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comparison src/share/vm/memory/filemap.cpp @ 7980:c4ef3380a70b

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7197672: There are issues with shared data on windows Summary: On Windows, set rw protection on the CDS file just before removing it. Reviewed-by: dcubed, iklam
author hseigel
date Sun, 03 Feb 2013 16:49:16 -0500
parents 561148896559
children 91bf0bdae37b
comparison
equal deleted inserted replaced
7978:a7f9a1195d86 7980:c4ef3380a70b
1 /* 1 /*
2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
208 if (PrintSharedSpaces) { 208 if (PrintSharedSpaces) {
209 tty->print_cr("Dumping shared data to file: "); 209 tty->print_cr("Dumping shared data to file: ");
210 tty->print_cr(" %s", _full_path); 210 tty->print_cr(" %s", _full_path);
211 } 211 }
212 212
213 // Remove the existing file in case another process has it open. 213 #ifdef _WINDOWS // On Windows, need WRITE permission to remove the file.
214 chmod(_full_path, _S_IREAD | _S_IWRITE);
215 #endif
216
217 // Use remove() to delete the existing file because, on Unix, this will
218 // allow processes that have it open continued access to the file.
214 remove(_full_path); 219 remove(_full_path);
215 #ifdef _WINDOWS // if 0444 is used on Windows, then remove() will fail.
216 int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0744);
217 #else
218 int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0444); 220 int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0444);
219 #endif
220 if (fd < 0) { 221 if (fd < 0) {
221 fail_stop("Unable to create shared archive file %s.", _full_path); 222 fail_stop("Unable to create shared archive file %s.", _full_path);
222 } 223 }
223 _fd = fd; 224 _fd = fd;
224 _file_offset = 0; 225 _file_offset = 0;