Mercurial > hg > truffle
annotate src/share/vm/interpreter/linkResolver.cpp @ 1604:b918d354830a
6960865: ldc of unloaded class throws an assert in ciTypeFlow
Summary: Support java_mirror for unloaded klasses, arrays as well as instances. Simplify ciTypeFlow by removing unused path.
Reviewed-by: kvn
author | jrose |
---|---|
date | Sat, 12 Jun 2010 22:53:43 -0700 |
parents | c18cbe5936b8 |
children | 083fde3b838e |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2009, 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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_linkResolver.cpp.incl" | |
27 | |
28 //------------------------------------------------------------------------------------------------------------------------ | |
29 // Implementation of FieldAccessInfo | |
30 | |
31 void FieldAccessInfo::set(KlassHandle klass, symbolHandle name, int field_index, int field_offset, | |
32 BasicType field_type, AccessFlags access_flags) { | |
33 _klass = klass; | |
34 _name = name; | |
35 _field_index = field_index; | |
36 _field_offset = field_offset; | |
37 _field_type = field_type; | |
38 _access_flags = access_flags; | |
39 } | |
40 | |
41 | |
42 //------------------------------------------------------------------------------------------------------------------------ | |
43 // Implementation of CallInfo | |
44 | |
45 | |
46 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) { | |
47 int vtable_index = methodOopDesc::nonvirtual_vtable_index; | |
48 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); | |
49 } | |
50 | |
51 | |
52 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) { | |
53 // This is only called for interface methods. If the resolved_method | |
54 // comes from java/lang/Object, it can be the subject of a virtual call, so | |
55 // we should pick the vtable index from the resolved method. | |
56 // Other than that case, there is no valid vtable index to specify. | |
57 int vtable_index = methodOopDesc::invalid_vtable_index; | |
1142 | 58 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) { |
0 | 59 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check"); |
60 vtable_index = resolved_method->vtable_index(); | |
61 } | |
62 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); | |
63 } | |
64 | |
65 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { | |
66 assert(vtable_index >= 0 || vtable_index == methodOopDesc::nonvirtual_vtable_index, "valid index"); | |
67 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); | |
68 } | |
69 | |
70 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { | |
71 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond"); | |
72 _resolved_klass = resolved_klass; | |
73 _selected_klass = selected_klass; | |
74 _resolved_method = resolved_method; | |
75 _selected_method = selected_method; | |
76 _vtable_index = vtable_index; | |
77 if (CompilationPolicy::mustBeCompiled(selected_method)) { | |
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78 // This path is unusual, mostly used by the '-Xcomp' stress test mode. |
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79 |
0 | 80 // Note: with several active threads, the mustBeCompiled may be true |
81 // while canBeCompiled is false; remove assert | |
82 // assert(CompilationPolicy::canBeCompiled(selected_method), "cannot compile"); | |
83 if (THREAD->is_Compiler_thread()) { | |
84 // don't force compilation, resolve was on behalf of compiler | |
85 return; | |
86 } | |
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87 if (instanceKlass::cast(selected_method->method_holder())->is_not_initialized()) { |
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88 // 'is_not_initialized' means not only '!is_initialized', but also that |
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89 // initialization has not been started yet ('!being_initialized') |
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90 // Do not force compilation of methods in uninitialized classes. |
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91 // Note that doing this would throw an assert later, |
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92 // in CompileBroker::compile_method. |
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93 // We sometimes use the link resolver to do reflective lookups |
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94 // even before classes are initialized. |
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95 return; |
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96 } |
0 | 97 CompileBroker::compile_method(selected_method, InvocationEntryBci, |
98 methodHandle(), 0, "mustBeCompiled", CHECK); | |
99 } | |
100 } | |
101 | |
102 | |
103 //------------------------------------------------------------------------------------------------------------------------ | |
104 // Klass resolution | |
105 | |
106 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) { | |
107 if (!Reflection::verify_class_access(ref_klass->as_klassOop(), | |
108 sel_klass->as_klassOop(), | |
109 true)) { | |
110 ResourceMark rm(THREAD); | |
111 Exceptions::fthrow( | |
112 THREAD_AND_LOCATION, | |
113 vmSymbolHandles::java_lang_IllegalAccessError(), | |
114 "tried to access class %s from class %s", | |
115 sel_klass->external_name(), | |
116 ref_klass->external_name() | |
117 ); | |
118 return; | |
119 } | |
120 } | |
121 | |
122 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { | |
123 klassOop result_oop = pool->klass_ref_at(index, CHECK); | |
124 result = KlassHandle(THREAD, result_oop); | |
125 } | |
126 | |
127 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { | |
128 klassOop result_oop = | |
129 constantPoolOopDesc::klass_ref_at_if_loaded_check(pool, index, CHECK); | |
130 result = KlassHandle(THREAD, result_oop); | |
131 } | |
132 | |
133 | |
134 //------------------------------------------------------------------------------------------------------------------------ | |
