Accidentally sent draft version of patches to the mailing list. Please consider this one as the correct one.
This set of patches includex fixes from Alex Bennée for fixing BQL and replay locks after inventing the MTTCG. It also includes some additional replay patches that makes this set of fixes working. It is also fixes some vmstate creation (and loading) issues in record/replay modes: - VM start/stop fixes in replay mode - overlay creation for blkreplay filter - fixes for vmstate save/load in record/replay mode - fixes for host clock vmstate - fixes for icount timers vmstate There is also a set of helper scripts written by Alex Bennée for debugging the record/replay code. v3 changes: - removed upstreamed patches - fixed bug with recursive checkpoints - fixed bug with icount warp checkpoint v2 changes: - updated lock/unlock logic (as suggested by Paolo Bonzini) - updated cpu execution loop to avoid races in setting/resetting exit request (as suggested by Paolo Bonzini) - minor changes --- Alex Bennée (12): target/arm/arm-powertctl: drop BQL assertions cpus: push BQL lock to qemu_*_wait_io_event cpus: only take BQL for sleeping threads replay/replay.c: bump REPLAY_VERSION again replay/replay-internal.c: track holding of replay_lock replay: make locking visible outside replay code replay: push replay_mutex_lock up the call tree scripts/qemu-gdb: add simple tcg lock status helper util/qemu-thread-*: add qemu_lock, locked and unlock trace events scripts/analyse-locks-simpletrace.py: script to analyse lock times scripts/replay-dump.py: replay log dumper scripts/qemu-gdb/timers.py: new helper to dump timer state Pavel Dovgalyuk (18): hpet: recover timer offset correctly cpu: flush TB cache when loading VMState This patch adds a condition before overwriting exception_index fields. block: implement bdrv_snapshot_goto for blkreplay blkreplay: create temporary overlay for underlaying devices replay: disable default snapshot for record/replay replay: fix processing async events replay: fixed replay_enable_events replay: fix save/load vm for non-empty queue replay: added replay log format description replay: make safe vmstop at record/replay replay: save prior value of the host clock icount: fixed saving/restoring of icount warp timers replay: don't destroy mutex at exit replay: check return values of fwrite replay: avoid recursive call of checkpoints replay: improve replay performance replay: don't process async events when warping the clock accel/kvm/kvm-all.c | 4 accel/tcg/cpu-exec.c | 5 - block/blkreplay.c | 73 ++++++++ cpus-common.c | 13 + cpus.c | 184 +++++++++++++++----- docs/replay.txt | 91 ++++++++++ exec.c | 1 hw/timer/hpet.c | 30 +++ include/hw/compat.h | 6 + include/qemu/thread.h | 19 ++ include/qemu/timer.h | 14 ++ include/sysemu/replay.h | 22 ++ migration/savevm.c | 13 + replay/replay-char.c | 21 +- replay/replay-events.c | 30 +-- replay/replay-internal.c | 48 +++++ replay/replay-internal.h | 9 + replay/replay-snapshot.c | 9 + replay/replay-time.c | 10 + replay/replay.c | 75 ++++++-- scripts/analyse-locks-simpletrace.py | 99 +++++++++++ scripts/qemu-gdb.py | 4 scripts/qemugdb/tcg.py | 46 +++++ scripts/qemugdb/timers.py | 54 ++++++ scripts/replay-dump.py | 308 ++++++++++++++++++++++++++++++++++ stubs/replay.c | 16 ++ target/arm/arm-powerctl.c | 8 - target/i386/hax-all.c | 2 util/main-loop.c | 17 +- util/qemu-thread-posix.c | 21 +- util/qemu-timer.c | 12 + util/trace-events | 7 - vl.c | 12 + 33 files changed, 1112 insertions(+), 171 deletions(-) create mode 100755 scripts/analyse-locks-simpletrace.py create mode 100644 scripts/qemugdb/tcg.py create mode 100644 scripts/qemugdb/timers.py create mode 100755 scripts/replay-dump.py -- Pavel Dovgalyuk