Mercurial > hg > truffle
annotate src/share/vm/interpreter/linkResolver.cpp @ 7180:f34d701e952e
8003935: Simplify the needed includes for using Thread::current()
Reviewed-by: dholmes, rbackman, coleenp
| author | stefank |
|---|---|
| date | Tue, 27 Nov 2012 14:20:21 +0100 |
| parents | 070d523b96a7 |
| children | 5daaddd917a1 b5cb079ecaa4 |
| 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" | |
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46 #include "runtime/thread.inline.hpp" |
| 1972 | 47 #include "runtime/vmThread.hpp" |
| 0 | 48 |
| 49 //------------------------------------------------------------------------------------------------------------------------ | |
| 50 // Implementation of FieldAccessInfo | |
| 51 | |
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52 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset, |
| 0 | 53 BasicType field_type, AccessFlags access_flags) { |
| 54 _klass = klass; | |
| 55 _name = name; | |
| 56 _field_index = field_index; | |
| 57 _field_offset = field_offset; | |
| 58 _field_type = field_type; | |
| 59 _access_flags = access_flags; | |
| 60 } | |
| 61 | |
| 62 | |
| 63 //------------------------------------------------------------------------------------------------------------------------ | |
| 64 // Implementation of CallInfo | |
| 65 | |
| 66 | |
| 67 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) { | |
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68 int vtable_index = Method::nonvirtual_vtable_index; |
| 0 | 69 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); |
| 70 } | |
| 71 | |
| 72 | |
| 73 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) { | |
| 74 // This is only called for interface methods. If the resolved_method | |
| 75 // comes from java/lang/Object, it can be the subject of a virtual call, so | |
| 76 // we should pick the vtable index from the resolved method. | |
| 77 // Other than that case, there is no valid vtable index to specify. | |
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78 int vtable_index = Method::invalid_vtable_index; |
| 1142 | 79 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) { |
| 0 | 80 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check"); |
| 81 vtable_index = resolved_method->vtable_index(); | |
| 82 } | |
| 83 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); | |
| 84 } | |
| 85 | |
| 86 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { | |
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87 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index"); |
| 0 | 88 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); |
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89 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call"); |
| 0 | 90 } |
| 91 | |
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92 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) { |
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93 if (resolved_method.is_null()) { |
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94 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null"); |
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95 } |
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96 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass(); |
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97 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic || |
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98 resolved_method->is_compiled_lambda_form(), |
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99 "linkMethod must return one of these"); |
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100 int vtable_index = Method::nonvirtual_vtable_index; |
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101 assert(resolved_method->vtable_index() == vtable_index, ""); |
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102 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); |
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103 _resolved_appendix = resolved_appendix; |
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104 _resolved_method_type = resolved_method_type; |
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105 } |
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106 |
| 0 | 107 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { |
| 108 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond"); | |
| 109 _resolved_klass = resolved_klass; | |
| 110 _selected_klass = selected_klass; | |
| 111 _resolved_method = resolved_method; | |
| 112 _selected_method = selected_method; | |
| 113 _vtable_index = vtable_index; | |
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114 _resolved_appendix = Handle(); |
| 1783 | 115 if (CompilationPolicy::must_be_compiled(selected_method)) { |
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116 // This path is unusual, mostly used by the '-Xcomp' stress test mode. |
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117 |
| 1783 | 118 // Note: with several active threads, the must_be_compiled may be true |
| 119 // while can_be_compiled is false; remove assert | |
| 120 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile"); | |
| 0 | 121 if (THREAD->is_Compiler_thread()) { |
| 122 // don't force compilation, resolve was on behalf of compiler | |
| 123 return; | |
| 124 } | |
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125 if (selected_method->method_holder()->is_not_initialized()) { |
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126 // 'is_not_initialized' means not only '!is_initialized', but also that |
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127 // initialization has not been started yet ('!being_initialized') |
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128 // Do not force compilation of methods in uninitialized classes. |
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129 // Note that doing this would throw an assert later, |
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130 // in CompileBroker::compile_method. |
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131 // We sometimes use the link resolver to do reflective lookups |
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132 // even before classes are initialized. |
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133 return; |
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134 } |
| 0 | 135 CompileBroker::compile_method(selected_method, InvocationEntryBci, |
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136 CompilationPolicy::policy()->initial_compile_level(), |
| 1783 | 137 methodHandle(), 0, "must_be_compiled", CHECK); |
| 0 | 138 } |
| 139 } | |
| 140 | |
| 141 | |
| 142 //------------------------------------------------------------------------------------------------------------------------ | |
| 143 // Klass resolution | |
| 144 | |
| 145 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) { | |
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146 if (!Reflection::verify_class_access(ref_klass(), |
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147 sel_klass(), |
| 0 | 148 true)) { |
| 149 ResourceMark rm(THREAD); | |
| 150 Exceptions::fthrow( | |
| 151 THREAD_AND_LOCATION, | |
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152 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 153 "tried to access class %s from class %s", |
| 154 sel_klass->external_name(), | |
| 155 ref_klass->external_name() | |
| 156 ); | |
| 157 return; | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { | |
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162 Klass* result_oop = pool->klass_ref_at(index, CHECK); |
| 0 | 163 result = KlassHandle(THREAD, result_oop); |
| 164 } | |
| 165 | |
| 166 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { | |
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167 Klass* result_oop = |
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168 ConstantPool::klass_ref_at_if_loaded_check(pool, index, CHECK); |
| 0 | 169 result = KlassHandle(THREAD, result_oop); |
| 170 } | |
| 171 | |
| 172 | |
| 173 //------------------------------------------------------------------------------------------------------------------------ | |
| 174 // Method resolution | |
| 175 // | |
| 176 // According to JVM spec. $5.4.3c & $5.4.3d | |
| 177 | |
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178 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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179 Method* result_oop = klass->uncached_lookup_method(name, signature); |
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180 if (EnableInvokeDynamic && result_oop != NULL) { |
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181 vmIntrinsics::ID iid = result_oop->intrinsic_id(); |
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182 if (MethodHandles::is_signature_polymorphic(iid)) { |
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183 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method. |
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184 return; |
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185 } |
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186 } |
| 0 | 187 result = methodHandle(THREAD, result_oop); |
| 188 } | |
