1680 lines
78 KiB
C++
1680 lines
78 KiB
C++
/*
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* Copyright (c) 1997, 2015, 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 "classfile/defaultMethods.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 "memory/resourceArea.hpp"
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#include "memory/universe.inline.hpp"
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#include "oops/instanceKlass.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/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(KlassHandle resolved_klass, 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(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, 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(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, 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(methodHandle resolved_method, Handle resolved_appendix, 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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KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
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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(KlassHandle resolved_klass,
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KlassHandle selected_klass,
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methodHandle resolved_method,
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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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if (CompilationPolicy::must_be_compiled(selected_method)) {
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// This path is unusual, mostly used by the '-Xcomp' stress test mode.
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// Note: with several active threads, the must_be_compiled may be true
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// while can_be_compiled is false; remove assert
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// assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
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if (THREAD->is_Compiler_thread()) {
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// don't force compilation, resolve was on behalf of compiler
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return;
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}
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if (selected_method->method_holder()->is_not_initialized()) {
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// 'is_not_initialized' means not only '!is_initialized', but also that
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// initialization has not been started yet ('!being_initialized')
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// Do not force compilation of methods in uninitialized classes.
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// Note that doing this would throw an assert later,
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// in CompileBroker::compile_method.
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// We sometimes use the link resolver to do reflective lookups
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// even before classes are initialized.
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return;
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}
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CompileBroker::compile_method(selected_method, InvocationEntryBci,
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CompilationPolicy::policy()->initial_compile_level(),
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methodHandle(), 0, "must_be_compiled", CHECK);
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}
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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) {
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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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ResourceMark rm;
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klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
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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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KlassHandle 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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err_msg("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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err_msg("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, err_msg("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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DEBUG_ONLY(verify());
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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(err_msg_res("Unexpected call kind %d", call_kind()));
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}
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}
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#endif //ASSERT
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//------------------------------------------------------------------------------------------------------------------------
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// Klass resolution
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void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
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if (!Reflection::verify_class_access(ref_klass(),
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sel_klass(),
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true)) {
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ResourceMark rm(THREAD);
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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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"tried to access class %s from class %s",
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sel_klass->external_name(),
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ref_klass->external_name()
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);
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return;
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}
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}
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void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
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Klass* result_oop = pool->klass_ref_at(index, CHECK);
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result = KlassHandle(THREAD, result_oop);
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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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void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, bool checkpolymorphism, bool in_imethod_resolve, TRAPS) {
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// Ignore overpasses so statics can be found during resolution
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Method* result_oop = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
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if (klass->oop_is_array()) {
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// Only consider klass and super klass for arrays
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result = methodHandle(THREAD, result_oop);
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return;
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}
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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_oop != NULL &&
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klass->is_interface() &&
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(result_oop->is_static() || !result_oop->is_public()) &&
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result_oop->method_holder() == SystemDictionary::Object_klass()) {
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result_oop = 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_oop == NULL) {
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result_oop = InstanceKlass::cast(klass())->find_method(name, signature);
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}
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if (result_oop == 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_oop = InstanceKlass::find_method(default_methods, name, signature);
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}
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}
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if (checkpolymorphism && result_oop != NULL) {
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vmIntrinsics::ID iid = result_oop->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;
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}
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}
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result = methodHandle(THREAD, result_oop);
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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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void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
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Method* result_oop = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
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result = methodHandle(THREAD, result_oop);
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while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) {
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KlassHandle super_klass = KlassHandle(THREAD, result->method_holder()->super());
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result = methodHandle(THREAD, super_klass->uncached_lookup_method(name, signature, Klass::find_overpass));
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}
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if (klass->oop_is_array()) {
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// Only consider klass and super klass for arrays
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return;
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}
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if (result.is_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 = methodHandle(InstanceKlass::find_method(default_methods, name, signature));
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assert(result.is_null() || !result->is_static(), "static defaults not allowed");
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}
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}
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}
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int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
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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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// First check in default method array
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if (!resolved_method->is_abstract() &&
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(InstanceKlass::cast(klass())->default_methods() != NULL)) {
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int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(),
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name, signature, Klass::find_overpass, Klass::find_static);
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if (index >= 0 ) {
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vtable_index = InstanceKlass::cast(klass())->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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ResourceMark rm;
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klassVtable *vt = InstanceKlass::cast(klass())->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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void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
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InstanceKlass *ik = InstanceKlass::cast(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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result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature, Klass::skip_defaults));
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}
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void LinkResolver::lookup_polymorphic_method(methodHandle& result,
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KlassHandle klass, Symbol* name, Symbol* full_signature,
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KlassHandle current_klass,
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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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vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
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if (TraceMethodHandles) {
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ResourceMark rm(THREAD);
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tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
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vmIntrinsics::name_at(iid), klass->external_name(),
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name->as_C_string(), full_signature->as_C_string());
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}
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if (klass() == SystemDictionary::MethodHandle_klass() &&
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iid != vmIntrinsics::_none) {
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if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
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// Most of these do not need an up-call to Java to resolve, so can be done anywhere.
