d2939ba2b4
In all-stop mode, record btrace maintains the old behaviour of an implicit scheduler-locking on. Now that we added a scheduler-locking mode to model this old behaviour, we don't need the respective code in record btrace anymore. Remove it. For all-stop targets, step inferior_ptid and continue other threads matching the argument ptid. Assert that inferior_ptid matches the argument ptid. This should make record btrace honour scheduler-locking. gdb/ * record-btrace.c (record_btrace_resume): Honour scheduler-locking. testsuite/ * gdb.btrace/multi-thread-step.exp: Test scheduler-locking on, step, and replay.
2968 lines
75 KiB
C
2968 lines
75 KiB
C
/* Branch trace support for GDB, the GNU debugger.
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Copyright (C) 2013-2015 Free Software Foundation, Inc.
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Contributed by Intel Corp. <markus.t.metzger@intel.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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#include "defs.h"
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#include "record.h"
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#include "gdbthread.h"
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#include "target.h"
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#include "gdbcmd.h"
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#include "disasm.h"
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#include "observer.h"
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#include "cli/cli-utils.h"
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#include "source.h"
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#include "ui-out.h"
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#include "symtab.h"
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#include "filenames.h"
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#include "regcache.h"
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#include "frame-unwind.h"
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#include "hashtab.h"
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#include "infrun.h"
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#include "event-loop.h"
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#include "inf-loop.h"
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#include "vec.h"
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/* The target_ops of record-btrace. */
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static struct target_ops record_btrace_ops;
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/* A new thread observer enabling branch tracing for the new thread. */
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static struct observer *record_btrace_thread_observer;
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/* Memory access types used in set/show record btrace replay-memory-access. */
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static const char replay_memory_access_read_only[] = "read-only";
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static const char replay_memory_access_read_write[] = "read-write";
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static const char *const replay_memory_access_types[] =
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{
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replay_memory_access_read_only,
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replay_memory_access_read_write,
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NULL
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};
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/* The currently allowed replay memory access type. */
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static const char *replay_memory_access = replay_memory_access_read_only;
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/* Command lists for "set/show record btrace". */
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static struct cmd_list_element *set_record_btrace_cmdlist;
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static struct cmd_list_element *show_record_btrace_cmdlist;
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/* The execution direction of the last resume we got. See record-full.c. */
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static enum exec_direction_kind record_btrace_resume_exec_dir = EXEC_FORWARD;
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/* The async event handler for reverse/replay execution. */
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static struct async_event_handler *record_btrace_async_inferior_event_handler;
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/* A flag indicating that we are currently generating a core file. */
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static int record_btrace_generating_corefile;
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/* The current branch trace configuration. */
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static struct btrace_config record_btrace_conf;
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/* Command list for "record btrace". */
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static struct cmd_list_element *record_btrace_cmdlist;
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/* Command lists for "set/show record btrace bts". */
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static struct cmd_list_element *set_record_btrace_bts_cmdlist;
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static struct cmd_list_element *show_record_btrace_bts_cmdlist;
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/* Command lists for "set/show record btrace pt". */
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static struct cmd_list_element *set_record_btrace_pt_cmdlist;
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static struct cmd_list_element *show_record_btrace_pt_cmdlist;
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/* Print a record-btrace debug message. Use do ... while (0) to avoid
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ambiguities when used in if statements. */
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#define DEBUG(msg, args...) \
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do \
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{ \
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if (record_debug != 0) \
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fprintf_unfiltered (gdb_stdlog, \
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"[record-btrace] " msg "\n", ##args); \
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} \
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while (0)
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/* Update the branch trace for the current thread and return a pointer to its
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thread_info.
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Throws an error if there is no thread or no trace. This function never
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returns NULL. */
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static struct thread_info *
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require_btrace_thread (void)
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{
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struct thread_info *tp;
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DEBUG ("require");
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tp = find_thread_ptid (inferior_ptid);
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if (tp == NULL)
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error (_("No thread."));
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btrace_fetch (tp);
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if (btrace_is_empty (tp))
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error (_("No trace."));
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return tp;
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}
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/* Update the branch trace for the current thread and return a pointer to its
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branch trace information struct.
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Throws an error if there is no thread or no trace. This function never
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returns NULL. */
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static struct btrace_thread_info *
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require_btrace (void)
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{
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struct thread_info *tp;
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tp = require_btrace_thread ();
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return &tp->btrace;
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}
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/* Enable branch tracing for one thread. Warn on errors. */
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static void
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record_btrace_enable_warn (struct thread_info *tp)
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{
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TRY
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{
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btrace_enable (tp, &record_btrace_conf);
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}
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CATCH (error, RETURN_MASK_ERROR)
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{
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warning ("%s", error.message);
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}
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END_CATCH
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}
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/* Callback function to disable branch tracing for one thread. */
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static void
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record_btrace_disable_callback (void *arg)
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{
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struct thread_info *tp;
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tp = arg;
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btrace_disable (tp);
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}
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/* Enable automatic tracing of new threads. */
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static void
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record_btrace_auto_enable (void)
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{
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DEBUG ("attach thread observer");
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record_btrace_thread_observer
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= observer_attach_new_thread (record_btrace_enable_warn);
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}
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/* Disable automatic tracing of new threads. */
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static void
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record_btrace_auto_disable (void)
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{
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/* The observer may have been detached, already. */
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if (record_btrace_thread_observer == NULL)
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return;
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DEBUG ("detach thread observer");
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observer_detach_new_thread (record_btrace_thread_observer);
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record_btrace_thread_observer = NULL;
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}
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/* The record-btrace async event handler function. */
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static void
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record_btrace_handle_async_inferior_event (gdb_client_data data)
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{
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inferior_event_handler (INF_REG_EVENT, NULL);
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}
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/* The to_open method of target record-btrace. */
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static void
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record_btrace_open (const char *args, int from_tty)
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{
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struct cleanup *disable_chain;
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struct thread_info *tp;
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DEBUG ("open");
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record_preopen ();
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if (!target_has_execution)
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error (_("The program is not being run."));
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gdb_assert (record_btrace_thread_observer == NULL);
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disable_chain = make_cleanup (null_cleanup, NULL);
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ALL_NON_EXITED_THREADS (tp)
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if (args == NULL || *args == 0 || number_is_in_list (args, tp->num))
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{
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btrace_enable (tp, &record_btrace_conf);
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make_cleanup (record_btrace_disable_callback, tp);
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}
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record_btrace_auto_enable ();
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push_target (&record_btrace_ops);
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record_btrace_async_inferior_event_handler
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= create_async_event_handler (record_btrace_handle_async_inferior_event,
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NULL);
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record_btrace_generating_corefile = 0;
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observer_notify_record_changed (current_inferior (), 1);
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discard_cleanups (disable_chain);
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}
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/* The to_stop_recording method of target record-btrace. */
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static void
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record_btrace_stop_recording (struct target_ops *self)
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{
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struct thread_info *tp;
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DEBUG ("stop recording");
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record_btrace_auto_disable ();
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ALL_NON_EXITED_THREADS (tp)
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if (tp->btrace.target != NULL)
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btrace_disable (tp);
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}
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/* The to_close method of target record-btrace. */
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static void
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record_btrace_close (struct target_ops *self)
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{
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struct thread_info *tp;
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if (record_btrace_async_inferior_event_handler != NULL)
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delete_async_event_handler (&record_btrace_async_inferior_event_handler);
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/* Make sure automatic recording gets disabled even if we did not stop
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recording before closing the record-btrace target. */
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record_btrace_auto_disable ();
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/* We should have already stopped recording.
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Tear down btrace in case we have not. */
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ALL_NON_EXITED_THREADS (tp)
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btrace_teardown (tp);
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}
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/* The to_async method of target record-btrace. */
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static void
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record_btrace_async (struct target_ops *ops, int enable)
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{
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if (enable)
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mark_async_event_handler (record_btrace_async_inferior_event_handler);
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else
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clear_async_event_handler (record_btrace_async_inferior_event_handler);
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ops->beneath->to_async (ops->beneath, enable);
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}
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/* Adjusts the size and returns a human readable size suffix. */
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static const char *
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record_btrace_adjust_size (unsigned int *size)
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{
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unsigned int sz;
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sz = *size;
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if ((sz & ((1u << 30) - 1)) == 0)
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{
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*size = sz >> 30;
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return "GB";
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}
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else if ((sz & ((1u << 20) - 1)) == 0)
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{
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*size = sz >> 20;
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return "MB";
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}
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else if ((sz & ((1u << 10) - 1)) == 0)
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{
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*size = sz >> 10;
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return "kB";
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}
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else
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return "";
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}
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/* Print a BTS configuration. */
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static void
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record_btrace_print_bts_conf (const struct btrace_config_bts *conf)
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{
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const char *suffix;
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unsigned int size;
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size = conf->size;
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if (size > 0)
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{
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suffix = record_btrace_adjust_size (&size);
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printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix);
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}
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}
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/* Print an Intel(R) Processor Trace configuration. */
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static void
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record_btrace_print_pt_conf (const struct btrace_config_pt *conf)
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{
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const char *suffix;
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unsigned int size;
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size = conf->size;
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if (size > 0)
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{
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suffix = record_btrace_adjust_size (&size);
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printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix);
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}
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}
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/* Print a branch tracing configuration. */
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static void
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record_btrace_print_conf (const struct btrace_config *conf)
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{
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printf_unfiltered (_("Recording format: %s.\n"),
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btrace_format_string (conf->format));
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switch (conf->format)
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{
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case BTRACE_FORMAT_NONE:
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return;
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case BTRACE_FORMAT_BTS:
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record_btrace_print_bts_conf (&conf->bts);
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return;
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case BTRACE_FORMAT_PT:
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record_btrace_print_pt_conf (&conf->pt);
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return;
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}
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internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
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}
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/* The to_info_record method of target record-btrace. */
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static void
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record_btrace_info (struct target_ops *self)
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{
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struct btrace_thread_info *btinfo;
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const struct btrace_config *conf;
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struct thread_info *tp;
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unsigned int insns, calls, gaps;
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DEBUG ("info");
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tp = find_thread_ptid (inferior_ptid);
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if (tp == NULL)
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error (_("No thread."));
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btinfo = &tp->btrace;
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conf = btrace_conf (btinfo);
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if (conf != NULL)
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record_btrace_print_conf (conf);
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btrace_fetch (tp);
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insns = 0;
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calls = 0;
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gaps = 0;
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if (!btrace_is_empty (tp))
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{
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struct btrace_call_iterator call;
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struct btrace_insn_iterator insn;
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btrace_call_end (&call, btinfo);
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btrace_call_prev (&call, 1);
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calls = btrace_call_number (&call);
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btrace_insn_end (&insn, btinfo);
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insns = btrace_insn_number (&insn);
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if (insns != 0)
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{
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/* The last instruction does not really belong to the trace. */
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insns -= 1;
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}
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else
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{
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unsigned int steps;
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/* Skip gaps at the end. */
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do
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{
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steps = btrace_insn_prev (&insn, 1);
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if (steps == 0)
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break;
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insns = btrace_insn_number (&insn);
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}
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while (insns == 0);
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}
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gaps = btinfo->ngaps;
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}
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printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) "
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"for thread %d (%s).\n"), insns, calls, gaps,
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tp->num, target_pid_to_str (tp->ptid));
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if (btrace_is_replaying (tp))
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printf_unfiltered (_("Replay in progress. At instruction %u.\n"),
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btrace_insn_number (btinfo->replay));
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}
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/* Print a decode error. */
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static void
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btrace_ui_out_decode_error (struct ui_out *uiout, int errcode,
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enum btrace_format format)
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{
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const char *errstr;
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int is_error;
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errstr = _("unknown");
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is_error = 1;
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switch (format)
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{
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default:
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break;
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case BTRACE_FORMAT_BTS:
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switch (errcode)
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{
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default:
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break;
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case BDE_BTS_OVERFLOW:
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errstr = _("instruction overflow");
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break;
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case BDE_BTS_INSN_SIZE:
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errstr = _("unknown instruction");
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break;
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}
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break;
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#if defined (HAVE_LIBIPT)
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case BTRACE_FORMAT_PT:
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switch (errcode)
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{
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case BDE_PT_USER_QUIT:
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is_error = 0;
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errstr = _("trace decode cancelled");
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break;
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case BDE_PT_DISABLED:
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is_error = 0;
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errstr = _("disabled");
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break;
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case BDE_PT_OVERFLOW:
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is_error = 0;
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errstr = _("overflow");
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break;
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default:
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if (errcode < 0)
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errstr = pt_errstr (pt_errcode (errcode));
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break;
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}
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break;
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#endif /* defined (HAVE_LIBIPT) */
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}
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ui_out_text (uiout, _("["));
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if (is_error)
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{
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ui_out_text (uiout, _("decode error ("));
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ui_out_field_int (uiout, "errcode", errcode);
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ui_out_text (uiout, _("): "));
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}
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ui_out_text (uiout, errstr);
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ui_out_text (uiout, _("]\n"));
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}
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/* Print an unsigned int. */
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static void
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ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val)
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{
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ui_out_field_fmt (uiout, fld, "%u", val);
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}
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/* Disassemble a section of the recorded instruction trace. */
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static void
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btrace_insn_history (struct ui_out *uiout,
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const struct btrace_thread_info *btinfo,
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const struct btrace_insn_iterator *begin,
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const struct btrace_insn_iterator *end, int flags)
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{
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struct gdbarch *gdbarch;
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struct btrace_insn_iterator it;
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DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin),
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btrace_insn_number (end));
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gdbarch = target_gdbarch ();
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for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1))
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{
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const struct btrace_insn *insn;
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insn = btrace_insn_get (&it);
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/* A NULL instruction indicates a gap in the trace. */
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if (insn == NULL)
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{
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const struct btrace_config *conf;
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conf = btrace_conf (btinfo);
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/* We have trace so we must have a configuration. */
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gdb_assert (conf != NULL);
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btrace_ui_out_decode_error (uiout, it.function->errcode,
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conf->format);
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}
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else
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{
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char prefix[4];
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|
|
/* We may add a speculation prefix later. We use the same space
|
|
that is used for the pc prefix. */
|
|
if ((flags & DISASSEMBLY_OMIT_PC) == 0)
|
|
strncpy (prefix, pc_prefix (insn->pc), 3);
|
|
else
|
|
{
|
|
prefix[0] = ' ';
|
|
prefix[1] = ' ';
|
|
prefix[2] = ' ';
|
|
}
|
|
prefix[3] = 0;
|
|
|
|
/* Print the instruction index. */
|
|
ui_out_field_uint (uiout, "index", btrace_insn_number (&it));
|
|
ui_out_text (uiout, "\t");
|
|
|
|
/* Indicate speculative execution by a leading '?'. */
|
|
if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0)
|
|
prefix[0] = '?';
|
|
|
|
/* Print the prefix; we tell gdb_disassembly below to omit it. */
|
|
ui_out_field_fmt (uiout, "prefix", "%s", prefix);
|
|
|
|
/* Disassembly with '/m' flag may not produce the expected result.
