0194749ac4
Some devices are not supported by record/replay subsystem. This patch introduces replay blocker which denies starting record/replay if such devices are included into the configuration. Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru> Message-Id: <20150917162512.8676.11367.stgit@PASHA-ISP.def.inno> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
117 lines
3.7 KiB
C
117 lines
3.7 KiB
C
#ifndef REPLAY_H
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#define REPLAY_H
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/*
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* replay.h
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*
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* Copyright (c) 2010-2015 Institute for System Programming
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* of the Russian Academy of Sciences.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include "qapi-types.h"
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#include "qapi/error.h"
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#include "qemu/typedefs.h"
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/* replay clock kinds */
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enum ReplayClockKind {
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/* host_clock */
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REPLAY_CLOCK_HOST,
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/* virtual_rt_clock */
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REPLAY_CLOCK_VIRTUAL_RT,
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REPLAY_CLOCK_COUNT
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};
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typedef enum ReplayClockKind ReplayClockKind;
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/* IDs of the checkpoints */
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enum ReplayCheckpoint {
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CHECKPOINT_CLOCK_WARP,
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CHECKPOINT_RESET_REQUESTED,
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CHECKPOINT_SUSPEND_REQUESTED,
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CHECKPOINT_CLOCK_VIRTUAL,
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CHECKPOINT_CLOCK_HOST,
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CHECKPOINT_CLOCK_VIRTUAL_RT,
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CHECKPOINT_INIT,
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CHECKPOINT_RESET,
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CHECKPOINT_COUNT
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};
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typedef enum ReplayCheckpoint ReplayCheckpoint;
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extern ReplayMode replay_mode;
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/* Replay process control functions */
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/*! Enables recording or saving event log with specified parameters */
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void replay_configure(struct QemuOpts *opts);
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/*! Initializes timers used for snapshotting and enables events recording */
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void replay_start(void);
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/*! Closes replay log file and frees other resources. */
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void replay_finish(void);
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/*! Adds replay blocker with the specified error description */
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void replay_add_blocker(Error *reason);
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/* Processing the instructions */
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/*! Returns number of executed instructions. */
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uint64_t replay_get_current_step(void);
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/*! Returns number of instructions to execute in replay mode. */
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int replay_get_instructions(void);
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/*! Updates instructions counter in replay mode. */
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void replay_account_executed_instructions(void);
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/* Interrupts and exceptions */
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/*! Called by exception handler to write or read
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exception processing events. */
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bool replay_exception(void);
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/*! Used to determine that exception is pending.
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Does not proceed to the next event in the log. */
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bool replay_has_exception(void);
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/*! Called by interrupt handlers to write or read
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interrupt processing events.
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\return true if interrupt should be processed */
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bool replay_interrupt(void);
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/*! Tries to read interrupt event from the file.
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Returns true, when interrupt request is pending */
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bool replay_has_interrupt(void);
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/* Processing clocks and other time sources */
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/*! Save the specified clock */
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int64_t replay_save_clock(ReplayClockKind kind, int64_t clock);
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/*! Read the specified clock from the log or return cached data */
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int64_t replay_read_clock(ReplayClockKind kind);
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/*! Saves or reads the clock depending on the current replay mode. */
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#define REPLAY_CLOCK(clock, value) \
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(replay_mode == REPLAY_MODE_PLAY ? replay_read_clock((clock)) \
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: replay_mode == REPLAY_MODE_RECORD \
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? replay_save_clock((clock), (value)) \
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: (value))
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/* Events */
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/*! Called when qemu shutdown is requested. */
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void replay_shutdown_request(void);
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/*! Should be called at check points in the execution.
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These check points are skipped, if they were not met.
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Saves checkpoint in the SAVE mode and validates in the PLAY mode.
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Returns 0 in PLAY mode if checkpoint was not found.
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Returns 1 in all other cases. */
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bool replay_checkpoint(ReplayCheckpoint checkpoint);
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/* Asynchronous events queue */
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/*! Disables storing events in the queue */
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void replay_disable_events(void);
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/*! Returns true when saving events is enabled */
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bool replay_events_enabled(void);
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/*! Adds bottom half event to the queue */
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void replay_bh_schedule_event(QEMUBH *bh);
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#endif
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