soya-onishi/libtoolingsegmentationfault

Problem Reproduction of libTooling

This is problem reproduction repository for a question posted stackoverflow.

The problem is segmentation fault is occured inside of libTooling binary, clang::dif::SyntaxTree::Impl::getDeclValue, and it may be from object calling virtual method has NULL vtable pointer.

Problem program is src/DiffBinOpsExtractor/main.cpp and libraries main.cpp depend on

How to build and run

Prerequisite

build LLVM and Clang from source tagged llvmorg-16.0.6 and install it. Please follow this instruction.

Build and Run this repo

First, run cmake. <cmake dir path> is /usr/local/lib/cmake, for example. its directory has clang/ClangConfig.cmake and llvm/LLVMConfig.cmake.

CXX=<installed clang path> cmake -B build -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH=<cmake dir path>

And, build by make in build dir.

cd build
make

run gdb.

cd <repository root>
gdb build/src/DiffBinOpsExtractor/diff-binops

(gdb) run ./example/a.c ./example/b.c

This will make same segmentation fault I said above.