Mercurial > hg > truffle
annotate src/share/vm/prims/methodHandles.cpp @ 10259:39ead0411f07
8013875: Incorrect vtable index being set during methodHandle creation for static
Summary: Set vtable index as appropriate for static interface methods and for interface methods invoked via invokespecial. To be improved in a later enhancement to CallInfo.
Reviewed-by: jrose, twisti
author | bharadwaj |
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date | Wed, 08 May 2013 14:18:03 -0700 |
parents | 746b070f5022 |
children | e484fe2abebd |
rev | line source |
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710 | 1 /* |
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2 * Copyright (c) 2008, 2012, 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" | |
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32 #include "prims/jvmtiRedefineClassesTrace.hpp" |
1972 | 33 #include "prims/methodHandles.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 Thread* thread = Thread::current(); |
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131 oop target_oop = target(); |
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132 Klass* target_klass = target_oop->klass(); |
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133 if (target_klass == SystemDictionary::reflect_Field_klass()) { |
710 | 134 oop clazz = java_lang_reflect_Field::clazz(target_oop); // fd.field_holder() |
135 int slot = java_lang_reflect_Field::slot(target_oop); // fd.index() | |
136 int mods = java_lang_reflect_Field::modifiers(target_oop); | |
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137 oop type = java_lang_reflect_Field::type(target_oop); |
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138 oop name = java_lang_reflect_Field::name(target_oop); |
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139 KlassHandle k(thread, java_lang_Class::as_Klass(clazz)); |
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140 intptr_t offset = InstanceKlass::cast(k())->field_offset(slot); |
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141 return init_field_MemberName(mname, k, accessFlags_from(mods), type, name, offset); |
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142 } else if (target_klass == SystemDictionary::reflect_Method_klass()) { |
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143 oop clazz = java_lang_reflect_Method::clazz(target_oop); |
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144 int slot = java_lang_reflect_Method::slot(target_oop); |
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145 KlassHandle k(thread, java_lang_Class::as_Klass(clazz)); |
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146 if (!k.is_null() && k->oop_is_instance()) { |
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147 Method* m = InstanceKlass::cast(k())->method_with_idnum(slot); |
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148 return init_method_MemberName(mname, m, true, k); |
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149 } |
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150 } else if (target_klass == SystemDictionary::reflect_Constructor_klass()) { |
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151 oop clazz = java_lang_reflect_Constructor::clazz(target_oop); |
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152 int slot = java_lang_reflect_Constructor::slot(target_oop); |
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153 KlassHandle k(thread, java_lang_Class::as_Klass(clazz)); |
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154 if (!k.is_null() && k->oop_is_instance()) { |
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155 Method* m = InstanceKlass::cast(k())->method_with_idnum(slot); |
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156 return init_method_MemberName(mname, m, false, k); |
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157 } |
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158 } else if (target_klass == SystemDictionary::MemberName_klass()) { |
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159 // Note: This only works if the MemberName has already been resolved. |
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160 oop clazz = java_lang_invoke_MemberName::clazz(target_oop); |
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161 int flags = java_lang_invoke_MemberName::flags(target_oop); |
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162 Metadata* vmtarget=java_lang_invoke_MemberName::vmtarget(target_oop); |
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163 intptr_t vmindex = java_lang_invoke_MemberName::vmindex(target_oop); |
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164 KlassHandle k(thread, java_lang_Class::as_Klass(clazz)); |
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165 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; |
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166 if (vmtarget == NULL) return NULL; // not resolved |
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167 if ((flags & IS_FIELD) != 0) { |
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168 assert(vmtarget->is_klass(), "field vmtarget is Klass*"); |
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169 int basic_mods = (ref_kind_is_static(ref_kind) ? JVM_ACC_STATIC : 0); |
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170 // FIXME: how does k (receiver_limit) contribute? |
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171 KlassHandle k_vmtarget(thread, (Klass*)vmtarget); |
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172 return init_field_MemberName(mname, k_vmtarget, accessFlags_from(basic_mods), NULL, NULL, vmindex); |
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173 } else if ((flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) { |
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174 assert(vmtarget->is_method(), "method or constructor vmtarget is Method*"); |
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175 return init_method_MemberName(mname, (Method*)vmtarget, ref_kind_does_dispatch(ref_kind), k); |
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176 } else { |
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177 return NULL; |
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178 } |
710 | 179 } |
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180 return NULL; |
710 | 181 } |
182 | |
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183 oop MethodHandles::init_method_MemberName(Handle mname, Method* m, bool do_dispatch, |
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184 KlassHandle receiver_limit_h) { |
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185 Klass* receiver_limit = receiver_limit_h(); |
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186 AccessFlags mods = m->access_flags(); |
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187 int flags = (jushort)( mods.as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); |
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188 int vmindex = Method::nonvirtual_vtable_index; // implies never any dispatch |
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189 Klass* mklass = m->method_holder(); |
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190 if (receiver_limit == NULL) |
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191 receiver_limit = mklass; |
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192 if (m->is_initializer()) { |
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193 flags |= IS_CONSTRUCTOR | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT); |
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194 } else if (mods.is_static()) { |
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195 flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT); |
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196 } else if (receiver_limit != mklass && |
6983 | 197 !receiver_limit->is_subtype_of(mklass)) { |
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198 return NULL; // bad receiver limit |
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199 } else if (do_dispatch && receiver_limit->is_interface() && |
6983 | 200 mklass->is_interface()) { |
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201 flags |= IS_METHOD | (JVM_REF_invokeInterface << REFERENCE_KIND_SHIFT); |
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202 receiver_limit = mklass; // ignore passed-in limit; interfaces are interconvertible |
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203 vmindex = klassItable::compute_itable_index(m); |
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204 } else if (do_dispatch && mklass != receiver_limit && mklass->is_interface()) { |
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205 flags |= IS_METHOD | (JVM_REF_invokeVirtual << REFERENCE_KIND_SHIFT); |
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206 // it is a miranda method, so m->vtable_index is not what we want |
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207 ResourceMark rm; |
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208 klassVtable* vt = InstanceKlass::cast(receiver_limit)->vtable(); |
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209 vmindex = vt->index_of_miranda(m->name(), m->signature()); |
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210 } else if (!do_dispatch || m->can_be_statically_bound()) { |
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211 flags |= IS_METHOD | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT); |
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212 } else { |
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213 flags |= IS_METHOD | (JVM_REF_invokeVirtual << REFERENCE_KIND_SHIFT); |
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214 vmindex = m->vtable_index(); |
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215 } |
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216 |
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217 // @CallerSensitive annotation detected |
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218 if (m->caller_sensitive()) { |
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219 flags |= CALLER_SENSITIVE; |
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220 } |
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221 |
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222 oop mname_oop = mname(); |
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223 java_lang_invoke_MemberName::set_flags( mname_oop, flags); |
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224 java_lang_invoke_MemberName::set_vmtarget(mname_oop, m); |
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225 java_lang_invoke_MemberName::set_vmindex( mname_oop, vmindex); // vtable/itable index |
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226 java_lang_invoke_MemberName::set_clazz( mname_oop, receiver_limit->java_mirror()); |
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227 // Note: name and type can be lazily computed by resolve_MemberName, |
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228 // if Java code needs them as resolved String and MethodType objects. |
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229 // The clazz must be eagerly stored, because it provides a GC |
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230 // root to help keep alive the Method*. |
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231 // If relevant, the vtable or itable value is stored as vmindex. |
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232 // This is done eagerly, since it is readily available without |
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233 // constructing any new objects. |
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234 // TO DO: maybe intern mname_oop |
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235 m->method_holder()->add_member_name(mname); |
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236 return mname(); |
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237 } |
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238 |
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239 Handle MethodHandles::init_method_MemberName(Handle mname, CallInfo& info, TRAPS) { |
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240 Handle empty; |
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241 if (info.resolved_appendix().not_null()) { |
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242 // The resolved MemberName must not be accompanied by an appendix argument, |
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243 // since there is no way to bind this value into the MemberName. |
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244 // Caller is responsible to prevent this from happening. |
