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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
618f726f | 2 | Copyright (C) 2008-2016 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 | ||
bfedc46a | 86 | static void darwin_interrupt (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 | ||
82b19a4d TG |
117 | static void darwin_setup_request_notification (struct inferior *inf); |
118 | static void darwin_deallocate_exception_ports (darwin_inferior *inf); | |
119 | static void darwin_setup_exceptions (struct inferior *inf); | |
120 | static void darwin_deallocate_threads (struct inferior *inf); | |
121 | ||
a80b95ba TG |
122 | /* Target operations for Darwin. */ |
123 | static struct target_ops *darwin_ops; | |
124 | ||
125 | /* Task identifier of gdb. */ | |
126 | static task_t gdb_task; | |
127 | ||
128 | /* A copy of mach_host_self (). */ | |
129 | mach_port_t darwin_host_self; | |
130 | ||
131 | /* Exception port. */ | |
132 | mach_port_t darwin_ex_port; | |
133 | ||
a6290449 | 134 | /* Port set, to wait for answer on all ports. */ |
a80b95ba TG |
135 | mach_port_t darwin_port_set; |
136 | ||
0963b4bd | 137 | /* Page size. */ |
a80b95ba TG |
138 | static vm_size_t mach_page_size; |
139 | ||
140 | /* If Set, catch all mach exceptions (before they are converted to signals | |
141 | by the kernel). */ | |
142 | static int enable_mach_exceptions; | |
143 | ||
bb00b29d TG |
144 | /* Inferior that should report a fake stop event. */ |
145 | static struct inferior *darwin_inf_fake_stop; | |
146 | ||
a80b95ba TG |
147 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
148 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
149 | ||
bb00b29d | 150 | /* This controls output of inferior debugging. */ |
ccce17b0 | 151 | static unsigned int darwin_debug_flag = 0; |
a80b95ba | 152 | |
15c19d39 TG |
153 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
154 | be signed. This is required to get an authorization for task_for_pid. | |
155 | ||
a6290449 TG |
156 | Once gdb is built, you must codesign it with any system-trusted signing |
157 | authority. See taskgated(8) for details. */ | |
15c19d39 TG |
158 | static const unsigned char info_plist[] |
159 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
160 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
161 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
162 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
163 | "<plist version=\"1.0\">\n" | |
164 | "<dict>\n" | |
165 | " <key>CFBundleIdentifier</key>\n" | |
166 | " <string>org.gnu.gdb</string>\n" | |
167 | " <key>CFBundleName</key>\n" | |
168 | " <string>gdb</string>\n" | |
169 | " <key>CFBundleVersion</key>\n" | |
170 | " <string>1.0</string>\n" | |
171 | " <key>SecTaskAccess</key>\n" | |
172 | " <array>\n" | |
173 | " <string>allowed</string>\n" | |
174 | " <string>debug</string>\n" | |
175 | " </array>\n" | |
176 | "</dict>\n" | |
177 | "</plist>\n"; | |
178 | ||
77b64a49 PA |
179 | static void inferior_debug (int level, const char *fmt, ...) |
180 | ATTRIBUTE_PRINTF (2, 3); | |
181 | ||
a80b95ba TG |
182 | static void |
183 | inferior_debug (int level, const char *fmt, ...) | |
184 | { | |
185 | va_list ap; | |
186 | ||
187 | if (darwin_debug_flag < level) | |
188 | return; | |
189 | ||
190 | va_start (ap, fmt); | |
191 | printf_unfiltered (_("[%d inferior]: "), getpid ()); | |
192 | vprintf_unfiltered (fmt, ap); | |
193 | va_end (ap); | |
194 | } | |
195 | ||
196 | void | |
197 | mach_check_error (kern_return_t ret, const char *file, | |
198 | unsigned int line, const char *func) | |
199 | { | |
200 | if (ret == KERN_SUCCESS) | |
201 | return; | |
202 | if (func == NULL) | |
203 | func = _("[UNKNOWN]"); | |
bb00b29d | 204 | |
4f1cdeec | 205 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 206 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
207 | } |
208 | ||
209 | static const char * | |
210 | unparse_exception_type (unsigned int i) | |
211 | { | |
212 | static char unknown_exception_buf[32]; | |
213 | ||
214 | switch (i) | |
215 | { | |
216 | case EXC_BAD_ACCESS: | |
217 | return "EXC_BAD_ACCESS"; | |
218 | case EXC_BAD_INSTRUCTION: | |
219 | return "EXC_BAD_INSTRUCTION"; | |
220 | case EXC_ARITHMETIC: | |
221 | return "EXC_ARITHMETIC"; | |
222 | case EXC_EMULATION: | |
223 | return "EXC_EMULATION"; | |
224 | case EXC_SOFTWARE: | |
225 | return "EXC_SOFTWARE"; | |
226 | case EXC_BREAKPOINT: | |
227 | return "EXC_BREAKPOINT"; | |
228 | case EXC_SYSCALL: | |
229 | return "EXC_SYSCALL"; | |
230 | case EXC_MACH_SYSCALL: | |
231 | return "EXC_MACH_SYSCALL"; | |
232 | case EXC_RPC_ALERT: | |
233 | return "EXC_RPC_ALERT"; | |
234 | case EXC_CRASH: | |
235 | return "EXC_CRASH"; | |
236 | default: | |
237 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
238 | return unknown_exception_buf; | |
239 | } | |
240 | } | |
241 | ||
a7aa0d73 JB |
242 | /* Set errno to zero, and then call ptrace with the given arguments. |
243 | If inferior debugging traces are on, then also print a debug | |
244 | trace. | |
245 | ||
246 | The returned value is the same as the value returned by ptrace, | |
247 | except in the case where that value is -1 but errno is zero. | |
248 | This case is documented to be a non-error situation, so we | |
249 | return zero in that case. */ | |
250 | ||
a80b95ba TG |
251 | static int |
252 | darwin_ptrace (const char *name, | |
aa14fb50 | 253 | int request, int pid, caddr_t arg3, int arg4) |
a80b95ba TG |
254 | { |
255 | int ret; | |
256 | ||
a7aa0d73 | 257 | errno = 0; |
aa14fb50 | 258 | ret = ptrace (request, pid, arg3, arg4); |
a7aa0d73 JB |
259 | if (ret == -1 && errno == 0) |
260 | ret = 0; | |
a80b95ba | 261 | |
3eb831e0 TG |
262 | inferior_debug (4, _("ptrace (%s, %d, 0x%lx, %d): %d (%s)\n"), |
263 | name, pid, (unsigned long) arg3, arg4, ret, | |
a3224241 | 264 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
265 | return ret; |
266 | } | |
267 | ||
268 | static int | |
269 | cmp_thread_t (const void *l, const void *r) | |
270 | { | |
bb00b29d TG |
271 | thread_t tl = *(const thread_t *)l; |
272 | thread_t tr = *(const thread_t *)r; | |
273 | return (int)(tl - tr); | |
a80b95ba TG |
274 | } |
275 | ||
276 | static void | |
bb00b29d | 277 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
278 | { |
279 | kern_return_t kret; | |
280 | unsigned int i; | |
281 | thread_array_t thread_list; | |
282 | unsigned int new_nbr; | |
283 | unsigned int old_nbr; | |
284 | unsigned int new_ix, old_ix; | |
fe978cb0 | 285 | darwin_inferior *darwin_inf = inf->priv; |
bb00b29d | 286 | VEC (darwin_thread_t) *thread_vec; |
a80b95ba TG |
287 | |
288 | /* Get list of threads. */ | |
bb00b29d | 289 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
290 | MACH_CHECK_ERROR (kret); |
291 | if (kret != KERN_SUCCESS) | |
292 | return; | |
293 | ||
bb00b29d | 294 | /* Sort the list. */ |
a80b95ba TG |
295 | if (new_nbr > 1) |
296 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
297 | ||
bb00b29d TG |
298 | if (darwin_inf->threads) |
299 | old_nbr = VEC_length (darwin_thread_t, darwin_inf->threads); | |
a80b95ba TG |
300 | else |
301 | old_nbr = 0; | |
302 | ||
bb00b29d TG |
303 | /* Quick check for no changes. */ |
304 | if (old_nbr == new_nbr) | |
305 | { | |
306 | for (i = 0; i < new_nbr; i++) | |
307 | if (thread_list[i] | |
308 | != VEC_index (darwin_thread_t, darwin_inf->threads, i)->gdb_port) | |
309 | break; | |
310 | if (i == new_nbr) | |
311 | { | |
15a9128a TG |
312 | /* Deallocate ports. */ |
313 | for (i = 0; i < new_nbr; i++) | |
314 | { | |
315 | kret = mach_port_deallocate (mach_task_self (), thread_list[i]); | |
316 | MACH_CHECK_ERROR (kret); | |
317 | } | |
318 | ||
319 | /* Deallocate the buffer. */ | |
bb00b29d TG |
320 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
321 | new_nbr * sizeof (int)); | |
322 | MACH_CHECK_ERROR (kret); | |
15a9128a | 323 | |
bb00b29d TG |
324 | return; |
325 | } | |
326 | } | |
327 | ||
82b19a4d | 328 | /* Full handling: detect new threads, remove dead threads. */ |
bb00b29d TG |
329 | thread_vec = VEC_alloc (darwin_thread_t, new_nbr); |
330 | ||
a80b95ba TG |
331 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
332 | { | |
333 | thread_t new_id = (new_ix < new_nbr) ? | |
334 | thread_list[new_ix] : THREAD_NULL; | |
bb00b29d TG |
335 | darwin_thread_t *old = (old_ix < old_nbr) ? |
336 | VEC_index (darwin_thread_t, darwin_inf->threads, old_ix) : NULL; | |
337 | thread_t old_id = old ? old->gdb_port : THREAD_NULL; | |
338 | ||
339 | inferior_debug | |
c8c9911f | 340 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"), |
bb00b29d | 341 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
a80b95ba TG |
342 | |
343 | if (old_id == new_id) | |
344 | { | |
345 | /* Thread still exist. */ | |
bb00b29d | 346 | VEC_safe_push (darwin_thread_t, thread_vec, old); |
a80b95ba TG |
347 | new_ix++; |
348 | old_ix++; | |
349 | ||
15a9128a TG |
350 | /* Deallocate the port. */ |
351 | kret = mach_port_deallocate (gdb_task, new_id); | |
a80b95ba | 352 | MACH_CHECK_ERROR (kret); |
15a9128a | 353 | |
a80b95ba TG |
354 | continue; |
355 | } | |
bb00b29d TG |
356 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
357 | { | |
358 | /* Ignore dead ports. | |
359 | In some weird cases, we might get dead ports. They should | |
360 | correspond to dead thread so they could safely be ignored. */ | |
361 | new_ix++; | |
362 | continue; | |
363 | } | |
364 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
365 | { |
366 | /* A thread was created. */ | |
367 | struct thread_info *tp; | |
bb00b29d | 368 | struct private_thread_info *pti; |
a80b95ba | 369 | |
41bf6aca | 370 | pti = XCNEW (struct private_thread_info); |
bb00b29d TG |
371 | pti->gdb_port = new_id; |
372 | pti->msg_state = DARWIN_RUNNING; | |
373 | ||
82b19a4d | 374 | if (old_nbr == 0 && new_ix == 0) |
bb00b29d | 375 | { |
82b19a4d TG |
376 | /* A ptid is create when the inferior is started (see |
377 | fork-child.c) with lwp=tid=0. This ptid will be renamed | |
378 | later by darwin_init_thread_list (). */ | |
bb00b29d TG |
379 | tp = find_thread_ptid (ptid_build (inf->pid, 0, 0)); |
380 | gdb_assert (tp); | |
82b19a4d | 381 | gdb_assert (tp->priv == NULL); |
fe978cb0 | 382 | tp->priv = pti; |
bb00b29d | 383 | } |
82b19a4d TG |
384 | else |
385 | { | |
386 | /* Add the new thread. */ | |
387 | tp = add_thread_with_info | |
388 | (ptid_build (inf->pid, 0, new_id), pti); | |
389 | } | |
bb00b29d | 390 | VEC_safe_push (darwin_thread_t, thread_vec, pti); |
a80b95ba TG |
391 | new_ix++; |
392 | continue; | |
