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Bug
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Resolution: Fixed
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P3
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hs25
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b29
| Issue | Fix Version | Assignee | Priority | Status | Resolution | Resolved In Build |
|---|---|---|---|---|---|---|
| JDK-8013660 | 8 | John Cuthbertson | P3 | Resolved | Fixed | b88 |
| JDK-8018342 | 7u45 | John Cuthbertson | P3 | Closed | Fixed | b01 |
| JDK-8014609 | 7u40 | John Cuthbertson | P3 | Resolved | Fixed | b25 |
| JDK-8014194 | hs24 | John Cuthbertson | P3 | Resolved | Fixed | b44 |
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/
“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/
- backported by
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JDK-8013660 G1: TemplateInterpreter do_oop_store passes a compressed oop to g1_write_barrier_post
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- Resolved
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- Resolved
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- Resolved
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- Closed
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