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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
e2882c85 | 2 | Copyright (C) 2008-2018 Free Software Foundation, Inc. |
a80b95ba TG |
3 | |
4 | Contributed by AdaCore. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
47d48711 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
a80b95ba TG |
20 | |
21 | #include "defs.h" | |
22 | #include "top.h" | |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "symfile.h" | |
26 | #include "symtab.h" | |
27 | #include "objfiles.h" | |
a80b95ba TG |
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" | |
53ce3c39 | 34 | #include <sys/stat.h> |
a80b95ba TG |
35 | #include "inf-child.h" |
36 | #include "value.h" | |
37 | #include "arch-utils.h" | |
38 | #include "bfd.h" | |
ece0061f | 39 | #include "bfd/mach-o.h" |
a80b95ba TG |
40 | |
41 | #include <sys/ptrace.h> | |
42 | #include <sys/signal.h> | |
4ac15b59 | 43 | #include <setjmp.h> |
a80b95ba TG |
44 | #include <sys/types.h> |
45 | #include <unistd.h> | |
46 | #include <signal.h> | |
a80b95ba | 47 | #include <ctype.h> |
a80b95ba TG |
48 | #include <sys/sysctl.h> |
49 | #include <sys/proc.h> | |
bb00b29d TG |
50 | #include <libproc.h> |
51 | #include <sys/syscall.h> | |
e69860f1 | 52 | #include <spawn.h> |
a80b95ba TG |
53 | |
54 | #include <mach/mach_error.h> | |
55 | #include <mach/mach_vm.h> | |
56 | #include <mach/mach_init.h> | |
57 | #include <mach/vm_map.h> | |
58 | #include <mach/task.h> | |
59 | #include <mach/mach_port.h> | |
60 | #include <mach/thread_act.h> | |
61 | #include <mach/port.h> | |
62 | ||
63 | #include "darwin-nat.h" | |
21ff4686 | 64 | #include "common/filestuff.h" |
01ec7a27 | 65 | #include "nat/fork-inferior.h" |
a80b95ba TG |
66 | |
67 | /* Quick overview. | |
68 | Darwin kernel is Mach + BSD derived kernel. Note that they share the | |
69 | same memory space and are linked together (ie there is no micro-kernel). | |
70 | ||
71 | Although ptrace(2) is available on Darwin, it is not complete. We have | |
72 | to use Mach calls to read and write memory and to modify registers. We | |
73 | also use Mach to get inferior faults. As we cannot use select(2) or | |
74 | signals with Mach port (the Mach communication channel), signals are | |
75 | reported to gdb as an exception. Furthermore we detect death of the | |
76 | inferior through a Mach notification message. This way we only wait | |
77 | on Mach ports. | |
78 | ||
79 | Some Mach documentation is available for Apple xnu source package or | |
80 | from the web. */ | |
81 | ||
82 | ||
83 | #define PTRACE(CMD, PID, ADDR, SIG) \ | |
84 | darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG)) | |
85 | ||
bb00b29d TG |
86 | static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status); |
87 | ||
a80b95ba TG |
88 | static void darwin_ptrace_me (void); |
89 | ||
90 | static void darwin_ptrace_him (int pid); | |
91 | ||
a41f2563 TG |
92 | static void darwin_encode_reply (mig_reply_error_t *reply, |
93 | mach_msg_header_t *hdr, integer_t code); | |
94 | ||
82b19a4d TG |
95 | static void darwin_setup_request_notification (struct inferior *inf); |
96 | static void darwin_deallocate_exception_ports (darwin_inferior *inf); | |
97 | static void darwin_setup_exceptions (struct inferior *inf); | |
98 | static void darwin_deallocate_threads (struct inferior *inf); | |
99 | ||
a80b95ba TG |
100 | /* Task identifier of gdb. */ |
101 | static task_t gdb_task; | |
102 | ||
103 | /* A copy of mach_host_self (). */ | |
104 | mach_port_t darwin_host_self; | |
105 | ||
106 | /* Exception port. */ | |
107 | mach_port_t darwin_ex_port; | |
108 | ||
a6290449 | 109 | /* Port set, to wait for answer on all ports. */ |
a80b95ba TG |
110 | mach_port_t darwin_port_set; |
111 | ||
0963b4bd | 112 | /* Page size. */ |
a80b95ba TG |
113 | static vm_size_t mach_page_size; |
114 | ||
115 | /* If Set, catch all mach exceptions (before they are converted to signals | |
116 | by the kernel). */ | |
117 | static int enable_mach_exceptions; | |
118 | ||
bb00b29d TG |
119 | /* Inferior that should report a fake stop event. */ |
120 | static struct inferior *darwin_inf_fake_stop; | |
121 | ||
a80b95ba TG |
122 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
123 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
124 | ||
bb00b29d | 125 | /* This controls output of inferior debugging. */ |
ccce17b0 | 126 | static unsigned int darwin_debug_flag = 0; |
a80b95ba | 127 | |
15c19d39 TG |
128 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
129 | be signed. This is required to get an authorization for task_for_pid. | |
130 | ||
a6290449 TG |
131 | Once gdb is built, you must codesign it with any system-trusted signing |
132 | authority. See taskgated(8) for details. */ | |
15c19d39 TG |
133 | static const unsigned char info_plist[] |
134 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
135 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
136 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
137 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
138 | "<plist version=\"1.0\">\n" | |
139 | "<dict>\n" | |
140 | " <key>CFBundleIdentifier</key>\n" | |
141 | " <string>org.gnu.gdb</string>\n" | |
142 | " <key>CFBundleName</key>\n" | |
143 | " <string>gdb</string>\n" | |
144 | " <key>CFBundleVersion</key>\n" | |
145 | " <string>1.0</string>\n" | |
146 | " <key>SecTaskAccess</key>\n" | |
147 | " <array>\n" | |
148 | " <string>allowed</string>\n" | |
149 | " <string>debug</string>\n" | |
150 | " </array>\n" | |
151 | "</dict>\n" | |
152 | "</plist>\n"; | |
153 | ||
77b64a49 PA |
154 | static void inferior_debug (int level, const char *fmt, ...) |
155 | ATTRIBUTE_PRINTF (2, 3); | |
156 | ||
a80b95ba TG |
157 | static void |
158 | inferior_debug (int level, const char *fmt, ...) | |
159 | { | |
160 | va_list ap; | |
161 | ||
162 | if (darwin_debug_flag < level) | |
163 | return; | |
164 | ||
165 | va_start (ap, fmt); | |
166 | printf_unfiltered (_("[%d inferior]: "), getpid ()); | |
167 | vprintf_unfiltered (fmt, ap); | |
168 | va_end (ap); | |
169 | } | |
170 | ||
171 | void | |
172 | mach_check_error (kern_return_t ret, const char *file, | |
173 | unsigned int line, const char *func) | |
174 | { | |
175 | if (ret == KERN_SUCCESS) | |
176 | return; | |
177 | if (func == NULL) | |
178 | func = _("[UNKNOWN]"); | |
bb00b29d | 179 | |
4f1cdeec | 180 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 181 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
182 | } |
183 | ||
184 | static const char * | |
185 | unparse_exception_type (unsigned int i) | |
186 | { | |
187 | static char unknown_exception_buf[32]; | |
188 | ||
189 | switch (i) | |
190 | { | |
191 | case EXC_BAD_ACCESS: | |
192 | return "EXC_BAD_ACCESS"; | |
193 | case EXC_BAD_INSTRUCTION: | |
194 | return "EXC_BAD_INSTRUCTION"; | |
195 | case EXC_ARITHMETIC: | |
196 | return "EXC_ARITHMETIC"; | |
197 | case EXC_EMULATION: | |
198 | return "EXC_EMULATION"; | |
199 | case EXC_SOFTWARE: | |
200 | return "EXC_SOFTWARE"; | |
201 | case EXC_BREAKPOINT: | |
202 | return "EXC_BREAKPOINT"; | |
203 | case EXC_SYSCALL: | |
204 | return "EXC_SYSCALL"; | |
205 | case EXC_MACH_SYSCALL: | |
206 | return "EXC_MACH_SYSCALL"; | |
207 | case EXC_RPC_ALERT: | |
208 | return "EXC_RPC_ALERT"; | |
209 | case EXC_CRASH: | |
210 | return "EXC_CRASH"; | |
211 | default: | |
212 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
213 | return unknown_exception_buf; | |
214 | } | |
215 | } | |
216 | ||
a7aa0d73 JB |
217 | /* Set errno to zero, and then call ptrace with the given arguments. |
218 | If inferior debugging traces are on, then also print a debug | |
219 | trace. | |
220 | ||
221 | The returned value is the same as the value returned by ptrace, | |
222 | except in the case where that value is -1 but errno is zero. | |
223 | This case is documented to be a non-error situation, so we | |
224 | return zero in that case. */ | |
225 | ||
a80b95ba TG |
226 | static int |
227 | darwin_ptrace (const char *name, | |
aa14fb50 | 228 | int request, int pid, caddr_t arg3, int arg4) |
a80b95ba TG |
229 | { |
230 | int ret; | |
231 | ||
a7aa0d73 | 232 | errno = 0; |
aa14fb50 | 233 | ret = ptrace (request, pid, arg3, arg4); |
a7aa0d73 JB |
234 | if (ret == -1 && errno == 0) |
235 | ret = 0; | |
a80b95ba | 236 | |
3eb831e0 TG |
237 | inferior_debug (4, _("ptrace (%s, %d, 0x%lx, %d): %d (%s)\n"), |
238 | name, pid, (unsigned long) arg3, arg4, ret, | |
a3224241 | 239 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
240 | return ret; |
241 | } | |
242 | ||
243 | static int | |
244 | cmp_thread_t (const void *l, const void *r) | |
245 | { | |
bb00b29d TG |
246 | thread_t tl = *(const thread_t *)l; |
247 | thread_t tr = *(const thread_t *)r; | |
248 | return (int)(tl - tr); | |
a80b95ba TG |
249 | } |
250 | ||
251 | static void | |
bb00b29d | 252 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
253 | { |
254 | kern_return_t kret; | |
a80b95ba TG |
255 | thread_array_t thread_list; |
256 | unsigned int new_nbr; | |
257 | unsigned int old_nbr; | |
258 | unsigned int new_ix, old_ix; | |
089354bb SM |
259 | darwin_inferior *darwin_inf = get_darwin_inferior (inf); |
260 | std::vector<darwin_thread_t *> new_thread_vec; | |
a80b95ba | 261 | |
b5bddbbb TT |
262 | if (darwin_inf == nullptr) |
263 | return; | |
264 | ||
a80b95ba | 265 | /* Get list of threads. */ |