393 | } | |
bb00b29d | 394 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
395 | { |
396 | /* A thread was removed. */ | |
397 | delete_thread (ptid_build (inf->pid, 0, old_id)); | |
398 | kret = mach_port_deallocate (gdb_task, old_id); | |
399 | MACH_CHECK_ERROR (kret); | |
400 | old_ix++; | |
bb00b29d | 401 | continue; |
a80b95ba | 402 | } |
f3574227 | 403 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
404 | } |
405 | ||
bb00b29d TG |
406 | if (darwin_inf->threads) |
407 | VEC_free (darwin_thread_t, darwin_inf->threads); | |
408 | darwin_inf->threads = thread_vec; | |
a80b95ba | 409 | |
15a9128a | 410 | /* Deallocate the buffer. */ |
a80b95ba TG |
411 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
412 | new_nbr * sizeof (int)); | |
413 | MACH_CHECK_ERROR (kret); | |
414 | } | |
415 | ||
bb00b29d TG |
416 | static int |
417 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 418 | { |
82b19a4d | 419 | return inf->priv->task == *(task_t *)port_ptr; |
bb00b29d | 420 | } |
a80b95ba | 421 | |
bb00b29d | 422 | static int |
82b19a4d | 423 | find_inferior_pid_it (struct inferior *inf, void *pid_ptr) |
bb00b29d | 424 | { |
82b19a4d | 425 | return inf->pid == *(int *)pid_ptr; |
a80b95ba TG |
426 | } |
427 | ||
bb00b29d TG |
428 | /* Return an inferior by task port. */ |
429 | static struct inferior * | |
430 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 431 | { |
bb00b29d TG |
432 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
433 | } | |
a80b95ba | 434 | |
82b19a4d | 435 | /* Return an inferior by pid port. */ |
bb00b29d | 436 | static struct inferior * |
82b19a4d | 437 | darwin_find_inferior_by_pid (int pid) |
bb00b29d | 438 | { |
82b19a4d | 439 | return iterate_over_inferiors (&find_inferior_pid_it, &pid); |
bb00b29d | 440 | } |
a80b95ba | 441 | |
bb00b29d TG |
442 | /* Return a thread by port. */ |
443 | static darwin_thread_t * | |
444 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
445 | { | |
446 | darwin_thread_t *t; | |
447 | int k; | |
448 | ||
449 | for (k = 0; | |
fe978cb0 | 450 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
451 | k++) |
452 | if (t->gdb_port == thread) | |
453 | return t; | |
454 | return NULL; | |
455 | } | |
a80b95ba | 456 | |
bb00b29d | 457 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 458 | |
bb00b29d TG |
459 | static void |
460 | darwin_suspend_inferior (struct inferior *inf) | |
461 | { | |
fe978cb0 | 462 | if (!inf->priv->suspended) |
a80b95ba | 463 | { |
bb00b29d | 464 | kern_return_t kret; |
a80b95ba | 465 | |
fe978cb0 | 466 | kret = task_suspend (inf->priv->task); |
bb00b29d | 467 | MACH_CHECK_ERROR (kret); |
a80b95ba | 468 | |
fe978cb0 | 469 | inf->priv->suspended = 1; |
bb00b29d TG |
470 | } |
471 | } | |
a80b95ba | 472 | |
bb00b29d | 473 | /* Resume an inferior at Mach level. */ |
a80b95ba | 474 | |
bb00b29d TG |
475 | static void |
476 | darwin_resume_inferior (struct inferior *inf) | |
477 | { | |
fe978cb0 | 478 | if (inf->priv->suspended) |
bb00b29d TG |
479 | { |
480 | kern_return_t kret; | |
a80b95ba | 481 | |
fe978cb0 | 482 | kret = task_resume (inf->priv->task); |
bb00b29d TG |
483 | MACH_CHECK_ERROR (kret); |
484 | ||
fe978cb0 | 485 | inf->priv->suspended = 0; |
a80b95ba TG |
486 | } |
487 | } | |
488 | ||
bb00b29d TG |
489 | /* Iterator functions. */ |
490 | ||
491 | static int | |
492 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 493 | { |
bb00b29d TG |
494 | darwin_suspend_inferior (inf); |
495 | darwin_check_new_threads (inf); | |
496 | return 0; | |
497 | } | |
498 | ||
499 | static int | |
500 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
501 | { | |
502 | darwin_resume_inferior (inf); | |
503 | return 0; | |
a80b95ba TG |
504 | } |
505 | ||
bb00b29d TG |
506 | static void |
507 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
508 | { | |
509 | printf_unfiltered (_("message header:\n")); | |
510 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
511 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
512 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
513 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
514 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
515 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
516 | ||
517 | if (disp_body) | |
518 | { | |
519 | const unsigned char *data; | |
a6290449 | 520 | const unsigned int *ldata; |
bb00b29d TG |
521 | int size; |
522 | int i; | |
523 | ||
524 | data = (unsigned char *)(hdr + 1); | |
525 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
526 | ||
527 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
528 | { | |
529 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
530 | mach_msg_port_descriptor_t *desc = | |
531 | (mach_msg_port_descriptor_t *)(bod + 1); | |
532 | int k; | |
533 | NDR_record_t *ndr; | |
534 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
535 | bod->msgh_descriptor_count); | |
536 | data += sizeof (mach_msg_body_t); | |
537 | size -= sizeof (mach_msg_body_t); | |
538 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
539 | switch (desc[k].type) | |
540 | { | |
541 | case MACH_MSG_PORT_DESCRIPTOR: | |
542 | printf_unfiltered | |
543 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
544 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
545 | break; | |
546 | default: | |
547 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
548 | k, desc[k].type); | |
549 | break; | |
550 | } | |
551 | data += bod->msgh_descriptor_count | |
552 | * sizeof (mach_msg_port_descriptor_t); | |
553 | size -= bod->msgh_descriptor_count | |
554 | * sizeof (mach_msg_port_descriptor_t); | |
555 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
556 | printf_unfiltered | |
557 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
558 | "int=%02x char=%02x float=%02x\n"), | |
559 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
560 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
561 | data += sizeof (NDR_record_t); | |
562 | size -= sizeof (NDR_record_t); | |
563 | } | |
564 | ||
565 | printf_unfiltered (_(" data:")); | |
a6290449 TG |
566 | ldata = (const unsigned int *)data; |
567 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
568 | printf_unfiltered (" %08x", ldata[i]); | |
bb00b29d TG |
569 | printf_unfiltered (_("\n")); |
570 | } | |
571 | } | |
572 | ||
82b19a4d TG |
573 | /* Adjust inferior data when a new task was created. */ |
574 | ||
575 | static struct inferior * | |
576 | darwin_find_new_inferior (task_t task_port, thread_t thread_port) | |
577 | { | |
578 | int task_pid; | |
579 | struct inferior *inf; | |
580 | kern_return_t kret; | |
581 | mach_port_t prev; | |
582 | ||
583 | /* Find the corresponding pid. */ | |
584 | kret = pid_for_task (task_port, &task_pid); | |
585 | if (kret != KERN_SUCCESS) | |
586 | { | |
587 | MACH_CHECK_ERROR (kret); | |
588 | return NULL; | |
589 | } | |
590 | ||
591 | /* Find the inferior for this pid. */ | |
592 | inf = darwin_find_inferior_by_pid (task_pid); | |
593 | if (inf == NULL) | |
594 | return NULL; | |
595 | ||
596 | /* Deallocate saved exception ports. */ | |
597 | darwin_deallocate_exception_ports (inf->priv); | |
598 | ||
599 | /* No need to remove dead_name notification, but still... */ | |
600 | kret = mach_port_request_notification (gdb_task, inf->priv->task, | |
601 | MACH_NOTIFY_DEAD_NAME, 0, | |
602 | MACH_PORT_NULL, | |
603 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
604 | &prev); | |
605 | if (kret != KERN_INVALID_ARGUMENT) | |
606 | MACH_CHECK_ERROR (kret); | |
607 | ||
608 | /* Replace old task port. */ | |
609 | kret = mach_port_deallocate (gdb_task, inf->priv->task); | |
610 | MACH_CHECK_ERROR (kret); | |
611 | inf->priv->task = task_port; | |
612 | ||
613 | darwin_setup_request_notification (inf); | |
614 | darwin_setup_exceptions (inf); | |
615 | ||
616 | return inf; | |
617 | } | |
618 | ||
619 | /* Check data representation. */ | |
620 | ||
621 | static int | |
622 | darwin_check_message_ndr (NDR_record_t *ndr) | |
623 | { | |
624 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
625 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
626 | || ndr->mig_encoding != NDR_record.mig_encoding | |
627 | || ndr->int_rep != NDR_record.int_rep | |
628 | || ndr->char_rep != NDR_record.char_rep | |
629 | || ndr->float_rep != NDR_record.float_rep) | |
630 | return -1; | |
631 | return 0; | |
632 | } | |
633 | ||
634 | /* Decode an exception message. */ | |
635 | ||
bb00b29d TG |
636 | static int |
637 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
638 | struct inferior **pinf, | |
639 | darwin_thread_t **pthread) | |
a80b95ba | 640 | { |
bb00b29d TG |
641 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
642 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
643 | NDR_record_t *ndr; | |
644 | integer_t *data; | |
645 | struct inferior *inf; | |
646 | darwin_thread_t *thread; | |
647 | task_t task_port; | |
648 | thread_t thread_port; | |
a80b95ba | 649 | kern_return_t kret; |
bb00b29d | 650 | int i; |
a80b95ba | 651 | |
a41f2563 TG |
652 | /* Check message destination. */ |
653 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
654 | return -1; |
655 | ||
656 | /* Check message header. */ | |
657 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
658 | return -1; | |
659 | ||
660 | /* Check descriptors. */ | |
661 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
662 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
663 | || bod->msgh_descriptor_count != 2 | |
664 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
665 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
666 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
667 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
668 | return -1; | |
669 | ||
670 | /* Check data representation. */ | |
671 | ndr = (NDR_record_t *)(desc + 2); | |
82b19a4d | 672 | if (darwin_check_message_ndr (ndr) != 0) |
bb00b29d TG |
673 | return -1; |
674 | ||
675 | /* Ok, the hard work. */ | |
676 | data = (integer_t *)(ndr + 1); | |
677 | ||
bb00b29d TG |
678 | task_port = desc[1].name; |
679 | thread_port = desc[0].name; | |
a41f2563 | 680 | |
a41f2563 | 681 | /* Find process by port. */ |
bb00b29d | 682 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 683 | *pinf = inf; |
82b19a4d TG |
684 | |
685 | if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2 | |
686 | && data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP) | |
687 | { | |
688 | /* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0, | |
689 | as a new Mach task is created when a process exec. */ | |
