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d59d4e2f3a
Currently in AIX, the private data is used to maintain the kernel thread ID. This is a patch to trim the need to have another field in the private data of a thread in AIX. We want to use the lwp field to represent the kernel thread ID to match or make things similar to the Linux targets.
2093 lines
62 KiB
C
2093 lines
62 KiB
C
/* Low level interface for debugging AIX 4.3+ pthreads.
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Copyright (C) 1999-2024 Free Software Foundation, Inc.
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Written by Nick Duffek <nsd@redhat.com>.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* This module uses the libpthdebug.a library provided by AIX 4.3+ for
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debugging pthread applications.
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Some name prefix conventions:
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pthdb_ provided by libpthdebug.a
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pdc_ callbacks that this module provides to libpthdebug.a
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pd_ variables or functions interfacing with libpthdebug.a
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libpthdebug peculiarities:
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- pthdb_ptid_pthread() is prototyped in <sys/pthdebug.h>, but
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it's not documented, and after several calls it stops working
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and causes other libpthdebug functions to fail.
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- pthdb_tid_pthread() doesn't always work after
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pthdb_session_update(), but it does work after cycling through
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all threads using pthdb_pthread().
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*/
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#include "gdbthread.h"
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#include "target.h"
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#include "inferior.h"
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#include "regcache.h"
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#include "cli/cli-cmds.h"
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#include "ppc-tdep.h"
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#include "observable.h"
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#include "objfiles.h"
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#include <procinfo.h>
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <sys/reg.h>
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#include <sched.h>
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#include <sys/pthdebug.h>
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#include <unordered_set>
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#if !HAVE_DECL_GETTHRDS
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extern int getthrds (pid_t, struct thrdsinfo64 *, int, tid_t *, int);
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#endif
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/* Whether to emit debugging output. */
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static bool debug_aix_thread;
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/* In AIX 5.1, functions use pthdb_tid_t instead of tid_t. */
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#ifndef PTHDB_VERSION_3
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#define pthdb_tid_t tid_t
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#endif
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/* Success and failure values returned by pthdb callbacks. */
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#define PDC_SUCCESS PTHDB_SUCCESS
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#define PDC_FAILURE PTHDB_CALLBACK
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/* Private data attached to each element in GDB's thread list. */
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struct aix_thread_info : public private_thread_info
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{
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pthdb_pthread_t pdtid; /* thread's libpthdebug id */
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};
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/* Return the aix_thread_info attached to THREAD. */
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static aix_thread_info *
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get_aix_thread_info (thread_info *thread)
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{
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return gdb::checked_static_cast<aix_thread_info *> (thread->priv.get ());
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}
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/* Information about a thread of which libpthdebug is aware. */
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struct pd_thread {
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pthdb_pthread_t pdtid;
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pthread_t pthid;
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pthdb_tid_t tid;
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};
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/* This module's target-specific operations, active while pd_able is true. */
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static const target_info aix_thread_target_info = {
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"aix-threads",
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N_("AIX pthread support"),
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N_("AIX pthread support")
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};
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class aix_thread_target final : public target_ops
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{
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public:
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const target_info &info () const override
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{ return aix_thread_target_info; }
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strata stratum () const override { return thread_stratum; }
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void detach (inferior *, int) override;
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void resume (ptid_t, int, enum gdb_signal) override;
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ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override;
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void fetch_registers (struct regcache *, int) override;
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void store_registers (struct regcache *, int) override;
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enum target_xfer_status xfer_partial (enum target_object object,
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const char *annex,
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gdb_byte *readbuf,
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const gdb_byte *writebuf,
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ULONGEST offset, ULONGEST len,
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ULONGEST *xfered_len) override;
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void mourn_inferior () override;
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bool thread_alive (ptid_t ptid) override;
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std::string pid_to_str (ptid_t) override;
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const char *extra_thread_info (struct thread_info *) override;
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ptid_t get_ada_task_ptid (long lwp, ULONGEST thread) override;
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void update_thread_list () override;
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};
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static aix_thread_target aix_thread_ops;
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/* Forward declarations for pthdb callbacks. */
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static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int);
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static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t);
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static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t);
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static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid,
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unsigned long long flags,
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pthdb_context_t *context);
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static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid,
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unsigned long long flags,
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pthdb_context_t *context);
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static int pdc_alloc (pthdb_user_t, size_t, void **);
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static int pdc_realloc (pthdb_user_t, void *, size_t, void **);
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static int pdc_dealloc (pthdb_user_t, void *);
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/* pthdb callbacks. */
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static pthdb_callbacks_t pd_callbacks = {
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pdc_symbol_addrs,
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pdc_read_data,
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pdc_write_data,
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pdc_read_regs,
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pdc_write_regs,
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pdc_alloc,
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pdc_realloc,
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pdc_dealloc,
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NULL
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};
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/* Aix variable structure. */
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struct aix_thread_variables
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{
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/* Whether the current application is debuggable by pthdb. */
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int pd_able;
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/* Whether a threaded application is being debugged. */
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int pd_active;
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/* Current pthdb session. */
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pthdb_session_t pd_session;
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/* Address of the function that libpthread will call when libpthdebug
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is ready to be initialized. */
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CORE_ADDR pd_brk_addr;
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/* Whether the current architecture is 64-bit.
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Only valid when pd_able is true. */
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int arch64;
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/* Describes the number of thread exit events reported. */
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std::unordered_set<pthdb_pthread_t> exited_threads;
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};
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/* Key to our per-inferior data. */
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static const registry<inferior>::key<aix_thread_variables>
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aix_thread_variables_handle;
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/* Function to Get aix_thread_variables data. */
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static struct aix_thread_variables*
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get_aix_thread_variables_data (struct inferior *inf)
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{
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if (inf == NULL)
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return NULL;
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struct aix_thread_variables* data;
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data = aix_thread_variables_handle.get (inf);
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if (data == NULL)
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data = aix_thread_variables_handle.emplace (inf);
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return data;
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}
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/* Helper to get data for ptid in a function. */
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static struct aix_thread_variables*
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get_thread_data_helper_for_ptid (ptid_t ptid)
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{
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inferior *inf = find_inferior_ptid (current_inferior ()->process_target (),
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ptid);
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return get_aix_thread_variables_data (inf);
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}
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/* Helper to get data for pid in a function. */
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static struct aix_thread_variables*
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get_thread_data_helper_for_pid (pid_t pid)
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{
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inferior *inf = find_inferior_pid (current_inferior ()->process_target (),
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pid);
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return get_aix_thread_variables_data (inf);
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}
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/* Return a printable representation of pthdebug function return
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STATUS. */
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static const char *
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pd_status2str (int status)
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{
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switch (status)
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{
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case PTHDB_SUCCESS: return "SUCCESS";
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case PTHDB_NOSYS: return "NOSYS";
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case PTHDB_NOTSUP: return "NOTSUP";
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case PTHDB_BAD_VERSION: return "BAD_VERSION";
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case PTHDB_BAD_USER: return "BAD_USER";
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case PTHDB_BAD_SESSION: return "BAD_SESSION";
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case PTHDB_BAD_MODE: return "BAD_MODE";
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case PTHDB_BAD_FLAGS: return "BAD_FLAGS";
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case PTHDB_BAD_CALLBACK: return "BAD_CALLBACK";
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case PTHDB_BAD_POINTER: return "BAD_POINTER";
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case PTHDB_BAD_CMD: return "BAD_CMD";
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case PTHDB_BAD_PTHREAD: return "BAD_PTHREAD";
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case PTHDB_BAD_ATTR: return "BAD_ATTR";
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case PTHDB_BAD_MUTEX: return "BAD_MUTEX";
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case PTHDB_BAD_MUTEXATTR: return "BAD_MUTEXATTR";
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case PTHDB_BAD_COND: return "BAD_COND";
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case PTHDB_BAD_CONDATTR: return "BAD_CONDATTR";
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case PTHDB_BAD_RWLOCK: return "BAD_RWLOCK";
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case PTHDB_BAD_RWLOCKATTR: return "BAD_RWLOCKATTR";
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case PTHDB_BAD_KEY: return "BAD_KEY";
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case PTHDB_BAD_PTID: return "BAD_PTID";
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case PTHDB_BAD_TID: return "BAD_TID";
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case PTHDB_CALLBACK: return "CALLBACK";
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case PTHDB_CONTEXT: return "CONTEXT";
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case PTHDB_HELD: return "HELD";
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case PTHDB_NOT_HELD: return "NOT_HELD";
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case PTHDB_MEMORY: return "MEMORY";
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case PTHDB_NOT_PTHREADED: return "NOT_PTHREADED";
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case PTHDB_SYMBOL: return "SYMBOL";
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case PTHDB_NOT_AVAIL: return "NOT_AVAIL";
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case PTHDB_INTERNAL: return "INTERNAL";
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default: return "UNKNOWN";
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}
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}
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/* A call to ptrace(REQ, ID, ...) just returned RET. Check for
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exceptional conditions and either return nonlocally or else return
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1 for success and 0 for failure. */
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static int
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ptrace_check (int req, int id, int ret)
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{
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if (ret == 0 && !errno)
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return 1;
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/* According to ptrace(2), ptrace may fail with EPERM if "the
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Identifier parameter corresponds to a kernel thread which is
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stopped in kernel mode and whose computational state cannot be
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read or written." This happens quite often with register reads. */
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switch (req)
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{
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case PTT_READ_GPRS:
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case PTT_READ_FPRS:
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case PTT_READ_SPRS:
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if (ret == -1 && errno == EPERM)
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{
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if (debug_aix_thread)
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gdb_printf (gdb_stdlog,
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"ptrace (%d, %d) = %d (errno = %d)\n",
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req, id, ret, errno);
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return ret == -1 ? 0 : 1;
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}
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break;
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case PTT_READ_VEC:
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case PTT_READ_VSX:
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if (debug_aix_thread)
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gdb_printf (gdb_stdlog,
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"ptrace (%d, %d) = %d (errno = %d)\n",
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req, id, ret, errno);
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if (ret == -1)
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return -1;
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break;
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}
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error (_("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)"),
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req, id, ret, errno, safe_strerror (errno));
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return 0; /* Not reached. */
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}
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/* Call ptracex (REQ, ID, ADDR, DATA, BUF) or
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ptrace64 (REQ, ID, ADDR, DATA, BUF) if HAVE_PTRACE64.
