1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/barrierSetNMethod.hpp"
34 #include "gc/shared/collectedHeap.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "interpreter/interpreterRuntime.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "interpreter/templateTable.hpp"
39 #include "logging/log.hpp"
40 #include "memory/oopFactory.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.hpp"
43 #include "oops/constantPool.hpp"
44 #include "oops/cpCache.inline.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/methodData.hpp"
47 #include "oops/objArrayKlass.hpp"
48 #include "oops/objArrayOop.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "oops/symbol.hpp"
51 #include "oops/valueArrayKlass.hpp"
52 #include "oops/valueArrayOop.inline.hpp"
53 #include "oops/valueKlass.inline.hpp"
54 #include "prims/jvmtiExport.hpp"
55 #include "prims/nativeLookup.hpp"
56 #include "runtime/atomic.hpp"
57 #include "runtime/biasedLocking.hpp"
58 #include "runtime/compilationPolicy.hpp"
59 #include "runtime/deoptimization.hpp"
60 #include "runtime/fieldDescriptor.inline.hpp"
61 #include "runtime/frame.inline.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/icache.hpp"
64 #include "runtime/interfaceSupport.inline.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/osThread.hpp"
69 #include "runtime/sharedRuntime.hpp"
70 #include "runtime/stubRoutines.hpp"
71 #include "runtime/synchronizer.hpp"
72 #include "runtime/threadCritical.hpp"
73 #include "utilities/align.hpp"
74 #include "utilities/copy.hpp"
75 #include "utilities/events.hpp"
76 #include "utilities/globalDefinitions.hpp"
77 #ifdef COMPILER2
78 #include "opto/runtime.hpp"
79 #endif
80
81 class UnlockFlagSaver {
82 private:
83 JavaThread* _thread;
84 bool _do_not_unlock;
85 public:
86 UnlockFlagSaver(JavaThread* t) {
87 _thread = t;
88 _do_not_unlock = t->do_not_unlock_if_synchronized();
89 t->set_do_not_unlock_if_synchronized(false);
90 }
91 ~UnlockFlagSaver() {
92 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
93 }
94 };
95
96 // Helper class to access current interpreter state
97 class LastFrameAccessor : public StackObj {
98 frame _last_frame;
99 public:
100 LastFrameAccessor(JavaThread* thread) {
101 assert(thread == Thread::current(), "sanity");
102 _last_frame = thread->last_frame();
103 }
104 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
105 Method* method() const { return _last_frame.interpreter_frame_method(); }
106 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
107 int bci() const { return _last_frame.interpreter_frame_bci(); }
108 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
109
110 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
111 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
112
113 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
114 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
115
116 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
117 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
118 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
119 int get_index_u2_cpcache(Bytecodes::Code bc) const
120 { return bytecode().get_index_u2_cpcache(bc); }
121 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
122 int number_of_dimensions() const { return bcp()[3]; }
123 ConstantPoolCacheEntry* cache_entry_at(int i) const
124 { return method()->constants()->cache()->entry_at(i); }
125 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
126
127 oop callee_receiver(Symbol* signature) {
128 return _last_frame.interpreter_callee_receiver(signature);
129 }
130 BasicObjectLock* monitor_begin() const {
131 return _last_frame.interpreter_frame_monitor_begin();
132 }
133 BasicObjectLock* monitor_end() const {
134 return _last_frame.interpreter_frame_monitor_end();
135 }
136 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
137 return _last_frame.next_monitor_in_interpreter_frame(current);
138 }
139
140 frame& get_frame() { return _last_frame; }
141 };
142
143 //------------------------------------------------------------------------------------------------------------------------
144 // State accessors
145
146 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
147 LastFrameAccessor last_frame(thread);
148 last_frame.set_bcp(bcp);
149 if (ProfileInterpreter) {
150 // ProfileTraps uses MDOs independently of ProfileInterpreter.
151 // That is why we must check both ProfileInterpreter and mdo != NULL.
152 MethodData* mdo = last_frame.method()->method_data();
153 if (mdo != NULL) {
154 NEEDS_CLEANUP;
155 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
156 }
157 }
158 }
159
160 //------------------------------------------------------------------------------------------------------------------------
161 // Constants
162
163
164 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
165 // access constant pool
166 LastFrameAccessor last_frame(thread);
167 ConstantPool* pool = last_frame.method()->constants();
168 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
169 constantTag tag = pool->tag_at(index);
170
171 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
172 Klass* klass = pool->klass_at(index, CHECK);
173 oop java_class = klass->java_mirror();
174 thread->set_vm_result(java_class);
175 JRT_END
176
177 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
178 assert(bytecode == Bytecodes::_ldc ||
179 bytecode == Bytecodes::_ldc_w ||
180 bytecode == Bytecodes::_ldc2_w ||
181 bytecode == Bytecodes::_fast_aldc ||
182 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
183 ResourceMark rm(thread);
184 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
185 bytecode == Bytecodes::_fast_aldc_w);
186 LastFrameAccessor last_frame(thread);
187 methodHandle m (thread, last_frame.method());
188 Bytecode_loadconstant ldc(m, last_frame.bci());
189
190 // Double-check the size. (Condy can have any type.)
191 BasicType type = ldc.result_type();
192 switch (type2size[type]) {
193 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
194 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
195 default: ShouldNotReachHere();
196 }
197
198 // Resolve the constant. This does not do unboxing.
199 // But it does replace Universe::the_null_sentinel by null.
