Misc tests for mmap, mincore, mlock and mlockall.

From NetBSD.
XXX - chatty and should be really split up into smaller tests.

2 files changed, 438 insertions, 0 deletions

diff --git a/regress/sys/uvm/misc/Makefile b/regress/sys/uvm/misc/Makefile
new file mode 100644
index 00000000000..e3204313a67
--- /dev/null
+++ b/regress/sys/uvm/misc/Makefile
@@ -0,0 +1,5 @@
+#	$OpenBSD: Makefile,v 1.1 2002/02/16 17:31:10 art Exp $
+
+PROG=misc
+
+.include <bsd.regress.mk>
diff --git a/regress/sys/uvm/misc/misc.c b/regress/sys/uvm/misc/misc.c
new file mode 100644
index 00000000000..16d9b469c16
--- /dev/null
+++ b/regress/sys/uvm/misc/misc.c
@@ -0,0 +1,433 @@
+/*	$NetBSD: mmap.c,v 1.12 2001/02/19 22:44:41 cgd Exp $	*/
+
+/*-
+ * Copyright (c) 1999 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
+ * NASA Ames Research Center.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the NetBSD
+ *	Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Test various memory mapping facilities.
+ */
+
+#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>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>	/* for memset declaration (?) */
+
+int	main __P((int, char *[]));
+void	usage __P((void));
+
+int	check_residency __P((void *, int));
+
+int	pgsize;
+int	verbose;
+
+#define	MAPPED_FILE	"mapped_file"
+#define	TEST_PATTERN	0xa5
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	struct stat st;
+	void *addr, *addr2, *addr3;
+	int i, ch, ecode, fd, npgs, shmid;
+	const char *filename;
+	u_int8_t *cp;
+
+	while ((ch = getopt(argc, argv, "v")) != -1) {
+		switch (ch) {
+		case 'v':
+			verbose = 1;
+			break;
+
+		default:
+			usage();
+		}
+	}
+	argv += optind;
+	argc -= optind;
+
+	if (argc > 0)
+		filename = argv[0];
+	else
+		filename = "/usr/share/dict/words";
+
+	ecode = 0;
+
+	pgsize = sysconf(_SC_PAGESIZE);
+
+	/*
+	 * TEST MLOCKING A FILE.
+	 */
+
+	printf(">>> MAPPING FILE <<<\n");
+
+	fd = open(filename, O_RDONLY, 0666);
+	if (fd == -1)
+		err(1, "open %s", filename);
+
+	if (fstat(fd, &st) == -1)
+		err(1, "fstat %s", filename);
+
+	addr = mmap(NULL, (size_t) st.st_size, PROT_READ, MAP_FILE|MAP_SHARED,
+	    fd, (off_t) 0);
+	if (addr == MAP_FAILED)
+		err(1, "mmap %s", filename);
+
+	(void) close(fd);
+
+	npgs = (st.st_size / pgsize) + 1;
+
+	printf("    CHECKING RESIDENCY\n");
+
+	(void) check_residency(addr, npgs);
+
+	printf("    LOCKING RANGE\n");
+
+	if (mlock(addr, npgs * pgsize) == -1)
+		err(1, "mlock %s", filename);
+
+	printf("    CHECKING RESIDENCY\n");
+
+	if (check_residency(addr, npgs) != npgs) {
+		printf("    RESIDENCY CHECK FAILED!\n");
+		ecode = 1;
+	}
+
+	printf("    UNLOCKING RANGE\n");
+
+	if (munlock(addr, pgsize) == -1)
+		err(1, "munlock %s", filename);
+
+	(void) munmap(addr, st.st_size);
+
+	/*
+	 * TEST MLOCKALL'ING AN ANONYMOUS MEMORY RANGE.
