diff options
Diffstat (limited to 'winsup/testsuite/winsup.api/mmaptest01.c')
-rw-r--r-- | winsup/testsuite/winsup.api/mmaptest01.c | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/winsup/testsuite/winsup.api/mmaptest01.c b/winsup/testsuite/winsup.api/mmaptest01.c deleted file mode 100644 index b400db7f4..000000000 --- a/winsup/testsuite/winsup.api/mmaptest01.c +++ /dev/null @@ -1,106 +0,0 @@ -/* - Copyright 2001 Free Software Foundation, Inc. - Written by Michael Chastain, <chastain@redhat.com> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. - - This program demonstrates a bug in cygwin's mmap. - I open one file, mmap it, and close it. - I open a different file, mmap it, and close it. - - The second file re-uses the file handle (which is OK), - but then it re-uses the buffer as well! Ouch! - - This bug occurs on cygwin1.dll dated 2001-01-31. - It causes gnu cpp to screw up its include file buffers. - - Compile with "gcc -o y1 y1.c". - - Output from a bad cygwin1.dll: - - y1.txt: 3 0x4660000 y1 y1 y1 y1 y1 y1 y1 - y2.txt: 3 0x4660000 y1 y1 y1 y1 y1 y1 y1 - - Output from a good cygwin1.dll: - - y1.txt: 3 0x14060000 y1 y1 y1 y1 y1 y1 y1 - y2.txt: 3 0x14070000 y2 y2 y2 y2 y2 y2 y2 - - Output from Red Hat Linux 7: - - y1.txt: 3 0x40017000 y1 y1 y1 y1 y1 y1 y1 - y2.txt: 3 0x40018000 y2 y2 y2 y2 y2 y2 y2 - */ - -#include <sys/mman.h> -#include <fcntl.h> -#include <stdio.h> -#include <stdlib.h> - -/* some systems have O_BINARY and some do not */ -#ifndef O_BINARY -#define O_BINARY 0 -#endif - -/* filler for file 1 */ -char const line1 [] = "y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1\n"; -#define size1 (sizeof(line1) - 1) -#define count1 ((4096 / size1) + 1) - -/* filler for file 2 */ -char const line2 [] = "y2 y2 y2 y2 y2 y2 y2 y2 y2 y2 y2 y2 y2 y2 y2 y2 y2\n"; -#define size2 (sizeof(line2) - 1) -#define count2 ((4096 / size2) + 1) - -int main () -{ - int fd1; - char * buf1; - - int fd2; - char * buf2; - - int i; - - /* create file 1 */ - fd1 = open ("y1.txt", O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0644); - for (i = 0; i < count1; i++) - write (fd1, line1, size1); - close (fd1); - - /* create file 2 */ - fd2 = open ("y2.txt", O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0644); - for (i = 0; i < count2; i++) - write (fd2, line2, size2); - close (fd2); - - /* mmap file 1 */ - fd1 = open ("y1.txt", O_RDONLY | O_BINARY, 0644); - buf1 = mmap (0, 4096, PROT_READ, MAP_PRIVATE, fd1, 0); - close (fd1); - - /* mmap file 2 */ - fd2 = open ("y2.txt", O_RDONLY | O_BINARY, 0644); - buf2 = mmap (0, 4096, PROT_READ, MAP_PRIVATE, fd2, 0); - close (fd2); - - /* the buffers have to be different */ - if (buf1 == buf2 || !memcmp (buf1, buf2, 20)) - return 1; - - return 0; -} - |