1 /* 2 * Copyright (c) 1997, 2021, 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 "jvm_io.h" 27 #include "classfile/javaClasses.inline.hpp" 28 #include "classfile/symbolTable.hpp" 29 #include "classfile/systemDictionary.hpp" 30 #include "classfile/vmClasses.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "code/codeCache.hpp" 33 #include "compiler/compilationPolicy.hpp" 34 #include "compiler/compileBroker.hpp" 35 #include "compiler/disassembler.hpp" 36 #include "gc/shared/barrierSetNMethod.hpp" 37 #include "gc/shared/collectedHeap.hpp" 38 #include "interpreter/interpreter.hpp" 39 #include "interpreter/interpreterRuntime.hpp" 40 #include "interpreter/linkResolver.hpp" 41 #include "interpreter/templateTable.hpp" 42 #include "logging/log.hpp" 43 #include "memory/oopFactory.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "memory/universe.hpp" 46 #include "oops/constantPool.hpp" 47 #include "oops/cpCache.inline.hpp" 48 #include "oops/flatArrayKlass.hpp" 49 #include "oops/flatArrayOop.inline.hpp" 50 #include "oops/inlineKlass.inline.hpp" 51 #include "oops/instanceKlass.inline.hpp" 52 #include "oops/klass.inline.hpp" 53 #include "oops/methodData.hpp" 54 #include "oops/objArrayKlass.hpp" 55 #include "oops/objArrayOop.inline.hpp" 56 #include "oops/oop.inline.hpp" 57 #include "oops/symbol.hpp" 58 #include "prims/jvmtiExport.hpp" 59 #include "prims/methodHandles.hpp" 60 #include "prims/nativeLookup.hpp" 61 #include "runtime/atomic.hpp" 62 #include "runtime/deoptimization.hpp" 63 #include "runtime/fieldDescriptor.inline.hpp" 64 #include "runtime/frame.inline.hpp" 65 #include "runtime/handles.inline.hpp" 66 #include "runtime/icache.hpp" 67 #include "runtime/interfaceSupport.inline.hpp" 68 #include "runtime/java.hpp" 69 #include "runtime/javaCalls.hpp" 70 #include "runtime/jfieldIDWorkaround.hpp" 71 #include "runtime/osThread.hpp" 72 #include "runtime/sharedRuntime.hpp" 73 #include "runtime/stackWatermarkSet.hpp" 74 #include "runtime/stubRoutines.hpp" 75 #include "runtime/synchronizer.hpp" 76 #include "runtime/threadCritical.hpp" 77 #include "utilities/align.hpp" 78 #include "utilities/copy.hpp" 79 #include "utilities/events.hpp" 80 #include "utilities/globalDefinitions.hpp" 81 #ifdef COMPILER2 82 #include "opto/runtime.hpp" 83 #endif 84 85 // Helper class to access current interpreter state 86 class LastFrameAccessor : public StackObj { 87 frame _last_frame; 88 public: 89 LastFrameAccessor(JavaThread* current) { 90 assert(current == Thread::current(), "sanity"); 91 _last_frame = current->last_frame(); 92 } 93 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); } 94 Method* method() const { return _last_frame.interpreter_frame_method(); } 95 address bcp() const { return _last_frame.interpreter_frame_bcp(); } 96 int bci() const { return _last_frame.interpreter_frame_bci(); } 97 address mdp() const { return _last_frame.interpreter_frame_mdp(); } 98 99 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); } 100 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); } 101 102 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272) 103 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); } 104 105 Bytecode bytecode() const { return Bytecode(method(), bcp()); } 106 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); } 107 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); } 108 int get_index_u2_cpcache(Bytecodes::Code bc) const 109 { return bytecode().get_index_u2_cpcache(bc); } 110 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); } 111 int number_of_dimensions() const { return bcp()[3]; } 112 ConstantPoolCacheEntry* cache_entry_at(int i) const 113 { return method()->constants()->cache()->entry_at(i); } 114 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); } 115 116 oop callee_receiver(Symbol* signature) { 117 return _last_frame.interpreter_callee_receiver(signature); 118 } 119 BasicObjectLock* monitor_begin() const { 120 return _last_frame.interpreter_frame_monitor_begin(); 121 } 122 BasicObjectLock* monitor_end() const { 123 return _last_frame.interpreter_frame_monitor_end(); 124 } 125 BasicObjectLock* next_monitor(BasicObjectLock* current) const { 126 return _last_frame.next_monitor_in_interpreter_frame(current); 127 } 128 129 frame& get_frame() { return _last_frame; } 130 }; 131 132 //------------------------------------------------------------------------------------------------------------------------ 133 // State accessors 134 135 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) { 136 LastFrameAccessor last_frame(current); 137 last_frame.set_bcp(bcp); 138 if (ProfileInterpreter) { 139 // ProfileTraps uses MDOs independently of ProfileInterpreter. 140 // That is why we must check both ProfileInterpreter and mdo != NULL. 141 MethodData* mdo = last_frame.method()->method_data(); 142 if (mdo != NULL) { 143 NEEDS_CLEANUP; 144 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci())); 145 } 146 } 147 } 148 149 //------------------------------------------------------------------------------------------------------------------------ 150 // Constants 151 152 153 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide)) 154 // access constant pool 155 LastFrameAccessor last_frame(current); 156 ConstantPool* pool = last_frame.method()->constants(); 157 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc); 158 constantTag tag = pool->tag_at(index); 159 160 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); 161 Klass* klass = pool->klass_at(index, CHECK); 162 oop java_class = tag.is_Qdescriptor_klass() 163 ? InlineKlass::cast(klass)->val_mirror() 164 : klass->java_mirror(); 165 current->set_vm_result(java_class); 166 JRT_END 167 168 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) { 169 assert(bytecode == Bytecodes::_ldc || 170 bytecode == Bytecodes::_ldc_w || 171 bytecode == Bytecodes::_ldc2_w || 172 bytecode == Bytecodes::_fast_aldc || 173 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); 174 ResourceMark rm(current); 175 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc || 176 bytecode == Bytecodes::_fast_aldc_w); 177 LastFrameAccessor last_frame(current); 178 methodHandle m (current, last_frame.method()); 179 Bytecode_loadconstant ldc(m, last_frame.bci()); 180 181 // Double-check the size. (Condy can have any type.) 182 BasicType type = ldc.result_type(); 183 switch (type2size[type]) { 184 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break; 185 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break; 186 default: ShouldNotReachHere(); 187 } 188 189 // Resolve the constant. This does not do unboxing. 190 // But it does replace Universe::the_null_sentinel by null. 191 oop result = ldc.resolve_constant(CHECK); 192 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc"); 193 194 #ifdef ASSERT 195 { 196 // The bytecode wrappers aren't GC-safe so construct a new one 197 Bytecode_loadconstant ldc2(m, last_frame.bci()); 198 int rindex = ldc2.cache_index(); 199 if (rindex < 0) 200 rindex = m->constants()->cp_to_object_index(ldc2.pool_index()); 201 if (rindex >= 0) { 202 oop coop = m->constants()->resolved_references()->obj_at(rindex); 203 oop roop = (result == NULL ? Universe::the_null_sentinel() : result); 204 assert(roop == coop, "expected result for assembly code"); 205 } 206 } 207 #endif 208 current->set_vm_result(result); 209 if (!is_fast_aldc) { 210 // Tell the interpreter how to unbox the primitive. 211 guarantee(java_lang_boxing_object::is_instance(result, type), ""); 212 int offset = java_lang_boxing_object::value_offset(type); 213 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift) 214 | (offset & ConstantPoolCacheEntry::field_index_mask)); 215 current->set_vm_result_2((Metadata*)flags); 216 } 217 } 218 JRT_END 219 220 221 //------------------------------------------------------------------------------------------------------------------------ 222 // Allocation 223 224 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index)) 225 Klass* k = pool->klass_at(index, CHECK); 226 InstanceKlass* klass = InstanceKlass::cast(k); 227 228 if (klass->is_inline_klass()) { 229 THROW(vmSymbols::java_lang_InstantiationError()); 230 } 231 232 // Make sure we are not instantiating an abstract klass 233 klass->check_valid_for_instantiation(true, CHECK); 234 235 // Make sure klass is initialized 236 klass->initialize(CHECK); 237 238 // At this point the class may not be fully initialized 239 // because of recursive initialization. If it is fully 240 // initialized & has_finalized is not set, we rewrite 241 // it into its fast version (Note: no locking is needed 242 // here since this is an atomic byte write and can be 243 // done more than once). 244 // 245 // Note: In case of classes with has_finalized we don't 246 // rewrite since that saves us an extra check in 247 // the fast version which then would call the 248 // slow version anyway (and do a call back into 249 // Java). 