bb00b29d | 266 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
267 | MACH_CHECK_ERROR (kret); |
268 | if (kret != KERN_SUCCESS) | |
269 | return; | |
270 | ||
bb00b29d | 271 | /* Sort the list. */ |
a80b95ba TG |
272 | if (new_nbr > 1) |
273 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
274 | ||
089354bb | 275 | old_nbr = darwin_inf->threads.size (); |
a80b95ba | 276 | |
bb00b29d TG |
277 | /* Quick check for no changes. */ |
278 | if (old_nbr == new_nbr) | |
279 | { | |
089354bb SM |
280 | size_t i; |
281 | ||
bb00b29d | 282 | for (i = 0; i < new_nbr; i++) |
089354bb | 283 | if (thread_list[i] != darwin_inf->threads[i]->gdb_port) |
bb00b29d TG |
284 | break; |
285 | if (i == new_nbr) | |
286 | { | |
15a9128a TG |
287 | /* Deallocate ports. */ |
288 | for (i = 0; i < new_nbr; i++) | |
289 | { | |
290 | kret = mach_port_deallocate (mach_task_self (), thread_list[i]); | |
291 | MACH_CHECK_ERROR (kret); | |
292 | } | |
293 | ||
294 | /* Deallocate the buffer. */ | |
bb00b29d TG |
295 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
296 | new_nbr * sizeof (int)); | |
297 | MACH_CHECK_ERROR (kret); | |
15a9128a | 298 | |
bb00b29d TG |
299 | return; |
300 | } | |
301 | } | |
302 | ||
82b19a4d | 303 | /* Full handling: detect new threads, remove dead threads. */ |
089354bb SM |
304 | |
305 | new_thread_vec.reserve (new_nbr); | |
bb00b29d | 306 | |
a80b95ba TG |
307 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
308 | { | |
089354bb SM |
309 | thread_t new_id = (new_ix < new_nbr) ? thread_list[new_ix] : THREAD_NULL; |
310 | darwin_thread_t *old | |
311 | = (old_ix < old_nbr) ? darwin_inf->threads[old_ix] : NULL; | |
312 | thread_t old_id = old != NULL ? old->gdb_port : THREAD_NULL; | |
bb00b29d TG |
313 | |
314 | inferior_debug | |
c8c9911f | 315 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"), |
bb00b29d | 316 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
a80b95ba TG |
317 | |
318 | if (old_id == new_id) | |
319 | { | |
320 | /* Thread still exist. */ | |
089354bb | 321 | new_thread_vec.push_back (old); |
a80b95ba TG |
322 | new_ix++; |
323 | old_ix++; | |
324 | ||
15a9128a TG |
325 | /* Deallocate the port. */ |
326 | kret = mach_port_deallocate (gdb_task, new_id); | |
a80b95ba | 327 | MACH_CHECK_ERROR (kret); |
15a9128a | 328 | |
a80b95ba TG |
329 | continue; |
330 | } | |
bb00b29d TG |
331 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
332 | { | |
333 | /* Ignore dead ports. | |
334 | In some weird cases, we might get dead ports. They should | |
335 | correspond to dead thread so they could safely be ignored. */ | |
336 | new_ix++; | |
337 | continue; | |
338 | } | |
339 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
340 | { |
341 | /* A thread was created. */ | |
7aabaf9d | 342 | darwin_thread_info *pti = new darwin_thread_info; |
a80b95ba | 343 | |
bb00b29d TG |
344 | pti->gdb_port = new_id; |
345 | pti->msg_state = DARWIN_RUNNING; | |
346 | ||
db665f42 | 347 | /* Add the new thread. */ |
fd79271b | 348 | add_thread_with_info (ptid_t (inf->pid, 0, new_id), pti); |
089354bb | 349 | new_thread_vec.push_back (pti); |
a80b95ba TG |
350 | new_ix++; |
351 | continue; | |
352 | } | |
bb00b29d | 353 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
354 | { |
355 | /* A thread was removed. */ | |
b7a08269 | 356 | struct thread_info *thr |
fd79271b | 357 | = find_thread_ptid (ptid_t (inf->pid, 0, old_id)); |
b7a08269 | 358 | delete_thread (thr); |
a80b95ba TG |
359 | kret = mach_port_deallocate (gdb_task, old_id); |
360 | MACH_CHECK_ERROR (kret); | |
361 | old_ix++; | |
bb00b29d | 362 | continue; |
a80b95ba | 363 | } |
f3574227 | 364 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
365 | } |
366 | ||
089354bb | 367 | darwin_inf->threads = std::move (new_thread_vec); |
a80b95ba | 368 | |
15a9128a | 369 | /* Deallocate the buffer. */ |
a80b95ba TG |
370 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
371 | new_nbr * sizeof (int)); | |
372 | MACH_CHECK_ERROR (kret); | |
373 | } | |
374 | ||
bb00b29d TG |
375 | static int |
376 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 377 | { |
089354bb SM |
378 | darwin_inferior *priv = get_darwin_inferior (inf); |
379 | ||
b5bddbbb | 380 | return priv != nullptr && priv->task == *(task_t *)port_ptr; |
bb00b29d | 381 | } |
a80b95ba | 382 | |
bb00b29d | 383 | static int |
82b19a4d | 384 | find_inferior_pid_it (struct inferior *inf, void *pid_ptr) |
bb00b29d | 385 | { |
82b19a4d | 386 | return inf->pid == *(int *)pid_ptr; |
a80b95ba TG |
387 | } |
388 | ||
bb00b29d TG |
389 | /* Return an inferior by task port. */ |
390 | static struct inferior * | |
391 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 392 | { |
bb00b29d TG |
393 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
394 | } | |
a80b95ba | 395 | |
82b19a4d | 396 | /* Return an inferior by pid port. */ |
bb00b29d | 397 | static struct inferior * |
82b19a4d | 398 | darwin_find_inferior_by_pid (int pid) |
bb00b29d | 399 | { |
82b19a4d | 400 | return iterate_over_inferiors (&find_inferior_pid_it, &pid); |
bb00b29d | 401 | } |
a80b95ba | 402 | |
bb00b29d TG |
403 | /* Return a thread by port. */ |
404 | static darwin_thread_t * | |
405 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
406 | { | |
089354bb SM |
407 | darwin_inferior *priv = get_darwin_inferior (inf); |
408 | ||
b5bddbbb TT |
409 | if (priv != nullptr) |
410 | for (darwin_thread_t *t : priv->threads) | |
411 | { | |
412 | if (t->gdb_port == thread) | |
413 | return t; | |
414 | } | |
bb00b29d | 415 | |
bb00b29d TG |
416 | return NULL; |
417 | } | |
a80b95ba | 418 | |
bb00b29d | 419 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 420 | |
bb00b29d TG |
421 | static void |
422 | darwin_suspend_inferior (struct inferior *inf) | |
423 | { | |
089354bb SM |
424 | darwin_inferior *priv = get_darwin_inferior (inf); |
425 | ||
b5bddbbb | 426 | if (priv != nullptr && !priv->suspended) |
a80b95ba | 427 | { |
bb00b29d | 428 | kern_return_t kret; |
a80b95ba | 429 | |
089354bb | 430 | kret = task_suspend (priv->task); |
bb00b29d | 431 | MACH_CHECK_ERROR (kret); |
a80b95ba | 432 | |
089354bb | 433 | priv->suspended = 1; |
bb00b29d TG |
434 | } |
435 | } | |
a80b95ba | 436 | |
bb00b29d | 437 | /* Resume an inferior at Mach level. */ |
a80b95ba | 438 | |
bb00b29d TG |
439 | static void |
440 | darwin_resume_inferior (struct inferior *inf) | |
441 | { | |
089354bb SM |
442 | darwin_inferior *priv = get_darwin_inferior (inf); |
443 | ||
b5bddbbb | 444 | if (priv != nullptr && priv->suspended) |
bb00b29d TG |
445 | { |
446 | kern_return_t kret; | |
a80b95ba | 447 | |
089354bb | 448 | kret = task_resume (priv->task); |
bb00b29d TG |
449 | MACH_CHECK_ERROR (kret); |
450 | ||
089354bb | 451 | priv->suspended = 0; |
a80b95ba TG |
452 | } |
453 | } | |
454 | ||
bb00b29d TG |
455 | /* Iterator functions. */ |
456 | ||
457 | static int | |
458 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 459 | { |
bb00b29d TG |
460 | darwin_suspend_inferior (inf); |
461 | darwin_check_new_threads (inf); | |
462 | return 0; | |
463 | } | |
464 | ||
465 | static int | |
466 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
467 | { | |
468 | darwin_resume_inferior (inf); | |
469 | return 0; | |
a80b95ba TG |
470 | } |
471 | ||
bb00b29d TG |
472 | static void |
473 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
474 | { | |
475 | printf_unfiltered (_("message header:\n")); | |
476 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
477 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
478 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
479 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
480 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
481 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
482 | ||
483 | if (disp_body) | |
484 | { | |
485 | const unsigned char *data; | |
a6290449 | 486 | const unsigned int *ldata; |
bb00b29d TG |
487 | int size; |
488 | int i; | |
489 | ||
490 | data = (unsigned char *)(hdr + 1); | |
491 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
492 | ||
493 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
494 | { | |
495 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
496 | mach_msg_port_descriptor_t *desc = | |
497 | (mach_msg_port_descriptor_t *)(bod + 1); | |
498 | int k; | |
499 | NDR_record_t *ndr; | |
500 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
501 | bod->msgh_descriptor_count); | |
502 | data += sizeof (mach_msg_body_t); | |
503 | size -= sizeof (mach_msg_body_t); | |
504 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
505 | switch (desc[k].type) | |
506 | { | |
507 | case MACH_MSG_PORT_DESCRIPTOR: | |
508 | printf_unfiltered | |
509 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
510 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
511 | break; | |
512 | default: | |
513 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
514 | k, desc[k].type); | |
515 | break; | |
516 | } | |
517 | data += bod->msgh_descriptor_count | |
518 | * sizeof (mach_msg_port_descriptor_t); | |
519 | size -= bod->msgh_descriptor_count | |
520 | * sizeof (mach_msg_port_descriptor_t); | |
521 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
522 | printf_unfiltered | |
523 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
524 | "int=%02x char=%02x float=%02x\n"), | |
