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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
0fb0cc75 | 2 | Copyright (C) 2008, 2009 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 | ||
102 | static int darwin_lookup_task (char *args, task_t * ptask, int *ppid); | |
103 | ||
2ab1c2d9 | 104 | static void darwin_kill_inferior (struct target_ops *ops); |
a80b95ba TG |
105 | |
106 | static void darwin_ptrace_me (void); | |
107 | ||
108 | static void darwin_ptrace_him (int pid); | |
109 | ||
110 | static void darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
111 | char *allargs, char **env, int from_tty); | |
112 | ||
113 | static void darwin_files_info (struct target_ops *ops); | |
114 | ||
bb00b29d TG |
115 | static char *darwin_pid_to_str (struct target_ops *ops, ptid_t tpid); |
116 | ||
117 | static int darwin_thread_alive (struct target_ops *ops, ptid_t tpid); | |
a80b95ba TG |
118 | |
119 | /* Target operations for Darwin. */ | |
120 | static struct target_ops *darwin_ops; | |
121 | ||
122 | /* Task identifier of gdb. */ | |
123 | static task_t gdb_task; | |
124 | ||
125 | /* A copy of mach_host_self (). */ | |
126 | mach_port_t darwin_host_self; | |
127 | ||
128 | /* Exception port. */ | |
129 | mach_port_t darwin_ex_port; | |
130 | ||
a80b95ba TG |
131 | /* Port set. */ |
132 | mach_port_t darwin_port_set; | |
133 | ||
134 | /* Page size. */ | |
135 | static vm_size_t mach_page_size; | |
136 | ||
137 | /* If Set, catch all mach exceptions (before they are converted to signals | |
138 | by the kernel). */ | |
139 | static int enable_mach_exceptions; | |
140 | ||
bb00b29d TG |
141 | /* Inferior that should report a fake stop event. */ |
142 | static struct inferior *darwin_inf_fake_stop; | |
143 | ||
a80b95ba TG |
144 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
145 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
146 | ||
bb00b29d | 147 | /* This controls output of inferior debugging. */ |
a80b95ba TG |
148 | static int darwin_debug_flag = 0; |
149 | ||
150 | static void | |
151 | inferior_debug (int level, const char *fmt, ...) | |
152 | { | |
153 | va_list ap; | |
154 | ||
155 | if (darwin_debug_flag < level) | |
156 | return; | |
157 | ||
158 | va_start (ap, fmt); | |
159 | printf_unfiltered (_("[%d inferior]: "), getpid ()); | |
160 | vprintf_unfiltered (fmt, ap); | |
161 | va_end (ap); | |
162 | } | |
163 | ||
164 | void | |
165 | mach_check_error (kern_return_t ret, const char *file, | |
166 | unsigned int line, const char *func) | |
167 | { | |
168 | if (ret == KERN_SUCCESS) | |
169 | return; | |
170 | if (func == NULL) | |
171 | func = _("[UNKNOWN]"); | |
bb00b29d TG |
172 | |
173 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)\n"), | |
174 | file, line, func, mach_error_string (ret), (unsigned long) ret); | |
a80b95ba TG |
175 | } |
176 | ||
177 | static const char * | |
178 | unparse_exception_type (unsigned int i) | |
179 | { | |
180 | static char unknown_exception_buf[32]; | |
181 | ||
182 | switch (i) | |
183 | { | |
184 | case EXC_BAD_ACCESS: | |
185 | return "EXC_BAD_ACCESS"; | |
186 | case EXC_BAD_INSTRUCTION: | |
187 | return "EXC_BAD_INSTRUCTION"; | |
188 | case EXC_ARITHMETIC: | |
189 | return "EXC_ARITHMETIC"; | |
190 | case EXC_EMULATION: | |
191 | return "EXC_EMULATION"; | |
192 | case EXC_SOFTWARE: | |
193 | return "EXC_SOFTWARE"; | |
194 | case EXC_BREAKPOINT: | |
195 | return "EXC_BREAKPOINT"; | |
196 | case EXC_SYSCALL: | |
197 | return "EXC_SYSCALL"; | |
198 | case EXC_MACH_SYSCALL: | |
199 | return "EXC_MACH_SYSCALL"; | |
200 | case EXC_RPC_ALERT: | |
201 | return "EXC_RPC_ALERT"; | |
202 | case EXC_CRASH: | |
203 | return "EXC_CRASH"; | |
204 | default: | |
205 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
206 | return unknown_exception_buf; | |
207 | } | |
208 | } | |
209 | ||
210 | static int | |
211 | darwin_ptrace (const char *name, | |
212 | int request, int pid, PTRACE_TYPE_ARG3 arg3, int arg4) | |
213 | { | |
214 | int ret; | |
215 | ||
216 | ret = ptrace (request, pid, (caddr_t) arg3, arg4); | |
217 | ||
bb00b29d | 218 | inferior_debug (4, _("ptrace (%s, %d, 0x%x, %d): %d (%s)\n"), |
a80b95ba | 219 | name, pid, arg3, arg4, ret, |
a3224241 | 220 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
221 | return ret; |
222 | } | |
223 | ||
224 | static int | |
225 | cmp_thread_t (const void *l, const void *r) | |
226 | { | |
bb00b29d TG |
227 | thread_t tl = *(const thread_t *)l; |
228 | thread_t tr = *(const thread_t *)r; | |
229 | return (int)(tl - tr); | |
a80b95ba TG |
230 | } |
231 | ||
232 | static void | |
bb00b29d | 233 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
234 | { |
235 | kern_return_t kret; | |
236 | unsigned int i; | |
237 | thread_array_t thread_list; | |
238 | unsigned int new_nbr; | |
239 | unsigned int old_nbr; | |
240 | unsigned int new_ix, old_ix; | |
bb00b29d TG |
241 | darwin_inferior *darwin_inf = inf->private; |
242 | VEC (darwin_thread_t) *thread_vec; | |
a80b95ba TG |
243 | |
244 | /* Get list of threads. */ | |
bb00b29d | 245 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
246 | MACH_CHECK_ERROR (kret); |
247 | if (kret != KERN_SUCCESS) | |
248 | return; | |
249 | ||
bb00b29d | 250 | /* Sort the list. */ |
a80b95ba TG |
251 | if (new_nbr > 1) |
252 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
253 | ||
bb00b29d TG |
254 | if (darwin_inf->threads) |
255 | old_nbr = VEC_length (darwin_thread_t, darwin_inf->threads); | |
a80b95ba TG |
256 | else |
257 | old_nbr = 0; | |
258 | ||
bb00b29d TG |
259 | /* Quick check for no changes. */ |
260 | if (old_nbr == new_nbr) | |
261 | { | |
262 | for (i = 0; i < new_nbr; i++) | |
263 | if (thread_list[i] | |
264 | != VEC_index (darwin_thread_t, darwin_inf->threads, i)->gdb_port) | |
265 | break; | |
266 | if (i == new_nbr) | |
267 | { | |
268 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, | |
269 | new_nbr * sizeof (int)); | |
270 | MACH_CHECK_ERROR (kret); | |
271 | return; | |
272 | } | |
273 | } | |
274 | ||
275 | thread_vec = VEC_alloc (darwin_thread_t, new_nbr); | |
276 | ||
a80b95ba TG |
277 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
278 | { | |
279 | thread_t new_id = (new_ix < new_nbr) ? | |
280 | thread_list[new_ix] : THREAD_NULL; | |
bb00b29d TG |
281 | darwin_thread_t *old = (old_ix < old_nbr) ? |
282 | VEC_index (darwin_thread_t, darwin_inf->threads, old_ix) : NULL; | |
283 | thread_t old_id = old ? old->gdb_port : THREAD_NULL; | |
284 | ||
285 | inferior_debug | |
286 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:%x old_id:%x\n"), | |
287 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); | |
a80b95ba TG |
288 | |
289 | if (old_id == new_id) | |
290 | { | |
291 | /* Thread still exist. */ | |
bb00b29d | 292 | VEC_safe_push (darwin_thread_t, thread_vec, old); |
a80b95ba TG |
293 | new_ix++; |
294 | old_ix++; | |
295 | ||
296 | kret = mach_port_deallocate (gdb_task, old_id); | |
297 | MACH_CHECK_ERROR (kret); | |
298 | continue; | |
299 | } | |
bb00b29d TG |
300 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
301 | { | |
302 | /* Ignore dead ports. | |
303 | In some weird cases, we might get dead ports. They should | |
304 | correspond to dead thread so they could safely be ignored. */ | |
305 | new_ix++; | |
306 | continue; | |
307 | } | |
308 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
309 | { |
310 | /* A thread was created. */ | |
311 | struct thread_info *tp; | |
bb00b29d | 312 | struct private_thread_info *pti; |
a80b95ba | 313 | |
bb00b29d TG |
314 | pti = XZALLOC (struct private_thread_info); |
315 | pti->gdb_port = new_id; | |
316 | pti->msg_state = DARWIN_RUNNING; | |
317 | ||
318 | /* Add a new thread unless this is the first one ever met. */ | |
319 | if (!(old_nbr == 0 && new_ix == 0)) | |
320 | tp = add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti); | |
321 | else | |
322 | { | |
323 | tp = find_thread_ptid (ptid_build (inf->pid, 0, 0)); | |
324 | gdb_assert (tp); | |
325 | tp->private = pti; | |
326 | } | |
327 | VEC_safe_push (darwin_thread_t, thread_vec, pti); | |
a80b95ba TG |
328 | new_ix++; |
329 | continue; | |
330 | } | |
bb00b29d | 331 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
332 | { |
333 | /* A thread was removed. */ | |
334 | delete_thread (ptid_build (inf->pid, 0, old_id)); | |
