]>
Commit | Line | Data |
---|---|---|
a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
1d506c26 | 2 | Copyright (C) 2008-2024 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 | 20 | |
ec452525 | 21 | #include "extract-store-integer.h" |
4de283e4 TT |
22 | #include "top.h" |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "symfile.h" | |
26 | #include "symtab.h" | |
27 | #include "objfiles.h" | |
5b9707eb | 28 | #include "cli/cli-cmds.h" |
4de283e4 TT |
29 | #include "gdbcore.h" |
30 | #include "gdbthread.h" | |
31 | #include "regcache.h" | |
32 | #include "event-top.h" | |
33 | #include "inf-loop.h" | |
34 | #include <sys/stat.h> | |
35 | #include "inf-child.h" | |
36 | #include "value.h" | |
37 | #include "arch-utils.h" | |
38 | #include "bfd.h" | |
39 | #include "bfd/mach-o.h" | |
b1c896b3 | 40 | #include "gdbarch.h" |
a80b95ba | 41 | |
b50a8b9a | 42 | #include <copyfile.h> |
4de283e4 TT |
43 | #include <sys/ptrace.h> |
44 | #include <sys/signal.h> | |
45 | #include <setjmp.h> | |
46 | #include <sys/types.h> | |
47 | #include <unistd.h> | |
48 | #include <signal.h> | |
a80b95ba | 49 | #include <ctype.h> |
4de283e4 TT |
50 | #include <sys/sysctl.h> |
51 | #include <sys/proc.h> | |
bb00b29d | 52 | #include <libproc.h> |
4de283e4 TT |
53 | #include <sys/syscall.h> |
54 | #include <spawn.h> | |
55 | ||
a80b95ba | 56 | #include <mach/mach_error.h> |
d55e5aa6 | 57 | #include <mach/mach_vm.h> |
4de283e4 TT |
58 | #include <mach/mach_init.h> |
59 | #include <mach/vm_map.h> | |
d55e5aa6 | 60 | #include <mach/task.h> |
4de283e4 | 61 | #include <mach/mach_port.h> |
d55e5aa6 | 62 | #include <mach/thread_act.h> |
4de283e4 | 63 | #include <mach/port.h> |
a80b95ba | 64 | |
4de283e4 TT |
65 | #include "darwin-nat.h" |
66 | #include "filenames.h" | |
268a13a5 TT |
67 | #include "gdbsupport/filestuff.h" |
68 | #include "gdbsupport/gdb_unlinker.h" | |
69 | #include "gdbsupport/pathstuff.h" | |
70 | #include "gdbsupport/scoped_fd.h" | |
01ec7a27 | 71 | #include "nat/fork-inferior.h" |
a80b95ba TG |
72 | |
73 | /* Quick overview. | |
74 | Darwin kernel is Mach + BSD derived kernel. Note that they share the | |
75 | same memory space and are linked together (ie there is no micro-kernel). | |
76 | ||
77 | Although ptrace(2) is available on Darwin, it is not complete. We have | |
78 | to use Mach calls to read and write memory and to modify registers. We | |
79 | also use Mach to get inferior faults. As we cannot use select(2) or | |
80 | signals with Mach port (the Mach communication channel), signals are | |
81 | reported to gdb as an exception. Furthermore we detect death of the | |
82 | inferior through a Mach notification message. This way we only wait | |
83 | on Mach ports. | |
84 | ||
85 | Some Mach documentation is available for Apple xnu source package or | |
86 | from the web. */ | |
87 | ||
88 | ||
89 | #define PTRACE(CMD, PID, ADDR, SIG) \ | |
90 | darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG)) | |
91 | ||
a80b95ba TG |
92 | static void darwin_ptrace_me (void); |
93 | ||
a41f2563 TG |
94 | static void darwin_encode_reply (mig_reply_error_t *reply, |
95 | mach_msg_header_t *hdr, integer_t code); | |
96 | ||
82b19a4d TG |
97 | static void darwin_setup_request_notification (struct inferior *inf); |
98 | static void darwin_deallocate_exception_ports (darwin_inferior *inf); | |
99 | static void darwin_setup_exceptions (struct inferior *inf); | |
100 | static void darwin_deallocate_threads (struct inferior *inf); | |
101 | ||
a80b95ba TG |
102 | /* Task identifier of gdb. */ |
103 | static task_t gdb_task; | |
104 | ||
105 | /* A copy of mach_host_self (). */ | |
106 | mach_port_t darwin_host_self; | |
107 | ||
108 | /* Exception port. */ | |
109 | mach_port_t darwin_ex_port; | |
110 | ||
a6290449 | 111 | /* Port set, to wait for answer on all ports. */ |
a80b95ba TG |
112 | mach_port_t darwin_port_set; |
113 | ||
0963b4bd | 114 | /* Page size. */ |
a80b95ba TG |
115 | static vm_size_t mach_page_size; |
116 | ||
117 | /* If Set, catch all mach exceptions (before they are converted to signals | |
118 | by the kernel). */ | |
491144b5 | 119 | static bool enable_mach_exceptions; |
a80b95ba | 120 | |
bb00b29d TG |
121 | /* Inferior that should report a fake stop event. */ |
122 | static struct inferior *darwin_inf_fake_stop; | |
123 | ||
b50a8b9a TT |
124 | /* If non-NULL, the shell we actually invoke. See maybe_cache_shell |
125 | for details. */ | |
126 | static const char *copied_shell; | |
127 | ||
a80b95ba TG |
128 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
129 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
130 | ||
bb00b29d | 131 | /* This controls output of inferior debugging. */ |
ccce17b0 | 132 | static unsigned int darwin_debug_flag = 0; |
a80b95ba | 133 | |
15c19d39 TG |
134 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
135 | be signed. This is required to get an authorization for task_for_pid. | |
136 | ||
a6290449 TG |
137 | Once gdb is built, you must codesign it with any system-trusted signing |
138 | authority. See taskgated(8) for details. */ | |
15c19d39 TG |
139 | static const unsigned char info_plist[] |
140 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
141 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
142 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
143 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
144 | "<plist version=\"1.0\">\n" | |
145 | "<dict>\n" | |
146 | " <key>CFBundleIdentifier</key>\n" | |
147 | " <string>org.gnu.gdb</string>\n" | |
148 | " <key>CFBundleName</key>\n" | |
149 | " <string>gdb</string>\n" | |
150 | " <key>CFBundleVersion</key>\n" | |
151 | " <string>1.0</string>\n" | |
152 | " <key>SecTaskAccess</key>\n" | |
153 | " <array>\n" | |
154 | " <string>allowed</string>\n" | |
155 | " <string>debug</string>\n" | |
156 | " </array>\n" | |
157 | "</dict>\n" | |
158 | "</plist>\n"; | |
159 | ||
77b64a49 PA |
160 | static void inferior_debug (int level, const char *fmt, ...) |
161 | ATTRIBUTE_PRINTF (2, 3); | |
162 | ||
a80b95ba TG |
163 | static void |
164 | inferior_debug (int level, const char *fmt, ...) | |
165 | { | |
166 | va_list ap; | |
167 | ||
168 | if (darwin_debug_flag < level) | |
169 | return; | |
170 | ||
171 | va_start (ap, fmt); | |
6cb06a8c | 172 | gdb_printf (gdb_stdlog, _("[%d inferior]: "), getpid ()); |
cd1c3a45 | 173 | gdb_vprintf (gdb_stdlog, fmt, ap); |
a80b95ba TG |
174 | va_end (ap); |
175 | } | |
176 | ||
177 | void | |
178 | mach_check_error (kern_return_t ret, const char *file, | |
dda83cd7 | 179 | unsigned int line, const char *func) |
a80b95ba TG |
180 | { |
181 | if (ret == KERN_SUCCESS) | |
182 | return; | |
183 | if (func == NULL) | |
184 | func = _("[UNKNOWN]"); | |
bb00b29d | 185 | |
4f1cdeec | 186 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 187 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
188 | } |
189 | ||
190 | static const char * | |
191 | unparse_exception_type (unsigned int i) | |
192 | { | |
193 | static char unknown_exception_buf[32]; | |
194 | ||
195 | switch (i) | |
196 | { | |
197 | case EXC_BAD_ACCESS: | |
198 | return "EXC_BAD_ACCESS"; | |
199 | case EXC_BAD_INSTRUCTION: | |
200 | return "EXC_BAD_INSTRUCTION"; | |
201 | case EXC_ARITHMETIC: | |
202 | return "EXC_ARITHMETIC"; | |
203 | case EXC_EMULATION: | |
204 | return "EXC_EMULATION"; | |
205 | case EXC_SOFTWARE: | |
206 | return "EXC_SOFTWARE"; | |
207 | case EXC_BREAKPOINT: | |
208 | return "EXC_BREAKPOINT"; | |
209 | case EXC_SYSCALL: | |
210 | return "EXC_SYSCALL"; | |
211 | case EXC_MACH_SYSCALL: | |
212 | return "EXC_MACH_SYSCALL"; | |
213 | case EXC_RPC_ALERT: | |
214 | return "EXC_RPC_ALERT"; | |
215 | case EXC_CRASH: | |
216 | return "EXC_CRASH"; | |
217 | default: | |
218 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
219 | return unknown_exception_buf; | |
220 | } | |
221 | } | |
222 | ||
a7aa0d73 JB |
223 | /* Set errno to zero, and then call ptrace with the given arguments. |
224 | If inferior debugging traces are on, then also print a debug | |
225 | trace. | |
226 | ||
227 | The returned value is the same as the value returned by ptrace, | |
228 | except in the case where that value is -1 but errno is zero. | |
229 | This case is documented to be a non-error situation, so we | |
230 | return zero in that case. */ | |
231 | ||
a80b95ba TG |
232 | static int |
233 | darwin_ptrace (const char *name, | |
aa14fb50 | 234 | int request, int pid, caddr_t arg3, int arg4) |
a80b95ba TG |
235 | { |
236 | int ret; | |
237 | ||
a7aa0d73 | 238 | errno = 0; |
aa14fb50 | 239 | ret = ptrace (request, pid, arg3, arg4); |
a7aa0d73 JB |
240 | if (ret == -1 && errno == 0) |
241 | ret = 0; | |
a80b95ba | 242 | |
3eb831e0 | 243 | inferior_debug (4, _("ptrace (%s, %d, 0x%lx, %d): %d (%s)\n"), |
dda83cd7 SM |
244 | name, pid, (unsigned long) arg3, arg4, ret, |
245 | (ret != 0) ? safe_strerror (errno) : _("no error")); | |
a80b95ba TG |
246 | return ret; |
247 | } | |
248 | ||
249 | static int | |
250 | cmp_thread_t (const void *l, const void *r) | |
251 | { | |
bb00b29d TG |
252 | thread_t tl = *(const thread_t *)l; |
253 | thread_t tr = *(const thread_t *)r; | |
254 | return (int)(tl - tr); | |
a80b95ba TG |
255 | } |
256 | ||
e7eee665 SM |
257 | void |
258 | darwin_nat_target::check_new_threads (inferior *inf) | |
a80b95ba TG |
259 | { |
260 | kern_return_t kret; | |
a80b95ba TG |
261 | thread_array_t thread_list; |
262 | unsigned int new_nbr; | |
263 | unsigned int old_nbr; | |
264 | unsigned int new_ix, old_ix; | |
089354bb SM |
265 | darwin_inferior *darwin_inf = get_darwin_inferior (inf); |
266 | std::vector<darwin_thread_t *> new_thread_vec; | |
a80b95ba | 267 | |
b5bddbbb TT |
268 | if (darwin_inf == nullptr) |
269 | return; | |
270 | ||
a80b95ba | 271 | /* Get list of threads. */ |
bb00b29d | 272 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
273 | MACH_CHECK_ERROR (kret); |
274 | if (kret != KERN_SUCCESS) | |
275 | return; | |
276 | ||
bb00b29d | 277 | /* Sort the list. */ |
a80b95ba TG |
278 | if (new_nbr > 1) |
279 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
280 | ||
089354bb | 281 | old_nbr = darwin_inf->threads.size (); |
a80b95ba | 282 | |
bb00b29d TG |
283 | /* Quick check for no changes. */ |
284 | if (old_nbr == new_nbr) | |
285 | { | |
089354bb SM |
286 | size_t i; |
287 | ||
bb00b29d | 288 | for (i = 0; i < new_nbr; i++) |
089354bb | 289 | if (thread_list[i] != darwin_inf->threads[i]->gdb_port) |
bb00b29d TG |
290 | break; |
291 | if (i == new_nbr) | |
292 | { | |
15a9128a TG |
293 | /* Deallocate ports. */ |
294 | for (i = 0; i < new_nbr; i++) | |
295 | { | |
296 | kret = mach_port_deallocate (mach_task_self (), thread_list[i]); | |
297 | MACH_CHECK_ERROR (kret); | |
298 | } | |
299 | ||
300 | /* Deallocate the buffer. */ | |
bb00b29d TG |
301 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
302 | new_nbr * sizeof (int)); | |
303 | MACH_CHECK_ERROR (kret); | |
15a9128a | 304 | |
bb00b29d TG |
305 | return; |
306 | } | |
307 | } | |
308 | ||
82b19a4d | 309 | /* Full handling: detect new threads, remove dead threads. */ |
089354bb SM |
310 | |
311 | new_thread_vec.reserve (new_nbr); | |
bb00b29d | 312 | |
a80b95ba TG |
313 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
314 | { | |
089354bb SM |
315 | thread_t new_id = (new_ix < new_nbr) ? thread_list[new_ix] : THREAD_NULL; |
316 | darwin_thread_t *old | |
317 | = (old_ix < old_nbr) ? darwin_inf->threads[old_ix] : NULL; | |
318 | thread_t old_id = old != NULL ? old->gdb_port : THREAD_NULL; | |
bb00b29d TG |
319 | |
320 | inferior_debug | |
c8c9911f | 321 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"), |
bb00b29d | 322 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
a80b95ba TG |
323 | |
324 | if (old_id == new_id) | |
325 | { | |
326 | /* Thread still exist. */ | |
