Mercurial > hg > truffle
annotate src/share/vm/interpreter/linkResolver.cpp @ 6729:d17383603741
7196120: NPG: JSR 2292 test fails because missing fix for 7188911
Reviewed-by: kvn, coleenp
| author | twisti |
|---|---|
| date | Tue, 04 Sep 2012 18:01:20 -0700 |
| parents | da91efe96a93 |
| children | f6b0eb4e44cf |
| 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" |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "classfile/vmSymbols.hpp" | |
| 28 #include "compiler/compileBroker.hpp" | |
| 29 #include "gc_interface/collectedHeap.inline.hpp" | |
| 30 #include "interpreter/bytecode.hpp" | |
| 31 #include "interpreter/interpreterRuntime.hpp" | |
| 32 #include "interpreter/linkResolver.hpp" | |
| 33 #include "memory/resourceArea.hpp" | |
| 34 #include "memory/universe.inline.hpp" | |
| 35 #include "oops/instanceKlass.hpp" | |
| 36 #include "oops/objArrayOop.hpp" | |
| 37 #include "prims/methodHandles.hpp" | |
| 38 #include "prims/nativeLookup.hpp" | |
| 39 #include "runtime/compilationPolicy.hpp" | |
| 40 #include "runtime/fieldDescriptor.hpp" | |
| 41 #include "runtime/frame.inline.hpp" | |
| 42 #include "runtime/handles.inline.hpp" | |
| 43 #include "runtime/reflection.hpp" | |
| 44 #include "runtime/signature.hpp" | |
| 45 #include "runtime/vmThread.hpp" | |
| 46 #ifdef TARGET_OS_FAMILY_linux | |
| 47 # include "thread_linux.inline.hpp" | |
| 48 #endif | |
| 49 #ifdef TARGET_OS_FAMILY_solaris | |
| 50 # include "thread_solaris.inline.hpp" | |
| 51 #endif | |
| 52 #ifdef TARGET_OS_FAMILY_windows | |
| 53 # include "thread_windows.inline.hpp" | |
| 54 #endif | |
| 3960 | 55 #ifdef TARGET_OS_FAMILY_bsd |
| 56 # include "thread_bsd.inline.hpp" | |
| 57 #endif | |
| 0 | 58 |
| 59 //------------------------------------------------------------------------------------------------------------------------ | |
| 60 // Implementation of FieldAccessInfo | |
| 61 | |
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62 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset, |
| 0 | 63 BasicType field_type, AccessFlags access_flags) { |
| 64 _klass = klass; | |
| 65 _name = name; | |
| 66 _field_index = field_index; | |
| 67 _field_offset = field_offset; | |
| 68 _field_type = field_type; | |
| 69 _access_flags = access_flags; | |
| 70 } | |
| 71 | |
| 72 | |
| 73 //------------------------------------------------------------------------------------------------------------------------ | |
| 74 // Implementation of CallInfo | |
| 75 | |
| 76 | |
| 77 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) { | |
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78 int vtable_index = Method::nonvirtual_vtable_index; |
| 0 | 79 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); |
| 80 } | |
| 81 | |
| 82 | |
| 83 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) { | |
| 84 // This is only called for interface methods. If the resolved_method | |
| 85 // comes from java/lang/Object, it can be the subject of a virtual call, so | |
| 86 // we should pick the vtable index from the resolved method. | |
| 87 // Other than that case, there is no valid vtable index to specify. | |
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88 int vtable_index = Method::invalid_vtable_index; |
| 1142 | 89 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) { |
| 0 | 90 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check"); |
| 91 vtable_index = resolved_method->vtable_index(); | |
| 92 } | |
| 93 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); | |
| 94 } | |
| 95 | |
| 96 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { | |
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97 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index"); |
| 0 | 98 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); |
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99 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call"); |
| 0 | 100 } |
| 101 | |
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102 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, TRAPS) { |
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103 if (resolved_method.is_null()) { |
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104 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null"); |
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105 } |
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106 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass(); |
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107 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic || |
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108 resolved_method->is_compiled_lambda_form(), |
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109 "linkMethod must return one of these"); |
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110 int vtable_index = Method::nonvirtual_vtable_index; |
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111 assert(resolved_method->vtable_index() == vtable_index, ""); |
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112 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); |
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113 _resolved_appendix = resolved_appendix; |
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114 } |
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115 |
| 0 | 116 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { |
| 117 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond"); | |
| 118 _resolved_klass = resolved_klass; | |
| 119 _selected_klass = selected_klass; | |
| 120 _resolved_method = resolved_method; | |
| 121 _selected_method = selected_method; | |
| 122 _vtable_index = vtable_index; | |
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123 _resolved_appendix = Handle(); |
| 1783 | 124 if (CompilationPolicy::must_be_compiled(selected_method)) { |
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125 // This path is unusual, mostly used by the '-Xcomp' stress test mode. |
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126 |
| 1783 | 127 // Note: with several active threads, the must_be_compiled may be true |
| 128 // while can_be_compiled is false; remove assert | |
| 129 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile"); | |
| 0 | 130 if (THREAD->is_Compiler_thread()) { |
| 131 // don't force compilation, resolve was on behalf of compiler | |
| 132 return; | |
| 133 } | |
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134 if (InstanceKlass::cast(selected_method->method_holder())->is_not_initialized()) { |
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135 // 'is_not_initialized' means not only '!is_initialized', but also that |
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136 // initialization has not been started yet ('!being_initialized') |
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137 // Do not force compilation of methods in uninitialized classes. |
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138 // Note that doing this would throw an assert later, |
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139 // in CompileBroker::compile_method. |
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140 // We sometimes use the link resolver to do reflective lookups |
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141 // even before classes are initialized. |
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142 return; |
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143 } |
| 0 | 144 CompileBroker::compile_method(selected_method, InvocationEntryBci, |
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145 CompilationPolicy::policy()->initial_compile_level(), |
| 1783 | 146 methodHandle(), 0, "must_be_compiled", CHECK); |
| 0 | 147 } |
| 148 } | |
| 149 | |
| 150 | |
| 151 //------------------------------------------------------------------------------------------------------------------------ | |
| 152 // Klass resolution | |
| 153 | |
| 154 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) { | |
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155 if (!Reflection::verify_class_access(ref_klass(), |
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156 sel_klass(), |
| 0 | 157 true)) { |
| 158 ResourceMark rm(THREAD); | |
| 159 Exceptions::fthrow( | |
| 160 THREAD_AND_LOCATION, | |
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161 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 162 "tried to access class %s from class %s", |
| 163 sel_klass->external_name(), | |
| 164 ref_klass->external_name() | |
| 165 ); | |
| 166 return; | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { | |
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171 Klass* result_oop = pool->klass_ref_at(index, CHECK); |
| 0 | 172 result = KlassHandle(THREAD, result_oop); |
| 173 } | |
| 174 | |
| 175 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { | |
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176 Klass* result_oop = |
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177 ConstantPool::klass_ref_at_if_loaded_check(pool, index, CHECK); |
| 0 | 178 result = KlassHandle(THREAD, result_oop); |
| 179 } | |
| 180 | |
| 181 | |
| 182 //------------------------------------------------------------------------------------------------------------------------ | |
