1 /* Low level interface for debugging AIX 4.3+ pthreads.
3 Copyright 1999, 2000, 2002 Free Software Foundation, Inc.
4 Written by Nick Duffek <nsd@redhat.com>.
6 This file is part of GDB.
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.
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.
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. */
24 /* This module uses the libpthdebug.a library provided by AIX 4.3+ for
25 debugging pthread applications.
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
32 libpthdebug peculiarities:
34 - pthdb_ptid_pthread() is prototyped in <sys/pthdebug.h>, but
35 it's not documented, and after several calls it stops working
36 and causes other libpthdebug functions to fail.
38 - pthdb_tid_pthread() doesn't always work after
39 pthdb_session_update(), but it does work after cycling through
40 all threads using pthdb_pthread().
45 #include "gdb_assert.h"
46 #include "gdbthread.h"
52 #include "gdb_string.h"
55 #include <sys/types.h>
56 #include <sys/ptrace.h>
59 #include <sys/pthdebug.h>
61 /* Whether to emit debugging output. */
62 static int debug_aix_thread
;
64 /* In AIX 5.1, functions use pthdb_tid_t instead of tid_t. */
65 #ifndef PTHDB_VERSION_3
66 #define pthdb_tid_t tid_t
69 /* Return whether to treat PID as a debuggable thread id. */
71 #define PD_TID(ptid) (pd_active && ptid_get_tid (ptid) != 0)
73 /* Build a thread ptid. */
74 #define BUILD_THREAD(TID, PID) ptid_build (PID, 0, TID)
76 /* Build and lwp ptid. */
77 #define BUILD_LWP(LWP, PID) MERGEPID (PID, LWP)
79 /* pthdb_user_t value that we pass to pthdb functions. 0 causes
80 PTHDB_BAD_USER errors, so use 1. */
84 /* Success and failure values returned by pthdb callbacks. */
86 #define PDC_SUCCESS PTHDB_SUCCESS
87 #define PDC_FAILURE PTHDB_CALLBACK
89 /* Private data attached to each element in GDB's thread list. */
91 struct private_thread_info
{
92 pthdb_pthread_t pdtid
; /* thread's libpthdebug id */
93 pthdb_tid_t tid
; /* kernel thread id */
96 /* Information about a thread of which libpthdebug is aware. */
99 pthdb_pthread_t pdtid
;
104 /* This module's target-specific operations, active while pd_able is true. */
106 static struct target_ops aix_thread_ops
;
108 /* Copy of the target over which ops is pushed. This is more
109 convenient than a pointer to deprecated_child_ops or core_ops,
110 because they lack current_target's default callbacks. */
112 static struct target_ops base_target
;
114 /* Address of the function that libpthread will call when libpthdebug
115 is ready to be initialized. */
117 static CORE_ADDR pd_brk_addr
;
119 /* Whether the current application is debuggable by pthdb. */
121 static int pd_able
= 0;
123 /* Whether a threaded application is being debugged. */
125 static int pd_active
= 0;
127 /* Whether the current architecture is 64-bit.
128 Only valid when pd_able is true. */
132 /* Saved pointer to previous owner of
133 deprecated_target_new_objfile_hook. */
135 static void (*target_new_objfile_chain
)(struct objfile
*);
137 /* Forward declarations for pthdb callbacks. */
139 static int pdc_symbol_addrs (pthdb_user_t
, pthdb_symbol_t
*, int);
140 static int pdc_read_data (pthdb_user_t
, void *, pthdb_addr_t
, size_t);
141 static int pdc_write_data (pthdb_user_t
, void *, pthdb_addr_t
, size_t);
142 static int pdc_read_regs (pthdb_user_t user
, pthdb_tid_t tid
,
143 unsigned long long flags
,
144 pthdb_context_t
*context
);
145 static int pdc_write_regs (pthdb_user_t user
, pthdb_tid_t tid
,
146 unsigned long long flags
,
147 pthdb_context_t
*context
);
148 static int pdc_alloc (pthdb_user_t
, size_t, void **);
149 static int pdc_realloc (pthdb_user_t
, void *, size_t, void **);
150 static int pdc_dealloc (pthdb_user_t
, void *);
152 /* pthdb callbacks. */
154 static pthdb_callbacks_t pd_callbacks
= {
166 /* Current pthdb session. */
168 static pthdb_session_t pd_session
;
170 /* Return a printable representation of pthdebug function return
174 pd_status2str (int status
)
178 case PTHDB_SUCCESS
: return "SUCCESS";
179 case PTHDB_NOSYS
: return "NOSYS";
180 case PTHDB_NOTSUP
: return "NOTSUP";
181 case PTHDB_BAD_VERSION
: return "BAD_VERSION";
182 case PTHDB_BAD_USER
: return "BAD_USER";
183 case PTHDB_BAD_SESSION
: return "BAD_SESSION";
184 case PTHDB_BAD_MODE
: return "BAD_MODE";
185 case PTHDB_BAD_FLAGS
: return "BAD_FLAGS";
186 case PTHDB_BAD_CALLBACK
: return "BAD_CALLBACK";
187 case PTHDB_BAD_POINTER
: return "BAD_POINTER";
188 case PTHDB_BAD_CMD
: return "BAD_CMD";
189 case PTHDB_BAD_PTHREAD
: return "BAD_PTHREAD";
190 case PTHDB_BAD_ATTR
: return "BAD_ATTR";
191 case PTHDB_BAD_MUTEX
: return "BAD_MUTEX";
192 case PTHDB_BAD_MUTEXATTR
: return "BAD_MUTEXATTR";
193 case PTHDB_BAD_COND
: return "BAD_COND";
194 case PTHDB_BAD_CONDATTR
: return "BAD_CONDATTR";
195 case PTHDB_BAD_RWLOCK
: return "BAD_RWLOCK";
196 case PTHDB_BAD_RWLOCKATTR
: return "BAD_RWLOCKATTR";
197 case PTHDB_BAD_KEY
: return "BAD_KEY";
198 case PTHDB_BAD_PTID
: return "BAD_PTID";
199 case PTHDB_BAD_TID
: return "BAD_TID";
200 case PTHDB_CALLBACK
: return "CALLBACK";
