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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
61baf725 | 2 | Copyright (C) 2008-2017 Free Software Foundation, Inc. |
a80b95ba TG |
3 | |
4 | Contributed by AdaCore. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
47d48711 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
a80b95ba TG |
20 | |
21 | #include "defs.h" | |
22 | #include "top.h" | |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "symfile.h" | |
26 | #include "symtab.h" | |
27 | #include "objfiles.h" | |
28 | #include "gdb.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "gdbcore.h" | |
31 | #include "gdbthread.h" | |
32 | #include "regcache.h" | |
33 | #include "event-top.h" | |
34 | #include "inf-loop.h" | |
53ce3c39 | 35 | #include <sys/stat.h> |
a80b95ba TG |
36 | #include "inf-child.h" |
37 | #include "value.h" | |
38 | #include "arch-utils.h" | |
39 | #include "bfd.h" | |
ece0061f | 40 | #include "bfd/mach-o.h" |
a80b95ba TG |
41 | |
42 | #include <sys/ptrace.h> | |
43 | #include <sys/signal.h> | |
4ac15b59 | 44 | #include <setjmp.h> |
a80b95ba TG |
45 | #include <sys/types.h> |
46 | #include <unistd.h> | |
47 | #include <signal.h> | |
a80b95ba | 48 | #include <ctype.h> |
a80b95ba TG |
49 | #include <sys/sysctl.h> |
50 | #include <sys/proc.h> | |
bb00b29d TG |
51 | #include <libproc.h> |
52 | #include <sys/syscall.h> | |
e69860f1 | 53 | #include <spawn.h> |
a80b95ba TG |
54 | |
55 | #include <mach/mach_error.h> | |
56 | #include <mach/mach_vm.h> | |
57 | #include <mach/mach_init.h> | |
58 | #include <mach/vm_map.h> | |
59 | #include <mach/task.h> | |
60 | #include <mach/mach_port.h> | |
61 | #include <mach/thread_act.h> | |
62 | #include <mach/port.h> | |
63 | ||
64 | #include "darwin-nat.h" | |
21ff4686 | 65 | #include "common/filestuff.h" |
01ec7a27 | 66 | #include "nat/fork-inferior.h" |
a80b95ba TG |
67 | |
68 | /* Quick overview. | |
69 | Darwin kernel is Mach + BSD derived kernel. Note that they share the | |
70 | same memory space and are linked together (ie there is no micro-kernel). | |
71 | ||
72 | Although ptrace(2) is available on Darwin, it is not complete. We have | |
73 | to use Mach calls to read and write memory and to modify registers. We | |
74 | also use Mach to get inferior faults. As we cannot use select(2) or | |
75 | signals with Mach port (the Mach communication channel), signals are | |
76 | reported to gdb as an exception. Furthermore we detect death of the | |
77 | inferior through a Mach notification message. This way we only wait | |
78 | on Mach ports. | |
79 | ||
80 | Some Mach documentation is available for Apple xnu source package or | |
81 | from the web. */ | |
82 | ||
83 | ||
84 | #define PTRACE(CMD, PID, ADDR, SIG) \ | |
85 | darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG)) | |
86 | ||
bfedc46a | 87 | static void darwin_interrupt (struct target_ops *self, ptid_t); |
a80b95ba | 88 | |
bb00b29d | 89 | static void darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, |
2ea28649 | 90 | enum gdb_signal signal); |
bb00b29d | 91 | static void darwin_resume (ptid_t ptid, int step, |
2ea28649 | 92 | enum gdb_signal signal); |
bb00b29d TG |
93 | |
94 | static ptid_t darwin_wait_to (struct target_ops *ops, ptid_t ptid, | |
95 | struct target_waitstatus *status, int options); | |
96 | static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status); | |
97 | ||
a80b95ba TG |
98 | static void darwin_mourn_inferior (struct target_ops *ops); |
99 | ||
2ab1c2d9 | 100 | static void darwin_kill_inferior (struct target_ops *ops); |
a80b95ba TG |
101 | |
102 | static void darwin_ptrace_me (void); | |
103 | ||
104 | static void darwin_ptrace_him (int pid); | |
105 | ||
7c5ded6a SDJ |
106 | static void darwin_create_inferior (struct target_ops *ops, |
107 | const char *exec_file, | |
108 | const std::string &allargs, | |
109 | char **env, int from_tty); | |
a80b95ba TG |
110 | |
111 | static void darwin_files_info (struct target_ops *ops); | |
112 | ||
7a114964 | 113 | static const char *darwin_pid_to_str (struct target_ops *ops, ptid_t tpid); |
bb00b29d TG |
114 | |
115 | static int darwin_thread_alive (struct target_ops *ops, ptid_t tpid); | |
a80b95ba | 116 | |
a41f2563 TG |
117 | static void darwin_encode_reply (mig_reply_error_t *reply, |
118 | mach_msg_header_t *hdr, integer_t code); | |
119 | ||
82b19a4d TG |
120 | static void darwin_setup_request_notification (struct inferior *inf); |
121 | static void darwin_deallocate_exception_ports (darwin_inferior *inf); | |
122 | static void darwin_setup_exceptions (struct inferior *inf); | |
123 | static void darwin_deallocate_threads (struct inferior *inf); | |
124 | ||
a80b95ba TG |
125 | /* Target operations for Darwin. */ |
126 | static struct target_ops *darwin_ops; | |
127 | ||
128 | /* Task identifier of gdb. */ | |
129 | static task_t gdb_task; | |
130 | ||
131 | /* A copy of mach_host_self (). */ | |
132 | mach_port_t darwin_host_self; | |
133 | ||
134 | /* Exception port. */ | |
135 | mach_port_t darwin_ex_port; | |
136 | ||
a6290449 | 137 | /* Port set, to wait for answer on all ports. */ |
a80b95ba TG |
138 | mach_port_t darwin_port_set; |
139 | ||
0963b4bd | 140 | /* Page size. */ |
a80b95ba TG |
141 | static vm_size_t mach_page_size; |
142 | ||
143 | /* If Set, catch all mach exceptions (before they are converted to signals | |
144 | by the kernel). */ | |
145 | static int enable_mach_exceptions; | |
146 | ||
bb00b29d TG |
147 | /* Inferior that should report a fake stop event. */ |
148 | static struct inferior *darwin_inf_fake_stop; | |
149 | ||
a80b95ba TG |
150 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
151 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
152 | ||
bb00b29d | 153 | /* This controls output of inferior debugging. */ |
ccce17b0 | 154 | static unsigned int darwin_debug_flag = 0; |
a80b95ba | 155 | |
15c19d39 TG |
156 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
157 | be signed. This is required to get an authorization for task_for_pid. | |
158 | ||
a6290449 TG |
159 | Once gdb is built, you must codesign it with any system-trusted signing |
160 | authority. See taskgated(8) for details. */ | |
15c19d39 TG |
161 | static const unsigned char info_plist[] |
162 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
163 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
164 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
165 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
166 | "<plist version=\"1.0\">\n" | |
167 | "<dict>\n" | |
168 | " <key>CFBundleIdentifier</key>\n" | |
169 | " <string>org.gnu.gdb</string>\n" | |
170 | " <key>CFBundleName</key>\n" | |
171 | " <string>gdb</string>\n" | |
172 | " <key>CFBundleVersion</key>\n" | |
173 | " <string>1.0</string>\n" | |
174 | " <key>SecTaskAccess</key>\n" | |
175 | " <array>\n" | |
176 | " <string>allowed</string>\n" | |
177 | " <string>debug</string>\n" | |
178 | " </array>\n" | |
179 | "</dict>\n" | |
180 | "</plist>\n"; | |
181 | ||
77b64a49 PA |
182 | static void inferior_debug (int level, const char *fmt, ...) |
183 | ATTRIBUTE_PRINTF (2, 3); | |
184 | ||
a80b95ba TG |
185 | static void |
186 | inferior_debug (int level, const char *fmt, ...) | |
187 | { | |
188 | va_list ap; | |
189 | ||
190 | if (darwin_debug_flag < level) | |
191 | return; | |
192 | ||
193 | va_start (ap, fmt); | |
194 | printf_unfiltered (_("[%d inferior]: "), getpid ()); | |
195 | vprintf_unfiltered (fmt, ap); | |
196 | va_end (ap); | |
197 | } | |
198 | ||
199 | void | |
200 | mach_check_error (kern_return_t ret, const char *file, | |
201 | unsigned int line, const char *func) | |
202 | { | |
203 | if (ret == KERN_SUCCESS) | |
204 | return; | |
205 | if (func == NULL) | |
206 | func = _("[UNKNOWN]"); | |
bb00b29d | 207 | |
4f1cdeec | 208 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 209 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
210 | } |
211 | ||
212 | static const char * | |
213 | unparse_exception_type (unsigned int i) | |
214 | { | |
215 | static char unknown_exception_buf[32]; | |
216 | ||
217 | switch (i) | |
218 | { | |
219 | case EXC_BAD_ACCESS: | |
220 | return "EXC_BAD_ACCESS"; | |
221 | case EXC_BAD_INSTRUCTION: | |
222 | return "EXC_BAD_INSTRUCTION"; | |
223 | case EXC_ARITHMETIC: | |
224 | return "EXC_ARITHMETIC"; | |
225 | case EXC_EMULATION: | |
226 | return "EXC_EMULATION"; | |
227 | case EXC_SOFTWARE: | |
228 | return "EXC_SOFTWARE"; | |
229 | case EXC_BREAKPOINT: | |
230 | return "EXC_BREAKPOINT"; | |
231 | case EXC_SYSCALL: | |
232 | return "EXC_SYSCALL"; | |
233 | case EXC_MACH_SYSCALL: | |
234 | return "EXC_MACH_SYSCALL"; | |
235 | case EXC_RPC_ALERT: | |
236 | return "EXC_RPC_ALERT"; | |
237 | case EXC_CRASH: | |
238 | return "EXC_CRASH"; | |
239 | default: | |
240 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
241 | return unknown_exception_buf; | |
242 | } | |
243 | } | |
244 | ||
a7aa0d73 JB |
245 | /* Set errno to zero, and then call ptrace with the given arguments. |
246 | If inferior debugging traces are on, then also print a debug | |
247 | trace. | |
248 | ||
249 | The returned value is the same as the value returned by ptrace, | |
250 | except in the case where that value is -1 but errno is zero. | |
251 | This case is documented to be a non-error situation, so we | |
252 | return zero in that case. */ | |
253 | ||
a80b95ba TG |
254 | static int |
255 | darwin_ptrace (const char *name, | |
aa14fb50 | 256 | int request, int pid, caddr_t arg3, int arg4) |
a80b95ba TG |
257 | { |
258 | int ret; | |
259 | ||
a7aa0d73 | 260 | errno = 0; |
aa14fb50 | 261 | ret = ptrace (request, pid, arg3, arg4); |
a7aa0d73 JB |
262 | if (ret == -1 && errno == 0) |
263 | ret = 0; | |
a80b95ba | 264 | |
3eb831e0 TG |
265 | inferior_debug (4, _("ptrace (%s, %d, 0x%lx, %d): %d (%s)\n"), |
266 | name, pid, (unsigned long) arg3, arg4, ret, | |
a3224241 | 267 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
268 | return ret; |
269 | } | |
270 | ||
271 | static int | |
272 | cmp_thread_t (const void *l, const void *r) | |
273 | { | |
bb00b29d TG |
274 | thread_t tl = *(const thread_t *)l; |
275 | thread_t tr = *(const thread_t *)r; | |
276 | return (int)(tl - tr); | |
a80b95ba TG |
277 | } |
278 | ||
279 | static void | |
bb00b29d | 280 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
281 | { |
282 | kern_return_t kret; | |
283 | unsigned int i; | |
284 | thread_array_t thread_list; | |
285 | unsigned int new_nbr; | |
286 | unsigned int old_nbr; | |
287 | unsigned int new_ix, old_ix; | |
fe978cb0 | 288 | darwin_inferior *darwin_inf = inf->priv; |
bb00b29d | 289 | VEC (darwin_thread_t) *thread_vec; |
a80b95ba TG |
290 | |
291 | /* Get list of threads. */ | |
bb00b29d | 292 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
293 | MACH_CHECK_ERROR (kret); |
294 | if (kret != KERN_SUCCESS) | |
295 | return; | |
296 | ||
bb00b29d | 297 | /* Sort the list. */ |
a80b95ba TG |
298 | if (new_nbr > 1) |
299 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
300 | ||
bb00b29d TG |
301 | if (darwin_inf->threads) |
302 | old_nbr = VEC_length (darwin_thread_t, darwin_inf->threads); | |
a80b95ba TG |
303 | else |
304 | old_nbr = 0; | |
