compiler-rt/test/asan/TestCases/Linux/interception_test.cpp

   1 // ASan interceptor can be accessed with __interceptor_ prefix.
   2
   3 // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
   4 // RUN: %clangxx_asan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
   5 // RUN: %clangxx_asan -O2 %s -o %t && not %run %t 2>&1 | FileCheck %s
   6 // RUN: %clangxx_asan -O3 %s -o %t && not %run %t 2>&1 | FileCheck %s
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9
  10 extern "C" long __interceptor_strtol(const char *nptr, char **endptr, int base);
  11 extern "C" long strtol(const char *nptr, char **endptr, int base) {
  12   fprintf(stderr, "my_strtol_interceptor\n");
  13   return __interceptor_strtol(nptr, endptr, base);
  14 }
  15
  16 int main() {
  17   char *x = (char*)malloc(10 * sizeof(char));
  18   free(x);
  19   return (int)strtol(x, 0, 10);
  20   // CHECK: my_strtol_interceptor
  21   // CHECK: heap-use-after-free
  22 }