如何在运行时使用llvm pass工具获得动态分配的堆地址和malloc大小？

#include "llvm/Pass.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Instructions.h"
#include "llvm/Support/raw_ostream.h"

using namespace llvm;

namespace {
  struct HeapAllocationPass : public FunctionPass {
    static char ID;
    HeapAllocationPass() : FunctionPass(ID) {}

    bool runOnFunction(Function &F) override {
      for (auto &BB : F) {
        for (auto &I : BB) {
          if (auto *CI = dyn_cast<CallInst>(&I)) {
            Function *calledFunc = CI->getCalledFunction();
            if (calledFunc && calledFunc->getName() == "malloc") {
              Value *sizeArg = CI->getArgOperand(0);
              errs() << "Dynamic allocation: size = " << *sizeArg << "\n";
              errs() << "Heap address: " << CI << "\n";
            }
          }
        }
      }
      return false;
    }
  };
}

char HeapAllocationPass::ID = 0;

static RegisterPass<HeapAllocationPass> X("heap-allocation", "Heap Allocation Pass");