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245 THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty); |
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246 } |
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247 methodHandle m = info.resolved_method(); |
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248 KlassHandle defc = info.resolved_klass(); |
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249 int vmindex = Method::invalid_vtable_index; |
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250 if (defc->is_interface() && m->method_holder()->is_interface()) { |
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251 // static interface methods do not reference vtable or itable |
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252 if (m->is_static()) { |
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253 vmindex = Method::nonvirtual_vtable_index; |
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254 } |
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255 // interface methods invoked via invokespecial also |
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256 // do not reference vtable or itable. |
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257 int ref_kind = ((java_lang_invoke_MemberName::flags(mname()) >> |
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258 REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK); |
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259 if (ref_kind == JVM_REF_invokeSpecial) { |
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260 vmindex = Method::nonvirtual_vtable_index; |
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261 } |
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262 // If neither m is static nor ref_kind is invokespecial, |
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263 // set it to itable index. |
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264 if (vmindex == Method::invalid_vtable_index) { |
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265 // LinkResolver does not report itable indexes! (fix this?) |
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266 vmindex = klassItable::compute_itable_index(m()); |
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267 } |
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268 } else if (m->can_be_statically_bound()) { |
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269 // LinkResolver reports vtable index even for final methods! |
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270 vmindex = Method::nonvirtual_vtable_index; |
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271 } else { |
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272 vmindex = info.vtable_index(); |
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273 } |
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274 oop res = init_method_MemberName(mname, m(), (vmindex >= 0), defc()); |
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275 assert(res == NULL || (java_lang_invoke_MemberName::vmindex(res) == vmindex), ""); |
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276 return Handle(THREAD, res); |
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277 } |
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278 |
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279 oop MethodHandles::init_field_MemberName(Handle mname, KlassHandle field_holder, |
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280 AccessFlags mods, oop type, oop name, |
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281 intptr_t offset, bool is_setter) { |
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282 int flags = (jushort)( mods.as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS ); |
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283 flags |= IS_FIELD | ((mods.is_static() ? JVM_REF_getStatic : JVM_REF_getField) << REFERENCE_KIND_SHIFT); |
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284 if (is_setter) flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT); |
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285 Metadata* vmtarget = field_holder(); |
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286 int vmindex = offset; // determines the field uniquely when combined with static bit |
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287 oop mname_oop = mname(); |
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288 java_lang_invoke_MemberName::set_flags(mname_oop, flags); |
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289 java_lang_invoke_MemberName::set_vmtarget(mname_oop, vmtarget); |
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290 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); |
6983 | 291 java_lang_invoke_MemberName::set_clazz(mname_oop, field_holder->java_mirror()); |
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292 if (name != NULL) |
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293 java_lang_invoke_MemberName::set_name(mname_oop, name); |
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294 if (type != NULL) |
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295 java_lang_invoke_MemberName::set_type(mname_oop, type); |
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296 // Note: name and type can be lazily computed by resolve_MemberName, |
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297 // if Java code needs them as resolved String and Class objects. |
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298 // Note that the incoming type oop might be pre-resolved (non-null). |
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299 // The base clazz and field offset (vmindex) must be eagerly stored, |
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300 // because they unambiguously identify the field. |
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301 // Although the fieldDescriptor::_index would also identify the field, |
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302 // we do not use it, because it is harder to decode. |
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303 // TO DO: maybe intern mname_oop |
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304 InstanceKlass::cast(field_holder())->add_member_name(mname); |
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305 return mname(); |
710 | 306 } |
307 | |
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308 Handle MethodHandles::init_field_MemberName(Handle mname, FieldAccessInfo& info, TRAPS) { |
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309 return Handle(); |
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310 #if 0 // FIXME |
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311 KlassHandle field_holder = info.klass(); |
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312 intptr_t field_offset = info.field_offset(); |
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313 return init_field_MemberName(mname_oop, field_holder(), |
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314 info.access_flags(), |
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315 type, name, |
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316 field_offset, false /*is_setter*/); |
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317 #endif |
710 | 318 } |
319 | |
320 | |
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321 // JVM 2.9 Special Methods: |
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322 // A method is signature polymorphic if and only if all of the following conditions hold : |
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323 // * It is declared in the java.lang.invoke.MethodHandle class. |
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324 // * It has a single formal parameter of type Object[]. |
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325 // * It has a return type of Object. |
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326 // * It has the ACC_VARARGS and ACC_NATIVE flags set. |
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327 bool MethodHandles::is_method_handle_invoke_name(Klass* klass, Symbol* name) { |
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328 if (klass == NULL) |
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329 return false; |
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330 // The following test will fail spuriously during bootstrap of MethodHandle itself: |
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331 // if (klass != SystemDictionary::MethodHandle_klass()) |
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332 // Test the name instead: |
6983 | 333 if (klass->name() != vmSymbols::java_lang_invoke_MethodHandle()) |
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334 return false; |
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335 Symbol* poly_sig = vmSymbols::object_array_object_signature(); |
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336 Method* m = InstanceKlass::cast(klass)->find_method(name, poly_sig); |
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337 if (m == NULL) return false; |
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338 int required = JVM_ACC_NATIVE | JVM_ACC_VARARGS; |
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339 int flags = m->access_flags().as_int(); |
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340 return (flags & required) == required; |
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341 } |
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342 |
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343 |
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344 Symbol* MethodHandles::signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid) { |
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345 assert(is_signature_polymorphic_intrinsic(iid), err_msg("iid=%d", iid)); |
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346 switch (iid) { |
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347 case vmIntrinsics::_invokeBasic: return vmSymbols::invokeBasic_name(); |
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348 case vmIntrinsics::_linkToVirtual: return vmSymbols::linkToVirtual_name(); |
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349 case vmIntrinsics::_linkToStatic: return vmSymbols::linkToStatic_name(); |
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350 case vmIntrinsics::_linkToSpecial: return vmSymbols::linkToSpecial_name(); |
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351 case vmIntrinsics::_linkToInterface: return vmSymbols::linkToInterface_name(); |
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352 } |
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353 assert(false, ""); |
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354 return 0; |
710 | 355 } |
356 | |
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357 int MethodHandles::signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid) { |
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358 switch (iid) { |
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359 case vmIntrinsics::_invokeBasic: return 0; |
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360 case vmIntrinsics::_linkToVirtual: return JVM_REF_invokeVirtual; |
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361 case vmIntrinsics::_linkToStatic: return JVM_REF_invokeStatic; |
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362 case vmIntrinsics::_linkToSpecial: return JVM_REF_invokeSpecial; |
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363 case vmIntrinsics::_linkToInterface: return JVM_REF_invokeInterface; |
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364 } |
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365 assert(false, err_msg("iid=%d", iid)); |
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366 return 0; |
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367 } |
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368 |
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369 vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Symbol* name) { |
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370 vmSymbols::SID name_id = vmSymbols::find_sid(name); |
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371 switch (name_id) { |
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372 // The ID _invokeGeneric stands for all non-static signature-polymorphic methods, except built-ins. |
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373 case vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name): return vmIntrinsics::_invokeGeneric; |
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374 // The only built-in non-static signature-polymorphic method is MethodHandle.invokeBasic: |
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375 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeBasic_name): return vmIntrinsics::_invokeBasic; |
