 2964 | "Show information about the task's dead names", |
| 2965 | &infolist); |
| 2966 | add_info_alias ("ports", "port-rights", 1); |
| 2967 | add_info_alias ("port", "port-rights", 1); |
| 2968 | add_info_alias ("psets", "port-sets", 1); |
| 2969 | } |
| 2970 | \f |
| 2971 | |
| 2972 | static void |
| 2973 | set_thread_pause_cmd (char *args, int from_tty) |
| 2974 | { |
| 2975 | struct proc *thread = cur_thread (); |
| 2976 | int old_sc = thread->pause_sc; |
| 2977 | thread->pause_sc = parse_bool_arg (args, "set thread pause"); |
| 2978 | if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0) |
| 2979 | /* If the task is currently unsuspended, immediately suspend it, |
| 2980 | otherwise wait until the next time it gets control. */ |
| 2981 | inf_suspend (thread->inf); |
| 2982 | } |
| 2983 | |
| 2984 | static void |
| 2985 | show_thread_pause_cmd (char *args, int from_tty) |
| 2986 | { |
| 2987 | struct proc *thread = cur_thread (); |
| 2988 | int sc = thread->pause_sc; |
| 2989 | check_empty (args, "show task pause"); |
| 2990 | printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n", |
| 2991 | proc_string (thread), |
| 2992 | sc ? "is" : "isn't", |
| 2993 | !sc && thread->inf->pause_sc ? " (but the task is)" : ""); |
| 2994 | } |
| 2995 | |
| 2996 | static void |
| 2997 | set_thread_run_cmd (char *args, int from_tty) |
| 2998 | { |
| 2999 | struct proc *thread = cur_thread (); |
| 3000 | thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1; |
| 3001 | } |
| 3002 | |
| 3003 | static void |
| 3004 | show_thread_run_cmd (char *args, int from_tty) |
| 3005 | { |
| 3006 | struct proc *thread = cur_thread (); |
| 3007 | check_empty (args, "show thread run"); |
| 3008 | printf_unfiltered ("Thread %s %s allowed to run.", |
| 3009 | proc_string (thread), |
| 3010 | thread->run_sc == 0 ? "is" : "isn't"); |
| 3011 | } |
| 3012 | |
| 3013 | static void |
| 3014 | set_thread_detach_sc_cmd (char *args, int from_tty) |
| 3015 | { |
| 3016 | cur_thread ()->detach_sc = parse_int_arg (args, "set thread detach-suspend-count"); |
| 3017 | } |
| 3018 | |
| 3019 | static void |
| 3020 | show_thread_detach_sc_cmd (char *args, int from_tty) |
| 3021 | { |
| 3022 | struct proc *thread = cur_thread (); |
| 3023 | check_empty (args, "show thread detach-suspend-count"); |
| 3024 | printf_unfiltered ("Thread %s will be left with a suspend count of %d when detaching.\n", |
| 3025 | proc_string (thread), |
| 3026 | thread->detach_sc); |
| 3027 | } |
| 3028 | |
| 3029 | static void |
| 3030 | set_thread_exc_port_cmd (char *args, int from_tty) |
| 3031 | { |
| 3032 | struct proc *thread = cur_thread (); |
| 3033 | if (!args) |
| 3034 | error ("No argument to \"set thread exception-port\" command."); |
| 3035 | steal_exc_port (thread, parse_and_eval_address (args)); |
| 3036 | } |
| 3037 | |
| 3038 | #if 0 |
| 3039 | static void |
| 3040 | show_thread_cmd (char *args, int from_tty) |
| 3041 | { |
| 3042 | struct proc *thread = cur_thread (); |
| 3043 | check_empty (args, "show thread"); |
| 3044 | show_thread_run_cmd (0, from_tty); |
| 3045 | show_thread_pause_cmd (0, from_tty); |
| 3046 | if (thread->detach_sc != 0) |
| 3047 | show_thread_detach_sc_cmd (0, from_tty); |
| 3048 | } |
| 3049 | #endif |
| 3050 | |
| 3051 | static void |
| 3052 | thread_takeover_sc_cmd (char *args, int from_tty) |
| 3053 | { |
| 3054 | struct proc *thread = cur_thread (); |
| 3055 | thread_basic_info_data_t _info; |
| 3056 | thread_basic_info_t info = &_info; |
| 3057 | mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT; |
| 3058 | error_t err = |
| 3059 | thread_info (thread->port, THREAD_BASIC_INFO, (int *)&info, &info_len); |
| 3060 | if (err) |
| 3061 | error ("%s.", strerror (err)); |
| 3062 | thread->sc = info->suspend_count; |
| 3063 | if (from_tty) |
| 3064 | printf_unfiltered ("Suspend count was %d.\n", thread->sc); |
| 3065 | if (info != &_info) |
| 3066 | vm_deallocate (mach_task_self (), (vm_address_t)info, info_len * sizeof (int)); |
| 3067 | } |
| 3068 | |
| 3069 | add_thread_commands () |
| 3070 | { |
| 3071 | add_prefix_cmd ("thread", no_class, set_thread_cmd, |
| 3072 | "Command prefix for setting thread properties.", |
| 3073 | &set_thread_cmd_list, "set thread ", 0, &setlist); |
| 3074 | add_prefix_cmd ("default", no_class, show_thread_cmd, |
| 3075 | "Command prefix for setting default thread properties.", |
| 3076 | &set_thread_default_cmd_list, "set thread default ", 0, |
