1 /*
2 * Copyright (c) 1997, 2023, 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/vmClasses.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "code/codeCache.hpp"
32 #include "compiler/compilationPolicy.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "compiler/disassembler.hpp"
35 #include "gc/shared/barrierSetNMethod.hpp"
36 #include "gc/shared/collectedHeap.hpp"
37 #include "interpreter/bytecodeTracer.hpp"
38 #include "interpreter/interpreter.hpp"
39 #include "interpreter/interpreterRuntime.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "interpreter/templateTable.hpp"
42 #include "jvm_io.h"
43 #include "logging/log.hpp"
44 #include "memory/oopFactory.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/constantPool.inline.hpp"
48 #include "oops/cpCache.inline.hpp"
49 #include "oops/flatArrayKlass.hpp"
50 #include "oops/flatArrayOop.inline.hpp"
51 #include "oops/inlineKlass.inline.hpp"
52 #include "oops/instanceKlass.inline.hpp"
53 #include "oops/klass.inline.hpp"
54 #include "oops/methodData.hpp"
55 #include "oops/method.inline.hpp"
56 #include "oops/objArrayKlass.hpp"
57 #include "oops/objArrayOop.inline.hpp"
58 #include "oops/oop.inline.hpp"
59 #include "oops/symbol.hpp"
60 #include "prims/jvmtiExport.hpp"
61 #include "prims/methodHandles.hpp"
62 #include "prims/nativeLookup.hpp"
63 #include "runtime/atomic.hpp"
64 #include "runtime/continuation.hpp"
65 #include "runtime/deoptimization.hpp"
66 #include "runtime/fieldDescriptor.inline.hpp"
67 #include "runtime/frame.inline.hpp"
68 #include "runtime/handles.inline.hpp"
69 #include "runtime/icache.hpp"
70 #include "runtime/interfaceSupport.inline.hpp"
71 #include "runtime/java.hpp"
72 #include "runtime/javaCalls.hpp"
73 #include "runtime/jfieldIDWorkaround.hpp"
74 #include "runtime/osThread.hpp"
75 #include "runtime/sharedRuntime.hpp"
76 #include "runtime/stackWatermarkSet.hpp"
77 #include "runtime/stubRoutines.hpp"
78 #include "runtime/synchronizer.hpp"
79 #include "runtime/threadCritical.hpp"
80 #include "utilities/align.hpp"
81 #include "utilities/checkedCast.hpp"
82 #include "utilities/copy.hpp"
83 #include "utilities/events.hpp"
84 #include "utilities/globalDefinitions.hpp"
85 #ifdef COMPILER2
86 #include "opto/runtime.hpp"
87 #endif
88
89 // Helper class to access current interpreter state
90 class LastFrameAccessor : public StackObj {
91 frame _last_frame;
92 public:
93 LastFrameAccessor(JavaThread* current) {
94 assert(current == Thread::current(), "sanity");
95 _last_frame = current->last_frame();
96 }
97 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
98 Method* method() const { return _last_frame.interpreter_frame_method(); }
99 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
100 int bci() const { return _last_frame.interpreter_frame_bci(); }
101 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
102
103 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
104 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
105
106 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
107 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
108
109 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
110 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
111 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
112 int get_index_u2_cpcache(Bytecodes::Code bc) const
113 { return bytecode().get_index_u2_cpcache(bc); }
114 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
115 int number_of_dimensions() const { return bcp()[3]; }
116 ConstantPoolCacheEntry* cache_entry_at(int i) const
117 { return method()->constants()->cache()->entry_at(i); }
118 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
119
120 oop callee_receiver(Symbol* signature) {
121 return _last_frame.interpreter_callee_receiver(signature);
122 }
123 BasicObjectLock* monitor_begin() const {
124 return _last_frame.interpreter_frame_monitor_begin();
125 }
126 BasicObjectLock* monitor_end() const {
127 return _last_frame.interpreter_frame_monitor_end();
128 }
129 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
130 return _last_frame.next_monitor_in_interpreter_frame(current);
131 }
132
133 frame& get_frame() { return _last_frame; }
134 };
135
136 //------------------------------------------------------------------------------------------------------------------------
137 // State accessors
138
139 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
140 LastFrameAccessor last_frame(current);
141 last_frame.set_bcp(bcp);
142 if (ProfileInterpreter) {
143 // ProfileTraps uses MDOs independently of ProfileInterpreter.
144 // That is why we must check both ProfileInterpreter and mdo != nullptr.
145 MethodData* mdo = last_frame.method()->method_data();
146 if (mdo != nullptr) {
147 NEEDS_CLEANUP;
148 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
149 }
150 }
151 }
152
153 //------------------------------------------------------------------------------------------------------------------------
154 // Constants
155
156
157 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
158 // access constant pool
159 LastFrameAccessor last_frame(current);
160 ConstantPool* pool = last_frame.method()->constants();
161 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
162 constantTag tag = pool->tag_at(cp_index);
163
164 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
165 Klass* klass = pool->klass_at(cp_index, CHECK);
166 oop java_class = tag.is_Qdescriptor_klass()
167 ? InlineKlass::cast(klass)->val_mirror()
168 : klass->java_mirror();
169 current->set_vm_result(java_class);
170 JRT_END
171
172 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
173 assert(bytecode == Bytecodes::_ldc ||
174 bytecode == Bytecodes::_ldc_w ||
175 bytecode == Bytecodes::_ldc2_w ||
176 bytecode == Bytecodes::_fast_aldc ||
177 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
178 ResourceMark rm(current);
179 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
180 bytecode == Bytecodes::_fast_aldc_w);
181 LastFrameAccessor last_frame(current);
182 methodHandle m (current, last_frame.method());
183 Bytecode_loadconstant ldc(m, last_frame.bci());
184
185 // Double-check the size. (Condy can have any type.)
186 BasicType type = ldc.result_type();
187 switch (type2size[type]) {
188 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
189 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
190 default: ShouldNotReachHere();
191 }
192
193 // Resolve the constant. This does not do unboxing.
194 // But it does replace Universe::the_null_sentinel by null.
195 oop result = ldc.resolve_constant(CHECK);
196 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
197
198 #ifdef ASSERT
199 {
200 // The bytecode wrappers aren't GC-safe so construct a new one
201 Bytecode_loadconstant ldc2(m, last_frame.bci());
202 int rindex = ldc2.cache_index();
203 if (rindex < 0)
204 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
205 if (rindex >= 0) {
206 oop coop = m->constants()->resolved_reference_at(rindex);
207 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
208 assert(roop == coop, "expected result for assembly code");
209 }
210 }
211 #endif
212 current->set_vm_result(result);
213 if (!is_fast_aldc) {
214 // Tell the interpreter how to unbox the primitive.
215 guarantee(java_lang_boxing_object::is_instance(result, type), "");
216 int offset = java_lang_boxing_object::value_offset(type);
217 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
218 | (offset & ConstantPoolCacheEntry::field_index_mask));
219 current->set_vm_result_2((Metadata*)flags);
220 }
221 }
222 JRT_END
223
224
225 //------------------------------------------------------------------------------------------------------------------------
226 // Allocation
227
228 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
229 Klass* k = pool->klass_at(index, CHECK);
230 InstanceKlass* klass = InstanceKlass::cast(k);
231
232 if (klass->is_inline_klass()) {
233 THROW(vmSymbols::java_lang_InstantiationError());
234 }
235
236 // Make sure we are not instantiating an abstract klass
237 klass->check_valid_for_instantiation(true, CHECK);
238
239 // Make sure klass is initialized
240 klass->initialize(CHECK);
241
242 // At this point the class may not be fully initialized
243 // because of recursive initialization. If it is fully
244 // initialized & has_finalized is not set, we rewrite
245 // it into its fast version (Note: no locking is needed
246 // here since this is an atomic byte write and can be
247 // done more than once).
