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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
7b6bb8da | 2 | Copyright (C) 2008, 2009, 2010, 2011 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> | |
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" | |
67 | ||
68 | /* Quick overview. | |
69 | Darwin kernel is Mach + BSD derived kernel. Note that they share the | |
70 | same memory space and are linked together (ie there is no micro-kernel). | |
71 | ||
72 | Although ptrace(2) is available on Darwin, it is not complete. We have | |
73 | to use Mach calls to read and write memory and to modify registers. We | |
74 | also use Mach to get inferior faults. As we cannot use select(2) or | |
75 | signals with Mach port (the Mach communication channel), signals are | |
76 | reported to gdb as an exception. Furthermore we detect death of the | |
77 | inferior through a Mach notification message. This way we only wait | |
78 | on Mach ports. | |
79 | ||
80 | Some Mach documentation is available for Apple xnu source package or | |
81 | from the web. */ | |
82 | ||
83 | ||
84 | #define PTRACE(CMD, PID, ADDR, SIG) \ | |
85 | darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG)) | |
86 | ||
87 | extern boolean_t exc_server (mach_msg_header_t *in, mach_msg_header_t *out); | |
88 | ||
89 | static void darwin_stop (ptid_t); | |
90 | ||
bb00b29d TG |
91 | static void darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, |
92 | enum target_signal signal); | |
93 | static void darwin_resume (ptid_t ptid, int step, | |
94 | enum target_signal signal); | |
95 | ||
96 | static ptid_t darwin_wait_to (struct target_ops *ops, ptid_t ptid, | |
97 | struct target_waitstatus *status, int options); | |
98 | static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status); | |
99 | ||
a80b95ba TG |
100 | static void darwin_mourn_inferior (struct target_ops *ops); |
101 | ||
2ab1c2d9 | 102 | static void darwin_kill_inferior (struct target_ops *ops); |
a80b95ba TG |
103 | |
104 | static void darwin_ptrace_me (void); | |
105 | ||
106 | static void darwin_ptrace_him (int pid); | |
107 | ||
108 | static void darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
109 | char *allargs, char **env, int from_tty); | |
110 | ||
111 | static void darwin_files_info (struct target_ops *ops); | |
112 | ||
bb00b29d TG |
113 | static char *darwin_pid_to_str (struct target_ops *ops, ptid_t tpid); |
114 | ||
115 | static int darwin_thread_alive (struct target_ops *ops, ptid_t tpid); | |
a80b95ba TG |
116 | |
117 | /* Target operations for Darwin. */ | |
118 | static struct target_ops *darwin_ops; | |
119 | ||
120 | /* Task identifier of gdb. */ | |
121 | static task_t gdb_task; | |
122 | ||
123 | /* A copy of mach_host_self (). */ | |
124 | mach_port_t darwin_host_self; | |
125 | ||
126 | /* Exception port. */ | |
127 | mach_port_t darwin_ex_port; | |
128 | ||
a80b95ba TG |
129 | /* Port set. */ |
130 | mach_port_t darwin_port_set; | |
131 | ||
0963b4bd | 132 | /* Page size. */ |
a80b95ba TG |
133 | static vm_size_t mach_page_size; |
134 | ||
135 | /* If Set, catch all mach exceptions (before they are converted to signals | |
136 | by the kernel). */ | |
137 | static int enable_mach_exceptions; | |
138 | ||
bb00b29d TG |
139 | /* Inferior that should report a fake stop event. */ |
140 | static struct inferior *darwin_inf_fake_stop; | |
141 | ||
a80b95ba TG |
142 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
143 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
144 | ||
bb00b29d | 145 | /* This controls output of inferior debugging. */ |
a80b95ba TG |
146 | static int darwin_debug_flag = 0; |
147 | ||
15c19d39 TG |
148 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
149 | be signed. This is required to get an authorization for task_for_pid. | |
150 | ||
151 | Once gdb is built, you can either: | |
152 | * make it setgid procmod | |
153 | * or codesign it with any system-trusted signing authority. | |
154 | See taskgated(8) for details. */ | |
155 | static const unsigned char info_plist[] | |
156 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
157 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
158 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
159 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
160 | "<plist version=\"1.0\">\n" | |
161 | "<dict>\n" | |
162 | " <key>CFBundleIdentifier</key>\n" | |
163 | " <string>org.gnu.gdb</string>\n" | |
164 | " <key>CFBundleName</key>\n" | |
165 | " <string>gdb</string>\n" | |
166 | " <key>CFBundleVersion</key>\n" | |
167 | " <string>1.0</string>\n" | |
168 | " <key>SecTaskAccess</key>\n" | |
169 | " <array>\n" | |
170 | " <string>allowed</string>\n" | |
171 | " <string>debug</string>\n" | |
172 | " </array>\n" | |
173 | "</dict>\n" | |
174 | "</plist>\n"; | |
175 | ||
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 | |
324 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:%x old_id:%x\n"), | |
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 | |
bb00b29d TG |
352 | pti = XZALLOC (struct private_thread_info); |
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; | |
494 | const unsigned long *ldata; | |
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:")); | |
540 | ldata = (const unsigned long *)data; | |
541 | for (i = 0; i < size / sizeof (unsigned long); i++) | |
542 | printf_unfiltered (" %08lx", ldata[i]); | |
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 | |
bb00b29d TG |
563 | /* Check message identifier. 2401 is exc. */ |
564 | if (hdr->msgh_id != 2401) | |
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 | ||
594 | /* Find process by port. */ | |
595 | task_port = desc[1].name; | |
596 | thread_port = desc[0].name; | |
597 | inf = darwin_find_inferior_by_task (task_port); | |
598 | if (inf == NULL) | |
599 | return -1; | |
600 | *pinf = inf; | |
601 | ||
602 | /* Find thread by port. */ | |
603 | /* Check for new threads. Do it early so that the port in the exception | |
604 | message can be deallocated. */ | |
605 | darwin_check_new_threads (inf); | |
606 | ||
607 | /* We got new rights to the task and the thread. Get rid of them. */ | |
a80b95ba TG |
608 | kret = mach_port_deallocate (mach_task_self (), task_port); |
609 | MACH_CHECK_ERROR (kret); | |
610 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
611 | MACH_CHECK_ERROR (kret); | |
612 | ||
bb00b29d TG |
613 | thread = darwin_find_thread (inf, thread_port); |
614 | if (thread == NULL) | |
615 | return -1; | |
616 | *pthread = thread; | |
617 | ||
484a26a8 TG |
618 | /* The thread should be running. However we have observed cases where a thread |
619 | got a SIGTTIN message after being stopped. */ | |
620 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); | |
621 | ||
bb00b29d | 622 | /* Finish decoding. */ |
bb00b29d TG |
623 | thread->event.header = *hdr; |
624 | thread->event.thread_port = thread_port; | |
625 | thread->event.task_port = task_port; | |
626 | thread->event.ex_type = data[0]; | |
627 | thread->event.data_count = data[1]; | |
628 | ||