305 | ||
bb00b29d TG |
306 | /* Quick check for no changes. */ |
307 | if (old_nbr == new_nbr) | |
308 | { | |
309 | for (i = 0; i < new_nbr; i++) | |
310 | if (thread_list[i] | |
311 | != VEC_index (darwin_thread_t, darwin_inf->threads, i)->gdb_port) | |
312 | break; | |
313 | if (i == new_nbr) | |
314 | { | |
15a9128a TG |
315 | /* Deallocate ports. */ |
316 | for (i = 0; i < new_nbr; i++) | |
317 | { | |
318 | kret = mach_port_deallocate (mach_task_self (), thread_list[i]); | |
319 | MACH_CHECK_ERROR (kret); | |
320 | } | |
321 | ||
322 | /* Deallocate the buffer. */ | |
bb00b29d TG |
323 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
324 | new_nbr * sizeof (int)); | |
325 | MACH_CHECK_ERROR (kret); | |
15a9128a | 326 | |
bb00b29d TG |
327 | return; |
328 | } | |
329 | } | |
330 | ||
82b19a4d | 331 | /* Full handling: detect new threads, remove dead threads. */ |
bb00b29d TG |
332 | thread_vec = VEC_alloc (darwin_thread_t, new_nbr); |
333 | ||
a80b95ba TG |
334 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
335 | { | |
336 | thread_t new_id = (new_ix < new_nbr) ? | |
337 | thread_list[new_ix] : THREAD_NULL; | |
bb00b29d TG |
338 | darwin_thread_t *old = (old_ix < old_nbr) ? |
339 | VEC_index (darwin_thread_t, darwin_inf->threads, old_ix) : NULL; | |
340 | thread_t old_id = old ? old->gdb_port : THREAD_NULL; | |
341 | ||
342 | inferior_debug | |
c8c9911f | 343 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"), |
bb00b29d | 344 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
a80b95ba TG |
345 | |
346 | if (old_id == new_id) | |
347 | { | |
348 | /* Thread still exist. */ | |
bb00b29d | 349 | VEC_safe_push (darwin_thread_t, thread_vec, old); |
a80b95ba TG |
350 | new_ix++; |
351 | old_ix++; | |
352 | ||
15a9128a TG |
353 | /* Deallocate the port. */ |
354 | kret = mach_port_deallocate (gdb_task, new_id); | |
a80b95ba | 355 | MACH_CHECK_ERROR (kret); |
15a9128a | 356 | |
a80b95ba TG |
357 | continue; |
358 | } | |
bb00b29d TG |
359 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
360 | { | |
361 | /* Ignore dead ports. | |
362 | In some weird cases, we might get dead ports. They should | |
363 | correspond to dead thread so they could safely be ignored. */ | |
364 | new_ix++; | |
365 | continue; | |
366 | } | |
367 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
368 | { |
369 | /* A thread was created. */ | |
370 | struct thread_info *tp; | |
bb00b29d | 371 | struct private_thread_info *pti; |
a80b95ba | 372 | |
41bf6aca | 373 | pti = XCNEW (struct private_thread_info); |
bb00b29d TG |
374 | pti->gdb_port = new_id; |
375 | pti->msg_state = DARWIN_RUNNING; | |
376 | ||
82b19a4d | 377 | if (old_nbr == 0 && new_ix == 0) |
bb00b29d | 378 | { |
82b19a4d TG |
379 | /* A ptid is create when the inferior is started (see |
380 | fork-child.c) with lwp=tid=0. This ptid will be renamed | |
381 | later by darwin_init_thread_list (). */ | |
bb00b29d TG |
382 | tp = find_thread_ptid (ptid_build (inf->pid, 0, 0)); |
383 | gdb_assert (tp); | |
82b19a4d | 384 | gdb_assert (tp->priv == NULL); |
fe978cb0 | 385 | tp->priv = pti; |
bb00b29d | 386 | } |
82b19a4d TG |
387 | else |
388 | { | |
389 | /* Add the new thread. */ | |
390 | tp = add_thread_with_info | |
391 | (ptid_build (inf->pid, 0, new_id), pti); | |
392 | } | |
bb00b29d | 393 | VEC_safe_push (darwin_thread_t, thread_vec, pti); |
a80b95ba TG |
394 | new_ix++; |
395 | continue; | |
396 | } | |
bb00b29d | 397 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
398 | { |
399 | /* A thread was removed. */ | |
400 | delete_thread (ptid_build (inf->pid, 0, old_id)); | |
401 | kret = mach_port_deallocate (gdb_task, old_id); | |
402 | MACH_CHECK_ERROR (kret); | |
403 | old_ix++; | |
bb00b29d | 404 | continue; |
a80b95ba | 405 | } |
f3574227 | 406 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
407 | } |
408 | ||
bb00b29d TG |
409 | if (darwin_inf->threads) |
410 | VEC_free (darwin_thread_t, darwin_inf->threads); | |
411 | darwin_inf->threads = thread_vec; | |
a80b95ba | 412 | |
15a9128a | 413 | /* Deallocate the buffer. */ |
a80b95ba TG |
414 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
415 | new_nbr * sizeof (int)); | |
416 | MACH_CHECK_ERROR (kret); | |
417 | } | |
418 | ||
bb00b29d TG |
419 | static int |
420 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 421 | { |
82b19a4d | 422 | return inf->priv->task == *(task_t *)port_ptr; |
bb00b29d | 423 | } |
a80b95ba | 424 | |
bb00b29d | 425 | static int |
82b19a4d | 426 | find_inferior_pid_it (struct inferior *inf, void *pid_ptr) |
bb00b29d | 427 | { |
82b19a4d | 428 | return inf->pid == *(int *)pid_ptr; |
a80b95ba TG |
429 | } |
430 | ||
bb00b29d TG |
431 | /* Return an inferior by task port. */ |
432 | static struct inferior * | |
433 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 434 | { |
bb00b29d TG |
435 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
436 | } | |
a80b95ba | 437 | |
82b19a4d | 438 | /* Return an inferior by pid port. */ |
bb00b29d | 439 | static struct inferior * |
82b19a4d | 440 | darwin_find_inferior_by_pid (int pid) |
bb00b29d | 441 | { |
82b19a4d | 442 | return iterate_over_inferiors (&find_inferior_pid_it, &pid); |
bb00b29d | 443 | } |
a80b95ba | 444 | |
bb00b29d TG |
445 | /* Return a thread by port. */ |
446 | static darwin_thread_t * | |
447 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
448 | { | |
449 | darwin_thread_t *t; | |
450 | int k; | |
451 | ||
452 | for (k = 0; | |
fe978cb0 | 453 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
454 | k++) |
455 | if (t->gdb_port == thread) | |
456 | return t; | |
457 | return NULL; | |
458 | } | |
a80b95ba | 459 | |
bb00b29d | 460 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 461 | |
bb00b29d TG |
462 | static void |
463 | darwin_suspend_inferior (struct inferior *inf) | |
464 | { | |
fe978cb0 | 465 | if (!inf->priv->suspended) |
a80b95ba | 466 | { |
bb00b29d | 467 | kern_return_t kret; |
a80b95ba | 468 | |
fe978cb0 | 469 | kret = task_suspend (inf->priv->task); |
bb00b29d | 470 | MACH_CHECK_ERROR (kret); |
a80b95ba | 471 | |
fe978cb0 | 472 | inf->priv->suspended = 1; |
bb00b29d TG |
473 | } |
474 | } | |
a80b95ba | 475 | |
bb00b29d | 476 | /* Resume an inferior at Mach level. */ |
a80b95ba | 477 | |
bb00b29d TG |
478 | static void |
479 | darwin_resume_inferior (struct inferior *inf) | |
480 | { | |
fe978cb0 | 481 | if (inf->priv->suspended) |
bb00b29d TG |
482 | { |
483 | kern_return_t kret; | |
a80b95ba | 484 | |
fe978cb0 | 485 | kret = task_resume (inf->priv->task); |
bb00b29d TG |
486 | MACH_CHECK_ERROR (kret); |
487 | ||
fe978cb0 | 488 | inf->priv->suspended = 0; |
a80b95ba TG |
489 | } |
490 | } | |
491 | ||
bb00b29d TG |
492 | /* Iterator functions. */ |
493 | ||
494 | static int | |
495 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 496 | { |
bb00b29d TG |
497 | darwin_suspend_inferior (inf); |
498 | darwin_check_new_threads (inf); | |
499 | return 0; | |
500 | } | |
501 | ||
502 | static int | |
503 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
504 | { | |
505 | darwin_resume_inferior (inf); | |
506 | return 0; | |
a80b95ba TG |
507 | } |
508 | ||
bb00b29d TG |
509 | static void |
510 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
511 | { | |
512 | printf_unfiltered (_("message header:\n")); | |
513 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
514 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
515 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
516 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
517 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
518 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
519 | ||
520 | if (disp_body) | |
521 | { | |
522 | const unsigned char *data; | |
a6290449 | 523 | const unsigned int *ldata; |
bb00b29d TG |
524 | int size; |
525 | int i; | |
526 | ||
527 | data = (unsigned char *)(hdr + 1); | |
528 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
529 | ||
530 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
531 | { | |
532 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
533 | mach_msg_port_descriptor_t *desc = | |
534 | (mach_msg_port_descriptor_t *)(bod + 1); | |
535 | int k; | |
536 | NDR_record_t *ndr; | |
537 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
538 | bod->msgh_descriptor_count); | |
539 | data += sizeof (mach_msg_body_t); | |
540 | size -= sizeof (mach_msg_body_t); | |
541 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
542 | switch (desc[k].type) | |
543 | { | |
544 | case MACH_MSG_PORT_DESCRIPTOR: | |
545 | printf_unfiltered | |
546 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
547 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
548 | break; | |
549 | default: | |
550 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
551 | k, desc[k].type); | |
552 | break; | |
553 | } | |
554 | data += bod->msgh_descriptor_count | |
555 | * sizeof (mach_msg_port_descriptor_t); | |
556 | size -= bod->msgh_descriptor_count | |
557 | * sizeof (mach_msg_port_descriptor_t); | |
558 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
559 | printf_unfiltered | |
560 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
561 | "int=%02x char=%02x float=%02x\n"), | |
562 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
563 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
564 | data += sizeof (NDR_record_t); | |
565 | size -= sizeof (NDR_record_t); | |
566 | } | |
567 | ||
568 | printf_unfiltered (_(" data:")); | |
a6290449 TG |
569 | ldata = (const unsigned int *)data; |
570 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
571 | printf_unfiltered (" %08x", ldata[i]); | |
bb00b29d TG |
572 | printf_unfiltered (_("\n")); |
573 | } | |
574 | } | |
575 | ||
82b19a4d TG |
576 | /* Adjust inferior data when a new task was created. */ |
577 | ||
578 | static struct inferior * | |
579 | darwin_find_new_inferior (task_t task_port, thread_t thread_port) | |
580 | { | |
581 | int task_pid; | |
582 | struct inferior *inf; | |
583 | kern_return_t kret; | |
584 | mach_port_t prev; | |
585 | ||
586 | /* Find the corresponding pid. */ | |
587 | kret = pid_for_task (task_port, &task_pid); | |
588 | if (kret != KERN_SUCCESS) | |
589 | { | |
590 | MACH_CHECK_ERROR (kret); | |
591 | return NULL; | |
592 | } | |
593 | ||
594 | /* Find the inferior for this pid. */ | |
595 | inf = darwin_find_inferior_by_pid (task_pid); | |
596 | if (inf == NULL) | |
597 | return NULL; | |
598 | ||
599 | /* Deallocate saved exception ports. */ | |
600 | darwin_deallocate_exception_ports (inf->priv); | |
601 | ||
602 | /* No need to remove dead_name notification, but still... */ | |
603 | kret = mach_port_request_notification (gdb_task, inf->priv->task, | |
604 | MACH_NOTIFY_DEAD_NAME, 0, | |
605 | MACH_PORT_NULL, | |
606 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
607 | &prev); | |
608 | if (kret != KERN_INVALID_ARGUMENT) | |
609 | MACH_CHECK_ERROR (kret); | |
610 | ||
611 | /* Replace old task port. */ | |
612 | kret = mach_port_deallocate (gdb_task, inf->priv->task); | |
613 | MACH_CHECK_ERROR (kret); | |
614 | inf->priv->task = task_port; | |
615 | ||
616 | darwin_setup_request_notification (inf); | |