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Return success. */
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#ifdef HAVE_PTRACE64
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# define ptracex(request, pid, addr, data, buf) \
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ptrace64 (request, pid, addr, data, buf)
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#endif
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static int
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ptrace64aix (int req, int id, long long addr, int data, int *buf)
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{
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errno = 0;
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return ptrace_check (req, id, ptracex (req, id, addr, data, buf));
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}
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/* Call ptrace (REQ, ID, ADDR, DATA, BUF) or
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ptrace64 (REQ, ID, ADDR, DATA, BUF) if HAVE_PTRACE64.
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Return success. */
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#ifdef HAVE_PTRACE64
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# define ptrace(request, pid, addr, data, buf) \
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ptrace64 (request, pid, addr, data, buf)
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# define addr_ptr long long
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#else
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# define addr_ptr int *
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#endif
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static int
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ptrace32 (int req, int id, addr_ptr addr, int data, int *buf)
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{
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errno = 0;
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return ptrace_check (req, id,
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ptrace (req, id, addr, data, buf));
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}
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/* If *PIDP is a composite process/thread id, convert it to a
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process id. */
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static void
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pid_to_prc (ptid_t *ptidp)
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{
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ptid_t ptid;
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ptid = *ptidp;
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if (ptid.tid () != 0)
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*ptidp = ptid_t (ptid.pid ());
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}
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/* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to
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the address of SYMBOLS[<i>].name. */
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static int
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pdc_symbol_addrs (pthdb_user_t user_current_pid, pthdb_symbol_t *symbols, int count)
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{
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struct bound_minimal_symbol ms;
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int i;
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char *name;
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if (debug_aix_thread)
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gdb_printf (gdb_stdlog,
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"pdc_symbol_addrs (user_current_pid = %ld, symbols = 0x%lx, count = %d)\n",
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user_current_pid, (long) symbols, count);
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for (i = 0; i < count; i++)
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{
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name = symbols[i].name;
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if (debug_aix_thread)
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gdb_printf (gdb_stdlog,
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" symbols[%d].name = \"%s\"\n", i, name);
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if (!*name)
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symbols[i].addr = 0;
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else
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{
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ms = lookup_minimal_symbol (name, NULL, NULL);
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if (ms.minsym == NULL)
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{
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if (debug_aix_thread)
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gdb_printf (gdb_stdlog, " returning PDC_FAILURE\n");
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return PDC_FAILURE;
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}
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symbols[i].addr = ms.value_address ();
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}
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if (debug_aix_thread)
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gdb_printf (gdb_stdlog, " symbols[%d].addr = %s\n",
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i, hex_string (symbols[i].addr));
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}
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if (debug_aix_thread)
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gdb_printf (gdb_stdlog, " returning PDC_SUCCESS\n");
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return PDC_SUCCESS;
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}
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/* Read registers call back function should be able to read the
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context information of a debuggee kernel thread from an active
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process or from a core file. The information should be formatted
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in context64 form for both 32-bit and 64-bit process.
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If successful return 0, else non-zero is returned. */
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static int
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pdc_read_regs (pthdb_user_t user_current_pid,
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pthdb_tid_t tid,
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unsigned long long flags,
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pthdb_context_t *context)
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{
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/* This function doesn't appear to be used, so we could probably
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just return 0 here. HOWEVER, if it is not defined, the OS will
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complain and several thread debug functions will fail. In case
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this is needed, I have implemented what I think it should do,
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however this code is untested. */
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uint64_t gprs64[ppc_num_gprs];
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uint32_t gprs32[ppc_num_gprs];
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double fprs[ppc_num_fprs];
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struct ptxsprs sprs64;
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struct ptsprs sprs32;
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struct aix_thread_variables *data;
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data = get_thread_data_helper_for_pid (user_current_pid);
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if (debug_aix_thread)
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gdb_printf (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n",
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(int) tid, hex_string (flags));
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/* General-purpose registers. */
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if (flags & PTHDB_FLAG_GPRS)
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{
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if (data->arch64)
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{
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if (!ptrace64aix (PTT_READ_GPRS, tid,
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(unsigned long) gprs64, 0, NULL))
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memset (gprs64, 0, sizeof (gprs64));
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memcpy (context->gpr, gprs64, sizeof(gprs64));
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}
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else
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{
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if (!ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL))
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memset (gprs32, 0, sizeof (gprs32));
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memcpy (context->gpr, gprs32, sizeof(gprs32));
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}
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}
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/* Floating-point registers. */
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if (flags & PTHDB_FLAG_FPRS)
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{
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if (!ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL))
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memset (fprs, 0, sizeof (fprs));
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memcpy (context->fpr, fprs, sizeof(fprs));
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}
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/* Special-purpose registers. */
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if (flags & PTHDB_FLAG_SPRS)
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{
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if (data->arch64)
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{
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if (!ptrace64aix (PTT_READ_SPRS, tid,
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(unsigned long) &sprs64, 0, NULL))
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memset (&sprs64, 0, sizeof (sprs64));
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memcpy (&context->msr, &sprs64, sizeof(sprs64));
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}
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else