525 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
526 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
527 | data += sizeof (NDR_record_t); | |
528 | size -= sizeof (NDR_record_t); | |
529 | } | |
530 | ||
531 | printf_unfiltered (_(" data:")); | |
a6290449 TG |
532 | ldata = (const unsigned int *)data; |
533 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
534 | printf_unfiltered (" %08x", ldata[i]); | |
bb00b29d TG |
535 | printf_unfiltered (_("\n")); |
536 | } | |
537 | } | |
538 | ||
82b19a4d TG |
539 | /* Adjust inferior data when a new task was created. */ |
540 | ||
541 | static struct inferior * | |
542 | darwin_find_new_inferior (task_t task_port, thread_t thread_port) | |
543 | { | |
544 | int task_pid; | |
545 | struct inferior *inf; | |
546 | kern_return_t kret; | |
547 | mach_port_t prev; | |
548 | ||
549 | /* Find the corresponding pid. */ | |
550 | kret = pid_for_task (task_port, &task_pid); | |
551 | if (kret != KERN_SUCCESS) | |
552 | { | |
553 | MACH_CHECK_ERROR (kret); | |
554 | return NULL; | |
555 | } | |
556 | ||
557 | /* Find the inferior for this pid. */ | |
558 | inf = darwin_find_inferior_by_pid (task_pid); | |
559 | if (inf == NULL) | |
560 | return NULL; | |
561 | ||
089354bb SM |
562 | darwin_inferior *priv = get_darwin_inferior (inf); |
563 | ||
82b19a4d | 564 | /* Deallocate saved exception ports. */ |
089354bb | 565 | darwin_deallocate_exception_ports (priv); |
82b19a4d TG |
566 | |
567 | /* No need to remove dead_name notification, but still... */ | |
089354bb | 568 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d TG |
569 | MACH_NOTIFY_DEAD_NAME, 0, |
570 | MACH_PORT_NULL, | |
571 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
572 | &prev); | |
573 | if (kret != KERN_INVALID_ARGUMENT) | |
574 | MACH_CHECK_ERROR (kret); | |
575 | ||
576 | /* Replace old task port. */ | |
089354bb | 577 | kret = mach_port_deallocate (gdb_task, priv->task); |
82b19a4d | 578 | MACH_CHECK_ERROR (kret); |
089354bb | 579 | priv->task = task_port; |
82b19a4d TG |
580 | |
581 | darwin_setup_request_notification (inf); | |
582 | darwin_setup_exceptions (inf); | |
583 | ||
584 | return inf; | |
585 | } | |
586 | ||
587 | /* Check data representation. */ | |
588 | ||
589 | static int | |
590 | darwin_check_message_ndr (NDR_record_t *ndr) | |
591 | { | |
592 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
593 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
594 | || ndr->mig_encoding != NDR_record.mig_encoding | |
595 | || ndr->int_rep != NDR_record.int_rep | |
596 | || ndr->char_rep != NDR_record.char_rep | |
597 | || ndr->float_rep != NDR_record.float_rep) | |
598 | return -1; | |
599 | return 0; | |
600 | } | |
601 | ||
602 | /* Decode an exception message. */ | |
603 | ||
bb00b29d TG |
604 | static int |
605 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
606 | struct inferior **pinf, | |
607 | darwin_thread_t **pthread) | |
a80b95ba | 608 | { |
bb00b29d TG |
609 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
610 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
611 | NDR_record_t *ndr; | |
612 | integer_t *data; | |
613 | struct inferior *inf; | |
614 | darwin_thread_t *thread; | |
615 | task_t task_port; | |
616 | thread_t thread_port; | |
a80b95ba | 617 | kern_return_t kret; |
bb00b29d | 618 | int i; |
a80b95ba | 619 | |
a41f2563 TG |
620 | /* Check message destination. */ |
621 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
622 | return -1; |
623 | ||
624 | /* Check message header. */ | |
625 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
626 | return -1; | |
627 | ||
628 | /* Check descriptors. */ | |
629 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
630 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
631 | || bod->msgh_descriptor_count != 2 | |
632 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
633 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
634 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
635 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
636 | return -1; | |
637 | ||
638 | /* Check data representation. */ | |
639 | ndr = (NDR_record_t *)(desc + 2); | |
82b19a4d | 640 | if (darwin_check_message_ndr (ndr) != 0) |
bb00b29d TG |
641 | return -1; |
642 | ||
643 | /* Ok, the hard work. */ | |
644 | data = (integer_t *)(ndr + 1); | |
645 | ||
bb00b29d TG |
646 | task_port = desc[1].name; |
647 | thread_port = desc[0].name; | |
a41f2563 | 648 | |
a41f2563 | 649 | /* Find process by port. */ |
bb00b29d | 650 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 651 | *pinf = inf; |
82b19a4d TG |
652 | |
653 | if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2 | |
654 | && data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP) | |
655 | { | |
656 | /* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0, | |
657 | as a new Mach task is created when a process exec. */ | |
658 | inf = darwin_find_new_inferior (task_port, thread_port); | |
659 | *pinf = inf; | |
660 | ||
661 | if (inf == NULL) | |
662 | { | |
663 | /* Deallocate task_port, unless it was saved. */ | |
664 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
665 | MACH_CHECK_ERROR (kret); | |
666 | } | |
667 | } | |
668 | else | |
669 | { | |
670 | /* We got new rights to the task, get rid of it. Do not get rid of | |
671 | thread right, as we will need it to find the thread. */ | |
672 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
673 | MACH_CHECK_ERROR (kret); | |
674 | } | |
675 | ||
a41f2563 TG |
676 | if (inf == NULL) |
677 | { | |
678 | /* Not a known inferior. This could happen if the child fork, as | |
679 | the created process will inherit its exception port. | |
680 | FIXME: should the exception port be restored ? */ | |
681 | kern_return_t kret; | |
682 | mig_reply_error_t reply; | |
683 | ||
82b19a4d TG |
684 | inferior_debug |
685 | (4, _("darwin_decode_exception_message: unknown task 0x%x\n"), | |
686 | task_port); | |
687 | ||
15a9128a TG |
688 | /* Free thread port (we don't know it). */ |
689 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
690 | MACH_CHECK_ERROR (kret); | |
691 | ||
a41f2563 TG |
692 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); |
693 | ||
694 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
695 | reply.Head.msgh_size, 0, | |
696 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
697 | MACH_PORT_NULL); | |
698 | MACH_CHECK_ERROR (kret); | |
699 | ||
700 | return 0; | |
701 | } | |
bb00b29d TG |
702 | |
703 | /* Find thread by port. */ | |
704 | /* Check for new threads. Do it early so that the port in the exception | |
705 | message can be deallocated. */ | |
706 | darwin_check_new_threads (inf); | |
707 | ||
15a9128a TG |
708 | /* Free the thread port (as gdb knows the thread, it has already has a right |
709 | for it, so this just decrement a reference counter). */ | |
710 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
711 | MACH_CHECK_ERROR (kret); | |
712 | ||
bb00b29d TG |
713 | thread = darwin_find_thread (inf, thread_port); |
714 | if (thread == NULL) | |
715 | return -1; | |
716 | *pthread = thread; | |
717 | ||
a6290449 TG |
718 | /* The thread should be running. However we have observed cases where a |
719 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
720 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
721 | ||
bb00b29d | 722 | /* Finish decoding. */ |
bb00b29d TG |
723 | thread->event.header = *hdr; |
724 | thread->event.thread_port = thread_port; | |
725 | thread->event.task_port = task_port; | |
726 | thread->event.ex_type = data[0]; | |
727 | thread->event.data_count = data[1]; | |
728 | ||
729 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
730 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
731 | + data[1] * sizeof (integer_t))) | |
732 | return -1; | |
733 | for (i = 0; i < data[1]; i++) | |
734 | thread->event.ex_data[i] = data[2 + i]; | |
735 | ||
736 | thread->msg_state = DARWIN_MESSAGE; | |
737 | ||
738 | return 0; | |
739 | } | |
740 | ||
82b19a4d TG |
741 | /* Decode dead_name notify message. */ |
742 | ||
743 | static int | |
744 | darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf) | |
745 | { | |
746 | NDR_record_t *ndr = (NDR_record_t *)(hdr + 1); | |
747 | integer_t *data = (integer_t *)(ndr + 1); | |
748 | struct inferior *inf; | |
749 | darwin_thread_t *thread; | |
750 | task_t task_port; | |
751 | thread_t thread_port; | |
752 | kern_return_t kret; | |
753 | int i; | |
754 | ||
755 | /* Check message header. */ | |
756 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
757 | return -1; | |
758 | ||
759 | /* Check descriptors. */ | |
760 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t))) | |
761 | return -2; | |
762 | ||
763 | /* Check data representation. */ | |
764 | if (darwin_check_message_ndr (ndr) != 0) | |
765 | return -3; | |
766 | ||
767 | task_port = data[0]; | |
768 | ||
769 | /* Find process by port. */ | |
770 | inf = darwin_find_inferior_by_task (task_port); | |
771 | *pinf = inf; | |
772 | ||
773 | /* Check message destination. */ | |
b5bddbbb TT |
774 | if (inf != NULL) |
775 | { | |
776 | darwin_inferior *priv = get_darwin_inferior (inf); | |
777 | if (hdr->msgh_local_port != priv->notify_port) | |
778 | return -4; | |
779 | } | |
82b19a4d TG |
780 | |
781 | return 0; | |
782 | } | |
783 | ||
bb00b29d TG |
784 | static void |
785 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
786 | integer_t code) | |
787 | { | |
788 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
789 | |
790 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 791 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 792 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
793 | rh->msgh_local_port = MACH_PORT_NULL; |
794 | rh->msgh_id = hdr->msgh_id + 100; | |
795 | ||
796 | reply->NDR = NDR_record; | |
797 | reply->RetCode = code; | |
a80b95ba TG |
798 | } |
799 | ||
bb00b29d TG |
800 | static void |
801 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
802 | { |
803 | kern_return_t kret; | |
bb00b29d | 804 | mig_reply_error_t reply; |
089354bb | 805 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 806 | |
bb00b29d TG |
807 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
808 | ||
809 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
810 | reply.Head.msgh_size, 0, | |
811 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
812 | MACH_PORT_NULL); | |
a80b95ba TG |
813 | MACH_CHECK_ERROR (kret); |
814 | ||
089354bb | 815 | priv->pending_messages--; |
bb00b29d TG |
816 | } |
817 | ||
6821842f SM |
818 | /* Wrapper around the __pthread_kill syscall. We use this instead of the |
819 | pthread_kill function to be able to send a signal to any kind of thread, | |
820 | including GCD threads. */ | |
821 | ||
822 | static int | |
823 | darwin_pthread_kill (darwin_thread_t *thread, int nsignal) | |
824 | { | |
825 | DIAGNOSTIC_PUSH; | |
826 | DIAGNOSTIC_IGNORE_DEPRECATED_DECLARATIONS; | |
827 | int res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
828 | DIAGNOSTIC_POP; | |
829 | return res; | |
830 | } | |
831 | ||
bb00b29d TG |
832 | static void |
833 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
834 | int step, int nsignal) | |
835 | { | |
a80b95ba | 836 | inferior_debug |
bb00b29d TG |
837 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
838 | thread->msg_state, thread->gdb_port, step, nsignal); | |
839 | ||
840 | switch (thread->msg_state) | |
a80b95ba | 841 | { |
bb00b29d TG |
842 | case DARWIN_MESSAGE: |
843 | if (thread->event.ex_type == EXC_SOFTWARE | |
844 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
845 | { | |
846 | /* Either deliver a new signal or cancel the signal received. */ | |
6821842f SM |
847 | int res = PTRACE (PT_THUPDATE, inf->pid, |
848 | (caddr_t) (uintptr_t) thread->gdb_port, nsignal); | |
bb00b29d TG |
849 | if (res < 0) |
850 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
851 | } | |
852 | else if (nsignal) | |
853 | { | |
854 | /* Note: ptrace is allowed only if the process is stopped. | |
855 | Directly send the signal to the thread. */ | |
6821842f | 856 | int res = darwin_pthread_kill (thread, nsignal); |
bb00b29d TG |
857 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), |
858 | thread->gdb_port, nsignal, res); | |
859 | thread->signaled = 1; | |
860 | } | |
861 | ||
d987a266 | 862 | /* Set or reset single step. */ |
aa14fb50 TG |
863 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
864 | thread->gdb_port, step); | |
865 | darwin_set_sstep (thread->gdb_port, step); | |
866 | thread->single_step = step; | |
bb00b29d TG |
867 | |
868 | darwin_send_reply (inf, thread); | |
869 | thread->msg_state = DARWIN_RUNNING; | |
870 | break; | |
871 | ||
872 | case DARWIN_RUNNING: | |
873 | break; | |
874 | ||
875 | case DARWIN_STOPPED: | |
6821842f | 876 | kern_return_t kret = thread_resume (thread->gdb_port); |
bb00b29d TG |
877 | MACH_CHECK_ERROR (kret); |
878 | ||
879 | thread->msg_state = DARWIN_RUNNING; | |
880 | break; | |
a80b95ba | 881 | } |
bb00b29d | 882 | } |
a80b95ba | 883 | |
bb00b29d | 884 | /* Resume all threads of the inferior. */ |
a80b95ba | 885 | |
bb00b29d TG |
886 | static void |
887 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
888 | { | |
089354bb | 889 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 890 | |
b5bddbbb TT |
891 | if (priv != nullptr) |
892 | for (darwin_thread_t *thread : priv->threads) | |
893 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
894 | } |
895 | ||
bb00b29d | 896 | struct resume_inferior_threads_param |
a80b95ba | 897 | { |
bb00b29d TG |
898 | int step; |
899 | int nsignal; | |
900 | }; | |
901 | ||
902 | static int | |
903 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
904 | { | |
905 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
906 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
907 | ||
908 | darwin_resume_inferior_threads (inf, step, nsignal); | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
913 | /* Suspend all threads of INF. */ | |
914 | ||
915 | static void | |
916 | darwin_suspend_inferior_threads (struct inferior *inf) | |
917 | { | |
089354bb | 918 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 919 | |
089354bb SM |
920 | for (darwin_thread_t *thread : priv->threads) |
921 | { | |
922 | switch (thread->msg_state) | |
923 | { | |
924 | case DARWIN_STOPPED: | |
925 | case DARWIN_MESSAGE: | |
926 | break; | |
927 | case DARWIN_RUNNING: | |
928 | { | |
929 | kern_return_t kret = thread_suspend (thread->gdb_port); | |
930 | MACH_CHECK_ERROR (kret); | |
931 | thread->msg_state = DARWIN_STOPPED; | |
932 | break; | |
933 | } | |
934 | } | |
935 | } | |
bb00b29d | 936 | } |
a80b95ba | 937 | |
f6ac5f3d PA |
938 | void |
939 | darwin_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signal) | |
bb00b29d TG |
940 | { |
941 | struct target_waitstatus status; | |
942 | int pid; | |
a80b95ba | 943 | |
bb00b29d TG |
944 | kern_return_t kret; |
945 | int res; | |
946 | int nsignal; | |
947 | struct inferior *inf; | |
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 | { |
a41f2563 TG |
1127 | pid_t res; |
1128 | int wstatus; | |
1129 | ||
1130 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
1131 | if (res < 0 || res != inf->pid) | |
1132 | { | |
1133 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
1134 | res, safe_strerror (errno)); | |
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"), | |
1150 | res, wstatus); | |
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; | |
1364 | int i; | |
1365 | ||
1366 | /* Deallocate threads. */ | |
1367 | darwin_deallocate_threads (inf); | |
1368 | ||
1369 | /* Remove notify_port from darwin_port_set. */ | |
bb00b29d | 1370 | kret = mach_port_move_member (gdb_task, |
089354bb | 1371 | priv->notify_port, MACH_PORT_NULL); |
fda184b6 | 1372 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1373 | |
82b19a4d | 1374 | /* Remove task port dead_name notification. */ |
089354bb | 1375 | kret = mach_port_request_notification (gdb_task, priv->task, |
a80b95ba | 1376 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1377 | MACH_PORT_NULL, |
a80b95ba TG |
1378 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1379 | &prev); | |
1380 | /* This can fail if the task is dead. */ | |
c8c9911f | 1381 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
089354bb | 1382 | priv->task, prev, priv->notify_port); |
bb00b29d | 1383 | |
a80b95ba TG |
1384 | if (kret == KERN_SUCCESS) |
1385 | { | |
1386 | kret = mach_port_deallocate (gdb_task, prev); | |
1387 | MACH_CHECK_ERROR (kret); | |
1388 | } | |
1389 | ||
82b19a4d | 1390 | /* Destroy notify_port. */ |
089354bb | 1391 | kret = mach_port_destroy (gdb_task, priv->notify_port); |
bb00b29d TG |
1392 | MACH_CHECK_ERROR (kret); |
1393 | ||
a80b95ba | 1394 | /* Deallocate saved exception ports. */ |
089354bb | 1395 | darwin_deallocate_exception_ports (priv); |
a80b95ba | 1396 | |
82b19a4d | 1397 | /* Deallocate task port. */ |
089354bb | 1398 | kret = mach_port_deallocate (gdb_task, priv->task); |
a80b95ba TG |
1399 | MACH_CHECK_ERROR (kret); |
1400 | ||
fe978cb0 | 1401 | inf->priv = NULL; |
a80b95ba | 1402 | |
f6ac5f3d | 1403 | inf_child_target::mourn_inferior (); |
a80b95ba TG |
1404 | } |
1405 | ||
1406 | static void | |
bb00b29d | 1407 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1408 | { |
089354bb | 1409 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1410 | |
089354bb | 1411 | for (darwin_thread_t *t : priv->threads) |
bb00b29d TG |
1412 | { |
1413 | if (t->msg_state == DARWIN_MESSAGE) | |
1414 | darwin_resume_thread (inf, t, 0, 0); | |
1415 | } | |
a80b95ba TG |
1416 | } |
1417 | ||
1418 | static void | |
bb00b29d | 1419 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1420 | { |
1421 | struct target_waitstatus wstatus; | |
1422 | ptid_t ptid; | |
1423 | kern_return_t kret; | |
1424 | int status; | |
1425 | int res; | |
089354bb | 1426 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1427 | |
bb00b29d | 1428 | gdb_assert (inf != NULL); |
a80b95ba | 1429 | |
bb00b29d | 1430 | darwin_suspend_inferior (inf); |
a80b95ba | 1431 | |
bb00b29d | 1432 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1433 | |
089354bb | 1434 | if (priv->no_ptrace) |
bb00b29d | 1435 | return; |
a80b95ba | 1436 | |
bb00b29d TG |
1437 | res = kill (inf->pid, SIGSTOP); |
1438 | if (res != 0) | |
b37520b6 | 1439 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1440 | |
bb00b29d TG |
1441 | /* Wait until the process is really stopped. */ |
1442 | while (1) | |
a80b95ba | 1443 | { |
bb00b29d TG |
1444 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1445 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 1446 | && wstatus.value.sig == GDB_SIGNAL_STOP) |
bb00b29d | 1447 | break; |
