Mercurial > jdk8-mips64-public > hotspot / annotate
ASSEMBLY_EXCEPTION@72f725c5a7be (annotated)
ASSEMBLY_EXCEPTION
Mon, 05 Apr 2010 12:19:22 -0400
- author
- tonyp
- date
- Mon, 05 Apr 2010 12:19:22 -0400
- changeset 1793
- 72f725c5a7be
- parent 435
- a61af66fc99e
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
Summary: Calling the methods region_stack_push() and region_stack_pop() concurrent is not MT-safe. The assumption is that we will only call region_stack_push() during a GC pause and region_stack_pop() during marking. Unfortunately, we also call region_stack_push() during marking which seems to be introducing subtle marking failures. This change introduces lock-based methods for pushing / popping to be called during marking.
Reviewed-by: iveresov, johnc
| duke@435 | 1 | |
| duke@435 | 2 | OPENJDK ASSEMBLY EXCEPTION |
| duke@435 | 3 | |
| duke@435 | 4 | The OpenJDK source code made available by Sun at openjdk.java.net and |
| duke@435 | 5 | openjdk.dev.java.net ("OpenJDK Code") is distributed under the terms of the |
| duke@435 | 6 | GNU General Public License <http://www.gnu.org/copyleft/gpl.html> version 2 |
| duke@435 | 7 | only ("GPL2"), with the following clarification and special exception. |
| duke@435 | 8 | |
| duke@435 | 9 | Linking this OpenJDK Code statically or dynamically with other code |
| duke@435 | 10 | is making a combined work based on this library. Thus, the terms |
| duke@435 | 11 | and conditions of GPL2 cover the whole combination. |
| duke@435 | 12 | |
| duke@435 | 13 | As a special exception, Sun gives you permission to link this |
| duke@435 | 14 | OpenJDK Code with certain code licensed by Sun as indicated at |
| duke@435 | 15 | http://openjdk.java.net/legal/exception-modules-2007-05-08.html |
| duke@435 | 16 | ("Designated Exception Modules") to produce an executable, |
| duke@435 | 17 | regardless of the license terms of the Designated Exception Modules, |
| duke@435 | 18 | and to copy and distribute the resulting executable under GPL2, |
| duke@435 | 19 | provided that the Designated Exception Modules continue to be |
| duke@435 | 20 | governed by the licenses under which they were offered by Sun. |
| duke@435 | 21 | |
| duke@435 | 22 | As such, it allows licensees and sublicensees of Sun's GPL2 OpenJDK Code to |
| duke@435 | 23 | build an executable that includes those portions of necessary code that Sun |
| duke@435 | 24 | could not provide under GPL2 (or that Sun has provided under GPL2 with the |
| duke@435 | 25 | Classpath exception). If you modify or add to the OpenJDK code, that new |
| duke@435 | 26 | GPL2 code may still be combined with Designated Exception Modules if the |
| duke@435 | 27 | new code is made subject to this exception by its copyright holder. |