690 | inf = darwin_find_new_inferior (task_port, thread_port); | |
691 | *pinf = inf; | |
692 | ||
693 | if (inf == NULL) | |
694 | { | |
695 | /* Deallocate task_port, unless it was saved. */ | |
696 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
697 | MACH_CHECK_ERROR (kret); | |
698 | } | |
699 | } | |
700 | else | |
701 | { | |
702 | /* We got new rights to the task, get rid of it. Do not get rid of | |
703 | thread right, as we will need it to find the thread. */ | |
704 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
705 | MACH_CHECK_ERROR (kret); | |
706 | } | |
707 | ||
a41f2563 TG |
708 | if (inf == NULL) |
709 | { | |
710 | /* Not a known inferior. This could happen if the child fork, as | |
711 | the created process will inherit its exception port. | |
712 | FIXME: should the exception port be restored ? */ | |
713 | kern_return_t kret; | |
714 | mig_reply_error_t reply; | |
715 | ||
82b19a4d TG |
716 | inferior_debug |
717 | (4, _("darwin_decode_exception_message: unknown task 0x%x\n"), | |
718 | task_port); | |
719 | ||
15a9128a TG |
720 | /* Free thread port (we don't know it). */ |
721 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
722 | MACH_CHECK_ERROR (kret); | |
723 | ||
a41f2563 TG |
724 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); |
725 | ||
726 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
727 | reply.Head.msgh_size, 0, | |
728 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
729 | MACH_PORT_NULL); | |
730 | MACH_CHECK_ERROR (kret); | |
731 | ||
732 | return 0; | |
733 | } | |
bb00b29d TG |
734 | |
735 | /* Find thread by port. */ | |
736 | /* Check for new threads. Do it early so that the port in the exception | |
737 | message can be deallocated. */ | |
738 | darwin_check_new_threads (inf); | |
739 | ||
15a9128a TG |
740 | /* Free the thread port (as gdb knows the thread, it has already has a right |
741 | for it, so this just decrement a reference counter). */ | |
742 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
743 | MACH_CHECK_ERROR (kret); | |
744 | ||
bb00b29d TG |
745 | thread = darwin_find_thread (inf, thread_port); |
746 | if (thread == NULL) | |
747 | return -1; | |
748 | *pthread = thread; | |
749 | ||
a6290449 TG |
750 | /* The thread should be running. However we have observed cases where a |
751 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
752 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
753 | ||
bb00b29d | 754 | /* Finish decoding. */ |
bb00b29d TG |
755 | thread->event.header = *hdr; |
756 | thread->event.thread_port = thread_port; | |
757 | thread->event.task_port = task_port; | |
758 | thread->event.ex_type = data[0]; | |
759 | thread->event.data_count = data[1]; | |
760 | ||
761 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
762 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
763 | + data[1] * sizeof (integer_t))) | |
764 | return -1; | |
765 | for (i = 0; i < data[1]; i++) | |
766 | thread->event.ex_data[i] = data[2 + i]; | |
767 | ||
768 | thread->msg_state = DARWIN_MESSAGE; | |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
82b19a4d TG |
773 | /* Decode dead_name notify message. */ |
774 | ||
775 | static int | |
776 | darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf) | |
777 | { | |
778 | NDR_record_t *ndr = (NDR_record_t *)(hdr + 1); | |
779 | integer_t *data = (integer_t *)(ndr + 1); | |
780 | struct inferior *inf; | |
781 | darwin_thread_t *thread; | |
782 | task_t task_port; | |
783 | thread_t thread_port; | |
784 | kern_return_t kret; | |
785 | int i; | |
786 | ||
787 | /* Check message header. */ | |
788 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
789 | return -1; | |
790 | ||
791 | /* Check descriptors. */ | |
792 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t))) | |
793 | return -2; | |
794 | ||
795 | /* Check data representation. */ | |
796 | if (darwin_check_message_ndr (ndr) != 0) | |
797 | return -3; | |
798 | ||
799 | task_port = data[0]; | |
800 | ||
801 | /* Find process by port. */ | |
802 | inf = darwin_find_inferior_by_task (task_port); | |
803 | *pinf = inf; | |
804 | ||
805 | /* Check message destination. */ | |
806 | if (inf != NULL && hdr->msgh_local_port != inf->priv->notify_port) | |
807 | return -4; | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
bb00b29d TG |
812 | static void |
813 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
814 | integer_t code) | |
815 | { | |
816 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
817 | |
818 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 819 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 820 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
821 | rh->msgh_local_port = MACH_PORT_NULL; |
822 | rh->msgh_id = hdr->msgh_id + 100; | |
823 | ||
824 | reply->NDR = NDR_record; | |
825 | reply->RetCode = code; | |
a80b95ba TG |
826 | } |
827 | ||
bb00b29d TG |
828 | static void |
829 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
830 | { |
831 | kern_return_t kret; | |
bb00b29d | 832 | mig_reply_error_t reply; |
a80b95ba | 833 | |
bb00b29d TG |
834 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
835 | ||
836 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
837 | reply.Head.msgh_size, 0, | |
838 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
839 | MACH_PORT_NULL); | |
a80b95ba TG |
840 | MACH_CHECK_ERROR (kret); |
841 | ||
fe978cb0 | 842 | inf->priv->pending_messages--; |
bb00b29d TG |
843 | } |
844 | ||
845 | static void | |
846 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
847 | int step, int nsignal) | |
848 | { | |
849 | kern_return_t kret; | |
850 | int res; | |
851 | ||
a80b95ba | 852 | inferior_debug |
bb00b29d TG |
853 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
854 | thread->msg_state, thread->gdb_port, step, nsignal); | |
855 | ||
856 | switch (thread->msg_state) | |
a80b95ba | 857 | { |
bb00b29d TG |
858 | case DARWIN_MESSAGE: |
859 | if (thread->event.ex_type == EXC_SOFTWARE | |
860 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
861 | { | |
862 | /* Either deliver a new signal or cancel the signal received. */ | |
863 | res = PTRACE (PT_THUPDATE, inf->pid, | |
597e448c | 864 | (caddr_t) (uintptr_t) thread->gdb_port, nsignal); |
bb00b29d TG |
865 | if (res < 0) |
866 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
867 | } | |
868 | else if (nsignal) | |
869 | { | |
870 | /* Note: ptrace is allowed only if the process is stopped. | |
871 | Directly send the signal to the thread. */ | |
872 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
873 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), | |
874 | thread->gdb_port, nsignal, res); | |
875 | thread->signaled = 1; | |
876 | } | |
877 | ||
d987a266 | 878 | /* Set or reset single step. */ |
aa14fb50 TG |
879 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
880 | thread->gdb_port, step); | |
881 | darwin_set_sstep (thread->gdb_port, step); | |
882 | thread->single_step = step; | |
bb00b29d TG |
883 | |
884 | darwin_send_reply (inf, thread); | |
885 | thread->msg_state = DARWIN_RUNNING; | |
886 | break; | |
887 | ||
888 | case DARWIN_RUNNING: | |
889 | break; | |
890 | ||
891 | case DARWIN_STOPPED: | |
892 | kret = thread_resume (thread->gdb_port); | |
893 | MACH_CHECK_ERROR (kret); | |
894 | ||
895 | thread->msg_state = DARWIN_RUNNING; | |
896 | break; | |
a80b95ba | 897 | } |
bb00b29d | 898 | } |
a80b95ba | 899 | |
bb00b29d | 900 | /* Resume all threads of the inferior. */ |
a80b95ba | 901 | |
bb00b29d TG |
902 | static void |
903 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
904 | { | |
905 | darwin_thread_t *thread; | |
906 | int k; | |
907 | ||
908 | for (k = 0; | |
fe978cb0 | 909 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, thread); |
bb00b29d TG |
910 | k++) |
911 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
912 | } |
913 | ||
bb00b29d | 914 | struct resume_inferior_threads_param |
a80b95ba | 915 | { |
bb00b29d TG |
916 | int step; |
917 | int nsignal; | |
918 | }; | |
919 | ||
920 | static int | |
921 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
922 | { | |
923 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
924 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
925 | ||
926 | darwin_resume_inferior_threads (inf, step, nsignal); | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
931 | /* Suspend all threads of INF. */ | |
932 | ||
933 | static void | |
934 | darwin_suspend_inferior_threads (struct inferior *inf) | |
935 | { | |
936 | darwin_thread_t *thread; | |
a80b95ba | 937 | kern_return_t kret; |
bb00b29d TG |
938 | int k; |
939 | ||
940 | for (k = 0; | |
fe978cb0 | 941 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, thread); |
bb00b29d TG |
942 | k++) |
943 | switch (thread->msg_state) | |
944 | { | |
945 | case DARWIN_STOPPED: | |
946 | case DARWIN_MESSAGE: | |
947 | break; | |
948 | case DARWIN_RUNNING: | |
949 | kret = thread_suspend (thread->gdb_port); | |
950 | MACH_CHECK_ERROR (kret); | |
951 | thread->msg_state = DARWIN_STOPPED; | |
952 | break; | |
953 | } | |
954 | } | |
a80b95ba | 955 | |
bb00b29d | 956 | static void |
2ea28649 | 957 | darwin_resume (ptid_t ptid, int step, enum gdb_signal signal) |
bb00b29d TG |
958 | { |
959 | struct target_waitstatus status; | |
960 | int pid; | |
a80b95ba | 961 | |
bb00b29d TG |
962 | kern_return_t kret; |
963 | int res; | |
964 | int nsignal; | |
965 | struct inferior *inf; | |
a80b95ba | 966 | |
bb00b29d | 967 | inferior_debug |
3eb831e0 | 968 | (2, _("darwin_resume: pid=%d, tid=0x%lx, step=%d, signal=%d\n"), |
bb00b29d TG |
969 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); |
970 | ||
a493e3e2 | 971 | if (signal == GDB_SIGNAL_0) |
bb00b29d TG |
972 | nsignal = 0; |
973 | else | |
2ea28649 | 974 | nsignal = gdb_signal_to_host (signal); |
a80b95ba | 975 | |
bb00b29d TG |
976 | /* Don't try to single step all threads. */ |
977 | if (step) | |
978 | ptid = inferior_ptid; | |
979 | ||
980 | /* minus_one_ptid is RESUME_ALL. */ | |
981 | if (ptid_equal (ptid, minus_one_ptid)) | |
a80b95ba | 982 | { |
bb00b29d TG |
983 | struct resume_inferior_threads_param param; |
984 | ||
985 | param.nsignal = nsignal; | |
986 | param.step = step; | |
a80b95ba | 987 | |
bb00b29d TG |
988 | /* Resume threads. */ |
989 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
990 | /* Resume tasks. */ | |
991 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
992 | } | |
993 | else | |
a80b95ba | 994 | { |
c9657e70 | 995 | struct inferior *inf = find_inferior_ptid (ptid); |
