Commit | Line | Data |
---|---|---|
a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
ecd75fc8 | 2 | Copyright (C) 2008-2014 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 | |
47d48711 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
a80b95ba TG |
20 | |
21 | #include "defs.h" | |
22 | #include "top.h" | |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "symfile.h" | |
26 | #include "symtab.h" | |
27 | #include "objfiles.h" | |
28 | #include "gdb.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "gdbcore.h" | |
31 | #include "gdbthread.h" | |
32 | #include "regcache.h" | |
33 | #include "event-top.h" | |
34 | #include "inf-loop.h" | |
53ce3c39 | 35 | #include <sys/stat.h> |
a80b95ba TG |
36 | #include "exceptions.h" |
37 | #include "inf-child.h" | |
38 | #include "value.h" | |
39 | #include "arch-utils.h" | |
40 | #include "bfd.h" | |
ece0061f | 41 | #include "bfd/mach-o.h" |
a80b95ba TG |
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> | |
a80b95ba TG |
51 | #include <sys/sysctl.h> |
52 | #include <sys/proc.h> | |
bb00b29d TG |
53 | #include <libproc.h> |
54 | #include <sys/syscall.h> | |
e69860f1 | 55 | #include <spawn.h> |
a80b95ba TG |
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" | |
21ff4686 | 67 | #include "common/filestuff.h" |
a80b95ba TG |
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 | ||
1eab8a48 | 88 | static void darwin_stop (struct target_ops *self, ptid_t); |
a80b95ba | 89 | |
bb00b29d | 90 | static void darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, |
2ea28649 | 91 | enum gdb_signal signal); |
bb00b29d | 92 | static void darwin_resume (ptid_t ptid, int step, |
2ea28649 | 93 | enum gdb_signal signal); |
bb00b29d TG |
94 | |
95 | static ptid_t darwin_wait_to (struct target_ops *ops, ptid_t ptid, | |
96 | struct target_waitstatus *status, int options); | |
97 | static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status); | |
98 | ||
a80b95ba TG |
99 | static void darwin_mourn_inferior (struct target_ops *ops); |
100 | ||
2ab1c2d9 | 101 | static void darwin_kill_inferior (struct target_ops *ops); |
a80b95ba TG |
102 | |
103 | static void darwin_ptrace_me (void); | |
104 | ||
105 | static void darwin_ptrace_him (int pid); | |
106 | ||
107 | static void darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
108 | char *allargs, char **env, int from_tty); | |
109 | ||
110 | static void darwin_files_info (struct target_ops *ops); | |
111 | ||
bb00b29d TG |
112 | static char *darwin_pid_to_str (struct target_ops *ops, ptid_t tpid); |
113 | ||
114 | static int darwin_thread_alive (struct target_ops *ops, ptid_t tpid); | |
a80b95ba | 115 | |
a41f2563 TG |
116 | static void darwin_encode_reply (mig_reply_error_t *reply, |
117 | mach_msg_header_t *hdr, integer_t code); | |
118 | ||
a80b95ba TG |
119 | /* Target operations for Darwin. */ |
120 | static struct target_ops *darwin_ops; | |
121 | ||
122 | /* Task identifier of gdb. */ | |
123 | static task_t gdb_task; | |
124 | ||
125 | /* A copy of mach_host_self (). */ | |
126 | mach_port_t darwin_host_self; | |
127 | ||
128 | /* Exception port. */ | |
129 | mach_port_t darwin_ex_port; | |
130 | ||
a6290449 | 131 | /* Port set, to wait for answer on all ports. */ |
a80b95ba TG |
132 | mach_port_t darwin_port_set; |
133 | ||
0963b4bd | 134 | /* Page size. */ |
a80b95ba TG |
135 | static vm_size_t mach_page_size; |
136 | ||
137 | /* If Set, catch all mach exceptions (before they are converted to signals | |
138 | by the kernel). */ | |
139 | static int enable_mach_exceptions; | |
140 | ||
bb00b29d TG |
141 | /* Inferior that should report a fake stop event. */ |
142 | static struct inferior *darwin_inf_fake_stop; | |
143 | ||
a80b95ba TG |
144 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
145 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
146 | ||
bb00b29d | 147 | /* This controls output of inferior debugging. */ |
ccce17b0 | 148 | static unsigned int darwin_debug_flag = 0; |
a80b95ba | 149 | |
15c19d39 TG |
150 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
151 | be signed. This is required to get an authorization for task_for_pid. | |
152 | ||
a6290449 TG |
153 | Once gdb is built, you must codesign it with any system-trusted signing |
154 | authority. See taskgated(8) for details. */ | |
15c19d39 TG |
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 | ||
a80b95ba TG |
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]"); | |
bb00b29d | 198 | |
4f1cdeec | 199 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 200 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
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 | ||
a7aa0d73 JB |
236 | /* Set errno to zero, and then call ptrace with the given arguments. |
237 | If inferior debugging traces are on, then also print a debug | |
238 | trace. | |
239 | ||
240 | The returned value is the same as the value returned by ptrace, | |
241 | except in the case where that value is -1 but errno is zero. | |
242 | This case is documented to be a non-error situation, so we | |
243 | return zero in that case. */ | |
244 | ||
a80b95ba TG |
245 | static int |
246 | darwin_ptrace (const char *name, | |
247 | int request, int pid, PTRACE_TYPE_ARG3 arg3, int arg4) | |
248 | { | |
249 | int ret; | |
250 | ||
a7aa0d73 | 251 | errno = 0; |
a80b95ba | 252 | ret = ptrace (request, pid, (caddr_t) arg3, arg4); |
a7aa0d73 JB |
253 | if (ret == -1 && errno == 0) |
254 | ret = 0; | |
a80b95ba | 255 | |
bb00b29d | 256 | inferior_debug (4, _("ptrace (%s, %d, 0x%x, %d): %d (%s)\n"), |
a80b95ba | 257 | name, pid, arg3, arg4, ret, |
a3224241 | 258 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
259 | return ret; |
260 | } | |
261 | ||
262 | static int | |
263 | cmp_thread_t (const void *l, const void *r) | |
264 | { | |
bb00b29d TG |
265 | thread_t tl = *(const thread_t *)l; |
266 | thread_t tr = *(const thread_t *)r; | |
267 | return (int)(tl - tr); | |
a80b95ba TG |
268 | } |
269 | ||
270 | static void | |
bb00b29d | 271 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
272 | { |
273 | kern_return_t kret; | |
274 | unsigned int i; | |
275 | thread_array_t thread_list; | |
276 | unsigned int new_nbr; | |
277 | unsigned int old_nbr; | |
278 | unsigned int new_ix, old_ix; | |
bb00b29d TG |
279 | darwin_inferior *darwin_inf = inf->private; |
280 | VEC (darwin_thread_t) *thread_vec; | |
a80b95ba TG |
281 | |
282 | /* Get list of threads. */ | |
bb00b29d | 283 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
284 | MACH_CHECK_ERROR (kret); |
285 | if (kret != KERN_SUCCESS) | |
286 | return; | |
287 | ||
bb00b29d | 288 | /* Sort the list. */ |
a80b95ba TG |
289 | if (new_nbr > 1) |
290 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
291 | ||
bb00b29d TG |
292 | if (darwin_inf->threads) |
293 | old_nbr = VEC_length (darwin_thread_t, darwin_inf->threads); | |
a80b95ba TG |
294 | else |
295 | old_nbr = 0; | |
296 | ||
bb00b29d TG |
297 | /* Quick check for no changes. */ |
298 | if (old_nbr == new_nbr) | |
299 | { | |
300 | for (i = 0; i < new_nbr; i++) | |
301 | if (thread_list[i] | |
302 | != VEC_index (darwin_thread_t, darwin_inf->threads, i)->gdb_port) | |
303 | break; | |
304 | if (i == new_nbr) | |
305 | { | |
306 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, | |
307 | new_nbr * sizeof (int)); | |
308 | MACH_CHECK_ERROR (kret); | |
309 | return; | |
310 | } | |
311 | } | |
312 | ||
313 | thread_vec = VEC_alloc (darwin_thread_t, new_nbr); | |
314 | ||
a80b95ba TG |
315 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
316 | { | |
317 | thread_t new_id = (new_ix < new_nbr) ? | |
318 | thread_list[new_ix] : THREAD_NULL; | |
bb00b29d TG |
319 | darwin_thread_t *old = (old_ix < old_nbr) ? |
320 | VEC_index (darwin_thread_t, darwin_inf->threads, old_ix) : NULL; | |
321 | thread_t old_id = old ? old->gdb_port : THREAD_NULL; | |
322 | ||
323 | inferior_debug | |
c8c9911f | 324 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"), |
bb00b29d | 325 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
a80b95ba TG |
326 | |
327 | if (old_id == new_id) | |
328 | { | |
329 | /* Thread still exist. */ | |
bb00b29d | 330 | VEC_safe_push (darwin_thread_t, thread_vec, old); |
a80b95ba TG |
331 | new_ix++; |
332 | old_ix++; | |
333 | ||
334 | kret = mach_port_deallocate (gdb_task, old_id); | |
335 | MACH_CHECK_ERROR (kret); | |
336 | continue; | |
337 | } | |
bb00b29d TG |
338 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
339 | { | |
340 | /* Ignore dead ports. | |
341 | In some weird cases, we might get dead ports. They should | |
342 | correspond to dead thread so they could safely be ignored. */ | |
343 | new_ix++; | |
344 | continue; | |
345 | } | |
346 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
347 | { |
348 | /* A thread was created. */ | |
349 | struct thread_info *tp; | |
bb00b29d | 350 | struct private_thread_info *pti; |
a80b95ba | 351 | |
41bf6aca | 352 | pti = XCNEW (struct private_thread_info); |
bb00b29d TG |
353 | pti->gdb_port = new_id; |
354 | pti->msg_state = DARWIN_RUNNING; | |
355 | ||
356 | /* Add a new thread unless this is the first one ever met. */ | |
357 | if (!(old_nbr == 0 && new_ix == 0)) | |
358 | tp = add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti); | |
359 | else | |
360 | { | |
361 | tp = find_thread_ptid (ptid_build (inf->pid, 0, 0)); | |
362 | gdb_assert (tp); | |
363 | tp->private = pti; | |
364 | } | |
365 | VEC_safe_push (darwin_thread_t, thread_vec, pti); | |
a80b95ba TG |
