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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
0b302171 | 2 | Copyright (C) 2008-2012 Free Software Foundation, Inc. |
a80b95ba TG |
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> | |
bb00b29d TG |
54 | #include <libproc.h> |
55 | #include <sys/syscall.h> | |
e69860f1 | 56 | #include <spawn.h> |
a80b95ba TG |
57 | |
58 | #include <mach/mach_error.h> | |
59 | #include <mach/mach_vm.h> | |
60 | #include <mach/mach_init.h> | |
61 | #include <mach/vm_map.h> | |
62 | #include <mach/task.h> | |
63 | #include <mach/mach_port.h> | |
64 | #include <mach/thread_act.h> | |
65 | #include <mach/port.h> | |
66 | ||
67 | #include "darwin-nat.h" | |
68 | ||
69 | /* Quick overview. | |
70 | Darwin kernel is Mach + BSD derived kernel. Note that they share the | |
71 | same memory space and are linked together (ie there is no micro-kernel). | |
72 | ||
73 | Although ptrace(2) is available on Darwin, it is not complete. We have | |
74 | to use Mach calls to read and write memory and to modify registers. We | |
75 | also use Mach to get inferior faults. As we cannot use select(2) or | |
76 | signals with Mach port (the Mach communication channel), signals are | |
77 | reported to gdb as an exception. Furthermore we detect death of the | |
78 | inferior through a Mach notification message. This way we only wait | |
79 | on Mach ports. | |
80 | ||
81 | Some Mach documentation is available for Apple xnu source package or | |
82 | from the web. */ | |
83 | ||
84 | ||
85 | #define PTRACE(CMD, PID, ADDR, SIG) \ | |
86 | darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG)) | |
87 | ||
88 | extern boolean_t exc_server (mach_msg_header_t *in, mach_msg_header_t *out); | |
89 | ||
90 | static void darwin_stop (ptid_t); | |
91 | ||
bb00b29d TG |
92 | static void darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, |
93 | enum target_signal signal); | |
94 | static void darwin_resume (ptid_t ptid, int step, | |
95 | enum target_signal signal); | |
96 | ||
97 | static ptid_t darwin_wait_to (struct target_ops *ops, ptid_t ptid, | |
98 | struct target_waitstatus *status, int options); | |
99 | static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status); | |
100 | ||
a80b95ba TG |
101 | static void darwin_mourn_inferior (struct target_ops *ops); |
102 | ||
2ab1c2d9 | 103 | static void darwin_kill_inferior (struct target_ops *ops); |
a80b95ba TG |
104 | |
105 | static void darwin_ptrace_me (void); | |
106 | ||
107 | static void darwin_ptrace_him (int pid); | |
108 | ||
109 | static void darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
110 | char *allargs, char **env, int from_tty); | |
111 | ||
112 | static void darwin_files_info (struct target_ops *ops); | |
113 | ||
bb00b29d TG |
114 | static char *darwin_pid_to_str (struct target_ops *ops, ptid_t tpid); |
115 | ||
116 | static int darwin_thread_alive (struct target_ops *ops, ptid_t tpid); | |
a80b95ba TG |
117 | |
118 | /* Target operations for Darwin. */ | |
119 | static struct target_ops *darwin_ops; | |
120 | ||
121 | /* Task identifier of gdb. */ | |
122 | static task_t gdb_task; | |
123 | ||
124 | /* A copy of mach_host_self (). */ | |
125 | mach_port_t darwin_host_self; | |
126 | ||
127 | /* Exception port. */ | |
128 | mach_port_t darwin_ex_port; | |
129 | ||
a80b95ba TG |
130 | /* Port set. */ |
131 | mach_port_t darwin_port_set; | |
132 | ||
0963b4bd | 133 | /* Page size. */ |
a80b95ba TG |
134 | static vm_size_t mach_page_size; |
135 | ||
136 | /* If Set, catch all mach exceptions (before they are converted to signals | |
137 | by the kernel). */ | |
138 | static int enable_mach_exceptions; | |
139 | ||
bb00b29d TG |
140 | /* Inferior that should report a fake stop event. */ |
141 | static struct inferior *darwin_inf_fake_stop; | |
142 | ||
a80b95ba TG |
143 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
144 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
145 | ||
bb00b29d | 146 | /* This controls output of inferior debugging. */ |
a80b95ba TG |
147 | static int darwin_debug_flag = 0; |
148 | ||
15c19d39 TG |
149 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
150 | be signed. This is required to get an authorization for task_for_pid. | |
151 | ||
152 | Once gdb is built, you can either: | |
153 | * make it setgid procmod | |
154 | * or codesign it with any system-trusted signing authority. | |
155 | See taskgated(8) for details. */ | |
156 | static const unsigned char info_plist[] | |
157 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
158 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
159 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
160 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
161 | "<plist version=\"1.0\">\n" | |
162 | "<dict>\n" | |
163 | " <key>CFBundleIdentifier</key>\n" | |
164 | " <string>org.gnu.gdb</string>\n" | |
165 | " <key>CFBundleName</key>\n" | |
166 | " <string>gdb</string>\n" | |
167 | " <key>CFBundleVersion</key>\n" | |
168 | " <string>1.0</string>\n" | |
169 | " <key>SecTaskAccess</key>\n" | |
170 | " <array>\n" | |
171 | " <string>allowed</string>\n" | |
172 | " <string>debug</string>\n" | |
173 | " </array>\n" | |
174 | "</dict>\n" | |
175 | "</plist>\n"; | |
176 | ||
a80b95ba TG |
177 | static void |
178 | inferior_debug (int level, const char *fmt, ...) | |
179 | { | |
180 | va_list ap; | |
181 | ||
182 | if (darwin_debug_flag < level) | |
183 | return; | |
184 | ||
185 | va_start (ap, fmt); | |
186 | printf_unfiltered (_("[%d inferior]: "), getpid ()); | |
187 | vprintf_unfiltered (fmt, ap); | |
188 | va_end (ap); | |
189 | } | |
190 | ||
191 | void | |
192 | mach_check_error (kern_return_t ret, const char *file, | |
193 | unsigned int line, const char *func) | |
194 | { | |
195 | if (ret == KERN_SUCCESS) | |
196 | return; | |
197 | if (func == NULL) | |
198 | func = _("[UNKNOWN]"); | |
bb00b29d | 199 | |
4f1cdeec | 200 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 201 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
202 | } |
203 | ||
204 | static const char * | |
205 | unparse_exception_type (unsigned int i) | |
206 | { | |
207 | static char unknown_exception_buf[32]; | |
208 | ||
209 | switch (i) | |
210 | { | |
211 | case EXC_BAD_ACCESS: | |
212 | return "EXC_BAD_ACCESS"; | |
213 | case EXC_BAD_INSTRUCTION: | |
214 | return "EXC_BAD_INSTRUCTION"; | |
215 | case EXC_ARITHMETIC: | |
216 | return "EXC_ARITHMETIC"; | |
217 | case EXC_EMULATION: | |
218 | return "EXC_EMULATION"; | |
219 | case EXC_SOFTWARE: | |
220 | return "EXC_SOFTWARE"; | |
221 | case EXC_BREAKPOINT: | |
222 | return "EXC_BREAKPOINT"; | |
223 | case EXC_SYSCALL: | |
224 | return "EXC_SYSCALL"; | |
225 | case EXC_MACH_SYSCALL: | |
226 | return "EXC_MACH_SYSCALL"; | |
227 | case EXC_RPC_ALERT: | |
228 | return "EXC_RPC_ALERT"; | |
229 | case EXC_CRASH: | |
230 | return "EXC_CRASH"; | |
231 | default: | |
232 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
233 | return unknown_exception_buf; | |
234 | } | |
235 | } | |
236 | ||
a7aa0d73 JB |
237 | /* Set errno to zero, and then call ptrace with the given arguments. |
238 | If inferior debugging traces are on, then also print a debug | |
239 | trace. | |
240 | ||
241 | The returned value is the same as the value returned by ptrace, | |
242 | except in the case where that value is -1 but errno is zero. | |
243 | This case is documented to be a non-error situation, so we | |
244 | return zero in that case. */ | |
245 | ||
a80b95ba TG |
246 | static int |
247 | darwin_ptrace (const char *name, | |
248 | int request, int pid, PTRACE_TYPE_ARG3 arg3, int arg4) | |
249 | { | |
250 | int ret; | |
251 | ||
a7aa0d73 | 252 | errno = 0; |
a80b95ba | 253 | ret = ptrace (request, pid, (caddr_t) arg3, arg4); |
a7aa0d73 JB |
254 | if (ret == -1 && errno == 0) |
255 | ret = 0; | |
a80b95ba | 256 | |
bb00b29d | 257 | inferior_debug (4, _("ptrace (%s, %d, 0x%x, %d): %d (%s)\n"), |
a80b95ba | 258 | name, pid, arg3, arg4, ret, |
a3224241 | 259 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
260 | return ret; |
261 | } | |
262 | ||
263 | static int | |
264 | cmp_thread_t (const void *l, const void *r) | |
265 | { | |
bb00b29d TG |
266 | thread_t tl = *(const thread_t *)l; |
267 | thread_t tr = *(const thread_t *)r; | |
268 | return (int)(tl - tr); | |
a80b95ba TG |
269 | } |
270 | ||
271 | static void | |
bb00b29d | 272 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
273 | { |
274 | kern_return_t kret; | |
275 | unsigned int i; | |
276 | thread_array_t thread_list; | |
277 | unsigned int new_nbr; | |
278 | unsigned int old_nbr; | |
279 | unsigned int new_ix, old_ix; | |
bb00b29d TG |
280 | darwin_inferior *darwin_inf = inf->private; |
281 | VEC (darwin_thread_t) *thread_vec; | |
a80b95ba TG |
282 | |
283 | /* Get list of threads. */ | |
bb00b29d | 284 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
285 | MACH_CHECK_ERROR (kret); |
286 | if (kret != KERN_SUCCESS) | |
287 | return; | |
288 | ||
bb00b29d | 289 | /* Sort the list. */ |
a80b95ba TG |
290 | if (new_nbr > 1) |
291 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
292 | ||
bb00b29d TG |
293 | if (darwin_inf->threads) |