200 oop result = ldc.resolve_constant(CHECK);
201 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
202
203 #ifdef ASSERT
204 {
205 // The bytecode wrappers aren't GC-safe so construct a new one
206 Bytecode_loadconstant ldc2(m, last_frame.bci());
207 int rindex = ldc2.cache_index();
208 if (rindex < 0)
209 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
210 if (rindex >= 0) {
211 oop coop = m->constants()->resolved_references()->obj_at(rindex);
212 oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
213 assert(roop == coop, "expected result for assembly code");
214 }
215 }
216 #endif
217 thread->set_vm_result(result);
218 if (!is_fast_aldc) {
219 // Tell the interpreter how to unbox the primitive.
220 guarantee(java_lang_boxing_object::is_instance(result, type), "");
221 int offset = java_lang_boxing_object::value_offset_in_bytes(type);
222 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
223 | (offset & ConstantPoolCacheEntry::field_index_mask));
224 thread->set_vm_result_2((Metadata*)flags);
225 }
226 }
227 JRT_END
228
229
230 //------------------------------------------------------------------------------------------------------------------------
231 // Allocation
232
233 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
234 Klass* k = pool->klass_at(index, CHECK);
235 InstanceKlass* klass = InstanceKlass::cast(k);
236
237 // Make sure we are not instantiating an abstract klass
238 klass->check_valid_for_instantiation(true, CHECK);
239
240 // Make sure klass is initialized
241 klass->initialize(CHECK);
242
243 // At this point the class may not be fully initialized
244 // because of recursive initialization. If it is fully
245 // initialized & has_finalized is not set, we rewrite
246 // it into its fast version (Note: no locking is needed
247 // here since this is an atomic byte write and can be
248 // done more than once).
249 //
250 // Note: In case of classes with has_finalized we don't
251 // rewrite since that saves us an extra check in
252 // the fast version which then would call the
253 // slow version anyway (and do a call back into
254 // Java).
255 // If we have a breakpoint, then we don't rewrite
256 // because the _breakpoint bytecode would be lost.
257 oop obj = klass->allocate_instance(CHECK);
258 thread->set_vm_result(obj);
259 JRT_END
260
261 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) {
262 switch (type) {
263 case T_BOOLEAN:
264 instance()->bool_field_put(offset, (jboolean)*((int*)addr));
265 break;
266 case T_CHAR:
267 instance()->char_field_put(offset, (jchar) *((int*)addr));
268 break;
269 case T_FLOAT:
270 instance()->float_field_put(offset, (jfloat)*((float*)addr));
271 break;
272 case T_DOUBLE:
273 instance()->double_field_put(offset, (jdouble)*((double*)addr));
274 break;
275 case T_BYTE:
276 instance()->byte_field_put(offset, (jbyte)*((int*)addr));
277 break;
278 case T_SHORT:
279 instance()->short_field_put(offset, (jshort)*((int*)addr));
280 break;
281 case T_INT:
282 instance()->int_field_put(offset, (jint)*((int*)addr));
283 break;
284 case T_LONG:
285 instance()->long_field_put(offset, (jlong)*((long long*)addr));
286 break;
287 case T_OBJECT:
288 case T_ARRAY:
289 case T_VALUETYPE:
290 fatal("Should not be handled with this method");
291 break;
292 default:
293 fatal("Unsupported BasicType");
294 }
295 }
296
297 JRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* thread, ConstantPool* pool, int index))
298 // Getting the ValueKlass
299 Klass* k = pool->klass_at(index, CHECK);
300 assert(k->is_value(), "defaultvalue argument must be the value type class");
301 ValueKlass* vklass = ValueKlass::cast(k);
302
303 vklass->initialize(THREAD);
304 oop res = vklass->default_value();
305 thread->set_vm_result(res);
306 JRT_END
307
308 JRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* thread, ConstantPoolCache* cp_cache))
309 LastFrameAccessor last_frame(thread);
310 // Getting the ValueKlass
311 int index = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_withfield));
312 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
313 assert(cp_entry->is_resolved(Bytecodes::_withfield), "Should have been resolved");
314 Klass* klass = cp_entry->f1_as_klass();
315 assert(klass->is_value(), "withfield only applies to value types");
316 ValueKlass* vklass = ValueKlass::cast(klass);
317
318 // Getting Field information
319 int offset = cp_entry->f2_as_index();
320 int field_index = cp_entry->field_index();
321 int field_offset = cp_entry->f2_as_offset();
322 Symbol* field_signature = vklass->field_signature(field_index);
323 ResourceMark rm(THREAD);
324 const char* signature = (const char *) field_signature->as_utf8();
325 BasicType field_type = char2type(signature[0]);
326
327 // Getting old value
328 frame& f = last_frame.get_frame();
329 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1;
330 int vt_offset = type2size[field_type];
331 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset);
332 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver");
333 Handle old_value_h(THREAD, old_value);
334
335 // Creating new value by copying the one passed in argument
336 instanceOop new_value = vklass->allocate_instance(
337 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
338 Handle new_value_h = Handle(THREAD, new_value);
339 vklass->value_copy_oop_to_new_oop(old_value_h(), new_value_h());
340
341 // Updating the field specified in arguments
342 if (field_type == T_ARRAY || field_type == T_OBJECT) {
343 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
344 assert(aoop == NULL || oopDesc::is_oop(aoop),"argument must be a reference type");
345 new_value_h()->obj_field_put(field_offset, aoop);
346 } else if (field_type == T_VALUETYPE) {
347 if (cp_entry->is_flattened()) {
348 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
349 if (vt_oop == NULL) {
350 THROW_(vmSymbols::java_lang_NullPointerException(),
351 (type2size[field_type] * AbstractInterpreter::stackElementSize));
352 }
353 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type");
354 Klass* field_k = vklass->get_value_field_klass(field_index);
355 ValueKlass* field_vk = ValueKlass::cast(field_k);
356 assert(field_vk == vt_oop->klass(), "Must match");
357 field_vk->value_copy_oop_to_new_payload(vt_oop, ((char*)(oopDesc*)new_value_h()) + field_offset);
358 } else { // not flattened
359 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
360 if (voop == NULL && cp_entry->is_flattenable()) {
361 THROW_(vmSymbols::java_lang_NullPointerException(),
362 (type2size[field_type] * AbstractInterpreter::stackElementSize));
363 }
364 assert(voop == NULL || oopDesc::is_oop(voop),"checking argument");
365 new_value_h()->obj_field_put(field_offset, voop);
366 }
367 } else { // not T_OBJECT nor T_ARRAY nor T_VALUETYPE
368 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx);
369 copy_primitive_argument(addr, new_value_h, field_offset, field_type);
370 }
371
372 // returning result
373 thread->set_vm_result(new_value_h());
374 return (type2size[field_type] + type2size[T_OBJECT]) * AbstractInterpreter::stackElementSize;
375 JRT_END
376
377 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_value_field(JavaThread* thread, oopDesc* mirror, int index))
378 // The interpreter tries to access a flattenable static field that has not been initialized.
379 // This situation can happen in different scenarios:
380 // 1 - if the load or initialization of the field failed during step 8 of
381 // the initialization of the holder of the field, in this case the access to the field
382 // must fail
383 // 2 - it can also happen when the initialization of the holder class triggered the initialization of
384 // another class which accesses this field in its static initializer, in this case the
385 // access must succeed to allow circularity
386 // The code below tries to load and initialize the field's class again before returning the default value.
387 // If the field was not initialized because of an error, a exception should be thrown.
388 // If the class is being initialized, the default value is returned.
389 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
390 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
391 if (klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD)) {
392 int offset = klass->field_offset(index);
393 Klass* field_k = klass->get_value_field_klass_or_null(index);
394 if (field_k == NULL) {
395 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD),
396 Handle(THREAD, klass->class_loader()),
397 Handle(THREAD, klass->protection_domain()),
398 true, CHECK);
399 assert(field_k != NULL, "Should have been loaded or an exception thrown above");
400 klass->set_value_field_klass(index, field_k);
401 }
402 field_k->initialize(CHECK);
403 oop defaultvalue = ValueKlass::cast(field_k)->default_value();
404 // It is safe to initialized the static field because 1) the current thread is the initializing thread
405 // and is the only one that can access it, and 2) the field is actually not initialized (i.e. null)
406 // otherwise the JVM should not be executing this code.
407 mirror->obj_field_put(offset, defaultvalue);
408 thread->set_vm_result(defaultvalue);
409 } else {
410 assert(klass->is_in_error_state(), "If not initializing, initialization must have failed to get there");
411 ResourceMark rm(THREAD);
412 const char* desc = "Could not initialize class ";
413 const char* className = klass->external_name();
414 size_t msglen = strlen(desc) + strlen(className) + 1;
415 char* message = NEW_RESOURCE_ARRAY(char, msglen);
416 if (NULL == message) {
417 // Out of memory: can't create detailed error message
418 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);
419 } else {
420 jio_snprintf(message, msglen, "%s%s", desc, className);
421 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message);
422 }
423 }
424 JRT_END
425
426 JRT_ENTRY(void, InterpreterRuntime::uninitialized_instance_value_field(JavaThread* thread, oopDesc* obj, int index))
427 instanceHandle obj_h(THREAD, (instanceOop)obj);
428 InstanceKlass* klass = InstanceKlass::cast(obj_h()->klass());
429 Klass* field_k = klass->get_value_field_klass_or_null(index);
430 assert(field_k != NULL, "Must have been initialized");
431 ValueKlass* field_vklass = ValueKlass::cast(field_k);
432 assert(field_vklass->is_initialized(), "Must have been initialized at this point");
433 instanceOop res = (instanceOop)field_vklass->default_value();
434 thread->set_vm_result(res);
435 JRT_END
436
437 JRT_ENTRY(void, InterpreterRuntime::write_flattened_value(JavaThread* thread, oopDesc* value, int offset, oopDesc* rcv))
438 assert(oopDesc::is_oop(value), "Sanity check");
439 assert(oopDesc::is_oop(rcv), "Sanity check");
440 assert(value->is_value(), "Sanity check");
441
442 ValueKlass* vklass = ValueKlass::cast(value->klass());
443 if (!vklass->is_empty_value()) {
444 vklass->value_copy_oop_to_payload(value, ((char*)(oopDesc*)rcv) + offset);
445 }
446 JRT_END
447
448 JRT_ENTRY(void, InterpreterRuntime::read_flattened_field(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder))
449 Handle obj_h(THREAD, obj);
450
451 assert(oopDesc::is_oop(obj), "Sanity check");
452
453 assert(field_holder->is_instance_klass(), "Sanity check");
454 InstanceKlass* klass = InstanceKlass::cast(field_holder);
455
456 assert(klass->field_is_flattened(index), "Sanity check");
457
458 ValueKlass* field_vklass = ValueKlass::cast(klass->get_value_field_klass(index));
459 assert(field_vklass->is_initialized(), "Must be initialized at this point");
460
461 instanceOop res = NULL;
462 if (field_vklass->is_empty_value()) {
463 res = (instanceOop)field_vklass->default_value();
464 } else {
465 res = field_vklass->allocate_instance(CHECK);
466 field_vklass->value_copy_payload_to_new_oop(((char*)(oopDesc*)obj_h()) + klass->field_offset(index), res);
467 }
468 assert(res != NULL, "Must be set in one of two paths above");
469 thread->set_vm_result(res);
470 JRT_END
471
472 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
473 oop obj = oopFactory::new_typeArray(type, size, CHECK);
474 thread->set_vm_result(obj);
475 JRT_END
476
477
478 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
479 Klass* klass = pool->klass_at(index, CHECK);
480 bool is_qtype_desc = pool->tag_at(index).is_Qdescriptor_klass();
481 arrayOop obj;
482 if ((!klass->is_array_klass()) && is_qtype_desc) { // Logically creates elements, ensure klass init
483 klass->initialize(CHECK);
484 obj = oopFactory::new_valueArray(klass, size, CHECK);
485 } else {
486 obj = oopFactory::new_objArray(klass, size, CHECK);
487 }
488 thread->set_vm_result(obj);
489 JRT_END
490
491 JRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
492 valueArrayHandle vah(thread, (valueArrayOop)array);
493 oop value_holder = valueArrayOopDesc::value_copy_from_index(vah, index, CHECK);
494 thread->set_vm_result(value_holder);
495 JRT_END
496
497 JRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, void* val, arrayOopDesc* array, int index))
498 assert(val != NULL, "can't store null into flat array");
499 ((valueArrayOop)array)->value_copy_to_index((oop)val, index);
500 JRT_END
501
502 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
503 // We may want to pass in more arguments - could make this slightly faster
504 LastFrameAccessor last_frame(thread);
505 ConstantPool* constants = last_frame.method()->constants();
506 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
507 Klass* klass = constants->klass_at(i, CHECK);
508 bool is_qtype = klass->name()->is_Q_array_signature();
509 int nof_dims = last_frame.number_of_dimensions();
510 assert(klass->is_klass(), "not a class");
511 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
512
513 if (is_qtype) { // Logically creates elements, ensure klass init
514 klass->initialize(CHECK);
515 }
516
517 // We must create an array of jints to pass to multi_allocate.
518 ResourceMark rm(thread);
519 const int small_dims = 10;
520 jint dim_array[small_dims];
521 jint *dims = &dim_array[0];
522 if (nof_dims > small_dims) {
523 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
524 }
525 for (int index = 0; index < nof_dims; index++) {
526 // offset from first_size_address is addressed as local[index]
527 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
528 dims[index] = first_size_address[n];
529 }
530 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
531 thread->set_vm_result(obj);
532 JRT_END
533
534
535 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
536 assert(oopDesc::is_oop(obj), "must be a valid oop");
537 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
538 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
539 JRT_END
540
541 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* thread, oopDesc* aobj, oopDesc* bobj))
542 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
543
544 Handle ha(THREAD, aobj);
545 Handle hb(THREAD, bobj);
546 JavaValue result(T_BOOLEAN);
547 JavaCallArguments args;
548 args.push_oop(ha);
549 args.push_oop(hb);
550 methodHandle method(Universe::is_substitutable_method());
551 JavaCalls::call(&result, method, &args, THREAD);
552 guarantee(!HAS_PENDING_EXCEPTION, "isSubstitutable() raised exception");
553 return result.get_jboolean();
554 JRT_END
555
556 // Quicken instance-of and check-cast bytecodes
557 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
558 // Force resolving; quicken the bytecode
559 LastFrameAccessor last_frame(thread);
560 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
561 ConstantPool* cpool = last_frame.method()->constants();
562 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
563 // program we might have seen an unquick'd bytecode in the interpreter but have another
564 // thread quicken the bytecode before we get here.
565 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
566 Klass* klass = cpool->klass_at(which, CHECK);
567 thread->set_vm_result_2(klass);
568 JRT_END
569
570
571 //------------------------------------------------------------------------------------------------------------------------
572 // Exceptions
573
574 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
575 const methodHandle& trap_method, int trap_bci, TRAPS) {
576 if (trap_method.not_null()) {
577 MethodData* trap_mdo = trap_method->method_data();
578 if (trap_mdo == NULL) {
579 Method::build_interpreter_method_data(trap_method, THREAD);
580 if (HAS_PENDING_EXCEPTION) {
581 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
582 "we expect only an OOM error here");
583 CLEAR_PENDING_EXCEPTION;
584 }
585 trap_mdo = trap_method->method_data();
586 // and fall through...
587 }
588 if (trap_mdo != NULL) {
589 // Update per-method count of trap events. The interpreter
590 // is updating the MDO to simulate the effect of compiler traps.
591 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
592 }
593 }
594 }
595
596 // Assume the compiler is (or will be) interested in this event.
597 // If necessary, create an MDO to hold the information, and record it.
598 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
599 assert(ProfileTraps, "call me only if profiling");
600 LastFrameAccessor last_frame(thread);
601 methodHandle trap_method(thread, last_frame.method());
602 int trap_bci = trap_method->bci_from(last_frame.bcp());
603 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
604 }
605
606 #ifdef CC_INTERP
607 // As legacy note_trap, but we have more arguments.
608 JRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
609 methodHandle trap_method(method);
610 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
611 JRT_END
612
613 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
614 // for each exception.
615 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
616 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
617 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
618 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
619 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
620 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
621 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
622 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
623 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
624 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
625 #endif // CC_INTERP
626
627
628 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
629 // get klass
630 InstanceKlass* klass = InstanceKlass::cast(k);
631 assert(klass->is_initialized(),
632 "this klass should have been initialized during VM initialization");
633 // create instance - do not call constructor since we may have no
634 // (java) stack space left (should assert constructor is empty)
635 Handle exception;
636 oop exception_oop = klass->allocate_instance(CHECK_(exception));
637 exception = Handle(THREAD, exception_oop);
638 if (StackTraceInThrowable) {
639 java_lang_Throwable::fill_in_stack_trace(exception);
640 }
641 return exception;
642 }
643
644 // Special handling for stack overflow: since we don't have any (java) stack
645 // space left we use the pre-allocated & pre-initialized StackOverflowError
646 // klass to create an stack overflow error instance. We do not call its
647 // constructor for the same reason (it is empty, anyway).
