1798 lines
79 KiB
C++
1798 lines
79 KiB
C++
/*
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* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "jvm.h"
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#include "classfile/defaultMethods.hpp"
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#include "classfile/javaClasses.hpp"
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#include "classfile/resolutionErrors.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "compiler/compileBroker.hpp"
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#include "gc/shared/collectedHeap.inline.hpp"
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#include "interpreter/bytecode.hpp"
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#include "interpreter/interpreterRuntime.hpp"
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#include "interpreter/linkResolver.hpp"
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#include "logging/log.hpp"
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#include "logging/logStream.hpp"
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#include "memory/resourceArea.hpp"
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#include "memory/universe.hpp"
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#include "oops/cpCache.inline.hpp"
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#include "oops/instanceKlass.hpp"
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#include "oops/method.hpp"
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#include "oops/objArrayKlass.hpp"
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#include "oops/objArrayOop.hpp"
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#include "oops/oop.inline.hpp"
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#include "prims/methodHandles.hpp"
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#include "prims/nativeLookup.hpp"
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#include "runtime/compilationPolicy.hpp"
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#include "runtime/fieldDescriptor.hpp"
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#include "runtime/frame.inline.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/reflection.hpp"
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#include "runtime/safepointVerifiers.hpp"
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#include "runtime/signature.hpp"
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#include "runtime/thread.inline.hpp"
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#include "runtime/vmThread.hpp"
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//------------------------------------------------------------------------------------------------------------------------
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// Implementation of CallInfo
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void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
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int vtable_index = Method::nonvirtual_vtable_index;
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set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
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}
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void CallInfo::set_interface(Klass* resolved_klass,
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Klass* selected_klass,
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const methodHandle& resolved_method,
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const methodHandle& selected_method,
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int itable_index, TRAPS) {
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// This is only called for interface methods. If the resolved_method
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// comes from java/lang/Object, it can be the subject of a virtual call, so
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// we should pick the vtable index from the resolved method.
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// In that case, the caller must call set_virtual instead of set_interface.
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assert(resolved_method->method_holder()->is_interface(), "");
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assert(itable_index == resolved_method()->itable_index(), "");
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set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
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}
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void CallInfo::set_virtual(Klass* resolved_klass,
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Klass* selected_klass,
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const methodHandle& resolved_method,
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const methodHandle& selected_method,
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int vtable_index, TRAPS) {
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assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
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assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
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CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
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set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
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assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
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}
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void CallInfo::set_handle(const methodHandle& resolved_method,
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Handle resolved_appendix,
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Handle resolved_method_type, TRAPS) {
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set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK);
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}
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void CallInfo::set_handle(Klass* resolved_klass,
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const methodHandle& resolved_method,
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Handle resolved_appendix,
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Handle resolved_method_type, TRAPS) {
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if (resolved_method.is_null()) {
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THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
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}
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assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
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resolved_method->is_compiled_lambda_form(),
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"linkMethod must return one of these");
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int vtable_index = Method::nonvirtual_vtable_index;
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assert(!resolved_method->has_vtable_index(), "");
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set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
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_resolved_appendix = resolved_appendix;
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_resolved_method_type = resolved_method_type;
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}
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void CallInfo::set_common(Klass* resolved_klass,
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Klass* selected_klass,
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const methodHandle& resolved_method,
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const methodHandle& selected_method,
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CallKind kind,
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int index,
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TRAPS) {
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assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
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_resolved_klass = resolved_klass;
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_selected_klass = selected_klass;
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_resolved_method = resolved_method;
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_selected_method = selected_method;
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_call_kind = kind;
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_call_index = index;
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_resolved_appendix = Handle();
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DEBUG_ONLY(verify()); // verify before making side effects
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CompilationPolicy::compile_if_required(selected_method, THREAD);
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}
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// utility query for unreflecting a method
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CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
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Klass* resolved_method_holder = resolved_method->method_holder();
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if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
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resolved_klass = resolved_method_holder;
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}
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_resolved_klass = resolved_klass;
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_selected_klass = resolved_klass;
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_resolved_method = resolved_method;
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_selected_method = resolved_method;
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// classify:
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CallKind kind = CallInfo::unknown_kind;
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int index = resolved_method->vtable_index();
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if (resolved_method->can_be_statically_bound()) {
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kind = CallInfo::direct_call;
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} else if (!resolved_method_holder->is_interface()) {
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// Could be an Object method inherited into an interface, but still a vtable call.
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kind = CallInfo::vtable_call;
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} else if (!resolved_klass->is_interface()) {
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// A default or miranda method. Compute the vtable index.
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index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
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resolved_method);
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assert(index >= 0 , "we should have valid vtable index at this point");
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kind = CallInfo::vtable_call;
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} else if (resolved_method->has_vtable_index()) {
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// Can occur if an interface redeclares a method of Object.
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#ifdef ASSERT
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// Ensure that this is really the case.
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Klass* object_klass = SystemDictionary::Object_klass();
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Method * object_resolved_method = object_klass->vtable().method_at(index);
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assert(object_resolved_method->name() == resolved_method->name(),
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"Object and interface method names should match at vtable index %d, %s != %s",
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index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
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assert(object_resolved_method->signature() == resolved_method->signature(),
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"Object and interface method signatures should match at vtable index %d, %s != %s",
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index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
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#endif // ASSERT
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kind = CallInfo::vtable_call;
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} else {
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// A regular interface call.
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kind = CallInfo::itable_call;
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index = resolved_method->itable_index();
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}
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assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
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_call_kind = kind;
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_call_index = index;
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_resolved_appendix = Handle();
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// Find or create a ResolvedMethod instance for this Method*
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set_resolved_method_name(CHECK);
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DEBUG_ONLY(verify());
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}
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void CallInfo::set_resolved_method_name(TRAPS) {
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Method* m = _resolved_method();
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assert(m != NULL, "Should already have a Method*");
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oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
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_resolved_method_name = Handle(THREAD, rmethod_name);
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}
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#ifdef ASSERT
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void CallInfo::verify() {
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switch (call_kind()) { // the meaning and allowed value of index depends on kind
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case CallInfo::direct_call:
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if (_call_index == Method::nonvirtual_vtable_index) break;
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// else fall through to check vtable index:
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case CallInfo::vtable_call:
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assert(resolved_klass()->verify_vtable_index(_call_index), "");
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break;
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case CallInfo::itable_call:
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assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
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break;
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case CallInfo::unknown_kind:
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assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
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break;
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default:
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fatal("Unexpected call kind %d", call_kind());
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}
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}
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#endif //ASSERT
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#ifndef PRODUCT
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void CallInfo::print() {
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ResourceMark rm;
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const char* kindstr;
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switch (_call_kind) {
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case direct_call: kindstr = "direct"; break;
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case vtable_call: kindstr = "vtable"; break;
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case itable_call: kindstr = "itable"; break;
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default : kindstr = "unknown"; break;
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}
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tty->print_cr("Call %s@%d %s", kindstr, _call_index,
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_resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
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}
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#endif
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//------------------------------------------------------------------------------------------------------------------------
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// Implementation of LinkInfo
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LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
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// resolve klass
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_resolved_klass = pool->klass_ref_at(index, CHECK);
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// Get name, signature, and static klass
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_name = pool->name_ref_at(index);
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_signature = pool->signature_ref_at(index);
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_tag = pool->tag_ref_at(index);
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_current_klass = pool->pool_holder();
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_current_method = current_method;
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// Coming from the constant pool always checks access
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_check_access = true;
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}
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LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
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// resolve klass
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_resolved_klass = pool->klass_ref_at(index, CHECK);
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// Get name, signature, and static klass
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_name = pool->name_ref_at(index);
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_signature = pool->signature_ref_at(index);
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_tag = pool->tag_ref_at(index);
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_current_klass = pool->pool_holder();
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_current_method = methodHandle();
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// Coming from the constant pool always checks access
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_check_access = true;
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}
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char* LinkInfo::method_string() const {
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return Method::name_and_sig_as_C_string(_resolved_klass, _name, _signature);
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}
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#ifndef PRODUCT
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void LinkInfo::print() {
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ResourceMark rm;
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tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
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_resolved_klass->name()->as_C_string(),
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_name->as_C_string(),
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_signature->as_C_string(),
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_current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
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_check_access ? "true" : "false");
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}
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#endif // PRODUCT
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//------------------------------------------------------------------------------------------------------------------------
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// Klass resolution
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void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass,
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bool fold_type_to_class, TRAPS) {
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Klass* base_klass = sel_klass;
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if (fold_type_to_class) {
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if (sel_klass->is_objArray_klass()) {
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base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
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}
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// The element type could be a typeArray - we only need the access
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// check if it is an reference to another class.
