diff options
| author | Alex Bennée <alex.bennee@linaro.org> | 2018-02-27 12:52:42 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-03-12 16:12:50 +0100 |
| commit | a36544d34c8b7e483386d29f9716ca9f4caad9fb (patch) | |
| tree | a1682c57aa3a90ab2ff16741891773a9af0318a5 /include | |
| parent | 180d30bebeff8e3687b50bd55d44e6a5a83bc4da (diff) | |
replay: make locking visible outside replay code
The replay_mutex_lock/unlock/locked functions are now going to be used
for ensuring lock-step behaviour between the two threads. Make them
public API functions and also provide stubs for non-QEMU builds on
common paths.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20180227095242.1060.16601.stgit@pasha-VirtualBox>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sysemu/replay.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/sysemu/replay.h b/include/sysemu/replay.h index 401de12130..3ced6bc231 100644 --- a/include/sysemu/replay.h +++ b/include/sysemu/replay.h @@ -48,6 +48,19 @@ extern ReplayMode replay_mode; /* Name of the initial VM snapshot */ extern char *replay_snapshot; +/* Replay locking + * + * The locks are needed to protect the shared structures and log file + * when doing record/replay. They also are the main sync-point between + * the main-loop thread and the vCPU thread. This was a role + * previously filled by the BQL which has been busy trying to reduce + * its impact across the code. This ensures blocks of events stay + * sequential and reproducible. + */ + +void replay_mutex_lock(void); +void replay_mutex_unlock(void); + /* Replay process control functions */ /*! Enables recording or saving event log with specified parameters */ |