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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
e2882c85 | 2 | Copyright (C) 2008-2018 Free Software Foundation, Inc. |
a80b95ba TG |
3 | |
4 | Contributed by AdaCore. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
47d48711 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
a80b95ba TG |
20 | |
21 | #include "defs.h" | |
22 | #include "top.h" | |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "symfile.h" | |
26 | #include "symtab.h" | |
27 | #include "objfiles.h" | |
a80b95ba TG |
28 | #include "gdbcmd.h" |
29 | #include "gdbcore.h" | |
30 | #include "gdbthread.h" | |
31 | #include "regcache.h" | |
32 | #include "event-top.h" | |
33 | #include "inf-loop.h" | |
53ce3c39 | 34 | #include <sys/stat.h> |
a80b95ba TG |
35 | #include "inf-child.h" |
36 | #include "value.h" | |
37 | #include "arch-utils.h" | |
38 | #include "bfd.h" | |
ece0061f | 39 | #include "bfd/mach-o.h" |
a80b95ba TG |
40 | |
41 | #include <sys/ptrace.h> | |
42 | #include <sys/signal.h> | |
4ac15b59 | 43 | #include <setjmp.h> |
a80b95ba TG |
44 | #include <sys/types.h> |
45 | #include <unistd.h> | |
46 | #include <signal.h> | |
a80b95ba | 47 | #include <ctype.h> |
a80b95ba TG |
48 | #include <sys/sysctl.h> |
49 | #include <sys/proc.h> | |
bb00b29d TG |
50 | #include <libproc.h> |
51 | #include <sys/syscall.h> | |
e69860f1 | 52 | #include <spawn.h> |
a80b95ba TG |
53 | |
54 | #include <mach/mach_error.h> | |
55 | #include <mach/mach_vm.h> | |
56 | #include <mach/mach_init.h> | |
57 | #include <mach/vm_map.h> | |
58 | #include <mach/task.h> | |
59 | #include <mach/mach_port.h> | |
60 | #include <mach/thread_act.h> | |
61 | #include <mach/port.h> | |
62 | ||
63 | #include "darwin-nat.h" | |
21ff4686 | 64 | #include "common/filestuff.h" |
01ec7a27 | 65 | #include "nat/fork-inferior.h" |
a80b95ba TG |
66 | |
67 | /* Quick overview. | |
68 | Darwin kernel is Mach + BSD derived kernel. Note that they share the | |
69 | same memory space and are linked together (ie there is no micro-kernel). | |
70 | ||
71 | Although ptrace(2) is available on Darwin, it is not complete. We have | |
72 | to use Mach calls to read and write memory and to modify registers. We | |
73 | also use Mach to get inferior faults. As we cannot use select(2) or | |
74 | signals with Mach port (the Mach communication channel), signals are | |
75 | reported to gdb as an exception. Furthermore we detect death of the | |
76 | inferior through a Mach notification message. This way we only wait | |
77 | on Mach ports. | |
78 | ||
79 | Some Mach documentation is available for Apple xnu source package or | |
80 | from the web. */ | |
81 | ||
82 | ||
83 | #define PTRACE(CMD, PID, ADDR, SIG) \ | |
84 | darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG)) | |
85 | ||
f6cfb427 | 86 | static void darwin_interrupt (struct target_ops *self); |
a80b95ba | 87 | |
bb00b29d | 88 | static void darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, |
2ea28649 | 89 | enum gdb_signal signal); |
bb00b29d | 90 | static void darwin_resume (ptid_t ptid, int step, |
2ea28649 | 91 | enum gdb_signal signal); |
bb00b29d TG |
92 | |
93 | static ptid_t darwin_wait_to (struct target_ops *ops, ptid_t ptid, | |
94 | struct target_waitstatus *status, int options); | |
95 | static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status); | |
96 | ||
a80b95ba TG |
97 | static void darwin_mourn_inferior (struct target_ops *ops); |
98 | ||
2ab1c2d9 | 99 | static void darwin_kill_inferior (struct target_ops *ops); |
a80b95ba TG |
100 | |
101 | static void darwin_ptrace_me (void); | |
102 | ||
103 | static void darwin_ptrace_him (int pid); | |
104 | ||
7c5ded6a SDJ |
105 | static void darwin_create_inferior (struct target_ops *ops, |
106 | const char *exec_file, | |
107 | const std::string &allargs, | |
108 | char **env, int from_tty); | |
a80b95ba TG |
109 | |
110 | static void darwin_files_info (struct target_ops *ops); | |
111 | ||
7a114964 | 112 | static const char *darwin_pid_to_str (struct target_ops *ops, ptid_t tpid); |
bb00b29d TG |
113 | |
114 | static int darwin_thread_alive (struct target_ops *ops, ptid_t tpid); | |
a80b95ba | 115 | |
a41f2563 TG |
116 | static void darwin_encode_reply (mig_reply_error_t *reply, |
117 | mach_msg_header_t *hdr, integer_t code); | |
118 | ||
82b19a4d TG |
119 | static void darwin_setup_request_notification (struct inferior *inf); |
120 | static void darwin_deallocate_exception_ports (darwin_inferior *inf); | |
121 | static void darwin_setup_exceptions (struct inferior *inf); | |
122 | static void darwin_deallocate_threads (struct inferior *inf); | |
123 | ||
a80b95ba TG |
124 | /* Target operations for Darwin. */ |
125 | static struct target_ops *darwin_ops; | |
126 | ||
127 | /* Task identifier of gdb. */ | |
128 | static task_t gdb_task; | |
129 | ||
130 | /* A copy of mach_host_self (). */ | |
131 | mach_port_t darwin_host_self; | |
132 | ||
133 | /* Exception port. */ | |
134 | mach_port_t darwin_ex_port; | |
135 | ||
a6290449 | 136 | /* Port set, to wait for answer on all ports. */ |
a80b95ba TG |
137 | mach_port_t darwin_port_set; |
138 | ||
0963b4bd | 139 | /* Page size. */ |
a80b95ba TG |
140 | static vm_size_t mach_page_size; |
141 | ||
142 | /* If Set, catch all mach exceptions (before they are converted to signals | |
143 | by the kernel). */ | |
144 | static int enable_mach_exceptions; | |
145 | ||
bb00b29d TG |
146 | /* Inferior that should report a fake stop event. */ |
147 | static struct inferior *darwin_inf_fake_stop; | |
148 | ||
a80b95ba TG |
149 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
150 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
151 | ||
bb00b29d | 152 | /* This controls output of inferior debugging. */ |
ccce17b0 | 153 | static unsigned int darwin_debug_flag = 0; |
a80b95ba | 154 | |
15c19d39 TG |
155 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
156 | be signed. This is required to get an authorization for task_for_pid. | |
157 | ||
a6290449 TG |
158 | Once gdb is built, you must codesign it with any system-trusted signing |
159 | authority. See taskgated(8) for details. */ | |
15c19d39 TG |
160 | static const unsigned char info_plist[] |
161 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
162 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
163 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
164 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
165 | "<plist version=\"1.0\">\n" | |
166 | "<dict>\n" | |
167 | " <key>CFBundleIdentifier</key>\n" | |
168 | " <string>org.gnu.gdb</string>\n" | |
169 | " <key>CFBundleName</key>\n" | |
170 | " <string>gdb</string>\n" | |
171 | " <key>CFBundleVersion</key>\n" | |
172 | " <string>1.0</string>\n" | |
173 | " <key>SecTaskAccess</key>\n" | |
174 | " <array>\n" | |
175 | " <string>allowed</string>\n" | |
176 | " <string>debug</string>\n" | |
177 | " </array>\n" | |
178 | "</dict>\n" | |
179 | "</plist>\n"; | |
180 | ||
77b64a49 PA |
181 | static void inferior_debug (int level, const char *fmt, ...) |
182 | ATTRIBUTE_PRINTF (2, 3); | |
183 | ||
a80b95ba TG |
184 | static void |
185 | inferior_debug (int level, const char *fmt, ...) | |
186 | { | |
187 | va_list ap; | |
188 | ||
189 | if (darwin_debug_flag < level) | |
190 | return; | |
191 | ||
192 | va_start (ap, fmt); | |
193 | printf_unfiltered (_("[%d inferior]: "), getpid ()); | |
194 | vprintf_unfiltered (fmt, ap); | |
195 | va_end (ap); | |
196 | } | |
197 | ||
198 | void | |
199 | mach_check_error (kern_return_t ret, const char *file, | |
200 | unsigned int line, const char *func) | |
201 | { | |
202 | if (ret == KERN_SUCCESS) | |
203 | return; | |
204 | if (func == NULL) | |
205 | func = _("[UNKNOWN]"); | |
bb00b29d | 206 | |
4f1cdeec | 207 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 208 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
209 | } |
210 | ||
211 | static const char * | |
212 | unparse_exception_type (unsigned int i) | |
213 | { | |
214 | static char unknown_exception_buf[32]; | |
215 | ||
216 | switch (i) | |
217 | { | |
218 | case EXC_BAD_ACCESS: | |
219 | return "EXC_BAD_ACCESS"; | |
220 | case EXC_BAD_INSTRUCTION: | |
221 | return "EXC_BAD_INSTRUCTION"; | |
222 | case EXC_ARITHMETIC: | |
223 | return "EXC_ARITHMETIC"; | |
224 | case EXC_EMULATION: | |
225 | return "EXC_EMULATION"; | |
226 | case EXC_SOFTWARE: | |
227 | return "EXC_SOFTWARE"; | |
228 | case EXC_BREAKPOINT: | |
229 | return "EXC_BREAKPOINT"; | |
230 | case EXC_SYSCALL: | |
231 | return "EXC_SYSCALL"; | |
232 | case EXC_MACH_SYSCALL: | |
233 | return "EXC_MACH_SYSCALL"; | |
234 | case EXC_RPC_ALERT: | |
235 | return "EXC_RPC_ALERT"; | |
236 | case EXC_CRASH: | |
237 | return "EXC_CRASH"; | |
238 | default: | |
239 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
240 | return unknown_exception_buf; | |
241 | } | |
242 | } | |
243 | ||
a7aa0d73 JB |
244 | /* Set errno to zero, and then call ptrace with the given arguments. |
245 | If inferior debugging traces are on, then also print a debug | |
246 | trace. | |
247 | ||
248 | The returned value is the same as the value returned by ptrace, | |
249 | except in the case where that value is -1 but errno is zero. | |
250 | This case is documented to be a non-error situation, so we | |
251 | return zero in that case. */ | |
252 | ||
a80b95ba TG |
253 | static int |
254 | darwin_ptrace (const char *name, | |
aa14fb50 | 255 | int request, int pid, caddr_t arg3, int arg4) |
a80b95ba TG |
256 | { |
257 | int ret; | |
258 | ||
a7aa0d73 | 259 | errno = 0; |
aa14fb50 | 260 | ret = ptrace (request, pid, arg3, arg4); |
a7aa0d73 JB |
261 | if (ret == -1 && errno == 0) |
262 | ret = 0; | |
a80b95ba | 263 | |
3eb831e0 TG |
264 | inferior_debug (4, _("ptrace (%s, %d, 0x%lx, %d): %d (%s)\n"), |
265 | name, pid, (unsigned long) arg3, arg4, ret, | |
a3224241 | 266 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
267 | return ret; |
268 | } | |
269 | ||
270 | static int | |
271 | cmp_thread_t (const void *l, const void *r) | |
272 | { | |
bb00b29d TG |
273 | thread_t tl = *(const thread_t *)l; |
274 | thread_t tr = *(const thread_t *)r; | |
275 | return (int)(tl - tr); | |
a80b95ba TG |
276 | } |
277 | ||
278 | static void | |
bb00b29d | 279 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
280 | { |
281 | kern_return_t kret; | |
a80b95ba TG |
282 | thread_array_t thread_list; |
283 | unsigned int new_nbr; | |
284 | unsigned int old_nbr; | |
285 | unsigned int new_ix, old_ix; | |
089354bb SM |
286 | darwin_inferior *darwin_inf = get_darwin_inferior (inf); |
287 | std::vector<darwin_thread_t *> new_thread_vec; | |
a80b95ba TG |
288 | |
289 | /* Get list of threads. */ | |
bb00b29d | 290 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
291 | MACH_CHECK_ERROR (kret); |
292 | if (kret != KERN_SUCCESS) | |
293 | return; | |
294 | ||
bb00b29d | 295 | /* Sort the list. */ |
a80b95ba TG |
296 | if (new_nbr > 1) |
297 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
298 | ||
089354bb | 299 | old_nbr = darwin_inf->threads.size (); |
a80b95ba | 300 | |
bb00b29d TG |
301 | /* Quick check for no changes. */ |
