Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/methodHandles.cpp @ 23660:b5f3a471e646
Merge.
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 01 Jun 2016 00:11:44 +0200 |
parents | dd9cc155639c |
children | 719853999215 |
rev | line source |
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710 | 1 /* |
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2 * Copyright (c) 2008, 2014, Oracle and/or its affiliates. All rights reserved. |
710 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
710 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/symbolTable.hpp" | |
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27 #include "compiler/compileBroker.hpp" |
1972 | 28 #include "interpreter/interpreter.hpp" |
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29 #include "interpreter/oopMapCache.hpp" |
1972 | 30 #include "memory/allocation.inline.hpp" |
31 #include "memory/oopFactory.hpp" | |
32 #include "prims/methodHandles.hpp" | |
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33 #include "prims/jvmtiRedefineClassesTrace.hpp" |
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34 #include "runtime/compilationPolicy.hpp" |
1972 | 35 #include "runtime/javaCalls.hpp" |
36 #include "runtime/reflection.hpp" | |
37 #include "runtime/signature.hpp" | |
38 #include "runtime/stubRoutines.hpp" | |
39 | |
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40 |
710 | 41 /* |
42 * JSR 292 reference implementation: method handles | |
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43 * The JDK 7 reference implementation represented method handle |
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44 * combinations as chains. Each link in the chain had a "vmentry" |
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45 * field which pointed at a bit of assembly code which performed |
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46 * one transformation before dispatching to the next link in the chain. |
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47 * |
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48 * The current reference implementation pushes almost all code generation |
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49 * responsibility to (trusted) Java code. A method handle contains a |
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50 * pointer to its "LambdaForm", which embodies all details of the method |
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51 * handle's behavior. The LambdaForm is a normal Java object, managed |
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52 * by a runtime coded in Java. |
710 | 53 */ |
54 | |
55 bool MethodHandles::_enabled = false; // set true after successful native linkage | |
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56 MethodHandlesAdapterBlob* MethodHandles::_adapter_code = NULL; |
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57 |
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58 //------------------------------------------------------------------------------ |
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59 // MethodHandles::generate_adapters |
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60 // |
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61 void MethodHandles::generate_adapters() { |
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62 if (!EnableInvokeDynamic || SystemDictionary::MethodHandle_klass() == NULL) return; |
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63 |
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64 assert(_adapter_code == NULL, "generate only once"); |
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65 |
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66 ResourceMark rm; |
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67 TraceTime timer("MethodHandles adapters generation", TraceStartupTime); |
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68 _adapter_code = MethodHandlesAdapterBlob::create(adapter_code_size); |
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69 if (_adapter_code == NULL) |
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70 vm_exit_out_of_memory(adapter_code_size, OOM_MALLOC_ERROR, |
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71 "CodeCache: no room for MethodHandles adapters"); |
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72 { |
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73 CodeBuffer code(_adapter_code); |
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74 MethodHandlesAdapterGenerator g(&code); |
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75 g.generate(); |
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76 code.log_section_sizes("MethodHandlesAdapterBlob"); |
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77 } |
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78 } |
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79 |
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80 //------------------------------------------------------------------------------ |
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81 // MethodHandlesAdapterGenerator::generate |
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82 // |
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83 void MethodHandlesAdapterGenerator::generate() { |
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84 // Generate generic method handle adapters. |
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85 // Generate interpreter entries |
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86 for (Interpreter::MethodKind mk = Interpreter::method_handle_invoke_FIRST; |
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87 mk <= Interpreter::method_handle_invoke_LAST; |
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88 mk = Interpreter::MethodKind(1 + (int)mk)) { |
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89 vmIntrinsics::ID iid = Interpreter::method_handle_intrinsic(mk); |
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90 StubCodeMark mark(this, "MethodHandle::interpreter_entry", vmIntrinsics::name_at(iid)); |
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91 address entry = MethodHandles::generate_method_handle_interpreter_entry(_masm, iid); |
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92 if (entry != NULL) { |
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93 Interpreter::set_entry_for_kind(mk, entry); |
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94 } |
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95 // If the entry is not set, it will throw AbstractMethodError. |
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96 } |
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97 } |
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98 |
710 | 99 void MethodHandles::set_enabled(bool z) { |
100 if (_enabled != z) { | |
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101 guarantee(z && EnableInvokeDynamic, "can only enable once, and only if -XX:+EnableInvokeDynamic"); |
710 | 102 _enabled = z; |
103 } | |
104 } | |
105 | |
106 // MemberName support | |
107 | |
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108 // import java_lang_invoke_MemberName.* |
710 | 109 enum { |
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110 IS_METHOD = java_lang_invoke_MemberName::MN_IS_METHOD, |
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111 IS_CONSTRUCTOR = java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR, |
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112 IS_FIELD = java_lang_invoke_MemberName::MN_IS_FIELD, |
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113 IS_TYPE = java_lang_invoke_MemberName::MN_IS_TYPE, |
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114 CALLER_SENSITIVE = java_lang_invoke_MemberName::MN_CALLER_SENSITIVE, |
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115 REFERENCE_KIND_SHIFT = java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT, |
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116 REFERENCE_KIND_MASK = java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK, |
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117 SEARCH_SUPERCLASSES = java_lang_invoke_MemberName::MN_SEARCH_SUPERCLASSES, |
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118 SEARCH_INTERFACES = java_lang_invoke_MemberName::MN_SEARCH_INTERFACES, |
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119 ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE |
710 | 120 }; |
121 | |
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122 Handle MethodHandles::new_MemberName(TRAPS) { |
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123 Handle empty; |
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124 instanceKlassHandle k(THREAD, SystemDictionary::MemberName_klass()); |
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125 if (!k->is_initialized()) k->initialize(CHECK_(empty)); |
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126 return Handle(THREAD, k->allocate_instance(THREAD)); |
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127 } |
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128 |
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129 oop MethodHandles::init_MemberName(Handle mname, Handle target) { |
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130 // This method is used from java.lang.invoke.MemberName constructors. |
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131 // It fills in the new MemberName from a java.lang.reflect.Member. |
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132 Thread* thread = Thread::current(); |
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133 oop target_oop = target(); |
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134 Klass* target_klass = target_oop->klass(); |
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135 if (target_klass == SystemDictionary::reflect_Field_klass()) { |
710 | 136 oop clazz = java_lang_reflect_Field::clazz(target_oop); // fd.field_holder() |
137 int slot = java_lang_reflect_Field::slot(target_oop); // fd.index() | |
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138 KlassHandle k(thread, java_lang_Class::as_Klass(clazz)); |
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139 if (!k.is_null() && k->oop_is_instance()) { |
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140 fieldDescriptor fd(InstanceKlass::cast(k()), slot); |
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141 oop mname2 = init_field_MemberName(mname, fd); |
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142 if (mname2 != NULL) { |
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143 // Since we have the reified name and type handy, add them to the result. |
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144 if (java_lang_invoke_MemberName::name(mname2) == NULL) |
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145 java_lang_invoke_MemberName::set_name(mname2, java_lang_reflect_Field::name(target_oop)); |
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146 if (java_lang_invoke_MemberName::type(mname2) == NULL) |
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147 java_lang_invoke_MemberName::set_type(mname2, java_lang_reflect_Field::type(target_oop)); |
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148 } |
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149 return mname2; |
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150 } |
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151 } else if (target_klass == SystemDictionary::reflect_Method_klass()) { |
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152 oop clazz = java_lang_reflect_Method::clazz(target_oop); |
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153 int slot = java_lang_reflect_Method::slot(target_oop); |
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154 KlassHandle k(thread, java_lang_Class::as_Klass(clazz)); |
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155 if (!k.is_null() && k->oop_is_instance()) { |
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156 Method* m = InstanceKlass::cast(k())->method_with_idnum(slot); |
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157 if (m == NULL || is_signature_polymorphic(m->intrinsic_id())) |
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158 return NULL; // do not resolve unless there is a concrete signature |
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159 CallInfo info(m, k()); |
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160 return init_method_MemberName(mname, info); |
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161 } |
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162 } else if (target_klass == SystemDictionary::reflect_Constructor_klass()) { |
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163 oop clazz = java_lang_reflect_Constructor::clazz(target_oop); |
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164 int slot = java_lang_reflect_Constructor::slot(target_oop); |
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165 KlassHandle k(thread, java_lang_Class::as_Klass(clazz)); |
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166 if (!k.is_null() && k->oop_is_instance()) { |
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167 Method* m = InstanceKlass::cast(k())->method_with_idnum(slot); |
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168 if (m == NULL) return NULL; |
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169 CallInfo info(m, k()); |
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170 return init_method_MemberName(mname, info); |
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171 } |
710 | 172 } |
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173 return NULL; |
710 | 174 } |
175 | |
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176 oop MethodHandles::init_method_MemberName(Handle mname, CallInfo& info) { |
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177 assert(info.resolved_appendix().is_null(), "only normal methods here"); |
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178 methodHandle m = info.resolved_method(); |
14239 | 179 KlassHandle m_klass = m->method_holder(); |
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180 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); |
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181 int vmindex = Method::invalid_vtable_index; |
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182 |
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183 switch (info.call_kind()) { |
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184 case CallInfo::itable_call: |
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185 vmindex = info.itable_index(); |
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186 // More importantly, the itable index only works with the method holder. |
14239 | 187 assert(m_klass->verify_itable_index(vmindex), ""); |
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188 flags |= IS_METHOD | (JVM_REF_invokeInterface << REFERENCE_KIND_SHIFT); |
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189 if (TraceInvokeDynamic) { |
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190 ResourceMark rm; |
14239 | 191 tty->print_cr("memberName: invokeinterface method_holder::method: %s, itableindex: %d, access_flags:", |
192 Method::name_and_sig_as_C_string(m->method_holder(), m->name(), m->signature()), | |
193 vmindex); | |
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194 m->access_flags().print_on(tty); |
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195 if (!m->is_abstract()) { |
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196 tty->print("default"); |
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197 } |
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198 tty->cr(); |
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199 } |
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200 break; |
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201 |
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202 case CallInfo::vtable_call: |
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203 vmindex = info.vtable_index(); |
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204 flags |= IS_METHOD | (JVM_REF_invokeVirtual << REFERENCE_KIND_SHIFT); |
14239 | 205 assert(info.resolved_klass()->is_subtype_of(m_klass()), "virtual call must be type-safe"); |
206 if (m_klass->is_interface()) { | |
207 // This is a vtable call to an interface method (abstract "miranda method" or default method). | |
208 // The vtable index is meaningless without a class (not interface) receiver type, so get one. | |
209 // (LinkResolver should help us figure this out.) | |
210 KlassHandle m_klass_non_interface = info.resolved_klass(); | |
211 if (m_klass_non_interface->is_interface()) { | |
212 m_klass_non_interface = SystemDictionary::Object_klass(); | |
213 #ifdef ASSERT | |
214 { ResourceMark rm; | |
215 Method* m2 = m_klass_non_interface->vtable()->method_at(vmindex); | |
216 assert(m->name() == m2->name() && m->signature() == m2->signature(), | |
217 err_msg("at %d, %s != %s", vmindex, | |
218 m->name_and_sig_as_C_string(), m2->name_and_sig_as_C_string())); | |
219 } | |
220 #endif //ASSERT | |
221 } | |
222 if (!m->is_public()) { | |
223 assert(m->is_public(), "virtual call must be to public interface method"); | |
224 return NULL; // elicit an error later in product build | |
225 } | |
226 assert(info.resolved_klass()->is_subtype_of(m_klass_non_interface()), "virtual call must be type-safe"); | |
227 m_klass = m_klass_non_interface; | |
228 } | |
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229 if (TraceInvokeDynamic) { |
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230 ResourceMark rm; |
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231 tty->print_cr("memberName: invokevirtual method_holder::method: %s, receiver: %s, vtableindex: %d, access_flags:", |
14239 | 232 Method::name_and_sig_as_C_string(m->method_holder(), m->name(), m->signature()), |
233 m_klass->internal_name(), vmindex); | |
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234 m->access_flags().print_on(tty); |
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235 if (m->is_default_method()) { |
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236 tty->print("default"); |
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237 } |
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238 tty->cr(); |
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239 } |
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240 break; |
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241 |
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242 case CallInfo::direct_call: |
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243 vmindex = Method::nonvirtual_vtable_index; |
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244 if (m->is_static()) { |
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245 flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT); |
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246 } else if (m->is_initializer()) { |
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247 flags |= IS_CONSTRUCTOR | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT); |
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248 } else { |
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249 flags |= IS_METHOD | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT); |
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250 } |
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251 break; |
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252 |
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253 default: assert(false, "bad CallInfo"); return NULL; |
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254 } |
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255 |
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256 // @CallerSensitive annotation detected |
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257 if (m->caller_sensitive()) { |
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258 flags |= CALLER_SENSITIVE; |
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259 } |
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260 |
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261 oop mname_oop = mname(); |
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262 java_lang_invoke_MemberName::set_flags( mname_oop, flags); |
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263 java_lang_invoke_MemberName::set_vmtarget(mname_oop, m()); |
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264 java_lang_invoke_MemberName::set_vmindex( mname_oop, vmindex); // vtable/itable index |
14239 | 265 java_lang_invoke_MemberName::set_clazz( mname_oop, m_klass->java_mirror()); |
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266 // Note: name and type can be lazily computed by resolve_MemberName, |
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267 // if Java code needs them as resolved String and MethodType objects. |
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268 // The clazz must be eagerly stored, because it provides a GC |
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269 // root to help keep alive the Method*. |
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270 // If relevant, the vtable or itable value is stored as vmindex. |
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271 // This is done eagerly, since it is readily available without |
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272 // constructing any new objects. |
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273 // TO DO: maybe intern mname_oop |
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274 if (m->method_holder()->add_member_name(mname)) { |
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275 return mname(); |
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276 } else { |
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277 // Redefinition caused this to fail. Return NULL (and an exception?) |
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278 return NULL; |
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279 } |
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280 } |
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281 |
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282 oop MethodHandles::init_field_MemberName(Handle mname, fieldDescriptor& fd, bool is_setter) { |
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283 int flags = (jushort)( fd.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS ); |
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284 flags |= IS_FIELD | ((fd.is_static() ? JVM_REF_getStatic : JVM_REF_getField) << REFERENCE_KIND_SHIFT); |
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285 if (is_setter) flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT); |
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286 Metadata* vmtarget = fd.field_holder(); |
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287 int vmindex = fd.offset(); // determines the field uniquely when combined with static bit |
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288 oop mname_oop = mname(); |
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289 java_lang_invoke_MemberName::set_flags(mname_oop, flags); |
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290 java_lang_invoke_MemberName::set_vmtarget(mname_oop, vmtarget); |
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291 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); |
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292 java_lang_invoke_MemberName::set_clazz(mname_oop, fd.field_holder()->java_mirror()); |
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293 oop type = field_signature_type_or_null(fd.signature()); |
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294 oop name = field_name_or_null(fd.name()); |
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295 if (name != NULL) |
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296 java_lang_invoke_MemberName::set_name(mname_oop, name); |
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297 if (type != NULL) |
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298 java_lang_invoke_MemberName::set_type(mname_oop, type); |
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299 // Note: name and type can be lazily computed by resolve_MemberName, |
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300 // if Java code needs them as resolved String and Class objects. |
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301 // Note that the incoming type oop might be pre-resolved (non-null). |
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302 // The base clazz and field offset (vmindex) must be eagerly stored, |
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303 // because they unambiguously identify the field. |
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304 // Although the fieldDescriptor::_index would also identify the field, |
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305 // we do not use it, because it is harder to decode. |
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306 // TO DO: maybe intern mname_oop |
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307 return mname(); |
710 | 308 } |
309 | |
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310 // JVM 2.9 Special Methods: |
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311 // A method is signature polymorphic if and only if all of the following conditions hold : |
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312 // * It is declared in the java.lang.invoke.MethodHandle class. |
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313 // * It has a single formal parameter of type Object[]. |
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314 // * It has a return type of Object. |
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315 // * It has the ACC_VARARGS and ACC_NATIVE flags set. |
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316 bool MethodHandles::is_method_handle_invoke_name(Klass* klass, Symbol* name) { |
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317 if (klass == NULL) |
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318 return false; |
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319 // The following test will fail spuriously during bootstrap of MethodHandle itself: |
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320 // if (klass != SystemDictionary::MethodHandle_klass()) |
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321 // Test the name instead: |
6983 | 322 if (klass->name() != vmSymbols::java_lang_invoke_MethodHandle()) |
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323 return false; |
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324 Symbol* poly_sig = vmSymbols::object_array_object_signature(); |
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325 Method* m = InstanceKlass::cast(klass)->find_method(name, poly_sig); |
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326 if (m == NULL) return false; |
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327 int required = JVM_ACC_NATIVE | JVM_ACC_VARARGS; |
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328 int flags = m->access_flags().as_int(); |
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329 return (flags & required) == required; |
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330 } |
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331 |
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332 |
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333 Symbol* MethodHandles::signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid) { |
