File: mremap4.c

package info (click to toggle)
valgrind 1%3A3.24.0-3
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 176,332 kB
  • sloc: ansic: 795,029; exp: 26,134; xml: 23,472; asm: 14,393; cpp: 9,397; makefile: 7,464; sh: 6,122; perl: 5,446; python: 1,498; javascript: 981; awk: 166; csh: 1
file content (23 lines) | stat: -rw-r--r-- 477 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <sys/mman.h>

int main()
{
  int shmid = shmget(IPC_PRIVATE, 100 * 4096, 
                     IPC_CREAT | IPC_EXCL | S_IRUSR | S_IWUSR);
  assert(shmid != -1);

  void *addr = shmat(shmid, NULL, 0);
  assert(addr != (void *)-1);

  addr = mremap(addr, 100 * 4096, 40 * 4096, 0);
  assert(addr != (void *)-1);

  return 0;
}