617 | darwin_setup_exceptions (inf); | |
618 | ||
619 | return inf; | |
620 | } | |
621 | ||
622 | /* Check data representation. */ | |
623 | ||
624 | static int | |
625 | darwin_check_message_ndr (NDR_record_t *ndr) | |
626 | { | |
627 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
628 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
629 | || ndr->mig_encoding != NDR_record.mig_encoding | |
630 | || ndr->int_rep != NDR_record.int_rep | |
631 | || ndr->char_rep != NDR_record.char_rep | |
632 | || ndr->float_rep != NDR_record.float_rep) | |
633 | return -1; | |
634 | return 0; | |
635 | } | |
636 | ||
637 | /* Decode an exception message. */ | |
638 | ||
bb00b29d TG |
639 | static int |
640 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
641 | struct inferior **pinf, | |
642 | darwin_thread_t **pthread) | |
a80b95ba | 643 | { |
bb00b29d TG |
644 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
645 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
646 | NDR_record_t *ndr; | |
647 | integer_t *data; | |
648 | struct inferior *inf; | |
649 | darwin_thread_t *thread; | |
650 | task_t task_port; | |
651 | thread_t thread_port; | |
a80b95ba | 652 | kern_return_t kret; |
bb00b29d | 653 | int i; |
a80b95ba | 654 | |
a41f2563 TG |
655 | /* Check message destination. */ |
656 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
657 | return -1; |
658 | ||
659 | /* Check message header. */ | |
660 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
661 | return -1; | |
662 | ||
663 | /* Check descriptors. */ | |
664 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
665 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
666 | || bod->msgh_descriptor_count != 2 | |
667 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
668 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
669 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
670 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
671 | return -1; | |
672 | ||
673 | /* Check data representation. */ | |
674 | ndr = (NDR_record_t *)(desc + 2); | |
82b19a4d | 675 | if (darwin_check_message_ndr (ndr) != 0) |
bb00b29d TG |
676 | return -1; |
677 | ||
678 | /* Ok, the hard work. */ | |
679 | data = (integer_t *)(ndr + 1); | |
680 | ||
bb00b29d TG |
681 | task_port = desc[1].name; |
682 | thread_port = desc[0].name; | |
a41f2563 | 683 | |
a41f2563 | 684 | /* Find process by port. */ |
bb00b29d | 685 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 686 | *pinf = inf; |
82b19a4d TG |
687 | |
688 | if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2 | |
689 | && data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP) | |
690 | { | |
691 | /* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0, | |
692 | as a new Mach task is created when a process exec. */ | |
693 | inf = darwin_find_new_inferior (task_port, thread_port); | |
694 | *pinf = inf; | |
695 | ||
696 | if (inf == NULL) | |
697 | { | |
698 | /* Deallocate task_port, unless it was saved. */ | |
699 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
700 | MACH_CHECK_ERROR (kret); | |
701 | } | |
702 | } | |
703 | else | |
704 | { | |
705 | /* We got new rights to the task, get rid of it. Do not get rid of | |
706 | thread right, as we will need it to find the thread. */ | |
707 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
708 | MACH_CHECK_ERROR (kret); | |
709 | } | |
710 | ||
a41f2563 TG |
711 | if (inf == NULL) |
712 | { | |
713 | /* Not a known inferior. This could happen if the child fork, as | |
714 | the created process will inherit its exception port. | |
715 | FIXME: should the exception port be restored ? */ | |
716 | kern_return_t kret; | |
717 | mig_reply_error_t reply; | |
718 | ||
82b19a4d TG |
719 | inferior_debug |
720 | (4, _("darwin_decode_exception_message: unknown task 0x%x\n"), | |
721 | task_port); | |
722 | ||
15a9128a TG |
723 | /* Free thread port (we don't know it). */ |
724 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
725 | MACH_CHECK_ERROR (kret); | |
726 | ||
a41f2563 TG |
727 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); |
728 | ||
729 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
730 | reply.Head.msgh_size, 0, | |
731 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
732 | MACH_PORT_NULL); | |
733 | MACH_CHECK_ERROR (kret); | |
734 | ||
735 | return 0; | |
736 | } | |
bb00b29d TG |
737 | |
738 | /* Find thread by port. */ | |
739 | /* Check for new threads. Do it early so that the port in the exception | |
740 | message can be deallocated. */ | |
741 | darwin_check_new_threads (inf); | |
742 | ||
15a9128a TG |
743 | /* Free the thread port (as gdb knows the thread, it has already has a right |
744 | for it, so this just decrement a reference counter). */ | |
745 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
746 | MACH_CHECK_ERROR (kret); | |
747 | ||
bb00b29d TG |
748 | thread = darwin_find_thread (inf, thread_port); |
749 | if (thread == NULL) | |
750 | return -1; | |
751 | *pthread = thread; | |
752 | ||
a6290449 TG |
753 | /* The thread should be running. However we have observed cases where a |
754 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
755 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
756 | ||
bb00b29d | 757 | /* Finish decoding. */ |
bb00b29d TG |
758 | thread->event.header = *hdr; |
759 | thread->event.thread_port = thread_port; | |
760 | thread->event.task_port = task_port; | |
761 | thread->event.ex_type = data[0]; | |
762 | thread->event.data_count = data[1]; | |
763 | ||
764 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
765 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
766 | + data[1] * sizeof (integer_t))) | |
767 | return -1; | |
768 | for (i = 0; i < data[1]; i++) | |
769 | thread->event.ex_data[i] = data[2 + i]; | |
770 | ||
771 | thread->msg_state = DARWIN_MESSAGE; | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
82b19a4d TG |
776 | /* Decode dead_name notify message. */ |
777 | ||
778 | static int | |
779 | darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf) | |
780 | { | |
781 | NDR_record_t *ndr = (NDR_record_t *)(hdr + 1); | |
782 | integer_t *data = (integer_t *)(ndr + 1); | |
783 | struct inferior *inf; | |
784 | darwin_thread_t *thread; | |
785 | task_t task_port; | |
786 | thread_t thread_port; | |
787 | kern_return_t kret; | |
788 | int i; | |
789 | ||
790 | /* Check message header. */ | |
791 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
792 | return -1; | |
793 | ||
794 | /* Check descriptors. */ | |
795 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t))) | |
796 | return -2; | |
797 | ||
798 | /* Check data representation. */ | |
799 | if (darwin_check_message_ndr (ndr) != 0) | |
800 | return -3; | |
801 | ||
802 | task_port = data[0]; | |
803 | ||
804 | /* Find process by port. */ | |
805 | inf = darwin_find_inferior_by_task (task_port); | |
806 | *pinf = inf; | |
807 | ||
808 | /* Check message destination. */ | |
809 | if (inf != NULL && hdr->msgh_local_port != inf->priv->notify_port) | |
810 | return -4; | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
bb00b29d TG |
815 | static void |
816 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
817 | integer_t code) | |
818 | { | |
819 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
820 | |
821 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 822 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 823 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
824 | rh->msgh_local_port = MACH_PORT_NULL; |
825 | rh->msgh_id = hdr->msgh_id + 100; | |
826 | ||
827 | reply->NDR = NDR_record; | |
828 | reply->RetCode = code; | |
a80b95ba TG |
829 | } |
830 | ||
bb00b29d TG |
831 | static void |
832 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
833 | { |
834 | kern_return_t kret; | |
bb00b29d | 835 | mig_reply_error_t reply; |
a80b95ba | 836 | |
bb00b29d TG |
837 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
838 | ||
839 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
840 | reply.Head.msgh_size, 0, | |
841 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
842 | MACH_PORT_NULL); | |
a80b95ba TG |
843 | MACH_CHECK_ERROR (kret); |
844 | ||
fe978cb0 | 845 | inf->priv->pending_messages--; |
bb00b29d TG |
846 | } |
847 | ||
848 | static void | |
849 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
850 | int step, int nsignal) | |
851 | { | |
852 | kern_return_t kret; | |
853 | int res; | |
854 | ||
a80b95ba | 855 | inferior_debug |
bb00b29d TG |
856 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
857 | thread->msg_state, thread->gdb_port, step, nsignal); | |
858 | ||
859 | switch (thread->msg_state) | |
a80b95ba | 860 | { |
bb00b29d TG |
861 | case DARWIN_MESSAGE: |
862 | if (thread->event.ex_type == EXC_SOFTWARE | |
863 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
864 | { | |
865 | /* Either deliver a new signal or cancel the signal received. */ | |
866 | res = PTRACE (PT_THUPDATE, inf->pid, | |
597e448c | 867 | (caddr_t) (uintptr_t) thread->gdb_port, nsignal); |
bb00b29d TG |
868 | if (res < 0) |
869 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
870 | } | |
871 | else if (nsignal) | |
872 | { | |
873 | /* Note: ptrace is allowed only if the process is stopped. | |
874 | Directly send the signal to the thread. */ | |
875 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
876 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), | |
877 | thread->gdb_port, nsignal, res); | |
878 | thread->signaled = 1; | |
879 | } | |
880 | ||
d987a266 | 881 | /* Set or reset single step. */ |
aa14fb50 TG |
882 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
883 | thread->gdb_port, step); | |
884 | darwin_set_sstep (thread->gdb_port, step); | |
885 | thread->single_step = step; | |
bb00b29d TG |
886 | |
887 | darwin_send_reply (inf, thread); | |
888 | thread->msg_state = DARWIN_RUNNING; | |
889 | break; | |
890 | ||
891 | case DARWIN_RUNNING: | |
892 | break; | |
893 | ||
894 | case DARWIN_STOPPED: | |
895 | kret = thread_resume (thread->gdb_port); | |
896 | MACH_CHECK_ERROR (kret); | |
897 | ||
898 | thread->msg_state = DARWIN_RUNNING; | |
899 | break; | |
a80b95ba | 900 | } |
bb00b29d | 901 | } |
a80b95ba | 902 | |
bb00b29d | 903 | /* Resume all threads of the inferior. */ |
a80b95ba | 904 | |
bb00b29d TG |
905 | static void |
906 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
907 | { | |
908 | darwin_thread_t *thread; | |
909 | int k; | |
910 | ||
911 | for (k = 0; | |
fe978cb0 | 912 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, thread); |
bb00b29d TG |
913 | k++) |
914 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
915 | } |
916 | ||
bb00b29d | 917 | struct resume_inferior_threads_param |
a80b95ba | 918 | { |
bb00b29d TG |
919 | int step; |
920 | int nsignal; | |
921 | }; | |
922 | ||
923 | static int | |
924 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
925 | { | |
926 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
927 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
928 | ||
929 | darwin_resume_inferior_threads (inf, step, nsignal); | |
930 | ||
931 | return 0; | |
932 | } | |
