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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 | /* Task identifier of gdb. */ |
101 | static task_t gdb_task; | |
102 | ||
103 | /* A copy of mach_host_self (). */ | |
104 | mach_port_t darwin_host_self; | |
105 | ||
106 | /* Exception port. */ | |
107 | mach_port_t darwin_ex_port; | |
108 | ||
a6290449 | 109 | /* Port set, to wait for answer on all ports. */ |
a80b95ba TG |
110 | mach_port_t darwin_port_set; |
111 | ||
0963b4bd | 112 | /* Page size. */ |
a80b95ba TG |
113 | static vm_size_t mach_page_size; |
114 | ||
115 | /* If Set, catch all mach exceptions (before they are converted to signals | |
116 | by the kernel). */ | |
117 | static int enable_mach_exceptions; | |
118 | ||
bb00b29d TG |
119 | /* Inferior that should report a fake stop event. */ |
120 | static struct inferior *darwin_inf_fake_stop; | |
121 | ||
a80b95ba TG |
122 | #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1)) |
123 | #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1) | |
124 | ||
bb00b29d | 125 | /* This controls output of inferior debugging. */ |
ccce17b0 | 126 | static unsigned int darwin_debug_flag = 0; |
a80b95ba | 127 | |
15c19d39 TG |
128 | /* Create a __TEXT __info_plist section in the executable so that gdb could |
129 | be signed. This is required to get an authorization for task_for_pid. | |
130 | ||
a6290449 TG |
131 | Once gdb is built, you must codesign it with any system-trusted signing |
132 | authority. See taskgated(8) for details. */ | |
15c19d39 TG |
133 | static const unsigned char info_plist[] |
134 | __attribute__ ((section ("__TEXT,__info_plist"),used)) = | |
135 | "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" | |
136 | "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\"" | |
137 | " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" | |
138 | "<plist version=\"1.0\">\n" | |
139 | "<dict>\n" | |
140 | " <key>CFBundleIdentifier</key>\n" | |
141 | " <string>org.gnu.gdb</string>\n" | |
142 | " <key>CFBundleName</key>\n" | |
143 | " <string>gdb</string>\n" | |
144 | " <key>CFBundleVersion</key>\n" | |
145 | " <string>1.0</string>\n" | |
146 | " <key>SecTaskAccess</key>\n" | |
147 | " <array>\n" | |
148 | " <string>allowed</string>\n" | |
149 | " <string>debug</string>\n" | |
150 | " </array>\n" | |
151 | "</dict>\n" | |
152 | "</plist>\n"; | |
153 | ||
77b64a49 PA |
154 | static void inferior_debug (int level, const char *fmt, ...) |
155 | ATTRIBUTE_PRINTF (2, 3); | |
156 | ||
a80b95ba TG |
157 | static void |
158 | inferior_debug (int level, const char *fmt, ...) | |
159 | { | |
160 | va_list ap; | |
161 | ||
162 | if (darwin_debug_flag < level) | |
163 | return; | |
164 | ||
165 | va_start (ap, fmt); | |
166 | printf_unfiltered (_("[%d inferior]: "), getpid ()); | |
167 | vprintf_unfiltered (fmt, ap); | |
168 | va_end (ap); | |
169 | } | |
170 | ||
171 | void | |
172 | mach_check_error (kern_return_t ret, const char *file, | |
173 | unsigned int line, const char *func) | |
174 | { | |
175 | if (ret == KERN_SUCCESS) | |
176 | return; | |
177 | if (func == NULL) | |
178 | func = _("[UNKNOWN]"); | |
bb00b29d | 179 | |
4f1cdeec | 180 | warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"), |
bb00b29d | 181 | file, line, func, mach_error_string (ret), (unsigned long) ret); |
a80b95ba TG |
182 | } |
183 | ||
184 | static const char * | |
185 | unparse_exception_type (unsigned int i) | |
186 | { | |
187 | static char unknown_exception_buf[32]; | |
188 | ||
189 | switch (i) | |
190 | { | |
191 | case EXC_BAD_ACCESS: | |
192 | return "EXC_BAD_ACCESS"; | |
193 | case EXC_BAD_INSTRUCTION: | |
194 | return "EXC_BAD_INSTRUCTION"; | |
195 | case EXC_ARITHMETIC: | |
196 | return "EXC_ARITHMETIC"; | |
197 | case EXC_EMULATION: | |
198 | return "EXC_EMULATION"; | |
199 | case EXC_SOFTWARE: | |
200 | return "EXC_SOFTWARE"; | |
201 | case EXC_BREAKPOINT: | |
202 | return "EXC_BREAKPOINT"; | |
203 | case EXC_SYSCALL: | |
204 | return "EXC_SYSCALL"; | |
205 | case EXC_MACH_SYSCALL: | |
206 | return "EXC_MACH_SYSCALL"; | |
207 | case EXC_RPC_ALERT: | |
208 | return "EXC_RPC_ALERT"; | |
209 | case EXC_CRASH: | |
210 | return "EXC_CRASH"; | |
211 | default: | |
212 | snprintf (unknown_exception_buf, 32, _("unknown (%d)"), i); | |
213 | return unknown_exception_buf; | |
214 | } | |
215 | } | |
216 | ||
a7aa0d73 JB |
217 | /* Set errno to zero, and then call ptrace with the given arguments. |
218 | If inferior debugging traces are on, then also print a debug | |
219 | trace. | |
220 | ||
221 | The returned value is the same as the value returned by ptrace, | |
222 | except in the case where that value is -1 but errno is zero. | |
223 | This case is documented to be a non-error situation, so we | |
224 | return zero in that case. */ | |
225 | ||
a80b95ba TG |
226 | static int |
227 | darwin_ptrace (const char *name, | |
aa14fb50 | 228 | int request, int pid, caddr_t arg3, int arg4) |
a80b95ba TG |
229 | { |
230 | int ret; | |
231 | ||
a7aa0d73 | 232 | errno = 0; |
aa14fb50 | 233 | ret = ptrace (request, pid, arg3, arg4); |
a7aa0d73 JB |
234 | if (ret == -1 && errno == 0) |
235 | ret = 0; | |
a80b95ba | 236 | |
3eb831e0 TG |
237 | inferior_debug (4, _("ptrace (%s, %d, 0x%lx, %d): %d (%s)\n"), |
238 | name, pid, (unsigned long) arg3, arg4, ret, | |
a3224241 | 239 | (ret != 0) ? safe_strerror (errno) : _("no error")); |
a80b95ba TG |
240 | return ret; |
241 | } | |
242 | ||
243 | static int | |
244 | cmp_thread_t (const void *l, const void *r) | |
245 | { | |
bb00b29d TG |
246 | thread_t tl = *(const thread_t *)l; |
247 | thread_t tr = *(const thread_t *)r; | |
248 | return (int)(tl - tr); | |
a80b95ba TG |
249 | } |
250 | ||
251 | static void | |
bb00b29d | 252 | darwin_check_new_threads (struct inferior *inf) |
a80b95ba TG |
253 | { |
254 | kern_return_t kret; | |
a80b95ba TG |
255 | thread_array_t thread_list; |
256 | unsigned int new_nbr; | |
257 | unsigned int old_nbr; | |
258 | unsigned int new_ix, old_ix; | |
089354bb SM |
259 | darwin_inferior *darwin_inf = get_darwin_inferior (inf); |
260 | std::vector<darwin_thread_t *> new_thread_vec; | |
a80b95ba TG |
261 | |
262 | /* Get list of threads. */ | |
bb00b29d | 263 | kret = task_threads (darwin_inf->task, &thread_list, &new_nbr); |
a80b95ba TG |
264 | MACH_CHECK_ERROR (kret); |
265 | if (kret != KERN_SUCCESS) | |
266 | return; | |
267 | ||
bb00b29d | 268 | /* Sort the list. */ |
a80b95ba TG |
269 | if (new_nbr > 1) |
270 | qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t); | |
271 | ||
089354bb | 272 | old_nbr = darwin_inf->threads.size (); |
a80b95ba | 273 | |
bb00b29d TG |
274 | /* Quick check for no changes. */ |
275 | if (old_nbr == new_nbr) | |
276 | { | |
089354bb SM |
277 | size_t i; |
278 | ||
bb00b29d | 279 | for (i = 0; i < new_nbr; i++) |
089354bb | 280 | if (thread_list[i] != darwin_inf->threads[i]->gdb_port) |
bb00b29d TG |
281 | break; |
282 | if (i == new_nbr) | |
283 | { | |
15a9128a TG |
284 | /* Deallocate ports. */ |
285 | for (i = 0; i < new_nbr; i++) | |
286 | { | |
287 | kret = mach_port_deallocate (mach_task_self (), thread_list[i]); | |
288 | MACH_CHECK_ERROR (kret); | |
289 | } | |
290 | ||
291 | /* Deallocate the buffer. */ | |
bb00b29d TG |
292 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
293 | new_nbr * sizeof (int)); | |
294 | MACH_CHECK_ERROR (kret); | |
15a9128a | 295 | |
bb00b29d TG |
296 | return; |
297 | } | |
298 | } | |
299 | ||
82b19a4d | 300 | /* Full handling: detect new threads, remove dead threads. */ |
089354bb SM |
301 | |
302 | new_thread_vec.reserve (new_nbr); | |
bb00b29d | 303 | |
a80b95ba TG |
304 | for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;) |
305 | { | |
089354bb SM |
306 | thread_t new_id = (new_ix < new_nbr) ? thread_list[new_ix] : THREAD_NULL; |
307 | darwin_thread_t *old | |
308 | = (old_ix < old_nbr) ? darwin_inf->threads[old_ix] : NULL; | |
309 | thread_t old_id = old != NULL ? old->gdb_port : THREAD_NULL; | |
bb00b29d TG |
310 | |
311 | inferior_debug | |
c8c9911f | 312 | (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"), |
bb00b29d | 313 | new_ix, new_nbr, old_ix, old_nbr, new_id, old_id); |
a80b95ba TG |
314 | |
315 | if (old_id == new_id) | |
316 | { | |
317 | /* Thread still exist. */ | |
089354bb | 318 | new_thread_vec.push_back (old); |
a80b95ba TG |
319 | new_ix++; |
320 | old_ix++; | |
321 | ||
15a9128a TG |
322 | /* Deallocate the port. */ |
323 | kret = mach_port_deallocate (gdb_task, new_id); | |
a80b95ba | 324 | MACH_CHECK_ERROR (kret); |
15a9128a | 325 | |
a80b95ba TG |
326 | continue; |
327 | } | |
bb00b29d TG |
328 | if (new_ix < new_nbr && new_id == MACH_PORT_DEAD) |
329 | { | |
330 | /* Ignore dead ports. | |
331 | In some weird cases, we might get dead ports. They should | |
332 | correspond to dead thread so they could safely be ignored. */ | |
333 | new_ix++; | |
334 | continue; | |
335 | } | |
336 | if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id)) | |
a80b95ba TG |
337 | { |
338 | /* A thread was created. */ | |
7aabaf9d | 339 | darwin_thread_info *pti = new darwin_thread_info; |
a80b95ba | 340 | |
bb00b29d TG |
341 | pti->gdb_port = new_id; |
342 | pti->msg_state = DARWIN_RUNNING; | |
343 | ||
db665f42 | 344 | /* Add the new thread. */ |
fd79271b | 345 | add_thread_with_info (ptid_t (inf->pid, 0, new_id), pti); |
089354bb | 346 | new_thread_vec.push_back (pti); |
a80b95ba TG |
347 | new_ix++; |
348 | continue; | |
349 | } | |
bb00b29d | 350 | if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id)) |
a80b95ba TG |
351 | { |
352 | /* A thread was removed. */ | |
b7a08269 | 353 | struct thread_info *thr |
fd79271b | 354 | = find_thread_ptid (ptid_t (inf->pid, 0, old_id)); |
b7a08269 | 355 | delete_thread (thr); |
a80b95ba TG |
356 | kret = mach_port_deallocate (gdb_task, old_id); |
357 | MACH_CHECK_ERROR (kret); | |
358 | old_ix++; | |
bb00b29d | 359 | continue; |
a80b95ba | 360 | } |
f3574227 | 361 | gdb_assert_not_reached ("unexpected thread case"); |
a80b95ba TG |
362 | } |
363 | ||
089354bb | 364 | darwin_inf->threads = std::move (new_thread_vec); |
a80b95ba | 365 | |
15a9128a | 366 | /* Deallocate the buffer. */ |
a80b95ba TG |
367 | kret = vm_deallocate (gdb_task, (vm_address_t) thread_list, |
368 | new_nbr * sizeof (int)); | |
369 | MACH_CHECK_ERROR (kret); | |
370 | } | |
371 | ||
bb00b29d TG |
372 | static int |
373 | find_inferior_task_it (struct inferior *inf, void *port_ptr) | |
a80b95ba | 374 | { |
089354bb SM |
375 | darwin_inferior *priv = get_darwin_inferior (inf); |
376 | ||
377 | return priv->task == *(task_t *)port_ptr; | |
bb00b29d | 378 | } |
a80b95ba | 379 | |
bb00b29d | 380 | static int |
82b19a4d | 381 | find_inferior_pid_it (struct inferior *inf, void *pid_ptr) |
bb00b29d | 382 | { |
82b19a4d | 383 | return inf->pid == *(int *)pid_ptr; |
a80b95ba TG |
384 | } |
385 | ||
bb00b29d TG |
386 | /* Return an inferior by task port. */ |
387 | static struct inferior * | |
388 | darwin_find_inferior_by_task (task_t port) | |
a80b95ba | 389 | { |
bb00b29d TG |
390 | return iterate_over_inferiors (&find_inferior_task_it, &port); |
391 | } | |
a80b95ba | 392 | |
82b19a4d | 393 | /* Return an inferior by pid port. */ |
bb00b29d | 394 | static struct inferior * |
82b19a4d | 395 | darwin_find_inferior_by_pid (int pid) |
bb00b29d | 396 | { |
82b19a4d | 397 | return iterate_over_inferiors (&find_inferior_pid_it, &pid); |
bb00b29d | 398 | } |
a80b95ba | 399 | |
bb00b29d TG |
400 | /* Return a thread by port. */ |
401 | static darwin_thread_t * | |
402 | darwin_find_thread (struct inferior *inf, thread_t thread) | |
403 | { | |
089354bb SM |
404 | darwin_inferior *priv = get_darwin_inferior (inf); |
405 | ||
406 | for (darwin_thread_t *t : priv->threads) | |
407 | { | |
408 | if (t->gdb_port == thread) | |
409 | return t; | |
410 | } | |
bb00b29d | 411 | |
bb00b29d TG |
412 | return NULL; |
413 | } | |
a80b95ba | 414 | |
bb00b29d | 415 | /* Suspend (ie stop) an inferior at Mach level. */ |
a80b95ba | 416 | |
bb00b29d TG |
417 | static void |
418 | darwin_suspend_inferior (struct inferior *inf) | |
419 | { | |
089354bb SM |
420 | darwin_inferior *priv = get_darwin_inferior (inf); |
421 | ||
422 | if (!priv->suspended) | |
a80b95ba | 423 | { |
bb00b29d | 424 | kern_return_t kret; |
a80b95ba | 425 | |
089354bb | 426 | kret = task_suspend (priv->task); |
bb00b29d | 427 | MACH_CHECK_ERROR (kret); |
a80b95ba | 428 | |
089354bb | 429 | priv->suspended = 1; |
bb00b29d TG |
430 | } |
431 | } | |
a80b95ba | 432 | |
bb00b29d | 433 | /* Resume an inferior at Mach level. */ |
a80b95ba | 434 | |
bb00b29d TG |
435 | static void |
436 | darwin_resume_inferior (struct inferior *inf) | |
437 | { | |
089354bb SM |
438 | darwin_inferior *priv = get_darwin_inferior (inf); |
439 | ||
440 | if (priv->suspended) | |
bb00b29d TG |
441 | { |
442 | kern_return_t kret; | |
a80b95ba | 443 | |
089354bb | 444 | kret = task_resume (priv->task); |
bb00b29d TG |
445 | MACH_CHECK_ERROR (kret); |
446 | ||
089354bb | 447 | priv->suspended = 0; |
a80b95ba TG |
448 | } |
449 | } | |
450 | ||
bb00b29d TG |
451 | /* Iterator functions. */ |
452 | ||
453 | static int | |
454 | darwin_suspend_inferior_it (struct inferior *inf, void *arg) | |
a80b95ba | 455 | { |
bb00b29d TG |
456 | darwin_suspend_inferior (inf); |
457 | darwin_check_new_threads (inf); | |
458 | return 0; | |
459 | } | |
460 | ||
461 | static int | |
462 | darwin_resume_inferior_it (struct inferior *inf, void *arg) | |
463 | { | |
464 | darwin_resume_inferior (inf); | |
465 | return 0; | |
a80b95ba TG |
466 | } |
467 | ||
bb00b29d TG |
468 | static void |
469 | darwin_dump_message (mach_msg_header_t *hdr, int disp_body) | |
470 | { | |
471 | printf_unfiltered (_("message header:\n")); | |
472 | printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits); | |
473 | printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size); | |
474 | printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port); | |
475 | printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port); | |
476 | printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved); | |
477 | printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id); | |
478 | ||
479 | if (disp_body) | |
480 | { | |
481 | const unsigned char *data; | |
a6290449 | 482 | const unsigned int *ldata; |
bb00b29d TG |
483 | int size; |
484 | int i; | |
485 | ||
486 | data = (unsigned char *)(hdr + 1); | |
487 | size = hdr->msgh_size - sizeof (mach_msg_header_t); | |
488 | ||
489 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
490 | { | |
491 | mach_msg_body_t *bod = (mach_msg_body_t*)data; | |
492 | mach_msg_port_descriptor_t *desc = | |
493 | (mach_msg_port_descriptor_t *)(bod + 1); | |
494 | int k; | |
495 | NDR_record_t *ndr; | |
496 | printf_unfiltered (_("body: descriptor_count=%u\n"), | |
497 | bod->msgh_descriptor_count); | |
498 | data += sizeof (mach_msg_body_t); | |
499 | size -= sizeof (mach_msg_body_t); | |
500 | for (k = 0; k < bod->msgh_descriptor_count; k++) | |
501 | switch (desc[k].type) | |
502 | { | |
503 | case MACH_MSG_PORT_DESCRIPTOR: | |
504 | printf_unfiltered | |
505 | (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"), | |
506 | k, desc[k].type, desc[k].name, desc[k].disposition); | |
507 | break; | |
508 | default: | |
509 | printf_unfiltered (_(" descr %d: type=%u\n"), | |
510 | k, desc[k].type); | |
511 | break; | |
512 | } | |
513 | data += bod->msgh_descriptor_count | |
514 | * sizeof (mach_msg_port_descriptor_t); | |
515 | size -= bod->msgh_descriptor_count | |
516 | * sizeof (mach_msg_port_descriptor_t); | |
517 | ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count); | |
518 | printf_unfiltered | |
519 | (_("NDR: mig=%02x if=%02x encod=%02x " | |
520 | "int=%02x char=%02x float=%02x\n"), | |
521 | ndr->mig_vers, ndr->if_vers, ndr->mig_encoding, | |
522 | ndr->int_rep, ndr->char_rep, ndr->float_rep); | |
523 | data += sizeof (NDR_record_t); | |
524 | size -= sizeof (NDR_record_t); | |
525 | } | |
526 | ||
527 | printf_unfiltered (_(" data:")); | |
a6290449 TG |
528 | ldata = (const unsigned int *)data; |
529 | for (i = 0; i < size / sizeof (unsigned int); i++) | |
530 | printf_unfiltered (" %08x", ldata[i]); | |
bb00b29d TG |
531 | printf_unfiltered (_("\n")); |
532 | } | |
533 | } | |
534 | ||
82b19a4d TG |
535 | /* Adjust inferior data when a new task was created. */ |
536 | ||
537 | static struct inferior * | |
538 | darwin_find_new_inferior (task_t task_port, thread_t thread_port) | |
539 | { | |
540 | int task_pid; | |
541 | struct inferior *inf; | |
542 | kern_return_t kret; | |
543 | mach_port_t prev; | |
544 | ||
545 | /* Find the corresponding pid. */ | |
546 | kret = pid_for_task (task_port, &task_pid); | |
547 | if (kret != KERN_SUCCESS) | |
548 | { | |
549 | MACH_CHECK_ERROR (kret); | |
550 | return NULL; | |
551 | } | |
552 | ||
553 | /* Find the inferior for this pid. */ | |
554 | inf = darwin_find_inferior_by_pid (task_pid); | |
555 | if (inf == NULL) | |
556 | return NULL; | |
557 | ||
089354bb SM |
558 | darwin_inferior *priv = get_darwin_inferior (inf); |
559 | ||
82b19a4d | 560 | /* Deallocate saved exception ports. */ |
089354bb | 561 | darwin_deallocate_exception_ports (priv); |
82b19a4d TG |
562 | |
563 | /* No need to remove dead_name notification, but still... */ | |
089354bb | 564 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d TG |
565 | MACH_NOTIFY_DEAD_NAME, 0, |
566 | MACH_PORT_NULL, | |
567 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
568 | &prev); | |
569 | if (kret != KERN_INVALID_ARGUMENT) | |
570 | MACH_CHECK_ERROR (kret); | |
571 | ||
572 | /* Replace old task port. */ | |
089354bb | 573 | kret = mach_port_deallocate (gdb_task, priv->task); |
82b19a4d | 574 | MACH_CHECK_ERROR (kret); |
089354bb | 575 | priv->task = task_port; |
82b19a4d TG |
576 | |
577 | darwin_setup_request_notification (inf); | |
578 | darwin_setup_exceptions (inf); | |
579 | ||
580 | return inf; | |
581 | } | |
582 | ||
583 | /* Check data representation. */ | |
584 | ||
585 | static int | |
586 | darwin_check_message_ndr (NDR_record_t *ndr) | |
587 | { | |
588 | if (ndr->mig_vers != NDR_PROTOCOL_2_0 | |
589 | || ndr->if_vers != NDR_PROTOCOL_2_0 | |
590 | || ndr->mig_encoding != NDR_record.mig_encoding | |
591 | || ndr->int_rep != NDR_record.int_rep | |
592 | || ndr->char_rep != NDR_record.char_rep | |
593 | || ndr->float_rep != NDR_record.float_rep) | |
594 | return -1; | |
595 | return 0; | |
596 | } | |
597 | ||
598 | /* Decode an exception message. */ | |
599 | ||
bb00b29d TG |
600 | static int |
601 | darwin_decode_exception_message (mach_msg_header_t *hdr, | |
602 | struct inferior **pinf, | |
603 | darwin_thread_t **pthread) | |
a80b95ba | 604 | { |
bb00b29d TG |
605 | mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1); |
606 | mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1); | |
607 | NDR_record_t *ndr; | |
608 | integer_t *data; | |
609 | struct inferior *inf; | |
610 | darwin_thread_t *thread; | |
611 | task_t task_port; | |
612 | thread_t thread_port; | |
a80b95ba | 613 | kern_return_t kret; |
bb00b29d | 614 | int i; |
a80b95ba | 615 | |
a41f2563 TG |
616 | /* Check message destination. */ |
617 | if (hdr->msgh_local_port != darwin_ex_port) | |
bb00b29d TG |
618 | return -1; |
619 | ||
620 | /* Check message header. */ | |
621 | if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)) | |
622 | return -1; | |
623 | ||
624 | /* Check descriptors. */ | |
625 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
626 | + sizeof (*ndr) + 2 * sizeof (integer_t)) | |
627 | || bod->msgh_descriptor_count != 2 | |
628 | || desc[0].type != MACH_MSG_PORT_DESCRIPTOR | |
629 | || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND | |
630 | || desc[1].type != MACH_MSG_PORT_DESCRIPTOR | |
631 | || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND) | |
632 | return -1; | |
633 | ||
634 | /* Check data representation. */ | |
635 | ndr = (NDR_record_t *)(desc + 2); | |
82b19a4d | 636 | if (darwin_check_message_ndr (ndr) != 0) |
bb00b29d TG |
637 | return -1; |
638 | ||
639 | /* Ok, the hard work. */ | |
640 | data = (integer_t *)(ndr + 1); | |
641 | ||
bb00b29d TG |
642 | task_port = desc[1].name; |
643 | thread_port = desc[0].name; | |
a41f2563 | 644 | |
a41f2563 | 645 | /* Find process by port. */ |
bb00b29d | 646 | inf = darwin_find_inferior_by_task (task_port); |
bb00b29d | 647 | *pinf = inf; |
82b19a4d TG |
648 | |
649 | if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2 | |
650 | && data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP) | |
651 | { | |
652 | /* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0, | |
653 | as a new Mach task is created when a process exec. */ | |
654 | inf = darwin_find_new_inferior (task_port, thread_port); | |
655 | *pinf = inf; | |
656 | ||
657 | if (inf == NULL) | |
658 | { | |
659 | /* Deallocate task_port, unless it was saved. */ | |
660 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
661 | MACH_CHECK_ERROR (kret); | |
662 | } | |
663 | } | |
664 | else | |
665 | { | |
666 | /* We got new rights to the task, get rid of it. Do not get rid of | |
667 | thread right, as we will need it to find the thread. */ | |
668 | kret = mach_port_deallocate (mach_task_self (), task_port); | |
669 | MACH_CHECK_ERROR (kret); | |
670 | } | |
671 | ||
a41f2563 TG |
672 | if (inf == NULL) |
673 | { | |
674 | /* Not a known inferior. This could happen if the child fork, as | |
