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c0abbd96b4
Trying to run a simple program (empty main) on AIX, I get: (gdb) run Starting program: /scratch/simark/build/gdb/a.out Child process unexpectedly missing: There are no child processes.. ../../src/binutils-gdb/gdb/inferior.c:304: internal-error: find_inferior_pid: Assertion `pid != 0' failed. A problem internal to GDB has been detected, further debugging may prove unreliable. ----- Backtrace ----- 0x10ef12a8 gdb_internal_backtrace_1() ../../src/binutils-gdb/gdb/bt-utils.c:122 0x10ef1470 gdb_internal_backtrace() ../../src/binutils-gdb/gdb/bt-utils.c:168 0x1004d368 internal_vproblem(internal_problem*, char const*, int, char const*, char*) ../../src/binutils-gdb/gdb/utils.c:396 0x1004d8a8 internal_verror(char const*, int, char const*, char*) ../../src/binutils-gdb/gdb/utils.c:476 0x1004c424 internal_error(char const*, int, char const*, ...) ../../src/binutils-gdb/gdbsupport/errors.cc:55 0x102ab344 find_inferior_pid(process_stratum_target*, int) ../../src/binutils-gdb/gdb/inferior.c:304 0x102ab4a4 find_inferior_ptid(process_stratum_target*, ptid_t) ../../src/binutils-gdb/gdb/inferior.c:318 0x1061bae8 find_thread_ptid(process_stratum_target*, ptid_t) ../../src/binutils-gdb/gdb/thread.c:519 0x10319e98 handle_inferior_event(execution_control_state*) ../../src/binutils-gdb/gdb/infrun.c:5532 0x10315544 fetch_inferior_event() ../../src/binutils-gdb/gdb/infrun.c:4221 0x10952e34 inferior_event_handler(inferior_event_type) ../../src/binutils-gdb/gdb/inf-loop.c:41 0x1032640c infrun_async_inferior_event_handler(void*) ../../src/binutils-gdb/gdb/infrun.c:9548 0x10673188 check_async_event_handlers() ../../src/binutils-gdb/gdb/async-event.c:335 0x1066fce4 gdb_do_one_event() ../../src/binutils-gdb/gdbsupport/event-loop.cc:214 0x10001a94 start_event_loop() ../../src/binutils-gdb/gdb/main.c:411 0x10001ca0 captured_command_loop() ../../src/binutils-gdb/gdb/main.c:471 0x10003d74 captured_main(void*) ../../src/binutils-gdb/gdb/main.c:1329 0x10003e48 gdb_main(captured_main_args*) ../../src/binutils-gdb/gdb/main.c:1344 0x10000744 main ../../src/binutils-gdb/gdb/gdb.c:32 --------------------- ../../src/binutils-gdb/gdb/inferior.c:304: internal-error: find_inferior_pid: Assertion `pid != 0' failed. A problem internal to GDB has been detected, further debugging may prove unreliable. Quit this debugging session? (y or n) This is due to some bit-rot in the AIX port, still relying on the entry value of inferior_ptid in the wait methods. Problem #1 is in rs6000_nat_target::wait, here: /* Ignore terminated detached child processes. */ if (!WIFSTOPPED (status) && pid != inferior_ptid.pid ()) pid = -1; At this point, waitpid has returned an "exited" status for some pid, so pid is non-zero. Since inferior_ptid is set to null_ptid on entry, the pid returned by wait is not equal to `inferior_ptid.pid ()`, so we reset pid to -1 and go to waiting again. Since there are not more children to wait for, waitpid then returns -1 so we get here: if (pid == -1) { gdb_printf (gdb_stderr, _("Child process unexpectedly missing: %s.\n"), safe_strerror (save_errno)); /* Claim it exited with unknown signal. */ ourstatus->set_signalled (GDB_SIGNAL_UNKNOWN); return inferior_ptid; } We therefore return a "signalled" status with a null_ptid (again, inferior_ptid is null_ptid). This confuses infrun, because if the target returns a "signalled" status, it should be coupled with a ptid for an inferior that exists. So, the first step is to fix the snippets above to not use inferior_ptid. In the first snippet, use find_inferior_pid to see if we know the event process. If there is no inferior with that pid, we assume it's a detached child process to we ignore the event. That should be enough to fix the problem, because it should make it so we won't go into the second snippet. But still, fix the second snippet to return an "ignore" status. This is copied from inf_ptrace_target::wait, which is where rs6000_nat_target::wait appears to be copied from in the first place. These changes, are not sufficient, as the aix_thread_target, which sits on top of rs6000_nat_target, also relies on inferior_ptid. aix_thread_target::wait, by calling pd_update, assumes that rs6000_nat_target has set inferior_ptid to the appropriate value (the ptid of the event thread), but that's not the case. pd_update returns inferior_ptid - null_ptid - and therefore aix_thread_target::wait returns null_ptid too, and we still hit the assert shown above. Fix this by changing pd_activate, pd_update, sync_threadlists and get_signaled_thread to all avoid using inferior_ptid. Instead, they accept as a parameter the pid of the process we are working on. With this patch, I am able to run the program to completion: (gdb) r Starting program: /scratch/simark/build/gdb/a.out [Inferior 1 (process 11010794) exited normally] As well as break on main: (gdb) b main Breakpoint 1 at 0x1000036c (gdb) r Starting program: /scratch/simark/build/gdb/a.out Breakpoint 1, 0x1000036c in main () (gdb) c Continuing. [Inferior 1 (process 26083688) exited normally] Change-Id: I7c2613bbefe487d75fa1a0c0994423471d961ee9
1858 lines
53 KiB
C
1858 lines
53 KiB
C
/* Low level interface for debugging AIX 4.3+ pthreads.
