| /* |
| * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "jvm.h" |
| #include "classfile/defaultMethods.hpp" |
| #include "classfile/javaClasses.hpp" |
| #include "classfile/resolutionErrors.hpp" |
| #include "classfile/symbolTable.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "compiler/compileBroker.hpp" |
| #include "gc/shared/collectedHeap.inline.hpp" |
| #include "interpreter/bytecode.hpp" |
| #include "interpreter/interpreterRuntime.hpp" |
| #include "interpreter/linkResolver.hpp" |
| #include "logging/log.hpp" |
| #include "logging/logStream.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "memory/universe.hpp" |
| #include "oops/cpCache.inline.hpp" |
| #include "oops/instanceKlass.hpp" |
| #include "oops/method.hpp" |
| #include "oops/objArrayKlass.hpp" |
| #include "oops/objArrayOop.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "prims/methodHandles.hpp" |
| #include "prims/nativeLookup.hpp" |
| #include "runtime/compilationPolicy.hpp" |
| #include "runtime/fieldDescriptor.hpp" |
| #include "runtime/frame.inline.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/reflection.hpp" |
| #include "runtime/safepointVerifiers.hpp" |
| #include "runtime/signature.hpp" |
| #include "runtime/thread.inline.hpp" |
| #include "runtime/vmThread.hpp" |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Implementation of CallInfo |
| |
| |
| void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) { |
| int vtable_index = Method::nonvirtual_vtable_index; |
| set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK); |
| } |
| |
| |
| void CallInfo::set_interface(Klass* resolved_klass, |
| Klass* selected_klass, |
| const methodHandle& resolved_method, |
| const methodHandle& selected_method, |
| int itable_index, TRAPS) { |
| // This is only called for interface methods. If the resolved_method |
| // comes from java/lang/Object, it can be the subject of a virtual call, so |
| // we should pick the vtable index from the resolved method. |
| // In that case, the caller must call set_virtual instead of set_interface. |
| assert(resolved_method->method_holder()->is_interface(), ""); |
| assert(itable_index == resolved_method()->itable_index(), ""); |
| set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK); |
| } |
| |
| void CallInfo::set_virtual(Klass* resolved_klass, |
| Klass* selected_klass, |
| const methodHandle& resolved_method, |
| const methodHandle& selected_method, |
| int vtable_index, TRAPS) { |
| assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index"); |
| assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), ""); |
| CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call); |
| set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK); |
| assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call"); |
| } |
| |
| void CallInfo::set_handle(const methodHandle& resolved_method, |
| Handle resolved_appendix, |
| Handle resolved_method_type, TRAPS) { |
| set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK); |
| } |
| |
| void CallInfo::set_handle(Klass* resolved_klass, |
| const methodHandle& resolved_method, |
| Handle resolved_appendix, |
| Handle resolved_method_type, TRAPS) { |
| if (resolved_method.is_null()) { |
| THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null"); |
| } |
| assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic || |
| resolved_method->is_compiled_lambda_form(), |
| "linkMethod must return one of these"); |
| int vtable_index = Method::nonvirtual_vtable_index; |
| assert(!resolved_method->has_vtable_index(), ""); |
| set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK); |
| _resolved_appendix = resolved_appendix; |
| _resolved_method_type = resolved_method_type; |
| } |
| |
| void CallInfo::set_common(Klass* resolved_klass, |
| Klass* selected_klass, |
| const methodHandle& resolved_method, |
| const methodHandle& selected_method, |
| CallKind kind, |
| int index, |
| TRAPS) { |
| assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond"); |
| _resolved_klass = resolved_klass; |
| _selected_klass = selected_klass; |
| _resolved_method = resolved_method; |
| _selected_method = selected_method; |
| _call_kind = kind; |
| _call_index = index; |
| _resolved_appendix = Handle(); |
| DEBUG_ONLY(verify()); // verify before making side effects |
| |
| CompilationPolicy::compile_if_required(selected_method, THREAD); |
| } |
| |
| // utility query for unreflecting a method |
| CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) { |
| Klass* resolved_method_holder = resolved_method->method_holder(); |
| if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st |
| resolved_klass = resolved_method_holder; |
| } |
| _resolved_klass = resolved_klass; |
| _selected_klass = resolved_klass; |