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376 |
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377 // There is one static signature-polymorphic method for each JVM invocation mode. |
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378 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToVirtual_name): return vmIntrinsics::_linkToVirtual; |
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379 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToStatic_name): return vmIntrinsics::_linkToStatic; |
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380 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToSpecial_name): return vmIntrinsics::_linkToSpecial; |
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381 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToInterface_name): return vmIntrinsics::_linkToInterface; |
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382 } |
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383 |
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384 // Cover the case of invokeExact and any future variants of invokeFoo. |
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385 Klass* mh_klass = SystemDictionary::well_known_klass( |
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386 SystemDictionary::WK_KLASS_ENUM_NAME(MethodHandle_klass) ); |
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387 if (mh_klass != NULL && is_method_handle_invoke_name(mh_klass, name)) |
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388 return vmIntrinsics::_invokeGeneric; |
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389 |
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390 // Note: The pseudo-intrinsic _compiledLambdaForm is never linked against. |
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391 // Instead it is used to mark lambda forms bound to invokehandle or invokedynamic. |
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392 return vmIntrinsics::_none; |
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393 } |
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394 |
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395 vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Klass* klass, Symbol* name) { |
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396 if (klass != NULL && |
6983 | 397 klass->name() == vmSymbols::java_lang_invoke_MethodHandle()) { |
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398 vmIntrinsics::ID iid = signature_polymorphic_name_id(name); |
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399 if (iid != vmIntrinsics::_none) |
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400 return iid; |
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401 if (is_method_handle_invoke_name(klass, name)) |
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402 return vmIntrinsics::_invokeGeneric; |
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403 } |
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404 return vmIntrinsics::_none; |
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405 } |
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406 |
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407 |
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408 // convert the external string or reflective type to an internal signature |
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409 Symbol* MethodHandles::lookup_signature(oop type_str, bool intern_if_not_found, TRAPS) { |
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410 if (java_lang_invoke_MethodType::is_instance(type_str)) { |
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411 return java_lang_invoke_MethodType::as_signature(type_str, intern_if_not_found, CHECK_NULL); |
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412 } else if (java_lang_Class::is_instance(type_str)) { |
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413 return java_lang_Class::as_signature(type_str, false, CHECK_NULL); |
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414 } else if (java_lang_String::is_instance(type_str)) { |
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415 if (intern_if_not_found) { |
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416 return java_lang_String::as_symbol(type_str, CHECK_NULL); |
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417 } else { |
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418 return java_lang_String::as_symbol_or_null(type_str); |
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419 } |
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420 } else { |
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421 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized type", NULL); |
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422 } |
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423 } |
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424 |
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425 static const char OBJ_SIG[] = "Ljava/lang/Object;"; |
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426 enum { OBJ_SIG_LEN = 18 }; |
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427 |
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428 bool MethodHandles::is_basic_type_signature(Symbol* sig) { |
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429 assert(vmSymbols::object_signature()->utf8_length() == (int)OBJ_SIG_LEN, ""); |
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430 assert(vmSymbols::object_signature()->equals(OBJ_SIG), ""); |
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431 const int len = sig->utf8_length(); |
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432 for (int i = 0; i < len; i++) { |
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433 switch (sig->byte_at(i)) { |
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434 case 'L': |
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435 // only java/lang/Object is valid here |
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436 if (sig->index_of_at(i, OBJ_SIG, OBJ_SIG_LEN) != i) |
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437 return false; |
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438 i += OBJ_SIG_LEN-1; //-1 because of i++ in loop |
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439 continue; |
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440 case '(': case ')': case 'V': |
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441 case 'I': case 'J': case 'F': case 'D': |
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442 continue; |
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443 //case '[': |
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444 //case 'Z': case 'B': case 'C': case 'S': |
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445 default: |
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446 return false; |
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447 } |
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448 } |
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449 return true; |
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450 } |
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451 |
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452 Symbol* MethodHandles::lookup_basic_type_signature(Symbol* sig, bool keep_last_arg, TRAPS) { |
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453 Symbol* bsig = NULL; |
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454 if (sig == NULL) { |
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455 return sig; |
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456 } else if (is_basic_type_signature(sig)) { |
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457 sig->increment_refcount(); |
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458 return sig; // that was easy |
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459 } else if (sig->byte_at(0) != '(') { |
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460 BasicType bt = char2type(sig->byte_at(0)); |
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461 if (is_subword_type(bt)) { |
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462 bsig = vmSymbols::int_signature(); |
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463 } else { |
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464 assert(bt == T_OBJECT || bt == T_ARRAY, "is_basic_type_signature was false"); |
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465 bsig = vmSymbols::object_signature(); |
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466 } |
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467 } else { |
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468 ResourceMark rm; |
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469 stringStream buffer(128); |
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470 buffer.put('('); |
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471 int arg_pos = 0, keep_arg_pos = -1; |
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472 if (keep_last_arg) |
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473 keep_arg_pos = ArgumentCount(sig).size() - 1; |
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474 for (SignatureStream ss(sig); !ss.is_done(); ss.next()) { |
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475 BasicType bt = ss.type(); |
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476 size_t this_arg_pos = buffer.size(); |
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477 if (ss.at_return_type()) { |
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478 buffer.put(')'); |
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479 } |
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480 if (arg_pos == keep_arg_pos) { |
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481 buffer.write((char*) ss.raw_bytes(), |
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482 (int) ss.raw_length()); |
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483 } else if (bt == T_OBJECT || bt == T_ARRAY) { |
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484 buffer.write(OBJ_SIG, OBJ_SIG_LEN); |
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485 } else { |
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486 if (is_subword_type(bt)) |
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487 bt = T_INT; |
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488 buffer.put(type2char(bt)); |
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489 } |
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490 arg_pos++; |
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491 } |
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492 const char* sigstr = buffer.base(); |
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493 int siglen = (int) buffer.size(); |
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494 bsig = SymbolTable::new_symbol(sigstr, siglen, THREAD); |
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495 } |
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496 assert(is_basic_type_signature(bsig) || |
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497 // detune assert in case the injected argument is not a basic type: |
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498 keep_last_arg, ""); |
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499 return bsig; |
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500 } |
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501 |
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502 void MethodHandles::print_as_basic_type_signature_on(outputStream* st, |
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503 Symbol* sig, |
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504 bool keep_arrays, |
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505 bool keep_basic_names) { |
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506 st = st ? st : tty; |
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507 int len = sig->utf8_length(); |
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508 int array = 0; |
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509 bool prev_type = false; |
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510 for (int i = 0; i < len; i++) { |
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511 char ch = sig->byte_at(i); |
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512 switch (ch) { |
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513 case '(': case ')': |
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514 prev_type = false; |
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515 st->put(ch); |
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516 continue; |
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517 case '[': |
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518 if (!keep_basic_names && keep_arrays) |
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519 st->put(ch); |
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520 array++; |
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521 continue; |
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522 case 'L': |
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523 { |
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524 if (prev_type) st->put(','); |
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525 int start = i+1, slash = start; |
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526 while (++i < len && (ch = sig->byte_at(i)) != ';') { |
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527 if (ch == '/' || ch == '.' || ch == '$') slash = i+1; |
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528 } |
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529 if (slash < i) start = slash; |
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|
530 if (!keep_basic_names) { |
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531 st->put('L'); |
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532 } else { |
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533 for (int j = start; j < i; j++) |
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534 st->put(sig->byte_at(j)); |
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535 prev_type = true; |
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536 } |
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537 break; |
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538 } |
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539 default: |
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|
540 { |
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541 if (array && char2type(ch) != T_ILLEGAL && !keep_arrays) { |
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542 ch = '['; |
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543 array = 0; |
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544 } |
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545 if (prev_type) st->put(','); |
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546 const char* n = NULL; |
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547 if (keep_basic_names) |
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548 n = type2name(char2type(ch)); |
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549 if (n == NULL) { |
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550 // unknown letter, or we don't want to know its name |
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551 st->put(ch); |
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552 } else { |
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553 st->print(n); |
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554 prev_type = true; |
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|
555 } |
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556 break; |
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|
557 } |
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|
558 } |
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559 // Switch break goes here to take care of array suffix: |
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560 if (prev_type) { |
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561 while (array > 0) { |
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562 st->print("[]"); |
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563 --array; |
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|
564 } |
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|
565 } |
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566 array = 0; |
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|
567 } |
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|
568 } |
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|
569 |
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|
570 |
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|
571 |
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572 static oop object_java_mirror() { |
6983 | 573 return SystemDictionary::Object_klass()->java_mirror(); |
6266
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574 } |
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|
575 |
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576 static oop field_name_or_null(Symbol* s) { |
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577 if (s == NULL) return NULL; |
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578 return StringTable::lookup(s); |
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|
579 } |
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|
580 |
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581 static oop field_signature_type_or_null(Symbol* s) { |
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|
582 if (s == NULL) return NULL; |
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583 BasicType bt = FieldType::basic_type(s); |
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584 if (is_java_primitive(bt)) { |
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585 assert(s->utf8_length() == 1, ""); |
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586 return java_lang_Class::primitive_mirror(bt); |
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|
587 } |
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588 // Here are some more short cuts for common types. |
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589 // They are optional, since reference types can be resolved lazily. |
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590 if (bt == T_OBJECT) { |
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591 if (s == vmSymbols::object_signature()) { |
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592 return object_java_mirror(); |
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593 } else if (s == vmSymbols::class_signature()) { |
6983 | 594 return SystemDictionary::Class_klass()->java_mirror(); |
6266
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595 } else if (s == vmSymbols::string_signature()) { |
6983 | 596 return SystemDictionary::String_klass()->java_mirror(); |
6266
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597 } |
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|
598 } |
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|
599 return NULL; |
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|
600 } |
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|
601 |
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|
602 |
710 | 603 // An unresolved member name is a mere symbolic reference. |
604 // Resolving it plants a vmtarget/vmindex in it, | |
6725
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605 // which refers directly to JVM internals. |
6266
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606 Handle MethodHandles::resolve_MemberName(Handle mname, TRAPS) { |
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607 Handle empty; |
2357
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jrose
parents:
2356
diff
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|
608 assert(java_lang_invoke_MemberName::is_instance(mname()), ""); |
6266
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|
609 |
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610 if (java_lang_invoke_MemberName::vmtarget(mname()) != NULL) { |
1d7922586cf6
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|
611 // Already resolved. |
1d7922586cf6
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612 DEBUG_ONLY(int vmindex = java_lang_invoke_MemberName::vmindex(mname())); |
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613 assert(vmindex >= Method::nonvirtual_vtable_index, ""); |
6266
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614 return mname; |
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|
615 } |
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|
616 |
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617 Handle defc_oop(THREAD, java_lang_invoke_MemberName::clazz(mname())); |
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618 Handle name_str(THREAD, java_lang_invoke_MemberName::name( mname())); |
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619 Handle type_str(THREAD, java_lang_invoke_MemberName::type( mname())); |
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620 int flags = java_lang_invoke_MemberName::flags(mname()); |
6266
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621 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; |
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622 if (!ref_kind_is_valid(ref_kind)) { |
1d7922586cf6
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|
623 THROW_MSG_(vmSymbols::java_lang_InternalError(), "obsolete MemberName format", empty); |
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|
624 } |
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|
625 |
1d7922586cf6
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|
626 DEBUG_ONLY(int old_vmindex); |
1d7922586cf6
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|
627 assert((old_vmindex = java_lang_invoke_MemberName::vmindex(mname())) == 0, "clean input"); |
710 | 628 |
3274
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|
629 if (defc_oop.is_null() || name_str.is_null() || type_str.is_null()) { |
6266
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630 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "nothing to resolve", empty); |
710 | 631 } |
3274
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|
632 |
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|
633 instanceKlassHandle defc; |
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634 { |
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635 Klass* defc_klass = java_lang_Class::as_Klass(defc_oop()); |
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636 if (defc_klass == NULL) return empty; // a primitive; no resolution possible |
6983 | 637 if (!defc_klass->oop_is_instance()) { |
638 if (!defc_klass->oop_is_array()) return empty; | |
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639 defc_klass = SystemDictionary::Object_klass(); |
3274
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640 } |
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641 defc = instanceKlassHandle(THREAD, defc_klass); |
710 | 642 } |
643 if (defc.is_null()) { | |
6266
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644 THROW_MSG_(vmSymbols::java_lang_InternalError(), "primitive class", empty); |
710 | 645 } |
6266
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646 defc->link_class(CHECK_(empty)); // possible safepoint |
710 | 647 |
648 // convert the external string name to an internal symbol | |
3274
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649 TempNewSymbol name = java_lang_String::as_symbol_or_null(name_str()); |
6266
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650 if (name == NULL) return empty; // no such name |
3781
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|
651 if (name == vmSymbols::class_initializer_name()) |
6266
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652 return empty; // illegal name |
710 | 653 |
6266
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|
654 vmIntrinsics::ID mh_invoke_id = vmIntrinsics::_none; |
1508
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|
655 if ((flags & ALL_KINDS) == IS_METHOD && |
6266
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656 (defc() == SystemDictionary::MethodHandle_klass()) && |
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657 (ref_kind == JVM_REF_invokeVirtual || |
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658 ref_kind == JVM_REF_invokeSpecial || |
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659 // static invocation mode is required for _linkToVirtual, etc.: |
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660 ref_kind == JVM_REF_invokeStatic)) { |
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661 vmIntrinsics::ID iid = signature_polymorphic_name_id(name); |
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662 if (iid != vmIntrinsics::_none && |
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663 ((ref_kind == JVM_REF_invokeStatic) == is_signature_polymorphic_static(iid))) { |
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664 // Virtual methods invoke and invokeExact, plus internal invokers like _invokeBasic. |
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665 // For a static reference it could an internal linkage routine like _linkToVirtual, etc. |
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666 mh_invoke_id = iid; |
