jrose@1145: /*
coleenp@4037:  * Copyright (c) 2008, 2012, Oracle and/or its affiliates. All rights reserved.
jrose@1145:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jrose@1145:  *
jrose@1145:  * This code is free software; you can redistribute it and/or modify it
jrose@1145:  * under the terms of the GNU General Public License version 2 only, as
jrose@1145:  * published by the Free Software Foundation.
jrose@1145:  *
jrose@1145:  * This code is distributed in the hope that it will be useful, but WITHOUT
jrose@1145:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jrose@1145:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jrose@1145:  * version 2 for more details (a copy is included in the LICENSE file that
jrose@1145:  * accompanied this code).
jrose@1145:  *
jrose@1145:  * You should have received a copy of the GNU General Public License version
jrose@1145:  * 2 along with this work; if not, write to the Free Software Foundation,
jrose@1145:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jrose@1145:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
jrose@1145:  *
jrose@1145:  */
jrose@1145: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "classfile/symbolTable.hpp"
jrose@2982: #include "compiler/compileBroker.hpp"
stefank@2314: #include "interpreter/interpreter.hpp"
never@2920: #include "interpreter/oopMapCache.hpp"
stefank@2314: #include "memory/allocation.inline.hpp"
stefank@2314: #include "memory/oopFactory.hpp"
sspitsyn@4965: #include "prims/jvmtiRedefineClassesTrace.hpp"
stefank@2314: #include "prims/methodHandles.hpp"
jrose@2982: #include "runtime/compilationPolicy.hpp"
stefank@2314: #include "runtime/javaCalls.hpp"
stefank@2314: #include "runtime/reflection.hpp"
stefank@2314: #include "runtime/signature.hpp"
stefank@2314: #include "runtime/stubRoutines.hpp"
stefank@2314: 
twisti@3969: 
jrose@1145: /*
jrose@1145:  * JSR 292 reference implementation: method handles
twisti@3969:  * The JDK 7 reference implementation represented method handle
twisti@3969:  * combinations as chains.  Each link in the chain had a "vmentry"
twisti@3969:  * field which pointed at a bit of assembly code which performed
twisti@3969:  * one transformation before dispatching to the next link in the chain.
twisti@3969:  *
twisti@3969:  * The current reference implementation pushes almost all code generation
twisti@3969:  * responsibility to (trusted) Java code.  A method handle contains a
twisti@3969:  * pointer to its "LambdaForm", which embodies all details of the method
twisti@3969:  * handle's behavior.  The LambdaForm is a normal Java object, managed
twisti@3969:  * by a runtime coded in Java.
jrose@1145:  */
jrose@1145: 
jrose@1145: bool MethodHandles::_enabled = false; // set true after successful native linkage
never@2950: MethodHandlesAdapterBlob* MethodHandles::_adapter_code = NULL;
twisti@1734: 
twisti@1734: //------------------------------------------------------------------------------
twisti@1734: // MethodHandles::generate_adapters
twisti@1734: //
twisti@2436: void MethodHandles::generate_adapters() {
twisti@2698:   if (!EnableInvokeDynamic || SystemDictionary::MethodHandle_klass() == NULL)  return;
twisti@1734: 
twisti@1734:   assert(_adapter_code == NULL, "generate only once");
twisti@1734: 
twisti@1734:   ResourceMark rm;
twisti@1734:   TraceTime timer("MethodHandles adapters generation", TraceStartupTime);
never@2950:   _adapter_code = MethodHandlesAdapterBlob::create(adapter_code_size);
twisti@1734:   if (_adapter_code == NULL)
ccheung@4993:     vm_exit_out_of_memory(adapter_code_size, OOM_MALLOC_ERROR,
ccheung@4993:                           "CodeCache: no room for MethodHandles adapters");
never@3255:   {
never@3255:     CodeBuffer code(_adapter_code);
never@3255:     MethodHandlesAdapterGenerator g(&code);
never@3255:     g.generate();
never@3255:     code.log_section_sizes("MethodHandlesAdapterBlob");
never@3255:   }
twisti@1734: }
twisti@1734: 
twisti@1734: //------------------------------------------------------------------------------
twisti@1734: // MethodHandlesAdapterGenerator::generate
twisti@1734: //
twisti@2436: void MethodHandlesAdapterGenerator::generate() {
twisti@1734:   // Generate generic method handle adapters.
twisti@3969:   // Generate interpreter entries
twisti@3969:   for (Interpreter::MethodKind mk = Interpreter::method_handle_invoke_FIRST;
twisti@3969:        mk <= Interpreter::method_handle_invoke_LAST;
twisti@3969:        mk = Interpreter::MethodKind(1 + (int)mk)) {
twisti@3969:     vmIntrinsics::ID iid = Interpreter::method_handle_intrinsic(mk);
twisti@3969:     StubCodeMark mark(this, "MethodHandle::interpreter_entry", vmIntrinsics::name_at(iid));
twisti@3969:     address entry = MethodHandles::generate_method_handle_interpreter_entry(_masm, iid);
twisti@3969:     if (entry != NULL) {
twisti@3969:       Interpreter::set_entry_for_kind(mk, entry);
never@2895:     }
twisti@3969:     // If the entry is not set, it will throw AbstractMethodError.
twisti@1734:   }
twisti@1734: }
twisti@1734: 
jrose@1145: void MethodHandles::set_enabled(bool z) {
jrose@1145:   if (_enabled != z) {
twisti@2698:     guarantee(z && EnableInvokeDynamic, "can only enable once, and only if -XX:+EnableInvokeDynamic");
jrose@1145:     _enabled = z;
jrose@1145:   }
jrose@1145: }
jrose@1145: 
jrose@1145: // MemberName support
jrose@1145: 
jrose@2639: // import java_lang_invoke_MemberName.*
jrose@1145: enum {
twisti@4866:   IS_METHOD            = java_lang_invoke_MemberName::MN_IS_METHOD,
twisti@4866:   IS_CONSTRUCTOR       = java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR,
twisti@4866:   IS_FIELD             = java_lang_invoke_MemberName::MN_IS_FIELD,
twisti@4866:   IS_TYPE              = java_lang_invoke_MemberName::MN_IS_TYPE,
twisti@4866:   CALLER_SENSITIVE     = java_lang_invoke_MemberName::MN_CALLER_SENSITIVE,
twisti@3969:   REFERENCE_KIND_SHIFT = java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT,
twisti@3969:   REFERENCE_KIND_MASK  = java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK,
twisti@4866:   SEARCH_SUPERCLASSES  = java_lang_invoke_MemberName::MN_SEARCH_SUPERCLASSES,
twisti@4866:   SEARCH_INTERFACES    = java_lang_invoke_MemberName::MN_SEARCH_INTERFACES,
twisti@3969:   ALL_KINDS      = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE
jrose@1145: };
jrose@1145: 
jrose@1862: Handle MethodHandles::new_MemberName(TRAPS) {
jrose@1862:   Handle empty;
jrose@1862:   instanceKlassHandle k(THREAD, SystemDictionary::MemberName_klass());
jrose@1862:   if (!k->is_initialized())  k->initialize(CHECK_(empty));
jrose@1862:   return Handle(THREAD, k->allocate_instance(THREAD));
jrose@1862: }
jrose@1862: 
sspitsyn@4965: oop MethodHandles::init_MemberName(Handle mname, Handle target) {
sspitsyn@4965:   Thread* thread = Thread::current();
sspitsyn@4965:   oop target_oop = target();
coleenp@4037:   Klass* target_klass = target_oop->klass();
twisti@3969:   if (target_klass == SystemDictionary::reflect_Field_klass()) {
jrose@1145:     oop clazz = java_lang_reflect_Field::clazz(target_oop); // fd.field_holder()
jrose@1145:     int slot  = java_lang_reflect_Field::slot(target_oop);  // fd.index()
jrose@1145:     int mods  = java_lang_reflect_Field::modifiers(target_oop);
twisti@3969:     oop type  = java_lang_reflect_Field::type(target_oop);
twisti@3969:     oop name  = java_lang_reflect_Field::name(target_oop);
sspitsyn@4965:     KlassHandle k(thread, java_lang_Class::as_Klass(clazz));
sspitsyn@4965:     intptr_t offset = InstanceKlass::cast(k())->field_offset(slot);
sspitsyn@4965:     return init_field_MemberName(mname, k, accessFlags_from(mods), type, name, offset);
twisti@3969:   } else if (target_klass == SystemDictionary::reflect_Method_klass()) {
twisti@3969:     oop clazz  = java_lang_reflect_Method::clazz(target_oop);
twisti@3969:     int slot   = java_lang_reflect_Method::slot(target_oop);
sspitsyn@4965:     KlassHandle k(thread, java_lang_Class::as_Klass(clazz));
sspitsyn@4965:     if (!k.is_null() && k->oop_is_instance()) {
sspitsyn@4965:       Method* m = InstanceKlass::cast(k())->method_with_idnum(slot);
sspitsyn@4965:       return init_method_MemberName(mname, m, true, k);
twisti@3969:     }
twisti@3969:   } else if (target_klass == SystemDictionary::reflect_Constructor_klass()) {
twisti@3969:     oop clazz  = java_lang_reflect_Constructor::clazz(target_oop);
twisti@3969:     int slot   = java_lang_reflect_Constructor::slot(target_oop);
sspitsyn@4965:     KlassHandle k(thread, java_lang_Class::as_Klass(clazz));
sspitsyn@4965:     if (!k.is_null() && k->oop_is_instance()) {
sspitsyn@4965:       Method* m = InstanceKlass::cast(k())->method_with_idnum(slot);
sspitsyn@4965:       return init_method_MemberName(mname, m, false, k);
twisti@3969:     }
twisti@3969:   } else if (target_klass == SystemDictionary::MemberName_klass()) {
twisti@3969:     // Note: This only works if the MemberName has already been resolved.
twisti@3969:     oop clazz        = java_lang_invoke_MemberName::clazz(target_oop);
twisti@3969:     int flags        = java_lang_invoke_MemberName::flags(target_oop);
coleenp@4037:     Metadata* vmtarget=java_lang_invoke_MemberName::vmtarget(target_oop);
twisti@3969:     intptr_t vmindex = java_lang_invoke_MemberName::vmindex(target_oop);
sspitsyn@4965:     KlassHandle k(thread, java_lang_Class::as_Klass(clazz));
twisti@3969:     int ref_kind     = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK;
twisti@3969:     if (vmtarget == NULL)  return NULL;  // not resolved
twisti@3969:     if ((flags & IS_FIELD) != 0) {
coleenp@4037:       assert(vmtarget->is_klass(), "field vmtarget is Klass*");
twisti@3969:       int basic_mods = (ref_kind_is_static(ref_kind) ? JVM_ACC_STATIC : 0);
twisti@3969:       // FIXME:  how does k (receiver_limit) contribute?
sspitsyn@4965:       KlassHandle k_vmtarget(thread, (Klass*)vmtarget);
sspitsyn@4965:       return init_field_MemberName(mname, k_vmtarget, accessFlags_from(basic_mods), NULL, NULL, vmindex);
twisti@3969:     } else if ((flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) {
coleenp@4037:       assert(vmtarget->is_method(), "method or constructor vmtarget is Method*");
sspitsyn@4965:       return init_method_MemberName(mname, (Method*)vmtarget, ref_kind_does_dispatch(ref_kind), k);
twisti@3969:     } else {
twisti@3969:       return NULL;
twisti@3969:     }
jrose@1145:   }
twisti@3969:   return NULL;
jrose@1145: }
jrose@1145: 
sspitsyn@4965: oop MethodHandles::init_method_MemberName(Handle mname, Method* m, bool do_dispatch,
sspitsyn@4965:                                           KlassHandle receiver_limit_h) {
sspitsyn@4965:   Klass* receiver_limit = receiver_limit_h();
twisti@3969:   AccessFlags mods = m->access_flags();
twisti@3969:   int flags = (jushort)( mods.as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
coleenp@4037:   int vmindex = Method::nonvirtual_vtable_index; // implies never any dispatch
coleenp@4037:   Klass* mklass = m->method_holder();
twisti@3969:   if (receiver_limit == NULL)
twisti@3969:     receiver_limit = mklass;
twisti@3969:   if (m->is_initializer()) {
twisti@3969:     flags |= IS_CONSTRUCTOR | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT);
twisti@3969:   } else if (mods.is_static()) {
twisti@3969:     flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT);
bharadwaj@4969:      // Get vindex from itable if method holder is an interface.
bharadwaj@4969:      if (m->method_holder()->is_interface()) {
bharadwaj@4960:        vmindex = klassItable::compute_itable_index(m);
bharadwaj@4960:      }
twisti@3969:   } else if (receiver_limit != mklass &&
hseigel@4278:              !receiver_limit->is_subtype_of(mklass)) {
twisti@3969:     return NULL;  // bad receiver limit
hseigel@4278:   } else if (receiver_limit->is_interface() &&
hseigel@4278:              mklass->is_interface()) {
twisti@3969:     flags |= IS_METHOD | (JVM_REF_invokeInterface << REFERENCE_KIND_SHIFT);
twisti@3969:     receiver_limit = mklass;  // ignore passed-in limit; interfaces are interconvertible
twisti@3969:     vmindex = klassItable::compute_itable_index(m);
hseigel@4278:   } else if (mklass != receiver_limit && mklass->is_interface()) {
twisti@3969:     flags |= IS_METHOD | (JVM_REF_invokeVirtual << REFERENCE_KIND_SHIFT);
twisti@3969:     // it is a miranda method, so m->vtable_index is not what we want
twisti@3969:     ResourceMark rm;
coleenp@4037:     klassVtable* vt = InstanceKlass::cast(receiver_limit)->vtable();
twisti@3969:     vmindex = vt->index_of_miranda(m->name(), m->signature());
twisti@3969:   } else if (!do_dispatch || m->can_be_statically_bound()) {
twisti@3969:     flags |= IS_METHOD | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT);
twisti@3969:   } else {
twisti@3969:     flags |= IS_METHOD | (JVM_REF_invokeVirtual << REFERENCE_KIND_SHIFT);
twisti@3969:     vmindex = m->vtable_index();
twisti@3969:   }
twisti@3969: 
twisti@4866:   // @CallerSensitive annotation detected
twisti@4866:   if (m->caller_sensitive()) {
twisti@4866:     flags |= CALLER_SENSITIVE;
twisti@4866:   }
twisti@4866: 
sspitsyn@4965:   oop mname_oop = mname();
twisti@4866:   java_lang_invoke_MemberName::set_flags(   mname_oop, flags);
twisti@3969:   java_lang_invoke_MemberName::set_vmtarget(mname_oop, m);
twisti@4866:   java_lang_invoke_MemberName::set_vmindex( mname_oop, vmindex);   // vtable/itable index
twisti@4866:   java_lang_invoke_MemberName::set_clazz(   mname_oop, receiver_limit->java_mirror());
twisti@3969:   // Note:  name and type can be lazily computed by resolve_MemberName,
twisti@3969:   // if Java code needs them as resolved String and MethodType objects.
twisti@3969:   // The clazz must be eagerly stored, because it provides a GC
coleenp@4037:   // root to help keep alive the Method*.
twisti@3969:   // If relevant, the vtable or itable value is stored as vmindex.
twisti@3969:   // This is done eagerly, since it is readily available without
twisti@3969:   // constructing any new objects.
twisti@3969:   // TO DO: maybe intern mname_oop
sspitsyn@4965:   m->method_holder()->add_member_name(mname);
sspitsyn@4965:   return mname();
twisti@3969: }
twisti@3969: 
sspitsyn@4965: Handle MethodHandles::init_method_MemberName(Handle mname, CallInfo& info, TRAPS) {
twisti@3969:   Handle empty;
twisti@3969:   if (info.resolved_appendix().not_null()) {
twisti@3969:     // The resolved MemberName must not be accompanied by an appendix argument,
twisti@3969:     // since there is no way to bind this value into the MemberName.
twisti@3969:     // Caller is responsible to prevent this from happening.
twisti@3969:     THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty);
twisti@3969:   }
twisti@3969:   methodHandle m = info.resolved_method();
twisti@3969:   KlassHandle defc = info.resolved_klass();
twisti@3969:   int vmindex = -1;
coleenp@4251:   if (defc->is_interface() && m->method_holder()->is_interface()) {
twisti@3969:     // LinkResolver does not report itable indexes!  (fix this?)
twisti@3969:     vmindex = klassItable::compute_itable_index(m());
twisti@3969:   } else if (m->can_be_statically_bound()) {
twisti@3969:     // LinkResolver reports vtable index even for final methods!
coleenp@4037:     vmindex = Method::nonvirtual_vtable_index;
twisti@3969:   } else {
twisti@3969:     vmindex = info.vtable_index();
twisti@3969:   }
sspitsyn@4965:   oop res = init_method_MemberName(mname, m(), (vmindex >= 0), defc());
twisti@3969:   assert(res == NULL || (java_lang_invoke_MemberName::vmindex(res) == vmindex), "");
twisti@3969:   return Handle(THREAD, res);
twisti@3969: }
twisti@3969: 
sspitsyn@4965: oop MethodHandles::init_field_MemberName(Handle mname, KlassHandle field_holder,
twisti@3969:                                          AccessFlags mods, oop type, oop name,
twisti@3969:                                          intptr_t offset, bool is_setter) {
twisti@3969:   int flags = (jushort)( mods.as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS );
twisti@3969:   flags |= IS_FIELD | ((mods.is_static() ? JVM_REF_getStatic : JVM_REF_getField) << REFERENCE_KIND_SHIFT);
twisti@3969:   if (is_setter)  flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT);
sspitsyn@4965:   Metadata* vmtarget = field_holder();
twisti@3969:   int vmindex  = offset;  // determines the field uniquely when combined with static bit
sspitsyn@4965:   oop mname_oop = mname();
twisti@3969:   java_lang_invoke_MemberName::set_flags(mname_oop,    flags);
jrose@2639:   java_lang_invoke_MemberName::set_vmtarget(mname_oop, vmtarget);
jrose@2639:   java_lang_invoke_MemberName::set_vmindex(mname_oop,  vmindex);
hseigel@4278:   java_lang_invoke_MemberName::set_clazz(mname_oop,    field_holder->java_mirror());
twisti@3969:   if (name != NULL)
twisti@3969:     java_lang_invoke_MemberName::set_name(mname_oop,   name);
twisti@3969:   if (type != NULL)
twisti@3969:     java_lang_invoke_MemberName::set_type(mname_oop,   type);
twisti@3969:   // Note:  name and type can be lazily computed by resolve_MemberName,
twisti@3969:   // if Java code needs them as resolved String and Class objects.
twisti@3969:   // Note that the incoming type oop might be pre-resolved (non-null).
twisti@3969:   // The base clazz and field offset (vmindex) must be eagerly stored,
twisti@3969:   // because they unambiguously identify the field.
twisti@3969:   // Although the fieldDescriptor::_index would also identify the field,
twisti@3969:   // we do not use it, because it is harder to decode.
twisti@3969:   // TO DO: maybe intern mname_oop
sspitsyn@4965:   InstanceKlass::cast(field_holder())->add_member_name(mname);
sspitsyn@4965:   return mname();
jrose@1145: }
jrose@1145: 
sspitsyn@4965: Handle MethodHandles::init_field_MemberName(Handle mname, FieldAccessInfo& info, TRAPS) {
twisti@3969:   return Handle();
coleenp@4037: #if 0 // FIXME
twisti@3969:   KlassHandle field_holder = info.klass();
twisti@3969:   intptr_t    field_offset = info.field_offset();
twisti@3969:   return init_field_MemberName(mname_oop, field_holder(),
twisti@3969:                                info.access_flags(),
twisti@3969:                                type, name,
twisti@3969:                                field_offset, false /*is_setter*/);
twisti@3969: #endif
jrose@1145: }
jrose@1145: 
jrose@1145: 
twisti@3969: // JVM 2.9 Special Methods:
twisti@3969: // A method is signature polymorphic if and only if all of the following conditions hold :
twisti@3969: // * It is declared in the java.lang.invoke.MethodHandle class.
twisti@3969: // * It has a single formal parameter of type Object[].
twisti@3969: // * It has a return type of Object.
twisti@3969: // * It has the ACC_VARARGS and ACC_NATIVE flags set.
coleenp@4037: bool MethodHandles::is_method_handle_invoke_name(Klass* klass, Symbol* name) {
twisti@3969:   if (klass == NULL)
twisti@3969:     return false;
twisti@3969:   // The following test will fail spuriously during bootstrap of MethodHandle itself:
twisti@3969:   //    if (klass != SystemDictionary::MethodHandle_klass())
twisti@3969:   // Test the name instead:
hseigel@4278:   if (klass->name() != vmSymbols::java_lang_invoke_MethodHandle())
twisti@3969:     return false;
twisti@3969:   Symbol* poly_sig = vmSymbols::object_array_object_signature();
coleenp@4037:   Method* m = InstanceKlass::cast(klass)->find_method(name, poly_sig);
twisti@3969:   if (m == NULL)  return false;
twisti@3969:   int required = JVM_ACC_NATIVE | JVM_ACC_VARARGS;
twisti@3969:   int flags = m->access_flags().as_int();
twisti@3969:   return (flags & required) == required;
jrose@1145: }
jrose@1145: 
twisti@3969: 
twisti@3969: Symbol* MethodHandles::signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid) {
twisti@3969:   assert(is_signature_polymorphic_intrinsic(iid), err_msg("iid=%d", iid));
twisti@3969:   switch (iid) {
twisti@3969:   case vmIntrinsics::_invokeBasic:      return vmSymbols::invokeBasic_name();
twisti@3969:   case vmIntrinsics::_linkToVirtual:    return vmSymbols::linkToVirtual_name();
twisti@3969:   case vmIntrinsics::_linkToStatic:     return vmSymbols::linkToStatic_name();
twisti@3969:   case vmIntrinsics::_linkToSpecial:    return vmSymbols::linkToSpecial_name();
twisti@3969:   case vmIntrinsics::_linkToInterface:  return vmSymbols::linkToInterface_name();
twisti@3969:   }
twisti@3969:   assert(false, "");
twisti@3969:   return 0;
twisti@3969: }
twisti@3969: 
twisti@3969: int MethodHandles::signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid) {
twisti@3969:   switch (iid) {
twisti@3969:   case vmIntrinsics::_invokeBasic:      return 0;
twisti@3969:   case vmIntrinsics::_linkToVirtual:    return JVM_REF_invokeVirtual;
twisti@3969:   case vmIntrinsics::_linkToStatic:     return JVM_REF_invokeStatic;
twisti@3969:   case vmIntrinsics::_linkToSpecial:    return JVM_REF_invokeSpecial;
twisti@3969:   case vmIntrinsics::_linkToInterface:  return JVM_REF_invokeInterface;
twisti@3969:   }
twisti@3969:   assert(false, err_msg("iid=%d", iid));
twisti@3969:   return 0;
twisti@3969: }
twisti@3969: 
twisti@3969: vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Symbol* name) {
twisti@3969:   vmSymbols::SID name_id = vmSymbols::find_sid(name);
twisti@3969:   switch (name_id) {
twisti@3969:   // The ID _invokeGeneric stands for all non-static signature-polymorphic methods, except built-ins.
twisti@3969:   case vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name):           return vmIntrinsics::_invokeGeneric;
twisti@3969:   // The only built-in non-static signature-polymorphic method is MethodHandle.invokeBasic:
twisti@3969:   case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeBasic_name):      return vmIntrinsics::_invokeBasic;
twisti@3969: 
twisti@3969:   // There is one static signature-polymorphic method for each JVM invocation mode.
twisti@3969:   case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToVirtual_name):    return vmIntrinsics::_linkToVirtual;
twisti@3969:   case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToStatic_name):     return vmIntrinsics::_linkToStatic;
twisti@3969:   case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToSpecial_name):    return vmIntrinsics::_linkToSpecial;
twisti@3969:   case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToInterface_name):  return vmIntrinsics::_linkToInterface;
twisti@3969:   }
twisti@3969: 
twisti@3969:   // Cover the case of invokeExact and any future variants of invokeFoo.
coleenp@4037:   Klass* mh_klass = SystemDictionary::well_known_klass(
twisti@3969:                               SystemDictionary::WK_KLASS_ENUM_NAME(MethodHandle_klass) );
twisti@3969:   if (mh_klass != NULL && is_method_handle_invoke_name(mh_klass, name))
twisti@3969:     return vmIntrinsics::_invokeGeneric;
twisti@3969: 
twisti@3969:   // Note: The pseudo-intrinsic _compiledLambdaForm is never linked against.
twisti@3969:   // Instead it is used to mark lambda forms bound to invokehandle or invokedynamic.
twisti@3969:   return vmIntrinsics::_none;
twisti@3969: }
twisti@3969: 
coleenp@4037: vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Klass* klass, Symbol* name) {
twisti@3969:   if (klass != NULL &&
hseigel@4278:       klass->name() == vmSymbols::java_lang_invoke_MethodHandle()) {
twisti@3969:     vmIntrinsics::ID iid = signature_polymorphic_name_id(name);
twisti@3969:     if (iid != vmIntrinsics::_none)
twisti@3969:       return iid;
twisti@3969:     if (is_method_handle_invoke_name(klass, name))
twisti@3969:       return vmIntrinsics::_invokeGeneric;
twisti@3969:   }
twisti@3969:   return vmIntrinsics::_none;
twisti@3969: }
twisti@3969: 
twisti@3969: 
coleenp@2497: // convert the external string or reflective type to an internal signature
twisti@3969: Symbol* MethodHandles::lookup_signature(oop type_str, bool intern_if_not_found, TRAPS) {
jrose@2639:   if (java_lang_invoke_MethodType::is_instance(type_str)) {
twisti@3969:     return java_lang_invoke_MethodType::as_signature(type_str, intern_if_not_found, CHECK_NULL);
coleenp@2497:   } else if (java_lang_Class::is_instance(type_str)) {
coleenp@2497:     return java_lang_Class::as_signature(type_str, false, CHECK_NULL);
coleenp@2497:   } else if (java_lang_String::is_instance(type_str)) {
twisti@3969:     if (intern_if_not_found) {
coleenp@2497:       return java_lang_String::as_symbol(type_str, CHECK_NULL);
coleenp@2497:     } else {
coleenp@2497:       return java_lang_String::as_symbol_or_null(type_str);
coleenp@2497:     }
coleenp@2497:   } else {
coleenp@2497:     THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized type", NULL);
coleenp@2497:   }
coleenp@2497: }
coleenp@2497: 
twisti@3969: static const char OBJ_SIG[] = "Ljava/lang/Object;";
twisti@3969: enum { OBJ_SIG_LEN = 18 };
twisti@3969: 
twisti@3969: bool MethodHandles::is_basic_type_signature(Symbol* sig) {
twisti@3969:   assert(vmSymbols::object_signature()->utf8_length() == (int)OBJ_SIG_LEN, "");
twisti@3969:   assert(vmSymbols::object_signature()->equals(OBJ_SIG), "");
twisti@3969:   const int len = sig->utf8_length();
twisti@3969:   for (int i = 0; i < len; i++) {
twisti@3969:     switch (sig->byte_at(i)) {
twisti@3969:     case 'L':
twisti@3969:       // only java/lang/Object is valid here
twisti@3969:       if (sig->index_of_at(i, OBJ_SIG, OBJ_SIG_LEN) != i)
twisti@3969:         return false;
twisti@3969:       i += OBJ_SIG_LEN-1;  //-1 because of i++ in loop
twisti@3969:       continue;
twisti@3969:     case '(': case ')': case 'V':
twisti@3969:     case 'I': case 'J': case 'F': case 'D':
twisti@3969:       continue;
twisti@3969:     //case '[':
twisti@3969:     //case 'Z': case 'B': case 'C': case 'S':
twisti@3969:     default:
twisti@3969:       return false;
twisti@3969:     }
twisti@3969:   }
twisti@3969:   return true;
twisti@3969: }
twisti@3969: 
twisti@3969: Symbol* MethodHandles::lookup_basic_type_signature(Symbol* sig, bool keep_last_arg, TRAPS) {
twisti@3969:   Symbol* bsig = NULL;
twisti@3969:   if (sig == NULL) {
twisti@3969:     return sig;
twisti@3969:   } else if (is_basic_type_signature(sig)) {
twisti@3969:     sig->increment_refcount();
twisti@3969:     return sig;  // that was easy
twisti@3969:   } else if (sig->byte_at(0) != '(') {
twisti@3969:     BasicType bt = char2type(sig->byte_at(0));
twisti@3969:     if (is_subword_type(bt)) {
twisti@3969:       bsig = vmSymbols::int_signature();
twisti@3969:     } else {
twisti@3969:       assert(bt == T_OBJECT || bt == T_ARRAY, "is_basic_type_signature was false");
twisti@3969:       bsig = vmSymbols::object_signature();
twisti@3969:     }
twisti@3969:   } else {
twisti@3969:     ResourceMark rm;
twisti@3969:     stringStream buffer(128);
twisti@3969:     buffer.put('(');
twisti@3969:     int arg_pos = 0, keep_arg_pos = -1;
twisti@3969:     if (keep_last_arg)
twisti@3969:       keep_arg_pos = ArgumentCount(sig).size() - 1;
twisti@3969:     for (SignatureStream ss(sig); !ss.is_done(); ss.next()) {
twisti@3969:       BasicType bt = ss.type();
twisti@3969:       size_t this_arg_pos = buffer.size();
twisti@3969:       if (ss.at_return_type()) {
twisti@3969:         buffer.put(')');
twisti@3969:       }
twisti@3969:       if (arg_pos == keep_arg_pos) {
twisti@3969:         buffer.write((char*) ss.raw_bytes(),
twisti@3969:                      (int)   ss.raw_length());
twisti@3969:       } else if (bt == T_OBJECT || bt == T_ARRAY) {
twisti@3969:         buffer.write(OBJ_SIG, OBJ_SIG_LEN);
twisti@3969:       } else {
twisti@3969:         if (is_subword_type(bt))
twisti@3969:           bt = T_INT;
twisti@3969:         buffer.put(type2char(bt));
twisti@3969:       }
twisti@3969:       arg_pos++;
twisti@3969:     }
twisti@3969:     const char* sigstr =       buffer.base();
twisti@3969:     int         siglen = (int) buffer.size();
twisti@3969:     bsig = SymbolTable::new_symbol(sigstr, siglen, THREAD);
twisti@3969:   }
twisti@3969:   assert(is_basic_type_signature(bsig) ||
twisti@3969:          // detune assert in case the injected argument is not a basic type:
twisti@3969:          keep_last_arg, "");
twisti@3969:   return bsig;
twisti@3969: }
twisti@3969: 
twisti@3969: void MethodHandles::print_as_basic_type_signature_on(outputStream* st,
twisti@3969:                                                      Symbol* sig,
twisti@3969:                                                      bool keep_arrays,
twisti@3969:                                                      bool keep_basic_names) {
twisti@3969:   st = st ? st : tty;
twisti@3969:   int len  = sig->utf8_length();
twisti@3969:   int array = 0;
twisti@3969:   bool prev_type = false;
twisti@3969:   for (int i = 0; i < len; i++) {
twisti@3969:     char ch = sig->byte_at(i);
twisti@3969:     switch (ch) {
twisti@3969:     case '(': case ')':
twisti@3969:       prev_type = false;
twisti@3969:       st->put(ch);
twisti@3969:       continue;
twisti@3969:     case '[':
twisti@3969:       if (!keep_basic_names && keep_arrays)
twisti@3969:         st->put(ch);
twisti@3969:       array++;
twisti@3969:       continue;
twisti@3969:     case 'L':
twisti@3969:       {
twisti@3969:         if (prev_type)  st->put(',');
twisti@3969:         int start = i+1, slash = start;
twisti@3969:         while (++i < len && (ch = sig->byte_at(i)) != ';') {
twisti@3969:           if (ch == '/' || ch == '.' || ch == '$')  slash = i+1;
twisti@3969:         }
twisti@3969:         if (slash < i)  start = slash;
twisti@3969:         if (!keep_basic_names) {
twisti@3969:           st->put('L');
twisti@3969:         } else {
twisti@3969:           for (int j = start; j < i; j++)
twisti@3969:             st->put(sig->byte_at(j));
twisti@3969:           prev_type = true;
twisti@3969:         }
twisti@3969:         break;
twisti@3969:       }
twisti@3969:     default:
twisti@3969:       {
twisti@3969:         if (array && char2type(ch) != T_ILLEGAL && !keep_arrays) {
twisti@3969:           ch = '[';
twisti@3969:           array = 0;
twisti@3969:         }
twisti@3969:         if (prev_type)  st->put(',');
twisti@3969:         const char* n = NULL;
twisti@3969:         if (keep_basic_names)
twisti@3969:           n = type2name(char2type(ch));
twisti@3969:         if (n == NULL) {
twisti@3969:           // unknown letter, or we don't want to know its name
twisti@3969:           st->put(ch);
twisti@3969:         } else {
twisti@3969:           st->print(n);
twisti@3969:           prev_type = true;
twisti@3969:         }
twisti@3969:         break;
twisti@3969:       }
twisti@3969:     }
twisti@3969:     // Switch break goes here to take care of array suffix:
twisti@3969:     if (prev_type) {
twisti@3969:       while (array > 0) {
twisti@3969:         st->print("[]");
twisti@3969:         --array;
twisti@3969:       }
twisti@3969:     }
twisti@3969:     array = 0;
twisti@3969:   }
twisti@3969: }
twisti@3969: 
twisti@3969: 
twisti@3969: 
twisti@3969: static oop object_java_mirror() {
hseigel@4278:   return SystemDictionary::Object_klass()->java_mirror();
twisti@3969: }
twisti@3969: 
twisti@3969: static oop field_name_or_null(Symbol* s) {
twisti@3969:   if (s == NULL)  return NULL;
twisti@3969:   return StringTable::lookup(s);
twisti@3969: }
twisti@3969: 
twisti@3969: static oop field_signature_type_or_null(Symbol* s) {
twisti@3969:   if (s == NULL)  return NULL;
twisti@3969:   BasicType bt = FieldType::basic_type(s);
twisti@3969:   if (is_java_primitive(bt)) {
twisti@3969:     assert(s->utf8_length() == 1, "");
twisti@3969:     return java_lang_Class::primitive_mirror(bt);
twisti@3969:   }
twisti@3969:   // Here are some more short cuts for common types.
twisti@3969:   // They are optional, since reference types can be resolved lazily.
twisti@3969:   if (bt == T_OBJECT) {
twisti@3969:     if (s == vmSymbols::object_signature()) {
twisti@3969:       return object_java_mirror();
twisti@3969:     } else if (s == vmSymbols::class_signature()) {
hseigel@4278:       return SystemDictionary::Class_klass()->java_mirror();
twisti@3969:     } else if (s == vmSymbols::string_signature()) {
hseigel@4278:       return SystemDictionary::String_klass()->java_mirror();
twisti@3969:     }
twisti@3969:   }
twisti@3969:   return NULL;
twisti@3969: }
twisti@3969: 
coleenp@4037: 
jrose@1145: // An unresolved member name is a mere symbolic reference.
jrose@1145: // Resolving it plants a vmtarget/vmindex in it,
coleenp@4037: // which refers directly to JVM internals.
twisti@3969: Handle MethodHandles::resolve_MemberName(Handle mname, TRAPS) {
twisti@3969:   Handle empty;
jrose@2639:   assert(java_lang_invoke_MemberName::is_instance(mname()), "");
twisti@3969: 
twisti@3969:   if (java_lang_invoke_MemberName::vmtarget(mname()) != NULL) {
twisti@3969:     // Already resolved.
twisti@3969:     DEBUG_ONLY(int vmindex = java_lang_invoke_MemberName::vmindex(mname()));
coleenp@4037:     assert(vmindex >= Method::nonvirtual_vtable_index, "");
twisti@3969:     return mname;
twisti@3969:   }
twisti@3969: 
twisti@2806:   Handle defc_oop(THREAD, java_lang_invoke_MemberName::clazz(mname()));
twisti@2806:   Handle name_str(THREAD, java_lang_invoke_MemberName::name( mname()));
twisti@2806:   Handle type_str(THREAD, java_lang_invoke_MemberName::type( mname()));
twisti@2806:   int    flags    =       java_lang_invoke_MemberName::flags(mname());
twisti@3969:   int    ref_kind =       (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK;
twisti@3969:   if (!ref_kind_is_valid(ref_kind)) {
twisti@3969:     THROW_MSG_(vmSymbols::java_lang_InternalError(), "obsolete MemberName format", empty);
twisti@3969:   }
twisti@3969: 
twisti@3969:   DEBUG_ONLY(int old_vmindex);
twisti@3969:   assert((old_vmindex = java_lang_invoke_MemberName::vmindex(mname())) == 0, "clean input");
jrose@1145: 
twisti@2806:   if (defc_oop.is_null() || name_str.is_null() || type_str.is_null()) {
twisti@3969:     THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "nothing to resolve", empty);
jrose@1145:   }
twisti@2806: 
twisti@2806:   instanceKlassHandle defc;
twisti@2806:   {
coleenp@4037:     Klass* defc_klass = java_lang_Class::as_Klass(defc_oop());
coleenp@4037:     if (defc_klass == NULL)  return empty;  // a primitive; no resolution possible
hseigel@4278:     if (!defc_klass->oop_is_instance()) {
hseigel@4278:       if (!defc_klass->oop_is_array())  return empty;
coleenp@4037:       defc_klass = SystemDictionary::Object_klass();
twisti@2806:     }
coleenp@4037:     defc = instanceKlassHandle(THREAD, defc_klass);
jrose@1145:   }
jrose@1145:   if (defc.is_null()) {
twisti@3969:     THROW_MSG_(vmSymbols::java_lang_InternalError(), "primitive class", empty);
jrose@1145:   }
twisti@3969:   defc->link_class(CHECK_(empty));  // possible safepoint
jrose@1145: 
jrose@1145:   // convert the external string name to an internal symbol
twisti@2806:   TempNewSymbol name = java_lang_String::as_symbol_or_null(name_str());
twisti@3969:   if (name == NULL)  return empty;  // no such name
never@2978:   if (name == vmSymbols::class_initializer_name())
twisti@3969:     return empty; // illegal name
jrose@1145: 
twisti@3969:   vmIntrinsics::ID mh_invoke_id = vmIntrinsics::_none;
jrose@1863:   if ((flags & ALL_KINDS) == IS_METHOD &&
twisti@3969:       (defc() == SystemDictionary::MethodHandle_klass()) &&
twisti@3969:       (ref_kind == JVM_REF_invokeVirtual ||
twisti@3969:        ref_kind == JVM_REF_invokeSpecial ||
twisti@3969:        // static invocation mode is required for _linkToVirtual, etc.:
twisti@3969:        ref_kind == JVM_REF_invokeStatic)) {
twisti@3969:     vmIntrinsics::ID iid = signature_polymorphic_name_id(name);
twisti@3969:     if (iid != vmIntrinsics::_none &&
twisti@3969:         ((ref_kind == JVM_REF_invokeStatic) == is_signature_polymorphic_static(iid))) {
twisti@3969:       // Virtual methods invoke and invokeExact, plus internal invokers like _invokeBasic.
twisti@3969:       // For a static reference it could an internal linkage routine like _linkToVirtual, etc.
twisti@3969:       mh_invoke_id = iid;
twisti@3969:     }
twisti@2806:   }
jrose@1863: 
jrose@1145:   // convert the external string or reflective type to an internal signature
twisti@3969:   TempNewSymbol type = lookup_signature(type_str(), (mh_invoke_id != vmIntrinsics::_none), CHECK_(empty));
twisti@3969:   if (type == NULL)  return empty;  // no such signature exists in the VM
jrose@1145: 
jrose@1145:   // Time to do the lookup.
jrose@1145:   switch (flags & ALL_KINDS) {
jrose@1145:   case IS_METHOD:
jrose@1145:     {
jrose@1145:       CallInfo result;
twisti@3969:       bool do_dispatch = true;  // default, neutral setting
jrose@1145:       {
twisti@3969:         assert(!HAS_PENDING_EXCEPTION, "");
twisti@3969:         if (ref_kind == JVM_REF_invokeStatic) {
twisti@3969:           //do_dispatch = false;  // no need, since statics are never dispatched
jrose@1145:           LinkResolver::resolve_static_call(result,
jrose@1145:                         defc, name, type, KlassHandle(), false, false, THREAD);
twisti@3969:         } else if (ref_kind == JVM_REF_invokeInterface) {
jrose@1145:           LinkResolver::resolve_interface_call(result, Handle(), defc,
jrose@1145:                         defc, name, type, KlassHandle(), false, false, THREAD);
twisti@3969:         } else if (mh_invoke_id != vmIntrinsics::_none) {
twisti@3969:           assert(!is_signature_polymorphic_static(mh_invoke_id), "");
twisti@3969:           LinkResolver::resolve_handle_call(result,
twisti@3969:                         defc, name, type, KlassHandle(), THREAD);
twisti@3969:         } else if (ref_kind == JVM_REF_invokeSpecial) {
twisti@3969:           do_dispatch = false;  // force non-virtual linkage
twisti@3969:           LinkResolver::resolve_special_call(result,
twisti@3969:                         defc, name, type, KlassHandle(), false, THREAD);
twisti@3969:         } else if (ref_kind == JVM_REF_invokeVirtual) {
jrose@1145:           LinkResolver::resolve_virtual_call(result, Handle(), defc,
jrose@1145:                         defc, name, type, KlassHandle(), false, false, THREAD);
twisti@3969:         } else {
twisti@3969:           assert(false, err_msg("ref_kind=%d", ref_kind));
jrose@1145:         }
jrose@1145:         if (HAS_PENDING_EXCEPTION) {
twisti@3969:           return empty;
jrose@1145:         }
jrose@1145:       }
sspitsyn@4965:       return init_method_MemberName(mname, result, THREAD);
jrose@1145:     }
jrose@1145:   case IS_CONSTRUCTOR:
jrose@1145:     {
jrose@1145:       CallInfo result;
jrose@1145:       {
twisti@3969:         assert(!HAS_PENDING_EXCEPTION, "");
coleenp@2497:         if (name == vmSymbols::object_initializer_name()) {
jrose@1145:           LinkResolver::resolve_special_call(result,
jrose@1145:                         defc, name, type, KlassHandle(), false, THREAD);
jrose@1145:         } else {
jrose@1145:           break;                // will throw after end of switch
jrose@1145:         }
jrose@1145:         if (HAS_PENDING_EXCEPTION) {
twisti@3969:           return empty;
jrose@1145:         }
jrose@1145:       }
jrose@1145:       assert(result.is_statically_bound(), "");
sspitsyn@4965:       return init_method_MemberName(mname, result, THREAD);
jrose@1145:     }
jrose@1145:   case IS_FIELD:
jrose@1145:     {
jrose@1145:       // This is taken from LinkResolver::resolve_field, sans access checks.
jrose@1145:       fieldDescriptor fd; // find_field initializes fd if found
coleenp@4037:       KlassHandle sel_klass(THREAD, InstanceKlass::cast(defc())->find_field(name, type, &fd));
jrose@1145:       // check if field exists; i.e., if a klass containing the field def has been selected
twisti@3969:       if (sel_klass.is_null())  return empty;  // should not happen
twisti@3969:       oop type = field_signature_type_or_null(fd.signature());
twisti@3969:       oop name = field_name_or_null(fd.name());
twisti@3969:       bool is_setter = (ref_kind_is_valid(ref_kind) && ref_kind_is_setter(ref_kind));
twisti@3969:       mname = Handle(THREAD,
sspitsyn@4965:                      init_field_MemberName(mname, sel_klass,
twisti@3969:                                            fd.access_flags(), type, name, fd.offset(), is_setter));
twisti@3969:       return mname;
jrose@1145:     }
jrose@1863:   default:
twisti@3969:     THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty);
jrose@1145:   }
jrose@1863: 
twisti@3969:   return empty;
jrose@1145: }
jrose@1145: 
jrose@1145: // Conversely, a member name which is only initialized from JVM internals
jrose@1145: // may have null defc, name, and type fields.
jrose@1145: // Resolving it plants a vmtarget/vmindex in it,
jrose@1145: // which refers directly to JVM internals.
jrose@1145: void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) {
jrose@2639:   assert(java_lang_invoke_MemberName::is_instance(mname()), "");
coleenp@4037:   Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(mname());
jrose@2639:   int vmindex  = java_lang_invoke_MemberName::vmindex(mname());
twisti@3969:   if (vmtarget == NULL) {
jrose@1145:     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand");
jrose@1145:   }
jrose@1145: 
jrose@2639:   bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != NULL);
jrose@2639:   bool have_name = (java_lang_invoke_MemberName::name(mname()) != NULL);
jrose@2639:   bool have_type = (java_lang_invoke_MemberName::type(mname()) != NULL);
jrose@2639:   int flags      = java_lang_invoke_MemberName::flags(mname());
jrose@1145: 
jrose@1145:   if (suppress != 0) {
jrose@1145:     if (suppress & _suppress_defc)  have_defc = true;
jrose@1145:     if (suppress & _suppress_name)  have_name = true;
jrose@1145:     if (suppress & _suppress_type)  have_type = true;
jrose@1145:   }
jrose@1145: 
jrose@1145:   if (have_defc && have_name && have_type)  return;  // nothing needed
jrose@1145: 
jrose@1145:   switch (flags & ALL_KINDS) {
jrose@1145:   case IS_METHOD:
jrose@1145:   case IS_CONSTRUCTOR:
jrose@1145:     {
coleenp@4037:       assert(vmtarget->is_method(), "method or constructor vmtarget is Method*");
coleenp@4037:       methodHandle m(THREAD, (Method*)vmtarget);
twisti@3969:       DEBUG_ONLY(vmtarget = NULL);  // safety
jrose@1145:       if (m.is_null())  break;
jrose@1145:       if (!have_defc) {
coleenp@4251:         InstanceKlass* defc = m->method_holder();
coleenp@4251:         java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror());
jrose@1145:       }
jrose@1145:       if (!have_name) {
jrose@1145:         //not java_lang_String::create_from_symbol; let's intern member names
jrose@1145:         Handle name = StringTable::intern(m->name(), CHECK);
jrose@2639:         java_lang_invoke_MemberName::set_name(mname(), name());
jrose@1145:       }
jrose@1145:       if (!have_type) {
jrose@1145:         Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK);
jrose@2639:         java_lang_invoke_MemberName::set_type(mname(), type());
jrose@1145:       }
jrose@1145:       return;
jrose@1145:     }
jrose@1145:   case IS_FIELD:
jrose@1145:     {
jrose@1145:       // This is taken from LinkResolver::resolve_field, sans access checks.
coleenp@4037:       assert(vmtarget->is_klass(), "field vmtarget is Klass*");
hseigel@4278:       if (!((Klass*) vmtarget)->oop_is_instance())  break;
coleenp@4037:       instanceKlassHandle defc(THREAD, (Klass*) vmtarget);
twisti@3969:       DEBUG_ONLY(vmtarget = NULL);  // safety
jrose@1145:       bool is_static = ((flags & JVM_ACC_STATIC) != 0);
jrose@1145:       fieldDescriptor fd; // find_field initializes fd if found
jrose@1145:       if (!defc->find_field_from_offset(vmindex, is_static, &fd))
jrose@1145:         break;                  // cannot expand
jrose@1145:       if (!have_defc) {
jrose@2639:         java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror());
jrose@1145:       }
jrose@1145:       if (!have_name) {
jrose@1145:         //not java_lang_String::create_from_symbol; let's intern member names
jrose@1145:         Handle name = StringTable::intern(fd.name(), CHECK);
jrose@2639:         java_lang_invoke_MemberName::set_name(mname(), name());
jrose@1145:       }
jrose@1145:       if (!have_type) {
twisti@3969:         // If it is a primitive field type, don't mess with short strings like "I".
twisti@3969:         Handle type = field_signature_type_or_null(fd.signature());
twisti@3969:         if (type.is_null()) {
twisti@3969:           java_lang_String::create_from_symbol(fd.signature(), CHECK);
twisti@3969:         }
jrose@2639:         java_lang_invoke_MemberName::set_type(mname(), type());
jrose@1145:       }
jrose@1145:       return;
jrose@1145:     }
jrose@1145:   }
jrose@1145:   THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format");
jrose@1145: }
jrose@1145: 
sspitsyn@4965: int MethodHandles::find_MemberNames(KlassHandle k,
coleenp@2497:                                     Symbol* name, Symbol* sig,
sspitsyn@4965:                                     int mflags, KlassHandle caller,
sspitsyn@4965:                                     int skip, objArrayHandle results) {
jrose@1145:   // %%% take caller into account!
