[src/trunk]: src/regress/sys/uvm/mmap Add some code to test sync'ing a PROT_W...

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e1d27497bae2
branches:  trunk
changeset: 474657:e1d27497bae2
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Wed Jul 14 21:10:13 1999 +0000

description:
Add some code to test sync'ing a PROT_WRITE+MAP_SHARED file.

diffstat:

 regress/sys/uvm/mmap/Makefile |   4 +-
 regress/sys/uvm/mmap/mmap.c   |  71 +++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 72 insertions(+), 3 deletions(-)

diffs (115 lines):

diff -r a9b288d4b058 -r e1d27497bae2 regress/sys/uvm/mmap/Makefile
--- a/regress/sys/uvm/mmap/Makefile     Wed Jul 14 21:06:30 1999 +0000
+++ b/regress/sys/uvm/mmap/Makefile     Wed Jul 14 21:10:13 1999 +0000
@@ -1,8 +1,10 @@
-#      $NetBSD: Makefile,v 1.1 1999/06/19 00:53:32 thorpej Exp $
+#      $NetBSD: Makefile,v 1.2 1999/07/14 21:10:13 thorpej Exp $
 
 PROG=  mmap
 MKMAN= no
 
+CLEANFILES+= mapped_file
+
 # This is hopefully just some file not mmap'd very often.
 SOME_FILE=/usr/share/misc/zipcodes
 
diff -r a9b288d4b058 -r e1d27497bae2 regress/sys/uvm/mmap/mmap.c
--- a/regress/sys/uvm/mmap/mmap.c       Wed Jul 14 21:06:30 1999 +0000
+++ b/regress/sys/uvm/mmap/mmap.c       Wed Jul 14 21:10:13 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mmap.c,v 1.2 1999/07/07 22:00:31 thorpej Exp $ */
+/*     $NetBSD: mmap.c,v 1.3 1999/07/14 21:10:13 thorpej Exp $ */
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -60,6 +60,9 @@
 int    pgsize;
 int    verbose;
 
+#define        MAPPED_FILE     "mapped_file"
+#define        TEST_PATTERN    0xa5
+
 int
 main(argc, argv)
        int argc;
@@ -67,8 +70,9 @@
 {
        struct stat st;
        void *addr, *addr2;
-       int ch, ecode, fd, npgs;
+       int i, ch, ecode, fd, npgs;
        const char *filename;
+       u_int8_t *cp;
 
        while ((ch = getopt(argc, argv, "v")) != -1) {
                switch (ch) {
@@ -223,6 +227,69 @@
                ecode = 1;
        }
 
+       printf(">>> UNMAPPING ANONYMOUS REGIONS <<<\n");
+
+       (void) munmap(addr, npgs * pgsize);
+       (void) munmap(addr2, 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;
+               }
+       }
+
        exit(ecode);
 }