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Diffstat (limited to 'gdb/aix-thread.c')
| -rw-r--r-- | gdb/aix-thread.c | 1707 |
1 files changed, 0 insertions, 1707 deletions
diff --git a/gdb/aix-thread.c b/gdb/aix-thread.c deleted file mode 100644 index da75f21..0000000 --- a/gdb/aix-thread.c +++ /dev/null @@ -1,1707 +0,0 @@ -/* Low level interface for debugging AIX 4.3+ pthreads. - - Copyright 1999, 2000, 2002 Free Software Foundation, Inc. - Written by Nick Duffek <nsd@redhat.com>. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - - -/* This module uses the libpthdebug.a library provided by AIX 4.3+ for - debugging pthread applications. - - Some name prefix conventions: - pthdb_ provided by libpthdebug.a - pdc_ callbacks that this module provides to libpthdebug.a - pd_ variables or functions interfacing with libpthdebug.a - - libpthdebug peculiarities: - - - pthdb_ptid_pthread() is prototyped in <sys/pthdebug.h>, but - it's not documented, and after several calls it stops working - and causes other libpthdebug functions to fail. - - - pthdb_tid_pthread() doesn't always work after - pthdb_session_update(), but it does work after cycling through - all threads using pthdb_pthread(). - - */ - -#include "defs.h" -#include "gdb_assert.h" -#include "gdbthread.h" -#include "target.h" -#include "inferior.h" -#include "regcache.h" -#include "gdbcmd.h" -#include "language.h" /* for local_hex_string() */ -#include "ppc-tdep.h" - -#include <procinfo.h> -#include <sys/types.h> -#include <sys/ptrace.h> -#include <sys/reg.h> -#include <sched.h> -#include <sys/pthdebug.h> - -/* Whether to emit debugging output. */ -static int debug_aix_thread; - -/* In AIX 5.1, functions use pthdb_tid_t instead of tid_t. */ -#ifndef PTHDB_VERSION_3 -#define pthdb_tid_t tid_t -#endif - -/* Return whether to treat PID as a debuggable thread id. */ - -#define PD_TID(ptid) (pd_active && ptid_get_tid (ptid) != 0) - -/* Build a thread ptid. */ -#define BUILD_THREAD(TID, PID) ptid_build (PID, 0, TID) - -/* Build and lwp ptid. */ -#define BUILD_LWP(LWP, PID) MERGEPID (PID, LWP) - -/* pthdb_user_t value that we pass to pthdb functions. 0 causes - PTHDB_BAD_USER errors, so use 1. */ - -#define PD_USER 1 - -/* Success and failure values returned by pthdb callbacks. */ - -#define PDC_SUCCESS PTHDB_SUCCESS -#define PDC_FAILURE PTHDB_CALLBACK - -/* Private data attached to each element in GDB's thread list. */ - -struct private_thread_info { - pthdb_pthread_t pdtid; /* thread's libpthdebug id */ - pthdb_tid_t tid; /* kernel thread id */ -}; - -/* Information about a thread of which libpthdebug is aware. */ - -struct pd_thread { - pthdb_pthread_t pdtid; - pthread_t pthid; - pthdb_tid_t tid; -}; - -/* This module's target-specific operations, active while pd_able is true. */ - -static struct target_ops aix_thread_ops; - -/* Copy of the target over which ops is pushed. - This is more convenient than a pointer to child_ops or core_ops, - because they lack current_target's default callbacks. */ - -static struct target_ops base_target; - -/* Address of the function that libpthread will call when libpthdebug - is ready to be initialized. */ - -static CORE_ADDR pd_brk_addr; - -/* Whether the current application is debuggable by pthdb. */ - -static int pd_able = 0; - -/* Whether a threaded application is being debugged. */ - -static int pd_active = 0; - -/* Whether the current architecture is 64-bit. - Only valid when pd_able is true. */ - -static int arch64; - -/* Saved pointer to previous owner of target_new_objfile_hook. */ - -static void (*target_new_objfile_chain)(struct objfile *); - -/* Forward declarations for pthdb callbacks. */ - -static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int); -static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t); -static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t); -static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid, - unsigned long long flags, - pthdb_context_t *context); -static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid, - unsigned long long flags, - pthdb_context_t *context); -static int pdc_alloc (pthdb_user_t, size_t, void **); -static int pdc_realloc (pthdb_user_t, void *, size_t, void **); -static int pdc_dealloc (pthdb_user_t, void *); - -/* pthdb callbacks. */ - -static pthdb_callbacks_t pd_callbacks = { - pdc_symbol_addrs, - pdc_read_data, - pdc_write_data, - pdc_read_regs, - pdc_write_regs, - pdc_alloc, - pdc_realloc, - pdc_dealloc, - NULL -}; - -/* Current pthdb session. */ - -static pthdb_session_t pd_session; - -/* Return a printable representation of pthdebug function return - STATUS. */ - -static char * -pd_status2str (int status) -{ - switch (status) - { - case PTHDB_SUCCESS: return "SUCCESS"; - case PTHDB_NOSYS: return "NOSYS"; - case PTHDB_NOTSUP: return "NOTSUP"; - case PTHDB_BAD_VERSION: return "BAD_VERSION"; - case PTHDB_BAD_USER: return "BAD_USER"; - case PTHDB_BAD_SESSION: return "BAD_SESSION"; - case PTHDB_BAD_MODE: return "BAD_MODE"; - case PTHDB_BAD_FLAGS: return "BAD_FLAGS"; - case PTHDB_BAD_CALLBACK: return "BAD_CALLBACK"; - case PTHDB_BAD_POINTER: return "BAD_POINTER"; - case PTHDB_BAD_CMD: return "BAD_CMD"; - case PTHDB_BAD_PTHREAD: return "BAD_PTHREAD"; - case PTHDB_BAD_ATTR: return "BAD_ATTR"; - case PTHDB_BAD_MUTEX: return "BAD_MUTEX"; - case PTHDB_BAD_MUTEXATTR: return "BAD_MUTEXATTR"; - case PTHDB_BAD_COND: return "BAD_COND"; - case PTHDB_BAD_CONDATTR: return "BAD_CONDATTR"; - case PTHDB_BAD_RWLOCK: return "BAD_RWLOCK"; - case PTHDB_BAD_RWLOCKATTR: return "BAD_RWLOCKATTR"; - case PTHDB_BAD_KEY: return "BAD_KEY"; - case PTHDB_BAD_PTID: return "BAD_PTID"; - case PTHDB_BAD_TID: return "BAD_TID"; - case PTHDB_CALLBACK: return "CALLBACK"; - case PTHDB_CONTEXT: return "CONTEXT"; - case PTHDB_HELD: return "HELD"; - case PTHDB_NOT_HELD: return "NOT_HELD"; - case PTHDB_MEMORY: return "MEMORY"; - case PTHDB_NOT_PTHREADED: return "NOT_PTHREADED"; - case PTHDB_SYMBOL: return "SYMBOL"; - case PTHDB_NOT_AVAIL: return "NOT_AVAIL"; - case PTHDB_INTERNAL: return "INTERNAL"; - default: return "UNKNOWN"; - } -} - -/* A call to ptrace(REQ, ID, ...) just returned RET. Check for - exceptional conditions and either return nonlocally or else return - 1 for success and 0 for failure. */ - -static int -ptrace_check (int req, int id, int ret) -{ - if (ret == 0 && !errno) - return 1; - - /* According to ptrace(2), ptrace may fail with EPERM if "the - Identifier parameter corresponds to a kernel thread which is - stopped in kernel mode and whose computational state cannot be - read or written." This happens quite often with register reads. */ - - switch (req) - { - case PTT_READ_GPRS: - case PTT_READ_FPRS: - case PTT_READ_SPRS: - if (ret == -1 && errno == EPERM) - { - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "ptrace (%d, %d) = %d (errno = %d)\n", - req, id, ret, errno); - return ret == -1 ? 0 : 1; - } - break; - } - error ("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)", - req, id, ret, errno, safe_strerror (errno)); - return 0; /* Not reached. */ -} - -/* Call ptracex (REQ, ID, ADDR, DATA, BUF). Return success. */ - -static int -ptrace64aix (int req, int id, long long addr, int data, int *buf) -{ - errno = 0; - return ptrace_check (req, id, ptracex (req, id, addr, data, buf)); -} - -/* Call ptrace (REQ, ID, ADDR, DATA, BUF). Return success. */ - -static int -ptrace32 (int req, int id, int *addr, int data, int *buf) -{ - errno = 0; - return ptrace_check (req, id, - ptrace (req, id, (int *) addr, data, buf)); -} - -/* If *PIDP is a composite process/thread id, convert it to a - process id. */ - -static void -pid_to_prc (ptid_t *ptidp) -{ - ptid_t ptid; - - ptid = *ptidp; - if (PD_TID (ptid)) - *ptidp = pid_to_ptid (PIDGET (ptid)); -} - -/* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to - the address of SYMBOLS[<i>].name. */ - -static int -pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count) -{ - struct minimal_symbol *ms; - int i; - char *name; - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)\n", - user, (long) symbols, count); - - for (i = 0; i < count; i++) - { - name = symbols[i].name; - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - " symbols[%d].name = \"%s\"\n", i, name); - - if (!*name) - symbols[i].addr = 0; - else - { - if (!(ms = lookup_minimal_symbol (name, NULL, NULL))) - { - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, " returning PDC_FAILURE\n"); - return PDC_FAILURE; - } - symbols[i].addr = SYMBOL_VALUE_ADDRESS (ms); - } - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, " symbols[%d].addr = %s\n", - i, local_hex_string (symbols[i].addr)); - } - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, " returning PDC_SUCCESS\n"); - return PDC_SUCCESS; -} - -/* Read registers call back function should be able to read the - context information of a debuggee kernel thread from an active - process or from a core file. The information should be formatted - in context64 form for both 32-bit and 64-bit process. - If successful return 0, else non-zero is returned. */ - -static int -pdc_read_regs (pthdb_user_t user, - pthdb_tid_t tid, - unsigned long long flags, - pthdb_context_t *context) -{ - /* This function doesn't appear to be used, so we could probably - just return 0 here. HOWEVER, if it is not defined, the OS will - complain and several thread debug functions will fail. In case - this is needed, I have implemented what I think it should do, - however this code is untested. */ - - uint64_t gprs64[32]; - uint32_t gprs32[32]; - double fprs[32]; - struct ptxsprs sprs64; - struct ptsprs sprs32; - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n", - (int) tid, local_hex_string (flags)); - - /* General-purpose registers. */ - if (flags & PTHDB_FLAG_GPRS) - { - if (arch64) - { - if (!ptrace64aix (PTT_READ_GPRS, tid, - (unsigned long) gprs64, 0, NULL)) - memset (gprs64, 0, sizeof (gprs64)); - memcpy (context->gpr, gprs64, sizeof(gprs64)); - } - else - { - if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL)) - memset (gprs32, 0, sizeof (gprs32)); - memcpy (context->gpr, gprs32, sizeof(gprs32)); - } - } - - /* Floating-point registers. */ - if (flags & PTHDB_FLAG_FPRS) - { - if (!ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL)) - memset (fprs, 0, sizeof (fprs)); - memcpy (context->fpr, fprs, sizeof(fprs)); - } - - /* Special-purpose registers. */ - if (flags & PTHDB_FLAG_SPRS) - { - if (arch64) - { - if (!ptrace64aix (PTT_READ_SPRS, tid, - (unsigned long) &sprs64, 0, NULL)) - memset (&sprs64, 0, sizeof (sprs64)); - memcpy (&context->msr, &sprs64, sizeof(sprs64)); - } - else - { - if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL)) - memset (&sprs32, 0, sizeof (sprs32)); - memcpy (&context->msr, &sprs32, sizeof(sprs32)); - } - } - return 0; -} - -/* Write register function should be able to write requested context - information to specified debuggee's kernel thread id. - If successful return 0, else non-zero is returned. */ - -static int -pdc_write_regs (pthdb_user_t user, - pthdb_tid_t tid, - unsigned long long flags, - pthdb_context_t *context) -{ - /* This function doesn't appear to be used, so we could probably - just return 0 here. HOWEVER, if it is not defined, the OS will - complain and several thread debug functions will fail. In case - this is needed, I have implemented