089354bb | 327 | new_thread_vec.push_back (old); |
a80b95ba TG |
328 | new_ix++; |
329 | old_ix++; | |
330 | ||
15a9128a TG |
331 | /* Deallocate the port. */ |
332 | kret = mach_port_deallocate (gdb_task, new_id); | |
a80b95ba | 333 | MACH_CHECK_ERROR (kret); |
15a9128a | 334 | |
a80b95ba TG |
335 | continue; |
336 | } | |
bb00b29d TG |
337 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
338 | { | |
339 | /* Ignore dead ports. | |
340 | In some weird cases, we might get dead ports. They should | |
341 | correspond to dead thread so they could safely be ignored. */ | |
342 | new_ix++; | |
343 | continue; | |
344 | } | |
345 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
346 | { |
347 | /* A thread was created. */ | |
7aabaf9d | 348 | darwin_thread_info *pti = new darwin_thread_info; |
a80b95ba | 349 | |
bb00b29d TG |
350 | pti->gdb_port = new_id; |
351 | pti->msg_state = DARWIN_RUNNING; | |
352 | ||
db665f42 | 353 | /* Add the new thread. */ |
d0ffdf64 TT |
354 | add_thread_with_info (this, ptid_t (inf->pid, 0, new_id), |
355 | private_thread_info_up (pti)); | |
089354bb | 356 | new_thread_vec.push_back (pti); |
a80b95ba TG |
357 | new_ix++; |
358 | continue; | |
359 | } | |
bb00b29d | 360 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
361 | { |
362 | /* A thread was removed. */ | |
b7a08269 | 363 | struct thread_info *thr |
9213a6d7 | 364 | = this->find_thread (ptid_t (inf->pid, 0, old_id)); |
b7a08269 | 365 | delete_thread (thr); |
a80b95ba TG |
366 | kret = mach_port_deallocate (gdb_task, old_id); |
367 | MACH_CHECK_ERROR (kret); | |
368 | old_ix++; | |
bb00b29d | 369 | continue; |
a80b95ba | 370 | } |
f3574227 | 371 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
372 | } |
373 | ||
089354bb | 374 | darwin_inf->threads = std::move (new_thread_vec); |
a80b95ba | 375 | |
15a9128a | 376 | /* Deallocate the buffer. */ |
a80b95ba TG |
377 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
378 | new_nbr * sizeof (int)); | |
379 | MACH_CHECK_ERROR (kret); | |
380 | } | |
381 | ||
bb00b29d TG |
382 | /* Return an inferior by task port. */ |
383 | static struct inferior * | |
384 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 385 | { |
740480b8 TT |
386 | for (inferior *inf : all_inferiors ()) |
387 | { | |
388 | darwin_inferior *priv = get_darwin_inferior (inf); | |
389 | ||
390 | if (priv != nullptr && priv->task == port) | |
391 | return inf; | |
392 | } | |
393 | return nullptr; | |
bb00b29d | 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 | { |
740480b8 TT |
400 | for (inferior *inf : all_inferiors ()) |
401 | { | |
402 | if (inf->pid == pid) | |
403 | return inf; | |
404 | } | |
405 | return nullptr; | |
bb00b29d | 406 | } |
a80b95ba | 407 | |
bb00b29d TG |
408 | /* Return a thread by port. */ |
409 | static darwin_thread_t * | |
410 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
411 | { | |
089354bb SM |
412 | darwin_inferior *priv = get_darwin_inferior (inf); |
413 | ||
b5bddbbb TT |
414 | if (priv != nullptr) |
415 | for (darwin_thread_t *t : priv->threads) | |
416 | { | |
417 | if (t->gdb_port == thread) | |
418 | return t; | |
419 | } | |
bb00b29d | 420 | |
bb00b29d TG |
421 | return NULL; |
422 | } | |
a80b95ba | 423 | |
bb00b29d | 424 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 425 | |
bb00b29d TG |
426 | static void |
427 | darwin_suspend_inferior (struct inferior *inf) | |
428 | { | |
089354bb SM |
429 | darwin_inferior *priv = get_darwin_inferior (inf); |
430 | ||
b5bddbbb | 431 | if (priv != nullptr && !priv->suspended) |
a80b95ba | 432 | { |
bb00b29d | 433 | kern_return_t kret; |
a80b95ba | 434 | |
089354bb | 435 | kret = task_suspend (priv->task); |
bb00b29d | 436 | MACH_CHECK_ERROR (kret); |
a80b95ba | 437 | |
089354bb | 438 | priv->suspended = 1; |
bb00b29d TG |
439 | } |
440 | } | |
a80b95ba | 441 | |
bb00b29d | 442 | /* Resume an inferior at Mach level. */ |
a80b95ba | 443 | |
bb00b29d TG |
444 | static void |
445 | darwin_resume_inferior (struct inferior *inf) | |
446 | { | |
089354bb SM |
447 | darwin_inferior *priv = get_darwin_inferior (inf); |
448 | ||
b5bddbbb | 449 | if (priv != nullptr && priv->suspended) |
bb00b29d TG |
450 | { |
451 | kern_return_t kret; | |
a80b95ba | 452 | |
089354bb | 453 | kret = task_resume (priv->task); |
bb00b29d TG |
454 | MACH_CHECK_ERROR (kret); |
455 | ||
089354bb | 456 | priv->suspended = 0; |
a80b95ba TG |
457 | } |
458 | } | |
459 | ||
bb00b29d TG |
460 | static void |
461 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
462 | { | |
6cb06a8c TT |
463 | gdb_printf (gdb_stdlog, |
464 | _("message header:\n")); | |
465 | gdb_printf (gdb_stdlog, | |
466 | _(" bits: 0x%x\n"), hdr->msgh_bits); | |
467 | gdb_printf (gdb_stdlog, | |
468 | _(" size: 0x%x\n"), hdr->msgh_size); | |
469 | gdb_printf (gdb_stdlog, | |
470 | _(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
471 | gdb_printf (gdb_stdlog, | |
472 | _(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
473 | gdb_printf (gdb_stdlog, | |
474 | _(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
475 | gdb_printf (gdb_stdlog, | |
476 | _(" id: 0x%x\n"), hdr->msgh_id); | |
bb00b29d TG |
477 | |
478 | if (disp_body) | |
479 | { | |
480 | const unsigned char *data; | |
a6290449 | 481 | const unsigned int *ldata; |
bb00b29d TG |
482 | int size; |
483 | int i; | |
484 | ||
485 | data = (unsigned char *)(hdr + 1); | |
486 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
487 | ||
488 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
489 | { | |
490 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
491 | mach_msg_port_descriptor_t *desc = | |
492 | (mach_msg_port_descriptor_t *)(bod + 1); | |
493 | int k; | |
494 | NDR_record_t *ndr; | |
6cb06a8c TT |
495 | gdb_printf (gdb_stdlog, |
496 | _("body: descriptor_count=%u\n"), | |
497 | bod->msgh_descriptor_count); | |
bb00b29d TG |
498 | data += sizeof (mach_msg_body_t); |
499 | size -= sizeof (mach_msg_body_t); | |
500 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
501 | switch (desc[k].type) | |
502 | { | |
503 | case MACH_MSG_PORT_DESCRIPTOR: | |
6cb06a8c | 504 | gdb_printf |
a42a7433 TT |
505 | (gdb_stdlog, |
506 | _(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
bb00b29d TG |
507 | k, desc[k].type, desc[k].name, desc[k].disposition); |
508 | break; | |
509 | default: | |
6cb06a8c TT |
510 | gdb_printf (gdb_stdlog, |
511 | _(" descr %d: type=%u\n"), | |
512 | k, desc[k].type); | |
bb00b29d TG |
513 | break; |
514 | } | |
515 | data += bod->msgh_descriptor_count | |
516 | * sizeof (mach_msg_port_descriptor_t); | |
517 | size -= bod->msgh_descriptor_count | |
518 | * sizeof (mach_msg_port_descriptor_t); | |
519 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
6cb06a8c | 520 | gdb_printf |
a42a7433 TT |
521 | (gdb_stdlog, |
522 | _("NDR: mig=%02x if=%02x encod=%02x " | |
bb00b29d TG |
523 | "int=%02x char=%02x float=%02x\n"), |
524 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
525 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
526 | data += sizeof (NDR_record_t); | |
527 | size -= sizeof (NDR_record_t); | |
528 | } | |
529 | ||
6cb06a8c | 530 | gdb_printf (gdb_stdlog, _(" data:")); |
a6290449 TG |
531 | ldata = (const unsigned int *)data; |
532 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
6cb06a8c TT |
533 | gdb_printf (gdb_stdlog, " %08x", ldata[i]); |
534 | gdb_printf (gdb_stdlog, _("\n")); | |
bb00b29d TG |
535 | } |
536 | } | |
537 | ||
82b19a4d TG |
538 | /* Adjust inferior data when a new task was created. */ |
539 | ||
540 | static struct inferior * | |
541 | darwin_find_new_inferior (task_t task_port, thread_t thread_port) | |
542 | { | |
543 | int task_pid; | |
544 | struct inferior *inf; | |
545 | kern_return_t kret; | |
546 | mach_port_t prev; | |
547 | ||
548 | /* Find the corresponding pid. */ | |
549 | kret = pid_for_task (task_port, &task_pid); | |
550 | if (kret != KERN_SUCCESS) | |
551 | { | |
552 | MACH_CHECK_ERROR (kret); | |
553 | return NULL; | |
554 | } | |
555 | ||
556 | /* Find the inferior for this pid. */ | |
557 | inf = darwin_find_inferior_by_pid (task_pid); | |
558 | if (inf == NULL) | |
559 | return NULL; | |
560 | ||
089354bb SM |
561 | darwin_inferior *priv = get_darwin_inferior (inf); |
562 | ||
82b19a4d | 563 | /* Deallocate saved exception ports. */ |
089354bb | 564 | darwin_deallocate_exception_ports (priv); |
82b19a4d TG |
565 | |
566 | /* No need to remove dead_name notification, but still... */ | |
089354bb | 567 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d TG |
568 | MACH_NOTIFY_DEAD_NAME, 0, |
569 | MACH_PORT_NULL, | |
570 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
571 | &prev); | |
572 | if (kret != KERN_INVALID_ARGUMENT) | |
573 | MACH_CHECK_ERROR (kret); | |
574 | ||
575 | /* Replace old task port. */ | |
089354bb | 576 | kret = mach_port_deallocate (gdb_task, priv->task); |
82b19a4d | 577 | MACH_CHECK_ERROR (kret); |
089354bb | 578 | priv->task = task_port; |
82b19a4d TG |
579 | |
580 | darwin_setup_request_notification (inf); | |
581 | darwin_setup_exceptions (inf); | |
582 | ||
583 | return inf; | |
584 | } | |
585 | ||
586 | /* Check data representation. */ | |
587 | ||
588 | static int | |
589 | darwin_check_message_ndr (NDR_record_t *ndr) | |
590 | { | |
591 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
592 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
593 | || ndr->mig_encoding != NDR_record.mig_encoding | |
594 | || ndr->int_rep != NDR_record.int_rep | |
595 | || ndr->char_rep != NDR_record.char_rep | |
596 | || ndr->float_rep != NDR_record.float_rep) | |
597 | return -1; | |
598 | return 0; | |
599 | } | |
600 | ||
601 | /* Decode an exception message. */ | |
602 | ||
e7eee665 SM |
603 | int |
604 | darwin_nat_target::decode_exception_message (mach_msg_header_t *hdr, | |
605 | inferior **pinf, | |
606 | darwin_thread_t **pthread) | |
a80b95ba | 607 | { |
bb00b29d TG |
608 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
609 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
610 | NDR_record_t *ndr; | |
611 | integer_t *data; | |
612 | struct inferior *inf; | |
613 | darwin_thread_t *thread; | |
614 | task_t task_port; | |
615 | thread_t thread_port; | |
a80b95ba | 616 | kern_return_t kret; |
bb00b29d | 617 | int i; |
a80b95ba | 618 | |
a41f2563 TG |
619 | /* Check message destination. */ |
620 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
621 | return -1; |
622 | ||
623 | /* Check message header. */ | |
624 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
625 | return -1; | |
626 | ||
627 | /* Check descriptors. */ | |
628 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
629 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
630 | || bod->msgh_descriptor_count != 2 | |
631 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
632 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
633 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
634 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
635 | return -1; | |
636 | ||
637 | /* Check data representation. */ | |
638 | ndr = (NDR_record_t *)(desc + 2); | |
82b19a4d | 639 | if (darwin_check_message_ndr (ndr) != 0) |
bb00b29d TG |
640 | return -1; |
641 | ||
642 | /* Ok, the hard work. */ | |
643 | data = (integer_t *)(ndr + 1); | |
644 | ||
bb00b29d TG |
645 | task_port = desc[1].name; |
646 | thread_port = desc[0].name; | |
a41f2563 | 647 | |
a41f2563 | 648 | /* Find process by port. */ |
bb00b29d | 649 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 650 | *pinf = inf; |
82b19a4d TG |
651 | |
652 | if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2 | |
653 | && data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP) | |
654 | { | |
655 | /* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0, | |
656 | as a new Mach task is created when a process exec. */ | |
