Test thread data races

test_min_value.sh

min=40000
for i in {1..10000}; do 
    a=$(./test)
    min=$((a<min?a:min)); 
done
echo $min

thread.c

#include <pthread.h>
#include <stdio.h>

int var = 0;

#define NTHREADS 2
#define MAXVAL 40000 / NTHREADS

void *other_thread() {
	for(int i=0; i<MAXVAL; i++) {
  		var++;
	}
}


int main() {
	pthread_t threads[NTHREADS];
	for (int i=0;i<NTHREADS;i++) {
		pthread_create(&threads[i], NULL, other_thread, NULL);
	}
	for (int i=0;i<NTHREADS;i++) {
		pthread_join(threads[i], NULL);
	}
	printf("%d\n", var);
	return 0;
}