what I think it should do, - however this code is untested. */ - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, "pdc_write_regs tid=%d flags=%s\n", - (int) tid, local_hex_string (flags)); - - /* General-purpose registers. */ - if (flags & PTHDB_FLAG_GPRS) - { - if (arch64) - ptrace64aix (PTT_WRITE_GPRS, tid, - (unsigned long) context->gpr, 0, NULL); - else - ptrace32 (PTT_WRITE_GPRS, tid, (int *) context->gpr, 0, NULL); - } - - /* Floating-point registers. */ - if (flags & PTHDB_FLAG_FPRS) - { - ptrace32 (PTT_WRITE_FPRS, tid, (int *) context->fpr, 0, NULL); - } - - /* Special-purpose registers. */ - if (flags & PTHDB_FLAG_SPRS) - { - if (arch64) - { - ptrace64aix (PTT_WRITE_SPRS, tid, - (unsigned long) &context->msr, 0, NULL); - } - else - { - ptrace32 (PTT_WRITE_SPRS, tid, (int *) &context->msr, 0, NULL); - } - } - return 0; -} - -/* pthdb callback: read LEN bytes from process ADDR into BUF. */ - -static int -pdc_read_data (pthdb_user_t user, void *buf, - pthdb_addr_t addr, size_t len) -{ - int status, ret; - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", - user, (long) buf, local_hex_string (addr), len); - - status = target_read_memory (addr, buf, len); - ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", - status, pd_status2str (ret)); - return ret; -} - -/* pthdb callback: write LEN bytes from BUF to process ADDR. */ - -static int -pdc_write_data (pthdb_user_t user, void *buf, - pthdb_addr_t addr, size_t len) -{ - int status, ret; - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", - user, (long) buf, local_hex_string (addr), len); - - status = target_write_memory (addr, buf, len); - ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", status, - pd_status2str (ret)); - return ret; -} - -/* pthdb callback: allocate a LEN-byte buffer and store a pointer to it - in BUFP. */ - -static int -pdc_alloc (pthdb_user_t user, size_t len, void **bufp) -{ - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n", - user, len, (long) bufp); - *bufp = xmalloc (len); - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - " malloc returned 0x%lx\n", (long) *bufp); - - /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never - be returned. */ - - return *bufp ? PDC_SUCCESS : PDC_FAILURE; -} - -/* pthdb callback: reallocate BUF, which was allocated by the alloc or - realloc callback, so that it contains LEN bytes, and store a - pointer to the result in BUFP. */ - -static int -pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp) -{ - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n", - user, (long) buf, len, (long) bufp); - *bufp = xrealloc (buf, len); - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - " realloc returned 0x%lx\n", (long) *bufp); - return *bufp ? PDC_SUCCESS : PDC_FAILURE; -} - -/* pthdb callback: free BUF, which was allocated by the alloc or - realloc callback. */ - -static int -pdc_dealloc (pthdb_user_t user, void *buf) -{ - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "pdc_free (user = %ld, buf = 0x%lx)\n", user, - (long) buf); - xfree (buf); - return PDC_SUCCESS; -} - -/* Return a printable representation of pthread STATE. */ - -static char * -state2str (pthdb_state_t state) -{ - switch (state) - { - case PST_IDLE: return "idle"; /* being created */ - case PST_RUN: return "running"; /* running */ - case PST_SLEEP: return "sleeping"; /* awaiting an event */ - case PST_READY: return "ready"; /* runnable */ - case PST_TERM: return "finished"; /* awaiting a join/detach */ - default: return "unknown"; - } -} - -/* qsort() comparison function for sorting pd_thread structs by pthid. */ - -static int -pcmp (const void *p1v, const void *p2v) -{ - struct pd_thread *p1 = (struct pd_thread *) p1v; - struct pd_thread *p2 = (struct pd_thread *) p2v; - return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid; -} - -/* iterate_over_threads() callback for counting GDB threads. */ - -static int -giter_count (struct thread_info *thread, void *countp) -{ - (*(int *) countp)++; - return 0; -} - -/* iterate_over_threads() callback for accumulating GDB thread pids. */ - -static int -giter_accum (struct thread_info *thread, void *bufp) -{ - **(struct thread_info ***) bufp = thread; - (*(struct thread_info ***) bufp)++; - return 0; -} - -/* ptid comparison function */ - -static int -ptid_cmp (ptid_t ptid1, ptid_t ptid2) -{ - int pid1, pid2; - - if (ptid_get_pid (ptid1) < ptid_get_pid (ptid2)) - return -1; - else if (ptid_get_pid (ptid1) > ptid_get_pid (ptid2)) - return 1; - else if (ptid_get_tid (ptid1) < ptid_get_tid (ptid2)) - return -1; - else if (ptid_get_tid (ptid1) > ptid_get_tid (ptid2)) - return 1; - else if (ptid_get_lwp (ptid1) < ptid_get_lwp (ptid2)) - return -1; - else if (ptid_get_lwp (ptid1) > ptid_get_lwp (ptid2)) - return 1; - else - return 0; -} - -/* qsort() comparison function for sorting thread_info structs by pid. */ - -static int -gcmp (const void *t1v, const void *t2v) -{ - struct thread_info *t1 = *(struct thread_info **) t1v; - struct thread_info *t2 = *(struct thread_info **) t2v; - return ptid_cmp (t1->ptid, t2->ptid); -} - -/* Synchronize GDB's thread list with libpthdebug's. - - There are some benefits of doing this every time the inferior stops: - - - allows users to run thread-specific commands without needing to - run "info threads" first - - - helps pthdb_tid_pthread() work properly (see "libpthdebug - peculiarities" at the top of this module) - - - simplifies the demands placed on libpthdebug, which seems to - have difficulty with certain call patterns */ - -static void -sync_threadlists (void) -{ - int cmd, status, infpid; - int pcount, psize, pi, gcount, gi; - struct pd_thread *pbuf; - struct thread_info **gbuf, **g, *thread; - pthdb_pthread_t pdtid; - pthread_t pthid; - pthdb_tid_t tid; - - /* Accumulate an array of libpthdebug threads sorted by pthread id. */ - - pcount = 0; - psize = 1; - pbuf = (struct pd_thread *) xmalloc (psize * sizeof *pbuf); - - for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT) - { - status = pthdb_pthread (pd_session, &pdtid, cmd); - if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD) - break; - - status = pthdb_pthread_ptid (pd_session, pdtid, &pthid); - if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID) - continue; - - if (pcount == psize) - { - psize *= 2; - pbuf = (struct pd_thread *) xrealloc (pbuf, - psize * sizeof *pbuf); - } - pbuf[pcount].pdtid = pdtid; - pbuf[pcount].pthid = pthid; - pcount++; - } - - for (pi = 0; pi < pcount; pi++) - { - status = pthdb_pthread_tid (pd_session, pbuf[pi].pdtid, &tid); - if (status != PTHDB_SUCCESS) - tid = PTHDB_INVALID_TID; - pbuf[pi].tid = tid; - } - - qsort (pbuf, pcount, sizeof *pbuf, pcmp); - - /* Accumulate an array of GDB threads sorted by pid. */ - - gcount = 0; - iterate_over_threads (giter_count, &gcount); - g = gbuf = (struct thread_info **) xmalloc (gcount * sizeof *gbuf); - iterate_over_threads (giter_accum, &g); - qsort (gbuf, gcount, sizeof *gbuf, gcmp); - - /* Apply differences between the two arrays to GDB's thread list. */ - - infpid = PIDGET (inferior_ptid); - for (pi = gi = 0; pi < pcount || gi < gcount;) - { - if (pi == pcount) - { - delete_thread (gbuf[gi]->ptid); - gi++; - } - else if (gi == gcount) - { - thread = add_thread (BUILD_THREAD (pbuf[pi].pthid, infpid)); - thread->private = xmalloc (sizeof (struct private_thread_info)); - thread->private->pdtid = pbuf[pi].pdtid; - thread->private->tid = pbuf[pi].tid; - pi++; - } - else - { - ptid_t pptid, gptid; - int cmp_result; - - pptid = BUILD_THREAD (pbuf[pi].pthid, infpid); - gptid = gbuf[gi]->ptid; - pdtid = pbuf[pi].pdtid; - tid = pbuf[pi].tid; - - cmp_result = ptid_cmp (pptid, gptid); - - if (cmp_result == 0) - { - gbuf[gi]->private->pdtid = pdtid; - gbuf[gi]->private->tid = tid; - pi++; - gi++; - } - else if (cmp_result > 0) - { - delete_thread (gptid); - gi++; - } - else - { - thread = add_thread (pptid); - thread->private = xmalloc (sizeof (struct private_thread_info)); - thread->private->pdtid = pdtid; - thread->private->tid = tid; - pi++; - } - } - } - - xfree (pbuf); - xfree (gbuf); -} - -/* Iterate_over_threads() callback for locating a thread whose kernel - thread just received a trap signal. */ - -static int -iter_trap (struct thread_info *thread, void *unused) -{ - struct thrdsinfo64 thrinf; - pthdb_tid_t tid; - - /* getthrds(3) isn't prototyped in any AIX 4.3.3 #include file. */ - extern int getthrds (pid_t, struct thrdsinfo64 *, - int, pthdb_tid_t *, int); - - tid = thread->private->tid; - if (tid == PTHDB_INVALID_TID) - return 0; - - if (getthrds (PIDGET (inferior_ptid), &thrinf, - sizeof (thrinf), &tid, 1) != 1) - return 0; - - return thrinf.ti_cursig == SIGTRAP; -} - -/* Synchronize libpthdebug's state with the inferior and with GDB, - generate a composite process/thread <pid> for the current thread, - set inferior_ptid to <pid> if SET_INFPID, and return <pid>. */ - -static ptid_t -pd_update (int set_infpid) -{ - int status; - ptid_t ptid; - struct thread_info *thread; - - if (!pd_active) - return inferior_ptid; - - status = pthdb_session_update (pd_session); - if (status != PTHDB_SUCCESS) - return inferior_ptid; - - sync_threadlists (); - - /* Define "current thread" as one that just received a trap signal. */ - - thread = iterate_over_threads (iter_trap, NULL); - if (!thread) - ptid = inferior_ptid; - else - { - ptid = thread->ptid; - if (set_infpid) - inferior_ptid = ptid; - } - return ptid; -} - -/* Try to start debugging threads in the current process. - If successful and SET_INFPID, set inferior_ptid to reflect the - current thread. */ - -static ptid_t -pd_activate (int set_infpid) -{ - int status; - - status = pthdb_session_init (PD_USER, arch64 ? PEM_64BIT : PEM_32BIT, - PTHDB_FLAG_REGS, &pd_callbacks, - &pd_session); - if (status != PTHDB_SUCCESS) - { - return inferior_ptid; - } - pd_active = 1; - return pd_update (set_infpid); -} - -/* Undo the effects of pd_activate(). */ - -static void -pd_deactivate (void) -{ - if (!pd_active) - return; - pthdb_session_destroy (pd_session); - - pid_to_prc (&inferior_ptid); - pd_active = 0; -} - -/* An object file has just been loaded. Check whether the current - application is pthreaded, and if so, prepare for thread debugging. */ - -static void -pd_enable (void) -{ - int status; - char *stub_name; - struct minimal_symbol *ms; - - /* Don't initialize twice. */ - if (pd_able) - return; - - /* Check application word size. */ - arch64 = REGISTER_RAW_SIZE (0) == 8; - - /* Check whether the application is pthreaded. */ - stub_name = NULL; - status = pthdb_session_pthreaded (PD_USER, PTHDB_FLAG_REGS, - &pd_callbacks, &stub_name); - if ((status != PTHDB_SUCCESS && - status != PTHDB_NOT_PTHREADED) || !stub_name) - return; - - /* Set a breakpoint on the returned stub function. */ - if (!