Mercurial > hg > truffle
annotate src/share/vm/interpreter/linkResolver.cpp @ 8840:cd3089a56438
8009731: Confusing error message for loader constraint violation
Summary: Fix text, overwritten type and holder for resolved method
Reviewed-by: coleenp, dcubed, minqi, dholmes
author | acorn |
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date | Wed, 27 Mar 2013 14:10:59 -0400 |
parents | 11d5942ef9c7 |
children | d79859ff6535 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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); | |
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461 Symbol* failed_type_symbol = |
0 | 462 SystemDictionary::check_signature_loaders(method_signature, loader, |
463 class_loader, true, CHECK); | |
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464 if (failed_type_symbol != NULL) { |
0 | 465 const char* msg = "loader constraint violation: when resolving method" |
466 " \"%s\" the class loader (instance of %s) of the current class, %s," | |
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467 " and the class loader (instance of %s) for the method's defining class, %s, have" |
0 | 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* target = InstanceKlass::cast(resolved_method->method_holder()) |
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474 ->name()->as_C_string(); |
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475 char* failed_type_name = failed_type_symbol->as_C_string(); |
0 | 476 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
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477 strlen(current) + strlen(loader2) + strlen(target) + |
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478 strlen(failed_type_name) + 1; |
0 | 479 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); |
480 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
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481 target, failed_type_name); |
0 | 482 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); |
483 } | |
484 } | |
485 } | |
486 } | |
487 | |
488 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, | |
489 KlassHandle resolved_klass, | |
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490 Symbol* method_name, |
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491 Symbol* method_signature, |
0 | 492 KlassHandle current_klass, |
493 bool check_access, TRAPS) { | |
494 | |
495 // check if klass is interface | |
496 if (!resolved_klass->is_interface()) { | |
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497 ResourceMark rm(THREAD); |
0 | 498 char buf[200]; |
6983 | 499 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name()); |
0 | 500 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); |
501 } | |
502 | |
503 // lookup method in this interface or its super, java.lang.Object | |
504 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
505 | |
506 if (resolved_method.is_null()) { | |
507 // lookup method in all the super-interfaces | |
508 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
509 if (resolved_method.is_null()) { | |
510 // no method found | |
511 ResourceMark rm(THREAD); | |
512 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), | |
6983 | 513 Method::name_and_sig_as_C_string(resolved_klass(), |
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514 method_name, |
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515 method_signature)); |
0 | 516 } |
517 } | |
518 | |
519 if (check_access) { | |
520 HandleMark hm(THREAD); | |
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521 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); |
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522 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); |
0 | 523 { |
524 ResourceMark rm(THREAD); | |
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525 Symbol* failed_type_symbol = |
0 | 526 SystemDictionary::check_signature_loaders(method_signature, loader, |
527 class_loader, true, CHECK); | |
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528 if (failed_type_symbol != NULL) { |
0 | 529 const char* msg = "loader constraint violation: when resolving " |
530 "interface method \"%s\" the class loader (instance of %s) of the " | |
531 "current class, %s, and the class loader (instance of %s) for " | |
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532 "the method's defining class, %s, have different Class objects for the type %s " |
0 | 533 "used in the signature"; |
6983 | 534 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); |
0 | 535 const char* loader1 = SystemDictionary::loader_name(loader()); |
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536 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); |
0 | 537 const char* loader2 = SystemDictionary::loader_name(class_loader()); |
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538 char* target = InstanceKlass::cast(resolved_method->method_holder()) |
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539 ->name()->as_C_string(); |
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540 char* failed_type_name = failed_type_symbol->as_C_string(); |
0 | 541 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
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542 strlen(current) + strlen(loader2) + strlen(target) + |
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543 strlen(failed_type_name) + 1; |
0 | 544 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); |
545 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
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546 target, failed_type_name); |
0 | 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]; |
6983 | 623 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 | 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); | |
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649 Symbol* failed_type_symbol = |
0 | 650 SystemDictionary::check_signature_loaders(signature_ref, |