bb00b29d TG |
996 | long tid = ptid_get_tid (ptid); |
997 | ||
998 | /* Stop the inferior (should be useless). */ | |
999 | darwin_suspend_inferior (inf); | |
1000 | ||
1001 | if (tid == 0) | |
1002 | darwin_resume_inferior_threads (inf, step, nsignal); | |
1003 | else | |
1004 | { | |
1005 | darwin_thread_t *thread; | |
1006 | ||
1007 | /* Suspend threads of the task. */ | |
1008 | darwin_suspend_inferior_threads (inf); | |
1009 | ||
1010 | /* Resume the selected thread. */ | |
1011 | thread = darwin_find_thread (inf, tid); | |
1012 | gdb_assert (thread); | |
1013 | darwin_resume_thread (inf, thread, step, nsignal); | |
1014 | } | |
1015 | ||
1016 | /* Resume the task. */ | |
1017 | darwin_resume_inferior (inf); | |
a80b95ba | 1018 | } |
bb00b29d | 1019 | } |
a80b95ba | 1020 | |
bb00b29d TG |
1021 | static void |
1022 | darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 1023 | enum gdb_signal signal) |
bb00b29d TG |
1024 | { |
1025 | return darwin_resume (ptid, step, signal); | |
1026 | } | |
1027 | ||
1028 | static ptid_t | |
1029 | darwin_decode_message (mach_msg_header_t *hdr, | |
1030 | darwin_thread_t **pthread, | |
1031 | struct inferior **pinf, | |
1032 | struct target_waitstatus *status) | |
1033 | { | |
1034 | darwin_thread_t *thread; | |
1035 | struct inferior *inf; | |
a80b95ba | 1036 | |
a41f2563 TG |
1037 | /* Exception message. 2401 == 0x961 is exc. */ |
1038 | if (hdr->msgh_id == 2401) | |
a80b95ba | 1039 | { |
bb00b29d TG |
1040 | int res; |
1041 | ||
1042 | /* Decode message. */ | |
1043 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
1044 | ||
1045 | if (res < 0) | |
a80b95ba | 1046 | { |
bb00b29d | 1047 | /* Should not happen... */ |
c8c9911f JB |
1048 | printf_unfiltered |
1049 | (_("darwin_wait: ill-formatted message (id=0x%x)\n"), hdr->msgh_id); | |
bb00b29d | 1050 | /* FIXME: send a failure reply? */ |
a41f2563 TG |
1051 | status->kind = TARGET_WAITKIND_IGNORE; |
1052 | return minus_one_ptid; | |
1053 | } | |
1054 | if (inf == NULL) | |
1055 | { | |
1056 | status->kind = TARGET_WAITKIND_IGNORE; | |
a80b95ba TG |
1057 | return minus_one_ptid; |
1058 | } | |
bb00b29d TG |
1059 | *pinf = inf; |
1060 | *pthread = thread; | |
fe978cb0 | 1061 | inf->priv->pending_messages++; |
a80b95ba TG |
1062 | |
1063 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
1064 | thread->msg_state = DARWIN_MESSAGE; |
1065 | ||
c8c9911f | 1066 | inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"), |
bb00b29d TG |
1067 | thread->gdb_port, |
1068 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 1069 | |
bb00b29d | 1070 | switch (thread->event.ex_type) |
a80b95ba TG |
1071 | { |
1072 | case EXC_BAD_ACCESS: | |
4e225075 | 1073 | status->value.sig = GDB_EXC_BAD_ACCESS; |
a80b95ba TG |
1074 | break; |
1075 | case EXC_BAD_INSTRUCTION: | |
4e225075 | 1076 | status->value.sig = GDB_EXC_BAD_INSTRUCTION; |
a80b95ba TG |
1077 | break; |
1078 | case EXC_ARITHMETIC: | |
4e225075 | 1079 | status->value.sig = GDB_EXC_ARITHMETIC; |
a80b95ba TG |
1080 | break; |
1081 | case EXC_EMULATION: | |
4e225075 | 1082 | status->value.sig = GDB_EXC_EMULATION; |
a80b95ba TG |
1083 | break; |
1084 | case EXC_SOFTWARE: | |
bb00b29d | 1085 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 1086 | { |
bb00b29d | 1087 | status->value.sig = |
2ea28649 | 1088 | gdb_signal_from_host (thread->event.ex_data[1]); |
bb00b29d TG |
1089 | inferior_debug (5, _(" (signal %d: %s)\n"), |
1090 | thread->event.ex_data[1], | |
2ea28649 | 1091 | gdb_signal_to_name (status->value.sig)); |
bb00b29d TG |
1092 | |
1093 | /* If the thread is stopped because it has received a signal | |
1094 | that gdb has just sent, continue. */ | |
1095 | if (thread->signaled) | |
1096 | { | |
1097 | thread->signaled = 0; | |
1098 | darwin_send_reply (inf, thread); | |
1099 | thread->msg_state = DARWIN_RUNNING; | |
1100 | status->kind = TARGET_WAITKIND_IGNORE; | |
1101 | } | |
a80b95ba TG |
1102 | } |
1103 | else | |
4e225075 | 1104 | status->value.sig = GDB_EXC_SOFTWARE; |
a80b95ba TG |
1105 | break; |
1106 | case EXC_BREAKPOINT: | |
1107 | /* Many internal GDB routines expect breakpoints to be reported | |
4e225075 | 1108 | as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT |
0963b4bd | 1109 | as a spurious signal. */ |
a493e3e2 | 1110 | status->value.sig = GDB_SIGNAL_TRAP; |
a80b95ba TG |
1111 | break; |
1112 | default: | |
a493e3e2 | 1113 | status->value.sig = GDB_SIGNAL_UNKNOWN; |
a80b95ba TG |
1114 | break; |
1115 | } | |
1116 | ||
bb00b29d TG |
1117 | return ptid_build (inf->pid, 0, thread->gdb_port); |
1118 | } | |
a41f2563 | 1119 | else if (hdr->msgh_id == 0x48) |
bb00b29d | 1120 | { |
a41f2563 | 1121 | /* MACH_NOTIFY_DEAD_NAME: notification for exit. */ |
82b19a4d TG |
1122 | int res; |
1123 | ||
1124 | res = darwin_decode_notify_message (hdr, &inf); | |
1125 | ||
1126 | if (res < 0) | |
1127 | { | |
1128 | /* Should not happen... */ | |
1129 | printf_unfiltered | |
1130 | (_("darwin_wait: ill-formatted message (id=0x%x, res=%d)\n"), | |
1131 | hdr->msgh_id, res); | |
1132 | } | |
1133 | ||
a41f2563 TG |
1134 | *pinf = NULL; |
1135 | *pthread = NULL; | |
bb00b29d | 1136 | |
82b19a4d TG |
1137 | if (res < 0 || inf == NULL) |
1138 | { | |
1139 | status->kind = TARGET_WAITKIND_IGNORE; | |
1140 | return minus_one_ptid; | |
1141 | } | |
1142 | ||
a41f2563 TG |
1143 | if (inf != NULL) |
1144 | { | |
fe978cb0 | 1145 | if (!inf->priv->no_ptrace) |
bb00b29d | 1146 | { |
a41f2563 TG |
1147 | pid_t res; |
1148 | int wstatus; | |
1149 | ||
1150 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
1151 | if (res < 0 || res != inf->pid) | |
1152 | { | |
1153 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
1154 | res, safe_strerror (errno)); | |
1155 | status->kind = TARGET_WAITKIND_IGNORE; | |
1156 | return minus_one_ptid; | |
1157 | } | |
1158 | if (WIFEXITED (wstatus)) | |
1159 | { | |
1160 | status->kind = TARGET_WAITKIND_EXITED; | |
1161 | status->value.integer = WEXITSTATUS (wstatus); | |
1162 | } | |
1163 | else | |
1164 | { | |
1165 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
5ae00552 | 1166 | status->value.sig = gdb_signal_from_host (WTERMSIG (wstatus)); |
a41f2563 TG |
1167 | } |
1168 | ||
1169 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"), | |
1170 | res, wstatus); | |
1171 | ||
1172 | /* Looks necessary on Leopard and harmless... */ | |
1173 | wait4 (inf->pid, &wstatus, 0, NULL); | |
1174 | ||
82b19a4d TG |
1175 | inferior_ptid = ptid_build (inf->pid, 0, 0); |
1176 | return inferior_ptid; | |
bb00b29d TG |
1177 | } |
1178 | else | |
1179 | { | |
a41f2563 TG |
1180 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
1181 | status->kind = TARGET_WAITKIND_EXITED; | |
1182 | status->value.integer = 0; /* Don't know. */ | |
1183 | return ptid_build (inf->pid, 0, 0); | |
bb00b29d | 1184 | } |
bb00b29d TG |
1185 | } |
1186 | } | |
1187 | ||
a41f2563 | 1188 | /* Unknown message. */ |
86ad98c3 | 1189 | warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id); |
a41f2563 | 1190 | status->kind = TARGET_WAITKIND_IGNORE; |
bb00b29d TG |
1191 | return minus_one_ptid; |
1192 | } | |
1193 | ||
1194 | static int | |
1195 | cancel_breakpoint (ptid_t ptid) | |
1196 | { | |
0963b4bd | 1197 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1198 | the current event, eventually we will resume this thread, and this |
1199 | breakpoint will trap again. | |
1200 | ||
1201 | If we do not do this, then we run the risk that the user will | |
1202 | delete or disable the breakpoint, but the thread will have already | |
1203 | tripped on it. */ | |
1204 | ||
1205 | struct regcache *regcache = get_thread_regcache (ptid); | |
1206 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1207 | CORE_ADDR pc; | |
a80b95ba | 1208 | |
527a273a | 1209 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
40625c9d | 1210 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc)) |
bb00b29d | 1211 | { |
3eb831e0 TG |
1212 | inferior_debug (4, "cancel_breakpoint for thread 0x%lx\n", |
1213 | (unsigned long) ptid_get_tid (ptid)); | |
bb00b29d TG |
1214 | |
1215 | /* Back up the PC if necessary. */ | |
527a273a | 1216 | if (gdbarch_decr_pc_after_break (gdbarch)) |
bb00b29d TG |
1217 | regcache_write_pc (regcache, pc); |
1218 | ||
1219 | return 1; | |
a80b95ba | 1220 | } |
bb00b29d TG |
1221 | return 0; |
1222 | } | |
1223 | ||
1224 | static ptid_t | |
1225 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1226 | { | |
1227 | kern_return_t kret; | |
1228 | union | |
1229 | { | |
1230 | mach_msg_header_t hdr; | |
1231 | char data[0x100]; | |
1232 | } msgin; | |
1233 | mach_msg_header_t *hdr = &msgin.hdr; | |
1234 | ptid_t res; | |
1235 | darwin_thread_t *thread; | |
1236 | struct inferior *inf; | |
1237 | ||
1238 | inferior_debug | |
1239 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
1240 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
1241 | ||
1242 | /* Handle fake stop events at first. */ | |
1243 | if (darwin_inf_fake_stop != NULL) | |
1244 | { | |
1245 | inf = darwin_inf_fake_stop; | |
1246 | darwin_inf_fake_stop = NULL; | |
1247 | ||
1248 | status->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 1249 | status->value.sig = GDB_SIGNAL_TRAP; |
fe978cb0 | 1250 | thread = VEC_index (darwin_thread_t, inf->priv->threads, 0); |
bb00b29d TG |
1251 | thread->msg_state = DARWIN_STOPPED; |
1252 | return ptid_build (inf->pid, 0, thread->gdb_port); | |
1253 | } | |
1254 | ||
1255 | do | |
1256 | { | |
1257 | /* set_sigint_trap (); */ | |
1258 | ||
1259 | /* Wait for a message. */ | |
1260 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1261 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1262 | ||
1263 | /* clear_sigint_trap (); */ | |
1264 | ||
1265 | if (kret == MACH_RCV_INTERRUPTED) | |
1266 | { | |
1267 | status->kind = TARGET_WAITKIND_IGNORE; | |
1268 | return minus_one_ptid; | |
1269 | } | |
1270 | ||
1271 | if (kret != MACH_MSG_SUCCESS) | |
1272 | { | |
c8c9911f | 1273 | inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret); |
bb00b29d TG |
1274 | status->kind = TARGET_WAITKIND_SPURIOUS; |
1275 | return minus_one_ptid; | |
1276 | } | |
1277 | ||
1278 | /* Debug: display message. */ | |
1279 | if (darwin_debug_flag > 10) | |
1280 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1281 | ||
1282 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
a41f2563 TG |
1283 | if (ptid_equal (res, minus_one_ptid)) |
1284 | continue; | |
bb00b29d | 1285 | |
a41f2563 | 1286 | /* Early return in case an inferior has exited. */ |
bb00b29d TG |
1287 | if (inf == NULL) |
1288 | return res; | |