366 | new_ix++; |
367 | continue; | |
368 | } | |
bb00b29d | 369 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
370 | { |
371 | /* A thread was removed. */ | |
372 | delete_thread (ptid_build (inf->pid, 0, old_id)); | |
373 | kret = mach_port_deallocate (gdb_task, old_id); | |
374 | MACH_CHECK_ERROR (kret); | |
375 | old_ix++; | |
bb00b29d | 376 | continue; |
a80b95ba | 377 | } |
f3574227 | 378 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
379 | } |
380 | ||
bb00b29d TG |
381 | if (darwin_inf->threads) |
382 | VEC_free (darwin_thread_t, darwin_inf->threads); | |
383 | darwin_inf->threads = thread_vec; | |
a80b95ba TG |
384 | |
385 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, | |
386 | new_nbr * sizeof (int)); | |
387 | MACH_CHECK_ERROR (kret); | |
388 | } | |
389 | ||
bb00b29d TG |
390 | static int |
391 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 392 | { |
bb00b29d TG |
393 | return inf->private->task == *(task_t*)port_ptr; |
394 | } | |
a80b95ba | 395 | |
bb00b29d TG |
396 | static int |
397 | find_inferior_notify_it (struct inferior *inf, void *port_ptr) | |
398 | { | |
399 | return inf->private->notify_port == *(task_t*)port_ptr; | |
a80b95ba TG |
400 | } |
401 | ||
bb00b29d TG |
402 | /* Return an inferior by task port. */ |
403 | static struct inferior * | |
404 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 405 | { |
bb00b29d TG |
406 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
407 | } | |
a80b95ba | 408 | |
bb00b29d TG |
409 | /* Return an inferior by notification port. */ |
410 | static struct inferior * | |
411 | darwin_find_inferior_by_notify (mach_port_t port) | |
412 | { | |
413 | return iterate_over_inferiors (&find_inferior_notify_it, &port); | |
414 | } | |
a80b95ba | 415 | |
bb00b29d TG |
416 | /* Return a thread by port. */ |
417 | static darwin_thread_t * | |
418 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
419 | { | |
420 | darwin_thread_t *t; | |
421 | int k; | |
422 | ||
423 | for (k = 0; | |
424 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
425 | k++) | |
426 | if (t->gdb_port == thread) | |
427 | return t; | |
428 | return NULL; | |
429 | } | |
a80b95ba | 430 | |
bb00b29d | 431 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 432 | |
bb00b29d TG |
433 | static void |
434 | darwin_suspend_inferior (struct inferior *inf) | |
435 | { | |
436 | if (!inf->private->suspended) | |
a80b95ba | 437 | { |
bb00b29d | 438 | kern_return_t kret; |
a80b95ba | 439 | |
bb00b29d TG |
440 | kret = task_suspend (inf->private->task); |
441 | MACH_CHECK_ERROR (kret); | |
a80b95ba | 442 | |
bb00b29d TG |
443 | inf->private->suspended = 1; |
444 | } | |
445 | } | |
a80b95ba | 446 | |
bb00b29d | 447 | /* Resume an inferior at Mach level. */ |
a80b95ba | 448 | |
bb00b29d TG |
449 | static void |
450 | darwin_resume_inferior (struct inferior *inf) | |
451 | { | |
452 | if (inf->private->suspended) | |
453 | { | |
454 | kern_return_t kret; | |
a80b95ba | 455 | |
bb00b29d TG |
456 | kret = task_resume (inf->private->task); |
457 | MACH_CHECK_ERROR (kret); | |
458 | ||
459 | inf->private->suspended = 0; | |
a80b95ba TG |
460 | } |
461 | } | |
462 | ||
bb00b29d TG |
463 | /* Iterator functions. */ |
464 | ||
465 | static int | |
466 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 467 | { |
bb00b29d TG |
468 | darwin_suspend_inferior (inf); |
469 | darwin_check_new_threads (inf); | |
470 | return 0; | |
471 | } | |
472 | ||
473 | static int | |
474 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
475 | { | |
476 | darwin_resume_inferior (inf); | |
477 | return 0; | |
a80b95ba TG |
478 | } |
479 | ||
bb00b29d TG |
480 | static void |
481 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
482 | { | |
483 | printf_unfiltered (_("message header:\n")); | |
484 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
485 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
486 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
487 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
488 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
489 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
490 | ||
491 | if (disp_body) | |
492 | { | |
493 | const unsigned char *data; | |
a6290449 | 494 | const unsigned int *ldata; |
bb00b29d TG |
495 | int size; |
496 | int i; | |
497 | ||
498 | data = (unsigned char *)(hdr + 1); | |
499 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
500 | ||
501 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
502 | { | |
503 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
504 | mach_msg_port_descriptor_t *desc = | |
505 | (mach_msg_port_descriptor_t *)(bod + 1); | |
506 | int k; | |
507 | NDR_record_t *ndr; | |
508 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
509 | bod->msgh_descriptor_count); | |
510 | data += sizeof (mach_msg_body_t); | |
511 | size -= sizeof (mach_msg_body_t); | |
512 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
513 | switch (desc[k].type) | |
514 | { | |
515 | case MACH_MSG_PORT_DESCRIPTOR: | |
516 | printf_unfiltered | |
517 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
518 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
519 | break; | |
520 | default: | |
521 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
522 | k, desc[k].type); | |
523 | break; | |
524 | } | |
525 | data += bod->msgh_descriptor_count | |
526 | * sizeof (mach_msg_port_descriptor_t); | |
527 | size -= bod->msgh_descriptor_count | |
528 | * sizeof (mach_msg_port_descriptor_t); | |
529 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
530 | printf_unfiltered | |
531 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
532 | "int=%02x char=%02x float=%02x\n"), | |
533 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
534 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
535 | data += sizeof (NDR_record_t); | |
536 | size -= sizeof (NDR_record_t); | |
537 | } | |
538 | ||
539 | printf_unfiltered (_(" data:")); | |
a6290449 TG |
540 | ldata = (const unsigned int *)data; |
541 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
542 | printf_unfiltered (" %08x", ldata[i]); | |
bb00b29d TG |
543 | printf_unfiltered (_("\n")); |
544 | } | |
545 | } | |
546 | ||
547 | static int | |
548 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
549 | struct inferior **pinf, | |
550 | darwin_thread_t **pthread) | |
a80b95ba | 551 | { |
bb00b29d TG |
552 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
553 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
554 | NDR_record_t *ndr; | |
555 | integer_t *data; | |
556 | struct inferior *inf; | |
557 | darwin_thread_t *thread; | |
558 | task_t task_port; | |
559 | thread_t thread_port; | |
a80b95ba | 560 | kern_return_t kret; |
bb00b29d | 561 | int i; |
a80b95ba | 562 | |
a41f2563 TG |
563 | /* Check message destination. */ |
564 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
565 | return -1; |
566 | ||
567 | /* Check message header. */ | |
568 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
569 | return -1; | |
570 | ||
571 | /* Check descriptors. */ | |
572 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
573 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
574 | || bod->msgh_descriptor_count != 2 | |
575 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
576 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
577 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
578 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
579 | return -1; | |
580 | ||
581 | /* Check data representation. */ | |
582 | ndr = (NDR_record_t *)(desc + 2); | |
583 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
584 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
585 | || ndr->mig_encoding != NDR_record.mig_encoding | |
586 | || ndr->int_rep != NDR_record.int_rep | |
587 | || ndr->char_rep != NDR_record.char_rep | |
588 | || ndr->float_rep != NDR_record.float_rep) | |
589 | return -1; | |
590 | ||
591 | /* Ok, the hard work. */ | |
592 | data = (integer_t *)(ndr + 1); | |
593 | ||
bb00b29d TG |
594 | task_port = desc[1].name; |
595 | thread_port = desc[0].name; | |
a41f2563 TG |
596 | |
597 | /* We got new rights to the task and the thread. Get rid of them. */ | |
598 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
599 | MACH_CHECK_ERROR (kret); | |
600 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
601 | MACH_CHECK_ERROR (kret); | |
602 | ||
603 | /* Find process by port. */ | |
bb00b29d | 604 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 605 | *pinf = inf; |
a41f2563 TG |
606 | if (inf == NULL) |
607 | { | |
608 | /* Not a known inferior. This could happen if the child fork, as | |
609 | the created process will inherit its exception port. | |
610 | FIXME: should the exception port be restored ? */ | |
611 | kern_return_t kret; | |
612 | mig_reply_error_t reply; | |
613 | ||
614 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); | |
615 | ||
616 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
617 | reply.Head.msgh_size, 0, | |
618 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
619 | MACH_PORT_NULL); | |
620 | MACH_CHECK_ERROR (kret); | |
621 | ||
622 | return 0; | |
623 | } | |
bb00b29d TG |
624 | |
625 | /* Find thread by port. */ | |
626 | /* Check for new threads. Do it early so that the port in the exception | |
627 | message can be deallocated. */ | |
628 | darwin_check_new_threads (inf); | |
629 | ||
bb00b29d TG |
630 | thread = darwin_find_thread (inf, thread_port); |
631 | if (thread == NULL) | |
632 | return -1; | |
633 | *pthread = thread; | |
634 | ||
a6290449 TG |
635 | /* The thread should be running. However we have observed cases where a |
636 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
637 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
638 | ||
bb00b29d | 639 | /* Finish decoding. */ |
bb00b29d TG |
640 | thread->event.header = *hdr; |
641 | thread->event.thread_port = thread_port; | |
642 | thread->event.task_port = task_port; | |
643 | thread->event.ex_type = data[0]; | |
644 | thread->event.data_count = data[1]; | |
645 | ||
646 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
647 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
648 | + data[1] * sizeof (integer_t))) | |
649 | return -1; | |
650 | for (i = 0; i < data[1]; i++) | |
651 | thread->event.ex_data[i] = data[2 + i]; | |
652 | ||
653 | thread->msg_state = DARWIN_MESSAGE; | |
654 | ||
655 | return 0; | |
656 | } | |
657 | ||
658 | static void | |
659 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
660 | integer_t code) | |
661 | { | |
662 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
663 | |
664 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 665 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 666 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
667 | rh->msgh_local_port = MACH_PORT_NULL; |
668 | rh->msgh_id = hdr->msgh_id + 100; | |
669 | ||
670 | reply->NDR = NDR_record; | |
671 | reply->RetCode = code; | |
a80b95ba TG |
672 | } |
673 | ||
bb00b29d TG |
674 | static void |
675 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
676 | { |
677 | kern_return_t kret; | |
bb00b29d | 678 | mig_reply_error_t reply; |
a80b95ba | 679 | |
bb00b29d TG |
680 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
681 | ||
682 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
683 | reply.Head.msgh_size, 0, | |
684 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
685 | MACH_PORT_NULL); | |
a80b95ba TG |
686 | MACH_CHECK_ERROR (kret); |
687 | ||
bb00b29d TG |
688 | inf->private->pending_messages--; |
689 | } | |
690 | ||
691 | static void | |
692 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
693 | int step, int nsignal) | |
694 | { | |
695 | kern_return_t kret; | |
696 | int res; | |
697 | ||
a80b95ba | 698 | inferior_debug |
bb00b29d TG |
699 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
700 | thread->msg_state, thread->gdb_port, step, nsignal); | |
701 | ||
702 | switch (thread->msg_state) | |
a80b95ba | 703 | { |
bb00b29d TG |
704 | case DARWIN_MESSAGE: |
705 | if (thread->event.ex_type == EXC_SOFTWARE | |
706 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
707 | { | |
708 | /* Either deliver a new signal or cancel the signal received. */ | |
709 | res = PTRACE (PT_THUPDATE, inf->pid, | |
710 | (void *)(uintptr_t)thread->gdb_port, nsignal); | |
711 | if (res < 0) | |
712 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
713 | } | |
714 | else if (nsignal) | |
715 | { | |
716 | /* Note: ptrace is allowed only if the process is stopped. | |
717 | Directly send the signal to the thread. */ | |
718 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
719 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), | |
720 | thread->gdb_port, nsignal, res); | |
721 | thread->signaled = 1; | |
722 | } | |
723 | ||
d987a266 TG |
724 | /* Set or reset single step. */ |
725 | if (step != thread->single_step) | |
726 | { | |
c8c9911f | 727 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
d987a266 TG |
728 | thread->gdb_port, step); |
729 | darwin_set_sstep (thread->gdb_port, step); | |
730 | thread->single_step = step; | |
731 | } | |
bb00b29d TG |
732 | |
733 | darwin_send_reply (inf, thread); | |
734 | thread->msg_state = DARWIN_RUNNING; | |
735 | break; | |
736 | ||
737 | case DARWIN_RUNNING: | |
738 | break; | |
739 | ||
740 | case DARWIN_STOPPED: | |
741 | kret = thread_resume (thread->gdb_port); | |
742 | MACH_CHECK_ERROR (kret); | |
743 | ||
744 | thread->msg_state = DARWIN_RUNNING; | |
745 | break; | |
a80b95ba | 746 | } |
bb00b29d | 747 | } |
a80b95ba | 748 | |
bb00b29d | 749 | /* Resume all threads of the inferior. */ |
a80b95ba | 750 | |
bb00b29d TG |
751 | static void |
752 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
753 | { | |
754 | darwin_thread_t *thread; | |
755 | int k; | |
756 | ||
757 | for (k = 0; | |
758 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); | |
759 | k++) | |
760 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
761 | } |
762 | ||
bb00b29d | 763 | struct resume_inferior_threads_param |
a80b95ba | 764 | { |
bb00b29d TG |
765 | int step; |
766 | int nsignal; | |
767 | }; | |
768 | ||
769 | static int | |
770 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
771 | { | |
772 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
773 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
774 | ||
775 | darwin_resume_inferior_threads (inf, step, nsignal); | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
780 | /* Suspend all threads of INF. */ | |
781 | ||
782 | static void | |
783 | darwin_suspend_inferior_threads (struct inferior *inf) | |
784 | { | |
785 | darwin_thread_t *thread; | |
a80b95ba | 786 | kern_return_t kret; |
bb00b29d TG |
787 | int k; |
788 | ||
789 | for (k = 0; | |
790 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); | |
791 | k++) | |
792 | switch (thread->msg_state) | |
793 | { | |
794 | case DARWIN_STOPPED: | |
795 | case DARWIN_MESSAGE: | |
796 | break; | |
797 | case DARWIN_RUNNING: | |
798 | kret = thread_suspend (thread->gdb_port); | |
799 | MACH_CHECK_ERROR (kret); | |
800 | thread->msg_state = DARWIN_STOPPED; | |
801 | break; | |
802 | } | |
803 | } | |
a80b95ba | 804 | |
bb00b29d | 805 | static void |
2ea28649 | 806 | darwin_resume (ptid_t ptid, int step, enum gdb_signal signal) |
bb00b29d TG |
807 | { |
808 | struct target_waitstatus status; | |
809 | int pid; | |
a80b95ba | 810 | |
bb00b29d TG |
811 | kern_return_t kret; |
812 | int res; | |
813 | int nsignal; | |
814 | struct inferior *inf; | |
a80b95ba | 815 | |
bb00b29d TG |
816 | inferior_debug |
817 | (2, _("darwin_resume: pid=%d, tid=0x%x, step=%d, signal=%d\n"), | |
818 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); | |
819 | ||
a493e3e2 | 820 | if (signal == GDB_SIGNAL_0) |
bb00b29d TG |
821 | nsignal = 0; |
822 | else | |
2ea28649 | 823 | nsignal = gdb_signal_to_host (signal); |
a80b95ba | 824 | |
bb00b29d TG |
825 | /* Don't try to single step all threads. */ |
826 | if (step) | |
827 | ptid = inferior_ptid; | |
828 | ||
829 | /* minus_one_ptid is RESUME_ALL. */ | |
830 | if (ptid_equal (ptid, minus_one_ptid)) | |
a80b95ba | 831 | { |
bb00b29d TG |
832 | struct resume_inferior_threads_param param; |
833 | ||
834 | param.nsignal = nsignal; | |
835 | param.step = step; | |
a80b95ba | 836 | |
bb00b29d TG |
837 | /* Resume threads. */ |
838 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
839 | /* Resume tasks. */ | |
840 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
841 | } | |
842 | else | |
a80b95ba | 843 | { |
bb00b29d TG |
844 | struct inferior *inf = find_inferior_pid (ptid_get_pid (ptid)); |
845 | long tid = ptid_get_tid (ptid); | |
846 | ||
847 | /* Stop the inferior (should be useless). */ | |
848 | darwin_suspend_inferior (inf); | |
849 | ||
850 | if (tid == 0) | |
851 | darwin_resume_inferior_threads (inf, step, nsignal); | |
852 | else | |
853 | { | |
854 | darwin_thread_t *thread; | |
855 | ||
856 | /* Suspend threads of the task. */ | |
857 | darwin_suspend_inferior_threads (inf); | |
858 | ||
859 | /* Resume the selected thread. */ | |
860 | thread = darwin_find_thread (inf, tid); | |
861 | gdb_assert (thread); | |
862 | darwin_resume_thread (inf, thread, step, nsignal); | |
863 | } | |
864 | ||
865 | /* Resume the task. */ | |
866 | darwin_resume_inferior (inf); | |
a80b95ba | 867 | } |
bb00b29d | 868 | } |
a80b95ba | 869 | |
bb00b29d TG |
870 | static void |
871 | darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 872 | enum gdb_signal signal) |
bb00b29d TG |
873 | { |
874 | return darwin_resume (ptid, step, signal); | |
875 | } | |
876 | ||
877 | static ptid_t | |
878 | darwin_decode_message (mach_msg_header_t *hdr, | |
879 | darwin_thread_t **pthread, | |
880 | struct inferior **pinf, | |
881 | struct target_waitstatus *status) | |
882 | { | |
883 | darwin_thread_t *thread; | |
884 | struct inferior *inf; | |
a80b95ba | 885 | |
a41f2563 TG |
886 | /* Exception message. 2401 == 0x961 is exc. */ |
887 | if (hdr->msgh_id == 2401) | |
a80b95ba | 888 | { |
bb00b29d TG |
889 | int res; |
890 | ||
891 | /* Decode message. */ | |
892 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
893 | ||
894 | if (res < 0) | |
a80b95ba | 895 | { |
bb00b29d | 896 | /* Should not happen... */ |
c8c9911f JB |
897 | printf_unfiltered |
898 | (_("darwin_wait: ill-formatted message (id=0x%x)\n"), hdr->msgh_id); | |
bb00b29d | 899 | /* FIXME: send a failure reply? */ |
a41f2563 TG |
900 | status->kind = TARGET_WAITKIND_IGNORE; |
901 | return minus_one_ptid; | |
902 | } | |
903 | if (inf == NULL) | |
904 | { | |
905 | status->kind = TARGET_WAITKIND_IGNORE; | |
a80b95ba TG |
906 | return minus_one_ptid; |
907 | } | |
bb00b29d TG |
908 | *pinf = inf; |
909 | *pthread = thread; | |
910 | inf->private->pending_messages++; | |
a80b95ba TG |
911 | |
912 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
913 | thread->msg_state = DARWIN_MESSAGE; |
914 | ||
c8c9911f | 915 | inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"), |
