1 /* 2 * Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_PRIMS_METHODHANDLES_HPP 26 #define SHARE_PRIMS_METHODHANDLES_HPP 27 28 #include "classfile/javaClasses.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "runtime/frame.hpp" 31 #include "runtime/globals.hpp" 32 #include "utilities/macros.hpp" 33 34 #ifdef ZERO 35 # include "entry_zero.hpp" 36 # include "interpreter/interpreter.hpp" 37 #endif 38 39 40 class MacroAssembler; 41 class Label; 42 43 class MethodHandles: AllStatic { 44 // JVM support for MethodHandle, MethodType, and related types 45 // in java.lang.invoke and sun.invoke. 46 // See also javaClasses for layouts java_lang_invoke_Method{Handle,Type,Type::Form}. 47 public: 48 public: 49 static bool enabled() { return _enabled; } 50 static void set_enabled(bool z); 51 52 private: 53 static bool _enabled; 54 55 // Adapters. 56 static MethodHandlesAdapterBlob* _adapter_code; 57 58 // utility functions for reifying names and types 59 static oop field_name_or_null(Symbol* s); 60 static oop field_signature_type_or_null(Symbol* s); 61 62 public: 63 // working with member names 64 static Handle resolve_MemberName(Handle mname, Klass* caller, 65 bool speculative_resolve, TRAPS); // compute vmtarget/vmindex from name/type 66 static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing 67 static oop init_MemberName(Handle mname_h, Handle target_h, TRAPS); // compute vmtarget/vmindex from target 68 static oop init_field_MemberName(Handle mname_h, fieldDescriptor& fd, bool is_setter = false); 69 static oop init_method_MemberName(Handle mname_h, CallInfo& info); 70 static int find_MemberNames(Klass* k, Symbol* name, Symbol* sig, 71 int mflags, Klass* caller, 72 int skip, objArrayHandle results, TRAPS); 73 static Handle resolve_MemberName_type(Handle mname, Klass* caller, TRAPS); 74 75 // bit values for suppress argument to expand_MemberName: 76 enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 }; 77 78 // CallSite support 79 static void add_dependent_nmethod(oop call_site, nmethod* nm); 80 static void remove_dependent_nmethod(oop call_site, nmethod* nm); 81 static void clean_dependency_context(oop call_site); 82 83 static void flush_dependent_nmethods(Handle call_site, Handle target); 84 85 // Generate MethodHandles adapters. 86 static void generate_adapters(); 87 88 // Called from MethodHandlesAdapterGenerator. 89 static address generate_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid); 90 static void generate_method_handle_dispatch(MacroAssembler* _masm, 91 vmIntrinsics::ID iid, 92 Register receiver_reg, 93 Register member_reg, 94 bool for_compiler_entry); 95 96 // Queries 97 static bool is_signature_polymorphic(vmIntrinsics::ID iid) { 98 return (iid >= vmIntrinsics::FIRST_MH_SIG_POLY && 99 iid <= vmIntrinsics::LAST_MH_SIG_POLY); 100 } 101 102 static bool is_signature_polymorphic_method(Method* m) { 103 return is_signature_polymorphic(m->intrinsic_id()); 104 } 105 106 static bool is_signature_polymorphic_intrinsic(vmIntrinsics::ID iid) { 107 assert(is_signature_polymorphic(iid), ""); 108 // Most sig-poly methods are intrinsics which do not require an 109 // appeal to Java for adapter code. 110 return (iid != vmIntrinsics::_invokeGeneric); 111 } 112 113 static bool is_signature_polymorphic_static(vmIntrinsics::ID iid) { 114 assert(is_signature_polymorphic(iid), ""); 115 return (iid >= vmIntrinsics::FIRST_MH_STATIC && 116 iid <= vmIntrinsics::LAST_MH_SIG_POLY); 117 } 118 119 static bool has_member_arg(vmIntrinsics::ID iid) { 120 