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// Do not erase last argument type (MemberName) if it is a static linkTo method.
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bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
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TempNewSymbol basic_signature =
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MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
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if (TraceMethodHandles) {
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ResourceMark rm(THREAD);
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tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
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name->as_C_string(),
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full_signature->as_C_string(),
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basic_signature->as_C_string());
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}
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result = SystemDictionary::find_method_handle_intrinsic(iid,
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basic_signature,
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CHECK);
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if (result.not_null()) {
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assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
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assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
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assert(basic_signature == result->signature(), "predict the result signature");
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if (TraceMethodHandles) {
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tty->print("lookup_polymorphic_method => intrinsic ");
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result->print_on(tty);
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}
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return;
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}
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} else if (iid == vmIntrinsics::_invokeGeneric
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&& !THREAD->is_Compiler_thread()
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&& appendix_result_or_null != NULL) {
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// This is a method with type-checking semantics.
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// We will ask Java code to spin an adapter method for it.
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if (!MethodHandles::enabled()) {
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// Make sure the Java part of the runtime has been booted up.
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Klass* natives = SystemDictionary::MethodHandleNatives_klass();
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if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
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SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
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Handle(),
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Handle(),
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true,
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CHECK);
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}
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}
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Handle appendix;
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Handle method_type;
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result = SystemDictionary::find_method_handle_invoker(name,
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full_signature,
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current_klass,
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&appendix,
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&method_type,
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CHECK);
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if (TraceMethodHandles) {
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tty->print("lookup_polymorphic_method => (via Java) ");
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result->print_on(tty);
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tty->print(" lookup_polymorphic_method => appendix = ");
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if (appendix.is_null()) tty->print_cr("(none)");
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else appendix->print_on(tty);
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}
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if (result.not_null()) {
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#ifdef ASSERT
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ResourceMark rm(THREAD);
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TempNewSymbol basic_signature =
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MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
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int actual_size_of_params = result->size_of_parameters();
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int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
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// +1 for MethodHandle.this, +1 for trailing MethodType
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if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
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if (appendix.not_null()) expected_size_of_params += 1;
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if (actual_size_of_params != expected_size_of_params) {
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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,
|
|
err_msg("%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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void LinkResolver::check_method_accessability(KlassHandle ref_klass,
|
|
KlassHandle resolved_klass,
|
|
KlassHandle sel_klass,
|
|
