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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
42a4f53d | 2 | Copyright (C) 2008-2019 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" | |
4de283e4 TT |
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 "gdbcmd.h" | |
29 | #include "gdbcore.h" | |
30 | #include "gdbthread.h" | |
31 | #include "regcache.h" | |
32 | #include "event-top.h" | |
33 | #include "inf-loop.h" | |
34 | #include <sys/stat.h> | |
35 | #include "inf-child.h" | |
36 | #include "value.h" | |
37 | #include "arch-utils.h" | |
38 | #include "bfd.h" | |
39 | #include "bfd/mach-o.h" | |
a80b95ba | 40 | |
b50a8b9a | 41 | #include <copyfile.h> |
4de283e4 TT |
42 | #include <sys/ptrace.h> |
43 | #include <sys/signal.h> | |
44 | #include <setjmp.h> | |
45 | #include <sys/types.h> | |
46 | #include <unistd.h> | |
47 | #include <signal.h> | |
a80b95ba | 48 | #include <ctype.h> |
4de283e4 TT |
49 | #include <sys/sysctl.h> |
50 | #include <sys/proc.h> | |
bb00b29d | 51 | #include <libproc.h> |
4de283e4 TT |
52 | #include <sys/syscall.h> |
53 | #include <spawn.h> | |
54 | ||
a80b95ba | 55 | #include <mach/mach_error.h> |
d55e5aa6 | 56 | #include <mach/mach_vm.h> |
4de283e4 TT |
57 | #include <mach/mach_init.h> |
58 | #include <mach/vm_map.h> | |
d55e5aa6 | 59 | #include <mach/task.h> |
4de283e4 | 60 | #include <mach/mach_port.h> |
d55e5aa6 | 61 | #include <mach/thread_act.h> |
4de283e4 | 62 | #include <mach/port.h> |
a80b95ba | 63 | |
4de283e4 TT |
64 | #include "darwin-nat.h" |
65 | #include "filenames.h" | |
268a13a5 TT |
66 | #include "gdbsupport/filestuff.h" |
67 | #include "gdbsupport/gdb_unlinker.h" | |
68 | #include "gdbsupport/pathstuff.h" | |
69 | #include "gdbsupport/scoped_fd.h" | |
01ec7a27 | 70 | #include "nat/fork-inferior.h" |
a80b95ba TG |
71 | |
72 | /* Quick overview. | |
73 | Darwin kernel is Mach + BSD derived kernel. Note that they share the | |
74 | same memory space and are linked together (ie there is no micro-kernel). | |
75 | ||
76 | Although ptrace(2) is available on Darwin, it is not complete. We have | |
77 | to use Mach calls to read and write memory and to modify registers. We | |
78 | also use Mach to get inferior faults. As we cannot use select(2) or | |
79 | signals with Mach port (the Mach communication channel), signals are | |
80 | reported to gdb as an exception. Furthermore we detect death of the | |
81 | inferior through a Mach notification message. This way we only wait | |
82 | on Mach ports. | |
83 | ||
84 | Some Mach documentation is available for Apple xnu source package or | |
85 | from the web. */ | |
86 | ||
87 | ||
88 | #define PTRACE(CMD, PID, ADDR, SIG) \ | |
89 | darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG)) | |
90 | ||
bb00b29d TG |
91 | static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status); |
92 | ||
a80b95ba TG |
93 | static void darwin_ptrace_me (void); |
94 | ||
95 | static void darwin_ptrace_him (int pid); | |
96 | ||
a41f2563 TG |
97 | static void darwin_encode_reply (mig_reply_error_t *reply, |
98 | mach_msg_header_t *hdr, integer_t code); | |
99 | ||
82b19a4d TG |
100 | static void darwin_setup_request_notification (struct inferior *inf); |
101 | static void darwin_deallocate_exception_ports (darwin_inferior *inf); | |
102 | static void darwin_setup_exceptions (struct inferior *inf); | |
103 | static void darwin_deallocate_threads (struct inferior *inf); | |
104 | ||
a80b95ba TG |
105 | /* Task identifier of gdb. */ |
106 | static task_t gdb_task; | |
107 | ||
108 | /* A copy of mach_host_self (). */ | |
109 | mach_port_t darwin_host_self; | |
110 | ||
111 | /* Exception port. */ | |
112 | mach_port_t darwin_ex_port; | |
113 | ||
a6290449 | 114 | /* Port set, to wait for answer on all ports. */ |
a80b95ba TG |
115 | mach_port_t darwin_port_set; |
116 | ||
0963b4bd | 117 | /* Page size. */ |
a80b95ba TG |
118 | static vm_size_t mach_page_size; |
119 | ||
120 | /* If Set, catch all mach exceptions (before they are converted to signals | |
121 | by the kernel). */ | |
122 | static int enable_mach_exceptions; | |
123 | ||
bb00b29d TG |
124 | /* Inferior that should report a fake stop event. */ |
125 | static struct inferior *darwin_inf_fake_stop; | |
126 | ||
b50a8b9a TT |
127 | /* If non-NULL, the shell we actually invoke. See maybe_cache_shell |
128 | for details. */ | |
129 | static const char *copied_shell; | |
130 | ||
a80b95ba TG |
131 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
132 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
133 | ||
bb00b29d | 134 | /* This controls output of inferior debugging. */ |
ccce17b0 | 135 | static unsigned int darwin_debug_flag = 0; |
a80b95ba | 136 | |
15c19d39 TG |
137 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
138 | be signed. This is required to get an authorization for task_for_pid. | |
139 | ||
a6290449 TG |
140 | Once gdb is built, you must codesign it with any system-trusted signing |
141 | authority. See taskgated(8) for details. */ | |
15c19d39 TG |
142 | static const unsigned char info_plist[] |
143 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
144 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
145 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
146 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
147 | "<plist version=\"1.0\">\n" | |
148 | "<dict>\n" | |
149 | " <key>CFBundleIdentifier</key>\n" | |
150 | " <string>org.gnu.gdb</string>\n" | |
151 | " <key>CFBundleName</key>\n" | |
152 | " <string>gdb</string>\n" | |
153 | " <key>CFBundleVersion</key>\n" | |
154 | " <string>1.0</string>\n" | |
155 | " <key>SecTaskAccess</key>\n" | |
156 | " <array>\n" | |
157 | " <string>allowed</string>\n" | |
158 | " <string>debug</string>\n" | |
159 | " </array>\n" | |
160 | "</dict>\n" | |
161 | "</plist>\n"; | |
162 | ||
77b64a49 PA |
163 | static void inferior_debug (int level, const char *fmt, ...) |
164 | ATTRIBUTE_PRINTF (2, 3); | |
165 | ||
a80b95ba TG |
166 | static void |
167 | inferior_debug (int level, const char *fmt, ...) | |
168 | { | |
169 | va_list ap; | |
170 | ||
171 | if (darwin_debug_flag < level) | |
172 | return; | |
173 | ||
174 | va_start (ap, fmt); | |
175 | printf_unfiltered (_("[%d inferior]: "), getpid ()); | |
176 | vprintf_unfiltered (fmt, ap); | |
177 | va_end (ap); | |
178 | } | |
179 | ||
180 | void | |
181 | mach_check_error (kern_return_t ret, const char *file, | |
182 | unsigned int line, const char *func) | |
183 | { | |
184 | if (ret == KERN_SUCCESS) | |
185 | return; | |
186 | if (func == NULL) | |
187 | func = _("[UNKNOWN]"); | |
bb00b29d | 188 | |
4f1cdeec | 189 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 190 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
191 | } |
192 | ||
193 | static const char * | |
194 | unparse_exception_type (unsigned int i) | |
195 | { | |
196 | static char unknown_exception_buf[32]; | |
197 | ||
198 | switch (i) | |
199 | { | |
200 | case EXC_BAD_ACCESS: | |
201 | return "EXC_BAD_ACCESS"; | |
202 | case EXC_BAD_INSTRUCTION: | |
203 | return "EXC_BAD_INSTRUCTION"; | |
204 | case EXC_ARITHMETIC: | |
205 | return "EXC_ARITHMETIC"; | |
206 | case EXC_EMULATION: | |
207 | return "EXC_EMULATION"; | |
208 | case EXC_SOFTWARE: | |
209 | return "EXC_SOFTWARE"; | |
210 | case EXC_BREAKPOINT: | |
211 | return "EXC_BREAKPOINT"; | |
212 | case EXC_SYSCALL: | |
213 | return "EXC_SYSCALL"; | |
214 | case EXC_MACH_SYSCALL: | |
215 | return "EXC_MACH_SYSCALL"; | |
216 | case EXC_RPC_ALERT: | |
217 | return "EXC_RPC_ALERT"; | |
218 | case EXC_CRASH: | |
219 | return "EXC_CRASH"; | |
220 | default: | |
221 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
222 | return unknown_exception_buf; | |
223 | } | |
224 | } | |
225 | ||
a7aa0d73 JB |
226 | /* Set errno to zero, and then call ptrace with the given arguments. |
227 | If inferior debugging traces are on, then also print a debug | |
228 | trace. | |
229 | ||
230 | The returned value is the same as the value returned by ptrace, | |
231 | except in the case where that value is -1 but errno is zero. | |
232 | This case is documented to be a non-error situation, so we | |
233 | return zero in that case. */ | |
234 | ||
a80b95ba TG |
235 | static int |
236 | darwin_ptrace (const char *name, | |
aa14fb50 | 237 | int request, int pid, caddr_t arg3, int arg4) |
a80b95ba TG |
238 | { |
239 | int ret; | |
240 | ||
a7aa0d73 | 241 | errno = 0; |
aa14fb50 | 242 | ret = ptrace (request, pid, arg3, arg4); |
a7aa0d73 JB |
243 | if (ret == -1 && errno == 0) |
244 | ret = 0; | |
a80b95ba | 245 | |
3eb831e0 TG |
246 | inferior_debug (4, _("ptrace (%s, %d, 0x%lx, %d): %d (%s)\n"), |
247 | name, pid, (unsigned long) arg3, arg4, ret, | |
a3224241 | 248 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
249 | return ret; |
250 | } | |
251 | ||
252 | static int | |
253 | cmp_thread_t (const void *l, const void *r) | |
254 | { | |
bb00b29d TG |
255 | thread_t tl = *(const thread_t *)l; |
256 | thread_t tr = *(const thread_t *)r; | |
257 | return (int)(tl - tr); | |
a80b95ba TG |
258 | } |
259 | ||
260 | static void | |
bb00b29d | 261 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
262 | { |
263 | kern_return_t kret; | |
a80b95ba TG |
264 | thread_array_t thread_list; |
265 | unsigned int new_nbr; | |
266 | unsigned int old_nbr; | |
267 | unsigned int new_ix, old_ix; | |
089354bb SM |
268 | darwin_inferior *darwin_inf = get_darwin_inferior (inf); |
269 | std::vector<darwin_thread_t *> new_thread_vec; | |
a80b95ba | 270 | |
b5bddbbb TT |
271 | if (darwin_inf == nullptr) |
272 | return; | |
273 | ||
a80b95ba | 274 | /* Get list of threads. */ |
bb00b29d | 275 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
276 | MACH_CHECK_ERROR (kret); |
277 | if (kret != KERN_SUCCESS) | |
278 | return; | |
279 | ||
bb00b29d | 280 | /* Sort the list. */ |
a80b95ba TG |
281 | if (new_nbr > 1) |
282 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
283 | ||
089354bb | 284 | old_nbr = darwin_inf->threads.size (); |
a80b95ba | 285 | |
bb00b29d TG |
286 | /* Quick check for no changes. */ |
287 | if (old_nbr == new_nbr) | |
288 | { | |
089354bb SM |
289 | size_t i; |
290 | ||
bb00b29d | 291 | for (i = 0; i < new_nbr; i++) |
089354bb | 292 | if (thread_list[i] != darwin_inf->threads[i]->gdb_port) |
bb00b29d TG |
293 | break; |
294 | if (i == new_nbr) | |
295 | { | |
15a9128a TG |
296 | /* Deallocate ports. */ |
297 | for (i = 0; i < new_nbr; i++) | |
298 | { | |
299 | kret = mach_port_deallocate (mach_task_self (), thread_list[i]); | |
300 | MACH_CHECK_ERROR (kret); | |
301 | } | |
302 | ||
303 | /* Deallocate the buffer. */ | |
bb00b29d TG |
304 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
305 | new_nbr * sizeof (int)); | |
306 | MACH_CHECK_ERROR (kret); | |
15a9128a | 307 | |
bb00b29d TG |
308 | return; |
309 | } | |
310 | } | |
311 | ||
82b19a4d | 312 | /* Full handling: detect new threads, remove dead threads. */ |
089354bb SM |
313 | |
314 | new_thread_vec.reserve (new_nbr); | |
bb00b29d | 315 | |
a80b95ba TG |
316 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
317 | { | |
089354bb SM |
318 | thread_t new_id = (new_ix < new_nbr) ? thread_list[new_ix] : THREAD_NULL; |
319 | darwin_thread_t *old | |
320 | = (old_ix < old_nbr) ? darwin_inf->threads[old_ix] : NULL; | |
321 | thread_t old_id = old != NULL ? old->gdb_port : THREAD_NULL; | |
bb00b29d TG |
322 | |
323 | inferior_debug | |
c8c9911f | 324 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"), |
bb00b29d | 325 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
a80b95ba TG |
326 | |
327 | if (old_id == new_id) | |
328 | { | |
329 | /* Thread still exist. */ | |
089354bb | 330 | new_thread_vec.push_back (old); |
a80b95ba TG |
331 | new_ix++; |
332 | old_ix++; | |
333 | ||
15a9128a TG |
334 | /* Deallocate the port. */ |
