Mercurial > hg > truffle
annotate src/share/vm/interpreter/linkResolver.cpp @ 2359:d2134498fd3f
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Reviewed-by: kvn, never
author | jrose |
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date | Thu, 17 Mar 2011 18:29:18 -0700 |
parents | 8033953d67ff |
children | 38fea01eb669 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "classfile/vmSymbols.hpp" | |
28 #include "compiler/compileBroker.hpp" | |
29 #include "gc_interface/collectedHeap.inline.hpp" | |
30 #include "interpreter/bytecode.hpp" | |
31 #include "interpreter/interpreterRuntime.hpp" | |
32 #include "interpreter/linkResolver.hpp" | |
33 #include "memory/resourceArea.hpp" | |
34 #include "memory/universe.inline.hpp" | |
35 #include "oops/instanceKlass.hpp" | |
36 #include "oops/objArrayOop.hpp" | |
37 #include "prims/methodHandles.hpp" | |
38 #include "prims/nativeLookup.hpp" | |
39 #include "runtime/compilationPolicy.hpp" | |
40 #include "runtime/fieldDescriptor.hpp" | |
41 #include "runtime/frame.inline.hpp" | |
42 #include "runtime/handles.inline.hpp" | |
43 #include "runtime/reflection.hpp" | |
44 #include "runtime/signature.hpp" | |
45 #include "runtime/vmThread.hpp" | |
46 #ifdef TARGET_OS_FAMILY_linux | |
47 # include "thread_linux.inline.hpp" | |
48 #endif | |
49 #ifdef TARGET_OS_FAMILY_solaris | |
50 # include "thread_solaris.inline.hpp" | |
51 #endif | |
52 #ifdef TARGET_OS_FAMILY_windows | |
53 # include "thread_windows.inline.hpp" | |
54 #endif | |
0 | 55 |
56 //------------------------------------------------------------------------------------------------------------------------ | |
57 // Implementation of FieldAccessInfo | |
58 | |
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59 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset, |
0 | 60 BasicType field_type, AccessFlags access_flags) { |
61 _klass = klass; | |
62 _name = name; | |
63 _field_index = field_index; | |
64 _field_offset = field_offset; | |
65 _field_type = field_type; | |
66 _access_flags = access_flags; | |
67 } | |
68 | |
69 | |
70 //------------------------------------------------------------------------------------------------------------------------ | |
71 // Implementation of CallInfo | |
72 | |
73 | |
74 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) { | |
75 int vtable_index = methodOopDesc::nonvirtual_vtable_index; | |
76 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); | |
77 } | |
78 | |
79 | |
80 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) { | |
81 // This is only called for interface methods. If the resolved_method | |
82 // comes from java/lang/Object, it can be the subject of a virtual call, so | |
83 // we should pick the vtable index from the resolved method. | |
84 // Other than that case, there is no valid vtable index to specify. | |
85 int vtable_index = methodOopDesc::invalid_vtable_index; | |
1142 | 86 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) { |
0 | 87 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check"); |
88 vtable_index = resolved_method->vtable_index(); | |
89 } | |
90 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); | |
91 } | |
92 | |
93 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { | |
94 assert(vtable_index >= 0 || vtable_index == methodOopDesc::nonvirtual_vtable_index, "valid index"); | |
95 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); | |
96 } | |
97 | |
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98 void CallInfo::set_dynamic(methodHandle resolved_method, TRAPS) { |
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99 assert(resolved_method->is_method_handle_invoke(), ""); |
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100 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); |
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101 assert(resolved_klass == resolved_method->method_holder(), ""); |
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102 int vtable_index = methodOopDesc::nonvirtual_vtable_index; |
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103 assert(resolved_method->vtable_index() == vtable_index, ""); |
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104 set_common(resolved_klass, KlassHandle(), resolved_method, resolved_method, vtable_index, CHECK); |
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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; | |
1783 | 114 if (CompilationPolicy::must_be_compiled(selected_method)) { |
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115 // This path is unusual, mostly used by the '-Xcomp' stress test mode. |
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116 |
1783 | 117 // Note: with several active threads, the must_be_compiled may be true |
118 // while can_be_compiled is false; remove assert | |
119 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile"); | |
0 | 120 if (THREAD->is_Compiler_thread()) { |
121 // don't force compilation, resolve was on behalf of compiler | |
122 return; | |
123 } | |
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124 if (instanceKlass::cast(selected_method->method_holder())->is_not_initialized()) { |
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125 // 'is_not_initialized' means not only '!is_initialized', but also that |
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126 // initialization has not been started yet ('!being_initialized') |
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127 // Do not force compilation of methods in uninitialized classes. |
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128 // Note that doing this would throw an assert later, |
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129 // in CompileBroker::compile_method. |
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130 // We sometimes use the link resolver to do reflective lookups |
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131 // even before classes are initialized. |
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132 return; |
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133 } |
0 | 134 CompileBroker::compile_method(selected_method, InvocationEntryBci, |
1783 | 135 CompLevel_initial_compile, |
136 methodHandle(), 0, "must_be_compiled", CHECK); | |
0 | 137 } |
138 } | |
139 | |
140 | |
141 //------------------------------------------------------------------------------------------------------------------------ | |
142 // Klass resolution | |
143 | |
144 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) { | |
145 if (!Reflection::verify_class_access(ref_klass->as_klassOop(), | |
146 sel_klass->as_klassOop(), | |
