| /* |
| * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. |
| * Copyright 2009, 2010, 2011 Red Hat, Inc. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "interpreter/cppInterpreterGenerator.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "prims/methodHandles.hpp" |
| |
| void MethodHandles::invoke_target(Method* method, TRAPS) { |
| |
| JavaThread *thread = (JavaThread *) THREAD; |
| ZeroStack *stack = thread->zero_stack(); |
| InterpreterFrame *frame = thread->top_zero_frame()->as_interpreter_frame(); |
| interpreterState istate = frame->interpreter_state(); |
| |
| // Trim back the stack to put the parameters at the top |
| stack->set_sp(istate->stack() + 1); |
| |
| Interpreter::invoke_method(method, method->from_interpreted_entry(), THREAD); |
| |
| // Convert the result |
| istate->set_stack(stack->sp() - 1); |
| |
| } |
| |
| oop MethodHandles::popFromStack(TRAPS) { |
| |
| JavaThread *thread = (JavaThread *) THREAD; |
| InterpreterFrame *frame = thread->top_zero_frame()->as_interpreter_frame(); |
| interpreterState istate = frame->interpreter_state(); |
| intptr_t* topOfStack = istate->stack(); |
| |
| oop top = STACK_OBJECT(-1); |
| MORE_STACK(-1); |
| istate->set_stack(topOfStack); |
| |
| return top; |
| |
| } |
| |
| int MethodHandles::method_handle_entry_invokeBasic(Method* method, intptr_t UNUSED, TRAPS) { |
| |
| JavaThread *thread = (JavaThread *) THREAD; |
| InterpreterFrame *frame = thread->top_zero_frame()->as_interpreter_frame(); |
| interpreterState istate = frame->interpreter_state(); |
| intptr_t* topOfStack = istate->stack(); |
| |
| // 'this' is a MethodHandle. We resolve the target method by accessing this.form.vmentry.vmtarget. |
| int numArgs = method->size_of_parameters(); |
| oop lform1 = java_lang_invoke_MethodHandle::form(STACK_OBJECT(-numArgs)); // this.form |
| oop vmEntry1 = java_lang_invoke_LambdaForm::vmentry(lform1); |
| Method* vmtarget = (Method*) java_lang_invoke_MemberName::vmtarget(vmEntry1); |
| |
| invoke_target(vmtarget, THREAD); |
| |
| // No deoptimized frames on the stack |
| return 0; |
| } |
| |
| int MethodHandles::method_handle_entry_linkToStaticOrSpecial(Method* method, intptr_t UNUSED, TRAPS) { |
| |
| // Pop appendix argument from stack. This is a MemberName which we resolve to the |
| // target method. |
| oop vmentry = popFromStack(THREAD); |
| |
| Method* vmtarget = (Method*) java_lang_invoke_MemberName::vmtarget(vmentry); |
| |
| invoke_target(vmtarget, THREAD); |
| |
| return 0; |
| } |
| |
| int MethodHandles::method_handle_entry_linkToInterface(Method* method, intptr_t UNUSED, TRAPS) { |
| JavaThread *thread = (JavaThread *) THREAD; |
| InterpreterFrame *frame = thread->top_zero_frame()->as_interpreter_frame(); |
| interpreterState istate = frame->interpreter_state(); |
| |
| // Pop appendix argument from stack. This is a MemberName which we resolve to the |
| // target method. |
| oop vmentry = popFromStack(THREAD); |
| intptr_t* topOfStack = istate->stack(); |
| |
| // Resolve target method by looking up in the receiver object's itable. |
| Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(vmentry)); |
| intptr_t vmindex = java_lang_invoke_MemberName::vmindex(vmentry); |
| Method* target = (Method*) java_lang_invoke_MemberName::vmtarget(vmentry); |
| |
| int numArgs = target->size_of_parameters(); |
| oop recv = STACK_OBJECT(-numArgs); |
| |
| InstanceKlass* klass_part = InstanceKlass::cast(recv->klass()); |
| itableOffsetEntry* ki = (itableOffsetEntry*) klass_part->start_of_itable(); |
| int i; |
| for ( i = 0 ; i < klass_part->itable_length() ; i++, ki++ ) { |
| if (ki->interface_klass() == clazz) break; |
| } |
| |
| itableMethodEntry* im = ki->first_method_entry(recv->klass()); |
| Method* vmtarget = im[vmindex].method(); |
| |
| invoke_target(vmtarget, THREAD); |
| |
| return 0; |
| } |
| |
| int MethodHandles::method_handle_entry_linkToVirtual(Method* method, intptr_t UNUSED, TRAPS) { |
| JavaThread *thread = (JavaThread *) THREAD; |
| |
| InterpreterFrame *frame = thread->top_zero_frame()->as_interpreter_frame(); |
| interpreterState istate = frame->interpreter_state(); |
| |
| // Pop appendix argument from stack. This is a MemberName which we resolve to the |
| // target method. |
| oop vmentry = popFromStack(THREAD); |
| intptr_t* topOfStack = istate->stack(); |
| |
| // Resolve target method by looking up in the receiver object's vtable. |
| intptr_t vmindex = java_lang_invoke_MemberName::vmindex(vmentry); |
| Method* target = (Method*) java_lang_invoke_MemberName::vmtarget(vmentry); |
| int numArgs = target->size_of_parameters(); |
| oop recv = STACK_OBJECT(-numArgs); |
| Klass* clazz = recv->klass(); |
| Klass* klass_part = InstanceKlass::cast(clazz); |
| ResourceMark rm(THREAD); |
| klassVtable vtable = klass_part->vtable(); |
| Method* vmtarget = vtable.method_at(vmindex); |
| |
| invoke_target(vmtarget, THREAD); |
| |
| return 0; |
| } |
| |
| int MethodHandles::method_handle_entry_invalid(Method* method, intptr_t UNUSED, TRAPS) { |
| ShouldNotReachHere(); |
| return 0; |
| } |
| |
| address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* masm, |
| vmIntrinsics::ID iid) { |
| switch (iid) { |
| case vmIntrinsics::_invokeGeneric: |
| case vmIntrinsics::_compiledLambdaForm: |
| // Perhaps surprisingly, the symbolic references visible to Java are not directly used. |
| // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. |
| // They all allow an appendix argument. |
| return CppInterpreterGenerator::generate_entry_impl(masm, (address) MethodHandles::method_handle_entry_invalid); |
| case vmIntrinsics::_invokeBasic: |
| return CppInterpreterGenerator::generate_entry_impl(masm, (address) MethodHandles::method_handle_entry_invokeBasic); |
| case vmIntrinsics::_linkToStatic: |
| case vmIntrinsics::_linkToSpecial: |
| return CppInterpreterGenerator::generate_entry_impl(masm, (address) MethodHandles::method_handle_entry_linkToStaticOrSpecial); |
| case vmIntrinsics::_linkToInterface: |
| return CppInterpreterGenerator::generate_entry_impl(masm, (address) MethodHandles::method_handle_entry_linkToInterface); |
| case vmIntrinsics::_linkToVirtual: |
| return CppInterpreterGenerator::generate_entry_impl(masm, (address) MethodHandles::method_handle_entry_linkToVirtual); |
| default: |
| ShouldNotReachHere(); |
| return NULL; |
| } |
| } |