250 // If we have a breakpoint, then we don't rewrite 251 // because the _breakpoint bytecode would be lost. 252 oop obj = klass->allocate_instance(CHECK); 253 current->set_vm_result(obj); 254 JRT_END 255 256 JRT_ENTRY(void, InterpreterRuntime::aconst_init(JavaThread* current, ConstantPool* pool, int index)) 257 // Getting the InlineKlass 258 Klass* k = pool->klass_at(index, CHECK); 259 if (!k->is_inline_klass()) { 260 // inconsistency with 'new' which throws an InstantiationError 261 // in the future, aconst_init will just return null instead of throwing an exception 262 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 263 } 264 assert(k->is_inline_klass(), "aconst_init argument must be the inline type class"); 265 InlineKlass* vklass = InlineKlass::cast(k); 266 267 vklass->initialize(CHECK); 268 oop res = vklass->default_value(); 269 current->set_vm_result(res); 270 JRT_END 271 272 JRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* current, ConstantPoolCacheEntry* cpe, uintptr_t ptr)) 273 oop obj = NULL; 274 int recv_offset = type2size[as_BasicType(cpe->flag_state())]; 275 assert(frame::interpreter_frame_expression_stack_direction() == -1, "currently is -1 on all platforms"); 276 int ret_adj = (recv_offset + type2size[T_OBJECT] )* AbstractInterpreter::stackElementSize; 277 int offset = cpe->f2_as_offset(); 278 obj = (oopDesc*)(((uintptr_t*)ptr)[recv_offset * Interpreter::stackElementWords]); 279 if (obj == NULL) { 280 THROW_(vmSymbols::java_lang_NullPointerException(), ret_adj); 281 } 282 assert(oopDesc::is_oop(obj), "Verifying receiver"); 283 assert(obj->klass()->is_inline_klass(), "Must have been checked during resolution"); 284 instanceHandle old_value_h(THREAD, (instanceOop)obj); 285 oop ref = NULL; 286 if (cpe->flag_state() == atos) { 287 ref = *(oopDesc**)ptr; 288 } 289 Handle ref_h(THREAD, ref); 290 InlineKlass* ik = InlineKlass::cast(old_value_h()->klass()); 291 // Ensure that the class is initialized or being initialized 292 // If the class is in error state, the creation of a new value should not be allowed 293 ik->initialize(CHECK_(ret_adj)); 294 295 bool can_skip = false; 296 switch(cpe->flag_state()) { 297 case ztos: 298 if (old_value_h()->bool_field(offset) == (jboolean)(*(jint*)ptr)) can_skip = true; 299 break; 300 case btos: 301 if (old_value_h()->byte_field(offset) == (jbyte)(*(jint*)ptr)) can_skip = true; 302 break; 303 case ctos: 304 if (old_value_h()->char_field(offset) == (jchar)(*(jint*)ptr)) can_skip = true; 305 break; 306 case stos: 307 if (old_value_h()->short_field(offset) == (jshort)(*(jint*)ptr)) can_skip = true; 308 break; 309 case itos: 310 if (old_value_h()->int_field(offset) == *(jint*)ptr) can_skip = true; 311 break; 312 case ltos: 313 if (old_value_h()->long_field(offset) == *(jlong*)ptr) can_skip = true; 314 break; 315 case ftos: 316 if (memcmp(old_value_h()->field_addr<jfloat>(offset), (jfloat*)ptr, sizeof(jfloat)) == 0) can_skip = true; 317 break; 318 case dtos: 319 if (memcmp(old_value_h()->field_addr<jdouble>(offset), (jdouble*)ptr, sizeof(jdouble)) == 0) can_skip = true; 320 break; 321 case atos: 322 if (!cpe->is_inlined() && old_value_h()->obj_field(offset) == ref_h()) can_skip = true; 323 break; 324 default: 325 break; 326 } 327 if (can_skip) { 328 current->set_vm_result(old_value_h()); 329 return ret_adj; 330 } 331 332 instanceOop new_value = ik->allocate_instance_buffer(CHECK_(ret_adj)); 333 Handle new_value_h = Handle(THREAD, new_value); 334 ik->inline_copy_oop_to_new_oop(old_value_h(), new_value_h()); 335 switch(cpe->flag_state()) { 336 case ztos: 337 new_value_h()->bool_field_put(offset, (jboolean)(*(jint*)ptr)); 338 break; 339 case btos: 340 new_value_h()->byte_field_put(offset, (jbyte)(*(jint*)ptr)); 341 break; 342 case ctos: 343 new_value_h()->char_field_put(offset, (jchar)(*(jint*)ptr)); 344 break; 345 case stos: 346 new_value_h()->short_field_put(offset, (jshort)(*(jint*)ptr)); 347 break; 348 case itos: 349 new_value_h()->int_field_put(offset, (*(jint*)ptr)); 350 break; 351 case ltos: 352 new_value_h()->long_field_put(offset, *(jlong*)ptr); 353 break; 354 case ftos: 355 new_value_h()->float_field_put(offset, *(jfloat*)ptr); 356 break; 357 case dtos: 358 new_value_h()->double_field_put(offset, *(jdouble*)ptr); 359 break; 360 case atos: 361 { 362 if (cpe->is_null_free_inline_type()) { 363 if (!cpe->is_inlined()) { 364 if (ref_h() == NULL) { 365 THROW_(vmSymbols::java_lang_NullPointerException(), ret_adj); 366 } 367 new_value_h()->obj_field_put(offset, ref_h()); 368 } else { 369 int field_index = cpe->field_index(); 370 InlineKlass* field_ik = InlineKlass::cast(ik->get_inline_type_field_klass(field_index)); 371 field_ik->write_inlined_field(new_value_h(), offset, ref_h(), CHECK_(ret_adj)); 372 } 373 } else { 374 new_value_h()->obj_field_put(offset, ref_h()); 375 } 376 } 377 break; 378 default: 379 ShouldNotReachHere(); 380 } 381 current->set_vm_result(new_value_h()); 382 return ret_adj; 383 JRT_END 384 385 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_inline_type_field(JavaThread* current, oopDesc* mirror, int index)) 386 // The interpreter tries to access an inline static field that has not been initialized. 387 // This situation can happen in different scenarios: 388 // 1 - if the load or initialization of the field failed during step 8 of 389 // the initialization of the holder of the field, in this case the access to the field 390 // must fail 391 // 2 - it can also happen when the initialization of the holder class triggered the initialization of 392 // another class which accesses this field in its static initializer, in this case the 393 // access must succeed to allow circularity 394 // The code below tries to load and initialize the field's class again before returning the default value. 395 // If the field was not initialized because of an error, an exception should be thrown. 396 // If the class is being initialized, the default value is returned. 397 instanceHandle mirror_h(THREAD, (instanceOop)mirror); 398 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 399 assert(klass->field_signature(index)->is_Q_signature(), "Sanity check"); 400 if (klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD)) { 401 int offset = klass->field_offset(index); 402 Klass* field_k = klass->get_inline_type_field_klass_or_null(index); 403 if (field_k == NULL) { 404 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD), 405 Handle(THREAD, klass->class_loader()), 406 Handle(THREAD, klass->protection_domain()), 407 true, CHECK); 408 assert(field_k != NULL, "Should have been loaded or an exception thrown above"); 409 klass->set_inline_type_field_klass(index, field_k); 410 } 411 field_k->initialize(CHECK); 412 oop defaultvalue = InlineKlass::cast(field_k)->default_value(); 413 // It is safe to initialize the static field because 1) the current thread is the initializing thread 414 // and is the only one that can access it, and 2) the field is actually not initialized (i.e. null) 415 // otherwise the JVM should not be executing this code. 416 mirror_h()->obj_field_put(offset, defaultvalue); 417 current->set_vm_result(defaultvalue); 418 } else { 419 assert(klass->is_in_error_state(), "If not initializing, initialization must have failed to get there"); 420 ResourceMark rm(THREAD); 421 const char* desc = "Could not initialize class "; 422 const char* className = klass->external_name(); 423 size_t msglen = strlen(desc) + strlen(className) + 1; 424 char* message = NEW_RESOURCE_ARRAY(char, msglen); 425 if (NULL == message) { 426 // Out of memory: can't create detailed error message 427 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); 428 } else { 429 jio_snprintf(message, msglen, "%s%s", desc, className); 430 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); 431 } 432 } 433 JRT_END 434 435 JRT_ENTRY(void, InterpreterRuntime::read_inlined_field(JavaThread* current, oopDesc* obj, int index, Klass* field_holder)) 436 Handle obj_h(THREAD, obj); 437 438 assert(oopDesc::is_oop(obj), "Sanity check"); 439 440 assert(field_holder->is_instance_klass(), "Sanity check"); 441 InstanceKlass* klass = InstanceKlass::cast(field_holder); 442 443 assert(klass->field_is_inlined(index), "Sanity check"); 444 445 InlineKlass* field_vklass = InlineKlass::cast(klass->get_inline_type_field_klass(index)); 446 447 oop res = field_vklass->read_inlined_field(obj_h(), klass->field_offset(index), CHECK); 448 current->set_vm_result(res); 449 JRT_END 450 451 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size)) 452 oop obj = oopFactory::new_typeArray(type, size, CHECK); 453 current->set_vm_result(obj); 454 JRT_END 455 456 457 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size)) 458 Klass* klass = pool->klass_at(index, CHECK); 459 