248 //
249 // Note: In case of classes with has_finalized we don't
250 // rewrite since that saves us an extra check in
251 // the fast version which then would call the
252 // slow version anyway (and do a call back into
253 // Java).
254 // If we have a breakpoint, then we don't rewrite
255 // because the _breakpoint bytecode would be lost.
256 oop obj = klass->allocate_instance(CHECK);
257 current->set_vm_result(obj);
258 JRT_END
259
260 JRT_ENTRY(void, InterpreterRuntime::aconst_init(JavaThread* current, ConstantPool* pool, int index))
261 // Getting the InlineKlass
262 Klass* k = pool->klass_at(index, CHECK);
263 if (!k->is_inline_klass()) {
264 // inconsistency with 'new' which throws an InstantiationError
265 // in the future, aconst_init will just return null instead of throwing an exception
266 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
267 }
268 assert(k->is_inline_klass(), "aconst_init argument must be the inline type class");
269 InlineKlass* vklass = InlineKlass::cast(k);
270
271 vklass->initialize(CHECK);
272 oop res = vklass->default_value();
273 current->set_vm_result(res);
274 JRT_END
275
276 JRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* current, ResolvedFieldEntry* entry, uintptr_t ptr))
277 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
278 oop obj = nullptr;
279 int recv_offset = type2size[as_BasicType((TosState)entry->tos_state())];
280 assert(frame::interpreter_frame_expression_stack_direction() == -1, "currently is -1 on all platforms");
281 int ret_adj = (recv_offset + type2size[T_OBJECT] )* AbstractInterpreter::stackElementSize;
282 int offset = entry->field_offset();
283 obj = (oopDesc*)(((uintptr_t*)ptr)[recv_offset * Interpreter::stackElementWords]);
284 if (obj == nullptr) {
285 THROW_(vmSymbols::java_lang_NullPointerException(), ret_adj);
286 }
287 assert(oopDesc::is_oop(obj), "Verifying receiver");
288 assert(obj->klass()->is_inline_klass(), "Must have been checked during resolution");
289 instanceHandle old_value_h(THREAD, (instanceOop)obj);
290 oop ref = nullptr;
291 if (entry->tos_state() == atos) {
292 ref = *(oopDesc**)ptr;
293 }
294 Handle ref_h(THREAD, ref);
295 InlineKlass* ik = InlineKlass::cast(old_value_h()->klass());
296 // Ensure that the class is initialized or being initialized
297 // If the class is in error state, the creation of a new value should not be allowed
298 ik->initialize(CHECK_(ret_adj));
299
300 bool can_skip = false;
301 switch(entry->tos_state()) {
302 case ztos:
303 if (old_value_h()->bool_field(offset) == (jboolean)(*(jint*)ptr)) can_skip = true;
304 break;
305 case btos:
306 if (old_value_h()->byte_field(offset) == (jbyte)(*(jint*)ptr)) can_skip = true;
307 break;
308 case ctos:
309 if (old_value_h()->char_field(offset) == (jchar)(*(jint*)ptr)) can_skip = true;
310 break;
311 case stos:
312 if (old_value_h()->short_field(offset) == (jshort)(*(jint*)ptr)) can_skip = true;
313 break;
314 case itos:
315 if (old_value_h()->int_field(offset) == *(jint*)ptr) can_skip = true;
316 break;
317 case ltos:
318 if (old_value_h()->long_field(offset) == *(jlong*)ptr) can_skip = true;
319 break;
320 case ftos:
321 if (memcmp(old_value_h()->field_addr<jfloat>(offset), (jfloat*)ptr, sizeof(jfloat)) == 0) can_skip = true;
322 break;
323 case dtos:
324 if (memcmp(old_value_h()->field_addr<jdouble>(offset), (jdouble*)ptr, sizeof(jdouble)) == 0) can_skip = true;
325 break;
326 case atos:
327 if (!entry->is_flat() && old_value_h()->obj_field(offset) == ref_h()) can_skip = true;
328 break;
329 default:
330 break;
331 }
332 if (can_skip) {
333 current->set_vm_result(old_value_h());
334 return ret_adj;
335 }
336
337 instanceOop new_value = ik->allocate_instance_buffer(CHECK_(ret_adj));
338 Handle new_value_h = Handle(THREAD, new_value);
339 ik->inline_copy_oop_to_new_oop(old_value_h(), new_value_h());
340 switch(entry->tos_state()) {
341 case ztos:
342 new_value_h()->bool_field_put(offset, (jboolean)(*(jint*)ptr));
343 break;
344 case btos:
345 new_value_h()->byte_field_put(offset, (jbyte)(*(jint*)ptr));
346 break;
347 case ctos:
348 new_value_h()->char_field_put(offset, (jchar)(*(jint*)ptr));
349 break;
350 case stos:
351 new_value_h()->short_field_put(offset, (jshort)(*(jint*)ptr));
352 break;
353 case itos:
354 new_value_h()->int_field_put(offset, (*(jint*)ptr));
355 break;
356 case ltos:
357 new_value_h()->long_field_put(offset, *(jlong*)ptr);
358 break;
359 case ftos:
360 new_value_h()->float_field_put(offset, *(jfloat*)ptr);
361 break;
362 case dtos:
363 new_value_h()->double_field_put(offset, *(jdouble*)ptr);
364 break;
365 case atos:
366 {
367 if (entry->is_null_free_inline_type()) {
368 if (!entry->is_flat()) {
369 if (ref_h() == nullptr) {
370 THROW_(vmSymbols::java_lang_NullPointerException(), ret_adj);
371 }
372 new_value_h()->obj_field_put(offset, ref_h());
373 } else {
374 int field_index = entry->field_index();
375 InlineKlass* field_ik = InlineKlass::cast(ik->get_inline_type_field_klass(field_index));
376 field_ik->write_flat_field(new_value_h(), offset, ref_h(), CHECK_(ret_adj));
377 }
378 } else {
379 new_value_h()->obj_field_put(offset, ref_h());
380 }
381 }
382 break;
383 default:
384 ShouldNotReachHere();
385 }
386 current->set_vm_result(new_value_h());
387 return ret_adj;
388 JRT_END
389
390 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_inline_type_field(JavaThread* current, oopDesc* mirror, ResolvedFieldEntry* entry))
391 // The interpreter tries to access an inline static field that has not been initialized.
392 // This situation can happen in different scenarios:
393 // 1 - if the load or initialization of the field failed during step 8 of
394 // the initialization of the holder of the field, in this case the access to the field
395 // must fail
396 // 2 - it can also happen when the initialization of the holder class triggered the initialization of
397 // another class which accesses this field in its static initializer, in this case the
398 // access must succeed to allow circularity
399 // The code below tries to load and initialize the field's class again before returning the default value.
400 // If the field was not initialized because of an error, an exception should be thrown.
401 // If the class is being initialized, the default value is returned.
402 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
403 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
404 InstanceKlass* klass = entry->field_holder();
405 u2 index = entry->field_index();
406 assert(klass == java_lang_Class::as_Klass(mirror), "Not the field holder klass");
407 assert(klass->field_is_null_free_inline_type(index), "Sanity check");
408 if (klass->is_being_initialized() && klass->is_init_thread(THREAD)) {
409 int offset = klass->field_offset(index);
410 Klass* field_k = klass->get_inline_type_field_klass_or_null(index);
411 if (field_k == nullptr) {
412 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD),
413 Handle(THREAD, klass->class_loader()),
414 Handle(THREAD, klass->protection_domain()),
415 true, CHECK);
416 assert(field_k != nullptr, "Should have been loaded or an exception thrown above");
417 klass->set_inline_type_field_klass(index, field_k);
418 }
419 field_k->initialize(CHECK);
420 oop defaultvalue = InlineKlass::cast(field_k)->default_value();
421 // It is safe to initialize the static field because 1) the current thread is the initializing thread
422 // and is the only one that can access it, and 2) the field is actually not initialized (i.e. null)
423 // otherwise the JVM should not be executing this code.
