| Message ID | 20190117073649.5399.97670.stgit@pasha-VirtualBox (mailing list archive) |
|---|---|
| Headers | show |
| Series | Fixing record/replay and adding reverse debugging | expand |
Patchew URL: https://patchew.org/QEMU/20190117073649.5399.97670.stgit@pasha-VirtualBox/ Hi, This series seems to have some coding style problems. See output below for more information: Subject: [Qemu-devel] [PATCH v10 00/24] Fixing record/replay and adding reverse debugging Type: series Message-id: 20190117073649.5399.97670.stgit@pasha-VirtualBox === TEST SCRIPT BEGIN === #!/bin/bash git config --local diff.renamelimit 0 git config --local diff.renames True git config --local diff.algorithm histogram ./scripts/checkpatch.pl --mailback base.. === TEST SCRIPT END === Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384 Switched to a new branch 'test' 7049f80fc1 replay: rename step-related variables and functions 5eac81343e replay: fix replay shutdown a747dc45e5 util/qemu-timer: refactor deadline calculation for external timers 5c5205178f replay: document development rules b65f9e291f replay: init rtc after enabling the replay a778d9ee8d replay: add BH oneshot event for block layer d858309da1 replay: describe reverse debugging in docs/replay.txt 991916fcd5 gdbstub: add reverse continue support in replay mode febeb64b34 gdbstub: add reverse step support in replay mode bebb4134ef replay: flush rr queue before loading the vmstate 60699046ba replay: refine replay-time module 0972845ea5 replay: implement replay-seek command 34bf0280a3 replay: introduce breakpoint at the specified step 936ac99625 replay: introduce info hmp/qmp command fb0fb9065e qapi: introduce replay.json for record/replay-related stuff ceb76bedb5 replay: provide an accessor for rr filename d6f41bb599 migration: introduce icount field for snapshots 5960b29c24 qcow2: introduce icount field for snapshots 70139c618c replay: finish record/replay before closing the disks 5e12f930b3 replay: don't drain/flush bdrv queue while RR is working 3b0e839a97 replay: update docs for record/replay with block devices dc9eb62cc0 replay: disable default snapshot for record/replay d89d015ba0 block: implement bdrv_snapshot_goto for blkreplay 10258d7cd0 replay: add missing fix for internal function === OUTPUT BEGIN === 1/24 Checking commit 10258d7cd080 (replay: add missing fix for internal function) 2/24 Checking commit d89d015ba072 (block: implement bdrv_snapshot_goto for blkreplay) 3/24 Checking commit dc9eb62cc084 (replay: disable default snapshot for record/replay) 4/24 Checking commit 3b0e839a97dd (replay: update docs for record/replay with block devices) 5/24 Checking commit 5e12f930b330 (replay: don't drain/flush bdrv queue while RR is working) 6/24 Checking commit 70139c618c2c (replay: finish record/replay before closing the disks) 7/24 Checking commit 5960b29c24e4 (qcow2: introduce icount field for snapshots) 8/24 Checking commit d6f41bb59907 (migration: introduce icount field for snapshots) 9/24 Checking commit ceb76bedb566 (replay: provide an accessor for rr filename) 10/24 Checking commit fb0fb9065eef (qapi: introduce replay.json for record/replay-related stuff) WARNING: added, moved or deleted file(s), does MAINTAINERS need updating? #97: new file mode 100644 total: 0 errors, 1 warnings, 78 lines checked Patch 10/24 has style problems, please review. If any of these errors are false positives report them to the maintainer, see CHECKPATCH in MAINTAINERS. 11/24 Checking commit 936ac996257c (replay: introduce info hmp/qmp command) WARNING: added, moved or deleted file(s), does MAINTAINERS need updating? #142: new file mode 100644 total: 0 errors, 1 warnings, 127 lines checked Patch 11/24 has style problems, please review. If any of these errors are false positives report them to the maintainer, see CHECKPATCH in MAINTAINERS. 12/24 Checking commit 34bf0280a37e (replay: introduce breakpoint at the specified step) 13/24 Checking commit 0972845ea59e (replay: implement replay-seek command) ERROR: "foo* bar" should be "foo *bar" #118: FILE: replay/replay-debugging.c:134: + int64_t* snapshot_icount) total: 1 errors, 0 warnings, 155 lines checked Patch 13/24 has style problems, please review. If any of these errors are false positives report them to the maintainer, see CHECKPATCH in MAINTAINERS. 14/24 Checking commit 60699046ba21 (replay: refine replay-time module) 15/24 Checking commit bebb4134ef18 (replay: flush rr queue before loading the vmstate) 16/24 Checking commit febeb64b34b3 (gdbstub: add reverse step support in replay mode) 17/24 Checking commit 991916fcd522 (gdbstub: add reverse continue support in replay mode) 18/24 Checking commit d858309da1bc (replay: describe reverse debugging in docs/replay.txt) 19/24 Checking commit a778d9ee8d3b (replay: add BH oneshot event for block layer) WARNING: added, moved or deleted file(s), does MAINTAINERS need updating? #316: new file mode 100644 total: 0 errors, 1 warnings, 224 lines checked Patch 19/24 has style problems, please review. If any of these errors are false positives report them to the maintainer, see CHECKPATCH in MAINTAINERS. 