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667 } |
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668 } |
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669 |
710 | 670 // convert the external string or reflective type to an internal signature |
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671 TempNewSymbol type = lookup_signature(type_str(), (mh_invoke_id != vmIntrinsics::_none), CHECK_(empty)); |
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672 if (type == NULL) return empty; // no such signature exists in the VM |
710 | 673 |
674 // Time to do the lookup. | |
675 switch (flags & ALL_KINDS) { | |
676 case IS_METHOD: | |
677 { | |
678 CallInfo result; | |
679 { | |
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680 assert(!HAS_PENDING_EXCEPTION, ""); |
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681 if (ref_kind == JVM_REF_invokeStatic) { |
710 | 682 LinkResolver::resolve_static_call(result, |
683 defc, name, type, KlassHandle(), false, false, THREAD); | |
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684 } else if (ref_kind == JVM_REF_invokeInterface) { |
710 | 685 LinkResolver::resolve_interface_call(result, Handle(), defc, |
686 defc, name, type, KlassHandle(), false, false, THREAD); | |
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687 } else if (mh_invoke_id != vmIntrinsics::_none) { |
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688 assert(!is_signature_polymorphic_static(mh_invoke_id), ""); |
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689 LinkResolver::resolve_handle_call(result, |
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690 defc, name, type, KlassHandle(), THREAD); |
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691 } else if (ref_kind == JVM_REF_invokeSpecial) { |
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692 LinkResolver::resolve_special_call(result, |
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693 defc, name, type, KlassHandle(), false, THREAD); |
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694 } else if (ref_kind == JVM_REF_invokeVirtual) { |
710 | 695 LinkResolver::resolve_virtual_call(result, Handle(), defc, |
696 defc, name, type, KlassHandle(), false, false, THREAD); | |
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697 } else { |
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698 assert(false, err_msg("ref_kind=%d", ref_kind)); |
710 | 699 } |
700 if (HAS_PENDING_EXCEPTION) { | |
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701 return empty; |
710 | 702 } |
703 } | |
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704 return init_method_MemberName(mname, result, THREAD); |
710 | 705 } |
706 case IS_CONSTRUCTOR: | |
707 { | |
708 CallInfo result; | |
709 { | |
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710 assert(!HAS_PENDING_EXCEPTION, ""); |
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711 if (name == vmSymbols::object_initializer_name()) { |
710 | 712 LinkResolver::resolve_special_call(result, |
713 defc, name, type, KlassHandle(), false, THREAD); | |
714 } else { | |
715 break; // will throw after end of switch | |
716 } | |
717 if (HAS_PENDING_EXCEPTION) { | |
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718 return empty; |
710 | 719 } |
720 } | |
721 assert(result.is_statically_bound(), ""); | |
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722 return init_method_MemberName(mname, result, THREAD); |
710 | 723 } |
724 case IS_FIELD: | |
725 { | |
726 // This is taken from LinkResolver::resolve_field, sans access checks. | |
727 fieldDescriptor fd; // find_field initializes fd if found | |
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728 KlassHandle sel_klass(THREAD, InstanceKlass::cast(defc())->find_field(name, type, &fd)); |
710 | 729 // check if field exists; i.e., if a klass containing the field def has been selected |
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730 if (sel_klass.is_null()) return empty; // should not happen |
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731 oop type = field_signature_type_or_null(fd.signature()); |
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732 oop name = field_name_or_null(fd.name()); |
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733 bool is_setter = (ref_kind_is_valid(ref_kind) && ref_kind_is_setter(ref_kind)); |
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734 mname = Handle(THREAD, |
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735 init_field_MemberName(mname, sel_klass, |
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736 fd.access_flags(), type, name, fd.offset(), is_setter)); |
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737 return mname; |
710 | 738 } |
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739 default: |
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740 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty); |
710 | 741 } |
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742 |
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743 return empty; |
710 | 744 } |
745 | |
746 // Conversely, a member name which is only initialized from JVM internals | |
747 // may have null defc, name, and type fields. | |
748 // Resolving it plants a vmtarget/vmindex in it, | |
749 // which refers directly to JVM internals. | |
750 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) { | |
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751 assert(java_lang_invoke_MemberName::is_instance(mname()), ""); |
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752 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); |
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753 int vmindex = java_lang_invoke_MemberName::vmindex(mname()); |
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754 if (vmtarget == NULL) { |
710 | 755 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand"); |
756 } | |
757 | |
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758 bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != NULL); |
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759 bool have_name = (java_lang_invoke_MemberName::name(mname()) != NULL); |
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760 bool have_type = (java_lang_invoke_MemberName::type(mname()) != NULL); |
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761 int flags = java_lang_invoke_MemberName::flags(mname()); |
710 | 762 |
763 if (suppress != 0) { | |
764 if (suppress & _suppress_defc) have_defc = true; | |
765 if (suppress & _suppress_name) have_name = true; | |
766 if (suppress & _suppress_type) have_type = true; | |
767 } | |
768 | |
769 if (have_defc && have_name && have_type) return; // nothing needed | |
770 | |
771 switch (flags & ALL_KINDS) { | |
772 case IS_METHOD: | |
773 case IS_CONSTRUCTOR: | |
774 { | |
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775 assert(vmtarget->is_method(), "method or constructor vmtarget is Method*"); |
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776 methodHandle m(THREAD, (Method*)vmtarget); |
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777 DEBUG_ONLY(vmtarget = NULL); // safety |
710 | 778 if (m.is_null()) break; |
779 if (!have_defc) { | |
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780 InstanceKlass* defc = m->method_holder(); |
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781 java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror()); |
710 | 782 } |
783 if (!have_name) { | |
784 //not java_lang_String::create_from_symbol; let's intern member names | |
785 Handle name = StringTable::intern(m->name(), CHECK); | |
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786 java_lang_invoke_MemberName::set_name(mname(), name()); |
710 | 787 } |
788 if (!have_type) { | |
789 Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK); | |
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790 java_lang_invoke_MemberName::set_type(mname(), type()); |
710 | 791 } |
792 return; | |
793 } | |
794 case IS_FIELD: | |
795 { | |
796 // This is taken from LinkResolver::resolve_field, sans access checks. | |
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797 assert(vmtarget->is_klass(), "field vmtarget is Klass*"); |
6983 | 798 if (!((Klass*) vmtarget)->oop_is_instance()) break; |
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799 instanceKlassHandle defc(THREAD, (Klass*) vmtarget); |
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800 DEBUG_ONLY(vmtarget = NULL); // safety |
710 | 801 bool is_static = ((flags & JVM_ACC_STATIC) != 0); |
802 fieldDescriptor fd; // find_field initializes fd if found | |
803 if (!defc->find_field_from_offset(vmindex, is_static, &fd)) | |
804 break; // cannot expand | |
805 if (!have_defc) { | |
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806 java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror()); |
710 | 807 } |
808 if (!have_name) { | |
809 //not java_lang_String::create_from_symbol; let's intern member names | |
810 Handle name = StringTable::intern(fd.name(), CHECK); | |
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811 java_lang_invoke_MemberName::set_name(mname(), name()); |
710 | 812 } |
813 if (!have_type) { | |
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814 // If it is a primitive field type, don't mess with short strings like "I". |
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815 Handle type = field_signature_type_or_null(fd.signature()); |
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816 if (type.is_null()) { |
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817 java_lang_String::create_from_symbol(fd.signature(), CHECK); |
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818 } |
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819 java_lang_invoke_MemberName::set_type(mname(), type()); |
710 | 820 } |
821 return; | |
822 } | |
823 } | |
824 THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format"); | |
825 } | |
826 | |
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827 int MethodHandles::find_MemberNames(KlassHandle k, |
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828 Symbol* name, Symbol* sig, |
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829 int mflags, KlassHandle caller, |
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830 int skip, objArrayHandle results) { |
710 | 831 // %%% take caller into account! |
832 | |
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833 Thread* thread = Thread::current(); |
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834 |
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835 if (k.is_null() || !k->oop_is_instance()) return -1; |
710 | 836 |
837 int rfill = 0, rlimit = results->length(), rskip = skip; | |
838 // overflow measurement: | |
839 int overflow = 0, overflow_limit = MAX2(1000, rlimit); | |
840 | |
841 int match_flags = mflags; | |
842 bool search_superc = ((match_flags & SEARCH_SUPERCLASSES) != 0); | |
843 bool search_intfc = ((match_flags & SEARCH_INTERFACES) != 0); | |
844 bool local_only = !(search_superc | search_intfc); | |
845 bool classes_only = false; | |
846 | |
847 if (name != NULL) { | |
848 if (name->utf8_length() == 0) return 0; // a match is not possible | |
849 } | |
850 if (sig != NULL) { | |
851 if (sig->utf8_length() == 0) return 0; // a match is not possible | |
852 if (sig->byte_at(0) == '(') | |
853 match_flags &= ~(IS_FIELD | IS_TYPE); | |
854 else | |
855 match_flags &= ~(IS_CONSTRUCTOR | IS_METHOD); | |
856 } | |
857 | |
858 if ((match_flags & IS_TYPE) != 0) { | |
859 // NYI, and Core Reflection works quite well for this query | |
860 } | |
861 | |
862 if ((match_flags & IS_FIELD) != 0) { | |
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863 for (FieldStream st(k(), local_only, !search_intfc); !st.eos(); st.next()) { |
710 | 864 if (name != NULL && st.name() != name) |
865 continue; | |
866 if (sig != NULL && st.signature() != sig) | |
867 continue; | |
868 // passed the filters | |
869 if (rskip > 0) { | |
870 --rskip; | |
871 } else if (rfill < rlimit) { | |
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872 Handle result(thread, results->obj_at(rfill++)); |
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873 if (!java_lang_invoke_MemberName::is_instance(result())) |
710 | 874 return -99; // caller bug! |
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875 oop type = field_signature_type_or_null(st.signature()); |
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876 oop name = field_name_or_null(st.name()); |
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877 oop saved = MethodHandles::init_field_MemberName(result, st.klass(), |
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878 st.access_flags(), type, name, |
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879 st.offset()); |
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880 if (saved != result()) |
