Mercurial > jdk8-mips64-public > hotspot / annotate
README@2c022e432e10 (annotated)
README
Fri, 20 Sep 2013 10:53:28 +0200
- author
- stefank
- date
- Fri, 20 Sep 2013 10:53:28 +0200
- changeset 5769
- 2c022e432e10
- parent 0
- f90c822e73f8
- 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
| aoqi@0 | 1 | README: |
| aoqi@0 | 2 | This file should be located at the top of the hotspot Mercurial repository. |
| aoqi@0 | 3 | |
| aoqi@0 | 4 | See http://openjdk.java.net/ for more information about the OpenJDK. |
| aoqi@0 | 5 | |
| aoqi@0 | 6 | See ../README-builds.html for complete details on build machine requirements. |
| aoqi@0 | 7 | |
| aoqi@0 | 8 | Simple Build Instructions: |
| aoqi@0 | 9 | |
| aoqi@0 | 10 | cd make && gnumake |
| aoqi@0 | 11 | |
| aoqi@0 | 12 | The files that will be imported into the jdk build will be in the "build" |
| aoqi@0 | 13 | directory. |
| aoqi@0 | 14 |