657 | inf = darwin_find_new_inferior (task_port, thread_port); | |
658 | *pinf = inf; | |
659 | ||
660 | if (inf == NULL) | |
661 | { | |
662 | /* Deallocate task_port, unless it was saved. */ | |
663 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
664 | MACH_CHECK_ERROR (kret); | |
665 | } | |
666 | } | |
667 | else | |
668 | { | |
669 | /* We got new rights to the task, get rid of it. Do not get rid of | |
670 | thread right, as we will need it to find the thread. */ | |
671 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
672 | MACH_CHECK_ERROR (kret); | |
673 | } | |
674 | ||
a41f2563 TG |
675 | if (inf == NULL) |
676 | { | |
677 | /* Not a known inferior. This could happen if the child fork, as | |
678 | the created process will inherit its exception port. | |
679 | FIXME: should the exception port be restored ? */ | |
a41f2563 TG |
680 | mig_reply_error_t reply; |
681 | ||
82b19a4d TG |
682 | inferior_debug |
683 | (4, _("darwin_decode_exception_message: unknown task 0x%x\n"), | |
684 | task_port); | |
685 | ||
15a9128a TG |
686 | /* Free thread port (we don't know it). */ |
687 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
688 | MACH_CHECK_ERROR (kret); | |
689 | ||
a41f2563 TG |
690 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); |
691 | ||
692 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
693 | reply.Head.msgh_size, 0, | |
694 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
695 | MACH_PORT_NULL); | |
696 | MACH_CHECK_ERROR (kret); | |
697 | ||
698 | return 0; | |
699 | } | |
bb00b29d TG |
700 | |
701 | /* Find thread by port. */ | |
702 | /* Check for new threads. Do it early so that the port in the exception | |
703 | message can be deallocated. */ | |
e7eee665 | 704 | check_new_threads (inf); |
bb00b29d | 705 | |
15a9128a TG |
706 | /* Free the thread port (as gdb knows the thread, it has already has a right |
707 | for it, so this just decrement a reference counter). */ | |
708 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
709 | MACH_CHECK_ERROR (kret); | |
710 | ||
bb00b29d TG |
711 | thread = darwin_find_thread (inf, thread_port); |
712 | if (thread == NULL) | |
713 | return -1; | |
714 | *pthread = thread; | |
715 | ||
a6290449 TG |
716 | /* The thread should be running. However we have observed cases where a |
717 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
718 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
719 | ||
bb00b29d | 720 | /* Finish decoding. */ |
bb00b29d TG |
721 | thread->event.header = *hdr; |
722 | thread->event.thread_port = thread_port; | |
723 | thread->event.task_port = task_port; | |
724 | thread->event.ex_type = data[0]; | |
725 | thread->event.data_count = data[1]; | |
726 | ||
727 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
728 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
729 | + data[1] * sizeof (integer_t))) | |
730 | return -1; | |
731 | for (i = 0; i < data[1]; i++) | |
732 | thread->event.ex_data[i] = data[2 + i]; | |
733 | ||
734 | thread->msg_state = DARWIN_MESSAGE; | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
82b19a4d TG |
739 | /* Decode dead_name notify message. */ |
740 | ||
741 | static int | |
742 | darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf) | |
743 | { | |
744 | NDR_record_t *ndr = (NDR_record_t *)(hdr + 1); | |
745 | integer_t *data = (integer_t *)(ndr + 1); | |
746 | struct inferior *inf; | |
82b19a4d | 747 | task_t task_port; |
82b19a4d TG |
748 | |
749 | /* Check message header. */ | |
750 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
751 | return -1; | |
752 | ||
753 | /* Check descriptors. */ | |
754 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t))) | |
755 | return -2; | |
756 | ||
757 | /* Check data representation. */ | |
758 | if (darwin_check_message_ndr (ndr) != 0) | |
759 | return -3; | |
760 | ||
761 | task_port = data[0]; | |
762 | ||
763 | /* Find process by port. */ | |
764 | inf = darwin_find_inferior_by_task (task_port); | |
765 | *pinf = inf; | |
766 | ||
767 | /* Check message destination. */ | |
b5bddbbb TT |
768 | if (inf != NULL) |
769 | { | |
770 | darwin_inferior *priv = get_darwin_inferior (inf); | |
771 | if (hdr->msgh_local_port != priv->notify_port) | |
772 | return -4; | |
773 | } | |
82b19a4d TG |
774 | |
775 | return 0; | |
776 | } | |
777 | ||
bb00b29d TG |
778 | static void |
779 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
780 | integer_t code) | |
781 | { | |
782 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
783 | |
784 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 785 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 786 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
787 | rh->msgh_local_port = MACH_PORT_NULL; |
788 | rh->msgh_id = hdr->msgh_id + 100; | |
789 | ||
790 | reply->NDR = NDR_record; | |
791 | reply->RetCode = code; | |
a80b95ba TG |
792 | } |
793 | ||
bb00b29d TG |
794 | static void |
795 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
796 | { |
797 | kern_return_t kret; | |
bb00b29d | 798 | mig_reply_error_t reply; |
089354bb | 799 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 800 | |
bb00b29d TG |
801 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
802 | ||
803 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
804 | reply.Head.msgh_size, 0, | |
805 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
806 | MACH_PORT_NULL); | |
a80b95ba TG |
807 | MACH_CHECK_ERROR (kret); |
808 | ||
089354bb | 809 | priv->pending_messages--; |
bb00b29d TG |
810 | } |
811 | ||
6821842f SM |
812 | /* Wrapper around the __pthread_kill syscall. We use this instead of the |
813 | pthread_kill function to be able to send a signal to any kind of thread, | |
814 | including GCD threads. */ | |
815 | ||
816 | static int | |
817 | darwin_pthread_kill (darwin_thread_t *thread, int nsignal) | |
818 | { | |
819 | DIAGNOSTIC_PUSH; | |
820 | DIAGNOSTIC_IGNORE_DEPRECATED_DECLARATIONS; | |
821 | int res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
822 | DIAGNOSTIC_POP; | |
823 | return res; | |
824 | } | |
825 | ||
bb00b29d TG |
826 | static void |
827 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
828 | int step, int nsignal) | |
829 | { | |
a80b95ba | 830 | inferior_debug |
bb00b29d TG |
831 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
832 | thread->msg_state, thread->gdb_port, step, nsignal); | |
833 | ||
834 | switch (thread->msg_state) | |
a80b95ba | 835 | { |
bb00b29d TG |
836 | case DARWIN_MESSAGE: |
837 | if (thread->event.ex_type == EXC_SOFTWARE | |
838 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
839 | { | |
840 | /* Either deliver a new signal or cancel the signal received. */ | |
6821842f SM |
841 | int res = PTRACE (PT_THUPDATE, inf->pid, |
842 | (caddr_t) (uintptr_t) thread->gdb_port, nsignal); | |
bb00b29d TG |
843 | if (res < 0) |
844 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
845 | } | |
846 | else if (nsignal) | |
847 | { | |
848 | /* Note: ptrace is allowed only if the process is stopped. | |
849 | Directly send the signal to the thread. */ | |
6821842f | 850 | int res = darwin_pthread_kill (thread, nsignal); |
bb00b29d TG |
851 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), |
852 | thread->gdb_port, nsignal, res); | |
853 | thread->signaled = 1; | |
854 | } | |
855 | ||
d987a266 | 856 | /* Set or reset single step. */ |
aa14fb50 TG |
857 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
858 | thread->gdb_port, step); | |
859 | darwin_set_sstep (thread->gdb_port, step); | |
860 | thread->single_step = step; | |
bb00b29d TG |
861 | |
862 | darwin_send_reply (inf, thread); | |
863 | thread->msg_state = DARWIN_RUNNING; | |
864 | break; | |
865 | ||
866 | case DARWIN_RUNNING: | |
867 | break; | |
868 | ||
869 | case DARWIN_STOPPED: | |
6821842f | 870 | kern_return_t kret = thread_resume (thread->gdb_port); |
bb00b29d TG |
871 | MACH_CHECK_ERROR (kret); |
872 | ||
873 | thread->msg_state = DARWIN_RUNNING; | |
874 | break; | |
a80b95ba | 875 | } |
bb00b29d | 876 | } |
a80b95ba | 877 | |
bb00b29d | 878 | /* Resume all threads of the inferior. */ |
a80b95ba | 879 | |
bb00b29d TG |
880 | static void |
881 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
882 | { | |
089354bb | 883 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 884 | |
b5bddbbb TT |
885 | if (priv != nullptr) |
886 | for (darwin_thread_t *thread : priv->threads) | |
887 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
888 | } |
889 | ||
bb00b29d TG |
890 | /* Suspend all threads of INF. */ |
891 | ||
892 | static void | |
893 | darwin_suspend_inferior_threads (struct inferior *inf) | |
894 | { | |
089354bb | 895 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 896 | |
089354bb SM |
897 | for (darwin_thread_t *thread : priv->threads) |
898 | { | |
899 | switch (thread->msg_state) | |
900 | { | |
901 | case DARWIN_STOPPED: | |
902 | case DARWIN_MESSAGE: | |
903 | break; | |
904 | case DARWIN_RUNNING: | |
905 | { | |
906 | kern_return_t kret = thread_suspend (thread->gdb_port); | |
907 | MACH_CHECK_ERROR (kret); | |
908 | thread->msg_state = DARWIN_STOPPED; | |
909 | break; | |
910 | } | |
911 | } | |
912 | } | |
bb00b29d | 913 | } |
a80b95ba | 914 | |
f6ac5f3d PA |
915 | void |
916 | darwin_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signal) | |
bb00b29d | 917 | { |
bb00b29d | 918 | int nsignal; |
a80b95ba | 919 | |
bb00b29d | 920 | inferior_debug |
8c121404 SM |
921 | (2, _("darwin_resume: ptid=%s, step=%d, signal=%d\n"), |
922 | ptid.to_string ().c_str (), step, signal); | |
bb00b29d | 923 | |
a493e3e2 | 924 | if (signal == GDB_SIGNAL_0) |
bb00b29d TG |
925 | nsignal = 0; |
926 | else | |
2ea28649 | 927 | nsignal = gdb_signal_to_host (signal); |
a80b95ba | 928 | |
bb00b29d TG |
929 | /* Don't try to single step all threads. */ |
930 | if (step) | |
931 | ptid = inferior_ptid; | |
932 | ||
933 | /* minus_one_ptid is RESUME_ALL. */ | |
d7e15655 | 934 | if (ptid == minus_one_ptid) |
a80b95ba | 935 | { |
bb00b29d | 936 | /* Resume threads. */ |
740480b8 TT |
937 | for (inferior *inf : all_inferiors ()) |
938 | darwin_resume_inferior_threads (inf, step, nsignal); | |
939 | ||
bb00b29d | 940 | /* Resume tasks. */ |
740480b8 TT |
941 | for (inferior *inf : all_inferiors ()) |
942 | darwin_resume_inferior (inf); | |
bb00b29d TG |
943 | } |
944 | else | |
a80b95ba | 945 | { |
e7eee665 | 946 | inferior *inf = find_inferior_ptid (this, ptid); |
cc6bcb54 | 947 | long tid = ptid.tid (); |
bb00b29d TG |
948 | |
949 | /* Stop the inferior (should be useless). */ | |
950 | darwin_suspend_inferior (inf); | |
951 | ||
952 | if (tid == 0) | |
dda83cd7 | 953 | darwin_resume_inferior_threads (inf, step, nsignal); |
bb00b29d | 954 | else |
dda83cd7 SM |
955 | { |
956 | darwin_thread_t *thread; | |
bb00b29d | 957 | |
dda83cd7 SM |
958 | /* Suspend threads of the task. */ |
959 | darwin_suspend_inferior_threads (inf); | |
bb00b29d | 960 | |
dda83cd7 SM |
961 | /* Resume the selected thread. */ |
962 | thread = darwin_find_thread (inf, tid); | |
963 | gdb_assert (thread); | |
964 | darwin_resume_thread (inf, thread, step, nsignal); | |
965 | } | |
bb00b29d TG |
966 | |
967 | /* Resume the task. */ | |
968 | darwin_resume_inferior (inf); | |
a80b95ba | 969 | } |
bb00b29d | 970 | } |
a80b95ba | 971 | |
e7eee665 SM |
972 | ptid_t |
973 | darwin_nat_target::decode_message (mach_msg_header_t *hdr, | |
974 | darwin_thread_t **pthread, | |
975 | inferior **pinf, | |
976 | target_waitstatus *status) | |
bb00b29d TG |
977 | { |
978 | darwin_thread_t *thread; | |
979 | struct inferior *inf; | |
a80b95ba | 980 | |
a41f2563 TG |
981 | /* Exception message. 2401 == 0x961 is exc. */ |
982 | if (hdr->msgh_id == 2401) | |
a80b95ba | 983 | { |
bb00b29d TG |
984 | int res; |
985 | ||
986 | /* Decode message. */ | |
e7eee665 | 987 | res = decode_exception_message (hdr, &inf, &thread); |