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881 results->obj_at_put(rfill-1, saved); // show saved instance to user |
710 | 882 } else if (++overflow >= overflow_limit) { |
883 match_flags = 0; break; // got tired of looking at overflow | |
884 } | |
885 } | |
886 } | |
887 | |
888 if ((match_flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) { | |
889 // watch out for these guys: | |
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890 Symbol* init_name = vmSymbols::object_initializer_name(); |
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891 Symbol* clinit_name = vmSymbols::class_initializer_name(); |
710 | 892 if (name == clinit_name) clinit_name = NULL; // hack for exposing <clinit> |
893 bool negate_name_test = false; | |
894 // fix name so that it captures the intention of IS_CONSTRUCTOR | |
895 if (!(match_flags & IS_METHOD)) { | |
896 // constructors only | |
897 if (name == NULL) { | |
898 name = init_name; | |
899 } else if (name != init_name) { | |
900 return 0; // no constructors of this method name | |
901 } | |
902 } else if (!(match_flags & IS_CONSTRUCTOR)) { | |
903 // methods only | |
904 if (name == NULL) { | |
905 name = init_name; | |
906 negate_name_test = true; // if we see the name, we *omit* the entry | |
907 } else if (name == init_name) { | |
908 return 0; // no methods of this constructor name | |
909 } | |
910 } else { | |
911 // caller will accept either sort; no need to adjust name | |
912 } | |
10133
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913 for (MethodStream st(k(), local_only, !search_intfc); !st.eos(); st.next()) { |
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914 Method* m = st.method(); |
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915 Symbol* m_name = m->name(); |
710 | 916 if (m_name == clinit_name) |
917 continue; | |
918 if (name != NULL && ((m_name != name) ^ negate_name_test)) | |
919 continue; | |
920 if (sig != NULL && m->signature() != sig) | |
921 continue; | |
922 // passed the filters | |
923 if (rskip > 0) { | |
924 --rskip; | |
925 } else if (rfill < rlimit) { | |
10133
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926 Handle result(thread, results->obj_at(rfill++)); |
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927 if (!java_lang_invoke_MemberName::is_instance(result())) |
710 | 928 return -99; // caller bug! |
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929 oop saved = MethodHandles::init_method_MemberName(result, m, true, NULL); |
10133
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930 if (saved != result()) |
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931 results->obj_at_put(rfill-1, saved); // show saved instance to user |
710 | 932 } else if (++overflow >= overflow_limit) { |
933 match_flags = 0; break; // got tired of looking at overflow | |
934 } | |
935 } | |
936 } | |
937 | |
938 // return number of elements we at leasted wanted to initialize | |
939 return rfill + overflow; | |
940 } | |
10133
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941 |
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942 //------------------------------------------------------------------------------ |
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943 // MemberNameTable |
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944 // |
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945 |
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946 MemberNameTable::MemberNameTable() : GrowableArray<jweak>(10, true) { |
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947 assert_locked_or_safepoint(MemberNameTable_lock); |
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948 } |
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949 |
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950 MemberNameTable::~MemberNameTable() { |
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951 assert_locked_or_safepoint(MemberNameTable_lock); |
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952 int len = this->length(); |
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953 |
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954 for (int idx = 0; idx < len; idx++) { |
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955 jweak ref = this->at(idx); |
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956 JNIHandles::destroy_weak_global(ref); |
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957 } |
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958 } |
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959 |
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960 // Return entry index if found, return -1 otherwise. |
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961 int MemberNameTable::find_member_name(oop mem_name) { |
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962 assert_locked_or_safepoint(MemberNameTable_lock); |
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963 int len = this->length(); |
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964 |
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965 for (int idx = 0; idx < len; idx++) { |
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966 jweak ref = this->at(idx); |
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967 oop entry = JNIHandles::resolve(ref); |
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968 if (entry == mem_name) { |
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969 return idx; |
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970 } |
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971 } |
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972 return -1; |
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973 } |
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974 |
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975 void MemberNameTable::add_member_name(jweak mem_name_wref) { |
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976 assert_locked_or_safepoint(MemberNameTable_lock); |
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977 oop mem_name = JNIHandles::resolve(mem_name_wref); |
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978 |
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979 // Each member name may appear just once: add only if not found |
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980 if (find_member_name(mem_name) == -1) { |
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981 this->append(mem_name_wref); |
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982 } |
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983 } |
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984 |
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985 #if INCLUDE_JVMTI |
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986 oop MemberNameTable::find_member_name_by_method(Method* old_method) { |
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987 assert_locked_or_safepoint(MemberNameTable_lock); |
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988 oop found = NULL; |
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989 int len = this->length(); |
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990 |
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991 for (int idx = 0; idx < len; idx++) { |
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992 oop mem_name = JNIHandles::resolve(this->at(idx)); |
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993 if (mem_name == NULL) { |
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994 continue; |
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995 } |
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996 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mem_name); |
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997 if (method == old_method) { |
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998 found = mem_name; |
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999 break; |
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1000 } |
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1001 } |
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1002 return found; |
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1003 } |
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1004 |
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1005 // It is called at safepoint only |
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1006 void MemberNameTable::adjust_method_entries(Method** old_methods, Method** new_methods, |
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1007 int methods_length, bool *trace_name_printed) { |
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1008 assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint"); |
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1009 // search the MemberNameTable for uses of either obsolete or EMCP methods |
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1010 for (int j = 0; j < methods_length; j++) { |
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1011 Method* old_method = old_methods[j]; |
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1012 Method* new_method = new_methods[j]; |
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1013 oop mem_name = find_member_name_by_method(old_method); |
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1014 if (mem_name != NULL) { |
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1015 java_lang_invoke_MemberName::adjust_vmtarget(mem_name, new_method); |
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1016 |
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1017 if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
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1018 if (!(*trace_name_printed)) { |
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1019 // RC_TRACE_MESG macro has an embedded ResourceMark |
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1020 RC_TRACE_MESG(("adjust: name=%s", |
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1021 old_method->method_holder()->external_name())); |
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1022 *trace_name_printed = true; |
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1023 } |
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1024 // RC_TRACE macro has an embedded ResourceMark |
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1025 RC_TRACE(0x00400000, ("MemberName method update: %s(%s)", |
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1026 new_method->name()->as_C_string(), |
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1027 new_method->signature()->as_C_string())); |
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1028 } |
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1029 } |
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1030 } |
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1031 } |
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1032 #endif // INCLUDE_JVMTI |
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1033 |
710 | 1034 // |
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1035 // Here are the native methods in java.lang.invoke.MethodHandleNatives |
710 | 1036 // They are the private interface between this JVM and the HotSpot-specific |
1037 // Java code that implements JSR 292 method handles. | |
1038 // | |
1039 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way | |
1040 // that intrinsic (non-JNI) native methods are defined in HotSpot. | |
1041 // | |
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1042 |
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1043 JVM_ENTRY(jint, MHN_getConstant(JNIEnv *env, jobject igcls, jint which)) { |
710 | 1044 switch (which) { |
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1045 case MethodHandles::GC_COUNT_GWT: |
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1046 #ifdef COMPILER2 |
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1047 return true; |
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1048 #else |
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1049 return false; |
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1050 #endif |
710 | 1051 } |
1052 return 0; | |
1053 } | |
1054 JVM_END | |
1055 | |
1056 #ifndef PRODUCT | |
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1057 #define EACH_NAMED_CON(template, requirement) \ |
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1058 template(MethodHandles,GC_COUNT_GWT) \ |
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1059 template(java_lang_invoke_MemberName,MN_IS_METHOD) \ |
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1060 template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \ |
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1061 template(java_lang_invoke_MemberName,MN_IS_FIELD) \ |
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1062 template(java_lang_invoke_MemberName,MN_IS_TYPE) \ |
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1063 template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \ |
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1064 template(java_lang_invoke_MemberName,MN_SEARCH_SUPERCLASSES) \ |
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1065 template(java_lang_invoke_MemberName,MN_SEARCH_INTERFACES) \ |
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1066 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \ |
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1067 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \ |
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1068 template(MethodHandles,GC_LAMBDA_SUPPORT) \ |
710 | 1069 /*end*/ |
1070 | |
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1071 #define IGNORE_REQ(req_expr) /* req_expr */ |
710 | 1072 #define ONE_PLUS(scope,value) 1+ |
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1073 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0; |
710 | 1074 #define VALUE_COMMA(scope,value) scope::value, |
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1075 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 }; |
710 | 1076 #define STRING_NULL(scope,value) #value "\0" |
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1077 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) }; |
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1078 |
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1079 static bool advertise_con_value(int which) { |
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1080 if (which < 0) return false; |
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1081 bool ok = true; |
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1082 int count = 0; |
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1083 #define INC_COUNT(scope,value) \ |
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1084 ++count; |
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1085 #define CHECK_REQ(req_expr) \ |
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1086 if (which < count) return ok; \ |
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1087 ok = (req_expr); |
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1088 EACH_NAMED_CON(INC_COUNT, CHECK_REQ); |
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1089 #undef INC_COUNT |
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1090 #undef CHECK_REQ |
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1091 assert(count == con_value_count, ""); |
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1092 if (which < count) return ok; |
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1093 return false; |
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1094 } |
710 | 1095 |
1096 #undef ONE_PLUS | |
1097 #undef VALUE_COMMA | |
1098 #undef STRING_NULL | |
1099 #undef EACH_NAMED_CON | |
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1100 #endif // PRODUCT |
710 | 1101 |
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1102 JVM_ENTRY(jint, MHN_getNamedCon(JNIEnv *env, jobject igcls, jint which, jobjectArray box_jh)) { |
710 | 1103 #ifndef PRODUCT |
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1104 if (advertise_con_value(which)) { |
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1105 assert(which >= 0 && which < con_value_count, ""); |
710 | 1106 int con = con_values[which]; |
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1107 objArrayHandle box(THREAD, (objArrayOop) JNIHandles::resolve(box_jh)); |
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1108 if (box.not_null() && box->klass() == Universe::objectArrayKlassObj() && box->length() > 0) { |
710 | 1109 const char* str = &con_names[0]; |
1110 for (int i = 0; i < which; i++) | |
1111 str += strlen(str) + 1; // skip name and null | |
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1112 oop name = java_lang_String::create_oop_from_str(str, CHECK_0); // possible safepoint |
710 | 1113 box->obj_at_put(0, name); |
1114 } | |
1115 return con; | |
1116 } | |
1117 #endif | |
1118 return 0; | |
1119 } | |
1120 JVM_END | |
1121 | |
1122 // void init(MemberName self, AccessibleObject ref) | |
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1123 JVM_ENTRY(void, MHN_init_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jobject target_jh)) { |
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1124 if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } |
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1125 if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } |
710 | 1126 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
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1127 Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); |
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1128 MethodHandles::init_MemberName(mname, target); |
710 | 1129 } |
1130 JVM_END | |
1131 | |
1132 // void expand(MemberName self) | |
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1133 JVM_ENTRY(void, MHN_expand_Mem(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
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1134 if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } |
710 | 1135 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
1136 MethodHandles::expand_MemberName(mname, 0, CHECK); | |
1137 } | |
1138 JVM_END | |
1139 | |
1140 // void resolve(MemberName self, Class<?> caller) | |
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1141 JVM_ENTRY(jobject, MHN_resolve_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jclass caller_jh)) { |
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1142 if (mname_jh == NULL) { THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "mname is null"); } |
710 | 1143 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
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1144 |
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1145 // The trusted Java code that calls this method should already have performed |
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1146 // access checks on behalf of the given caller. But, we can verify this. |
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1147 if (VerifyMethodHandles && caller_jh != NULL && |
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1148 java_lang_invoke_MemberName::clazz(mname()) != NULL) { |
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1149 Klass* reference_klass = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); |
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1150 if (reference_klass != NULL) { |
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1151 // Emulate LinkResolver::check_klass_accessability. |
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1152 Klass* caller = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh)); |
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1153 if (!Reflection::verify_class_access(caller, |
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1154 reference_klass, |
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1155 true)) { |
6983 | 1156 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), reference_klass->external_name()); |
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1157 } |
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1158 } |
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1159 } |
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1160 |
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1161 Handle resolved = MethodHandles::resolve_MemberName(mname, CHECK_NULL); |
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1162 if (resolved.is_null()) { |
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1163 int flags = java_lang_invoke_MemberName::flags(mname()); |
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1164 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; |
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1165 if (!MethodHandles::ref_kind_is_valid(ref_kind)) { |
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1166 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format"); |
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1167 } |
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1168 if ((flags & ALL_KINDS) == IS_FIELD) { |
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1169 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "field resolution failed"); |
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1170 } else if ((flags & ALL_KINDS) == IS_METHOD || |
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1171 (flags & ALL_KINDS) == IS_CONSTRUCTOR) { |
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1172 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "method resolution failed"); |
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1173 } else { |
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1174 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed"); |
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1175 } |
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1176 } |
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1177 |
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1178 return JNIHandles::make_local(THREAD, resolved()); |
710 | 1179 } |
1180 JVM_END | |
1181 | |
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1182 static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) { |
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1183 if (mname == NULL || |
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1184 java_lang_invoke_MemberName::vmtarget(mname) == NULL) { |
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1185 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved"); |
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1186 } else { |
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1187 int flags = java_lang_invoke_MemberName::flags(mname); |
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1188 if ((flags & IS_FIELD) != 0 && |
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1189 (must_be_static |
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1190 ? (flags & JVM_ACC_STATIC) != 0 |
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1191 : (flags & JVM_ACC_STATIC) == 0)) { |
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1192 int vmindex = java_lang_invoke_MemberName::vmindex(mname); |
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1193 return (jlong) vmindex; |
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1194 } |
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1195 } |
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1196 const char* msg = (must_be_static ? "static field required" : "non-static field required"); |
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1197 THROW_MSG_0(vmSymbols::java_lang_InternalError(), msg); |
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1198 return 0; |
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1199 } |
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1200 |
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1201 JVM_ENTRY(jlong, MHN_objectFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
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1202 return find_member_field_offset(JNIHandles::resolve(mname_jh), false, THREAD); |
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1203 } |
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1204 JVM_END |
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1205 |
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1206 JVM_ENTRY(jlong, MHN_staticFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
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1207 return find_member_field_offset(JNIHandles::resolve(mname_jh), true, THREAD); |
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1208 } |
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1209 JVM_END |
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1210 |
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1211 JVM_ENTRY(jobject, MHN_staticFieldBase(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
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1212 // use the other function to perform sanity checks: |
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1213 jlong ignore = find_member_field_offset(JNIHandles::resolve(mname_jh), true, CHECK_NULL); |
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1214 oop clazz = java_lang_invoke_MemberName::clazz(JNIHandles::resolve_non_null(mname_jh)); |
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1215 return JNIHandles::make_local(THREAD, clazz); |
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1216 } |
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1217 JVM_END |
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1218 |
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1219 JVM_ENTRY(jobject, MHN_getMemberVMInfo(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
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1220 if (mname_jh == NULL) return NULL; |
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1221 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
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1222 intptr_t vmindex = java_lang_invoke_MemberName::vmindex(mname()); |
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1223 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); |
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1224 objArrayHandle result = oopFactory::new_objArray(SystemDictionary::Object_klass(), 2, CHECK_NULL); |
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1225 jvalue vmindex_value; vmindex_value.j = (long)vmindex; |
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1226 oop x = java_lang_boxing_object::create(T_LONG, &vmindex_value, CHECK_NULL); |
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1227 result->obj_at_put(0, x); |
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1228 x = NULL; |
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1229 if (vmtarget == NULL) { |
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1230 x = NULL; |
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1231 } else if (vmtarget->is_klass()) { |
6983 | 1232 x = ((Klass*) vmtarget)->java_mirror(); |
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1233 } else if (vmtarget->is_method()) { |
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1234 Handle mname2 = MethodHandles::new_MemberName(CHECK_NULL); |
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1235 x = MethodHandles::init_method_MemberName(mname2, (Method*)vmtarget, false, NULL); |
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1236 } |
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1237 result->obj_at_put(1, x); |
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1238 return JNIHandles::make_local(env, result()); |
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1239 } |
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1240 JVM_END |
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1241 |
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1242 |
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1243 |
710 | 1244 // static native int getMembers(Class<?> defc, String matchName, String matchSig, |
1245 // int matchFlags, Class<?> caller, int skip, MemberName[] results); | |
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1246 JVM_ENTRY(jint, MHN_getMembers(JNIEnv *env, jobject igcls, |
710 | 1247 jclass clazz_jh, jstring name_jh, jstring sig_jh, |
1248 int mflags, jclass caller_jh, jint skip, jobjectArray results_jh)) { | |
1249 if (clazz_jh == NULL || results_jh == NULL) return -1; | |
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1250 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz_jh))); |
710 | 1251 |
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1252 objArrayHandle results(THREAD, (objArrayOop) JNIHandles::resolve(results_jh)); |
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1253 if (results.is_null() || !results->is_objArray()) return -1; |
710 | 1254 |
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1255 TempNewSymbol name = NULL; |
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1256 TempNewSymbol sig = NULL; |
710 | 1257 if (name_jh != NULL) { |
1258 name = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(name_jh)); | |
1259 if (name == NULL) return 0; // a match is not possible | |
1260 } | |
1261 if (sig_jh != NULL) { | |
1262 sig = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(sig_jh)); | |
1263 if (sig == NULL) return 0; // a match is not possible | |
1264 } | |
1265 | |
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1266 KlassHandle caller; |
710 | 1267 if (caller_jh != NULL) { |
1268 oop caller_oop = JNIHandles::resolve_non_null(caller_jh); | |
1269 if (!java_lang_Class::is_instance(caller_oop)) return -1; | |
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1270 caller = KlassHandle(THREAD, java_lang_Class::as_Klass(caller_oop)); |
710 | 1271 } |
1272 | |
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1273 if (name != NULL && sig != NULL && results.not_null()) { |
710 | 1274 // try a direct resolve |
1275 // %%% TO DO | |
1276 } | |
1277 | |
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1278 int res = MethodHandles::find_MemberNames(k, name, sig, mflags, |
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1279 caller, skip, results); |
710 | 1280 // TO DO: expand at least some of the MemberNames, to avoid massive callbacks |
1281 return res; | |
1282 } | |
1283 JVM_END | |
1284 | |
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1285 JVM_ENTRY(void, MHN_setCallSiteTargetNormal(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) { |
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1286 Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh)); |
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1287 Handle target (THREAD, JNIHandles::resolve(target_jh)); |
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1288 { |
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1289 // Walk all nmethods depending on this call site. |
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1290 MutexLocker mu(Compile_lock, thread); |
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1291 Universe::flush_dependents_on(call_site, target); |
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1292 java_lang_invoke_CallSite::set_target(call_site(), target()); |
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1293 } |
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1294 } |
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1295 JVM_END |
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1296 |
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1297 JVM_ENTRY(void, MHN_setCallSiteTargetVolatile(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) { |
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1298 Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh)); |
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1299 Handle target (THREAD, JNIHandles::resolve(target_jh)); |
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1300 { |
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1301 // Walk all nmethods depending on this call site. |
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1302 MutexLocker mu(Compile_lock, thread); |
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1303 Universe::flush_dependents_on(call_site, target); |
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1304 java_lang_invoke_CallSite::set_target_volatile(call_site(), target()); |
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1305 } |
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1306 } |
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1307 JVM_END |
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1308 |
710 | 1309 /// JVM_RegisterMethodHandleMethods |
1310 | |
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1311 #undef CS // Solaris builds complain |
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1312 |
710 | 1313 #define LANG "Ljava/lang/" |
2460 | 1314 #define JLINV "Ljava/lang/invoke/" |
710 | 1315 |
1316 #define OBJ LANG"Object;" | |
1317 #define CLS LANG"Class;" | |
1318 #define STRG LANG"String;" | |
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1319 #define CS JLINV"CallSite;" |
2460 | 1320 #define MT JLINV"MethodType;" |
1321 #define MH JLINV"MethodHandle;" | |
1322 #define MEM JLINV"MemberName;" | |
710 | 1323 |
1324 #define CC (char*) /*cast a literal from (const char*)*/ | |
1325 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1326 | |
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1327 // These are the native methods on java.lang.invoke.MethodHandleNatives. |
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1328 static JNINativeMethod required_methods_JDK8[] = { |
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1329 {CC"init", CC"("MEM""OBJ")V", FN_PTR(MHN_init_Mem)}, |
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1330 {CC"expand", CC"("MEM")V", FN_PTR(MHN_expand_Mem)}, |
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1331 {CC"resolve", CC"("MEM""CLS")"MEM, FN_PTR(MHN_resolve_Mem)}, |
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1332 {CC"getConstant", CC"(I)I", FN_PTR(MHN_getConstant)}, |
710 | 1333 // static native int getNamedCon(int which, Object[] name) |
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1334 {CC"getNamedCon", CC"(I["OBJ")I", FN_PTR(MHN_getNamedCon)}, |
710 | 1335 // static native int getMembers(Class<?> defc, String matchName, String matchSig, |
1336 // int matchFlags, Class<?> caller, int skip, MemberName[] results); | |
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1337 {CC"getMembers", CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHN_getMembers)}, |
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1338 {CC"objectFieldOffset", CC"("MEM")J", FN_PTR(MHN_objectFieldOffset)}, |
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1339 {CC"setCallSiteTargetNormal", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetNormal)}, |
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1340 {CC"setCallSiteTargetVolatile", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetVolatile)}, |
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1341 {CC"staticFieldOffset", CC"("MEM")J", FN_PTR(MHN_staticFieldOffset)}, |
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1342 {CC"staticFieldBase", CC"("MEM")"OBJ, FN_PTR(MHN_staticFieldBase)}, |
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1343 {CC"getMemberVMInfo", CC"("MEM")"OBJ, FN_PTR(MHN_getMemberVMInfo)} |
710 | 1344 }; |
1345 | |
1346 // This one function is exported, used by NativeLookup. | |
1347 | |
1348 JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) { | |
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1349 if (!EnableInvokeDynamic) { |
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1350 warning("JSR 292 is disabled in this JVM. Use -XX:+UnlockDiagnosticVMOptions -XX:+EnableInvokeDynamic to enable."); |
710 | 1351 return; // bind nothing |
1352 } | |
1353 | |
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1354 assert(!MethodHandles::enabled(), "must not be enabled"); |
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1355 bool enable_MH = true; |
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1356 |
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1357 jclass MH_class = NULL; |
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1358 if (SystemDictionary::MethodHandle_klass() == NULL) { |
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1359 enable_MH = false; |
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1360 } else { |
6983 | 1361 oop mirror = SystemDictionary::MethodHandle_klass()->java_mirror(); |
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1362 MH_class = (jclass) JNIHandles::make_local(env, mirror); |
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1363 } |
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1364 |
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1365 int status; |
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1366 |
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1367 if (enable_MH) { |
710 | 1368 ThreadToNativeFromVM ttnfv(thread); |
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1369 |
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1370 status = env->RegisterNatives(MHN_class, required_methods_JDK8, sizeof(required_methods_JDK8)/sizeof(JNINativeMethod)); |
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1371 if (status != JNI_OK || env->ExceptionOccurred()) { |
2460 | 1372 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); |
1373 enable_MH = false; | |
710 | 1374 env->ExceptionClear(); |
1375 } | |
1376 } | |
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1377 |
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1378 if (TraceInvokeDynamic) { |
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1379 tty->print_cr("MethodHandle support loaded (using LambdaForms)"); |
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1380 } |
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1381 |
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1382 if (enable_MH) { |
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1383 MethodHandles::generate_adapters(); |
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1384 MethodHandles::set_enabled(true); |
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1385 } |
710 | 1386 } |
1387 JVM_END |