335 | kret = mach_port_deallocate (gdb_task, new_id); | |
a80b95ba | 336 | MACH_CHECK_ERROR (kret); |
15a9128a | 337 | |
a80b95ba TG |
338 | continue; |
339 | } | |
bb00b29d TG |
340 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
341 | { | |
342 | /* Ignore dead ports. | |
343 | In some weird cases, we might get dead ports. They should | |
344 | correspond to dead thread so they could safely be ignored. */ | |
345 | new_ix++; | |
346 | continue; | |
347 | } | |
348 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
349 | { |
350 | /* A thread was created. */ | |
7aabaf9d | 351 | darwin_thread_info *pti = new darwin_thread_info; |
a80b95ba | 352 | |
bb00b29d TG |
353 | pti->gdb_port = new_id; |
354 | pti->msg_state = DARWIN_RUNNING; | |
355 | ||
db665f42 | 356 | /* Add the new thread. */ |
fd79271b | 357 | add_thread_with_info (ptid_t (inf->pid, 0, new_id), pti); |
089354bb | 358 | new_thread_vec.push_back (pti); |
a80b95ba TG |
359 | new_ix++; |
360 | continue; | |
361 | } | |
bb00b29d | 362 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
363 | { |
364 | /* A thread was removed. */ | |
b7a08269 | 365 | struct thread_info *thr |
fd79271b | 366 | = find_thread_ptid (ptid_t (inf->pid, 0, old_id)); |
b7a08269 | 367 | delete_thread (thr); |
a80b95ba TG |
368 | kret = mach_port_deallocate (gdb_task, old_id); |
369 | MACH_CHECK_ERROR (kret); | |
370 | old_ix++; | |
bb00b29d | 371 | continue; |
a80b95ba | 372 | } |
f3574227 | 373 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
374 | } |
375 | ||
089354bb | 376 | darwin_inf->threads = std::move (new_thread_vec); |
a80b95ba | 377 | |
15a9128a | 378 | /* Deallocate the buffer. */ |
a80b95ba TG |
379 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
380 | new_nbr * sizeof (int)); | |
381 | MACH_CHECK_ERROR (kret); | |
382 | } | |
383 | ||
bb00b29d TG |
384 | static int |
385 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 386 | { |
089354bb SM |
387 | darwin_inferior *priv = get_darwin_inferior (inf); |
388 | ||
b5bddbbb | 389 | return priv != nullptr && priv->task == *(task_t *)port_ptr; |
bb00b29d | 390 | } |
a80b95ba | 391 | |
bb00b29d | 392 | static int |
82b19a4d | 393 | find_inferior_pid_it (struct inferior *inf, void *pid_ptr) |
bb00b29d | 394 | { |
82b19a4d | 395 | return inf->pid == *(int *)pid_ptr; |
a80b95ba TG |
396 | } |
397 | ||
bb00b29d TG |
398 | /* Return an inferior by task port. */ |
399 | static struct inferior * | |
400 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 401 | { |
bb00b29d TG |
402 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
403 | } | |
a80b95ba | 404 | |
82b19a4d | 405 | /* Return an inferior by pid port. */ |
bb00b29d | 406 | static struct inferior * |
82b19a4d | 407 | darwin_find_inferior_by_pid (int pid) |
bb00b29d | 408 | { |
82b19a4d | 409 | return iterate_over_inferiors (&find_inferior_pid_it, &pid); |
bb00b29d | 410 | } |
a80b95ba | 411 | |
bb00b29d TG |
412 | /* Return a thread by port. */ |
413 | static darwin_thread_t * | |
414 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
415 | { | |
089354bb SM |
416 | darwin_inferior *priv = get_darwin_inferior (inf); |
417 | ||
b5bddbbb TT |
418 | if (priv != nullptr) |
419 | for (darwin_thread_t *t : priv->threads) | |
420 | { | |
421 | if (t->gdb_port == thread) | |
422 | return t; | |
423 | } | |
bb00b29d | 424 | |
bb00b29d TG |
425 | return NULL; |
426 | } | |
a80b95ba | 427 | |
bb00b29d | 428 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 429 | |
bb00b29d TG |
430 | static void |
431 | darwin_suspend_inferior (struct inferior *inf) | |
432 | { | |
089354bb SM |
433 | darwin_inferior *priv = get_darwin_inferior (inf); |
434 | ||
b5bddbbb | 435 | if (priv != nullptr && !priv->suspended) |
a80b95ba | 436 | { |
bb00b29d | 437 | kern_return_t kret; |
a80b95ba | 438 | |
089354bb | 439 | kret = task_suspend (priv->task); |
bb00b29d | 440 | MACH_CHECK_ERROR (kret); |
a80b95ba | 441 | |
089354bb | 442 | priv->suspended = 1; |
bb00b29d TG |
443 | } |
444 | } | |
a80b95ba | 445 | |
bb00b29d | 446 | /* Resume an inferior at Mach level. */ |
a80b95ba | 447 | |
bb00b29d TG |
448 | static void |
449 | darwin_resume_inferior (struct inferior *inf) | |
450 | { | |
089354bb SM |
451 | darwin_inferior *priv = get_darwin_inferior (inf); |
452 | ||
b5bddbbb | 453 | if (priv != nullptr && priv->suspended) |
bb00b29d TG |
454 | { |
455 | kern_return_t kret; | |
a80b95ba | 456 | |
089354bb | 457 | kret = task_resume (priv->task); |
bb00b29d TG |
458 | MACH_CHECK_ERROR (kret); |
459 | ||
089354bb | 460 | priv->suspended = 0; |
a80b95ba TG |
461 | } |
462 | } | |
463 | ||
bb00b29d TG |
464 | /* Iterator functions. */ |
465 | ||
466 | static int | |
467 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 468 | { |
bb00b29d TG |
469 | darwin_suspend_inferior (inf); |
470 | darwin_check_new_threads (inf); | |
471 | return 0; | |
472 | } | |
473 | ||
474 | static int | |
475 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
476 | { | |
477 | darwin_resume_inferior (inf); | |
478 | return 0; | |
a80b95ba TG |
479 | } |
480 | ||
bb00b29d TG |
481 | static void |
482 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
483 | { | |
484 | printf_unfiltered (_("message header:\n")); | |
485 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
486 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
487 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
488 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
489 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
490 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
491 | ||
492 | if (disp_body) | |
493 | { | |
494 | const unsigned char *data; | |
a6290449 | 495 | const unsigned int *ldata; |
bb00b29d TG |
496 | int size; |
497 | int i; | |
498 | ||
499 | data = (unsigned char *)(hdr + 1); | |
500 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
501 | ||
502 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
503 | { | |
504 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
505 | mach_msg_port_descriptor_t *desc = | |
506 | (mach_msg_port_descriptor_t *)(bod + 1); | |
507 | int k; | |
508 | NDR_record_t *ndr; | |
509 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
510 | bod->msgh_descriptor_count); | |
511 | data += sizeof (mach_msg_body_t); | |
512 | size -= sizeof (mach_msg_body_t); | |
513 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
514 | switch (desc[k].type) | |
515 | { | |
516 | case MACH_MSG_PORT_DESCRIPTOR: | |
517 | printf_unfiltered | |
518 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
519 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
520 | break; | |
521 | default: | |
522 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
523 | k, desc[k].type); | |
524 | break; | |
525 | } | |
526 | data += bod->msgh_descriptor_count | |
527 | * sizeof (mach_msg_port_descriptor_t); | |
528 | size -= bod->msgh_descriptor_count | |
529 | * sizeof (mach_msg_port_descriptor_t); | |
530 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
531 | printf_unfiltered | |
532 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
533 | "int=%02x char=%02x float=%02x\n"), | |
534 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
535 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
536 | data += sizeof (NDR_record_t); | |
537 | size -= sizeof (NDR_record_t); | |
538 | } | |
539 | ||
540 | printf_unfiltered (_(" data:")); | |
a6290449 TG |
541 | ldata = (const unsigned int *)data; |
542 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
543 | printf_unfiltered (" %08x", ldata[i]); | |
bb00b29d TG |
544 | printf_unfiltered (_("\n")); |
545 | } | |
546 | } | |
547 | ||
82b19a4d TG |
548 | /* Adjust inferior data when a new task was created. */ |
549 | ||
550 | static struct inferior * | |
551 | darwin_find_new_inferior (task_t task_port, thread_t thread_port) | |
552 | { | |
553 | int task_pid; | |
554 | struct inferior *inf; | |
555 | kern_return_t kret; | |
556 | mach_port_t prev; | |
557 | ||
558 | /* Find the corresponding pid. */ | |
559 | kret = pid_for_task (task_port, &task_pid); | |
560 | if (kret != KERN_SUCCESS) | |
561 | { | |
562 | MACH_CHECK_ERROR (kret); | |
563 | return NULL; | |
564 | } | |
565 | ||
566 | /* Find the inferior for this pid. */ | |
567 | inf = darwin_find_inferior_by_pid (task_pid); | |
568 | if (inf == NULL) | |
569 | return NULL; | |
570 | ||
089354bb SM |
571 | darwin_inferior *priv = get_darwin_inferior (inf); |
572 | ||
82b19a4d | 573 | /* Deallocate saved exception ports. */ |
089354bb | 574 | darwin_deallocate_exception_ports (priv); |
82b19a4d TG |
575 | |
576 | /* No need to remove dead_name notification, but still... */ | |
089354bb | 577 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d TG |
578 | MACH_NOTIFY_DEAD_NAME, 0, |
579 | MACH_PORT_NULL, | |
580 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
581 | &prev); | |
582 | if (kret != KERN_INVALID_ARGUMENT) | |
583 | MACH_CHECK_ERROR (kret); | |
584 | ||
585 | /* Replace old task port. */ | |
089354bb | 586 | kret = mach_port_deallocate (gdb_task, priv->task); |
82b19a4d | 587 | MACH_CHECK_ERROR (kret); |
089354bb | 588 | priv->task = task_port; |
82b19a4d TG |
589 | |
590 | darwin_setup_request_notification (inf); | |
591 | darwin_setup_exceptions (inf); | |
592 | ||
593 | return inf; | |
594 | } | |
595 | ||
596 | /* Check data representation. */ | |
597 | ||
598 | static int | |
599 | darwin_check_message_ndr (NDR_record_t *ndr) | |
600 | { | |
601 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
602 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
603 | || ndr->mig_encoding != NDR_record.mig_encoding | |
604 | || ndr->int_rep != NDR_record.int_rep | |
605 | || ndr->char_rep != NDR_record.char_rep | |
606 | || ndr->float_rep != NDR_record.float_rep) | |
607 | return -1; | |
608 | return 0; | |
609 | } | |
610 | ||
611 | /* Decode an exception message. */ | |
612 | ||
bb00b29d TG |
613 | static int |
614 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
615 | struct inferior **pinf, | |
616 | darwin_thread_t **pthread) | |
a80b95ba | 617 | { |
bb00b29d TG |
618 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
619 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
620 | NDR_record_t *ndr; | |
621 | integer_t *data; | |
622 | struct inferior *inf; | |
623 | darwin_thread_t *thread; | |
624 | task_t task_port; | |
625 | thread_t thread_port; | |
a80b95ba | 626 | kern_return_t kret; |
bb00b29d | 627 | int i; |
a80b95ba | 628 | |
a41f2563 TG |
629 | /* Check message destination. */ |
630 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
631 | return -1; |
632 | ||
633 | /* Check message header. */ | |
634 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
635 | return -1; | |
636 | ||
637 | /* Check descriptors. */ | |
638 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
639 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
640 | || bod->msgh_descriptor_count != 2 | |
641 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
642 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
643 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
644 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
645 | return -1; | |
646 | ||
647 | /* Check data representation. */ | |
648 | ndr = (NDR_record_t *)(desc + 2); | |
82b19a4d | 649 | if (darwin_check_message_ndr (ndr) != 0) |
bb00b29d TG |
650 | return -1; |
651 | ||
652 | /* Ok, the hard work. */ | |
653 | data = (integer_t *)(ndr + 1); | |
654 | ||
bb00b29d TG |
655 | task_port = desc[1].name; |
656 | thread_port = desc[0].name; | |
a41f2563 | 657 | |
a41f2563 | 658 | /* Find process by port. */ |
bb00b29d | 659 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 660 | *pinf = inf; |
82b19a4d TG |
661 | |
662 | if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2 | |