424 mirror_h()->obj_field_put(offset, defaultvalue);
425 current->set_vm_result(defaultvalue);
426 } else {
427 assert(klass->is_in_error_state(), "If not initializing, initialization must have failed to get there");
428 ResourceMark rm(THREAD);
429 const char* desc = "Could not initialize class ";
430 const char* className = klass->external_name();
431 size_t msglen = strlen(desc) + strlen(className) + 1;
432 char* message = NEW_RESOURCE_ARRAY(char, msglen);
433 if (nullptr == message) {
434 // Out of memory: can't create detailed error message
435 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);
436 } else {
437 jio_snprintf(message, msglen, "%s%s", desc, className);
438 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message);
439 }
440 }
441 JRT_END
442
443 JRT_ENTRY(void, InterpreterRuntime::read_flat_field(JavaThread* current, oopDesc* obj, int index, Klass* field_holder))
444 Handle obj_h(THREAD, obj);
445
446 assert(oopDesc::is_oop(obj), "Sanity check");
447
448 assert(field_holder->is_instance_klass(), "Sanity check");
449 InstanceKlass* klass = InstanceKlass::cast(field_holder);
450
451 assert(klass->field_is_flat(index), "Sanity check");
452
453 InlineKlass* field_vklass = InlineKlass::cast(klass->get_inline_type_field_klass(index));
454
455 oop res = field_vklass->read_flat_field(obj_h(), klass->field_offset(index), CHECK);
456 current->set_vm_result(res);
457 JRT_END
458
459 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
460 oop obj = oopFactory::new_typeArray(type, size, CHECK);
461 current->set_vm_result(obj);
462 JRT_END
463
464
465 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
466 Klass* klass = pool->klass_at(index, CHECK);
467 bool is_qtype_desc = pool->tag_at(index).is_Qdescriptor_klass();
468 arrayOop obj;
469 if ((!klass->is_array_klass()) && is_qtype_desc) { // Logically creates elements, ensure klass init
470 klass->initialize(CHECK);
471 obj = oopFactory::new_valueArray(klass, size, CHECK);
472 } else {
473 obj = oopFactory::new_objArray(klass, size, CHECK);
474 }
475 current->set_vm_result(obj);
476 JRT_END
477
478 JRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* current, arrayOopDesc* array, int index))
479 flatArrayHandle vah(current, (flatArrayOop)array);
480 oop value_holder = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK);
481 current->set_vm_result(value_holder);
482 JRT_END
483
484 JRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* current, void* val, arrayOopDesc* array, int index))
485 assert(val != nullptr, "can't store null into flat array");
486 ((flatArrayOop)array)->value_copy_to_index(cast_to_oop(val), index);
487 JRT_END
488
489 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
490 // We may want to pass in more arguments - could make this slightly faster
491 LastFrameAccessor last_frame(current);
492 ConstantPool* constants = last_frame.method()->constants();
493 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
494 Klass* klass = constants->klass_at(i, CHECK);
495 bool is_qtype = klass->name()->is_Q_array_signature();
496 int nof_dims = last_frame.number_of_dimensions();
497 assert(klass->is_klass(), "not a class");
498 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
499
500 if (is_qtype) { // Logically creates elements, ensure klass init
501 klass->initialize(CHECK);
502 }
503
504 // We must create an array of jints to pass to multi_allocate.
505 ResourceMark rm(current);
506 const int small_dims = 10;
507 jint dim_array[small_dims];
508 jint *dims = &dim_array[0];
509 if (nof_dims > small_dims) {
510 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
511 }
512 for (int index = 0; index < nof_dims; index++) {
513 // offset from first_size_address is addressed as local[index]
514 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
515 dims[index] = first_size_address[n];
516 }
517 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
518 current->set_vm_result(obj);
519 JRT_END
520
521
522 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
523 assert(oopDesc::is_oop(obj), "must be a valid oop");
524 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
525 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
526 JRT_END
527
528 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
529 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
530
531 Handle ha(THREAD, aobj);
532 Handle hb(THREAD, bobj);
533 JavaValue result(T_BOOLEAN);
534 JavaCallArguments args;
535 args.push_oop(ha);
536 args.push_oop(hb);
537 methodHandle method(current, Universe::is_substitutable_method());
538 JavaCalls::call(&result, method, &args, THREAD);
539 if (HAS_PENDING_EXCEPTION) {
540 // Something really bad happened because isSubstitutable() should not throw exceptions
541 // If it is an error, just let it propagate
542 // If it is an exception, wrap it into an InternalError
543 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
544 Handle e(THREAD, PENDING_EXCEPTION);
545 CLEAR_PENDING_EXCEPTION;
546 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
547 }
548 }
549 return result.get_jboolean();
550 JRT_END
551
552 // Quicken instance-of and check-cast bytecodes
553 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
554 // Force resolving; quicken the bytecode
555 LastFrameAccessor last_frame(current);
556 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
557 ConstantPool* cpool = last_frame.method()->constants();
558 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
559 // program we might have seen an unquick'd bytecode in the interpreter but have another
560 // thread quicken the bytecode before we get here.
561 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
562 Klass* klass = cpool->klass_at(which, CHECK);
563 current->set_vm_result_2(klass);
564 JRT_END
565
566
567 //------------------------------------------------------------------------------------------------------------------------
568 // Exceptions
569
570 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
571 const methodHandle& trap_method, int trap_bci) {
572 if (trap_method.not_null()) {
573 MethodData* trap_mdo = trap_method->method_data();
574 if (trap_mdo == nullptr) {
575 ExceptionMark em(current);
576 JavaThread* THREAD = current; // For exception macros.
577 Method::build_profiling_method_data(trap_method, THREAD);
578 if (HAS_PENDING_EXCEPTION) {
579 // Only metaspace OOM is expected. No Java code executed.
580 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
581 "we expect only an OOM error here");
582 CLEAR_PENDING_EXCEPTION;
583 }
584 trap_mdo = trap_method->method_data();
585 // and fall through...
586 }
587 if (trap_mdo != nullptr) {
588 // Update per-method count of trap events. The interpreter
589 // is updating the MDO to simulate the effect of compiler traps.
590 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
591 }
592 }
593 }
594
595 // Assume the compiler is (or will be) interested in this event.
596 // If necessary, create an MDO to hold the information, and record it.
597 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
598 assert(ProfileTraps, "call me only if profiling");
599 LastFrameAccessor last_frame(current);
600 methodHandle trap_method(current, last_frame.method());
601 int trap_bci = trap_method->bci_from(last_frame.bcp());
602 note_trap_inner(current, reason, trap_method, trap_bci);
603 }
604
605 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
606 // get klass
607 InstanceKlass* klass = InstanceKlass::cast(k);
608 assert(klass->is_initialized(),
609 "this klass should have been initialized during VM initialization");
610 // create instance - do not call constructor since we may have no
611 // (java) stack space left (should assert constructor is empty)
612 Handle exception;
613 oop exception_oop = klass->allocate_instance(CHECK_(exception));
614 exception = Handle(THREAD, exception_oop);
615 if (StackTraceInThrowable) {
616 java_lang_Throwable::fill_in_stack_trace(exception);
617 }
618 return exception;
619 }
620
621 // Special handling for stack overflow: since we don't have any (java) stack
622 // space left we use the pre-allocated & pre-initialized StackOverflowError
623 // klass to create an stack overflow error instance. We do not call its
624 // constructor for the same reason (it is empty, anyway).
625 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
626 Handle exception = get_preinitialized_exception(
627 vmClasses::StackOverflowError_klass(),
628 CHECK);
629 // Increment counter for hs_err file reporting
630 Atomic::inc(&Exceptions::_stack_overflow_errors);
631 // Remove the ScopedValue bindings in case we got a StackOverflowError
632 // while we were trying to manipulate ScopedValue bindings.
