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--- old/src/share/vm/interpreter/linkResolver.cpp
+++ new/src/share/vm/interpreter/linkResolver.cpp
1 1 /*
2 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 20 * or visit www.oracle.com if you need additional information or have any
21 21 * questions.
22 22 *
23 23 */
24 24
25 25 #include "precompiled.hpp"
26 26 #include "classfile/systemDictionary.hpp"
27 27 #include "classfile/vmSymbols.hpp"
28 28 #include "compiler/compileBroker.hpp"
29 29 #include "gc_interface/collectedHeap.inline.hpp"
30 30 #include "interpreter/bytecode.hpp"
31 31 #include "interpreter/interpreterRuntime.hpp"
32 32 #include "interpreter/linkResolver.hpp"
33 33 #include "memory/resourceArea.hpp"
34 34 #include "memory/universe.inline.hpp"
35 35 #include "oops/instanceKlass.hpp"
36 36 #include "oops/objArrayOop.hpp"
37 37 #include "prims/methodHandles.hpp"
38 38 #include "prims/nativeLookup.hpp"
39 39 #include "runtime/compilationPolicy.hpp"
40 40 #include "runtime/fieldDescriptor.hpp"
41 41 #include "runtime/frame.inline.hpp"
42 42 #include "runtime/handles.inline.hpp"
43 43 #include "runtime/reflection.hpp"
44 44 #include "runtime/signature.hpp"
45 45 #include "runtime/vmThread.hpp"
46 46 #ifdef TARGET_OS_FAMILY_linux
47 47 # include "thread_linux.inline.hpp"
48 48 #endif
49 49 #ifdef TARGET_OS_FAMILY_solaris
50 50 # include "thread_solaris.inline.hpp"
51 51 #endif
52 52 #ifdef TARGET_OS_FAMILY_windows
53 53 # include "thread_windows.inline.hpp"
54 54 #endif
55 55
56 56 //------------------------------------------------------------------------------------------------------------------------
57 57 // Implementation of FieldAccessInfo
58 58
59 59 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset,
60 60 BasicType field_type, AccessFlags access_flags) {
61 61 _klass = klass;
62 62 _name = name;
63 63 _field_index = field_index;
64 64 _field_offset = field_offset;
65 65 _field_type = field_type;
66 66 _access_flags = access_flags;
67 67 }
68 68
69 69
70 70 //------------------------------------------------------------------------------------------------------------------------
71 71 // Implementation of CallInfo
72 72
73 73
74 74 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
75 75 int vtable_index = methodOopDesc::nonvirtual_vtable_index;
76 76 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
77 77 }
78 78
79 79
80 80 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) {
81 81 // This is only called for interface methods. If the resolved_method
82 82 // comes from java/lang/Object, it can be the subject of a virtual call, so
83 83 // we should pick the vtable index from the resolved method.
84 84 // Other than that case, there is no valid vtable index to specify.
85 85 int vtable_index = methodOopDesc::invalid_vtable_index;
86 86 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) {
87 87 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check");
88 88 vtable_index = resolved_method->vtable_index();
89 89 }
90 90 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
91 91 }
92 92
93 93 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
94 94 assert(vtable_index >= 0 || vtable_index == methodOopDesc::nonvirtual_vtable_index, "valid index");
95 95 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
96 96 }
97 97
98 98 void CallInfo::set_dynamic(methodHandle resolved_method, TRAPS) {
99 99 assert(resolved_method->is_method_handle_invoke(), "");
100 100 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass();
101 101 assert(resolved_klass == resolved_method->method_holder(), "");
102 102 int vtable_index = methodOopDesc::nonvirtual_vtable_index;
103 103 assert(resolved_method->vtable_index() == vtable_index, "");
104 104 set_common(resolved_klass, KlassHandle(), resolved_method, resolved_method, vtable_index, CHECK);
105 105 }
106 106
107 107 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
108 108 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
109 109 _resolved_klass = resolved_klass;
110 110 _selected_klass = selected_klass;
111 111 _resolved_method = resolved_method;
112 112 _selected_method = selected_method;
113 113 _vtable_index = vtable_index;
114 114 if (CompilationPolicy::must_be_compiled(selected_method)) {
115 115 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
116 116
117 117 // Note: with several active threads, the must_be_compiled may be true
118 118 // while can_be_compiled is false; remove assert
119 119 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
120 120 if (THREAD->is_Compiler_thread()) {
121 121 // don't force compilation, resolve was on behalf of compiler
122 122 return;
123 123 }
124 124 if (instanceKlass::cast(selected_method->method_holder())->is_not_initialized()) {
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124 lines elided |
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125 125 // 'is_not_initialized' means not only '!is_initialized', but also that
126 126 // initialization has not been started yet ('!being_initialized')
127 127 // Do not force compilation of methods in uninitialized classes.
128 128 // Note that doing this would throw an assert later,
129 129 // in CompileBroker::compile_method.
130 130 // We sometimes use the link resolver to do reflective lookups
131 131 // even before classes are initialized.
132 132 return;
133 133 }
134 134 CompileBroker::compile_method(selected_method, InvocationEntryBci,
135 - CompLevel_initial_compile,
135 + CompilationPolicy::policy()->initial_compile_level(),
136 136 methodHandle(), 0, "must_be_compiled", CHECK);
137 137 }
138 138 }
139 139
140 140
141 141 //------------------------------------------------------------------------------------------------------------------------
142 142 // Klass resolution
143 143
144 144 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
145 145 if (!Reflection::verify_class_access(ref_klass->as_klassOop(),
146 146 sel_klass->as_klassOop(),
147 147 true)) {
148 148 ResourceMark rm(THREAD);
149 149 Exceptions::fthrow(
150 150 THREAD_AND_LOCATION,
151 151 vmSymbols::java_lang_IllegalAccessError(),
152 152 "tried to access class %s from class %s",
153 153 sel_klass->external_name(),
154 154 ref_klass->external_name()
155 155 );
156 156 return;
157 157 }
158 158 }
159 159
160 160 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
161 161 klassOop result_oop = pool->klass_ref_at(index, CHECK);
162 162 result = KlassHandle(THREAD, result_oop);
163 163 }
164 164
165 165 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
166 166 klassOop result_oop =
167 167 constantPoolOopDesc::klass_ref_at_if_loaded_check(pool, index, CHECK);
168 168 result = KlassHandle(THREAD, result_oop);
169 169 }
170 170
171 171
172 172 //------------------------------------------------------------------------------------------------------------------------
173 173 // Method resolution
174 174 //
175 175 // According to JVM spec. $5.4.3c & $5.4.3d
176 176
177 177 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
178 178 methodOop result_oop = klass->uncached_lookup_method(name, signature);
179 179 if (EnableInvokeDynamic && result_oop != NULL) {
180 180 switch (result_oop->intrinsic_id()) {
181 181 case vmIntrinsics::_invokeExact:
182 182 case vmIntrinsics::_invokeGeneric:
183 183 case vmIntrinsics::_invokeDynamic:
184 184 // Do not link directly to these. The VM must produce a synthetic one using lookup_implicit_method.
185 185 return;
186 186 }
187 187 }
188 188 result = methodHandle(THREAD, result_oop);
189 189 }
190 190
191 191 // returns first instance method
192 192 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
193 193 methodOop result_oop = klass->uncached_lookup_method(name, signature);
194 194 result = methodHandle(THREAD, result_oop);
195 195 while (!result.is_null() && result->is_static()) {
196 196 klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super());
197 197 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature));
198 198 }
199 199 }
200 200
201 201
202 202 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
203 203 ResourceMark rm(THREAD);
204 204 klassVtable *vt = instanceKlass::cast(klass())->vtable();
205 205 return vt->index_of_miranda(name, signature);
206 206 }
207 207
208 208 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
209 209 instanceKlass *ik = instanceKlass::cast(klass());
210 210 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature));
211 211 }
212 212
213 213 void LinkResolver::lookup_implicit_method(methodHandle& result,
214 214 KlassHandle klass, Symbol* name, Symbol* signature,
215 215 KlassHandle current_klass,
216 216 TRAPS) {
217 217 if (EnableInvokeDynamic &&
218 218 klass() == SystemDictionary::MethodHandle_klass() &&
219 219 methodOopDesc::is_method_handle_invoke_name(name)) {
220 220 if (!THREAD->is_Compiler_thread() && !MethodHandles::enabled()) {
221 221 // Make sure the Java part of the runtime has been booted up.
222 222 klassOop natives = SystemDictionary::MethodHandleNatives_klass();
223 223 if (natives == NULL || instanceKlass::cast(natives)->is_not_initialized()) {
224 224 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
225 225 Handle(),
226 226 Handle(),
227 227 true,
228 228 CHECK);
229 229 }
230 230 }
231 231 methodOop result_oop = SystemDictionary::find_method_handle_invoke(name,
232 232 signature,
233 233 current_klass,
234 234 CHECK);
235 235 if (result_oop != NULL) {
236 236 assert(result_oop->is_method_handle_invoke() && result_oop->signature() == signature, "consistent");
237 237 result = methodHandle(THREAD, result_oop);
238 238 }
239 239 }
240 240 }
241 241
242 242 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
243 243 KlassHandle resolved_klass,
244 244 KlassHandle sel_klass,
245 245 methodHandle sel_method,
246 246 TRAPS) {
247 247
248 248 AccessFlags flags = sel_method->access_flags();
249 249
250 250 // Special case: arrays always override "clone". JVMS 2.15.
251 251 // If the resolved klass is an array class, and the declaring class
252 252 // is java.lang.Object and the method is "clone", set the flags
253 253 // to public.
254 254 //
255 255 // We'll check for the method name first, as that's most likely
256 256 // to be false (so we'll short-circuit out of these tests).
257 257 if (sel_method->name() == vmSymbols::clone_name() &&
258 258 sel_klass() == SystemDictionary::Object_klass() &&
259 259 resolved_klass->oop_is_array()) {
260 260 // We need to change "protected" to "public".
