From: Frederic Konrad <fred.konrad@greensocs.com>
To: Pavel Dovgaluk <Pavel.Dovgaluk@ispras.ru>,
'QEMU Developers' <qemu-devel@nongnu.org>
Cc: 'Paolo Bonzini' <pbonzini@redhat.com>,
'Peter Crosthwaite' <peter.crosthwaite@xilinx.com>,
'Mark Burton' <mark.burton@greensocs.com>,
'Peter Maydell' <peter.maydell@linaro.org>
Subject: Re: [Qemu-devel] [RFC PATCH 00/22] Reverse execution and deterministic replay
Date: Tue, 01 Jul 2014 14:40:38 +0200 [thread overview]
Message-ID: <53B2AC46.8050402@greensocs.com> (raw)
In-Reply-To: <007401cf951e$0c5bbd10$25133730$@Dovgaluk@ispras.ru>
Hi Pavel,
Thanks for sharing.
I'll take a look at your patch-set.
I suggest you try the icount mechanism and I think it might be
interesting to
combine our work to have a complete solution and to avoid double copy
patches
(for example command lines, gdb stub and the snapshot mechanism).
I'll provides the last updates today or tomorrow.
Also do you have any git tree somewhere so it is easier for us to test it?
I recommand you to use git send-email to submit your patches so you can CC
people and the patch set won't be cutted by other patches in the mailing
list.
Thanks,
Fred
On 01/07/2014 13:17, Pavel Dovgaluk wrote:
> Hi,
>
> This set of patches is related to the reverse execution and deterministic
> replay of qemu execution Our implementation of replay can be used for
> deterministic and reverse debugging of guest code through gdb
> remote interface.
>
> Execution recording writes non-deterministic events log, which can be later
> used for replaying the execution anywhere and for unlimited number of times.
> It also supports checkpointing for faster rewinding during reverse debugging.
> Execution replaying reads the log and replays all non-deterministic events
> including external input, hardware clocks, and interrupts.
>
> Reverse execution has the following features:
> * Deterministically replays whole system execution and all contents of the memory,
> state of the hadrware devices, clocks, and screen of the VM.
> * Writes execution log into the file for latter replaying for multiple times
> on different machines.
> * Supports i386, x86_64, and ARM hardware platforms.
> * Performs deterministic replay of all operations with keyboard, mouse, network adapters,
> audio devices, serial interfaces, and physical USB devices connected to the emulator.
> * Provides support for gdb reverse debugging commands like reverse-step and reverse-continue.
> * Supports auto-checkpointing for convenient reverse debugging.
> * Allows "going to the live execution" from the replay mode.
>
> Usage of the record/replay:
> * First, record the execution, by adding '-record fname=replay.bin' to the
> command line.
> * Then you can replay it for the multiple times by using another command
> line option: '-replay fname=replay.bin'
> * Virtual machine should have at least one virtual disk, which is used to
> store checkpoints. If you want to enable automatic checkpointing, simply
> add ',period=XX' to record options, where XX is the checkpointing period
> in seconds.
> * Using of the network adapters in record/replay mode is possible with
> the following command-line options:
> - '-net user' (or another host adapter) in record mode
> - '-net replay' in replay mode. Every host network adapter should be
> replaced by 'replay' when replaying the execution.
> * Reverse debugging can be used through gdb remote interface.
> reverse-stepi and reverse-continue commands are supported. Other reverse
> commands should also work, because they reuse these ones.
> * Monitor is extended by the following commands:
> - replay_info - prints information about replay mode and current step
> (number of instructions executed)
> - replay_break - sets "breakpoint" at the specified instructions count.
> - replay_seek - rewinds (using the checkpoints, if possible) to the
> specified step of replay log.
> - replay_events - prints list of the external events like network packet
> input, or keyboard and mouse input.
>
> Paper with short description of deterministic replay implementation:
> http://www.computer.org/csdl/proceedings/csmr/2012/4666/00/4666a553-abs.html
>
>
> Makefile.target | 3 +
> arch_init.c | 9 +
> async.c | 50 +-
> audio/audio.c | 10 +-
> audio/winwaveaudio.c | 171 +++-
> block.c | 139 +++-
> block/blkdebug.c | 2 +-
> block/blkverify.c | 4 +-
> block/cow.c | 2 +-
> block/qcow.c | 2 +-
> block/qcow2.c | 13 +-
> block/qed.c | 2 +-
> block/raw-posix.c | 5 +-
> block/raw-win32.c | 8 +-
> block/vmdk.c | 8 +-
> block/vvfat.c | 3 +-
> block/win32-aio.c | 2 +
> blockdev.c | 23 +-
> cpu-exec.c | 73 ++-
> cpus.c | 151 +++-
> dma-helpers.c | 15 +-
> exec.c | 19 +
> gdbstub.c | 79 ++-
> hmp-commands.hx | 101 +++
> hw/acpi/core.c | 7 +-
> hw/arm/integratorcp.c | 38 +-
> hw/audio/pcspk.c | 19 +-
> hw/block/fdc.c | 11 +-
> hw/block/virtio-blk.c | 8 +-
> hw/char/parallel.c | 22 +
> hw/char/serial.c | 132 ++-
> hw/display/vga.c | 6 +-
> hw/i386/kvmvapic.c | 30 +-
> hw/ide/ahci.c | 10 +-
> hw/ide/atapi.c | 5 +-
> hw/ide/core.c | 19 +-
> hw/ide/pci.c | 10 +
> hw/input/pckbd.c | 3 +-
> hw/intc/apic_common.c | 5 +-
> hw/net/rtl8139.c | 5 +-
> hw/pci-host/piix.c | 22 +-
> hw/timer/arm_timer.c | 2 +-
> hw/timer/hpet.c | 9 +-
> hw/timer/mc146818rtc.c | 17 +-
> hw/timer/pl031.c | 32 +-
> hw/usb/core.c | 6 +-
> hw/usb/hcd-uhci.c | 2 +-
> hw/usb/host-libusb.c | 518 ++++++++----
> include/block/aio.h | 9 +
> include/block/block.h | 21 +-
> include/block/thread-pool.h | 60 ++-
> include/exec/cpu-defs.h | 1 +
> include/exec/cpu_ldst_template.h | 28 +-
> include/exec/exec-all.h | 38 +-
> include/exec/gen-icount.h | 7 +
> include/hw/char/serial.h | 2 +-
> include/hw/host-libusb.h | 103 +++
> include/hw/usb.h | 3 +
> include/migration/vmstate.h | 13 +
> include/monitor/monitor.h | 1 +
> include/qemu-common.h | 3 +
> include/qemu/main-loop.h | 1 +
> include/qemu/timer.h | 54 ++-
> include/qom/cpu.h | 4 +
> include/sysemu/char.h | 4 +
> include/sysemu/cpus.h | 3 +
> include/sysemu/sysemu.h | 2 +
> include/ui/input.h | 2 +
> main-loop.c | 13 +
> monitor.c | 139 +++
> net/Makefile.objs | 2 +-
> net/clients.h | 4 +
> net/dump.c | 6 +
> net/hub.c | 1 +
> net/net-replay.c | 56 ++
> net/net.c | 9 +-
> net/slirp.c | 14 +-
> net/socket.c | 40 +-
> net/tap-win32.c | 19 +-
> net/tap.c | 24 +-
> net/vde.c | 14 +-
> qapi-schema.json | 10 +
> qemu-char.c | 103 ++-
> qemu-img.c | 6 +-
> qemu-io-cmds.c | 2 +-
> qemu-io.c | 4 +-
> qemu-nbd.c | 2 +-
> qemu-options.hx | 32 +
> qemu-timer.c | 49 +-
> replay/Makefile.objs | 1 +
> replay/replay-audio.c | 238 ++++++
> replay/replay-char.c | 119 +++
> replay/replay-debug.c | 152 ++++
> replay/replay-events.c | 463 ++++++++++
> replay/replay-icount.c | 112 +++
> replay/replay-input.c | 152 ++++
> replay/replay-internal.c | 176 ++++
> replay/replay-internal.h | 192 +++++
> replay/replay-net.c | 367 ++++++++
> replay/replay-usb.c | 241 ++++++
> replay/replay.c | 1604 +++++++++++++++++++++++++++++++++++
> replay/replay.h | 249 ++++++
> roms/openbios | 2 +-
> roms/qemu-palcode | 2 +-
> roms/seabios | 2 +-
> roms/vgabios | 2 +-
> savevm.c | 31 +-
> slirp/slirp.c | 7 +-
> softmmu_template.h | 18 +
> stubs/Makefile.objs | 1 +
> stubs/replay.c | 72 ++
> stubs/vmstate.c | 3 +
> target-arm/helper.h | 4 +
> target-arm/machine.c | 4 +
> target-arm/op_helper.c | 55 ++
> target-arm/translate.c | 109 +++-
> target-i386/Makefile.objs | 2 +-
> target-i386/cpu.c | 1 +
> target-i386/cpu.h | 10 +
> target-i386/fpu_helper.c | 31 +-
> target-i386/helper.c | 2 +
> target-i386/helper.h | 8 +
> target-i386/machine.c | 5 +
> target-i386/misc_helper.c | 13 +-
> target-i386/replay_helper.c | 81 ++
> target-i386/seg_helper.c | 1 +
> target-i386/shift_helper_template.h | 14 +-
> target-i386/translate.c | 152 +++-
> tests/test-thread-pool.c | 6 +-
> thread-pool.c | 101 +--
> translate-all.c | 28 +-
> ui/input.c | 77 ++-
> util/iov.c | 4 +
> vl.c | 159 ++++-
> vmstate.c | 6 +
> 136 files changed, 7168 insertions(+), 651 deletions(-)
>
> Pavel Dovgalyuk
>
next prev parent reply other threads:[~2014-07-01 12:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-01 11:17 [Qemu-devel] [RFC PATCH 00/22] Reverse execution and deterministic replay Pavel Dovgaluk
2014-07-01 12:40 ` Frederic Konrad [this message]
2014-07-01 13:11 ` Vasily Eefimov
2014-07-01 13:26 ` Frederic Konrad
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