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8195650: Method references to VarHandle accessors

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Reviewed-by: jrose
This commit is contained in:
Paul Sandoz 2018-06-25 14:39:44 -07:00
parent f44956330d
commit 14651d9e02
6 changed files with 190 additions and 13 deletions
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20
src/hotspot/share/prims/methodHandles.cpp
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@ -491,6 +491,24 @@ vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Klass* klass, Symb
return vmIntrinsics::_none;
}
// Returns true if method is signature polymorphic and public
bool MethodHandles::is_signature_polymorphic_public_name(Klass* klass, Symbol* name) {
if (is_signature_polymorphic_name(klass, name)) {
InstanceKlass* iklass = InstanceKlass::cast(klass);
int me;
int ms = iklass->find_method_by_name(name, &me);
assert(ms != -1, "");
for (; ms < me; ms++) {
Method* m = iklass->methods()->at(ms);
int required = JVM_ACC_NATIVE | JVM_ACC_VARARGS | JVM_ACC_PUBLIC;
int flags = m->access_flags().as_int();
if ((flags & required) == required && ArgumentCount(m->signature()).size() == 1) {
return true;
}
}
}
return false;
}
// convert the external string or reflective type to an internal signature
Symbol* MethodHandles::lookup_signature(oop type_str, bool intern_if_not_found, TRAPS) {
@ -741,7 +759,7 @@ Handle MethodHandles::resolve_MemberName(Handle mname, Klass* caller,
vmIntrinsics::ID mh_invoke_id = vmIntrinsics::_none;
if ((flags & ALL_KINDS) == IS_METHOD &&
(defc == SystemDictionary::MethodHandle_klass()) &&
(defc == SystemDictionary::MethodHandle_klass() || defc == SystemDictionary::VarHandle_klass()) &&
(ref_kind == JVM_REF_invokeVirtual ||
ref_kind == JVM_REF_invokeSpecial ||
// static invocation mode is required for _linkToVirtual, etc.: