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eee22bf8 MK |
1 | /* Low-level child interface to ttrace. |
2 | ||
6aba47ca | 3 | Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
eee22bf8 MK |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
eee22bf8 MK |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
eee22bf8 MK |
19 | |
20 | #include "defs.h" | |
21 | ||
22 | /* The ttrace(2) system call didn't exist before HP-UX 10.30. Don't | |
23 | try to compile this code unless we have it. */ | |
24 | #ifdef HAVE_TTRACE | |
25 | ||
26 | #include "command.h" | |
27 | #include "gdbcore.h" | |
a7be7fa8 | 28 | #include "gdbthread.h" |
eee22bf8 | 29 | #include "inferior.h" |
eee22bf8 MK |
30 | #include "target.h" |
31 | ||
32 | #include "gdb_assert.h" | |
33 | #include "gdb_string.h" | |
932936f0 | 34 | #include <sys/mman.h> |
eee22bf8 MK |
35 | #include <sys/ttrace.h> |
36 | ||
37 | #include "inf-child.h" | |
38 | #include "inf-ttrace.h" | |
39 | ||
40 | /* HACK: Save the ttrace ops returned by inf_ttrace_target. */ | |
41 | static struct target_ops *ttrace_ops_hack; | |
932936f0 MK |
42 | \f |
43 | ||
a7be7fa8 MK |
44 | /* HP-UX uses a threading model where each user-space thread |
45 | corresponds to a kernel thread. These kernel threads are called | |
46 | lwps. The ttrace(2) interface gives us almost full control over | |
47 | the threads, which makes it very easy to support them in GDB. We | |
48 | identify the threads by process ID and lwp ID. The ttrace(2) also | |
49 | provides us with a thread's user ID (in the `tts_user_tid' member | |
50 | of `ttstate_t') but we don't use that (yet) as it isn't necessary | |
51 | to uniquely label the thread. */ | |
52 | ||
53 | /* Number of active lwps. */ | |
54 | static int inf_ttrace_num_lwps; | |
55 | \f | |
56 | ||
932936f0 MK |
57 | /* On HP-UX versions that have the ttrace(2) system call, we can |
58 | implement "hardware" watchpoints by fiddling with the protection of | |
59 | pages in the address space that contain the variable being watched. | |
60 | In order to implement this, we keep a dictionary of pages for which | |
61 | we have changed the protection. */ | |
62 | ||
63 | struct inf_ttrace_page | |
64 | { | |
65 | CORE_ADDR addr; /* Page address. */ | |
66 | int prot; /* Protection. */ | |
67 | int refcount; /* Reference count. */ | |
68 | struct inf_ttrace_page *next; | |
69 | struct inf_ttrace_page *prev; | |
70 | }; | |
71 | ||
72 | struct inf_ttrace_page_dict | |
73 | { | |
74 | struct inf_ttrace_page buckets[128]; | |
75 | int pagesize; /* Page size. */ | |
76 | int count; /* Number of pages in this dictionary. */ | |
77 | } inf_ttrace_page_dict; | |
78 | ||
a7be7fa8 MK |
79 | /* Number of lwps that are currently in a system call. */ |
80 | static int inf_ttrace_num_lwps_in_syscall; | |
932936f0 MK |
81 | |
82 | /* Flag to indicate whether we should re-enable page protections after | |
83 | the next wait. */ | |
84 | static int inf_ttrace_reenable_page_protections; | |
85 | ||
86 | /* Enable system call events for process PID. */ | |
87 | ||
88 | static void | |
89 | inf_ttrace_enable_syscall_events (pid_t pid) | |
90 | { | |
91 | ttevent_t tte; | |
92 | ttstate_t tts; | |
93 | ||
a7be7fa8 | 94 | gdb_assert (inf_ttrace_num_lwps_in_syscall == 0); |
932936f0 MK |
95 | |
96 | if (ttrace (TT_PROC_GET_EVENT_MASK, pid, 0, | |
97 | (uintptr_t)&tte, sizeof tte, 0) == -1) | |
e2e0b3e5 | 98 | perror_with_name (("ttrace")); |
932936f0 MK |
99 | |
100 | tte.tte_events |= (TTEVT_SYSCALL_ENTRY | TTEVT_SYSCALL_RETURN); | |
101 | ||
102 | if (ttrace (TT_PROC_SET_EVENT_MASK, pid, 0, | |
103 | (uintptr_t)&tte, sizeof tte, 0) == -1) | |
e2e0b3e5 | 104 | perror_with_name (("ttrace")); |
932936f0 MK |
105 | |
106 | if (ttrace (TT_PROC_GET_FIRST_LWP_STATE, pid, 0, | |
107 | (uintptr_t)&tts, sizeof tts, 0) == -1) | |
e2e0b3e5 | 108 | perror_with_name (("ttrace")); |
932936f0 MK |
109 | |
110 | if (tts.tts_flags & TTS_INSYSCALL) | |
a7be7fa8 | 111 | inf_ttrace_num_lwps_in_syscall++; |
932936f0 MK |
112 | |
113 | /* FIXME: Handle multiple threads. */ | |
114 | } | |
115 | ||
116 | /* Disable system call events for process PID. */ | |
117 | ||
118 | static void | |
119 | inf_ttrace_disable_syscall_events (pid_t pid) | |
120 | { | |
121 | ttevent_t tte; | |
122 | ||
123 | gdb_assert (inf_ttrace_page_dict.count == 0); | |
124 | ||
125 | if (ttrace (TT_PROC_GET_EVENT_MASK, pid, 0, | |
126 | (uintptr_t)&tte, sizeof tte, 0) == -1) | |
e2e0b3e5 | 127 | perror_with_name (("ttrace")); |
932936f0 MK |
128 | |
129 | tte.tte_events &= ~(TTEVT_SYSCALL_ENTRY | TTEVT_SYSCALL_RETURN); | |
130 | ||
131 | if (ttrace (TT_PROC_SET_EVENT_MASK, pid, 0, | |
132 | (uintptr_t)&tte, sizeof tte, 0) == -1) | |
e2e0b3e5 | 133 | perror_with_name (("ttrace")); |
932936f0 | 134 | |
a7be7fa8 | 135 | inf_ttrace_num_lwps_in_syscall = 0; |
932936f0 MK |
136 | } |
137 | ||
138 | /* Get information about the page at address ADDR for process PID from | |
139 | the dictionary. */ | |
140 | ||
141 | static struct inf_ttrace_page * | |
142 | inf_ttrace_get_page (pid_t pid, CORE_ADDR addr) | |
143 | { | |
144 | const int num_buckets = ARRAY_SIZE (inf_ttrace_page_dict.buckets); | |