629 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
630 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
631 | + data[1] * sizeof (integer_t))) | |
632 | return -1; | |
633 | for (i = 0; i < data[1]; i++) | |
634 | thread->event.ex_data[i] = data[2 + i]; | |
635 | ||
636 | thread->msg_state = DARWIN_MESSAGE; | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
641 | static void | |
642 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
643 | integer_t code) | |
644 | { | |
645 | mach_msg_header_t *rh = &reply->Head; | |
646 | rh->msgh_bits = MACH_MSGH_BITS(MACH_MSGH_BITS_REMOTE(hdr->msgh_bits), 0); | |
647 | rh->msgh_remote_port = hdr->msgh_remote_port; | |
648 | rh->msgh_size = (mach_msg_size_t)sizeof(mig_reply_error_t); | |
649 | rh->msgh_local_port = MACH_PORT_NULL; | |
650 | rh->msgh_id = hdr->msgh_id + 100; | |
651 | ||
652 | reply->NDR = NDR_record; | |
653 | reply->RetCode = code; | |
a80b95ba TG |
654 | } |
655 | ||
bb00b29d TG |
656 | static void |
657 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
658 | { |
659 | kern_return_t kret; | |
bb00b29d | 660 | mig_reply_error_t reply; |
a80b95ba | 661 | |
bb00b29d TG |
662 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
663 | ||
664 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
665 | reply.Head.msgh_size, 0, | |
666 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
667 | MACH_PORT_NULL); | |
a80b95ba TG |
668 | MACH_CHECK_ERROR (kret); |
669 | ||
bb00b29d TG |
670 | inf->private->pending_messages--; |
671 | } | |
672 | ||
673 | static void | |
674 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
675 | int step, int nsignal) | |
676 | { | |
677 | kern_return_t kret; | |
678 | int res; | |
679 | ||
a80b95ba | 680 | inferior_debug |
bb00b29d TG |
681 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
682 | thread->msg_state, thread->gdb_port, step, nsignal); | |
683 | ||
684 | switch (thread->msg_state) | |
a80b95ba | 685 | { |
bb00b29d TG |
686 | case DARWIN_MESSAGE: |
687 | if (thread->event.ex_type == EXC_SOFTWARE | |
688 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
689 | { | |
690 | /* Either deliver a new signal or cancel the signal received. */ | |
691 | res = PTRACE (PT_THUPDATE, inf->pid, | |
692 | (void *)(uintptr_t)thread->gdb_port, nsignal); | |
693 | if (res < 0) | |
694 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
695 | } | |
696 | else if (nsignal) | |
697 | { | |
698 | /* Note: ptrace is allowed only if the process is stopped. | |
699 | Directly send the signal to the thread. */ | |
700 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
701 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), | |
702 | thread->gdb_port, nsignal, res); | |
703 | thread->signaled = 1; | |
704 | } | |
705 | ||
706 | /* Set single step. */ | |
707 | inferior_debug (4, _("darwin_set_sstep (thread=%x, enable=%d)\n"), | |
708 | thread->gdb_port, step); | |
709 | darwin_set_sstep (thread->gdb_port, step); | |
710 | thread->single_step = step; | |
711 | ||
712 | darwin_send_reply (inf, thread); | |
713 | thread->msg_state = DARWIN_RUNNING; | |
714 | break; | |
715 | ||
716 | case DARWIN_RUNNING: | |
717 | break; | |
718 | ||
719 | case DARWIN_STOPPED: | |
720 | kret = thread_resume (thread->gdb_port); | |
721 | MACH_CHECK_ERROR (kret); | |
722 | ||
723 | thread->msg_state = DARWIN_RUNNING; | |
724 | break; | |
a80b95ba | 725 | } |
bb00b29d | 726 | } |
a80b95ba | 727 | |
bb00b29d | 728 | /* Resume all threads of the inferior. */ |
a80b95ba | 729 | |
bb00b29d TG |
730 | static void |
731 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
732 | { | |
733 | darwin_thread_t *thread; | |
734 | int k; | |
735 | ||
736 | for (k = 0; | |
737 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); | |
738 | k++) | |
739 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
740 | } |
741 | ||
bb00b29d | 742 | struct resume_inferior_threads_param |
a80b95ba | 743 | { |
bb00b29d TG |
744 | int step; |
745 | int nsignal; | |
746 | }; | |
747 | ||
748 | static int | |
749 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
750 | { | |
751 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
752 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
753 | ||
754 | darwin_resume_inferior_threads (inf, step, nsignal); | |
755 | ||
756 | return 0; | |
757 | } | |
758 | ||
759 | /* Suspend all threads of INF. */ | |
760 | ||
761 | static void | |
762 | darwin_suspend_inferior_threads (struct inferior *inf) | |
763 | { | |
764 | darwin_thread_t *thread; | |
a80b95ba | 765 | kern_return_t kret; |
bb00b29d TG |
766 | int k; |
767 | ||
768 | for (k = 0; | |
769 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); | |
770 | k++) | |
771 | switch (thread->msg_state) | |
772 | { | |
773 | case DARWIN_STOPPED: | |
774 | case DARWIN_MESSAGE: | |
775 | break; | |
776 | case DARWIN_RUNNING: | |
777 | kret = thread_suspend (thread->gdb_port); | |
778 | MACH_CHECK_ERROR (kret); | |
779 | thread->msg_state = DARWIN_STOPPED; | |
780 | break; | |
781 | } | |
782 | } | |
a80b95ba | 783 | |
bb00b29d TG |
784 | static void |
785 | darwin_resume (ptid_t ptid, int step, enum target_signal signal) | |
786 | { | |
787 | struct target_waitstatus status; | |
788 | int pid; | |
a80b95ba | 789 | |
bb00b29d TG |
790 | kern_return_t kret; |
791 | int res; | |
792 | int nsignal; | |
793 | struct inferior *inf; | |
a80b95ba | 794 | |
bb00b29d TG |
795 | inferior_debug |
796 | (2, _("darwin_resume: pid=%d, tid=0x%x, step=%d, signal=%d\n"), | |
797 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); | |
798 | ||
799 | if (signal == TARGET_SIGNAL_0) | |
800 | nsignal = 0; | |
801 | else | |
802 | nsignal = target_signal_to_host (signal); | |
a80b95ba | 803 | |
bb00b29d TG |
804 | /* Don't try to single step all threads. */ |
805 | if (step) | |
806 | ptid = inferior_ptid; | |
807 | ||
808 | /* minus_one_ptid is RESUME_ALL. */ | |
809 | if (ptid_equal (ptid, minus_one_ptid)) | |
a80b95ba | 810 | { |
bb00b29d TG |
811 | struct resume_inferior_threads_param param; |
812 | ||
813 | param.nsignal = nsignal; | |
814 | param.step = step; | |
a80b95ba | 815 | |
bb00b29d TG |
816 | /* Resume threads. */ |
817 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
818 | /* Resume tasks. */ | |
819 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
820 | } | |
821 | else | |
a80b95ba | 822 | { |
bb00b29d TG |
823 | struct inferior *inf = find_inferior_pid (ptid_get_pid (ptid)); |
824 | long tid = ptid_get_tid (ptid); | |
825 | ||
826 | /* Stop the inferior (should be useless). */ | |
827 | darwin_suspend_inferior (inf); | |
828 | ||
829 | if (tid == 0) | |
830 | darwin_resume_inferior_threads (inf, step, nsignal); | |
831 | else | |
832 | { | |
833 | darwin_thread_t *thread; | |
834 | ||
835 | /* Suspend threads of the task. */ | |
836 | darwin_suspend_inferior_threads (inf); | |
837 | ||
838 | /* Resume the selected thread. */ | |
839 | thread = darwin_find_thread (inf, tid); | |
840 | gdb_assert (thread); | |
841 | darwin_resume_thread (inf, thread, step, nsignal); | |
842 | } | |
843 | ||