| 189 | |
| 190 // returns first instance method | |
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191 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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192 Method* result_oop = klass->uncached_lookup_method(name, signature); |
| 0 | 193 result = methodHandle(THREAD, result_oop); |
| 194 while (!result.is_null() && result->is_static()) { | |
| 6983 | 195 klass = KlassHandle(THREAD, result->method_holder()->super()); |
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196 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature)); |
| 0 | 197 } |
| 198 } | |
| 199 | |
| 200 | |
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201 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
| 0 | 202 ResourceMark rm(THREAD); |
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203 klassVtable *vt = InstanceKlass::cast(klass())->vtable(); |
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204 return vt->index_of_miranda(name, signature); |
| 0 | 205 } |
| 206 | |
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207 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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208 InstanceKlass *ik = InstanceKlass::cast(klass()); |
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209 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature)); |
| 0 | 210 } |
| 211 | |
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212 void LinkResolver::lookup_polymorphic_method(methodHandle& result, |
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213 KlassHandle klass, Symbol* name, Symbol* full_signature, |
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214 KlassHandle current_klass, |
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215 Handle *appendix_result_or_null, |
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216 Handle *method_type_result, |
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217 TRAPS) { |
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218 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name); |
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219 if (TraceMethodHandles) { |
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220 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s", |
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221 vmIntrinsics::name_at(iid), klass->external_name(), |
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222 name->as_C_string(), full_signature->as_C_string()); |
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223 } |
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224 if (EnableInvokeDynamic && |
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225 klass() == SystemDictionary::MethodHandle_klass() && |
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226 iid != vmIntrinsics::_none) { |
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227 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) { |
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228 // Most of these do not need an up-call to Java to resolve, so can be done anywhere. |
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229 // Do not erase last argument type (MemberName) if it is a static linkTo method. |
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230 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid); |
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231 TempNewSymbol basic_signature = |
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232 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK); |
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233 if (TraceMethodHandles) { |
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234 tty->print_cr("lookup_polymorphic_method %s %s => basic %s", |
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235 name->as_C_string(), |
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236 full_signature->as_C_string(), |
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237 basic_signature->as_C_string()); |
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238 } |
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239 result = SystemDictionary::find_method_handle_intrinsic(iid, |
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240 basic_signature, |
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241 CHECK); |
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242 if (result.not_null()) { |
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243 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic"); |
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244 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this"); |
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245 assert(basic_signature == result->signature(), "predict the result signature"); |
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246 if (TraceMethodHandles) { |
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247 tty->print("lookup_polymorphic_method => intrinsic "); |
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248 result->print_on(tty); |
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249 } |
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250 return; |
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251 } |
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252 } else if (iid == vmIntrinsics::_invokeGeneric |
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253 && !THREAD->is_Compiler_thread() |
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254 && appendix_result_or_null != NULL) { |
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255 // This is a method with type-checking semantics. |
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256 // We will ask Java code to spin an adapter method for it. |
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257 if (!MethodHandles::enabled()) { |
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258 // Make sure the Java part of the runtime has been booted up. |
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259 Klass* natives = SystemDictionary::MethodHandleNatives_klass(); |
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260 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) { |
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261 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(), |
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262 Handle(), |
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263 Handle(), |
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264 true, |
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265 CHECK); |
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266 } |
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267 } |
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268 |
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269 Handle appendix; |
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270 Handle method_type; |
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271 result = SystemDictionary::find_method_handle_invoker(name, |
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272 full_signature, |
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273 current_klass, |
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274 &appendix, |
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275 &method_type, |
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276 CHECK); |
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277 if (TraceMethodHandles) { |
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278 tty->print("lookup_polymorphic_method => (via Java) "); |
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279 result->print_on(tty); |
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280 tty->print(" lookup_polymorphic_method => appendix = "); |
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281 if (appendix.is_null()) tty->print_cr("(none)"); |
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282 else appendix->print_on(tty); |
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283 } |
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284 if (result.not_null()) { |
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285 #ifdef ASSERT |
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286 TempNewSymbol basic_signature = |
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287 MethodHandles::lookup_basic_type_signature(full_signature, CHECK); |
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288 int actual_size_of_params = result->size_of_parameters(); |
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289 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size(); |
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290 // +1 for MethodHandle.this, +1 for trailing MethodType |
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291 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1; |
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292 if (appendix.not_null()) expected_size_of_params += 1; |
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293 if (actual_size_of_params != expected_size_of_params) { |