+	 */
+
+	npgs = 128;
+
+	printf(">>> MAPPING %d PAGE ANONYMOUS REGION <<<\n", npgs);
+
+	addr = mmap(NULL, npgs * pgsize, PROT_READ|PROT_WRITE,
+	    MAP_ANON|MAP_PRIVATE, -1, (off_t) 0);
+	if (addr == MAP_FAILED)
+		err(1, "mmap anon #1");
+
+	printf("    CHECKING RESIDENCY\n");
+
+	if (check_residency(addr, npgs) != 0) {
+		printf("    RESIDENCY CHECK FAILED!\n");
+		ecode = 1;
+	}
+
+	printf("    LOCKING ALL - CURRENT and FUTURE\n");
+
+	if (mlockall(MCL_CURRENT|MCL_FUTURE) == -1)
+		err(1, "mlockall current/future");
+
+	printf("    CHECKING RESIDENCY\n");
+
+	if (check_residency(addr, npgs) != npgs) {
+		printf("    RESIDENCY CHECK FAILED!\n");
+		ecode = 1;
+	}
+
+	printf(">>> MAPPING ANOTHER %d PAGE ANONYMOUS REGION <<<\n", npgs);
+
+	addr2 = mmap(NULL, npgs * pgsize, PROT_READ, MAP_ANON, -1, (off_t) 0);
+	if (addr == MAP_FAILED)
+		err(1, "mmap anon #2");
+
+	printf("    CHECKING RESIDENCY\n");
+
+	if (check_residency(addr2, npgs) != npgs) {
+		printf("    RESIDENCY CHECK FAILED!\n");
+		ecode = 1;
+	}
+
+	printf(">>> MAPPING THIRD %d PAGE ANONYMOUS REGION, PROT_NONE <<<\n",
+	    npgs);
+
+	addr3 = mmap(NULL, npgs * pgsize, PROT_NONE, MAP_ANON, -1, (off_t) 0);
+	if (addr3 == MAP_FAILED)
+		err(1, "mmap anon #3");
+
+	printf("    CHECKING RESIDENCY\n");
+
+	if (check_residency(addr3, npgs) != 0) {
+		printf("    RESIDENCY CHECK FAILED!\n");
+		ecode = 1;
+	}
+
+	printf("    PROT_READ'ING MAPPING\n");
+
+	if (mprotect(addr3, npgs * pgsize, PROT_READ) == -1)
+		err(1, "mprotect");
+
+	printf("    CHECKING RESIDENCY\n");
+
+	if (check_residency(addr3, npgs) != npgs) {
+		printf("    RESIDENCY CHECK FAILED!\n");
+		ecode = 1;
+	}
+
+	printf("    UNLOCKING ALL\n");
+
+	printf("    CHECKING RESIDENCY\n");
+
+	if (check_residency(addr, npgs) != npgs ||
+	    check_residency(addr2, npgs) != npgs) {
+		printf("    RESIDENCY CHECK FAILED!\n");
+		ecode = 1;
+	}
+
+	(void) munlockall();
+
+	printf(">>> MADV_FREE'ING SECOND ANONYMOUS REGION <<<\n");
+
+	if (madvise(addr2, npgs * pgsize, MADV_FREE) == -1)
+		err(1, "madvise");
+
+	printf("    CHECKING RESIDENCY\n");
+
+	if (check_residency(addr2, npgs) != 0) {
+		printf("    RESIDENCY CHECK FAILED!\n");
+		ecode = 1;
+	}
+
+	printf(">>> MADV_FREE'ING FIRST ANONYMOUS REGION <<<\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;
+	}
+
+	printf(">>> ZEROING FIRST ANONYMOUS REGION <<<\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 FIRST ANONYMOUS REGION AGAIN <<<\n");
+
+	if (madvise(addr, npgs * pgsize, MADV_FREE) == -1)
+		err(1, "madvise");
+
+	printf("    CHECKING RESIDENCY\n");
+
+	if (check_residency(addr2, npgs) != 0) {
+		printf("    RESIDENCY CHECK FAILED!\n");
+		ecode = 1;
+	}
+
+	printf(">>> UNMAPPING ANONYMOUS REGIONS <<<\n");
+
+	(void) munmap(addr, npgs * pgsize);
+	(void) munmap(addr2, npgs * pgsize);
+	(void) munmap(addr3, npgs * pgsize);
+
+	printf(">>> CREATING MAPPED FILE <<<\n");
+
+	(void) unlink(MAPPED_FILE);
+
+	if ((fd = open(MAPPED_FILE, O_RDWR|O_CREAT|O_TRUNC, 0666)) == -1)
+		err(1, "open %s", MAPPED_FILE);
+
+	if ((cp = malloc(npgs * pgsize)) == NULL)