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->oop_is_array()) {
|
|
// 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;
|
|
}
|
|
}
|
|
|
|
void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
|
|
Bytecodes::Code code, 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) {
|
|
resolved_klass = SystemDictionary::MethodHandle_klass();
|
|
Symbol* method_name = vmSymbols::invoke_name();
|
|
Symbol* method_signature = pool->signature_ref_at(index);
|
|
KlassHandle current_klass(THREAD, pool->pool_holder());
|
|
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
|
|
return;
|
|
}
|
|
|
|
resolve_klass(resolved_klass, pool, index, CHECK);
|
|
|
|
Symbol* method_name = pool->name_ref_at(index);
|
|
Symbol* method_signature = pool->signature_ref_at(index);
|
|
KlassHandle current_klass(THREAD, pool->pool_holder());
|
|
|
|
if (pool->has_preresolution()
|
|
|| (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
|
|
MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
|
|
Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
|
|
if (result_oop != NULL) {
|
|
resolved_method = methodHandle(THREAD, result_oop);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (code == Bytecodes::_invokeinterface) {
|
|
resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
|
|
} else if (code == Bytecodes::_invokevirtual) {
|
|
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
|
|
} else if (!resolved_klass->is_interface()) {
|
|
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
|
|
} else {
|
|
bool nostatics = (code == Bytecodes::_invokestatic) ? false : true;
|
|
resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, nostatics, CHECK);
|
|
}
|
|
}
|
|
|
|
void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
|
|
Symbol* method_name, Symbol* method_signature,
|
|
KlassHandle current_klass, bool check_access,
|
|
bool require_methodref, TRAPS) {
|
|
|
|
Handle nested_exception;
|
|
|
|
// 1. check if methodref required, that resolved_klass is not interfacemethodref
|
|
if (require_methodref && 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(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
// 2. lookup method in resolved klass and its super klasses
|
|
lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, true, false, CHECK);
|
|
|
|
if (resolved_method.is_null() && !resolved_klass->oop_is_array()) { // not found in the class hierarchy
|
|
// 3. lookup method in all the interfaces implemented by the resolved klass
|
|
lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
|
|
|
|
if (resolved_method.is_null()) {
|
|
// JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
|
|
lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
|
|
current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
nested_exception = Handle(THREAD, PENDING_EXCEPTION);
|
|
CLEAR_PENDING_EXCEPTION;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (resolved_method.is_null()) {
|
|
// 4. method lookup failed
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
|
|
Method::name_and_sig_as_C_string(resolved_klass(),
|
|
method_name,
|
|
method_signature),
|
|
nested_exception);
|
|
}
|
|
|
|
// 5. access checks, access checking may be turned off when calling from within the VM.
|
|
if (check_access) {
|
|
assert(current_klass.not_null() , "current_klass should not be null");
|
|
|
|
// check if method can be accessed by the referring class
|
|
check_method_accessability(current_klass,
|
|
resolved_klass,
|
|
KlassHandle(THREAD, resolved_method->method_holder()),
|
|
resolved_method,
|
|
CHECK);
|
|
|
|
// check loader constraints
|
|
Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
|
|
Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
|
|
{
|
|
ResourceMark rm(THREAD);
|
|
Symbol* failed_type_symbol =
|
|
SystemDictionary::check_signature_loaders(method_signature, loader,
|
|
class_loader, true, CHECK);
|
|
if (failed_type_symbol != NULL) {
|
|
const char* msg = "loader constraint violation: when resolving method"
|
|
" \"%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 = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
|
|
const char* loader1 = SystemDictionary::loader_name(loader());
|
|
char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
|
|
const char* loader2 = SystemDictionary::loader_name(class_loader());
|
|
char* target = InstanceKlass::cast(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) +
|
|
strlen(current) + strlen(loader2) + strlen(target) +
|
|
strlen(failed_type_name) + 1;
|
|
char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
|
|
jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
|
|
target, failed_type_name);
|
|
THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
|
|
KlassHandle resolved_klass,
|
|
Symbol* method_name,
|
|
Symbol* method_signature,
|
|
KlassHandle current_klass,
|
|
bool check_access,
|
|
bool nostatics, TRAPS) {
|
|
|
|
// 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(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
// lookup method in this interface or its super, java.lang.Object
|
|
// JDK8: also look for static methods
|
|
lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, false, true, CHECK);
|
|
|
|
if (resolved_method.is_null() && !resolved_klass->oop_is_array()) {
|
|
// lookup method in all the super-interfaces
|
|
lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
|
|
}
|
|
|
|
if (resolved_method.is_null()) {
|
|
// no method found
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
|
|
Method::name_and_sig_as_C_string(resolved_klass(),
|
|
method_name,
|
|
method_signature));
|
|
}
|
|
|
|
if (check_access) {
|
|
// JDK8 adds non-public interface methods, and accessability check requirement
|
|
assert(current_klass.not_null() , "current_klass should not be null");
|
|
|
|
// check if method can be accessed by the referring class
|
|
check_method_accessability(current_klass,
|
|
resolved_klass,
|
|
KlassHandle(THREAD, resolved_method->method_holder()),
|
|
resolved_method,
|
|
CHECK);
|
|
|
|
HandleMark hm(THREAD);
|
|
Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
|
|
Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