302 | if (old_nbr == new_nbr) | |
303 | { | |
089354bb SM |
304 | size_t i; |
305 | ||
bb00b29d | 306 | for (i = 0; i < new_nbr; i++) |
089354bb | 307 | if (thread_list[i] != darwin_inf->threads[i]->gdb_port) |
bb00b29d TG |
308 | break; |
309 | if (i == new_nbr) | |
310 | { | |
15a9128a TG |
311 | /* Deallocate ports. */ |
312 | for (i = 0; i < new_nbr; i++) | |
313 | { | |
314 | kret = mach_port_deallocate (mach_task_self (), thread_list[i]); | |
315 | MACH_CHECK_ERROR (kret); | |
316 | } | |
317 | ||
318 | /* Deallocate the buffer. */ | |
bb00b29d TG |
319 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
320 | new_nbr * sizeof (int)); | |
321 | MACH_CHECK_ERROR (kret); | |
15a9128a | 322 | |
bb00b29d TG |
323 | return; |
324 | } | |
325 | } | |
326 | ||
82b19a4d | 327 | /* Full handling: detect new threads, remove dead threads. */ |
089354bb SM |
328 | |
329 | new_thread_vec.reserve (new_nbr); | |
bb00b29d | 330 | |
a80b95ba TG |
331 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
332 | { | |
089354bb SM |
333 | thread_t new_id = (new_ix < new_nbr) ? thread_list[new_ix] : THREAD_NULL; |
334 | darwin_thread_t *old | |
335 | = (old_ix < old_nbr) ? darwin_inf->threads[old_ix] : NULL; | |
336 | thread_t old_id = old != NULL ? old->gdb_port : THREAD_NULL; | |
bb00b29d TG |
337 | |
338 | inferior_debug | |
c8c9911f | 339 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"), |
bb00b29d | 340 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
a80b95ba TG |
341 | |
342 | if (old_id == new_id) | |
343 | { | |
344 | /* Thread still exist. */ | |
089354bb | 345 | new_thread_vec.push_back (old); |
a80b95ba TG |
346 | new_ix++; |
347 | old_ix++; | |
348 | ||
15a9128a TG |
349 | /* Deallocate the port. */ |
350 | kret = mach_port_deallocate (gdb_task, new_id); | |
a80b95ba | 351 | MACH_CHECK_ERROR (kret); |
15a9128a | 352 | |
a80b95ba TG |
353 | continue; |
354 | } | |
bb00b29d TG |
355 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
356 | { | |
357 | /* Ignore dead ports. | |
358 | In some weird cases, we might get dead ports. They should | |
359 | correspond to dead thread so they could safely be ignored. */ | |
360 | new_ix++; | |
361 | continue; | |
362 | } | |
363 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
364 | { |
365 | /* A thread was created. */ | |
7aabaf9d | 366 | darwin_thread_info *pti = new darwin_thread_info; |
a80b95ba | 367 | |
bb00b29d TG |
368 | pti->gdb_port = new_id; |
369 | pti->msg_state = DARWIN_RUNNING; | |
370 | ||
db665f42 SM |
371 | /* Add the new thread. */ |
372 | add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti); | |
089354bb | 373 | new_thread_vec.push_back (pti); |
a80b95ba TG |
374 | new_ix++; |
375 | continue; | |
376 | } | |
bb00b29d | 377 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
378 | { |
379 | /* A thread was removed. */ | |
380 | delete_thread (ptid_build (inf->pid, 0, old_id)); | |
381 | kret = mach_port_deallocate (gdb_task, old_id); | |
382 | MACH_CHECK_ERROR (kret); | |
383 | old_ix++; | |
bb00b29d | 384 | continue; |
a80b95ba | 385 | } |
f3574227 | 386 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
387 | } |
388 | ||
089354bb | 389 | darwin_inf->threads = std::move (new_thread_vec); |
a80b95ba | 390 | |
15a9128a | 391 | /* Deallocate the buffer. */ |
a80b95ba TG |
392 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
393 | new_nbr * sizeof (int)); | |
394 | MACH_CHECK_ERROR (kret); | |
395 | } | |
396 | ||
bb00b29d TG |
397 | static int |
398 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 399 | { |
089354bb SM |
400 | darwin_inferior *priv = get_darwin_inferior (inf); |
401 | ||
402 | return priv->task == *(task_t *)port_ptr; | |
bb00b29d | 403 | } |
a80b95ba | 404 | |
bb00b29d | 405 | static int |
82b19a4d | 406 | find_inferior_pid_it (struct inferior *inf, void *pid_ptr) |
bb00b29d | 407 | { |
82b19a4d | 408 | return inf->pid == *(int *)pid_ptr; |
a80b95ba TG |
409 | } |
410 | ||
bb00b29d TG |
411 | /* Return an inferior by task port. */ |
412 | static struct inferior * | |
413 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 414 | { |
bb00b29d TG |
415 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
416 | } | |
a80b95ba | 417 | |
82b19a4d | 418 | /* Return an inferior by pid port. */ |
bb00b29d | 419 | static struct inferior * |
82b19a4d | 420 | darwin_find_inferior_by_pid (int pid) |
bb00b29d | 421 | { |
82b19a4d | 422 | return iterate_over_inferiors (&find_inferior_pid_it, &pid); |
bb00b29d | 423 | } |
a80b95ba | 424 | |
bb00b29d TG |
425 | /* Return a thread by port. */ |
426 | static darwin_thread_t * | |
427 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
428 | { | |
089354bb SM |
429 | darwin_inferior *priv = get_darwin_inferior (inf); |
430 | ||
431 | for (darwin_thread_t *t : priv->threads) | |
432 | { | |
433 | if (t->gdb_port == thread) | |
434 | return t; | |
435 | } | |
bb00b29d | 436 | |
bb00b29d TG |
437 | return NULL; |
438 | } | |
a80b95ba | 439 | |
bb00b29d | 440 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 441 | |
bb00b29d TG |
442 | static void |
443 | darwin_suspend_inferior (struct inferior *inf) | |
444 | { | |
089354bb SM |
445 | darwin_inferior *priv = get_darwin_inferior (inf); |
446 | ||
447 | if (!priv->suspended) | |
a80b95ba | 448 | { |
bb00b29d | 449 | kern_return_t kret; |
a80b95ba | 450 | |
089354bb | 451 | kret = task_suspend (priv->task); |
bb00b29d | 452 | MACH_CHECK_ERROR (kret); |
a80b95ba | 453 | |
089354bb | 454 | priv->suspended = 1; |
bb00b29d TG |
455 | } |
456 | } | |
a80b95ba | 457 | |
bb00b29d | 458 | /* Resume an inferior at Mach level. */ |
a80b95ba | 459 | |
bb00b29d TG |
460 | static void |
461 | darwin_resume_inferior (struct inferior *inf) | |
462 | { | |
089354bb SM |
463 | darwin_inferior *priv = get_darwin_inferior (inf); |
464 | ||
465 | if (priv->suspended) | |
bb00b29d TG |
466 | { |
467 | kern_return_t kret; | |
a80b95ba | 468 | |
089354bb | 469 | kret = task_resume (priv->task); |
bb00b29d TG |
470 | MACH_CHECK_ERROR (kret); |
471 | ||
089354bb | 472 | priv->suspended = 0; |
a80b95ba TG |
473 | } |
474 | } | |
475 | ||
bb00b29d TG |
476 | /* Iterator functions. */ |
477 | ||
478 | static int | |
479 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 480 | { |
bb00b29d TG |
481 | darwin_suspend_inferior (inf); |
482 | darwin_check_new_threads (inf); | |
483 | return 0; | |
484 | } | |
485 | ||
486 | static int | |
487 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
488 | { | |
489 | darwin_resume_inferior (inf); | |
490 | return 0; | |
a80b95ba TG |
491 | } |
492 | ||
bb00b29d TG |
493 | static void |
494 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
495 | { | |
496 | printf_unfiltered (_("message header:\n")); | |
497 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
498 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
499 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
500 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
501 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
502 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
503 | ||
504 | if (disp_body) | |
505 | { | |
506 | const unsigned char *data; | |
a6290449 | 507 | const unsigned int *ldata; |
bb00b29d TG |
508 | int size; |
509 | int i; | |
510 | ||
511 | data = (unsigned char *)(hdr + 1); | |
512 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
513 | ||
514 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
515 | { | |
516 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
517 | mach_msg_port_descriptor_t *desc = | |
518 | (mach_msg_port_descriptor_t *)(bod + 1); | |
519 | int k; | |
520 | NDR_record_t *ndr; | |
521 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
522 | bod->msgh_descriptor_count); | |
523 | data += sizeof (mach_msg_body_t); | |
524 | size -= sizeof (mach_msg_body_t); | |
525 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
526 | switch (desc[k].type) | |
527 | { | |
528 | case MACH_MSG_PORT_DESCRIPTOR: | |
529 | printf_unfiltered | |
530 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
531 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
532 | break; | |
533 | default: | |
534 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
535 | k, desc[k].type); | |
536 | break; | |
537 | } | |
538 | data += bod->msgh_descriptor_count | |
539 | * sizeof (mach_msg_port_descriptor_t); | |
540 | size -= bod->msgh_descriptor_count | |
541 | * sizeof (mach_msg_port_descriptor_t); | |
542 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
543 | printf_unfiltered | |
544 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
545 | "int=%02x char=%02x float=%02x\n"), | |
546 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
547 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
548 | data += sizeof (NDR_record_t); | |
549 | size -= sizeof (NDR_record_t); | |
550 | } | |
551 | ||
552 | printf_unfiltered (_(" data:")); | |
a6290449 TG |
553 | ldata = (const unsigned int *)data; |
554 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
555 | printf_unfiltered (" %08x", ldata[i]); | |
bb00b29d TG |
556 | printf_unfiltered (_("\n")); |
557 | } | |
558 | } | |
559 | ||
82b19a4d TG |
560 | /* Adjust inferior data when a new task was created. */ |
561 | ||
562 | static struct inferior * | |
563 | darwin_find_new_inferior (task_t task_port, thread_t thread_port) | |
564 | { | |
565 | int task_pid; | |
566 | struct inferior *inf; | |
567 | kern_return_t kret; | |
568 | mach_port_t prev; | |
569 | ||
570 | /* Find the corresponding pid. */ | |
571 | kret = pid_for_task (task_port, &task_pid); | |
572 | if (kret != KERN_SUCCESS) | |
573 | { | |
574 | MACH_CHECK_ERROR (kret); | |
575 | return NULL; | |
576 | } | |
577 | ||
578 | /* Find the inferior for this pid. */ | |
579 | inf = darwin_find_inferior_by_pid (task_pid); | |
580 | if (inf == NULL) | |
581 | return NULL; | |
582 | ||
089354bb SM |
583 | darwin_inferior *priv = get_darwin_inferior (inf); |
584 | ||
82b19a4d | 585 | /* Deallocate saved exception ports. */ |
089354bb | 586 | darwin_deallocate_exception_ports (priv); |
82b19a4d TG |
587 | |
588 | /* No need to remove dead_name notification, but still... */ | |
089354bb | 589 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d TG |
590 | MACH_NOTIFY_DEAD_NAME, 0, |
591 | MACH_PORT_NULL, | |
592 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
593 | &prev); | |
594 | if (kret != KERN_INVALID_ARGUMENT) | |
595 | MACH_CHECK_ERROR (kret); | |
596 | ||
597 | /* Replace old task port. */ | |
089354bb | 598 | kret = mach_port_deallocate (gdb_task, priv->task); |
82b19a4d | 599 | MACH_CHECK_ERROR (kret); |
089354bb | 600 | priv->task = task_port; |
82b19a4d TG |
601 | |
602 | darwin_setup_request_notification (inf); | |
603 | darwin_setup_exceptions (inf); | |
604 | ||
605 | return inf; | |
606 | } | |
607 | ||
608 | /* Check data representation. */ | |
609 | ||
610 | static int | |
611 | darwin_check_message_ndr (NDR_record_t *ndr) | |
612 | { | |
613 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
614 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