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if (!base_klass->is_instance_klass()) {
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return; // no relevant check to do
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}
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}
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Reflection::VerifyClassAccessResults vca_result =
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Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
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if (vca_result != Reflection::ACCESS_OK) {
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ResourceMark rm(THREAD);
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char* msg = Reflection::verify_class_access_msg(ref_klass,
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InstanceKlass::cast(base_klass),
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vca_result);
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if (msg == NULL) {
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Exceptions::fthrow(
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THREAD_AND_LOCATION,
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vmSymbols::java_lang_IllegalAccessError(),
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"failed to access class %s from class %s",
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base_klass->external_name(),
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ref_klass->external_name());
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} else {
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// Use module specific message returned by verify_class_access_msg().
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Exceptions::fthrow(
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THREAD_AND_LOCATION,
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vmSymbols::java_lang_IllegalAccessError(),
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"%s", msg);
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}
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}
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}
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//------------------------------------------------------------------------------------------------------------------------
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// Method resolution
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//
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// According to JVM spec. $5.4.3c & $5.4.3d
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// Look up method in klasses, including static methods
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// Then look up local default methods
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Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
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bool checkpolymorphism,
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bool in_imethod_resolve) {
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NoSafepointVerifier nsv; // Method* returned may not be reclaimed
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Klass* klass = link_info.resolved_klass();
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Symbol* name = link_info.name();
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Symbol* signature = link_info.signature();
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// Ignore overpasses so statics can be found during resolution
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Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
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if (klass->is_array_klass()) {
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// Only consider klass and super klass for arrays
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return result;
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}
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InstanceKlass* ik = InstanceKlass::cast(klass);
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// JDK 8, JVMS 5.4.3.4: Interface method resolution should
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// ignore static and non-public methods of java.lang.Object,
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// like clone, finalize, registerNatives.
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if (in_imethod_resolve &&
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result != NULL &&
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ik->is_interface() &&
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(result->is_static() || !result->is_public()) &&
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result->method_holder() == SystemDictionary::Object_klass()) {
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result = NULL;
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}
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// Before considering default methods, check for an overpass in the
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// current class if a method has not been found.
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if (result == NULL) {
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result = ik->find_method(name, signature);
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}
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if (result == NULL) {
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Array<Method*>* default_methods = ik->default_methods();
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if (default_methods != NULL) {
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result = InstanceKlass::find_method(default_methods, name, signature);
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}
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}
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if (checkpolymorphism && result != NULL) {
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vmIntrinsics::ID iid = result->intrinsic_id();
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if (MethodHandles::is_signature_polymorphic(iid)) {
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// Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
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return NULL;
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}
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}
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return result;
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}
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// returns first instance method
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// Looks up method in classes, then looks up local default methods
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methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
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Symbol* name,
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Symbol* signature, TRAPS) {
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Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
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while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
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Klass* super_klass = result->method_holder()->super();
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result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass);
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}
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if (klass->is_array_klass()) {
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// Only consider klass and super klass for arrays
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return methodHandle(THREAD, result);
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}
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if (result == NULL) {
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Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
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if (default_methods != NULL) {
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result = InstanceKlass::find_method(default_methods, name, signature);
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assert(result == NULL || !result->is_static(), "static defaults not allowed");
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}
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}
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return methodHandle(THREAD, result);
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}
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int LinkResolver::vtable_index_of_interface_method(Klass* klass,
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const methodHandle& resolved_method) {
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int vtable_index = Method::invalid_vtable_index;
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Symbol* name = resolved_method->name();
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Symbol* signature = resolved_method->signature();
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InstanceKlass* ik = InstanceKlass::cast(klass);
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// First check in default method array
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if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
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int index = InstanceKlass::find_method_index(ik->default_methods(),
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name, signature, Klass::find_overpass,
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Klass::find_static, Klass::find_private);
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if (index >= 0 ) {
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vtable_index = ik->default_vtable_indices()->at(index);
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}
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}
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if (vtable_index == Method::invalid_vtable_index) {
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// get vtable_index for miranda methods
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klassVtable vt = ik->vtable();
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vtable_index = vt.index_of_miranda(name, signature);
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}
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return vtable_index;
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}
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Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
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InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
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// Specify 'true' in order to skip default methods when searching the
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// interfaces. Function lookup_method_in_klasses() already looked for
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// the method in the default methods table.
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return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
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}
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methodHandle LinkResolver::lookup_polymorphic_method(
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const LinkInfo& link_info,
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Handle *appendix_result_or_null,
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Handle *method_type_result,
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TRAPS) {
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Klass* klass = link_info.resolved_klass();
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Symbol* name = link_info.name();
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Symbol* full_signature = link_info.signature();
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vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
|
|
if (TraceMethodHandles) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
|
|
vmIntrinsics::name_at(iid), klass->external_name(),
|
|
name->as_C_string(), full_signature->as_C_string());
|
|
}
|
|
if ((klass == SystemDictionary::MethodHandle_klass() ||
|
|
klass == SystemDictionary::VarHandle_klass()) &&
|
|
iid != vmIntrinsics::_none) {
|
|
if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
|
|
// Most of these do not need an up-call to Java to resolve, so can be done anywhere.
|
|
// Do not erase last argument type (MemberName) if it is a static linkTo method.
|
|
bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
|
|
TempNewSymbol basic_signature =
|
|
MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
|
|
if (TraceMethodHandles) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
|
|
name->as_C_string(),
|
|
full_signature->as_C_string(),
|
|
basic_signature->as_C_string());
|
|
}
|
|
methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
|
|
basic_signature,
|
|
CHECK_NULL);
|
|
if (result.not_null()) {
|
|
assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
|
|
assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
|
|
assert(basic_signature == result->signature(), "predict the result signature");
|
|
if (TraceMethodHandles) {
|
|
ttyLocker ttyl;
|
|
tty->print("lookup_polymorphic_method => intrinsic ");
|
|
result->print_on(tty);
|
|
}
|
|
}
|
|
return result;
|
|
} else if (iid == vmIntrinsics::_invokeGeneric
|
|
&& THREAD->can_call_java()
|
|
&& appendix_result_or_null != NULL) {
|
|
// This is a method with type-checking semantics.
