1 /* 2 * Copyright (c) 1997, 2019, 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 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/javaClasses.inline.hpp" 27 #include "classfile/symbolTable.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/codeCache.hpp" 31 #include "compiler/compilationPolicy.hpp" 32 #include "compiler/compileBroker.hpp" 33 #include "compiler/disassembler.hpp" 34 #include "gc/shared/barrierSetNMethod.hpp" 35 #include "gc/shared/collectedHeap.hpp" 36 #include "interpreter/interpreter.hpp" 37 #include "interpreter/interpreterRuntime.hpp" 38 #include "interpreter/linkResolver.hpp" 39 #include "interpreter/templateTable.hpp" 40 #include "logging/log.hpp" 41 #include "memory/oopFactory.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "memory/universe.hpp" 44 #include "oops/constantPool.hpp" 45 #include "oops/cpCache.inline.hpp" 46 #include "oops/instanceKlass.hpp" 47 #include "oops/methodData.hpp" 48 #include "oops/objArrayKlass.hpp" 49 #include "oops/objArrayOop.inline.hpp" 50 #include "oops/oop.inline.hpp" 51 #include "oops/symbol.hpp" 52 #include "oops/valueArrayKlass.hpp" 53 #include "oops/valueArrayOop.inline.hpp" 54 #include "oops/valueKlass.inline.hpp" 55 #include "prims/jvmtiExport.hpp" 56 #include "prims/nativeLookup.hpp" 57 #include "runtime/atomic.hpp" 58 #include "runtime/biasedLocking.hpp" 59 #include "runtime/deoptimization.hpp" 60 #include "runtime/fieldDescriptor.inline.hpp" 61 #include "runtime/frame.inline.hpp" 62 #include "runtime/handles.inline.hpp" 63 #include "runtime/icache.hpp" 64 #include "runtime/interfaceSupport.inline.hpp" 65 #include "runtime/java.hpp" 66 #include "runtime/javaCalls.hpp" 67 #include "runtime/jfieldIDWorkaround.hpp" 68 #include "runtime/osThread.hpp" 69 #include "runtime/sharedRuntime.hpp" 70 #include "runtime/stubRoutines.hpp" 71 #include "runtime/synchronizer.hpp" 72 #include "runtime/threadCritical.hpp" 73 #include "utilities/align.hpp" 74 #include "utilities/copy.hpp" 75 #include "utilities/events.hpp" 76 #include "utilities/globalDefinitions.hpp" 77 #ifdef COMPILER2 78 #include "opto/runtime.hpp" 79 #endif 80 81 class UnlockFlagSaver { 82 private: 83 JavaThread* _thread; 84 bool _do_not_unlock; 85 public: 86 UnlockFlagSaver(JavaThread* t) { 87 _thread = t; 88 _do_not_unlock = t->do_not_unlock_if_synchronized(); 89 t->set_do_not_unlock_if_synchronized(false); 90 } 91 ~UnlockFlagSaver() { 92 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); 93 } 94 }; 95 96 // Helper class to access current interpreter state 97 class LastFrameAccessor : public StackObj { 98 frame _last_frame; 99 public: 100 LastFrameAccessor(JavaThread* thread) { 101 assert(thread == Thread::current(), "sanity"); 102 _last_frame = thread->last_frame(); 103 } 104 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); } 105 Method* method() const { return _last_frame.interpreter_frame_method(); } 106 address bcp() const { return _last_frame.interpreter_frame_bcp(); } 107 int bci() const { return _last_frame.interpreter_frame_bci(); } 108 address mdp() const { return _last_frame.interpreter_frame_mdp(); } 109 110 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); } 111 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); } 112 113 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272) 114 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); } 115 116 Bytecode bytecode() const { return Bytecode(method(), bcp()); } 117 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); } 118 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); } 119 int get_index_u2_cpcache(Bytecodes::Code bc) const 120 { return bytecode().get_index_u2_cpcache(bc); } 121 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); } 122 int number_of_dimensions() const { return bcp()[3]; } 123 ConstantPoolCacheEntry* cache_entry_at(int i) const 124 { return method()->constants()->cache()->entry_at(i); } 125 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); } 126 127 oop callee_receiver(Symbol* signature) { 128 return _last_frame.interpreter_callee_receiver(signature); 129 } 130 BasicObjectLock* monitor_begin() const { 131 return _last_frame.interpreter_frame_monitor_begin(); 132 } 133 BasicObjectLock* monitor_end() const { 134 return _last_frame.interpreter_frame_monitor_end(); 135 } 136 BasicObjectLock* next_monitor(BasicObjectLock* current) const { 137 return _last_frame.next_monitor_in_interpreter_frame(current); 138 } 139 140 frame& get_frame() { return _last_frame; } 141 }; 142 143 //------------------------------------------------------------------------------------------------------------------------ 144 // State accessors 145 146 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { 147 LastFrameAccessor last_frame(thread); 148 last_frame.set_bcp(bcp); 149 if (ProfileInterpreter) { 150 // ProfileTraps uses MDOs independently of ProfileInterpreter. 151 // That is why we must check both ProfileInterpreter and mdo != NULL. 152 MethodData* mdo = last_frame.method()->method_data(); 153 if (mdo != NULL) { 154 NEEDS_CLEANUP; 155 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci())); 156 } 157 } 158 } 159 160 //------------------------------------------------------------------------------------------------------------------------ 161 // Constants 162 163 164 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) 165 // access constant pool 166 LastFrameAccessor last_frame(thread); 167 ConstantPool* pool = last_frame.method()->constants(); 168 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc); 169 constantTag tag = pool->tag_at(index); 170 171 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 172 Klass* klass = pool->klass_at(index, CHECK); 173 oop java_class = klass->java_mirror(); 174 thread->set_vm_result(java_class); 175 JRT_END 176 177 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { 178 assert(bytecode == Bytecodes::_ldc || 179 bytecode == Bytecodes::_ldc_w || 180 bytecode == Bytecodes::_ldc2_w || 181 bytecode == Bytecodes::_fast_aldc || 182 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 183 ResourceMark rm(thread); 184 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc || 185 bytecode == Bytecodes::_fast_aldc_w); 186 LastFrameAccessor last_frame(thread); 187 methodHandle m (thread, last_frame.method()); 188 Bytecode_loadconstant ldc(m, last_frame.bci()); 189 190 // Double-check the size. (Condy can have any type.) 191 BasicType type = ldc.result_type(); 192 switch (type2size[type]) { 193 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break; 194 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break; 195 default: ShouldNotReachHere(); 196 } 197 198 // Resolve the constant. This does not do unboxing. 199 // But it does replace Universe::the_null_sentinel by null. 200 oop result = ldc.resolve_constant(CHECK); 201 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc"); 202 203 #ifdef ASSERT 204 { 205 // The bytecode wrappers aren't GC-safe so construct a new one 206 Bytecode_loadconstant ldc2(m, last_frame.bci()); 207 int rindex = ldc2.cache_index(); 208 if (rindex < 0) 209 rindex = m->constants()->cp_to_object_index(ldc2.pool_index()); 210 if (rindex >= 0) { 211 oop coop = m->constants()->resolved_references()->obj_at(rindex); 212 oop roop = (result == NULL ? Universe::the_null_sentinel() : result); 213 assert(roop == coop, "expected result for assembly code"); 214 } 215 } 216 #endif 217 thread->set_vm_result(result); 218 if (!is_fast_aldc) { 219 // Tell the interpreter how to unbox the primitive. 220 guarantee(java_lang_boxing_object::is_instance(result, type), ""); 221 int offset = java_lang_boxing_object::value_offset_in_bytes(type); 222 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift) 223 | (offset & ConstantPoolCacheEntry::field_index_mask)); 224 thread->set_vm_result_2((Metadata*)flags); 225 } 226 } 227 JRT_END 228 229 230 //------------------------------------------------------------------------------------------------------------------------ 231 // Allocation 232 233 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) 234 Klass* k = pool->klass_at(index, CHECK); 235 InstanceKlass* klass = InstanceKlass::cast(k); 236 237 // Make sure we are not instantiating an abstract klass 238 klass->check_valid_for_instantiation(true, CHECK); 239 240 // Make sure klass is initialized 241 klass->initialize(CHECK); 242 243 // At this point the class may not be fully initialized 244 // because of recursive initialization. If it is fully 245 // initialized & has_finalized is not set, we rewrite 246 // it into its fast version (Note: no locking is needed 247 // here since this is an atomic byte write and can be 248 // done more than once). 249 // 250 // Note: In case of classes with has_finalized we don't 251 // rewrite since that saves us an extra check in 252 // the fast version which then would call the 253 // slow version anyway (and do a call back into 254 // Java). 