I'll try to reproduce it next week. Отправлено с помощью BlueMail
На 30 Апр 2018 г., 17:20, в 17:20, Ciro Santilli <ciro.santi...@gmail.com> написал:п>Did you manage to reproduce and solve the savevm and loadvm problems I >mentioned at: >http://lists.nongnu.org/archive/html/qemu-devel/2018-04/msg05219.html >? > >I still observe them on the current patch. > >On Sat, Apr 28, 2018 at 1:36 PM, Pavel Dovgalyuk ><pavel.dovga...@ispras.ru> wrote: >> GDB remote protocol supports reverse debugging of the targets. >> It includes 'reverse step' and 'reverse continue' operations. >> The first one finds the previous step of the execution, >> and the second one is intended to stop at the last breakpoint that >> would happen when the program is executed normally. >> >> Reverse debugging is possible in the replay mode, when at least >> one snapshot was created at the record or replay phase. >> QEMU can use these snapshots for travelling back in time with GDB. >> >> Running the execution in replay mode allows using GDB reverse >debugging >> commands: >> - reverse-stepi (or rsi): Steps one instruction to the past. >> QEMU loads on of the prior snapshots and proceeds to the desired >> instruction forward. When that step is reaches, execution stops. >> - reverse-continue (or rc): Runs execution "backwards". >> QEMU tries to find breakpoint or watchpoint by loaded prior >snapshot >> and replaying the execution. Then QEMU loads snapshots again and >> replays to the latest breakpoint. When there are no breakpoints in >> the examined section of the execution, QEMU finds one more >snapshot >> and tries again. After the first snapshot is processed, execution >> stops at this snapshot. >> >> The set of patches include the following modifications: >> - gdbstub update for reverse debugging support >> - functions that automatically perform reverse step and reverse >> continue operations >> - hmp/qmp commands for manipulating the replay process >> - improvement of the snapshotting for saving the execution step >> in the snapshot parameters >> - other record/replay fixes >> >> The patches are available in the repository: >> https://github.com/ispras/qemu/tree/rr-180428 >> >> v2 changes: >> - documented reverse debugging >> - fixed start vmstate loading in record mode >> - documented qcow2 changes (as suggested by Eric Blake) >> - made icount SnapshotInfo field optional (as suggested by Eric >Blake) >> - renamed qmp commands (as suggested by Eric Blake) >> - minor changes >> >> --- >> >> Pavel Dovgalyuk (19): >> block: implement bdrv_snapshot_goto for blkreplay >> replay: disable default snapshot for record/replay >> replay: update docs for record/replay with block devices >> replay: don't drain/flush bdrv queue while RR is working >> replay: finish record/replay before closing the disks >> qcow2: introduce icount field for snapshots >> migration: introduce icount field for snapshots >> replay: introduce info hmp/qmp command >> replay: introduce breakpoint at the specified step >> replay: implement replay-seek command to proceed to the desired >step >> replay: flush events when exitting >> timer: remove replay clock probe in deadline calculation >> replay: refine replay-time module >> translator: fix breakpoint processing >> replay: flush rr queue before loading the vmstate >> gdbstub: add reverse step support in replay mode >> gdbstub: add reverse continue support in replay mode >> replay: describe reverse debugging in docs/replay.txt >> replay: allow loading any snapshots before recording >> >> >> accel/tcg/translator.c | 8 + >> block/blkreplay.c | 8 + >> block/io.c | 22 +++ >> block/qapi.c | 17 ++- >> block/qcow2-snapshot.c | 9 + >> block/qcow2.h | 2 >> blockdev.c | 10 ++ >> cpus.c | 19 ++- >> docs/interop/qcow2.txt | 4 + >> docs/replay.txt | 45 +++++++ >> exec.c | 6 + >> gdbstub.c | 50 +++++++- >> hmp-commands-info.hx | 14 ++ >> hmp-commands.hx | 30 +++++ >> hmp.h | 3 >> include/block/snapshot.h | 1 >> include/sysemu/replay.h | 18 +++ >> migration/savevm.c | 15 +- >> qapi/block-core.json | 5 + >> qapi/block.json | 3 >> qapi/misc.json | 68 +++++++++++ >> replay/Makefile.objs | 3 >> replay/replay-debugging.c | 287 >+++++++++++++++++++++++++++++++++++++++++++++ >> replay/replay-events.c | 14 -- >> replay/replay-internal.h | 10 +- >> replay/replay-snapshot.c | 17 ++- >> replay/replay-time.c | 27 ++-- >> replay/replay.c | 22 +++ >> stubs/replay.c | 10 ++ >> util/qemu-timer.c | 11 -- >> vl.c | 18 ++- >> 31 files changed, 695 insertions(+), 81 deletions(-) >> create mode 100644 replay/replay-debugging.c >> >> -- >> Pavel Dovgalyuk