147 true)) { | |
148 ResourceMark rm(THREAD); | |
149 Exceptions::fthrow( | |
150 THREAD_AND_LOCATION, | |
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151 vmSymbols::java_lang_IllegalAccessError(), |
0 | 152 "tried to access class %s from class %s", |
153 sel_klass->external_name(), | |
154 ref_klass->external_name() | |
155 ); | |
156 return; | |
157 } | |
158 } | |
159 | |
160 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { | |
161 klassOop result_oop = pool->klass_ref_at(index, CHECK); | |
162 result = KlassHandle(THREAD, result_oop); | |
163 } | |
164 | |
165 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { | |
166 klassOop result_oop = | |
167 constantPoolOopDesc::klass_ref_at_if_loaded_check(pool, index, CHECK); | |
168 result = KlassHandle(THREAD, result_oop); | |
169 } | |
170 | |
171 | |
172 //------------------------------------------------------------------------------------------------------------------------ | |
173 // Method resolution | |
174 // | |
175 // According to JVM spec. $5.4.3c & $5.4.3d | |
176 | |
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177 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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178 methodOop result_oop = klass->uncached_lookup_method(name, signature); |
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179 if (EnableMethodHandles && result_oop != NULL) { |
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180 switch (result_oop->intrinsic_id()) { |
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181 case vmIntrinsics::_invokeExact: |
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182 case vmIntrinsics::_invokeGeneric: |
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183 case vmIntrinsics::_invokeDynamic: |
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184 // Do not link directly to these. The VM must produce a synthetic one using lookup_implicit_method. |
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185 return; |
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186 } |
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187 } |
0 | 188 result = methodHandle(THREAD, result_oop); |
189 } | |
190 | |
191 // returns first instance method | |
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192 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
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193 methodOop result_oop = klass->uncached_lookup_method(name, signature); |
0 | 194 result = methodHandle(THREAD, result_oop); |
195 while (!result.is_null() && result->is_static()) { | |
196 klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super()); | |
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197 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature)); |
0 | 198 } |
199 } | |
200 | |
201 | |
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202 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
0 | 203 ResourceMark rm(THREAD); |
204 klassVtable *vt = instanceKlass::cast(klass())->vtable(); | |
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205 return vt->index_of_miranda(name, signature); |
0 | 206 } |
207 | |
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208 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { |
0 | 209 instanceKlass *ik = instanceKlass::cast(klass()); |
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210 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature)); |
0 | 211 } |
212 | |
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213 void LinkResolver::lookup_implicit_method(methodHandle& result, |
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214 KlassHandle klass, Symbol* name, Symbol* signature, |
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215 KlassHandle current_klass, |
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216 TRAPS) { |
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217 if (EnableMethodHandles && |
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218 klass() == SystemDictionary::MethodHandle_klass() && |
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219 methodOopDesc::is_method_handle_invoke_name(name)) { |
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220 if (!THREAD->is_Compiler_thread() && !MethodHandles::enabled()) { |
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221 // Make sure the Java part of the runtime has been booted up. |
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222 klassOop natives = SystemDictionary::MethodHandleNatives_klass(); |
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223 if (natives == NULL || instanceKlass::cast(natives)->is_not_initialized()) { |
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224 Symbol* natives_name = vmSymbols::java_lang_invoke_MethodHandleNatives(); |
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225 if (natives != NULL && AllowTransitionalJSR292) natives_name = Klass::cast(natives)->name(); |
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226 SystemDictionary::resolve_or_fail(natives_name, |
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227 Handle(), |
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228 Handle(), |
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229 true, |
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230 CHECK); |
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231 } |
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232 } |
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233 methodOop result_oop = SystemDictionary::find_method_handle_invoke(name, |
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234 signature, |
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235 current_klass, |
710 | 236 CHECK); |
237 if (result_oop != NULL) { | |
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238 assert(result_oop->is_method_handle_invoke() && result_oop->signature() == signature, "consistent"); |
710 | 239 result = methodHandle(THREAD, result_oop); |
240 } | |
241 } | |
242 } | |
243 | |
0 | 244 void LinkResolver::check_method_accessability(KlassHandle ref_klass, |
245 KlassHandle resolved_klass, | |
246 KlassHandle sel_klass, | |
247 methodHandle sel_method, | |
248 TRAPS) { | |
249 | |
250 AccessFlags flags = sel_method->access_flags(); | |
251 | |
252 // Special case: arrays always override "clone". JVMS 2.15. | |
253 // If the resolved klass is an array class, and the declaring class | |
254 // is java.lang.Object and the method is "clone", set the flags | |
255 // to public. | |
256 // | |
257 // We'll check for the method name first, as that's most likely | |
