pintos-doxygen/html/mmap-inherit_8c_source.html

/** Maps a file into memory and runs child-inherit to verify that

   mappings are not inherited. */


#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 *) 0x54321000;

  int handle;

  pid_t child;


  /* Open file, map, verify data. */

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

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

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

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


  /* Spawn child and wait. */

  CHECK ((child = exec ("child-inherit")) != -1, "exec \"child-inherit\"");

  quiet = true;

  CHECK (wait (child) == -1, "wait for child (should return -1)");

  quiet = false;


  /* Verify data again. */

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

         "checking that mmap'd file still has same data");

}

wait
static void wait(struct intq *q, struct thread **waiter)

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

exec
pid_t exec(const char *file)
Definition: syscall.c:79

pid_t
int pid_t
Process identifier.
Definition: syscall.h:8

MAP_FAILED
#define MAP_FAILED
Definition: syscall.h:13

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

quiet
bool quiet
Definition: lib.c:9

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 a file into memory and runs child-inherit to verify that mappings are not inherited.
Definition: mmap-inherit.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