675 | the created process will inherit its exception port. | |
676 | FIXME: should the exception port be restored ? */ | |
677 | kern_return_t kret; | |
678 | mig_reply_error_t reply; | |
679 | ||
82b19a4d TG |
680 | inferior_debug |
681 | (4, _("darwin_decode_exception_message: unknown task 0x%x\n"), | |
682 | task_port); | |
683 | ||
15a9128a TG |
684 | /* Free thread port (we don't know it). */ |
685 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
686 | MACH_CHECK_ERROR (kret); | |
687 | ||
a41f2563 TG |
688 | darwin_encode_reply (&reply, hdr, KERN_SUCCESS); |
689 | ||
690 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
691 | reply.Head.msgh_size, 0, | |
692 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
693 | MACH_PORT_NULL); | |
694 | MACH_CHECK_ERROR (kret); | |
695 | ||
696 | return 0; | |
697 | } | |
bb00b29d TG |
698 | |
699 | /* Find thread by port. */ | |
700 | /* Check for new threads. Do it early so that the port in the exception | |
701 | message can be deallocated. */ | |
702 | darwin_check_new_threads (inf); | |
703 | ||
15a9128a TG |
704 | /* Free the thread port (as gdb knows the thread, it has already has a right |
705 | for it, so this just decrement a reference counter). */ | |
706 | kret = mach_port_deallocate (mach_task_self (), thread_port); | |
707 | MACH_CHECK_ERROR (kret); | |
708 | ||
bb00b29d TG |
709 | thread = darwin_find_thread (inf, thread_port); |
710 | if (thread == NULL) | |
711 | return -1; | |
712 | *pthread = thread; | |
713 | ||
a6290449 TG |
714 | /* The thread should be running. However we have observed cases where a |
715 | thread got a SIGTTIN message after being stopped. */ | |
484a26a8 TG |
716 | gdb_assert (thread->msg_state != DARWIN_MESSAGE); |
717 | ||
bb00b29d | 718 | /* Finish decoding. */ |
bb00b29d TG |
719 | thread->event.header = *hdr; |
720 | thread->event.thread_port = thread_port; | |
721 | thread->event.task_port = task_port; | |
722 | thread->event.ex_type = data[0]; | |
723 | thread->event.data_count = data[1]; | |
724 | ||
725 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc) | |
726 | + sizeof (*ndr) + 2 * sizeof (integer_t) | |
727 | + data[1] * sizeof (integer_t))) | |
728 | return -1; | |
729 | for (i = 0; i < data[1]; i++) | |
730 | thread->event.ex_data[i] = data[2 + i]; | |
731 | ||
732 | thread->msg_state = DARWIN_MESSAGE; | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
82b19a4d TG |
737 | /* Decode dead_name notify message. */ |
738 | ||
739 | static int | |
740 | darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf) | |
741 | { | |
742 | NDR_record_t *ndr = (NDR_record_t *)(hdr + 1); | |
743 | integer_t *data = (integer_t *)(ndr + 1); | |
744 | struct inferior *inf; | |
745 | darwin_thread_t *thread; | |
746 | task_t task_port; | |
747 | thread_t thread_port; | |
748 | kern_return_t kret; | |
749 | int i; | |
750 | ||
751 | /* Check message header. */ | |
752 | if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX) | |
753 | return -1; | |
754 | ||
755 | /* Check descriptors. */ | |
756 | if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t))) | |
757 | return -2; | |
758 | ||
759 | /* Check data representation. */ | |
760 | if (darwin_check_message_ndr (ndr) != 0) | |
761 | return -3; | |
762 | ||
763 | task_port = data[0]; | |
764 | ||
765 | /* Find process by port. */ | |
766 | inf = darwin_find_inferior_by_task (task_port); | |
767 | *pinf = inf; | |
768 | ||
089354bb SM |
769 | darwin_inferior *priv = get_darwin_inferior (inf); |
770 | ||
82b19a4d | 771 | /* Check message destination. */ |
089354bb | 772 | if (inf != NULL && hdr->msgh_local_port != priv->notify_port) |
82b19a4d TG |
773 | return -4; |
774 | ||
775 | return 0; | |
776 | } | |
777 | ||
bb00b29d TG |
778 | static void |
779 | darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr, | |
780 | integer_t code) | |
781 | { | |
782 | mach_msg_header_t *rh = &reply->Head; | |
a6290449 TG |
783 | |
784 | rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0); | |
bb00b29d | 785 | rh->msgh_remote_port = hdr->msgh_remote_port; |
a6290449 | 786 | rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t); |
bb00b29d TG |
787 | rh->msgh_local_port = MACH_PORT_NULL; |
788 | rh->msgh_id = hdr->msgh_id + 100; | |
789 | ||
790 | reply->NDR = NDR_record; | |
791 | reply->RetCode = code; | |
a80b95ba TG |
792 | } |
793 | ||
bb00b29d TG |
794 | static void |
795 | darwin_send_reply (struct inferior *inf, darwin_thread_t *thread) | |
a80b95ba TG |
796 | { |
797 | kern_return_t kret; | |
bb00b29d | 798 | mig_reply_error_t reply; |
089354bb | 799 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 800 | |
bb00b29d TG |
801 | darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS); |
802 | ||
803 | kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT, | |
804 | reply.Head.msgh_size, 0, | |
805 | MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
806 | MACH_PORT_NULL); | |
a80b95ba TG |
807 | MACH_CHECK_ERROR (kret); |
808 | ||
089354bb | 809 | priv->pending_messages--; |
bb00b29d TG |
810 | } |
811 | ||
6821842f SM |
812 | /* Wrapper around the __pthread_kill syscall. We use this instead of the |
813 | pthread_kill function to be able to send a signal to any kind of thread, | |
814 | including GCD threads. */ | |
815 | ||
816 | static int | |
817 | darwin_pthread_kill (darwin_thread_t *thread, int nsignal) | |
818 | { | |
819 | DIAGNOSTIC_PUSH; | |
820 | DIAGNOSTIC_IGNORE_DEPRECATED_DECLARATIONS; | |
821 | int res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal); | |
822 | DIAGNOSTIC_POP; | |
823 | return res; | |
824 | } | |
825 | ||
bb00b29d TG |
826 | static void |
827 | darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread, | |
828 | int step, int nsignal) | |
829 | { | |
a80b95ba | 830 | inferior_debug |
bb00b29d TG |
831 | (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"), |
832 | thread->msg_state, thread->gdb_port, step, nsignal); | |
833 | ||
834 | switch (thread->msg_state) | |
a80b95ba | 835 | { |
bb00b29d TG |
836 | case DARWIN_MESSAGE: |
837 | if (thread->event.ex_type == EXC_SOFTWARE | |
838 | && thread->event.ex_data[0] == EXC_SOFT_SIGNAL) | |
839 | { | |
840 | /* Either deliver a new signal or cancel the signal received. */ | |
6821842f SM |
841 | int res = PTRACE (PT_THUPDATE, inf->pid, |
842 | (caddr_t) (uintptr_t) thread->gdb_port, nsignal); | |
bb00b29d TG |
843 | if (res < 0) |
844 | inferior_debug (1, _("ptrace THUP: res=%d\n"), res); | |
845 | } | |
846 | else if (nsignal) | |
847 | { | |
848 | /* Note: ptrace is allowed only if the process is stopped. | |
849 | Directly send the signal to the thread. */ | |
6821842f | 850 | int res = darwin_pthread_kill (thread, nsignal); |
bb00b29d TG |
851 | inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"), |
852 | thread->gdb_port, nsignal, res); | |
853 | thread->signaled = 1; | |
854 | } | |
855 | ||
d987a266 | 856 | /* Set or reset single step. */ |
aa14fb50 TG |
857 | inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"), |
858 | thread->gdb_port, step); | |
859 | darwin_set_sstep (thread->gdb_port, step); | |
860 | thread->single_step = step; | |
bb00b29d TG |
861 | |
862 | darwin_send_reply (inf, thread); | |
863 | thread->msg_state = DARWIN_RUNNING; | |
864 | break; | |
865 | ||
866 | case DARWIN_RUNNING: | |
867 | break; | |
868 | ||
869 | case DARWIN_STOPPED: | |
6821842f | 870 | kern_return_t kret = thread_resume (thread->gdb_port); |
bb00b29d TG |
871 | MACH_CHECK_ERROR (kret); |
872 | ||
873 | thread->msg_state = DARWIN_RUNNING; | |
874 | break; | |
a80b95ba | 875 | } |
bb00b29d | 876 | } |
a80b95ba | 877 | |
bb00b29d | 878 | /* Resume all threads of the inferior. */ |
a80b95ba | 879 | |
bb00b29d TG |
880 | static void |
881 | darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal) | |
882 | { | |
089354bb | 883 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 884 | |
089354bb | 885 | for (darwin_thread_t *thread : priv->threads) |
bb00b29d | 886 | darwin_resume_thread (inf, thread, step, nsignal); |
a80b95ba TG |
887 | } |
888 | ||
bb00b29d | 889 | struct resume_inferior_threads_param |
a80b95ba | 890 | { |
bb00b29d TG |
891 | int step; |
892 | int nsignal; | |
893 | }; | |
894 | ||
895 | static int | |
896 | darwin_resume_inferior_threads_it (struct inferior *inf, void *param) | |
897 | { | |
898 | int step = ((struct resume_inferior_threads_param *)param)->step; | |
899 | int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal; | |
900 | ||
901 | darwin_resume_inferior_threads (inf, step, nsignal); | |
902 | ||
903 | return 0; | |
904 | } | |
905 | ||
906 | /* Suspend all threads of INF. */ | |
907 | ||
908 | static void | |
909 | darwin_suspend_inferior_threads (struct inferior *inf) | |
910 | { | |
089354bb | 911 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 912 | |
089354bb SM |
913 | for (darwin_thread_t *thread : priv->threads) |
914 | { | |
915 | switch (thread->msg_state) | |
916 | { | |
917 | case DARWIN_STOPPED: | |
918 | case DARWIN_MESSAGE: | |
919 | break; | |
920 | case DARWIN_RUNNING: | |
921 | { | |
922 | kern_return_t kret = thread_suspend (thread->gdb_port); | |
923 | MACH_CHECK_ERROR (kret); | |
924 | thread->msg_state = DARWIN_STOPPED; | |
925 | break; | |
926 | } | |
927 | } | |
928 | } | |
bb00b29d | 929 | } |
a80b95ba | 930 | |
f6ac5f3d PA |
931 | void |
932 | darwin_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signal) | |
bb00b29d TG |
933 | { |
934 | struct target_waitstatus status; | |
935 | int pid; | |
a80b95ba | 936 | |
bb00b29d TG |
937 | kern_return_t kret; |
938 | int res; | |
939 | int nsignal; | |
940 | struct inferior *inf; | |
a80b95ba | 941 | |
bb00b29d | 942 | inferior_debug |
3eb831e0 | 943 | (2, _("darwin_resume: pid=%d, tid=0x%lx, step=%d, signal=%d\n"), |
cc6bcb54 | 944 | ptid.pid (), ptid.tid (), step, signal); |
bb00b29d | 945 | |
a493e3e2 | 946 | if (signal == GDB_SIGNAL_0) |
bb00b29d TG |
947 | nsignal = 0; |
948 | else | |
2ea28649 | 949 | nsignal = gdb_signal_to_host (signal); |
a80b95ba | 950 | |
bb00b29d TG |
951 | /* Don't try to single step all threads. */ |
952 | if (step) | |
953 | ptid = inferior_ptid; | |
954 | ||
955 | /* minus_one_ptid is RESUME_ALL. */ | |
d7e15655 | 956 | if (ptid == minus_one_ptid) |
a80b95ba | 957 | { |
bb00b29d TG |
958 | struct resume_inferior_threads_param param; |
959 | ||
960 | param.nsignal = nsignal; | |
961 | param.step = step; | |
a80b95ba | 962 | |
bb00b29d TG |
963 | /* Resume threads. */ |
964 | iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m); | |
965 | /* Resume tasks. */ | |
966 | iterate_over_inferiors (darwin_resume_inferior_it, NULL); | |
967 | } | |
968 | else | |
a80b95ba | 969 | { |
c9657e70 | 970 | struct inferior *inf = find_inferior_ptid (ptid); |