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294 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string()); |
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295 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid)); |
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296 result->print(); |
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297 } |
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298 assert(actual_size_of_params == expected_size_of_params, |
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299 err_msg("%d != %d", actual_size_of_params, expected_size_of_params)); |
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300 #endif //ASSERT |
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301 |
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302 assert(appendix_result_or_null != NULL, ""); |
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303 (*appendix_result_or_null) = appendix; |
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304 (*method_type_result) = method_type; |
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305 return; |
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306 } |
| 710 | 307 } |
| 308 } | |
| 309 } | |
| 310 | |
| 0 | 311 void LinkResolver::check_method_accessability(KlassHandle ref_klass, |
| 312 KlassHandle resolved_klass, | |
| 313 KlassHandle sel_klass, | |
| 314 methodHandle sel_method, | |
| 315 TRAPS) { | |
| 316 | |
| 317 AccessFlags flags = sel_method->access_flags(); | |
| 318 | |
| 319 // Special case: arrays always override "clone". JVMS 2.15. | |
| 320 // If the resolved klass is an array class, and the declaring class | |
| 321 // is java.lang.Object and the method is "clone", set the flags | |
| 322 // to public. | |
| 323 // | |
| 324 // We'll check for the method name first, as that's most likely | |
| 325 // to be false (so we'll short-circuit out of these tests). | |
| 326 if (sel_method->name() == vmSymbols::clone_name() && | |
| 1142 | 327 sel_klass() == SystemDictionary::Object_klass() && |
| 0 | 328 resolved_klass->oop_is_array()) { |
| 329 // We need to change "protected" to "public". | |
| 330 assert(flags.is_protected(), "clone not protected?"); | |
| 331 jint new_flags = flags.as_int(); | |
| 332 new_flags = new_flags & (~JVM_ACC_PROTECTED); | |
| 333 new_flags = new_flags | JVM_ACC_PUBLIC; | |
| 334 flags.set_flags(new_flags); | |
| 335 } | |
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336 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument"); |
| 0 | 337 |
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338 if (!Reflection::verify_field_access(ref_klass(), |
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339 resolved_klass(), |
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340 sel_klass(), |
| 0 | 341 flags, |
| 342 true)) { | |
| 343 ResourceMark rm(THREAD); | |
| 344 Exceptions::fthrow( | |
| 345 THREAD_AND_LOCATION, | |
|
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346 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 347 "tried to access method %s.%s%s from class %s", |
| 348 sel_klass->external_name(), | |
| 349 sel_method->name()->as_C_string(), | |
| 350 sel_method->signature()->as_C_string(), | |
| 351 ref_klass->external_name() | |
| 352 ); | |
| 353 return; | |
| 354 } | |
| 355 } | |
| 356 | |
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357 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass, |
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358 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) { |
| 0 | 359 |
| 360 // resolve klass | |
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361 if (code == Bytecodes::_invokedynamic) { |
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362 resolved_klass = SystemDictionary::MethodHandle_klass(); |
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363 Symbol* method_name = vmSymbols::invoke_name(); |
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364 Symbol* method_signature = pool->signature_ref_at(index); |
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365 KlassHandle current_klass(THREAD, pool->pool_holder()); |
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366 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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367 return; |
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368 } |
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369 |
| 0 | 370 resolve_klass(resolved_klass, pool, index, CHECK); |
| 371 | |
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372 Symbol* method_name = pool->name_ref_at(index); |
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373 Symbol* method_signature = pool->signature_ref_at(index); |
| 0 | 374 KlassHandle current_klass(THREAD, pool->pool_holder()); |
| 375 | |
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376 if (pool->has_preresolution() |
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377 || (resolved_klass() == SystemDictionary::MethodHandle_klass() && |
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378 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) { |
|
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379 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index); |
|
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380 if (result_oop != NULL) { |
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381 resolved_method = methodHandle(THREAD, result_oop); |
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382 return; |
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383 } |
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384 } |
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385 |
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386 if (code == Bytecodes::_invokeinterface) { |
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387 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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388 } else { |
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389 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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390 } |
| 0 | 391 } |
| 392 | |
| 393 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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394 Symbol* method_name, Symbol* method_signature, |
| 0 | 395 KlassHandle current_klass, bool check_access, TRAPS) { |
| 396 | |
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397 Handle nested_exception; |
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398 |
| 6934 | 399 // 1. lookup method in resolved klass and its super klasses |
| 0 | 400 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); |
| 401 | |
| 402 if (resolved_method.is_null()) { // not found in the class hierarchy | |
| 6934 | 403 // 2. lookup method in all the interfaces implemented by the resolved klass |
| 0 | 404 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); |
| 405 | |
| 406 if (resolved_method.is_null()) { | |
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407 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc |
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408 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature, |
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409 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD); |
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410 if (HAS_PENDING_EXCEPTION) { |
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411 nested_exception = Handle(THREAD, PENDING_EXCEPTION); |
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412 CLEAR_PENDING_EXCEPTION; |
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413 } |
| 710 | 414 } |
| 415 | |
| 416 if (resolved_method.is_null()) { | |
| 6934 | 417 // 3. method lookup failed |
| 0 | 418 ResourceMark rm(THREAD); |
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419 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(), |
| 6983 | 420 Method::name_and_sig_as_C_string(resolved_klass(), |
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421 method_name, |
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422 method_signature), |
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423 nested_exception); |
| 0 | 424 } |
| 425 } | |
| 426 | |
| 6934 | 427 // 4. check if klass is not interface |
| 428 if (resolved_klass->is_interface() && resolved_method->is_abstract()) { | |
| 429 ResourceMark rm(THREAD); | |
| 430 char buf[200]; | |
| 431 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", | |
| 432 resolved_klass()->external_name()); | |
| 433 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 434 } | |
| 435 | |
| 0 | 436 // 5. check if method is concrete |
| 437 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { | |
| 438 ResourceMark rm(THREAD); | |
| 439 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
| 6983 | 440 Method::name_and_sig_as_C_string(resolved_klass(), |
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441 method_name, |
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442 method_signature)); |
| 0 | 443 } |
| 444 | |
| 445 // 6. access checks, access checking may be turned off when calling from within the VM. | |
| 446 if (check_access) { | |
| 447 assert(current_klass.not_null() , "current_klass should not be null"); | |