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Copyright (C) 1999-2022 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 "defs.h"
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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 "gdbcmd.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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#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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/* Return whether to treat PID as a debuggable thread id. */
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#define PD_TID(ptid) (pd_active && ptid.tid () != 0)
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/* pthdb_user_t value that we pass to pthdb functions. 0 causes
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PTHDB_BAD_USER errors, so use 1. */
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#define PD_USER 1
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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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pthdb_tid_t tid; /* kernel thread 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 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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};
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static aix_thread_target aix_thread_ops;
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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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static CORE_ADDR pd_brk_addr;
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/* Whether the current application is debuggable by pthdb. */
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static int pd_able = 0;
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/* Whether a threaded application is being debugged. */
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static int pd_active = 0;
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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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static int arch64;
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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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/* Current pthdb session. */
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static pthdb_session_t pd_session;
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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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}
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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 (PD_TID (ptid))
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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, 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 = %ld, symbols = 0x%lx, count = %d)\n",
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user, (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,
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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];
|
|
struct ptxsprs sprs64;
|
|
struct ptsprs sprs32;
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n",
|
|
(int) tid, 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, (uintptr_t) 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, (uintptr_t) 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, (uintptr_t) &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)
|
|
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 (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 (arch64)
|
|
{
|
|
ptrace64aix (PTT_WRITE_SPRS, tid,
|
|
(unsigned long) &context->msr, 0, NULL);
|
|
}
|
|
else
|
|
{
|
|
ptrace32 (PTT_WRITE_SPRS, tid, (uintptr_t) &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)
|
|
gdb_printf (gdb_stdlog,
|
|
"pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
|
|
user, (long) buf, hex_string (addr), len);
|
|
|
|
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, void *buf,
|
|
pthdb_addr_t addr, size_t len)
|
|
{
|
|
int status, ret;
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
|
|
user, (long) buf, hex_string (addr), len);
|
|
|
|
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, size_t len, void **bufp)
|
|
{
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n",
|
|
user, 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, void *buf, size_t len, void **bufp)
|
|
{
|
|
if (debug_aix_thread)
|
|
gdb_printf (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)
|
|
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, void *buf)
|
|
{
|
|
if (debug_aix_thread)
|
|
gdb_printf (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:
|
|
/* 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");
|
|
}
|
|
}
|
|
|
|
/* 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.
|
|
|
|
Do not count the main thread (whose tid is zero). This matches
|
|
the list of threads provided by the pthreaddebug library, which
|
|
does not include that main thread either, and thus allows us
|
|
to compare the two lists. */
|
|
|
|
static int
|
|
giter_count (struct thread_info *thread, void *countp)
|
|
{
|
|
if (PD_TID (thread->ptid))
|
|
(*(int *) countp)++;
|
|
return 0;
|
|
}
|
|
|
|
/* iterate_over_threads() callback for accumulating GDB thread pids.