cc6bcb54 | 971 | long tid = ptid.tid (); |
bb00b29d TG |
972 | |
973 | /* Stop the inferior (should be useless). */ | |
974 | darwin_suspend_inferior (inf); | |
975 | ||
976 | if (tid == 0) | |
977 | darwin_resume_inferior_threads (inf, step, nsignal); | |
978 | else | |
979 | { | |
980 | darwin_thread_t *thread; | |
981 | ||
982 | /* Suspend threads of the task. */ | |
983 | darwin_suspend_inferior_threads (inf); | |
984 | ||
985 | /* Resume the selected thread. */ | |
986 | thread = darwin_find_thread (inf, tid); | |
987 | gdb_assert (thread); | |
988 | darwin_resume_thread (inf, thread, step, nsignal); | |
989 | } | |
990 | ||
991 | /* Resume the task. */ | |
992 | darwin_resume_inferior (inf); | |
a80b95ba | 993 | } |
bb00b29d | 994 | } |
a80b95ba | 995 | |
bb00b29d TG |
996 | static ptid_t |
997 | darwin_decode_message (mach_msg_header_t *hdr, | |
998 | darwin_thread_t **pthread, | |
999 | struct inferior **pinf, | |
1000 | struct target_waitstatus *status) | |
1001 | { | |
1002 | darwin_thread_t *thread; | |
1003 | struct inferior *inf; | |
a80b95ba | 1004 | |
a41f2563 TG |
1005 | /* Exception message. 2401 == 0x961 is exc. */ |
1006 | if (hdr->msgh_id == 2401) | |
a80b95ba | 1007 | { |
bb00b29d TG |
1008 | int res; |
1009 | ||
1010 | /* Decode message. */ | |
1011 | res = darwin_decode_exception_message (hdr, &inf, &thread); | |
1012 | ||
1013 | if (res < 0) | |
a80b95ba | 1014 | { |
bb00b29d | 1015 | /* Should not happen... */ |
c8c9911f JB |
1016 | printf_unfiltered |
1017 | (_("darwin_wait: ill-formatted message (id=0x%x)\n"), hdr->msgh_id); | |
bb00b29d | 1018 | /* FIXME: send a failure reply? */ |
a41f2563 TG |
1019 | status->kind = TARGET_WAITKIND_IGNORE; |
1020 | return minus_one_ptid; | |
1021 | } | |
1022 | if (inf == NULL) | |
1023 | { | |
1024 | status->kind = TARGET_WAITKIND_IGNORE; | |
a80b95ba TG |
1025 | return minus_one_ptid; |
1026 | } | |
bb00b29d TG |
1027 | *pinf = inf; |
1028 | *pthread = thread; | |
089354bb SM |
1029 | |
1030 | darwin_inferior *priv = get_darwin_inferior (inf); | |
1031 | ||
1032 | priv->pending_messages++; | |
a80b95ba TG |
1033 | |
1034 | status->kind = TARGET_WAITKIND_STOPPED; | |
bb00b29d TG |
1035 | thread->msg_state = DARWIN_MESSAGE; |
1036 | ||
c8c9911f | 1037 | inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"), |
bb00b29d TG |
1038 | thread->gdb_port, |
1039 | unparse_exception_type (thread->event.ex_type)); | |
a80b95ba | 1040 | |
bb00b29d | 1041 | switch (thread->event.ex_type) |
a80b95ba TG |
1042 | { |
1043 | case EXC_BAD_ACCESS: | |
4e225075 | 1044 | status->value.sig = GDB_EXC_BAD_ACCESS; |
a80b95ba TG |
1045 | break; |
1046 | case EXC_BAD_INSTRUCTION: | |
4e225075 | 1047 | status->value.sig = GDB_EXC_BAD_INSTRUCTION; |
a80b95ba TG |
1048 | break; |
1049 | case EXC_ARITHMETIC: | |
4e225075 | 1050 | status->value.sig = GDB_EXC_ARITHMETIC; |
a80b95ba TG |
1051 | break; |
1052 | case EXC_EMULATION: | |
4e225075 | 1053 | status->value.sig = GDB_EXC_EMULATION; |
a80b95ba TG |
1054 | break; |
1055 | case EXC_SOFTWARE: | |
bb00b29d | 1056 | if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL) |
a80b95ba | 1057 | { |
bb00b29d | 1058 | status->value.sig = |
2ea28649 | 1059 | gdb_signal_from_host (thread->event.ex_data[1]); |
bb00b29d TG |
1060 | inferior_debug (5, _(" (signal %d: %s)\n"), |
1061 | thread->event.ex_data[1], | |
2ea28649 | 1062 | gdb_signal_to_name (status->value.sig)); |
bb00b29d TG |
1063 | |
1064 | /* If the thread is stopped because it has received a signal | |
1065 | that gdb has just sent, continue. */ | |
1066 | if (thread->signaled) | |
1067 | { | |
1068 | thread->signaled = 0; | |
1069 | darwin_send_reply (inf, thread); | |
1070 | thread->msg_state = DARWIN_RUNNING; | |
1071 | status->kind = TARGET_WAITKIND_IGNORE; | |
1072 | } | |
a80b95ba TG |
1073 | } |
1074 | else | |
4e225075 | 1075 | status->value.sig = GDB_EXC_SOFTWARE; |
a80b95ba TG |
1076 | break; |
1077 | case EXC_BREAKPOINT: | |
1078 | /* Many internal GDB routines expect breakpoints to be reported | |
4e225075 | 1079 | as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT |
0963b4bd | 1080 | as a spurious signal. */ |
a493e3e2 | 1081 | status->value.sig = GDB_SIGNAL_TRAP; |
a80b95ba TG |
1082 | break; |
1083 | default: | |
a493e3e2 | 1084 | status->value.sig = GDB_SIGNAL_UNKNOWN; |
a80b95ba TG |
1085 | break; |
1086 | } | |
1087 | ||
fd79271b | 1088 | return ptid_t (inf->pid, 0, thread->gdb_port); |
bb00b29d | 1089 | } |
a41f2563 | 1090 | else if (hdr->msgh_id == 0x48) |
bb00b29d | 1091 | { |
a41f2563 | 1092 | /* MACH_NOTIFY_DEAD_NAME: notification for exit. */ |
82b19a4d TG |
1093 | int res; |
1094 | ||
1095 | res = darwin_decode_notify_message (hdr, &inf); | |
1096 | ||
1097 | if (res < 0) | |
1098 | { | |
1099 | /* Should not happen... */ | |
1100 | printf_unfiltered | |
1101 | (_("darwin_wait: ill-formatted message (id=0x%x, res=%d)\n"), | |
1102 | hdr->msgh_id, res); | |
1103 | } | |
1104 | ||
a41f2563 TG |
1105 | *pinf = NULL; |
1106 | *pthread = NULL; | |
bb00b29d | 1107 | |
82b19a4d TG |
1108 | if (res < 0 || inf == NULL) |
1109 | { | |
1110 | status->kind = TARGET_WAITKIND_IGNORE; | |
1111 | return minus_one_ptid; | |
1112 | } | |
1113 | ||
a41f2563 TG |
1114 | if (inf != NULL) |
1115 | { | |
089354bb SM |
1116 | darwin_inferior *priv = get_darwin_inferior (inf); |
1117 | ||
1118 | if (!priv->no_ptrace) | |
bb00b29d | 1119 | { |
a41f2563 TG |
1120 | pid_t res; |
1121 | int wstatus; | |
1122 | ||
1123 | res = wait4 (inf->pid, &wstatus, 0, NULL); | |
1124 | if (res < 0 || res != inf->pid) | |
1125 | { | |
1126 | printf_unfiltered (_("wait4: res=%d: %s\n"), | |
1127 | res, safe_strerror (errno)); | |
1128 | status->kind = TARGET_WAITKIND_IGNORE; | |
1129 | return minus_one_ptid; | |
1130 | } | |
1131 | if (WIFEXITED (wstatus)) | |
1132 | { | |
1133 | status->kind = TARGET_WAITKIND_EXITED; | |
1134 | status->value.integer = WEXITSTATUS (wstatus); | |
1135 | } | |
1136 | else | |
1137 | { | |
1138 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
5ae00552 | 1139 | status->value.sig = gdb_signal_from_host (WTERMSIG (wstatus)); |
a41f2563 TG |
1140 | } |
1141 | ||
1142 | inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"), | |
1143 | res, wstatus); | |
1144 | ||
1145 | /* Looks necessary on Leopard and harmless... */ | |
1146 | wait4 (inf->pid, &wstatus, 0, NULL); | |
1147 | ||
fd79271b | 1148 | inferior_ptid = ptid_t (inf->pid, 0, 0); |
82b19a4d | 1149 | return inferior_ptid; |
bb00b29d TG |
1150 | } |
1151 | else | |
1152 | { | |
a41f2563 TG |
1153 | inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid); |
1154 | status->kind = TARGET_WAITKIND_EXITED; | |
1155 | status->value.integer = 0; /* Don't know. */ | |
fd79271b | 1156 | return ptid_t (inf->pid, 0, 0); |
bb00b29d | 1157 | } |
bb00b29d TG |
1158 | } |
1159 | } | |
1160 | ||
a41f2563 | 1161 | /* Unknown message. */ |
86ad98c3 | 1162 | warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id); |
a41f2563 | 1163 | status->kind = TARGET_WAITKIND_IGNORE; |
bb00b29d TG |
1164 | return minus_one_ptid; |
1165 | } | |
1166 | ||
1167 | static int | |
1168 | cancel_breakpoint (ptid_t ptid) | |
1169 | { | |
0963b4bd | 1170 | /* Arrange for a breakpoint to be hit again later. We will handle |
bb00b29d TG |
1171 | the current event, eventually we will resume this thread, and this |
1172 | breakpoint will trap again. | |
1173 | ||
1174 | If we do not do this, then we run the risk that the user will | |
1175 | delete or disable the breakpoint, but the thread will have already | |
1176 | tripped on it. */ | |
1177 | ||
1178 | struct regcache *regcache = get_thread_regcache (ptid); | |
ac7936df | 1179 | struct gdbarch *gdbarch = regcache->arch (); |
bb00b29d | 1180 | CORE_ADDR pc; |
a80b95ba | 1181 | |
527a273a | 1182 | pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch); |
a01bda52 | 1183 | if (breakpoint_inserted_here_p (regcache->aspace (), pc)) |
bb00b29d | 1184 | { |
3eb831e0 | 1185 | inferior_debug (4, "cancel_breakpoint for thread 0x%lx\n", |
cc6bcb54 | 1186 | (unsigned long) ptid.tid ()); |
bb00b29d TG |
1187 | |
1188 | /* Back up the PC if necessary. */ | |
527a273a | 1189 | if (gdbarch_decr_pc_after_break (gdbarch)) |
bb00b29d TG |
1190 | regcache_write_pc (regcache, pc); |
1191 | ||
1192 | return 1; | |
a80b95ba | 1193 | } |
bb00b29d TG |
1194 | return 0; |
1195 | } | |
1196 | ||
1197 | static ptid_t | |
1198 | darwin_wait (ptid_t ptid, struct target_waitstatus *status) | |
1199 | { | |
1200 | kern_return_t kret; | |
1201 | union | |
1202 | { | |
1203 | mach_msg_header_t hdr; | |
1204 | char data[0x100]; | |
1205 | } msgin; | |
1206 | mach_msg_header_t *hdr = &msgin.hdr; | |
1207 | ptid_t res; | |
1208 | darwin_thread_t *thread; | |
1209 | struct inferior *inf; | |
1210 | ||
1211 | inferior_debug | |
1212 | (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"), | |
cc6bcb54 | 1213 | ptid.pid (), ptid.tid ()); |
bb00b29d TG |
1214 | |
1215 | /* Handle fake stop events at first. */ | |
1216 | if (darwin_inf_fake_stop != NULL) | |
1217 | { | |
1218 | inf = darwin_inf_fake_stop; | |
1219 | darwin_inf_fake_stop = NULL; | |
1220 | ||
089354bb SM |
1221 | darwin_inferior *priv = get_darwin_inferior (inf); |
1222 | ||
bb00b29d | 1223 | status->kind = TARGET_WAITKIND_STOPPED; |
a493e3e2 | 1224 | status->value.sig = GDB_SIGNAL_TRAP; |
089354bb | 1225 | thread = priv->threads[0]; |
bb00b29d | 1226 | thread->msg_state = DARWIN_STOPPED; |
fd79271b | 1227 | return ptid_t (inf->pid, 0, thread->gdb_port); |
bb00b29d TG |
1228 | } |
1229 | ||
1230 | do | |
1231 | { | |
1232 | /* set_sigint_trap (); */ | |
1233 | ||
1234 | /* Wait for a message. */ | |
1235 | kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0, | |
1236 | sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL); | |
1237 | ||
1238 | /* clear_sigint_trap (); */ | |
1239 | ||
1240 | if (kret == MACH_RCV_INTERRUPTED) | |
1241 | { | |
1242 | status->kind = TARGET_WAITKIND_IGNORE; | |
1243 | return minus_one_ptid; | |
1244 | } | |
1245 | ||
1246 | if (kret != MACH_MSG_SUCCESS) | |
1247 | { | |
c8c9911f | 1248 | inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret); |
bb00b29d TG |
1249 | status->kind = TARGET_WAITKIND_SPURIOUS; |
1250 | return minus_one_ptid; | |
1251 | } | |
1252 | ||
1253 | /* Debug: display message. */ | |
1254 | if (darwin_debug_flag > 10) | |
1255 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1256 | ||
1257 | res = darwin_decode_message (hdr, &thread, &inf, status); | |
d7e15655 | 1258 | if (res == minus_one_ptid) |
a41f2563 | 1259 | continue; |
bb00b29d | 1260 | |
a41f2563 | 1261 | /* Early return in case an inferior has exited. */ |
bb00b29d TG |
1262 | if (inf == NULL) |
1263 | return res; | |
1264 | } | |
1265 | while (status->kind == TARGET_WAITKIND_IGNORE); | |
1266 | ||
1267 | /* Stop all tasks. */ | |
1268 | iterate_over_inferiors (darwin_suspend_inferior_it, NULL); | |
1269 | ||
1270 | /* Read pending messages. */ | |
1271 | while (1) | |
a80b95ba | 1272 | { |
bb00b29d TG |
1273 | struct target_waitstatus status2; |
1274 | ptid_t ptid2; | |
1275 | ||
1276 | kret = mach_msg (&msgin.hdr, | |
1277 | MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, | |
1278 | sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL); | |
1279 | ||
1280 | if (kret == MACH_RCV_TIMED_OUT) | |
1281 | break; | |
1282 | if (kret != MACH_MSG_SUCCESS) | |
1283 | { | |
1284 | inferior_debug | |
c8c9911f | 1285 | (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret); |
bb00b29d TG |
1286 | break; |
1287 | } | |
1288 | ||
a41f2563 TG |
1289 | /* Debug: display message. */ |
1290 | if (darwin_debug_flag > 10) | |
1291 | darwin_dump_message (hdr, darwin_debug_flag > 11); | |
1292 | ||
bb00b29d | 1293 | ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2); |
a80b95ba | 1294 | |
bb00b29d TG |
1295 | if (inf != NULL && thread != NULL |
1296 | && thread->event.ex_type == EXC_BREAKPOINT) | |
a80b95ba | 1297 | { |
bb00b29d | 1298 | if (thread->single_step |
fd79271b | 1299 | || cancel_breakpoint (ptid_t (inf->pid, 0, thread->gdb_port))) |
bb00b29d TG |
1300 | { |
1301 | gdb_assert (thread->msg_state == DARWIN_MESSAGE); | |
1302 | darwin_send_reply (inf, thread); | |
1303 | thread->msg_state = DARWIN_RUNNING; | |
1304 | } | |
1305 | else | |
1306 | inferior_debug | |
c8c9911f | 1307 | (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"), |
bb00b29d | 1308 | thread->gdb_port); |
a80b95ba | 1309 | } |
bb00b29d TG |
1310 | else |
1311 | inferior_debug (3, _("darwin_wait: unhandled pending message\n")); | |
1312 | } | |
1313 | return res; | |
1314 | } | |
a80b95ba | 1315 | |
f6ac5f3d PA |
1316 | ptid_t |
1317 | darwin_nat_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
1318 | int options) | |
bb00b29d TG |
1319 | { |
1320 | return darwin_wait (ptid, status); | |
1321 | } | |
a80b95ba | 1322 | |
f6ac5f3d PA |
1323 | void |
1324 | darwin_nat_target::interrupt () | |
bb00b29d TG |
1325 | { |
1326 | struct inferior *inf = current_inferior (); | |
089354bb | 1327 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1328 | |
bb00b29d | 1329 | /* FIXME: handle in no_ptrace mode. */ |
089354bb | 1330 | gdb_assert (!priv->no_ptrace); |
f6ac5f3d | 1331 | ::kill (inf->pid, SIGINT); |
a80b95ba TG |
1332 | } |
1333 | ||
82b19a4d TG |
1334 | /* Deallocate threads port and vector. */ |
1335 | ||
a80b95ba | 1336 | static void |
82b19a4d | 1337 | darwin_deallocate_threads (struct inferior *inf) |
a80b95ba | 1338 | { |
089354bb SM |
1339 | darwin_inferior *priv = get_darwin_inferior (inf); |
1340 | ||
1341 | for (darwin_thread_t *t : priv->threads) | |
a80b95ba | 1342 | { |
089354bb SM |
1343 | kern_return_t kret = mach_port_deallocate (gdb_task, t->gdb_port); |
1344 | MACH_CHECK_ERROR (kret); | |
a80b95ba | 1345 | } |
089354bb SM |
1346 | |
1347 | priv->threads.clear (); | |
82b19a4d | 1348 | } |
a80b95ba | 1349 | |
f6ac5f3d PA |
1350 | void |
1351 | darwin_nat_target::mourn_inferior () | |
82b19a4d TG |
1352 | { |
1353 | struct inferior *inf = current_inferior (); | |
089354bb | 1354 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1355 | kern_return_t kret; |
1356 | mach_port_t prev; | |
1357 | int i; | |
1358 | ||
1359 | /* Deallocate threads. */ | |
1360 | darwin_deallocate_threads (inf); | |
1361 | ||
1362 | /* Remove notify_port from darwin_port_set. */ | |
bb00b29d | 1363 | kret = mach_port_move_member (gdb_task, |
089354bb | 1364 | priv->notify_port, MACH_PORT_NULL); |
fda184b6 | 1365 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1366 | |
82b19a4d | 1367 | /* Remove task port dead_name notification. */ |
089354bb | 1368 | kret = mach_port_request_notification (gdb_task, priv->task, |
a80b95ba | 1369 | MACH_NOTIFY_DEAD_NAME, 0, |
bb00b29d | 1370 | MACH_PORT_NULL, |
a80b95ba TG |
1371 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1372 | &prev); | |
1373 | /* This can fail if the task is dead. */ | |
c8c9911f | 1374 | inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n", |
089354bb | 1375 | priv->task, prev, priv->notify_port); |
bb00b29d | 1376 | |
a80b95ba TG |
1377 | if (kret == KERN_SUCCESS) |
1378 | { | |
1379 | kret = mach_port_deallocate (gdb_task, prev); | |
1380 | MACH_CHECK_ERROR (kret); | |
1381 | } | |
1382 | ||
82b19a4d | 1383 | /* Destroy notify_port. */ |
089354bb | 1384 | kret = mach_port_destroy (gdb_task, priv->notify_port); |
bb00b29d TG |
1385 | MACH_CHECK_ERROR (kret); |
1386 | ||
a80b95ba | 1387 | /* Deallocate saved exception ports. */ |
089354bb | 1388 | darwin_deallocate_exception_ports (priv); |
a80b95ba | 1389 | |
82b19a4d | 1390 | /* Deallocate task port. */ |
089354bb | 1391 | kret = mach_port_deallocate (gdb_task, priv->task); |
a80b95ba TG |
1392 | MACH_CHECK_ERROR (kret); |
1393 | ||
fe978cb0 | 1394 | inf->priv = NULL; |
a80b95ba | 1395 | |
f6ac5f3d | 1396 | inf_child_target::mourn_inferior (); |
a80b95ba TG |
1397 | } |
1398 | ||
1399 | static void | |
bb00b29d | 1400 | darwin_reply_to_all_pending_messages (struct inferior *inf) |
a80b95ba | 1401 | { |
089354bb | 1402 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1403 | |
089354bb | 1404 | for (darwin_thread_t *t : priv->threads) |
bb00b29d TG |
1405 | { |
1406 | if (t->msg_state == DARWIN_MESSAGE) | |
1407 | darwin_resume_thread (inf, t, 0, 0); | |
1408 | } | |
a80b95ba TG |
1409 | } |
1410 | ||
1411 | static void | |
bb00b29d | 1412 | darwin_stop_inferior (struct inferior *inf) |
a80b95ba TG |
1413 | { |
1414 | struct target_waitstatus wstatus; | |
1415 | ptid_t ptid; | |
1416 | kern_return_t kret; | |
1417 | int status; | |
1418 | int res; | |
089354bb | 1419 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba | 1420 | |
bb00b29d | 1421 | gdb_assert (inf != NULL); |
a80b95ba | 1422 | |
bb00b29d | 1423 | darwin_suspend_inferior (inf); |
a80b95ba | 1424 | |
bb00b29d | 1425 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1426 | |
089354bb | 1427 | if (priv->no_ptrace) |
bb00b29d | 1428 | return; |
a80b95ba | 1429 | |
bb00b29d TG |
1430 | res = kill (inf->pid, SIGSTOP); |
1431 | if (res != 0) | |
b37520b6 | 1432 | warning (_("cannot kill: %s"), safe_strerror (errno)); |
a80b95ba | 1433 | |
bb00b29d TG |
1434 | /* Wait until the process is really stopped. */ |
1435 | while (1) | |
a80b95ba | 1436 | { |
bb00b29d TG |
1437 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1438 | if (wstatus.kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 1439 | && wstatus.value.sig == GDB_SIGNAL_STOP) |
bb00b29d | 1440 | break; |
a80b95ba TG |
1441 | } |
1442 | } | |
1443 | ||
1444 | static kern_return_t | |
1445 | darwin_save_exception_ports (darwin_inferior *inf) | |
1446 | { | |
1447 | kern_return_t kret; | |
1448 | ||
1449 | inf->exception_info.count = | |
1450 | sizeof (inf->exception_info.ports) / sizeof (inf->exception_info.ports[0]); | |
1451 | ||
1452 | kret = task_get_exception_ports | |
1453 | (inf->task, EXC_MASK_ALL, inf->exception_info.masks, | |
1454 | &inf->exception_info.count, inf->exception_info.ports, | |
1455 | inf->exception_info.behaviors, inf->exception_info.flavors); | |
1456 | return kret; | |
1457 | } | |
1458 | ||
1459 | static kern_return_t | |
1460 | darwin_restore_exception_ports (darwin_inferior *inf) | |
1461 | { | |
1462 | int i; | |
1463 | kern_return_t kret; | |
1464 | ||
1465 | for (i = 0; i < inf->exception_info.count; i++) | |
1466 | { | |
1467 | kret = task_set_exception_ports | |
1468 | (inf->task, inf->exception_info.masks[i], inf->exception_info.ports[i], | |
1469 | inf->exception_info.behaviors[i], inf->exception_info.flavors[i]); | |
1470 | if (kret != KERN_SUCCESS) | |
1471 | return kret; | |
1472 | } | |
1473 | ||
1474 | return KERN_SUCCESS; | |
1475 | } | |
1476 | ||
82b19a4d TG |
1477 | /* Deallocate saved exception ports. */ |
1478 | ||
1479 | static void | |
1480 | darwin_deallocate_exception_ports (darwin_inferior *inf) | |
1481 | { | |
1482 | int i; | |
1483 | kern_return_t kret; | |
1484 | ||
1485 | for (i = 0; i < inf->exception_info.count; i++) | |
1486 | { | |
1487 | kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]); | |
1488 | MACH_CHECK_ERROR (kret); | |
1489 | } | |
1490 | inf->exception_info.count = 0; | |
1491 | } | |
1492 | ||
1493 | static void | |
1494 | darwin_setup_exceptions (struct inferior *inf) | |
1495 | { | |
089354bb | 1496 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1497 | kern_return_t kret; |
1498 | int traps_expected; | |
1499 | exception_mask_t mask; | |
1500 | ||
089354bb | 1501 | kret = darwin_save_exception_ports (priv); |
82b19a4d TG |
1502 | if (kret != KERN_SUCCESS) |
1503 | error (_("Unable to save exception ports, task_get_exception_ports" | |
1504 | "returned: %d"), | |
1505 | kret); | |
1506 | ||
1507 | /* Set exception port. */ | |
1508 | if (enable_mach_exceptions) | |
1509 | mask = EXC_MASK_ALL; | |
1510 | else | |
1511 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; | |
089354bb | 1512 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
82b19a4d TG |
1513 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
1514 | if (kret != KERN_SUCCESS) | |
1515 | error (_("Unable to set exception ports, task_set_exception_ports" | |
1516 | "returned: %d"), | |
1517 | kret); | |
1518 | } | |
1519 | ||
f6ac5f3d PA |
1520 | void |
1521 | darwin_nat_target::kill () | |
bb00b29d TG |
1522 | { |
1523 | struct inferior *inf = current_inferior (); | |
089354bb | 1524 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
1525 | struct target_waitstatus wstatus; |
1526 | ptid_t ptid; | |
1527 | kern_return_t kret; | |
1528 | int status; | |
1529 | int res; | |
1530 | ||
d7e15655 | 1531 | if (inferior_ptid == null_ptid) |
bb00b29d TG |
1532 | return; |
1533 | ||
1534 | gdb_assert (inf != NULL); | |
1535 | ||
089354bb | 1536 | kret = darwin_restore_exception_ports (priv); |
ee41036f | 1537 | MACH_CHECK_ERROR (kret); |
bb00b29d | 1538 | |
ee41036f | 1539 | darwin_reply_to_all_pending_messages (inf); |
bb00b29d | 1540 | |
f6ac5f3d | 1541 | res = ::kill (inf->pid, 9); |
bb00b29d | 1542 | |
ee41036f | 1543 | if (res == 0) |
bb00b29d | 1544 | { |
bb00b29d | 1545 | darwin_resume_inferior (inf); |
a6290449 | 1546 | |
bb00b29d TG |
1547 | ptid = darwin_wait (inferior_ptid, &wstatus); |
1548 | } | |
ee41036f TG |
1549 | else if (errno != ESRCH) |
1550 | warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"), | |
1551 | inf->pid, safe_strerror (errno)); | |
bb00b29d | 1552 | |
bc1e6c81 | 1553 | target_mourn_inferior (inferior_ptid); |
bb00b29d TG |
