| 1 | /* Darwin support for GDB, the GNU debugger. |
| 2 | Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
| 3 | |
| 4 | Contributed by AdaCore. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "top.h" |
| 24 | #include "inferior.h" |
| 25 | #include "target.h" |
| 26 | #include "symfile.h" |
| 27 | #include "symtab.h" |
| 28 | #include "objfiles.h" |
| 29 | #include "gdb.h" |
| 30 | #include "gdbcmd.h" |
| 31 | #include "gdbcore.h" |
| 32 | #include "gdbthread.h" |
| 33 | #include "regcache.h" |
| 34 | #include "event-top.h" |
| 35 | #include "inf-loop.h" |
| 36 | #include "gdb_stat.h" |
| 37 | #include "exceptions.h" |
| 38 | #include "inf-child.h" |
| 39 | #include "value.h" |
| 40 | #include "arch-utils.h" |
| 41 | #include "bfd.h" |
| 42 | |
| 43 | #include <sys/ptrace.h> |
| 44 | #include <sys/signal.h> |
| 45 | #include <machine/setjmp.h> |
| 46 | #include <sys/types.h> |
| 47 | #include <unistd.h> |
| 48 | #include <signal.h> |
| 49 | #include <string.h> |
| 50 | #include <ctype.h> |
| 51 | #include <sys/param.h> |
| 52 | #include <sys/sysctl.h> |
| 53 | #include <sys/proc.h> |
| 54 | #include <libproc.h> |
| 55 | #include <sys/syscall.h> |
| 56 | |
| 57 | #include <mach/mach_error.h> |
| 58 | #include <mach/mach_vm.h> |
| 59 | #include <mach/mach_init.h> |
| 60 | #include <mach/vm_map.h> |
| 61 | #include <mach/task.h> |
| 62 | #include <mach/mach_port.h> |
| 63 | #include <mach/thread_act.h> |
| 64 | #include <mach/port.h> |
| 65 | |
| 66 | #include "darwin-nat.h" |
| 67 | |
| 68 | /* Quick overview. |
| 69 | Darwin kernel is Mach + BSD derived kernel. Note that they share the |
| 70 | same memory space and are linked together (ie there is no micro-kernel). |
| 71 | |
| 72 | Although ptrace(2) is available on Darwin, it is not complete. We have |
| 73 | to use Mach calls to read and write memory and to modify registers. We |
| 74 | also use Mach to get inferior faults. As we cannot use select(2) or |
| 75 | signals with Mach port (the Mach communication channel), signals are |
| 76 | reported to gdb as an exception. Furthermore we detect death of the |
| 77 | inferior through a Mach notification message. This way we only wait |
| 78 | on Mach ports. |
| 79 | |
| 80 | Some Mach documentation is available for Apple xnu source package or |
| 81 | from the web. */ |
| 82 | |
| 83 | |
| 84 | #define PTRACE(CMD, PID, ADDR, SIG) \ |
| 85 | darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG)) |
| 86 | |
| 87 | extern boolean_t exc_server (mach_msg_header_t *in, mach_msg_header_t *out); |
| 88 | |
| 89 | static void darwin_stop (ptid_t); |
| 90 | |
| 91 | static void darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, |
| 92 | enum target_signal signal); |
| 93 | static void darwin_resume (ptid_t ptid, int step, |
| 94 | enum target_signal signal); |
| 95 | |
| 96 | static ptid_t darwin_wait_to (struct target_ops *ops, ptid_t ptid, |
| 97 | struct target_waitstatus *status, int options); |
| 98 | static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status); |
| 99 | |
| 100 | static void darwin_mourn_inferior (struct target_ops *ops); |
| 101 | |
| 102 | static void darwin_kill_inferior (struct target_ops *ops); |
| 103 | |
| 104 | static void darwin_ptrace_me (void); |
| 105 | |
| 106 | static void darwin_ptrace_him (int pid); |
| 107 | |
| 108 | static void darwin_create_inferior (struct target_ops *ops, char *exec_file, |
| 109 | char *allargs, char **env, int from_tty); |
| 110 | |
| 111 | static void darwin_files_info (struct target_ops *ops); |
| 112 | |
| 113 | static char *darwin_pid_to_str (struct target_ops *ops, ptid_t tpid); |
| 114 | |
| 115 | static int darwin_thread_alive (struct target_ops *ops, ptid_t tpid); |
| 116 | |
| 117 | /* Target operations for Darwin. */ |
| 118 | static struct target_ops *darwin_ops; |
| 119 | |
| 120 | /* Task identifier of gdb. */ |
| 121 | static task_t gdb_task; |
| 122 | |
| 123 | /* A copy of mach_host_self (). */ |
| 124 | mach_port_t darwin_host_self; |
| 125 | |
| 126 | /* Exception port. */ |
| 127 | mach_port_t darwin_ex_port; |
| 128 | |
| 129 | /* Port set. */ |
| 130 | mach_port_t darwin_port_set; |
| 131 | |
| 132 | /* Page size. */ |
| 133 | static vm_size_t mach_page_size; |
| 134 | |
| 135 | /* If Set, catch all mach exceptions (before they are converted to signals |
| 136 | by the kernel). */ |
| 137 | static int enable_mach_exceptions; |
| 138 | |
| 139 | /* Inferior that should report a fake stop event. */ |
| 140 | static struct inferior *darwin_inf_fake_stop; |
| 141 | |
| 142 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
| 143 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) |
| 144 | |
| 145 | /* This controls output of inferior debugging. */ |
| 146 | static int darwin_debug_flag = 0; |
| 147 | |
| 148 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
| 149 | be signed. This is required to get an authorization for task_for_pid. |
| 150 | |
| 151 | Once gdb is built, you can either: |
| 152 | * make it setgid procmod |
| 153 | * or codesign it with any system-trusted signing authority. |
| 154 | See taskgated(8) for details. */ |
| 155 | static const unsigned char info_plist[] |
| 156 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = |
| 157 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" |
| 158 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" |
| 159 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" |
| 160 | "<plist version=\"1.0\">\n" |
| 161 | "<dict>\n" |
| 162 | " <key>CFBundleIdentifier</key>\n" |
| 163 | " <string>org.gnu.gdb</string>\n" |
| 164 | " <key>CFBundleName</key>\n" |
| 165 | " <string>gdb</string>\n" |
| 166 | " <key>CFBundleVersion</key>\n" |
| 167 | " <string>1.0</string>\n" |
| 168 | " <key>SecTaskAccess</key>\n" |
| 169 | " <array>\n" |
| 170 | " <string>allowed</string>\n" |
| 171 | " <string>debug</string>\n" |
| 172 | " </array>\n" |
| 173 | "</dict>\n" |
| 174 | "</plist>\n"; |
| 175 | |
| 176 | static void |
| 177 | inferior_debug (int level, const char *fmt, ...) |
| 178 | { |
| 179 | va_list ap; |
| 180 | |
| 181 | if (darwin_debug_flag < level) |
| 182 | return; |
| 183 | |
| 184 | va_start (ap, fmt); |
| 185 | printf_unfiltered (_("[%d inferior]: "), getpid ()); |
| 186 | vprintf_unfiltered (fmt, ap); |
| 187 | va_end (ap); |
| 188 | } |
| 189 | |
| 190 | void |
| 191 | mach_check_error (kern_return_t ret, const char *file, |
| 192 | unsigned int line, const char *func) |
| 193 | { |
| 194 | if (ret == KERN_SUCCESS) |
| 195 | return; |
| 196 | if (func == NULL) |
| 197 | func = _("[UNKNOWN]"); |
| 198 | |
| 199 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)\n"), |
| 200 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
| 201 | } |
| 202 | |
| 203 | static const char * |
| 204 | unparse_exception_type (unsigned int i) |
| 205 | { |
| 206 | static char unknown_exception_buf[32]; |
| 207 | |
| 208 | switch (i) |
| 209 | { |
| 210 | case EXC_BAD_ACCESS: |
| 211 | return "EXC_BAD_ACCESS"; |
| 212 | case EXC_BAD_INSTRUCTION: |
| 213 | return "EXC_BAD_INSTRUCTION"; |
| 214 | case EXC_ARITHMETIC: |
| 215 | return "EXC_ARITHMETIC"; |
| 216 | case EXC_EMULATION: |
| 217 | return "EXC_EMULATION"; |
| 218 | case EXC_SOFTWARE: |
| 219 | return "EXC_SOFTWARE"; |
| 220 | case EXC_BREAKPOINT: |
| 221 | return "EXC_BREAKPOINT"; |
| 222 | case EXC_SYSCALL: |
| 223 | return "EXC_SYSCALL"; |
| 224 | case EXC_MACH_SYSCALL: |
| 225 | return "EXC_MACH_SYSCALL"; |
| 226 | case EXC_RPC_ALERT: |
| 227 | return "EXC_RPC_ALERT"; |
| 228 | case EXC_CRASH: |
| 229 | return "EXC_CRASH"; |
| 230 | default: |
| 231 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); |
| 232 | return unknown_exception_buf; |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | static int |
| 237 | darwin_ptrace (const char *name, |
| 238 | int request, int pid, PTRACE_TYPE_ARG3 arg3, int arg4) |
| 239 | { |
| 240 | int ret; |
| 241 | |
| 242 | ret = ptrace (request, pid, (caddr_t) arg3, arg4); |
| 243 | |
| 244 | inferior_debug (4, _("ptrace (%s, %d, 0x%x, %d): %d (%s)\n"), |
| 245 | name, pid, arg3, arg4, ret, |
| 246 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
| 247 | return ret; |
| 248 | } |
| 249 | |
| 250 | static int |
| 251 | cmp_thread_t (const void *l, const void *r) |
| 252 | { |
| 253 | thread_t tl = *(const thread_t *)l; |
| 254 | thread_t tr = *(const thread_t *)r; |
| 255 | return (int)(tl - tr); |
| 256 | } |
| 257 | |
| 258 | static void |
| 259 | darwin_check_new_threads (struct inferior *inf) |
| 260 | { |
| 261 | kern_return_t kret; |
| 262 | unsigned int i; |
| 263 | thread_array_t thread_list; |
| 264 | unsigned int new_nbr; |
| 265 | unsigned int old_nbr; |
| 266 | unsigned int new_ix, old_ix; |
| 267 | darwin_inferior *darwin_inf = inf->private; |
| 268 | VEC (darwin_thread_t) *thread_vec; |
| 269 | |
| 270 | /* Get list of threads. */ |
| 271 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
| 272 | MACH_CHECK_ERROR (kret); |
| 273 | if (kret != KERN_SUCCESS) |
| 274 | return; |
| 275 | |
| 276 | /* Sort the list. */ |
| 277 | if (new_nbr > 1) |
| 278 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); |
| 279 | |
| 280 | if (darwin_inf->threads) |
| 281 | old_nbr = VEC_length (darwin_thread_t, darwin_inf->threads); |
| 282 | else |
| 283 | old_nbr = 0; |
| 284 | |
| 285 | /* Quick check for no changes. */ |
| 286 | if (old_nbr == new_nbr) |
| 287 | { |
| 288 | for (i = 0; i < new_nbr; i++) |
| 289 | if (thread_list[i] |
| 290 | != VEC_index (darwin_thread_t, darwin_inf->threads, i)->gdb_port) |
| 291 | break; |
| 292 | if (i == new_nbr) |
| 293 | { |
| 294 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
| 295 | new_nbr * sizeof (int)); |
| 296 | MACH_CHECK_ERROR (kret); |
| 297 | return; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | thread_vec = VEC_alloc (darwin_thread_t, new_nbr); |
| 302 | |
| 303 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
| 304 | { |
| 305 | thread_t new_id = (new_ix < new_nbr) ? |
| 306 | thread_list[new_ix] : THREAD_NULL; |
| 307 | darwin_thread_t *old = (old_ix < old_nbr) ? |
| 308 | VEC_index (darwin_thread_t, darwin_inf->threads, old_ix) : NULL; |
| 309 | thread_t old_id = old ? old->gdb_port : THREAD_NULL; |
| 310 | |
| 311 | inferior_debug |
| 312 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:%x old_id:%x\n"), |
| 313 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
| 314 | |
| 315 | if (old_id == new_id) |
| 316 | { |
| 317 | /* Thread still exist. */ |
| 318 | VEC_safe_push (darwin_thread_t, thread_vec, old); |
| 319 | new_ix++; |
| 320 | old_ix++; |
| 321 | |
| 322 | kret = mach_port_deallocate (gdb_task, old_id); |
| 323 | MACH_CHECK_ERROR (kret); |
| 324 | continue; |
| 325 | } |
| 326 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
| 327 | { |
| 328 | /* Ignore dead ports. |
| 329 | In some weird cases, we might get dead ports. They should |
| 330 | correspond to dead thread so they could safely be ignored. */ |
| 331 | new_ix++; |
| 332 | continue; |
| 333 | } |
| 334 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) |
| 335 | { |
| 336 | /* A thread was created. */ |
| 337 | struct thread_info *tp; |
| 338 | struct private_thread_info *pti; |
| 339 | |
| 340 | pti = XZALLOC (struct private_thread_info); |
| 341 | pti->gdb_port = new_id; |
| 342 | pti->msg_state = DARWIN_RUNNING; |
| 343 | |
| 344 | /* Add a new thread unless this is the first one ever met. */ |
| 345 | if (!(old_nbr == 0 && new_ix == 0)) |
| 346 | tp = add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti); |
| 347 | else |
| 348 | { |
| 349 | tp = find_thread_ptid (ptid_build (inf->pid, 0, 0)); |
| 350 | gdb_assert (tp); |
| 351 | tp->private = pti; |
| 352 | } |
| 353 | VEC_safe_push (darwin_thread_t, thread_vec, pti); |
| 354 | new_ix++; |
| 355 | continue; |
| 356 | } |
| 357 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
| 358 | { |
| 359 | /* A thread was removed. */ |
| 360 | delete_thread (ptid_build (inf->pid, 0, old_id)); |
| 361 | kret = mach_port_deallocate (gdb_task, old_id); |
| 362 | MACH_CHECK_ERROR (kret); |
| 363 | old_ix++; |
| 364 | continue; |
| 365 | } |
| 366 | gdb_assert_not_reached ("unexpected thread case"); |
| 367 | } |
| 368 | |
| 369 | if (darwin_inf->threads) |
| 370 | VEC_free (darwin_thread_t, darwin_inf->threads); |
| 371 | darwin_inf->threads = thread_vec; |
| 372 | |
| 373 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
| 374 | new_nbr * sizeof (int)); |
| 375 | MACH_CHECK_ERROR (kret); |
| 376 | } |
| 377 | |
| 378 | static int |
| 379 | find_inferior_task_it (struct inferior *inf, void *port_ptr) |
| 380 | { |
| 381 | return inf->private->task == *(task_t*)port_ptr; |
| 382 | } |
| 383 | |
| 384 | static int |
| 385 | find_inferior_notify_it (struct inferior *inf, void *port_ptr) |
| 386 | { |
| 387 | return inf->private->notify_port == *(task_t*)port_ptr; |
| 388 | } |
| 389 | |
| 390 | /* Return an inferior by task port. */ |
| 391 | static struct inferior * |
| 392 | darwin_find_inferior_by_task (task_t port) |
| 393 | { |
| 394 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
| 395 | } |
| 396 | |
| 397 | /* Return an inferior by notification port. */ |
| 398 | static struct inferior * |
| 399 | darwin_find_inferior_by_notify (mach_port_t port) |
| 400 | { |
| 401 | return iterate_over_inferiors (&find_inferior_notify_it, &port); |
| 402 | } |
| 403 | |
| 404 | /* Return a thread by port. */ |
| 405 | static darwin_thread_t * |
| 406 | darwin_find_thread (struct inferior *inf, thread_t thread) |
| 407 | { |
| 408 | darwin_thread_t *t; |
| 409 | int k; |
| 410 | |
| 411 | for (k = 0; |
| 412 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); |
| 413 | k++) |
| 414 | if (t->gdb_port == thread) |
| 415 | return t; |
| 416 | return NULL; |
| 417 | } |
| 418 | |
| 419 | /* Suspend (ie stop) an inferior at Mach level. */ |
| 420 | |
| 421 | static void |
| 422 | darwin_suspend_inferior (struct inferior *inf) |
| 423 | { |
| 424 | if (!inf->private->suspended) |
| 425 | { |
| 426 | kern_return_t kret; |
| 427 | |
| 428 | kret = task_suspend (inf->private->task); |
| 429 | MACH_CHECK_ERROR (kret); |
| 430 | |
| 431 | inf->private->suspended = 1; |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | /* Resume an inferior at Mach level. */ |
| 436 | |
| 437 | static void |
| 438 | darwin_resume_inferior (struct inferior *inf) |
| 439 | { |
| 440 | if (inf->private->suspended) |
| 441 | { |
| 442 | kern_return_t kret; |
| 443 | |
| 444 | kret = task_resume (inf->private->task); |
| 445 | MACH_CHECK_ERROR (kret); |
| 446 | |
| 447 | inf->private->suspended = 0; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | /* Iterator functions. */ |
| 452 | |
| 453 | static int |
| 454 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) |
| 455 | { |
| 456 | darwin_suspend_inferior (inf); |
| 457 | darwin_check_new_threads (inf); |
| 458 | return 0; |
| 459 | } |
| 460 | |
| 461 | static int |
| 462 | darwin_resume_inferior_it (struct inferior *inf, void *arg) |
| 463 | { |
| 464 | darwin_resume_inferior (inf); |
| 465 | return 0; |
| 466 | } |
| 467 | |
| 468 | static void |
| 469 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) |
| 470 | { |
| 471 | printf_unfiltered (_("message header:\n")); |
| 472 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); |
| 473 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); |
| 474 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); |
| 475 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); |
| 476 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); |
| 477 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); |
| 478 | |
| 479 | if (disp_body) |
| 480 | { |
| 481 | const unsigned char *data; |
| 482 | const unsigned long *ldata; |
| 483 | int size; |
| 484 | int i; |
| 485 | |
| 486 | data = (unsigned char *)(hdr + 1); |
| 487 | size = hdr->msgh_size - sizeof (mach_msg_header_t); |
| 488 | |
| 489 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) |
| 490 | { |
| 491 | mach_msg_body_t *bod = (mach_msg_body_t*)data; |
| 492 | mach_msg_port_descriptor_t *desc = |
| 493 | (mach_msg_port_descriptor_t *)(bod + 1); |
| 494 | int k; |
| 495 | NDR_record_t *ndr; |
| 496 | printf_unfiltered (_("body: descriptor_count=%u\n"), |
| 497 | bod->msgh_descriptor_count); |
| 498 | data += sizeof (mach_msg_body_t); |
| 499 | size -= sizeof (mach_msg_body_t); |
| 500 | for (k = 0; k < bod->msgh_descriptor_count; k++) |
| 501 | switch (desc[k].type) |
| 502 | { |
| 503 | case MACH_MSG_PORT_DESCRIPTOR: |
| 504 | printf_unfiltered |
| 505 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), |
| 506 | k, desc[k].type, desc[k].name, desc[k].disposition); |
| 507 | break; |
| 508 | default: |
| 509 | printf_unfiltered (_(" descr %d: type=%u\n"), |
| 510 | k, desc[k].type); |