| 183 // Method resolution | |
| 184 // | |
| 185 // According to JVM spec. $5.4.3c & $5.4.3d | |
| 186 | |
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187 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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188 Method* result_oop = klass->uncached_lookup_method(name, signature); |
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189 if (EnableInvokeDynamic && result_oop != NULL) { |
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190 vmIntrinsics::ID iid = result_oop->intrinsic_id(); |
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191 if (MethodHandles::is_signature_polymorphic(iid)) { |
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192 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method. |
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193 return; |
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194 } |
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195 } |
| 0 | 196 result = methodHandle(THREAD, result_oop); |
| 197 } | |
| 198 | |
| 199 // returns first instance method | |
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200 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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201 Method* result_oop = klass->uncached_lookup_method(name, signature); |
| 0 | 202 result = methodHandle(THREAD, result_oop); |
| 203 while (!result.is_null() && result->is_static()) { | |
| 204 klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super()); | |
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205 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature)); |
| 0 | 206 } |
| 207 } | |
| 208 | |
| 209 | |
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210 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
| 0 | 211 ResourceMark rm(THREAD); |
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212 klassVtable *vt = InstanceKlass::cast(klass())->vtable(); |
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213 return vt->index_of_miranda(name, signature); |
| 0 | 214 } |
| 215 | |
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216 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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217 InstanceKlass *ik = InstanceKlass::cast(klass()); |
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218 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature)); |
| 0 | 219 } |
| 220 | |
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221 void LinkResolver::lookup_polymorphic_method(methodHandle& result, |
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222 KlassHandle klass, Symbol* name, Symbol* full_signature, |
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223 KlassHandle current_klass, |
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224 Handle* appendix_result_or_null, |
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225 TRAPS) { |
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226 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name); |
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227 if (TraceMethodHandles) { |
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228 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s", |
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229 vmIntrinsics::name_at(iid), klass->external_name(), |
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230 name->as_C_string(), full_signature->as_C_string()); |
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231 } |
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232 if (EnableInvokeDynamic && |
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233 klass() == SystemDictionary::MethodHandle_klass() && |
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234 iid != vmIntrinsics::_none) { |
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235 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) { |
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236 // Most of these do not need an up-call to Java to resolve, so can be done anywhere. |
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237 // Do not erase last argument type (MemberName) if it is a static linkTo method. |
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238 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid); |
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239 TempNewSymbol basic_signature = |
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240 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK); |
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241 if (TraceMethodHandles) { |
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242 tty->print_cr("lookup_polymorphic_method %s %s => basic %s", |
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243 name->as_C_string(), |
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244 full_signature->as_C_string(), |
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245 basic_signature->as_C_string()); |
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246 } |
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247 result = SystemDictionary::find_method_handle_intrinsic(iid, |
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248 basic_signature, |
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249 CHECK); |
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250 if (result.not_null()) { |
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251 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic"); |
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252 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this"); |
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253 assert(basic_signature == result->signature(), "predict the result signature"); |
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254 if (TraceMethodHandles) { |
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255 tty->print("lookup_polymorphic_method => intrinsic "); |
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256 result->print_on(tty); |
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257 } |
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258 return; |
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259 } |
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260 } else if (iid == vmIntrinsics::_invokeGeneric |
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261 && !THREAD->is_Compiler_thread() |
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262 && appendix_result_or_null != NULL) { |
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263 // This is a method with type-checking semantics. |
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264 // We will ask Java code to spin an adapter method for it. |
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265 if (!MethodHandles::enabled()) { |
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266 // Make sure the Java part of the runtime has been booted up. |
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267 Klass* natives = SystemDictionary::MethodHandleNatives_klass(); |
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268 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) { |
|
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269 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(), |
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270 Handle(), |
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271 Handle(), |
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272 true, |
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273 CHECK); |
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274 } |
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275 } |
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276 |
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277 Handle appendix; |
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278 result = SystemDictionary::find_method_handle_invoker(name, |
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279 full_signature, |
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280 current_klass, |
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281 &appendix, |
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282 CHECK); |
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283 if (TraceMethodHandles) { |
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284 tty->print("lookup_polymorphic_method => (via Java) "); |
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285 result->print_on(tty); |
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286 tty->print(" lookup_polymorphic_method => appendix = "); |
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287 if (appendix.is_null()) tty->print_cr("(none)"); |
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288 else appendix->print_on(tty); |
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289 } |
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290 if (result.not_null()) { |
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291 #ifdef ASSERT |
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292 TempNewSymbol basic_signature = |
