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1 | /* Low level interface for debugging AIX 4.3+ pthreads. |
2 | ||
3 | Copyright 1999, 2000, 2002 Free Software Foundation, Inc. | |
4 | Written by Nick Duffek <nsd@redhat.com>. | |
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 2 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 | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | ||
24 | /* This module uses the libpthdebug.a library provided by AIX 4.3+ for | |
25 | debugging pthread applications. | |
26 | ||
27 | Some name prefix conventions: | |
28 | pthdb_ provided by libpthdebug.a | |
29 | pdc_ callbacks that this module provides to libpthdebug.a | |
30 | pd_ variables or functions interfacing with libpthdebug.a | |
31 | ||
32 | libpthdebug peculiarities: | |
33 | ||
34 | - pthdb_ptid_pthread() is prototyped in <sys/pthdebug.h>, but it's not | |
35 | documented, and after several calls it stops working and causes other | |
36 | libpthdebug functions to fail. | |
37 | ||
38 | - pthdb_tid_pthread() doesn't always work after pthdb_session_update(), | |
39 | but it does work after cycling through all threads using | |
40 | pthdb_pthread(). | |
41 | ||
42 | */ | |
43 | ||
44 | #include "defs.h" | |
45 | #include "gdbthread.h" | |
46 | #include "target.h" | |
47 | #include "inferior.h" | |
48 | #include "regcache.h" | |
8e2c28d4 | 49 | #include "gdbcmd.h" |
c11d79f2 KB |
50 | |
51 | #if 0 | |
52 | #include "coff/internal.h" /* for libcoff.h */ | |
53 | #include "bfd/libcoff.h" /* for xcoff_data */ | |
54 | #endif | |
55 | ||
56 | #include <procinfo.h> | |
57 | #include <sys/types.h> | |
58 | #include <sys/ptrace.h> | |
59 | #include <sys/reg.h> | |
60 | #if 0 | |
61 | #include <pthread.h> | |
62 | #endif | |
63 | #include <sched.h> | |
64 | #include <sys/pthdebug.h> | |
65 | ||
66 | /* Whether to emit debugging output. */ | |
8e2c28d4 | 67 | static int debug_aix_thread; |
c11d79f2 KB |
68 | |
69 | /* in AIX 5.1, functions use pthdb_tid_t instead of tid_t */ | |
70 | #ifndef PTHDB_VERSION_3 | |
71 | #define pthdb_tid_t tid_t | |
72 | #endif | |
73 | ||
74 | /* Return whether to treat PID as a debuggable thread id. */ | |
75 | ||
76 | #define PD_TID(ptid) (pd_active && ptid_get_tid (ptid) != 0) | |
77 | ||
78 | /* Build a thread ptid. */ | |
79 | #define BUILD_THREAD(TID, PID) ptid_build (PID, 0, TID) | |
80 | ||
81 | /* Build and lwp ptid. */ | |
82 | #define BUILD_LWP(LWP, PID) MERGEPID (PID, LWP) | |
83 | ||
c11d79f2 KB |
84 | /* pthdb_user_t value that we pass to pthdb functions. 0 causes |
85 | PTHDB_BAD_USER errors, so use 1. */ | |
86 | ||
87 | #define PD_USER 1 | |
88 | ||
89 | /* Success and failure values returned by pthdb callbacks. */ | |
90 | ||
91 | #define PDC_SUCCESS PTHDB_SUCCESS | |
92 | #define PDC_FAILURE PTHDB_CALLBACK | |
93 | ||
c11d79f2 KB |
94 | /* Private data attached to each element in GDB's thread list. */ |
95 | ||
96 | struct private_thread_info { | |
97 | pthdb_pthread_t pdtid; /* thread's libpthdebug id */ | |
98 | pthdb_tid_t tid; /* kernel thread id */ | |
99 | }; | |
100 | ||
101 | /* Information about a thread of which libpthdebug is aware. */ | |
102 | ||
103 | struct pd_thread { | |
104 | pthdb_pthread_t pdtid; | |
105 | pthread_t pthid; | |
106 | pthdb_tid_t tid; | |
107 | }; | |
108 | ||
109 | /* This module's target-specific operations, active while pd_able is true. */ | |
110 | ||
111 | static struct target_ops ops; | |
112 | ||
113 | /* Copy of the target over which ops is pushed. This is | |
114 | more convenient than a pointer to child_ops or core_ops, because | |
115 | they lack current_target's default callbacks. */ | |
116 | ||
117 | static struct target_ops base_ops; | |
118 | ||
119 | /* Address of the function that libpthread will call when libpthdebug is | |
120 | ready to be initialized. */ | |
121 | ||
122 | static CORE_ADDR pd_brk_addr; | |
123 | ||
124 | /* Whether the current application is debuggable by pthdb. */ | |
125 | ||
126 | static int pd_able = 0; | |
127 | ||
128 | /* Whether a threaded application is being debugged. */ | |
129 | ||
130 | static int pd_active = 0; | |
131 | ||
132 | /* Whether the current architecture is 64-bit. Only valid when pd_able is | |
133 | true. */ | |
134 | ||
135 | static int arch64; | |
136 | ||
137 | /* Saved pointer to previous owner of target_new_objfile_hook. */ | |
138 | ||
139 | static void (*target_new_objfile_chain)(struct objfile *); | |
140 | ||
141 | /* Forward declarations for pthdb callbacks. */ | |
142 | ||
143 | static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int); | |
144 | static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t); | |
145 | static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t); | |
146 | static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid, | |
147 | unsigned long long flags, pthdb_context_t *context); | |
148 | static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid, | |
149 | unsigned long long flags, pthdb_context_t *context); | |
150 | static int pdc_alloc (pthdb_user_t, size_t, void **); | |
151 | static int pdc_realloc (pthdb_user_t, void *, size_t, void **); | |
152 | static int pdc_dealloc (pthdb_user_t, void *); | |
153 | ||
154 | /* pthdb callbacks. */ | |
155 | ||
156 | static pthdb_callbacks_t pd_callbacks = { | |
157 | pdc_symbol_addrs, | |
158 | pdc_read_data, | |
159 | pdc_write_data, | |
160 | pdc_read_regs, | |
161 | pdc_write_regs, | |
162 | pdc_alloc, | |
163 | pdc_realloc, | |
164 | pdc_dealloc, | |
165 | NULL | |
166 | }; | |
167 | ||
168 | /* Current pthdb session. */ | |
169 | ||
170 | static pthdb_session_t pd_session; | |
171 | ||
c11d79f2 KB |
172 | /* Return a printable representation of pthdebug function return STATUS. */ |
173 | ||
174 | static char * | |
175 | pd_status2str (int status) | |
176 | { | |
177 | switch (status) | |
178 | { | |
179 | case PTHDB_SUCCESS: return "SUCCESS"; | |
180 | case PTHDB_NOSYS: return "NOSYS"; | |
181 | case PTHDB_NOTSUP: return "NOTSUP"; | |
182 | case PTHDB_BAD_VERSION: return "BAD_VERSION"; | |
183 | case PTHDB_BAD_USER: return "BAD_USER"; | |
184 | case PTHDB_BAD_SESSION: return "BAD_SESSION"; | |
185 | case PTHDB_BAD_MODE: return "BAD_MODE"; | |
186 | case PTHDB_BAD_FLAGS: return "BAD_FLAGS"; | |
187 | case PTHDB_BAD_CALLBACK: return "BAD_CALLBACK"; | |
188 | case PTHDB_BAD_POINTER: return "BAD_POINTER"; | |
189 | case PTHDB_BAD_CMD: return "BAD_CMD"; | |
190 | case PTHDB_BAD_PTHREAD: return "BAD_PTHREAD"; | |
191 | case PTHDB_BAD_ATTR: return "BAD_ATTR"; | |
192 | case PTHDB_BAD_MUTEX: return "BAD_MUTEX"; | |
193 | case PTHDB_BAD_MUTEXATTR: return "BAD_MUTEXATTR"; | |
194 | case PTHDB_BAD_COND: return "BAD_COND"; | |
