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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
32d0add0 | 2 | Copyright (C) 2008-2015 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 "inf-child.h" |
37 | #include "value.h" | |
38 | #include "arch-utils.h" | |
39 | #include "bfd.h" | |
ece0061f | 40 | #include "bfd/mach-o.h" |
a80b95ba TG |
41 | |
42 | #include <sys/ptrace.h> | |
43 | #include <sys/signal.h> | |
4ac15b59 | 44 | #include <setjmp.h> |
a80b95ba TG |
45 | #include <sys/types.h> |
46 | #include <unistd.h> | |
47 | #include <signal.h> | |
a80b95ba | 48 | #include <ctype.h> |
a80b95ba TG |
49 | #include <sys/sysctl.h> |
50 | #include <sys/proc.h> | |
bb00b29d TG |
51 | #include <libproc.h> |
52 | #include <sys/syscall.h> | |
e69860f1 | 53 | #include <spawn.h> |
a80b95ba TG |
54 | |
55 | #include <mach/mach_error.h> | |
56 | #include <mach/mach_vm.h> | |
57 | #include <mach/mach_init.h> | |
58 | #include <mach/vm_map.h> | |
59 | #include <mach/task.h> | |
60 | #include <mach/mach_port.h> | |
61 | #include <mach/thread_act.h> | |
62 | #include <mach/port.h> | |
63 | ||
64 | #include "darwin-nat.h" | |
21ff4686 | 65 | #include "common/filestuff.h" |
a80b95ba TG |
66 | |
67 | /* Quick overview. | |
68 | Darwin kernel is Mach + BSD derived kernel. Note that they share the | |
69 | same memory space and are linked together (ie there is no micro-kernel). | |
70 | ||
71 | Although ptrace(2) is available on Darwin, it is not complete. We have | |
72 | to use Mach calls to read and write memory and to modify registers. We | |
73 | also use Mach to get inferior faults. As we cannot use select(2) or | |
74 | signals with Mach port (the Mach communication channel), signals are | |
75 | reported to gdb as an exception. Furthermore we detect death of the | |
76 | inferior through a Mach notification message. This way we only wait | |
77 | on Mach ports. | |
78 | ||
79 | Some Mach documentation is available for Apple xnu source package or | |
80 | from the web. */ | |
81 | ||
82 | ||
83 | #define PTRACE(CMD, PID, ADDR, SIG) \ | |
84 | darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG)) | |
85 | ||
1eab8a48 | 86 | static void darwin_stop (struct target_ops *self, ptid_t); |
a80b95ba | 87 | |
bb00b29d | 88 | static void darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, |
2ea28649 | 89 | enum gdb_signal signal); |
bb00b29d | 90 | static void darwin_resume (ptid_t ptid, int step, |
2ea28649 | 91 | enum gdb_signal signal); |
bb00b29d TG |
92 | |
93 | static ptid_t darwin_wait_to (struct target_ops *ops, ptid_t ptid, | |
94 | struct target_waitstatus *status, int options); | |
95 | static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status); | |
96 | ||
a80b95ba TG |
97 | static void darwin_mourn_inferior (struct target_ops *ops); |
98 | ||
2ab1c2d9 | 99 | static void darwin_kill_inferior (struct target_ops *ops); |
a80b95ba TG |
100 | |
101 | static void darwin_ptrace_me (void); | |
102 | ||
103 | static void darwin_ptrace_him (int pid); | |
104 | ||
105 | static void darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
106 | char *allargs, char **env, int from_tty); | |
107 | ||
108 | static void darwin_files_info (struct target_ops *ops); | |
109 | ||
bb00b29d TG |
110 | static char *darwin_pid_to_str (struct target_ops *ops, ptid_t tpid); |
111 | ||
112 | static int darwin_thread_alive (struct target_ops *ops, ptid_t tpid); | |
a80b95ba | 113 | |
a41f2563 TG |
114 | static void darwin_encode_reply (mig_reply_error_t *reply, |
115 | mach_msg_header_t *hdr, integer_t code); | |
116 | ||
a80b95ba TG |
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 | ||
a6290449 | 129 | /* Port set, to wait for answer on all ports. */ |
a80b95ba TG |
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. */ |
ccce17b0 | 146 | static unsigned int darwin_debug_flag = 0; |
a80b95ba | 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 | ||
a6290449 TG |
151 | Once gdb is built, you must codesign it with any system-trusted signing |
152 | authority. See taskgated(8) for details. */ | |
15c19d39 TG |
153 | static const unsigned char info_plist[] |
154 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
155 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
156 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
157 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
158 | "<plist version=\"1.0\">\n" | |
159 | "<dict>\n" | |
160 | " <key>CFBundleIdentifier</key>\n" | |
161 | " <string>org.gnu.gdb</string>\n" | |
162 | " <key>CFBundleName</key>\n" | |
163 | " <string>gdb</string>\n" | |
164 | " <key>CFBundleVersion</key>\n" | |
165 | " <string>1.0</string>\n" | |
166 | " <key>SecTaskAccess</key>\n" | |
167 | " <array>\n" | |
168 | " <string>allowed</string>\n" | |
169 | " <string>debug</string>\n" | |
170 | " </array>\n" | |
171 | "</dict>\n" | |
172 | "</plist>\n"; | |
173 | ||
a80b95ba TG |
174 | static void |
175 | inferior_debug (int level, const char *fmt, ...) | |
176 | { | |
177 | va_list ap; | |
178 | ||
179 | if (darwin_debug_flag < level) | |
180 | return; | |
181 | ||
182 | va_start (ap, fmt); | |
183 | printf_unfiltered (_("[%d inferior]: "), getpid ()); | |
184 | vprintf_unfiltered (fmt, ap); | |
185 | va_end (ap); | |
186 | } | |
187 | ||
188 | void | |
189 | mach_check_error (kern_return_t ret, const char *file, | |
190 | unsigned int line, const char *func) | |
191 | { | |
192 | if (ret == KERN_SUCCESS) | |
193 | return; | |
194 | if (func == NULL) | |
195 | func = _("[UNKNOWN]"); | |
bb00b29d | 196 | |
4f1cdeec | 197 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 198 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
199 | } |
200 | ||
201 | static const char * | |
202 | unparse_exception_type (unsigned int i) | |
203 | { | |
204 | static char unknown_exception_buf[32]; | |
205 | ||
206 | switch (i) | |
207 | { | |
208 | case EXC_BAD_ACCESS: | |
209 | return "EXC_BAD_ACCESS"; | |
210 | case EXC_BAD_INSTRUCTION: | |
211 | return "EXC_BAD_INSTRUCTION"; | |
212 | case EXC_ARITHMETIC: | |
213 | return "EXC_ARITHMETIC"; | |
214 | case EXC_EMULATION: | |
215 | return "EXC_EMULATION"; | |
216 | case EXC_SOFTWARE: | |
217 | return "EXC_SOFTWARE"; | |
218 | case EXC_BREAKPOINT: | |
219 | return "EXC_BREAKPOINT"; | |
220 | case EXC_SYSCALL: | |
221 | return "EXC_SYSCALL"; | |
222 | case EXC_MACH_SYSCALL: | |
223 | return "EXC_MACH_SYSCALL"; | |
224 | case EXC_RPC_ALERT: | |
225 | return "EXC_RPC_ALERT"; | |
226 | case EXC_CRASH: | |
227 | return "EXC_CRASH"; | |
228 | default: | |
229 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
230 | return unknown_exception_buf; | |
231 | } | |
232 | } | |
233 | ||
a7aa0d73 JB |
234 | /* Set errno to zero, and then call ptrace with the given arguments. |
235 | If inferior debugging traces are on, then also print a debug | |
236 | trace. | |
237 | ||
238 | The returned value is the same as the value returned by ptrace, | |
239 | except in the case where that value is -1 but errno is zero. | |
240 | This case is documented to be a non-error situation, so we | |
241 | return zero in that case. */ | |
242 | ||
a80b95ba TG |
243 | static int |
244 | darwin_ptrace (const char *name, | |
245 | int request, int pid, PTRACE_TYPE_ARG3 arg3, int arg4) | |
246 | { | |
247 | int ret; | |
248 | ||
a7aa0d73 | 249 | errno = 0; |
a80b95ba | 250 | ret = ptrace (request, pid, (caddr_t) arg3, arg4); |
a7aa0d73 JB |
251 | if (ret == -1 && errno == 0) |
252 | ret = 0; | |
a80b95ba | 253 | |
bb00b29d | 254 | inferior_debug (4, _("ptrace (%s, %d, 0x%x, %d): %d (%s)\n"), |
a80b95ba | 255 | name, pid, arg3, arg4, ret, |
a3224241 | 256 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
257 | return ret; |
258 | } | |
259 | ||
260 | static int | |
261 | cmp_thread_t (const void *l, const void *r) | |
262 | { | |
bb00b29d TG |
263 | thread_t tl = *(const thread_t *)l; |
264 | thread_t tr = *(const thread_t *)r; | |
265 | return (int)(tl - tr); | |
a80b95ba TG |
266 | } |
267 | ||
268 | static void | |
bb00b29d | 269 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
270 | { |
271 | kern_return_t kret; | |
272 | unsigned int i; | |
273 | thread_array_t thread_list; | |
274 | unsigned int new_nbr; | |
275 | unsigned int old_nbr; | |
276 | unsigned int new_ix, old_ix; | |
bb00b29d TG |
277 | darwin_inferior *darwin_inf = inf->private; |
278 | VEC (darwin_thread_t) *thread_vec; | |
a80b95ba TG |
279 | |
280 | /* Get list of threads. */ | |
bb00b29d | 281 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
282 | MACH_CHECK_ERROR (kret); |
283 | if (kret != KERN_SUCCESS) | |
284 | return; | |
285 | ||
bb00b29d | 286 | /* Sort the list. */ |
a80b95ba TG |
287 | if (new_nbr > 1) |
288 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
289 | ||
bb00b29d TG |
290 | if (darwin_inf->threads) |
291 | old_nbr = VEC_length (darwin_thread_t, darwin_inf->threads); | |
a80b95ba TG |
292 | else |
293 | old_nbr = 0; | |
294 | ||
bb00b29d TG |
295 | /* Quick check for no changes. */ |
296 | if (old_nbr == new_nbr) | |
297 | { | |
298 | for (i = 0; i < new_nbr; i++) | |
299 | if (thread_list[i] | |
300 | != VEC_index (darwin_thread_t, darwin_inf->threads, i)->gdb_port) | |
301 | break; | |
302 | if (i == new_nbr) | |
303 | { | |
15a9128a TG |
304 | /* Deallocate ports. */ |
305 | for (i = 0; i < new_nbr; i++) | |
306 | { | |
307 | kret = mach_port_deallocate (mach_task_self (), thread_list[i]); | |
308 | MACH_CHECK_ERROR (kret); | |
309 | } | |
310 | ||
311 | /* Deallocate the buffer. */ | |
bb00b29d TG |
312 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
313 | new_nbr * sizeof (int)); | |
314 | MACH_CHECK_ERROR (kret); | |
15a9128a | 315 | |
bb00b29d TG |
316 | return; |
317 | } | |
318 | } | |
319 | ||
320 | thread_vec = VEC_alloc (darwin_thread_t, new_nbr); | |
321 | ||
a80b95ba TG |
322 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