258 // to be false (so we'll short-circuit out of these tests). | |
259 if (sel_method->name() == vmSymbols::clone_name() && | |
1142 | 260 sel_klass() == SystemDictionary::Object_klass() && |
0 | 261 resolved_klass->oop_is_array()) { |
262 // We need to change "protected" to "public". | |
263 assert(flags.is_protected(), "clone not protected?"); | |
264 jint new_flags = flags.as_int(); | |
265 new_flags = new_flags & (~JVM_ACC_PROTECTED); | |
266 new_flags = new_flags | JVM_ACC_PUBLIC; | |
267 flags.set_flags(new_flags); | |
268 } | |
269 | |
270 if (!Reflection::verify_field_access(ref_klass->as_klassOop(), | |
271 resolved_klass->as_klassOop(), | |
272 sel_klass->as_klassOop(), | |
273 flags, | |
274 true)) { | |
275 ResourceMark rm(THREAD); | |
276 Exceptions::fthrow( | |
277 THREAD_AND_LOCATION, | |
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278 vmSymbols::java_lang_IllegalAccessError(), |
0 | 279 "tried to access method %s.%s%s from class %s", |
280 sel_klass->external_name(), | |
281 sel_method->name()->as_C_string(), | |
282 sel_method->signature()->as_C_string(), | |
283 ref_klass->external_name() | |
284 ); | |
285 return; | |
286 } | |
287 } | |
288 | |
289 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle& resolved_klass, | |
290 constantPoolHandle pool, int index, TRAPS) { | |
291 | |
292 // resolve klass | |
293 resolve_klass(resolved_klass, pool, index, CHECK); | |
294 | |
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295 Symbol* method_name = pool->name_ref_at(index); |
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296 Symbol* method_signature = pool->signature_ref_at(index); |
0 | 297 KlassHandle current_klass(THREAD, pool->pool_holder()); |
298 | |
299 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
300 } | |
301 | |
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302 void LinkResolver::resolve_dynamic_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) { |
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303 // The class is java.lang.invoke.MethodHandle |
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304 resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); |
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305 |
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306 Symbol* method_name = vmSymbols::invokeExact_name(); |
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307 |
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308 Symbol* method_signature = pool->signature_ref_at(index); |
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309 KlassHandle current_klass (THREAD, pool->pool_holder()); |
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310 |
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311 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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312 } |
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313 |
0 | 314 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) { |
315 | |
316 // resolve klass | |
317 resolve_klass(resolved_klass, pool, index, CHECK); | |
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318 Symbol* method_name = pool->name_ref_at(index); |
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319 Symbol* method_signature = pool->signature_ref_at(index); |
0 | 320 KlassHandle current_klass(THREAD, pool->pool_holder()); |
321 | |
322 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
323 } | |
324 | |
325 | |
326 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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327 Symbol* method_name, Symbol* method_signature, |
0 | 328 KlassHandle current_klass, bool check_access, TRAPS) { |
329 | |
330 // 1. check if klass is not interface | |
331 if (resolved_klass->is_interface()) { | |
332 char buf[200]; | |
333 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name()); | |
334 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
335 } | |
336 | |
337 // 2. lookup method in resolved klass and its super klasses | |
338 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
339 | |
340 if (resolved_method.is_null()) { // not found in the class hierarchy | |
341 // 3. lookup method in all the interfaces implemented by the resolved klass | |
342 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
343 | |
344 if (resolved_method.is_null()) { | |
710 | 345 // JSR 292: see if this is an implicitly generated method MethodHandle.invoke(*...) |
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346 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, CHECK); |
710 | 347 } |
348 | |
349 if (resolved_method.is_null()) { | |
0 | 350 // 4. method lookup failed |
351 ResourceMark rm(THREAD); | |
352 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), | |
353 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
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354 method_name, |
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355 method_signature)); |
0 | 356 } |
357 } | |
358 | |
359 // 5. check if method is concrete | |
360 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { | |
361 ResourceMark rm(THREAD); | |
362 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
363 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
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364 method_name, |
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365 method_signature)); |
0 | 366 } |
367 | |
368 // 6. access checks, access checking may be turned off when calling from within the VM. | |
369 if (check_access) { | |
370 assert(current_klass.not_null() , "current_klass should not be null"); | |
371 | |
372 // check if method can be accessed by the referring class | |
373 check_method_accessability(current_klass, | |
374 resolved_klass, | |
375 KlassHandle(THREAD, resolved_method->method_holder()), | |
376 resolved_method, | |
377 CHECK); | |
378 | |
379 // check loader constraints | |
380 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); | |
381 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); | |
382 { | |
383 ResourceMark rm(THREAD); | |
384 char* failed_type_name = | |
385 SystemDictionary::check_signature_loaders(method_signature, loader, | |
386 class_loader, true, CHECK); | |
387 if (failed_type_name != NULL) { | |
388 const char* msg = "loader constraint violation: when resolving method" | |
389 " \"%s\" the class loader (instance of %s) of the current class, %s," | |
390 " and the class loader (instance of %s) for resolved class, %s, have" | |
391 " different Class objects for the type %s used in the signature"; | |
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392 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); |
0 | 393 const char* loader1 = SystemDictionary::loader_name(loader()); |
394 char* current = instanceKlass::cast(current_klass())->name()->as_C_string(); | |
395 const char* loader2 = SystemDictionary::loader_name(class_loader()); | |
396 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); | |
397 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + | |
398 strlen(current) + strlen(loader2) + strlen(resolved) + | |
399 strlen(failed_type_name); | |
400 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
401 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
402 resolved, failed_type_name); | |
403 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
404 } | |
405 } | |
406 } | |
407 } | |
408 | |
409 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, | |
410 KlassHandle resolved_klass, | |
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411 Symbol* method_name, |
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412 Symbol* method_signature, |
0 | 413 KlassHandle current_klass, |
414 bool check_access, TRAPS) { | |
415 | |
416 // check if klass is interface | |
417 if (!resolved_klass->is_interface()) { | |
418 char buf[200]; | |
419 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name()); | |
420 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
421 } | |
422 | |
423 // lookup method in this interface or its super, java.lang.Object | |
424 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
425 | |
426 if (resolved_method.is_null()) { | |
427 // lookup method in all the super-interfaces | |
428 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
429 if (resolved_method.is_null()) { | |
430 // no method found | |
431 ResourceMark rm(THREAD); | |
432 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), | |
433 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
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434 method_name, |
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435 method_signature)); |
0 | 436 } |
437 } | |
438 | |
439 if (check_access) { | |
440 HandleMark hm(THREAD); | |
441 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); | |
442 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); | |
443 { | |
444 ResourceMark rm(THREAD); | |
445 char* failed_type_name = | |
446 SystemDictionary::check_signature_loaders(method_signature, loader, | |
447 class_loader, true, CHECK); | |
448 if (failed_type_name != NULL) { | |
449 const char* msg = "loader constraint violation: when resolving " | |
450 "interface method \"%s\" the class loader (instance of %s) of the " | |
451 "current class, %s, and the class loader (instance of %s) for " | |
452 "resolved class, %s, have different Class objects for the type %s " | |
453 "used in the signature"; | |
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454 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); |
0 | 455 const char* loader1 = SystemDictionary::loader_name(loader()); |
456 char* current = instanceKlass::cast(current_klass())->name()->as_C_string(); | |
457 const char* loader2 = SystemDictionary::loader_name(class_loader()); | |
458 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); | |
459 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + | |
460 strlen(current) + strlen(loader2) + strlen(resolved) + | |
461 strlen(failed_type_name); | |
462 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
463 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
464 resolved, failed_type_name); | |
465 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
466 } | |
467 } | |
468 } | |
469 } | |
470 | |
471 //------------------------------------------------------------------------------------------------------------------------ | |
472 // Field resolution | |
473 | |
474 void LinkResolver::check_field_accessability(KlassHandle ref_klass, | |
475 KlassHandle resolved_klass, | |
476 KlassHandle sel_klass, | |
477 fieldDescriptor& fd, | |
478 TRAPS) { | |
479 if (!Reflection::verify_field_access(ref_klass->as_klassOop(), | |
480 resolved_klass->as_klassOop(), | |
481 sel_klass->as_klassOop(), | |
482 fd.access_flags(), | |
483 true)) { | |
484 ResourceMark rm(THREAD); | |
485 Exceptions::fthrow( | |
486 THREAD_AND_LOCATION, | |
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487 vmSymbols::java_lang_IllegalAccessError(), |
0 | 488 "tried to access field %s.%s from class %s", |
489 sel_klass->external_name(), | |
490 fd.name()->as_C_string(), | |
491 ref_klass->external_name() | |
492 ); | |
493 return; | |
494 } | |
495 } | |
496 | |
497 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) { | |
498 resolve_field(result, pool, index, byte, check_only, true, CHECK); | |
499 } | |
500 | |
501 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) { | |
502 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || | |
503 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode"); | |
504 | |
505 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); | |
506 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); | |
507 | |
508 // resolve specified klass | |
509 KlassHandle resolved_klass; | |
510 if (update_pool) { | |
511 resolve_klass(resolved_klass, pool, index, CHECK); | |
512 } else { | |
513 resolve_klass_no_update(resolved_klass, pool, index, CHECK); | |
514 } | |
515 // Load these early in case the resolve of the containing klass fails | |
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516 Symbol* field = pool->name_ref_at(index); |
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517 Symbol* sig = pool->signature_ref_at(index); |
0 | 518 // Check if there's a resolved klass containing the field |
519 if( resolved_klass.is_null() ) { | |
520 ResourceMark rm(THREAD); | |
521 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
522 } | |
523 | |
524 // Resolve instance field | |
525 fieldDescriptor fd; // find_field initializes fd if found | |
526 KlassHandle sel_klass(THREAD, instanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); | |
527 // check if field exists; i.e., if a klass containing the field def has been selected | |
528 if (sel_klass.is_null()){ | |
529 ResourceMark rm(THREAD); | |
530 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
531 } | |
532 | |
533 // check access | |
534 KlassHandle ref_klass(THREAD, pool->pool_holder()); | |
535 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK); | |
536 | |
537 // check for errors | |
538 if (is_static != fd.is_static()) { | |
539 char msg[200]; | |
540 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", Klass::cast(resolved_klass())->external_name(), fd.name()->as_C_string()); | |