335 | kret = mach_port_deallocate (gdb_task, old_id); | |
336 | MACH_CHECK_ERROR (kret); | |
337 | old_ix++; | |
bb00b29d | 338 | continue; |
a80b95ba | 339 | } |
bb00b29d | 340 | gdb_assert (0); |
a80b95ba TG |
341 | } |
342 | ||
bb00b29d TG |
343 | if (darwin_inf->threads) |
344 | VEC_free (darwin_thread_t, darwin_inf->threads); | |
345 | darwin_inf->threads = thread_vec; | |
a80b95ba TG |
346 | |
347 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, | |
348 | new_nbr * sizeof (int)); | |
349 | MACH_CHECK_ERROR (kret); | |
350 | } | |
351 | ||
bb00b29d TG |
352 | static int |
353 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 354 | { |
bb00b29d TG |
355 | return inf->private->task == *(task_t*)port_ptr; |
356 | } | |
a80b95ba | 357 | |
bb00b29d TG |
358 | static int |
359 | find_inferior_notify_it (struct inferior *inf, void *port_ptr) | |
360 | { | |
361 | return inf->private->notify_port == *(task_t*)port_ptr; | |
a80b95ba TG |
362 | } |
363 | ||
bb00b29d TG |
364 | /* Return an inferior by task port. */ |
365 | static struct inferior * | |
366 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 367 | { |
bb00b29d TG |
368 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
369 | } | |
a80b95ba | 370 | |
bb00b29d TG |
371 | /* Return an inferior by notification port. */ |
372 | static struct inferior * | |
373 | darwin_find_inferior_by_notify (mach_port_t port) | |
374 | { | |
375 | return iterate_over_inferiors (&find_inferior_notify_it, &port); | |
376 | } | |
a80b95ba | 377 | |
bb00b29d TG |
378 | /* Return a thread by port. */ |
379 | static darwin_thread_t * | |
380 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
381 | { | |
382 | darwin_thread_t *t; | |
383 | int k; | |
384 | ||
385 | for (k = 0; | |
386 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
387 | k++) | |
388 | if (t->gdb_port == thread) | |
389 | return t; | |
390 | return NULL; | |
391 | } | |
a80b95ba | 392 | |
bb00b29d | 393 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 394 | |
bb00b29d TG |
395 | static void |
396 | darwin_suspend_inferior (struct inferior *inf) | |
397 | { | |
398 | if (!inf->private->suspended) | |
a80b95ba | 399 | { |
bb00b29d | 400 | kern_return_t kret; |
a80b95ba | 401 | |
bb00b29d TG |
402 | kret = task_suspend (inf->private->task); |
403 | MACH_CHECK_ERROR (kret); | |
a80b95ba | 404 | |
bb00b29d TG |
405 | inf->private->suspended = 1; |
406 | } | |
407 | } | |
a80b95ba | 408 | |
bb00b29d | 409 | /* Resume an inferior at Mach level. */ |
a80b95ba | 410 | |
bb00b29d TG |
411 | static void |
412 | darwin_resume_inferior (struct inferior *inf) | |
413 | { | |
414 | if (inf->private->suspended) | |
415 | { | |
416 | kern_return_t kret; | |
a80b95ba | 417 | |
bb00b29d TG |
418 | kret = task_resume (inf->private->task); |
419 | MACH_CHECK_ERROR (kret); | |
420 | ||
421 | inf->private->suspended = 0; | |
a80b95ba TG |
422 | } |
423 | } | |
424 | ||
bb00b29d TG |
425 | /* Iterator functions. */ |
426 | ||
427 | static int | |
428 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 429 | { |
bb00b29d TG |
430 | darwin_suspend_inferior (inf); |
431 | darwin_check_new_threads (inf); | |
432 | return 0; | |
433 | } | |
434 | ||
435 | static int | |
436 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
437 | { | |
438 | darwin_resume_inferior (inf); | |
439 | return 0; | |
a80b95ba TG |
440 | } |
441 | ||
bb00b29d TG |
442 | static void |
443 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
444 | { | |
445 | printf_unfiltered (_("message header:\n")); | |
446 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
447 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
448 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
449 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
450 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
451 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
452 | ||
453 | if (disp_body) | |
454 | { | |
455 | const unsigned char *data; | |
456 | const unsigned long *ldata; | |
457 | int size; | |
458 | int i; | |
459 | ||
460 | data = (unsigned char *)(hdr + 1); | |
461 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
462 | ||
463 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
464 | { | |
465 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
466 | mach_msg_port_descriptor_t *desc = | |
467 | (mach_msg_port_descriptor_t *)(bod + 1); | |
468 | int k; | |
469 | NDR_record_t *ndr; | |
470 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
471 | bod->msgh_descriptor_count); | |
472 | data += sizeof (mach_msg_body_t); | |
473 | size -= sizeof (mach_msg_body_t); | |
474 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
475 | switch (desc[k].type) | |
476 | { | |
477 | case MACH_MSG_PORT_DESCRIPTOR: | |
478 | printf_unfiltered | |
479 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
480 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
481 | break; | |
482 | default: | |
483 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
484 | k, desc[k].type); | |
485 | break; | |
486 | } | |
487 | data += bod->msgh_descriptor_count | |
488 | * sizeof (mach_msg_port_descriptor_t); | |
489 | size -= bod->msgh_descriptor_count | |
490 | * sizeof (mach_msg_port_descriptor_t); | |
491 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
492 | printf_unfiltered | |
493 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
494 | "int=%02x char=%02x float=%02x\n"), | |
495 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
496 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
497 | data += sizeof (NDR_record_t); | |
498 | size -= sizeof (NDR_record_t); | |
499 | } | |
500 | ||
501 | printf_unfiltered (_(" data:")); | |
502 | ldata = (const unsigned long *)data; | |
503 | for (i = 0; i < size / sizeof (unsigned long); i++) | |
504 | printf_unfiltered (" %08lx", ldata[i]); | |
505 | printf_unfiltered (_("\n")); | |
506 | } | |
507 | } | |
508 | ||
509 | static int | |
510 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
511 | struct inferior **pinf, | |
512 | darwin_thread_t **pthread) | |
a80b95ba | 513 | { |
bb00b29d TG |
514 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
515 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
516 | NDR_record_t *ndr; | |
517 | integer_t *data; | |
518 | struct inferior *inf; | |
519 | darwin_thread_t *thread; | |
520 | task_t task_port; | |
521 | thread_t thread_port; | |
a80b95ba | 522 | kern_return_t kret; |
bb00b29d | 523 | int i; |
a80b95ba | 524 | |
bb00b29d TG |
525 | /* Check message identifier. 2401 is exc. */ |
526 | if (hdr->msgh_id != 2401) | |
527 | return -1; | |
528 | ||
529 | /* Check message header. */ | |
530 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
531 | return -1; | |
532 | ||
533 | /* Check descriptors. */ | |
534 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
535 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
536 | || bod->msgh_descriptor_count != 2 | |
537 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
538 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
539 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
540 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
541 | return -1; | |
542 | ||
543 | /* Check data representation. */ | |
544 | ndr = (NDR_record_t *)(desc + 2); | |
545 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
546 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
547 | || ndr->mig_encoding != NDR_record.mig_encoding | |
548 | || ndr->int_rep != NDR_record.int_rep | |
549 | || ndr->char_rep != NDR_record.char_rep | |
550 | || ndr->float_rep != NDR_record.float_rep) | |
551 | return -1; | |
552 | ||
553 | /* Ok, the hard work. */ | |
554 | data = (integer_t *)(ndr + 1); | |
555 | ||
556 | /* Find process by port. */ | |
557 | task_port = desc[1].name; | |
558 | thread_port = desc[0].name; | |
559 | inf = darwin_find_inferior_by_task (task_port); | |
560 | if (inf == NULL) | |
561 | return -1; | |
562 | *pinf = inf; | |
563 | ||
564 | /* Find thread by port. */ | |
565 | /* Check for new threads. Do it early so that the port in the exception | |
566 | message can be deallocated. */ | |
567 | darwin_check_new_threads (inf); | |
568 | ||
569 | /* We got new rights to the task and the thread. Get rid of them. */ | |