323 | { | |
324 | thread_t new_id = (new_ix < new_nbr) ? | |
325 | thread_list[new_ix] : THREAD_NULL; | |
bb00b29d TG |
326 | darwin_thread_t *old = (old_ix < old_nbr) ? |
327 | VEC_index (darwin_thread_t, darwin_inf->threads, old_ix) : NULL; | |
328 | thread_t old_id = old ? old->gdb_port : THREAD_NULL; | |
329 | ||
330 | inferior_debug | |
c8c9911f | 331 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"), |
bb00b29d | 332 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
a80b95ba TG |
333 | |
334 | if (old_id == new_id) | |
335 | { | |
336 | /* Thread still exist. */ | |
bb00b29d | 337 | VEC_safe_push (darwin_thread_t, thread_vec, old); |
a80b95ba TG |
338 | new_ix++; |
339 | old_ix++; | |
340 | ||
15a9128a TG |
341 | /* Deallocate the port. */ |
342 | kret = mach_port_deallocate (gdb_task, new_id); | |
a80b95ba | 343 | MACH_CHECK_ERROR (kret); |
15a9128a | 344 | |
a80b95ba TG |
345 | continue; |
346 | } | |
bb00b29d TG |
347 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
348 | { | |
349 | /* Ignore dead ports. | |
350 | In some weird cases, we might get dead ports. They should | |
351 | correspond to dead thread so they could safely be ignored. */ | |
352 | new_ix++; | |
353 | continue; | |
354 | } | |
355 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
356 | { |
357 | /* A thread was created. */ | |
358 | struct thread_info *tp; | |
bb00b29d | 359 | struct private_thread_info *pti; |
a80b95ba | 360 | |
41bf6aca | 361 | pti = XCNEW (struct private_thread_info); |
bb00b29d TG |
362 | pti->gdb_port = new_id; |
363 | pti->msg_state = DARWIN_RUNNING; | |
364 | ||
365 | /* Add a new thread unless this is the first one ever met. */ | |
366 | if (!(old_nbr == 0 && new_ix == 0)) | |
367 | tp = add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti); | |
368 | else | |
369 | { | |
370 | tp = find_thread_ptid (ptid_build (inf->pid, 0, 0)); | |
371 | gdb_assert (tp); | |
372 | tp->private = pti; | |
373 | } | |
374 | VEC_safe_push (darwin_thread_t, thread_vec, pti); | |
a80b95ba TG |
375 | new_ix++; |
376 | continue; | |
377 | } | |
bb00b29d | 378 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
379 | { |
380 | /* A thread was removed. */ | |
381 | delete_thread (ptid_build (inf->pid, 0, old_id)); | |
382 | kret = mach_port_deallocate (gdb_task, old_id); | |
383 | MACH_CHECK_ERROR (kret); | |
384 | old_ix++; | |
bb00b29d | 385 | continue; |
a80b95ba | 386 | } |
f3574227 | 387 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
388 | } |
389 | ||
bb00b29d TG |
390 | if (darwin_inf->threads) |
391 | VEC_free (darwin_thread_t, darwin_inf->threads); | |
392 | darwin_inf->threads = thread_vec; | |
a80b95ba | 393 | |
15a9128a | 394 | /* Deallocate the buffer. */ |
a80b95ba TG |
395 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
396 | new_nbr * sizeof (int)); | |
397 | MACH_CHECK_ERROR (kret); | |
398 | } | |
399 | ||
bb00b29d TG |
400 | static int |
401 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 402 | { |
bb00b29d TG |
403 | return inf->private->task == *(task_t*)port_ptr; |
404 | } | |
a80b95ba | 405 | |
bb00b29d TG |
406 | static int |
407 | find_inferior_notify_it (struct inferior *inf, void *port_ptr) | |
408 | { | |
409 | return inf->private->notify_port == *(task_t*)port_ptr; | |
a80b95ba TG |
410 | } |
411 | ||
bb00b29d TG |
412 | /* Return an inferior by task port. */ |
413 | static struct inferior * | |
414 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 415 | { |
bb00b29d TG |
416 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
417 | } | |
a80b95ba | 418 | |
bb00b29d TG |
419 | /* Return an inferior by notification port. */ |
420 | static struct inferior * | |
421 | darwin_find_inferior_by_notify (mach_port_t port) | |
422 | { | |
423 | return iterate_over_inferiors (&find_inferior_notify_it, &port); | |
424 | } | |
a80b95ba | 425 | |
bb00b29d TG |
426 | /* Return a thread by port. */ |
427 | static darwin_thread_t * | |
428 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
429 | { | |
430 | darwin_thread_t *t; | |
431 | int k; | |
432 | ||
433 | for (k = 0; | |
434 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
435 | k++) | |
436 | if (t->gdb_port == thread) | |
437 | return t; | |
438 | return NULL; | |
439 | } | |
a80b95ba | 440 | |
bb00b29d | 441 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 442 | |
bb00b29d TG |
443 | static void |
444 | darwin_suspend_inferior (struct inferior *inf) | |
445 | { | |
446 | if (!inf->private->suspended) | |
a80b95ba | 447 | { |
bb00b29d | 448 | kern_return_t kret; |
a80b95ba | 449 | |
bb00b29d TG |
450 | kret = task_suspend (inf->private->task); |
451 | MACH_CHECK_ERROR (kret); | |
a80b95ba | 452 | |
bb00b29d TG |
453 | inf->private->suspended = 1; |
454 | } | |
455 | } | |
a80b95ba | 456 | |
bb00b29d | 457 | /* Resume an inferior at Mach level. */ |
a80b95ba | 458 | |
bb00b29d TG |
459 | static void |
460 | darwin_resume_inferior (struct inferior *inf) | |
461 | { | |
462 | if (inf->private->suspended) | |
463 | { | |
464 | kern_return_t kret; | |
a80b95ba | 465 | |
bb00b29d TG |
466 | kret = task_resume (inf->private->task); |
467 | MACH_CHECK_ERROR (kret); | |
468 | ||
469 | inf->private->suspended = 0; | |
a80b95ba TG |
470 | } |
471 | } | |
472 | ||
bb00b29d TG |
473 | /* Iterator functions. */ |
474 | ||
475 | static int | |
476 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 477 | { |
bb00b29d TG |
478 | darwin_suspend_inferior (inf); |
479 | darwin_check_new_threads (inf); | |
480 | return 0; | |
481 | } | |
482 | ||
483 | static int | |
484 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
485 | { | |
486 | darwin_resume_inferior (inf); | |
487 | return 0; | |
a80b95ba TG |
488 | } |
489 | ||
bb00b29d TG |
490 | static void |
491 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
492 | { | |
493 | printf_unfiltered (_("message header:\n")); | |
494 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
495 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
496 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
497 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
498 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
499 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
500 | ||
501 | if (disp_body) | |
502 | { | |
503 | const unsigned char *data; | |
a6290449 | 504 | const unsigned int *ldata; |
bb00b29d TG |
505 | int size; |
506 | int i; | |
507 | ||
508 | data = (unsigned char *)(hdr + 1); | |
509 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
510 | ||
511 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
512 | { | |
513 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
514 | mach_msg_port_descriptor_t *desc = | |
515 | (mach_msg_port_descriptor_t *)(bod + 1); | |
516 | int k; | |
517 | NDR_record_t *ndr; | |
518 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
519 | bod->msgh_descriptor_count); | |
520 | data += sizeof (mach_msg_body_t); | |
521 | size -= sizeof (mach_msg_body_t); | |
522 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
523 | switch (desc[k].type) | |
524 | { | |
525 | case MACH_MSG_PORT_DESCRIPTOR: | |
526 | printf_unfiltered | |
527 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
528 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
529 | break; | |
530 | default: | |
531 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
532 | k, desc[k].type); | |
533 | break; | |
534 | } | |
535 | data += bod->msgh_descriptor_count | |
536 | * sizeof (mach_msg_port_descriptor_t); | |
537 | size -= bod->msgh_descriptor_count | |
538 | * sizeof (mach_msg_port_descriptor_t); | |
539 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
540 | printf_unfiltered | |
541 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
542 | "int=%02x char=%02x float=%02x\n"), | |
543 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
544 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
545 | data += sizeof (NDR_record_t); | |
546 | size -= sizeof (NDR_record_t); | |
547 | } | |
548 | ||
549 | printf_unfiltered (_(" data:")); | |
a6290449 TG |
550 | ldata = (const unsigned int *)data; |
551 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
552 | printf_unfiltered (" %08x", ldata[i]); | |
bb00b29d TG |
553 | printf_unfiltered (_("\n")); |
554 | } | |
555 | } | |
556 | ||
557 | static int | |
558 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
559 | struct inferior **pinf, | |
560 | darwin_thread_t **pthread) | |
a80b95ba | 561 | { |
bb00b29d TG |
562 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
563 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
564 | NDR_record_t *ndr; | |
565 | integer_t *data; | |
566 | struct inferior *inf; | |
567 | darwin_thread_t *thread; | |
568 | task_t task_port; | |
569 | thread_t thread_port; | |
a80b95ba | 570 | kern_return_t kret; |
bb00b29d | 571 | int i; |
a80b95ba | 572 | |
a41f2563 TG |
573 | /* Check message destination. */ |
574 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
575 | return -1; |
576 | ||
577 | /* Check message header. */ | |
578 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
579 | return -1; | |
580 | ||
581 | /* Check descriptors. */ | |
582 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
583 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
584 | || bod->msgh_descriptor_count != 2 | |
585 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
586 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
587 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
588 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
589 | return -1; | |
590 | ||
591 | /* Check data representation. */ | |
592 | ndr = (NDR_record_t *)(desc + 2); | |
593 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
594 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
595 | || ndr->mig_encoding != NDR_record.mig_encoding | |