615 | || ndr->mig_encoding != NDR_record.mig_encoding | |
616 | || ndr->int_rep != NDR_record.int_rep | |
617 | || ndr->char_rep != NDR_record.char_rep | |
618 | || ndr->float_rep != NDR_record.float_rep) | |
619 | return -1; | |
620 | return 0; | |
621 | } | |
622 | ||
623 | /* Decode an exception message. */ | |
624 | ||
bb00b29d TG |
625 | static int |
626 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
627 | struct inferior **pinf, | |
628 | darwin_thread_t **pthread) | |
a80b95ba | 629 | { |
bb00b29d TG |
630 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
631 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
632 | NDR_record_t *ndr; | |
633 | integer_t *data; | |
634 | struct inferior *inf; | |
635 | darwin_thread_t *thread; | |
636 | task_t task_port; | |
637 | thread_t thread_port; | |
a80b95ba | 638 | kern_return_t kret; |
bb00b29d | 639 | int i; |
a80b95ba | 640 | |
a41f2563 TG |
641 | /* Check message destination. */ |
642 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
643 | return -1; |
644 | ||
645 | /* Check message header. */ | |
646 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
647 | return -1; | |
648 | ||
649 | /* Check descriptors. */ | |
650 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
651 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
652 | || bod->msgh_descriptor_count != 2 | |
653 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
654 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
655 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
656 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
657 | return -1; | |
658 | ||
659 | /* Check data representation. */ | |
660 | ndr = (NDR_record_t *)(desc + 2); | |
82b19a4d | 661 | if (darwin_check_message_ndr (ndr) != 0) |
bb00b29d TG |
662 | return -1; |
663 | ||
664 | /* Ok, the hard work. */ | |
665 | data = (integer_t *)(ndr + 1); | |
666 | ||
bb00b29d TG |
667 | task_port = desc[1].name; |
668 | thread_port = desc[0].name; | |
a41f2563 | 669 | |
a41f2563 | 670 | /* Find process by port. */ |
bb00b29d | 671 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 672 | *pinf = inf; |
82b19a4d TG |
673 | |
674 | if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2 | |
675 | && data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP) | |
676 | { | |
677 | /* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0, | |
678 | as a new Mach task is created when a process exec. */ | |
679 | inf = darwin_find_new_inferior (task_port, thread_port); | |
680 | *pinf = inf; | |
681 | ||
682 | if (inf == NULL) | |
683 | { | |
684 | /* Deallocate task_port, unless it was saved. */ | |
685 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
686 | MACH_CHECK_ERROR (kret); | |
687 | } | |
688 | } | |
689 | else | |
690 | { | |
691 | /* We got new rights to the task, get rid of it. Do not get rid of | |
692 | thread right, as we will need it to find the thread. */ | |
693 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
694 | MACH_CHECK_ERROR (kret); | |
695 | } | |
696 | ||
a41f2563 TG |
697 | if (inf == NULL) |
698 | { | |
699 | /* Not a known inferior. This could happen if the child fork, as | |
700 | the created process will inherit its exception port. | |
701 | FIXME: should the exception port be restored ? */ | |
702 | kern_return_t kret; | |
703 | mig_reply_error_t reply; | |
704 | ||
82b19a4d TG |
705 | inferior_debug |
706 | (4, _("darwin_decode_exception_message: unknown task 0x%x\n"), | |
707 | task_port); | |
708 | ||
15a9128a TG |
709 | /* Free thread port (we don't know it). */ |
710 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
711 | MACH_CHECK_ERROR (kret); | |
712 | ||
a41f2563 TG |
713 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); |
714 | ||
715 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
716 | reply.Head.msgh_size, 0, | |
717 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
718 | MACH_PORT_NULL); | |
719 | MACH_CHECK_ERROR (kret); | |
720 | ||
721 | return 0; | |
722 | } | |
bb00b29d TG |
723 | |
724 | /* Find thread by port. */ | |
725 | /* Check for new threads. Do it early so that the port in the exception | |
726 | message can be deallocated. */ | |
727 | darwin_check_new_threads (inf); | |
728 | ||
15a9128a TG |
729 | /* Free the thread port (as gdb knows the thread, it has already has a right |
730 | for it, so this just decrement a reference counter). */ | |
731 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
732 | MACH_CHECK_ERROR (kret); | |
733 | ||
bb00b29d TG |
734 | thread = darwin_find_thread (inf, thread_port); |
735 | if (thread == NULL) | |
736 | return -1; | |
737 | *pthread = thread; | |
738 | ||
a6290449 TG |
739 | /* The thread should be running. However we have observed cases where a |
740 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
741 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
742 | ||
bb00b29d | 743 | /* Finish decoding. */ |
bb00b29d TG |
744 | thread->event.header = *hdr; |
745 | thread->event.thread_port = thread_port; | |
746 | thread->event.task_port = task_port; | |
747 | thread->event.ex_type = data[0]; | |
748 | thread->event.data_count = data[1]; | |
749 | ||
750 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
751 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
752 | + data[1] * sizeof (integer_t))) | |
753 | return -1; | |
754 | for (i = 0; i < data[1]; i++) | |
755 | thread->event.ex_data[i] = data[2 + i]; | |
756 | ||
757 | thread->msg_state = DARWIN_MESSAGE; | |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
82b19a4d TG |
762 | /* Decode dead_name notify message. */ |
763 | ||
764 | static int | |
765 | darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf) | |
766 | { | |
767 | NDR_record_t *ndr = (NDR_record_t *)(hdr + 1); | |
768 | integer_t *data = (integer_t *)(ndr + 1); | |
769 | struct inferior *inf; | |
770 | darwin_thread_t *thread; | |
771 | task_t task_port; | |
772 | thread_t thread_port; | |
773 | kern_return_t kret; | |
774 | int i; | |
775 | ||
776 | /* Check message header. */ | |
777 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
778 | return -1; | |
779 | ||
780 | /* Check descriptors. */ | |
781 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t))) | |
782 | return -2; | |
783 | ||
784 | /* Check data representation. */ | |
785 | if (darwin_check_message_ndr (ndr) != 0) | |
786 | return -3; | |
787 | ||
788 | task_port = data[0]; | |
789 | ||
790 | /* Find process by port. */ | |
791 | inf = darwin_find_inferior_by_task (task_port); | |
792 | *pinf = inf; | |
793 | ||
089354bb SM |
794 | darwin_inferior *priv = get_darwin_inferior (inf); |
795 | ||
82b19a4d | 796 | /* Check message destination. */ |
089354bb | 797 | if (inf != NULL && hdr->msgh_local_port != priv->notify_port) |
82b19a4d TG |
798 | return -4; |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
bb00b29d TG |
803 | static void |
804 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
805 | integer_t code) | |
806 | { | |
807 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
808 | |
809 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 810 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 811 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
812 | rh->msgh_local_port = MACH_PORT_NULL; |
813 | rh->msgh_id = hdr->msgh_id + 100; | |
814 | ||
815 | reply->NDR = NDR_record; | |
816 | reply->RetCode = code; | |
a80b95ba TG |
817 | } |
818 | ||
bb00b29d TG |
819 | static void |
820 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
821 | { |
822 | kern_return_t kret; | |
bb00b29d | 823 | mig_reply_error_t reply; |
089354bb | 824 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 825 | |
bb00b29d TG |
826 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
827 | ||
828 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
829 | reply.Head.msgh_size, 0, | |
830 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
831 | MACH_PORT_NULL); | |
a80b95ba TG |
832 | MACH_CHECK_ERROR (kret); |
833 | ||
089354bb | 834 | priv->pending_messages--; |
bb00b29d TG |
835 | } |
836 | ||
837 | static void | |
838 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
839 | int step, int nsignal) | |
840 | { | |
841 | kern_return_t kret; | |
842 | int res; | |
843 | ||
a80b95ba | 844 | inferior_debug |
bb00b29d TG |
845 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
846 | thread->msg_state, thread->gdb_port, step, nsignal); | |
847 | ||
848 | switch (thread->msg_state) | |
a80b95ba | 849 | { |
bb00b29d TG |
850 | case DARWIN_MESSAGE: |
851 | if (thread->event.ex_type == EXC_SOFTWARE | |
852 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
853 | { | |
854 | /* Either deliver a new signal or cancel the signal received. */ | |
855 | res = PTRACE (PT_THUPDATE, inf->pid, | |
597e448c | 856 | (caddr_t) (uintptr_t) thread->gdb_port, nsignal); |
bb00b29d TG |
857 | if (res < 0) |
858 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
859 | } | |
860 | else if (nsignal) | |
861 | { | |
862 | /* Note: ptrace is allowed only if the process is stopped. | |
863 | Directly send the signal to the thread. */ | |
864 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
865 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), | |
866 | thread->gdb_port, nsignal, res); | |
867 | thread->signaled = 1; | |
868 | } | |
869 | ||
d987a266 | 870 | /* Set or reset single step. */ |
aa14fb50 TG |
871 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
872 | thread->gdb_port, step); | |
873 | darwin_set_sstep (thread->gdb_port, step); | |
874 | thread->single_step = step; | |
bb00b29d TG |
875 | |
876 | darwin_send_reply (inf, thread); | |
877 | thread->msg_state = DARWIN_RUNNING; | |
878 | break; | |
879 | ||
880 | case DARWIN_RUNNING: | |
881 | break; | |
882 | ||
883 | case DARWIN_STOPPED: | |
884 | kret = thread_resume (thread->gdb_port); | |
885 | MACH_CHECK_ERROR (kret); | |
886 | ||
887 | thread->msg_state = DARWIN_RUNNING; | |
888 | break; | |
a80b95ba | 889 | } |
bb00b29d | 890 | } |
a80b95ba | 891 | |
bb00b29d | 892 | /* Resume all threads of the inferior. */ |
a80b95ba | 893 | |
bb00b29d TG |
894 | static void |
895 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
896 | { | |
089354bb | 897 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 898 | |
089354bb | 899 | for (darwin_thread_t *thread : priv->threads) |
bb00b29d | 900 | darwin_resume_thread (inf, thread, step, nsignal); |
a80b95ba TG |
901 | } |
902 | ||
bb00b29d | 903 | struct resume_inferior_threads_param |
a80b95ba | 904 | { |
bb00b29d TG |
905 | int step; |
906 | int nsignal; | |
907 | }; | |
908 | ||
909 | static int | |
910 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
911 | { | |
912 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
913 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
914 | ||
915 | darwin_resume_inferior_threads (inf, step, nsignal); | |
916 | ||
917 | return 0; | |
918 | } | |
919 | ||
920 | /* Suspend all threads of INF. */ | |
921 | ||
922 | static void | |
923 | darwin_suspend_inferior_threads (struct inferior *inf) | |
924 | { | |
