Pintos: pintos/src/tests/vm/mmap-over-data.c Source File

00001 /* Verifies that mapping over the data segment is disallowed. */
00002 
00003 #include <stdint.h>
00004 #include <round.h>
00005 #include <syscall.h>
00006 #include "tests/lib.h"
00007 #include "tests/main.h"
00008 
00009 static char x;
00010 
00011 void
00012 test_main (void) 
00013 {
00014   uintptr_t x_page = ROUND_DOWN ((uintptr_t) &x, 4096);
00015   int handle;
00016   
00017   CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\"");
00018   CHECK (mmap (handle, (void *) x_page) == MAP_FAILED,
00019          "try to mmap over data segment");
00020 }
00021