Mercurial > hg > truffle
annotate src/share/vm/interpreter/linkResolver.cpp @ 3109:3664989976e2
Merge
author | Gilles Duboscq <gilles.duboscq@oracle.com> |
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date | Fri, 01 Jul 2011 12:57:10 +0200 |
parents | ed69575596ac |
children | acf5e660c71a |
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 (EnableInvokeDynamic && 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 (EnableInvokeDynamic && |
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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()) { |
2460 | 224 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(), |
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225 Handle(), |
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226 Handle(), |
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227 true, |
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228 CHECK); |
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229 } |
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230 } |
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231 methodOop result_oop = SystemDictionary::find_method_handle_invoke(name, |
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232 signature, |
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233 current_klass, |
710 | 234 CHECK); |
235 if (result_oop != NULL) { | |
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236 assert(result_oop->is_method_handle_invoke() && result_oop->signature() == signature, "consistent"); |
710 | 237 result = methodHandle(THREAD, result_oop); |
238 } | |
239 } | |
240 } | |
241 | |
0 | 242 void LinkResolver::check_method_accessability(KlassHandle ref_klass, |
243 KlassHandle resolved_klass, | |
244 KlassHandle sel_klass, | |
245 methodHandle sel_method, | |
246 TRAPS) { | |
247 | |
248 AccessFlags flags = sel_method->access_flags(); | |
249 | |
250 // Special case: arrays always override "clone". JVMS 2.15. | |
251 // If the resolved klass is an array class, and the declaring class | |
252 // is java.lang.Object and the method is "clone", set the flags | |
253 // to public. | |
254 // | |
255 // We'll check for the method name first, as that's most likely | |
256 // to be false (so we'll short-circuit out of these tests). | |
257 if (sel_method->name() == vmSymbols::clone_name() && | |
1142 | 258 sel_klass() == SystemDictionary::Object_klass() && |
0 | 259 resolved_klass->oop_is_array()) { |
260 // We need to change "protected" to "public". | |
261 assert(flags.is_protected(), "clone not protected?"); | |
262 jint new_flags = flags.as_int(); | |
263 new_flags = new_flags & (~JVM_ACC_PROTECTED); | |
264 new_flags = new_flags | JVM_ACC_PUBLIC; | |
265 flags.set_flags(new_flags); | |
266 } | |
267 | |
268 if (!Reflection::verify_field_access(ref_klass->as_klassOop(), | |
269 resolved_klass->as_klassOop(), | |
270 sel_klass->as_klassOop(), | |
271 flags, | |
272 true)) { | |
273 ResourceMark rm(THREAD); | |
274 Exceptions::fthrow( | |
275 THREAD_AND_LOCATION, | |
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276 vmSymbols::java_lang_IllegalAccessError(), |
0 | 277 "tried to access method %s.%s%s from class %s", |
278 sel_klass->external_name(), | |
279 sel_method->name()->as_C_string(), | |
280 sel_method->signature()->as_C_string(), | |
281 ref_klass->external_name() | |
282 ); | |
283 return; | |
284 } | |
285 } | |
286 | |
287 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle& resolved_klass, | |
288 constantPoolHandle pool, int index, TRAPS) { | |
289 | |
290 // resolve klass | |
291 resolve_klass(resolved_klass, pool, index, CHECK); | |
292 | |
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293 Symbol* method_name = pool->name_ref_at(index); |
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294 Symbol* method_signature = pool->signature_ref_at(index); |
0 | 295 KlassHandle current_klass(THREAD, pool->pool_holder()); |
296 | |
297 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
298 } | |
299 | |
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300 void LinkResolver::resolve_dynamic_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) { |
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301 // The class is java.lang.invoke.MethodHandle |
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302 resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); |
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303 |
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304 Symbol* method_name = vmSymbols::invokeExact_name(); |
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305 |
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306 Symbol* method_signature = pool->signature_ref_at(index); |
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307 KlassHandle current_klass (THREAD, pool->pool_holder()); |
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308 |
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309 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); |
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310 } |
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311 |
0 | 312 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) { |
313 | |
314 // resolve klass | |
315 resolve_klass(resolved_klass, pool, index, CHECK); | |
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316 Symbol* method_name = pool->name_ref_at(index); |
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317 Symbol* method_signature = pool->signature_ref_at(index); |
0 | 318 KlassHandle current_klass(THREAD, pool->pool_holder()); |
319 | |
320 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
321 } | |
322 | |
323 | |
324 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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325 Symbol* method_name, Symbol* method_signature, |
0 | 326 KlassHandle current_klass, bool check_access, TRAPS) { |
327 | |
328 // 1. check if klass is not interface | |
329 if (resolved_klass->is_interface()) { | |
330 char buf[200]; | |
331 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name()); | |
332 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
333 } | |
334 | |
335 // 2. lookup method in resolved klass and its super klasses | |
336 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
337 | |
338 if (resolved_method.is_null()) { // not found in the class hierarchy | |
339 // 3. lookup method in all the interfaces implemented by the resolved klass | |
340 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
341 | |
342 if (resolved_method.is_null()) { | |
710 | 343 // JSR 292: see if this is an implicitly generated method MethodHandle.invoke(*...) |
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344 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, CHECK); |
710 | 345 } |
346 | |
347 if (resolved_method.is_null()) { | |
0 | 348 // 4. method lookup failed |
349 ResourceMark rm(THREAD); | |
350 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), | |
351 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
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352 method_name, |
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353 method_signature)); |
0 | 354 } |
355 } | |
356 | |
357 // 5. check if method is concrete | |
358 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { | |
359 ResourceMark rm(THREAD); | |
360 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
361 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
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362 method_name, |
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363 method_signature)); |
0 | 364 } |
365 | |
366 // 6. access checks, access checking may be turned off when calling from within the VM. | |
367 if (check_access) { | |
368 assert(current_klass.not_null() , "current_klass should not be null"); | |
369 | |
370 // check if method can be accessed by the referring class | |
371 check_method_accessability(current_klass, | |
372 resolved_klass, | |
373 KlassHandle(THREAD, resolved_method->method_holder()), | |
374 resolved_method, | |
375 CHECK); | |
376 | |
377 // check loader constraints | |
378 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); | |
379 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); | |
380 { | |
381 ResourceMark rm(THREAD); | |
382 char* failed_type_name = | |
383 SystemDictionary::check_signature_loaders(method_signature, loader, | |
384 class_loader, true, CHECK); | |
385 if (failed_type_name != NULL) { | |
386 const char* msg = "loader constraint violation: when resolving method" | |
387 " \"%s\" the class loader (instance of %s) of the current class, %s," | |
388 " and the class loader (instance of %s) for resolved class, %s, have" | |
389 " different Class objects for the type %s used in the signature"; | |
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390 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); |
0 | 391 const char* loader1 = SystemDictionary::loader_name(loader()); |
392 char* current = instanceKlass::cast(current_klass())->name()->as_C_string(); | |
393 const char* loader2 = SystemDictionary::loader_name(class_loader()); | |
394 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); | |
395 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + | |
396 strlen(current) + strlen(loader2) + strlen(resolved) + | |
397 strlen(failed_type_name); | |
398 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
399 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
400 resolved, failed_type_name); | |
401 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
402 } | |
403 } | |
404 } | |
405 } | |
406 | |
407 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, | |
408 KlassHandle resolved_klass, | |
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409 Symbol* method_name, |
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410 Symbol* method_signature, |
0 | 411 KlassHandle current_klass, |
412 bool check_access, TRAPS) { | |
413 | |
414 // check if klass is interface | |
415 if (!resolved_klass->is_interface()) { | |
416 char buf[200]; | |
417 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name()); | |
418 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
419 } | |
420 | |
421 // lookup method in this interface or its super, java.lang.Object | |
422 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
423 | |
424 if (resolved_method.is_null()) { | |
425 // lookup method in all the super-interfaces | |
426 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); | |
427 if (resolved_method.is_null()) { | |
428 // no method found | |
429 ResourceMark rm(THREAD); | |
430 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), | |
431 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
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432 method_name, |
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433 method_signature)); |
0 | 434 } |
435 } | |
436 | |
437 if (check_access) { | |
438 HandleMark hm(THREAD); | |
439 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); | |
440 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); | |
441 { | |
442 ResourceMark rm(THREAD); | |
443 char* failed_type_name = | |
444 SystemDictionary::check_signature_loaders(method_signature, loader, | |
445 class_loader, true, CHECK); | |
446 if (failed_type_name != NULL) { | |
447 const char* msg = "loader constraint violation: when resolving " | |
448 "interface method \"%s\" the class loader (instance of %s) of the " | |
449 "current class, %s, and the class loader (instance of %s) for " | |
450 "resolved class, %s, have different Class objects for the type %s " | |
451 "used in the signature"; | |
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452 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); |
0 | 453 const char* loader1 = SystemDictionary::loader_name(loader()); |
454 char* current = instanceKlass::cast(current_klass())->name()->as_C_string(); | |
455 const char* loader2 = SystemDictionary::loader_name(class_loader()); | |
456 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); | |
457 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + | |
458 strlen(current) + strlen(loader2) + strlen(resolved) + | |
459 strlen(failed_type_name); | |
460 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
461 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | |
462 resolved, failed_type_name); | |
463 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
464 } | |
465 } | |
466 } | |
467 } | |
468 | |
469 //------------------------------------------------------------------------------------------------------------------------ | |
470 // Field resolution | |
471 | |
472 void LinkResolver::check_field_accessability(KlassHandle ref_klass, | |
473 KlassHandle resolved_klass, | |
474 KlassHandle sel_klass, | |
475 fieldDescriptor& fd, | |
476 TRAPS) { | |
477 if (!Reflection::verify_field_access(ref_klass->as_klassOop(), | |
478 resolved_klass->as_klassOop(), | |
479 sel_klass->as_klassOop(), | |
480 fd.access_flags(), | |
481 true)) { | |
482 ResourceMark rm(THREAD); | |
483 Exceptions::fthrow( | |
484 THREAD_AND_LOCATION, | |
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485 vmSymbols::java_lang_IllegalAccessError(), |
0 | 486 "tried to access field %s.%s from class %s", |
487 sel_klass->external_name(), | |
488 fd.name()->as_C_string(), | |
489 ref_klass->external_name() | |
490 ); | |
491 return; | |
492 } | |
493 } | |
494 | |
495 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) { | |
496 resolve_field(result, pool, index, byte, check_only, true, CHECK); | |
497 } | |
498 | |
499 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) { | |
500 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || | |
501 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode"); | |
502 | |
503 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); | |
504 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); | |
505 | |
506 // resolve specified klass | |
507 KlassHandle resolved_klass; | |
508 if (update_pool) { | |
509 resolve_klass(resolved_klass, pool, index, CHECK); | |
510 } else { | |
511 resolve_klass_no_update(resolved_klass, pool, index, CHECK); | |
512 } | |
513 // Load these early in case the resolve of the containing klass fails | |
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514 Symbol* field = pool->name_ref_at(index); |
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515 Symbol* sig = pool->signature_ref_at(index); |
0 | 516 // Check if there's a resolved klass containing the field |
517 if( resolved_klass.is_null() ) { | |
518 ResourceMark rm(THREAD); | |
519 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
520 } | |
521 | |
522 // Resolve instance field | |
523 fieldDescriptor fd; // find_field initializes fd if found | |
524 KlassHandle sel_klass(THREAD, instanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); | |
525 // check if field exists; i.e., if a klass containing the field def has been selected | |
526 if (sel_klass.is_null()){ | |
527 ResourceMark rm(THREAD); | |
528 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); | |
529 } | |
530 | |
531 // check access | |
532 KlassHandle ref_klass(THREAD, pool->pool_holder()); | |
533 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK); | |
534 | |
535 // check for errors | |
536 if (is_static != fd.is_static()) { | |
537 char msg[200]; | |
538 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()); | |
539 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); | |
540 } | |
541 | |
542 // Final fields can only be accessed from its own class. | |
543 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) { | |
544 THROW(vmSymbols::java_lang_IllegalAccessError()); | |
545 } | |
546 | |
547 // initialize resolved_klass if necessary | |
548 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) | |
549 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) | |
550 // | |
551 // note 2: we don't want to force initialization if we are just checking | |
552 // if the field access is legal; e.g., during compilation | |
553 if (is_static && !check_only) { | |
554 sel_klass->initialize(CHECK); | |
555 } | |
556 | |
557 { | |
558 HandleMark hm(THREAD); | |
559 Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader()); | |
560 Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader()); | |
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561 Symbol* signature_ref = pool->signature_ref_at(index); |
0 | 562 { |
563 ResourceMark rm(THREAD); | |
564 char* failed_type_name = | |
565 SystemDictionary::check_signature_loaders(signature_ref, | |
566 ref_loader, sel_loader, | |
567 false, | |
568 CHECK); | |
569 if (failed_type_name != NULL) { | |
570 const char* msg = "loader constraint violation: when resolving field" | |
571 " \"%s\" the class loader (instance of %s) of the referring class, " | |
572 "%s, and the class loader (instance of %s) for the field's resolved " | |
573 "type, %s, have different Class objects for that type"; | |
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574 char* field_name = field->as_C_string(); |
0 | 575 const char* loader1 = SystemDictionary::loader_name(ref_loader()); |
576 char* sel = instanceKlass::cast(sel_klass())->name()->as_C_string(); | |
577 const char* loader2 = SystemDictionary::loader_name(sel_loader()); | |
578 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + | |
579 strlen(sel) + strlen(loader2) + strlen(failed_type_name); | |
580 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | |
581 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, | |
582 failed_type_name); | |
583 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); | |
584 } | |
585 } | |
586 } | |
587 | |
588 // return information. note that the klass is set to the actual klass containing the | |
589 // field, otherwise access of static fields in superclasses will not work. | |
590 KlassHandle holder (THREAD, fd.field_holder()); | |
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591 Symbol* name = fd.name(); |
0 | 592 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags()); |
593 } | |
594 | |
595 | |
596 //------------------------------------------------------------------------------------------------------------------------ | |
597 // Invoke resolution | |
598 // | |
599 // Naming conventions: | |
600 // | |
601 // resolved_method the specified method (i.e., static receiver specified via constant pool index) | |
602 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) | |
603 // resolved_klass the specified klass (i.e., specified via constant pool index) | |
604 // recv_klass the receiver klass | |
605 | |
606 | |
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607 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, |
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608 Symbol* method_signature, KlassHandle current_klass, |
0 | 609 bool check_access, bool initialize_class, TRAPS) { |
610 methodHandle resolved_method; | |
611 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
612 resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder())); | |
613 | |
614 // Initialize klass (this should only happen if everything is ok) | |
615 if (initialize_class && resolved_klass->should_be_initialized()) { | |
616 resolved_klass->initialize(CHECK); | |
617 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
618 } | |
619 | |
620 // setup result | |
621 result.set_static(resolved_klass, resolved_method, CHECK); | |
622 } | |
623 | |
624 // throws linktime exceptions | |
625 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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626 Symbol* method_name, Symbol* method_signature, |
0 | 627 KlassHandle current_klass, bool check_access, TRAPS) { |
628 | |
629 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
630 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); | |
631 | |
632 // check if static | |
633 if (!resolved_method->is_static()) { | |
634 char buf[200]; | |
635 jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
636 resolved_method->name(), | |
637 resolved_method->signature())); | |
638 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
639 } | |
640 } | |
641 | |
642 | |
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643 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, |
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644 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
0 | 645 methodHandle resolved_method; |
646 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
647 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); | |
648 } | |
649 | |
650 // throws linktime exceptions | |
651 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, | |
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652 Symbol* method_name, Symbol* method_signature, |
0 | 653 KlassHandle current_klass, bool check_access, TRAPS) { |
654 | |
655 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
656 | |
657 // check if method name is <init>, that it is found in same klass as static type | |