145 | const int pagesize = inf_ttrace_page_dict.pagesize; | |
146 | int bucket; | |
147 | struct inf_ttrace_page *page; | |
148 | ||
149 | bucket = (addr / pagesize) % num_buckets; | |
150 | page = &inf_ttrace_page_dict.buckets[bucket]; | |
151 | while (page) | |
152 | { | |
153 | if (page->addr == addr) | |
154 | break; | |
155 | ||
156 | page = page->next; | |
157 | } | |
158 | ||
159 | return page; | |
160 | } | |
161 | ||
162 | /* Add the page at address ADDR for process PID to the dictionary. */ | |
163 | ||
164 | static struct inf_ttrace_page * | |
165 | inf_ttrace_add_page (pid_t pid, CORE_ADDR addr) | |
166 | { | |
167 | const int num_buckets = ARRAY_SIZE (inf_ttrace_page_dict.buckets); | |
168 | const int pagesize = inf_ttrace_page_dict.pagesize; | |
169 | int bucket; | |
170 | struct inf_ttrace_page *page; | |
171 | struct inf_ttrace_page *prev = NULL; | |
172 | ||
173 | bucket = (addr / pagesize) % num_buckets; | |
174 | page = &inf_ttrace_page_dict.buckets[bucket]; | |
175 | while (page) | |
176 | { | |
177 | if (page->addr == addr) | |
178 | break; | |
179 | ||
180 | prev = page; | |
181 | page = page->next; | |
182 | } | |
183 | ||
184 | if (!page) | |
185 | { | |
186 | int prot; | |
187 | ||
188 | if (ttrace (TT_PROC_GET_MPROTECT, pid, 0, | |
189 | addr, 0, (uintptr_t)&prot) == -1) | |
e2e0b3e5 | 190 | perror_with_name (("ttrace")); |
932936f0 MK |
191 | |
192 | page = XMALLOC (struct inf_ttrace_page); | |
193 | page->addr = addr; | |
194 | page->prot = prot; | |
195 | page->refcount = 0; | |
196 | page->next = NULL; | |
197 | ||
198 | page->prev = prev; | |
199 | prev->next = page; | |
200 | ||
201 | inf_ttrace_page_dict.count++; | |
202 | if (inf_ttrace_page_dict.count == 1) | |
203 | inf_ttrace_enable_syscall_events (pid); | |
204 | ||
a7be7fa8 | 205 | if (inf_ttrace_num_lwps_in_syscall == 0) |
932936f0 MK |
206 | { |
207 | if (ttrace (TT_PROC_SET_MPROTECT, pid, 0, | |
208 | addr, pagesize, prot & ~PROT_WRITE) == -1) | |
e2e0b3e5 | 209 | perror_with_name (("ttrace")); |
932936f0 MK |
210 | } |
211 | } | |
212 | ||
213 | return page; | |
214 | } | |
215 | ||
216 | /* Insert the page at address ADDR of process PID to the dictionary. */ | |
217 | ||
218 | static void | |
219 | inf_ttrace_insert_page (pid_t pid, CORE_ADDR addr) | |
220 | { | |
221 | struct inf_ttrace_page *page; | |
222 | ||
223 | page = inf_ttrace_get_page (pid, addr); | |
224 | if (!page) | |
225 | page = inf_ttrace_add_page (pid, addr); | |
226 | ||
227 | page->refcount++; | |
228 | } | |
229 | ||
230 | /* Remove the page at address ADDR of process PID from the dictionary. */ | |
231 | ||
232 | static void | |
233 | inf_ttrace_remove_page (pid_t pid, CORE_ADDR addr) | |
234 | { | |
235 | const int pagesize = inf_ttrace_page_dict.pagesize; | |
236 | struct inf_ttrace_page *page; | |
237 | ||
238 | page = inf_ttrace_get_page (pid, addr); | |
239 | page->refcount--; | |
240 | ||
241 | gdb_assert (page->refcount >= 0); | |
242 | ||
243 | if (page->refcount == 0) | |
244 | { | |
a7be7fa8 | 245 | if (inf_ttrace_num_lwps_in_syscall == 0) |
932936f0 MK |
246 | { |
247 | if (ttrace (TT_PROC_SET_MPROTECT, pid, 0, | |
248 | addr, pagesize, page->prot) == -1) | |
e2e0b3e5 | 249 | perror_with_name (("ttrace")); |
932936f0 MK |
250 | } |
251 | ||
252 | inf_ttrace_page_dict.count--; | |
253 | if (inf_ttrace_page_dict.count == 0) | |
254 | inf_ttrace_disable_syscall_events (pid); | |
255 | ||
256 | page->prev->next = page->next; | |
257 | if (page->next) | |
258 | page->next->prev = page->prev; | |
259 | ||
260 | xfree (page); | |
261 | } | |
262 | } | |
263 | ||
264 | /* Mask the bits in PROT from the page protections that are currently | |
265 | in the dictionary for process PID. */ | |
266 | ||
267 | static void | |
268 | inf_ttrace_mask_page_protections (pid_t pid, int prot) | |
269 | { | |
270 | const int num_buckets = ARRAY_SIZE (inf_ttrace_page_dict.buckets); | |
271 | const int pagesize = inf_ttrace_page_dict.pagesize; | |
272 | int bucket; | |
273 | ||
274 | for (bucket = 0; bucket < num_buckets; bucket++) | |
275 | { | |
276 | struct inf_ttrace_page *page; | |
277 | ||
278 | page = inf_ttrace_page_dict.buckets[bucket].next; | |
279 | while (page) | |
280 | { | |
281 | if (ttrace (TT_PROC_SET_MPROTECT, pid, 0, | |
282 | page->addr, pagesize, page->prot & ~prot) == -1) | |
e2e0b3e5 | 283 | perror_with_name (("ttrace")); |
932936f0 MK |
284 | |
285 | page = page->next; | |
286 | } | |
287 | } | |
288 | } | |
289 | ||
290 | /* Write-protect the pages in the dictionary for process PID. */ | |
291 | ||
292 | static void | |
293 | inf_ttrace_enable_page_protections (pid_t pid) | |
294 | { | |
295 | inf_ttrace_mask_page_protections (pid, PROT_WRITE); | |
296 | } | |
297 | ||
298 | /* Restore the protection of the pages in the dictionary for process | |
299 | PID. */ | |
300 | ||
301 | static void | |
302 | inf_ttrace_disable_page_protections (pid_t pid) | |
303 | { | |
304 | inf_ttrace_mask_page_protections (pid, 0); | |
305 | } | |
306 | ||
307 | /* Insert a "hardware" watchpoint for LEN bytes at address ADDR of | |
308 | type TYPE. */ | |
309 | ||
310 | static int | |
