pintos-doxygen/html/mmap-write_8c_source.html

/** Writes to a file through a mapping, and unmaps the file,

   then reads the data in the file back using the read system

   call to verify. */


#include <string.h>

#include <syscall.h>

#include "tests/vm/sample.inc"

#include "tests/lib.h"

#include "tests/main.h"


#define ACTUAL ((void *) 0x10000000)


void

test_main (void)

{

  int handle;

  mapid_t map;

  char buf[1024];


  /* Write file via mmap. */

  CHECK (create ("sample.txt", strlen (sample)), "create \"sample.txt\"");

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

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

  memcpy (ACTUAL, sample, strlen (sample));

  munmap (map);


  /* Read back via read(). */

  read (handle, buf, strlen (sample));

  CHECK (!memcmp (buf, sample, strlen (sample)),

         "compare read data against written data");

  close (handle);

}

buf
static char buf[BUF_SIZE]
Definition: child-syn-read.c:16

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

create
bool create(const char *file, unsigned initial_size)
Definition: syscall.c:91

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

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

read
int read(int fd, void *buffer, unsigned size)
Definition: syscall.c:115

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

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

ACTUAL
#define ACTUAL
Writes to a file through a mapping, and unmaps the file, then reads the data in the file back using t...
Definition: mmap-write.c:11

test_main
void test_main(void)
tests/main.h
Definition: mmap-write.c:14

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

memcpy
void * memcpy(void *dst_, const void *src_, size_t size)
Copies SIZE bytes from SRC to DST, which must not overlap.
Definition: string.c:7

string.h