089354bb | 925 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 926 | |
089354bb SM |
927 | for (darwin_thread_t *thread : priv->threads) |
928 | { | |
929 | switch (thread->msg_state) | |
930 | { | |
931 | case DARWIN_STOPPED: | |
932 | case DARWIN_MESSAGE: | |
933 | break; | |
934 | case DARWIN_RUNNING: | |
935 | { | |
936 | kern_return_t kret = thread_suspend (thread->gdb_port); | |
937 | MACH_CHECK_ERROR (kret); | |
938 | thread->msg_state = DARWIN_STOPPED; | |
939 | break; | |
940 | } | |
941 | } | |
942 | } | |
bb00b29d | 943 | } |
a80b95ba | 944 | |
bb00b29d | 945 | static void |
2ea28649 | 946 | darwin_resume (ptid_t ptid, int step, enum gdb_signal signal) |
bb00b29d TG |
947 | { |
948 | struct target_waitstatus status; | |
949 | int pid; | |
a80b95ba | 950 | |
bb00b29d TG |
951 | kern_return_t kret; |
952 | int res; | |
953 | int nsignal; | |
954 | struct inferior *inf; | |
a80b95ba | 955 | |
bb00b29d | 956 | inferior_debug |
3eb831e0 | 957 | (2, _("darwin_resume: pid=%d, tid=0x%lx, step=%d, signal=%d\n"), |
bb00b29d TG |
958 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); |
959 | ||
a493e3e2 | 960 | if (signal == GDB_SIGNAL_0) |
bb00b29d TG |
961 | nsignal = 0; |
962 | else | |
2ea28649 | 963 | nsignal = gdb_signal_to_host (signal); |
a80b95ba | 964 | |
bb00b29d TG |
965 | /* Don't try to single step all threads. */ |
966 | if (step) | |
967 | ptid = inferior_ptid; | |
968 | ||
969 | /* minus_one_ptid is RESUME_ALL. */ | |
970 | if (ptid_equal (ptid, minus_one_ptid)) | |
a80b95ba | 971 | { |
bb00b29d TG |
972 | struct resume_inferior_threads_param param; |
973 | ||
974 | param.nsignal = nsignal; | |
975 | param.step = step; | |
a80b95ba | 976 | |
bb00b29d TG |
977 | /* Resume threads. */ |
978 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
979 | /* Resume tasks. */ | |
980 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
981 | } | |
982 | else | |
a80b95ba | 983 | { |
c9657e70 | 984 | struct inferior *inf = find_inferior_ptid (ptid); |
bb00b29d TG |
985 | long tid = ptid_get_tid (ptid); |
986 | ||
987 | /* Stop the inferior (should be useless). */ | |
988 | darwin_suspend_inferior (inf); | |
989 | ||
990 | if (tid == 0) | |
991 | darwin_resume_inferior_threads (inf, step, nsignal); | |
992 | else | |
993 | { | |
994 | darwin_thread_t *thread; | |
995 | ||
996 | /* Suspend threads of the task. */ | |
997 | darwin_suspend_inferior_threads (inf); | |
998 | ||
999 | /* Resume the selected thread. */ | |
1000 | thread = darwin_find_thread (inf, tid); | |
1001 | gdb_assert (thread); | |
1002 | darwin_resume_thread (inf, thread, step, nsignal); | |
1003 | } | |
1004 | ||
1005 | /* Resume the task. */ | |
1006 | darwin_resume_inferior (inf); | |
a80b95ba | 1007 | } |
bb00b29d | 1008 | } |
a80b95ba | 1009 | |
bb00b29d TG |
1010 | static void |
1011 | darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step, | |
2ea28649 | 1012 | enum gdb_signal signal) |
bb00b29d TG |
1013 | { |
1014 | return darwin_resume (ptid, step, signal); | |
1015 | } | |
1016 | ||
1017 | static ptid_t | |
1018 | darwin_decode_message (mach_msg_header_t *hdr, | |
1019 | darwin_thread_t **pthread, | |
1020 | struct inferior **pinf, | |
1021 | struct target_waitstatus *status) | |
1022 | { | |
1023 | darwin_thread_t *thread; | |
1024 | struct inferior *inf; | |
a80b95ba | 1025 | |
a41f2563 TG |
1026 | /* Exception message. 2401 == 0x961 is exc. */ |
1027 | if (hdr->msgh_id == 2401) | |
a80b95ba | 1028 | { |
bb00b29d TG |
1029 | int res; |
1030 | ||
1031 | /* Decode message. */ | |
1032 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
1033 | ||
1034 | if (res < 0) | |
a80b95ba | 1035 | { |
bb00b29d | 1036 | /* Should not happen... */ |
c8c9911f JB |
1037 | printf_unfiltered |
1038 | (_("darwin_wait: ill-formatted message (id=0x%x)\n"), hdr->msgh_id); | |
bb00b29d | 1039 | /* FIXME: send a failure reply? */ |
a41f2563 TG |
1040 | status->kind = TARGET_WAITKIND_IGNORE; |
1041 | return minus_one_ptid; | |
1042 | } | |
1043 | if (inf == NULL) | |
1044 | { | |
1045 | status->kind = TARGET_WAITKIND_IGNORE; | |
a80b95ba TG |
1046 | return minus_one_ptid; |
1047 | } | |
bb00b29d TG |
1048 | *pinf = inf; |
1049 | *pthread = thread; | |
089354bb SM |
1050 | |
1051 | darwin_inferior *priv = get_darwin_inferior (inf); | |
1052 | ||
1053 | priv->pending_messages++; | |
a80b95ba TG |
1054 | |
1055 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
1056 | thread->msg_state = DARWIN_MESSAGE; |
1057 | ||
c8c9911f | 1058 | inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"), |
bb00b29d TG |
1059 | thread->gdb_port, |
1060 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 1061 | |
bb00b29d | 1062 | switch (thread->event.ex_type) |
a80b95ba TG |
1063 | { |
1064 | case EXC_BAD_ACCESS: | |
4e225075 | 1065 | status->value.sig = GDB_EXC_BAD_ACCESS; |
a80b95ba TG |
1066 | break; |
1067 | case EXC_BAD_INSTRUCTION: | |
4e225075 | 1068 | status->value.sig = GDB_EXC_BAD_INSTRUCTION; |
a80b95ba TG |
1069 | break; |
1070 | case EXC_ARITHMETIC: | |
4e225075 | 1071 | status->value.sig = GDB_EXC_ARITHMETIC; |
a80b95ba TG |
1072 | break; |
1073 | case EXC_EMULATION: | |
4e225075 | 1074 | status->value.sig = GDB_EXC_EMULATION; |
a80b95ba TG |
1075 | break; |
1076 | case EXC_SOFTWARE: | |
bb00b29d | 1077 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 1078 | { |
bb00b29d | 1079 | status->value.sig = |
2ea28649 | 1080 | gdb_signal_from_host (thread->event.ex_data[1]); |
bb00b29d TG |
1081 | inferior_debug (5, _(" (signal %d: %s)\n"), |
1082 | thread->event.ex_data[1], | |
2ea28649 | 1083 | gdb_signal_to_name (status->value.sig)); |
bb00b29d TG |
1084 | |
1085 | /* If the thread is stopped because it has received a signal | |
1086 | that gdb has just sent, continue. */ | |
1087 | if (thread->signaled) | |
1088 | { | |
1089 | thread->signaled = 0; | |
1090 | darwin_send_reply (inf, thread); | |
1091 | thread->msg_state = DARWIN_RUNNING; | |
1092 | status->kind = TARGET_WAITKIND_IGNORE; | |
1093 | } | |
a80b95ba TG |
1094 | } |
1095 | else | |
4e225075 | 1096 | status->value.sig = GDB_EXC_SOFTWARE; |
a80b95ba TG |
1097 | break; |
1098 | case EXC_BREAKPOINT: | |
1099 | /* Many internal GDB routines expect breakpoints to be reported | |
4e225075 | 1100 | as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT |
0963b4bd | 1101 | as a spurious signal. */ |
a493e3e2 | 1102 | status->value.sig = GDB_SIGNAL_TRAP; |
a80b95ba TG |
1103 | break; |
1104 | default: | |
a493e3e2 | 1105 | status->value.sig = GDB_SIGNAL_UNKNOWN; |
a80b95ba TG |
1106 | break; |
1107 | } | |
1108 | ||
bb00b29d TG |
1109 | return ptid_build (inf->pid, 0, thread->gdb_port); |
1110 | } | |
a41f2563 | 1111 | else if (hdr->msgh_id == 0x48) |
bb00b29d | 1112 | { |
a41f2563 | 1113 | /* MACH_NOTIFY_DEAD_NAME: notification for exit. */ |
82b19a4d TG |
1114 | int res; |
1115 | ||
1116 | res = darwin_decode_notify_message (hdr, &inf); | |
1117 | ||
1118 | if (res < 0) | |
1119 | { | |
1120 | /* Should not happen... */ | |
1121 | printf_unfiltered | |
1122 | (_("darwin_wait: ill-formatted message (id=0x%x, res=%d)\n"), | |
1123 | hdr->msgh_id, res); | |
1124 | } | |
1125 | ||
a41f2563 TG |
1126 | *pinf = NULL; |
1127 | *pthread = NULL; | |
bb00b29d | 1128 | |
82b19a4d TG |
1129 | if (res < 0 || inf == NULL) |
1130 | { | |
1131 | status->kind = TARGET_WAITKIND_IGNORE; | |
1132 | return minus_one_ptid; | |
1133 | } | |
1134 | ||
a41f2563 TG |
1135 | if (inf != NULL) |
1136 | { | |
089354bb SM |
1137 | darwin_inferior *priv = get_darwin_inferior (inf); |
1138 | ||
1139 | if (!priv->no_ptrace) | |
bb00b29d | 1140 | { |
a41f2563 TG |
1141 | pid_t res; |
1142 | int wstatus; | |
1143 | ||
1144 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
1145 | if (res < 0 || res != inf->pid) | |
1146 | { | |
1147 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
1148 | res, safe_strerror (errno)); | |
1149 | status->kind = TARGET_WAITKIND_IGNORE; | |
1150 | return minus_one_ptid; | |
1151 | } | |
1152 | if (WIFEXITED (wstatus)) | |
1153 | { | |
1154 | status->kind = TARGET_WAITKIND_EXITED; | |
1155 | status->value.integer = WEXITSTATUS (wstatus); | |
1156 | } | |
1157 | else | |
1158 | { | |
1159 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
5ae00552 | 1160 | status->value.sig = gdb_signal_from_host (WTERMSIG (wstatus)); |
a41f2563 TG |
1161 | } |
1162 | ||
1163 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"), | |
1164 | res, wstatus); | |
1165 | ||
1166 | /* Looks necessary on Leopard and harmless... */ | |
1167 | wait4 (inf->pid, &wstatus, 0, NULL); | |
1168 | ||
82b19a4d TG |
1169 | inferior_ptid = ptid_build (inf->pid, 0, 0); |
1170 | return inferior_ptid; | |
bb00b29d TG |
1171 | } |
1172 | else | |
1173 | { | |
a41f2563 TG |
1174 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
1175 | status->kind = TARGET_WAITKIND_EXITED; | |
1176 | status->value.integer = 0; /* Don't know. */ | |
1177 | return ptid_build (inf->pid, 0, 0); | |
bb00b29d | 1178 | } |
bb00b29d TG |
1179 | } |
1180 | } | |
1181 | ||
a41f2563 | 1182 | /* Unknown message. */ |
86ad98c3 | 1183 | warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id); |
a41f2563 | 1184 | status->kind = TARGET_WAITKIND_IGNORE; |
bb00b29d TG |
1185 | return minus_one_ptid; |
1186 | } | |
1187 | ||
1188 | static int | |
1189 | cancel_breakpoint (ptid_t ptid) | |
1190 | { | |
0963b4bd | 1191 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1192 | the current event, eventually we will resume this thread, and this |
1193 | breakpoint will trap again. | |
1194 | ||
1195 | If we do not do this, then we run the risk that the user will | |
1196 | delete or disable the breakpoint, but the thread will have already | |
1197 | tripped on it. */ | |
1198 | ||
1199 | struct regcache *regcache = get_thread_regcache (ptid); | |
ac7936df | 1200 | struct gdbarch *gdbarch = regcache->arch (); |
bb00b29d | 1201 | CORE_ADDR pc; |
a80b95ba | 1202 | |
527a273a | 1203 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
a01bda52 | 1204 | if (breakpoint_inserted_here_p (regcache->aspace (), pc)) |
bb00b29d | 1205 | { |
3eb831e0 TG |
1206 | inferior_debug (4, "cancel_breakpoint for thread 0x%lx\n", |
1207 | (unsigned long) ptid_get_tid (ptid)); | |
bb00b29d TG |
1208 | |
1209 | /* Back up the PC if necessary. */ | |
527a273a | 1210 | if (gdbarch_decr_pc_after_break (gdbarch)) |
bb00b29d TG |
1211 | regcache_write_pc (regcache, pc); |
1212 | ||
1213 | return 1; | |
a80b95ba | 1214 | } |
bb00b29d TG |
1215 | return 0; |
1216 | } | |
1217 | ||
1218 | static ptid_t | |
1219 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1220 | { | |
1221 | kern_return_t kret; | |
1222 | union | |
1223 | { | |
1224 | mach_msg_header_t hdr; | |
1225 | char data[0x100]; | |
1226 | } msgin; | |
1227 | mach_msg_header_t *hdr = &msgin.hdr; | |
1228 | ptid_t res; | |
1229 | darwin_thread_t *thread; | |
1230 | struct inferior *inf; | |
1231 | ||
1232 | inferior_debug | |
1233 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
1234 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
1235 | ||
1236 | /* Handle fake stop events at first. */ | |