bool is_qtype_desc = pool->tag_at(index).is_Qdescriptor_klass(); 460 arrayOop obj; 461 if ((!klass->is_array_klass()) && is_qtype_desc) { // Logically creates elements, ensure klass init 462 klass->initialize(CHECK); 463 obj = oopFactory::new_valueArray(klass, size, CHECK); 464 } else { 465 obj = oopFactory::new_objArray(klass, size, CHECK); 466 } 467 current->set_vm_result(obj); 468 JRT_END 469 470 JRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* current, arrayOopDesc* array, int index)) 471 flatArrayHandle vah(current, (flatArrayOop)array); 472 oop value_holder = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK); 473 current->set_vm_result(value_holder); 474 JRT_END 475 476 JRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* current, void* val, arrayOopDesc* array, int index)) 477 assert(val != NULL, "can't store null into flat array"); 478 ((flatArrayOop)array)->value_copy_to_index(cast_to_oop(val), index); 479 JRT_END 480 481 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address)) 482 // We may want to pass in more arguments - could make this slightly faster 483 LastFrameAccessor last_frame(current); 484 ConstantPool* constants = last_frame.method()->constants(); 485 int i = last_frame.get_index_u2(Bytecodes::_multianewarray); 486 Klass* klass = constants->klass_at(i, CHECK); 487 bool is_qtype = klass->name()->is_Q_array_signature(); 488 int nof_dims = last_frame.number_of_dimensions(); 489 assert(klass->is_klass(), "not a class"); 490 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); 491 492 if (is_qtype) { // Logically creates elements, ensure klass init 493 klass->initialize(CHECK); 494 } 495 496 // We must create an array of jints to pass to multi_allocate. 497 ResourceMark rm(current); 498 const int small_dims = 10; 499 jint dim_array[small_dims]; 500 jint *dims = &dim_array[0]; 501 if (nof_dims > small_dims) { 502 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); 503 } 504 for (int index = 0; index < nof_dims; index++) { 505 // offset from first_size_address is addressed as local[index] 506 int n = Interpreter::local_offset_in_bytes(index)/jintSize; 507 dims[index] = first_size_address[n]; 508 } 509 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); 510 current->set_vm_result(obj); 511 JRT_END 512 513 514 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj)) 515 assert(oopDesc::is_oop(obj), "must be a valid oop"); 516 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); 517 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); 518 JRT_END 519 520 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj)) 521 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops"); 522 523 Handle ha(THREAD, aobj); 524 Handle hb(THREAD, bobj); 525 JavaValue result(T_BOOLEAN); 526 JavaCallArguments args; 527 args.push_oop(ha); 528 args.push_oop(hb); 529 methodHandle method(current, Universe::is_substitutable_method()); 530 JavaCalls::call(&result, method, &args, THREAD); 531 if (HAS_PENDING_EXCEPTION) { 532 // Something really bad happened because isSubstitutable() should not throw exceptions 533 // If it is an error, just let it propagate 534 // If it is an exception, wrap it into an InternalError 535 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) { 536 Handle e(THREAD, PENDING_EXCEPTION); 537 CLEAR_PENDING_EXCEPTION; 538 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false); 539 } 540 } 541 return result.get_jboolean(); 542 JRT_END 543 544 // Quicken instance-of and check-cast bytecodes 545 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current)) 546 // Force resolving; quicken the bytecode 547 LastFrameAccessor last_frame(current); 548 int which = last_frame.get_index_u2(Bytecodes::_checkcast); 549 ConstantPool* cpool = last_frame.method()->constants(); 550 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded 551 // program we might have seen an unquick'd bytecode in the interpreter but have another 552 // thread quicken the bytecode before we get here. 553 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); 554 Klass* klass = cpool->klass_at(which, CHECK); 555 current->set_vm_result_2(klass); 556 JRT_END 557 558 559 //------------------------------------------------------------------------------------------------------------------------ 560 // Exceptions 561 562 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason, 563 const methodHandle& trap_method, int trap_bci) { 564 if (trap_method.not_null()) { 565 MethodData* trap_mdo = trap_method->method_data(); 566 if (trap_mdo == NULL) { 567 ExceptionMark em(current); 568 JavaThread* THREAD = current; // For exception macros. 569 Method::build_interpreter_method_data(trap_method, THREAD); 570 if (HAS_PENDING_EXCEPTION) { 571 // Only metaspace OOM is expected. No Java code executed. 572 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())), 573 "we expect only an OOM error here"); 574 CLEAR_PENDING_EXCEPTION; 575 } 576 trap_mdo = trap_method->method_data(); 577 // and fall through... 578 } 579 if (trap_mdo != NULL) { 580 // Update per-method count of trap events. The interpreter 581 // is updating the MDO to simulate the effect of compiler traps. 582 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); 583 } 584 } 585 } 586 587 // Assume the compiler is (or will be) interested in this event. 588 // If necessary, create an MDO to hold the information, and record it. 589 void InterpreterRuntime::note_trap(JavaThread* current, int reason) { 590 assert(ProfileTraps, "call me only if profiling"); 591 LastFrameAccessor last_frame(current); 592 methodHandle trap_method(current, last_frame.method()); 593 int trap_bci = trap_method->bci_from(last_frame.bcp()); 594 note_trap_inner(current, reason, trap_method, trap_bci); 595 } 596 597 static Handle get_preinitialized_exception(Klass* k, TRAPS) { 598 // get klass 599 InstanceKlass* klass = InstanceKlass::cast(k); 600 assert(klass->is_initialized(), 601 "this klass should have been initialized during VM initialization"); 602 // create instance - do not call constructor since we may have no 603 // (java) stack space left (should assert constructor is empty) 604 Handle exception; 605 oop exception_oop = klass->allocate_instance(CHECK_(exception)); 606 exception = Handle(THREAD, exception_oop); 607 if (StackTraceInThrowable) { 608 java_lang_Throwable::fill_in_stack_trace(exception); 609 } 610 return exception; 611 } 612 613 // Special handling for stack overflow: since we don't have any (java) stack 614 // space left we use the pre-allocated & pre-initialized StackOverflowError 615 // klass to create an stack overflow error instance. We do not call its 616 // constructor for the same reason (it is empty, anyway). 617 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current)) 618 Handle exception = get_preinitialized_exception( 619 vmClasses::StackOverflowError_klass(), 620 CHECK); 621 // Increment counter for hs_err file reporting 622 Atomic::inc(&Exceptions::_stack_overflow_errors); 623 THROW_HANDLE(exception); 624 JRT_END 625 626 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current)) 627 Handle exception = get_preinitialized_exception( 628 vmClasses::StackOverflowError_klass(), 629 CHECK); 630 java_lang_Throwable::set_message(exception(), 631 Universe::delayed_stack_overflow_error_message()); 632 // Increment counter for hs_err file reporting 633 Atomic::inc(&Exceptions::_stack_overflow_errors); 634 THROW_HANDLE(exception); 635 JRT_END 636 637 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message)) 638 // lookup exception klass 639 TempNewSymbol s = SymbolTable::new_symbol(name); 640 if (ProfileTraps) { 641 if (s == vmSymbols::java_lang_ArithmeticException()) { 642 note_trap(current, Deoptimization::Reason_div0_check); 643 } else if (s == vmSymbols::java_lang_NullPointerException()) { 644 note_trap(current, Deoptimization::Reason_null_check); 645 } 646 } 647 // create exception 648 Handle exception = Exceptions::new_exception(current, s, message); 649 current->set_vm_result(exception()); 650 JRT_END 651 652 653 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj)) 654 // Produce the error message first because note_trap can safepoint 655 ResourceMark rm(current); 656 const char* klass_name = obj->klass()->external_name(); 657 // lookup exception klass 658 TempNewSymbol s = SymbolTable::new_symbol(name); 659 if (ProfileTraps) { 660 if (s == vmSymbols::java_lang_ArrayStoreException()) { 661 note_trap(current, Deoptimization::Reason_array_check); 662 } else { 663 note_trap(current, Deoptimization::Reason_class_check); 664 } 665 } 666 // create exception, with klass name as detail message 667 Handle exception = Exceptions::new_exception(current, s, klass_name); 668 current->set_vm_result(exception()); 669 JRT_END 670 671 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index)) 672 // Produce the error message first because note_trap can safepoint 673 ResourceMark rm(current); 674 stringStream ss; 675 ss.print("Index %d out of bounds for length %d", index, a->length()); 676 677 if (ProfileTraps) { 678 note_trap(current, Deoptimization::Reason_range_check); 679 } 680 681 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 682 JRT_END 683 684 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( 685 JavaThread* current, oopDesc* obj)) 686 687 // Produce the error message first because note_trap can safepoint 688 ResourceMark rm(current); 689 char* message = SharedRuntime::generate_class_cast_message( 690 current, obj->klass()); 691 692 if (ProfileTraps) { 693 note_trap(current, Deoptimization::Reason_class_check); 694 } 695 696 // create exception 697 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); 698 JRT_END 699 700 // exception_handler_for_exception(...) returns the continuation address, 701 // the exception oop (via TLS) and sets the bci/bcp for the continuation. 