a80b95ba TG |
1448 | } |
1449 | } | |
1450 | ||
1451 | static kern_return_t | |
1452 | darwin_save_exception_ports (darwin_inferior *inf) | |
1453 | { | |
1454 | kern_return_t kret; | |
1455 | ||
1456 | inf->exception_info.count = | |
1457 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1458 | ||
1459 | kret = task_get_exception_ports | |
1460 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1461 | &inf->exception_info.count, inf->exception_info.ports, | |
1462 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1463 | return kret; | |
1464 | } | |
1465 | ||
1466 | static kern_return_t | |
1467 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1468 | { | |
1469 | int i; | |
1470 | kern_return_t kret; | |
1471 | ||
1472 | for (i = 0; i < inf->exception_info.count; i++) | |
1473 | { | |
1474 | kret = task_set_exception_ports | |
1475 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1476 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1477 | if (kret != KERN_SUCCESS) | |
1478 | return kret; | |
1479 | } | |
1480 | ||
1481 | return KERN_SUCCESS; | |
1482 | } | |
1483 | ||
82b19a4d TG |
1484 | /* Deallocate saved exception ports. */ |
1485 | ||
1486 | static void | |
1487 | darwin_deallocate_exception_ports (darwin_inferior *inf) | |
1488 | { | |
1489 | int i; | |
1490 | kern_return_t kret; | |
1491 | ||
1492 | for (i = 0; i < inf->exception_info.count; i++) | |
1493 | { | |
1494 | kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]); | |
1495 | MACH_CHECK_ERROR (kret); | |
1496 | } | |
1497 | inf->exception_info.count = 0; | |
1498 | } | |
1499 | ||
1500 | static void | |
1501 | darwin_setup_exceptions (struct inferior *inf) | |
1502 | { | |
089354bb | 1503 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1504 | kern_return_t kret; |
1505 | int traps_expected; | |
1506 | exception_mask_t mask; | |
1507 | ||
089354bb | 1508 | kret = darwin_save_exception_ports (priv); |
82b19a4d TG |
1509 | if (kret != KERN_SUCCESS) |
1510 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1511 | "returned: %d"), | |
1512 | kret); | |
1513 | ||
1514 | /* Set exception port. */ | |
1515 | if (enable_mach_exceptions) | |
1516 | mask = EXC_MASK_ALL; | |
1517 | else | |
1518 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
089354bb | 1519 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
82b19a4d TG |
1520 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
1521 | if (kret != KERN_SUCCESS) | |
1522 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1523 | "returned: %d"), | |
1524 | kret); | |
1525 | } | |
1526 | ||
f6ac5f3d PA |
1527 | void |
1528 | darwin_nat_target::kill () | |
bb00b29d TG |
1529 | { |
1530 | struct inferior *inf = current_inferior (); | |
089354bb | 1531 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
1532 | struct target_waitstatus wstatus; |
1533 | ptid_t ptid; | |
1534 | kern_return_t kret; | |
1535 | int status; | |
1536 | int res; | |
1537 | ||
d7e15655 | 1538 | if (inferior_ptid == null_ptid) |
bb00b29d TG |
1539 | return; |
1540 | ||
1541 | gdb_assert (inf != NULL); | |
1542 | ||
089354bb | 1543 | kret = darwin_restore_exception_ports (priv); |
ee41036f | 1544 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1545 | |
ee41036f | 1546 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1547 | |
f6ac5f3d | 1548 | res = ::kill (inf->pid, 9); |
bb00b29d | 1549 | |
ee41036f | 1550 | if (res == 0) |
bb00b29d | 1551 | { |
15843549 XR |
1552 | /* On MacOS version Sierra, the darwin_restore_exception_ports call |
1553 | does not work as expected. | |
1554 | When the kill function is called, the SIGKILL signal is received | |
1555 | by gdb whereas it should have been received by the kernel since | |
1556 | the exception ports have been restored. | |
1557 | This behavior is not the expected one thus gdb does not reply to | |
1558 | the received SIGKILL message. This situation leads to a "busy" | |
1559 | resource from the kernel point of view and the inferior is never | |
1560 | released, causing it to remain as a zombie process, even after | |
1561 | GDB exits. | |
1562 | To work around this, we mark all the threads of the inferior as | |
1563 | signaled thus darwin_decode_message function knows that the kill | |
1564 | signal was sent by gdb and will take the appropriate action | |
1565 | (cancel signal and reply to the signal message). */ | |
1566 | darwin_inferior *priv = get_darwin_inferior (inf); | |
1567 | for (darwin_thread_t *thread : priv->threads) | |
1568 | thread->signaled = 1; | |
1569 | ||
bb00b29d | 1570 | darwin_resume_inferior (inf); |
a6290449 | 1571 | |
bb00b29d TG |
1572 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1573 | } | |
ee41036f TG |
1574 | else if (errno != ESRCH) |
1575 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1576 | inf->pid, safe_strerror (errno)); | |
bb00b29d | 1577 | |
bc1e6c81 | 1578 | target_mourn_inferior (inferior_ptid); |
bb00b29d TG |
1579 | } |
1580 | ||
82b19a4d TG |
1581 | static void |
1582 | darwin_setup_request_notification (struct inferior *inf) | |
1583 | { | |
089354bb | 1584 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1585 | kern_return_t kret; |
1586 | mach_port_t prev_not; | |
1587 | ||
089354bb | 1588 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d | 1589 | MACH_NOTIFY_DEAD_NAME, 0, |
089354bb | 1590 | priv->notify_port, |
82b19a4d TG |
1591 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1592 | &prev_not); | |
1593 | if (kret != KERN_SUCCESS) | |
1594 | error (_("Termination notification request failed, " | |
1595 | "mach_port_request_notification\n" | |
1596 | "returned: %d"), | |
1597 | kret); | |
1598 | if (prev_not != MACH_PORT_NULL) | |
1599 | { | |
1600 | /* This is unexpected, as there should not be any previously | |
1601 | registered notification request. But this is not a fatal | |
1602 | issue, so just emit a warning. */ | |
1603 | warning (_("\ | |
1604 | A task termination request was registered before the debugger registered\n\ | |
1605 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1606 | impact on the debugging session.")); | |
1607 | } | |
1608 | } | |
1609 | ||
bb00b29d TG |
1610 | static void |
1611 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1612 | { |
a80b95ba TG |
1613 | kern_return_t kret; |
1614 | mach_port_t prev_port; | |
1615 | int traps_expected; | |
bb00b29d | 1616 | mach_port_t prev_not; |
a80b95ba TG |
1617 | exception_mask_t mask; |
1618 | ||
089354bb SM |
1619 | darwin_inferior *priv = new darwin_inferior; |
1620 | inf->priv.reset (priv); | |
bb00b29d | 1621 | |
a50c11c6 | 1622 | TRY |
a80b95ba | 1623 | { |
a50c11c6 TT |
1624 | kret = task_for_pid (gdb_task, inf->pid, &priv->task); |
1625 | if (kret != KERN_SUCCESS) | |
a80b95ba | 1626 | { |
a50c11c6 | 1627 | int status; |
a80b95ba | 1628 | |
a50c11c6 TT |
1629 | if (!inf->attach_flag) |
1630 | { | |
1631 | kill (inf->pid, 9); | |
1632 | waitpid (inf->pid, &status, 0); | |
1633 | } | |
a80b95ba | 1634 | |
a50c11c6 TT |
1635 | error |
1636 | (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
1637 | " (please check gdb is codesigned - see taskgated(8))"), | |
1638 | inf->pid, mach_error_string (kret), (unsigned long) kret); | |
1639 | } | |
a80b95ba | 1640 | |
a50c11c6 TT |
1641 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
1642 | priv->task, inf->pid); | |
a80b95ba | 1643 | |
a50c11c6 TT |
1644 | if (darwin_ex_port == MACH_PORT_NULL) |
1645 | { | |
1646 | /* Create a port to get exceptions. */ | |
1647 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1648 | &darwin_ex_port); | |
1649 | if (kret != KERN_SUCCESS) | |
1650 | error (_("Unable to create exception port, mach_port_allocate " | |
1651 | "returned: %d"), | |
1652 | kret); | |
1653 | ||
1654 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, | |
1655 | darwin_ex_port, | |
1656 | MACH_MSG_TYPE_MAKE_SEND); | |
1657 | if (kret != KERN_SUCCESS) | |
1658 | error (_("Unable to create exception port, mach_port_insert_right " | |
1659 | "returned: %d"), | |
1660 | kret); | |
1661 | ||
1662 | /* Create a port set and put ex_port in it. */ | |
1663 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1664 | &darwin_port_set); | |
1665 | if (kret != KERN_SUCCESS) | |
1666 | error (_("Unable to create port set, mach_port_allocate " | |
1667 | "returned: %d"), | |
1668 | kret); | |
1669 | ||
1670 | kret = mach_port_move_member (gdb_task, darwin_ex_port, | |
1671 | darwin_port_set); | |
1672 | if (kret != KERN_SUCCESS) | |
1673 | error (_("Unable to move exception port into new port set, " | |
1674 | "mach_port_move_member\n" | |
1675 | "returned: %d"), | |
1676 | kret); | |
1677 | } | |
a80b95ba | 1678 | |
a50c11c6 TT |
1679 | /* Create a port to be notified when the child task terminates. */ |
1680 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1681 | &priv->notify_port); | |
fda184b6 | 1682 | if (kret != KERN_SUCCESS) |
a50c11c6 | 1683 | error (_("Unable to create notification port, mach_port_allocate " |
fda184b6 JB |
1684 | "returned: %d"), |
1685 | kret); | |
a80b95ba | 1686 | |
a50c11c6 TT |
1687 | kret = mach_port_move_member (gdb_task, |
1688 | priv->notify_port, darwin_port_set); | |
fda184b6 | 1689 | if (kret != KERN_SUCCESS) |
a50c11c6 | 1690 | error (_("Unable to move notification port into new port set, " |
fda184b6 JB |
1691 | "mach_port_move_member\n" |
1692 | "returned: %d"), | |