658 if (resolved_method->name() == vmSymbols::object_initializer_name() && | |
659 resolved_method->method_holder() != resolved_klass()) { | |
660 ResourceMark rm(THREAD); | |
661 Exceptions::fthrow( | |
662 THREAD_AND_LOCATION, | |
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663 vmSymbols::java_lang_NoSuchMethodError(), |
0 | 664 "%s: method %s%s not found", |
665 resolved_klass->external_name(), | |
666 resolved_method->name()->as_C_string(), | |
667 resolved_method->signature()->as_C_string() | |
668 ); | |
669 return; | |
670 } | |
671 | |
672 // check if not static | |
673 if (resolved_method->is_static()) { | |
674 char buf[200]; | |
675 jio_snprintf(buf, sizeof(buf), | |
676 "Expecting non-static method %s", | |
677 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
678 resolved_method->name(), | |
679 resolved_method->signature())); | |
680 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
681 } | |
682 } | |
683 | |
684 // throws runtime exceptions | |
685 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
686 KlassHandle current_klass, bool check_access, TRAPS) { | |
687 | |
688 // resolved method is selected method unless we have an old-style lookup | |
689 methodHandle sel_method(THREAD, resolved_method()); | |
690 | |
691 // check if this is an old-style super call and do a new lookup if so | |
692 { KlassHandle method_klass = KlassHandle(THREAD, | |
693 resolved_method->method_holder()); | |
694 | |
695 if (check_access && | |
696 // a) check if ACC_SUPER flag is set for the current class | |
697 current_klass->is_super() && | |
698 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!) | |
699 current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() && | |
700 // c) check if the method is not <init> | |
701 resolved_method->name() != vmSymbols::object_initializer_name()) { | |
702 // Lookup super method | |
703 KlassHandle super_klass(THREAD, current_klass->super()); | |
704 lookup_instance_method_in_klasses(sel_method, super_klass, | |
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705 resolved_method->name(), |
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706 resolved_method->signature(), CHECK); |
0 | 707 // check if found |
708 if (sel_method.is_null()) { | |
709 ResourceMark rm(THREAD); | |
710 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
711 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
712 resolved_method->name(), | |
713 resolved_method->signature())); | |
714 } | |
715 } | |
716 } | |
717 | |
718 // check if not static | |
719 if (sel_method->is_static()) { | |
720 char buf[200]; | |
721 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
722 resolved_method->name(), | |
723 resolved_method->signature())); | |
724 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
725 } | |
726 | |
727 // check if abstract | |
728 if (sel_method->is_abstract()) { | |
729 ResourceMark rm(THREAD); | |
730 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
731 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
732 sel_method->name(), | |
733 sel_method->signature())); | |
734 } | |
735 | |
736 // setup result | |
737 result.set_static(resolved_klass, sel_method, CHECK); | |
738 } | |
739 | |
740 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, | |
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741 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
0 | 742 bool check_access, bool check_null_and_abstract, TRAPS) { |
743 methodHandle resolved_method; | |
744 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
745 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); | |
746 } | |
747 | |
748 // throws linktime exceptions | |
749 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, | |
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750 Symbol* method_name, Symbol* method_signature, |
0 | 751 KlassHandle current_klass, bool check_access, TRAPS) { |
752 // normal method resolution | |
753 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
754 | |
755 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
756 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
757 | |
758 // check if not static | |
759 if (resolved_method->is_static()) { | |
760 char buf[200]; | |
761 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
762 resolved_method->name(), | |
763 resolved_method->signature())); | |
764 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
765 } | |
766 } | |
767 | |
768 // throws runtime exceptions | |
769 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, | |
770 methodHandle resolved_method, | |
771 KlassHandle resolved_klass, | |
772 Handle recv, | |
773 KlassHandle recv_klass, | |
774 bool check_null_and_abstract, | |
775 TRAPS) { | |
776 | |
777 // setup default return values | |
778 int vtable_index = methodOopDesc::invalid_vtable_index; | |
779 methodHandle selected_method; | |
780 | |
781 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); | |
782 | |
783 // runtime method resolution | |
784 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists | |
785 THROW(vmSymbols::java_lang_NullPointerException()); | |
786 } | |
787 | |
788 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's | |
789 // has not been rewritten, and the vtable initialized. | |