| _resolved_method = resolved_method; |
| _selected_method = resolved_method; |
| // classify: |
| CallKind kind = CallInfo::unknown_kind; |
| int index = resolved_method->vtable_index(); |
| if (resolved_method->can_be_statically_bound()) { |
| kind = CallInfo::direct_call; |
| } else if (!resolved_method_holder->is_interface()) { |
| // Could be an Object method inherited into an interface, but still a vtable call. |
| kind = CallInfo::vtable_call; |
| } else if (!resolved_klass->is_interface()) { |
| // A default or miranda method. Compute the vtable index. |
| index = LinkResolver::vtable_index_of_interface_method(resolved_klass, |
| resolved_method); |
| assert(index >= 0 , "we should have valid vtable index at this point"); |
| |
| kind = CallInfo::vtable_call; |
| } else if (resolved_method->has_vtable_index()) { |
| // Can occur if an interface redeclares a method of Object. |
| |
| #ifdef ASSERT |
| // Ensure that this is really the case. |
| Klass* object_klass = SystemDictionary::Object_klass(); |
| Method * object_resolved_method = object_klass->vtable().method_at(index); |
| assert(object_resolved_method->name() == resolved_method->name(), |
| "Object and interface method names should match at vtable index %d, %s != %s", |
| index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string()); |
| assert(object_resolved_method->signature() == resolved_method->signature(), |
| "Object and interface method signatures should match at vtable index %d, %s != %s", |
| index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string()); |
| #endif // ASSERT |
| |
| kind = CallInfo::vtable_call; |
| } else { |
| // A regular interface call. |
| kind = CallInfo::itable_call; |
| index = resolved_method->itable_index(); |
| } |
| assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index); |
| _call_kind = kind; |
| _call_index = index; |
| _resolved_appendix = Handle(); |
| // Find or create a ResolvedMethod instance for this Method* |
| set_resolved_method_name(CHECK); |
| |
| DEBUG_ONLY(verify()); |
| } |
| |
| void CallInfo::set_resolved_method_name(TRAPS) { |
| Method* m = _resolved_method(); |
| assert(m != NULL, "Should already have a Method*"); |
| oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); |
| _resolved_method_name = Handle(THREAD, rmethod_name); |
| } |
| |
| #ifdef ASSERT |
| void CallInfo::verify() { |
| switch (call_kind()) { // the meaning and allowed value of index depends on kind |
| case CallInfo::direct_call: |
| if (_call_index == Method::nonvirtual_vtable_index) break; |
| // else fall through to check vtable index: |
| case CallInfo::vtable_call: |
| assert(resolved_klass()->verify_vtable_index(_call_index), ""); |
| break; |
| case CallInfo::itable_call: |
| assert(resolved_method()->method_holder()->verify_itable_index(_call_index), ""); |
| break; |
| case CallInfo::unknown_kind: |
| assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set"); |
| break; |
| default: |
| fatal("Unexpected call kind %d", call_kind()); |
| } |
| } |
| #endif // ASSERT |
| |
| #ifndef PRODUCT |
| void CallInfo::print() { |
| ResourceMark rm; |
| const char* kindstr; |
| switch (_call_kind) { |
| case direct_call: kindstr = "direct"; break; |
| case vtable_call: kindstr = "vtable"; break; |
| case itable_call: kindstr = "itable"; break; |
| default : kindstr = "unknown"; 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 |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Implementation of LinkInfo |
| |
| LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) { |
| // resolve klass |
| _resolved_klass = pool->klass_ref_at(index, CHECK); |
| |
| // Get name, signature, and static klass |
| _name = pool->name_ref_at(index); |
| _signature = pool->signature_ref_at(index); |
| _tag = pool->tag_ref_at(index); |
| _current_klass = pool->pool_holder(); |
| _current_method = current_method; |
| |
| // Coming from the constant pool always checks access |
| _check_access = true; |
| } |
| |
| LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) { |
| // resolve klass |
| _resolved_klass = pool->klass_ref_at(index, CHECK); |
| |
| // Get name, signature, and static klass |
| _name = pool->name_ref_at(index); |
| _signature = pool->signature_ref_at(index); |
| _tag = pool->tag_ref_at(index); |
| _current_klass = pool->pool_holder(); |
| _current_method = methodHandle(); |
| |
| // Coming from the constant pool always checks access |
| _check_access = true; |
| } |
| |
| char* LinkInfo::method_string() const { |
| return Method::name_and_sig_as_C_string(_resolved_klass, _name, _signature); |
| } |
| |
| #ifndef PRODUCT |
| void LinkInfo::print() { |
| ResourceMark rm; |
| tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s", |
| _resolved_klass->name()->as_C_string(), |
| _name->as_C_string(), |
| _signature->as_C_string(), |
| _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(), |
| _check_access ? "true" : "false"); |
| } |
| #endif // PRODUCT |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Klass resolution |
| |
| void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass, |
| bool fold_type_to_class, TRAPS) { |
| Klass* base_klass = sel_klass; |
| if (fold_type_to_class) { |
| if (sel_klass->is_objArray_klass()) { |
| base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass(); |
| } |
| // The element type could be a typeArray - we only need the access |
| // check if it is a reference to another class. |
| if (!base_klass->is_instance_klass()) { |
| return; // no relevant check to do |
| } |
| } |
| Reflection::VerifyClassAccessResults vca_result = |
| Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true); |
| if (vca_result != Reflection::ACCESS_OK) { |
| ResourceMark rm(THREAD); |
| char* msg = Reflection::verify_class_access_msg(ref_klass, |
| InstanceKlass::cast(base_klass), |
| vca_result); |
| bool same_module = (base_klass->module() == ref_klass->module()); |
| if (msg == NULL) { |
| Exceptions::fthrow( |
| THREAD_AND_LOCATION, |
| vmSymbols::java_lang_IllegalAccessError(), |
| "failed to access class %s from class %s (%s%s%s)", |
| base_klass->external_name(), |
| ref_klass->external_name(), |
| (same_module) ? base_klass->joint_in_module_of_loader(ref_klass) : base_klass->class_in_module_of_loader(), |
| (same_module) ? "" : "; ", |
| (same_module) ? "" : ref_klass->class_in_module_of_loader()); |
| } else { |
| // Use module specific message returned by verify_class_access_msg(). |
| Exceptions::fthrow( |
| THREAD_AND_LOCATION, |
| vmSymbols::java_lang_IllegalAccessError(), |
| "%s", msg); |
| } |
| } |
| } |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Method resolution |
| // |
| // According to JVM spec. $5.4.3c & $5.4.3d |
| |
| // Look up method in klasses, including static methods |
| // Then look up local default methods |
| Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info, |
| bool checkpolymorphism, |
| bool in_imethod_resolve) { |
| NoSafepointVerifier nsv; // Method* returned may not be reclaimed |
| |
| Klass* klass = link_info.resolved_klass(); |
| Symbol* name = link_info.name(); |
| Symbol* signature = link_info.signature(); |
| |
| // Ignore overpasses so statics can be found during resolution |
| Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass); |
| |
| if (klass->is_array_klass()) { |
| // Only consider klass and super klass for arrays |
| return result; |
| } |
| |
| InstanceKlass* ik = InstanceKlass::cast(klass); |
| |
| // JDK 8, JVMS 5.4.3.4: Interface method resolution should |
| // ignore static and non-public methods of java.lang.Object, |
| // like clone, finalize, registerNatives. |
| if (in_imethod_resolve && |
| result != NULL && |
| ik->is_interface() && |
| (result->is_static() || !result->is_public()) && |
| result->method_holder() == SystemDictionary::Object_klass()) { |
| result = NULL; |
| } |
| |
| // Before considering default methods, check for an overpass in the |
| // current class if a method has not been found. |
| if (result == NULL) { |
| result = ik->find_method(name, signature); |
| } |
| |
| if (result == NULL) { |
| Array<Method*>* default_methods = ik->default_methods(); |
| if (default_methods != NULL) { |
| result = InstanceKlass::find_method(default_methods, name, signature); |
| } |
| } |
| |
| if (checkpolymorphism && result != NULL) { |
| vmIntrinsics::ID iid = result->intrinsic_id(); |
| if (MethodHandles::is_signature_polymorphic(iid)) { |
| // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method. |
| return NULL; |
| } |
| } |
| return result; |
| } |
| |
| // returns first instance method |
| // Looks up method in classes, then looks up local default methods |
| methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass, |
| Symbol* name, |
| Symbol* signature, |
| Klass::PrivateLookupMode private_mode, TRAPS) { |
| Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode); |
| |
| while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) { |
| Klass* super_klass = result->method_holder()->super(); |
| result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode); |
| } |
| |
| if (klass->is_array_klass()) { |
| // Only consider klass and super klass for arrays |
| return methodHandle(THREAD, result); |
| } |
| |
| if (result == NULL) { |
| Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods(); |
| if (default_methods != NULL) { |
| result = InstanceKlass::find_method(default_methods, name, signature); |
| assert(result == NULL || !result->is_static(), "static defaults not allowed"); |
| } |
| } |