311 | inf_ttrace_insert_watchpoint (CORE_ADDR addr, int len, int type) | |
312 | { | |
313 | const int pagesize = inf_ttrace_page_dict.pagesize; | |
314 | pid_t pid = ptid_get_pid (inferior_ptid); | |
315 | CORE_ADDR page_addr; | |
316 | int num_pages; | |
317 | int page; | |
318 | ||
319 | gdb_assert (type == hw_write); | |
320 | ||
321 | page_addr = (addr / pagesize) * pagesize; | |
322 | num_pages = (len + pagesize - 1) / pagesize; | |
323 | ||
324 | for (page = 0; page < num_pages; page++, page_addr += pagesize) | |
325 | inf_ttrace_insert_page (pid, page_addr); | |
326 | ||
327 | return 1; | |
328 | } | |
329 | ||
330 | /* Remove a "hardware" watchpoint for LEN bytes at address ADDR of | |
331 | type TYPE. */ | |
332 | ||
333 | static int | |
334 | inf_ttrace_remove_watchpoint (CORE_ADDR addr, int len, int type) | |
335 | { | |
336 | const int pagesize = inf_ttrace_page_dict.pagesize; | |
337 | pid_t pid = ptid_get_pid (inferior_ptid); | |
338 | CORE_ADDR page_addr; | |
339 | int num_pages; | |
340 | int page; | |
341 | ||
342 | gdb_assert (type == hw_write); | |
343 | ||
344 | page_addr = (addr / pagesize) * pagesize; | |
345 | num_pages = (len + pagesize - 1) / pagesize; | |
346 | ||
347 | for (page = 0; page < num_pages; page++, page_addr += pagesize) | |
348 | inf_ttrace_remove_page (pid, page_addr); | |
349 | ||
350 | return 1; | |
351 | } | |
352 | ||
353 | static int | |
354 | inf_ttrace_can_use_hw_breakpoint (int type, int len, int ot) | |
355 | { | |
356 | return (type == bp_hardware_watchpoint); | |
357 | } | |
358 | ||
359 | static int | |
2a3cdf79 | 360 | inf_ttrace_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) |
932936f0 MK |
361 | { |
362 | return 1; | |
363 | } | |
364 | ||
365 | /* Return non-zero if the current inferior was (potentially) stopped | |
366 | by hitting a "hardware" watchpoint. */ | |
367 | ||
368 | static int | |
369 | inf_ttrace_stopped_by_watchpoint (void) | |
370 | { | |
371 | pid_t pid = ptid_get_pid (inferior_ptid); | |
372 | lwpid_t lwpid = ptid_get_lwp (inferior_ptid); | |
373 | ttstate_t tts; | |
374 | ||
375 | if (inf_ttrace_page_dict.count > 0) | |
376 | { | |
377 | if (ttrace (TT_LWP_GET_STATE, pid, lwpid, | |
378 | (uintptr_t)&tts, sizeof tts, 0) == -1) | |
e2e0b3e5 | 379 | perror_with_name (("ttrace")); |
932936f0 MK |
380 | |
381 | if (tts.tts_event == TTEVT_SIGNAL | |
382 | && tts.tts_u.tts_signal.tts_signo == SIGBUS) | |
383 | { | |
384 | const int pagesize = inf_ttrace_page_dict.pagesize; | |
385 | void *addr = tts.tts_u.tts_signal.tts_siginfo.si_addr; | |
386 | CORE_ADDR page_addr = ((uintptr_t)addr / pagesize) * pagesize; | |
387 | ||
388 | if (inf_ttrace_get_page (pid, page_addr)) | |
389 | return 1; | |
390 | } | |
391 | } | |
392 | ||
393 | return 0; | |
394 | } | |
395 | \f | |
eee22bf8 | 396 | |
b2a4db28 MK |
397 | /* When tracking a vfork(2), we cannot detach from the parent until |
398 | after the child has called exec(3) or has exited. If we are still | |
399 | attached to the parent, this variable will be set to the process ID | |
400 | of the parent. Otherwise it will be set to zero. */ | |
401 | static pid_t inf_ttrace_vfork_ppid = -1; | |
402 | ||
403 | static int | |
ee057212 | 404 | inf_ttrace_follow_fork (struct target_ops *ops, int follow_child) |
b2a4db28 MK |
405 | { |
406 | pid_t pid, fpid; | |
407 | lwpid_t lwpid, flwpid; | |
408 | ttstate_t tts; | |
409 | ||
410 | /* FIXME: kettenis/20050720: This stuff should really be passed as | |
411 | an argument by our caller. */ | |
412 | { | |
413 | ptid_t ptid; | |
414 | struct target_waitstatus status; | |
415 | ||
416 | get_last_target_status (&ptid, &status); | |
417 | gdb_assert (status.kind == TARGET_WAITKIND_FORKED | |
418 | || status.kind == TARGET_WAITKIND_VFORKED); | |
419 | ||
420 | pid = ptid_get_pid (ptid); | |
421 | lwpid = ptid_get_lwp (ptid); | |
422 | } | |
423 | ||
424 | /* Get all important details that core GDB doesn't (and shouldn't) | |
425 | know about. */ | |
426 | if (ttrace (TT_LWP_GET_STATE, pid, lwpid, | |
427 | (uintptr_t)&tts, sizeof tts, 0) == -1) | |
428 | perror_with_name (("ttrace")); | |
429 | ||
430 | gdb_assert (tts.tts_event == TTEVT_FORK || tts.tts_event == TTEVT_VFORK); | |
431 | ||
432 | if (tts.tts_u.tts_fork.tts_isparent) | |
433 | { | |
434 | pid = tts.tts_pid; | |
435 | lwpid = tts.tts_lwpid; | |
436 | fpid = tts.tts_u.tts_fork.tts_fpid; | |
437 | flwpid = tts.tts_u.tts_fork.tts_flwpid; | |
438 | } | |
439 | else | |
440 | { | |
441 | pid = tts.tts_u.tts_fork.tts_fpid; | |
442 | lwpid = tts.tts_u.tts_fork.tts_flwpid; | |
443 | fpid = tts.tts_pid; | |
444 | flwpid = tts.tts_lwpid; | |
445 | } | |
446 | ||
447 | if (follow_child) | |
448 | { | |
449 | inferior_ptid = ptid_build (fpid, flwpid, 0); | |
450 | detach_breakpoints (pid); | |
451 | ||
452 | target_terminal_ours (); | |
453 | fprintf_unfiltered (gdb_stdlog, _("\ | |
454 | Attaching after fork to child process %ld.\n"), (long)fpid); | |
455 | } | |
456 | else | |
457 | { | |
458 | inferior_ptid = ptid_build (pid, lwpid, 0); | |
459 | detach_breakpoints (fpid); | |
460 | ||
461 | target_terminal_ours (); | |
462 | fprintf_unfiltered (gdb_stdlog, _("\ | |