| 448 | |
| 449 // check if method can be accessed by the referring class | |
| 450 check_method_accessability(current_klass, | |
| 451 resolved_klass, | |
| 452 KlassHandle(THREAD, resolved_method->method_holder()), | |
| 453 resolved_method, | |
| 454 CHECK); | |
| 455 | |
| 456 // check loader constraints | |
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457 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); |
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458 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); |
| 0 | 459 { |
| 460 ResourceMark rm(THREAD); | |
| 461 char* failed_type_name = | |
| 462 SystemDictionary::check_signature_loaders(method_signature, loader, | |
| 463 class_loader, true, CHECK); | |
| 464 if (failed_type_name != NULL) { | |
| 465 const char* msg = "loader constraint violation: when resolving method" | |
| 466 " \"%s\" the class loader (instance of %s) of the current class, %s," | |
| 467 " and the class loader (instance of %s) for resolved class, %s, have" | |
| 468 " different Class objects for the type %s used in the signature"; | |
| 6983 | 469 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); |
| 0 | 470 const char* loader1 = SystemDictionary::loader_name(loader()); |
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471 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); |
| 0 | 472 const char* loader2 = SystemDictionary::loader_name(class_loader()); |
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473 char* resolved = InstanceKlass::cast(resolved_klass())->name()->as_C_string(); |
| 0 | 474 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
| 475 strlen(current) + strlen(loader2) + strlen(resolved) + | |
| 476 strlen(failed_type_name); | |
| 477 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
| 478 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
| 479 resolved, failed_type_name); | |
| 480 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
| 481 } | |
| 482 } | |
| 483 } | |
| 484 } | |
| 485 | |
| 486 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, | |
| 487 KlassHandle resolved_klass, | |
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488 Symbol* method_name, |
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489 Symbol* method_signature, |
| 0 | 490 KlassHandle current_klass, |
| 491 bool check_access, TRAPS) { | |
| 492 | |
| 493 // check if klass is interface | |
| 494 if (!resolved_klass->is_interface()) { | |
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495 ResourceMark rm(THREAD); |
| 0 | 496 char buf[200]; |
| 6983 | 497 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name()); |
| 0 | 498 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); |
| 499 } | |
| 500 | |
| 501 // lookup method in this interface or its super, java.lang.Object | |
| 502 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
| 503 | |
| 504 if (resolved_method.is_null()) { | |
| 505 // lookup method in all the super-interfaces | |
| 506 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
| 507 if (resolved_method.is_null()) { | |
| 508 // no method found | |
| 509 ResourceMark rm(THREAD); | |
| 510 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), | |
| 6983 | 511 Method::name_and_sig_as_C_string(resolved_klass(), |
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512 method_name, |
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513 method_signature)); |
| 0 | 514 } |
| 515 } | |
| 516 | |
| 517 if (check_access) { | |
| 518 HandleMark hm(THREAD); | |
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519 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); |
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520 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); |
| 0 | 521 { |
| 522 ResourceMark rm(THREAD); | |
| 523 char* failed_type_name = | |
| 524 SystemDictionary::check_signature_loaders(method_signature, loader, | |
| 525 class_loader, true, CHECK); | |
| 526 if (failed_type_name != NULL) { | |
| 527 const char* msg = "loader constraint violation: when resolving " | |
| 528 "interface method \"%s\" the class loader (instance of %s) of the " | |
| 529 "current class, %s, and the class loader (instance of %s) for " | |
| 530 "resolved class, %s, have different Class objects for the type %s " | |
| 531 "used in the signature"; | |
| 6983 | 532 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); |
| 0 | 533 const char* loader1 = SystemDictionary::loader_name(loader()); |
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534 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); |
| 0 | 535 const char* loader2 = SystemDictionary::loader_name(class_loader()); |
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536 char* resolved = InstanceKlass::cast(resolved_klass())->name()->as_C_string(); |
| 0 | 537 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
| 538 strlen(current) + strlen(loader2) + strlen(resolved) + | |
| 539 strlen(failed_type_name); | |
| 540 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
| 541 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
| 542 resolved, failed_type_name); | |
| 543 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
| 544 } | |
| 545 } | |
| 546 } | |
| 547 } | |
| 548 | |
| 549 //------------------------------------------------------------------------------------------------------------------------ | |
| 550 // Field resolution | |
| 551 | |
| 552 void LinkResolver::check_field_accessability(KlassHandle ref_klass, | |
| 553 KlassHandle resolved_klass, | |
| 554 KlassHandle sel_klass, | |
| 555 fieldDescriptor& fd, | |
| 556 TRAPS) { | |
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557 if (!Reflection::verify_field_access(ref_klass(), |
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558 resolved_klass(), |
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559 sel_klass(), |
| 0 | 560 fd.access_flags(), |
| 561 true)) { | |
| 562 ResourceMark rm(THREAD); | |
| 563 Exceptions::fthrow( | |
| 564 THREAD_AND_LOCATION, | |
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565 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 566 "tried to access field %s.%s from class %s", |
| 567 sel_klass->external_name(), | |
| 568 fd.name()->as_C_string(), | |
| 569 ref_klass->external_name() | |
| 570 ); | |
| 571 return; | |
| 572 } | |
| 573 } | |
| 574 | |
| 575 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) { | |
| 576 resolve_field(result, pool, index, byte, check_only, true, CHECK); | |
| 577 } | |
| 578 | |
| 579 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) { | |
| 580 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || | |
| 581 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode"); | |
| 582 | |
| 583 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); | |
| 584 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); | |
| 585 | |
| 586 // resolve specified klass | |
| 587 KlassHandle resolved_klass; | |
| 588 if (update_pool) { | |
| 589 resolve_klass(resolved_klass, pool, index, CHECK); | |
| 590 } else { | |
| 591 resolve_klass_no_update(resolved_klass, pool, index, CHECK); | |
| 592 } | |
| 593 // Load these early in case the resolve of the containing klass fails | |
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594 Symbol* field = pool->name_ref_at(index); |
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595 Symbol* sig = pool->signature_ref_at(index); |
| 0 | 596 // Check if there's a resolved klass containing the field |
| 597 if( resolved_klass.is_null() ) { | |
| 598 ResourceMark rm(THREAD); | |
| 599 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
| 600 } | |
| 601 | |
| 602 // Resolve instance field | |
| 603 fieldDescriptor fd; // find_field initializes fd if found | |
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604 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); |
| 0 | 605 // check if field exists; i.e., if a klass containing the field def has been selected |
| 606 if (sel_klass.is_null()){ | |
| 607 ResourceMark rm(THREAD); | |
| 608 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
| 609 } | |
| 610 | |
| 611 // check access | |
| 612 KlassHandle ref_klass(THREAD, pool->pool_holder()); | |
| 613 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK); | |
| 614 | |
| 615 // check for errors | |
| 616 if (is_static != fd.is_static()) { | |
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617 ResourceMark rm(THREAD); |
| 0 | 618 char msg[200]; |
| 6983 | 619 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string()); |
| 0 | 620 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); |
| 621 } | |
| 622 | |
| 623 // Final fields can only be accessed from its own class. | |
| 624 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) { | |
| 625 THROW(vmSymbols::java_lang_IllegalAccessError()); | |
| 626 } | |
| 627 | |
| 628 // initialize resolved_klass if necessary | |
| 629 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) | |
| 630 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) | |
| 631 // | |
| 632 // note 2: we don't want to force initialization if we are just checking | |
| 633 // if the field access is legal; e.g., during compilation | |