651 ref_loader, sel_loader, | |
652 false, | |
653 CHECK); | |
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654 if (failed_type_symbol != NULL) { |
0 | 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()); |
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663 char* failed_type_name = failed_type_symbol->as_C_string(); |
0 | 664 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + |
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665 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1; |
0 | 666 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); |
667 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, | |
668 failed_type_name); | |
669 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
670 } | |
671 } | |
672 } | |
673 | |
674 // return information. note that the klass is set to the actual klass containing the | |
675 // field, otherwise access of static fields in superclasses will not work. | |
676 KlassHandle holder (THREAD, fd.field_holder()); | |
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677 Symbol* name = fd.name(); |
0 | 678 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags()); |
679 } | |
680 | |
681 | |
682 //------------------------------------------------------------------------------------------------------------------------ | |
683 // Invoke resolution | |
684 // | |
685 // Naming conventions: | |
686 // | |
687 // resolved_method the specified method (i.e., static receiver specified via constant pool index) | |
688 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) | |
689 // resolved_klass the specified klass (i.e., specified via constant pool index) | |
690 // recv_klass the receiver klass | |
691 | |
692 | |
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693 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, |
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694 Symbol* method_signature, KlassHandle current_klass, |
0 | 695 bool check_access, bool initialize_class, TRAPS) { |
696 methodHandle resolved_method; | |
697 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
6983 | 698 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder()); |
0 | 699 |
700 // Initialize klass (this should only happen if everything is ok) | |
701 if (initialize_class && resolved_klass->should_be_initialized()) { | |
702 resolved_klass->initialize(CHECK); | |
703 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
704 } | |
705 | |
706 // setup result | |
707 result.set_static(resolved_klass, resolved_method, CHECK); | |
708 } | |
709 | |
710 // throws linktime exceptions | |
711 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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712 Symbol* method_name, Symbol* method_signature, |
0 | 713 KlassHandle current_klass, bool check_access, TRAPS) { |
714 | |
715 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
716 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); | |
717 | |
718 // check if static | |
719 if (!resolved_method->is_static()) { | |
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720 ResourceMark rm(THREAD); |
0 | 721 char buf[200]; |
6983 | 722 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(), |
0 | 723 resolved_method->name(), |
724 resolved_method->signature())); | |
725 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
726 } | |
727 } | |
728 | |
729 | |
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730 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, |
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731 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
0 | 732 methodHandle resolved_method; |
733 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
734 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); | |
735 } | |
736 | |
737 // throws linktime exceptions | |
738 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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739 Symbol* method_name, Symbol* method_signature, |
0 | 740 KlassHandle current_klass, bool check_access, TRAPS) { |
741 | |
6934 | 742 if (resolved_klass->is_interface() && current_klass() != NULL) { |
743 // If the target class is a direct interface, treat this as a "super" | |
744 // default call. | |
745 // | |
746 // If the current method is an overpass that happens to call a direct | |
747 // super-interface's method, then we'll end up rerunning the default method | |
748 // analysis even though we don't need to, but that's ok since it will end | |
749 // up with the same answer. | |
750 InstanceKlass* ik = InstanceKlass::cast(current_klass()); | |
751 Array<Klass*>* interfaces = ik->local_interfaces(); | |
752 int num_interfaces = interfaces->length(); | |
753 for (int index = 0; index < num_interfaces; index++) { | |
754 if (interfaces->at(index) == resolved_klass()) { | |
755 Method* method = DefaultMethods::find_super_default(current_klass(), | |
756 resolved_klass(), method_name, method_signature, CHECK); | |
757 resolved_method = methodHandle(THREAD, method); | |
758 return; | |
759 } | |
760 } | |
761 } | |
762 | |
0 | 763 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); |
764 | |
765 // check if method name is <init>, that it is found in same klass as static type | |
766 if (resolved_method->name() == vmSymbols::object_initializer_name() && | |
767 resolved_method->method_holder() != resolved_klass()) { | |
768 ResourceMark rm(THREAD); | |
769 Exceptions::fthrow( | |
770 THREAD_AND_LOCATION, | |
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771 vmSymbols::java_lang_NoSuchMethodError(), |
0 | 772 "%s: method %s%s not found", |
773 resolved_klass->external_name(), | |
774 resolved_method->name()->as_C_string(), | |
775 resolved_method->signature()->as_C_string() | |
776 ); | |
777 return; | |
778 } | |
779 | |
780 // check if not static | |
781 if (resolved_method->is_static()) { | |
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782 ResourceMark rm(THREAD); |