|
|
{
|
|
ResourceMark rm(THREAD);
|
|
Symbol* failed_type_symbol =
|
|
SystemDictionary::check_signature_loaders(method_signature, loader,
|
|
class_loader, true, CHECK);
|
|
if (failed_type_symbol != NULL) {
|
|
const char* msg = "loader constraint violation: when resolving "
|
|
"interface method \"%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 = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
|
|
const char* loader1 = SystemDictionary::loader_name(loader());
|
|
char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
|
|
const char* loader2 = SystemDictionary::loader_name(class_loader());
|
|
char* target = InstanceKlass::cast(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) +
|
|
strlen(current) + strlen(loader2) + strlen(target) +
|
|
strlen(failed_type_name) + 1;
|
|
char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
|
|
jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
|
|
target, failed_type_name);
|
|
THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (nostatics && 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(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
if (TraceItables && Verbose) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
|
|
(current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
|
|
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
|
|
Method::name_and_sig_as_C_string(resolved_klass(),
|
|
resolved_method->name(),
|
|
resolved_method->signature()),
|
|
resolved_method->method_holder()->internal_name()
|
|
);
|
|
resolved_method->access_flags().print_on(tty);
|
|
if (resolved_method->is_default_method()) {
|
|
tty->print("default ");
|
|
}
|
|
if (resolved_method->is_overpass()) {
|
|
tty->print("overpass");
|
|
}
|
|
tty->cr();
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
// Field resolution
|
|
|
|
void LinkResolver::check_field_accessability(KlassHandle ref_klass,
|
|
KlassHandle resolved_klass,
|
|
KlassHandle sel_klass,
|
|
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& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
|
|
// Load these early in case the resolve of the containing klass fails
|
|
Symbol* field = pool->name_ref_at(index);
|
|
Symbol* sig = pool->signature_ref_at(index);
|
|
|
|
// resolve specified klass
|
|
KlassHandle resolved_klass;
|
|
resolve_klass(resolved_klass, pool, index, CHECK);
|
|
|
|
KlassHandle current_klass(THREAD, pool->pool_holder());
|
|
resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
|
|
}
|
|
|
|
void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
|
|
KlassHandle current_klass, Bytecodes::Code byte, bool check_access, 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 && !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
|
|
if (resolved_klass.is_null()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
|
|
}
|
|
|
|
// Resolve instance field
|
|
KlassHandle sel_klass(THREAD, 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.is_null()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
|
|
}
|
|
|
|
if (!check_access)
|
|
// Access checking may be turned off when calling from within the VM.
|
|
return;
|
|
|
|
// check access
|
|
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);
|
|
}
|
|
|
|
// Final fields can only be accessed from its own class.
|
|
if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
|
|
THROW(vmSymbols::java_lang_IllegalAccessError());
|
|
}
|
|
|
|
// 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()) {
|
|
HandleMark hm(THREAD);
|
|
Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
|
|
Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
|
|
{
|
|
ResourceMark rm(THREAD);
|
|
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 = SystemDictionary::loader_name(ref_loader());
|
|
char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
|
|
const char* loader2 = 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) +
|
|
strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
|
|
char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
|
|
jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
|
|
failed_type_name);
|
|
THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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, KlassHandle& resolved_klass, Symbol* method_name,
|
|
Symbol* method_signature, KlassHandle current_klass,
|
|
bool check_access, bool initialize_class, TRAPS) {
|
|
methodHandle resolved_method;
|
|
linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
|
|
resolved_klass = KlassHandle(THREAD, 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);
|
|
linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
|
|
}
|
|
|
|
// setup result
|
|
result.set_static(resolved_klass, resolved_method, CHECK);
|
|
}
|
|
|
|
// throws linktime exceptions
|
|
void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
|
|
Symbol* method_name, Symbol* method_signature,
|
|
KlassHandle current_klass, bool check_access, TRAPS) {
|
|
|
|
if (!resolved_klass->is_interface()) {
|
|
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
|
|
} else {
|
|
resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
|
|
}
|
|
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(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
|
|
Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
|
|
methodHandle resolved_method;
|
|
linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
|
|
runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
|
|
}
|
|
|
|
// throws linktime exceptions
|
|
void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
|
|
Symbol* method_name, Symbol* method_signature,
|
|
KlassHandle current_klass, bool check_access, 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
|
|
|
|
if (!resolved_klass->is_interface()) {
|
|
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
|
|
} else {
|
|
resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
|
|
// check if invokespecial's interface method reference is in an indirect superinterface
|
|
if (!current_klass.is_null() && resolved_klass->is_interface()) {
|
|
Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ?
