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// https://bugs.kde.org/show_bug.cgi?id=228343
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <signal.h>
#include <libkern/OSAtomic.h>
#include <pthread.h>
OSSpinLock sl = OS_SPINLOCK_INIT;
typedef void *(*worker_t)(void*);
typedef void (*Sigaction)(int, siginfo_t *, void *);
int GLOB=0;
static void EnableSigprof(Sigaction SignalHandler) {
struct sigaction sa;
sa.sa_sigaction = SignalHandler;
sa.sa_flags = SA_RESTART | SA_SIGINFO;
sigemptyset(&sa.sa_mask);
if (sigaction(SIGPROF, &sa, NULL) != 0) {
perror("sigaction");
abort();
}
struct itimerval timer;
timer.it_interval.tv_sec = 0;
timer.it_interval.tv_usec = 1000000 / 10000;
timer.it_value = timer.it_interval;
if (setitimer(ITIMER_PROF, &timer, 0) != 0) {
perror("setitimer");
abort();
}
}
void *Worker() {
long int i;
for (i = 0; i < 100000000; i++) {
void *x = malloc((i % 64) + 1);
free (x);
}
return NULL;
}
void SignalHandlerWithSpinlock(int sig, siginfo_t *siginfo, void *context) {
OSSpinLockLock(&sl);
GLOB++;
OSSpinLockUnlock(&sl);
}
int main() {
EnableSigprof(SignalHandlerWithSpinlock);
pthread_t w_1;
pthread_t w_2;
pthread_create(&w_1, NULL, Worker, NULL);
pthread_create(&w_2, NULL, Worker, NULL);
pthread_join(w_1, NULL);
pthread_join(w_2, NULL);
printf("\tGLOB=%d\n", GLOB);
return 0;
}
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