195 | case PTHDB_BAD_CONDATTR: return "BAD_CONDATTR"; | |
196 | case PTHDB_BAD_RWLOCK: return "BAD_RWLOCK"; | |
197 | case PTHDB_BAD_RWLOCKATTR: return "BAD_RWLOCKATTR"; | |
198 | case PTHDB_BAD_KEY: return "BAD_KEY"; | |
199 | case PTHDB_BAD_PTID: return "BAD_PTID"; | |
200 | case PTHDB_BAD_TID: return "BAD_TID"; | |
201 | case PTHDB_CALLBACK: return "CALLBACK"; | |
202 | case PTHDB_CONTEXT: return "CONTEXT"; | |
203 | case PTHDB_HELD: return "HELD"; | |
204 | case PTHDB_NOT_HELD: return "NOT_HELD"; | |
205 | case PTHDB_MEMORY: return "MEMORY"; | |
206 | case PTHDB_NOT_PTHREADED: return "NOT_PTHREADED"; | |
207 | case PTHDB_SYMBOL: return "SYMBOL"; | |
208 | case PTHDB_NOT_AVAIL: return "NOT_AVAIL"; | |
209 | case PTHDB_INTERNAL: return "INTERNAL"; | |
210 | default: return "UNKNOWN"; | |
211 | } | |
212 | } | |
213 | ||
214 | /* A call to ptrace(REQ, ID, ...) just returned RET. Check for exceptional | |
215 | conditions and either return nonlocally or else return 1 for success and 0 | |
216 | for failure. */ | |
217 | ||
218 | static int | |
219 | ptrace_check (int req, int id, int ret) | |
220 | { | |
221 | if (ret == 0 && !errno) | |
222 | return 1; | |
223 | ||
224 | /* According to ptrace(2), ptrace may fail with EPERM if "the Identifier | |
225 | parameter corresponds to a kernel thread which is stopped in kernel mode | |
226 | and whose computational state cannot be read or written." This happens | |
227 | quite often with register reads. */ | |
228 | ||
229 | switch (req) | |
230 | { | |
231 | case PTT_READ_GPRS: | |
232 | case PTT_READ_FPRS: | |
233 | case PTT_READ_SPRS: | |
234 | if (ret == -1 && errno == EPERM) | |
42cc437f KB |
235 | { |
236 | if (debug_aix_thread) | |
237 | fprintf_unfiltered (gdb_stdlog, "ptrace (%d, %d) = %d (errno = %d)", | |
238 | req, id, ret, errno); | |
239 | return ret == -1 ? 0 : 1; | |
240 | } | |
c11d79f2 KB |
241 | break; |
242 | } | |
243 | error ("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)", | |
be006b8b | 244 | req, id, ret, errno, safe_strerror (errno)); |
42cc437f | 245 | return 0; /* not reached. */ |
c11d79f2 KB |
246 | } |
247 | ||
248 | /* Call ptracex(REQ, ID, ADDR, DATA, BUF). Return success. */ | |
249 | ||
250 | static int | |
251 | ptrace64aix (int req, int id, long long addr, int data, int *buf) | |
252 | { | |
253 | errno = 0; | |
254 | return ptrace_check (req, id, ptracex (req, id, addr, data, buf)); | |
255 | } | |
256 | ||
257 | /* Call ptrace(REQ, ID, ADDR, DATA, BUF). Return success. */ | |
258 | ||
259 | static int | |
260 | ptrace32 (int req, int id, int *addr, int data, int *buf) | |
261 | { | |
262 | errno = 0; | |
263 | return ptrace_check (req, id, ptrace (req, id, (int *)addr, data, buf)); | |
264 | } | |
265 | ||
266 | /* If *PIDP is a composite process/thread id, convert it to a process id. */ | |
267 | ||
268 | static void | |
269 | pid_to_prc (ptid_t *ptidp) | |
270 | { | |
271 | ptid_t ptid; | |
272 | ||
273 | ptid = *ptidp; | |
274 | if (PD_TID (ptid)) | |
275 | *ptidp = pid_to_ptid (PIDGET (ptid)); | |
276 | } | |
277 | ||
278 | /* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to the | |
279 | address of SYMBOLS[<i>].name. */ | |
280 | ||
281 | static int | |
282 | pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count) | |
283 | { | |
284 | struct minimal_symbol *ms; | |
285 | int i; | |
286 | char *name; | |
287 | ||
8e2c28d4 KB |
288 | if (debug_aix_thread) |
289 | fprintf_unfiltered (gdb_stdlog, | |
290 | "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)", | |
291 | user, (long) symbols, count); | |
c11d79f2 KB |
292 | |
293 | for (i = 0; i < count; i++) | |
294 | { | |
295 | name = symbols[i].name; | |
8e2c28d4 KB |
296 | if (debug_aix_thread) |
297 | fprintf_unfiltered (gdb_stdlog, " symbols[%d].name = \"%s\"", i, name); | |
c11d79f2 KB |
298 | |
299 | if (!*name) | |
300 | symbols[i].addr = 0; | |
301 | else | |
302 | { | |
303 | if (!(ms = lookup_minimal_symbol (name, NULL, NULL))) | |
304 | { | |
8e2c28d4 KB |
305 | if (debug_aix_thread) |
306 | fprintf_unfiltered (gdb_stdlog, " returning PDC_FAILURE"); | |
c11d79f2 KB |
307 | return PDC_FAILURE; |
308 | } | |
309 | symbols[i].addr = SYMBOL_VALUE_ADDRESS (ms); | |
310 | } | |
8e2c28d4 KB |
311 | if (debug_aix_thread) |
312 | fprintf_unfiltered (gdb_stdlog, " symbols[%d].addr = 0x%llx", | |
313 | i, symbols[i].addr); | |
c11d79f2 | 314 | } |
8e2c28d4 KB |
315 | if (debug_aix_thread) |
316 | fprintf_unfiltered (gdb_stdlog, " returning PDC_SUCCESS"); | |
c11d79f2 KB |
317 | return PDC_SUCCESS; |
318 | } | |
319 | ||
320 | /* Read registers call back function should be able to read the context */ | |
321 | /* information of a debuggee kernel thread from an active process or from */ | |
322 | /* a core file. The information should be formatted in context64 form for */ | |
323 | /* both 32-bit and 64-bit process. If successful return 0, else non-zero */ | |
324 | /* is returned. */ | |
325 | static int | |
326 | pdc_read_regs (pthdb_user_t user, | |
327 | pthdb_tid_t tid, | |
328 | unsigned long long flags, | |
329 | pthdb_context_t *context) | |
330 | { | |
331 | /* this function doesn't appear to be used, so we could probably just */ | |
332 | /* return 0 here. HOWEVER, if it is not defined, the OS will complain */ | |
333 | /* and several thread debug functions will fail. In case this is needed, */ | |
334 | /* I have implemented what I think it should do, however this code is */ | |
335 | /* untested. */ | |
336 | uint64_t gprs64[32]; | |
337 | uint32_t gprs32[32]; | |
338 | double fprs[32]; | |
339 | struct ptxsprs sprs64; | |
340 | struct ptsprs sprs32; | |
341 | ||
8e2c28d4 KB |
342 | if (debug_aix_thread) |
343 | fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%llx\n", | |
344 | (int)tid, flags); | |
c11d79f2 KB |
345 | |
346 | /* General-purpose registers. */ | |
347 | if (flags & PTHDB_FLAG_GPRS) | |
348 | { | |
349 | if (arch64) | |
350 | { | |
351 | if (!ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL)) | |
352 | memset (gprs64, 0, sizeof (gprs64)); | |
353 | memcpy (context->gpr, gprs64, sizeof(gprs64)); | |
354 | } | |
355 | else | |
356 | { | |
357 | if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL)) | |
358 | memset (gprs32, 0, sizeof (gprs32)); | |
359 | memcpy (context->gpr, gprs32, sizeof(gprs32)); | |
360 | } | |
361 | } | |
362 | ||
363 | /* Floating-point registers. */ | |
364 | if (flags & PTHDB_FLAG_FPRS) | |
365 | { | |
366 | if (!ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL)) | |
367 | memset (fprs, 0, sizeof (fprs)); | |
368 | memcpy (context->fpr, fprs, sizeof(fprs)); | |
369 | } | |
370 | ||