bb00b29d TG |
916 | thread->gdb_port, |
917 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 918 | |
bb00b29d | 919 | switch (thread->event.ex_type) |
a80b95ba TG |
920 | { |
921 | case EXC_BAD_ACCESS: | |
4e225075 | 922 | status->value.sig = GDB_EXC_BAD_ACCESS; |
a80b95ba TG |
923 | break; |
924 | case EXC_BAD_INSTRUCTION: | |
4e225075 | 925 | status->value.sig = GDB_EXC_BAD_INSTRUCTION; |
a80b95ba TG |
926 | break; |
927 | case EXC_ARITHMETIC: | |
4e225075 | 928 | status->value.sig = GDB_EXC_ARITHMETIC; |
a80b95ba TG |
929 | break; |
930 | case EXC_EMULATION: | |
4e225075 | 931 | status->value.sig = GDB_EXC_EMULATION; |
a80b95ba TG |
932 | break; |
933 | case EXC_SOFTWARE: | |
bb00b29d | 934 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 935 | { |
bb00b29d | 936 | status->value.sig = |
2ea28649 | 937 | gdb_signal_from_host (thread->event.ex_data[1]); |
bb00b29d TG |
938 | inferior_debug (5, _(" (signal %d: %s)\n"), |
939 | thread->event.ex_data[1], | |
2ea28649 | 940 | gdb_signal_to_name (status->value.sig)); |
bb00b29d TG |
941 | |
942 | /* If the thread is stopped because it has received a signal | |
943 | that gdb has just sent, continue. */ | |
944 | if (thread->signaled) | |
945 | { | |
946 | thread->signaled = 0; | |
947 | darwin_send_reply (inf, thread); | |
948 | thread->msg_state = DARWIN_RUNNING; | |
949 | status->kind = TARGET_WAITKIND_IGNORE; | |
950 | } | |
a80b95ba TG |
951 | } |
952 | else | |
4e225075 | 953 | status->value.sig = GDB_EXC_SOFTWARE; |
a80b95ba TG |
954 | break; |
955 | case EXC_BREAKPOINT: | |
956 | /* Many internal GDB routines expect breakpoints to be reported | |
4e225075 | 957 | as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT |
0963b4bd | 958 | as a spurious signal. */ |
a493e3e2 | 959 | status->value.sig = GDB_SIGNAL_TRAP; |
a80b95ba TG |
960 | break; |
961 | default: | |
a493e3e2 | 962 | status->value.sig = GDB_SIGNAL_UNKNOWN; |
a80b95ba TG |
963 | break; |
964 | } | |
965 | ||
bb00b29d TG |
966 | return ptid_build (inf->pid, 0, thread->gdb_port); |
967 | } | |
a41f2563 | 968 | else if (hdr->msgh_id == 0x48) |
bb00b29d | 969 | { |
a41f2563 TG |
970 | /* MACH_NOTIFY_DEAD_NAME: notification for exit. */ |
971 | *pinf = NULL; | |
972 | *pthread = NULL; | |
bb00b29d | 973 | |
a41f2563 TG |
974 | inf = darwin_find_inferior_by_notify (hdr->msgh_local_port); |
975 | if (inf != NULL) | |
976 | { | |
977 | if (!inf->private->no_ptrace) | |
bb00b29d | 978 | { |
a41f2563 TG |
979 | pid_t res; |
980 | int wstatus; | |
981 | ||
982 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
983 | if (res < 0 || res != inf->pid) | |
984 | { | |
985 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
986 | res, safe_strerror (errno)); | |
987 | status->kind = TARGET_WAITKIND_IGNORE; | |
988 | return minus_one_ptid; | |
989 | } | |
990 | if (WIFEXITED (wstatus)) | |
991 | { | |
992 | status->kind = TARGET_WAITKIND_EXITED; | |
993 | status->value.integer = WEXITSTATUS (wstatus); | |
994 | } | |
995 | else | |
996 | { | |
997 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
998 | status->value.sig = WTERMSIG (wstatus); | |
999 | } | |
1000 | ||
1001 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"), | |
1002 | res, wstatus); | |
1003 | ||
1004 | /* Looks necessary on Leopard and harmless... */ | |
1005 | wait4 (inf->pid, &wstatus, 0, NULL); | |
1006 | ||
1007 | return ptid_build (inf->pid, 0, 0); | |
bb00b29d TG |
1008 | } |
1009 | else | |
1010 | { | |
a41f2563 TG |
1011 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
1012 | status->kind = TARGET_WAITKIND_EXITED; | |
1013 | status->value.integer = 0; /* Don't know. */ | |
1014 | return ptid_build (inf->pid, 0, 0); | |
bb00b29d | 1015 | } |
bb00b29d TG |
1016 | } |
1017 | } | |
1018 | ||
a41f2563 | 1019 | /* Unknown message. */ |
86ad98c3 | 1020 | warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id); |
a41f2563 | 1021 | status->kind = TARGET_WAITKIND_IGNORE; |
bb00b29d TG |
1022 | return minus_one_ptid; |
1023 | } | |
1024 | ||
1025 | static int | |
1026 | cancel_breakpoint (ptid_t ptid) | |
1027 | { | |
0963b4bd | 1028 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1029 | the current event, eventually we will resume this thread, and this |
1030 | breakpoint will trap again. | |
1031 | ||
1032 | If we do not do this, then we run the risk that the user will | |
1033 | delete or disable the breakpoint, but the thread will have already | |
1034 | tripped on it. */ | |
1035 | ||
1036 | struct regcache *regcache = get_thread_regcache (ptid); | |
1037 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1038 | CORE_ADDR pc; | |
a80b95ba | 1039 | |
118e6252 | 1040 | pc = regcache_read_pc (regcache) - target_decr_pc_after_break (gdbarch); |
40625c9d | 1041 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc)) |
bb00b29d | 1042 | { |
c8c9911f | 1043 | inferior_debug (4, "cancel_breakpoint for thread 0x%x\n", |
bb00b29d TG |
1044 | ptid_get_tid (ptid)); |
1045 | ||
1046 | /* Back up the PC if necessary. */ | |
118e6252 | 1047 | if (target_decr_pc_after_break (gdbarch)) |
bb00b29d TG |
1048 | regcache_write_pc (regcache, pc); |
1049 | ||
1050 | return 1; | |
a80b95ba | 1051 | } |
bb00b29d TG |
1052 | return 0; |
1053 | } | |
1054 | ||
1055 | static ptid_t | |
1056 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1057 | { | |
1058 | kern_return_t kret; | |
1059 | union | |
1060 | { | |
1061 | mach_msg_header_t hdr; | |
1062 | char data[0x100]; | |
1063 | } msgin; | |
1064 | mach_msg_header_t *hdr = &msgin.hdr; | |
1065 | ptid_t res; | |
1066 | darwin_thread_t *thread; | |
1067 | struct inferior *inf; | |
1068 | ||
1069 | inferior_debug | |
1070 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
1071 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
1072 | ||
1073 | /* Handle fake stop events at first. */ | |
1074 | if (darwin_inf_fake_stop != NULL) | |
1075 | { | |
1076 | inf = darwin_inf_fake_stop; | |
1077 | darwin_inf_fake_stop = NULL; | |
1078 | ||
1079 | status->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 1080 | status->value.sig = GDB_SIGNAL_TRAP; |
bb00b29d TG |
1081 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); |
1082 | thread->msg_state = DARWIN_STOPPED; | |
1083 | return ptid_build (inf->pid, 0, thread->gdb_port); | |
1084 | } | |
1085 | ||
1086 | do | |
1087 | { | |
1088 | /* set_sigint_trap (); */ | |
1089 | ||
1090 | /* Wait for a message. */ | |
1091 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1092 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1093 | ||
1094 | /* clear_sigint_trap (); */ | |
1095 | ||
1096 | if (kret == MACH_RCV_INTERRUPTED) | |
1097 | { | |
1098 | status->kind = TARGET_WAITKIND_IGNORE; | |
1099 | return minus_one_ptid; | |
1100 | } | |
1101 | ||
1102 | if (kret != MACH_MSG_SUCCESS) | |
1103 | { | |
c8c9911f | 1104 | inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret); |
bb00b29d TG |
1105 | status->kind = TARGET_WAITKIND_SPURIOUS; |
1106 | return minus_one_ptid; | |
1107 | } | |
1108 | ||
1109 | /* Debug: display message. */ | |
1110 | if (darwin_debug_flag > 10) | |
1111 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1112 | ||
1113 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
a41f2563 TG |
1114 | if (ptid_equal (res, minus_one_ptid)) |
1115 | continue; | |
bb00b29d | 1116 | |
a41f2563 | 1117 | /* Early return in case an inferior has exited. */ |
bb00b29d TG |
1118 | if (inf == NULL) |
1119 | return res; | |
1120 | } | |
1121 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1122 | ||
1123 | /* Stop all tasks. */ | |
1124 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1125 | ||
1126 | /* Read pending messages. */ | |
1127 | while (1) | |
a80b95ba | 1128 | { |
bb00b29d TG |
1129 | struct target_waitstatus status2; |
1130 | ptid_t ptid2; | |
1131 | ||
1132 | kret = mach_msg (&msgin.hdr, | |
1133 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1134 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1135 | ||
1136 | if (kret == MACH_RCV_TIMED_OUT) | |
1137 | break; | |
1138 | if (kret != MACH_MSG_SUCCESS) | |
1139 | { | |
1140 | inferior_debug | |
c8c9911f | 1141 | (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret); |
bb00b29d TG |
1142 | break; |
1143 | } | |
1144 | ||
a41f2563 TG |
1145 | /* Debug: display message. */ |
1146 | if (darwin_debug_flag > 10) | |
1147 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1148 | ||
bb00b29d | 1149 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); |
a80b95ba | 1150 | |
bb00b29d TG |
1151 | if (inf != NULL && thread != NULL |
1152 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1153 | { |
bb00b29d TG |
1154 | if (thread->single_step |
1155 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) | |
1156 | { | |
1157 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1158 | darwin_send_reply (inf, thread); | |
1159 | thread->msg_state = DARWIN_RUNNING; | |
1160 | } | |
1161 | else | |
1162 | inferior_debug | |
c8c9911f | 1163 | (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"), |
bb00b29d | 1164 | thread->gdb_port); |
a80b95ba | 1165 | } |
bb00b29d TG |
1166 | else |
1167 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1168 | } | |
1169 | return res; | |
1170 | } | |
a80b95ba | 1171 | |
bb00b29d | 1172 | static ptid_t |
a6290449 | 1173 | darwin_wait_to (struct target_ops *ops, |
bb00b29d TG |
1174 | ptid_t ptid, struct target_waitstatus *status, int options) |
1175 | { | |
1176 | return darwin_wait (ptid, status); | |