596 | || ndr->int_rep != NDR_record.int_rep | |
597 | || ndr->char_rep != NDR_record.char_rep | |
598 | || ndr->float_rep != NDR_record.float_rep) | |
599 | return -1; | |
600 | ||
601 | /* Ok, the hard work. */ | |
602 | data = (integer_t *)(ndr + 1); | |
603 | ||
bb00b29d TG |
604 | task_port = desc[1].name; |
605 | thread_port = desc[0].name; | |
a41f2563 | 606 | |
15a9128a TG |
607 | /* We got new rights to the task, get rid of it. Do not get rid of thread |
608 | right, as we will need it to find the thread. */ | |
a41f2563 TG |
609 | kret = mach_port_deallocate (mach_task_self (), task_port); |
610 | MACH_CHECK_ERROR (kret); | |
a41f2563 TG |
611 | |
612 | /* Find process by port. */ | |
bb00b29d | 613 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 614 | *pinf = inf; |
a41f2563 TG |
615 | if (inf == NULL) |
616 | { | |
617 | /* Not a known inferior. This could happen if the child fork, as | |
618 | the created process will inherit its exception port. | |
619 | FIXME: should the exception port be restored ? */ | |
620 | kern_return_t kret; | |
621 | mig_reply_error_t reply; | |
622 | ||
15a9128a TG |
623 | /* Free thread port (we don't know it). */ |
624 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
625 | MACH_CHECK_ERROR (kret); | |
626 | ||
a41f2563 TG |
627 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); |
628 | ||
629 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
630 | reply.Head.msgh_size, 0, | |
631 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
632 | MACH_PORT_NULL); | |
633 | MACH_CHECK_ERROR (kret); | |
634 | ||
635 | return 0; | |
636 | } | |
bb00b29d TG |
637 | |
638 | /* Find thread by port. */ | |
639 | /* Check for new threads. Do it early so that the port in the exception | |
640 | message can be deallocated. */ | |
641 | darwin_check_new_threads (inf); | |
642 | ||
15a9128a TG |
643 | /* Free the thread port (as gdb knows the thread, it has already has a right |
644 | for it, so this just decrement a reference counter). */ | |
645 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
646 | MACH_CHECK_ERROR (kret); | |
647 | ||
bb00b29d TG |
648 | thread = darwin_find_thread (inf, thread_port); |
649 | if (thread == NULL) | |
650 | return -1; | |
651 | *pthread = thread; | |
652 | ||
a6290449 TG |
653 | /* The thread should be running. However we have observed cases where a |
654 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
655 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
656 | ||
bb00b29d | 657 | /* Finish decoding. */ |
bb00b29d TG |
658 | thread->event.header = *hdr; |
659 | thread->event.thread_port = thread_port; | |
660 | thread->event.task_port = task_port; | |
661 | thread->event.ex_type = data[0]; | |
662 | thread->event.data_count = data[1]; | |
663 | ||
664 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
665 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
666 | + data[1] * sizeof (integer_t))) | |
667 | return -1; | |
668 | for (i = 0; i < data[1]; i++) | |
669 | thread->event.ex_data[i] = data[2 + i]; | |
670 | ||
671 | thread->msg_state = DARWIN_MESSAGE; | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | static void | |
677 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
678 | integer_t code) | |
679 | { | |
680 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
681 | |
682 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 683 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 684 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
685 | rh->msgh_local_port = MACH_PORT_NULL; |
686 | rh->msgh_id = hdr->msgh_id + 100; | |
687 | ||
688 | reply->NDR = NDR_record; | |
689 | reply->RetCode = code; | |
a80b95ba TG |
690 | } |
691 | ||
bb00b29d TG |
692 | static void |
693 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
694 | { |
695 | kern_return_t kret; | |
bb00b29d | 696 | mig_reply_error_t reply; |
a80b95ba | 697 | |
bb00b29d TG |
698 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
699 | ||
700 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
701 | reply.Head.msgh_size, 0, | |
702 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
703 | MACH_PORT_NULL); | |
a80b95ba TG |
704 | MACH_CHECK_ERROR (kret); |
705 | ||
bb00b29d TG |
706 | inf->private->pending_messages--; |
707 | } | |
708 | ||
709 | static void | |
710 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
711 | int step, int nsignal) | |
712 | { | |
713 | kern_return_t kret; | |
714 | int res; | |
715 | ||
a80b95ba | 716 | inferior_debug |
bb00b29d TG |
717 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
718 | thread->msg_state, thread->gdb_port, step, nsignal); | |
719 | ||
720 | switch (thread->msg_state) | |
a80b95ba | 721 | { |
bb00b29d TG |
722 | case DARWIN_MESSAGE: |
723 | if (thread->event.ex_type == EXC_SOFTWARE | |
724 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
725 | { | |
726 | /* Either deliver a new signal or cancel the signal received. */ | |
727 | res = PTRACE (PT_THUPDATE, inf->pid, | |
728 | (void *)(uintptr_t)thread->gdb_port, nsignal); | |
729 | if (res < 0) | |
730 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
731 | } | |
732 | else if (nsignal) | |
733 | { | |
734 | /* Note: ptrace is allowed only if the process is stopped. | |
735 | Directly send the signal to the thread. */ | |
736 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
737 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), | |
738 | thread->gdb_port, nsignal, res); | |
739 | thread->signaled = 1; | |
740 | } | |
741 | ||
d987a266 TG |
742 | /* Set or reset single step. */ |
743 | if (step != thread->single_step) | |
744 | { | |
c8c9911f | 745 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
d987a266 TG |
746 | thread->gdb_port, step); |
747 | darwin_set_sstep (thread->gdb_port, step); | |
748 | thread->single_step = step; | |
749 | } | |
bb00b29d TG |
750 | |
751 | darwin_send_reply (inf, thread); | |
752 | thread->msg_state = DARWIN_RUNNING; | |
753 | break; | |
754 | ||
755 | case DARWIN_RUNNING: | |
756 | break; | |
757 | ||
758 | case DARWIN_STOPPED: | |
759 | kret = thread_resume (thread->gdb_port); | |
760 | MACH_CHECK_ERROR (kret); | |
761 | ||
762 | thread->msg_state = DARWIN_RUNNING; | |
763 | break; | |
a80b95ba | 764 | } |
bb00b29d | 765 | } |
a80b95ba | 766 | |
bb00b29d | 767 | /* Resume all threads of the inferior. */ |
a80b95ba | 768 | |
bb00b29d TG |
769 | static void |
770 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
771 | { | |
772 | darwin_thread_t *thread; | |
773 | int k; | |
774 | ||
775 | for (k = 0; | |
776 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); | |
777 | k++) | |
778 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
779 | } |
780 | ||
bb00b29d | 781 | struct resume_inferior_threads_param |
a80b95ba | 782 | { |
bb00b29d TG |
783 | int step; |
784 | int nsignal; | |
785 | }; | |
786 | ||
787 | static int | |
788 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
789 | { | |
790 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
791 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
792 | ||
793 | darwin_resume_inferior_threads (inf, step, nsignal); | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | /* Suspend all threads of INF. */ | |
799 | ||
800 | static void | |
801 | darwin_suspend_inferior_threads (struct inferior *inf) | |
802 | { | |
803 | darwin_thread_t *thread; | |
a80b95ba | 804 | kern_return_t kret; |
bb00b29d TG |
805 | int k; |
806 | ||
807 | for (k = 0; | |
808 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); | |
809 | k++) | |
810 | switch (thread->msg_state) | |
811 | { | |
812 | case DARWIN_STOPPED: | |
813 | case DARWIN_MESSAGE: | |
814 | break; | |
815 | case DARWIN_RUNNING: | |
816 | kret = thread_suspend (thread->gdb_port); | |
817 | MACH_CHECK_ERROR (kret); | |
818 | thread->msg_state = DARWIN_STOPPED; | |
819 | break; | |
820 | } | |
821 | } | |
a80b95ba | 822 | |
bb00b29d | 823 | static void |
2ea28649 | 824 | darwin_resume (ptid_t ptid, int step, enum gdb_signal signal) |
bb00b29d TG |
825 | { |
826 | struct target_waitstatus status; | |
827 | int pid; | |
a80b95ba | 828 | |
bb00b29d TG |
829 | kern_return_t kret; |
830 | int res; | |
831 | int nsignal; | |
832 | struct inferior *inf; | |
a80b95ba | 833 | |
bb00b29d TG |
834 | inferior_debug |
835 | (2, _("darwin_resume: pid=%d, tid=0x%x, step=%d, signal=%d\n"), | |
836 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); | |
837 | ||
a493e3e2 | 838 | if (signal == GDB_SIGNAL_0) |
bb00b29d TG |
839 | nsignal = 0; |
840 | else | |
2ea28649 | 841 | nsignal = gdb_signal_to_host (signal); |
a80b95ba | 842 | |
bb00b29d TG |
843 | /* Don't try to single step all threads. */ |
844 | if (step) | |
845 | ptid = inferior_ptid; | |
846 | ||
847 | /* minus_one_ptid is RESUME_ALL. */ | |
848 | if (ptid_equal (ptid, minus_one_ptid)) | |
a80b95ba | 849 | { |
bb00b29d TG |
850 | struct resume_inferior_threads_param param; |
851 | ||
852 | param.nsignal = nsignal; | |
853 | param.step = step; | |
a80b95ba | 854 | |
bb00b29d TG |
855 | /* Resume threads. */ |
856 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
857 | /* Resume tasks. */ | |
858 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
859 | } | |
860 | else | |
a80b95ba | 861 | { |
c9657e70 | 862 | struct inferior *inf = find_inferior_ptid (ptid); |
bb00b29d TG |
863 | long tid = ptid_get_tid (ptid); |
864 | ||
865 | /* Stop the inferior (should be useless). */ | |
866 | darwin_suspend_inferior (inf); | |
867 | ||
868 | if (tid == 0) | |
869 | darwin_resume_inferior_threads (inf, step, nsignal); | |
870 | else | |
871 | { | |
872 | darwin_thread_t *thread; | |
873 | ||
874 | /* Suspend threads of the task. */ | |
875 | darwin_suspend_inferior_threads (inf); | |
876 | ||
877 | /* Resume the selected thread. */ | |
