1 /*
2 * Copyright (c) 2008, 2018, 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_VM_PRIMS_METHODHANDLES_HPP
26 #define SHARE_VM_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 method_ref_kind(Method* m, bool do_dispatch_if_possible = true);
71 static int find_MemberNames(Klass* k, Symbol* name, Symbol* sig,
72 int mflags, Klass* caller,
73 int skip, objArrayHandle results, TRAPS);
74 static Handle resolve_MemberName_type(Handle mname, Klass* caller, TRAPS);
75
76 // bit values for suppress argument to expand_MemberName:
77 enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 };
78
79 // CallSite support
80 static void add_dependent_nmethod(oop call_site, nmethod* nm);
81 static void remove_dependent_nmethod(oop call_site, nmethod* nm);
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 static int get_named_constant(int which, Handle name_box, TRAPS);
151
152 public:
153 static Symbol* lookup_signature(oop type_str, bool polymorphic, TRAPS); // use TempNewSymbol
154 static Symbol* lookup_basic_type_signature(Symbol* sig, bool keep_last_arg, TRAPS); // use TempNewSymbol
155 static Symbol* lookup_basic_type_signature(Symbol* sig, TRAPS) {
156 return lookup_basic_type_signature(sig, false, THREAD);
157 }
158 static bool is_basic_type_signature(Symbol* sig);
159
160 static Symbol* lookup_method_type(Symbol* msig, Handle mtype, TRAPS);
161
162 static void print_as_method_type_on(outputStream* st, Symbol* sig) {
163 print_as_basic_type_signature_on(st, sig, true, true);
164 }
165 static void print_as_basic_type_signature_on(outputStream* st, Symbol* sig, bool keep_arrays = false, bool keep_basic_names = false);
166
167 // decoding CONSTANT_MethodHandle constants
168 enum { JVM_REF_MIN = JVM_REF_getField, JVM_REF_MAX = JVM_REF_invokeInterface };
169 static bool ref_kind_is_valid(int ref_kind) {
170 return (ref_kind >= JVM_REF_MIN && ref_kind <= JVM_REF_MAX);
171 }
172 static bool ref_kind_is_field(int ref_kind) {
173 assert(ref_kind_is_valid(ref_kind), "");
174 return (ref_kind <= JVM_REF_putStatic);
175 }
176 static bool ref_kind_is_getter(int ref_kind) {
177 assert(ref_kind_is_valid(ref_kind), "");
178 return (ref_kind <= JVM_REF_getStatic);
179 }
180 static bool ref_kind_is_setter(int ref_kind) {
181 return ref_kind_is_field(ref_kind) && !ref_kind_is_getter(ref_kind);
182 }
183 static bool ref_kind_is_method(int ref_kind) {
184 return !ref_kind_is_field(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial);
185 }
186 static bool ref_kind_has_receiver(int ref_kind) {
187 assert(ref_kind_is_valid(ref_kind), "");
188 return (ref_kind & 1) != 0;
189 }
190 static bool ref_kind_is_static(int ref_kind) {
191 return !ref_kind_has_receiver(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial);
192 }
193 static bool ref_kind_does_dispatch(int ref_kind) {
194 return (ref_kind == JVM_REF_invokeVirtual ||
195 ref_kind == JVM_REF_invokeInterface);
196 }
197
198 static int ref_kind_to_flags(int ref_kind);
199
200 #include CPU_HEADER(methodHandles)
201
202 // Tracing
203 static void trace_method_handle(MacroAssembler* _masm, const char* adaptername) PRODUCT_RETURN;
204 static void trace_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid);
205 };
206
207 //------------------------------------------------------------------------------
208 // MethodHandlesAdapterGenerator
209 //
210 class MethodHandlesAdapterGenerator : public StubCodeGenerator {
211 public:
212 MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code, PrintMethodHandleStubs) {}
213
214 void generate();
215 };
216
217 #endif // SHARE_VM_PRIMS_METHODHANDLES_HPP