844 | /* Resume the task. */ | |
845 | darwin_resume_inferior (inf); | |
a80b95ba | 846 | } |
bb00b29d | 847 | } |
a80b95ba | 848 | |
bb00b29d TG |
849 | static void |
850 | darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, | |
851 | enum target_signal signal) | |
852 | { | |
853 | return darwin_resume (ptid, step, signal); | |
854 | } | |
855 | ||
856 | static ptid_t | |
857 | darwin_decode_message (mach_msg_header_t *hdr, | |
858 | darwin_thread_t **pthread, | |
859 | struct inferior **pinf, | |
860 | struct target_waitstatus *status) | |
861 | { | |
862 | darwin_thread_t *thread; | |
863 | struct inferior *inf; | |
a80b95ba TG |
864 | |
865 | /* Exception message. */ | |
866 | if (hdr->msgh_local_port == darwin_ex_port) | |
867 | { | |
bb00b29d TG |
868 | int res; |
869 | ||
870 | /* Decode message. */ | |
871 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
872 | ||
873 | if (res < 0) | |
a80b95ba | 874 | { |
bb00b29d TG |
875 | /* Should not happen... */ |
876 | printf_unfiltered (_("darwin_wait: ill-formatted message (id=%x)\n"), | |
a80b95ba | 877 | hdr->msgh_id); |
bb00b29d | 878 | /* FIXME: send a failure reply? */ |
a80b95ba TG |
879 | status->kind = TARGET_WAITKIND_SPURIOUS; |
880 | return minus_one_ptid; | |
881 | } | |
bb00b29d TG |
882 | *pinf = inf; |
883 | *pthread = thread; | |
884 | inf->private->pending_messages++; | |
a80b95ba TG |
885 | |
886 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
887 | thread->msg_state = DARWIN_MESSAGE; |
888 | ||
889 | inferior_debug (4, _("darwin_wait: thread=%x, got %s\n"), | |
890 | thread->gdb_port, | |
891 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 892 | |
bb00b29d | 893 | switch (thread->event.ex_type) |
a80b95ba TG |
894 | { |
895 | case EXC_BAD_ACCESS: | |
896 | status->value.sig = TARGET_EXC_BAD_ACCESS; | |
897 | break; | |
898 | case EXC_BAD_INSTRUCTION: | |
899 | status->value.sig = TARGET_EXC_BAD_INSTRUCTION; | |
900 | break; | |
901 | case EXC_ARITHMETIC: | |
902 | status->value.sig = TARGET_EXC_ARITHMETIC; | |
903 | break; | |
904 | case EXC_EMULATION: | |
905 | status->value.sig = TARGET_EXC_EMULATION; | |
906 | break; | |
907 | case EXC_SOFTWARE: | |
bb00b29d | 908 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 909 | { |
bb00b29d TG |
910 | status->value.sig = |
911 | target_signal_from_host (thread->event.ex_data[1]); | |
912 | inferior_debug (5, _(" (signal %d: %s)\n"), | |
913 | thread->event.ex_data[1], | |
a80b95ba | 914 | target_signal_to_name (status->value.sig)); |
bb00b29d TG |
915 | |
916 | /* If the thread is stopped because it has received a signal | |
917 | that gdb has just sent, continue. */ | |
918 | if (thread->signaled) | |
919 | { | |
920 | thread->signaled = 0; | |
921 | darwin_send_reply (inf, thread); | |
922 | thread->msg_state = DARWIN_RUNNING; | |
923 | status->kind = TARGET_WAITKIND_IGNORE; | |
924 | } | |
a80b95ba TG |
925 | } |
926 | else | |
bb00b29d | 927 | status->value.sig = TARGET_EXC_SOFTWARE; |
a80b95ba TG |
928 | break; |
929 | case EXC_BREAKPOINT: | |
930 | /* Many internal GDB routines expect breakpoints to be reported | |
931 | as TARGET_SIGNAL_TRAP, and will report TARGET_EXC_BREAKPOINT | |
0963b4bd | 932 | as a spurious signal. */ |
a80b95ba TG |
933 | status->value.sig = TARGET_SIGNAL_TRAP; |
934 | break; | |
935 | default: | |
936 | status->value.sig = TARGET_SIGNAL_UNKNOWN; | |
937 | break; | |
938 | } | |
939 | ||
bb00b29d TG |
940 | return ptid_build (inf->pid, 0, thread->gdb_port); |
941 | } | |
942 | ||
943 | *pinf = NULL; | |
944 | *pthread = NULL; | |
945 | ||
946 | inf = darwin_find_inferior_by_notify (hdr->msgh_local_port); | |
947 | if (inf != NULL) | |
948 | { | |
949 | if (!inf->private->no_ptrace) | |
950 | { | |
951 | pid_t res; | |
952 | int wstatus; | |
953 | ||
954 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
955 | if (res < 0 || res != inf->pid) | |
956 | { | |
957 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
958 | res, safe_strerror (errno)); | |
959 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
960 | return minus_one_ptid; | |
961 | } | |
962 | if (WIFEXITED (wstatus)) | |
963 | { | |
964 | status->kind = TARGET_WAITKIND_EXITED; | |
965 | status->value.integer = WEXITSTATUS (wstatus); | |
966 | } | |
967 | else | |
968 | { | |
969 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
970 | status->value.sig = WTERMSIG (wstatus); | |
971 | } | |
972 | ||
973 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=%x\n"), | |
974 | res, wstatus); | |
975 | ||
976 | /* Looks necessary on Leopard and harmless... */ | |
977 | wait4 (inf->pid, &wstatus, 0, NULL); | |
978 | ||
979 | return ptid_build (inf->pid, 0, 0); | |
980 | } | |
981 | else | |
982 | { | |
983 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); | |
984 | status->kind = TARGET_WAITKIND_EXITED; | |
985 | status->value.integer = 0; /* Don't know. */ | |
986 | return ptid_build (inf->pid, 0, 0); | |
987 | } | |
988 | } | |
989 | ||
990 | printf_unfiltered (_("Bad local-port: %x\n"), hdr->msgh_local_port); | |
991 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
992 | return minus_one_ptid; | |
993 | } | |
994 | ||
995 | static int | |
996 | cancel_breakpoint (ptid_t ptid) | |
997 | { | |
0963b4bd | 998 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
999 | the current event, eventually we will resume this thread, and this |
1000 | breakpoint will trap again. | |
1001 | ||
1002 | If we do not do this, then we run the risk that the user will | |
1003 | delete or disable the breakpoint, but the thread will have already | |
1004 | tripped on it. */ | |
1005 | ||
1006 | struct regcache *regcache = get_thread_regcache (ptid); | |
1007 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1008 | CORE_ADDR pc; | |
a80b95ba | 1009 | |
bb00b29d | 1010 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
40625c9d | 1011 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc)) |
bb00b29d TG |
1012 | { |
1013 | inferior_debug (4, "cancel_breakpoint for thread %x\n", | |
1014 | ptid_get_tid (ptid)); | |
1015 | ||
1016 | /* Back up the PC if necessary. */ | |
1017 | if (gdbarch_decr_pc_after_break (gdbarch)) | |
1018 | regcache_write_pc (regcache, pc); | |
1019 | ||
1020 | return 1; | |
a80b95ba | 1021 | } |
bb00b29d TG |
1022 | return 0; |
1023 | } | |
1024 | ||
1025 | static ptid_t | |
1026 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1027 | { | |
1028 | kern_return_t kret; | |
1029 | union | |
1030 | { | |
1031 | mach_msg_header_t hdr; | |
1032 | char data[0x100]; | |
1033 | } msgin; | |
1034 | mach_msg_header_t *hdr = &msgin.hdr; | |
1035 | ptid_t res; | |
1036 | darwin_thread_t *thread; | |
1037 | struct inferior *inf; | |
1038 | ||
1039 | inferior_debug | |
1040 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
1041 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
1042 | ||
1043 | /* Handle fake stop events at first. */ | |
1044 | if (darwin_inf_fake_stop != NULL) | |
1045 | { | |
1046 | inf = darwin_inf_fake_stop; | |
1047 | darwin_inf_fake_stop = NULL; | |
1048 | ||