a80b95ba TG |
570 | kret = mach_port_deallocate (mach_task_self (), task_port); |
571 | MACH_CHECK_ERROR (kret); | |
572 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
573 | MACH_CHECK_ERROR (kret); | |
574 | ||
bb00b29d TG |
575 | thread = darwin_find_thread (inf, thread_port); |
576 | if (thread == NULL) | |
577 | return -1; | |
578 | *pthread = thread; | |
579 | ||
580 | /* Finish decoding. */ | |
581 | gdb_assert (thread->msg_state == DARWIN_RUNNING); | |
582 | thread->event.header = *hdr; | |
583 | thread->event.thread_port = thread_port; | |
584 | thread->event.task_port = task_port; | |
585 | thread->event.ex_type = data[0]; | |
586 | thread->event.data_count = data[1]; | |
587 | ||
588 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
589 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
590 | + data[1] * sizeof (integer_t))) | |
591 | return -1; | |
592 | for (i = 0; i < data[1]; i++) | |
593 | thread->event.ex_data[i] = data[2 + i]; | |
594 | ||
595 | thread->msg_state = DARWIN_MESSAGE; | |
596 | ||
597 | return 0; | |
598 | } | |
599 | ||
600 | static void | |
601 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
602 | integer_t code) | |
603 | { | |
604 | mach_msg_header_t *rh = &reply->Head; | |
605 | rh->msgh_bits = MACH_MSGH_BITS(MACH_MSGH_BITS_REMOTE(hdr->msgh_bits), 0); | |
606 | rh->msgh_remote_port = hdr->msgh_remote_port; | |
607 | rh->msgh_size = (mach_msg_size_t)sizeof(mig_reply_error_t); | |
608 | rh->msgh_local_port = MACH_PORT_NULL; | |
609 | rh->msgh_id = hdr->msgh_id + 100; | |
610 | ||
611 | reply->NDR = NDR_record; | |
612 | reply->RetCode = code; | |
a80b95ba TG |
613 | } |
614 | ||
bb00b29d TG |
615 | static void |
616 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
617 | { |
618 | kern_return_t kret; | |
bb00b29d | 619 | mig_reply_error_t reply; |
a80b95ba | 620 | |
bb00b29d TG |
621 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
622 | ||
623 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
624 | reply.Head.msgh_size, 0, | |
625 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
626 | MACH_PORT_NULL); | |
a80b95ba TG |
627 | MACH_CHECK_ERROR (kret); |
628 | ||
bb00b29d TG |
629 | inf->private->pending_messages--; |
630 | } | |
631 | ||
632 | static void | |
633 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
634 | int step, int nsignal) | |
635 | { | |
636 | kern_return_t kret; | |
637 | int res; | |
638 | ||
a80b95ba | 639 | inferior_debug |
bb00b29d TG |
640 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
641 | thread->msg_state, thread->gdb_port, step, nsignal); | |
642 | ||
643 | switch (thread->msg_state) | |
a80b95ba | 644 | { |
bb00b29d TG |
645 | case DARWIN_MESSAGE: |
646 | if (thread->event.ex_type == EXC_SOFTWARE | |
647 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
648 | { | |
649 | /* Either deliver a new signal or cancel the signal received. */ | |
650 | res = PTRACE (PT_THUPDATE, inf->pid, | |
651 | (void *)(uintptr_t)thread->gdb_port, nsignal); | |
652 | if (res < 0) | |
653 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
654 | } | |
655 | else if (nsignal) | |
656 | { | |
657 | /* Note: ptrace is allowed only if the process is stopped. | |
658 | Directly send the signal to the thread. */ | |
659 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
660 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), | |
661 | thread->gdb_port, nsignal, res); | |
662 | thread->signaled = 1; | |
663 | } | |
664 | ||
665 | /* Set single step. */ | |
666 | inferior_debug (4, _("darwin_set_sstep (thread=%x, enable=%d)\n"), | |
667 | thread->gdb_port, step); | |
668 | darwin_set_sstep (thread->gdb_port, step); | |
669 | thread->single_step = step; | |
670 | ||
671 | darwin_send_reply (inf, thread); | |
672 | thread->msg_state = DARWIN_RUNNING; | |
673 | break; | |
674 | ||
675 | case DARWIN_RUNNING: | |
676 | break; | |
677 | ||
678 | case DARWIN_STOPPED: | |
679 | kret = thread_resume (thread->gdb_port); | |
680 | MACH_CHECK_ERROR (kret); | |
681 | ||
682 | thread->msg_state = DARWIN_RUNNING; | |
683 | break; | |
a80b95ba | 684 | } |
bb00b29d | 685 | } |
a80b95ba | 686 | |
bb00b29d | 687 | /* Resume all threads of the inferior. */ |
a80b95ba | 688 | |
bb00b29d TG |
689 | static void |
690 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
691 | { | |
692 | darwin_thread_t *thread; | |
693 | int k; | |
694 | ||
695 | for (k = 0; | |
696 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); | |
697 | k++) | |
698 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
699 | } |
700 | ||
bb00b29d | 701 | struct resume_inferior_threads_param |
a80b95ba | 702 | { |
bb00b29d TG |
703 | int step; |
704 | int nsignal; | |
705 | }; | |
706 | ||
707 | static int | |
708 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
709 | { | |
710 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
711 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
712 | ||
713 | darwin_resume_inferior_threads (inf, step, nsignal); | |
714 | ||
715 | return 0; | |
716 | } | |
717 | ||
718 | /* Suspend all threads of INF. */ | |
719 | ||
720 | static void | |
721 | darwin_suspend_inferior_threads (struct inferior *inf) | |
722 | { | |
723 | darwin_thread_t *thread; | |
a80b95ba | 724 | kern_return_t kret; |
bb00b29d TG |
725 | int k; |
726 | ||
727 | for (k = 0; | |
728 | VEC_iterate (darwin_thread_t, inf->private->threads, k, thread); | |
729 | k++) | |
730 | switch (thread->msg_state) | |
731 | { | |
732 | case DARWIN_STOPPED: | |
733 | case DARWIN_MESSAGE: | |
734 | break; | |
735 | case DARWIN_RUNNING: | |
736 | kret = thread_suspend (thread->gdb_port); | |
737 | MACH_CHECK_ERROR (kret); | |
738 | thread->msg_state = DARWIN_STOPPED; | |
739 | break; | |
740 | } | |
741 | } | |
a80b95ba | 742 | |
bb00b29d TG |
743 | static void |
744 | darwin_resume (ptid_t ptid, int step, enum target_signal signal) | |
745 | { | |
746 | struct target_waitstatus status; | |
747 | int pid; | |
a80b95ba | 748 | |
bb00b29d TG |
749 | kern_return_t kret; |
750 | int res; | |
751 | int nsignal; | |
752 | struct inferior *inf; | |
a80b95ba | 753 | |
bb00b29d TG |
754 | inferior_debug |
755 | (2, _("darwin_resume: pid=%d, tid=0x%x, step=%d, signal=%d\n"), | |
756 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); | |
757 | ||
758 | if (signal == TARGET_SIGNAL_0) | |
759 | nsignal = 0; | |
760 | else | |
761 | nsignal = target_signal_to_host (signal); | |
a80b95ba | 762 | |
bb00b29d TG |
763 | /* Don't try to single step all threads. */ |
764 | if (step) | |
765 | ptid = inferior_ptid; | |
766 | ||
767 | /* minus_one_ptid is RESUME_ALL. */ | |
768 | if (ptid_equal (ptid, minus_one_ptid)) | |
a80b95ba | 769 | { |
bb00b29d TG |
770 | struct resume_inferior_threads_param param; |
771 | ||
772 | param.nsignal = nsignal; | |
773 | param.step = step; | |
a80b95ba | 774 | |
bb00b29d TG |
775 | /* Resume threads. */ |
776 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
777 | /* Resume tasks. */ | |
778 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
779 | } | |
780 | else | |
a80b95ba | 781 | { |
bb00b29d TG |
782 | struct inferior *inf = find_inferior_pid (ptid_get_pid (ptid)); |
783 | long tid = ptid_get_tid (ptid); | |
784 | ||
785 | /* Stop the inferior (should be useless). */ | |
786 | darwin_suspend_inferior (inf); | |
787 | ||
788 | if (tid == 0) | |
789 | darwin_resume_inferior_threads (inf, step, nsignal); | |
790 | else | |
791 | { | |
792 | darwin_thread_t *thread; | |
793 | ||
794 | /* Suspend threads of the task. */ | |
795 | darwin_suspend_inferior_threads (inf); | |
796 | ||
797 | /* Resume the selected thread. */ | |
798 | thread = darwin_find_thread (inf, tid); | |
799 | gdb_assert (thread); | |
800 | darwin_resume_thread (inf, thread, step, nsignal); | |
801 | } | |
802 | ||
803 | /* Resume the task. */ | |
804 | darwin_resume_inferior (inf); | |
a80b95ba | 805 | } |
bb00b29d | 806 | } |
a80b95ba | 807 | |
bb00b29d TG |
808 | static void |
809 | darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, | |
810 | enum target_signal signal) | |
811 | { | |
812 | return darwin_resume (ptid, step, signal); | |
813 | } | |
814 | ||
815 | static ptid_t | |
816 | darwin_decode_message (mach_msg_header_t *hdr, | |
817 | darwin_thread_t **pthread, | |