1554 | } |
1555 | ||
82b19a4d TG |
1556 | static void |
1557 | darwin_setup_request_notification (struct inferior *inf) | |
1558 | { | |
089354bb | 1559 | darwin_inferior *priv = get_darwin_inferior (inf); |
82b19a4d TG |
1560 | kern_return_t kret; |
1561 | mach_port_t prev_not; | |
1562 | ||
089354bb | 1563 | kret = mach_port_request_notification (gdb_task, priv->task, |
82b19a4d | 1564 | MACH_NOTIFY_DEAD_NAME, 0, |
089354bb | 1565 | priv->notify_port, |
82b19a4d TG |
1566 | MACH_MSG_TYPE_MAKE_SEND_ONCE, |
1567 | &prev_not); | |
1568 | if (kret != KERN_SUCCESS) | |
1569 | error (_("Termination notification request failed, " | |
1570 | "mach_port_request_notification\n" | |
1571 | "returned: %d"), | |
1572 | kret); | |
1573 | if (prev_not != MACH_PORT_NULL) | |
1574 | { | |
1575 | /* This is unexpected, as there should not be any previously | |
1576 | registered notification request. But this is not a fatal | |
1577 | issue, so just emit a warning. */ | |
1578 | warning (_("\ | |
1579 | A task termination request was registered before the debugger registered\n\ | |
1580 | its own. This is unexpected, but should otherwise not have any actual\n\ | |
1581 | impact on the debugging session.")); | |
1582 | } | |
1583 | } | |
1584 | ||
bb00b29d TG |
1585 | static void |
1586 | darwin_attach_pid (struct inferior *inf) | |
a80b95ba | 1587 | { |
a80b95ba TG |
1588 | kern_return_t kret; |
1589 | mach_port_t prev_port; | |
1590 | int traps_expected; | |
bb00b29d | 1591 | mach_port_t prev_not; |
a80b95ba TG |
1592 | exception_mask_t mask; |
1593 | ||
089354bb SM |
1594 | darwin_inferior *priv = new darwin_inferior; |
1595 | inf->priv.reset (priv); | |
bb00b29d | 1596 | |
a50c11c6 | 1597 | TRY |
a80b95ba | 1598 | { |
a50c11c6 TT |
1599 | kret = task_for_pid (gdb_task, inf->pid, &priv->task); |
1600 | if (kret != KERN_SUCCESS) | |
a80b95ba | 1601 | { |
a50c11c6 | 1602 | int status; |
a80b95ba | 1603 | |
a50c11c6 TT |
1604 | if (!inf->attach_flag) |
1605 | { | |
1606 | kill (inf->pid, 9); | |
1607 | waitpid (inf->pid, &status, 0); | |
1608 | } | |
a80b95ba | 1609 | |
a50c11c6 TT |
1610 | error |
1611 | (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n" | |
1612 | " (please check gdb is codesigned - see taskgated(8))"), | |
1613 | inf->pid, mach_error_string (kret), (unsigned long) kret); | |
1614 | } | |
a80b95ba | 1615 | |
a50c11c6 TT |
1616 | inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"), |
1617 | priv->task, inf->pid); | |
a80b95ba | 1618 | |
a50c11c6 TT |
1619 | if (darwin_ex_port == MACH_PORT_NULL) |
1620 | { | |
1621 | /* Create a port to get exceptions. */ | |
1622 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1623 | &darwin_ex_port); | |
1624 | if (kret != KERN_SUCCESS) | |
1625 | error (_("Unable to create exception port, mach_port_allocate " | |
1626 | "returned: %d"), | |
1627 | kret); | |
1628 | ||
1629 | kret = mach_port_insert_right (gdb_task, darwin_ex_port, | |
1630 | darwin_ex_port, | |
1631 | MACH_MSG_TYPE_MAKE_SEND); | |
1632 | if (kret != KERN_SUCCESS) | |
1633 | error (_("Unable to create exception port, mach_port_insert_right " | |
1634 | "returned: %d"), | |
1635 | kret); | |
1636 | ||
1637 | /* Create a port set and put ex_port in it. */ | |
1638 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET, | |
1639 | &darwin_port_set); | |
1640 | if (kret != KERN_SUCCESS) | |
1641 | error (_("Unable to create port set, mach_port_allocate " | |
1642 | "returned: %d"), | |
1643 | kret); | |
1644 | ||
1645 | kret = mach_port_move_member (gdb_task, darwin_ex_port, | |
1646 | darwin_port_set); | |
1647 | if (kret != KERN_SUCCESS) | |
1648 | error (_("Unable to move exception port into new port set, " | |
1649 | "mach_port_move_member\n" | |
1650 | "returned: %d"), | |
1651 | kret); | |
1652 | } | |
a80b95ba | 1653 | |
a50c11c6 TT |
1654 | /* Create a port to be notified when the child task terminates. */ |
1655 | kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE, | |
1656 | &priv->notify_port); | |
fda184b6 | 1657 | if (kret != KERN_SUCCESS) |
a50c11c6 | 1658 | error (_("Unable to create notification port, mach_port_allocate " |
fda184b6 JB |
1659 | "returned: %d"), |
1660 | kret); | |
a80b95ba | 1661 | |
a50c11c6 TT |
1662 | kret = mach_port_move_member (gdb_task, |
1663 | priv->notify_port, darwin_port_set); | |
fda184b6 | 1664 | if (kret != KERN_SUCCESS) |
a50c11c6 | 1665 | error (_("Unable to move notification port into new port set, " |
fda184b6 JB |
1666 | "mach_port_move_member\n" |
1667 | "returned: %d"), | |
1668 | kret); | |
a80b95ba | 1669 | |
a50c11c6 | 1670 | darwin_setup_request_notification (inf); |
a80b95ba | 1671 | |
a50c11c6 TT |
1672 | darwin_setup_exceptions (inf); |
1673 | } | |
1674 | CATCH (ex, RETURN_MASK_ALL) | |
1675 | { | |
a7d0f0f0 | 1676 | exit_inferior (inf); |
a50c11c6 | 1677 | inferior_ptid = null_ptid; |
a80b95ba | 1678 | |
a50c11c6 TT |
1679 | throw_exception (ex); |
1680 | } | |
1681 | END_CATCH | |
a80b95ba | 1682 | |
59f413d5 | 1683 | target_ops *darwin_ops = get_native_target (); |
6a3cb8e8 PA |
1684 | if (!target_is_pushed (darwin_ops)) |
1685 | push_target (darwin_ops); | |
a80b95ba TG |
1686 | } |
1687 | ||
7aabaf9d | 1688 | /* Get the thread_info object corresponding to this darwin_thread_info. */ |
db665f42 SM |
1689 | |
1690 | static struct thread_info * | |
7aabaf9d | 1691 | thread_info_from_private_thread_info (darwin_thread_info *pti) |
db665f42 SM |
1692 | { |
1693 | struct thread_info *it; | |
1694 | ||
1695 | ALL_THREADS (it) | |
1696 | { | |
7aabaf9d SM |
1697 | darwin_thread_info *iter_pti = get_darwin_thread_info (it); |
1698 | ||
1699 | if (iter_pti->gdb_port == pti->gdb_port) | |
db665f42 SM |
1700 | break; |
1701 | } | |
1702 | ||
1703 | gdb_assert (it != NULL); | |
1704 | ||
1705 | return it; | |
1706 | } | |
1707 | ||
a80b95ba | 1708 | static void |
bb00b29d | 1709 | darwin_init_thread_list (struct inferior *inf) |
a80b95ba | 1710 | { |
a80b95ba TG |
1711 | darwin_check_new_threads (inf); |
1712 | ||
089354bb | 1713 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d | 1714 | |
089354bb SM |
1715 | gdb_assert (!priv->threads.empty ()); |
1716 | ||
7aabaf9d | 1717 | darwin_thread_info *first_pti = priv->threads.front (); |
db665f42 SM |
1718 | struct thread_info *first_thread |
1719 | = thread_info_from_private_thread_info (first_pti); | |
1720 | ||
1721 | inferior_ptid = first_thread->ptid; | |
bb00b29d TG |
1722 | } |
1723 | ||
1724 | /* The child must synchronize with gdb: gdb must set the exception port | |
1725 | before the child call PTRACE_SIGEXC. We use a pipe to achieve this. | |
1726 | FIXME: is there a lighter way ? */ | |
1727 | static int ptrace_fds[2]; | |
1728 | ||
1729 | static void | |
1730 | darwin_ptrace_me (void) | |
1731 | { | |
1732 | int res; | |
1733 | char c; | |
1734 | ||
1735 | /* Close write end point. */ | |
0db8980c SDJ |
1736 | if (close (ptrace_fds[1]) < 0) |
1737 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1738 | |
1739 | /* Wait until gdb is ready. */ | |
1740 | res = read (ptrace_fds[0], &c, 1); | |
fda184b6 | 1741 | if (res != 0) |
0db8980c SDJ |
1742 | trace_start_error (_("unable to read from pipe, read returned: %d"), res); |
1743 | ||
1744 | if (close (ptrace_fds[0]) < 0) | |
1745 | trace_start_error_with_name ("close"); | |
bb00b29d TG |
1746 | |
1747 | /* Get rid of privileges. */ | |
0db8980c SDJ |
1748 | if (setegid (getgid ()) < 0) |
1749 | trace_start_error_with_name ("setegid"); | |
bb00b29d TG |
1750 | |
1751 | /* Set TRACEME. */ | |
0db8980c SDJ |
1752 | if (PTRACE (PT_TRACE_ME, 0, 0, 0) < 0) |
1753 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1754 | |
1755 | /* Redirect signals to exception port. */ | |
0db8980c SDJ |
1756 | if (PTRACE (PT_SIGEXC, 0, 0, 0) < 0) |
1757 | trace_start_error_with_name ("PTRACE"); | |
bb00b29d TG |
1758 | } |
1759 | ||
1760 | /* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */ | |
1761 | static void | |
1762 | darwin_pre_ptrace (void) | |
1763 | { | |
1764 | if (pipe (ptrace_fds) != 0) | |
1765 | { | |
1766 | ptrace_fds[0] = -1; | |
1767 | ptrace_fds[1] = -1; | |
1768 | error (_("unable to create a pipe: %s"), safe_strerror (errno)); | |
1769 | } | |
21ff4686 TT |
1770 | |
1771 | mark_fd_no_cloexec (ptrace_fds[0]); | |
1772 | mark_fd_no_cloexec (ptrace_fds[1]); | |
a80b95ba TG |
1773 | } |
1774 | ||
1775 | static void | |
1776 | darwin_ptrace_him (int pid) | |
1777 | { | |
1778 | task_t itask; | |
1779 | kern_return_t kret; | |
1780 | mach_port_t prev_port; | |
1781 | int traps_expected; | |
bb00b29d | 1782 | struct inferior *inf = current_inferior (); |
a80b95ba | 1783 | |
bb00b29d | 1784 | darwin_attach_pid (inf); |
a80b95ba TG |
1785 | |
1786 | /* Let's the child run. */ | |
1787 | close (ptrace_fds[0]); | |
1788 | close (ptrace_fds[1]); | |
1789 | ||
21ff4686 TT |
1790 | unmark_fd_no_cloexec (ptrace_fds[0]); |
1791 | unmark_fd_no_cloexec (ptrace_fds[1]); | |
1792 | ||
bb00b29d TG |
1793 | darwin_init_thread_list (inf); |
1794 | ||
2090129c | 1795 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
a80b95ba TG |
1796 | } |
1797 | ||
e69860f1 TG |
1798 | static void |
1799 | darwin_execvp (const char *file, char * const argv[], char * const env[]) | |
1800 | { | |
1801 | posix_spawnattr_t attr; | |
1802 | short ps_flags = 0; | |
f00c55f8 | 1803 | int res; |
e69860f1 | 1804 | |
f00c55f8 TG |
1805 | res = posix_spawnattr_init (&attr); |
1806 | if (res != 0) | |
e69860f1 TG |
1807 | { |
1808 | fprintf_unfiltered | |
1809 | (gdb_stderr, "Cannot initialize attribute for posix_spawn\n"); | |
1810 | return; | |
1811 | } | |
1812 | ||
1813 | /* Do like execve: replace the image. */ | |
1814 | ps_flags = POSIX_SPAWN_SETEXEC; | |
1815 | ||
1816 | /* Disable ASLR. The constant doesn't look to be available outside the | |
1817 | kernel include files. */ | |
1818 | #ifndef _POSIX_SPAWN_DISABLE_ASLR | |
1819 | #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 | |
1820 | #endif | |
1821 | ps_flags |= _POSIX_SPAWN_DISABLE_ASLR; | |
f00c55f8 TG |
1822 | res = posix_spawnattr_setflags (&attr, ps_flags); |
1823 | if (res != 0) | |
e69860f1 | 1824 | { |
f00c55f8 | 1825 | fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n"); |
e69860f1 TG |
1826 | return; |
1827 | } | |
1828 | ||
1829 | posix_spawnp (NULL, argv[0], NULL, &attr, argv, env); | |
1830 | } | |
1831 | ||
f6ac5f3d PA |
1832 | void |
1833 | darwin_nat_target::create_inferior (const char *exec_file, | |
1834 | const std::string &allargs, | |
1835 | char **env, int from_tty) | |
a80b95ba TG |
1836 | { |
1837 | /* Do the hard work. */ | |
db665f42 SM |
1838 | fork_inferior (exec_file, allargs, env, darwin_ptrace_me, |
1839 | darwin_ptrace_him, darwin_pre_ptrace, NULL, | |
1840 | darwin_execvp); | |