135 // Method resolution | |
136 // | |
137 // According to JVM spec. $5.4.3c & $5.4.3d | |
138 | |
139 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) { | |
140 methodOop result_oop = klass->uncached_lookup_method(name(), signature()); | |
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141 if (EnableMethodHandles && result_oop != NULL) { |
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142 switch (result_oop->intrinsic_id()) { |
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143 case vmIntrinsics::_invokeExact: |
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144 case vmIntrinsics::_invokeGeneric: |
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145 case vmIntrinsics::_invokeDynamic: |
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146 // Do not link directly to these. The VM must produce a synthetic one using lookup_implicit_method. |
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147 return; |
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148 } |
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149 } |
0 | 150 result = methodHandle(THREAD, result_oop); |
151 } | |
152 | |
153 // returns first instance method | |
154 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) { | |
155 methodOop result_oop = klass->uncached_lookup_method(name(), signature()); | |
156 result = methodHandle(THREAD, result_oop); | |
157 while (!result.is_null() && result->is_static()) { | |
158 klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super()); | |
159 result = methodHandle(THREAD, klass->uncached_lookup_method(name(), signature())); | |
160 } | |
161 } | |
162 | |
163 | |
164 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) { | |
165 ResourceMark rm(THREAD); | |
166 klassVtable *vt = instanceKlass::cast(klass())->vtable(); | |
167 return vt->index_of_miranda(name(), signature()); | |
168 } | |
169 | |
170 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) { | |
171 instanceKlass *ik = instanceKlass::cast(klass()); | |
172 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name(), signature())); | |
173 } | |
174 | |
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175 void LinkResolver::lookup_implicit_method(methodHandle& result, |
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176 KlassHandle klass, symbolHandle name, symbolHandle signature, |
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177 KlassHandle current_klass, |
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178 TRAPS) { |
710 | 179 if (EnableMethodHandles && MethodHandles::enabled() && |
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180 klass() == SystemDictionary::MethodHandle_klass() && |
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181 methodOopDesc::is_method_handle_invoke_name(name())) { |
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182 methodOop result_oop = SystemDictionary::find_method_handle_invoke(name, |
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183 signature, |
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184 current_klass, |
710 | 185 CHECK); |
186 if (result_oop != NULL) { | |
187 assert(result_oop->is_method_handle_invoke() && result_oop->signature() == signature(), "consistent"); | |
188 result = methodHandle(THREAD, result_oop); | |
189 } | |
190 } | |
191 } | |
192 | |
0 | 193 void LinkResolver::check_method_accessability(KlassHandle ref_klass, |
194 KlassHandle resolved_klass, | |
195 KlassHandle sel_klass, | |
196 methodHandle sel_method, | |
197 TRAPS) { | |
198 | |
199 AccessFlags flags = sel_method->access_flags(); | |
200 | |
201 // Special case: arrays always override "clone". JVMS 2.15. | |
202 // If the resolved klass is an array class, and the declaring class | |
203 // is java.lang.Object and the method is "clone", set the flags | |
204 // to public. | |
205 // | |
206 // We'll check for the method name first, as that's most likely | |
207 // to be false (so we'll short-circuit out of these tests). | |
208 if (sel_method->name() == vmSymbols::clone_name() && | |
1142 | 209 sel_klass() == SystemDictionary::Object_klass() && |
0 | 210 resolved_klass->oop_is_array()) { |
211 // We need to change "protected" to "public". | |
212 assert(flags.is_protected(), "clone not protected?"); | |
213 jint new_flags = flags.as_int(); | |
214 new_flags = new_flags & (~JVM_ACC_PROTECTED); | |
215 new_flags = new_flags | JVM_ACC_PUBLIC; | |
216 flags.set_flags(new_flags); | |
217 } | |
218 | |
219 if (!Reflection::verify_field_access(ref_klass->as_klassOop(), | |
220 resolved_klass->as_klassOop(), | |
221 sel_klass->as_klassOop(), | |
222 flags, | |
223 true)) { | |
224 ResourceMark rm(THREAD); | |
225 Exceptions::fthrow( | |
226 THREAD_AND_LOCATION, | |
227 vmSymbolHandles::java_lang_IllegalAccessError(), | |
228 "tried to access method %s.%s%s from class %s", | |
229 sel_klass->external_name(), | |
230 sel_method->name()->as_C_string(), | |
231 sel_method->signature()->as_C_string(), | |
232 ref_klass->external_name() | |
233 ); | |
234 return; | |
235 } | |
236 } | |
237 | |
238 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle& resolved_klass, | |
239 constantPoolHandle pool, int index, TRAPS) { | |
240 | |
241 // resolve klass | |
242 resolve_klass(resolved_klass, pool, index, CHECK); | |
243 | |
244 symbolHandle method_name (THREAD, pool->name_ref_at(index)); | |
245 symbolHandle method_signature (THREAD, pool->signature_ref_at(index)); | |
246 KlassHandle current_klass(THREAD, pool->pool_holder()); | |
247 | |
248 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
249 } | |
250 | |
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251 void LinkResolver::resolve_dynamic_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) { |
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252 // The class is java.dyn.MethodHandle |
