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src/share/vm/interpreter/linkResolver.cpp@f08d439fab8c
src/share/vm/interpreter/linkResolver.cpp
Sun, 25 Sep 2011 16:03:29 -0700
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- never
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- Sun, 25 Sep 2011 16:03:29 -0700
- changeset 3156
- f08d439fab8c
- parent 3035
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- child 3969
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7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
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
55 #ifdef TARGET_OS_FAMILY_bsd
56 # include "thread_bsd.inline.hpp"
57 #endif
59 //------------------------------------------------------------------------------------------------------------------------
60 // Implementation of FieldAccessInfo
62 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset,
63 BasicType field_type, AccessFlags access_flags) {
64 _klass = klass;
65 _name = name;
66 _field_index = field_index;
67 _field_offset = field_offset;
68 _field_type = field_type;
69 _access_flags = access_flags;
70 }
73 //------------------------------------------------------------------------------------------------------------------------
74 // Implementation of CallInfo
77 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
78 int vtable_index = methodOopDesc::nonvirtual_vtable_index;
79 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
80 }
83 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) {
84 // This is only called for interface methods. If the resolved_method
85 // comes from java/lang/Object, it can be the subject of a virtual call, so
86 // we should pick the vtable index from the resolved method.
87 // Other than that case, there is no valid vtable index to specify.
88 int vtable_index = methodOopDesc::invalid_vtable_index;
89 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) {
90 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check");
91 vtable_index = resolved_method->vtable_index();
92 }
93 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
94 }
96 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
97 assert(vtable_index >= 0 || vtable_index == methodOopDesc::nonvirtual_vtable_index, "valid index");
98 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
99 }
101 void CallInfo::set_dynamic(methodHandle resolved_method, TRAPS) {
102 assert(resolved_method->is_method_handle_invoke(), "");
103 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass();
104 assert(resolved_klass == resolved_method->method_holder(), "");
105 int vtable_index = methodOopDesc::nonvirtual_vtable_index;
106 assert(resolved_method->vtable_index() == vtable_index, "");
107 set_common(resolved_klass, KlassHandle(), resolved_method, resolved_method, vtable_index, CHECK);
108 }
110 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
111 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
112 _resolved_klass = resolved_klass;
113 _selected_klass = selected_klass;
114 _resolved_method = resolved_method;
115 _selected_method = selected_method;
116 _vtable_index = vtable_index;
117 if (CompilationPolicy::must_be_compiled(selected_method)) {
118 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
120 // Note: with several active threads, the must_be_compiled may be true
121 // while can_be_compiled is false; remove assert
122 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
123 if (THREAD->is_Compiler_thread()) {
124 // don't force compilation, resolve was on behalf of compiler
125 return;
126 }
127 if (instanceKlass::cast(selected_method->method_holder())->is_not_initialized()) {
128 // 'is_not_initialized' means not only '!is_initialized', but also that
129 // initialization has not been started yet ('!being_initialized')
130 // Do not force compilation of methods in uninitialized classes.
131 // Note that doing this would throw an assert later,
132 // in CompileBroker::compile_method.
133 // We sometimes use the link resolver to do reflective lookups
134 // even before classes are initialized.
135 return;
136 }
137 CompileBroker::compile_method(selected_method, InvocationEntryBci,
138 CompilationPolicy::policy()->initial_compile_level(),
139 methodHandle(), 0, "must_be_compiled", CHECK);
140 }
141 }
144 //------------------------------------------------------------------------------------------------------------------------
145 // Klass resolution
147 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
148 if (!Reflection::verify_class_access(ref_klass->as_klassOop(),
149 sel_klass->as_klassOop(),
150 true)) {
151 ResourceMark rm(THREAD);
152 Exceptions::fthrow(
153 THREAD_AND_LOCATION,
154 vmSymbols::java_lang_IllegalAccessError(),
155 "tried to access class %s from class %s",
156 sel_klass->external_name(),
157 ref_klass->external_name()
158 );
159 return;
160 }
161 }
163 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
164 klassOop result_oop = pool->klass_ref_at(index, CHECK);
165 result = KlassHandle(THREAD, result_oop);
166 }
168 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
169 klassOop result_oop =
170 constantPoolOopDesc::klass_ref_at_if_loaded_check(pool, index, CHECK);
171 result = KlassHandle(THREAD, result_oop);
172 }
175 //------------------------------------------------------------------------------------------------------------------------
176 // Method resolution
177 //
178 // According to JVM spec. $5.4.3c & $5.4.3d
180 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
181 methodOop result_oop = klass->uncached_lookup_method(name, signature);
182 if (EnableInvokeDynamic && result_oop != NULL) {
183 switch (result_oop->intrinsic_id()) {
184 case vmIntrinsics::_invokeExact:
185 case vmIntrinsics::_invokeGeneric:
186 case vmIntrinsics::_invokeDynamic:
187 // Do not link directly to these. The VM must produce a synthetic one using lookup_implicit_method.
188 return;
189 }
190 }
191 result = methodHandle(THREAD, result_oop);
192 }
194 // returns first instance method
195 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
196 methodOop result_oop = klass->uncached_lookup_method(name, signature);
197 result = methodHandle(THREAD, result_oop);
198 while (!result.is_null() && result->is_static()) {
199 klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super());
200 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature));
201 }
202 }
205 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
206 ResourceMark rm(THREAD);
207 klassVtable *vt = instanceKlass::cast(klass())->vtable();
208 return vt->index_of_miranda(name, signature);
209 }
211 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
212 instanceKlass *ik = instanceKlass::cast(klass());
213 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature));
214 }
216 void LinkResolver::lookup_implicit_method(methodHandle& result,
217 KlassHandle klass, Symbol* name, Symbol* signature,
218 KlassHandle current_klass,
219 TRAPS) {
220 if (EnableInvokeDynamic &&
221 klass() == SystemDictionary::MethodHandle_klass() &&
222 methodOopDesc::is_method_handle_invoke_name(name)) {
223 if (!THREAD->is_Compiler_thread() && !MethodHandles::enabled()) {
224 // Make sure the Java part of the runtime has been booted up.
225 klassOop natives = SystemDictionary::MethodHandleNatives_klass();
226 if (natives == NULL || instanceKlass::cast(natives)->is_not_initialized()) {
227 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
228 Handle(),
229 Handle(),
230 true,
231 CHECK);
232 }
233 }
234 methodOop result_oop = SystemDictionary::find_method_handle_invoke(name,
235 signature,
236 current_klass,
237 CHECK);
238 if (result_oop != NULL) {
239 assert(result_oop->is_method_handle_invoke() && result_oop->signature() == signature, "consistent");
240 result = methodHandle(THREAD, result_oop);
241 }
242 }
243 }
245 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
246 KlassHandle resolved_klass,
247 KlassHandle sel_klass,
248 methodHandle sel_method,
249 TRAPS) {
251 AccessFlags flags = sel_method->access_flags();
253 // Special case: arrays always override "clone". JVMS 2.15.
254 // If the resolved klass is an array class, and the declaring class
255 // is java.lang.Object and the method is "clone", set the flags
256 // to public.
257 //
258 // We'll check for the method name first, as that's most likely
259 // to be false (so we'll short-circuit out of these tests).
260 if (sel_method->name() == vmSymbols::clone_name() &&
261 sel_klass() == SystemDictionary::Object_klass() &&
262 resolved_klass->oop_is_array()) {
263 // We need to change "protected" to "public".
264 assert(flags.is_protected(), "clone not protected?");
265 jint new_flags = flags.as_int();
266 new_flags = new_flags & (~JVM_ACC_PROTECTED);
267 new_flags = new_flags | JVM_ACC_PUBLIC;
268 flags.set_flags(new_flags);
269 }
271 if (!Reflection::verify_field_access(ref_klass->as_klassOop(),
272 resolved_klass->as_klassOop(),
273 sel_klass->as_klassOop(),
274 flags,
275 true)) {
276 ResourceMark rm(THREAD);
277 Exceptions::fthrow(
278 THREAD_AND_LOCATION,
279 vmSymbols::java_lang_IllegalAccessError(),
280 "tried to access method %s.%s%s from class %s",
281 sel_klass->external_name(),
282 sel_method->name()->as_C_string(),
283 sel_method->signature()->as_C_string(),
284 ref_klass->external_name()
285 );
286 return;
287 }
288 }
290 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle& resolved_klass,
291 constantPoolHandle pool, int index, TRAPS) {
293 // resolve klass
294 resolve_klass(resolved_klass, pool, index, CHECK);
296 Symbol* method_name = pool->name_ref_at(index);
297 Symbol* method_signature = pool->signature_ref_at(index);
298 KlassHandle current_klass(THREAD, pool->pool_holder());
300 if (pool->has_preresolution()
301 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
302 methodOopDesc::is_method_handle_invoke_name(method_name))) {
303 methodOop result_oop = constantPoolOopDesc::method_at_if_loaded(pool, index);
304 if (result_oop != NULL) {
305 resolved_method = methodHandle(THREAD, result_oop);
306 return;
307 }
308 }
310 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
311 }
313 void LinkResolver::resolve_dynamic_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) {
314 // The class is java.lang.invoke.MethodHandle
315 resolved_klass = SystemDictionaryHandles::MethodHandle_klass();
317 Symbol* method_name = vmSymbols::invokeExact_name();
319 Symbol* method_signature = pool->signature_ref_at(index);
320 KlassHandle current_klass (THREAD, pool->pool_holder());
322 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
323 }
325 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) {
327 // resolve klass
328 resolve_klass(resolved_klass, pool, index, CHECK);
329 Symbol* method_name = pool->name_ref_at(index);
330 Symbol* method_signature = pool->signature_ref_at(index);
331 KlassHandle current_klass(THREAD, pool->pool_holder());
333 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
334 }
337 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
338 Symbol* method_name, Symbol* method_signature,
339 KlassHandle current_klass, bool check_access, TRAPS) {
341 // 1. check if klass is not interface
342 if (resolved_klass->is_interface()) {
343 ResourceMark rm(THREAD);
344 char buf[200];
345 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name());
346 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
347 }
349 // 2. lookup method in resolved klass and its super klasses
350 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
352 if (resolved_method.is_null()) { // not found in the class hierarchy
353 // 3. lookup method in all the interfaces implemented by the resolved klass
354 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
356 if (resolved_method.is_null()) {
357 // JSR 292: see if this is an implicitly generated method MethodHandle.invoke(*...)
358 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, CHECK);
359 }
361 if (resolved_method.is_null()) {
362 // 4. method lookup failed
363 ResourceMark rm(THREAD);
364 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
365 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
366 method_name,
367 method_signature));
368 }
369 }
371 // 5. check if method is concrete
372 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
373 ResourceMark rm(THREAD);
374 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
375 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
376 method_name,
377 method_signature));
378 }
380 // 6. access checks, access checking may be turned off when calling from within the VM.
381 if (check_access) {
382 assert(current_klass.not_null() , "current_klass should not be null");
384 // check if method can be accessed by the referring class
385 check_method_accessability(current_klass,
386 resolved_klass,
387 KlassHandle(THREAD, resolved_method->method_holder()),
388 resolved_method,
389 CHECK);
391 // check loader constraints
392 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader());
393 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader());
394 {
395 ResourceMark rm(THREAD);
396 char* failed_type_name =
397 SystemDictionary::check_signature_loaders(method_signature, loader,
398 class_loader, true, CHECK);
399 if (failed_type_name != NULL) {
400 const char* msg = "loader constraint violation: when resolving method"
401 " \"%s\" the class loader (instance of %s) of the current class, %s,"
402 " and the class loader (instance of %s) for resolved class, %s, have"
403 " different Class objects for the type %s used in the signature";
404 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature);
405 const char* loader1 = SystemDictionary::loader_name(loader());
406 char* current = instanceKlass::cast(current_klass())->name()->as_C_string();
407 const char* loader2 = SystemDictionary::loader_name(class_loader());
408 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string();
409 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
410 strlen(current) + strlen(loader2) + strlen(resolved) +
411 strlen(failed_type_name);
412 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
413 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
414 resolved, failed_type_name);
415 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
416 }
417 }
418 }
419 }
421 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
422 KlassHandle resolved_klass,
423 Symbol* method_name,
424 Symbol* method_signature,
425 KlassHandle current_klass,
426 bool check_access, TRAPS) {
428 // check if klass is interface
429 if (!resolved_klass->is_interface()) {
430 ResourceMark rm(THREAD);
431 char buf[200];
432 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name());
433 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
434 }
436 // lookup method in this interface or its super, java.lang.Object
437 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
439 if (resolved_method.is_null()) {
440 // lookup method in all the super-interfaces
441 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
442 if (resolved_method.is_null()) {
443 // no method found
444 ResourceMark rm(THREAD);
445 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
446 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
447 method_name,
448 method_signature));
449 }
450 }
452 if (check_access) {
453 HandleMark hm(THREAD);
454 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader());
455 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader());
456 {
457 ResourceMark rm(THREAD);
458 char* failed_type_name =
459 SystemDictionary::check_signature_loaders(method_signature, loader,
460 class_loader, true, CHECK);
461 if (failed_type_name != NULL) {
462 const char* msg = "loader constraint violation: when resolving "
463 "interface method \"%s\" the class loader (instance of %s) of the "
464 "current class, %s, and the class loader (instance of %s) for "
465 "resolved class, %s, have different Class objects for the type %s "
466 "used in the signature";
467 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature);
468 const char* loader1 = SystemDictionary::loader_name(loader());
469 char* current = instanceKlass::cast(current_klass())->name()->as_C_string();
470 const char* loader2 = SystemDictionary::loader_name(class_loader());
471 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string();
472 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
473 strlen(current) + strlen(loader2) + strlen(resolved) +
474 strlen(failed_type_name);
475 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
476 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
477 resolved, failed_type_name);
478 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
479 }
480 }
481 }
482 }
484 //------------------------------------------------------------------------------------------------------------------------
485 // Field resolution
487 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
488 KlassHandle resolved_klass,
489 KlassHandle sel_klass,
490 fieldDescriptor& fd,
491 TRAPS) {
492 if (!Reflection::verify_field_access(ref_klass->as_klassOop(),
493 resolved_klass->as_klassOop(),
494 sel_klass->as_klassOop(),
495 fd.access_flags(),
496 true)) {
497 ResourceMark rm(THREAD);
498 Exceptions::fthrow(
499 THREAD_AND_LOCATION,
500 vmSymbols::java_lang_IllegalAccessError(),
501 "tried to access field %s.%s from class %s",
502 sel_klass->external_name(),
503 fd.name()->as_C_string(),
504 ref_klass->external_name()
505 );
506 return;
507 }
508 }
510 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {
511 resolve_field(result, pool, index, byte, check_only, true, CHECK);
512 }
514 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {
515 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
516 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode");
518 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
519 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
521 // resolve specified klass
522 KlassHandle resolved_klass;
523 if (update_pool) {
524 resolve_klass(resolved_klass, pool, index, CHECK);
525 } else {
526 resolve_klass_no_update(resolved_klass, pool, index, CHECK);
527 }
528 // Load these early in case the resolve of the containing klass fails
529 Symbol* field = pool->name_ref_at(index);
530 Symbol* sig = pool->signature_ref_at(index);
531 // Check if there's a resolved klass containing the field
532 if( resolved_klass.is_null() ) {
533 ResourceMark rm(THREAD);
534 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
535 }
537 // Resolve instance field
538 fieldDescriptor fd; // find_field initializes fd if found
539 KlassHandle sel_klass(THREAD, instanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
540 // check if field exists; i.e., if a klass containing the field def has been selected
541 if (sel_klass.is_null()){
542 ResourceMark rm(THREAD);
543 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
544 }
546 // check access
547 KlassHandle ref_klass(THREAD, pool->pool_holder());
548 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);
550 // check for errors
551 if (is_static != fd.is_static()) {
552 ResourceMark rm(THREAD);
553 char msg[200];
554 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());
555 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
556 }
558 // Final fields can only be accessed from its own class.