371 | /* Special-purpose registers. */ | |
372 | if (flags & PTHDB_FLAG_SPRS) | |
373 | { | |
374 | if (arch64) | |
375 | { | |
376 | if (!ptrace64aix (PTT_READ_SPRS, tid, (unsigned long) &sprs64, 0, NULL)) | |
377 | memset (&sprs64, 0, sizeof (sprs64)); | |
378 | memcpy (&context->msr, &sprs64, sizeof(sprs64)); | |
379 | } | |
380 | else | |
381 | { | |
382 | if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL)) | |
383 | memset (&sprs32, 0, sizeof (sprs32)); | |
384 | memcpy (&context->msr, &sprs32, sizeof(sprs32)); | |
385 | } | |
386 | } | |
387 | return 0; | |
388 | } | |
389 | ||
390 | /* Write register function should be able to write requested context */ | |
391 | /* information to specified debuggee's kernel thread id. If successful */ | |
392 | /* return 0, else non-zero is returned. */ | |
393 | static int | |
394 | pdc_write_regs (pthdb_user_t user, | |
395 | pthdb_tid_t tid, | |
396 | unsigned long long flags, | |
397 | pthdb_context_t *context) | |
398 | { | |
399 | /* this function doesn't appear to be used, so we could probably just */ | |
400 | /* return 0 here. HOWEVER, if it is not defined, the OS will complain */ | |
401 | /* and several thread debug functions will fail. In case this is needed, */ | |
402 | /* I have implemented what I think it should do, however this code is */ | |
403 | /* untested. */ | |
404 | ||
8e2c28d4 KB |
405 | if (debug_aix_thread) |
406 | fprintf_unfiltered (gdb_stdlog, "pdc_write_regs tid=%d flags=%llx\n", | |
407 | (int)tid, flags); | |
c11d79f2 KB |
408 | |
409 | /* General-purpose registers. */ | |
410 | if (flags & PTHDB_FLAG_GPRS) | |
411 | { | |
412 | if (arch64) | |
413 | ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long)context->gpr, 0, NULL); | |
414 | else | |
415 | ptrace32 (PTT_WRITE_GPRS, tid, (int *)context->gpr, 0, NULL); | |
416 | } | |
417 | ||
418 | /* Floating-point registers. */ | |
419 | if (flags & PTHDB_FLAG_FPRS) | |
420 | { | |
421 | ptrace32 (PTT_WRITE_FPRS, tid, (int *)context->fpr, 0, NULL); | |
422 | } | |
423 | ||
424 | /* Special-purpose registers. */ | |
425 | if (flags & PTHDB_FLAG_SPRS) | |
426 | { | |
427 | if (arch64) | |
428 | { | |
429 | ptrace64aix (PTT_WRITE_SPRS, tid, (unsigned long) &context->msr, 0, NULL); | |
430 | } | |
431 | else | |
432 | { | |
433 | ptrace32 (PTT_WRITE_SPRS, tid, (int *)&context->msr, 0, NULL); | |
434 | } | |
435 | } | |
436 | return 0; | |
437 | } | |
438 | ||
439 | /* pthdb callback: read LEN bytes from process ADDR into BUF. */ | |
440 | ||
441 | static int | |
442 | pdc_read_data (pthdb_user_t user, void *buf, pthdb_addr_t addr, size_t len) | |
443 | { | |
444 | int status, ret; | |
445 | ||
8e2c28d4 KB |
446 | if (debug_aix_thread) |
447 | fprintf_unfiltered (gdb_stdlog, | |
448 | "pdc_read_data (user = %ld, buf = 0x%lx, addr = 0x%llx, len = %ld)", | |
449 | user, (long) buf, addr, len); | |
c11d79f2 KB |
450 | |
451 | status = target_read_memory (addr, buf, len); | |
452 | ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; | |
453 | ||
8e2c28d4 KB |
454 | if (debug_aix_thread) |
455 | fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s", status, | |
456 | pd_status2str (ret)); | |
c11d79f2 KB |
457 | return ret; |
458 | } | |
459 | ||
460 | /* pthdb callback: write LEN bytes from BUF to process ADDR. */ | |
461 | ||
462 | static int | |
463 | pdc_write_data (pthdb_user_t user, void *buf, pthdb_addr_t addr, size_t len) | |
464 | { | |
465 | int status, ret; | |
466 | ||
8e2c28d4 KB |
467 | if (debug_aix_thread) |
468 | fprintf_unfiltered (gdb_stdlog, | |
469 | "pdc_write_data (user = %ld, buf = 0x%lx, addr = 0x%llx, len = %ld)", | |
470 | user, (long) buf, addr, len); | |
c11d79f2 KB |
471 | |
472 | status = target_write_memory (addr, buf, len); | |
473 | ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; | |
474 | ||
8e2c28d4 KB |
475 | if (debug_aix_thread) |
476 | fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s", status, | |
477 | pd_status2str (ret)); | |
c11d79f2 KB |
478 | return ret; |
479 | } | |
480 | ||
481 | /* pthdb callback: allocate a LEN-byte buffer and store a pointer to it in | |
482 | BUFP. */ | |
483 | ||
484 | static int | |
485 | pdc_alloc (pthdb_user_t user, size_t len, void **bufp) | |
486 | { | |
8e2c28d4 KB |
487 | if (debug_aix_thread) |
488 | fprintf_unfiltered (gdb_stdlog, | |
489 | "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)", | |
490 | user, len, (long) bufp); | |
c11d79f2 | 491 | *bufp = xmalloc (len); |
8e2c28d4 KB |
492 | if (debug_aix_thread) |
493 | fprintf_unfiltered (gdb_stdlog, " malloc returned 0x%lx", (long) *bufp); | |
c11d79f2 KB |
494 | /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never be |
495 | returned. */ | |
496 | return *bufp ? PDC_SUCCESS : PDC_FAILURE; | |
497 | } | |
498 | ||
499 | /* pthdb callback: reallocate BUF, which was allocated by the alloc or realloc | |
500 | callback, so that it contains LEN bytes, and store a pointer to the result | |
501 | in BUFP. */ | |
502 | ||
503 | static int | |
504 | pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp) | |
505 | { | |
8e2c28d4 KB |
506 | if (debug_aix_thread) |
507 | fprintf_unfiltered (gdb_stdlog, | |
508 | "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)", | |
509 | user, (long) buf, len, (long) bufp); | |
be006b8b | 510 | *bufp = xrealloc (buf, len); |
8e2c28d4 KB |
511 | if (debug_aix_thread) |
512 | fprintf_unfiltered (gdb_stdlog, " realloc returned 0x%lx", (long) *bufp); | |
c11d79f2 KB |
513 | return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
514 | } | |
515 | ||
516 | /* pthdb callback: free BUF, which was allocated by the alloc or realloc | |
517 | callback. */ | |
518 | ||
519 | static int | |
520 | pdc_dealloc (pthdb_user_t user, void *buf) | |
521 | { | |
8e2c28d4 KB |
522 | if (debug_aix_thread) |
523 | fprintf_unfiltered (gdb_stdlog, "pdc_free (user = %ld, buf = 0x%lx)", user, | |
524 | (long) buf); | |
c11d79f2 KB |
525 | xfree (buf); |
526 | return PDC_SUCCESS; | |
527 | } | |
528 | ||
529 | /* Return a printable representation of pthread STATE. */ | |
530 | ||
531 | static char * | |
532 | state2str (pthdb_state_t state) | |
533 | { | |
534 | switch (state) | |
535 | { | |
536 | case PST_IDLE: return "idle"; /* being created */ | |
537 | case PST_RUN: return "running"; /* running */ | |
538 | case PST_SLEEP: return "sleeping"; /* awaiting an event */ | |
539 | case PST_READY: return "ready"; /* runnable */ | |
540 | case PST_TERM: return "finished"; /* awaiting a join/detach */ | |
541 | default: return "unknown"; | |
542 | } | |
543 | } | |
544 | ||
545 | /* qsort() comparison function for sorting pd_thread structs by pthid. */ | |
546 | ||
