Mercurial > hg > truffle
annotate src/share/vm/interpreter/linkResolver.cpp @ 6940:18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
Summary: Change types of above methods and field to InstanceKlass and remove unneeded casts from the source files.
Reviewed-by: dholmes, coleenp, zgu
Contributed-by: harold.seigel@oracle.com
| author | coleenp |
|---|---|
| date | Tue, 06 Nov 2012 15:09:37 -0500 |
| parents | 4735d2c84362 |
| children | 070d523b96a7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 6934 | 26 #include "classfile/defaultMethods.hpp" |
| 1972 | 27 #include "classfile/systemDictionary.hpp" |
| 28 #include "classfile/vmSymbols.hpp" | |
| 29 #include "compiler/compileBroker.hpp" | |
| 30 #include "gc_interface/collectedHeap.inline.hpp" | |
| 31 #include "interpreter/bytecode.hpp" | |
| 32 #include "interpreter/interpreterRuntime.hpp" | |
| 33 #include "interpreter/linkResolver.hpp" | |
| 34 #include "memory/resourceArea.hpp" | |
| 35 #include "memory/universe.inline.hpp" | |
| 36 #include "oops/instanceKlass.hpp" | |
| 37 #include "oops/objArrayOop.hpp" | |
| 38 #include "prims/methodHandles.hpp" | |
| 39 #include "prims/nativeLookup.hpp" | |
| 40 #include "runtime/compilationPolicy.hpp" | |
| 41 #include "runtime/fieldDescriptor.hpp" | |
| 42 #include "runtime/frame.inline.hpp" | |
| 43 #include "runtime/handles.inline.hpp" | |
| 44 #include "runtime/reflection.hpp" | |
| 45 #include "runtime/signature.hpp" | |
| 46 #include "runtime/vmThread.hpp" | |
| 47 #ifdef TARGET_OS_FAMILY_linux | |
| 48 # include "thread_linux.inline.hpp" | |
| 49 #endif | |
| 50 #ifdef TARGET_OS_FAMILY_solaris | |
| 51 # include "thread_solaris.inline.hpp" | |
| 52 #endif | |
| 53 #ifdef TARGET_OS_FAMILY_windows | |
| 54 # include "thread_windows.inline.hpp" | |
| 55 #endif | |
| 3960 | 56 #ifdef TARGET_OS_FAMILY_bsd |
| 57 # include "thread_bsd.inline.hpp" | |
| 58 #endif | |
| 0 | 59 |
| 60 //------------------------------------------------------------------------------------------------------------------------ | |
| 61 // Implementation of FieldAccessInfo | |
| 62 | |
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63 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset, |
| 0 | 64 BasicType field_type, AccessFlags access_flags) { |
| 65 _klass = klass; | |
| 66 _name = name; | |
| 67 _field_index = field_index; | |
| 68 _field_offset = field_offset; | |
| 69 _field_type = field_type; | |
| 70 _access_flags = access_flags; | |
| 71 } | |
| 72 | |
| 73 | |
| 74 //------------------------------------------------------------------------------------------------------------------------ | |
| 75 // Implementation of CallInfo | |
| 76 | |
| 77 | |
| 78 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) { | |
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79 int vtable_index = Method::nonvirtual_vtable_index; |
| 0 | 80 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); |
| 81 } | |
| 82 | |
| 83 | |
| 84 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) { | |
| 85 // This is only called for interface methods. If the resolved_method | |
| 86 // comes from java/lang/Object, it can be the subject of a virtual call, so | |
| 87 // we should pick the vtable index from the resolved method. | |
| 88 // Other than that case, there is no valid vtable index to specify. | |
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89 int vtable_index = Method::invalid_vtable_index; |
| 1142 | 90 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) { |
| 0 | 91 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check"); |
| 92 vtable_index = resolved_method->vtable_index(); | |
| 93 } | |
| 94 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); | |
| 95 } | |
| 96 | |
| 97 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { | |
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98 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index"); |
| 0 | 99 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); |
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100 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call"); |
| 0 | 101 } |
| 102 | |
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103 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) { |
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104 if (resolved_method.is_null()) { |
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105 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null"); |
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106 } |
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107 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass(); |
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108 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic || |
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109 resolved_method->is_compiled_lambda_form(), |
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110 "linkMethod must return one of these"); |
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111 int vtable_index = Method::nonvirtual_vtable_index; |
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112 assert(resolved_method->vtable_index() == vtable_index, ""); |
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113 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); |
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114 _resolved_appendix = resolved_appendix; |
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115 _resolved_method_type = resolved_method_type; |
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116 } |
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117 |
| 0 | 118 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { |
| 119 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond"); | |
| 120 _resolved_klass = resolved_klass; | |
| 121 _selected_klass = selected_klass; | |
| 122 _resolved_method = resolved_method; | |
| 123 _selected_method = selected_method; | |
| 124 _vtable_index = vtable_index; | |
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125 _resolved_appendix = Handle(); |
| 1783 | 126 if (CompilationPolicy::must_be_compiled(selected_method)) { |
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127 // This path is unusual, mostly used by the '-Xcomp' stress test mode. |
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128 |
| 1783 | 129 // Note: with several active threads, the must_be_compiled may be true |
| 130 // while can_be_compiled is false; remove assert | |
| 131 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile"); | |
| 0 | 132 if (THREAD->is_Compiler_thread()) { |
| 133 // don't force compilation, resolve was on behalf of compiler | |
| 134 return; | |
| 135 } | |
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136 if (selected_method->method_holder()->is_not_initialized()) { |
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137 // 'is_not_initialized' means not only '!is_initialized', but also that |
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138 // initialization has not been started yet ('!being_initialized') |
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139 // Do not force compilation of methods in uninitialized classes. |
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140 // Note that doing this would throw an assert later, |
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141 // in CompileBroker::compile_method. |
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142 // We sometimes use the link resolver to do reflective lookups |
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143 // even before classes are initialized. |
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144 return; |
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145 } |
| 0 | 146 CompileBroker::compile_method(selected_method, InvocationEntryBci, |
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147 CompilationPolicy::policy()->initial_compile_level(), |
| 1783 | 148 methodHandle(), 0, "must_be_compiled", CHECK); |
| 0 | 149 } |
| 150 } | |
| 151 | |
| 152 | |
| 153 //------------------------------------------------------------------------------------------------------------------------ | |
| 154 // Klass resolution | |
| 155 | |
| 156 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) { | |
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157 if (!Reflection::verify_class_access(ref_klass(), |
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158 sel_klass(), |
| 0 | 159 true)) { |
| 160 ResourceMark rm(THREAD); | |
| 161 Exceptions::fthrow( | |
| 162 THREAD_AND_LOCATION, | |
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163 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 164 "tried to access class %s from class %s", |
| 165 sel_klass->external_name(), | |
| 166 ref_klass->external_name() | |
| 167 ); | |
| 168 return; | |
| 169 } | |
| 170 } | |
| 171 | |
| 172 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { | |
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173 Klass* result_oop = pool->klass_ref_at(index, CHECK); |
| 0 | 174 result = KlassHandle(THREAD, result_oop); |
| 175 } | |
| 176 | |
| 177 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { | |
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178 Klass* result_oop = |
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179 ConstantPool::klass_ref_at_if_loaded_check(pool, index, CHECK); |
| 0 | 180 result = KlassHandle(THREAD, result_oop); |
| 181 } | |
| 182 | |
| 183 | |
| 184 //------------------------------------------------------------------------------------------------------------------------ | |