|
|
|
|
Do not include the main thread (whose tid is zero). This matches
|
|
the list of threads provided by the pthreaddebug library, which
|
|
does not include that main thread either, and thus allows us
|
|
to compare the two lists. */
|
|
|
|
static int
|
|
giter_accum (struct thread_info *thread, void *bufp)
|
|
{
|
|
if (PD_TID (thread->ptid))
|
|
{
|
|
**(struct thread_info ***) bufp = thread;
|
|
(*(struct thread_info ***) bufp)++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* ptid comparison function */
|
|
|
|
static int
|
|
ptid_cmp (ptid_t ptid1, ptid_t ptid2)
|
|
{
|
|
if (ptid1.pid () < ptid2.pid ())
|
|
return -1;
|
|
else if (ptid1.pid () > ptid2.pid ())
|
|
return 1;
|
|
else if (ptid1.tid () < ptid2.tid ())
|
|
return -1;
|
|
else if (ptid1.tid () > ptid2.tid ())
|
|
return 1;
|
|
else if (ptid1.lwp () < ptid2.lwp ())
|
|
return -1;
|
|
else if (ptid1.lwp () > ptid2.lwp ())
|
|
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);
|
|
}
|
|
|
|
/* 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;
|
|
|
|
if (thrinf.ti_cursig == SIGTRAP)
|
|
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 (int pid)
|
|
{
|
|
int cmd, status;
|
|
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 = XNEWVEC (struct pd_thread, psize);
|
|
|
|
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 = XNEWVEC (struct thread_info *, gcount);
|
|
iterate_over_threads (giter_accum, &g);
|
|
qsort (gbuf, gcount, sizeof *gbuf, gcmp);
|
|
|
|
/* Apply differences between the two arrays to GDB's thread list. */
|
|
for (pi = gi = 0; pi < pcount || gi < gcount;)
|
|
{
|
|
if (pi == pcount)
|
|
{
|
|
delete_thread (gbuf[gi]);
|
|
gi++;
|
|
}
|
|
else if (gi == gcount)
|
|
{
|
|
aix_thread_info *priv = new aix_thread_info;
|
|
priv->pdtid = pbuf[pi].pdtid;
|
|
priv->tid = pbuf[pi].tid;
|
|
|
|
process_stratum_target *proc_target
|
|
= current_inferior ()->process_target ();
|
|
thread = add_thread_with_info (proc_target,
|
|
ptid_t (pid, 0, pbuf[pi].pthid),
|
|
priv);
|
|
|
|
pi++;
|
|
}
|
|
else
|
|
{
|
|
ptid_t pptid, gptid;
|
|
int cmp_result;
|
|
|
|
pptid = ptid_t (pid, 0, pbuf[pi].pthid);
|
|
gptid = gbuf[gi]->ptid;
|
|
pdtid = pbuf[pi].pdtid;
|
|
tid = pbuf[pi].tid;
|
|
|
|
cmp_result = ptid_cmp (pptid, gptid);
|
|
|
|
if (cmp_result == 0)
|
|
{
|
|
aix_thread_info *priv = get_aix_thread_info (gbuf[gi]);
|
|
|
|
priv->pdtid = pdtid;
|
|
priv->tid = tid;
|
|
pi++;
|
|
gi++;
|
|
}
|
|
else if (cmp_result > 0)
|
|
{
|
|
delete_thread (gbuf[gi]);
|
|
gi++;
|
|
}
|
|
else
|
|
{
|
|
process_stratum_target *proc_target
|
|
= current_inferior ()->process_target ();
|
|
thread = add_thread (proc_target, pptid);
|
|
|
|
aix_thread_info *priv = new aix_thread_info;
|
|
thread->priv.reset (priv);
|
|
priv->pdtid = pdtid;
|
|
priv->tid = tid;
|
|
pi++;
|
|
}
|
|
}
|
|
}
|
|
|
|
xfree (pbuf);
|
|
xfree (gbuf);
|
|
}
|
|
|
|
/* 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;
|
|
aix_thread_info *priv = get_aix_thread_info (thread);
|
|
|
|
return priv->tid == 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 (int pid)
|
|
{
|
|
int status;
|
|
ptid_t ptid;
|
|
pthdb_tid_t tid;
|
|
struct thread_info *thread = NULL;
|
|
|
|
if (!pd_active)
|
|
return ptid_t (pid);
|
|
|
|
status = pthdb_session_update (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, return a ptid
|
|
for that thread. Otherwise, return a ptid-only ptid using PID. */
|
|
|
|
static ptid_t
|
|
pd_activate (int pid)
|
|
{
|
|
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 ptid_t (pid);
|
|
}
|
|
pd_active = 1;
|
|
return pd_update (pid);
|
|
}
|
|
|
|
/* 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 bound_minimal_symbol ms;
|
|
|
|
/* Don't initialize twice. */
