#include <stdio.h>      /* for printf, etc. */
#include <stdlib.h>     /* for sleep, etc. */
#include <sys/types.h>  /* for getpid(), see "man getpid" */
#include <unistd.h>  /* for getpid(), see "man getpid" */
/* blowup.c D. Parson for CSC343 to show a segmentation fault when a
 * process tries to use memory outside of its range. April 2020.
 * blowstack.c blows out the heap with recursive pmapCommandBuffer [ 84000 ] ;
*/
void recursion() ;
int main() {
    int i = 4 ;
    int *ip = &i ;
    printf("at ip address %lx is value %d\n",
        ip, *ip);

    system("ps -fu parson");
    /* sleep(10); */
    recursion();
    return 0 ;
}

void recursion() {
    char pmapCommandBuffer [ 84000 ] ; /* just make it big */
    sprintf(pmapCommandBuffer, "pmap %ld", (int)getpid()); /* get's process ID */
    printf("\nCMD %s\n", pmapCommandBuffer);
    system(pmapCommandBuffer);

    sprintf(pmapCommandBuffer, "pstack %ld", (int)getpid()); /* get's process ID */
    printf("\nCMD %s\n", pmapCommandBuffer);
    system(pmapCommandBuffer);

    // sleep(4);

    recursion() ;
}