1177 | } | |
a80b95ba | 1178 | |
bb00b29d | 1179 | static void |
1eab8a48 | 1180 | darwin_stop (struct target_ops *self, ptid_t t) |
bb00b29d TG |
1181 | { |
1182 | struct inferior *inf = current_inferior (); | |
a80b95ba | 1183 | |
bb00b29d TG |
1184 | /* FIXME: handle in no_ptrace mode. */ |
1185 | gdb_assert (!inf->private->no_ptrace); | |
1186 | kill (inf->pid, SIGINT); | |
a80b95ba TG |
1187 | } |
1188 | ||
1189 | static void | |
1190 | darwin_mourn_inferior (struct target_ops *ops) | |
1191 | { | |
1192 | struct inferior *inf = current_inferior (); | |
1193 | kern_return_t kret; | |
1194 | mach_port_t prev; | |
1195 | int i; | |
1196 | ||
1197 | unpush_target (darwin_ops); | |
1198 | ||
1199 | /* Deallocate threads. */ | |
bb00b29d | 1200 | if (inf->private->threads) |
a80b95ba TG |
1201 | { |
1202 | int k; | |
bb00b29d TG |
1203 | darwin_thread_t *t; |
1204 | for (k = 0; | |
1205 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1206 | k++) | |
a80b95ba | 1207 | { |
bb00b29d | 1208 | kret = mach_port_deallocate (gdb_task, t->gdb_port); |
a80b95ba TG |
1209 | MACH_CHECK_ERROR (kret); |
1210 | } | |
bb00b29d TG |
1211 | VEC_free (darwin_thread_t, inf->private->threads); |
1212 | inf->private->threads = NULL; | |
a80b95ba TG |
1213 | } |
1214 | ||
bb00b29d TG |
1215 | kret = mach_port_move_member (gdb_task, |
1216 | inf->private->notify_port, MACH_PORT_NULL); | |
fda184b6 | 1217 | MACH_CHECK_ERROR (kret); |
bb00b29d TG |
1218 | |
1219 | kret = mach_port_request_notification (gdb_task, inf->private->task, | |
a80b95ba | 1220 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1221 | MACH_PORT_NULL, |
a80b95ba TG |
1222 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1223 | &prev); | |
1224 | /* This can fail if the task is dead. */ | |
c8c9911f | 1225 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
bb00b29d TG |
1226 | inf->private->task, prev, inf->private->notify_port); |
1227 | ||
a80b95ba TG |
1228 | if (kret == KERN_SUCCESS) |
1229 | { | |
1230 | kret = mach_port_deallocate (gdb_task, prev); | |
1231 | MACH_CHECK_ERROR (kret); | |
1232 | } | |
1233 | ||
bb00b29d TG |
1234 | kret = mach_port_destroy (gdb_task, inf->private->notify_port); |
1235 | MACH_CHECK_ERROR (kret); | |
1236 | ||
1237 | ||
a80b95ba | 1238 | /* Deallocate saved exception ports. */ |
bb00b29d | 1239 | for (i = 0; i < inf->private->exception_info.count; i++) |
a80b95ba TG |
1240 | { |
1241 | kret = mach_port_deallocate | |
bb00b29d | 1242 | (gdb_task, inf->private->exception_info.ports[i]); |
a80b95ba TG |
1243 | MACH_CHECK_ERROR (kret); |
1244 | } | |
bb00b29d | 1245 | inf->private->exception_info.count = 0; |
a80b95ba | 1246 | |
bb00b29d | 1247 | kret = mach_port_deallocate (gdb_task, inf->private->task); |
a80b95ba TG |
1248 | MACH_CHECK_ERROR (kret); |
1249 | ||
bb00b29d TG |
1250 | xfree (inf->private); |
1251 | inf->private = NULL; | |
a80b95ba TG |
1252 | |
1253 | generic_mourn_inferior (); | |
1254 | } | |
1255 | ||
1256 | static void | |
bb00b29d | 1257 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1258 | { |
bb00b29d TG |
1259 | int k; |
1260 | darwin_thread_t *t; | |
a80b95ba | 1261 | |
bb00b29d TG |
1262 | for (k = 0; |
1263 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1264 | k++) | |
1265 | { | |
1266 | if (t->msg_state == DARWIN_MESSAGE) | |
1267 | darwin_resume_thread (inf, t, 0, 0); | |
1268 | } | |
a80b95ba TG |
1269 | } |
1270 | ||
1271 | static void | |
bb00b29d | 1272 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1273 | { |
1274 | struct target_waitstatus wstatus; | |
1275 | ptid_t ptid; | |
1276 | kern_return_t kret; | |
1277 | int status; | |
1278 | int res; | |
1279 | ||
bb00b29d | 1280 | gdb_assert (inf != NULL); |
a80b95ba | 1281 | |
bb00b29d | 1282 | darwin_suspend_inferior (inf); |
a80b95ba | 1283 | |
bb00b29d | 1284 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1285 | |
bb00b29d TG |
1286 | if (inf->private->no_ptrace) |
1287 | return; | |
a80b95ba | 1288 | |
bb00b29d TG |
1289 | res = kill (inf->pid, SIGSTOP); |
1290 | if (res != 0) | |
b37520b6 | 1291 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1292 | |
bb00b29d TG |
1293 | /* Wait until the process is really stopped. */ |
1294 | while (1) | |
a80b95ba | 1295 | { |
bb00b29d TG |
1296 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1297 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 1298 | && wstatus.value.sig == GDB_SIGNAL_STOP) |
bb00b29d | 1299 | break; |
a80b95ba TG |
1300 | } |
1301 | } | |
1302 | ||
1303 | static kern_return_t | |
1304 | darwin_save_exception_ports (darwin_inferior *inf) | |
1305 | { | |
1306 | kern_return_t kret; | |
1307 | ||
1308 | inf->exception_info.count = | |
1309 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1310 | ||
1311 | kret = task_get_exception_ports | |
1312 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1313 | &inf->exception_info.count, inf->exception_info.ports, | |
1314 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1315 | return kret; | |
1316 | } | |
1317 | ||
1318 | static kern_return_t | |
1319 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1320 | { | |
1321 | int i; | |
1322 | kern_return_t kret; | |
1323 | ||
1324 | for (i = 0; i < inf->exception_info.count; i++) | |
1325 | { | |
1326 | kret = task_set_exception_ports | |
1327 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1328 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1329 | if (kret != KERN_SUCCESS) | |
1330 | return kret; | |
1331 | } | |
1332 | ||
1333 | return KERN_SUCCESS; | |
1334 | } | |
1335 | ||
1336 | static void | |
bb00b29d TG |
1337 | darwin_kill_inferior (struct target_ops *ops) |
1338 | { | |
1339 | struct inferior *inf = current_inferior (); | |
1340 | struct target_waitstatus wstatus; | |
1341 | ptid_t ptid; | |
1342 | kern_return_t kret; | |
1343 | int status; | |
1344 | int res; | |
1345 | ||
1346 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1347 | return; | |
1348 | ||
1349 | gdb_assert (inf != NULL); | |
1350 | ||
ee41036f TG |
1351 | kret = darwin_restore_exception_ports (inf->private); |
1352 | MACH_CHECK_ERROR (kret); | |
bb00b29d | 1353 | |
ee41036f | 1354 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1355 | |
ee41036f | 1356 | res = kill (inf->pid, 9); |
bb00b29d | 1357 | |
ee41036f | 1358 | if (res == 0) |
bb00b29d | 1359 | { |
bb00b29d | 1360 | darwin_resume_inferior (inf); |
a6290449 | 1361 | |
bb00b29d TG |
1362 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1363 | } | |
ee41036f TG |
1364 | else if (errno != ESRCH) |
1365 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1366 | inf->pid, safe_strerror (errno)); | |
bb00b29d TG |
1367 | |
1368 | target_mourn_inferior (); | |
1369 | } | |
1370 | ||
1371 | static void | |
1372 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1373 | { |
a80b95ba TG |
1374 | kern_return_t kret; |
1375 | mach_port_t prev_port; | |
1376 | int traps_expected; | |
bb00b29d | 1377 | mach_port_t prev_not; |
a80b95ba TG |
1378 | exception_mask_t mask; |
1379 | ||
41bf6aca | 1380 | inf->private = XCNEW (darwin_inferior); |
bb00b29d TG |
1381 | |
1382 | kret = task_for_pid (gdb_task, inf->pid, &inf->private->task); | |
a80b95ba TG |
1383 | if (kret != KERN_SUCCESS) |
1384 | { | |
1385 | int status; | |
a80b95ba TG |
1386 | |
1387 | if (!inf->attach_flag) | |
1388 | { | |
bb00b29d TG |
1389 | kill (inf->pid, 9); |
1390 | waitpid (inf->pid, &status, 0); | |
a80b95ba TG |
1391 | } |
1392 | ||
1393 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
15c19d39 | 1394 | " (please check gdb is codesigned - see taskgated(8))"), |
bb00b29d | 1395 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
a80b95ba TG |
1396 | } |
1397 | ||
bb00b29d TG |
1398 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
1399 | inf->private->task, inf->pid); | |
a80b95ba TG |
1400 | |
1401 | if (darwin_ex_port == MACH_PORT_NULL) | |
1402 | { | |
1403 | /* Create a port to get exceptions. */ | |
1404 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1405 | &darwin_ex_port); | |
fda184b6 JB |
1406 | if (kret != KERN_SUCCESS) |
1407 | error (_("Unable to create exception port, mach_port_allocate " | |
1408 | "returned: %d"), | |
1409 | kret); | |
a80b95ba TG |
1410 | |
1411 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, | |
1412 | MACH_MSG_TYPE_MAKE_SEND); | |
fda184b6 JB |
1413 | if (kret != KERN_SUCCESS) |
1414 | error (_("Unable to create exception port, mach_port_insert_right " | |
1415 | "returned: %d"), | |
1416 | kret); | |
a80b95ba TG |
1417 | |
1418 | /* Create a port set and put ex_port in it. */ | |
1419 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1420 | &darwin_port_set); | |
fda184b6 JB |
1421 | if (kret != KERN_SUCCESS) |
1422 | error (_("Unable to create port set, mach_port_allocate " | |
1423 | "returned: %d"), | |
1424 | kret); | |
a80b95ba TG |
1425 | |
1426 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); | |
fda184b6 JB |
1427 | if (kret != KERN_SUCCESS) |
1428 | error (_("Unable to move exception port into new port set, " | |
1429 | "mach_port_move_member\n" | |
1430 | "returned: %d"), | |
1431 | kret); | |
bb00b29d | 1432 | } |
a80b95ba | 1433 | |
bb00b29d TG |
1434 | /* Create a port to be notified when the child task terminates. */ |
1435 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1436 | &inf->private->notify_port); | |
fda184b6 JB |
1437 | if (kret != KERN_SUCCESS) |
1438 | error (_("Unable to create notification port, mach_port_allocate " | |
1439 | "returned: %d"), | |
