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8189871: Refactor GC barriers to use declarative semantics

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Reviewed-by: pliden, rkennke, coleenp, dholmes, kbarrett, stefank
This commit is contained in:
Erik Österlund 2017-11-20 13:07:44 +01:00
parent 63122ba705
commit 3e5e2f03b1
45 changed files with 3458 additions and 806 deletions
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19
src/hotspot/share/classfile/javaClasses.cpp
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@ -3064,6 +3064,25 @@ void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream*
}
}
// Support for java_lang_ref_Reference
bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
assert(!oopDesc::is_null(obj), "sanity");
if (offset != java_lang_ref_Reference::referent_offset) {
return false;
}
Klass* k = obj->klass();
if (!k->is_instance_klass()) {
return false;
}
InstanceKlass* ik = InstanceKlass::cast(obj->klass());
bool is_reference = ik->reference_type() != REF_NONE;
assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
return is_reference;
}
// Support for java_lang_ref_SoftReference
jlong java_lang_ref_SoftReference::timestamp(oop ref) {