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make/linux/README@2c022e432e10 (annotated)
make/linux/README
Fri, 20 Sep 2013 10:53:28 +0200
- author
- stefank
- date
- Fri, 20 Sep 2013 10:53:28 +0200
- changeset 5769
- 2c022e432e10
- parent 3058
- 3be7439273c5
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
8024974: Incorrect use of GC_locker::is_active()
Summary: SymbolTable and StringTable can make calls to GC_locker::is_active() outside a safepoint. This isn't safe because the GC_locker active state (lock count) is only updated at a safepoint and only remains valid as long as _needs_gc is true. However, outside a safepoint_needs_gc can change to false at any time, which makes it impossible to do a correct call to is_active() in that context. In this case these calls can just be removed since the input argument to basic_add() should never be on the heap and so there's no need to check the GC_locker state. This change also adjusts the assert() in is_active() to makes sure all calls to this function are always done under a safepoint.
Reviewed-by: brutisso, dcubed
Contributed-by: per.liden@oracle.com
| katleman@3058 | 1 | Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 2 | DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 3 | |
| duke@435 | 4 | This code is free software; you can redistribute it and/or modify it |
| duke@435 | 5 | under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 6 | published by the Free Software Foundation. |
| duke@435 | 7 | |
| duke@435 | 8 | This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 9 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 10 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 11 | version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 12 | accompanied this code). |
| duke@435 | 13 | |
| duke@435 | 14 | You should have received a copy of the GNU General Public License version |
| duke@435 | 15 | 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 16 | Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 17 | |
| trims@1907 | 18 | Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 19 | or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 20 | questions. |
| duke@435 | 21 | |
| duke@435 | 22 | ________________________________________________________________________ |
| duke@435 | 23 | |
| duke@435 | 24 | Please refer to the comments in the Makefile in this directory |
| duke@435 | 25 | for instructions how to build the Solaris versions. |
| duke@435 | 26 |