| 511 | break; |
| 512 | } |
| 513 | data += bod->msgh_descriptor_count |
| 514 | * sizeof (mach_msg_port_descriptor_t); |
| 515 | size -= bod->msgh_descriptor_count |
| 516 | * sizeof (mach_msg_port_descriptor_t); |
| 517 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); |
| 518 | printf_unfiltered |
| 519 | (_("NDR: mig=%02x if=%02x encod=%02x " |
| 520 | "int=%02x char=%02x float=%02x\n"), |
| 521 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, |
| 522 | ndr->int_rep, ndr->char_rep, ndr->float_rep); |
| 523 | data += sizeof (NDR_record_t); |
| 524 | size -= sizeof (NDR_record_t); |
| 525 | } |
| 526 | |
| 527 | printf_unfiltered (_(" data:")); |
| 528 | ldata = (const unsigned long *)data; |
| 529 | for (i = 0; i < size / sizeof (unsigned long); i++) |
| 530 | printf_unfiltered (" %08lx", ldata[i]); |
| 531 | printf_unfiltered (_("\n")); |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | static int |
| 536 | darwin_decode_exception_message (mach_msg_header_t *hdr, |
| 537 | struct inferior **pinf, |
| 538 | darwin_thread_t **pthread) |
| 539 | { |
| 540 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
| 541 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); |
| 542 | NDR_record_t *ndr; |
| 543 | integer_t *data; |
| 544 | struct inferior *inf; |
| 545 | darwin_thread_t *thread; |
| 546 | task_t task_port; |
| 547 | thread_t thread_port; |
| 548 | kern_return_t kret; |
| 549 | int i; |
| 550 | |
| 551 | /* Check message identifier. 2401 is exc. */ |
| 552 | if (hdr->msgh_id != 2401) |
| 553 | return -1; |
| 554 | |
| 555 | /* Check message header. */ |
| 556 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) |
| 557 | return -1; |
| 558 | |
| 559 | /* Check descriptors. */ |
| 560 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) |
| 561 | + sizeof (*ndr) + 2 * sizeof (integer_t)) |
| 562 | || bod->msgh_descriptor_count != 2 |
| 563 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR |
| 564 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND |
| 565 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR |
| 566 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) |
| 567 | return -1; |
| 568 | |
| 569 | /* Check data representation. */ |
| 570 | ndr = (NDR_record_t *)(desc + 2); |
| 571 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 |
| 572 | || ndr->if_vers != NDR_PROTOCOL_2_0 |
| 573 | || ndr->mig_encoding != NDR_record.mig_encoding |
| 574 | || ndr->int_rep != NDR_record.int_rep |
| 575 | || ndr->char_rep != NDR_record.char_rep |
| 576 | || ndr->float_rep != NDR_record.float_rep) |
| 577 | return -1; |
| 578 | |
| 579 | /* Ok, the hard work. */ |
| 580 | data = (integer_t *)(ndr + 1); |
| 581 | |
| 582 | /* Find process by port. */ |
| 583 | task_port = desc[1].name; |
| 584 | thread_port = desc[0].name; |
| 585 | inf = darwin_find_inferior_by_task (task_port); |
| 586 | if (inf == NULL) |
| 587 | return -1; |
| 588 | *pinf = inf; |
| 589 | |
| 590 | /* Find thread by port. */ |
| 591 | /* Check for new threads. Do it early so that the port in the exception |
| 592 | message can be deallocated. */ |
| 593 | darwin_check_new_threads (inf); |
| 594 | |
| 595 | /* We got new rights to the task and the thread. Get rid of them. */ |
| 596 | kret = mach_port_deallocate (mach_task_self (), task_port); |
| 597 | MACH_CHECK_ERROR (kret); |
| 598 | kret = mach_port_deallocate (mach_task_self (), thread_port); |
| 599 | MACH_CHECK_ERROR (kret); |
| 600 | |
| 601 | thread = darwin_find_thread (inf, thread_port); |
| 602 | if (thread == NULL) |
| 603 | return -1; |
| 604 | *pthread = thread; |
| 605 | |
| 606 | /* Finish decoding. */ |
| 607 | gdb_assert (thread->msg_state == DARWIN_RUNNING); |
| 608 | thread->event.header = *hdr; |
| 609 | thread->event.thread_port = thread_port; |
| 610 | thread->event.task_port = task_port; |
| 611 | thread->event.ex_type = data[0]; |
| 612 | thread->event.data_count = data[1]; |
| 613 | |
| 614 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) |
| 615 | + sizeof (*ndr) + 2 * sizeof (integer_t) |
| 616 | + data[1] * sizeof (integer_t))) |
| 617 | return -1; |
| 618 | for (i = 0; i < data[1]; i++) |
| 619 | thread->event.ex_data[i] = data[2 + i]; |
| 620 | |
| 621 | thread->msg_state = DARWIN_MESSAGE; |
| 622 | |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | static void |
| 627 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, |
| 628 | integer_t code) |
| 629 | { |
| 630 | mach_msg_header_t *rh = &reply->Head; |
| 631 | rh->msgh_bits = MACH_MSGH_BITS(MACH_MSGH_BITS_REMOTE(hdr->msgh_bits), 0); |
| 632 | rh->msgh_remote_port = hdr->msgh_remote_port; |
| 633 | rh->msgh_size = (mach_msg_size_t)sizeof(mig_reply_error_t); |
| 634 | rh->msgh_local_port = MACH_PORT_NULL; |
| 635 | rh->msgh_id = hdr->msgh_id + 100; |
| 636 | |
| 637 | reply->NDR = NDR_record; |
| 638 | reply->RetCode = code; |
| 639 | } |
| 640 | |
| 641 | static void |
| 642 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) |
| 643 | { |
| 644 | kern_return_t kret; |
| 645 | mig_reply_error_t reply; |
| 646 | |
| 647 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
| 648 | |
| 649 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, |
| 650 | reply.Head.msgh_size, 0, |
| 651 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, |
| 652 | MACH_PORT_NULL); |
| 653 | MACH_CHECK_ERROR (kret); |
| 654 | |
| 655 | inf->private->pending_messages--; |
| 656 | } |
| 657 | |
| 658 | static void |
| 659 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, |
| 660 | int step, int nsignal) |
| 661 | { |
| 662 | kern_return_t kret; |
| 663 | int res; |
| 664 | |
| 665 | inferior_debug |
| 666 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
| 667 | thread->msg_state, thread->gdb_port, step, nsignal); |
| 668 | |
| 669 | switch (thread->msg_state) |
| 670 | { |
| 671 | case DARWIN_MESSAGE: |
| 672 | if (thread->event.ex_type == EXC_SOFTWARE |
| 673 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
| 674 | { |
| 675 | /* Either deliver a new signal or cancel the signal received. */ |
| 676 | res = PTRACE (PT_THUPDATE, inf->pid, |
| 677 | (void *)(uintptr_t)thread->gdb_port, nsignal); |
| 678 | if (res < 0) |
| 679 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); |
| 680 | } |
| 681 | else if (nsignal) |
| 682 | { |
| 683 | /* Note: ptrace is allowed only if the process is stopped. |
| 684 | Directly send the signal to the thread. */ |
| 685 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); |
| 686 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), |
| 687 | thread->gdb_port, nsignal, res); |
| 688 | thread->signaled = 1; |
| 689 | } |
| 690 | |
| 691 | /* Set single step. */ |
| 692 | inferior_debug (4, _("darwin_set_sstep (thread=%x, enable=%d)\n"), |
| 693 | thread->gdb_port, step); |
| 694 | darwin_set_sstep (thread->gdb_port, step); |
| 695 | thread->single_step = step; |
| 696 | |
| 697 | darwin_send_reply (inf, thread); |
| 698 | thread->msg_state = DARWIN_RUNNING; |
| 699 | break; |
| 700 | |
| 701 | case DARWIN_RUNNING: |
| 702 | break; |
| 703 | |
| 704 | case DARWIN_STOPPED: |
| 705 | kret = thread_resume (thread->gdb_port); |
| 706 | MACH_CHECK_ERROR (kret); |
| 707 | |
| 708 | thread->msg_state = DARWIN_RUNNING; |
| 709 | break; |
| 710 | } |
| 711 | } |
| 712 | |
| 713 | /* Resume all threads of the inferior. */ |
| 714 | |
| 715 | static void |
| 716 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) |
| 717 | { |
| 718 | darwin_thread_t *thread; |
| 719 | int k; |
| 720 | |
| 721 | for (k = 0; |
| 722 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); |
| 723 | k++) |
| 724 | darwin_resume_thread (inf, thread, step, nsignal); |
| 725 | } |
| 726 | |
| 727 | struct resume_inferior_threads_param |
| 728 | { |
| 729 | int step; |
| 730 | int nsignal; |
| 731 | }; |
| 732 | |
| 733 | static int |
| 734 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) |
| 735 | { |
| 736 | int step = ((struct resume_inferior_threads_param *)param)->step; |
| 737 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; |
| 738 | |
| 739 | darwin_resume_inferior_threads (inf, step, nsignal); |
| 740 | |
| 741 | return 0; |
| 742 | } |
| 743 | |
| 744 | /* Suspend all threads of INF. */ |
| 745 | |
| 746 | static void |
| 747 | darwin_suspend_inferior_threads (struct inferior *inf) |
| 748 | { |
| 749 | darwin_thread_t *thread; |
| 750 | kern_return_t kret; |
| 751 | int k; |