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253 resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); |
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254 |
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255 symbolHandle method_name = vmSymbolHandles::invokeExact_name(); |
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256 |
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257 symbolHandle method_signature(THREAD, pool->signature_ref_at(index)); |
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258 KlassHandle current_klass (THREAD, pool->pool_holder()); |
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259 |
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260 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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261 } |
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262 |
0 | 263 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) { |
264 | |
265 // resolve klass | |
266 resolve_klass(resolved_klass, pool, index, CHECK); | |
267 symbolHandle method_name (THREAD, pool->name_ref_at(index)); | |
268 symbolHandle method_signature (THREAD, pool->signature_ref_at(index)); | |
269 KlassHandle current_klass(THREAD, pool->pool_holder()); | |
270 | |
271 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
272 } | |
273 | |
274 | |
275 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
276 symbolHandle method_name, symbolHandle method_signature, | |
277 KlassHandle current_klass, bool check_access, TRAPS) { | |
278 | |
279 // 1. check if klass is not interface | |
280 if (resolved_klass->is_interface()) { | |
281 char buf[200]; | |
282 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name()); | |
283 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
284 } | |
285 | |
286 // 2. lookup method in resolved klass and its super klasses | |
287 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
288 | |
289 if (resolved_method.is_null()) { // not found in the class hierarchy | |
290 // 3. lookup method in all the interfaces implemented by the resolved klass | |
291 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
292 | |
293 if (resolved_method.is_null()) { | |
710 | 294 // JSR 292: see if this is an implicitly generated method MethodHandle.invoke(*...) |
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295 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, CHECK); |
710 | 296 } |
297 | |
298 if (resolved_method.is_null()) { | |
0 | 299 // 4. method lookup failed |
300 ResourceMark rm(THREAD); | |
301 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), | |
302 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
303 method_name(), | |
304 method_signature())); | |
305 } | |
306 } | |
307 | |
308 // 5. check if method is concrete | |
309 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { | |
310 ResourceMark rm(THREAD); | |
311 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
312 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
313 method_name(), | |
314 method_signature())); | |
315 } | |
316 | |
317 // 6. access checks, access checking may be turned off when calling from within the VM. | |
318 if (check_access) { | |
319 assert(current_klass.not_null() , "current_klass should not be null"); | |
320 | |
321 // check if method can be accessed by the referring class | |
322 check_method_accessability(current_klass, | |
323 resolved_klass, | |
324 KlassHandle(THREAD, resolved_method->method_holder()), | |
325 resolved_method, | |
326 CHECK); | |
327 | |
328 // check loader constraints | |
329 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); | |
330 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); | |
331 { | |
332 ResourceMark rm(THREAD); | |
333 char* failed_type_name = | |
334 SystemDictionary::check_signature_loaders(method_signature, loader, | |
335 class_loader, true, CHECK); | |
336 if (failed_type_name != NULL) { | |
337 const char* msg = "loader constraint violation: when resolving method" | |
338 " \"%s\" the class loader (instance of %s) of the current class, %s," | |
339 " and the class loader (instance of %s) for resolved class, %s, have" | |
340 " different Class objects for the type %s used in the signature"; | |
341 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name(),method_signature()); | |
342 const char* loader1 = SystemDictionary::loader_name(loader()); | |
343 char* current = instanceKlass::cast(current_klass())->name()->as_C_string(); | |
344 const char* loader2 = SystemDictionary::loader_name(class_loader()); | |
345 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); | |
346 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + | |
347 strlen(current) + strlen(loader2) + strlen(resolved) + | |
348 strlen(failed_type_name); | |
349 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
350 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
351 resolved, failed_type_name); | |
352 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
353 } | |
354 } | |
355 } | |
356 } | |
357 | |
358 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, | |
359 KlassHandle resolved_klass, | |
360 symbolHandle method_name, | |
361 symbolHandle method_signature, | |
362 KlassHandle current_klass, | |
363 bool check_access, TRAPS) { | |
364 | |
365 // check if klass is interface | |
366 if (!resolved_klass->is_interface()) { | |
367 char buf[200]; | |
368 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name()); | |
369 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
370 } | |
371 | |
372 // lookup method in this interface or its super, java.lang.Object | |
373 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
374 | |
375 if (resolved_method.is_null()) { | |
376 // lookup method in all the super-interfaces | |
377 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
378 if (resolved_method.is_null()) { | |
379 // no method found | |
