pintos-doxygen/html/mmap-read_8c_source.html

/** Uses a memory mapping to read a file. */


#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 = (char *) 0x10000000;

  int handle;

  mapid_t map;

  size_t i;


  CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\"");

  CHECK ((map = mmap (handle, actual)) != MAP_FAILED, "mmap \"sample.txt\"");


  /* Check that data is correct. */

  if (memcmp (actual, sample, strlen (sample)))

    fail ("read of mmap'd file reported bad data");


  /* Verify that data is followed by zeros. */

  for (i = strlen (sample); i < 4096; i++)

    if (actual[i] != 0)

      fail ("byte %zu of mmap'd region has value %02hhx (should be 0)",

            i, actual[i]);


  munmap (map);

  close (handle);

}

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

close
void close(int fd)
Definition: syscall.c:139

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

munmap
void munmap(mapid_t mapid)
Definition: syscall.c:151

MAP_FAILED
#define MAP_FAILED
Definition: syscall.h:13

mapid_t
int mapid_t
Map region identifier.
Definition: syscall.h:12

fail
void fail(const char *format,...)
Definition: lib.c:40

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)
Uses a memory mapping to read a file.
Definition: mmap-read.c:10

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