| 752 | |
| 753 | for (k = 0; |
| 754 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); |
| 755 | k++) |
| 756 | switch (thread->msg_state) |
| 757 | { |
| 758 | case DARWIN_STOPPED: |
| 759 | case DARWIN_MESSAGE: |
| 760 | break; |
| 761 | case DARWIN_RUNNING: |
| 762 | kret = thread_suspend (thread->gdb_port); |
| 763 | MACH_CHECK_ERROR (kret); |
| 764 | thread->msg_state = DARWIN_STOPPED; |
| 765 | break; |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | static void |
| 770 | darwin_resume (ptid_t ptid, int step, enum target_signal signal) |
| 771 | { |
| 772 | struct target_waitstatus status; |
| 773 | int pid; |
| 774 | |
| 775 | kern_return_t kret; |
| 776 | int res; |
| 777 | int nsignal; |
| 778 | struct inferior *inf; |
| 779 | |
| 780 | inferior_debug |
| 781 | (2, _("darwin_resume: pid=%d, tid=0x%x, step=%d, signal=%d\n"), |
| 782 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); |
| 783 | |
| 784 | if (signal == TARGET_SIGNAL_0) |
| 785 | nsignal = 0; |
| 786 | else |
| 787 | nsignal = target_signal_to_host (signal); |
| 788 | |
| 789 | /* Don't try to single step all threads. */ |
| 790 | if (step) |
| 791 | ptid = inferior_ptid; |
| 792 | |
| 793 | /* minus_one_ptid is RESUME_ALL. */ |
| 794 | if (ptid_equal (ptid, minus_one_ptid)) |
| 795 | { |
| 796 | struct resume_inferior_threads_param param; |
| 797 | |
| 798 | param.nsignal = nsignal; |
| 799 | param.step = step; |
| 800 | |
| 801 | /* Resume threads. */ |
| 802 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); |
| 803 | /* Resume tasks. */ |
| 804 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); |
| 805 | } |
| 806 | else |
| 807 | { |
| 808 | struct inferior *inf = find_inferior_pid (ptid_get_pid (ptid)); |
| 809 | long tid = ptid_get_tid (ptid); |
| 810 | |
| 811 | /* Stop the inferior (should be useless). */ |
| 812 | darwin_suspend_inferior (inf); |
| 813 | |
| 814 | if (tid == 0) |
| 815 | darwin_resume_inferior_threads (inf, step, nsignal); |
| 816 | else |
| 817 | { |
| 818 | darwin_thread_t *thread; |
| 819 | |
| 820 | /* Suspend threads of the task. */ |
| 821 | darwin_suspend_inferior_threads (inf); |
| 822 | |
| 823 | /* Resume the selected thread. */ |
| 824 | thread = darwin_find_thread (inf, tid); |
| 825 | gdb_assert (thread); |
| 826 | darwin_resume_thread (inf, thread, step, nsignal); |
| 827 | } |
| 828 | |
| 829 | /* Resume the task. */ |
| 830 | darwin_resume_inferior (inf); |
| 831 | } |
| 832 | } |
| 833 | |
| 834 | static void |
| 835 | darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, |
| 836 | enum target_signal signal) |
| 837 | { |
| 838 | return darwin_resume (ptid, step, signal); |
| 839 | } |
| 840 | |
| 841 | static ptid_t |
| 842 | darwin_decode_message (mach_msg_header_t *hdr, |
| 843 | darwin_thread_t **pthread, |
| 844 | struct inferior **pinf, |
| 845 | struct target_waitstatus *status) |
| 846 | { |
| 847 | darwin_thread_t *thread; |
| 848 | struct inferior *inf; |
| 849 | |
| 850 | /* Exception message. */ |
| 851 | if (hdr->msgh_local_port == darwin_ex_port) |
| 852 | { |
| 853 | int res; |
| 854 | |
| 855 | /* Decode message. */ |
| 856 | res = darwin_decode_exception_message (hdr, &inf, &thread); |
| 857 | |
| 858 | if (res < 0) |
| 859 | { |
| 860 | /* Should not happen... */ |
| 861 | printf_unfiltered (_("darwin_wait: ill-formatted message (id=%x)\n"), |
| 862 | hdr->msgh_id); |
| 863 | /* FIXME: send a failure reply? */ |
| 864 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 865 | return minus_one_ptid; |
| 866 | } |
| 867 | *pinf = inf; |
| 868 | *pthread = thread; |
| 869 | inf->private->pending_messages++; |
| 870 | |
| 871 | status->kind = TARGET_WAITKIND_STOPPED; |
| 872 | thread->msg_state = DARWIN_MESSAGE; |
| 873 | |
| 874 | inferior_debug (4, _("darwin_wait: thread=%x, got %s\n"), |
| 875 | thread->gdb_port, |
| 876 | unparse_exception_type (thread->event.ex_type)); |
| 877 | |
| 878 | switch (thread->event.ex_type) |
| 879 | { |
| 880 | case EXC_BAD_ACCESS: |
| 881 | status->value.sig = TARGET_EXC_BAD_ACCESS; |
| 882 | break; |
| 883 | case EXC_BAD_INSTRUCTION: |
| 884 | status->value.sig = TARGET_EXC_BAD_INSTRUCTION; |
| 885 | break; |
| 886 | case EXC_ARITHMETIC: |
| 887 | status->value.sig = TARGET_EXC_ARITHMETIC; |
| 888 | break; |
| 889 | case EXC_EMULATION: |
| 890 | status->value.sig = TARGET_EXC_EMULATION; |
| 891 | break; |
| 892 | case EXC_SOFTWARE: |
| 893 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
| 894 | { |
| 895 | status->value.sig = |
| 896 | target_signal_from_host (thread->event.ex_data[1]); |
| 897 | inferior_debug (5, _(" (signal %d: %s)\n"), |
| 898 | thread->event.ex_data[1], |
| 899 | target_signal_to_name (status->value.sig)); |
| 900 | |
| 901 | /* If the thread is stopped because it has received a signal |
| 902 | that gdb has just sent, continue. */ |
| 903 | if (thread->signaled) |
| 904 | { |
| 905 | thread->signaled = 0; |
| 906 | darwin_send_reply (inf, thread); |
| 907 | thread->msg_state = DARWIN_RUNNING; |
| 908 | status->kind = TARGET_WAITKIND_IGNORE; |
| 909 | } |
| 910 | } |
| 911 | else |
| 912 | status->value.sig = TARGET_EXC_SOFTWARE; |
| 913 | break; |
| 914 | case EXC_BREAKPOINT: |
| 915 | /* Many internal GDB routines expect breakpoints to be reported |
| 916 | as TARGET_SIGNAL_TRAP, and will report TARGET_EXC_BREAKPOINT |
| 917 | as a spurious signal. */ |
| 918 | status->value.sig = TARGET_SIGNAL_TRAP; |
| 919 | break; |
| 920 | default: |
| 921 | status->value.sig = TARGET_SIGNAL_UNKNOWN; |
| 922 | break; |
| 923 | } |
| 924 | |
| 925 | return ptid_build (inf->pid, 0, thread->gdb_port); |
| 926 | } |
| 927 | |
| 928 | *pinf = NULL; |
| 929 | *pthread = NULL; |
| 930 | |
| 931 | inf = darwin_find_inferior_by_notify (hdr->msgh_local_port); |
| 932 | if (inf != NULL) |
| 933 | { |
| 934 | if (!inf->private->no_ptrace) |
| 935 | { |
| 936 | pid_t res; |
| 937 | int wstatus; |
| 938 | |
| 939 | res = wait4 (inf->pid, &wstatus, 0, NULL); |
| 940 | if (res < 0 || res != inf->pid) |
| 941 | { |
| 942 | printf_unfiltered (_("wait4: res=%d: %s\n"), |
| 943 | res, safe_strerror (errno)); |
| 944 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 945 | return minus_one_ptid; |
| 946 | } |
| 947 | if (WIFEXITED (wstatus)) |
| 948 | { |
| 949 | status->kind = TARGET_WAITKIND_EXITED; |
| 950 | status->value.integer = WEXITSTATUS (wstatus); |
| 951 | } |
| 952 | else |
| 953 | { |
| 954 | status->kind = TARGET_WAITKIND_SIGNALLED; |
| 955 | status->value.sig = WTERMSIG (wstatus); |
| 956 | } |
| 957 | |
| 958 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=%x\n"), |
| 959 | res, wstatus); |
| 960 | |
| 961 | /* Looks necessary on Leopard and harmless... */ |
| 962 | wait4 (inf->pid, &wstatus, 0, NULL); |
| 963 | |
| 964 | return ptid_build (inf->pid, 0, 0); |
| 965 | } |
| 966 | else |
| 967 | { |
| 968 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
| 969 | status->kind = TARGET_WAITKIND_EXITED; |
| 970 | status->value.integer = 0; /* Don't know. */ |
| 971 | return ptid_build (inf->pid, 0, 0); |
| 972 | } |
| 973 | } |
| 974 | |
| 975 | printf_unfiltered (_("Bad local-port: %x\n"), hdr->msgh_local_port); |
| 976 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 977 | return minus_one_ptid; |
| 978 | } |
| 979 | |
| 980 | static int |
| 981 | cancel_breakpoint (ptid_t ptid) |
| 982 | { |
| 983 | /* Arrange for a breakpoint to be hit again later. We will handle |
| 984 | the current event, eventually we will resume this thread, and this |
| 985 | breakpoint will trap again. |
| 986 | |
| 987 | If we do not do this, then we run the risk that the user will |
| 988 | delete or disable the breakpoint, but the thread will have already |
| 989 | tripped on it. */ |
| 990 | |
| 991 | struct regcache *regcache = get_thread_regcache (ptid); |
| 992 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 993 | CORE_ADDR pc; |
| 994 | |
| 995 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
| 996 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc)) |
| 997 | { |
| 998 | inferior_debug (4, "cancel_breakpoint for thread %x\n", |
| 999 | ptid_get_tid (ptid)); |
| 1000 | |
| 1001 | /* Back up the PC if necessary. */ |
| 1002 | if (gdbarch_decr_pc_after_break (gdbarch)) |
| 1003 | regcache_write_pc (regcache, pc); |
| 1004 | |
| 1005 | return 1; |
| 1006 | } |
| 1007 | return 0; |
| 1008 | } |
| 1009 | |
| 1010 | static ptid_t |
| 1011 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) |
| 1012 | { |
| 1013 | kern_return_t kret; |
| 1014 | union |
| 1015 | { |
| 1016 | mach_msg_header_t hdr; |
| 1017 | char data[0x100]; |
| 1018 | } msgin; |
| 1019 | mach_msg_header_t *hdr = &msgin.hdr; |
| 1020 | ptid_t res; |
| 1021 | darwin_thread_t *thread; |
| 1022 | struct inferior *inf; |
| 1023 | |
| 1024 | inferior_debug |
| 1025 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), |
| 1026 | ptid_get_pid (ptid), ptid_get_tid (ptid)); |
| 1027 | |
| 1028 | /* Handle fake stop events at first. */ |
| 1029 | if (darwin_inf_fake_stop != NULL) |
| 1030 | { |
| 1031 | inf = darwin_inf_fake_stop; |
| 1032 | darwin_inf_fake_stop = NULL; |
| 1033 | |
| 1034 | status->kind = TARGET_WAITKIND_STOPPED; |
| 1035 | status->value.sig = TARGET_SIGNAL_TRAP; |
| 1036 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); |
| 1037 | thread->msg_state = DARWIN_STOPPED; |
| 1038 | return ptid_build (inf->pid, 0, thread->gdb_port); |
| 1039 | } |
| 1040 | |
| 1041 | do |
| 1042 | { |
| 1043 | /* set_sigint_trap (); */ |
| 1044 | |
| 1045 | /* Wait for a message. */ |
| 1046 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, |
| 1047 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); |
| 1048 | |
| 1049 | /* clear_sigint_trap (); */ |
| 1050 | |
| 1051 | if (kret == MACH_RCV_INTERRUPTED) |
| 1052 | { |
| 1053 | status->kind = TARGET_WAITKIND_IGNORE; |
| 1054 | return minus_one_ptid; |
| 1055 | } |
| 1056 | |
| 1057 | if (kret != MACH_MSG_SUCCESS) |
| 1058 | { |
| 1059 | inferior_debug (5, _("mach_msg: ret=%x\n"), kret); |
| 1060 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 1061 | return minus_one_ptid; |
| 1062 | } |
| 1063 | |
| 1064 | /* Debug: display message. */ |
| 1065 | if (darwin_debug_flag > 10) |
| 1066 | darwin_dump_message (hdr, darwin_debug_flag > 11); |
| 1067 | |
| 1068 | res = darwin_decode_message (hdr, &thread, &inf, status); |
| 1069 | |
| 1070 | if (inf == NULL) |
| 1071 | return res; |
| 1072 | } |
| 1073 | while (status->kind == TARGET_WAITKIND_IGNORE); |
| 1074 | |
| 1075 | /* Stop all tasks. */ |
| 1076 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); |
| 1077 | |
| 1078 | /* Read pending messages. */ |
| 1079 | while (1) |
| 1080 | { |
| 1081 | struct target_waitstatus status2; |
| 1082 | ptid_t ptid2; |
| 1083 | |
| 1084 | kret = mach_msg (&msgin.hdr, |
| 1085 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, |
| 1086 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); |
| 1087 | |
| 1088 | if (kret == MACH_RCV_TIMED_OUT) |
| 1089 | break; |
| 1090 | if (kret != MACH_MSG_SUCCESS) |
| 1091 | { |
| 1092 | inferior_debug |
| 1093 | (5, _("darwin_wait: mach_msg(pending) ret=%x\n"), kret); |
| 1094 | break; |
| 1095 | } |
| 1096 | |
| 1097 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); |
| 1098 | |
| 1099 | if (inf != NULL && thread != NULL |
| 1100 | && thread->event.ex_type == EXC_BREAKPOINT) |
| 1101 | { |
| 1102 | if (thread->single_step |
| 1103 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) |
| 1104 | { |
| 1105 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); |
| 1106 | darwin_send_reply (inf, thread); |
| 1107 | thread->msg_state = DARWIN_RUNNING; |
| 1108 | } |
| 1109 | else |
| 1110 | inferior_debug |
| 1111 | (3, _("darwin_wait: thread %x hit a non-gdb breakpoint\n"), |
| 1112 | thread->gdb_port); |
| 1113 | } |
| 1114 | else |
| 1115 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); |
| 1116 | } |
| 1117 | return res; |
| 1118 | } |
| 1119 | |
| 1120 | static ptid_t |
| 1121 | darwin_wait_to (struct target_ops *ops, |
| 1122 | ptid_t ptid, struct target_waitstatus *status, int options) |
| 1123 | { |
| 1124 | return darwin_wait (ptid, status); |
| 1125 | } |
| 1126 | |
| 1127 | static void |
| 1128 | darwin_stop (ptid_t t) |
| 1129 | { |
| 1130 | struct inferior *inf = current_inferior (); |
| 1131 | |
| 1132 | /* FIXME: handle in no_ptrace mode. */ |
| 1133 | gdb_assert (!inf->private->no_ptrace); |
| 1134 | kill (inf->pid, SIGINT); |
| 1135 | } |
| 1136 | |
| 1137 | static void |
| 1138 | darwin_mourn_inferior (struct target_ops *ops) |
| 1139 | { |
| 1140 | struct inferior *inf = current_inferior (); |
| 1141 | kern_return_t kret; |
| 1142 | mach_port_t prev; |
| 1143 | int i; |
| 1144 | |
| 1145 | unpush_target (darwin_ops); |
| 1146 | |
| 1147 | /* Deallocate threads. */ |
| 1148 | if (inf->private->threads) |
| 1149 | { |
| 1150 | int k; |
| 1151 | darwin_thread_t *t; |
| 1152 | for (k = 0; |
| 1153 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); |
| 1154 | k++) |
| 1155 | { |
| 1156 | kret = mach_port_deallocate (gdb_task, t->gdb_port); |
| 1157 | MACH_CHECK_ERROR (kret); |
| 1158 | } |
| 1159 | VEC_free (darwin_thread_t, inf->private->threads); |
| 1160 | inf->private->threads = NULL; |
| 1161 | } |
| 1162 | |
| 1163 | kret = mach_port_move_member (gdb_task, |
| 1164 | inf->private->notify_port, MACH_PORT_NULL); |
| 1165 | gdb_assert (kret == KERN_SUCCESS); |
| 1166 | |
| 1167 | kret = mach_port_request_notification (gdb_task, inf->private->task, |
| 1168 | MACH_NOTIFY_DEAD_NAME, 0, |
| 1169 | MACH_PORT_NULL, |
| 1170 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
| 1171 | &prev); |
| 1172 | /* This can fail if the task is dead. */ |
| 1173 | inferior_debug (4, "task=%x, prev=%x, notify_port=%x\n", |
| 1174 | inf->private->task, prev, inf->private->notify_port); |
| 1175 | |
| 1176 | if (kret == KERN_SUCCESS) |
| 1177 | { |
| 1178 | kret = mach_port_deallocate (gdb_task, prev); |
| 1179 | MACH_CHECK_ERROR (kret); |
| 1180 | } |
| 1181 | |
| 1182 | kret = mach_port_destroy (gdb_task, inf->private->notify_port); |
| 1183 | MACH_CHECK_ERROR (kret); |
| 1184 | |
| 1185 | |
| 1186 | /* Deallocate saved exception ports. */ |
| 1187 | for (i = 0; i < inf->private->exception_info.count; i++) |
| 1188 | { |
| 1189 | kret = mach_port_deallocate |
| 1190 | (gdb_task, inf->private->exception_info.ports[i]); |
| 1191 | MACH_CHECK_ERROR (kret); |
| 1192 | } |
| 1193 | inf->private->exception_info.count = 0; |
| 1194 | |
| 1195 | kret = mach_port_deallocate (gdb_task, inf->private->task); |
| 1196 | MACH_CHECK_ERROR (kret); |
| 1197 | |
| 1198 | xfree (inf->private); |
| 1199 | inf->private = NULL; |
| 1200 | |
| 1201 | generic_mourn_inferior (); |
| 1202 | } |
| 1203 | |
| 1204 | static void |
| 1205 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
| 1206 | { |
| 1207 | int k; |
| 1208 | darwin_thread_t *t; |
| 1209 | |
| 1210 | for (k = 0; |
| 1211 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); |
| 1212 | k++) |
| 1213 | { |
| 1214 | if (t->msg_state == DARWIN_MESSAGE) |
| 1215 | darwin_resume_thread (inf, t, 0, 0); |
| 1216 | } |
| 1217 | } |
| 1218 | |
| 1219 | static void |
| 1220 | darwin_stop_inferior (struct inferior *inf) |
| 1221 | { |
| 1222 | struct target_waitstatus wstatus; |
| 1223 | ptid_t ptid; |
| 1224 | kern_return_t kret; |
| 1225 | int status; |
| 1226 | int res; |
| 1227 | |
| 1228 | gdb_assert (inf != NULL); |
| 1229 | |
| 1230 | darwin_suspend_inferior (inf); |
| 1231 | |
| 1232 | darwin_reply_to_all_pending_messages (inf); |
| 1233 | |
| 1234 | if (inf->private->no_ptrace) |
| 1235 | return; |
| 1236 | |
| 1237 | res = kill (inf->pid, SIGSTOP); |
| 1238 | if (res != 0) |
| 1239 | warning (_("cannot kill: %s\n"), safe_strerror (errno)); |
| 1240 | |
| 1241 | /* Wait until the process is really stopped. */ |
| 1242 | while (1) |
| 1243 | { |
| 1244 | ptid = darwin_wait (inferior_ptid, &wstatus); |
| 1245 | if (wstatus.kind == TARGET_WAITKIND_STOPPED |
| 1246 | && wstatus.value.sig == TARGET_SIGNAL_STOP) |
| 1247 | break; |
| 1248 | } |
| 1249 | } |
| 1250 | |
| 1251 | static kern_return_t |
| 1252 | darwin_save_exception_ports (darwin_inferior *inf) |
| 1253 | { |
| 1254 | kern_return_t kret; |
| 1255 | |
| 1256 | inf->exception_info.count = |
| 1257 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); |
| 1258 | |
| 1259 | kret = task_get_exception_ports |
| 1260 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, |
| 1261 | &inf->exception_info.count, inf->exception_info.ports, |
| 1262 | inf->exception_info.behaviors, inf->exception_info.flavors); |
| 1263 | return kret; |
| 1264 | } |
| 1265 | |
| 1266 | static kern_return_t |
| 1267 | darwin_restore_exception_ports (darwin_inferior *inf) |
| 1268 | { |
| 1269 | int i; |
| 1270 | kern_return_t kret; |
| 1271 | |
| 1272 | for (i = 0; i < inf->exception_info.count; i++) |
| 1273 | { |
| 1274 | kret = task_set_exception_ports |
| 1275 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], |
| 1276 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); |
| 1277 | if (kret != KERN_SUCCESS) |
| 1278 | return kret; |
| 1279 | } |
| 1280 | |
| 1281 | return KERN_SUCCESS; |
| 1282 | } |
| 1283 | |
| 1284 | static void |
| 1285 | darwin_kill_inferior (struct target_ops *ops) |
| 1286 | { |
| 1287 | struct inferior *inf = current_inferior (); |
| 1288 | struct target_waitstatus wstatus; |
| 1289 | ptid_t ptid; |
| 1290 | kern_return_t kret; |
| 1291 | int status; |
| 1292 | int res; |
| 1293 | |
| 1294 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 1295 | return; |
| 1296 | |
| 1297 | gdb_assert (inf != NULL); |
| 1298 | |
| 1299 | if (!inf->private->no_ptrace) |
| 1300 | { |
| 1301 | darwin_stop_inferior (inf); |
| 1302 | |
| 1303 | res = PTRACE (PT_KILL, inf->pid, 0, 0); |
| 1304 | gdb_assert (res == 0); |
| 1305 | |
| 1306 | darwin_reply_to_all_pending_messages (inf); |
| 1307 | |
| 1308 | darwin_resume_inferior (inf); |
| 1309 | |
| 1310 | ptid = darwin_wait (inferior_ptid, &wstatus); |
| 1311 | } |
| 1312 | else |
| 1313 | { |
| 1314 | kret = darwin_restore_exception_ports (inf->private); |
| 1315 | MACH_CHECK_ERROR (kret); |
| 1316 | |
| 1317 | darwin_reply_to_all_pending_messages (inf); |
| 1318 | |
| 1319 | darwin_resume_inferior (inf); |
| 1320 | |
| 1321 | res = kill (inf->pid, 9); |
| 1322 | |
| 1323 | ptid = darwin_wait (inferior_ptid, &wstatus); |
| 1324 | } |
| 1325 | |
| 1326 | target_mourn_inferior (); |
| 1327 | } |
| 1328 | |
| 1329 | static void |
| 1330 | darwin_attach_pid (struct inferior *inf) |
| 1331 | { |
| 1332 | kern_return_t kret; |
| 1333 | mach_port_t prev_port; |
| 1334 | int traps_expected; |
| 1335 | mach_port_t prev_not; |
| 1336 | exception_mask_t mask; |
| 1337 | |
| 1338 | inf->private = XZALLOC (darwin_inferior); |
| 1339 | |
| 1340 | kret = task_for_pid (gdb_task, inf->pid, &inf->private->task); |
| 1341 | if (kret != KERN_SUCCESS) |
| 1342 | { |
| 1343 | int status; |
| 1344 | |
| 1345 | if (!inf->attach_flag) |
| 1346 | { |
| 1347 | kill (inf->pid, 9); |
| 1348 | waitpid (inf->pid, &status, 0); |
| 1349 | } |
| 1350 | |
| 1351 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" |
| 1352 | " (please check gdb is codesigned - see taskgated(8))"), |
| 1353 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
| 1354 | } |
| 1355 | |
| 1356 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
| 1357 | inf->private->task, inf->pid); |
| 1358 | |
| 1359 | if (darwin_ex_port == MACH_PORT_NULL) |
| 1360 | { |
| 1361 | /* Create a port to get exceptions. */ |
| 1362 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, |
| 1363 | &darwin_ex_port); |
| 1364 | gdb_assert (kret == KERN_SUCCESS); |
| 1365 | |
| 1366 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, |
| 1367 | MACH_MSG_TYPE_MAKE_SEND); |
| 1368 | gdb_assert (kret == KERN_SUCCESS); |
| 1369 | |
| 1370 | /* Create a port set and put ex_port in it. */ |
| 1371 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, |
| 1372 | &darwin_port_set); |
| 1373 | gdb_assert (kret == KERN_SUCCESS); |
| 1374 | |
| 1375 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); |
| 1376 | gdb_assert (kret == KERN_SUCCESS); |
| 1377 | } |
| 1378 | |
| 1379 | /* Create a port to be notified when the child task terminates. */ |
| 1380 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, |
| 1381 | &inf->private->notify_port); |
| 1382 | gdb_assert (kret == KERN_SUCCESS); |
| 1383 | |
| 1384 | kret = mach_port_move_member (gdb_task, |
| 1385 | inf->private->notify_port, darwin_port_set); |
| 1386 | gdb_assert (kret == KERN_SUCCESS); |
| 1387 | |
| 1388 | kret = mach_port_request_notification (gdb_task, inf->private->task, |
| 1389 | MACH_NOTIFY_DEAD_NAME, 0, |
| 1390 | inf->private->notify_port, |
| 1391 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
| 1392 | &prev_not); |
| 1393 | gdb_assert (kret == KERN_SUCCESS); |
| 1394 | gdb_assert (prev_not == MACH_PORT_NULL); |
| 1395 | |
| 1396 | kret = darwin_save_exception_ports (inf->private); |
| 1397 | gdb_assert (kret == KERN_SUCCESS); |
| 1398 | |
| 1399 | /* Set exception port. */ |
| 1400 | if (enable_mach_exceptions) |
| 1401 | mask = EXC_MASK_ALL; |
| 1402 | else |
| 1403 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
| 1404 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, |
| 1405 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
| 1406 | gdb_assert (kret == KERN_SUCCESS); |
| 1407 | |
| 1408 | push_target (darwin_ops); |
| 1409 | } |
| 1410 | |
| 1411 | static void |
| 1412 | darwin_init_thread_list (struct inferior *inf) |
| 1413 | { |
| 1414 | darwin_thread_t *thread; |
| 1415 | ptid_t new_ptid; |
| 1416 | |
| 1417 | darwin_check_new_threads (inf); |
| 1418 | |
| 1419 | gdb_assert (inf->private->threads |
| 1420 | && VEC_length (darwin_thread_t, inf->private->threads) > 0); |
| 1421 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); |
| 1422 | |
| 1423 | /* Note: fork_inferior automatically add a thead but it uses a wrong ptid. |
| 1424 | Fix up. */ |
| 1425 | new_ptid = ptid_build (inf->pid, 0, thread->gdb_port); |
| 1426 | thread_change_ptid (inferior_ptid, new_ptid); |
| 1427 | inferior_ptid = new_ptid; |
| 1428 | } |
| 1429 | |
| 1430 | /* The child must synchronize with gdb: gdb must set the exception port |
| 1431 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. |
| 1432 | FIXME: is there a lighter way ? */ |
| 1433 | static int ptrace_fds[2]; |
| 1434 | |
| 1435 | static void |
| 1436 | darwin_ptrace_me (void) |
| 1437 | { |
| 1438 | int res; |
| 1439 | char c; |
| 1440 | |
| 1441 | /* Close write end point. */ |
| 1442 | close (ptrace_fds[1]); |
| 1443 | |
| 1444 | /* Wait until gdb is ready. */ |
| 1445 | res = read (ptrace_fds[0], &c, 1); |
| 1446 | gdb_assert (res == 0); |
| 1447 | close (ptrace_fds[0]); |
| 1448 | |
| 1449 | /* Get rid of privileges. */ |
| 1450 | setegid (getgid ()); |
| 1451 | |
| 1452 | /* Set TRACEME. */ |
| 1453 | PTRACE (PT_TRACE_ME, 0, 0, 0); |
| 1454 | |
| 1455 | /* Redirect signals to exception port. */ |
| 1456 | PTRACE (PT_SIGEXC, 0, 0, 0); |
| 1457 | } |
| 1458 | |
| 1459 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ |
| 1460 | static void |
| 1461 | darwin_pre_ptrace (void) |
| 1462 | { |
| 1463 | if (pipe (ptrace_fds) != 0) |
| 1464 | { |
| 1465 | ptrace_fds[0] = -1; |
| 1466 | ptrace_fds[1] = -1; |
| 1467 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); |
| 1468 | } |
| 1469 | } |
| 1470 | |
| 1471 | static void |
| 1472 | darwin_ptrace_him (int pid) |
| 1473 | { |
| 1474 | task_t itask; |
| 1475 | kern_return_t kret; |
| 1476 | mach_port_t prev_port; |
| 1477 | int traps_expected; |
| 1478 | struct inferior *inf = current_inferior (); |
| 1479 | |
| 1480 | darwin_attach_pid (inf); |
| 1481 | |
| 1482 | /* Let's the child run. */ |
| 1483 | close (ptrace_fds[0]); |
| 1484 | close (ptrace_fds[1]); |
| 1485 | |
| 1486 | darwin_init_thread_list (inf); |
| 1487 | |
| 1488 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
| 1489 | } |
| 1490 | |
| 1491 | static void |
| 1492 | darwin_create_inferior (struct target_ops *ops, char *exec_file, |
| 1493 | char *allargs, char **env, int from_tty) |
| 1494 | { |
| 1495 | /* Do the hard work. */ |
| 1496 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, darwin_ptrace_him, |
| 1497 | darwin_pre_ptrace, NULL); |
| 1498 | |
| 1499 | /* Return now in case of error. */ |
| 1500 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 1501 | return; |
| 1502 | } |
| 1503 | \f |
| 1504 | |
| 1505 | /* Attach to process PID, then initialize for debugging it |
| 1506 | and wait for the trace-trap that results from attaching. */ |
| 1507 | static void |
| 1508 | darwin_attach (struct target_ops *ops, char *args, int from_tty) |
| 1509 | { |
| 1510 | pid_t pid; |
| 1511 | pid_t pid2; |
| 1512 | int wstatus; |
| 1513 | int res; |
| 1514 | struct inferior *inf; |
| 1515 | kern_return_t kret; |
| 1516 | |
| 1517 | pid = parse_pid_to_attach (args); |
| 1518 | |
| 1519 | if (pid == getpid ()) /* Trying to masturbate? */ |
| 1520 | error (_("I refuse to debug myself!")); |
| 1521 | |
| 1522 | if (from_tty) |
| 1523 | { |
| 1524 | char *exec_file = get_exec_file (0); |
| 1525 | |
| 1526 | if (exec_file) |