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293 MethodHandles::lookup_basic_type_signature(full_signature, CHECK); |
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294 int actual_size_of_params = result->size_of_parameters(); |
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295 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size(); |
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296 // +1 for MethodHandle.this, +1 for trailing MethodType |
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297 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1; |
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298 if (appendix.not_null()) expected_size_of_params += 1; |
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299 if (actual_size_of_params != expected_size_of_params) { |
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300 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string()); |
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301 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid)); |
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302 result->print(); |
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303 } |
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304 assert(actual_size_of_params == expected_size_of_params, |
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305 err_msg("%d != %d", actual_size_of_params, expected_size_of_params)); |
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306 #endif //ASSERT |
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307 |
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308 assert(appendix_result_or_null != NULL, ""); |
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309 (*appendix_result_or_null) = appendix; |
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310 return; |
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311 } |
| 710 | 312 } |
| 313 } | |
| 314 } | |
| 315 | |
| 0 | 316 void LinkResolver::check_method_accessability(KlassHandle ref_klass, |
| 317 KlassHandle resolved_klass, | |
| 318 KlassHandle sel_klass, | |
| 319 methodHandle sel_method, | |
| 320 TRAPS) { | |
| 321 | |
| 322 AccessFlags flags = sel_method->access_flags(); | |
| 323 | |
| 324 // Special case: arrays always override "clone". JVMS 2.15. | |
| 325 // If the resolved klass is an array class, and the declaring class | |
| 326 // is java.lang.Object and the method is "clone", set the flags | |
| 327 // to public. | |
| 328 // | |
| 329 // We'll check for the method name first, as that's most likely | |
| 330 // to be false (so we'll short-circuit out of these tests). | |
| 331 if (sel_method->name() == vmSymbols::clone_name() && | |
| 1142 | 332 sel_klass() == SystemDictionary::Object_klass() && |
| 0 | 333 resolved_klass->oop_is_array()) { |
| 334 // We need to change "protected" to "public". | |
| 335 assert(flags.is_protected(), "clone not protected?"); | |
| 336 jint new_flags = flags.as_int(); | |
| 337 new_flags = new_flags & (~JVM_ACC_PROTECTED); | |
| 338 new_flags = new_flags | JVM_ACC_PUBLIC; | |
| 339 flags.set_flags(new_flags); | |
| 340 } | |
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341 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument"); |
| 0 | 342 |
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343 if (!Reflection::verify_field_access(ref_klass(), |
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344 resolved_klass(), |
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345 sel_klass(), |
| 0 | 346 flags, |
| 347 true)) { | |
| 348 ResourceMark rm(THREAD); | |
| 349 Exceptions::fthrow( | |
| 350 THREAD_AND_LOCATION, | |
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351 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 352 "tried to access method %s.%s%s from class %s", |
| 353 sel_klass->external_name(), | |
| 354 sel_method->name()->as_C_string(), | |
| 355 sel_method->signature()->as_C_string(), | |
| 356 ref_klass->external_name() | |
| 357 ); | |
| 358 return; | |
| 359 } | |
| 360 } | |
| 361 | |
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362 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass, |
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363 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) { |
| 0 | 364 |
| 365 // resolve klass | |
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366 if (code == Bytecodes::_invokedynamic) { |
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367 resolved_klass = SystemDictionary::MethodHandle_klass(); |
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368 Symbol* method_name = vmSymbols::invoke_name(); |
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369 Symbol* method_signature = pool->signature_ref_at(index); |
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370 KlassHandle current_klass(THREAD, pool->pool_holder()); |
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371 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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372 return; |
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373 } |
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374 |
| 0 | 375 resolve_klass(resolved_klass, pool, index, CHECK); |
| 376 | |
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377 Symbol* method_name = pool->name_ref_at(index); |
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378 Symbol* method_signature = pool->signature_ref_at(index); |
| 0 | 379 KlassHandle current_klass(THREAD, pool->pool_holder()); |
| 380 | |
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381 if (pool->has_preresolution() |
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382 || (resolved_klass() == SystemDictionary::MethodHandle_klass() && |
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383 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) { |
|
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384 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index); |
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385 if (result_oop != NULL) { |
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386 resolved_method = methodHandle(THREAD, result_oop); |
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387 return; |
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388 } |
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389 } |
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390 |
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391 if (code == Bytecodes::_invokeinterface) { |
|
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392 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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393 } else { |
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394 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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395 } |
| 0 | 396 } |
| 397 | |
| 398 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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399 Symbol* method_name, Symbol* method_signature, |
| 0 | 400 KlassHandle current_klass, bool check_access, TRAPS) { |
| 401 | |
| 402 // 1. check if klass is not interface | |
| 403 if (resolved_klass->is_interface()) { | |
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404 ResourceMark rm(THREAD); |
| 0 | 405 char buf[200]; |
| 406 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name()); | |
| 407 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 408 } | |
| 409 | |
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410 Handle nested_exception; |
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411 |
| 0 | 412 // 2. lookup method in resolved klass and its super klasses |
| 413 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
| 414 | |
| 415 if (resolved_method.is_null()) { // not found in the class hierarchy | |
| 416 // 3. lookup method in all the interfaces implemented by the resolved klass | |
| 417 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
| 418 | |
| 419 if (resolved_method.is_null()) { | |
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420 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc |
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421 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature, |
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422 current_klass, (Handle*)NULL, THREAD); |
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423 if (HAS_PENDING_EXCEPTION) { |
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424 nested_exception = Handle(THREAD, PENDING_EXCEPTION); |
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425 CLEAR_PENDING_EXCEPTION; |
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426 } |
| 710 | 427 } |
| 428 | |
| 429 if (resolved_method.is_null()) { | |
| 0 | 430 // 4. method lookup failed |
| 431 ResourceMark rm(THREAD); | |
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432 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(), |
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433 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
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434 method_name, |
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435 method_signature), |