559 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) {
560 THROW(vmSymbols::java_lang_IllegalAccessError());
561 }
563 // initialize resolved_klass if necessary
564 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
565 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
566 //
567 // note 2: we don't want to force initialization if we are just checking
568 // if the field access is legal; e.g., during compilation
569 if (is_static && !check_only) {
570 sel_klass->initialize(CHECK);
571 }
573 {
574 HandleMark hm(THREAD);
575 Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader());
576 Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader());
577 Symbol* signature_ref = pool->signature_ref_at(index);
578 {
579 ResourceMark rm(THREAD);
580 char* failed_type_name =
581 SystemDictionary::check_signature_loaders(signature_ref,
582 ref_loader, sel_loader,
583 false,
584 CHECK);
585 if (failed_type_name != NULL) {
586 const char* msg = "loader constraint violation: when resolving field"
587 " \"%s\" the class loader (instance of %s) of the referring class, "
588 "%s, and the class loader (instance of %s) for the field's resolved "
589 "type, %s, have different Class objects for that type";
590 char* field_name = field->as_C_string();
591 const char* loader1 = SystemDictionary::loader_name(ref_loader());
592 char* sel = instanceKlass::cast(sel_klass())->name()->as_C_string();
593 const char* loader2 = SystemDictionary::loader_name(sel_loader());
594 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
595 strlen(sel) + strlen(loader2) + strlen(failed_type_name);
596 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
597 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
598 failed_type_name);
599 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
600 }
601 }
602 }
604 // return information. note that the klass is set to the actual klass containing the
605 // field, otherwise access of static fields in superclasses will not work.
606 KlassHandle holder (THREAD, fd.field_holder());
607 Symbol* name = fd.name();
608 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());
609 }
612 //------------------------------------------------------------------------------------------------------------------------
613 // Invoke resolution
614 //
615 // Naming conventions:
616 //
617 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
618 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
619 // resolved_klass the specified klass (i.e., specified via constant pool index)
620 // recv_klass the receiver klass
623 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
624 Symbol* method_signature, KlassHandle current_klass,
625 bool check_access, bool initialize_class, TRAPS) {
626 methodHandle resolved_method;
627 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
628 resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder()));
630 // Initialize klass (this should only happen if everything is ok)
631 if (initialize_class && resolved_klass->should_be_initialized()) {
632 resolved_klass->initialize(CHECK);
633 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
634 }
636 // setup result
637 result.set_static(resolved_klass, resolved_method, CHECK);
638 }
640 // throws linktime exceptions
641 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
642 Symbol* method_name, Symbol* method_signature,
643 KlassHandle current_klass, bool check_access, TRAPS) {
645 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
646 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
648 // check if static
649 if (!resolved_method->is_static()) {
650 ResourceMark rm(THREAD);
651 char buf[200];
652 jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
653 resolved_method->name(),
654 resolved_method->signature()));
655 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
656 }
657 }
660 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
661 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
662 methodHandle resolved_method;
663 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
664 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
665 }
667 // throws linktime exceptions
668 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
669 Symbol* method_name, Symbol* method_signature,
670 KlassHandle current_klass, bool check_access, TRAPS) {
672 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
674 // check if method name is <init>, that it is found in same klass as static type
675 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
676 resolved_method->method_holder() != resolved_klass()) {
677 ResourceMark rm(THREAD);
678 Exceptions::fthrow(
679 THREAD_AND_LOCATION,
680 vmSymbols::java_lang_NoSuchMethodError(),
681 "%s: method %s%s not found",
682 resolved_klass->external_name(),
683 resolved_method->name()->as_C_string(),
684 resolved_method->signature()->as_C_string()
685 );
686 return;
687 }
689 // check if not static
690 if (resolved_method->is_static()) {
691 ResourceMark rm(THREAD);
692 char buf[200];
693 jio_snprintf(buf, sizeof(buf),
694 "Expecting non-static method %s",
695 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
696 resolved_method->name(),
697 resolved_method->signature()));
698 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
699 }
700 }
702 // throws runtime exceptions