547 | static int | |
548 | pcmp (const void *p1v, const void *p2v) | |
549 | { | |
550 | struct pd_thread *p1 = (struct pd_thread *) p1v; | |
551 | struct pd_thread *p2 = (struct pd_thread *) p2v; | |
552 | return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid; | |
553 | } | |
554 | ||
555 | /* iterate_over_threads() callback for counting GDB threads. */ | |
556 | ||
557 | static int | |
558 | giter_count (struct thread_info *thread, void *countp) | |
559 | { | |
560 | (*(int *) countp)++; | |
561 | return 0; | |
562 | } | |
563 | ||
564 | /* iterate_over_threads() callback for accumulating GDB thread pids. */ | |
565 | ||
566 | static int | |
567 | giter_accum (struct thread_info *thread, void *bufp) | |
568 | { | |
569 | **(struct thread_info ***) bufp = thread; | |
570 | (*(struct thread_info ***) bufp)++; | |
571 | return 0; | |
572 | } | |
573 | ||
574 | /* ptid comparison function */ | |
575 | static int | |
576 | ptid_cmp (ptid_t ptid1, ptid_t ptid2) | |
577 | { | |
578 | int pid1, pid2; | |
579 | ||
580 | if (ptid_get_pid (ptid1) < ptid_get_pid (ptid2)) | |
581 | return -1; | |
582 | else if (ptid_get_pid (ptid1) > ptid_get_pid (ptid2)) | |
583 | return 1; | |
584 | else if (ptid_get_tid (ptid1) < ptid_get_tid (ptid2)) | |
585 | return -1; | |
586 | else if (ptid_get_tid (ptid1) > ptid_get_tid (ptid2)) | |
587 | return 1; | |
588 | else if (ptid_get_lwp (ptid1) < ptid_get_lwp (ptid2)) | |
589 | return -1; | |
590 | else if (ptid_get_lwp (ptid1) > ptid_get_lwp (ptid2)) | |
591 | return 1; | |
592 | else | |
593 | return 0; | |
594 | } | |
595 | ||
596 | /* qsort() comparison function for sorting thread_info structs by pid. */ | |
597 | ||
598 | static int | |
599 | gcmp (const void *t1v, const void *t2v) | |
600 | { | |
601 | struct thread_info *t1 = *(struct thread_info **) t1v; | |
602 | struct thread_info *t2 = *(struct thread_info **) t2v; | |
603 | return ptid_cmp (t1->ptid, t2->ptid); | |
604 | } | |
605 | ||
606 | /* Synchronize GDB's thread list with libpthdebug's. | |
607 | ||
608 | There are some benefits of doing this every time the inferior stops: | |
609 | ||
610 | - allows users to run thread-specific commands without needing to run | |
611 | "info threads" first | |
612 | ||
613 | - helps pthdb_tid_pthread() work properly (see "libpthdebug | |
614 | peculiarities" at the top of this module) | |
615 | ||
616 | - simplifies the demands placed on libpthdebug, which seems to have | |
617 | difficulty with certain call patterns */ | |
618 | ||
619 | static void | |
620 | sync_threadlists (void) | |
621 | { | |
622 | int cmd, status, infpid; | |
623 | int pcount, psize, pi, gcount, gi; | |
624 | struct pd_thread *pbuf; | |
625 | struct thread_info **gbuf, **g, *thread; | |
626 | pthdb_pthread_t pdtid; | |
627 | pthread_t pthid; | |
628 | pthdb_tid_t tid; | |
c11d79f2 KB |
629 | |
630 | /* Accumulate an array of libpthdebug threads sorted by pthread id. */ | |
631 | ||
632 | pcount = 0; | |
633 | psize = 1; | |
634 | pbuf = (struct pd_thread *) xmalloc (psize * sizeof *pbuf); | |
635 | ||
636 | for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT) | |
637 | { | |
638 | status = pthdb_pthread (pd_session, &pdtid, cmd); | |
639 | if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD) | |
640 | break; | |
641 | ||
642 | status = pthdb_pthread_ptid (pd_session, pdtid, &pthid); | |
643 | if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID) | |
644 | continue; | |
645 | ||
646 | if (pcount == psize) | |
647 | { | |
648 | psize *= 2; | |
649 | pbuf = (struct pd_thread *) xrealloc (pbuf, psize * sizeof *pbuf); | |
650 | } | |
651 | pbuf[pcount].pdtid = pdtid; | |
652 | pbuf[pcount].pthid = pthid; | |
653 | pcount++; | |
654 | } | |
655 | ||
656 | for (pi = 0; pi < pcount; pi++) | |
657 | { | |
658 | status = pthdb_pthread_tid (pd_session, pbuf[pi].pdtid, &tid); | |
659 | if (status != PTHDB_SUCCESS) | |
660 | tid = PTHDB_INVALID_TID; | |
661 | pbuf[pi].tid = tid; | |
662 | } | |
663 | ||
664 | qsort (pbuf, pcount, sizeof *pbuf, pcmp); | |
665 | ||
666 | /* Accumulate an array of GDB threads sorted by pid. */ | |
667 | ||
668 | gcount = 0; | |
669 | iterate_over_threads (giter_count, &gcount); | |
670 | g = gbuf = (struct thread_info **) xmalloc (gcount * sizeof *gbuf); | |
671 | iterate_over_threads (giter_accum, &g); | |
672 | qsort (gbuf, gcount, sizeof *gbuf, gcmp); | |
673 | ||
674 | /* Apply differences between the two arrays to GDB's thread list. */ | |
675 | ||
676 | infpid = PIDGET (inferior_ptid); | |
677 | for (pi = gi = 0; pi < pcount || gi < gcount;) | |
678 | { | |
c11d79f2 | 679 | if (pi == pcount) |
c11d79f2 | 680 | { |
42cc437f | 681 | delete_thread (gbuf[gi]->ptid); |
c11d79f2 KB |
682 | gi++; |
683 | } | |
42cc437f | 684 | else if (gi == gcount) |
c11d79f2 | 685 | { |
42cc437f | 686 | thread = add_thread (BUILD_THREAD (pbuf[pi].pthid, infpid)); |
c11d79f2 | 687 | thread->private = xmalloc (sizeof (struct private_thread_info)); |
42cc437f KB |
688 | thread->private->pdtid = pbuf[pi].pdtid; |
689 | thread->private->tid = pbuf[pi].tid; | |
c11d79f2 KB |
690 | pi++; |
691 | } | |
42cc437f KB |
692 | else |
693 | { | |
694 | ptid_t pptid, gptid; | |
695 | int cmp_result; | |
696 | ||
697 | pptid = BUILD_THREAD (pbuf[pi].pthid, infpid); | |
698 | gptid = gbuf[gi]->ptid; | |
699 | pdtid = pbuf[pi].pdtid; | |
700 | tid = pbuf[pi].tid; | |
c11d79f2 | 701 | |
42cc437f KB |
702 | cmp_result = ptid_cmp (pptid, gptid); |
703 | ||
704 | if (cmp_result == 0) | |
705 | { | |
706 | gbuf[gi]->private->pdtid = pdtid; | |
707 | gbuf[gi]->private->tid = tid; | |
708 | pi++; | |
709 | gi++; | |
710 | } | |
711 | else if (cmp_result > 0) | |
712 | { | |
713 | delete_thread (gptid); | |
714 | gi++; | |
715 | } | |
716 | else | |
717 | { | |
718 | thread = add_thread (pptid); | |
719 | thread->private = xmalloc (sizeof (struct private_thread_info)); | |
720 | thread->private->pdtid = pdtid; | |
721 | thread->private->tid = tid; | |
722 | pi++; | |
723 | } | |
724 | } | |
c11d79f2 KB |
725 | } |
726 | ||
727 | xfree (pbuf); | |
728 | xfree (gbuf); | |
729 | } | |
730 | ||
731 | /* iterate_over_threads() callback for locating a thread whose kernel thread | |
732 | just received a trap signal. */ | |
733 | ||
734 | static int | |
735 | iter_trap (struct thread_info *thread, void *unused) | |
736 | { | |
737 | struct thrdsinfo64 thrinf; | |
738 | pthdb_tid_t tid; | |
739 | ||
740 | /* getthrds(3) isn't prototyped in any AIX 4.3.3 #include file. */ | |
741 | extern int getthrds (pid_t, struct thrdsinfo64 *, int, pthdb_tid_t *, int); | |
742 | ||
743 | tid = thread->private->tid; | |
744 | if (tid == PTHDB_INVALID_TID) | |
745 | return 0; | |