878 | thread = darwin_find_thread (inf, tid); | |
879 | gdb_assert (thread); | |
880 | darwin_resume_thread (inf, thread, step, nsignal); | |
881 | } | |
882 | ||
883 | /* Resume the task. */ | |
884 | darwin_resume_inferior (inf); | |
a80b95ba | 885 | } |
bb00b29d | 886 | } |
a80b95ba | 887 | |
bb00b29d TG |
888 | static void |
889 | darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 890 | enum gdb_signal signal) |
bb00b29d TG |
891 | { |
892 | return darwin_resume (ptid, step, signal); | |
893 | } | |
894 | ||
895 | static ptid_t | |
896 | darwin_decode_message (mach_msg_header_t *hdr, | |
897 | darwin_thread_t **pthread, | |
898 | struct inferior **pinf, | |
899 | struct target_waitstatus *status) | |
900 | { | |
901 | darwin_thread_t *thread; | |
902 | struct inferior *inf; | |
a80b95ba | 903 | |
a41f2563 TG |
904 | /* Exception message. 2401 == 0x961 is exc. */ |
905 | if (hdr->msgh_id == 2401) | |
a80b95ba | 906 | { |
bb00b29d TG |
907 | int res; |
908 | ||
909 | /* Decode message. */ | |
910 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
911 | ||
912 | if (res < 0) | |
a80b95ba | 913 | { |
bb00b29d | 914 | /* Should not happen... */ |
c8c9911f JB |
915 | printf_unfiltered |
916 | (_("darwin_wait: ill-formatted message (id=0x%x)\n"), hdr->msgh_id); | |
bb00b29d | 917 | /* FIXME: send a failure reply? */ |
a41f2563 TG |
918 | status->kind = TARGET_WAITKIND_IGNORE; |
919 | return minus_one_ptid; | |
920 | } | |
921 | if (inf == NULL) | |
922 | { | |
923 | status->kind = TARGET_WAITKIND_IGNORE; | |
a80b95ba TG |
924 | return minus_one_ptid; |
925 | } | |
bb00b29d TG |
926 | *pinf = inf; |
927 | *pthread = thread; | |
928 | inf->private->pending_messages++; | |
a80b95ba TG |
929 | |
930 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
931 | thread->msg_state = DARWIN_MESSAGE; |
932 | ||
c8c9911f | 933 | inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"), |
bb00b29d TG |
934 | thread->gdb_port, |
935 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 936 | |
bb00b29d | 937 | switch (thread->event.ex_type) |
a80b95ba TG |
938 | { |
939 | case EXC_BAD_ACCESS: | |
4e225075 | 940 | status->value.sig = GDB_EXC_BAD_ACCESS; |
a80b95ba TG |
941 | break; |
942 | case EXC_BAD_INSTRUCTION: | |
4e225075 | 943 | status->value.sig = GDB_EXC_BAD_INSTRUCTION; |
a80b95ba TG |
944 | break; |
945 | case EXC_ARITHMETIC: | |
4e225075 | 946 | status->value.sig = GDB_EXC_ARITHMETIC; |
a80b95ba TG |
947 | break; |
948 | case EXC_EMULATION: | |
4e225075 | 949 | status->value.sig = GDB_EXC_EMULATION; |
a80b95ba TG |
950 | break; |
951 | case EXC_SOFTWARE: | |
bb00b29d | 952 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 953 | { |
bb00b29d | 954 | status->value.sig = |
2ea28649 | 955 | gdb_signal_from_host (thread->event.ex_data[1]); |
bb00b29d TG |
956 | inferior_debug (5, _(" (signal %d: %s)\n"), |
957 | thread->event.ex_data[1], | |
2ea28649 | 958 | gdb_signal_to_name (status->value.sig)); |
bb00b29d TG |
959 | |
960 | /* If the thread is stopped because it has received a signal | |
961 | that gdb has just sent, continue. */ | |
962 | if (thread->signaled) | |
963 | { | |
964 | thread->signaled = 0; | |
965 | darwin_send_reply (inf, thread); | |
966 | thread->msg_state = DARWIN_RUNNING; | |
967 | status->kind = TARGET_WAITKIND_IGNORE; | |
968 | } | |
a80b95ba TG |
969 | } |
970 | else | |
4e225075 | 971 | status->value.sig = GDB_EXC_SOFTWARE; |
a80b95ba TG |
972 | break; |
973 | case EXC_BREAKPOINT: | |
974 | /* Many internal GDB routines expect breakpoints to be reported | |
4e225075 | 975 | as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT |
0963b4bd | 976 | as a spurious signal. */ |
a493e3e2 | 977 | status->value.sig = GDB_SIGNAL_TRAP; |
a80b95ba TG |
978 | break; |
979 | default: | |
a493e3e2 | 980 | status->value.sig = GDB_SIGNAL_UNKNOWN; |
a80b95ba TG |
981 | break; |
982 | } | |
983 | ||
bb00b29d TG |
984 | return ptid_build (inf->pid, 0, thread->gdb_port); |
985 | } | |
a41f2563 | 986 | else if (hdr->msgh_id == 0x48) |
bb00b29d | 987 | { |
a41f2563 TG |
988 | /* MACH_NOTIFY_DEAD_NAME: notification for exit. */ |
989 | *pinf = NULL; | |
990 | *pthread = NULL; | |
bb00b29d | 991 | |
a41f2563 TG |
992 | inf = darwin_find_inferior_by_notify (hdr->msgh_local_port); |
993 | if (inf != NULL) | |
994 | { | |
995 | if (!inf->private->no_ptrace) | |
bb00b29d | 996 | { |
a41f2563 TG |
997 | pid_t res; |
998 | int wstatus; | |
999 | ||
1000 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
1001 | if (res < 0 || res != inf->pid) | |
1002 | { | |
1003 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
1004 | res, safe_strerror (errno)); | |
1005 | status->kind = TARGET_WAITKIND_IGNORE; | |
1006 | return minus_one_ptid; | |
1007 | } | |
1008 | if (WIFEXITED (wstatus)) | |
1009 | { | |
1010 | status->kind = TARGET_WAITKIND_EXITED; | |
1011 | status->value.integer = WEXITSTATUS (wstatus); | |
1012 | } | |
1013 | else | |
1014 | { | |
1015 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
1016 | status->value.sig = WTERMSIG (wstatus); | |
1017 | } | |
1018 | ||
1019 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"), | |
1020 | res, wstatus); | |
1021 | ||
1022 | /* Looks necessary on Leopard and harmless... */ | |
1023 | wait4 (inf->pid, &wstatus, 0, NULL); | |
1024 | ||
1025 | return ptid_build (inf->pid, 0, 0); | |
bb00b29d TG |
1026 | } |
1027 | else | |
1028 | { | |
a41f2563 TG |
1029 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
1030 | status->kind = TARGET_WAITKIND_EXITED; | |
1031 | status->value.integer = 0; /* Don't know. */ | |
1032 | return ptid_build (inf->pid, 0, 0); | |
bb00b29d | 1033 | } |
bb00b29d TG |
1034 | } |
1035 | } | |
1036 | ||
a41f2563 | 1037 | /* Unknown message. */ |
86ad98c3 | 1038 | warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id); |
a41f2563 | 1039 | status->kind = TARGET_WAITKIND_IGNORE; |
bb00b29d TG |
1040 | return minus_one_ptid; |
1041 | } | |
1042 | ||
1043 | static int | |
1044 | cancel_breakpoint (ptid_t ptid) | |
1045 | { | |
0963b4bd | 1046 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1047 | the current event, eventually we will resume this thread, and this |
1048 | breakpoint will trap again. | |
1049 | ||
1050 | If we do not do this, then we run the risk that the user will | |
1051 | delete or disable the breakpoint, but the thread will have already | |
1052 | tripped on it. */ | |
1053 | ||
1054 | struct regcache *regcache = get_thread_regcache (ptid); | |
1055 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1056 | CORE_ADDR pc; | |
a80b95ba | 1057 | |
118e6252 | 1058 | pc = regcache_read_pc (regcache) - target_decr_pc_after_break (gdbarch); |
40625c9d | 1059 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc)) |
bb00b29d | 1060 | { |
c8c9911f | 1061 | inferior_debug (4, "cancel_breakpoint for thread 0x%x\n", |
bb00b29d TG |
1062 | ptid_get_tid (ptid)); |
1063 | ||
1064 | /* Back up the PC if necessary. */ | |
118e6252 | 1065 | if (target_decr_pc_after_break (gdbarch)) |
bb00b29d TG |
1066 | regcache_write_pc (regcache, pc); |
1067 | ||
1068 | return 1; | |
a80b95ba | 1069 | } |
bb00b29d TG |
1070 | return 0; |
1071 | } | |
1072 | ||
1073 | static ptid_t | |
1074 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1075 | { | |
1076 | kern_return_t kret; | |
1077 | union | |
1078 | { | |
1079 | mach_msg_header_t hdr; | |
1080 | char data[0x100]; | |
1081 | } msgin; | |
1082 | mach_msg_header_t *hdr = &msgin.hdr; | |
1083 | ptid_t res; | |
1084 | darwin_thread_t *thread; | |
1085 | struct inferior *inf; | |
1086 | ||
1087 | inferior_debug | |
1088 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
1089 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
1090 | ||
1091 | /* Handle fake stop events at first. */ | |
1092 | if (darwin_inf_fake_stop != NULL) | |
1093 | { | |
1094 | inf = darwin_inf_fake_stop; | |
1095 | darwin_inf_fake_stop = NULL; | |
1096 | ||
1097 | status->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 1098 | status->value.sig = GDB_SIGNAL_TRAP; |
bb00b29d TG |
1099 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); |
1100 | thread->msg_state = DARWIN_STOPPED; | |
1101 | return ptid_build (inf->pid, 0, thread->gdb_port); | |
1102 | } | |
1103 | ||
1104 | do | |
1105 | { | |
1106 | /* set_sigint_trap (); */ | |
1107 | ||
1108 | /* Wait for a message. */ | |
1109 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1110 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1111 | ||
1112 | /* clear_sigint_trap (); */ | |
1113 | ||
1114 | if (kret == MACH_RCV_INTERRUPTED) | |
1115 | { | |
1116 | status->kind = TARGET_WAITKIND_IGNORE; | |
1117 | return minus_one_ptid; | |
1118 | } | |
1119 | ||
1120 | if (kret != MACH_MSG_SUCCESS) | |
1121 | { | |
c8c9911f | 1122 | inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret); |
bb00b29d TG |
1123 | status->kind = TARGET_WAITKIND_SPURIOUS; |
1124 | return minus_one_ptid; | |
1125 | } | |
1126 | ||
1127 | /* Debug: display message. */ | |
1128 | if (darwin_debug_flag > 10) | |
1129 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1130 | ||
1131 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
a41f2563 TG |
1132 | if (ptid_equal (res, minus_one_ptid)) |
1133 | continue; | |
bb00b29d | 1134 | |
a41f2563 | 1135 | /* Early return in case an inferior has exited. */ |
bb00b29d TG |
1136 | if (inf == NULL) |
1137 | return res; | |
1138 | } | |
1139 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1140 | ||
1141 | /* Stop all tasks. */ | |
1142 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1143 | ||
1144 | /* Read pending messages. */ | |
1145 | while (1) | |
a80b95ba | 1146 | { |
bb00b29d TG |
1147 | struct target_waitstatus status2; |
1148 | ptid_t ptid2; | |
1149 | ||
1150 | kret = mach_msg (&msgin.hdr, | |
1151 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1152 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1153 | ||