933 | ||
934 | /* Suspend all threads of INF. */ | |
935 | ||
936 | static void | |
937 | darwin_suspend_inferior_threads (struct inferior *inf) | |
938 | { | |
939 | darwin_thread_t *thread; | |
a80b95ba | 940 | kern_return_t kret; |
bb00b29d TG |
941 | int k; |
942 | ||
943 | for (k = 0; | |
fe978cb0 | 944 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, thread); |
bb00b29d TG |
945 | k++) |
946 | switch (thread->msg_state) | |
947 | { | |
948 | case DARWIN_STOPPED: | |
949 | case DARWIN_MESSAGE: | |
950 | break; | |
951 | case DARWIN_RUNNING: | |
952 | kret = thread_suspend (thread->gdb_port); | |
953 | MACH_CHECK_ERROR (kret); | |
954 | thread->msg_state = DARWIN_STOPPED; | |
955 | break; | |
956 | } | |
957 | } | |
a80b95ba | 958 | |
bb00b29d | 959 | static void |
2ea28649 | 960 | darwin_resume (ptid_t ptid, int step, enum gdb_signal signal) |
bb00b29d TG |
961 | { |
962 | struct target_waitstatus status; | |
963 | int pid; | |
a80b95ba | 964 | |
bb00b29d TG |
965 | kern_return_t kret; |
966 | int res; | |
967 | int nsignal; | |
968 | struct inferior *inf; | |
a80b95ba | 969 | |
bb00b29d | 970 | inferior_debug |
3eb831e0 | 971 | (2, _("darwin_resume: pid=%d, tid=0x%lx, step=%d, signal=%d\n"), |
bb00b29d TG |
972 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); |
973 | ||
a493e3e2 | 974 | if (signal == GDB_SIGNAL_0) |
bb00b29d TG |
975 | nsignal = 0; |
976 | else | |
2ea28649 | 977 | nsignal = gdb_signal_to_host (signal); |
a80b95ba | 978 | |
bb00b29d TG |
979 | /* Don't try to single step all threads. */ |
980 | if (step) | |
981 | ptid = inferior_ptid; | |
982 | ||
983 | /* minus_one_ptid is RESUME_ALL. */ | |
984 | if (ptid_equal (ptid, minus_one_ptid)) | |
a80b95ba | 985 | { |
bb00b29d TG |
986 | struct resume_inferior_threads_param param; |
987 | ||
988 | param.nsignal = nsignal; | |
989 | param.step = step; | |
a80b95ba | 990 | |
bb00b29d TG |
991 | /* Resume threads. */ |
992 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
993 | /* Resume tasks. */ | |
994 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
995 | } | |
996 | else | |
a80b95ba | 997 | { |
c9657e70 | 998 | struct inferior *inf = find_inferior_ptid (ptid); |
bb00b29d TG |
999 | long tid = ptid_get_tid (ptid); |
1000 | ||
1001 | /* Stop the inferior (should be useless). */ | |
1002 | darwin_suspend_inferior (inf); | |
1003 | ||
1004 | if (tid == 0) | |
1005 | darwin_resume_inferior_threads (inf, step, nsignal); | |
1006 | else | |
1007 | { | |
1008 | darwin_thread_t *thread; | |
1009 | ||
1010 | /* Suspend threads of the task. */ | |
1011 | darwin_suspend_inferior_threads (inf); | |
1012 | ||
1013 | /* Resume the selected thread. */ | |
1014 | thread = darwin_find_thread (inf, tid); | |
1015 | gdb_assert (thread); | |
1016 | darwin_resume_thread (inf, thread, step, nsignal); | |
1017 | } | |
1018 | ||
1019 | /* Resume the task. */ | |
1020 | darwin_resume_inferior (inf); | |
a80b95ba | 1021 | } |
bb00b29d | 1022 | } |
a80b95ba | 1023 | |
bb00b29d TG |
1024 | static void |
1025 | darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 1026 | enum gdb_signal signal) |
bb00b29d TG |
1027 | { |
1028 | return darwin_resume (ptid, step, signal); | |
1029 | } | |
1030 | ||
1031 | static ptid_t | |
1032 | darwin_decode_message (mach_msg_header_t *hdr, | |
1033 | darwin_thread_t **pthread, | |
1034 | struct inferior **pinf, | |
1035 | struct target_waitstatus *status) | |
1036 | { | |
1037 | darwin_thread_t *thread; | |
1038 | struct inferior *inf; | |
a80b95ba | 1039 | |
a41f2563 TG |
1040 | /* Exception message. 2401 == 0x961 is exc. */ |
1041 | if (hdr->msgh_id == 2401) | |
a80b95ba | 1042 | { |
bb00b29d TG |
1043 | int res; |
1044 | ||
1045 | /* Decode message. */ | |
1046 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
1047 | ||
1048 | if (res < 0) | |
a80b95ba | 1049 | { |
bb00b29d | 1050 | /* Should not happen... */ |
c8c9911f JB |
1051 | printf_unfiltered |
1052 | (_("darwin_wait: ill-formatted message (id=0x%x)\n"), hdr->msgh_id); | |
bb00b29d | 1053 | /* FIXME: send a failure reply? */ |
a41f2563 TG |
1054 | status->kind = TARGET_WAITKIND_IGNORE; |
1055 | return minus_one_ptid; | |
1056 | } | |
1057 | if (inf == NULL) | |
1058 | { | |
1059 | status->kind = TARGET_WAITKIND_IGNORE; | |
a80b95ba TG |
1060 | return minus_one_ptid; |
1061 | } | |
bb00b29d TG |
1062 | *pinf = inf; |
1063 | *pthread = thread; | |
fe978cb0 | 1064 | inf->priv->pending_messages++; |
a80b95ba TG |
1065 | |
1066 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
1067 | thread->msg_state = DARWIN_MESSAGE; |
1068 | ||
c8c9911f | 1069 | inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"), |
bb00b29d TG |
1070 | thread->gdb_port, |
1071 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 1072 | |
bb00b29d | 1073 | switch (thread->event.ex_type) |
a80b95ba TG |
1074 | { |
1075 | case EXC_BAD_ACCESS: | |
4e225075 | 1076 | status->value.sig = GDB_EXC_BAD_ACCESS; |
a80b95ba TG |
1077 | break; |
1078 | case EXC_BAD_INSTRUCTION: | |
4e225075 | 1079 | status->value.sig = GDB_EXC_BAD_INSTRUCTION; |
a80b95ba TG |
1080 | break; |
1081 | case EXC_ARITHMETIC: | |
4e225075 | 1082 | status->value.sig = GDB_EXC_ARITHMETIC; |
a80b95ba TG |
1083 | break; |
1084 | case EXC_EMULATION: | |
4e225075 | 1085 | status->value.sig = GDB_EXC_EMULATION; |
a80b95ba TG |
1086 | break; |
1087 | case EXC_SOFTWARE: | |
bb00b29d | 1088 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 1089 | { |
bb00b29d | 1090 | status->value.sig = |
2ea28649 | 1091 | gdb_signal_from_host (thread->event.ex_data[1]); |
bb00b29d TG |
1092 | inferior_debug (5, _(" (signal %d: %s)\n"), |
1093 | thread->event.ex_data[1], | |
2ea28649 | 1094 | gdb_signal_to_name (status->value.sig)); |
bb00b29d TG |
1095 | |
1096 | /* If the thread is stopped because it has received a signal | |
1097 | that gdb has just sent, continue. */ | |
1098 | if (thread->signaled) | |
1099 | { | |
1100 | thread->signaled = 0; | |
1101 | darwin_send_reply (inf, thread); | |
1102 | thread->msg_state = DARWIN_RUNNING; | |
1103 | status->kind = TARGET_WAITKIND_IGNORE; | |
1104 | } | |
a80b95ba TG |
1105 | } |
1106 | else | |
4e225075 | 1107 | status->value.sig = GDB_EXC_SOFTWARE; |
a80b95ba TG |
1108 | break; |
1109 | case EXC_BREAKPOINT: | |
1110 | /* Many internal GDB routines expect breakpoints to be reported | |
4e225075 | 1111 | as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT |
0963b4bd | 1112 | as a spurious signal. */ |
a493e3e2 | 1113 | status->value.sig = GDB_SIGNAL_TRAP; |
a80b95ba TG |
1114 | break; |
1115 | default: | |
a493e3e2 | 1116 | status->value.sig = GDB_SIGNAL_UNKNOWN; |
a80b95ba TG |
1117 | break; |
1118 | } | |
1119 | ||
bb00b29d TG |
1120 | return ptid_build (inf->pid, 0, thread->gdb_port); |
1121 | } | |
a41f2563 | 1122 | else if (hdr->msgh_id == 0x48) |
bb00b29d | 1123 | { |
a41f2563 | 1124 | /* MACH_NOTIFY_DEAD_NAME: notification for exit. */ |
82b19a4d TG |
1125 | int res; |
1126 | ||
1127 | res = darwin_decode_notify_message (hdr, &inf); | |
1128 | ||
1129 | if (res < 0) | |
1130 | { | |
1131 | /* Should not happen... */ | |
1132 | printf_unfiltered | |
1133 | (_("darwin_wait: ill-formatted message (id=0x%x, res=%d)\n"), | |
1134 | hdr->msgh_id, res); | |
1135 | } | |
1136 | ||
a41f2563 TG |
1137 | *pinf = NULL; |
1138 | *pthread = NULL; | |
bb00b29d | 1139 | |
82b19a4d TG |
1140 | if (res < 0 || inf == NULL) |
1141 | { | |
1142 | status->kind = TARGET_WAITKIND_IGNORE; | |
1143 | return minus_one_ptid; | |
1144 | } | |
1145 | ||
a41f2563 TG |
1146 | if (inf != NULL) |
1147 | { | |
fe978cb0 | 1148 | if (!inf->priv->no_ptrace) |
bb00b29d | 1149 | { |
a41f2563 TG |
1150 | pid_t res; |
1151 | int wstatus; | |
1152 | ||
1153 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
1154 | if (res < 0 || res != inf->pid) | |
1155 | { | |
1156 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
1157 | res, safe_strerror (errno)); | |
1158 | status->kind = TARGET_WAITKIND_IGNORE; | |
1159 | return minus_one_ptid; | |
1160 | } | |
1161 | if (WIFEXITED (wstatus)) | |
1162 | { | |
1163 | status->kind = TARGET_WAITKIND_EXITED; | |
1164 | status->value.integer = WEXITSTATUS (wstatus); | |
1165 | } | |
1166 | else | |
1167 | { | |
1168 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
5ae00552 | 1169 | status->value.sig = gdb_signal_from_host (WTERMSIG (wstatus)); |
a41f2563 TG |
1170 | } |
1171 | ||
1172 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"), | |
1173 | res, wstatus); | |
1174 | ||
1175 | /* Looks necessary on Leopard and harmless... */ | |
1176 | wait4 (inf->pid, &wstatus, 0, NULL); | |
1177 | ||
82b19a4d TG |
1178 | inferior_ptid = ptid_build (inf->pid, 0, 0); |
1179 | return inferior_ptid; | |
bb00b29d TG |
1180 | } |
1181 | else | |
1182 | { | |
a41f2563 TG |
1183 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
1184 | status->kind = TARGET_WAITKIND_EXITED; | |
1185 | status->value.integer = 0; /* Don't know. */ | |
1186 | return ptid_build (inf->pid, 0, 0); | |
bb00b29d | 1187 | } |
bb00b29d TG |
1188 | } |
1189 | } | |
1190 | ||
a41f2563 | 1191 | /* Unknown message. */ |
86ad98c3 | 1192 | warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id); |
a41f2563 | 1193 | status->kind = TARGET_WAITKIND_IGNORE; |
bb00b29d TG |
1194 | return minus_one_ptid; |
1195 | } | |
1196 | ||
1197 | static int | |
1198 | cancel_breakpoint (ptid_t ptid) | |
1199 | { | |
0963b4bd | 1200 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1201 | the current event, eventually we will resume this thread, and this |
1202 | breakpoint will trap again. | |
1203 | ||
1204 | If we do not do this, then we run the risk that the user will | |
1205 | delete or disable the breakpoint, but the thread will have already | |
1206 | tripped on it. */ | |
1207 | ||
1208 | struct regcache *regcache = get_thread_regcache (ptid); | |
1209 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1210 | CORE_ADDR pc; | |
a80b95ba | 1211 | |
527a273a | 1212 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
40625c9d | 1213 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc)) |
bb00b29d | 1214 | { |
3eb831e0 TG |
1215 | inferior_debug (4, "cancel_breakpoint for thread 0x%lx\n", |
1216 | (unsigned long) ptid_get_tid (ptid)); | |
bb00b29d TG |
1217 | |
1218 | /* Back up the PC if necessary. */ | |
527a273a | 1219 | if (gdbarch_decr_pc_after_break (gdbarch)) |
bb00b29d TG |
1220 | regcache_write_pc (regcache, pc); |
1221 | ||
1222 | return 1; | |
a80b95ba | 1223 | } |
bb00b29d TG |
1224 | return 0; |
1225 | } | |
1226 | ||
1227 | static ptid_t | |
1228 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1229 | { | |
1230 | kern_return_t kret; | |
1231 | union | |
1232 | { | |
1233 | mach_msg_header_t hdr; | |
1234 | char data[0x100]; | |
1235 | } msgin; | |
1236 | mach_msg_header_t *hdr = &msgin.hdr; | |
1237 | ptid_t res; | |
1238 | darwin_thread_t *thread; | |
1239 | struct inferior *inf; | |
1240 | ||
1241 | inferior_debug | |
1242 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
1243 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
1244 | ||
1245 | /* Handle fake stop events at first. */ | |
1246 | if (darwin_inf_fake_stop != NULL) | |
1247 | { | |