663 | && data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP) | |
664 | { | |
665 | /* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0, | |
666 | as a new Mach task is created when a process exec. */ | |
667 | inf = darwin_find_new_inferior (task_port, thread_port); | |
668 | *pinf = inf; | |
669 | ||
670 | if (inf == NULL) | |
671 | { | |
672 | /* Deallocate task_port, unless it was saved. */ | |
673 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
674 | MACH_CHECK_ERROR (kret); | |
675 | } | |
676 | } | |
677 | else | |
678 | { | |
679 | /* We got new rights to the task, get rid of it. Do not get rid of | |
680 | thread right, as we will need it to find the thread. */ | |
681 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
682 | MACH_CHECK_ERROR (kret); | |
683 | } | |
684 | ||
a41f2563 TG |
685 | if (inf == NULL) |
686 | { | |
687 | /* Not a known inferior. This could happen if the child fork, as | |
688 | the created process will inherit its exception port. | |
689 | FIXME: should the exception port be restored ? */ | |
a41f2563 TG |
690 | mig_reply_error_t reply; |
691 | ||
82b19a4d TG |
692 | inferior_debug |
693 | (4, _("darwin_decode_exception_message: unknown task 0x%x\n"), | |
694 | task_port); | |
695 | ||
15a9128a TG |
696 | /* Free thread port (we don't know it). */ |
697 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
698 | MACH_CHECK_ERROR (kret); | |
699 | ||
a41f2563 TG |
700 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); |
701 | ||
702 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
703 | reply.Head.msgh_size, 0, | |
704 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
705 | MACH_PORT_NULL); | |
706 | MACH_CHECK_ERROR (kret); | |
707 | ||
708 | return 0; | |
709 | } | |
bb00b29d TG |
710 | |
711 | /* Find thread by port. */ | |
712 | /* Check for new threads. Do it early so that the port in the exception | |
713 | message can be deallocated. */ | |
714 | darwin_check_new_threads (inf); | |
715 | ||
15a9128a TG |
716 | /* Free the thread port (as gdb knows the thread, it has already has a right |
717 | for it, so this just decrement a reference counter). */ | |
718 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
719 | MACH_CHECK_ERROR (kret); | |
720 | ||
bb00b29d TG |
721 | thread = darwin_find_thread (inf, thread_port); |
722 | if (thread == NULL) | |
723 | return -1; | |
724 | *pthread = thread; | |
725 | ||
a6290449 TG |
726 | /* The thread should be running. However we have observed cases where a |
727 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
728 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
729 | ||
bb00b29d | 730 | /* Finish decoding. */ |
bb00b29d TG |
731 | thread->event.header = *hdr; |
732 | thread->event.thread_port = thread_port; | |
733 | thread->event.task_port = task_port; | |
734 | thread->event.ex_type = data[0]; | |
735 | thread->event.data_count = data[1]; | |
736 | ||
737 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
738 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
739 | + data[1] * sizeof (integer_t))) | |
740 | return -1; | |
741 | for (i = 0; i < data[1]; i++) | |
742 | thread->event.ex_data[i] = data[2 + i]; | |
743 | ||
744 | thread->msg_state = DARWIN_MESSAGE; | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
82b19a4d TG |
749 | /* Decode dead_name notify message. */ |
750 | ||
751 | static int | |
752 | darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf) | |
753 | { | |
754 | NDR_record_t *ndr = (NDR_record_t *)(hdr + 1); | |
755 | integer_t *data = (integer_t *)(ndr + 1); | |
756 | struct inferior *inf; | |
82b19a4d | 757 | task_t task_port; |
82b19a4d TG |
758 | |
759 | /* Check message header. */ | |
760 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
761 | return -1; | |
762 | ||
763 | /* Check descriptors. */ | |
764 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t))) | |
765 | return -2; | |
766 | ||
767 | /* Check data representation. */ | |
768 | if (darwin_check_message_ndr (ndr) != 0) | |
769 | return -3; | |
770 | ||
771 | task_port = data[0]; | |
772 | ||
773 | /* Find process by port. */ | |
774 | inf = darwin_find_inferior_by_task (task_port); | |
775 | *pinf = inf; | |
776 | ||
777 | /* Check message destination. */ | |
b5bddbbb TT |
778 | if (inf != NULL) |
779 | { | |
780 | darwin_inferior *priv = get_darwin_inferior (inf); | |
781 | if (hdr->msgh_local_port != priv->notify_port) | |
782 | return -4; | |
783 | } | |
82b19a4d TG |
784 | |
785 | return 0; | |
786 | } | |
787 | ||
bb00b29d TG |
788 | static void |
789 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
790 | integer_t code) | |
791 | { | |
792 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
793 | |
794 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 795 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 796 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
797 | rh->msgh_local_port = MACH_PORT_NULL; |
798 | rh->msgh_id = hdr->msgh_id + 100; | |
799 | ||
800 | reply->NDR = NDR_record; | |
801 | reply->RetCode = code; | |
a80b95ba TG |
802 | } |
803 | ||
bb00b29d TG |
804 | static void |
805 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
806 | { |
807 | kern_return_t kret; | |
bb00b29d | 808 | mig_reply_error_t reply; |
089354bb | 809 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 810 | |
bb00b29d TG |
811 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
812 | ||
813 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
814 | reply.Head.msgh_size, 0, | |
815 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
816 | MACH_PORT_NULL); | |
a80b95ba TG |
817 | MACH_CHECK_ERROR (kret); |
818 | ||
089354bb | 819 | priv->pending_messages--; |
bb00b29d TG |
820 | } |
821 | ||
6821842f SM |
822 | /* Wrapper around the __pthread_kill syscall. We use this instead of the |
823 | pthread_kill function to be able to send a signal to any kind of thread, | |
824 | including GCD threads. */ | |
825 | ||
826 | static int | |
827 | darwin_pthread_kill (darwin_thread_t *thread, int nsignal) | |
828 | { | |
829 | DIAGNOSTIC_PUSH; | |
830 | DIAGNOSTIC_IGNORE_DEPRECATED_DECLARATIONS; | |
831 | int res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
832 | DIAGNOSTIC_POP; | |
833 | return res; | |
834 | } | |
835 | ||
bb00b29d TG |
836 | static void |
837 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
838 | int step, int nsignal) | |
839 | { | |
a80b95ba | 840 | inferior_debug |
bb00b29d TG |
841 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
842 | thread->msg_state, thread->gdb_port, step, nsignal); | |
843 | ||
844 | switch (thread->msg_state) | |
a80b95ba | 845 | { |
bb00b29d TG |
846 | case DARWIN_MESSAGE: |
847 | if (thread->event.ex_type == EXC_SOFTWARE | |
848 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
849 | { | |
850 | /* Either deliver a new signal or cancel the signal received. */ | |
6821842f SM |
851 | int res = PTRACE (PT_THUPDATE, inf->pid, |
852 | (caddr_t) (uintptr_t) thread->gdb_port, nsignal); | |
bb00b29d TG |
853 | if (res < 0) |
854 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
855 | } | |
856 | else if (nsignal) | |
857 | { | |
858 | /* Note: ptrace is allowed only if the process is stopped. | |
859 | Directly send the signal to the thread. */ | |
6821842f | 860 | int res = darwin_pthread_kill (thread, nsignal); |
bb00b29d TG |
861 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), |
862 | thread->gdb_port, nsignal, res); | |
863 | thread->signaled = 1; | |
864 | } | |
865 | ||
d987a266 | 866 | /* Set or reset single step. */ |
aa14fb50 TG |
867 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
868 | thread->gdb_port, step); | |
869 | darwin_set_sstep (thread->gdb_port, step); | |
870 | thread->single_step = step; | |
bb00b29d TG |
871 | |
872 | darwin_send_reply (inf, thread); | |
873 | thread->msg_state = DARWIN_RUNNING; | |
874 | break; | |
875 | ||
876 | case DARWIN_RUNNING: | |
877 | break; | |
878 | ||
879 | case DARWIN_STOPPED: | |
6821842f | 880 | kern_return_t kret = thread_resume (thread->gdb_port); |
bb00b29d TG |
881 | MACH_CHECK_ERROR (kret); |
882 | ||
883 | thread->msg_state = DARWIN_RUNNING; | |
884 | break; | |
a80b95ba | 885 | } |
bb00b29d | 886 | } |
a80b95ba | 887 | |
bb00b29d | 888 | /* Resume all threads of the inferior. */ |
a80b95ba | 889 | |
bb00b29d TG |
890 | static void |
891 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
892 | { | |
089354bb | 893 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 894 | |
b5bddbbb TT |
895 | if (priv != nullptr) |
896 | for (darwin_thread_t *thread : priv->threads) | |
897 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
898 | } |
899 | ||
bb00b29d | 900 | struct resume_inferior_threads_param |
a80b95ba | 901 | { |
bb00b29d TG |
902 | int step; |
903 | int nsignal; | |
904 | }; | |
905 | ||
906 | static int | |
907 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
908 | { | |
909 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
910 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
911 | ||
912 | darwin_resume_inferior_threads (inf, step, nsignal); | |
913 | ||
914 | return 0; | |
915 | } | |
916 | ||
917 | /* Suspend all threads of INF. */ | |
918 | ||
919 | static void | |
920 | darwin_suspend_inferior_threads (struct inferior *inf) | |
921 | { | |
089354bb | 922 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 923 | |
089354bb SM |
924 | for (darwin_thread_t *thread : priv->threads) |
925 | { | |
926 | switch (thread->msg_state) | |
927 | { | |
928 | case DARWIN_STOPPED: | |
929 | case DARWIN_MESSAGE: | |
930 | break; | |
931 | case DARWIN_RUNNING: | |
932 | { | |
933 | kern_return_t kret = thread_suspend (thread->gdb_port); | |
934 | MACH_CHECK_ERROR (kret); | |
935 | thread->msg_state = DARWIN_STOPPED; | |
936 | break; | |
937 | } | |
938 | } | |
939 | } | |
bb00b29d | 940 | } |
a80b95ba | 941 | |
f6ac5f3d PA |
942 | void |
943 | darwin_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signal) | |
bb00b29d TG |
944 | { |
945 | struct target_waitstatus status; | |
a80b95ba | 946 | |
bb00b29d | 947 | int nsignal; |
a80b95ba | 948 | |
bb00b29d | 949 | inferior_debug |
3eb831e0 | 950 | (2, _("darwin_resume: pid=%d, tid=0x%lx, step=%d, signal=%d\n"), |
cc6bcb54 | 951 | ptid.pid (), ptid.tid (), step, signal); |
bb00b29d | 952 | |
a493e3e2 | 953 | if (signal == GDB_SIGNAL_0) |
bb00b29d TG |
954 | nsignal = 0; |
955 | else | |
2ea28649 | 956 | nsignal = gdb_signal_to_host (signal); |
a80b95ba | 957 | |
bb00b29d TG |
958 | /* Don't try to single step all threads. */ |
959 | if (step) | |
960 | ptid = inferior_ptid; | |
961 | ||
962 | /* minus_one_ptid is RESUME_ALL. */ | |
d7e15655 | 963 | if (ptid == minus_one_ptid) |
a80b95ba | 964 | { |
bb00b29d TG |
965 | struct resume_inferior_threads_param param; |
966 | ||
967 | param.nsignal = nsignal; | |
968 | param.step = step; | |
a80b95ba | 969 | |
bb00b29d TG |
970 | /* Resume threads. */ |
971 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
972 | /* Resume tasks. */ | |
973 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
974 | } | |
975 | else | |
a80b95ba | 976 | { |
c9657e70 | 977 | struct inferior *inf = find_inferior_ptid (ptid); |
cc6bcb54 | 978 | long tid = ptid.tid (); |
bb00b29d TG |
979 | |
980 | /* Stop the inferior (should be useless). */ | |
981 | darwin_suspend_inferior (inf); | |
982 | ||
983 | if (tid == 0) | |
984 | darwin_resume_inferior_threads (inf, step, nsignal); | |
985 | else | |
986 | { | |
987 | darwin_thread_t *thread; | |
988 | ||
989 | /* Suspend threads of the task. */ | |
990 | darwin_suspend_inferior_threads (inf); | |
991 | ||
992 | /* Resume the selected thread. */ | |
993 | thread = darwin_find_thread (inf, tid); | |
994 | gdb_assert (thread); | |