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{
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if (!ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL))
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memset (&sprs32, 0, sizeof (sprs32));
|
|
memcpy (&context->msr, &sprs32, sizeof(sprs32));
|
|
}
|
|
}
|
|
|
|
/* vector registers. */
|
|
__vmx_context_t vmx;
|
|
if (__power_vmx() && (flags & PTHDB_FLAG_REGS))
|
|
{
|
|
if (data->arch64)
|
|
{
|
|
if (!ptrace64aix (PTT_READ_VEC, tid, (long long) &vmx, 0, 0))
|
|
memset (&vmx, 0, sizeof (vmx));
|
|
memcpy (&context->vmx, &vmx, sizeof(__vmx_context_t));
|
|
}
|
|
else
|
|
{
|
|
if (!ptrace32 (PTT_READ_VEC, tid, (long long) &vmx, 0, 0))
|
|
memset (&vmx, 0, sizeof (vmx));
|
|
memcpy (&context->vmx, &vmx, sizeof(__vmx_context_t));
|
|
}
|
|
}
|
|
|
|
/* vsx registers. */
|
|
__vsx_context_t vsx;
|
|
if (__power_vsx() && (flags & PTHDB_FLAG_REGS))
|
|
{
|
|
if (data->arch64)
|
|
{
|
|
if (!ptrace64aix (PTT_READ_VSX, tid, (long long) &vsx, 0, 0))
|
|
memset (&vsx, 0, sizeof (vsx));
|
|
memcpy (&context->vsx, &vsx, sizeof(__vsx_context_t));
|
|
}
|
|
else
|
|
{
|
|
if (!ptrace32 (PTT_READ_VSX, tid, (long long) &vsx, 0, 0))
|
|
memset (&vsx, 0, sizeof (vsx));
|
|
memcpy (&context->vsx, &vsx, sizeof(__vsx_context_t));
|
|
}
|
|
}
|
|
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_current_pid,
|
|
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. */
|
|
|
|
struct aix_thread_variables *data;
|
|
|
|
data = get_thread_data_helper_for_pid (user_current_pid);
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog, "pdc_write_regs tid=%d flags=%s\n",
|
|
(int) tid, hex_string (flags));
|
|
|
|
/* General-purpose registers. */
|
|
if (flags & PTHDB_FLAG_GPRS)
|
|
{
|
|
if (data->arch64)
|
|
ptrace64aix (PTT_WRITE_GPRS, tid,
|
|
(unsigned long) context->gpr, 0, NULL);
|
|
else
|
|
ptrace32 (PTT_WRITE_GPRS, tid, (uintptr_t) context->gpr, 0, NULL);
|
|
}
|
|
|
|
/* Floating-point registers. */
|
|
if (flags & PTHDB_FLAG_FPRS)
|
|
{
|
|
ptrace32 (PTT_WRITE_FPRS, tid, (uintptr_t) context->fpr, 0, NULL);
|
|
}
|
|
|
|
/* Special-purpose registers. */
|
|
if (flags & PTHDB_FLAG_SPRS)
|
|
{
|
|
if (data->arch64)
|
|
{
|
|
ptrace64aix (PTT_WRITE_SPRS, tid,
|
|
(unsigned long) &context->msr, 0, NULL);
|
|
}
|
|
else
|
|
{
|
|
ptrace32 (PTT_WRITE_SPRS, tid, (uintptr_t) &context->msr, 0, NULL);
|
|
}
|
|
}
|
|
|
|
/* vector registers. */
|
|
if (__power_vmx() && (flags & PTHDB_FLAG_REGS))
|
|
{
|
|
if (data->arch64)
|
|
ptrace64aix (PTT_WRITE_VEC, tid, (unsigned long) &context->vmx, 0, 0);
|
|
else
|
|
ptrace32 (PTT_WRITE_VEC, tid, (uintptr_t) &context->vmx, 0, 0);
|
|
}
|
|
|
|
/* vsx registers. */
|
|
if (__power_vsx() && (flags & PTHDB_FLAG_REGS))
|
|
{
|
|
if (data->arch64)
|
|
ptrace64aix (PTT_WRITE_VSX, tid, (unsigned long) &context->vsx, 0, 0);
|
|
else
|
|
ptrace32 (PTT_WRITE_VSX, tid, (uintptr_t) &context->vsx, 0, 0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* pthdb callback: read LEN bytes from process ADDR into BUF. */
|
|
|
|
static int
|
|
pdc_read_data (pthdb_user_t user_current_pid, void *buf,
|
|
pthdb_addr_t addr, size_t len)
|
|
{
|
|
int status, ret;
|
|
inferior *inf = find_inferior_pid (current_inferior ()->process_target (),
|
|
user_current_pid);
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"pdc_read_data (user_current_pid = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
|
|
user_current_pid, (long) buf, hex_string (addr), len);
|
|
|
|
/* This is needed to eliminate the dependency of current thread
|
|
which is null so that thread reads the correct target memory. */
|
|
{
|
|
scoped_restore_current_inferior_for_memory save_inferior (inf);
|
|
status = target_read_memory (addr, (gdb_byte *) buf, len);
|
|
}
|
|
ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE;
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (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_current_pid, void *buf,
|
|
pthdb_addr_t addr, size_t len)
|
|
{
|
|
int status, ret;
|
|
inferior *inf = find_inferior_pid (current_inferior ()->process_target (),
|
|
user_current_pid);
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"pdc_write_data (user_current_pid = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
|
|
user_current_pid, (long) buf, hex_string (addr), len);
|
|
|
|
{
|
|
scoped_restore_current_inferior_for_memory save_inferior (inf);
|
|
status = target_write_memory (addr, (gdb_byte *) buf, len);
|
|
}
|
|
|
|
ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE;
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (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_current_pid, size_t len, void **bufp)
|
|
{
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"pdc_alloc (user_current_pid = %ld, len = %ld, bufp = 0x%lx)\n",
|
|
user_current_pid, len, (long) bufp);
|
|
*bufp = xmalloc (len);
|
|
if (debug_aix_thread)
|
|
gdb_printf (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_current_pid, void *buf, size_t len, void **bufp)
|
|
{
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"pdc_realloc (user_current_pid = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n",
|
|
user_current_pid, (long) buf, len, (long) bufp);
|
|
*bufp = xrealloc (buf, len);
|
|
if (debug_aix_thread)
|
|
gdb_printf (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_current_pid, void *buf)
|
|
{
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"pdc_free (user_current_pid = %ld, buf = 0x%lx)\n", user_current_pid,
|
|
(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:
|
|
/* i18n: Like "Thread-Id %d, [state] idle" */
|
|
return _("idle"); /* being created */
|
|
case PST_RUN:
|
|
/* i18n: Like "Thread-Id %d, [state] running" */
|
|
return _("running"); /* running */
|
|
case PST_SLEEP:
|
|
/* i18n: Like "Thread-Id %d, [state] sleeping" */
|
|
return _("sleeping"); /* awaiting an event */
|
|
case PST_READY:
|
|
/* i18n: Like "Thread-Id %d, [state] ready" */
|
|
return _("ready"); /* runnable */
|
|
case PST_TERM:
|
|
/* i18n: Like "Thread-Id %d, [state] finished" */
|
|
return _("finished"); /* awaiting a join/detach */
|
|
default:
|
|
/* i18n: Like "Thread-Id %d, [state] unknown" */
|
|
return _("unknown");
|
|
}
|
|
}
|
|
|
|
/* Search through the list of all kernel threads for the thread
|
|
that has stopped on a SIGTRAP signal, and return its TID.
|
|
Return 0 if none found. */
|
|
|
|
static pthdb_tid_t
|
|
get_signaled_thread (int pid)
|
|
{
|
|
struct thrdsinfo64 thrinf;
|
|
tid_t ktid = 0;
|
|
|
|
while (1)
|
|
{
|
|
if (getthrds (pid, &thrinf,
|
|
sizeof (thrinf), &ktid, 1) != 1)
|
|
break;
|
|
|
|
/* We also need to keep in mind Trap and interrupt or any
|
|
signal that needs to be handled in pd_update (). */
|
|
|
|
if (thrinf.ti_cursig)
|
|
return thrinf.ti_tid;
|
|
}
|
|
|
|
/* Didn't find any thread stopped on a SIGTRAP signal. */
|
|
return 0;
|
|
}
|
|
|
|
/* 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 (pid_t pid)
|
|
{
|
|
int cmd, status;
|
|
pthdb_pthread_t pdtid;
|
|
pthread_t pthid;
|
|
pthdb_tid_t tid;
|
|
process_stratum_target *proc_target = current_inferior ()->process_target ();
|
|
struct aix_thread_variables *data;
|
|
data = get_thread_data_helper_for_pid (pid);
|
|
pthdb_state_t state;
|
|
std::set<pthdb_pthread_t> in_queue_threads;
|
|
|
|
/* Accumulate an array of libpthdebug threads sorted by pthread id. */
|
|
|
|
for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT)
|
|
{
|
|
status = pthdb_pthread (data->pd_session, &pdtid, cmd);
|
|
if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD)
|
|
break;
|
|
|
|
status = pthdb_pthread_ptid (data->pd_session, pdtid, &pthid);
|
|
if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID)
|
|
continue;
|
|
|
|
status = pthdb_pthread_tid (data->pd_session, pdtid, &tid);
|
|
ptid_t ptid (pid, tid, pthid);
|
|
|
|
status = pthdb_pthread_state (data->pd_session, pdtid, &state);
|
|
in_queue_threads.insert (pdtid);
|
|
|
|
/* If this thread has reported and exited, do not add it again. */
|
|
if (state == PST_TERM)
|
|
{
|
|
if (data->exited_threads.count (pdtid) != 0)
|
|
continue;
|
|
}
|
|
|
|
/* If this thread has never been reported to GDB, add it. */
|
|
if (!in_thread_list (proc_target, ptid))
|
|
{
|
|
aix_thread_info *priv = new aix_thread_info;
|
|
/* init priv */
|
|
priv->pdtid = pdtid;
|
|
/* Check if this is the main thread. If it is, then change
|
|
its ptid and add its private data. */
|
|
if (in_thread_list (proc_target, ptid_t (pid)))
|
|
{
|
|
thread_info *tp = proc_target->find_thread (ptid_t (pid));
|
|
thread_change_ptid (proc_target, ptid_t (pid), ptid);
|
|
tp->priv.reset (priv);
|
|
}
|
|
else
|
|
add_thread_with_info (proc_target, ptid,
|
|
private_thread_info_up (priv));
|
|
}
|
|
|
|
/* The thread is terminated. Remove it. */
|
|
if (state == PST_TERM)
|
|
{
|
|
thread_info *thr = proc_target->find_thread (ptid);
|
|
gdb_assert (thr != nullptr);
|
|
delete_thread (thr);
|
|
data->exited_threads.insert (pdtid);
|
|
}
|
|
}
|
|
|
|
/* Sometimes there can be scenarios where the thread status is
|
|
unknown and we it will never iterate in the for loop above,
|
|
since cmd will be no longer be pointing to that threads. One
|
|
such scenario is the gdb.threads/thread_events.exp testcase
|
|
where in the end after the threadfunc breakpoint is hit, the
|
|
thread exits and gets into a PST_UNKNOWN state. So this thread
|
|
will not run in the above for loop. Therefore the below for loop
|
|
is to manually delete such threads. */
|
|
for (struct thread_info *it : all_threads ())
|
|
{
|
|
aix_thread_info *priv = get_aix_thread_info (it);
|
|
if (in_queue_threads.count (priv->pdtid) == 0
|
|
&& in_thread_list (proc_target, it->ptid)
|
|
&& pid == it->ptid.pid ())
|
|
{
|
|
delete_thread (it);
|
|
data->exited_threads.insert (priv->pdtid);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Iterate_over_threads() callback for locating a thread, using
|
|
the TID of its associated kernel thread. */
|
|
|
|
static int
|
|
iter_tid (struct thread_info *thread, void *tidp)
|
|
{
|
|
const pthdb_tid_t tid = *(pthdb_tid_t *)tidp;
|
|
return thread->ptid.lwp () == tid;
|
|
}
|
|
|
|
/* Synchronize libpthdebug's state with the inferior and with GDB,
|
|
generate a composite process/thread <pid> for the current thread,
|
|
Return the ptid of the event thread if one can be found, else
|
|
return a pid-only ptid with PID. */
|
|
|
|
static ptid_t
|
|
pd_update (pid_t pid)
|
|
{
|
|
int status;
|
|
ptid_t ptid;
|
|
pthdb_tid_t tid;
|
|
struct thread_info *thread = NULL;
|
|
struct aix_thread_variables *data;
|
|
|
|
data = get_thread_data_helper_for_pid (pid);
|
|
|
|
if (!data->pd_active)
|
|
return ptid_t (pid);
|
|
|
|
status = pthdb_session_update (data->pd_session);
|
|
if (status != PTHDB_SUCCESS)
|
|
return ptid_t (pid);
|
|
|
|
sync_threadlists (pid);
|
|
|
|
/* Define "current thread" as one that just received a trap signal. */
|
|
|
|
tid = get_signaled_thread (pid);
|
|
if (tid != 0)
|
|
thread = iterate_over_threads (iter_tid, &tid);
|
|
if (!thread)
|
|
ptid = ptid_t (pid);
|
|
else
|
|
ptid = thread->ptid;
|
|
|
|
return ptid;
|
|
}
|
|
|
|
/* Try to start debugging threads in the current process.
