test/tsan/free_race2.c

   1 // RUN: %clang_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
   2 #include <stdlib.h>
   3
   4 void __attribute__((noinline)) foo(int *mem) {
   5   free(mem);
   6 }
   7
   8 void __attribute__((noinline)) bar(int *mem) {
   9   mem[0] = 42;
  10 }
  11
  12 int main() {
  13   int *mem = (int*)malloc(100);
  14   foo(mem);
  15   bar(mem);
  16   return 0;
  17 }
  18
  19 // CHECK: WARNING: ThreadSanitizer: heap-use-after-free
  20 // CHECK:   Write of size 4 at {{.*}} by main thread:
  21 // CHECK:     #0 bar
  22 // CHECK:     #1 main
  23 // CHECK:   Previous write of size 8 at {{.*}} by main thread:
  24 // CHECK:     #0 free
  25 // CHECK:     #{{1|2}} foo
  26 // CHECK:     #{{2|3}} main