995 | darwin_resume_thread (inf, thread, step, nsignal); | |
996 | } | |
997 | ||
998 | /* Resume the task. */ | |
999 | darwin_resume_inferior (inf); | |
a80b95ba | 1000 | } |
bb00b29d | 1001 | } |
a80b95ba | 1002 | |
bb00b29d TG |
1003 | static ptid_t |
1004 | darwin_decode_message (mach_msg_header_t *hdr, | |
1005 | darwin_thread_t **pthread, | |
1006 | struct inferior **pinf, | |
1007 | struct target_waitstatus *status) | |
1008 | { | |
1009 | darwin_thread_t *thread; | |
1010 | struct inferior *inf; | |
a80b95ba | 1011 | |
a41f2563 TG |
1012 | /* Exception message. 2401 == 0x961 is exc. */ |
1013 | if (hdr->msgh_id == 2401) | |
a80b95ba | 1014 | { |
bb00b29d TG |
1015 | int res; |
1016 | ||
1017 | /* Decode message. */ | |
1018 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
1019 | ||
1020 | if (res < 0) | |
a80b95ba | 1021 | { |
bb00b29d | 1022 | /* Should not happen... */ |
c8c9911f JB |
1023 | printf_unfiltered |
1024 | (_("darwin_wait: ill-formatted message (id=0x%x)\n"), hdr->msgh_id); | |
bb00b29d | 1025 | /* FIXME: send a failure reply? */ |
a41f2563 TG |
1026 | status->kind = TARGET_WAITKIND_IGNORE; |
1027 | return minus_one_ptid; | |
1028 | } | |
1029 | if (inf == NULL) | |
1030 | { | |
1031 | status->kind = TARGET_WAITKIND_IGNORE; | |
a80b95ba TG |
1032 | return minus_one_ptid; |
1033 | } | |
bb00b29d TG |
1034 | *pinf = inf; |
1035 | *pthread = thread; | |
089354bb SM |
1036 | |
1037 | darwin_inferior *priv = get_darwin_inferior (inf); | |
1038 | ||
1039 | priv->pending_messages++; | |
a80b95ba TG |
1040 | |
1041 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
1042 | thread->msg_state = DARWIN_MESSAGE; |
1043 | ||
c8c9911f | 1044 | inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"), |
bb00b29d TG |
1045 | thread->gdb_port, |
1046 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 1047 | |
bb00b29d | 1048 | switch (thread->event.ex_type) |
a80b95ba TG |
1049 | { |
1050 | case EXC_BAD_ACCESS: | |
4e225075 | 1051 | status->value.sig = GDB_EXC_BAD_ACCESS; |
a80b95ba TG |
1052 | break; |
1053 | case EXC_BAD_INSTRUCTION: | |
4e225075 | 1054 | status->value.sig = GDB_EXC_BAD_INSTRUCTION; |
a80b95ba TG |
1055 | break; |
1056 | case EXC_ARITHMETIC: | |
4e225075 | 1057 | status->value.sig = GDB_EXC_ARITHMETIC; |
a80b95ba TG |
1058 | break; |
1059 | case EXC_EMULATION: | |
4e225075 | 1060 | status->value.sig = GDB_EXC_EMULATION; |
a80b95ba TG |
1061 | break; |
1062 | case EXC_SOFTWARE: | |
bb00b29d | 1063 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 1064 | { |
bb00b29d | 1065 | status->value.sig = |
2ea28649 | 1066 | gdb_signal_from_host (thread->event.ex_data[1]); |
bb00b29d TG |
1067 | inferior_debug (5, _(" (signal %d: %s)\n"), |
1068 | thread->event.ex_data[1], | |
2ea28649 | 1069 | gdb_signal_to_name (status->value.sig)); |
bb00b29d TG |
1070 | |
1071 | /* If the thread is stopped because it has received a signal | |
1072 | that gdb has just sent, continue. */ | |
1073 | if (thread->signaled) | |
1074 | { | |
1075 | thread->signaled = 0; | |
1076 | darwin_send_reply (inf, thread); | |
1077 | thread->msg_state = DARWIN_RUNNING; | |
1078 | status->kind = TARGET_WAITKIND_IGNORE; | |
1079 | } | |
a80b95ba TG |
1080 | } |
1081 | else | |
4e225075 | 1082 | status->value.sig = GDB_EXC_SOFTWARE; |
a80b95ba TG |
1083 | break; |
1084 | case EXC_BREAKPOINT: | |
1085 | /* Many internal GDB routines expect breakpoints to be reported | |
4e225075 | 1086 | as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT |
0963b4bd | 1087 | as a spurious signal. */ |
a493e3e2 | 1088 | status->value.sig = GDB_SIGNAL_TRAP; |
a80b95ba TG |
1089 | break; |
1090 | default: | |
a493e3e2 | 1091 | status->value.sig = GDB_SIGNAL_UNKNOWN; |
a80b95ba TG |
1092 | break; |
1093 | } | |
1094 | ||
fd79271b | 1095 | return ptid_t (inf->pid, 0, thread->gdb_port); |
bb00b29d | 1096 | } |
a41f2563 | 1097 | else if (hdr->msgh_id == 0x48) |
bb00b29d | 1098 | { |
a41f2563 | 1099 | /* MACH_NOTIFY_DEAD_NAME: notification for exit. */ |
82b19a4d TG |
1100 | int res; |
1101 | ||
1102 | res = darwin_decode_notify_message (hdr, &inf); | |
1103 | ||
1104 | if (res < 0) | |
1105 | { | |
1106 | /* Should not happen... */ | |
1107 | printf_unfiltered | |
1108 | (_("darwin_wait: ill-formatted message (id=0x%x, res=%d)\n"), | |
1109 | hdr->msgh_id, res); | |
1110 | } | |
1111 | ||
a41f2563 TG |
1112 | *pinf = NULL; |
1113 | *pthread = NULL; | |
bb00b29d | 1114 | |
82b19a4d TG |
1115 | if (res < 0 || inf == NULL) |
1116 | { | |
1117 | status->kind = TARGET_WAITKIND_IGNORE; | |
1118 | return minus_one_ptid; | |
1119 | } | |
1120 | ||
a41f2563 TG |
1121 | if (inf != NULL) |
1122 | { | |
089354bb SM |
1123 | darwin_inferior *priv = get_darwin_inferior (inf); |
1124 | ||
1125 | if (!priv->no_ptrace) | |
bb00b29d | 1126 | { |
86108c13 | 1127 | pid_t res_pid; |
a41f2563 TG |
1128 | int wstatus; |
1129 | ||
86108c13 TT |
1130 | res_pid = wait4 (inf->pid, &wstatus, 0, NULL); |
1131 | if (res_pid < 0 || res_pid != inf->pid) | |
a41f2563 TG |
1132 | { |
1133 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
86108c13 | 1134 | res_pid, safe_strerror (errno)); |
a41f2563 TG |
1135 | status->kind = TARGET_WAITKIND_IGNORE; |
1136 | return minus_one_ptid; | |
1137 | } | |
1138 | if (WIFEXITED (wstatus)) | |
1139 | { | |
1140 | status->kind = TARGET_WAITKIND_EXITED; | |
1141 | status->value.integer = WEXITSTATUS (wstatus); | |
1142 | } | |
1143 | else | |
1144 | { | |
1145 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
5ae00552 | 1146 | status->value.sig = gdb_signal_from_host (WTERMSIG (wstatus)); |
a41f2563 TG |
1147 | } |
1148 | ||
1149 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"), | |
86108c13 | 1150 | res_pid, wstatus); |
a41f2563 TG |
1151 | |
1152 | /* Looks necessary on Leopard and harmless... */ | |
1153 | wait4 (inf->pid, &wstatus, 0, NULL); | |
1154 | ||
fd79271b | 1155 | inferior_ptid = ptid_t (inf->pid, 0, 0); |
82b19a4d | 1156 | return inferior_ptid; |
bb00b29d TG |
1157 | } |
1158 | else | |
1159 | { | |
a41f2563 TG |
1160 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
1161 | status->kind = TARGET_WAITKIND_EXITED; | |
1162 | status->value.integer = 0; /* Don't know. */ | |
fd79271b | 1163 | return ptid_t (inf->pid, 0, 0); |
bb00b29d | 1164 | } |
bb00b29d TG |
1165 | } |
1166 | } | |
1167 | ||
a41f2563 | 1168 | /* Unknown message. */ |
86ad98c3 | 1169 | warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id); |
a41f2563 | 1170 | status->kind = TARGET_WAITKIND_IGNORE; |
bb00b29d TG |
1171 | return minus_one_ptid; |
1172 | } | |
1173 | ||
1174 | static int | |
1175 | cancel_breakpoint (ptid_t ptid) | |
1176 | { | |
0963b4bd | 1177 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1178 | the current event, eventually we will resume this thread, and this |
1179 | breakpoint will trap again. | |
1180 | ||
1181 | If we do not do this, then we run the risk that the user will | |
1182 | delete or disable the breakpoint, but the thread will have already | |
1183 | tripped on it. */ | |
1184 | ||
1185 | struct regcache *regcache = get_thread_regcache (ptid); | |
ac7936df | 1186 | struct gdbarch *gdbarch = regcache->arch (); |
bb00b29d | 1187 | CORE_ADDR pc; |
a80b95ba | 1188 | |
527a273a | 1189 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
a01bda52 | 1190 | if (breakpoint_inserted_here_p (regcache->aspace (), pc)) |
bb00b29d | 1191 | { |
3eb831e0 | 1192 | inferior_debug (4, "cancel_breakpoint for thread 0x%lx\n", |
cc6bcb54 | 1193 | (unsigned long) ptid.tid ()); |
bb00b29d TG |
1194 | |
1195 | /* Back up the PC if necessary. */ | |
527a273a | 1196 | if (gdbarch_decr_pc_after_break (gdbarch)) |
bb00b29d TG |
1197 | regcache_write_pc (regcache, pc); |
1198 | ||
1199 | return 1; | |
a80b95ba | 1200 | } |
bb00b29d TG |
1201 | return 0; |
1202 | } | |
1203 | ||
1204 | static ptid_t | |
1205 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1206 | { | |
1207 | kern_return_t kret; | |
1208 | union | |
1209 | { | |
1210 | mach_msg_header_t hdr; | |
1211 | char data[0x100]; | |
1212 | } msgin; | |
1213 | mach_msg_header_t *hdr = &msgin.hdr; | |
1214 | ptid_t res; | |
1215 | darwin_thread_t *thread; | |
1216 | struct inferior *inf; | |
1217 | ||
1218 | inferior_debug | |
1219 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
cc6bcb54 | 1220 | ptid.pid (), ptid.tid ()); |
bb00b29d TG |
1221 | |
1222 | /* Handle fake stop events at first. */ | |
1223 | if (darwin_inf_fake_stop != NULL) | |
1224 | { | |
1225 | inf = darwin_inf_fake_stop; | |
1226 | darwin_inf_fake_stop = NULL; | |
1227 | ||
089354bb SM |
1228 | darwin_inferior *priv = get_darwin_inferior (inf); |
1229 | ||
bb00b29d | 1230 | status->kind = TARGET_WAITKIND_STOPPED; |
a493e3e2 | 1231 | status->value.sig = GDB_SIGNAL_TRAP; |
089354bb | 1232 | thread = priv->threads[0]; |
bb00b29d | 1233 | thread->msg_state = DARWIN_STOPPED; |
fd79271b | 1234 | return ptid_t (inf->pid, 0, thread->gdb_port); |
bb00b29d TG |
1235 | } |
1236 | ||
1237 | do | |
1238 | { | |
1239 | /* set_sigint_trap (); */ | |
1240 | ||
1241 | /* Wait for a message. */ | |
1242 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1243 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1244 | ||
1245 | /* clear_sigint_trap (); */ | |
1246 | ||
1247 | if (kret == MACH_RCV_INTERRUPTED) | |
1248 | { | |
1249 | status->kind = TARGET_WAITKIND_IGNORE; | |
1250 | return minus_one_ptid; | |
1251 | } | |
1252 | ||
1253 | if (kret != MACH_MSG_SUCCESS) | |
1254 | { | |
c8c9911f | 1255 | inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret); |
bb00b29d TG |
1256 | status->kind = TARGET_WAITKIND_SPURIOUS; |
1257 | return minus_one_ptid; | |
1258 | } | |
1259 | ||
1260 | /* Debug: display message. */ | |
1261 | if (darwin_debug_flag > 10) | |
1262 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1263 | ||
1264 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
d7e15655 | 1265 | if (res == minus_one_ptid) |
a41f2563 | 1266 | continue; |
bb00b29d | 1267 | |
a41f2563 | 1268 | /* Early return in case an inferior has exited. */ |
bb00b29d TG |
1269 | if (inf == NULL) |
1270 | return res; | |
1271 | } | |
1272 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1273 | ||
1274 | /* Stop all tasks. */ | |
1275 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1276 | ||
1277 | /* Read pending messages. */ | |
1278 | while (1) | |
a80b95ba | 1279 | { |
bb00b29d TG |
1280 | struct target_waitstatus status2; |
1281 | ptid_t ptid2; | |
1282 | ||
1283 | kret = mach_msg (&msgin.hdr, | |
1284 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1285 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1286 | ||
1287 | if (kret == MACH_RCV_TIMED_OUT) | |
1288 | break; | |
1289 | if (kret != MACH_MSG_SUCCESS) | |
1290 | { | |
1291 | inferior_debug | |
c8c9911f | 1292 | (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret); |
bb00b29d TG |
1293 | break; |
1294 | } | |
1295 | ||
a41f2563 TG |
1296 | /* Debug: display message. */ |
1297 | if (darwin_debug_flag > 10) | |
1298 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1299 | ||
bb00b29d | 1300 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); |
a80b95ba | 1301 | |
bb00b29d TG |
1302 | if (inf != NULL && thread != NULL |
1303 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1304 | { |
bb00b29d | 1305 | if (thread->single_step |
fd79271b | 1306 | || cancel_breakpoint (ptid_t (inf->pid, 0, thread->gdb_port))) |
bb00b29d TG |
1307 | { |
1308 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1309 | darwin_send_reply (inf, thread); | |
1310 | thread->msg_state = DARWIN_RUNNING; | |
1311 | } | |
1312 | else | |
1313 | inferior_debug | |
c8c9911f | 1314 | (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"), |
bb00b29d | 1315 | thread->gdb_port); |
a80b95ba | 1316 | } |
bb00b29d TG |
1317 | else |