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436 nested_exception); |
| 0 | 437 } |
| 438 } | |
| 439 | |
| 440 // 5. check if method is concrete | |
| 441 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { | |
| 442 ResourceMark rm(THREAD); | |
| 443 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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444 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
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445 method_name, |
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446 method_signature)); |
| 0 | 447 } |
| 448 | |
| 449 // 6. access checks, access checking may be turned off when calling from within the VM. | |
| 450 if (check_access) { | |
| 451 assert(current_klass.not_null() , "current_klass should not be null"); | |
| 452 | |
| 453 // check if method can be accessed by the referring class | |
| 454 check_method_accessability(current_klass, | |
| 455 resolved_klass, | |
| 456 KlassHandle(THREAD, resolved_method->method_holder()), | |
| 457 resolved_method, | |
| 458 CHECK); | |
| 459 | |
| 460 // check loader constraints | |
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461 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); |
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462 Handle class_loader (THREAD, InstanceKlass::cast(resolved_method->method_holder())->class_loader()); |
| 0 | 463 { |
| 464 ResourceMark rm(THREAD); | |
| 465 char* failed_type_name = | |
| 466 SystemDictionary::check_signature_loaders(method_signature, loader, | |
| 467 class_loader, true, CHECK); | |
| 468 if (failed_type_name != NULL) { | |
| 469 const char* msg = "loader constraint violation: when resolving method" | |
| 470 " \"%s\" the class loader (instance of %s) of the current class, %s," | |
| 471 " and the class loader (instance of %s) for resolved class, %s, have" | |
| 472 " different Class objects for the type %s used in the signature"; | |
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473 char* sig = Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); |
| 0 | 474 const char* loader1 = SystemDictionary::loader_name(loader()); |
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475 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); |
| 0 | 476 const char* loader2 = SystemDictionary::loader_name(class_loader()); |
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477 char* resolved = InstanceKlass::cast(resolved_klass())->name()->as_C_string(); |
| 0 | 478 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
| 479 strlen(current) + strlen(loader2) + strlen(resolved) + | |
| 480 strlen(failed_type_name); | |
| 481 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
| 482 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
| 483 resolved, failed_type_name); | |
| 484 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
| 485 } | |
| 486 } | |
| 487 } | |
| 488 } | |
| 489 | |
| 490 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, | |
| 491 KlassHandle resolved_klass, | |
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492 Symbol* method_name, |
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493 Symbol* method_signature, |
| 0 | 494 KlassHandle current_klass, |
| 495 bool check_access, TRAPS) { | |
| 496 | |
| 497 // check if klass is interface | |
| 498 if (!resolved_klass->is_interface()) { | |
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499 ResourceMark rm(THREAD); |
| 0 | 500 char buf[200]; |
| 501 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name()); | |
| 502 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 503 } | |
| 504 | |
| 505 // lookup method in this interface or its super, java.lang.Object | |
| 506 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
| 507 | |
| 508 if (resolved_method.is_null()) { | |
| 509 // lookup method in all the super-interfaces | |
| 510 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
| 511 if (resolved_method.is_null()) { | |
| 512 // no method found | |
| 513 ResourceMark rm(THREAD); | |
| 514 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), | |
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515 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
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516 method_name, |
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517 method_signature)); |
| 0 | 518 } |
| 519 } | |
| 520 | |
| 521 if (check_access) { | |
| 522 HandleMark hm(THREAD); | |
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523 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); |
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524 Handle class_loader (THREAD, InstanceKlass::cast(resolved_method->method_holder())->class_loader()); |
| 0 | 525 { |
| 526 ResourceMark rm(THREAD); | |
| 527 char* failed_type_name = | |
| 528 SystemDictionary::check_signature_loaders(method_signature, loader, | |
| 529 class_loader, true, CHECK); | |
| 530 if (failed_type_name != NULL) { | |
| 531 const char* msg = "loader constraint violation: when resolving " | |
| 532 "interface method \"%s\" the class loader (instance of %s) of the " | |
| 533 "current class, %s, and the class loader (instance of %s) for " | |
| 534 "resolved class, %s, have different Class objects for the type %s " | |
| 535 "used in the signature"; | |
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536 char* sig = Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); |
| 0 | 537 const char* loader1 = SystemDictionary::loader_name(loader()); |
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538 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); |
| 0 | 539 const char* loader2 = SystemDictionary::loader_name(class_loader()); |
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540 char* resolved = InstanceKlass::cast(resolved_klass())->name()->as_C_string(); |
| 0 | 541 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
| 542 strlen(current) + strlen(loader2) + strlen(resolved) + | |
| 543 strlen(failed_type_name); | |
| 544 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
| 545 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
| 546 resolved, failed_type_name); | |
| 547 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
| 548 } | |
| 549 } | |
| 550 } | |
| 551 } | |
| 552 | |
| 553 //------------------------------------------------------------------------------------------------------------------------ | |
| 554 // Field resolution | |
| 555 | |
| 556 void LinkResolver::check_field_accessability(KlassHandle ref_klass, | |
| 557 KlassHandle resolved_klass, | |
| 558 KlassHandle sel_klass, | |
| 559 fieldDescriptor& fd, | |
| 560 TRAPS) { | |
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561 if (!Reflection::verify_field_access(ref_klass(), |
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562 resolved_klass(), |
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563 sel_klass(), |
| 0 | 564 fd.access_flags(), |
| 565 true)) { | |
| 566 ResourceMark rm(THREAD); | |
| 567 Exceptions::fthrow( | |
| 568 THREAD_AND_LOCATION, | |
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569 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 570 "tried to access field %s.%s from class %s", |
| 571 sel_klass->external_name(), | |
| 572 fd.name()->as_C_string(), | |
| 573 ref_klass->external_name() | |
| 574 ); | |
| 575 return; | |
| 576 } | |
| 577 } | |
| 578 | |
| 579 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) { | |
| 580 resolve_field(result, pool, index, byte, check_only, true, CHECK); | |
| 581 } | |
| 582 | |
| 583 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) { | |
| 584 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || | |
| 585 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode"); | |
| 586 | |
| 587 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); | |
| 588 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); | |
| 589 | |
| 590 // resolve specified klass | |
| 591 KlassHandle resolved_klass; | |
| 592 if (update_pool) { | |
| 593 resolve_klass(resolved_klass, pool, index, CHECK); | |
| 594 } else { | |
| 595 resolve_klass_no_update(resolved_klass, pool, index, CHECK); | |
| 596 } | |
| 597 // Load these early in case the resolve of the containing klass fails | |
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598 Symbol* field = pool->name_ref_at(index); |
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599 Symbol* sig = pool->signature_ref_at(index); |
| 0 | 600 // Check if there's a resolved klass containing the field |
| 601 if( resolved_klass.is_null() ) { | |
| 602 ResourceMark rm(THREAD); | |
| 603 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
| 604 } | |
| 605 | |
| 606 // Resolve instance field | |
| 607 fieldDescriptor fd; // find_field initializes fd if found | |
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608 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); |
| 0 | 609 // check if field exists; i.e., if a klass containing the field def has been selected |
| 610 if (sel_klass.is_null()){ | |
| 611 ResourceMark rm(THREAD); | |
| 612 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
| 613 } | |
| 614 | |
| 615 // check access | |
| 616 KlassHandle ref_klass(THREAD, pool->pool_holder()); | |
