none/tests/darwin/bug228343.c

   1 // https://bugs.kde.org/show_bug.cgi?id=228343
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <sys/time.h>
   6 #include <signal.h>
   7 #include <libkern/OSAtomic.h>
   8 #include <pthread.h>
   9
  10 OSSpinLock sl = OS_SPINLOCK_INIT;
  11 typedef void *(*worker_t)(void*);
  12 typedef void (*Sigaction)(int, siginfo_t *, void *);
  13
  14 int GLOB=0;
  15
  16 static void EnableSigprof(Sigaction SignalHandler) {
  17  struct sigaction sa;
  18  sa.sa_sigaction = SignalHandler;
  19  sa.sa_flags = SA_RESTART | SA_SIGINFO;
  20  sigemptyset(&sa.sa_mask);
  21  if (sigaction(SIGPROF, &sa, NULL) != 0) {
  22    perror("sigaction");
  23    abort();
  24  }
  25  struct itimerval timer;
  26  timer.it_interval.tv_sec = 0;
  27  timer.it_interval.tv_usec = 1000000 / 10000;
  28  timer.it_value = timer.it_interval;
  29  if (setitimer(ITIMER_PROF, &timer, 0) != 0) {
  30    perror("setitimer");
  31    abort();
  32  }
  33 }
  34
  35 void *Worker() {
  36  long int i;
  37  for (i = 0; i < 100000000; i++) {
  38    void *x = malloc((i % 64) + 1);
  39    free (x);
  40  }
  41  return NULL;
  42 }
  43
  44 void SignalHandlerWithSpinlock(int sig, siginfo_t *siginfo, void *context) {
  45  OSSpinLockLock(&sl);
  46  GLOB++;
  47  OSSpinLockUnlock(&sl);
  48 }
  49
  50 int main() {
  51  EnableSigprof(SignalHandlerWithSpinlock);
  52  pthread_t w_1;
  53  pthread_t w_2;
  54  pthread_create(&w_1, NULL, Worker, NULL);
  55  pthread_create(&w_2, NULL, Worker, NULL);
  56  pthread_join(w_1, NULL);
  57  pthread_join(w_2, NULL);
  58  printf("\tGLOB=%d\n", GLOB);
  59  return 0;
  60 }