|
|
See PR gdb/11833. */
|
|
gdb_disassembly (gdbarch, uiout, NULL, flags | DISASSEMBLY_OMIT_PC,
|
|
1, insn->pc, insn->pc + 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* The to_insn_history method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_insn_history (struct target_ops *self, int size, int flags)
|
|
{
|
|
struct btrace_thread_info *btinfo;
|
|
struct btrace_insn_history *history;
|
|
struct btrace_insn_iterator begin, end;
|
|
struct cleanup *uiout_cleanup;
|
|
struct ui_out *uiout;
|
|
unsigned int context, covered;
|
|
|
|
uiout = current_uiout;
|
|
uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout,
|
|
"insn history");
|
|
context = abs (size);
|
|
if (context == 0)
|
|
error (_("Bad record instruction-history-size."));
|
|
|
|
btinfo = require_btrace ();
|
|
history = btinfo->insn_history;
|
|
if (history == NULL)
|
|
{
|
|
struct btrace_insn_iterator *replay;
|
|
|
|
DEBUG ("insn-history (0x%x): %d", flags, size);
|
|
|
|
/* If we're replaying, we start at the replay position. Otherwise, we
|
|
start at the tail of the trace. */
|
|
replay = btinfo->replay;
|
|
if (replay != NULL)
|
|
begin = *replay;
|
|
else
|
|
btrace_insn_end (&begin, btinfo);
|
|
|
|
/* We start from here and expand in the requested direction. Then we
|
|
expand in the other direction, as well, to fill up any remaining
|
|
context. */
|
|
end = begin;
|
|
if (size < 0)
|
|
{
|
|
/* We want the current position covered, as well. */
|
|
covered = btrace_insn_next (&end, 1);
|
|
covered += btrace_insn_prev (&begin, context - covered);
|
|
covered += btrace_insn_next (&end, context - covered);
|
|
}
|
|
else
|
|
{
|
|
covered = btrace_insn_next (&end, context);
|
|
covered += btrace_insn_prev (&begin, context - covered);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
begin = history->begin;
|
|
end = history->end;
|
|
|
|
DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size,
|
|
btrace_insn_number (&begin), btrace_insn_number (&end));
|
|
|
|
if (size < 0)
|
|
{
|
|
end = begin;
|
|
covered = btrace_insn_prev (&begin, context);
|
|
}
|
|
else
|
|
{
|
|
begin = end;
|
|
covered = btrace_insn_next (&end, context);
|
|
}
|
|
}
|
|
|
|
if (covered > 0)
|
|
btrace_insn_history (uiout, btinfo, &begin, &end, flags);
|
|
else
|
|
{
|
|
if (size < 0)
|
|
printf_unfiltered (_("At the start of the branch trace record.\n"));
|
|
else
|
|
printf_unfiltered (_("At the end of the branch trace record.\n"));
|
|
}
|
|
|
|
btrace_set_insn_history (btinfo, &begin, &end);
|
|
do_cleanups (uiout_cleanup);
|
|
}
|
|
|
|
/* The to_insn_history_range method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_insn_history_range (struct target_ops *self,
|
|
ULONGEST from, ULONGEST to, int flags)
|
|
{
|
|
struct btrace_thread_info *btinfo;
|
|
struct btrace_insn_history *history;
|
|
struct btrace_insn_iterator begin, end;
|
|
struct cleanup *uiout_cleanup;
|
|
struct ui_out *uiout;
|
|
unsigned int low, high;
|
|
int found;
|
|
|
|
uiout = current_uiout;
|
|
uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout,
|
|
"insn history");
|
|
low = from;
|
|
high = to;
|
|
|
|
DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high);
|
|
|
|
/* Check for wrap-arounds. */
|
|
if (low != from || high != to)
|
|
error (_("Bad range."));
|
|
|
|
if (high < low)
|
|
error (_("Bad range."));
|
|
|
|
btinfo = require_btrace ();
|
|
|
|
found = btrace_find_insn_by_number (&begin, btinfo, low);
|
|
if (found == 0)
|
|
error (_("Range out of bounds."));
|
|
|
|
found = btrace_find_insn_by_number (&end, btinfo, high);
|
|
if (found == 0)
|
|
{
|
|
/* Silently truncate the range. */
|
|
btrace_insn_end (&end, btinfo);
|
|
}
|
|
else
|
|
{
|
|
/* We want both begin and end to be inclusive. */
|
|
btrace_insn_next (&end, 1);
|
|
}
|
|
|
|
btrace_insn_history (uiout, btinfo, &begin, &end, flags);
|
|
btrace_set_insn_history (btinfo, &begin, &end);
|
|
|
|
do_cleanups (uiout_cleanup);
|
|
}
|
|
|
|
/* The to_insn_history_from method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_insn_history_from (struct target_ops *self,
|
|
ULONGEST from, int size, int flags)
|
|
{
|
|
ULONGEST begin, end, context;
|
|
|
|
context = abs (size);
|
|
if (context == 0)
|
|
error (_("Bad record instruction-history-size."));
|
|
|
|
if (size < 0)
|
|
{
|
|
end = from;
|
|
|
|
if (from < context)
|
|
begin = 0;
|
|
else
|
|
begin = from - context + 1;
|
|
}
|
|
else
|
|
{
|
|
begin = from;
|
|
end = from + context - 1;
|
|
|
|
/* Check for wrap-around. */
|
|
if (end < begin)
|
|
end = ULONGEST_MAX;
|
|
}
|
|
|
|
record_btrace_insn_history_range (self, begin, end, flags);
|
|
}
|
|
|
|
/* Print the instruction number range for a function call history line. */
|
|
|
|
static void
|
|
btrace_call_history_insn_range (struct ui_out *uiout,
|
|
const struct btrace_function *bfun)
|
|
{
|
|
unsigned int begin, end, size;
|
|
|
|
size = VEC_length (btrace_insn_s, bfun->insn);
|
|
gdb_assert (size > 0);
|
|
|
|
begin = bfun->insn_offset;
|
|
end = begin + size - 1;
|
|
|
|
ui_out_field_uint (uiout, "insn begin", begin);
|
|
ui_out_text (uiout, ",");
|
|
ui_out_field_uint (uiout, "insn end", end);
|
|
}
|
|
|
|
/* Compute the lowest and highest source line for the instructions in BFUN
|
|
and return them in PBEGIN and PEND.