jrose@1145: 
sspitsyn@4965:   Thread* thread = Thread::current();
sspitsyn@4965: 
sspitsyn@4965:   if (k.is_null() || !k->oop_is_instance())  return -1;
jrose@1145: 
jrose@1145:   int rfill = 0, rlimit = results->length(), rskip = skip;
jrose@1145:   // overflow measurement:
jrose@1145:   int overflow = 0, overflow_limit = MAX2(1000, rlimit);
jrose@1145: 
jrose@1145:   int match_flags = mflags;
jrose@1145:   bool search_superc = ((match_flags & SEARCH_SUPERCLASSES) != 0);
jrose@1145:   bool search_intfc  = ((match_flags & SEARCH_INTERFACES)   != 0);
jrose@1145:   bool local_only = !(search_superc | search_intfc);
jrose@1145:   bool classes_only = false;
jrose@1145: 
jrose@1145:   if (name != NULL) {
jrose@1145:     if (name->utf8_length() == 0)  return 0; // a match is not possible
jrose@1145:   }
jrose@1145:   if (sig != NULL) {
jrose@1145:     if (sig->utf8_length() == 0)  return 0; // a match is not possible
jrose@1145:     if (sig->byte_at(0) == '(')
jrose@1145:       match_flags &= ~(IS_FIELD | IS_TYPE);
jrose@1145:     else
jrose@1145:       match_flags &= ~(IS_CONSTRUCTOR | IS_METHOD);
jrose@1145:   }
jrose@1145: 
jrose@1145:   if ((match_flags & IS_TYPE) != 0) {
jrose@1145:     // NYI, and Core Reflection works quite well for this query
jrose@1145:   }
jrose@1145: 
jrose@1145:   if ((match_flags & IS_FIELD) != 0) {
sspitsyn@4965:     for (FieldStream st(k(), local_only, !search_intfc); !st.eos(); st.next()) {
jrose@1145:       if (name != NULL && st.name() != name)
jrose@1145:           continue;
jrose@1145:       if (sig != NULL && st.signature() != sig)
jrose@1145:         continue;
jrose@1145:       // passed the filters
jrose@1145:       if (rskip > 0) {
jrose@1145:         --rskip;
jrose@1145:       } else if (rfill < rlimit) {
sspitsyn@4965:         Handle result(thread, results->obj_at(rfill++));
sspitsyn@4965:         if (!java_lang_invoke_MemberName::is_instance(result()))
jrose@1145:           return -99;  // caller bug!
twisti@3969:         oop type = field_signature_type_or_null(st.signature());
twisti@3969:         oop name = field_name_or_null(st.name());
sspitsyn@4965:         oop saved = MethodHandles::init_field_MemberName(result, st.klass(),
twisti@3969:                                                          st.access_flags(), type, name,
twisti@3969:                                                          st.offset());
sspitsyn@4965:         if (saved != result())
twisti@3969:           results->obj_at_put(rfill-1, saved);  // show saved instance to user
jrose@1145:       } else if (++overflow >= overflow_limit) {
jrose@1145:         match_flags = 0; break; // got tired of looking at overflow
jrose@1145:       }
jrose@1145:     }
jrose@1145:   }
jrose@1145: 
jrose@1145:   if ((match_flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) {
jrose@1145:     // watch out for these guys:
coleenp@2497:     Symbol* init_name   = vmSymbols::object_initializer_name();
coleenp@2497:     Symbol* clinit_name = vmSymbols::class_initializer_name();
jrose@1145:     if (name == clinit_name)  clinit_name = NULL; // hack for exposing <clinit>
jrose@1145:     bool negate_name_test = false;
jrose@1145:     // fix name so that it captures the intention of IS_CONSTRUCTOR
jrose@1145:     if (!(match_flags & IS_METHOD)) {
jrose@1145:       // constructors only
jrose@1145:       if (name == NULL) {
jrose@1145:         name = init_name;
jrose@1145:       } else if (name != init_name) {
jrose@1145:         return 0;               // no constructors of this method name
jrose@1145:       }
jrose@1145:     } else if (!(match_flags & IS_CONSTRUCTOR)) {
jrose@1145:       // methods only
jrose@1145:       if (name == NULL) {
jrose@1145:         name = init_name;
jrose@1145:         negate_name_test = true; // if we see the name, we *omit* the entry
jrose@1145:       } else if (name == init_name) {
jrose@1145:         return 0;               // no methods of this constructor name
jrose@1145:       }
jrose@1145:     } else {
jrose@1145:       // caller will accept either sort; no need to adjust name
jrose@1145:     }
sspitsyn@4965:     for (MethodStream st(k(), local_only, !search_intfc); !st.eos(); st.next()) {
coleenp@4037:       Method* m = st.method();
coleenp@2497:       Symbol* m_name = m->name();
jrose@1145:       if (m_name == clinit_name)
jrose@1145:         continue;
jrose@1145:       if (name != NULL && ((m_name != name) ^ negate_name_test))
jrose@1145:           continue;
jrose@1145:       if (sig != NULL && m->signature() != sig)
jrose@1145:         continue;
jrose@1145:       // passed the filters
jrose@1145:       if (rskip > 0) {
jrose@1145:         --rskip;
jrose@1145:       } else if (rfill < rlimit) {
sspitsyn@4965:         Handle result(thread, results->obj_at(rfill++));
sspitsyn@4965:         if (!java_lang_invoke_MemberName::is_instance(result()))
jrose@1145:           return -99;  // caller bug!
twisti@3969:         oop saved = MethodHandles::init_method_MemberName(result, m, true, NULL);
sspitsyn@4965:         if (saved != result())
twisti@3969:           results->obj_at_put(rfill-1, saved);  // show saved instance to user
jrose@1145:       } else if (++overflow >= overflow_limit) {
jrose@1145:         match_flags = 0; break; // got tired of looking at overflow
jrose@1145:       }
jrose@1145:     }
jrose@1145:   }
jrose@1145: 
jrose@1145:   // return number of elements we at leasted wanted to initialize
jrose@1145:   return rfill + overflow;
jrose@1145: }
sspitsyn@4965: 
sspitsyn@4965: //------------------------------------------------------------------------------
sspitsyn@4965: // MemberNameTable
sspitsyn@4965: //
sspitsyn@4965: 
sspitsyn@4965: MemberNameTable::MemberNameTable() : GrowableArray<jweak>(10, true) {
sspitsyn@4965:   assert_locked_or_safepoint(MemberNameTable_lock);
sspitsyn@4965: }
sspitsyn@4965: 
sspitsyn@4965: MemberNameTable::~MemberNameTable() {
sspitsyn@4965:   assert_locked_or_safepoint(MemberNameTable_lock);
sspitsyn@4965:   int len = this->length();
sspitsyn@4965: 
sspitsyn@4965:   for (int idx = 0; idx < len; idx++) {
sspitsyn@4965:     jweak ref = this->at(idx);
sspitsyn@4965:     JNIHandles::destroy_weak_global(ref);
sspitsyn@4965:   }
sspitsyn@4965: }
sspitsyn@4965: 
sspitsyn@4965: // Return entry index if found, return -1 otherwise.
sspitsyn@4965: int MemberNameTable::find_member_name(oop mem_name) {
sspitsyn@4965:   assert_locked_or_safepoint(MemberNameTable_lock);
sspitsyn@4965:   int len = this->length();
sspitsyn@4965: 
sspitsyn@4965:   for (int idx = 0; idx < len; idx++) {
sspitsyn@4965:     jweak ref = this->at(idx);
sspitsyn@4965:     oop entry = JNIHandles::resolve(ref);
sspitsyn@4965:     if (entry == mem_name) {
sspitsyn@4965:       return idx;
sspitsyn@4965:     }
sspitsyn@4965:   }
sspitsyn@4965:   return -1;
sspitsyn@4965: }
sspitsyn@4965: 
sspitsyn@4965: void MemberNameTable::add_member_name(jweak mem_name_wref) {
sspitsyn@4965:   assert_locked_or_safepoint(MemberNameTable_lock);
sspitsyn@4965:   oop mem_name = JNIHandles::resolve(mem_name_wref);
sspitsyn@4965: 
sspitsyn@4965:   // Each member name may appear just once: add only if not found
sspitsyn@4965:   if (find_member_name(mem_name) == -1) {
sspitsyn@4965:     this->append(mem_name_wref);
sspitsyn@4965:   }
sspitsyn@4965: }
sspitsyn@4965: 
sspitsyn@4965: #if INCLUDE_JVMTI
sspitsyn@4965: oop MemberNameTable::find_member_name_by_method(Method* old_method) {
sspitsyn@4965:   assert_locked_or_safepoint(MemberNameTable_lock);
sspitsyn@4965:   oop found = NULL;
sspitsyn@4965:   int len = this->length();
sspitsyn@4965: 
sspitsyn@4965:   for (int idx = 0; idx < len; idx++) {
sspitsyn@4965:     oop mem_name = JNIHandles::resolve(this->at(idx));
sspitsyn@4965:     if (mem_name == NULL) {
sspitsyn@4965:       continue;
sspitsyn@4965:     }
sspitsyn@4965:     Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mem_name);
sspitsyn@4965:     if (method == old_method) {
sspitsyn@4965:       found = mem_name;
sspitsyn@4965:       break;
sspitsyn@4965:     }
sspitsyn@4965:   }
sspitsyn@4965:   return found;
sspitsyn@4965: }
sspitsyn@4965: 
sspitsyn@4965: // It is called at safepoint only
sspitsyn@4965: void MemberNameTable::adjust_method_entries(Method** old_methods, Method** new_methods,
sspitsyn@4965:                                             int methods_length, bool *trace_name_printed) {
sspitsyn@4965:   assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
sspitsyn@4965:   // search the MemberNameTable for uses of either obsolete or EMCP methods
sspitsyn@4965:   for (int j = 0; j < methods_length; j++) {
sspitsyn@4965:     Method* old_method = old_methods[j];
sspitsyn@4965:     Method* new_method = new_methods[j];
sspitsyn@4965:     oop mem_name = find_member_name_by_method(old_method);
sspitsyn@4965:     if (mem_name != NULL) {
sspitsyn@4965:       java_lang_invoke_MemberName::adjust_vmtarget(mem_name, new_method);
sspitsyn@4965: 
sspitsyn@4965:       if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) {
sspitsyn@4965:         if (!(*trace_name_printed)) {
sspitsyn@4965:           // RC_TRACE_MESG macro has an embedded ResourceMark
sspitsyn@4965:           RC_TRACE_MESG(("adjust: name=%s",
sspitsyn@4965:                          old_method->method_holder()->external_name()));
sspitsyn@4965:           *trace_name_printed = true;
sspitsyn@4965:         }
sspitsyn@4965:         // RC_TRACE macro has an embedded ResourceMark
sspitsyn@4965:         RC_TRACE(0x00400000, ("MemberName method update: %s(%s)",
sspitsyn@4965:                               new_method->name()->as_C_string(),
sspitsyn@4965:                               new_method->signature()->as_C_string()));
sspitsyn@4965:       }
sspitsyn@4965:     }
sspitsyn@4965:   }
sspitsyn@4965: }
sspitsyn@4965: #endif // INCLUDE_JVMTI
sspitsyn@4965: 
jrose@1145: //
twisti@3969: // Here are the native methods in java.lang.invoke.MethodHandleNatives
jrose@1145: // They are the private interface between this JVM and the HotSpot-specific
jrose@1145: // Java code that implements JSR 292 method handles.