541 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); | |
542 } | |
543 | |
544 // Final fields can only be accessed from its own class. | |
545 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) { | |
546 THROW(vmSymbols::java_lang_IllegalAccessError()); | |
547 } | |
548 | |
549 // initialize resolved_klass if necessary | |
550 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) | |
551 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) | |
552 // | |
553 // note 2: we don't want to force initialization if we are just checking | |
554 // if the field access is legal; e.g., during compilation | |
555 if (is_static && !check_only) { | |
556 sel_klass->initialize(CHECK); | |
557 } | |
558 | |
559 { | |
560 HandleMark hm(THREAD); | |
561 Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader()); | |
562 Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader()); | |
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563 Symbol* signature_ref = pool->signature_ref_at(index); |
0 | 564 { |
565 ResourceMark rm(THREAD); | |
566 char* failed_type_name = | |
567 SystemDictionary::check_signature_loaders(signature_ref, | |
568 ref_loader, sel_loader, | |
569 false, | |
570 CHECK); | |
571 if (failed_type_name != NULL) { | |
572 const char* msg = "loader constraint violation: when resolving field" | |
573 " \"%s\" the class loader (instance of %s) of the referring class, " | |
574 "%s, and the class loader (instance of %s) for the field's resolved " | |
575 "type, %s, have different Class objects for that type"; | |
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576 char* field_name = field->as_C_string(); |
0 | 577 const char* loader1 = SystemDictionary::loader_name(ref_loader()); |
578 char* sel = instanceKlass::cast(sel_klass())->name()->as_C_string(); | |
579 const char* loader2 = SystemDictionary::loader_name(sel_loader()); | |
580 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + | |
581 strlen(sel) + strlen(loader2) + strlen(failed_type_name); | |
582 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
583 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, | |
584 failed_type_name); | |
585 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
586 } | |
587 } | |
588 } | |
589 | |
590 // return information. note that the klass is set to the actual klass containing the | |
591 // field, otherwise access of static fields in superclasses will not work. | |
592 KlassHandle holder (THREAD, fd.field_holder()); | |
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593 Symbol* name = fd.name(); |
0 | 594 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags()); |
595 } | |
596 | |
597 | |
598 //------------------------------------------------------------------------------------------------------------------------ | |
599 // Invoke resolution | |
600 // | |
601 // Naming conventions: | |
602 // | |
603 // resolved_method the specified method (i.e., static receiver specified via constant pool index) | |
604 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) | |
605 // resolved_klass the specified klass (i.e., specified via constant pool index) | |
606 // recv_klass the receiver klass | |
607 | |
608 | |
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609 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, |
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610 Symbol* method_signature, KlassHandle current_klass, |
0 | 611 bool check_access, bool initialize_class, TRAPS) { |
612 methodHandle resolved_method; | |
613 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
614 resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder())); | |
615 | |
616 // Initialize klass (this should only happen if everything is ok) | |
617 if (initialize_class && resolved_klass->should_be_initialized()) { | |
618 resolved_klass->initialize(CHECK); | |
619 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
620 } | |
621 | |
622 // setup result | |
623 result.set_static(resolved_klass, resolved_method, CHECK); | |
624 } | |
625 | |
626 // throws linktime exceptions | |
627 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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628 Symbol* method_name, Symbol* method_signature, |
0 | 629 KlassHandle current_klass, bool check_access, TRAPS) { |
630 | |
631 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
632 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); | |
633 | |
634 // check if static | |
635 if (!resolved_method->is_static()) { | |
636 char buf[200]; | |
637 jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
638 resolved_method->name(), | |
639 resolved_method->signature())); | |
640 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
641 } | |
642 } | |
643 | |
644 | |
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645 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, |
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646 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
0 | 647 methodHandle resolved_method; |
648 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
649 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); | |
650 } | |
651 | |
652 // throws linktime exceptions | |
653 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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654 Symbol* method_name, Symbol* method_signature, |
0 | 655 KlassHandle current_klass, bool check_access, TRAPS) { |
656 | |
657 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
658 | |
659 // check if method name is <init>, that it is found in same klass as static type | |
660 if (resolved_method->name() == vmSymbols::object_initializer_name() && | |
661 resolved_method->method_holder() != resolved_klass()) { | |
662 ResourceMark rm(THREAD); | |
663 Exceptions::fthrow( | |
664 THREAD_AND_LOCATION, | |
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665 vmSymbols::java_lang_NoSuchMethodError(), |
0 | 666 "%s: method %s%s not found", |
667 resolved_klass->external_name(), | |
668 resolved_method->name()->as_C_string(), | |
669 resolved_method->signature()->as_C_string() | |
670 ); | |
671 return; | |
672 } | |
673 | |
674 // check if not static | |
675 if (resolved_method->is_static()) { | |
676 char buf[200]; | |
677 jio_snprintf(buf, sizeof(buf), | |
678 "Expecting non-static method %s", | |
679 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
680 resolved_method->name(), | |
681 resolved_method->signature())); | |
682 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
683 } | |
684 } | |
685 | |
686 // throws runtime exceptions | |
687 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
688 KlassHandle current_klass, bool check_access, TRAPS) { | |
689 | |
690 // resolved method is selected method unless we have an old-style lookup | |
691 methodHandle sel_method(THREAD, resolved_method()); | |
692 | |
693 // check if this is an old-style super call and do a new lookup if so | |
694 { KlassHandle method_klass = KlassHandle(THREAD, | |
695 resolved_method->method_holder()); | |
696 | |
697 if (check_access && | |
698 // a) check if ACC_SUPER flag is set for the current class | |
699 current_klass->is_super() && | |
700 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!) | |
701 current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() && | |
702 // c) check if the method is not <init> | |
703 resolved_method->name() != vmSymbols::object_initializer_name()) { | |
704 // Lookup super method | |
705 KlassHandle super_klass(THREAD, current_klass->super()); | |
706 lookup_instance_method_in_klasses(sel_method, super_klass, | |
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707 resolved_method->name(), |
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708 resolved_method->signature(), CHECK); |
0 | 709 // check if found |
710 if (sel_method.is_null()) { | |
711 ResourceMark rm(THREAD); | |
712 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
713 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
714 resolved_method->name(), | |
715 resolved_method->signature())); | |
716 } | |
717 } | |
718 } | |
719 | |
720 // check if not static | |
721 if (sel_method->is_static()) { | |
722 char buf[200]; | |
723 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
724 resolved_method->name(), | |
725 resolved_method->signature())); | |
726 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
727 } | |
728 | |
729 // check if abstract | |
730 if (sel_method->is_abstract()) { | |
731 ResourceMark rm(THREAD); | |
732 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
733 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
734 sel_method->name(), | |
735 sel_method->signature())); | |
736 } | |
737 | |
738 // setup result | |
739 result.set_static(resolved_klass, sel_method, CHECK); | |
740 } | |
741 | |
742 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, | |
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743 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
0 | 744 bool check_access, bool check_null_and_abstract, TRAPS) { |
745 methodHandle resolved_method; | |
746 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
747 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); | |
748 } | |
749 | |
750 // throws linktime exceptions | |
751 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, | |
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752 Symbol* method_name, Symbol* method_signature, |
0 | 753 KlassHandle current_klass, bool check_access, TRAPS) { |
754 // normal method resolution | |
755 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
756 | |
757 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
758 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
759 | |
760 // check if not static | |
761 if (resolved_method->is_static()) { | |
762 char buf[200]; | |
763 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
764 resolved_method->name(), | |
765 resolved_method->signature())); | |
766 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
767 } | |
768 } | |
769 | |
770 // throws runtime exceptions | |
771 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, | |
772 methodHandle resolved_method, | |
773 KlassHandle resolved_klass, | |
774 Handle recv, | |
775 KlassHandle recv_klass, | |
776 bool check_null_and_abstract, | |
777 TRAPS) { | |
778 | |
779 // setup default return values | |
780 int vtable_index = methodOopDesc::invalid_vtable_index; | |
781 methodHandle selected_method; | |
782 | |
783 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); | |
784 | |
785 // runtime method resolution | |
786 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists | |
787 THROW(vmSymbols::java_lang_NullPointerException()); | |
788 } | |
789 | |
790 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's | |
791 // has not been rewritten, and the vtable initialized. | |
792 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); | |
793 | |
794 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's | |
795 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since | |
796 // a missing receiver might result in a bogus lookup. | |
797 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); | |
798 | |
799 // do lookup based on receiver klass using the vtable index | |
800 if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method | |
801 vtable_index = vtable_index_of_miranda_method(resolved_klass, | |
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802 resolved_method->name(), |
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803 resolved_method->signature(), CHECK); |
0 | 804 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); |
805 | |
806 instanceKlass* inst = instanceKlass::cast(recv_klass()); | |
807 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); | |
808 } else { | |
809 // at this point we are sure that resolved_method is virtual and not | |
810 // a miranda method; therefore, it must have a valid vtable index. | |
811 vtable_index = resolved_method->vtable_index(); | |
812 // We could get a negative vtable_index for final methods, | |
813 // because as an optimization they are they are never put in the vtable, | |
814 // unless they override an existing method. | |
815 // If we do get a negative, it means the resolved method is the the selected | |
816 // method, and it can never be changed by an override. | |
817 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) { | |
818 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); | |
819 selected_method = resolved_method; | |
820 } else { | |
821 // recv_klass might be an arrayKlassOop but all vtables start at | |
822 // the same place. The cast is to avoid virtual call and assertion. | |
823 instanceKlass* inst = (instanceKlass*)recv_klass()->klass_part(); | |
824 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); | |
825 } | |
826 } | |
827 | |
828 // check if method exists | |
829 if (selected_method.is_null()) { | |
830 ResourceMark rm(THREAD); | |
831 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
832 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
833 resolved_method->name(), | |
834 resolved_method->signature())); | |
835 } | |
836 | |
837 // check if abstract | |
838 if (check_null_and_abstract && selected_method->is_abstract()) { | |
839 ResourceMark rm(THREAD); | |
840 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
841 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
842 selected_method->name(), | |
843 selected_method->signature())); | |
844 } | |
845 | |
846 // setup result | |
847 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); | |
848 } | |
849 | |
850 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, | |
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851 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
0 | 852 bool check_access, bool check_null_and_abstract, TRAPS) { |
853 methodHandle resolved_method; | |
854 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
855 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); | |
856 } | |
857 | |
858 // throws linktime exceptions | |
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859 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, |
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860 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
0 | 861 // normal interface method resolution |
862 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
863 | |
864 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
865 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
866 } | |
867 | |
868 // throws runtime exceptions | |
869 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
870 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { | |
871 // check if receiver exists | |
872 if (check_null_and_abstract && recv.is_null()) { | |
873 THROW(vmSymbols::java_lang_NullPointerException()); | |
874 } | |
875 | |
876 // check if receiver klass implements the resolved interface | |
877 if (!recv_klass->is_subtype_of(resolved_klass())) { | |
878 char buf[200]; | |
879 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", | |
880 (Klass::cast(recv_klass()))->external_name(), | |
881 (Klass::cast(resolved_klass()))->external_name()); | |
882 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
883 } | |
884 // do lookup based on receiver klass | |
885 methodHandle sel_method; | |
886 lookup_instance_method_in_klasses(sel_method, recv_klass, | |
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887 resolved_method->name(), |
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888 resolved_method->signature(), CHECK); |
0 | 889 // check if method exists |
890 if (sel_method.is_null()) { | |
891 ResourceMark rm(THREAD); | |
892 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
893 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), | |
894 resolved_method->name(), | |
895 resolved_method->signature())); | |
896 } | |
897 // check if public | |
898 if (!sel_method->is_public()) { | |
899 ResourceMark rm(THREAD); | |
900 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), | |
901 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), | |
902 sel_method->name(), | |
903 sel_method->signature())); | |
904 } | |
905 // check if abstract | |
906 if (check_null_and_abstract && sel_method->is_abstract()) { | |
907 ResourceMark rm(THREAD); | |
908 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
909 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), | |
910 sel_method->name(), | |
911 sel_method->signature())); | |
912 } | |
913 // setup result | |
914 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK); | |
915 } | |
916 | |
917 | |
918 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( | |
919 KlassHandle resolved_klass, | |
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920 Symbol* method_name, |
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921 Symbol* method_signature, |
0 | 922 KlassHandle current_klass, |
923 bool check_access) { | |
924 EXCEPTION_MARK; | |
925 methodHandle method_result; | |
926 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
927 if (HAS_PENDING_EXCEPTION) { | |
928 CLEAR_PENDING_EXCEPTION; | |
929 return methodHandle(); | |
930 } else { | |
931 return method_result; | |
932 } | |
933 } | |
934 | |
935 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( | |
936 KlassHandle resolved_klass, | |
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937 Symbol* method_name, |
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938 Symbol* method_signature, |
0 | 939 KlassHandle current_klass, |
940 bool check_access) { | |
941 EXCEPTION_MARK; | |
942 methodHandle method_result; | |
943 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
944 if (HAS_PENDING_EXCEPTION) { | |
945 CLEAR_PENDING_EXCEPTION; | |
946 return methodHandle(); | |
947 } else { | |
948 return method_result; | |
949 } | |
950 } | |
951 | |
952 methodHandle LinkResolver::resolve_virtual_call_or_null( | |
953 KlassHandle receiver_klass, | |
954 KlassHandle resolved_klass, | |
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955 Symbol* name, |
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956 Symbol* signature, |
0 | 957 KlassHandle current_klass) { |
958 EXCEPTION_MARK; | |
959 CallInfo info; | |
960 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
961 if (HAS_PENDING_EXCEPTION) { | |
962 CLEAR_PENDING_EXCEPTION; | |
963 return methodHandle(); | |
964 } | |
965 return info.selected_method(); | |
966 } | |
967 | |
968 methodHandle LinkResolver::resolve_interface_call_or_null( | |
969 KlassHandle receiver_klass, | |
970 KlassHandle resolved_klass, | |
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971 Symbol* name, |
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972 Symbol* signature, |
0 | 973 KlassHandle current_klass) { |
974 EXCEPTION_MARK; | |
975 CallInfo info; | |
976 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
977 if (HAS_PENDING_EXCEPTION) { | |
978 CLEAR_PENDING_EXCEPTION; | |
979 return methodHandle(); | |
980 } | |
981 return info.selected_method(); | |
982 } | |
983 | |
984 int LinkResolver::resolve_virtual_vtable_index( | |
985 KlassHandle receiver_klass, | |
986 KlassHandle resolved_klass, | |
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987 Symbol* name, |
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988 Symbol* signature, |
0 | 989 KlassHandle current_klass) { |
990 EXCEPTION_MARK; | |
991 CallInfo info; | |
992 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
993 if (HAS_PENDING_EXCEPTION) { | |
994 CLEAR_PENDING_EXCEPTION; | |
995 return methodOopDesc::invalid_vtable_index; | |
996 } | |
997 return info.vtable_index(); | |
998 } | |
999 | |
1000 methodHandle LinkResolver::resolve_static_call_or_null( | |
1001 KlassHandle resolved_klass, | |
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1002 Symbol* name, |
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1003 Symbol* signature, |