818 | struct inferior **pinf, | |
819 | struct target_waitstatus *status) | |
820 | { | |
821 | darwin_thread_t *thread; | |
822 | struct inferior *inf; | |
a80b95ba TG |
823 | |
824 | /* Exception message. */ | |
825 | if (hdr->msgh_local_port == darwin_ex_port) | |
826 | { | |
bb00b29d TG |
827 | int res; |
828 | ||
829 | /* Decode message. */ | |
830 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
831 | ||
832 | if (res < 0) | |
a80b95ba | 833 | { |
bb00b29d TG |
834 | /* Should not happen... */ |
835 | printf_unfiltered (_("darwin_wait: ill-formatted message (id=%x)\n"), | |
a80b95ba | 836 | hdr->msgh_id); |
bb00b29d | 837 | /* FIXME: send a failure reply? */ |
a80b95ba TG |
838 | status->kind = TARGET_WAITKIND_SPURIOUS; |
839 | return minus_one_ptid; | |
840 | } | |
bb00b29d TG |
841 | *pinf = inf; |
842 | *pthread = thread; | |
843 | inf->private->pending_messages++; | |
a80b95ba TG |
844 | |
845 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
846 | thread->msg_state = DARWIN_MESSAGE; |
847 | ||
848 | inferior_debug (4, _("darwin_wait: thread=%x, got %s\n"), | |
849 | thread->gdb_port, | |
850 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 851 | |
bb00b29d | 852 | switch (thread->event.ex_type) |
a80b95ba TG |
853 | { |
854 | case EXC_BAD_ACCESS: | |
855 | status->value.sig = TARGET_EXC_BAD_ACCESS; | |
856 | break; | |
857 | case EXC_BAD_INSTRUCTION: | |
858 | status->value.sig = TARGET_EXC_BAD_INSTRUCTION; | |
859 | break; | |
860 | case EXC_ARITHMETIC: | |
861 | status->value.sig = TARGET_EXC_ARITHMETIC; | |
862 | break; | |
863 | case EXC_EMULATION: | |
864 | status->value.sig = TARGET_EXC_EMULATION; | |
865 | break; | |
866 | case EXC_SOFTWARE: | |
bb00b29d | 867 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 868 | { |
bb00b29d TG |
869 | status->value.sig = |
870 | target_signal_from_host (thread->event.ex_data[1]); | |
871 | inferior_debug (5, _(" (signal %d: %s)\n"), | |
872 | thread->event.ex_data[1], | |
a80b95ba | 873 | target_signal_to_name (status->value.sig)); |
bb00b29d TG |
874 | |
875 | /* If the thread is stopped because it has received a signal | |
876 | that gdb has just sent, continue. */ | |
877 | if (thread->signaled) | |
878 | { | |
879 | thread->signaled = 0; | |
880 | darwin_send_reply (inf, thread); | |
881 | thread->msg_state = DARWIN_RUNNING; | |
882 | status->kind = TARGET_WAITKIND_IGNORE; | |
883 | } | |
a80b95ba TG |
884 | } |
885 | else | |
bb00b29d | 886 | status->value.sig = TARGET_EXC_SOFTWARE; |
a80b95ba TG |
887 | break; |
888 | case EXC_BREAKPOINT: | |
889 | /* Many internal GDB routines expect breakpoints to be reported | |
890 | as TARGET_SIGNAL_TRAP, and will report TARGET_EXC_BREAKPOINT | |
891 | as a spurious signal. */ | |
892 | status->value.sig = TARGET_SIGNAL_TRAP; | |
893 | break; | |
894 | default: | |
895 | status->value.sig = TARGET_SIGNAL_UNKNOWN; | |
896 | break; | |
897 | } | |
898 | ||
bb00b29d TG |
899 | return ptid_build (inf->pid, 0, thread->gdb_port); |
900 | } | |
901 | ||
902 | *pinf = NULL; | |
903 | *pthread = NULL; | |
904 | ||
905 | inf = darwin_find_inferior_by_notify (hdr->msgh_local_port); | |
906 | if (inf != NULL) | |
907 | { | |
908 | if (!inf->private->no_ptrace) | |
909 | { | |
910 | pid_t res; | |
911 | int wstatus; | |
912 | ||
913 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
914 | if (res < 0 || res != inf->pid) | |
915 | { | |
916 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
917 | res, safe_strerror (errno)); | |
918 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
919 | return minus_one_ptid; | |
920 | } | |
921 | if (WIFEXITED (wstatus)) | |
922 | { | |
923 | status->kind = TARGET_WAITKIND_EXITED; | |
924 | status->value.integer = WEXITSTATUS (wstatus); | |
925 | } | |
926 | else | |
927 | { | |
928 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
929 | status->value.sig = WTERMSIG (wstatus); | |
930 | } | |
931 | ||
932 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=%x\n"), | |
933 | res, wstatus); | |
934 | ||
935 | /* Looks necessary on Leopard and harmless... */ | |
936 | wait4 (inf->pid, &wstatus, 0, NULL); | |
937 | ||
938 | return ptid_build (inf->pid, 0, 0); | |
939 | } | |
940 | else | |
941 | { | |
942 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); | |
943 | status->kind = TARGET_WAITKIND_EXITED; | |
944 | status->value.integer = 0; /* Don't know. */ | |
945 | return ptid_build (inf->pid, 0, 0); | |
946 | } | |
947 | } | |
948 | ||
949 | printf_unfiltered (_("Bad local-port: %x\n"), hdr->msgh_local_port); | |
950 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
951 | return minus_one_ptid; | |
952 | } | |
953 | ||
954 | static int | |
955 | cancel_breakpoint (ptid_t ptid) | |
956 | { | |
957 | /* Arrange for a breakpoint to be hit again later. We will handle | |
958 | the current event, eventually we will resume this thread, and this | |
959 | breakpoint will trap again. | |
960 | ||
961 | If we do not do this, then we run the risk that the user will | |
962 | delete or disable the breakpoint, but the thread will have already | |
963 | tripped on it. */ | |
964 | ||
965 | struct regcache *regcache = get_thread_regcache (ptid); | |
966 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
967 | CORE_ADDR pc; | |
a80b95ba | 968 | |
bb00b29d TG |
969 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
970 | if (breakpoint_inserted_here_p (pc)) | |
971 | { | |
972 | inferior_debug (4, "cancel_breakpoint for thread %x\n", | |
973 | ptid_get_tid (ptid)); | |
974 | ||
975 | /* Back up the PC if necessary. */ | |
976 | if (gdbarch_decr_pc_after_break (gdbarch)) | |
977 | regcache_write_pc (regcache, pc); | |
978 | ||
979 | return 1; | |
a80b95ba | 980 | } |
bb00b29d TG |
981 | return 0; |
982 | } | |
983 | ||
984 | static ptid_t | |
985 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
986 | { | |
987 | kern_return_t kret; | |
988 | union | |
989 | { | |
990 | mach_msg_header_t hdr; | |
991 | char data[0x100]; | |
992 | } msgin; | |
993 | mach_msg_header_t *hdr = &msgin.hdr; | |
994 | ptid_t res; | |
995 | darwin_thread_t *thread; | |
996 | struct inferior *inf; | |
997 | ||
998 | inferior_debug | |
999 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
1000 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
1001 | ||
1002 | /* Handle fake stop events at first. */ | |
1003 | if (darwin_inf_fake_stop != NULL) | |
1004 | { | |
1005 | inf = darwin_inf_fake_stop; | |
1006 | darwin_inf_fake_stop = NULL; | |
1007 | ||
1008 | status->kind = TARGET_WAITKIND_STOPPED; | |
1009 | status->value.sig = TARGET_SIGNAL_TRAP; | |
1010 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); | |
1011 | thread->msg_state = DARWIN_STOPPED; | |
1012 | return ptid_build (inf->pid, 0, thread->gdb_port); | |
1013 | } | |
1014 | ||
1015 | do | |
1016 | { | |
1017 | /* set_sigint_trap (); */ | |
1018 | ||
1019 | /* Wait for a message. */ | |
1020 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1021 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1022 | ||
1023 | /* clear_sigint_trap (); */ | |
1024 | ||
1025 | if (kret == MACH_RCV_INTERRUPTED) | |
1026 | { | |
1027 | status->kind = TARGET_WAITKIND_IGNORE; | |
1028 | return minus_one_ptid; | |
1029 | } | |
1030 | ||
1031 | if (kret != MACH_MSG_SUCCESS) | |
1032 | { | |
1033 | inferior_debug (5, _("mach_msg: ret=%x\n"), kret); | |
1034 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
1035 | return minus_one_ptid; | |
1036 | } | |
1037 | ||
1038 | /* Debug: display message. */ | |
1039 | if (darwin_debug_flag > 10) | |
1040 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1041 | ||
1042 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
1043 | ||
1044 | if (inf == NULL) | |
1045 | return res; | |
1046 | } | |
1047 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1048 | ||
1049 | /* Stop all tasks. */ | |
1050 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1051 | ||
1052 | /* Read pending messages. */ | |
1053 | while (1) | |
a80b95ba | 1054 | { |
bb00b29d TG |
1055 | struct target_waitstatus status2; |
1056 | ptid_t ptid2; | |
1057 | ||
1058 | kret = mach_msg (&msgin.hdr, | |
1059 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1060 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1061 | ||