201 case PTHDB_CONTEXT
: return "CONTEXT";
202 case PTHDB_HELD
: return "HELD";
203 case PTHDB_NOT_HELD
: return "NOT_HELD";
204 case PTHDB_MEMORY
: return "MEMORY";
205 case PTHDB_NOT_PTHREADED
: return "NOT_PTHREADED";
206 case PTHDB_SYMBOL
: return "SYMBOL";
207 case PTHDB_NOT_AVAIL
: return "NOT_AVAIL";
208 case PTHDB_INTERNAL
: return "INTERNAL";
209 default: return "UNKNOWN";
213 /* A call to ptrace(REQ, ID, ...) just returned RET. Check for
214 exceptional conditions and either return nonlocally or else return
215 1 for success and 0 for failure. */
218 ptrace_check (int req
, int id
, int ret
)
220 if (ret
== 0 && !errno
)
223 /* According to ptrace(2), ptrace may fail with EPERM if "the
224 Identifier parameter corresponds to a kernel thread which is
225 stopped in kernel mode and whose computational state cannot be
226 read or written." This happens quite often with register reads. */
233 if (ret
== -1 && errno
== EPERM
)
235 if (debug_aix_thread
)
236 fprintf_unfiltered (gdb_stdlog
,
237 "ptrace (%d, %d) = %d (errno = %d)\n",
238 req
, id
, ret
, errno
);
239 return ret
== -1 ? 0 : 1;
243 error ("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)",
244 req
, id
, ret
, errno
, safe_strerror (errno
));
245 return 0; /* Not reached. */
248 /* Call ptracex (REQ, ID, ADDR, DATA, BUF). Return success. */
251 ptrace64aix (int req
, int id
, long long addr
, int data
, int *buf
)
254 return ptrace_check (req
, id
, ptracex (req
, id
, addr
, data
, buf
));
257 /* Call ptrace (REQ, ID, ADDR, DATA, BUF). Return success. */
260 ptrace32 (int req
, int id
, int *addr
, int data
, int *buf
)
263 return ptrace_check (req
, id
,
264 ptrace (req
, id
, (int *) addr
, data
, buf
));
267 /* If *PIDP is a composite process/thread id, convert it to a
271 pid_to_prc (ptid_t
*ptidp
)
277 *ptidp
= pid_to_ptid (PIDGET (ptid
));
280 /* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to
281 the address of SYMBOLS[<i>].name. */
284 pdc_symbol_addrs (pthdb_user_t user
, pthdb_symbol_t
*symbols
, int count
)
286 struct minimal_symbol
*ms
;
290 if (debug_aix_thread
)
291 fprintf_unfiltered (gdb_stdlog
,
292 "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)\n",
293 user
, (long) symbols
, count
);
295 for (i
= 0; i
< count
; i
++)
297 name
= symbols
[i
].name
;
298 if (debug_aix_thread
)
299 fprintf_unfiltered (gdb_stdlog
,
300 " symbols[%d].name = \"%s\"\n", i
, name
);
306 if (!(ms
= lookup_minimal_symbol (name
, NULL
, NULL
)))
308 if (debug_aix_thread
)
309 fprintf_unfiltered (gdb_stdlog
, " returning PDC_FAILURE\n");
312 symbols
[i
].addr
= SYMBOL_VALUE_ADDRESS (ms
);
314 if (debug_aix_thread
)
315 fprintf_unfiltered (gdb_stdlog
, " symbols[%d].addr = %s\n",
316 i
, hex_string (symbols
[i
].addr
));
318 if (debug_aix_thread
)
319 fprintf_unfiltered (gdb_stdlog
, " returning PDC_SUCCESS\n");
323 /* Read registers call back function should be able to read the
324 context information of a debuggee kernel thread from an active
325 process or from a core file. The information should be formatted
326 in context64 form for both 32-bit and 64-bit process.
327 If successful return 0, else non-zero is returned. */
330 pdc_read_regs (pthdb_user_t user
,
332 unsigned long long flags
,
333 pthdb_context_t
*context
)
335 /* This function doesn't appear to be used, so we could probably
336 just return 0 here. HOWEVER, if it is not defined, the OS will
337 complain and several thread debug functions will fail. In case
338 this is needed, I have implemented what I think it should do,
339 however this code is untested. */
341 uint64_t gprs64
[ppc_num_gprs
];
342 uint32_t gprs32
[ppc_num_gprs
];
343 double fprs
[ppc_num_fprs
];
344 struct ptxsprs sprs64
;
345 struct ptsprs sprs32
;
347 if (debug_aix_thread
)
348 fprintf_unfiltered (gdb_stdlog
, "pdc_read_regs tid=%d flags=%s\n",
349 (int) tid
, hex_string (flags
));
351 /* General-purpose registers. */
352 if (flags
& PTHDB_FLAG_GPRS
)
356 if (!ptrace64aix (PTT_READ_GPRS
, tid
,
357 (unsigned long) gprs64
, 0, NULL
))
358 memset (gprs64
, 0, sizeof (gprs64
));
359 memcpy (context
->gpr
, gprs64
, sizeof(gprs64
));
363 if (!ptrace32 (PTT_READ_GPRS
, tid
, gprs32
, 0, NULL
))
364 memset (gprs32
, 0, sizeof (gprs32
));
365 memcpy (context
->gpr
, gprs32
, sizeof(gprs32
));
369 /* Floating-point registers. */
370 if (flags
& PTHDB_FLAG_FPRS
)
372 if (!ptrace32 (PTT_READ_FPRS
, tid
, (int *) fprs
, 0, NULL
))
373 memset (fprs
, 0, sizeof (fprs
));
374 memcpy (context
->fpr
, fprs
, sizeof(fprs
));
377 /* Special-purpose registers. */
378 if (flags
& PTHDB_FLAG_SPRS
)
382 if (!ptrace64aix (PTT_READ_SPRS
, tid
,
383 (unsigned long) &sprs64
, 0, NULL
))
384 memset (&sprs64
, 0, sizeof (sprs64
));
385 memcpy (&context
->msr
, &sprs64
, sizeof(sprs64
));
389 if (!ptrace32 (PTT_READ_SPRS
, tid
, (int *) &sprs32
, 0, NULL
))
390 memset (&sprs32
, 0, sizeof (sprs32
));
391 memcpy (&context
->msr
, &sprs32
, sizeof(sprs32
));
397 /* Write register function should be able to write requested context
398 information to specified debuggee's kernel thread id.
