duke@435: /* drchase@5732: * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. duke@435: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@435: * duke@435: * This code is free software; you can redistribute it and/or modify it duke@435: * under the terms of the GNU General Public License version 2 only, as duke@435: * published by the Free Software Foundation. duke@435: * duke@435: * This code is distributed in the hope that it will be useful, but WITHOUT duke@435: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@435: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@435: * version 2 for more details (a copy is included in the LICENSE file that duke@435: * accompanied this code). duke@435: * duke@435: * You should have received a copy of the GNU General Public License version duke@435: * 2 along with this work; if not, write to the Free Software Foundation, duke@435: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@435: * trims@1907: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA trims@1907: * or visit www.oracle.com if you need additional information or have any trims@1907: * questions. duke@435: * duke@435: */ duke@435: stefank@2314: #ifndef SHARE_VM_INTERPRETER_LINKRESOLVER_HPP stefank@2314: #define SHARE_VM_INTERPRETER_LINKRESOLVER_HPP stefank@2314: coleenp@4037: #include "oops/method.hpp" stefank@2314: #include "utilities/top.hpp" stefank@2314: duke@435: // All the necessary definitions for run-time link resolution. duke@435: drchase@5732: // CallInfo provides all the information gathered for a particular drchase@5732: // linked call site after resolving it. A link is any reference duke@435: // made from within the bytecodes of a method to an object outside of duke@435: // that method. If the info is invalid, the link has not been resolved duke@435: // successfully. duke@435: drchase@5732: class CallInfo VALUE_OBJ_CLASS_SPEC { duke@435: public: drchase@5732: // Ways that a method call might be selected (or not) based on receiver type. drchase@5732: // Note that an invokevirtual instruction might be linked with no_dispatch, drchase@5732: // and an invokeinterface instruction might be linked with any of the three options drchase@5732: enum CallKind { drchase@5732: direct_call, // jump into resolved_method (must be concrete) drchase@5732: vtable_call, // select recv.klass.method_at_vtable(index) drchase@5732: itable_call, // select recv.klass.method_at_itable(resolved_method.holder, index) drchase@5732: unknown_kind = -1 drchase@5732: }; duke@435: private: drchase@5732: KlassHandle _resolved_klass; // static receiver klass, resolved from a symbolic reference duke@435: KlassHandle _selected_klass; // dynamic receiver class (same as static, or subklass) duke@435: methodHandle _resolved_method; // static target method duke@435: methodHandle _selected_method; // dynamic (actual) target method drchase@5732: CallKind _call_kind; // kind of call (static(=bytecode static/special + drchase@5732: // others inferred), vtable, itable) drchase@5732: int _call_index; // vtable or itable index of selected class method (if any) twisti@3969: Handle _resolved_appendix; // extra argument in constant pool (if CPCE::has_appendix) twisti@4133: Handle _resolved_method_type; // MethodType (for invokedynamic and invokehandle call sites) duke@435: twisti@4133: void set_static( KlassHandle resolved_klass, methodHandle resolved_method , TRAPS); drchase@5732: void set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index , TRAPS); twisti@4133: void set_virtual( KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index , TRAPS); twisti@4133: void set_handle( methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS); drchase@5732: void set_common( KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, CallKind kind, int index, TRAPS); duke@435: duke@435: friend class LinkResolver; duke@435: duke@435: public: drchase@5732: CallInfo() { drchase@5732: #ifndef PRODUCT drchase@5732: _call_kind = CallInfo::unknown_kind; drchase@5732: _call_index = Method::garbage_vtable_index; drchase@5732: #endif //PRODUCT drchase@5732: } drchase@5732: drchase@5732: // utility to extract an effective CallInfo from a method and an optional receiver limit drchase@5732: // does not queue the method for compilation drchase@5732: CallInfo(Method* resolved_method, Klass* resolved_klass = NULL); drchase@5732: duke@435: KlassHandle resolved_klass() const { return _resolved_klass; } duke@435: KlassHandle selected_klass() const { return _selected_klass; } duke@435: methodHandle resolved_method() const { return _resolved_method; } duke@435: methodHandle selected_method() const { return _selected_method; } twisti@3969: Handle resolved_appendix() const { return _resolved_appendix; } twisti@4133: Handle resolved_method_type() const { return _resolved_method_type; } duke@435: duke@435: BasicType result_type() const { return selected_method()->result_type(); } drchase@5732: CallKind call_kind() const { return _call_kind; } drchase@5732: int call_index() const { return _call_index; } duke@435: int vtable_index() const { duke@435: // Even for interface calls the vtable index could be non-negative. duke@435: // See CallInfo::set_interface. duke@435: assert(has_vtable_index() || is_statically_bound(), ""); drchase@5732: assert(call_kind() == vtable_call || call_kind() == direct_call, ""); drchase@5732: // The returned value is < 0 if the call is statically bound. drchase@5732: // But, the returned value may be >= 0 even if the kind is direct_call. drchase@5732: // It is up to the caller to decide which way to go. drchase@5732: return _call_index; duke@435: } drchase@5732: int itable_index() const { drchase@5732: assert(call_kind() == itable_call, ""); drchase@5732: // The returned value is always >= 0, a valid itable index. drchase@5732: return _call_index; drchase@5732: } drchase@5732: drchase@5732: // debugging drchase@5732: #ifdef ASSERT drchase@5732: bool has_vtable_index() const { return _call_index >= 0 && _call_kind != CallInfo::itable_call; } drchase@5732: bool is_statically_bound() const { return _call_index == Method::nonvirtual_vtable_index; } drchase@5732: #endif //ASSERT drchase@5732: void verify() PRODUCT_RETURN; drchase@5732: void print() PRODUCT_RETURN; duke@435: }; duke@435: drchase@5732: // Link information for getfield/putfield & getstatic/putstatic bytecodes drchase@5732: // is represented using a fieldDescriptor. duke@435: duke@435: // The LinkResolver is used to resolve constant-pool references at run-time. duke@435: // It does all necessary link-time checks & throws exceptions if necessary. duke@435: duke@435: class LinkResolver: AllStatic { drchase@5732: friend class klassVtable; drchase@5732: friend class klassItable; drchase@5732: duke@435: private: coleenp@2497: static void lookup_method_in_klasses (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); coleenp@2497: static void lookup_instance_method_in_klasses (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); coleenp@2497: static void lookup_method_in_interfaces (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); twisti@3969: static void lookup_polymorphic_method (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, twisti@4133: KlassHandle current_klass, Handle *appendix_result_or_null, Handle *method_type_result, TRAPS); duke@435: duke@435: static void resolve_klass (KlassHandle& result, constantPoolHandle pool, int index, TRAPS); duke@435: coleenp@2497: static void resolve_pool (KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS); duke@435: coleenp@2497: static void resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS); acorn@5897: static void resolve_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, bool require_methodref, TRAPS); duke@435: coleenp@2497: static void linktime_resolve_static_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS); coleenp@2497: static void linktime_resolve_special_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS); coleenp@2497: static void linktime_resolve_virtual_method (methodHandle &resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature,KlassHandle current_klass, bool check_access, TRAPS); coleenp@2497: static void linktime_resolve_interface_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS); duke@435: duke@435: static void runtime_resolve_special_method (CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, KlassHandle current_klass, bool check_access, TRAPS); duke@435: static void runtime_resolve_virtual_method (CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS); duke@435: static void runtime_resolve_interface_method (CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS); duke@435: duke@435: static void check_field_accessability (KlassHandle ref_klass, KlassHandle resolved_klass, KlassHandle sel_klass, fieldDescriptor& fd, TRAPS); duke@435: static void check_method_accessability (KlassHandle ref_klass, KlassHandle resolved_klass, KlassHandle sel_klass, methodHandle sel_method, TRAPS); duke@435: duke@435: public: duke@435: // constant pool resolving duke@435: static void check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS); duke@435: twisti@3969: // static resolving calls (will not run any Java code); used only from Bytecode_invoke::static_target twisti@3969: static void resolve_method_statically(methodHandle& method_result, KlassHandle& klass_result, twisti@3969: Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS); duke@435: duke@435: // runtime/static resolving for fields drchase@5732: static void resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS); drchase@5732: static void resolve_field(fieldDescriptor& result, KlassHandle resolved_klass, Symbol* field_name, Symbol* field_signature, drchase@5732: KlassHandle current_klass, Bytecodes::Code access_kind, bool check_access, bool initialize_class, TRAPS); drchase@5732: drchase@5732: // source of access_kind codes: drchase@5732: static Bytecodes::Code field_access_kind(bool is_static, bool is_put) { drchase@5732: return (is_static drchase@5732: ? (is_put ? Bytecodes::_putstatic : Bytecodes::_getstatic) drchase@5732: : (is_put ? Bytecodes::_putfield : Bytecodes::_getfield )); drchase@5732: } duke@435: duke@435: // runtime resolving: duke@435: // resolved_klass = specified class (i.e., static receiver class) duke@435: // current_klass = sending method holder (i.e., class containing the method containing the call being resolved) coleenp@2497: static void resolve_static_call (CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, bool initialize_klass, TRAPS); coleenp@2497: static void resolve_special_call (CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS); coleenp@2497: static void resolve_virtual_call (CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, bool check_null_and_abstract, TRAPS); coleenp@2497: static void resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, bool check_null_and_abstract, TRAPS); twisti@3969: static void resolve_handle_call (CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, TRAPS); twisti@3969: static void resolve_dynamic_call (CallInfo& result, Handle bootstrap_specifier, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, TRAPS); duke@435: duke@435: // same as above for compile-time resolution; but returns null handle instead of throwing an exception on error duke@435: // also, does not initialize klass (i.e., no side effects) coleenp@2497: static methodHandle resolve_virtual_call_or_null (KlassHandle receiver_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass); coleenp@2497: static methodHandle resolve_interface_call_or_null(KlassHandle receiver_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass); coleenp@2497: static methodHandle resolve_static_call_or_null (KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass); coleenp@2497: static methodHandle resolve_special_call_or_null (KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass); acorn@6080: static int vtable_index_of_interface_method(KlassHandle klass, methodHandle resolved_method); duke@435: duke@435: // same as above for compile-time resolution; returns vtable_index if current_klass if linked coleenp@2497: static int resolve_virtual_vtable_index (KlassHandle receiver_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass); duke@435: duke@435: // static resolving for compiler (does not throw exceptions, returns null handle if unsuccessful) coleenp@2497: static methodHandle linktime_resolve_virtual_method_or_null (KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access); coleenp@2497: static methodHandle linktime_resolve_interface_method_or_null(KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access); duke@435: duke@435: // runtime resolving from constant pool duke@435: static void resolve_invokestatic (CallInfo& result, constantPoolHandle pool, int index, TRAPS); duke@435: static void resolve_invokespecial (CallInfo& result, constantPoolHandle pool, int index, TRAPS); duke@435: static void resolve_invokevirtual (CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS); duke@435: static void resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS); jrose@1161: static void resolve_invokedynamic (CallInfo& result, constantPoolHandle pool, int index, TRAPS); twisti@3969: static void resolve_invokehandle (CallInfo& result, constantPoolHandle pool, int index, TRAPS); duke@435: duke@435: static void resolve_invoke (CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS); duke@435: }; stefank@2314: stefank@2314: #endif // SHARE_VM_INTERPRETER_LINKRESOLVER_HPP