702 // The exception oop is returned to make sure it is preserved over GC (it 703 // is only on the stack if the exception was thrown explicitly via athrow). 704 // During this operation, the expression stack contains the values for the 705 // bci where the exception happened. If the exception was propagated back 706 // from a call, the expression stack contains the values for the bci at the 707 // invoke w/o arguments (i.e., as if one were inside the call). 708 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception)) 709 // We get here after we have unwound from a callee throwing an exception 710 // into the interpreter. Any deferred stack processing is notified of 711 // the event via the StackWatermarkSet. 712 StackWatermarkSet::after_unwind(current); 713 714 LastFrameAccessor last_frame(current); 715 Handle h_exception(current, exception); 716 methodHandle h_method (current, last_frame.method()); 717 constantPoolHandle h_constants(current, h_method->constants()); 718 bool should_repeat; 719 int handler_bci; 720 int current_bci = last_frame.bci(); 721 722 if (current->frames_to_pop_failed_realloc() > 0) { 723 // Allocation of scalar replaced object used in this frame 724 // failed. Unconditionally pop the frame. 725 current->dec_frames_to_pop_failed_realloc(); 726 current->set_vm_result(h_exception()); 727 // If the method is synchronized we already unlocked the monitor 728 // during deoptimization so the interpreter needs to skip it when 729 // the frame is popped. 730 current->set_do_not_unlock_if_synchronized(true); 731 return Interpreter::remove_activation_entry(); 732 } 733 734 // Need to do this check first since when _do_not_unlock_if_synchronized 735 // is set, we don't want to trigger any classloading which may make calls 736 // into java, or surprisingly find a matching exception handler for bci 0 737 // since at this moment the method hasn't been "officially" entered yet. 738 if (current->do_not_unlock_if_synchronized()) { 739 ResourceMark rm; 740 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); 741 current->set_vm_result(exception); 742 return Interpreter::remove_activation_entry(); 743 } 744 745 do { 746 should_repeat = false; 747 748 // assertions 749 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); 750 // Check that exception is a subclass of Throwable. 751 assert(h_exception->is_a(vmClasses::Throwable_klass()), 752 "Exception not subclass of Throwable"); 753 754 // tracing 755 if (log_is_enabled(Info, exceptions)) { 756 ResourceMark rm(current); 757 stringStream tempst; 758 tempst.print("interpreter method <%s>\n" 759 " at bci %d for thread " INTPTR_FORMAT " (%s)", 760 h_method->print_value_string(), current_bci, p2i(current), current->name()); 761 Exceptions::log_exception(h_exception, tempst.as_string()); 762 } 763 // Don't go paging in something which won't be used. 764 // else if (extable->length() == 0) { 765 // // disabled for now - interpreter is not using shortcut yet 766 // // (shortcut is not to call runtime if we have no exception handlers) 767 // // warning("performance bug: should not call runtime if method has no exception handlers"); 768 // } 769 // for AbortVMOnException flag 770 Exceptions::debug_check_abort(h_exception); 771 772 // exception handler lookup 773 Klass* klass = h_exception->klass(); 774 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD); 775 if (HAS_PENDING_EXCEPTION) { 776 // We threw an exception while trying to find the exception handler. 777 // Transfer the new exception to the exception handle which will 778 // be set into thread local storage, and do another lookup for an 779 // exception handler for this exception, this time starting at the 780 // BCI of the exception handler which caused the exception to be 781 // thrown (bug 4307310). 782 h_exception = Handle(THREAD, PENDING_EXCEPTION); 783 CLEAR_PENDING_EXCEPTION; 784 if (handler_bci >= 0) { 785 current_bci = handler_bci; 786 should_repeat = true; 787 } 788 } 789 } while (should_repeat == true); 790 791 #if INCLUDE_JVMCI 792 if (EnableJVMCI && h_method->method_data() != NULL) { 793 ResourceMark rm(current); 794 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL); 795 if (pdata != NULL && pdata->is_BitData()) { 796 BitData* bit_data = (BitData*) pdata; 797 bit_data->set_exception_seen(); 798 } 799 } 800 #endif 801 802 // notify JVMTI of an exception throw; JVMTI will detect if this is a first 803 // time throw or a stack unwinding throw and accordingly notify the debugger 804 if (JvmtiExport::can_post_on_exceptions()) { 805 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception()); 806 } 807 808 address continuation = NULL; 809 address handler_pc = NULL; 810 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) { 811 // Forward exception to callee (leaving bci/bcp untouched) because (a) no 812 // handler in this method, or (b) after a stack overflow there is not yet 813 // enough stack space available to reprotect the stack. 814 continuation = Interpreter::remove_activation_entry(); 815 #if COMPILER2_OR_JVMCI 816 // Count this for compilation purposes 817 h_method->interpreter_throwout_increment(THREAD); 818 #endif 819 } else { 820 // handler in this method => change bci/bcp to handler bci/bcp and continue there 821 handler_pc = h_method->code_base() + handler_bci; 822 #ifndef ZERO 823 set_bcp_and_mdp(handler_pc, current); 824 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; 825 #else 826 continuation = (address)(intptr_t) handler_bci; 827 #endif 828 } 829 830 // notify debugger of an exception catch 831 // (this is good for exceptions caught in native methods as well) 832 if (JvmtiExport::can_post_on_exceptions()) { 833 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); 834 } 835 836 current->set_vm_result(h_exception()); 837 return continuation; 838 JRT_END 839 840 841 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current)) 842 assert(current->has_pending_exception(), "must only be called if there's an exception pending"); 843 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) 844 JRT_END 845 846 847 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current)) 848 THROW(vmSymbols::java_lang_AbstractMethodError()); 849 JRT_END 850 851 // This method is called from the "abstract_entry" of the interpreter. 852 // At that point, the arguments have already been removed from the stack 853 // and therefore we don't have the receiver object at our fingertips. (Though, 854 // on some platforms the receiver still resides in a register...). Thus, 855 // we have no choice but print an error message not containing the receiver 856 // type. 857 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current, 858 Method* missingMethod)) 859 ResourceMark rm(current); 860 assert(missingMethod != NULL, "sanity"); 861 methodHandle m(current, missingMethod); 862 LinkResolver::throw_abstract_method_error(m, THREAD); 863 JRT_END 864 865 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current, 866 Klass* recvKlass, 867 Method* missingMethod)) 868 ResourceMark rm(current); 869 methodHandle mh = methodHandle(current, missingMethod); 870 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD); 871 JRT_END 872 873 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current)) 874 THROW(vmSymbols::java_lang_InstantiationError()); 875 JRT_END 876 877 878 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current)) 879 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); 880 JRT_END 881 882 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current, 883 Klass* recvKlass, 884 Klass* interfaceKlass)) 885 ResourceMark rm(current); 886 char buf[1000]; 887 buf[0] = '\0'; 888 jio_snprintf(buf, sizeof(buf), 889 "Class %s does not implement the requested interface %s", 890 recvKlass ? recvKlass->external_name() : "NULL", 891 interfaceKlass ? interfaceKlass->external_name() : "NULL"); 892 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 893 JRT_END 894 895 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current)) 896 THROW(vmSymbols::java_lang_NullPointerException()); 897 JRT_END 898 899 //------------------------------------------------------------------------------------------------------------------------ 900 // Fields 901 // 902 903 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) { 904 // resolve field 905 fieldDescriptor info; 906 LastFrameAccessor last_frame(current); 907 constantPoolHandle pool(current, last_frame.method()->constants()); 908 methodHandle m(current, last_frame.method()); 909 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || 910 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield); 911 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); 912 bool is_inline_type = bytecode == Bytecodes::_withfield; 913 914 { 915 JvmtiHideSingleStepping jhss(current); 916 JavaThread* THREAD = current; // For exception macros. 