1154 | if (kret == MACH_RCV_TIMED_OUT) | |
1155 | break; | |
1156 | if (kret != MACH_MSG_SUCCESS) | |
1157 | { | |
1158 | inferior_debug | |
c8c9911f | 1159 | (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret); |
bb00b29d TG |
1160 | break; |
1161 | } | |
1162 | ||
a41f2563 TG |
1163 | /* Debug: display message. */ |
1164 | if (darwin_debug_flag > 10) | |
1165 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1166 | ||
bb00b29d | 1167 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); |
a80b95ba | 1168 | |
bb00b29d TG |
1169 | if (inf != NULL && thread != NULL |
1170 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1171 | { |
bb00b29d TG |
1172 | if (thread->single_step |
1173 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) | |
1174 | { | |
1175 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1176 | darwin_send_reply (inf, thread); | |
1177 | thread->msg_state = DARWIN_RUNNING; | |
1178 | } | |
1179 | else | |
1180 | inferior_debug | |
c8c9911f | 1181 | (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"), |
bb00b29d | 1182 | thread->gdb_port); |
a80b95ba | 1183 | } |
bb00b29d TG |
1184 | else |
1185 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1186 | } | |
1187 | return res; | |
1188 | } | |
a80b95ba | 1189 | |
bb00b29d | 1190 | static ptid_t |
a6290449 | 1191 | darwin_wait_to (struct target_ops *ops, |
bb00b29d TG |
1192 | ptid_t ptid, struct target_waitstatus *status, int options) |
1193 | { | |
1194 | return darwin_wait (ptid, status); | |
1195 | } | |
a80b95ba | 1196 | |
bb00b29d | 1197 | static void |
1eab8a48 | 1198 | darwin_stop (struct target_ops *self, ptid_t t) |
bb00b29d TG |
1199 | { |
1200 | struct inferior *inf = current_inferior (); | |
a80b95ba | 1201 | |
bb00b29d TG |
1202 | /* FIXME: handle in no_ptrace mode. */ |
1203 | gdb_assert (!inf->private->no_ptrace); | |
1204 | kill (inf->pid, SIGINT); | |
a80b95ba TG |
1205 | } |
1206 | ||
1207 | static void | |
1208 | darwin_mourn_inferior (struct target_ops *ops) | |
1209 | { | |
1210 | struct inferior *inf = current_inferior (); | |
1211 | kern_return_t kret; | |
1212 | mach_port_t prev; | |
1213 | int i; | |
1214 | ||
a80b95ba | 1215 | /* Deallocate threads. */ |
bb00b29d | 1216 | if (inf->private->threads) |
a80b95ba TG |
1217 | { |
1218 | int k; | |
bb00b29d TG |
1219 | darwin_thread_t *t; |
1220 | for (k = 0; | |
1221 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1222 | k++) | |
a80b95ba | 1223 | { |
bb00b29d | 1224 | kret = mach_port_deallocate (gdb_task, t->gdb_port); |
a80b95ba TG |
1225 | MACH_CHECK_ERROR (kret); |
1226 | } | |
bb00b29d TG |
1227 | VEC_free (darwin_thread_t, inf->private->threads); |
1228 | inf->private->threads = NULL; | |
a80b95ba TG |
1229 | } |
1230 | ||
bb00b29d TG |
1231 | kret = mach_port_move_member (gdb_task, |
1232 | inf->private->notify_port, MACH_PORT_NULL); | |
fda184b6 | 1233 | MACH_CHECK_ERROR (kret); |
bb00b29d TG |
1234 | |
1235 | kret = mach_port_request_notification (gdb_task, inf->private->task, | |
a80b95ba | 1236 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1237 | MACH_PORT_NULL, |
a80b95ba TG |
1238 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1239 | &prev); | |
1240 | /* This can fail if the task is dead. */ | |
c8c9911f | 1241 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
bb00b29d TG |
1242 | inf->private->task, prev, inf->private->notify_port); |
1243 | ||
a80b95ba TG |
1244 | if (kret == KERN_SUCCESS) |
1245 | { | |
1246 | kret = mach_port_deallocate (gdb_task, prev); | |
1247 | MACH_CHECK_ERROR (kret); | |
1248 | } | |
1249 | ||
bb00b29d TG |
1250 | kret = mach_port_destroy (gdb_task, inf->private->notify_port); |
1251 | MACH_CHECK_ERROR (kret); | |
1252 | ||
1253 | ||
a80b95ba | 1254 | /* Deallocate saved exception ports. */ |
bb00b29d | 1255 | for (i = 0; i < inf->private->exception_info.count; i++) |
a80b95ba TG |
1256 | { |
1257 | kret = mach_port_deallocate | |
bb00b29d | 1258 | (gdb_task, inf->private->exception_info.ports[i]); |
a80b95ba TG |
1259 | MACH_CHECK_ERROR (kret); |
1260 | } | |
bb00b29d | 1261 | inf->private->exception_info.count = 0; |
a80b95ba | 1262 | |
bb00b29d | 1263 | kret = mach_port_deallocate (gdb_task, inf->private->task); |
a80b95ba TG |
1264 | MACH_CHECK_ERROR (kret); |
1265 | ||
bb00b29d TG |
1266 | xfree (inf->private); |
1267 | inf->private = NULL; | |
a80b95ba | 1268 | |
c1ee2fb3 | 1269 | inf_child_mourn_inferior (ops); |
a80b95ba TG |
1270 | } |
1271 | ||
1272 | static void | |
bb00b29d | 1273 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1274 | { |
bb00b29d TG |
1275 | int k; |
1276 | darwin_thread_t *t; | |
a80b95ba | 1277 | |
bb00b29d TG |
1278 | for (k = 0; |
1279 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1280 | k++) | |
1281 | { | |
1282 | if (t->msg_state == DARWIN_MESSAGE) | |
1283 | darwin_resume_thread (inf, t, 0, 0); | |
1284 | } | |
a80b95ba TG |
1285 | } |
1286 | ||
1287 | static void | |
bb00b29d | 1288 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1289 | { |
1290 | struct target_waitstatus wstatus; | |
1291 | ptid_t ptid; | |
1292 | kern_return_t kret; | |
1293 | int status; | |
1294 | int res; | |
1295 | ||
bb00b29d | 1296 | gdb_assert (inf != NULL); |
a80b95ba | 1297 | |
bb00b29d | 1298 | darwin_suspend_inferior (inf); |
a80b95ba | 1299 | |
bb00b29d | 1300 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1301 | |
bb00b29d TG |
1302 | if (inf->private->no_ptrace) |
1303 | return; | |
a80b95ba | 1304 | |
bb00b29d TG |
1305 | res = kill (inf->pid, SIGSTOP); |
1306 | if (res != 0) | |
b37520b6 | 1307 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1308 | |
bb00b29d TG |
1309 | /* Wait until the process is really stopped. */ |
1310 | while (1) | |
a80b95ba | 1311 | { |
bb00b29d TG |
1312 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1313 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 1314 | && wstatus.value.sig == GDB_SIGNAL_STOP) |
bb00b29d | 1315 | break; |
a80b95ba TG |
1316 | } |
1317 | } | |
1318 | ||
1319 | static kern_return_t | |
1320 | darwin_save_exception_ports (darwin_inferior *inf) | |
1321 | { | |
1322 | kern_return_t kret; | |
1323 | ||
1324 | inf->exception_info.count = | |
1325 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1326 | ||
1327 | kret = task_get_exception_ports | |
1328 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1329 | &inf->exception_info.count, inf->exception_info.ports, | |
1330 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1331 | return kret; | |
1332 | } | |
1333 | ||
1334 | static kern_return_t | |
1335 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1336 | { | |
1337 | int i; | |
1338 | kern_return_t kret; | |
1339 | ||
1340 | for (i = 0; i < inf->exception_info.count; i++) | |
1341 | { | |
1342 | kret = task_set_exception_ports | |
1343 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1344 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1345 | if (kret != KERN_SUCCESS) | |
1346 | return kret; | |
1347 | } | |
1348 | ||
1349 | return KERN_SUCCESS; | |
1350 | } | |
1351 | ||
1352 | static void | |
bb00b29d TG |
1353 | darwin_kill_inferior (struct target_ops *ops) |
1354 | { | |
1355 | struct inferior *inf = current_inferior (); | |
1356 | struct target_waitstatus wstatus; | |
1357 | ptid_t ptid; | |
1358 | kern_return_t kret; | |
1359 | int status; | |
1360 | int res; | |
1361 | ||
1362 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1363 | return; | |
1364 | ||
1365 | gdb_assert (inf != NULL); | |
1366 | ||
ee41036f TG |
1367 | kret = darwin_restore_exception_ports (inf->private); |
1368 | MACH_CHECK_ERROR (kret); | |
bb00b29d | 1369 | |
ee41036f | 1370 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1371 | |
ee41036f | 1372 | res = kill (inf->pid, 9); |
bb00b29d | 1373 | |
ee41036f | 1374 | if (res == 0) |
bb00b29d | 1375 | { |
bb00b29d | 1376 | darwin_resume_inferior (inf); |
a6290449 | 1377 | |
bb00b29d TG |
1378 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1379 | } | |
ee41036f TG |
1380 | else if (errno != ESRCH) |
1381 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1382 | inf->pid, safe_strerror (errno)); | |
bb00b29d TG |
1383 | |
1384 | target_mourn_inferior (); | |
1385 | } | |
1386 | ||
1387 | static void | |
1388 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1389 | { |
a80b95ba TG |
1390 | kern_return_t kret; |
1391 | mach_port_t prev_port; | |
1392 | int traps_expected; | |
bb00b29d | 1393 | mach_port_t prev_not; |
a80b95ba TG |
1394 | exception_mask_t mask; |
1395 | ||
41bf6aca | 1396 | inf->private = XCNEW (darwin_inferior); |
bb00b29d TG |
1397 | |
1398 | kret = task_for_pid (gdb_task, inf->pid, &inf->private->task); | |
a80b95ba TG |
1399 | if (kret != KERN_SUCCESS) |
1400 | { | |
1401 | int status; | |
a80b95ba TG |
1402 | |
1403 | if (!inf->attach_flag) | |
1404 | { | |
bb00b29d TG |
1405 | kill (inf->pid, 9); |
1406 | waitpid (inf->pid, &status, 0); | |
a80b95ba TG |
1407 | } |
1408 | ||
1409 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
15c19d39 | 1410 | " (please check gdb is codesigned - see taskgated(8))"), |
bb00b29d | 1411 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
a80b95ba TG |
1412 | } |
1413 | ||
bb00b29d TG |
1414 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
1415 | inf->private->task, inf->pid); | |
a80b95ba TG |
1416 | |
1417 | if (darwin_ex_port == MACH_PORT_NULL) | |
1418 | { | |
1419 | /* Create a port to get exceptions. */ | |
1420 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1421 | &darwin_ex_port); | |
fda184b6 JB |
1422 | if (kret != KERN_SUCCESS) |
1423 | error (_("Unable to create exception port, mach_port_allocate " | |
1424 | "returned: %d"), | |
1425 | kret); | |
a80b95ba TG |
1426 | |
1427 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, | |
1428 | MACH_MSG_TYPE_MAKE_SEND); | |
fda184b6 JB |