399 If successful return 0, else non-zero is returned. */
402 pdc_write_regs (pthdb_user_t user
,
404 unsigned long long flags
,
405 pthdb_context_t
*context
)
407 /* This function doesn't appear to be used, so we could probably
408 just return 0 here. HOWEVER, if it is not defined, the OS will
409 complain and several thread debug functions will fail. In case
410 this is needed, I have implemented what I think it should do,
411 however this code is untested. */
413 if (debug_aix_thread
)
414 fprintf_unfiltered (gdb_stdlog
, "pdc_write_regs tid=%d flags=%s\n",
415 (int) tid
, hex_string (flags
));
417 /* General-purpose registers. */
418 if (flags
& PTHDB_FLAG_GPRS
)
421 ptrace64aix (PTT_WRITE_GPRS
, tid
,
422 (unsigned long) context
->gpr
, 0, NULL
);
424 ptrace32 (PTT_WRITE_GPRS
, tid
, (int *) context
->gpr
, 0, NULL
);
427 /* Floating-point registers. */
428 if (flags
& PTHDB_FLAG_FPRS
)
430 ptrace32 (PTT_WRITE_FPRS
, tid
, (int *) context
->fpr
, 0, NULL
);
433 /* Special-purpose registers. */
434 if (flags
& PTHDB_FLAG_SPRS
)
438 ptrace64aix (PTT_WRITE_SPRS
, tid
,
439 (unsigned long) &context
->msr
, 0, NULL
);
443 ptrace32 (PTT_WRITE_SPRS
, tid
, (int *) &context
->msr
, 0, NULL
);
449 /* pthdb callback: read LEN bytes from process ADDR into BUF. */
452 pdc_read_data (pthdb_user_t user
, void *buf
,
453 pthdb_addr_t addr
, size_t len
)
457 if (debug_aix_thread
)
458 fprintf_unfiltered (gdb_stdlog
,
459 "pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
460 user
, (long) buf
, hex_string (addr
), len
);
462 status
= target_read_memory (addr
, buf
, len
);
463 ret
= status
== 0 ? PDC_SUCCESS
: PDC_FAILURE
;
465 if (debug_aix_thread
)
466 fprintf_unfiltered (gdb_stdlog
, " status=%d, returning %s\n",
467 status
, pd_status2str (ret
));
471 /* pthdb callback: write LEN bytes from BUF to process ADDR. */
474 pdc_write_data (pthdb_user_t user
, void *buf
,
475 pthdb_addr_t addr
, size_t len
)
479 if (debug_aix_thread
)
480 fprintf_unfiltered (gdb_stdlog
,
481 "pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
482 user
, (long) buf
, hex_string (addr
), len
);
484 status
= target_write_memory (addr
, buf
, len
);
485 ret
= status
== 0 ? PDC_SUCCESS
: PDC_FAILURE
;
487 if (debug_aix_thread
)
488 fprintf_unfiltered (gdb_stdlog
, " status=%d, returning %s\n", status
,
489 pd_status2str (ret
));
493 /* pthdb callback: allocate a LEN-byte buffer and store a pointer to it
497 pdc_alloc (pthdb_user_t user
, size_t len
, void **bufp
)
499 if (debug_aix_thread
)
500 fprintf_unfiltered (gdb_stdlog
,
501 "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n",
502 user
, len
, (long) bufp
);
503 *bufp
= xmalloc (len
);
504 if (debug_aix_thread
)
505 fprintf_unfiltered (gdb_stdlog
,
506 " malloc returned 0x%lx\n", (long) *bufp
);
508 /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never
511 return *bufp
? PDC_SUCCESS
: PDC_FAILURE
;
514 /* pthdb callback: reallocate BUF, which was allocated by the alloc or
515 realloc callback, so that it contains LEN bytes, and store a
516 pointer to the result in BUFP. */
519 pdc_realloc (pthdb_user_t user
, void *buf
, size_t len
, void **bufp
)
521 if (debug_aix_thread
)
522 fprintf_unfiltered (gdb_stdlog
,
523 "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n",
524 user
, (long) buf
, len
, (long) bufp
);
525 *bufp
= xrealloc (buf
, len
);
526 if (debug_aix_thread
)
527 fprintf_unfiltered (gdb_stdlog
,
528 " realloc returned 0x%lx\n", (long) *bufp
);
529 return *bufp
? PDC_SUCCESS
: PDC_FAILURE
;
532 /* pthdb callback: free BUF, which was allocated by the alloc or
536 pdc_dealloc (pthdb_user_t user
, void *buf
)
538 if (debug_aix_thread
)
539 fprintf_unfiltered (gdb_stdlog
,
540 "pdc_free (user = %ld, buf = 0x%lx)\n", user
,
546 /* Return a printable representation of pthread STATE. */
549 state2str (pthdb_state_t state
)
553 case PST_IDLE
: return "idle"; /* being created */
554 case PST_RUN
: return "running"; /* running */
555 case PST_SLEEP
: return "sleeping"; /* awaiting an event */
556 case PST_READY
: return "ready"; /* runnable */
557 case PST_TERM
: return "finished"; /* awaiting a join/detach */
558 default: return "unknown";
562 /* qsort() comparison function for sorting pd_thread structs by pthid. */
565 pcmp (const void *p1v
, const void *p2v
)
567 struct pd_thread
*p1
= (struct pd_thread
*) p1v
;
568 struct pd_thread
*p2
= (struct pd_thread
*) p2v
;
569 return p1
->pthid
< p2
->pthid
? -1 : p1
->pthid
> p2
->pthid
;
572 /* iterate_over_threads() callback for counting GDB threads. */
575 giter_count (struct thread_info
*thread
, void *countp
)
581 /* iterate_over_threads() callback for accumulating GDB thread pids. */
584 giter_accum (struct thread_info
*thread
, void *bufp
)
586 **(struct thread_info
***) bufp
= thread
;
587 (*(struct thread_info
***) bufp
)++;
591 /* ptid comparison function */
594 ptid_cmp (ptid_t ptid1
, ptid_t ptid2
)
598 if (ptid_get_pid (ptid1
) < ptid_get_pid (ptid2
))
600 else if (ptid_get_pid (ptid1
) > ptid_get_pid (ptid2
))
602 else if (ptid_get_tid (ptid1
) < ptid_get_tid (ptid2
))
604 else if (ptid_get_tid (ptid1
) > ptid_get_tid (ptid2
))
606 else if (ptid_get_lwp (ptid1
) < ptid_get_lwp (ptid2
))
608 else if (ptid_get_lwp (ptid1
) > ptid_get_lwp (ptid2
))
614 /* qsort() comparison function for sorting thread_info structs by pid. */
617 gcmp (const void *t1v
, const void *t2v
)
619 struct thread_info
*t1
= *(struct thread_info
**) t1v
;
620 struct thread_info
*t2
= *(struct thread_info
**) t2v
;
621 return ptid_cmp (t1
->ptid
, t2
->ptid
);
624 /* Search through the list of all kernel threads for the thread
625 that has stopped on a SIGTRAP signal, and return its TID.
626 Return 0 if none found. */
629 get_signaled_thread (void)
631 struct thrdsinfo64 thrinf
;
632 pthdb_tid_t ktid
= 0;
635 /* getthrds(3) isn't prototyped in any AIX 4.3.3 #include file. */
636 extern int getthrds (pid_t
, struct thrdsinfo64
*,
637 int, pthdb_tid_t
*, int);
641 if (getthrds (PIDGET (inferior_ptid
), &thrinf
,
642 sizeof (thrinf
), &ktid
, 1) != 1)
645 if (thrinf
.ti_cursig
== SIGTRAP
)
646 return thrinf
.ti_tid
;
649 /* Didn't find any thread stopped on a SIGTRAP signal. */
653 /* Synchronize GDB's thread list with libpthdebug's.