| return methodHandle(THREAD, result); |
| } |
| |
| int LinkResolver::vtable_index_of_interface_method(Klass* klass, |
| const methodHandle& resolved_method) { |
| |
| int vtable_index = Method::invalid_vtable_index; |
| Symbol* name = resolved_method->name(); |
| Symbol* signature = resolved_method->signature(); |
| InstanceKlass* ik = InstanceKlass::cast(klass); |
| |
| // First check in default method array |
| if (!resolved_method->is_abstract() && ik->default_methods() != NULL) { |
| int index = InstanceKlass::find_method_index(ik->default_methods(), |
| name, signature, Klass::find_overpass, |
| Klass::find_static, Klass::find_private); |
| if (index >= 0 ) { |
| vtable_index = ik->default_vtable_indices()->at(index); |
| } |
| } |
| if (vtable_index == Method::invalid_vtable_index) { |
| // get vtable_index for miranda methods |
| klassVtable vt = ik->vtable(); |
| vtable_index = vt.index_of_miranda(name, signature); |
| } |
| return vtable_index; |
| } |
| |
| Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) { |
| InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass()); |
| |
| // Specify 'true' in order to skip default methods when searching the |
| // interfaces. Function lookup_method_in_klasses() already looked for |
| // the method in the default methods table. |
| return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults); |
| } |
| |
| methodHandle LinkResolver::lookup_polymorphic_method( |
| const LinkInfo& link_info, |
| Handle *appendix_result_or_null, |
| Handle *method_type_result, |
| TRAPS) { |
| Klass* klass = link_info.resolved_klass(); |
| Symbol* name = link_info.name(); |
| Symbol* full_signature = link_info.signature(); |
| |
| 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"); |
| |
| bool can_access = Reflection::verify_member_access(ref_klass, |
| resolved_klass, |
| sel_klass, |
| flags, |
| true, false, CHECK); |
| // Any existing exceptions that may have been thrown, for example LinkageErrors |
| // from nest-host resolution, have been allowed to propagate. |
| if (!can_access) { |
| ResourceMark rm(THREAD); |
| bool same_module = (sel_klass->module() == ref_klass->module()); |
| Exceptions::fthrow( |
| THREAD_AND_LOCATION, |
| vmSymbols::java_lang_IllegalAccessError(), |
| "class %s tried to access %s%s%smethod %s.%s%s (%s%s%s)", |
| ref_klass->external_name(), |
| sel_method->is_abstract() ? "abstract " : "", |
| sel_method->is_protected() ? "protected " : "", |
| sel_method->is_private() ? "private " : "", |
| sel_klass->external_name(), |
| sel_method->name()->as_C_string(), |
| sel_method->signature()->as_C_string(), |
| (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(), |
| (same_module) ? "" : "; ", |
| (same_module) ? "" : sel_klass->class_in_module_of_loader() |
| ); |
| 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) { |
| Klass* current_class = link_info.current_klass(); |
| ClassLoaderData* current_loader_data = current_class->class_loader_data(); |
| assert(current_loader_data != NULL, "current class has no class loader data"); |
| Klass* resolved_method_class = resolved_method->method_holder(); |
| ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data(); |
| assert(target_loader_data != NULL, "resolved method's class has no class loader data"); |
| |
| stringStream ss; |
| ss.print("loader constraint violation: when resolving %s" |
| " \"%s\" the class loader %s of the current class, %s," |
| " and the class loader %s for the method's defining class, %s, have" |
| " different Class objects for the type %s used in the signature (%s; %s)", |
| method_type, |
| link_info.method_string(), |
| current_loader_data->loader_name_and_id(), |
| current_class->name()->as_C_string(), |
| target_loader_data->loader_name_and_id(), |
| resolved_method_class->name()->as_C_string(), |
| failed_type_symbol->as_C_string(), |
| current_class->class_in_module_of_loader(false, true), |
| resolved_method_class->class_in_module_of_loader(false, true)); |
| THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string()); |
| } |
| } |
| |
| 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) { |
| stringStream ss; |
| const char* failed_type_name = failed_type_symbol->as_klass_external_name(); |
| |
| ss.print("loader constraint violation: when resolving field" |
| " \"%s\" of type %s, the class loader %s of the current class, " |
| "%s, and the class loader %s for the field's defining " |
| "type, %s, have different Class objects for type %s (%s; %s)", |
| field->as_C_string(), |
| failed_type_name, |
| current_klass->class_loader_data()->loader_name_and_id(), |
| current_klass->external_name(), |
| sel_klass->class_loader_data()->loader_name_and_id(), |
| sel_klass->external_name(), |
| failed_type_name, |