1429 | if (kret != KERN_SUCCESS) |
1430 | error (_("Unable to create exception port, mach_port_insert_right " | |
1431 | "returned: %d"), | |
1432 | kret); | |
a80b95ba TG |
1433 | |
1434 | /* Create a port set and put ex_port in it. */ | |
1435 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1436 | &darwin_port_set); | |
fda184b6 JB |
1437 | if (kret != KERN_SUCCESS) |
1438 | error (_("Unable to create port set, mach_port_allocate " | |
1439 | "returned: %d"), | |
1440 | kret); | |
a80b95ba TG |
1441 | |
1442 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); | |
fda184b6 JB |
1443 | if (kret != KERN_SUCCESS) |
1444 | error (_("Unable to move exception port into new port set, " | |
1445 | "mach_port_move_member\n" | |
1446 | "returned: %d"), | |
1447 | kret); | |
bb00b29d | 1448 | } |
a80b95ba | 1449 | |
bb00b29d TG |
1450 | /* Create a port to be notified when the child task terminates. */ |
1451 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1452 | &inf->private->notify_port); | |
fda184b6 JB |
1453 | if (kret != KERN_SUCCESS) |
1454 | error (_("Unable to create notification port, mach_port_allocate " | |
1455 | "returned: %d"), | |
1456 | kret); | |
a80b95ba | 1457 | |
bb00b29d TG |
1458 | kret = mach_port_move_member (gdb_task, |
1459 | inf->private->notify_port, darwin_port_set); | |
fda184b6 JB |
1460 | if (kret != KERN_SUCCESS) |
1461 | error (_("Unable to move notification port into new port set, " | |
1462 | "mach_port_move_member\n" | |
1463 | "returned: %d"), | |
1464 | kret); | |
a80b95ba | 1465 | |
bb00b29d | 1466 | kret = mach_port_request_notification (gdb_task, inf->private->task, |
a80b95ba | 1467 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1468 | inf->private->notify_port, |
a80b95ba | 1469 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
bb00b29d | 1470 | &prev_not); |
fda184b6 JB |
1471 | if (kret != KERN_SUCCESS) |
1472 | error (_("Termination notification request failed, " | |
1473 | "mach_port_request_notification\n" | |
1474 | "returned: %d"), | |
1475 | kret); | |
1476 | if (prev_not != MACH_PORT_NULL) | |
1477 | { | |
1478 | /* This is unexpected, as there should not be any previously | |
1479 | registered notification request. But this is not a fatal | |
1480 | issue, so just emit a warning. */ | |
1481 | warning (_("\ | |
1482 | A task termination request was registered before the debugger registered\n\ | |
1483 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1484 | impact on the debugging session.")); | |
1485 | } | |
a80b95ba | 1486 | |
bb00b29d | 1487 | kret = darwin_save_exception_ports (inf->private); |
fda184b6 JB |
1488 | if (kret != KERN_SUCCESS) |
1489 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1490 | "returned: %d"), | |
1491 | kret); | |
a80b95ba TG |
1492 | |
1493 | /* Set exception port. */ | |
1494 | if (enable_mach_exceptions) | |
1495 | mask = EXC_MASK_ALL; | |
1496 | else | |
bb00b29d TG |
1497 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
1498 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, | |
1499 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); | |
fda184b6 JB |
1500 | if (kret != KERN_SUCCESS) |
1501 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1502 | "returned: %d"), | |
1503 | kret); | |
a80b95ba | 1504 | |
6a3cb8e8 PA |
1505 | if (!target_is_pushed (darwin_ops)) |
1506 | push_target (darwin_ops); | |
a80b95ba TG |
1507 | } |
1508 | ||
1509 | static void | |
bb00b29d | 1510 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1511 | { |
bb00b29d TG |
1512 | darwin_thread_t *thread; |
1513 | ptid_t new_ptid; | |
a80b95ba TG |
1514 | |
1515 | darwin_check_new_threads (inf); | |
1516 | ||
bb00b29d TG |
1517 | gdb_assert (inf->private->threads |
1518 | && VEC_length (darwin_thread_t, inf->private->threads) > 0); | |
1519 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); | |
1520 | ||
1521 | /* Note: fork_inferior automatically add a thead but it uses a wrong ptid. | |
1522 | Fix up. */ | |
1523 | new_ptid = ptid_build (inf->pid, 0, thread->gdb_port); | |
1524 | thread_change_ptid (inferior_ptid, new_ptid); | |
1525 | inferior_ptid = new_ptid; | |
1526 | } | |
1527 | ||
1528 | /* The child must synchronize with gdb: gdb must set the exception port | |
1529 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1530 | FIXME: is there a lighter way ? */ | |
1531 | static int ptrace_fds[2]; | |
1532 | ||
1533 | static void | |
1534 | darwin_ptrace_me (void) | |
1535 | { | |
1536 | int res; | |
1537 | char c; | |
1538 | ||
1539 | /* Close write end point. */ | |
1540 | close (ptrace_fds[1]); | |
1541 | ||
1542 | /* Wait until gdb is ready. */ | |
1543 | res = read (ptrace_fds[0], &c, 1); | |
fda184b6 JB |
1544 | if (res != 0) |
1545 | error (_("unable to read from pipe, read returned: %d"), res); | |
bb00b29d TG |
1546 | close (ptrace_fds[0]); |
1547 | ||
1548 | /* Get rid of privileges. */ | |
1549 | setegid (getgid ()); | |
1550 | ||
1551 | /* Set TRACEME. */ | |
1552 | PTRACE (PT_TRACE_ME, 0, 0, 0); | |
1553 | ||
1554 | /* Redirect signals to exception port. */ | |
1555 | PTRACE (PT_SIGEXC, 0, 0, 0); | |
1556 | } | |
1557 | ||
1558 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1559 | static void | |
1560 | darwin_pre_ptrace (void) | |
1561 | { | |
1562 | if (pipe (ptrace_fds) != 0) | |
1563 | { | |
1564 | ptrace_fds[0] = -1; | |
1565 | ptrace_fds[1] = -1; | |
1566 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1567 | } | |
21ff4686 TT |
1568 | |
1569 | mark_fd_no_cloexec (ptrace_fds[0]); | |
1570 | mark_fd_no_cloexec (ptrace_fds[1]); | |
a80b95ba TG |
1571 | } |
1572 | ||
1573 | static void | |
1574 | darwin_ptrace_him (int pid) | |
1575 | { | |
1576 | task_t itask; | |
1577 | kern_return_t kret; | |
1578 | mach_port_t prev_port; | |
1579 | int traps_expected; | |
bb00b29d | 1580 | struct inferior *inf = current_inferior (); |
a80b95ba | 1581 | |
bb00b29d | 1582 | darwin_attach_pid (inf); |
a80b95ba TG |
1583 | |
1584 | /* Let's the child run. */ | |
1585 | close (ptrace_fds[0]); | |
1586 | close (ptrace_fds[1]); | |
1587 | ||
21ff4686 TT |
1588 | unmark_fd_no_cloexec (ptrace_fds[0]); |
1589 | unmark_fd_no_cloexec (ptrace_fds[1]); | |
1590 | ||
bb00b29d TG |
1591 | darwin_init_thread_list (inf); |
1592 | ||
a80b95ba TG |
1593 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
1594 | } | |
1595 | ||
e69860f1 TG |
1596 | static void |
1597 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1598 | { | |
1599 | posix_spawnattr_t attr; | |
1600 | short ps_flags = 0; | |
f00c55f8 | 1601 | int res; |
e69860f1 | 1602 | |
f00c55f8 TG |
1603 | res = posix_spawnattr_init (&attr); |
1604 | if (res != 0) | |
e69860f1 TG |
1605 | { |
1606 | fprintf_unfiltered | |
1607 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); | |
1608 | return; | |
1609 | } | |
1610 | ||
1611 | /* Do like execve: replace the image. */ | |
1612 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1613 | ||
1614 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1615 | kernel include files. */ | |
1616 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1617 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1618 | #endif | |
1619 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1620 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1621 | if (res != 0) | |
e69860f1 | 1622 | { |
f00c55f8 | 1623 | fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1624 | return; |
1625 | } | |
1626 | ||
1627 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1628 | } | |
1629 | ||
a80b95ba TG |
1630 | static void |
1631 | darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
1632 | char *allargs, char **env, int from_tty) | |
1633 | { | |
1634 | /* Do the hard work. */ | |
1635 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, darwin_ptrace_him, | |
e69860f1 | 1636 | darwin_pre_ptrace, NULL, darwin_execvp); |
bb00b29d | 1637 | |
a80b95ba TG |
1638 | /* Return now in case of error. */ |
1639 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1640 | return; | |
1641 | } | |
1642 | \f | |
1643 | ||
726ce67c JB |
1644 | /* Set things up such that the next call to darwin_wait will immediately |
1645 | return a fake stop event for inferior INF. | |
1646 | ||
1647 | This assumes that the inferior's thread list has been initialized, | |
1648 | as it will suspend the inferior's first thread. */ | |
1649 | ||
1650 | static void | |
1651 | darwin_setup_fake_stop_event (struct inferior *inf) | |
1652 | { | |
1653 | darwin_thread_t *thread; | |
1654 | kern_return_t kret; | |
1655 | ||
1656 | gdb_assert (darwin_inf_fake_stop == NULL); | |
1657 | darwin_inf_fake_stop = inf; | |
1658 | ||
1659 | /* When detecting a fake pending stop event, darwin_wait returns | |
1660 | an event saying that the first thread is in a DARWIN_STOPPED | |
1661 | state. To make that accurate, we need to suspend that thread | |
1662 | as well. Otherwise, we'll try resuming it when resuming the | |
1663 | inferior, and get a warning because the thread's suspend count | |
1664 | is already zero, making the resume request useless. */ | |
1665 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); | |
1666 | kret = thread_suspend (thread->gdb_port); | |
1667 | MACH_CHECK_ERROR (kret); | |
1668 | } | |
1669 | ||
a80b95ba TG |
1670 | /* Attach to process PID, then initialize for debugging it |
1671 | and wait for the trace-trap that results from attaching. */ | |
1672 | static void | |
c0939df1 | 1673 | darwin_attach (struct target_ops *ops, const char *args, int from_tty) |
a80b95ba TG |
1674 | { |
1675 | pid_t pid; | |
1676 | pid_t pid2; | |
1677 | int wstatus; | |
1678 | int res; | |
1679 | struct inferior *inf; | |
bb00b29d | 1680 | kern_return_t kret; |
a80b95ba | 1681 | |
74164c56 | 1682 | pid = parse_pid_to_attach (args); |
a80b95ba | 1683 | |
