compiler-rt/test/msan/poison_in_free.cpp

   1 // RUN: %clangxx_msan -O0 %s -o %t && not %run %t >%t.out 2>&1
   2 // FileCheck %s <%t.out
   3 // RUN: %clangxx_msan -O0 %s -o %t && env MSAN_OPTIONS=poison_in_free=0 %run %t >%t.out 2>&1
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8
   9 int main(int argc, char **argv) {
  10   char *volatile x = (char*)malloc(50 * sizeof(char));
  11   memset(x, 0, 50);
  12   free(x);
  13   return x[25];
  14   // CHECK: MemorySanitizer: use-of-uninitialized-value
  15   // CHECK: #0 {{.*}} in main{{.*}}poison_in_free.cpp:[[@LINE-2]]
  16 }