261 261 assert(flags.is_protected(), "clone not protected?");
262 262 jint new_flags = flags.as_int();
263 263 new_flags = new_flags & (~JVM_ACC_PROTECTED);
264 264 new_flags = new_flags | JVM_ACC_PUBLIC;
265 265 flags.set_flags(new_flags);
266 266 }
267 267
268 268 if (!Reflection::verify_field_access(ref_klass->as_klassOop(),
269 269 resolved_klass->as_klassOop(),
270 270 sel_klass->as_klassOop(),
271 271 flags,
272 272 true)) {
273 273 ResourceMark rm(THREAD);
274 274 Exceptions::fthrow(
275 275 THREAD_AND_LOCATION,
276 276 vmSymbols::java_lang_IllegalAccessError(),
277 277 "tried to access method %s.%s%s from class %s",
278 278 sel_klass->external_name(),
279 279 sel_method->name()->as_C_string(),
280 280 sel_method->signature()->as_C_string(),
281 281 ref_klass->external_name()
282 282 );
283 283 return;
284 284 }
285 285 }
286 286
287 287 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle& resolved_klass,
288 288 constantPoolHandle pool, int index, TRAPS) {
289 289
290 290 // resolve klass
291 291 resolve_klass(resolved_klass, pool, index, CHECK);
292 292
293 293 Symbol* method_name = pool->name_ref_at(index);
294 294 Symbol* method_signature = pool->signature_ref_at(index);
295 295 KlassHandle current_klass(THREAD, pool->pool_holder());
296 296
297 297 if (pool->has_preresolution()
298 298 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
299 299 methodOopDesc::is_method_handle_invoke_name(method_name))) {
300 300 methodOop result_oop = constantPoolOopDesc::method_at_if_loaded(pool, index);
301 301 if (result_oop != NULL) {
302 302 resolved_method = methodHandle(THREAD, result_oop);
303 303 return;
304 304 }
305 305 }
306 306
307 307 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
308 308 }
309 309
310 310 void LinkResolver::resolve_dynamic_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) {
311 311 // The class is java.lang.invoke.MethodHandle
312 312 resolved_klass = SystemDictionaryHandles::MethodHandle_klass();
313 313
314 314 Symbol* method_name = vmSymbols::invokeExact_name();
315 315
316 316 Symbol* method_signature = pool->signature_ref_at(index);
317 317 KlassHandle current_klass (THREAD, pool->pool_holder());
318 318
319 319 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
320 320 }
321 321
322 322 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) {
323 323
324 324 // resolve klass
325 325 resolve_klass(resolved_klass, pool, index, CHECK);
326 326 Symbol* method_name = pool->name_ref_at(index);
327 327 Symbol* method_signature = pool->signature_ref_at(index);
328 328 KlassHandle current_klass(THREAD, pool->pool_holder());
329 329
330 330 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
331 331 }
332 332
333 333
334 334 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
335 335 Symbol* method_name, Symbol* method_signature,
336 336 KlassHandle current_klass, bool check_access, TRAPS) {
337 337
338 338 // 1. check if klass is not interface
339 339 if (resolved_klass->is_interface()) {
340 340 ResourceMark rm(THREAD);
341 341 char buf[200];
342 342 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name());
343 343 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
344 344 }
345 345
346 346 // 2. lookup method in resolved klass and its super klasses
347 347 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
348 348
349 349 if (resolved_method.is_null()) { // not found in the class hierarchy
350 350 // 3. lookup method in all the interfaces implemented by the resolved klass
351 351 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
352 352
353 353 if (resolved_method.is_null()) {
354 354 // JSR 292: see if this is an implicitly generated method MethodHandle.invoke(*...)
355 355 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, CHECK);
356 356 }
357 357
358 358 if (resolved_method.is_null()) {
359 359 // 4. method lookup failed
360 360 ResourceMark rm(THREAD);
361 361 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
362 362 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
363 363 method_name,
364 364 method_signature));
365 365 }
366 366 }
367 367
368 368 // 5. check if method is concrete
369 369 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
370 370 ResourceMark rm(THREAD);
371 371 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
372 372 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
373 373 method_name,
374 374 method_signature));
375 375 }
376 376
377 377 // 6. access checks, access checking may be turned off when calling from within the VM.
378 378 if (check_access) {
379 379 assert(current_klass.not_null() , "current_klass should not be null");
380 380
381 381 // check if method can be accessed by the referring class
382 382 check_method_accessability(current_klass,
383 383 resolved_klass,
384 384 KlassHandle(THREAD, resolved_method->method_holder()),
385 385 resolved_method,
386 386 CHECK);
387 387
388 388 // check loader constraints
389 389 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader());
390 390 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader());
391 391 {
392 392 ResourceMark rm(THREAD);
393 393 char* failed_type_name =
394 394 SystemDictionary::check_signature_loaders(method_signature, loader,
395 395 class_loader, true, CHECK);
396 396 if (failed_type_name != NULL) {
397 397 const char* msg = "loader constraint violation: when resolving method"
398 398 " \"%s\" the class loader (instance of %s) of the current class, %s,"
399 399 " and the class loader (instance of %s) for resolved class, %s, have"
400 400 " different Class objects for the type %s used in the signature";
401 401 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature);
402 402 const char* loader1 = SystemDictionary::loader_name(loader());
403 403 char* current = instanceKlass::cast(current_klass())->name()->as_C_string();
404 404 const char* loader2 = SystemDictionary::loader_name(class_loader());
405 405 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string();
406 406 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
407 407 strlen(current) + strlen(loader2) + strlen(resolved) +
408 408 strlen(failed_type_name);
409 409 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
410 410 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
411 411 resolved, failed_type_name);
412 412 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
413 413 }
414 414 }
415 415 }
416 416 }
417 417
418 418 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
419 419 KlassHandle resolved_klass,
420 420 Symbol* method_name,
421 421 Symbol* method_signature,
422 422 KlassHandle current_klass,
423 423 bool check_access, TRAPS) {
424 424
425 425 // check if klass is interface
426 426 if (!resolved_klass->is_interface()) {
427 427 ResourceMark rm(THREAD);
428 428 char buf[200];
429 429 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name());
430 430 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
431 431 }
432 432
433 433 // lookup method in this interface or its super, java.lang.Object
434 434 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
435 435
436 436 if (resolved_method.is_null()) {
437 437 // lookup method in all the super-interfaces
438 438 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
439 439 if (resolved_method.is_null()) {
440 440 // no method found
441 441 ResourceMark rm(THREAD);
442 442 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
443 443 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
444 444 method_name,
445 445 method_signature));
446 446 }
447 447 }
448 448
449 449 if (check_access) {
450 450 HandleMark hm(THREAD);
451 451 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader());
452 452 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader());
453 453 {
454 454 ResourceMark rm(THREAD);
455 455 char* failed_type_name =
456 456 SystemDictionary::check_signature_loaders(method_signature, loader,
457 457 class_loader, true, CHECK);
458 458 if (failed_type_name != NULL) {
459 459 const char* msg = "loader constraint violation: when resolving "
460 460 "interface method \"%s\" the class loader (instance of %s) of the "
461 461 "current class, %s, and the class loader (instance of %s) for "
462 462 "resolved class, %s, have different Class objects for the type %s "
463 463 "used in the signature";
464 464 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature);
465 465 const char* loader1 = SystemDictionary::loader_name(loader());
466 466 char* current = instanceKlass::cast(current_klass())->name()->as_C_string();
467 467 const char* loader2 = SystemDictionary::loader_name(class_loader());
468 468 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string();
469 469 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
470 470 strlen(current) + strlen(loader2) + strlen(resolved) +
471 471 strlen(failed_type_name);
472 472 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
473 473 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
474 474 resolved, failed_type_name);
475 475 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
476 476 }
477 477 }
478 478 }
479 479 }
480 480
481 481 //------------------------------------------------------------------------------------------------------------------------
482 482 // Field resolution
483 483
484 484 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
485 485 KlassHandle resolved_klass,
486 486 KlassHandle sel_klass,
487 487 fieldDescriptor& fd,
488 488 TRAPS) {
489 489 if (!Reflection::verify_field_access(ref_klass->as_klassOop(),
490 490 resolved_klass->as_klassOop(),
491 491 sel_klass->as_klassOop(),
492 492 fd.access_flags(),
493 493 true)) {
494 494 ResourceMark rm(THREAD);
495 495 Exceptions::fthrow(
496 496 THREAD_AND_LOCATION,
497 497 vmSymbols::java_lang_IllegalAccessError(),
498 498 "tried to access field %s.%s from class %s",
499 499 sel_klass->external_name(),
500 500 fd.name()->as_C_string(),
501 501 ref_klass->external_name()
502 502 );
503 503 return;
504 504 }
505 505 }
506 506
507 507 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {
508 508 resolve_field(result, pool, index, byte, check_only, true, CHECK);
509 509 }
510 510
511 511 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {
512 512 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
513 513 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode");
514 514
515 515 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
516 516 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
517 517
518 518 // resolve specified klass
519 519 KlassHandle resolved_klass;
520 520 if (update_pool) {
521 521 resolve_klass(resolved_klass, pool, index, CHECK);
522 522 } else {
523 523 resolve_klass_no_update(resolved_klass, pool, index, CHECK);
524 524 }
525 525 // Load these early in case the resolve of the containing klass fails
526 526 Symbol* field = pool->name_ref_at(index);
527 527 Symbol* sig = pool->signature_ref_at(index);
528 528 // Check if there's a resolved klass containing the field
529 529 if( resolved_klass.is_null() ) {
530 530 ResourceMark rm(THREAD);
531 531 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
532 532 }
533 533
534 534 // Resolve instance field
535 535 fieldDescriptor fd; // find_field initializes fd if found
536 536 KlassHandle sel_klass(THREAD, instanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
537 537 // check if field exists; i.e., if a klass containing the field def has been selected
538 538 if (sel_klass.is_null()){
539 539 ResourceMark rm(THREAD);
540 540 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
541 541 }
542 542
543 543 // check access
544 544 KlassHandle ref_klass(THREAD, pool->pool_holder());
545 545 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);
546 546
547 547 // check for errors
548 548 if (is_static != fd.is_static()) {
549 549 ResourceMark rm(THREAD);
550 550 char msg[200];
551 551 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());
552 552 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
553 553 }
554 554
555 555 // Final fields can only be accessed from its own class.