1062 | if (kret == MACH_RCV_TIMED_OUT) | |
1063 | break; | |
1064 | if (kret != MACH_MSG_SUCCESS) | |
1065 | { | |
1066 | inferior_debug | |
1067 | (5, _("darwin_wait: mach_msg(pending) ret=%x\n"), kret); | |
1068 | break; | |
1069 | } | |
1070 | ||
1071 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); | |
a80b95ba | 1072 | |
bb00b29d TG |
1073 | if (inf != NULL && thread != NULL |
1074 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1075 | { |
bb00b29d TG |
1076 | if (thread->single_step |
1077 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) | |
1078 | { | |
1079 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1080 | darwin_send_reply (inf, thread); | |
1081 | thread->msg_state = DARWIN_RUNNING; | |
1082 | } | |
1083 | else | |
1084 | inferior_debug | |
1085 | (3, _("darwin_wait: thread %x hit a non-gdb breakpoint\n"), | |
1086 | thread->gdb_port); | |
a80b95ba | 1087 | } |
bb00b29d TG |
1088 | else |
1089 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1090 | } | |
1091 | return res; | |
1092 | } | |
a80b95ba | 1093 | |
bb00b29d TG |
1094 | static ptid_t |
1095 | darwin_wait_to (struct target_ops *ops, | |
1096 | ptid_t ptid, struct target_waitstatus *status, int options) | |
1097 | { | |
1098 | return darwin_wait (ptid, status); | |
1099 | } | |
a80b95ba | 1100 | |
bb00b29d TG |
1101 | static void |
1102 | darwin_stop (ptid_t t) | |
1103 | { | |
1104 | struct inferior *inf = current_inferior (); | |
a80b95ba | 1105 | |
bb00b29d TG |
1106 | /* FIXME: handle in no_ptrace mode. */ |
1107 | gdb_assert (!inf->private->no_ptrace); | |
1108 | kill (inf->pid, SIGINT); | |
a80b95ba TG |
1109 | } |
1110 | ||
1111 | static void | |
1112 | darwin_mourn_inferior (struct target_ops *ops) | |
1113 | { | |
1114 | struct inferior *inf = current_inferior (); | |
1115 | kern_return_t kret; | |
1116 | mach_port_t prev; | |
1117 | int i; | |
1118 | ||
1119 | unpush_target (darwin_ops); | |
1120 | ||
1121 | /* Deallocate threads. */ | |
bb00b29d | 1122 | if (inf->private->threads) |
a80b95ba TG |
1123 | { |
1124 | int k; | |
bb00b29d TG |
1125 | darwin_thread_t *t; |
1126 | for (k = 0; | |
1127 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1128 | k++) | |
a80b95ba | 1129 | { |
bb00b29d | 1130 | kret = mach_port_deallocate (gdb_task, t->gdb_port); |
a80b95ba TG |
1131 | MACH_CHECK_ERROR (kret); |
1132 | } | |
bb00b29d TG |
1133 | VEC_free (darwin_thread_t, inf->private->threads); |
1134 | inf->private->threads = NULL; | |
a80b95ba TG |
1135 | } |
1136 | ||
bb00b29d TG |
1137 | kret = mach_port_move_member (gdb_task, |
1138 | inf->private->notify_port, MACH_PORT_NULL); | |
1139 | gdb_assert (kret == KERN_SUCCESS); | |
1140 | ||
1141 | kret = mach_port_request_notification (gdb_task, inf->private->task, | |
a80b95ba | 1142 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1143 | MACH_PORT_NULL, |
a80b95ba TG |
1144 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1145 | &prev); | |
1146 | /* This can fail if the task is dead. */ | |
bb00b29d TG |
1147 | inferior_debug (4, "task=%x, prev=%x, notify_port=%x\n", |
1148 | inf->private->task, prev, inf->private->notify_port); | |
1149 | ||
a80b95ba TG |
1150 | if (kret == KERN_SUCCESS) |
1151 | { | |
1152 | kret = mach_port_deallocate (gdb_task, prev); | |
1153 | MACH_CHECK_ERROR (kret); | |
1154 | } | |
1155 | ||
bb00b29d TG |
1156 | kret = mach_port_destroy (gdb_task, inf->private->notify_port); |
1157 | MACH_CHECK_ERROR (kret); | |
1158 | ||
1159 | ||
a80b95ba | 1160 | /* Deallocate saved exception ports. */ |
bb00b29d | 1161 | for (i = 0; i < inf->private->exception_info.count; i++) |
a80b95ba TG |
1162 | { |
1163 | kret = mach_port_deallocate | |
bb00b29d | 1164 | (gdb_task, inf->private->exception_info.ports[i]); |
a80b95ba TG |
1165 | MACH_CHECK_ERROR (kret); |
1166 | } | |
bb00b29d | 1167 | inf->private->exception_info.count = 0; |
a80b95ba | 1168 | |
bb00b29d | 1169 | kret = mach_port_deallocate (gdb_task, inf->private->task); |
a80b95ba TG |
1170 | MACH_CHECK_ERROR (kret); |
1171 | ||
bb00b29d TG |
1172 | xfree (inf->private); |
1173 | inf->private = NULL; | |
a80b95ba TG |
1174 | |
1175 | generic_mourn_inferior (); | |
1176 | } | |
1177 | ||
1178 | static void | |
bb00b29d | 1179 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1180 | { |
bb00b29d TG |
1181 | int k; |
1182 | darwin_thread_t *t; | |
a80b95ba | 1183 | |
bb00b29d TG |
1184 | for (k = 0; |
1185 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1186 | k++) | |
1187 | { | |
1188 | if (t->msg_state == DARWIN_MESSAGE) | |
1189 | darwin_resume_thread (inf, t, 0, 0); | |
1190 | } | |
a80b95ba TG |
1191 | } |
1192 | ||
1193 | static void | |
bb00b29d | 1194 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1195 | { |
1196 | struct target_waitstatus wstatus; | |
1197 | ptid_t ptid; | |
1198 | kern_return_t kret; | |
1199 | int status; | |
1200 | int res; | |
1201 | ||
bb00b29d | 1202 | gdb_assert (inf != NULL); |
a80b95ba | 1203 | |
bb00b29d | 1204 | darwin_suspend_inferior (inf); |
a80b95ba | 1205 | |
bb00b29d | 1206 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1207 | |
bb00b29d TG |
1208 | if (inf->private->no_ptrace) |
1209 | return; | |
a80b95ba | 1210 | |
bb00b29d TG |
1211 | res = kill (inf->pid, SIGSTOP); |
1212 | if (res != 0) | |
1213 | warning (_("cannot kill: %s\n"), safe_strerror (errno)); | |
a80b95ba | 1214 | |
bb00b29d TG |
1215 | /* Wait until the process is really stopped. */ |
1216 | while (1) | |
a80b95ba | 1217 | { |
bb00b29d TG |
1218 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1219 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
1220 | && wstatus.value.sig == TARGET_SIGNAL_STOP) | |
1221 | break; | |
a80b95ba TG |
1222 | } |
1223 | } | |
1224 | ||
1225 | static kern_return_t | |
1226 | darwin_save_exception_ports (darwin_inferior *inf) | |
1227 | { | |
1228 | kern_return_t kret; | |
1229 | ||
1230 | inf->exception_info.count = | |
1231 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1232 | ||
1233 | kret = task_get_exception_ports | |
1234 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1235 | &inf->exception_info.count, inf->exception_info.ports, | |
1236 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1237 | return kret; | |
1238 | } | |
1239 | ||
1240 | static kern_return_t | |
1241 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1242 | { | |
1243 | int i; | |
1244 | kern_return_t kret; | |
1245 | ||
1246 | for (i = 0; i < inf->exception_info.count; i++) | |
1247 | { | |
1248 | kret = task_set_exception_ports | |
1249 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1250 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1251 | if (kret != KERN_SUCCESS) | |
1252 | return kret; | |
1253 | } | |
1254 | ||
1255 | return KERN_SUCCESS; | |
1256 | } | |
1257 | ||
1258 | static void | |
bb00b29d TG |
1259 | darwin_kill_inferior (struct target_ops *ops) |
1260 | { | |
1261 | struct inferior *inf = current_inferior (); | |
1262 | struct target_waitstatus wstatus; | |
1263 | ptid_t ptid; | |
1264 | kern_return_t kret; | |
1265 | int status; | |
1266 | int res; | |
1267 | ||
1268 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1269 | return; | |
1270 | ||
1271 | gdb_assert (inf != NULL); | |
1272 | ||
1273 | if (!inf->private->no_ptrace) | |
1274 | { | |
1275 | darwin_stop_inferior (inf); | |
1276 | ||
1277 | res = PTRACE (PT_KILL, inf->pid, 0, 0); | |
1278 | gdb_assert (res == 0); | |
1279 | ||
1280 | darwin_reply_to_all_pending_messages (inf); | |
1281 | ||
1282 | darwin_resume_inferior (inf); | |
1283 | ||
1284 | ptid = darwin_wait (inferior_ptid, &wstatus); | |
1285 | } | |
1286 | else | |
1287 | { | |
1288 | kret = darwin_restore_exception_ports (inf->private); | |
1289 | MACH_CHECK_ERROR (kret); | |
1290 | ||
1291 | darwin_reply_to_all_pending_messages (inf); | |
1292 | ||
1293 | darwin_resume_inferior (inf); | |
1294 | ||
1295 | res = kill (inf->pid, 9); | |
1296 | ||
1297 | ptid = darwin_wait (inferior_ptid, &wstatus); | |
1298 | } | |
1299 | ||
1300 | target_mourn_inferior (); | |
1301 | } | |
1302 | ||
1303 | static void | |
1304 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1305 | { |
a80b95ba TG |
1306 | kern_return_t kret; |
1307 | mach_port_t prev_port; | |
1308 | int traps_expected; | |
bb00b29d | 1309 | mach_port_t prev_not; |
a80b95ba TG |
1310 | exception_mask_t mask; |
1311 | ||
bb00b29d TG |
1312 | inf->private = XZALLOC (darwin_inferior); |
1313 | ||
1314 | kret = task_for_pid (gdb_task, inf->pid, &inf->private->task); | |
a80b95ba TG |
1315 | if (kret != KERN_SUCCESS) |
1316 | { | |
1317 | int status; | |
a80b95ba TG |
1318 | |
1319 | if (!inf->attach_flag) | |
1320 | { | |
bb00b29d TG |
1321 | kill (inf->pid, 9); |
1322 | waitpid (inf->pid, &status, 0); | |
a80b95ba TG |
1323 | } |
1324 | ||
1325 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
1326 | " (please check gdb is setgid procmod)"), | |
bb00b29d | 1327 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
a80b95ba TG |
1328 | } |
1329 | ||
bb00b29d TG |
1330 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
1331 | inf->private->task, inf->pid); | |
a80b95ba TG |
1332 | |
1333 | if (darwin_ex_port == MACH_PORT_NULL) | |
1334 | { | |
1335 | /* Create a port to get exceptions. */ | |
1336 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1337 | &darwin_ex_port); | |
1338 | gdb_assert (kret == KERN_SUCCESS); | |
1339 | ||
1340 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, | |
1341 | MACH_MSG_TYPE_MAKE_SEND); | |
1342 | gdb_assert (kret == KERN_SUCCESS); | |
1343 | ||
1344 | /* Create a port set and put ex_port in it. */ | |
1345 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1346 | &darwin_port_set); | |
1347 | gdb_assert (kret == KERN_SUCCESS); | |
1348 | ||
1349 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); | |
1350 | gdb_assert (kret == KERN_SUCCESS); | |
bb00b29d | 1351 | } |
a80b95ba | 1352 | |
bb00b29d TG |
1353 | /* Create a port to be notified when the child task terminates. */ |
1354 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1355 | &inf->private->notify_port); | |
1356 | gdb_assert (kret == KERN_SUCCESS); | |
a80b95ba | 1357 | |
bb00b29d TG |
1358 | kret = mach_port_move_member (gdb_task, |
1359 | inf->private->notify_port, darwin_port_set); | |
1360 | gdb_assert (kret == KERN_SUCCESS); | |
a80b95ba | 1361 | |
bb00b29d | 1362 | kret = mach_port_request_notification (gdb_task, inf->private->task, |
a80b95ba | 1363 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1364 | inf->private->notify_port, |
a80b95ba | 1365 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
bb00b29d | 1366 | &prev_not); |
a80b95ba | 1367 | gdb_assert (kret == KERN_SUCCESS); |
bb00b29d | 1368 | gdb_assert (prev_not == MACH_PORT_NULL); |
a80b95ba | 1369 | |
bb00b29d | 1370 | kret = darwin_save_exception_ports (inf->private); |
a80b95ba TG |
1371 | gdb_assert (kret == KERN_SUCCESS); |
1372 | ||
1373 | /* Set exception port. */ | |
1374 | if (enable_mach_exceptions) | |
1375 | mask = EXC_MASK_ALL; | |
1376 | else | |
bb00b29d TG |
1377 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
1378 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, | |
1379 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); | |
a80b95ba TG |
1380 | gdb_assert (kret == KERN_SUCCESS); |
1381 | ||
1382 | push_target (darwin_ops); | |
1383 | } | |
1384 | ||
1385 | static void | |
bb00b29d | 1386 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1387 | { |
bb00b29d TG |
1388 | darwin_thread_t *thread; |
1389 | ptid_t new_ptid; | |
a80b95ba TG |
1390 | |
1391 | darwin_check_new_threads (inf); | |
1392 | ||
bb00b29d TG |
1393 | gdb_assert (inf->private->threads |
1394 | && VEC_length (darwin_thread_t, inf->private->threads) > 0); | |
1395 | thread = VEC_index (darwin_thread_t, inf->private->threads, 0); | |
1396 | ||
1397 | /* Note: fork_inferior automatically add a thead but it uses a wrong ptid. | |
1398 | Fix up. */ | |
1399 | new_ptid = ptid_build (inf->pid, 0, thread->gdb_port); | |
1400 | thread_change_ptid (inferior_ptid, new_ptid); | |
1401 | inferior_ptid = new_ptid; | |
1402 | } | |
1403 | ||
1404 | /* The child must synchronize with gdb: gdb must set the exception port | |
1405 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1406 | FIXME: is there a lighter way ? */ | |
1407 | static int ptrace_fds[2]; | |
1408 | ||
1409 | static void | |
1410 | darwin_ptrace_me (void) | |
1411 | { | |
1412 | int res; | |
1413 | char c; | |
1414 | ||
1415 | /* Close write end point. */ | |
1416 | close (ptrace_fds[1]); | |
1417 | ||
1418 | /* Wait until gdb is ready. */ | |
1419 | res = read (ptrace_fds[0], &c, 1); | |
1420 | gdb_assert (res == 0); | |
1421 | close (ptrace_fds[0]); | |
1422 | ||
1423 | /* Get rid of privileges. */ | |
1424 | setegid (getgid ()); | |
1425 | ||
1426 | /* Set TRACEME. */ | |
1427 | PTRACE (PT_TRACE_ME, 0, 0, 0); | |
1428 | ||
1429 | /* Redirect signals to exception port. */ | |
1430 | PTRACE (PT_SIGEXC, 0, 0, 0); | |
1431 | } | |
1432 | ||
1433 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1434 | static void | |
1435 | darwin_pre_ptrace (void) | |
1436 | { | |
1437 | if (pipe (ptrace_fds) != 0) | |
1438 | { | |
1439 | ptrace_fds[0] = -1; | |
1440 | ptrace_fds[1] = -1; | |
1441 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1442 | } | |
a80b95ba TG |
1443 | } |
1444 | ||
1445 | static void | |
1446 | darwin_ptrace_him (int pid) | |
1447 | { | |
1448 | task_t itask; | |
1449 | kern_return_t kret; | |
1450 | mach_port_t prev_port; | |
1451 | int traps_expected; | |
bb00b29d | 1452 | struct inferior *inf = current_inferior (); |
a80b95ba | 1453 | |
bb00b29d | 1454 | darwin_attach_pid (inf); |
a80b95ba TG |
1455 | |
1456 | /* Let's the child run. */ | |
1457 | close (ptrace_fds[0]); | |
1458 | close (ptrace_fds[1]); | |
1459 | ||
bb00b29d TG |
1460 | darwin_init_thread_list (inf); |
1461 | ||
a80b95ba TG |
1462 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
1463 | } | |
1464 | ||
1465 | static void | |
1466 | darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
1467 | char *allargs, char **env, int from_tty) | |
1468 | { | |
1469 | /* Do the hard work. */ | |
1470 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, darwin_ptrace_him, | |
1471 | darwin_pre_ptrace, NULL); | |
bb00b29d | 1472 | |
a80b95ba TG |
1473 | /* Return now in case of error. */ |
1474 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1475 | return; | |
1476 | } | |
1477 | \f | |
1478 | ||
1479 | /* Attach to process PID, then initialize for debugging it | |
1480 | and wait for the trace-trap that results from attaching. */ | |
1481 | static void | |
1482 | darwin_attach (struct target_ops *ops, char *args, int from_tty) | |
1483 | { | |
1484 | pid_t pid; | |
1485 | pid_t pid2; | |
1486 | int wstatus; | |
1487 | int res; | |
1488 | struct inferior *inf; | |
bb00b29d | 1489 | kern_return_t kret; |
a80b95ba TG |
1490 | |
1491 | if (!args) | |
1492 | error_no_arg (_("process-id to attach")); | |
1493 | ||
1494 | pid = atoi (args); | |
1495 | ||
1496 | if (pid == getpid ()) /* Trying to masturbate? */ | |
1497 | error (_("I refuse to debug myself!")); | |
1498 | ||
1499 | if (from_tty) | |
bb00b29d TG |
1500 | { |
1501 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1502 | |
bb00b29d TG |
1503 | if (exec_file) |
1504 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
1505 | target_pid_to_str (pid_to_ptid (pid))); | |
1506 | else | |
1507 | printf_unfiltered (_("Attaching to %s\n"), | |
1508 | target_pid_to_str (pid_to_ptid (pid))); | |
1509 | ||
1510 | gdb_flush (gdb_stdout); | |
1511 | } | |
1512 | ||
1513 | if (pid == 0 || kill (pid, 0) < 0) | |
1514 | error (_("Can't attach to process %d: %s (%d)"), | |
1515 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1516 | |
bb00b29d | 1517 | inferior_ptid = pid_to_ptid (pid); |
a80b95ba TG |
1518 | inf = add_inferior (pid); |
1519 | inf->attach_flag = 1; | |
bb00b29d TG |
1520 | /* Always add a main thread. */ |
1521 | add_thread_silent (inferior_ptid); | |
a80b95ba | 1522 | |
bb00b29d | 1523 | darwin_attach_pid (inf); |
a80b95ba | 1524 | |
bb00b29d | 1525 | darwin_suspend_inferior (inf); |
a80b95ba | 1526 | |
bb00b29d | 1527 | darwin_init_thread_list (inf); |
a80b95ba | 1528 | |
bb00b29d | 1529 | darwin_check_osabi (inf->private, ptid_get_tid (inferior_ptid)); |
a80b95ba | 1530 | |
bb00b29d TG |
1531 | gdb_assert (darwin_inf_fake_stop == NULL); |
1532 | darwin_inf_fake_stop = inf; | |
1533 | inf->private->no_ptrace = 1; | |
a80b95ba TG |
1534 | } |
1535 | ||
