| /* |
| * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| #include "incls/_precompiled.incl" |
| #include "incls/_linkResolver.cpp.incl" |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Implementation of FieldAccessInfo |
| |
| void FieldAccessInfo::set(KlassHandle klass, symbolHandle name, int field_index, int field_offset, |
| BasicType field_type, AccessFlags access_flags) { |
| _klass = klass; |
| _name = name; |
| _field_index = field_index; |
| _field_offset = field_offset; |
| _field_type = field_type; |
| _access_flags = access_flags; |
| } |
| |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Implementation of CallInfo |
| |
| |
| void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) { |
| int vtable_index = methodOopDesc::nonvirtual_vtable_index; |
| set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); |
| } |
| |
| |
| void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, 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. |
| // Other than that case, there is no valid vtable index to specify. |
| int vtable_index = methodOopDesc::invalid_vtable_index; |
| if (resolved_method->method_holder() == SystemDictionary::object_klass()) { |
| assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check"); |
| vtable_index = resolved_method->vtable_index(); |
| } |
| set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); |
| } |
| |
| void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { |
| assert(vtable_index >= 0 || vtable_index == methodOopDesc::nonvirtual_vtable_index, "valid index"); |
| set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); |
| } |
| |
| void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_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; |
| _vtable_index = vtable_index; |
| if (CompilationPolicy::mustBeCompiled(selected_method)) { |
| // Note: with several active threads, the mustBeCompiled may be true |
| // while canBeCompiled is false; remove assert |
| // assert(CompilationPolicy::canBeCompiled(selected_method), "cannot compile"); |
| if (THREAD->is_Compiler_thread()) { |
| // don't force compilation, resolve was on behalf of compiler |
| return; |
| } |
| CompileBroker::compile_method(selected_method, InvocationEntryBci, |
| methodHandle(), 0, "mustBeCompiled", CHECK); |
| } |
| } |
| |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Klass resolution |
| |
| void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) { |
| if (!Reflection::verify_class_access(ref_klass->as_klassOop(), |
| sel_klass->as_klassOop(), |
| true)) { |
| ResourceMark rm(THREAD); |
| Exceptions::fthrow( |
| THREAD_AND_LOCATION, |
| vmSymbolHandles::java_lang_IllegalAccessError(), |
| "tried to access class %s from class %s", |
| sel_klass->external_name(), |
| ref_klass->external_name() |
| ); |
| return; |
| } |
| } |
| |
| void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { |
| klassOop result_oop = pool->klass_ref_at(index, CHECK); |
| result = KlassHandle(THREAD, result_oop); |
| } |
| |
| void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { |
| klassOop result_oop = |
| constantPoolOopDesc::klass_ref_at_if_loaded_check(pool, index, CHECK); |
| result = KlassHandle(THREAD, result_oop); |
| } |
| |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Method resolution |
| // |
| // According to JVM spec. $5.4.3c & $5.4.3d |
| |
| void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) { |
| methodOop result_oop = klass->uncached_lookup_method(name(), signature()); |
| result = methodHandle(THREAD, result_oop); |
| } |
| |
| // returns first instance method |
| void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) { |
| methodOop result_oop = klass->uncached_lookup_method(name(), signature()); |
| result = methodHandle(THREAD, result_oop); |
| while (!result.is_null() && result->is_static()) { |
| klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super()); |
| result = methodHandle(THREAD, klass->uncached_lookup_method(name(), signature())); |
| } |
| } |
| |
| |
| int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) { |
| ResourceMark rm(THREAD); |
| klassVtable *vt = instanceKlass::cast(klass())->vtable(); |
| return vt->index_of_miranda(name(), signature()); |
| } |
| |
| void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) { |
| instanceKlass *ik = instanceKlass::cast(klass()); |
| result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name(), signature())); |
| } |
| |
| 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); |
| } |
| |
| if (!Reflection::verify_field_access(ref_klass->as_klassOop(), |
| resolved_klass->as_klassOop(), |
| sel_klass->as_klassOop(), |
| flags, |
| true)) { |
| ResourceMark rm(THREAD); |
| Exceptions::fthrow( |
| THREAD_AND_LOCATION, |
| vmSymbolHandles::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(methodHandle& resolved_method, KlassHandle& resolved_klass, |
| constantPoolHandle pool, int index, TRAPS) { |
| |
| // resolve klass |
| resolve_klass(resolved_klass, pool, index, CHECK); |
| |
| symbolHandle method_name (THREAD, pool->name_ref_at(index)); |
| symbolHandle method_signature (THREAD, 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, CHECK); |
| } |
| |
| void LinkResolver::resolve_interface_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) { |
| |
| // resolve klass |
| resolve_klass(resolved_klass, pool, index, CHECK); |
| symbolHandle method_name (THREAD, pool->name_ref_at(index)); |
| symbolHandle method_signature (THREAD, pool->signature_ref_at(index)); |
| KlassHandle current_klass(THREAD, pool->pool_holder()); |
| |
| resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
| } |
| |
| |
| void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, |
| symbolHandle method_name, symbolHandle method_signature, |
| KlassHandle current_klass, bool check_access, TRAPS) { |
| |
| // 1. check if klass is not interface |
| if (resolved_klass->is_interface()) { |
| char buf[200]; |
| jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(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, CHECK); |
| |
| if (resolved_method.is_null()) { // 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()) { |
| // 4. method lookup failed |
| ResourceMark rm(THREAD); |
| THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| method_name(), |
| method_signature())); |
| } |
| } |
| |
| // 5. check if method is concrete |
| if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { |
| ResourceMark rm(THREAD); |
| THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| method_name(), |
| method_signature())); |
| } |
| |
| // 6. 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, instanceKlass::cast(resolved_method->method_holder())->class_loader()); |
| { |
| ResourceMark rm(THREAD); |
| char* failed_type_name = |
| SystemDictionary::check_signature_loaders(method_signature, loader, |
| class_loader, true, CHECK); |
| if (failed_type_name != 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 resolved class, %s, have" |
| " different Class objects for the type %s used in the signature"; |
| char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(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* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); |
| size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
| strlen(current) + strlen(loader2) + strlen(resolved) + |
| strlen(failed_type_name); |
| char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); |
| jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, |
| resolved, failed_type_name); |
| THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); |
| } |
| } |
| } |
| } |
| |
| void LinkResolver::resolve_interface_method(methodHandle& resolved_method, |
| KlassHandle resolved_klass, |
| symbolHandle method_name, |
| symbolHandle method_signature, |
| KlassHandle current_klass, |
| bool check_access, TRAPS) { |
| |
| // check if klass is interface |
| if (!resolved_klass->is_interface()) { |
| char buf[200]; |
| jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name()); |
| THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); |
| } |
| |
| // lookup method in this interface or its super, java.lang.Object |
| lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); |
| |
| if (resolved_method.is_null()) { |
| // 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(), |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| method_name(), |
| method_signature())); |
| } |
| } |
| |
| if (check_access) { |
| HandleMark hm(THREAD); |
| Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); |
| Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); |
| { |
| ResourceMark rm(THREAD); |
| char* failed_type_name = |
| SystemDictionary::check_signature_loaders(method_signature, loader, |
| class_loader, true, CHECK); |
| if (failed_type_name != 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 " |
| "resolved class, %s, have different Class objects for the type %s " |
| "used in the signature"; |
| char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(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* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); |
| size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
| strlen(current) + strlen(loader2) + strlen(resolved) + |
| strlen(failed_type_name); |
| char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); |
| jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, |
| resolved, failed_type_name); |
| THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); |
| } |
| } |
| } |
| } |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // 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->as_klassOop(), |
| resolved_klass->as_klassOop(), |
| sel_klass->as_klassOop(), |
| fd.access_flags(), |
| true)) { |
| ResourceMark rm(THREAD); |
| Exceptions::fthrow( |
| THREAD_AND_LOCATION, |
| vmSymbolHandles::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(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) { |
| resolve_field(result, pool, index, byte, check_only, true, CHECK); |
| } |
| |
| void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) { |
| assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || |
| byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode"); |
| |
| bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); |
| bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); |
| |
| // resolve specified klass |
| KlassHandle resolved_klass; |
| if (update_pool) { |
| resolve_klass(resolved_klass, pool, index, CHECK); |
| } else { |
| resolve_klass_no_update(resolved_klass, pool, index, CHECK); |
| } |
| // Load these early in case the resolve of the containing klass fails |
