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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. */ | |
bb00b29d | 370 | struct private_thread_info *pti; |
a80b95ba | 371 | |
41bf6aca | 372 | pti = XCNEW (struct private_thread_info); |
bb00b29d TG |
373 | pti->gdb_port = new_id; |
374 | pti->msg_state = DARWIN_RUNNING; | |
375 | ||
db665f42 SM |
376 | /* Add the new thread. */ |
377 | add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti); | |
bb00b29d | 378 | VEC_safe_push (darwin_thread_t, thread_vec, pti); |
a80b95ba TG |
379 | new_ix++; |
380 | continue; | |
381 | } | |
bb00b29d | 382 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
383 | { |
384 | /* A thread was removed. */ | |
385 | delete_thread (ptid_build (inf->pid, 0, old_id)); | |
386 | kret = mach_port_deallocate (gdb_task, old_id); | |
387 | MACH_CHECK_ERROR (kret); | |
388 | old_ix++; | |
bb00b29d | 389 | continue; |
a80b95ba | 390 | } |
f3574227 | 391 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
392 | } |
393 | ||
bb00b29d TG |
394 | if (darwin_inf->threads) |
395 | VEC_free (darwin_thread_t, darwin_inf->threads); | |
396 | darwin_inf->threads = thread_vec; | |
a80b95ba | 397 | |
15a9128a | 398 | /* Deallocate the buffer. */ |
a80b95ba TG |
399 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
400 | new_nbr * sizeof (int)); | |
401 | MACH_CHECK_ERROR (kret); | |
402 | } | |
403 | ||
bb00b29d TG |
404 | static int |
405 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 406 | { |
82b19a4d | 407 | return inf->priv->task == *(task_t *)port_ptr; |
bb00b29d | 408 | } |
a80b95ba | 409 | |
bb00b29d | 410 | static int |
82b19a4d | 411 | find_inferior_pid_it (struct inferior *inf, void *pid_ptr) |
bb00b29d | 412 | { |
82b19a4d | 413 | return inf->pid == *(int *)pid_ptr; |
a80b95ba TG |
414 | } |
415 | ||
bb00b29d TG |
416 | /* Return an inferior by task port. */ |
417 | static struct inferior * | |
418 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 419 | { |
bb00b29d TG |
420 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
421 | } | |
a80b95ba | 422 | |
82b19a4d | 423 | /* Return an inferior by pid port. */ |
bb00b29d | 424 | static struct inferior * |
82b19a4d | 425 | darwin_find_inferior_by_pid (int pid) |
bb00b29d | 426 | { |
82b19a4d | 427 | return iterate_over_inferiors (&find_inferior_pid_it, &pid); |
bb00b29d | 428 | } |
a80b95ba | 429 | |
bb00b29d TG |
430 | /* Return a thread by port. */ |
431 | static darwin_thread_t * | |
432 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
433 | { | |
434 | darwin_thread_t *t; | |
435 | int k; | |
436 | ||
437 | for (k = 0; | |
fe978cb0 | 438 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
439 | k++) |
440 | if (t->gdb_port == thread) | |
441 | return t; | |
442 | return NULL; | |
443 | } | |
a80b95ba | 444 | |
bb00b29d | 445 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 446 | |
bb00b29d TG |
447 | static void |
448 | darwin_suspend_inferior (struct inferior *inf) | |
449 | { | |
fe978cb0 | 450 | if (!inf->priv->suspended) |
a80b95ba | 451 | { |
bb00b29d | 452 | kern_return_t kret; |
a80b95ba | 453 | |
fe978cb0 | 454 | kret = task_suspend (inf->priv->task); |
bb00b29d | 455 | MACH_CHECK_ERROR (kret); |
a80b95ba | 456 | |
fe978cb0 | 457 | inf->priv->suspended = 1; |
bb00b29d TG |
458 | } |
459 | } | |
a80b95ba | 460 | |
bb00b29d | 461 | /* Resume an inferior at Mach level. */ |
a80b95ba | 462 | |
bb00b29d TG |
463 | static void |
464 | darwin_resume_inferior (struct inferior *inf) | |
465 | { | |
fe978cb0 | 466 | if (inf->priv->suspended) |
bb00b29d TG |
467 | { |
468 | kern_return_t kret; | |
a80b95ba | 469 | |
fe978cb0 | 470 | kret = task_resume (inf->priv->task); |
bb00b29d TG |
471 | MACH_CHECK_ERROR (kret); |
472 | ||
fe978cb0 | 473 | inf->priv->suspended = 0; |
a80b95ba TG |
474 | } |
475 | } | |
476 | ||
bb00b29d TG |
477 | /* Iterator functions. */ |
478 | ||
479 | static int | |
480 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 481 | { |
bb00b29d TG |
482 | darwin_suspend_inferior (inf); |
483 | darwin_check_new_threads (inf); | |
484 | return 0; | |
485 | } | |
486 | ||
487 | static int | |
488 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
489 | { | |
490 | darwin_resume_inferior (inf); | |
491 | return 0; | |
a80b95ba TG |
492 | } |
493 | ||
bb00b29d TG |
494 | static void |
495 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
496 | { | |
497 | printf_unfiltered (_("message header:\n")); | |
498 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
499 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
500 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
501 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
502 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
503 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
504 | ||
505 | if (disp_body) | |
506 | { | |
507 | const unsigned char *data; | |
a6290449 | 508 | const unsigned int *ldata; |
bb00b29d TG |
509 | int size; |
510 | int i; | |
511 | ||
512 | data = (unsigned char *)(hdr + 1); | |
513 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
514 | ||
515 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
516 | { | |
517 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
518 | mach_msg_port_descriptor_t *desc = | |
519 | (mach_msg_port_descriptor_t *)(bod + 1); | |
520 | int k; | |
521 | NDR_record_t *ndr; | |
522 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
523 | bod->msgh_descriptor_count); | |
524 | data += sizeof (mach_msg_body_t); | |
525 | size -= sizeof (mach_msg_body_t); | |
526 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
527 | switch (desc[k].type) | |
528 | { | |
529 | case MACH_MSG_PORT_DESCRIPTOR: | |
530 | printf_unfiltered | |
531 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
532 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
533 | break; | |
534 | default: | |
535 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
536 | k, desc[k].type); | |
537 | break; | |
538 | } | |
539 | data += bod->msgh_descriptor_count | |
540 | * sizeof (mach_msg_port_descriptor_t); | |
541 | size -= bod->msgh_descriptor_count | |
542 | * sizeof (mach_msg_port_descriptor_t); | |
543 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
544 | printf_unfiltered | |
545 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
546 | "int=%02x char=%02x float=%02x\n"), | |
547 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
548 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
549 | data += sizeof (NDR_record_t); | |
550 | size -= sizeof (NDR_record_t); | |
551 | } | |
552 | ||
553 | printf_unfiltered (_(" data:")); | |
a6290449 TG |
554 | ldata = (const unsigned int *)data; |
555 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
556 | printf_unfiltered (" %08x", ldata[i]); | |
bb00b29d TG |
557 | printf_unfiltered (_("\n")); |
558 | } | |
559 | } | |
560 | ||
82b19a4d TG |
561 | /* Adjust inferior data when a new task was created. */ |
562 | ||
563 | static struct inferior * | |
564 | darwin_find_new_inferior (task_t task_port, thread_t thread_port) | |
565 | { | |
566 | int task_pid; | |
567 | struct inferior *inf; | |
568 | kern_return_t kret; | |
569 | mach_port_t prev; | |
570 | ||
571 | /* Find the corresponding pid. */ | |
572 | kret = pid_for_task (task_port, &task_pid); | |
573 | if (kret != KERN_SUCCESS) | |
574 | { | |
575 | MACH_CHECK_ERROR (kret); | |
576 | return NULL; | |
577 | } | |
578 | ||
579 | /* Find the inferior for this pid. */ | |
580 | inf = darwin_find_inferior_by_pid (task_pid); | |
581 | if (inf == NULL) | |
582 | return NULL; | |
583 | ||
584 | /* Deallocate saved exception ports. */ | |
585 | darwin_deallocate_exception_ports (inf->priv); | |
586 | ||
587 | /* No need to remove dead_name notification, but still... */ | |
588 | kret = mach_port_request_notification (gdb_task, inf->priv->task, | |
589 | MACH_NOTIFY_DEAD_NAME, 0, | |
590 | MACH_PORT_NULL, | |
591 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
592 | &prev); | |
593 | if (kret != KERN_INVALID_ARGUMENT) | |
594 | MACH_CHECK_ERROR (kret); | |
595 | ||
596 | /* Replace old task port. */ | |
597 | kret = mach_port_deallocate (gdb_task, inf->priv->task); | |
598 | MACH_CHECK_ERROR (kret); | |
599 | inf->priv->task = task_port; | |
600 | ||
601 | darwin_setup_request_notification (inf); | |
602 | darwin_setup_exceptions (inf); | |
603 | ||
604 | return inf; | |
605 | } | |
606 | ||
607 | /* Check data representation. */ | |
608 | ||
609 | static int | |
610 | darwin_check_message_ndr (NDR_record_t *ndr) | |
611 | { | |
612 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
613 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
614 | || ndr->mig_encoding != NDR_record.mig_encoding | |
615 | || ndr->int_rep != NDR_record.int_rep | |
616 | || ndr->char_rep != NDR_record.char_rep | |
617 | || ndr->float_rep != NDR_record.float_rep) | |