| 185 // Method resolution | |
| 186 // | |
| 187 // According to JVM spec. $5.4.3c & $5.4.3d | |
| 188 | |
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189 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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190 Method* result_oop = klass->uncached_lookup_method(name, signature); |
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191 if (EnableInvokeDynamic && result_oop != NULL) { |
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192 vmIntrinsics::ID iid = result_oop->intrinsic_id(); |
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193 if (MethodHandles::is_signature_polymorphic(iid)) { |
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194 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method. |
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195 return; |
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196 } |
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197 } |
| 0 | 198 result = methodHandle(THREAD, result_oop); |
| 199 } | |
| 200 | |
| 201 // returns first instance method | |
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202 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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203 Method* result_oop = klass->uncached_lookup_method(name, signature); |
| 0 | 204 result = methodHandle(THREAD, result_oop); |
| 205 while (!result.is_null() && result->is_static()) { | |
| 206 klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super()); | |
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207 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature)); |
| 0 | 208 } |
| 209 } | |
| 210 | |
| 211 | |
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212 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
| 0 | 213 ResourceMark rm(THREAD); |
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214 klassVtable *vt = InstanceKlass::cast(klass())->vtable(); |
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215 return vt->index_of_miranda(name, signature); |
| 0 | 216 } |
| 217 | |
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218 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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219 InstanceKlass *ik = InstanceKlass::cast(klass()); |
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220 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature)); |
| 0 | 221 } |
| 222 | |
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223 void LinkResolver::lookup_polymorphic_method(methodHandle& result, |
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224 KlassHandle klass, Symbol* name, Symbol* full_signature, |
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225 KlassHandle current_klass, |
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226 Handle *appendix_result_or_null, |
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227 Handle *method_type_result, |
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228 TRAPS) { |
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229 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name); |
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230 if (TraceMethodHandles) { |
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231 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s", |
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232 vmIntrinsics::name_at(iid), klass->external_name(), |
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233 name->as_C_string(), full_signature->as_C_string()); |
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234 } |
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235 if (EnableInvokeDynamic && |
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236 klass() == SystemDictionary::MethodHandle_klass() && |
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237 iid != vmIntrinsics::_none) { |
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238 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) { |
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239 // Most of these do not need an up-call to Java to resolve, so can be done anywhere. |
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240 // Do not erase last argument type (MemberName) if it is a static linkTo method. |
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241 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid); |
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242 TempNewSymbol basic_signature = |
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243 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK); |
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244 if (TraceMethodHandles) { |
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245 tty->print_cr("lookup_polymorphic_method %s %s => basic %s", |
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246 name->as_C_string(), |
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247 full_signature->as_C_string(), |
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248 basic_signature->as_C_string()); |
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249 } |
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250 result = SystemDictionary::find_method_handle_intrinsic(iid, |
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251 basic_signature, |
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252 CHECK); |
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253 if (result.not_null()) { |
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254 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic"); |
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255 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this"); |
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256 assert(basic_signature == result->signature(), "predict the result signature"); |
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257 if (TraceMethodHandles) { |
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258 tty->print("lookup_polymorphic_method => intrinsic "); |
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259 result->print_on(tty); |
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260 } |
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261 return; |
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262 } |
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263 } else if (iid == vmIntrinsics::_invokeGeneric |
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264 && !THREAD->is_Compiler_thread() |
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265 && appendix_result_or_null != NULL) { |
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266 // This is a method with type-checking semantics. |
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267 // We will ask Java code to spin an adapter method for it. |
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268 if (!MethodHandles::enabled()) { |
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269 // Make sure the Java part of the runtime has been booted up. |
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270 Klass* natives = SystemDictionary::MethodHandleNatives_klass(); |
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271 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) { |
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272 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(), |
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273 Handle(), |
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274 Handle(), |
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275 true, |
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276 CHECK); |
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277 } |
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278 } |
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279 |
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280 Handle appendix; |
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281 Handle method_type; |
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282 result = SystemDictionary::find_method_handle_invoker(name, |
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283 full_signature, |
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284 current_klass, |
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285 &appendix, |
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286 &method_type, |
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287 CHECK); |
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288 if (TraceMethodHandles) { |
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289 tty->print("lookup_polymorphic_method => (via Java) "); |
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290 result->print_on(tty); |
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291 tty->print(" lookup_polymorphic_method => appendix = "); |
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292 if (appendix.is_null()) tty->print_cr("(none)"); |
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293 else appendix->print_on(tty); |
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294 } |
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295 if (result.not_null()) { |
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296 #ifdef ASSERT |
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297 TempNewSymbol basic_signature = |
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298 MethodHandles::lookup_basic_type_signature(full_signature, CHECK); |
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299 int actual_size_of_params = result->size_of_parameters(); |
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300 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size(); |
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301 // +1 for MethodHandle.this, +1 for trailing MethodType |
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302 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1; |
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303 if (appendix.not_null()) expected_size_of_params += 1; |
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304 if (actual_size_of_params != expected_size_of_params) { |
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305 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string()); |
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306 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid)); |
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307 result->print(); |
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308 } |
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309 assert(actual_size_of_params == expected_size_of_params, |
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310 err_msg("%d != %d", actual_size_of_params, expected_size_of_params)); |
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311 #endif //ASSERT |
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312 |
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313 assert(appendix_result_or_null != NULL, ""); |
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314 (*appendix_result_or_null) = appendix; |
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315 (*method_type_result) = method_type; |
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316 return; |
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317 } |
| 710 | 318 } |
| 319 } | |
| 320 } | |
| 321 | |
| 0 | 322 void LinkResolver::check_method_accessability(KlassHandle ref_klass, |
| 323 KlassHandle resolved_klass, | |
| 324 KlassHandle sel_klass, | |
| 325 methodHandle sel_method, | |
| 326 TRAPS) { | |
| 327 | |
| 328 AccessFlags flags = sel_method->access_flags(); | |
| 329 | |
| 330 // Special case: arrays always override "clone". JVMS 2.15. | |
| 331 // If the resolved klass is an array class, and the declaring class | |
| 332 // is java.lang.Object and the method is "clone", set the flags | |
| 333 // to public. | |
| 334 // | |
| 335 // We'll check for the method name first, as that's most likely | |
| 336 // to be false (so we'll short-circuit out of these tests). | |
| 337 if (sel_method->name() == vmSymbols::clone_name() && | |
| 1142 | 338 sel_klass() == SystemDictionary::Object_klass() && |
| 0 | 339 resolved_klass->oop_is_array()) { |
| 340 // We need to change "protected" to "public". | |
| 341 assert(flags.is_protected(), "clone not protected?"); | |
| 342 jint new_flags = flags.as_int(); | |
| 343 new_flags = new_flags & (~JVM_ACC_PROTECTED); | |
| 344 new_flags = new_flags | JVM_ACC_PUBLIC; | |
| 345 flags.set_flags(new_flags); | |
| 346 } | |
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347 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument"); |
| 0 | 348 |
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349 if (!Reflection::verify_field_access(ref_klass(), |
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350 resolved_klass(), |
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351 sel_klass(), |
| 0 | 352 flags, |
| 353 true)) { | |
| 354 ResourceMark rm(THREAD); | |
| 355 Exceptions::fthrow( | |
| 356 THREAD_AND_LOCATION, | |
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357 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 358 "tried to access method %s.%s%s from class %s", |
| 359 sel_klass->external_name(), | |
| 360 sel_method->name()->as_C_string(), | |
| 361 sel_method->signature()->as_C_string(), | |
| 362 ref_klass->external_name() | |
| 363 ); | |
| 364 return; | |
| 365 } | |
| 366 } | |
| 367 | |
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368 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass, |
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369 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) { |
| 0 | 370 |
| 371 // resolve klass | |
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372 if (code == Bytecodes::_invokedynamic) { |
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373 resolved_klass = SystemDictionary::MethodHandle_klass(); |
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374 Symbol* method_name = vmSymbols::invoke_name(); |
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375 Symbol* method_signature = pool->signature_ref_at(index); |
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376 KlassHandle current_klass(THREAD, pool->pool_holder()); |
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377 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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378 return; |
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379 } |
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380 |
| 0 | 381 resolve_klass(resolved_klass, pool, index, CHECK); |
| 382 | |
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383 Symbol* method_name = pool->name_ref_at(index); |
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384 Symbol* method_signature = pool->signature_ref_at(index); |
| 0 | 385 KlassHandle current_klass(THREAD, pool->pool_holder()); |
| 386 | |
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387 if (pool->has_preresolution() |
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388 || (resolved_klass() == SystemDictionary::MethodHandle_klass() && |
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389 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) { |
|
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390 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index); |
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391 if (result_oop != NULL) { |
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392 resolved_method = methodHandle(THREAD, result_oop); |
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393 return; |
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394 } |
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395 } |
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396 |
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397 if (code == Bytecodes::_invokeinterface) { |
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398 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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399 } else { |
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400 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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401 } |
| 0 | 402 } |
| 403 | |
| 404 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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405 Symbol* method_name, Symbol* method_signature, |
| 0 | 406 KlassHandle current_klass, bool check_access, TRAPS) { |
| 407 | |
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408 Handle nested_exception; |
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409 |
| 6934 | 410 // 1. lookup method in resolved klass and its super klasses |
| 0 | 411 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); |
| 412 | |
| 413 if (resolved_method.is_null()) { // not found in the class hierarchy | |
| 6934 | 414 // 2. lookup method in all the interfaces implemented by the resolved klass |
| 0 | 415 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); |
| 416 | |
| 417 if (resolved_method.is_null()) { | |
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418 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc |
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419 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature, |
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420 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD); |
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421 if (HAS_PENDING_EXCEPTION) { |
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422 nested_exception = Handle(THREAD, PENDING_EXCEPTION); |
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423 CLEAR_PENDING_EXCEPTION; |
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424 } |
| 710 | 425 } |
| 426 | |
| 427 if (resolved_method.is_null()) { | |
| 6934 | 428 // 3. method lookup failed |
| 0 | 429 ResourceMark rm(THREAD); |
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430 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(), |
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431 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
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432 method_name, |
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433 method_signature), |
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434 nested_exception); |
| 0 | 435 } |
| 436 } | |
| 437 | |
| 6934 | 438 // 4. check if klass is not interface |
| 439 if (resolved_klass->is_interface() && resolved_method->is_abstract()) { | |
| 440 ResourceMark rm(THREAD); | |
| 441 char buf[200]; | |
| 442 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", | |
| 443 resolved_klass()->external_name()); | |
| 444 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 445 } | |
| 446 | |
| 0 | 447 // 5. check if method is concrete |
| 448 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { | |
| 449 ResourceMark rm(THREAD); | |
| 450 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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451 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