633 current->clear_scopedValueBindings();
634 THROW_HANDLE(exception);
635 JRT_END
636
637 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
638 Handle exception = get_preinitialized_exception(
639 vmClasses::StackOverflowError_klass(),
640 CHECK);
641 java_lang_Throwable::set_message(exception(),
642 Universe::delayed_stack_overflow_error_message());
643 // Increment counter for hs_err file reporting
644 Atomic::inc(&Exceptions::_stack_overflow_errors);
645 // Remove the ScopedValue bindings in case we got a StackOverflowError
646 // while we were trying to manipulate ScopedValue bindings.
647 current->clear_scopedValueBindings();
648 THROW_HANDLE(exception);
649 JRT_END
650
651 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
652 // lookup exception klass
653 TempNewSymbol s = SymbolTable::new_symbol(name);
654 if (ProfileTraps) {
655 if (s == vmSymbols::java_lang_ArithmeticException()) {
656 note_trap(current, Deoptimization::Reason_div0_check);
657 } else if (s == vmSymbols::java_lang_NullPointerException()) {
658 note_trap(current, Deoptimization::Reason_null_check);
659 }
660 }
661 // create exception
662 Handle exception = Exceptions::new_exception(current, s, message);
663 current->set_vm_result(exception());
664 JRT_END
665
666
667 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
668 // Produce the error message first because note_trap can safepoint
669 ResourceMark rm(current);
670 const char* klass_name = obj->klass()->external_name();
671 // lookup exception klass
672 TempNewSymbol s = SymbolTable::new_symbol(name);
673 if (ProfileTraps) {
674 if (s == vmSymbols::java_lang_ArrayStoreException()) {
675 note_trap(current, Deoptimization::Reason_array_check);
676 } else {
677 note_trap(current, Deoptimization::Reason_class_check);
678 }
679 }
680 // create exception, with klass name as detail message
681 Handle exception = Exceptions::new_exception(current, s, klass_name);
682 current->set_vm_result(exception());
683 JRT_END
684
685 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
686 // Produce the error message first because note_trap can safepoint
687 ResourceMark rm(current);
688 stringStream ss;
689 ss.print("Index %d out of bounds for length %d", index, a->length());
690
691 if (ProfileTraps) {
692 note_trap(current, Deoptimization::Reason_range_check);
693 }
694
695 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
696 JRT_END
697
698 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
699 JavaThread* current, oopDesc* obj))
700
701 // Produce the error message first because note_trap can safepoint
702 ResourceMark rm(current);
703 char* message = SharedRuntime::generate_class_cast_message(
704 current, obj->klass());
705
706 if (ProfileTraps) {
707 note_trap(current, Deoptimization::Reason_class_check);
708 }
709
710 // create exception
711 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
712 JRT_END
713
714 // exception_handler_for_exception(...) returns the continuation address,
715 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
716 // The exception oop is returned to make sure it is preserved over GC (it
717 // is only on the stack if the exception was thrown explicitly via athrow).
718 // During this operation, the expression stack contains the values for the
719 // bci where the exception happened. If the exception was propagated back
720 // from a call, the expression stack contains the values for the bci at the
721 // invoke w/o arguments (i.e., as if one were inside the call).
722 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
723 // We get here after we have unwound from a callee throwing an exception
724 // into the interpreter. Any deferred stack processing is notified of
725 // the event via the StackWatermarkSet.
726 StackWatermarkSet::after_unwind(current);
727
728 LastFrameAccessor last_frame(current);
729 Handle h_exception(current, exception);
730 methodHandle h_method (current, last_frame.method());
731 constantPoolHandle h_constants(current, h_method->constants());
732 bool should_repeat;
733 int handler_bci;
734 int current_bci = last_frame.bci();
735
736 if (current->frames_to_pop_failed_realloc() > 0) {
737 // Allocation of scalar replaced object used in this frame
738 // failed. Unconditionally pop the frame.
739 current->dec_frames_to_pop_failed_realloc();
740 current->set_vm_result(h_exception());
741 // If the method is synchronized we already unlocked the monitor
742 // during deoptimization so the interpreter needs to skip it when
743 // the frame is popped.
744 current->set_do_not_unlock_if_synchronized(true);
745 return Interpreter::remove_activation_entry();
746 }
747
748 // Need to do this check first since when _do_not_unlock_if_synchronized
749 // is set, we don't want to trigger any classloading which may make calls
750 // into java, or surprisingly find a matching exception handler for bci 0
751 // since at this moment the method hasn't been "officially" entered yet.
752 if (current->do_not_unlock_if_synchronized()) {
753 ResourceMark rm;
754 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
755 current->set_vm_result(exception);
756 return Interpreter::remove_activation_entry();
757 }
758
759 do {
760 should_repeat = false;
761
762 // assertions
763 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
764 // Check that exception is a subclass of Throwable.
765 assert(h_exception->is_a(vmClasses::Throwable_klass()),
766 "Exception not subclass of Throwable");
767
768 // tracing
769 if (log_is_enabled(Info, exceptions)) {
770 ResourceMark rm(current);
771 stringStream tempst;
772 tempst.print("interpreter method <%s>\n"
773 " at bci %d for thread " INTPTR_FORMAT " (%s)",
774 h_method->print_value_string(), current_bci, p2i(current), current->name());
775 Exceptions::log_exception(h_exception, tempst.as_string());
776 }
777 // Don't go paging in something which won't be used.
778 // else if (extable->length() == 0) {
779 // // disabled for now - interpreter is not using shortcut yet
780 // // (shortcut is not to call runtime if we have no exception handlers)
781 // // warning("performance bug: should not call runtime if method has no exception handlers");
782 // }
783 // for AbortVMOnException flag
784 Exceptions::debug_check_abort(h_exception);
785
786 // exception handler lookup
787 Klass* klass = h_exception->klass();
788 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
789 if (HAS_PENDING_EXCEPTION) {
790 // We threw an exception while trying to find the exception handler.
791 // Transfer the new exception to the exception handle which will
792 // be set into thread local storage, and do another lookup for an
793 // exception handler for this exception, this time starting at the
794 // BCI of the exception handler which caused the exception to be
795 // thrown (bug 4307310).
796 h_exception = Handle(THREAD, PENDING_EXCEPTION);
797 CLEAR_PENDING_EXCEPTION;
798 if (handler_bci >= 0) {
799 current_bci = handler_bci;
800 should_repeat = true;
801 }
802 }
803 } while (should_repeat == true);
804
805 #if INCLUDE_JVMCI
806 if (EnableJVMCI && h_method->method_data() != nullptr) {
807 ResourceMark rm(current);
808 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, nullptr);
809 if (pdata != nullptr && pdata->is_BitData()) {
810 BitData* bit_data = (BitData*) pdata;
811 bit_data->set_exception_seen();
812 }
813 }
814 #endif
815
816 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
817 // time throw or a stack unwinding throw and accordingly notify the debugger
818 if (JvmtiExport::can_post_on_exceptions()) {
819 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
820 }
821
822 address continuation = nullptr;
823 address handler_pc = nullptr;
824 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
825 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
826 // handler in this method, or (b) after a stack overflow there is not yet
827 // enough stack space available to reprotect the stack.
828 continuation = Interpreter::remove_activation_entry();
829 #if COMPILER2_OR_JVMCI
830 // Count this for compilation purposes
831 h_method->interpreter_throwout_increment(THREAD);
832 #endif
833 } else {
834 // handler in this method => change bci/bcp to handler bci/bcp and continue there
835 handler_pc = h_method->code_base() + handler_bci;
836 #ifndef ZERO
837 set_bcp_and_mdp(handler_pc, current);
838 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
839 #else
840 continuation = (address)(intptr_t) handler_bci;
841 #endif
842 }
843
844 // notify debugger of an exception catch
845 // (this is good for exceptions caught in native methods as well)
846 if (JvmtiExport::can_post_on_exceptions()) {
847 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
848 }
849
850 current->set_vm_result(h_exception());
851 return continuation;
852 JRT_END
853
854
855 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
856 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
857 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
858 JRT_END
859
860
861 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
862 THROW(vmSymbols::java_lang_AbstractMethodError());
863 JRT_END
864
865 // This method is called from the "abstract_entry" of the interpreter.