1289 | } | |
1290 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1291 | ||
1292 | /* Stop all tasks. */ | |
1293 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1294 | ||
1295 | /* Read pending messages. */ | |
1296 | while (1) | |
a80b95ba | 1297 | { |
bb00b29d TG |
1298 | struct target_waitstatus status2; |
1299 | ptid_t ptid2; | |
1300 | ||
1301 | kret = mach_msg (&msgin.hdr, | |
1302 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1303 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1304 | ||
1305 | if (kret == MACH_RCV_TIMED_OUT) | |
1306 | break; | |
1307 | if (kret != MACH_MSG_SUCCESS) | |
1308 | { | |
1309 | inferior_debug | |
c8c9911f | 1310 | (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret); |
bb00b29d TG |
1311 | break; |
1312 | } | |
1313 | ||
a41f2563 TG |
1314 | /* Debug: display message. */ |
1315 | if (darwin_debug_flag > 10) | |
1316 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1317 | ||
bb00b29d | 1318 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); |
a80b95ba | 1319 | |
bb00b29d TG |
1320 | if (inf != NULL && thread != NULL |
1321 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1322 | { |
bb00b29d TG |
1323 | if (thread->single_step |
1324 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) | |
1325 | { | |
1326 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1327 | darwin_send_reply (inf, thread); | |
1328 | thread->msg_state = DARWIN_RUNNING; | |
1329 | } | |
1330 | else | |
1331 | inferior_debug | |
c8c9911f | 1332 | (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"), |
bb00b29d | 1333 | thread->gdb_port); |
a80b95ba | 1334 | } |
bb00b29d TG |
1335 | else |
1336 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1337 | } | |
1338 | return res; | |
1339 | } | |
a80b95ba | 1340 | |
bb00b29d | 1341 | static ptid_t |
a6290449 | 1342 | darwin_wait_to (struct target_ops *ops, |
bb00b29d TG |
1343 | ptid_t ptid, struct target_waitstatus *status, int options) |
1344 | { | |
1345 | return darwin_wait (ptid, status); | |
1346 | } | |
a80b95ba | 1347 | |
bb00b29d | 1348 | static void |
bfedc46a | 1349 | darwin_interrupt (struct target_ops *self, ptid_t t) |
bb00b29d TG |
1350 | { |
1351 | struct inferior *inf = current_inferior (); | |
a80b95ba | 1352 | |
bb00b29d | 1353 | /* FIXME: handle in no_ptrace mode. */ |
fe978cb0 | 1354 | gdb_assert (!inf->priv->no_ptrace); |
bb00b29d | 1355 | kill (inf->pid, SIGINT); |
a80b95ba TG |
1356 | } |
1357 | ||
82b19a4d TG |
1358 | /* Deallocate threads port and vector. */ |
1359 | ||
a80b95ba | 1360 | static void |
82b19a4d | 1361 | darwin_deallocate_threads (struct inferior *inf) |
a80b95ba | 1362 | { |
fe978cb0 | 1363 | if (inf->priv->threads) |
a80b95ba | 1364 | { |
82b19a4d | 1365 | kern_return_t kret; |
a80b95ba | 1366 | int k; |
bb00b29d TG |
1367 | darwin_thread_t *t; |
1368 | for (k = 0; | |
fe978cb0 | 1369 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d | 1370 | k++) |
a80b95ba | 1371 | { |
bb00b29d | 1372 | kret = mach_port_deallocate (gdb_task, t->gdb_port); |
a80b95ba TG |
1373 | MACH_CHECK_ERROR (kret); |
1374 | } | |
fe978cb0 PA |
1375 | VEC_free (darwin_thread_t, inf->priv->threads); |
1376 | inf->priv->threads = NULL; | |
a80b95ba | 1377 | } |
82b19a4d | 1378 | } |
a80b95ba | 1379 | |
82b19a4d TG |
1380 | static void |
1381 | darwin_mourn_inferior (struct target_ops *ops) | |
1382 | { | |
1383 | struct inferior *inf = current_inferior (); | |
1384 | kern_return_t kret; | |
1385 | mach_port_t prev; | |
1386 | int i; | |
1387 | ||
1388 | /* Deallocate threads. */ | |
1389 | darwin_deallocate_threads (inf); | |
1390 | ||
1391 | /* Remove notify_port from darwin_port_set. */ | |
bb00b29d | 1392 | kret = mach_port_move_member (gdb_task, |
fe978cb0 | 1393 | inf->priv->notify_port, MACH_PORT_NULL); |
fda184b6 | 1394 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1395 | |
82b19a4d | 1396 | /* Remove task port dead_name notification. */ |
fe978cb0 | 1397 | kret = mach_port_request_notification (gdb_task, inf->priv->task, |
a80b95ba | 1398 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1399 | MACH_PORT_NULL, |
a80b95ba TG |
1400 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1401 | &prev); | |
1402 | /* This can fail if the task is dead. */ | |
c8c9911f | 1403 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
fe978cb0 | 1404 | inf->priv->task, prev, inf->priv->notify_port); |
bb00b29d | 1405 | |
a80b95ba TG |
1406 | if (kret == KERN_SUCCESS) |
1407 | { | |
1408 | kret = mach_port_deallocate (gdb_task, prev); | |
1409 | MACH_CHECK_ERROR (kret); | |
1410 | } | |
1411 | ||
82b19a4d | 1412 | /* Destroy notify_port. */ |
fe978cb0 | 1413 | kret = mach_port_destroy (gdb_task, inf->priv->notify_port); |
bb00b29d TG |
1414 | MACH_CHECK_ERROR (kret); |
1415 | ||
a80b95ba | 1416 | /* Deallocate saved exception ports. */ |
82b19a4d | 1417 | darwin_deallocate_exception_ports (inf->priv); |
a80b95ba | 1418 | |
82b19a4d | 1419 | /* Deallocate task port. */ |
fe978cb0 | 1420 | kret = mach_port_deallocate (gdb_task, inf->priv->task); |
a80b95ba TG |
1421 | MACH_CHECK_ERROR (kret); |
1422 | ||
fe978cb0 PA |
1423 | xfree (inf->priv); |
1424 | inf->priv = NULL; | |
a80b95ba | 1425 | |
c1ee2fb3 | 1426 | inf_child_mourn_inferior (ops); |
a80b95ba TG |
1427 | } |
1428 | ||
1429 | static void | |
bb00b29d | 1430 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1431 | { |
bb00b29d TG |
1432 | int k; |
1433 | darwin_thread_t *t; | |
a80b95ba | 1434 | |
bb00b29d | 1435 | for (k = 0; |
fe978cb0 | 1436 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
1437 | k++) |
1438 | { | |
1439 | if (t->msg_state == DARWIN_MESSAGE) | |
1440 | darwin_resume_thread (inf, t, 0, 0); | |
1441 | } | |
a80b95ba TG |
1442 | } |
1443 | ||
1444 | static void | |
bb00b29d | 1445 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1446 | { |
1447 | struct target_waitstatus wstatus; | |
1448 | ptid_t ptid; | |
1449 | kern_return_t kret; | |
1450 | int status; | |
1451 | int res; | |
1452 | ||
bb00b29d | 1453 | gdb_assert (inf != NULL); |
a80b95ba | 1454 | |
bb00b29d | 1455 | darwin_suspend_inferior (inf); |
a80b95ba | 1456 | |
bb00b29d | 1457 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1458 | |
fe978cb0 | 1459 | if (inf->priv->no_ptrace) |
bb00b29d | 1460 | return; |
a80b95ba | 1461 | |
bb00b29d TG |
1462 | res = kill (inf->pid, SIGSTOP); |
1463 | if (res != 0) | |
b37520b6 | 1464 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1465 | |
bb00b29d TG |
1466 | /* Wait until the process is really stopped. */ |
1467 | while (1) | |
a80b95ba | 1468 | { |
bb00b29d TG |
1469 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1470 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 1471 | && wstatus.value.sig == GDB_SIGNAL_STOP) |
bb00b29d | 1472 | break; |
a80b95ba TG |
1473 | } |
1474 | } | |
1475 | ||
1476 | static kern_return_t | |
1477 | darwin_save_exception_ports (darwin_inferior *inf) | |
1478 | { | |
1479 | kern_return_t kret; | |
1480 | ||
1481 | inf->exception_info.count = | |
1482 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1483 | ||
1484 | kret = task_get_exception_ports | |
1485 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1486 | &inf->exception_info.count, inf->exception_info.ports, | |
1487 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1488 | return kret; | |
1489 | } | |
1490 | ||
1491 | static kern_return_t | |
1492 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1493 | { | |
1494 | int i; | |
1495 | kern_return_t kret; | |
1496 | ||
1497 | for (i = 0; i < inf->exception_info.count; i++) | |
1498 | { | |
1499 | kret = task_set_exception_ports | |
1500 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1501 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1502 | if (kret != KERN_SUCCESS) | |
1503 | return kret; | |
1504 | } | |
1505 | ||
1506 | return KERN_SUCCESS; | |
1507 | } | |
1508 | ||
82b19a4d TG |
1509 | /* Deallocate saved exception ports. */ |
1510 | ||
1511 | static void | |
1512 | darwin_deallocate_exception_ports (darwin_inferior *inf) | |
1513 | { | |
1514 | int i; | |
1515 | kern_return_t kret; | |
1516 | ||
1517 | for (i = 0; i < inf->exception_info.count; i++) | |
1518 | { | |
1519 | kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]); | |
1520 | MACH_CHECK_ERROR (kret); | |
1521 | } | |
1522 | inf->exception_info.count = 0; | |
1523 | } | |
1524 | ||
1525 | static void | |
1526 | darwin_setup_exceptions (struct inferior *inf) | |
1527 | { | |
1528 | kern_return_t kret; | |
1529 | int traps_expected; | |
1530 | exception_mask_t mask; | |
1531 | ||
1532 | kret = darwin_save_exception_ports (inf->priv); | |
1533 | if (kret != KERN_SUCCESS) | |
1534 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1535 | "returned: %d"), | |
1536 | kret); | |
1537 | ||
1538 | /* Set exception port. */ | |
1539 | if (enable_mach_exceptions) | |
1540 | mask = EXC_MASK_ALL; | |
1541 | else | |
1542 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
1543 | kret = task_set_exception_ports (inf->priv->task, mask, darwin_ex_port, | |
1544 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); | |
1545 | if (kret != KERN_SUCCESS) | |
1546 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1547 | "returned: %d"), | |
1548 | kret); | |
1549 | } | |
1550 | ||
a80b95ba | 1551 | static void |
bb00b29d TG |
1552 | darwin_kill_inferior (struct target_ops *ops) |
1553 | { | |
1554 | struct inferior *inf = current_inferior (); | |
1555 | struct target_waitstatus wstatus; | |
1556 | ptid_t ptid; | |
1557 | kern_return_t kret; | |
1558 | int status; | |
1559 | int res; | |
1560 | ||
1561 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1562 | return; | |
1563 | ||
1564 | gdb_assert (inf != NULL); | |
1565 | ||
fe978cb0 | 1566 | kret = darwin_restore_exception_ports (inf->priv); |
ee41036f | 1567 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1568 | |
ee41036f | 1569 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1570 | |
ee41036f | 1571 | res = kill (inf->pid, 9); |
bb00b29d | 1572 | |
ee41036f | 1573 | if (res == 0) |
bb00b29d | 1574 | { |
bb00b29d | 1575 | darwin_resume_inferior (inf); |
a6290449 | 1576 | |
bb00b29d TG |
1577 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1578 | } | |
ee41036f TG |
1579 | else if (errno != ESRCH) |
1580 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1581 | inf->pid, safe_strerror (errno)); | |
bb00b29d | 1582 | |
bc1e6c81 | 1583 | target_mourn_inferior (inferior_ptid); |
bb00b29d TG |
1584 | } |
1585 | ||
82b19a4d TG |
1586 | static void |