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452 method_name, |
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453 method_signature)); |
| 0 | 454 } |
| 455 | |
| 456 // 6. access checks, access checking may be turned off when calling from within the VM. | |
| 457 if (check_access) { | |
| 458 assert(current_klass.not_null() , "current_klass should not be null"); | |
| 459 | |
| 460 // check if method can be accessed by the referring class | |
| 461 check_method_accessability(current_klass, | |
| 462 resolved_klass, | |
| 463 KlassHandle(THREAD, resolved_method->method_holder()), | |
| 464 resolved_method, | |
| 465 CHECK); | |
| 466 | |
| 467 // check loader constraints | |
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468 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); |
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469 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); |
| 0 | 470 { |
| 471 ResourceMark rm(THREAD); | |
| 472 char* failed_type_name = | |
| 473 SystemDictionary::check_signature_loaders(method_signature, loader, | |
| 474 class_loader, true, CHECK); | |
| 475 if (failed_type_name != NULL) { | |
| 476 const char* msg = "loader constraint violation: when resolving method" | |
| 477 " \"%s\" the class loader (instance of %s) of the current class, %s," | |
| 478 " and the class loader (instance of %s) for resolved class, %s, have" | |
| 479 " different Class objects for the type %s used in the signature"; | |
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480 char* sig = Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); |
| 0 | 481 const char* loader1 = SystemDictionary::loader_name(loader()); |
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482 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); |
| 0 | 483 const char* loader2 = SystemDictionary::loader_name(class_loader()); |
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484 char* resolved = InstanceKlass::cast(resolved_klass())->name()->as_C_string(); |
| 0 | 485 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
| 486 strlen(current) + strlen(loader2) + strlen(resolved) + | |
| 487 strlen(failed_type_name); | |
| 488 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
| 489 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
| 490 resolved, failed_type_name); | |
| 491 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
| 492 } | |
| 493 } | |
| 494 } | |
| 495 } | |
| 496 | |
| 497 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, | |
| 498 KlassHandle resolved_klass, | |
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499 Symbol* method_name, |
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500 Symbol* method_signature, |
| 0 | 501 KlassHandle current_klass, |
| 502 bool check_access, TRAPS) { | |
| 503 | |
| 504 // check if klass is interface | |
| 505 if (!resolved_klass->is_interface()) { | |
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506 ResourceMark rm(THREAD); |
| 0 | 507 char buf[200]; |
| 508 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name()); | |
| 509 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 510 } | |
| 511 | |
| 512 // lookup method in this interface or its super, java.lang.Object | |
| 513 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
| 514 | |
| 515 if (resolved_method.is_null()) { | |
| 516 // lookup method in all the super-interfaces | |
| 517 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
| 518 if (resolved_method.is_null()) { | |
| 519 // no method found | |
| 520 ResourceMark rm(THREAD); | |
| 521 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), | |
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522 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
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523 method_name, |
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524 method_signature)); |
| 0 | 525 } |
| 526 } | |
| 527 | |
| 528 if (check_access) { | |
| 529 HandleMark hm(THREAD); | |
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530 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); |
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531 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); |
| 0 | 532 { |
| 533 ResourceMark rm(THREAD); | |
| 534 char* failed_type_name = | |
| 535 SystemDictionary::check_signature_loaders(method_signature, loader, | |
| 536 class_loader, true, CHECK); | |
| 537 if (failed_type_name != NULL) { | |
| 538 const char* msg = "loader constraint violation: when resolving " | |
| 539 "interface method \"%s\" the class loader (instance of %s) of the " | |
| 540 "current class, %s, and the class loader (instance of %s) for " | |
| 541 "resolved class, %s, have different Class objects for the type %s " | |
| 542 "used in the signature"; | |
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543 char* sig = Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); |
| 0 | 544 const char* loader1 = SystemDictionary::loader_name(loader()); |
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545 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); |
| 0 | 546 const char* loader2 = SystemDictionary::loader_name(class_loader()); |
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547 char* resolved = InstanceKlass::cast(resolved_klass())->name()->as_C_string(); |
| 0 | 548 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
| 549 strlen(current) + strlen(loader2) + strlen(resolved) + | |
| 550 strlen(failed_type_name); | |
| 551 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
| 552 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
| 553 resolved, failed_type_name); | |
| 554 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
| 555 } | |
| 556 } | |
| 557 } | |
| 558 } | |
| 559 | |
| 560 //------------------------------------------------------------------------------------------------------------------------ | |
| 561 // Field resolution | |
| 562 | |
| 563 void LinkResolver::check_field_accessability(KlassHandle ref_klass, | |
| 564 KlassHandle resolved_klass, | |
| 565 KlassHandle sel_klass, | |
| 566 fieldDescriptor& fd, | |
| 567 TRAPS) { | |
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568 if (!Reflection::verify_field_access(ref_klass(), |
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569 resolved_klass(), |
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570 sel_klass(), |
| 0 | 571 fd.access_flags(), |
| 572 true)) { | |
| 573 ResourceMark rm(THREAD); | |
| 574 Exceptions::fthrow( | |
| 575 THREAD_AND_LOCATION, | |
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576 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 577 "tried to access field %s.%s from class %s", |
| 578 sel_klass->external_name(), | |
| 579 fd.name()->as_C_string(), | |
| 580 ref_klass->external_name() | |
| 581 ); | |
| 582 return; | |
| 583 } | |
| 584 } | |
| 585 | |
| 586 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) { | |
| 587 resolve_field(result, pool, index, byte, check_only, true, CHECK); | |
| 588 } | |
| 589 | |
| 590 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) { | |
| 591 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || | |
| 592 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode"); | |
| 593 | |
| 594 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); | |
| 595 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); | |
| 596 | |
| 597 // resolve specified klass | |
| 598 KlassHandle resolved_klass; | |
| 599 if (update_pool) { | |
| 600 resolve_klass(resolved_klass, pool, index, CHECK); | |
| 601 } else { | |
| 602 resolve_klass_no_update(resolved_klass, pool, index, CHECK); | |
| 603 } | |
| 604 // Load these early in case the resolve of the containing klass fails | |
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605 Symbol* field = pool->name_ref_at(index); |
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606 Symbol* sig = pool->signature_ref_at(index); |
| 0 | 607 // Check if there's a resolved klass containing the field |
| 608 if( resolved_klass.is_null() ) { | |
| 609 ResourceMark rm(THREAD); | |
| 610 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
| 611 } | |
| 612 | |
| 613 // Resolve instance field | |
| 614 fieldDescriptor fd; // find_field initializes fd if found | |
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615 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); |
| 0 | 616 // check if field exists; i.e., if a klass containing the field def has been selected |
| 617 if (sel_klass.is_null()){ | |
| 618 ResourceMark rm(THREAD); | |
| 619 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
| 620 } | |
| 621 | |
| 622 // check access | |
| 623 KlassHandle ref_klass(THREAD, pool->pool_holder()); | |
| 624 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK); | |
| 625 | |
| 626 // check for errors | |
| 627 if (is_static != fd.is_static()) { | |
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628 ResourceMark rm(THREAD); |
| 0 | 629 char msg[200]; |
| 630 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", Klass::cast(resolved_klass())->external_name(), fd.name()->as_C_string()); | |
| 631 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); | |
| 632 } | |
| 633 | |
| 634 // Final fields can only be accessed from its own class. | |
| 635 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) { | |
| 636 THROW(vmSymbols::java_lang_IllegalAccessError()); | |
| 637 } | |
| 638 | |
| 639 // initialize resolved_klass if necessary | |
