#include <stdio.h>
#include <string.h>
#include <syscall.h>
#include "tests/arc4.h"
#include "tests/cksum.h"
#include "tests/lib.h"
#include "tests/main.h"

Include dependency graph for mmap-shuffle.c:

Macros
#define	SIZE (128 * 1024)
	Creates a 128 kB file and repeatedly shuffles data in it through a memory mapping. More...

Functions
void	test_main (void)
	tests/main.h More...

Variables
static char *	buf = (char *) 0x10000000

Macro Definition Documentation

◆ SIZE

#define SIZE (128 * 1024)

Creates a 128 kB file and repeatedly shuffles data in it through a memory mapping.

Definition at line 12 of file mmap-shuffle.c.

Function Documentation

◆ test_main()

void test_main ( void )

tests/main.h

This must fail, because that directory is non-empty.

tests/main.h

This must fail.

tests/main.h

and an ordinary file in each of them, until we fill up the disk.

Then delete most of them, for two reasons. First, "tar" limits file names to 100 characters (which could be extended to 256 without much trouble). Second, a full disk has no room for the tar archive.

tests/main.h

This should terminate the process with a -1 exit code.

tests/main.h

Sets the stack pointer (esp) to an invalid value and invokes a system call, which should then terminate the process with a -1 exit code.

tests/main.h

The second close must either fail silently or terminate with exit code -1.

tests/main.h

This is valid, so it must succeed.

tests/main.h

The process must be terminated with exit code -1.

tests/main.h

The process must be terminated with -1 exit code.

tests/main.h

Must kill process.

tests/main.h

The exec system call must return -1.

tests/main.h

(Pintos does not have inheritance of file handles, so this must fail.) The parent process then attempts to use the file handle, which must succeed.

tests/main.h

The process must be terminated with -1 exit code because the argument to the system call would be above the top of the user address space.

tests/main.h

The process must be terminated with -1 exit code.

For Project 3: The bad address lies approximately 64MB below the code segment, so there is no ambiguity that this attempt must be rejected even after stack growth is implemented. Moreover, a good stack growth heuristics should probably not grow the stack for the purpose of reading the system call number and arguments.

tests/main.h

This must work.

tests/main.h

This may fail or terminate the process with -1 exit code.

tests/main.h

The first call must wait in the usual way and return the exit code. The second wait call must return -1 immediately.

tests/main.h

Tries to write to a mapping present in the parent. The process must be terminated with -1 exit code.

Definition at line 17 of file mmap-shuffle.c.

References buf, CHECK, cksum(), create(), arc4::i, MAP_FAILED, mmap(), msg(), open(), shuffle(), and SIZE.