stack740, stack744, stack748, stack752, stack756, stack760,
	stack764, stack768, stack772, stack776, stack780, stack784,
	stack788, stack792, stack796, stack800, stack804, stack808,
	stack812, stack816, stack820, stack824, stack828, stack832,
	stack836, stack840, stack844, stack848, stack852, stack856,
	stack860, stack864, stack868, stack872, stack876, stack880,
	stack884, stack888, stack892, stack896, stack900, stack904,

	// Next, verify that switching stacks doesn't break callbacks.

	char *stack1 = malloc(STACK_SIZE);
	if (stack1 == NULL) {
		perror("malloc");
		exit(1);
	}

	// Allocate the second stack before freeing the first to ensure we don't get
	// the same address from malloc.
	//
	// Will be freed in stackSwitchThread2.
	stack2 = malloc(STACK_SIZE);
	if (stack1 == NULL) {
		perror("malloc");
		exit(1);
	}

}

func TestShrinkStackDuringBlockedSend(t *testing.T) {
	// make sure that channel operations still work when we are
	// blocked on a channel send and we shrink the stack.
	// NOTE: this test probably won't fail unless stack1.go:stackDebug
	// is set to >= 1.
	const n = 10
	c := make(chan int)
	done := make(chan struct{})

	go func() {
		for i := 0; i < n; i++ {
			c <- i
			// use lots of stack, briefly.