| current_klass->class_in_module_of_loader(false, true), |
| sel_klass->class_in_module_of_loader(false, true)); |
| THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string()); |
| } |
| } |
| |
| 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); |
| } |
| |
| // 6. 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); |
| } |
| |
| // For private method invocation we should only find the method in the resolved class. |
| // If that is not the case then we have a found a supertype method that we have nestmate |
| // access to. |
| if (resolved_method->is_private() && resolved_method->method_holder() != resolved_klass) { |
| ResourceMark rm(THREAD); |
| DEBUG_ONLY(bool is_nestmate = InstanceKlass::cast(link_info.current_klass())->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD);) |
| assert(is_nestmate, "was only expecting nestmates to get here!"); |
| 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; |
| } |
| |
| 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 (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) { |
| bool can_access = Reflection::verify_member_access(ref_klass, |
| resolved_klass, |
| sel_klass, |
| fd.access_flags(), |
| true, false, CHECK); |
| // Any existing exceptions that may have been thrown, for example LinkageErrors |
| // from nest-host resolution, have been allowed to propagate. |
| if (!can_access) { |
| bool same_module = (sel_klass->module() == ref_klass->module()); |
| ResourceMark rm(THREAD); |
| Exceptions::fthrow( |
| THREAD_AND_LOCATION, |
| vmSymbols::java_lang_IllegalAccessError(), |
| "class %s tried to access %s%sfield %s.%s (%s%s%s)", |
| ref_klass->external_name(), |
| fd.is_protected() ? "protected " : "", |
| fd.is_private() ? "private " : "", |
| sel_klass->external_name(), |
| fd.name()->as_C_string(), |
| (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(), |
| (same_module) ? "" : "; ", |
| (same_module) ? "" : sel_klass->class_in_module_of_loader() |
| ); |
| 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; |
| } |
| |
| // ensure that invokespecial's interface method reference is in |
| // a direct superinterface, not 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_unsafe_anonymous() ? |
| ck : |
| InstanceKlass::cast(ck->unsafe_anonymous_host()); |
| // 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()) { |
| |
| Klass* current_klass = link_info.current_klass(); |
| |
| // 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. |
| if (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(), |
| Klass::find_private, 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_unsafe_anonymous() ? sender->unsafe_anonymous_host() : 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 of nonvirtual_vtable_index for private |
| // methods, or for final methods. Private methods never appear in the vtable |
| // and never override other methods. As an optimization, final methods are |
| // never put in the vtable, unless they override an existing method. |
| // So if we do get nonvirtual_vtable_index, it means the selected method is the |
| // resolved 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); |
| } |
| |
| methodHandle selected_method = resolved_method; |
| |
| // resolve the method in the receiver class, unless it is private |
| if (!resolved_method()->is_private()) { |
| // 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. |
| // Private methods are skipped as the resolved method was not private. |
| selected_method = lookup_instance_method_in_klasses(recv_klass, |
| resolved_method->name(), |
| resolved_method->signature(), |
| Klass::skip_private, 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_vtable_index()) { |
| int vtable_index = resolved_method->vtable_index(); |
| log_develop_trace(itables)(" -- vtable index: %d", 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 if (resolved_method->has_itable_index()) { |
| int itable_index = resolved_method()->itable_index(); |
| log_develop_trace(itables)(" -- itable index: %d", itable_index); |
| result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK); |
| } else { |
| int index = resolved_method->vtable_index(); |
| log_develop_trace(itables)(" -- non itable/vtable index: %d", index); |
| assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!"); |
| assert(resolved_method()->is_private() || |
| (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()), |
| "Should only have non-virtual invokeinterface for private or final-Object methods!"); |
| assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!"); |
| // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods) |
| result.set_virtual(resolved_klass, resolved_klass, resolved_method, resolved_method, 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()); |
| } |