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Posted to dev@qpid.apache.org by "Andrew Stitcher (JIRA)" <ji...@apache.org> on 2016/12/06 18:35:58 UTC
[jira] [Commented] (PROTON-1371) proton::container::schedule
crashes when mixing different language versions
[ https://issues.apache.org/jira/browse/PROTON-1371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15726313#comment-15726313 ]
Andrew Stitcher commented on PROTON-1371:
-----------------------------------------
The only way to fix this issue will cause some API change.
This is necessary because the only way to fix this is to use symbol mangling to make the member functions match at link time rather than the vtable at run time.
> proton::container::schedule crashes when mixing different language versions
> ---------------------------------------------------------------------------
>
> Key: PROTON-1371
> URL: https://issues.apache.org/jira/browse/PROTON-1371
> Project: Qpid Proton
> Issue Type: Bug
> Components: cpp-binding
> Affects Versions: 0.14.0
> Reporter: Andrew Stitcher
> Assignee: Andrew Stitcher
> Priority: Blocker
> Fix For: 0.16.0
>
>
> If you have a libqpid-proton-cpp compiled with C\+\+11 and then link to it using a C\+\+03 and use the {{proton::container::schedule}} API then the application will crash. This is because there is an extra virtual function present in the middle of the C\+\+11 vtable compared to the C\+\+03 vtable. So that when used from '03 the wrong member function gets called.
> The extra member function is present because of conditional compilation dependent on the C\+\+ version doing the compilation.
> This should also be a problem the other way round too, so using a libqpid-proton-cpp compiled with C\+\+03 from C\+\+11 will cause there to be one fewer entry in the vtable, and using schedule will either get the wrong version of schedule or call an entry of the end of the vtable.
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