|
|
current_klass() :
|
|
InstanceKlass::cast(current_klass())->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 &&
|
|
!InstanceKlass::cast(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(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(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
if (TraceItables && Verbose) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
|
|
(current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
|
|
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
|
|
Method::name_and_sig_as_C_string(resolved_klass(),
|
|
resolved_method->name(),
|
|
resolved_method->signature()),
|
|
resolved_method->method_holder()->internal_name()
|
|
);
|
|
resolved_method->access_flags().print_on(tty);
|
|
if (resolved_method->is_default_method()) {
|
|
tty->print("default ");
|
|
}
|
|
if (resolved_method->is_overpass()) {
|
|
tty->print("overpass");
|
|
}
|
|
tty->cr();
|
|
}
|
|
}
|
|
|
|
// throws runtime exceptions
|
|
void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
|
|
KlassHandle current_klass, bool check_access, TRAPS) {
|
|
|
|
// 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());
|
|
|
|
// check if this is an old-style super call and do a new lookup if so
|
|
{ KlassHandle method_klass = KlassHandle(THREAD,
|
|
resolved_method->method_holder());
|
|
|
|
if (check_access &&
|
|
// a) check if ACC_SUPER flag is set for the current class
|
|
(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() &&
|
|
// c) check if the method is not <init>
|
|
resolved_method->name() != vmSymbols::object_initializer_name()) {
|
|
// Lookup super method
|
|
KlassHandle super_klass(THREAD, current_klass->super());
|
|
lookup_instance_method_in_klasses(sel_method, 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 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 (TraceItables && Verbose) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
|
|
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
|
|
Method::name_and_sig_as_C_string(resolved_klass(),
|
|
sel_method->name(),
|
|
sel_method->signature()),
|
|
sel_method->method_holder()->internal_name()
|
|
);
|
|
sel_method->access_flags().print_on(tty);
|
|
if (sel_method->is_default_method()) {
|
|
tty->print("default ");
|
|
}
|
|
if (sel_method->is_overpass()) {
|
|
tty->print("overpass");
|
|
}
|
|
tty->cr();
|
|
}
|
|
|
|
// setup result
|
|
result.set_static(resolved_klass, sel_method, CHECK);
|
|
}
|
|
|
|
void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
|
|
Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
|
|
bool check_access, bool check_null_and_abstract, TRAPS) {
|
|
methodHandle resolved_method;
|
|
linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
|
|
runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
|
|
}
|
|
|
|
// throws linktime exceptions
|
|
void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
|
|
Symbol* method_name, Symbol* method_signature,
|
|
KlassHandle current_klass, bool check_access, TRAPS) {
|
|
// normal method resolution
|
|
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
|
|
|
|
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
|
|
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.is_null() ? "<NULL>" : current_klass->internal_name()));
|
|
THROW_MSG(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(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
|
|
}
|
|
|
|
if (PrintVtables && Verbose) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
|
|
(current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
|
|
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
|
|
Method::name_and_sig_as_C_string(resolved_klass(),
|
|
resolved_method->name(),
|
|
resolved_method->signature()),
|
|
resolved_method->method_holder()->internal_name()
|
|
);
|
|
resolved_method->access_flags().print_on(tty);
|
|
if (resolved_method->is_default_method()) {
|
|
tty->print("default ");
|
|
}
|
|
if (resolved_method->is_overpass()) {
|
|
tty->print("overpass");
|
|
}
|
|
tty->cr();
|
|
}
|
|
}
|
|
|
|
// throws runtime exceptions
|
|
void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
|
|
methodHandle resolved_method,
|
|
KlassHandle resolved_klass,
|
|
Handle recv,
|
|
KlassHandle recv_klass,
|
|
bool check_null_and_abstract,
|
|
TRAPS) {
|
|
|
|
// setup default return values
|
|
int vtable_index = Method::invalid_vtable_index;
|
|
methodHandle selected_method;
|
|
|
|
assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
|
|
|
|
// 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()) { // 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");
|
|
|
|
InstanceKlass* inst = InstanceKlass::cast(recv_klass());
|
|
selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
|
|
} else {
|
|
// at this point we are sure that resolved_method is virtual and not
|
|
// a 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 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 {
|
|
// recv_klass might be an arrayKlassOop but all vtables start at
|
|
// the same place. The cast is to avoid virtual call and assertion.