|
|
if (pd_able)
|
|
return;
|
|
|
|
/* Check application word size. */
|
|
arch64 = register_size (target_gdbarch (), 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. */
|
|
ms = lookup_minimal_symbol (stub_name, NULL, NULL);
|
|
if (ms.minsym == NULL)
|
|
return;
|
|
pd_brk_addr = ms.value_address ();
|
|
if (!create_thread_event_breakpoint (target_gdbarch (), pd_brk_addr))
|
|
return;
|
|
|
|
/* Prepare for thread debugging. */
|
|
current_inferior ()->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;
|
|
current_inferior ()->unpush_target (&aix_thread_ops);
|
|
}
|
|
|
|
/* new_objfile observer 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 ();
|
|
}
|
|
|
|
/* Attach to process specified by ARGS. */
|
|
|
|
static void
|
|
aix_thread_inferior_created (inferior *inf)
|
|
{
|
|
pd_enable ();
|
|
}
|
|
|
|
/* 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 ();
|
|
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];
|
|
|
|
if (!PD_TID (ptid))
|
|
{
|
|
scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
|
|
|
|
inferior_ptid = ptid_t (inferior_ptid.pid ());
|
|
beneath ()->resume (ptid, step, sig);
|
|
}
|
|
else
|
|
{
|
|
thread = find_thread_ptid (current_inferior (), ptid);
|
|
if (!thread)
|
|
error (_("aix-thread resume: unknown pthread %ld"),
|
|
ptid.lwp ());
|
|
|
|
aix_thread_info *priv = get_aix_thread_info (thread);
|
|
|
|
tid[0] = priv->tid;
|
|
if (tid[0] == PTHDB_INVALID_TID)
|
|
error (_("aix-thread resume: no tid for pthread %ld"),
|
|
ptid.lwp ());
|
|
tid[1] = 0;
|
|
|
|
if (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)
|
|
{
|
|
{
|
|
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 ());
|
|
|
|
/* Check whether libpthdebug might be ready to be initialized. */
|
|
if (!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) == pd_brk_addr)
|
|
return pd_activate (ptid.pid ());
|
|
}
|
|
|
|
return pd_update (ptid.pid ());
|
|
}
|
|
|
|
/* Record that the 64-bit general-purpose registers contain VALS. */
|
|
|
|
static void
|
|
supply_gprs64 (struct regcache *regcache, uint64_t *vals)
|
|
{
|
|
ppc_gdbarch_tdep *tdep
|
|
= (ppc_gdbarch_tdep *) 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 = (ppc_gdbarch_tdep *) 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 = (ppc_gdbarch_tdep *) 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 = (ppc_gdbarch_tdep *) 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 = (ppc_gdbarch_tdep *) 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 = (ppc_gdbarch_tdep *) gdbarch_tdep (gdbarch);
|
|
int status, i;
|
|
pthdb_context_t ctx;
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (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 (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 (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);
|
|
}
|
|
|
|
/* 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 = (ppc_gdbarch_tdep *) 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;
|
|
|
|
if (debug_aix_thread)
|
|
gdb_printf (gdb_stdlog,
|
|
"fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n",
|
|
(long) tid, regno, arch64);
|
|
|
|
/* General-purpose registers. */
|
|
if (regno == -1
|
|
|| (tdep->ppc_gp0_regnum <= regno
|
|
&& regno < tdep->ppc_gp0_regnum + ppc_num_gprs))
|
|
{
|
|
if (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]);
|
|
}
|
|
}
|
|
|
|
/* 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 (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 (!PD_TID (regcache->ptid ()))
|
|
beneath ()->fetch_registers (regcache, regno);
|
|
else
|
|
{
|
|
thread = find_thread_ptid (current_inferior (), regcache->ptid ());
|
|
aix_thread_info *priv = get_aix_thread_info (thread);
|
