[LLVMdev] Forcing the Interpreter segfaults

[Salomon Brys]

Hi everyone !
I am very new to LLVM and intent to use it in a research project.
I have a problem with the interpreter: I have a simple compiler that
generates LLVM bitcode, JIT it and execute it, and it works very well.
Now I would like to execute it using the interpreter. And I get a segfault.

Here is the code :

// This code JIT the function and executes it
 llvm::InitializeNativeTarget();
llvm::ExecutionEngine * EJ  = llvm::ExecutionEngine::create(&nM);
 typedef int (*REFunc)(const char *);
union { void * obj; REFunc func; } u;
 u.obj = EJ->getPointerToFunction(func);
REFunc jit = u.func;
int ret = jit("aaa");
 std::cout << std::endl << ret << std::endl;

// This code interprets the function
 llvm::initializeCore();
llvm::ExecutionEngine * EI  =
llvm::EngineBuilder(&M).setEngineKind(llvm::EngineKind::Interpreter).create();
 EI->runStaticConstructorsDestructors(false);
std::vector<llvm::GenericValue> args;
 llvm::GenericValue arg1((void*)"aaabc");
args.push_back(arg1);
llvm::APInt res = EI->runFunction(func, args).IntVal;
 llvm::outs() << res << "\n";

The first block of code works very well and write the expected result.
The second block segfaults on the EI->runFunction(func, args) call.
I can't find my mistake. Would somebody help me on this ???

Thank you very much !

Salomon BRYS.

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