File: signal_sync.cpp

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (56 lines) | stat: -rw-r--r-- 1,079 bytes parent folder | download | duplicates (40) 
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
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
// UNSUPPORTED: darwin
#include "test.h"
#include <signal.h>
#include <sys/types.h>
#include <sys/time.h>
#include <errno.h>

volatile int X;

static void handler(int sig) {
  (void)sig;
  if (X != 42)
    printf("bad");
}

static void* thr(void *p) {
  for (int i = 0; i != 1000; i++)
    usleep(1000);  // process signals
  return 0;
}

int main() {
  const int kThreads = 10;
  pthread_t th[kThreads];
  for (int i = 0; i < kThreads; i++)
    pthread_create(&th[i], 0, thr, 0);

  X = 42;

  struct sigaction act = {};
  act.sa_handler = &handler;
  if (sigaction(SIGPROF, &act, 0)) {
    perror("sigaction");
    exit(1);
  }

  itimerval t;
  t.it_value.tv_sec = 0;
  t.it_value.tv_usec = 10;
  t.it_interval = t.it_value;
  if (setitimer(ITIMER_PROF, &t, 0)) {
    perror("setitimer");
    exit(1);
  }

  for (int i = 0; i < kThreads; i++)
    pthread_join(th[i], 0);

  fprintf(stderr, "DONE\n");
  return 0;
}

// CHECK-NOT: WARNING: ThreadSanitizer:
// CHECK: DONE
// CHECK-NOT: WARNING: ThreadSanitizer: