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| author | Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> | 2020-10-03 20:13:49 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-06 08:34:49 +0200 |
| commit | cda382594b7ea50aff5f672f32767f9f9fef4c12 (patch) | |
| tree | 9d33774ea1a44059a0a7d5e9895f5d7a3d530eba /include | |
| parent | fda8458bd3a9cb3108ba2f09921b6e3eee0d1bf3 (diff) | |
| download | qemu-cda382594b7ea50aff5f672f32767f9f9fef4c12.zip qemu-cda382594b7ea50aff5f672f32767f9f9fef4c12.tar.gz qemu-cda382594b7ea50aff5f672f32767f9f9fef4c12.tar.bz2 | |
gdbstub: add reverse continue support in replay mode
This patch adds support of the reverse continue operation for gdbstub.
Reverse continue finds the last breakpoint that would happen in normal
execution from the beginning to the current moment.
Implementation of the reverse continue replays the execution twice:
to find the breakpoints that were hit and to seek to the last breakpoint.
Reverse continue loads the previous snapshot and tries to find the breakpoint
since that moment. If there are no such breakpoints, it proceeds to
the earlier snapshot, and so on. When no breakpoints or watchpoints were
hit at all, execution stops at the beginning of the replay log.
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Message-Id: <160174522930.12451.6994758004725016836.stgit@pasha-ThinkPad-X280>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sysemu/replay.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/sysemu/replay.h b/include/sysemu/replay.h index 90bbb5d..172b20c 100644 --- a/include/sysemu/replay.h +++ b/include/sysemu/replay.h @@ -82,10 +82,18 @@ const char *replay_get_filename(void); */ bool replay_reverse_step(void); /* + * Start searching the last breakpoint/watchpoint. + * Used by gdbstub for backwards debugging. + * Returns true if the process successfully started. + */ +bool replay_reverse_continue(void); +/* * Returns true if replay module is processing * reverse_continue or reverse_step request */ bool replay_running_debug(void); +/* Called in reverse debugging mode to collect breakpoint information */ +void replay_breakpoint(void); /* Processing the instructions */ |