866 // At that point, the arguments have already been removed from the stack
867 // and therefore we don't have the receiver object at our fingertips. (Though,
868 // on some platforms the receiver still resides in a register...). Thus,
869 // we have no choice but print an error message not containing the receiver
870 // type.
871 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
872 Method* missingMethod))
873 ResourceMark rm(current);
874 assert(missingMethod != nullptr, "sanity");
875 methodHandle m(current, missingMethod);
876 LinkResolver::throw_abstract_method_error(m, THREAD);
877 JRT_END
878
879 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
880 Klass* recvKlass,
881 Method* missingMethod))
882 ResourceMark rm(current);
883 methodHandle mh = methodHandle(current, missingMethod);
884 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
885 JRT_END
886
887 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current))
888 THROW(vmSymbols::java_lang_InstantiationError());
889 JRT_END
890
891
892 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
893 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
894 JRT_END
895
896 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
897 Klass* recvKlass,
898 Klass* interfaceKlass))
899 ResourceMark rm(current);
900 char buf[1000];
901 buf[0] = '\0';
902 jio_snprintf(buf, sizeof(buf),
903 "Class %s does not implement the requested interface %s",
904 recvKlass ? recvKlass->external_name() : "nullptr",
905 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
906 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
907 JRT_END
908
909 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
910 THROW(vmSymbols::java_lang_NullPointerException());
911 JRT_END
912
913 //------------------------------------------------------------------------------------------------------------------------
914 // Fields
915 //
916
917 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
918 // resolve field
919 fieldDescriptor info;
920 LastFrameAccessor last_frame(current);
921 constantPoolHandle pool(current, last_frame.method()->constants());
922 methodHandle m(current, last_frame.method());
923 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
924 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
925 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
926 bool is_inline_type = bytecode == Bytecodes::_withfield;
927
928 int field_index = last_frame.get_index_u2(bytecode);
929 {
930 JvmtiHideSingleStepping jhss(current);
931 JavaThread* THREAD = current; // For exception macros.
932 LinkResolver::resolve_field_access(info, pool, field_index,
933 m, bytecode, CHECK);
934 } // end JvmtiHideSingleStepping
935
936 // check if link resolution caused cpCache to be updated
937 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
938
939
940 // compute auxiliary field attributes
941 TosState state = as_TosState(info.field_type());
942
943 // Resolution of put instructions on final fields is delayed. That is required so that
944 // exceptions are thrown at the correct place (when the instruction is actually invoked).
945 // If we do not resolve an instruction in the current pass, leaving the put_code
946 // set to zero will cause the next put instruction to the same field to reresolve.
947
948 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
949 // to final instance fields with updates originating from a method different than <init>)
950 // is inhibited. A putfield instruction targeting an instance final field must throw
951 // an IllegalAccessError if the instruction is not in an instance
952 // initializer method <init>. If resolution were not inhibited, a putfield
953 // in an initializer method could be resolved in the initializer. Subsequent
954 // putfield instructions to the same field would then use cached information.
955 // As a result, those instructions would not pass through the VM. That is,
956 // checks in resolve_field_access() would not be executed for those instructions
957 // and the required IllegalAccessError would not be thrown.
958 //
959 // Also, we need to delay resolving getstatic and putstatic instructions until the
960 // class is initialized. This is required so that access to the static
961 // field will call the initialization function every time until the class
962 // is completely initialized ala. in 2.17.5 in JVM Specification.
963 InstanceKlass* klass = info.field_holder();
964 bool uninitialized_static = is_static && !klass->is_initialized();
965 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
966 info.has_initialized_final_update();
967 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
968
969 Bytecodes::Code get_code = (Bytecodes::Code)0;
970 Bytecodes::Code put_code = (Bytecodes::Code)0;
971 if (!uninitialized_static) {
972 if (is_static) {
973 get_code = Bytecodes::_getstatic;
974 } else {
975 get_code = Bytecodes::_getfield;
976 }
977 if (is_put && is_inline_type) {
978 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
979 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
980 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
981 }
982 }
983
984 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
985 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile(),
986 info.is_flat(), info.is_null_free_inline_type());
987 entry->fill_in(info.field_holder(), info.offset(),
988 checked_cast<u2>(info.index()), checked_cast<u1>(state),
989 static_cast<u1>(get_code), static_cast<u1>(put_code));
990 }
991
992
993 //------------------------------------------------------------------------------------------------------------------------
994 // Synchronization
995 //
996 // The interpreter's synchronization code is factored out so that it can
997 // be shared by method invocation and synchronized blocks.
998 //%note synchronization_3
999
1000 //%note monitor_1
1001 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
1002 assert(LockingMode != LM_LIGHTWEIGHT, "Should call monitorenter_obj() when using the new lightweight locking");
1003 #ifdef ASSERT
1004 current->last_frame().interpreter_frame_verify_monitor(elem);
1005 #endif
1006 Handle h_obj(current, elem->obj());
1007 assert(Universe::heap()->is_in_or_null(h_obj()),
1008 "must be null or an object");
1009 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
1010 assert(Universe::heap()->is_in_or_null(elem->obj()),
1011 "must be null or an object");
1012 #ifdef ASSERT
1013 current->last_frame().interpreter_frame_verify_monitor(elem);
1014 #endif
1015 JRT_END
1016
1017 // NOTE: We provide a separate implementation for the new lightweight locking to workaround a limitation
1018 // of registers in x86_32. This entry point accepts an oop instead of a BasicObjectLock*.
1019 // The problem is that we would need to preserve the register that holds the BasicObjectLock,
1020 // but we are using that register to hold the thread. We don't have enough registers to
1021 // also keep the BasicObjectLock, but we don't really need it anyway, we only need
1022 // the object. See also InterpreterMacroAssembler::lock_object().
1023 // As soon as legacy stack-locking goes away we could remove the other monitorenter() entry
1024 // point, and only use oop-accepting entries (same for monitorexit() below).
1025 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter_obj(JavaThread* current, oopDesc* obj))
1026 assert(LockingMode == LM_LIGHTWEIGHT, "Should call monitorenter() when not using the new lightweight locking");
1027 Handle h_obj(current, cast_to_oop(obj));
1028 assert(Universe::heap()->is_in_or_null(h_obj()),
1029 "must be null or an object");
1030 ObjectSynchronizer::enter(h_obj, nullptr, current);
1031 return;
1032 JRT_END
1033
1034 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
1035 oop obj = elem->obj();
1036 assert(Universe::heap()->is_in(obj), "must be an object");
1037 // The object could become unlocked through a JNI call, which we have no other checks for.
1038 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
1039 if (obj->is_unlocked()) {
1040 if (CheckJNICalls) {
1041 fatal("Object has been unlocked by JNI");
1042 }
1043 return;
1044 }
1045 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
1046 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
1047 // again at method exit or in the case of an exception.
1048 elem->set_obj(nullptr);
1049 JRT_END
1050
1051
1052 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
1053 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1054 JRT_END
1055
1056
1057 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
1058 // Returns an illegal exception to install into the current thread. The
1059 // pending_exception flag is cleared so normal exception handling does not
1060 // trigger. Any current installed exception will be overwritten. This
1061 // method will be called during an exception unwind.