| 640 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) | |
| 641 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) | |
| 642 // | |
| 643 // note 2: we don't want to force initialization if we are just checking | |
| 644 // if the field access is legal; e.g., during compilation | |
| 645 if (is_static && !check_only) { | |
| 646 sel_klass->initialize(CHECK); | |
| 647 } | |
| 648 | |
| 649 { | |
| 650 HandleMark hm(THREAD); | |
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651 Handle ref_loader (THREAD, InstanceKlass::cast(ref_klass())->class_loader()); |
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652 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader()); |
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653 Symbol* signature_ref = pool->signature_ref_at(index); |
| 0 | 654 { |
| 655 ResourceMark rm(THREAD); | |
| 656 char* failed_type_name = | |
| 657 SystemDictionary::check_signature_loaders(signature_ref, | |
| 658 ref_loader, sel_loader, | |
| 659 false, | |
| 660 CHECK); | |
| 661 if (failed_type_name != NULL) { | |
| 662 const char* msg = "loader constraint violation: when resolving field" | |
| 663 " \"%s\" the class loader (instance of %s) of the referring class, " | |
| 664 "%s, and the class loader (instance of %s) for the field's resolved " | |
| 665 "type, %s, have different Class objects for that type"; | |
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666 char* field_name = field->as_C_string(); |
| 0 | 667 const char* loader1 = SystemDictionary::loader_name(ref_loader()); |
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668 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string(); |
| 0 | 669 const char* loader2 = SystemDictionary::loader_name(sel_loader()); |
| 670 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + | |
| 671 strlen(sel) + strlen(loader2) + strlen(failed_type_name); | |
| 672 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
| 673 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, | |
| 674 failed_type_name); | |
| 675 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
| 676 } | |
| 677 } | |
| 678 } | |
| 679 | |
| 680 // return information. note that the klass is set to the actual klass containing the | |
| 681 // field, otherwise access of static fields in superclasses will not work. | |
| 682 KlassHandle holder (THREAD, fd.field_holder()); | |
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683 Symbol* name = fd.name(); |
| 0 | 684 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags()); |
| 685 } | |
| 686 | |
| 687 | |
| 688 //------------------------------------------------------------------------------------------------------------------------ | |
| 689 // Invoke resolution | |
| 690 // | |
| 691 // Naming conventions: | |
| 692 // | |
| 693 // resolved_method the specified method (i.e., static receiver specified via constant pool index) | |
| 694 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) | |
| 695 // resolved_klass the specified klass (i.e., specified via constant pool index) | |
| 696 // recv_klass the receiver klass | |
| 697 | |
| 698 | |
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699 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, |
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700 Symbol* method_signature, KlassHandle current_klass, |
| 0 | 701 bool check_access, bool initialize_class, TRAPS) { |
| 702 methodHandle resolved_method; | |
| 703 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 704 resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder())); | |
| 705 | |
| 706 // Initialize klass (this should only happen if everything is ok) | |
| 707 if (initialize_class && resolved_klass->should_be_initialized()) { | |
| 708 resolved_klass->initialize(CHECK); | |
| 709 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 710 } | |
| 711 | |
| 712 // setup result | |
| 713 result.set_static(resolved_klass, resolved_method, CHECK); | |
| 714 } | |
| 715 | |
| 716 // throws linktime exceptions | |
| 717 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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718 Symbol* method_name, Symbol* method_signature, |
| 0 | 719 KlassHandle current_klass, bool check_access, TRAPS) { |
| 720 | |
| 721 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 722 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); | |
| 723 | |
| 724 // check if static | |
| 725 if (!resolved_method->is_static()) { | |
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726 ResourceMark rm(THREAD); |
| 0 | 727 char buf[200]; |
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728 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 729 resolved_method->name(), |
| 730 resolved_method->signature())); | |
| 731 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 732 } | |
| 733 } | |
| 734 | |
| 735 | |
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736 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, |
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737 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
| 0 | 738 methodHandle resolved_method; |
| 739 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 740 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); | |
| 741 } | |
| 742 | |
| 743 // throws linktime exceptions | |
| 744 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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745 Symbol* method_name, Symbol* method_signature, |
| 0 | 746 KlassHandle current_klass, bool check_access, TRAPS) { |
| 747 | |
| 6934 | 748 if (resolved_klass->is_interface() && current_klass() != NULL) { |
| 749 // If the target class is a direct interface, treat this as a "super" | |
| 750 // default call. | |
| 751 // | |
| 752 // If the current method is an overpass that happens to call a direct | |
| 753 // super-interface's method, then we'll end up rerunning the default method | |
| 754 // analysis even though we don't need to, but that's ok since it will end | |
| 755 // up with the same answer. | |
| 756 InstanceKlass* ik = InstanceKlass::cast(current_klass()); | |
| 757 Array<Klass*>* interfaces = ik->local_interfaces(); | |
| 758 int num_interfaces = interfaces->length(); | |
| 759 for (int index = 0; index < num_interfaces; index++) { | |
| 760 if (interfaces->at(index) == resolved_klass()) { | |
| 761 Method* method = DefaultMethods::find_super_default(current_klass(), | |
| 762 resolved_klass(), method_name, method_signature, CHECK); | |
| 763 resolved_method = methodHandle(THREAD, method); | |
| 764 return; | |
| 765 } | |
| 766 } | |
| 767 } | |
| 768 | |
| 0 | 769 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); |
| 770 | |
| 771 // check if method name is <init>, that it is found in same klass as static type | |
| 772 if (resolved_method->name() == vmSymbols::object_initializer_name() && | |
| 773 resolved_method->method_holder() != resolved_klass()) { | |
| 774 ResourceMark rm(THREAD); | |
| 775 Exceptions::fthrow( | |
| 776 THREAD_AND_LOCATION, | |
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777 vmSymbols::java_lang_NoSuchMethodError(), |
| 0 | 778 "%s: method %s%s not found", |
| 779 resolved_klass->external_name(), | |
| 780 resolved_method->name()->as_C_string(), | |
| 781 resolved_method->signature()->as_C_string() | |
| 782 ); | |
| 783 return; | |
| 784 } | |
| 785 | |
| 786 // check if not static | |
| 787 if (resolved_method->is_static()) { | |
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788 ResourceMark rm(THREAD); |
| 0 | 789 char buf[200]; |
| 790 jio_snprintf(buf, sizeof(buf), | |
| 791 "Expecting non-static method %s", | |
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792 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 793 resolved_method->name(), |
| 794 resolved_method->signature())); | |
| 795 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 796 } | |
| 797 } | |
| 798 | |
| 799 // throws runtime exceptions | |
| 800 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
| 801 KlassHandle current_klass, bool check_access, TRAPS) { | |
| 802 | |
| 803 // resolved method is selected method unless we have an old-style lookup | |
| 804 methodHandle sel_method(THREAD, resolved_method()); | |
| 805 | |
| 806 // check if this is an old-style super call and do a new lookup if so | |
| 807 { KlassHandle method_klass = KlassHandle(THREAD, | |
| 808 resolved_method->method_holder()); | |
| 809 | |
| 6934 | 810 const bool direct_calling_default_method = |
| 811 resolved_klass() != NULL && resolved_method() != NULL && | |
| 812 resolved_klass->is_interface() && !resolved_method->is_abstract(); | |
| 813 | |
| 814 if (!direct_calling_default_method && | |
| 815 check_access && | |
| 0 | 816 // a) check if ACC_SUPER flag is set for the current class |
| 817 current_klass->is_super() && | |
| 818 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!) | |
| 6934 | 819 current_klass->is_subtype_of(method_klass()) && |
| 820 current_klass() != method_klass() && | |
| 0 | 821 // c) check if the method is not <init> |
| 822 resolved_method->name() != vmSymbols::object_initializer_name()) { | |
| 823 // Lookup super method | |
| 824 KlassHandle super_klass(THREAD, current_klass->super()); | |
| 825 lookup_instance_method_in_klasses(sel_method, super_klass, | |
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826 resolved_method->name(), |
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827 resolved_method->signature(), CHECK); |
| 0 | 828 // check if found |
| 829 if (sel_method.is_null()) { | |
| 830 ResourceMark rm(THREAD); | |