|
|
Ignore instructions that can't be mapped to BFUN, e.g. instructions that
|
|
result from inlining or macro expansion. */
|
|
|
|
static void
|
|
btrace_compute_src_line_range (const struct btrace_function *bfun,
|
|
int *pbegin, int *pend)
|
|
{
|
|
struct btrace_insn *insn;
|
|
struct symtab *symtab;
|
|
struct symbol *sym;
|
|
unsigned int idx;
|
|
int begin, end;
|
|
|
|
begin = INT_MAX;
|
|
end = INT_MIN;
|
|
|
|
sym = bfun->sym;
|
|
if (sym == NULL)
|
|
goto out;
|
|
|
|
symtab = symbol_symtab (sym);
|
|
|
|
for (idx = 0; VEC_iterate (btrace_insn_s, bfun->insn, idx, insn); ++idx)
|
|
{
|
|
struct symtab_and_line sal;
|
|
|
|
sal = find_pc_line (insn->pc, 0);
|
|
if (sal.symtab != symtab || sal.line == 0)
|
|
continue;
|
|
|
|
begin = min (begin, sal.line);
|
|
end = max (end, sal.line);
|
|
}
|
|
|
|
out:
|
|
*pbegin = begin;
|
|
*pend = end;
|
|
}
|
|
|
|
/* Print the source line information for a function call history line. */
|
|
|
|
static void
|
|
btrace_call_history_src_line (struct ui_out *uiout,
|
|
const struct btrace_function *bfun)
|
|
{
|
|
struct symbol *sym;
|
|
int begin, end;
|
|
|
|
sym = bfun->sym;
|
|
if (sym == NULL)
|
|
return;
|
|
|
|
ui_out_field_string (uiout, "file",
|
|
symtab_to_filename_for_display (symbol_symtab (sym)));
|
|
|
|
btrace_compute_src_line_range (bfun, &begin, &end);
|
|
if (end < begin)
|
|
return;
|
|
|
|
ui_out_text (uiout, ":");
|
|
ui_out_field_int (uiout, "min line", begin);
|
|
|
|
if (end == begin)
|
|
return;
|
|
|
|
ui_out_text (uiout, ",");
|
|
ui_out_field_int (uiout, "max line", end);
|
|
}
|
|
|
|
/* Get the name of a branch trace function. */
|
|
|
|
static const char *
|
|
btrace_get_bfun_name (const struct btrace_function *bfun)
|
|
{
|
|
struct minimal_symbol *msym;
|
|
struct symbol *sym;
|
|
|
|
if (bfun == NULL)
|
|
return "??";
|
|
|
|
msym = bfun->msym;
|
|
sym = bfun->sym;
|
|
|
|
if (sym != NULL)
|
|
return SYMBOL_PRINT_NAME (sym);
|
|
else if (msym != NULL)
|
|
return MSYMBOL_PRINT_NAME (msym);
|
|
else
|
|
return "??";
|
|
}
|
|
|
|
/* Disassemble a section of the recorded function trace. */
|
|
|
|
static void
|
|
btrace_call_history (struct ui_out *uiout,
|
|
const struct btrace_thread_info *btinfo,
|
|
const struct btrace_call_iterator *begin,
|
|
const struct btrace_call_iterator *end,
|
|
enum record_print_flag flags)
|
|
{
|
|
struct btrace_call_iterator it;
|
|
|
|
DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin),
|
|
btrace_call_number (end));
|
|
|
|
for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1))
|
|
{
|
|
const struct btrace_function *bfun;
|
|
struct minimal_symbol *msym;
|
|
struct symbol *sym;
|
|
|
|
bfun = btrace_call_get (&it);
|
|
sym = bfun->sym;
|
|
msym = bfun->msym;
|
|
|
|
/* Print the function index. */
|
|
ui_out_field_uint (uiout, "index", bfun->number);
|
|
ui_out_text (uiout, "\t");
|
|
|
|
/* Indicate gaps in the trace. */
|
|
if (bfun->errcode != 0)
|
|
{
|
|
const struct btrace_config *conf;
|
|
|
|
conf = btrace_conf (btinfo);
|
|
|
|
/* We have trace so we must have a configuration. */
|
|
gdb_assert (conf != NULL);
|
|
|
|
btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format);
|
|
|
|
continue;
|
|
}
|
|
|
|
if ((flags & RECORD_PRINT_INDENT_CALLS) != 0)
|
|
{
|
|
int level = bfun->level + btinfo->level, i;
|
|
|
|
for (i = 0; i < level; ++i)
|
|
ui_out_text (uiout, " ");
|
|
}
|
|
|
|
if (sym != NULL)
|
|
ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym));
|
|
else if (msym != NULL)
|
|
ui_out_field_string (uiout, "function", MSYMBOL_PRINT_NAME (msym));
|
|
else if (!ui_out_is_mi_like_p (uiout))
|
|
ui_out_field_string (uiout, "function", "??");
|
|
|
|
if ((flags & RECORD_PRINT_INSN_RANGE) != 0)
|
|
{
|
|
ui_out_text (uiout, _("\tinst "));
|
|
btrace_call_history_insn_range (uiout, bfun);
|
|
}
|
|
|
|
if ((flags & RECORD_PRINT_SRC_LINE) != 0)
|
|
{
|
|
ui_out_text (uiout, _("\tat "));
|
|
btrace_call_history_src_line (uiout, bfun);
|
|
}
|
|
|
|
ui_out_text (uiout, "\n");
|
|
}
|
|
}
|
|
|
|
/* The to_call_history method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_call_history (struct target_ops *self, int size, int flags)
|
|
{
|
|
struct btrace_thread_info *btinfo;
|
|
struct btrace_call_history *history;
|
|
struct btrace_call_iterator begin, end;
|
|
struct cleanup *uiout_cleanup;
|
|
struct ui_out *uiout;
|
|
unsigned int context, covered;
|
|
|
|
uiout = current_uiout;
|
|
uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout,
|
|
"insn history");
|
|
context = abs (size);
|
|
if (context == 0)
|
|
error (_("Bad record function-call-history-size."));
|
|
|
|
btinfo = require_btrace ();
|
|
history = btinfo->call_history;
|
|
if (history == NULL)
|
|
{
|
|
struct btrace_insn_iterator *replay;
|
|
|
|
DEBUG ("call-history (0x%x): %d", flags, size);
|
|
|
|
/* If we're replaying, we start at the replay position. Otherwise, we
|
|
start at the tail of the trace. */
|
|
replay = btinfo->replay;
|
|
if (replay != NULL)
|
|
{
|
|
begin.function = replay->function;
|
|
begin.btinfo = btinfo;
|
|
}
|
|
else
|
|
btrace_call_end (&begin, btinfo);
|
|
|
|
/* We start from here and expand in the requested direction. Then we
|
|
expand in the other direction, as well, to fill up any remaining
|
|
context. */
|
|
end = begin;
|
|
if (size < 0)
|
|
{
|
|
/* We want the current position covered, as well. */
|
|
covered = btrace_call_next (&end, 1);
|
|
covered += btrace_call_prev (&begin, context - covered);
|
|
covered += btrace_call_next (&end, context - covered);
|
|
}
|
|
else
|
|
{
|
|
covered = btrace_call_next (&end, context);
|
|
covered += btrace_call_prev (&begin, context- covered);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
begin = history->begin;
|
|
end = history->end;
|
|
|
|
DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size,
|
|
btrace_call_number (&begin), btrace_call_number (&end));
|
|
|
|
if (size < 0)
|
|
{
|
|
end = begin;
|
|
covered = btrace_call_prev (&begin, context);
|
|
}
|
|
else
|
|
{
|
|
begin = end;
|
|
covered = btrace_call_next (&end, context);
|
|
}
|
|
}
|
|
|
|
if (covered > 0)
|
|
btrace_call_history (uiout, btinfo, &begin, &end, flags);
|
|
else
|
|
{
|
|
if (size < 0)
|
|
printf_unfiltered (_("At the start of the branch trace record.\n"));
|
|
else
|
|
printf_unfiltered (_("At the end of the branch trace record.\n"));
|
|
}
|
|
|
|
btrace_set_call_history (btinfo, &begin, &end);
|
|
do_cleanups (uiout_cleanup);
|
|
}
|
|
|
|
/* The to_call_history_range method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_call_history_range (struct target_ops *self,
|
|
ULONGEST from, ULONGEST to, int flags)
|
|
{
|
|
struct btrace_thread_info *btinfo;
|
|
struct btrace_call_history *history;
|
|
struct btrace_call_iterator begin, end;
|
|
struct cleanup *uiout_cleanup;
|
|
struct ui_out *uiout;
|
|
unsigned int low, high;
|
|
int found;
|
|
|
|
uiout = current_uiout;
|
|
uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout,
|
|
"func history");
|
|
low = from;
|
|
high = to;
|
|
|
|
DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high);
|
|
|
|
/* Check for wrap-arounds. */
|
|
if (low != from || high != to)
|
|
error (_("Bad range."));
|
|
|
|
if (high < low)
|
|
error (_("Bad range."));
|
|
|
|
btinfo = require_btrace ();
|
|
|
|
found = btrace_find_call_by_number (&begin, btinfo, low);
|
|
if (found == 0)
|
|
error (_("Range out of bounds."));
|
|
|
|
found = btrace_find_call_by_number (&end, btinfo, high);
|
|
if (found == 0)
|
|
{
|
|
/* Silently truncate the range. */
|
|
btrace_call_end (&end, btinfo);
|
|
}
|
|
else
|
|
{
|
|
/* We want both begin and end to be inclusive. */
|
|
btrace_call_next (&end, 1);
|
|
}
|
|
|
|
btrace_call_history (uiout, btinfo, &begin, &end, flags);
|
|
btrace_set_call_history (btinfo, &begin, &end);
|
|
|
|
do_cleanups (uiout_cleanup);
|
|
}
|
|
|
|
/* The to_call_history_from method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_call_history_from (struct target_ops *self,
|
|
ULONGEST from, int size, int flags)
|
|
{
|
|
ULONGEST begin, end, context;
|
|
|
|
context = abs (size);
|
|
if (context == 0)
|
|
error (_("Bad record function-call-history-size."));
|
|
|
|
if (size < 0)
|
|
{
|
|
end = from;
|
|
|
|
if (from < context)
|
|
begin = 0;
|
|
else
|
|
begin = from - context + 1;
|
|
}
|
|
else
|
|
{
|
|
begin = from;
|
|
end = from + context - 1;
|
|
|
|
/* Check for wrap-around. */
|
|
if (end < begin)
|
|
end = ULONGEST_MAX;
|
|
}
|
|
|
|
record_btrace_call_history_range (self, begin, end, flags);
|
|
}
|
|
|
|
/* The to_record_is_replaying method of target record-btrace. */
|
|
|
|
static int
|
|
record_btrace_is_replaying (struct target_ops *self, ptid_t ptid)
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
ALL_NON_EXITED_THREADS (tp)
|
|
if (ptid_match (tp->ptid, ptid) && btrace_is_replaying (tp))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* The to_record_will_replay method of target record-btrace. */
|
|
|
|
static int
|
|
record_btrace_will_replay (struct target_ops *self, ptid_t ptid, int dir)
|
|
{
|
|
return dir == EXEC_REVERSE || record_btrace_is_replaying (self, ptid);
|
|
}
|
|
|
|
/* The to_xfer_partial method of target record-btrace. */
|
|
|
|
static enum target_xfer_status
|
|
record_btrace_xfer_partial (struct target_ops *ops, enum target_object object,
|
|
const char *annex, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf, ULONGEST offset,
|
|
ULONGEST len, ULONGEST *xfered_len)
|
|
{
|
|
struct target_ops *t;
|
|
|
|
/* Filter out requests that don't make sense during replay. */
|
|
if (replay_memory_access == replay_memory_access_read_only
|
|
&& !record_btrace_generating_corefile
|
|
&& record_btrace_is_replaying (ops, inferior_ptid))
|
|
{
|
|
switch (object)
|
|
{
|
|
case TARGET_OBJECT_MEMORY:
|
|
{
|
|
struct target_section *section;
|
|
|
|
/* We do not allow writing memory in general. */
|
|
if (writebuf != NULL)
|
|
{
|
|
*xfered_len = len;
|
|
return TARGET_XFER_UNAVAILABLE;
|
|
}
|
|
|
|
/* We allow reading readonly memory. */
|
|
section = target_section_by_addr (ops, offset);
|
|
if (section != NULL)
|
|
{
|
|
/* Check if the section we found is readonly. */
|
|
if ((bfd_get_section_flags (section->the_bfd_section->owner,
|
|
section->the_bfd_section)
|
|
& SEC_READONLY) != 0)
|
|
{
|
|
/* Truncate the request to fit into this section. */
|
|
len = min (len, section->endaddr - offset);
|
|
break;
|
|
}
|
|
}
|
|
|
|
*xfered_len = len;
|
|
return TARGET_XFER_UNAVAILABLE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Forward the request. */
|
|
ops = ops->beneath;
|
|
return ops->to_xfer_partial (ops, object, annex, readbuf, writebuf,
|
|
offset, len, xfered_len);
