pintos-doxygen/html/mmap-twice_8c_source.html

/** Maps the same file into memory twice and verifies that the

   same data is readable in both. */


#include <string.h>

#include <syscall.h>

#include "tests/vm/sample.inc"

#include "tests/lib.h"

#include "tests/main.h"


void

test_main (void)

{

  char *actual[2] = {(char *) 0x10000000, (char *) 0x20000000};

  size_t i;

  int handle[2];


  for (i = 0; i < 2; i++)

    {

      CHECK ((handle[i] = open ("sample.txt")) > 1,

             "open \"sample.txt\" #%zu", i);

      CHECK (mmap (handle[i], actual[i]) != MAP_FAILED,

             "mmap \"sample.txt\" #%zu at %p", i, (void *) actual[i]);

    }


  for (i = 0; i < 2; i++)

    CHECK (!memcmp (actual[i], sample, strlen (sample)),

           "compare mmap'd file %zu against data", i);

}

mmap
mapid_t mmap(int fd, void *addr)
Project 3 and optionally project 4.
Definition: syscall.c:145

open
int open(const char *file)
Definition: syscall.c:103

MAP_FAILED
#define MAP_FAILED
Definition: syscall.h:13

lib.h

CHECK
#define CHECK(SUCCESS,...)
Takes an expression to test for SUCCESS and a message, which may include printf-style arguments.
Definition: lib.h:29

main.h

test_main
void test_main(void)
Maps the same file into memory twice and verifies that the same data is readable in both.
Definition: mmap-twice.c:11

memcmp
int memcmp(const void *a_, const void *b_, size_t size)
Find the first differing byte in the two blocks of SIZE bytes at A and B.
Definition: string.c:53

strlen
size_t strlen(const char *string)
Returns the length of STRING.
Definition: string.c:293

string.h