| 831 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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832 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 833 resolved_method->name(), |
| 834 resolved_method->signature())); | |
| 835 } | |
| 836 } | |
| 837 } | |
| 838 | |
| 839 // check if not static | |
| 840 if (sel_method->is_static()) { | |
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841 ResourceMark rm(THREAD); |
| 0 | 842 char buf[200]; |
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843 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 844 resolved_method->name(), |
| 845 resolved_method->signature())); | |
| 846 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 847 } | |
| 848 | |
| 849 // check if abstract | |
| 850 if (sel_method->is_abstract()) { | |
| 851 ResourceMark rm(THREAD); | |
| 852 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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853 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 854 sel_method->name(), |
| 855 sel_method->signature())); | |
| 856 } | |
| 857 | |
| 858 // setup result | |
| 859 result.set_static(resolved_klass, sel_method, CHECK); | |
| 860 } | |
| 861 | |
| 862 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, | |
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863 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
| 0 | 864 bool check_access, bool check_null_and_abstract, TRAPS) { |
| 865 methodHandle resolved_method; | |
| 866 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 867 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); | |
| 868 } | |
| 869 | |
| 870 // throws linktime exceptions | |
| 871 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, | |
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872 Symbol* method_name, Symbol* method_signature, |
| 0 | 873 KlassHandle current_klass, bool check_access, TRAPS) { |
| 874 // normal method resolution | |
| 875 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 876 | |
| 877 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
| 878 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
| 879 | |
| 880 // check if not static | |
| 881 if (resolved_method->is_static()) { | |
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882 ResourceMark rm(THREAD); |
| 0 | 883 char buf[200]; |
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884 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 885 resolved_method->name(), |
| 886 resolved_method->signature())); | |
| 887 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 888 } | |
| 889 } | |
| 890 | |
| 891 // throws runtime exceptions | |
| 892 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, | |
| 893 methodHandle resolved_method, | |
| 894 KlassHandle resolved_klass, | |
| 895 Handle recv, | |
| 896 KlassHandle recv_klass, | |
| 897 bool check_null_and_abstract, | |
| 898 TRAPS) { | |
| 899 | |
| 900 // setup default return values | |
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901 int vtable_index = Method::invalid_vtable_index; |
| 0 | 902 methodHandle selected_method; |
| 903 | |
| 904 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); | |
| 905 | |
| 906 // runtime method resolution | |
| 907 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists | |
| 908 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 909 } | |
| 910 | |
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911 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s |
| 0 | 912 // has not been rewritten, and the vtable initialized. |
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913 assert(resolved_method->method_holder()->is_linked(), "must be linked"); |
| 0 | 914 |
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915 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s |
| 0 | 916 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since |
| 917 // a missing receiver might result in a bogus lookup. | |
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918 assert(resolved_method->method_holder()->is_linked(), "must be linked"); |
| 0 | 919 |
| 920 // do lookup based on receiver klass using the vtable index | |
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921 if (resolved_method->method_holder()->is_interface()) { // miranda method |
| 0 | 922 vtable_index = vtable_index_of_miranda_method(resolved_klass, |
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923 resolved_method->name(), |
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924 resolved_method->signature(), CHECK); |
| 0 | 925 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); |
| 926 | |
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927 InstanceKlass* inst = InstanceKlass::cast(recv_klass()); |
| 0 | 928 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); |
| 929 } else { | |
| 930 // at this point we are sure that resolved_method is virtual and not | |
| 931 // a miranda method; therefore, it must have a valid vtable index. | |
| 932 vtable_index = resolved_method->vtable_index(); | |
| 933 // We could get a negative vtable_index for final methods, | |
| 934 // because as an optimization they are they are never put in the vtable, | |
| 935 // unless they override an existing method. | |
| 936 // If we do get a negative, it means the resolved method is the the selected | |
| 937 // method, and it can never be changed by an override. | |
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938 if (vtable_index == Method::nonvirtual_vtable_index) { |
| 0 | 939 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); |
| 940 selected_method = resolved_method; | |
| 941 } else { | |
| 942 // recv_klass might be an arrayKlassOop but all vtables start at | |
| 943 // the same place. The cast is to avoid virtual call and assertion. | |
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944 InstanceKlass* inst = (InstanceKlass*)recv_klass(); |
| 0 | 945 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); |
| 946 } | |
| 947 } | |
| 948 | |
| 949 // check if method exists | |
| 950 if (selected_method.is_null()) { | |
| 951 ResourceMark rm(THREAD); | |
| 952 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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953 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 954 resolved_method->name(), |
| 955 resolved_method->signature())); | |
| 956 } | |
| 957 | |
| 958 // check if abstract | |
| 959 if (check_null_and_abstract && selected_method->is_abstract()) { | |
| 960 ResourceMark rm(THREAD); | |
| 961 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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962 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 963 selected_method->name(), |
| 964 selected_method->signature())); | |
| 965 } | |
| 966 | |
| 967 // setup result | |
| 968 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); | |
| 969 } | |
| 970 | |
| 971 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, | |
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972 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
| 0 | 973 bool check_access, bool check_null_and_abstract, TRAPS) { |
| 974 methodHandle resolved_method; | |
| 975 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 976 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); | |
| 977 } | |
| 978 | |
| 979 // throws linktime exceptions | |
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980 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, |
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981 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
| 0 | 982 // normal interface method resolution |
| 983 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 984 | |
| 985 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
| 986 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
| 987 } | |
| 988 | |
| 989 // throws runtime exceptions | |
| 990 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
| 991 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { | |
| 992 // check if receiver exists | |
| 993 if (check_null_and_abstract && recv.is_null()) { | |
| 994 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 995 } | |
| 996 | |
| 997 // check if receiver klass implements the resolved interface | |
| 998 if (!recv_klass->is_subtype_of(resolved_klass())) { | |
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999 ResourceMark rm(THREAD); |
| 0 | 1000 char buf[200]; |
| 1001 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", | |
| 1002 (Klass::cast(recv_klass()))->external_name(), | |
| 1003 (Klass::cast(resolved_klass()))->external_name()); | |
| 1004 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 1005 } | |
| 1006 // do lookup based on receiver klass | |
| 1007 methodHandle sel_method; | |
| 1008 lookup_instance_method_in_klasses(sel_method, recv_klass, | |
|
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1009 resolved_method->name(), |
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1010 resolved_method->signature(), CHECK); |
| 0 | 1011 // check if method exists |
| 1012 if (sel_method.is_null()) { | |
| 1013 ResourceMark rm(THREAD); | |
| 1014 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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1015 Method::name_and_sig_as_C_string(Klass::cast(recv_klass()), |
| 0 | 1016 resolved_method->name(), |
| 1017 resolved_method->signature())); | |
| 1018 } | |
| 1019 // check if public | |
| 1020 if (!sel_method->is_public()) { | |
| 1021 ResourceMark rm(THREAD); | |
| 1022 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), | |
