1  /* { dg-shouldfail "tsan" } */
       2  /* { dg-additional-options "-fno-ipa-modref" } */
       3  
       4  #include <stdlib.h>
       5  
       6  void __attribute__((noinline)) foo(int *mem) {
       7    free(mem);
       8  }
       9  
      10  void __attribute__((noinline)) bar(int *mem) {
      11    mem[0] = 42;
      12  }
      13  
      14  int main() {
      15    int *mem = (int*)malloc(100);
      16    foo(mem);
      17    bar(mem);
      18    return 0;
      19  }
      20  
      21  /* { dg-output "WARNING: ThreadSanitizer: heap-use-after-free.*(\n|\r\n|\r)" } */
      22  /* { dg-output "  Write of size 4.* by main thread:(\n|\r\n|\r)" } */
      23  /* { dg-output "    #0 bar.*" } */
      24  /* { dg-output "    #1 main .*" } */
      25  /* { dg-output "  Previous write of size 8 at .* by main thread:(\n|\r\n|\r)" } */
      26  /* { dg-output "    #0 free .*" } */
      27  /* { dg-output "    #\(1|2\) foo.*(\n|\r\n|\r)" } */
      28  /* { dg-output "    #\(2|3\) main .*" } */
      29