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Add code which creates a System V shared memory segment, attaches to it,

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makes it resident, MADV_FREE's it, and then checks to see that the pages
are indeed no longer resident.  This tests the uvm_aobj flush routine.
This commit is contained in:
thorpej 1999-07-17 06:01:52 +00:00
parent 976aedb7ac
commit b9aef1ceeb
1 changed files with 38 additions and 2 deletions
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40
regress/sys/uvm/mmap/mmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: mmap.c,v 1.3 1999/07/14 21:10:13 thorpej Exp $ */
/* $NetBSD: mmap.c,v 1.4 1999/07/17 06:01:52 thorpej Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
@ -44,6 +44,8 @@
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <err.h>
#include <errno.h>
@ -70,7 +72,7 @@ main(argc, argv)
{
struct stat st;
void *addr, *addr2;
int i, ch, ecode, fd, npgs;
int i, ch, ecode, fd, npgs, shmid;
const char *filename;
u_int8_t *cp;
@ -290,6 +292,40 @@ main(argc, argv)
}
}
printf(">>> CREATING SYSV SHM SEGMENT <<<\n");
if ((shmid = shmget(IPC_PRIVATE, npgs * pgsize, IPC_CREAT)) == -1)
err(1, "shmget");
if ((addr = shmat(shmid, NULL, 0)) == NULL)
err(1, "shmat");
printf(" ZEROING SEGMENT\n");
memset(addr, 0, npgs * pgsize);
printf(" CHECKING RESIDENCY\n");
if (check_residency(addr, npgs) != npgs) {
printf(" RESIDENCY CHECK FAILED!\n");
ecode = 1;
}
printf(" MADV_FREE'ING SEGMENT\n");
if (madvise(addr, npgs * pgsize, MADV_FREE) == -1)
err(1, "madvise");
printf(" CHECKING RESIDENCY\n");
if (check_residency(addr, npgs) != 0) {
printf(" RESIDENCY CHECK FAILED!\n");
ecode = 1;
}
if (shmdt(addr) == -1)
warn("shmdt");
if (shmctl(shmid, IPC_RMID, NULL) == -1)
err(1, "shmctl");
exit(ecode);
}