|
|
}
|
|
|
|
/* The to_insert_breakpoint method of target record-btrace. */
|
|
|
|
static int
|
|
record_btrace_insert_breakpoint (struct target_ops *ops,
|
|
struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
const char *old;
|
|
int ret;
|
|
|
|
/* Inserting breakpoints requires accessing memory. Allow it for the
|
|
duration of this function. */
|
|
old = replay_memory_access;
|
|
replay_memory_access = replay_memory_access_read_write;
|
|
|
|
ret = 0;
|
|
TRY
|
|
{
|
|
ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt);
|
|
}
|
|
CATCH (except, RETURN_MASK_ALL)
|
|
{
|
|
replay_memory_access = old;
|
|
throw_exception (except);
|
|
}
|
|
END_CATCH
|
|
replay_memory_access = old;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* The to_remove_breakpoint method of target record-btrace. */
|
|
|
|
static int
|
|
record_btrace_remove_breakpoint (struct target_ops *ops,
|
|
struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
const char *old;
|
|
int ret;
|
|
|
|
/* Removing breakpoints requires accessing memory. Allow it for the
|
|
duration of this function. */
|
|
old = replay_memory_access;
|
|
replay_memory_access = replay_memory_access_read_write;
|
|
|
|
ret = 0;
|
|
TRY
|
|
{
|
|
ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch, bp_tgt);
|
|
}
|
|
CATCH (except, RETURN_MASK_ALL)
|
|
{
|
|
replay_memory_access = old;
|
|
throw_exception (except);
|
|
}
|
|
END_CATCH
|
|
replay_memory_access = old;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* The to_fetch_registers method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_fetch_registers (struct target_ops *ops,
|
|
struct regcache *regcache, int regno)
|
|
{
|
|
struct btrace_insn_iterator *replay;
|
|
struct thread_info *tp;
|
|
|
|
tp = find_thread_ptid (inferior_ptid);
|
|
gdb_assert (tp != NULL);
|
|
|
|
replay = tp->btrace.replay;
|
|
if (replay != NULL && !record_btrace_generating_corefile)
|
|
{
|
|
const struct btrace_insn *insn;
|
|
struct gdbarch *gdbarch;
|
|
int pcreg;
|
|
|
|
gdbarch = get_regcache_arch (regcache);
|
|
pcreg = gdbarch_pc_regnum (gdbarch);
|
|
if (pcreg < 0)
|
|
return;
|
|
|
|
/* We can only provide the PC register. */
|
|
if (regno >= 0 && regno != pcreg)
|
|
return;
|
|
|
|
insn = btrace_insn_get (replay);
|
|
gdb_assert (insn != NULL);
|
|
|
|
regcache_raw_supply (regcache, regno, &insn->pc);
|
|
}
|
|
else
|
|
{
|
|
struct target_ops *t = ops->beneath;
|
|
|
|
t->to_fetch_registers (t, regcache, regno);
|
|
}
|
|
}
|
|
|
|
/* The to_store_registers method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_store_registers (struct target_ops *ops,
|
|
struct regcache *regcache, int regno)
|
|
{
|
|
struct target_ops *t;
|
|
|
|
if (!record_btrace_generating_corefile
|
|
&& record_btrace_is_replaying (ops, inferior_ptid))
|
|
error (_("Cannot write registers while replaying."));
|
|
|
|
gdb_assert (may_write_registers != 0);
|
|
|
|
t = ops->beneath;
|
|
t->to_store_registers (t, regcache, regno);
|
|
}
|
|
|
|
/* The to_prepare_to_store method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_prepare_to_store (struct target_ops *ops,
|
|
struct regcache *regcache)
|
|
{
|
|
struct target_ops *t;
|
|
|
|
if (!record_btrace_generating_corefile
|
|
&& record_btrace_is_replaying (ops, inferior_ptid))
|
|
return;
|
|
|
|
t = ops->beneath;
|
|
t->to_prepare_to_store (t, regcache);
|
|
}
|
|
|
|
/* The branch trace frame cache. */
|
|
|
|
struct btrace_frame_cache
|
|
{
|
|
/* The thread. */
|
|
struct thread_info *tp;
|
|
|
|
/* The frame info. */
|
|
struct frame_info *frame;
|
|
|
|
/* The branch trace function segment. */
|
|
const struct btrace_function *bfun;
|
|
};
|
|
|
|
/* A struct btrace_frame_cache hash table indexed by NEXT. */
|
|
|
|
static htab_t bfcache;
|
|
|
|
/* hash_f for htab_create_alloc of bfcache. */
|
|
|
|
static hashval_t
|
|
bfcache_hash (const void *arg)
|
|
{
|
|
const struct btrace_frame_cache *cache = arg;
|
|
|
|
return htab_hash_pointer (cache->frame);
|
|
}
|
|
|
|
/* eq_f for htab_create_alloc of bfcache. */
|
|
|
|
static int
|
|
bfcache_eq (const void *arg1, const void *arg2)
|
|
{
|
|
const struct btrace_frame_cache *cache1 = arg1;
|
|
const struct btrace_frame_cache *cache2 = arg2;
|
|
|
|
return cache1->frame == cache2->frame;
|
|
}
|
|
|
|
/* Create a new btrace frame cache. */
|
|
|
|
static struct btrace_frame_cache *
|
|
bfcache_new (struct frame_info *frame)
|
|
{
|
|
struct btrace_frame_cache *cache;
|
|
void **slot;
|
|
|
|
cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache);
|
|
cache->frame = frame;
|
|
|
|
slot = htab_find_slot (bfcache, cache, INSERT);
|
|
gdb_assert (*slot == NULL);
|
|
*slot = cache;
|
|
|
|
return cache;
|
|
}
|
|
|
|
/* Extract the branch trace function from a branch trace frame. */
|
|
|
|
static const struct btrace_function *
|
|
btrace_get_frame_function (struct frame_info *frame)
|
|
{
|
|
const struct btrace_frame_cache *cache;
|
|
const struct btrace_function *bfun;
|
|
struct btrace_frame_cache pattern;
|
|
void **slot;
|
|
|
|
pattern.frame = frame;
|
|
|
|
slot = htab_find_slot (bfcache, &pattern, NO_INSERT);
|
|
if (slot == NULL)
|
|
return NULL;
|
|
|
|
cache = *slot;
|
|
return cache->bfun;
|
|
}
|
|
|
|
/* Implement stop_reason method for record_btrace_frame_unwind. */
|
|
|
|
static enum unwind_stop_reason
|
|
record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame,
|
|
void **this_cache)
|
|
{
|
|
const struct btrace_frame_cache *cache;
|
|
const struct btrace_function *bfun;
|
|
|
|
cache = *this_cache;
|
|
bfun = cache->bfun;
|
|
gdb_assert (bfun != NULL);
|
|
|
|
if (bfun->up == NULL)
|
|
return UNWIND_UNAVAILABLE;
|
|
|
|
return UNWIND_NO_REASON;
|
|
}
|
|
|
|
/* Implement this_id method for record_btrace_frame_unwind. */
|
|
|
|
static void
|
|
record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache,
|
|
struct frame_id *this_id)
|
|
{
|
|
const struct btrace_frame_cache *cache;
|
|
const struct btrace_function *bfun;
|
|
CORE_ADDR code, special;
|
|
|
|
cache = *this_cache;
|
|
|
|
bfun = cache->bfun;
|
|
gdb_assert (bfun != NULL);
|
|
|
|
while (bfun->segment.prev != NULL)
|
|
bfun = bfun->segment.prev;
|
|
|
|
code = get_frame_func (this_frame);
|
|
special = bfun->number;
|
|
|
|
*this_id = frame_id_build_unavailable_stack_special (code, special);
|
|
|
|
DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)",
|
|
btrace_get_bfun_name (cache->bfun),
|
|
core_addr_to_string_nz (this_id->code_addr),
|
|
core_addr_to_string_nz (this_id->special_addr));
|
|
}
|
|
|
|
/* Implement prev_register method for record_btrace_frame_unwind. */
|
|
|
|
static struct value *
|
|
record_btrace_frame_prev_register (struct frame_info *this_frame,
|
|
void **this_cache,
|
|
int regnum)
|
|
{
|
|
const struct btrace_frame_cache *cache;
|
|
const struct btrace_function *bfun, *caller;
|
|
const struct btrace_insn *insn;
|
|
struct gdbarch *gdbarch;
|
|
CORE_ADDR pc;
|
|
int pcreg;
|
|
|
|
gdbarch = get_frame_arch (this_frame);
|
|
pcreg = gdbarch_pc_regnum (gdbarch);
|
|
if (pcreg < 0 || regnum != pcreg)
|
|
throw_error (NOT_AVAILABLE_ERROR,
|
|
_("Registers are not available in btrace record history"));
|
|
|
|
cache = *this_cache;
|
|
bfun = cache->bfun;
|
|
gdb_assert (bfun != NULL);
|
|
|
|
caller = bfun->up;
|
|
if (caller == NULL)
|
|
throw_error (NOT_AVAILABLE_ERROR,
|
|
_("No caller in btrace record history"));
|
|
|
|
if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0)
|
|
{
|
|
insn = VEC_index (btrace_insn_s, caller->insn, 0);
|
|
pc = insn->pc;
|
|
}
|
|
else
|
|
{
|
|
insn = VEC_last (btrace_insn_s, caller->insn);
|
|
pc = insn->pc;
|
|
|
|
pc += gdb_insn_length (gdbarch, pc);
|
|
}
|
|
|
|
DEBUG ("[frame] unwound PC in %s on level %d: %s",
|
|
btrace_get_bfun_name (bfun), bfun->level,
|
|
core_addr_to_string_nz (pc));
|
|
|
|
return frame_unwind_got_address (this_frame, regnum, pc);
|
|
}
|
|
|
|
/* Implement sniffer method for record_btrace_frame_unwind. */
|
|
|
|
static int
|
|
record_btrace_frame_sniffer (const struct frame_unwind *self,
|
|
struct frame_info *this_frame,
|
|
void **this_cache)
|
|
{
|
|
const struct btrace_function *bfun;
|
|
struct btrace_frame_cache *cache;
|
|
struct thread_info *tp;
|
|
struct frame_info *next;
|
|
|
|
/* THIS_FRAME does not contain a reference to its thread. */
|
|
tp = find_thread_ptid (inferior_ptid);
|
|
gdb_assert (tp != NULL);
|
|
|
|
bfun = NULL;
|
|
next = get_next_frame (this_frame);
|
|
if (next == NULL)
|
|
{
|
|
const struct btrace_insn_iterator *replay;
|
|
|
|
replay = tp->btrace.replay;
|
|
if (replay != NULL)
|
|
bfun = replay->function;
|
|
}
|
|
else
|
|
{
|
|
const struct btrace_function *callee;
|
|
|
|
callee = btrace_get_frame_function (next);
|
|
if (callee != NULL && (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0)
|
|
bfun = callee->up;
|
|
}
|
|
|
|
if (bfun == NULL)
|
|
return 0;
|
|
|
|
DEBUG ("[frame] sniffed frame for %s on level %d",
|
|
btrace_get_bfun_name (bfun), bfun->level);
|
|
|
|
/* This is our frame. Initialize the frame cache. */
|
|
cache = bfcache_new (this_frame);
|
|
cache->tp = tp;
|
|
cache->bfun = bfun;
|
|
|
|
*this_cache = cache;
|
|
return 1;
|
|
}
|
|
|
|
/* Implement sniffer method for record_btrace_tailcall_frame_unwind. */
|
|
|
|
static int
|
|
record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self,
|
|
struct frame_info *this_frame,
|
|
void **this_cache)
|
|
{
|
|
const struct btrace_function *bfun, *callee;
|
|
struct btrace_frame_cache *cache;
|
|
struct frame_info *next;
|
|
|
|
next = get_next_frame (this_frame);
|
|
if (next == NULL)
|
|
return 0;
|
|
|
|
callee = btrace_get_frame_function (next);
|
|
if (callee == NULL)
|
|
return 0;
|
|
|
|
if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0)
|
|
return 0;
|
|
|
|
bfun = callee->up;
|
|
if (bfun == NULL)
|
|
return 0;
|
|
|
|
DEBUG ("[frame] sniffed tailcall frame for %s on level %d",
|
|
btrace_get_bfun_name (bfun), bfun->level);
|
|
|
|
/* This is our frame. Initialize the frame cache. */
|
|
cache = bfcache_new (this_frame);
|
|
cache->tp = find_thread_ptid (inferior_ptid);
|
|
cache->bfun = bfun;
|
|
|
|
*this_cache = cache;
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache)
|
|
{
|
|
struct btrace_frame_cache *cache;
|
|
void **slot;
|
|
|
|
cache = this_cache;
|
|
|
|
slot = htab_find_slot (bfcache, cache, NO_INSERT);
|
|
gdb_assert (slot != NULL);
|
|
|
|
htab_remove_elt (bfcache, cache);
|
|
}
|
|
|
|
/* btrace recording does not store previous memory content, neither the stack
|
|
frames content. Any unwinding would return errorneous results as the stack
|
|
contents no longer matches the changed PC value restored from history.
|
|
Therefore this unwinder reports any possibly unwound registers as
|
|
<unavailable>. */
|
|
|
|
const struct frame_unwind record_btrace_frame_unwind =
|
|
{
|
|
NORMAL_FRAME,
|
|
record_btrace_frame_unwind_stop_reason,
|
|
record_btrace_frame_this_id,
|
|
record_btrace_frame_prev_register,
|
|
NULL,
|
|
record_btrace_frame_sniffer,
|
|
record_btrace_frame_dealloc_cache
|
|
};
|
|
|
|
const struct frame_unwind record_btrace_tailcall_frame_unwind =
|
|
{
|
|
TAILCALL_FRAME,
|
|
record_btrace_frame_unwind_stop_reason,
|
|
record_btrace_frame_this_id,
|
|
record_btrace_frame_prev_register,
|
|
NULL,
|
|
record_btrace_tailcall_frame_sniffer,
|
|
record_btrace_frame_dealloc_cache
|
|
};
|
|
|
|
/* Implement the to_get_unwinder method. */
|
|
|
|
static const struct frame_unwind *
|
|
record_btrace_to_get_unwinder (struct target_ops *self)
|
|
{
|
|
return &record_btrace_frame_unwind;
|
|
}
|
|
|
|
/* Implement the to_get_tailcall_unwinder method. */
|
|
|
|
static const struct frame_unwind *
|
|
record_btrace_to_get_tailcall_unwinder (struct target_ops *self)
|
|
{
|
|
return &record_btrace_tailcall_frame_unwind;
|
|
}
|
|
|
|
/* Return a human-readable string for FLAG. */
|
|
|
|
static const char *
|
|
btrace_thread_flag_to_str (enum btrace_thread_flag flag)
|
|
{
|
|
switch (flag)
|
|
{
|
|
case BTHR_STEP:
|
|
return "step";
|
|
|
|
case BTHR_RSTEP:
|
|
return "reverse-step";
|
|
|
|
case BTHR_CONT:
|
|
return "cont";
|
|
|
|
case BTHR_RCONT:
|
|
return "reverse-cont";
|
|
|
|
case BTHR_STOP:
|
|
return "stop";
|
|
}
|
|
|
|
return "<invalid>";
|
|
}
|
|
|
|
/* Indicate that TP should be resumed according to FLAG. */
|
|
|
|
static void
|
|
record_btrace_resume_thread (struct thread_info *tp,
|
|
enum btrace_thread_flag flag)
|
|
{
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
DEBUG ("resuming thread %d (%s): %x (%s)", tp->num,
|
|
target_pid_to_str (tp->ptid), flag, btrace_thread_flag_to_str (flag));
|
|
|
|
btinfo = &tp->btrace;
|
|
|
|
/* Fetch the latest branch trace. */
|
|
btrace_fetch (tp);
|
|
|
|
/* A resume request overwrites a preceding resume or stop request. */
|
|
btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP);
|
|
btinfo->flags |= flag;
|
|
}
|
|
|
|
/* Get the current frame for TP. */
|
|
|
|
static struct frame_info *
|
|
get_thread_current_frame (struct thread_info *tp)
|
|
{
|
|
struct frame_info *frame;
|
|
ptid_t old_inferior_ptid;
|
|
int executing;
|
|
|
|
/* Set INFERIOR_PTID, which is implicitly used by get_current_frame. */
|
|
old_inferior_ptid = inferior_ptid;
|
|
inferior_ptid = tp->ptid;
|
|
|
|
/* Clear the executing flag to allow changes to the current frame.
|
|
We are not actually running, yet. We just started a reverse execution
|
|
command or a record goto command.
|
|
For the latter, EXECUTING is false and this has no effect.
|
|
For the former, EXECUTING is true and we're in to_wait, about to
|
|
move the thread. Since we need to recompute the stack, we temporarily
|
|
set EXECUTING to flase. */
|
|
executing = is_executing (inferior_ptid);
|
|
set_executing (inferior_ptid, 0);
|
|
|
|
frame = NULL;
|
|
TRY
|
|
{
|
|
frame = get_current_frame ();
|
|
}
|
|
CATCH (except, RETURN_MASK_ALL)
|
|
{
|
|
/* Restore the previous execution state. */
|
|
set_executing (inferior_ptid, executing);
|
|
|
|
/* Restore the previous inferior_ptid. */
|
|
inferior_ptid = old_inferior_ptid;
|
|
|
|
throw_exception (except);
|
|
}
|
|
END_CATCH
|
|
|
|
/* Restore the previous execution state. */
|
|
set_executing (inferior_ptid, executing);
|
|
|
|
/* Restore the previous inferior_ptid. */
|
|
inferior_ptid = old_inferior_ptid;
|
|
|
|
return frame;
|
|
}
|
|
|
|
/* Start replaying a thread. */
|
|
|
|
static struct btrace_insn_iterator *
|
|
record_btrace_start_replaying (struct thread_info *tp)
|
|
{
|
|
struct btrace_insn_iterator *replay;
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
btinfo = &tp->btrace;
|
|
replay = NULL;
|
|
|
|
/* We can't start replaying without trace. */
|
|
if (btinfo->begin == NULL)
|
|
return NULL;
|
|
|
|
/* GDB stores the current frame_id when stepping in order to detects steps
|
|
into subroutines.
|
|
Since frames are computed differently when we're replaying, we need to
|
|
recompute those stored frames and fix them up so we can still detect
|
|
subroutines after we started replaying. */
|
|
TRY
|
|
{
|
|
struct frame_info *frame;
|
|
struct frame_id frame_id;
|
|
int upd_step_frame_id, upd_step_stack_frame_id;
|
|
|
|
/* The current frame without replaying - computed via normal unwind. */
|
|
frame = get_thread_current_frame (tp);
|
|
frame_id = get_frame_id (frame);
|
|
|
|
/* Check if we need to update any stepping-related frame id's. */
|
|
upd_step_frame_id = frame_id_eq (frame_id,
|
|
tp->control.step_frame_id);
|
|
upd_step_stack_frame_id = frame_id_eq (frame_id,
|
|
tp->control.step_stack_frame_id);
|
|
|
|
/* We start replaying at the end of the branch trace. This corresponds
|
|
to the current instruction. */
|
|
replay = XNEW (struct btrace_insn_iterator);
|
|
btrace_insn_end (replay, btinfo);
|
|
|
|
/* Skip gaps at the end of the trace. */
|
|
while (btrace_insn_get (replay) == NULL)
|
|
{
|
|
unsigned int steps;
|
|
|
|
steps = btrace_insn_prev (replay, 1);
|
|
if (steps == 0)
|
|
error (_("No trace."));
|
|
}
|
|
|
|
/* We're not replaying, yet. */
|
|
gdb_assert (btinfo->replay == NULL);
|
|
btinfo->replay = replay;
|
|
|
|
/* Make sure we're not using any stale registers. */
|
|
registers_changed_ptid (tp->ptid);
|
|
|
|
/* The current frame with replaying - computed via btrace unwind. */
|
|
frame = get_thread_current_frame (tp);
|
|
frame_id = get_frame_id (frame);
|
|
|
|
/* Replace stepping related frames where necessary. */
|
|
if (upd_step_frame_id)
|
|
tp->control.step_frame_id = frame_id;
|
|
if (upd_step_stack_frame_id)
|
|
tp->control.step_stack_frame_id = frame_id;
|
|
}
|
|
CATCH (except, RETURN_MASK_ALL)
|
|
{
|
|
xfree (btinfo->replay);
|
|
btinfo->replay = NULL;
|
|
|
|
registers_changed_ptid (tp->ptid);
|
|
|
|
throw_exception (except);
|
|
}
|
|
END_CATCH
|
|
|
|
return replay;
|
|
}
|
|
|
|
/* Stop replaying a thread. */
|
|
|
|
static void
|
|
record_btrace_stop_replaying (struct thread_info *tp)
|
|
{
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
btinfo = &tp->btrace;
|
|
|
|
xfree (btinfo->replay);
|
|
btinfo->replay = NULL;
|
|
|
|
/* Make sure we're not leaving any stale registers. */
|
|
registers_changed_ptid (tp->ptid);
|
|
}
|
|
|
|
/* Stop replaying TP if it is at the end of its execution history. */
|
|
|
|
static void
|
|
record_btrace_stop_replaying_at_end (struct thread_info *tp)
|
|
{
|
|
struct btrace_insn_iterator *replay, end;
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
btinfo = &tp->btrace;
|
|
replay = btinfo->replay;
|
|
|
|
if (replay == NULL)
|
|
return;
|
|
|
|
btrace_insn_end (&end, btinfo);
|
|
|
|
if (btrace_insn_cmp (replay, &end) == 0)
|
|
record_btrace_stop_replaying (tp);
|
|
}
|
|
|
|
/* The to_resume method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step,
|
|
enum gdb_signal signal)
|
|
{
|
|
struct thread_info *tp;
|
|
enum btrace_thread_flag flag, cflag;
|
|
|
|
DEBUG ("resume %s: %s%s", target_pid_to_str (ptid),
|
|
execution_direction == EXEC_REVERSE ? "reverse-" : "",
|
|
step ? "step" : "cont");
|
|
|
|
/* Store the execution direction of the last resume.
|
|
|
|
If there is more than one to_resume call, we have to rely on infrun
|
|
to not change the execution direction in-between. */
|
|
record_btrace_resume_exec_dir = execution_direction;
|
|
|
|
/* As long as we're not replaying, just forward the request.
|
|
|
|
For non-stop targets this means that no thread is replaying. In order to
|
|
make progress, we may need to explicitly move replaying threads to the end
|
|
of their execution history. */
|
|
if ((execution_direction != EXEC_REVERSE)
|
|
&& !record_btrace_is_replaying (ops, minus_one_ptid))
|
|
{
|
|
ops = ops->beneath;
|
|
return ops->to_resume (ops, ptid, step, signal);
|
|
}
|
|
|
|
/* Compute the btrace thread flag for the requested move. */
|
|
if (execution_direction == EXEC_REVERSE)
|
|
{
|
|
flag = step == 0 ? BTHR_RCONT : BTHR_RSTEP;
|
|
cflag = BTHR_RCONT;
|
|
}
|
|
else
|
|
{
|
|
flag = step == 0 ? BTHR_CONT : BTHR_STEP;
|
|
cflag = BTHR_CONT;
|
|
}
|
|
|
|
/* We just indicate the resume intent here. The actual stepping happens in
|
|
record_btrace_wait below.