|
|
InstanceKlass* inst = (InstanceKlass*)recv_klass();
|
|
selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
|
|
}
|
|
}
|
|
|
|
// check if method exists
|
|
if (selected_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 if abstract
|
|
if (check_null_and_abstract && selected_method->is_abstract()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
|
|
Method::name_and_sig_as_C_string(resolved_klass(),
|
|
selected_method->name(),
|
|
selected_method->signature()));
|
|
}
|
|
|
|
if (PrintVtables && Verbose) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ",
|
|
(recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
|
|
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
|
|
Method::name_and_sig_as_C_string(resolved_klass(),
|
|
resolved_method->name(),
|
|
resolved_method->signature()),
|
|
selected_method->method_holder()->internal_name(),
|
|
vtable_index
|
|
);
|
|
selected_method->access_flags().print_on(tty);
|
|
if (selected_method->is_default_method()) {
|
|
tty->print("default ");
|
|
}
|
|
if (selected_method->is_overpass()) {
|
|
tty->print("overpass");
|
|
}
|
|
tty->cr();
|
|
}
|
|
// 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, KlassHandle recv_klass, KlassHandle resolved_klass,
|
|
Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
|
|
bool check_access, bool check_null_and_abstract, TRAPS) {
|
|
methodHandle resolved_method;
|
|
linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
|
|
runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
|
|
}
|
|
|
|
// throws linktime exceptions
|
|
void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
|
|
Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
|
|
// normal interface method resolution
|
|
resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
|
|
|
|
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");
|
|
}
|
|
|
|
// throws runtime exceptions
|
|
void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
|
|
Handle recv, KlassHandle 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 private interface 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 invokeinterface: 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 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
|
|
methodHandle sel_method;
|
|
// This search must match the linktime preparation search for itable initialization
|
|
// to correctly enforce loader constraints for interface method inheritance
|
|
lookup_instance_method_in_klasses(sel_method, recv_klass,
|
|
resolved_method->name(),
|
|
resolved_method->signature(), CHECK);
|
|
if (sel_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.
|
|
sel_method = resolved_method;
|
|
}
|
|
// check if method exists
|
|
if (sel_method.is_null()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
|
|
Method::name_and_sig_as_C_string(recv_klass(),
|
|
resolved_method->name(),
|
|
resolved_method->signature()));
|
|
}
|
|
// check access
|
|
// Throw Illegal Access Error if sel_method is not public.
