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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
e2882c85 | 2 | Copyright (C) 2008-2018 Free Software Foundation, Inc. |
a80b95ba TG |
3 | |
4 | Contributed by AdaCore. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
47d48711 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
a80b95ba TG |
20 | |
21 | #include "defs.h" | |
22 | #include "top.h" | |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "symfile.h" | |
26 | #include "symtab.h" | |
27 | #include "objfiles.h" | |
a80b95ba TG |
28 | #include "gdbcmd.h" |
29 | #include "gdbcore.h" | |
30 | #include "gdbthread.h" | |
31 | #include "regcache.h" | |
32 | #include "event-top.h" | |
33 | #include "inf-loop.h" | |
53ce3c39 | 34 | #include <sys/stat.h> |
a80b95ba TG |
35 | #include "inf-child.h" |
36 | #include "value.h" | |
37 | #include "arch-utils.h" | |
38 | #include "bfd.h" | |
ece0061f | 39 | #include "bfd/mach-o.h" |
a80b95ba TG |
40 | |
41 | #include <sys/ptrace.h> | |
42 | #include <sys/signal.h> | |
4ac15b59 | 43 | #include <setjmp.h> |
a80b95ba TG |
44 | #include <sys/types.h> |
45 | #include <unistd.h> | |
46 | #include <signal.h> | |
a80b95ba | 47 | #include <ctype.h> |
a80b95ba TG |
48 | #include <sys/sysctl.h> |
49 | #include <sys/proc.h> | |
bb00b29d TG |
50 | #include <libproc.h> |
51 | #include <sys/syscall.h> | |
e69860f1 | 52 | #include <spawn.h> |
a80b95ba TG |
53 | |
54 | #include <mach/mach_error.h> | |
55 | #include <mach/mach_vm.h> | |
56 | #include <mach/mach_init.h> | |
57 | #include <mach/vm_map.h> | |
58 | #include <mach/task.h> | |
59 | #include <mach/mach_port.h> | |
60 | #include <mach/thread_act.h> | |
61 | #include <mach/port.h> | |
62 | ||
63 | #include "darwin-nat.h" | |
21ff4686 | 64 | #include "common/filestuff.h" |
01ec7a27 | 65 | #include "nat/fork-inferior.h" |
a80b95ba TG |
66 | |
67 | /* Quick overview. | |
68 | Darwin kernel is Mach + BSD derived kernel. Note that they share the | |
69 | same memory space and are linked together (ie there is no micro-kernel). | |
70 | ||
71 | Although ptrace(2) is available on Darwin, it is not complete. We have | |
72 | to use Mach calls to read and write memory and to modify registers. We | |
73 | also use Mach to get inferior faults. As we cannot use select(2) or | |
74 | signals with Mach port (the Mach communication channel), signals are | |
75 | reported to gdb as an exception. Furthermore we detect death of the | |
76 | inferior through a Mach notification message. This way we only wait | |
77 | on Mach ports. | |
78 | ||
79 | Some Mach documentation is available for Apple xnu source package or | |
80 | from the web. */ | |
81 | ||
82 | ||
83 | #define PTRACE(CMD, PID, ADDR, SIG) \ | |
84 | darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG)) | |
85 | ||
bb00b29d TG |
86 | static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status); |
87 | ||
a80b95ba TG |
88 | static void darwin_ptrace_me (void); |
89 | ||
90 | static void darwin_ptrace_him (int pid); | |
91 | ||
a41f2563 TG |
92 | static void darwin_encode_reply (mig_reply_error_t *reply, |
93 | mach_msg_header_t *hdr, integer_t code); | |
94 | ||
82b19a4d TG |
95 | static void darwin_setup_request_notification (struct inferior *inf); |
96 | static void darwin_deallocate_exception_ports (darwin_inferior *inf); | |
97 | static void darwin_setup_exceptions (struct inferior *inf); | |
98 | static void darwin_deallocate_threads (struct inferior *inf); | |
99 | ||
a80b95ba TG |
100 | /* Target operations for Darwin. */ |
101 | static struct target_ops *darwin_ops; | |
102 | ||
103 | /* Task identifier of gdb. */ | |
104 | static task_t gdb_task; | |
105 | ||
106 | /* A copy of mach_host_self (). */ | |
107 | mach_port_t darwin_host_self; | |
108 | ||
109 | /* Exception port. */ | |
110 | mach_port_t darwin_ex_port; | |
111 | ||
a6290449 | 112 | /* Port set, to wait for answer on all ports. */ |
a80b95ba TG |
113 | mach_port_t darwin_port_set; |
114 | ||
0963b4bd | 115 | /* Page size. */ |
a80b95ba TG |
116 | static vm_size_t mach_page_size; |
117 | ||
118 | /* If Set, catch all mach exceptions (before they are converted to signals | |
119 | by the kernel). */ | |
120 | static int enable_mach_exceptions; | |
121 | ||
bb00b29d TG |
122 | /* Inferior that should report a fake stop event. */ |
123 | static struct inferior *darwin_inf_fake_stop; | |
124 | ||
a80b95ba TG |
125 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
126 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
127 | ||
bb00b29d | 128 | /* This controls output of inferior debugging. */ |
ccce17b0 | 129 | static unsigned int darwin_debug_flag = 0; |
a80b95ba | 130 | |
15c19d39 TG |
131 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
132 | be signed. This is required to get an authorization for task_for_pid. | |
133 | ||
a6290449 TG |
134 | Once gdb is built, you must codesign it with any system-trusted signing |
135 | authority. See taskgated(8) for details. */ | |
15c19d39 TG |
136 | static const unsigned char info_plist[] |
137 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
138 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
139 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
140 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
141 | "<plist version=\"1.0\">\n" | |
142 | "<dict>\n" | |
143 | " <key>CFBundleIdentifier</key>\n" | |
144 | " <string>org.gnu.gdb</string>\n" | |
145 | " <key>CFBundleName</key>\n" | |
146 | " <string>gdb</string>\n" | |
147 | " <key>CFBundleVersion</key>\n" | |
148 | " <string>1.0</string>\n" | |
149 | " <key>SecTaskAccess</key>\n" | |
150 | " <array>\n" | |
151 | " <string>allowed</string>\n" | |
152 | " <string>debug</string>\n" | |
153 | " </array>\n" | |
154 | "</dict>\n" | |
155 | "</plist>\n"; | |
156 | ||
77b64a49 PA |
157 | static void inferior_debug (int level, const char *fmt, ...) |
158 | ATTRIBUTE_PRINTF (2, 3); | |
159 | ||
a80b95ba TG |
160 | static void |
161 | inferior_debug (int level, const char *fmt, ...) | |
162 | { | |
163 | va_list ap; | |
164 | ||
165 | if (darwin_debug_flag < level) | |
166 | return; | |
167 | ||
168 | va_start (ap, fmt); | |
169 | printf_unfiltered (_("[%d inferior]: "), getpid ()); | |
170 | vprintf_unfiltered (fmt, ap); | |
171 | va_end (ap); | |
172 | } | |
173 | ||
174 | void | |
175 | mach_check_error (kern_return_t ret, const char *file, | |
176 | unsigned int line, const char *func) | |
177 | { | |
178 | if (ret == KERN_SUCCESS) | |
179 | return; | |
180 | if (func == NULL) | |
181 | func = _("[UNKNOWN]"); | |
bb00b29d | 182 | |
4f1cdeec | 183 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 184 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
185 | } |
186 | ||
187 | static const char * | |
188 | unparse_exception_type (unsigned int i) | |
189 | { | |
190 | static char unknown_exception_buf[32]; | |
191 | ||
192 | switch (i) | |
193 | { | |
194 | case EXC_BAD_ACCESS: | |
195 | return "EXC_BAD_ACCESS"; | |
196 | case EXC_BAD_INSTRUCTION: | |
197 | return "EXC_BAD_INSTRUCTION"; | |
198 | case EXC_ARITHMETIC: | |
199 | return "EXC_ARITHMETIC"; | |
200 | case EXC_EMULATION: | |
201 | return "EXC_EMULATION"; | |
202 | case EXC_SOFTWARE: | |
203 | return "EXC_SOFTWARE"; | |
204 | case EXC_BREAKPOINT: | |
205 | return "EXC_BREAKPOINT"; | |
206 | case EXC_SYSCALL: | |
207 | return "EXC_SYSCALL"; | |
208 | case EXC_MACH_SYSCALL: | |
209 | return "EXC_MACH_SYSCALL"; | |
210 | case EXC_RPC_ALERT: | |
211 | return "EXC_RPC_ALERT"; | |
212 | case EXC_CRASH: | |
213 | return "EXC_CRASH"; | |
214 | default: | |
215 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
216 | return unknown_exception_buf; | |
217 | } | |
218 | } | |
219 | ||
a7aa0d73 JB |
220 | /* Set errno to zero, and then call ptrace with the given arguments. |
221 | If inferior debugging traces are on, then also print a debug | |
222 | trace. | |
223 | ||
224 | The returned value is the same as the value returned by ptrace, | |
225 | except in the case where that value is -1 but errno is zero. | |
226 | This case is documented to be a non-error situation, so we | |
227 | return zero in that case. */ | |
228 | ||
a80b95ba TG |
229 | static int |
230 | darwin_ptrace (const char *name, | |
aa14fb50 | 231 | int request, int pid, caddr_t arg3, int arg4) |
a80b95ba TG |
232 | { |
233 | int ret; | |
234 | ||
a7aa0d73 | 235 | errno = 0; |
aa14fb50 | 236 | ret = ptrace (request, pid, arg3, arg4); |
a7aa0d73 JB |
237 | if (ret == -1 && errno == 0) |
238 | ret = 0; | |
a80b95ba | 239 | |
3eb831e0 TG |
240 | inferior_debug (4, _("ptrace (%s, %d, 0x%lx, %d): %d (%s)\n"), |
241 | name, pid, (unsigned long) arg3, arg4, ret, | |
a3224241 | 242 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
243 | return ret; |
244 | } | |
245 | ||
246 | static int | |
247 | cmp_thread_t (const void *l, const void *r) | |
248 | { | |
bb00b29d TG |
249 | thread_t tl = *(const thread_t *)l; |
250 | thread_t tr = *(const thread_t *)r; | |
251 | return (int)(tl - tr); | |
a80b95ba TG |
252 | } |
253 | ||
254 | static void | |
bb00b29d | 255 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
256 | { |
257 | kern_return_t kret; | |
a80b95ba TG |
258 | thread_array_t thread_list; |
259 | unsigned int new_nbr; | |
260 | unsigned int old_nbr; | |
261 | unsigned int new_ix, old_ix; | |
089354bb SM |
262 | darwin_inferior *darwin_inf = get_darwin_inferior (inf); |
263 | std::vector<darwin_thread_t *> new_thread_vec; | |
a80b95ba TG |
264 | |
265 | /* Get list of threads. */ | |
bb00b29d | 266 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
267 | MACH_CHECK_ERROR (kret); |
268 | if (kret != KERN_SUCCESS) | |
269 | return; | |
270 | ||
bb00b29d | 271 | /* Sort the list. */ |
a80b95ba TG |
272 | if (new_nbr > 1) |
273 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
274 | ||
089354bb | 275 | old_nbr = darwin_inf->threads.size (); |
a80b95ba | 276 | |
bb00b29d TG |
277 | /* Quick check for no changes. */ |
278 | if (old_nbr == new_nbr) | |
279 | { | |
089354bb SM |
280 | size_t i; |
281 | ||
bb00b29d | 282 | for (i = 0; i < new_nbr; i++) |
089354bb | 283 | if (thread_list[i] != darwin_inf->threads[i]->gdb_port) |
bb00b29d TG |
284 | break; |
285 | if (i == new_nbr) | |
286 | { | |
15a9128a TG |
287 | /* Deallocate ports. */ |
288 | for (i = 0; i < new_nbr; i++) | |
289 | { | |
290 | kret = mach_port_deallocate (mach_task_self (), thread_list[i]); | |
291 | MACH_CHECK_ERROR (kret); | |
292 | } | |
293 | ||
294 | /* Deallocate the buffer. */ | |
bb00b29d TG |
295 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
296 | new_nbr * sizeof (int)); | |
297 | MACH_CHECK_ERROR (kret); | |
15a9128a | 298 | |
bb00b29d TG |
299 | return; |
300 | } | |
301 | } | |
302 | ||
82b19a4d | 303 | /* Full handling: detect new threads, remove dead threads. */ |