294 | old_nbr = VEC_length (darwin_thread_t, darwin_inf->threads); | |
a80b95ba TG |
295 | else |
296 | old_nbr = 0; | |
297 | ||
bb00b29d TG |
298 | /* Quick check for no changes. */ |
299 | if (old_nbr == new_nbr) | |
300 | { | |
301 | for (i = 0; i < new_nbr; i++) | |
302 | if (thread_list[i] | |
303 | != VEC_index (darwin_thread_t, darwin_inf->threads, i)->gdb_port) | |
304 | break; | |
305 | if (i == new_nbr) | |
306 | { | |
307 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, | |
308 | new_nbr * sizeof (int)); | |
309 | MACH_CHECK_ERROR (kret); | |
310 | return; | |
311 | } | |
312 | } | |
313 | ||
314 | thread_vec = VEC_alloc (darwin_thread_t, new_nbr); | |
315 | ||
a80b95ba TG |
316 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
317 | { | |
318 | thread_t new_id = (new_ix < new_nbr) ? | |
319 | thread_list[new_ix] : THREAD_NULL; | |
bb00b29d TG |
320 | darwin_thread_t *old = (old_ix < old_nbr) ? |
321 | VEC_index (darwin_thread_t, darwin_inf->threads, old_ix) : NULL; | |
322 | thread_t old_id = old ? old->gdb_port : THREAD_NULL; | |
323 | ||
324 | inferior_debug | |
325 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:%x old_id:%x\n"), | |
326 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); | |
a80b95ba TG |
327 | |
328 | if (old_id == new_id) | |
329 | { | |
330 | /* Thread still exist. */ | |
bb00b29d | 331 | VEC_safe_push (darwin_thread_t, thread_vec, old); |
a80b95ba TG |
332 | new_ix++; |
333 | old_ix++; | |
334 | ||
335 | kret = mach_port_deallocate (gdb_task, old_id); | |
336 | MACH_CHECK_ERROR (kret); | |
337 | continue; | |
338 | } | |
bb00b29d TG |
339 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
340 | { | |
341 | /* Ignore dead ports. | |
342 | In some weird cases, we might get dead ports. They should | |
343 | correspond to dead thread so they could safely be ignored. */ | |
344 | new_ix++; | |
345 | continue; | |
346 | } | |
347 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
348 | { |
349 | /* A thread was created. */ | |
350 | struct thread_info *tp; | |
bb00b29d | 351 | struct private_thread_info *pti; |
a80b95ba | 352 | |
bb00b29d TG |
353 | pti = XZALLOC (struct private_thread_info); |
354 | pti->gdb_port = new_id; | |
355 | pti->msg_state = DARWIN_RUNNING; | |
356 | ||
357 | /* Add a new thread unless this is the first one ever met. */ | |
358 | if (!(old_nbr == 0 && new_ix == 0)) | |
359 | tp = add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti); | |
360 | else | |
361 | { | |
362 | tp = find_thread_ptid (ptid_build (inf->pid, 0, 0)); | |
363 | gdb_assert (tp); | |
364 | tp->private = pti; | |
365 | } | |
366 | VEC_safe_push (darwin_thread_t, thread_vec, pti); | |
a80b95ba TG |
367 | new_ix++; |
368 | continue; | |
369 | } | |
bb00b29d | 370 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
371 | { |
372 | /* A thread was removed. */ | |
373 | delete_thread (ptid_build (inf->pid, 0, old_id)); | |
374 | kret = mach_port_deallocate (gdb_task, old_id); | |
375 | MACH_CHECK_ERROR (kret); | |
376 | old_ix++; | |
bb00b29d | 377 | continue; |
a80b95ba | 378 | } |
f3574227 | 379 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
380 | } |
381 | ||
bb00b29d TG |
382 | if (darwin_inf->threads) |
383 | VEC_free (darwin_thread_t, darwin_inf->threads); | |
384 | darwin_inf->threads = thread_vec; | |
a80b95ba TG |
385 | |
386 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, | |
387 | new_nbr * sizeof (int)); | |
388 | MACH_CHECK_ERROR (kret); | |
389 | } | |
390 | ||
bb00b29d TG |
391 | static int |
392 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 393 | { |
bb00b29d TG |
394 | return inf->private->task == *(task_t*)port_ptr; |
395 | } | |
a80b95ba | 396 | |
bb00b29d TG |
397 | static int |
398 | find_inferior_notify_it (struct inferior *inf, void *port_ptr) | |
399 | { | |
400 | return inf->private->notify_port == *(task_t*)port_ptr; | |
a80b95ba TG |
401 | } |
402 | ||
bb00b29d TG |
403 | /* Return an inferior by task port. */ |
404 | static struct inferior * | |
405 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 406 | { |
bb00b29d TG |
407 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
408 | } | |
a80b95ba | 409 | |
bb00b29d TG |
410 | /* Return an inferior by notification port. */ |
411 | static struct inferior * | |
412 | darwin_find_inferior_by_notify (mach_port_t port) | |
413 | { | |
414 | return iterate_over_inferiors (&find_inferior_notify_it, &port); | |
415 | } | |
a80b95ba | 416 | |
bb00b29d TG |
417 | /* Return a thread by port. */ |
418 | static darwin_thread_t * | |
419 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
420 | { | |
421 | darwin_thread_t *t; | |
422 | int k; | |
423 | ||
424 | for (k = 0; | |
425 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
426 | k++) | |
427 | if (t->gdb_port == thread) | |
428 | return t; | |
429 | return NULL; | |
430 | } | |
a80b95ba | 431 | |
bb00b29d | 432 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 433 | |
bb00b29d TG |
434 | static void |
435 | darwin_suspend_inferior (struct inferior *inf) | |
436 | { | |
437 | if (!inf->private->suspended) | |
a80b95ba | 438 | { |
bb00b29d | 439 | kern_return_t kret; |
a80b95ba | 440 | |
bb00b29d TG |
441 | kret = task_suspend (inf->private->task); |
442 | MACH_CHECK_ERROR (kret); | |
a80b95ba | 443 | |
bb00b29d TG |
444 | inf->private->suspended = 1; |
445 | } | |
446 | } | |
a80b95ba | 447 | |
bb00b29d | 448 | /* Resume an inferior at Mach level. */ |
a80b95ba | 449 | |
bb00b29d TG |
450 | static void |
451 | darwin_resume_inferior (struct inferior *inf) | |
452 | { | |
453 | if (inf->private->suspended) | |
454 | { | |
455 | kern_return_t kret; | |
a80b95ba | 456 | |
bb00b29d TG |
457 | kret = task_resume (inf->private->task); |
458 | MACH_CHECK_ERROR (kret); | |
459 | ||
460 | inf->private->suspended = 0; | |
a80b95ba TG |
461 | } |
462 | } | |
463 | ||
bb00b29d TG |
464 | /* Iterator functions. */ |
465 | ||
466 | static int | |
467 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 468 | { |
bb00b29d TG |
469 | darwin_suspend_inferior (inf); |
470 | darwin_check_new_threads (inf); | |
471 | return 0; | |
472 | } | |
473 | ||
474 | static int | |
475 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
476 | { | |
477 | darwin_resume_inferior (inf); | |
478 | return 0; | |
a80b95ba TG |
479 | } |
480 | ||
bb00b29d TG |
481 | static void |
482 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
483 | { | |
484 | printf_unfiltered (_("message header:\n")); | |
485 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
486 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
487 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
488 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
489 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
490 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
491 | ||
492 | if (disp_body) | |
493 | { | |
494 | const unsigned char *data; | |
495 | const unsigned long *ldata; | |
496 | int size; | |
497 | int i; | |
498 | ||
499 | data = (unsigned char *)(hdr + 1); | |
500 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
501 | ||
502 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
503 | { | |
504 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
505 | mach_msg_port_descriptor_t *desc = | |
506 | (mach_msg_port_descriptor_t *)(bod + 1); | |
507 | int k; | |
508 | NDR_record_t *ndr; | |
509 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
510 | bod->msgh_descriptor_count); | |
511 | data += sizeof (mach_msg_body_t); | |
512 | size -= sizeof (mach_msg_body_t); | |
513 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
514 | switch (desc[k].type) | |
515 | { | |
516 | case MACH_MSG_PORT_DESCRIPTOR: | |
517 | printf_unfiltered | |
518 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
519 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
520 | break; | |
521 | default: | |
522 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
523 | k, desc[k].type); | |
524 | break; | |
525 | } | |
526 | data += bod->msgh_descriptor_count | |
527 | * sizeof (mach_msg_port_descriptor_t); | |
528 | size -= bod->msgh_descriptor_count | |
529 | * sizeof (mach_msg_port_descriptor_t); | |
530 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
531 | printf_unfiltered | |
532 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
533 | "int=%02x char=%02x float=%02x\n"), | |
534 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
535 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
536 | data += sizeof (NDR_record_t); | |
537 | size -= sizeof (NDR_record_t); | |
538 | } | |
539 | ||
540 | printf_unfiltered (_(" data:")); | |
541 | ldata = (const unsigned long *)data; | |
542 | for (i = 0; i < size / sizeof (unsigned long); i++) | |
543 | printf_unfiltered (" %08lx", ldata[i]); | |
544 | printf_unfiltered (_("\n")); | |
545 | } | |
546 | } | |
547 | ||
548 | static int | |
549 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
550 | struct inferior **pinf, | |
551 | darwin_thread_t **pthread) | |
a80b95ba | 552 | { |
bb00b29d TG |
553 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
554 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