917 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode), 918 m, bytecode, CHECK); 919 } // end JvmtiHideSingleStepping 920 921 // check if link resolution caused cpCache to be updated 922 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 923 if (cp_cache_entry->is_resolved(bytecode)) return; 924 925 // compute auxiliary field attributes 926 TosState state = as_TosState(info.field_type()); 927 928 // Resolution of put instructions on final fields is delayed. That is required so that 929 // exceptions are thrown at the correct place (when the instruction is actually invoked). 930 // If we do not resolve an instruction in the current pass, leaving the put_code 931 // set to zero will cause the next put instruction to the same field to reresolve. 932 933 // Resolution of put instructions to final instance fields with invalid updates (i.e., 934 // to final instance fields with updates originating from a method different than <init>) 935 // is inhibited. A putfield instruction targeting an instance final field must throw 936 // an IllegalAccessError if the instruction is not in an instance 937 // initializer method <init>. If resolution were not inhibited, a putfield 938 // in an initializer method could be resolved in the initializer. Subsequent 939 // putfield instructions to the same field would then use cached information. 940 // As a result, those instructions would not pass through the VM. That is, 941 // checks in resolve_field_access() would not be executed for those instructions 942 // and the required IllegalAccessError would not be thrown. 943 // 944 // Also, we need to delay resolving getstatic and putstatic instructions until the 945 // class is initialized. This is required so that access to the static 946 // field will call the initialization function every time until the class 947 // is completely initialized ala. in 2.17.5 in JVM Specification. 948 InstanceKlass* klass = info.field_holder(); 949 bool uninitialized_static = is_static && !klass->is_initialized(); 950 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 && 951 info.has_initialized_final_update(); 952 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final"); 953 954 Bytecodes::Code get_code = (Bytecodes::Code)0; 955 Bytecodes::Code put_code = (Bytecodes::Code)0; 956 if (!uninitialized_static) { 957 if (is_static) { 958 get_code = Bytecodes::_getstatic; 959 } else { 960 get_code = Bytecodes::_getfield; 961 } 962 if (is_put && is_inline_type) { 963 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield); 964 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) { 965 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); 966 } 967 } 968 969 cp_cache_entry->set_field( 970 get_code, 971 put_code, 972 info.field_holder(), 973 info.index(), 974 info.offset(), 975 state, 976 info.access_flags().is_final(), 977 info.access_flags().is_volatile(), 978 info.is_inlined(), 979 info.signature()->is_Q_signature() && info.is_inline_type() 980 ); 981 } 982 983 984 //------------------------------------------------------------------------------------------------------------------------ 985 // Synchronization 986 // 987 // The interpreter's synchronization code is factored out so that it can 988 // be shared by method invocation and synchronized blocks. 989 //%note synchronization_3 990 991 //%note monitor_1 992 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem)) 993 #ifdef ASSERT 994 current->last_frame().interpreter_frame_verify_monitor(elem); 995 #endif 996 Handle h_obj(current, elem->obj()); 997 assert(Universe::heap()->is_in_or_null(h_obj()), 998 "must be NULL or an object"); 999 ObjectSynchronizer::enter(h_obj, elem->lock(), current); 1000 assert(Universe::heap()->is_in_or_null(elem->obj()), 1001 "must be NULL or an object"); 1002 #ifdef ASSERT 1003 current->last_frame().interpreter_frame_verify_monitor(elem); 1004 #endif 1005 JRT_END 1006 1007 1008 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem)) 1009 oop obj = elem->obj(); 1010 assert(Universe::heap()->is_in(obj), "must be an object"); 1011 // The object could become unlocked through a JNI call, which we have no other checks for. 1012 // Give a fatal message if CheckJNICalls. Otherwise we ignore it. 1013 if (obj->is_unlocked()) { 1014 if (CheckJNICalls) { 1015 fatal("Object has been unlocked by JNI"); 1016 } 1017 return; 1018 } 1019 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current()); 1020 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor 1021 // again at method exit or in the case of an exception. 1022 elem->set_obj(NULL); 1023 JRT_END 1024 1025 1026 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current)) 1027 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); 1028 JRT_END 1029 1030 1031 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current)) 1032 // Returns an illegal exception to install into the current thread. The 1033 // pending_exception flag is cleared so normal exception handling does not 1034 // trigger. Any current installed exception will be overwritten. This 1035 // method will be called during an exception unwind. 1036 1037 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); 1038 Handle exception(current, current->vm_result()); 1039 assert(exception() != NULL, "vm result should be set"); 1040 current->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) 1041 if (!exception->is_a(vmClasses::ThreadDeath_klass())) { 1042 exception = get_preinitialized_exception( 1043 vmClasses::IllegalMonitorStateException_klass(), 1044 CATCH); 1045 } 1046 current->set_vm_result(exception()); 1047 JRT_END 1048 1049 1050 //------------------------------------------------------------------------------------------------------------------------ 1051 // Invokes 1052 1053 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp)) 1054 return method->orig_bytecode_at(method->bci_from(bcp)); 1055 JRT_END 1056 1057 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code)) 1058 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); 1059 JRT_END 1060 1061 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp)) 1062 JvmtiExport::post_raw_breakpoint(current, method, bcp); 1063 JRT_END 1064 1065 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) { 1066 LastFrameAccessor last_frame(current); 1067 // extract receiver from the outgoing argument list if necessary 1068 Handle receiver(current, NULL); 1069 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface || 1070 bytecode == Bytecodes::_invokespecial) { 1071 ResourceMark rm(current); 1072 methodHandle m (current, last_frame.method()); 1073 Bytecode_invoke call(m, last_frame.bci()); 1074 Symbol* signature = call.signature(); 1075 receiver = Handle(current, last_frame.callee_receiver(signature)); 1076 1077 assert(Universe::heap()->is_in_or_null(receiver()), 1078 "sanity check"); 1079 assert(receiver.is_null() || 1080 !Universe::heap()->is_in(receiver->klass()), 1081 "sanity check"); 1082 } 1083 1084 // resolve method 1085 CallInfo info; 1086 constantPoolHandle pool(current, last_frame.method()->constants()); 1087 1088 methodHandle resolved_method; 1089 1090 { 1091 JvmtiHideSingleStepping jhss(current); 1092 JavaThread* THREAD = current; // For exception macros. 