jrose@1145: //
jrose@1145: // Note:  We use a JVM_ENTRY macro to define each of these, for this is the way
jrose@1145: // that intrinsic (non-JNI) native methods are defined in HotSpot.
jrose@1145: //
coleenp@4037: 
jrose@2639: JVM_ENTRY(jint, MHN_getConstant(JNIEnv *env, jobject igcls, jint which)) {
jrose@1145:   switch (which) {
never@3105:   case MethodHandles::GC_COUNT_GWT:
never@3105: #ifdef COMPILER2
never@3105:     return true;
never@3105: #else
never@3105:     return false;
never@3105: #endif
jrose@1145:   }
jrose@1145:   return 0;
jrose@1145: }
jrose@1145: JVM_END
jrose@1145: 
jrose@1145: #ifndef PRODUCT
twisti@3969: #define EACH_NAMED_CON(template, requirement) \
twisti@3969:     template(MethodHandles,GC_COUNT_GWT) \
jrose@2639:     template(java_lang_invoke_MemberName,MN_IS_METHOD) \
jrose@2639:     template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \
jrose@2639:     template(java_lang_invoke_MemberName,MN_IS_FIELD) \
jrose@2639:     template(java_lang_invoke_MemberName,MN_IS_TYPE) \
twisti@4866:     template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \
jrose@2639:     template(java_lang_invoke_MemberName,MN_SEARCH_SUPERCLASSES) \
jrose@2639:     template(java_lang_invoke_MemberName,MN_SEARCH_INTERFACES) \
twisti@3969:     template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \
twisti@3969:     template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \
twisti@3969:     template(MethodHandles,GC_LAMBDA_SUPPORT) \
jrose@1145:     /*end*/
jrose@1145: 
twisti@3969: #define IGNORE_REQ(req_expr) /* req_expr */
jrose@1145: #define ONE_PLUS(scope,value) 1+
twisti@3969: static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0;
jrose@1145: #define VALUE_COMMA(scope,value) scope::value,
twisti@3969: static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 };
jrose@1145: #define STRING_NULL(scope,value) #value "\0"
twisti@3969: static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) };
twisti@3969: 
twisti@3969: static bool advertise_con_value(int which) {
twisti@3969:   if (which < 0)  return false;
twisti@3969:   bool ok = true;
twisti@3969:   int count = 0;
twisti@3969: #define INC_COUNT(scope,value) \
twisti@3969:   ++count;
twisti@3969: #define CHECK_REQ(req_expr) \
twisti@3969:   if (which < count)  return ok; \
twisti@3969:   ok = (req_expr);
twisti@3969:   EACH_NAMED_CON(INC_COUNT, CHECK_REQ);
twisti@3969: #undef INC_COUNT
twisti@3969: #undef CHECK_REQ
twisti@3969:   assert(count == con_value_count, "");
twisti@3969:   if (which < count)  return ok;
twisti@3969:   return false;
twisti@3969: }
jrose@1145: 
jrose@1145: #undef ONE_PLUS
jrose@1145: #undef VALUE_COMMA
jrose@1145: #undef STRING_NULL
jrose@1145: #undef EACH_NAMED_CON
twisti@3969: #endif // PRODUCT
jrose@1145: 
jrose@2639: JVM_ENTRY(jint, MHN_getNamedCon(JNIEnv *env, jobject igcls, jint which, jobjectArray box_jh)) {
jrose@1145: #ifndef PRODUCT
twisti@3969:   if (advertise_con_value(which)) {
twisti@3969:     assert(which >= 0 && which < con_value_count, "");
jrose@1145:     int con = con_values[which];
twisti@2806:     objArrayHandle box(THREAD, (objArrayOop) JNIHandles::resolve(box_jh));
twisti@2806:     if (box.not_null() && box->klass() == Universe::objectArrayKlassObj() && box->length() > 0) {
jrose@1145:       const char* str = &con_names[0];
jrose@1145:       for (int i = 0; i < which; i++)
jrose@1145:         str += strlen(str) + 1;   // skip name and null
twisti@2806:       oop name = java_lang_String::create_oop_from_str(str, CHECK_0);  // possible safepoint
jrose@1145:       box->obj_at_put(0, name);
jrose@1145:     }
jrose@1145:     return con;
jrose@1145:   }
jrose@1145: #endif
jrose@1145:   return 0;
jrose@1145: }
jrose@1145: JVM_END
jrose@1145: 
jrose@1145: // void init(MemberName self, AccessibleObject ref)
jrose@2639: JVM_ENTRY(void, MHN_init_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jobject target_jh)) {
never@2937:   if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); }
never@2937:   if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); }
jrose@1145:   Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh));
sspitsyn@4965:   Handle target(THREAD, JNIHandles::resolve_non_null(target_jh));
sspitsyn@4965:   MethodHandles::init_MemberName(mname, target);
jrose@1145: }
jrose@1145: JVM_END
jrose@1145: 
jrose@1145: // void expand(MemberName self)
jrose@2639: JVM_ENTRY(void, MHN_expand_Mem(JNIEnv *env, jobject igcls, jobject mname_jh)) {
never@2937:   if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); }
jrose@1145:   Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh));
jrose@1145:   MethodHandles::expand_MemberName(mname, 0, CHECK);
jrose@1145: }
jrose@1145: JVM_END
jrose@1145: 
jrose@1145: // void resolve(MemberName self, Class<?> caller)
twisti@3969: JVM_ENTRY(jobject, MHN_resolve_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jclass caller_jh)) {
twisti@3969:   if (mname_jh == NULL) { THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "mname is null"); }
jrose@1145:   Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh));
jrose@1862: 
jrose@1862:   // The trusted Java code that calls this method should already have performed
jrose@1862:   // access checks on behalf of the given caller.  But, we can verify this.
twisti@3969:   if (VerifyMethodHandles && caller_jh != NULL &&
twisti@3969:       java_lang_invoke_MemberName::clazz(mname()) != NULL) {
coleenp@4037:     Klass* reference_klass = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
jrose@1862:     if (reference_klass != NULL) {
jrose@1862:       // Emulate LinkResolver::check_klass_accessability.
coleenp@4037:       Klass* caller = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh));
jrose@1862:       if (!Reflection::verify_class_access(caller,
jrose@1862:                                            reference_klass,
jrose@1862:                                            true)) {
hseigel@4278:         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), reference_klass->external_name());
jrose@1862:       }
jrose@1862:     }
jrose@1862:   }
jrose@1862: 
twisti@3969:   Handle resolved = MethodHandles::resolve_MemberName(mname, CHECK_NULL);
twisti@3969:   if (resolved.is_null()) {
twisti@3969:     int flags = java_lang_invoke_MemberName::flags(mname());
twisti@3969:     int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK;
twisti@3969:     if (!MethodHandles::ref_kind_is_valid(ref_kind)) {
twisti@3969:       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format");
twisti@3969:     }
twisti@3969:     if ((flags & ALL_KINDS) == IS_FIELD) {
twisti@3969:       THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "field resolution failed");
twisti@3969:     } else if ((flags & ALL_KINDS) == IS_METHOD ||
twisti@3969:                (flags & ALL_KINDS) == IS_CONSTRUCTOR) {
twisti@3969:       THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "method resolution failed");
twisti@3969:     } else {
twisti@3969:       THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed");
twisti@3969:     }
twisti@3969:   }
twisti@3969: 
twisti@3969:   return JNIHandles::make_local(THREAD, resolved());
jrose@1145: }
jrose@1145: JVM_END
jrose@1145: 
twisti@3969: static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) {
twisti@3969:   if (mname == NULL ||
twisti@3969:       java_lang_invoke_MemberName::vmtarget(mname) == NULL) {
twisti@3969:     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved");
twisti@3969:   } else {
twisti@3969:     int flags = java_lang_invoke_MemberName::flags(mname);
twisti@3969:     if ((flags & IS_FIELD) != 0 &&
twisti@3969:         (must_be_static
twisti@3969:          ? (flags & JVM_ACC_STATIC) != 0
twisti@3969:          : (flags & JVM_ACC_STATIC) == 0)) {
twisti@3969:       int vmindex = java_lang_invoke_MemberName::vmindex(mname);
twisti@3969:       return (jlong) vmindex;
twisti@3969:     }
twisti@3969:   }
twisti@3969:   const char* msg = (must_be_static ? "static field required" : "non-static field required");
twisti@3969:   THROW_MSG_0(vmSymbols::java_lang_InternalError(), msg);
twisti@3969:   return 0;
twisti@3969: }
twisti@3969: 
twisti@3969: JVM_ENTRY(jlong, MHN_objectFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) {
twisti@3969:   return find_member_field_offset(JNIHandles::resolve(mname_jh), false, THREAD);
twisti@3969: }
twisti@3969: JVM_END
twisti@3969: 
twisti@3969: JVM_ENTRY(jlong, MHN_staticFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) {
twisti@3969:   return find_member_field_offset(JNIHandles::resolve(mname_jh), true, THREAD);
twisti@3969: }
twisti@3969: JVM_END
twisti@3969: 
twisti@3969: JVM_ENTRY(jobject, MHN_staticFieldBase(JNIEnv *env, jobject igcls, jobject mname_jh)) {
twisti@3969:   // use the other function to perform sanity checks:
twisti@3969:   jlong ignore = find_member_field_offset(JNIHandles::resolve(mname_jh), true, CHECK_NULL);
twisti@3969:   oop clazz = java_lang_invoke_MemberName::clazz(JNIHandles::resolve_non_null(mname_jh));
twisti@3969:   return JNIHandles::make_local(THREAD, clazz);