555 | NDR_record_t *ndr; | |
556 | integer_t *data; | |
557 | struct inferior *inf; | |
558 | darwin_thread_t *thread; | |
559 | task_t task_port; | |
560 | thread_t thread_port; | |
a80b95ba | 561 | kern_return_t kret; |
bb00b29d | 562 | int i; |
a80b95ba | 563 | |
bb00b29d TG |
564 | /* Check message identifier. 2401 is exc. */ |
565 | if (hdr->msgh_id != 2401) | |
566 | return -1; | |
567 | ||
568 | /* Check message header. */ | |
569 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
570 | return -1; | |
571 | ||
572 | /* Check descriptors. */ | |
573 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
574 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
575 | || bod->msgh_descriptor_count != 2 | |
576 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
577 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
578 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
579 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
580 | return -1; | |
581 | ||
582 | /* Check data representation. */ | |
583 | ndr = (NDR_record_t *)(desc + 2); | |
584 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
585 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
586 | || ndr->mig_encoding != NDR_record.mig_encoding | |
587 | || ndr->int_rep != NDR_record.int_rep | |
588 | || ndr->char_rep != NDR_record.char_rep | |
589 | || ndr->float_rep != NDR_record.float_rep) | |
590 | return -1; | |
591 | ||
592 | /* Ok, the hard work. */ | |
593 | data = (integer_t *)(ndr + 1); | |
594 | ||
595 | /* Find process by port. */ | |
596 | task_port = desc[1].name; | |
597 | thread_port = desc[0].name; | |
598 | inf = darwin_find_inferior_by_task (task_port); | |
599 | if (inf == NULL) | |
600 | return -1; | |
601 | *pinf = inf; | |
602 | ||
603 | /* Find thread by port. */ | |
604 | /* Check for new threads. Do it early so that the port in the exception | |
605 | message can be deallocated. */ | |
606 | darwin_check_new_threads (inf); | |
607 | ||
608 | /* We got new rights to the task and the thread. Get rid of them. */ | |
a80b95ba TG |
609 | kret = mach_port_deallocate (mach_task_self (), task_port); |
610 | MACH_CHECK_ERROR (kret); | |
611 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
612 | MACH_CHECK_ERROR (kret); | |
613 | ||
bb00b29d TG |
614 | thread = darwin_find_thread (inf, thread_port); |
615 | if (thread == NULL) | |
616 | return -1; | |
617 | *pthread = thread; | |
618 | ||
484a26a8 TG |
619 | /* The thread should be running. However we have observed cases where a thread |
620 | got a SIGTTIN message after being stopped. */ | |
621 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); | |
622 | ||
bb00b29d | 623 | /* Finish decoding. */ |
bb00b29d TG |
624 | thread->event.header = *hdr; |
625 | thread->event.thread_port = thread_port; | |
626 | thread->event.task_port = task_port; | |
627 | thread->event.ex_type = data[0]; | |
628 | thread->event.data_count = data[1]; | |
629 | ||
630 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
631 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
632 | + data[1] * sizeof (integer_t))) | |
633 | return -1; | |
634 | for (i = 0; i < data[1]; i++) | |
635 | thread->event.ex_data[i] = data[2 + i]; | |
636 | ||
637 | thread->msg_state = DARWIN_MESSAGE; | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
642 | static void | |
643 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
644 | integer_t code) | |
645 | { | |
646 | mach_msg_header_t *rh = &reply->Head; | |
647 | rh->msgh_bits = MACH_MSGH_BITS(MACH_MSGH_BITS_REMOTE(hdr->msgh_bits), 0); | |
648 | rh->msgh_remote_port = hdr->msgh_remote_port; | |
649 | rh->msgh_size = (mach_msg_size_t)sizeof(mig_reply_error_t); | |
650 | rh->msgh_local_port = MACH_PORT_NULL; | |
651 | rh->msgh_id = hdr->msgh_id + 100; | |
652 | ||
653 | reply->NDR = NDR_record; | |
654 | reply->RetCode = code; | |
a80b95ba TG |
655 | } |
656 | ||
bb00b29d TG |
657 | static void |
658 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
659 | { |
660 | kern_return_t kret; | |
bb00b29d | 661 | mig_reply_error_t reply; |
a80b95ba | 662 | |
bb00b29d TG |
663 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
664 | ||
665 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
666 | reply.Head.msgh_size, 0, | |
667 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
668 | MACH_PORT_NULL); | |
a80b95ba TG |
669 | MACH_CHECK_ERROR (kret); |
670 | ||
bb00b29d TG |
671 | inf->private->pending_messages--; |
672 | } | |
673 | ||
674 | static void | |
675 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
676 | int step, int nsignal) | |
677 | { | |
678 | kern_return_t kret; | |
679 | int res; | |
680 | ||
a80b95ba | 681 | inferior_debug |
bb00b29d TG |
682 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
683 | thread->msg_state, thread->gdb_port, step, nsignal); | |
684 | ||
685 | switch (thread->msg_state) | |
a80b95ba | 686 | { |
bb00b29d TG |
687 | case DARWIN_MESSAGE: |
688 | if (thread->event.ex_type == EXC_SOFTWARE | |
689 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
690 | { | |
691 | /* Either deliver a new signal or cancel the signal received. */ | |
692 | res = PTRACE (PT_THUPDATE, inf->pid, | |
693 | (void *)(uintptr_t)thread->gdb_port, nsignal); | |
694 | if (res < 0) | |
695 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
696 | } | |
697 | else if (nsignal) | |
698 | { | |
699 | /* Note: ptrace is allowed only if the process is stopped. | |
700 | Directly send the signal to the thread. */ | |
701 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
702 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), | |
703 | thread->gdb_port, nsignal, res); | |
704 | thread->signaled = 1; | |
705 | } | |
706 | ||
707 | /* Set single step. */ | |
708 | inferior_debug (4, _("darwin_set_sstep (thread=%x, enable=%d)\n"), | |
709 | thread->gdb_port, step); | |
710 | darwin_set_sstep (thread->gdb_port, step); | |
711 | thread->single_step = step; | |
712 | ||
713 | darwin_send_reply (inf, thread); | |
714 | thread->msg_state = DARWIN_RUNNING; | |
715 | break; | |
716 | ||
717 | case DARWIN_RUNNING: | |
718 | break; | |
719 | ||
720 | case DARWIN_STOPPED: | |
721 | kret = thread_resume (thread->gdb_port); | |
722 | MACH_CHECK_ERROR (kret); | |
723 | ||
724 | thread->msg_state = DARWIN_RUNNING; | |
725 | break; | |
a80b95ba | 726 | } |
bb00b29d | 727 | } |
a80b95ba | 728 | |
bb00b29d | 729 | /* Resume all threads of the inferior. */ |
a80b95ba | 730 | |
bb00b29d TG |
731 | static void |
732 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
733 | { | |
734 | darwin_thread_t *thread; | |
735 | int k; | |
736 | ||
737 | for (k = 0; | |
738 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); | |
739 | k++) | |
740 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
741 | } |
742 | ||
bb00b29d | 743 | struct resume_inferior_threads_param |
a80b95ba | 744 | { |
bb00b29d TG |
745 | int step; |
746 | int nsignal; | |
747 | }; | |
748 | ||
749 | static int | |
750 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
751 | { | |
752 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
753 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
754 | ||
755 | darwin_resume_inferior_threads (inf, step, nsignal); | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | /* Suspend all threads of INF. */ | |
761 | ||
762 | static void | |
763 | darwin_suspend_inferior_threads (struct inferior *inf) | |
764 | { | |
765 | darwin_thread_t *thread; | |
a80b95ba | 766 | kern_return_t kret; |
bb00b29d TG |
767 | int k; |
768 | ||
769 | for (k = 0; | |
770 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); | |
771 | k++) | |
772 | switch (thread->msg_state) | |
773 | { | |
774 | case DARWIN_STOPPED: | |
775 | case DARWIN_MESSAGE: | |
776 | break; | |
777 | case DARWIN_RUNNING: | |
778 | kret = thread_suspend (thread->gdb_port); | |
779 | MACH_CHECK_ERROR (kret); | |
780 | thread->msg_state = DARWIN_STOPPED; | |
781 | break; | |
782 | } | |
783 | } | |
a80b95ba | 784 | |
bb00b29d TG |
785 | static void |
786 | darwin_resume (ptid_t ptid, int step, enum target_signal signal) | |
787 | { | |
788 | struct target_waitstatus status; | |
789 | int pid; | |
a80b95ba | 790 | |
bb00b29d TG |
791 | kern_return_t kret; |
792 | int res; | |
793 | int nsignal; | |
794 | struct inferior *inf; | |
a80b95ba | 795 | |
bb00b29d TG |
796 | inferior_debug |
797 | (2, _("darwin_resume: pid=%d, tid=0x%x, step=%d, signal=%d\n"), | |
798 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); | |
799 | ||
800 | if (signal == TARGET_SIGNAL_0) | |
801 | nsignal = 0; | |
802 | else | |
803 | nsignal = target_signal_to_host (signal); | |
a80b95ba | 804 | |
bb00b29d TG |
805 | /* Don't try to single step all threads. */ |
806 | if (step) | |
807 | ptid = inferior_ptid; | |
808 | ||
809 | /* minus_one_ptid is RESUME_ALL. */ | |
810 | if (ptid_equal (ptid, minus_one_ptid)) | |
a80b95ba | 811 | { |
bb00b29d TG |
812 | struct resume_inferior_threads_param param; |
813 | ||
814 | param.nsignal = nsignal; | |
815 | param.step = step; | |
a80b95ba | 816 | |
bb00b29d TG |
817 | /* Resume threads. */ |
818 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