1693 | kret); | |
a80b95ba | 1694 | |
a50c11c6 | 1695 | darwin_setup_request_notification (inf); |
a80b95ba | 1696 | |
a50c11c6 TT |
1697 | darwin_setup_exceptions (inf); |
1698 | } | |
1699 | CATCH (ex, RETURN_MASK_ALL) | |
1700 | { | |
a7d0f0f0 | 1701 | exit_inferior (inf); |
a50c11c6 | 1702 | inferior_ptid = null_ptid; |
a80b95ba | 1703 | |
a50c11c6 TT |
1704 | throw_exception (ex); |
1705 | } | |
1706 | END_CATCH | |
a80b95ba | 1707 | |
59f413d5 | 1708 | target_ops *darwin_ops = get_native_target (); |
6a3cb8e8 PA |
1709 | if (!target_is_pushed (darwin_ops)) |
1710 | push_target (darwin_ops); | |
a80b95ba TG |
1711 | } |
1712 | ||
7aabaf9d | 1713 | /* Get the thread_info object corresponding to this darwin_thread_info. */ |
db665f42 SM |
1714 | |
1715 | static struct thread_info * | |
7aabaf9d | 1716 | thread_info_from_private_thread_info (darwin_thread_info *pti) |
db665f42 SM |
1717 | { |
1718 | struct thread_info *it; | |
1719 | ||
1720 | ALL_THREADS (it) | |
1721 | { | |
7aabaf9d SM |
1722 | darwin_thread_info *iter_pti = get_darwin_thread_info (it); |
1723 | ||
1724 | if (iter_pti->gdb_port == pti->gdb_port) | |
db665f42 SM |
1725 | break; |
1726 | } | |
1727 | ||
1728 | gdb_assert (it != NULL); | |
1729 | ||
1730 | return it; | |
1731 | } | |
1732 | ||
a80b95ba | 1733 | static void |
bb00b29d | 1734 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1735 | { |
a80b95ba TG |
1736 | darwin_check_new_threads (inf); |
1737 | ||
089354bb | 1738 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 1739 | |
089354bb SM |
1740 | gdb_assert (!priv->threads.empty ()); |
1741 | ||
7aabaf9d | 1742 | darwin_thread_info *first_pti = priv->threads.front (); |
db665f42 SM |
1743 | struct thread_info *first_thread |
1744 | = thread_info_from_private_thread_info (first_pti); | |
1745 | ||
1746 | inferior_ptid = first_thread->ptid; | |
bb00b29d TG |
1747 | } |
1748 | ||
1749 | /* The child must synchronize with gdb: gdb must set the exception port | |
1750 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1751 | FIXME: is there a lighter way ? */ | |
1752 | static int ptrace_fds[2]; | |
1753 | ||
1754 | static void | |
1755 | darwin_ptrace_me (void) | |
1756 | { | |
1757 | int res; | |
1758 | char c; | |
1759 | ||
1760 | /* Close write end point. */ | |
0db8980c SDJ |
1761 | if (close (ptrace_fds[1]) < 0) |
1762 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1763 | |
1764 | /* Wait until gdb is ready. */ | |
1765 | res = read (ptrace_fds[0], &c, 1); | |
fda184b6 | 1766 | if (res != 0) |
0db8980c SDJ |
1767 | trace_start_error (_("unable to read from pipe, read returned: %d"), res); |
1768 | ||
1769 | if (close (ptrace_fds[0]) < 0) | |
1770 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1771 | |
1772 | /* Get rid of privileges. */ | |
0db8980c SDJ |
1773 | if (setegid (getgid ()) < 0) |
1774 | trace_start_error_with_name ("setegid"); | |
bb00b29d TG |
1775 | |
1776 | /* Set TRACEME. */ | |
0db8980c SDJ |
1777 | if (PTRACE (PT_TRACE_ME, 0, 0, 0) < 0) |
1778 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1779 | |
1780 | /* Redirect signals to exception port. */ | |
0db8980c SDJ |
1781 | if (PTRACE (PT_SIGEXC, 0, 0, 0) < 0) |
1782 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1783 | } |
1784 | ||
1785 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1786 | static void | |
1787 | darwin_pre_ptrace (void) | |
1788 | { | |
1789 | if (pipe (ptrace_fds) != 0) | |
1790 | { | |
1791 | ptrace_fds[0] = -1; | |
1792 | ptrace_fds[1] = -1; | |
1793 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1794 | } | |
21ff4686 TT |
1795 | |
1796 | mark_fd_no_cloexec (ptrace_fds[0]); | |
1797 | mark_fd_no_cloexec (ptrace_fds[1]); | |
a80b95ba TG |
1798 | } |
1799 | ||
1800 | static void | |
1801 | darwin_ptrace_him (int pid) | |
1802 | { | |
1803 | task_t itask; | |
1804 | kern_return_t kret; | |
1805 | mach_port_t prev_port; | |
1806 | int traps_expected; | |
bb00b29d | 1807 | struct inferior *inf = current_inferior (); |
a80b95ba | 1808 | |
bb00b29d | 1809 | darwin_attach_pid (inf); |
a80b95ba TG |
1810 | |
1811 | /* Let's the child run. */ | |
1812 | close (ptrace_fds[0]); | |
1813 | close (ptrace_fds[1]); | |
1814 | ||
21ff4686 TT |
1815 | unmark_fd_no_cloexec (ptrace_fds[0]); |
1816 | unmark_fd_no_cloexec (ptrace_fds[1]); | |
1817 | ||
bb00b29d TG |
1818 | darwin_init_thread_list (inf); |
1819 | ||
2090129c | 1820 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
a80b95ba TG |
1821 | } |
1822 | ||
e69860f1 TG |
1823 | static void |
1824 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1825 | { | |
1826 | posix_spawnattr_t attr; | |
1827 | short ps_flags = 0; | |
f00c55f8 | 1828 | int res; |
e69860f1 | 1829 | |
f00c55f8 TG |
1830 | res = posix_spawnattr_init (&attr); |
1831 | if (res != 0) | |
e69860f1 TG |
1832 | { |
1833 | fprintf_unfiltered | |
1834 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); | |
1835 | return; | |
1836 | } | |
1837 | ||
1838 | /* Do like execve: replace the image. */ | |
1839 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1840 | ||
1841 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1842 | kernel include files. */ | |
1843 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1844 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1845 | #endif | |
1846 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1847 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1848 | if (res != 0) | |
e69860f1 | 1849 | { |
f00c55f8 | 1850 | fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1851 | return; |
1852 | } | |
1853 | ||
1854 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1855 | } | |
1856 | ||
d6be54ef XR |
1857 | /* Read kernel version, and return TRUE on Sierra or later. */ |
1858 | ||
1859 | static bool | |
1860 | should_disable_startup_with_shell () | |
1861 | { | |
1862 | char str[16]; | |
1863 | size_t sz = sizeof (str); | |
1864 | int ret; | |
1865 | ||
1866 | ret = sysctlbyname ("kern.osrelease", str, &sz, NULL, 0); | |
1867 | if (ret == 0 && sz < sizeof (str)) | |
1868 | { | |
1869 | unsigned long ver = strtoul (str, NULL, 10); | |
1870 | if (ver >= 16) | |
1871 | return true; | |
1872 | } | |
1873 | return false; | |
1874 | } | |
1875 | ||
f6ac5f3d PA |
1876 | void |
1877 | darwin_nat_target::create_inferior (const char *exec_file, | |
1878 | const std::string &allargs, | |
1879 | char **env, int from_tty) | |
a80b95ba | 1880 | { |
d6be54ef XR |
1881 | gdb::optional<scoped_restore_tmpl<int>> restore_startup_with_shell; |
1882 | ||
1883 | if (startup_with_shell && should_disable_startup_with_shell ()) | |
1884 | { | |
1885 | warning (_("startup-with-shell not supported on this macOS version," | |
1886 | " disabling it.")); | |
1887 | restore_startup_with_shell.emplace (&startup_with_shell, 0); | |
1888 | } | |
1889 | ||
a80b95ba | 1890 | /* Do the hard work. */ |
db665f42 SM |
1891 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, |
1892 | darwin_ptrace_him, darwin_pre_ptrace, NULL, | |
1893 | darwin_execvp); | |
a80b95ba TG |
1894 | } |
1895 | \f | |
1896 | ||
726ce67c JB |
1897 | /* Set things up such that the next call to darwin_wait will immediately |
1898 | return a fake stop event for inferior INF. | |
1899 | ||
1900 | This assumes that the inferior's thread list has been initialized, | |
1901 | as it will suspend the inferior's first thread. */ | |
1902 | ||
1903 | static void | |
1904 | darwin_setup_fake_stop_event (struct inferior *inf) | |
1905 | { | |
089354bb | 1906 | darwin_inferior *priv = get_darwin_inferior (inf); |
726ce67c JB |
1907 | darwin_thread_t *thread; |
1908 | kern_return_t kret; | |
1909 | ||
1910 | gdb_assert (darwin_inf_fake_stop == NULL); | |
1911 | darwin_inf_fake_stop = inf; | |
1912 | ||
1913 | /* When detecting a fake pending stop event, darwin_wait returns | |
1914 | an event saying that the first thread is in a DARWIN_STOPPED | |
1915 | state. To make that accurate, we need to suspend that thread | |
1916 | as well. Otherwise, we'll try resuming it when resuming the | |
1917 | inferior, and get a warning because the thread's suspend count | |
1918 | is already zero, making the resume request useless. */ | |
089354bb | 1919 | thread = priv->threads[0]; |
726ce67c JB |
1920 | kret = thread_suspend (thread->gdb_port); |
1921 | MACH_CHECK_ERROR (kret); | |
1922 | } | |
1923 | ||
a80b95ba TG |
1924 | /* Attach to process PID, then initialize for debugging it |
1925 | and wait for the trace-trap that results from attaching. */ | |
f6ac5f3d PA |
1926 | void |
1927 | darwin_nat_target::attach (const char *args, int from_tty) | |
a80b95ba TG |
1928 | { |
1929 | pid_t pid; | |
1930 | pid_t pid2; | |
1931 | int wstatus; | |
1932 | int res; | |
1933 | struct inferior *inf; | |
bb00b29d | 1934 | kern_return_t kret; |
a80b95ba | 1935 | |
74164c56 | 1936 | pid = parse_pid_to_attach (args); |
a80b95ba | 1937 | |
74164c56 | 1938 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1939 | error (_("I refuse to debug myself!")); |
1940 | ||
1941 | if (from_tty) | |
bb00b29d TG |
1942 | { |
1943 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1944 | |
bb00b29d TG |
1945 | if (exec_file) |
1946 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
f2907e49 | 1947 | target_pid_to_str (ptid_t (pid))); |
bb00b29d TG |
1948 | else |
1949 | printf_unfiltered (_("Attaching to %s\n"), | |
f2907e49 | 1950 | target_pid_to_str (ptid_t (pid))); |
bb00b29d TG |
1951 | |
1952 | gdb_flush (gdb_stdout); | |
1953 | } | |
1954 | ||
f6ac5f3d | 1955 | if (pid == 0 || ::kill (pid, 0) < 0) |
bb00b29d TG |
1956 | error (_("Can't attach to process %d: %s (%d)"), |
1957 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1958 | |
f2907e49 | 1959 | inferior_ptid = ptid_t (pid); |
6c95b8df PA |
1960 | inf = current_inferior (); |
1961 | inferior_appeared (inf, pid); | |
a80b95ba | 1962 | inf->attach_flag = 1; |
6c95b8df | 1963 | |
bb00b29d | 1964 | darwin_attach_pid (inf); |
a80b95ba | 1965 | |
bb00b29d | 1966 | darwin_suspend_inferior (inf); |
a80b95ba | 1967 | |
bb00b29d | 1968 | darwin_init_thread_list (inf); |
a80b95ba | 1969 | |
089354bb SM |
1970 | darwin_inferior *priv = get_darwin_inferior (inf); |
1971 | ||
cc6bcb54 | 1972 | darwin_check_osabi (priv, inferior_ptid.tid ()); |
a80b95ba | 1973 | |
726ce67c JB |
1974 | darwin_setup_fake_stop_event (inf); |
1975 | ||
089354bb | 1976 | priv->no_ptrace = 1; |
a80b95ba TG |
1977 | } |
1978 | ||
1979 | /* Take a program previously attached to and detaches it. | |
1980 | The program resumes execution and will no longer stop | |
1981 | on signals, etc. We'd better not have left any breakpoints | |
1982 | in the program or it'll die when it hits one. For this | |
1983 | to work, it may be necessary for the process to have been | |
1984 | previously attached. It *might* work if the program was | |
1985 | started via fork. */ | |
f6ac5f3d PA |
1986 | |
1987 | void | |
1988 | darwin_nat_target::detach (inferior *inf, int from_tty) | |
a80b95ba | 1989 | { |
e99b03dc | 1990 | pid_t pid = inferior_ptid.pid (); |
089354bb | 1991 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
1992 | kern_return_t kret; |
1993 | int res; | |
1994 | ||
bb00b29d | 1995 | /* Display message. */ |
0f48b757 | 1996 | target_announce_detach (from_tty); |
a80b95ba | 1997 | |
bb00b29d | 1998 | /* If ptrace() is in use, stop the process. */ |
089354bb | 1999 | if (!priv->no_ptrace) |
bb00b29d | 2000 | darwin_stop_inferior (inf); |
a80b95ba | 2001 | |
089354bb | 2002 | kret = darwin_restore_exception_ports (priv); |
a80b95ba TG |
2003 | MACH_CHECK_ERROR (kret); |
2004 | ||
089354bb | 2005 | if (!priv->no_ptrace) |
a80b95ba | 2006 | { |
bb00b29d TG |
2007 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
2008 | if (res != 0) | |
2009 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
2010 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
2011 | } |
2012 | ||
bb00b29d | 2013 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 2014 | |
5e9bc145 JB |
2015 | /* When using ptrace, we have just performed a PT_DETACH, which |
2016 | resumes the inferior. On the other hand, when we are not using | |
2017 | ptrace, we need to resume its execution ourselves. */ | |
089354bb | 2018 | if (priv->no_ptrace) |
5e9bc145 | 2019 | darwin_resume_inferior (inf); |
a80b95ba | 2020 | |
f6ac5f3d | 2021 | mourn_inferior (); |
a80b95ba TG |
2022 | } |
2023 | ||
f6ac5f3d PA |
2024 | const char * |
2025 | darwin_nat_target::pid_to_str (ptid_t ptid) | |
a80b95ba | 2026 | { |
bb00b29d | 2027 | static char buf[80]; |
cc6bcb54 | 2028 | long tid = ptid.tid (); |
bb00b29d TG |
2029 | |
2030 | if (tid != 0) | |
2031 | { | |
2032 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
e99b03dc | 2033 | tid, ptid.pid ()); |
bb00b29d TG |
2034 | return buf; |
2035 | } | |
a80b95ba | 2036 | |
bb00b29d | 2037 | return normal_pid_to_str (ptid); |
a80b95ba TG |
2038 | } |
2039 | ||
57810aa7 | 2040 | bool |
f6ac5f3d | 2041 | darwin_nat_target::thread_alive (ptid_t ptid) |
a80b95ba | 2042 | { |
57810aa7 | 2043 | return true; |
a80b95ba TG |
2044 | } |
2045 | ||
2046 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
2047 | copy it to RDADDR in gdb's address space. | |
2048 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
2049 | to ADDR in inferior task's address space. | |
f00c55f8 | 2050 | Return 0 on failure; number of bytes read / writen otherwise. */ |
3eb831e0 | 2051 | |
a80b95ba TG |
2052 | static int |
2053 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 2054 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 2055 | ULONGEST length) |
a80b95ba | 2056 | { |
bb00b29d | 2057 | kern_return_t kret; |
3eb831e0 | 2058 | mach_vm_size_t res_length = 0; |
a80b95ba | 2059 | pointer_t copied; |
b9dd1947 | 2060 | mach_msg_type_number_t copy_count; |
a80b95ba TG |
2061 | mach_vm_size_t remaining_length; |
2062 | mach_vm_address_t region_address; | |
2063 | mach_vm_size_t region_length; | |
2064 | ||
b55e14c7 YQ |
2065 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
2066 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 2067 | |
3eb831e0 TG |
2068 | /* First read. */ |
2069 | if (rdaddr != NULL) | |
a80b95ba | 2070 | { |
3eb831e0 | 2071 | mach_vm_size_t count; |
a80b95ba | 2072 | |
3eb831e0 TG |
2073 | /* According to target.h(to_xfer_partial), one and only one may be |
2074 | non-null. */ | |
2075 | gdb_assert (wraddr == NULL); | |
a80b95ba | 2076 | |
3eb831e0 TG |
2077 | kret = mach_vm_read_overwrite (task, addr, length, |
2078 | (mach_vm_address_t) rdaddr, &count); | |
2079 | if (kret != KERN_SUCCESS) | |
2080 | { | |
2081 | inferior_debug | |
2082 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
2083 | core_addr_to_string (addr), mach_error_string (kret)); | |
2084 | return 0; | |
2085 | } | |
2086 | return count; | |
2087 | } | |
a80b95ba | 2088 | |
3eb831e0 TG |
2089 | /* See above. */ |
2090 | gdb_assert (wraddr != NULL); | |
a80b95ba | 2091 | |
3eb831e0 | 2092 | while (length != 0) |
a80b95ba | 2093 | { |
3eb831e0 TG |
2094 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
2095 | mach_vm_address_t region_address = (mach_vm_address_t) (addr - offset); | |
2096 | mach_vm_size_t aligned_length = | |
2097 | (mach_vm_size_t) PAGE_ROUND (offset + length); | |
bb00b29d | 2098 | vm_region_submap_short_info_data_64_t info; |
3eb831e0 TG |
2099 | mach_msg_type_number_t count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; |
2100 | natural_t region_depth = 1000; | |
bb00b29d | 2101 | mach_vm_address_t region_start = region_address; |
3eb831e0 TG |
2102 | mach_vm_size_t region_length; |
2103 | mach_vm_size_t write_length; | |
bb00b29d | 2104 | |
3eb831e0 | 2105 | /* Read page protection. */ |
bb00b29d TG |
2106 | kret = mach_vm_region_recurse |
2107 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
2108 | (vm_region_recurse_info_t) &info, &count); | |
2109 | ||
2110 | if (kret != KERN_SUCCESS) | |
a80b95ba | 2111 | { |
bb00b29d TG |
2112 | inferior_debug (1, _("darwin_read_write_inferior: " |
2113 | "mach_vm_region_recurse failed at %s: %s\n"), | |
2114 | core_addr_to_string (region_address), | |
2115 | mach_error_string (kret)); | |
3eb831e0 | 2116 | return res_length; |
a80b95ba TG |
2117 | } |
2118 | ||
bb00b29d TG |
2119 | inferior_debug |
2120 | (9, _("darwin_read_write_inferior: " | |
2121 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
2122 | core_addr_to_string (region_address), | |
2123 | core_addr_to_string (region_start), | |
2124 | core_addr_to_string (region_length)); | |
2125 | ||
0963b4bd | 2126 | /* Check for holes in memory. */ |
bb00b29d | 2127 | if (region_start > region_address) |
a80b95ba | 2128 | { |
0963b4bd | 2129 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 2130 | core_addr_to_string (region_address), |
bb00b29d | 2131 | core_addr_to_string (region_start), |
a80b95ba | 2132 | (unsigned)region_length); |
3eb831e0 | 2133 | return res_length; |
a80b95ba TG |
2134 | } |
2135 | ||
bb00b29d TG |
2136 | /* Adjust the length. */ |
2137 | region_length -= (region_address - region_start); | |
3eb831e0 TG |
2138 | if (region_length > aligned_length) |
2139 | region_length = aligned_length; | |
bb00b29d | 2140 | |
3eb831e0 TG |
2141 | /* Make the pages RW. */ |
2142 | if (!(info.protection & VM_PROT_WRITE)) | |
a80b95ba | 2143 | { |
3eb831e0 TG |
2144 | vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE; |
2145 | ||
2146 | kret = mach_vm_protect (task, region_address, region_length, | |
2147 | FALSE, prot); | |
bb00b29d TG |
2148 | if (kret != KERN_SUCCESS) |
2149 | { | |
3eb831e0 TG |
2150 | prot |= VM_PROT_COPY; |
2151 | kret = mach_vm_protect (task, region_address, region_length, | |
2152 | FALSE, prot); | |
2153 | } | |
2154 | if (kret != KERN_SUCCESS) | |
2155 | { | |
2156 | warning (_("darwin_read_write_inferior: " | |
2157 | "mach_vm_protect failed at %s " | |
2158 | "(len=0x%lx, prot=0x%x): %s"), | |
bb00b29d | 2159 | core_addr_to_string (region_address), |
3eb831e0 | 2160 | (unsigned long) region_length, (unsigned) prot, |
bb00b29d | 2161 | mach_error_string (kret)); |
3eb831e0 | 2162 | return res_length; |
bb00b29d | 2163 | } |
a80b95ba TG |
2164 | } |
2165 | ||
3eb831e0 TG |
2166 | if (offset + length > region_length) |
2167 | write_length = region_length - offset; | |
2168 | else | |
2169 | write_length = length; | |
2170 | ||
2171 | /* Write. */ | |
2172 | kret = mach_vm_write (task, addr, (vm_offset_t) wraddr, write_length); | |
2173 | if (kret != KERN_SUCCESS) | |
2174 | { | |
2175 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
2176 | mach_error_string (kret)); | |
2177 | return res_length; | |
2178 | } | |
2179 | ||
2180 | /* Restore page rights. */ | |
a80b95ba TG |
2181 | if (!(info.protection & VM_PROT_WRITE)) |
2182 | { | |
