[llvm-dev] JIT and atexit crash (original) (raw)

Nikodemus Siivola via llvm-dev llvm-dev at lists.llvm.org
Tue Nov 21 05:20:52 PST 2017

Transform the atexit into equivalent code you can control, run it before the destructors of the JIT engine run?

On Tue, Nov 21, 2017 at 12:13 PM, Alex Denisov via llvm-dev < llvm-dev at lists.llvm.org> wrote:

> It's not the job of the Orc engine.

I could argue about this, but I won’t :) > Just don't use atexit. The problem is that I run third-party programs. I cannot control them. > On 20. Nov 2017, at 01:04, Joerg Sonnenberger via llvm-dev <_ _llvm-dev at lists.llvm.org> wrote: > > On Mon, Nov 20, 2017 at 12:22:49AM +0100, Alex Denisov via llvm-dev wrote: >> JIT allocates and maps some memory for the execution. Some function X at address 0xdeadbeef is part of this memory. >> JIT calls a code that passes the X to atexit. >> JIT deallocates and unmaps the memory used for execution (either via objectLayer.removeObjectSet or by calling JIT's destructors) >> atexit (cxafinalizeranges) calls the X at 0xdeadbeef which does not belong to 'us' anymore, which leads to the crash. > > Sounds plausible. > >> Given that my assumption is correct what can we do about this? Is there >> anything that can be done to cover this case inside of the Orc engine? > > It's not the job of the Orc engine. Just don't use atexit. > > Joerg _> ________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

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