|
|
// We will ask Java code to spin an adapter method for it.
|
|
if (!MethodHandles::enabled()) {
|
|
// Make sure the Java part of the runtime has been booted up.
|
|
Klass* natives = SystemDictionary::MethodHandleNatives_klass();
|
|
if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
|
|
SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
|
|
Handle(),
|
|
Handle(),
|
|
true,
|
|
CHECK_NULL);
|
|
}
|
|
}
|
|
|
|
Handle appendix;
|
|
Handle method_type;
|
|
methodHandle result = SystemDictionary::find_method_handle_invoker(
|
|
klass,
|
|
name,
|
|
full_signature,
|
|
link_info.current_klass(),
|
|
&appendix,
|
|
&method_type,
|
|
CHECK_NULL);
|
|
if (TraceMethodHandles) {
|
|
ttyLocker ttyl;
|
|
tty->print("lookup_polymorphic_method => (via Java) ");
|
|
result->print_on(tty);
|
|
tty->print(" lookup_polymorphic_method => appendix = ");
|
|
if (appendix.is_null()) tty->print_cr("(none)");
|
|
else appendix->print_on(tty);
|
|
}
|
|
if (result.not_null()) {
|
|
#ifdef ASSERT
|
|
ResourceMark rm(THREAD);
|
|
|
|
TempNewSymbol basic_signature =
|
|
MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
|
|
int actual_size_of_params = result->size_of_parameters();
|
|
int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
|
|
// +1 for MethodHandle.this, +1 for trailing MethodType
|
|
if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
|
|
if (appendix.not_null()) expected_size_of_params += 1;
|
|
if (actual_size_of_params != expected_size_of_params) {
|
|
tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
|
|
tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
|
|
result->print();
|
|
}
|
|
assert(actual_size_of_params == expected_size_of_params,
|
|
"%d != %d", actual_size_of_params, expected_size_of_params);
|
|
#endif //ASSERT
|
|
|
|
assert(appendix_result_or_null != NULL, "");
|
|
(*appendix_result_or_null) = appendix;
|
|
(*method_type_result) = method_type;
|
|
}
|
|
return result;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void LinkResolver::check_method_accessability(Klass* ref_klass,
|
|
Klass* resolved_klass,
|
|
Klass* sel_klass,
|
|
const methodHandle& sel_method,
|
|
TRAPS) {
|
|
|
|
AccessFlags flags = sel_method->access_flags();
|
|
|
|
// Special case: arrays always override "clone". JVMS 2.15.
|
|
// If the resolved klass is an array class, and the declaring class
|
|
// is java.lang.Object and the method is "clone", set the flags
|
|
// to public.
|
|
//
|
|
// We'll check for the method name first, as that's most likely
|
|
// to be false (so we'll short-circuit out of these tests).
|
|
if (sel_method->name() == vmSymbols::clone_name() &&
|
|
sel_klass == SystemDictionary::Object_klass() &&
|
|
resolved_klass->is_array_klass()) {
|
|
// We need to change "protected" to "public".
|
|
assert(flags.is_protected(), "clone not protected?");
|
|
jint new_flags = flags.as_int();
|
|
new_flags = new_flags & (~JVM_ACC_PROTECTED);
|
|
new_flags = new_flags | JVM_ACC_PUBLIC;
|
|
flags.set_flags(new_flags);
|
|
}
|
|
// assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
|
|
|
|
if (!Reflection::verify_field_access(ref_klass,
|
|
resolved_klass,
|
|
sel_klass,
|
|
flags,
|
|
true)) {
|
|
ResourceMark rm(THREAD);
|
|
Exceptions::fthrow(
|
|
THREAD_AND_LOCATION,
|
|
vmSymbols::java_lang_IllegalAccessError(),
|
|
"tried to access method %s.%s%s from class %s",
|
|
sel_klass->external_name(),
|
|
sel_method->name()->as_C_string(),
|
|
sel_method->signature()->as_C_string(),
|
|
ref_klass->external_name()
|
|
);
|
|
return;
|
|
}
|
|
}
|
|
|
|
methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
|
|
const constantPoolHandle& pool, int index, TRAPS) {
|
|
// This method is used only
|
|
// (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
|
|
// and
|
|
// (2) in Bytecode_invoke::static_target
|
|
// It appears to fail when applied to an invokeinterface call site.
|
|
// FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
|
|
// resolve klass
|
|
if (code == Bytecodes::_invokedynamic) {
|
|
Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
|
|
Symbol* method_name = vmSymbols::invoke_name();
|
|
Symbol* method_signature = pool->signature_ref_at(index);
|
|
Klass* current_klass = pool->pool_holder();
|
|
LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
|
|
return resolve_method(link_info, code, THREAD);
|
|
}
|
|
|
|
LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
|
|
Klass* resolved_klass = link_info.resolved_klass();
|
|
|
|
if (pool->has_preresolution()
|
|
|| (resolved_klass == SystemDictionary::MethodHandle_klass() &&
|
|
MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
|
|
Method* result = ConstantPool::method_at_if_loaded(pool, index);
|
|
if (result != NULL) {
|
|
return methodHandle(THREAD, result);
|
|
}
|
|
}
|
|
|
|
if (code == Bytecodes::_invokeinterface) {
|
|
return resolve_interface_method(link_info, code, THREAD);
|
|
} else if (code == Bytecodes::_invokevirtual) {
|
|
return resolve_method(link_info, code, THREAD);
|
|
} else if (!resolved_klass->is_interface()) {
|
|
return resolve_method(link_info, code, THREAD);
|
|
} else {
|
|
return resolve_interface_method(link_info, code, THREAD);
|
|
}
|
|
}
|
|
|
|
// Check and print a loader constraint violation message for method or interface method
|
|
void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
|
|
const methodHandle& resolved_method,
|
|
const char* method_type, TRAPS) {
|
|
Handle current_loader(THREAD, link_info.current_klass()->class_loader());
|
|
Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
|
|
|
|
ResourceMark rm(THREAD);
|
|
Symbol* failed_type_symbol =
|
|
SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
|
|
resolved_loader, true, CHECK);
|
|
if (failed_type_symbol != NULL) {
|
|
const char* msg = "loader constraint violation: when resolving %s"
|
|
" \"%s\" the class loader (instance of %s) of the current class, %s,"
|
|
" and the class loader (instance of %s) for the method's defining class, %s, have"
|
|
" different Class objects for the type %s used in the signature";
|
|
char* sig = link_info.method_string();
|
|
const char* loader1_name = SystemDictionary::loader_name(current_loader());
|
|
char* current = link_info.current_klass()->name()->as_C_string();
|
|
const char* loader2_name = SystemDictionary::loader_name(resolved_loader());
|
|
char* target = resolved_method->method_holder()->name()->as_C_string();
|
|
char* failed_type_name = failed_type_symbol->as_C_string();
|
|
size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
|
|
strlen(current) + strlen(loader2_name) + strlen(target) +
|
|
strlen(failed_type_name) + strlen(method_type) + 1;
|
|
char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
|
|
jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
|
|
target, failed_type_name);
|
|
THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
|
|
}
|
|
}
|
|
|
|
void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
|
|
Klass* current_klass,
|
|
Klass* sel_klass, TRAPS) {
|
|
Handle ref_loader(THREAD, current_klass->class_loader());
|
|
Handle sel_loader(THREAD, sel_klass->class_loader());
|
|
|
|
ResourceMark rm(THREAD); // needed for check_signature_loaders
|
|
Symbol* failed_type_symbol =
|
|
SystemDictionary::check_signature_loaders(sig,
|
|
ref_loader, sel_loader,
|
|
false,
|
|
CHECK);
|
|
if (failed_type_symbol != NULL) {
|
|
const char* msg = "loader constraint violation: when resolving field"
|
|
" \"%s\" the class loader (instance of %s) of the referring class, "
|
|
"%s, and the class loader (instance of %s) for the field's resolved "
|
|
"type, %s, have different Class objects for that type";
|
|
char* field_name = field->as_C_string();
|
|
const char* loader1_name = SystemDictionary::loader_name(ref_loader());
|
|
char* sel = sel_klass->name()->as_C_string();
|
|