819 | /* Resume tasks. */ | |
820 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
821 | } | |
822 | else | |
a80b95ba | 823 | { |
bb00b29d TG |
824 | struct inferior *inf = find_inferior_pid (ptid_get_pid (ptid)); |
825 | long tid = ptid_get_tid (ptid); | |
826 | ||
827 | /* Stop the inferior (should be useless). */ | |
828 | darwin_suspend_inferior (inf); | |
829 | ||
830 | if (tid == 0) | |
831 | darwin_resume_inferior_threads (inf, step, nsignal); | |
832 | else | |
833 | { | |
834 | darwin_thread_t *thread; | |
835 | ||
836 | /* Suspend threads of the task. */ | |
837 | darwin_suspend_inferior_threads (inf); | |
838 | ||
839 | /* Resume the selected thread. */ | |
840 | thread = darwin_find_thread (inf, tid); | |
841 | gdb_assert (thread); | |
842 | darwin_resume_thread (inf, thread, step, nsignal); | |
843 | } | |
844 | ||
845 | /* Resume the task. */ | |
846 | darwin_resume_inferior (inf); | |
a80b95ba | 847 | } |
bb00b29d | 848 | } |
a80b95ba | 849 | |
bb00b29d TG |
850 | static void |
851 | darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, | |
852 | enum target_signal signal) | |
853 | { | |
854 | return darwin_resume (ptid, step, signal); | |
855 | } | |
856 | ||
857 | static ptid_t | |
858 | darwin_decode_message (mach_msg_header_t *hdr, | |
859 | darwin_thread_t **pthread, | |
860 | struct inferior **pinf, | |
861 | struct target_waitstatus *status) | |
862 | { | |
863 | darwin_thread_t *thread; | |
864 | struct inferior *inf; | |
a80b95ba TG |
865 | |
866 | /* Exception message. */ | |
867 | if (hdr->msgh_local_port == darwin_ex_port) | |
868 | { | |
bb00b29d TG |
869 | int res; |
870 | ||
871 | /* Decode message. */ | |
872 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
873 | ||
874 | if (res < 0) | |
a80b95ba | 875 | { |
bb00b29d TG |
876 | /* Should not happen... */ |
877 | printf_unfiltered (_("darwin_wait: ill-formatted message (id=%x)\n"), | |
a80b95ba | 878 | hdr->msgh_id); |
bb00b29d | 879 | /* FIXME: send a failure reply? */ |
a80b95ba TG |
880 | status->kind = TARGET_WAITKIND_SPURIOUS; |
881 | return minus_one_ptid; | |
882 | } | |
bb00b29d TG |
883 | *pinf = inf; |
884 | *pthread = thread; | |
885 | inf->private->pending_messages++; | |
a80b95ba TG |
886 | |
887 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
888 | thread->msg_state = DARWIN_MESSAGE; |
889 | ||
890 | inferior_debug (4, _("darwin_wait: thread=%x, got %s\n"), | |
891 | thread->gdb_port, | |
892 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 893 | |
bb00b29d | 894 | switch (thread->event.ex_type) |
a80b95ba TG |
895 | { |
896 | case EXC_BAD_ACCESS: | |
897 | status->value.sig = TARGET_EXC_BAD_ACCESS; | |
898 | break; | |
899 | case EXC_BAD_INSTRUCTION: | |
900 | status->value.sig = TARGET_EXC_BAD_INSTRUCTION; | |
901 | break; | |
902 | case EXC_ARITHMETIC: | |
903 | status->value.sig = TARGET_EXC_ARITHMETIC; | |
904 | break; | |
905 | case EXC_EMULATION: | |
906 | status->value.sig = TARGET_EXC_EMULATION; | |
907 | break; | |
908 | case EXC_SOFTWARE: | |
bb00b29d | 909 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 910 | { |
bb00b29d TG |
911 | status->value.sig = |
912 | target_signal_from_host (thread->event.ex_data[1]); | |
913 | inferior_debug (5, _(" (signal %d: %s)\n"), | |
914 | thread->event.ex_data[1], | |
a80b95ba | 915 | target_signal_to_name (status->value.sig)); |
bb00b29d TG |
916 | |
917 | /* If the thread is stopped because it has received a signal | |
918 | that gdb has just sent, continue. */ | |
919 | if (thread->signaled) | |
920 | { | |
921 | thread->signaled = 0; | |
922 | darwin_send_reply (inf, thread); | |
923 | thread->msg_state = DARWIN_RUNNING; | |
924 | status->kind = TARGET_WAITKIND_IGNORE; | |
925 | } | |
a80b95ba TG |
926 | } |
927 | else | |
bb00b29d | 928 | status->value.sig = TARGET_EXC_SOFTWARE; |
a80b95ba TG |
929 | break; |
930 | case EXC_BREAKPOINT: | |
931 | /* Many internal GDB routines expect breakpoints to be reported | |
932 | as TARGET_SIGNAL_TRAP, and will report TARGET_EXC_BREAKPOINT | |
0963b4bd | 933 | as a spurious signal. */ |
a80b95ba TG |
934 | status->value.sig = TARGET_SIGNAL_TRAP; |
935 | break; | |
936 | default: | |
937 | status->value.sig = TARGET_SIGNAL_UNKNOWN; | |
938 | break; | |
939 | } | |
940 | ||
bb00b29d TG |
941 | return ptid_build (inf->pid, 0, thread->gdb_port); |
942 | } | |
943 | ||
944 | *pinf = NULL; | |
945 | *pthread = NULL; | |
946 | ||
947 | inf = darwin_find_inferior_by_notify (hdr->msgh_local_port); | |
948 | if (inf != NULL) | |
949 | { | |
950 | if (!inf->private->no_ptrace) | |
951 | { | |
952 | pid_t res; | |
953 | int wstatus; | |
954 | ||
955 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
956 | if (res < 0 || res != inf->pid) | |
957 | { | |
958 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
959 | res, safe_strerror (errno)); | |
960 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
961 | return minus_one_ptid; | |
962 | } | |
963 | if (WIFEXITED (wstatus)) | |
964 | { | |
965 | status->kind = TARGET_WAITKIND_EXITED; | |
966 | status->value.integer = WEXITSTATUS (wstatus); | |
967 | } | |
968 | else | |
969 | { | |
970 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
971 | status->value.sig = WTERMSIG (wstatus); | |
972 | } | |
973 | ||
974 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=%x\n"), | |
975 | res, wstatus); | |
976 | ||
977 | /* Looks necessary on Leopard and harmless... */ | |
978 | wait4 (inf->pid, &wstatus, 0, NULL); | |
979 | ||
980 | return ptid_build (inf->pid, 0, 0); | |
981 | } | |
982 | else | |
983 | { | |
984 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); | |
985 | status->kind = TARGET_WAITKIND_EXITED; | |
986 | status->value.integer = 0; /* Don't know. */ | |
987 | return ptid_build (inf->pid, 0, 0); | |
988 | } | |
989 | } | |
990 | ||
991 | printf_unfiltered (_("Bad local-port: %x\n"), hdr->msgh_local_port); | |
992 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
993 | return minus_one_ptid; | |
994 | } | |
995 | ||
996 | static int | |
997 | cancel_breakpoint (ptid_t ptid) | |
998 | { | |
0963b4bd | 999 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1000 | the current event, eventually we will resume this thread, and this |
1001 | breakpoint will trap again. | |
1002 | ||
1003 | If we do not do this, then we run the risk that the user will | |
1004 | delete or disable the breakpoint, but the thread will have already | |
1005 | tripped on it. */ | |
1006 | ||
1007 | struct regcache *regcache = get_thread_regcache (ptid); | |
1008 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1009 | CORE_ADDR pc; | |
a80b95ba | 1010 | |
bb00b29d | 1011 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
40625c9d | 1012 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc)) |
bb00b29d TG |
1013 | { |
1014 | inferior_debug (4, "cancel_breakpoint for thread %x\n", | |
1015 | ptid_get_tid (ptid)); | |
1016 | ||
1017 | /* Back up the PC if necessary. */ | |
1018 | if (gdbarch_decr_pc_after_break (gdbarch)) | |
1019 | regcache_write_pc (regcache, pc); | |
1020 | ||
1021 | return 1; | |
a80b95ba | 1022 | } |
bb00b29d TG |
1023 | return 0; |
1024 | } | |
1025 | ||
1026 | static ptid_t | |
1027 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1028 | { | |
1029 | kern_return_t kret; | |
1030 | union | |
1031 | { | |
1032 | mach_msg_header_t hdr; | |
1033 | char data[0x100]; | |
1034 | } msgin; | |
1035 | mach_msg_header_t *hdr = &msgin.hdr; | |
1036 | ptid_t res; | |
1037 | darwin_thread_t *thread; | |
1038 | struct inferior *inf; | |
1039 | ||
1040 | inferior_debug | |
1041 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
1042 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
1043 | ||
1044 | /* Handle fake stop events at first. */ | |
1045 | if (darwin_inf_fake_stop != NULL) | |
1046 | { | |
1047 | inf = darwin_inf_fake_stop; | |
1048 | darwin_inf_fake_stop = NULL; | |
1049 | ||
1050 | status->kind = TARGET_WAITKIND_STOPPED; | |
1051 | status->value.sig = TARGET_SIGNAL_TRAP; | |
1052 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); | |
1053 | thread->msg_state = DARWIN_STOPPED; | |
1054 | return ptid_build (inf->pid, 0, thread->gdb_port); | |
1055 | } | |
1056 | ||
1057 | do | |
1058 | { | |
1059 | /* set_sigint_trap (); */ | |
1060 | ||
1061 | /* Wait for a message. */ | |
1062 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1063 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1064 | ||
1065 | /* clear_sigint_trap (); */ | |
1066 | ||
1067 | if (kret == MACH_RCV_INTERRUPTED) | |
1068 | { | |
1069 | status->kind = TARGET_WAITKIND_IGNORE; | |
1070 | return minus_one_ptid; | |
1071 | } | |
1072 | ||
1073 | if (kret != MACH_MSG_SUCCESS) | |
1074 | { | |
1075 | inferior_debug (5, _("mach_msg: ret=%x\n"), kret); | |
1076 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
1077 | return minus_one_ptid; | |
1078 | } | |
1079 | ||
1080 | /* Debug: display message. */ | |
1081 | if (darwin_debug_flag > 10) | |
1082 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1083 | ||
1084 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
1085 | ||
1086 | if (inf == NULL) | |
