[llvm-dev] Bug in 3.9.0 RTDyldMemoryManager.cpp

[Lang Hames via llvm-dev]

Hi Matt,

Thanks very much for catching this. I've fixed it in r283123.

Cheers,
Lang.

On Fri, Sep 30, 2016 at 12:13 PM, Matt Godbolt via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi folks,
>
> I'm still using MCJIT (I know, I know), and I spotted a crash in exception
> handling when I moved from llvm 3.8 to llvm 3.9.  I traced it back to EH
> frames not being deregistered due to a (typo?) mistake in
> RTDyldMemoryManager.cpp:
>
>   void deregisterEHFrames(uint8_t *Addr, uint64_t LoadAddr, size_t Size)
> override {
> *    registerEHFramesInProcess(Addr, Size);*
>   }
>
> ..I overrode the function to call deregister instead of register in my own
> MemMgr and all's now well.
>
> The crash manifests itself as a seg fault when a process causes an
> exception after JITted code has been removed.
>
> Cheers,
>
> Matt
>
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>
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