74164c56 | 1684 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1685 | error (_("I refuse to debug myself!")); |
1686 | ||
1687 | if (from_tty) | |
bb00b29d TG |
1688 | { |
1689 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1690 | |
bb00b29d TG |
1691 | if (exec_file) |
1692 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
1693 | target_pid_to_str (pid_to_ptid (pid))); | |
1694 | else | |
1695 | printf_unfiltered (_("Attaching to %s\n"), | |
1696 | target_pid_to_str (pid_to_ptid (pid))); | |
1697 | ||
1698 | gdb_flush (gdb_stdout); | |
1699 | } | |
1700 | ||
1701 | if (pid == 0 || kill (pid, 0) < 0) | |
1702 | error (_("Can't attach to process %d: %s (%d)"), | |
1703 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1704 | |
bb00b29d | 1705 | inferior_ptid = pid_to_ptid (pid); |
6c95b8df PA |
1706 | inf = current_inferior (); |
1707 | inferior_appeared (inf, pid); | |
a80b95ba | 1708 | inf->attach_flag = 1; |
6c95b8df | 1709 | |
bb00b29d TG |
1710 | /* Always add a main thread. */ |
1711 | add_thread_silent (inferior_ptid); | |
a80b95ba | 1712 | |
bb00b29d | 1713 | darwin_attach_pid (inf); |
a80b95ba | 1714 | |
bb00b29d | 1715 | darwin_suspend_inferior (inf); |
a80b95ba | 1716 | |
bb00b29d | 1717 | darwin_init_thread_list (inf); |
a80b95ba | 1718 | |
bb00b29d | 1719 | darwin_check_osabi (inf->private, ptid_get_tid (inferior_ptid)); |
a80b95ba | 1720 | |
726ce67c JB |
1721 | darwin_setup_fake_stop_event (inf); |
1722 | ||
bb00b29d | 1723 | inf->private->no_ptrace = 1; |
a80b95ba TG |
1724 | } |
1725 | ||
1726 | /* Take a program previously attached to and detaches it. | |
1727 | The program resumes execution and will no longer stop | |
1728 | on signals, etc. We'd better not have left any breakpoints | |
1729 | in the program or it'll die when it hits one. For this | |
1730 | to work, it may be necessary for the process to have been | |
1731 | previously attached. It *might* work if the program was | |
1732 | started via fork. */ | |
1733 | static void | |
52554a0e | 1734 | darwin_detach (struct target_ops *ops, const char *args, int from_tty) |
a80b95ba | 1735 | { |
bb00b29d TG |
1736 | pid_t pid = ptid_get_pid (inferior_ptid); |
1737 | struct inferior *inf = current_inferior (); | |
a80b95ba TG |
1738 | kern_return_t kret; |
1739 | int res; | |
1740 | ||
bb00b29d | 1741 | /* Display message. */ |
a80b95ba TG |
1742 | if (from_tty) |
1743 | { | |
1744 | char *exec_file = get_exec_file (0); | |
1745 | if (exec_file == 0) | |
1746 | exec_file = ""; | |
bb00b29d TG |
1747 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
1748 | target_pid_to_str (pid_to_ptid (pid))); | |
a80b95ba TG |
1749 | gdb_flush (gdb_stdout); |
1750 | } | |
1751 | ||
bb00b29d TG |
1752 | /* If ptrace() is in use, stop the process. */ |
1753 | if (!inf->private->no_ptrace) | |
1754 | darwin_stop_inferior (inf); | |
a80b95ba | 1755 | |
bb00b29d | 1756 | kret = darwin_restore_exception_ports (inf->private); |
a80b95ba TG |
1757 | MACH_CHECK_ERROR (kret); |
1758 | ||
bb00b29d | 1759 | if (!inf->private->no_ptrace) |
a80b95ba | 1760 | { |
bb00b29d TG |
1761 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1762 | if (res != 0) | |
1763 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1764 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1765 | } |
1766 | ||
bb00b29d | 1767 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1768 | |
5e9bc145 JB |
1769 | /* When using ptrace, we have just performed a PT_DETACH, which |
1770 | resumes the inferior. On the other hand, when we are not using | |
1771 | ptrace, we need to resume its execution ourselves. */ | |
1772 | if (inf->private->no_ptrace) | |
1773 | darwin_resume_inferior (inf); | |
a80b95ba TG |
1774 | |
1775 | darwin_mourn_inferior (ops); | |
1776 | } | |
1777 | ||
1778 | static void | |
1779 | darwin_files_info (struct target_ops *ops) | |
1780 | { | |
a80b95ba TG |
1781 | } |
1782 | ||
1783 | static char * | |
117de6a9 | 1784 | darwin_pid_to_str (struct target_ops *ops, ptid_t ptid) |
a80b95ba | 1785 | { |
bb00b29d TG |
1786 | static char buf[80]; |
1787 | long tid = ptid_get_tid (ptid); | |
1788 | ||
1789 | if (tid != 0) | |
1790 | { | |
1791 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
1792 | tid, ptid_get_pid (ptid)); | |
1793 | return buf; | |
1794 | } | |
a80b95ba | 1795 | |
bb00b29d | 1796 | return normal_pid_to_str (ptid); |
a80b95ba TG |
1797 | } |
1798 | ||
1799 | static int | |
28439f5e | 1800 | darwin_thread_alive (struct target_ops *ops, ptid_t ptid) |
a80b95ba TG |
1801 | { |
1802 | return 1; | |
1803 | } | |
1804 | ||
1805 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
1806 | copy it to RDADDR in gdb's address space. | |
1807 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
1808 | to ADDR in inferior task's address space. | |
f00c55f8 | 1809 | Return 0 on failure; number of bytes read / writen otherwise. */ |
a80b95ba TG |
1810 | static int |
1811 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 1812 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 1813 | ULONGEST length) |
a80b95ba | 1814 | { |
bb00b29d | 1815 | kern_return_t kret; |
a80b95ba TG |
1816 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
1817 | mach_vm_address_t low_address = (mach_vm_address_t) (addr - offset); | |
1818 | mach_vm_size_t aligned_length = (mach_vm_size_t) PAGE_ROUND (offset + length); | |
1819 | pointer_t copied; | |
b9dd1947 | 1820 | mach_msg_type_number_t copy_count; |
a80b95ba TG |
1821 | mach_vm_size_t remaining_length; |
1822 | mach_vm_address_t region_address; | |
1823 | mach_vm_size_t region_length; | |
1824 | ||
b55e14c7 YQ |
1825 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
1826 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 1827 | |
0963b4bd | 1828 | /* Get memory from inferior with page aligned addresses. */ |
bb00b29d | 1829 | kret = mach_vm_read (task, low_address, aligned_length, |
a80b95ba | 1830 | &copied, ©_count); |
bb00b29d | 1831 | if (kret != KERN_SUCCESS) |
a80b95ba | 1832 | { |
bb00b29d TG |
1833 | inferior_debug |
1834 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
1835 | core_addr_to_string (addr), mach_error_string (kret)); | |
a80b95ba TG |
1836 | return 0; |
1837 | } | |
1838 | ||
1839 | if (rdaddr != NULL) | |
1840 | memcpy (rdaddr, (char *)copied + offset, length); | |
1841 | ||
1842 | if (wraddr == NULL) | |
1843 | goto out; | |
1844 | ||
1845 | memcpy ((char *)copied + offset, wraddr, length); | |
1846 | ||
1847 | /* Do writes atomically. | |
1848 | First check for holes and unwritable memory. */ | |
1849 | for (region_address = low_address, remaining_length = aligned_length; | |
1850 | region_address < low_address + aligned_length; | |
1851 | region_address += region_length, remaining_length -= region_length) | |
1852 | { | |
bb00b29d TG |
1853 | vm_region_submap_short_info_data_64_t info; |
1854 | mach_vm_address_t region_start = region_address; | |
a80b95ba | 1855 | mach_msg_type_number_t count; |
bb00b29d TG |
1856 | natural_t region_depth; |
1857 | ||
1858 | region_depth = 100000; | |
1859 | count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; | |
1860 | kret = mach_vm_region_recurse | |
1861 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
1862 | (vm_region_recurse_info_t) &info, &count); | |
1863 | ||
1864 | if (kret != KERN_SUCCESS) | |
a80b95ba | 1865 | { |
bb00b29d TG |
1866 | inferior_debug (1, _("darwin_read_write_inferior: " |
1867 | "mach_vm_region_recurse failed at %s: %s\n"), | |
1868 | core_addr_to_string (region_address), | |
1869 | mach_error_string (kret)); | |
a80b95ba TG |
1870 | goto out; |
1871 | } | |
1872 | ||
bb00b29d TG |
1873 | inferior_debug |
1874 | (9, _("darwin_read_write_inferior: " | |
1875 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
1876 | core_addr_to_string (region_address), | |
1877 | core_addr_to_string (region_start), | |
1878 | core_addr_to_string (region_length)); | |
1879 | ||
0963b4bd | 1880 | /* Check for holes in memory. */ |
bb00b29d | 1881 | if (region_start > region_address) |
a80b95ba | 1882 | { |
0963b4bd | 1883 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 1884 | core_addr_to_string (region_address), |
bb00b29d | 1885 | core_addr_to_string (region_start), |
a80b95ba TG |
1886 | (unsigned)region_length); |
1887 | length = 0; | |
1888 | goto out; | |
1889 | } | |
1890 | ||
bb00b29d TG |
1891 | /* Adjust the length. */ |
1892 | region_length -= (region_address - region_start); | |
1893 | ||
a80b95ba TG |
1894 | if (!(info.max_protection & VM_PROT_WRITE)) |
1895 | { | |
bb00b29d TG |
1896 | kret = mach_vm_protect |
1897 | (task, region_address, region_length, | |
1898 | TRUE, info.max_protection | VM_PROT_WRITE | VM_PROT_COPY); | |
1899 | if (kret != KERN_SUCCESS) | |
1900 | { | |
1901 | warning (_("darwin_read_write_inf: " | |
1902 | "mach_vm_protect max failed at %s: %s"), | |
1903 | core_addr_to_string (region_address), | |
1904 | mach_error_string (kret)); | |
1905 | length = 0; | |
1906 | goto out; | |
1907 | } | |
a80b95ba TG |
1908 | } |
1909 | ||
1910 | if (!(info.protection & VM_PROT_WRITE)) | |
1911 | { | |
bb00b29d | 1912 | kret = mach_vm_protect (task, region_address, region_length, |
a80b95ba | 1913 | FALSE, info.protection | VM_PROT_WRITE); |
bb00b29d | 1914 | if (kret != KERN_SUCCESS) |
a80b95ba | 1915 | { |
bb00b29d TG |
1916 | warning (_("darwin_read_write_inf: " |
1917 | "mach_vm_protect failed at %s (len=0x%lx): %s"), | |
1918 | core_addr_to_string (region_address), | |
1919 | (unsigned long)region_length, mach_error_string (kret)); | |
a80b95ba TG |
1920 | length = 0; |
1921 | goto out; | |
1922 | } | |
1923 | } | |
1924 | } | |
1925 | ||
bb00b29d | 1926 | kret = mach_vm_write (task, low_address, copied, aligned_length); |
a80b95ba | 1927 | |
bb00b29d | 1928 | if (kret != KERN_SUCCESS) |
a80b95ba TG |
1929 | { |
1930 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
bb00b29d | 1931 | mach_error_string (kret)); |