const char* loader2_name = SystemDictionary::loader_name(sel_loader());
|
|
char* failed_type_name = failed_type_symbol->as_C_string();
|
|
size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
|
|
strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
|
|
char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
|
|
jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
|
|
failed_type_name);
|
|
THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
|
|
}
|
|
}
|
|
|
|
methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
|
|
Bytecodes::Code code, TRAPS) {
|
|
|
|
Handle nested_exception;
|
|
Klass* resolved_klass = link_info.resolved_klass();
|
|
|
|
// 1. For invokevirtual, cannot call an interface method
|
|
if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
|
|
resolved_klass->external_name());
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
// 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
|
|
if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
// 3. lookup method in resolved klass and its super klasses
|
|
methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
|
|
|
|
// 4. lookup method in all the interfaces implemented by the resolved klass
|
|
if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
|
|
resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
|
|
|
|
if (resolved_method.is_null()) {
|
|
// JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
|
|
resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
nested_exception = Handle(THREAD, PENDING_EXCEPTION);
|
|
CLEAR_PENDING_EXCEPTION;
|
|
}
|
|
}
|
|
}
|
|
|
|
// 5. method lookup failed
|
|
if (resolved_method.is_null()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
|
|
Method::name_and_sig_as_C_string(resolved_klass,
|
|
link_info.name(),
|
|
link_info.signature()),
|
|
nested_exception, NULL);
|
|
}
|
|
|
|
// 5. access checks, access checking may be turned off when calling from within the VM.
|
|
Klass* current_klass = link_info.current_klass();
|
|
if (link_info.check_access()) {
|
|
assert(current_klass != NULL , "current_klass should not be null");
|
|
|
|
// check if method can be accessed by the referring class
|
|
check_method_accessability(current_klass,
|
|
resolved_klass,
|
|
resolved_method->method_holder(),
|
|
resolved_method,
|
|
CHECK_NULL);
|
|
|
|
// check loader constraints
|
|
check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
|
|
}
|
|
|
|
return resolved_method;
|
|
}
|
|
|
|
static void trace_method_resolution(const char* prefix,
|
|
Klass* klass,
|
|
Klass* resolved_klass,
|
|
const methodHandle& method,
|
|
bool logitables,
|
|
int index = -1) {
|
|
#ifndef PRODUCT
|
|
ResourceMark rm;
|
|
Log(itables) logi;
|
|
LogStream lsi(logi.trace());
|
|
Log(vtables) logv;
|
|
LogStream lsv(logv.trace());
|
|
outputStream* st;
|
|
if (logitables) {
|
|
st = &lsi;
|
|
} else {
|
|
st = &lsv;
|
|
}
|
|
st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
|
|
prefix,
|
|
(klass == NULL ? "<NULL>" : klass->internal_name()),
|
|
(resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
|
|
Method::name_and_sig_as_C_string(resolved_klass,
|
|
method->name(),
|
|
method->signature()),
|
|
method->method_holder()->internal_name());
|
|
method->print_linkage_flags(st);
|
|
if (index != -1) {
|
|
st->print("vtable_index:%d", index);
|
|
}
|
|
st->cr();
|
|
#endif // PRODUCT
|
|
}
|
|
|
|
// Do linktime resolution of a method in the interface within the context of the specied bytecode.
|
|
methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
|
|
|
|
Klass* resolved_klass = link_info.resolved_klass();
|
|
|
|
// check if klass is interface
|
|
if (!resolved_klass->is_interface()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
// check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
|
|
if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
// lookup method in this interface or its super, java.lang.Object
|
|
// JDK8: also look for static methods
|
|
methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
|
|
|
|
if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
|
|
// lookup method in all the super-interfaces
|
|
resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
|
|
}
|
|
|
|
if (resolved_method.is_null()) {
|
|
// no method found
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
|
|
Method::name_and_sig_as_C_string(resolved_klass,
|
|
link_info.name(),
|
|
link_info.signature()));
|
|
}
|
|
|
|
if (link_info.check_access()) {
|
|
// JDK8 adds non-public interface methods, and accessability check requirement
|
|
Klass* current_klass = link_info.current_klass();
|
|
|
|
assert(current_klass != NULL , "current_klass should not be null");
|
|
|
|
// check if method can be accessed by the referring class
|
|
check_method_accessability(current_klass,
|
|
resolved_klass,
|
|
resolved_method->method_holder(),
|
|
resolved_method,
|
|
CHECK_NULL);
|
|
|
|
check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
|
|
}
|
|
|
|
if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
|
|
Method::name_and_sig_as_C_string(resolved_klass,
|
|
resolved_method->name(), resolved_method->signature()));
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
if (code == Bytecodes::_invokeinterface && resolved_method->is_private()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
|
|
Klass* current_klass = link_info.current_klass();
|
|
jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s, caller-class:%s",
|
|
Method::name_and_sig_as_C_string(resolved_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature()),
|
|
(current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
if (log_develop_is_enabled(Trace, itables)) {
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
|
|
Bytecodes::name(code));
|
|
trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
|
|
resolved_method, true);
|
|
}
|
|
|
|
return resolved_method;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
// Field resolution
|
|
|
|
void LinkResolver::check_field_accessability(Klass* ref_klass,
|
|
Klass* resolved_klass,
|
|
Klass* sel_klass,
|
|
const fieldDescriptor& fd,
|
|
TRAPS) {
|
|
if (!Reflection::verify_field_access(ref_klass,
|
|
resolved_klass,
|
|
sel_klass,
|
|
fd.access_flags(),
|
|
true)) {
|
|
ResourceMark rm(THREAD);
|
|
Exceptions::fthrow(
|
|
THREAD_AND_LOCATION,
|
|
vmSymbols::java_lang_IllegalAccessError(),
|
|
"tried to access field %s.%s from class %s",
|
|
sel_klass->external_name(),
|
|
fd.name()->as_C_string(),
|
|
ref_klass->external_name()
|
|
);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
|
|
LinkInfo link_info(pool, index, method, CHECK);
|
|
resolve_field(fd, link_info, byte, true, CHECK);
|
|
}
|
|
|
|
void LinkResolver::resolve_field(fieldDescriptor& fd,
|
|
const LinkInfo& link_info,
|
|
Bytecodes::Code byte, bool initialize_class,
|
|
TRAPS) {
|
|
assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
|
|
byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
|
|
byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
|
|
(byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
|
|
|
|
bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
|
|
bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
|
|
// Check if there's a resolved klass containing the field
|
|
Klass* resolved_klass = link_info.resolved_klass();
|
|
Symbol* field = link_info.name();
|
|
Symbol* sig = link_info.signature();
|
|
|
|
if (resolved_klass == NULL) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
|
|
}
|
|
|
|
// Resolve instance field
|
|
Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
|
|
// check if field exists; i.e., if a klass containing the field def has been selected
|
|
if (sel_klass == NULL) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
|
|
}
|
|
|
|
if (!link_info.check_access())
|
|
// Access checking may be turned off when calling from within the VM.