1237 | if (darwin_inf_fake_stop != NULL) | |
1238 | { | |
1239 | inf = darwin_inf_fake_stop; | |
1240 | darwin_inf_fake_stop = NULL; | |
1241 | ||
089354bb SM |
1242 | darwin_inferior *priv = get_darwin_inferior (inf); |
1243 | ||
bb00b29d | 1244 | status->kind = TARGET_WAITKIND_STOPPED; |
a493e3e2 | 1245 | status->value.sig = GDB_SIGNAL_TRAP; |
089354bb | 1246 | thread = priv->threads[0]; |
bb00b29d TG |
1247 | thread->msg_state = DARWIN_STOPPED; |
1248 | return ptid_build (inf->pid, 0, thread->gdb_port); | |
1249 | } | |
1250 | ||
1251 | do | |
1252 | { | |
1253 | /* set_sigint_trap (); */ | |
1254 | ||
1255 | /* Wait for a message. */ | |
1256 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1257 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1258 | ||
1259 | /* clear_sigint_trap (); */ | |
1260 | ||
1261 | if (kret == MACH_RCV_INTERRUPTED) | |
1262 | { | |
1263 | status->kind = TARGET_WAITKIND_IGNORE; | |
1264 | return minus_one_ptid; | |
1265 | } | |
1266 | ||
1267 | if (kret != MACH_MSG_SUCCESS) | |
1268 | { | |
c8c9911f | 1269 | inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret); |
bb00b29d TG |
1270 | status->kind = TARGET_WAITKIND_SPURIOUS; |
1271 | return minus_one_ptid; | |
1272 | } | |
1273 | ||
1274 | /* Debug: display message. */ | |
1275 | if (darwin_debug_flag > 10) | |
1276 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1277 | ||
1278 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
a41f2563 TG |
1279 | if (ptid_equal (res, minus_one_ptid)) |
1280 | continue; | |
bb00b29d | 1281 | |
a41f2563 | 1282 | /* Early return in case an inferior has exited. */ |
bb00b29d TG |
1283 | if (inf == NULL) |
1284 | return res; | |
1285 | } | |
1286 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1287 | ||
1288 | /* Stop all tasks. */ | |
1289 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1290 | ||
1291 | /* Read pending messages. */ | |
1292 | while (1) | |
a80b95ba | 1293 | { |
bb00b29d TG |
1294 | struct target_waitstatus status2; |
1295 | ptid_t ptid2; | |
1296 | ||
1297 | kret = mach_msg (&msgin.hdr, | |
1298 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1299 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1300 | ||
1301 | if (kret == MACH_RCV_TIMED_OUT) | |
1302 | break; | |
1303 | if (kret != MACH_MSG_SUCCESS) | |
1304 | { | |
1305 | inferior_debug | |
c8c9911f | 1306 | (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret); |
bb00b29d TG |
1307 | break; |
1308 | } | |
1309 | ||
a41f2563 TG |
1310 | /* Debug: display message. */ |
1311 | if (darwin_debug_flag > 10) | |
1312 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1313 | ||
bb00b29d | 1314 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); |
a80b95ba | 1315 | |
bb00b29d TG |
1316 | if (inf != NULL && thread != NULL |
1317 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1318 | { |
bb00b29d TG |
1319 | if (thread->single_step |
1320 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) | |
1321 | { | |
1322 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1323 | darwin_send_reply (inf, thread); | |
1324 | thread->msg_state = DARWIN_RUNNING; | |
1325 | } | |
1326 | else | |
1327 | inferior_debug | |
c8c9911f | 1328 | (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"), |
bb00b29d | 1329 | thread->gdb_port); |
a80b95ba | 1330 | } |
bb00b29d TG |
1331 | else |
1332 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1333 | } | |
1334 | return res; | |
1335 | } | |
a80b95ba | 1336 | |
bb00b29d | 1337 | static ptid_t |
a6290449 | 1338 | darwin_wait_to (struct target_ops *ops, |
bb00b29d TG |
1339 | ptid_t ptid, struct target_waitstatus *status, int options) |
1340 | { | |
1341 | return darwin_wait (ptid, status); | |
1342 | } | |
a80b95ba | 1343 | |
bb00b29d | 1344 | static void |
f6cfb427 | 1345 | darwin_interrupt (struct target_ops *self) |
bb00b29d TG |
1346 | { |
1347 | struct inferior *inf = current_inferior (); | |
089354bb | 1348 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1349 | |
bb00b29d | 1350 | /* FIXME: handle in no_ptrace mode. */ |
089354bb | 1351 | gdb_assert (!priv->no_ptrace); |
bb00b29d | 1352 | kill (inf->pid, SIGINT); |
a80b95ba TG |
1353 | } |
1354 | ||
82b19a4d TG |
1355 | /* Deallocate threads port and vector. */ |
1356 | ||
a80b95ba | 1357 | static void |
82b19a4d | 1358 | darwin_deallocate_threads (struct inferior *inf) |
a80b95ba | 1359 | { |
089354bb SM |
1360 | darwin_inferior *priv = get_darwin_inferior (inf); |
1361 | ||
1362 | for (darwin_thread_t *t : priv->threads) | |
a80b95ba | 1363 | { |
089354bb SM |
1364 | kern_return_t kret = mach_port_deallocate (gdb_task, t->gdb_port); |
1365 | MACH_CHECK_ERROR (kret); | |
a80b95ba | 1366 | } |
089354bb SM |
1367 | |
1368 | priv->threads.clear (); | |
82b19a4d | 1369 | } |
a80b95ba | 1370 | |
82b19a4d TG |
1371 | static void |
1372 | darwin_mourn_inferior (struct target_ops *ops) | |
1373 | { | |
1374 | struct inferior *inf = current_inferior (); | |
089354bb | 1375 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1376 | kern_return_t kret; |
1377 | mach_port_t prev; | |
1378 | int i; | |
1379 | ||
1380 | /* Deallocate threads. */ | |
1381 | darwin_deallocate_threads (inf); | |
1382 | ||
1383 | /* Remove notify_port from darwin_port_set. */ | |
bb00b29d | 1384 | kret = mach_port_move_member (gdb_task, |
089354bb | 1385 | priv->notify_port, MACH_PORT_NULL); |
fda184b6 | 1386 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1387 | |
82b19a4d | 1388 | /* Remove task port dead_name notification. */ |
089354bb | 1389 | kret = mach_port_request_notification (gdb_task, priv->task, |
a80b95ba | 1390 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1391 | MACH_PORT_NULL, |
a80b95ba TG |
1392 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1393 | &prev); | |
1394 | /* This can fail if the task is dead. */ | |
c8c9911f | 1395 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
089354bb | 1396 | priv->task, prev, priv->notify_port); |
bb00b29d | 1397 | |
a80b95ba TG |
1398 | if (kret == KERN_SUCCESS) |
1399 | { | |
1400 | kret = mach_port_deallocate (gdb_task, prev); | |
1401 | MACH_CHECK_ERROR (kret); | |
1402 | } | |
1403 | ||
82b19a4d | 1404 | /* Destroy notify_port. */ |
089354bb | 1405 | kret = mach_port_destroy (gdb_task, priv->notify_port); |
bb00b29d TG |
1406 | MACH_CHECK_ERROR (kret); |
1407 | ||
a80b95ba | 1408 | /* Deallocate saved exception ports. */ |
089354bb | 1409 | darwin_deallocate_exception_ports (priv); |
a80b95ba | 1410 | |
82b19a4d | 1411 | /* Deallocate task port. */ |
089354bb | 1412 | kret = mach_port_deallocate (gdb_task, priv->task); |
a80b95ba TG |
1413 | MACH_CHECK_ERROR (kret); |
1414 | ||
fe978cb0 | 1415 | inf->priv = NULL; |
a80b95ba | 1416 | |
c1ee2fb3 | 1417 | inf_child_mourn_inferior (ops); |
a80b95ba TG |
1418 | } |
1419 | ||
1420 | static void | |
bb00b29d | 1421 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1422 | { |
089354bb | 1423 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1424 | |
089354bb | 1425 | for (darwin_thread_t *t : priv->threads) |
bb00b29d TG |
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; | |
089354bb | 1440 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1441 | |
bb00b29d | 1442 | gdb_assert (inf != NULL); |
a80b95ba | 1443 | |
bb00b29d | 1444 | darwin_suspend_inferior (inf); |
a80b95ba | 1445 | |
bb00b29d | 1446 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1447 | |
089354bb | 1448 | if (priv->no_ptrace) |
bb00b29d | 1449 | return; |
a80b95ba | 1450 | |
bb00b29d TG |
1451 | res = kill (inf->pid, SIGSTOP); |
1452 | if (res != 0) | |
b37520b6 | 1453 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1454 | |
bb00b29d TG |
1455 | /* Wait until the process is really stopped. */ |
1456 | while (1) | |
a80b95ba | 1457 | { |
bb00b29d TG |
1458 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1459 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 1460 | && wstatus.value.sig == GDB_SIGNAL_STOP) |
bb00b29d | 1461 | break; |
a80b95ba TG |
1462 | } |
1463 | } | |
1464 | ||
1465 | static kern_return_t | |
1466 | darwin_save_exception_ports (darwin_inferior *inf) | |
1467 | { | |
1468 | kern_return_t kret; | |
1469 | ||
1470 | inf->exception_info.count = | |
1471 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1472 | ||
1473 | kret = task_get_exception_ports | |
1474 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1475 | &inf->exception_info.count, inf->exception_info.ports, | |
1476 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1477 | return kret; | |
1478 | } | |
1479 | ||
1480 | static kern_return_t | |
1481 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1482 | { | |
1483 | int i; | |
1484 | kern_return_t kret; | |
1485 | ||
1486 | for (i = 0; i < inf->exception_info.count; i++) | |
1487 | { | |
1488 | kret = task_set_exception_ports | |
1489 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1490 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1491 | if (kret != KERN_SUCCESS) | |
1492 | return kret; | |
1493 | } | |
1494 | ||
1495 | return KERN_SUCCESS; | |
1496 | } | |
1497 | ||
82b19a4d TG |
1498 | /* Deallocate saved exception ports. */ |
1499 | ||
1500 | static void | |
1501 | darwin_deallocate_exception_ports (darwin_inferior *inf) | |
1502 | { | |
1503 | int i; | |
1504 | kern_return_t kret; | |
1505 | ||
1506 | for (i = 0; i < inf->exception_info.count; i++) | |
1507 | { | |
1508 | kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]); | |
1509 | MACH_CHECK_ERROR (kret); | |
1510 | } | |
1511 | inf->exception_info.count = 0; | |
1512 | } | |
1513 | ||
1514 | static void | |
1515 | darwin_setup_exceptions (struct inferior *inf) | |
1516 | { | |
089354bb | 1517 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1518 | kern_return_t kret; |
1519 | int traps_expected; | |
1520 | exception_mask_t mask; | |
1521 | ||
089354bb | 1522 | kret = darwin_save_exception_ports (priv); |
82b19a4d TG |
1523 | if (kret != KERN_SUCCESS) |
1524 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1525 | "returned: %d"), | |
1526 | kret); | |
1527 | ||
1528 | /* Set exception port. */ | |
1529 | if (enable_mach_exceptions) | |
1530 | mask = EXC_MASK_ALL; | |
1531 | else | |
1532 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
089354bb | 1533 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
82b19a4d TG |
1534 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
1535 | if (kret != KERN_SUCCESS) | |
1536 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1537 | "returned: %d"), | |
1538 | kret); | |
1539 | } | |
1540 | ||
a80b95ba | 1541 | static void |
bb00b29d TG |
1542 | darwin_kill_inferior (struct target_ops *ops) |
1543 | { | |
1544 | struct inferior *inf = current_inferior (); | |
089354bb | 1545 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
1546 | struct target_waitstatus wstatus; |
1547 | ptid_t ptid; | |
1548 | kern_return_t kret; | |
1549 | int status; | |
1550 | int res; | |
1551 | ||
1552 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1553 | return; | |
1554 | ||
1555 | gdb_assert (inf != NULL); | |
1556 | ||