1062
1063 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1064 Handle exception(current, current->vm_result());
1065 assert(exception() != nullptr, "vm result should be set");
1066 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
1067 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
1068 current->set_vm_result(exception());
1069 JRT_END
1070
1071
1072 //------------------------------------------------------------------------------------------------------------------------
1073 // Invokes
1074
1075 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
1076 return method->orig_bytecode_at(method->bci_from(bcp));
1077 JRT_END
1078
1079 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
1080 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1081 JRT_END
1082
1083 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
1084 JvmtiExport::post_raw_breakpoint(current, method, bcp);
1085 JRT_END
1086
1087 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
1088 LastFrameAccessor last_frame(current);
1089 // extract receiver from the outgoing argument list if necessary
1090 Handle receiver(current, nullptr);
1091 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1092 bytecode == Bytecodes::_invokespecial) {
1093 ResourceMark rm(current);
1094 methodHandle m (current, last_frame.method());
1095 Bytecode_invoke call(m, last_frame.bci());
1096 Symbol* signature = call.signature();
1097 receiver = Handle(current, last_frame.callee_receiver(signature));
1098
1099 assert(Universe::heap()->is_in_or_null(receiver()),
1100 "sanity check");
1101 assert(receiver.is_null() ||
1102 !Universe::heap()->is_in(receiver->klass()),
1103 "sanity check");
1104 }
1105
1106 // resolve method
1107 CallInfo info;
1108 constantPoolHandle pool(current, last_frame.method()->constants());
1109
1110 methodHandle resolved_method;
1111
1112 {
1113 JvmtiHideSingleStepping jhss(current);
1114 JavaThread* THREAD = current; // For exception macros.
1115 LinkResolver::resolve_invoke(info, receiver, pool,
1116 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1117 THREAD);
1118
1119 if (HAS_PENDING_EXCEPTION) {
1120 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
1121 // Preserve the original exception across the call to note_trap()
1122 PreserveExceptionMark pm(current);
1123 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
1124 note_trap(current, Deoptimization::Reason_null_check);
1125 }
1126 return;
1127 }
1128
1129 if (JvmtiExport::can_hotswap_or_post_breakpoint() && info.resolved_method()->is_old()) {
1130 resolved_method = methodHandle(current, info.resolved_method()->get_new_method());
1131 } else {
1132 resolved_method = methodHandle(current, info.resolved_method());
1133 }
1134 } // end JvmtiHideSingleStepping
1135
1136 // check if link resolution caused cpCache to be updated
1137 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1138 if (cp_cache_entry->is_resolved(bytecode)) return;
1139
1140 #ifdef ASSERT
1141 if (bytecode == Bytecodes::_invokeinterface) {
1142 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
1143 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1144 // (see also CallInfo::set_interface for details)
1145 assert(info.call_kind() == CallInfo::vtable_call ||
1146 info.call_kind() == CallInfo::direct_call, "");
1147 assert(resolved_method->is_final() || info.has_vtable_index(),
1148 "should have been set already");
1149 } else if (!resolved_method->has_itable_index()) {
1150 // Resolved something like CharSequence.toString. Use vtable not itable.
1151 assert(info.call_kind() != CallInfo::itable_call, "");
1152 } else {
1153 // Setup itable entry
1154 assert(info.call_kind() == CallInfo::itable_call, "");
1155 int index = resolved_method->itable_index();
1156 assert(info.itable_index() == index, "");
1157 }
1158 } else if (bytecode == Bytecodes::_invokespecial) {
1159 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1160 } else {
1161 assert(info.call_kind() == CallInfo::direct_call ||
1162 info.call_kind() == CallInfo::vtable_call, "");
1163 }
1164 #endif
1165 // Get sender and only set cpCache entry to resolved if it is not an
1166 // interface. The receiver for invokespecial calls within interface
1167 // methods must be checked for every call.
1168 InstanceKlass* sender = pool->pool_holder();
1169
1170 switch (info.call_kind()) {
1171 case CallInfo::direct_call:
1172 cp_cache_entry->set_direct_call(
1173 bytecode,
1174 resolved_method,
1175 sender->is_interface());
1176 break;
1177 case CallInfo::vtable_call:
1178 cp_cache_entry->set_vtable_call(
1179 bytecode,
1180 resolved_method,
1181 info.vtable_index());
1182 break;
1183 case CallInfo::itable_call:
1184 cp_cache_entry->set_itable_call(
1185 bytecode,
1186 info.resolved_klass(),
1187 resolved_method,
1188 info.itable_index());
1189 break;
1190 default: ShouldNotReachHere();
1191 }
1192 }
1193
1194
1195 // First time execution: Resolve symbols, create a permanent MethodType object.
1196 void InterpreterRuntime::resolve_invokehandle(JavaThread* current) {
1197 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1198 LastFrameAccessor last_frame(current);
1199
1200 // resolve method
1201 CallInfo info;
1202 constantPoolHandle pool(current, last_frame.method()->constants());
1203 {
1204 JvmtiHideSingleStepping jhss(current);
1205 JavaThread* THREAD = current; // For exception macros.
1206 LinkResolver::resolve_invoke(info, Handle(), pool,
1207 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1208 CHECK);
1209 } // end JvmtiHideSingleStepping
1210
1211 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1212 cp_cache_entry->set_method_handle(pool, info);
1213 }
1214
1215 // First time execution: Resolve symbols, create a permanent CallSite object.
1216 void InterpreterRuntime::resolve_invokedynamic(JavaThread* current) {
1217 LastFrameAccessor last_frame(current);
1218 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1219
1220 // resolve method
1221 CallInfo info;
1222 constantPoolHandle pool(current, last_frame.method()->constants());
1223 int index = last_frame.get_index_u4(bytecode);
1224 {
1225 JvmtiHideSingleStepping jhss(current);
1226 JavaThread* THREAD = current; // For exception macros.
1227 LinkResolver::resolve_invoke(info, Handle(), pool,
1228 index, bytecode, CHECK);
1229 } // end JvmtiHideSingleStepping
1230
1231 pool->cache()->set_dynamic_call(info, pool->decode_invokedynamic_index(index));
1232 }
1233
1234 // This function is the interface to the assembly code. It returns the resolved
1235 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1236 // This function will check for redefinition!
1237 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1238 switch (bytecode) {
1239 case Bytecodes::_getstatic:
1240 case Bytecodes::_putstatic:
1241 case Bytecodes::_getfield:
1242 case Bytecodes::_putfield:
1243 case Bytecodes::_withfield:
1244 resolve_get_put(current, bytecode);
1245 break;
1246 case Bytecodes::_invokevirtual:
1247 case Bytecodes::_invokespecial:
1248 case Bytecodes::_invokestatic:
1249 case Bytecodes::_invokeinterface:
1250 resolve_invoke(current, bytecode);
1251 break;
1252 case Bytecodes::_invokehandle:
1253 resolve_invokehandle(current);
1254 break;
1255 case Bytecodes::_invokedynamic:
1256 resolve_invokedynamic(current);
1257 break;
1258 default:
1259 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1260 break;
1261 }
1262 }
1263 JRT_END
1264
1265 //------------------------------------------------------------------------------------------------------------------------
1266 // Miscellaneous
1267
1268
1269 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1270 // Enable WXWrite: the function is called directly by interpreter.
1271 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1272
1273 // frequency_counter_overflow_inner can throw async exception.
1274 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1275 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1276 if (branch_bcp != nullptr && nm != nullptr) {
1277 // This was a successful request for an OSR nmethod. Because
1278 // frequency_counter_overflow_inner ends with a safepoint check,
1279 // nm could have been unloaded so look it up again. It's unsafe
1280 // to examine nm directly since it might have been freed and used
1281 // for something else.
1282 LastFrameAccessor last_frame(current);
1283 Method* method = last_frame.method();
1284 int bci = method->bci_from(last_frame.bcp());
1285 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1286 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1287 if (nm != nullptr && bs_nm != nullptr) {
1288 // in case the transition passed a safepoint we need to barrier this again
1289 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1290 nm = nullptr;
1291 }
1292 }
1293 }
1294 if (nm != nullptr && current->is_interp_only_mode()) {
1295 // Normally we never get an nm if is_interp_only_mode() is true, because
1296 // policy()->event has a check for this and won't compile the method when
1297 // true. However, it's possible for is_interp_only_mode() to become true
1298 // during the compilation. We don't want to return the nm in that case
1299 // because we want to continue to execute interpreted.