10684 | 334 assert(is_signature_polymorphic_intrinsic(iid), err_msg("%d %s", iid, vmIntrinsics::name_at(iid))); |
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335 switch (iid) { |
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336 case vmIntrinsics::_invokeBasic: return vmSymbols::invokeBasic_name(); |
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337 case vmIntrinsics::_linkToVirtual: return vmSymbols::linkToVirtual_name(); |
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338 case vmIntrinsics::_linkToStatic: return vmSymbols::linkToStatic_name(); |
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339 case vmIntrinsics::_linkToSpecial: return vmSymbols::linkToSpecial_name(); |
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340 case vmIntrinsics::_linkToInterface: return vmSymbols::linkToInterface_name(); |
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341 } |
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342 fatal(err_msg("unexpected intrinsic id: %d %s", iid, vmIntrinsics::name_at(iid))); |
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343 return 0; |
710 | 344 } |
345 | |
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346 int MethodHandles::signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid) { |
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347 switch (iid) { |
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348 case vmIntrinsics::_invokeBasic: return 0; |
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349 case vmIntrinsics::_linkToVirtual: return JVM_REF_invokeVirtual; |
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350 case vmIntrinsics::_linkToStatic: return JVM_REF_invokeStatic; |
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351 case vmIntrinsics::_linkToSpecial: return JVM_REF_invokeSpecial; |
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352 case vmIntrinsics::_linkToInterface: return JVM_REF_invokeInterface; |
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353 } |
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354 fatal(err_msg("unexpected intrinsic id: %d %s", iid, vmIntrinsics::name_at(iid))); |
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355 return 0; |
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356 } |
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357 |
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358 vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Symbol* name) { |
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359 vmSymbols::SID name_id = vmSymbols::find_sid(name); |
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360 switch (name_id) { |
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361 // The ID _invokeGeneric stands for all non-static signature-polymorphic methods, except built-ins. |
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362 case vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name): return vmIntrinsics::_invokeGeneric; |
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363 // The only built-in non-static signature-polymorphic method is MethodHandle.invokeBasic: |
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364 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeBasic_name): return vmIntrinsics::_invokeBasic; |
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365 |
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366 // There is one static signature-polymorphic method for each JVM invocation mode. |
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367 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToVirtual_name): return vmIntrinsics::_linkToVirtual; |
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368 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToStatic_name): return vmIntrinsics::_linkToStatic; |
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369 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToSpecial_name): return vmIntrinsics::_linkToSpecial; |
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370 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToInterface_name): return vmIntrinsics::_linkToInterface; |
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371 } |
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372 |
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373 // Cover the case of invokeExact and any future variants of invokeFoo. |
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374 Klass* mh_klass = SystemDictionary::well_known_klass( |
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375 SystemDictionary::WK_KLASS_ENUM_NAME(MethodHandle_klass) ); |
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376 if (mh_klass != NULL && is_method_handle_invoke_name(mh_klass, name)) |
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377 return vmIntrinsics::_invokeGeneric; |
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378 |
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379 // Note: The pseudo-intrinsic _compiledLambdaForm is never linked against. |
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380 // Instead it is used to mark lambda forms bound to invokehandle or invokedynamic. |
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381 return vmIntrinsics::_none; |
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382 } |
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383 |
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384 vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Klass* klass, Symbol* name) { |
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385 if (klass != NULL && |
6983 | 386 klass->name() == vmSymbols::java_lang_invoke_MethodHandle()) { |
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387 vmIntrinsics::ID iid = signature_polymorphic_name_id(name); |
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388 if (iid != vmIntrinsics::_none) |
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389 return iid; |
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390 if (is_method_handle_invoke_name(klass, name)) |
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391 return vmIntrinsics::_invokeGeneric; |
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392 } |
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393 return vmIntrinsics::_none; |
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394 } |
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395 |
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396 |
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397 // convert the external string or reflective type to an internal signature |
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398 Symbol* MethodHandles::lookup_signature(oop type_str, bool intern_if_not_found, TRAPS) { |
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399 if (java_lang_invoke_MethodType::is_instance(type_str)) { |
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400 return java_lang_invoke_MethodType::as_signature(type_str, intern_if_not_found, CHECK_NULL); |
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401 } else if (java_lang_Class::is_instance(type_str)) { |
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402 return java_lang_Class::as_signature(type_str, false, CHECK_NULL); |
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403 } else if (java_lang_String::is_instance(type_str)) { |
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404 if (intern_if_not_found) { |
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405 return java_lang_String::as_symbol(type_str, CHECK_NULL); |
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406 } else { |
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407 return java_lang_String::as_symbol_or_null(type_str); |
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408 } |
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409 } else { |
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410 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized type", NULL); |
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411 } |
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412 } |
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413 |
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414 static const char OBJ_SIG[] = "Ljava/lang/Object;"; |
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415 enum { OBJ_SIG_LEN = 18 }; |
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416 |
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417 bool MethodHandles::is_basic_type_signature(Symbol* sig) { |
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418 assert(vmSymbols::object_signature()->utf8_length() == (int)OBJ_SIG_LEN, ""); |
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419 assert(vmSymbols::object_signature()->equals(OBJ_SIG), ""); |
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420 const int len = sig->utf8_length(); |
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421 for (int i = 0; i < len; i++) { |
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422 switch (sig->byte_at(i)) { |
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423 case 'L': |
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424 // only java/lang/Object is valid here |
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425 if (sig->index_of_at(i, OBJ_SIG, OBJ_SIG_LEN) != i) |
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426 return false; |
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427 i += OBJ_SIG_LEN-1; //-1 because of i++ in loop |
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428 continue; |
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429 case '(': case ')': case 'V': |
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430 case 'I': case 'J': case 'F': case 'D': |
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431 continue; |
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432 //case '[': |
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433 //case 'Z': case 'B': case 'C': case 'S': |
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434 default: |
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435 return false; |
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436 } |
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437 } |
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438 return true; |
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439 } |
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440 |
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441 Symbol* MethodHandles::lookup_basic_type_signature(Symbol* sig, bool keep_last_arg, TRAPS) { |
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442 Symbol* bsig = NULL; |
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443 if (sig == NULL) { |
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444 return sig; |
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445 } else if (is_basic_type_signature(sig)) { |
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446 sig->increment_refcount(); |
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447 return sig; // that was easy |
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448 } else if (sig->byte_at(0) != '(') { |
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449 BasicType bt = char2type(sig->byte_at(0)); |
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450 if (is_subword_type(bt)) { |
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451 bsig = vmSymbols::int_signature(); |
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452 } else { |
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453 assert(bt == T_OBJECT || bt == T_ARRAY, "is_basic_type_signature was false"); |
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454 bsig = vmSymbols::object_signature(); |
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455 } |
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456 } else { |
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457 ResourceMark rm; |
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458 stringStream buffer(128); |
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459 buffer.put('('); |
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460 int arg_pos = 0, keep_arg_pos = -1; |
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461 if (keep_last_arg) |
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462 keep_arg_pos = ArgumentCount(sig).size() - 1; |
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463 for (SignatureStream ss(sig); !ss.is_done(); ss.next()) { |
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464 BasicType bt = ss.type(); |
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465 size_t this_arg_pos = buffer.size(); |
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466 if (ss.at_return_type()) { |
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467 buffer.put(')'); |
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468 } |
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469 if (arg_pos == keep_arg_pos) { |
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470 buffer.write((char*) ss.raw_bytes(), |
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471 (int) ss.raw_length()); |
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472 } else if (bt == T_OBJECT || bt == T_ARRAY) { |
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473 buffer.write(OBJ_SIG, OBJ_SIG_LEN); |
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474 } else { |
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475 if (is_subword_type(bt)) |
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476 bt = T_INT; |
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|
477 buffer.put(type2char(bt)); |
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|
478 } |
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479 arg_pos++; |
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480 } |