| 634 if (is_static && !check_only) { | |
| 635 sel_klass->initialize(CHECK); | |
| 636 } | |
| 637 | |
| 638 { | |
| 639 HandleMark hm(THREAD); | |
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640 Handle ref_loader (THREAD, InstanceKlass::cast(ref_klass())->class_loader()); |
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641 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader()); |
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642 Symbol* signature_ref = pool->signature_ref_at(index); |
| 0 | 643 { |
| 644 ResourceMark rm(THREAD); | |
| 645 char* failed_type_name = | |
| 646 SystemDictionary::check_signature_loaders(signature_ref, | |
| 647 ref_loader, sel_loader, | |
| 648 false, | |
| 649 CHECK); | |
| 650 if (failed_type_name != NULL) { | |
| 651 const char* msg = "loader constraint violation: when resolving field" | |
| 652 " \"%s\" the class loader (instance of %s) of the referring class, " | |
| 653 "%s, and the class loader (instance of %s) for the field's resolved " | |
| 654 "type, %s, have different Class objects for that type"; | |
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655 char* field_name = field->as_C_string(); |
| 0 | 656 const char* loader1 = SystemDictionary::loader_name(ref_loader()); |
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657 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string(); |
| 0 | 658 const char* loader2 = SystemDictionary::loader_name(sel_loader()); |
| 659 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + | |
| 660 strlen(sel) + strlen(loader2) + strlen(failed_type_name); | |
| 661 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
| 662 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, | |
| 663 failed_type_name); | |
| 664 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
| 665 } | |
| 666 } | |
| 667 } | |
| 668 | |
| 669 // return information. note that the klass is set to the actual klass containing the | |
| 670 // field, otherwise access of static fields in superclasses will not work. | |
| 671 KlassHandle holder (THREAD, fd.field_holder()); | |
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672 Symbol* name = fd.name(); |
| 0 | 673 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags()); |
| 674 } | |
| 675 | |
| 676 | |
| 677 //------------------------------------------------------------------------------------------------------------------------ | |
| 678 // Invoke resolution | |
| 679 // | |
| 680 // Naming conventions: | |
| 681 // | |
| 682 // resolved_method the specified method (i.e., static receiver specified via constant pool index) | |
| 683 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) | |
| 684 // resolved_klass the specified klass (i.e., specified via constant pool index) | |
| 685 // recv_klass the receiver klass | |
| 686 | |
| 687 | |
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688 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, |
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689 Symbol* method_signature, KlassHandle current_klass, |
| 0 | 690 bool check_access, bool initialize_class, TRAPS) { |
| 691 methodHandle resolved_method; | |
| 692 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 6983 | 693 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder()); |
| 0 | 694 |
| 695 // Initialize klass (this should only happen if everything is ok) | |
| 696 if (initialize_class && resolved_klass->should_be_initialized()) { | |
| 697 resolved_klass->initialize(CHECK); | |
| 698 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 699 } | |
| 700 | |
| 701 // setup result | |
| 702 result.set_static(resolved_klass, resolved_method, CHECK); | |
| 703 } | |
| 704 | |
| 705 // throws linktime exceptions | |
| 706 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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707 Symbol* method_name, Symbol* method_signature, |
| 0 | 708 KlassHandle current_klass, bool check_access, TRAPS) { |
| 709 | |
| 710 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 711 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); | |
| 712 | |
| 713 // check if static | |
| 714 if (!resolved_method->is_static()) { | |
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715 ResourceMark rm(THREAD); |
| 0 | 716 char buf[200]; |
| 6983 | 717 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(), |
| 0 | 718 resolved_method->name(), |
| 719 resolved_method->signature())); | |
| 720 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 721 } | |
| 722 } | |
| 723 | |
| 724 | |
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725 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, |
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726 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
| 0 | 727 methodHandle resolved_method; |
| 728 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 729 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); | |
| 730 } | |
| 731 | |
| 732 // throws linktime exceptions | |
| 733 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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734 Symbol* method_name, Symbol* method_signature, |
| 0 | 735 KlassHandle current_klass, bool check_access, TRAPS) { |
| 736 | |
| 6934 | 737 if (resolved_klass->is_interface() && current_klass() != NULL) { |
| 738 // If the target class is a direct interface, treat this as a "super" | |
| 739 // default call. | |
| 740 // | |
| 741 // If the current method is an overpass that happens to call a direct | |
| 742 // super-interface's method, then we'll end up rerunning the default method | |
| 743 // analysis even though we don't need to, but that's ok since it will end | |
| 744 // up with the same answer. | |
| 745 InstanceKlass* ik = InstanceKlass::cast(current_klass()); | |
| 746 Array<Klass*>* interfaces = ik->local_interfaces(); | |
| 747 int num_interfaces = interfaces->length(); | |
| 748 for (int index = 0; index < num_interfaces; index++) { | |
| 749 if (interfaces->at(index) == resolved_klass()) { | |
| 750 Method* method = DefaultMethods::find_super_default(current_klass(), | |
| 751 resolved_klass(), method_name, method_signature, CHECK); | |
| 752 resolved_method = methodHandle(THREAD, method); | |
| 753 return; | |
| 754 } | |
| 755 } | |
| 756 } | |
| 757 | |
| 0 | 758 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); |
| 759 | |
| 760 // check if method name is <init>, that it is found in same klass as static type | |
| 761 if (resolved_method->name() == vmSymbols::object_initializer_name() && | |
| 762 resolved_method->method_holder() != resolved_klass()) { | |
| 763 ResourceMark rm(THREAD); | |
| 764 Exceptions::fthrow( | |
| 765 THREAD_AND_LOCATION, | |
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766 vmSymbols::java_lang_NoSuchMethodError(), |
| 0 | 767 "%s: method %s%s not found", |
| 768 resolved_klass->external_name(), | |
| 769 resolved_method->name()->as_C_string(), | |
| 770 resolved_method->signature()->as_C_string() | |
| 771 ); | |
| 772 return; | |
| 773 } | |
| 774 | |
| 775 // check if not static | |
| 776 if (resolved_method->is_static()) { | |
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777 ResourceMark rm(THREAD); |
| 0 | 778 char buf[200]; |
| 779 jio_snprintf(buf, sizeof(buf), | |
| 780 "Expecting non-static method %s", | |
| 6983 | 781 Method::name_and_sig_as_C_string(resolved_klass(), |
| 0 | 782 resolved_method->name(), |
| 783 resolved_method->signature())); | |
| 784 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 785 } | |
| 786 } | |
| 787 | |
| 788 // throws runtime exceptions | |
| 789 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
| 790 KlassHandle current_klass, bool check_access, TRAPS) { | |
| 791 | |
| 792 // resolved method is selected method unless we have an old-style lookup | |
| 793 methodHandle sel_method(THREAD, resolved_method()); | |
| 794 | |
| 795 // check if this is an old-style super call and do a new lookup if so | |
| 796 { KlassHandle method_klass = KlassHandle(THREAD, | |
| 797 resolved_method->method_holder()); | |
| 798 | |
| 6934 | 799 const bool direct_calling_default_method = |
| 800 resolved_klass() != NULL && resolved_method() != NULL && | |
| 801 resolved_klass->is_interface() && !resolved_method->is_abstract(); | |
| 802 | |
| 803 if (!direct_calling_default_method && | |
| 804 check_access && | |
| 0 | 805 // a) check if ACC_SUPER flag is set for the current class |
| 806 current_klass->is_super() && | |
| 807 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!) | |
| 6934 | 808 current_klass->is_subtype_of(method_klass()) && |
| 809 current_klass() != method_klass() && | |
| 0 | 810 // c) check if the method is not <init> |
| 811 resolved_method->name() != vmSymbols::object_initializer_name()) { | |
| 812 // Lookup super method | |
| 813 KlassHandle super_klass(THREAD, current_klass->super()); | |
| 814 lookup_instance_method_in_klasses(sel_method, super_klass, | |
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815 resolved_method->name(), |
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816 resolved_method->signature(), CHECK); |
| 0 | 817 // check if found |
| 818 if (sel_method.is_null()) { | |
| 819 ResourceMark rm(THREAD); | |