| symbolOop field = pool->name_ref_at(index); |
| symbolHandle field_h (THREAD, field); // preserve in case we need the name |
| symbolOop sig = pool->signature_ref_at(index); |
| // 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 |
| fieldDescriptor fd; // find_field initializes fd if found |
| KlassHandle sel_klass(THREAD, instanceKlass::cast(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()); |
| } |
| |
| // check access |
| KlassHandle ref_klass(THREAD, pool->pool_holder()); |
| check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK); |
| |
| // check for errors |
| if (is_static != fd.is_static()) { |
| char msg[200]; |
| jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", Klass::cast(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() != pool->pool_holder()) { |
| 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 && !check_only) { |
| sel_klass->initialize(CHECK); |
| } |
| |
| { |
| HandleMark hm(THREAD); |
| Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader()); |
| Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader()); |
| symbolHandle signature_ref (THREAD, pool->signature_ref_at(index)); |
| { |
| ResourceMark rm(THREAD); |
| char* failed_type_name = |
| SystemDictionary::check_signature_loaders(signature_ref, |
| ref_loader, sel_loader, |
| false, |
| CHECK); |
| if (failed_type_name != 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_h()->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()); |
| size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + |
| strlen(sel) + strlen(loader2) + strlen(failed_type_name); |
| 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. |
| KlassHandle holder (THREAD, fd.field_holder()); |
| symbolHandle name (THREAD, fd.name()); |
| result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags()); |
| } |
| |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // 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, symbolHandle method_name, |
| symbolHandle 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, Klass::cast(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, |
| symbolHandle method_name, symbolHandle method_signature, |
| KlassHandle current_klass, bool check_access, TRAPS) { |
| |
| resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); |
| assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); |
| |
| // check if static |
| if (!resolved_method->is_static()) { |
| char buf[200]; |
| jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(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, symbolHandle method_name, |
| symbolHandle 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, |
| symbolHandle method_name, symbolHandle method_signature, |
| KlassHandle current_klass, bool check_access, TRAPS) { |
| |
| resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, 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, |
| vmSymbolHandles::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 not static |
| if (resolved_method->is_static()) { |
| char buf[200]; |
| jio_snprintf(buf, sizeof(buf), |
| "Expecting non-static method %s", |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| resolved_method->name(), |
| resolved_method->signature())); |
| THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); |
| } |
| } |
| |
| // 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 |
| 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() && |
| // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!) |
| current_klass->is_subtype_of(method_klass()) && current_klass() != method_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, |
| symbolHandle(THREAD, resolved_method->name()), |
| symbolHandle(THREAD, resolved_method->signature()), CHECK); |
| // check if found |
| if (sel_method.is_null()) { |
| ResourceMark rm(THREAD); |
| THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| resolved_method->name(), |
| resolved_method->signature())); |
| } |
| } |
| } |
| |
| // check if not static |
| if (sel_method->is_static()) { |
| char buf[200]; |
| jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(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(), |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| sel_method->name(), |
| sel_method->signature())); |
| } |
| |
| // 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, |
| symbolHandle method_name, symbolHandle 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, |
| symbolHandle method_name, symbolHandle 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, 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 not static |
| if (resolved_method->is_static()) { |
| char buf[200]; |
| jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| resolved_method->name(), |
| resolved_method->signature())); |
| THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); |
| } |
| } |
| |
| // 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 = methodOopDesc::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 methodOop's |
| // has not been rewritten, and the vtable initialized. |
| assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); |
| |
| // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop'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(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); |
| |
| // do lookup based on receiver klass using the vtable index |
