How to use llvm.addressofreturnaddress() function?

Hi, I want to check the return address of function.

I use the following code to build pass.

"
FunctionType *func_type = FunctionType::get(ty_ptr, false);
Function *func = Function::Create(func_type, GlobalValue::ExternalLinkage, “llvm.addressofreturnaddress”, F->getParent());
IRBuilder<> Builder(inst);
Builder.CreateCall(func);

"
When I compiled it, the following error message appeared:

"
Intrinsic name not mangled correctly for type arguments! Should be: llvm.addressofreturnaddress.p0i8

i8* ()* @llvm.addressofreturnaddress"
So I made the following modification:

"
FunctionType *func_type = FunctionType::get(ty_ptr, false);
Function *func = Function::Create(func_type, GlobalValue::ExternalLinkage, “llvm.addressofreturnaddress.p0i8”, F->getParent());
IRBuilder<> Builder(inst);
Builder.CreateCall(func);
"
Compile through, I get the compiled so file.

However, the following error occurred when I used it to optimize my code:

"
Intrinsic name not mangled correctly for type arguments! Should be: llvm.addressofreturnaddress.p0i8
i8* ()* @llvm.addressofreturnaddress.p0i8.1 in function main

"

I can’t fix it. What should I do?

Then, I tried another way.

"
CallInst *IRBuilderBase::CreateIntrinsic(Intrinsic::ID ID,
751 ArrayRef<Type *> Types,
752 ArrayRef<Value *> Args,
753 Instruction *FMFSource,
754 const Twine &Name) {
755 Module *M = BB->getModule();
756 Function *Fn = Intrinsic::getDeclaration(M, ID, Types);
757 return createCallHelper(Fn, Args, this, Name, FMFSource);
758 }

"I use the following code.
"
Function *Fn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::addressofreturnaddress);

"
But,
"
Stack dump:
0. Program arguments: opt -load …/build/lib/LLVMMyPass.so -hello

  1. Running pass ‘Function Pass Manager’ on module ‘’.
  2. Running pass ‘Hello World Pass’ on function ‘@_Z4vulnv
    #0 0x0000563d2d976bba llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/opt/llvm/bin/opt+0x2458bba)
    #1 0x0000563d2d974954 llvm::sys::RunSignalHandlers() (/opt/llvm/bin/opt+0x2456954)
    #2 0x0000563d2d974a92 SignalHandler(int) (/opt/llvm/bin/opt+0x2456a92)
    #3 0x00007fce4a662890 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
    #4 0x0000563d2d238bd4 DecodeFixedType(llvm::ArrayRefllvm::Intrinsic::IITDescriptor&, llvm::ArrayRefllvm::Type*, llvm::LLVMContext&) (/opt/llvm/bin/opt+0x1d1abd4)
    #5 0x0000563d2d23b576 llvm::Intrinsic::getType(llvm::LLVMContext&, llvm::Intrinsic::ID, llvm::ArrayRefllvm::Type*) (/opt/llvm/bin/opt+0x1d1d576)
    #6 0x0000563d2d240ab5 llvm::Intrinsic::getDeclaration(llvm::Module*, llvm::Intrinsic::ID, llvm::ArrayRefllvm::Type*) (/opt/llvm/bin/opt+0x1d22ab5)
    #7 0x00007fce492f095a (anonymous namespace)::Hello::runOnFunction(llvm::Function&) (…/build/lib/LLVMMyPass.so+0x195a)
    #8 0x0000563d2d27db08 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/llvm/bin/opt+0x1d5fb08)
    #9 0x0000563d2d27e1f1 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/llvm/bin/opt+0x1d601f1)
    #10 0x0000563d2d27ce61 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/llvm/bin/opt+0x1d5ee61)
    #11 0x0000563d2bc5c193 main (/opt/llvm/bin/opt+0x73e193)
    #12 0x00007fce49513b97 __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/…/csu/libc-start.c:344:0
    #13 0x0000563d2bce06ba _start (/opt/llvm/bin/opt+0x7c26ba)
    Segmentation fault (core dumped)

"
I can’t understand it.
I tried to use “returnaddress” to replace “addressofreturnaddress”. It’s OK!
They are all Intrinsic function. Why?

Plese help me out.
Thanks.

Two issues: