File: free_race3.c

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (29 lines) | stat: -rw-r--r-- 630 bytes parent folder | download | duplicates (29) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 
// RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s

#include "test.h"

int *mem;

void *Thread(void *x) {
  mem[0] = 42;
  barrier_wait(&barrier);
  return NULL;
}

int main() {
  barrier_init(&barrier, 2);
  mem = (int*)malloc(100);
  pthread_t t;
  pthread_create(&t, 0, Thread, 0);
  barrier_wait(&barrier);
  free(mem);
  pthread_join(t, NULL);
  return 0;
}

// CHECK: WARNING: ThreadSanitizer: data race
// CHECK:   Write of size 8 at {{.*}} by main thread{{.*}}:
// CHECK:     #0 free
// CHECK:     #{{(1|2)}} main
// CHECK:   Previous write of size 4 at {{.*}} by thread T1{{.*}}:
// CHECK:     #0 Thread