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https://issues.apache.org/jira/browse/HDFS-3757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13430686#comment-13430686
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Andy Isaacson commented on HDFS-3757:
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This adds {{-rdynamic}} to the link. That means we're putting every symbol in
the dynamic symbol table, which is a pretty big hammer to improve this issue.
I don't know how this will interact with HDFS-3742 "use linker version script",
it's possible that they will conflict or one will override the other.
The {{backtrace(3)}} interface is GNU specific. This would need to be ifdeffed
I suppose?
There's no fundamental reason why symbols need to be added to the dynamic
symbol table to get symbols decoded, that's a limitation of GNU
{{<execinfo.h>}}; I am pretty sure there's a STABS interpreting backtrace
library out there. This might best be implemented as a postprocessor rather
than a library, since once you've SEGVed you might well be operating in a
busted environment (malloc might segv again, for example).
So I'm not very optimistic about the benefits of this change, it has knock-on
effects and potential risks and the upside isn't very high (although sometimes
it's incredibly helpful, to be sure!).
> libhdfs: improve native stack traces
> ------------------------------------
>
> Key: HDFS-3757
> URL: https://issues.apache.org/jira/browse/HDFS-3757
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: libhdfs
> Affects Versions: 2.2.0-alpha
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Minor
> Attachments: HDFS-3757.001.patch
>
>
> When libhdfs crashes, we often don't get very good stack traces. It would be
> nice to get a better stack trace for the thread that crashed.
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