+		err(1, "malloc %d bytes", npgs * pgsize);
+
+	memset(cp, 0x01, npgs * pgsize);
+
+	if (write(fd, cp, npgs * pgsize) != npgs * pgsize)
+		err(1, "write %s", MAPPED_FILE);
+
+	addr = mmap(NULL, npgs * pgsize, PROT_READ|PROT_WRITE,
+	    MAP_FILE|MAP_SHARED, fd, (off_t) 0);
+	if (addr == MAP_FAILED)
+		err(1, "mmap %s", MAPPED_FILE);
+
+	(void) close(fd);
+
+	printf("    WRITING TEST PATTERN\n");
+
+	for (i = 0; i < npgs * pgsize; i++)
+		((u_int8_t *)addr)[i] = TEST_PATTERN;
+
+	printf("    SYNCING FILE\n");
+
+	if (msync(addr, npgs * pgsize, MS_SYNC|MS_INVALIDATE) == -1)
+		err(1, "msync %s", MAPPED_FILE);
+
+	printf("    UNMAPPING FILE\n");
+
+	(void) munmap(addr, npgs * pgsize);
+
+	printf("    READING FILE\n");
+
+	if ((fd = open(MAPPED_FILE, O_RDONLY, 0666)) == -1)
+		err(1, "open %s", MAPPED_FILE);
+
+	if (read(fd, cp, npgs * pgsize) != npgs * pgsize)
+		err(1, "read %s", MAPPED_FILE);
+
+	(void) close(fd);
+
+	printf("    CHECKING TEST PATTERN\n");
+
+	for (i = 0; i < npgs * pgsize; i++) {
+		if (cp[i] != TEST_PATTERN) {
+			printf("    INCORRECT BYTE AT OFFSET %d: "
+			    "0x%02x should be 0x%02x\n", i, cp[i],
+			    TEST_PATTERN);
+			ecode = 1;
+			break;
+		}
+	}
+
+	printf(">>> CREATING SYSV SHM SEGMENT <<<\n");
+
+	if ((shmid = shmget(IPC_PRIVATE, npgs * pgsize,
+	    IPC_CREAT|S_IRUSR|S_IWUSR)) == -1)
+		err(1, "shmget");
+
+	if ((addr = shmat(shmid, NULL, 0)) == (void *) -1)
+		err(1, "shmat");
+
+	printf("    CHECKING RESIDENCY\n");
+
+	if (check_residency(addr, npgs) != 0) {
+		printf("    RESIDENCY CHECK FAILED!\n");
+		ecode = 1;
+	}
+
+	printf("    ZEROING SEGMENT\n");
+
+	memset(addr, 0xff, 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");
+
+	/*
+	 * NOTE!  Even though we have MADV_FREE'd the range,
+	 * there is another reference (the kernel's) to the
+	 * object which owns the pages.  In this case, the
+	 * kernel does not simply free the pages, as haphazardly
+	 * freeing pages when there are still references to
+	 * an object can cause data corruption (say, the other
+	 * referencer doesn't expect the pages to be freed,
+	 * and is surprised by the subsequent ZFOD).
+	 *
+	 * Because of this, we simply report the number of
+	 * pages still resident, for information only.
+	 */
+
+	npgs = check_residency(addr, npgs);
+	printf("    RESIDENCY CHECK: %d pages still resident\n", npgs);
+
+	if (shmdt(addr) == -1)
+		warn("shmdt");
+	if (shmctl(shmid, IPC_RMID, NULL) == -1)
+		err(1, "shmctl");
+
+	exit(ecode);
+}
+
+int
+check_residency(addr, npgs)
+	void *addr;
+	int npgs;
+{
+	char *vec;
+	int i, resident;
+
+	vec = malloc(npgs);
+	if (vec == NULL)
+		err(1, "malloc mincore vec");
+
+	if (mincore(addr, npgs * pgsize, vec) == -1)
+		err(1, "mincore");
+
+	for (i = 0, resident = 0; i < npgs; i++) {
+		if (vec[i] != 0)
+			resident++;
+		if (verbose)
+			printf("page 0x%lx is %sresident\n",
+			    addr + (i * pgsize), vec[i] ? "" : "not ");
+	}
+
+	free(vec);
+
+	return (resident);
+}
+
+void
+usage()
+{
+
+	fprintf(stderr, "usage: mmap [-v] filename\n");
+	exit(1);
+}