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8186777: Make Klass::_java_mirror an OopHandle

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Add indirection for fetching mirror so that GC doesn't have to follow CLD::_klasses

Co-authored-by: Rickard Backman <rickard.backman@oracle.com>
Reviewed-by: hseigel, thartmann, eosterlund, stefank
This commit is contained in:
Coleen Phillimore 2017-10-03 16:42:04 -04:00
parent e31bc5637a
commit 73a801bc43
61 changed files with 383 additions and 477 deletions
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4
src/hotspot/share/c1/c1_LIRGenerator.cpp
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@ -1304,7 +1304,9 @@ void LIRGenerator::do_getClass(Intrinsic* x) {
// FIXME T_ADDRESS should actually be T_METADATA but it can't because the
// meaning of these two is mixed up (see JDK-8026837).
__ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), temp, info);
__ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_OBJECT), result);
__ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_ADDRESS), result);
// mirror = ((OopHandle)mirror)->resolve();
__ move_wide(new LIR_Address(result, T_OBJECT), result);
}
// java.lang.Class::isPrimitive()