556 556 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) {
557 557 THROW(vmSymbols::java_lang_IllegalAccessError());
558 558 }
559 559
560 560 // initialize resolved_klass if necessary
561 561 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
562 562 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
563 563 //
564 564 // note 2: we don't want to force initialization if we are just checking
565 565 // if the field access is legal; e.g., during compilation
566 566 if (is_static && !check_only) {
567 567 sel_klass->initialize(CHECK);
568 568 }
569 569
570 570 {
571 571 HandleMark hm(THREAD);
572 572 Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader());
573 573 Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader());
574 574 Symbol* signature_ref = pool->signature_ref_at(index);
575 575 {
576 576 ResourceMark rm(THREAD);
577 577 char* failed_type_name =
578 578 SystemDictionary::check_signature_loaders(signature_ref,
579 579 ref_loader, sel_loader,
580 580 false,
581 581 CHECK);
582 582 if (failed_type_name != NULL) {
583 583 const char* msg = "loader constraint violation: when resolving field"
584 584 " \"%s\" the class loader (instance of %s) of the referring class, "
585 585 "%s, and the class loader (instance of %s) for the field's resolved "
586 586 "type, %s, have different Class objects for that type";
587 587 char* field_name = field->as_C_string();
588 588 const char* loader1 = SystemDictionary::loader_name(ref_loader());
589 589 char* sel = instanceKlass::cast(sel_klass())->name()->as_C_string();
590 590 const char* loader2 = SystemDictionary::loader_name(sel_loader());
591 591 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
592 592 strlen(sel) + strlen(loader2) + strlen(failed_type_name);
593 593 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
594 594 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
595 595 failed_type_name);
596 596 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
597 597 }
598 598 }
599 599 }
600 600
601 601 // return information. note that the klass is set to the actual klass containing the
602 602 // field, otherwise access of static fields in superclasses will not work.
603 603 KlassHandle holder (THREAD, fd.field_holder());
604 604 Symbol* name = fd.name();
605 605 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());
606 606 }
607 607
608 608
609 609 //------------------------------------------------------------------------------------------------------------------------
610 610 // Invoke resolution
611 611 //
612 612 // Naming conventions:
613 613 //
614 614 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
615 615 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
616 616 // resolved_klass the specified klass (i.e., specified via constant pool index)
617 617 // recv_klass the receiver klass
618 618
619 619
620 620 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
621 621 Symbol* method_signature, KlassHandle current_klass,
622 622 bool check_access, bool initialize_class, TRAPS) {
623 623 methodHandle resolved_method;
624 624 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
625 625 resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder()));
626 626
627 627 // Initialize klass (this should only happen if everything is ok)
628 628 if (initialize_class && resolved_klass->should_be_initialized()) {
629 629 resolved_klass->initialize(CHECK);
630 630 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
631 631 }
632 632
633 633 // setup result
634 634 result.set_static(resolved_klass, resolved_method, CHECK);
635 635 }
636 636
637 637 // throws linktime exceptions
638 638 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
639 639 Symbol* method_name, Symbol* method_signature,
640 640 KlassHandle current_klass, bool check_access, TRAPS) {
641 641
642 642 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
643 643 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
644 644
645 645 // check if static
646 646 if (!resolved_method->is_static()) {
647 647 ResourceMark rm(THREAD);
648 648 char buf[200];
649 649 jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
650 650 resolved_method->name(),
651 651 resolved_method->signature()));
652 652 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
653 653 }
654 654 }
655 655
656 656
657 657 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
658 658 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
659 659 methodHandle resolved_method;
660 660 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
661 661 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
662 662 }
663 663
664 664 // throws linktime exceptions
665 665 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
666 666 Symbol* method_name, Symbol* method_signature,
667 667 KlassHandle current_klass, bool check_access, TRAPS) {
668 668
669 669 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
670 670
671 671 // check if method name is <init>, that it is found in same klass as static type
672 672 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
673 673 resolved_method->method_holder() != resolved_klass()) {
674 674 ResourceMark rm(THREAD);
675 675 Exceptions::fthrow(
676 676 THREAD_AND_LOCATION,
677 677 vmSymbols::java_lang_NoSuchMethodError(),
678 678 "%s: method %s%s not found",
679 679 resolved_klass->external_name(),
680 680 resolved_method->name()->as_C_string(),
681 681 resolved_method->signature()->as_C_string()
682 682 );
683 683 return;
684 684 }
685 685
686 686 // check if not static
687 687 if (resolved_method->is_static()) {
688 688 ResourceMark rm(THREAD);
689 689 char buf[200];
690 690 jio_snprintf(buf, sizeof(buf),
691 691 "Expecting non-static method %s",
692 692 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
693 693 resolved_method->name(),
694 694 resolved_method->signature()));
695 695 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
696 696 }
697 697 }
698 698