463 | Detaching after fork from child process %ld.\n"), (long)fpid); | |
464 | } | |
465 | ||
466 | if (tts.tts_event == TTEVT_VFORK) | |
467 | { | |
468 | gdb_assert (!tts.tts_u.tts_fork.tts_isparent); | |
469 | ||
470 | if (follow_child) | |
471 | { | |
472 | /* We can't detach from the parent yet. */ | |
473 | inf_ttrace_vfork_ppid = pid; | |
474 | ||
475 | reattach_breakpoints (fpid); | |
476 | } | |
477 | else | |
478 | { | |
479 | if (ttrace (TT_PROC_DETACH, fpid, 0, 0, 0, 0) == -1) | |
480 | perror_with_name (("ttrace")); | |
481 | ||
482 | /* Wait till we get the TTEVT_VFORK event in the parent. | |
483 | This indicates that the child has called exec(3) or has | |
484 | exited and that the parent is ready to be traced again. */ | |
485 | if (ttrace_wait (pid, lwpid, TTRACE_WAITOK, &tts, sizeof tts) == -1) | |
486 | perror_with_name (("ttrace_wait")); | |
487 | gdb_assert (tts.tts_event == TTEVT_VFORK); | |
488 | gdb_assert (tts.tts_u.tts_fork.tts_isparent); | |
489 | ||
490 | reattach_breakpoints (pid); | |
491 | } | |
492 | } | |
493 | else | |
494 | { | |
495 | gdb_assert (tts.tts_u.tts_fork.tts_isparent); | |
496 | ||
497 | if (follow_child) | |
498 | { | |
499 | if (ttrace (TT_PROC_DETACH, pid, 0, 0, 0, 0) == -1) | |
500 | perror_with_name (("ttrace")); | |
501 | } | |
502 | else | |
503 | { | |
504 | if (ttrace (TT_PROC_DETACH, fpid, 0, 0, 0, 0) == -1) | |
505 | perror_with_name (("ttrace")); | |
506 | } | |
507 | } | |
508 | ||
509 | if (follow_child) | |
510 | { | |
511 | /* The child will start out single-threaded. */ | |
512 | inf_ttrace_num_lwps = 0; | |
513 | inf_ttrace_num_lwps_in_syscall = 0; | |
514 | ||
515 | /* Reset breakpoints in the child as appropriate. */ | |
516 | follow_inferior_reset_breakpoints (); | |
517 | } | |
518 | ||
519 | return 0; | |
520 | } | |
521 | \f | |
522 | ||
eee22bf8 MK |
523 | /* File descriptors for pipes used as semaphores during initial |
524 | startup of an inferior. */ | |
525 | static int inf_ttrace_pfd1[2]; | |
526 | static int inf_ttrace_pfd2[2]; | |
527 | ||
528 | static void | |
529 | do_cleanup_pfds (void *dummy) | |
530 | { | |
531 | close (inf_ttrace_pfd1[0]); | |
532 | close (inf_ttrace_pfd1[1]); | |
533 | close (inf_ttrace_pfd2[0]); | |
534 | close (inf_ttrace_pfd2[1]); | |
535 | } | |
536 | ||
537 | static void | |
538 | inf_ttrace_prepare (void) | |
539 | { | |
540 | if (pipe (inf_ttrace_pfd1) == -1) | |
a3f17187 | 541 | perror_with_name (("pipe")); |
eee22bf8 MK |
542 | |
543 | if (pipe (inf_ttrace_pfd2) == -1) | |
544 | { | |
545 | close (inf_ttrace_pfd1[0]); | |
546 | close (inf_ttrace_pfd2[0]); | |
a3f17187 | 547 | perror_with_name (("pipe")); |
eee22bf8 MK |
548 | } |
549 | } | |
550 | ||
551 | /* Prepare to be traced. */ | |
552 | ||
553 | static void | |
554 | inf_ttrace_me (void) | |
555 | { | |
556 | struct cleanup *old_chain = make_cleanup (do_cleanup_pfds, 0); | |
557 | char c; | |
558 | ||
559 | /* "Trace me, Dr. Memory!" */ | |
560 | if (ttrace (TT_PROC_SETTRC, 0, 0, 0, TT_VERSION, 0) == -1) | |
e2e0b3e5 | 561 | perror_with_name (("ttrace")); |
eee22bf8 MK |
562 | |
563 | /* Tell our parent that we are ready to be traced. */ | |
564 | if (write (inf_ttrace_pfd1[1], &c, sizeof c) != sizeof c) | |
e2e0b3e5 | 565 | perror_with_name (("write")); |
eee22bf8 MK |
566 | |
567 | /* Wait until our parent has set the initial event mask. */ | |
568 | if (read (inf_ttrace_pfd2[0], &c, sizeof c) != sizeof c) | |
e2e0b3e5 | 569 | perror_with_name (("read")); |
eee22bf8 MK |
570 | |
571 | do_cleanups (old_chain); | |
572 | } | |
573 | ||
574 | /* Start tracing PID. */ | |
575 | ||
576 | static void | |
577 | inf_ttrace_him (int pid) | |
578 | { | |
579 | struct cleanup *old_chain = make_cleanup (do_cleanup_pfds, 0); | |
580 | ttevent_t tte; | |
eee22bf8 MK |
581 | char c; |
582 | ||
583 | /* Wait until our child is ready to be traced. */ | |
584 | if (read (inf_ttrace_pfd1[0], &c, sizeof c) != sizeof c) | |
e2e0b3e5 | 585 | perror_with_name (("read")); |
eee22bf8 MK |
586 | |
587 | /* Set the initial event mask. */ | |
588 | memset (&tte, 0, sizeof (tte)); | |
b2a4db28 | 589 | tte.tte_events |= TTEVT_EXEC | TTEVT_EXIT | TTEVT_FORK | TTEVT_VFORK; |
a7be7fa8 | 590 | tte.tte_events |= TTEVT_LWP_CREATE | TTEVT_LWP_EXIT | TTEVT_LWP_TERMINATE; |
7ba0e0c2 MK |
591 | #ifdef TTEVT_BPT_SSTEP |
592 | tte.tte_events |= TTEVT_BPT_SSTEP; | |
593 | #endif | |
b2a4db28 | 594 | tte.tte_opts |= TTEO_PROC_INHERIT; |
eee22bf8 MK |
595 | if (ttrace (TT_PROC_SET_EVENT_MASK, pid, 0, |
596 | (uintptr_t)&tte, sizeof tte, 0) == -1) | |
e2e0b3e5 | 597 | perror_with_name (("ttrace")); |
eee22bf8 MK |
598 | |
599 | /* Tell our child that we have set the initial event mask. */ | |
600 | if (write (inf_ttrace_pfd2[1], &c, sizeof c) != sizeof c) | |
e2e0b3e5 | 601 | perror_with_name (("write")); |
eee22bf8 MK |
602 | |
603 | do_cleanups (old_chain); | |
604 | ||
605 | push_target (ttrace_ops_hack); | |
606 | ||
607 | /* On some targets, there must be some explicit synchronization | |
608 | between the parent and child processes after the debugger forks, | |
609 | and before the child execs the debuggee program. This call | |