0 | 783 char buf[200]; |
784 jio_snprintf(buf, sizeof(buf), | |
785 "Expecting non-static method %s", | |
6983 | 786 Method::name_and_sig_as_C_string(resolved_klass(), |
0 | 787 resolved_method->name(), |
788 resolved_method->signature())); | |
789 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
790 } | |
791 } | |
792 | |
793 // throws runtime exceptions | |
794 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
795 KlassHandle current_klass, bool check_access, TRAPS) { | |
796 | |
797 // resolved method is selected method unless we have an old-style lookup | |
798 methodHandle sel_method(THREAD, resolved_method()); | |
799 | |
800 // check if this is an old-style super call and do a new lookup if so | |
801 { KlassHandle method_klass = KlassHandle(THREAD, | |
802 resolved_method->method_holder()); | |
803 | |
6934 | 804 const bool direct_calling_default_method = |
805 resolved_klass() != NULL && resolved_method() != NULL && | |
806 resolved_klass->is_interface() && !resolved_method->is_abstract(); | |
807 | |
808 if (!direct_calling_default_method && | |
809 check_access && | |
0 | 810 // a) check if ACC_SUPER flag is set for the current class |
8702 | 811 (current_klass->is_super() || !AllowNonVirtualCalls) && |
0 | 812 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!) |
6934 | 813 current_klass->is_subtype_of(method_klass()) && |
814 current_klass() != method_klass() && | |
0 | 815 // c) check if the method is not <init> |
816 resolved_method->name() != vmSymbols::object_initializer_name()) { | |
817 // Lookup super method | |
818 KlassHandle super_klass(THREAD, current_klass->super()); | |
819 lookup_instance_method_in_klasses(sel_method, super_klass, | |
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820 resolved_method->name(), |
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821 resolved_method->signature(), CHECK); |
0 | 822 // check if found |
823 if (sel_method.is_null()) { | |
824 ResourceMark rm(THREAD); | |
825 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
6983 | 826 Method::name_and_sig_as_C_string(resolved_klass(), |
0 | 827 resolved_method->name(), |
828 resolved_method->signature())); | |
829 } | |
830 } | |
831 } | |
832 | |
833 // check if not static | |
834 if (sel_method->is_static()) { | |
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835 ResourceMark rm(THREAD); |
0 | 836 char buf[200]; |
6983 | 837 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), |
0 | 838 resolved_method->name(), |
839 resolved_method->signature())); | |
840 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
841 } | |
842 | |
843 // check if abstract | |
844 if (sel_method->is_abstract()) { | |
845 ResourceMark rm(THREAD); | |
846 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
6983 | 847 Method::name_and_sig_as_C_string(resolved_klass(), |
0 | 848 sel_method->name(), |
849 sel_method->signature())); | |
850 } | |
851 | |
852 // setup result | |
853 result.set_static(resolved_klass, sel_method, CHECK); | |
854 } | |
855 | |
856 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, | |
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857 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
0 | 858 bool check_access, bool check_null_and_abstract, TRAPS) { |
859 methodHandle resolved_method; | |
860 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
861 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); | |
862 } | |
863 | |
864 // throws linktime exceptions | |
865 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, | |
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866 Symbol* method_name, Symbol* method_signature, |
0 | 867 KlassHandle current_klass, bool check_access, TRAPS) { |
868 // normal method resolution | |
869 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
870 | |
871 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
872 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
873 | |
874 // check if not static | |
875 if (resolved_method->is_static()) { | |
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876 ResourceMark rm(THREAD); |
0 | 877 char buf[200]; |
6983 | 878 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), |
0 | 879 resolved_method->name(), |
880 resolved_method->signature())); | |
881 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
882 } | |
883 } | |
884 | |
885 // throws runtime exceptions | |
886 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, | |
887 methodHandle resolved_method, | |
888 KlassHandle resolved_klass, | |
889 Handle recv, | |
890 KlassHandle recv_klass, | |
891 bool check_null_and_abstract, | |
892 TRAPS) { | |
893 | |
894 // setup default return values | |
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895 int vtable_index = Method::invalid_vtable_index; |
0 | 896 methodHandle selected_method; |
897 | |
898 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); | |
899 | |
900 // runtime method resolution | |
901 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists | |
902 THROW(vmSymbols::java_lang_NullPointerException()); | |
903 } | |
904 | |
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905 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s |
0 | 906 // has not been rewritten, and the vtable initialized. |
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907 assert(resolved_method->method_holder()->is_linked(), "must be linked"); |
0 | 908 |
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909 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s |
0 | 910 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since |
911 // a missing receiver might result in a bogus lookup. | |
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912 assert(resolved_method->method_holder()->is_linked(), "must be linked"); |
0 | 913 |
914 // do lookup based on receiver klass using the vtable index | |