699 699 // throws runtime exceptions
700 700 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
701 701 KlassHandle current_klass, bool check_access, TRAPS) {
702 702
703 703 // resolved method is selected method unless we have an old-style lookup
704 704 methodHandle sel_method(THREAD, resolved_method());
705 705
706 706 // check if this is an old-style super call and do a new lookup if so
707 707 { KlassHandle method_klass = KlassHandle(THREAD,
708 708 resolved_method->method_holder());
709 709
710 710 if (check_access &&
711 711 // a) check if ACC_SUPER flag is set for the current class
712 712 current_klass->is_super() &&
713 713 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
714 714 current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() &&
715 715 // c) check if the method is not <init>
716 716 resolved_method->name() != vmSymbols::object_initializer_name()) {
717 717 // Lookup super method
718 718 KlassHandle super_klass(THREAD, current_klass->super());
719 719 lookup_instance_method_in_klasses(sel_method, super_klass,
720 720 resolved_method->name(),
721 721 resolved_method->signature(), CHECK);
722 722 // check if found
723 723 if (sel_method.is_null()) {
724 724 ResourceMark rm(THREAD);
725 725 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
726 726 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
727 727 resolved_method->name(),
728 728 resolved_method->signature()));
729 729 }
730 730 }
731 731 }
732 732
733 733 // check if not static
734 734 if (sel_method->is_static()) {
735 735 ResourceMark rm(THREAD);
736 736 char buf[200];
737 737 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
738 738 resolved_method->name(),
739 739 resolved_method->signature()));
740 740 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
741 741 }
742 742
743 743 // check if abstract
744 744 if (sel_method->is_abstract()) {
745 745 ResourceMark rm(THREAD);
746 746 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
747 747 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
748 748 sel_method->name(),
749 749 sel_method->signature()));
750 750 }
751 751
752 752 // setup result
753 753 result.set_static(resolved_klass, sel_method, CHECK);
754 754 }
755 755
756 756 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
757 757 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
758 758 bool check_access, bool check_null_and_abstract, TRAPS) {
759 759 methodHandle resolved_method;
760 760 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
761 761 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
762 762 }
763 763
764 764 // throws linktime exceptions
765 765 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
766 766 Symbol* method_name, Symbol* method_signature,
767 767 KlassHandle current_klass, bool check_access, TRAPS) {
768 768 // normal method resolution
769 769 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
770 770
771 771 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
772 772 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
773 773
774 774 // check if not static
775 775 if (resolved_method->is_static()) {
776 776 ResourceMark rm(THREAD);
777 777 char buf[200];
778 778 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
779 779 resolved_method->name(),
780 780 resolved_method->signature()));
781 781 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
782 782 }
783 783 }
784 784
785 785 // throws runtime exceptions
786 786 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
787 787 methodHandle resolved_method,
788 788 KlassHandle resolved_klass,
789 789 Handle recv,
790 790 KlassHandle recv_klass,
791 791 bool check_null_and_abstract,
792 792 TRAPS) {
793 793
794 794 // setup default return values
795 795 int vtable_index = methodOopDesc::invalid_vtable_index;
796 796 methodHandle selected_method;
797 797
798 798 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
799 799
800 800 // runtime method resolution
801 801 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
802 802 THROW(vmSymbols::java_lang_NullPointerException());
803 803 }
804 804
805 805 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's
806 806 // has not been rewritten, and the vtable initialized.
807 807 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");
808 808
809 809 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's
810 810 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
811 811 // a missing receiver might result in a bogus lookup.
812 812 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");
813 813
814 814 // do lookup based on receiver klass using the vtable index
815 815 if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method
816 816 vtable_index = vtable_index_of_miranda_method(resolved_klass,
817 817 resolved_method->name(),
818 818 resolved_method->signature(), CHECK);
819 819 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
820 820
821 821 instanceKlass* inst = instanceKlass::cast(recv_klass());
822 822 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
823 823 } else {
824 824 // at this point we are sure that resolved_method is virtual and not
825 825 // a miranda method; therefore, it must have a valid vtable index.
826 826 vtable_index = resolved_method->vtable_index();
827 827 // We could get a negative vtable_index for final methods,
828 828 // because as an optimization they are they are never put in the vtable,
829 829 // unless they override an existing method.
830 830 // If we do get a negative, it means the resolved method is the the selected
831 831 // method, and it can never be changed by an override.
832 832 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) {
833 833 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
834 834 selected_method = resolved_method;
835 835 } else {
836 836 // recv_klass might be an arrayKlassOop but all vtables start at
837 837 // the same place. The cast is to avoid virtual call and assertion.