618 | return -1; | |
619 | return 0; | |
620 | } | |
621 | ||
622 | /* Decode an exception message. */ | |
623 | ||
bb00b29d TG |
624 | static int |
625 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
626 | struct inferior **pinf, | |
627 | darwin_thread_t **pthread) | |
a80b95ba | 628 | { |
bb00b29d TG |
629 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
630 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
631 | NDR_record_t *ndr; | |
632 | integer_t *data; | |
633 | struct inferior *inf; | |
634 | darwin_thread_t *thread; | |
635 | task_t task_port; | |
636 | thread_t thread_port; | |
a80b95ba | 637 | kern_return_t kret; |
bb00b29d | 638 | int i; |
a80b95ba | 639 | |
a41f2563 TG |
640 | /* Check message destination. */ |
641 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
642 | return -1; |
643 | ||
644 | /* Check message header. */ | |
645 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
646 | return -1; | |
647 | ||
648 | /* Check descriptors. */ | |
649 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
650 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
651 | || bod->msgh_descriptor_count != 2 | |
652 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
653 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
654 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
655 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
656 | return -1; | |
657 | ||
658 | /* Check data representation. */ | |
659 | ndr = (NDR_record_t *)(desc + 2); | |
82b19a4d | 660 | if (darwin_check_message_ndr (ndr) != 0) |
bb00b29d TG |
661 | return -1; |
662 | ||
663 | /* Ok, the hard work. */ | |
664 | data = (integer_t *)(ndr + 1); | |
665 | ||
bb00b29d TG |
666 | task_port = desc[1].name; |
667 | thread_port = desc[0].name; | |
a41f2563 | 668 | |
a41f2563 | 669 | /* Find process by port. */ |
bb00b29d | 670 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 671 | *pinf = inf; |
82b19a4d TG |
672 | |
673 | if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2 | |
674 | && data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP) | |
675 | { | |
676 | /* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0, | |
677 | as a new Mach task is created when a process exec. */ | |
678 | inf = darwin_find_new_inferior (task_port, thread_port); | |
679 | *pinf = inf; | |
680 | ||
681 | if (inf == NULL) | |
682 | { | |
683 | /* Deallocate task_port, unless it was saved. */ | |
684 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
685 | MACH_CHECK_ERROR (kret); | |
686 | } | |
687 | } | |
688 | else | |
689 | { | |
690 | /* We got new rights to the task, get rid of it. Do not get rid of | |
691 | thread right, as we will need it to find the thread. */ | |
692 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
693 | MACH_CHECK_ERROR (kret); | |
694 | } | |
695 | ||
a41f2563 TG |
696 | if (inf == NULL) |
697 | { | |
698 | /* Not a known inferior. This could happen if the child fork, as | |
699 | the created process will inherit its exception port. | |
700 | FIXME: should the exception port be restored ? */ | |
701 | kern_return_t kret; | |
702 | mig_reply_error_t reply; | |
703 | ||
82b19a4d TG |
704 | inferior_debug |
705 | (4, _("darwin_decode_exception_message: unknown task 0x%x\n"), | |
706 | task_port); | |
707 | ||
15a9128a TG |
708 | /* Free thread port (we don't know it). */ |
709 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
710 | MACH_CHECK_ERROR (kret); | |
711 | ||
a41f2563 TG |
712 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); |
713 | ||
714 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
715 | reply.Head.msgh_size, 0, | |
716 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
717 | MACH_PORT_NULL); | |
718 | MACH_CHECK_ERROR (kret); | |
719 | ||
720 | return 0; | |
721 | } | |
bb00b29d TG |
722 | |
723 | /* Find thread by port. */ | |
724 | /* Check for new threads. Do it early so that the port in the exception | |
725 | message can be deallocated. */ | |
726 | darwin_check_new_threads (inf); | |
727 | ||
15a9128a TG |
728 | /* Free the thread port (as gdb knows the thread, it has already has a right |
729 | for it, so this just decrement a reference counter). */ | |
730 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
731 | MACH_CHECK_ERROR (kret); | |
732 | ||
bb00b29d TG |
733 | thread = darwin_find_thread (inf, thread_port); |
734 | if (thread == NULL) | |
735 | return -1; | |
736 | *pthread = thread; | |
737 | ||
a6290449 TG |
738 | /* The thread should be running. However we have observed cases where a |
739 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
740 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
741 | ||
bb00b29d | 742 | /* Finish decoding. */ |
bb00b29d TG |
743 | thread->event.header = *hdr; |
744 | thread->event.thread_port = thread_port; | |
745 | thread->event.task_port = task_port; | |
746 | thread->event.ex_type = data[0]; | |
747 | thread->event.data_count = data[1]; | |
748 | ||
749 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
750 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
751 | + data[1] * sizeof (integer_t))) | |
752 | return -1; | |
753 | for (i = 0; i < data[1]; i++) | |
754 | thread->event.ex_data[i] = data[2 + i]; | |
755 | ||
756 | thread->msg_state = DARWIN_MESSAGE; | |
757 | ||
758 | return 0; | |
759 | } | |
760 | ||
82b19a4d TG |
761 | /* Decode dead_name notify message. */ |
762 | ||
763 | static int | |
764 | darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf) | |
765 | { | |
766 | NDR_record_t *ndr = (NDR_record_t *)(hdr + 1); | |
767 | integer_t *data = (integer_t *)(ndr + 1); | |
768 | struct inferior *inf; | |
769 | darwin_thread_t *thread; | |
770 | task_t task_port; | |
771 | thread_t thread_port; | |
772 | kern_return_t kret; | |
773 | int i; | |
774 | ||
775 | /* Check message header. */ | |
776 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
777 | return -1; | |
778 | ||
779 | /* Check descriptors. */ | |
780 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t))) | |
781 | return -2; | |
782 | ||
783 | /* Check data representation. */ | |
784 | if (darwin_check_message_ndr (ndr) != 0) | |
785 | return -3; | |
786 | ||
787 | task_port = data[0]; | |
788 | ||
789 | /* Find process by port. */ | |
790 | inf = darwin_find_inferior_by_task (task_port); | |
791 | *pinf = inf; | |
792 | ||
793 | /* Check message destination. */ | |
794 | if (inf != NULL && hdr->msgh_local_port != inf->priv->notify_port) | |
795 | return -4; | |
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
bb00b29d TG |
800 | static void |
801 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
802 | integer_t code) | |
803 | { | |
804 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
805 | |
806 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 807 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 808 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
809 | rh->msgh_local_port = MACH_PORT_NULL; |
810 | rh->msgh_id = hdr->msgh_id + 100; | |
811 | ||
812 | reply->NDR = NDR_record; | |
813 | reply->RetCode = code; | |
a80b95ba TG |
814 | } |
815 | ||
bb00b29d TG |
816 | static void |
817 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
818 | { |
819 | kern_return_t kret; | |
bb00b29d | 820 | mig_reply_error_t reply; |
a80b95ba | 821 | |
bb00b29d TG |
822 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
823 | ||
824 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
825 | reply.Head.msgh_size, 0, | |
826 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
827 | MACH_PORT_NULL); | |
a80b95ba TG |
828 | MACH_CHECK_ERROR (kret); |
829 | ||
fe978cb0 | 830 | inf->priv->pending_messages--; |
bb00b29d TG |
831 | } |
832 | ||
833 | static void | |
834 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
835 | int step, int nsignal) | |
836 | { | |
837 | kern_return_t kret; | |
838 | int res; | |
839 | ||
a80b95ba | 840 | inferior_debug |
bb00b29d TG |
841 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
842 | thread->msg_state, thread->gdb_port, step, nsignal); | |
843 | ||
844 | switch (thread->msg_state) | |
a80b95ba | 845 | { |
bb00b29d TG |
846 | case DARWIN_MESSAGE: |
847 | if (thread->event.ex_type == EXC_SOFTWARE | |
848 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
849 | { | |
850 | /* Either deliver a new signal or cancel the signal received. */ | |
851 | res = PTRACE (PT_THUPDATE, inf->pid, | |
597e448c | 852 | (caddr_t) (uintptr_t) thread->gdb_port, nsignal); |
bb00b29d TG |
853 | if (res < 0) |
854 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
855 | } | |
856 | else if (nsignal) | |
857 | { | |
858 | /* Note: ptrace is allowed only if the process is stopped. | |
859 | Directly send the signal to the thread. */ | |
860 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
861 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), | |