655 There are some benefits of doing this every time the inferior stops:
657 - allows users to run thread-specific commands without needing to
658 run "info threads" first
660 - helps pthdb_tid_pthread() work properly (see "libpthdebug
661 peculiarities" at the top of this module)
663 - simplifies the demands placed on libpthdebug, which seems to
664 have difficulty with certain call patterns */
667 sync_threadlists (void)
669 int cmd
, status
, infpid
;
670 int pcount
, psize
, pi
, gcount
, gi
;
671 struct pd_thread
*pbuf
;
672 struct thread_info
**gbuf
, **g
, *thread
;
673 pthdb_pthread_t pdtid
;
677 /* Accumulate an array of libpthdebug threads sorted by pthread id. */
681 pbuf
= (struct pd_thread
*) xmalloc (psize
* sizeof *pbuf
);
683 for (cmd
= PTHDB_LIST_FIRST
;; cmd
= PTHDB_LIST_NEXT
)
685 status
= pthdb_pthread (pd_session
, &pdtid
, cmd
);
686 if (status
!= PTHDB_SUCCESS
|| pdtid
== PTHDB_INVALID_PTHREAD
)
689 status
= pthdb_pthread_ptid (pd_session
, pdtid
, &pthid
);
690 if (status
!= PTHDB_SUCCESS
|| pthid
== PTHDB_INVALID_PTID
)
696 pbuf
= (struct pd_thread
*) xrealloc (pbuf
,
697 psize
* sizeof *pbuf
);
699 pbuf
[pcount
].pdtid
= pdtid
;
700 pbuf
[pcount
].pthid
= pthid
;
704 for (pi
= 0; pi
< pcount
; pi
++)
706 status
= pthdb_pthread_tid (pd_session
, pbuf
[pi
].pdtid
, &tid
);
707 if (status
!= PTHDB_SUCCESS
)
708 tid
= PTHDB_INVALID_TID
;
712 qsort (pbuf
, pcount
, sizeof *pbuf
, pcmp
);
714 /* Accumulate an array of GDB threads sorted by pid. */
717 iterate_over_threads (giter_count
, &gcount
);
718 g
= gbuf
= (struct thread_info
**) xmalloc (gcount
* sizeof *gbuf
);
719 iterate_over_threads (giter_accum
, &g
);
720 qsort (gbuf
, gcount
, sizeof *gbuf
, gcmp
);
722 /* Apply differences between the two arrays to GDB's thread list. */
724 infpid
= PIDGET (inferior_ptid
);
725 for (pi
= gi
= 0; pi
< pcount
|| gi
< gcount
;)
729 delete_thread (gbuf
[gi
]->ptid
);
732 else if (gi
== gcount
)
734 thread
= add_thread (BUILD_THREAD (pbuf
[pi
].pthid
, infpid
));
735 thread
->private = xmalloc (sizeof (struct private_thread_info
));
736 thread
->private->pdtid
= pbuf
[pi
].pdtid
;
737 thread
->private->tid
= pbuf
[pi
].tid
;
745 pptid
= BUILD_THREAD (pbuf
[pi
].pthid
, infpid
);
746 gptid
= gbuf
[gi
]->ptid
;
747 pdtid
= pbuf
[pi
].pdtid
;
750 cmp_result
= ptid_cmp (pptid
, gptid
);
754 gbuf
[gi
]->private->pdtid
= pdtid
;
755 gbuf
[gi
]->private->tid
= tid
;
759 else if (cmp_result
> 0)
761 delete_thread (gptid
);
766 thread
= add_thread (pptid
);
767 thread
->private = xmalloc (sizeof (struct private_thread_info
));
768 thread
->private->pdtid
= pdtid
;
769 thread
->private->tid
= tid
;
779 /* Iterate_over_threads() callback for locating a thread, using
780 the TID of its associated kernel thread. */
783 iter_tid (struct thread_info
*thread
, void *tidp
)
785 const pthdb_tid_t tid
= *(pthdb_tid_t
*)tidp
;
787 return (thread
->private->tid
== tid
);
790 /* Synchronize libpthdebug's state with the inferior and with GDB,
791 generate a composite process/thread <pid> for the current thread,
792 set inferior_ptid to <pid> if SET_INFPID, and return <pid>. */
795 pd_update (int set_infpid
)
800 struct thread_info
*thread
= NULL
;
803 return inferior_ptid
;
805 status
= pthdb_session_update (pd_session
);
806 if (status
!= PTHDB_SUCCESS
)
807 return inferior_ptid
;
811 /* Define "current thread" as one that just received a trap signal. */
813 tid
= get_signaled_thread ();
815 thread
= iterate_over_threads (iter_tid
, &tid
);
817 ptid
= inferior_ptid
;
822 inferior_ptid
= ptid
;
827 /* Try to start debugging threads in the current process.
828 If successful and SET_INFPID, set inferior_ptid to reflect the
832 pd_activate (int set_infpid
)
836 status
= pthdb_session_init (PD_USER
, arch64
? PEM_64BIT
: PEM_32BIT
,
837 PTHDB_FLAG_REGS
, &pd_callbacks
,
839 if (status
!= PTHDB_SUCCESS
)
841 return inferior_ptid
;
844 return pd_update (set_infpid
);
847 /* Undo the effects of pd_activate(). */
854 pthdb_session_destroy (pd_session
);
856 pid_to_prc (&inferior_ptid
);
860 /* An object file has just been loaded. Check whether the current
861 application is pthreaded, and if so, prepare for thread debugging. */
868 struct minimal_symbol
*ms
;
870 /* Don't initialize twice. */
874 /* Check application word size. */
875 arch64
= register_size (current_gdbarch
, 0) == 8;
877 /* Check whether the application is pthreaded. */
879 status
= pthdb_session_pthreaded (PD_USER
, PTHDB_FLAG_REGS
,
880 &pd_callbacks
, &stub_name
);
881 if ((status
!= PTHDB_SUCCESS
&&
882 status
!= PTHDB_NOT_PTHREADED
) || !stub_name
)
885 /* Set a breakpoint on the returned stub function. */
886 if (!(ms
= lookup_minimal_symbol (stub_name
, NULL
, NULL
)))
888 pd_brk_addr
= SYMBOL_VALUE_ADDRESS (ms
);
889 if (!create_thread_event_breakpoint (pd_brk_addr
))
892 /* Prepare for thread debugging. */
893 base_target
= current_target
;
894 push_target (&aix_thread_ops
);
897 /* If we're debugging a core file or an attached inferior, the
898 pthread library may already have been initialized, so try to
899 activate thread debugging. */
903 /* Undo the effects of pd_enable(). */
913 unpush_target (&aix_thread_ops
);
916 /* deprecated_target_new_objfile_hook callback.
918 If OBJFILE is non-null, check whether a threaded application is
919 being debugged, and if so, prepare for thread debugging.
921 If OBJFILE is null, stop debugging threads. */
924 new_objfile (struct objfile
*objfile
)
931 if (target_new_objfile_chain
)
932 target_new_objfile_chain (objfile
);
935 /* Attach to process specified by ARGS. */
938 aix_thread_attach (char *args
, int from_tty
)
940 base_target
.to_attach (args
, from_tty
);
944 /* Detach from the process attached to by aix_thread_attach(). */
947 aix_thread_detach (char *args
, int from_tty
)
950 base_target
.to_detach (args
, from_tty
);
953 /* Tell the inferior process to continue running thread PID if != -1
954 and all threads otherwise. */
957 aix_thread_resume (ptid_t ptid
, int step
, enum target_signal sig
)
959 struct thread_info
*thread
;
964 struct cleanup
*cleanup
= save_inferior_ptid ();
965 inferior_ptid
= pid_to_ptid (PIDGET (inferior_ptid
));
966 base_target
.to_resume (ptid
, step
, sig
);
967 do_cleanups (cleanup
);
971 thread
= find_thread_pid (ptid
);
973 error ("aix-thread resume: unknown pthread %ld",
976 tid
[0] = thread
->private->tid
;
977 if (tid
[0] == PTHDB_INVALID_TID
)
978 error ("aix-thread resume: no tid for pthread %ld",
983 ptrace64aix (PTT_CONTINUE
, tid
[0], 1,
984 target_signal_to_host (sig
), (int *) tid
);
986 ptrace32 (PTT_CONTINUE
, tid
[0], (int *) 1,
987 target_signal_to_host (sig
), (int *) tid
);
991 /* Wait for thread/process ID if != -1 or for any thread otherwise.