1049 | status->kind = TARGET_WAITKIND_STOPPED; | |
1050 | status->value.sig = TARGET_SIGNAL_TRAP; | |
1051 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); | |
1052 | thread->msg_state = DARWIN_STOPPED; | |
1053 | return ptid_build (inf->pid, 0, thread->gdb_port); | |
1054 | } | |
1055 | ||
1056 | do | |
1057 | { | |
1058 | /* set_sigint_trap (); */ | |
1059 | ||
1060 | /* Wait for a message. */ | |
1061 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1062 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1063 | ||
1064 | /* clear_sigint_trap (); */ | |
1065 | ||
1066 | if (kret == MACH_RCV_INTERRUPTED) | |
1067 | { | |
1068 | status->kind = TARGET_WAITKIND_IGNORE; | |
1069 | return minus_one_ptid; | |
1070 | } | |
1071 | ||
1072 | if (kret != MACH_MSG_SUCCESS) | |
1073 | { | |
1074 | inferior_debug (5, _("mach_msg: ret=%x\n"), kret); | |
1075 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
1076 | return minus_one_ptid; | |
1077 | } | |
1078 | ||
1079 | /* Debug: display message. */ | |
1080 | if (darwin_debug_flag > 10) | |
1081 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1082 | ||
1083 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
1084 | ||
1085 | if (inf == NULL) | |
1086 | return res; | |
1087 | } | |
1088 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1089 | ||
1090 | /* Stop all tasks. */ | |
1091 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1092 | ||
1093 | /* Read pending messages. */ | |
1094 | while (1) | |
a80b95ba | 1095 | { |
bb00b29d TG |
1096 | struct target_waitstatus status2; |
1097 | ptid_t ptid2; | |
1098 | ||
1099 | kret = mach_msg (&msgin.hdr, | |
1100 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1101 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1102 | ||
1103 | if (kret == MACH_RCV_TIMED_OUT) | |
1104 | break; | |
1105 | if (kret != MACH_MSG_SUCCESS) | |
1106 | { | |
1107 | inferior_debug | |
1108 | (5, _("darwin_wait: mach_msg(pending) ret=%x\n"), kret); | |
1109 | break; | |
1110 | } | |
1111 | ||
1112 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); | |
a80b95ba | 1113 | |
bb00b29d TG |
1114 | if (inf != NULL && thread != NULL |
1115 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1116 | { |
bb00b29d TG |
1117 | if (thread->single_step |
1118 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) | |
1119 | { | |
1120 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1121 | darwin_send_reply (inf, thread); | |
1122 | thread->msg_state = DARWIN_RUNNING; | |
1123 | } | |
1124 | else | |
1125 | inferior_debug | |
1126 | (3, _("darwin_wait: thread %x hit a non-gdb breakpoint\n"), | |
1127 | thread->gdb_port); | |
a80b95ba | 1128 | } |
bb00b29d TG |
1129 | else |
1130 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1131 | } | |
1132 | return res; | |
1133 | } | |
a80b95ba | 1134 | |
bb00b29d TG |
1135 | static ptid_t |
1136 | darwin_wait_to (struct target_ops *ops, | |
1137 | ptid_t ptid, struct target_waitstatus *status, int options) | |
1138 | { | |
1139 | return darwin_wait (ptid, status); | |
1140 | } | |
a80b95ba | 1141 | |
bb00b29d TG |
1142 | static void |
1143 | darwin_stop (ptid_t t) | |
1144 | { | |
1145 | struct inferior *inf = current_inferior (); | |
a80b95ba | 1146 | |
bb00b29d TG |
1147 | /* FIXME: handle in no_ptrace mode. */ |
1148 | gdb_assert (!inf->private->no_ptrace); | |
1149 | kill (inf->pid, SIGINT); | |
a80b95ba TG |
1150 | } |
1151 | ||
1152 | static void | |
1153 | darwin_mourn_inferior (struct target_ops *ops) | |
1154 | { | |
1155 | struct inferior *inf = current_inferior (); | |
1156 | kern_return_t kret; | |
1157 | mach_port_t prev; | |
1158 | int i; | |
1159 | ||
1160 | unpush_target (darwin_ops); | |
1161 | ||
1162 | /* Deallocate threads. */ | |
bb00b29d | 1163 | if (inf->private->threads) |
a80b95ba TG |
1164 | { |
1165 | int k; | |
bb00b29d TG |
1166 | darwin_thread_t *t; |
1167 | for (k = 0; | |
1168 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1169 | k++) | |
a80b95ba | 1170 | { |
bb00b29d | 1171 | kret = mach_port_deallocate (gdb_task, t->gdb_port); |
a80b95ba TG |
1172 | MACH_CHECK_ERROR (kret); |
1173 | } | |
bb00b29d TG |
1174 | VEC_free (darwin_thread_t, inf->private->threads); |
1175 | inf->private->threads = NULL; | |
a80b95ba TG |
1176 | } |
1177 | ||
bb00b29d TG |
1178 | kret = mach_port_move_member (gdb_task, |
1179 | inf->private->notify_port, MACH_PORT_NULL); | |
1180 | gdb_assert (kret == KERN_SUCCESS); | |
1181 | ||
1182 | kret = mach_port_request_notification (gdb_task, inf->private->task, | |
a80b95ba | 1183 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1184 | MACH_PORT_NULL, |
a80b95ba TG |
1185 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1186 | &prev); | |
1187 | /* This can fail if the task is dead. */ | |
bb00b29d TG |
1188 | inferior_debug (4, "task=%x, prev=%x, notify_port=%x\n", |
1189 | inf->private->task, prev, inf->private->notify_port); | |
1190 | ||
a80b95ba TG |
1191 | if (kret == KERN_SUCCESS) |
1192 | { | |
1193 | kret = mach_port_deallocate (gdb_task, prev); | |
1194 | MACH_CHECK_ERROR (kret); | |
1195 | } | |
1196 | ||
bb00b29d TG |
1197 | kret = mach_port_destroy (gdb_task, inf->private->notify_port); |
1198 | MACH_CHECK_ERROR (kret); | |
1199 | ||
1200 | ||
a80b95ba | 1201 | /* Deallocate saved exception ports. */ |
bb00b29d | 1202 | for (i = 0; i < inf->private->exception_info.count; i++) |
a80b95ba TG |
1203 | { |
1204 | kret = mach_port_deallocate | |
bb00b29d | 1205 | (gdb_task, inf->private->exception_info.ports[i]); |
a80b95ba TG |
1206 | MACH_CHECK_ERROR (kret); |
1207 | } | |
bb00b29d | 1208 | inf->private->exception_info.count = 0; |
a80b95ba | 1209 | |
bb00b29d | 1210 | kret = mach_port_deallocate (gdb_task, inf->private->task); |
a80b95ba TG |
1211 | MACH_CHECK_ERROR (kret); |
1212 | ||
bb00b29d TG |
1213 | xfree (inf->private); |
1214 | inf->private = NULL; | |
a80b95ba TG |
1215 | |
1216 | generic_mourn_inferior (); | |
1217 | } | |
1218 | ||
1219 | static void | |
bb00b29d | 1220 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1221 | { |
bb00b29d TG |
1222 | int k; |
1223 | darwin_thread_t *t; | |
a80b95ba | 1224 | |
bb00b29d TG |
1225 | for (k = 0; |
1226 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1227 | k++) | |
1228 | { | |
1229 | if (t->msg_state == DARWIN_MESSAGE) | |
1230 | darwin_resume_thread (inf, t, 0, 0); | |
1231 | } | |
a80b95ba TG |
1232 | } |
1233 | ||
1234 | static void | |
bb00b29d | 1235 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1236 | { |
1237 | struct target_waitstatus wstatus; | |
1238 | ptid_t ptid; | |
1239 | kern_return_t kret; | |
1240 | int status; | |
1241 | int res; | |
1242 | ||
bb00b29d | 1243 | gdb_assert (inf != NULL); |
a80b95ba | 1244 | |
bb00b29d | 1245 | darwin_suspend_inferior (inf); |
a80b95ba | 1246 | |
bb00b29d | 1247 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1248 | |
bb00b29d TG |
1249 | if (inf->private->no_ptrace) |
1250 | return; | |
a80b95ba | 1251 | |
bb00b29d TG |
1252 | res = kill (inf->pid, SIGSTOP); |
1253 | if (res != 0) | |