| 617 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK); | |
| 618 | |
| 619 // check for errors | |
| 620 if (is_static != fd.is_static()) { | |
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621 ResourceMark rm(THREAD); |
| 0 | 622 char msg[200]; |
| 623 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()); | |
| 624 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); | |
| 625 } | |
| 626 | |
| 627 // Final fields can only be accessed from its own class. | |
| 628 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) { | |
| 629 THROW(vmSymbols::java_lang_IllegalAccessError()); | |
| 630 } | |
| 631 | |
| 632 // initialize resolved_klass if necessary | |
| 633 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) | |
| 634 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) | |
| 635 // | |
| 636 // note 2: we don't want to force initialization if we are just checking | |
| 637 // if the field access is legal; e.g., during compilation | |
| 638 if (is_static && !check_only) { | |
| 639 sel_klass->initialize(CHECK); | |
| 640 } | |
| 641 | |
| 642 { | |
| 643 HandleMark hm(THREAD); | |
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644 Handle ref_loader (THREAD, InstanceKlass::cast(ref_klass())->class_loader()); |
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645 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader()); |
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646 Symbol* signature_ref = pool->signature_ref_at(index); |
| 0 | 647 { |
| 648 ResourceMark rm(THREAD); | |
| 649 char* failed_type_name = | |
| 650 SystemDictionary::check_signature_loaders(signature_ref, | |
| 651 ref_loader, sel_loader, | |
| 652 false, | |
| 653 CHECK); | |
| 654 if (failed_type_name != NULL) { | |
| 655 const char* msg = "loader constraint violation: when resolving field" | |
| 656 " \"%s\" the class loader (instance of %s) of the referring class, " | |
| 657 "%s, and the class loader (instance of %s) for the field's resolved " | |
| 658 "type, %s, have different Class objects for that type"; | |
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659 char* field_name = field->as_C_string(); |
| 0 | 660 const char* loader1 = SystemDictionary::loader_name(ref_loader()); |
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661 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string(); |
| 0 | 662 const char* loader2 = SystemDictionary::loader_name(sel_loader()); |
| 663 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + | |
| 664 strlen(sel) + strlen(loader2) + strlen(failed_type_name); | |
| 665 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
| 666 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, | |
| 667 failed_type_name); | |
| 668 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
| 669 } | |
| 670 } | |
| 671 } | |
| 672 | |
| 673 // return information. note that the klass is set to the actual klass containing the | |
| 674 // field, otherwise access of static fields in superclasses will not work. | |
| 675 KlassHandle holder (THREAD, fd.field_holder()); | |
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676 Symbol* name = fd.name(); |
| 0 | 677 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags()); |
| 678 } | |
| 679 | |
| 680 | |
| 681 //------------------------------------------------------------------------------------------------------------------------ | |
| 682 // Invoke resolution | |
| 683 // | |
| 684 // Naming conventions: | |
| 685 // | |
| 686 // resolved_method the specified method (i.e., static receiver specified via constant pool index) | |
| 687 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) | |
| 688 // resolved_klass the specified klass (i.e., specified via constant pool index) | |
| 689 // recv_klass the receiver klass | |
| 690 | |
| 691 | |
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692 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, |
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693 Symbol* method_signature, KlassHandle current_klass, |
| 0 | 694 bool check_access, bool initialize_class, TRAPS) { |
| 695 methodHandle resolved_method; | |
| 696 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 697 resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder())); | |
| 698 | |
| 699 // Initialize klass (this should only happen if everything is ok) | |
| 700 if (initialize_class && resolved_klass->should_be_initialized()) { | |
| 701 resolved_klass->initialize(CHECK); | |
| 702 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 703 } | |
| 704 | |
| 705 // setup result | |
| 706 result.set_static(resolved_klass, resolved_method, CHECK); | |
| 707 } | |
| 708 | |
| 709 // throws linktime exceptions | |
| 710 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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711 Symbol* method_name, Symbol* method_signature, |
| 0 | 712 KlassHandle current_klass, bool check_access, TRAPS) { |
| 713 | |
| 714 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 715 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); | |
| 716 | |
| 717 // check if static | |
| 718 if (!resolved_method->is_static()) { | |
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719 ResourceMark rm(THREAD); |
| 0 | 720 char buf[200]; |
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721 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 722 resolved_method->name(), |
| 723 resolved_method->signature())); | |
| 724 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 725 } | |
| 726 } | |
| 727 | |
| 728 | |
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729 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, |
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730 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
| 0 | 731 methodHandle resolved_method; |
| 732 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 733 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); | |
| 734 } | |
| 735 | |
| 736 // throws linktime exceptions | |
| 737 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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738 Symbol* method_name, Symbol* method_signature, |
| 0 | 739 KlassHandle current_klass, bool check_access, TRAPS) { |
| 740 | |
| 741 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 742 | |
| 743 // check if method name is <init>, that it is found in same klass as static type | |
| 744 if (resolved_method->name() == vmSymbols::object_initializer_name() && | |
| 745 resolved_method->method_holder() != resolved_klass()) { | |
| 746 ResourceMark rm(THREAD); | |
| 747 Exceptions::fthrow( | |
| 748 THREAD_AND_LOCATION, | |
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749 vmSymbols::java_lang_NoSuchMethodError(), |
| 0 | 750 "%s: method %s%s not found", |
| 751 resolved_klass->external_name(), | |
| 752 resolved_method->name()->as_C_string(), | |
| 753 resolved_method->signature()->as_C_string() | |
| 754 ); | |
| 755 return; | |
| 756 } | |
| 757 | |
| 758 // check if not static | |
| 759 if (resolved_method->is_static()) { | |
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760 ResourceMark rm(THREAD); |
| 0 | 761 char buf[200]; |
| 762 jio_snprintf(buf, sizeof(buf), | |
| 763 "Expecting non-static method %s", | |
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764 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 765 resolved_method->name(), |
| 766 resolved_method->signature())); | |
| 767 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 768 } | |
| 769 } | |
| 770 | |
| 771 // throws runtime exceptions | |
| 772 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
| 773 KlassHandle current_klass, bool check_access, TRAPS) { | |
| 774 | |
| 775 // resolved method is selected method unless we have an old-style lookup | |
| 776 methodHandle sel_method(THREAD, resolved_method()); | |
| 777 | |
| 778 // check if this is an old-style super call and do a new lookup if so | |
| 779 { KlassHandle method_klass = KlassHandle(THREAD, | |
| 780 resolved_method->method_holder()); | |
| 781 | |
| 782 if (check_access && | |
| 783 // a) check if ACC_SUPER flag is set for the current class | |
| 784 current_klass->is_super() && | |
| 785 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!) | |
| 786 current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() && | |
| 787 // c) check if the method is not <init> | |
| 788 resolved_method->name() != vmSymbols::object_initializer_name()) { | |
| 789 // Lookup super method | |
| 790 KlassHandle super_klass(THREAD, current_klass->super()); | |
| 791 lookup_instance_method_in_klasses(sel_method, super_klass, | |
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792 resolved_method->name(), |
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793 resolved_method->signature(), CHECK); |
| 0 | 794 // check if found |
| 795 if (sel_method.is_null()) { | |
| 796 ResourceMark rm(THREAD); | |
| 797 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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798 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 799 resolved_method->name(), |
| 800 resolved_method->signature())); | |
| 801 } | |
| 802 } | |
| 803 } | |
| 804 | |
| 805 // check if not static | |
| 806 if (sel_method->is_static()) { | |