1248 | inf = darwin_inf_fake_stop; | |
1249 | darwin_inf_fake_stop = NULL; | |
1250 | ||
1251 | status->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 1252 | status->value.sig = GDB_SIGNAL_TRAP; |
fe978cb0 | 1253 | thread = VEC_index (darwin_thread_t, inf->priv->threads, 0); |
bb00b29d TG |
1254 | thread->msg_state = DARWIN_STOPPED; |
1255 | return ptid_build (inf->pid, 0, thread->gdb_port); | |
1256 | } | |
1257 | ||
1258 | do | |
1259 | { | |
1260 | /* set_sigint_trap (); */ | |
1261 | ||
1262 | /* Wait for a message. */ | |
1263 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1264 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1265 | ||
1266 | /* clear_sigint_trap (); */ | |
1267 | ||
1268 | if (kret == MACH_RCV_INTERRUPTED) | |
1269 | { | |
1270 | status->kind = TARGET_WAITKIND_IGNORE; | |
1271 | return minus_one_ptid; | |
1272 | } | |
1273 | ||
1274 | if (kret != MACH_MSG_SUCCESS) | |
1275 | { | |
c8c9911f | 1276 | inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret); |
bb00b29d TG |
1277 | status->kind = TARGET_WAITKIND_SPURIOUS; |
1278 | return minus_one_ptid; | |
1279 | } | |
1280 | ||
1281 | /* Debug: display message. */ | |
1282 | if (darwin_debug_flag > 10) | |
1283 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1284 | ||
1285 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
a41f2563 TG |
1286 | if (ptid_equal (res, minus_one_ptid)) |
1287 | continue; | |
bb00b29d | 1288 | |
a41f2563 | 1289 | /* Early return in case an inferior has exited. */ |
bb00b29d TG |
1290 | if (inf == NULL) |
1291 | return res; | |
1292 | } | |
1293 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1294 | ||
1295 | /* Stop all tasks. */ | |
1296 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1297 | ||
1298 | /* Read pending messages. */ | |
1299 | while (1) | |
a80b95ba | 1300 | { |
bb00b29d TG |
1301 | struct target_waitstatus status2; |
1302 | ptid_t ptid2; | |
1303 | ||
1304 | kret = mach_msg (&msgin.hdr, | |
1305 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1306 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1307 | ||
1308 | if (kret == MACH_RCV_TIMED_OUT) | |
1309 | break; | |
1310 | if (kret != MACH_MSG_SUCCESS) | |
1311 | { | |
1312 | inferior_debug | |
c8c9911f | 1313 | (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret); |
bb00b29d TG |
1314 | break; |
1315 | } | |
1316 | ||
a41f2563 TG |
1317 | /* Debug: display message. */ |
1318 | if (darwin_debug_flag > 10) | |
1319 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1320 | ||
bb00b29d | 1321 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); |
a80b95ba | 1322 | |
bb00b29d TG |
1323 | if (inf != NULL && thread != NULL |
1324 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1325 | { |
bb00b29d TG |
1326 | if (thread->single_step |
1327 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) | |
1328 | { | |
1329 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1330 | darwin_send_reply (inf, thread); | |
1331 | thread->msg_state = DARWIN_RUNNING; | |
1332 | } | |
1333 | else | |
1334 | inferior_debug | |
c8c9911f | 1335 | (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"), |
bb00b29d | 1336 | thread->gdb_port); |
a80b95ba | 1337 | } |
bb00b29d TG |
1338 | else |
1339 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1340 | } | |
1341 | return res; | |
1342 | } | |
a80b95ba | 1343 | |
bb00b29d | 1344 | static ptid_t |
a6290449 | 1345 | darwin_wait_to (struct target_ops *ops, |
bb00b29d TG |
1346 | ptid_t ptid, struct target_waitstatus *status, int options) |
1347 | { | |
1348 | return darwin_wait (ptid, status); | |
1349 | } | |
a80b95ba | 1350 | |
bb00b29d | 1351 | static void |
bfedc46a | 1352 | darwin_interrupt (struct target_ops *self, ptid_t t) |
bb00b29d TG |
1353 | { |
1354 | struct inferior *inf = current_inferior (); | |
a80b95ba | 1355 | |
bb00b29d | 1356 | /* FIXME: handle in no_ptrace mode. */ |
fe978cb0 | 1357 | gdb_assert (!inf->priv->no_ptrace); |
bb00b29d | 1358 | kill (inf->pid, SIGINT); |
a80b95ba TG |
1359 | } |
1360 | ||
82b19a4d TG |
1361 | /* Deallocate threads port and vector. */ |
1362 | ||
a80b95ba | 1363 | static void |
82b19a4d | 1364 | darwin_deallocate_threads (struct inferior *inf) |
a80b95ba | 1365 | { |
fe978cb0 | 1366 | if (inf->priv->threads) |
a80b95ba | 1367 | { |
82b19a4d | 1368 | kern_return_t kret; |
a80b95ba | 1369 | int k; |
bb00b29d TG |
1370 | darwin_thread_t *t; |
1371 | for (k = 0; | |
fe978cb0 | 1372 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d | 1373 | k++) |
a80b95ba | 1374 | { |
bb00b29d | 1375 | kret = mach_port_deallocate (gdb_task, t->gdb_port); |
a80b95ba TG |
1376 | MACH_CHECK_ERROR (kret); |
1377 | } | |
fe978cb0 PA |
1378 | VEC_free (darwin_thread_t, inf->priv->threads); |
1379 | inf->priv->threads = NULL; | |
a80b95ba | 1380 | } |
82b19a4d | 1381 | } |
a80b95ba | 1382 | |
82b19a4d TG |
1383 | static void |
1384 | darwin_mourn_inferior (struct target_ops *ops) | |
1385 | { | |
1386 | struct inferior *inf = current_inferior (); | |
1387 | kern_return_t kret; | |
1388 | mach_port_t prev; | |
1389 | int i; | |
1390 | ||
1391 | /* Deallocate threads. */ | |
1392 | darwin_deallocate_threads (inf); | |
1393 | ||
1394 | /* Remove notify_port from darwin_port_set. */ | |
bb00b29d | 1395 | kret = mach_port_move_member (gdb_task, |
fe978cb0 | 1396 | inf->priv->notify_port, MACH_PORT_NULL); |
fda184b6 | 1397 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1398 | |
82b19a4d | 1399 | /* Remove task port dead_name notification. */ |
fe978cb0 | 1400 | kret = mach_port_request_notification (gdb_task, inf->priv->task, |
a80b95ba | 1401 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1402 | MACH_PORT_NULL, |
a80b95ba TG |
1403 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1404 | &prev); | |
1405 | /* This can fail if the task is dead. */ | |
c8c9911f | 1406 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
fe978cb0 | 1407 | inf->priv->task, prev, inf->priv->notify_port); |
bb00b29d | 1408 | |
a80b95ba TG |
1409 | if (kret == KERN_SUCCESS) |
1410 | { | |
1411 | kret = mach_port_deallocate (gdb_task, prev); | |
1412 | MACH_CHECK_ERROR (kret); | |
1413 | } | |
1414 | ||
82b19a4d | 1415 | /* Destroy notify_port. */ |
fe978cb0 | 1416 | kret = mach_port_destroy (gdb_task, inf->priv->notify_port); |
bb00b29d TG |
1417 | MACH_CHECK_ERROR (kret); |
1418 | ||
a80b95ba | 1419 | /* Deallocate saved exception ports. */ |
82b19a4d | 1420 | darwin_deallocate_exception_ports (inf->priv); |
a80b95ba | 1421 | |
82b19a4d | 1422 | /* Deallocate task port. */ |
fe978cb0 | 1423 | kret = mach_port_deallocate (gdb_task, inf->priv->task); |
a80b95ba TG |
1424 | MACH_CHECK_ERROR (kret); |
1425 | ||
fe978cb0 PA |
1426 | xfree (inf->priv); |
1427 | inf->priv = NULL; | |
a80b95ba | 1428 | |
c1ee2fb3 | 1429 | inf_child_mourn_inferior (ops); |
a80b95ba TG |
1430 | } |
1431 | ||
1432 | static void | |
bb00b29d | 1433 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1434 | { |
bb00b29d TG |
1435 | int k; |
1436 | darwin_thread_t *t; | |
a80b95ba | 1437 | |
bb00b29d | 1438 | for (k = 0; |
fe978cb0 | 1439 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
1440 | k++) |
1441 | { | |
1442 | if (t->msg_state == DARWIN_MESSAGE) | |
1443 | darwin_resume_thread (inf, t, 0, 0); | |
1444 | } | |
a80b95ba TG |
1445 | } |
1446 | ||
1447 | static void | |
bb00b29d | 1448 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1449 | { |
1450 | struct target_waitstatus wstatus; | |
1451 | ptid_t ptid; | |
1452 | kern_return_t kret; | |
1453 | int status; | |
1454 | int res; | |
1455 | ||
bb00b29d | 1456 | gdb_assert (inf != NULL); |
a80b95ba | 1457 | |
bb00b29d | 1458 | darwin_suspend_inferior (inf); |
a80b95ba | 1459 | |
bb00b29d | 1460 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1461 | |
fe978cb0 | 1462 | if (inf->priv->no_ptrace) |
bb00b29d | 1463 | return; |
a80b95ba | 1464 | |
bb00b29d TG |
1465 | res = kill (inf->pid, SIGSTOP); |
1466 | if (res != 0) | |
b37520b6 | 1467 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1468 | |
bb00b29d TG |
1469 | /* Wait until the process is really stopped. */ |
1470 | while (1) | |
a80b95ba | 1471 | { |
bb00b29d TG |
1472 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1473 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 1474 | && wstatus.value.sig == GDB_SIGNAL_STOP) |
bb00b29d | 1475 | break; |
a80b95ba TG |
1476 | } |
1477 | } | |
1478 | ||
1479 | static kern_return_t | |
1480 | darwin_save_exception_ports (darwin_inferior *inf) | |
1481 | { | |
1482 | kern_return_t kret; | |
1483 | ||
1484 | inf->exception_info.count = | |
1485 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1486 | ||
1487 | kret = task_get_exception_ports | |
1488 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1489 | &inf->exception_info.count, inf->exception_info.ports, | |
1490 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1491 | return kret; | |
1492 | } | |
1493 | ||
1494 | static kern_return_t | |
1495 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1496 | { | |
1497 | int i; | |
1498 | kern_return_t kret; | |
1499 | ||
1500 | for (i = 0; i < inf->exception_info.count; i++) | |
1501 | { | |
1502 | kret = task_set_exception_ports | |
1503 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1504 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1505 | if (kret != KERN_SUCCESS) | |
1506 | return kret; | |
1507 | } | |
1508 | ||
1509 | return KERN_SUCCESS; | |
1510 | } | |
1511 | ||
82b19a4d TG |
1512 | /* Deallocate saved exception ports. */ |
1513 | ||
1514 | static void | |
1515 | darwin_deallocate_exception_ports (darwin_inferior *inf) | |
1516 | { | |
1517 | int i; | |
1518 | kern_return_t kret; | |
1519 | ||
1520 | for (i = 0; i < inf->exception_info.count; i++) | |
1521 | { | |
1522 | kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]); | |
1523 | MACH_CHECK_ERROR (kret); | |
1524 | } | |
1525 | inf->exception_info.count = 0; | |
1526 | } | |
1527 | ||
1528 | static void | |
1529 | darwin_setup_exceptions (struct inferior *inf) | |
1530 | { | |
1531 | kern_return_t kret; | |
1532 | int traps_expected; | |
1533 | exception_mask_t mask; | |
1534 | ||
1535 | kret = darwin_save_exception_ports (inf->priv); | |
1536 | if (kret != KERN_SUCCESS) | |
1537 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1538 | "returned: %d"), | |
1539 | kret); | |
1540 | ||
1541 | /* Set exception port. */ | |
1542 | if (enable_mach_exceptions) | |
1543 | mask = EXC_MASK_ALL; | |
1544 | else | |
1545 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
1546 | kret = task_set_exception_ports (inf->priv->task, mask, darwin_ex_port, | |
1547 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); | |
1548 | if (kret != KERN_SUCCESS) | |
1549 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1550 | "returned: %d"), | |
1551 | kret); | |
1552 | } | |
1553 | ||
a80b95ba | 1554 | static void |
bb00b29d TG |
1555 | darwin_kill_inferior (struct target_ops *ops) |
1556 | { | |
1557 | struct inferior *inf = current_inferior (); | |
1558 | struct target_waitstatus wstatus; | |
1559 | ptid_t ptid; | |
1560 | kern_return_t kret; | |
1561 | int status; | |