746 | ||
747 | if (getthrds (PIDGET (inferior_ptid), &thrinf, sizeof (thrinf), &tid, 1) != 1) | |
748 | return 0; | |
749 | ||
750 | return thrinf.ti_cursig == SIGTRAP; | |
751 | } | |
752 | ||
753 | /* Synchronize libpthdebug's state with the inferior and with GDB, generate a | |
754 | composite process/thread <pid> for the current thread, set inferior_ptid to | |
755 | <pid> if SET_INFPID, and return <pid>. */ | |
756 | ||
757 | static ptid_t | |
758 | pd_update (int set_infpid) | |
759 | { | |
760 | int status; | |
761 | ptid_t ptid; | |
762 | struct thread_info *thread; | |
763 | ||
764 | if (!pd_active) | |
765 | return inferior_ptid; | |
766 | ||
767 | status = pthdb_session_update (pd_session); | |
768 | if (status != PTHDB_SUCCESS) | |
769 | return inferior_ptid; | |
770 | ||
771 | sync_threadlists (); | |
772 | ||
773 | /* Define "current thread" as one that just received a trap signal. */ | |
774 | ||
775 | thread = iterate_over_threads (iter_trap, NULL); | |
776 | if (!thread) | |
777 | ptid = inferior_ptid; | |
778 | else | |
779 | { | |
780 | ptid = thread->ptid; | |
781 | if (set_infpid) | |
782 | inferior_ptid = ptid; | |
783 | } | |
784 | return ptid; | |
785 | } | |
786 | ||
787 | /* Try to start debugging threads in the current process. If successful and | |
788 | SET_INFPID, set inferior_ptid to reflect the current thread. */ | |
789 | ||
790 | static ptid_t | |
791 | pd_activate (int set_infpid) | |
792 | { | |
793 | int status; | |
794 | ||
795 | status = pthdb_session_init (PD_USER, arch64 ? PEM_64BIT : PEM_32BIT, | |
796 | PTHDB_FLAG_REGS, &pd_callbacks, &pd_session); | |
797 | if (status != PTHDB_SUCCESS) | |
798 | { | |
799 | return inferior_ptid; | |
800 | } | |
801 | pd_active = 1; | |
802 | return pd_update (set_infpid); | |
803 | } | |
804 | ||
805 | /* Undo the effects of pd_activate(). */ | |
806 | ||
807 | static void | |
808 | pd_deactivate (void) | |
809 | { | |
810 | if (!pd_active) | |
811 | return; | |
812 | pthdb_session_destroy (pd_session); | |
813 | ||
814 | pid_to_prc (&inferior_ptid); | |
815 | pd_active = 0; | |
816 | } | |
817 | ||
818 | /* An object file has just been loaded. Check whether the current application | |
819 | is pthreaded, and if so, prepare for thread debugging. */ | |
820 | ||
821 | static void | |
822 | pd_enable (void) | |
823 | { | |
824 | int status; | |
825 | char *stub_name; | |
826 | struct minimal_symbol *ms; | |
827 | ||
828 | /* Don't initialize twice. */ | |
829 | if (pd_able) | |
830 | return; | |
831 | ||
832 | /* Check application word size. */ | |
833 | arch64 = REGISTER_RAW_SIZE (0) == 8; | |
834 | ||
835 | /* Check whether the application is pthreaded. */ | |
836 | stub_name = NULL; | |
837 | status = pthdb_session_pthreaded (PD_USER, PTHDB_FLAG_REGS, &pd_callbacks, | |
838 | &stub_name); | |
839 | if ((status != PTHDB_SUCCESS && status != PTHDB_NOT_PTHREADED) || !stub_name) | |
840 | return; | |
841 | ||
842 | /* Set a breakpoint on the returned stub function. */ | |
843 | if (!(ms = lookup_minimal_symbol (stub_name, NULL, NULL))) | |
844 | return; | |
845 | pd_brk_addr = SYMBOL_VALUE_ADDRESS (ms); | |
846 | if (!create_thread_event_breakpoint (pd_brk_addr)) | |
847 | return; | |
848 | ||
849 | /* Prepare for thread debugging. */ | |
850 | base_ops = current_target; | |
851 | push_target (&ops); | |
852 | pd_able = 1; | |
853 | ||
854 | /* If we're debugging a core file or an attached inferior, the pthread | |
855 | library may already have been initialized, so try to activate thread | |
856 | debugging. */ | |
857 | pd_activate (1); | |
858 | } | |
859 | ||
860 | /* Undo the effects of pd_enable(). */ | |
861 | ||
862 | static void | |
863 | pd_disable (void) | |
864 | { | |
865 | if (!pd_able) | |
866 | return; | |
867 | if (pd_active) | |
868 | pd_deactivate (); | |
869 | pd_able = 0; | |
870 | unpush_target (&ops); | |
871 | } | |
872 | ||
873 | /* target_new_objfile_hook callback. | |
874 | ||
875 | If OBJFILE is non-null, check whether a threaded application is being | |
876 | debugged, and if so, prepare for thread debugging. | |
877 | ||
878 | If OBJFILE is null, stop debugging threads. */ | |
879 | ||
880 | static void | |
881 | new_objfile (struct objfile *objfile) | |
882 | { | |
883 | if (objfile) | |
884 | pd_enable (); | |
885 | else | |
886 | pd_disable (); | |
887 | ||
888 | if (target_new_objfile_chain) | |
889 | target_new_objfile_chain (objfile); | |
890 | } | |
891 | ||
892 | /* Attach to process specified by ARGS. */ | |
893 | ||
894 | static void | |
895 | ops_attach (char *args, int from_tty) | |
896 | { | |
897 | base_ops.to_attach (args, from_tty); | |
898 | pd_activate (1); | |
899 | } | |
900 | ||
901 | /* Detach from the process attached to by ops_attach(). */ | |
902 | ||
903 | static void | |
904 | ops_detach (char *args, int from_tty) | |
905 | { | |
906 | pd_deactivate (); | |
907 | base_ops.to_detach (args, from_tty); | |
908 | } | |
909 | ||
910 | /* Tell the inferior process to continue running thread PID if != -1 | |
911 | and all threads otherwise. */ | |
912 | ||
913 | static void | |
914 | ops_resume (ptid_t ptid, int step, enum target_signal sig) | |
915 | { | |
916 | struct thread_info *thread; | |
917 | pthdb_tid_t tid[2]; | |
918 | ||
919 | if (!PD_TID (ptid)) | |
14fa3751 KB |
920 | { |
921 | struct cleanup *cleanup = save_inferior_ptid (); | |
922 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
923 | base_ops.to_resume (ptid, step, sig); | |
924 | do_cleanups (cleanup); | |
925 | } | |
c11d79f2 KB |
926 | else |
927 | { | |
928 | thread = find_thread_pid (ptid); | |
929 | if (!thread) | |
930 | error ("aix-thread resume: unknown pthread %ld", TIDGET (ptid)); | |
931 | ||
932 | tid[0] = thread->private->tid; | |
933 | if (tid[0] == PTHDB_INVALID_TID) | |
934 | error ("aix-thread resume: no tid for pthread %ld", TIDGET (ptid)); | |
935 | tid[1] = 0; | |
936 | ||
937 | if (arch64) | |
938 | ptrace64aix (PTT_CONTINUE, tid[0], 1, target_signal_to_host (sig), (int *)tid); | |
939 | else | |
940 | ptrace32 (PTT_CONTINUE, tid[0], (int *) 1, | |
941 | target_signal_to_host (sig), (int *)tid); | |
942 | } | |
943 | } | |
944 | ||
945 | /* Wait for thread/process ID if != -1 or for any thread otherwise. If an | |
946 | error occurs, return -1, else return the pid of the stopped thread. */ | |
947 | ||
948 | static ptid_t | |
949 | ops_wait (ptid_t ptid, struct target_waitstatus *status) | |
950 | { | |
14fa3751 KB |
951 | struct cleanup *cleanup = save_inferior_ptid (); |
952 | ||
c11d79f2 | 953 | pid_to_prc (&ptid); |
14fa3751 KB |
954 | |
955 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