assert(is_signature_polymorphic(iid), ""); 121 return (iid >= vmIntrinsics::_linkToVirtual && 122 iid <= vmIntrinsics::_linkToInterface); 123 } 124 static bool has_member_arg(Symbol* klass, Symbol* name) { 125 if ((klass == vmSymbols::java_lang_invoke_MethodHandle() || 126 klass == vmSymbols::java_lang_invoke_VarHandle()) && 127 is_signature_polymorphic_name(name)) { 128 vmIntrinsics::ID iid = signature_polymorphic_name_id(name); 129 return has_member_arg(iid); 130 } 131 return false; 132 } 133 134 static Symbol* signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid); 135 static int signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid); 136 137 static vmIntrinsics::ID signature_polymorphic_name_id(Klass* klass, Symbol* name); 138 static vmIntrinsics::ID signature_polymorphic_name_id(Symbol* name); 139 static bool is_signature_polymorphic_name(Symbol* name) { 140 return signature_polymorphic_name_id(name) != vmIntrinsics::_none; 141 } 142 static bool is_method_handle_invoke_name(Klass* klass, Symbol* name); 143 static bool is_signature_polymorphic_name(Klass* klass, Symbol* name) { 144 return signature_polymorphic_name_id(klass, name) != vmIntrinsics::_none; 145 } 146 static bool is_signature_polymorphic_public_name(Klass* klass, Symbol* name); 147 148 static Bytecodes::Code signature_polymorphic_intrinsic_bytecode(vmIntrinsics::ID id); 149 150 public: 151 static Symbol* lookup_signature(oop type_str, bool polymorphic, TRAPS); // use TempNewSymbol 152 static Symbol* lookup_basic_type_signature(Symbol* sig, bool keep_last_arg, TRAPS); // use TempNewSymbol 153 static Symbol* lookup_basic_type_signature(Symbol* sig, TRAPS) { 154 return lookup_basic_type_signature(sig, false, THREAD); 155 } 156 static bool is_basic_type_signature(Symbol* sig); 157 158 static void print_as_basic_type_signature_on(outputStream* st, Symbol* sig); 159 160 // decoding CONSTANT_MethodHandle constants 161 enum { JVM_REF_MIN = JVM_REF_getField, JVM_REF_MAX = JVM_REF_invokeInterface }; 162 static bool ref_kind_is_valid(int ref_kind) { 163 return (ref_kind >= JVM_REF_MIN && ref_kind <= JVM_REF_MAX); 164 } 165 static bool ref_kind_is_field(int ref_kind) { 166 assert(ref_kind_is_valid(ref_kind), ""); 167 return (ref_kind <= JVM_REF_putStatic); 168 } 169 static bool ref_kind_is_getter(int ref_kind) { 170 assert(ref_kind_is_valid(ref_kind), ""); 171 return (ref_kind <= JVM_REF_getStatic); 172 } 173 static bool ref_kind_is_setter(int ref_kind) { 174 return ref_kind_is_field(ref_kind) && !ref_kind_is_getter(ref_kind); 175 } 176 static bool ref_kind_is_method(int ref_kind) { 177 return !ref_kind_is_field(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial); 178 } 179 static bool ref_kind_has_receiver(int ref_kind) { 180 assert(ref_kind_is_valid(ref_kind), ""); 181 return (ref_kind & 1) != 0; 182 } 183 184 static int ref_kind_to_flags(int ref_kind); 185 186 #include CPU_HEADER(methodHandles) 187 188 // Tracing 189 static void trace_method_handle(MacroAssembler* _masm, const char* adaptername) PRODUCT_RETURN; 190 static void trace_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid); 191 }; 192 193 //------------------------------------------------------------------------------ 194 // MethodHandlesAdapterGenerator 195 // 196 class MethodHandlesAdapterGenerator : public StubCodeGenerator { 197 public: 198 MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code, PrintMethodHandleStubs) {} 199 200 void generate(); 201 }; 202 203 #endif // SHARE_PRIMS_METHODHANDLES_HPP