bb00b29d | 2183 | kret = mach_vm_protect (task, region_address, region_length, |
3eb831e0 | 2184 | FALSE, info.protection); |
bb00b29d | 2185 | if (kret != KERN_SUCCESS) |
a80b95ba | 2186 | { |
3eb831e0 TG |
2187 | warning (_("darwin_read_write_inferior: " |
2188 | "mach_vm_protect restore failed at %s " | |
2189 | "(len=0x%lx): %s"), | |
bb00b29d | 2190 | core_addr_to_string (region_address), |
3eb831e0 TG |
2191 | (unsigned long) region_length, |
2192 | mach_error_string (kret)); | |
a80b95ba TG |
2193 | } |
2194 | } | |
a80b95ba | 2195 | |
3eb831e0 TG |
2196 | addr += write_length; |
2197 | wraddr += write_length; | |
2198 | res_length += write_length; | |
2199 | length -= write_length; | |
a80b95ba | 2200 | } |
3eb831e0 TG |
2201 | |
2202 | return res_length; | |
a80b95ba TG |
2203 | } |
2204 | ||
f00c55f8 | 2205 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
ad2073b0 | 2206 | to RDADDR (in big endian). |
569283d4 | 2207 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 2208 | |
b967eb24 | 2209 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 2210 | /* This is not available in Darwin 9. */ |
9b409511 | 2211 | static enum target_xfer_status |
b9dd1947 | 2212 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 2213 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
2214 | { |
2215 | struct task_dyld_info task_dyld_info; | |
2216 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
2217 | int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t); | |
2218 | kern_return_t kret; | |
2219 | ||
ad2073b0 | 2220 | if (addr != 0 || length > sizeof (mach_vm_address_t)) |
9b409511 | 2221 | return TARGET_XFER_EOF; |
f00c55f8 | 2222 | |
ad2073b0 TG |
2223 | kret = task_info (task, TASK_DYLD_INFO, |
2224 | (task_info_t) &task_dyld_info, &count); | |
f00c55f8 TG |
2225 | MACH_CHECK_ERROR (kret); |
2226 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 2227 | return TARGET_XFER_E_IO; |
ad2073b0 TG |
2228 | |
2229 | store_unsigned_integer (rdaddr, length, BFD_ENDIAN_BIG, | |
2230 | task_dyld_info.all_image_info_addr); | |
9b409511 YQ |
2231 | *xfered_len = (ULONGEST) length; |
2232 | return TARGET_XFER_OK; | |
f00c55f8 | 2233 | } |
569283d4 | 2234 | #endif |
f00c55f8 | 2235 | |
a80b95ba | 2236 | \f |
a80b95ba | 2237 | |
f6ac5f3d PA |
2238 | enum target_xfer_status |
2239 | darwin_nat_target::xfer_partial (enum target_object object, const char *annex, | |
2240 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
2241 | ULONGEST offset, ULONGEST len, | |
2242 | ULONGEST *xfered_len) | |
a80b95ba | 2243 | { |
bb00b29d | 2244 | struct inferior *inf = current_inferior (); |
089354bb | 2245 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2246 | |
2247 | inferior_debug | |
b55e14c7 YQ |
2248 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
2249 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
2250 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
2251 | inf->pid); | |
a80b95ba | 2252 | |
f00c55f8 TG |
2253 | switch (object) |
2254 | { | |
2255 | case TARGET_OBJECT_MEMORY: | |
9b409511 | 2256 | { |
089354bb | 2257 | int l = darwin_read_write_inferior (priv->task, offset, |
9b409511 YQ |
2258 | readbuf, writebuf, len); |
2259 | ||
2260 | if (l == 0) | |
2261 | return TARGET_XFER_EOF; | |
2262 | else | |
2263 | { | |
2264 | gdb_assert (l > 0); | |
2265 | *xfered_len = (ULONGEST) l; | |
2266 | return TARGET_XFER_OK; | |
2267 | } | |
2268 | } | |
569283d4 | 2269 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
2270 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
2271 | if (writebuf != NULL || readbuf == NULL) | |
2272 | { | |
2273 | /* Support only read. */ | |
2ed4b548 | 2274 | return TARGET_XFER_E_IO; |
f00c55f8 | 2275 | } |
089354bb | 2276 | return darwin_read_dyld_info (priv->task, offset, readbuf, len, |
9b409511 | 2277 | xfered_len); |
569283d4 | 2278 | #endif |
f00c55f8 | 2279 | default: |
2ed4b548 | 2280 | return TARGET_XFER_E_IO; |
f00c55f8 | 2281 | } |
a80b95ba | 2282 | |
a80b95ba TG |
2283 | } |
2284 | ||
2285 | static void | |
0fc76421 | 2286 | set_enable_mach_exceptions (const char *args, int from_tty, |
a80b95ba TG |
2287 | struct cmd_list_element *c) |
2288 | { | |
d7e15655 | 2289 | if (inferior_ptid != null_ptid) |
a80b95ba | 2290 | { |
bb00b29d | 2291 | struct inferior *inf = current_inferior (); |
089354bb | 2292 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
2293 | exception_mask_t mask; |
2294 | kern_return_t kret; | |
2295 | ||
2296 | if (enable_mach_exceptions) | |
2297 | mask = EXC_MASK_ALL; | |
2298 | else | |
2299 | { | |
089354bb | 2300 | darwin_restore_exception_ports (priv); |
bb00b29d | 2301 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
a80b95ba | 2302 | } |
089354bb | 2303 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
a80b95ba TG |
2304 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2305 | MACH_CHECK_ERROR (kret); | |
2306 | } | |
2307 | } | |
2308 | ||
f6ac5f3d PA |
2309 | char * |
2310 | darwin_nat_target::pid_to_exec_file (int pid) | |
bb00b29d | 2311 | { |
b4ab256d | 2312 | static char path[PATH_MAX]; |
bb00b29d TG |
2313 | int res; |
2314 | ||
d8d2a3ee | 2315 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2316 | if (res >= 0) |
2317 | return path; | |
2318 | else | |
2319 | return NULL; | |
2320 | } | |
2321 | ||
f6ac5f3d PA |
2322 | ptid_t |
2323 | darwin_nat_target::get_ada_task_ptid (long lwp, long thread) | |
bb00b29d | 2324 | { |
bb00b29d | 2325 | struct inferior *inf = current_inferior (); |
089354bb | 2326 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2327 | kern_return_t kret; |
2328 | mach_port_name_array_t names; | |
2329 | mach_msg_type_number_t names_count; | |
2330 | mach_port_type_array_t types; | |
2331 | mach_msg_type_number_t types_count; | |
2332 | long res = 0; | |
2333 | ||
2334 | /* First linear search. */ | |
089354bb SM |
2335 | for (darwin_thread_t *t : priv->threads) |
2336 | { | |
2337 | if (t->inf_port == lwp) | |
e99b03dc | 2338 | return ptid_t (inferior_ptid.pid (), 0, t->gdb_port); |
089354bb | 2339 | } |
bb00b29d TG |
2340 | |
2341 | /* Maybe the port was never extract. Do it now. */ | |
2342 | ||
2343 | /* First get inferior port names. */ | |
089354bb | 2344 | kret = mach_port_names (priv->task, &names, &names_count, &types, |
bb00b29d TG |
2345 | &types_count); |
2346 | MACH_CHECK_ERROR (kret); | |
2347 | if (kret != KERN_SUCCESS) | |
2348 | return null_ptid; | |
2349 | ||
2350 | /* For each name, copy the right in the gdb space and then compare with | |
2351 | our view of the inferior threads. We don't forget to deallocate the | |
2352 | right. */ | |
089354bb | 2353 | for (int i = 0; i < names_count; i++) |
bb00b29d TG |
2354 | { |
2355 | mach_port_t local_name; | |
2356 | mach_msg_type_name_t local_type; | |
2357 | ||
2358 | /* We just need to know the corresponding name in gdb name space. | |
2359 | So extract and deallocate the right. */ | |
089354bb | 2360 | kret = mach_port_extract_right (priv->task, names[i], |
bb00b29d TG |
2361 | MACH_MSG_TYPE_COPY_SEND, |
2362 | &local_name, &local_type); | |
2363 | if (kret != KERN_SUCCESS) | |
2364 | continue; | |
2365 | mach_port_deallocate (gdb_task, local_name); | |
2366 | ||
089354bb SM |
2367 | for (darwin_thread_t *t : priv->threads) |
2368 | { | |
2369 | if (t->gdb_port == local_name) | |
2370 | { | |
2371 | t->inf_port = names[i]; | |
2372 | if (names[i] == lwp) | |
2373 | res = t->gdb_port; | |
2374 | } | |
2375 | } | |
bb00b29d TG |
2376 | } |
2377 | ||
2378 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2379 | names_count * sizeof (mach_port_t)); | |
2380 | ||
2381 | if (res) | |
e99b03dc | 2382 | return ptid_t (inferior_ptid.pid (), 0, res); |
bb00b29d TG |
2383 | else |
2384 | return null_ptid; | |
2385 | } | |
2386 | ||
57810aa7 | 2387 | bool |
f6ac5f3d | 2388 | darwin_nat_target::supports_multi_process () |
bb00b29d | 2389 | { |
57810aa7 | 2390 | return true; |
bb00b29d TG |
2391 | } |
2392 | ||
a80b95ba | 2393 | void |
f6ac5f3d | 2394 | _initialize_darwin_nat () |
a80b95ba TG |
2395 | { |
2396 | kern_return_t kret; | |
2397 | ||
a80b95ba TG |
2398 | gdb_task = mach_task_self (); |
2399 | darwin_host_self = mach_host_self (); | |
2400 | ||
2401 | /* Read page size. */ | |
2402 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2403 | if (kret != KERN_SUCCESS) | |
2404 | { | |
2405 | mach_page_size = 0x1000; | |
2406 | MACH_CHECK_ERROR (kret); | |
2407 | } | |
2408 | ||
3eb831e0 TG |
2409 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), |
2410 | (unsigned long) mach_task_self (), getpid ()); | |
a80b95ba | 2411 | |
ccce17b0 YQ |
2412 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2413 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2414 | Set if printing inferior communication debugging statements."), _("\ |
2415 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2416 | NULL, NULL, |
2417 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2418 | |
2419 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2420 | &enable_mach_exceptions, _("\ | |
2421 | Set if mach exceptions are caught."), _("\ | |
2422 | Show if mach exceptions are caught."), _("\ | |
2423 | When this mode is on, all low level exceptions are reported before being\n\ | |
2424 | reported by the kernel."), | |
2425 | &set_enable_mach_exceptions, NULL, | |
2426 | &setlist, &showlist); | |
2427 | } |