如何从LLVM中的CallInst获取间接调用的函数名称 [英] How can I get Function Name of indirect call from CallInst in LLVM

问题描述

Function *fun = call->getCalledFunction();

如果

getCalledFunction();是间接调用，则返回null.如何获得函数名称或指针名称?

getCalledFunction(); returns null if it's indirect call. How can I get the name of the function or the name of the pointer?

我发现Stack Overflow中与此问题有关的所有问题都涉及直接调用的函数名或指针类型.

I found all questions in Stack Overflow related to this issue talked about function name of direct call, or type of pointer.

我只想跟踪这种情况:

void foo(){}
void goo(){}
void main(){
  int x = 1;
  void (*p)();
  if(x)
    p = &foo;
  else
    p = &goo;
  p(); // print the called function name
}

推荐答案

我遇到了同样的问题.阅读llvm源代码后，这是我的解决方案:

I get the same problem. Here is my solution after reading the llvm source code:

Function* fp = CI->getCalledFunction();
if (fp==NULL) {
    Value* v=CI->getCalledValue();
    Value* sv = v->stripPointerCasts();
    StringRef fname = sv->getName();
    errs()<<fname<<"\n";
 }

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