648 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
649 Handle exception = get_preinitialized_exception(
650 SystemDictionary::StackOverflowError_klass(),
651 CHECK);
652 // Increment counter for hs_err file reporting
653 Atomic::inc(&Exceptions::_stack_overflow_errors);
654 THROW_HANDLE(exception);
655 JRT_END
656
657 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
658 Handle exception = get_preinitialized_exception(
659 SystemDictionary::StackOverflowError_klass(),
660 CHECK);
661 java_lang_Throwable::set_message(exception(),
662 Universe::delayed_stack_overflow_error_message());
663 // Increment counter for hs_err file reporting
664 Atomic::inc(&Exceptions::_stack_overflow_errors);
665 THROW_HANDLE(exception);
666 JRT_END
667
668 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
669 // lookup exception klass
670 TempNewSymbol s = SymbolTable::new_symbol(name);
671 if (ProfileTraps) {
672 if (s == vmSymbols::java_lang_ArithmeticException()) {
673 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
674 } else if (s == vmSymbols::java_lang_NullPointerException()) {
675 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
676 }
677 }
678 // create exception
679 Handle exception = Exceptions::new_exception(thread, s, message);
680 thread->set_vm_result(exception());
681 JRT_END
682
683
684 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
685 // Produce the error message first because note_trap can safepoint
686 ResourceMark rm(thread);
687 const char* klass_name = obj->klass()->external_name();
688 // lookup exception klass
689 TempNewSymbol s = SymbolTable::new_symbol(name);
690 if (ProfileTraps) {
691 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
692 }
693 // create exception, with klass name as detail message
694 Handle exception = Exceptions::new_exception(thread, s, klass_name);
695 thread->set_vm_result(exception());
696 JRT_END
697
698 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, arrayOopDesc* a, jint index))
699 // Produce the error message first because note_trap can safepoint
700 ResourceMark rm(thread);
701 stringStream ss;
702 ss.print("Index %d out of bounds for length %d", index, a->length());
703
704 if (ProfileTraps) {
705 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
706 }
707
708 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
709 JRT_END
710
711 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
712 JavaThread* thread, oopDesc* obj))
713
714 // Produce the error message first because note_trap can safepoint
715 ResourceMark rm(thread);
716 char* message = SharedRuntime::generate_class_cast_message(
717 thread, obj->klass());
718
719 if (ProfileTraps) {
720 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
721 }
722
723 // create exception
724 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
725 JRT_END
726
727 // exception_handler_for_exception(...) returns the continuation address,
728 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
729 // The exception oop is returned to make sure it is preserved over GC (it
730 // is only on the stack if the exception was thrown explicitly via athrow).
731 // During this operation, the expression stack contains the values for the
732 // bci where the exception happened. If the exception was propagated back
733 // from a call, the expression stack contains the values for the bci at the
734 // invoke w/o arguments (i.e., as if one were inside the call).
735 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
736
737 LastFrameAccessor last_frame(thread);
738 Handle h_exception(thread, exception);
739 methodHandle h_method (thread, last_frame.method());
740 constantPoolHandle h_constants(thread, h_method->constants());
741 bool should_repeat;
742 int handler_bci;
743 int current_bci = last_frame.bci();
744
745 if (thread->frames_to_pop_failed_realloc() > 0) {
746 // Allocation of scalar replaced object used in this frame
747 // failed. Unconditionally pop the frame.
748 thread->dec_frames_to_pop_failed_realloc();
749 thread->set_vm_result(h_exception());
750 // If the method is synchronized we already unlocked the monitor
751 // during deoptimization so the interpreter needs to skip it when
752 // the frame is popped.
753 thread->set_do_not_unlock_if_synchronized(true);
754 #ifdef CC_INTERP
755 return (address) -1;
756 #else
757 return Interpreter::remove_activation_entry();
758 #endif
759 }
760
761 // Need to do this check first since when _do_not_unlock_if_synchronized
762 // is set, we don't want to trigger any classloading which may make calls
763 // into java, or surprisingly find a matching exception handler for bci 0
764 // since at this moment the method hasn't been "officially" entered yet.
765 if (thread->do_not_unlock_if_synchronized()) {
766 ResourceMark rm;
767 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
768 thread->set_vm_result(exception);
769 #ifdef CC_INTERP
770 return (address) -1;
771 #else
772 return Interpreter::remove_activation_entry();
773 #endif
774 }
775
776 do {
777 should_repeat = false;
778
779 // assertions
780 #ifdef ASSERT
781 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
782 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
783 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
784 if (ExitVMOnVerifyError) vm_exit(-1);
785 ShouldNotReachHere();
786 }
787 #endif
788
789 // tracing
790 if (log_is_enabled(Info, exceptions)) {
791 ResourceMark rm(thread);
792 stringStream tempst;
793 tempst.print("interpreter method <%s>\n"
794 " at bci %d for thread " INTPTR_FORMAT " (%s)",
795 h_method->print_value_string(), current_bci, p2i(thread), thread->name());
796 Exceptions::log_exception(h_exception, tempst.as_string());
797 }
798 // Don't go paging in something which won't be used.
799 // else if (extable->length() == 0) {
800 // // disabled for now - interpreter is not using shortcut yet
801 // // (shortcut is not to call runtime if we have no exception handlers)
802 // // warning("performance bug: should not call runtime if method has no exception handlers");
803 // }
804 // for AbortVMOnException flag
805 Exceptions::debug_check_abort(h_exception);
806
807 // exception handler lookup
808 Klass* klass = h_exception->klass();
809 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
810 if (HAS_PENDING_EXCEPTION) {
811 // We threw an exception while trying to find the exception handler.
812 // Transfer the new exception to the exception handle which will
813 // be set into thread local storage, and do another lookup for an
814 // exception handler for this exception, this time starting at the
815 // BCI of the exception handler which caused the exception to be
816 // thrown (bug 4307310).
817 h_exception = Handle(THREAD, PENDING_EXCEPTION);
818 CLEAR_PENDING_EXCEPTION;
819 if (handler_bci >= 0) {
820 current_bci = handler_bci;
821 should_repeat = true;
822 }
823 }
824 } while (should_repeat == true);
825
826 #if INCLUDE_JVMCI
827 if (EnableJVMCI && h_method->method_data() != NULL) {
828 ResourceMark rm(thread);
829 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
830 if (pdata != NULL && pdata->is_BitData()) {
831 BitData* bit_data = (BitData*) pdata;
832 bit_data->set_exception_seen();
833 }
834 }
835 #endif
836
837 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
838 // time throw or a stack unwinding throw and accordingly notify the debugger
839 if (JvmtiExport::can_post_on_exceptions()) {
840 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
841 }
842
843 #ifdef CC_INTERP
844 address continuation = (address)(intptr_t) handler_bci;
845 #else
846 address continuation = NULL;
847 #endif
848 address handler_pc = NULL;
849 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
850 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
851 // handler in this method, or (b) after a stack overflow there is not yet
852 // enough stack space available to reprotect the stack.
853 #ifndef CC_INTERP
854 continuation = Interpreter::remove_activation_entry();
855 #endif
856 #if COMPILER2_OR_JVMCI
857 // Count this for compilation purposes
858 h_method->interpreter_throwout_increment(THREAD);
859 #endif
860 } else {
861 // handler in this method => change bci/bcp to handler bci/bcp and continue there
862 handler_pc = h_method->code_base() + handler_bci;
863 #ifndef CC_INTERP
864 set_bcp_and_mdp(handler_pc, thread);
865 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
866 #endif
867 }
868 // notify debugger of an exception catch
869 // (this is good for exceptions caught in native methods as well)
870 if (JvmtiExport::can_post_on_exceptions()) {
871 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
872 }
873
874 thread->set_vm_result(h_exception());
875 return continuation;
876 JRT_END
877
878
879 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
880 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
881 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
882 JRT_END
883
884
885 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
886 THROW(vmSymbols::java_lang_AbstractMethodError());
887 JRT_END
888
889 // This method is called from the "abstract_entry" of the interpreter.
890 // At that point, the arguments have already been removed from the stack
891 // and therefore we don't have the receiver object at our fingertips. (Though,
892 // on some platforms the receiver still resides in a register...). Thus,
893 // we have no choice but print an error message not containing the receiver
894 // type.
895 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* thread,
896 Method* missingMethod))
897 ResourceMark rm(thread);
898 assert(missingMethod != NULL, "sanity");
899 methodHandle m(thread, missingMethod);
900 LinkResolver::throw_abstract_method_error(m, THREAD);
901 JRT_END
902
903 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* thread,
904 Klass* recvKlass,
905 Method* missingMethod))
906 ResourceMark rm(thread);
907 methodHandle mh = methodHandle(thread, missingMethod);
908 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
909 JRT_END
910
911
912 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
913 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
914 JRT_END
915
916 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* thread,
917 Klass* recvKlass,
918 Klass* interfaceKlass))
919 ResourceMark rm(thread);
920 char buf[1000];
921 buf[0] = '\0';
922 jio_snprintf(buf, sizeof(buf),
923 "Class %s does not implement the requested interface %s",
924 recvKlass ? recvKlass->external_name() : "NULL",
925 interfaceKlass ? interfaceKlass->external_name() : "NULL");
926 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
927 JRT_END
928
929 //------------------------------------------------------------------------------------------------------------------------
930 // Fields
931 //
932
933 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
934 Thread* THREAD = thread;
935 // resolve field
936 fieldDescriptor info;
937 LastFrameAccessor last_frame(thread);
938 constantPoolHandle pool(thread, last_frame.method()->constants());
939 methodHandle m(thread, last_frame.method());
940 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
941 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
942 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
943 bool is_value = bytecode == Bytecodes::_withfield;
944
945 {
946 JvmtiHideSingleStepping jhss(thread);
947 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
948 m, bytecode, CHECK);
949 } // end JvmtiHideSingleStepping
950
951 // check if link resolution caused cpCache to be updated
952 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
953 if (cp_cache_entry->is_resolved(bytecode)) return;
954
955 // compute auxiliary field attributes
956 TosState state = as_TosState(info.field_type());
957
958 // Resolution of put instructions on final fields is delayed. That is required so that
959 // exceptions are thrown at the correct place (when the instruction is actually invoked).
960 // If we do not resolve an instruction in the current pass, leaving the put_code
961 // set to zero will cause the next put instruction to the same field to reresolve.
962
963 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
964 // to final instance fields with updates originating from a method different than <init>)
965 // is inhibited. A putfield instruction targeting an instance final field must throw
966 // an IllegalAccessError if the instruction is not in an instance
967 // initializer method <init>. If resolution were not inhibited, a putfield
968 // in an initializer method could be resolved in the initializer. Subsequent
969 // putfield instructions to the same field would then use cached information.
970 // As a result, those instructions would not pass through the VM. That is,
971 // checks in resolve_field_access() would not be executed for those instructions
972 // and the required IllegalAccessError would not be thrown.
973 //
974 // Also, we need to delay resolving getstatic and putstatic instructions until the
975 // class is initialized. This is required so that access to the static
976 // field will call the initialization function every time until the class
977 // is completely initialized ala. in 2.17.5 in JVM Specification.
978 InstanceKlass* klass = info.field_holder();
979 bool uninitialized_static = is_static && !klass->is_initialized();
980 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
981 info.has_initialized_final_update();
982 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
983
984 Bytecodes::Code get_code = (Bytecodes::Code)0;
985 Bytecodes::Code put_code = (Bytecodes::Code)0;
986 if (!uninitialized_static) {
987 if (is_static) {
988 get_code = Bytecodes::_getstatic;
989 } else {
990 get_code = Bytecodes::_getfield;
991 }
992 if (is_put && is_value) {
993 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
994 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
995 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
996 }
997 }
998
999 cp_cache_entry->set_field(
1000 get_code,
1001 put_code,
1002 info.field_holder(),
1003 info.index(),
1004 info.offset(),
1005 state,
1006 info.access_flags().is_final(),
1007 info.access_flags().is_volatile(),
1008 info.is_flattened(),
1009 info.is_flattenable(),
1010 pool->pool_holder()
1011 );
1012 }
1013
1014
1015 //------------------------------------------------------------------------------------------------------------------------
1016 // Synchronization
1017 //
1018 // The interpreter's synchronization code is factored out so that it can
1019 // be shared by method invocation and synchronized blocks.
1020 //%note synchronization_3
1021
1022 //%note monitor_1
1023 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
1024 #ifdef ASSERT
1025 thread->last_frame().interpreter_frame_verify_monitor(elem);
1026 #endif
1027 if (PrintBiasedLockingStatistics) {
1028 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
1029 }
1030 Handle h_obj(thread, elem->obj());
1031 assert(Universe::heap()->is_in_or_null(h_obj()),
1032 "must be NULL or an object");
1033 ObjectSynchronizer::enter(h_obj, elem->lock(), CHECK);
1034 assert(Universe::heap()->is_in_or_null(elem->obj()),
1035 "must be NULL or an object");
1036 #ifdef ASSERT
1037 thread->last_frame().interpreter_frame_verify_monitor(elem);
1038 #endif
1039 JRT_END
1040
1041
1042 //%note monitor_1
1043 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
1044 #ifdef ASSERT
1045 thread->last_frame().interpreter_frame_verify_monitor(elem);
1046 #endif
1047 Handle h_obj(thread, elem->obj());
1048 assert(Universe::heap()->is_in_or_null(h_obj()),
1049 "must be NULL or an object");
1050 if (elem == NULL || h_obj()->is_unlocked()) {
1051 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1052 }
1053 ObjectSynchronizer::exit(h_obj(), elem->lock(), thread);
1054 // Free entry. This must be done here, since a pending exception might be installed on
1055 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
1056 elem->set_obj(NULL);
1057 #ifdef ASSERT
1058 thread->last_frame().interpreter_frame_verify_monitor(elem);
1059 #endif
1060 JRT_END
1061
1062
1063 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
1064 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1065 JRT_END
1066
1067
1068 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
1069 // Returns an illegal exception to install into the current thread. The
1070 // pending_exception flag is cleared so normal exception handling does not
1071 // trigger. Any current installed exception will be overwritten. This
1072 // method will be called during an exception unwind.
1073
1074 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1075 Handle exception(thread, thread->vm_result());
1076 assert(exception() != NULL, "vm result should be set");
1077 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1078 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
1079 exception = get_preinitialized_exception(
1080 SystemDictionary::IllegalMonitorStateException_klass(),
1081 CATCH);
1082 }
1083 thread->set_vm_result(exception());
1084 JRT_END
1085
1086
1087 //------------------------------------------------------------------------------------------------------------------------
1088 // Invokes
1089
1090 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
1091 return method->orig_bytecode_at(method->bci_from(bcp));
1092 JRT_END
1093
1094 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
1095 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1096 JRT_END
1097
1098 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
1099 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
1100 JRT_END
1101
1102 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
1103 Thread* THREAD = thread;
1104 LastFrameAccessor last_frame(thread);
1105 // extract receiver from the outgoing argument list if necessary
1106 Handle receiver(thread, NULL);
1107 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1108 bytecode == Bytecodes::_invokespecial) {
1109 ResourceMark rm(thread);
1110 methodHandle m (thread, last_frame.method());
1111 Bytecode_invoke call(m, last_frame.bci());
1112 Symbol* signature = call.signature();
1113 receiver = Handle(thread, last_frame.callee_receiver(signature));
1114
1115 assert(Universe::heap()->is_in_or_null(receiver()),
1116 "sanity check");
1117 assert(receiver.is_null() ||
1118 !Universe::heap()->is_in(receiver->klass()),
1119 "sanity check");
1120 }
1121
1122 // resolve method
1123 CallInfo info;
1124 constantPoolHandle pool(thread, last_frame.method()->constants());
1125
1126 {
1127 JvmtiHideSingleStepping jhss(thread);
1128 LinkResolver::resolve_invoke(info, receiver, pool,
1129 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1130 CHECK);
1131 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
1132 int retry_count = 0;
1133 while (info.resolved_method()->is_old()) {
1134 // It is very unlikely that method is redefined more than 100 times
1135 // in the middle of resolve. If it is looping here more than 100 times
1136 // means then there could be a bug here.