(ms = lookup_minimal_symbol (stub_name, NULL, NULL))) - return; - pd_brk_addr = SYMBOL_VALUE_ADDRESS (ms); - if (!create_thread_event_breakpoint (pd_brk_addr)) - return; - - /* Prepare for thread debugging. */ - base_target = current_target; - push_target (&aix_thread_ops); - pd_able = 1; - - /* If we're debugging a core file or an attached inferior, the - pthread library may already have been initialized, so try to - activate thread debugging. */ - pd_activate (1); -} - -/* Undo the effects of pd_enable(). */ - -static void -pd_disable (void) -{ - if (!pd_able) - return; - if (pd_active) - pd_deactivate (); - pd_able = 0; - unpush_target (&aix_thread_ops); -} - -/* target_new_objfile_hook callback. - - If OBJFILE is non-null, check whether a threaded application is - being debugged, and if so, prepare for thread debugging. - - If OBJFILE is null, stop debugging threads. */ - -static void -new_objfile (struct objfile *objfile) -{ - if (objfile) - pd_enable (); - else - pd_disable (); - - if (target_new_objfile_chain) - target_new_objfile_chain (objfile); -} - -/* Attach to process specified by ARGS. */ - -static void -aix_thread_attach (char *args, int from_tty) -{ - base_target.to_attach (args, from_tty); - pd_activate (1); -} - -/* Detach from the process attached to by aix_thread_attach(). */ - -static void -aix_thread_detach (char *args, int from_tty) -{ - pd_disable (); - base_target.to_detach (args, from_tty); -} - -/* Tell the inferior process to continue running thread PID if != -1 - and all threads otherwise. */ - -static void -aix_thread_resume (ptid_t ptid, int step, enum target_signal sig) -{ - struct thread_info *thread; - pthdb_tid_t tid[2]; - - if (!PD_TID (ptid)) - { - struct cleanup *cleanup = save_inferior_ptid (); - inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); - base_target.to_resume (ptid, step, sig); - do_cleanups (cleanup); - } - else - { - thread = find_thread_pid (ptid); - if (!thread) - error ("aix-thread resume: unknown pthread %ld", - TIDGET (ptid)); - - tid[0] = thread->private->tid; - if (tid[0] == PTHDB_INVALID_TID) - error ("aix-thread resume: no tid for pthread %ld", - TIDGET (ptid)); - tid[1] = 0; - - if (arch64) - ptrace64aix (PTT_CONTINUE, tid[0], 1, - target_signal_to_host (sig), (int *) tid); - else - ptrace32 (PTT_CONTINUE, tid[0], (int *) 1, - target_signal_to_host (sig), (int *) tid); - } -} - -/* Wait for thread/process ID if != -1 or for any thread otherwise. - If an error occurs, return -1, else return the pid of the stopped - thread. */ - -static ptid_t -aix_thread_wait (ptid_t ptid, struct target_waitstatus *status) -{ - struct cleanup *cleanup = save_inferior_ptid (); - - pid_to_prc (&ptid); - - inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); - ptid = base_target.to_wait (ptid, status); - do_cleanups (cleanup); - - if (PIDGET (ptid) == -1) - return pid_to_ptid (-1); - - /* Check whether libpthdebug might be ready to be initialized. */ - if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED && - status->value.sig == TARGET_SIGNAL_TRAP && - read_pc_pid (ptid) - DECR_PC_AFTER_BREAK == pd_brk_addr) - return pd_activate (0); - - return pd_update (0); -} - -/* Record that the 64-bit general-purpose registers contain VALS. */ - -static void -supply_gprs64 (uint64_t *vals) -{ - int regno; - - for (regno = 0; regno < 32; regno++) - supply_register (regno, (char *) (vals + regno)); -} - -/* Record that 32-bit register REGNO contains VAL. */ - -static void -supply_reg32 (int regno, uint32_t val) -{ - supply_register (regno, (char *) &val); -} - -/* Record that the floating-point registers contain VALS. */ - -static void -supply_fprs (double *vals) -{ - int regno; - - for (regno = 0; regno < 32; regno++) - supply_register (regno + FP0_REGNUM, (char *) (vals + regno)); -} - -/* Predicate to test whether given register number is a "special" register. */ -static int -special_register_p (int regno) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - return regno == PC_REGNUM - || regno == tdep->ppc_ps_regnum - || regno == tdep->ppc_cr_regnum - || regno == tdep->ppc_lr_regnum - || regno == tdep->ppc_ctr_regnum - || regno == tdep->ppc_xer_regnum - || regno == tdep->ppc_fpscr_regnum - || (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum); -} - - -/* Record that the special registers contain the specified 64-bit and - 32-bit values. */ - -static void -supply_sprs64 (uint64_t iar, uint64_t msr, uint32_t cr, - uint64_t lr, uint64_t ctr, uint32_t xer, - uint32_t fpscr) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - supply_register (PC_REGNUM, (char *) &iar); - supply_register (tdep->ppc_ps_regnum, (char *) &msr); - supply_register (tdep->ppc_cr_regnum, (char *) &cr); - supply_register (tdep->ppc_lr_regnum, (char *) &lr); - supply_register (tdep->ppc_ctr_regnum, (char *) &ctr); - supply_register (tdep->ppc_xer_regnum, (char *) &xer); - supply_register (tdep->ppc_fpscr_regnum, (char *) &fpscr); -} - -/* Record that the special registers contain the specified 32-bit - values. */ - -static void -supply_sprs32 (uint32_t iar, uint32_t msr, uint32_t cr, - uint32_t lr, uint32_t ctr, uint32_t xer, - uint32_t fpscr) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - supply_register (PC_REGNUM, (char *) &iar); - supply_register (tdep->ppc_ps_regnum, (char *) &msr); - supply_register (tdep->ppc_cr_regnum, (char *) &cr); - supply_register (tdep->ppc_lr_regnum, (char *) &lr); - supply_register (tdep->ppc_ctr_regnum, (char *) &ctr); - supply_register (tdep->ppc_xer_regnum, (char *) &xer); - supply_register (tdep->ppc_fpscr_regnum, (char *) &fpscr); -} - -/* Fetch all registers from pthread PDTID, which doesn't have a kernel - thread. - - There's no way to query a single register from a non-kernel - pthread, so there's no need for a single-register version of this - function. */ - -static void -fetch_regs_user_thread (pthdb_pthread_t pdtid) -{ - int status, i; - pthdb_context_t ctx; - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "fetch_regs_user_thread %lx\n", (long) pdtid); - status = pthdb_pthread_context (pd_session, pdtid, &ctx); - if (status != PTHDB_SUCCESS) - error ("aix-thread: fetch_registers: pthdb_pthread_context returned %s", - pd_status2str (status)); - - /* General-purpose registers. */ - - if (arch64) - supply_gprs64 (ctx.gpr); - else - for (i = 0; i < 32; i++) - supply_reg32 (i, ctx.gpr[i]); - - /* Floating-point registers. */ - - supply_fprs (ctx.fpr); - - /* Special registers. */ - - if (arch64) - supply_sprs64 (ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, ctx.xer, - ctx.fpscr); - else - supply_sprs32 (ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, ctx.xer, - ctx.fpscr); -} - -/* Fetch register REGNO if != -1 or all registers otherwise from - kernel thread TID. - - AIX provides a way to query all of a kernel thread's GPRs, FPRs, or - SPRs, but there's no way to query individual registers within those - groups. Therefore, if REGNO != -1, this function fetches an entire - group. - - Unfortunately, kernel thread register queries often fail with - EPERM, indicating that the thread is in kernel space. This breaks - backtraces of threads other than the current one. To make that - breakage obvious without throwing an error to top level (which is - bad e.g. during "info threads" output), zero registers that can't - be retrieved. */ - -static void -fetch_regs_kernel_thread (int regno, pthdb_tid_t tid) -{ - uint64_t gprs64[32]; - uint32_t gprs32[32]; - double fprs[32]; - struct ptxsprs sprs64; - struct ptsprs sprs32; - int i; - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n", - (long) tid, regno, arch64); - - /* General-purpose registers. */ - if (regno == -1 || regno < FP0_REGNUM) - { - if (arch64) - { - if (!ptrace64aix (PTT_READ_GPRS, tid, - (unsigned long) gprs64, 0, NULL)) - memset (gprs64, 0, sizeof (gprs64)); - supply_gprs64 (gprs64); - } - else - { - if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL)) - memset (gprs32, 0, sizeof (gprs32)); - for (i = 0; i < 32; i++) - supply_reg32 (i, gprs32[i]); - } - } - - /* Floating-point registers. */ - - if (regno == -1 || (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)) - { - if (!ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL)) - memset (fprs, 0, sizeof (fprs)); - supply_fprs (fprs); - } - - /* Special-purpose registers. */ - - if (regno == -1 || special_register_p (regno)) - { - if (arch64) - { - if (!ptrace64aix (PTT_READ_SPRS, tid, - (unsigned long) &sprs64, 0, NULL)) - memset (&sprs64, 0, sizeof (sprs64)); - supply_sprs64 (sprs64.pt_iar, sprs64.pt_msr, sprs64.pt_cr, - sprs64.pt_lr, sprs64.pt_ctr, sprs64.pt_xer, - sprs64.pt_fpscr); - } - else - { - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL)) - memset (&sprs32, 0, sizeof (sprs32)); - supply_sprs32 (sprs32.pt_iar, sprs32.pt_msr, sprs32.pt_cr, - sprs32.pt_lr, sprs32.pt_ctr, sprs32.pt_xer, - sprs32.pt_fpscr); - - if (tdep->ppc_mq_regnum >= 0) - supply_register (tdep->ppc_mq_regnum, (char *) &sprs32.pt_mq); - } - } -} - -/* Fetch register REGNO if != -1 or all registers otherwise in the - thread/process specified by inferior_ptid. */ - -static void -aix_thread_fetch_registers (int regno) -{ - struct thread_info *thread; - pthdb_tid_t tid; - - if (!PD_TID (inferior_ptid)) - base_target.to_fetch_registers (regno); - else - { - thread = find_thread_pid (inferior_ptid); - tid = thread->private->tid; - - if (tid == PTHDB_INVALID_TID) - fetch_regs_user_thread (thread->private->pdtid); - else - fetch_regs_kernel_thread (regno, tid); - } -} - -/* Store the gp registers into an array of uint32_t or uint64_t. */ - -static void -fill_gprs64 (uint64_t *vals) -{ - int regno; - - for (regno = 0; regno < FP0_REGNUM; regno++) - if (register_cached (regno)) - regcache_collect (regno, vals + regno); -} - -static void -fill_gprs32 (uint32_t *vals) -{ - int regno; - - for (regno = 0; regno < FP0_REGNUM; regno++) - if (register_cached (regno)) - regcache_collect (regno, vals + regno); -} - -/* Store the floating point registers into a double array. */ -static void -fill_fprs (double *vals) -{ - int regno; - - for (regno = FP0_REGNUM; regno < FPLAST_REGNUM; regno++) - if (register_cached (regno)) - regcache_collect (regno, vals + regno); -} - -/* Store the special registers into the specified 64-bit and 32-bit - locations. */ - -static void -fill_sprs64 (uint64_t *iar, uint64_t *msr, uint32_t *cr, - uint64_t *lr, uint64_t *ctr, uint32_t *xer, - uint32_t *fpscr) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - /* Verify that the size of the size of the IAR buffer is the - same as the raw size of the PC (in the register cache). If - they're not, then either GDB has been built incorrectly, or - there's some other kind of internal error. To be really safe, - we should check all of the sizes. */ - gdb_assert (sizeof (*iar) == REGISTER_RAW_SIZE (PC_REGNUM)); - - if (register_cached (PC_REGNUM)) - regcache_collect (PC_REGNUM, iar); - if (register_cached (tdep->ppc_ps_regnum)) - regcache_collect (tdep->ppc_ps_regnum, msr); - if (register_cached (tdep->ppc_cr_regnum)) - regcache_collect (tdep->ppc_cr_regnum, cr); - if (register_cached (tdep->ppc_lr_regnum)) - regcache_collect (tdep->ppc_lr_regnum, lr); - if (register_cached (tdep->ppc_ctr_regnum)) - regcache_collect (tdep->ppc_ctr_regnum, ctr); - if (register_cached (tdep->ppc_xer_regnum)) - regcache_collect (tdep->ppc_xer_regnum, xer); - if (register_cached (tdep->ppc_fpscr_regnum)) - regcache_collect (tdep->ppc_fpscr_regnum, fpscr); -} - -static void -fill_sprs32 (unsigned long *iar, unsigned long *msr, unsigned long *cr, - unsigned long *lr, unsigned long *ctr, unsigned long *xer, - unsigned long *fpscr) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - /* Verify that the size of the size of the IAR buffer is the - same as the raw size of the PC (in the register cache). If - they're