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Bug #2320 » forklock.c

c.turner1, 02/29/2012 03:33 AM

 
#include <stdio.h>
#include <stdlib.h>

#include <sys/types.h>
#include <sys/mman.h>

int
main(int argc, char *argv[])
{
void *ptr;
pid_t pid;
size_t amt;
int wstat;

amt=(size_t) (1 * sizeof(char));
ptr = malloc(amt);

printf("pre-lock: %p\n", ptr);
mlock(ptr,amt);

if((pid = fork()) == 0) {
sleep(1);
printf("child: %p\n", ptr);
return 0;
}
else {
printf("parent: %p\n", ptr);
waitpid(pid, &wstat);
}

return 0;

}

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