703 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
704 KlassHandle current_klass, bool check_access, TRAPS) {
706 // resolved method is selected method unless we have an old-style lookup
707 methodHandle sel_method(THREAD, resolved_method());
709 // check if this is an old-style super call and do a new lookup if so
710 { KlassHandle method_klass = KlassHandle(THREAD,
711 resolved_method->method_holder());
713 if (check_access &&
714 // a) check if ACC_SUPER flag is set for the current class
715 current_klass->is_super() &&
716 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
717 current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() &&
718 // c) check if the method is not <init>
719 resolved_method->name() != vmSymbols::object_initializer_name()) {
720 // Lookup super method
721 KlassHandle super_klass(THREAD, current_klass->super());
722 lookup_instance_method_in_klasses(sel_method, super_klass,
723 resolved_method->name(),
724 resolved_method->signature(), CHECK);
725 // check if found
726 if (sel_method.is_null()) {
727 ResourceMark rm(THREAD);
728 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
729 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
730 resolved_method->name(),
731 resolved_method->signature()));
732 }
733 }
734 }
736 // check if not static
737 if (sel_method->is_static()) {
738 ResourceMark rm(THREAD);
739 char buf[200];
740 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
741 resolved_method->name(),
742 resolved_method->signature()));
743 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
744 }
746 // check if abstract
747 if (sel_method->is_abstract()) {
748 ResourceMark rm(THREAD);
749 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
750 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
751 sel_method->name(),
752 sel_method->signature()));
753 }
755 // setup result
756 result.set_static(resolved_klass, sel_method, CHECK);
757 }
759 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
760 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
761 bool check_access, bool check_null_and_abstract, TRAPS) {
762 methodHandle resolved_method;
763 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
764 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
765 }
767 // throws linktime exceptions
768 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
769 Symbol* method_name, Symbol* method_signature,
770 KlassHandle current_klass, bool check_access, TRAPS) {
771 // normal method resolution
772 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
774 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
775 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
777 // check if not static
778 if (resolved_method->is_static()) {
779 ResourceMark rm(THREAD);
780 char buf[200];
781 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
782 resolved_method->name(),
783 resolved_method->signature()));
784 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
785 }
786 }
788 // throws runtime exceptions
789 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
790 methodHandle resolved_method,
791 KlassHandle resolved_klass,
792 Handle recv,
793 KlassHandle recv_klass,
794 bool check_null_and_abstract,
795 TRAPS) {
797 // setup default return values
798 int vtable_index = methodOopDesc::invalid_vtable_index;
799 methodHandle selected_method;
801 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
803 // runtime method resolution
804 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
805 THROW(vmSymbols::java_lang_NullPointerException());
806 }
808 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's
809 // has not been rewritten, and the vtable initialized.
810 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");
812 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's
813 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
814 // a missing receiver might result in a bogus lookup.
815 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");
817 // do lookup based on receiver klass using the vtable index
818 if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method
819 vtable_index = vtable_index_of_miranda_method(resolved_klass,
820 resolved_method->name(),
821 resolved_method->signature(), CHECK);
822 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
824 instanceKlass* inst = instanceKlass::cast(recv_klass());
825 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
826 } else {
827 // at this point we are sure that resolved_method is virtual and not
828 // a miranda method; therefore, it must have a valid vtable index.
829 vtable_index = resolved_method->vtable_index();
830 // We could get a negative vtable_index for final methods,
831 // because as an optimization they are they are never put in the vtable,
832 // unless they override an existing method.
833 // If we do get a negative, it means the resolved method is the the selected
834 // method, and it can never be changed by an override.
835 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) {
836 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
837 selected_method = resolved_method;
838 } else {
839 // recv_klass might be an arrayKlassOop but all vtables start at
840 // the same place. The cast is to avoid virtual call and assertion.