|
|
If successful and there exists and we can find an event thread, set
|
|
pd_active for that thread. Otherwise, return. */
|
|
|
|
static void
|
|
pd_activate (pid_t pid)
|
|
{
|
|
int status;
|
|
struct aix_thread_variables *data;
|
|
data = get_thread_data_helper_for_pid (pid);
|
|
|
|
status = pthdb_session_init (pid, data->arch64 ? PEM_64BIT : PEM_32BIT,
|
|
PTHDB_FLAG_REGS, &pd_callbacks,
|
|
&data->pd_session);
|
|
if (status == PTHDB_SUCCESS)
|
|
data->pd_active = 1;
|
|
}
|
|
|
|
/* AIX implementation of update_thread_list. */
|
|
|
|
void
|
|
aix_thread_target::update_thread_list ()
|
|
{
|
|
for (inferior *inf : all_inferiors ())
|
|
{
|
|
if (inf->pid == 0)
|
|
continue;
|
|
|
|
pd_update (inf->pid);
|
|
}
|
|
}
|
|
|
|
|
|
/* 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 (inferior *inf)
|
|
{
|
|
int status;
|
|
char *stub_name;
|
|
struct bound_minimal_symbol ms;
|
|
struct aix_thread_variables *data;
|
|
|
|
if (inf == NULL)
|
|
return;
|
|
|
|
data = get_aix_thread_variables_data (inf);
|
|
|
|
/* Don't initialize twice. */
|
|
if (data->pd_able)
|
|
return;
|
|
|
|
/* Check application word size. */
|
|
data->arch64 = register_size (current_inferior ()->arch (), 0) == 8;
|
|
|
|
/* Check whether the application is pthreaded. */
|
|
stub_name = NULL;
|
|
status = pthdb_session_pthreaded (inf->pid, 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. */
|
|
ms = lookup_minimal_symbol (stub_name, NULL, NULL);
|
|
if (ms.minsym == NULL)
|
|
return;
|
|
data->pd_brk_addr = ms.value_address ();
|
|
if (!create_thread_event_breakpoint (current_inferior ()->arch (),
|
|
data->pd_brk_addr))
|
|
return;
|
|
|
|
/* Prepare for thread debugging. */
|
|
current_inferior ()->push_target (&aix_thread_ops);
|
|
data->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 (inf->pid);
|
|
}
|
|
|
|
/* Undo the effects of pd_enable(). */
|
|
|
|
static void
|
|
pd_disable (inferior *inf)
|
|
{
|
|
struct aix_thread_variables *data;
|
|
data = get_aix_thread_variables_data (inf);
|
|
|
|
if (!data->pd_able)
|
|
return;
|
|
if (!data->pd_active)
|
|
return;
|
|
pthdb_session_destroy (data->pd_session);
|
|
|
|
pid_to_prc (&inferior_ptid);
|
|
data->pd_active = 0;
|
|
data->pd_able = 0;
|
|
current_inferior ()->unpush_target (&aix_thread_ops);
|
|
}
|
|
|
|
/* new_objfile observer callback.
|
|
|
|
Check whether a threaded application is being debugged, and if so, prepare
|
|
for thread debugging. */
|
|
|
|
static void
|
|
new_objfile (struct objfile *objfile)
|
|
{
|
|
pd_enable (current_inferior ());
|
|
}
|
|
|
|
/* Attach to process specified by ARGS. */
|
|
|
|
static void
|
|
aix_thread_inferior_created (inferior *inf)
|
|
{
|
|
pd_enable (inf);
|
|
}
|
|
|
|
/* Detach from the process attached to by aix_thread_attach(). */
|
|
|
|
void
|
|
aix_thread_target::detach (inferior *inf, int from_tty)
|
|
{
|
|
target_ops *beneath = this->beneath ();
|
|
|
|
pd_disable (inf);
|
|
beneath->detach (inf, from_tty);
|
|
}
|
|
|
|
/* Tell the inferior process to continue running thread PID if != -1
|
|
and all threads otherwise. */
|
|
|
|
void
|
|
aix_thread_target::resume (ptid_t ptid, int step, enum gdb_signal sig)
|
|
{
|
|
struct thread_info *thread;
|
|
pthdb_tid_t tid[2];
|
|
struct aix_thread_variables *data;
|
|
|
|
data = get_thread_data_helper_for_ptid (ptid);
|
|
|
|
if (ptid.tid () == 0)
|
|
{
|
|
scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
|
|
|
|
inferior_ptid = ptid_t (inferior_ptid.pid ());
|
|
beneath ()->resume (ptid, step, sig);
|
|
}
|
|
else
|
|
{
|
|
thread = current_inferior ()->find_thread (ptid);
|
|
if (!thread)
|
|
error (_("aix-thread resume: unknown pthread %ld"),
|
|
ptid.lwp ());
|
|
|
|
aix_thread_info *priv = get_aix_thread_info (thread);
|
|
|
|
tid[0] = ptid.lwp ();
|
|
if (tid[0] == PTHDB_INVALID_TID)
|
|
error (_("aix-thread resume: no tid for pthread %ld"),
|
|
ptid.lwp ());
|
|
tid[1] = 0;
|
|
|
|
if (data->arch64)
|
|
ptrace64aix (PTT_CONTINUE, tid[0], (long long) 1,
|
|
gdb_signal_to_host (sig), (PTRACE_TYPE_ARG5) tid);
|
|
else
|
|
ptrace32 (PTT_CONTINUE, tid[0], (addr_ptr) 1,
|
|
gdb_signal_to_host (sig), (PTRACE_TYPE_ARG5) 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. */
|
|
|
|
ptid_t
|
|
aix_thread_target::wait (ptid_t ptid, struct target_waitstatus *status,
|
|
target_wait_flags options)
|
|
{
|
|
struct aix_thread_variables *data;
|
|
{
|
|
pid_to_prc (&ptid);
|
|
|
|
ptid = beneath ()->wait (ptid, status, options);
|
|
}
|
|
|
|
if (ptid.pid () == -1)
|
|
return ptid_t (-1);
|
|
|
|
/* The target beneath does not deal with threads, so it should only return
|
|
pid-only ptids. */
|
|
gdb_assert (ptid.is_pid ());
|
|
|
|
data = get_thread_data_helper_for_ptid (ptid);
|
|
|
|
/* Check whether libpthdebug might be ready to be initialized. */
|
|
if (!data->pd_active && status->kind () == TARGET_WAITKIND_STOPPED
|
|
&& status->sig () == GDB_SIGNAL_TRAP)
|
|
{
|
|
process_stratum_target *proc_target
|
|
= current_inferior ()->process_target ();
|
|
struct regcache *regcache = get_thread_regcache (proc_target, ptid);
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
|
|
if (regcache_read_pc (regcache)
|
|
- gdbarch_decr_pc_after_break (gdbarch) == data->pd_brk_addr)
|
|
pd_activate (ptid.pid ());
|
|
}
|
|
|
|
return pd_update (ptid.pid ());
|
|
}
|
|
|
|
/* Supply AIX altivec registers, both 64 and 32 bit. */
|
|
|
|
static void
|
|
supply_altivec_regs (struct regcache *regcache, __vmx_context_t vmx)
|
|
{
|
|
ppc_gdbarch_tdep *tdep
|
|
= gdbarch_tdep<ppc_gdbarch_tdep> (regcache->arch ());
|
|
int regno;
|
|
for (regno = 0; regno < ppc_num_vrs; regno++)
|
|
regcache->raw_supply (tdep->ppc_vr0_regnum + regno,
|
|
&(vmx.__vr[regno]));
|
|
regcache->raw_supply (tdep->ppc_vrsave_regnum, &(vmx.__vrsave));
|
|
regcache->raw_supply (tdep->ppc_vrsave_regnum - 1, &(vmx.__vscr));
|
|
}
|
|
|
|
/* Supply AIX VSX registers, both 64 and 32 bit. */
|
|
|
|
static void
|
|
supply_vsx_regs (struct regcache *regcache, __vsx_context_t vsx)
|
|
{
|
|
ppc_gdbarch_tdep *tdep
|
|
= gdbarch_tdep<ppc_gdbarch_tdep> (regcache->arch ());
|
|
int regno;
|
|
|
|
for (regno = 0; regno < ppc_num_vshrs; regno++)
|
|
regcache->raw_supply (tdep->ppc_vsr0_upper_regnum + regno,
|
|
&(vsx.__vsr_dw1[regno]));
|
|
}
|
|
|
|