not, then either GDB has been built incorrectly, or - there's some other kind of internal error. To be really safe, - we should check all of the sizes. - - If this assert() fails, the most likely reason is that GDB was - built incorrectly. In order to make use of many of the header - files in /usr/include/sys, GDB needs to be configured so that - sizeof (long) == 4). */ - gdb_assert (sizeof (*iar) == REGISTER_RAW_SIZE (PC_REGNUM)); - - if (register_cached (PC_REGNUM)) - regcache_collect (PC_REGNUM, iar); - if (register_cached (tdep->ppc_ps_regnum)) - regcache_collect (tdep->ppc_ps_regnum, msr); - if (register_cached (tdep->ppc_cr_regnum)) - regcache_collect (tdep->ppc_cr_regnum, cr); - if (register_cached (tdep->ppc_lr_regnum)) - regcache_collect (tdep->ppc_lr_regnum, lr); - if (register_cached (tdep->ppc_ctr_regnum)) - regcache_collect (tdep->ppc_ctr_regnum, ctr); - if (register_cached (tdep->ppc_xer_regnum)) - regcache_collect (tdep->ppc_xer_regnum, xer); - if (register_cached (tdep->ppc_fpscr_regnum)) - regcache_collect (tdep->ppc_fpscr_regnum, fpscr); -} - -/* Store all registers into pthread PDTID, which doesn't have a kernel - thread. - - It's possible to store a single register into a non-kernel pthread, - but I doubt it's worth the effort. */ - -static void -store_regs_user_thread (pthdb_pthread_t pdtid) -{ - int status, i; - pthdb_context_t ctx; - uint32_t int32; - uint64_t int64; - double dbl; - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "store_regs_user_thread %lx\n", (long) pdtid); - - /* Retrieve the thread's current context for its non-register - values. */ - status = pthdb_pthread_context (pd_session, pdtid, &ctx); - if (status != PTHDB_SUCCESS) - error ("aix-thread: store_registers: pthdb_pthread_context returned %s", - pd_status2str (status)); - - /* Collect general-purpose register values from the regcache. */ - - for (i = 0; i < 32; i++) - if (register_cached (i)) - { - if (arch64) - { - regcache_collect (i, (void *) &int64); - ctx.gpr[i] = int64; - } - else - { - regcache_collect (i, (void *) &int32); - ctx.gpr[i] = int32; - } - } - - /* Collect floating-point register values from the regcache. */ - fill_fprs (ctx.fpr); - - /* Special registers (always kept in ctx as 64 bits). */ - if (arch64) - { - fill_sprs64 (&ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr, &ctx.xer, - &ctx.fpscr); - } - else - { - /* Problem: ctx.iar etc. are 64 bits, but raw_registers are 32. - Solution: use 32-bit temp variables. (The assert() in fill_sprs32() - will fail if the size of an unsigned long is incorrect. If this - happens, GDB needs to be reconfigured so that longs are 32-bits.) */ - unsigned long tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer, - tmp_fpscr; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - fill_sprs32 (&tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, &tmp_ctr, &tmp_xer, - &tmp_fpscr); - if (register_cached (PC_REGNUM)) - ctx.iar = tmp_iar; - if (register_cached (tdep->ppc_ps_regnum)) - ctx.msr = tmp_msr; - if (register_cached (tdep->ppc_cr_regnum)) - ctx.cr = tmp_cr; - if (register_cached (tdep->ppc_lr_regnum)) - ctx.lr = tmp_lr; - if (register_cached (tdep->ppc_ctr_regnum)) - ctx.ctr = tmp_ctr; - if (register_cached (tdep->ppc_xer_regnum)) - ctx.xer = tmp_xer; - if (register_cached (tdep->ppc_xer_regnum)) - ctx.fpscr = tmp_fpscr; - } - - status = pthdb_pthread_setcontext (pd_session, pdtid, &ctx); - if (status != PTHDB_SUCCESS) - error ("aix-thread: store_registers: pthdb_pthread_setcontext returned %s", - pd_status2str (status)); -} - -/* Store register REGNO if != -1 or all registers otherwise into - kernel thread TID. - - AIX provides a way to set all of a kernel thread's GPRs, FPRs, or - SPRs, but there's no way to set individual registers within those - groups. Therefore, if REGNO != -1, this function stores an entire - group. */ - -static void -store_regs_kernel_thread (int regno, pthdb_tid_t tid) -{ - uint64_t gprs64[32]; - uint32_t gprs32[32]; - double fprs[32]; - struct ptxsprs sprs64; - struct ptsprs sprs32; - int i; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, - "store_regs_kernel_thread tid=%lx regno=%d\n", - (long) tid, regno); - - /* General-purpose registers. */ - if (regno == -1 || regno < FP0_REGNUM) - { - if (arch64) - { - /* Pre-fetch: some regs may not be in the cache. */ - ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL); - fill_gprs64 (gprs64); - ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long) gprs64, 0, NULL); - } - else - { - /* Pre-fetch: some regs may not be in the cache. */ - ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL); - fill_gprs32 (gprs32); - ptrace32 (PTT_WRITE_GPRS, tid, gprs32, 0, NULL); - } - } - - /* Floating-point registers. */ - - if (regno == -1 || (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)) - { - /* Pre-fetch: some regs may not be in the cache. */ - ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL); - fill_fprs (fprs); - ptrace32 (PTT_WRITE_FPRS, tid, (int *) fprs, 0, NULL); - } - - /* Special-purpose registers. */ - - if (regno == -1 || special_register_p (regno)) - { - if (arch64) - { - /* Pre-fetch: some registers won't be in the cache. */ - ptrace64aix (PTT_READ_SPRS, tid, - (unsigned long) &sprs64, 0, NULL); - fill_sprs64 (&sprs64.pt_iar, &sprs64.pt_msr, &sprs64.pt_cr, - &sprs64.pt_lr, &sprs64.pt_ctr, &sprs64.pt_xer, - &sprs64.pt_fpscr); - ptrace64aix (PTT_WRITE_SPRS, tid, - (unsigned long) &sprs64, 0, NULL); - } - else - { - /* Pre-fetch: some registers won't be in the cache. */ - ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL); - - fill_sprs32 (&sprs32.pt_iar, &sprs32.pt_msr, &sprs32.pt_cr, - &sprs32.pt_lr, &sprs32.pt_ctr, &sprs32.pt_xer, - &sprs32.pt_fpscr); - - if (tdep->ppc_mq_regnum >= 0) - if (register_cached (tdep->ppc_mq_regnum)) - regcache_collect (tdep->ppc_mq_regnum, &sprs32.pt_mq); - - ptrace32 (PTT_WRITE_SPRS, tid, (int *) &sprs32, 0, NULL); - } - } -} - -/* Store gdb's current view of the register set into the - thread/process specified by inferior_ptid. */ - -static void -aix_thread_store_registers (int regno) -{ - struct thread_info *thread; - pthdb_tid_t tid; - - if (!PD_TID (inferior_ptid)) - base_target.to_store_registers (regno); - else - { - thread = find_thread_pid (inferior_ptid); - tid = thread->private->tid; - - if (tid == PTHDB_INVALID_TID) - store_regs_user_thread (thread->private->pdtid); - else - store_regs_kernel_thread (regno, tid); - } -} - -/* Transfer LEN bytes of memory from GDB address MYADDR to target - address MEMADDR if WRITE and vice versa otherwise. */ - -static int -aix_thread_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, - struct mem_attrib *attrib, - struct target_ops *target) -{ - int n; - struct cleanup *cleanup = save_inferior_ptid (); - - inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); - n = base_target.to_xfer_memory (memaddr, myaddr, len, - write, attrib, &base_target); - do_cleanups (cleanup); - - return n; -} - -/* Kill and forget about the inferior process. */ - -static void -aix_thread_kill (void) -{ - struct cleanup *cleanup = save_inferior_ptid (); - - inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); - base_target.to_kill (); - do_cleanups (cleanup); -} - -/* Clean up after the inferior exits. */ - -static void -aix_thread_mourn_inferior (void) -{ - pd_deactivate (); - base_target.to_mourn_inferior (); -} - -/* Return whether thread PID is still valid. */ - -static int -aix_thread_thread_alive (ptid_t ptid) -{ - if (!PD_TID (ptid)) - return base_target.to_thread_alive (ptid); - - /* We update the thread list every time the child stops, so all - valid threads should be in the thread list. */ - return in_thread_list (ptid); -} - -/* Return a printable representation of composite PID for use in - "info threads" output. */ - -static char * -aix_thread_pid_to_str (ptid_t ptid) -{ - static char *ret = NULL; - - if (!PD_TID (ptid)) - return base_target.to_pid_to_str (ptid); - - /* Free previous return value; a new one will be allocated by - xasprintf(). */ - xfree (ret); - - xasprintf (&ret, "Thread %ld", ptid_get_tid (ptid)); - return ret; -} - -/* Return a printable representation of extra information about - THREAD, for use in "info threads" output. */ - -static char * -aix_thread_extra_thread_info (struct thread_info *thread) -{ - struct ui_file *buf; - int status; - pthdb_pthread_t pdtid; - pthdb_tid_t tid; - pthdb_state_t state; - pthdb_suspendstate_t suspendstate; - pthdb_detachstate_t detachstate; - int cancelpend; - long length; - static char *ret = NULL; - - if (!PD_TID (thread->ptid)) - return NULL; - - buf = mem_fileopen (); - - pdtid = thread->private->pdtid; - tid = thread->private->tid; - - if (tid != PTHDB_INVALID_TID) - fprintf_unfiltered (buf, "tid %d", tid); - - status = pthdb_pthread_state (pd_session, pdtid, &state); - if (status != PTHDB_SUCCESS) - state = PST_NOTSUP; - fprintf_unfiltered (buf, ", %s", state2str (state)); - - status = pthdb_pthread_suspendstate (pd_session, pdtid, - &suspendstate); - if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED) - fprintf_unfiltered (buf, ", suspended"); - - status = pthdb_pthread_detachstate (pd_session, pdtid, - &detachstate); - if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED) - fprintf_unfiltered (buf, ", detached"); - - pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend); - if (status == PTHDB_SUCCESS && cancelpend) - fprintf_unfiltered (buf, ", cancel pending"); - - ui_file_write (buf, "", 1); - - xfree (ret); /* Free old buffer. */ - - ret = ui_file_xstrdup (buf, &length); - ui_file_delete (buf); - - return ret; -} - -/* Initialize target aix_thread_ops. */ - -static void -init_aix_thread_ops (void) -{ - aix_thread_ops.to_shortname = "aix-threads"; - aix_thread_ops.to_longname = "AIX pthread support"; - aix_thread_ops.to_doc = "AIX pthread support"; - - aix_thread_ops.to_attach = aix_thread_attach; - aix_thread_ops.to_detach = aix_thread_detach; - aix_thread_ops.to_resume = aix_thread_resume; - aix_thread_ops.to_wait = aix_thread_wait; - aix_thread_ops.to_fetch_registers = aix_thread_fetch_registers; - aix_thread_ops.to_store_registers = aix_thread_store_registers; - aix_thread_ops.to_xfer_memory = aix_thread_xfer_memory; - /* No need for aix_thread_ops.to_create_inferior, because we activate thread - debugging when the inferior reaches pd_brk_addr. */ - aix_thread_ops.to_kill = aix_thread_kill; - aix_thread_ops.to_mourn_inferior = aix_thread_mourn_inferior; - aix_thread_ops.to_thread_alive = aix_thread_thread_alive; - aix_thread_ops.to_pid_to_str = aix_thread_pid_to_str; - aix_thread_ops.to_extra_thread_info = aix_thread_extra_thread_info; - aix_thread_ops.to_stratum = thread_stratum; - aix_thread_ops.to_magic = OPS_MAGIC; -} - -/* Module startup initialization function, automagically called by - init.c. */ - -void -_initialize_aix_thread (void) -{ - init_aix_thread_ops (); - add_target (&aix_thread_ops); - - /* Notice when object files get loaded and unloaded. */ - target_new_objfile_chain = target_new_objfile_hook; - target_new_objfile_hook = new_objfile; - - add_show_from_set (add_set_cmd ("aix-thread", no_class, var_zinteger, - (char *) &debug_aix_thread, - "Set debugging of AIX thread module.\n" - "Enables printf debugging output.\n", - &setdebuglist), - &showdebuglist); -} |