b37520b6 | 1254 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1255 | |
bb00b29d TG |
1256 | /* Wait until the process is really stopped. */ |
1257 | while (1) | |
a80b95ba | 1258 | { |
bb00b29d TG |
1259 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1260 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
1261 | && wstatus.value.sig == TARGET_SIGNAL_STOP) | |
1262 | break; | |
a80b95ba TG |
1263 | } |
1264 | } | |
1265 | ||
1266 | static kern_return_t | |
1267 | darwin_save_exception_ports (darwin_inferior *inf) | |
1268 | { | |
1269 | kern_return_t kret; | |
1270 | ||
1271 | inf->exception_info.count = | |
1272 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1273 | ||
1274 | kret = task_get_exception_ports | |
1275 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1276 | &inf->exception_info.count, inf->exception_info.ports, | |
1277 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1278 | return kret; | |
1279 | } | |
1280 | ||
1281 | static kern_return_t | |
1282 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1283 | { | |
1284 | int i; | |
1285 | kern_return_t kret; | |
1286 | ||
1287 | for (i = 0; i < inf->exception_info.count; i++) | |
1288 | { | |
1289 | kret = task_set_exception_ports | |
1290 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1291 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1292 | if (kret != KERN_SUCCESS) | |
1293 | return kret; | |
1294 | } | |
1295 | ||
1296 | return KERN_SUCCESS; | |
1297 | } | |
1298 | ||
1299 | static void | |
bb00b29d TG |
1300 | darwin_kill_inferior (struct target_ops *ops) |
1301 | { | |
1302 | struct inferior *inf = current_inferior (); | |
1303 | struct target_waitstatus wstatus; | |
1304 | ptid_t ptid; | |
1305 | kern_return_t kret; | |
1306 | int status; | |
1307 | int res; | |
1308 | ||
1309 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1310 | return; | |
1311 | ||
1312 | gdb_assert (inf != NULL); | |
1313 | ||
1314 | if (!inf->private->no_ptrace) | |
1315 | { | |
1316 | darwin_stop_inferior (inf); | |
1317 | ||
1318 | res = PTRACE (PT_KILL, inf->pid, 0, 0); | |
a7aa0d73 JB |
1319 | if (res != 0) |
1320 | warning (_("Failed to kill inferior: ptrace returned %d " | |
1321 | "[%s] (pid=%d)"), | |
1322 | res, safe_strerror (errno), inf->pid); | |
bb00b29d TG |
1323 | |
1324 | darwin_reply_to_all_pending_messages (inf); | |
1325 | ||
1326 | darwin_resume_inferior (inf); | |
1327 | ||
1328 | ptid = darwin_wait (inferior_ptid, &wstatus); | |
1329 | } | |
1330 | else | |
1331 | { | |
1332 | kret = darwin_restore_exception_ports (inf->private); | |
1333 | MACH_CHECK_ERROR (kret); | |
1334 | ||
1335 | darwin_reply_to_all_pending_messages (inf); | |
1336 | ||
1337 | darwin_resume_inferior (inf); | |
1338 | ||
1339 | res = kill (inf->pid, 9); | |
1340 | ||
1341 | ptid = darwin_wait (inferior_ptid, &wstatus); | |
1342 | } | |
1343 | ||
1344 | target_mourn_inferior (); | |
1345 | } | |
1346 | ||
1347 | static void | |
1348 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1349 | { |
a80b95ba TG |
1350 | kern_return_t kret; |
1351 | mach_port_t prev_port; | |
1352 | int traps_expected; | |
bb00b29d | 1353 | mach_port_t prev_not; |
a80b95ba TG |
1354 | exception_mask_t mask; |
1355 | ||
bb00b29d TG |
1356 | inf->private = XZALLOC (darwin_inferior); |
1357 | ||
1358 | kret = task_for_pid (gdb_task, inf->pid, &inf->private->task); | |
a80b95ba TG |
1359 | if (kret != KERN_SUCCESS) |
1360 | { | |
1361 | int status; | |
a80b95ba TG |
1362 | |
1363 | if (!inf->attach_flag) | |
1364 | { | |
bb00b29d TG |
1365 | kill (inf->pid, 9); |
1366 | waitpid (inf->pid, &status, 0); | |
a80b95ba TG |
1367 | } |
1368 | ||
1369 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
15c19d39 | 1370 | " (please check gdb is codesigned - see taskgated(8))"), |
bb00b29d | 1371 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
a80b95ba TG |
1372 | } |
1373 | ||
bb00b29d TG |
1374 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
1375 | inf->private->task, inf->pid); | |
a80b95ba TG |
1376 | |
1377 | if (darwin_ex_port == MACH_PORT_NULL) | |
1378 | { | |
1379 | /* Create a port to get exceptions. */ | |
1380 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1381 | &darwin_ex_port); | |
1382 | gdb_assert (kret == KERN_SUCCESS); | |
1383 | ||
1384 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, | |
1385 | MACH_MSG_TYPE_MAKE_SEND); | |
1386 | gdb_assert (kret == KERN_SUCCESS); | |
1387 | ||
1388 | /* Create a port set and put ex_port in it. */ | |
1389 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1390 | &darwin_port_set); | |
1391 | gdb_assert (kret == KERN_SUCCESS); | |
1392 | ||
1393 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); | |
1394 | gdb_assert (kret == KERN_SUCCESS); | |
bb00b29d | 1395 | } |
a80b95ba | 1396 | |
bb00b29d TG |
1397 | /* Create a port to be notified when the child task terminates. */ |
1398 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1399 | &inf->private->notify_port); | |
1400 | gdb_assert (kret == KERN_SUCCESS); | |
a80b95ba | 1401 | |
bb00b29d TG |
1402 | kret = mach_port_move_member (gdb_task, |
1403 | inf->private->notify_port, darwin_port_set); | |
1404 | gdb_assert (kret == KERN_SUCCESS); | |
a80b95ba | 1405 | |
bb00b29d | 1406 | kret = mach_port_request_notification (gdb_task, inf->private->task, |
a80b95ba | 1407 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1408 | inf->private->notify_port, |
a80b95ba | 1409 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
bb00b29d | 1410 | &prev_not); |
a80b95ba | 1411 | gdb_assert (kret == KERN_SUCCESS); |
bb00b29d | 1412 | gdb_assert (prev_not == MACH_PORT_NULL); |
a80b95ba | 1413 | |
bb00b29d | 1414 | kret = darwin_save_exception_ports (inf->private); |
a80b95ba TG |
1415 | gdb_assert (kret == KERN_SUCCESS); |
1416 | ||
1417 | /* Set exception port. */ | |
1418 | if (enable_mach_exceptions) | |
1419 | mask = EXC_MASK_ALL; | |
1420 | else | |
bb00b29d TG |
1421 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
1422 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, | |
1423 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); | |
a80b95ba TG |
1424 | gdb_assert (kret == KERN_SUCCESS); |
1425 | ||
1426 | push_target (darwin_ops); | |
1427 | } | |
1428 | ||
1429 | static void | |
bb00b29d | 1430 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1431 | { |
bb00b29d TG |
1432 | darwin_thread_t *thread; |
1433 | ptid_t new_ptid; | |
a80b95ba TG |
1434 | |
1435 | darwin_check_new_threads (inf); | |
1436 | ||
bb00b29d TG |
1437 | gdb_assert (inf->private->threads |
1438 | && VEC_length (darwin_thread_t, inf->private->threads) > 0); | |
1439 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); | |
1440 | ||
1441 | /* Note: fork_inferior automatically add a thead but it uses a wrong ptid. | |
1442 | Fix up. */ | |
1443 | new_ptid = ptid_build (inf->pid, 0, thread->gdb_port); | |
1444 | thread_change_ptid (inferior_ptid, new_ptid); | |
1445 | inferior_ptid = new_ptid; | |
1446 | } | |
1447 | ||
1448 | /* The child must synchronize with gdb: gdb must set the exception port | |