bb00b29d TG |
988 | |
989 | if (res < 0) | |
a80b95ba | 990 | { |
bb00b29d | 991 | /* Should not happen... */ |
a42a7433 TT |
992 | warning (_("darwin_wait: ill-formatted message (id=0x%x)\n"), |
993 | hdr->msgh_id); | |
bb00b29d | 994 | /* FIXME: send a failure reply? */ |
183be222 | 995 | status->set_ignore (); |
a41f2563 TG |
996 | return minus_one_ptid; |
997 | } | |
998 | if (inf == NULL) | |
999 | { | |
183be222 | 1000 | status->set_ignore (); |
a80b95ba TG |
1001 | return minus_one_ptid; |
1002 | } | |
bb00b29d TG |
1003 | *pinf = inf; |
1004 | *pthread = thread; | |
089354bb SM |
1005 | |
1006 | darwin_inferior *priv = get_darwin_inferior (inf); | |
1007 | ||
1008 | priv->pending_messages++; | |
a80b95ba | 1009 | |
bb00b29d TG |
1010 | thread->msg_state = DARWIN_MESSAGE; |
1011 | ||
c8c9911f | 1012 | inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"), |
bb00b29d TG |
1013 | thread->gdb_port, |
1014 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 1015 | |
bb00b29d | 1016 | switch (thread->event.ex_type) |
a80b95ba TG |
1017 | { |
1018 | case EXC_BAD_ACCESS: | |
183be222 | 1019 | status->set_stopped (GDB_EXC_BAD_ACCESS); |
a80b95ba TG |
1020 | break; |
1021 | case EXC_BAD_INSTRUCTION: | |
183be222 | 1022 | status->set_stopped (GDB_EXC_BAD_INSTRUCTION); |
a80b95ba TG |
1023 | break; |
1024 | case EXC_ARITHMETIC: | |
183be222 | 1025 | status->set_stopped (GDB_EXC_ARITHMETIC); |
a80b95ba TG |
1026 | break; |
1027 | case EXC_EMULATION: | |
183be222 | 1028 | status->set_stopped (GDB_EXC_EMULATION); |
a80b95ba TG |
1029 | break; |
1030 | case EXC_SOFTWARE: | |
bb00b29d | 1031 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 1032 | { |
183be222 SM |
1033 | status->set_stopped |
1034 | (gdb_signal_from_host (thread->event.ex_data[1])); | |
bb00b29d TG |
1035 | inferior_debug (5, _(" (signal %d: %s)\n"), |
1036 | thread->event.ex_data[1], | |
183be222 | 1037 | gdb_signal_to_name (status->sig ())); |
bb00b29d TG |
1038 | |
1039 | /* If the thread is stopped because it has received a signal | |
1040 | that gdb has just sent, continue. */ | |
1041 | if (thread->signaled) | |
1042 | { | |
1043 | thread->signaled = 0; | |
1044 | darwin_send_reply (inf, thread); | |
1045 | thread->msg_state = DARWIN_RUNNING; | |
183be222 | 1046 | status->set_ignore (); |
bb00b29d | 1047 | } |
a80b95ba TG |
1048 | } |
1049 | else | |
183be222 | 1050 | status->set_stopped (GDB_EXC_SOFTWARE); |
a80b95ba TG |
1051 | break; |
1052 | case EXC_BREAKPOINT: | |
1053 | /* Many internal GDB routines expect breakpoints to be reported | |
4e225075 | 1054 | as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT |
0963b4bd | 1055 | as a spurious signal. */ |
183be222 | 1056 | status->set_stopped (GDB_SIGNAL_TRAP); |
a80b95ba TG |
1057 | break; |
1058 | default: | |
183be222 | 1059 | status->set_stopped (GDB_SIGNAL_UNKNOWN); |
a80b95ba TG |
1060 | break; |
1061 | } | |
1062 | ||
fd79271b | 1063 | return ptid_t (inf->pid, 0, thread->gdb_port); |
bb00b29d | 1064 | } |
a41f2563 | 1065 | else if (hdr->msgh_id == 0x48) |
bb00b29d | 1066 | { |
7ff91701 | 1067 | /* MACH_NOTIFY_DEAD_NAME: notification for exit *or* WIFSTOPPED. */ |
82b19a4d TG |
1068 | int res; |
1069 | ||
1070 | res = darwin_decode_notify_message (hdr, &inf); | |
1071 | ||
1072 | if (res < 0) | |
1073 | { | |
1074 | /* Should not happen... */ | |
a42a7433 | 1075 | warning |
82b19a4d TG |
1076 | (_("darwin_wait: ill-formatted message (id=0x%x, res=%d)\n"), |
1077 | hdr->msgh_id, res); | |
1078 | } | |
1079 | ||
a41f2563 TG |
1080 | *pinf = NULL; |
1081 | *pthread = NULL; | |
bb00b29d | 1082 | |
82b19a4d TG |
1083 | if (res < 0 || inf == NULL) |
1084 | { | |
183be222 | 1085 | status->set_ignore (); |
82b19a4d TG |
1086 | return minus_one_ptid; |
1087 | } | |
1088 | ||
a41f2563 TG |
1089 | if (inf != NULL) |
1090 | { | |
089354bb SM |
1091 | darwin_inferior *priv = get_darwin_inferior (inf); |
1092 | ||
1093 | if (!priv->no_ptrace) | |
bb00b29d | 1094 | { |
86108c13 | 1095 | pid_t res_pid; |
a41f2563 TG |
1096 | int wstatus; |
1097 | ||
86108c13 TT |
1098 | res_pid = wait4 (inf->pid, &wstatus, 0, NULL); |
1099 | if (res_pid < 0 || res_pid != inf->pid) | |
a41f2563 | 1100 | { |
a42a7433 TT |
1101 | warning (_("wait4: res=%d: %s\n"), |
1102 | res_pid, safe_strerror (errno)); | |
183be222 | 1103 | status->set_ignore (); |
a41f2563 TG |
1104 | return minus_one_ptid; |
1105 | } | |
1106 | if (WIFEXITED (wstatus)) | |
7ff91701 DQ |
1107 | { |
1108 | status->set_exited (WEXITSTATUS (wstatus)); | |
287de656 | 1109 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"), |
7ff91701 DQ |
1110 | res_pid, wstatus); |
1111 | } | |
1112 | else if (WIFSTOPPED (wstatus)) | |
1113 | { | |
1114 | /* Ignore stopped state, it will be handled by the next | |
1115 | exception. */ | |
1116 | status->set_ignore (); | |
1117 | inferior_debug (4, _("darwin_wait: pid %d received WIFSTOPPED\n"), | |
1118 | res_pid); | |
1119 | return minus_one_ptid; | |
1120 | } | |
1121 | else if (WIFSIGNALED (wstatus)) | |
a41f2563 | 1122 | { |
183be222 SM |
1123 | status->set_signalled |
1124 | (gdb_signal_from_host (WTERMSIG (wstatus))); | |
7ff91701 DQ |
1125 | inferior_debug (4, _("darwin_wait: pid=%d received signal %d\n"), |
1126 | res_pid, status->sig()); | |
1127 | } | |
1128 | else | |
1129 | { | |
1130 | status->set_ignore (); | |
1131 | warning (_("Unexpected wait status after MACH_NOTIFY_DEAD_NAME " | |
287de656 | 1132 | "notification: 0x%x"), wstatus); |
7ff91701 | 1133 | return minus_one_ptid; |
a41f2563 | 1134 | } |
a41f2563 | 1135 | |
fe7d6a8d | 1136 | return ptid_t (inf->pid); |
bb00b29d TG |
1137 | } |
1138 | else | |
1139 | { | |
a41f2563 | 1140 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
183be222 | 1141 | status->set_exited (0 /* Don't know. */); |
fd79271b | 1142 | return ptid_t (inf->pid, 0, 0); |
bb00b29d | 1143 | } |
bb00b29d TG |
1144 | } |
1145 | } | |
1146 | ||
a41f2563 | 1147 | /* Unknown message. */ |
86ad98c3 | 1148 | warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id); |
183be222 | 1149 | status->set_ignore (); |
bb00b29d TG |
1150 | return minus_one_ptid; |
1151 | } | |
1152 | ||
e7eee665 | 1153 | int |
74387712 | 1154 | darwin_nat_target::cancel_breakpoint (inferior *inf, ptid_t ptid) |
bb00b29d | 1155 | { |
0963b4bd | 1156 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1157 | the current event, eventually we will resume this thread, and this |
1158 | breakpoint will trap again. | |
1159 | ||
1160 | If we do not do this, then we run the risk that the user will | |
1161 | delete or disable the breakpoint, but the thread will have already | |
1162 | tripped on it. */ | |
1163 | ||
e7eee665 | 1164 | struct regcache *regcache = get_thread_regcache (this, ptid); |
ac7936df | 1165 | struct gdbarch *gdbarch = regcache->arch (); |
bb00b29d | 1166 | CORE_ADDR pc; |
a80b95ba | 1167 | |
527a273a | 1168 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
0a324982 | 1169 | if (breakpoint_inserted_here_p (inf->aspace.get (), pc)) |
bb00b29d | 1170 | { |
3eb831e0 | 1171 | inferior_debug (4, "cancel_breakpoint for thread 0x%lx\n", |
cc6bcb54 | 1172 | (unsigned long) ptid.tid ()); |
bb00b29d TG |
1173 | |
1174 | /* Back up the PC if necessary. */ | |
527a273a | 1175 | if (gdbarch_decr_pc_after_break (gdbarch)) |
bb00b29d TG |
1176 | regcache_write_pc (regcache, pc); |
1177 | ||
1178 | return 1; | |
a80b95ba | 1179 | } |
bb00b29d TG |
1180 | return 0; |
1181 | } | |
1182 | ||
e7eee665 SM |
1183 | ptid_t |
1184 | darwin_nat_target::wait_1 (ptid_t ptid, struct target_waitstatus *status) | |
bb00b29d TG |
1185 | { |
1186 | kern_return_t kret; | |
1187 | union | |
1188 | { | |
1189 | mach_msg_header_t hdr; | |
1190 | char data[0x100]; | |
1191 | } msgin; | |
1192 | mach_msg_header_t *hdr = &msgin.hdr; | |
1193 | ptid_t res; | |
1194 | darwin_thread_t *thread; | |
bb00b29d TG |
1195 | |
1196 | inferior_debug | |
b5572c42 | 1197 | (2, _("darwin_wait: waiting for a message ptid=%s\n"), |
8c121404 | 1198 | ptid.to_string ().c_str ()); |
bb00b29d TG |
1199 | |
1200 | /* Handle fake stop events at first. */ | |
1201 | if (darwin_inf_fake_stop != NULL) | |
1202 | { | |
ab53f382 | 1203 | inferior *inf = darwin_inf_fake_stop; |
bb00b29d TG |
1204 | darwin_inf_fake_stop = NULL; |
1205 | ||
089354bb SM |
1206 | darwin_inferior *priv = get_darwin_inferior (inf); |
1207 | ||
183be222 | 1208 | status->set_stopped (GDB_SIGNAL_TRAP); |
089354bb | 1209 | thread = priv->threads[0]; |
bb00b29d | 1210 | thread->msg_state = DARWIN_STOPPED; |
fd79271b | 1211 | return ptid_t (inf->pid, 0, thread->gdb_port); |
bb00b29d TG |
1212 | } |
1213 | ||
1214 | do | |
1215 | { | |
1216 | /* set_sigint_trap (); */ | |
1217 | ||
1218 | /* Wait for a message. */ | |
1219 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1220 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1221 | ||
1222 | /* clear_sigint_trap (); */ | |
1223 | ||
1224 | if (kret == MACH_RCV_INTERRUPTED) | |
1225 | { | |
183be222 | 1226 | status->set_ignore (); |
bb00b29d TG |
1227 | return minus_one_ptid; |
1228 | } | |
1229 | ||
1230 | if (kret != MACH_MSG_SUCCESS) | |
1231 | { | |
c8c9911f | 1232 | inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret); |
183be222 | 1233 | status->set_spurious (); |
bb00b29d TG |
1234 | return minus_one_ptid; |
1235 | } | |
1236 | ||
1237 | /* Debug: display message. */ | |
1238 | if (darwin_debug_flag > 10) | |
1239 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1240 | ||
ab53f382 | 1241 | inferior *inf; |
e7eee665 | 1242 | res = decode_message (hdr, &thread, &inf, status); |
d7e15655 | 1243 | if (res == minus_one_ptid) |
a41f2563 | 1244 | continue; |
bb00b29d | 1245 | |
a41f2563 | 1246 | /* Early return in case an inferior has exited. */ |
bb00b29d TG |
1247 | if (inf == NULL) |
1248 | return res; | |
1249 | } | |
183be222 | 1250 | while (status->kind () == TARGET_WAITKIND_IGNORE); |
bb00b29d TG |
1251 | |
1252 | /* Stop all tasks. */ | |
e7eee665 SM |
1253 | for (inferior *inf : all_inferiors (this)) |
1254 | { | |
1255 | darwin_suspend_inferior (inf); | |
1256 | check_new_threads (inf); | |
1257 | } | |
bb00b29d TG |
1258 | |
1259 | /* Read pending messages. */ | |
1260 | while (1) | |
a80b95ba | 1261 | { |
bb00b29d TG |
1262 | struct target_waitstatus status2; |
1263 | ptid_t ptid2; | |
1264 | ||
1265 | kret = mach_msg (&msgin.hdr, | |
1266 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1267 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1268 | ||
1269 | if (kret == MACH_RCV_TIMED_OUT) | |
1270 | break; | |
1271 | if (kret != MACH_MSG_SUCCESS) | |
1272 | { | |
1273 | inferior_debug | |
c8c9911f | 1274 | (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret); |
bb00b29d TG |
1275 | break; |
1276 | } | |
1277 | ||
a41f2563 TG |
1278 | /* Debug: display message. */ |
1279 | if (darwin_debug_flag > 10) | |
1280 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1281 | ||
ab53f382 | 1282 | inferior *inf; |
e7eee665 | 1283 | ptid2 = decode_message (hdr, &thread, &inf, &status2); |
a80b95ba | 1284 | |
bb00b29d TG |
1285 | if (inf != NULL && thread != NULL |
1286 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1287 | { |
bb00b29d | 1288 | if (thread->single_step |
74387712 SM |
1289 | || cancel_breakpoint (inf, |
1290 | ptid_t (inf->pid, 0, thread->gdb_port))) | |
bb00b29d TG |
1291 | { |
1292 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1293 | darwin_send_reply (inf, thread); | |
1294 | thread->msg_state = DARWIN_RUNNING; | |
1295 | } | |
1296 | else | |
1297 | inferior_debug | |
c8c9911f | 1298 | (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"), |
bb00b29d | 1299 | thread->gdb_port); |
a80b95ba | 1300 | } |
bb00b29d TG |
1301 | else |
1302 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1303 | } | |
1304 | return res; | |
1305 | } | |