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481 const char* sigstr = buffer.base(); |
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482 int siglen = (int) buffer.size(); |
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483 bsig = SymbolTable::new_symbol(sigstr, siglen, THREAD); |
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484 } |
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485 assert(is_basic_type_signature(bsig) || |
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486 // detune assert in case the injected argument is not a basic type: |
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487 keep_last_arg, ""); |
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488 return bsig; |
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|
489 } |
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490 |
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491 void MethodHandles::print_as_basic_type_signature_on(outputStream* st, |
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492 Symbol* sig, |
1d7922586cf6
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493 bool keep_arrays, |
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494 bool keep_basic_names) { |
1d7922586cf6
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|
495 st = st ? st : tty; |
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|
496 int len = sig->utf8_length(); |
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497 int array = 0; |
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|
498 bool prev_type = false; |
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|
499 for (int i = 0; i < len; i++) { |
1d7922586cf6
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500 char ch = sig->byte_at(i); |
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501 switch (ch) { |
1d7922586cf6
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|
502 case '(': case ')': |
1d7922586cf6
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twisti
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diff
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|
503 prev_type = false; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
504 st->put(ch); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
505 continue; |
1d7922586cf6
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diff
changeset
|
506 case '[': |
1d7922586cf6
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|
507 if (!keep_basic_names && keep_arrays) |
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twisti
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|
508 st->put(ch); |
1d7922586cf6
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twisti
parents:
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diff
changeset
|
509 array++; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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changeset
|
510 continue; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6224
diff
changeset
|
511 case 'L': |
1d7922586cf6
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twisti
parents:
6224
diff
changeset
|
512 { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
513 if (prev_type) st->put(','); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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changeset
|
514 int start = i+1, slash = start; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
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|
515 while (++i < len && (ch = sig->byte_at(i)) != ';') { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
516 if (ch == '/' || ch == '.' || ch == '$') slash = i+1; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
517 } |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
518 if (slash < i) start = slash; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
519 if (!keep_basic_names) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
changeset
|
520 st->put('L'); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
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|
521 } else { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
522 for (int j = start; j < i; j++) |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
523 st->put(sig->byte_at(j)); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
changeset
|
524 prev_type = true; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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6224
diff
changeset
|
525 } |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
6224
diff
changeset
|
526 break; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
6224
diff
changeset
|
527 } |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
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|
528 default: |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
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|
529 { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
530 if (array && char2type(ch) != T_ILLEGAL && !keep_arrays) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
531 ch = '['; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6224
diff
changeset
|
532 array = 0; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6224
diff
changeset
|
533 } |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
changeset
|
534 if (prev_type) st->put(','); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
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|
535 const char* n = NULL; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
536 if (keep_basic_names) |
1d7922586cf6
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changeset
|
537 n = type2name(char2type(ch)); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
538 if (n == NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
539 // unknown letter, or we don't want to know its name |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
540 st->put(ch); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
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|
541 } else { |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
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|
542 st->print("%s", n); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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|
543 prev_type = true; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
544 } |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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|
545 break; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
546 } |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
547 } |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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|
548 // Switch break goes here to take care of array suffix: |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
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|
549 if (prev_type) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
550 while (array > 0) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
551 st->print("[]"); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6224
diff
changeset
|
552 --array; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6224
diff
changeset
|
553 } |
1d7922586cf6
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554 } |
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555 array = 0; |
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556 } |
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557 } |
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558 |
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559 |
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560 |
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561 static oop object_java_mirror() { |
6983 | 562 return SystemDictionary::Object_klass()->java_mirror(); |
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563 } |
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564 |
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565 oop MethodHandles::field_name_or_null(Symbol* s) { |
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566 if (s == NULL) return NULL; |
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567 return StringTable::lookup(s); |
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568 } |
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569 |
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570 oop MethodHandles::field_signature_type_or_null(Symbol* s) { |
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571 if (s == NULL) return NULL; |
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572 BasicType bt = FieldType::basic_type(s); |
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573 if (is_java_primitive(bt)) { |
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574 assert(s->utf8_length() == 1, ""); |
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575 return java_lang_Class::primitive_mirror(bt); |
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576 } |
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577 // Here are some more short cuts for common types. |
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578 // They are optional, since reference types can be resolved lazily. |
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579 if (bt == T_OBJECT) { |
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580 if (s == vmSymbols::object_signature()) { |
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581 return object_java_mirror(); |
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582 } else if (s == vmSymbols::class_signature()) { |
6983 | 583 return SystemDictionary::Class_klass()->java_mirror(); |
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584 } else if (s == vmSymbols::string_signature()) { |
6983 | 585 return SystemDictionary::String_klass()->java_mirror(); |
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586 } |
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587 } |
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588 return NULL; |
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589 } |
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590 |
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591 |
710 | 592 // An unresolved member name is a mere symbolic reference. |
593 // Resolving it plants a vmtarget/vmindex in it, | |
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594 // which refers directly to JVM internals. |
14239 | 595 Handle MethodHandles::resolve_MemberName(Handle mname, KlassHandle caller, TRAPS) { |
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596 Handle empty; |
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597 assert(java_lang_invoke_MemberName::is_instance(mname()), ""); |
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598 |
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599 if (java_lang_invoke_MemberName::vmtarget(mname()) != NULL) { |
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600 // Already resolved. |
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601 DEBUG_ONLY(int vmindex = java_lang_invoke_MemberName::vmindex(mname())); |
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602 assert(vmindex >= Method::nonvirtual_vtable_index, ""); |
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603 return mname; |
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604 } |
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605 |
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606 Handle defc_oop(THREAD, java_lang_invoke_MemberName::clazz(mname())); |
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607 Handle name_str(THREAD, java_lang_invoke_MemberName::name( mname())); |
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608 Handle type_str(THREAD, java_lang_invoke_MemberName::type( mname())); |
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609 int flags = java_lang_invoke_MemberName::flags(mname()); |
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610 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; |
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611 if (!ref_kind_is_valid(ref_kind)) { |
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612 THROW_MSG_(vmSymbols::java_lang_InternalError(), "obsolete MemberName format", empty); |
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613 } |
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614 |
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615 DEBUG_ONLY(int old_vmindex); |
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616 assert((old_vmindex = java_lang_invoke_MemberName::vmindex(mname())) == 0, "clean input"); |
710 | 617 |
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618 if (defc_oop.is_null() || name_str.is_null() || type_str.is_null()) { |
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619 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "nothing to resolve", empty); |
710 | 620 } |
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621 |
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622 instanceKlassHandle defc; |
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623 { |
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624 Klass* defc_klass = java_lang_Class::as_Klass(defc_oop()); |
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625 if (defc_klass == NULL) return empty; // a primitive; no resolution possible |
6983 | 626 if (!defc_klass->oop_is_instance()) { |
627 if (!defc_klass->oop_is_array()) return empty; | |
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628 defc_klass = SystemDictionary::Object_klass(); |
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629 } |
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630 defc = instanceKlassHandle(THREAD, defc_klass); |
710 | 631 } |
632 if (defc.is_null()) { | |
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633 THROW_MSG_(vmSymbols::java_lang_InternalError(), "primitive class", empty); |
710 | 634 } |
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635 defc->link_class(CHECK_(empty)); // possible safepoint |