|
|
if (!sel_method->is_public()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
|
|
Method::name_and_sig_as_C_string(recv_klass(),
|
|
sel_method->name(),
|
|
sel_method->signature()));
|
|
}
|
|
// check if abstract
|
|
if (check_null_and_abstract && sel_method->is_abstract()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
|
|
Method::name_and_sig_as_C_string(recv_klass(),
|
|
sel_method->name(),
|
|
sel_method->signature()));
|
|
}
|
|
|
|
if (TraceItables && Verbose) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
|
|
(recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
|
|
(resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
|
|
Method::name_and_sig_as_C_string(resolved_klass(),
|
|
resolved_method->name(),
|
|
resolved_method->signature()),
|
|
sel_method->method_holder()->internal_name()
|
|
);
|
|
sel_method->access_flags().print_on(tty);
|
|
if (sel_method->is_default_method()) {
|
|
tty->print("default ");
|
|
}
|
|
if (sel_method->is_overpass()) {
|
|
tty->print("overpass");
|
|
}
|
|
tty->cr();
|
|
}
|
|
// setup result
|
|
if (!resolved_method->has_itable_index()) {
|
|
int vtable_index = resolved_method->vtable_index();
|
|
assert(vtable_index == sel_method->vtable_index(), "sanity check");
|
|
result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
|
|
} else {
|
|
int itable_index = resolved_method()->itable_index();
|
|
result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
|
|
}
|
|
}
|
|
|
|
|
|
methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
|
|
KlassHandle resolved_klass,
|
|
Symbol* method_name,
|
|
Symbol* method_signature,
|
|
KlassHandle current_klass,
|
|
bool check_access) {
|
|
EXCEPTION_MARK;
|
|
methodHandle method_result;
|
|
linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
} else {
|
|
return method_result;
|
|
}
|
|
}
|
|
|
|
methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
|
|
KlassHandle resolved_klass,
|
|
Symbol* method_name,
|
|
Symbol* method_signature,
|
|
KlassHandle current_klass,
|
|
bool check_access) {
|
|
EXCEPTION_MARK;
|
|
methodHandle method_result;
|
|
linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
} else {
|
|
return method_result;
|
|
}
|
|
}
|
|
|
|
methodHandle LinkResolver::resolve_virtual_call_or_null(
|
|
KlassHandle receiver_klass,
|
|
KlassHandle resolved_klass,
|
|
Symbol* name,
|
|
Symbol* signature,
|
|
KlassHandle current_klass,
|
|
bool check_access) {
|
|
EXCEPTION_MARK;
|
|
CallInfo info;
|
|
resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, check_access, false, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
}
|
|
return info.selected_method();
|
|
}
|
|
|
|
methodHandle LinkResolver::resolve_interface_call_or_null(
|
|
KlassHandle receiver_klass,
|
|
KlassHandle resolved_klass,
|
|
Symbol* name,
|
|
Symbol* signature,
|
|
KlassHandle current_klass,
|
|
bool check_access) {
|
|
EXCEPTION_MARK;
|
|
CallInfo info;
|
|
resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, check_access, false, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
}
|
|
return info.selected_method();
|
|
}
|
|
|
|
int LinkResolver::resolve_virtual_vtable_index(
|
|
KlassHandle receiver_klass,
|
|
KlassHandle resolved_klass,
|
|
Symbol* name,
|
|
Symbol* signature,
|
|
KlassHandle current_klass) {
|
|
EXCEPTION_MARK;
|
|
CallInfo info;
|
|
resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, 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(
|
|
KlassHandle resolved_klass,
|
|
Symbol* name,
|
|
Symbol* signature,
|
|
KlassHandle current_klass,
|
|
bool check_access) {
|
|
EXCEPTION_MARK;
|
|
CallInfo info;
|
|
resolve_static_call(info, resolved_klass, name, signature, current_klass, check_access, false, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
}
|
|
return info.selected_method();
|
|
}
|
|
|
|
methodHandle LinkResolver::resolve_special_call_or_null(
|
|
KlassHandle resolved_klass,
|
|
Symbol* name,
|
|
Symbol* signature,
|
|
KlassHandle current_klass,
|
|
bool check_access) {
|
|
EXCEPTION_MARK;
|
|
CallInfo info;
|
|
resolve_special_call(info, resolved_klass, name, signature, current_klass, check_access, THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
CLEAR_PENDING_EXCEPTION;
|
|
return methodHandle();
|
|
}
|
|
return info.selected_method();
|
|
}
|
|
|
|
|
|
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
// ConstantPool entries
|
|
|
|
void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, 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, 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;
|
|
}
|
|
return;
|
|
}
|
|
|
|
void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
|
|
KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
|
|
// resolve klass
|
|
resolve_klass(resolved_klass, pool, index, CHECK);
|
|
|
|
// Get name, signature, and static klass
|
|
method_name = pool->name_ref_at(index);
|
|
method_signature = pool->signature_ref_at(index);
|
|
current_klass = KlassHandle(THREAD, pool->pool_holder());
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
|
|
KlassHandle resolved_klass;
|
|
Symbol* method_name = NULL;
|
|
Symbol* method_signature = NULL;
|
|
KlassHandle current_klass;
|
|
resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
|
|
resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
|
|
KlassHandle resolved_klass;
|
|
Symbol* method_name = NULL;
|
|
Symbol* method_signature = NULL;
|
|
KlassHandle current_klass;
|
|
resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
|
|
resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
|
|
constantPoolHandle pool, int index,
|
|
TRAPS) {
|
|
|
|
KlassHandle resolved_klass;
|
|
Symbol* method_name = NULL;
|
|
Symbol* method_signature = NULL;
|
|
KlassHandle current_klass;
|
|
resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
|
|
KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
|
|
resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
|
|
KlassHandle resolved_klass;
|
|
Symbol* method_name = NULL;
|
|
Symbol* method_signature = NULL;
|
|
KlassHandle current_klass;
|
|
resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
|
|
KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
|
|
resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
|
|
// This guy is reached from InterpreterRuntime::resolve_invokehandle.