|
tid = priv->tid;
|
|
|
|
if (tid == PTHDB_INVALID_TID)
|
|
fetch_regs_user_thread (regcache, priv->pdtid);
|
|
else
|
|
fetch_regs_kernel_thread (regcache, regno, tid);
|
|
}
|
|
}
|
|
|
|
/* 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
|
|
= (ppc_gdbarch_tdep *) 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
|
|
= (ppc_gdbarch_tdep *) 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 = (ppc_gdbarch_tdep *) 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 = (ppc_gdbarch_tdep *) 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 = (ppc_gdbarch_tdep *) 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 = (ppc_gdbarch_tdep *) gdbarch_tdep (gdbarch);
|
|
int status, i;
|
|
pthdb_context_t ctx;
|
|
uint32_t int32;
|
|
uint64_t int64;
|
|
|
|
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 (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 < ppc_num_gprs; i++)
|
|
if (REG_VALID == regcache->get_register_status (tdep->ppc_gp0_regnum + i))
|
|
{
|
|
if (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 (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 (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 = (ppc_gdbarch_tdep *) 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;
|
|
|
|
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 (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 (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);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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 (!PD_TID (regcache->ptid ()))
|
|
beneath ()->store_registers (regcache, regno);
|
|
else
|
|
{
|
|
thread = find_thread_ptid (current_inferior (), regcache->ptid ());
|
|
aix_thread_info *priv = get_aix_thread_info (thread);
|
|
tid = priv->tid;
|
|
|
|
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_deactivate ();
|
|
beneath->mourn_inferior ();
|
|
}
|
|
|
|
/* Return whether thread PID is still valid. */
|
|
|
|
bool
|
|
aix_thread_target::thread_alive (ptid_t ptid)
|
|
{
|
|
if (!PD_TID (ptid))
|
|
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)
|
|
{
|
|
if (!PD_TID (ptid))
|
|
return beneath ()->pid_to_str (ptid);
|
|
|
|
return string_printf (_("Thread %s"), pulongest (ptid.tid ()));
|
|
}
|
|
|
|
/* 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_tid_t tid;
|
|
pthdb_state_t state;
|
|
pthdb_suspendstate_t suspendstate;
|
|
pthdb_detachstate_t detachstate;
|
|
int cancelpend;
|
|
static char *ret = NULL;
|
|
|
|
if (!PD_TID (thread->ptid))
|
|
return NULL;
|
|
|
|
string_file buf;
|
|
aix_thread_info *priv = get_aix_thread_info (thread);
|
|
|
|
pdtid = priv->pdtid;
|
|
tid = priv->tid;
|
|
|
|
if (tid != PTHDB_INVALID_TID)
|
|
/* i18n: Like "thread-identifier %d, [state] running, suspended" */
|
|
buf.printf (_("tid %d"), (int)tid);
|
|
|
|
status = pthdb_pthread_state (pd_session, pdtid, &state);
|
|
if (status != PTHDB_SUCCESS)
|
|
state = PST_NOTSUP;
|
|
buf.printf (", %s", state2str (state));
|
|
|
|
status = pthdb_pthread_suspendstate (pd_session, pdtid,
|
|
&suspendstate);
|
|
if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED)
|
|
/* i18n: Like "Thread-Id %d, [state] running, suspended" */
|
|
buf.printf (_(", suspended"));
|
|
|
|
status = pthdb_pthread_detachstate (pd_session, pdtid,
|
|
&detachstate);
|
|
if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED)
|
|
/* i18n: Like "Thread-Id %d, [state] running, detached" */
|
|
buf.printf (_(", detached"));
|
|
|
|
pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend);
|
|
if (status == PTHDB_SUCCESS && cancelpend)
|
|
/* i18n: Like "Thread-Id %d, [state] running, cancel pending" */
|
|
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);
|
|
}
|