862 | thread->gdb_port, nsignal, res); | |
863 | thread->signaled = 1; | |
864 | } | |
865 | ||
d987a266 | 866 | /* Set or reset single step. */ |
aa14fb50 TG |
867 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
868 | thread->gdb_port, step); | |
869 | darwin_set_sstep (thread->gdb_port, step); | |
870 | thread->single_step = step; | |
bb00b29d TG |
871 | |
872 | darwin_send_reply (inf, thread); | |
873 | thread->msg_state = DARWIN_RUNNING; | |
874 | break; | |
875 | ||
876 | case DARWIN_RUNNING: | |
877 | break; | |
878 | ||
879 | case DARWIN_STOPPED: | |
880 | kret = thread_resume (thread->gdb_port); | |
881 | MACH_CHECK_ERROR (kret); | |
882 | ||
883 | thread->msg_state = DARWIN_RUNNING; | |
884 | break; | |
a80b95ba | 885 | } |
bb00b29d | 886 | } |
a80b95ba | 887 | |
bb00b29d | 888 | /* Resume all threads of the inferior. */ |
a80b95ba | 889 | |
bb00b29d TG |
890 | static void |
891 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
892 | { | |
893 | darwin_thread_t *thread; | |
894 | int k; | |
895 | ||
896 | for (k = 0; | |
fe978cb0 | 897 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, thread); |
bb00b29d TG |
898 | k++) |
899 | darwin_resume_thread (inf, thread, step, nsignal); | |
a80b95ba TG |
900 | } |
901 | ||
bb00b29d | 902 | struct resume_inferior_threads_param |
a80b95ba | 903 | { |
bb00b29d TG |
904 | int step; |
905 | int nsignal; | |
906 | }; | |
907 | ||
908 | static int | |
909 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
910 | { | |
911 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
912 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
913 | ||
914 | darwin_resume_inferior_threads (inf, step, nsignal); | |
915 | ||
916 | return 0; | |
917 | } | |
918 | ||
919 | /* Suspend all threads of INF. */ | |
920 | ||
921 | static void | |
922 | darwin_suspend_inferior_threads (struct inferior *inf) | |
923 | { | |
924 | darwin_thread_t *thread; | |
a80b95ba | 925 | kern_return_t kret; |
bb00b29d TG |
926 | int k; |
927 | ||
928 | for (k = 0; | |
fe978cb0 | 929 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, thread); |
bb00b29d TG |
930 | k++) |
931 | switch (thread->msg_state) | |
932 | { | |
933 | case DARWIN_STOPPED: | |
934 | case DARWIN_MESSAGE: | |
935 | break; | |
936 | case DARWIN_RUNNING: | |
937 | kret = thread_suspend (thread->gdb_port); | |
938 | MACH_CHECK_ERROR (kret); | |
939 | thread->msg_state = DARWIN_STOPPED; | |
940 | break; | |
941 | } | |
942 | } | |
a80b95ba | 943 | |
bb00b29d | 944 | static void |
2ea28649 | 945 | darwin_resume (ptid_t ptid, int step, enum gdb_signal signal) |
bb00b29d TG |
946 | { |
947 | struct target_waitstatus status; | |
948 | int pid; | |
a80b95ba | 949 | |
bb00b29d TG |
950 | kern_return_t kret; |
951 | int res; | |
952 | int nsignal; | |
953 | struct inferior *inf; | |
a80b95ba | 954 | |
bb00b29d | 955 | inferior_debug |
3eb831e0 | 956 | (2, _("darwin_resume: pid=%d, tid=0x%lx, step=%d, signal=%d\n"), |
bb00b29d TG |
957 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); |
958 | ||
a493e3e2 | 959 | if (signal == GDB_SIGNAL_0) |
bb00b29d TG |
960 | nsignal = 0; |
961 | else | |
2ea28649 | 962 | nsignal = gdb_signal_to_host (signal); |
a80b95ba | 963 | |
bb00b29d TG |
964 | /* Don't try to single step all threads. */ |
965 | if (step) | |
966 | ptid = inferior_ptid; | |
967 | ||
968 | /* minus_one_ptid is RESUME_ALL. */ | |
969 | if (ptid_equal (ptid, minus_one_ptid)) | |
a80b95ba | 970 | { |
bb00b29d TG |
971 | struct resume_inferior_threads_param param; |
972 | ||
973 | param.nsignal = nsignal; | |
974 | param.step = step; | |
a80b95ba | 975 | |
bb00b29d TG |
976 | /* Resume threads. */ |
977 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
978 | /* Resume tasks. */ | |
979 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
980 | } | |
981 | else | |
a80b95ba | 982 | { |
c9657e70 | 983 | struct inferior *inf = find_inferior_ptid (ptid); |
bb00b29d TG |
984 | long tid = ptid_get_tid (ptid); |
985 | ||
986 | /* Stop the inferior (should be useless). */ | |
987 | darwin_suspend_inferior (inf); | |
988 | ||
989 | if (tid == 0) | |
990 | darwin_resume_inferior_threads (inf, step, nsignal); | |
991 | else | |
992 | { | |
993 | darwin_thread_t *thread; | |
994 | ||
995 | /* Suspend threads of the task. */ | |
996 | darwin_suspend_inferior_threads (inf); | |
997 | ||
998 | /* Resume the selected thread. */ | |
999 | thread = darwin_find_thread (inf, tid); | |
1000 | gdb_assert (thread); | |
1001 | darwin_resume_thread (inf, thread, step, nsignal); | |
1002 | } | |
1003 | ||
1004 | /* Resume the task. */ | |
1005 | darwin_resume_inferior (inf); | |
a80b95ba | 1006 | } |
bb00b29d | 1007 | } |
a80b95ba | 1008 | |
bb00b29d TG |
1009 | static void |
1010 | darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 1011 | enum gdb_signal signal) |
bb00b29d TG |
1012 | { |
1013 | return darwin_resume (ptid, step, signal); | |
1014 | } | |
1015 | ||
1016 | static ptid_t | |
1017 | darwin_decode_message (mach_msg_header_t *hdr, | |
1018 | darwin_thread_t **pthread, | |
1019 | struct inferior **pinf, | |
1020 | struct target_waitstatus *status) | |
1021 | { | |
1022 | darwin_thread_t *thread; | |
1023 | struct inferior *inf; | |
a80b95ba | 1024 | |
a41f2563 TG |
1025 | /* Exception message. 2401 == 0x961 is exc. */ |
1026 | if (hdr->msgh_id == 2401) | |
a80b95ba | 1027 | { |
bb00b29d TG |
1028 | int res; |
1029 | ||
1030 | /* Decode message. */ | |
1031 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
1032 | ||
1033 | if (res < 0) | |
a80b95ba | 1034 | { |
bb00b29d | 1035 | /* Should not happen... */ |
c8c9911f JB |
1036 | printf_unfiltered |
1037 | (_("darwin_wait: ill-formatted message (id=0x%x)\n"), hdr->msgh_id); | |
bb00b29d | 1038 | /* FIXME: send a failure reply? */ |
a41f2563 TG |
1039 | status->kind = TARGET_WAITKIND_IGNORE; |
1040 | return minus_one_ptid; | |
1041 | } | |
1042 | if (inf == NULL) | |
1043 | { | |
1044 | status->kind = TARGET_WAITKIND_IGNORE; | |
a80b95ba TG |
1045 | return minus_one_ptid; |
1046 | } | |
bb00b29d TG |
1047 | *pinf = inf; |
1048 | *pthread = thread; | |
fe978cb0 | 1049 | inf->priv->pending_messages++; |
a80b95ba TG |
1050 | |
1051 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
1052 | thread->msg_state = DARWIN_MESSAGE; |
1053 | ||
c8c9911f | 1054 | inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"), |
bb00b29d TG |
1055 | thread->gdb_port, |
1056 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 1057 | |
bb00b29d | 1058 | switch (thread->event.ex_type) |
a80b95ba TG |
1059 | { |
1060 | case EXC_BAD_ACCESS: | |
4e225075 | 1061 | status->value.sig = GDB_EXC_BAD_ACCESS; |
a80b95ba TG |
1062 | break; |
1063 | case EXC_BAD_INSTRUCTION: | |
4e225075 | 1064 | status->value.sig = GDB_EXC_BAD_INSTRUCTION; |
a80b95ba TG |
1065 | break; |
1066 | case EXC_ARITHMETIC: | |
4e225075 | 1067 | status->value.sig = GDB_EXC_ARITHMETIC; |
a80b95ba TG |
1068 | break; |
1069 | case EXC_EMULATION: | |
4e225075 | 1070 | status->value.sig = GDB_EXC_EMULATION; |
a80b95ba TG |
1071 | break; |
1072 | case EXC_SOFTWARE: | |
bb00b29d | 1073 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 1074 | { |
bb00b29d | 1075 | status->value.sig = |
2ea28649 | 1076 | gdb_signal_from_host (thread->event.ex_data[1]); |
bb00b29d TG |
1077 | inferior_debug (5, _(" (signal %d: %s)\n"), |
1078 | thread->event.ex_data[1], | |
2ea28649 | 1079 | gdb_signal_to_name (status->value.sig)); |
bb00b29d TG |
1080 | |
1081 | /* If the thread is stopped because it has received a signal | |
1082 | that gdb has just sent, continue. */ | |
1083 | if (thread->signaled) | |
1084 | { | |
1085 | thread->signaled = 0; | |
1086 | darwin_send_reply (inf, thread); | |
1087 | thread->msg_state = DARWIN_RUNNING; | |
1088 | status->kind = TARGET_WAITKIND_IGNORE; | |
1089 | } | |
a80b95ba TG |
1090 | } |
1091 | else | |
4e225075 | 1092 | status->value.sig = GDB_EXC_SOFTWARE; |
a80b95ba TG |
1093 | break; |
1094 | case EXC_BREAKPOINT: | |
1095 | /* Many internal GDB routines expect breakpoints to be reported | |
4e225075 | 1096 | as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT |
0963b4bd | 1097 | as a spurious signal. */ |
a493e3e2 | 1098 | status->value.sig = GDB_SIGNAL_TRAP; |
a80b95ba TG |
1099 | break; |
1100 | default: | |
a493e3e2 | 1101 | status->value.sig = GDB_SIGNAL_UNKNOWN; |
a80b95ba TG |
1102 | break; |
1103 | } | |
1104 | ||
bb00b29d TG |
1105 | return ptid_build (inf->pid, 0, thread->gdb_port); |
1106 | } | |
a41f2563 | 1107 | else if (hdr->msgh_id == 0x48) |
bb00b29d | 1108 | { |
a41f2563 | 1109 | /* MACH_NOTIFY_DEAD_NAME: notification for exit. */ |
82b19a4d TG |
1110 | int res; |
1111 | ||
1112 | res = darwin_decode_notify_message (hdr, &inf); | |
1113 | ||
1114 | if (res < 0) | |
1115 | { | |
1116 | /* Should not happen... */ | |
1117 | printf_unfiltered | |
1118 | (_("darwin_wait: ill-formatted message (id=0x%x, res=%d)\n"), | |
1119 | hdr->msgh_id, res); | |
1120 | } | |
1121 | ||
a41f2563 TG |
1122 | *pinf = NULL; |
1123 | *pthread = NULL; | |
bb00b29d | 1124 | |
82b19a4d TG |
1125 | if (res < 0 || inf == NULL) |
1126 | { | |
1127 | status->kind = TARGET_WAITKIND_IGNORE; | |
1128 | return minus_one_ptid; | |
1129 | } | |
1130 | ||
a41f2563 TG |
1131 | if (inf != NULL) |
1132 | { | |
fe978cb0 | 1133 | if (!inf->priv->no_ptrace) |
bb00b29d | 1134 | { |
a41f2563 TG |
1135 | pid_t res; |
1136 | int wstatus; | |
1137 | ||
1138 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
1139 | if (res < 0 || res != inf->pid) | |
1140 | { | |
1141 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
1142 | res, safe_strerror (errno)); | |
1143 | status->kind = TARGET_WAITKIND_IGNORE; | |
1144 | return minus_one_ptid; | |
1145 | } | |
1146 | if (WIFEXITED (wstatus)) | |
1147 | { | |
1148 | status->kind = TARGET_WAITKIND_EXITED; | |
1149 | status->value.integer = WEXITSTATUS (wstatus); | |
1150 | } | |
1151 | else | |
1152 | { | |
1153 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
5ae00552 | 1154 | status->value.sig = gdb_signal_from_host (WTERMSIG (wstatus)); |
a41f2563 TG |
1155 | } |
1156 | ||
1157 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"), | |
1158 | res, wstatus); | |
1159 | ||
1160 | /* Looks necessary on Leopard and harmless... */ | |
1161 | wait4 (inf->pid, &wstatus, 0, NULL); | |
1162 | ||
82b19a4d TG |
1163 | inferior_ptid = ptid_build (inf->pid, 0, 0); |
1164 | return inferior_ptid; | |
bb00b29d TG |
1165 | } |
1166 | else | |
1167 | { | |
a41f2563 TG |
1168 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
1169 | status->kind = TARGET_WAITKIND_EXITED; | |
1170 | status->value.integer = 0; /* Don't know. */ | |
1171 | return ptid_build (inf->pid, 0, 0); | |
bb00b29d | 1172 | } |
bb00b29d TG |
1173 | } |
1174 | } | |
1175 | ||
a41f2563 | 1176 | /* Unknown message. */ |
86ad98c3 | 1177 | warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id); |
a41f2563 | 1178 | status->kind = TARGET_WAITKIND_IGNORE; |
bb00b29d TG |
1179 | return minus_one_ptid; |
1180 | } | |
1181 | ||
1182 | static int | |
1183 | cancel_breakpoint (ptid_t ptid) | |
1184 | { | |
0963b4bd | 1185 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1186 | the current event, eventually we will resume this thread, and this |
1187 | breakpoint will trap again. | |
1188 | ||
1189 | If we do not do this, then we run the risk that the user will | |
1190 | delete or disable the breakpoint, but the thread will have already | |
1191 | tripped on it. */ | |
1192 | ||
1193 | struct regcache *regcache = get_thread_regcache (ptid); | |
1194 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1195 | CORE_ADDR pc; | |
a80b95ba | 1196 | |
527a273a | 1197 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
40625c9d | 1198 | if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc)) |
bb00b29d | 1199 | { |
3eb831e0 TG |
1200 | inferior_debug (4, "cancel_breakpoint for thread 0x%lx\n", |
1201 | (unsigned long) ptid_get_tid (ptid)); | |
bb00b29d TG |
1202 | |
1203 | /* Back up the PC if necessary. */ | |
527a273a | 1204 | if (gdbarch_decr_pc_after_break (gdbarch)) |
bb00b29d TG |
1205 | regcache_write_pc (regcache, pc); |
1206 | ||
1207 | return 1; | |
a80b95ba | 1208 | } |
bb00b29d TG |
1209 | return 0; |
1210 | } | |
1211 | ||
1212 | static ptid_t | |
1213 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1214 | { | |
1215 | kern_return_t kret; | |
1216 | union | |
1217 | { | |
1218 | mach_msg_header_t hdr; | |
1219 | char data[0x100]; | |
1220 | } msgin; | |
1221 | mach_msg_header_t *hdr = &msgin.hdr; | |
1222 | ptid_t res; | |
1223 | darwin_thread_t *thread; | |
1224 | struct inferior *inf; | |
1225 | ||
1226 | inferior_debug | |
1227 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
1228 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
1229 | ||
1230 | /* Handle fake stop events at first. */ | |
1231 | if (darwin_inf_fake_stop != NULL) | |
1232 | { | |
1233 | inf = darwin_inf_fake_stop; | |
1234 | darwin_inf_fake_stop = NULL; | |
1235 | ||
1236 | status->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 1237 | status->value.sig = GDB_SIGNAL_TRAP; |
fe978cb0 | 1238 | thread = VEC_index (darwin_thread_t, inf->priv->threads, 0); |
bb00b29d TG |
1239 | thread->msg_state = DARWIN_STOPPED; |
1240 | return ptid_build (inf->pid, 0, thread->gdb_port); | |
1241 | } | |
1242 | ||
1243 | do | |
1244 | { | |
1245 | /* set_sigint_trap (); */ | |
1246 | ||
1247 | /* Wait for a message. */ | |
1248 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1249 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1250 | ||
1251 | /* clear_sigint_trap (); */ | |
1252 | ||
1253 | if (kret == MACH_RCV_INTERRUPTED) | |
1254 | { | |
1255 | status->kind = TARGET_WAITKIND_IGNORE; | |
1256 | return minus_one_ptid; | |
1257 | } | |
1258 | ||
1259 | if (kret != MACH_MSG_SUCCESS) | |
1260 | { | |
c8c9911f | 1261 | inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret); |
bb00b29d TG |
1262 | status->kind = TARGET_WAITKIND_SPURIOUS; |
1263 | return minus_one_ptid; | |
1264 | } | |
1265 | ||
1266 | /* Debug: display message. */ | |
1267 | if (darwin_debug_flag > 10) | |
1268 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1269 | ||
1270 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
a41f2563 TG |
1271 | if (ptid_equal (res, minus_one_ptid)) |
1272 | continue; | |
bb00b29d | 1273 | |
a41f2563 | 1274 | /* Early return in case an inferior has exited. */ |
bb00b29d TG |
1275 | if (inf == NULL) |
1276 | return res; | |
1277 | } | |
1278 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1279 | ||
1280 | /* Stop all tasks. */ | |
1281 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1282 | ||
1283 | /* Read pending messages. */ | |
1284 | while (1) | |
a80b95ba | 1285 | { |
bb00b29d TG |
1286 | struct target_waitstatus status2; |
1287 | ptid_t ptid2; | |
1288 | ||
1289 | kret = mach_msg (&msgin.hdr, | |
1290 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1291 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1292 | ||
1293 | if (kret == MACH_RCV_TIMED_OUT) | |
1294 | break; | |
1295 | if (kret != MACH_MSG_SUCCESS) | |
1296 | { | |
1297 | inferior_debug | |
c8c9911f | 1298 | (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret); |
bb00b29d TG |
1299 | break; |
1300 | } | |
1301 | ||
a41f2563 TG |
1302 | /* Debug: display message. */ |
1303 | if (darwin_debug_flag > 10) | |
1304 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1305 | ||
bb00b29d | 1306 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); |
a80b95ba | 1307 | |
bb00b29d TG |
1308 | if (inf != NULL && thread != NULL |
1309 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1310 | { |
bb00b29d TG |
1311 | if (thread->single_step |
1312 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) | |
1313 | { | |
1314 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1315 | darwin_send_reply (inf, thread); | |
1316 | thread->msg_state = DARWIN_RUNNING; | |
1317 | } | |
1318 | else | |
1319 | inferior_debug | |
c8c9911f | 1320 | (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"), |
bb00b29d | 1321 | thread->gdb_port); |
a80b95ba | 1322 | } |
bb00b29d TG |
1323 | else |
1324 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1325 | } | |
1326 | return res; | |
1327 | } | |
a80b95ba | 1328 | |
bb00b29d | 1329 | static ptid_t |
a6290449 | 1330 | darwin_wait_to (struct target_ops *ops, |
bb00b29d TG |
1331 | ptid_t ptid, struct target_waitstatus *status, int options) |
1332 | { | |
1333 | return darwin_wait (ptid, status); | |
1334 | } | |
a80b95ba | 1335 | |
bb00b29d | 1336 | static void |
bfedc46a | 1337 | darwin_interrupt (struct target_ops *self, ptid_t t) |
bb00b29d TG |
1338 | { |
1339 | struct inferior *inf = current_inferior (); | |
a80b95ba | 1340 | |
bb00b29d | 1341 | /* FIXME: handle in no_ptrace mode. */ |
fe978cb0 | 1342 | gdb_assert (!inf->priv->no_ptrace); |
bb00b29d | 1343 | kill (inf->pid, SIGINT); |
a80b95ba TG |
1344 | } |
1345 | ||
82b19a4d TG |
1346 | /* Deallocate threads port and vector. */ |
1347 | ||
a80b95ba | 1348 | static void |
82b19a4d | 1349 | darwin_deallocate_threads (struct inferior *inf) |
a80b95ba | 1350 | { |
fe978cb0 | 1351 | if (inf->priv->threads) |
a80b95ba | 1352 | { |
82b19a4d | 1353 | kern_return_t kret; |
a80b95ba | 1354 | int k; |
bb00b29d TG |
1355 | darwin_thread_t *t; |
1356 | for (k = 0; | |
fe978cb0 | 1357 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d | 1358 | k++) |
a80b95ba | 1359 | { |
bb00b29d | 1360 | kret = mach_port_deallocate (gdb_task, t->gdb_port); |
a80b95ba TG |
1361 | MACH_CHECK_ERROR (kret); |
1362 | } | |
fe978cb0 PA |
1363 | VEC_free (darwin_thread_t, inf->priv->threads); |
1364 | inf->priv->threads = NULL; | |
a80b95ba | 1365 | } |
82b19a4d | 1366 | } |
a80b95ba | 1367 | |
82b19a4d TG |
1368 | static void |
1369 | darwin_mourn_inferior (struct target_ops *ops) | |
1370 | { | |
1371 | struct inferior *inf = current_inferior (); | |
1372 | kern_return_t kret; | |
1373 | mach_port_t prev; | |
1374 | int i; | |
1375 | ||
1376 | /* Deallocate threads. */ | |
1377 | darwin_deallocate_threads (inf); | |
1378 | ||
1379 | /* Remove notify_port from darwin_port_set. */ | |
bb00b29d | 1380 | kret = mach_port_move_member (gdb_task, |
fe978cb0 | 1381 | inf->priv->notify_port, MACH_PORT_NULL); |
fda184b6 | 1382 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1383 | |
82b19a4d | 1384 | /* Remove task port dead_name notification. */ |
fe978cb0 | 1385 | kret = mach_port_request_notification (gdb_task, inf->priv->task, |
a80b95ba | 1386 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1387 | MACH_PORT_NULL, |
a80b95ba TG |
1388 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1389 | &prev); | |
1390 | /* This can fail if the task is dead. */ | |
c8c9911f | 1391 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
fe978cb0 | 1392 | inf->priv->task, prev, inf->priv->notify_port); |
bb00b29d | 1393 | |
a80b95ba TG |
1394 | if (kret == KERN_SUCCESS) |
1395 | { | |
1396 | kret = mach_port_deallocate (gdb_task, prev); | |
1397 | MACH_CHECK_ERROR (kret); | |
1398 | } | |
1399 | ||
82b19a4d | 1400 | /* Destroy notify_port. */ |
fe978cb0 | 1401 | kret = mach_port_destroy (gdb_task, inf->priv->notify_port); |
bb00b29d TG |
1402 | MACH_CHECK_ERROR (kret); |
1403 | ||
a80b95ba | 1404 | /* Deallocate saved exception ports. */ |
82b19a4d | 1405 | darwin_deallocate_exception_ports (inf->priv); |
a80b95ba | 1406 | |
82b19a4d | 1407 | /* Deallocate task port. */ |
fe978cb0 | 1408 | kret = mach_port_deallocate (gdb_task, inf->priv->task); |
a80b95ba TG |
1409 | MACH_CHECK_ERROR (kret); |
1410 | ||
fe978cb0 PA |
1411 | xfree (inf->priv); |
1412 | inf->priv = NULL; | |
a80b95ba | 1413 | |
c1ee2fb3 | 1414 | inf_child_mourn_inferior (ops); |
a80b95ba TG |
1415 | } |
1416 | ||
1417 | static void | |
bb00b29d | 1418 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1419 | { |
bb00b29d TG |
1420 | int k; |
1421 | darwin_thread_t *t; | |
a80b95ba | 1422 | |
bb00b29d | 1423 | for (k = 0; |
fe978cb0 | 1424 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
1425 | k++) |
1426 | { | |
1427 | if (t->msg_state == DARWIN_MESSAGE) | |
1428 | darwin_resume_thread (inf, t, 0, 0); | |
1429 | } | |
a80b95ba TG |
1430 | } |
1431 | ||
1432 | static void | |
bb00b29d | 1433 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1434 | { |
1435 | struct target_waitstatus wstatus; | |
1436 | ptid_t ptid; | |
1437 | kern_return_t kret; | |
1438 | int status; | |
1439 | int res; | |
1440 | ||
bb00b29d | 1441 | gdb_assert (inf != NULL); |
a80b95ba | 1442 | |
bb00b29d | 1443 | darwin_suspend_inferior (inf); |
a80b95ba | 1444 | |
bb00b29d | 1445 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1446 | |
fe978cb0 | 1447 | if (inf->priv->no_ptrace) |
bb00b29d | 1448 | return; |
a80b95ba | 1449 | |
bb00b29d TG |
1450 | res = kill (inf->pid, SIGSTOP); |
1451 | if (res != 0) | |
b37520b6 | 1452 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1453 | |
bb00b29d TG |
1454 | /* Wait until the process is really stopped. */ |
1455 | while (1) | |
a80b95ba | 1456 | { |
bb00b29d TG |
1457 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1458 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 1459 | && wstatus.value.sig == GDB_SIGNAL_STOP) |
bb00b29d | 1460 | break; |
a80b95ba TG |
1461 | } |
1462 | } | |
1463 | ||
1464 | static kern_return_t | |
1465 | darwin_save_exception_ports (darwin_inferior *inf) | |
1466 | { | |
1467 | kern_return_t kret; | |
1468 | ||
1469 | inf->exception_info.count = | |
1470 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1471 | ||
1472 | kret = task_get_exception_ports | |
1473 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1474 | &inf->exception_info.count, inf->exception_info.ports, | |
1475 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1476 | return kret; | |
1477 | } | |
1478 | ||
1479 | static kern_return_t | |
1480 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1481 | { | |
1482 | int i; | |
1483 | kern_return_t kret; | |
1484 | ||
1485 | for (i = 0; i < inf->exception_info.count; i++) | |
1486 | { | |
1487 | kret = task_set_exception_ports | |
1488 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1489 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1490 | if (kret != KERN_SUCCESS) | |
1491 | return kret; | |
1492 | } | |
1493 | ||
1494 | return KERN_SUCCESS; | |
1495 | } | |
1496 | ||
82b19a4d TG |
1497 | /* Deallocate saved exception ports. */ |
1498 | ||
1499 | static void | |
1500 | darwin_deallocate_exception_ports (darwin_inferior *inf) | |
1501 | { | |
1502 | int i; | |
1503 | kern_return_t kret; | |
1504 | ||
1505 | for (i = 0; i < inf->exception_info.count; i++) | |
1506 | { | |
1507 | kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]); | |
1508 | MACH_CHECK_ERROR (kret); | |
1509 | } | |
1510 | inf->exception_info.count = 0; | |
1511 | } | |
1512 | ||
1513 | static void | |
1514 | darwin_setup_exceptions (struct inferior *inf) | |
1515 | { | |
1516 | kern_return_t kret; | |
1517 | int traps_expected; | |
1518 | exception_mask_t mask; | |
1519 | ||
1520 | kret = darwin_save_exception_ports (inf->priv); | |
1521 | if (kret != KERN_SUCCESS) | |
1522 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1523 | "returned: %d"), | |
1524 | kret); | |
1525 | ||
1526 | /* Set exception port. */ | |
1527 | if (enable_mach_exceptions) | |
1528 | mask = EXC_MASK_ALL; | |
1529 | else | |
1530 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
1531 | kret = task_set_exception_ports (inf->priv->task, mask, darwin_ex_port, | |
1532 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); | |
1533 | if (kret != KERN_SUCCESS) | |
1534 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1535 | "returned: %d"), | |
1536 | kret); | |
1537 | } | |
1538 | ||
a80b95ba | 1539 | static void |
bb00b29d TG |
1540 | darwin_kill_inferior (struct target_ops *ops) |
1541 | { | |
1542 | struct inferior *inf = current_inferior (); | |
1543 | struct target_waitstatus wstatus; | |
1544 | ptid_t ptid; | |
1545 | kern_return_t kret; | |
1546 | int status; | |
1547 | int res; | |
1548 | ||
1549 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1550 | return; | |
1551 | ||
1552 | gdb_assert (inf != NULL); | |
1553 | ||
fe978cb0 | 1554 | kret = darwin_restore_exception_ports (inf->priv); |
ee41036f | 1555 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1556 | |
ee41036f | 1557 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1558 | |
ee41036f | 1559 | res = kill (inf->pid, 9); |
bb00b29d | 1560 | |
ee41036f | 1561 | if (res == 0) |
bb00b29d | 1562 | { |
bb00b29d | 1563 | darwin_resume_inferior (inf); |
a6290449 | 1564 | |
bb00b29d TG |
1565 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1566 | } | |
ee41036f TG |
1567 | else if (errno != ESRCH) |
1568 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1569 | inf->pid, safe_strerror (errno)); | |
bb00b29d | 1570 | |
bc1e6c81 | 1571 | target_mourn_inferior (inferior_ptid); |
bb00b29d TG |
1572 | } |
1573 | ||
82b19a4d TG |
1574 | static void |
1575 | darwin_setup_request_notification (struct inferior *inf) | |
1576 | { | |
1577 | kern_return_t kret; | |
1578 | mach_port_t prev_not; | |
1579 | ||
1580 | kret = mach_port_request_notification (gdb_task, inf->priv->task, | |
1581 | MACH_NOTIFY_DEAD_NAME, 0, | |
1582 | inf->priv->notify_port, | |
1583 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
1584 | &prev_not); | |
1585 | if (kret != KERN_SUCCESS) | |
1586 | error (_("Termination notification request failed, " | |
1587 | "mach_port_request_notification\n" | |
1588 | "returned: %d"), | |
1589 | kret); | |
1590 | if (prev_not != MACH_PORT_NULL) | |
1591 | { | |
1592 | /* This is unexpected, as there should not be any previously | |
1593 | registered notification request. But this is not a fatal | |
1594 | issue, so just emit a warning. */ | |
1595 | warning (_("\ | |
1596 | A task termination request was registered before the debugger registered\n\ | |
1597 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1598 | impact on the debugging session.")); | |
1599 | } | |
1600 | } | |
1601 | ||
bb00b29d TG |
1602 | static void |
1603 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1604 | { |
a80b95ba TG |
1605 | kern_return_t kret; |
1606 | mach_port_t prev_port; | |
1607 | int traps_expected; | |
bb00b29d | 1608 | mach_port_t prev_not; |
a80b95ba TG |
1609 | exception_mask_t mask; |
1610 | ||
fe978cb0 | 1611 | inf->priv = XCNEW (darwin_inferior); |
bb00b29d | 1612 | |
fe978cb0 | 1613 | kret = task_for_pid (gdb_task, inf->pid, &inf->priv->task); |
a80b95ba TG |
1614 | if (kret != KERN_SUCCESS) |
1615 | { | |
1616 | int status; | |
a80b95ba TG |
1617 | |
1618 | if (!inf->attach_flag) | |