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915 if (resolved_method->method_holder()->is_interface()) { // miranda method |
0 | 916 vtable_index = vtable_index_of_miranda_method(resolved_klass, |
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917 resolved_method->name(), |
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918 resolved_method->signature(), CHECK); |
0 | 919 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); |
920 | |
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921 InstanceKlass* inst = InstanceKlass::cast(recv_klass()); |
0 | 922 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); |
923 } else { | |
924 // at this point we are sure that resolved_method is virtual and not | |
925 // a miranda method; therefore, it must have a valid vtable index. | |
926 vtable_index = resolved_method->vtable_index(); | |
927 // We could get a negative vtable_index for final methods, | |
928 // because as an optimization they are they are never put in the vtable, | |
929 // unless they override an existing method. | |
930 // If we do get a negative, it means the resolved method is the the selected | |
931 // method, and it can never be changed by an override. | |
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932 if (vtable_index == Method::nonvirtual_vtable_index) { |
0 | 933 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); |
934 selected_method = resolved_method; | |
935 } else { | |
936 // recv_klass might be an arrayKlassOop but all vtables start at | |
937 // the same place. The cast is to avoid virtual call and assertion. | |
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938 InstanceKlass* inst = (InstanceKlass*)recv_klass(); |
0 | 939 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); |
940 } | |
941 } | |
942 | |
943 // check if method exists | |
944 if (selected_method.is_null()) { | |
945 ResourceMark rm(THREAD); | |
946 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
6983 | 947 Method::name_and_sig_as_C_string(resolved_klass(), |
0 | 948 resolved_method->name(), |
949 resolved_method->signature())); | |
950 } | |
951 | |
952 // check if abstract | |
953 if (check_null_and_abstract && selected_method->is_abstract()) { | |
954 ResourceMark rm(THREAD); | |
955 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
6983 | 956 Method::name_and_sig_as_C_string(resolved_klass(), |
0 | 957 selected_method->name(), |
958 selected_method->signature())); | |
959 } | |
960 | |
961 // setup result | |
962 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); | |
963 } | |
964 | |
965 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, | |
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966 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
0 | 967 bool check_access, bool check_null_and_abstract, TRAPS) { |
968 methodHandle resolved_method; | |
969 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
970 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); | |
971 } | |
972 | |
973 // throws linktime exceptions | |
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974 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, |
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975 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
0 | 976 // normal interface method resolution |
977 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
978 | |
979 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
980 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
981 } | |
982 | |
983 // throws runtime exceptions | |
984 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
985 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { | |
986 // check if receiver exists | |
987 if (check_null_and_abstract && recv.is_null()) { | |
988 THROW(vmSymbols::java_lang_NullPointerException()); | |
989 } | |
990 | |
991 // check if receiver klass implements the resolved interface | |
992 if (!recv_klass->is_subtype_of(resolved_klass())) { | |
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993 ResourceMark rm(THREAD); |
0 | 994 char buf[200]; |
995 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", | |
6983 | 996 recv_klass()->external_name(), |
997 resolved_klass()->external_name()); | |
0 | 998 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); |
999 } | |
1000 // do lookup based on receiver klass | |
1001 methodHandle sel_method; | |
1002 lookup_instance_method_in_klasses(sel_method, recv_klass, | |
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1003 resolved_method->name(), |
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1004 resolved_method->signature(), CHECK); |
0 | 1005 // check if method exists |
1006 if (sel_method.is_null()) { | |
1007 ResourceMark rm(THREAD); | |
1008 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
6983 | 1009 Method::name_and_sig_as_C_string(recv_klass(), |
0 | 1010 resolved_method->name(), |
1011 resolved_method->signature())); | |
1012 } | |
1013 // check if public | |
1014 if (!sel_method->is_public()) { | |
1015 ResourceMark rm(THREAD); | |
1016 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), | |
6983 | 1017 Method::name_and_sig_as_C_string(recv_klass(), |
0 | 1018 sel_method->name(), |
1019 sel_method->signature())); | |
1020 } | |
1021 // check if abstract | |
1022 if (check_null_and_abstract && sel_method->is_abstract()) { | |
1023 ResourceMark rm(THREAD); | |
1024 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
6983 | 1025 Method::name_and_sig_as_C_string(recv_klass(), |
0 | 1026 sel_method->name(), |
1027 sel_method->signature())); | |
1028 } | |
1029 // setup result | |
1030 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK); | |
1031 } | |
1032 | |
1033 | |
1034 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( | |
1035 KlassHandle resolved_klass, | |
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1036 Symbol* method_name, |
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1037 Symbol* method_signature, |