1318 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1319 | } | |
1320 | return res; | |
1321 | } | |
a80b95ba | 1322 | |
f6ac5f3d PA |
1323 | ptid_t |
1324 | darwin_nat_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
1325 | int options) | |
bb00b29d TG |
1326 | { |
1327 | return darwin_wait (ptid, status); | |
1328 | } | |
a80b95ba | 1329 | |
f6ac5f3d PA |
1330 | void |
1331 | darwin_nat_target::interrupt () | |
bb00b29d TG |
1332 | { |
1333 | struct inferior *inf = current_inferior (); | |
089354bb | 1334 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1335 | |
bb00b29d | 1336 | /* FIXME: handle in no_ptrace mode. */ |
089354bb | 1337 | gdb_assert (!priv->no_ptrace); |
f6ac5f3d | 1338 | ::kill (inf->pid, SIGINT); |
a80b95ba TG |
1339 | } |
1340 | ||
82b19a4d TG |
1341 | /* Deallocate threads port and vector. */ |
1342 | ||
a80b95ba | 1343 | static void |
82b19a4d | 1344 | darwin_deallocate_threads (struct inferior *inf) |
a80b95ba | 1345 | { |
089354bb SM |
1346 | darwin_inferior *priv = get_darwin_inferior (inf); |
1347 | ||
1348 | for (darwin_thread_t *t : priv->threads) | |
a80b95ba | 1349 | { |
089354bb SM |
1350 | kern_return_t kret = mach_port_deallocate (gdb_task, t->gdb_port); |
1351 | MACH_CHECK_ERROR (kret); | |
a80b95ba | 1352 | } |
089354bb SM |
1353 | |
1354 | priv->threads.clear (); | |
82b19a4d | 1355 | } |
a80b95ba | 1356 | |
f6ac5f3d PA |
1357 | void |
1358 | darwin_nat_target::mourn_inferior () | |
82b19a4d TG |
1359 | { |
1360 | struct inferior *inf = current_inferior (); | |
089354bb | 1361 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1362 | kern_return_t kret; |
1363 | mach_port_t prev; | |
82b19a4d TG |
1364 | |
1365 | /* Deallocate threads. */ | |
1366 | darwin_deallocate_threads (inf); | |
1367 | ||
1368 | /* Remove notify_port from darwin_port_set. */ | |
bb00b29d | 1369 | kret = mach_port_move_member (gdb_task, |
089354bb | 1370 | priv->notify_port, MACH_PORT_NULL); |
fda184b6 | 1371 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1372 | |
82b19a4d | 1373 | /* Remove task port dead_name notification. */ |
089354bb | 1374 | kret = mach_port_request_notification (gdb_task, priv->task, |
a80b95ba | 1375 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1376 | MACH_PORT_NULL, |
a80b95ba TG |
1377 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1378 | &prev); | |
1379 | /* This can fail if the task is dead. */ | |
c8c9911f | 1380 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
089354bb | 1381 | priv->task, prev, priv->notify_port); |
bb00b29d | 1382 | |
a80b95ba TG |
1383 | if (kret == KERN_SUCCESS) |
1384 | { | |
1385 | kret = mach_port_deallocate (gdb_task, prev); | |
1386 | MACH_CHECK_ERROR (kret); | |
1387 | } | |
1388 | ||
82b19a4d | 1389 | /* Destroy notify_port. */ |
089354bb | 1390 | kret = mach_port_destroy (gdb_task, priv->notify_port); |
bb00b29d TG |
1391 | MACH_CHECK_ERROR (kret); |
1392 | ||
a80b95ba | 1393 | /* Deallocate saved exception ports. */ |
089354bb | 1394 | darwin_deallocate_exception_ports (priv); |
a80b95ba | 1395 | |
82b19a4d | 1396 | /* Deallocate task port. */ |
089354bb | 1397 | kret = mach_port_deallocate (gdb_task, priv->task); |
a80b95ba TG |
1398 | MACH_CHECK_ERROR (kret); |
1399 | ||
fe978cb0 | 1400 | inf->priv = NULL; |
a80b95ba | 1401 | |
f6ac5f3d | 1402 | inf_child_target::mourn_inferior (); |
a80b95ba TG |
1403 | } |
1404 | ||
1405 | static void | |
bb00b29d | 1406 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1407 | { |
089354bb | 1408 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1409 | |
089354bb | 1410 | for (darwin_thread_t *t : priv->threads) |
bb00b29d TG |
1411 | { |
1412 | if (t->msg_state == DARWIN_MESSAGE) | |
1413 | darwin_resume_thread (inf, t, 0, 0); | |
1414 | } | |
a80b95ba TG |
1415 | } |
1416 | ||
1417 | static void | |
bb00b29d | 1418 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1419 | { |
1420 | struct target_waitstatus wstatus; | |
1421 | ptid_t ptid; | |
a80b95ba | 1422 | int res; |
089354bb | 1423 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1424 | |
bb00b29d | 1425 | gdb_assert (inf != NULL); |
a80b95ba | 1426 | |
bb00b29d | 1427 | darwin_suspend_inferior (inf); |
a80b95ba | 1428 | |
bb00b29d | 1429 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1430 | |
089354bb | 1431 | if (priv->no_ptrace) |
bb00b29d | 1432 | return; |
a80b95ba | 1433 | |
bb00b29d TG |
1434 | res = kill (inf->pid, SIGSTOP); |
1435 | if (res != 0) | |
b37520b6 | 1436 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1437 | |
bb00b29d TG |
1438 | /* Wait until the process is really stopped. */ |
1439 | while (1) | |
a80b95ba | 1440 | { |
bb00b29d TG |
1441 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1442 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 1443 | && wstatus.value.sig == GDB_SIGNAL_STOP) |
bb00b29d | 1444 | break; |
a80b95ba TG |
1445 | } |
1446 | } | |
1447 | ||
1448 | static kern_return_t | |
1449 | darwin_save_exception_ports (darwin_inferior *inf) | |
1450 | { | |
1451 | kern_return_t kret; | |
1452 | ||
1453 | inf->exception_info.count = | |
1454 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1455 | ||
1456 | kret = task_get_exception_ports | |
1457 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1458 | &inf->exception_info.count, inf->exception_info.ports, | |
1459 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1460 | return kret; | |
1461 | } | |
1462 | ||
1463 | static kern_return_t | |
1464 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1465 | { | |
1466 | int i; | |
1467 | kern_return_t kret; | |
1468 | ||
1469 | for (i = 0; i < inf->exception_info.count; i++) | |
1470 | { | |
1471 | kret = task_set_exception_ports | |
1472 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1473 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1474 | if (kret != KERN_SUCCESS) | |
1475 | return kret; | |
1476 | } | |
1477 | ||
1478 | return KERN_SUCCESS; | |
1479 | } | |
1480 | ||
82b19a4d TG |
1481 | /* Deallocate saved exception ports. */ |
1482 | ||
1483 | static void | |
1484 | darwin_deallocate_exception_ports (darwin_inferior *inf) | |
1485 | { | |
1486 | int i; | |
1487 | kern_return_t kret; | |
1488 | ||
1489 | for (i = 0; i < inf->exception_info.count; i++) | |
1490 | { | |
1491 | kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]); | |
1492 | MACH_CHECK_ERROR (kret); | |
1493 | } | |
1494 | inf->exception_info.count = 0; | |
1495 | } | |
1496 | ||
1497 | static void | |
1498 | darwin_setup_exceptions (struct inferior *inf) | |
1499 | { | |
089354bb | 1500 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d | 1501 | kern_return_t kret; |
82b19a4d TG |
1502 | exception_mask_t mask; |
1503 | ||
089354bb | 1504 | kret = darwin_save_exception_ports (priv); |
82b19a4d TG |
1505 | if (kret != KERN_SUCCESS) |
1506 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1507 | "returned: %d"), | |
1508 | kret); | |
1509 | ||
1510 | /* Set exception port. */ | |
1511 | if (enable_mach_exceptions) | |
1512 | mask = EXC_MASK_ALL; | |
1513 | else | |
1514 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
089354bb | 1515 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
82b19a4d TG |
1516 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
1517 | if (kret != KERN_SUCCESS) | |
1518 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1519 | "returned: %d"), | |
1520 | kret); | |
1521 | } | |
1522 | ||
f6ac5f3d PA |
1523 | void |
1524 | darwin_nat_target::kill () | |
bb00b29d TG |
1525 | { |
1526 | struct inferior *inf = current_inferior (); | |
089354bb | 1527 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
1528 | struct target_waitstatus wstatus; |
1529 | ptid_t ptid; | |
1530 | kern_return_t kret; | |
bb00b29d TG |
1531 | int res; |
1532 | ||
d7e15655 | 1533 | if (inferior_ptid == null_ptid) |
bb00b29d TG |
1534 | return; |
1535 | ||
1536 | gdb_assert (inf != NULL); | |
1537 | ||
089354bb | 1538 | kret = darwin_restore_exception_ports (priv); |
ee41036f | 1539 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1540 | |
ee41036f | 1541 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1542 | |
f6ac5f3d | 1543 | res = ::kill (inf->pid, 9); |
bb00b29d | 1544 | |
ee41036f | 1545 | if (res == 0) |
bb00b29d | 1546 | { |
15843549 XR |
1547 | /* On MacOS version Sierra, the darwin_restore_exception_ports call |
1548 | does not work as expected. | |
1549 | When the kill function is called, the SIGKILL signal is received | |
1550 | by gdb whereas it should have been received by the kernel since | |
1551 | the exception ports have been restored. | |
1552 | This behavior is not the expected one thus gdb does not reply to | |
1553 | the received SIGKILL message. This situation leads to a "busy" | |
1554 | resource from the kernel point of view and the inferior is never | |
1555 | released, causing it to remain as a zombie process, even after | |
1556 | GDB exits. | |
1557 | To work around this, we mark all the threads of the inferior as | |
1558 | signaled thus darwin_decode_message function knows that the kill | |
1559 | signal was sent by gdb and will take the appropriate action | |
1560 | (cancel signal and reply to the signal message). */ | |
15843549 XR |
1561 | for (darwin_thread_t *thread : priv->threads) |
1562 | thread->signaled = 1; | |
1563 | ||
bb00b29d | 1564 | darwin_resume_inferior (inf); |
a6290449 | 1565 | |
bb00b29d TG |
1566 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1567 | } | |
ee41036f TG |
1568 | else if (errno != ESRCH) |
1569 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1570 | inf->pid, safe_strerror (errno)); | |
bb00b29d | 1571 | |
bc1e6c81 | 1572 | target_mourn_inferior (inferior_ptid); |
bb00b29d TG |
1573 | } |
1574 | ||
82b19a4d TG |
1575 | static void |
1576 | darwin_setup_request_notification (struct inferior *inf) | |
1577 | { | |
089354bb | 1578 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1579 | kern_return_t kret; |
1580 | mach_port_t prev_not; | |
1581 | ||
089354bb | 1582 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d | 1583 | MACH_NOTIFY_DEAD_NAME, 0, |
089354bb | 1584 | priv->notify_port, |
82b19a4d TG |
1585 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1586 | &prev_not); | |
1587 | if (kret != KERN_SUCCESS) | |
1588 | error (_("Termination notification request failed, " | |
1589 | "mach_port_request_notification\n" | |
1590 | "returned: %d"), | |
1591 | kret); | |
1592 | if (prev_not != MACH_PORT_NULL) | |
1593 | { | |
1594 | /* This is unexpected, as there should not be any previously | |
1595 | registered notification request. But this is not a fatal | |
1596 | issue, so just emit a warning. */ | |
1597 | warning (_("\ | |
1598 | A task termination request was registered before the debugger registered\n\ | |
1599 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1600 | impact on the debugging session.")); | |
1601 | } | |
1602 | } | |
1603 | ||
bb00b29d TG |
1604 | static void |
1605 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1606 | { |
a80b95ba | 1607 | kern_return_t kret; |
a80b95ba | 1608 | |
089354bb SM |
1609 | darwin_inferior *priv = new darwin_inferior; |
1610 | inf->priv.reset (priv); | |
bb00b29d | 1611 | |
a70b8144 | 1612 | try |
a80b95ba | 1613 | { |
a50c11c6 TT |
1614 | kret = task_for_pid (gdb_task, inf->pid, &priv->task); |
1615 | if (kret != KERN_SUCCESS) | |
a80b95ba | 1616 | { |
a50c11c6 | 1617 | int status; |
a80b95ba | 1618 | |
a50c11c6 TT |
1619 | if (!inf->attach_flag) |
1620 | { | |
1621 | kill (inf->pid, 9); | |
1622 | waitpid (inf->pid, &status, 0); | |
1623 | } | |
a80b95ba | 1624 | |
a50c11c6 TT |
1625 | error |
1626 | (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
1627 | " (please check gdb is codesigned - see taskgated(8))"), | |
1628 | inf->pid, mach_error_string (kret), (unsigned long) kret); | |