1093 LinkResolver::resolve_invoke(info, receiver, pool, 1094 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1095 THREAD); 1096 1097 if (HAS_PENDING_EXCEPTION) { 1098 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) { 1099 // Preserve the original exception across the call to note_trap() 1100 PreserveExceptionMark pm(current); 1101 // Recording the trap will help the compiler to potentially recognize this exception as "hot" 1102 note_trap(current, Deoptimization::Reason_null_check); 1103 } 1104 return; 1105 } 1106 1107 if (JvmtiExport::can_hotswap_or_post_breakpoint() && info.resolved_method()->is_old()) { 1108 resolved_method = methodHandle(current, info.resolved_method()->get_new_method()); 1109 } else { 1110 resolved_method = methodHandle(current, info.resolved_method()); 1111 } 1112 } // end JvmtiHideSingleStepping 1113 1114 // check if link resolution caused cpCache to be updated 1115 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 1116 if (cp_cache_entry->is_resolved(bytecode)) return; 1117 1118 #ifdef ASSERT 1119 if (bytecode == Bytecodes::_invokeinterface) { 1120 if (resolved_method->method_holder() == vmClasses::Object_klass()) { 1121 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec 1122 // (see also CallInfo::set_interface for details) 1123 assert(info.call_kind() == CallInfo::vtable_call || 1124 info.call_kind() == CallInfo::direct_call, ""); 1125 assert(resolved_method->is_final() || info.has_vtable_index(), 1126 "should have been set already"); 1127 } else if (!resolved_method->has_itable_index()) { 1128 // Resolved something like CharSequence.toString. Use vtable not itable. 1129 assert(info.call_kind() != CallInfo::itable_call, ""); 1130 } else { 1131 // Setup itable entry 1132 assert(info.call_kind() == CallInfo::itable_call, ""); 1133 int index = resolved_method->itable_index(); 1134 assert(info.itable_index() == index, ""); 1135 } 1136 } else if (bytecode == Bytecodes::_invokespecial) { 1137 assert(info.call_kind() == CallInfo::direct_call, "must be direct call"); 1138 } else { 1139 assert(info.call_kind() == CallInfo::direct_call || 1140 info.call_kind() == CallInfo::vtable_call, ""); 1141 } 1142 #endif 1143 // Get sender and only set cpCache entry to resolved if it is not an 1144 // interface. The receiver for invokespecial calls within interface 1145 // methods must be checked for every call. 1146 InstanceKlass* sender = pool->pool_holder(); 1147 1148 switch (info.call_kind()) { 1149 case CallInfo::direct_call: 1150 cp_cache_entry->set_direct_call( 1151 bytecode, 1152 resolved_method, 1153 sender->is_interface()); 1154 break; 1155 case CallInfo::vtable_call: 1156 cp_cache_entry->set_vtable_call( 1157 bytecode, 1158 resolved_method, 1159 info.vtable_index()); 1160 break; 1161 case CallInfo::itable_call: 1162 cp_cache_entry->set_itable_call( 1163 bytecode, 1164 info.resolved_klass(), 1165 resolved_method, 1166 info.itable_index()); 1167 break; 1168 default: ShouldNotReachHere(); 1169 } 1170 } 1171 1172 1173 // First time execution: Resolve symbols, create a permanent MethodType object. 1174 void InterpreterRuntime::resolve_invokehandle(JavaThread* current) { 1175 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; 1176 LastFrameAccessor last_frame(current); 1177 1178 // resolve method 1179 CallInfo info; 1180 constantPoolHandle pool(current, last_frame.method()->constants()); 1181 { 1182 JvmtiHideSingleStepping jhss(current); 1183 JavaThread* THREAD = current; // For exception macros. 1184 LinkResolver::resolve_invoke(info, Handle(), pool, 1185 last_frame.get_index_u2_cpcache(bytecode), bytecode, 1186 CHECK); 1187 } // end JvmtiHideSingleStepping 1188 1189 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry(); 1190 cp_cache_entry->set_method_handle(pool, info); 1191 } 1192 1193 // First time execution: Resolve symbols, create a permanent CallSite object. 1194 void InterpreterRuntime::resolve_invokedynamic(JavaThread* current) { 1195 LastFrameAccessor last_frame(current); 1196 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; 1197 1198 // resolve method 1199 CallInfo info; 1200 constantPoolHandle pool(current, last_frame.method()->constants()); 1201 int index = last_frame.get_index_u4(bytecode); 1202 { 1203 JvmtiHideSingleStepping jhss(current); 1204 JavaThread* THREAD = current; // For exception macros. 1205 LinkResolver::resolve_invoke(info, Handle(), pool, 1206 index, bytecode, CHECK); 1207 } // end JvmtiHideSingleStepping 1208 1209 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); 1210 cp_cache_entry->set_dynamic_call(pool, info); 1211 } 1212 1213 // This function is the interface to the assembly code. It returns the resolved 1214 // cpCache entry. This doesn't safepoint, but the helper routines safepoint. 1215 // This function will check for redefinition! 1216 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) { 1217 switch (bytecode) { 1218 case Bytecodes::_getstatic: 1219 case Bytecodes::_putstatic: 1220 case Bytecodes::_getfield: 1221 case Bytecodes::_putfield: 1222 case Bytecodes::_withfield: 1223 resolve_get_put(current, bytecode); 1224 break; 1225 case Bytecodes::_invokevirtual: 1226 case Bytecodes::_invokespecial: 1227 case Bytecodes::_invokestatic: 1228 case Bytecodes::_invokeinterface: 1229 resolve_invoke(current, bytecode); 1230 break; 1231 case Bytecodes::_invokehandle: 1232 resolve_invokehandle(current); 1233 break; 1234 case Bytecodes::_invokedynamic: 1235 resolve_invokedynamic(current); 1236 break; 1237 default: 1238 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); 1239 break; 1240 } 1241 } 1242 JRT_END 1243 1244 //------------------------------------------------------------------------------------------------------------------------ 1245 // Miscellaneous 1246 1247 1248 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) { 1249 // Enable WXWrite: the function is called directly by interpreter. 1250 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current)); 1251 1252 // frequency_counter_overflow_inner can throw async exception. 1253 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp); 1254 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); 1255 if (branch_bcp != NULL && nm != NULL) { 1256 // This was a successful request for an OSR nmethod. Because 1257 // frequency_counter_overflow_inner ends with a safepoint check, 1258 // nm could have been unloaded so look it up again. It's unsafe 1259 // to examine nm directly since it might have been freed and used 1260 // for something else. 1261 LastFrameAccessor last_frame(current); 1262 Method* method = last_frame.method(); 1263 int bci = method->bci_from(last_frame.bcp()); 1264 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); 1265 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod(); 1266 if (nm != NULL && bs_nm != NULL) { 1267 // in case the transition passed a safepoint we need to barrier this again 1268 if (!bs_nm->nmethod_osr_entry_barrier(nm)) { 1269 nm = NULL; 1270 } 1271 } 1272 } 1273 if (nm != NULL && current->is_interp_only_mode()) { 1274 // Normally we never get an nm if is_interp_only_mode() is true, because 1275 // policy()->event has a check for this and won't compile the method when 1276 // true. However, it's possible for is_interp_only_mode() to become true 1277 // during the compilation. We don't want to return the nm in that case 1278 // because we want to continue to execute interpreted. 1279 nm = NULL; 1280 } 1281 #ifndef PRODUCT 1282 if (TraceOnStackReplacement) { 1283 if (nm != NULL) { 1284 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); 1285 nm->print(); 1286 } 1287 } 1288 #endif 1289 return nm; 1290 } 1291 1292 JRT_ENTRY(nmethod*, 1293 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp)) 1294 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized 1295 // flag, in case this method triggers classloading which will call into Java. 1296 UnlockFlagSaver fs(current); 1297 1298 LastFrameAccessor last_frame(current); 1299 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1300 methodHandle method(current, last_frame.method()); 1301 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; 1302 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci; 1303 1304 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, NULL, CHECK_NULL); 1305 1306 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod(); 1307 if (osr_nm != NULL && bs_nm != NULL) { 1308 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) { 1309 osr_nm = NULL; 1310 } 1311 } 1312 return osr_nm; 1313 JRT_END 1314 1315 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) 1316 assert(ProfileInterpreter, "must be profiling interpreter"); 1317 int bci = method->bci_from(cur_bcp); 1318 MethodData* mdo = method->method_data(); 1319 if (mdo == NULL) return 0; 1320 return mdo->bci_to_di(bci); 1321 JRT_END 1322 1323 #ifdef ASSERT 1324 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) 1325 assert(ProfileInterpreter, "must be profiling interpreter"); 1326 1327 MethodData* mdo = method->method_data(); 1328 assert(mdo != NULL, "must not be null"); 1329 1330 int bci = method->bci_from(bcp); 1331 1332 address mdp2 = mdo->bci_to_dp(bci); 1333 if (mdp != mdp2) { 1334 ResourceMark rm; 1335 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); 1336 int current_di = mdo->dp_to_di(mdp); 1337 int expected_di = mdo->dp_to_di(mdp2); 1338 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); 1339 int expected_approx_bci = mdo->data_at(expected_di)->bci(); 1340 int approx_bci = -1; 1341 if (current_di >= 0) { 1342 approx_bci = mdo->data_at(current_di)->bci(); 1343 } 1344 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); 1345 mdo->print_on(tty); 1346 method->print_codes(); 1347 } 1348 assert(mdp == mdp2, "wrong mdp"); 1349 JRT_END 1350 #endif // ASSERT 1351 1352 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci)) 1353 assert(ProfileInterpreter, "must be profiling interpreter"); 1354 ResourceMark rm(current); 1355 LastFrameAccessor last_frame(current); 1356 assert(last_frame.is_interpreted_frame(), "must come from interpreter"); 1357 MethodData* h_mdo = last_frame.method()->method_data(); 1358 1359 // Grab a lock to ensure atomic access to setting the return bci and 1360 // the displacement. This can block and GC, invalidating all naked oops. 1361 MutexLocker ml(RetData_lock); 1362 1363 // ProfileData is essentially a wrapper around a derived oop, so we 1364 // need to take the lock before making any ProfileData structures. 