1440 | kret); | |
a80b95ba | 1441 | |
bb00b29d TG |
1442 | kret = mach_port_move_member (gdb_task, |
1443 | inf->private->notify_port, darwin_port_set); | |
fda184b6 JB |
1444 | if (kret != KERN_SUCCESS) |
1445 | error (_("Unable to move notification port into new port set, " | |
1446 | "mach_port_move_member\n" | |
1447 | "returned: %d"), | |
1448 | kret); | |
a80b95ba | 1449 | |
bb00b29d | 1450 | kret = mach_port_request_notification (gdb_task, inf->private->task, |
a80b95ba | 1451 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1452 | inf->private->notify_port, |
a80b95ba | 1453 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
bb00b29d | 1454 | &prev_not); |
fda184b6 JB |
1455 | if (kret != KERN_SUCCESS) |
1456 | error (_("Termination notification request failed, " | |
1457 | "mach_port_request_notification\n" | |
1458 | "returned: %d"), | |
1459 | kret); | |
1460 | if (prev_not != MACH_PORT_NULL) | |
1461 | { | |
1462 | /* This is unexpected, as there should not be any previously | |
1463 | registered notification request. But this is not a fatal | |
1464 | issue, so just emit a warning. */ | |
1465 | warning (_("\ | |
1466 | A task termination request was registered before the debugger registered\n\ | |
1467 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1468 | impact on the debugging session.")); | |
1469 | } | |
a80b95ba | 1470 | |
bb00b29d | 1471 | kret = darwin_save_exception_ports (inf->private); |
fda184b6 JB |
1472 | if (kret != KERN_SUCCESS) |
1473 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1474 | "returned: %d"), | |
1475 | kret); | |
a80b95ba TG |
1476 | |
1477 | /* Set exception port. */ | |
1478 | if (enable_mach_exceptions) | |
1479 | mask = EXC_MASK_ALL; | |
1480 | else | |
bb00b29d TG |
1481 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
1482 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, | |
1483 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); | |
fda184b6 JB |
1484 | if (kret != KERN_SUCCESS) |
1485 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1486 | "returned: %d"), | |
1487 | kret); | |
a80b95ba TG |
1488 | |
1489 | push_target (darwin_ops); | |
1490 | } | |
1491 | ||
1492 | static void | |
bb00b29d | 1493 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1494 | { |
bb00b29d TG |
1495 | darwin_thread_t *thread; |
1496 | ptid_t new_ptid; | |
a80b95ba TG |
1497 | |
1498 | darwin_check_new_threads (inf); | |
1499 | ||
bb00b29d TG |
1500 | gdb_assert (inf->private->threads |
1501 | && VEC_length (darwin_thread_t, inf->private->threads) > 0); | |
1502 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); | |
1503 | ||
1504 | /* Note: fork_inferior automatically add a thead but it uses a wrong ptid. | |
1505 | Fix up. */ | |
1506 | new_ptid = ptid_build (inf->pid, 0, thread->gdb_port); | |
1507 | thread_change_ptid (inferior_ptid, new_ptid); | |
1508 | inferior_ptid = new_ptid; | |
1509 | } | |
1510 | ||
1511 | /* The child must synchronize with gdb: gdb must set the exception port | |
1512 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1513 | FIXME: is there a lighter way ? */ | |
1514 | static int ptrace_fds[2]; | |
1515 | ||
1516 | static void | |
1517 | darwin_ptrace_me (void) | |
1518 | { | |
1519 | int res; | |
1520 | char c; | |
1521 | ||
1522 | /* Close write end point. */ | |
1523 | close (ptrace_fds[1]); | |
1524 | ||
1525 | /* Wait until gdb is ready. */ | |
1526 | res = read (ptrace_fds[0], &c, 1); | |
fda184b6 JB |
1527 | if (res != 0) |
1528 | error (_("unable to read from pipe, read returned: %d"), res); | |
bb00b29d TG |
1529 | close (ptrace_fds[0]); |
1530 | ||
1531 | /* Get rid of privileges. */ | |
1532 | setegid (getgid ()); | |
1533 | ||
1534 | /* Set TRACEME. */ | |
1535 | PTRACE (PT_TRACE_ME, 0, 0, 0); | |
1536 | ||
1537 | /* Redirect signals to exception port. */ | |
1538 | PTRACE (PT_SIGEXC, 0, 0, 0); | |
1539 | } | |
1540 | ||
1541 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1542 | static void | |
1543 | darwin_pre_ptrace (void) | |
1544 | { | |
1545 | if (pipe (ptrace_fds) != 0) | |
1546 | { | |
1547 | ptrace_fds[0] = -1; | |
1548 | ptrace_fds[1] = -1; | |
1549 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1550 | } | |
21ff4686 TT |
1551 | |
1552 | mark_fd_no_cloexec (ptrace_fds[0]); | |
1553 | mark_fd_no_cloexec (ptrace_fds[1]); | |
a80b95ba TG |
1554 | } |
1555 | ||
1556 | static void | |
1557 | darwin_ptrace_him (int pid) | |
1558 | { | |
1559 | task_t itask; | |
1560 | kern_return_t kret; | |
1561 | mach_port_t prev_port; | |
1562 | int traps_expected; | |
bb00b29d | 1563 | struct inferior *inf = current_inferior (); |
a80b95ba | 1564 | |
bb00b29d | 1565 | darwin_attach_pid (inf); |
a80b95ba TG |
1566 | |
1567 | /* Let's the child run. */ | |
1568 | close (ptrace_fds[0]); | |
1569 | close (ptrace_fds[1]); | |
1570 | ||
21ff4686 TT |
1571 | unmark_fd_no_cloexec (ptrace_fds[0]); |
1572 | unmark_fd_no_cloexec (ptrace_fds[1]); | |
1573 | ||
bb00b29d TG |
1574 | darwin_init_thread_list (inf); |
1575 | ||
a80b95ba TG |
1576 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
1577 | } | |
1578 | ||
e69860f1 TG |
1579 | static void |
1580 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1581 | { | |
1582 | posix_spawnattr_t attr; | |
1583 | short ps_flags = 0; | |
f00c55f8 | 1584 | int res; |
e69860f1 | 1585 | |
f00c55f8 TG |
1586 | res = posix_spawnattr_init (&attr); |
1587 | if (res != 0) | |
e69860f1 TG |
1588 | { |
1589 | fprintf_unfiltered | |
1590 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); | |
1591 | return; | |
1592 | } | |
1593 | ||
1594 | /* Do like execve: replace the image. */ | |
1595 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1596 | ||
1597 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1598 | kernel include files. */ | |
1599 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1600 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1601 | #endif | |
1602 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1603 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1604 | if (res != 0) | |
e69860f1 | 1605 | { |
f00c55f8 | 1606 | fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1607 | return; |
1608 | } | |
1609 | ||
1610 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1611 | } | |
1612 | ||
a80b95ba TG |
1613 | static void |
1614 | darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
1615 | char *allargs, char **env, int from_tty) | |
1616 | { | |
1617 | /* Do the hard work. */ | |
1618 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, darwin_ptrace_him, | |
e69860f1 | 1619 | darwin_pre_ptrace, NULL, darwin_execvp); |
bb00b29d | 1620 | |
a80b95ba TG |
1621 | /* Return now in case of error. */ |
1622 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1623 | return; | |
1624 | } | |
1625 | \f | |
1626 | ||
726ce67c JB |
1627 | /* Set things up such that the next call to darwin_wait will immediately |
1628 | return a fake stop event for inferior INF. | |
1629 | ||
1630 | This assumes that the inferior's thread list has been initialized, | |
1631 | as it will suspend the inferior's first thread. */ | |
1632 | ||
1633 | static void | |
1634 | darwin_setup_fake_stop_event (struct inferior *inf) | |
1635 | { | |
1636 | darwin_thread_t *thread; | |
1637 | kern_return_t kret; | |
1638 | ||
1639 | gdb_assert (darwin_inf_fake_stop == NULL); | |
1640 | darwin_inf_fake_stop = inf; | |
1641 | ||
1642 | /* When detecting a fake pending stop event, darwin_wait returns | |
1643 | an event saying that the first thread is in a DARWIN_STOPPED | |
1644 | state. To make that accurate, we need to suspend that thread | |
1645 | as well. Otherwise, we'll try resuming it when resuming the | |
1646 | inferior, and get a warning because the thread's suspend count | |
1647 | is already zero, making the resume request useless. */ | |
1648 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); | |
1649 | kret = thread_suspend (thread->gdb_port); | |
1650 | MACH_CHECK_ERROR (kret); | |
1651 | } | |
1652 | ||
a80b95ba TG |
1653 | /* Attach to process PID, then initialize for debugging it |
1654 | and wait for the trace-trap that results from attaching. */ | |
1655 | static void | |
1656 | darwin_attach (struct target_ops *ops, char *args, int from_tty) | |
1657 | { | |
1658 | pid_t pid; | |
1659 | pid_t pid2; | |
1660 | int wstatus; | |
1661 | int res; | |
1662 | struct inferior *inf; | |
bb00b29d | 1663 | kern_return_t kret; |
a80b95ba | 1664 | |
74164c56 | 1665 | pid = parse_pid_to_attach (args); |
a80b95ba | 1666 | |
74164c56 | 1667 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1668 | error (_("I refuse to debug myself!")); |
1669 | ||
1670 | if (from_tty) | |
bb00b29d TG |
1671 | { |
1672 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1673 | |
bb00b29d TG |
1674 | if (exec_file) |
1675 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
1676 | target_pid_to_str (pid_to_ptid (pid))); | |
1677 | else | |
1678 | printf_unfiltered (_("Attaching to %s\n"), | |
1679 | target_pid_to_str (pid_to_ptid (pid))); | |
1680 | ||
1681 | gdb_flush (gdb_stdout); | |
1682 | } | |
1683 | ||
1684 | if (pid == 0 || kill (pid, 0) < 0) | |
1685 | error (_("Can't attach to process %d: %s (%d)"), | |
1686 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1687 | |
bb00b29d | 1688 | inferior_ptid = pid_to_ptid (pid); |
6c95b8df PA |
1689 | inf = current_inferior (); |
1690 | inferior_appeared (inf, pid); | |
a80b95ba | 1691 | inf->attach_flag = 1; |
6c95b8df | 1692 | |