992 If an error occurs, return -1, else return the pid of the stopped
996 aix_thread_wait (ptid_t ptid
, struct target_waitstatus
*status
)
998 struct cleanup
*cleanup
= save_inferior_ptid ();
1002 inferior_ptid
= pid_to_ptid (PIDGET (inferior_ptid
));
1003 ptid
= base_target
.to_wait (ptid
, status
);
1004 do_cleanups (cleanup
);
1006 if (PIDGET (ptid
) == -1)
1007 return pid_to_ptid (-1);
1009 /* Check whether libpthdebug might be ready to be initialized. */
1010 if (!pd_active
&& status
->kind
== TARGET_WAITKIND_STOPPED
&&
1011 status
->value
.sig
== TARGET_SIGNAL_TRAP
&&
1012 read_pc_pid (ptid
) - DECR_PC_AFTER_BREAK
== pd_brk_addr
)
1013 return pd_activate (0);
1015 return pd_update (0);
1018 /* Record that the 64-bit general-purpose registers contain VALS. */
1021 supply_gprs64 (uint64_t *vals
)
1023 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1026 for (regno
= 0; regno
< ppc_num_gprs
; regno
++)
1027 regcache_raw_supply (current_regcache
, tdep
->ppc_gp0_regnum
+ regno
,
1028 (char *) (vals
+ regno
));
1031 /* Record that 32-bit register REGNO contains VAL. */
1034 supply_reg32 (int regno
, uint32_t val
)
1036 regcache_raw_supply (current_regcache
, regno
, (char *) &val
);
1039 /* Record that the floating-point registers contain VALS. */
1042 supply_fprs (double *vals
)
1044 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1047 /* This function should never be called on architectures without
1048 floating-point registers. */
1049 gdb_assert (ppc_floating_point_unit_p (current_gdbarch
));
1051 for (regno
= 0; regno
< ppc_num_fprs
; regno
++)
1052 regcache_raw_supply (current_regcache
, regno
+ tdep
->ppc_fp0_regnum
,
1053 (char *) (vals
+ regno
));
1056 /* Predicate to test whether given register number is a "special" register. */
1058 special_register_p (int regno
)
1060 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1062 return regno
== PC_REGNUM
1063 || regno
== tdep
->ppc_ps_regnum
1064 || regno
== tdep
->ppc_cr_regnum
1065 || regno
== tdep
->ppc_lr_regnum
1066 || regno
== tdep
->ppc_ctr_regnum
1067 || regno
== tdep
->ppc_xer_regnum
1068 || (tdep
->ppc_fpscr_regnum
>= 0 && regno
== tdep
->ppc_fpscr_regnum
)
1069 || (tdep
->ppc_mq_regnum
>= 0 && regno
== tdep
->ppc_mq_regnum
);
1073 /* Record that the special registers contain the specified 64-bit and
1077 supply_sprs64 (uint64_t iar
, uint64_t msr
, uint32_t cr
,
1078 uint64_t lr
, uint64_t ctr
, uint32_t xer
,
1081 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1083 regcache_raw_supply (current_regcache
, PC_REGNUM
, (char *) &iar
);
1084 regcache_raw_supply (current_regcache
, tdep
->ppc_ps_regnum
, (char *) &msr
);
1085 regcache_raw_supply (current_regcache
, tdep
->ppc_cr_regnum
, (char *) &cr
);
1086 regcache_raw_supply (current_regcache
, tdep
->ppc_lr_regnum
, (char *) &lr
);
1087 regcache_raw_supply (current_regcache
, tdep
->ppc_ctr_regnum
, (char *) &ctr
);
1088 regcache_raw_supply (current_regcache
, tdep
->ppc_xer_regnum
, (char *) &xer
);
1089 if (tdep
->ppc_fpscr_regnum
>= 0)
1090 regcache_raw_supply (current_regcache
, tdep
->ppc_fpscr_regnum
,
1094 /* Record that the special registers contain the specified 32-bit
1098 supply_sprs32 (uint32_t iar
, uint32_t msr
, uint32_t cr
,
1099 uint32_t lr
, uint32_t ctr
, uint32_t xer
,
1102 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1104 regcache_raw_supply (current_regcache
, PC_REGNUM
, (char *) &iar
);
1105 regcache_raw_supply (current_regcache
, tdep
->ppc_ps_regnum
, (char *) &msr
);
1106 regcache_raw_supply (current_regcache
, tdep
->ppc_cr_regnum
, (char *) &cr
);
1107 regcache_raw_supply (current_regcache
, tdep
->ppc_lr_regnum
, (char *) &lr
);
1108 regcache_raw_supply (current_regcache
, tdep
->ppc_ctr_regnum
, (char *) &ctr
);
1109 regcache_raw_supply (current_regcache
, tdep
->ppc_xer_regnum
, (char *) &xer
);
1110 if (tdep
->ppc_fpscr_regnum
>= 0)
1111 regcache_raw_supply (current_regcache
, tdep
->ppc_fpscr_regnum
,
1115 /* Fetch all registers from pthread PDTID, which doesn't have a kernel
1118 There's no way to query a single register from a non-kernel
1119 pthread, so there's no need for a single-register version of this
1123 fetch_regs_user_thread (pthdb_pthread_t pdtid
)
1125 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1127 pthdb_context_t ctx
;
1129 if (debug_aix_thread
)
1130 fprintf_unfiltered (gdb_stdlog
,
1131 "fetch_regs_user_thread %lx\n", (long) pdtid
);
1132 status
= pthdb_pthread_context (pd_session
, pdtid
, &ctx
);
1133 if (status
!= PTHDB_SUCCESS
)
1134 error ("aix-thread: fetch_registers: pthdb_pthread_context returned %s",
1135 pd_status2str (status
));
1137 /* General-purpose registers. */
1140 supply_gprs64 (ctx
.gpr
);
1142 for (i
= 0; i
< ppc_num_gprs
; i
++)
1143 supply_reg32 (tdep
->ppc_gp0_regnum
+ i
, ctx
.gpr
[i
]);
1145 /* Floating-point registers. */
1147 if (ppc_floating_point_unit_p (current_gdbarch
))
1148 supply_fprs (ctx
.fpr
);
1150 /* Special registers. */
1153 supply_sprs64 (ctx
.iar
, ctx
.msr
, ctx
.cr
, ctx
.lr
, ctx
.ctr
, ctx
.xer
,
1156 supply_sprs32 (ctx
.iar
, ctx
.msr
, ctx
.cr
, ctx
.lr
, ctx
.ctr
, ctx
.xer
,
1160 /* Fetch register REGNO if != -1 or all registers otherwise from
1163 AIX provides a way to query all of a kernel thread's GPRs, FPRs, or
1164 SPRs, but there's no way to query individual registers within those
1165 groups. Therefore, if REGNO != -1, this function fetches an entire
1168 Unfortunately, kernel thread register queries often fail with
1169 EPERM, indicating that the thread is in kernel space. This breaks
1170 backtraces of threads other than the current one. To make that
1171 breakage obvious without throwing an error to top level (which is
1172 bad e.g. during "info threads" output), zero registers that can't