255 // If we have a breakpoint, then we don't rewrite 256 // because the _breakpoint bytecode would be lost. 257 oop obj = klass->allocate_instance(CHECK); 258 thread->set_vm_result(obj); 259 JRT_END 260 261 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) { 262 switch (type) { 263 case T_BOOLEAN: 264 instance()->bool_field_put(offset, (jboolean)*((int*)addr)); 265 break; 266 case T_CHAR: 267 instance()->char_field_put(offset, (jchar) *((int*)addr)); 268 break; 269 case T_FLOAT: 270 instance()->float_field_put(offset, (jfloat)*((float*)addr)); 271 break; 272 case T_DOUBLE: 273 instance()->double_field_put(offset, (jdouble)*((double*)addr)); 274 break; 275 case T_BYTE: 276 instance()->byte_field_put(offset, (jbyte)*((int*)addr)); 277 break; 278 case T_SHORT: 279 instance()->short_field_put(offset, (jshort)*((int*)addr)); 280 break; 281 case T_INT: 282 instance()->int_field_put(offset, (jint)*((int*)addr)); 283 break; 284 case T_LONG: 285 instance()->long_field_put(offset, (jlong)*((long long*)addr)); 286 break; 287 case T_OBJECT: 288 case T_ARRAY: 289 case T_VALUETYPE: 290 fatal("Should not be handled with this method"); 291 break; 292 default: 293 fatal("Unsupported BasicType"); 294 } 295 } 296 297 JRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* thread, ConstantPool* pool, int index)) 298 // Getting the ValueKlass 299 Klass* k = pool->klass_at(index, CHECK); 300 assert(k->is_value(), "defaultvalue argument must be the value type class"); 301 ValueKlass* vklass = ValueKlass::cast(k); 302 303 vklass->initialize(THREAD); 304 oop res = vklass->default_value(); 305 thread->set_vm_result(res); 306 JRT_END 307 308 JRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* thread, ConstantPoolCache* cp_cache)) 309 LastFrameAccessor last_frame(thread); 310 // Getting the ValueKlass 311 int index = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_withfield)); 312 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index); 313 assert(cp_entry->is_resolved(Bytecodes::_withfield), "Should have been resolved"); 314 Klass* klass = cp_entry->f1_as_klass(); 315 assert(klass->is_value(), "withfield only applies to value types"); 316 ValueKlass* vklass = ValueKlass::cast(klass); 317 318 // Getting Field information 319 int offset = cp_entry->f2_as_index(); 320 int field_index = cp_entry->field_index(); 321 int field_offset = cp_entry->f2_as_offset(); 322 Symbol* field_signature = vklass->field_signature(field_index); 323 ResourceMark rm(THREAD); 324 const char* signature = (const char *) field_signature->as_utf8(); 325 BasicType field_type = char2type(signature[0]); 326 int return_offset = (type2size[field_type] + type2size[T_OBJECT]) * AbstractInterpreter::stackElementSize; 327 328 // Getting old value 329 frame& f = last_frame.get_frame(); 330 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1; 331 int vt_offset = type2size[field_type]; 332 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset); 333 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver"); 334 Handle old_value_h(THREAD, old_value); 335 336 // Creating new value by copying the one passed in argument 337 instanceOop new_value = vklass->allocate_instance( 338 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize)); 339 Handle new_value_h = Handle(THREAD, new_value); 340 vklass->value_copy_oop_to_new_oop(old_value_h(), new_value_h()); 341 342 // Updating the field specified in arguments 343 if (field_type == T_ARRAY || field_type == T_OBJECT) { 344 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx); 345 assert(aoop == NULL || oopDesc::is_oop(aoop),"argument must be a reference type"); 346 new_value_h()->obj_field_put(field_offset, aoop); 347 } else if (field_type == T_VALUETYPE) { 348 if (cp_entry->is_flattened()) { 349 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx); 350 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type"); 351 ValueKlass* field_vk = ValueKlass::cast(vklass->get_value_field_klass(field_index)); 352 assert(vt_oop != NULL && field_vk == vt_oop->klass(), "Must match"); 353 field_vk->write_flattened_field(new_value_h(), offset, vt_oop, CHECK_(return_offset)); 354 } else { // not flattened 355 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx); 356 if (voop == NULL && cp_entry->is_flattenable()) { 357 THROW_(vmSymbols::java_lang_NullPointerException(), return_offset); 358 } 359 assert(voop == NULL || oopDesc::is_oop(voop),"checking argument"); 360 new_value_h()->obj_field_put(field_offset, voop); 361 } 362 } else { // not T_OBJECT nor T_ARRAY nor T_VALUETYPE 363 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx); 364 copy_primitive_argument(addr, new_value_h, field_offset, field_type); 365 } 366 367 // returning result 368 thread->set_vm_result(new_value_h()); 369 return return_offset; 370 JRT_END 371 372 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_value_field(JavaThread* thread, oopDesc* mirror, int index)) 373 // The interpreter tries to access a flattenable static field that has not been initialized. 374 // This situation can happen in different scenarios: 375 // 1 - if the load or initialization of the field failed during step 8 of 376 // the initialization of the holder of the field, in this case the access to the field 377 // must fail 378 // 2 - it can also happen when the initialization of the holder class triggered the initialization of 379 // another class which accesses this field in its static initializer, in this case the 380 // access must succeed to allow circularity 381 // The code below tries to load and initialize the field's class again before returning the default value. 382 // If the field was not initialized because of an error, a exception should be thrown. 383 // If the class is being initialized, the default value is returned. 384 instanceHandle mirror_h(THREAD, (instanceOop)mirror); 385 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 386 if (klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD)) { 387 int offset = klass->field_offset(index); 388 Klass* field_k = klass->get_value_field_klass_or_null(index); 389 if (field_k == NULL) { 390 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD), 391 Handle(THREAD, klass->class_loader()), 392 Handle(THREAD, klass->protection_domain()), 393 true, CHECK); 394 assert(field_k != NULL, "Should have been loaded or an exception thrown above"); 395 klass->set_value_field_klass(index, field_k); 396 } 397 field_k->initialize(CHECK); 398 oop defaultvalue = ValueKlass::cast(field_k)->default_value(); 399 // It is safe to initialized the static field because 1) the current thread is the initializing thread 400 // and is the only one that can access it, and 2) the field is actually not initialized (i.e. null) 401 // otherwise the JVM should not be executing this code. 402 mirror->obj_field_put(offset, defaultvalue); 403 thread->set_vm_result(defaultvalue); 404 } else { 405 assert(klass->is_in_error_state(), "If not initializing, initialization must have failed to get there"); 406 ResourceMark rm(THREAD); 407 const char* desc = "Could not initialize class "; 408 const char* className = klass->external_name(); 409 size_t msglen = strlen(desc) + strlen(className) + 1; 410 char* message = NEW_RESOURCE_ARRAY(char, msglen); 411 if (NULL == message) { 412 // Out of memory: can't create detailed error message 413 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); 414 } else { 415 jio_snprintf(message, msglen, "%s%s", desc, className); 416 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); 417 } 418 } 419 JRT_END 420 421 JRT_ENTRY(void, InterpreterRuntime::uninitialized_instance_value_field(JavaThread* thread, oopDesc* obj, int index)) 422 instanceHandle obj_h(THREAD, (instanceOop)obj); 423 InstanceKlass* klass = InstanceKlass::cast(obj_h()->klass()); 424 Klass* field_k = klass->get_value_field_klass_or_null(index); 425 assert(field_k != NULL, "Must have been initialized"); 426 ValueKlass* field_vklass = ValueKlass::cast(field_k); 427 assert(field_vklass->is_initialized(), "Must have been initialized at this point"); 428 instanceOop res = (instanceOop)field_vklass->default_value(); 429 thread->set_vm_result(res); 430 JRT_END 431 432 JRT_ENTRY(void, InterpreterRuntime::read_flattened_field(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder)) 433 Handle obj_h(THREAD, obj); 434 435 assert(oopDesc::is_oop(obj), "Sanity check"); 436 437 assert(field_holder->is_instance_klass(), "Sanity check"); 438 InstanceKlass* klass = InstanceKlass::cast(field_holder); 439 440 assert(klass->field_is_flattened(index), "Sanity check"); 441 442 ValueKlass* field_vklass = ValueKlass::cast(klass->get_value_field_klass(index)); 443 assert(field_vklass->is_initialized(), "Must be initialized at this point"); 444 445 oop res = field_vklass->read_flattened_field(obj_h(), klass->field_offset(index), CHECK); 446 thread->set_vm_result(res); 447 JRT_END 448 449 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) 450 oop obj = oopFactory::new_typeArray(type, size, CHECK); 451 thread->set_vm_result(obj); 452 JRT_END 453 454 455 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) 456 Klass* klass = pool->klass_at(index, CHECK); 457 bool is_qtype_desc = pool->tag_at(index).is_Qdescriptor_klass(); 458 arrayOop obj; 459 if ((!klass->is_array_klass()) && is_qtype_desc) { // Logically creates elements, ensure klass init 460 klass->initialize(CHECK); 461 obj = oopFactory::new_valueArray(klass, size, CHECK); 462 } else { 463 obj = oopFactory::new_objArray(klass, size, CHECK); 464 } 465 thread->set_vm_result(obj); 466 JRT_END 467 468 JRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index)) 469 valueArrayHandle vah(thread, (valueArrayOop)array); 470 oop value_holder = valueArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK); 471 thread->set_vm_result(value_holder); 472 JRT_END 473 474 JRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, void* val, arrayOopDesc* array, int index)) 475 assert(val != NULL, "can't store null into flat array"); 476 ((valueArrayOop)array)->value_copy_to_index((oop)val, index); 477 JRT_END 478 479 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) 480 // We may want to pass in more arguments - could make this slightly faster 481 LastFrameAccessor last_frame(thread); 482 ConstantPool* constants = last_frame.method()->constants(); 483 int i = last_frame.get_index_u2(Bytecodes::_multianewarray); 484 Klass* klass = constants->klass_at(i, CHECK); 485 bool is_qtype = klass->name()->is_Q_array_signature(); 486 int nof_dims = last_frame.number_of_dimensions(); 487 assert(klass->is_klass(), "not a class"); 488 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 489 490 if (is_qtype) { // Logically creates elements, ensure klass init 491 klass->initialize(CHECK); 492 } 493 494 // We must create an array of jints to pass to multi_allocate. 495 ResourceMark rm(thread); 496 const int small_dims = 10; 497 jint dim_array[small_dims]; 498 jint *dims = &dim_array[0]; 499 if (nof_dims > small_dims) { 500 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 501 } 502 for (int index = 0; index < nof_dims; index++) { 503 // offset from first_size_address is addressed as local[index] 504 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 505 dims[index] = first_size_address[n]; 506 } 507 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 508 thread->set_vm_result(obj); 509 JRT_END 510 511 512 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) 513 assert(oopDesc::is_oop(obj), "must be a valid oop"); 514 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 515 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 516 JRT_END 517 518 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* thread, oopDesc* aobj, oopDesc* bobj)) 519 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops"); 520 521 Handle ha(THREAD, aobj); 522 Handle hb(THREAD, bobj); 523 JavaValue result(T_BOOLEAN); 524 JavaCallArguments args; 525 args.push_oop(ha); 526 args.push_oop(hb); 527 methodHandle method(thread, Universe::is_substitutable_method()); 528 JavaCalls::call(&result, method, &args, THREAD); 529 if (HAS_PENDING_EXCEPTION) { 530 // Something really bad happened because isSubstitutable() should not throw exceptions 531 // If it is an error, just let it propagate 532 // If it is an exception, wrap it into an InternalError 533 if (!PENDING_EXCEPTION->is_a(SystemDictionary::Error_klass())) { 534 Handle e(THREAD, PENDING_EXCEPTION); 535 CLEAR_PENDING_EXCEPTION; 536 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false); 537 } 538 } 539 return result.get_jboolean(); 540 JRT_END 541 542 // Quicken instance-of and check-cast bytecodes 543 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) 544 // Force resolving; quicken the bytecode 545 LastFrameAccessor last_frame(thread); 546 int which = last_frame.get_index_u2(Bytecodes::_checkcast); 547 ConstantPool* cpool = last_frame.method()->constants(); 548 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 549 // program we might have seen an unquick'd bytecode in the interpreter but have another 550 // thread quicken the bytecode before we get here. 551 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 552 Klass* klass = cpool->klass_at(which, CHECK); 553 thread->set_vm_result_2(klass); 554 JRT_END 555 556 557 //------------------------------------------------------------------------------------------------------------------------ 558 // Exceptions 559 560 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, 561 const methodHandle& trap_method, int trap_bci, TRAPS) { 562 if (trap_method.not_null()) { 563 MethodData* trap_mdo = trap_method->method_data(); 564 if (trap_mdo == NULL) { 565 Method::build_interpreter_method_data(trap_method, THREAD); 566 if (HAS_PENDING_EXCEPTION) { 567 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), 568 "we expect only an OOM error here"); 569 CLEAR_PENDING_EXCEPTION; 570 } 571 trap_mdo = trap_method->method_data(); 572 // and fall through... 573 } 574 if (trap_mdo != NULL) { 575 // Update per-method count of trap events. The interpreter 576 // is updating the MDO to simulate the effect of compiler traps. 577 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 578 } 579 } 580 } 581 582 // Assume the compiler is (or will be) interested in this event. 583 // If necessary, create an MDO to hold the information, and record it. 584 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { 585 assert(ProfileTraps, "call me only if profiling"); 586 LastFrameAccessor last_frame(thread); 587 methodHandle trap_method(thread, last_frame.method()); 588 int trap_bci = trap_method->bci_from(last_frame.bcp()); 589 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 590 } 591 592 #ifdef CC_INTERP 593 // As legacy note_trap, but we have more arguments. 594 JRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) 595 methodHandle trap_method(thread, method); 596 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); 597 JRT_END 598 599 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper 600 // for each exception. 601 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) 602 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } 603 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) 604 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } 605 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) 606 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } 607 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) 608 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } 609 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) 610 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } 611 #endif // CC_INTERP 612 613 614 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 615 // get klass 616 InstanceKlass* klass = InstanceKlass::cast(k); 617 assert(klass->is_initialized(), 618 "this klass should have been initialized during VM initialization"); 619 // create instance - do not call constructor since we may have no 620 // (java) stack space left (should assert constructor is empty) 621 Handle exception; 622 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 623 exception = Handle(THREAD, exception_oop); 624 if (StackTraceInThrowable) { 625 java_lang_Throwable::fill_in_stack_trace(exception); 626 } 627 return exception; 628 } 629 630 // Special handling for stack overflow: since we don't have any (java) stack 631 // space left we use the pre-allocated & pre-initialized StackOverflowError 632 // klass to create an stack overflow error instance. We do not call its 633 // constructor for the same reason (it is empty, anyway). 