1087 | return res; | |
1088 | } | |
1089 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1090 | ||
1091 | /* Stop all tasks. */ | |
1092 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1093 | ||
1094 | /* Read pending messages. */ | |
1095 | while (1) | |
a80b95ba | 1096 | { |
bb00b29d TG |
1097 | struct target_waitstatus status2; |
1098 | ptid_t ptid2; | |
1099 | ||
1100 | kret = mach_msg (&msgin.hdr, | |
1101 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1102 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1103 | ||
1104 | if (kret == MACH_RCV_TIMED_OUT) | |
1105 | break; | |
1106 | if (kret != MACH_MSG_SUCCESS) | |
1107 | { | |
1108 | inferior_debug | |
1109 | (5, _("darwin_wait: mach_msg(pending) ret=%x\n"), kret); | |
1110 | break; | |
1111 | } | |
1112 | ||
1113 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); | |
a80b95ba | 1114 | |
bb00b29d TG |
1115 | if (inf != NULL && thread != NULL |
1116 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1117 | { |
bb00b29d TG |
1118 | if (thread->single_step |
1119 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) | |
1120 | { | |
1121 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1122 | darwin_send_reply (inf, thread); | |
1123 | thread->msg_state = DARWIN_RUNNING; | |
1124 | } | |
1125 | else | |
1126 | inferior_debug | |
1127 | (3, _("darwin_wait: thread %x hit a non-gdb breakpoint\n"), | |
1128 | thread->gdb_port); | |
a80b95ba | 1129 | } |
bb00b29d TG |
1130 | else |
1131 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1132 | } | |
1133 | return res; | |
1134 | } | |
a80b95ba | 1135 | |
bb00b29d TG |
1136 | static ptid_t |
1137 | darwin_wait_to (struct target_ops *ops, | |
1138 | ptid_t ptid, struct target_waitstatus *status, int options) | |
1139 | { | |
1140 | return darwin_wait (ptid, status); | |
1141 | } | |
a80b95ba | 1142 | |
bb00b29d TG |
1143 | static void |
1144 | darwin_stop (ptid_t t) | |
1145 | { | |
1146 | struct inferior *inf = current_inferior (); | |
a80b95ba | 1147 | |
bb00b29d TG |
1148 | /* FIXME: handle in no_ptrace mode. */ |
1149 | gdb_assert (!inf->private->no_ptrace); | |
1150 | kill (inf->pid, SIGINT); | |
a80b95ba TG |
1151 | } |
1152 | ||
1153 | static void | |
1154 | darwin_mourn_inferior (struct target_ops *ops) | |
1155 | { | |
1156 | struct inferior *inf = current_inferior (); | |
1157 | kern_return_t kret; | |
1158 | mach_port_t prev; | |
1159 | int i; | |
1160 | ||
1161 | unpush_target (darwin_ops); | |
1162 | ||
1163 | /* Deallocate threads. */ | |
bb00b29d | 1164 | if (inf->private->threads) |
a80b95ba TG |
1165 | { |
1166 | int k; | |
bb00b29d TG |
1167 | darwin_thread_t *t; |
1168 | for (k = 0; | |
1169 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1170 | k++) | |
a80b95ba | 1171 | { |
bb00b29d | 1172 | kret = mach_port_deallocate (gdb_task, t->gdb_port); |
a80b95ba TG |
1173 | MACH_CHECK_ERROR (kret); |
1174 | } | |
bb00b29d TG |
1175 | VEC_free (darwin_thread_t, inf->private->threads); |
1176 | inf->private->threads = NULL; | |
a80b95ba TG |
1177 | } |
1178 | ||
bb00b29d TG |
1179 | kret = mach_port_move_member (gdb_task, |
1180 | inf->private->notify_port, MACH_PORT_NULL); | |
1181 | gdb_assert (kret == KERN_SUCCESS); | |
1182 | ||
1183 | kret = mach_port_request_notification (gdb_task, inf->private->task, | |
a80b95ba | 1184 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1185 | MACH_PORT_NULL, |
a80b95ba TG |
1186 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1187 | &prev); | |
1188 | /* This can fail if the task is dead. */ | |
bb00b29d TG |
1189 | inferior_debug (4, "task=%x, prev=%x, notify_port=%x\n", |
1190 | inf->private->task, prev, inf->private->notify_port); | |
1191 | ||
a80b95ba TG |
1192 | if (kret == KERN_SUCCESS) |
1193 | { | |
1194 | kret = mach_port_deallocate (gdb_task, prev); | |
1195 | MACH_CHECK_ERROR (kret); | |
1196 | } | |
1197 | ||
bb00b29d TG |
1198 | kret = mach_port_destroy (gdb_task, inf->private->notify_port); |
1199 | MACH_CHECK_ERROR (kret); | |
1200 | ||
1201 | ||
a80b95ba | 1202 | /* Deallocate saved exception ports. */ |
bb00b29d | 1203 | for (i = 0; i < inf->private->exception_info.count; i++) |
a80b95ba TG |
1204 | { |
1205 | kret = mach_port_deallocate | |
bb00b29d | 1206 | (gdb_task, inf->private->exception_info.ports[i]); |
a80b95ba TG |
1207 | MACH_CHECK_ERROR (kret); |
1208 | } | |
bb00b29d | 1209 | inf->private->exception_info.count = 0; |
a80b95ba | 1210 | |
bb00b29d | 1211 | kret = mach_port_deallocate (gdb_task, inf->private->task); |
a80b95ba TG |
1212 | MACH_CHECK_ERROR (kret); |
1213 | ||
bb00b29d TG |
1214 | xfree (inf->private); |
1215 | inf->private = NULL; | |
a80b95ba TG |
1216 | |
1217 | generic_mourn_inferior (); | |
1218 | } | |
1219 | ||
1220 | static void | |
bb00b29d | 1221 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1222 | { |
bb00b29d TG |
1223 | int k; |
1224 | darwin_thread_t *t; | |
a80b95ba | 1225 | |
bb00b29d TG |
1226 | for (k = 0; |
1227 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1228 | k++) | |
1229 | { | |
1230 | if (t->msg_state == DARWIN_MESSAGE) | |
1231 | darwin_resume_thread (inf, t, 0, 0); | |
1232 | } | |
a80b95ba TG |
1233 | } |
1234 | ||
1235 | static void | |
bb00b29d | 1236 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1237 | { |
1238 | struct target_waitstatus wstatus; | |
1239 | ptid_t ptid; | |
1240 | kern_return_t kret; | |
1241 | int status; | |
1242 | int res; | |
1243 | ||
bb00b29d | 1244 | gdb_assert (inf != NULL); |
a80b95ba | 1245 | |
bb00b29d | 1246 | darwin_suspend_inferior (inf); |
a80b95ba | 1247 | |
bb00b29d | 1248 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1249 | |
bb00b29d TG |
1250 | if (inf->private->no_ptrace) |
1251 | return; | |
a80b95ba | 1252 | |
bb00b29d TG |
1253 | res = kill (inf->pid, SIGSTOP); |
1254 | if (res != 0) | |
b37520b6 | 1255 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1256 | |
bb00b29d TG |
1257 | /* Wait until the process is really stopped. */ |
1258 | while (1) | |
a80b95ba | 1259 | { |
bb00b29d TG |
1260 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1261 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
1262 | && wstatus.value.sig == TARGET_SIGNAL_STOP) | |
1263 | break; | |
a80b95ba TG |
1264 | } |
1265 | } | |
1266 | ||
1267 | static kern_return_t | |
1268 | darwin_save_exception_ports (darwin_inferior *inf) | |
1269 | { | |
1270 | kern_return_t kret; | |
1271 | ||
1272 | inf->exception_info.count = | |
1273 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1274 | ||
1275 | kret = task_get_exception_ports | |
1276 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1277 | &inf->exception_info.count, inf->exception_info.ports, | |
1278 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1279 | return kret; | |
1280 | } | |
1281 | ||
1282 | static kern_return_t | |
1283 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1284 | { | |
1285 | int i; | |
1286 | kern_return_t kret; | |
1287 | ||
1288 | for (i = 0; i < inf->exception_info.count; i++) | |
1289 | { | |
1290 | kret = task_set_exception_ports | |
1291 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1292 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1293 | if (kret != KERN_SUCCESS) | |
1294 | return kret; | |
1295 | } | |
1296 | ||
1297 | return KERN_SUCCESS; | |
1298 | } | |
1299 | ||
1300 | static void | |
bb00b29d TG |
1301 | darwin_kill_inferior (struct target_ops *ops) |
1302 | { | |
1303 | struct inferior *inf = current_inferior (); | |
1304 | struct target_waitstatus wstatus; | |
1305 | ptid_t ptid; | |
1306 | kern_return_t kret; | |
1307 | int status; | |
1308 | int res; | |
1309 | ||
1310 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1311 | return; | |
1312 | ||
1313 | gdb_assert (inf != NULL); | |
1314 | ||
1315 | if (!inf->private->no_ptrace) | |
1316 | { | |
1317 | darwin_stop_inferior (inf); | |
1318 | ||
1319 | res = PTRACE (PT_KILL, inf->pid, 0, 0); | |
a7aa0d73 JB |
1320 | if (res != 0) |
1321 | warning (_("Failed to kill inferior: ptrace returned %d " | |
1322 | "[%s] (pid=%d)"), | |
1323 | res, safe_strerror (errno), inf->pid); | |
bb00b29d TG |
1324 | |
1325 | darwin_reply_to_all_pending_messages (inf); | |
1326 | ||
1327 | darwin_resume_inferior (inf); | |
1328 | ||
1329 | ptid = darwin_wait (inferior_ptid, &wstatus); | |
1330 | } | |
1331 | else | |
1332 | { | |
1333 | kret = darwin_restore_exception_ports (inf->private); | |
1334 | MACH_CHECK_ERROR (kret); | |
1335 | ||
1336 | darwin_reply_to_all_pending_messages (inf); | |
1337 | ||
1338 | darwin_resume_inferior (inf); | |
1339 | ||
1340 | res = kill (inf->pid, 9); | |
1341 | ||
1342 | ptid = darwin_wait (inferior_ptid, &wstatus); | |
1343 | } | |
1344 | ||
1345 | target_mourn_inferior (); | |
1346 | } | |
1347 | ||
1348 | static void | |
1349 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1350 | { |
a80b95ba TG |
1351 | kern_return_t kret; |
1352 | mach_port_t prev_port; | |
1353 | int traps_expected; | |
bb00b29d | 1354 | mach_port_t prev_not; |
a80b95ba TG |
1355 | exception_mask_t mask; |
1356 | ||
bb00b29d TG |
1357 | inf->private = XZALLOC (darwin_inferior); |
1358 | ||
1359 | kret = task_for_pid (gdb_task, inf->pid, &inf->private->task); | |