|
|
|
|
For all-stop targets, we only step INFERIOR_PTID and continue others. */
|
|
if (!target_is_non_stop_p ())
|
|
{
|
|
gdb_assert (ptid_match (inferior_ptid, ptid));
|
|
|
|
ALL_NON_EXITED_THREADS (tp)
|
|
if (ptid_match (tp->ptid, ptid))
|
|
{
|
|
if (ptid_match (tp->ptid, inferior_ptid))
|
|
record_btrace_resume_thread (tp, flag);
|
|
else
|
|
record_btrace_resume_thread (tp, cflag);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ALL_NON_EXITED_THREADS (tp)
|
|
if (ptid_match (tp->ptid, ptid))
|
|
record_btrace_resume_thread (tp, flag);
|
|
}
|
|
|
|
/* Async support. */
|
|
if (target_can_async_p ())
|
|
{
|
|
target_async (1);
|
|
mark_async_event_handler (record_btrace_async_inferior_event_handler);
|
|
}
|
|
}
|
|
|
|
/* Cancel resuming TP. */
|
|
|
|
static void
|
|
record_btrace_cancel_resume (struct thread_info *tp)
|
|
{
|
|
enum btrace_thread_flag flags;
|
|
|
|
flags = tp->btrace.flags & (BTHR_MOVE | BTHR_STOP);
|
|
if (flags == 0)
|
|
return;
|
|
|
|
DEBUG ("cancel resume thread %d (%s): %x (%s)", tp->num,
|
|
target_pid_to_str (tp->ptid), flags,
|
|
btrace_thread_flag_to_str (flags));
|
|
|
|
tp->btrace.flags &= ~(BTHR_MOVE | BTHR_STOP);
|
|
record_btrace_stop_replaying_at_end (tp);
|
|
}
|
|
|
|
/* Return a target_waitstatus indicating that we ran out of history. */
|
|
|
|
static struct target_waitstatus
|
|
btrace_step_no_history (void)
|
|
{
|
|
struct target_waitstatus status;
|
|
|
|
status.kind = TARGET_WAITKIND_NO_HISTORY;
|
|
|
|
return status;
|
|
}
|
|
|
|
/* Return a target_waitstatus indicating that a step finished. */
|
|
|
|
static struct target_waitstatus
|
|
btrace_step_stopped (void)
|
|
{
|
|
struct target_waitstatus status;
|
|
|
|
status.kind = TARGET_WAITKIND_STOPPED;
|
|
status.value.sig = GDB_SIGNAL_TRAP;
|
|
|
|
return status;
|
|
}
|
|
|
|
/* Return a target_waitstatus indicating that a thread was stopped as
|
|
requested. */
|
|
|
|
static struct target_waitstatus
|
|
btrace_step_stopped_on_request (void)
|
|
{
|
|
struct target_waitstatus status;
|
|
|
|
status.kind = TARGET_WAITKIND_STOPPED;
|
|
status.value.sig = GDB_SIGNAL_0;
|
|
|
|
return status;
|
|
}
|
|
|
|
/* Return a target_waitstatus indicating a spurious stop. */
|
|
|
|
static struct target_waitstatus
|
|
btrace_step_spurious (void)
|
|
{
|
|
struct target_waitstatus status;
|
|
|
|
status.kind = TARGET_WAITKIND_SPURIOUS;
|
|
|
|
return status;
|
|
}
|
|
|
|
/* Return a target_waitstatus indicating that the thread was not resumed. */
|
|
|
|
static struct target_waitstatus
|
|
btrace_step_no_resumed (void)
|
|
{
|
|
struct target_waitstatus status;
|
|
|
|
status.kind = TARGET_WAITKIND_NO_RESUMED;
|
|
|
|
return status;
|
|
}
|
|
|
|
/* Return a target_waitstatus indicating that we should wait again. */
|
|
|
|
static struct target_waitstatus
|
|
btrace_step_again (void)
|
|
{
|
|
struct target_waitstatus status;
|
|
|
|
status.kind = TARGET_WAITKIND_IGNORE;
|
|
|
|
return status;
|
|
}
|
|
|
|
/* Clear the record histories. */
|
|
|
|
static void
|
|
record_btrace_clear_histories (struct btrace_thread_info *btinfo)
|
|
{
|
|
xfree (btinfo->insn_history);
|
|
xfree (btinfo->call_history);
|
|
|
|
btinfo->insn_history = NULL;
|
|
btinfo->call_history = NULL;
|
|
}
|
|
|
|
/* Check whether TP's current replay position is at a breakpoint. */
|
|
|
|
static int
|
|
record_btrace_replay_at_breakpoint (struct thread_info *tp)
|
|
{
|
|
struct btrace_insn_iterator *replay;
|
|
struct btrace_thread_info *btinfo;
|
|
const struct btrace_insn *insn;
|
|
struct inferior *inf;
|
|
|
|
btinfo = &tp->btrace;
|
|
replay = btinfo->replay;
|
|
|
|
if (replay == NULL)
|
|
return 0;
|
|
|
|
insn = btrace_insn_get (replay);
|
|
if (insn == NULL)
|
|
return 0;
|
|
|
|
inf = find_inferior_ptid (tp->ptid);
|
|
if (inf == NULL)
|
|
return 0;
|
|
|
|
return record_check_stopped_by_breakpoint (inf->aspace, insn->pc,
|
|
&btinfo->stop_reason);
|
|
}
|
|
|
|
/* Step one instruction in forward direction. */
|
|
|
|
static struct target_waitstatus
|
|
record_btrace_single_step_forward (struct thread_info *tp)
|
|
{
|
|
struct btrace_insn_iterator *replay, end;
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
btinfo = &tp->btrace;
|
|
replay = btinfo->replay;
|
|
|
|
/* We're done if we're not replaying. */
|
|
if (replay == NULL)
|
|
return btrace_step_no_history ();
|
|
|
|
/* Check if we're stepping a breakpoint. */
|
|
if (record_btrace_replay_at_breakpoint (tp))
|
|
return btrace_step_stopped ();
|
|
|
|
/* Skip gaps during replay. */
|
|
do
|
|
{
|
|
unsigned int steps;
|
|
|
|
/* We will bail out here if we continue stepping after reaching the end
|
|
of the execution history. */
|
|
steps = btrace_insn_next (replay, 1);
|
|
if (steps == 0)
|
|
return btrace_step_no_history ();
|
|
}
|
|
while (btrace_insn_get (replay) == NULL);
|
|
|
|
/* Determine the end of the instruction trace. */
|
|
btrace_insn_end (&end, btinfo);
|
|
|
|
/* The execution trace contains (and ends with) the current instruction.
|
|
This instruction has not been executed, yet, so the trace really ends
|
|
one instruction earlier. */
|
|
if (btrace_insn_cmp (replay, &end) == 0)
|
|
return btrace_step_no_history ();
|
|
|
|
return btrace_step_spurious ();
|
|
}
|
|
|
|
/* Step one instruction in backward direction. */
|
|
|
|
static struct target_waitstatus
|
|
record_btrace_single_step_backward (struct thread_info *tp)
|
|
{
|
|
struct btrace_insn_iterator *replay;
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
btinfo = &tp->btrace;
|
|
replay = btinfo->replay;
|
|
|
|
/* Start replaying if we're not already doing so. */
|
|
if (replay == NULL)
|
|
replay = record_btrace_start_replaying (tp);
|
|
|
|
/* If we can't step any further, we reached the end of the history.
|
|
Skip gaps during replay. */
|
|
do
|
|
{
|
|
unsigned int steps;
|
|
|
|
steps = btrace_insn_prev (replay, 1);
|
|
if (steps == 0)
|
|
return btrace_step_no_history ();
|
|
}
|
|
while (btrace_insn_get (replay) == NULL);
|
|
|
|
/* Check if we're stepping a breakpoint.
|
|
|
|
For reverse-stepping, this check is after the step. There is logic in
|
|
infrun.c that handles reverse-stepping separately. See, for example,
|
|
proceed and adjust_pc_after_break.
|
|
|
|
This code assumes that for reverse-stepping, PC points to the last
|
|
de-executed instruction, whereas for forward-stepping PC points to the
|
|
next to-be-executed instruction. */
|
|
if (record_btrace_replay_at_breakpoint (tp))
|
|
return btrace_step_stopped ();
|
|
|
|
return btrace_step_spurious ();
|
|
}
|
|
|
|
/* Step a single thread. */
|
|
|
|
static struct target_waitstatus
|
|
record_btrace_step_thread (struct thread_info *tp)
|
|
{
|
|
struct btrace_thread_info *btinfo;
|
|
struct target_waitstatus status;
|
|
enum btrace_thread_flag flags;
|
|
|
|
btinfo = &tp->btrace;
|
|
|
|
flags = btinfo->flags & (BTHR_MOVE | BTHR_STOP);
|
|
btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP);
|
|
|
|
DEBUG ("stepping thread %d (%s): %x (%s)", tp->num,
|
|
target_pid_to_str (tp->ptid), flags,
|
|
btrace_thread_flag_to_str (flags));
|
|
|
|
/* We can't step without an execution history. */
|
|
if ((flags & BTHR_MOVE) != 0 && btrace_is_empty (tp))
|
|
return btrace_step_no_history ();
|
|
|
|
switch (flags)
|
|
{
|
|
default:
|
|
internal_error (__FILE__, __LINE__, _("invalid stepping type."));
|
|
|
|
case BTHR_STOP:
|
|
return btrace_step_stopped_on_request ();
|
|
|
|
case BTHR_STEP:
|
|
status = record_btrace_single_step_forward (tp);
|
|
if (status.kind != TARGET_WAITKIND_SPURIOUS)
|
|
break;
|
|
|
|
return btrace_step_stopped ();
|
|
|
|
case BTHR_RSTEP:
|
|
status = record_btrace_single_step_backward (tp);
|
|
if (status.kind != TARGET_WAITKIND_SPURIOUS)
|
|
break;
|
|
|
|
return btrace_step_stopped ();
|
|
|
|
case BTHR_CONT:
|
|
status = record_btrace_single_step_forward (tp);
|
|
if (status.kind != TARGET_WAITKIND_SPURIOUS)
|
|
break;
|
|
|
|
btinfo->flags |= flags;
|
|
return btrace_step_again ();
|
|
|
|
case BTHR_RCONT:
|
|
status = record_btrace_single_step_backward (tp);
|
|
if (status.kind != TARGET_WAITKIND_SPURIOUS)
|
|
break;
|
|
|
|
btinfo->flags |= flags;
|
|
return btrace_step_again ();
|
|
}
|
|
|
|
/* We keep threads moving at the end of their execution history. The to_wait
|
|
method will stop the thread for whom the event is reported. */
|
|
if (status.kind == TARGET_WAITKIND_NO_HISTORY)
|
|
btinfo->flags |= flags;
|
|
|
|
return status;
|
|
}
|
|
|
|
/* A vector of threads. */
|
|
|
|
typedef struct thread_info * tp_t;
|
|
DEF_VEC_P (tp_t);
|
|
|
|
/* Announce further events if necessary. */
|
|
|
|
static void
|
|
record_btrace_maybe_mark_async_event (const VEC (tp_t) *moving,
|
|
const VEC (tp_t) *no_history)
|
|
{
|
|
int more_moving, more_no_history;
|
|
|
|
more_moving = !VEC_empty (tp_t, moving);
|
|
more_no_history = !VEC_empty (tp_t, no_history);
|
|
|
|
if (!more_moving && !more_no_history)
|
|
return;
|
|
|
|
if (more_moving)
|
|
DEBUG ("movers pending");
|
|
|
|
if (more_no_history)
|
|
DEBUG ("no-history pending");
|
|
|
|
mark_async_event_handler (record_btrace_async_inferior_event_handler);
|
|
}
|
|
|
|
/* The to_wait method of target record-btrace. */
|
|
|
|
static ptid_t
|
|
record_btrace_wait (struct target_ops *ops, ptid_t ptid,
|
|
struct target_waitstatus *status, int options)
|
|
{
|
|
VEC (tp_t) *moving, *no_history;
|
|
struct thread_info *tp, *eventing;
|
|
struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
|
|
|
|
DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid), options);
|
|
|
|
/* As long as we're not replaying, just forward the request. */
|
|
if ((execution_direction != EXEC_REVERSE)
|
|
&& !record_btrace_is_replaying (ops, minus_one_ptid))
|
|
{
|
|
ops = ops->beneath;
|
|
return ops->to_wait (ops, ptid, status, options);
|
|
}
|
|
|
|
moving = NULL;
|
|
no_history = NULL;
|
|
|
|
make_cleanup (VEC_cleanup (tp_t), &moving);
|
|
make_cleanup (VEC_cleanup (tp_t), &no_history);
|
|
|
|
/* Keep a work list of moving threads. */
|
|
ALL_NON_EXITED_THREADS (tp)
|
|
if (ptid_match (tp->ptid, ptid)
|
|
&& ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0))
|
|
VEC_safe_push (tp_t, moving, tp);
|
|
|
|
if (VEC_empty (tp_t, moving))
|
|
{
|
|
*status = btrace_step_no_resumed ();
|
|
|
|
DEBUG ("wait ended by %s: %s", target_pid_to_str (null_ptid),
|
|
target_waitstatus_to_string (status));
|
|
|
|
do_cleanups (cleanups);
|
|
return null_ptid;
|
|
}
|
|
|
|
/* Step moving threads one by one, one step each, until either one thread
|
|
reports an event or we run out of threads to step.
|
|
|
|
When stepping more than one thread, chances are that some threads reach
|
|
the end of their execution history earlier than others. If we reported
|
|
this immediately, all-stop on top of non-stop would stop all threads and
|
|
resume the same threads next time. And we would report the same thread
|
|
having reached the end of its execution history again.
|
|
|
|
In the worst case, this would starve the other threads. But even if other
|
|
threads would be allowed to make progress, this would result in far too
|
|
many intermediate stops.