20/24 Checking commit b65f9e291f15 (replay: init rtc after enabling the replay) 21/24 Checking commit 5c5205178f60 (replay: document development rules) WARNING: added, moved or deleted file(s), does MAINTAINERS need updating? #18: new file mode 100644 total: 0 errors, 1 warnings, 46 lines checked Patch 21/24 has style problems, please review. If any of these errors are false positives report them to the maintainer, see CHECKPATCH in MAINTAINERS. 22/24 Checking commit a747dc45e5bd (util/qemu-timer: refactor deadline calculation for external timers) 23/24 Checking commit 5eac81343e93 (replay: fix replay shutdown) 24/24 Checking commit 7049f80fc128 (replay: rename step-related variables and functions) WARNING: line over 80 characters #117: FILE: replay/replay-debugging.c:246: + replay_seek(replay_get_current_icount() - 1, replay_stop_vm_debug, &err); total: 0 errors, 1 warnings, 282 lines checked Patch 24/24 has style problems, please review. If any of these errors are false positives report them to the maintainer, see CHECKPATCH in MAINTAINERS. === OUTPUT END === Test command exited with code: 1 The full log is available at http://patchew.org/logs/20190117073649.5399.97670.stgit@pasha-VirtualBox/testing.checkpatch/?type=message. --- Email generated automatically by Patchew [http://patchew.org/]. Please send your feedback to patchew-devel@redhat.com
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-190117 v10 changes: - added patch for correct deadline calculation with external timers - updated icount-related documentation in json files (suggested by Markus Armbruster) - fixed replay shutdown - renamed some functions and variables to make them consistent with the documentation and displayed messages - minor changes v9 changes: - moved rr qapi stuff to the separate file (suggested by Markus Armbruster) - minor coding style fixes v8 changes: - rebased to the new master - added missing fix for prior rr patch - updated 'since' version number in json-related patches v7 changes: - rebased to the new master with upstreamed patches from the series - several improvements in hmp/qmp commands handling (suggested by Markus Armbruster) - fixed record/replay with '-rtc base' option enabled - added document with virtual hardware requirements v6 changes: - rebased to the new version of master - fixed build of linux-user configurations - added new clock for slirp and vnc timers v5 changes: - multiple fixes of record/replay bugs appeared after QEMU core update - changed reverse debugging to 'since 3.1' v4 changes: - changed 'since 2.13' to 'since 3.0' in json (as suggested by Eric Blake) v3 changes: - Fixed PS/2 bug with save/load vm, which caused failures of the replay. - Rebased to the new code base. - Minor fixes. 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 (23): 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: provide an accessor for rr filename qapi: introduce replay.json for record/replay-related stuff replay: introduce info hmp/qmp command replay: introduce breakpoint at the specified step replay: implement replay-seek command replay: refine replay-time module 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: add BH oneshot event for block layer replay: init rtc after enabling the replay replay: document development rules util/qemu-timer: refactor deadline calculation for external timers replay: fix replay shutdown replay: rename step-related variables and functions pbonzini@redhat.com (1): replay: add missing fix for internal function MAINTAINERS | 1 Makefile.objs | 4 - accel/tcg/translator.c | 1 block/blkreplay.c | 8 + block/block-backend.c | 8 + block/io.c | 32 ++++ block/iscsi.c | 5 - block/nfs.c | 5 - block/null.c | 4 - block/nvme.c | 6 + block/qapi.c | 18 ++ block/qcow2-snapshot.c | 9 + block/qcow2.h | 2 block/rbd.c | 5 - block/vxhs.c | 5 - blockdev.c | 10 + cpus.c | 30 +++- docs/devel/replay.txt | 46 ++++++ docs/interop/qcow2.txt | 4 + docs/replay.txt | 45 ++++++ exec.c | 8 + gdbstub.c | 52 +++++++ hmp-commands-info.hx | 14 ++ hmp-commands.hx | 53 +++++++ hmp.h | 4 + include/block/snapshot.h | 1 include/qemu/timer.h | 7 - include/sysemu/replay.h | 30 ++++ migration/savevm.c | 11 ++ qapi/block-core.json | 8 + qapi/block.json | 3 qapi/misc.json | 18 -- qapi/qapi-schema.json | 1 qapi/replay.json | 121 +++++++++++++++++ qtest.c | 2 replay/Makefile.objs | 3 replay/replay-debugging.c | 326 +++++++++++++++++++++++++++++++++++++++++++++ replay/replay-events.c | 18 ++ replay/replay-internal.c | 10 + replay/replay-internal.h | 17 +- replay/replay-snapshot.c | 6 - replay/replay-time.c | 36 ++--- replay/replay.c | 56 ++++++-- stubs/Makefile.objs | 1 stubs/replay-user.c | 9 + stubs/replay.c | 10 + tests/ptimer-test-stubs.c | 2 tests/ptimer-test.c | 4 - util/qemu-timer.c | 41 +++++- vl.c | 21 ++- 50 files changed, 1007 insertions(+), 134 deletions(-) create mode 100644 docs/devel/replay.txt create mode 100644 qapi/replay.json create mode 100644 replay/replay-debugging.c create mode 100644 stubs/replay-user.c