610 | basically gives permission for the child to exec. */ | |
611 | ||
612 | target_acknowledge_created_inferior (pid); | |
613 | ||
614 | /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, and will | |
615 | be 1 or 2 depending on whether we're starting without or with a | |
616 | shell. */ | |
617 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
618 | ||
619 | /* On some targets, there must be some explicit actions taken after | |
620 | the inferior has been started up. */ | |
621 | target_post_startup_inferior (pid_to_ptid (pid)); | |
622 | } | |
623 | ||
624 | static void | |
625 | inf_ttrace_create_inferior (char *exec_file, char *allargs, char **env, | |
626 | int from_tty) | |
627 | { | |
a7be7fa8 MK |
628 | gdb_assert (inf_ttrace_num_lwps == 0); |
629 | gdb_assert (inf_ttrace_num_lwps_in_syscall == 0); | |
932936f0 | 630 | gdb_assert (inf_ttrace_page_dict.count == 0); |
932936f0 | 631 | gdb_assert (inf_ttrace_reenable_page_protections == 0); |
b2a4db28 | 632 | gdb_assert (inf_ttrace_vfork_ppid == -1); |
932936f0 | 633 | |
eee22bf8 MK |
634 | fork_inferior (exec_file, allargs, env, inf_ttrace_me, inf_ttrace_him, |
635 | inf_ttrace_prepare, NULL); | |
eee22bf8 MK |
636 | } |
637 | ||
eee22bf8 MK |
638 | static void |
639 | inf_ttrace_mourn_inferior (void) | |
640 | { | |
932936f0 MK |
641 | const int num_buckets = ARRAY_SIZE (inf_ttrace_page_dict.buckets); |
642 | int bucket; | |
643 | ||
a7be7fa8 MK |
644 | inf_ttrace_num_lwps = 0; |
645 | inf_ttrace_num_lwps_in_syscall = 0; | |
932936f0 MK |
646 | |
647 | for (bucket = 0; bucket < num_buckets; bucket++) | |
648 | { | |
649 | struct inf_ttrace_page *page; | |
650 | struct inf_ttrace_page *next; | |
651 | ||
652 | page = inf_ttrace_page_dict.buckets[bucket].next; | |
653 | while (page) | |
654 | { | |
655 | next = page->next; | |
656 | xfree (page); | |
657 | page = next; | |
658 | } | |
659 | } | |
660 | inf_ttrace_page_dict.count = 0; | |
661 | ||
eee22bf8 MK |
662 | unpush_target (ttrace_ops_hack); |
663 | generic_mourn_inferior (); | |
664 | } | |
665 | ||
666 | static void | |
667 | inf_ttrace_attach (char *args, int from_tty) | |
668 | { | |
669 | char *exec_file; | |
670 | pid_t pid; | |
671 | char *dummy; | |
932936f0 | 672 | ttevent_t tte; |
eee22bf8 MK |
673 | |
674 | if (!args) | |
a3f17187 | 675 | error_no_arg (_("process-id to attach")); |
eee22bf8 MK |
676 | |
677 | dummy = args; | |
678 | pid = strtol (args, &dummy, 0); | |
679 | if (pid == 0 && args == dummy) | |
8a3fe4f8 | 680 | error (_("Illegal process-id: %s."), args); |
eee22bf8 MK |
681 | |
682 | if (pid == getpid ()) /* Trying to masturbate? */ | |
8a3fe4f8 | 683 | error (_("I refuse to debug myself!")); |
eee22bf8 MK |
684 | |
685 | if (from_tty) | |
686 | { | |
346e281c | 687 | exec_file = get_exec_file (0); |
eee22bf8 MK |
688 | |
689 | if (exec_file) | |
a3f17187 | 690 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, |
eee22bf8 MK |
691 | target_pid_to_str (pid_to_ptid (pid))); |
692 | else | |
a3f17187 | 693 | printf_unfiltered (_("Attaching to %s\n"), |
eee22bf8 MK |
694 | target_pid_to_str (pid_to_ptid (pid))); |
695 | ||
696 | gdb_flush (gdb_stdout); | |
697 | } | |
698 | ||
a7be7fa8 MK |
699 | gdb_assert (inf_ttrace_num_lwps == 0); |
700 | gdb_assert (inf_ttrace_num_lwps_in_syscall == 0); | |
b2a4db28 | 701 | gdb_assert (inf_ttrace_vfork_ppid == -1); |
a7be7fa8 | 702 | |
eee22bf8 | 703 | if (ttrace (TT_PROC_ATTACH, pid, 0, TT_KILL_ON_EXIT, TT_VERSION, 0) == -1) |
e2e0b3e5 | 704 | perror_with_name (("ttrace")); |
eee22bf8 MK |
705 | attach_flag = 1; |
706 | ||
932936f0 | 707 | /* Set the initial event mask. */ |
932936f0 | 708 | memset (&tte, 0, sizeof (tte)); |
b2a4db28 | 709 | tte.tte_events |= TTEVT_EXEC | TTEVT_EXIT | TTEVT_FORK | TTEVT_VFORK; |
a7be7fa8 | 710 | tte.tte_events |= TTEVT_LWP_CREATE | TTEVT_LWP_EXIT | TTEVT_LWP_TERMINATE; |
7ba0e0c2 MK |
711 | #ifdef TTEVT_BPT_SSTEP |
712 | tte.tte_events |= TTEVT_BPT_SSTEP; | |
713 | #endif | |
b2a4db28 | 714 | tte.tte_opts |= TTEO_PROC_INHERIT; |
932936f0 MK |
715 | if (ttrace (TT_PROC_SET_EVENT_MASK, pid, 0, |
716 | (uintptr_t)&tte, sizeof tte, 0) == -1) | |
e2e0b3e5 | 717 | perror_with_name (("ttrace")); |
932936f0 | 718 | |
eee22bf8 MK |
719 | inferior_ptid = pid_to_ptid (pid); |
720 | push_target (ttrace_ops_hack); | |
eee22bf8 MK |
721 | } |
722 | ||
723 | static void | |
724 | inf_ttrace_detach (char *args, int from_tty) | |
725 | { | |
eee22bf8 | 726 | pid_t pid = ptid_get_pid (inferior_ptid); |
5d426ff1 | 727 | int sig = 0; |
eee22bf8 MK |
728 | |
729 | if (from_tty) | |
730 | { | |
731 | char *exec_file = get_exec_file (0); | |
732 | if (exec_file == 0) | |
733 | exec_file = ""; | |
a3f17187 | 734 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
eee22bf8 MK |
735 | target_pid_to_str (pid_to_ptid (pid))); |
736 | gdb_flush (gdb_stdout); | |
737 | } | |
738 | if (args) | |
739 | sig = atoi (args); | |
740 | ||
741 | /* ??? The HP-UX 11.0 ttrace(2) manual page doesn't mention that we | |
742 | can pass a signal number here. Does this really work? */ | |
743 | if (ttrace (TT_PROC_DETACH, pid, 0, 0, sig, 0) == -1) | |
e2e0b3e5 | 744 | perror_with_name (("ttrace")); |
eee22bf8 | 745 | |