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807 ResourceMark rm(THREAD); |
| 0 | 808 char buf[200]; |
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809 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 810 resolved_method->name(), |
| 811 resolved_method->signature())); | |
| 812 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 813 } | |
| 814 | |
| 815 // check if abstract | |
| 816 if (sel_method->is_abstract()) { | |
| 817 ResourceMark rm(THREAD); | |
| 818 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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819 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 820 sel_method->name(), |
| 821 sel_method->signature())); | |
| 822 } | |
| 823 | |
| 824 // setup result | |
| 825 result.set_static(resolved_klass, sel_method, CHECK); | |
| 826 } | |
| 827 | |
| 828 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, | |
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829 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
| 0 | 830 bool check_access, bool check_null_and_abstract, TRAPS) { |
| 831 methodHandle resolved_method; | |
| 832 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 833 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); | |
| 834 } | |
| 835 | |
| 836 // throws linktime exceptions | |
| 837 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, | |
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838 Symbol* method_name, Symbol* method_signature, |
| 0 | 839 KlassHandle current_klass, bool check_access, TRAPS) { |
| 840 // normal method resolution | |
| 841 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 842 | |
| 843 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
| 844 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
| 845 | |
| 846 // check if not static | |
| 847 if (resolved_method->is_static()) { | |
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848 ResourceMark rm(THREAD); |
| 0 | 849 char buf[200]; |
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850 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 851 resolved_method->name(), |
| 852 resolved_method->signature())); | |
| 853 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 854 } | |
| 855 } | |
| 856 | |
| 857 // throws runtime exceptions | |
| 858 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, | |
| 859 methodHandle resolved_method, | |
| 860 KlassHandle resolved_klass, | |
| 861 Handle recv, | |
| 862 KlassHandle recv_klass, | |
| 863 bool check_null_and_abstract, | |
| 864 TRAPS) { | |
| 865 | |
| 866 // setup default return values | |
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867 int vtable_index = Method::invalid_vtable_index; |
| 0 | 868 methodHandle selected_method; |
| 869 | |
| 870 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); | |
| 871 | |
| 872 // runtime method resolution | |
| 873 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists | |
| 874 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 875 } | |
| 876 | |
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877 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s |
| 0 | 878 // has not been rewritten, and the vtable initialized. |
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879 assert(InstanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); |
| 0 | 880 |
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881 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s |
| 0 | 882 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since |
| 883 // a missing receiver might result in a bogus lookup. | |
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884 assert(InstanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); |
| 0 | 885 |
| 886 // do lookup based on receiver klass using the vtable index | |
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887 if (resolved_method->method_holder()->is_interface()) { // miranda method |
| 0 | 888 vtable_index = vtable_index_of_miranda_method(resolved_klass, |
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889 resolved_method->name(), |
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890 resolved_method->signature(), CHECK); |
| 0 | 891 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); |
| 892 | |
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893 InstanceKlass* inst = InstanceKlass::cast(recv_klass()); |
| 0 | 894 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); |
| 895 } else { | |
| 896 // at this point we are sure that resolved_method is virtual and not | |
| 897 // a miranda method; therefore, it must have a valid vtable index. | |
| 898 vtable_index = resolved_method->vtable_index(); | |
| 899 // We could get a negative vtable_index for final methods, | |
| 900 // because as an optimization they are they are never put in the vtable, | |
| 901 // unless they override an existing method. | |
| 902 // If we do get a negative, it means the resolved method is the the selected | |
| 903 // method, and it can never be changed by an override. | |
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904 if (vtable_index == Method::nonvirtual_vtable_index) { |
| 0 | 905 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); |
| 906 selected_method = resolved_method; | |
| 907 } else { | |
| 908 // recv_klass might be an arrayKlassOop but all vtables start at | |
| 909 // the same place. The cast is to avoid virtual call and assertion. | |
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910 InstanceKlass* inst = (InstanceKlass*)recv_klass(); |
| 0 | 911 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); |
| 912 } | |
| 913 } | |
| 914 | |
| 915 // check if method exists | |
| 916 if (selected_method.is_null()) { | |
| 917 ResourceMark rm(THREAD); | |
| 918 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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919 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 920 resolved_method->name(), |
| 921 resolved_method->signature())); | |
| 922 } | |
| 923 | |
| 924 // check if abstract | |
| 925 if (check_null_and_abstract && selected_method->is_abstract()) { | |
| 926 ResourceMark rm(THREAD); | |
| 927 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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928 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()), |
| 0 | 929 selected_method->name(), |
| 930 selected_method->signature())); | |
| 931 } | |
| 932 | |
| 933 // setup result | |
| 934 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); | |
| 935 } | |
| 936 | |
| 937 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, | |
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938 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
| 0 | 939 bool check_access, bool check_null_and_abstract, TRAPS) { |
| 940 methodHandle resolved_method; | |
| 941 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 942 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); | |
| 943 } | |
| 944 | |
| 945 // throws linktime exceptions | |
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946 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, |
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947 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
| 0 | 948 // normal interface method resolution |
| 949 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 950 | |
| 951 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
| 952 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
| 953 } | |
| 954 | |
| 955 // throws runtime exceptions | |
| 956 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
| 957 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { | |
| 958 // check if receiver exists | |
| 959 if (check_null_and_abstract && recv.is_null()) { | |
| 960 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 961 } | |
| 962 | |
| 963 // check if receiver klass implements the resolved interface | |
| 964 if (!recv_klass->is_subtype_of(resolved_klass())) { | |
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965 ResourceMark rm(THREAD); |
| 0 | 966 char buf[200]; |
| 967 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", | |
| 968 (Klass::cast(recv_klass()))->external_name(), | |
| 969 (Klass::cast(resolved_klass()))->external_name()); | |
| 970 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 971 } | |
| 972 // do lookup based on receiver klass | |
| 973 methodHandle sel_method; | |
| 974 lookup_instance_method_in_klasses(sel_method, recv_klass, | |
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975 resolved_method->name(), |
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976 resolved_method->signature(), CHECK); |
| 0 | 977 // check if method exists |
| 978 if (sel_method.is_null()) { | |
| 979 ResourceMark rm(THREAD); | |
| 980 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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981 Method::name_and_sig_as_C_string(Klass::cast(recv_klass()), |
| 0 | 982 resolved_method->name(), |
| 983 resolved_method->signature())); | |
| 984 } | |
| 985 // check if public | |
| 986 if (!sel_method->is_public()) { | |
| 987 ResourceMark rm(THREAD); | |
| 988 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), | |