838 838 instanceKlass* inst = (instanceKlass*)recv_klass()->klass_part();
839 839 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
840 840 }
841 841 }
842 842
843 843 // check if method exists
844 844 if (selected_method.is_null()) {
845 845 ResourceMark rm(THREAD);
846 846 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
847 847 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
848 848 resolved_method->name(),
849 849 resolved_method->signature()));
850 850 }
851 851
852 852 // check if abstract
853 853 if (check_null_and_abstract && selected_method->is_abstract()) {
854 854 ResourceMark rm(THREAD);
855 855 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
856 856 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
857 857 selected_method->name(),
858 858 selected_method->signature()));
859 859 }
860 860
861 861 // setup result
862 862 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
863 863 }
864 864
865 865 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
866 866 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
867 867 bool check_access, bool check_null_and_abstract, TRAPS) {
868 868 methodHandle resolved_method;
869 869 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
870 870 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
871 871 }
872 872
873 873 // throws linktime exceptions
874 874 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
875 875 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
876 876 // normal interface method resolution
877 877 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
878 878
879 879 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
880 880 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
881 881 }
882 882
883 883 // throws runtime exceptions
884 884 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
885 885 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
886 886 // check if receiver exists
887 887 if (check_null_and_abstract && recv.is_null()) {
888 888 THROW(vmSymbols::java_lang_NullPointerException());
889 889 }
890 890
891 891 // check if receiver klass implements the resolved interface
892 892 if (!recv_klass->is_subtype_of(resolved_klass())) {
893 893 ResourceMark rm(THREAD);
894 894 char buf[200];
895 895 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
896 896 (Klass::cast(recv_klass()))->external_name(),
897 897 (Klass::cast(resolved_klass()))->external_name());
898 898 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
899 899 }
900 900 // do lookup based on receiver klass
901 901 methodHandle sel_method;
902 902 lookup_instance_method_in_klasses(sel_method, recv_klass,
903 903 resolved_method->name(),
904 904 resolved_method->signature(), CHECK);
905 905 // check if method exists
906 906 if (sel_method.is_null()) {
907 907 ResourceMark rm(THREAD);
908 908 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
909 909 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
910 910 resolved_method->name(),
911 911 resolved_method->signature()));
912 912 }
913 913 // check if public
914 914 if (!sel_method->is_public()) {
915 915 ResourceMark rm(THREAD);
916 916 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
917 917 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
918 918 sel_method->name(),
919 919 sel_method->signature()));
920 920 }
921 921 // check if abstract
922 922 if (check_null_and_abstract && sel_method->is_abstract()) {
923 923 ResourceMark rm(THREAD);
924 924 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
925 925 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
926 926 sel_method->name(),
927 927 sel_method->signature()));
928 928 }
929 929 // setup result
930 930 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);
931 931 }
932 932
933 933
934 934 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
935 935 KlassHandle resolved_klass,
936 936 Symbol* method_name,
937 937 Symbol* method_signature,
938 938 KlassHandle current_klass,
939 939 bool check_access) {
940 940 EXCEPTION_MARK;
941 941 methodHandle method_result;
942 942 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
943 943 if (HAS_PENDING_EXCEPTION) {
944 944 CLEAR_PENDING_EXCEPTION;
945 945 return methodHandle();
946 946 } else {
947 947 return method_result;
948 948 }
949 949 }
950 950
951 951 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
952 952 KlassHandle resolved_klass,
953 953 Symbol* method_name,
954 954 Symbol* method_signature,
955 955 KlassHandle current_klass,
956 956 bool check_access) {
957 957 EXCEPTION_MARK;
958 958 methodHandle method_result;
959 959 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
960 960 if (HAS_PENDING_EXCEPTION) {
961 961 CLEAR_PENDING_EXCEPTION;
962 962 return methodHandle();
963 963 } else {
964 964 return method_result;
965 965 }
966 966 }
967 967
968 968 methodHandle LinkResolver::resolve_virtual_call_or_null(
969 969 KlassHandle receiver_klass,
970 970 KlassHandle resolved_klass,
971 971 Symbol* name,
972 972 Symbol* signature,
973 973 KlassHandle current_klass) {
974 974 EXCEPTION_MARK;
975 975 CallInfo info;
976 976 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
977 977 if (HAS_PENDING_EXCEPTION) {
978 978 CLEAR_PENDING_EXCEPTION;
979 979 return methodHandle();
980 980 }
981 981 return info.selected_method();
982 982 }
983 983
984 984 methodHandle LinkResolver::resolve_interface_call_or_null(
985 985 KlassHandle receiver_klass,
986 986 KlassHandle resolved_klass,
987 987 Symbol* name,
988 988 Symbol* signature,
989 989 KlassHandle current_klass) {
990 990 EXCEPTION_MARK;
991 991 CallInfo info;
992 992 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
993 993 if (HAS_PENDING_EXCEPTION) {
994 994 CLEAR_PENDING_EXCEPTION;
995 995 return methodHandle();
996 996 }
997 997 return info.selected_method();
998 998 }
999 999
1000 1000 int LinkResolver::resolve_virtual_vtable_index(
1001 1001 KlassHandle receiver_klass,
1002 1002 KlassHandle resolved_klass,
1003 1003 Symbol* name,
1004 1004 Symbol* signature,
1005 1005 KlassHandle current_klass) {
1006 1006 EXCEPTION_MARK;
1007 1007 CallInfo info;
1008 1008 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1009 1009 if (HAS_PENDING_EXCEPTION) {