1365 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp())); 1366 guarantee(data != NULL, "profile data must be valid"); 1367 RetData* rdata = data->as_RetData(); 1368 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); 1369 last_frame.set_mdp(new_mdp); 1370 JRT_END 1371 1372 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m)) 1373 return Method::build_method_counters(current, m); 1374 JRT_END 1375 1376 1377 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current)) 1378 // We used to need an explict preserve_arguments here for invoke bytecodes. However, 1379 // stack traversal automatically takes care of preserving arguments for invoke, so 1380 // this is no longer needed. 1381 1382 // JRT_END does an implicit safepoint check, hence we are guaranteed to block 1383 // if this is called during a safepoint 1384 1385 if (JvmtiExport::should_post_single_step()) { 1386 // This function is called by the interpreter when single stepping. Such single 1387 // stepping could unwind a frame. Then, it is important that we process any frames 1388 // that we might return into. 1389 StackWatermarkSet::before_unwind(current); 1390 1391 // We are called during regular safepoints and when the VM is 1392 // single stepping. If any thread is marked for single stepping, 1393 // then we may have JVMTI work to do. 1394 LastFrameAccessor last_frame(current); 1395 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp()); 1396 } 1397 JRT_END 1398 1399 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current)) 1400 // This function is called by the interpreter when the return poll found a reason 1401 // to call the VM. The reason could be that we are returning into a not yet safe 1402 // to access frame. We handle that below. 1403 // Note that this path does not check for single stepping, because we do not want 1404 // to single step when unwinding frames for an exception being thrown. Instead, 1405 // such single stepping code will use the safepoint table, which will use the 1406 // InterpreterRuntime::at_safepoint callback. 1407 StackWatermarkSet::before_unwind(current); 1408 JRT_END 1409 1410 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj, 1411 ConstantPoolCacheEntry *cp_entry)) 1412 1413 // check the access_flags for the field in the klass 1414 1415 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); 1416 int index = cp_entry->field_index(); 1417 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; 1418 1419 bool is_static = (obj == NULL); 1420 bool is_inlined = cp_entry->is_inlined(); 1421 HandleMark hm(current); 1422 1423 Handle h_obj; 1424 if (!is_static) { 1425 // non-static field accessors have an object, but we need a handle 1426 h_obj = Handle(current, obj); 1427 } 1428 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass()); 1429 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static, is_inlined); 1430 LastFrameAccessor last_frame(current); 1431 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid); 1432 JRT_END 1433 1434 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj, 1435 ConstantPoolCacheEntry *cp_entry, jvalue *value)) 1436 1437 Klass* k = cp_entry->f1_as_klass(); 1438 1439 // check the access_flags for the field in the klass 1440 InstanceKlass* ik = InstanceKlass::cast(k); 1441 int index = cp_entry->field_index(); 1442 // bail out if field modifications are not watched 1443 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; 1444 1445 char sig_type = '\0'; 1446 1447 switch(cp_entry->flag_state()) { 1448 case btos: sig_type = JVM_SIGNATURE_BYTE; break; 1449 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break; 1450 case ctos: sig_type = JVM_SIGNATURE_CHAR; break; 1451 case stos: sig_type = JVM_SIGNATURE_SHORT; break; 1452 case itos: sig_type = JVM_SIGNATURE_INT; break; 1453 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break; 1454 case atos: sig_type = JVM_SIGNATURE_CLASS; break; 1455 case ltos: sig_type = JVM_SIGNATURE_LONG; break; 1456 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break; 1457 default: ShouldNotReachHere(); return; 1458 } 1459 1460 // Both Q-signatures and L-signatures are mapped to atos 1461 if (cp_entry->flag_state() == atos && ik->field_signature(index)->is_Q_signature()) { 1462 sig_type = JVM_SIGNATURE_PRIMITIVE_OBJECT; 1463 } 1464 1465 bool is_static = (obj == NULL); 1466 bool is_inlined = cp_entry->is_inlined(); 1467 1468 HandleMark hm(current); 1469 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static, is_inlined); 1470 jvalue fvalue; 1471 #ifdef _LP64 1472 fvalue = *value; 1473 #else 1474 // Long/double values are stored unaligned and also noncontiguously with 1475 // tagged stacks. We can't just do a simple assignment even in the non- 1476 // J/D cases because a C++ compiler is allowed to assume that a jvalue is 1477 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. 1478 // We assume that the two halves of longs/doubles are stored in interpreter 1479 // stack slots in platform-endian order. 1480 jlong_accessor u; 1481 jint* newval = (jint*)value; 1482 u.words[0] = newval[0]; 1483 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag 1484 fvalue.j = u.long_value; 1485 #endif // _LP64 1486 1487 Handle h_obj; 1488 if (!is_static) { 1489 // non-static field accessors have an object, but we need a handle 1490 h_obj = Handle(current, obj); 1491 } 1492 1493 LastFrameAccessor last_frame(current); 1494 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj, 1495 fid, sig_type, &fvalue); 1496 JRT_END 1497 1498 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current)) 1499 LastFrameAccessor last_frame(current); 1500 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame()); 1501 JRT_END 1502 1503 1504 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop 1505 // before transitioning to VM, and restore it after transitioning back 1506 // to Java. The return oop at the top-of-stack, is not walked by the GC. 1507 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current)) 1508 LastFrameAccessor last_frame(current); 1509 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame()); 1510 JRT_END 1511 1512 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) 1513 { 1514 return (Interpreter::contains(pc) ? 1 : 0); 1515 } 1516 JRT_END 1517 1518 1519 // Implementation of SignatureHandlerLibrary 1520 1521 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS 1522 // Dummy definition (else normalization method is defined in CPU 1523 // dependant code) 1524 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { 1525 return fingerprint; 1526 } 1527 #endif 1528 1529 address SignatureHandlerLibrary::set_handler_blob() { 1530 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); 1531 if (handler_blob == NULL) { 1532 return NULL; 1533 } 1534 address handler = handler_blob->code_begin(); 1535 _handler_blob = handler_blob; 1536 _handler = handler; 1537 return handler; 1538 } 1539 1540 void SignatureHandlerLibrary::initialize() { 1541 if (_fingerprints != NULL) { 1542 return; 1543 } 1544 if (set_handler_blob() == NULL) { 1545 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); 1546 } 1547 1548 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", 1549 SignatureHandlerLibrary::buffer_size); 1550 _buffer = bb->code_begin(); 1551 1552 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, mtCode); 1553 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, mtCode); 1554 } 1555 1556 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { 1557 address handler = _handler; 1558 int insts_size = buffer->pure_insts_size(); 1559 if (handler + insts_size > _handler_blob->code_end()) { 1560 // get a new handler blob 1561 handler = set_handler_blob(); 1562 } 1563 if (handler != NULL) { 1564 