0 | 1038 KlassHandle current_klass, |
1039 bool check_access) { | |
1040 EXCEPTION_MARK; | |
1041 methodHandle method_result; | |
1042 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
1043 if (HAS_PENDING_EXCEPTION) { | |
1044 CLEAR_PENDING_EXCEPTION; | |
1045 return methodHandle(); | |
1046 } else { | |
1047 return method_result; | |
1048 } | |
1049 } | |
1050 | |
1051 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( | |
1052 KlassHandle resolved_klass, | |
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1053 Symbol* method_name, |
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1054 Symbol* method_signature, |
0 | 1055 KlassHandle current_klass, |
1056 bool check_access) { | |
1057 EXCEPTION_MARK; | |
1058 methodHandle method_result; | |
1059 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
1060 if (HAS_PENDING_EXCEPTION) { | |
1061 CLEAR_PENDING_EXCEPTION; | |
1062 return methodHandle(); | |
1063 } else { | |
1064 return method_result; | |
1065 } | |
1066 } | |
1067 | |
1068 methodHandle LinkResolver::resolve_virtual_call_or_null( | |
1069 KlassHandle receiver_klass, | |
1070 KlassHandle resolved_klass, | |
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1071 Symbol* name, |
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1072 Symbol* signature, |
0 | 1073 KlassHandle current_klass) { |
1074 EXCEPTION_MARK; | |
1075 CallInfo info; | |
1076 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
1077 if (HAS_PENDING_EXCEPTION) { | |
1078 CLEAR_PENDING_EXCEPTION; | |
1079 return methodHandle(); | |
1080 } | |
1081 return info.selected_method(); | |
1082 } | |
1083 | |
1084 methodHandle LinkResolver::resolve_interface_call_or_null( | |
1085 KlassHandle receiver_klass, | |
1086 KlassHandle resolved_klass, | |
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1087 Symbol* name, |
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1088 Symbol* signature, |
0 | 1089 KlassHandle current_klass) { |
1090 EXCEPTION_MARK; | |
1091 CallInfo info; | |
1092 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
1093 if (HAS_PENDING_EXCEPTION) { | |
1094 CLEAR_PENDING_EXCEPTION; | |
1095 return methodHandle(); | |
1096 } | |
1097 return info.selected_method(); | |
1098 } | |
1099 | |
1100 int LinkResolver::resolve_virtual_vtable_index( | |
1101 KlassHandle receiver_klass, | |
1102 KlassHandle resolved_klass, | |
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1103 Symbol* name, |
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1104 Symbol* signature, |
0 | 1105 KlassHandle current_klass) { |
1106 EXCEPTION_MARK; | |
1107 CallInfo info; | |
1108 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
1109 if (HAS_PENDING_EXCEPTION) { | |
1110 CLEAR_PENDING_EXCEPTION; | |
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1111 return Method::invalid_vtable_index; |
0 | 1112 } |
1113 return info.vtable_index(); | |
1114 } | |
1115 | |
1116 methodHandle LinkResolver::resolve_static_call_or_null( | |
1117 KlassHandle resolved_klass, | |
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1118 Symbol* name, |
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1119 Symbol* signature, |
0 | 1120 KlassHandle current_klass) { |
1121 EXCEPTION_MARK; | |
1122 CallInfo info; | |
1123 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
1124 if (HAS_PENDING_EXCEPTION) { | |
1125 CLEAR_PENDING_EXCEPTION; | |
1126 return methodHandle(); | |
1127 } | |
1128 return info.selected_method(); | |
1129 } | |
1130 | |
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1131 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, |
0 | 1132 KlassHandle current_klass) { |
1133 EXCEPTION_MARK; | |
1134 CallInfo info; | |
1135 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); | |
1136 if (HAS_PENDING_EXCEPTION) { | |
1137 CLEAR_PENDING_EXCEPTION; | |
1138 return methodHandle(); | |
1139 } | |
1140 return info.selected_method(); | |
1141 } | |
1142 | |
1143 | |
1144 | |
1145 //------------------------------------------------------------------------------------------------------------------------ | |
1146 // ConstantPool entries | |
1147 | |
1148 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { | |
1149 switch (byte) { | |
1150 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; | |
1151 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; | |
1152 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; | |
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1153 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break; |
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1154 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; |
0 | 1155 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; |
1156 } | |
1157 return; | |
1158 } | |
1159 | |
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1160 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, |
0 | 1161 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { |
1162 // resolve klass | |
1163 resolve_klass(resolved_klass, pool, index, CHECK); | |
1164 | |
1165 // Get name, signature, and static klass | |
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1166 method_name = pool->name_ref_at(index); |
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1167 method_signature = pool->signature_ref_at(index); |
0 | 1168 current_klass = KlassHandle(THREAD, pool->pool_holder()); |
1169 } | |
1170 | |
1171 | |
1172 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
1173 KlassHandle resolved_klass; | |
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1174 Symbol* method_name = NULL; |
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1175 Symbol* method_signature = NULL; |
0 | 1176 KlassHandle current_klass; |
1177 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1178 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
1179 } | |
1180 | |
1181 | |
1182 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
1183 KlassHandle resolved_klass; | |