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1023 Method::name_and_sig_as_C_string(Klass::cast(recv_klass()), |
| 0 | 1024 sel_method->name(), |
| 1025 sel_method->signature())); | |
| 1026 } | |
| 1027 // check if abstract | |
| 1028 if (check_null_and_abstract && sel_method->is_abstract()) { | |
| 1029 ResourceMark rm(THREAD); | |
| 1030 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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1031 Method::name_and_sig_as_C_string(Klass::cast(recv_klass()), |
| 0 | 1032 sel_method->name(), |
| 1033 sel_method->signature())); | |
| 1034 } | |
| 1035 // setup result | |
| 1036 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK); | |
| 1037 } | |
| 1038 | |
| 1039 | |
| 1040 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( | |
| 1041 KlassHandle resolved_klass, | |
|
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1042 Symbol* method_name, |
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1043 Symbol* method_signature, |
| 0 | 1044 KlassHandle current_klass, |
| 1045 bool check_access) { | |
| 1046 EXCEPTION_MARK; | |
| 1047 methodHandle method_result; | |
| 1048 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
| 1049 if (HAS_PENDING_EXCEPTION) { | |
| 1050 CLEAR_PENDING_EXCEPTION; | |
| 1051 return methodHandle(); | |
| 1052 } else { | |
| 1053 return method_result; | |
| 1054 } | |
| 1055 } | |
| 1056 | |
| 1057 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( | |
| 1058 KlassHandle resolved_klass, | |
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1059 Symbol* method_name, |
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1060 Symbol* method_signature, |
| 0 | 1061 KlassHandle current_klass, |
| 1062 bool check_access) { | |
| 1063 EXCEPTION_MARK; | |
| 1064 methodHandle method_result; | |
| 1065 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
| 1066 if (HAS_PENDING_EXCEPTION) { | |
| 1067 CLEAR_PENDING_EXCEPTION; | |
| 1068 return methodHandle(); | |
| 1069 } else { | |
| 1070 return method_result; | |
| 1071 } | |
| 1072 } | |
| 1073 | |
| 1074 methodHandle LinkResolver::resolve_virtual_call_or_null( | |
| 1075 KlassHandle receiver_klass, | |
| 1076 KlassHandle resolved_klass, | |
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1077 Symbol* name, |
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1078 Symbol* signature, |
| 0 | 1079 KlassHandle current_klass) { |
| 1080 EXCEPTION_MARK; | |
| 1081 CallInfo info; | |
| 1082 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1083 if (HAS_PENDING_EXCEPTION) { | |
| 1084 CLEAR_PENDING_EXCEPTION; | |
| 1085 return methodHandle(); | |
| 1086 } | |
| 1087 return info.selected_method(); | |
| 1088 } | |
| 1089 | |
| 1090 methodHandle LinkResolver::resolve_interface_call_or_null( | |
| 1091 KlassHandle receiver_klass, | |
| 1092 KlassHandle resolved_klass, | |
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1093 Symbol* name, |
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1094 Symbol* signature, |
| 0 | 1095 KlassHandle current_klass) { |
| 1096 EXCEPTION_MARK; | |
| 1097 CallInfo info; | |
| 1098 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1099 if (HAS_PENDING_EXCEPTION) { | |
| 1100 CLEAR_PENDING_EXCEPTION; | |
| 1101 return methodHandle(); | |
| 1102 } | |
| 1103 return info.selected_method(); | |
| 1104 } | |
| 1105 | |
| 1106 int LinkResolver::resolve_virtual_vtable_index( | |
| 1107 KlassHandle receiver_klass, | |
| 1108 KlassHandle resolved_klass, | |
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1109 Symbol* name, |
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1110 Symbol* signature, |
| 0 | 1111 KlassHandle current_klass) { |
| 1112 EXCEPTION_MARK; | |
| 1113 CallInfo info; | |
| 1114 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1115 if (HAS_PENDING_EXCEPTION) { | |
| 1116 CLEAR_PENDING_EXCEPTION; | |
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1117 return Method::invalid_vtable_index; |
| 0 | 1118 } |
| 1119 return info.vtable_index(); | |
| 1120 } | |
| 1121 | |
| 1122 methodHandle LinkResolver::resolve_static_call_or_null( | |
| 1123 KlassHandle resolved_klass, | |
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1124 Symbol* name, |
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1125 Symbol* signature, |
| 0 | 1126 KlassHandle current_klass) { |
| 1127 EXCEPTION_MARK; | |
| 1128 CallInfo info; | |
| 1129 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1130 if (HAS_PENDING_EXCEPTION) { | |
| 1131 CLEAR_PENDING_EXCEPTION; | |
| 1132 return methodHandle(); | |
| 1133 } | |
| 1134 return info.selected_method(); | |
| 1135 } | |
| 1136 | |
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1137 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, |
| 0 | 1138 KlassHandle current_klass) { |
| 1139 EXCEPTION_MARK; | |
| 1140 CallInfo info; | |
| 1141 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); | |
| 1142 if (HAS_PENDING_EXCEPTION) { | |
| 1143 CLEAR_PENDING_EXCEPTION; | |
| 1144 return methodHandle(); | |
| 1145 } | |
| 1146 return info.selected_method(); | |
| 1147 } | |
| 1148 | |
| 1149 | |
| 1150 | |
| 1151 //------------------------------------------------------------------------------------------------------------------------ | |
| 1152 // ConstantPool entries | |
| 1153 | |
| 1154 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { | |
| 1155 switch (byte) { | |
| 1156 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; | |
| 1157 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; | |
| 1158 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; | |
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1159 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break; |
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1160 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; |
| 0 | 1161 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; |
| 1162 } | |
| 1163 return; | |
| 1164 } | |
| 1165 | |
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1166 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, |
| 0 | 1167 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { |
| 1168 // resolve klass | |
| 1169 resolve_klass(resolved_klass, pool, index, CHECK); | |
| 1170 | |
| 1171 // Get name, signature, and static klass | |
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1172 method_name = pool->name_ref_at(index); |
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1173 method_signature = pool->signature_ref_at(index); |
| 0 | 1174 current_klass = KlassHandle(THREAD, pool->pool_holder()); |
| 1175 } | |
| 1176 | |
| 1177 | |
| 1178 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
| 1179 KlassHandle resolved_klass; | |
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1180 Symbol* method_name = NULL; |
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1181 Symbol* method_signature = NULL; |
| 0 | 1182 KlassHandle current_klass; |
| 1183 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
| 1184 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
| 1185 } | |
| 1186 | |
| 1187 | |
| 1188 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
| 1189 KlassHandle resolved_klass; | |
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1190 Symbol* method_name = NULL; |
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1191 Symbol* method_signature = NULL; |
| 0 | 1192 KlassHandle current_klass; |
| 1193 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
| 1194 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
| 1195 } | |
| 1196 | |
| 1197 | |
| 1198 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, | |
| 1199 constantPoolHandle pool, int index, | |
| 1200 TRAPS) { | |
| 1201 | |
| 1202 KlassHandle resolved_klass; | |
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1203 Symbol* method_name = NULL; |
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1204 Symbol* method_signature = NULL; |
| 0 | 1205 KlassHandle current_klass; |
| 1206 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
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1207 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); |
| 0 | 1208 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); |
| 1209 } | |
| 1210 | |
| 1211 | |
| 1212 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { | |
| 1213 KlassHandle resolved_klass; | |
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1214 Symbol* method_name = NULL; |
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1215 Symbol* method_signature = NULL; |
| 0 | 1216 KlassHandle current_klass; |
| 1217 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
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1218 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); |
| 0 | 1219 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); |
| 1220 } | |
| 1221 | |
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1222 |
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1223 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { |
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1224 assert(EnableInvokeDynamic, ""); |
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1225 // This guy is reached from InterpreterRuntime::resolve_invokehandle. |
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1226 KlassHandle resolved_klass; |
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1227 Symbol* method_name = NULL; |
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1228 Symbol* method_signature = NULL; |
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1229 KlassHandle current_klass; |