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989 Method::name_and_sig_as_C_string(Klass::cast(recv_klass()), |
| 0 | 990 sel_method->name(), |
| 991 sel_method->signature())); | |
| 992 } | |
| 993 // check if abstract | |
| 994 if (check_null_and_abstract && sel_method->is_abstract()) { | |
| 995 ResourceMark rm(THREAD); | |
| 996 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
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997 Method::name_and_sig_as_C_string(Klass::cast(recv_klass()), |
| 0 | 998 sel_method->name(), |
| 999 sel_method->signature())); | |
| 1000 } | |
| 1001 // setup result | |
| 1002 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK); | |
| 1003 } | |
| 1004 | |
| 1005 | |
| 1006 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( | |
| 1007 KlassHandle resolved_klass, | |
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1008 Symbol* method_name, |
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1009 Symbol* method_signature, |
| 0 | 1010 KlassHandle current_klass, |
| 1011 bool check_access) { | |
| 1012 EXCEPTION_MARK; | |
| 1013 methodHandle method_result; | |
| 1014 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
| 1015 if (HAS_PENDING_EXCEPTION) { | |
| 1016 CLEAR_PENDING_EXCEPTION; | |
| 1017 return methodHandle(); | |
| 1018 } else { | |
| 1019 return method_result; | |
| 1020 } | |
| 1021 } | |
| 1022 | |
| 1023 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( | |
| 1024 KlassHandle resolved_klass, | |
|
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1025 Symbol* method_name, |
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1026 Symbol* method_signature, |
| 0 | 1027 KlassHandle current_klass, |
| 1028 bool check_access) { | |
| 1029 EXCEPTION_MARK; | |
| 1030 methodHandle method_result; | |
| 1031 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
| 1032 if (HAS_PENDING_EXCEPTION) { | |
| 1033 CLEAR_PENDING_EXCEPTION; | |
| 1034 return methodHandle(); | |
| 1035 } else { | |
| 1036 return method_result; | |
| 1037 } | |
| 1038 } | |
| 1039 | |
| 1040 methodHandle LinkResolver::resolve_virtual_call_or_null( | |
| 1041 KlassHandle receiver_klass, | |
| 1042 KlassHandle resolved_klass, | |
|
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1043 Symbol* name, |
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1044 Symbol* signature, |
| 0 | 1045 KlassHandle current_klass) { |
| 1046 EXCEPTION_MARK; | |
| 1047 CallInfo info; | |
| 1048 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1049 if (HAS_PENDING_EXCEPTION) { | |
| 1050 CLEAR_PENDING_EXCEPTION; | |
| 1051 return methodHandle(); | |
| 1052 } | |
| 1053 return info.selected_method(); | |
| 1054 } | |
| 1055 | |
| 1056 methodHandle LinkResolver::resolve_interface_call_or_null( | |
| 1057 KlassHandle receiver_klass, | |
| 1058 KlassHandle resolved_klass, | |
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1059 Symbol* name, |
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1060 Symbol* signature, |
| 0 | 1061 KlassHandle current_klass) { |
| 1062 EXCEPTION_MARK; | |
| 1063 CallInfo info; | |
| 1064 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1065 if (HAS_PENDING_EXCEPTION) { | |
| 1066 CLEAR_PENDING_EXCEPTION; | |
| 1067 return methodHandle(); | |
| 1068 } | |
| 1069 return info.selected_method(); | |
| 1070 } | |
| 1071 | |
| 1072 int LinkResolver::resolve_virtual_vtable_index( | |
| 1073 KlassHandle receiver_klass, | |
| 1074 KlassHandle resolved_klass, | |
|
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1075 Symbol* name, |
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1076 Symbol* signature, |
| 0 | 1077 KlassHandle current_klass) { |
| 1078 EXCEPTION_MARK; | |
| 1079 CallInfo info; | |
| 1080 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1081 if (HAS_PENDING_EXCEPTION) { | |
| 1082 CLEAR_PENDING_EXCEPTION; | |
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1083 return Method::invalid_vtable_index; |
| 0 | 1084 } |
| 1085 return info.vtable_index(); | |
| 1086 } | |
| 1087 | |
| 1088 methodHandle LinkResolver::resolve_static_call_or_null( | |
| 1089 KlassHandle resolved_klass, | |
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1090 Symbol* name, |
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1091 Symbol* signature, |
| 0 | 1092 KlassHandle current_klass) { |
| 1093 EXCEPTION_MARK; | |
| 1094 CallInfo info; | |
| 1095 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1096 if (HAS_PENDING_EXCEPTION) { | |
| 1097 CLEAR_PENDING_EXCEPTION; | |
| 1098 return methodHandle(); | |
| 1099 } | |
| 1100 return info.selected_method(); | |
| 1101 } | |
| 1102 | |
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1103 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, |
| 0 | 1104 KlassHandle current_klass) { |
| 1105 EXCEPTION_MARK; | |
| 1106 CallInfo info; | |
| 1107 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); | |
| 1108 if (HAS_PENDING_EXCEPTION) { | |
| 1109 CLEAR_PENDING_EXCEPTION; | |
| 1110 return methodHandle(); | |
| 1111 } | |
| 1112 return info.selected_method(); | |
| 1113 } | |
| 1114 | |
| 1115 | |
| 1116 | |
| 1117 //------------------------------------------------------------------------------------------------------------------------ | |
| 1118 // ConstantPool entries | |
| 1119 | |
| 1120 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { | |
| 1121 switch (byte) { | |
| 1122 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; | |
| 1123 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; | |
| 1124 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; | |
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1125 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break; |
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1126 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; |
| 0 | 1127 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; |
| 1128 } | |
| 1129 return; | |
| 1130 } | |
| 1131 | |
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1132 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, |
| 0 | 1133 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { |
| 1134 // resolve klass | |
| 1135 resolve_klass(resolved_klass, pool, index, CHECK); | |
| 1136 | |
| 1137 // Get name, signature, and static klass | |
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1138 method_name = pool->name_ref_at(index); |
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1139 method_signature = pool->signature_ref_at(index); |
| 0 | 1140 current_klass = KlassHandle(THREAD, pool->pool_holder()); |
| 1141 } | |
| 1142 | |
| 1143 | |
| 1144 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
| 1145 KlassHandle resolved_klass; | |
|
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1146 Symbol* method_name = NULL; |
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1147 Symbol* method_signature = NULL; |
| 0 | 1148 KlassHandle current_klass; |
| 1149 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
| 1150 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
| 1151 } | |
| 1152 | |
| 1153 | |
| 1154 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
| 1155 KlassHandle resolved_klass; | |
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1156 Symbol* method_name = NULL; |
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1157 Symbol* method_signature = NULL; |
| 0 | 1158 KlassHandle current_klass; |
| 1159 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
| 1160 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
| 1161 } | |
| 1162 | |
| 1163 | |
| 1164 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, | |
| 1165 constantPoolHandle pool, int index, | |
| 1166 TRAPS) { | |
| 1167 | |
| 1168 KlassHandle resolved_klass; | |
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1169 Symbol* method_name = NULL; |
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1170 Symbol* method_signature = NULL; |
| 0 | 1171 KlassHandle current_klass; |
| 1172 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
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1173 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); |
| 0 | 1174 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); |
| 1175 } | |
| 1176 | |
| 1177 | |
| 1178 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, 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); | |
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1184 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); |
| 0 | 1185 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); |
| 1186 } | |
| 1187 | |
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1188 |
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1189 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { |
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1190 assert(EnableInvokeDynamic, ""); |
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1191 // This guy is reached from InterpreterRuntime::resolve_invokehandle. |
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1192 KlassHandle resolved_klass; |
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1193 Symbol* method_name = NULL; |
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1194 Symbol* method_signature = NULL; |
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1195 KlassHandle current_klass; |