a80b95ba TG |
1360 | if (kret != KERN_SUCCESS) |
1361 | { | |
1362 | int status; | |
a80b95ba TG |
1363 | |
1364 | if (!inf->attach_flag) | |
1365 | { | |
bb00b29d TG |
1366 | kill (inf->pid, 9); |
1367 | waitpid (inf->pid, &status, 0); | |
a80b95ba TG |
1368 | } |
1369 | ||
1370 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
15c19d39 | 1371 | " (please check gdb is codesigned - see taskgated(8))"), |
bb00b29d | 1372 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
a80b95ba TG |
1373 | } |
1374 | ||
bb00b29d TG |
1375 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
1376 | inf->private->task, inf->pid); | |
a80b95ba TG |
1377 | |
1378 | if (darwin_ex_port == MACH_PORT_NULL) | |
1379 | { | |
1380 | /* Create a port to get exceptions. */ | |
1381 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1382 | &darwin_ex_port); | |
1383 | gdb_assert (kret == KERN_SUCCESS); | |
1384 | ||
1385 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, | |
1386 | MACH_MSG_TYPE_MAKE_SEND); | |
1387 | gdb_assert (kret == KERN_SUCCESS); | |
1388 | ||
1389 | /* Create a port set and put ex_port in it. */ | |
1390 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1391 | &darwin_port_set); | |
1392 | gdb_assert (kret == KERN_SUCCESS); | |
1393 | ||
1394 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); | |
1395 | gdb_assert (kret == KERN_SUCCESS); | |
bb00b29d | 1396 | } |
a80b95ba | 1397 | |
bb00b29d TG |
1398 | /* Create a port to be notified when the child task terminates. */ |
1399 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1400 | &inf->private->notify_port); | |
1401 | gdb_assert (kret == KERN_SUCCESS); | |
a80b95ba | 1402 | |
bb00b29d TG |
1403 | kret = mach_port_move_member (gdb_task, |
1404 | inf->private->notify_port, darwin_port_set); | |
1405 | gdb_assert (kret == KERN_SUCCESS); | |
a80b95ba | 1406 | |
bb00b29d | 1407 | kret = mach_port_request_notification (gdb_task, inf->private->task, |
a80b95ba | 1408 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1409 | inf->private->notify_port, |
a80b95ba | 1410 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
bb00b29d | 1411 | &prev_not); |
a80b95ba | 1412 | gdb_assert (kret == KERN_SUCCESS); |
bb00b29d | 1413 | gdb_assert (prev_not == MACH_PORT_NULL); |
a80b95ba | 1414 | |
bb00b29d | 1415 | kret = darwin_save_exception_ports (inf->private); |
a80b95ba TG |
1416 | gdb_assert (kret == KERN_SUCCESS); |
1417 | ||
1418 | /* Set exception port. */ | |
1419 | if (enable_mach_exceptions) | |
1420 | mask = EXC_MASK_ALL; | |
1421 | else | |
bb00b29d TG |
1422 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
1423 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, | |
1424 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); | |
a80b95ba TG |
1425 | gdb_assert (kret == KERN_SUCCESS); |
1426 | ||
1427 | push_target (darwin_ops); | |
1428 | } | |
1429 | ||
1430 | static void | |
bb00b29d | 1431 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1432 | { |
bb00b29d TG |
1433 | darwin_thread_t *thread; |
1434 | ptid_t new_ptid; | |
a80b95ba TG |
1435 | |
1436 | darwin_check_new_threads (inf); | |
1437 | ||
bb00b29d TG |
1438 | gdb_assert (inf->private->threads |
1439 | && VEC_length (darwin_thread_t, inf->private->threads) > 0); | |
1440 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); | |
1441 | ||
1442 | /* Note: fork_inferior automatically add a thead but it uses a wrong ptid. | |
1443 | Fix up. */ | |
1444 | new_ptid = ptid_build (inf->pid, 0, thread->gdb_port); | |
1445 | thread_change_ptid (inferior_ptid, new_ptid); | |
1446 | inferior_ptid = new_ptid; | |
1447 | } | |
1448 | ||
1449 | /* The child must synchronize with gdb: gdb must set the exception port | |
1450 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1451 | FIXME: is there a lighter way ? */ | |
1452 | static int ptrace_fds[2]; | |
1453 | ||
1454 | static void | |
1455 | darwin_ptrace_me (void) | |
1456 | { | |
1457 | int res; | |
1458 | char c; | |
1459 | ||
1460 | /* Close write end point. */ | |
1461 | close (ptrace_fds[1]); | |
1462 | ||
1463 | /* Wait until gdb is ready. */ | |
1464 | res = read (ptrace_fds[0], &c, 1); | |
1465 | gdb_assert (res == 0); | |
1466 | close (ptrace_fds[0]); | |
1467 | ||
1468 | /* Get rid of privileges. */ | |
1469 | setegid (getgid ()); | |
1470 | ||
1471 | /* Set TRACEME. */ | |
1472 | PTRACE (PT_TRACE_ME, 0, 0, 0); | |
1473 | ||
1474 | /* Redirect signals to exception port. */ | |
1475 | PTRACE (PT_SIGEXC, 0, 0, 0); | |
1476 | } | |
1477 | ||
1478 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1479 | static void | |
1480 | darwin_pre_ptrace (void) | |
1481 | { | |
1482 | if (pipe (ptrace_fds) != 0) | |
1483 | { | |
1484 | ptrace_fds[0] = -1; | |
1485 | ptrace_fds[1] = -1; | |
1486 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1487 | } | |
a80b95ba TG |
1488 | } |
1489 | ||
1490 | static void | |
1491 | darwin_ptrace_him (int pid) | |
1492 | { | |
1493 | task_t itask; | |
1494 | kern_return_t kret; | |
1495 | mach_port_t prev_port; | |
1496 | int traps_expected; | |
bb00b29d | 1497 | struct inferior *inf = current_inferior (); |
a80b95ba | 1498 | |
bb00b29d | 1499 | darwin_attach_pid (inf); |
a80b95ba TG |
1500 | |
1501 | /* Let's the child run. */ | |
1502 | close (ptrace_fds[0]); | |
1503 | close (ptrace_fds[1]); | |
1504 | ||
bb00b29d TG |
1505 | darwin_init_thread_list (inf); |
1506 | ||
a80b95ba TG |
1507 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
1508 | } | |
1509 | ||
e69860f1 TG |
1510 | static void |
1511 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1512 | { | |
1513 | posix_spawnattr_t attr; | |
1514 | short ps_flags = 0; | |
f00c55f8 | 1515 | int res; |
e69860f1 | 1516 | |
f00c55f8 TG |
1517 | res = posix_spawnattr_init (&attr); |
1518 | if (res != 0) | |
e69860f1 TG |
1519 | { |
1520 | fprintf_unfiltered | |
1521 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); | |
1522 | return; | |
1523 | } | |
1524 | ||
1525 | /* Do like execve: replace the image. */ | |
1526 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1527 | ||
1528 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1529 | kernel include files. */ | |
1530 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1531 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1532 | #endif | |
1533 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1534 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1535 | if (res != 0) | |
e69860f1 | 1536 | { |
f00c55f8 | 1537 | fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1538 | return; |
1539 | } | |
1540 | ||
1541 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1542 | } | |
1543 | ||
a80b95ba TG |
1544 | static void |
1545 | darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
1546 | char *allargs, char **env, int from_tty) | |
1547 | { | |
1548 | /* Do the hard work. */ | |
1549 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, darwin_ptrace_him, | |
e69860f1 | 1550 | darwin_pre_ptrace, NULL, darwin_execvp); |
bb00b29d | 1551 | |
a80b95ba TG |
1552 | /* Return now in case of error. */ |
1553 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1554 | return; | |
1555 | } | |
1556 | \f | |
1557 | ||
1558 | /* Attach to process PID, then initialize for debugging it | |
1559 | and wait for the trace-trap that results from attaching. */ | |
1560 | static void | |
1561 | darwin_attach (struct target_ops *ops, char *args, int from_tty) | |
1562 | { | |
1563 | pid_t pid; | |
1564 | pid_t pid2; | |
1565 | int wstatus; | |
1566 | int res; | |
1567 | struct inferior *inf; | |
bb00b29d | 1568 | kern_return_t kret; |
a80b95ba | 1569 | |
74164c56 | 1570 | pid = parse_pid_to_attach (args); |
a80b95ba | 1571 | |
74164c56 | 1572 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1573 | error (_("I refuse to debug myself!")); |
1574 | ||
1575 | if (from_tty) | |
bb00b29d TG |
1576 | { |
1577 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1578 | |
bb00b29d TG |
1579 | if (exec_file) |
1580 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
1581 | target_pid_to_str (pid_to_ptid (pid))); | |
1582 | else | |
1583 | printf_unfiltered (_("Attaching to %s\n"), | |
1584 | target_pid_to_str (pid_to_ptid (pid))); | |
1585 | ||
1586 | gdb_flush (gdb_stdout); | |
1587 | } | |
1588 | ||
1589 | if (pid == 0 || kill (pid, 0) < 0) | |
1590 | error (_("Can't attach to process %d: %s (%d)"), | |
1591 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1592 | |
bb00b29d | 1593 | inferior_ptid = pid_to_ptid (pid); |
6c95b8df PA |
1594 | inf = current_inferior (); |
1595 | inferior_appeared (inf, pid); | |
a80b95ba | 1596 | inf->attach_flag = 1; |
6c95b8df | 1597 | |
bb00b29d TG |
1598 | /* Always add a main thread. */ |
1599 | add_thread_silent (inferior_ptid); | |
a80b95ba | 1600 | |
bb00b29d | 1601 | darwin_attach_pid (inf); |
a80b95ba | 1602 | |
bb00b29d | 1603 | darwin_suspend_inferior (inf); |
a80b95ba | 1604 | |
bb00b29d | 1605 | darwin_init_thread_list (inf); |
a80b95ba | 1606 | |
bb00b29d | 1607 | darwin_check_osabi (inf->private, ptid_get_tid (inferior_ptid)); |
a80b95ba | 1608 | |
bb00b29d TG |
