JDK-8012335 : G1: TemplateInterpreter do_oop_store passes a compressed oop to g1_write_barrier_post
- Type: Bug
- Component: hotspot
- Sub-Component: gc
- Affected Version: hs25
- Priority: P3
- Status: Resolved
- Resolution: Fixed
- Submitted: 2013-04-16
- Updated: 2013-09-18
- Resolved: 2013-04-18
The Version table provides details related to the release that this issue/RFE will be addressed.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
| JDK 7 | JDK 8 | Other |
|---|---|---|
7u40Fixed  |
8Fixed |
hs24Fixed |
Description
SAP found a G1 bug in the template interpreter on x86_64 and sparc with compressed Oops. ���do_oop_store��� performs a ���store_heap_oop��� which compresses the input register. This compressed Oop is passed to the succeeding g1_write_barrier_post, which is wrong. Correctly, g1_write_barrier_post needs the uncompressed Oop for the heap region crossing check. This fix preserves the uncompressed Oop in a register which gets passed to the g1_write_barrier_post: http://cr.openjdk.java.net/~goetz/webrevs/g1-cOops_bug/
Comments
|