a80b95ba | 1306 | |
f6ac5f3d PA |
1307 | ptid_t |
1308 | darwin_nat_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
b60cea74 | 1309 | target_wait_flags options) |
bb00b29d | 1310 | { |
e7eee665 | 1311 | return wait_1 (ptid, status); |
bb00b29d | 1312 | } |
a80b95ba | 1313 | |
f6ac5f3d PA |
1314 | void |
1315 | darwin_nat_target::interrupt () | |
bb00b29d TG |
1316 | { |
1317 | struct inferior *inf = current_inferior (); | |
089354bb | 1318 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1319 | |
bb00b29d | 1320 | /* FIXME: handle in no_ptrace mode. */ |
089354bb | 1321 | gdb_assert (!priv->no_ptrace); |
f6ac5f3d | 1322 | ::kill (inf->pid, SIGINT); |
a80b95ba TG |
1323 | } |
1324 | ||
82b19a4d TG |
1325 | /* Deallocate threads port and vector. */ |
1326 | ||
a80b95ba | 1327 | static void |
82b19a4d | 1328 | darwin_deallocate_threads (struct inferior *inf) |
a80b95ba | 1329 | { |
089354bb SM |
1330 | darwin_inferior *priv = get_darwin_inferior (inf); |
1331 | ||
1332 | for (darwin_thread_t *t : priv->threads) | |
a80b95ba | 1333 | { |
089354bb SM |
1334 | kern_return_t kret = mach_port_deallocate (gdb_task, t->gdb_port); |
1335 | MACH_CHECK_ERROR (kret); | |
a80b95ba | 1336 | } |
089354bb SM |
1337 | |
1338 | priv->threads.clear (); | |
82b19a4d | 1339 | } |
a80b95ba | 1340 | |
f6ac5f3d PA |
1341 | void |
1342 | darwin_nat_target::mourn_inferior () | |
82b19a4d TG |
1343 | { |
1344 | struct inferior *inf = current_inferior (); | |
089354bb | 1345 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1346 | kern_return_t kret; |
1347 | mach_port_t prev; | |
82b19a4d TG |
1348 | |
1349 | /* Deallocate threads. */ | |
1350 | darwin_deallocate_threads (inf); | |
1351 | ||
1352 | /* Remove notify_port from darwin_port_set. */ | |
bb00b29d | 1353 | kret = mach_port_move_member (gdb_task, |
089354bb | 1354 | priv->notify_port, MACH_PORT_NULL); |
fda184b6 | 1355 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1356 | |
82b19a4d | 1357 | /* Remove task port dead_name notification. */ |
089354bb | 1358 | kret = mach_port_request_notification (gdb_task, priv->task, |
a80b95ba | 1359 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1360 | MACH_PORT_NULL, |
a80b95ba TG |
1361 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1362 | &prev); | |
1363 | /* This can fail if the task is dead. */ | |
c8c9911f | 1364 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
089354bb | 1365 | priv->task, prev, priv->notify_port); |
bb00b29d | 1366 | |
a80b95ba TG |
1367 | if (kret == KERN_SUCCESS) |
1368 | { | |
1369 | kret = mach_port_deallocate (gdb_task, prev); | |
1370 | MACH_CHECK_ERROR (kret); | |
1371 | } | |
1372 | ||
82b19a4d | 1373 | /* Destroy notify_port. */ |
089354bb | 1374 | kret = mach_port_destroy (gdb_task, priv->notify_port); |
bb00b29d TG |
1375 | MACH_CHECK_ERROR (kret); |
1376 | ||
a80b95ba | 1377 | /* Deallocate saved exception ports. */ |
089354bb | 1378 | darwin_deallocate_exception_ports (priv); |
a80b95ba | 1379 | |
82b19a4d | 1380 | /* Deallocate task port. */ |
089354bb | 1381 | kret = mach_port_deallocate (gdb_task, priv->task); |
a80b95ba TG |
1382 | MACH_CHECK_ERROR (kret); |
1383 | ||
fe978cb0 | 1384 | inf->priv = NULL; |
a80b95ba | 1385 | |
f6ac5f3d | 1386 | inf_child_target::mourn_inferior (); |
a80b95ba TG |
1387 | } |
1388 | ||
1389 | static void | |
bb00b29d | 1390 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1391 | { |
089354bb | 1392 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1393 | |
089354bb | 1394 | for (darwin_thread_t *t : priv->threads) |
bb00b29d TG |
1395 | { |
1396 | if (t->msg_state == DARWIN_MESSAGE) | |
1397 | darwin_resume_thread (inf, t, 0, 0); | |
1398 | } | |
a80b95ba TG |
1399 | } |
1400 | ||
e7eee665 SM |
1401 | void |
1402 | darwin_nat_target::stop_inferior (inferior *inf) | |
a80b95ba TG |
1403 | { |
1404 | struct target_waitstatus wstatus; | |
1405 | ptid_t ptid; | |
a80b95ba | 1406 | int res; |
089354bb | 1407 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1408 | |
bb00b29d | 1409 | gdb_assert (inf != NULL); |
a80b95ba | 1410 | |
bb00b29d | 1411 | darwin_suspend_inferior (inf); |
a80b95ba | 1412 | |
bb00b29d | 1413 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1414 | |
089354bb | 1415 | if (priv->no_ptrace) |
bb00b29d | 1416 | return; |
a80b95ba | 1417 | |
e7eee665 | 1418 | res = ::kill (inf->pid, SIGSTOP); |
bb00b29d | 1419 | if (res != 0) |
b37520b6 | 1420 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1421 | |
bb00b29d TG |
1422 | /* Wait until the process is really stopped. */ |
1423 | while (1) | |
a80b95ba | 1424 | { |
fe7d6a8d | 1425 | ptid = wait_1 (ptid_t (inf->pid), &wstatus); |
183be222 SM |
1426 | if (wstatus.kind () == TARGET_WAITKIND_STOPPED |
1427 | && wstatus.sig () == GDB_SIGNAL_STOP) | |
bb00b29d | 1428 | break; |
a80b95ba TG |
1429 | } |
1430 | } | |
1431 | ||
1432 | static kern_return_t | |
1433 | darwin_save_exception_ports (darwin_inferior *inf) | |
1434 | { | |
1435 | kern_return_t kret; | |
1436 | ||
1437 | inf->exception_info.count = | |
1438 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1439 | ||
1440 | kret = task_get_exception_ports | |
1441 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1442 | &inf->exception_info.count, inf->exception_info.ports, | |
1443 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1444 | return kret; | |
1445 | } | |
1446 | ||
1447 | static kern_return_t | |
1448 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1449 | { | |
1450 | int i; | |
1451 | kern_return_t kret; | |
1452 | ||
1453 | for (i = 0; i < inf->exception_info.count; i++) | |
1454 | { | |
1455 | kret = task_set_exception_ports | |
dda83cd7 | 1456 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], |
a80b95ba TG |
1457 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); |
1458 | if (kret != KERN_SUCCESS) | |
dda83cd7 | 1459 | return kret; |
a80b95ba TG |
1460 | } |
1461 | ||
1462 | return KERN_SUCCESS; | |
1463 | } | |
1464 | ||
82b19a4d TG |
1465 | /* Deallocate saved exception ports. */ |
1466 | ||
1467 | static void | |
1468 | darwin_deallocate_exception_ports (darwin_inferior *inf) | |
1469 | { | |
1470 | int i; | |
1471 | kern_return_t kret; | |
1472 | ||
1473 | for (i = 0; i < inf->exception_info.count; i++) | |
1474 | { | |
1475 | kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]); | |
1476 | MACH_CHECK_ERROR (kret); | |
1477 | } | |
1478 | inf->exception_info.count = 0; | |
1479 | } | |
1480 | ||
1481 | static void | |
1482 | darwin_setup_exceptions (struct inferior *inf) | |
1483 | { | |
089354bb | 1484 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d | 1485 | kern_return_t kret; |
82b19a4d TG |
1486 | exception_mask_t mask; |
1487 | ||
089354bb | 1488 | kret = darwin_save_exception_ports (priv); |
82b19a4d TG |
1489 | if (kret != KERN_SUCCESS) |
1490 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1491 | "returned: %d"), | |
1492 | kret); | |
1493 | ||
1494 | /* Set exception port. */ | |
1495 | if (enable_mach_exceptions) | |
1496 | mask = EXC_MASK_ALL; | |
1497 | else | |
1498 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
089354bb | 1499 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
82b19a4d TG |
1500 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
1501 | if (kret != KERN_SUCCESS) | |
1502 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1503 | "returned: %d"), | |
1504 | kret); | |
1505 | } | |
1506 | ||
f6ac5f3d PA |
1507 | void |
1508 | darwin_nat_target::kill () | |
bb00b29d TG |
1509 | { |
1510 | struct inferior *inf = current_inferior (); | |
089354bb | 1511 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
1512 | struct target_waitstatus wstatus; |
1513 | ptid_t ptid; | |
1514 | kern_return_t kret; | |
bb00b29d TG |
1515 | int res; |
1516 | ||
d7e15655 | 1517 | if (inferior_ptid == null_ptid) |
bb00b29d TG |
1518 | return; |
1519 | ||
1520 | gdb_assert (inf != NULL); | |
1521 | ||
089354bb | 1522 | kret = darwin_restore_exception_ports (priv); |
ee41036f | 1523 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1524 | |
ee41036f | 1525 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1526 | |
f6ac5f3d | 1527 | res = ::kill (inf->pid, 9); |
bb00b29d | 1528 | |
ee41036f | 1529 | if (res == 0) |
bb00b29d | 1530 | { |
15843549 | 1531 | /* On MacOS version Sierra, the darwin_restore_exception_ports call |
dda83cd7 SM |
1532 | does not work as expected. |
1533 | When the kill function is called, the SIGKILL signal is received | |
1534 | by gdb whereas it should have been received by the kernel since | |
1535 | the exception ports have been restored. | |
1536 | This behavior is not the expected one thus gdb does not reply to | |
1537 | the received SIGKILL message. This situation leads to a "busy" | |
1538 | resource from the kernel point of view and the inferior is never | |
1539 | released, causing it to remain as a zombie process, even after | |
15843549 | 1540 | GDB exits. |
dda83cd7 SM |
1541 | To work around this, we mark all the threads of the inferior as |
1542 | signaled thus darwin_decode_message function knows that the kill | |
1543 | signal was sent by gdb and will take the appropriate action | |
1544 | (cancel signal and reply to the signal message). */ | |
15843549 | 1545 | for (darwin_thread_t *thread : priv->threads) |
dda83cd7 | 1546 | thread->signaled = 1; |
15843549 | 1547 | |
bb00b29d | 1548 | darwin_resume_inferior (inf); |
a6290449 | 1549 | |
fe7d6a8d | 1550 | ptid = wait_1 (ptid_t (inf->pid), &wstatus); |
bb00b29d | 1551 | } |
ee41036f TG |
1552 | else if (errno != ESRCH) |
1553 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1554 | inf->pid, safe_strerror (errno)); | |
bb00b29d | 1555 | |
fe7d6a8d | 1556 | target_mourn_inferior (ptid_t (inf->pid)); |
bb00b29d TG |
1557 | } |
1558 | ||
82b19a4d TG |
1559 | static void |
1560 | darwin_setup_request_notification (struct inferior *inf) | |
1561 | { | |
089354bb | 1562 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1563 | kern_return_t kret; |
1564 | mach_port_t prev_not; | |
1565 | ||
089354bb | 1566 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d | 1567 | MACH_NOTIFY_DEAD_NAME, 0, |
089354bb | 1568 | priv->notify_port, |
82b19a4d TG |
1569 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1570 | &prev_not); | |
1571 | if (kret != KERN_SUCCESS) | |
1572 | error (_("Termination notification request failed, " | |
1573 | "mach_port_request_notification\n" | |
1574 | "returned: %d"), | |
1575 | kret); | |
1576 | if (prev_not != MACH_PORT_NULL) | |
1577 | { | |
1578 | /* This is unexpected, as there should not be any previously | |
1579 | registered notification request. But this is not a fatal | |
1580 | issue, so just emit a warning. */ | |
1581 | warning (_("\ | |
1582 | A task termination request was registered before the debugger registered\n\ | |
1583 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1584 | impact on the debugging session.")); | |
1585 | } | |
1586 | } | |
1587 | ||
bb00b29d TG |
1588 | static void |
1589 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1590 | { |
a80b95ba | 1591 | kern_return_t kret; |
a80b95ba | 1592 | |
089354bb SM |
1593 | darwin_inferior *priv = new darwin_inferior; |
1594 | inf->priv.reset (priv); | |
bb00b29d | 1595 | |
a70b8144 | 1596 | try |
a80b95ba | 1597 | { |
a50c11c6 TT |
1598 | kret = task_for_pid (gdb_task, inf->pid, &priv->task); |
1599 | if (kret != KERN_SUCCESS) | |
a80b95ba | 1600 | { |
a50c11c6 | 1601 | int status; |
a80b95ba | 1602 | |
a50c11c6 TT |
1603 | if (!inf->attach_flag) |
1604 | { | |
1605 | kill (inf->pid, 9); | |
1606 | waitpid (inf->pid, &status, 0); | |
1607 | } | |
a80b95ba | 1608 | |
a50c11c6 TT |
1609 | error |
1610 | (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
1611 | " (please check gdb is codesigned - see taskgated(8))"), | |