| 820 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
| 6983 | 821 Method::name_and_sig_as_C_string(resolved_klass(), |
| 0 | 822 resolved_method->name(), |
| 823 resolved_method->signature())); | |
| 824 } | |
| 825 } | |
| 826 } | |
| 827 | |
| 828 // check if not static | |
| 829 if (sel_method->is_static()) { | |
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830 ResourceMark rm(THREAD); |
| 0 | 831 char buf[200]; |
| 6983 | 832 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), |
| 0 | 833 resolved_method->name(), |
| 834 resolved_method->signature())); | |
| 835 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 836 } | |
| 837 | |
| 838 // check if abstract | |
| 839 if (sel_method->is_abstract()) { | |
| 840 ResourceMark rm(THREAD); | |
| 841 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
| 6983 | 842 Method::name_and_sig_as_C_string(resolved_klass(), |
| 0 | 843 sel_method->name(), |
| 844 sel_method->signature())); | |
| 845 } | |
| 846 | |
| 847 // setup result | |
| 848 result.set_static(resolved_klass, sel_method, CHECK); | |
| 849 } | |
| 850 | |
| 851 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, | |
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852 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
| 0 | 853 bool check_access, bool check_null_and_abstract, TRAPS) { |
| 854 methodHandle resolved_method; | |
| 855 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 856 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); | |
| 857 } | |
| 858 | |
| 859 // throws linktime exceptions | |
| 860 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, | |
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861 Symbol* method_name, Symbol* method_signature, |
| 0 | 862 KlassHandle current_klass, bool check_access, TRAPS) { |
| 863 // normal method resolution | |
| 864 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 865 | |
| 866 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
| 867 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
| 868 | |
| 869 // check if not static | |
| 870 if (resolved_method->is_static()) { | |
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871 ResourceMark rm(THREAD); |
| 0 | 872 char buf[200]; |
| 6983 | 873 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), |
| 0 | 874 resolved_method->name(), |
| 875 resolved_method->signature())); | |
| 876 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
| 877 } | |
| 878 } | |
| 879 | |
| 880 // throws runtime exceptions | |
| 881 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, | |
| 882 methodHandle resolved_method, | |
| 883 KlassHandle resolved_klass, | |
| 884 Handle recv, | |
| 885 KlassHandle recv_klass, | |
| 886 bool check_null_and_abstract, | |
| 887 TRAPS) { | |
| 888 | |
| 889 // setup default return values | |
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890 int vtable_index = Method::invalid_vtable_index; |
| 0 | 891 methodHandle selected_method; |
| 892 | |
| 893 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); | |
| 894 | |
| 895 // runtime method resolution | |
| 896 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists | |
| 897 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 898 } | |
| 899 | |
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900 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s |
| 0 | 901 // has not been rewritten, and the vtable initialized. |
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902 assert(resolved_method->method_holder()->is_linked(), "must be linked"); |
| 0 | 903 |
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904 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s |
| 0 | 905 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since |
| 906 // a missing receiver might result in a bogus lookup. | |
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907 assert(resolved_method->method_holder()->is_linked(), "must be linked"); |
| 0 | 908 |
| 909 // do lookup based on receiver klass using the vtable index | |
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910 if (resolved_method->method_holder()->is_interface()) { // miranda method |
| 0 | 911 vtable_index = vtable_index_of_miranda_method(resolved_klass, |
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912 resolved_method->name(), |
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913 resolved_method->signature(), CHECK); |
| 0 | 914 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); |
| 915 | |
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916 InstanceKlass* inst = InstanceKlass::cast(recv_klass()); |
| 0 | 917 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); |
| 918 } else { | |
| 919 // at this point we are sure that resolved_method is virtual and not | |
| 920 // a miranda method; therefore, it must have a valid vtable index. | |
| 921 vtable_index = resolved_method->vtable_index(); | |
| 922 // We could get a negative vtable_index for final methods, | |
| 923 // because as an optimization they are they are never put in the vtable, | |
| 924 // unless they override an existing method. | |
| 925 // If we do get a negative, it means the resolved method is the the selected | |
| 926 // method, and it can never be changed by an override. | |
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927 if (vtable_index == Method::nonvirtual_vtable_index) { |
| 0 | 928 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); |
| 929 selected_method = resolved_method; | |
| 930 } else { | |
| 931 // recv_klass might be an arrayKlassOop but all vtables start at | |
| 932 // the same place. The cast is to avoid virtual call and assertion. | |
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933 InstanceKlass* inst = (InstanceKlass*)recv_klass(); |
| 0 | 934 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); |
| 935 } | |
| 936 } | |
| 937 | |
| 938 // check if method exists | |
| 939 if (selected_method.is_null()) { | |
| 940 ResourceMark rm(THREAD); | |
| 941 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
| 6983 | 942 Method::name_and_sig_as_C_string(resolved_klass(), |
| 0 | 943 resolved_method->name(), |
| 944 resolved_method->signature())); | |
| 945 } | |
| 946 | |
| 947 // check if abstract | |
| 948 if (check_null_and_abstract && selected_method->is_abstract()) { | |
| 949 ResourceMark rm(THREAD); | |
| 950 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
| 6983 | 951 Method::name_and_sig_as_C_string(resolved_klass(), |
| 0 | 952 selected_method->name(), |
| 953 selected_method->signature())); | |
| 954 } | |
| 955 | |
| 956 // setup result | |
| 957 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); | |
| 958 } | |
| 959 | |
| 960 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, | |
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961 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
| 0 | 962 bool check_access, bool check_null_and_abstract, TRAPS) { |
| 963 methodHandle resolved_method; | |
| 964 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 965 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); | |
| 966 } | |
| 967 | |
| 968 // throws linktime exceptions | |
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969 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, |
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970 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
| 0 | 971 // normal interface method resolution |
| 972 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
| 973 | |
| 974 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
| 975 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
| 976 } | |
| 977 | |
| 978 // throws runtime exceptions | |
| 979 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
| 980 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { | |
| 981 // check if receiver exists | |
| 982 if (check_null_and_abstract && recv.is_null()) { | |
| 983 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 984 } | |
| 985 | |
| 986 // check if receiver klass implements the resolved interface | |
| 987 if (!recv_klass->is_subtype_of(resolved_klass())) { | |
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988 ResourceMark rm(THREAD); |
| 0 | 989 char buf[200]; |
| 990 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", | |
| 6983 | 991 recv_klass()->external_name(), |
| 992 resolved_klass()->external_name()); | |
| 0 | 993 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); |
| 994 } | |
| 995 // do lookup based on receiver klass | |
| 996 methodHandle sel_method; | |
| 997 lookup_instance_method_in_klasses(sel_method, recv_klass, | |
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998 resolved_method->name(), |
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999 resolved_method->signature(), CHECK); |
| 0 | 1000 // check if method exists |
| 1001 if (sel_method.is_null()) { | |
| 1002 ResourceMark rm(THREAD); | |
| 1003 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
| 6983 | 1004 Method::name_and_sig_as_C_string(recv_klass(), |
| 0 | 1005 resolved_method->name(), |
| 1006 resolved_method->signature())); | |
| 1007 } | |
| 1008 // check if public | |
| 1009 if (!sel_method->is_public()) { | |
| 1010 ResourceMark rm(THREAD); | |
| 1011 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), | |
| 6983 | 1012 Method::name_and_sig_as_C_string(recv_klass(), |
| 0 | 1013 sel_method->name(), |
| 1014 sel_method->signature())); | |
| 1015 } | |
| 1016 // check if abstract | |
| 1017 if (check_null_and_abstract && sel_method->is_abstract()) { | |
| 1018 ResourceMark rm(THREAD); | |
| 1019 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
| 6983 | 1020 Method::name_and_sig_as_C_string(recv_klass(), |
| 0 | 1021 sel_method->name(), |
| 1022 sel_method->signature())); | |
| 1023 } | |
| 1024 // setup result | |
| 1025 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK); | |
| 1026 } | |
| 1027 | |
| 1028 | |
| 1029 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( | |
| 1030 KlassHandle resolved_klass, | |
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1031 Symbol* method_name, |
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1032 Symbol* method_signature, |
| 0 | 1033 KlassHandle current_klass, |
| 1034 bool check_access) { | |
| 1035 EXCEPTION_MARK; | |
| 1036 methodHandle method_result; | |
| 1037 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
| 1038 if (HAS_PENDING_EXCEPTION) { | |
| 1039 CLEAR_PENDING_EXCEPTION; | |
| 1040 return methodHandle(); | |
| 1041 } else { | |
| 1042 return method_result; | |
| 1043 } | |
| 1044 } | |
| 1045 | |
| 1046 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( | |
| 1047 KlassHandle resolved_klass, | |
|
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1048 Symbol* method_name, |
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1049 Symbol* method_signature, |
| 0 | 1050 KlassHandle current_klass, |
| 1051 bool check_access) { | |
| 1052 EXCEPTION_MARK; | |
| 1053 methodHandle method_result; | |
| 1054 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
| 1055 if (HAS_PENDING_EXCEPTION) { | |
| 1056 CLEAR_PENDING_EXCEPTION; | |
| 1057 return methodHandle(); | |
| 1058 } else { | |
| 1059 return method_result; | |
| 1060 } | |
| 1061 } | |
| 1062 | |
| 1063 methodHandle LinkResolver::resolve_virtual_call_or_null( | |
| 1064 KlassHandle receiver_klass, | |
| 1065 KlassHandle resolved_klass, | |
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1066 Symbol* name, |
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1067 Symbol* signature, |
| 0 | 1068 KlassHandle current_klass) { |
| 1069 EXCEPTION_MARK; | |
| 1070 CallInfo info; | |
| 1071 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1072 if (HAS_PENDING_EXCEPTION) { | |
| 1073 CLEAR_PENDING_EXCEPTION; | |
| 1074 return methodHandle(); | |
| 1075 } | |
| 1076 return info.selected_method(); | |
| 1077 } | |
| 1078 | |
| 1079 methodHandle LinkResolver::resolve_interface_call_or_null( | |
| 1080 KlassHandle receiver_klass, | |
| 1081 KlassHandle resolved_klass, | |
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1082 Symbol* name, |
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1083 Symbol* signature, |
| 0 | 1084 KlassHandle current_klass) { |
| 1085 EXCEPTION_MARK; | |
| 1086 CallInfo info; | |
| 1087 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1088 if (HAS_PENDING_EXCEPTION) { | |
| 1089 CLEAR_PENDING_EXCEPTION; | |
| 1090 return methodHandle(); | |
| 1091 } | |
| 1092 return info.selected_method(); | |
| 1093 } | |
| 1094 | |
| 1095 int LinkResolver::resolve_virtual_vtable_index( | |
| 1096 KlassHandle receiver_klass, | |
| 1097 KlassHandle resolved_klass, | |
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1098 Symbol* name, |
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1099 Symbol* signature, |
| 0 | 1100 KlassHandle current_klass) { |
| 1101 EXCEPTION_MARK; | |
| 1102 CallInfo info; | |
| 1103 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1104 if (HAS_PENDING_EXCEPTION) { | |
| 1105 CLEAR_PENDING_EXCEPTION; | |
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1106 return Method::invalid_vtable_index; |
| 0 | 1107 } |
| 1108 return info.vtable_index(); | |
| 1109 } | |
| 1110 | |
| 1111 methodHandle LinkResolver::resolve_static_call_or_null( | |
| 1112 KlassHandle resolved_klass, | |
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1113 Symbol* name, |
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1114 Symbol* signature, |
| 0 | 1115 KlassHandle current_klass) { |
| 1116 EXCEPTION_MARK; | |
| 1117 CallInfo info; | |
| 1118 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
| 1119 if (HAS_PENDING_EXCEPTION) { | |
| 1120 CLEAR_PENDING_EXCEPTION; | |
| 1121 return methodHandle(); | |
| 1122 } | |
| 1123 return info.selected_method(); | |
| 1124 } | |
| 1125 | |
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1126 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, |
| 0 | 1127 KlassHandle current_klass) { |
| 1128 EXCEPTION_MARK; | |
| 1129 CallInfo info; | |
| 1130 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); | |
| 1131 if (HAS_PENDING_EXCEPTION) { | |
| 1132 CLEAR_PENDING_EXCEPTION; | |
| 1133 return methodHandle(); | |
| 1134 } | |
| 1135 return info.selected_method(); | |
| 1136 } | |
| 1137 | |
| 1138 | |
| 1139 | |
| 1140 //------------------------------------------------------------------------------------------------------------------------ | |
| 1141 // ConstantPool entries | |
| 1142 | |
| 1143 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { | |
| 1144 switch (byte) { | |
| 1145 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; | |
| 1146 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; | |
| 1147 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; | |
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1148 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break; |
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1149 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; |
| 0 | 1150 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; |
| 1151 } | |
| 1152 return; | |
| 1153 } | |
| 1154 | |
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1155 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, |
| 0 | 1156 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { |
| 1157 // resolve klass | |
| 1158 resolve_klass(resolved_klass, pool, index, CHECK); | |
| 1159 | |
| 1160 // Get name, signature, and static klass | |
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1161 method_name = pool->name_ref_at(index); |
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1162 method_signature = pool->signature_ref_at(index); |
| 0 | 1163 current_klass = KlassHandle(THREAD, pool->pool_holder()); |
| 1164 } | |
| 1165 | |
| 1166 | |
| 1167 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
| 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); | |
| 1173 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
| 1174 } | |
| 1175 | |
| 1176 | |
| 1177 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
| 1178 KlassHandle resolved_klass; | |
|
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1179 Symbol* method_name = NULL; |
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1180 Symbol* method_signature = NULL; |
| 0 | 1181 KlassHandle current_klass; |
| 1182 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
| 1183 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
| 1184 } | |
| 1185 | |
| 1186 | |
| 1187 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, | |
| 1188 constantPoolHandle pool, int index, | |
| 1189 TRAPS) { | |
| 1190 | |
| 1191 KlassHandle resolved_klass; | |
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1192 Symbol* method_name = NULL; |
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1193 Symbol* method_signature = NULL; |
| 0 | 1194 KlassHandle current_klass; |
| 1195 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
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1196 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); |
| 0 | 1197 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); |
| 1198 } | |
| 1199 | |
| 1200 | |
| 1201 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { | |
| 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_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); |
| 1209 } | |
| 1210 | |
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1211 |
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1212 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { |
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1213 assert(EnableInvokeDynamic, ""); |
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1214 // This guy is reached from InterpreterRuntime::resolve_invokehandle. |
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1215 KlassHandle resolved_klass; |
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1216 Symbol* method_name = NULL; |
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1217 Symbol* method_signature = NULL; |
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1218 KlassHandle current_klass; |
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1219 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); |
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1220 if (TraceMethodHandles) |
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1221 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string()); |
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1222 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK); |