634 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) 635 Handle exception = get_preinitialized_exception( 636 SystemDictionary::StackOverflowError_klass(), 637 CHECK); 638 // Increment counter for hs_err file reporting 639 Atomic::inc(&Exceptions::_stack_overflow_errors); 640 THROW_HANDLE(exception); 641 JRT_END 642 643 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread)) 644 Handle exception = get_preinitialized_exception( 645 SystemDictionary::StackOverflowError_klass(), 646 CHECK); 647 java_lang_Throwable::set_message(exception(), 648 Universe::delayed_stack_overflow_error_message()); 649 // Increment counter for hs_err file reporting 650 Atomic::inc(&Exceptions::_stack_overflow_errors); 651 THROW_HANDLE(exception); 652 JRT_END 653 654 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) 655 // lookup exception klass 656 TempNewSymbol s = SymbolTable::new_symbol(name); 657 if (ProfileTraps) { 658 if (s == vmSymbols::java_lang_ArithmeticException()) { 659 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); 660 } else if (s == vmSymbols::java_lang_NullPointerException()) { 661 note_trap(thread, Deoptimization::Reason_null_check, CHECK); 662 } 663 } 664 // create exception 665 Handle exception = Exceptions::new_exception(thread, s, message); 666 thread->set_vm_result(exception()); 667 JRT_END 668 669 670 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) 671 // Produce the error message first because note_trap can safepoint 672 ResourceMark rm(thread); 673 const char* klass_name = obj->klass()->external_name(); 674 // lookup exception klass 675 TempNewSymbol s = SymbolTable::new_symbol(name); 676 if (ProfileTraps) { 677 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 678 } 679 // create exception, with klass name as detail message 680 Handle exception = Exceptions::new_exception(thread, s, klass_name); 681 thread->set_vm_result(exception()); 682 JRT_END 683 684 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, arrayOopDesc* a, jint index)) 685 // Produce the error message first because note_trap can safepoint 686 ResourceMark rm(thread); 687 stringStream ss; 688 ss.print("Index %d out of bounds for length %d", index, a->length()); 689 690 if (ProfileTraps) { 691 note_trap(thread, Deoptimization::Reason_range_check, CHECK); 692 } 693 694 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 695 JRT_END 696 697 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 698 JavaThread* thread, oopDesc* obj)) 699 700 // Produce the error message first because note_trap can safepoint 701 ResourceMark rm(thread); 702 char* message = SharedRuntime::generate_class_cast_message( 703 thread, obj->klass()); 704 705 if (ProfileTraps) { 706 note_trap(thread, Deoptimization::Reason_class_check, CHECK); 707 } 708 709 // create exception 710 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 711 JRT_END 712 713 // exception_handler_for_exception(...) returns the continuation address, 714 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 715 // The exception oop is returned to make sure it is preserved over GC (it 716 // is only on the stack if the exception was thrown explicitly via athrow). 717 // During this operation, the expression stack contains the values for the 718 // bci where the exception happened. If the exception was propagated back 719 // from a call, the expression stack contains the values for the bci at the 720 // invoke w/o arguments (i.e., as if one were inside the call). 721 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) 722 723 LastFrameAccessor last_frame(thread); 724 Handle h_exception(thread, exception); 725 methodHandle h_method (thread, last_frame.method()); 726 constantPoolHandle h_constants(thread, h_method->constants()); 727 bool should_repeat; 728 int handler_bci; 729 int current_bci = last_frame.bci(); 730 731 if (thread->frames_to_pop_failed_realloc() > 0) { 732 // Allocation of scalar replaced object used in this frame 733 // failed. Unconditionally pop the frame. 734 thread->dec_frames_to_pop_failed_realloc(); 735 thread->set_vm_result(h_exception()); 736 // If the method is synchronized we already unlocked the monitor 737 // during deoptimization so the interpreter needs to skip it when 738 // the frame is popped. 739 thread->set_do_not_unlock_if_synchronized(true); 740 #ifdef CC_INTERP 741 return (address) -1; 742 #else 743 return Interpreter::remove_activation_entry(); 744 #endif 745 } 746 747 // Need to do this check first since when _do_not_unlock_if_synchronized 748 // is set, we don't want to trigger any classloading which may make calls 749 // into java, or surprisingly find a matching exception handler for bci 0 750 // since at this moment the method hasn't been "officially" entered yet. 751 if (thread->do_not_unlock_if_synchronized()) { 752 ResourceMark rm; 753 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 754 thread->set_vm_result(exception); 755 #ifdef CC_INTERP 756 return (address) -1; 757 #else 758 return Interpreter::remove_activation_entry(); 759 #endif 760 } 761 762 do { 763 should_repeat = false; 764 765 // assertions 766 #ifdef ASSERT 767 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 768 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError 769 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { 770 if (ExitVMOnVerifyError) vm_exit(-1); 771 ShouldNotReachHere(); 772 } 773 #endif 774 775 // tracing 776 if (log_is_enabled(Info, exceptions)) { 777 ResourceMark rm(thread); 778 stringStream tempst; 779 tempst.print("interpreter method <%s>\n" 780 " at bci %d for thread " INTPTR_FORMAT " (%s)", 781 h_method->print_value_string(), current_bci, p2i(thread), thread->name()); 782 Exceptions::log_exception(h_exception, tempst.as_string()); 783 } 784 // Don't go paging in something which won't be used. 785 // else if (extable->length() == 0) { 786 // // disabled for now - interpreter is not using shortcut yet 787 // // (shortcut is not to call runtime if we have no exception handlers) 788 // // warning("performance bug: should not call runtime if method has no exception handlers"); 789 // } 790 // for AbortVMOnException flag 791 Exceptions::debug_check_abort(h_exception); 792 793 // exception handler lookup 794 Klass* klass = h_exception->klass(); 795 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD); 796 if (HAS_PENDING_EXCEPTION) { 797 // We threw an exception while trying to find the exception handler. 798 // Transfer the new exception to the exception handle which will 799 // be set into thread local storage, and do another lookup for an 800 // exception handler for this exception, this time starting at the 801 // BCI of the exception handler which caused the exception to be 802 // thrown (bug 4307310). 803 h_exception = Handle(THREAD, PENDING_EXCEPTION); 804 CLEAR_PENDING_EXCEPTION; 805 if (handler_bci >= 0) { 806 current_bci = handler_bci; 807 should_repeat = true; 808 } 809 } 810 } while (should_repeat == true); 811 812 #if INCLUDE_JVMCI 813 if (EnableJVMCI && h_method->method_data() != NULL) { 814 ResourceMark rm(thread); 815 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL); 816 if (pdata != NULL && pdata->is_BitData()) { 817 BitData* bit_data = (BitData*) pdata; 818 bit_data->set_exception_seen(); 819 } 820 } 821 #endif 822 823 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 824 // time throw or a stack unwinding throw and accordingly notify the debugger 825 if (JvmtiExport::can_post_on_exceptions()) { 826 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception()); 827 } 828 829 #ifdef CC_INTERP 830 address continuation = (address)(intptr_t) handler_bci; 831 #else 832 address continuation = NULL; 833 #endif 834 address handler_pc = NULL; 835 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { 836 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 837 // handler in this method, or (b) after a stack overflow there is not yet 838 // enough stack space available to reprotect the stack. 839 #ifndef CC_INTERP 840 continuation = Interpreter::remove_activation_entry(); 841 #endif 842 #if COMPILER2_OR_JVMCI 843 // Count this for compilation purposes 844 h_method->interpreter_throwout_increment(THREAD); 845 #endif 846 } else { 847 // handler in this method => change bci/bcp to handler bci/bcp and continue there 848 handler_pc = h_method->code_base() + handler_bci; 849 #ifndef CC_INTERP 850 set_bcp_and_mdp(handler_pc, thread); 851 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 852 #endif 853 } 854 // notify debugger of an exception catch 855 // (this is good for exceptions caught in native methods as well) 856 if (JvmtiExport::can_post_on_exceptions()) { 857 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 858 } 859 860 thread->set_vm_result(h_exception()); 861 return continuation; 862 JRT_END 863 864 865 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) 866 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); 867 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 868 JRT_END 869 870 871 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) 872 THROW(vmSymbols::java_lang_AbstractMethodError()); 873 JRT_END 874 875 // This method is called from the "abstract_entry" of the interpreter. 