1587 | darwin_setup_request_notification (struct inferior *inf) | |
1588 | { | |
1589 | kern_return_t kret; | |
1590 | mach_port_t prev_not; | |
1591 | ||
1592 | kret = mach_port_request_notification (gdb_task, inf->priv->task, | |
1593 | MACH_NOTIFY_DEAD_NAME, 0, | |
1594 | inf->priv->notify_port, | |
1595 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
1596 | &prev_not); | |
1597 | if (kret != KERN_SUCCESS) | |
1598 | error (_("Termination notification request failed, " | |
1599 | "mach_port_request_notification\n" | |
1600 | "returned: %d"), | |
1601 | kret); | |
1602 | if (prev_not != MACH_PORT_NULL) | |
1603 | { | |
1604 | /* This is unexpected, as there should not be any previously | |
1605 | registered notification request. But this is not a fatal | |
1606 | issue, so just emit a warning. */ | |
1607 | warning (_("\ | |
1608 | A task termination request was registered before the debugger registered\n\ | |
1609 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1610 | impact on the debugging session.")); | |
1611 | } | |
1612 | } | |
1613 | ||
bb00b29d TG |
1614 | static void |
1615 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1616 | { |
a80b95ba TG |
1617 | kern_return_t kret; |
1618 | mach_port_t prev_port; | |
1619 | int traps_expected; | |
bb00b29d | 1620 | mach_port_t prev_not; |
a80b95ba TG |
1621 | exception_mask_t mask; |
1622 | ||
fe978cb0 | 1623 | inf->priv = XCNEW (darwin_inferior); |
bb00b29d | 1624 | |
fe978cb0 | 1625 | kret = task_for_pid (gdb_task, inf->pid, &inf->priv->task); |
a80b95ba TG |
1626 | if (kret != KERN_SUCCESS) |
1627 | { | |
1628 | int status; | |
a80b95ba TG |
1629 | |
1630 | if (!inf->attach_flag) | |
1631 | { | |
bb00b29d TG |
1632 | kill (inf->pid, 9); |
1633 | waitpid (inf->pid, &status, 0); | |
a80b95ba TG |
1634 | } |
1635 | ||
1636 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
15c19d39 | 1637 | " (please check gdb is codesigned - see taskgated(8))"), |
bb00b29d | 1638 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
a80b95ba TG |
1639 | } |
1640 | ||
bb00b29d | 1641 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
fe978cb0 | 1642 | inf->priv->task, inf->pid); |
a80b95ba TG |
1643 | |
1644 | if (darwin_ex_port == MACH_PORT_NULL) | |
1645 | { | |
1646 | /* Create a port to get exceptions. */ | |
1647 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1648 | &darwin_ex_port); | |
fda184b6 JB |
1649 | if (kret != KERN_SUCCESS) |
1650 | error (_("Unable to create exception port, mach_port_allocate " | |
1651 | "returned: %d"), | |
1652 | kret); | |
a80b95ba TG |
1653 | |
1654 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, | |
1655 | MACH_MSG_TYPE_MAKE_SEND); | |
fda184b6 JB |
1656 | if (kret != KERN_SUCCESS) |
1657 | error (_("Unable to create exception port, mach_port_insert_right " | |
1658 | "returned: %d"), | |
1659 | kret); | |
a80b95ba TG |
1660 | |
1661 | /* Create a port set and put ex_port in it. */ | |
1662 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1663 | &darwin_port_set); | |
fda184b6 JB |
1664 | if (kret != KERN_SUCCESS) |
1665 | error (_("Unable to create port set, mach_port_allocate " | |
1666 | "returned: %d"), | |
1667 | kret); | |
a80b95ba TG |
1668 | |
1669 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); | |
fda184b6 JB |
1670 | if (kret != KERN_SUCCESS) |
1671 | error (_("Unable to move exception port into new port set, " | |
1672 | "mach_port_move_member\n" | |
1673 | "returned: %d"), | |
1674 | kret); | |
bb00b29d | 1675 | } |
a80b95ba | 1676 | |
bb00b29d TG |
1677 | /* Create a port to be notified when the child task terminates. */ |
1678 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
fe978cb0 | 1679 | &inf->priv->notify_port); |
fda184b6 JB |
1680 | if (kret != KERN_SUCCESS) |
1681 | error (_("Unable to create notification port, mach_port_allocate " | |
1682 | "returned: %d"), | |
1683 | kret); | |
a80b95ba | 1684 | |
bb00b29d | 1685 | kret = mach_port_move_member (gdb_task, |
fe978cb0 | 1686 | inf->priv->notify_port, darwin_port_set); |
fda184b6 JB |
1687 | if (kret != KERN_SUCCESS) |
1688 | error (_("Unable to move notification port into new port set, " | |
1689 | "mach_port_move_member\n" | |
1690 | "returned: %d"), | |
1691 | kret); | |
a80b95ba | 1692 | |
82b19a4d | 1693 | darwin_setup_request_notification (inf); |
a80b95ba | 1694 | |
82b19a4d | 1695 | darwin_setup_exceptions (inf); |
a80b95ba | 1696 | |
6a3cb8e8 PA |
1697 | if (!target_is_pushed (darwin_ops)) |
1698 | push_target (darwin_ops); | |
a80b95ba TG |
1699 | } |
1700 | ||
1701 | static void | |
bb00b29d | 1702 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1703 | { |
bb00b29d TG |
1704 | darwin_thread_t *thread; |
1705 | ptid_t new_ptid; | |
a80b95ba TG |
1706 | |
1707 | darwin_check_new_threads (inf); | |
1708 | ||
fe978cb0 PA |
1709 | gdb_assert (inf->priv->threads |
1710 | && VEC_length (darwin_thread_t, inf->priv->threads) > 0); | |
1711 | thread = VEC_index (darwin_thread_t, inf->priv->threads, 0); | |
bb00b29d TG |
1712 | |
1713 | /* Note: fork_inferior automatically add a thead but it uses a wrong ptid. | |
1714 | Fix up. */ | |
1715 | new_ptid = ptid_build (inf->pid, 0, thread->gdb_port); | |
1716 | thread_change_ptid (inferior_ptid, new_ptid); | |
1717 | inferior_ptid = new_ptid; | |
1718 | } | |
1719 | ||
1720 | /* The child must synchronize with gdb: gdb must set the exception port | |
1721 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1722 | FIXME: is there a lighter way ? */ | |
1723 | static int ptrace_fds[2]; | |
1724 | ||
1725 | static void | |
1726 | darwin_ptrace_me (void) | |
1727 | { | |
1728 | int res; | |
1729 | char c; | |
1730 | ||
1731 | /* Close write end point. */ | |
1732 | close (ptrace_fds[1]); | |
1733 | ||
1734 | /* Wait until gdb is ready. */ | |
1735 | res = read (ptrace_fds[0], &c, 1); | |
fda184b6 JB |
1736 | if (res != 0) |
1737 | error (_("unable to read from pipe, read returned: %d"), res); | |
bb00b29d TG |
1738 | close (ptrace_fds[0]); |
1739 | ||
1740 | /* Get rid of privileges. */ | |
1741 | setegid (getgid ()); | |
1742 | ||
1743 | /* Set TRACEME. */ | |
1744 | PTRACE (PT_TRACE_ME, 0, 0, 0); | |
1745 | ||
1746 | /* Redirect signals to exception port. */ | |
1747 | PTRACE (PT_SIGEXC, 0, 0, 0); | |
1748 | } | |
1749 | ||
1750 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1751 | static void | |
1752 | darwin_pre_ptrace (void) | |
1753 | { | |
1754 | if (pipe (ptrace_fds) != 0) | |
1755 | { | |
1756 | ptrace_fds[0] = -1; | |
1757 | ptrace_fds[1] = -1; | |
1758 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1759 | } | |
21ff4686 TT |
1760 | |
1761 | mark_fd_no_cloexec (ptrace_fds[0]); | |
1762 | mark_fd_no_cloexec (ptrace_fds[1]); | |
a80b95ba TG |
1763 | } |
1764 | ||
1765 | static void | |
1766 | darwin_ptrace_him (int pid) | |
1767 | { | |
1768 | task_t itask; | |
1769 | kern_return_t kret; | |
1770 | mach_port_t prev_port; | |
1771 | int traps_expected; | |
bb00b29d | 1772 | struct inferior *inf = current_inferior (); |
a80b95ba | 1773 | |
bb00b29d | 1774 | darwin_attach_pid (inf); |
a80b95ba TG |
1775 | |
1776 | /* Let's the child run. */ | |
1777 | close (ptrace_fds[0]); | |
1778 | close (ptrace_fds[1]); | |
1779 | ||
21ff4686 TT |
1780 | unmark_fd_no_cloexec (ptrace_fds[0]); |
1781 | unmark_fd_no_cloexec (ptrace_fds[1]); | |
1782 | ||
bb00b29d TG |
1783 | darwin_init_thread_list (inf); |
1784 | ||
a80b95ba TG |
1785 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
1786 | } | |
1787 | ||
e69860f1 TG |
1788 | static void |
1789 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1790 | { | |
1791 | posix_spawnattr_t attr; | |
1792 | short ps_flags = 0; | |
f00c55f8 | 1793 | int res; |
e69860f1 | 1794 | |
f00c55f8 TG |
1795 | res = posix_spawnattr_init (&attr); |
1796 | if (res != 0) | |
e69860f1 TG |
1797 | { |
1798 | fprintf_unfiltered | |
1799 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); | |
1800 | return; | |
1801 | } | |
1802 | ||
1803 | /* Do like execve: replace the image. */ | |
1804 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1805 | ||
1806 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1807 | kernel include files. */ | |
1808 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1809 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1810 | #endif | |
1811 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1812 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1813 | if (res != 0) | |
e69860f1 | 1814 | { |
f00c55f8 | 1815 | fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1816 | return; |
1817 | } | |
1818 | ||
1819 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1820 | } | |
1821 | ||
a80b95ba TG |
1822 | static void |
1823 | darwin_create_inferior (struct target_ops *ops, char *exec_file, | |
1824 | char *allargs, char **env, int from_tty) | |
1825 | { | |
1826 | /* Do the hard work. */ | |
1827 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, darwin_ptrace_him, | |
e69860f1 | 1828 | darwin_pre_ptrace, NULL, darwin_execvp); |
bb00b29d | 1829 | |
a80b95ba TG |
1830 | /* Return now in case of error. */ |
1831 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1832 | return; | |
1833 | } | |
1834 | \f | |
1835 | ||
726ce67c JB |
1836 | /* Set things up such that the next call to darwin_wait will immediately |
1837 | return a fake stop event for inferior INF. | |
1838 | ||
1839 | This assumes that the inferior's thread list has been initialized, | |
1840 | as it will suspend the inferior's first thread. */ | |
1841 | ||
1842 | static void | |
1843 | darwin_setup_fake_stop_event (struct inferior *inf) | |
1844 | { | |
1845 | darwin_thread_t *thread; | |
1846 | kern_return_t kret; | |
1847 | ||
1848 | gdb_assert (darwin_inf_fake_stop == NULL); | |
1849 | darwin_inf_fake_stop = inf; | |
1850 | ||
1851 | /* When detecting a fake pending stop event, darwin_wait returns | |
1852 | an event saying that the first thread is in a DARWIN_STOPPED | |
1853 | state. To make that accurate, we need to suspend that thread | |
1854 | as well. Otherwise, we'll try resuming it when resuming the | |
1855 | inferior, and get a warning because the thread's suspend count | |
1856 | is already zero, making the resume request useless. */ | |
fe978cb0 | 1857 | thread = VEC_index (darwin_thread_t, inf->priv->threads, 0); |
726ce67c JB |
1858 | kret = thread_suspend (thread->gdb_port); |
1859 | MACH_CHECK_ERROR (kret); | |
1860 | } | |
1861 | ||
a80b95ba TG |
1862 | /* Attach to process PID, then initialize for debugging it |
