Stevens Institute of Technology - Department of Computer Science

CS631 Week 06 Checkpoint

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Consider the following program:
int a;
char *s;
char buf[1024];

main(int argc, char **argv) {
	int b;
	char *string = "abcd";
For each variable, identify which memory segment (text, initialized data, bss, heap, stack, high address) it is allocated in.

What is the difference between a buffer overflow and a stack overflow?

Go through the Program Startup Exercise.
How similar / different is the Linux startup compared to the one you've seen on NetBSD?

What is the return value of the following program:
int func2() { _exit(0xcafe); }
int func() { exit(func2()); }
int main(int argc, char **argv) { printf("%d\n", func()); }

Under what circumstances might malloc return NULL?

What system call does a parent process use to determine a child process's PID?

What's your favorite zombie movie?