1629 | } | |
a80b95ba | 1630 | |
a50c11c6 TT |
1631 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
1632 | priv->task, inf->pid); | |
a80b95ba | 1633 | |
a50c11c6 TT |
1634 | if (darwin_ex_port == MACH_PORT_NULL) |
1635 | { | |
1636 | /* Create a port to get exceptions. */ | |
1637 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1638 | &darwin_ex_port); | |
1639 | if (kret != KERN_SUCCESS) | |
1640 | error (_("Unable to create exception port, mach_port_allocate " | |
1641 | "returned: %d"), | |
1642 | kret); | |
1643 | ||
1644 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, | |
1645 | darwin_ex_port, | |
1646 | MACH_MSG_TYPE_MAKE_SEND); | |
1647 | if (kret != KERN_SUCCESS) | |
1648 | error (_("Unable to create exception port, mach_port_insert_right " | |
1649 | "returned: %d"), | |
1650 | kret); | |
1651 | ||
1652 | /* Create a port set and put ex_port in it. */ | |
1653 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1654 | &darwin_port_set); | |
1655 | if (kret != KERN_SUCCESS) | |
1656 | error (_("Unable to create port set, mach_port_allocate " | |
1657 | "returned: %d"), | |
1658 | kret); | |
1659 | ||
1660 | kret = mach_port_move_member (gdb_task, darwin_ex_port, | |
1661 | darwin_port_set); | |
1662 | if (kret != KERN_SUCCESS) | |
1663 | error (_("Unable to move exception port into new port set, " | |
1664 | "mach_port_move_member\n" | |
1665 | "returned: %d"), | |
1666 | kret); | |
1667 | } | |
a80b95ba | 1668 | |
a50c11c6 TT |
1669 | /* Create a port to be notified when the child task terminates. */ |
1670 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1671 | &priv->notify_port); | |
fda184b6 | 1672 | if (kret != KERN_SUCCESS) |
a50c11c6 | 1673 | error (_("Unable to create notification port, mach_port_allocate " |
fda184b6 JB |
1674 | "returned: %d"), |
1675 | kret); | |
a80b95ba | 1676 | |
a50c11c6 TT |
1677 | kret = mach_port_move_member (gdb_task, |
1678 | priv->notify_port, darwin_port_set); | |
fda184b6 | 1679 | if (kret != KERN_SUCCESS) |
a50c11c6 | 1680 | error (_("Unable to move notification port into new port set, " |
fda184b6 JB |
1681 | "mach_port_move_member\n" |
1682 | "returned: %d"), | |
1683 | kret); | |
a80b95ba | 1684 | |
a50c11c6 | 1685 | darwin_setup_request_notification (inf); |
a80b95ba | 1686 | |
a50c11c6 TT |
1687 | darwin_setup_exceptions (inf); |
1688 | } | |
230d2906 | 1689 | catch (const gdb_exception &ex) |
a50c11c6 | 1690 | { |
a7d0f0f0 | 1691 | exit_inferior (inf); |
a50c11c6 | 1692 | inferior_ptid = null_ptid; |
a80b95ba | 1693 | |
eedc3f4f | 1694 | throw; |
a50c11c6 | 1695 | } |
a80b95ba | 1696 | |
59f413d5 | 1697 | target_ops *darwin_ops = get_native_target (); |
6a3cb8e8 PA |
1698 | if (!target_is_pushed (darwin_ops)) |
1699 | push_target (darwin_ops); | |
a80b95ba TG |
1700 | } |
1701 | ||
7aabaf9d | 1702 | /* Get the thread_info object corresponding to this darwin_thread_info. */ |
db665f42 SM |
1703 | |
1704 | static struct thread_info * | |
7aabaf9d | 1705 | thread_info_from_private_thread_info (darwin_thread_info *pti) |
db665f42 | 1706 | { |
61c9c421 | 1707 | for (struct thread_info *it : all_threads ()) |
db665f42 | 1708 | { |
7aabaf9d SM |
1709 | darwin_thread_info *iter_pti = get_darwin_thread_info (it); |
1710 | ||
1711 | if (iter_pti->gdb_port == pti->gdb_port) | |
08036331 | 1712 | return it; |
db665f42 SM |
1713 | } |
1714 | ||
08036331 | 1715 | gdb_assert_not_reached ("did not find gdb thread for darwin thread"); |
db665f42 SM |
1716 | } |
1717 | ||
a80b95ba | 1718 | static void |
bb00b29d | 1719 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1720 | { |
a80b95ba TG |
1721 | darwin_check_new_threads (inf); |
1722 | ||
089354bb | 1723 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 1724 | |
089354bb SM |
1725 | gdb_assert (!priv->threads.empty ()); |
1726 | ||
7aabaf9d | 1727 | darwin_thread_info *first_pti = priv->threads.front (); |
db665f42 SM |
1728 | struct thread_info *first_thread |
1729 | = thread_info_from_private_thread_info (first_pti); | |
1730 | ||
1731 | inferior_ptid = first_thread->ptid; | |
bb00b29d TG |
1732 | } |
1733 | ||
1734 | /* The child must synchronize with gdb: gdb must set the exception port | |
1735 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1736 | FIXME: is there a lighter way ? */ | |
1737 | static int ptrace_fds[2]; | |
1738 | ||
1739 | static void | |
1740 | darwin_ptrace_me (void) | |
1741 | { | |
1742 | int res; | |
1743 | char c; | |
1744 | ||
1745 | /* Close write end point. */ | |
0db8980c SDJ |
1746 | if (close (ptrace_fds[1]) < 0) |
1747 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1748 | |
1749 | /* Wait until gdb is ready. */ | |
1750 | res = read (ptrace_fds[0], &c, 1); | |
fda184b6 | 1751 | if (res != 0) |
0db8980c SDJ |
1752 | trace_start_error (_("unable to read from pipe, read returned: %d"), res); |
1753 | ||
1754 | if (close (ptrace_fds[0]) < 0) | |
1755 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1756 | |
1757 | /* Get rid of privileges. */ | |
0db8980c SDJ |
1758 | if (setegid (getgid ()) < 0) |
1759 | trace_start_error_with_name ("setegid"); | |
bb00b29d TG |
1760 | |
1761 | /* Set TRACEME. */ | |
0db8980c SDJ |
1762 | if (PTRACE (PT_TRACE_ME, 0, 0, 0) < 0) |
1763 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1764 | |
1765 | /* Redirect signals to exception port. */ | |
0db8980c SDJ |
1766 | if (PTRACE (PT_SIGEXC, 0, 0, 0) < 0) |
1767 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1768 | } |
1769 | ||
1770 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1771 | static void | |
1772 | darwin_pre_ptrace (void) | |
1773 | { | |
1774 | if (pipe (ptrace_fds) != 0) | |
1775 | { | |
1776 | ptrace_fds[0] = -1; | |
1777 | ptrace_fds[1] = -1; | |
1778 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1779 | } | |
21ff4686 TT |
1780 | |
1781 | mark_fd_no_cloexec (ptrace_fds[0]); | |
1782 | mark_fd_no_cloexec (ptrace_fds[1]); | |
a80b95ba TG |
1783 | } |
1784 | ||
1785 | static void | |
1786 | darwin_ptrace_him (int pid) | |
1787 | { | |
bb00b29d | 1788 | struct inferior *inf = current_inferior (); |
a80b95ba | 1789 | |
bb00b29d | 1790 | darwin_attach_pid (inf); |
a80b95ba TG |
1791 | |
1792 | /* Let's the child run. */ | |
1793 | close (ptrace_fds[0]); | |
1794 | close (ptrace_fds[1]); | |
1795 | ||
21ff4686 TT |
1796 | unmark_fd_no_cloexec (ptrace_fds[0]); |
1797 | unmark_fd_no_cloexec (ptrace_fds[1]); | |
1798 | ||
bb00b29d TG |
1799 | darwin_init_thread_list (inf); |
1800 | ||
2090129c | 1801 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
a80b95ba TG |
1802 | } |
1803 | ||
e69860f1 TG |
1804 | static void |
1805 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1806 | { | |
1807 | posix_spawnattr_t attr; | |
1808 | short ps_flags = 0; | |
f00c55f8 | 1809 | int res; |
e69860f1 | 1810 | |
f00c55f8 TG |
1811 | res = posix_spawnattr_init (&attr); |
1812 | if (res != 0) | |
e69860f1 TG |
1813 | { |
1814 | fprintf_unfiltered | |
1815 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); | |
1816 | return; | |
1817 | } | |
1818 | ||
1819 | /* Do like execve: replace the image. */ | |
1820 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1821 | ||
1822 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1823 | kernel include files. */ | |
1824 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1825 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1826 | #endif | |
1827 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1828 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1829 | if (res != 0) | |
e69860f1 | 1830 | { |
f00c55f8 | 1831 | fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1832 | return; |
1833 | } | |
1834 | ||
1835 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1836 | } | |
1837 | ||
b50a8b9a TT |
1838 | /* Read kernel version, and return TRUE if this host may have System |
1839 | Integrity Protection (Sierra or later). */ | |
d6be54ef XR |
1840 | |
1841 | static bool | |
b50a8b9a | 1842 | may_have_sip () |
d6be54ef XR |
1843 | { |
1844 | char str[16]; | |
1845 | size_t sz = sizeof (str); | |
1846 | int ret; | |
1847 | ||
1848 | ret = sysctlbyname ("kern.osrelease", str, &sz, NULL, 0); | |
1849 | if (ret == 0 && sz < sizeof (str)) | |
1850 | { | |
1851 | unsigned long ver = strtoul (str, NULL, 10); | |
1852 | if (ver >= 16) | |
1853 | return true; | |
1854 | } | |
1855 | return false; | |
1856 | } | |
1857 | ||
b50a8b9a TT |
1858 | /* A helper for maybe_cache_shell. This copies the shell to the |
1859 | cache. It will throw an exception on any failure. */ | |
1860 | ||
1861 | static void | |
1862 | copy_shell_to_cache (const char *shell, const std::string &new_name) | |
1863 | { | |
1864 | scoped_fd from_fd (gdb_open_cloexec (shell, O_RDONLY, 0)); | |
1865 | if (from_fd.get () < 0) | |
1866 | error (_("Could not open shell (%s) for reading: %s"), | |
1867 | shell, safe_strerror (errno)); | |
1868 | ||
1869 | std::string new_dir = ldirname (new_name.c_str ()); | |
1870 | if (!mkdir_recursive (new_dir.c_str ())) | |
1871 | error (_("Could not make cache directory \"%s\": %s"), | |
1872 | new_dir.c_str (), safe_strerror (errno)); | |
1873 | ||
1874 | gdb::char_vector temp_name = make_temp_filename (new_name); | |
1875 | scoped_fd to_fd (gdb_mkostemp_cloexec (&temp_name[0])); | |
1876 | gdb::unlinker unlink_file_on_error (temp_name.data ()); | |
1877 | ||
1878 | if (to_fd.get () < 0) | |
1879 | error (_("Could not open temporary file \"%s\" for writing: %s"), | |
1880 | temp_name.data (), safe_strerror (errno)); | |
1881 | ||
1882 | if (fcopyfile (from_fd.get (), to_fd.get (), nullptr, | |
1883 | COPYFILE_STAT | COPYFILE_DATA) != 0) | |
1884 | error (_("Could not copy shell to cache as \"%s\": %s"), | |
1885 | temp_name.data (), safe_strerror (errno)); | |
1886 | ||
1887 | /* Be sure that the caching is atomic so that we don't get bad | |
1888 | results from multiple copies of gdb running at the same time. */ | |
1889 | if (rename (temp_name.data (), new_name.c_str ()) != 0) | |
1890 | error (_("Could not rename shell cache file to \"%s\": %s"), | |
1891 | new_name.c_str (), safe_strerror (errno)); | |
1892 | ||
1893 | unlink_file_on_error.keep (); | |
1894 | } | |
1895 | ||
1896 | /* If $SHELL is restricted, try to cache a copy. Starting with El | |
1897 | Capitan, macOS introduced System Integrity Protection. Among other | |
1898 | things, this prevents certain executables from being ptrace'd. In | |
1899 | particular, executables in /bin, like most shells, are affected. | |
1900 | To work around this, while preserving command-line glob expansion | |
1901 | and redirections, gdb will cache a copy of the shell. Return true | |
1902 | if all is well -- either the shell is not subject to SIP or it has | |
1903 | been successfully cached. Returns false if something failed. */ | |
1904 | ||
1905 | static bool | |
1906 | maybe_cache_shell () | |
1907 | { | |
1908 | /* SF_RESTRICTED is defined in sys/stat.h and lets us determine if a | |
1909 | given file is subject to SIP. */ | |
1910 | #ifdef SF_RESTRICTED | |
1911 | ||
1912 | /* If a check fails we want to revert -- maybe the user deleted the | |
1913 | cache while gdb was running, or something like that. */ | |
1914 | copied_shell = nullptr; | |
1915 | ||
1916 | const char *shell = get_shell (); | |
1917 | if (!IS_ABSOLUTE_PATH (shell)) | |
1918 | { | |
1919 | warning (_("This version of macOS has System Integrity Protection.\n\ | |
1920 | Normally gdb would try to work around this by caching a copy of your shell,\n\ | |
1921 | but because your shell (%s) is not an absolute path, this is being skipped."), | |
1922 | shell); | |
1923 | return false; | |
1924 | } | |
1925 | ||
1926 | struct stat sb; | |
1927 | if (stat (shell, &sb) < 0) | |
1928 | { | |
1929 | warning (_("This version of macOS has System Integrity Protection.\n\ | |
