Syscall interruption mechanics

Chris Jones jones.chris.g at gmail.com
Sun Dec 14 13:00:48 PST 2014


On Sat, Dec 13, 2014 at 10:11 PM, Kyle Huey <me at kylehuey.com> wrote:

> Yes.  I recorded http://khuey.pastebin.mozilla.org/7963445.  This
> asserts during replay (but not recording) because there's no
> interrupted syscall event to pop off.  I sort of suspect this is a
> problem with PTRACE_SYSEMU on ARM, but I don't really understand what
> the expected behavior is well enough to be sure.
>
>
​That looks like a pretty straightforward case.  Is this code being hit?

https://github.com/mozilla/rr/blob/master/src/replay_syscall.cc#L1235

Cheers,
Chris
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