956 | ptid = base_ops.to_wait (ptid, status); | |
957 | do_cleanups (cleanup); | |
958 | ||
c11d79f2 KB |
959 | if (PIDGET (ptid) == -1) |
960 | return pid_to_ptid (-1); | |
961 | ||
962 | /* Check whether libpthdebug might be ready to be initialized. */ | |
963 | if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED && | |
964 | status->value.sig == TARGET_SIGNAL_TRAP && | |
965 | read_pc_pid (ptid) - DECR_PC_AFTER_BREAK == pd_brk_addr) | |
966 | return pd_activate (0); | |
967 | ||
968 | return pd_update (0); | |
969 | } | |
970 | ||
971 | /* Record that the 64-bit general-purpose registers contain VALS. */ | |
972 | ||
973 | static void | |
974 | supply_gprs64 (uint64_t *vals) | |
975 | { | |
976 | int regno; | |
977 | ||
978 | for (regno = 0; regno < 32; regno++) | |
979 | supply_register (regno, (char *) (vals + regno)); | |
980 | } | |
981 | ||
982 | /* Record that 32-bit register REGNO contains VAL. */ | |
983 | ||
984 | static void | |
985 | supply_reg32 (int regno, uint32_t val) | |
986 | { | |
987 | supply_register (regno, (char *) &val); | |
988 | } | |
989 | ||
990 | /* Record that the floating-point registers contain VALS. */ | |
991 | ||
992 | static void | |
993 | supply_fprs (double *vals) | |
994 | { | |
995 | int regno; | |
996 | ||
997 | for (regno = 0; regno < 32; regno++) | |
998 | supply_register (regno + FP0_REGNUM, (char *) (vals + regno)); | |
999 | } | |
1000 | ||
1001 | /* Record that the special registers contain the specified 64-bit and 32-bit | |
1002 | values. */ | |
1003 | ||
1004 | static void | |
1005 | supply_sprs64 (uint64_t iar, uint64_t msr, uint32_t cr, | |
1006 | uint64_t lr, uint64_t ctr, uint32_t xer) | |
1007 | { | |
1008 | int regno = FIRST_UISA_SP_REGNUM; | |
1009 | supply_register (regno, (char *) &iar); | |
1010 | supply_register (regno + 1, (char *) &msr); | |
1011 | supply_register (regno + 2, (char *) &cr); | |
1012 | supply_register (regno + 3, (char *) &lr); | |
1013 | supply_register (regno + 4, (char *) &ctr); | |
1014 | supply_register (regno + 5, (char *) &xer); | |
1015 | } | |
1016 | ||
1017 | /* Record that the special registers contain the specified 32-bit values. */ | |
1018 | ||
1019 | static void | |
1020 | supply_sprs32 (uint32_t iar, uint32_t msr, uint32_t cr, | |
1021 | uint32_t lr, uint32_t ctr, uint32_t xer) | |
1022 | { | |
1023 | int regno = FIRST_UISA_SP_REGNUM; | |
1024 | supply_register (regno, (char *) &iar); | |
1025 | supply_register (regno + 1, (char *) &msr); | |
1026 | supply_register (regno + 2, (char *) &cr); | |
1027 | supply_register (regno + 3, (char *) &lr); | |
1028 | supply_register (regno + 4, (char *) &ctr); | |
1029 | supply_register (regno + 5, (char *) &xer); | |
1030 | } | |
1031 | ||
1032 | /* Fetch all registers from pthread PDTID, which doesn't have a kernel | |
1033 | thread. | |
1034 | ||
1035 | There's no way to query a single register from a non-kernel pthread, | |
1036 | so there's no need for a single-register version of this function. */ | |
1037 | ||
1038 | static void | |
1039 | fetch_regs_lib (pthdb_pthread_t pdtid) | |
1040 | { | |
1041 | int status, i; | |
1042 | pthdb_context_t ctx; | |
1043 | ||
8e2c28d4 KB |
1044 | if (debug_aix_thread) |
1045 | fprintf_unfiltered (gdb_stdlog, "fetch_regs_lib %lx\n", (long)pdtid); | |
c11d79f2 KB |
1046 | status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
1047 | if (status != PTHDB_SUCCESS) | |
14fa3751 KB |
1048 | error ("aix-thread: fetch_registers: pthdb_pthread_context returned %s", |
1049 | pd_status2str (status)); | |
c11d79f2 KB |
1050 | |
1051 | /* General-purpose registers. */ | |
1052 | ||
1053 | if (arch64) | |
1054 | supply_gprs64 (ctx.gpr); | |
1055 | else | |
1056 | for (i = 0; i < 32; i++) | |
1057 | supply_reg32 (i, ctx.gpr[i]); | |
1058 | ||
1059 | /* Floating-point registers. */ | |
1060 | ||
1061 | supply_fprs (ctx.fpr); | |
1062 | ||
1063 | /* Special registers. */ | |
1064 | ||
1065 | if (arch64) | |
1066 | supply_sprs64 (ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, ctx.xer); | |
1067 | else | |
1068 | supply_sprs32 (ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, ctx.xer); | |
1069 | } | |
1070 | ||
1071 | /* Fetch register REGNO if != -1 or all registers otherwise from kernel thread | |
1072 | TID. | |
1073 | ||
1074 | AIX provides a way to query all of a kernel thread's GPRs, FPRs, or SPRs, | |
1075 | but there's no way to query individual registers within those groups. | |
1076 | Therefore, if REGNO != -1, this function fetches an entire group. | |
1077 | ||
1078 | Unfortunately, kernel thread register queries often fail with EPERM, | |
1079 | indicating that the thread is in kernel space. This breaks backtraces of | |
1080 | threads other than the current one. To make that breakage obvious without | |
1081 | throwing an error to top level (which is bad e.g. during "info threads" | |
1082 | output), zero registers that can't be retrieved. */ | |
1083 | ||
1084 | static void | |
1085 | fetch_regs_kern (int regno, pthdb_tid_t tid) | |
1086 | { | |
1087 | uint64_t gprs64[32]; | |
1088 | uint32_t gprs32[32]; | |
1089 | double fprs[32]; | |
1090 | struct ptxsprs sprs64; | |
1091 | struct ptsprs sprs32; | |
1092 | int i; | |
1093 | ||
8e2c28d4 KB |
1094 | if (debug_aix_thread) |
1095 | fprintf_unfiltered (gdb_stdlog, | |
1096 | "fetch_regs_kern tid=%lx regno=%d arch64=%d\n", | |
1097 | (long)tid, regno, arch64); | |
c11d79f2 KB |
1098 | |
1099 | /* General-purpose registers. */ | |
1100 | if (regno == -1 || regno < FP0_REGNUM) | |
1101 | { | |
1102 | if (arch64) | |
1103 | { | |
1104 | if (!ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL)) | |
1105 | memset (gprs64, 0, sizeof (gprs64)); | |
1106 | supply_gprs64 (gprs64); | |
1107 | } | |
1108 | else | |
1109 | { | |
1110 | if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL)) | |
1111 | memset (gprs32, 0, sizeof (gprs32)); | |
1112 | for (i = 0; i < 32; i++) | |
1113 | supply_reg32 (i, gprs32[i]); | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | /* Floating-point registers. */ | |
1118 | ||
1119 | if (regno == -1 || (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)) | |
1120 | { | |
1121 | if (!ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL)) | |
1122 | memset (fprs, 0, sizeof (fprs)); | |
1123 | supply_fprs (fprs); | |
1124 | } | |
1125 | ||
1126 | /* Special-purpose registers. */ | |
1127 | ||
1128 | if (regno == -1 || (regno > FPLAST_REGNUM && regno <= LAST_UISA_SP_REGNUM)) | |
1129 | { | |
1130 | if (arch64) | |
1131 | { | |
1132 | if (!ptrace64aix (PTT_READ_SPRS, tid, (unsigned long) &sprs64, 0, NULL)) | |
1133 | memset (&sprs64, 0, sizeof (sprs64)); | |
1134 | supply_sprs64 (sprs64.pt_iar, sprs64.pt_msr, sprs64.pt_cr, | |