a80b95ba TG |
1841 | } |
1842 | \f | |
1843 | ||
726ce67c JB |
1844 | /* Set things up such that the next call to darwin_wait will immediately |
1845 | return a fake stop event for inferior INF. | |
1846 | ||
1847 | This assumes that the inferior's thread list has been initialized, | |
1848 | as it will suspend the inferior's first thread. */ | |
1849 | ||
1850 | static void | |
1851 | darwin_setup_fake_stop_event (struct inferior *inf) | |
1852 | { | |
089354bb | 1853 | darwin_inferior *priv = get_darwin_inferior (inf); |
726ce67c JB |
1854 | darwin_thread_t *thread; |
1855 | kern_return_t kret; | |
1856 | ||
1857 | gdb_assert (darwin_inf_fake_stop == NULL); | |
1858 | darwin_inf_fake_stop = inf; | |
1859 | ||
1860 | /* When detecting a fake pending stop event, darwin_wait returns | |
1861 | an event saying that the first thread is in a DARWIN_STOPPED | |
1862 | state. To make that accurate, we need to suspend that thread | |
1863 | as well. Otherwise, we'll try resuming it when resuming the | |
1864 | inferior, and get a warning because the thread's suspend count | |
1865 | is already zero, making the resume request useless. */ | |
089354bb | 1866 | thread = priv->threads[0]; |
726ce67c JB |
1867 | kret = thread_suspend (thread->gdb_port); |
1868 | MACH_CHECK_ERROR (kret); | |
1869 | } | |
1870 | ||
a80b95ba TG |
1871 | /* Attach to process PID, then initialize for debugging it |
1872 | and wait for the trace-trap that results from attaching. */ | |
f6ac5f3d PA |
1873 | void |
1874 | darwin_nat_target::attach (const char *args, int from_tty) | |
a80b95ba TG |
1875 | { |
1876 | pid_t pid; | |
1877 | pid_t pid2; | |
1878 | int wstatus; | |
1879 | int res; | |
1880 | struct inferior *inf; | |
bb00b29d | 1881 | kern_return_t kret; |
a80b95ba | 1882 | |
74164c56 | 1883 | pid = parse_pid_to_attach (args); |
a80b95ba | 1884 | |
74164c56 | 1885 | if (pid == getpid ()) /* Trying to masturbate? */ |
a80b95ba TG |
1886 | error (_("I refuse to debug myself!")); |
1887 | ||
1888 | if (from_tty) | |
bb00b29d TG |
1889 | { |
1890 | char *exec_file = get_exec_file (0); | |
a80b95ba | 1891 | |
bb00b29d TG |
1892 | if (exec_file) |
1893 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, | |
f2907e49 | 1894 | target_pid_to_str (ptid_t (pid))); |
bb00b29d TG |
1895 | else |
1896 | printf_unfiltered (_("Attaching to %s\n"), | |
f2907e49 | 1897 | target_pid_to_str (ptid_t (pid))); |
bb00b29d TG |
1898 | |
1899 | gdb_flush (gdb_stdout); | |
1900 | } | |
1901 | ||
f6ac5f3d | 1902 | if (pid == 0 || ::kill (pid, 0) < 0) |
bb00b29d TG |
1903 | error (_("Can't attach to process %d: %s (%d)"), |
1904 | pid, safe_strerror (errno), errno); | |
a80b95ba | 1905 | |
f2907e49 | 1906 | inferior_ptid = ptid_t (pid); |
6c95b8df PA |
1907 | inf = current_inferior (); |
1908 | inferior_appeared (inf, pid); | |
a80b95ba | 1909 | inf->attach_flag = 1; |
6c95b8df | 1910 | |
bb00b29d | 1911 | darwin_attach_pid (inf); |
a80b95ba | 1912 | |
bb00b29d | 1913 | darwin_suspend_inferior (inf); |
a80b95ba | 1914 | |
bb00b29d | 1915 | darwin_init_thread_list (inf); |
a80b95ba | 1916 | |
089354bb SM |
1917 | darwin_inferior *priv = get_darwin_inferior (inf); |
1918 | ||
cc6bcb54 | 1919 | darwin_check_osabi (priv, inferior_ptid.tid ()); |
a80b95ba | 1920 | |
726ce67c JB |
1921 | darwin_setup_fake_stop_event (inf); |
1922 | ||
089354bb | 1923 | priv->no_ptrace = 1; |
a80b95ba TG |
1924 | } |
1925 | ||
1926 | /* Take a program previously attached to and detaches it. | |
1927 | The program resumes execution and will no longer stop | |
1928 | on signals, etc. We'd better not have left any breakpoints | |
1929 | in the program or it'll die when it hits one. For this | |
1930 | to work, it may be necessary for the process to have been | |
1931 | previously attached. It *might* work if the program was | |
1932 | started via fork. */ | |
f6ac5f3d PA |
1933 | |
1934 | void | |
1935 | darwin_nat_target::detach (inferior *inf, int from_tty) | |
a80b95ba | 1936 | { |
e99b03dc | 1937 | pid_t pid = inferior_ptid.pid (); |
089354bb | 1938 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
1939 | kern_return_t kret; |
1940 | int res; | |
1941 | ||
bb00b29d | 1942 | /* Display message. */ |
0f48b757 | 1943 | target_announce_detach (from_tty); |
a80b95ba | 1944 | |
bb00b29d | 1945 | /* If ptrace() is in use, stop the process. */ |
089354bb | 1946 | if (!priv->no_ptrace) |
bb00b29d | 1947 | darwin_stop_inferior (inf); |
a80b95ba | 1948 | |
089354bb | 1949 | kret = darwin_restore_exception_ports (priv); |
a80b95ba TG |
1950 | MACH_CHECK_ERROR (kret); |
1951 | ||
089354bb | 1952 | if (!priv->no_ptrace) |
a80b95ba | 1953 | { |
bb00b29d TG |
1954 | res = PTRACE (PT_DETACH, inf->pid, 0, 0); |
1955 | if (res != 0) | |
1956 | printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"), | |
1957 | inf->pid, safe_strerror (errno), errno); | |
a80b95ba TG |
1958 | } |
1959 | ||
bb00b29d | 1960 | darwin_reply_to_all_pending_messages (inf); |
a80b95ba | 1961 | |
5e9bc145 JB |
1962 | /* When using ptrace, we have just performed a PT_DETACH, which |
1963 | resumes the inferior. On the other hand, when we are not using | |
1964 | ptrace, we need to resume its execution ourselves. */ | |
089354bb | 1965 | if (priv->no_ptrace) |
5e9bc145 | 1966 | darwin_resume_inferior (inf); |
a80b95ba | 1967 | |
f6ac5f3d | 1968 | mourn_inferior (); |
a80b95ba TG |
1969 | } |
1970 | ||
f6ac5f3d PA |
1971 | const char * |
1972 | darwin_nat_target::pid_to_str (ptid_t ptid) | |
a80b95ba | 1973 | { |
bb00b29d | 1974 | static char buf[80]; |
cc6bcb54 | 1975 | long tid = ptid.tid (); |
bb00b29d TG |
1976 | |
1977 | if (tid != 0) | |
1978 | { | |
1979 | snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"), | |
e99b03dc | 1980 | tid, ptid.pid ()); |
bb00b29d TG |
1981 | return buf; |
1982 | } | |
a80b95ba | 1983 | |
bb00b29d | 1984 | return normal_pid_to_str (ptid); |
a80b95ba TG |
1985 | } |
1986 | ||
57810aa7 | 1987 | bool |
f6ac5f3d | 1988 | darwin_nat_target::thread_alive (ptid_t ptid) |
a80b95ba | 1989 | { |
57810aa7 | 1990 | return true; |
a80b95ba TG |
1991 | } |
1992 | ||
1993 | /* If RDADDR is not NULL, read inferior task's LEN bytes from ADDR and | |
1994 | copy it to RDADDR in gdb's address space. | |
1995 | If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it | |
1996 | to ADDR in inferior task's address space. | |
f00c55f8 | 1997 | Return 0 on failure; number of bytes read / writen otherwise. */ |
3eb831e0 | 1998 | |
a80b95ba TG |
1999 | static int |
2000 | darwin_read_write_inferior (task_t task, CORE_ADDR addr, | |
b9dd1947 | 2001 | gdb_byte *rdaddr, const gdb_byte *wraddr, |
b55e14c7 | 2002 | ULONGEST length) |
a80b95ba | 2003 | { |
bb00b29d | 2004 | kern_return_t kret; |
3eb831e0 | 2005 | mach_vm_size_t res_length = 0; |
a80b95ba | 2006 | pointer_t copied; |
b9dd1947 | 2007 | mach_msg_type_number_t copy_count; |
a80b95ba TG |
2008 | mach_vm_size_t remaining_length; |
2009 | mach_vm_address_t region_address; | |
2010 | mach_vm_size_t region_length; | |
2011 | ||
b55e14c7 YQ |
2012 | inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"), |
2013 | task, core_addr_to_string (addr), pulongest (length)); | |
bb00b29d | 2014 | |
3eb831e0 TG |
2015 | /* First read. */ |
2016 | if (rdaddr != NULL) | |
a80b95ba | 2017 | { |
3eb831e0 | 2018 | mach_vm_size_t count; |
a80b95ba | 2019 | |
3eb831e0 TG |
2020 | /* According to target.h(to_xfer_partial), one and only one may be |
2021 | non-null. */ | |
2022 | gdb_assert (wraddr == NULL); | |
a80b95ba | 2023 | |
3eb831e0 TG |
2024 | kret = mach_vm_read_overwrite (task, addr, length, |
2025 | (mach_vm_address_t) rdaddr, &count); | |
2026 | if (kret != KERN_SUCCESS) | |
2027 | { | |
2028 | inferior_debug | |
2029 | (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"), | |
2030 | core_addr_to_string (addr), mach_error_string (kret)); | |
2031 | return 0; | |
2032 | } | |
2033 | return count; | |
2034 | } | |
a80b95ba | 2035 | |
3eb831e0 TG |
2036 | /* See above. */ |
2037 | gdb_assert (wraddr != NULL); | |
a80b95ba | 2038 | |
3eb831e0 | 2039 | while (length != 0) |
a80b95ba | 2040 | { |
3eb831e0 TG |
2041 | mach_vm_address_t offset = addr & (mach_page_size - 1); |
2042 | mach_vm_address_t region_address = (mach_vm_address_t) (addr - offset); | |
2043 | mach_vm_size_t aligned_length = | |
2044 | (mach_vm_size_t) PAGE_ROUND (offset + length); | |
bb00b29d | 2045 | vm_region_submap_short_info_data_64_t info; |
3eb831e0 TG |
2046 | mach_msg_type_number_t count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64; |
2047 | natural_t region_depth = 1000; | |
bb00b29d | 2048 | mach_vm_address_t region_start = region_address; |
3eb831e0 TG |
2049 | mach_vm_size_t region_length; |
2050 | mach_vm_size_t write_length; | |
bb00b29d | 2051 | |
3eb831e0 | 2052 | /* Read page protection. */ |
bb00b29d TG |
2053 | kret = mach_vm_region_recurse |
2054 | (task, ®ion_start, ®ion_length, ®ion_depth, | |
2055 | (vm_region_recurse_info_t) &info, &count); | |
2056 | ||
2057 | if (kret != KERN_SUCCESS) | |
a80b95ba | 2058 | { |
bb00b29d TG |
2059 | inferior_debug (1, _("darwin_read_write_inferior: " |
2060 | "mach_vm_region_recurse failed at %s: %s\n"), | |
2061 | core_addr_to_string (region_address), | |
2062 | mach_error_string (kret)); | |
3eb831e0 | 2063 | return res_length; |
a80b95ba TG |
2064 | } |
2065 | ||
bb00b29d TG |
2066 | inferior_debug |
2067 | (9, _("darwin_read_write_inferior: " | |
2068 | "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"), | |
2069 | core_addr_to_string (region_address), | |
2070 | core_addr_to_string (region_start), | |
2071 | core_addr_to_string (region_length)); | |
2072 | ||
0963b4bd | 2073 | /* Check for holes in memory. */ |
bb00b29d | 2074 | if (region_start > region_address) |
a80b95ba | 2075 | { |
0963b4bd | 2076 | warning (_("No memory at %s (vs %s+0x%x). Nothing written"), |
a80b95ba | 2077 | core_addr_to_string (region_address), |
bb00b29d | 2078 | core_addr_to_string (region_start), |
a80b95ba | 2079 | (unsigned)region_length); |
3eb831e0 | 2080 | return res_length; |
a80b95ba TG |
2081 | } |
2082 | ||
bb00b29d TG |
2083 | /* Adjust the length. */ |
2084 | region_length -= (region_address - region_start); | |
3eb831e0 TG |
2085 | if (region_length > aligned_length) |
2086 | region_length = aligned_length; | |
bb00b29d | 2087 | |
3eb831e0 TG |
2088 | /* Make the pages RW. */ |
2089 | if (!(info.protection & VM_PROT_WRITE)) | |
a80b95ba | 2090 | { |
3eb831e0 TG |
2091 | vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE; |
2092 | ||
2093 | kret = mach_vm_protect (task, region_address, region_length, | |
2094 | FALSE, prot); | |
bb00b29d TG |
2095 | if (kret != KERN_SUCCESS) |
2096 | { | |
3eb831e0 TG |
2097 | prot |= VM_PROT_COPY; |