1300 nm = nullptr;
1301 }
1302 #ifndef PRODUCT
1303 if (TraceOnStackReplacement) {
1304 if (nm != nullptr) {
1305 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1306 nm->print();
1307 }
1308 }
1309 #endif
1310 return nm;
1311 }
1312
1313 JRT_ENTRY(nmethod*,
1314 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1315 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1316 // flag, in case this method triggers classloading which will call into Java.
1317 UnlockFlagSaver fs(current);
1318
1319 LastFrameAccessor last_frame(current);
1320 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1321 methodHandle method(current, last_frame.method());
1322 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1323 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1324
1325 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1326
1327 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1328 if (osr_nm != nullptr && bs_nm != nullptr) {
1329 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1330 osr_nm = nullptr;
1331 }
1332 }
1333 return osr_nm;
1334 JRT_END
1335
1336 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1337 assert(ProfileInterpreter, "must be profiling interpreter");
1338 int bci = method->bci_from(cur_bcp);
1339 MethodData* mdo = method->method_data();
1340 if (mdo == nullptr) return 0;
1341 return mdo->bci_to_di(bci);
1342 JRT_END
1343
1344 #ifdef ASSERT
1345 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1346 assert(ProfileInterpreter, "must be profiling interpreter");
1347
1348 MethodData* mdo = method->method_data();
1349 assert(mdo != nullptr, "must not be null");
1350
1351 int bci = method->bci_from(bcp);
1352
1353 address mdp2 = mdo->bci_to_dp(bci);
1354 if (mdp != mdp2) {
1355 ResourceMark rm;
1356 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1357 int current_di = mdo->dp_to_di(mdp);
1358 int expected_di = mdo->dp_to_di(mdp2);
1359 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1360 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1361 int approx_bci = -1;
1362 if (current_di >= 0) {
1363 approx_bci = mdo->data_at(current_di)->bci();
1364 }
1365 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1366 mdo->print_on(tty);
1367 method->print_codes();
1368 }
1369 assert(mdp == mdp2, "wrong mdp");
1370 JRT_END
1371 #endif // ASSERT
1372
1373 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1374 assert(ProfileInterpreter, "must be profiling interpreter");
1375 ResourceMark rm(current);
1376 LastFrameAccessor last_frame(current);
1377 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1378 MethodData* h_mdo = last_frame.method()->method_data();
1379
1380 // Grab a lock to ensure atomic access to setting the return bci and
1381 // the displacement. This can block and GC, invalidating all naked oops.
1382 MutexLocker ml(RetData_lock);
1383
1384 // ProfileData is essentially a wrapper around a derived oop, so we
1385 // need to take the lock before making any ProfileData structures.
1386 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1387 guarantee(data != nullptr, "profile data must be valid");
1388 RetData* rdata = data->as_RetData();
1389 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1390 last_frame.set_mdp(new_mdp);
1391 JRT_END
1392
1393 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1394 return Method::build_method_counters(current, m);
1395 JRT_END
1396
1397
1398 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1399 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1400 // stack traversal automatically takes care of preserving arguments for invoke, so
1401 // this is no longer needed.
1402
1403 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1404 // if this is called during a safepoint
1405
1406 if (JvmtiExport::should_post_single_step()) {
1407 // This function is called by the interpreter when single stepping. Such single
1408 // stepping could unwind a frame. Then, it is important that we process any frames
1409 // that we might return into.
1410 StackWatermarkSet::before_unwind(current);
1411
1412 // We are called during regular safepoints and when the VM is
1413 // single stepping. If any thread is marked for single stepping,
1414 // then we may have JVMTI work to do.
1415 LastFrameAccessor last_frame(current);
1416 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1417 }
1418 JRT_END
1419
1420 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1421 assert(current == JavaThread::current(), "pre-condition");
1422 // This function is called by the interpreter when the return poll found a reason
1423 // to call the VM. The reason could be that we are returning into a not yet safe
1424 // to access frame. We handle that below.
1425 // Note that this path does not check for single stepping, because we do not want
1426 // to single step when unwinding frames for an exception being thrown. Instead,
1427 // such single stepping code will use the safepoint table, which will use the
1428 // InterpreterRuntime::at_safepoint callback.
1429 StackWatermarkSet::before_unwind(current);
1430 JRT_END
1431
1432 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1433 ResolvedFieldEntry *entry))
1434
1435 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1436 // check the access_flags for the field in the klass
1437
1438 InstanceKlass* ik = entry->field_holder();
1439 int index = entry->field_index();
1440 if (!ik->field_status(index).is_access_watched()) return;
1441
1442 bool is_static = (obj == nullptr);
1443 bool is_flat = entry->is_flat();
1444 HandleMark hm(current);
1445
1446 Handle h_obj;
1447 if (!is_static) {
1448 // non-static field accessors have an object, but we need a handle
1449 h_obj = Handle(current, obj);
1450 }
1451 InstanceKlass* field_holder = entry->field_holder(); // HERE
1452 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static, is_flat);
1453 LastFrameAccessor last_frame(current);
1454 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1455 JRT_END
1456
1457 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1458 ResolvedFieldEntry *entry, jvalue *value))
1459
1460 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1461 InstanceKlass* ik = entry->field_holder();
1462
1463 // check the access_flags for the field in the klass
1464 int index = entry->field_index();
1465 // bail out if field modifications are not watched
1466 if (!ik->field_status(index).is_modification_watched()) return;
1467
1468 char sig_type = '\0';
1469
1470 switch((TosState)entry->tos_state()) {
1471 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1472 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1473 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1474 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1475 case itos: sig_type = JVM_SIGNATURE_INT; break;
1476 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1477 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1478 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1479 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1480 default: ShouldNotReachHere(); return;
1481 }
1482
1483 // Both Q-signatures and L-signatures are mapped to atos
1484 ik->field_is_null_free_inline_type(index);
1485 if (entry->tos_state() == atos && ik->field_is_null_free_inline_type(index)) {
1486 sig_type = JVM_SIGNATURE_PRIMITIVE_OBJECT;
1487 }
1488
1489 bool is_static = (obj == nullptr);
1490 bool is_flat = entry->is_flat();
1491
1492 HandleMark hm(current);
1493 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static, is_flat);
1494 jvalue fvalue;
1495 #ifdef _LP64
1496 fvalue = *value;
1497 #else
1498 // Long/double values are stored unaligned and also noncontiguously with
1499 // tagged stacks. We can't just do a simple assignment even in the non-
1500 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1501 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1502 // We assume that the two halves of longs/doubles are stored in interpreter
1503 // stack slots in platform-endian order.