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1184 Symbol* method_name = NULL; |
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1185 Symbol* method_signature = NULL; |
0 | 1186 KlassHandle current_klass; |
1187 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1188 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
1189 } | |
1190 | |
1191 | |
1192 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, | |
1193 constantPoolHandle pool, int index, | |
1194 TRAPS) { | |
1195 | |
1196 KlassHandle resolved_klass; | |
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1197 Symbol* method_name = NULL; |
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1198 Symbol* method_signature = NULL; |
0 | 1199 KlassHandle current_klass; |
1200 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
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1201 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); |
0 | 1202 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); |
1203 } | |
1204 | |
1205 | |
1206 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { | |
1207 KlassHandle resolved_klass; | |
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1208 Symbol* method_name = NULL; |
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1209 Symbol* method_signature = NULL; |
0 | 1210 KlassHandle current_klass; |
1211 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
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1212 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); |
0 | 1213 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); |
1214 } | |
1215 | |
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1216 |
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1217 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { |
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1218 assert(EnableInvokeDynamic, ""); |
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1219 // This guy is reached from InterpreterRuntime::resolve_invokehandle. |
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1220 KlassHandle resolved_klass; |
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1221 Symbol* method_name = NULL; |
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1222 Symbol* method_signature = NULL; |
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1223 KlassHandle current_klass; |
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1224 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); |
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1225 if (TraceMethodHandles) |
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1226 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string()); |
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1227 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK); |
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1228 } |
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1229 |
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1230 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass, |
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1231 Symbol* method_name, Symbol* method_signature, |
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1232 KlassHandle current_klass, |
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1233 TRAPS) { |
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1234 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar |
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1235 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), ""); |
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1236 assert(MethodHandles::is_signature_polymorphic_name(method_name), ""); |
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1237 methodHandle resolved_method; |
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1238 Handle resolved_appendix; |
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1239 Handle resolved_method_type; |
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1240 lookup_polymorphic_method(resolved_method, resolved_klass, |
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1241 method_name, method_signature, |
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1242 current_klass, &resolved_appendix, &resolved_method_type, CHECK); |
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1243 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); |
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1244 } |
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1245 |
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1246 |
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1247 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { |
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1248 assert(EnableInvokeDynamic, ""); |
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1249 |
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1250 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK); |
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1251 Symbol* method_name = pool->name_ref_at(index); |
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1252 Symbol* method_signature = pool->signature_ref_at(index); |
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1253 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder()); |
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1254 |
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1255 // Resolve the bootstrap specifier (BSM + optional arguments). |
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1256 Handle bootstrap_specifier; |
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1257 // Check if CallSite has been bound already: |
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1258 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index); |
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1259 if (cpce->is_f1_null()) { |
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1260 int pool_index = cpce->constant_pool_index(); |