1562 | int res; | |
1563 | ||
1564 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1565 | return; | |
1566 | ||
1567 | gdb_assert (inf != NULL); | |
1568 | ||
fe978cb0 | 1569 | kret = darwin_restore_exception_ports (inf->priv); |
ee41036f | 1570 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1571 | |
ee41036f | 1572 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1573 | |
ee41036f | 1574 | res = kill (inf->pid, 9); |
bb00b29d | 1575 | |
ee41036f | 1576 | if (res == 0) |
bb00b29d | 1577 | { |
bb00b29d | 1578 | darwin_resume_inferior (inf); |
a6290449 | 1579 | |
bb00b29d TG |
1580 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1581 | } | |
ee41036f TG |
1582 | else if (errno != ESRCH) |
1583 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1584 | inf->pid, safe_strerror (errno)); | |
bb00b29d | 1585 | |
bc1e6c81 | 1586 | target_mourn_inferior (inferior_ptid); |
bb00b29d TG |
1587 | } |
1588 | ||
82b19a4d TG |
1589 | static void |
1590 | darwin_setup_request_notification (struct inferior *inf) | |
1591 | { | |
1592 | kern_return_t kret; | |
1593 | mach_port_t prev_not; | |
1594 | ||
1595 | kret = mach_port_request_notification (gdb_task, inf->priv->task, | |
1596 | MACH_NOTIFY_DEAD_NAME, 0, | |
1597 | inf->priv->notify_port, | |
1598 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
1599 | &prev_not); | |
1600 | if (kret != KERN_SUCCESS) | |
1601 | error (_("Termination notification request failed, " | |
1602 | "mach_port_request_notification\n" | |
1603 | "returned: %d"), | |
1604 | kret); | |
1605 | if (prev_not != MACH_PORT_NULL) | |
1606 | { | |
1607 | /* This is unexpected, as there should not be any previously | |
1608 | registered notification request. But this is not a fatal | |
1609 | issue, so just emit a warning. */ | |
1610 | warning (_("\ | |
1611 | A task termination request was registered before the debugger registered\n\ | |
1612 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1613 | impact on the debugging session.")); | |
1614 | } | |
1615 | } | |
1616 | ||
bb00b29d TG |
1617 | static void |
1618 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1619 | { |
a80b95ba TG |
1620 | kern_return_t kret; |
1621 | mach_port_t prev_port; | |
1622 | int traps_expected; | |
bb00b29d | 1623 | mach_port_t prev_not; |
a80b95ba TG |
1624 | exception_mask_t mask; |
1625 | ||
fe978cb0 | 1626 | inf->priv = XCNEW (darwin_inferior); |
bb00b29d | 1627 | |
fe978cb0 | 1628 | kret = task_for_pid (gdb_task, inf->pid, &inf->priv->task); |
a80b95ba TG |
1629 | if (kret != KERN_SUCCESS) |
1630 | { | |
1631 | int status; | |
a80b95ba TG |
1632 | |
1633 | if (!inf->attach_flag) | |
1634 | { | |
bb00b29d TG |
1635 | kill (inf->pid, 9); |
1636 | waitpid (inf->pid, &status, 0); | |
a80b95ba TG |
1637 | } |
1638 | ||
1639 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
15c19d39 | 1640 | " (please check gdb is codesigned - see taskgated(8))"), |
bb00b29d | 1641 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
a80b95ba TG |
1642 | } |
1643 | ||
bb00b29d | 1644 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
fe978cb0 | 1645 | inf->priv->task, inf->pid); |
a80b95ba TG |
1646 | |
1647 | if (darwin_ex_port == MACH_PORT_NULL) | |
1648 | { | |
1649 | /* Create a port to get exceptions. */ | |
1650 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1651 | &darwin_ex_port); | |
fda184b6 JB |
1652 | if (kret != KERN_SUCCESS) |
1653 | error (_("Unable to create exception port, mach_port_allocate " | |
1654 | "returned: %d"), | |
1655 | kret); | |
a80b95ba TG |
1656 | |
1657 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, | |
1658 | MACH_MSG_TYPE_MAKE_SEND); | |
fda184b6 JB |
1659 | if (kret != KERN_SUCCESS) |
1660 | error (_("Unable to create exception port, mach_port_insert_right " | |
1661 | "returned: %d"), | |
1662 | kret); | |
a80b95ba TG |
1663 | |
1664 | /* Create a port set and put ex_port in it. */ | |
1665 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1666 | &darwin_port_set); | |
fda184b6 JB |
1667 | if (kret != KERN_SUCCESS) |
1668 | error (_("Unable to create port set, mach_port_allocate " | |
1669 | "returned: %d"), | |
1670 | kret); | |
a80b95ba TG |
1671 | |
1672 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); | |
fda184b6 JB |
1673 | if (kret != KERN_SUCCESS) |
1674 | error (_("Unable to move exception port into new port set, " | |
1675 | "mach_port_move_member\n" | |
1676 | "returned: %d"), | |
1677 | kret); | |
bb00b29d | 1678 | } |
a80b95ba | 1679 | |
bb00b29d TG |
1680 | /* Create a port to be notified when the child task terminates. */ |
1681 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
fe978cb0 | 1682 | &inf->priv->notify_port); |
fda184b6 JB |
1683 | if (kret != KERN_SUCCESS) |
1684 | error (_("Unable to create notification port, mach_port_allocate " | |
1685 | "returned: %d"), | |
1686 | kret); | |
a80b95ba | 1687 | |
bb00b29d | 1688 | kret = mach_port_move_member (gdb_task, |
fe978cb0 | 1689 | inf->priv->notify_port, darwin_port_set); |
fda184b6 JB |
1690 | if (kret != KERN_SUCCESS) |
1691 | error (_("Unable to move notification port into new port set, " | |
1692 | "mach_port_move_member\n" | |
1693 | "returned: %d"), | |
1694 | kret); | |
a80b95ba | 1695 | |
82b19a4d | 1696 | darwin_setup_request_notification (inf); |
a80b95ba | 1697 | |
82b19a4d | 1698 | darwin_setup_exceptions (inf); |
a80b95ba | 1699 | |
6a3cb8e8 PA |
1700 | if (!target_is_pushed (darwin_ops)) |
1701 | push_target (darwin_ops); | |
a80b95ba TG |
1702 | } |
1703 | ||
1704 | static void | |
bb00b29d | 1705 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1706 | { |
bb00b29d TG |
1707 | darwin_thread_t *thread; |
1708 | ptid_t new_ptid; | |
a80b95ba TG |
1709 | |
1710 | darwin_check_new_threads (inf); | |
1711 | ||
fe978cb0 PA |
1712 | gdb_assert (inf->priv->threads |
1713 | && VEC_length (darwin_thread_t, inf->priv->threads) > 0); | |
1714 | thread = VEC_index (darwin_thread_t, inf->priv->threads, 0); | |
bb00b29d TG |
1715 | |
1716 | /* Note: fork_inferior automatically add a thead but it uses a wrong ptid. | |
1717 | Fix up. */ | |
1718 | new_ptid = ptid_build (inf->pid, 0, thread->gdb_port); | |
1719 | thread_change_ptid (inferior_ptid, new_ptid); | |
1720 | inferior_ptid = new_ptid; | |
1721 | } | |
1722 | ||
1723 | /* The child must synchronize with gdb: gdb must set the exception port | |
1724 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1725 | FIXME: is there a lighter way ? */ | |
1726 | static int ptrace_fds[2]; | |
1727 | ||
1728 | static void | |
1729 | darwin_ptrace_me (void) | |
1730 | { | |
1731 | int res; | |
1732 | char c; | |
1733 | ||
1734 | /* Close write end point. */ | |
0db8980c SDJ |
1735 | if (close (ptrace_fds[1]) < 0) |
1736 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1737 | |
1738 | /* Wait until gdb is ready. */ | |
1739 | res = read (ptrace_fds[0], &c, 1); | |
fda184b6 | 1740 | if (res != 0) |
0db8980c SDJ |
1741 | trace_start_error (_("unable to read from pipe, read returned: %d"), res); |
1742 | ||
1743 | if (close (ptrace_fds[0]) < 0) | |
1744 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1745 | |
1746 | /* Get rid of privileges. */ | |
0db8980c SDJ |
1747 | if (setegid (getgid ()) < 0) |
1748 | trace_start_error_with_name ("setegid"); | |
bb00b29d TG |
1749 | |
1750 | /* Set TRACEME. */ | |
0db8980c SDJ |
1751 | if (PTRACE (PT_TRACE_ME, 0, 0, 0) < 0) |
1752 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1753 | |
1754 | /* Redirect signals to exception port. */ | |
0db8980c SDJ |
1755 | if (PTRACE (PT_SIGEXC, 0, 0, 0) < 0) |
1756 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1757 | } |
1758 | ||
1759 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1760 | static void | |
1761 | darwin_pre_ptrace (void) | |
1762 | { | |
1763 | if (pipe (ptrace_fds) != 0) | |
1764 | { | |
1765 | ptrace_fds[0] = -1; | |
1766 | ptrace_fds[1] = -1; | |
1767 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1768 | } | |
21ff4686 TT |
1769 | |
1770 | mark_fd_no_cloexec (ptrace_fds[0]); | |
1771 | mark_fd_no_cloexec (ptrace_fds[1]); | |
a80b95ba TG |
1772 | } |
1773 | ||
1774 | static void | |
1775 | darwin_ptrace_him (int pid) | |
1776 | { | |
1777 | task_t itask; | |
1778 | kern_return_t kret; | |
1779 | mach_port_t prev_port; | |
1780 | int traps_expected; | |
bb00b29d | 1781 | struct inferior *inf = current_inferior (); |
a80b95ba | 1782 | |
bb00b29d | 1783 | darwin_attach_pid (inf); |
a80b95ba TG |
1784 | |
1785 | /* Let's the child run. */ | |
1786 | close (ptrace_fds[0]); | |
1787 | close (ptrace_fds[1]); | |
1788 | ||
21ff4686 TT |
1789 | unmark_fd_no_cloexec (ptrace_fds[0]); |
1790 | unmark_fd_no_cloexec (ptrace_fds[1]); | |
1791 | ||
bb00b29d TG |
1792 | darwin_init_thread_list (inf); |
1793 | ||
2090129c | 1794 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
a80b95ba TG |
1795 | } |
1796 | ||
e69860f1 TG |
1797 | static void |
1798 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1799 | { | |
1800 | posix_spawnattr_t attr; | |
1801 | short ps_flags = 0; | |
f00c55f8 | 1802 | int res; |
e69860f1 | 1803 | |
f00c55f8 TG |
1804 | res = posix_spawnattr_init (&attr); |
1805 | if (res != 0) | |
e69860f1 TG |
1806 | { |
1807 | fprintf_unfiltered | |
1808 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); | |
1809 | return; | |
1810 | } | |
1811 | ||
1812 | /* Do like execve: replace the image. */ | |
1813 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1814 | ||
1815 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1816 | kernel include files. */ | |
1817 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1818 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1819 | #endif | |
1820 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1821 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1822 | if (res != 0) | |
e69860f1 | 1823 | { |
f00c55f8 | 1824 | fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1825 | return; |
1826 | } | |
1827 | ||
1828 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1829 | } | |
1830 | ||
a80b95ba | 1831 | static void |
7c5ded6a SDJ |
1832 | darwin_create_inferior (struct target_ops *ops, |
1833 | const char *exec_file, | |
1834 | const std::string &allargs, | |
1835 | char **env, int from_tty) | |
a80b95ba | 1836 | { |
2090129c SDJ |
1837 | pid_t pid; |
1838 | ptid_t ptid; | |
1839 | ||
a80b95ba | 1840 | /* Do the hard work. */ |
2090129c SDJ |
1841 | pid = fork_inferior (exec_file, allargs, env, darwin_ptrace_me, |
1842 | darwin_ptrace_him, darwin_pre_ptrace, NULL, | |
1843 | darwin_execvp); | |
bb00b29d | 1844 | |
2090129c | 1845 | ptid = pid_to_ptid (pid); |
a80b95ba TG |
1846 | /* Return now in case of error. */ |
1847 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1848 | return; | |
2090129c SDJ |
1849 | |
1850 | /* We have something that executes now. We'll be running through | |
1851 | the shell at this point (if startup-with-shell is true), but the | |
1852 | pid shouldn't change. */ | |
1853 | add_thread_silent (ptid); | |
a80b95ba TG |
1854 | } |
1855 | \f | |
1856 | ||
726ce67c JB |
1857 | /* Set things up such that the next call to darwin_wait will immediately |