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1230 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); |
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1231 if (TraceMethodHandles) |
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1232 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string()); |
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1233 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK); |
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1234 } |
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1235 |
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1236 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass, |
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1237 Symbol* method_name, Symbol* method_signature, |
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1238 KlassHandle current_klass, |
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1239 TRAPS) { |
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1240 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar |
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1241 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), ""); |
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1242 assert(MethodHandles::is_signature_polymorphic_name(method_name), ""); |
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1243 methodHandle resolved_method; |
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1244 Handle resolved_appendix; |
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1245 Handle resolved_method_type; |
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1246 lookup_polymorphic_method(resolved_method, resolved_klass, |
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1247 method_name, method_signature, |
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1248 current_klass, &resolved_appendix, &resolved_method_type, CHECK); |
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1249 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); |
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1250 } |
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1251 |
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1252 |
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1253 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { |
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1254 assert(EnableInvokeDynamic, ""); |
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1255 pool->set_invokedynamic(); // mark header to flag active call sites |
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1256 |
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1257 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK); |
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1258 Symbol* method_name = pool->name_ref_at(index); |
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1259 Symbol* method_signature = pool->signature_ref_at(index); |
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1260 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder()); |
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1261 |
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1262 // Resolve the bootstrap specifier (BSM + optional arguments). |
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1263 Handle bootstrap_specifier; |
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1264 // Check if CallSite has been bound already: |
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1265 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index); |
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1266 if (cpce->is_f1_null()) { |
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1267 int pool_index = cpce->constant_pool_index(); |
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1268 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK); |
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1269 assert(bsm_info != NULL, ""); |
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1270 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic. |
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1271 bootstrap_specifier = Handle(THREAD, bsm_info); |
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1272 } |
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1273 if (!cpce->is_f1_null()) { |
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1274 methodHandle method( THREAD, cpce->f1_as_method()); |
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1275 Handle appendix( THREAD, cpce->appendix_if_resolved(pool)); |
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1276 Handle method_type(THREAD, cpce->method_type_if_resolved(pool)); |
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1277 result.set_handle(method, appendix, method_type, CHECK); |
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1278 return; |
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1279 } |
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1280 |
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1281 if (TraceMethodHandles) { |
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1282 tty->print_cr("resolve_invokedynamic #%d %s %s", |
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1283 ConstantPool::decode_invokedynamic_index(index), |
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1284 method_name->as_C_string(), method_signature->as_C_string()); |
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1285 tty->print(" BSM info: "); bootstrap_specifier->print(); |
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1286 } |
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1287 |
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1288 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK); |
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1289 } |
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1290 |
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1291 void LinkResolver::resolve_dynamic_call(CallInfo& result, |
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1292 Handle bootstrap_specifier, |
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1293 Symbol* method_name, Symbol* method_signature, |
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1294 KlassHandle current_klass, |
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1295 TRAPS) { |
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1296 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...) |
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1297 // The appendix argument is likely to be a freshly-created CallSite. |
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1298 Handle resolved_appendix; |
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1299 Handle resolved_method_type; |
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1300 methodHandle resolved_method = |
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1301 SystemDictionary::find_dynamic_call_site_invoker(current_klass, |
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1302 bootstrap_specifier, |
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1303 method_name, method_signature, |
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1304 &resolved_appendix, |
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1305 &resolved_method_type, |
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1306 THREAD); |
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1307 if (HAS_PENDING_EXCEPTION) { |
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1308 if (TraceMethodHandles) { |
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1309 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION); |
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1310 PENDING_EXCEPTION->print(); |
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1311 } |
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1312 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) { |
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1313 // throw these guys, since they are already wrapped |
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1314 return; |
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1315 } |
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1316 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { |
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1317 // intercept only LinkageErrors which might have failed to wrap |
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1318 return; |
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1319 } |
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1320 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS. |
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1321 Handle nested_exception(THREAD, PENDING_EXCEPTION); |
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1322 CLEAR_PENDING_EXCEPTION; |
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1323 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception) |
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1324 } |
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1325 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); |
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1326 } |
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1327 |
| 0 | 1328 //------------------------------------------------------------------------------------------------------------------------ |
| 1329 #ifndef PRODUCT | |
| 1330 | |
| 1331 void FieldAccessInfo::print() { | |
| 1332 ResourceMark rm; | |
| 1333 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset()); | |
| 1334 } | |
| 1335 | |
| 1336 #endif |