876 // At that point, the arguments have already been removed from the stack 877 // and therefore we don't have the receiver object at our fingertips. (Though, 878 // on some platforms the receiver still resides in a register...). Thus, 879 // we have no choice but print an error message not containing the receiver 880 // type. 881 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* thread, 882 Method* missingMethod)) 883 ResourceMark rm(thread); 884 assert(missingMethod != NULL, "sanity"); 885 methodHandle m(thread, missingMethod); 886 LinkResolver::throw_abstract_method_error(m, THREAD); 887 JRT_END 888 889 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* thread, 890 Klass* recvKlass, 891 Method* missingMethod)) 892 ResourceMark rm(thread); 893 methodHandle mh = methodHandle(thread, missingMethod); 894 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD); 895 JRT_END 896 897 898 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) 899 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 900 JRT_END 901 902 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* thread, 903 Klass* recvKlass, 904 Klass* interfaceKlass)) 905 ResourceMark rm(thread); 906 char buf[1000]; 907 buf[0] = '\0'; 908 jio_snprintf(buf, sizeof(buf), 909 "Class %s does not implement the requested interface %s", 910 recvKlass ? recvKlass->external_name() : "NULL", 911 interfaceKlass ? interfaceKlass->external_name() : "NULL"); 912 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 913 JRT_END 914 915 //------------------------------------------------------------------------------------------------------------------------ 916 // Fields 917 // 918 919 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) { 920 Thread* THREAD = thread; 921 // resolve field 922 fieldDescriptor info; 923 LastFrameAccessor last_frame(thread); 924 constantPoolHandle pool(thread, last_frame.method()->constants()); 925 methodHandle m(thread, last_frame.method()); 926 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 927 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield); 928 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 929 bool is_value = bytecode == Bytecodes::_withfield; 930 931 { 932 JvmtiHideSingleStepping jhss(thread); 933 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode), 934 m, bytecode, CHECK); 935 } // end JvmtiHideSingleStepping 936 937 // check if link resolution caused cpCache to be updated 938 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 939 if (cp_cache_entry->is_resolved(bytecode)) return; 940 941 // compute auxiliary field attributes 942 TosState state = as_TosState(info.field_type()); 943 944 // Resolution of put instructions on final fields is delayed. That is required so that 945 // exceptions are thrown at the correct place (when the instruction is actually invoked). 946 // If we do not resolve an instruction in the current pass, leaving the put_code 947 // set to zero will cause the next put instruction to the same field to reresolve. 948 949 // Resolution of put instructions to final instance fields with invalid updates (i.e., 950 // to final instance fields with updates originating from a method different than <init>) 951 // is inhibited. A putfield instruction targeting an instance final field must throw 952 // an IllegalAccessError if the instruction is not in an instance 953 // initializer method <init>. If resolution were not inhibited, a putfield 954 // in an initializer method could be resolved in the initializer. Subsequent 955 // putfield instructions to the same field would then use cached information. 956 // As a result, those instructions would not pass through the VM. That is, 957 // checks in resolve_field_access() would not be executed for those instructions 958 // and the required IllegalAccessError would not be thrown. 959 // 960 // Also, we need to delay resolving getstatic and putstatic instructions until the 961 // class is initialized. This is required so that access to the static 962 // field will call the initialization function every time until the class 963 // is completely initialized ala. in 2.17.5 in JVM Specification. 964 InstanceKlass* klass = info.field_holder(); 965 bool uninitialized_static = is_static && !klass->is_initialized(); 966 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 && 967 info.has_initialized_final_update(); 968 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final"); 969 970 Bytecodes::Code get_code = (Bytecodes::Code)0; 971 Bytecodes::Code put_code = (Bytecodes::Code)0; 972 if (!uninitialized_static) { 973 if (is_static) { 974 get_code = Bytecodes::_getstatic; 975 } else { 976 get_code = Bytecodes::_getfield; 977 } 978 if (is_put && is_value) { 979 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield); 980 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) { 981 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 982 } 983 } 984 985 cp_cache_entry->set_field( 986 get_code, 987 put_code, 988 info.field_holder(), 989 info.index(), 990 info.offset(), 991 state, 992 info.access_flags().is_final(), 993 info.access_flags().is_volatile(), 994 info.is_flattened(), 995 info.is_flattenable(), 996 pool->pool_holder() 997 ); 998 } 999 1000 1001 //------------------------------------------------------------------------------------------------------------------------ 1002 // Synchronization 1003 // 1004 // The interpreter's synchronization code is factored out so that it can 1005 // be shared by method invocation and synchronized blocks. 1006 //%note synchronization_3 1007 1008 //%note monitor_1 1009 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) 1010 #ifdef ASSERT 1011 thread->last_frame().interpreter_frame_verify_monitor(elem); 1012 #endif 1013 if (PrintBiasedLockingStatistics) { 1014 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); 1015 } 1016 Handle h_obj(thread, elem->obj()); 1017 assert(Universe::heap()->is_in_or_null(h_obj()), 1018 "must be NULL or an object"); 1019 ObjectSynchronizer::enter(h_obj, elem->lock(), CHECK); 1020 assert(Universe::heap()->is_in_or_null(elem->obj()), 1021 "must be NULL or an object"); 1022 #ifdef ASSERT 1023 thread->last_frame().interpreter_frame_verify_monitor(elem); 1024 #endif 1025 JRT_END 1026 1027 1028 //%note monitor_1 1029 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) 1030 #ifdef ASSERT 1031 thread->last_frame().interpreter_frame_verify_monitor(elem); 1032 #endif 1033 Handle h_obj(thread, elem->obj()); 1034 assert(Universe::heap()->is_in_or_null(h_obj()), 1035 "must be NULL or an object"); 1036 if (elem == NULL || h_obj()->is_unlocked()) { 1037 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 1038 } 1039 ObjectSynchronizer::exit(h_obj(), elem->lock(), thread); 1040 // Free entry. This must be done here, since a pending exception might be installed on 1041 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. 1042 elem->set_obj(NULL); 1043 #ifdef ASSERT 1044 thread->last_frame().interpreter_frame_verify_monitor(elem); 1045 #endif 1046 JRT_END 1047 1048 1049 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) 1050 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 1051 JRT_END 1052 1053 1054 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) 1055 // Returns an illegal exception to install into the current thread. The 1056 // pending_exception flag is cleared so normal exception handling does not 1057 // trigger. Any current installed exception will be overwritten. This 1058 // method will be called during an exception unwind. 1059 1060 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 1061 Handle exception(thread, thread->vm_result()); 1062 assert(exception() != NULL, "vm result should be set"); 1063 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 1064 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { 1065 exception = get_preinitialized_exception( 1066 SystemDictionary::IllegalMonitorStateException_klass(), 1067 CATCH); 1068 } 1069 thread->set_vm_result(exception()); 1070 JRT_END 1071 1072 1073 //------------------------------------------------------------------------------------------------------------------------ 1074 // Invokes 1075 1076 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) 1077 return method->orig_bytecode_at(method->bci_from(bcp)); 1078 JRT_END 1079 1080 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) 1081 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 1082 JRT_END 1083 1084 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) 1085 JvmtiExport::post_raw_breakpoint(thread, method, bcp); 1086 JRT_END 1087 1088 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) { 1089 Thread* THREAD = thread; 1090 LastFrameAccessor last_frame(thread); 1091 // extract receiver from the outgoing argument list if necessary 1092 Handle receiver(thread, NULL); 1093 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface || 1094 bytecode == Bytecodes::_invokespecial) { 1095 ResourceMark rm(thread); 1096 methodHandle m (thread, last_frame.method()); 1097 Bytecode_invoke call(m, last_frame.bci()); 1098 Symbol* signature = call.signature(); 1099 receiver = Handle(thread, last_frame.callee_receiver(signature)); 1100 1101 assert(Universe::heap()->is_in_or_null(receiver()), 1102 "sanity check"); 1103 assert(receiver.is_null() || 1104 !Universe::heap()->is_in(receiver->klass()), 1105 "sanity check"); 1106 } 1107 1108 // resolve method 1109 CallInfo info; 1110 constantPoolHandle pool(thread, last_frame.method()->constants()); 1111 1112 { 1113 JvmtiHideSingleStepping jhss(thread); 1114 LinkResolver::resolve_invoke(info, receiver, pool, 1115 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1116 CHECK); 1117 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 1118 int retry_count = 0; 1119 while (info.resolved_method()->is_old()) { 1120 // It is very unlikely that method is redefined more than 100 times 1121 // in the middle of resolve. If it is looping here more than 100 times 1122 // means then there could be a bug here. 1123 guarantee((retry_count++ < 100), 1124 "Could not resolve to latest version of redefined method"); 1125 // method is redefined in the middle of resolve so re-try. 1126 LinkResolver::resolve_invoke(info, receiver, pool, 1127 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1128 CHECK); 1129 } 1130 } 1131 } // end JvmtiHideSingleStepping 1132 1133 // check if link resolution caused cpCache to be updated 1134 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 1135 if (cp_cache_entry->is_resolved(bytecode)) return; 1136 1137 #ifdef ASSERT 1138 if (bytecode == Bytecodes::_invokeinterface) { 1139 if (info.resolved_method()->method_holder() == 1140 SystemDictionary::Object_klass()) { 1141 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 1142 // (see also CallInfo::set_interface for details) 1143 assert(info.call_kind() == CallInfo::vtable_call || 1144 info.call_kind() == CallInfo::direct_call, ""); 1145 Method* rm = info.resolved_method(); 1146 assert(rm->is_final() || info.has_vtable_index(), 1147 "should have been set already"); 1148 } else if (!info.resolved_method()->has_itable_index()) { 1149 // Resolved something like CharSequence.toString. Use vtable not itable. 