bb00b29d TG |
1693 | /* Always add a main thread. */ |
1694 | add_thread_silent (inferior_ptid); | |
a80b95ba | 1695 | |
bb00b29d | 1696 | darwin_attach_pid (inf); |
a80b95ba | 1697 | |
bb00b29d | 1698 | darwin_suspend_inferior (inf); |
a80b95ba | 1699 | |
bb00b29d | 1700 | darwin_init_thread_list (inf); |
a80b95ba | 1701 | |
bb00b29d | 1702 | darwin_check_osabi (inf->private, ptid_get_tid (inferior_ptid)); |
a80b95ba | 1703 | |
726ce67c JB |
1704 | darwin_setup_fake_stop_event (inf); |
1705 | ||
bb00b29d | 1706 | inf->private->no_ptrace = 1; |
a80b95ba TG |
1707 | } |
1708 | ||
1709 | /* Take a program previously attached to and detaches it. | |
1710 | The program resumes execution and will no longer stop | |
1711 | on signals, etc. We'd better not have left any breakpoints | |
1712 | in the program or it'll die when it hits one. For this | |
1713 | to work, it may be necessary for the process to have been | |
1714 | previously attached. It *might* work if the program was | |
1715 | started via fork. */ | |
1716 | static void | |
52554a0e | 1717 | darwin_detach (struct target_ops *ops, const char *args, int from_tty) |
a80b95ba | 1718 | { |
bb00b29d TG |
1719 | pid_t pid = ptid_get_pid (inferior_ptid); |
1720 | struct inferior *inf = current_inferior (); | |
a80b95ba TG |
1721 | kern_return_t kret; |
1722 | int res; | |
1723 | ||
bb00b29d | 1724 | /* Display message. */ |
a80b95ba TG |
1725 | if (from_tty) |
1726 | { | |
1727 | char *exec_file = get_exec_file (0); | |
1728 | if (exec_file == 0) | |
1729 | exec_file = ""; | |
bb00b29d TG |
1730 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
1731 | target_pid_to_str (pid_to_ptid (pid))); | |
a80b95ba TG |
1732 | gdb_flush (gdb_stdout); |
1733 | } | |
1734 | ||
bb00b29d TG |
1735 | /* If ptrace() is in use, stop the process. */ |
1736 | if (!inf->private->no_ptrace) | |
1737 | darwin_stop_inferior (inf); | |
a80b95ba | 1738 | |
bb00b29d | 1739 | kret = darwin_restore_exception_ports (inf->private); |
a80b95ba TG |
1740 | MACH_CHECK_ERROR (kret); |
1741 | ||
bb00b29d | 1742 | if (!inf->private->no_ptrace) |
a80b95ba | 1743 | { |
bb00b29d TG |
1744 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1745 | if (res != 0) | |
1746 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1747 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1748 | } |
1749 | ||
bb00b29d | 1750 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1751 | |
5e9bc145 JB |
1752 | /* When using ptrace, we have just performed a PT_DETACH, which |
1753 | resumes the inferior. On the other hand, when we are not using | |
1754 | ptrace, we need to resume its execution ourselves. */ | |
1755 | if (inf->private->no_ptrace) | |
1756 | darwin_resume_inferior (inf); | |
a80b95ba TG |
1757 | |
1758 | darwin_mourn_inferior (ops); | |
1759 | } | |
1760 | ||
1761 | static void | |
1762 | darwin_files_info (struct target_ops *ops) | |
1763 | { | |
a80b95ba TG |
1764 | } |
1765 | ||
1766 | static char * | |
117de6a9 | 1767 | darwin_pid_to_str (struct target_ops *ops, ptid_t ptid) |
a80b95ba | 1768 | { |
bb00b29d TG |
1769 | static char buf[80]; |
1770 | long tid = ptid_get_tid (ptid); | |
1771 | ||
1772 | if (tid != 0) | |
1773 | { | |
1774 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
1775 | tid, ptid_get_pid (ptid)); | |
1776 | return buf; | |
1777 | } | |
a80b95ba | 1778 | |
bb00b29d | 1779 | return normal_pid_to_str (ptid); |
a80b95ba TG |
1780 | } |
1781 | ||
1782 | static int | |
28439f5e | 1783 | darwin_thread_alive (struct target_ops *ops, ptid_t ptid) |
a80b95ba TG |
1784 | { |
1785 | return 1; | |
1786 | } | |
1787 | ||
1788 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
1789 | copy it to RDADDR in gdb's address space. | |
1790 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
1791 | to ADDR in inferior task's address space. | |
f00c55f8 | 1792 | Return 0 on failure; number of bytes read / writen otherwise. */ |
a80b95ba TG |
1793 | static int |
1794 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 1795 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 1796 | ULONGEST length) |
a80b95ba | 1797 | { |
bb00b29d | 1798 | kern_return_t kret; |
a80b95ba TG |
1799 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
1800 | mach_vm_address_t low_address = (mach_vm_address_t) (addr - offset); | |
1801 | mach_vm_size_t aligned_length = (mach_vm_size_t) PAGE_ROUND (offset + length); | |
1802 | pointer_t copied; | |
b9dd1947 | 1803 | mach_msg_type_number_t copy_count; |
a80b95ba TG |
1804 | mach_vm_size_t remaining_length; |
1805 | mach_vm_address_t region_address; | |
1806 | mach_vm_size_t region_length; | |
1807 | ||
b55e14c7 YQ |
1808 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
1809 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 1810 | |
0963b4bd | 1811 | /* Get memory from inferior with page aligned addresses. */ |
bb00b29d | 1812 | kret = mach_vm_read (task, low_address, aligned_length, |
a80b95ba | 1813 | &copied, ©_count); |
bb00b29d | 1814 | if (kret != KERN_SUCCESS) |
a80b95ba | 1815 | { |
bb00b29d TG |
1816 | inferior_debug |
1817 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
1818 | core_addr_to_string (addr), mach_error_string (kret)); | |
a80b95ba TG |
1819 | return 0; |
1820 | } | |
1821 | ||
1822 | if (rdaddr != NULL) | |
1823 | memcpy (rdaddr, (char *)copied + offset, length); | |
1824 | ||
1825 | if (wraddr == NULL) | |
1826 | goto out; | |
1827 | ||
1828 | memcpy ((char *)copied + offset, wraddr, length); | |
1829 | ||
1830 | /* Do writes atomically. | |
1831 | First check for holes and unwritable memory. */ | |
1832 | for (region_address = low_address, remaining_length = aligned_length; | |
1833 | region_address < low_address + aligned_length; | |
1834 | region_address += region_length, remaining_length -= region_length) | |
1835 | { | |
bb00b29d TG |
1836 | vm_region_submap_short_info_data_64_t info; |
1837 | mach_vm_address_t region_start = region_address; | |
a80b95ba | 1838 | mach_msg_type_number_t count; |
bb00b29d TG |
1839 | natural_t region_depth; |
1840 | ||
1841 | region_depth = 100000; | |
1842 | count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; | |
1843 | kret = mach_vm_region_recurse | |
1844 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
1845 | (vm_region_recurse_info_t) &info, &count); | |
1846 | ||
1847 | if (kret != KERN_SUCCESS) | |
a80b95ba | 1848 | { |
bb00b29d TG |
1849 | inferior_debug (1, _("darwin_read_write_inferior: " |
1850 | "mach_vm_region_recurse failed at %s: %s\n"), | |
1851 | core_addr_to_string (region_address), | |
1852 | mach_error_string (kret)); | |
a80b95ba TG |
1853 | goto out; |
1854 | } | |
1855 | ||
bb00b29d TG |
1856 | inferior_debug |
1857 | (9, _("darwin_read_write_inferior: " | |
1858 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
1859 | core_addr_to_string (region_address), | |
1860 | core_addr_to_string (region_start), | |
1861 | core_addr_to_string (region_length)); | |
1862 | ||
0963b4bd | 1863 | /* Check for holes in memory. */ |
bb00b29d | 1864 | if (region_start > region_address) |
a80b95ba | 1865 | { |
0963b4bd | 1866 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 1867 | core_addr_to_string (region_address), |
bb00b29d | 1868 | core_addr_to_string (region_start), |
a80b95ba TG |
1869 | (unsigned)region_length); |
1870 | length = 0; | |
1871 | goto out; | |
1872 | } | |
1873 | ||
bb00b29d TG |
1874 | /* Adjust the length. */ |
1875 | region_length -= (region_address - region_start); | |
1876 | ||
a80b95ba TG |
1877 | if (!(info.max_protection & VM_PROT_WRITE)) |
1878 | { | |
bb00b29d TG |
1879 | kret = mach_vm_protect |
1880 | (task, region_address, region_length, | |
1881 | TRUE, info.max_protection | VM_PROT_WRITE | VM_PROT_COPY); | |
1882 | if (kret != KERN_SUCCESS) | |
1883 | { | |
1884 | warning (_("darwin_read_write_inf: " | |
1885 | "mach_vm_protect max failed at %s: %s"), | |
1886 | core_addr_to_string (region_address), | |
1887 | mach_error_string (kret)); | |
1888 | length = 0; | |
1889 | goto out; | |
1890 | } | |
a80b95ba TG |
1891 | } |
1892 | ||
1893 | if (!(info.protection & VM_PROT_WRITE)) | |
1894 | { | |
bb00b29d | 1895 | kret = mach_vm_protect (task, region_address, region_length, |
a80b95ba | 1896 | FALSE, info.protection | VM_PROT_WRITE); |
bb00b29d | 1897 | if (kret != KERN_SUCCESS) |
a80b95ba | 1898 | { |
bb00b29d TG |
1899 | warning (_("darwin_read_write_inf: " |
1900 | "mach_vm_protect failed at %s (len=0x%lx): %s"), | |
1901 | core_addr_to_string (region_address), | |
1902 | (unsigned long)region_length, mach_error_string (kret)); | |
a80b95ba TG |
1903 | length = 0; |
1904 | goto out; | |
1905 | } | |
1906 | } | |
1907 | } | |
1908 | ||
bb00b29d | 1909 | kret = mach_vm_write (task, low_address, copied, aligned_length); |
a80b95ba | 1910 | |
bb00b29d | 1911 | if (kret != KERN_SUCCESS) |
a80b95ba TG |
1912 | { |
1913 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
bb00b29d | 1914 | mach_error_string (kret)); |
a80b95ba TG |
1915 | length = 0; |
1916 | } | |
1917 | out: | |
1918 | mach_vm_deallocate (mach_task_self (), copied, copy_count); | |
1919 | return length; | |
1920 | } | |
1921 | ||
f00c55f8 TG |
1922 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
1923 | to RDADDR. | |
569283d4 | 1924 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 1925 | |
b967eb24 | 1926 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 1927 | /* This is not available in Darwin 9. */ |
9b409511 | 1928 | static enum target_xfer_status |