a80b95ba TG |
1932 | length = 0; |
1933 | } | |
1934 | out: | |
1935 | mach_vm_deallocate (mach_task_self (), copied, copy_count); | |
1936 | return length; | |
1937 | } | |
1938 | ||
f00c55f8 TG |
1939 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
1940 | to RDADDR. | |
569283d4 | 1941 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 1942 | |
b967eb24 | 1943 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 1944 | /* This is not available in Darwin 9. */ |
9b409511 | 1945 | static enum target_xfer_status |
b9dd1947 | 1946 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 1947 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
1948 | { |
1949 | struct task_dyld_info task_dyld_info; | |
1950 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
1951 | int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t); | |
1952 | kern_return_t kret; | |
1953 | ||
1954 | if (addr >= sz) | |
9b409511 | 1955 | return TARGET_XFER_EOF; |
f00c55f8 TG |
1956 | |
1957 | kret = task_info (task, TASK_DYLD_INFO, (task_info_t) &task_dyld_info, &count); | |
1958 | MACH_CHECK_ERROR (kret); | |
1959 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 1960 | return TARGET_XFER_E_IO; |
f00c55f8 TG |
1961 | /* Truncate. */ |
1962 | if (addr + length > sz) | |
1963 | length = sz - addr; | |
1964 | memcpy (rdaddr, (char *)&task_dyld_info + addr, length); | |
9b409511 YQ |
1965 | *xfered_len = (ULONGEST) length; |
1966 | return TARGET_XFER_OK; | |
f00c55f8 | 1967 | } |
569283d4 | 1968 | #endif |
f00c55f8 | 1969 | |
a80b95ba | 1970 | \f |
a80b95ba | 1971 | |
1b281443 | 1972 | static enum target_xfer_status |
a80b95ba TG |
1973 | darwin_xfer_partial (struct target_ops *ops, |
1974 | enum target_object object, const char *annex, | |
1975 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1976 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
a80b95ba | 1977 | { |
bb00b29d TG |
1978 | struct inferior *inf = current_inferior (); |
1979 | ||
1980 | inferior_debug | |
b55e14c7 YQ |
1981 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
1982 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
1983 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
1984 | inf->pid); | |
a80b95ba | 1985 | |
f00c55f8 TG |
1986 | switch (object) |
1987 | { | |
1988 | case TARGET_OBJECT_MEMORY: | |
9b409511 YQ |
1989 | { |
1990 | int l = darwin_read_write_inferior (inf->private->task, offset, | |
1991 | readbuf, writebuf, len); | |
1992 | ||
1993 | if (l == 0) | |
1994 | return TARGET_XFER_EOF; | |
1995 | else | |
1996 | { | |
1997 | gdb_assert (l > 0); | |
1998 | *xfered_len = (ULONGEST) l; | |
1999 | return TARGET_XFER_OK; | |
2000 | } | |
2001 | } | |
569283d4 | 2002 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
2003 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
2004 | if (writebuf != NULL || readbuf == NULL) | |
2005 | { | |
2006 | /* Support only read. */ | |
2ed4b548 | 2007 | return TARGET_XFER_E_IO; |
f00c55f8 | 2008 | } |
9b409511 YQ |
2009 | return darwin_read_dyld_info (inf->private->task, offset, readbuf, len, |
2010 | xfered_len); | |
569283d4 | 2011 | #endif |
f00c55f8 | 2012 | default: |
2ed4b548 | 2013 | return TARGET_XFER_E_IO; |
f00c55f8 | 2014 | } |
a80b95ba | 2015 | |
a80b95ba TG |
2016 | } |
2017 | ||
2018 | static void | |
2019 | set_enable_mach_exceptions (char *args, int from_tty, | |
2020 | struct cmd_list_element *c) | |
2021 | { | |
bb00b29d | 2022 | if (!ptid_equal (inferior_ptid, null_ptid)) |
a80b95ba | 2023 | { |
bb00b29d | 2024 | struct inferior *inf = current_inferior (); |
a80b95ba TG |
2025 | exception_mask_t mask; |
2026 | kern_return_t kret; | |
2027 | ||
2028 | if (enable_mach_exceptions) | |
2029 | mask = EXC_MASK_ALL; | |
2030 | else | |
2031 | { | |
bb00b29d TG |
2032 | darwin_restore_exception_ports (inf->private); |
2033 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
a80b95ba | 2034 | } |
bb00b29d | 2035 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, |
a80b95ba TG |
2036 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2037 | MACH_CHECK_ERROR (kret); | |
2038 | } | |
2039 | } | |
2040 | ||
bb00b29d | 2041 | static char * |
8dd27370 | 2042 | darwin_pid_to_exec_file (struct target_ops *self, int pid) |
bb00b29d | 2043 | { |
b4ab256d | 2044 | static char path[PATH_MAX]; |
bb00b29d TG |
2045 | int res; |
2046 | ||
d8d2a3ee | 2047 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2048 | if (res >= 0) |
2049 | return path; | |
2050 | else | |
2051 | return NULL; | |
2052 | } | |
2053 | ||
2054 | static ptid_t | |
1e6b91a4 | 2055 | darwin_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) |
bb00b29d TG |
2056 | { |
2057 | int i; | |
2058 | darwin_thread_t *t; | |
2059 | int k; | |
2060 | struct inferior *inf = current_inferior (); | |
2061 | kern_return_t kret; | |
2062 | mach_port_name_array_t names; | |
2063 | mach_msg_type_number_t names_count; | |
2064 | mach_port_type_array_t types; | |
2065 | mach_msg_type_number_t types_count; | |
2066 | long res = 0; | |
2067 | ||
2068 | /* First linear search. */ | |
2069 | for (k = 0; | |
2070 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
2071 | k++) | |
2072 | if (t->inf_port == lwp) | |
2073 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); | |
2074 | ||
2075 | /* Maybe the port was never extract. Do it now. */ | |
2076 | ||
2077 | /* First get inferior port names. */ | |
2078 | kret = mach_port_names (inf->private->task, &names, &names_count, &types, | |
2079 | &types_count); | |
2080 | MACH_CHECK_ERROR (kret); | |
2081 | if (kret != KERN_SUCCESS) | |
2082 | return null_ptid; | |
2083 | ||
2084 | /* For each name, copy the right in the gdb space and then compare with | |
2085 | our view of the inferior threads. We don't forget to deallocate the | |
2086 | right. */ | |
2087 | for (i = 0; i < names_count; i++) | |
2088 | { | |
2089 | mach_port_t local_name; | |
2090 | mach_msg_type_name_t local_type; | |
2091 | ||
2092 | /* We just need to know the corresponding name in gdb name space. | |
2093 | So extract and deallocate the right. */ | |
2094 | kret = mach_port_extract_right (inf->private->task, names[i], | |
2095 | MACH_MSG_TYPE_COPY_SEND, | |
2096 | &local_name, &local_type); | |
2097 | if (kret != KERN_SUCCESS) | |
2098 | continue; | |
2099 | mach_port_deallocate (gdb_task, local_name); | |
2100 | ||
2101 | for (k = 0; | |
2102 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
2103 | k++) | |
2104 | if (t->gdb_port == local_name) | |
2105 | { | |
2106 | t->inf_port = names[i]; | |
2107 | if (names[i] == lwp) | |
2108 | res = t->gdb_port; | |
2109 | } | |
2110 | } | |
2111 | ||
2112 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2113 | names_count * sizeof (mach_port_t)); | |
2114 | ||
2115 | if (res) | |
2116 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); | |
2117 | else | |
2118 | return null_ptid; | |
2119 | } | |
2120 | ||
2121 | static int | |
86ce2668 | 2122 | darwin_supports_multi_process (struct target_ops *self) |
bb00b29d TG |
2123 | { |
2124 | return 1; | |
2125 | } | |
2126 | ||
c381a3f6 JB |
2127 | /* -Wmissing-prototypes */ |
2128 | extern initialize_file_ftype _initialize_darwin_inferior; | |
2129 | ||
a80b95ba | 2130 | void |
bb00b29d | 2131 | _initialize_darwin_inferior (void) |
a80b95ba TG |
2132 | { |
2133 | kern_return_t kret; | |
2134 | ||
a80b95ba TG |
2135 | gdb_task = mach_task_self (); |
2136 | darwin_host_self = mach_host_self (); | |
2137 | ||
2138 | /* Read page size. */ | |
2139 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2140 | if (kret != KERN_SUCCESS) | |
2141 | { | |
2142 | mach_page_size = 0x1000; | |
2143 | MACH_CHECK_ERROR (kret); | |
2144 | } | |
2145 | ||
a80b95ba TG |
2146 | darwin_ops = inf_child_target (); |
2147 | ||
a80b95ba TG |
2148 | darwin_ops->to_create_inferior = darwin_create_inferior; |
2149 | darwin_ops->to_attach = darwin_attach; | |
2150 | darwin_ops->to_attach_no_wait = 0; | |
2151 | darwin_ops->to_detach = darwin_detach; | |
2152 | darwin_ops->to_files_info = darwin_files_info; | |
bb00b29d | 2153 | darwin_ops->to_wait = darwin_wait_to; |
a80b95ba TG |
2154 | darwin_ops->to_mourn_inferior = darwin_mourn_inferior; |
2155 | darwin_ops->to_kill = darwin_kill_inferior; | |
2156 | darwin_ops->to_stop = darwin_stop; | |
bb00b29d | 2157 | darwin_ops->to_resume = darwin_resume_to; |
a80b95ba TG |
2158 | darwin_ops->to_thread_alive = darwin_thread_alive; |
2159 | darwin_ops->to_pid_to_str = darwin_pid_to_str; | |
bb00b29d | 2160 | darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file; |
a80b95ba | 2161 | darwin_ops->to_load = NULL; |
a80b95ba | 2162 | darwin_ops->to_xfer_partial = darwin_xfer_partial; |
bb00b29d TG |
2163 | darwin_ops->to_supports_multi_process = darwin_supports_multi_process; |
2164 | darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid; | |
a80b95ba TG |
2165 | |
2166 | darwin_complete_target (darwin_ops); | |
2167 | ||
2168 | add_target (darwin_ops); | |
2169 | ||
2170 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), mach_task_self (), | |
2171 | getpid ()); | |
2172 | ||
ccce17b0 YQ |
2173 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2174 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2175 | Set if printing inferior communication debugging statements."), _("\ |
2176 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2177 | NULL, NULL, |
2178 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2179 | |
2180 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2181 | &enable_mach_exceptions, _("\ | |
2182 | Set if mach exceptions are caught."), _("\ | |
2183 | Show if mach exceptions are caught."), _("\ | |
2184 | When this mode is on, all low level exceptions are reported before being\n\ | |
2185 | reported by the kernel."), | |
2186 | &set_enable_mach_exceptions, NULL, | |
2187 | &setlist, &showlist); | |
2188 | } |