380 ResourceMark rm(THREAD); | |
381 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), | |
382 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
383 method_name(), | |
384 method_signature())); | |
385 } | |
386 } | |
387 | |
388 if (check_access) { | |
389 HandleMark hm(THREAD); | |
390 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); | |
391 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); | |
392 { | |
393 ResourceMark rm(THREAD); | |
394 char* failed_type_name = | |
395 SystemDictionary::check_signature_loaders(method_signature, loader, | |
396 class_loader, true, CHECK); | |
397 if (failed_type_name != NULL) { | |
398 const char* msg = "loader constraint violation: when resolving " | |
399 "interface method \"%s\" the class loader (instance of %s) of the " | |
400 "current class, %s, and the class loader (instance of %s) for " | |
401 "resolved class, %s, have different Class objects for the type %s " | |
402 "used in the signature"; | |
403 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name(),method_signature()); | |
404 const char* loader1 = SystemDictionary::loader_name(loader()); | |
405 char* current = instanceKlass::cast(current_klass())->name()->as_C_string(); | |
406 const char* loader2 = SystemDictionary::loader_name(class_loader()); | |
407 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); | |
408 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + | |
409 strlen(current) + strlen(loader2) + strlen(resolved) + | |
410 strlen(failed_type_name); | |
411 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
412 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
413 resolved, failed_type_name); | |
414 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
415 } | |
416 } | |
417 } | |
418 } | |
419 | |
420 //------------------------------------------------------------------------------------------------------------------------ | |
421 // Field resolution | |
422 | |
423 void LinkResolver::check_field_accessability(KlassHandle ref_klass, | |
424 KlassHandle resolved_klass, | |
425 KlassHandle sel_klass, | |
426 fieldDescriptor& fd, | |
427 TRAPS) { | |
428 if (!Reflection::verify_field_access(ref_klass->as_klassOop(), | |
429 resolved_klass->as_klassOop(), | |
430 sel_klass->as_klassOop(), | |
431 fd.access_flags(), | |
432 true)) { | |
433 ResourceMark rm(THREAD); | |
434 Exceptions::fthrow( | |
435 THREAD_AND_LOCATION, | |
436 vmSymbolHandles::java_lang_IllegalAccessError(), | |
437 "tried to access field %s.%s from class %s", | |
438 sel_klass->external_name(), | |
439 fd.name()->as_C_string(), | |
440 ref_klass->external_name() | |
441 ); | |
442 return; | |
443 } | |
444 } | |
445 | |
446 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) { | |
447 resolve_field(result, pool, index, byte, check_only, true, CHECK); | |
448 } | |
449 | |
450 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) { | |
451 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || | |
452 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode"); | |
453 | |
454 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); | |
455 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); | |
456 | |
457 // resolve specified klass | |
458 KlassHandle resolved_klass; | |
459 if (update_pool) { | |
460 resolve_klass(resolved_klass, pool, index, CHECK); | |
461 } else { | |
462 resolve_klass_no_update(resolved_klass, pool, index, CHECK); | |
463 } | |
464 // Load these early in case the resolve of the containing klass fails | |
465 symbolOop field = pool->name_ref_at(index); | |
466 symbolHandle field_h (THREAD, field); // preserve in case we need the name | |
467 symbolOop sig = pool->signature_ref_at(index); | |
468 // Check if there's a resolved klass containing the field | |
469 if( resolved_klass.is_null() ) { | |
470 ResourceMark rm(THREAD); | |
471 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
472 } | |
473 | |
474 // Resolve instance field | |
475 fieldDescriptor fd; // find_field initializes fd if found | |
476 KlassHandle sel_klass(THREAD, instanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); | |
477 // check if field exists; i.e., if a klass containing the field def has been selected | |
478 if (sel_klass.is_null()){ | |
479 ResourceMark rm(THREAD); | |
480 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
481 } | |
482 | |
483 // check access | |
484 KlassHandle ref_klass(THREAD, pool->pool_holder()); | |
485 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK); | |
486 | |
487 // check for errors | |
488 if (is_static != fd.is_static()) { | |
489 char msg[200]; | |
490 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()); | |
491 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); | |
492 } | |
493 | |
494 // Final fields can only be accessed from its own class. | |
495 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) { | |
496 THROW(vmSymbols::java_lang_IllegalAccessError()); | |
497 } | |
498 | |
499 // initialize resolved_klass if necessary | |
500 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) | |
501 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) | |
502 // | |
503 // note 2: we don't want to force initialization if we are just checking | |
504 // if the field access is legal; e.g., during compilation | |
505 if (is_static && !check_only) { | |
506 sel_klass->initialize(CHECK); | |
507 } | |
508 | |
509 { | |
510 HandleMark hm(THREAD); | |
511 Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader()); | |
512 Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader()); | |
513 symbolHandle signature_ref (THREAD, pool->signature_ref_at(index)); | |
514 { | |
515 ResourceMark rm(THREAD); | |
516 char* failed_type_name = | |
517 SystemDictionary::check_signature_loaders(signature_ref, | |
518 ref_loader, sel_loader, | |
519 false, | |
520 CHECK); | |
521 if (failed_type_name != NULL) { | |
522 const char* msg = "loader constraint violation: when resolving field" | |
523 " \"%s\" the class loader (instance of %s) of the referring class, " | |
524 "%s, and the class loader (instance of %s) for the field's resolved " | |
525 "type, %s, have different Class objects for that type"; | |
526 char* field_name = field_h()->as_C_string(); | |
527 const char* loader1 = SystemDictionary::loader_name(ref_loader()); | |
528 char* sel = instanceKlass::cast(sel_klass())->name()->as_C_string(); | |
529 const char* loader2 = SystemDictionary::loader_name(sel_loader()); | |
530 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + | |
531 strlen(sel) + strlen(loader2) + strlen(failed_type_name); | |
532 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
533 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, | |
534 failed_type_name); | |
535 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
536 } | |
537 } | |
538 } | |
539 | |
540 // return information. note that the klass is set to the actual klass containing the | |
541 // field, otherwise access of static fields in superclasses will not work. | |
542 KlassHandle holder (THREAD, fd.field_holder()); | |
543 symbolHandle name (THREAD, fd.name()); | |
544 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags()); | |
545 } | |
546 | |
547 | |
548 //------------------------------------------------------------------------------------------------------------------------ | |
549 // Invoke resolution | |
550 // | |
551 // Naming conventions: | |
552 // | |
553 // resolved_method the specified method (i.e., static receiver specified via constant pool index) | |
554 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) | |
555 // resolved_klass the specified klass (i.e., specified via constant pool index) | |
556 // recv_klass the receiver klass | |
557 | |
558 | |
559 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, symbolHandle method_name, | |
560 symbolHandle method_signature, KlassHandle current_klass, | |
561 bool check_access, bool initialize_class, TRAPS) { | |
562 methodHandle resolved_method; | |
563 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
564 resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder())); | |
565 | |
566 // Initialize klass (this should only happen if everything is ok) | |
567 if (initialize_class && resolved_klass->should_be_initialized()) { | |
568 resolved_klass->initialize(CHECK); | |
569 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
570 } | |
571 | |
572 // setup result | |
573 result.set_static(resolved_klass, resolved_method, CHECK); | |
574 } | |
575 | |
576 // throws linktime exceptions | |
577 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
578 symbolHandle method_name, symbolHandle method_signature, | |
579 KlassHandle current_klass, bool check_access, TRAPS) { | |
580 | |
581 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
582 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); | |
583 | |
584 // check if static | |
585 if (!resolved_method->is_static()) { | |
586 char buf[200]; | |
587 jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
588 resolved_method->name(), | |
589 resolved_method->signature())); | |
590 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
591 } | |
592 } | |
593 | |
594 | |
595 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, symbolHandle method_name, | |
596 symbolHandle method_signature, KlassHandle current_klass, bool check_access, TRAPS) { | |
597 methodHandle resolved_method; | |
598 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
599 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); | |
600 } | |
601 | |
602 // throws linktime exceptions | |
603 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
604 symbolHandle method_name, symbolHandle method_signature, | |
605 KlassHandle current_klass, bool check_access, TRAPS) { | |
606 | |
607 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
608 | |
609 // check if method name is <init>, that it is found in same klass as static type | |
610 if (resolved_method->name() == vmSymbols::object_initializer_name() && | |
611 resolved_method->method_holder() != resolved_klass()) { | |
612 ResourceMark rm(THREAD); | |
613 Exceptions::fthrow( | |
614 THREAD_AND_LOCATION, | |
615 vmSymbolHandles::java_lang_NoSuchMethodError(), | |
616 "%s: method %s%s not found", | |
617 resolved_klass->external_name(), | |
618 resolved_method->name()->as_C_string(), | |
619 resolved_method->signature()->as_C_string() | |
620 ); | |
621 return; | |
622 } | |
623 | |
624 // check if not static | |
625 if (resolved_method->is_static()) { | |
626 char buf[200]; | |
627 jio_snprintf(buf, sizeof(buf), | |
628 "Expecting non-static method %s", | |
629 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
630 resolved_method->name(), | |
631 resolved_method->signature())); | |
632 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
633 } | |
634 } | |
635 | |
636 // throws runtime exceptions | |
637 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
638 KlassHandle current_klass, bool check_access, TRAPS) { | |
639 | |
640 // resolved method is selected method unless we have an old-style lookup | |
641 methodHandle sel_method(THREAD, resolved_method()); | |
642 | |
643 // check if this is an old-style super call and do a new lookup if so | |
644 { KlassHandle method_klass = KlassHandle(THREAD, | |
645 resolved_method->method_holder()); | |
646 | |
647 if (check_access && | |
648 // a) check if ACC_SUPER flag is set for the current class | |
649 current_klass->is_super() && | |
650 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!) | |
651 current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() && | |
652 // c) check if the method is not <init> | |
653 resolved_method->name() != vmSymbols::object_initializer_name()) { | |
654 // Lookup super method | |
655 KlassHandle super_klass(THREAD, current_klass->super()); | |
656 lookup_instance_method_in_klasses(sel_method, super_klass, | |
657 symbolHandle(THREAD, resolved_method->name()), | |
658 symbolHandle(THREAD, resolved_method->signature()), CHECK); | |
659 // check if found | |
660 if (sel_method.is_null()) { | |
661 ResourceMark rm(THREAD); | |
662 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
663 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
664 resolved_method->name(), | |
665 resolved_method->signature())); | |
666 } | |
667 } | |
668 } | |
669 | |
670 // check if not static | |
671 if (sel_method->is_static()) { | |
672 char buf[200]; | |
673 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
674 resolved_method->name(), | |
675 resolved_method->signature())); | |
676 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
677 } | |
678 | |
679 // check if abstract | |
680 if (sel_method->is_abstract()) { | |
681 ResourceMark rm(THREAD); | |
682 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
683 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
684 sel_method->name(), | |
685 sel_method->signature())); | |
686 } | |
687 | |
688 // setup result | |
689 result.set_static(resolved_klass, sel_method, CHECK); | |
690 } | |
691 | |
692 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, | |
693 symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, | |
694 bool check_access, bool check_null_and_abstract, TRAPS) { | |
695 methodHandle resolved_method; | |
696 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
697 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); | |
698 } | |
699 | |
700 // throws linktime exceptions | |
701 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, | |
702 symbolHandle method_name, symbolHandle method_signature, | |
703 KlassHandle current_klass, bool check_access, TRAPS) { | |
704 // normal method resolution | |
705 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
706 | |
707 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
708 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
709 | |
710 // check if not static | |
711 if (resolved_method->is_static()) { | |
712 char buf[200]; | |
713 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
714 resolved_method->name(), | |
715 resolved_method->signature())); | |
716 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
717 } | |
718 } | |
719 | |
720 // throws runtime exceptions | |
721 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, | |
722 methodHandle resolved_method, | |
723 KlassHandle resolved_klass, | |
724 Handle recv, | |
725 KlassHandle recv_klass, | |
726 bool check_null_and_abstract, | |
727 TRAPS) { | |
728 | |
729 // setup default return values | |
730 int vtable_index = methodOopDesc::invalid_vtable_index; | |
731 methodHandle selected_method; | |
732 | |
733 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); | |
734 | |
735 // runtime method resolution | |
736 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists | |
737 THROW(vmSymbols::java_lang_NullPointerException()); | |
738 } | |
739 | |
740 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's | |
741 // has not been rewritten, and the vtable initialized. | |
742 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); | |
743 | |
744 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's | |
745 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since | |
746 // a missing receiver might result in a bogus lookup. | |
747 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); | |
748 | |
749 // do lookup based on receiver klass using the vtable index | |
750 if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method | |
751 vtable_index = vtable_index_of_miranda_method(resolved_klass, | |
752 symbolHandle(THREAD, resolved_method->name()), | |
753 symbolHandle(THREAD, resolved_method->signature()), CHECK); | |
754 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); | |
755 | |
756 instanceKlass* inst = instanceKlass::cast(recv_klass()); | |
757 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); | |
758 } else { | |
759 // at this point we are sure that resolved_method is virtual and not | |
760 // a miranda method; therefore, it must have a valid vtable index. | |
761 vtable_index = resolved_method->vtable_index(); | |
762 // We could get a negative vtable_index for final methods, | |
763 // because as an optimization they are they are never put in the vtable, | |
764 // unless they override an existing method. | |
765 // If we do get a negative, it means the resolved method is the the selected | |
766 // method, and it can never be changed by an override. | |
767 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) { | |
768 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); | |
769 selected_method = resolved_method; | |
770 } else { | |
771 // recv_klass might be an arrayKlassOop but all vtables start at | |
772 // the same place. The cast is to avoid virtual call and assertion. | |
773 instanceKlass* inst = (instanceKlass*)recv_klass()->klass_part(); | |
774 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); | |
775 } | |
776 } | |
777 | |
778 // check if method exists | |
779 if (selected_method.is_null()) { | |
780 ResourceMark rm(THREAD); | |
781 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
782 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
783 resolved_method->name(), | |
784 resolved_method->signature())); | |
785 } | |
786 | |
787 // check if abstract | |
788 if (check_null_and_abstract && selected_method->is_abstract()) { | |
789 ResourceMark rm(THREAD); | |
790 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
791 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
792 selected_method->name(), | |
793 selected_method->signature())); | |
794 } | |
795 | |
796 // setup result | |
797 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); | |
798 } | |
799 | |