1536 | /* Take a program previously attached to and detaches it. | |
1537 | The program resumes execution and will no longer stop | |
1538 | on signals, etc. We'd better not have left any breakpoints | |
1539 | in the program or it'll die when it hits one. For this | |
1540 | to work, it may be necessary for the process to have been | |
1541 | previously attached. It *might* work if the program was | |
1542 | started via fork. */ | |
1543 | static void | |
1544 | darwin_detach (struct target_ops *ops, char *args, int from_tty) | |
1545 | { | |
bb00b29d TG |
1546 | pid_t pid = ptid_get_pid (inferior_ptid); |
1547 | struct inferior *inf = current_inferior (); | |
a80b95ba TG |
1548 | kern_return_t kret; |
1549 | int res; | |
1550 | ||
bb00b29d | 1551 | /* Display message. */ |
a80b95ba TG |
1552 | if (from_tty) |
1553 | { | |
1554 | char *exec_file = get_exec_file (0); | |
1555 | if (exec_file == 0) | |
1556 | exec_file = ""; | |
bb00b29d TG |
1557 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
1558 | target_pid_to_str (pid_to_ptid (pid))); | |
a80b95ba TG |
1559 | gdb_flush (gdb_stdout); |
1560 | } | |
1561 | ||
bb00b29d TG |
1562 | /* If ptrace() is in use, stop the process. */ |
1563 | if (!inf->private->no_ptrace) | |
1564 | darwin_stop_inferior (inf); | |
a80b95ba | 1565 | |
bb00b29d | 1566 | kret = darwin_restore_exception_ports (inf->private); |
a80b95ba TG |
1567 | MACH_CHECK_ERROR (kret); |
1568 | ||
bb00b29d | 1569 | if (!inf->private->no_ptrace) |
a80b95ba | 1570 | { |
bb00b29d TG |
1571 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1572 | if (res != 0) | |
1573 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1574 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1575 | } |
1576 | ||
bb00b29d | 1577 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1578 | |
bb00b29d | 1579 | darwin_resume_inferior (inf); |
a80b95ba TG |
1580 | |
1581 | darwin_mourn_inferior (ops); | |
1582 | } | |
1583 | ||
1584 | static void | |
1585 | darwin_files_info (struct target_ops *ops) | |
1586 | { | |
a80b95ba TG |
1587 | } |
1588 | ||
1589 | static char * | |
117de6a9 | 1590 | darwin_pid_to_str (struct target_ops *ops, ptid_t ptid) |
a80b95ba | 1591 | { |
bb00b29d TG |
1592 | static char buf[80]; |
1593 | long tid = ptid_get_tid (ptid); | |
1594 | ||
1595 | if (tid != 0) | |
1596 | { | |
1597 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
1598 | tid, ptid_get_pid (ptid)); | |
1599 | return buf; | |
1600 | } | |
a80b95ba | 1601 | |
bb00b29d | 1602 | return normal_pid_to_str (ptid); |
a80b95ba TG |
1603 | } |
1604 | ||
1605 | static int | |
28439f5e | 1606 | darwin_thread_alive (struct target_ops *ops, ptid_t ptid) |
a80b95ba TG |
1607 | { |
1608 | return 1; | |
1609 | } | |
1610 | ||
1611 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
1612 | copy it to RDADDR in gdb's address space. | |
1613 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
1614 | to ADDR in inferior task's address space. | |
1615 | Return 0 on failure; number of bytes read / writen otherwise. */ | |
1616 | static int | |
1617 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
1618 | char *rdaddr, const char *wraddr, int length) | |
1619 | { | |
bb00b29d | 1620 | kern_return_t kret; |
a80b95ba TG |
1621 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
1622 | mach_vm_address_t low_address = (mach_vm_address_t) (addr - offset); | |
1623 | mach_vm_size_t aligned_length = (mach_vm_size_t) PAGE_ROUND (offset + length); | |
1624 | pointer_t copied; | |
1625 | int copy_count; | |
1626 | mach_vm_size_t remaining_length; | |
1627 | mach_vm_address_t region_address; | |
1628 | mach_vm_size_t region_length; | |
1629 | ||
bb00b29d TG |
1630 | inferior_debug (8, _("darwin_read_write_inferior(task=%x, %s, len=%d)\n"), |
1631 | task, core_addr_to_string (addr), length); | |
1632 | ||
a80b95ba | 1633 | /* Get memory from inferior with page aligned addresses */ |
bb00b29d | 1634 | kret = mach_vm_read (task, low_address, aligned_length, |
a80b95ba | 1635 | &copied, ©_count); |
bb00b29d | 1636 | if (kret != KERN_SUCCESS) |
a80b95ba | 1637 | { |
bb00b29d TG |
1638 | inferior_debug |
1639 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
1640 | core_addr_to_string (addr), mach_error_string (kret)); | |
a80b95ba TG |
1641 | return 0; |
1642 | } | |
1643 | ||
1644 | if (rdaddr != NULL) | |
1645 | memcpy (rdaddr, (char *)copied + offset, length); | |
1646 | ||
1647 | if (wraddr == NULL) | |
1648 | goto out; | |
1649 | ||
1650 | memcpy ((char *)copied + offset, wraddr, length); | |
1651 | ||
1652 | /* Do writes atomically. | |
1653 | First check for holes and unwritable memory. */ | |
1654 | for (region_address = low_address, remaining_length = aligned_length; | |
1655 | region_address < low_address + aligned_length; | |
1656 | region_address += region_length, remaining_length -= region_length) | |
1657 | { | |
bb00b29d TG |
1658 | vm_region_submap_short_info_data_64_t info; |
1659 | mach_vm_address_t region_start = region_address; | |
a80b95ba | 1660 | mach_msg_type_number_t count; |
bb00b29d TG |
1661 | natural_t region_depth; |
1662 | ||
1663 | region_depth = 100000; | |
1664 | count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; | |
1665 | kret = mach_vm_region_recurse | |
1666 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
1667 | (vm_region_recurse_info_t) &info, &count); | |
1668 | ||
1669 | if (kret != KERN_SUCCESS) | |
a80b95ba | 1670 | { |
bb00b29d TG |
1671 | inferior_debug (1, _("darwin_read_write_inferior: " |
1672 | "mach_vm_region_recurse failed at %s: %s\n"), | |
1673 | core_addr_to_string (region_address), | |
1674 | mach_error_string (kret)); | |
a80b95ba TG |
1675 | goto out; |
1676 | } | |
1677 | ||
bb00b29d TG |
1678 | inferior_debug |
1679 | (9, _("darwin_read_write_inferior: " | |
1680 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
1681 | core_addr_to_string (region_address), | |
1682 | core_addr_to_string (region_start), | |
1683 | core_addr_to_string (region_length)); | |
1684 | ||
a80b95ba | 1685 | /* Check for holes in memory */ |
bb00b29d | 1686 | if (region_start > region_address) |
a80b95ba TG |
1687 | { |
1688 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), | |
a80b95ba | 1689 | core_addr_to_string (region_address), |
bb00b29d | 1690 | core_addr_to_string (region_start), |
a80b95ba TG |
1691 | (unsigned)region_length); |
1692 | length = 0; | |
1693 | goto out; | |
1694 | } | |
1695 | ||
bb00b29d TG |
1696 | /* Adjust the length. */ |
1697 | region_length -= (region_address - region_start); | |
1698 | ||
a80b95ba TG |
1699 | if (!(info.max_protection & VM_PROT_WRITE)) |
1700 | { | |
bb00b29d TG |
1701 | kret = mach_vm_protect |
1702 | (task, region_address, region_length, | |
1703 | TRUE, info.max_protection | VM_PROT_WRITE | VM_PROT_COPY); | |
1704 | if (kret != KERN_SUCCESS) | |
1705 | { | |
1706 | warning (_("darwin_read_write_inf: " | |
1707 | "mach_vm_protect max failed at %s: %s"), | |
1708 | core_addr_to_string (region_address), | |
1709 | mach_error_string (kret)); | |
1710 | length = 0; | |
1711 | goto out; | |
1712 | } | |
a80b95ba TG |
1713 | } |
1714 | ||
1715 | if (!(info.protection & VM_PROT_WRITE)) | |
1716 | { | |
bb00b29d | 1717 | kret = mach_vm_protect (task, region_address, region_length, |
a80b95ba | 1718 | FALSE, info.protection | VM_PROT_WRITE); |
bb00b29d | 1719 | if (kret != KERN_SUCCESS) |
a80b95ba | 1720 | { |
bb00b29d TG |
1721 | warning (_("darwin_read_write_inf: " |
1722 | "mach_vm_protect failed at %s (len=0x%lx): %s"), | |
1723 | core_addr_to_string (region_address), | |
1724 | (unsigned long)region_length, mach_error_string (kret)); | |
a80b95ba TG |
1725 | length = 0; |
1726 | goto out; | |
1727 | } | |
1728 | } | |
1729 | } | |
1730 | ||
bb00b29d | 1731 | kret = mach_vm_write (task, low_address, copied, aligned_length); |
a80b95ba | 1732 | |
bb00b29d | 1733 | if (kret != KERN_SUCCESS) |
a80b95ba TG |
1734 | { |
1735 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
bb00b29d | 1736 | mach_error_string (kret)); |
a80b95ba TG |
1737 | length = 0; |
1738 | } | |
1739 | out: | |
1740 | mach_vm_deallocate (mach_task_self (), copied, copy_count); | |
1741 | return length; | |
1742 | } | |
1743 | ||
1744 | \f | |
1745 | /* Return 0 on failure, number of bytes handled otherwise. TARGET | |
