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/* Stress test for the --free-is-write command-line option. */
#include <assert.h>
#include <limits.h>
#include <pthread.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define MALLOC_SIZE 22816
#define THREAD_COUNT 10
#define MALLOC_COUNT 1000
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
// 'mutex' protects 'count'.
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
static unsigned count;
void* thread_func(void* arg)
{
unsigned i;
for (i = 0; i < MALLOC_COUNT; ++i) {
void* ptr;
ptr = malloc(MALLOC_SIZE);
memset(ptr, 0, MALLOC_SIZE);
free(ptr);
}
pthread_mutex_lock(&mutex);
++count;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
return 0;
}
int main(int argc, char **argv)
{
pthread_t thread[THREAD_COUNT];
int result;
int i;
for (i = 0; i < THREAD_COUNT; i++) {
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN + 4096);
result = pthread_create(&thread[i], &attr, thread_func, 0);
pthread_attr_destroy(&attr);
assert(result == 0);
}
pthread_mutex_lock(&mutex);
while (count < THREAD_COUNT && pthread_cond_wait(&cond, &mutex) == 0)
;
pthread_mutex_unlock(&mutex);
for (i = 0; i < THREAD_COUNT; i++)
pthread_join(thread[i], 0);
fflush(stdout);
fprintf(stderr, "Done.\n");
return 0;
}
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