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1223 } |
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1224 |
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1225 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass, |
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1226 Symbol* method_name, Symbol* method_signature, |
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1227 KlassHandle current_klass, |
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1228 TRAPS) { |
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1229 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar |
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1230 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), ""); |
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1231 assert(MethodHandles::is_signature_polymorphic_name(method_name), ""); |
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1232 methodHandle resolved_method; |
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1233 Handle resolved_appendix; |
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1234 Handle resolved_method_type; |
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1235 lookup_polymorphic_method(resolved_method, resolved_klass, |
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1236 method_name, method_signature, |
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1237 current_klass, &resolved_appendix, &resolved_method_type, CHECK); |
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1238 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); |
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1239 } |
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1240 |
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1241 |
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1242 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { |
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1243 assert(EnableInvokeDynamic, ""); |
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1244 pool->set_invokedynamic(); // mark header to flag active call sites |
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1245 |
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1246 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK); |
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1247 Symbol* method_name = pool->name_ref_at(index); |
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1248 Symbol* method_signature = pool->signature_ref_at(index); |
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1249 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder()); |
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1250 |
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1251 // Resolve the bootstrap specifier (BSM + optional arguments). |
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1252 Handle bootstrap_specifier; |
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1253 // Check if CallSite has been bound already: |
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1254 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index); |
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1255 if (cpce->is_f1_null()) { |
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1256 int pool_index = cpce->constant_pool_index(); |
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1257 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK); |
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1258 assert(bsm_info != NULL, ""); |
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1259 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic. |
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1260 bootstrap_specifier = Handle(THREAD, bsm_info); |
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1261 } |
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1262 if (!cpce->is_f1_null()) { |
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1263 methodHandle method( THREAD, cpce->f1_as_method()); |
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1264 Handle appendix( THREAD, cpce->appendix_if_resolved(pool)); |
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1265 Handle method_type(THREAD, cpce->method_type_if_resolved(pool)); |
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1266 result.set_handle(method, appendix, method_type, CHECK); |
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1267 return; |
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1268 } |
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1269 |
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1270 if (TraceMethodHandles) { |
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1271 tty->print_cr("resolve_invokedynamic #%d %s %s", |
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1272 ConstantPool::decode_invokedynamic_index(index), |
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1273 method_name->as_C_string(), method_signature->as_C_string()); |
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1274 tty->print(" BSM info: "); bootstrap_specifier->print(); |
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1275 } |
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1276 |
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1277 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK); |
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1278 } |
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1279 |
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1280 void LinkResolver::resolve_dynamic_call(CallInfo& result, |
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1281 Handle bootstrap_specifier, |
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1282 Symbol* method_name, Symbol* method_signature, |
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1283 KlassHandle current_klass, |
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1284 TRAPS) { |
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1285 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...) |
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1286 // The appendix argument is likely to be a freshly-created CallSite. |
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1287 Handle resolved_appendix; |
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1288 Handle resolved_method_type; |
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1289 methodHandle resolved_method = |
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1290 SystemDictionary::find_dynamic_call_site_invoker(current_klass, |
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1291 bootstrap_specifier, |
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1292 method_name, method_signature, |
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1293 &resolved_appendix, |
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1294 &resolved_method_type, |
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1295 THREAD); |
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1296 if (HAS_PENDING_EXCEPTION) { |
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1297 if (TraceMethodHandles) { |
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1298 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION); |
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1299 PENDING_EXCEPTION->print(); |
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1300 } |
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1301 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) { |
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1302 // throw these guys, since they are already wrapped |
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1303 return; |
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1304 } |
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1305 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { |
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1306 // intercept only LinkageErrors which might have failed to wrap |
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1307 return; |
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1308 } |
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1309 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS. |
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1310 Handle nested_exception(THREAD, PENDING_EXCEPTION); |
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1311 CLEAR_PENDING_EXCEPTION; |
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1312 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception) |
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1313 } |
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1314 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); |
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1315 } |
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1316 |
| 0 | 1317 //------------------------------------------------------------------------------------------------------------------------ |
| 1318 #ifndef PRODUCT | |
| 1319 | |
| 1320 void FieldAccessInfo::print() { | |
| 1321 ResourceMark rm; | |
| 1322 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset()); | |
| 1323 } | |
| 1324 | |
| 1325 #endif |