089354bb SM |
304 | |
305 | new_thread_vec.reserve (new_nbr); | |
bb00b29d | 306 | |
a80b95ba TG |
307 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
308 | { | |
089354bb SM |
309 | thread_t new_id = (new_ix < new_nbr) ? thread_list[new_ix] : THREAD_NULL; |
310 | darwin_thread_t *old | |
311 | = (old_ix < old_nbr) ? darwin_inf->threads[old_ix] : NULL; | |
312 | thread_t old_id = old != NULL ? old->gdb_port : THREAD_NULL; | |
bb00b29d TG |
313 | |
314 | inferior_debug | |
c8c9911f | 315 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"), |
bb00b29d | 316 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
a80b95ba TG |
317 | |
318 | if (old_id == new_id) | |
319 | { | |
320 | /* Thread still exist. */ | |
089354bb | 321 | new_thread_vec.push_back (old); |
a80b95ba TG |
322 | new_ix++; |
323 | old_ix++; | |
324 | ||
15a9128a TG |
325 | /* Deallocate the port. */ |
326 | kret = mach_port_deallocate (gdb_task, new_id); | |
a80b95ba | 327 | MACH_CHECK_ERROR (kret); |
15a9128a | 328 | |
a80b95ba TG |
329 | continue; |
330 | } | |
bb00b29d TG |
331 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
332 | { | |
333 | /* Ignore dead ports. | |
334 | In some weird cases, we might get dead ports. They should | |
335 | correspond to dead thread so they could safely be ignored. */ | |
336 | new_ix++; | |
337 | continue; | |
338 | } | |
339 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
340 | { |
341 | /* A thread was created. */ | |
7aabaf9d | 342 | darwin_thread_info *pti = new darwin_thread_info; |
a80b95ba | 343 | |
bb00b29d TG |
344 | pti->gdb_port = new_id; |
345 | pti->msg_state = DARWIN_RUNNING; | |
346 | ||
db665f42 SM |
347 | /* Add the new thread. */ |
348 | add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti); | |
089354bb | 349 | new_thread_vec.push_back (pti); |
a80b95ba TG |
350 | new_ix++; |
351 | continue; | |
352 | } | |
bb00b29d | 353 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
354 | { |
355 | /* A thread was removed. */ | |
356 | delete_thread (ptid_build (inf->pid, 0, old_id)); | |
357 | kret = mach_port_deallocate (gdb_task, old_id); | |
358 | MACH_CHECK_ERROR (kret); | |
359 | old_ix++; | |
bb00b29d | 360 | continue; |
a80b95ba | 361 | } |
f3574227 | 362 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
363 | } |
364 | ||
089354bb | 365 | darwin_inf->threads = std::move (new_thread_vec); |
a80b95ba | 366 | |
15a9128a | 367 | /* Deallocate the buffer. */ |
a80b95ba TG |
368 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
369 | new_nbr * sizeof (int)); | |
370 | MACH_CHECK_ERROR (kret); | |
371 | } | |
372 | ||
bb00b29d TG |
373 | static int |
374 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 375 | { |
089354bb SM |
376 | darwin_inferior *priv = get_darwin_inferior (inf); |
377 | ||
378 | return priv->task == *(task_t *)port_ptr; | |
bb00b29d | 379 | } |
a80b95ba | 380 | |
bb00b29d | 381 | static int |
82b19a4d | 382 | find_inferior_pid_it (struct inferior *inf, void *pid_ptr) |
bb00b29d | 383 | { |
82b19a4d | 384 | return inf->pid == *(int *)pid_ptr; |
a80b95ba TG |
385 | } |
386 | ||
bb00b29d TG |
387 | /* Return an inferior by task port. */ |
388 | static struct inferior * | |
389 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 390 | { |
bb00b29d TG |
391 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
392 | } | |
a80b95ba | 393 | |
82b19a4d | 394 | /* Return an inferior by pid port. */ |
bb00b29d | 395 | static struct inferior * |
82b19a4d | 396 | darwin_find_inferior_by_pid (int pid) |
bb00b29d | 397 | { |
82b19a4d | 398 | return iterate_over_inferiors (&find_inferior_pid_it, &pid); |
bb00b29d | 399 | } |
a80b95ba | 400 | |
bb00b29d TG |
401 | /* Return a thread by port. */ |
402 | static darwin_thread_t * | |
403 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
404 | { | |
089354bb SM |
405 | darwin_inferior *priv = get_darwin_inferior (inf); |
406 | ||
407 | for (darwin_thread_t *t : priv->threads) | |
408 | { | |
409 | if (t->gdb_port == thread) | |
410 | return t; | |
411 | } | |
bb00b29d | 412 | |
bb00b29d TG |
413 | return NULL; |
414 | } | |
a80b95ba | 415 | |
bb00b29d | 416 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 417 | |
bb00b29d TG |
418 | static void |
419 | darwin_suspend_inferior (struct inferior *inf) | |
420 | { | |
089354bb SM |
421 | darwin_inferior *priv = get_darwin_inferior (inf); |
422 | ||
423 | if (!priv->suspended) | |
a80b95ba | 424 | { |
bb00b29d | 425 | kern_return_t kret; |
a80b95ba | 426 | |
089354bb | 427 | kret = task_suspend (priv->task); |
bb00b29d | 428 | MACH_CHECK_ERROR (kret); |
a80b95ba | 429 | |
089354bb | 430 | priv->suspended = 1; |
bb00b29d TG |
431 | } |
432 | } | |
a80b95ba | 433 | |
bb00b29d | 434 | /* Resume an inferior at Mach level. */ |
a80b95ba | 435 | |
bb00b29d TG |
436 | static void |
437 | darwin_resume_inferior (struct inferior *inf) | |
438 | { | |
089354bb SM |
439 | darwin_inferior *priv = get_darwin_inferior (inf); |
440 | ||
441 | if (priv->suspended) | |
bb00b29d TG |
442 | { |
443 | kern_return_t kret; | |
a80b95ba | 444 | |
089354bb | 445 | kret = task_resume (priv->task); |
bb00b29d TG |
446 | MACH_CHECK_ERROR (kret); |
447 | ||
089354bb | 448 | priv->suspended = 0; |
a80b95ba TG |
449 | } |
450 | } | |
451 | ||
bb00b29d TG |
452 | /* Iterator functions. */ |
453 | ||
454 | static int | |
455 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 456 | { |
bb00b29d TG |
457 | darwin_suspend_inferior (inf); |
458 | darwin_check_new_threads (inf); | |
459 | return 0; | |
460 | } | |
461 | ||
462 | static int | |
463 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
464 | { | |
465 | darwin_resume_inferior (inf); | |
466 | return 0; | |
a80b95ba TG |
467 | } |
468 | ||
bb00b29d TG |
469 | static void |
470 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
471 | { | |
472 | printf_unfiltered (_("message header:\n")); | |
473 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
474 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
475 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
476 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
477 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
478 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
479 | ||
480 | if (disp_body) | |
481 | { | |
482 | const unsigned char *data; | |
a6290449 | 483 | const unsigned int *ldata; |
bb00b29d TG |
484 | int size; |
485 | int i; | |
486 | ||
487 | data = (unsigned char *)(hdr + 1); | |
488 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
489 | ||
490 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
491 | { | |
492 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
493 | mach_msg_port_descriptor_t *desc = | |
494 | (mach_msg_port_descriptor_t *)(bod + 1); | |
495 | int k; | |
496 | NDR_record_t *ndr; | |
497 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
498 | bod->msgh_descriptor_count); | |
499 | data += sizeof (mach_msg_body_t); | |
500 | size -= sizeof (mach_msg_body_t); | |
501 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
502 | switch (desc[k].type) | |
503 | { | |
504 | case MACH_MSG_PORT_DESCRIPTOR: | |
505 | printf_unfiltered | |
506 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
507 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
508 | break; | |
509 | default: | |
510 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
511 | k, desc[k].type); | |
512 | break; | |
513 | } | |
514 | data += bod->msgh_descriptor_count | |
515 | * sizeof (mach_msg_port_descriptor_t); | |
516 | size -= bod->msgh_descriptor_count | |
517 | * sizeof (mach_msg_port_descriptor_t); | |
518 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
519 | printf_unfiltered | |
520 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
521 | "int=%02x char=%02x float=%02x\n"), | |
522 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
523 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
524 | data += sizeof (NDR_record_t); | |
525 | size -= sizeof (NDR_record_t); | |
526 | } | |
527 | ||
528 | printf_unfiltered (_(" data:")); | |
a6290449 TG |
529 | ldata = (const unsigned int *)data; |
530 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
531 | printf_unfiltered (" %08x", ldata[i]); | |
bb00b29d TG |
532 | printf_unfiltered (_("\n")); |
533 | } | |
534 | } | |
535 | ||
82b19a4d TG |
536 | /* Adjust inferior data when a new task was created. */ |
537 | ||
538 | static struct inferior * | |
539 | darwin_find_new_inferior (task_t task_port, thread_t thread_port) | |
540 | { | |
541 | int task_pid; | |
542 | struct inferior *inf; | |
543 | kern_return_t kret; | |
544 | mach_port_t prev; | |
545 | ||
546 | /* Find the corresponding pid. */ | |
547 | kret = pid_for_task (task_port, &task_pid); | |
548 | if (kret != KERN_SUCCESS) | |
549 | { | |
550 | MACH_CHECK_ERROR (kret); | |
551 | return NULL; | |
552 | } | |
553 | ||
554 | /* Find the inferior for this pid. */ | |
555 | inf = darwin_find_inferior_by_pid (task_pid); | |
556 | if (inf == NULL) | |
557 | return NULL; | |
558 | ||
089354bb SM |
559 | darwin_inferior *priv = get_darwin_inferior (inf); |
560 | ||
82b19a4d | 561 | /* Deallocate saved exception ports. */ |
089354bb | 562 | darwin_deallocate_exception_ports (priv); |
82b19a4d TG |
563 | |
564 | /* No need to remove dead_name notification, but still... */ | |
089354bb | 565 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d TG |
566 | MACH_NOTIFY_DEAD_NAME, 0, |
567 | MACH_PORT_NULL, | |
568 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
569 | &prev); | |
570 | if (kret != KERN_INVALID_ARGUMENT) | |
571 | MACH_CHECK_ERROR (kret); | |
572 | ||
573 | /* Replace old task port. */ | |
089354bb | 574 | kret = mach_port_deallocate (gdb_task, priv->task); |
82b19a4d | 575 | MACH_CHECK_ERROR (kret); |
089354bb | 576 | priv->task = task_port; |
82b19a4d TG |
577 | |
578 | darwin_setup_request_notification (inf); | |
579 | darwin_setup_exceptions (inf); | |
580 | ||
581 | return inf; | |
582 | } | |
583 | ||
584 | /* Check data representation. */ | |
585 | ||
586 | static int | |
587 | darwin_check_message_ndr (NDR_record_t *ndr) | |
588 | { | |
589 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
590 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
591 | || ndr->mig_encoding != NDR_record.mig_encoding | |
592 | || ndr->int_rep != NDR_record.int_rep | |
593 | || ndr->char_rep != NDR_record.char_rep | |
594 | || ndr->float_rep != NDR_record.float_rep) | |
595 | return -1; | |
596 | return 0; | |
597 | } | |
598 | ||
599 | /* Decode an exception message. */ | |
600 | ||
bb00b29d TG |
601 | static int |
602 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
603 | struct inferior **pinf, | |
604 | darwin_thread_t **pthread) | |
a80b95ba | 605 | { |
bb00b29d TG |
606 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
607 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
608 | NDR_record_t *ndr; | |
609 | integer_t *data; | |
610 | struct inferior *inf; | |
611 | darwin_thread_t *thread; | |
612 | task_t task_port; | |
613 | thread_t thread_port; | |
a80b95ba | 614 | kern_return_t kret; |
bb00b29d | 615 | int i; |
a80b95ba | 616 | |
a41f2563 TG |
617 | /* Check message destination. */ |
618 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
619 | return -1; |
620 | ||
621 | /* Check message header. */ | |
622 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
623 | return -1; | |
624 | ||
625 | /* Check descriptors. */ | |
626 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
627 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
628 | || bod->msgh_descriptor_count != 2 | |
629 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
630 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
631 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
632 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
633 | return -1; | |
634 | ||
635 | /* Check data representation. */ | |
636 | ndr = (NDR_record_t *)(desc + 2); | |
82b19a4d | 637 | if (darwin_check_message_ndr (ndr) != 0) |
bb00b29d TG |
638 | return -1; |
639 | ||
640 | /* Ok, the hard work. */ | |
641 | data = (integer_t *)(ndr + 1); | |
642 | ||
bb00b29d TG |
643 | task_port = desc[1].name; |
644 | thread_port = desc[0].name; | |
a41f2563 | 645 | |
a41f2563 | 646 | /* Find process by port. */ |
bb00b29d | 647 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 648 | *pinf = inf; |
82b19a4d TG |
649 | |
650 | if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2 | |
651 | && data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP) | |
652 | { | |
653 | /* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0, | |
654 | as a new Mach task is created when a process exec. */ | |
655 | inf = darwin_find_new_inferior (task_port, thread_port); | |
656 | *pinf = inf; | |
657 | ||
658 | if (inf == NULL) | |
659 | { | |
660 | /* Deallocate task_port, unless it was saved. */ | |
661 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
662 | MACH_CHECK_ERROR (kret); | |
663 | } | |
664 | } | |
665 | else | |
666 | { | |
667 | /* We got new rights to the task, get rid of it. Do not get rid of | |
668 | thread right, as we will need it to find the thread. */ | |
669 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
670 | MACH_CHECK_ERROR (kret); | |
671 | } | |
672 | ||
a41f2563 TG |
673 | if (inf == NULL) |
674 | { | |
675 | /* Not a known inferior. This could happen if the child fork, as | |
676 | the created process will inherit its exception port. | |
677 | FIXME: should the exception port be restored ? */ | |
678 | kern_return_t kret; | |
679 | mig_reply_error_t reply; | |
680 | ||
82b19a4d TG |
681 | inferior_debug |
682 | (4, _("darwin_decode_exception_message: unknown task 0x%x\n"), | |
683 | task_port); | |
684 | ||
15a9128a TG |
685 | /* Free thread port (we don't know it). */ |
686 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
687 | MACH_CHECK_ERROR (kret); | |
688 | ||
a41f2563 TG |
689 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); |
690 | ||
691 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
692 | reply.Head.msgh_size, 0, | |
693 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
694 | MACH_PORT_NULL); | |
695 | MACH_CHECK_ERROR (kret); | |
696 | ||
697 | return 0; | |
698 | } | |
bb00b29d TG |
699 | |
700 | /* Find thread by port. */ | |
701 | /* Check for new threads. Do it early so that the port in the exception | |
702 | message can be deallocated. */ | |
703 | darwin_check_new_threads (inf); | |
704 | ||
15a9128a TG |
705 | /* Free the thread port (as gdb knows the thread, it has already has a right |
706 | for it, so this just decrement a reference counter). */ | |
707 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
708 | MACH_CHECK_ERROR (kret); | |
709 | ||
bb00b29d TG |
710 | thread = darwin_find_thread (inf, thread_port); |
711 | if (thread == NULL) | |
712 | return -1; | |
713 | *pthread = thread; | |
714 | ||
a6290449 TG |
715 | /* The thread should be running. However we have observed cases where a |
716 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
717 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
718 | ||
bb00b29d | 719 | /* Finish decoding. */ |
bb00b29d TG |
720 | thread->event.header = *hdr; |
721 | thread->event.thread_port = thread_port; | |
722 | thread->event.task_port = task_port; | |
723 | thread->event.ex_type = data[0]; | |
724 | thread->event.data_count = data[1]; | |
725 | ||
726 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
727 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
728 | + data[1] * sizeof (integer_t))) | |
729 | return -1; | |
730 | for (i = 0; i < data[1]; i++) | |
731 | thread->event.ex_data[i] = data[2 + i]; | |
732 | ||
733 | thread->msg_state = DARWIN_MESSAGE; | |
734 | ||
735 | return 0; | |
736 | } | |
737 | ||
82b19a4d TG |
738 | /* Decode dead_name notify message. */ |
739 | ||
740 | static int | |
741 | darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf) | |
742 | { | |
743 | NDR_record_t *ndr = (NDR_record_t *)(hdr + 1); | |
744 | integer_t *data = (integer_t *)(ndr + 1); | |
745 | struct inferior *inf; | |
746 | darwin_thread_t *thread; | |
747 | task_t task_port; | |
748 | thread_t thread_port; | |
749 | kern_return_t kret; | |
750 | int i; | |
751 | ||
752 | /* Check message header. */ | |
753 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
754 | return -1; | |
755 | ||
756 | /* Check descriptors. */ | |
757 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t))) | |
758 | return -2; | |
759 | ||
760 | /* Check data representation. */ | |
761 | if (darwin_check_message_ndr (ndr) != 0) | |
762 | return -3; | |
763 | ||
764 | task_port = data[0]; | |
765 | ||
766 | /* Find process by port. */ | |
767 | inf = darwin_find_inferior_by_task (task_port); | |
768 | *pinf = inf; | |
769 | ||
089354bb SM |
770 | darwin_inferior *priv = get_darwin_inferior (inf); |
771 | ||
82b19a4d | 772 | /* Check message destination. */ |
089354bb | 773 | if (inf != NULL && hdr->msgh_local_port != priv->notify_port) |
82b19a4d TG |
774 | return -4; |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
bb00b29d TG |
779 | static void |
780 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
781 | integer_t code) | |
782 | { | |
783 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
784 | |
785 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 786 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 787 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
788 | rh->msgh_local_port = MACH_PORT_NULL; |
789 | rh->msgh_id = hdr->msgh_id + 100; | |
790 | ||
791 | reply->NDR = NDR_record; | |
792 | reply->RetCode = code; | |
a80b95ba TG |
793 | } |
794 | ||
bb00b29d TG |
795 | static void |
796 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
797 | { |
798 | kern_return_t kret; | |
bb00b29d | 799 | mig_reply_error_t reply; |
089354bb | 800 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 801 | |
bb00b29d TG |
802 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
803 | ||
804 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
805 | reply.Head.msgh_size, 0, | |
806 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
807 | MACH_PORT_NULL); | |
a80b95ba TG |
808 | MACH_CHECK_ERROR (kret); |
809 | ||
089354bb | 810 | priv->pending_messages--; |
bb00b29d TG |
811 | } |
812 | ||
813 | static void | |
814 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
815 | int step, int nsignal) | |
816 | { | |
817 | kern_return_t kret; | |
818 | int res; | |
819 | ||
a80b95ba | 820 | inferior_debug |
bb00b29d TG |
821 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
822 | thread->msg_state, thread->gdb_port, step, nsignal); | |
823 | ||
824 | switch (thread->msg_state) | |
a80b95ba | 825 | { |
bb00b29d TG |
826 | case DARWIN_MESSAGE: |
827 | if (thread->event.ex_type == EXC_SOFTWARE | |
828 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
829 | { | |
830 | /* Either deliver a new signal or cancel the signal received. */ | |
831 | res = PTRACE (PT_THUPDATE, inf->pid, | |
597e448c | 832 | (caddr_t) (uintptr_t) thread->gdb_port, nsignal); |
bb00b29d TG |
833 | if (res < 0) |
834 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
835 | } | |
836 | else if (nsignal) | |
837 | { | |
838 | /* Note: ptrace is allowed only if the process is stopped. | |
839 | Directly send the signal to the thread. */ | |
840 | res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
841 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), | |
842 | thread->gdb_port, nsignal, res); | |
843 | thread->signaled = 1; | |
844 | } | |
845 | ||
d987a266 | 846 | /* Set or reset single step. */ |
aa14fb50 TG |
847 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
848 | thread->gdb_port, step); | |
849 | darwin_set_sstep (thread->gdb_port, step); | |
850 | thread->single_step = step; | |
bb00b29d TG |
851 | |
852 | darwin_send_reply (inf, thread); | |
853 | thread->msg_state = DARWIN_RUNNING; | |
854 | break; | |
855 | ||
856 | case DARWIN_RUNNING: | |
857 | break; | |
858 | ||
859 | case DARWIN_STOPPED: | |
860 | kret = thread_resume (thread->gdb_port); | |
861 | MACH_CHECK_ERROR (kret); | |
862 | ||
863 | thread->msg_state = DARWIN_RUNNING; | |
864 | break; | |
a80b95ba | 865 | } |
bb00b29d | 866 | } |
a80b95ba | 867 | |
bb00b29d | 868 | /* Resume all threads of the inferior. */ |
a80b95ba | 869 | |
bb00b29d TG |
870 | static void |
871 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
872 | { | |
089354bb | 873 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 874 | |
089354bb | 875 | for (darwin_thread_t *thread : priv->threads) |
bb00b29d | 876 | darwin_resume_thread (inf, thread, step, nsignal); |
a80b95ba TG |
877 | } |
878 | ||
bb00b29d | 879 | struct resume_inferior_threads_param |
a80b95ba | 880 | { |
bb00b29d TG |
881 | int step; |
882 | int nsignal; | |
883 | }; | |
884 | ||
885 | static int | |
886 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
887 | { | |
888 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
889 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
890 | ||
891 | darwin_resume_inferior_threads (inf, step, nsignal); | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
896 | /* Suspend all threads of INF. */ | |
897 | ||
898 | static void | |
899 | darwin_suspend_inferior_threads (struct inferior *inf) | |
900 | { | |
089354bb | 901 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 902 | |
089354bb SM |
903 | for (darwin_thread_t *thread : priv->threads) |
904 | { | |
905 | switch (thread->msg_state) | |
906 | { | |
907 | case DARWIN_STOPPED: | |
908 | case DARWIN_MESSAGE: | |
909 | break; | |
910 | case DARWIN_RUNNING: | |
911 | { | |
912 | kern_return_t kret = thread_suspend (thread->gdb_port); | |
913 | MACH_CHECK_ERROR (kret); | |
914 | thread->msg_state = DARWIN_STOPPED; | |
915 | break; | |
916 | } | |
917 | } | |
918 | } | |
bb00b29d | 919 | } |
a80b95ba | 920 | |
f6ac5f3d PA |
921 | void |
922 | darwin_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signal) | |
bb00b29d TG |
923 | { |
924 | struct target_waitstatus status; | |
925 | int pid; | |
a80b95ba | 926 | |
bb00b29d TG |
927 | kern_return_t kret; |
928 | int res; | |
929 | int nsignal; | |
930 | struct inferior *inf; | |
a80b95ba | 931 | |
bb00b29d | 932 | inferior_debug |
3eb831e0 | 933 | (2, _("darwin_resume: pid=%d, tid=0x%lx, step=%d, signal=%d\n"), |
bb00b29d TG |
934 | ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal); |
935 | ||
a493e3e2 | 936 | if (signal == GDB_SIGNAL_0) |
bb00b29d TG |
937 | nsignal = 0; |
938 | else | |
2ea28649 | 939 | nsignal = gdb_signal_to_host (signal); |
a80b95ba | 940 | |
bb00b29d TG |
941 | /* Don't try to single step all threads. */ |
942 | if (step) | |
943 | ptid = inferior_ptid; | |
944 | ||
945 | /* minus_one_ptid is RESUME_ALL. */ | |
946 | if (ptid_equal (ptid, minus_one_ptid)) | |
a80b95ba | 947 | { |
bb00b29d TG |
948 | struct resume_inferior_threads_param param; |
949 | ||
950 | param.nsignal = nsignal; | |
951 | param.step = step; | |
a80b95ba | 952 | |
bb00b29d TG |
953 | /* Resume threads. */ |
954 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
955 | /* Resume tasks. */ | |
956 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
957 | } | |
958 | else | |
a80b95ba | 959 | { |
c9657e70 | 960 | struct inferior *inf = find_inferior_ptid (ptid); |
bb00b29d TG |
961 | long tid = ptid_get_tid (ptid); |
962 | ||
963 | /* Stop the inferior (should be useless). */ | |
964 | darwin_suspend_inferior (inf); | |
965 | ||
966 | if (tid == 0) | |
967 | darwin_resume_inferior_threads (inf, step, nsignal); | |
968 | else | |
969 | { | |
970 | darwin_thread_t *thread; | |
971 | ||
972 | /* Suspend threads of the task. */ | |
973 | darwin_suspend_inferior_threads (inf); | |
974 | ||
975 | /* Resume the selected thread. */ | |
976 | thread = darwin_find_thread (inf, tid); | |
977 | gdb_assert (thread); | |
978 | darwin_resume_thread (inf, thread, step, nsignal); | |
979 | } | |
980 | ||
981 | /* Resume the task. */ | |
982 | darwin_resume_inferior (inf); | |
a80b95ba | 983 | } |
bb00b29d | 984 | } |
a80b95ba | 985 | |
bb00b29d TG |
986 | static ptid_t |
987 | darwin_decode_message (mach_msg_header_t *hdr, | |
988 | darwin_thread_t **pthread, | |
989 | struct inferior **pinf, | |
990 | struct target_waitstatus *status) | |
991 | { | |
992 | darwin_thread_t *thread; | |
993 | struct inferior *inf; | |
a80b95ba | 994 | |
a41f2563 TG |
995 | /* Exception message. 2401 == 0x961 is exc. */ |
996 | if (hdr->msgh_id == 2401) | |
a80b95ba | 997 | { |
bb00b29d TG |
998 | int res; |
999 | ||
1000 | /* Decode message. */ | |
1001 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
1002 | ||
1003 | if (res < 0) | |
a80b95ba | 1004 | { |
bb00b29d | 1005 | /* Should not happen... */ |
c8c9911f JB |
1006 | printf_unfiltered |
1007 | (_("darwin_wait: ill-formatted message (id=0x%x)\n"), hdr->msgh_id); | |
bb00b29d | 1008 | /* FIXME: send a failure reply? */ |
a41f2563 TG |
1009 | status->kind = TARGET_WAITKIND_IGNORE; |
1010 | return minus_one_ptid; | |
1011 | } | |
1012 | if (inf == NULL) | |
1013 | { | |
1014 | status->kind = TARGET_WAITKIND_IGNORE; | |
a80b95ba TG |
1015 | return minus_one_ptid; |
1016 | } | |
bb00b29d TG |
1017 | *pinf = inf; |
1018 | *pthread = thread; | |
089354bb SM |
1019 | |
1020 | darwin_inferior *priv = get_darwin_inferior (inf); | |
1021 | ||
1022 | priv->pending_messages++; | |
a80b95ba TG |
1023 | |
1024 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
1025 | thread->msg_state = DARWIN_MESSAGE; |
1026 | ||
c8c9911f | 1027 | inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"), |
bb00b29d TG |
1028 | thread->gdb_port, |
1029 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 1030 | |
bb00b29d | 1031 | switch (thread->event.ex_type) |
a80b95ba TG |
1032 | { |
1033 | case EXC_BAD_ACCESS: | |
4e225075 | 1034 | status->value.sig = GDB_EXC_BAD_ACCESS; |
a80b95ba TG |
1035 | break; |
1036 | case EXC_BAD_INSTRUCTION: | |
4e225075 | 1037 | status->value.sig = GDB_EXC_BAD_INSTRUCTION; |
a80b95ba TG |
1038 | break; |
1039 | case EXC_ARITHMETIC: | |
4e225075 | 1040 | status->value.sig = GDB_EXC_ARITHMETIC; |
a80b95ba TG |
1041 | break; |
1042 | case EXC_EMULATION: | |
4e225075 | 1043 | status->value.sig = GDB_EXC_EMULATION; |
a80b95ba TG |
1044 | break; |
1045 | case EXC_SOFTWARE: | |
bb00b29d | 1046 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 1047 | { |
bb00b29d | 1048 | status->value.sig = |
2ea28649 | 1049 | gdb_signal_from_host (thread->event.ex_data[1]); |
bb00b29d TG |
1050 | inferior_debug (5, _(" (signal %d: %s)\n"), |
1051 | thread->event.ex_data[1], | |
2ea28649 | 1052 | gdb_signal_to_name (status->value.sig)); |
bb00b29d TG |
1053 | |
1054 | /* If the thread is stopped because it has received a signal | |
1055 | that gdb has just sent, continue. */ | |
1056 | if (thread->signaled) | |
1057 | { | |
1058 | thread->signaled = 0; | |
1059 | darwin_send_reply (inf, thread); | |
1060 | thread->msg_state = DARWIN_RUNNING; | |
1061 | status->kind = TARGET_WAITKIND_IGNORE; | |
1062 | } | |
a80b95ba TG |
1063 | } |
1064 | else | |
4e225075 | 1065 | status->value.sig = GDB_EXC_SOFTWARE; |
a80b95ba TG |
1066 | break; |
1067 | case EXC_BREAKPOINT: | |
1068 | /* Many internal GDB routines expect breakpoints to be reported | |
4e225075 | 1069 | as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT |
0963b4bd | 1070 | as a spurious signal. */ |
a493e3e2 | 1071 | status->value.sig = GDB_SIGNAL_TRAP; |
a80b95ba TG |
1072 | break; |
1073 | default: | |
a493e3e2 | 1074 | status->value.sig = GDB_SIGNAL_UNKNOWN; |
a80b95ba TG |
1075 | break; |
1076 | } | |
1077 | ||
bb00b29d TG |
1078 | return ptid_build (inf->pid, 0, thread->gdb_port); |
1079 | } | |
a41f2563 | 1080 | else if (hdr->msgh_id == 0x48) |
bb00b29d | 1081 | { |
a41f2563 | 1082 | /* MACH_NOTIFY_DEAD_NAME: notification for exit. */ |
82b19a4d TG |
1083 | int res; |
1084 | ||
1085 | res = darwin_decode_notify_message (hdr, &inf); | |
1086 | ||
1087 | if (res < 0) | |
1088 | { | |
1089 | /* Should not happen... */ | |
1090 | printf_unfiltered | |
1091 | (_("darwin_wait: ill-formatted message (id=0x%x, res=%d)\n"), | |
1092 | hdr->msgh_id, res); | |
1093 | } | |
1094 | ||
a41f2563 TG |
1095 | *pinf = NULL; |
1096 | *pthread = NULL; | |
bb00b29d | 1097 | |
82b19a4d TG |
1098 | if (res < 0 || inf == NULL) |
1099 | { | |
1100 | status->kind = TARGET_WAITKIND_IGNORE; | |
1101 | return minus_one_ptid; | |
1102 | } | |
1103 | ||
a41f2563 TG |
1104 | if (inf != NULL) |
1105 | { | |
089354bb SM |
1106 | darwin_inferior *priv = get_darwin_inferior (inf); |
1107 | ||
1108 | if (!priv->no_ptrace) | |
bb00b29d | 1109 | { |
a41f2563 TG |
1110 | pid_t res; |
1111 | int wstatus; | |
1112 | ||
1113 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
1114 | if (res < 0 || res != inf->pid) | |
1115 | { | |
1116 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
1117 | res, safe_strerror (errno)); | |
1118 | status->kind = TARGET_WAITKIND_IGNORE; | |
1119 | return minus_one_ptid; | |
1120 | } | |
1121 | if (WIFEXITED (wstatus)) | |
1122 | { | |
1123 | status->kind = TARGET_WAITKIND_EXITED; | |
1124 | status->value.integer = WEXITSTATUS (wstatus); | |
1125 | } | |
1126 | else | |
1127 | { | |
1128 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
5ae00552 | 1129 | status->value.sig = gdb_signal_from_host (WTERMSIG (wstatus)); |
a41f2563 TG |
1130 | } |
1131 | ||
1132 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"), | |
1133 | res, wstatus); | |
1134 | ||
1135 | /* Looks necessary on Leopard and harmless... */ | |
1136 | wait4 (inf->pid, &wstatus, 0, NULL); | |
1137 | ||
82b19a4d TG |
1138 | inferior_ptid = ptid_build (inf->pid, 0, 0); |
1139 | return inferior_ptid; | |
bb00b29d TG |
1140 | } |
1141 | else | |
1142 | { | |
a41f2563 TG |
1143 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
1144 | status->kind = TARGET_WAITKIND_EXITED; | |
1145 | status->value.integer = 0; /* Don't know. */ | |
1146 | return ptid_build (inf->pid, 0, 0); | |
bb00b29d | 1147 | } |
bb00b29d TG |
1148 | } |
1149 | } | |
1150 | ||
a41f2563 | 1151 | /* Unknown message. */ |
86ad98c3 | 1152 | warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id); |
a41f2563 | 1153 | status->kind = TARGET_WAITKIND_IGNORE; |
bb00b29d TG |
1154 | return minus_one_ptid; |
1155 | } | |
1156 | ||
1157 | static int | |
1158 | cancel_breakpoint (ptid_t ptid) | |
1159 | { | |
0963b4bd | 1160 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1161 | the current event, eventually we will resume this thread, and this |
1162 | breakpoint will trap again. | |
1163 | ||
1164 | If we do not do this, then we run the risk that the user will | |
1165 | delete or disable the breakpoint, but the thread will have already | |
1166 | tripped on it. */ | |
1167 | ||
1168 | struct regcache *regcache = get_thread_regcache (ptid); | |
ac7936df | 1169 | struct gdbarch *gdbarch = regcache->arch (); |
bb00b29d | 1170 | CORE_ADDR pc; |
a80b95ba | 1171 | |
527a273a | 1172 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
a01bda52 | 1173 | if (breakpoint_inserted_here_p (regcache->aspace (), pc)) |
bb00b29d | 1174 | { |
3eb831e0 TG |
1175 | inferior_debug (4, "cancel_breakpoint for thread 0x%lx\n", |
1176 | (unsigned long) ptid_get_tid (ptid)); | |
bb00b29d TG |
1177 | |
1178 | /* Back up the PC if necessary. */ | |
527a273a | 1179 | if (gdbarch_decr_pc_after_break (gdbarch)) |
bb00b29d TG |
1180 | regcache_write_pc (regcache, pc); |
1181 | ||
1182 | return 1; | |
a80b95ba | 1183 | } |
bb00b29d TG |
1184 | return 0; |
1185 | } | |
1186 | ||
1187 | static ptid_t | |
1188 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1189 | { | |
1190 | kern_return_t kret; | |
1191 | union | |
1192 | { | |
1193 | mach_msg_header_t hdr; | |
1194 | char data[0x100]; | |
1195 | } msgin; | |
1196 | mach_msg_header_t *hdr = &msgin.hdr; | |
1197 | ptid_t res; | |
1198 | darwin_thread_t *thread; | |
1199 | struct inferior *inf; | |
1200 | ||
1201 | inferior_debug | |
1202 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
1203 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
1204 | ||
1205 | /* Handle fake stop events at first. */ | |
1206 | if (darwin_inf_fake_stop != NULL) | |
1207 | { | |
1208 | inf = darwin_inf_fake_stop; | |
1209 | darwin_inf_fake_stop = NULL; | |