b9dd1947 | 1929 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 1930 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
1931 | { |
1932 | struct task_dyld_info task_dyld_info; | |
1933 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
1934 | int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t); | |
1935 | kern_return_t kret; | |
1936 | ||
1937 | if (addr >= sz) | |
9b409511 | 1938 | return TARGET_XFER_EOF; |
f00c55f8 TG |
1939 | |
1940 | kret = task_info (task, TASK_DYLD_INFO, (task_info_t) &task_dyld_info, &count); | |
1941 | MACH_CHECK_ERROR (kret); | |
1942 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 1943 | return TARGET_XFER_E_IO; |
f00c55f8 TG |
1944 | /* Truncate. */ |
1945 | if (addr + length > sz) | |
1946 | length = sz - addr; | |
1947 | memcpy (rdaddr, (char *)&task_dyld_info + addr, length); | |
9b409511 YQ |
1948 | *xfered_len = (ULONGEST) length; |
1949 | return TARGET_XFER_OK; | |
f00c55f8 | 1950 | } |
569283d4 | 1951 | #endif |
f00c55f8 | 1952 | |
a80b95ba | 1953 | \f |
a80b95ba | 1954 | |
1b281443 | 1955 | static enum target_xfer_status |
a80b95ba TG |
1956 | darwin_xfer_partial (struct target_ops *ops, |
1957 | enum target_object object, const char *annex, | |
1958 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1959 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
a80b95ba | 1960 | { |
bb00b29d TG |
1961 | struct inferior *inf = current_inferior (); |
1962 | ||
1963 | inferior_debug | |
b55e14c7 YQ |
1964 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
1965 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
1966 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
1967 | inf->pid); | |
a80b95ba | 1968 | |
f00c55f8 TG |
1969 | switch (object) |
1970 | { | |
1971 | case TARGET_OBJECT_MEMORY: | |
9b409511 YQ |
1972 | { |
1973 | int l = darwin_read_write_inferior (inf->private->task, offset, | |
1974 | readbuf, writebuf, len); | |
1975 | ||
1976 | if (l == 0) | |
1977 | return TARGET_XFER_EOF; | |
1978 | else | |
1979 | { | |
1980 | gdb_assert (l > 0); | |
1981 | *xfered_len = (ULONGEST) l; | |
1982 | return TARGET_XFER_OK; | |
1983 | } | |
1984 | } | |
569283d4 | 1985 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
1986 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
1987 | if (writebuf != NULL || readbuf == NULL) | |
1988 | { | |
1989 | /* Support only read. */ | |
2ed4b548 | 1990 | return TARGET_XFER_E_IO; |
f00c55f8 | 1991 | } |
9b409511 YQ |
1992 | return darwin_read_dyld_info (inf->private->task, offset, readbuf, len, |
1993 | xfered_len); | |
569283d4 | 1994 | #endif |
f00c55f8 | 1995 | default: |
2ed4b548 | 1996 | return TARGET_XFER_E_IO; |
f00c55f8 | 1997 | } |
a80b95ba | 1998 | |
a80b95ba TG |
1999 | } |
2000 | ||
2001 | static void | |
2002 | set_enable_mach_exceptions (char *args, int from_tty, | |
2003 | struct cmd_list_element *c) | |
2004 | { | |
bb00b29d | 2005 | if (!ptid_equal (inferior_ptid, null_ptid)) |
a80b95ba | 2006 | { |
bb00b29d | 2007 | struct inferior *inf = current_inferior (); |
a80b95ba TG |
2008 | exception_mask_t mask; |
2009 | kern_return_t kret; | |
2010 | ||
2011 | if (enable_mach_exceptions) | |
2012 | mask = EXC_MASK_ALL; | |
2013 | else | |
2014 | { | |
bb00b29d TG |
2015 | darwin_restore_exception_ports (inf->private); |
2016 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
a80b95ba | 2017 | } |
bb00b29d | 2018 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, |
a80b95ba TG |
2019 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2020 | MACH_CHECK_ERROR (kret); | |
2021 | } | |
2022 | } | |
2023 | ||
bb00b29d | 2024 | static char * |
8dd27370 | 2025 | darwin_pid_to_exec_file (struct target_ops *self, int pid) |
bb00b29d | 2026 | { |
b4ab256d | 2027 | static char path[PATH_MAX]; |
bb00b29d TG |
2028 | int res; |
2029 | ||
d8d2a3ee | 2030 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2031 | if (res >= 0) |
2032 | return path; | |
2033 | else | |
2034 | return NULL; | |
2035 | } | |
2036 | ||
2037 | static ptid_t | |
1e6b91a4 | 2038 | darwin_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) |
bb00b29d TG |
2039 | { |
2040 | int i; | |
2041 | darwin_thread_t *t; | |
2042 | int k; | |
2043 | struct inferior *inf = current_inferior (); | |
2044 | kern_return_t kret; | |
2045 | mach_port_name_array_t names; | |
2046 | mach_msg_type_number_t names_count; | |
2047 | mach_port_type_array_t types; | |
2048 | mach_msg_type_number_t types_count; | |
2049 | long res = 0; | |
2050 | ||
2051 | /* First linear search. */ | |
2052 | for (k = 0; | |
2053 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
2054 | k++) | |
2055 | if (t->inf_port == lwp) | |
2056 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); | |
2057 | ||
2058 | /* Maybe the port was never extract. Do it now. */ | |
2059 | ||
2060 | /* First get inferior port names. */ | |
2061 | kret = mach_port_names (inf->private->task, &names, &names_count, &types, | |
2062 | &types_count); | |
2063 | MACH_CHECK_ERROR (kret); | |
2064 | if (kret != KERN_SUCCESS) | |
2065 | return null_ptid; | |
2066 | ||
2067 | /* For each name, copy the right in the gdb space and then compare with | |
2068 | our view of the inferior threads. We don't forget to deallocate the | |
2069 | right. */ | |
2070 | for (i = 0; i < names_count; i++) | |
2071 | { | |
2072 | mach_port_t local_name; | |
2073 | mach_msg_type_name_t local_type; | |
2074 | ||
2075 | /* We just need to know the corresponding name in gdb name space. | |
2076 | So extract and deallocate the right. */ | |
2077 | kret = mach_port_extract_right (inf->private->task, names[i], | |
2078 | MACH_MSG_TYPE_COPY_SEND, | |
2079 | &local_name, &local_type); | |
2080 | if (kret != KERN_SUCCESS) | |
2081 | continue; | |
2082 | mach_port_deallocate (gdb_task, local_name); | |
2083 | ||
2084 | for (k = 0; | |
2085 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
2086 | k++) | |
2087 | if (t->gdb_port == local_name) | |
2088 | { | |
2089 | t->inf_port = names[i]; | |
2090 | if (names[i] == lwp) | |
2091 | res = t->gdb_port; | |
2092 | } | |
2093 | } | |
2094 | ||
2095 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2096 | names_count * sizeof (mach_port_t)); | |
2097 | ||
2098 | if (res) | |
2099 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); | |
2100 | else | |
2101 | return null_ptid; | |
2102 | } | |
2103 | ||
2104 | static int | |
86ce2668 | 2105 | darwin_supports_multi_process (struct target_ops *self) |
bb00b29d TG |
2106 | { |
2107 | return 1; | |
2108 | } | |
2109 | ||
c381a3f6 JB |
2110 | /* -Wmissing-prototypes */ |
2111 | extern initialize_file_ftype _initialize_darwin_inferior; | |
2112 | ||
a80b95ba | 2113 | void |
bb00b29d | 2114 | _initialize_darwin_inferior (void) |
a80b95ba TG |
2115 | { |
2116 | kern_return_t kret; | |
2117 | ||
a80b95ba TG |
2118 | gdb_task = mach_task_self (); |
2119 | darwin_host_self = mach_host_self (); | |
2120 | ||
2121 | /* Read page size. */ | |
2122 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2123 | if (kret != KERN_SUCCESS) | |
2124 | { | |
2125 | mach_page_size = 0x1000; | |
2126 | MACH_CHECK_ERROR (kret); | |
2127 | } | |
2128 | ||
a80b95ba TG |
2129 | darwin_ops = inf_child_target (); |
2130 | ||
2131 | darwin_ops->to_shortname = "darwin-child"; | |
2132 | darwin_ops->to_longname = _("Darwin child process"); | |
2133 | darwin_ops->to_doc = | |
2134 | _("Darwin child process (started by the \"run\" command)."); | |
2135 | darwin_ops->to_create_inferior = darwin_create_inferior; | |
2136 | darwin_ops->to_attach = darwin_attach; | |
2137 | darwin_ops->to_attach_no_wait = 0; | |
2138 | darwin_ops->to_detach = darwin_detach; | |
2139 | darwin_ops->to_files_info = darwin_files_info; | |
bb00b29d | 2140 | darwin_ops->to_wait = darwin_wait_to; |
a80b95ba TG |
2141 | darwin_ops->to_mourn_inferior = darwin_mourn_inferior; |
2142 | darwin_ops->to_kill = darwin_kill_inferior; | |
2143 | darwin_ops->to_stop = darwin_stop; | |
bb00b29d | 2144 | darwin_ops->to_resume = darwin_resume_to; |
a80b95ba TG |
2145 | darwin_ops->to_thread_alive = darwin_thread_alive; |
2146 | darwin_ops->to_pid_to_str = darwin_pid_to_str; | |
bb00b29d | 2147 | darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file; |
a80b95ba | 2148 | darwin_ops->to_load = NULL; |
a80b95ba | 2149 | darwin_ops->to_xfer_partial = darwin_xfer_partial; |
bb00b29d TG |
2150 | darwin_ops->to_supports_multi_process = darwin_supports_multi_process; |
2151 | darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid; | |
a80b95ba TG |
2152 | |
2153 | darwin_complete_target (darwin_ops); | |
2154 | ||
2155 | add_target (darwin_ops); | |
2156 | ||
2157 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), mach_task_self (), | |
2158 | getpid ()); | |
2159 | ||
ccce17b0 YQ |
2160 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2161 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2162 | Set if printing inferior communication debugging statements."), _("\ |
2163 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2164 | NULL, NULL, |
2165 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2166 | |
2167 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2168 | &enable_mach_exceptions, _("\ | |
2169 | Set if mach exceptions are caught."), _("\ | |
2170 | Show if mach exceptions are caught."), _("\ | |
2171 | When this mode is on, all low level exceptions are reported before being\n\ | |
2172 | reported by the kernel."), | |
2173 | &set_enable_mach_exceptions, NULL, | |
2174 | &setlist, &showlist); | |
2175 | } |