|
|
|
|
We therefore delay the reporting of "no execution history" until we have
|
|
nothing else to report. By this time, all threads should have moved to
|
|
either the beginning or the end of their execution history. There will
|
|
be a single user-visible stop. */
|
|
eventing = NULL;
|
|
while ((eventing == NULL) && !VEC_empty (tp_t, moving))
|
|
{
|
|
unsigned int ix;
|
|
|
|
ix = 0;
|
|
while ((eventing == NULL) && VEC_iterate (tp_t, moving, ix, tp))
|
|
{
|
|
*status = record_btrace_step_thread (tp);
|
|
|
|
switch (status->kind)
|
|
{
|
|
case TARGET_WAITKIND_IGNORE:
|
|
ix++;
|
|
break;
|
|
|
|
case TARGET_WAITKIND_NO_HISTORY:
|
|
VEC_safe_push (tp_t, no_history,
|
|
VEC_ordered_remove (tp_t, moving, ix));
|
|
break;
|
|
|
|
default:
|
|
eventing = VEC_unordered_remove (tp_t, moving, ix);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (eventing == NULL)
|
|
{
|
|
/* We started with at least one moving thread. This thread must have
|
|
either stopped or reached the end of its execution history.
|
|
|
|
In the former case, EVENTING must not be NULL.
|
|
In the latter case, NO_HISTORY must not be empty. */
|
|
gdb_assert (!VEC_empty (tp_t, no_history));
|
|
|
|
/* We kept threads moving at the end of their execution history. Stop
|
|
EVENTING now that we are going to report its stop. */
|
|
eventing = VEC_unordered_remove (tp_t, no_history, 0);
|
|
eventing->btrace.flags &= ~BTHR_MOVE;
|
|
|
|
*status = btrace_step_no_history ();
|
|
}
|
|
|
|
gdb_assert (eventing != NULL);
|
|
|
|
/* We kept threads replaying at the end of their execution history. Stop
|
|
replaying EVENTING now that we are going to report its stop. */
|
|
record_btrace_stop_replaying_at_end (eventing);
|
|
|
|
/* Stop all other threads. */
|
|
if (!target_is_non_stop_p ())
|
|
ALL_NON_EXITED_THREADS (tp)
|
|
record_btrace_cancel_resume (tp);
|
|
|
|
/* In async mode, we need to announce further events. */
|
|
if (target_is_async_p ())
|
|
record_btrace_maybe_mark_async_event (moving, no_history);
|
|
|
|
/* Start record histories anew from the current position. */
|
|
record_btrace_clear_histories (&eventing->btrace);
|
|
|
|
/* We moved the replay position but did not update registers. */
|
|
registers_changed_ptid (eventing->ptid);
|
|
|
|
DEBUG ("wait ended by thread %d (%s): %s", eventing->num,
|
|
target_pid_to_str (eventing->ptid),
|
|
target_waitstatus_to_string (status));
|
|
|
|
do_cleanups (cleanups);
|
|
return eventing->ptid;
|
|
}
|
|
|
|
/* The to_stop method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_stop (struct target_ops *ops, ptid_t ptid)
|
|
{
|
|
DEBUG ("stop %s", target_pid_to_str (ptid));
|
|
|
|
/* As long as we're not replaying, just forward the request. */
|
|
if ((execution_direction != EXEC_REVERSE)
|
|
&& !record_btrace_is_replaying (ops, minus_one_ptid))
|
|
{
|
|
ops = ops->beneath;
|
|
ops->to_stop (ops, ptid);
|
|
}
|
|
else
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
ALL_NON_EXITED_THREADS (tp)
|
|
if (ptid_match (tp->ptid, ptid))
|
|
{
|
|
tp->btrace.flags &= ~BTHR_MOVE;
|
|
tp->btrace.flags |= BTHR_STOP;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* The to_can_execute_reverse method of target record-btrace. */
|
|
|
|
static int
|
|
record_btrace_can_execute_reverse (struct target_ops *self)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* The to_stopped_by_sw_breakpoint method of target record-btrace. */
|
|
|
|
static int
|
|
record_btrace_stopped_by_sw_breakpoint (struct target_ops *ops)
|
|
{
|
|
if (record_btrace_is_replaying (ops, minus_one_ptid))
|
|
{
|
|
struct thread_info *tp = inferior_thread ();
|
|
|
|
return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT;
|
|
}
|
|
|
|
return ops->beneath->to_stopped_by_sw_breakpoint (ops->beneath);
|
|
}
|
|
|
|
/* The to_supports_stopped_by_sw_breakpoint method of target
|
|
record-btrace. */
|
|
|
|
static int
|
|
record_btrace_supports_stopped_by_sw_breakpoint (struct target_ops *ops)
|
|
{
|
|
if (record_btrace_is_replaying (ops, minus_one_ptid))
|
|
return 1;
|
|
|
|
return ops->beneath->to_supports_stopped_by_sw_breakpoint (ops->beneath);
|
|
}
|
|
|
|
/* The to_stopped_by_sw_breakpoint method of target record-btrace. */
|
|
|
|
static int
|
|
record_btrace_stopped_by_hw_breakpoint (struct target_ops *ops)
|
|
{
|
|
if (record_btrace_is_replaying (ops, minus_one_ptid))
|
|
{
|
|
struct thread_info *tp = inferior_thread ();
|
|
|
|
return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT;
|
|
}
|
|
|
|
return ops->beneath->to_stopped_by_hw_breakpoint (ops->beneath);
|
|
}
|
|
|
|
/* The to_supports_stopped_by_hw_breakpoint method of target
|
|
record-btrace. */
|
|
|
|
static int
|
|
record_btrace_supports_stopped_by_hw_breakpoint (struct target_ops *ops)
|
|
{
|
|
if (record_btrace_is_replaying (ops, minus_one_ptid))
|
|
return 1;
|
|
|
|
return ops->beneath->to_supports_stopped_by_hw_breakpoint (ops->beneath);
|
|
}
|
|
|
|
/* The to_update_thread_list method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_update_thread_list (struct target_ops *ops)
|
|
{
|
|
/* We don't add or remove threads during replay. */
|
|
if (record_btrace_is_replaying (ops, minus_one_ptid))
|
|
return;
|
|
|
|
/* Forward the request. */
|
|
ops = ops->beneath;
|
|
ops->to_update_thread_list (ops);
|
|
}
|
|
|
|
/* The to_thread_alive method of target record-btrace. */
|
|
|
|
static int
|
|
record_btrace_thread_alive (struct target_ops *ops, ptid_t ptid)
|
|
{
|
|
/* We don't add or remove threads during replay. */
|
|
if (record_btrace_is_replaying (ops, minus_one_ptid))
|
|
return find_thread_ptid (ptid) != NULL;
|
|
|
|
/* Forward the request. */
|
|
ops = ops->beneath;
|
|
return ops->to_thread_alive (ops, ptid);
|
|
}
|
|
|
|
/* Set the replay branch trace instruction iterator. If IT is NULL, replay
|
|
is stopped. */
|
|
|
|
static void
|
|
record_btrace_set_replay (struct thread_info *tp,
|
|
const struct btrace_insn_iterator *it)
|
|
{
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
btinfo = &tp->btrace;
|
|
|
|
if (it == NULL || it->function == NULL)
|
|
record_btrace_stop_replaying (tp);
|
|
else
|
|
{
|
|
if (btinfo->replay == NULL)
|
|
record_btrace_start_replaying (tp);
|
|
else if (btrace_insn_cmp (btinfo->replay, it) == 0)
|
|
return;
|
|
|
|
*btinfo->replay = *it;
|
|
registers_changed_ptid (tp->ptid);
|
|
}
|
|
|
|
/* Start anew from the new replay position. */
|
|
record_btrace_clear_histories (btinfo);
|
|
|
|
stop_pc = regcache_read_pc (get_current_regcache ());
|
|
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
|
|
}
|
|
|
|
/* The to_goto_record_begin method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_goto_begin (struct target_ops *self)
|
|
{
|
|
struct thread_info *tp;
|
|
struct btrace_insn_iterator begin;
|
|
|
|
tp = require_btrace_thread ();
|
|
|
|
btrace_insn_begin (&begin, &tp->btrace);
|
|
record_btrace_set_replay (tp, &begin);
|
|
}
|
|
|
|
/* The to_goto_record_end method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_goto_end (struct target_ops *ops)
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
tp = require_btrace_thread ();
|
|
|
|
record_btrace_set_replay (tp, NULL);
|
|
}
|
|
|
|
/* The to_goto_record method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_goto (struct target_ops *self, ULONGEST insn)
|
|
{
|
|
struct thread_info *tp;
|
|
struct btrace_insn_iterator it;
|
|
unsigned int number;
|
|
int found;
|
|
|
|
number = insn;
|
|
|
|
/* Check for wrap-arounds. */
|
|
if (number != insn)
|
|
error (_("Instruction number out of range."));
|
|
|
|
tp = require_btrace_thread ();
|
|
|
|
found = btrace_find_insn_by_number (&it, &tp->btrace, number);
|
|
if (found == 0)
|
|
error (_("No such instruction."));
|
|
|
|
record_btrace_set_replay (tp, &it);
|
|
}
|
|
|
|
/* The to_record_stop_replaying method of target record-btrace. */
|
|
|
|
static void
|
|
record_btrace_stop_replaying_all (struct target_ops *self)
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
ALL_NON_EXITED_THREADS (tp)
|
|
record_btrace_stop_replaying (tp);
|
|
}
|
|
|
|
/* The to_execution_direction target method. */
|
|
|
|
static enum exec_direction_kind
|
|
record_btrace_execution_direction (struct target_ops *self)
|
|
{
|
|
return record_btrace_resume_exec_dir;
|
|
}
|
|
|
|
/* The to_prepare_to_generate_core target method. */
|
|
|
|
static void
|
|
record_btrace_prepare_to_generate_core (struct target_ops *self)
|
|
{
|
|
record_btrace_generating_corefile = 1;
|
|
}
|
|
|
|
/* The to_done_generating_core target method. */
|
|
|
|
static void
|
|
record_btrace_done_generating_core (struct target_ops *self)
|
|
{
|
|
record_btrace_generating_corefile = 0;
|
|
}
|
|
|
|
/* Initialize the record-btrace target ops. */
|
|
|
|
static void
|
|
init_record_btrace_ops (void)
|
|
{
|
|
struct target_ops *ops;
|
|
|
|
ops = &record_btrace_ops;
|
|
ops->to_shortname = "record-btrace";
|
|
ops->to_longname = "Branch tracing target";
|
|
ops->to_doc = "Collect control-flow trace and provide the execution history.";
|
|
ops->to_open = record_btrace_open;
|
|
ops->to_close = record_btrace_close;
|
|
ops->to_async = record_btrace_async;
|
|
ops->to_detach = record_detach;
|
|
ops->to_disconnect = record_disconnect;
|
|
ops->to_mourn_inferior = record_mourn_inferior;
|
|
ops->to_kill = record_kill;
|
|
ops->to_stop_recording = record_btrace_stop_recording;
|
|
ops->to_info_record = record_btrace_info;
|
|
ops->to_insn_history = record_btrace_insn_history;
|
|
ops->to_insn_history_from = record_btrace_insn_history_from;
|
|
ops->to_insn_history_range = record_btrace_insn_history_range;
|
|
ops->to_call_history = record_btrace_call_history;
|
|
ops->to_call_history_from = record_btrace_call_history_from;
|
|
ops->to_call_history_range = record_btrace_call_history_range;
|
|
ops->to_record_is_replaying = record_btrace_is_replaying;
|
|
ops->to_record_will_replay = record_btrace_will_replay;
|
|
ops->to_record_stop_replaying = record_btrace_stop_replaying_all;
|
|
ops->to_xfer_partial = record_btrace_xfer_partial;
|
|
ops->to_remove_breakpoint = record_btrace_remove_breakpoint;
|