800 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, | |
801 symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, | |
802 bool check_access, bool check_null_and_abstract, TRAPS) { | |
803 methodHandle resolved_method; | |
804 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
805 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); | |
806 } | |
807 | |
808 // throws linktime exceptions | |
809 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, symbolHandle method_name, | |
810 symbolHandle method_signature, KlassHandle current_klass, bool check_access, TRAPS) { | |
811 // normal interface method resolution | |
812 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
813 | |
814 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
815 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
816 } | |
817 | |
818 // throws runtime exceptions | |
819 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
820 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { | |
821 // check if receiver exists | |
822 if (check_null_and_abstract && recv.is_null()) { | |
823 THROW(vmSymbols::java_lang_NullPointerException()); | |
824 } | |
825 | |
826 // check if receiver klass implements the resolved interface | |
827 if (!recv_klass->is_subtype_of(resolved_klass())) { | |
828 char buf[200]; | |
829 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", | |
830 (Klass::cast(recv_klass()))->external_name(), | |
831 (Klass::cast(resolved_klass()))->external_name()); | |
832 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
833 } | |
834 // do lookup based on receiver klass | |
835 methodHandle sel_method; | |
836 lookup_instance_method_in_klasses(sel_method, recv_klass, | |
837 symbolHandle(THREAD, resolved_method->name()), | |
838 symbolHandle(THREAD, resolved_method->signature()), CHECK); | |
839 // check if method exists | |
840 if (sel_method.is_null()) { | |
841 ResourceMark rm(THREAD); | |
842 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
843 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), | |
844 resolved_method->name(), | |
845 resolved_method->signature())); | |
846 } | |
847 // check if public | |
848 if (!sel_method->is_public()) { | |
849 ResourceMark rm(THREAD); | |
850 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), | |
851 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), | |
852 sel_method->name(), | |
853 sel_method->signature())); | |
854 } | |
855 // check if abstract | |
856 if (check_null_and_abstract && sel_method->is_abstract()) { | |
857 ResourceMark rm(THREAD); | |
858 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
859 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), | |
860 sel_method->name(), | |
861 sel_method->signature())); | |
862 } | |
863 // setup result | |
864 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK); | |
865 } | |
866 | |
867 | |
868 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( | |
869 KlassHandle resolved_klass, | |
870 symbolHandle method_name, | |
871 symbolHandle method_signature, | |
872 KlassHandle current_klass, | |
873 bool check_access) { | |
874 EXCEPTION_MARK; | |
875 methodHandle method_result; | |
876 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
877 if (HAS_PENDING_EXCEPTION) { | |
878 CLEAR_PENDING_EXCEPTION; | |
879 return methodHandle(); | |
880 } else { | |
881 return method_result; | |
882 } | |
883 } | |
884 | |
885 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( | |
886 KlassHandle resolved_klass, | |
887 symbolHandle method_name, | |
888 symbolHandle method_signature, | |
889 KlassHandle current_klass, | |
890 bool check_access) { | |
891 EXCEPTION_MARK; | |
892 methodHandle method_result; | |
893 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
894 if (HAS_PENDING_EXCEPTION) { | |
895 CLEAR_PENDING_EXCEPTION; | |
896 return methodHandle(); | |
897 } else { | |
898 return method_result; | |
899 } | |
900 } | |
901 | |
902 methodHandle LinkResolver::resolve_virtual_call_or_null( | |
903 KlassHandle receiver_klass, | |
904 KlassHandle resolved_klass, | |
905 symbolHandle name, | |
906 symbolHandle signature, | |
907 KlassHandle current_klass) { | |
908 EXCEPTION_MARK; | |
909 CallInfo info; | |
910 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
911 if (HAS_PENDING_EXCEPTION) { | |
912 CLEAR_PENDING_EXCEPTION; | |
913 return methodHandle(); | |
914 } | |
915 return info.selected_method(); | |
916 } | |
917 | |
918 methodHandle LinkResolver::resolve_interface_call_or_null( | |
919 KlassHandle receiver_klass, | |
920 KlassHandle resolved_klass, | |
921 symbolHandle name, | |
922 symbolHandle signature, | |
923 KlassHandle current_klass) { | |
924 EXCEPTION_MARK; | |
925 CallInfo info; | |
926 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
927 if (HAS_PENDING_EXCEPTION) { | |
928 CLEAR_PENDING_EXCEPTION; | |
929 return methodHandle(); | |
930 } | |
931 return info.selected_method(); | |
932 } | |
933 | |
934 int LinkResolver::resolve_virtual_vtable_index( | |
935 KlassHandle receiver_klass, | |
936 KlassHandle resolved_klass, | |
937 symbolHandle name, | |
938 symbolHandle signature, | |
939 KlassHandle current_klass) { | |
940 EXCEPTION_MARK; | |
941 CallInfo info; | |
942 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
943 if (HAS_PENDING_EXCEPTION) { | |
944 CLEAR_PENDING_EXCEPTION; | |
945 return methodOopDesc::invalid_vtable_index; | |
946 } | |
947 return info.vtable_index(); | |
948 } | |
949 | |
950 methodHandle LinkResolver::resolve_static_call_or_null( | |
951 KlassHandle resolved_klass, | |
952 symbolHandle name, | |
953 symbolHandle signature, | |
954 KlassHandle current_klass) { | |
955 EXCEPTION_MARK; | |
956 CallInfo info; | |
957 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
958 if (HAS_PENDING_EXCEPTION) { | |
959 CLEAR_PENDING_EXCEPTION; | |
960 return methodHandle(); | |
961 } | |
962 return info.selected_method(); | |
963 } | |
964 | |