| if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method |
| vtable_index = vtable_index_of_miranda_method(resolved_klass, |
| symbolHandle(THREAD, resolved_method->name()), |
| symbolHandle(THREAD, resolved_method->signature()), CHECK); |
| 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. |
| 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 == methodOopDesc::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()->klass_part(); |
| 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(), |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(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(), |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| selected_method->name(), |
| selected_method->signature())); |
| } |
| |
| // 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, |
| symbolHandle method_name, symbolHandle 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, symbolHandle method_name, |
| symbolHandle 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, 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 receiver klass implements the resolved interface |
| if (!recv_klass->is_subtype_of(resolved_klass())) { |
| char buf[200]; |
| jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", |
| (Klass::cast(recv_klass()))->external_name(), |
| (Klass::cast(resolved_klass()))->external_name()); |
| THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); |
| } |
| // do lookup based on receiver klass |
| methodHandle sel_method; |
| lookup_instance_method_in_klasses(sel_method, recv_klass, |
| symbolHandle(THREAD, resolved_method->name()), |
| symbolHandle(THREAD, resolved_method->signature()), CHECK); |
| // check if method exists |
| if (sel_method.is_null()) { |
| ResourceMark rm(THREAD); |
| THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), |
| resolved_method->name(), |
| resolved_method->signature())); |
| } |
| // check if public |
| if (!sel_method->is_public()) { |
| ResourceMark rm(THREAD); |
| THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(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(), |
| methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), |
| sel_method->name(), |
| sel_method->signature())); |
| } |
| // setup result |
| result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK); |
| } |
| |
| |
| methodHandle LinkResolver::linktime_resolve_interface_method_or_null( |
| KlassHandle resolved_klass, |
| symbolHandle method_name, |
| symbolHandle 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, |
| symbolHandle method_name, |
| symbolHandle 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, |
| symbolHandle name, |
| symbolHandle 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 methodHandle(); |
| } |
| return info.selected_method(); |
| } |
| |
| methodHandle LinkResolver::resolve_interface_call_or_null( |
| KlassHandle receiver_klass, |
| KlassHandle resolved_klass, |
| symbolHandle name, |
| symbolHandle signature, |
| KlassHandle current_klass) { |
| EXCEPTION_MARK; |
| CallInfo info; |
| resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, 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, |
| symbolHandle name, |
| symbolHandle 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 methodOopDesc::invalid_vtable_index; |
| } |
| return info.vtable_index(); |
| } |
| |
| methodHandle LinkResolver::resolve_static_call_or_null( |
| KlassHandle resolved_klass, |
| symbolHandle name, |
| symbolHandle signature, |
| KlassHandle current_klass) { |
| EXCEPTION_MARK; |
| CallInfo info; |
| resolve_static_call(info, resolved_klass, name, signature, current_klass, true, 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, symbolHandle name, symbolHandle signature, |
| KlassHandle current_klass) { |
| EXCEPTION_MARK; |
| CallInfo info; |
| resolve_special_call(info, resolved_klass, name, signature, current_klass, true, 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::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; |
| } |
| return; |
| } |
| |
| void LinkResolver::resolve_pool(KlassHandle& resolved_klass, symbolHandle& method_name, symbolHandle& 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 = symbolHandle(THREAD, pool->name_ref_at(index)); |
| method_signature = symbolHandle(THREAD, 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; |
| symbolHandle method_name; |
| symbolHandle method_signature; |
| 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; |
| symbolHandle method_name; |
| symbolHandle method_signature; |
| 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; |
| symbolHandle method_name; |
| symbolHandle method_signature; |
| KlassHandle current_klass; |
| resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); |
| KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)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; |
| symbolHandle method_name; |
| symbolHandle method_signature; |
| KlassHandle current_klass; |
| resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); |
| KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); |
| resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); |
| } |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| #ifndef PRODUCT |
| |
| void FieldAccessInfo::print() { |
| ResourceMark rm; |
| tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset()); |
| } |
| |
| #endif |