b2a4db28 MK |
746 | if (inf_ttrace_vfork_ppid != -1) |
747 | { | |
748 | if (ttrace (TT_PROC_DETACH, inf_ttrace_vfork_ppid, 0, 0, 0, 0) == -1) | |
749 | perror_with_name (("ttrace")); | |
750 | inf_ttrace_vfork_ppid = -1; | |
751 | } | |
752 | ||
a7be7fa8 MK |
753 | inf_ttrace_num_lwps = 0; |
754 | inf_ttrace_num_lwps_in_syscall = 0; | |
932936f0 | 755 | |
eee22bf8 | 756 | unpush_target (ttrace_ops_hack); |
932936f0 | 757 | inferior_ptid = null_ptid; |
eee22bf8 MK |
758 | } |
759 | ||
346e281c MK |
760 | static void |
761 | inf_ttrace_kill (void) | |
762 | { | |
763 | pid_t pid = ptid_get_pid (inferior_ptid); | |
764 | ||
765 | if (pid == 0) | |
766 | return; | |
767 | ||
768 | if (ttrace (TT_PROC_EXIT, pid, 0, 0, 0, 0) == -1) | |
769 | perror_with_name (("ttrace")); | |
770 | /* ??? Is it necessary to call ttrace_wait() here? */ | |
771 | ||
772 | if (inf_ttrace_vfork_ppid != -1) | |
773 | { | |
774 | if (ttrace (TT_PROC_DETACH, inf_ttrace_vfork_ppid, 0, 0, 0, 0) == -1) | |
775 | perror_with_name (("ttrace")); | |
776 | inf_ttrace_vfork_ppid = -1; | |
777 | } | |
778 | ||
779 | target_mourn_inferior (); | |
780 | } | |
781 | ||
7ba0e0c2 MK |
782 | static int |
783 | inf_ttrace_resume_callback (struct thread_info *info, void *arg) | |
784 | { | |
785 | if (!ptid_equal (info->ptid, inferior_ptid)) | |
786 | { | |
787 | pid_t pid = ptid_get_pid (info->ptid); | |
788 | lwpid_t lwpid = ptid_get_lwp (info->ptid); | |
789 | ||
790 | if (ttrace (TT_LWP_CONTINUE, pid, lwpid, TT_NOPC, 0, 0) == -1) | |
e2e0b3e5 | 791 | perror_with_name (("ttrace")); |
7ba0e0c2 MK |
792 | } |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
eee22bf8 MK |
797 | static void |
798 | inf_ttrace_resume (ptid_t ptid, int step, enum target_signal signal) | |
799 | { | |
800 | pid_t pid = ptid_get_pid (ptid); | |
801 | lwpid_t lwpid = ptid_get_lwp (ptid); | |
802 | ttreq_t request = step ? TT_LWP_SINGLE : TT_LWP_CONTINUE; | |
803 | int sig = target_signal_to_host (signal); | |
804 | ||
805 | if (pid == -1) | |
806 | { | |
807 | pid = ptid_get_pid (inferior_ptid); | |
808 | lwpid = ptid_get_lwp (inferior_ptid); | |
809 | } | |
810 | ||
811 | if (ttrace (request, pid, lwpid, TT_NOPC, sig, 0) == -1) | |
e2e0b3e5 | 812 | perror_with_name (("ttrace")); |
eee22bf8 | 813 | |
7ba0e0c2 | 814 | if (ptid_equal (ptid, minus_one_ptid) && inf_ttrace_num_lwps > 0) |
eee22bf8 MK |
815 | { |
816 | /* Let all the other threads run too. */ | |
7ba0e0c2 | 817 | iterate_over_threads (inf_ttrace_resume_callback, NULL); |
eee22bf8 MK |
818 | } |
819 | } | |
820 | ||
821 | static ptid_t | |
822 | inf_ttrace_wait (ptid_t ptid, struct target_waitstatus *ourstatus) | |
823 | { | |
824 | pid_t pid = ptid_get_pid (ptid); | |
825 | lwpid_t lwpid = ptid_get_lwp (ptid); | |
826 | ttstate_t tts; | |
827 | ||
932936f0 | 828 | /* Until proven otherwise. */ |
a7be7fa8 | 829 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
eee22bf8 MK |
830 | |
831 | if (pid == -1) | |
b2a4db28 | 832 | pid = lwpid = 0; |
eee22bf8 | 833 | |
b2a4db28 | 834 | gdb_assert (pid != 0 || lwpid == 0); |
eee22bf8 MK |
835 | |
836 | do | |
837 | { | |
838 | set_sigint_trap (); | |
839 | set_sigio_trap (); | |
840 | ||
841 | if (ttrace_wait (pid, lwpid, TTRACE_WAITOK, &tts, sizeof tts) == -1) | |
a3f17187 | 842 | perror_with_name (("ttrace_wait")); |
eee22bf8 | 843 | |
b2a4db28 MK |
844 | if (tts.tts_event == TTEVT_VFORK && tts.tts_u.tts_fork.tts_isparent) |
845 | { | |
846 | if (inf_ttrace_vfork_ppid != -1) | |
847 | { | |
848 | gdb_assert (inf_ttrace_vfork_ppid == tts.tts_pid); | |
849 | ||
850 | if (ttrace (TT_PROC_DETACH, tts.tts_pid, 0, 0, 0, 0) == -1) | |
851 | perror_with_name (("ttrace")); | |
852 | inf_ttrace_vfork_ppid = -1; | |
853 | } | |
854 | ||
855 | tts.tts_event = TTEVT_NONE; | |
856 | } | |
857 | ||
eee22bf8 MK |
858 | clear_sigio_trap (); |
859 | clear_sigint_trap (); | |
860 | } | |
861 | while (tts.tts_event == TTEVT_NONE); | |
862 | ||
932936f0 MK |
863 | /* Now that we've waited, we can re-enable the page protections. */ |
864 | if (inf_ttrace_reenable_page_protections) | |
865 | { | |
a7be7fa8 | 866 | gdb_assert (inf_ttrace_num_lwps_in_syscall == 0); |
932936f0 MK |
867 | inf_ttrace_enable_page_protections (tts.tts_pid); |
868 | inf_ttrace_reenable_page_protections = 0; | |
869 | } | |
870 | ||
a7be7fa8 MK |
871 | ptid = ptid_build (tts.tts_pid, tts.tts_lwpid, 0); |
872 | ||
eee22bf8 MK |
873 | switch (tts.tts_event) |
874 | { | |
7ba0e0c2 MK |
875 | #ifdef TTEVT_BPT_SSTEP |
876 | case TTEVT_BPT_SSTEP: | |
877 | /* Make it look like a breakpoint. */ | |
878 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
879 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; | |
880 | break; | |
881 | #endif | |
882 | ||
eee22bf8 | 883 | case TTEVT_EXEC: |
7c35e3f3 MK |
884 | /* FIXME: kettenis/20051029: GDB doesn't really know how to deal |
885 | with TARGET_WAITKIND_EXECD events yet. So we make it look | |
886 | like a SIGTRAP instead. */ | |
887 | #if 0 | |
5d426ff1 MK |
888 | ourstatus->kind = TARGET_WAITKIND_EXECD; |
889 | ourstatus->value.execd_pathname = | |
890 | xmalloc (tts.tts_u.tts_exec.tts_pathlen + 1); | |