1609 | gdb_assert (darwin_inf_fake_stop == NULL); |
1610 | darwin_inf_fake_stop = inf; | |
1611 | inf->private->no_ptrace = 1; | |
a80b95ba TG |
1612 | } |
1613 | ||
1614 | /* Take a program previously attached to and detaches it. | |
1615 | The program resumes execution and will no longer stop | |
1616 | on signals, etc. We'd better not have left any breakpoints | |
1617 | in the program or it'll die when it hits one. For this | |
1618 | to work, it may be necessary for the process to have been | |
1619 | previously attached. It *might* work if the program was | |
1620 | started via fork. */ | |
1621 | static void | |
1622 | darwin_detach (struct target_ops *ops, char *args, int from_tty) | |
1623 | { | |
bb00b29d TG |
1624 | pid_t pid = ptid_get_pid (inferior_ptid); |
1625 | struct inferior *inf = current_inferior (); | |
a80b95ba TG |
1626 | kern_return_t kret; |
1627 | int res; | |
1628 | ||
bb00b29d | 1629 | /* Display message. */ |
a80b95ba TG |
1630 | if (from_tty) |
1631 | { | |
1632 | char *exec_file = get_exec_file (0); | |
1633 | if (exec_file == 0) | |
1634 | exec_file = ""; | |
bb00b29d TG |
1635 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
1636 | target_pid_to_str (pid_to_ptid (pid))); | |
a80b95ba TG |
1637 | gdb_flush (gdb_stdout); |
1638 | } | |
1639 | ||
bb00b29d TG |
1640 | /* If ptrace() is in use, stop the process. */ |
1641 | if (!inf->private->no_ptrace) | |
1642 | darwin_stop_inferior (inf); | |
a80b95ba | 1643 | |
bb00b29d | 1644 | kret = darwin_restore_exception_ports (inf->private); |
a80b95ba TG |
1645 | MACH_CHECK_ERROR (kret); |
1646 | ||
bb00b29d | 1647 | if (!inf->private->no_ptrace) |
a80b95ba | 1648 | { |
bb00b29d TG |
1649 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1650 | if (res != 0) | |
1651 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1652 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1653 | } |
1654 | ||
bb00b29d | 1655 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1656 | |
5e9bc145 JB |
1657 | /* When using ptrace, we have just performed a PT_DETACH, which |
1658 | resumes the inferior. On the other hand, when we are not using | |
1659 | ptrace, we need to resume its execution ourselves. */ | |
1660 | if (inf->private->no_ptrace) | |
1661 | darwin_resume_inferior (inf); | |
a80b95ba TG |
1662 | |
1663 | darwin_mourn_inferior (ops); | |
1664 | } | |
1665 | ||
1666 | static void | |
1667 | darwin_files_info (struct target_ops *ops) | |
1668 | { | |
a80b95ba TG |
1669 | } |
1670 | ||
1671 | static char * | |
117de6a9 | 1672 | darwin_pid_to_str (struct target_ops *ops, ptid_t ptid) |
a80b95ba | 1673 | { |
bb00b29d TG |
1674 | static char buf[80]; |
1675 | long tid = ptid_get_tid (ptid); | |
1676 | ||
1677 | if (tid != 0) | |
1678 | { | |
1679 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
1680 | tid, ptid_get_pid (ptid)); | |
1681 | return buf; | |
1682 | } | |
a80b95ba | 1683 | |
bb00b29d | 1684 | return normal_pid_to_str (ptid); |
a80b95ba TG |
1685 | } |
1686 | ||
1687 | static int | |
28439f5e | 1688 | darwin_thread_alive (struct target_ops *ops, ptid_t ptid) |
a80b95ba TG |
1689 | { |
1690 | return 1; | |
1691 | } | |
1692 | ||
1693 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
1694 | copy it to RDADDR in gdb's address space. | |
1695 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
1696 | to ADDR in inferior task's address space. | |
f00c55f8 | 1697 | Return 0 on failure; number of bytes read / writen otherwise. */ |
a80b95ba TG |
1698 | static int |
1699 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
1700 | char *rdaddr, const char *wraddr, int length) | |
1701 | { | |
bb00b29d | 1702 | kern_return_t kret; |
a80b95ba TG |
1703 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
1704 | mach_vm_address_t low_address = (mach_vm_address_t) (addr - offset); | |
1705 | mach_vm_size_t aligned_length = (mach_vm_size_t) PAGE_ROUND (offset + length); | |
1706 | pointer_t copied; | |
1707 | int copy_count; | |
1708 | mach_vm_size_t remaining_length; | |
1709 | mach_vm_address_t region_address; | |
1710 | mach_vm_size_t region_length; | |
1711 | ||
bb00b29d TG |
1712 | inferior_debug (8, _("darwin_read_write_inferior(task=%x, %s, len=%d)\n"), |
1713 | task, core_addr_to_string (addr), length); | |
1714 | ||
0963b4bd | 1715 | /* Get memory from inferior with page aligned addresses. */ |
bb00b29d | 1716 | kret = mach_vm_read (task, low_address, aligned_length, |
a80b95ba | 1717 | &copied, ©_count); |
bb00b29d | 1718 | if (kret != KERN_SUCCESS) |
a80b95ba | 1719 | { |
bb00b29d TG |
1720 | inferior_debug |
1721 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
1722 | core_addr_to_string (addr), mach_error_string (kret)); | |
a80b95ba TG |
1723 | return 0; |
1724 | } | |
1725 | ||
1726 | if (rdaddr != NULL) | |
1727 | memcpy (rdaddr, (char *)copied + offset, length); | |
1728 | ||
1729 | if (wraddr == NULL) | |
1730 | goto out; | |
1731 | ||
1732 | memcpy ((char *)copied + offset, wraddr, length); | |
1733 | ||
1734 | /* Do writes atomically. | |
1735 | First check for holes and unwritable memory. */ | |
1736 | for (region_address = low_address, remaining_length = aligned_length; | |
1737 | region_address < low_address + aligned_length; | |
1738 | region_address += region_length, remaining_length -= region_length) | |
1739 | { | |
bb00b29d TG |
1740 | vm_region_submap_short_info_data_64_t info; |
1741 | mach_vm_address_t region_start = region_address; | |
a80b95ba | 1742 | mach_msg_type_number_t count; |
bb00b29d TG |
1743 | natural_t region_depth; |
1744 | ||
1745 | region_depth = 100000; | |
1746 | count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; | |
1747 | kret = mach_vm_region_recurse | |
1748 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
1749 | (vm_region_recurse_info_t) &info, &count); | |
1750 | ||
1751 | if (kret != KERN_SUCCESS) | |
a80b95ba | 1752 | { |
bb00b29d TG |
1753 | inferior_debug (1, _("darwin_read_write_inferior: " |
1754 | "mach_vm_region_recurse failed at %s: %s\n"), | |
1755 | core_addr_to_string (region_address), | |
1756 | mach_error_string (kret)); | |
a80b95ba TG |
1757 | goto out; |
1758 | } | |
1759 | ||
bb00b29d TG |
1760 | inferior_debug |
1761 | (9, _("darwin_read_write_inferior: " | |
1762 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
1763 | core_addr_to_string (region_address), | |
1764 | core_addr_to_string (region_start), | |
1765 | core_addr_to_string (region_length)); | |
1766 | ||
0963b4bd | 1767 | /* Check for holes in memory. */ |
bb00b29d | 1768 | if (region_start > region_address) |
a80b95ba | 1769 | { |
0963b4bd | 1770 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 1771 | core_addr_to_string (region_address), |
bb00b29d | 1772 | core_addr_to_string (region_start), |
a80b95ba TG |
1773 | (unsigned)region_length); |
1774 | length = 0; | |
1775 | goto out; | |
1776 | } | |
1777 | ||
bb00b29d TG |
1778 | /* Adjust the length. */ |
1779 | region_length -= (region_address - region_start); | |
1780 | ||
a80b95ba TG |
1781 | if (!(info.max_protection & VM_PROT_WRITE)) |
1782 | { | |
bb00b29d TG |
1783 | kret = mach_vm_protect |
1784 | (task, region_address, region_length, | |
1785 | TRUE, info.max_protection | VM_PROT_WRITE | VM_PROT_COPY); | |
1786 | if (kret != KERN_SUCCESS) | |
1787 | { | |
1788 | warning (_("darwin_read_write_inf: " | |
1789 | "mach_vm_protect max failed at %s: %s"), | |
1790 | core_addr_to_string (region_address), | |
1791 | mach_error_string (kret)); | |
1792 | length = 0; | |
1793 | goto out; | |
1794 | } | |
a80b95ba TG |
1795 | } |
1796 | ||
1797 | if (!(info.protection & VM_PROT_WRITE)) | |
1798 | { | |
bb00b29d | 1799 | kret = mach_vm_protect (task, region_address, region_length, |
a80b95ba | 1800 | FALSE, info.protection | VM_PROT_WRITE); |
bb00b29d | 1801 | if (kret != KERN_SUCCESS) |
a80b95ba | 1802 | { |
bb00b29d TG |
1803 | warning (_("darwin_read_write_inf: " |
1804 | "mach_vm_protect failed at %s (len=0x%lx): %s"), | |
1805 | core_addr_to_string (region_address), | |
1806 | (unsigned long)region_length, mach_error_string (kret)); | |
a80b95ba TG |
1807 | length = 0; |
1808 | goto out; | |
1809 | } | |
1810 | } | |
1811 | } | |
1812 | ||
bb00b29d | 1813 | kret = mach_vm_write (task, low_address, copied, aligned_length); |
a80b95ba | 1814 | |
bb00b29d | 1815 | if (kret != KERN_SUCCESS) |
a80b95ba TG |
1816 | { |
1817 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
bb00b29d | 1818 | mach_error_string (kret)); |
a80b95ba TG |
1819 | length = 0; |
1820 | } | |
1821 | out: | |
1822 | mach_vm_deallocate (mach_task_self (), copied, copy_count); | |
1823 | return length; | |
1824 | } | |
1825 | ||
f00c55f8 TG |
1826 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
1827 | to RDADDR. | |
1828 | Return 0 on failure; number of bytes read / writen otherwise. */ | |
1829 | ||
1830 | static int | |
1831 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, char *rdaddr, int length) | |
1832 | { | |
1833 | struct task_dyld_info task_dyld_info; | |
1834 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
1835 | int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t); | |
1836 | kern_return_t kret; | |
1837 | ||
1838 | if (addr >= sz) | |