1863 | and wait for the trace-trap that results from attaching. */ | |
1864 | static void | |
c0939df1 | 1865 | darwin_attach (struct target_ops *ops, const char *args, int from_tty) |
a80b95ba TG |
1866 | { |
1867 | pid_t pid; | |
1868 | pid_t pid2; | |
1869 | int wstatus; | |
1870 | int res; | |
1871 | struct inferior *inf; | |
bb00b29d | 1872 | kern_return_t kret; |
a80b95ba | 1873 | |
74164c56 | 1874 | pid = parse_pid_to_attach (args); |
a80b95ba | 1875 | |
74164c56 | 1876 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1877 | error (_("I refuse to debug myself!")); |
1878 | ||
1879 | if (from_tty) | |
bb00b29d TG |
1880 | { |
1881 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1882 | |
bb00b29d TG |
1883 | if (exec_file) |
1884 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
1885 | target_pid_to_str (pid_to_ptid (pid))); | |
1886 | else | |
1887 | printf_unfiltered (_("Attaching to %s\n"), | |
1888 | target_pid_to_str (pid_to_ptid (pid))); | |
1889 | ||
1890 | gdb_flush (gdb_stdout); | |
1891 | } | |
1892 | ||
1893 | if (pid == 0 || kill (pid, 0) < 0) | |
1894 | error (_("Can't attach to process %d: %s (%d)"), | |
1895 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1896 | |
bb00b29d | 1897 | inferior_ptid = pid_to_ptid (pid); |
6c95b8df PA |
1898 | inf = current_inferior (); |
1899 | inferior_appeared (inf, pid); | |
a80b95ba | 1900 | inf->attach_flag = 1; |
6c95b8df | 1901 | |
bb00b29d TG |
1902 | /* Always add a main thread. */ |
1903 | add_thread_silent (inferior_ptid); | |
a80b95ba | 1904 | |
bb00b29d | 1905 | darwin_attach_pid (inf); |
a80b95ba | 1906 | |
bb00b29d | 1907 | darwin_suspend_inferior (inf); |
a80b95ba | 1908 | |
bb00b29d | 1909 | darwin_init_thread_list (inf); |
a80b95ba | 1910 | |
fe978cb0 | 1911 | darwin_check_osabi (inf->priv, ptid_get_tid (inferior_ptid)); |
a80b95ba | 1912 | |
726ce67c JB |
1913 | darwin_setup_fake_stop_event (inf); |
1914 | ||
fe978cb0 | 1915 | inf->priv->no_ptrace = 1; |
a80b95ba TG |
1916 | } |
1917 | ||
1918 | /* Take a program previously attached to and detaches it. | |
1919 | The program resumes execution and will no longer stop | |
1920 | on signals, etc. We'd better not have left any breakpoints | |
1921 | in the program or it'll die when it hits one. For this | |
1922 | to work, it may be necessary for the process to have been | |
1923 | previously attached. It *might* work if the program was | |
1924 | started via fork. */ | |
1925 | static void | |
52554a0e | 1926 | darwin_detach (struct target_ops *ops, const char *args, int from_tty) |
a80b95ba | 1927 | { |
bb00b29d TG |
1928 | pid_t pid = ptid_get_pid (inferior_ptid); |
1929 | struct inferior *inf = current_inferior (); | |
a80b95ba TG |
1930 | kern_return_t kret; |
1931 | int res; | |
1932 | ||
bb00b29d | 1933 | /* Display message. */ |
0f48b757 | 1934 | target_announce_detach (from_tty); |
a80b95ba | 1935 | |
bb00b29d | 1936 | /* If ptrace() is in use, stop the process. */ |
fe978cb0 | 1937 | if (!inf->priv->no_ptrace) |
bb00b29d | 1938 | darwin_stop_inferior (inf); |
a80b95ba | 1939 | |
fe978cb0 | 1940 | kret = darwin_restore_exception_ports (inf->priv); |
a80b95ba TG |
1941 | MACH_CHECK_ERROR (kret); |
1942 | ||
fe978cb0 | 1943 | if (!inf->priv->no_ptrace) |
a80b95ba | 1944 | { |
bb00b29d TG |
1945 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1946 | if (res != 0) | |
1947 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1948 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1949 | } |
1950 | ||
bb00b29d | 1951 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1952 | |
5e9bc145 JB |
1953 | /* When using ptrace, we have just performed a PT_DETACH, which |
1954 | resumes the inferior. On the other hand, when we are not using | |
1955 | ptrace, we need to resume its execution ourselves. */ | |
fe978cb0 | 1956 | if (inf->priv->no_ptrace) |
5e9bc145 | 1957 | darwin_resume_inferior (inf); |
a80b95ba TG |
1958 | |
1959 | darwin_mourn_inferior (ops); | |
1960 | } | |
1961 | ||
1962 | static void | |
1963 | darwin_files_info (struct target_ops *ops) | |
1964 | { | |
a80b95ba TG |
1965 | } |
1966 | ||
1967 | static char * | |
117de6a9 | 1968 | darwin_pid_to_str (struct target_ops *ops, ptid_t ptid) |
a80b95ba | 1969 | { |
bb00b29d TG |
1970 | static char buf[80]; |
1971 | long tid = ptid_get_tid (ptid); | |
1972 | ||
1973 | if (tid != 0) | |
1974 | { | |
1975 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
1976 | tid, ptid_get_pid (ptid)); | |
1977 | return buf; | |
1978 | } | |
a80b95ba | 1979 | |
bb00b29d | 1980 | return normal_pid_to_str (ptid); |
a80b95ba TG |
1981 | } |
1982 | ||
1983 | static int | |
28439f5e | 1984 | darwin_thread_alive (struct target_ops *ops, ptid_t ptid) |
a80b95ba TG |
1985 | { |
1986 | return 1; | |
1987 | } | |
1988 | ||
1989 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
1990 | copy it to RDADDR in gdb's address space. | |
1991 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
1992 | to ADDR in inferior task's address space. | |
f00c55f8 | 1993 | Return 0 on failure; number of bytes read / writen otherwise. */ |
3eb831e0 | 1994 | |
a80b95ba TG |
1995 | static int |
1996 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 1997 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 1998 | ULONGEST length) |
a80b95ba | 1999 | { |
bb00b29d | 2000 | kern_return_t kret; |
3eb831e0 | 2001 | mach_vm_size_t res_length = 0; |
a80b95ba | 2002 | pointer_t copied; |
b9dd1947 | 2003 | mach_msg_type_number_t copy_count; |
a80b95ba TG |
2004 | mach_vm_size_t remaining_length; |
2005 | mach_vm_address_t region_address; | |
2006 | mach_vm_size_t region_length; | |
2007 | ||
b55e14c7 YQ |
2008 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
2009 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 2010 | |
3eb831e0 TG |
2011 | /* First read. */ |
2012 | if (rdaddr != NULL) | |
a80b95ba | 2013 | { |
3eb831e0 | 2014 | mach_vm_size_t count; |
a80b95ba | 2015 | |
3eb831e0 TG |
2016 | /* According to target.h(to_xfer_partial), one and only one may be |
2017 | non-null. */ | |
2018 | gdb_assert (wraddr == NULL); | |
a80b95ba | 2019 | |
3eb831e0 TG |
2020 | kret = mach_vm_read_overwrite (task, addr, length, |
2021 | (mach_vm_address_t) rdaddr, &count); | |
2022 | if (kret != KERN_SUCCESS) | |
2023 | { | |
2024 | inferior_debug | |
2025 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
2026 | core_addr_to_string (addr), mach_error_string (kret)); | |
2027 | return 0; | |
2028 | } | |
2029 | return count; | |
2030 | } | |
a80b95ba | 2031 | |
3eb831e0 TG |
2032 | /* See above. */ |
2033 | gdb_assert (wraddr != NULL); | |
a80b95ba | 2034 | |
3eb831e0 | 2035 | while (length != 0) |
a80b95ba | 2036 | { |
3eb831e0 TG |
2037 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
2038 | mach_vm_address_t region_address = (mach_vm_address_t) (addr - offset); | |
2039 | mach_vm_size_t aligned_length = | |
2040 | (mach_vm_size_t) PAGE_ROUND (offset + length); | |
bb00b29d | 2041 | vm_region_submap_short_info_data_64_t info; |
3eb831e0 TG |
2042 | mach_msg_type_number_t count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; |
2043 | natural_t region_depth = 1000; | |
bb00b29d | 2044 | mach_vm_address_t region_start = region_address; |
3eb831e0 TG |
2045 | mach_vm_size_t region_length; |
2046 | mach_vm_size_t write_length; | |
bb00b29d | 2047 | |
3eb831e0 | 2048 | /* Read page protection. */ |
bb00b29d TG |
2049 | kret = mach_vm_region_recurse |
2050 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
2051 | (vm_region_recurse_info_t) &info, &count); | |
2052 | ||
2053 | if (kret != KERN_SUCCESS) | |
a80b95ba | 2054 | { |
bb00b29d TG |
2055 | inferior_debug (1, _("darwin_read_write_inferior: " |
2056 | "mach_vm_region_recurse failed at %s: %s\n"), | |
2057 | core_addr_to_string (region_address), | |
2058 | mach_error_string (kret)); | |
3eb831e0 | 2059 | return res_length; |
a80b95ba TG |
2060 | } |
2061 | ||
bb00b29d TG |
2062 | inferior_debug |
2063 | (9, _("darwin_read_write_inferior: " | |
2064 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
2065 | core_addr_to_string (region_address), | |
2066 | core_addr_to_string (region_start), | |
2067 | core_addr_to_string (region_length)); | |
2068 | ||
0963b4bd | 2069 | /* Check for holes in memory. */ |
bb00b29d | 2070 | if (region_start > region_address) |
a80b95ba | 2071 | { |
0963b4bd | 2072 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 2073 | core_addr_to_string (region_address), |
bb00b29d | 2074 | core_addr_to_string (region_start), |
a80b95ba | 2075 | (unsigned)region_length); |
3eb831e0 | 2076 | return res_length; |
a80b95ba TG |
2077 | } |
2078 | ||
bb00b29d TG |
2079 | /* Adjust the length. */ |
2080 | region_length -= (region_address - region_start); | |
3eb831e0 TG |
2081 | if (region_length > aligned_length) |
2082 | region_length = aligned_length; | |
bb00b29d | 2083 | |
3eb831e0 TG |
2084 | /* Make the pages RW. */ |
2085 | if (!(info.protection & VM_PROT_WRITE)) | |
a80b95ba | 2086 | { |
3eb831e0 TG |
2087 | vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE; |
2088 | ||
2089 | kret = mach_vm_protect (task, region_address, region_length, | |
2090 | FALSE, prot); | |
bb00b29d TG |
2091 | if (kret != KERN_SUCCESS) |
2092 | { | |
3eb831e0 TG |
2093 | prot |= VM_PROT_COPY; |
2094 | kret = mach_vm_protect (task, region_address, region_length, | |
2095 | FALSE, prot); | |
2096 | } | |
2097 | if (kret != KERN_SUCCESS) | |
2098 | { | |
2099 | warning (_("darwin_read_write_inferior: " | |
2100 | "mach_vm_protect failed at %s " | |
2101 | "(len=0x%lx, prot=0x%x): %s"), | |
bb00b29d | 2102 | core_addr_to_string (region_address), |
3eb831e0 | 2103 | (unsigned long) region_length, (unsigned) prot, |
bb00b29d | 2104 | mach_error_string (kret)); |
3eb831e0 | 2105 | return res_length; |
bb00b29d | 2106 | } |
a80b95ba TG |
2107 | } |
2108 | ||
3eb831e0 TG |
2109 | if (offset + length > region_length) |
2110 | write_length = region_length - offset; | |
2111 | else | |
2112 | write_length = length; | |
2113 | ||
2114 | /* Write. */ | |
2115 | kret = mach_vm_write (task, addr, (vm_offset_t) wraddr, write_length); | |
2116 | if (kret != KERN_SUCCESS) | |
2117 | { | |
2118 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
2119 | mach_error_string (kret)); | |
2120 | return res_length; | |
2121 | } | |
2122 | ||
2123 | /* Restore page rights. */ | |
a80b95ba TG |
2124 | if (!(info.protection & VM_PROT_WRITE)) |
2125 | { | |
bb00b29d | 2126 | kret = mach_vm_protect (task, region_address, region_length, |
3eb831e0 | 2127 | FALSE, info.protection); |