790 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); | |
791 | |
792 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's | |
793 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since | |
794 // a missing receiver might result in a bogus lookup. | |
795 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); | |
796 | |
797 // do lookup based on receiver klass using the vtable index | |
798 if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method | |
799 vtable_index = vtable_index_of_miranda_method(resolved_klass, | |
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800 resolved_method->name(), |
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801 resolved_method->signature(), CHECK); |
0 | 802 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); |
803 | |
804 instanceKlass* inst = instanceKlass::cast(recv_klass()); | |
805 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); | |
806 } else { | |
807 // at this point we are sure that resolved_method is virtual and not | |
808 // a miranda method; therefore, it must have a valid vtable index. | |
809 vtable_index = resolved_method->vtable_index(); | |
810 // We could get a negative vtable_index for final methods, | |
811 // because as an optimization they are they are never put in the vtable, | |
812 // unless they override an existing method. | |
813 // If we do get a negative, it means the resolved method is the the selected | |
814 // method, and it can never be changed by an override. | |
815 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) { | |
816 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); | |
817 selected_method = resolved_method; | |
818 } else { | |
819 // recv_klass might be an arrayKlassOop but all vtables start at | |
820 // the same place. The cast is to avoid virtual call and assertion. | |
821 instanceKlass* inst = (instanceKlass*)recv_klass()->klass_part(); | |
822 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); | |
823 } | |
824 } | |
825 | |
826 // check if method exists | |
827 if (selected_method.is_null()) { | |
828 ResourceMark rm(THREAD); | |
829 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
830 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
831 resolved_method->name(), | |
832 resolved_method->signature())); | |
833 } | |
834 | |
835 // check if abstract | |
836 if (check_null_and_abstract && selected_method->is_abstract()) { | |
837 ResourceMark rm(THREAD); | |
838 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
839 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), | |
840 selected_method->name(), | |
841 selected_method->signature())); | |
842 } | |
843 | |
844 // setup result | |
845 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); | |
846 } | |
847 | |
848 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, | |
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849 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, |
0 | 850 bool check_access, bool check_null_and_abstract, TRAPS) { |
851 methodHandle resolved_method; | |
852 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
853 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); | |
854 } | |
855 | |
856 // throws linktime exceptions | |
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857 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, |
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858 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { |
0 | 859 // normal interface method resolution |
860 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); | |
861 | |
862 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); | |
863 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); | |
864 } | |
865 | |
866 // throws runtime exceptions | |
867 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, | |
868 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { | |
869 // check if receiver exists | |
870 if (check_null_and_abstract && recv.is_null()) { | |
871 THROW(vmSymbols::java_lang_NullPointerException()); | |
872 } | |
873 | |
874 // check if receiver klass implements the resolved interface | |
875 if (!recv_klass->is_subtype_of(resolved_klass())) { | |
876 char buf[200]; | |
877 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", | |
878 (Klass::cast(recv_klass()))->external_name(), | |
879 (Klass::cast(resolved_klass()))->external_name()); | |
880 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); | |
881 } | |
882 // do lookup based on receiver klass | |
883 methodHandle sel_method; | |
884 lookup_instance_method_in_klasses(sel_method, recv_klass, | |
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885 resolved_method->name(), |
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886 resolved_method->signature(), CHECK); |
0 | 887 // check if method exists |
888 if (sel_method.is_null()) { | |
889 ResourceMark rm(THREAD); | |
890 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
891 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), | |
892 resolved_method->name(), | |
893 resolved_method->signature())); | |
894 } | |
895 // check if public | |
896 if (!sel_method->is_public()) { | |
897 ResourceMark rm(THREAD); | |
898 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), | |
899 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), | |
900 sel_method->name(), | |
901 sel_method->signature())); | |
902 } | |
903 // check if abstract | |
904 if (check_null_and_abstract && sel_method->is_abstract()) { | |
905 ResourceMark rm(THREAD); | |
906 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), | |
907 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), | |
908 sel_method->name(), | |
909 sel_method->signature())); | |
910 } | |
911 // setup result | |
912 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK); | |
913 } | |
914 | |
915 | |
916 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( | |
917 KlassHandle resolved_klass, | |
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918 Symbol* method_name, |
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919 Symbol* method_signature, |
0 | 920 KlassHandle current_klass, |
921 bool check_access) { | |
922 EXCEPTION_MARK; | |
923 methodHandle method_result; | |
924 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
925 if (HAS_PENDING_EXCEPTION) { | |
926 CLEAR_PENDING_EXCEPTION; | |
927 return methodHandle(); | |
928 } else { | |
929 return method_result; | |
930 } | |
931 } | |
932 | |
933 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( | |
934 KlassHandle resolved_klass, | |
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935 Symbol* method_name, |
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936 Symbol* method_signature, |
0 | 937 KlassHandle current_klass, |
938 bool check_access) { | |
939 EXCEPTION_MARK; | |
940 methodHandle method_result; | |
941 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); | |
942 if (HAS_PENDING_EXCEPTION) { | |
943 CLEAR_PENDING_EXCEPTION; | |
944 return methodHandle(); | |
945 } else { | |
946 return method_result; | |
947 } | |
948 } | |
949 | |
950 methodHandle LinkResolver::resolve_virtual_call_or_null( | |
951 KlassHandle receiver_klass, | |
952 KlassHandle resolved_klass, | |
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953 Symbol* name, |
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954 Symbol* signature, |
0 | 955 KlassHandle current_klass) { |
956 EXCEPTION_MARK; | |
957 CallInfo info; | |
958 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
959 if (HAS_PENDING_EXCEPTION) { | |
960 CLEAR_PENDING_EXCEPTION; | |
961 return methodHandle(); | |
962 } | |
963 return info.selected_method(); | |
964 } | |
965 | |
966 methodHandle LinkResolver::resolve_interface_call_or_null( | |
967 KlassHandle receiver_klass, | |
968 KlassHandle resolved_klass, | |
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969 Symbol* name, |
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970 Symbol* signature, |
0 | 971 KlassHandle current_klass) { |
972 EXCEPTION_MARK; | |
973 CallInfo info; | |
974 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
975 if (HAS_PENDING_EXCEPTION) { | |
976 CLEAR_PENDING_EXCEPTION; | |
977 return methodHandle(); | |
978 } | |
979 return info.selected_method(); | |
980 } | |
981 | |
982 int LinkResolver::resolve_virtual_vtable_index( | |
983 KlassHandle receiver_klass, | |
984 KlassHandle resolved_klass, | |
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985 Symbol* name, |
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986 Symbol* signature, |
0 | 987 KlassHandle current_klass) { |
988 EXCEPTION_MARK; | |
989 CallInfo info; | |
990 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
991 if (HAS_PENDING_EXCEPTION) { | |
992 CLEAR_PENDING_EXCEPTION; | |
993 return methodOopDesc::invalid_vtable_index; | |
994 } | |
995 return info.vtable_index(); | |
996 } | |
997 | |
998 methodHandle LinkResolver::resolve_static_call_or_null( | |
999 KlassHandle resolved_klass, | |
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1000 Symbol* name, |
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1001 Symbol* signature, |
0 | 1002 KlassHandle current_klass) { |
1003 EXCEPTION_MARK; | |
1004 CallInfo info; | |
1005 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); | |
1006 if (HAS_PENDING_EXCEPTION) { | |
1007 CLEAR_PENDING_EXCEPTION; | |
1008 return methodHandle(); | |
1009 } | |
1010 return info.selected_method(); | |
1011 } | |
1012 | |
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1013 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, |
0 | 1014 KlassHandle current_klass) { |
1015 EXCEPTION_MARK; | |
1016 CallInfo info; | |
1017 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); | |
1018 if (HAS_PENDING_EXCEPTION) { | |
1019 CLEAR_PENDING_EXCEPTION; | |
1020 return methodHandle(); | |
1021 } | |
1022 return info.selected_method(); | |
1023 } | |
1024 | |
1025 | |
1026 | |
1027 //------------------------------------------------------------------------------------------------------------------------ | |
1028 // ConstantPool entries | |
1029 | |
1030 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { | |
1031 switch (byte) { | |
1032 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; | |
1033 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; | |
1034 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; | |
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1035 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; |
0 | 1036 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; |