1612 | inf->pid, mach_error_string (kret), (unsigned long) kret); | |
1613 | } | |
a80b95ba | 1614 | |
a50c11c6 TT |
1615 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
1616 | priv->task, inf->pid); | |
a80b95ba | 1617 | |
a50c11c6 TT |
1618 | if (darwin_ex_port == MACH_PORT_NULL) |
1619 | { | |
1620 | /* Create a port to get exceptions. */ | |
1621 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1622 | &darwin_ex_port); | |
1623 | if (kret != KERN_SUCCESS) | |
1624 | error (_("Unable to create exception port, mach_port_allocate " | |
1625 | "returned: %d"), | |
1626 | kret); | |
1627 | ||
1628 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, | |
1629 | darwin_ex_port, | |
1630 | MACH_MSG_TYPE_MAKE_SEND); | |
1631 | if (kret != KERN_SUCCESS) | |
1632 | error (_("Unable to create exception port, mach_port_insert_right " | |
1633 | "returned: %d"), | |
1634 | kret); | |
1635 | ||
1636 | /* Create a port set and put ex_port in it. */ | |
1637 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1638 | &darwin_port_set); | |
1639 | if (kret != KERN_SUCCESS) | |
1640 | error (_("Unable to create port set, mach_port_allocate " | |
1641 | "returned: %d"), | |
1642 | kret); | |
1643 | ||
1644 | kret = mach_port_move_member (gdb_task, darwin_ex_port, | |
1645 | darwin_port_set); | |
1646 | if (kret != KERN_SUCCESS) | |
1647 | error (_("Unable to move exception port into new port set, " | |
1648 | "mach_port_move_member\n" | |
1649 | "returned: %d"), | |
1650 | kret); | |
1651 | } | |
a80b95ba | 1652 | |
a50c11c6 TT |
1653 | /* Create a port to be notified when the child task terminates. */ |
1654 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1655 | &priv->notify_port); | |
fda184b6 | 1656 | if (kret != KERN_SUCCESS) |
a50c11c6 | 1657 | error (_("Unable to create notification port, mach_port_allocate " |
fda184b6 JB |
1658 | "returned: %d"), |
1659 | kret); | |
a80b95ba | 1660 | |
a50c11c6 TT |
1661 | kret = mach_port_move_member (gdb_task, |
1662 | priv->notify_port, darwin_port_set); | |
fda184b6 | 1663 | if (kret != KERN_SUCCESS) |
a50c11c6 | 1664 | error (_("Unable to move notification port into new port set, " |
fda184b6 JB |
1665 | "mach_port_move_member\n" |
1666 | "returned: %d"), | |
1667 | kret); | |
a80b95ba | 1668 | |
a50c11c6 | 1669 | darwin_setup_request_notification (inf); |
a80b95ba | 1670 | |
a50c11c6 TT |
1671 | darwin_setup_exceptions (inf); |
1672 | } | |
230d2906 | 1673 | catch (const gdb_exception &ex) |
a50c11c6 | 1674 | { |
a7d0f0f0 | 1675 | exit_inferior (inf); |
fe7d6a8d | 1676 | switch_to_no_thread (); |
a80b95ba | 1677 | |
eedc3f4f | 1678 | throw; |
a50c11c6 | 1679 | } |
a80b95ba | 1680 | |
59f413d5 | 1681 | target_ops *darwin_ops = get_native_target (); |
c8fbd44a | 1682 | if (!inf->target_is_pushed (darwin_ops)) |
02980c56 | 1683 | inf->push_target (darwin_ops); |
a80b95ba TG |
1684 | } |
1685 | ||
7aabaf9d | 1686 | /* Get the thread_info object corresponding to this darwin_thread_info. */ |
db665f42 SM |
1687 | |
1688 | static struct thread_info * | |
7aabaf9d | 1689 | thread_info_from_private_thread_info (darwin_thread_info *pti) |
db665f42 | 1690 | { |
61c9c421 | 1691 | for (struct thread_info *it : all_threads ()) |
db665f42 | 1692 | { |
7aabaf9d SM |
1693 | darwin_thread_info *iter_pti = get_darwin_thread_info (it); |
1694 | ||
1695 | if (iter_pti->gdb_port == pti->gdb_port) | |
08036331 | 1696 | return it; |
db665f42 SM |
1697 | } |
1698 | ||
08036331 | 1699 | gdb_assert_not_reached ("did not find gdb thread for darwin thread"); |
db665f42 SM |
1700 | } |
1701 | ||
e7eee665 SM |
1702 | void |
1703 | darwin_nat_target::init_thread_list (inferior *inf) | |
a80b95ba | 1704 | { |
e7eee665 | 1705 | check_new_threads (inf); |
a80b95ba | 1706 | |
089354bb | 1707 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 1708 | |
089354bb SM |
1709 | gdb_assert (!priv->threads.empty ()); |
1710 | ||
7aabaf9d | 1711 | darwin_thread_info *first_pti = priv->threads.front (); |
db665f42 SM |
1712 | struct thread_info *first_thread |
1713 | = thread_info_from_private_thread_info (first_pti); | |
1714 | ||
fe7d6a8d | 1715 | switch_to_thread (first_thread); |
bb00b29d TG |
1716 | } |
1717 | ||
1718 | /* The child must synchronize with gdb: gdb must set the exception port | |
1719 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1720 | FIXME: is there a lighter way ? */ | |
1721 | static int ptrace_fds[2]; | |
1722 | ||
1723 | static void | |
1724 | darwin_ptrace_me (void) | |
1725 | { | |
1726 | int res; | |
1727 | char c; | |
1728 | ||
1729 | /* Close write end point. */ | |
0db8980c SDJ |
1730 | if (close (ptrace_fds[1]) < 0) |
1731 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1732 | |
1733 | /* Wait until gdb is ready. */ | |
1734 | res = read (ptrace_fds[0], &c, 1); | |
fda184b6 | 1735 | if (res != 0) |
0db8980c SDJ |
1736 | trace_start_error (_("unable to read from pipe, read returned: %d"), res); |
1737 | ||
1738 | if (close (ptrace_fds[0]) < 0) | |
1739 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1740 | |
1741 | /* Get rid of privileges. */ | |
0db8980c SDJ |
1742 | if (setegid (getgid ()) < 0) |
1743 | trace_start_error_with_name ("setegid"); | |
bb00b29d TG |
1744 | |
1745 | /* Set TRACEME. */ | |
0db8980c SDJ |
1746 | if (PTRACE (PT_TRACE_ME, 0, 0, 0) < 0) |
1747 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1748 | |
1749 | /* Redirect signals to exception port. */ | |
0db8980c SDJ |
1750 | if (PTRACE (PT_SIGEXC, 0, 0, 0) < 0) |
1751 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1752 | } |
1753 | ||
1754 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1755 | static void | |
1756 | darwin_pre_ptrace (void) | |
1757 | { | |
1758 | if (pipe (ptrace_fds) != 0) | |
1759 | { | |
1760 | ptrace_fds[0] = -1; | |
1761 | ptrace_fds[1] = -1; | |
1762 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1763 | } | |
21ff4686 TT |
1764 | |
1765 | mark_fd_no_cloexec (ptrace_fds[0]); | |
1766 | mark_fd_no_cloexec (ptrace_fds[1]); | |
a80b95ba TG |
1767 | } |
1768 | ||
e7eee665 SM |
1769 | void |
1770 | darwin_nat_target::ptrace_him (int pid) | |
a80b95ba | 1771 | { |
bb00b29d | 1772 | struct inferior *inf = current_inferior (); |
a80b95ba | 1773 | |
bb00b29d | 1774 | darwin_attach_pid (inf); |
a80b95ba TG |
1775 | |
1776 | /* Let's the child run. */ | |
e7eee665 SM |
1777 | ::close (ptrace_fds[0]); |
1778 | ::close (ptrace_fds[1]); | |
a80b95ba | 1779 | |
21ff4686 TT |
1780 | unmark_fd_no_cloexec (ptrace_fds[0]); |
1781 | unmark_fd_no_cloexec (ptrace_fds[1]); | |
1782 | ||
e7eee665 | 1783 | init_thread_list (inf); |
bb00b29d | 1784 | |
2090129c | 1785 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
a80b95ba TG |
1786 | } |
1787 | ||
e69860f1 TG |
1788 | static void |
1789 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1790 | { | |
1791 | posix_spawnattr_t attr; | |
1792 | short ps_flags = 0; | |
f00c55f8 | 1793 | int res; |
e69860f1 | 1794 | |
f00c55f8 TG |
1795 | res = posix_spawnattr_init (&attr); |
1796 | if (res != 0) | |
e69860f1 | 1797 | { |
6cb06a8c | 1798 | gdb_printf |
dda83cd7 | 1799 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); |
e69860f1 TG |
1800 | return; |
1801 | } | |
1802 | ||
1803 | /* Do like execve: replace the image. */ | |
1804 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1805 | ||
1806 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1807 | kernel include files. */ | |
1808 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1809 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1810 | #endif | |
1811 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1812 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1813 | if (res != 0) | |
e69860f1 | 1814 | { |
6cb06a8c | 1815 | gdb_printf (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1816 | return; |
1817 | } | |
1818 | ||
1819 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1820 | } | |
1821 | ||
b50a8b9a TT |
1822 | /* Read kernel version, and return TRUE if this host may have System |
1823 | Integrity Protection (Sierra or later). */ | |
d6be54ef XR |
1824 | |
1825 | static bool | |
b50a8b9a | 1826 | may_have_sip () |
d6be54ef XR |
1827 | { |
1828 | char str[16]; | |
1829 | size_t sz = sizeof (str); | |
1830 | int ret; | |
1831 | ||
1832 | ret = sysctlbyname ("kern.osrelease", str, &sz, NULL, 0); | |
1833 | if (ret == 0 && sz < sizeof (str)) | |
1834 | { | |
1835 | unsigned long ver = strtoul (str, NULL, 10); | |
1836 | if (ver >= 16) | |
dda83cd7 | 1837 | return true; |
d6be54ef XR |
1838 | } |
1839 | return false; | |
1840 | } | |
1841 | ||
b50a8b9a TT |
1842 | /* A helper for maybe_cache_shell. This copies the shell to the |
1843 | cache. It will throw an exception on any failure. */ | |
1844 | ||
1845 | static void | |
1846 | copy_shell_to_cache (const char *shell, const std::string &new_name) | |
1847 | { | |
13084383 | 1848 | scoped_fd from_fd = gdb_open_cloexec (shell, O_RDONLY, 0); |
b50a8b9a TT |
1849 | if (from_fd.get () < 0) |
1850 | error (_("Could not open shell (%s) for reading: %s"), | |
1851 | shell, safe_strerror (errno)); | |
1852 | ||
1853 | std::string new_dir = ldirname (new_name.c_str ()); | |
1854 | if (!mkdir_recursive (new_dir.c_str ())) | |
1855 | error (_("Could not make cache directory \"%s\": %s"), | |
1856 | new_dir.c_str (), safe_strerror (errno)); | |
1857 | ||
1858 | gdb::char_vector temp_name = make_temp_filename (new_name); | |
2fed9db4 | 1859 | scoped_fd to_fd = gdb_mkostemp_cloexec (&temp_name[0]); |
b50a8b9a TT |
1860 | gdb::unlinker unlink_file_on_error (temp_name.data ()); |
1861 | ||
1862 | if (to_fd.get () < 0) | |
1863 | error (_("Could not open temporary file \"%s\" for writing: %s"), | |
1864 | temp_name.data (), safe_strerror (errno)); | |
1865 | ||
1866 | if (fcopyfile (from_fd.get (), to_fd.get (), nullptr, | |
1867 | COPYFILE_STAT | COPYFILE_DATA) != 0) | |
1868 | error (_("Could not copy shell to cache as \"%s\": %s"), | |
1869 | temp_name.data (), safe_strerror (errno)); | |
1870 | ||
1871 | /* Be sure that the caching is atomic so that we don't get bad | |
1872 | results from multiple copies of gdb running at the same time. */ | |
1873 | if (rename (temp_name.data (), new_name.c_str ()) != 0) | |
1874 | error (_("Could not rename shell cache file to \"%s\": %s"), | |
1875 | new_name.c_str (), safe_strerror (errno)); | |
1876 | ||
1877 | unlink_file_on_error.keep (); | |
1878 | } | |
1879 | ||
1880 | /* If $SHELL is restricted, try to cache a copy. Starting with El | |
1881 | Capitan, macOS introduced System Integrity Protection. Among other | |
1882 | things, this prevents certain executables from being ptrace'd. In | |
1883 | particular, executables in /bin, like most shells, are affected. | |
1884 | To work around this, while preserving command-line glob expansion | |
1885 | and redirections, gdb will cache a copy of the shell. Return true | |
1886 | if all is well -- either the shell is not subject to SIP or it has | |
1887 | been successfully cached. Returns false if something failed. */ | |
1888 | ||
1889 | static bool | |
1890 | maybe_cache_shell () | |
1891 | { | |
1892 | /* SF_RESTRICTED is defined in sys/stat.h and lets us determine if a | |
1893 | given file is subject to SIP. */ | |
1894 | #ifdef SF_RESTRICTED | |
1895 | ||
1896 | /* If a check fails we want to revert -- maybe the user deleted the | |
1897 | cache while gdb was running, or something like that. */ | |
1898 | copied_shell = nullptr; | |
1899 | ||
1900 | const char *shell = get_shell (); | |
1901 | if (!IS_ABSOLUTE_PATH (shell)) | |
1902 | { | |
1903 | warning (_("This version of macOS has System Integrity Protection.\n\ | |
1904 | Normally gdb would try to work around this by caching a copy of your shell,\n\ | |
1905 | but because your shell (%s) is not an absolute path, this is being skipped."), | |
1906 | shell); | |
