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From "Ilya Berezhniuk (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-5379) [drlvm][signals] Several crash handler improvements
Date Fri, 11 Jan 2008 12:27:34 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-5379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12557971#action_12557971

Ilya Berezhniuk commented on HARMONY-5379:

Thanks a lot, Alexey!
I'll fix all 3 points and provide an updated patch.

(3) is simply because in the beginning these files resided in a single directory :)

> [drlvm][signals] Several crash handler improvements
> ---------------------------------------------------
>                 Key: HARMONY-5379
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5379
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>         Environment: All
>            Reporter: Ilya Berezhniuk
>         Attachments: H-5379.patch
> Together with unifying signal handlers in HARMONY-5366, I've made some improvements in
crash handler.
> The patch is in attachment.
> Following features were added:
> - when one thread is in crash handler, other threads are blocked to prevent from printing
several stack traces
> - processor registers are now printed on Linux also
> - analysis of crashed address:
>     - a module containing crashed address is identified
>     - detected module kind: VM module / JNI library / other
>     - if crash address does not belong to any module, containing memory region is identified;
access information is provided
> - the whole table of loaded modules is printed
> - the list of threads registeret to VM is printed with crashed thread marked
> - heap usage in crash handler was reduced to be sure that at least some kind of info
will be printed (if global heap lock is not released)
> I'm also working on some new heuristics to improve native stack unwinding on x86_64,
but this work is not finished yet, so I'll prove it in additional patch.

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