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8138659: Speed up InstanceKlass subclass discrimination

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Add _misc_kind field and flags, move around predicates.

Reviewed-by: coleenp, stefank
This commit is contained in:
Kim Barrett 2015-10-09 14:08:15 -04:00
parent aeffdfc249
commit 37125920a7
9 changed files with 88 additions and 40 deletions
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11
hotspot/src/share/vm/oops/instanceRefKlass.hpp
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@ -51,18 +51,11 @@ class InstanceRefKlass: public InstanceKlass {
// Constructor
InstanceRefKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)
: InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}
: InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size,
InstanceKlass::_misc_kind_reference, rt, access_flags, is_anonymous) {}
public:
InstanceRefKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
// Type testing
bool oop_is_instanceRef() const { return true; }
// Casting from Klass*
static InstanceRefKlass* cast(Klass* k) {
assert(k->oop_is_instanceRef(), "cast to InstanceRefKlass");
return (InstanceRefKlass*) k;
}
// GC specific object visitors
//