|
ops->to_insert_breakpoint = record_btrace_insert_breakpoint;
|
|
ops->to_fetch_registers = record_btrace_fetch_registers;
|
|
ops->to_store_registers = record_btrace_store_registers;
|
|
ops->to_prepare_to_store = record_btrace_prepare_to_store;
|
|
ops->to_get_unwinder = &record_btrace_to_get_unwinder;
|
|
ops->to_get_tailcall_unwinder = &record_btrace_to_get_tailcall_unwinder;
|
|
ops->to_resume = record_btrace_resume;
|
|
ops->to_wait = record_btrace_wait;
|
|
ops->to_stop = record_btrace_stop;
|
|
ops->to_update_thread_list = record_btrace_update_thread_list;
|
|
ops->to_thread_alive = record_btrace_thread_alive;
|
|
ops->to_goto_record_begin = record_btrace_goto_begin;
|
|
ops->to_goto_record_end = record_btrace_goto_end;
|
|
ops->to_goto_record = record_btrace_goto;
|
|
ops->to_can_execute_reverse = record_btrace_can_execute_reverse;
|
|
ops->to_stopped_by_sw_breakpoint = record_btrace_stopped_by_sw_breakpoint;
|
|
ops->to_supports_stopped_by_sw_breakpoint
|
|
= record_btrace_supports_stopped_by_sw_breakpoint;
|
|
ops->to_stopped_by_hw_breakpoint = record_btrace_stopped_by_hw_breakpoint;
|
|
ops->to_supports_stopped_by_hw_breakpoint
|
|
= record_btrace_supports_stopped_by_hw_breakpoint;
|
|
ops->to_execution_direction = record_btrace_execution_direction;
|
|
ops->to_prepare_to_generate_core = record_btrace_prepare_to_generate_core;
|
|
ops->to_done_generating_core = record_btrace_done_generating_core;
|
|
ops->to_stratum = record_stratum;
|
|
ops->to_magic = OPS_MAGIC;
|
|
}
|
|
|
|
/* Start recording in BTS format. */
|
|
|
|
static void
|
|
cmd_record_btrace_bts_start (char *args, int from_tty)
|
|
{
|
|
if (args != NULL && *args != 0)
|
|
error (_("Invalid argument."));
|
|
|
|
record_btrace_conf.format = BTRACE_FORMAT_BTS;
|
|
|
|
TRY
|
|
{
|
|
execute_command ("target record-btrace", from_tty);
|
|
}
|
|
CATCH (exception, RETURN_MASK_ALL)
|
|
{
|
|
record_btrace_conf.format = BTRACE_FORMAT_NONE;
|
|
throw_exception (exception);
|
|
}
|
|
END_CATCH
|
|
}
|
|
|
|
/* Start recording Intel(R) Processor Trace. */
|
|
|
|
static void
|
|
cmd_record_btrace_pt_start (char *args, int from_tty)
|
|
{
|
|
if (args != NULL && *args != 0)
|
|
error (_("Invalid argument."));
|
|
|
|
record_btrace_conf.format = BTRACE_FORMAT_PT;
|
|
|
|
TRY
|
|
{
|
|
execute_command ("target record-btrace", from_tty);
|
|
}
|
|
CATCH (exception, RETURN_MASK_ALL)
|
|
{
|
|
record_btrace_conf.format = BTRACE_FORMAT_NONE;
|
|
throw_exception (exception);
|
|
}
|
|
END_CATCH
|
|
}
|
|
|
|
/* Alias for "target record". */
|
|
|
|
static void
|
|
cmd_record_btrace_start (char *args, int from_tty)
|
|
{
|
|
if (args != NULL && *args != 0)
|
|
error (_("Invalid argument."));
|
|
|
|
record_btrace_conf.format = BTRACE_FORMAT_PT;
|
|
|
|
TRY
|
|
{
|
|
execute_command ("target record-btrace", from_tty);
|
|
}
|
|
CATCH (exception, RETURN_MASK_ALL)
|
|
{
|
|
record_btrace_conf.format = BTRACE_FORMAT_BTS;
|
|
|
|
TRY
|
|
{
|
|
execute_command ("target record-btrace", from_tty);
|
|
}
|
|
CATCH (exception, RETURN_MASK_ALL)
|
|
{
|
|
record_btrace_conf.format = BTRACE_FORMAT_NONE;
|
|
throw_exception (exception);
|
|
}
|
|
END_CATCH
|
|
}
|
|
END_CATCH
|
|
}
|
|
|
|
/* The "set record btrace" command. */
|
|
|
|
static void
|
|
cmd_set_record_btrace (char *args, int from_tty)
|
|
{
|
|
cmd_show_list (set_record_btrace_cmdlist, from_tty, "");
|
|
}
|
|
|
|
/* The "show record btrace" command. */
|
|
|
|
static void
|
|
cmd_show_record_btrace (char *args, int from_tty)
|
|
{
|
|
cmd_show_list (show_record_btrace_cmdlist, from_tty, "");
|
|
}
|
|
|
|
/* The "show record btrace replay-memory-access" command. */
|
|
|
|
static void
|
|
cmd_show_replay_memory_access (struct ui_file *file, int from_tty,
|
|
struct cmd_list_element *c, const char *value)
|
|
{
|
|
fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"),
|
|
replay_memory_access);
|
|
}
|
|
|
|
/* The "set record btrace bts" command. */
|
|
|
|
static void
|
|
cmd_set_record_btrace_bts (char *args, int from_tty)
|
|
{
|
|
printf_unfiltered (_("\"set record btrace bts\" must be followed "
|
|
"by an appropriate subcommand.\n"));
|
|
help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ",
|
|
all_commands, gdb_stdout);
|
|
}
|
|
|
|
/* The "show record btrace bts" command. */
|
|
|
|
static void
|
|
cmd_show_record_btrace_bts (char *args, int from_tty)
|
|
{
|
|
cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, "");
|
|
}
|
|
|
|
/* The "set record btrace pt" command. */
|
|
|
|
static void
|
|
cmd_set_record_btrace_pt (char *args, int from_tty)
|
|
{
|
|
printf_unfiltered (_("\"set record btrace pt\" must be followed "
|
|
"by an appropriate subcommand.\n"));
|
|
help_list (set_record_btrace_pt_cmdlist, "set record btrace pt ",
|
|
all_commands, gdb_stdout);
|
|
}
|
|
|
|
/* The "show record btrace pt" command. */
|
|
|
|
static void
|
|
cmd_show_record_btrace_pt (char *args, int from_tty)
|
|
{
|
|
cmd_show_list (show_record_btrace_pt_cmdlist, from_tty, "");
|
|
}
|
|
|
|
/* The "record bts buffer-size" show value function. */
|
|
|
|
static void
|
|
show_record_bts_buffer_size_value (struct ui_file *file, int from_tty,
|
|
struct cmd_list_element *c,
|
|
const char *value)
|
|
{
|
|
fprintf_filtered (file, _("The record/replay bts buffer size is %s.\n"),
|
|
value);
|
|
}
|
|
|
|
/* The "record pt buffer-size" show value function. */
|
|
|
|
static void
|
|
show_record_pt_buffer_size_value (struct ui_file *file, int from_tty,
|
|
struct cmd_list_element *c,
|
|
const char *value)
|
|
{
|
|
fprintf_filtered (file, _("The record/replay pt buffer size is %s.\n"),
|
|
value);
|
|
}
|
|
|
|
void _initialize_record_btrace (void);
|
|
|
|
/* Initialize btrace commands. */
|
|
|
|
void
|
|
_initialize_record_btrace (void)
|
|
{
|
|
add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start,
|
|
_("Start branch trace recording."), &record_btrace_cmdlist,
|
|
"record btrace ", 0, &record_cmdlist);
|
|
add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist);
|
|
|
|
add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start,
|
|
_("\
|
|
Start branch trace recording in Branch Trace Store (BTS) format.\n\n\
|
|
The processor stores a from/to record for each branch into a cyclic buffer.\n\
|
|
This format may not be available on all processors."),
|
|
&record_btrace_cmdlist);
|
|
add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist);
|
|
|
|
add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start,
|
|
_("\
|
|
Start branch trace recording in Intel(R) Processor Trace format.\n\n\
|
|
This format may not be available on all processors."),
|
|
&record_btrace_cmdlist);
|
|
add_alias_cmd ("pt", "btrace pt", class_obscure, 1, &record_cmdlist);
|
|
|
|
add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace,
|
|
_("Set record options"), &set_record_btrace_cmdlist,
|
|
"set record btrace ", 0, &set_record_cmdlist);
|
|
|
|
add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace,
|
|
_("Show record options"), &show_record_btrace_cmdlist,
|
|
"show record btrace ", 0, &show_record_cmdlist);
|
|
|
|
add_setshow_enum_cmd ("replay-memory-access", no_class,
|
|
replay_memory_access_types, &replay_memory_access, _("\
|
|
Set what memory accesses are allowed during replay."), _("\
|
|
Show what memory accesses are allowed during replay."),
|
|
_("Default is READ-ONLY.\n\n\
|
|
The btrace record target does not trace data.\n\
|
|
The memory therefore corresponds to the live target and not \
|
|
to the current replay position.\n\n\
|
|
When READ-ONLY, allow accesses to read-only memory during replay.\n\
|
|
When READ-WRITE, allow accesses to read-only and read-write memory during \
|
|
replay."),
|
|
NULL, cmd_show_replay_memory_access,
|
|
&set_record_btrace_cmdlist,
|
|
&show_record_btrace_cmdlist);
|
|
|
|
add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts,
|
|
_("Set record btrace bts options"),
|
|
&set_record_btrace_bts_cmdlist,
|
|
"set record btrace bts ", 0, &set_record_btrace_cmdlist);
|
|
|
|
add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts,
|
|
_("Show record btrace bts options"),
|
|
&show_record_btrace_bts_cmdlist,
|
|
"show record btrace bts ", 0, &show_record_btrace_cmdlist);
|
|
|
|
add_setshow_uinteger_cmd ("buffer-size", no_class,
|
|
&record_btrace_conf.bts.size,
|
|
_("Set the record/replay bts buffer size."),
|
|
_("Show the record/replay bts buffer size."), _("\
|
|
When starting recording request a trace buffer of this size. \
|
|
The actual buffer size may differ from the requested size. \
|
|
Use \"info record\" to see the actual buffer size.\n\n\
|
|
Bigger buffers allow longer recording but also take more time to process \
|
|
the recorded execution trace.\n\n\
|
|
The trace buffer size may not be changed while recording."), NULL,
|
|
show_record_bts_buffer_size_value,
|
|
&set_record_btrace_bts_cmdlist,
|
|
&show_record_btrace_bts_cmdlist);
|
|
|
|
add_prefix_cmd ("pt", class_support, cmd_set_record_btrace_pt,
|
|
_("Set record btrace pt options"),
|
|
&set_record_btrace_pt_cmdlist,
|
|
"set record btrace pt ", 0, &set_record_btrace_cmdlist);
|
|
|
|
add_prefix_cmd ("pt", class_support, cmd_show_record_btrace_pt,
|
|
_("Show record btrace pt options"),
|
|
&show_record_btrace_pt_cmdlist,
|
|
"show record btrace pt ", 0, &show_record_btrace_cmdlist);
|
|
|
|
add_setshow_uinteger_cmd ("buffer-size", no_class,
|
|
&record_btrace_conf.pt.size,
|
|
_("Set the record/replay pt buffer size."),
|
|
_("Show the record/replay pt buffer size."), _("\
|
|
Bigger buffers allow longer recording but also take more time to process \
|
|
the recorded execution.\n\
|
|
The actual buffer size may differ from the requested size. Use \"info record\" \
|
|
to see the actual buffer size."), NULL, show_record_pt_buffer_size_value,
|
|
&set_record_btrace_pt_cmdlist,
|
|
&show_record_btrace_pt_cmdlist);
|
|
|
|
init_record_btrace_ops ();
|
|
add_target (&record_btrace_ops);
|
|
|
|
bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL,
|
|
xcalloc, xfree);
|
|
|
|
record_btrace_conf.bts.size = 64 * 1024;
|
|
record_btrace_conf.pt.size = 16 * 1024;
|
|
}
|