1176 fetch_regs_kernel_thread (int regno
, pthdb_tid_t tid
)
1178 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1179 uint64_t gprs64
[ppc_num_gprs
];
1180 uint32_t gprs32
[ppc_num_gprs
];
1181 double fprs
[ppc_num_fprs
];
1182 struct ptxsprs sprs64
;
1183 struct ptsprs sprs32
;
1186 if (debug_aix_thread
)
1187 fprintf_unfiltered (gdb_stdlog
,
1188 "fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n",
1189 (long) tid
, regno
, arch64
);
1191 /* General-purpose registers. */
1193 || (tdep
->ppc_gp0_regnum
<= regno
1194 && regno
< tdep
->ppc_gp0_regnum
+ ppc_num_gprs
))
1198 if (!ptrace64aix (PTT_READ_GPRS
, tid
,
1199 (unsigned long) gprs64
, 0, NULL
))
1200 memset (gprs64
, 0, sizeof (gprs64
));
1201 supply_gprs64 (gprs64
);
1205 if (!ptrace32 (PTT_READ_GPRS
, tid
, gprs32
, 0, NULL
))
1206 memset (gprs32
, 0, sizeof (gprs32
));
1207 for (i
= 0; i
< ppc_num_gprs
; i
++)
1208 supply_reg32 (tdep
->ppc_gp0_regnum
+ i
, gprs32
[i
]);
1212 /* Floating-point registers. */
1214 if (ppc_floating_point_unit_p (current_gdbarch
)
1216 || (regno
>= tdep
->ppc_fp0_regnum
1217 && regno
< tdep
->ppc_fp0_regnum
+ ppc_num_fprs
)))
1219 if (!ptrace32 (PTT_READ_FPRS
, tid
, (int *) fprs
, 0, NULL
))
1220 memset (fprs
, 0, sizeof (fprs
));
1224 /* Special-purpose registers. */
1226 if (regno
== -1 || special_register_p (regno
))
1230 if (!ptrace64aix (PTT_READ_SPRS
, tid
,
1231 (unsigned long) &sprs64
, 0, NULL
))
1232 memset (&sprs64
, 0, sizeof (sprs64
));
1233 supply_sprs64 (sprs64
.pt_iar
, sprs64
.pt_msr
, sprs64
.pt_cr
,
1234 sprs64
.pt_lr
, sprs64
.pt_ctr
, sprs64
.pt_xer
,
1239 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1241 if (!ptrace32 (PTT_READ_SPRS
, tid
, (int *) &sprs32
, 0, NULL
))
1242 memset (&sprs32
, 0, sizeof (sprs32
));
1243 supply_sprs32 (sprs32
.pt_iar
, sprs32
.pt_msr
, sprs32
.pt_cr
,
1244 sprs32
.pt_lr
, sprs32
.pt_ctr
, sprs32
.pt_xer
,
1247 if (tdep
->ppc_mq_regnum
>= 0)
1248 regcache_raw_supply (current_regcache
, tdep
->ppc_mq_regnum
,
1249 (char *) &sprs32
.pt_mq
);
1254 /* Fetch register REGNO if != -1 or all registers otherwise in the
1255 thread/process specified by inferior_ptid. */
1258 aix_thread_fetch_registers (int regno
)
1260 struct thread_info
*thread
;
1263 if (!PD_TID (inferior_ptid
))
1264 base_target
.to_fetch_registers (regno
);
1267 thread
= find_thread_pid (inferior_ptid
);
1268 tid
= thread
->private->tid
;
1270 if (tid
== PTHDB_INVALID_TID
)
1271 fetch_regs_user_thread (thread
->private->pdtid
);
1273 fetch_regs_kernel_thread (regno
, tid
);
1277 /* Store the gp registers into an array of uint32_t or uint64_t. */
1280 fill_gprs64 (uint64_t *vals
)
1282 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1285 for (regno
= 0; regno
< ppc_num_gprs
; regno
++)
1286 if (register_cached (tdep
->ppc_gp0_regnum
+ regno
))
1287 regcache_raw_collect (current_regcache
, tdep
->ppc_gp0_regnum
+ regno
,
1292 fill_gprs32 (uint32_t *vals
)
1294 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1297 for (regno
= 0; regno
< ppc_num_gprs
; regno
++)
1298 if (register_cached (tdep
->ppc_gp0_regnum
+ regno
))
1299 regcache_raw_collect (current_regcache
, tdep
->ppc_gp0_regnum
+ regno
,
1303 /* Store the floating point registers into a double array. */
1305 fill_fprs (double *vals
)
1307 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1310 /* This function should never be called on architectures without
1311 floating-point registers. */
1312 gdb_assert (ppc_floating_point_unit_p (current_gdbarch
));
1314 for (regno
= tdep
->ppc_fp0_regnum
;
1315 regno
< tdep
->ppc_fp0_regnum
+ ppc_num_fprs
;
1317 if (register_cached (regno
))
1318 regcache_raw_collect (current_regcache
, regno
, vals
+ regno
);
1321 /* Store the special registers into the specified 64-bit and 32-bit
1325 fill_sprs64 (uint64_t *iar
, uint64_t *msr
, uint32_t *cr
,
1326 uint64_t *lr
, uint64_t *ctr
, uint32_t *xer
,
1329 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1331 /* Verify that the size of the size of the IAR buffer is the
1332 same as the raw size of the PC (in the register cache). If
1333 they're not, then either GDB has been built incorrectly, or
1334 there's some other kind of internal error. To be really safe,
1335 we should check all of the sizes. */
1336 gdb_assert (sizeof (*iar
) == register_size (current_gdbarch
, PC_REGNUM
));
1338 if (register_cached (PC_REGNUM
))
1339 regcache_raw_collect (current_regcache
, PC_REGNUM
, iar
);
1340 if (register_cached (tdep
->ppc_ps_regnum
))
1341 regcache_raw_collect (current_regcache
, tdep
->ppc_ps_regnum
, msr
);
1342 if (register_cached (tdep
->ppc_cr_regnum
))
1343 regcache_raw_collect (current_regcache
, tdep
->ppc_cr_regnum
, cr
);
1344 if (register_cached (tdep
->ppc_lr_regnum
))
1345 regcache_raw_collect (current_regcache
, tdep
->ppc_lr_regnum
, lr
);
1346 if (register_cached (tdep
->ppc_ctr_regnum
))
1347 regcache_raw_collect (current_regcache
, tdep
->ppc_ctr_regnum
, ctr
);
1348 if (register_cached (tdep
->ppc_xer_regnum
))
1349 regcache_raw_collect (current_regcache
, tdep
->ppc_xer_regnum
, xer
);
1350 if (tdep
->ppc_fpscr_regnum
>= 0
1351 && register_cached (tdep
->ppc_fpscr_regnum
))
1352 regcache_raw_collect (current_regcache
, tdep
->ppc_fpscr_regnum
, fpscr
);
1356 fill_sprs32 (unsigned long *iar
, unsigned long *msr
, unsigned long *cr
,
1357 unsigned long *lr
, unsigned long *ctr
, unsigned long *xer
,
1358 unsigned long *fpscr
)
1360 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1362 /* Verify that the size of the size of the IAR buffer is the
1363 same as the raw size of the PC (in the register cache). If
1364 they're not, then either GDB has been built incorrectly, or
1365 there's some other kind of internal error. To be really safe,
1366 we should check all of the sizes.