| 1527 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, |
| 1528 | target_pid_to_str (pid_to_ptid (pid))); |
| 1529 | else |
| 1530 | printf_unfiltered (_("Attaching to %s\n"), |
| 1531 | target_pid_to_str (pid_to_ptid (pid))); |
| 1532 | |
| 1533 | gdb_flush (gdb_stdout); |
| 1534 | } |
| 1535 | |
| 1536 | if (pid == 0 || kill (pid, 0) < 0) |
| 1537 | error (_("Can't attach to process %d: %s (%d)"), |
| 1538 | pid, safe_strerror (errno), errno); |
| 1539 | |
| 1540 | inferior_ptid = pid_to_ptid (pid); |
| 1541 | inf = current_inferior (); |
| 1542 | inferior_appeared (inf, pid); |
| 1543 | inf->attach_flag = 1; |
| 1544 | |
| 1545 | /* Always add a main thread. */ |
| 1546 | add_thread_silent (inferior_ptid); |
| 1547 | |
| 1548 | darwin_attach_pid (inf); |
| 1549 | |
| 1550 | darwin_suspend_inferior (inf); |
| 1551 | |
| 1552 | darwin_init_thread_list (inf); |
| 1553 | |
| 1554 | darwin_check_osabi (inf->private, ptid_get_tid (inferior_ptid)); |
| 1555 | |
| 1556 | gdb_assert (darwin_inf_fake_stop == NULL); |
| 1557 | darwin_inf_fake_stop = inf; |
| 1558 | inf->private->no_ptrace = 1; |
| 1559 | } |
| 1560 | |
| 1561 | /* Take a program previously attached to and detaches it. |
| 1562 | The program resumes execution and will no longer stop |
| 1563 | on signals, etc. We'd better not have left any breakpoints |
| 1564 | in the program or it'll die when it hits one. For this |
| 1565 | to work, it may be necessary for the process to have been |
| 1566 | previously attached. It *might* work if the program was |
| 1567 | started via fork. */ |
| 1568 | static void |
| 1569 | darwin_detach (struct target_ops *ops, char *args, int from_tty) |
| 1570 | { |
| 1571 | pid_t pid = ptid_get_pid (inferior_ptid); |
| 1572 | struct inferior *inf = current_inferior (); |
| 1573 | kern_return_t kret; |
| 1574 | int res; |
| 1575 | |
| 1576 | /* Display message. */ |
| 1577 | if (from_tty) |
| 1578 | { |
| 1579 | char *exec_file = get_exec_file (0); |
| 1580 | if (exec_file == 0) |
| 1581 | exec_file = ""; |
| 1582 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
| 1583 | target_pid_to_str (pid_to_ptid (pid))); |
| 1584 | gdb_flush (gdb_stdout); |
| 1585 | } |
| 1586 | |
| 1587 | /* If ptrace() is in use, stop the process. */ |
| 1588 | if (!inf->private->no_ptrace) |
| 1589 | darwin_stop_inferior (inf); |
| 1590 | |
| 1591 | kret = darwin_restore_exception_ports (inf->private); |
| 1592 | MACH_CHECK_ERROR (kret); |
| 1593 | |
| 1594 | if (!inf->private->no_ptrace) |
| 1595 | { |
| 1596 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
| 1597 | if (res != 0) |
| 1598 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), |
| 1599 | inf->pid, safe_strerror (errno), errno); |
| 1600 | } |
| 1601 | |
| 1602 | darwin_reply_to_all_pending_messages (inf); |
| 1603 | |
| 1604 | darwin_resume_inferior (inf); |
| 1605 | |
| 1606 | darwin_mourn_inferior (ops); |
| 1607 | } |
| 1608 | |
| 1609 | static void |
| 1610 | darwin_files_info (struct target_ops *ops) |
| 1611 | { |
| 1612 | } |
| 1613 | |
| 1614 | static char * |
| 1615 | darwin_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| 1616 | { |
| 1617 | static char buf[80]; |
| 1618 | long tid = ptid_get_tid (ptid); |
| 1619 | |
| 1620 | if (tid != 0) |
| 1621 | { |
| 1622 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), |
| 1623 | tid, ptid_get_pid (ptid)); |
| 1624 | return buf; |
| 1625 | } |
| 1626 | |
| 1627 | return normal_pid_to_str (ptid); |
| 1628 | } |
| 1629 | |
| 1630 | static int |
| 1631 | darwin_thread_alive (struct target_ops *ops, ptid_t ptid) |
| 1632 | { |
| 1633 | return 1; |
| 1634 | } |
| 1635 | |
| 1636 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and |
| 1637 | copy it to RDADDR in gdb's address space. |
| 1638 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it |
| 1639 | to ADDR in inferior task's address space. |
| 1640 | Return 0 on failure; number of bytes read / writen otherwise. */ |
| 1641 | static int |
| 1642 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, |
| 1643 | char *rdaddr, const char *wraddr, int length) |
| 1644 | { |
| 1645 | kern_return_t kret; |
| 1646 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
| 1647 | mach_vm_address_t low_address = (mach_vm_address_t) (addr - offset); |
| 1648 | mach_vm_size_t aligned_length = (mach_vm_size_t) PAGE_ROUND (offset + length); |
| 1649 | pointer_t copied; |
| 1650 | int copy_count; |
| 1651 | mach_vm_size_t remaining_length; |
| 1652 | mach_vm_address_t region_address; |
| 1653 | mach_vm_size_t region_length; |
| 1654 | |
| 1655 | inferior_debug (8, _("darwin_read_write_inferior(task=%x, %s, len=%d)\n"), |
| 1656 | task, core_addr_to_string (addr), length); |
| 1657 | |
| 1658 | /* Get memory from inferior with page aligned addresses. */ |
| 1659 | kret = mach_vm_read (task, low_address, aligned_length, |
| 1660 | &copied, ©_count); |
| 1661 | if (kret != KERN_SUCCESS) |
| 1662 | { |
| 1663 | inferior_debug |
| 1664 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), |
| 1665 | core_addr_to_string (addr), mach_error_string (kret)); |
| 1666 | return 0; |
| 1667 | } |
| 1668 | |
| 1669 | if (rdaddr != NULL) |
| 1670 | memcpy (rdaddr, (char *)copied + offset, length); |
| 1671 | |
| 1672 | if (wraddr == NULL) |
| 1673 | goto out; |
| 1674 | |
| 1675 | memcpy ((char *)copied + offset, wraddr, length); |
| 1676 | |
| 1677 | /* Do writes atomically. |
| 1678 | First check for holes and unwritable memory. */ |
| 1679 | for (region_address = low_address, remaining_length = aligned_length; |
| 1680 | region_address < low_address + aligned_length; |
| 1681 | region_address += region_length, remaining_length -= region_length) |
| 1682 | { |
| 1683 | vm_region_submap_short_info_data_64_t info; |
| 1684 | mach_vm_address_t region_start = region_address; |
| 1685 | mach_msg_type_number_t count; |
| 1686 | natural_t region_depth; |
| 1687 | |
| 1688 | region_depth = 100000; |
| 1689 | count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; |
| 1690 | kret = mach_vm_region_recurse |
| 1691 | (task, ®ion_start, ®ion_length, ®ion_depth, |
| 1692 | (vm_region_recurse_info_t) &info, &count); |
| 1693 | |
| 1694 | if (kret != KERN_SUCCESS) |
| 1695 | { |
| 1696 | inferior_debug (1, _("darwin_read_write_inferior: " |
| 1697 | "mach_vm_region_recurse failed at %s: %s\n"), |
| 1698 | core_addr_to_string (region_address), |
| 1699 | mach_error_string (kret)); |
| 1700 | goto out; |
| 1701 | } |
| 1702 | |
| 1703 | inferior_debug |
| 1704 | (9, _("darwin_read_write_inferior: " |
| 1705 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), |
| 1706 | core_addr_to_string (region_address), |
| 1707 | core_addr_to_string (region_start), |
| 1708 | core_addr_to_string (region_length)); |
| 1709 | |
| 1710 | /* Check for holes in memory. */ |
| 1711 | if (region_start > region_address) |
| 1712 | { |
| 1713 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
| 1714 | core_addr_to_string (region_address), |
| 1715 | core_addr_to_string (region_start), |
| 1716 | (unsigned)region_length); |
| 1717 | length = 0; |
| 1718 | goto out; |
| 1719 | } |
| 1720 | |
| 1721 | /* Adjust the length. */ |
| 1722 | region_length -= (region_address - region_start); |
| 1723 | |
| 1724 | if (!(info.max_protection & VM_PROT_WRITE)) |
| 1725 | { |
| 1726 | kret = mach_vm_protect |
| 1727 | (task, region_address, region_length, |
| 1728 | TRUE, info.max_protection | VM_PROT_WRITE | VM_PROT_COPY); |
| 1729 | if (kret != KERN_SUCCESS) |
| 1730 | { |
| 1731 | warning (_("darwin_read_write_inf: " |
| 1732 | "mach_vm_protect max failed at %s: %s"), |
| 1733 | core_addr_to_string (region_address), |
| 1734 | mach_error_string (kret)); |
| 1735 | length = 0; |
| 1736 | goto out; |
| 1737 | } |
| 1738 | } |
| 1739 | |
| 1740 | if (!(info.protection & VM_PROT_WRITE)) |
| 1741 | { |
| 1742 | kret = mach_vm_protect (task, region_address, region_length, |
| 1743 | FALSE, info.protection | VM_PROT_WRITE); |
| 1744 | if (kret != KERN_SUCCESS) |
| 1745 | { |
| 1746 | warning (_("darwin_read_write_inf: " |
| 1747 | "mach_vm_protect failed at %s (len=0x%lx): %s"), |
| 1748 | core_addr_to_string (region_address), |
| 1749 | (unsigned long)region_length, mach_error_string (kret)); |
| 1750 | length = 0; |
| 1751 | goto out; |
| 1752 | } |
| 1753 | } |
| 1754 | } |
| 1755 | |
| 1756 | kret = mach_vm_write (task, low_address, copied, aligned_length); |
| 1757 | |