|
|
return;
|
|
|
|
// check access
|
|
Klass* current_klass = link_info.current_klass();
|
|
check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
|
|
|
|
// check for errors
|
|
if (is_static != fd.is_static()) {
|
|
ResourceMark rm(THREAD);
|
|
char msg[200];
|
|
jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
|
|
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
|
|
}
|
|
|
|
// A final field can be modified only
|
|
// (1) by methods declared in the class declaring the field and
|
|
// (2) by the <clinit> method (in case of a static field)
|
|
// or by the <init> method (in case of an instance field).
|
|
if (is_put && fd.access_flags().is_final()) {
|
|
ResourceMark rm(THREAD);
|
|
stringStream ss;
|
|
|
|
if (sel_klass != current_klass) {
|
|
ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
|
|
is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
|
|
current_klass->external_name());
|
|
THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
|
|
}
|
|
|
|
if (fd.constants()->pool_holder()->major_version() >= 53) {
|
|
methodHandle m = link_info.current_method();
|
|
assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
|
|
bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
|
|
fd.is_static() &&
|
|
!m()->is_static_initializer());
|
|
bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
|
|
!fd.is_static() &&
|
|
!m->is_object_initializer());
|
|
|
|
if (is_initialized_static_final_update || is_initialized_instance_final_update) {
|
|
ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
|
|
is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
|
|
m()->name()->as_C_string(),
|
|
is_static ? "<clinit>" : "<init>");
|
|
THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
|
|
}
|
|
}
|
|
}
|
|
|
|
// initialize resolved_klass if necessary
|
|
// note 1: the klass which declared the field must be initialized (i.e, sel_klass)
|
|
// according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
|
|
//
|
|
// note 2: we don't want to force initialization if we are just checking
|
|
// if the field access is legal; e.g., during compilation
|
|
if (is_static && initialize_class) {
|
|
sel_klass->initialize(CHECK);
|
|
}
|
|
|
|
if (sel_klass != current_klass) {
|
|
check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
|
|
}
|
|
|
|
// return information. note that the klass is set to the actual klass containing the
|
|
// field, otherwise access of static fields in superclasses will not work.
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
// Invoke resolution
|
|
//
|
|
// Naming conventions:
|
|
//
|
|
// resolved_method the specified method (i.e., static receiver specified via constant pool index)
|
|
// sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
|
|
// resolved_klass the specified klass (i.e., specified via constant pool index)
|
|
// recv_klass the receiver klass
|
|
|
|
|
|
void LinkResolver::resolve_static_call(CallInfo& result,
|
|
const LinkInfo& link_info,
|
|
bool initialize_class, TRAPS) {
|
|
methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
|
|
|
|
// The resolved class can change as a result of this resolution.
|
|
Klass* resolved_klass = resolved_method->method_holder();
|
|
|
|
// Initialize klass (this should only happen if everything is ok)
|
|
if (initialize_class && resolved_klass->should_be_initialized()) {
|
|
resolved_klass->initialize(CHECK);
|
|
// Use updated LinkInfo to reresolve with resolved method holder
|
|
LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
|
|
link_info.current_klass(),
|
|
link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
|
|
resolved_method = linktime_resolve_static_method(new_info, CHECK);
|
|
}
|
|
|
|
// setup result
|
|
result.set_static(resolved_klass, resolved_method, CHECK);
|
|
}
|
|
|
|
// throws linktime exceptions
|
|
methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
|
|
|
|
Klass* resolved_klass = link_info.resolved_klass();
|
|
methodHandle resolved_method;
|
|
if (!resolved_klass->is_interface()) {
|
|
resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
|
|
} else {
|
|
resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
|
|
}
|
|
assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
|
|
|
|
// check if static
|
|
if (!resolved_method->is_static()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature()));
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
return resolved_method;
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_special_call(CallInfo& result,
|
|
Handle recv,
|
|
const LinkInfo& link_info,
|
|
TRAPS) {
|
|
methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
|
|
runtime_resolve_special_method(result, link_info, resolved_method, recv, CHECK);
|
|
}
|
|
|
|
// throws linktime exceptions
|
|
methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
|
|
TRAPS) {
|
|
|
|
// Invokespecial is called for multiple special reasons:
|
|
// <init>
|
|
// local private method invocation, for classes and interfaces
|
|
// superclass.method, which can also resolve to a default method
|
|
// and the selected method is recalculated relative to the direct superclass
|
|
// superinterface.method, which explicitly does not check shadowing
|
|
Klass* resolved_klass = link_info.resolved_klass();
|
|
methodHandle resolved_method;
|
|
|
|
if (!resolved_klass->is_interface()) {
|
|
resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
|
|
} else {
|
|
resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
|
|
}
|
|
|
|
// check if method name is <init>, that it is found in same klass as static type
|
|
if (resolved_method->name() == vmSymbols::object_initializer_name() &&
|
|
resolved_method->method_holder() != resolved_klass) {
|
|
ResourceMark rm(THREAD);
|
|
Exceptions::fthrow(
|
|
THREAD_AND_LOCATION,
|
|
vmSymbols::java_lang_NoSuchMethodError(),
|
|
"%s: method %s%s not found",
|
|
resolved_klass->external_name(),
|
|
resolved_method->name()->as_C_string(),
|
|
resolved_method->signature()->as_C_string()
|
|
);
|
|
return NULL;
|
|
}
|
|
|
|
// check if invokespecial's interface method reference is in an indirect superinterface
|
|
Klass* current_klass = link_info.current_klass();
|
|
if (current_klass != NULL && resolved_klass->is_interface()) {
|
|
InstanceKlass* ck = InstanceKlass::cast(current_klass);
|
|
InstanceKlass *klass_to_check = !ck->is_anonymous() ?
|
|
ck :
|
|
InstanceKlass::cast(ck->host_klass());
|
|
// Disable verification for the dynamically-generated reflection bytecodes.