/* Record that the 64-bit general-purpose registers contain VALS. */
|
|
|
|
static void
|
|
supply_gprs64 (struct regcache *regcache, uint64_t *vals)
|
|
{
|
|
ppc_gdbarch_tdep *tdep
|
|
= gdbarch_tdep<ppc_gdbarch_tdep> (regcache->arch ());
|
|
int regno;
|
|
|
|
for (regno = 0; regno < ppc_num_gprs; regno++)
|
|
regcache->raw_supply (tdep->ppc_gp0_regnum + regno,
|
|
(char *) (vals + regno));
|
|
}
|
|
|
|
/* Record that 32-bit register REGNO contains VAL. */
|
|
|
|
static void
|
|
supply_reg32 (struct regcache *regcache, int regno, uint32_t val)
|
|
{
|
|
regcache->raw_supply (regno, (char *) &val);
|
|
}
|
|
|
|
/* Record that the floating-point registers contain VALS. */
|
|
|
|
static void
|
|
supply_fprs (struct regcache *regcache, double *vals)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
int regno;
|
|
|
|
/* This function should never be called on architectures without
|
|
floating-point registers. */
|
|
gdb_assert (ppc_floating_point_unit_p (gdbarch));
|
|
|
|
for (regno = tdep->ppc_fp0_regnum;
|
|
regno < tdep->ppc_fp0_regnum + ppc_num_fprs;
|
|
regno++)
|
|
regcache->raw_supply (regno,
|
|
(char *) (vals + regno - tdep->ppc_fp0_regnum));
|
|
}
|
|
|
|
/* Predicate to test whether given register number is a "special" register. */
|
|
static int
|
|
special_register_p (struct gdbarch *gdbarch, int regno)
|
|
{
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
|
|
return regno == gdbarch_pc_regnum (gdbarch)
|
|
|| 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
|
|
|| (tdep->ppc_fpscr_regnum >= 0 && 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 (struct regcache *regcache,
|
|
uint64_t iar, uint64_t msr, uint32_t cr,
|
|
uint64_t lr, uint64_t ctr, uint32_t xer,
|
|
uint32_t fpscr)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
|
|
regcache->raw_supply (gdbarch_pc_regnum (gdbarch), (char *) &iar);
|
|
regcache->raw_supply (tdep->ppc_ps_regnum, (char *) &msr);
|
|
regcache->raw_supply (tdep->ppc_cr_regnum, (char *) &cr);
|
|
regcache->raw_supply (tdep->ppc_lr_regnum, (char *) &lr);
|
|
regcache->raw_supply (tdep->ppc_ctr_regnum, (char *) &ctr);
|
|
regcache->raw_supply (tdep->ppc_xer_regnum, (char *) &xer);
|
|
if (tdep->ppc_fpscr_regnum >= 0)
|
|
regcache->raw_supply (tdep->ppc_fpscr_regnum, (char *) &fpscr);
|
|
}
|
|
|
|
/* Record that the special registers contain the specified 32-bit
|
|
values. */
|
|
|
|
static void
|
|
supply_sprs32 (struct regcache *regcache,
|
|
uint32_t iar, uint32_t msr, uint32_t cr,
|
|
uint32_t lr, uint32_t ctr, uint32_t xer,
|
|
uint32_t fpscr)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
|
|
regcache->raw_supply (gdbarch_pc_regnum (gdbarch), (char *) &iar);
|
|
regcache->raw_supply (tdep->ppc_ps_regnum, (char *) &msr);
|
|
regcache->raw_supply (tdep->ppc_cr_regnum, (char *) &cr);
|
|
regcache->raw_supply (tdep->ppc_lr_regnum, (char *) &lr);
|
|
regcache->raw_supply (tdep->ppc_ctr_regnum, (char *) &ctr);
|
|
regcache->raw_supply (tdep->ppc_xer_regnum, (char *) &xer);
|
|
if (tdep->ppc_fpscr_regnum >= 0)
|
|
regcache->raw_supply (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 (struct regcache *regcache, pthdb_pthread_t pdtid)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
int status, i;
|
|
pthdb_context_t ctx;
|
|
struct aix_thread_variables *data;
|
|
data = get_thread_data_helper_for_ptid (inferior_ptid);
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"fetch_regs_user_thread %lx\n", (long) pdtid);
|
|
status = pthdb_pthread_context (data->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 (data->arch64)
|
|
supply_gprs64 (regcache, ctx.gpr);
|
|
else
|
|
for (i = 0; i < ppc_num_gprs; i++)
|
|
supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, ctx.gpr[i]);
|
|
|
|
/* Floating-point registers. */
|
|
|
|
if (ppc_floating_point_unit_p (gdbarch))
|
|
supply_fprs (regcache, ctx.fpr);
|
|
|
|
/* Special registers. */
|
|
|
|
if (data->arch64)
|
|
supply_sprs64 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr,
|
|
ctx.xer, ctx.fpscr);
|
|
else
|
|
supply_sprs32 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr,
|
|
ctx.xer, ctx.fpscr);
|
|
|
|
/* Altivec registers. */
|
|
supply_altivec_regs (regcache, ctx.vmx);
|
|
|
|
/* VSX registers. */
|
|
supply_vsx_regs (regcache, ctx.vsx);
|
|
}
|
|
|
|
/* 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 (struct regcache *regcache, int regno,
|
|
pthdb_tid_t tid)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
uint64_t gprs64[ppc_num_gprs];
|
|
uint32_t gprs32[ppc_num_gprs];
|
|
double fprs[ppc_num_fprs];
|
|
struct ptxsprs sprs64;
|
|
struct ptsprs sprs32;
|
|
int i;
|
|
struct aix_thread_variables *data;
|
|
|
|
data = get_thread_data_helper_for_ptid (regcache->ptid ());
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n",
|
|
(long) tid, regno, data->arch64);
|
|
|
|
/* General-purpose registers. */
|
|
if (regno == -1
|
|
|| (tdep->ppc_gp0_regnum <= regno
|
|
&& regno < tdep->ppc_gp0_regnum + ppc_num_gprs))
|
|
{
|
|
if (data->arch64)
|
|
{
|
|
if (!ptrace64aix (PTT_READ_GPRS, tid,
|
|
(unsigned long) gprs64, 0, NULL))
|
|
memset (gprs64, 0, sizeof (gprs64));
|
|
supply_gprs64 (regcache, gprs64);
|
|
}
|
|
else
|
|
{
|
|
if (!ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL))
|
|
memset (gprs32, 0, sizeof (gprs32));
|
|
for (i = 0; i < ppc_num_gprs; i++)
|
|
supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, gprs32[i]);
|
|
}
|
|
}
|
|
|
|
/* vector registers. */
|
|
if (tdep->ppc_vr0_regnum != -1)
|
|
{
|
|
int ret = 0;
|
|
__vmx_context_t vmx;
|
|
if (data->arch64)
|
|
ret = ptrace64aix (PTT_READ_VEC, tid, (long long) &vmx, 0, 0);
|
|
else
|
|
ret = ptrace32 (PTT_READ_VEC, tid, (uintptr_t) &vmx, 0, 0);
|
|
if (ret < 0)
|
|
memset(&vmx, 0, sizeof(__vmx_context_t));
|
|
for (i = 0; i < ppc_num_vrs; i++)
|
|
regcache->raw_supply (tdep->ppc_vr0_regnum + i, &(vmx.__vr[i]));
|
|
regcache->raw_supply (tdep->ppc_vrsave_regnum, &(vmx.__vrsave));
|
|
regcache->raw_supply (tdep->ppc_vrsave_regnum - 1, &(vmx.__vscr));
|
|
}
|
|
|
|
/* vsx registers. */
|
|
if (tdep->ppc_vsr0_upper_regnum != -1)
|
|
{
|
|
__vsx_context_t vsx;
|
|
int ret = 0;
|
|
if (data->arch64)
|
|
ret = ptrace64aix (PTT_READ_VSX, tid, (long long) &vsx, 0, 0);
|
|
else
|
|
ret = ptrace32 (PTT_READ_VSX, tid, (long long) &vsx, 0, 0);
|
|
if (ret < 0)
|
|