1746 | is ignored. */ | |
1747 | static int | |
1748 | darwin_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, | |
1749 | struct mem_attrib *attrib, struct target_ops *target) | |
1750 | { | |
bb00b29d TG |
1751 | struct inferior *inf = current_inferior (); |
1752 | task_t task = inf->private->task; | |
a80b95ba TG |
1753 | |
1754 | if (task == MACH_PORT_NULL) | |
1755 | return 0; | |
1756 | ||
1757 | inferior_debug (8, _("darwin_xfer_memory(%s, %d, %c)\n"), | |
1758 | core_addr_to_string (memaddr), len, write ? 'w' : 'r'); | |
1759 | ||
1760 | if (write) | |
1761 | return darwin_read_write_inferior (task, memaddr, NULL, myaddr, len); | |
1762 | else | |
1763 | return darwin_read_write_inferior (task, memaddr, myaddr, NULL, len); | |
1764 | } | |
1765 | ||
1766 | static LONGEST | |
1767 | darwin_xfer_partial (struct target_ops *ops, | |
1768 | enum target_object object, const char *annex, | |
1769 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
1770 | ULONGEST offset, LONGEST len) | |
1771 | { | |
bb00b29d TG |
1772 | struct inferior *inf = current_inferior (); |
1773 | ||
1774 | inferior_debug | |
854f4b0e TG |
1775 | (8, _("darwin_xfer_partial(%s, %d, rbuf=%s, wbuf=%s) pid=%u\n"), |
1776 | core_addr_to_string (offset), (int)len, | |
1777 | host_address_to_string (readbuf), host_address_to_string (writebuf), | |
1778 | inf->pid); | |
a80b95ba TG |
1779 | |
1780 | if (object != TARGET_OBJECT_MEMORY) | |
1781 | return -1; | |
1782 | ||
bb00b29d | 1783 | return darwin_read_write_inferior (inf->private->task, offset, |
a80b95ba TG |
1784 | readbuf, writebuf, len); |
1785 | } | |
1786 | ||
1787 | static void | |
1788 | set_enable_mach_exceptions (char *args, int from_tty, | |
1789 | struct cmd_list_element *c) | |
1790 | { | |
bb00b29d | 1791 | if (!ptid_equal (inferior_ptid, null_ptid)) |
a80b95ba | 1792 | { |
bb00b29d | 1793 | struct inferior *inf = current_inferior (); |
a80b95ba TG |
1794 | exception_mask_t mask; |
1795 | kern_return_t kret; | |
1796 | ||
1797 | if (enable_mach_exceptions) | |
1798 | mask = EXC_MASK_ALL; | |
1799 | else | |
1800 | { | |
bb00b29d TG |
1801 | darwin_restore_exception_ports (inf->private); |
1802 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
a80b95ba | 1803 | } |
bb00b29d | 1804 | kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port, |
a80b95ba TG |
1805 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
1806 | MACH_CHECK_ERROR (kret); | |
1807 | } | |
1808 | } | |
1809 | ||
bb00b29d TG |
1810 | static char * |
1811 | darwin_pid_to_exec_file (int pid) | |
1812 | { | |
1813 | char *path; | |
1814 | int res; | |
1815 | ||
1816 | path = xmalloc (MAXPATHLEN); | |
1817 | make_cleanup (xfree, path); | |
1818 | ||
1819 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, MAXPATHLEN); | |
1820 | if (res >= 0) | |
1821 | return path; | |
1822 | else | |
1823 | return NULL; | |
1824 | } | |
1825 | ||
1826 | static ptid_t | |
1827 | darwin_get_ada_task_ptid (long lwp, long thread) | |
1828 | { | |
1829 | int i; | |
1830 | darwin_thread_t *t; | |
1831 | int k; | |
1832 | struct inferior *inf = current_inferior (); | |
1833 | kern_return_t kret; | |
1834 | mach_port_name_array_t names; | |
1835 | mach_msg_type_number_t names_count; | |
1836 | mach_port_type_array_t types; | |
1837 | mach_msg_type_number_t types_count; | |
1838 | long res = 0; | |
1839 | ||
1840 | /* First linear search. */ | |
1841 | for (k = 0; | |
1842 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1843 | k++) | |
1844 | if (t->inf_port == lwp) | |
1845 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); | |
1846 | ||
1847 | /* Maybe the port was never extract. Do it now. */ | |
1848 | ||
1849 | /* First get inferior port names. */ | |
1850 | kret = mach_port_names (inf->private->task, &names, &names_count, &types, | |
1851 | &types_count); | |
1852 | MACH_CHECK_ERROR (kret); | |
1853 | if (kret != KERN_SUCCESS) | |
1854 | return null_ptid; | |
1855 | ||
1856 | /* For each name, copy the right in the gdb space and then compare with | |
1857 | our view of the inferior threads. We don't forget to deallocate the | |
1858 | right. */ | |
1859 | for (i = 0; i < names_count; i++) | |
1860 | { | |
1861 | mach_port_t local_name; | |
1862 | mach_msg_type_name_t local_type; | |
1863 | ||
1864 | /* We just need to know the corresponding name in gdb name space. | |
1865 | So extract and deallocate the right. */ | |
1866 | kret = mach_port_extract_right (inf->private->task, names[i], | |
1867 | MACH_MSG_TYPE_COPY_SEND, | |
1868 | &local_name, &local_type); | |
1869 | if (kret != KERN_SUCCESS) | |
1870 | continue; | |
1871 | mach_port_deallocate (gdb_task, local_name); | |
1872 | ||
1873 | for (k = 0; | |
1874 | VEC_iterate (darwin_thread_t, inf->private->threads, k, t); | |
1875 | k++) | |
1876 | if (t->gdb_port == local_name) | |
1877 | { | |
1878 | t->inf_port = names[i]; | |
1879 | if (names[i] == lwp) | |
1880 | res = t->gdb_port; | |
1881 | } | |
1882 | } | |
1883 | ||
1884 | vm_deallocate (gdb_task, (vm_address_t) names, | |
1885 | names_count * sizeof (mach_port_t)); | |
1886 | ||
1887 | if (res) | |
1888 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); | |
1889 | else | |
1890 | return null_ptid; | |
1891 | } | |
1892 | ||
1893 | static int | |
1894 | darwin_supports_multi_process (void) | |
1895 | { | |
1896 | return 1; | |
1897 | } | |
1898 | ||
a80b95ba | 1899 | void |
bb00b29d | 1900 | _initialize_darwin_inferior (void) |
a80b95ba TG |
1901 | { |
1902 | kern_return_t kret; | |
1903 | ||
a80b95ba TG |
1904 | gdb_task = mach_task_self (); |
1905 | darwin_host_self = mach_host_self (); | |
1906 | ||
1907 | /* Read page size. */ | |
1908 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
1909 | if (kret != KERN_SUCCESS) | |
1910 | { | |
1911 | mach_page_size = 0x1000; | |
1912 | MACH_CHECK_ERROR (kret); | |
1913 | } | |
1914 | ||
a80b95ba TG |
1915 | darwin_ops = inf_child_target (); |
1916 | ||
1917 | darwin_ops->to_shortname = "darwin-child"; | |
1918 | darwin_ops->to_longname = _("Darwin child process"); | |
1919 | darwin_ops->to_doc = | |
1920 | _("Darwin child process (started by the \"run\" command)."); | |
1921 | darwin_ops->to_create_inferior = darwin_create_inferior; | |
1922 | darwin_ops->to_attach = darwin_attach; | |
1923 | darwin_ops->to_attach_no_wait = 0; | |
1924 | darwin_ops->to_detach = darwin_detach; | |
1925 | darwin_ops->to_files_info = darwin_files_info; | |
bb00b29d | 1926 | darwin_ops->to_wait = darwin_wait_to; |
a80b95ba TG |
1927 | darwin_ops->to_mourn_inferior = darwin_mourn_inferior; |
1928 | darwin_ops->to_kill = darwin_kill_inferior; | |
1929 | darwin_ops->to_stop = darwin_stop; | |
bb00b29d | 1930 | darwin_ops->to_resume = darwin_resume_to; |
a80b95ba TG |
1931 | darwin_ops->to_thread_alive = darwin_thread_alive; |
1932 | darwin_ops->to_pid_to_str = darwin_pid_to_str; | |
bb00b29d | 1933 | darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file; |
a80b95ba TG |
1934 | darwin_ops->to_load = NULL; |
1935 | darwin_ops->deprecated_xfer_memory = darwin_xfer_memory; | |
1936 | darwin_ops->to_xfer_partial = darwin_xfer_partial; | |
bb00b29d TG |
1937 | darwin_ops->to_supports_multi_process = darwin_supports_multi_process; |
1938 | darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid; | |
a80b95ba TG |
1939 | |
1940 | darwin_complete_target (darwin_ops); | |
1941 | ||
1942 | add_target (darwin_ops); | |
1943 | ||
1944 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), mach_task_self (), | |
1945 | getpid ()); | |
1946 | ||
1947 | add_setshow_zinteger_cmd ("darwin", class_obscure, | |
1948 | &darwin_debug_flag, _("\ | |
1949 | Set if printing inferior communication debugging statements."), _("\ | |
1950 | Show if printing inferior communication debugging statements."), NULL, | |
1951 | NULL, NULL, | |
1952 | &setdebuglist, &showdebuglist); | |
1953 | ||
1954 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
1955 | &enable_mach_exceptions, _("\ | |
1956 | Set if mach exceptions are caught."), _("\ | |
1957 | Show if mach exceptions are caught."), _("\ | |
1958 | When this mode is on, all low level exceptions are reported before being\n\ | |
1959 | reported by the kernel."), | |
1960 | &set_enable_mach_exceptions, NULL, | |
1961 | &setlist, &showlist); | |
1962 | } |