1368 If this assert() fails, the most likely reason is that GDB was
1369 built incorrectly. In order to make use of many of the header
1370 files in /usr/include/sys, GDB needs to be configured so that
1371 sizeof (long) == 4). */
1372 gdb_assert (sizeof (*iar
) == register_size (current_gdbarch
, PC_REGNUM
));
1374 if (register_cached (PC_REGNUM
))
1375 regcache_raw_collect (current_regcache
, PC_REGNUM
, iar
);
1376 if (register_cached (tdep
->ppc_ps_regnum
))
1377 regcache_raw_collect (current_regcache
, tdep
->ppc_ps_regnum
, msr
);
1378 if (register_cached (tdep
->ppc_cr_regnum
))
1379 regcache_raw_collect (current_regcache
, tdep
->ppc_cr_regnum
, cr
);
1380 if (register_cached (tdep
->ppc_lr_regnum
))
1381 regcache_raw_collect (current_regcache
, tdep
->ppc_lr_regnum
, lr
);
1382 if (register_cached (tdep
->ppc_ctr_regnum
))
1383 regcache_raw_collect (current_regcache
, tdep
->ppc_ctr_regnum
, ctr
);
1384 if (register_cached (tdep
->ppc_xer_regnum
))
1385 regcache_raw_collect (current_regcache
, tdep
->ppc_xer_regnum
, xer
);
1386 if (tdep
->ppc_fpscr_regnum
>= 0
1387 && register_cached (tdep
->ppc_fpscr_regnum
))
1388 regcache_raw_collect (current_regcache
, tdep
->ppc_fpscr_regnum
, fpscr
);
1391 /* Store all registers into pthread PDTID, which doesn't have a kernel
1394 It's possible to store a single register into a non-kernel pthread,
1395 but I doubt it's worth the effort. */
1398 store_regs_user_thread (pthdb_pthread_t pdtid
)
1400 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1402 pthdb_context_t ctx
;
1407 if (debug_aix_thread
)
1408 fprintf_unfiltered (gdb_stdlog
,
1409 "store_regs_user_thread %lx\n", (long) pdtid
);
1411 /* Retrieve the thread's current context for its non-register
1413 status
= pthdb_pthread_context (pd_session
, pdtid
, &ctx
);
1414 if (status
!= PTHDB_SUCCESS
)
1415 error ("aix-thread: store_registers: pthdb_pthread_context returned %s",
1416 pd_status2str (status
));
1418 /* Collect general-purpose register values from the regcache. */
1420 for (i
= 0; i
< ppc_num_gprs
; i
++)
1421 if (register_cached (tdep
->ppc_gp0_regnum
+ i
))
1425 regcache_raw_collect (current_regcache
, tdep
->ppc_gp0_regnum
+ i
,
1431 regcache_raw_collect (current_regcache
, tdep
->ppc_gp0_regnum
+ i
,
1437 /* Collect floating-point register values from the regcache. */
1438 if (ppc_floating_point_unit_p (current_gdbarch
))
1439 fill_fprs (ctx
.fpr
);
1441 /* Special registers (always kept in ctx as 64 bits). */
1444 fill_sprs64 (&ctx
.iar
, &ctx
.msr
, &ctx
.cr
, &ctx
.lr
, &ctx
.ctr
, &ctx
.xer
,
1449 /* Problem: ctx.iar etc. are 64 bits, but raw_registers are 32.
1450 Solution: use 32-bit temp variables. (The assert() in fill_sprs32()
1451 will fail if the size of an unsigned long is incorrect. If this
1452 happens, GDB needs to be reconfigured so that longs are 32-bits.) */
1453 unsigned long tmp_iar
, tmp_msr
, tmp_cr
, tmp_lr
, tmp_ctr
, tmp_xer
,
1456 fill_sprs32 (&tmp_iar
, &tmp_msr
, &tmp_cr
, &tmp_lr
, &tmp_ctr
, &tmp_xer
,
1458 if (register_cached (PC_REGNUM
))
1460 if (register_cached (tdep
->ppc_ps_regnum
))
1462 if (register_cached (tdep
->ppc_cr_regnum
))
1464 if (register_cached (tdep
->ppc_lr_regnum
))
1466 if (register_cached (tdep
->ppc_ctr_regnum
))
1468 if (register_cached (tdep
->ppc_xer_regnum
))
1470 if (register_cached (tdep
->ppc_xer_regnum
))
1471 ctx
.fpscr
= tmp_fpscr
;
1474 status
= pthdb_pthread_setcontext (pd_session
, pdtid
, &ctx
);
1475 if (status
!= PTHDB_SUCCESS
)
1476 error ("aix-thread: store_registers: pthdb_pthread_setcontext returned %s",
1477 pd_status2str (status
));
1480 /* Store register REGNO if != -1 or all registers otherwise into
1483 AIX provides a way to set all of a kernel thread's GPRs, FPRs, or
1484 SPRs, but there's no way to set individual registers within those
1485 groups. Therefore, if REGNO != -1, this function stores an entire
1489 store_regs_kernel_thread (int regno
, pthdb_tid_t tid
)
1491 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
1492 uint64_t gprs64
[ppc_num_gprs
];
1493 uint32_t gprs32
[ppc_num_gprs
];
1494 double fprs
[ppc_num_fprs
];
1495 struct ptxsprs sprs64
;
1496 struct ptsprs sprs32
;
1499 if (debug_aix_thread
)
1500 fprintf_unfiltered (gdb_stdlog
,
1501 "store_regs_kernel_thread tid=%lx regno=%d\n",
1504 /* General-purpose registers. */
1506 || (tdep
->ppc_gp0_regnum
<= regno
1507 && regno
< tdep
->ppc_gp0_regnum
+ ppc_num_fprs
))
1511 /* Pre-fetch: some regs may not be in the cache. */
1512 ptrace64aix (PTT_READ_GPRS
, tid
, (unsigned long) gprs64
, 0, NULL
);
1513 fill_gprs64 (gprs64
);
1514 ptrace64aix (PTT_WRITE_GPRS
, tid
, (unsigned long) gprs64
, 0, NULL
);
1518 /* Pre-fetch: some regs may not be in the cache. */
1519 ptrace32 (PTT_READ_GPRS
, tid
, gprs32
, 0, NULL
);
1520 fill_gprs32 (gprs32
);
1521 ptrace32 (PTT_WRITE_GPRS
, tid
, gprs32
, 0, NULL
);
1525 /* Floating-point registers. */
1527 if (ppc_floating_point_unit_p (current_gdbarch
)
1529 || (regno
>= tdep
->ppc_fp0_regnum
1530 && regno
< tdep
->ppc_fp0_regnum
+ ppc_num_fprs
)))
1532 /* Pre-fetch: some regs may not be in the cache. */
1533 ptrace32 (PTT_READ_FPRS
, tid
, (int *) fprs
, 0, NULL
);
1535 ptrace32 (PTT_WRITE_FPRS
, tid
, (int *) fprs
, 0, NULL
);
1538 /* Special-purpose registers. */
1540 if (regno
== -1 || special_register_p (regno
))
1544 /* Pre-fetch: some registers won't be in the cache. */
1545 ptrace64aix (PTT_READ_SPRS
, tid
,
1546 (unsigned long) &sprs64
, 0, NULL
);
1547 fill_sprs64 (&sprs64
.pt_iar
, &sprs64
.pt_msr
, &sprs64
.pt_cr
,
1548 &sprs64
.pt_lr
, &sprs64
.pt_ctr
, &sprs64
.pt_xer
,
1550 ptrace64aix (PTT_WRITE_SPRS
, tid
,
1551 (unsigned long) &sprs64
, 0, NULL
);
1555 /* Pre-fetch: some registers won't be in the cache. */