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1196 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); |
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1197 if (TraceMethodHandles) |
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1198 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string()); |
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1199 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK); |
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1200 } |
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1201 |
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1202 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass, |
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1203 Symbol* method_name, Symbol* method_signature, |
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1204 KlassHandle current_klass, |
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1205 TRAPS) { |
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1206 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar |
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1207 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), ""); |
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1208 assert(MethodHandles::is_signature_polymorphic_name(method_name), ""); |
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1209 methodHandle resolved_method; |
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1210 Handle resolved_appendix; |
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1211 lookup_polymorphic_method(resolved_method, resolved_klass, |
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1212 method_name, method_signature, |
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1213 current_klass, &resolved_appendix, CHECK); |
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1214 result.set_handle(resolved_method, resolved_appendix, CHECK); |
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1215 } |
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1216 |
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1217 |
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1218 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { |
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1219 assert(EnableInvokeDynamic, ""); |
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1220 pool->set_invokedynamic(); // mark header to flag active call sites |
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1221 |
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1222 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK); |
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1223 Symbol* method_name = pool->name_ref_at(index); |
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1224 Symbol* method_signature = pool->signature_ref_at(index); |
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1225 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder()); |
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1226 |
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1227 // Resolve the bootstrap specifier (BSM + optional arguments). |
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1228 Handle bootstrap_specifier; |
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1229 // Check if CallSite has been bound already: |
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1230 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index); |
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1231 if (cpce->is_f1_null()) { |
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1232 int pool_index = cpce->constant_pool_index(); |
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1233 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK); |
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1234 assert(bsm_info != NULL, ""); |
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1235 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic. |
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1236 bootstrap_specifier = Handle(THREAD, bsm_info); |
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1237 } |
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1238 if (!cpce->is_f1_null()) { |
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1239 methodHandle method(THREAD, cpce->f1_as_method()); |
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1240 Handle appendix(THREAD, cpce->appendix_if_resolved(pool)); |
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1241 result.set_handle(method, appendix, CHECK); |
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1242 return; |
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1243 } |
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1244 |
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1245 if (TraceMethodHandles) { |
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1246 tty->print_cr("resolve_invokedynamic #%d %s %s", |
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1247 ConstantPool::decode_invokedynamic_index(index), |
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1248 method_name->as_C_string(), method_signature->as_C_string()); |
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1249 tty->print(" BSM info: "); bootstrap_specifier->print(); |
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1250 } |
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1251 |
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1252 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK); |
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1253 } |
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1254 |
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1255 void LinkResolver::resolve_dynamic_call(CallInfo& result, |
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1256 Handle bootstrap_specifier, |
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1257 Symbol* method_name, Symbol* method_signature, |
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1258 KlassHandle current_klass, |
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1259 TRAPS) { |
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1260 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...) |
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1261 // The appendix argument is likely to be a freshly-created CallSite. |
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1262 Handle resolved_appendix; |
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1263 methodHandle resolved_method = |
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1264 SystemDictionary::find_dynamic_call_site_invoker(current_klass, |
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1265 bootstrap_specifier, |
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1266 method_name, method_signature, |
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1267 &resolved_appendix, |
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1268 THREAD); |
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1269 if (HAS_PENDING_EXCEPTION) { |
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1270 if (TraceMethodHandles) { |
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1271 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION); |
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1272 PENDING_EXCEPTION->print(); |
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1273 } |
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1274 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) { |
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1275 // throw these guys, since they are already wrapped |
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1276 return; |
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1277 } |
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1278 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { |
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1279 // intercept only LinkageErrors which might have failed to wrap |
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1280 return; |
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1281 } |
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1282 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS. |
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1283 Handle nested_exception(THREAD, PENDING_EXCEPTION); |
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1284 CLEAR_PENDING_EXCEPTION; |
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1285 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception) |
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1286 } |
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1287 result.set_handle(resolved_method, resolved_appendix, CHECK); |
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1288 } |
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1289 |
| 0 | 1290 //------------------------------------------------------------------------------------------------------------------------ |
| 1291 #ifndef PRODUCT | |
| 1292 | |
| 1293 void FieldAccessInfo::print() { | |
| 1294 ResourceMark rm; | |
| 1295 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset()); | |
| 1296 } | |
| 1297 | |
| 1298 #endif |