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

00001 /* Verifies that overlapping memory mappings are disallowed. */
00002 
00003 #include <syscall.h>
00004 #include "tests/vm/sample.inc"
00005 #include "tests/lib.h"
00006 #include "tests/main.h"
00007 
00008 void
00009 test_main (void)
00010 {
00011   char *start = (char *) 0x10000000;
00012   int fd[2];
00013 
00014   CHECK ((fd[0] = open ("zeros")) > 1, "open \"zeros\" once");
00015   CHECK (mmap (fd[0], start) != MAP_FAILED, "mmap \"zeros\"");
00016   CHECK ((fd[1] = open ("zeros")) > 1 && fd[0] != fd[1],
00017          "open \"zeros\" again");
00018   CHECK (mmap (fd[1], start + 4096) == MAP_FAILED,
00019          "try to mmap \"zeros\" again");
00020 }