1010 1010 CLEAR_PENDING_EXCEPTION;
1011 1011 return methodOopDesc::invalid_vtable_index;
1012 1012 }
1013 1013 return info.vtable_index();
1014 1014 }
1015 1015
1016 1016 methodHandle LinkResolver::resolve_static_call_or_null(
1017 1017 KlassHandle resolved_klass,
1018 1018 Symbol* name,
1019 1019 Symbol* signature,
1020 1020 KlassHandle current_klass) {
1021 1021 EXCEPTION_MARK;
1022 1022 CallInfo info;
1023 1023 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1024 1024 if (HAS_PENDING_EXCEPTION) {
1025 1025 CLEAR_PENDING_EXCEPTION;
1026 1026 return methodHandle();
1027 1027 }
1028 1028 return info.selected_method();
1029 1029 }
1030 1030
1031 1031 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1032 1032 KlassHandle current_klass) {
1033 1033 EXCEPTION_MARK;
1034 1034 CallInfo info;
1035 1035 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1036 1036 if (HAS_PENDING_EXCEPTION) {
1037 1037 CLEAR_PENDING_EXCEPTION;
1038 1038 return methodHandle();
1039 1039 }
1040 1040 return info.selected_method();
1041 1041 }
1042 1042
1043 1043
1044 1044
1045 1045 //------------------------------------------------------------------------------------------------------------------------
1046 1046 // ConstantPool entries
1047 1047
1048 1048 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1049 1049 switch (byte) {
1050 1050 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1051 1051 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1052 1052 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1053 1053 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1054 1054 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1055 1055 }
1056 1056 return;
1057 1057 }
1058 1058
1059 1059 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1060 1060 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1061 1061 // resolve klass
1062 1062 resolve_klass(resolved_klass, pool, index, CHECK);
1063 1063
1064 1064 // Get name, signature, and static klass
1065 1065 method_name = pool->name_ref_at(index);
1066 1066 method_signature = pool->signature_ref_at(index);
1067 1067 current_klass = KlassHandle(THREAD, pool->pool_holder());
1068 1068 }
1069 1069
1070 1070
1071 1071 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1072 1072 KlassHandle resolved_klass;
1073 1073 Symbol* method_name = NULL;
1074 1074 Symbol* method_signature = NULL;
1075 1075 KlassHandle current_klass;
1076 1076 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1077 1077 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1078 1078 }
1079 1079
1080 1080
1081 1081 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1082 1082 KlassHandle resolved_klass;
1083 1083 Symbol* method_name = NULL;
1084 1084 Symbol* method_signature = NULL;
1085 1085 KlassHandle current_klass;
1086 1086 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1087 1087 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1088 1088 }
1089 1089
1090 1090
1091 1091 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1092 1092 constantPoolHandle pool, int index,
1093 1093 TRAPS) {
1094 1094
1095 1095 KlassHandle resolved_klass;
1096 1096 Symbol* method_name = NULL;
1097 1097 Symbol* method_signature = NULL;
1098 1098 KlassHandle current_klass;
1099 1099 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1100 1100 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass());
1101 1101 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1102 1102 }
1103 1103
1104 1104
1105 1105 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1106 1106 KlassHandle resolved_klass;
1107 1107 Symbol* method_name = NULL;
1108 1108 Symbol* method_signature = NULL;
1109 1109 KlassHandle current_klass;
1110 1110 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1111 1111 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass());
1112 1112 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1113 1113 }
1114 1114
1115 1115
1116 1116 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int raw_index, TRAPS) {
1117 1117 assert(EnableInvokeDynamic, "");
1118 1118
1119 1119 // This guy is reached from InterpreterRuntime::resolve_invokedynamic.
1120 1120
1121 1121 // At this point, we only need the signature, and can ignore the name.
1122 1122 Symbol* method_signature = pool->signature_ref_at(raw_index); // raw_index works directly
1123 1123 Symbol* method_name = vmSymbols::invokeExact_name();
1124 1124 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass();
1125 1125
1126 1126 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...)
1127 1127 // The extra MH receiver will be inserted into the stack on every call.
1128 1128 methodHandle resolved_method;
1129 1129 KlassHandle current_klass(THREAD, pool->pool_holder());
1130 1130 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, THREAD);
1131 1131 if (HAS_PENDING_EXCEPTION) {
1132 1132 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1133 1133 // throw these guys, since they are already wrapped
1134 1134 return;
1135 1135 }
1136 1136 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1137 1137 // intercept only LinkageErrors which might have failed to wrap
1138 1138 return;
1139 1139 }
1140 1140 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1141 1141 Handle ex(THREAD, PENDING_EXCEPTION);
1142 1142 CLEAR_PENDING_EXCEPTION;
1143 1143 oop bsme = Klass::cast(SystemDictionary::BootstrapMethodError_klass())->java_mirror();
1144 1144 MethodHandles::raise_exception(Bytecodes::_athrow, ex(), bsme, CHECK);
1145 1145 // java code should not return, but if it does throw out anyway
1146 1146 THROW(vmSymbols::java_lang_InternalError());
1147 1147 }
1148 1148 if (resolved_method.is_null()) {
1149 1149 THROW(vmSymbols::java_lang_InternalError());
1150 1150 }
1151 1151 result.set_dynamic(resolved_method, CHECK);
1152 1152 }
1153 1153
1154 1154 //------------------------------------------------------------------------------------------------------------------------
1155 1155 #ifndef PRODUCT
1156 1156
1157 1157 void FieldAccessInfo::print() {
1158 1158 ResourceMark rm;
1159 1159 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());
1160 1160 }
1161 1161
1162 1162 #endif
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