Add some pretty simple tests for various memory mapping facilities.
There's lots more work to do here, but this simple program found a couple of problems which I've fixed recently.
This commit is contained in:
thorpej
parent
49aa92dfc0
commit
03826522e4
@ -1,6 +1,6 @@
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# $NetBSD: Makefile,v 1.8 1999/03/10 18:57:06 bouyer Exp $
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# $NetBSD: Makefile,v 1.9 1999/06/19 00:53:31 thorpej Exp $
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SUBDIR= kern fs
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SUBDIR= kern fs uvm
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.if exists(arch/${MACHINE})
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SUBDIR+= arch/${MACHINE}
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.endif
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5
regress/sys/uvm/Makefile
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5
regress/sys/uvm/Makefile
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# $NetBSD: Makefile,v 1.1 1999/06/19 00:53:32 thorpej Exp $
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SUBDIR+= mmap
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.include <bsd.subdir.mk>
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16
regress/sys/uvm/mmap/Makefile
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16
regress/sys/uvm/mmap/Makefile
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# $NetBSD: Makefile,v 1.1 1999/06/19 00:53:32 thorpej Exp $
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PROG= mmap
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MKMAN= no
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# This is hopefully just some file not mmap'd very often.
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SOME_FILE=/usr/share/misc/zipcodes
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regress:
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@if ./mmap ${SOME_FILE}; then \
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echo "PASSED"; \
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else \
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echo "FAILED"; \
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fi
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.include <bsd.prog.mk>
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224
regress/sys/uvm/mmap/mmap.c
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224
regress/sys/uvm/mmap/mmap.c
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/* $NetBSD: mmap.c,v 1.1 1999/06/19 00:53:32 thorpej Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Test various memory mapping facilities.
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*/
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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int main __P((int, char *[]));
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void usage __P((void));
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int check_residency __P((void *, int));
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int pgsize;
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int verbose;
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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struct stat st;
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void *addr, *addr2;
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int ch, ecode, fd, npgs;
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const char *filename;
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while ((ch = getopt(argc, argv, "v")) != -1) {
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switch (ch) {
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case 'v':
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verbose = 1;
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break;
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default:
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usage();
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}
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}
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argv += optind;
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argc -= optind;
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if (argc != 1)
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usage();
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filename = argv[0];
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ecode = 0;
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pgsize = sysconf(_SC_PAGESIZE);
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/*
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* TEST MLOCKING A FILE.
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*/
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printf(">>> MAPPING FILE <<<\n");
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fd = open(filename, O_RDONLY, 0666);
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if (fd == -1)
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err(1, "open %s", filename);
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if (fstat(fd, &st) == -1)
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err(1, "fstat %s", filename);
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addr = mmap(NULL, (size_t) st.st_size, PROT_READ, MAP_FILE|MAP_SHARED,
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fd, (off_t) 0);
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if (addr == MAP_FAILED)
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err(1, "mmap %s", filename);
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(void) close(fd);
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npgs = (st.st_size / pgsize) + 1;
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printf(" CHECKING RESIDENCY\n");
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(void) check_residency(addr, npgs);
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printf(" LOCKING RANGE\n");
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if (mlock(addr, npgs * pgsize) == -1)
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err(1, "mlock %s", filename);
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printf(" CHECKING RESIDENCY\n");
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if (check_residency(addr, npgs) != npgs) {
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printf(" RESIDENCY CHECK FAILED!\n");
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ecode = 1;
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}
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printf(" UNLOCKING RANGE\n");
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if (munlock(addr, pgsize) == -1)
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err(1, "munlock %s", filename);
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(void) munmap(addr, st.st_size);
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/*
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* TEST MLOCKALL'ING AN ANONYMOUS MEMORY RANGE.
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*/
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npgs = 8;
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printf(">>> MAPPING %d PAGE ANONYMOUS REGION <<<\n", npgs);
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addr = mmap(NULL, npgs * pgsize, PROT_READ|PROT_WRITE,
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MAP_ANON|MAP_PRIVATE, -1, (off_t) 0);
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if (addr == MAP_FAILED)
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err(1, "mmap anon #1");
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printf(" CHECKING RESIDENCY\n");
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(void) check_residency(addr, npgs);
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printf(" LOCKING ALL - CURRENT and FUTURE\n");
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if (mlockall(MCL_CURRENT|MCL_FUTURE) == -1)
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err(1, "mlockall current/future");
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printf(" CHECKING RESIDENCY\n");
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if (check_residency(addr, npgs) != npgs) {
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printf(" RESIDENCY CHECK FAILED!\n");
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ecode = 1;
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}
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printf(">>> MAPPING ANOTHER %d PAGE ANONYMOUS REGION <<<\n", npgs);
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addr2 = mmap(NULL, npgs * pgsize, PROT_READ, MAP_ANON, -1, (off_t) 0);
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if (addr == MAP_FAILED)
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err(1, "mmap anon #2");
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printf(" CHECKING RESIDENCY\n");
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if (check_residency(addr2, npgs) != npgs) {
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printf(" RESIDENCY CHECK FAILED!\n");
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ecode = 1;
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}
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printf(" UNLOCKING ALL\n");
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(void) munlockall();
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exit(ecode);
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}
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int
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check_residency(addr, npgs)
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void *addr;
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int npgs;
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{
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char *vec;
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int i, resident;
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vec = malloc(npgs);
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if (vec == NULL)
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err(1, "malloc mincore vec");
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if (mincore(addr, npgs * pgsize, vec) == -1)
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err(1, "mincore");
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for (i = 0, resident = 0; i < npgs; i++) {
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if (vec[i] != 0)
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resident++;
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if (verbose)
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printf("page 0x%lx is %sresident\n",
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addr + (i * pgsize), vec[i] ? "" : "not ");
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}
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free(vec);
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return (resident);
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}
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void
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usage()
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{
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extern const char *__progname;
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fprintf(stderr, "usage: %s [-v] filename\n", __progname);
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exit(1);
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}
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