1930 | Normally gdb would try to work around this by caching a copy of your shell,\n\ | |
1931 | but because gdb could not stat your shell (%s), this is being skipped.\n\ | |
1932 | The error was: %s"), | |
1933 | shell, safe_strerror (errno)); | |
1934 | return false; | |
1935 | } | |
1936 | ||
1937 | if ((sb.st_flags & SF_RESTRICTED) == 0) | |
1938 | return true; | |
1939 | ||
1940 | /* Put the copy somewhere like ~/Library/Caches/gdb/bin/sh. */ | |
1941 | std::string new_name = get_standard_cache_dir (); | |
1942 | /* There's no need to insert a directory separator here, because | |
1943 | SHELL is known to be absolute. */ | |
1944 | new_name.append (shell); | |
1945 | ||
1946 | /* Maybe it was cached by some earlier gdb. */ | |
1947 | if (stat (new_name.c_str (), &sb) != 0 || !S_ISREG (sb.st_mode)) | |
1948 | { | |
a70b8144 | 1949 | try |
b50a8b9a TT |
1950 | { |
1951 | copy_shell_to_cache (shell, new_name); | |
1952 | } | |
230d2906 | 1953 | catch (const gdb_exception_error &ex) |
b50a8b9a TT |
1954 | { |
1955 | warning (_("This version of macOS has System Integrity Protection.\n\ | |
1956 | Because `startup-with-shell' is enabled, gdb tried to work around SIP by\n\ | |
1957 | caching a copy of your shell. However, this failed:\n\ | |
1958 | %s\n\ | |
1959 | If you correct the problem, gdb will automatically try again the next time\n\ | |
1960 | you \"run\". To prevent these attempts, you can use:\n\ | |
1961 | set startup-with-shell off"), | |
3d6e9d23 | 1962 | ex.what ()); |
b50a8b9a TT |
1963 | return false; |
1964 | } | |
b50a8b9a TT |
1965 | |
1966 | printf_filtered (_("Note: this version of macOS has System Integrity Protection.\n\ | |
1967 | Because `startup-with-shell' is enabled, gdb has worked around this by\n\ | |
1968 | caching a copy of your shell. The shell used by \"run\" is now:\n\ | |
1969 | %s\n"), | |
1970 | new_name.c_str ()); | |
1971 | } | |
1972 | ||
1973 | /* We need to make sure that the new name has the correct lifetime. */ | |
1974 | static std::string saved_shell = std::move (new_name); | |
1975 | copied_shell = saved_shell.c_str (); | |
1976 | ||
1977 | #endif /* SF_RESTRICTED */ | |
1978 | ||
1979 | return true; | |
1980 | } | |
1981 | ||
f6ac5f3d PA |
1982 | void |
1983 | darwin_nat_target::create_inferior (const char *exec_file, | |
1984 | const std::string &allargs, | |
1985 | char **env, int from_tty) | |
a80b95ba | 1986 | { |
d6be54ef XR |
1987 | gdb::optional<scoped_restore_tmpl<int>> restore_startup_with_shell; |
1988 | ||
b50a8b9a | 1989 | if (startup_with_shell && may_have_sip ()) |
d6be54ef | 1990 | { |
b50a8b9a TT |
1991 | if (!maybe_cache_shell ()) |
1992 | { | |
1993 | warning (_("startup-with-shell is now temporarily disabled")); | |
1994 | restore_startup_with_shell.emplace (&startup_with_shell, 0); | |
1995 | } | |
d6be54ef XR |
1996 | } |
1997 | ||
a80b95ba | 1998 | /* Do the hard work. */ |
db665f42 | 1999 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, |
b50a8b9a | 2000 | darwin_ptrace_him, darwin_pre_ptrace, copied_shell, |
db665f42 | 2001 | darwin_execvp); |
a80b95ba TG |
2002 | } |
2003 | \f | |
2004 | ||
726ce67c JB |
2005 | /* Set things up such that the next call to darwin_wait will immediately |
2006 | return a fake stop event for inferior INF. | |
2007 | ||
2008 | This assumes that the inferior's thread list has been initialized, | |
2009 | as it will suspend the inferior's first thread. */ | |
2010 | ||
2011 | static void | |
2012 | darwin_setup_fake_stop_event (struct inferior *inf) | |
2013 | { | |
089354bb | 2014 | darwin_inferior *priv = get_darwin_inferior (inf); |
726ce67c JB |
2015 | darwin_thread_t *thread; |
2016 | kern_return_t kret; | |
2017 | ||
2018 | gdb_assert (darwin_inf_fake_stop == NULL); | |
2019 | darwin_inf_fake_stop = inf; | |
2020 | ||
2021 | /* When detecting a fake pending stop event, darwin_wait returns | |
2022 | an event saying that the first thread is in a DARWIN_STOPPED | |
2023 | state. To make that accurate, we need to suspend that thread | |
2024 | as well. Otherwise, we'll try resuming it when resuming the | |
2025 | inferior, and get a warning because the thread's suspend count | |
2026 | is already zero, making the resume request useless. */ | |
089354bb | 2027 | thread = priv->threads[0]; |
726ce67c JB |
2028 | kret = thread_suspend (thread->gdb_port); |
2029 | MACH_CHECK_ERROR (kret); | |
2030 | } | |
2031 | ||
a80b95ba TG |
2032 | /* Attach to process PID, then initialize for debugging it |
2033 | and wait for the trace-trap that results from attaching. */ | |
f6ac5f3d PA |
2034 | void |
2035 | darwin_nat_target::attach (const char *args, int from_tty) | |
a80b95ba TG |
2036 | { |
2037 | pid_t pid; | |
a80b95ba | 2038 | struct inferior *inf; |
a80b95ba | 2039 | |
74164c56 | 2040 | pid = parse_pid_to_attach (args); |
a80b95ba | 2041 | |
74164c56 | 2042 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
2043 | error (_("I refuse to debug myself!")); |
2044 | ||
2045 | if (from_tty) | |
bb00b29d TG |
2046 | { |
2047 | char *exec_file = get_exec_file (0); | |
a80b95ba | 2048 | |
bb00b29d TG |
2049 | if (exec_file) |
2050 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
a068643d | 2051 | target_pid_to_str (ptid_t (pid)).c_str ()); |
bb00b29d TG |
2052 | else |
2053 | printf_unfiltered (_("Attaching to %s\n"), | |
a068643d | 2054 | target_pid_to_str (ptid_t (pid)).c_str ()); |
bb00b29d TG |
2055 | } |
2056 | ||
f6ac5f3d | 2057 | if (pid == 0 || ::kill (pid, 0) < 0) |
bb00b29d TG |
2058 | error (_("Can't attach to process %d: %s (%d)"), |
2059 | pid, safe_strerror (errno), errno); | |
a80b95ba | 2060 | |
f2907e49 | 2061 | inferior_ptid = ptid_t (pid); |
6c95b8df PA |
2062 | inf = current_inferior (); |
2063 | inferior_appeared (inf, pid); | |
a80b95ba | 2064 | inf->attach_flag = 1; |
6c95b8df | 2065 | |
bb00b29d | 2066 | darwin_attach_pid (inf); |
a80b95ba | 2067 | |
bb00b29d | 2068 | darwin_suspend_inferior (inf); |
a80b95ba | 2069 | |
bb00b29d | 2070 | darwin_init_thread_list (inf); |
a80b95ba | 2071 | |
089354bb SM |
2072 | darwin_inferior *priv = get_darwin_inferior (inf); |
2073 | ||
cc6bcb54 | 2074 | darwin_check_osabi (priv, inferior_ptid.tid ()); |
a80b95ba | 2075 | |
726ce67c JB |
2076 | darwin_setup_fake_stop_event (inf); |
2077 | ||
089354bb | 2078 | priv->no_ptrace = 1; |
a80b95ba TG |
2079 | } |
2080 | ||
2081 | /* Take a program previously attached to and detaches it. | |
2082 | The program resumes execution and will no longer stop | |
2083 | on signals, etc. We'd better not have left any breakpoints | |
2084 | in the program or it'll die when it hits one. For this | |
2085 | to work, it may be necessary for the process to have been | |
2086 | previously attached. It *might* work if the program was | |
2087 | started via fork. */ | |
f6ac5f3d PA |
2088 | |
2089 | void | |
2090 | darwin_nat_target::detach (inferior *inf, int from_tty) | |
a80b95ba | 2091 | { |
089354bb | 2092 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
2093 | kern_return_t kret; |
2094 | int res; | |
2095 | ||
bb00b29d | 2096 | /* Display message. */ |
0f48b757 | 2097 | target_announce_detach (from_tty); |
a80b95ba | 2098 | |
bb00b29d | 2099 | /* If ptrace() is in use, stop the process. */ |
089354bb | 2100 | if (!priv->no_ptrace) |
bb00b29d | 2101 | darwin_stop_inferior (inf); |
a80b95ba | 2102 | |
089354bb | 2103 | kret = darwin_restore_exception_ports (priv); |
a80b95ba TG |
2104 | MACH_CHECK_ERROR (kret); |
2105 | ||
089354bb | 2106 | if (!priv->no_ptrace) |
a80b95ba | 2107 | { |
bb00b29d TG |
2108 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
2109 | if (res != 0) | |
2110 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
2111 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
2112 | } |
2113 | ||
bb00b29d | 2114 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 2115 | |
5e9bc145 JB |
2116 | /* When using ptrace, we have just performed a PT_DETACH, which |
2117 | resumes the inferior. On the other hand, when we are not using | |
2118 | ptrace, we need to resume its execution ourselves. */ | |
089354bb | 2119 | if (priv->no_ptrace) |
5e9bc145 | 2120 | darwin_resume_inferior (inf); |
a80b95ba | 2121 | |
f6ac5f3d | 2122 | mourn_inferior (); |
a80b95ba TG |
2123 | } |
2124 | ||
a068643d | 2125 | std::string |
f6ac5f3d | 2126 | darwin_nat_target::pid_to_str (ptid_t ptid) |
a80b95ba | 2127 | { |
cc6bcb54 | 2128 | long tid = ptid.tid (); |
bb00b29d TG |
2129 | |
2130 | if (tid != 0) | |
a068643d TT |
2131 | return string_printf (_("Thread 0x%lx of process %u"), |
2132 | tid, ptid.pid ()); | |
a80b95ba | 2133 | |
bb00b29d | 2134 | return normal_pid_to_str (ptid); |
a80b95ba TG |
2135 | } |
2136 | ||
57810aa7 | 2137 | bool |
f6ac5f3d | 2138 | darwin_nat_target::thread_alive (ptid_t ptid) |
a80b95ba | 2139 | { |
57810aa7 | 2140 | return true; |
a80b95ba TG |
2141 | } |
2142 | ||
2143 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
2144 | copy it to RDADDR in gdb's address space. | |
2145 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
2146 | to ADDR in inferior task's address space. | |
f00c55f8 | 2147 | Return 0 on failure; number of bytes read / writen otherwise. */ |
3eb831e0 | 2148 | |
a80b95ba TG |
2149 | static int |
2150 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 2151 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 2152 | ULONGEST length) |
a80b95ba | 2153 | { |
bb00b29d | 2154 | kern_return_t kret; |
3eb831e0 | 2155 | mach_vm_size_t res_length = 0; |
a80b95ba | 2156 | |
b55e14c7 YQ |
2157 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
2158 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 2159 | |
3eb831e0 TG |
2160 | /* First read. */ |
2161 | if (rdaddr != NULL) | |
a80b95ba | 2162 | { |
3eb831e0 | 2163 | mach_vm_size_t count; |
a80b95ba | 2164 | |
3eb831e0 TG |
2165 | /* According to target.h(to_xfer_partial), one and only one may be |
2166 | non-null. */ | |
2167 | gdb_assert (wraddr == NULL); | |
a80b95ba | 2168 | |
3eb831e0 TG |
2169 | kret = mach_vm_read_overwrite (task, addr, length, |
2170 | (mach_vm_address_t) rdaddr, &count); | |
2171 | if (kret != KERN_SUCCESS) | |
2172 | { | |
2173 | inferior_debug | |
2174 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
2175 | core_addr_to_string (addr), mach_error_string (kret)); | |
2176 | return 0; | |
2177 | } | |
2178 | return count; | |
2179 | } | |
a80b95ba | 2180 | |
3eb831e0 TG |
2181 | /* See above. */ |
2182 | gdb_assert (wraddr != NULL); | |
a80b95ba | 2183 | |
3eb831e0 | 2184 | while (length != 0) |
a80b95ba | 2185 | { |
3eb831e0 TG |
2186 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
2187 | mach_vm_address_t region_address = (mach_vm_address_t) (addr - offset); | |
2188 | mach_vm_size_t aligned_length = | |
2189 | (mach_vm_size_t) PAGE_ROUND (offset + length); | |
bb00b29d | 2190 | vm_region_submap_short_info_data_64_t info; |
3eb831e0 TG |
2191 | mach_msg_type_number_t count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; |
2192 | natural_t region_depth = 1000; | |
bb00b29d | 2193 | mach_vm_address_t region_start = region_address; |
3eb831e0 TG |
2194 | mach_vm_size_t region_length; |
2195 | mach_vm_size_t write_length; | |
bb00b29d | 2196 | |
3eb831e0 | 2197 | /* Read page protection. */ |
bb00b29d TG |
2198 | kret = mach_vm_region_recurse |
2199 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
2200 | (vm_region_recurse_info_t) &info, &count); | |
2201 | ||
2202 | if (kret != KERN_SUCCESS) | |
a80b95ba | 2203 | { |
bb00b29d TG |
2204 | inferior_debug (1, _("darwin_read_write_inferior: " |
2205 | "mach_vm_region_recurse failed at %s: %s\n"), | |
2206 | core_addr_to_string (region_address), | |
2207 | mach_error_string (kret)); | |
3eb831e0 | 2208 | return res_length; |
a80b95ba TG |
2209 | } |
2210 | ||
bb00b29d TG |