1504 jlong_accessor u;
1505 jint* newval = (jint*)value;
1506 u.words[0] = newval[0];
1507 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1508 fvalue.j = u.long_value;
1509 #endif // _LP64
1510
1511 Handle h_obj;
1512 if (!is_static) {
1513 // non-static field accessors have an object, but we need a handle
1514 h_obj = Handle(current, obj);
1515 }
1516
1517 LastFrameAccessor last_frame(current);
1518 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1519 fid, sig_type, &fvalue);
1520 JRT_END
1521
1522 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1523 LastFrameAccessor last_frame(current);
1524 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1525 JRT_END
1526
1527
1528 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1529 // before transitioning to VM, and restore it after transitioning back
1530 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1531 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1532 LastFrameAccessor last_frame(current);
1533 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1534 JRT_END
1535
1536 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1537 {
1538 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1539 }
1540 JRT_END
1541
1542
1543 // Implementation of SignatureHandlerLibrary
1544
1545 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1546 // Dummy definition (else normalization method is defined in CPU
1547 // dependent code)
1548 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1549 return fingerprint;
1550 }
1551 #endif
1552
1553 address SignatureHandlerLibrary::set_handler_blob() {
1554 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1555 if (handler_blob == nullptr) {
1556 return nullptr;
1557 }
1558 address handler = handler_blob->code_begin();
1559 _handler_blob = handler_blob;
1560 _handler = handler;
1561 return handler;
1562 }
1563
1564 void SignatureHandlerLibrary::initialize() {
1565 if (_fingerprints != nullptr) {
1566 return;
1567 }
1568 if (set_handler_blob() == nullptr) {
1569 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1570 }
1571
1572 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1573 SignatureHandlerLibrary::buffer_size);
1574 _buffer = bb->code_begin();
1575
1576 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1577 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1578 }
1579
1580 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1581 address handler = _handler;
1582 int insts_size = buffer->pure_insts_size();
1583 if (handler + insts_size > _handler_blob->code_end()) {
1584 // get a new handler blob
1585 handler = set_handler_blob();
1586 }
1587 if (handler != nullptr) {
1588 memcpy(handler, buffer->insts_begin(), insts_size);
1589 pd_set_handler(handler);
1590 ICache::invalidate_range(handler, insts_size);
1591 _handler = handler + insts_size;
1592 }
1593 return handler;
1594 }
1595
1596 void SignatureHandlerLibrary::add(const methodHandle& method) {
1597 if (method->signature_handler() == nullptr) {
1598 // use slow signature handler if we can't do better
1599 int handler_index = -1;
1600 // check if we can use customized (fast) signature handler
1601 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1602 // use customized signature handler
1603 MutexLocker mu(SignatureHandlerLibrary_lock);
1604 // make sure data structure is initialized
1605 initialize();
1606 // lookup method signature's fingerprint
1607 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1608 // allow CPU dependent code to optimize the fingerprints for the fast handler
1609 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1610 handler_index = _fingerprints->find(fingerprint);
1611 // create handler if necessary
1612 if (handler_index < 0) {
1613 ResourceMark rm;
1614 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1615 CodeBuffer buffer((address)(_buffer + align_offset),
1616 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1617 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1618 // copy into code heap
1619 address handler = set_handler(&buffer);
1620 if (handler == nullptr) {
1621 // use slow signature handler (without memorizing it in the fingerprints)
1622 } else {
1623 // debugging support
1624 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1625 ttyLocker ttyl;
1626 tty->cr();
1627 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1628 _handlers->length(),
1629 (method->is_static() ? "static" : "receiver"),
1630 method->name_and_sig_as_C_string(),
1631 fingerprint,
1632 buffer.insts_size());
1633 if (buffer.insts_size() > 0) {
1634 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1635 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1636 }
1637 #ifndef PRODUCT
1638 address rh_begin = Interpreter::result_handler(method()->result_type());
1639 if (CodeCache::contains(rh_begin)) {
1640 // else it might be special platform dependent values
1641 tty->print_cr(" --- associated result handler ---");
1642 address rh_end = rh_begin;
1643 while (*(int*)rh_end != 0) {
1644 rh_end += sizeof(int);
1645 }
1646 Disassembler::decode(rh_begin, rh_end);
1647 } else {
1648 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1649 }
1650 #endif
1651 }
1652 // add handler to library
1653 _fingerprints->append(fingerprint);
1654 _handlers->append(handler);
1655 // set handler index
1656 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1657 handler_index = _fingerprints->length() - 1;
1658 }
1659 }
1660 // Set handler under SignatureHandlerLibrary_lock
1661 if (handler_index < 0) {
1662 // use generic signature handler
1663 method->set_signature_handler(Interpreter::slow_signature_handler());
1664 } else {
1665 // set handler
1666 method->set_signature_handler(_handlers->at(handler_index));
1667 }
1668 } else {
1669 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1670 // use generic signature handler
1671 method->set_signature_handler(Interpreter::slow_signature_handler());
1672 }
1673 }
1674 #ifdef ASSERT
1675 int handler_index = -1;
1676 int fingerprint_index = -2;
1677 {
1678 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1679 // in any way if accessed from multiple threads. To avoid races with another
1680 // thread which may change the arrays in the above, mutex protected block, we
1681 // have to protect this read access here with the same mutex as well!
1682 MutexLocker mu(SignatureHandlerLibrary_lock);
1683 if (_handlers != nullptr) {
1684 handler_index = _handlers->find(method->signature_handler());
1685 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1686 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1687 fingerprint_index = _fingerprints->find(fingerprint);
1688 }
1689 }
1690 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1691 handler_index == fingerprint_index, "sanity check");
1692 #endif // ASSERT
1693 }
1694
1695 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1696 int handler_index = -1;
1697 // use customized signature handler
1698 MutexLocker mu(SignatureHandlerLibrary_lock);
1699 // make sure data structure is initialized
1700 initialize();
1701 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1702 handler_index = _fingerprints->find(fingerprint);
1703 // create handler if necessary
1704 if (handler_index < 0) {
1705 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1706 tty->cr();
1707 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1708 _handlers->length(),
1709 p2i(handler),
1710 fingerprint);
1711 }
1712 _fingerprints->append(fingerprint);
1713 _handlers->append(handler);
1714 } else {
1715 if (PrintSignatureHandlers) {
1716 tty->cr();
1717 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1718 _handlers->length(),
1719 fingerprint,
1720 p2i(_handlers->at(handler_index)),
1721 p2i(handler));
1722 }
1723 }
1724 }
1725
1726
1727 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1728 address SignatureHandlerLibrary::_handler = nullptr;
1729 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1730 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1731 address SignatureHandlerLibrary::_buffer = nullptr;
1732
1733
1734 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1735 methodHandle m(current, method);
1736 assert(m->is_native(), "sanity check");
1737 // lookup native function entry point if it doesn't exist
1738 if (!m->has_native_function()) {
1739 NativeLookup::lookup(m, CHECK);
1740 }
1741 // make sure signature handler is installed
1742 SignatureHandlerLibrary::add(m);
1743 // The interpreter entry point checks the signature handler first,
1744 // before trying to fetch the native entry point and klass mirror.
1745 // We must set the signature handler last, so that multiple processors
1746 // preparing the same method will be sure to see non-null entry & mirror.
1747 JRT_END
1748
1749 #if defined(IA32) || defined(AMD64) || defined(ARM)
1750 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1751 assert(current == JavaThread::current(), "pre-condition");
1752 if (src_address == dest_address) {
1753 return;
1754 }
1755 ResourceMark rm;
1756 LastFrameAccessor last_frame(current);
1757 assert(last_frame.is_interpreted_frame(), "");
1758 jint bci = last_frame.bci();
1759 methodHandle mh(current, last_frame.method());
1760 Bytecode_invoke invoke(mh, bci);
1761 ArgumentSizeComputer asc(invoke.signature());
1762 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1763 Copy::conjoint_jbytes(src_address, dest_address,
1764 size_of_arguments * Interpreter::stackElementSize);
1765 JRT_END
1766 #endif
1767
1768 #if INCLUDE_JVMTI
1769 // This is a support of the JVMTI PopFrame interface.
1770 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1771 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1772 // The member_name argument is a saved reference (in local#0) to the member_name.
1773 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1774 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1775 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1776 Method* method, address bcp))
1777 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1778 if (code != Bytecodes::_invokestatic) {
1779 return;
1780 }
1781 ConstantPool* cpool = method->constants();
1782 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1783 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1784 Symbol* mname = cpool->name_ref_at(cp_index, code);
1785
1786 if (MethodHandles::has_member_arg(cname, mname)) {
1787 oop member_name_oop = cast_to_oop(member_name);
1788 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1789 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1790 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1791 }
1792 current->set_vm_result(member_name_oop);
1793 } else {
1794 current->set_vm_result(nullptr);
1795 }
1796 JRT_END
1797 #endif // INCLUDE_JVMTI
1798
1799 #ifndef PRODUCT
1800 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1801 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1802 // The generated code still uses call_VM because that will set up the frame pointer for
1803 // bcp and method.
1804 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1805 assert(current == JavaThread::current(), "pre-condition");
1806 LastFrameAccessor last_frame(current);
1807 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1808 methodHandle mh(current, last_frame.method());
1809 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1810 return preserve_this_value;
1811 JRT_END
1812 #endif // !PRODUCT