841 instanceKlass* inst = (instanceKlass*)recv_klass()->klass_part();
842 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
843 }
844 }
846 // check if method exists
847 if (selected_method.is_null()) {
848 ResourceMark rm(THREAD);
849 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
850 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
851 resolved_method->name(),
852 resolved_method->signature()));
853 }
855 // check if abstract
856 if (check_null_and_abstract && selected_method->is_abstract()) {
857 ResourceMark rm(THREAD);
858 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
859 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
860 selected_method->name(),
861 selected_method->signature()));
862 }
864 // setup result
865 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
866 }
868 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
869 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
870 bool check_access, bool check_null_and_abstract, TRAPS) {
871 methodHandle resolved_method;
872 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
873 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
874 }
876 // throws linktime exceptions
877 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
878 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
879 // normal interface method resolution
880 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
882 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
883 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
884 }
886 // throws runtime exceptions
887 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
888 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
889 // check if receiver exists
890 if (check_null_and_abstract && recv.is_null()) {
891 THROW(vmSymbols::java_lang_NullPointerException());
892 }
894 // check if receiver klass implements the resolved interface
895 if (!recv_klass->is_subtype_of(resolved_klass())) {
896 ResourceMark rm(THREAD);
897 char buf[200];
898 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
899 (Klass::cast(recv_klass()))->external_name(),
900 (Klass::cast(resolved_klass()))->external_name());
901 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
902 }
903 // do lookup based on receiver klass
904 methodHandle sel_method;
905 lookup_instance_method_in_klasses(sel_method, recv_klass,
906 resolved_method->name(),
907 resolved_method->signature(), CHECK);
908 // check if method exists
909 if (sel_method.is_null()) {
910 ResourceMark rm(THREAD);
911 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
912 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
913 resolved_method->name(),
914 resolved_method->signature()));
915 }
916 // check if public
917 if (!sel_method->is_public()) {
918 ResourceMark rm(THREAD);
919 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
920 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
921 sel_method->name(),
922 sel_method->signature()));
923 }
924 // check if abstract
925 if (check_null_and_abstract && sel_method->is_abstract()) {
926 ResourceMark rm(THREAD);
927 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
928 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
929 sel_method->name(),
930 sel_method->signature()));
931 }
932 // setup result
933 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);
934 }
937 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
938 KlassHandle resolved_klass,
939 Symbol* method_name,
940 Symbol* method_signature,
941 KlassHandle current_klass,
942 bool check_access) {
943 EXCEPTION_MARK;
944 methodHandle method_result;
945 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
946 if (HAS_PENDING_EXCEPTION) {
947 CLEAR_PENDING_EXCEPTION;
948 return methodHandle();
949 } else {
950 return method_result;
951 }
952 }
954 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
955 KlassHandle resolved_klass,
956 Symbol* method_name,
957 Symbol* method_signature,
958 KlassHandle current_klass,
959 bool check_access) {
960 EXCEPTION_MARK;
961 methodHandle method_result;
962 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
963 if (HAS_PENDING_EXCEPTION) {
964 CLEAR_PENDING_EXCEPTION;
965 return methodHandle();
966 } else {
967 return method_result;
968 }
969 }
971 methodHandle LinkResolver::resolve_virtual_call_or_null(
972 KlassHandle receiver_klass,
973 KlassHandle resolved_klass,
974 Symbol* name,
975 Symbol* signature,
976 KlassHandle current_klass) {
977 EXCEPTION_MARK;
978 CallInfo info;
979 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
980 if (HAS_PENDING_EXCEPTION) {
981 CLEAR_PENDING_EXCEPTION;
982 return methodHandle();
983 }
984 return info.selected_method();
985 }
987 methodHandle LinkResolver::resolve_interface_call_or_null(
988 KlassHandle receiver_klass,
989 KlassHandle resolved_klass,
990 Symbol* name,
991 Symbol* signature,
992 KlassHandle current_klass) {
993 EXCEPTION_MARK;
994 CallInfo info;
995 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
996 if (HAS_PENDING_EXCEPTION) {
997 CLEAR_PENDING_EXCEPTION;
998 return methodHandle();
999 }
1000 return info.selected_method();
1001 }
1003 int LinkResolver::resolve_virtual_vtable_index(
1004 KlassHandle receiver_klass,
1005 KlassHandle resolved_klass,
1006 Symbol* name,
1007 Symbol* signature,
1008 KlassHandle current_klass) {
1009 EXCEPTION_MARK;
1010 CallInfo info;
1011 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1012 if (HAS_PENDING_EXCEPTION) {
1013 CLEAR_PENDING_EXCEPTION;
1014 return methodOopDesc::invalid_vtable_index;
1015 }
1016 return info.vtable_index();
1017 }
1019 methodHandle LinkResolver::resolve_static_call_or_null(
1020 KlassHandle resolved_klass,
1021 Symbol* name,
1022 Symbol* signature,
1023 KlassHandle current_klass) {
1024 EXCEPTION_MARK;
1025 CallInfo info;
1026 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1027 if (HAS_PENDING_EXCEPTION) {
1028 CLEAR_PENDING_EXCEPTION;
1029 return methodHandle();
1030 }
1031 return info.selected_method();
1032 }
1034 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1035 KlassHandle current_klass) {
1036 EXCEPTION_MARK;
1037 CallInfo info;
1038 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1039 if (HAS_PENDING_EXCEPTION) {
1040 CLEAR_PENDING_EXCEPTION;
1041 return methodHandle();
1042 }
1043 return info.selected_method();
1044 }
1048 //------------------------------------------------------------------------------------------------------------------------
1049 // ConstantPool entries
1051 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1052 switch (byte) {
1053 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1054 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1055 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1056 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1057 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1058 }
1059 return;
1060 }
1062 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1063 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1064 // resolve klass
1065 resolve_klass(resolved_klass, pool, index, CHECK);
1067 // Get name, signature, and static klass
1068 method_name = pool->name_ref_at(index);
1069 method_signature = pool->signature_ref_at(index);
1070 current_klass = KlassHandle(THREAD, pool->pool_holder());
1071 }
1074 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1075 KlassHandle resolved_klass;
1076 Symbol* method_name = NULL;
1077 Symbol* method_signature = NULL;
1078 KlassHandle current_klass;
1079 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1080 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1081 }
1084 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1085 KlassHandle resolved_klass;
1086 Symbol* method_name = NULL;
1087 Symbol* method_signature = NULL;
1088 KlassHandle current_klass;
1089 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1090 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1091 }
1094 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1095 constantPoolHandle pool, int index,
1096 TRAPS) {
1098 KlassHandle resolved_klass;
1099 Symbol* method_name = NULL;
1100 Symbol* method_signature = NULL;
1101 KlassHandle current_klass;
1102 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1103 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass());
1104 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1105 }
1108 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1109 KlassHandle resolved_klass;
1110 Symbol* method_name = NULL;
1111 Symbol* method_signature = NULL;
1112 KlassHandle current_klass;
1113 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1114 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass());
1115 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1116 }
1119 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int raw_index, TRAPS) {
1120 assert(EnableInvokeDynamic, "");
1122 // This guy is reached from InterpreterRuntime::resolve_invokedynamic.
1124 // At this point, we only need the signature, and can ignore the name.
1125 Symbol* method_signature = pool->signature_ref_at(raw_index); // raw_index works directly
1126 Symbol* method_name = vmSymbols::invokeExact_name();
1127 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass();
1129 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...)
1130 // The extra MH receiver will be inserted into the stack on every call.
1131 methodHandle resolved_method;
1132 KlassHandle current_klass(THREAD, pool->pool_holder());
1133 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, THREAD);
1134 if (HAS_PENDING_EXCEPTION) {
1135 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1136 // throw these guys, since they are already wrapped
1137 return;
1138 }
1139 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1140 // intercept only LinkageErrors which might have failed to wrap
1141 return;
1142 }
1143 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1144 Handle ex(THREAD, PENDING_EXCEPTION);
1145 CLEAR_PENDING_EXCEPTION;
1146 oop bsme = Klass::cast(SystemDictionary::BootstrapMethodError_klass())->java_mirror();
1147 MethodHandles::raise_exception(Bytecodes::_athrow, ex(), bsme, CHECK);
1148 // java code should not return, but if it does throw out anyway
1149 THROW(vmSymbols::java_lang_InternalError());
1150 }
1151 if (resolved_method.is_null()) {
1152 THROW(vmSymbols::java_lang_InternalError());
1153 }
1154 result.set_dynamic(resolved_method, CHECK);
1155 }
1157 //------------------------------------------------------------------------------------------------------------------------
1158 #ifndef PRODUCT
1160 void FieldAccessInfo::print() {
1161 ResourceMark rm;
1162 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());
1163 }
1165 #endif