1858 | return a fake stop event for inferior INF. | |
1859 | ||
1860 | This assumes that the inferior's thread list has been initialized, | |
1861 | as it will suspend the inferior's first thread. */ | |
1862 | ||
1863 | static void | |
1864 | darwin_setup_fake_stop_event (struct inferior *inf) | |
1865 | { | |
1866 | darwin_thread_t *thread; | |
1867 | kern_return_t kret; | |
1868 | ||
1869 | gdb_assert (darwin_inf_fake_stop == NULL); | |
1870 | darwin_inf_fake_stop = inf; | |
1871 | ||
1872 | /* When detecting a fake pending stop event, darwin_wait returns | |
1873 | an event saying that the first thread is in a DARWIN_STOPPED | |
1874 | state. To make that accurate, we need to suspend that thread | |
1875 | as well. Otherwise, we'll try resuming it when resuming the | |
1876 | inferior, and get a warning because the thread's suspend count | |
1877 | is already zero, making the resume request useless. */ | |
fe978cb0 | 1878 | thread = VEC_index (darwin_thread_t, inf->priv->threads, 0); |
726ce67c JB |
1879 | kret = thread_suspend (thread->gdb_port); |
1880 | MACH_CHECK_ERROR (kret); | |
1881 | } | |
1882 | ||
a80b95ba TG |
1883 | /* Attach to process PID, then initialize for debugging it |
1884 | and wait for the trace-trap that results from attaching. */ | |
1885 | static void | |
c0939df1 | 1886 | darwin_attach (struct target_ops *ops, const char *args, int from_tty) |
a80b95ba TG |
1887 | { |
1888 | pid_t pid; | |
1889 | pid_t pid2; | |
1890 | int wstatus; | |
1891 | int res; | |
1892 | struct inferior *inf; | |
bb00b29d | 1893 | kern_return_t kret; |
a80b95ba | 1894 | |
74164c56 | 1895 | pid = parse_pid_to_attach (args); |
a80b95ba | 1896 | |
74164c56 | 1897 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1898 | error (_("I refuse to debug myself!")); |
1899 | ||
1900 | if (from_tty) | |
bb00b29d TG |
1901 | { |
1902 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1903 | |
bb00b29d TG |
1904 | if (exec_file) |
1905 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
1906 | target_pid_to_str (pid_to_ptid (pid))); | |
1907 | else | |
1908 | printf_unfiltered (_("Attaching to %s\n"), | |
1909 | target_pid_to_str (pid_to_ptid (pid))); | |
1910 | ||
1911 | gdb_flush (gdb_stdout); | |
1912 | } | |
1913 | ||
1914 | if (pid == 0 || kill (pid, 0) < 0) | |
1915 | error (_("Can't attach to process %d: %s (%d)"), | |
1916 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1917 | |
bb00b29d | 1918 | inferior_ptid = pid_to_ptid (pid); |
6c95b8df PA |
1919 | inf = current_inferior (); |
1920 | inferior_appeared (inf, pid); | |
a80b95ba | 1921 | inf->attach_flag = 1; |
6c95b8df | 1922 | |
bb00b29d TG |
1923 | /* Always add a main thread. */ |
1924 | add_thread_silent (inferior_ptid); | |
a80b95ba | 1925 | |
bb00b29d | 1926 | darwin_attach_pid (inf); |
a80b95ba | 1927 | |
bb00b29d | 1928 | darwin_suspend_inferior (inf); |
a80b95ba | 1929 | |
bb00b29d | 1930 | darwin_init_thread_list (inf); |
a80b95ba | 1931 | |
fe978cb0 | 1932 | darwin_check_osabi (inf->priv, ptid_get_tid (inferior_ptid)); |
a80b95ba | 1933 | |
726ce67c JB |
1934 | darwin_setup_fake_stop_event (inf); |
1935 | ||
fe978cb0 | 1936 | inf->priv->no_ptrace = 1; |
a80b95ba TG |
1937 | } |
1938 | ||
1939 | /* Take a program previously attached to and detaches it. | |
1940 | The program resumes execution and will no longer stop | |
1941 | on signals, etc. We'd better not have left any breakpoints | |
1942 | in the program or it'll die when it hits one. For this | |
1943 | to work, it may be necessary for the process to have been | |
1944 | previously attached. It *might* work if the program was | |
1945 | started via fork. */ | |
1946 | static void | |
52554a0e | 1947 | darwin_detach (struct target_ops *ops, const char *args, int from_tty) |
a80b95ba | 1948 | { |
bb00b29d TG |
1949 | pid_t pid = ptid_get_pid (inferior_ptid); |
1950 | struct inferior *inf = current_inferior (); | |
a80b95ba TG |
1951 | kern_return_t kret; |
1952 | int res; | |
1953 | ||
bb00b29d | 1954 | /* Display message. */ |
0f48b757 | 1955 | target_announce_detach (from_tty); |
a80b95ba | 1956 | |
bb00b29d | 1957 | /* If ptrace() is in use, stop the process. */ |
fe978cb0 | 1958 | if (!inf->priv->no_ptrace) |
bb00b29d | 1959 | darwin_stop_inferior (inf); |
a80b95ba | 1960 | |
fe978cb0 | 1961 | kret = darwin_restore_exception_ports (inf->priv); |
a80b95ba TG |
1962 | MACH_CHECK_ERROR (kret); |
1963 | ||
fe978cb0 | 1964 | if (!inf->priv->no_ptrace) |
a80b95ba | 1965 | { |
bb00b29d TG |
1966 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1967 | if (res != 0) | |
1968 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1969 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1970 | } |
1971 | ||
bb00b29d | 1972 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1973 | |
5e9bc145 JB |
1974 | /* When using ptrace, we have just performed a PT_DETACH, which |
1975 | resumes the inferior. On the other hand, when we are not using | |
1976 | ptrace, we need to resume its execution ourselves. */ | |
fe978cb0 | 1977 | if (inf->priv->no_ptrace) |
5e9bc145 | 1978 | darwin_resume_inferior (inf); |
a80b95ba TG |
1979 | |
1980 | darwin_mourn_inferior (ops); | |
1981 | } | |
1982 | ||
1983 | static void | |
1984 | darwin_files_info (struct target_ops *ops) | |
1985 | { | |
a80b95ba TG |
1986 | } |
1987 | ||
7a114964 | 1988 | static const char * |
117de6a9 | 1989 | darwin_pid_to_str (struct target_ops *ops, ptid_t ptid) |
a80b95ba | 1990 | { |
bb00b29d TG |
1991 | static char buf[80]; |
1992 | long tid = ptid_get_tid (ptid); | |
1993 | ||
1994 | if (tid != 0) | |
1995 | { | |
1996 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
1997 | tid, ptid_get_pid (ptid)); | |
1998 | return buf; | |
1999 | } | |
a80b95ba | 2000 | |
bb00b29d | 2001 | return normal_pid_to_str (ptid); |
a80b95ba TG |
2002 | } |
2003 | ||
2004 | static int | |
28439f5e | 2005 | darwin_thread_alive (struct target_ops *ops, ptid_t ptid) |
a80b95ba TG |
2006 | { |
2007 | return 1; | |
2008 | } | |
2009 | ||
2010 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
2011 | copy it to RDADDR in gdb's address space. | |
2012 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
2013 | to ADDR in inferior task's address space. | |
f00c55f8 | 2014 | Return 0 on failure; number of bytes read / writen otherwise. */ |
3eb831e0 | 2015 | |
a80b95ba TG |
2016 | static int |
2017 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 2018 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 2019 | ULONGEST length) |
a80b95ba | 2020 | { |
bb00b29d | 2021 | kern_return_t kret; |
3eb831e0 | 2022 | mach_vm_size_t res_length = 0; |
a80b95ba | 2023 | pointer_t copied; |
b9dd1947 | 2024 | mach_msg_type_number_t copy_count; |
a80b95ba TG |
2025 | mach_vm_size_t remaining_length; |
2026 | mach_vm_address_t region_address; | |
2027 | mach_vm_size_t region_length; | |
2028 | ||
b55e14c7 YQ |
2029 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
2030 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 2031 | |
3eb831e0 TG |
2032 | /* First read. */ |
2033 | if (rdaddr != NULL) | |
a80b95ba | 2034 | { |
3eb831e0 | 2035 | mach_vm_size_t count; |
a80b95ba | 2036 | |
3eb831e0 TG |
2037 | /* According to target.h(to_xfer_partial), one and only one may be |
2038 | non-null. */ | |
2039 | gdb_assert (wraddr == NULL); | |
a80b95ba | 2040 | |
3eb831e0 TG |
2041 | kret = mach_vm_read_overwrite (task, addr, length, |
2042 | (mach_vm_address_t) rdaddr, &count); | |
2043 | if (kret != KERN_SUCCESS) | |
2044 | { | |
2045 | inferior_debug | |
2046 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
2047 | core_addr_to_string (addr), mach_error_string (kret)); | |
2048 | return 0; | |
2049 | } | |
2050 | return count; | |
2051 | } | |
a80b95ba | 2052 | |
3eb831e0 TG |
2053 | /* See above. */ |
2054 | gdb_assert (wraddr != NULL); | |
a80b95ba | 2055 | |
3eb831e0 | 2056 | while (length != 0) |
a80b95ba | 2057 | { |
3eb831e0 TG |
2058 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
2059 | mach_vm_address_t region_address = (mach_vm_address_t) (addr - offset); | |
2060 | mach_vm_size_t aligned_length = | |
2061 | (mach_vm_size_t) PAGE_ROUND (offset + length); | |
bb00b29d | 2062 | vm_region_submap_short_info_data_64_t info; |
3eb831e0 TG |
2063 | mach_msg_type_number_t count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; |
2064 | natural_t region_depth = 1000; | |
bb00b29d | 2065 | mach_vm_address_t region_start = region_address; |
3eb831e0 TG |
2066 | mach_vm_size_t region_length; |
2067 | mach_vm_size_t write_length; | |
bb00b29d | 2068 | |
3eb831e0 | 2069 | /* Read page protection. */ |
bb00b29d TG |
2070 | kret = mach_vm_region_recurse |
2071 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
2072 | (vm_region_recurse_info_t) &info, &count); | |
2073 | ||
2074 | if (kret != KERN_SUCCESS) | |
a80b95ba | 2075 | { |
bb00b29d TG |
2076 | inferior_debug (1, _("darwin_read_write_inferior: " |
2077 | "mach_vm_region_recurse failed at %s: %s\n"), | |
2078 | core_addr_to_string (region_address), | |
2079 | mach_error_string (kret)); | |
3eb831e0 | 2080 | return res_length; |
a80b95ba TG |
2081 | } |
2082 | ||
bb00b29d TG |
2083 | inferior_debug |
2084 | (9, _("darwin_read_write_inferior: " | |
2085 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
2086 | core_addr_to_string (region_address), | |
2087 | core_addr_to_string (region_start), | |
2088 | core_addr_to_string (region_length)); | |
2089 | ||
0963b4bd | 2090 | /* Check for holes in memory. */ |
bb00b29d | 2091 | if (region_start > region_address) |
a80b95ba | 2092 | { |
0963b4bd | 2093 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 2094 | core_addr_to_string (region_address), |
bb00b29d | 2095 | core_addr_to_string (region_start), |
a80b95ba | 2096 | (unsigned)region_length); |
3eb831e0 | 2097 | return res_length; |
a80b95ba TG |
2098 | } |
2099 | ||
bb00b29d TG |
2100 | /* Adjust the length. */ |
2101 | region_length -= (region_address - region_start); | |
3eb831e0 TG |
2102 | if (region_length > aligned_length) |
2103 | region_length = aligned_length; | |
bb00b29d | 2104 | |
3eb831e0 TG |
2105 | /* Make the pages RW. */ |
2106 | if (!(info.protection & VM_PROT_WRITE)) | |
a80b95ba | 2107 | { |
3eb831e0 TG |
2108 | vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE; |
2109 | ||
2110 | kret = mach_vm_protect (task, region_address, region_length, | |
2111 | FALSE, prot); | |
bb00b29d TG |
2112 | if (kret != KERN_SUCCESS) |
2113 | { | |
3eb831e0 TG |
2114 | prot |= VM_PROT_COPY; |
2115 | kret = mach_vm_protect (task, region_address, region_length, | |
2116 | FALSE, prot); | |
2117 | } | |
2118 | if (kret != KERN_SUCCESS) | |
2119 | { | |
2120 | warning (_("darwin_read_write_inferior: " | |
2121 | "mach_vm_protect failed at %s " | |
2122 | "(len=0x%lx, prot=0x%x): %s"), | |
bb00b29d | 2123 | core_addr_to_string (region_address), |
3eb831e0 | 2124 | (unsigned long) region_length, (unsigned) prot, |
bb00b29d | 2125 | mach_error_string (kret)); |
3eb831e0 | 2126 | return res_length; |
bb00b29d | 2127 | } |
a80b95ba TG |
2128 | } |
2129 | ||
3eb831e0 TG |
2130 | if (offset + length > region_length) |
2131 | write_length = region_length - offset; | |