|
|
bool is_reflect = klass_to_check->is_subclass_of(
|
|
SystemDictionary::reflect_MagicAccessorImpl_klass());
|
|
|
|
if (!is_reflect &&
|
|
!klass_to_check->is_same_or_direct_interface(resolved_klass)) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf),
|
|
"Interface method reference: %s, is in an indirect superinterface of %s",
|
|
Method::name_and_sig_as_C_string(resolved_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature()),
|
|
current_klass->external_name());
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
}
|
|
|
|
// check if not static
|
|
if (resolved_method->is_static()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf),
|
|
"Expecting non-static method %s",
|
|
Method::name_and_sig_as_C_string(resolved_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature()));
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
if (log_develop_is_enabled(Trace, itables)) {
|
|
trace_method_resolution("invokespecial resolved method: caller-class:",
|
|
current_klass, resolved_klass, resolved_method, true);
|
|
}
|
|
|
|
return resolved_method;
|
|
}
|
|
|
|
// throws runtime exceptions
|
|
void LinkResolver::runtime_resolve_special_method(CallInfo& result,
|
|
const LinkInfo& link_info,
|
|
const methodHandle& resolved_method,
|
|
Handle recv, TRAPS) {
|
|
|
|
Klass* resolved_klass = link_info.resolved_klass();
|
|
|
|
// resolved method is selected method unless we have an old-style lookup
|
|
// for a superclass method
|
|
// Invokespecial for a superinterface, resolved method is selected method,
|
|
// no checks for shadowing
|
|
methodHandle sel_method(THREAD, resolved_method());
|
|
|
|
if (link_info.check_access() &&
|
|
// check if the method is not <init>
|
|
resolved_method->name() != vmSymbols::object_initializer_name()) {
|
|
|
|
// check if this is an old-style super call and do a new lookup if so
|
|
// a) check if ACC_SUPER flag is set for the current class
|
|
Klass* current_klass = link_info.current_klass();
|
|
if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
|
|
// b) check if the class of the resolved_klass is a superclass
|
|
// (not supertype in order to exclude interface classes) of the current class.
|
|
// This check is not performed for super.invoke for interface methods
|
|
// in super interfaces.
|
|
current_klass->is_subclass_of(resolved_klass) &&
|
|
current_klass != resolved_klass) {
|
|
// Lookup super method
|
|
Klass* super_klass = current_klass->super();
|
|
sel_method = lookup_instance_method_in_klasses(super_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature(), CHECK);
|
|
// check if found
|
|
if (sel_method.is_null()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
|
|
Method::name_and_sig_as_C_string(resolved_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature()));
|
|
// check loader constraints if found a different method
|
|
} else if (sel_method() != resolved_method()) {
|
|
check_method_loader_constraints(link_info, sel_method, "method", CHECK);
|
|
}
|
|
}
|
|
|
|
// Check that the class of objectref (the receiver) is the current class or interface,
|
|
// or a subtype of the current class or interface (the sender), otherwise invokespecial
|
|
// throws IllegalAccessError.
|
|
// The verifier checks that the sender is a subtype of the class in the I/MR operand.
|
|
// The verifier also checks that the receiver is a subtype of the sender, if the sender is
|
|
// a class. If the sender is an interface, the check has to be performed at runtime.
|
|
InstanceKlass* sender = InstanceKlass::cast(current_klass);
|
|
sender = sender->is_anonymous() ? sender->host_klass() : sender;
|
|
if (sender->is_interface() && recv.not_null()) {
|
|
Klass* receiver_klass = recv->klass();
|
|
if (!receiver_klass->is_subtype_of(sender)) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[500];
|
|
jio_snprintf(buf, sizeof(buf),
|
|
"Receiver class %s must be the current class or a subtype of interface %s",
|
|
receiver_klass->name()->as_C_string(),
|
|
sender->name()->as_C_string());
|
|
THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
|
|
}
|
|
}
|
|
}
|
|
|
|
// check if not static
|
|
if (sel_method->is_static()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature()));
|
|
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
// check if abstract
|
|
if (sel_method->is_abstract()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
|
|
Method::name_and_sig_as_C_string(resolved_klass,
|
|
sel_method->name(),
|
|
sel_method->signature()));
|
|
}
|
|
|
|
if (log_develop_is_enabled(Trace, itables)) {
|
|
trace_method_resolution("invokespecial selected method: resolved-class:",
|
|
resolved_klass, resolved_klass, sel_method, true);
|
|
}
|
|
|
|
// setup result
|
|
result.set_static(resolved_klass, sel_method, CHECK);
|
|
}
|
|
|
|
void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
|
|
const LinkInfo& link_info,
|
|
bool check_null_and_abstract, TRAPS) {
|
|
methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
|
|
runtime_resolve_virtual_method(result, resolved_method,
|
|
link_info.resolved_klass(),
|
|
recv, receiver_klass,
|
|
check_null_and_abstract, CHECK);
|
|
}
|
|
|
|
// throws linktime exceptions
|
|
methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
|
|
TRAPS) {
|
|
// normal method resolution
|
|
methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
|
|
|
|
assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
|
|
assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
|
|
|
|
// check if private interface method
|
|
Klass* resolved_klass = link_info.resolved_klass();
|
|
Klass* current_klass = link_info.current_klass();
|
|
|
|
// This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
|
|
if (resolved_klass->is_interface() && resolved_method->is_private()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
|
|
Method::name_and_sig_as_C_string(resolved_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature()),
|
|
(current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
// check if not static
|
|
if (resolved_method->is_static()) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature()));
|
|
THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
if (log_develop_is_enabled(Trace, vtables)) {
|
|
trace_method_resolution("invokevirtual resolved method: caller-class:",
|
|
current_klass, resolved_klass, resolved_method, false);
|
|
}
|
|
|
|
return resolved_method;
|
|
}
|
|
|
|
// throws runtime exceptions
|
|
void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
|
|
const methodHandle& resolved_method,
|
|
Klass* resolved_klass,
|
|
Handle recv,
|
|
Klass* recv_klass,
|
|
bool check_null_and_abstract,
|
|
TRAPS) {
|
|
|
|
// setup default return values
|
|
int vtable_index = Method::invalid_vtable_index;
|
|
methodHandle selected_method;
|
|
|
|
// runtime method resolution
|
|
if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
|
|
THROW(vmSymbols::java_lang_NullPointerException());
|
|
}
|
|
|
|
// Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
|
|
// has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
|
|
// a missing receiver might result in a bogus lookup.
|
|
assert(resolved_method->method_holder()->is_linked(), "must be linked");
|
|
|
|
// do lookup based on receiver klass using the vtable index
|
|
if (resolved_method->method_holder()->is_interface()) { // default or miranda method
|
|
vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
|
|
assert(vtable_index >= 0 , "we should have valid vtable index at this point");
|
|
|
|
selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
|
|
} else {
|
|
// at this point we are sure that resolved_method is virtual and not
|
|
// a default or miranda method; therefore, it must have a valid vtable index.
|
|
assert(!resolved_method->has_itable_index(), "");
|
|
vtable_index = resolved_method->vtable_index();
|
|
// We could get a negative vtable_index for final methods,
|
|
// because as an optimization they are never put in the vtable,
|
|
// unless they override an existing method.
|
|
// If we do get a negative, it means the resolved method is the the selected
|
|
// method, and it can never be changed by an override.