891 | if (ttrace (TT_PROC_GET_PATHNAME, tts.tts_pid, 0, | |
892 | (uintptr_t)ourstatus->value.execd_pathname, | |
893 | tts.tts_u.tts_exec.tts_pathlen, 0) == -1) | |
894 | perror_with_name (("ttrace")); | |
895 | ourstatus->value.execd_pathname[tts.tts_u.tts_exec.tts_pathlen] = 0; | |
7c35e3f3 MK |
896 | #else |
897 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
898 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; | |
899 | #endif | |
eee22bf8 | 900 | break; |
932936f0 | 901 | |
eee22bf8 MK |
902 | case TTEVT_EXIT: |
903 | store_waitstatus (ourstatus, tts.tts_u.tts_exit.tts_exitcode); | |
a7be7fa8 MK |
904 | inf_ttrace_num_lwps = 0; |
905 | break; | |
906 | ||
b2a4db28 MK |
907 | case TTEVT_FORK: |
908 | ourstatus->kind = TARGET_WAITKIND_FORKED; | |
909 | ourstatus->value.related_pid = tts.tts_u.tts_fork.tts_fpid; | |
910 | ||
911 | /* Make sure the other end of the fork is stopped too. */ | |
912 | if (ttrace_wait (tts.tts_u.tts_fork.tts_fpid, | |
913 | tts.tts_u.tts_fork.tts_flwpid, | |
914 | TTRACE_WAITOK, &tts, sizeof tts) == -1) | |
915 | perror_with_name (("ttrace_wait")); | |
916 | ||
917 | gdb_assert (tts.tts_event == TTEVT_FORK); | |
918 | if (tts.tts_u.tts_fork.tts_isparent) | |
919 | { | |
920 | ptid = ptid_build (tts.tts_pid, tts.tts_lwpid, 0); | |
921 | ourstatus->value.related_pid = tts.tts_u.tts_fork.tts_fpid; | |
922 | } | |
923 | break; | |
924 | ||
925 | case TTEVT_VFORK: | |
926 | gdb_assert (!tts.tts_u.tts_fork.tts_isparent); | |
927 | ||
928 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
929 | ourstatus->value.related_pid = tts.tts_u.tts_fork.tts_fpid; | |
930 | ||
931 | /* HACK: To avoid touching the parent during the vfork, switch | |
932 | away from it. */ | |
933 | inferior_ptid = ptid; | |
934 | break; | |
935 | ||
a7be7fa8 MK |
936 | case TTEVT_LWP_CREATE: |
937 | lwpid = tts.tts_u.tts_thread.tts_target_lwpid; | |
938 | ptid = ptid_build (tts.tts_pid, lwpid, 0); | |
939 | if (inf_ttrace_num_lwps == 0) | |
940 | { | |
941 | /* Now that we're going to be multi-threaded, add the | |
3d450bdd | 942 | original thread to the list first. */ |
a7be7fa8 MK |
943 | add_thread (ptid_build (tts.tts_pid, tts.tts_lwpid, 0)); |
944 | inf_ttrace_num_lwps++; | |
945 | } | |
a3f17187 | 946 | printf_filtered (_("[New %s]\n"), target_pid_to_str (ptid)); |
a7be7fa8 MK |
947 | add_thread (ptid); |
948 | inf_ttrace_num_lwps++; | |
949 | ptid = ptid_build (tts.tts_pid, tts.tts_lwpid, 0); | |
950 | break; | |
951 | ||
952 | case TTEVT_LWP_EXIT: | |
a3f17187 | 953 | printf_filtered(_("[%s exited]\n"), target_pid_to_str (ptid)); |
a7be7fa8 MK |
954 | delete_thread (ptid); |
955 | inf_ttrace_num_lwps--; | |
956 | /* If we don't return -1 here, core GDB will re-add the thread. */ | |
957 | ptid = minus_one_ptid; | |
958 | break; | |
959 | ||
960 | case TTEVT_LWP_TERMINATE: | |
961 | lwpid = tts.tts_u.tts_thread.tts_target_lwpid; | |
962 | ptid = ptid_build (tts.tts_pid, lwpid, 0); | |
a3f17187 | 963 | printf_filtered(_("[%s has been terminated]\n"), target_pid_to_str (ptid)); |
a7be7fa8 MK |
964 | delete_thread (ptid); |
965 | inf_ttrace_num_lwps--; | |
966 | ptid = ptid_build (tts.tts_pid, tts.tts_lwpid, 0); | |
eee22bf8 | 967 | break; |
932936f0 | 968 | |
eee22bf8 MK |
969 | case TTEVT_SIGNAL: |
970 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
971 | ourstatus->value.sig = | |
972 | target_signal_from_host (tts.tts_u.tts_signal.tts_signo); | |
973 | break; | |
932936f0 MK |
974 | |
975 | case TTEVT_SYSCALL_ENTRY: | |
976 | gdb_assert (inf_ttrace_reenable_page_protections == 0); | |
a7be7fa8 MK |
977 | inf_ttrace_num_lwps_in_syscall++; |
978 | if (inf_ttrace_num_lwps_in_syscall == 1) | |
932936f0 MK |
979 | { |
980 | /* A thread has just entered a system call. Disable any | |
981 | page protections as the kernel can't deal with them. */ | |
982 | inf_ttrace_disable_page_protections (tts.tts_pid); | |
983 | } | |
984 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_ENTRY; | |
985 | ourstatus->value.syscall_id = tts.tts_scno; | |
986 | break; | |
987 | ||
988 | case TTEVT_SYSCALL_RETURN: | |
a7be7fa8 | 989 | if (inf_ttrace_num_lwps_in_syscall > 0) |
932936f0 MK |
990 | { |
991 | /* If the last thread has just left the system call, this | |
992 | would be a logical place to re-enable the page | |
993 | protections, but that doesn't work. We can't re-enable | |
994 | them until we've done another wait. */ | |
995 | inf_ttrace_reenable_page_protections = | |
a7be7fa8 MK |
996 | (inf_ttrace_num_lwps_in_syscall == 1); |
997 | inf_ttrace_num_lwps_in_syscall--; | |
932936f0 MK |
998 | } |
999 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_RETURN; | |
1000 | ourstatus->value.syscall_id = tts.tts_scno; | |
1001 | break; | |
a7be7fa8 MK |
1002 | |
1003 | default: | |
1004 | gdb_assert (!"Unexpected ttrace event"); | |
1005 | break; | |
eee22bf8 MK |
1006 | } |
1007 | ||
1008 | /* Make sure all threads within the process are stopped. */ | |
1009 | if (ttrace (TT_PROC_STOP, tts.tts_pid, 0, 0, 0, 0) == -1) | |
e2e0b3e5 | 1010 | perror_with_name (("ttrace")); |
eee22bf8 MK |
1011 | |
1012 | /* HACK: Twiddle INFERIOR_PTID such that the initial thread of a | |