2132 | else | |
2133 | write_length = length; | |
2134 | ||
2135 | /* Write. */ | |
2136 | kret = mach_vm_write (task, addr, (vm_offset_t) wraddr, write_length); | |
2137 | if (kret != KERN_SUCCESS) | |
2138 | { | |
2139 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
2140 | mach_error_string (kret)); | |
2141 | return res_length; | |
2142 | } | |
2143 | ||
2144 | /* Restore page rights. */ | |
a80b95ba TG |
2145 | if (!(info.protection & VM_PROT_WRITE)) |
2146 | { | |
bb00b29d | 2147 | kret = mach_vm_protect (task, region_address, region_length, |
3eb831e0 | 2148 | FALSE, info.protection); |
bb00b29d | 2149 | if (kret != KERN_SUCCESS) |
a80b95ba | 2150 | { |
3eb831e0 TG |
2151 | warning (_("darwin_read_write_inferior: " |
2152 | "mach_vm_protect restore failed at %s " | |
2153 | "(len=0x%lx): %s"), | |
bb00b29d | 2154 | core_addr_to_string (region_address), |
3eb831e0 TG |
2155 | (unsigned long) region_length, |
2156 | mach_error_string (kret)); | |
a80b95ba TG |
2157 | } |
2158 | } | |
a80b95ba | 2159 | |
3eb831e0 TG |
2160 | addr += write_length; |
2161 | wraddr += write_length; | |
2162 | res_length += write_length; | |
2163 | length -= write_length; | |
a80b95ba | 2164 | } |
3eb831e0 TG |
2165 | |
2166 | return res_length; | |
a80b95ba TG |
2167 | } |
2168 | ||
f00c55f8 | 2169 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
ad2073b0 | 2170 | to RDADDR (in big endian). |
569283d4 | 2171 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 2172 | |
b967eb24 | 2173 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 2174 | /* This is not available in Darwin 9. */ |
9b409511 | 2175 | static enum target_xfer_status |
b9dd1947 | 2176 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 2177 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
2178 | { |
2179 | struct task_dyld_info task_dyld_info; | |
2180 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
2181 | int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t); | |
2182 | kern_return_t kret; | |
2183 | ||
ad2073b0 | 2184 | if (addr != 0 || length > sizeof (mach_vm_address_t)) |
9b409511 | 2185 | return TARGET_XFER_EOF; |
f00c55f8 | 2186 | |
ad2073b0 TG |
2187 | kret = task_info (task, TASK_DYLD_INFO, |
2188 | (task_info_t) &task_dyld_info, &count); | |
f00c55f8 TG |
2189 | MACH_CHECK_ERROR (kret); |
2190 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 2191 | return TARGET_XFER_E_IO; |
ad2073b0 TG |
2192 | |
2193 | store_unsigned_integer (rdaddr, length, BFD_ENDIAN_BIG, | |
2194 | task_dyld_info.all_image_info_addr); | |
9b409511 YQ |
2195 | *xfered_len = (ULONGEST) length; |
2196 | return TARGET_XFER_OK; | |
f00c55f8 | 2197 | } |
569283d4 | 2198 | #endif |
f00c55f8 | 2199 | |
a80b95ba | 2200 | \f |
a80b95ba | 2201 | |
1b281443 | 2202 | static enum target_xfer_status |
a80b95ba TG |
2203 | darwin_xfer_partial (struct target_ops *ops, |
2204 | enum target_object object, const char *annex, | |
2205 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 2206 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
a80b95ba | 2207 | { |
bb00b29d TG |
2208 | struct inferior *inf = current_inferior (); |
2209 | ||
2210 | inferior_debug | |
b55e14c7 YQ |
2211 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
2212 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
2213 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
2214 | inf->pid); | |
a80b95ba | 2215 | |
f00c55f8 TG |
2216 | switch (object) |
2217 | { | |
2218 | case TARGET_OBJECT_MEMORY: | |
9b409511 | 2219 | { |
fe978cb0 | 2220 | int l = darwin_read_write_inferior (inf->priv->task, offset, |
9b409511 YQ |
2221 | readbuf, writebuf, len); |
2222 | ||
2223 | if (l == 0) | |
2224 | return TARGET_XFER_EOF; | |
2225 | else | |
2226 | { | |
2227 | gdb_assert (l > 0); | |
2228 | *xfered_len = (ULONGEST) l; | |
2229 | return TARGET_XFER_OK; | |
2230 | } | |
2231 | } | |
569283d4 | 2232 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
2233 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
2234 | if (writebuf != NULL || readbuf == NULL) | |
2235 | { | |
2236 | /* Support only read. */ | |
2ed4b548 | 2237 | return TARGET_XFER_E_IO; |
f00c55f8 | 2238 | } |
fe978cb0 | 2239 | return darwin_read_dyld_info (inf->priv->task, offset, readbuf, len, |
9b409511 | 2240 | xfered_len); |
569283d4 | 2241 | #endif |
f00c55f8 | 2242 | default: |
2ed4b548 | 2243 | return TARGET_XFER_E_IO; |
f00c55f8 | 2244 | } |
a80b95ba | 2245 | |
a80b95ba TG |
2246 | } |
2247 | ||
2248 | static void | |
2249 | set_enable_mach_exceptions (char *args, int from_tty, | |
2250 | struct cmd_list_element *c) | |
2251 | { | |
bb00b29d | 2252 | if (!ptid_equal (inferior_ptid, null_ptid)) |
a80b95ba | 2253 | { |
bb00b29d | 2254 | struct inferior *inf = current_inferior (); |
a80b95ba TG |
2255 | exception_mask_t mask; |
2256 | kern_return_t kret; | |
2257 | ||
2258 | if (enable_mach_exceptions) | |
2259 | mask = EXC_MASK_ALL; | |
2260 | else | |
2261 | { | |
fe978cb0 | 2262 | darwin_restore_exception_ports (inf->priv); |
bb00b29d | 2263 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
a80b95ba | 2264 | } |
fe978cb0 | 2265 | kret = task_set_exception_ports (inf->priv->task, mask, darwin_ex_port, |
a80b95ba TG |
2266 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2267 | MACH_CHECK_ERROR (kret); | |
2268 | } | |
2269 | } | |
2270 | ||
bb00b29d | 2271 | static char * |
8dd27370 | 2272 | darwin_pid_to_exec_file (struct target_ops *self, int pid) |
bb00b29d | 2273 | { |
b4ab256d | 2274 | static char path[PATH_MAX]; |
bb00b29d TG |
2275 | int res; |
2276 | ||
d8d2a3ee | 2277 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2278 | if (res >= 0) |
2279 | return path; | |
2280 | else | |
2281 | return NULL; | |
2282 | } | |
2283 | ||
2284 | static ptid_t | |
1e6b91a4 | 2285 | darwin_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) |
bb00b29d TG |
2286 | { |
2287 | int i; | |
2288 | darwin_thread_t *t; | |
2289 | int k; | |
2290 | struct inferior *inf = current_inferior (); | |
2291 | kern_return_t kret; | |
2292 | mach_port_name_array_t names; | |
2293 | mach_msg_type_number_t names_count; | |
2294 | mach_port_type_array_t types; | |
2295 | mach_msg_type_number_t types_count; | |
2296 | long res = 0; | |
2297 | ||
2298 | /* First linear search. */ | |
2299 | for (k = 0; | |
fe978cb0 | 2300 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
2301 | k++) |
2302 | if (t->inf_port == lwp) | |
2303 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); | |
2304 | ||
2305 | /* Maybe the port was never extract. Do it now. */ | |
2306 | ||
2307 | /* First get inferior port names. */ | |
fe978cb0 | 2308 | kret = mach_port_names (inf->priv->task, &names, &names_count, &types, |
bb00b29d TG |
2309 | &types_count); |
2310 | MACH_CHECK_ERROR (kret); | |
2311 | if (kret != KERN_SUCCESS) | |
2312 | return null_ptid; | |
2313 | ||
2314 | /* For each name, copy the right in the gdb space and then compare with | |
2315 | our view of the inferior threads. We don't forget to deallocate the | |
2316 | right. */ | |
2317 | for (i = 0; i < names_count; i++) | |
2318 | { | |
2319 | mach_port_t local_name; | |
2320 | mach_msg_type_name_t local_type; | |
2321 | ||
2322 | /* We just need to know the corresponding name in gdb name space. | |
2323 | So extract and deallocate the right. */ | |
fe978cb0 | 2324 | kret = mach_port_extract_right (inf->priv->task, names[i], |
bb00b29d TG |
2325 | MACH_MSG_TYPE_COPY_SEND, |
2326 | &local_name, &local_type); | |
2327 | if (kret != KERN_SUCCESS) | |
2328 | continue; | |
2329 | mach_port_deallocate (gdb_task, local_name); | |
2330 | ||
2331 | for (k = 0; | |
fe978cb0 | 2332 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
2333 | k++) |
2334 | if (t->gdb_port == local_name) | |
2335 | { | |
2336 | t->inf_port = names[i]; | |
2337 | if (names[i] == lwp) | |
2338 | res = t->gdb_port; | |
2339 | } | |
2340 | } | |
2341 | ||
2342 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2343 | names_count * sizeof (mach_port_t)); | |
2344 | ||
2345 | if (res) | |
2346 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); | |
2347 | else | |
2348 | return null_ptid; | |
2349 | } | |
2350 | ||
2351 | static int | |
86ce2668 | 2352 | darwin_supports_multi_process (struct target_ops *self) |
bb00b29d TG |
2353 | { |
2354 | return 1; | |
2355 | } | |
2356 | ||
c381a3f6 JB |
2357 | /* -Wmissing-prototypes */ |
2358 | extern initialize_file_ftype _initialize_darwin_inferior; | |
2359 | ||
a80b95ba | 2360 | void |
bb00b29d | 2361 | _initialize_darwin_inferior (void) |
a80b95ba TG |
2362 | { |
2363 | kern_return_t kret; | |
2364 | ||
a80b95ba TG |
2365 | gdb_task = mach_task_self (); |
2366 | darwin_host_self = mach_host_self (); | |
2367 | ||
2368 | /* Read page size. */ | |
2369 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2370 | if (kret != KERN_SUCCESS) | |
2371 | { | |
2372 | mach_page_size = 0x1000; | |
2373 | MACH_CHECK_ERROR (kret); | |
2374 | } | |
2375 | ||
a80b95ba TG |
2376 | darwin_ops = inf_child_target (); |
2377 | ||
a80b95ba TG |
2378 | darwin_ops->to_create_inferior = darwin_create_inferior; |
2379 | darwin_ops->to_attach = darwin_attach; | |
2380 | darwin_ops->to_attach_no_wait = 0; | |
2381 | darwin_ops->to_detach = darwin_detach; | |
2382 | darwin_ops->to_files_info = darwin_files_info; | |
bb00b29d | 2383 | darwin_ops->to_wait = darwin_wait_to; |
a80b95ba TG |
2384 | darwin_ops->to_mourn_inferior = darwin_mourn_inferior; |
2385 | darwin_ops->to_kill = darwin_kill_inferior; | |
bfedc46a | 2386 | darwin_ops->to_interrupt = darwin_interrupt; |
bb00b29d | 2387 | darwin_ops->to_resume = darwin_resume_to; |
a80b95ba TG |
2388 | darwin_ops->to_thread_alive = darwin_thread_alive; |
2389 | darwin_ops->to_pid_to_str = darwin_pid_to_str; | |
bb00b29d | 2390 | darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file; |
a80b95ba | 2391 | darwin_ops->to_load = NULL; |
a80b95ba | 2392 | darwin_ops->to_xfer_partial = darwin_xfer_partial; |
bb00b29d TG |
2393 | darwin_ops->to_supports_multi_process = darwin_supports_multi_process; |
2394 | darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid; | |
a80b95ba TG |
2395 | |
2396 | darwin_complete_target (darwin_ops); | |
2397 | ||
2398 | add_target (darwin_ops); | |
2399 | ||
3eb831e0 TG |
2400 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), |
2401 | (unsigned long) mach_task_self (), getpid ()); | |
a80b95ba | 2402 | |
ccce17b0 YQ |
2403 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2404 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2405 | Set if printing inferior communication debugging statements."), _("\ |
2406 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2407 | NULL, NULL, |
2408 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2409 | |
2410 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2411 | &enable_mach_exceptions, _("\ | |
2412 | Set if mach exceptions are caught."), _("\ | |
2413 | Show if mach exceptions are caught."), _("\ | |
2414 | When this mode is on, all low level exceptions are reported before being\n\ | |
2415 | reported by the kernel."), | |
2416 | &set_enable_mach_exceptions, NULL, | |
2417 | &setlist, &showlist); | |
2418 | } |