1150 assert(info.call_kind() != CallInfo::itable_call, ""); 1151 } else { 1152 // Setup itable entry 1153 assert(info.call_kind() == CallInfo::itable_call, ""); 1154 int index = info.resolved_method()->itable_index(); 1155 assert(info.itable_index() == index, ""); 1156 } 1157 } else if (bytecode == Bytecodes::_invokespecial) { 1158 assert(info.call_kind() == CallInfo::direct_call, "must be direct call"); 1159 } else { 1160 assert(info.call_kind() == CallInfo::direct_call || 1161 info.call_kind() == CallInfo::vtable_call, ""); 1162 } 1163 #endif 1164 // Get sender or sender's unsafe_anonymous_host, and only set cpCache entry to resolved if 1165 // it is not an interface. The receiver for invokespecial calls within interface 1166 // methods must be checked for every call. 1167 InstanceKlass* sender = pool->pool_holder(); 1168 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender; 1169 methodHandle resolved_method(THREAD, info.resolved_method()); 1170 1171 switch (info.call_kind()) { 1172 case CallInfo::direct_call: 1173 cp_cache_entry->set_direct_call( 1174 bytecode, 1175 resolved_method, 1176 sender->is_interface()); 1177 break; 1178 case CallInfo::vtable_call: 1179 cp_cache_entry->set_vtable_call( 1180 bytecode, 1181 resolved_method, 1182 info.vtable_index()); 1183 break; 1184 case CallInfo::itable_call: 1185 cp_cache_entry->set_itable_call( 1186 bytecode, 1187 info.resolved_klass(), 1188 resolved_method, 1189 info.itable_index()); 1190 break; 1191 default: ShouldNotReachHere(); 1192 } 1193 } 1194 1195 1196 // First time execution: Resolve symbols, create a permanent MethodType object. 1197 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { 1198 Thread* THREAD = thread; 1199 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 1200 LastFrameAccessor last_frame(thread); 1201 1202 // resolve method 1203 CallInfo info; 1204 constantPoolHandle pool(thread, last_frame.method()->constants()); 1205 { 1206 JvmtiHideSingleStepping jhss(thread); 1207 LinkResolver::resolve_invoke(info, Handle(), pool, 1208 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1209 CHECK); 1210 } // end JvmtiHideSingleStepping 1211 1212 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 1213 cp_cache_entry->set_method_handle(pool, info); 1214 } 1215 1216 // First time execution: Resolve symbols, create a permanent CallSite object. 1217 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { 1218 Thread* THREAD = thread; 1219 LastFrameAccessor last_frame(thread); 1220 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 1221 1222 // resolve method 1223 CallInfo info; 1224 constantPoolHandle pool(thread, last_frame.method()->constants()); 1225 int index = last_frame.get_index_u4(bytecode); 1226 { 1227 JvmtiHideSingleStepping jhss(thread); 1228 LinkResolver::resolve_invoke(info, Handle(), pool, 1229 index, bytecode, CHECK); 1230 } // end JvmtiHideSingleStepping 1231 1232 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 1233 cp_cache_entry->set_dynamic_call(pool, info); 1234 } 1235 1236 // This function is the interface to the assembly code. It returns the resolved 1237 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 1238 // This function will check for redefinition! 1239 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { 1240 switch (bytecode) { 1241 case Bytecodes::_getstatic: 1242 case Bytecodes::_putstatic: 1243 case Bytecodes::_getfield: 1244 case Bytecodes::_putfield: 1245 case Bytecodes::_withfield: 1246 resolve_get_put(thread, bytecode); 1247 break; 1248 case Bytecodes::_invokevirtual: 1249 case Bytecodes::_invokespecial: 1250 case Bytecodes::_invokestatic: 1251 case Bytecodes::_invokeinterface: 1252 resolve_invoke(thread, bytecode); 1253 break; 1254 case Bytecodes::_invokehandle: 1255 resolve_invokehandle(thread); 1256 break; 1257 case Bytecodes::_invokedynamic: 1258 resolve_invokedynamic(thread); 1259 break; 1260 default: 1261 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 1262 break; 1263 } 1264 } 1265 JRT_END 1266 1267 //------------------------------------------------------------------------------------------------------------------------ 1268 // Miscellaneous 1269 1270 1271 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { 1272 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); 1273 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 1274 if (branch_bcp != NULL && nm != NULL) { 1275 // This was a successful request for an OSR nmethod. Because 1276 // frequency_counter_overflow_inner ends with a safepoint check, 1277 // nm could have been unloaded so look it up again. It's unsafe 1278 // to examine nm directly since it might have been freed and used 1279 // for something else. 1280 LastFrameAccessor last_frame(thread); 1281 Method* method = last_frame.method(); 1282 int bci = method->bci_from(last_frame.bcp()); 1283 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 1284 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod(); 1285 if (nm != NULL && bs_nm != NULL) { 1286 // in case the transition passed a safepoint we need to barrier this again 1287 if (!bs_nm->nmethod_osr_entry_barrier(nm)) { 1288 nm = NULL; 1289 } 1290 } 1291 } 1292 if (nm != NULL && thread->is_interp_only_mode()) { 1293 // Normally we never get an nm if is_interp_only_mode() is true, because 1294 // policy()->event has a check for this and won't compile the method when 1295 // true. However, it's possible for is_interp_only_mode() to become true 1296 // during the compilation. We don't want to return the nm in that case 1297 // because we want to continue to execute interpreted. 1298 nm = NULL; 1299 } 1300 #ifndef PRODUCT 1301 if (TraceOnStackReplacement) { 1302 if (nm != NULL) { 1303 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 1304 nm->print(); 1305 } 1306 } 1307 #endif 1308 return nm; 1309 } 1310 1311 JRT_ENTRY(nmethod*, 1312 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) 1313 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 1314 // flag, in case this method triggers classloading which will call into Java. 1315 UnlockFlagSaver fs(thread); 1316 1317 LastFrameAccessor last_frame(thread); 1318 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1319 methodHandle method(thread, last_frame.method()); 1320 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 1321 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci; 1322 1323 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); 1324 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); 1325 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); 1326 1327 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod(); 1328 if (osr_nm != NULL && bs_nm != NULL) { 1329 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) { 1330 osr_nm = NULL; 1331 } 1332 } 1333 1334 if (osr_nm != NULL) { 1335 // We may need to do on-stack replacement which requires that no 1336 // monitors in the activation are biased because their 1337 // BasicObjectLocks will need to migrate during OSR. Force 1338 // unbiasing of all monitors in the activation now (even though 1339 // the OSR nmethod might be invalidated) because we don't have a 1340 // safepoint opportunity later once the migration begins. 1341 if (UseBiasedLocking) { 1342 ResourceMark rm; 1343 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); 1344 for( BasicObjectLock *kptr = last_frame.monitor_end(); 1345 kptr < last_frame.monitor_begin(); 1346 kptr = last_frame.next_monitor(kptr) ) { 1347 if( kptr->obj() != NULL ) { 1348 objects_to_revoke->append(Handle(THREAD, kptr->obj())); 1349 } 1350 } 1351 BiasedLocking::revoke(objects_to_revoke, thread); 1352 } 1353 } 1354 return osr_nm; 1355 JRT_END 1356 1357 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 1358 assert(ProfileInterpreter, "must be profiling interpreter"); 1359 int bci = method->bci_from(cur_bcp); 1360 MethodData* mdo = method->method_data(); 1361 if (mdo == NULL) return 0; 1362 return mdo->bci_to_di(bci); 1363 JRT_END 1364 1365 JRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) 1366 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 1367 // flag, in case this method triggers classloading which will call into Java. 1368 UnlockFlagSaver fs(thread); 1369 1370 assert(ProfileInterpreter, "must be profiling interpreter"); 1371 LastFrameAccessor last_frame(thread); 1372 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1373 methodHandle method(thread, last_frame.method()); 1374 Method::build_interpreter_method_data(method, THREAD); 1375 if (HAS_PENDING_EXCEPTION) { 1376 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1377 CLEAR_PENDING_EXCEPTION; 1378 // and fall through... 1379 } 1380 JRT_END 1381 1382 1383 #ifdef ASSERT 1384 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 1385 assert(ProfileInterpreter, "must be profiling interpreter"); 1386 1387 MethodData* mdo = method->method_data(); 1388 assert(mdo != NULL, "must not be null"); 1389 1390 int bci = method->bci_from(bcp); 1391 1392 address mdp2 = mdo->bci_to_dp(bci); 1393 if (mdp != mdp2) { 1394 ResourceMark rm; 1395 ResetNoHandleMark rnm; // In a LEAF entry. 1396 HandleMark hm; 1397 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 1398 int current_di = mdo->dp_to_di(mdp); 1399 int expected_di = mdo->dp_to_di(mdp2); 1400 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 1401 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 1402 int approx_bci = -1; 1403 if (current_di >= 0) { 1404 approx_bci = mdo->data_at(current_di)->bci(); 1405 } 1406 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1407 mdo->print_on(tty); 1408 method->print_codes(); 1409 } 1410 assert(mdp == mdp2, "wrong mdp"); 1411 JRT_END 1412 #endif // ASSERT 1413 1414 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) 1415 assert(ProfileInterpreter, "must be profiling interpreter"); 1416 ResourceMark rm(thread); 1417 HandleMark hm(thread); 1418 LastFrameAccessor last_frame(thread); 1419 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1420 MethodData* h_mdo = last_frame.method()->method_data(); 1421 1422 // Grab a lock to ensure atomic access to setting the return bci and 1423 // the displacement. This can block and GC, invalidating all naked oops. 1424 MutexLocker ml(RetData_lock); 1425 1426 // ProfileData is essentially a wrapper around a derived oop, so we 1427 // need to take the lock before making any ProfileData structures. 1428 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp())); 1429 guarantee(data != NULL, "profile data must be valid"); 1430 RetData* rdata = data->as_RetData(); 1431 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1432 last_frame.set_mdp(new_mdp); 1433 JRT_END 1434 1435 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) 1436 MethodCounters* mcs = Method::build_method_counters(m, thread); 1437 if (HAS_PENDING_EXCEPTION) { 1438 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); 1439 CLEAR_PENDING_EXCEPTION; 1440 } 1441 return mcs; 1442 JRT_END 1443 1444 1445 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) 1446 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1447 // stack traversal automatically takes care of preserving arguments for invoke, so 1448 // this is no longer needed. 1449 1450 // JRT_END does an implicit safepoint check, hence we are guaranteed to block 1451 // if this is called during a safepoint 1452 1453 if (JvmtiExport::should_post_single_step()) { 1454 // We are called during regular safepoints and when the VM is 1455 // single stepping. If any thread is marked for single stepping, 1456 // then we may have JVMTI work to do. 1457 LastFrameAccessor last_frame(thread); 1458 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp()); 1459 } 1460 JRT_END 1461 1462 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, 1463 ConstantPoolCacheEntry *cp_entry)) 1464 1465 // check the access_flags for the field in the klass 1466 1467 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1468 int index = cp_entry->field_index(); 1469 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1470 1471 bool is_static = (obj == NULL); 1472 bool is_flattened = cp_entry->is_flattened(); 1473 HandleMark hm(thread); 1474 1475 Handle h_obj; 1476 if (!is_static) { 1477 // non-static field accessors have an object, but we need a handle 1478 h_obj = Handle(thread, obj); 1479 } 1480 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass()); 1481 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static, is_flattened); 1482 LastFrameAccessor last_frame(thread); 1483 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid); 1484 JRT_END 1485 1486 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, 1487 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1488 1489 Klass* k = cp_entry->f1_as_klass(); 1490 1491 // check the access_flags for the field in the klass 1492 InstanceKlass* ik = InstanceKlass::cast(k); 1493 int index = cp_entry->field_index(); 1494 // bail out if field modifications are not watched 1495 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1496 1497 char sig_type = '\0'; 1498 1499 switch(cp_entry->flag_state()) { 1500 case btos: sig_type = JVM_SIGNATURE_BYTE; break; 1501 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break; 1502 case ctos: sig_type = JVM_SIGNATURE_CHAR; break; 1503 case stos: sig_type = JVM_SIGNATURE_SHORT; break; 1504 case itos: sig_type = JVM_SIGNATURE_INT; break; 1505 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break; 1506 case atos: sig_type = JVM_SIGNATURE_CLASS; break; 1507 case ltos: sig_type = JVM_SIGNATURE_LONG; break; 1508 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break; 1509 default: ShouldNotReachHere(); return; 1510 } 1511 1512 // Both Q-signatures and L-signatures are mapped to atos 1513 if (cp_entry->flag_state() == atos && ik->field_signature(index)->is_Q_signature()) { 1514 sig_type = JVM_SIGNATURE_VALUETYPE; 1515 } 1516 1517 bool is_static = (obj == NULL); 1518 bool is_flattened = cp_entry->is_flattened(); 1519 1520 HandleMark hm(thread); 1521 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static, is_flattened); 1522 jvalue fvalue; 1523 #ifdef _LP64 1524 fvalue = *value; 1525 #else 1526 // Long/double values are stored unaligned and also noncontiguously with 1527 // tagged stacks. We can't just do a simple assignment even in the non- 1528 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1529 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1530 // We assume that the two halves of longs/doubles are stored in interpreter 1531 // stack slots in platform-endian order. 1532 jlong_accessor u; 1533 jint* newval = (jint*)value; 1534 u.words[0] = newval[0]; 1535 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1536 fvalue.j = u.long_value; 1537 #endif // _LP64 1538 1539 Handle h_obj; 1540 if (!is_static) { 1541 // non-static field accessors have an object, but we need a handle 1542 h_obj = Handle(thread, obj); 1543 } 1544 1545 LastFrameAccessor last_frame(thread); 1546 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj, 1547 fid, sig_type, &fvalue); 1548 JRT_END 1549 1550 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) 1551 LastFrameAccessor last_frame(thread); 1552 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame()); 1553 JRT_END 1554 1555 1556 JRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) 1557 LastFrameAccessor last_frame(thread); 1558 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame()); 1559 JRT_END 1560 1561 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1562 { 1563 return (Interpreter::contains(pc) ? 