1619 | { | |
bb00b29d TG |
1620 | kill (inf->pid, 9); |
1621 | waitpid (inf->pid, &status, 0); | |
a80b95ba TG |
1622 | } |
1623 | ||
1624 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
15c19d39 | 1625 | " (please check gdb is codesigned - see taskgated(8))"), |
bb00b29d | 1626 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
a80b95ba TG |
1627 | } |
1628 | ||
bb00b29d | 1629 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
fe978cb0 | 1630 | inf->priv->task, inf->pid); |
a80b95ba TG |
1631 | |
1632 | if (darwin_ex_port == MACH_PORT_NULL) | |
1633 | { | |
1634 | /* Create a port to get exceptions. */ | |
1635 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1636 | &darwin_ex_port); | |
fda184b6 JB |
1637 | if (kret != KERN_SUCCESS) |
1638 | error (_("Unable to create exception port, mach_port_allocate " | |
1639 | "returned: %d"), | |
1640 | kret); | |
a80b95ba TG |
1641 | |
1642 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, | |
1643 | MACH_MSG_TYPE_MAKE_SEND); | |
fda184b6 JB |
1644 | if (kret != KERN_SUCCESS) |
1645 | error (_("Unable to create exception port, mach_port_insert_right " | |
1646 | "returned: %d"), | |
1647 | kret); | |
a80b95ba TG |
1648 | |
1649 | /* Create a port set and put ex_port in it. */ | |
1650 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1651 | &darwin_port_set); | |
fda184b6 JB |
1652 | if (kret != KERN_SUCCESS) |
1653 | error (_("Unable to create port set, mach_port_allocate " | |
1654 | "returned: %d"), | |
1655 | kret); | |
a80b95ba TG |
1656 | |
1657 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); | |
fda184b6 JB |
1658 | if (kret != KERN_SUCCESS) |
1659 | error (_("Unable to move exception port into new port set, " | |
1660 | "mach_port_move_member\n" | |
1661 | "returned: %d"), | |
1662 | kret); | |
bb00b29d | 1663 | } |
a80b95ba | 1664 | |
bb00b29d TG |
1665 | /* Create a port to be notified when the child task terminates. */ |
1666 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
fe978cb0 | 1667 | &inf->priv->notify_port); |
fda184b6 JB |
1668 | if (kret != KERN_SUCCESS) |
1669 | error (_("Unable to create notification port, mach_port_allocate " | |
1670 | "returned: %d"), | |
1671 | kret); | |
a80b95ba | 1672 | |
bb00b29d | 1673 | kret = mach_port_move_member (gdb_task, |
fe978cb0 | 1674 | inf->priv->notify_port, darwin_port_set); |
fda184b6 JB |
1675 | if (kret != KERN_SUCCESS) |
1676 | error (_("Unable to move notification port into new port set, " | |
1677 | "mach_port_move_member\n" | |
1678 | "returned: %d"), | |
1679 | kret); | |
a80b95ba | 1680 | |
82b19a4d | 1681 | darwin_setup_request_notification (inf); |
a80b95ba | 1682 | |
82b19a4d | 1683 | darwin_setup_exceptions (inf); |
a80b95ba | 1684 | |
6a3cb8e8 PA |
1685 | if (!target_is_pushed (darwin_ops)) |
1686 | push_target (darwin_ops); | |
a80b95ba TG |
1687 | } |
1688 | ||
db665f42 SM |
1689 | /* Get the thread_info object corresponding to this private_thread_info. */ |
1690 | ||
1691 | static struct thread_info * | |
1692 | thread_info_from_private_thread_info (private_thread_info *pti) | |
1693 | { | |
1694 | struct thread_info *it; | |
1695 | ||
1696 | ALL_THREADS (it) | |
1697 | { | |
1698 | if (it->priv->gdb_port == pti->gdb_port) | |
1699 | break; | |
1700 | } | |
1701 | ||
1702 | gdb_assert (it != NULL); | |
1703 | ||
1704 | return it; | |
1705 | } | |
1706 | ||
a80b95ba | 1707 | static void |
bb00b29d | 1708 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1709 | { |
a80b95ba TG |
1710 | darwin_check_new_threads (inf); |
1711 | ||
db665f42 SM |
1712 | gdb_assert (inf->priv->threads != NULL); |
1713 | gdb_assert (VEC_length (darwin_thread_t, inf->priv->threads) > 0); | |
bb00b29d | 1714 | |
db665f42 SM |
1715 | private_thread_info *first_pti |
1716 | = VEC_index (darwin_thread_t, inf->priv->threads, 0); | |
1717 | struct thread_info *first_thread | |
1718 | = thread_info_from_private_thread_info (first_pti); | |
1719 | ||
1720 | inferior_ptid = first_thread->ptid; | |
bb00b29d TG |
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 TG |
1836 | { |
1837 | /* Do the hard work. */ | |
db665f42 SM |
1838 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, |
1839 | darwin_ptrace_him, darwin_pre_ptrace, NULL, | |
1840 | darwin_execvp); | |
a80b95ba TG |
1841 | } |
1842 | \f | |
1843 | ||
726ce67c JB |
1844 | /* Set things up such that the next call to darwin_wait will immediately |
1845 | return a fake stop event for inferior INF. | |
1846 | ||
1847 | This assumes that the inferior's thread list has been initialized, | |
1848 | as it will suspend the inferior's first thread. */ | |
1849 | ||
1850 | static void | |
1851 | darwin_setup_fake_stop_event (struct inferior *inf) | |
1852 | { | |
1853 | darwin_thread_t *thread; | |
1854 | kern_return_t kret; | |
1855 | ||
1856 | gdb_assert (darwin_inf_fake_stop == NULL); | |
1857 | darwin_inf_fake_stop = inf; | |
1858 | ||
1859 | /* When detecting a fake pending stop event, darwin_wait returns | |
1860 | an event saying that the first thread is in a DARWIN_STOPPED | |
1861 | state. To make that accurate, we need to suspend that thread | |
1862 | as well. Otherwise, we'll try resuming it when resuming the | |
1863 | inferior, and get a warning because the thread's suspend count | |
1864 | is already zero, making the resume request useless. */ | |
fe978cb0 | 1865 | thread = VEC_index (darwin_thread_t, inf->priv->threads, 0); |
726ce67c JB |
1866 | kret = thread_suspend (thread->gdb_port); |
1867 | MACH_CHECK_ERROR (kret); | |
1868 | } | |
1869 | ||
a80b95ba TG |
1870 | /* Attach to process PID, then initialize for debugging it |
1871 | and wait for the trace-trap that results from attaching. */ | |
1872 | static void | |
c0939df1 | 1873 | darwin_attach (struct target_ops *ops, const char *args, int from_tty) |
a80b95ba TG |
1874 | { |
1875 | pid_t pid; | |
1876 | pid_t pid2; | |
1877 | int wstatus; | |
1878 | int res; | |
1879 | struct inferior *inf; | |
bb00b29d | 1880 | kern_return_t kret; |
a80b95ba | 1881 | |
74164c56 | 1882 | pid = parse_pid_to_attach (args); |
a80b95ba | 1883 | |
74164c56 | 1884 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1885 | error (_("I refuse to debug myself!")); |
1886 | ||
1887 | if (from_tty) | |
bb00b29d TG |
1888 | { |
1889 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1890 | |
bb00b29d TG |
1891 | if (exec_file) |
1892 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
1893 | target_pid_to_str (pid_to_ptid (pid))); | |
1894 | else | |
1895 | printf_unfiltered (_("Attaching to %s\n"), | |
1896 | target_pid_to_str (pid_to_ptid (pid))); | |
1897 | ||
1898 | gdb_flush (gdb_stdout); | |
1899 | } | |
1900 | ||
1901 | if (pid == 0 || kill (pid, 0) < 0) | |
1902 | error (_("Can't attach to process %d: %s (%d)"), | |
1903 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1904 | |
bb00b29d | 1905 | inferior_ptid = pid_to_ptid (pid); |
6c95b8df PA |
1906 | inf = current_inferior (); |
1907 | inferior_appeared (inf, pid); | |
a80b95ba | 1908 | inf->attach_flag = 1; |
6c95b8df | 1909 | |
bb00b29d | 1910 | darwin_attach_pid (inf); |
a80b95ba | 1911 | |
bb00b29d | 1912 | darwin_suspend_inferior (inf); |
a80b95ba | 1913 | |
bb00b29d | 1914 | darwin_init_thread_list (inf); |
a80b95ba | 1915 | |
fe978cb0 | 1916 | darwin_check_osabi (inf->priv, ptid_get_tid (inferior_ptid)); |
a80b95ba | 1917 | |
726ce67c JB |
1918 | darwin_setup_fake_stop_event (inf); |
1919 | ||
fe978cb0 | 1920 | inf->priv->no_ptrace = 1; |
a80b95ba TG |
1921 | } |
1922 | ||
1923 | /* Take a program previously attached to and detaches it. | |
1924 | The program resumes execution and will no longer stop | |
1925 | on signals, etc. We'd better not have left any breakpoints | |
1926 | in the program or it'll die when it hits one. For this | |
1927 | to work, it may be necessary for the process to have been | |
1928 | previously attached. It *might* work if the program was | |
1929 | started via fork. */ | |
1930 | static void | |
52554a0e | 1931 | darwin_detach (struct target_ops *ops, const char *args, int from_tty) |
a80b95ba | 1932 | { |
bb00b29d TG |
1933 | pid_t pid = ptid_get_pid (inferior_ptid); |
1934 | struct inferior *inf = current_inferior (); | |
a80b95ba TG |
1935 | kern_return_t kret; |
1936 | int res; | |
1937 | ||
bb00b29d | 1938 | /* Display message. */ |
0f48b757 | 1939 | target_announce_detach (from_tty); |
a80b95ba | 1940 | |
bb00b29d | 1941 | /* If ptrace() is in use, stop the process. */ |
fe978cb0 | 1942 | if (!inf->priv->no_ptrace) |
bb00b29d | 1943 | darwin_stop_inferior (inf); |
a80b95ba | 1944 | |
fe978cb0 | 1945 | kret = darwin_restore_exception_ports (inf->priv); |
a80b95ba TG |
1946 | MACH_CHECK_ERROR (kret); |
1947 | ||
fe978cb0 | 1948 | if (!inf->priv->no_ptrace) |
a80b95ba | 1949 | { |
bb00b29d TG |
1950 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1951 | if (res != 0) | |