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1261 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK); |
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1262 assert(bsm_info != NULL, ""); |
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1263 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic. |
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1264 bootstrap_specifier = Handle(THREAD, bsm_info); |
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1265 } |
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1266 if (!cpce->is_f1_null()) { |
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1267 methodHandle method( THREAD, cpce->f1_as_method()); |
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1268 Handle appendix( THREAD, cpce->appendix_if_resolved(pool)); |
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1269 Handle method_type(THREAD, cpce->method_type_if_resolved(pool)); |
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1270 result.set_handle(method, appendix, method_type, CHECK); |
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1271 return; |
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1272 } |
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1273 |
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1274 if (TraceMethodHandles) { |
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1275 tty->print_cr("resolve_invokedynamic #%d %s %s", |
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1276 ConstantPool::decode_invokedynamic_index(index), |
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1277 method_name->as_C_string(), method_signature->as_C_string()); |
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1278 tty->print(" BSM info: "); bootstrap_specifier->print(); |
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1279 } |
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1280 |
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1281 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK); |
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1282 } |
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1283 |
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1284 void LinkResolver::resolve_dynamic_call(CallInfo& result, |
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1285 Handle bootstrap_specifier, |
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1286 Symbol* method_name, Symbol* method_signature, |
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1287 KlassHandle current_klass, |
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1288 TRAPS) { |
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1289 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...) |
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1290 // The appendix argument is likely to be a freshly-created CallSite. |
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1291 Handle resolved_appendix; |
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1292 Handle resolved_method_type; |
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1293 methodHandle resolved_method = |
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1294 SystemDictionary::find_dynamic_call_site_invoker(current_klass, |
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1295 bootstrap_specifier, |
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1296 method_name, method_signature, |
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1297 &resolved_appendix, |
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1298 &resolved_method_type, |
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1299 THREAD); |
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1300 if (HAS_PENDING_EXCEPTION) { |
6266
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1301 if (TraceMethodHandles) { |
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1302 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION); |
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1303 PENDING_EXCEPTION->print(); |
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1304 } |
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1305 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) { |
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1306 // throw these guys, since they are already wrapped |
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1307 return; |
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1308 } |
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1309 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { |
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1310 // intercept only LinkageErrors which might have failed to wrap |
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1311 return; |
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1312 } |
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1313 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS. |
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1314 Handle nested_exception(THREAD, PENDING_EXCEPTION); |
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1315 CLEAR_PENDING_EXCEPTION; |
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1316 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception) |
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1317 } |
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1318 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); |
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1319 } |
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1320 |
0 | 1321 //------------------------------------------------------------------------------------------------------------------------ |
1322 #ifndef PRODUCT | |
1323 | |
1324 void FieldAccessInfo::print() { | |
1325 ResourceMark rm; | |
1326 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset()); | |
1327 } | |
1328 | |
1329 #endif |