bb00b29d | 2128 | if (kret != KERN_SUCCESS) |
a80b95ba | 2129 | { |
3eb831e0 TG |
2130 | warning (_("darwin_read_write_inferior: " |
2131 | "mach_vm_protect restore failed at %s " | |
2132 | "(len=0x%lx): %s"), | |
bb00b29d | 2133 | core_addr_to_string (region_address), |
3eb831e0 TG |
2134 | (unsigned long) region_length, |
2135 | mach_error_string (kret)); | |
a80b95ba TG |
2136 | } |
2137 | } | |
a80b95ba | 2138 | |
3eb831e0 TG |
2139 | addr += write_length; |
2140 | wraddr += write_length; | |
2141 | res_length += write_length; | |
2142 | length -= write_length; | |
a80b95ba | 2143 | } |
3eb831e0 TG |
2144 | |
2145 | return res_length; | |
a80b95ba TG |
2146 | } |
2147 | ||
f00c55f8 | 2148 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
ad2073b0 | 2149 | to RDADDR (in big endian). |
569283d4 | 2150 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 2151 | |
b967eb24 | 2152 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 2153 | /* This is not available in Darwin 9. */ |
9b409511 | 2154 | static enum target_xfer_status |
b9dd1947 | 2155 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 2156 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
2157 | { |
2158 | struct task_dyld_info task_dyld_info; | |
2159 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
2160 | int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t); | |
2161 | kern_return_t kret; | |
2162 | ||
ad2073b0 | 2163 | if (addr != 0 || length > sizeof (mach_vm_address_t)) |
9b409511 | 2164 | return TARGET_XFER_EOF; |
f00c55f8 | 2165 | |
ad2073b0 TG |
2166 | kret = task_info (task, TASK_DYLD_INFO, |
2167 | (task_info_t) &task_dyld_info, &count); | |
f00c55f8 TG |
2168 | MACH_CHECK_ERROR (kret); |
2169 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 2170 | return TARGET_XFER_E_IO; |
ad2073b0 TG |
2171 | |
2172 | store_unsigned_integer (rdaddr, length, BFD_ENDIAN_BIG, | |
2173 | task_dyld_info.all_image_info_addr); | |
9b409511 YQ |
2174 | *xfered_len = (ULONGEST) length; |
2175 | return TARGET_XFER_OK; | |
f00c55f8 | 2176 | } |
569283d4 | 2177 | #endif |
f00c55f8 | 2178 | |
a80b95ba | 2179 | \f |
a80b95ba | 2180 | |
1b281443 | 2181 | static enum target_xfer_status |
a80b95ba TG |
2182 | darwin_xfer_partial (struct target_ops *ops, |
2183 | enum target_object object, const char *annex, | |
2184 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 2185 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
a80b95ba | 2186 | { |
bb00b29d TG |
2187 | struct inferior *inf = current_inferior (); |
2188 | ||
2189 | inferior_debug | |
b55e14c7 YQ |
2190 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
2191 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
2192 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
2193 | inf->pid); | |
a80b95ba | 2194 | |
f00c55f8 TG |
2195 | switch (object) |
2196 | { | |
2197 | case TARGET_OBJECT_MEMORY: | |
9b409511 | 2198 | { |
fe978cb0 | 2199 | int l = darwin_read_write_inferior (inf->priv->task, offset, |
9b409511 YQ |
2200 | readbuf, writebuf, len); |
2201 | ||
2202 | if (l == 0) | |
2203 | return TARGET_XFER_EOF; | |
2204 | else | |
2205 | { | |
2206 | gdb_assert (l > 0); | |
2207 | *xfered_len = (ULONGEST) l; | |
2208 | return TARGET_XFER_OK; | |
2209 | } | |
2210 | } | |
569283d4 | 2211 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
2212 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
2213 | if (writebuf != NULL || readbuf == NULL) | |
2214 | { | |
2215 | /* Support only read. */ | |
2ed4b548 | 2216 | return TARGET_XFER_E_IO; |
f00c55f8 | 2217 | } |
fe978cb0 | 2218 | return darwin_read_dyld_info (inf->priv->task, offset, readbuf, len, |
9b409511 | 2219 | xfered_len); |
569283d4 | 2220 | #endif |
f00c55f8 | 2221 | default: |
2ed4b548 | 2222 | return TARGET_XFER_E_IO; |
f00c55f8 | 2223 | } |
a80b95ba | 2224 | |
a80b95ba TG |
2225 | } |
2226 | ||
2227 | static void | |
2228 | set_enable_mach_exceptions (char *args, int from_tty, | |
2229 | struct cmd_list_element *c) | |
2230 | { | |
bb00b29d | 2231 | if (!ptid_equal (inferior_ptid, null_ptid)) |
a80b95ba | 2232 | { |
bb00b29d | 2233 | struct inferior *inf = current_inferior (); |
a80b95ba TG |
2234 | exception_mask_t mask; |
2235 | kern_return_t kret; | |
2236 | ||
2237 | if (enable_mach_exceptions) | |
2238 | mask = EXC_MASK_ALL; | |
2239 | else | |
2240 | { | |
fe978cb0 | 2241 | darwin_restore_exception_ports (inf->priv); |
bb00b29d | 2242 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
a80b95ba | 2243 | } |
fe978cb0 | 2244 | kret = task_set_exception_ports (inf->priv->task, mask, darwin_ex_port, |
a80b95ba TG |
2245 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2246 | MACH_CHECK_ERROR (kret); | |
2247 | } | |
2248 | } | |
2249 | ||
bb00b29d | 2250 | static char * |
8dd27370 | 2251 | darwin_pid_to_exec_file (struct target_ops *self, int pid) |
bb00b29d | 2252 | { |
b4ab256d | 2253 | static char path[PATH_MAX]; |
bb00b29d TG |
2254 | int res; |
2255 | ||
d8d2a3ee | 2256 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2257 | if (res >= 0) |
2258 | return path; | |
2259 | else | |
2260 | return NULL; | |
2261 | } | |
2262 | ||
2263 | static ptid_t | |
1e6b91a4 | 2264 | darwin_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) |
bb00b29d TG |
2265 | { |
2266 | int i; | |
2267 | darwin_thread_t *t; | |
2268 | int k; | |
2269 | struct inferior *inf = current_inferior (); | |
2270 | kern_return_t kret; | |
2271 | mach_port_name_array_t names; | |
2272 | mach_msg_type_number_t names_count; | |
2273 | mach_port_type_array_t types; | |
2274 | mach_msg_type_number_t types_count; | |
2275 | long res = 0; | |
2276 | ||
2277 | /* First linear search. */ | |
2278 | for (k = 0; | |
fe978cb0 | 2279 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
2280 | k++) |
2281 | if (t->inf_port == lwp) | |
2282 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); | |
2283 | ||
2284 | /* Maybe the port was never extract. Do it now. */ | |
2285 | ||
2286 | /* First get inferior port names. */ | |
fe978cb0 | 2287 | kret = mach_port_names (inf->priv->task, &names, &names_count, &types, |
bb00b29d TG |
2288 | &types_count); |
2289 | MACH_CHECK_ERROR (kret); | |
2290 | if (kret != KERN_SUCCESS) | |
2291 | return null_ptid; | |
2292 | ||
2293 | /* For each name, copy the right in the gdb space and then compare with | |
2294 | our view of the inferior threads. We don't forget to deallocate the | |
2295 | right. */ | |
2296 | for (i = 0; i < names_count; i++) | |
2297 | { | |
2298 | mach_port_t local_name; | |
2299 | mach_msg_type_name_t local_type; | |
2300 | ||
2301 | /* We just need to know the corresponding name in gdb name space. | |
2302 | So extract and deallocate the right. */ | |
fe978cb0 | 2303 | kret = mach_port_extract_right (inf->priv->task, names[i], |
bb00b29d TG |
2304 | MACH_MSG_TYPE_COPY_SEND, |
2305 | &local_name, &local_type); | |
2306 | if (kret != KERN_SUCCESS) | |
2307 | continue; | |
2308 | mach_port_deallocate (gdb_task, local_name); | |
2309 | ||
2310 | for (k = 0; | |
fe978cb0 | 2311 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
2312 | k++) |
2313 | if (t->gdb_port == local_name) | |
2314 | { | |
2315 | t->inf_port = names[i]; | |
2316 | if (names[i] == lwp) | |
2317 | res = t->gdb_port; | |
2318 | } | |
2319 | } | |
2320 | ||
2321 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2322 | names_count * sizeof (mach_port_t)); | |
2323 | ||
2324 | if (res) | |
2325 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); | |
2326 | else | |
2327 | return null_ptid; | |
2328 | } | |
2329 | ||
2330 | static int | |
86ce2668 | 2331 | darwin_supports_multi_process (struct target_ops *self) |
bb00b29d TG |
2332 | { |
2333 | return 1; | |
2334 | } | |
2335 | ||
c381a3f6 JB |
2336 | /* -Wmissing-prototypes */ |
2337 | extern initialize_file_ftype _initialize_darwin_inferior; | |
2338 | ||
a80b95ba | 2339 | void |
bb00b29d | 2340 | _initialize_darwin_inferior (void) |
a80b95ba TG |
2341 | { |
2342 | kern_return_t kret; | |
2343 | ||
a80b95ba TG |
2344 | gdb_task = mach_task_self (); |
2345 | darwin_host_self = mach_host_self (); | |
2346 | ||
2347 | /* Read page size. */ | |
2348 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2349 | if (kret != KERN_SUCCESS) | |
2350 | { | |
2351 | mach_page_size = 0x1000; | |
2352 | MACH_CHECK_ERROR (kret); | |
2353 | } | |
2354 | ||
a80b95ba TG |
2355 | darwin_ops = inf_child_target (); |
2356 | ||
a80b95ba TG |
2357 | darwin_ops->to_create_inferior = darwin_create_inferior; |
2358 | darwin_ops->to_attach = darwin_attach; | |
2359 | darwin_ops->to_attach_no_wait = 0; | |
2360 | darwin_ops->to_detach = darwin_detach; | |
2361 | darwin_ops->to_files_info = darwin_files_info; | |
bb00b29d | 2362 | darwin_ops->to_wait = darwin_wait_to; |
a80b95ba TG |
2363 | darwin_ops->to_mourn_inferior = darwin_mourn_inferior; |
2364 | darwin_ops->to_kill = darwin_kill_inferior; | |
bfedc46a | 2365 | darwin_ops->to_interrupt = darwin_interrupt; |
bb00b29d | 2366 | darwin_ops->to_resume = darwin_resume_to; |
a80b95ba TG |
2367 | darwin_ops->to_thread_alive = darwin_thread_alive; |
2368 | darwin_ops->to_pid_to_str = darwin_pid_to_str; | |
bb00b29d | 2369 | darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file; |
a80b95ba | 2370 | darwin_ops->to_load = NULL; |
a80b95ba | 2371 | darwin_ops->to_xfer_partial = darwin_xfer_partial; |
bb00b29d TG |
2372 | darwin_ops->to_supports_multi_process = darwin_supports_multi_process; |
2373 | darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid; | |
a80b95ba TG |
2374 | |
2375 | darwin_complete_target (darwin_ops); | |
2376 | ||
2377 | add_target (darwin_ops); | |
2378 | ||
3eb831e0 TG |
2379 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), |
2380 | (unsigned long) mach_task_self (), getpid ()); | |
a80b95ba | 2381 | |
ccce17b0 YQ |
2382 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2383 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2384 | Set if printing inferior communication debugging statements."), _("\ |
2385 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2386 | NULL, NULL, |
2387 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2388 | |
2389 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2390 | &enable_mach_exceptions, _("\ | |
2391 | Set if mach exceptions are caught."), _("\ | |
2392 | Show if mach exceptions are caught."), _("\ | |
2393 | When this mode is on, all low level exceptions are reported before being\n\ | |
2394 | reported by the kernel."), | |
2395 | &set_enable_mach_exceptions, NULL, | |
2396 | &setlist, &showlist); | |
2397 | } |