|
|
KlassHandle resolved_klass;
|
|
Symbol* method_name = NULL;
|
|
Symbol* method_signature = NULL;
|
|
KlassHandle current_klass;
|
|
resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
|
|
if (TraceMethodHandles) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
|
|
}
|
|
resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
|
|
}
|
|
|
|
void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
|
|
Symbol* method_name, Symbol* method_signature,
|
|
KlassHandle current_klass,
|
|
TRAPS) {
|
|
// JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
|
|
assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
|
|
assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
|
|
methodHandle resolved_method;
|
|
Handle resolved_appendix;
|
|
Handle resolved_method_type;
|
|
lookup_polymorphic_method(resolved_method, resolved_klass,
|
|
method_name, method_signature,
|
|
current_klass, &resolved_appendix, &resolved_method_type, CHECK);
|
|
result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
|
|
}
|
|
|
|
|
|
void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
|
|
//resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
|
|
Symbol* method_name = pool->name_ref_at(index);
|
|
Symbol* method_signature = pool->signature_ref_at(index);
|
|
KlassHandle current_klass = KlassHandle(THREAD, 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);
|
|
if (cpce->is_f1_null()) {
|
|
int pool_index = cpce->constant_pool_index();
|
|
oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, 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, CHECK);
|
|
return;
|
|
}
|
|
|
|
if (TraceMethodHandles) {
|
|
ResourceMark rm(THREAD);
|
|
tty->print_cr("resolve_invokedynamic #%d %s %s",
|
|
ConstantPool::decode_invokedynamic_index(index),
|
|
method_name->as_C_string(), method_signature->as_C_string());
|
|
tty->print(" BSM info: "); bootstrap_specifier->print();
|
|
}
|
|
|
|
resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
|
|
}
|
|
|
|
void LinkResolver::resolve_dynamic_call(CallInfo& result,
|
|
Handle bootstrap_specifier,
|
|
Symbol* method_name, Symbol* method_signature,
|
|
KlassHandle 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,
|
|
bootstrap_specifier,
|
|
method_name, method_signature,
|
|
&resolved_appendix,
|
|
&resolved_method_type,
|
|
THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
if (TraceMethodHandles) {
|
|
tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
|
|
PENDING_EXCEPTION->print();
|
|
}
|
|
if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
|
|
// throw these guys, since they are already wrapped
|
|
return;
|
|
}
|
|
if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
|
|
// intercept only LinkageErrors which might have failed to wrap
|
|
return;
|
|
}
|
|
// See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
|
|
Handle nested_exception(THREAD, PENDING_EXCEPTION);
|
|
CLEAR_PENDING_EXCEPTION;
|
|
THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
|
|
}
|
|
result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
|
|
}
|
|
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
#ifndef PRODUCT
|
|
|
|
void CallInfo::print() {
|
|
ResourceMark rm;
|
|
const char* kindstr = "unknown";
|
|
switch (_call_kind) {
|
|
case direct_call: kindstr = "direct"; break;
|
|
case vtable_call: kindstr = "vtable"; break;
|
|
case itable_call: kindstr = "itable"; break;
|
|
}
|
|
tty->print_cr("Call %s@%d %s", kindstr, _call_index,
|
|
_resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
|
|
}
|
|
|
|
#endif
|