1907 | return false; | |
1908 | } | |
1909 | ||
1910 | struct stat sb; | |
1911 | if (stat (shell, &sb) < 0) | |
1912 | { | |
1913 | warning (_("This version of macOS has System Integrity Protection.\n\ | |
1914 | Normally gdb would try to work around this by caching a copy of your shell,\n\ | |
1915 | but because gdb could not stat your shell (%s), this is being skipped.\n\ | |
1916 | The error was: %s"), | |
1917 | shell, safe_strerror (errno)); | |
1918 | return false; | |
1919 | } | |
1920 | ||
1921 | if ((sb.st_flags & SF_RESTRICTED) == 0) | |
1922 | return true; | |
1923 | ||
1924 | /* Put the copy somewhere like ~/Library/Caches/gdb/bin/sh. */ | |
1925 | std::string new_name = get_standard_cache_dir (); | |
1926 | /* There's no need to insert a directory separator here, because | |
1927 | SHELL is known to be absolute. */ | |
1928 | new_name.append (shell); | |
1929 | ||
1930 | /* Maybe it was cached by some earlier gdb. */ | |
1931 | if (stat (new_name.c_str (), &sb) != 0 || !S_ISREG (sb.st_mode)) | |
1932 | { | |
a70b8144 | 1933 | try |
b50a8b9a TT |
1934 | { |
1935 | copy_shell_to_cache (shell, new_name); | |
1936 | } | |
230d2906 | 1937 | catch (const gdb_exception_error &ex) |
b50a8b9a TT |
1938 | { |
1939 | warning (_("This version of macOS has System Integrity Protection.\n\ | |
1940 | Because `startup-with-shell' is enabled, gdb tried to work around SIP by\n\ | |
1941 | caching a copy of your shell. However, this failed:\n\ | |
1942 | %s\n\ | |
1943 | If you correct the problem, gdb will automatically try again the next time\n\ | |
1944 | you \"run\". To prevent these attempts, you can use:\n\ | |
1945 | set startup-with-shell off"), | |
3d6e9d23 | 1946 | ex.what ()); |
b50a8b9a TT |
1947 | return false; |
1948 | } | |
b50a8b9a | 1949 | |
6cb06a8c | 1950 | gdb_printf (_("Note: this version of macOS has System Integrity Protection.\n\ |
b50a8b9a TT |
1951 | Because `startup-with-shell' is enabled, gdb has worked around this by\n\ |
1952 | caching a copy of your shell. The shell used by \"run\" is now:\n\ | |
1953 | %s\n"), | |
6cb06a8c | 1954 | new_name.c_str ()); |
b50a8b9a TT |
1955 | } |
1956 | ||
1957 | /* We need to make sure that the new name has the correct lifetime. */ | |
1958 | static std::string saved_shell = std::move (new_name); | |
1959 | copied_shell = saved_shell.c_str (); | |
1960 | ||
1961 | #endif /* SF_RESTRICTED */ | |
1962 | ||
1963 | return true; | |
1964 | } | |
1965 | ||
f6ac5f3d PA |
1966 | void |
1967 | darwin_nat_target::create_inferior (const char *exec_file, | |
1968 | const std::string &allargs, | |
1969 | char **env, int from_tty) | |
a80b95ba | 1970 | { |
6b09f134 | 1971 | std::optional<scoped_restore_tmpl<bool>> restore_startup_with_shell; |
e7eee665 | 1972 | darwin_nat_target *the_target = this; |
d6be54ef | 1973 | |
b50a8b9a | 1974 | if (startup_with_shell && may_have_sip ()) |
d6be54ef | 1975 | { |
b50a8b9a TT |
1976 | if (!maybe_cache_shell ()) |
1977 | { | |
1978 | warning (_("startup-with-shell is now temporarily disabled")); | |
1979 | restore_startup_with_shell.emplace (&startup_with_shell, 0); | |
1980 | } | |
d6be54ef XR |
1981 | } |
1982 | ||
a80b95ba | 1983 | /* Do the hard work. */ |
db665f42 | 1984 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, |
e7eee665 SM |
1985 | [the_target] (int pid) |
1986 | { | |
1987 | the_target->ptrace_him (pid); | |
1988 | }, | |
1989 | darwin_pre_ptrace, copied_shell, | |
db665f42 | 1990 | darwin_execvp); |
a80b95ba TG |
1991 | } |
1992 | \f | |
1993 | ||
726ce67c JB |
1994 | /* Set things up such that the next call to darwin_wait will immediately |
1995 | return a fake stop event for inferior INF. | |
1996 | ||
1997 | This assumes that the inferior's thread list has been initialized, | |
1998 | as it will suspend the inferior's first thread. */ | |
1999 | ||
2000 | static void | |
2001 | darwin_setup_fake_stop_event (struct inferior *inf) | |
2002 | { | |
089354bb | 2003 | darwin_inferior *priv = get_darwin_inferior (inf); |
726ce67c JB |
2004 | darwin_thread_t *thread; |
2005 | kern_return_t kret; | |
2006 | ||
2007 | gdb_assert (darwin_inf_fake_stop == NULL); | |
2008 | darwin_inf_fake_stop = inf; | |
2009 | ||
2010 | /* When detecting a fake pending stop event, darwin_wait returns | |
2011 | an event saying that the first thread is in a DARWIN_STOPPED | |
2012 | state. To make that accurate, we need to suspend that thread | |
2013 | as well. Otherwise, we'll try resuming it when resuming the | |
2014 | inferior, and get a warning because the thread's suspend count | |
2015 | is already zero, making the resume request useless. */ | |
089354bb | 2016 | thread = priv->threads[0]; |
726ce67c JB |
2017 | kret = thread_suspend (thread->gdb_port); |
2018 | MACH_CHECK_ERROR (kret); | |
2019 | } | |
2020 | ||
a80b95ba TG |
2021 | /* Attach to process PID, then initialize for debugging it |
2022 | and wait for the trace-trap that results from attaching. */ | |
f6ac5f3d PA |
2023 | void |
2024 | darwin_nat_target::attach (const char *args, int from_tty) | |
a80b95ba TG |
2025 | { |
2026 | pid_t pid; | |
a80b95ba | 2027 | struct inferior *inf; |
a80b95ba | 2028 | |
74164c56 | 2029 | pid = parse_pid_to_attach (args); |
a80b95ba | 2030 | |
74164c56 | 2031 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
2032 | error (_("I refuse to debug myself!")); |
2033 | ||
bc521517 | 2034 | target_announce_attach (from_tty, pid); |
bb00b29d | 2035 | |
f6ac5f3d | 2036 | if (pid == 0 || ::kill (pid, 0) < 0) |
bb00b29d | 2037 | error (_("Can't attach to process %d: %s (%d)"), |
dda83cd7 | 2038 | pid, safe_strerror (errno), errno); |
a80b95ba | 2039 | |
6c95b8df PA |
2040 | inf = current_inferior (); |
2041 | inferior_appeared (inf, pid); | |
30220b46 | 2042 | inf->attach_flag = true; |
6c95b8df | 2043 | |
bb00b29d | 2044 | darwin_attach_pid (inf); |
a80b95ba | 2045 | |
bb00b29d | 2046 | darwin_suspend_inferior (inf); |
a80b95ba | 2047 | |
e7eee665 | 2048 | init_thread_list (inf); |
a80b95ba | 2049 | |
089354bb SM |
2050 | darwin_inferior *priv = get_darwin_inferior (inf); |
2051 | ||
cc6bcb54 | 2052 | darwin_check_osabi (priv, inferior_ptid.tid ()); |
a80b95ba | 2053 | |
726ce67c JB |
2054 | darwin_setup_fake_stop_event (inf); |
2055 | ||
089354bb | 2056 | priv->no_ptrace = 1; |
a80b95ba TG |
2057 | } |
2058 | ||
2059 | /* Take a program previously attached to and detaches it. | |
2060 | The program resumes execution and will no longer stop | |
2061 | on signals, etc. We'd better not have left any breakpoints | |
2062 | in the program or it'll die when it hits one. For this | |
2063 | to work, it may be necessary for the process to have been | |
2064 | previously attached. It *might* work if the program was | |
2065 | started via fork. */ | |
f6ac5f3d PA |
2066 | |
2067 | void | |
2068 | darwin_nat_target::detach (inferior *inf, int from_tty) | |
a80b95ba | 2069 | { |
089354bb | 2070 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
2071 | kern_return_t kret; |
2072 | int res; | |
2073 | ||
bb00b29d | 2074 | /* Display message. */ |
0f48b757 | 2075 | target_announce_detach (from_tty); |
a80b95ba | 2076 | |
bb00b29d | 2077 | /* If ptrace() is in use, stop the process. */ |
089354bb | 2078 | if (!priv->no_ptrace) |
e7eee665 | 2079 | stop_inferior (inf); |
a80b95ba | 2080 | |
089354bb | 2081 | kret = darwin_restore_exception_ports (priv); |
a80b95ba TG |
2082 | MACH_CHECK_ERROR (kret); |
2083 | ||
089354bb | 2084 | if (!priv->no_ptrace) |
a80b95ba | 2085 | { |
bb00b29d TG |
2086 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
2087 | if (res != 0) | |
a42a7433 TT |
2088 | warning (_("Unable to detach from process-id %d: %s (%d)"), |
2089 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
2090 | } |
2091 | ||
bb00b29d | 2092 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 2093 | |
5e9bc145 JB |
2094 | /* When using ptrace, we have just performed a PT_DETACH, which |
2095 | resumes the inferior. On the other hand, when we are not using | |
2096 | ptrace, we need to resume its execution ourselves. */ | |
089354bb | 2097 | if (priv->no_ptrace) |
5e9bc145 | 2098 | darwin_resume_inferior (inf); |
a80b95ba | 2099 | |
f6ac5f3d | 2100 | mourn_inferior (); |
a80b95ba TG |
2101 | } |
2102 | ||
a068643d | 2103 | std::string |
f6ac5f3d | 2104 | darwin_nat_target::pid_to_str (ptid_t ptid) |
a80b95ba | 2105 | { |
cc6bcb54 | 2106 | long tid = ptid.tid (); |
bb00b29d TG |
2107 | |
2108 | if (tid != 0) | |
a068643d TT |
2109 | return string_printf (_("Thread 0x%lx of process %u"), |
2110 | tid, ptid.pid ()); | |
a80b95ba | 2111 | |
bb00b29d | 2112 | return normal_pid_to_str (ptid); |
a80b95ba TG |
2113 | } |
2114 | ||
57810aa7 | 2115 | bool |
f6ac5f3d | 2116 | darwin_nat_target::thread_alive (ptid_t ptid) |
a80b95ba | 2117 | { |
57810aa7 | 2118 | return true; |
a80b95ba TG |
2119 | } |
2120 | ||
2121 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
2122 | copy it to RDADDR in gdb's address space. | |
2123 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
2124 | to ADDR in inferior task's address space. | |
85102364 | 2125 | Return 0 on failure; number of bytes read / written otherwise. */ |
3eb831e0 | 2126 | |
a80b95ba TG |
2127 | static int |
2128 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 2129 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 2130 | ULONGEST length) |
a80b95ba | 2131 | { |
bb00b29d | 2132 | kern_return_t kret; |
3eb831e0 | 2133 | mach_vm_size_t res_length = 0; |
a80b95ba | 2134 | |
b55e14c7 YQ |
2135 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
2136 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 2137 | |
3eb831e0 TG |
2138 | /* First read. */ |
2139 | if (rdaddr != NULL) | |
a80b95ba | 2140 | { |
3eb831e0 | 2141 | mach_vm_size_t count; |
a80b95ba | 2142 | |
3eb831e0 TG |
2143 | /* According to target.h(to_xfer_partial), one and only one may be |
2144 | non-null. */ | |
2145 | gdb_assert (wraddr == NULL); | |
a80b95ba | 2146 | |
3eb831e0 TG |
2147 | kret = mach_vm_read_overwrite (task, addr, length, |
2148 | (mach_vm_address_t) rdaddr, &count); | |
2149 | if (kret != KERN_SUCCESS) | |
2150 | { | |
2151 | inferior_debug | |
2152 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
2153 | core_addr_to_string (addr), mach_error_string (kret)); | |
2154 | return 0; | |
2155 | } | |
2156 | return count; | |
2157 | } | |
a80b95ba | 2158 | |
3eb831e0 TG |
2159 | /* See above. */ |
2160 | gdb_assert (wraddr != NULL); | |
a80b95ba | 2161 | |
3eb831e0 | 2162 | while (length != 0) |
a80b95ba | 2163 | { |
3eb831e0 TG |
2164 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
2165 | mach_vm_address_t region_address = (mach_vm_address_t) (addr - offset); | |
2166 | mach_vm_size_t aligned_length = | |
2167 | (mach_vm_size_t) PAGE_ROUND (offset + length); | |
bb00b29d | 2168 | vm_region_submap_short_info_data_64_t info; |
3eb831e0 TG |
2169 | mach_msg_type_number_t count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; |
2170 | natural_t region_depth = 1000; | |
bb00b29d | 2171 | mach_vm_address_t region_start = region_address; |
3eb831e0 TG |
2172 | mach_vm_size_t region_length; |
2173 | mach_vm_size_t write_length; | |
bb00b29d | 2174 | |
3eb831e0 | 2175 | /* Read page protection. */ |
bb00b29d TG |
2176 | kret = mach_vm_region_recurse |
2177 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
2178 | (vm_region_recurse_info_t) &info, &count); | |
2179 | ||
2180 | if (kret != KERN_SUCCESS) | |
a80b95ba | 2181 | { |
bb00b29d TG |
2182 | inferior_debug (1, _("darwin_read_write_inferior: " |
2183 | "mach_vm_region_recurse failed at %s: %s\n"), | |
2184 | core_addr_to_string (region_address), | |
2185 | mach_error_string (kret)); | |
3eb831e0 | 2186 | return res_length; |
a80b95ba TG |
2187 | } |
2188 | ||
bb00b29d TG |
2189 | inferior_debug |
2190 | (9, _("darwin_read_write_inferior: " | |
