#include "param.h"

#include "types.h"

#include "stat.h"

#include "user.h"

#include "syscall.h"

#include "traps.h"

#define TEST_NAME "crowd_maxspawnfork"

#include "318_test-tapish.h"

#define LOTS NTHR-4

#define STKSIZE 1024

#define BAILOUT (*(int *)0x1000000) = 3;

/*Authors: Jose and Emily*/

/*Check that fork fails if there are available process slots but no available

* thread slots.*/

static void

spawnee(void *a) {

while(1){yield((int) a);}

}

int main() {

int i, pid;

void *s;

int guard = 1;

TEST_STRT(1);

TEST_DIAG("WARNING: this test will fail if run with more than two existing processes");

int parent_pid = getpid();

pid = fork();

TEST_EXIT_IF(pid < 0, "Fork failed.\n");

if (pid == 0) {

for(i = 0; i < LOTS; i++) {

TEST_DIAG("spawned %d", i + 5);

TEST_EXIT_IF((s = malloc(STKSIZE)) == 0, "oom");

s += STKSIZE;

TEST_EXIT_IF(tspawn(s, spawnee, (void *) parent_pid) < 0,

"spawn fail before full at i=%d", i);

}

// inherently racy - if mkrun happens before desch, we'll never wake up

// not too likely, esp since every thread is yielding to the parent

mkrun(parent_pid);

while(1);

}

desch(&guard);

TEST_EXIT_IF(fork() > 0, "Fork succeeded even though there were no "

"more threads available.");

kill(pid);

wait();

TEST_FINI();

exit();

}