089354bb | 1557 | kret = darwin_restore_exception_ports (priv); |
ee41036f | 1558 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1559 | |
ee41036f | 1560 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1561 | |
ee41036f | 1562 | res = kill (inf->pid, 9); |
bb00b29d | 1563 | |
ee41036f | 1564 | if (res == 0) |
bb00b29d | 1565 | { |
bb00b29d | 1566 | darwin_resume_inferior (inf); |
a6290449 | 1567 | |
bb00b29d TG |
1568 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1569 | } | |
ee41036f TG |
1570 | else if (errno != ESRCH) |
1571 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1572 | inf->pid, safe_strerror (errno)); | |
bb00b29d | 1573 | |
bc1e6c81 | 1574 | target_mourn_inferior (inferior_ptid); |
bb00b29d TG |
1575 | } |
1576 | ||
82b19a4d TG |
1577 | static void |
1578 | darwin_setup_request_notification (struct inferior *inf) | |
1579 | { | |
089354bb | 1580 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1581 | kern_return_t kret; |
1582 | mach_port_t prev_not; | |
1583 | ||
089354bb | 1584 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d | 1585 | MACH_NOTIFY_DEAD_NAME, 0, |
089354bb | 1586 | priv->notify_port, |
82b19a4d TG |
1587 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1588 | &prev_not); | |
1589 | if (kret != KERN_SUCCESS) | |
1590 | error (_("Termination notification request failed, " | |
1591 | "mach_port_request_notification\n" | |
1592 | "returned: %d"), | |
1593 | kret); | |
1594 | if (prev_not != MACH_PORT_NULL) | |
1595 | { | |
1596 | /* This is unexpected, as there should not be any previously | |
1597 | registered notification request. But this is not a fatal | |
1598 | issue, so just emit a warning. */ | |
1599 | warning (_("\ | |
1600 | A task termination request was registered before the debugger registered\n\ | |
1601 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1602 | impact on the debugging session.")); | |
1603 | } | |
1604 | } | |
1605 | ||
bb00b29d TG |
1606 | static void |
1607 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1608 | { |
a80b95ba TG |
1609 | kern_return_t kret; |
1610 | mach_port_t prev_port; | |
1611 | int traps_expected; | |
bb00b29d | 1612 | mach_port_t prev_not; |
a80b95ba TG |
1613 | exception_mask_t mask; |
1614 | ||
089354bb SM |
1615 | darwin_inferior *priv = new darwin_inferior; |
1616 | inf->priv.reset (priv); | |
bb00b29d | 1617 | |
089354bb | 1618 | kret = task_for_pid (gdb_task, inf->pid, &priv->task); |
a80b95ba TG |
1619 | if (kret != KERN_SUCCESS) |
1620 | { | |
1621 | int status; | |
a80b95ba TG |
1622 | |
1623 | if (!inf->attach_flag) | |
1624 | { | |
bb00b29d TG |
1625 | kill (inf->pid, 9); |
1626 | waitpid (inf->pid, &status, 0); | |
a80b95ba TG |
1627 | } |
1628 | ||
1629 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
15c19d39 | 1630 | " (please check gdb is codesigned - see taskgated(8))"), |
bb00b29d | 1631 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
a80b95ba TG |
1632 | } |
1633 | ||
bb00b29d | 1634 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
089354bb | 1635 | priv->task, inf->pid); |
a80b95ba TG |
1636 | |
1637 | if (darwin_ex_port == MACH_PORT_NULL) | |
1638 | { | |
1639 | /* Create a port to get exceptions. */ | |
1640 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1641 | &darwin_ex_port); | |
fda184b6 JB |
1642 | if (kret != KERN_SUCCESS) |
1643 | error (_("Unable to create exception port, mach_port_allocate " | |
1644 | "returned: %d"), | |
1645 | kret); | |
a80b95ba TG |
1646 | |
1647 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, | |
1648 | MACH_MSG_TYPE_MAKE_SEND); | |
fda184b6 JB |
1649 | if (kret != KERN_SUCCESS) |
1650 | error (_("Unable to create exception port, mach_port_insert_right " | |
1651 | "returned: %d"), | |
1652 | kret); | |
a80b95ba TG |
1653 | |
1654 | /* Create a port set and put ex_port in it. */ | |
1655 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1656 | &darwin_port_set); | |
fda184b6 JB |
1657 | if (kret != KERN_SUCCESS) |
1658 | error (_("Unable to create port set, mach_port_allocate " | |
1659 | "returned: %d"), | |
1660 | kret); | |
a80b95ba TG |
1661 | |
1662 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); | |
fda184b6 JB |
1663 | if (kret != KERN_SUCCESS) |
1664 | error (_("Unable to move exception port into new port set, " | |
1665 | "mach_port_move_member\n" | |
1666 | "returned: %d"), | |
1667 | kret); | |
bb00b29d | 1668 | } |
a80b95ba | 1669 | |
bb00b29d TG |
1670 | /* Create a port to be notified when the child task terminates. */ |
1671 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
089354bb | 1672 | &priv->notify_port); |
fda184b6 JB |
1673 | if (kret != KERN_SUCCESS) |
1674 | error (_("Unable to create notification port, mach_port_allocate " | |
1675 | "returned: %d"), | |
1676 | kret); | |
a80b95ba | 1677 | |
bb00b29d | 1678 | kret = mach_port_move_member (gdb_task, |
089354bb | 1679 | priv->notify_port, darwin_port_set); |
fda184b6 JB |
1680 | if (kret != KERN_SUCCESS) |
1681 | error (_("Unable to move notification port into new port set, " | |
1682 | "mach_port_move_member\n" | |
1683 | "returned: %d"), | |
1684 | kret); | |
a80b95ba | 1685 | |
82b19a4d | 1686 | darwin_setup_request_notification (inf); |
a80b95ba | 1687 | |
82b19a4d | 1688 | darwin_setup_exceptions (inf); |
a80b95ba | 1689 | |
6a3cb8e8 PA |
1690 | if (!target_is_pushed (darwin_ops)) |
1691 | push_target (darwin_ops); | |
a80b95ba TG |
1692 | } |
1693 | ||
7aabaf9d | 1694 | /* Get the thread_info object corresponding to this darwin_thread_info. */ |
db665f42 SM |
1695 | |
1696 | static struct thread_info * | |
7aabaf9d | 1697 | thread_info_from_private_thread_info (darwin_thread_info *pti) |
db665f42 SM |
1698 | { |
1699 | struct thread_info *it; | |
1700 | ||
1701 | ALL_THREADS (it) | |
1702 | { | |
7aabaf9d SM |
1703 | darwin_thread_info *iter_pti = get_darwin_thread_info (it); |
1704 | ||
1705 | if (iter_pti->gdb_port == pti->gdb_port) | |
db665f42 SM |
1706 | break; |
1707 | } | |
1708 | ||
1709 | gdb_assert (it != NULL); | |
1710 | ||
1711 | return it; | |
1712 | } | |
1713 | ||
a80b95ba | 1714 | static void |
bb00b29d | 1715 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1716 | { |
a80b95ba TG |
1717 | darwin_check_new_threads (inf); |
1718 | ||
089354bb | 1719 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 1720 | |
089354bb SM |
1721 | gdb_assert (!priv->threads.empty ()); |
1722 | ||
7aabaf9d | 1723 | darwin_thread_info *first_pti = priv->threads.front (); |
db665f42 SM |
1724 | struct thread_info *first_thread |
1725 | = thread_info_from_private_thread_info (first_pti); | |
1726 | ||
1727 | inferior_ptid = first_thread->ptid; | |
bb00b29d TG |
1728 | } |
1729 | ||
1730 | /* The child must synchronize with gdb: gdb must set the exception port | |
1731 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1732 | FIXME: is there a lighter way ? */ | |
1733 | static int ptrace_fds[2]; | |
1734 | ||
1735 | static void | |
1736 | darwin_ptrace_me (void) | |
1737 | { | |
1738 | int res; | |
1739 | char c; | |
1740 | ||
1741 | /* Close write end point. */ | |
0db8980c SDJ |
1742 | if (close (ptrace_fds[1]) < 0) |
1743 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1744 | |
1745 | /* Wait until gdb is ready. */ | |
1746 | res = read (ptrace_fds[0], &c, 1); | |
fda184b6 | 1747 | if (res != 0) |
0db8980c SDJ |
1748 | trace_start_error (_("unable to read from pipe, read returned: %d"), res); |
1749 | ||
1750 | if (close (ptrace_fds[0]) < 0) | |
1751 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1752 | |
1753 | /* Get rid of privileges. */ | |
0db8980c SDJ |
1754 | if (setegid (getgid ()) < 0) |
1755 | trace_start_error_with_name ("setegid"); | |
bb00b29d TG |
1756 | |
1757 | /* Set TRACEME. */ | |
0db8980c SDJ |
1758 | if (PTRACE (PT_TRACE_ME, 0, 0, 0) < 0) |
1759 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1760 | |
1761 | /* Redirect signals to exception port. */ | |
0db8980c SDJ |
1762 | if (PTRACE (PT_SIGEXC, 0, 0, 0) < 0) |
1763 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1764 | } |
1765 | ||
1766 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1767 | static void | |
1768 | darwin_pre_ptrace (void) | |
1769 | { | |
1770 | if (pipe (ptrace_fds) != 0) | |
1771 | { | |
1772 | ptrace_fds[0] = -1; | |
1773 | ptrace_fds[1] = -1; | |
1774 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1775 | } | |
21ff4686 TT |
1776 | |
1777 | mark_fd_no_cloexec (ptrace_fds[0]); | |
1778 | mark_fd_no_cloexec (ptrace_fds[1]); | |
a80b95ba TG |
1779 | } |
1780 | ||
1781 | static void | |
1782 | darwin_ptrace_him (int pid) | |
1783 | { | |
1784 | task_t itask; | |
1785 | kern_return_t kret; | |
1786 | mach_port_t prev_port; | |
1787 | int traps_expected; | |
bb00b29d | 1788 | struct inferior *inf = current_inferior (); |
a80b95ba | 1789 | |
bb00b29d | 1790 | darwin_attach_pid (inf); |
a80b95ba TG |
1791 | |
1792 | /* Let's the child run. */ | |
1793 | close (ptrace_fds[0]); | |
1794 | close (ptrace_fds[1]); | |
1795 | ||
21ff4686 TT |
1796 | unmark_fd_no_cloexec (ptrace_fds[0]); |
1797 | unmark_fd_no_cloexec (ptrace_fds[1]); | |
1798 | ||
bb00b29d TG |
1799 | darwin_init_thread_list (inf); |
1800 | ||
2090129c | 1801 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
a80b95ba TG |
1802 | } |
1803 | ||
e69860f1 TG |
1804 | static void |
1805 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1806 | { | |
1807 | posix_spawnattr_t attr; | |
1808 | short ps_flags = 0; | |
f00c55f8 | 1809 | int res; |
e69860f1 | 1810 | |
f00c55f8 TG |
1811 | res = posix_spawnattr_init (&attr); |
1812 | if (res != 0) | |
e69860f1 TG |
1813 | { |
1814 | fprintf_unfiltered | |
1815 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); | |
1816 | return; | |
1817 | } | |
1818 | ||
1819 | /* Do like execve: replace the image. */ | |
1820 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1821 | ||
1822 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1823 | kernel include files. */ | |
1824 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1825 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1826 | #endif | |
1827 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1828 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1829 | if (res != 0) | |
e69860f1 | 1830 | { |
f00c55f8 | 1831 | fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1832 | return; |
1833 | } | |
1834 | ||
1835 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1836 | } | |
1837 | ||
a80b95ba | 1838 | static void |
7c5ded6a SDJ |
1839 | darwin_create_inferior (struct target_ops *ops, |
1840 | const char *exec_file, | |
1841 | const std::string &allargs, | |
1842 | char **env, int from_tty) | |
a80b95ba TG |
1843 | { |
1844 | /* Do the hard work. */ | |
db665f42 SM |
1845 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, |
1846 | darwin_ptrace_him, darwin_pre_ptrace, NULL, | |
1847 | darwin_execvp); | |
a80b95ba TG |
1848 | } |
1849 | \f | |
1850 | ||
726ce67c JB |
1851 | /* Set things up such that the next call to darwin_wait will immediately |
1852 | return a fake stop event for inferior INF. | |
1853 | ||