memcpy(handler, buffer->insts_begin(), insts_size); 1565 pd_set_handler(handler); 1566 ICache::invalidate_range(handler, insts_size); 1567 _handler = handler + insts_size; 1568 } 1569 return handler; 1570 } 1571 1572 void SignatureHandlerLibrary::add(const methodHandle& method) { 1573 if (method->signature_handler() == NULL) { 1574 // use slow signature handler if we can't do better 1575 int handler_index = -1; 1576 // check if we can use customized (fast) signature handler 1577 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) { 1578 // use customized signature handler 1579 MutexLocker mu(SignatureHandlerLibrary_lock); 1580 // make sure data structure is initialized 1581 initialize(); 1582 // lookup method signature's fingerprint 1583 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1584 // allow CPU dependant code to optimize the fingerprints for the fast handler 1585 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1586 handler_index = _fingerprints->find(fingerprint); 1587 // create handler if necessary 1588 if (handler_index < 0) { 1589 ResourceMark rm; 1590 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer; 1591 CodeBuffer buffer((address)(_buffer + align_offset), 1592 SignatureHandlerLibrary::buffer_size - align_offset); 1593 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); 1594 // copy into code heap 1595 address handler = set_handler(&buffer); 1596 if (handler == NULL) { 1597 // use slow signature handler (without memorizing it in the fingerprints) 1598 } else { 1599 // debugging suppport 1600 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1601 ttyLocker ttyl; 1602 tty->cr(); 1603 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", 1604 _handlers->length(), 1605 (method->is_static() ? "static" : "receiver"), 1606 method->name_and_sig_as_C_string(), 1607 fingerprint, 1608 buffer.insts_size()); 1609 if (buffer.insts_size() > 0) { 1610 Disassembler::decode(handler, handler + buffer.insts_size(), tty 1611 NOT_PRODUCT(COMMA &buffer.asm_remarks())); 1612 } 1613 #ifndef PRODUCT 1614 address rh_begin = Interpreter::result_handler(method()->result_type()); 1615 if (CodeCache::contains(rh_begin)) { 1616 // else it might be special platform dependent values 1617 tty->print_cr(" --- associated result handler ---"); 1618 address rh_end = rh_begin; 1619 while (*(int*)rh_end != 0) { 1620 rh_end += sizeof(int); 1621 } 1622 Disassembler::decode(rh_begin, rh_end); 1623 } else { 1624 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); 1625 } 1626 #endif 1627 } 1628 // add handler to library 1629 _fingerprints->append(fingerprint); 1630 _handlers->append(handler); 1631 // set handler index 1632 assert(_fingerprints->length() == _handlers->length(), "sanity check"); 1633 handler_index = _fingerprints->length() - 1; 1634 } 1635 } 1636 // Set handler under SignatureHandlerLibrary_lock 1637 if (handler_index < 0) { 1638 // use generic signature handler 1639 method->set_signature_handler(Interpreter::slow_signature_handler()); 1640 } else { 1641 // set handler 1642 method->set_signature_handler(_handlers->at(handler_index)); 1643 } 1644 } else { 1645 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint()); 1646 // use generic signature handler 1647 method->set_signature_handler(Interpreter::slow_signature_handler()); 1648 } 1649 } 1650 #ifdef ASSERT 1651 int handler_index = -1; 1652 int fingerprint_index = -2; 1653 { 1654 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized 1655 // in any way if accessed from multiple threads. To avoid races with another 1656 // thread which may change the arrays in the above, mutex protected block, we 1657 // have to protect this read access here with the same mutex as well! 1658 MutexLocker mu(SignatureHandlerLibrary_lock); 1659 if (_handlers != NULL) { 1660 handler_index = _handlers->find(method->signature_handler()); 1661 uint64_t fingerprint = Fingerprinter(method).fingerprint(); 1662 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1663 fingerprint_index = _fingerprints->find(fingerprint); 1664 } 1665 } 1666 assert(method->signature_handler() == Interpreter::slow_signature_handler() || 1667 handler_index == fingerprint_index, "sanity check"); 1668 #endif // ASSERT 1669 } 1670 1671 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { 1672 int handler_index = -1; 1673 // use customized signature handler 1674 MutexLocker mu(SignatureHandlerLibrary_lock); 1675 // make sure data structure is initialized 1676 initialize(); 1677 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); 1678 handler_index = _fingerprints->find(fingerprint); 1679 // create handler if necessary 1680 if (handler_index < 0) { 1681 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { 1682 tty->cr(); 1683 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, 1684 _handlers->length(), 1685 p2i(handler), 1686 fingerprint); 1687 } 1688 _fingerprints->append(fingerprint); 1689 _handlers->append(handler); 1690 } else { 1691 if (PrintSignatureHandlers) { 1692 tty->cr(); 1693 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", 1694 _handlers->length(), 1695 fingerprint, 1696 p2i(_handlers->at(handler_index)), 1697 p2i(handler)); 1698 } 1699 } 1700 } 1701 1702 1703 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; 1704 address SignatureHandlerLibrary::_handler = NULL; 1705 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; 1706 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; 1707 address SignatureHandlerLibrary::_buffer = NULL; 1708 1709 1710 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method)) 1711 methodHandle m(current, method); 1712 assert(m->is_native(), "sanity check"); 1713 // lookup native function entry point if it doesn't exist 1714 if (!m->has_native_function()) { 1715 NativeLookup::lookup(m, CHECK); 1716 } 1717 // make sure signature handler is installed 1718 SignatureHandlerLibrary::add(m); 1719 // The interpreter entry point checks the signature handler first, 1720 // before trying to fetch the native entry point and klass mirror. 1721 // We must set the signature handler last, so that multiple processors 1722 // preparing the same method will be sure to see non-null entry & mirror. 1723 JRT_END 1724 1725 #if defined(IA32) || defined(AMD64) || defined(ARM) 1726 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address)) 1727 if (src_address == dest_address) { 1728 return; 1729 } 1730 ResourceMark rm; 1731 LastFrameAccessor last_frame(current); 1732 assert(last_frame.is_interpreted_frame(), ""); 1733 jint bci = last_frame.bci(); 1734 methodHandle mh(current, last_frame.method()); 1735 Bytecode_invoke invoke(mh, bci); 1736 ArgumentSizeComputer asc(invoke.signature()); 1737 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver 1738 Copy::conjoint_jbytes(src_address, dest_address, 1739 size_of_arguments * Interpreter::stackElementSize); 1740 JRT_END 1741 #endif 1742 1743 #if INCLUDE_JVMTI 1744 // This is a support of the JVMTI PopFrame interface. 1745 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument 1746 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. 1747 // The member_name argument is a saved reference (in local#0) to the member_name. 1748 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. 1749 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. 1750 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name, 1751 Method* method, address bcp)) 1752 Bytecodes::Code code = Bytecodes::code_at(method, bcp); 1753 if (code != Bytecodes::_invokestatic) { 1754 return; 1755 } 1756 ConstantPool* cpool = method->constants(); 1757 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; 1758 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); 1759 Symbol* mname = cpool->name_ref_at(cp_index); 1760 1761 if (MethodHandles::has_member_arg(cname, mname)) { 1762 oop member_name_oop = cast_to_oop(member_name); 1763 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { 1764 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. 1765 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); 1766 } 1767 current->set_vm_result(member_name_oop); 1768 } else { 1769 current->set_vm_result(NULL); 1770 } 1771 JRT_END 1772 #endif // INCLUDE_JVMTI 1773 1774 #ifndef PRODUCT 1775 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to 1776 // call this, which changes rsp and makes the interpreter's expression stack not walkable. 1777 // The generated code still uses call_VM because that will set up the frame pointer for 1778 // bcp and method. 1779 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) 1780 LastFrameAccessor last_frame(current); 1781 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame"); 1782 methodHandle mh(current, last_frame.method()); 1783 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2); 1784 return preserve_this_value; 1785 JRT_END 1786 #endif // !PRODUCT