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Record and replay debugging with "rr"
--client
lca
--show
lca2016
--room r4mix 10644 --force
Next: 12 Playing to lose: making sensible security decisions by assuming the worst
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Marks
Author(s):
Robert O'Callahan
Location
D4.303 Costa Theatre
Date
feb Thu 04
Days Raw Files
Start
15:40
First Raw Start
15:39
Duration
0:45:00
Offset
0:00:10
End
16:25
Last Raw End
16:34
Chapters
00:00
Total cuts_time
42 min.
https://linux.conf.au/schedule/30013/view_talk
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Debugging is expensive and not fun, especially debugging intermittent failures. rr changes that by recording Linux user-space process execution and letting you play back a recording and debug it using gdb, getting exactly the same execution as was recorded, as many times as you need. rr is used by Mozilla developers to debug Firefox, so it works on real applications. It runs on stock hardware, requires no kernel changes, and has low recording overhead (usually less than 1.5x). rr supports gdb's reverse execution features, which (combined with breakpoints and hardware data watchpoints) make debugging fast and fun. This presentation will describe how rr works, discuss some of the kernel issues that created difficulties for rr, and speculate about what we can do to make rr and related tools even better.
Comment:
production notes
2016-02-04/15_39_50.dv
Apply:
15:39:50 - 16:22:12 ( 00:42:22 )
S:
15:39:50 -
E:
16:22:12
D:
00:42:22
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vlc ~/Videos/veyepar/lca/lca2016/dv/r4mix/2016-02-04/15_39_50.dv :start-time=00.0 --audio-desync=0
Raw File
Cut List
15:39:50
seconds: 0.0
Wall: 15:39:50
Duration
00:42:22
16:22:12
seconds: 0.0
Wall: 15:39:50
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2016-02-04/16_22_11.dv
Apply:
16:22:11 - 16:34:57 ( 00:12:46 )
S:
16:22:11 -
E:
16:34:57
D:
00:12:46
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vlc ~/Videos/veyepar/lca/lca2016/dv/r4mix/2016-02-04/16_22_11.dv :start-time=00.0 --audio-desync=0
Raw File
Cut List
16:22:11
seconds: 0.0
Wall: 16:22:11
Duration
00:12:46
16:34:57
seconds: 0.0
Wall: 16:22:11
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2016-02-04/15_39_50.dv
2016-02-04/16_22_11.dv
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