|
|
if (vtable_index == Method::nonvirtual_vtable_index) {
|
|
assert(resolved_method->can_be_statically_bound(), "cannot override this method");
|
|
selected_method = resolved_method;
|
|
} else {
|
|
selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
|
|
}
|
|
}
|
|
|
|
// check if method exists
|
|
if (selected_method.is_null()) {
|
|
throw_abstract_method_error(resolved_method, recv_klass, CHECK);
|
|
}
|
|
|
|
// check if abstract
|
|
if (check_null_and_abstract && selected_method->is_abstract()) {
|
|
// Pass arguments for generating a verbose error message.
|
|
throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
|
|
}
|
|
|
|
if (log_develop_is_enabled(Trace, vtables)) {
|
|
trace_method_resolution("invokevirtual selected method: receiver-class:",
|
|
recv_klass, resolved_klass, selected_method,
|
|
false, vtable_index);
|
|
}
|
|
// setup result
|
|
result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
|
|
}
|
|
|
|
void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
|
|
const LinkInfo& link_info,
|
|
bool check_null_and_abstract, TRAPS) {
|
|
// throws linktime exceptions
|
|
methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
|
|
runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
|
|
recv, recv_klass, check_null_and_abstract, CHECK);
|
|
}
|
|
|
|
methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
|
|
TRAPS) {
|
|
// normal interface method resolution
|
|
methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
|
|
assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
|
|
assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
|
|
|
|
return resolved_method;
|
|
}
|
|
|
|
// throws runtime exceptions
|
|
void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
|
|
const methodHandle& resolved_method,
|
|
Klass* resolved_klass,
|
|
Handle recv,
|
|
Klass* recv_klass,
|
|
bool check_null_and_abstract, TRAPS) {
|
|
// check if receiver exists
|
|
if (check_null_and_abstract && recv.is_null()) {
|
|
THROW(vmSymbols::java_lang_NullPointerException());
|
|
}
|
|
|
|
// check if receiver klass implements the resolved interface
|
|
if (!recv_klass->is_subtype_of(resolved_klass)) {
|
|
ResourceMark rm(THREAD);
|
|
char buf[200];
|
|
jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
|
|
recv_klass->external_name(),
|
|
resolved_klass->external_name());
|
|
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
// do lookup based on receiver klass
|
|
// This search must match the linktime preparation search for itable initialization
|
|
// to correctly enforce loader constraints for interface method inheritance
|
|
methodHandle selected_method = lookup_instance_method_in_klasses(recv_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature(), CHECK);
|
|
if (selected_method.is_null() && !check_null_and_abstract) {
|
|
// In theory this is a harmless placeholder value, but
|
|
// in practice leaving in null affects the nsk default method tests.
|
|
// This needs further study.
|
|
selected_method = resolved_method;
|
|
}
|
|
// check if method exists
|
|
if (selected_method.is_null()) {
|
|
// Pass arguments for generating a verbose error message.
|
|
throw_abstract_method_error(resolved_method, recv_klass, CHECK);
|
|
}
|
|
// check access
|
|
// Throw Illegal Access Error if selected_method is not public.
|
|
if (!selected_method->is_public()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
|
|
Method::name_and_sig_as_C_string(recv_klass,
|
|
selected_method->name(),
|
|
selected_method->signature()));
|
|
}
|
|
// check if abstract
|
|
if (check_null_and_abstract && selected_method->is_abstract()) {
|
|
throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
|
|
}
|
|
|
|
if (log_develop_is_enabled(Trace, itables)) {
|
|
trace_method_resolution("invokeinterface selected method: receiver-class:",
|
|
recv_klass, resolved_klass, selected_method, true);
|
|
}
|
|
// setup result
|
|
if (!resolved_method->has_itable_index()) {
|
|
int vtable_index = resolved_method->vtable_index();
|
|
assert(vtable_index == selected_method->vtable_index(), "sanity check");
|
|
result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
|
|
} else {
|
|
int itable_index = resolved_method()->itable_index();
|
|
result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK);
|
|
}
|
|
}
|
|
|
|
|
|
methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
|
|
const LinkInfo& link_info) {
|
|
EXCEPTION_MARK;
|
|
methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
} else {
|
|
return method_result;
|
|
}
|
|
}
|
|
|
|
methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
|
|
const LinkInfo& link_info) {
|
|
EXCEPTION_MARK;
|
|
methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
} else {
|
|
return method_result;
|
|
}
|
|
}
|
|
|
|
methodHandle LinkResolver::resolve_virtual_call_or_null(
|
|
Klass* receiver_klass,
|
|
const LinkInfo& link_info) {
|
|
EXCEPTION_MARK;
|
|
CallInfo info;
|
|
resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
}
|
|
return info.selected_method();
|
|
}
|
|
|
|
methodHandle LinkResolver::resolve_interface_call_or_null(
|
|
Klass* receiver_klass,
|
|
const LinkInfo& link_info) {
|
|
EXCEPTION_MARK;
|
|
CallInfo info;
|
|
resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
}
|
|
return info.selected_method();
|
|
}
|
|
|
|
int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
|
|
const LinkInfo& link_info) {
|
|
EXCEPTION_MARK;
|
|
CallInfo info;
|
|
resolve_virtual_call(info, Handle(), receiver_klass, link_info,
|
|
/*check_null_or_abstract*/false, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return Method::invalid_vtable_index;
|
|
}
|
|
return info.vtable_index();
|
|
}
|
|
|
|
methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
|
|
EXCEPTION_MARK;
|
|
CallInfo info;
|
|
resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
}
|
|
return info.selected_method();
|
|
}
|
|
|
|
methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
|
|
EXCEPTION_MARK;
|
|
CallInfo info;
|
|
resolve_special_call(info, Handle(), link_info, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
}
|
|
return info.selected_method();
|
|
}
|
|
|
|
|
|
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
// ConstantPool entries
|
|
|
|
void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
|
|
switch (byte) {
|
|
case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
|
|
case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
|
|
case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
|
|
case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
|
|
case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
|
|
case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
|
|
default : break;
|
|
}
|
|
return;
|
|
}
|
|
|
|
void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
|
|
const methodHandle& attached_method,
|
|
Bytecodes::Code byte, TRAPS) {
|
|
Klass* defc = attached_method->method_holder();
|
|
Symbol* name = attached_method->name();
|
|
Symbol* type = attached_method->signature();
|
|
LinkInfo link_info(defc, name, type);
|
|
switch(byte) {
|
|
case Bytecodes::_invokevirtual:
|
|
resolve_virtual_call(result, recv, recv->klass(), link_info,
|
|
/*check_null_and_abstract=*/true, CHECK);
|
|
break;
|
|
case Bytecodes::_invokeinterface:
|
|
resolve_interface_call(result, recv, recv->klass(), link_info,
|
|
/*check_null_and_abstract=*/true, CHECK);
|
|
break;
|
|
case Bytecodes::_invokestatic:
|
|
resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
|
|
break;
|
|
case Bytecodes::_invokespecial:
|
|
resolve_special_call(result, recv, link_info, CHECK);
|
|
break;
|
|
default:
|
|
fatal("bad call: %s", Bytecodes::name(byte));
|
|
break;
|
|
}
|
|
}
|
|
|
|
void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
|
|
LinkInfo link_info(pool, index, CHECK);
|
|
resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
|
|
const constantPoolHandle& pool, int index, TRAPS) {
|
|
LinkInfo link_info(pool, index, CHECK);
|
|
resolve_special_call(result, recv, link_info, CHECK);
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
|
|
const constantPoolHandle& pool, int index,
|
|
TRAPS) {
|
|
|
|
LinkInfo link_info(pool, index, CHECK);
|
|
Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
|
|
resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
|
|
LinkInfo link_info(pool, index, CHECK);
|
|
Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
|
|
resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
|
|
// This guy is reached from InterpreterRuntime::resolve_invokehandle.