1135 | sprs64.pt_lr, sprs64.pt_ctr, sprs64.pt_xer); | |
1136 | } | |
1137 | else | |
1138 | { | |
1139 | if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL)) | |
1140 | memset (&sprs32, 0, sizeof (sprs32)); | |
1141 | supply_sprs32 (sprs32.pt_iar, sprs32.pt_msr, sprs32.pt_cr, | |
1142 | sprs32.pt_lr, sprs32.pt_ctr, sprs32.pt_xer); | |
1143 | ||
1144 | if (REGISTER_RAW_SIZE (LAST_UISA_SP_REGNUM)) | |
1145 | supply_register (LAST_UISA_SP_REGNUM, (char *) &sprs32.pt_mq); | |
1146 | } | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | /* Fetch register REGNO if != -1 or all registers otherwise in the | |
1151 | thread/process specified by inferior_ptid. */ | |
1152 | ||
1153 | static void | |
1154 | ops_fetch_registers (int regno) | |
1155 | { | |
1156 | struct thread_info *thread; | |
1157 | pthdb_tid_t tid; | |
1158 | ||
1159 | if (!PD_TID (inferior_ptid)) | |
1160 | base_ops.to_fetch_registers (regno); | |
1161 | else | |
1162 | { | |
1163 | thread = find_thread_pid (inferior_ptid); | |
1164 | tid = thread->private->tid; | |
1165 | ||
1166 | if (tid == PTHDB_INVALID_TID) | |
1167 | fetch_regs_lib (thread->private->pdtid); | |
1168 | else | |
1169 | fetch_regs_kern (regno, tid); | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | /* Store the special registers into the specified 64-bit and 32-bit | |
1174 | locations. */ | |
1175 | ||
1176 | static void | |
1177 | fill_sprs64 (uint64_t *iar, uint64_t *msr, uint32_t *cr, | |
1178 | uint64_t *lr, uint64_t *ctr, uint32_t *xer) | |
1179 | { | |
1180 | int regno = FIRST_UISA_SP_REGNUM; | |
1181 | *iar = read_register (regno); | |
1182 | *msr = read_register (regno + 1); | |
1183 | *cr = read_register (regno + 2); | |
1184 | *lr = read_register (regno + 3); | |
1185 | *ctr = read_register (regno + 4); | |
1186 | *xer = read_register (regno + 5); | |
1187 | } | |
1188 | ||
1189 | /* Store all registers into pthread PDTID, which doesn't have a kernel | |
1190 | thread. | |
1191 | ||
1192 | It's possible to store a single register into a non-kernel pthread, but I | |
1193 | doubt it's worth the effort. */ | |
1194 | ||
1195 | static void | |
1196 | store_regs_lib (pthdb_pthread_t pdtid) | |
1197 | { | |
1198 | int status, i; | |
1199 | pthdb_context_t ctx; | |
1200 | ||
8e2c28d4 KB |
1201 | if (debug_aix_thread) |
1202 | fprintf_unfiltered (gdb_stdlog, "store_regs_lib %lx\n", (long)pdtid); | |
c11d79f2 KB |
1203 | |
1204 | /* Retrieve the thread's current context for its non-register values. */ | |
1205 | status = pthdb_pthread_context (pd_session, pdtid, &ctx); | |
1206 | if (status != PTHDB_SUCCESS) | |
14fa3751 KB |
1207 | error ("aix-thread: store_registers: pthdb_pthread_context returned %s", |
1208 | pd_status2str (status)); | |
c11d79f2 KB |
1209 | |
1210 | /* General-purpose registers. */ | |
1211 | ||
1212 | for (i = 0; i < 32; i++) | |
1213 | ctx.gpr[i] = read_register (i); | |
1214 | ||
1215 | /* Floating-point registers. */ | |
1216 | ||
1217 | for (i = 0; i < 32; i++) | |
1218 | ctx.fpr[i] = *(double *) ®isters[REGISTER_BYTE (FP0_REGNUM + i)]; | |
1219 | ||
1220 | /* Special registers. */ | |
1221 | ||
1222 | fill_sprs64 (&ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr, &ctx.xer); | |
1223 | ||
1224 | status = pthdb_pthread_setcontext (pd_session, pdtid, &ctx); | |
1225 | if (status != PTHDB_SUCCESS) | |
14fa3751 KB |
1226 | error ("aix-thread: store_registers: pthdb_pthread_setcontext returned %s", |
1227 | pd_status2str (status)); | |
c11d79f2 KB |
1228 | } |
1229 | ||
1230 | /* Store register REGNO if != -1 or all registers otherwise into kernel | |
1231 | thread TID. | |
1232 | ||
1233 | AIX provides a way to set all of a kernel thread's GPRs, FPRs, or SPRs, but | |
1234 | there's no way to set individual registers within those groups. Therefore, | |
1235 | if REGNO != -1, this function stores an entire group. */ | |
1236 | ||
1237 | static void | |
1238 | store_regs_kern (int regno, pthdb_tid_t tid) | |
1239 | { | |
1240 | struct ptxsprs sprs64; | |
1241 | struct ptsprs sprs32; | |
1242 | char *regp; | |
1243 | ||
8e2c28d4 KB |
1244 | if (debug_aix_thread) |
1245 | fprintf_unfiltered (gdb_stdlog, "store_regs_kern tid=%lx regno=%d\n", | |
1246 | (long)tid, regno); | |
c11d79f2 KB |
1247 | |
1248 | /* General-purpose registers. */ | |
1249 | if (regno == -1 || regno < FP0_REGNUM) | |
1250 | { | |
1251 | regp = ®isters[REGISTER_BYTE (0)]; | |
1252 | if (arch64) | |
1253 | ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long) regp, 0, NULL); | |
1254 | else | |
1255 | ptrace32 (PTT_WRITE_GPRS, tid, (int *) regp, 0, NULL); | |
1256 | } | |
1257 | ||
1258 | /* Floating-point registers. */ | |
1259 | ||
1260 | if (regno == -1 || (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)) | |
1261 | { | |
1262 | regp = ®isters[REGISTER_BYTE (FP0_REGNUM)]; | |
1263 | ptrace32 (PTT_WRITE_FPRS, tid, (int *) regp, 0, NULL); | |
1264 | } | |
1265 | ||
1266 | /* Special-purpose registers. */ | |
1267 | ||
1268 | if (regno == -1 || (regno > FPLAST_REGNUM && regno <= LAST_UISA_SP_REGNUM)) | |
1269 | { | |
1270 | if (arch64) | |
1271 | { | |
1272 | ptrace64aix (PTT_READ_SPRS, tid, (unsigned long) &sprs64, 0, NULL); | |
1273 | fill_sprs64 (&sprs64.pt_iar, &sprs64.pt_msr, &sprs64.pt_cr, | |
1274 | &sprs64.pt_lr, &sprs64.pt_ctr, &sprs64.pt_xer); | |
1275 | ptrace64aix (PTT_WRITE_SPRS, tid, (unsigned long) &sprs64, 0, NULL); | |
1276 | } | |
1277 | else | |
1278 | { | |
1279 | ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL); | |
1280 | ||
1281 | regno = FIRST_UISA_SP_REGNUM; | |
1282 | sprs32.pt_iar = read_register (regno); | |
1283 | sprs32.pt_msr = read_register (regno + 1); | |
1284 | sprs32.pt_cr = read_register (regno + 2); | |
1285 | sprs32.pt_lr = read_register (regno + 3); | |
1286 | sprs32.pt_ctr = read_register (regno + 4); | |
1287 | sprs32.pt_xer = read_register (regno + 5); | |
1288 | ||
1289 | if (REGISTER_RAW_SIZE (LAST_UISA_SP_REGNUM)) | |
1290 | sprs32.pt_mq = read_register (LAST_UISA_SP_REGNUM); | |
1291 | ||
1292 | ptrace32 (PTT_WRITE_SPRS, tid, (int *) &sprs32, 0, NULL); | |
1293 | } | |
1294 | } | |
1295 | } | |
1296 | ||
1297 | /* Store gdb's current view of the register set into the thread/process | |
1298 | specified by inferior_ptid. */ | |
1299 | ||
1300 | static void | |
1301 | ops_store_registers (int regno) | |
1302 | { | |
1303 | struct thread_info *thread; | |
1304 | pthdb_tid_t tid; | |
1305 | ||
1306 | if (!PD_TID (inferior_ptid)) | |
1307 | base_ops.to_store_registers (regno); | |
1308 | else | |
1309 | { | |
1310 | thread = find_thread_pid (inferior_ptid); | |
1311 | tid = thread->private->tid; | |
1312 | ||