1449 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1450 | FIXME: is there a lighter way ? */ | |
1451 | static int ptrace_fds[2]; | |
1452 | ||
1453 | static void | |
1454 | darwin_ptrace_me (void) | |
1455 | { | |
1456 | int res; | |
1457 | char c; | |
1458 | ||
1459 | /* Close write end point. */ | |
1460 | close (ptrace_fds[1]); | |
1461 | ||
1462 | /* Wait until gdb is ready. */ | |
1463 | res = read (ptrace_fds[0], &c, 1); | |
1464 | gdb_assert (res == 0); | |
1465 | close (ptrace_fds[0]); | |
1466 | ||
1467 | /* Get rid of privileges. */ | |
1468 | setegid (getgid ()); | |
1469 | ||
1470 | /* Set TRACEME. */ | |
1471 | PTRACE (PT_TRACE_ME, 0, 0, 0); | |
1472 | ||
1473 | /* Redirect signals to exception port. */ | |
1474 | PTRACE (PT_SIGEXC, 0, 0, 0); | |
1475 | } | |
1476 | ||
1477 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1478 | static void | |
1479 | darwin_pre_ptrace (void) | |
1480 | { | |
1481 | if (pipe (ptrace_fds) != 0) | |
1482 | { | |
1483 | ptrace_fds[0] = -1; | |
1484 | ptrace_fds[1] = -1; | |
1485 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1486 | } | |
a80b95ba TG |
1487 | } |
1488 | ||
1489 | static void | |
1490 | darwin_ptrace_him (int pid) | |
1491 | { | |
1492 | task_t itask; | |
1493 | kern_return_t kret; | |
1494 | mach_port_t prev_port; | |
1495 | int traps_expected; | |
bb00b29d | 1496 | struct inferior *inf = current_inferior (); |
a80b95ba | 1497 | |
bb00b29d | 1498 | darwin_attach_pid (inf); |
a80b95ba TG |
1499 | |
1500 | /* Let's the child run. */ | |
1501 | close (ptrace_fds[0]); | |
1502 | close (ptrace_fds[1]); | |
1503 | ||
bb00b29d TG |
1504 | darwin_init_thread_list (inf); |
1505 | ||
a80b95ba TG |
1506 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
1507 | } | |
1508 | ||
1509 | static void | |
1510 | darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
1511 | char *allargs, char **env, int from_tty) | |
1512 | { | |
1513 | /* Do the hard work. */ | |
1514 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, darwin_ptrace_him, | |
1515 | darwin_pre_ptrace, NULL); | |
bb00b29d | 1516 | |
a80b95ba TG |
1517 | /* Return now in case of error. */ |
1518 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1519 | return; | |
1520 | } | |
1521 | \f | |
1522 | ||
1523 | /* Attach to process PID, then initialize for debugging it | |
1524 | and wait for the trace-trap that results from attaching. */ | |
1525 | static void | |
1526 | darwin_attach (struct target_ops *ops, char *args, int from_tty) | |
1527 | { | |
1528 | pid_t pid; | |
1529 | pid_t pid2; | |
1530 | int wstatus; | |
1531 | int res; | |
1532 | struct inferior *inf; | |
bb00b29d | 1533 | kern_return_t kret; |
a80b95ba | 1534 | |
74164c56 | 1535 | pid = parse_pid_to_attach (args); |
a80b95ba | 1536 | |
74164c56 | 1537 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1538 | error (_("I refuse to debug myself!")); |
1539 | ||
1540 | if (from_tty) | |
bb00b29d TG |
1541 | { |
1542 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1543 | |
bb00b29d TG |
1544 | if (exec_file) |
1545 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
1546 | target_pid_to_str (pid_to_ptid (pid))); | |
1547 | else | |
1548 | printf_unfiltered (_("Attaching to %s\n"), | |
1549 | target_pid_to_str (pid_to_ptid (pid))); | |
1550 | ||
1551 | gdb_flush (gdb_stdout); | |
1552 | } | |
1553 | ||
1554 | if (pid == 0 || kill (pid, 0) < 0) | |
1555 | error (_("Can't attach to process %d: %s (%d)"), | |
1556 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1557 | |
bb00b29d | 1558 | inferior_ptid = pid_to_ptid (pid); |
6c95b8df PA |
1559 | inf = current_inferior (); |
1560 | inferior_appeared (inf, pid); | |
a80b95ba | 1561 | inf->attach_flag = 1; |
6c95b8df | 1562 | |
bb00b29d TG |
1563 | /* Always add a main thread. */ |
1564 | add_thread_silent (inferior_ptid); | |
a80b95ba | 1565 | |
bb00b29d | 1566 | darwin_attach_pid (inf); |
a80b95ba | 1567 | |
bb00b29d | 1568 | darwin_suspend_inferior (inf); |
a80b95ba | 1569 | |
bb00b29d | 1570 | darwin_init_thread_list (inf); |
a80b95ba | 1571 | |
bb00b29d | 1572 | darwin_check_osabi (inf->private, ptid_get_tid (inferior_ptid)); |
a80b95ba | 1573 | |
bb00b29d TG |
1574 | gdb_assert (darwin_inf_fake_stop == NULL); |
1575 | darwin_inf_fake_stop = inf; | |
1576 | inf->private->no_ptrace = 1; | |
a80b95ba TG |
1577 | } |
1578 | ||
1579 | /* Take a program previously attached to and detaches it. | |
1580 | The program resumes execution and will no longer stop | |
1581 | on signals, etc. We'd better not have left any breakpoints | |
1582 | in the program or it'll die when it hits one. For this | |
1583 | to work, it may be necessary for the process to have been | |
1584 | previously attached. It *might* work if the program was | |
1585 | started via fork. */ | |
1586 | static void | |
1587 | darwin_detach (struct target_ops *ops, char *args, int from_tty) | |
1588 | { | |
bb00b29d TG |
1589 | pid_t pid = ptid_get_pid (inferior_ptid); |
1590 | struct inferior *inf = current_inferior (); | |
a80b95ba TG |
1591 | kern_return_t kret; |
1592 | int res; | |
1593 | ||
bb00b29d | 1594 | /* Display message. */ |
a80b95ba TG |
1595 | if (from_tty) |
1596 | { | |
1597 | char *exec_file = get_exec_file (0); | |
1598 | if (exec_file == 0) | |
1599 | exec_file = ""; | |
bb00b29d TG |
1600 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
1601 | target_pid_to_str (pid_to_ptid (pid))); | |
a80b95ba TG |
1602 | gdb_flush (gdb_stdout); |
1603 | } | |
1604 | ||
bb00b29d TG |
1605 | /* If ptrace() is in use, stop the process. */ |
1606 | if (!inf->private->no_ptrace) | |
1607 | darwin_stop_inferior (inf); | |
a80b95ba | 1608 | |
bb00b29d | 1609 | kret = darwin_restore_exception_ports (inf->private); |
a80b95ba TG |
1610 | MACH_CHECK_ERROR (kret); |
1611 | ||
bb00b29d | 1612 | if (!inf->private->no_ptrace) |
a80b95ba | 1613 | { |
bb00b29d TG |
1614 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1615 | if (res != 0) | |
1616 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1617 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1618 | } |
1619 | ||
bb00b29d | 1620 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1621 | |
5e9bc145 JB |
1622 | /* When using ptrace, we have just performed a PT_DETACH, which |
1623 | resumes the inferior. On the other hand, when we are not using | |
1624 | ptrace, we need to resume its execution ourselves. */ | |
1625 | if (inf->private->no_ptrace) | |
1626 | darwin_resume_inferior (inf); | |
a80b95ba TG |
1627 | |
1628 | darwin_mourn_inferior (ops); | |
1629 | } | |
1630 | ||
1631 | static void | |
1632 | darwin_files_info (struct target_ops *ops) | |
1633 | { | |
a80b95ba TG |
1634 | } |
1635 | ||
1636 | static char * | |
117de6a9 | 1637 | darwin_pid_to_str (struct target_ops *ops, ptid_t ptid) |
a80b95ba | 1638 | { |
bb00b29d TG |
1639 | static char buf[80]; |
1640 | long tid = ptid_get_tid (ptid); | |
1641 | ||
1642 | if (tid != 0) | |
1643 | { | |
1644 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
1645 | tid, ptid_get_pid (ptid)); | |
1646 | return buf; | |
