--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/interpreter/linkResolver.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,1000 @@
+/*
+ * 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