| 1758 | if (kret != KERN_SUCCESS) |
| 1759 | { |
| 1760 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), |
| 1761 | mach_error_string (kret)); |
| 1762 | length = 0; |
| 1763 | } |
| 1764 | out: |
| 1765 | mach_vm_deallocate (mach_task_self (), copied, copy_count); |
| 1766 | return length; |
| 1767 | } |
| 1768 | |
| 1769 | \f |
| 1770 | /* Return 0 on failure, number of bytes handled otherwise. TARGET |
| 1771 | is ignored. */ |
| 1772 | static int |
| 1773 | darwin_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, |
| 1774 | struct mem_attrib *attrib, struct target_ops *target) |
| 1775 | { |
| 1776 | struct inferior *inf = current_inferior (); |
| 1777 | task_t task = inf->private->task; |
| 1778 | |
| 1779 | if (task == MACH_PORT_NULL) |
| 1780 | return 0; |
| 1781 | |
| 1782 | inferior_debug (8, _("darwin_xfer_memory(%s, %d, %c)\n"), |
| 1783 | core_addr_to_string (memaddr), len, write ? 'w' : 'r'); |
| 1784 | |
| 1785 | if (write) |
| 1786 | return darwin_read_write_inferior (task, memaddr, NULL, myaddr, len); |
| 1787 | else |
| 1788 | return darwin_read_write_inferior (task, memaddr, myaddr, NULL, len); |
| 1789 | } |
| 1790 | |
| 1791 | static LONGEST |
| 1792 | darwin_xfer_partial (struct target_ops *ops, |
| 1793 | enum target_object object, const char *annex, |
| 1794 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 1795 | ULONGEST offset, LONGEST len) |
| 1796 | { |
| 1797 | struct inferior *inf = current_inferior (); |
| 1798 | |
| 1799 | inferior_debug |
| 1800 | (8, _("darwin_xfer_partial(%s, %d, rbuf=%s, wbuf=%s) pid=%u\n"), |
| 1801 | core_addr_to_string (offset), (int)len, |
| 1802 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
| 1803 | inf->pid); |
| 1804 | |
| 1805 | if (object != TARGET_OBJECT_MEMORY) |
| 1806 | return -1; |
| 1807 | |
| 1808 | return darwin_read_write_inferior (inf->private->task, offset, |
| 1809 | readbuf, writebuf, len); |
| 1810 | } |
| 1811 | |
| 1812 | static void |
| 1813 | set_enable_mach_exceptions (char *args, int from_tty, |
| 1814 | struct cmd_list_element *c) |
| 1815 | { |
| 1816 | if (!ptid_equal (inferior_ptid, null_ptid)) |
| 1817 | { |
| 1818 | struct inferior *inf = current_inferior (); |
| 1819 | exception_mask_t mask; |
| 1820 | kern_return_t kret; |
| 1821 | |
| 1822 | if (enable_mach_exceptions) |
| 1823 | mask = EXC_MASK_ALL; |
| 1824 | else |
| 1825 | { |
| 1826 | darwin_restore_exception_ports (inf->private); |
| 1827 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
| 1828 | } |
| 1829 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, |
| 1830 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
| 1831 | MACH_CHECK_ERROR (kret); |
| 1832 | } |
| 1833 | } |
| 1834 | |
| 1835 | static char * |
| 1836 | darwin_pid_to_exec_file (int pid) |
| 1837 | { |
| 1838 | char *path; |
| 1839 | int res; |
| 1840 | |
| 1841 | path = xmalloc (MAXPATHLEN); |
| 1842 | make_cleanup (xfree, path); |
| 1843 | |
| 1844 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, MAXPATHLEN); |
| 1845 | if (res >= 0) |
| 1846 | return path; |
| 1847 | else |
| 1848 | return NULL; |
| 1849 | } |
| 1850 | |
| 1851 | static ptid_t |
| 1852 | darwin_get_ada_task_ptid (long lwp, long thread) |
| 1853 | { |
| 1854 | int i; |
| 1855 | darwin_thread_t *t; |
| 1856 | int k; |
| 1857 | struct inferior *inf = current_inferior (); |
| 1858 | kern_return_t kret; |
| 1859 | mach_port_name_array_t names; |
| 1860 | mach_msg_type_number_t names_count; |
| 1861 | mach_port_type_array_t types; |
| 1862 | mach_msg_type_number_t types_count; |
| 1863 | long res = 0; |
| 1864 | |
| 1865 | /* First linear search. */ |
| 1866 | for (k = 0; |
| 1867 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); |
| 1868 | k++) |
| 1869 | if (t->inf_port == lwp) |
| 1870 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); |
| 1871 | |
| 1872 | /* Maybe the port was never extract. Do it now. */ |
| 1873 | |
| 1874 | /* First get inferior port names. */ |
| 1875 | kret = mach_port_names (inf->private->task, &names, &names_count, &types, |
| 1876 | &types_count); |
| 1877 | MACH_CHECK_ERROR (kret); |
| 1878 | if (kret != KERN_SUCCESS) |
| 1879 | return null_ptid; |
| 1880 | |
| 1881 | /* For each name, copy the right in the gdb space and then compare with |
| 1882 | our view of the inferior threads. We don't forget to deallocate the |
| 1883 | right. */ |
| 1884 | for (i = 0; i < names_count; i++) |
| 1885 | { |
| 1886 | mach_port_t local_name; |
| 1887 | mach_msg_type_name_t local_type; |
| 1888 | |
| 1889 | /* We just need to know the corresponding name in gdb name space. |
| 1890 | So extract and deallocate the right. */ |
| 1891 | kret = mach_port_extract_right (inf->private->task, names[i], |
| 1892 | MACH_MSG_TYPE_COPY_SEND, |
| 1893 | &local_name, &local_type); |
| 1894 | if (kret != KERN_SUCCESS) |
| 1895 | continue; |
| 1896 | mach_port_deallocate (gdb_task, local_name); |
| 1897 | |
| 1898 | for (k = 0; |
| 1899 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); |
| 1900 | k++) |
| 1901 | if (t->gdb_port == local_name) |
| 1902 | { |
| 1903 | t->inf_port = names[i]; |
| 1904 | if (names[i] == lwp) |
| 1905 | res = t->gdb_port; |
| 1906 | } |
| 1907 | } |
| 1908 | |
| 1909 | vm_deallocate (gdb_task, (vm_address_t) names, |
| 1910 | names_count * sizeof (mach_port_t)); |
| 1911 | |
| 1912 | if (res) |
| 1913 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); |
| 1914 | else |
| 1915 | return null_ptid; |
| 1916 | } |
| 1917 | |
| 1918 | static int |
| 1919 | darwin_supports_multi_process (void) |
| 1920 | { |
| 1921 | return 1; |
| 1922 | } |
| 1923 | |
| 1924 | void |
| 1925 | _initialize_darwin_inferior (void) |
| 1926 | { |
| 1927 | kern_return_t kret; |
| 1928 | |
| 1929 | gdb_task = mach_task_self (); |
| 1930 | darwin_host_self = mach_host_self (); |
| 1931 | |
| 1932 | /* Read page size. */ |
| 1933 | kret = host_page_size (darwin_host_self, &mach_page_size); |
| 1934 | if (kret != KERN_SUCCESS) |
| 1935 | { |
| 1936 | mach_page_size = 0x1000; |
| 1937 | MACH_CHECK_ERROR (kret); |
| 1938 | } |
| 1939 | |
| 1940 | darwin_ops = inf_child_target (); |
| 1941 | |
| 1942 | darwin_ops->to_shortname = "darwin-child"; |
| 1943 | darwin_ops->to_longname = _("Darwin child process"); |
| 1944 | darwin_ops->to_doc = |
| 1945 | _("Darwin child process (started by the \"run\" command)."); |
| 1946 | darwin_ops->to_create_inferior = darwin_create_inferior; |
| 1947 | darwin_ops->to_attach = darwin_attach; |
| 1948 | darwin_ops->to_attach_no_wait = 0; |
| 1949 | darwin_ops->to_detach = darwin_detach; |
| 1950 | darwin_ops->to_files_info = darwin_files_info; |
| 1951 | darwin_ops->to_wait = darwin_wait_to; |
| 1952 | darwin_ops->to_mourn_inferior = darwin_mourn_inferior; |
| 1953 | darwin_ops->to_kill = darwin_kill_inferior; |
| 1954 | darwin_ops->to_stop = darwin_stop; |
| 1955 | darwin_ops->to_resume = darwin_resume_to; |
| 1956 | darwin_ops->to_thread_alive = darwin_thread_alive; |
| 1957 | darwin_ops->to_pid_to_str = darwin_pid_to_str; |
| 1958 | darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file; |
| 1959 | darwin_ops->to_load = NULL; |
| 1960 | darwin_ops->deprecated_xfer_memory = darwin_xfer_memory; |
| 1961 | darwin_ops->to_xfer_partial = darwin_xfer_partial; |
| 1962 | darwin_ops->to_supports_multi_process = darwin_supports_multi_process; |
| 1963 | darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid; |
| 1964 | |
| 1965 | darwin_complete_target (darwin_ops); |
| 1966 | |
| 1967 | add_target (darwin_ops); |
| 1968 | |
| 1969 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), mach_task_self (), |
| 1970 | getpid ()); |
| 1971 | |
| 1972 | add_setshow_zinteger_cmd ("darwin", class_obscure, |
| 1973 | &darwin_debug_flag, _("\ |
| 1974 | Set if printing inferior communication debugging statements."), _("\ |
| 1975 | Show if printing inferior communication debugging statements."), NULL, |
| 1976 | NULL, NULL, |
| 1977 | &setdebuglist, &showdebuglist); |
| 1978 | |
| 1979 | add_setshow_boolean_cmd ("mach-exceptions", class_support, |
| 1980 | &enable_mach_exceptions, _("\ |
| 1981 | Set if mach exceptions are caught."), _("\ |
| 1982 | Show if mach exceptions are caught."), _("\ |
| 1983 | When this mode is on, all low level exceptions are reported before being\n\ |
| 1984 | reported by the kernel."), |
| 1985 | &set_enable_mach_exceptions, NULL, |
| 1986 | &setlist, &showlist); |
| 1987 | } |