2211 | inferior_debug |
2212 | (9, _("darwin_read_write_inferior: " | |
2213 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
2214 | core_addr_to_string (region_address), | |
2215 | core_addr_to_string (region_start), | |
2216 | core_addr_to_string (region_length)); | |
2217 | ||
0963b4bd | 2218 | /* Check for holes in memory. */ |
bb00b29d | 2219 | if (region_start > region_address) |
a80b95ba | 2220 | { |
0963b4bd | 2221 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 2222 | core_addr_to_string (region_address), |
bb00b29d | 2223 | core_addr_to_string (region_start), |
a80b95ba | 2224 | (unsigned)region_length); |
3eb831e0 | 2225 | return res_length; |
a80b95ba TG |
2226 | } |
2227 | ||
bb00b29d TG |
2228 | /* Adjust the length. */ |
2229 | region_length -= (region_address - region_start); | |
3eb831e0 TG |
2230 | if (region_length > aligned_length) |
2231 | region_length = aligned_length; | |
bb00b29d | 2232 | |
3eb831e0 TG |
2233 | /* Make the pages RW. */ |
2234 | if (!(info.protection & VM_PROT_WRITE)) | |
a80b95ba | 2235 | { |
3eb831e0 TG |
2236 | vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE; |
2237 | ||
2238 | kret = mach_vm_protect (task, region_address, region_length, | |
2239 | FALSE, prot); | |
bb00b29d TG |
2240 | if (kret != KERN_SUCCESS) |
2241 | { | |
3eb831e0 TG |
2242 | prot |= VM_PROT_COPY; |
2243 | kret = mach_vm_protect (task, region_address, region_length, | |
2244 | FALSE, prot); | |
2245 | } | |
2246 | if (kret != KERN_SUCCESS) | |
2247 | { | |
2248 | warning (_("darwin_read_write_inferior: " | |
2249 | "mach_vm_protect failed at %s " | |
2250 | "(len=0x%lx, prot=0x%x): %s"), | |
bb00b29d | 2251 | core_addr_to_string (region_address), |
3eb831e0 | 2252 | (unsigned long) region_length, (unsigned) prot, |
bb00b29d | 2253 | mach_error_string (kret)); |
3eb831e0 | 2254 | return res_length; |
bb00b29d | 2255 | } |
a80b95ba TG |
2256 | } |
2257 | ||
3eb831e0 TG |
2258 | if (offset + length > region_length) |
2259 | write_length = region_length - offset; | |
2260 | else | |
2261 | write_length = length; | |
2262 | ||
2263 | /* Write. */ | |
2264 | kret = mach_vm_write (task, addr, (vm_offset_t) wraddr, write_length); | |
2265 | if (kret != KERN_SUCCESS) | |
2266 | { | |
2267 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
2268 | mach_error_string (kret)); | |
2269 | return res_length; | |
2270 | } | |
2271 | ||
2272 | /* Restore page rights. */ | |
a80b95ba TG |
2273 | if (!(info.protection & VM_PROT_WRITE)) |
2274 | { | |
bb00b29d | 2275 | kret = mach_vm_protect (task, region_address, region_length, |
3eb831e0 | 2276 | FALSE, info.protection); |
bb00b29d | 2277 | if (kret != KERN_SUCCESS) |
a80b95ba | 2278 | { |
3eb831e0 TG |
2279 | warning (_("darwin_read_write_inferior: " |
2280 | "mach_vm_protect restore failed at %s " | |
2281 | "(len=0x%lx): %s"), | |
bb00b29d | 2282 | core_addr_to_string (region_address), |
3eb831e0 TG |
2283 | (unsigned long) region_length, |
2284 | mach_error_string (kret)); | |
a80b95ba TG |
2285 | } |
2286 | } | |
a80b95ba | 2287 | |
3eb831e0 TG |
2288 | addr += write_length; |
2289 | wraddr += write_length; | |
2290 | res_length += write_length; | |
2291 | length -= write_length; | |
a80b95ba | 2292 | } |
3eb831e0 TG |
2293 | |
2294 | return res_length; | |
a80b95ba TG |
2295 | } |
2296 | ||
f00c55f8 | 2297 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
ad2073b0 | 2298 | to RDADDR (in big endian). |
569283d4 | 2299 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 2300 | |
b967eb24 | 2301 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 2302 | /* This is not available in Darwin 9. */ |
9b409511 | 2303 | static enum target_xfer_status |
b9dd1947 | 2304 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 2305 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
2306 | { |
2307 | struct task_dyld_info task_dyld_info; | |
2308 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
f00c55f8 TG |
2309 | kern_return_t kret; |
2310 | ||
ad2073b0 | 2311 | if (addr != 0 || length > sizeof (mach_vm_address_t)) |
9b409511 | 2312 | return TARGET_XFER_EOF; |
f00c55f8 | 2313 | |
ad2073b0 TG |
2314 | kret = task_info (task, TASK_DYLD_INFO, |
2315 | (task_info_t) &task_dyld_info, &count); | |
f00c55f8 TG |
2316 | MACH_CHECK_ERROR (kret); |
2317 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 2318 | return TARGET_XFER_E_IO; |
ad2073b0 TG |
2319 | |
2320 | store_unsigned_integer (rdaddr, length, BFD_ENDIAN_BIG, | |
2321 | task_dyld_info.all_image_info_addr); | |
9b409511 YQ |
2322 | *xfered_len = (ULONGEST) length; |
2323 | return TARGET_XFER_OK; | |
f00c55f8 | 2324 | } |
569283d4 | 2325 | #endif |
f00c55f8 | 2326 | |
a80b95ba | 2327 | \f |
a80b95ba | 2328 | |
f6ac5f3d PA |
2329 | enum target_xfer_status |
2330 | darwin_nat_target::xfer_partial (enum target_object object, const char *annex, | |
2331 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
2332 | ULONGEST offset, ULONGEST len, | |
2333 | ULONGEST *xfered_len) | |
a80b95ba | 2334 | { |
bb00b29d | 2335 | struct inferior *inf = current_inferior (); |
089354bb | 2336 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2337 | |
2338 | inferior_debug | |
b55e14c7 YQ |
2339 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
2340 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
2341 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
2342 | inf->pid); | |
a80b95ba | 2343 | |
f00c55f8 TG |
2344 | switch (object) |
2345 | { | |
2346 | case TARGET_OBJECT_MEMORY: | |
9b409511 | 2347 | { |
089354bb | 2348 | int l = darwin_read_write_inferior (priv->task, offset, |
9b409511 YQ |
2349 | readbuf, writebuf, len); |
2350 | ||
2351 | if (l == 0) | |
2352 | return TARGET_XFER_EOF; | |
2353 | else | |
2354 | { | |
2355 | gdb_assert (l > 0); | |
2356 | *xfered_len = (ULONGEST) l; | |
2357 | return TARGET_XFER_OK; | |
2358 | } | |
2359 | } | |
569283d4 | 2360 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
2361 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
2362 | if (writebuf != NULL || readbuf == NULL) | |
2363 | { | |
2364 | /* Support only read. */ | |
2ed4b548 | 2365 | return TARGET_XFER_E_IO; |
f00c55f8 | 2366 | } |
089354bb | 2367 | return darwin_read_dyld_info (priv->task, offset, readbuf, len, |
9b409511 | 2368 | xfered_len); |
569283d4 | 2369 | #endif |
f00c55f8 | 2370 | default: |
2ed4b548 | 2371 | return TARGET_XFER_E_IO; |
f00c55f8 | 2372 | } |
a80b95ba | 2373 | |
a80b95ba TG |
2374 | } |
2375 | ||
2376 | static void | |
0fc76421 | 2377 | set_enable_mach_exceptions (const char *args, int from_tty, |
a80b95ba TG |
2378 | struct cmd_list_element *c) |
2379 | { | |
d7e15655 | 2380 | if (inferior_ptid != null_ptid) |
a80b95ba | 2381 | { |
bb00b29d | 2382 | struct inferior *inf = current_inferior (); |
089354bb | 2383 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
2384 | exception_mask_t mask; |
2385 | kern_return_t kret; | |
2386 | ||
2387 | if (enable_mach_exceptions) | |
2388 | mask = EXC_MASK_ALL; | |
2389 | else | |
2390 | { | |
089354bb | 2391 | darwin_restore_exception_ports (priv); |
bb00b29d | 2392 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
a80b95ba | 2393 | } |
089354bb | 2394 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
a80b95ba TG |
2395 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2396 | MACH_CHECK_ERROR (kret); | |
2397 | } | |
2398 | } | |
2399 | ||
f6ac5f3d PA |
2400 | char * |
2401 | darwin_nat_target::pid_to_exec_file (int pid) | |
bb00b29d | 2402 | { |
b4ab256d | 2403 | static char path[PATH_MAX]; |
bb00b29d TG |
2404 | int res; |
2405 | ||
d8d2a3ee | 2406 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2407 | if (res >= 0) |
2408 | return path; | |
2409 | else | |
2410 | return NULL; | |
2411 | } | |
2412 | ||
f6ac5f3d PA |
2413 | ptid_t |
2414 | darwin_nat_target::get_ada_task_ptid (long lwp, long thread) | |
bb00b29d | 2415 | { |
bb00b29d | 2416 | struct inferior *inf = current_inferior (); |
089354bb | 2417 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2418 | kern_return_t kret; |
2419 | mach_port_name_array_t names; | |
2420 | mach_msg_type_number_t names_count; | |
2421 | mach_port_type_array_t types; | |
2422 | mach_msg_type_number_t types_count; | |
2423 | long res = 0; | |
2424 | ||
2425 | /* First linear search. */ | |
089354bb SM |
2426 | for (darwin_thread_t *t : priv->threads) |
2427 | { | |
2428 | if (t->inf_port == lwp) | |
e99b03dc | 2429 | return ptid_t (inferior_ptid.pid (), 0, t->gdb_port); |
089354bb | 2430 | } |
bb00b29d TG |
2431 | |
2432 | /* Maybe the port was never extract. Do it now. */ | |
2433 | ||
2434 | /* First get inferior port names. */ | |
089354bb | 2435 | kret = mach_port_names (priv->task, &names, &names_count, &types, |
bb00b29d TG |
2436 | &types_count); |
2437 | MACH_CHECK_ERROR (kret); | |
2438 | if (kret != KERN_SUCCESS) | |
2439 | return null_ptid; | |
2440 | ||
2441 | /* For each name, copy the right in the gdb space and then compare with | |
2442 | our view of the inferior threads. We don't forget to deallocate the | |
2443 | right. */ | |
089354bb | 2444 | for (int i = 0; i < names_count; i++) |
bb00b29d TG |
2445 | { |
2446 | mach_port_t local_name; | |
2447 | mach_msg_type_name_t local_type; | |
2448 | ||
2449 | /* We just need to know the corresponding name in gdb name space. | |
2450 | So extract and deallocate the right. */ | |
089354bb | 2451 | kret = mach_port_extract_right (priv->task, names[i], |
bb00b29d TG |
2452 | MACH_MSG_TYPE_COPY_SEND, |
2453 | &local_name, &local_type); | |
2454 | if (kret != KERN_SUCCESS) | |
2455 | continue; | |
2456 | mach_port_deallocate (gdb_task, local_name); | |
2457 | ||
089354bb SM |
2458 | for (darwin_thread_t *t : priv->threads) |
2459 | { | |
2460 | if (t->gdb_port == local_name) | |
2461 | { | |
2462 | t->inf_port = names[i]; | |
2463 | if (names[i] == lwp) | |
2464 | res = t->gdb_port; | |
2465 | } | |
2466 | } | |
bb00b29d TG |
2467 | } |
2468 | ||
2469 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2470 | names_count * sizeof (mach_port_t)); | |
2471 | ||
2472 | if (res) | |
e99b03dc | 2473 | return ptid_t (inferior_ptid.pid (), 0, res); |
bb00b29d TG |
2474 | else |
2475 | return null_ptid; | |
2476 | } | |
2477 | ||
57810aa7 | 2478 | bool |
f6ac5f3d | 2479 | darwin_nat_target::supports_multi_process () |
bb00b29d | 2480 | { |
57810aa7 | 2481 | return true; |
bb00b29d TG |
2482 | } |
2483 | ||
a80b95ba | 2484 | void |
f6ac5f3d | 2485 | _initialize_darwin_nat () |
a80b95ba TG |
2486 | { |
2487 | kern_return_t kret; | |
2488 | ||
a80b95ba TG |
2489 | gdb_task = mach_task_self (); |
2490 | darwin_host_self = mach_host_self (); | |
2491 | ||
2492 | /* Read page size. */ | |
2493 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2494 | if (kret != KERN_SUCCESS) | |
2495 | { | |
2496 | mach_page_size = 0x1000; | |
2497 | MACH_CHECK_ERROR (kret); | |
2498 | } | |
2499 | ||
3eb831e0 TG |
2500 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), |
2501 | (unsigned long) mach_task_self (), getpid ()); | |
a80b95ba | 2502 | |
ccce17b0 YQ |
2503 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2504 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2505 | Set if printing inferior communication debugging statements."), _("\ |
2506 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2507 | NULL, NULL, |
2508 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2509 | |
2510 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2511 | &enable_mach_exceptions, _("\ | |
2512 | Set if mach exceptions are caught."), _("\ | |
2513 | Show if mach exceptions are caught."), _("\ | |
2514 | When this mode is on, all low level exceptions are reported before being\n\ | |
2515 | reported by the kernel."), | |
2516 | &set_enable_mach_exceptions, NULL, | |
2517 | &setlist, &showlist); | |
2518 | } |