1854 | This assumes that the inferior's thread list has been initialized, | |
1855 | as it will suspend the inferior's first thread. */ | |
1856 | ||
1857 | static void | |
1858 | darwin_setup_fake_stop_event (struct inferior *inf) | |
1859 | { | |
089354bb | 1860 | darwin_inferior *priv = get_darwin_inferior (inf); |
726ce67c JB |
1861 | darwin_thread_t *thread; |
1862 | kern_return_t kret; | |
1863 | ||
1864 | gdb_assert (darwin_inf_fake_stop == NULL); | |
1865 | darwin_inf_fake_stop = inf; | |
1866 | ||
1867 | /* When detecting a fake pending stop event, darwin_wait returns | |
1868 | an event saying that the first thread is in a DARWIN_STOPPED | |
1869 | state. To make that accurate, we need to suspend that thread | |
1870 | as well. Otherwise, we'll try resuming it when resuming the | |
1871 | inferior, and get a warning because the thread's suspend count | |
1872 | is already zero, making the resume request useless. */ | |
089354bb | 1873 | thread = priv->threads[0]; |
726ce67c JB |
1874 | kret = thread_suspend (thread->gdb_port); |
1875 | MACH_CHECK_ERROR (kret); | |
1876 | } | |
1877 | ||
a80b95ba TG |
1878 | /* Attach to process PID, then initialize for debugging it |
1879 | and wait for the trace-trap that results from attaching. */ | |
1880 | static void | |
c0939df1 | 1881 | darwin_attach (struct target_ops *ops, const char *args, int from_tty) |
a80b95ba TG |
1882 | { |
1883 | pid_t pid; | |
1884 | pid_t pid2; | |
1885 | int wstatus; | |
1886 | int res; | |
1887 | struct inferior *inf; | |
bb00b29d | 1888 | kern_return_t kret; |
a80b95ba | 1889 | |
74164c56 | 1890 | pid = parse_pid_to_attach (args); |
a80b95ba | 1891 | |
74164c56 | 1892 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1893 | error (_("I refuse to debug myself!")); |
1894 | ||
1895 | if (from_tty) | |
bb00b29d TG |
1896 | { |
1897 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1898 | |
bb00b29d TG |
1899 | if (exec_file) |
1900 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
1901 | target_pid_to_str (pid_to_ptid (pid))); | |
1902 | else | |
1903 | printf_unfiltered (_("Attaching to %s\n"), | |
1904 | target_pid_to_str (pid_to_ptid (pid))); | |
1905 | ||
1906 | gdb_flush (gdb_stdout); | |
1907 | } | |
1908 | ||
1909 | if (pid == 0 || kill (pid, 0) < 0) | |
1910 | error (_("Can't attach to process %d: %s (%d)"), | |
1911 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1912 | |
bb00b29d | 1913 | inferior_ptid = pid_to_ptid (pid); |
6c95b8df PA |
1914 | inf = current_inferior (); |
1915 | inferior_appeared (inf, pid); | |
a80b95ba | 1916 | inf->attach_flag = 1; |
6c95b8df | 1917 | |
bb00b29d | 1918 | darwin_attach_pid (inf); |
a80b95ba | 1919 | |
bb00b29d | 1920 | darwin_suspend_inferior (inf); |
a80b95ba | 1921 | |
bb00b29d | 1922 | darwin_init_thread_list (inf); |
a80b95ba | 1923 | |
089354bb SM |
1924 | darwin_inferior *priv = get_darwin_inferior (inf); |
1925 | ||
1926 | darwin_check_osabi (priv, ptid_get_tid (inferior_ptid)); | |
a80b95ba | 1927 | |
726ce67c JB |
1928 | darwin_setup_fake_stop_event (inf); |
1929 | ||
089354bb | 1930 | priv->no_ptrace = 1; |
a80b95ba TG |
1931 | } |
1932 | ||
1933 | /* Take a program previously attached to and detaches it. | |
1934 | The program resumes execution and will no longer stop | |
1935 | on signals, etc. We'd better not have left any breakpoints | |
1936 | in the program or it'll die when it hits one. For this | |
1937 | to work, it may be necessary for the process to have been | |
1938 | previously attached. It *might* work if the program was | |
1939 | started via fork. */ | |
1940 | static void | |
6e1e1966 | 1941 | darwin_detach (struct target_ops *ops, inferior *inf, int from_tty) |
a80b95ba | 1942 | { |
bb00b29d | 1943 | pid_t pid = ptid_get_pid (inferior_ptid); |
089354bb | 1944 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
1945 | kern_return_t kret; |
1946 | int res; | |
1947 | ||
bb00b29d | 1948 | /* Display message. */ |
0f48b757 | 1949 | target_announce_detach (from_tty); |
a80b95ba | 1950 | |
bb00b29d | 1951 | /* If ptrace() is in use, stop the process. */ |
089354bb | 1952 | if (!priv->no_ptrace) |
bb00b29d | 1953 | darwin_stop_inferior (inf); |
a80b95ba | 1954 | |
089354bb | 1955 | kret = darwin_restore_exception_ports (priv); |
a80b95ba TG |
1956 | MACH_CHECK_ERROR (kret); |
1957 | ||
089354bb | 1958 | if (!priv->no_ptrace) |
a80b95ba | 1959 | { |
bb00b29d TG |
1960 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1961 | if (res != 0) | |
1962 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1963 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1964 | } |
1965 | ||
bb00b29d | 1966 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1967 | |
5e9bc145 JB |
1968 | /* When using ptrace, we have just performed a PT_DETACH, which |
1969 | resumes the inferior. On the other hand, when we are not using | |
1970 | ptrace, we need to resume its execution ourselves. */ | |
089354bb | 1971 | if (priv->no_ptrace) |
5e9bc145 | 1972 | darwin_resume_inferior (inf); |
a80b95ba TG |
1973 | |
1974 | darwin_mourn_inferior (ops); | |
1975 | } | |
1976 | ||
1977 | static void | |
1978 | darwin_files_info (struct target_ops *ops) | |
1979 | { | |
a80b95ba TG |
1980 | } |
1981 | ||
7a114964 | 1982 | static const char * |
117de6a9 | 1983 | darwin_pid_to_str (struct target_ops *ops, ptid_t ptid) |
a80b95ba | 1984 | { |
bb00b29d TG |
1985 | static char buf[80]; |
1986 | long tid = ptid_get_tid (ptid); | |
1987 | ||
1988 | if (tid != 0) | |
1989 | { | |
1990 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
1991 | tid, ptid_get_pid (ptid)); | |
1992 | return buf; | |
1993 | } | |
a80b95ba | 1994 | |
bb00b29d | 1995 | return normal_pid_to_str (ptid); |
a80b95ba TG |
1996 | } |
1997 | ||
1998 | static int | |
28439f5e | 1999 | darwin_thread_alive (struct target_ops *ops, ptid_t ptid) |
a80b95ba TG |
2000 | { |
2001 | return 1; | |
2002 | } | |
2003 | ||
2004 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
2005 | copy it to RDADDR in gdb's address space. | |
2006 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
2007 | to ADDR in inferior task's address space. | |
f00c55f8 | 2008 | Return 0 on failure; number of bytes read / writen otherwise. */ |
3eb831e0 | 2009 | |
a80b95ba TG |
2010 | static int |
2011 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 2012 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 2013 | ULONGEST length) |
a80b95ba | 2014 | { |
bb00b29d | 2015 | kern_return_t kret; |
3eb831e0 | 2016 | mach_vm_size_t res_length = 0; |
a80b95ba | 2017 | pointer_t copied; |
b9dd1947 | 2018 | mach_msg_type_number_t copy_count; |
a80b95ba TG |
2019 | mach_vm_size_t remaining_length; |
2020 | mach_vm_address_t region_address; | |
2021 | mach_vm_size_t region_length; | |
2022 | ||
b55e14c7 YQ |
2023 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
2024 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 2025 | |
3eb831e0 TG |
2026 | /* First read. */ |
2027 | if (rdaddr != NULL) | |
a80b95ba | 2028 | { |
3eb831e0 | 2029 | mach_vm_size_t count; |
a80b95ba | 2030 | |
3eb831e0 TG |
2031 | /* According to target.h(to_xfer_partial), one and only one may be |
2032 | non-null. */ | |
2033 | gdb_assert (wraddr == NULL); | |
a80b95ba | 2034 | |
3eb831e0 TG |
2035 | kret = mach_vm_read_overwrite (task, addr, length, |
2036 | (mach_vm_address_t) rdaddr, &count); | |
2037 | if (kret != KERN_SUCCESS) | |
2038 | { | |
2039 | inferior_debug | |
2040 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
2041 | core_addr_to_string (addr), mach_error_string (kret)); | |
2042 | return 0; | |
2043 | } | |
2044 | return count; | |
2045 | } | |
a80b95ba | 2046 | |
3eb831e0 TG |
2047 | /* See above. */ |
2048 | gdb_assert (wraddr != NULL); | |
a80b95ba | 2049 | |
3eb831e0 | 2050 | while (length != 0) |
a80b95ba | 2051 | { |
3eb831e0 TG |
2052 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
2053 | mach_vm_address_t region_address = (mach_vm_address_t) (addr - offset); | |
2054 | mach_vm_size_t aligned_length = | |
2055 | (mach_vm_size_t) PAGE_ROUND (offset + length); | |
bb00b29d | 2056 | vm_region_submap_short_info_data_64_t info; |
3eb831e0 TG |
2057 | mach_msg_type_number_t count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; |
2058 | natural_t region_depth = 1000; | |
bb00b29d | 2059 | mach_vm_address_t region_start = region_address; |
3eb831e0 TG |
2060 | mach_vm_size_t region_length; |
2061 | mach_vm_size_t write_length; | |
bb00b29d | 2062 | |
3eb831e0 | 2063 | /* Read page protection. */ |
bb00b29d TG |
2064 | kret = mach_vm_region_recurse |
2065 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
2066 | (vm_region_recurse_info_t) &info, &count); | |
2067 | ||
2068 | if (kret != KERN_SUCCESS) | |
a80b95ba | 2069 | { |
bb00b29d TG |
2070 | inferior_debug (1, _("darwin_read_write_inferior: " |
2071 | "mach_vm_region_recurse failed at %s: %s\n"), | |
2072 | core_addr_to_string (region_address), | |
2073 | mach_error_string (kret)); | |
3eb831e0 | 2074 | return res_length; |
a80b95ba TG |
2075 | } |
2076 | ||
bb00b29d TG |
2077 | inferior_debug |
2078 | (9, _("darwin_read_write_inferior: " | |
2079 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
2080 | core_addr_to_string (region_address), | |
2081 | core_addr_to_string (region_start), | |
2082 | core_addr_to_string (region_length)); | |
2083 | ||
0963b4bd | 2084 | /* Check for holes in memory. */ |
bb00b29d | 2085 | if (region_start > region_address) |
a80b95ba | 2086 | { |
0963b4bd | 2087 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 2088 | core_addr_to_string (region_address), |
bb00b29d | 2089 | core_addr_to_string (region_start), |
a80b95ba | 2090 | (unsigned)region_length); |
3eb831e0 | 2091 | return res_length; |
a80b95ba TG |
2092 | } |
2093 | ||
bb00b29d TG |
2094 | /* Adjust the length. */ |
2095 | region_length -= (region_address - region_start); | |
3eb831e0 TG |
2096 | if (region_length > aligned_length) |
2097 | region_length = aligned_length; | |
bb00b29d | 2098 | |
3eb831e0 TG |
2099 | /* Make the pages RW. */ |
2100 | if (!(info.protection & VM_PROT_WRITE)) | |
a80b95ba | 2101 | { |
3eb831e0 TG |
2102 | vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE; |
2103 | ||
2104 | kret = mach_vm_protect (task, region_address, region_length, | |
2105 | FALSE, prot); | |
bb00b29d TG |
2106 | if (kret != KERN_SUCCESS) |
2107 | { | |
3eb831e0 TG |
2108 | prot |= VM_PROT_COPY; |
2109 | kret = mach_vm_protect (task, region_address, region_length, | |
2110 | FALSE, prot); | |
2111 | } | |
2112 | if (kret != KERN_SUCCESS) | |
2113 | { | |
2114 | warning (_("darwin_read_write_inferior: " | |
2115 | "mach_vm_protect failed at %s " | |
2116 | "(len=0x%lx, prot=0x%x): %s"), | |
bb00b29d | 2117 | core_addr_to_string (region_address), |
3eb831e0 | 2118 | (unsigned long) region_length, (unsigned) prot, |
bb00b29d | 2119 | mach_error_string (kret)); |
3eb831e0 | 2120 | return res_length; |
bb00b29d | 2121 | } |
a80b95ba TG |
2122 | } |
2123 | ||
3eb831e0 TG |
2124 | if (offset + length > region_length) |
2125 | write_length = region_length - offset; | |
2126 | else | |
2127 | write_length = length; | |