1013 | process isn't recognized as a new thread. */ | |
1014 | if (ptid_get_lwp (inferior_ptid) == 0) | |
a7be7fa8 | 1015 | inferior_ptid = ptid; |
eee22bf8 | 1016 | |
a7be7fa8 | 1017 | return ptid; |
eee22bf8 MK |
1018 | } |
1019 | ||
1020 | /* Transfer LEN bytes from ADDR in the inferior's memory into READBUF, | |
1021 | and transfer LEN bytes from WRITEBUF into the inferior's memory at | |
1022 | ADDR. Either READBUF or WRITEBUF may be null, in which case the | |
1023 | corresponding transfer doesn't happen. Return the number of bytes | |
1024 | actually transferred (which may be zero if an error occurs). */ | |
1025 | ||
1026 | static LONGEST | |
1027 | inf_ttrace_xfer_memory (CORE_ADDR addr, ULONGEST len, | |
1028 | void *readbuf, const void *writebuf) | |
1029 | { | |
1030 | pid_t pid = ptid_get_pid (inferior_ptid); | |
1031 | ||
1032 | /* HP-UX treats text space and data space differently. GDB however, | |
1033 | doesn't really know the difference. Therefore we try both. Try | |
1034 | text space before data space though because when we're writing | |
1035 | into text space the instruction cache might need to be flushed. */ | |
1036 | ||
1037 | if (readbuf | |
1038 | && ttrace (TT_PROC_RDTEXT, pid, 0, addr, len, (uintptr_t)readbuf) == -1 | |
1039 | && ttrace (TT_PROC_RDDATA, pid, 0, addr, len, (uintptr_t)readbuf) == -1) | |
1040 | return 0; | |
1041 | ||
1042 | if (writebuf | |
1043 | && ttrace (TT_PROC_WRTEXT, pid, 0, addr, len, (uintptr_t)writebuf) == -1 | |
1044 | && ttrace (TT_PROC_WRDATA, pid, 0, addr, len, (uintptr_t)writebuf) == -1) | |
1045 | return 0; | |
1046 | ||
1047 | return len; | |
1048 | } | |
1049 | ||
1050 | static LONGEST | |
1051 | inf_ttrace_xfer_partial (struct target_ops *ops, enum target_object object, | |
7a4609f7 MK |
1052 | const char *annex, gdb_byte *readbuf, |
1053 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
eee22bf8 MK |
1054 | { |
1055 | switch (object) | |
1056 | { | |
1057 | case TARGET_OBJECT_MEMORY: | |
1058 | return inf_ttrace_xfer_memory (offset, len, readbuf, writebuf); | |
1059 | ||
1060 | case TARGET_OBJECT_UNWIND_TABLE: | |
1061 | return -1; | |
1062 | ||
1063 | case TARGET_OBJECT_AUXV: | |
1064 | return -1; | |
1065 | ||
1066 | case TARGET_OBJECT_WCOOKIE: | |
1067 | return -1; | |
1068 | ||
1069 | default: | |
1070 | return -1; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | /* Print status information about what we're accessing. */ | |
1075 | ||
1076 | static void | |
1077 | inf_ttrace_files_info (struct target_ops *ignore) | |
1078 | { | |
346e281c MK |
1079 | printf_filtered (_("\tUsing the running image of %s %s.\n"), |
1080 | attach_flag ? "attached" : "child", | |
1081 | target_pid_to_str (inferior_ptid)); | |
eee22bf8 | 1082 | } |
a7be7fa8 MK |
1083 | |
1084 | static int | |
1085 | inf_ttrace_thread_alive (ptid_t ptid) | |
1086 | { | |
1087 | return 1; | |
1088 | } | |
1089 | ||
1090 | static char * | |
1091 | inf_ttrace_pid_to_str (ptid_t ptid) | |
1092 | { | |
1093 | if (inf_ttrace_num_lwps > 0) | |
1094 | { | |
1095 | pid_t pid = ptid_get_pid (ptid); | |
1096 | lwpid_t lwpid = ptid_get_lwp (ptid); | |
fd0a2a6f | 1097 | static char buf[128]; |
a7be7fa8 | 1098 | |
5fff8fc0 MK |
1099 | xsnprintf (buf, sizeof buf, "process %ld, lwp %ld", |
1100 | (long)pid, (long)lwpid); | |
a7be7fa8 MK |
1101 | return buf; |
1102 | } | |
1103 | ||
1104 | return normal_pid_to_str (ptid); | |
1105 | } | |
eee22bf8 MK |
1106 | \f |
1107 | ||
1108 | struct target_ops * | |
1109 | inf_ttrace_target (void) | |
1110 | { | |
1111 | struct target_ops *t = inf_child_target (); | |
1112 | ||
eee22bf8 MK |
1113 | t->to_attach = inf_ttrace_attach; |
1114 | t->to_detach = inf_ttrace_detach; | |
1115 | t->to_resume = inf_ttrace_resume; | |
1116 | t->to_wait = inf_ttrace_wait; | |
eee22bf8 | 1117 | t->to_files_info = inf_ttrace_files_info; |
932936f0 | 1118 | t->to_can_use_hw_breakpoint = inf_ttrace_can_use_hw_breakpoint; |
932936f0 MK |
1119 | t->to_insert_watchpoint = inf_ttrace_insert_watchpoint; |
1120 | t->to_remove_watchpoint = inf_ttrace_remove_watchpoint; | |
1121 | t->to_stopped_by_watchpoint = inf_ttrace_stopped_by_watchpoint; | |
2a3cdf79 WZ |
1122 | t->to_region_ok_for_hw_watchpoint = |
1123 | inf_ttrace_region_ok_for_hw_watchpoint; | |
346e281c MK |
1124 | t->to_kill = inf_ttrace_kill; |
1125 | t->to_create_inferior = inf_ttrace_create_inferior; | |
1126 | t->to_follow_fork = inf_ttrace_follow_fork; | |
1127 | t->to_mourn_inferior = inf_ttrace_mourn_inferior; | |
1128 | t->to_thread_alive = inf_ttrace_thread_alive; | |
1129 | t->to_pid_to_str = inf_ttrace_pid_to_str; | |
1130 | t->to_xfer_partial = inf_ttrace_xfer_partial; | |
eee22bf8 MK |
1131 | |
1132 | ttrace_ops_hack = t; | |
1133 | return t; | |
1134 | } | |
d3322e8a | 1135 | #endif |
932936f0 MK |
1136 | \f |
1137 | ||
1138 | /* Prevent warning from -Wmissing-prototypes. */ | |
1139 | void _initialize_hppa_hpux_nat (void); | |
eee22bf8 | 1140 | |
932936f0 MK |
1141 | void |
1142 | _initialize_inf_ttrace (void) | |
1143 | { | |
d3322e8a | 1144 | #ifdef HAVE_TTRACE |
932936f0 | 1145 | inf_ttrace_page_dict.pagesize = getpagesize(); |
eee22bf8 | 1146 | #endif |
d3322e8a | 1147 | } |