1647 | } | |
a80b95ba | 1648 | |
bb00b29d | 1649 | return normal_pid_to_str (ptid); |
a80b95ba TG |
1650 | } |
1651 | ||
1652 | static int | |
28439f5e | 1653 | darwin_thread_alive (struct target_ops *ops, ptid_t ptid) |
a80b95ba TG |
1654 | { |
1655 | return 1; | |
1656 | } | |
1657 | ||
1658 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
1659 | copy it to RDADDR in gdb's address space. | |
1660 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
1661 | to ADDR in inferior task's address space. | |
1662 | Return 0 on failure; number of bytes read / writen otherwise. */ | |
1663 | static int | |
1664 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
1665 | char *rdaddr, const char *wraddr, int length) | |
1666 | { | |
bb00b29d | 1667 | kern_return_t kret; |
a80b95ba TG |
1668 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
1669 | mach_vm_address_t low_address = (mach_vm_address_t) (addr - offset); | |
1670 | mach_vm_size_t aligned_length = (mach_vm_size_t) PAGE_ROUND (offset + length); | |
1671 | pointer_t copied; | |
1672 | int copy_count; | |
1673 | mach_vm_size_t remaining_length; | |
1674 | mach_vm_address_t region_address; | |
1675 | mach_vm_size_t region_length; | |
1676 | ||
bb00b29d TG |
1677 | inferior_debug (8, _("darwin_read_write_inferior(task=%x, %s, len=%d)\n"), |
1678 | task, core_addr_to_string (addr), length); | |
1679 | ||
0963b4bd | 1680 | /* Get memory from inferior with page aligned addresses. */ |
bb00b29d | 1681 | kret = mach_vm_read (task, low_address, aligned_length, |
a80b95ba | 1682 | &copied, ©_count); |
bb00b29d | 1683 | if (kret != KERN_SUCCESS) |
a80b95ba | 1684 | { |
bb00b29d TG |
1685 | inferior_debug |
1686 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
1687 | core_addr_to_string (addr), mach_error_string (kret)); | |
a80b95ba TG |
1688 | return 0; |
1689 | } | |
1690 | ||
1691 | if (rdaddr != NULL) | |
1692 | memcpy (rdaddr, (char *)copied + offset, length); | |
1693 | ||
1694 | if (wraddr == NULL) | |
1695 | goto out; | |
1696 | ||
1697 | memcpy ((char *)copied + offset, wraddr, length); | |
1698 | ||
1699 | /* Do writes atomically. | |
1700 | First check for holes and unwritable memory. */ | |
1701 | for (region_address = low_address, remaining_length = aligned_length; | |
1702 | region_address < low_address + aligned_length; | |
1703 | region_address += region_length, remaining_length -= region_length) | |
1704 | { | |
bb00b29d TG |
1705 | vm_region_submap_short_info_data_64_t info; |
1706 | mach_vm_address_t region_start = region_address; | |
a80b95ba | 1707 | mach_msg_type_number_t count; |
bb00b29d TG |
1708 | natural_t region_depth; |
1709 | ||
1710 | region_depth = 100000; | |
1711 | count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; | |
1712 | kret = mach_vm_region_recurse | |
1713 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
1714 | (vm_region_recurse_info_t) &info, &count); | |
1715 | ||
1716 | if (kret != KERN_SUCCESS) | |
a80b95ba | 1717 | { |
bb00b29d TG |
1718 | inferior_debug (1, _("darwin_read_write_inferior: " |
1719 | "mach_vm_region_recurse failed at %s: %s\n"), | |
1720 | core_addr_to_string (region_address), | |
1721 | mach_error_string (kret)); | |
a80b95ba TG |
1722 | goto out; |
1723 | } | |
1724 | ||
bb00b29d TG |
1725 | inferior_debug |
1726 | (9, _("darwin_read_write_inferior: " | |
1727 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
1728 | core_addr_to_string (region_address), | |
1729 | core_addr_to_string (region_start), | |
1730 | core_addr_to_string (region_length)); | |
1731 | ||
0963b4bd | 1732 | /* Check for holes in memory. */ |
bb00b29d | 1733 | if (region_start > region_address) |
a80b95ba | 1734 | { |
0963b4bd | 1735 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 1736 | core_addr_to_string (region_address), |
bb00b29d | 1737 | core_addr_to_string (region_start), |
a80b95ba TG |
1738 | (unsigned)region_length); |
1739 | length = 0; | |
1740 | goto out; | |
1741 | } | |
1742 | ||
bb00b29d TG |
1743 | /* Adjust the length. */ |
1744 | region_length -= (region_address - region_start); | |
1745 | ||
a80b95ba TG |
1746 | if (!(info.max_protection & VM_PROT_WRITE)) |
1747 | { | |
bb00b29d TG |
1748 | kret = mach_vm_protect |
1749 | (task, region_address, region_length, | |
1750 | TRUE, info.max_protection | VM_PROT_WRITE | VM_PROT_COPY); | |
1751 | if (kret != KERN_SUCCESS) | |
1752 | { | |
1753 | warning (_("darwin_read_write_inf: " | |
1754 | "mach_vm_protect max failed at %s: %s"), | |
1755 | core_addr_to_string (region_address), | |
1756 | mach_error_string (kret)); | |
1757 | length = 0; | |
1758 | goto out; | |
1759 | } | |
a80b95ba TG |
1760 | } |
1761 | ||
1762 | if (!(info.protection & VM_PROT_WRITE)) | |
1763 | { | |
bb00b29d | 1764 | kret = mach_vm_protect (task, region_address, region_length, |
a80b95ba | 1765 | FALSE, info.protection | VM_PROT_WRITE); |
bb00b29d | 1766 | if (kret != KERN_SUCCESS) |
a80b95ba | 1767 | { |
bb00b29d TG |
1768 | warning (_("darwin_read_write_inf: " |
1769 | "mach_vm_protect failed at %s (len=0x%lx): %s"), | |
1770 | core_addr_to_string (region_address), | |
1771 | (unsigned long)region_length, mach_error_string (kret)); | |
a80b95ba TG |
1772 | length = 0; |
1773 | goto out; | |
1774 | } | |
1775 | } | |
1776 | } | |
1777 | ||
bb00b29d | 1778 | kret = mach_vm_write (task, low_address, copied, aligned_length); |
a80b95ba | 1779 | |
bb00b29d | 1780 | if (kret != KERN_SUCCESS) |
a80b95ba TG |
1781 | { |
1782 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
bb00b29d | 1783 | mach_error_string (kret)); |
a80b95ba TG |
1784 | length = 0; |
1785 | } | |
1786 | out: | |
1787 | mach_vm_deallocate (mach_task_self (), copied, copy_count); | |
1788 | return length; | |
1789 | } | |
1790 | ||
1791 | \f | |
1792 | /* Return 0 on failure, number of bytes handled otherwise. TARGET | |
0963b4bd | 1793 | is ignored. */ |
a80b95ba TG |
1794 | static int |
1795 | darwin_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, | |
1796 | struct mem_attrib *attrib, struct target_ops *target) | |
1797 | { | |
bb00b29d TG |
1798 | struct inferior *inf = current_inferior (); |
1799 | task_t task = inf->private->task; | |
a80b95ba TG |
1800 | |
1801 | if (task == MACH_PORT_NULL) | |
1802 | return 0; | |
1803 | ||
1804 | inferior_debug (8, _("darwin_xfer_memory(%s, %d, %c)\n"), | |
1805 | core_addr_to_string (memaddr), len, write ? 'w' : 'r'); | |
1806 | ||
1807 | if (write) | |
1808 | return darwin_read_write_inferior (task, memaddr, NULL, myaddr, len); | |
1809 | else | |
1810 | return darwin_read_write_inferior (task, memaddr, myaddr, NULL, len); | |
1811 | } | |
1812 | ||
1813 | static LONGEST | |
1814 | darwin_xfer_partial (struct target_ops *ops, | |
1815 | enum target_object object, const char *annex, | |
1816 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
1817 | ULONGEST offset, LONGEST len) | |
1818 | { | |
bb00b29d TG |
1819 | struct inferior *inf = current_inferior (); |
1820 | ||
1821 | inferior_debug | |
854f4b0e TG |
1822 | (8, _("darwin_xfer_partial(%s, %d, rbuf=%s, wbuf=%s) pid=%u\n"), |
