File: sleep_sync.cpp

package info (click to toggle)
swiftlang 6.1.3-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,532 kB
  • sloc: cpp: 9,901,743; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (32 lines) | stat: -rw-r--r-- 687 bytes parent folder | download | duplicates (28) 
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
30
31
32
 
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
#include "test.h"

int X = 0;

__attribute__((noinline)) void MySleep() {
  sleep(1);  // the sleep that must appear in the report
}

void *Thread(void *p) {
  barrier_wait(&barrier);
  MySleep();  // Assume the main thread has done the write.
  X = 42;
  return 0;
}

int main() {
  barrier_init(&barrier, 2);
  pthread_t t;
  pthread_create(&t, 0, Thread, 0);
  X = 43;
  barrier_wait(&barrier);
  pthread_join(t, 0);
  return 0;
}

// CHECK: WARNING: ThreadSanitizer: data race
// ...
// CHECK:   As if synchronized via sleep:
// CHECK-NEXT:     #0 sleep
// CHECK-NEXT:     #1 MySleep
// CHECK-NEXT:     #2 Thread