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