1823 | core_addr_to_string (offset), (int)len, | |
1824 | host_address_to_string (readbuf), host_address_to_string (writebuf), | |
1825 | inf->pid); | |
a80b95ba TG |
1826 | |
1827 | if (object != TARGET_OBJECT_MEMORY) | |
1828 | return -1; | |
1829 | ||
bb00b29d | 1830 | return darwin_read_write_inferior (inf->private->task, offset, |
a80b95ba TG |
1831 | readbuf, writebuf, len); |
1832 | } | |
1833 | ||
1834 | static void | |
1835 | set_enable_mach_exceptions (char *args, int from_tty, | |
1836 | struct cmd_list_element *c) | |
1837 | { | |
bb00b29d | 1838 | if (!ptid_equal (inferior_ptid, null_ptid)) |
a80b95ba | 1839 | { |
bb00b29d | 1840 | struct inferior *inf = current_inferior (); |
a80b95ba TG |
1841 | exception_mask_t mask; |
1842 | kern_return_t kret; | |
1843 | ||
1844 | if (enable_mach_exceptions) | |
1845 | mask = EXC_MASK_ALL; | |
1846 | else | |
1847 | { | |
bb00b29d TG |
1848 | darwin_restore_exception_ports (inf->private); |
1849 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
a80b95ba | 1850 | } |
bb00b29d | 1851 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, |
a80b95ba TG |
1852 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
1853 | MACH_CHECK_ERROR (kret); | |
1854 | } | |
1855 | } | |
1856 | ||
bb00b29d TG |
1857 | static char * |
1858 | darwin_pid_to_exec_file (int pid) | |
1859 | { | |
1860 | char *path; | |
1861 | int res; | |
1862 | ||
1863 | path = xmalloc (MAXPATHLEN); | |
1864 | make_cleanup (xfree, path); | |
1865 | ||
1866 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, MAXPATHLEN); | |
1867 | if (res >= 0) | |
1868 | return path; | |
1869 | else | |
1870 | return NULL; | |
1871 | } | |
1872 | ||
1873 | static ptid_t | |
1874 | darwin_get_ada_task_ptid (long lwp, long thread) | |
1875 | { | |
1876 | int i; | |
1877 | darwin_thread_t *t; | |
1878 | int k; | |
1879 | struct inferior *inf = current_inferior (); | |
1880 | kern_return_t kret; | |
1881 | mach_port_name_array_t names; | |
1882 | mach_msg_type_number_t names_count; | |
1883 | mach_port_type_array_t types; | |
1884 | mach_msg_type_number_t types_count; | |
1885 | long res = 0; | |
1886 | ||
1887 | /* First linear search. */ | |
1888 | for (k = 0; | |
1889 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1890 | k++) | |
1891 | if (t->inf_port == lwp) | |
1892 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); | |
1893 | ||
1894 | /* Maybe the port was never extract. Do it now. */ | |
1895 | ||
1896 | /* First get inferior port names. */ | |
1897 | kret = mach_port_names (inf->private->task, &names, &names_count, &types, | |
1898 | &types_count); | |
1899 | MACH_CHECK_ERROR (kret); | |
1900 | if (kret != KERN_SUCCESS) | |
1901 | return null_ptid; | |
1902 | ||
1903 | /* For each name, copy the right in the gdb space and then compare with | |
1904 | our view of the inferior threads. We don't forget to deallocate the | |
1905 | right. */ | |
1906 | for (i = 0; i < names_count; i++) | |
1907 | { | |
1908 | mach_port_t local_name; | |
1909 | mach_msg_type_name_t local_type; | |
1910 | ||
1911 | /* We just need to know the corresponding name in gdb name space. | |
1912 | So extract and deallocate the right. */ | |
1913 | kret = mach_port_extract_right (inf->private->task, names[i], | |
1914 | MACH_MSG_TYPE_COPY_SEND, | |
1915 | &local_name, &local_type); | |
1916 | if (kret != KERN_SUCCESS) | |
1917 | continue; | |
1918 | mach_port_deallocate (gdb_task, local_name); | |
1919 | ||
1920 | for (k = 0; | |
1921 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1922 | k++) | |
1923 | if (t->gdb_port == local_name) | |
1924 | { | |
1925 | t->inf_port = names[i]; | |
1926 | if (names[i] == lwp) | |
1927 | res = t->gdb_port; | |
1928 | } | |
1929 | } | |
1930 | ||
1931 | vm_deallocate (gdb_task, (vm_address_t) names, | |
1932 | names_count * sizeof (mach_port_t)); | |
1933 | ||
1934 | if (res) | |
1935 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); | |
1936 | else | |
1937 | return null_ptid; | |
1938 | } | |
1939 | ||
1940 | static int | |
1941 | darwin_supports_multi_process (void) | |
1942 | { | |
1943 | return 1; | |
1944 | } | |
1945 | ||
a80b95ba | 1946 | void |
bb00b29d | 1947 | _initialize_darwin_inferior (void) |
a80b95ba TG |
1948 | { |
1949 | kern_return_t kret; | |
1950 | ||
a80b95ba TG |
1951 | gdb_task = mach_task_self (); |
1952 | darwin_host_self = mach_host_self (); | |
1953 | ||
1954 | /* Read page size. */ | |
1955 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
1956 | if (kret != KERN_SUCCESS) | |
1957 | { | |
1958 | mach_page_size = 0x1000; | |
1959 | MACH_CHECK_ERROR (kret); | |
1960 | } | |
1961 | ||
a80b95ba TG |
1962 | darwin_ops = inf_child_target (); |
1963 | ||
1964 | darwin_ops->to_shortname = "darwin-child"; | |
1965 | darwin_ops->to_longname = _("Darwin child process"); | |
1966 | darwin_ops->to_doc = | |
1967 | _("Darwin child process (started by the \"run\" command)."); | |
1968 | darwin_ops->to_create_inferior = darwin_create_inferior; | |
1969 | darwin_ops->to_attach = darwin_attach; | |
1970 | darwin_ops->to_attach_no_wait = 0; | |
1971 | darwin_ops->to_detach = darwin_detach; | |
1972 | darwin_ops->to_files_info = darwin_files_info; | |
bb00b29d | 1973 | darwin_ops->to_wait = darwin_wait_to; |
a80b95ba TG |
1974 | darwin_ops->to_mourn_inferior = darwin_mourn_inferior; |
1975 | darwin_ops->to_kill = darwin_kill_inferior; | |
1976 | darwin_ops->to_stop = darwin_stop; | |
bb00b29d | 1977 | darwin_ops->to_resume = darwin_resume_to; |
a80b95ba TG |
1978 | darwin_ops->to_thread_alive = darwin_thread_alive; |
1979 | darwin_ops->to_pid_to_str = darwin_pid_to_str; | |
bb00b29d | 1980 | darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file; |
a80b95ba TG |
1981 | darwin_ops->to_load = NULL; |
1982 | darwin_ops->deprecated_xfer_memory = darwin_xfer_memory; | |
1983 | darwin_ops->to_xfer_partial = darwin_xfer_partial; | |
bb00b29d TG |
1984 | darwin_ops->to_supports_multi_process = darwin_supports_multi_process; |
1985 | darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid; | |
a80b95ba TG |
1986 | |
1987 | darwin_complete_target (darwin_ops); | |
1988 | ||
1989 | add_target (darwin_ops); | |
1990 | ||
1991 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), mach_task_self (), | |
1992 | getpid ()); | |
1993 | ||
1994 | add_setshow_zinteger_cmd ("darwin", class_obscure, | |
1995 | &darwin_debug_flag, _("\ | |
1996 | Set if printing inferior communication debugging statements."), _("\ | |
1997 | Show if printing inferior communication debugging statements."), NULL, | |
1998 | NULL, NULL, | |
1999 | &setdebuglist, &showdebuglist); | |
2000 | ||
2001 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2002 | &enable_mach_exceptions, _("\ | |
2003 | Set if mach exceptions are caught."), _("\ | |
2004 | Show if mach exceptions are caught."), _("\ | |
2005 | When this mode is on, all low level exceptions are reported before being\n\ | |
2006 | reported by the kernel."), | |
2007 | &set_enable_mach_exceptions, NULL, | |
2008 | &setlist, &showlist); | |
2009 | } |