710 | 636 |
637 // convert the external string name to an internal symbol | |
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638 TempNewSymbol name = java_lang_String::as_symbol_or_null(name_str()); |
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639 if (name == NULL) return empty; // no such name |
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640 if (name == vmSymbols::class_initializer_name()) |
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641 return empty; // illegal name |
710 | 642 |
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643 vmIntrinsics::ID mh_invoke_id = vmIntrinsics::_none; |
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644 if ((flags & ALL_KINDS) == IS_METHOD && |
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645 (defc() == SystemDictionary::MethodHandle_klass()) && |
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646 (ref_kind == JVM_REF_invokeVirtual || |
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647 ref_kind == JVM_REF_invokeSpecial || |
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648 // static invocation mode is required for _linkToVirtual, etc.: |
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649 ref_kind == JVM_REF_invokeStatic)) { |
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650 vmIntrinsics::ID iid = signature_polymorphic_name_id(name); |
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651 if (iid != vmIntrinsics::_none && |
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652 ((ref_kind == JVM_REF_invokeStatic) == is_signature_polymorphic_static(iid))) { |
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653 // Virtual methods invoke and invokeExact, plus internal invokers like _invokeBasic. |
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654 // For a static reference it could an internal linkage routine like _linkToVirtual, etc. |
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655 mh_invoke_id = iid; |
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656 } |
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657 } |
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658 |
710 | 659 // convert the external string or reflective type to an internal signature |
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660 TempNewSymbol type = lookup_signature(type_str(), (mh_invoke_id != vmIntrinsics::_none), CHECK_(empty)); |
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661 if (type == NULL) return empty; // no such signature exists in the VM |
710 | 662 |
663 // Time to do the lookup. | |
664 switch (flags & ALL_KINDS) { | |
665 case IS_METHOD: | |
666 { | |
667 CallInfo result; | |
668 { | |
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669 assert(!HAS_PENDING_EXCEPTION, ""); |
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670 if (ref_kind == JVM_REF_invokeStatic) { |
710 | 671 LinkResolver::resolve_static_call(result, |
14239 | 672 defc, name, type, caller, caller.not_null(), false, THREAD); |
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673 } else if (ref_kind == JVM_REF_invokeInterface) { |
710 | 674 LinkResolver::resolve_interface_call(result, Handle(), defc, |
14239 | 675 defc, name, type, caller, caller.not_null(), false, THREAD); |
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676 } else if (mh_invoke_id != vmIntrinsics::_none) { |
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677 assert(!is_signature_polymorphic_static(mh_invoke_id), ""); |
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678 LinkResolver::resolve_handle_call(result, |
14239 | 679 defc, name, type, caller, THREAD); |
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680 } else if (ref_kind == JVM_REF_invokeSpecial) { |
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681 LinkResolver::resolve_special_call(result, |
14239 | 682 defc, name, type, caller, caller.not_null(), THREAD); |
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683 } else if (ref_kind == JVM_REF_invokeVirtual) { |
710 | 684 LinkResolver::resolve_virtual_call(result, Handle(), defc, |
14239 | 685 defc, name, type, caller, caller.not_null(), false, THREAD); |
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686 } else { |
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687 assert(false, err_msg("ref_kind=%d", ref_kind)); |
710 | 688 } |
689 if (HAS_PENDING_EXCEPTION) { | |
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690 return empty; |
710 | 691 } |
692 } | |
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693 if (result.resolved_appendix().not_null()) { |
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694 // The resolved MemberName must not be accompanied by an appendix argument, |
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695 // since there is no way to bind this value into the MemberName. |
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696 // Caller is responsible to prevent this from happening. |
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697 THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty); |
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698 } |
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699 oop mname2 = init_method_MemberName(mname, result); |
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700 return Handle(THREAD, mname2); |
710 | 701 } |
702 case IS_CONSTRUCTOR: | |
703 { | |
704 CallInfo result; | |
705 { | |
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706 assert(!HAS_PENDING_EXCEPTION, ""); |
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707 if (name == vmSymbols::object_initializer_name()) { |
710 | 708 LinkResolver::resolve_special_call(result, |
14239 | 709 defc, name, type, caller, caller.not_null(), THREAD); |
710 | 710 } else { |
711 break; // will throw after end of switch | |
712 } | |
713 if (HAS_PENDING_EXCEPTION) { | |
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714 return empty; |
710 | 715 } |
716 } | |
717 assert(result.is_statically_bound(), ""); | |
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718 oop mname2 = init_method_MemberName(mname, result); |
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719 return Handle(THREAD, mname2); |
710 | 720 } |
721 case IS_FIELD: | |
722 { | |
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723 fieldDescriptor result; // find_field initializes fd if found |
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724 { |
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725 assert(!HAS_PENDING_EXCEPTION, ""); |
14239 | 726 LinkResolver::resolve_field(result, defc, name, type, caller, Bytecodes::_nop, false, false, THREAD); |
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727 if (HAS_PENDING_EXCEPTION) { |
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728 return empty; |
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729 } |
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730 } |
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731 oop mname2 = init_field_MemberName(mname, result, ref_kind_is_setter(ref_kind)); |
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732 return Handle(THREAD, mname2); |
710 | 733 } |
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734 default: |
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735 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty); |
710 | 736 } |
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737 |
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738 return empty; |
710 | 739 } |
740 | |
741 // Conversely, a member name which is only initialized from JVM internals | |
742 // may have null defc, name, and type fields. | |
743 // Resolving it plants a vmtarget/vmindex in it, | |
744 // which refers directly to JVM internals. | |
745 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) { | |
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746 assert(java_lang_invoke_MemberName::is_instance(mname()), ""); |
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747 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); |
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748 int vmindex = java_lang_invoke_MemberName::vmindex(mname()); |
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749 if (vmtarget == NULL) { |
710 | 750 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand"); |
751 } | |
752 | |
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753 bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != NULL); |
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754 bool have_name = (java_lang_invoke_MemberName::name(mname()) != NULL); |
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755 bool have_type = (java_lang_invoke_MemberName::type(mname()) != NULL); |
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756 int flags = java_lang_invoke_MemberName::flags(mname()); |
710 | 757 |
758 if (suppress != 0) { | |
759 if (suppress & _suppress_defc) have_defc = true; | |
760 if (suppress & _suppress_name) have_name = true; | |
761 if (suppress & _suppress_type) have_type = true; | |
762 } | |
763 | |
764 if (have_defc && have_name && have_type) return; // nothing needed | |
765 | |
766 switch (flags & ALL_KINDS) { | |
767 case IS_METHOD: | |
768 case IS_CONSTRUCTOR: | |
769 { | |
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770 assert(vmtarget->is_method(), "method or constructor vmtarget is Method*"); |
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771 methodHandle m(THREAD, (Method*)vmtarget); |
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772 DEBUG_ONLY(vmtarget = NULL); // safety |
710 | 773 if (m.is_null()) break; |
774 if (!have_defc) { | |
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775 InstanceKlass* defc = m->method_holder(); |
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776 java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror()); |
710 | 777 } |
778 if (!have_name) { | |
779 //not java_lang_String::create_from_symbol; let's intern member names | |
780 Handle name = StringTable::intern(m->name(), CHECK); | |
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781 java_lang_invoke_MemberName::set_name(mname(), name()); |
710 | 782 } |
783 if (!have_type) { | |
784 Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK); | |
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785 java_lang_invoke_MemberName::set_type(mname(), type()); |
710 | 786 } |
787 return; | |
788 } | |
789 case IS_FIELD: | |
790 { | |
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791 assert(vmtarget->is_klass(), "field vmtarget is Klass*"); |
6983 | 792 if (!((Klass*) vmtarget)->oop_is_instance()) break; |
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793 instanceKlassHandle defc(THREAD, (Klass*) vmtarget); |
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794 DEBUG_ONLY(vmtarget = NULL); // safety |
710 | 795 bool is_static = ((flags & JVM_ACC_STATIC) != 0); |
796 fieldDescriptor fd; // find_field initializes fd if found | |
797 if (!defc->find_field_from_offset(vmindex, is_static, &fd)) | |
798 break; // cannot expand | |
799 if (!have_defc) { | |
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800 java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror()); |
710 | 801 } |
802 if (!have_name) { | |
803 //not java_lang_String::create_from_symbol; let's intern member names | |
804 Handle name = StringTable::intern(fd.name(), CHECK); | |
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805 java_lang_invoke_MemberName::set_name(mname(), name()); |
710 | 806 } |
807 if (!have_type) { | |
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808 // If it is a primitive field type, don't mess with short strings like "I". |
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809 Handle type = field_signature_type_or_null(fd.signature()); |
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810 if (type.is_null()) { |
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811 java_lang_String::create_from_symbol(fd.signature(), CHECK); |
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812 } |
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813 java_lang_invoke_MemberName::set_type(mname(), type()); |
710 | 814 } |
815 return; | |
816 } | |
817 } | |
818 THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format"); | |
819 } | |
820 | |
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821 int MethodHandles::find_MemberNames(KlassHandle k, |
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822 Symbol* name, Symbol* sig, |
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823 int mflags, KlassHandle caller, |
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824 int skip, objArrayHandle results) { |
710 | 825 // %%% take caller into account! |
826 | |
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827 Thread* thread = Thread::current(); |
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828 |
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829 if (k.is_null() || !k->oop_is_instance()) return -1; |
710 | 830 |
831 int rfill = 0, rlimit = results->length(), rskip = skip; | |
832 // overflow measurement: | |
833 int overflow = 0, overflow_limit = MAX2(1000, rlimit); | |
834 | |
835 int match_flags = mflags; | |
836 bool search_superc = ((match_flags & SEARCH_SUPERCLASSES) != 0); | |
837 bool search_intfc = ((match_flags & SEARCH_INTERFACES) != 0); | |
838 bool local_only = !(search_superc | search_intfc); | |
839 bool classes_only = false; | |
840 | |
841 if (name != NULL) { | |
842 if (name->utf8_length() == 0) return 0; // a match is not possible | |
843 } | |
844 if (sig != NULL) { | |
845 if (sig->utf8_length() == 0) return 0; // a match is not possible | |
846 if (sig->byte_at(0) == '(') | |
847 match_flags &= ~(IS_FIELD | IS_TYPE); | |
848 else | |
849 match_flags &= ~(IS_CONSTRUCTOR | IS_METHOD); | |
850 } | |
851 | |
852 if ((match_flags & IS_TYPE) != 0) { | |
