1 /*
2 * Copyright (c) 2008, 2017, 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, TRAPS); // compute vmtarget/vmindex from name/type
65 static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing
66 static oop init_MemberName(Handle mname_h, Handle target_h, TRAPS); // compute vmtarget/vmindex from target
67 static oop init_field_MemberName(Handle mname_h, fieldDescriptor& fd, bool is_setter = false);
68 static oop init_method_MemberName(Handle mname_h, CallInfo& info);
69 static int method_ref_kind(Method* m, bool do_dispatch_if_possible = true);
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
82 static void flush_dependent_nmethods(Handle call_site, Handle target);
83
84 // Generate MethodHandles adapters.
85 static void generate_adapters();
86
87 // Called from MethodHandlesAdapterGenerator.
88 static address generate_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid);
89 static void generate_method_handle_dispatch(MacroAssembler* _masm,
90 vmIntrinsics::ID iid,
91 Register receiver_reg,
92 Register member_reg,
93 bool for_compiler_entry);
94
95 // Queries
96 static bool is_signature_polymorphic(vmIntrinsics::ID iid) {
97 return (iid >= vmIntrinsics::FIRST_MH_SIG_POLY &&
98 iid <= vmIntrinsics::LAST_MH_SIG_POLY);
99 }
100
101 static bool is_signature_polymorphic_method(Method* m) {
102 return is_signature_polymorphic(m->intrinsic_id());
103 }
104
105 static bool is_signature_polymorphic_intrinsic(vmIntrinsics::ID iid) {
106 assert(is_signature_polymorphic(iid), "");
107 // Most sig-poly methods are intrinsics which do not require an
108 // appeal to Java for adapter code.
109 return (iid != vmIntrinsics::_invokeGeneric);
110 }
111
112 static bool is_signature_polymorphic_static(vmIntrinsics::ID iid) {
113 assert(is_signature_polymorphic(iid), "");
114 return (iid >= vmIntrinsics::FIRST_MH_STATIC &&
115 iid <= vmIntrinsics::LAST_MH_SIG_POLY);
116 }
117
118 static bool has_member_arg(vmIntrinsics::ID iid) {
119 assert(is_signature_polymorphic(iid), "");
120 return (iid >= vmIntrinsics::_linkToVirtual &&
121 iid <= vmIntrinsics::_linkToInterface);
122 }
123 static bool has_member_arg(Symbol* klass, Symbol* name) {
124 if ((klass == vmSymbols::java_lang_invoke_MethodHandle() ||
125 klass == vmSymbols::java_lang_invoke_VarHandle()) &&
126 is_signature_polymorphic_name(name)) {
127 vmIntrinsics::ID iid = signature_polymorphic_name_id(name);
128 return has_member_arg(iid);
129 }
130 return false;
131 }
132
133 static Symbol* signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid);
134 static int signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid);
135
136 static vmIntrinsics::ID signature_polymorphic_name_id(Klass* klass, Symbol* name);
137 static vmIntrinsics::ID signature_polymorphic_name_id(Symbol* name);
138 static bool is_signature_polymorphic_name(Symbol* name) {
139 return signature_polymorphic_name_id(name) != vmIntrinsics::_none;
140 }
141 static bool is_method_handle_invoke_name(Klass* klass, Symbol* name);
142 static bool is_signature_polymorphic_name(Klass* klass, Symbol* name) {
143 return signature_polymorphic_name_id(klass, name) != vmIntrinsics::_none;
144 }
145
146 static Bytecodes::Code signature_polymorphic_intrinsic_bytecode(vmIntrinsics::ID id);
147
148 static int get_named_constant(int which, Handle name_box, TRAPS);
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 Symbol* lookup_method_type(Symbol* msig, Handle mtype, TRAPS);
159
160 static void print_as_method_type_on(outputStream* st, Symbol* sig) {
161 print_as_basic_type_signature_on(st, sig, true, true);
162 }
163 static void print_as_basic_type_signature_on(outputStream* st, Symbol* sig, bool keep_arrays = false, bool keep_basic_names = false);
164
165 // decoding CONSTANT_MethodHandle constants
166 enum { JVM_REF_MIN = JVM_REF_getField, JVM_REF_MAX = JVM_REF_invokeInterface };
167 static bool ref_kind_is_valid(int ref_kind) {
168 return (ref_kind >= JVM_REF_MIN && ref_kind <= JVM_REF_MAX);
169 }
170 static bool ref_kind_is_field(int ref_kind) {
171 assert(ref_kind_is_valid(ref_kind), "");
172 return (ref_kind <= JVM_REF_putStatic);
173 }
174 static bool ref_kind_is_getter(int ref_kind) {
175 assert(ref_kind_is_valid(ref_kind), "");
176 return (ref_kind <= JVM_REF_getStatic);
177 }
178 static bool ref_kind_is_setter(int ref_kind) {
179 return ref_kind_is_field(ref_kind) && !ref_kind_is_getter(ref_kind);
180 }
181 static bool ref_kind_is_method(int ref_kind) {
182 return !ref_kind_is_field(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial);
183 }
184 static bool ref_kind_has_receiver(int ref_kind) {
185 assert(ref_kind_is_valid(ref_kind), "");
186 return (ref_kind & 1) != 0;
187 }
188 static bool ref_kind_is_static(int ref_kind) {
189 return !ref_kind_has_receiver(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial);
190 }
191 static bool ref_kind_does_dispatch(int ref_kind) {
192 return (ref_kind == JVM_REF_invokeVirtual ||
193 ref_kind == JVM_REF_invokeInterface);
194 }
195
196 static int ref_kind_to_flags(int ref_kind);
197
198 #include CPU_HEADER(methodHandles)
199
200 // Tracing
201 static void trace_method_handle(MacroAssembler* _masm, const char* adaptername) PRODUCT_RETURN;
202 static void trace_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid);
203 };
204
205 //------------------------------------------------------------------------------
206 // MethodHandlesAdapterGenerator
207 //
208 class MethodHandlesAdapterGenerator : public StubCodeGenerator {
209 public:
210 MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code, PrintMethodHandleStubs) {}
211
212 void generate();
213 };
214
215 #endif // SHARE_VM_PRIMS_METHODHANDLES_HPP