2098 | kret = mach_vm_protect (task, region_address, region_length, | |
2099 | FALSE, prot); | |
2100 | } | |
2101 | if (kret != KERN_SUCCESS) | |
2102 | { | |
2103 | warning (_("darwin_read_write_inferior: " | |
2104 | "mach_vm_protect failed at %s " | |
2105 | "(len=0x%lx, prot=0x%x): %s"), | |
bb00b29d | 2106 | core_addr_to_string (region_address), |
3eb831e0 | 2107 | (unsigned long) region_length, (unsigned) prot, |
bb00b29d | 2108 | mach_error_string (kret)); |
3eb831e0 | 2109 | return res_length; |
bb00b29d | 2110 | } |
a80b95ba TG |
2111 | } |
2112 | ||
3eb831e0 TG |
2113 | if (offset + length > region_length) |
2114 | write_length = region_length - offset; | |
2115 | else | |
2116 | write_length = length; | |
2117 | ||
2118 | /* Write. */ | |
2119 | kret = mach_vm_write (task, addr, (vm_offset_t) wraddr, write_length); | |
2120 | if (kret != KERN_SUCCESS) | |
2121 | { | |
2122 | warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"), | |
2123 | mach_error_string (kret)); | |
2124 | return res_length; | |
2125 | } | |
2126 | ||
2127 | /* Restore page rights. */ | |
a80b95ba TG |
2128 | if (!(info.protection & VM_PROT_WRITE)) |
2129 | { | |
bb00b29d | 2130 | kret = mach_vm_protect (task, region_address, region_length, |
3eb831e0 | 2131 | FALSE, info.protection); |
bb00b29d | 2132 | if (kret != KERN_SUCCESS) |
a80b95ba | 2133 | { |
3eb831e0 TG |
2134 | warning (_("darwin_read_write_inferior: " |
2135 | "mach_vm_protect restore failed at %s " | |
2136 | "(len=0x%lx): %s"), | |
bb00b29d | 2137 | core_addr_to_string (region_address), |
3eb831e0 TG |
2138 | (unsigned long) region_length, |
2139 | mach_error_string (kret)); | |
a80b95ba TG |
2140 | } |
2141 | } | |
a80b95ba | 2142 | |
3eb831e0 TG |
2143 | addr += write_length; |
2144 | wraddr += write_length; | |
2145 | res_length += write_length; | |
2146 | length -= write_length; | |
a80b95ba | 2147 | } |
3eb831e0 TG |
2148 | |
2149 | return res_length; | |
a80b95ba TG |
2150 | } |
2151 | ||
f00c55f8 | 2152 | /* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them |
ad2073b0 | 2153 | to RDADDR (in big endian). |
569283d4 | 2154 | Return 0 on failure; number of bytes read / written otherwise. */ |
f00c55f8 | 2155 | |
b967eb24 | 2156 | #ifdef TASK_DYLD_INFO_COUNT |
569283d4 | 2157 | /* This is not available in Darwin 9. */ |
9b409511 | 2158 | static enum target_xfer_status |
b9dd1947 | 2159 | darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr, |
9b409511 | 2160 | ULONGEST length, ULONGEST *xfered_len) |
f00c55f8 TG |
2161 | { |
2162 | struct task_dyld_info task_dyld_info; | |
2163 | mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; | |
2164 | int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t); | |
2165 | kern_return_t kret; | |
2166 | ||
ad2073b0 | 2167 | if (addr != 0 || length > sizeof (mach_vm_address_t)) |
9b409511 | 2168 | return TARGET_XFER_EOF; |
f00c55f8 | 2169 | |
ad2073b0 TG |
2170 | kret = task_info (task, TASK_DYLD_INFO, |
2171 | (task_info_t) &task_dyld_info, &count); | |
f00c55f8 TG |
2172 | MACH_CHECK_ERROR (kret); |
2173 | if (kret != KERN_SUCCESS) | |
2ed4b548 | 2174 | return TARGET_XFER_E_IO; |
ad2073b0 TG |
2175 | |
2176 | store_unsigned_integer (rdaddr, length, BFD_ENDIAN_BIG, | |
2177 | task_dyld_info.all_image_info_addr); | |
9b409511 YQ |
2178 | *xfered_len = (ULONGEST) length; |
2179 | return TARGET_XFER_OK; | |
f00c55f8 | 2180 | } |
569283d4 | 2181 | #endif |
f00c55f8 | 2182 | |
a80b95ba | 2183 | \f |
a80b95ba | 2184 | |
f6ac5f3d PA |
2185 | enum target_xfer_status |
2186 | darwin_nat_target::xfer_partial (enum target_object object, const char *annex, | |
2187 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
2188 | ULONGEST offset, ULONGEST len, | |
2189 | ULONGEST *xfered_len) | |
a80b95ba | 2190 | { |
bb00b29d | 2191 | struct inferior *inf = current_inferior (); |
089354bb | 2192 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2193 | |
2194 | inferior_debug | |
b55e14c7 YQ |
2195 | (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"), |
2196 | core_addr_to_string (offset), pulongest (len), | |
854f4b0e TG |
2197 | host_address_to_string (readbuf), host_address_to_string (writebuf), |
2198 | inf->pid); | |
a80b95ba | 2199 | |
f00c55f8 TG |
2200 | switch (object) |
2201 | { | |
2202 | case TARGET_OBJECT_MEMORY: | |
9b409511 | 2203 | { |
089354bb | 2204 | int l = darwin_read_write_inferior (priv->task, offset, |
9b409511 YQ |
2205 | readbuf, writebuf, len); |
2206 | ||
2207 | if (l == 0) | |
2208 | return TARGET_XFER_EOF; | |
2209 | else | |
2210 | { | |
2211 | gdb_assert (l > 0); | |
2212 | *xfered_len = (ULONGEST) l; | |
2213 | return TARGET_XFER_OK; | |
2214 | } | |
2215 | } | |
569283d4 | 2216 | #ifdef TASK_DYLD_INFO_COUNT |
f00c55f8 TG |
2217 | case TARGET_OBJECT_DARWIN_DYLD_INFO: |
2218 | if (writebuf != NULL || readbuf == NULL) | |
2219 | { | |
2220 | /* Support only read. */ | |
2ed4b548 | 2221 | return TARGET_XFER_E_IO; |
f00c55f8 | 2222 | } |
089354bb | 2223 | return darwin_read_dyld_info (priv->task, offset, readbuf, len, |
9b409511 | 2224 | xfered_len); |
569283d4 | 2225 | #endif |
f00c55f8 | 2226 | default: |
2ed4b548 | 2227 | return TARGET_XFER_E_IO; |
f00c55f8 | 2228 | } |
a80b95ba | 2229 | |
a80b95ba TG |
2230 | } |
2231 | ||
2232 | static void | |
0fc76421 | 2233 | set_enable_mach_exceptions (const char *args, int from_tty, |
a80b95ba TG |
2234 | struct cmd_list_element *c) |
2235 | { | |
d7e15655 | 2236 | if (inferior_ptid != null_ptid) |
a80b95ba | 2237 | { |
bb00b29d | 2238 | struct inferior *inf = current_inferior (); |
089354bb | 2239 | darwin_inferior *priv = get_darwin_inferior (inf); |
a80b95ba TG |
2240 | exception_mask_t mask; |
2241 | kern_return_t kret; | |
2242 | ||
2243 | if (enable_mach_exceptions) | |
2244 | mask = EXC_MASK_ALL; | |
2245 | else | |
2246 | { | |
089354bb | 2247 | darwin_restore_exception_ports (priv); |
bb00b29d | 2248 | mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT; |
a80b95ba | 2249 | } |
089354bb | 2250 | kret = task_set_exception_ports (priv->task, mask, darwin_ex_port, |
a80b95ba TG |
2251 | EXCEPTION_DEFAULT, THREAD_STATE_NONE); |
2252 | MACH_CHECK_ERROR (kret); | |
2253 | } | |
2254 | } | |
2255 | ||
f6ac5f3d PA |
2256 | char * |
2257 | darwin_nat_target::pid_to_exec_file (int pid) | |
bb00b29d | 2258 | { |
b4ab256d | 2259 | static char path[PATH_MAX]; |
bb00b29d TG |
2260 | int res; |
2261 | ||
d8d2a3ee | 2262 | res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX); |
bb00b29d TG |
2263 | if (res >= 0) |
2264 | return path; | |
2265 | else | |
2266 | return NULL; | |
2267 | } | |
2268 | ||
f6ac5f3d PA |
2269 | ptid_t |
2270 | darwin_nat_target::get_ada_task_ptid (long lwp, long thread) | |
bb00b29d | 2271 | { |
bb00b29d | 2272 | struct inferior *inf = current_inferior (); |
089354bb | 2273 | darwin_inferior *priv = get_darwin_inferior (inf); |
bb00b29d TG |
2274 | kern_return_t kret; |
2275 | mach_port_name_array_t names; | |
2276 | mach_msg_type_number_t names_count; | |
2277 | mach_port_type_array_t types; | |
2278 | mach_msg_type_number_t types_count; | |
2279 | long res = 0; | |
2280 | ||
2281 | /* First linear search. */ | |
089354bb SM |
2282 | for (darwin_thread_t *t : priv->threads) |
2283 | { | |
2284 | if (t->inf_port == lwp) | |
e99b03dc | 2285 | return ptid_t (inferior_ptid.pid (), 0, t->gdb_port); |
089354bb | 2286 | } |
bb00b29d TG |
2287 | |
2288 | /* Maybe the port was never extract. Do it now. */ | |
2289 | ||
2290 | /* First get inferior port names. */ | |
089354bb | 2291 | kret = mach_port_names (priv->task, &names, &names_count, &types, |
bb00b29d TG |
2292 | &types_count); |
2293 | MACH_CHECK_ERROR (kret); | |
2294 | if (kret != KERN_SUCCESS) | |
2295 | return null_ptid; | |
2296 | ||
2297 | /* For each name, copy the right in the gdb space and then compare with | |
2298 | our view of the inferior threads. We don't forget to deallocate the | |
2299 | right. */ | |
089354bb | 2300 | for (int i = 0; i < names_count; i++) |
bb00b29d TG |
2301 | { |
2302 | mach_port_t local_name; | |
2303 | mach_msg_type_name_t local_type; | |
2304 | ||
2305 | /* We just need to know the corresponding name in gdb name space. | |
2306 | So extract and deallocate the right. */ | |
089354bb | 2307 | kret = mach_port_extract_right (priv->task, names[i], |
bb00b29d TG |
2308 | MACH_MSG_TYPE_COPY_SEND, |
2309 | &local_name, &local_type); | |
2310 | if (kret != KERN_SUCCESS) | |
2311 | continue; | |
2312 | mach_port_deallocate (gdb_task, local_name); | |
2313 | ||
089354bb SM |
2314 | for (darwin_thread_t *t : priv->threads) |
2315 | { | |
2316 | if (t->gdb_port == local_name) | |
2317 | { | |
2318 | t->inf_port = names[i]; | |
2319 | if (names[i] == lwp) | |
2320 | res = t->gdb_port; | |
2321 | } | |
2322 | } | |
bb00b29d TG |
2323 | } |
2324 | ||
2325 | vm_deallocate (gdb_task, (vm_address_t) names, | |
2326 | names_count * sizeof (mach_port_t)); | |
2327 | ||
2328 | if (res) | |
e99b03dc | 2329 | return ptid_t (inferior_ptid.pid (), 0, res); |
bb00b29d TG |
2330 | else |
2331 | return null_ptid; | |
2332 | } | |
2333 | ||
57810aa7 | 2334 | bool |
f6ac5f3d | 2335 | darwin_nat_target::supports_multi_process () |
bb00b29d | 2336 | { |
57810aa7 | 2337 | return true; |
bb00b29d TG |
2338 | } |
2339 | ||
a80b95ba | 2340 | void |
f6ac5f3d | 2341 | _initialize_darwin_nat () |
a80b95ba TG |
2342 | { |
2343 | kern_return_t kret; | |
2344 | ||
a80b95ba TG |
2345 | gdb_task = mach_task_self (); |
2346 | darwin_host_self = mach_host_self (); | |
2347 | ||
2348 | /* Read page size. */ | |
2349 | kret = host_page_size (darwin_host_self, &mach_page_size); | |
2350 | if (kret != KERN_SUCCESS) | |
2351 | { | |
2352 | mach_page_size = 0x1000; | |
2353 | MACH_CHECK_ERROR (kret); | |
2354 | } | |
2355 | ||
3eb831e0 TG |
2356 | inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), |
2357 | (unsigned long) mach_task_self (), getpid ()); | |
a80b95ba | 2358 | |
ccce17b0 YQ |
2359 | add_setshow_zuinteger_cmd ("darwin", class_obscure, |
2360 | &darwin_debug_flag, _("\ | |
a80b95ba TG |
2361 | Set if printing inferior communication debugging statements."), _("\ |
2362 | Show if printing inferior communication debugging statements."), NULL, | |
ccce17b0 YQ |
2363 | NULL, NULL, |
2364 | &setdebuglist, &showdebuglist); | |
a80b95ba TG |
2365 | |
2366 | add_setshow_boolean_cmd ("mach-exceptions", class_support, | |
2367 | &enable_mach_exceptions, _("\ | |
2368 | Set if mach exceptions are caught."), _("\ | |
2369 | Show if mach exceptions are caught."), _("\ | |
2370 | When this mode is on, all low level exceptions are reported before being\n\ | |
2371 | reported by the kernel."), | |
2372 | &set_enable_mach_exceptions, NULL, | |
2373 | &setlist, &showlist); | |
2374 | } |