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Re: Help please! To track down GC trying to free an already freed object
From: |
Alan Mackenzie |
Subject: |
Re: Help please! To track down GC trying to free an already freed object. |
Date: |
Tue, 2 Apr 2019 20:46:53 +0000 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
Hello, Eli.
On Tue, Apr 02, 2019 at 22:21:26 +0300, Eli Zaretskii wrote:
> > Date: Tue, 2 Apr 2019 12:09:59 -0700
> > From: "Daniel Colascione" <address@hidden>
> > Cc: address@hidden
> >
> > rr is incredibly helpful for debugging this sort of problem. See
> > https://rr-project.org/. You can record an rr session containing the
> > crash, replay it, get to the crash, and then reverse-next, reverse-finish,
> > and reverse-continue your way through the GC, running it in reverse until
> > you find whatever it is that made mark_object on the dead object happen.
> GDB supports reverse execution as well, on some platforms.
On my GNU/Linux system, I tried to run 'reverse-next', and got the error
message:
Target multi-thread does not support this command.
. :-( I suppose I could reconfigure without multi threading, but then
the bug (which is reproducible) probably wouldn't happen in the same
place.
--
Alan Mackenzie (Nuremberg, Germany).
- Help please! To track down GC trying to free an already freed object., Alan Mackenzie, 2019/04/02
- Re: Help please! To track down GC trying to free an already freed object., Daniel Colascione, 2019/04/02
- Re: Help please! To track down GC trying to free an already freed object., Eli Zaretskii, 2019/04/02
- Re: Help please! To track down GC trying to free an already freed object.,
Alan Mackenzie <=
- Re: Help please! To track down GC trying to free an already freed object., Daniel Colascione, 2019/04/02
- Re: Help please! To track down GC trying to free an already freed object., Eli Zaretskii, 2019/04/03
- Re: Help please! To track down GC trying to free an already freed object., Alan Mackenzie, 2019/04/03
- Re: Help please! To track down GC trying to free an already freed object., Eli Zaretskii, 2019/04/03
- Re: Help please! To track down GC trying to free an already freed object., Paul Eggert, 2019/04/03
Re: Help please! To track down GC trying to free an already freed object., Alan Mackenzie, 2019/04/02