JDK-7121073 : secondary_super_cache memory slice has incorrect bounds in flatten_alias_type
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: hs23
- Priority: P4
- Status: Closed
- Resolution: Fixed
- OS: solaris_10
- CPU: x86
- Submitted: 2011-12-13
- Updated: 2012-03-29
- Resolved: 2012-03-29
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| JDK 7 | JDK 8 | Other |
|---|---|---|
7u4Fixed  |
8Fixed |
hs23Fixed |
Description
The logic for smearing the type checking slice into a single slice has incorrect bounds because of partial removal of sizeof(klassOopDesc)
uint off2 = offset - Klass::primary_supers_offset_in_bytes();
if( offset == Type::OffsetBot ||
off2 < Klass::primary_super_limit()*wordSize ) {
offset = sizeof(oopDesc) +Klass::secondary_super_cache_offset_in_bytes();
tj = tk = TypeKlassPtr::make( TypePtr::NotNull, tk->klass(), offset );
}
}
off2 should also be subtracting sizeof(klassOopDesc)
Comments
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