c++ - Determining Variable Accesses Using Clang -


i'm building clang tool goes through c/c++ program , records variable references along whether read or modified. i'm using astmatchers match expressions match variable declarations.

my code follows.

for astmatcher:

finder->addmatcher(declrefexpr(hasdeclaration(vardecl(isexpansioninmainfile()).bind(types[var_call])),hasancestor(functiondecl().bind(types[caller_var]))).bind(types[var_expr]), this);

for run(...) portion of matcher: 

if (const vardecl *dec = result.nodes.getnodeas<clang::vardecl>(types[var_call])){         //if variable reference has been found.         auto *caller = result.nodes.getnodeas<clang::declaratordecl>(types[caller_var]);         auto *expr = result.nodes.getnodeas<clang::declrefexpr>(types[var_expr]);          //todo: detect simple variable read/writes. }

ignoring aliasing (since want simple, direct accesses), there way this?

i did see this previous stackoverflow question answers focused on aliasing.

example:

#include <iostream>  using namespace std;  int main() {     int test = 0;     int test2 = 1;      //variable modification.     test = test2;      return 0; }

analyzing sample c++ program detect test being modified , test2 being read from.


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