1 : 0); 1564 } 1565 JRT_END 1566 1567 1568 // Implementation of SignatureHandlerLibrary 1569 1570 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1571 // Dummy definition (else normalization method is defined in CPU 1572 // dependant code) 1573 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1574 return fingerprint; 1575 } 1576 #endif 1577 1578 address SignatureHandlerLibrary::set_handler_blob() { 1579 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1580 if (handler_blob == NULL) { 1581 return NULL; 1582 } 1583 address handler = handler_blob->code_begin(); 1584 _handler_blob = handler_blob; 1585 _handler = handler; 1586 return handler; 1587 } 1588 1589 void SignatureHandlerLibrary::initialize() { 1590 if (_fingerprints != NULL) { 1591 return; 1592 } 1593 if (set_handler_blob() == NULL) { 1594 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1595 } 1596 1597 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1598 SignatureHandlerLibrary::buffer_size); 1599 _buffer = bb->code_begin(); 1600 1601 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); 1602 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); 1603 } 1604 1605 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1606 address handler = _handler; 1607 int insts_size = buffer->pure_insts_size(); 1608 if (handler + insts_size > _handler_blob->code_end()) { 1609 // get a new handler blob 1610 handler = set_handler_blob(); 1611 } 1612 if (handler != NULL) { 1613 memcpy(handler, buffer->insts_begin(), insts_size); 1614 pd_set_handler(handler); 1615 ICache::invalidate_range(handler, insts_size); 1616 _handler = handler + insts_size; 1617 } 1618 return handler; 1619 } 1620 1621 void SignatureHandlerLibrary::add(const methodHandle& method) { 1622 if (method->signature_handler() == NULL) { 1623 // use slow signature handler if we can't do better 1624 int handler_index = -1; 1625 // check if we can use customized (fast) signature handler 1626 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { 1627 // use customized signature handler 1628 MutexLocker mu(SignatureHandlerLibrary_lock); 1629 // make sure data structure is initialized 1630 initialize(); 1631 // lookup method signature's fingerprint 1632 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1633 // allow CPU dependant code to optimize the fingerprints for the fast handler 1634 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1635 handler_index = _fingerprints->find(fingerprint); 1636 // create handler if necessary 1637 if (handler_index < 0) { 1638 ResourceMark rm; 1639 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer; 1640 CodeBuffer buffer((address)(_buffer + align_offset), 1641 SignatureHandlerLibrary::buffer_size - align_offset); 1642 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1643 // copy into code heap 1644 address handler = set_handler(&buffer); 1645 if (handler == NULL) { 1646 // use slow signature handler (without memorizing it in the fingerprints) 1647 } else { 1648 // debugging suppport 1649 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1650 ttyLocker ttyl; 1651 tty->cr(); 1652 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1653 _handlers->length(), 1654 (method->is_static() ? "static" : "receiver"), 1655 method->name_and_sig_as_C_string(), 1656 fingerprint, 1657 buffer.insts_size()); 1658 if (buffer.insts_size() > 0) { 1659 Disassembler::decode(handler, handler + buffer.insts_size()); 1660 } 1661 #ifndef PRODUCT 1662 address rh_begin = Interpreter::result_handler(method()->result_type()); 1663 if (CodeCache::contains(rh_begin)) { 1664 // else it might be special platform dependent values 1665 tty->print_cr(" --- associated result handler ---"); 1666 address rh_end = rh_begin; 1667 while (*(int*)rh_end != 0) { 1668 rh_end += sizeof(int); 1669 } 1670 Disassembler::decode(rh_begin, rh_end); 1671 } else { 1672 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1673 } 1674 #endif 1675 } 1676 // add handler to library 1677 _fingerprints->append(fingerprint); 1678 _handlers->append(handler); 1679 // set handler index 1680 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1681 handler_index = _fingerprints->length() - 1; 1682 } 1683 } 1684 // Set handler under SignatureHandlerLibrary_lock 1685 if (handler_index < 0) { 1686 // use generic signature handler 1687 method->set_signature_handler(Interpreter::slow_signature_handler()); 1688 } else { 1689 // set handler 1690 method->set_signature_handler(_handlers->at(handler_index)); 1691 } 1692 } else { 1693 DEBUG_ONLY(Thread::current()->check_possible_safepoint()); 1694 // use generic signature handler 1695 method->set_signature_handler(Interpreter::slow_signature_handler()); 1696 } 1697 } 1698 #ifdef ASSERT 1699 int handler_index = -1; 1700 int fingerprint_index = -2; 1701 { 1702 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1703 // in any way if accessed from multiple threads. To avoid races with another 1704 // thread which may change the arrays in the above, mutex protected block, we 1705 // have to protect this read access here with the same mutex as well! 1706 MutexLocker mu(SignatureHandlerLibrary_lock); 1707 if (_handlers != NULL) { 1708 handler_index = _handlers->find(method->signature_handler()); 1709 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1710 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1711 fingerprint_index = _fingerprints->find(fingerprint); 1712 } 1713 } 1714 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1715 handler_index == fingerprint_index, "sanity check"); 1716 #endif // ASSERT 1717 } 1718 1719 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1720 int handler_index = -1; 1721 // use customized signature handler 1722 MutexLocker mu(SignatureHandlerLibrary_lock); 1723 // make sure data structure is initialized 1724 initialize(); 1725 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1726 handler_index = _fingerprints->find(fingerprint); 1727 // create handler if necessary 1728 if (handler_index < 0) { 1729 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1730 tty->cr(); 1731 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1732 _handlers->length(), 1733 p2i(handler), 1734 fingerprint); 1735 } 1736 _fingerprints->append(fingerprint); 1737 _handlers->append(handler); 1738 } else { 1739 if (PrintSignatureHandlers) { 1740 tty->cr(); 1741 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1742 _handlers->length(), 1743 fingerprint, 1744 p2i(_handlers->at(handler_index)), 1745 p2i(handler)); 1746 } 1747 } 1748 } 1749 1750 1751 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1752 address SignatureHandlerLibrary::_handler = NULL; 1753 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1754 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1755 address SignatureHandlerLibrary::_buffer = NULL; 1756 1757 1758 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) 1759 methodHandle m(thread, method); 1760 assert(m->is_native(), "sanity check"); 1761 // lookup native function entry point if it doesn't exist 1762 bool in_base_library; 1763 if (!m->has_native_function()) { 1764 NativeLookup::lookup(m, in_base_library, CHECK); 1765 } 1766 // make sure signature handler is installed 1767 SignatureHandlerLibrary::add(m); 1768 // The interpreter entry point checks the signature handler first, 1769 // before trying to fetch the native entry point and klass mirror. 1770 // We must set the signature handler last, so that multiple processors 1771 // preparing the same method will be sure to see non-null entry & mirror. 1772 JRT_END 1773 1774 #if defined(IA32) || defined(AMD64) || defined(ARM) 1775 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) 1776 if (src_address == dest_address) { 1777 return; 1778 } 1779 ResetNoHandleMark rnm; // In a LEAF entry. 1780 HandleMark hm; 1781 ResourceMark rm; 1782 LastFrameAccessor last_frame(thread); 1783 assert(last_frame.is_interpreted_frame(), ""); 1784 jint bci = last_frame.bci(); 1785 methodHandle mh(thread, last_frame.method()); 1786 Bytecode_invoke invoke(mh, bci); 1787 ArgumentSizeComputer asc(invoke.signature()); 1788 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1789 Copy::conjoint_jbytes(src_address, dest_address, 1790 size_of_arguments * Interpreter::stackElementSize); 1791 JRT_END 1792 #endif 1793 1794 #if INCLUDE_JVMTI 1795 // This is a support of the JVMTI PopFrame interface. 1796 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1797 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1798 // The member_name argument is a saved reference (in local#0) to the member_name. 1799 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1800 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1801 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, 1802 Method* method, address bcp)) 1803 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1804 if (code != Bytecodes::_invokestatic) { 1805 return; 1806 } 1807 ConstantPool* cpool = method->constants(); 1808 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1809 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1810 Symbol* mname = cpool->name_ref_at(cp_index); 1811 1812 if (MethodHandles::has_member_arg(cname, mname)) { 1813 oop member_name_oop = (oop) member_name; 1814 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1815 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1816 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1817 } 1818 thread->set_vm_result(member_name_oop); 1819 } else { 1820 thread->set_vm_result(NULL); 1821 } 1822 JRT_END 1823 #endif // INCLUDE_JVMTI 1824 1825 #ifndef PRODUCT 1826 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to 1827 // call this, which changes rsp and makes the interpreter's expression stack not walkable. 1828 // The generated code still uses call_VM because that will set up the frame pointer for 1829 // bcp and method. 1830 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) 1831 LastFrameAccessor last_frame(thread); 1832 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame"); 1833 methodHandle mh(thread, last_frame.method()); 1834 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2); 1835 return preserve_this_value; 1836 JRT_END 1837 #endif // !PRODUCT