1210 | ||
089354bb SM |
1211 | darwin_inferior *priv = get_darwin_inferior (inf); |
1212 | ||
bb00b29d | 1213 | status->kind = TARGET_WAITKIND_STOPPED; |
a493e3e2 | 1214 | status->value.sig = GDB_SIGNAL_TRAP; |
089354bb | 1215 | thread = priv->threads[0]; |
bb00b29d TG |
1216 | thread->msg_state = DARWIN_STOPPED; |
1217 | return ptid_build (inf->pid, 0, thread->gdb_port); | |
1218 | } | |
1219 | ||
1220 | do | |
1221 | { | |
1222 | /* set_sigint_trap (); */ | |
1223 | ||
1224 | /* Wait for a message. */ | |
1225 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1226 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1227 | ||
1228 | /* clear_sigint_trap (); */ | |
1229 | ||
1230 | if (kret == MACH_RCV_INTERRUPTED) | |
1231 | { | |
1232 | status->kind = TARGET_WAITKIND_IGNORE; | |
1233 | return minus_one_ptid; | |
1234 | } | |
1235 | ||
1236 | if (kret != MACH_MSG_SUCCESS) | |
1237 | { | |
c8c9911f | 1238 | inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret); |
bb00b29d TG |
1239 | status->kind = TARGET_WAITKIND_SPURIOUS; |
1240 | return minus_one_ptid; | |
1241 | } | |
1242 | ||
1243 | /* Debug: display message. */ | |
1244 | if (darwin_debug_flag > 10) | |
1245 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1246 | ||
1247 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
a41f2563 TG |
1248 | if (ptid_equal (res, minus_one_ptid)) |
1249 | continue; | |
bb00b29d | 1250 | |
a41f2563 | 1251 | /* Early return in case an inferior has exited. */ |
bb00b29d TG |
1252 | if (inf == NULL) |
1253 | return res; | |
1254 | } | |
1255 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1256 | ||
1257 | /* Stop all tasks. */ | |
1258 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1259 | ||
1260 | /* Read pending messages. */ | |
1261 | while (1) | |
a80b95ba | 1262 | { |
bb00b29d TG |
1263 | struct target_waitstatus status2; |
1264 | ptid_t ptid2; | |
1265 | ||
1266 | kret = mach_msg (&msgin.hdr, | |
1267 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1268 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1269 | ||
1270 | if (kret == MACH_RCV_TIMED_OUT) | |
1271 | break; | |
1272 | if (kret != MACH_MSG_SUCCESS) | |
1273 | { | |
1274 | inferior_debug | |
c8c9911f | 1275 | (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret); |
bb00b29d TG |
1276 | break; |
1277 | } | |
1278 | ||
a41f2563 TG |
1279 | /* Debug: display message. */ |
1280 | if (darwin_debug_flag > 10) | |
1281 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1282 | ||
bb00b29d | 1283 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); |
a80b95ba | 1284 | |
bb00b29d TG |
1285 | if (inf != NULL && thread != NULL |
1286 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1287 | { |
bb00b29d TG |
1288 | if (thread->single_step |
1289 | || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port))) | |
1290 | { | |
1291 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1292 | darwin_send_reply (inf, thread); | |
1293 | thread->msg_state = DARWIN_RUNNING; | |
1294 | } | |
1295 | else | |
1296 | inferior_debug | |
c8c9911f | 1297 | (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"), |
bb00b29d | 1298 | thread->gdb_port); |
a80b95ba | 1299 | } |
bb00b29d TG |
1300 | else |
1301 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1302 | } | |
1303 | return res; | |
1304 | } | |
a80b95ba | 1305 | |
f6ac5f3d PA |
1306 | ptid_t |
1307 | darwin_nat_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
1308 | int options) | |
bb00b29d TG |
1309 | { |
1310 | return darwin_wait (ptid, status); | |
1311 | } | |
a80b95ba | 1312 | |
f6ac5f3d PA |
1313 | void |
1314 | darwin_nat_target::interrupt () | |
bb00b29d TG |
1315 | { |
1316 | struct inferior *inf = current_inferior (); | |
089354bb | 1317 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1318 | |
bb00b29d | 1319 | /* FIXME: handle in no_ptrace mode. */ |
089354bb | 1320 | gdb_assert (!priv->no_ptrace); |
f6ac5f3d | 1321 | ::kill (inf->pid, SIGINT); |
a80b95ba TG |
1322 | } |
1323 | ||
82b19a4d TG |
1324 | /* Deallocate threads port and vector. */ |
1325 | ||
a80b95ba | 1326 | static void |
82b19a4d | 1327 | darwin_deallocate_threads (struct inferior *inf) |
a80b95ba | 1328 | { |
089354bb SM |
1329 | darwin_inferior *priv = get_darwin_inferior (inf); |
1330 | ||
1331 | for (darwin_thread_t *t : priv->threads) | |
a80b95ba | 1332 | { |
089354bb SM |
1333 | kern_return_t kret = mach_port_deallocate (gdb_task, t->gdb_port); |
1334 | MACH_CHECK_ERROR (kret); | |
a80b95ba | 1335 | } |
089354bb SM |
1336 | |
1337 | priv->threads.clear (); | |
82b19a4d | 1338 | } |
a80b95ba | 1339 | |
f6ac5f3d PA |
1340 | void |
1341 | darwin_nat_target::mourn_inferior () | |
82b19a4d TG |
1342 | { |
1343 | struct inferior *inf = current_inferior (); | |
089354bb | 1344 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1345 | kern_return_t kret; |
1346 | mach_port_t prev; | |
1347 | int i; | |
1348 | ||
1349 | /* Deallocate threads. */ | |
1350 | darwin_deallocate_threads (inf); | |
1351 | ||
1352 | /* Remove notify_port from darwin_port_set. */ | |
bb00b29d | 1353 | kret = mach_port_move_member (gdb_task, |
089354bb | 1354 | priv->notify_port, MACH_PORT_NULL); |
fda184b6 | 1355 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1356 | |
82b19a4d | 1357 | /* Remove task port dead_name notification. */ |
089354bb | 1358 | kret = mach_port_request_notification (gdb_task, priv->task, |
a80b95ba | 1359 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1360 | MACH_PORT_NULL, |
a80b95ba TG |
1361 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1362 | &prev); | |
1363 | /* This can fail if the task is dead. */ | |
c8c9911f | 1364 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
089354bb | 1365 | priv->task, prev, priv->notify_port); |
bb00b29d | 1366 | |
a80b95ba TG |
1367 | if (kret == KERN_SUCCESS) |
1368 | { | |
1369 | kret = mach_port_deallocate (gdb_task, prev); | |
1370 | MACH_CHECK_ERROR (kret); | |
1371 | } | |
1372 | ||
82b19a4d | 1373 | /* Destroy notify_port. */ |
089354bb | 1374 | kret = mach_port_destroy (gdb_task, priv->notify_port); |
bb00b29d TG |
1375 | MACH_CHECK_ERROR (kret); |
1376 | ||
a80b95ba | 1377 | /* Deallocate saved exception ports. */ |
089354bb | 1378 | darwin_deallocate_exception_ports (priv); |
a80b95ba | 1379 | |
82b19a4d | 1380 | /* Deallocate task port. */ |
089354bb | 1381 | kret = mach_port_deallocate (gdb_task, priv->task); |
a80b95ba TG |
1382 | MACH_CHECK_ERROR (kret); |
1383 | ||
fe978cb0 | 1384 | inf->priv = NULL; |
a80b95ba | 1385 | |
f6ac5f3d | 1386 | inf_child_target::mourn_inferior (); |
a80b95ba TG |
1387 | } |
1388 | ||
1389 | static void | |
bb00b29d | 1390 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1391 | { |
089354bb | 1392 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1393 | |
089354bb | 1394 | for (darwin_thread_t *t : priv->threads) |
bb00b29d TG |
1395 | { |
1396 | if (t->msg_state == DARWIN_MESSAGE) | |
1397 | darwin_resume_thread (inf, t, 0, 0); | |
1398 | } | |
a80b95ba TG |
1399 | } |
1400 | ||
1401 | static void | |
bb00b29d | 1402 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1403 | { |
1404 | struct target_waitstatus wstatus; | |
1405 | ptid_t ptid; | |
1406 | kern_return_t kret; | |
1407 | int status; | |
1408 | int res; | |
089354bb | 1409 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1410 | |
bb00b29d | 1411 | gdb_assert (inf != NULL); |
a80b95ba | 1412 | |
bb00b29d | 1413 | darwin_suspend_inferior (inf); |
a80b95ba | 1414 | |
bb00b29d | 1415 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1416 | |
089354bb | 1417 | if (priv->no_ptrace) |
bb00b29d | 1418 | return; |
a80b95ba | 1419 | |
bb00b29d TG |
1420 | res = kill (inf->pid, SIGSTOP); |
1421 | if (res != 0) | |
b37520b6 | 1422 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1423 | |
bb00b29d TG |
1424 | /* Wait until the process is really stopped. */ |
1425 | while (1) | |
a80b95ba | 1426 | { |
bb00b29d TG |
1427 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1428 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 1429 | && wstatus.value.sig == GDB_SIGNAL_STOP) |
bb00b29d | 1430 | break; |
a80b95ba TG |
1431 | } |
1432 | } | |
1433 | ||
1434 | static kern_return_t | |
1435 | darwin_save_exception_ports (darwin_inferior *inf) | |
1436 | { | |
1437 | kern_return_t kret; | |
1438 | ||
1439 | inf->exception_info.count = | |
1440 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1441 | ||
1442 | kret = task_get_exception_ports | |
1443 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1444 | &inf->exception_info.count, inf->exception_info.ports, | |
1445 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1446 | return kret; | |
1447 | } | |
1448 | ||
1449 | static kern_return_t | |
1450 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1451 | { | |
1452 | int i; | |
1453 | kern_return_t kret; | |
1454 | ||
1455 | for (i = 0; i < inf->exception_info.count; i++) | |
1456 | { | |
1457 | kret = task_set_exception_ports | |
1458 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1459 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1460 | if (kret != KERN_SUCCESS) | |
1461 | return kret; | |
1462 | } | |
1463 | ||
1464 | return KERN_SUCCESS; | |
1465 | } | |
1466 | ||
82b19a4d TG |
1467 | /* Deallocate saved exception ports. */ |
1468 | ||
1469 | static void | |
1470 | darwin_deallocate_exception_ports (darwin_inferior *inf) | |
1471 | { | |
1472 | int i; | |
1473 | kern_return_t kret; | |
1474 | ||
1475 | for (i = 0; i < inf->exception_info.count; i++) | |
1476 | { | |
1477 | kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]); | |
1478 | MACH_CHECK_ERROR (kret); | |
1479 | } | |
1480 | inf->exception_info.count = 0; | |
1481 | } | |
1482 | ||
1483 | static void | |
1484 | darwin_setup_exceptions (struct inferior *inf) | |
1485 | { | |
089354bb | 1486 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1487 | kern_return_t kret; |
1488 | int traps_expected; | |
1489 | exception_mask_t mask; | |
1490 | ||
089354bb | 1491 | kret = darwin_save_exception_ports (priv); |
82b19a4d TG |
1492 | if (kret != KERN_SUCCESS) |
1493 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1494 | "returned: %d"), | |
1495 | kret); | |
1496 | ||
1497 | /* Set exception port. */ | |
1498 | if (enable_mach_exceptions) | |
1499 | mask = EXC_MASK_ALL; | |
1500 | else | |
1501 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
089354bb | 1502 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
82b19a4d TG |
1503 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
1504 | if (kret != KERN_SUCCESS) | |
1505 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1506 | "returned: %d"), | |
1507 | kret); | |
1508 | } | |
1509 | ||
f6ac5f3d PA |
1510 | void |
1511 | darwin_nat_target::kill () | |
bb00b29d TG |
1512 | { |
1513 | struct inferior *inf = current_inferior (); | |
089354bb | 1514 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
1515 | struct target_waitstatus wstatus; |
1516 | ptid_t ptid; | |
1517 | kern_return_t kret; | |
1518 | int status; | |
1519 | int res; | |
1520 | ||
1521 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1522 | return; | |
1523 | ||
1524 | gdb_assert (inf != NULL); | |
1525 | ||
089354bb | 1526 | kret = darwin_restore_exception_ports (priv); |
ee41036f | 1527 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1528 | |
ee41036f | 1529 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1530 | |
f6ac5f3d | 1531 | res = ::kill (inf->pid, 9); |
bb00b29d | 1532 | |
ee41036f | 1533 | if (res == 0) |
bb00b29d | 1534 | { |
bb00b29d | 1535 | darwin_resume_inferior (inf); |
a6290449 | 1536 | |
bb00b29d TG |
1537 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1538 | } | |
ee41036f TG |
1539 | else if (errno != ESRCH) |
1540 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1541 | inf->pid, safe_strerror (errno)); | |
bb00b29d | 1542 | |
bc1e6c81 | 1543 | target_mourn_inferior (inferior_ptid); |
bb00b29d TG |
1544 | } |
1545 | ||
82b19a4d TG |
1546 | static void |
1547 | darwin_setup_request_notification (struct inferior *inf) | |
1548 | { | |
089354bb | 1549 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1550 | kern_return_t kret; |
1551 | mach_port_t prev_not; | |
1552 | ||
089354bb | 1553 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d | 1554 | MACH_NOTIFY_DEAD_NAME, 0, |
089354bb | 1555 | priv->notify_port, |
82b19a4d TG |
1556 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1557 | &prev_not); | |
1558 | if (kret != KERN_SUCCESS) | |
1559 | error (_("Termination notification request failed, " | |
1560 | "mach_port_request_notification\n" | |
1561 | "returned: %d"), | |
1562 | kret); | |
1563 | if (prev_not != MACH_PORT_NULL) | |
1564 | { | |
1565 | /* This is unexpected, as there should not be any previously | |
1566 | registered notification request. But this is not a fatal | |
1567 | issue, so just emit a warning. */ | |
1568 | warning (_("\ | |
1569 | A task termination request was registered before the debugger registered\n\ | |
1570 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1571 | impact on the debugging session.")); | |
1572 | } | |
1573 | } | |
1574 | ||
bb00b29d TG |
1575 | static void |
1576 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1577 | { |
a80b95ba TG |
1578 | kern_return_t kret; |
1579 | mach_port_t prev_port; | |
1580 | int traps_expected; | |
bb00b29d | 1581 | mach_port_t prev_not; |
a80b95ba TG |
1582 | exception_mask_t mask; |
1583 | ||
089354bb SM |
1584 | darwin_inferior *priv = new darwin_inferior; |
1585 | inf->priv.reset (priv); | |
bb00b29d | 1586 | |
089354bb | 1587 | kret = task_for_pid (gdb_task, inf->pid, &priv->task); |
a80b95ba TG |
1588 | if (kret != KERN_SUCCESS) |
1589 | { | |
1590 | int status; | |
a80b95ba TG |
1591 | |
1592 | if (!inf->attach_flag) | |
1593 | { | |
bb00b29d TG |
1594 | kill (inf->pid, 9); |
1595 | waitpid (inf->pid, &status, 0); | |
a80b95ba TG |
1596 | } |
1597 | ||
1598 | error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
15c19d39 | 1599 | " (please check gdb is codesigned - see taskgated(8))"), |
bb00b29d | 1600 | inf->pid, mach_error_string (kret), (unsigned long) kret); |
a80b95ba TG |
1601 | } |
1602 | ||
bb00b29d | 1603 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
089354bb | 1604 | priv->task, inf->pid); |
a80b95ba TG |
1605 | |
1606 | if (darwin_ex_port == MACH_PORT_NULL) | |
1607 | { | |
1608 | /* Create a port to get exceptions. */ | |
1609 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1610 | &darwin_ex_port); | |
fda184b6 JB |
1611 | if (kret != KERN_SUCCESS) |
1612 | error (_("Unable to create exception port, mach_port_allocate " | |
1613 | "returned: %d"), | |
1614 | kret); | |
a80b95ba TG |
1615 | |
1616 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port, | |
1617 | MACH_MSG_TYPE_MAKE_SEND); | |
fda184b6 JB |
1618 | if (kret != KERN_SUCCESS) |
1619 | error (_("Unable to create exception port, mach_port_insert_right " | |
1620 | "returned: %d"), | |
1621 | kret); | |
a80b95ba TG |
1622 | |
1623 | /* Create a port set and put ex_port in it. */ | |
1624 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1625 | &darwin_port_set); | |
fda184b6 JB |
1626 | if (kret != KERN_SUCCESS) |
1627 | error (_("Unable to create port set, mach_port_allocate " | |
1628 | "returned: %d"), | |
1629 | kret); | |
a80b95ba TG |
1630 | |
1631 | kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set); | |
fda184b6 JB |
1632 | if (kret != KERN_SUCCESS) |
1633 | error (_("Unable to move exception port into new port set, " | |
1634 | "mach_port_move_member\n" | |
1635 | "returned: %d"), | |
1636 | kret); | |
bb00b29d | 1637 | } |
a80b95ba | 1638 | |
bb00b29d TG |
1639 | /* Create a port to be notified when the child task terminates. */ |
1640 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
089354bb | 1641 | &priv->notify_port); |
fda184b6 JB |
1642 | if (kret != KERN_SUCCESS) |
1643 | error (_("Unable to create notification port, mach_port_allocate " | |
1644 | "returned: %d"), | |
1645 | kret); | |
a80b95ba | 1646 | |
bb00b29d | 1647 | kret = mach_port_move_member (gdb_task, |
089354bb | 1648 | priv->notify_port, darwin_port_set); |
fda184b6 JB |
1649 | if (kret != KERN_SUCCESS) |
1650 | error (_("Unable to move notification port into new port set, " | |
1651 | "mach_port_move_member\n" | |
1652 | "returned: %d"), | |
1653 | kret); | |
a80b95ba | 1654 | |
82b19a4d | 1655 | darwin_setup_request_notification (inf); |
a80b95ba | 1656 | |
82b19a4d | 1657 | darwin_setup_exceptions (inf); |
a80b95ba | 1658 | |
6a3cb8e8 PA |
1659 | if (!target_is_pushed (darwin_ops)) |
1660 | push_target (darwin_ops); | |
a80b95ba TG |
1661 | } |
1662 | ||
7aabaf9d | 1663 | /* Get the thread_info object corresponding to this darwin_thread_info. */ |
db665f42 SM |
1664 | |
1665 | static struct thread_info * | |
7aabaf9d | 1666 | thread_info_from_private_thread_info (darwin_thread_info *pti) |
db665f42 SM |
1667 | { |
1668 | struct thread_info *it; | |
1669 | ||
1670 | ALL_THREADS (it) | |
1671 | { | |
7aabaf9d SM |
1672 | darwin_thread_info *iter_pti = get_darwin_thread_info (it); |
1673 | ||
1674 | if (iter_pti->gdb_port == pti->gdb_port) | |
db665f42 SM |
1675 | break; |
1676 | } | |
1677 | ||
1678 | gdb_assert (it != NULL); | |
1679 | ||
1680 | return it; | |
1681 | } | |
1682 | ||
a80b95ba | 1683 | static void |
bb00b29d | 1684 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1685 | { |
a80b95ba TG |
1686 | darwin_check_new_threads (inf); |
1687 | ||
089354bb | 1688 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 1689 | |
089354bb SM |
1690 | gdb_assert (!priv->threads.empty ()); |
1691 | ||
7aabaf9d | 1692 | darwin_thread_info *first_pti = priv->threads.front (); |
db665f42 SM |
1693 | struct thread_info *first_thread |
1694 | = thread_info_from_private_thread_info (first_pti); | |
1695 | ||
1696 | inferior_ptid = first_thread->ptid; | |
bb00b29d TG |
1697 | } |
1698 | ||
1699 | /* The child must synchronize with gdb: gdb must set the exception port | |
1700 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1701 | FIXME: is there a lighter way ? */ | |
1702 | static int ptrace_fds[2]; | |
1703 | ||
1704 | static void | |
1705 | darwin_ptrace_me (void) | |
1706 | { | |
1707 | int res; | |
1708 | char c; | |
1709 | ||
1710 | /* Close write end point. */ | |
0db8980c SDJ |
1711 | if (close (ptrace_fds[1]) < 0) |
1712 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1713 | |
1714 | /* Wait until gdb is ready. */ | |
1715 | res = read (ptrace_fds[0], &c, 1); | |
fda184b6 | 1716 | if (res != 0) |
0db8980c SDJ |
1717 | trace_start_error (_("unable to read from pipe, read returned: %d"), res); |
1718 | ||
1719 | if (close (ptrace_fds[0]) < 0) | |
1720 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1721 | |
1722 | /* Get rid of privileges. */ | |
0db8980c SDJ |
1723 | if (setegid (getgid ()) < 0) |
1724 | trace_start_error_with_name ("setegid"); | |
bb00b29d TG |
1725 | |
1726 | /* Set TRACEME. */ | |
0db8980c SDJ |
1727 | if (PTRACE (PT_TRACE_ME, 0, 0, 0) < 0) |
1728 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1729 | |
1730 | /* Redirect signals to exception port. */ | |
0db8980c SDJ |
1731 | if (PTRACE (PT_SIGEXC, 0, 0, 0) < 0) |
1732 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1733 | } |
1734 | ||
1735 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1736 | static void | |
1737 | darwin_pre_ptrace (void) | |
1738 | { | |
1739 | if (pipe (ptrace_fds) != 0) | |
1740 | { | |
1741 | ptrace_fds[0] = -1; | |
1742 | ptrace_fds[1] = -1; | |
1743 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1744 | } | |
21ff4686 TT |
1745 | |
1746 | mark_fd_no_cloexec (ptrace_fds[0]); | |
1747 | mark_fd_no_cloexec (ptrace_fds[1]); | |
a80b95ba TG |
1748 | } |
1749 | ||
1750 | static void | |
1751 | darwin_ptrace_him (int pid) | |
1752 | { | |
1753 | task_t itask; | |
1754 | kern_return_t kret; | |
1755 | mach_port_t prev_port; | |
1756 | int traps_expected; | |
bb00b29d | 1757 | struct inferior *inf = current_inferior (); |
a80b95ba | 1758 | |
bb00b29d | 1759 | darwin_attach_pid (inf); |
a80b95ba TG |
1760 | |
1761 | /* Let's the child run. */ | |
1762 | close (ptrace_fds[0]); | |
1763 | close (ptrace_fds[1]); | |
1764 | ||
21ff4686 TT |
1765 | unmark_fd_no_cloexec (ptrace_fds[0]); |
1766 | unmark_fd_no_cloexec (ptrace_fds[1]); | |
1767 | ||
bb00b29d TG |
1768 | darwin_init_thread_list (inf); |
1769 | ||
2090129c | 1770 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
a80b95ba TG |
1771 | } |
1772 | ||
e69860f1 TG |
1773 | static void |
1774 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1775 | { | |
1776 | posix_spawnattr_t attr; | |
1777 | short ps_flags = 0; | |
f00c55f8 | 1778 | int res; |
e69860f1 | 1779 | |
f00c55f8 TG |
1780 | res = posix_spawnattr_init (&attr); |
1781 | if (res != 0) | |
e69860f1 TG |
1782 | { |
1783 | fprintf_unfiltered | |
1784 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); | |
1785 | return; | |
1786 | } | |
1787 | ||
1788 | /* Do like execve: replace the image. */ | |
1789 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1790 | ||
1791 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1792 | kernel include files. */ | |
1793 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1794 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1795 | #endif | |
1796 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1797 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1798 | if (res != 0) | |
e69860f1 | 1799 | { |
f00c55f8 | 1800 | fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1801 | return; |
1802 | } | |
1803 | ||
1804 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1805 | } | |
1806 | ||
f6ac5f3d PA |
1807 | void |
1808 | darwin_nat_target::create_inferior (const char *exec_file, | |
1809 | const std::string &allargs, | |
1810 | char **env, int from_tty) | |
a80b95ba TG |
1811 | { |
1812 | /* Do the hard work. */ | |
db665f42 SM |
1813 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, |
1814 | darwin_ptrace_him, darwin_pre_ptrace, NULL, | |
1815 | darwin_execvp); | |
a80b95ba TG |
1816 | } |
1817 | \f | |
1818 | ||
726ce67c JB |
1819 | /* Set things up such that the next call to darwin_wait will immediately |
1820 | return a fake stop event for inferior INF. | |
1821 | ||
1822 | This assumes that the inferior's thread list has been initialized, | |
1823 | as it will suspend the inferior's first thread. */ | |
1824 | ||
1825 | static void | |
1826 | darwin_setup_fake_stop_event (struct inferior *inf) | |
1827 | { | |
089354bb | 1828 | darwin_inferior *priv = get_darwin_inferior (inf); |
726ce67c JB |
1829 | darwin_thread_t *thread; |
1830 | kern_return_t kret; | |
1831 | ||
1832 | gdb_assert (darwin_inf_fake_stop == NULL); | |
1833 | darwin_inf_fake_stop = inf; | |
1834 | ||
1835 | /* When detecting a fake pending stop event, darwin_wait returns | |
1836 | an event saying that the first thread is in a DARWIN_STOPPED | |
1837 | state. To make that accurate, we need to suspend that thread | |
1838 | as well. Otherwise, we'll try resuming it when resuming the | |
1839 | inferior, and get a warning because the thread's suspend count | |
1840 | is already zero, making the resume request useless. */ | |
089354bb | 1841 | thread = priv->threads[0]; |
726ce67c JB |
1842 | kret = thread_suspend (thread->gdb_port); |
1843 | MACH_CHECK_ERROR (kret); | |
1844 | } | |
1845 | ||
a80b95ba TG |
1846 | /* Attach to process PID, then initialize for debugging it |
1847 | and wait for the trace-trap that results from attaching. */ | |
f6ac5f3d PA |
1848 | void |
1849 | darwin_nat_target::attach (const char *args, int from_tty) | |
a80b95ba TG |
1850 | { |
1851 | pid_t pid; | |
1852 | pid_t pid2; | |
1853 | int wstatus; | |
1854 | int res; | |
1855 | struct inferior *inf; | |
bb00b29d | 1856 | kern_return_t kret; |
a80b95ba | 1857 | |
74164c56 | 1858 | pid = parse_pid_to_attach (args); |
a80b95ba | 1859 | |
74164c56 | 1860 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1861 | error (_("I refuse to debug myself!")); |
1862 | ||
1863 | if (from_tty) | |
bb00b29d TG |
1864 | { |
1865 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1866 | |
bb00b29d TG |
1867 | if (exec_file) |
1868 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
1869 | target_pid_to_str (pid_to_ptid (pid))); | |
1870 | else | |
1871 | printf_unfiltered (_("Attaching to %s\n"), | |
1872 | target_pid_to_str (pid_to_ptid (pid))); | |
1873 | ||
1874 | gdb_flush (gdb_stdout); | |
1875 | } | |
1876 | ||
f6ac5f3d | 1877 | if (pid == 0 || ::kill (pid, 0) < 0) |
bb00b29d TG |
1878 | error (_("Can't attach to process %d: %s (%d)"), |
1879 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1880 | |
bb00b29d | 1881 | inferior_ptid = pid_to_ptid (pid); |
6c95b8df PA |
1882 | inf = current_inferior (); |
1883 | inferior_appeared (inf, pid); | |
a80b95ba | 1884 | inf->attach_flag = 1; |
6c95b8df | 1885 | |
bb00b29d | 1886 | darwin_attach_pid (inf); |
a80b95ba | 1887 | |
bb00b29d | 1888 | darwin_suspend_inferior (inf); |
a80b95ba | 1889 | |
bb00b29d | 1890 | darwin_init_thread_list (inf); |
a80b95ba | 1891 | |
089354bb SM |
1892 | darwin_inferior *priv = get_darwin_inferior (inf); |
1893 | ||
1894 | darwin_check_osabi (priv, ptid_get_tid (inferior_ptid)); | |
a80b95ba | 1895 | |
726ce67c JB |
1896 | darwin_setup_fake_stop_event (inf); |
1897 | ||
089354bb | 1898 | priv->no_ptrace = 1; |
a80b95ba TG |
1899 | } |
1900 | ||
1901 | /* Take a program previously attached to and detaches it. | |
1902 | The program resumes execution and will no longer stop | |
1903 | on signals, etc. We'd better not have left any breakpoints | |
1904 | in the program or it'll die when it hits one. For this | |
1905 | to work, it may be necessary for the process to have been | |
1906 | previously attached. It *might* work if the program was | |
1907 | started via fork. */ | |
f6ac5f3d PA |
1908 | |
1909 | void | |
1910 | darwin_nat_target::detach (inferior *inf, int from_tty) | |
a80b95ba | 1911 | { |
bb00b29d | 1912 | pid_t pid = ptid_get_pid (inferior_ptid); |
089354bb | 1913 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
1914 | kern_return_t kret; |
1915 | int res; | |
1916 | ||
bb00b29d | 1917 | /* Display message. */ |
0f48b757 | 1918 | target_announce_detach (from_tty); |
a80b95ba | 1919 | |
bb00b29d | 1920 | /* If ptrace() is in use, stop the process. */ |
089354bb | 1921 | if (!priv->no_ptrace) |
bb00b29d | 1922 | darwin_stop_inferior (inf); |
a80b95ba | 1923 | |
089354bb | 1924 | kret = darwin_restore_exception_ports (priv); |
a80b95ba TG |
1925 | MACH_CHECK_ERROR (kret); |
1926 | ||
089354bb | 1927 | if (!priv->no_ptrace) |
a80b95ba | 1928 | { |
bb00b29d TG |
1929 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1930 | if (res != 0) | |
1931 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1932 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1933 | } |
1934 | ||
bb00b29d | 1935 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1936 | |
5e9bc145 JB |
1937 | /* When using ptrace, we have just performed a PT_DETACH, which |
1938 | resumes the inferior. On the other hand, when we are not using | |
1939 | ptrace, we need to resume its execution ourselves. */ | |
089354bb | 1940 | if (priv->no_ptrace) |
5e9bc145 | 1941 | darwin_resume_inferior (inf); |
a80b95ba | 1942 | |
f6ac5f3d | 1943 | mourn_inferior (); |
a80b95ba TG |
1944 | } |
1945 | ||
f6ac5f3d PA |
1946 | const char * |
1947 | darwin_nat_target::pid_to_str (ptid_t ptid) | |
a80b95ba | 1948 | { |
bb00b29d TG |
1949 | static char buf[80]; |
1950 | long tid = ptid_get_tid (ptid); | |
1951 | ||
1952 | if (tid != 0) | |
1953 | { | |
1954 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
1955 | tid, ptid_get_pid (ptid)); | |
1956 | return buf; | |
1957 | } | |
a80b95ba | 1958 | |
bb00b29d | 1959 | return normal_pid_to_str (ptid); |
a80b95ba TG |
1960 | } |
1961 | ||
57810aa7 | 1962 | bool |
f6ac5f3d | 1963 | darwin_nat_target::thread_alive (ptid_t ptid) |
a80b95ba | 1964 | { |
57810aa7 | 1965 | return true; |
a80b95ba TG |
1966 | } |
1967 | ||
1968 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
1969 | copy it to RDADDR in gdb's address space. | |
1970 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
1971 | to ADDR in inferior task's address space. | |
f00c55f8 | 1972 | Return 0 on failure; number of bytes read / writen otherwise. */ |
3eb831e0 | 1973 | |
a80b95ba TG |
1974 | static int |
1975 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 1976 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 1977 | ULONGEST length) |
a80b95ba | 1978 | { |
bb00b29d | 1979 | kern_return_t kret; |
3eb831e0 | 1980 | mach_vm_size_t res_length = 0; |
a80b95ba | 1981 | pointer_t copied; |
b9dd1947 | 1982 | mach_msg_type_number_t copy_count; |
a80b95ba TG |
1983 | mach_vm_size_t remaining_length; |
1984 | mach_vm_address_t region_address; | |
1985 | mach_vm_size_t region_length; | |
1986 | ||
b55e14c7 YQ |
1987 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
1988 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 1989 | |
3eb831e0 TG |
1990 | /* First read. */ |
1991 | if (rdaddr != NULL) | |
a80b95ba | 1992 | { |
3eb831e0 | 1993 | mach_vm_size_t count; |
a80b95ba | 1994 | |
3eb831e0 TG |
1995 | /* According to target.h(to_xfer_partial), one and only one may be |
1996 | non-null. */ | |
1997 | gdb_assert (wraddr == NULL); | |
a80b95ba | 1998 | |
3eb831e0 TG |
1999 | kret = mach_vm_read_overwrite (task, addr, length, |
2000 | (mach_vm_address_t) rdaddr, &count); | |
2001 | if (kret != KERN_SUCCESS) | |
2002 | { | |
2003 | inferior_debug | |
2004 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
2005 | core_addr_to_string (addr), mach_error_string (kret)); | |
2006 | return 0; | |
2007 | } | |
2008 | return count; | |
2009 | } | |
a80b95ba | 2010 | |
3eb831e0 TG |
2011 | /* See above. */ |
2012 | gdb_assert (wraddr != NULL); | |
a80b95ba | 2013 | |
3eb831e0 | 2014 | while (length != 0) |
a80b95ba | 2015 | { |
3eb831e0 TG |
2016 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
2017 | mach_vm_address_t region_address = (mach_vm_address_t) (addr - offset); | |
2018 | mach_vm_size_t aligned_length = | |
2019 | (mach_vm_size_t) PAGE_ROUND (offset + length); | |
bb00b29d | 2020 | vm_region_submap_short_info_data_64_t info; |
3eb831e0 TG |
2021 | mach_msg_type_number_t count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; |
2022 | natural_t region_depth = 1000; | |
bb00b29d | 2023 | mach_vm_address_t region_start = region_address; |
3eb831e0 TG |
2024 | mach_vm_size_t region_length; |
2025 | mach_vm_size_t write_length; | |
bb00b29d | 2026 | |
3eb831e0 | 2027 | /* Read page protection. */ |
bb00b29d TG |
2028 | kret = mach_vm_region_recurse |
2029 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
2030 | (vm_region_recurse_info_t) &info, &count); | |
2031 | ||
2032 | if (kret != KERN_SUCCESS) | |
a80b95ba | 2033 | { |
bb00b29d TG |
2034 | inferior_debug (1, _("darwin_read_write_inferior: " |
2035 | "mach_vm_region_recurse failed at %s: %s\n"), | |
2036 | core_addr_to_string (region_address), | |
2037 | mach_error_string (kret)); | |
3eb831e0 | 2038 | return res_length; |
a80b95ba TG |
2039 | } |
2040 | ||
bb00b29d TG |
2041 | inferior_debug |
2042 | (9, _("darwin_read_write_inferior: " | |
2043 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
2044 | core_addr_to_string (region_address), | |
2045 | core_addr_to_string (region_start), | |
2046 | core_addr_to_string (region_length)); | |
2047 | ||
0963b4bd | 2048 | /* Check for holes in memory. */ |
bb00b29d | 2049 | if (region_start > region_address) |
a80b95ba | 2050 | { |
0963b4bd | 2051 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 2052 | core_addr_to_string (region_address), |
bb00b29d | 2053 | core_addr_to_string (region_start), |
a80b95ba | 2054 | (unsigned)region_length); |
3eb831e0 | 2055 | return res_length; |
a80b95ba TG |
2056 | } |
2057 | ||
bb00b29d TG |
2058 | /* Adjust the length. */ |
2059 | region_length -= (region_address - region_start); | |
3eb831e0 TG |
2060 | if (region_length > aligned_length) |
2061 | region_length = aligned_length; | |
bb00b29d | 2062 | |
3eb831e0 TG |
2063 | /* Make the pages RW. */ |
2064 | if (!(info.protection & VM_PROT_WRITE)) | |
a80b95ba | 2065 | { |
3eb831e0 TG |
