[llvm-dev] Adding source location information to crash dumps

Yaron Keren via llvm-dev
Sat, 04 Jun 2016 18:05:57 -0000

We use creduce to reduce large crash code to a small example,
https://embed.cs.utah.edu/creduce/
Then you can run clang under a debugger compiling the small example and
actually understand the crash.

2016-06-04 13:27 GMT+03:00 Martin J. O'Riordan via llvm-dev <
llvm-dev at lists.llvm.org>:

> Awful though it may seem, we sometimes do get crashes in the compiler,
> usually because of some unhandled scenario we never thought of.
> Unfortunately this typically happens when compiling very large pieces of
> code, so narrowing down the context of the crash can be difficult.
>
>
>
> When CLang/LLVM crashes it very helpfully creates a temporary
> pre-processed file along with a shell script to run this file so the issue
> can be reproduced.  And when run there is (usually) a call-stack dump,
> particularly when the Debug build is run.
>
>
>
> But I would also like to have a clue about what file and line in the
> test-case corresponds to the context in which the crash occurs.  Is there
> any easy way of adding the ability to write the ‘DebugLoc’ information
> corresponding to the context or the crash, or is this information not
> available to the crash-handler?
>
>
>
> Thanks,
>
>
>
>             MartinO
>
>
>
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>
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