twisti@3969: }
twisti@3969: JVM_END
twisti@3969: 
twisti@3969: JVM_ENTRY(jobject, MHN_getMemberVMInfo(JNIEnv *env, jobject igcls, jobject mname_jh)) {
twisti@3969:   if (mname_jh == NULL)  return NULL;
twisti@3969:   Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh));
twisti@3969:   intptr_t vmindex  = java_lang_invoke_MemberName::vmindex(mname());
coleenp@4037:   Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(mname());
twisti@3969:   objArrayHandle result = oopFactory::new_objArray(SystemDictionary::Object_klass(), 2, CHECK_NULL);
twisti@3969:   jvalue vmindex_value; vmindex_value.j = (long)vmindex;
twisti@3969:   oop x = java_lang_boxing_object::create(T_LONG, &vmindex_value, CHECK_NULL);
twisti@3969:   result->obj_at_put(0, x);
twisti@3969:   x = NULL;
coleenp@4037:   if (vmtarget == NULL) {
coleenp@4037:     x = NULL;
twisti@3969:   } else if (vmtarget->is_klass()) {
hseigel@4278:     x = ((Klass*) vmtarget)->java_mirror();
coleenp@4037:   } else if (vmtarget->is_method()) {
twisti@3969:     Handle mname2 = MethodHandles::new_MemberName(CHECK_NULL);
sspitsyn@4965:     x = MethodHandles::init_method_MemberName(mname2, (Method*)vmtarget, false, NULL);
twisti@3969:   }
twisti@3969:   result->obj_at_put(1, x);
twisti@3969:   return JNIHandles::make_local(env, result());
twisti@3969: }
twisti@3969: JVM_END
twisti@3969: 
twisti@3969: 
twisti@3969: 
jrose@1145: //  static native int getMembers(Class<?> defc, String matchName, String matchSig,
jrose@1145: //          int matchFlags, Class<?> caller, int skip, MemberName[] results);
jrose@2639: JVM_ENTRY(jint, MHN_getMembers(JNIEnv *env, jobject igcls,
jrose@1145:                                jclass clazz_jh, jstring name_jh, jstring sig_jh,
jrose@1145:                                int mflags, jclass caller_jh, jint skip, jobjectArray results_jh)) {
jrose@1145:   if (clazz_jh == NULL || results_jh == NULL)  return -1;
coleenp@4037:   KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz_jh)));
jrose@1145: 
twisti@2806:   objArrayHandle results(THREAD, (objArrayOop) JNIHandles::resolve(results_jh));
twisti@2806:   if (results.is_null() || !results->is_objArray())  return -1;
jrose@1145: 
coleenp@2497:   TempNewSymbol name = NULL;
coleenp@2497:   TempNewSymbol sig = NULL;
jrose@1145:   if (name_jh != NULL) {
jrose@1145:     name = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(name_jh));
jrose@1145:     if (name == NULL)  return 0; // a match is not possible
jrose@1145:   }
jrose@1145:   if (sig_jh != NULL) {
jrose@1145:     sig = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(sig_jh));
jrose@1145:     if (sig == NULL)  return 0; // a match is not possible
jrose@1145:   }
jrose@1145: 
twisti@2806:   KlassHandle caller;
jrose@1145:   if (caller_jh != NULL) {
jrose@1145:     oop caller_oop = JNIHandles::resolve_non_null(caller_jh);
jrose@1145:     if (!java_lang_Class::is_instance(caller_oop))  return -1;
coleenp@4037:     caller = KlassHandle(THREAD, java_lang_Class::as_Klass(caller_oop));
jrose@1145:   }
jrose@1145: 
twisti@2806:   if (name != NULL && sig != NULL && results.not_null()) {
jrose@1145:     // try a direct resolve
jrose@1145:     // %%% TO DO
jrose@1145:   }
jrose@1145: 
sspitsyn@4965:   int res = MethodHandles::find_MemberNames(k, name, sig, mflags,
sspitsyn@4965:                                             caller, skip, results);
jrose@1145:   // TO DO: expand at least some of the MemberNames, to avoid massive callbacks
jrose@1145:   return res;
jrose@1145: }
jrose@1145: JVM_END
jrose@1145: 
twisti@3131: JVM_ENTRY(void, MHN_setCallSiteTargetNormal(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) {
twisti@3239:   Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh));
twisti@3239:   Handle target   (THREAD, JNIHandles::resolve(target_jh));
twisti@3131:   {
twisti@3131:     // Walk all nmethods depending on this call site.
twisti@3131:     MutexLocker mu(Compile_lock, thread);
twisti@3131:     Universe::flush_dependents_on(call_site, target);
twisti@4354:     java_lang_invoke_CallSite::set_target(call_site(), target());
twisti@3131:   }
twisti@3131: }
twisti@3131: JVM_END
twisti@3131: 
twisti@3131: JVM_ENTRY(void, MHN_setCallSiteTargetVolatile(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) {
twisti@3239:   Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh));
twisti@3239:   Handle target   (THREAD, JNIHandles::resolve(target_jh));
twisti@3131:   {
twisti@3131:     // Walk all nmethods depending on this call site.
twisti@3131:     MutexLocker mu(Compile_lock, thread);
twisti@3131:     Universe::flush_dependents_on(call_site, target);
twisti@4354:     java_lang_invoke_CallSite::set_target_volatile(call_site(), target());
twisti@3131:   }
twisti@3131: }
twisti@3131: JVM_END
twisti@3131: 
jrose@1145: /// JVM_RegisterMethodHandleMethods
jrose@1145: 
twisti@3131: #undef CS  // Solaris builds complain
twisti@3131: 
jrose@1145: #define LANG "Ljava/lang/"
jrose@2742: #define JLINV "Ljava/lang/invoke/"
jrose@1145: 
jrose@1145: #define OBJ   LANG"Object;"
jrose@1145: #define CLS   LANG"Class;"
jrose@1145: #define STRG  LANG"String;"
twisti@3131: #define CS    JLINV"CallSite;"
jrose@2742: #define MT    JLINV"MethodType;"
jrose@2742: #define MH    JLINV"MethodHandle;"
jrose@2742: #define MEM   JLINV"MemberName;"
jrose@1145: 
jrose@1145: #define CC (char*)  /*cast a literal from (const char*)*/
jrose@1145: #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
jrose@1145: 
twisti@3131: // These are the native methods on java.lang.invoke.MethodHandleNatives.
twisti@3969: static JNINativeMethod required_methods_JDK8[] = {
twisti@3131:   {CC"init",                      CC"("MEM""OBJ")V",                     FN_PTR(MHN_init_Mem)},
twisti@3131:   {CC"expand",                    CC"("MEM")V",                          FN_PTR(MHN_expand_Mem)},
twisti@3969:   {CC"resolve",                   CC"("MEM""CLS")"MEM,                   FN_PTR(MHN_resolve_Mem)},
twisti@3131:   {CC"getConstant",               CC"(I)I",                              FN_PTR(MHN_getConstant)},
jrose@1145:   //  static native int getNamedCon(int which, Object[] name)
twisti@3131:   {CC"getNamedCon",               CC"(I["OBJ")I",                        FN_PTR(MHN_getNamedCon)},
jrose@1145:   //  static native int getMembers(Class<?> defc, String matchName, String matchSig,
jrose@1145:   //          int matchFlags, Class<?> caller, int skip, MemberName[] results);
twisti@3969:   {CC"getMembers",                CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHN_getMembers)},
twisti@3969:   {CC"objectFieldOffset",         CC"("MEM")J",                          FN_PTR(MHN_objectFieldOffset)},
twisti@3131:   {CC"setCallSiteTargetNormal",   CC"("CS""MH")V",                       FN_PTR(MHN_setCallSiteTargetNormal)},
twisti@3969:   {CC"setCallSiteTargetVolatile", CC"("CS""MH")V",                       FN_PTR(MHN_setCallSiteTargetVolatile)},
twisti@3969:   {CC"staticFieldOffset",         CC"("MEM")J",                          FN_PTR(MHN_staticFieldOffset)},
twisti@3969:   {CC"staticFieldBase",           CC"("MEM")"OBJ,                        FN_PTR(MHN_staticFieldBase)},
twisti@3969:   {CC"getMemberVMInfo",           CC"("MEM")"OBJ,                        FN_PTR(MHN_getMemberVMInfo)}
jrose@1145: };
jrose@1145: 
jrose@1145: // This one function is exported, used by NativeLookup.
jrose@1145: 
jrose@1145: JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) {
twisti@2698:   if (!EnableInvokeDynamic) {
twisti@2698:     warning("JSR 292 is disabled in this JVM.  Use -XX:+UnlockDiagnosticVMOptions -XX:+EnableInvokeDynamic to enable.");
jrose@1145:     return;  // bind nothing
jrose@1145:   }
jrose@1145: 
twisti@3131:   assert(!MethodHandles::enabled(), "must not be enabled");
jrose@1474:   bool enable_MH = true;
jrose@1474: 
twisti@3969:   jclass MH_class = NULL;
twisti@3969:   if (SystemDictionary::MethodHandle_klass() == NULL) {
twisti@3969:     enable_MH = false;
twisti@3969:   } else {
hseigel@4278:     oop mirror = SystemDictionary::MethodHandle_klass()->java_mirror();
twisti@3969:     MH_class = (jclass) JNIHandles::make_local(env, mirror);
twisti@3969:   }
twisti@3969: 
twisti@3969:   int status;
twisti@3969: 
twisti@3969:   if (enable_MH) {
jrose@1145:     ThreadToNativeFromVM ttnfv(thread);
twisti@3969: 
twisti@3969:     status = env->RegisterNatives(MHN_class, required_methods_JDK8, sizeof(required_methods_JDK8)/sizeof(JNINativeMethod));
twisti@3969:     if (status != JNI_OK || env->ExceptionOccurred()) {
jrose@2742:       warning("JSR 292 method handle code is mismatched to this JVM.  Disabling support.");
jrose@2742:       enable_MH = false;
jrose@1145:       env->ExceptionClear();
jrose@1145:     }
jrose@1145:   }
jrose@1161: 
twisti@3969:   if (TraceInvokeDynamic) {
twisti@3969:     tty->print_cr("MethodHandle support loaded (using LambdaForms)");
jrose@1474:   }
jrose@1474: 
jrose@1474:   if (enable_MH) {
twisti@2436:     MethodHandles::generate_adapters();
jrose@1474:     MethodHandles::set_enabled(true);
jrose@1474:   }
jrose@1145: }
jrose@1145: JVM_END