1952 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1953 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1954 | } |
1955 | ||
bb00b29d | 1956 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1957 | |
5e9bc145 JB |
1958 | /* When using ptrace, we have just performed a PT_DETACH, which |
1959 | resumes the inferior. On the other hand, when we are not using | |
1960 | ptrace, we need to resume its execution ourselves. */ | |
fe978cb0 | 1961 | if (inf->priv->no_ptrace) |
5e9bc145 | 1962 | darwin_resume_inferior (inf); |
a80b95ba TG |
1963 | |
1964 | darwin_mourn_inferior (ops); | |
1965 | } | |
1966 | ||
1967 | static void | |
1968 | darwin_files_info (struct target_ops *ops) | |
1969 | { | |
a80b95ba TG |
1970 | } |
1971 | ||
7a114964 | 1972 | static const char * |
117de6a9 | 1973 | darwin_pid_to_str (struct target_ops *ops, ptid_t ptid) |
a80b95ba | 1974 | { |
bb00b29d TG |
1975 | static char buf[80]; |
1976 | long tid = ptid_get_tid (ptid); | |
1977 | ||
1978 | if (tid != 0) | |
1979 | { | |
1980 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
1981 | tid, ptid_get_pid (ptid)); | |
1982 | return buf; | |
1983 | } | |
a80b95ba | 1984 | |
bb00b29d | 1985 | return normal_pid_to_str (ptid); |
a80b95ba TG |
1986 | } |
1987 | ||
1988 | static int | |
28439f5e | 1989 | darwin_thread_alive (struct target_ops *ops, ptid_t ptid) |
a80b95ba TG |
1990 | { |
1991 | return 1; | |
1992 | } | |
1993 | ||
1994 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
1995 | copy it to RDADDR in gdb's address space. | |
1996 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
1997 | to ADDR in inferior task's address space. | |
f00c55f8 | 1998 | Return 0 on failure; number of bytes read / writen otherwise. */ |
3eb831e0 | 1999 | |
a80b95ba TG |
2000 | static int |
2001 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 2002 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 2003 | ULONGEST length) |
a80b95ba | 2004 | { |
bb00b29d | 2005 | kern_return_t kret; |
3eb831e0 | 2006 | mach_vm_size_t res_length = 0; |
a80b95ba | 2007 | pointer_t copied; |
b9dd1947 | 2008 | mach_msg_type_number_t copy_count; |
a80b95ba TG |
2009 | mach_vm_size_t remaining_length; |
2010 | mach_vm_address_t region_address; | |
2011 | mach_vm_size_t region_length; | |
2012 | ||
b55e14c7 YQ |
2013 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
2014 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 2015 | |
3eb831e0 TG |
2016 | /* First read. */ |
2017 | if (rdaddr != NULL) | |
a80b95ba | 2018 | { |
3eb831e0 | 2019 | mach_vm_size_t count; |
a80b95ba | 2020 | |
3eb831e0 TG |
2021 | /* According to target.h(to_xfer_partial), one and only one may be |
2022 | non-null. */ | |
2023 | gdb_assert (wraddr == NULL); | |
a80b95ba | 2024 | |
3eb831e0 TG |
2025 | kret = mach_vm_read_overwrite (task, addr, length, |
2026 | (mach_vm_address_t) rdaddr, &count); | |
2027 | if (kret != KERN_SUCCESS) | |
2028 | { | |
2029 | inferior_debug | |
2030 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
2031 | core_addr_to_string (addr), mach_error_string (kret)); | |
2032 | return 0; | |
2033 | } | |
2034 | return count; | |
2035 | } | |
a80b95ba | 2036 | |
3eb831e0 TG |
2037 | /* See above. */ |
2038 | gdb_assert (wraddr != NULL); | |
a80b95ba | 2039 | |
3eb831e0 | 2040 | while (length != 0) |
a80b95ba | 2041 | { |
3eb831e0 TG |
2042 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
2043 | mach_vm_address_t region_address = (mach_vm_address_t) (addr - offset); | |
2044 | mach_vm_size_t aligned_length = | |
2045 | (mach_vm_size_t) PAGE_ROUND (offset + length); | |
bb00b29d | 2046 | vm_region_submap_short_info_data_64_t info; |
3eb831e0 TG |
2047 | mach_msg_type_number_t count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; |
2048 | natural_t region_depth = 1000; | |
bb00b29d | 2049 | mach_vm_address_t region_start = region_address; |
3eb831e0 TG |
2050 | mach_vm_size_t region_length; |
2051 | mach_vm_size_t write_length; | |
bb00b29d | 2052 | |
3eb831e0 | 2053 | /* Read page protection. */ |
bb00b29d TG |
2054 | kret = mach_vm_region_recurse |
2055 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
2056 | (vm_region_recurse_info_t) &info, &count); | |
2057 | ||
2058 | if (kret != KERN_SUCCESS) | |
a80b95ba | 2059 | { |
bb00b29d TG |
2060 | inferior_debug (1, _("darwin_read_write_inferior: " |
2061 | "mach_vm_region_recurse failed at %s: %s\n"), | |
2062 | core_addr_to_string (region_address), | |
2063 | mach_error_string (kret)); | |
3eb831e0 | 2064 | return res_length; |
a80b95ba TG |
2065 | } |
2066 | ||
bb00b29d TG |
2067 | inferior_debug |
2068 | (9, _("darwin_read_write_inferior: " | |
2069 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
2070 | core_addr_to_string (region_address), | |
2071 | core_addr_to_string (region_start), | |
2072 | core_addr_to_string (region_length)); | |
2073 | ||
0963b4bd | 2074 | /* Check for holes in memory. */ |
bb00b29d | 2075 | if (region_start > region_address) |
a80b95ba | 2076 | { |
0963b4bd | 2077 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 2078 | core_addr_to_string (region_address), |
bb00b29d | 2079 | core_addr_to_string (region_start), |
a80b95ba | 2080 | (unsigned)region_length); |
3eb831e0 | 2081 | return res_length; |
a80b95ba TG |
2082 | } |
2083 | ||
bb00b29d TG |
2084 | /* Adjust the length. */ |
2085 | region_length -= (region_address - region_start); | |
3eb831e0 TG |
2086 | if (region_length > aligned_length) |
2087 | region_length = aligned_length; | |
bb00b29d | 2088 | |
3eb831e0 TG |
2089 | /* Make the pages RW. */ |
2090 | if (!(info.protection & VM_PROT_WRITE)) | |
a80b95ba | 2091 | { |
3eb831e0 TG |
2092 | vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE; |
2093 | ||
2094 | kret = mach_vm_protect (task, region_address, region_length, | |
2095 | FALSE, prot); | |
bb00b29d TG |
2096 | if (kret != KERN_SUCCESS) |
2097 | { | |
3eb831e0 TG |
2098 | prot |= VM_PROT_COPY; |
2099 | kret = mach_vm_protect (task, region_address, region_length, | |
2100 | FALSE, prot); | |
2101 | } | |
2102 | if (kret != KERN_SUCCESS) | |
2103 | { | |
2104 | warning (_("darwin_read_write_inferior: " | |
2105 | "mach_vm_protect failed at %s " | |
2106 | "(len=0x%lx, prot=0x%x): %s"), | |
bb00b29d | 2107 | core_addr_to_string (region_address), |
3eb831e0 | 2108 | (unsigned long) region_length, (unsigned) prot, |
bb00b29d | 2109 | mach_error_string (kret)); |
3eb831e0 | 2110 | return res_length; |
bb00b29d | 2111 | } |
a80b95ba TG |
2112 | } |
2113 | ||
3eb831e0 TG |
2114 | if (offset + length > region_length) |
2115 | write_length = region_length - offset; | |
2116 | else | |
2117 | write_length = length; | |
2118 | ||
2119 | /* Write. */ | |
2120 | kret = mach_vm_write (task, addr, (vm_offset_t) wraddr, write_length); | |
2121 | if (kret != KERN_SUCCESS) | |
2122 | { | |
2123 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
2124 | mach_error_string (kret)); | |
2125 | return res_length; | |
2126 | } | |
2127 | ||
2128 | /* Restore page rights. */ | |
a80b95ba TG |
2129 | if (!(info.protection & VM_PROT_WRITE)) |
2130 | { | |
bb00b29d | 2131 | kret = mach_vm_protect (task, region_address, region_length, |
3eb831e0 | 2132 | FALSE, info.protection); |
bb00b29d | 2133 | if (kret != KERN_SUCCESS) |
a80b95ba | 2134 | { |
3eb831e0 TG |
2135 | warning (_("darwin_read_write_inferior: " |
2136 | "mach_vm_protect restore failed at %s " | |
2137 | "(len=0x%lx): %s"), | |
bb00b29d | 2138 | core_addr_to_string (region_address), |
3eb831e0 TG |
2139 | (unsigned long) region_length, |
2140 | mach_error_string (kret)); | |
a80b95ba TG |
2141 | } |
2142 | } | |
a80b95ba | 2143 | |
3eb831e0 TG |
2144 | addr += write_length; |
2145 | wraddr += write_length; | |
2146 | res_length += write_length; | |
2147 | length -= write_length; | |
a80b95ba | 2148 | } |
3eb831e0 TG |
2149 | |
2150 | return res_length; | |
a80b95ba TG |
2151 | } |
2152 | ||
f00c55f8 | 2153 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
ad2073b0 | 2154 | to RDADDR (in big endian). |
569283d4 | 2155 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 2156 | |
b967eb24 | 2157 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 2158 | /* This is not available in Darwin 9. */ |
9b409511 | 2159 | static enum target_xfer_status |
b9dd1947 | 2160 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 2161 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
2162 | { |
2163 | struct task_dyld_info task_dyld_info; | |
2164 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
2165 | int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t); | |
2166 | kern_return_t kret; | |
2167 | ||
ad2073b0 | 2168 | if (addr != 0 || length > sizeof (mach_vm_address_t)) |
9b409511 | 2169 | return TARGET_XFER_EOF; |
f00c55f8 | 2170 | |
ad2073b0 TG |
2171 | kret = task_info (task, TASK_DYLD_INFO, |
2172 | (task_info_t) &task_dyld_info, &count); | |
f00c55f8 TG |
2173 | MACH_CHECK_ERROR (kret); |
2174 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 2175 | return TARGET_XFER_E_IO; |
ad2073b0 TG |
2176 | |
2177 | store_unsigned_integer (rdaddr, length, BFD_ENDIAN_BIG, | |
2178 | task_dyld_info.all_image_info_addr); | |
9b409511 YQ |
2179 | *xfered_len = (ULONGEST) length; |
2180 | return TARGET_XFER_OK; | |
f00c55f8 | 2181 | } |
569283d4 | 2182 | #endif |
f00c55f8 | 2183 | |
a80b95ba | 2184 | \f |
a80b95ba | 2185 | |
1b281443 | 2186 | static enum target_xfer_status |
a80b95ba TG |
2187 | darwin_xfer_partial (struct target_ops *ops, |
2188 | enum target_object object, const char *annex, | |
2189 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 2190 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
a80b95ba | 2191 | { |
bb00b29d TG |
2192 | struct inferior *inf = current_inferior (); |
2193 | ||
2194 | inferior_debug | |
b55e14c7 YQ |
2195 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
2196 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
2197 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
2198 | inf->pid); | |
a80b95ba | 2199 | |
f00c55f8 TG |
2200 | switch (object) |
2201 | { | |
2202 | case TARGET_OBJECT_MEMORY: | |
9b409511 | 2203 | { |
fe978cb0 | 2204 | int l = darwin_read_write_inferior (inf->priv->task, offset, |
9b409511 YQ |
2205 | readbuf, writebuf, len); |
2206 | ||
2207 | if (l == 0) | |
2208 | return TARGET_XFER_EOF; | |
2209 | else | |
2210 | { | |
2211 | gdb_assert (l > 0); | |
2212 | *xfered_len = (ULONGEST) l; | |
2213 | return TARGET_XFER_OK; | |
2214 | } | |
2215 | } | |
569283d4 | 2216 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
2217 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
2218 | if (writebuf != NULL || readbuf == NULL) | |
2219 | { | |
2220 | /* Support only read. */ | |
2ed4b548 | 2221 | return TARGET_XFER_E_IO; |
f00c55f8 | 2222 | } |
fe978cb0 | 2223 | return darwin_read_dyld_info (inf->priv->task, offset, readbuf, len, |
9b409511 | 2224 | xfered_len); |
569283d4 | 2225 | #endif |
f00c55f8 | 2226 | default: |
2ed4b548 | 2227 | return TARGET_XFER_E_IO; |
f00c55f8 | 2228 | } |
a80b95ba | 2229 | |
a80b95ba TG |
2230 | } |
2231 | ||
2232 | static void | |
2233 | set_enable_mach_exceptions (char *args, int from_tty, | |
2234 | struct cmd_list_element *c) | |
2235 | { | |
bb00b29d | 2236 | if (!ptid_equal (inferior_ptid, null_ptid)) |
a80b95ba | 2237 | { |
bb00b29d | 2238 | struct inferior *inf = current_inferior (); |
a80b95ba TG |
2239 | exception_mask_t mask; |
2240 | kern_return_t kret; | |
2241 | ||
2242 | if (enable_mach_exceptions) | |
2243 | mask = EXC_MASK_ALL; | |
2244 | else | |
2245 | { | |
fe978cb0 | 2246 | darwin_restore_exception_ports (inf->priv); |
bb00b29d | 2247 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
a80b95ba | 2248 | } |
fe978cb0 | 2249 | kret = task_set_exception_ports (inf->priv->task, mask, darwin_ex_port, |
a80b95ba TG |
2250 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2251 | MACH_CHECK_ERROR (kret); | |
2252 | } | |
2253 | } | |
2254 | ||
bb00b29d | 2255 | static char * |
8dd27370 | 2256 | darwin_pid_to_exec_file (struct target_ops *self, int pid) |
bb00b29d | 2257 | { |
b4ab256d | 2258 | static char path[PATH_MAX]; |
bb00b29d TG |
2259 | int res; |
2260 | ||
d8d2a3ee | 2261 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2262 | if (res >= 0) |
2263 | return path; | |
2264 | else | |
2265 | return NULL; | |
2266 | } | |
2267 | ||
2268 | static ptid_t | |
1e6b91a4 | 2269 | darwin_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) |
bb00b29d TG |
2270 | { |
2271 | int i; | |
2272 | darwin_thread_t *t; | |
2273 | int k; | |
2274 | struct inferior *inf = current_inferior (); | |
2275 | kern_return_t kret; | |
2276 | mach_port_name_array_t names; | |
2277 | mach_msg_type_number_t names_count; | |
2278 | mach_port_type_array_t types; | |
2279 | mach_msg_type_number_t types_count; | |
2280 | long res = 0; | |
2281 | ||
2282 | /* First linear search. */ | |
2283 | for (k = 0; | |
fe978cb0 | 2284 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
2285 | k++) |
2286 | if (t->inf_port == lwp) | |
2287 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); | |
2288 | ||
2289 | /* Maybe the port was never extract. Do it now. */ | |
2290 | ||
2291 | /* First get inferior port names. */ | |
fe978cb0 | 2292 | kret = mach_port_names (inf->priv->task, &names, &names_count, &types, |
bb00b29d TG |
2293 | &types_count); |
2294 | MACH_CHECK_ERROR (kret); | |
2295 | if (kret != KERN_SUCCESS) | |
2296 | return null_ptid; | |
2297 | ||
2298 | /* For each name, copy the right in the gdb space and then compare with | |
2299 | our view of the inferior threads. We don't forget to deallocate the | |
2300 | right. */ | |
2301 | for (i = 0; i < names_count; i++) | |
2302 | { | |
2303 | mach_port_t local_name; | |
2304 | mach_msg_type_name_t local_type; | |
2305 | ||
2306 | /* We just need to know the corresponding name in gdb name space. | |
2307 | So extract and deallocate the right. */ | |
fe978cb0 | 2308 | kret = mach_port_extract_right (inf->priv->task, names[i], |
bb00b29d TG |
2309 | MACH_MSG_TYPE_COPY_SEND, |
2310 | &local_name, &local_type); | |
2311 | if (kret != KERN_SUCCESS) | |
2312 | continue; | |
2313 | mach_port_deallocate (gdb_task, local_name); | |
2314 | ||
2315 | for (k = 0; | |
fe978cb0 | 2316 | VEC_iterate (darwin_thread_t, inf->priv->threads, k, t); |
bb00b29d TG |
2317 | k++) |
2318 | if (t->gdb_port == local_name) | |
2319 | { | |
2320 | t->inf_port = names[i]; | |
2321 | if (names[i] == lwp) | |
2322 | res = t->gdb_port; | |
2323 | } | |
2324 | } | |
2325 | ||
2326 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2327 | names_count * sizeof (mach_port_t)); | |
2328 | ||
2329 | if (res) | |
2330 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); | |
2331 | else | |
2332 | return null_ptid; | |
2333 | } | |
2334 | ||
2335 | static int | |
86ce2668 | 2336 | darwin_supports_multi_process (struct target_ops *self) |
bb00b29d TG |
2337 | { |
2338 | return 1; | |
2339 | } | |
2340 | ||
c381a3f6 JB |
2341 | /* -Wmissing-prototypes */ |
2342 | extern initialize_file_ftype _initialize_darwin_inferior; | |
2343 | ||
a80b95ba | 2344 | void |
bb00b29d | 2345 | _initialize_darwin_inferior (void) |
a80b95ba TG |
2346 | { |
2347 | kern_return_t kret; | |
2348 | ||
a80b95ba TG |
2349 | gdb_task = mach_task_self (); |
2350 | darwin_host_self = mach_host_self (); | |
2351 | ||
2352 | /* Read page size. */ | |
2353 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2354 | if (kret != KERN_SUCCESS) | |
2355 | { | |
2356 | mach_page_size = 0x1000; | |
2357 | MACH_CHECK_ERROR (kret); | |
2358 | } | |
2359 | ||
a80b95ba TG |
2360 | darwin_ops = inf_child_target (); |
2361 | ||
a80b95ba TG |
2362 | darwin_ops->to_create_inferior = darwin_create_inferior; |
2363 | darwin_ops->to_attach = darwin_attach; | |
2364 | darwin_ops->to_attach_no_wait = 0; | |
2365 | darwin_ops->to_detach = darwin_detach; | |
2366 | darwin_ops->to_files_info = darwin_files_info; | |
bb00b29d | 2367 | darwin_ops->to_wait = darwin_wait_to; |
a80b95ba TG |
2368 | darwin_ops->to_mourn_inferior = darwin_mourn_inferior; |
2369 | darwin_ops->to_kill = darwin_kill_inferior; | |
bfedc46a | 2370 | darwin_ops->to_interrupt = darwin_interrupt; |
bb00b29d | 2371 | darwin_ops->to_resume = darwin_resume_to; |
a80b95ba TG |
2372 | darwin_ops->to_thread_alive = darwin_thread_alive; |
2373 | darwin_ops->to_pid_to_str = darwin_pid_to_str; | |
bb00b29d | 2374 | darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file; |
a80b95ba | 2375 | darwin_ops->to_load = NULL; |
a80b95ba | 2376 | darwin_ops->to_xfer_partial = darwin_xfer_partial; |
bb00b29d TG |
2377 | darwin_ops->to_supports_multi_process = darwin_supports_multi_process; |
2378 | darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid; | |
a80b95ba TG |
2379 | |
2380 | darwin_complete_target (darwin_ops); | |
2381 | ||
2382 | add_target (darwin_ops); | |
2383 | ||
3eb831e0 TG |
2384 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), |
2385 | (unsigned long) mach_task_self (), getpid ()); | |
a80b95ba | 2386 | |
ccce17b0 YQ |
2387 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2388 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2389 | Set if printing inferior communication debugging statements."), _("\ |
2390 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2391 | NULL, NULL, |
2392 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2393 | |
2394 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2395 | &enable_mach_exceptions, _("\ | |
2396 | Set if mach exceptions are caught."), _("\ | |
2397 | Show if mach exceptions are caught."), _("\ | |
2398 | When this mode is on, all low level exceptions are reported before being\n\ | |
2399 | reported by the kernel."), | |
2400 | &set_enable_mach_exceptions, NULL, | |
2401 | &setlist, &showlist); | |
2402 | } |