2128 | ||
2129 | /* Write. */ | |
2130 | kret = mach_vm_write (task, addr, (vm_offset_t) wraddr, write_length); | |
2131 | if (kret != KERN_SUCCESS) | |
2132 | { | |
2133 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
2134 | mach_error_string (kret)); | |
2135 | return res_length; | |
2136 | } | |
2137 | ||
2138 | /* Restore page rights. */ | |
a80b95ba TG |
2139 | if (!(info.protection & VM_PROT_WRITE)) |
2140 | { | |
bb00b29d | 2141 | kret = mach_vm_protect (task, region_address, region_length, |
3eb831e0 | 2142 | FALSE, info.protection); |
bb00b29d | 2143 | if (kret != KERN_SUCCESS) |
a80b95ba | 2144 | { |
3eb831e0 TG |
2145 | warning (_("darwin_read_write_inferior: " |
2146 | "mach_vm_protect restore failed at %s " | |
2147 | "(len=0x%lx): %s"), | |
bb00b29d | 2148 | core_addr_to_string (region_address), |
3eb831e0 TG |
2149 | (unsigned long) region_length, |
2150 | mach_error_string (kret)); | |
a80b95ba TG |
2151 | } |
2152 | } | |
a80b95ba | 2153 | |
3eb831e0 TG |
2154 | addr += write_length; |
2155 | wraddr += write_length; | |
2156 | res_length += write_length; | |
2157 | length -= write_length; | |
a80b95ba | 2158 | } |
3eb831e0 TG |
2159 | |
2160 | return res_length; | |
a80b95ba TG |
2161 | } |
2162 | ||
f00c55f8 | 2163 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
ad2073b0 | 2164 | to RDADDR (in big endian). |
569283d4 | 2165 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 2166 | |
b967eb24 | 2167 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 2168 | /* This is not available in Darwin 9. */ |
9b409511 | 2169 | static enum target_xfer_status |
b9dd1947 | 2170 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 2171 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
2172 | { |
2173 | struct task_dyld_info task_dyld_info; | |
2174 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
2175 | int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t); | |
2176 | kern_return_t kret; | |
2177 | ||
ad2073b0 | 2178 | if (addr != 0 || length > sizeof (mach_vm_address_t)) |
9b409511 | 2179 | return TARGET_XFER_EOF; |
f00c55f8 | 2180 | |
ad2073b0 TG |
2181 | kret = task_info (task, TASK_DYLD_INFO, |
2182 | (task_info_t) &task_dyld_info, &count); | |
f00c55f8 TG |
2183 | MACH_CHECK_ERROR (kret); |
2184 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 2185 | return TARGET_XFER_E_IO; |
ad2073b0 TG |
2186 | |
2187 | store_unsigned_integer (rdaddr, length, BFD_ENDIAN_BIG, | |
2188 | task_dyld_info.all_image_info_addr); | |
9b409511 YQ |
2189 | *xfered_len = (ULONGEST) length; |
2190 | return TARGET_XFER_OK; | |
f00c55f8 | 2191 | } |
569283d4 | 2192 | #endif |
f00c55f8 | 2193 | |
a80b95ba | 2194 | \f |
a80b95ba | 2195 | |
1b281443 | 2196 | static enum target_xfer_status |
a80b95ba TG |
2197 | darwin_xfer_partial (struct target_ops *ops, |
2198 | enum target_object object, const char *annex, | |
2199 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 2200 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
a80b95ba | 2201 | { |
bb00b29d | 2202 | struct inferior *inf = current_inferior (); |
089354bb | 2203 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2204 | |
2205 | inferior_debug | |
b55e14c7 YQ |
2206 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
2207 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
2208 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
2209 | inf->pid); | |
a80b95ba | 2210 | |
f00c55f8 TG |
2211 | switch (object) |
2212 | { | |
2213 | case TARGET_OBJECT_MEMORY: | |
9b409511 | 2214 | { |
089354bb | 2215 | int l = darwin_read_write_inferior (priv->task, offset, |
9b409511 YQ |
2216 | readbuf, writebuf, len); |
2217 | ||
2218 | if (l == 0) | |
2219 | return TARGET_XFER_EOF; | |
2220 | else | |
2221 | { | |
2222 | gdb_assert (l > 0); | |
2223 | *xfered_len = (ULONGEST) l; | |
2224 | return TARGET_XFER_OK; | |
2225 | } | |
2226 | } | |
569283d4 | 2227 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
2228 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
2229 | if (writebuf != NULL || readbuf == NULL) | |
2230 | { | |
2231 | /* Support only read. */ | |
2ed4b548 | 2232 | return TARGET_XFER_E_IO; |
f00c55f8 | 2233 | } |
089354bb | 2234 | return darwin_read_dyld_info (priv->task, offset, readbuf, len, |
9b409511 | 2235 | xfered_len); |
569283d4 | 2236 | #endif |
f00c55f8 | 2237 | default: |
2ed4b548 | 2238 | return TARGET_XFER_E_IO; |
f00c55f8 | 2239 | } |
a80b95ba | 2240 | |
a80b95ba TG |
2241 | } |
2242 | ||
2243 | static void | |
0fc76421 | 2244 | set_enable_mach_exceptions (const char *args, int from_tty, |
a80b95ba TG |
2245 | struct cmd_list_element *c) |
2246 | { | |
bb00b29d | 2247 | if (!ptid_equal (inferior_ptid, null_ptid)) |
a80b95ba | 2248 | { |
bb00b29d | 2249 | struct inferior *inf = current_inferior (); |
089354bb | 2250 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
2251 | exception_mask_t mask; |
2252 | kern_return_t kret; | |
2253 | ||
2254 | if (enable_mach_exceptions) | |
2255 | mask = EXC_MASK_ALL; | |
2256 | else | |
2257 | { | |
089354bb | 2258 | darwin_restore_exception_ports (priv); |
bb00b29d | 2259 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
a80b95ba | 2260 | } |
089354bb | 2261 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
a80b95ba TG |
2262 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2263 | MACH_CHECK_ERROR (kret); | |
2264 | } | |
2265 | } | |
2266 | ||
bb00b29d | 2267 | static char * |
8dd27370 | 2268 | darwin_pid_to_exec_file (struct target_ops *self, int pid) |
bb00b29d | 2269 | { |
b4ab256d | 2270 | static char path[PATH_MAX]; |
bb00b29d TG |
2271 | int res; |
2272 | ||
d8d2a3ee | 2273 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2274 | if (res >= 0) |
2275 | return path; | |
2276 | else | |
2277 | return NULL; | |
2278 | } | |
2279 | ||
2280 | static ptid_t | |
1e6b91a4 | 2281 | darwin_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) |
bb00b29d | 2282 | { |
bb00b29d | 2283 | struct inferior *inf = current_inferior (); |
089354bb | 2284 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2285 | kern_return_t kret; |
2286 | mach_port_name_array_t names; | |
2287 | mach_msg_type_number_t names_count; | |
2288 | mach_port_type_array_t types; | |
2289 | mach_msg_type_number_t types_count; | |
2290 | long res = 0; | |
2291 | ||
2292 | /* First linear search. */ | |
089354bb SM |
2293 | for (darwin_thread_t *t : priv->threads) |
2294 | { | |
2295 | if (t->inf_port == lwp) | |
2296 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); | |
2297 | } | |
bb00b29d TG |
2298 | |
2299 | /* Maybe the port was never extract. Do it now. */ | |
2300 | ||
2301 | /* First get inferior port names. */ | |
089354bb | 2302 | kret = mach_port_names (priv->task, &names, &names_count, &types, |
bb00b29d TG |
2303 | &types_count); |
2304 | MACH_CHECK_ERROR (kret); | |
2305 | if (kret != KERN_SUCCESS) | |
2306 | return null_ptid; | |
2307 | ||
2308 | /* For each name, copy the right in the gdb space and then compare with | |
2309 | our view of the inferior threads. We don't forget to deallocate the | |
2310 | right. */ | |
089354bb | 2311 | for (int i = 0; i < names_count; i++) |
bb00b29d TG |
2312 | { |
2313 | mach_port_t local_name; | |
2314 | mach_msg_type_name_t local_type; | |
2315 | ||
2316 | /* We just need to know the corresponding name in gdb name space. | |
2317 | So extract and deallocate the right. */ | |
089354bb | 2318 | kret = mach_port_extract_right (priv->task, names[i], |
bb00b29d TG |
2319 | MACH_MSG_TYPE_COPY_SEND, |
2320 | &local_name, &local_type); | |
2321 | if (kret != KERN_SUCCESS) | |
2322 | continue; | |
2323 | mach_port_deallocate (gdb_task, local_name); | |
2324 | ||
089354bb SM |
2325 | for (darwin_thread_t *t : priv->threads) |
2326 | { | |
2327 | if (t->gdb_port == local_name) | |
2328 | { | |
2329 | t->inf_port = names[i]; | |
2330 | if (names[i] == lwp) | |
2331 | res = t->gdb_port; | |
2332 | } | |
2333 | } | |
bb00b29d TG |
2334 | } |
2335 | ||
2336 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2337 | names_count * sizeof (mach_port_t)); | |
2338 | ||
2339 | if (res) | |
2340 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); | |
2341 | else | |
2342 | return null_ptid; | |
2343 | } | |
2344 | ||
2345 | static int | |
86ce2668 | 2346 | darwin_supports_multi_process (struct target_ops *self) |
bb00b29d TG |
2347 | { |
2348 | return 1; | |
2349 | } | |
2350 | ||
a80b95ba | 2351 | void |
bb00b29d | 2352 | _initialize_darwin_inferior (void) |
a80b95ba TG |
2353 | { |
2354 | kern_return_t kret; | |
2355 | ||
a80b95ba TG |
2356 | gdb_task = mach_task_self (); |
2357 | darwin_host_self = mach_host_self (); | |
2358 | ||
2359 | /* Read page size. */ | |
2360 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2361 | if (kret != KERN_SUCCESS) | |
2362 | { | |
2363 | mach_page_size = 0x1000; | |
2364 | MACH_CHECK_ERROR (kret); | |
2365 | } | |
2366 | ||
a80b95ba TG |
2367 | darwin_ops = inf_child_target (); |
2368 | ||
a80b95ba TG |
2369 | darwin_ops->to_create_inferior = darwin_create_inferior; |
2370 | darwin_ops->to_attach = darwin_attach; | |
2371 | darwin_ops->to_attach_no_wait = 0; | |
2372 | darwin_ops->to_detach = darwin_detach; | |
2373 | darwin_ops->to_files_info = darwin_files_info; | |
bb00b29d | 2374 | darwin_ops->to_wait = darwin_wait_to; |
a80b95ba TG |
2375 | darwin_ops->to_mourn_inferior = darwin_mourn_inferior; |
2376 | darwin_ops->to_kill = darwin_kill_inferior; | |
bfedc46a | 2377 | darwin_ops->to_interrupt = darwin_interrupt; |
bb00b29d | 2378 | darwin_ops->to_resume = darwin_resume_to; |
a80b95ba TG |
2379 | darwin_ops->to_thread_alive = darwin_thread_alive; |
2380 | darwin_ops->to_pid_to_str = darwin_pid_to_str; | |
bb00b29d | 2381 | darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file; |
a80b95ba | 2382 | darwin_ops->to_load = NULL; |
a80b95ba | 2383 | darwin_ops->to_xfer_partial = darwin_xfer_partial; |
bb00b29d TG |
2384 | darwin_ops->to_supports_multi_process = darwin_supports_multi_process; |
2385 | darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid; | |
a80b95ba TG |
2386 | |
2387 | darwin_complete_target (darwin_ops); | |
2388 | ||
2389 | add_target (darwin_ops); | |
2390 | ||
3eb831e0 TG |
2391 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), |
2392 | (unsigned long) mach_task_self (), getpid ()); | |
a80b95ba | 2393 | |
ccce17b0 YQ |
2394 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2395 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2396 | Set if printing inferior communication debugging statements."), _("\ |
2397 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2398 | NULL, NULL, |
2399 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2400 | |
2401 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2402 | &enable_mach_exceptions, _("\ | |
2403 | Set if mach exceptions are caught."), _("\ | |
2404 | Show if mach exceptions are caught."), _("\ | |
2405 | When this mode is on, all low level exceptions are reported before being\n\ | |
2406 | reported by the kernel."), | |
2407 | &set_enable_mach_exceptions, NULL, | |
2408 | &setlist, &showlist); | |
2409 | } |