1313 | if (tid == PTHDB_INVALID_TID) | |
1314 | store_regs_lib (thread->private->pdtid); | |
1315 | else | |
1316 | store_regs_kern (regno, tid); | |
1317 | } | |
1318 | } | |
1319 | ||
1320 | /* Prepare to modify the registers array. */ | |
1321 | ||
1322 | static void | |
1323 | ops_prepare_to_store (void) | |
1324 | { | |
1325 | if (!PD_TID (inferior_ptid)) | |
1326 | base_ops.to_prepare_to_store (); | |
1327 | else | |
1328 | read_register_bytes (0, NULL, REGISTER_BYTES); | |
1329 | } | |
1330 | ||
1331 | /* Transfer LEN bytes of memory from GDB address MYADDR to target address | |
1332 | MEMADDR if WRITE and vice versa otherwise. */ | |
1333 | ||
1334 | static int | |
1335 | ops_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, | |
1336 | struct mem_attrib *attrib, | |
1337 | struct target_ops *target) | |
1338 | { | |
1339 | int n; | |
14fa3751 KB |
1340 | struct cleanup *cleanup = save_inferior_ptid (); |
1341 | ||
1342 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
1343 | n = base_ops.to_xfer_memory (memaddr, myaddr, len, write, attrib, &base_ops); | |
1344 | do_cleanups (cleanup); | |
c11d79f2 | 1345 | |
c11d79f2 KB |
1346 | return n; |
1347 | } | |
1348 | ||
1349 | /* Kill and forget about the inferior process. */ | |
1350 | ||
1351 | static void | |
1352 | ops_kill (void) | |
1353 | { | |
14fa3751 KB |
1354 | struct cleanup *cleanup = save_inferior_ptid (); |
1355 | ||
1356 | inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); | |
1357 | base_ops.to_kill (); | |
1358 | do_cleanups (cleanup); | |
c11d79f2 KB |
1359 | } |
1360 | ||
1361 | /* Clean up after the inferior exits. */ | |
1362 | ||
1363 | static void | |
1364 | ops_mourn_inferior (void) | |
1365 | { | |
1366 | pd_deactivate (); | |
1367 | base_ops.to_mourn_inferior (); | |
1368 | } | |
1369 | ||
1370 | /* Return whether thread PID is still valid. */ | |
1371 | ||
1372 | static int | |
1373 | ops_thread_alive (ptid_t ptid) | |
1374 | { | |
1375 | if (!PD_TID (ptid)) | |
1376 | return base_ops.to_thread_alive (ptid); | |
1377 | ||
1378 | /* We update the thread list every time the child stops, so all valid | |
1379 | threads should be in the thread list. */ | |
1380 | return in_thread_list (ptid); | |
1381 | } | |
1382 | ||
1383 | /* Return a printable representation of composite PID for use in "info | |
1384 | threads" output. */ | |
1385 | ||
1386 | static char * | |
1387 | ops_pid_to_str (ptid_t ptid) | |
1388 | { | |
1389 | static char *ret = NULL; | |
1390 | ||
1391 | if (!PD_TID (ptid)) | |
1392 | return base_ops.to_pid_to_str (ptid); | |
1393 | ||
1394 | /* Free previous return value; a new one will be allocated by | |
1395 | xasprintf(). */ | |
1396 | xfree (ret); | |
1397 | ||
1398 | xasprintf (&ret, "Thread %ld", ptid_get_tid (ptid)); | |
1399 | return ret; | |
1400 | } | |
1401 | ||
1402 | /* Return a printable representation of extra information about THREAD, for | |
1403 | use in "info threads" output. */ | |
1404 | ||
1405 | static char * | |
1406 | ops_extra_thread_info (struct thread_info *thread) | |
1407 | { | |
1408 | struct ui_file *buf; | |
1409 | int status; | |
1410 | pthdb_pthread_t pdtid; | |
1411 | pthdb_tid_t tid; | |
1412 | pthdb_state_t state; | |
1413 | pthdb_suspendstate_t suspendstate; | |
1414 | pthdb_detachstate_t detachstate; | |
1415 | int cancelpend; | |
1416 | long length; | |
1417 | static char *ret = NULL; | |
1418 | ||
1419 | if (!PD_TID (thread->ptid)) | |
1420 | return NULL; | |
1421 | ||
1422 | buf = mem_fileopen (); | |
1423 | ||
1424 | pdtid = thread->private->pdtid; | |
1425 | tid = thread->private->tid; | |
1426 | ||
1427 | if (tid != PTHDB_INVALID_TID) | |
1428 | fprintf_unfiltered (buf, "tid %d", tid); | |
1429 | ||
1430 | status = pthdb_pthread_state (pd_session, pdtid, &state); | |
1431 | if (status != PTHDB_SUCCESS) | |
1432 | state = PST_NOTSUP; | |
1433 | fprintf_unfiltered (buf, ", %s", state2str (state)); | |
1434 | ||
1435 | status = pthdb_pthread_suspendstate (pd_session, pdtid, &suspendstate); | |
1436 | if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED) | |
1437 | fprintf_unfiltered (buf, ", suspended"); | |
1438 | ||
1439 | status = pthdb_pthread_detachstate (pd_session, pdtid, &detachstate); | |
1440 | if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED) | |
1441 | fprintf_unfiltered (buf, ", detached"); | |
1442 | ||
1443 | pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend); | |
1444 | if (status == PTHDB_SUCCESS && cancelpend) | |
1445 | fprintf_unfiltered (buf, ", cancel pending"); | |
1446 | ||
1447 | ui_file_write (buf, "", 1); | |
1448 | ||
1449 | xfree (ret); /* Free old buffer. */ | |
1450 | ||
1451 | ret = ui_file_xstrdup (buf, &length); | |
1452 | ui_file_delete (buf); | |
1453 | ||
1454 | return ret; | |
1455 | } | |
1456 | ||
1457 | /* Initialize target ops. */ | |
1458 | ||
1459 | static void | |
1460 | init_ops (void) | |
1461 | { | |
1462 | ops.to_shortname = "aix-threads"; | |
1463 | ops.to_longname = "AIX pthread support"; | |
1464 | ops.to_doc = "AIX pthread support"; | |
1465 | ||
1466 | ops.to_attach = ops_attach; | |
1467 | ops.to_detach = ops_detach; | |
1468 | ops.to_resume = ops_resume; | |
1469 | ops.to_wait = ops_wait; | |
1470 | ops.to_fetch_registers = ops_fetch_registers; | |
1471 | ops.to_store_registers = ops_store_registers; | |
1472 | ops.to_prepare_to_store = ops_prepare_to_store; | |
1473 | ops.to_xfer_memory = ops_xfer_memory; | |
1474 | /* No need for ops.to_create_inferior, because we activate thread debugging | |
1475 | when the inferior reaches pd_brk_addr. */ | |
1476 | ops.to_kill = ops_kill; | |
1477 | ops.to_mourn_inferior = ops_mourn_inferior; | |
1478 | ops.to_thread_alive = ops_thread_alive; | |
1479 | ops.to_pid_to_str = ops_pid_to_str; | |
1480 | ops.to_extra_thread_info = ops_extra_thread_info; | |
1481 | ops.to_stratum = thread_stratum; | |
1482 | ops.to_magic = OPS_MAGIC; | |
1483 | } | |
1484 | ||
1485 | /* Module startup initialization function, automagically called by | |
1486 | init.c. */ | |
1487 | ||
1488 | void | |
1489 | _initialize_aix_thread (void) | |
1490 | { | |
1491 | init_ops (); | |
1492 | add_target (&ops); | |
1493 | ||
1494 | /* Notice when object files get loaded and unloaded. */ | |
1495 | target_new_objfile_chain = target_new_objfile_hook; | |
1496 | target_new_objfile_hook = new_objfile; | |
8e2c28d4 KB |
1497 | |
1498 | add_show_from_set (add_set_cmd ("aix-thread", no_class, var_zinteger, | |
1499 | (char *) &debug_aix_thread, | |
1500 | "Set debugging of AIX thread module.\n" | |
1501 | "Enables printf debugging output.\n", | |
1502 | &setdebuglist), | |
1503 | &showdebuglist); | |
c11d79f2 | 1504 | } |