853 // NYI, and Core Reflection works quite well for this query | |
854 } | |
855 | |
856 if ((match_flags & IS_FIELD) != 0) { | |
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857 for (FieldStream st(k(), local_only, !search_intfc); !st.eos(); st.next()) { |
710 | 858 if (name != NULL && st.name() != name) |
859 continue; | |
860 if (sig != NULL && st.signature() != sig) | |
861 continue; | |
862 // passed the filters | |
863 if (rskip > 0) { | |
864 --rskip; | |
865 } else if (rfill < rlimit) { | |
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866 Handle result(thread, results->obj_at(rfill++)); |
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867 if (!java_lang_invoke_MemberName::is_instance(result())) |
710 | 868 return -99; // caller bug! |
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869 oop saved = MethodHandles::init_field_MemberName(result, st.field_descriptor()); |
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870 if (saved != result()) |
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871 results->obj_at_put(rfill-1, saved); // show saved instance to user |
710 | 872 } else if (++overflow >= overflow_limit) { |
873 match_flags = 0; break; // got tired of looking at overflow | |
874 } | |
875 } | |
876 } | |
877 | |
878 if ((match_flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) { | |
879 // watch out for these guys: | |
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880 Symbol* init_name = vmSymbols::object_initializer_name(); |
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881 Symbol* clinit_name = vmSymbols::class_initializer_name(); |
710 | 882 if (name == clinit_name) clinit_name = NULL; // hack for exposing <clinit> |
883 bool negate_name_test = false; | |
884 // fix name so that it captures the intention of IS_CONSTRUCTOR | |
885 if (!(match_flags & IS_METHOD)) { | |
886 // constructors only | |
887 if (name == NULL) { | |
888 name = init_name; | |
889 } else if (name != init_name) { | |
890 return 0; // no constructors of this method name | |
891 } | |
892 } else if (!(match_flags & IS_CONSTRUCTOR)) { | |
893 // methods only | |
894 if (name == NULL) { | |
895 name = init_name; | |
896 negate_name_test = true; // if we see the name, we *omit* the entry | |
897 } else if (name == init_name) { | |
898 return 0; // no methods of this constructor name | |
899 } | |
900 } else { | |
901 // caller will accept either sort; no need to adjust name | |
902 } | |
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903 for (MethodStream st(k(), local_only, !search_intfc); !st.eos(); st.next()) { |
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904 Method* m = st.method(); |
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905 Symbol* m_name = m->name(); |
710 | 906 if (m_name == clinit_name) |
907 continue; | |
908 if (name != NULL && ((m_name != name) ^ negate_name_test)) | |
909 continue; | |
910 if (sig != NULL && m->signature() != sig) | |
911 continue; | |
912 // passed the filters | |
913 if (rskip > 0) { | |
914 --rskip; | |
915 } else if (rfill < rlimit) { | |
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916 Handle result(thread, results->obj_at(rfill++)); |
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917 if (!java_lang_invoke_MemberName::is_instance(result())) |
710 | 918 return -99; // caller bug! |
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919 CallInfo info(m); |
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920 oop saved = MethodHandles::init_method_MemberName(result, info); |
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921 if (saved != result()) |
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922 results->obj_at_put(rfill-1, saved); // show saved instance to user |
710 | 923 } else if (++overflow >= overflow_limit) { |
924 match_flags = 0; break; // got tired of looking at overflow | |
925 } | |
926 } | |
927 } | |
928 | |
929 // return number of elements we at leasted wanted to initialize | |
930 return rfill + overflow; | |
931 } | |
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932 |
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933 //------------------------------------------------------------------------------ |
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934 // MemberNameTable |
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935 // |
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936 |
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937 MemberNameTable::MemberNameTable(int methods_cnt) |
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938 : GrowableArray<jweak>(methods_cnt, true) { |
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939 assert_locked_or_safepoint(MemberNameTable_lock); |
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940 } |
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941 |
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942 MemberNameTable::~MemberNameTable() { |
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943 assert_locked_or_safepoint(MemberNameTable_lock); |
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944 int len = this->length(); |
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945 |
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946 for (int idx = 0; idx < len; idx++) { |
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947 jweak ref = this->at(idx); |
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948 JNIHandles::destroy_weak_global(ref); |
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949 } |
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950 } |
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951 |
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952 void MemberNameTable::add_member_name(jweak mem_name_wref) { |
10133
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953 assert_locked_or_safepoint(MemberNameTable_lock); |
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954 this->push(mem_name_wref); |
10133
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955 } |
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|
956 |
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957 #if INCLUDE_JVMTI |
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958 // It is called at safepoint only for RedefineClasses |
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959 void MemberNameTable::adjust_method_entries(InstanceKlass* holder, bool * trace_name_printed) { |
10133
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960 assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint"); |
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961 // For each redefined method |
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962 for (int idx = 0; idx < length(); idx++) { |
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963 oop mem_name = JNIHandles::resolve(this->at(idx)); |
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964 if (mem_name == NULL) { |
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965 continue; |
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|
966 } |
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967 Method* old_method = (Method*)java_lang_invoke_MemberName::vmtarget(mem_name); |
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968 |
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969 if (old_method == NULL || !old_method->is_old()) { |
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970 continue; // skip uninteresting entries |
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971 } |
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972 if (old_method->is_deleted()) { |
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973 // skip entries with deleted methods |
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974 continue; |
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975 } |
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976 Method* new_method = holder->method_with_idnum(old_method->orig_method_idnum()); |
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977 |
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978 assert(new_method != NULL, "method_with_idnum() should not be NULL"); |
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979 assert(old_method != new_method, "sanity check"); |
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980 |
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981 java_lang_invoke_MemberName::set_vmtarget(mem_name, new_method); |
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982 |
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983 if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
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984 if (!(*trace_name_printed)) { |
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985 // RC_TRACE_MESG macro has an embedded ResourceMark |
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986 RC_TRACE_MESG(("adjust: name=%s", |
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987 old_method->method_holder()->external_name())); |
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988 *trace_name_printed = true; |
10133
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989 } |
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990 // RC_TRACE macro has an embedded ResourceMark |
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991 RC_TRACE(0x00400000, ("MemberName method update: %s(%s)", |
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992 new_method->name()->as_C_string(), |
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993 new_method->signature()->as_C_string())); |
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994 } |
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|
995 } |
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|
996 } |
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997 #endif // INCLUDE_JVMTI |
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998 |
710 | 999 // |
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1000 // Here are the native methods in java.lang.invoke.MethodHandleNatives |
710 | 1001 // They are the private interface between this JVM and the HotSpot-specific |
1002 // Java code that implements JSR 292 method handles. | |
1003 // | |
1004 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way | |
1005 // that intrinsic (non-JNI) native methods are defined in HotSpot. | |
1006 // | |
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1007 |
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1008 JVM_ENTRY(jint, MHN_getConstant(JNIEnv *env, jobject igcls, jint which)) { |
710 | 1009 switch (which) { |
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1010 case MethodHandles::GC_COUNT_GWT: |
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1011 #ifdef COMPILER2 |
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1012 return true; |
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|
1013 #else |
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1014 return false; |
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1015 #endif |
710 | 1016 } |
1017 return 0; | |
1018 } | |
1019 JVM_END | |
1020 | |
1021 #ifndef PRODUCT | |
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1022 #define EACH_NAMED_CON(template, requirement) \ |
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1023 template(MethodHandles,GC_COUNT_GWT) \ |
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1024 template(java_lang_invoke_MemberName,MN_IS_METHOD) \ |
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1025 template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \ |
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1026 template(java_lang_invoke_MemberName,MN_IS_FIELD) \ |
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1027 template(java_lang_invoke_MemberName,MN_IS_TYPE) \ |
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1028 template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \ |
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1029 template(java_lang_invoke_MemberName,MN_SEARCH_SUPERCLASSES) \ |
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1030 template(java_lang_invoke_MemberName,MN_SEARCH_INTERFACES) \ |
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1031 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \ |
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1032 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \ |
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1033 template(MethodHandles,GC_LAMBDA_SUPPORT) \ |
710 | 1034 /*end*/ |
1035 | |
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1036 #define IGNORE_REQ(req_expr) /* req_expr */ |
710 | 1037 #define ONE_PLUS(scope,value) 1+ |
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1038 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0; |
710 | 1039 #define VALUE_COMMA(scope,value) scope::value, |
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1040 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 }; |
710 | 1041 #define STRING_NULL(scope,value) #value "\0" |
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1042 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) }; |
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1043 |
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1044 static bool advertise_con_value(int which) { |
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1045 if (which < 0) return false; |
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1046 bool ok = true; |
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1047 int count = 0; |
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1048 #define INC_COUNT(scope,value) \ |
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1049 ++count; |
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1050 #define CHECK_REQ(req_expr) \ |
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1051 if (which < count) return ok; \ |
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1052 ok = (req_expr); |
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1053 EACH_NAMED_CON(INC_COUNT, CHECK_REQ); |
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1054 #undef INC_COUNT |
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1055 #undef CHECK_REQ |
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1056 assert(count == con_value_count, ""); |
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1057 if (which < count) return ok; |
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1058 return false; |
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1059 } |
710 | 1060 |
1061 #undef ONE_PLUS | |
1062 #undef VALUE_COMMA | |
1063 #undef STRING_NULL | |
1064 #undef EACH_NAMED_CON | |
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1065 #endif // PRODUCT |
710 | 1066 |
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1067 JVM_ENTRY(jint, MHN_getNamedCon(JNIEnv *env, jobject igcls, jint which, jobjectArray box_jh)) { |
710 | 1068 #ifndef PRODUCT |
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1069 if (advertise_con_value(which)) { |
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1070 assert(which >= 0 && which < con_value_count, ""); |
710 | 1071 int con = con_values[which]; |
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1072 objArrayHandle box(THREAD, (objArrayOop) JNIHandles::resolve(box_jh)); |
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1073 if (box.not_null() && box->klass() == Universe::objectArrayKlassObj() && box->length() > 0) { |
710 | 1074 const char* str = &con_names[0]; |
1075 for (int i = 0; i < which; i++) | |
1076 str += strlen(str) + 1; // skip name and null | |
3274
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1077 oop name = java_lang_String::create_oop_from_str(str, CHECK_0); // possible safepoint |
710 | 1078 box->obj_at_put(0, name); |
1079 } | |
1080 return con; | |
1081 } | |
1082 #endif | |
1083 return 0; | |
1084 } | |
1085 JVM_END | |
1086 | |
1087 // void init(MemberName self, AccessibleObject ref) | |
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1088 JVM_ENTRY(void, MHN_init_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jobject target_jh)) { |
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1089 if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } |
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1090 if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } |
710 | 1091 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
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1092 Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); |
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1093 MethodHandles::init_MemberName(mname, target); |
710 | 1094 } |
1095 JVM_END | |
1096 | |
1097 // void expand(MemberName self) | |
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1098 JVM_ENTRY(void, MHN_expand_Mem(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
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1099 if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } |
710 | 1100 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
1101 MethodHandles::expand_MemberName(mname, 0, CHECK); | |
1102 } | |
1103 JVM_END | |
1104 | |
1105 // void resolve(MemberName self, Class<?> caller) | |
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1106 JVM_ENTRY(jobject, MHN_resolve_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jclass caller_jh)) { |
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1107 if (mname_jh == NULL) { THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "mname is null"); } |
710 | 1108 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
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1109 |
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1110 // The trusted Java code that calls this method should already have performed |
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1111 // access checks on behalf of the given caller. But, we can verify this. |
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1112 if (VerifyMethodHandles && caller_jh != NULL && |
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1113 java_lang_invoke_MemberName::clazz(mname()) != NULL) { |
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1114 Klass* reference_klass = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); |
11081
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1115 if (reference_klass != NULL && reference_klass->oop_is_objArray()) { |
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1116 reference_klass = ObjArrayKlass::cast(reference_klass)->bottom_klass(); |
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1117 } |
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1118 |
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1119 // Reflection::verify_class_access can only handle instance classes. |
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1120 if (reference_klass != NULL && reference_klass->oop_is_instance()) { |
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1121 // Emulate LinkResolver::check_klass_accessability. |
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1122 Klass* caller = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh)); |
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1123 if (!Reflection::verify_class_access(caller, |
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1124 reference_klass, |
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1125 true)) { |
6983 | 1126 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), reference_klass->external_name()); |
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1127 } |
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1128 } |
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1129 } |
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1130 |
14239 | 1131 KlassHandle caller(THREAD, |
1132 caller_jh == NULL ? (Klass*) NULL : | |
1133 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh))); | |
1134 Handle resolved = MethodHandles::resolve_MemberName(mname, caller, CHECK_NULL); | |
1135 | |
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1136 if (resolved.is_null()) { |
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1137 int flags = java_lang_invoke_MemberName::flags(mname()); |
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1138 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; |
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1139 if (!MethodHandles::ref_kind_is_valid(ref_kind)) { |
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1140 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format"); |
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1141 } |
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1142 if ((flags & ALL_KINDS) == IS_FIELD) { |
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1143 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "field resolution failed"); |
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1144 } else if ((flags & ALL_KINDS) == IS_METHOD || |
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1145 (flags & ALL_KINDS) == IS_CONSTRUCTOR) { |
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1146 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "method resolution failed"); |
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1147 } else { |
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1148 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed"); |
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1149 } |
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1150 } |
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1151 |
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1152 return JNIHandles::make_local(THREAD, resolved()); |
710 | 1153 } |
1154 JVM_END | |
1155 | |
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1156 static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) { |
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1157 if (mname == NULL || |
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1158 java_lang_invoke_MemberName::vmtarget(mname) == NULL) { |
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1159 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved"); |
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1160 } else { |
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1161 int flags = java_lang_invoke_MemberName::flags(mname); |
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1162 if ((flags & IS_FIELD) != 0 && |
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1163 (must_be_static |
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1164 ? (flags & JVM_ACC_STATIC) != 0 |
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1165 : (flags & JVM_ACC_STATIC) == 0)) { |
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1166 int vmindex = java_lang_invoke_MemberName::vmindex(mname); |
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1167 return (jlong) vmindex; |
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1168 } |
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1169 } |
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1170 const char* msg = (must_be_static ? "static field required" : "non-static field required"); |
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1171 THROW_MSG_0(vmSymbols::java_lang_InternalError(), msg); |
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1172 return 0; |
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1173 } |
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1174 |
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1175 JVM_ENTRY(jlong, MHN_objectFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
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1176 return find_member_field_offset(JNIHandles::resolve(mname_jh), false, THREAD); |
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1177 } |
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1178 JVM_END |
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1179 |
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1180 JVM_ENTRY(jlong, MHN_staticFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
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1181 return find_member_field_offset(JNIHandles::resolve(mname_jh), true, THREAD); |
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1182 } |
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1183 JVM_END |
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1184 |
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1185 JVM_ENTRY(jobject, MHN_staticFieldBase(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
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1186 // use the other function to perform sanity checks: |
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1187 jlong ignore = find_member_field_offset(JNIHandles::resolve(mname_jh), true, CHECK_NULL); |
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1188 oop clazz = java_lang_invoke_MemberName::clazz(JNIHandles::resolve_non_null(mname_jh)); |
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1189 return JNIHandles::make_local(THREAD, clazz); |
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1190 } |
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1191 JVM_END |
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1192 |
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1193 JVM_ENTRY(jobject, MHN_getMemberVMInfo(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
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1194 if (mname_jh == NULL) return NULL; |
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1195 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
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1196 intptr_t vmindex = java_lang_invoke_MemberName::vmindex(mname()); |
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1197 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); |
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1198 objArrayHandle result = oopFactory::new_objArray(SystemDictionary::Object_klass(), 2, CHECK_NULL); |
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1199 jvalue vmindex_value; vmindex_value.j = (long)vmindex; |
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1200 oop x = java_lang_boxing_object::create(T_LONG, &vmindex_value, CHECK_NULL); |
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1201 result->obj_at_put(0, x); |
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1202 x = NULL; |
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1203 if (vmtarget == NULL) { |
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1204 x = NULL; |
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1205 } else if (vmtarget->is_klass()) { |
6983 | 1206 x = ((Klass*) vmtarget)->java_mirror(); |
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1207 } else if (vmtarget->is_method()) { |
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1208 x = mname(); |
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1209 } |
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1210 result->obj_at_put(1, x); |
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1211 return JNIHandles::make_local(env, result()); |
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1212 } |
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1213 JVM_END |
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1214 |
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1215 |
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1216 |
710 | 1217 // static native int getMembers(Class<?> defc, String matchName, String matchSig, |
1218 // int matchFlags, Class<?> caller, int skip, MemberName[] results); | |
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1219 JVM_ENTRY(jint, MHN_getMembers(JNIEnv *env, jobject igcls, |
710 | 1220 jclass clazz_jh, jstring name_jh, jstring sig_jh, |