| 3077 | &set_thread_cmd_list); |
| 3078 | add_prefix_cmd ("thread", no_class, set_thread_default_cmd, |
| 3079 | "Command prefix for showing thread properties.", |
| 3080 | &show_thread_cmd_list, "show thread ", 0, &showlist); |
| 3081 | add_prefix_cmd ("default", no_class, show_thread_default_cmd, |
| 3082 | "Command prefix for showing default thread properties.", |
| 3083 | &show_thread_default_cmd_list, "show thread default ", 0, |
| 3084 | &show_thread_cmd_list); |
| 3085 | |
| 3086 | add_cmd ("pause", class_run, set_thread_pause_cmd, |
| 3087 | "Set whether the current thread is suspended while gdb has control.\n" |
| 3088 | "A value of \"on\" takes effect immediately, otherwise nothing\n" |
| 3089 | "happens until the next time the program is continued. This\n" |
| 3090 | "property normally has no effect because the whole task is suspended,\n" |
| 3091 | "however, that may be disabled with \"set task pause off\".\n" |
| 3092 | "The default value is \"off\".", |
| 3093 | &set_thread_cmd_list); |
| 3094 | add_cmd ("pause", no_class, show_thread_pause_cmd, |
| 3095 | "Show whether the current thread is suspended while gdb has control.", |
| 3096 | &show_thread_cmd_list); |
| 3097 | |
| 3098 | add_cmd ("run", class_run, set_thread_run_cmd, |
| 3099 | "Set whether the current thread is allowed to run.", |
| 3100 | &set_thread_cmd_list); |
| 3101 | add_cmd ("run", no_class, show_thread_run_cmd, |
| 3102 | "Show whether the current thread is allowed to run.", |
| 3103 | &show_thread_cmd_list); |
| 3104 | |
| 3105 | add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd, |
| 3106 | "Set the suspend count will leave on the thread when detaching.\n" |
| 3107 | "Note that this is relative to suspend count when gdb noticed the thread;\n" |
| 3108 | "use the `thread takeover-suspend-count' to force it to an absolute value.", |
| 3109 | &set_thread_cmd_list); |
| 3110 | add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd, |
| 3111 | "Show the suspend count will leave on the thread when detaching." |
| 3112 | "Note that this is relative to suspend count when gdb noticed the thread;\n" |
| 3113 | "use the `thread takeover-suspend-count' to force it to an absolute value.", |
| 3114 | &show_thread_cmd_list); |
| 3115 | |
| 3116 | add_cmd ("exception-port", no_class, set_thread_exc_port_cmd, |
| 3117 | "Set the exception port to which we forward exceptions for the\n" |
| 3118 | "current thread, overriding the task exception port.\n" |
| 3119 | "The argument should be the value of the send right in the task.", |
| 3120 | &set_thread_cmd_list); |
| 3121 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list); |
| 3122 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, &set_thread_cmd_list); |
| 3123 | |
| 3124 | add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd, |
| 3125 | "Force the threads absolute suspend-count to be gdb's.\n" |
| 3126 | "Prior to giving this command, gdb's thread suspend-counts are relative to\n" |
| 3127 | "the thread's initial suspend-count when gdb notices the threads.", |
| 3128 | &thread_cmd_list); |
| 3129 | } |
| 3130 | \f |
| 3131 | void |
| 3132 | _initialize_gnu_nat () |
| 3133 | { |
| 3134 | proc_server = getproc (); |
| 3135 | |
| 3136 | add_target (&gnu_ops); |
| 3137 | |
| 3138 | add_task_commands (); |
| 3139 | add_thread_commands (); |
| 3140 | |
| 3141 | #if MAINTENANCE_CMDS |
| 3142 | add_set_cmd ("gnu-debug", class_maintenance, |
| 3143 | var_boolean, (char *)&gnu_debug_flag, |
| 3144 | "Set debugging output for the gnu backend.", &maintenancelist); |
| 3145 | #endif |
| 3146 | } |
| 3147 | \f |
| 3148 | #ifdef FLUSH_INFERIOR_CACHE |
| 3149 | |
| 3150 | /* When over-writing code on some machines the I-Cache must be flushed |
| 3151 | explicitly, because it is not kept coherent by the lazy hardware. |
| 3152 | This definitely includes breakpoints, for instance, or else we |
| 3153 | end up looping in mysterious Bpt traps */ |
| 3154 | |
| 3155 | void |
| 3156 | flush_inferior_icache(pc, amount) |
| 3157 | CORE_ADDR pc; |
| 3158 | { |
| 3159 | vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH; |
| 3160 | error_t ret; |
| 3161 | |
| 3162 | ret = vm_machine_attribute (current_inferior->task->port, |
| 3163 | pc, |
| 3164 | amount, |
| 3165 | MATTR_CACHE, |
| 3166 | &flush); |
| 3167 | if (ret != KERN_SUCCESS) |
| 3168 | warning ("Error flushing inferior's cache : %s", strerror (ret)); |
| 3169 | } |
| 3170 | #endif FLUSH_INFERIOR_CACHE |