2191 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
2192 | core_addr_to_string (region_address), | |
2193 | core_addr_to_string (region_start), | |
2194 | core_addr_to_string (region_length)); | |
2195 | ||
0963b4bd | 2196 | /* Check for holes in memory. */ |
bb00b29d | 2197 | if (region_start > region_address) |
a80b95ba | 2198 | { |
0963b4bd | 2199 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 2200 | core_addr_to_string (region_address), |
bb00b29d | 2201 | core_addr_to_string (region_start), |
a80b95ba | 2202 | (unsigned)region_length); |
3eb831e0 | 2203 | return res_length; |
a80b95ba TG |
2204 | } |
2205 | ||
bb00b29d TG |
2206 | /* Adjust the length. */ |
2207 | region_length -= (region_address - region_start); | |
3eb831e0 TG |
2208 | if (region_length > aligned_length) |
2209 | region_length = aligned_length; | |
bb00b29d | 2210 | |
3eb831e0 TG |
2211 | /* Make the pages RW. */ |
2212 | if (!(info.protection & VM_PROT_WRITE)) | |
a80b95ba | 2213 | { |
3eb831e0 TG |
2214 | vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE; |
2215 | ||
2216 | kret = mach_vm_protect (task, region_address, region_length, | |
2217 | FALSE, prot); | |
bb00b29d TG |
2218 | if (kret != KERN_SUCCESS) |
2219 | { | |
3eb831e0 TG |
2220 | prot |= VM_PROT_COPY; |
2221 | kret = mach_vm_protect (task, region_address, region_length, | |
2222 | FALSE, prot); | |
2223 | } | |
2224 | if (kret != KERN_SUCCESS) | |
2225 | { | |
2226 | warning (_("darwin_read_write_inferior: " | |
2227 | "mach_vm_protect failed at %s " | |
2228 | "(len=0x%lx, prot=0x%x): %s"), | |
bb00b29d | 2229 | core_addr_to_string (region_address), |
3eb831e0 | 2230 | (unsigned long) region_length, (unsigned) prot, |
bb00b29d | 2231 | mach_error_string (kret)); |
3eb831e0 | 2232 | return res_length; |
bb00b29d | 2233 | } |
a80b95ba TG |
2234 | } |
2235 | ||
3eb831e0 TG |
2236 | if (offset + length > region_length) |
2237 | write_length = region_length - offset; | |
2238 | else | |
2239 | write_length = length; | |
2240 | ||
2241 | /* Write. */ | |
2242 | kret = mach_vm_write (task, addr, (vm_offset_t) wraddr, write_length); | |
2243 | if (kret != KERN_SUCCESS) | |
2244 | { | |
2245 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
2246 | mach_error_string (kret)); | |
2247 | return res_length; | |
2248 | } | |
2249 | ||
2250 | /* Restore page rights. */ | |
a80b95ba TG |
2251 | if (!(info.protection & VM_PROT_WRITE)) |
2252 | { | |
bb00b29d | 2253 | kret = mach_vm_protect (task, region_address, region_length, |
3eb831e0 | 2254 | FALSE, info.protection); |
bb00b29d | 2255 | if (kret != KERN_SUCCESS) |
a80b95ba | 2256 | { |
3eb831e0 TG |
2257 | warning (_("darwin_read_write_inferior: " |
2258 | "mach_vm_protect restore failed at %s " | |
2259 | "(len=0x%lx): %s"), | |
bb00b29d | 2260 | core_addr_to_string (region_address), |
3eb831e0 TG |
2261 | (unsigned long) region_length, |
2262 | mach_error_string (kret)); | |
a80b95ba TG |
2263 | } |
2264 | } | |
a80b95ba | 2265 | |
3eb831e0 TG |
2266 | addr += write_length; |
2267 | wraddr += write_length; | |
2268 | res_length += write_length; | |
2269 | length -= write_length; | |
a80b95ba | 2270 | } |
3eb831e0 TG |
2271 | |
2272 | return res_length; | |
a80b95ba TG |
2273 | } |
2274 | ||
f00c55f8 | 2275 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
ad2073b0 | 2276 | to RDADDR (in big endian). |
569283d4 | 2277 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 2278 | |
b967eb24 | 2279 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 2280 | /* This is not available in Darwin 9. */ |
9b409511 | 2281 | static enum target_xfer_status |
b9dd1947 | 2282 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 2283 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
2284 | { |
2285 | struct task_dyld_info task_dyld_info; | |
2286 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
f00c55f8 TG |
2287 | kern_return_t kret; |
2288 | ||
ad2073b0 | 2289 | if (addr != 0 || length > sizeof (mach_vm_address_t)) |
9b409511 | 2290 | return TARGET_XFER_EOF; |
f00c55f8 | 2291 | |
ad2073b0 TG |
2292 | kret = task_info (task, TASK_DYLD_INFO, |
2293 | (task_info_t) &task_dyld_info, &count); | |
f00c55f8 TG |
2294 | MACH_CHECK_ERROR (kret); |
2295 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 2296 | return TARGET_XFER_E_IO; |
ad2073b0 TG |
2297 | |
2298 | store_unsigned_integer (rdaddr, length, BFD_ENDIAN_BIG, | |
2299 | task_dyld_info.all_image_info_addr); | |
9b409511 YQ |
2300 | *xfered_len = (ULONGEST) length; |
2301 | return TARGET_XFER_OK; | |
f00c55f8 | 2302 | } |
569283d4 | 2303 | #endif |
f00c55f8 | 2304 | |
a80b95ba | 2305 | \f |
a80b95ba | 2306 | |
f6ac5f3d PA |
2307 | enum target_xfer_status |
2308 | darwin_nat_target::xfer_partial (enum target_object object, const char *annex, | |
2309 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
2310 | ULONGEST offset, ULONGEST len, | |
2311 | ULONGEST *xfered_len) | |
a80b95ba | 2312 | { |
bb00b29d | 2313 | struct inferior *inf = current_inferior (); |
089354bb | 2314 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2315 | |
2316 | inferior_debug | |
b55e14c7 YQ |
2317 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
2318 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
2319 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
2320 | inf->pid); | |
a80b95ba | 2321 | |
f00c55f8 TG |
2322 | switch (object) |
2323 | { | |
2324 | case TARGET_OBJECT_MEMORY: | |
9b409511 | 2325 | { |
089354bb | 2326 | int l = darwin_read_write_inferior (priv->task, offset, |
9b409511 YQ |
2327 | readbuf, writebuf, len); |
2328 | ||
2329 | if (l == 0) | |
2330 | return TARGET_XFER_EOF; | |
2331 | else | |
2332 | { | |
2333 | gdb_assert (l > 0); | |
2334 | *xfered_len = (ULONGEST) l; | |
2335 | return TARGET_XFER_OK; | |
2336 | } | |
2337 | } | |
569283d4 | 2338 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
2339 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
2340 | if (writebuf != NULL || readbuf == NULL) | |
dda83cd7 SM |
2341 | { |
2342 | /* Support only read. */ | |
2343 | return TARGET_XFER_E_IO; | |
2344 | } | |
089354bb | 2345 | return darwin_read_dyld_info (priv->task, offset, readbuf, len, |
9b409511 | 2346 | xfered_len); |
569283d4 | 2347 | #endif |
f00c55f8 | 2348 | default: |
2ed4b548 | 2349 | return TARGET_XFER_E_IO; |
f00c55f8 | 2350 | } |
a80b95ba | 2351 | |
a80b95ba TG |
2352 | } |
2353 | ||
2354 | static void | |
0fc76421 | 2355 | set_enable_mach_exceptions (const char *args, int from_tty, |
a80b95ba TG |
2356 | struct cmd_list_element *c) |
2357 | { | |
d7e15655 | 2358 | if (inferior_ptid != null_ptid) |
a80b95ba | 2359 | { |
bb00b29d | 2360 | struct inferior *inf = current_inferior (); |
089354bb | 2361 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
2362 | exception_mask_t mask; |
2363 | kern_return_t kret; | |
2364 | ||
2365 | if (enable_mach_exceptions) | |
2366 | mask = EXC_MASK_ALL; | |
2367 | else | |
2368 | { | |
089354bb | 2369 | darwin_restore_exception_ports (priv); |
bb00b29d | 2370 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
a80b95ba | 2371 | } |
089354bb | 2372 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
a80b95ba TG |
2373 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2374 | MACH_CHECK_ERROR (kret); | |
2375 | } | |
2376 | } | |
2377 | ||
0e90c441 | 2378 | const char * |
f6ac5f3d | 2379 | darwin_nat_target::pid_to_exec_file (int pid) |
bb00b29d | 2380 | { |
b4ab256d | 2381 | static char path[PATH_MAX]; |
bb00b29d TG |
2382 | int res; |
2383 | ||
d8d2a3ee | 2384 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2385 | if (res >= 0) |
2386 | return path; | |
2387 | else | |
2388 | return NULL; | |
2389 | } | |
2390 | ||
f6ac5f3d | 2391 | ptid_t |
c80e29db | 2392 | darwin_nat_target::get_ada_task_ptid (long lwp, ULONGEST thread) |
bb00b29d | 2393 | { |
bb00b29d | 2394 | struct inferior *inf = current_inferior (); |
089354bb | 2395 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2396 | kern_return_t kret; |
2397 | mach_port_name_array_t names; | |
2398 | mach_msg_type_number_t names_count; | |
2399 | mach_port_type_array_t types; | |
2400 | mach_msg_type_number_t types_count; | |
2401 | long res = 0; | |
2402 | ||
2403 | /* First linear search. */ | |
089354bb SM |
2404 | for (darwin_thread_t *t : priv->threads) |
2405 | { | |
2406 | if (t->inf_port == lwp) | |
e99b03dc | 2407 | return ptid_t (inferior_ptid.pid (), 0, t->gdb_port); |
089354bb | 2408 | } |
bb00b29d TG |
2409 | |
2410 | /* Maybe the port was never extract. Do it now. */ | |
2411 | ||
2412 | /* First get inferior port names. */ | |
089354bb | 2413 | kret = mach_port_names (priv->task, &names, &names_count, &types, |
bb00b29d TG |
2414 | &types_count); |
2415 | MACH_CHECK_ERROR (kret); | |
2416 | if (kret != KERN_SUCCESS) | |
2417 | return null_ptid; | |
2418 | ||
2419 | /* For each name, copy the right in the gdb space and then compare with | |
2420 | our view of the inferior threads. We don't forget to deallocate the | |
2421 | right. */ | |
089354bb | 2422 | for (int i = 0; i < names_count; i++) |
bb00b29d TG |
2423 | { |
2424 | mach_port_t local_name; | |
2425 | mach_msg_type_name_t local_type; | |
2426 | ||
2427 | /* We just need to know the corresponding name in gdb name space. | |
2428 | So extract and deallocate the right. */ | |
089354bb | 2429 | kret = mach_port_extract_right (priv->task, names[i], |
bb00b29d TG |
2430 | MACH_MSG_TYPE_COPY_SEND, |
2431 | &local_name, &local_type); | |
2432 | if (kret != KERN_SUCCESS) | |
2433 | continue; | |
2434 | mach_port_deallocate (gdb_task, local_name); | |
2435 | ||
089354bb SM |
2436 | for (darwin_thread_t *t : priv->threads) |
2437 | { | |
2438 | if (t->gdb_port == local_name) | |
2439 | { | |
2440 | t->inf_port = names[i]; | |
2441 | if (names[i] == lwp) | |
2442 | res = t->gdb_port; | |
2443 | } | |
2444 | } | |
bb00b29d TG |
2445 | } |
2446 | ||
2447 | vm_deallocate (gdb_task, (vm_address_t) names, | |
dda83cd7 | 2448 | names_count * sizeof (mach_port_t)); |
bb00b29d TG |
2449 | |
2450 | if (res) | |
fe7d6a8d | 2451 | return ptid_t (current_inferior ()->pid, 0, res); |
bb00b29d TG |
2452 | else |
2453 | return null_ptid; | |
2454 | } | |
2455 | ||
57810aa7 | 2456 | bool |
f6ac5f3d | 2457 | darwin_nat_target::supports_multi_process () |
bb00b29d | 2458 | { |
57810aa7 | 2459 | return true; |
bb00b29d TG |
2460 | } |
2461 | ||
6c265988 | 2462 | void _initialize_darwin_nat (); |
a80b95ba | 2463 | void |
f6ac5f3d | 2464 | _initialize_darwin_nat () |
a80b95ba TG |
2465 | { |
2466 | kern_return_t kret; | |
2467 | ||
a80b95ba TG |
2468 | gdb_task = mach_task_self (); |
2469 | darwin_host_self = mach_host_self (); | |
2470 | ||
2471 | /* Read page size. */ | |
2472 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2473 | if (kret != KERN_SUCCESS) | |
2474 | { | |
2475 | mach_page_size = 0x1000; | |
2476 | MACH_CHECK_ERROR (kret); | |
2477 | } | |
2478 | ||
3eb831e0 TG |
2479 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), |
2480 | (unsigned long) mach_task_self (), getpid ()); | |
a80b95ba | 2481 | |
ccce17b0 YQ |
2482 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2483 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2484 | Set if printing inferior communication debugging statements."), _("\ |
2485 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2486 | NULL, NULL, |
2487 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2488 | |
2489 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2490 | &enable_mach_exceptions, _("\ | |
2491 | Set if mach exceptions are caught."), _("\ | |
2492 | Show if mach exceptions are caught."), _("\ | |
2493 | When this mode is on, all low level exceptions are reported before being\n\ | |
2494 | reported by the kernel."), | |
2495 | &set_enable_mach_exceptions, NULL, | |
2496 | &setlist, &showlist); | |
2497 | } |