1839 | return 0; | |
1840 | ||
1841 | kret = task_info (task, TASK_DYLD_INFO, (task_info_t) &task_dyld_info, &count); | |
1842 | MACH_CHECK_ERROR (kret); | |
1843 | if (kret != KERN_SUCCESS) | |
1844 | return -1; | |
1845 | /* Truncate. */ | |
1846 | if (addr + length > sz) | |
1847 | length = sz - addr; | |
1848 | memcpy (rdaddr, (char *)&task_dyld_info + addr, length); | |
1849 | return length; | |
1850 | } | |
1851 | ||
a80b95ba TG |
1852 | \f |
1853 | /* Return 0 on failure, number of bytes handled otherwise. TARGET | |
0963b4bd | 1854 | is ignored. */ |
a80b95ba TG |
1855 | static int |
1856 | darwin_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, | |
1857 | struct mem_attrib *attrib, struct target_ops *target) | |
1858 | { | |
bb00b29d TG |
1859 | struct inferior *inf = current_inferior (); |
1860 | task_t task = inf->private->task; | |
a80b95ba TG |
1861 | |
1862 | if (task == MACH_PORT_NULL) | |
1863 | return 0; | |
1864 | ||
1865 | inferior_debug (8, _("darwin_xfer_memory(%s, %d, %c)\n"), | |
1866 | core_addr_to_string (memaddr), len, write ? 'w' : 'r'); | |
1867 | ||
1868 | if (write) | |
1869 | return darwin_read_write_inferior (task, memaddr, NULL, myaddr, len); | |
1870 | else | |
1871 | return darwin_read_write_inferior (task, memaddr, myaddr, NULL, len); | |
1872 | } | |
1873 | ||
1874 | static LONGEST | |
1875 | darwin_xfer_partial (struct target_ops *ops, | |
1876 | enum target_object object, const char *annex, | |
1877 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
1878 | ULONGEST offset, LONGEST len) | |
1879 | { | |
bb00b29d TG |
1880 | struct inferior *inf = current_inferior (); |
1881 | ||
1882 | inferior_debug | |
854f4b0e TG |
1883 | (8, _("darwin_xfer_partial(%s, %d, rbuf=%s, wbuf=%s) pid=%u\n"), |
1884 | core_addr_to_string (offset), (int)len, | |
1885 | host_address_to_string (readbuf), host_address_to_string (writebuf), | |
1886 | inf->pid); | |
a80b95ba | 1887 | |
f00c55f8 TG |
1888 | switch (object) |
1889 | { | |
1890 | case TARGET_OBJECT_MEMORY: | |
1891 | return darwin_read_write_inferior (inf->private->task, offset, | |
1892 | readbuf, writebuf, len); | |
1893 | case TARGET_OBJECT_DARWIN_DYLD_INFO: | |
1894 | if (writebuf != NULL || readbuf == NULL) | |
1895 | { | |
1896 | /* Support only read. */ | |
1897 | return -1; | |
1898 | } | |
1899 | return darwin_read_dyld_info (inf->private->task, offset, readbuf, len); | |
1900 | default: | |
1901 | return -1; | |
1902 | } | |
a80b95ba | 1903 | |
a80b95ba TG |
1904 | } |
1905 | ||
1906 | static void | |
1907 | set_enable_mach_exceptions (char *args, int from_tty, | |
1908 | struct cmd_list_element *c) | |
1909 | { | |
bb00b29d | 1910 | if (!ptid_equal (inferior_ptid, null_ptid)) |
a80b95ba | 1911 | { |
bb00b29d | 1912 | struct inferior *inf = current_inferior (); |
a80b95ba TG |
1913 | exception_mask_t mask; |
1914 | kern_return_t kret; | |
1915 | ||
1916 | if (enable_mach_exceptions) | |
1917 | mask = EXC_MASK_ALL; | |
1918 | else | |
1919 | { | |
bb00b29d TG |
1920 | darwin_restore_exception_ports (inf->private); |
1921 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
a80b95ba | 1922 | } |
bb00b29d | 1923 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, |
a80b95ba TG |
1924 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
1925 | MACH_CHECK_ERROR (kret); | |
1926 | } | |
1927 | } | |
1928 | ||
bb00b29d TG |
1929 | static char * |
1930 | darwin_pid_to_exec_file (int pid) | |
1931 | { | |
1932 | char *path; | |
1933 | int res; | |
1934 | ||
1935 | path = xmalloc (MAXPATHLEN); | |
1936 | make_cleanup (xfree, path); | |
1937 | ||
1938 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, MAXPATHLEN); | |
1939 | if (res >= 0) | |
1940 | return path; | |
1941 | else | |
1942 | return NULL; | |
1943 | } | |
1944 | ||
1945 | static ptid_t | |
1946 | darwin_get_ada_task_ptid (long lwp, long thread) | |
1947 | { | |
1948 | int i; | |
1949 | darwin_thread_t *t; | |
1950 | int k; | |
1951 | struct inferior *inf = current_inferior (); | |
1952 | kern_return_t kret; | |
1953 | mach_port_name_array_t names; | |
1954 | mach_msg_type_number_t names_count; | |
1955 | mach_port_type_array_t types; | |
1956 | mach_msg_type_number_t types_count; | |
1957 | long res = 0; | |
1958 | ||
1959 | /* First linear search. */ | |
1960 | for (k = 0; | |
1961 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1962 | k++) | |
1963 | if (t->inf_port == lwp) | |
1964 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); | |
1965 | ||
1966 | /* Maybe the port was never extract. Do it now. */ | |
1967 | ||
1968 | /* First get inferior port names. */ | |
1969 | kret = mach_port_names (inf->private->task, &names, &names_count, &types, | |
1970 | &types_count); | |
1971 | MACH_CHECK_ERROR (kret); | |
1972 | if (kret != KERN_SUCCESS) | |
1973 | return null_ptid; | |
1974 | ||
1975 | /* For each name, copy the right in the gdb space and then compare with | |
1976 | our view of the inferior threads. We don't forget to deallocate the | |
1977 | right. */ | |
1978 | for (i = 0; i < names_count; i++) | |
1979 | { | |
1980 | mach_port_t local_name; | |
1981 | mach_msg_type_name_t local_type; | |
1982 | ||
1983 | /* We just need to know the corresponding name in gdb name space. | |
1984 | So extract and deallocate the right. */ | |
1985 | kret = mach_port_extract_right (inf->private->task, names[i], | |
1986 | MACH_MSG_TYPE_COPY_SEND, | |
1987 | &local_name, &local_type); | |
1988 | if (kret != KERN_SUCCESS) | |
1989 | continue; | |
1990 | mach_port_deallocate (gdb_task, local_name); | |
1991 | ||
1992 | for (k = 0; | |
1993 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1994 | k++) | |
1995 | if (t->gdb_port == local_name) | |
1996 | { | |
1997 | t->inf_port = names[i]; | |
1998 | if (names[i] == lwp) | |
1999 | res = t->gdb_port; | |
2000 | } | |
2001 | } | |
2002 | ||
2003 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2004 | names_count * sizeof (mach_port_t)); | |
2005 | ||
2006 | if (res) | |
2007 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); | |
2008 | else | |
2009 | return null_ptid; | |
2010 | } | |
2011 | ||
2012 | static int | |
2013 | darwin_supports_multi_process (void) | |
2014 | { | |
2015 | return 1; | |
2016 | } | |
2017 | ||
a80b95ba | 2018 | void |
bb00b29d | 2019 | _initialize_darwin_inferior (void) |
a80b95ba TG |
2020 | { |
2021 | kern_return_t kret; | |
2022 | ||
a80b95ba TG |
2023 | gdb_task = mach_task_self (); |
2024 | darwin_host_self = mach_host_self (); | |
2025 | ||
2026 | /* Read page size. */ | |
2027 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2028 | if (kret != KERN_SUCCESS) | |
2029 | { | |
2030 | mach_page_size = 0x1000; | |
2031 | MACH_CHECK_ERROR (kret); | |
2032 | } | |
2033 | ||
a80b95ba TG |
2034 | darwin_ops = inf_child_target (); |
2035 | ||
2036 | darwin_ops->to_shortname = "darwin-child"; | |
2037 | darwin_ops->to_longname = _("Darwin child process"); | |
2038 | darwin_ops->to_doc = | |
2039 | _("Darwin child process (started by the \"run\" command)."); | |
2040 | darwin_ops->to_create_inferior = darwin_create_inferior; | |
2041 | darwin_ops->to_attach = darwin_attach; | |
2042 | darwin_ops->to_attach_no_wait = 0; | |
2043 | darwin_ops->to_detach = darwin_detach; | |
2044 | darwin_ops->to_files_info = darwin_files_info; | |
bb00b29d | 2045 | darwin_ops->to_wait = darwin_wait_to; |
a80b95ba TG |
2046 | darwin_ops->to_mourn_inferior = darwin_mourn_inferior; |
2047 | darwin_ops->to_kill = darwin_kill_inferior; | |
2048 | darwin_ops->to_stop = darwin_stop; | |
bb00b29d | 2049 | darwin_ops->to_resume = darwin_resume_to; |
a80b95ba TG |
2050 | darwin_ops->to_thread_alive = darwin_thread_alive; |
2051 | darwin_ops->to_pid_to_str = darwin_pid_to_str; | |
bb00b29d | 2052 | darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file; |
a80b95ba TG |
2053 | darwin_ops->to_load = NULL; |
2054 | darwin_ops->deprecated_xfer_memory = darwin_xfer_memory; | |
2055 | darwin_ops->to_xfer_partial = darwin_xfer_partial; | |
bb00b29d TG |
2056 | darwin_ops->to_supports_multi_process = darwin_supports_multi_process; |
2057 | darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid; | |
a80b95ba TG |
2058 | |
2059 | darwin_complete_target (darwin_ops); | |
2060 | ||
2061 | add_target (darwin_ops); | |
2062 | ||
2063 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), mach_task_self (), | |
2064 | getpid ()); | |
2065 | ||
2066 | add_setshow_zinteger_cmd ("darwin", class_obscure, | |
2067 | &darwin_debug_flag, _("\ | |
2068 | Set if printing inferior communication debugging statements."), _("\ | |
2069 | Show if printing inferior communication debugging statements."), NULL, | |
2070 | NULL, NULL, | |
2071 | &setdebuglist, &showdebuglist); | |
2072 | ||
2073 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2074 | &enable_mach_exceptions, _("\ | |
2075 | Set if mach exceptions are caught."), _("\ | |
2076 | Show if mach exceptions are caught."), _("\ | |
2077 | When this mode is on, all low level exceptions are reported before being\n\ | |
2078 | reported by the kernel."), | |
2079 | &set_enable_mach_exceptions, NULL, | |
2080 | &setlist, &showlist); | |
2081 | } |