2066 | vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE; |
2067 | ||
2068 | kret = mach_vm_protect (task, region_address, region_length, | |
2069 | FALSE, prot); | |
bb00b29d TG |
2070 | if (kret != KERN_SUCCESS) |
2071 | { | |
3eb831e0 TG |
2072 | prot |= VM_PROT_COPY; |
2073 | kret = mach_vm_protect (task, region_address, region_length, | |
2074 | FALSE, prot); | |
2075 | } | |
2076 | if (kret != KERN_SUCCESS) | |
2077 | { | |
2078 | warning (_("darwin_read_write_inferior: " | |
2079 | "mach_vm_protect failed at %s " | |
2080 | "(len=0x%lx, prot=0x%x): %s"), | |
bb00b29d | 2081 | core_addr_to_string (region_address), |
3eb831e0 | 2082 | (unsigned long) region_length, (unsigned) prot, |
bb00b29d | 2083 | mach_error_string (kret)); |
3eb831e0 | 2084 | return res_length; |
bb00b29d | 2085 | } |
a80b95ba TG |
2086 | } |
2087 | ||
3eb831e0 TG |
2088 | if (offset + length > region_length) |
2089 | write_length = region_length - offset; | |
2090 | else | |
2091 | write_length = length; | |
2092 | ||
2093 | /* Write. */ | |
2094 | kret = mach_vm_write (task, addr, (vm_offset_t) wraddr, write_length); | |
2095 | if (kret != KERN_SUCCESS) | |
2096 | { | |
2097 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
2098 | mach_error_string (kret)); | |
2099 | return res_length; | |
2100 | } | |
2101 | ||
2102 | /* Restore page rights. */ | |
a80b95ba TG |
2103 | if (!(info.protection & VM_PROT_WRITE)) |
2104 | { | |
bb00b29d | 2105 | kret = mach_vm_protect (task, region_address, region_length, |
3eb831e0 | 2106 | FALSE, info.protection); |
bb00b29d | 2107 | if (kret != KERN_SUCCESS) |
a80b95ba | 2108 | { |
3eb831e0 TG |
2109 | warning (_("darwin_read_write_inferior: " |
2110 | "mach_vm_protect restore failed at %s " | |
2111 | "(len=0x%lx): %s"), | |
bb00b29d | 2112 | core_addr_to_string (region_address), |
3eb831e0 TG |
2113 | (unsigned long) region_length, |
2114 | mach_error_string (kret)); | |
a80b95ba TG |
2115 | } |
2116 | } | |
a80b95ba | 2117 | |
3eb831e0 TG |
2118 | addr += write_length; |
2119 | wraddr += write_length; | |
2120 | res_length += write_length; | |
2121 | length -= write_length; | |
a80b95ba | 2122 | } |
3eb831e0 TG |
2123 | |
2124 | return res_length; | |
a80b95ba TG |
2125 | } |
2126 | ||
f00c55f8 | 2127 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
ad2073b0 | 2128 | to RDADDR (in big endian). |
569283d4 | 2129 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 2130 | |
b967eb24 | 2131 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 2132 | /* This is not available in Darwin 9. */ |
9b409511 | 2133 | static enum target_xfer_status |
b9dd1947 | 2134 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 2135 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
2136 | { |
2137 | struct task_dyld_info task_dyld_info; | |
2138 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
2139 | int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t); | |
2140 | kern_return_t kret; | |
2141 | ||
ad2073b0 | 2142 | if (addr != 0 || length > sizeof (mach_vm_address_t)) |
9b409511 | 2143 | return TARGET_XFER_EOF; |
f00c55f8 | 2144 | |
ad2073b0 TG |
2145 | kret = task_info (task, TASK_DYLD_INFO, |
2146 | (task_info_t) &task_dyld_info, &count); | |
f00c55f8 TG |
2147 | MACH_CHECK_ERROR (kret); |
2148 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 2149 | return TARGET_XFER_E_IO; |
ad2073b0 TG |
2150 | |
2151 | store_unsigned_integer (rdaddr, length, BFD_ENDIAN_BIG, | |
2152 | task_dyld_info.all_image_info_addr); | |
9b409511 YQ |
2153 | *xfered_len = (ULONGEST) length; |
2154 | return TARGET_XFER_OK; | |
f00c55f8 | 2155 | } |
569283d4 | 2156 | #endif |
f00c55f8 | 2157 | |
a80b95ba | 2158 | \f |
a80b95ba | 2159 | |
f6ac5f3d PA |
2160 | enum target_xfer_status |
2161 | darwin_nat_target::xfer_partial (enum target_object object, const char *annex, | |
2162 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
2163 | ULONGEST offset, ULONGEST len, | |
2164 | ULONGEST *xfered_len) | |
a80b95ba | 2165 | { |
bb00b29d | 2166 | struct inferior *inf = current_inferior (); |
089354bb | 2167 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2168 | |
2169 | inferior_debug | |
b55e14c7 YQ |
2170 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
2171 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
2172 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
2173 | inf->pid); | |
a80b95ba | 2174 | |
f00c55f8 TG |
2175 | switch (object) |
2176 | { | |
2177 | case TARGET_OBJECT_MEMORY: | |
9b409511 | 2178 | { |
089354bb | 2179 | int l = darwin_read_write_inferior (priv->task, offset, |
9b409511 YQ |
2180 | readbuf, writebuf, len); |
2181 | ||
2182 | if (l == 0) | |
2183 | return TARGET_XFER_EOF; | |
2184 | else | |
2185 | { | |
2186 | gdb_assert (l > 0); | |
2187 | *xfered_len = (ULONGEST) l; | |
2188 | return TARGET_XFER_OK; | |
2189 | } | |
2190 | } | |
569283d4 | 2191 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
2192 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
2193 | if (writebuf != NULL || readbuf == NULL) | |
2194 | { | |
2195 | /* Support only read. */ | |
2ed4b548 | 2196 | return TARGET_XFER_E_IO; |
f00c55f8 | 2197 | } |
089354bb | 2198 | return darwin_read_dyld_info (priv->task, offset, readbuf, len, |
9b409511 | 2199 | xfered_len); |
569283d4 | 2200 | #endif |
f00c55f8 | 2201 | default: |
2ed4b548 | 2202 | return TARGET_XFER_E_IO; |
f00c55f8 | 2203 | } |
a80b95ba | 2204 | |
a80b95ba TG |
2205 | } |
2206 | ||
2207 | static void | |
0fc76421 | 2208 | set_enable_mach_exceptions (const char *args, int from_tty, |
a80b95ba TG |
2209 | struct cmd_list_element *c) |
2210 | { | |
bb00b29d | 2211 | if (!ptid_equal (inferior_ptid, null_ptid)) |
a80b95ba | 2212 | { |
bb00b29d | 2213 | struct inferior *inf = current_inferior (); |
089354bb | 2214 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
2215 | exception_mask_t mask; |
2216 | kern_return_t kret; | |
2217 | ||
2218 | if (enable_mach_exceptions) | |
2219 | mask = EXC_MASK_ALL; | |
2220 | else | |
2221 | { | |
089354bb | 2222 | darwin_restore_exception_ports (priv); |
bb00b29d | 2223 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
a80b95ba | 2224 | } |
089354bb | 2225 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
a80b95ba TG |
2226 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2227 | MACH_CHECK_ERROR (kret); | |
2228 | } | |
2229 | } | |
2230 | ||
f6ac5f3d PA |
2231 | char * |
2232 | darwin_nat_target::pid_to_exec_file (int pid) | |
bb00b29d | 2233 | { |
b4ab256d | 2234 | static char path[PATH_MAX]; |
bb00b29d TG |
2235 | int res; |
2236 | ||
d8d2a3ee | 2237 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2238 | if (res >= 0) |
2239 | return path; | |
2240 | else | |
2241 | return NULL; | |
2242 | } | |
2243 | ||
f6ac5f3d PA |
2244 | ptid_t |
2245 | darwin_nat_target::get_ada_task_ptid (long lwp, long thread) | |
bb00b29d | 2246 | { |
bb00b29d | 2247 | struct inferior *inf = current_inferior (); |
089354bb | 2248 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2249 | kern_return_t kret; |
2250 | mach_port_name_array_t names; | |
2251 | mach_msg_type_number_t names_count; | |
2252 | mach_port_type_array_t types; | |
2253 | mach_msg_type_number_t types_count; | |
2254 | long res = 0; | |
2255 | ||
2256 | /* First linear search. */ | |
089354bb SM |
2257 | for (darwin_thread_t *t : priv->threads) |
2258 | { | |
2259 | if (t->inf_port == lwp) | |
2260 | return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port); | |
2261 | } | |
bb00b29d TG |
2262 | |
2263 | /* Maybe the port was never extract. Do it now. */ | |
2264 | ||
2265 | /* First get inferior port names. */ | |
089354bb | 2266 | kret = mach_port_names (priv->task, &names, &names_count, &types, |
bb00b29d TG |
2267 | &types_count); |
2268 | MACH_CHECK_ERROR (kret); | |
2269 | if (kret != KERN_SUCCESS) | |
2270 | return null_ptid; | |
2271 | ||
2272 | /* For each name, copy the right in the gdb space and then compare with | |
2273 | our view of the inferior threads. We don't forget to deallocate the | |
2274 | right. */ | |
089354bb | 2275 | for (int i = 0; i < names_count; i++) |
bb00b29d TG |
2276 | { |
2277 | mach_port_t local_name; | |
2278 | mach_msg_type_name_t local_type; | |
2279 | ||
2280 | /* We just need to know the corresponding name in gdb name space. | |
2281 | So extract and deallocate the right. */ | |
089354bb | 2282 | kret = mach_port_extract_right (priv->task, names[i], |
bb00b29d TG |
2283 | MACH_MSG_TYPE_COPY_SEND, |
2284 | &local_name, &local_type); | |
2285 | if (kret != KERN_SUCCESS) | |
2286 | continue; | |
2287 | mach_port_deallocate (gdb_task, local_name); | |
2288 | ||
089354bb SM |
2289 | for (darwin_thread_t *t : priv->threads) |
2290 | { | |
2291 | if (t->gdb_port == local_name) | |
2292 | { | |
2293 | t->inf_port = names[i]; | |
2294 | if (names[i] == lwp) | |
2295 | res = t->gdb_port; | |
2296 | } | |
2297 | } | |
bb00b29d TG |
2298 | } |
2299 | ||
2300 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2301 | names_count * sizeof (mach_port_t)); | |
2302 | ||
2303 | if (res) | |
2304 | return ptid_build (ptid_get_pid (inferior_ptid), 0, res); | |
2305 | else | |
2306 | return null_ptid; | |
2307 | } | |
2308 | ||
57810aa7 | 2309 | bool |
f6ac5f3d | 2310 | darwin_nat_target::supports_multi_process () |
bb00b29d | 2311 | { |
57810aa7 | 2312 | return true; |
bb00b29d TG |
2313 | } |
2314 | ||
a80b95ba | 2315 | void |
f6ac5f3d | 2316 | _initialize_darwin_nat () |
a80b95ba TG |
2317 | { |
2318 | kern_return_t kret; | |
2319 | ||
a80b95ba TG |
2320 | gdb_task = mach_task_self (); |
2321 | darwin_host_self = mach_host_self (); | |
2322 | ||
2323 | /* Read page size. */ | |
2324 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2325 | if (kret != KERN_SUCCESS) | |
2326 | { | |
2327 | mach_page_size = 0x1000; | |
2328 | MACH_CHECK_ERROR (kret); | |
2329 | } | |
2330 | ||
3eb831e0 TG |
2331 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), |
2332 | (unsigned long) mach_task_self (), getpid ()); | |
a80b95ba | 2333 | |
ccce17b0 YQ |
2334 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2335 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2336 | Set if printing inferior communication debugging statements."), _("\ |
2337 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2338 | NULL, NULL, |
2339 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2340 | |
2341 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2342 | &enable_mach_exceptions, _("\ | |
2343 | Set if mach exceptions are caught."), _("\ | |
2344 | Show if mach exceptions are caught."), _("\ | |
2345 | When this mode is on, all low level exceptions are reported before being\n\ | |
2346 | reported by the kernel."), | |
2347 | &set_enable_mach_exceptions, NULL, | |
2348 | &setlist, &showlist); | |
2349 | } |