memset(&vsx, 0, sizeof(__vsx_context_t));
|
|
for (i = 0; i < ppc_num_vshrs; i++)
|
|
regcache->raw_supply (tdep->ppc_vsr0_upper_regnum + i, &(vsx.__vsr_dw1[i]));
|
|
}
|
|
|
|
/* Floating-point registers. */
|
|
|
|
if (ppc_floating_point_unit_p (gdbarch)
|
|
&& (regno == -1
|
|
|| (regno >= tdep->ppc_fp0_regnum
|
|
&& regno < tdep->ppc_fp0_regnum + ppc_num_fprs)))
|
|
{
|
|
if (!ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL))
|
|
memset (fprs, 0, sizeof (fprs));
|
|
supply_fprs (regcache, fprs);
|
|
}
|
|
|
|
/* Special-purpose registers. */
|
|
|
|
if (regno == -1 || special_register_p (gdbarch, regno))
|
|
{
|
|
if (data->arch64)
|
|
{
|
|
if (!ptrace64aix (PTT_READ_SPRS, tid,
|
|
(unsigned long) &sprs64, 0, NULL))
|
|
memset (&sprs64, 0, sizeof (sprs64));
|
|
supply_sprs64 (regcache, sprs64.pt_iar, sprs64.pt_msr,
|
|
sprs64.pt_cr, sprs64.pt_lr, sprs64.pt_ctr,
|
|
sprs64.pt_xer, sprs64.pt_fpscr);
|
|
}
|
|
else
|
|
{
|
|
if (!ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL))
|
|
memset (&sprs32, 0, sizeof (sprs32));
|
|
supply_sprs32 (regcache, 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)
|
|
regcache->raw_supply (tdep->ppc_mq_regnum, (char *) &sprs32.pt_mq);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Fetch register REGNO if != -1 or all registers otherwise from the
|
|
thread/process connected to REGCACHE. */
|
|
|
|
void
|
|
aix_thread_target::fetch_registers (struct regcache *regcache, int regno)
|
|
{
|
|
struct thread_info *thread;
|
|
pthdb_tid_t tid;
|
|
|
|
/* If a new inferior is born, then its pthread debug library is yet to
|
|
initialised and hence has no private data. So the below if condition
|
|
exists. */
|
|
|
|
if (regcache->ptid ().tid () == 0)
|
|
beneath ()->fetch_registers (regcache, regno);
|
|
else
|
|
{
|
|
thread = current_inferior ()->find_thread (regcache->ptid ());
|
|
aix_thread_info *priv = get_aix_thread_info (thread);
|
|
tid = regcache->ptid().lwp ();
|
|
|
|
if (tid == PTHDB_INVALID_TID)
|
|
fetch_regs_user_thread (regcache, priv->pdtid);
|
|
else
|
|
fetch_regs_kernel_thread (regcache, regno, tid);
|
|
}
|
|
}
|
|
|
|
/* Fill altivec registers. */
|
|
|
|
static void
|
|
fill_altivec (const struct regcache *regcache, __vmx_context_t *vmx)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
int regno;
|
|
|
|
for (regno = 0; regno < ppc_num_vrs; regno++)
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_vr0_regnum + regno))
|
|
regcache->raw_collect (tdep->ppc_vr0_regnum + regno,
|
|
&(vmx->__vr[regno]));
|
|
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_vrsave_regnum))
|
|
regcache->raw_collect (tdep->ppc_vrsave_regnum, &(vmx->__vrsave));
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_vrsave_regnum - 1))
|
|
regcache->raw_collect (tdep->ppc_vrsave_regnum - 1, &(vmx->__vscr));
|
|
}
|
|
|
|
/* Fill vsx registers. */
|
|
|
|
static void
|
|
fill_vsx (const struct regcache *regcache, __vsx_context_t *vsx)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
int regno;
|
|
|
|
for (regno = 0; regno < ppc_num_vshrs; regno++)
|
|
if (REG_VALID == regcache->get_register_status ( tdep->ppc_vsr0_upper_regnum + regno))
|
|
regcache->raw_collect (tdep->ppc_vsr0_upper_regnum + regno,
|
|
&(vsx->__vsr_dw1[0]) + regno);
|
|
}
|
|
|
|
/* Store the gp registers into an array of uint32_t or uint64_t. */
|
|
|
|
static void
|
|
fill_gprs64 (const struct regcache *regcache, uint64_t *vals)
|
|
{
|
|
ppc_gdbarch_tdep *tdep
|
|
= gdbarch_tdep<ppc_gdbarch_tdep> (regcache->arch ());
|
|
int regno;
|
|
|
|
for (regno = 0; regno < ppc_num_gprs; regno++)
|
|
if (REG_VALID == regcache->get_register_status
|
|
(tdep->ppc_gp0_regnum + regno))
|
|
regcache->raw_collect (tdep->ppc_gp0_regnum + regno, vals + regno);
|
|
}
|
|
|
|
static void
|
|
fill_gprs32 (const struct regcache *regcache, uint32_t *vals)
|
|
{
|
|
ppc_gdbarch_tdep *tdep
|
|
= gdbarch_tdep<ppc_gdbarch_tdep> (regcache->arch ());
|
|
int regno;
|
|
|
|
for (regno = 0; regno < ppc_num_gprs; regno++)
|
|
if (REG_VALID == regcache->get_register_status
|
|
(tdep->ppc_gp0_regnum + regno))
|
|
regcache->raw_collect (tdep->ppc_gp0_regnum + regno, vals + regno);
|
|
}
|
|
|
|
/* Store the floating point registers into a double array. */
|
|
static void
|
|
fill_fprs (const struct regcache *regcache, double *vals)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
int regno;
|
|
|
|
/* This function should never be called on architectures without
|
|
floating-point registers. */
|
|
gdb_assert (ppc_floating_point_unit_p (gdbarch));
|
|
|
|
for (regno = tdep->ppc_fp0_regnum;
|
|
regno < tdep->ppc_fp0_regnum + ppc_num_fprs;
|
|
regno++)
|
|
if (REG_VALID == regcache->get_register_status (regno))
|
|
regcache->raw_collect (regno, vals + regno - tdep->ppc_fp0_regnum);
|
|
}
|
|
|
|
/* Store the special registers into the specified 64-bit and 32-bit
|
|
locations. */
|
|
|
|
static void
|
|
fill_sprs64 (const struct regcache *regcache,
|
|
uint64_t *iar, uint64_t *msr, uint32_t *cr,
|
|
uint64_t *lr, uint64_t *ctr, uint32_t *xer,
|
|
uint32_t *fpscr)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (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_size
|
|
(gdbarch, gdbarch_pc_regnum (gdbarch)));
|
|
|
|
if (REG_VALID == regcache->get_register_status (gdbarch_pc_regnum (gdbarch)))
|
|
regcache->raw_collect (gdbarch_pc_regnum (gdbarch), iar);
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_ps_regnum))
|
|
regcache->raw_collect (tdep->ppc_ps_regnum, msr);
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_cr_regnum))
|
|
regcache->raw_collect (tdep->ppc_cr_regnum, cr);
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_lr_regnum))
|
|
regcache->raw_collect (tdep->ppc_lr_regnum, lr);
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_ctr_regnum))
|
|
regcache->raw_collect (tdep->ppc_ctr_regnum, ctr);
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum))
|
|
regcache->raw_collect (tdep->ppc_xer_regnum, xer);
|
|
if (tdep->ppc_fpscr_regnum >= 0
|
|
&& REG_VALID == regcache->get_register_status (tdep->ppc_fpscr_regnum))
|
|
regcache->raw_collect (tdep->ppc_fpscr_regnum, fpscr);
|
|
}
|
|
|
|
static void
|
|
fill_sprs32 (const struct regcache *regcache,
|
|
uint32_t *iar, uint32_t *msr, uint32_t *cr,
|
|
uint32_t *lr, uint32_t *ctr, uint32_t *xer,
|
|
