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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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3
src/hotspot/share/opto/library_call.cpp
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@ -3453,7 +3453,8 @@ bool LibraryCallKit::inline_native_isInterrupted() {
// Given a klass oop, load its java mirror (a java.lang.Class oop).
Node* LibraryCallKit::load_mirror_from_klass(Node* klass) {
Node* p = basic_plus_adr(klass, in_bytes(Klass::java_mirror_offset()));
return make_load(NULL, p, TypeInstPtr::MIRROR, T_OBJECT, MemNode::unordered);
Node* load = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS, MemNode::unordered);
return make_load(NULL, load, TypeInstPtr::MIRROR, T_OBJECT, MemNode::unordered);
}
//-----------------------load_klass_from_mirror_common-------------------------