0 | 1004 KlassHandle current_klass) { |
1005 EXCEPTION_MARK; | |
1006 CallInfo info; | |
1007 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
1008 if (HAS_PENDING_EXCEPTION) { | |
1009 CLEAR_PENDING_EXCEPTION; | |
1010 return methodHandle(); | |
1011 } | |
1012 return info.selected_method(); | |
1013 } | |
1014 | |
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1015 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, |
0 | 1016 KlassHandle current_klass) { |
1017 EXCEPTION_MARK; | |
1018 CallInfo info; | |
1019 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); | |
1020 if (HAS_PENDING_EXCEPTION) { | |
1021 CLEAR_PENDING_EXCEPTION; | |
1022 return methodHandle(); | |
1023 } | |
1024 return info.selected_method(); | |
1025 } | |
1026 | |
1027 | |
1028 | |
1029 //------------------------------------------------------------------------------------------------------------------------ | |
1030 // ConstantPool entries | |
1031 | |
1032 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { | |
1033 switch (byte) { | |
1034 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; | |
1035 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; | |
1036 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; | |
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1037 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; |
0 | 1038 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; |
1039 } | |
1040 return; | |
1041 } | |
1042 | |
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1043 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, |
0 | 1044 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { |
1045 // resolve klass | |
1046 resolve_klass(resolved_klass, pool, index, CHECK); | |
1047 | |
1048 // Get name, signature, and static klass | |
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1049 method_name = pool->name_ref_at(index); |
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1050 method_signature = pool->signature_ref_at(index); |
0 | 1051 current_klass = KlassHandle(THREAD, pool->pool_holder()); |
1052 } | |
1053 | |
1054 | |
1055 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
1056 KlassHandle resolved_klass; | |
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1057 Symbol* method_name = NULL; |
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1058 Symbol* method_signature = NULL; |
0 | 1059 KlassHandle current_klass; |
1060 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1061 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
1062 } | |
1063 | |
1064 | |
1065 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
1066 KlassHandle resolved_klass; | |
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1067 Symbol* method_name = NULL; |
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1068 Symbol* method_signature = NULL; |
0 | 1069 KlassHandle current_klass; |
1070 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1071 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
1072 } | |
1073 | |
1074 | |
1075 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, | |
1076 constantPoolHandle pool, int index, | |
1077 TRAPS) { | |
1078 | |
1079 KlassHandle resolved_klass; | |
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1080 Symbol* method_name = NULL; |
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1081 Symbol* method_signature = NULL; |
0 | 1082 KlassHandle current_klass; |
1083 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1084 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); | |
1085 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
1086 } | |
1087 | |
1088 | |
1089 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { | |
1090 KlassHandle resolved_klass; | |
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1091 Symbol* method_name = NULL; |
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1092 Symbol* method_signature = NULL; |
0 | 1093 KlassHandle current_klass; |
1094 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1095 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); | |
1096 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
1097 } | |
1098 | |
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1099 |
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1100 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int raw_index, TRAPS) { |
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1101 assert(EnableInvokeDynamic, ""); |
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1102 |
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1103 // This guy is reached from InterpreterRuntime::resolve_invokedynamic. |
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1104 |
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1105 // At this point, we only need the signature, and can ignore the name. |
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1106 Symbol* method_signature = pool->signature_ref_at(raw_index); // raw_index works directly |
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1107 Symbol* method_name = vmSymbols::invokeExact_name(); |
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1108 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); |
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1109 |
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1110 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) |
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1111 // The extra MH receiver will be inserted into the stack on every call. |
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1112 methodHandle resolved_method; |
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1113 KlassHandle current_klass(THREAD, pool->pool_holder()); |
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1114 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, CHECK); |
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1115 if (resolved_method.is_null()) { |
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1116 THROW(vmSymbols::java_lang_InternalError()); |
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1117 } |
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1118 result.set_dynamic(resolved_method, CHECK); |
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1119 } |
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1120 |
0 | 1121 //------------------------------------------------------------------------------------------------------------------------ |
1122 #ifndef PRODUCT | |
1123 | |
1124 void FieldAccessInfo::print() { | |
1125 ResourceMark rm; | |
1126 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset()); | |
1127 } | |
1128 | |
1129 #endif |