1037 } | |
1038 return; | |
1039 } | |
1040 | |
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1041 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, |
0 | 1042 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { |
1043 // resolve klass | |
1044 resolve_klass(resolved_klass, pool, index, CHECK); | |
1045 | |
1046 // Get name, signature, and static klass | |
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1047 method_name = pool->name_ref_at(index); |
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1048 method_signature = pool->signature_ref_at(index); |
0 | 1049 current_klass = KlassHandle(THREAD, pool->pool_holder()); |
1050 } | |
1051 | |
1052 | |
1053 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
1054 KlassHandle resolved_klass; | |
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1055 Symbol* method_name = NULL; |
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1056 Symbol* method_signature = NULL; |
0 | 1057 KlassHandle current_klass; |
1058 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1059 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
1060 } | |
1061 | |
1062 | |
1063 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { | |
1064 KlassHandle resolved_klass; | |
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1065 Symbol* method_name = NULL; |
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1066 Symbol* method_signature = NULL; |
0 | 1067 KlassHandle current_klass; |
1068 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1069 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); | |
1070 } | |
1071 | |
1072 | |
1073 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, | |
1074 constantPoolHandle pool, int index, | |
1075 TRAPS) { | |
1076 | |
1077 KlassHandle resolved_klass; | |
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1078 Symbol* method_name = NULL; |
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1079 Symbol* method_signature = NULL; |
0 | 1080 KlassHandle current_klass; |
1081 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1082 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); | |
1083 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
1084 } | |
1085 | |
1086 | |
1087 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { | |
1088 KlassHandle resolved_klass; | |
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1089 Symbol* method_name = NULL; |
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1090 Symbol* method_signature = NULL; |
0 | 1091 KlassHandle current_klass; |
1092 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); | |
1093 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); | |
1094 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); | |
1095 } | |
1096 | |
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1097 |
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1098 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int raw_index, TRAPS) { |
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1099 assert(EnableInvokeDynamic, ""); |
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1100 |
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1101 // This guy is reached from InterpreterRuntime::resolve_invokedynamic. |
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1102 |
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1103 // At this point, we only need the signature, and can ignore the name. |
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1104 Symbol* method_signature = pool->signature_ref_at(raw_index); // raw_index works directly |
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1105 Symbol* method_name = vmSymbols::invokeExact_name(); |
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1106 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); |
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1107 |
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1108 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) |
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1109 // The extra MH receiver will be inserted into the stack on every call. |
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1110 methodHandle resolved_method; |
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1111 KlassHandle current_klass(THREAD, pool->pool_holder()); |
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1112 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, CHECK); |
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1113 if (resolved_method.is_null()) { |
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1114 THROW(vmSymbols::java_lang_InternalError()); |
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1115 } |
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1116 result.set_dynamic(resolved_method, CHECK); |
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1117 } |
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1118 |
0 | 1119 //------------------------------------------------------------------------------------------------------------------------ |
1120 #ifndef PRODUCT | |
1121 | |
1122 void FieldAccessInfo::print() { | |
1123 ResourceMark rm; | |
1124 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset()); | |
1125 } | |
1126 | |
1127 #endif |