965 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, symbolHandle name, symbolHandle signature, | |
966 KlassHandle current_klass) { | |
967 EXCEPTION_MARK; | |
968 CallInfo info; | |
969 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); | |
970 if (HAS_PENDING_EXCEPTION) { | |
971 CLEAR_PENDING_EXCEPTION; | |
972 return methodHandle(); | |
973 } | |
974 return info.selected_method(); | |
975 } | |
976 | |
977 | |
978 | |
979 //------------------------------------------------------------------------------------------------------------------------ | |
980 // ConstantPool entries | |
981 | |
982 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { | |
983 switch (byte) { | |
984 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; | |
985 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; | |
986 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; | |
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987 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; |
0 | 988 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; |
989 } | |
990 return; | |
991 } | |
992 | |
993 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, symbolHandle& method_name, symbolHandle& method_signature, | |
994 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { | |
995 // resolve klass | |
996 resolve_klass(resolved_klass, pool, index, CHECK); | |
997 | |
998 // Get name, signature, and static klass | |
999 method_name = symbolHandle(THREAD, pool->name_ref_at(index)); | |
1000 method_signature = symbolHandle(THREAD, pool->signature_ref_at(index)); | |
1001 current_klass = KlassHandle(THREAD, pool->pool_holder()); | |
1002 } | |
1003 | |
1004 | |
1005 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
1006 KlassHandle resolved_klass; | |
1007 symbolHandle method_name; | |
1008 symbolHandle method_signature; | |
1009 KlassHandle current_klass; | |
1010 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1011 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
1012 } | |
1013 | |
1014 | |
1015 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
1016 KlassHandle resolved_klass; | |
1017 symbolHandle method_name; | |
1018 symbolHandle method_signature; | |
1019 KlassHandle current_klass; | |
1020 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1021 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
1022 } | |
1023 | |
1024 | |
1025 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, | |
1026 constantPoolHandle pool, int index, | |
1027 TRAPS) { | |
1028 | |
1029 KlassHandle resolved_klass; | |
1030 symbolHandle method_name; | |
1031 symbolHandle method_signature; | |
1032 KlassHandle current_klass; | |
1033 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1034 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); | |
1035 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
1036 } | |
1037 | |
1038 | |
1039 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { | |
1040 KlassHandle resolved_klass; | |
1041 symbolHandle method_name; | |
1042 symbolHandle method_signature; | |
1043 KlassHandle current_klass; | |
1044 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1045 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); | |
1046 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
1047 } | |
1048 | |
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1049 |
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1050 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int raw_index, TRAPS) { |
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1051 assert(EnableInvokeDynamic, ""); |
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1052 |
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1053 // This guy is reached from InterpreterRuntime::resolve_invokedynamic. |
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1054 |
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1055 // At this point, we only need the signature, and can ignore the name. |
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1056 symbolHandle method_signature(THREAD, pool->signature_ref_at(raw_index)); // raw_index works directly |
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1057 symbolHandle method_name = vmSymbolHandles::invokeExact_name(); |
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1058 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); |
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1059 |
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1060 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) |
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1061 // The extra MH receiver will be inserted into the stack on every call. |
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1062 methodHandle resolved_method; |
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1063 KlassHandle current_klass(THREAD, pool->pool_holder()); |
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1064 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, CHECK); |
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1065 if (resolved_method.is_null()) { |
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1066 THROW(vmSymbols::java_lang_InternalError()); |
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1067 } |
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1068 result.set_virtual(resolved_klass, KlassHandle(), resolved_method, resolved_method, resolved_method->vtable_index(), CHECK); |
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1069 } |
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1070 |
0 | 1071 //------------------------------------------------------------------------------------------------------------------------ |
1072 #ifndef PRODUCT | |
1073 | |
1074 void FieldAccessInfo::print() { | |
1075 ResourceMark rm; | |
1076 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset()); | |
1077 } | |
1078 | |
1079 #endif |