1221 int mflags, jclass caller_jh, jint skip, jobjectArray results_jh)) { | |
1222 if (clazz_jh == NULL || results_jh == NULL) return -1; | |
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1223 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz_jh))); |
710 | 1224 |
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1225 objArrayHandle results(THREAD, (objArrayOop) JNIHandles::resolve(results_jh)); |
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1226 if (results.is_null() || !results->is_objArray()) return -1; |
710 | 1227 |
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1228 TempNewSymbol name = NULL; |
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1229 TempNewSymbol sig = NULL; |
710 | 1230 if (name_jh != NULL) { |
1231 name = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(name_jh)); | |
1232 if (name == NULL) return 0; // a match is not possible | |
1233 } | |
1234 if (sig_jh != NULL) { | |
1235 sig = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(sig_jh)); | |
1236 if (sig == NULL) return 0; // a match is not possible | |
1237 } | |
1238 | |
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1239 KlassHandle caller; |
710 | 1240 if (caller_jh != NULL) { |
1241 oop caller_oop = JNIHandles::resolve_non_null(caller_jh); | |
1242 if (!java_lang_Class::is_instance(caller_oop)) return -1; | |
6725
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1243 caller = KlassHandle(THREAD, java_lang_Class::as_Klass(caller_oop)); |
710 | 1244 } |
1245 | |
3274
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1246 if (name != NULL && sig != NULL && results.not_null()) { |
710 | 1247 // try a direct resolve |
1248 // %%% TO DO | |
1249 } | |
1250 | |
10133
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1251 int res = MethodHandles::find_MemberNames(k, name, sig, mflags, |
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1252 caller, skip, results); |
710 | 1253 // TO DO: expand at least some of the MemberNames, to avoid massive callbacks |
1254 return res; | |
1255 } | |
1256 JVM_END | |
1257 | |
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1258 JVM_ENTRY(void, MHN_setCallSiteTargetNormal(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) { |
4043
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1259 Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh)); |
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1260 Handle target (THREAD, JNIHandles::resolve(target_jh)); |
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1261 { |
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1262 // Walk all nmethods depending on this call site. |
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1263 MutexLocker mu(Compile_lock, thread); |
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1264 Universe::flush_dependents_on(call_site, target); |
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1265 java_lang_invoke_CallSite::set_target(call_site(), target()); |
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1266 } |
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1267 } |
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1268 JVM_END |
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1269 |
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1270 JVM_ENTRY(void, MHN_setCallSiteTargetVolatile(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) { |
4043
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1271 Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh)); |
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1272 Handle target (THREAD, JNIHandles::resolve(target_jh)); |
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1273 { |
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1274 // Walk all nmethods depending on this call site. |
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1275 MutexLocker mu(Compile_lock, thread); |
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1276 Universe::flush_dependents_on(call_site, target); |
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1277 java_lang_invoke_CallSite::set_target_volatile(call_site(), target()); |
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1278 } |
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1279 } |
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1280 JVM_END |
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1281 |
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1282 /** |
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|
1283 * Throws a java/lang/UnsupportedOperationException unconditionally. |
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1284 * This is required by the specification of MethodHandle.invoke if |
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1285 * invoked directly. |
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1286 */ |
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1287 JVM_ENTRY(jobject, MH_invoke_UOE(JNIEnv* env, jobject mh, jobjectArray args)) { |
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|
1288 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "MethodHandle.invoke cannot be invoked reflectively"); |
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1289 return NULL; |
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1290 } |
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1291 JVM_END |
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|
1292 |
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1293 /** |
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1294 * Throws a java/lang/UnsupportedOperationException unconditionally. |
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1295 * This is required by the specification of MethodHandle.invokeExact if |
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1296 * invoked directly. |
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1297 */ |
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|
1298 JVM_ENTRY(jobject, MH_invokeExact_UOE(JNIEnv* env, jobject mh, jobjectArray args)) { |
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|
1299 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "MethodHandle.invokeExact cannot be invoked reflectively"); |
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1300 return NULL; |
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1301 } |
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1302 JVM_END |
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1303 |
710 | 1304 /// JVM_RegisterMethodHandleMethods |
1305 | |
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1306 #undef CS // Solaris builds complain |
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|
1307 |
710 | 1308 #define LANG "Ljava/lang/" |
2460 | 1309 #define JLINV "Ljava/lang/invoke/" |
710 | 1310 |
1311 #define OBJ LANG"Object;" | |
1312 #define CLS LANG"Class;" | |
1313 #define STRG LANG"String;" | |
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1314 #define CS JLINV"CallSite;" |
2460 | 1315 #define MT JLINV"MethodType;" |
1316 #define MH JLINV"MethodHandle;" | |
1317 #define MEM JLINV"MemberName;" | |
710 | 1318 |
1319 #define CC (char*) /*cast a literal from (const char*)*/ | |
1320 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1321 | |
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1322 // These are the native methods on java.lang.invoke.MethodHandleNatives. |
10276
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1323 static JNINativeMethod MHN_methods[] = { |
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1324 {CC"init", CC"("MEM""OBJ")V", FN_PTR(MHN_init_Mem)}, |
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1325 {CC"expand", CC"("MEM")V", FN_PTR(MHN_expand_Mem)}, |
6266
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1326 {CC"resolve", CC"("MEM""CLS")"MEM, FN_PTR(MHN_resolve_Mem)}, |
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1327 {CC"getConstant", CC"(I)I", FN_PTR(MHN_getConstant)}, |
710 | 1328 // static native int getNamedCon(int which, Object[] name) |
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1329 {CC"getNamedCon", CC"(I["OBJ")I", FN_PTR(MHN_getNamedCon)}, |
710 | 1330 // static native int getMembers(Class<?> defc, String matchName, String matchSig, |
1331 // int matchFlags, Class<?> caller, int skip, MemberName[] results); | |
6266
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1332 {CC"getMembers", CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHN_getMembers)}, |
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1333 {CC"objectFieldOffset", CC"("MEM")J", FN_PTR(MHN_objectFieldOffset)}, |
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1334 {CC"setCallSiteTargetNormal", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetNormal)}, |
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1335 {CC"setCallSiteTargetVolatile", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetVolatile)}, |
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1336 {CC"staticFieldOffset", CC"("MEM")J", FN_PTR(MHN_staticFieldOffset)}, |
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1337 {CC"staticFieldBase", CC"("MEM")"OBJ, FN_PTR(MHN_staticFieldBase)}, |
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1338 {CC"getMemberVMInfo", CC"("MEM")"OBJ, FN_PTR(MHN_getMemberVMInfo)} |
710 | 1339 }; |
1340 | |
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1341 static JNINativeMethod MH_methods[] = { |
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1342 // UnsupportedOperationException throwers |
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1343 {CC"invoke", CC"(["OBJ")"OBJ, FN_PTR(MH_invoke_UOE)}, |
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1344 {CC"invokeExact", CC"(["OBJ")"OBJ, FN_PTR(MH_invokeExact_UOE)} |
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1345 }; |
710 | 1346 |
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1347 /** |
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1348 * Helper method to register native methods. |
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1349 */ |
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1350 static bool register_natives(JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
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1351 int status = env->RegisterNatives(clazz, methods, nMethods); |
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1352 if (status != JNI_OK || env->ExceptionOccurred()) { |
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1353 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); |
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1354 env->ExceptionClear(); |
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1355 return false; |
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1356 } |
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1357 return true; |
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1358 } |
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1359 |
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1360 /** |
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1361 * This one function is exported, used by NativeLookup. |
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1362 */ |
710 | 1363 JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) { |
2416
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1364 if (!EnableInvokeDynamic) { |
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1365 warning("JSR 292 is disabled in this JVM. Use -XX:+UnlockDiagnosticVMOptions -XX:+EnableInvokeDynamic to enable."); |
710 | 1366 return; // bind nothing |
1367 } | |
1368 | |
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1369 assert(!MethodHandles::enabled(), "must not be enabled"); |
1039
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1370 bool enable_MH = true; |
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1371 |
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1372 jclass MH_class = NULL; |
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1373 if (SystemDictionary::MethodHandle_klass() == NULL) { |
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1374 enable_MH = false; |
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1375 } else { |
6983 | 1376 oop mirror = SystemDictionary::MethodHandle_klass()->java_mirror(); |
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1377 MH_class = (jclass) JNIHandles::make_local(env, mirror); |
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1378 } |
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1379 |
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1380 if (enable_MH) { |
710 | 1381 ThreadToNativeFromVM ttnfv(thread); |
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1382 |
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1383 if (enable_MH) { |
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1384 enable_MH = register_natives(env, MHN_class, MHN_methods, sizeof(MHN_methods)/sizeof(JNINativeMethod)); |
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1385 } |
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1386 if (enable_MH) { |
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1387 enable_MH = register_natives(env, MH_class, MH_methods, sizeof(MH_methods)/sizeof(JNINativeMethod)); |
710 | 1388 } |
1389 } | |
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1390 |
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1391 if (TraceInvokeDynamic) { |
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1392 tty->print_cr("MethodHandle support loaded (using LambdaForms)"); |
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1393 } |
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1394 |
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1395 if (enable_MH) { |
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1396 MethodHandles::generate_adapters(); |
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1397 MethodHandles::set_enabled(true); |
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1398 } |
710 | 1399 } |
1400 JVM_END |