[llvm-dev] segfault with HowToUseJIT (original) (raw)

Praveen Velliengiri via llvm-dev llvm-dev at lists.llvm.org
Mon Feb 24 21:30:33 PST 2020

Hi Frank, Actually, IR generated in the code is incomplete. IR module must contain two function definitions but when printing the IRModule you get only ;ModuleID = 'test' source_filename = "test"

On Tue, 25 Feb 2020 at 03:35, David Blaikie via llvm-dev < llvm-dev at lists.llvm.org> wrote:

+Lang, Veteran of the JIT Wars (/owner of LLVM JIT infrastructure) - might have some ideas here.

On Mon, Feb 24, 2020 at 1:34 PM Frank Winter via llvm-dev <_ _llvm-dev at lists.llvm.org> wrote:

Hi!

I've started looking porting our application which uses LLVM JIT to using LLVM 9 (9.0.1). To begin, I tried running the HowToUseJIT.cpp (example directory) program and it fails with a segfault:

./HowToUseJIT We just constructed this LLVM module: ; ModuleID = 'test' sourcefilename = "test" Running foo: Segmentation fault (core dumped)

Running it through GDB: Program received signal SIGSEGV, Segmentation fault. 0x0000000000404912 in main () at HowToUseJIT.cc:131 131 GenericValue gv = EE->runFunction(FooF, noargs); (gdb) bt #0 0x0000000000404912 in main () at HowToUseJIT.cc:131 It seems it fails when the JIT-compiled function gets called. I freshly downloaded LLVM 9.0.1 and build it with the backend "X86". The machine I am running this on is a 'Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz' Any ideas? Frank

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