|
|
LinkInfo link_info(pool, index, CHECK);
|
|
if (TraceMethodHandles) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
|
|
link_info.signature()->as_C_string());
|
|
}
|
|
resolve_handle_call(result, link_info, CHECK);
|
|
}
|
|
|
|
void LinkResolver::resolve_handle_call(CallInfo& result,
|
|
const LinkInfo& link_info,
|
|
TRAPS) {
|
|
// JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
|
|
Klass* resolved_klass = link_info.resolved_klass();
|
|
assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
|
|
resolved_klass == SystemDictionary::VarHandle_klass(), "");
|
|
assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
|
|
Handle resolved_appendix;
|
|
Handle resolved_method_type;
|
|
methodHandle resolved_method = lookup_polymorphic_method(link_info,
|
|
&resolved_appendix, &resolved_method_type, CHECK);
|
|
result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
|
|
}
|
|
|
|
void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
|
|
Symbol* method_name = pool->name_ref_at(index);
|
|
Symbol* method_signature = pool->signature_ref_at(index);
|
|
Klass* current_klass = pool->pool_holder();
|
|
|
|
// Resolve the bootstrap specifier (BSM + optional arguments).
|
|
Handle bootstrap_specifier;
|
|
// Check if CallSite has been bound already:
|
|
ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
|
|
int pool_index = cpce->constant_pool_index();
|
|
|
|
if (cpce->is_f1_null()) {
|
|
if (cpce->indy_resolution_failed()) {
|
|
ConstantPool::throw_resolution_error(pool,
|
|
ResolutionErrorTable::encode_cpcache_index(index),
|
|
CHECK);
|
|
}
|
|
|
|
// The initial step in Call Site Specifier Resolution is to resolve the symbolic
|
|
// reference to a method handle which will be the bootstrap method for a dynamic
|
|
// call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
|
|
// method fails, then a MethodHandleInError is stored at the corresponding bootstrap
|
|
// method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
|
|
// set the indy_rf flag since any subsequent invokedynamic instruction which shares
|
|
// this bootstrap method will encounter the resolution of MethodHandleInError.
|
|
oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
|
|
Exceptions::wrap_dynamic_exception(CHECK);
|
|
assert(bsm_info != NULL, "");
|
|
// FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
|
|
bootstrap_specifier = Handle(THREAD, bsm_info);
|
|
}
|
|
if (!cpce->is_f1_null()) {
|
|
methodHandle method( THREAD, cpce->f1_as_method());
|
|
Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
|
|
Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
|
|
result.set_handle(method, appendix, method_type, THREAD);
|
|
Exceptions::wrap_dynamic_exception(CHECK);
|
|
return;
|
|
}
|
|
|
|
if (TraceMethodHandles) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
|
|
ConstantPool::decode_invokedynamic_index(index),
|
|
method_name->as_C_string(), method_signature->as_C_string(),
|
|
current_klass->name()->as_C_string());
|
|
tty->print(" BSM info: "); bootstrap_specifier->print();
|
|
}
|
|
|
|
resolve_dynamic_call(result, pool_index, bootstrap_specifier, method_name,
|
|
method_signature, current_klass, THREAD);
|
|
if (HAS_PENDING_EXCEPTION && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
|
|
int encoded_index = ResolutionErrorTable::encode_cpcache_index(index);
|
|
bool recorded_res_status = cpce->save_and_throw_indy_exc(pool, pool_index,
|
|
encoded_index,
|
|
pool()->tag_at(pool_index),
|
|
CHECK);
|
|
if (!recorded_res_status) {
|
|
// Another thread got here just before we did. So, either use the method
|
|
// that it resolved or throw the LinkageError exception that it threw.
|
|
if (!cpce->is_f1_null()) {
|
|
methodHandle method( THREAD, cpce->f1_as_method());
|
|
Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
|
|
Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
|
|
result.set_handle(method, appendix, method_type, THREAD);
|
|
Exceptions::wrap_dynamic_exception(CHECK);
|
|
} else {
|
|
assert(cpce->indy_resolution_failed(), "Resolution failure flag not set");
|
|
ConstantPool::throw_resolution_error(pool, encoded_index, CHECK);
|
|
}
|
|
return;
|
|
}
|
|
assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set");
|
|
}
|
|
}
|
|
|
|
void LinkResolver::resolve_dynamic_call(CallInfo& result,
|
|
int pool_index,
|
|
Handle bootstrap_specifier,
|
|
Symbol* method_name, Symbol* method_signature,
|
|
Klass* current_klass,
|
|
TRAPS) {
|
|
// JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
|
|
// The appendix argument is likely to be a freshly-created CallSite.
|
|
Handle resolved_appendix;
|
|
Handle resolved_method_type;
|
|
methodHandle resolved_method =
|
|
SystemDictionary::find_dynamic_call_site_invoker(current_klass,
|
|
pool_index,
|
|
bootstrap_specifier,
|
|
method_name, method_signature,
|
|
&resolved_appendix,
|
|
&resolved_method_type,
|
|
THREAD);
|
|
Exceptions::wrap_dynamic_exception(CHECK);
|
|
result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
|
|
Exceptions::wrap_dynamic_exception(CHECK);
|
|
}
|
|
|
|
// Selected method is abstract.
|
|
void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
|
|
const methodHandle& selected_method,
|
|
Klass *recv_klass, TRAPS) {
|
|
Klass *resolved_klass = resolved_method->method_holder();
|
|
ResourceMark rm(THREAD);
|
|
stringStream ss;
|
|
|
|
if (recv_klass != NULL) {
|
|
ss.print("Receiver class %s does not define or inherit an "
|
|
"implementation of the",
|
|
recv_klass->external_name());
|
|
} else {
|
|
ss.print("Missing implementation of");
|
|
}
|
|
|
|
assert(resolved_method.not_null(), "Sanity");
|
|
ss.print(" resolved method %s%s%s%s of %s %s.",
|
|
resolved_method->is_abstract() ? "abstract " : "",
|
|
resolved_method->is_private() ? "private " : "",
|
|
resolved_method->name()->as_C_string(),
|
|
resolved_method->signature()->as_C_string(),
|
|
resolved_klass->external_kind(),
|
|
resolved_klass->external_name());
|
|
|
|
if (selected_method.not_null() && !(resolved_method == selected_method)) {
|
|
ss.print(" Selected method is %s%s%s.",
|
|
selected_method->is_abstract() ? "abstract " : "",
|
|
selected_method->is_private() ? "private " : "",
|
|
selected_method->name_and_sig_as_C_string());
|
|
}
|
|
|
|
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
|
|
}
|