1556 ptrace32 (PTT_READ_SPRS
, tid
, (int *) &sprs32
, 0, NULL
);
1558 fill_sprs32 (&sprs32
.pt_iar
, &sprs32
.pt_msr
, &sprs32
.pt_cr
,
1559 &sprs32
.pt_lr
, &sprs32
.pt_ctr
, &sprs32
.pt_xer
,
1562 if (tdep
->ppc_mq_regnum
>= 0)
1563 if (register_cached (tdep
->ppc_mq_regnum
))
1564 regcache_raw_collect (current_regcache
, tdep
->ppc_mq_regnum
,
1567 ptrace32 (PTT_WRITE_SPRS
, tid
, (int *) &sprs32
, 0, NULL
);
1572 /* Store gdb's current view of the register set into the
1573 thread/process specified by inferior_ptid. */
1576 aix_thread_store_registers (int regno
)
1578 struct thread_info
*thread
;
1581 if (!PD_TID (inferior_ptid
))
1582 base_target
.to_store_registers (regno
);
1585 thread
= find_thread_pid (inferior_ptid
);
1586 tid
= thread
->private->tid
;
1588 if (tid
== PTHDB_INVALID_TID
)
1589 store_regs_user_thread (thread
->private->pdtid
);
1591 store_regs_kernel_thread (regno
, tid
);
1595 /* Transfer LEN bytes of memory from GDB address MYADDR to target
1596 address MEMADDR if WRITE and vice versa otherwise. */
1599 aix_thread_xfer_memory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
1600 struct mem_attrib
*attrib
,
1601 struct target_ops
*target
)
1604 struct cleanup
*cleanup
= save_inferior_ptid ();
1606 inferior_ptid
= pid_to_ptid (PIDGET (inferior_ptid
));
1607 n
= base_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
,
1608 write
, attrib
, &base_target
);
1609 do_cleanups (cleanup
);
1614 /* Kill and forget about the inferior process. */
1617 aix_thread_kill (void)
1619 struct cleanup
*cleanup
= save_inferior_ptid ();
1621 inferior_ptid
= pid_to_ptid (PIDGET (inferior_ptid
));
1622 base_target
.to_kill ();
1623 do_cleanups (cleanup
);
1626 /* Clean up after the inferior exits. */
1629 aix_thread_mourn_inferior (void)
1632 base_target
.to_mourn_inferior ();
1635 /* Return whether thread PID is still valid. */
1638 aix_thread_thread_alive (ptid_t ptid
)
1641 return base_target
.to_thread_alive (ptid
);
1643 /* We update the thread list every time the child stops, so all
1644 valid threads should be in the thread list. */
1645 return in_thread_list (ptid
);
1648 /* Return a printable representation of composite PID for use in
1649 "info threads" output. */
1652 aix_thread_pid_to_str (ptid_t ptid
)
1654 static char *ret
= NULL
;
1657 return base_target
.to_pid_to_str (ptid
);
1659 /* Free previous return value; a new one will be allocated by
1663 ret
= xstrprintf ("Thread %ld", ptid_get_tid (ptid
));
1667 /* Return a printable representation of extra information about
1668 THREAD, for use in "info threads" output. */
1671 aix_thread_extra_thread_info (struct thread_info
*thread
)
1673 struct ui_file
*buf
;
1675 pthdb_pthread_t pdtid
;
1677 pthdb_state_t state
;
1678 pthdb_suspendstate_t suspendstate
;
1679 pthdb_detachstate_t detachstate
;
1682 static char *ret
= NULL
;
1684 if (!PD_TID (thread
->ptid
))
1687 buf
= mem_fileopen ();
1689 pdtid
= thread
->private->pdtid
;
1690 tid
= thread
->private->tid
;
1692 if (tid
!= PTHDB_INVALID_TID
)
1693 fprintf_unfiltered (buf
, "tid %d", tid
);
1695 status
= pthdb_pthread_state (pd_session
, pdtid
, &state
);
1696 if (status
!= PTHDB_SUCCESS
)
1698 fprintf_unfiltered (buf
, ", %s", state2str (state
));
1700 status
= pthdb_pthread_suspendstate (pd_session
, pdtid
,
1702 if (status
== PTHDB_SUCCESS
&& suspendstate
== PSS_SUSPENDED
)
1703 fprintf_unfiltered (buf
, ", suspended");
1705 status
= pthdb_pthread_detachstate (pd_session
, pdtid
,
1707 if (status
== PTHDB_SUCCESS
&& detachstate
== PDS_DETACHED
)
1708 fprintf_unfiltered (buf
, ", detached");
1710 pthdb_pthread_cancelpend (pd_session
, pdtid
, &cancelpend
);
1711 if (status
== PTHDB_SUCCESS
&& cancelpend
)
1712 fprintf_unfiltered (buf
, ", cancel pending");
1714 ui_file_write (buf
, "", 1);
1716 xfree (ret
); /* Free old buffer. */
1718 ret
= ui_file_xstrdup (buf
, &length
);
1719 ui_file_delete (buf
);
1724 /* Initialize target aix_thread_ops. */
1727 init_aix_thread_ops (void)
1729 aix_thread_ops
.to_shortname
= "aix-threads";
1730 aix_thread_ops
.to_longname
= "AIX pthread support";
1731 aix_thread_ops
.to_doc
= "AIX pthread support";
1733 aix_thread_ops
.to_attach
= aix_thread_attach
;
1734 aix_thread_ops
.to_detach
= aix_thread_detach
;
1735 aix_thread_ops
.to_resume
= aix_thread_resume
;
1736 aix_thread_ops
.to_wait
= aix_thread_wait
;
1737 aix_thread_ops
.to_fetch_registers
= aix_thread_fetch_registers
;
1738 aix_thread_ops
.to_store_registers
= aix_thread_store_registers
;
1739 aix_thread_ops
.deprecated_xfer_memory
= aix_thread_xfer_memory
;
1740 /* No need for aix_thread_ops.to_create_inferior, because we activate thread
1741 debugging when the inferior reaches pd_brk_addr. */
1742 aix_thread_ops
.to_kill
= aix_thread_kill
;
1743 aix_thread_ops
.to_mourn_inferior
= aix_thread_mourn_inferior
;
1744 aix_thread_ops
.to_thread_alive
= aix_thread_thread_alive
;
1745 aix_thread_ops
.to_pid_to_str
= aix_thread_pid_to_str
;
1746 aix_thread_ops
.to_extra_thread_info
= aix_thread_extra_thread_info
;
1747 aix_thread_ops
.to_stratum
= thread_stratum
;
1748 aix_thread_ops
.to_magic
= OPS_MAGIC
;
1751 /* Module startup initialization function, automagically called by
1755 _initialize_aix_thread (void)
1757 init_aix_thread_ops ();
1758 add_target (&aix_thread_ops
);
1760 /* Notice when object files get loaded and unloaded. */
1761 target_new_objfile_chain
= deprecated_target_new_objfile_hook
;
1762 deprecated_target_new_objfile_hook
= new_objfile
;
1764 deprecated_add_show_from_set
1765 (add_set_cmd ("aix-thread", no_class
, var_zinteger
,
1766 (char *) &debug_aix_thread
,
1767 "Set debugging of AIX thread module.\n"
1768 "Enables printf debugging output.\n",