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7197672: There are issues with shared data on windows

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On Windows, set rw protection on the CDS file just before removing it.

Reviewed-by: dcubed, iklam
This commit is contained in:
Harold Seigel 2013-02-03 16:49:16 -05:00
parent 898965f458
commit 812262d16b
1 changed files with 8 additions and 7 deletions
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15
hotspot/src/share/vm/memory/filemap.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -210,13 +210,14 @@ void FileMapInfo::open_for_write() {
tty->print_cr(" %s", _full_path);
}
// Remove the existing file in case another process has it open.
remove(_full_path);
#ifdef _WINDOWS // if 0444 is used on Windows, then remove() will fail.
int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0744);
#else
int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0444);
#ifdef _WINDOWS // On Windows, need WRITE permission to remove the file.
chmod(_full_path, _S_IREAD | _S_IWRITE);
#endif
// Use remove() to delete the existing file because, on Unix, this will
// allow processes that have it open continued access to the file.
remove(_full_path);
int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0444);
if (fd < 0) {
fail_stop("Unable to create shared archive file %s.", _full_path);
}