uint32_t *fpscr)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (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_size (gdbarch,
|
|
gdbarch_pc_regnum (gdbarch)));
|
|
|
|
if (REG_VALID == regcache->get_register_status (gdbarch_pc_regnum (gdbarch)))
|
|
regcache->raw_collect (gdbarch_pc_regnum (gdbarch), iar);
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_ps_regnum))
|
|
regcache->raw_collect (tdep->ppc_ps_regnum, msr);
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_cr_regnum))
|
|
regcache->raw_collect (tdep->ppc_cr_regnum, cr);
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_lr_regnum))
|
|
regcache->raw_collect (tdep->ppc_lr_regnum, lr);
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_ctr_regnum))
|
|
regcache->raw_collect (tdep->ppc_ctr_regnum, ctr);
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum))
|
|
regcache->raw_collect (tdep->ppc_xer_regnum, xer);
|
|
if (tdep->ppc_fpscr_regnum >= 0
|
|
&& REG_VALID == regcache->get_register_status (tdep->ppc_fpscr_regnum))
|
|
regcache->raw_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 (const struct regcache *regcache, pthdb_pthread_t pdtid)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
int status, i;
|
|
pthdb_context_t ctx;
|
|
uint32_t int32;
|
|
uint64_t int64;
|
|
struct aix_thread_variables *data;
|
|
data = get_thread_data_helper_for_ptid (inferior_ptid);
|
|
__vmx_context_t vmx;
|
|
__vsx_context_t vsx;
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (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 (data->pd_session, pdtid, &ctx);
|
|
if (status != PTHDB_SUCCESS)
|
|
error (_("aix-thread: store_registers: pthdb_pthread_context returned %s"),
|
|
pd_status2str (status));
|
|
|
|
/* Fill altivec-registers. */
|
|
|
|
if (__power_vmx())
|
|
{
|
|
memset(&vmx, 0, sizeof(__vmx_context_t));
|
|
for (i = 0; i < ppc_num_vrs; i++)
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_vr0_regnum + i))
|
|
{
|
|
regcache->raw_collect (tdep->ppc_vr0_regnum + i,
|
|
&(vmx.__vr[i]));
|
|
ctx.vmx.__vr[i] = vmx.__vr[i];
|
|
}
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_vrsave_regnum))
|
|
ctx.vmx.__vrsave = vmx.__vrsave;
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_vrsave_regnum - 1))
|
|
ctx.vmx.__vscr = vmx.__vscr;
|
|
}
|
|
|
|
/* Fill vsx registers. */
|
|
|
|
if (__power_vsx())
|
|
{
|
|
memset(&vsx, 0, sizeof(__vsx_context_t));
|
|
for (i = 0; i < ppc_num_vshrs; i++)
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_vsr0_regnum + i))
|
|
{
|
|
regcache->raw_collect (tdep->ppc_vr0_regnum + i,
|
|
&(vsx.__vsr_dw1[i]));
|
|
ctx.vsx.__vsr_dw1[i] = vsx.__vsr_dw1[i];
|
|
}
|
|
}
|
|
|
|
/* Collect general-purpose register values from the regcache. */
|
|
|
|
for (i = 0; i < ppc_num_gprs; i++)
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_gp0_regnum + i))
|
|
{
|
|
if (data->arch64)
|
|
{
|
|
regcache->raw_collect (tdep->ppc_gp0_regnum + i, (void *) &int64);
|
|
ctx.gpr[i] = int64;
|
|
}
|
|
else
|
|
{
|
|
regcache->raw_collect (tdep->ppc_gp0_regnum + i, (void *) &int32);
|
|
ctx.gpr[i] = int32;
|
|
}
|
|
}
|
|
|
|
/* Collect floating-point register values from the regcache. */
|
|
if (ppc_floating_point_unit_p (gdbarch))
|
|
fill_fprs (regcache, ctx.fpr);
|
|
|
|
/* Special registers (always kept in ctx as 64 bits). */
|
|
if (data->arch64)
|
|
{
|
|
fill_sprs64 (regcache, &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. */
|
|
uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer,
|
|
tmp_fpscr;
|
|
|
|
fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, &tmp_ctr,
|
|
&tmp_xer, &tmp_fpscr);
|
|
if (REG_VALID == regcache->get_register_status
|
|
(gdbarch_pc_regnum (gdbarch)))
|
|
ctx.iar = tmp_iar;
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_ps_regnum))
|
|
ctx.msr = tmp_msr;
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_cr_regnum))
|
|
ctx.cr = tmp_cr;
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_lr_regnum))
|
|
ctx.lr = tmp_lr;
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_ctr_regnum))
|
|
ctx.ctr = tmp_ctr;
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum))
|
|
ctx.xer = tmp_xer;
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum))
|
|
ctx.fpscr = tmp_fpscr;
|
|
}
|
|
|
|
status = pthdb_pthread_setcontext (data->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 (const struct regcache *regcache, int regno,
|
|
pthdb_tid_t tid)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
|
|
uint64_t gprs64[ppc_num_gprs];
|
|
uint32_t gprs32[ppc_num_gprs];
|
|
double fprs[ppc_num_fprs];
|
|
struct ptxsprs sprs64;
|
|
struct ptsprs sprs32;
|
|
struct aix_thread_variables *data;
|
|
int ret = 0;
|
|
|
|
data = get_thread_data_helper_for_ptid (regcache->ptid ());
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"store_regs_kernel_thread tid=%lx regno=%d\n",
|
|
(long) tid, regno);
|
|
|
|
/* General-purpose registers. */
|
|
if (regno == -1
|
|
|| (tdep->ppc_gp0_regnum <= regno
|
|
&& regno < tdep->ppc_gp0_regnum + ppc_num_fprs))
|
|
{
|
|
if (data->arch64)
|
|
{
|
|
/* Pre-fetch: some regs may not be in the cache. */
|
|
ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL);
|
|
fill_gprs64 (regcache, 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, (uintptr_t) gprs32, 0, NULL);
|
|
fill_gprs32 (regcache, gprs32);
|
|
ptrace32 (PTT_WRITE_GPRS, tid, (uintptr_t) gprs32, 0, NULL);
|
|
}
|
|
}
|
|
|
|
/* Floating-point registers. */
|
|
|
|
if (ppc_floating_point_unit_p (gdbarch)
|
|
&& (regno == -1
|
|
|| (regno >= tdep->ppc_fp0_regnum
|
|
&& regno < tdep->ppc_fp0_regnum + ppc_num_fprs)))
|
|
{
|
|
/* Pre-fetch: some regs may not be in the cache. */
|
|
ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL);
|
|
fill_fprs (regcache, fprs);
|
|
ptrace32 (PTT_WRITE_FPRS, tid, (uintptr_t) fprs, 0, NULL);
|
|
}
|
|
|
|
/* Special-purpose registers. */
|
|
|
|
if (regno == -1 || special_register_p (gdbarch, regno))
|
|
{
|
|
if (data->arch64)
|
|
{
|
|
/* Pre-fetch: some registers won't be in the cache. */
|
|
ptrace64aix (PTT_READ_SPRS, tid,
|
|
(unsigned long) &sprs64, 0, NULL);
|
|
fill_sprs64 (regcache, &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
|
|
{
|
|
/* The contents of "struct ptspr" were declared as "unsigned
|
|
long" up to AIX 5.2, but are "unsigned int" since 5.3.
|
|
Use temporaries to work around this problem. Also, add an
|
|
assert here to make sure we fail if the system header files
|
|
use "unsigned long", and the size of that type is not what
|
|
the headers expect. */
|
|
uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer,
|
|
tmp_fpscr;
|
|
|
|
gdb_assert (sizeof (sprs32.pt_iar) == 4);
|
|
|
|
/* Pre-fetch: some registers won't be in the cache. */
|
|
ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL);
|
|
|
|
fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr,
|
|
&tmp_ctr, &tmp_xer, &tmp_fpscr);
|
|
|
|
sprs32.pt_iar = tmp_iar;
|
|
sprs32.pt_msr = tmp_msr;
|
|
sprs32.pt_cr = tmp_cr;
|
|
sprs32.pt_lr = tmp_lr;
|
|
sprs32.pt_ctr = tmp_ctr;
|
|
sprs32.pt_xer = tmp_xer;
|
|
sprs32.pt_fpscr = tmp_fpscr;
|
|
|
|
if (tdep->ppc_mq_regnum >= 0)
|
|
if (REG_VALID == regcache->get_register_status
|
|
(tdep->ppc_mq_regnum))
|
|
regcache->raw_collect (tdep->ppc_mq_regnum, &sprs32.pt_mq);
|
|
|
|
ptrace32 (PTT_WRITE_SPRS, tid, (uintptr_t) &sprs32, 0, NULL);
|
|
}
|
|
}
|
|
|
|
/* Vector registers. */
|
|
if (tdep->ppc_vr0_regnum != -1 && tdep->ppc_vrsave_regnum != -1
|
|
&& (regno == -1 || (regno >= tdep->ppc_vr0_regnum
|
|
&& regno <= tdep->ppc_vrsave_regnum)))
|
|
{
|
|
__vmx_context_t vmx;
|
|
if (__power_vmx())
|
|
{
|
|
if (data->arch64)
|
|
ret = ptrace64aix (PTT_READ_VEC, tid, (long long) &vmx, 0, 0);
|
|
else
|
|
ret = ptrace32 (PTT_READ_VEC, tid, (long long) &vmx, 0, 0);
|
|
if (ret > 0)
|
|
{
|
|
fill_altivec(regcache, &vmx);
|
|
if (data->arch64)
|
|
ret = ptrace64aix (PTT_WRITE_VEC, tid, (long long) &vmx, 0, 0);
|
|
else
|
|
ret = ptrace32 (PTT_WRITE_VEC, tid, (long long) &vmx, 0, 0);
|
|
if (ret < 0)
|
|
perror_with_name (_("Unable to store AltiVec register after read"));
|
|
}
|
|
}
|
|
}
|
|
|
|
/* VSX registers. */
|
|
if (tdep->ppc_vsr0_upper_regnum != -1 && (regno == -1
|
|
|| (regno >=tdep->ppc_vsr0_upper_regnum
|
|
&& regno < tdep->ppc_vsr0_upper_regnum + ppc_num_vshrs)))
|
|
{
|
|
__vsx_context_t vsx;
|
|
if (__power_vsx())
|
|
{
|
|
if (data->arch64)
|
|
ret = ptrace64aix (PTT_READ_VSX, tid, (long long) &vsx, 0, 0);
|
|
else
|
|
ret = ptrace32 (PTT_READ_VSX, tid, (long long) &vsx, 0, 0);
|
|
if (ret > 0)
|
|
{
|
|
fill_vsx (regcache, &vsx);
|
|
if (data->arch64)
|
|
ret = ptrace64aix (PTT_WRITE_VSX, tid, (long long) &vsx, 0, 0);
|
|
else
|
|
ret = ptrace32 (PTT_WRITE_VSX, tid, (long long) &vsx, 0, 0);
|
|
if (ret < 0)
|
|
perror_with_name (_("Unable to store VSX register after read"));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Store gdb's current view of the register set into the
|
|
thread/process connected to REGCACHE. */
|
|
|
|
void
|
|
aix_thread_target::store_registers (struct regcache *regcache, int regno)
|
|
{
|
|
struct thread_info *thread;
|
|
pthdb_tid_t tid;
|
|
|
|
if (regcache->ptid ().tid () == 0)
|
|
beneath ()->store_registers (regcache, regno);
|
|
else
|
|
{
|
|
thread = current_inferior ()->find_thread (regcache->ptid ());
|
|
aix_thread_info *priv = get_aix_thread_info (thread);
|
|
tid = regcache->ptid ().lwp ();
|
|
|
|
if (tid == PTHDB_INVALID_TID)
|
|
store_regs_user_thread (regcache, priv->pdtid);
|
|
else
|
|
store_regs_kernel_thread (regcache, regno, tid);
|
|
}
|
|
}
|
|
|
|
/* Implement the to_xfer_partial target_ops method. */
|
|
|
|
enum target_xfer_status
|
|
aix_thread_target::xfer_partial (enum target_object object,
|
|
const char *annex, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf,
|
|
ULONGEST offset, ULONGEST len,
|
|
ULONGEST *xfered_len)
|
|
{
|
|
scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
|
|
|
|
inferior_ptid = ptid_t (inferior_ptid.pid ());
|
|
return beneath ()->xfer_partial (object, annex, readbuf,
|
|
writebuf, offset, len, xfered_len);
|
|
}
|
|
|
|
/* Clean up after the inferior exits. */
|
|
|
|
void
|
|
aix_thread_target::mourn_inferior ()
|
|
{
|
|
target_ops *beneath = this->beneath ();
|
|
|
|
pd_disable (current_inferior ());
|
|
beneath->mourn_inferior ();
|
|
}
|
|
|
|
/* Return whether thread PID is still valid. */
|
|
|
|
bool
|
|
aix_thread_target::thread_alive (ptid_t ptid)
|
|
{
|
|
if (ptid.tid () == 0)
|
|
return beneath ()->thread_alive (ptid);
|
|
|
|
/* We update the thread list every time the child stops, so all
|
|
valid threads should be in the thread list. */
|
|
process_stratum_target *proc_target
|
|
= current_inferior ()->process_target ();
|
|
return in_thread_list (proc_target, ptid);
|
|
}
|
|
|
|
/* Return a printable representation of composite PID for use in
|
|
"info threads" output. */
|
|
|
|
std::string
|
|
aix_thread_target::pid_to_str (ptid_t ptid)
|
|
{
|
|
thread_info *thread_info = current_inferior ()->find_thread (ptid);
|
|
|
|
if (thread_info != NULL && thread_info->priv != NULL)
|
|
{
|
|
aix_thread_info *priv = get_aix_thread_info (thread_info);
|
|
|
|
return string_printf (_("Thread %s (tid %s)"), pulongest (ptid.tid ()),
|
|
pulongest (ptid.lwp ()));
|
|
}
|
|
|
|
return beneath ()->pid_to_str (ptid);
|
|
}
|
|
|
|
/* Return a printable representation of extra information about
|
|
THREAD, for use in "info threads" output. */
|
|
|
|
const char *
|
|
aix_thread_target::extra_thread_info (struct thread_info *thread)
|
|
{
|
|
int status;
|
|
pthdb_pthread_t pdtid;
|
|
pthdb_state_t state;
|
|
pthdb_suspendstate_t suspendstate;
|
|
pthdb_detachstate_t detachstate;
|
|
int cancelpend;
|
|
static char *ret = NULL;
|
|
struct aix_thread_variables *data;
|
|
|
|
data = get_thread_data_helper_for_ptid (thread->ptid);
|
|
|
|
if (thread->ptid.tid () == 0)
|
|
return NULL;
|
|
|
|
string_file buf;
|
|
aix_thread_info *priv = get_aix_thread_info (thread);
|
|
|
|
pdtid = priv->pdtid;
|
|
|
|
status = pthdb_pthread_state (data->pd_session, pdtid, &state);
|
|
|
|
/* Output should look like Thread %d (tid %d) ([state]). */
|
|
/* Example:- Thread 1 (tid 34144587) ([running]). */
|
|
/* where state can be running, idle, sleeping, finished,
|
|
suspended, detached, cancel pending, ready or unknown. */
|
|
|
|
if (status != PTHDB_SUCCESS)
|
|
state = PST_NOTSUP;
|
|
buf.printf ("[%s]", state2str (state));
|
|
|
|
status = pthdb_pthread_suspendstate (data->pd_session, pdtid,
|
|
&suspendstate);
|
|
if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED)
|
|
buf.printf (_("[suspended]"));
|
|
|
|
status = pthdb_pthread_detachstate (data->pd_session, pdtid,
|
|
&detachstate);
|
|
if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED)
|
|
buf.printf (_("[detached]"));
|
|
|
|
pthdb_pthread_cancelpend (data->pd_session, pdtid, &cancelpend);
|
|
if (status == PTHDB_SUCCESS && cancelpend)
|
|
buf.printf (_("[cancel pending]"));
|
|
|
|
buf.write ("", 1);
|
|
|
|
xfree (ret); /* Free old buffer. */
|
|
|
|
ret = xstrdup (buf.c_str ());
|
|
|
|
return ret;
|
|
}
|
|
|
|
ptid_t
|
|
aix_thread_target::get_ada_task_ptid (long lwp, ULONGEST thread)
|
|
{
|
|
return ptid_t (inferior_ptid.pid (), 0, thread);
|
|
}
|
|
|
|
|
|
/* Module startup initialization function, automagically called by
|
|
init.c. */
|
|
|
|
void _initialize_aix_thread ();
|
|
void
|
|
_initialize_aix_thread ()
|
|
{
|
|
/* Notice when object files get loaded and unloaded. */
|
|
gdb::observers::new_objfile.attach (new_objfile, "aix-thread");
|
|
|
|
/* Add ourselves to inferior_created event chain.
|
|
This is needed to enable the thread target on "attach". */
|
|
gdb::observers::inferior_created.attach (aix_thread_inferior_created,
|
|
"aix-thread");
|
|
|
|
add_setshow_boolean_cmd ("aix-thread", class_maintenance, &debug_aix_thread,
|
|
_("Set debugging of AIX thread module."),
|
|
_("Show debugging of AIX thread module."),
|
|
_("Enables debugging output (used to debug GDB)."),
|
|
NULL, NULL,
|
|
/* FIXME: i18n: Debugging of AIX thread
|
|
module is \"%d\". */
|
|
&setdebuglist, &showdebuglist);
|
|
}
|