1137 guarantee((retry_count++ < 100),
1138 "Could not resolve to latest version of redefined method");
1139 // method is redefined in the middle of resolve so re-try.
1140 LinkResolver::resolve_invoke(info, receiver, pool,
1141 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1142 CHECK);
1143 }
1144 }
1145 } // end JvmtiHideSingleStepping
1146
1147 // check if link resolution caused cpCache to be updated
1148 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1149 if (cp_cache_entry->is_resolved(bytecode)) return;
1150
1151 #ifdef ASSERT
1152 if (bytecode == Bytecodes::_invokeinterface) {
1153 if (info.resolved_method()->method_holder() ==
1154 SystemDictionary::Object_klass()) {
1155 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1156 // (see also CallInfo::set_interface for details)
1157 assert(info.call_kind() == CallInfo::vtable_call ||
1158 info.call_kind() == CallInfo::direct_call, "");
1159 methodHandle rm = info.resolved_method();
1160 assert(rm->is_final() || info.has_vtable_index(),
1161 "should have been set already");
1162 } else if (!info.resolved_method()->has_itable_index()) {
1163 // Resolved something like CharSequence.toString. Use vtable not itable.
1164 assert(info.call_kind() != CallInfo::itable_call, "");
1165 } else {
1166 // Setup itable entry
1167 assert(info.call_kind() == CallInfo::itable_call, "");
1168 int index = info.resolved_method()->itable_index();
1169 assert(info.itable_index() == index, "");
1170 }
1171 } else if (bytecode == Bytecodes::_invokespecial) {
1172 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1173 } else {
1174 assert(info.call_kind() == CallInfo::direct_call ||
1175 info.call_kind() == CallInfo::vtable_call, "");
1176 }
1177 #endif
1178 // Get sender or sender's unsafe_anonymous_host, and only set cpCache entry to resolved if
1179 // it is not an interface. The receiver for invokespecial calls within interface
1180 // methods must be checked for every call.
1181 InstanceKlass* sender = pool->pool_holder();
1182 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
1183
1184 switch (info.call_kind()) {
1185 case CallInfo::direct_call:
1186 cp_cache_entry->set_direct_call(
1187 bytecode,
1188 info.resolved_method(),
1189 sender->is_interface());
1190 break;
1191 case CallInfo::vtable_call:
1192 cp_cache_entry->set_vtable_call(
1193 bytecode,
1194 info.resolved_method(),
1195 info.vtable_index());
1196 break;
1197 case CallInfo::itable_call:
1198 cp_cache_entry->set_itable_call(
1199 bytecode,
1200 info.resolved_klass(),
1201 info.resolved_method(),
1202 info.itable_index());
1203 break;
1204 default: ShouldNotReachHere();
1205 }
1206 }
1207
1208
1209 // First time execution: Resolve symbols, create a permanent MethodType object.
1210 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1211 Thread* THREAD = thread;
1212 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1213 LastFrameAccessor last_frame(thread);
1214
1215 // resolve method
1216 CallInfo info;
1217 constantPoolHandle pool(thread, last_frame.method()->constants());
1218 {
1219 JvmtiHideSingleStepping jhss(thread);
1220 LinkResolver::resolve_invoke(info, Handle(), pool,
1221 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1222 CHECK);
1223 } // end JvmtiHideSingleStepping
1224
1225 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1226 cp_cache_entry->set_method_handle(pool, info);
1227 }
1228
1229 // First time execution: Resolve symbols, create a permanent CallSite object.
1230 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1231 Thread* THREAD = thread;
1232 LastFrameAccessor last_frame(thread);
1233 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1234
1235 // resolve method
1236 CallInfo info;
1237 constantPoolHandle pool(thread, last_frame.method()->constants());
1238 int index = last_frame.get_index_u4(bytecode);
1239 {
1240 JvmtiHideSingleStepping jhss(thread);
1241 LinkResolver::resolve_invoke(info, Handle(), pool,
1242 index, bytecode, CHECK);
1243 } // end JvmtiHideSingleStepping
1244
1245 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1246 cp_cache_entry->set_dynamic_call(pool, info);
1247 }
1248
1249 // This function is the interface to the assembly code. It returns the resolved
1250 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1251 // This function will check for redefinition!
1252 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1253 switch (bytecode) {
1254 case Bytecodes::_getstatic:
1255 case Bytecodes::_putstatic:
1256 case Bytecodes::_getfield:
1257 case Bytecodes::_putfield:
1258 case Bytecodes::_withfield:
1259 resolve_get_put(thread, bytecode);
1260 break;
1261 case Bytecodes::_invokevirtual:
1262 case Bytecodes::_invokespecial:
1263 case Bytecodes::_invokestatic:
1264 case Bytecodes::_invokeinterface:
1265 resolve_invoke(thread, bytecode);
1266 break;
1267 case Bytecodes::_invokehandle:
1268 resolve_invokehandle(thread);
1269 break;
1270 case Bytecodes::_invokedynamic:
1271 resolve_invokedynamic(thread);
1272 break;
1273 default:
1274 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1275 break;
1276 }
1277 }
1278 JRT_END
1279
1280 //------------------------------------------------------------------------------------------------------------------------
1281 // Miscellaneous
1282
1283
1284 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1285 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1286 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1287 if (branch_bcp != NULL && nm != NULL) {
1288 // This was a successful request for an OSR nmethod. Because
1289 // frequency_counter_overflow_inner ends with a safepoint check,
1290 // nm could have been unloaded so look it up again. It's unsafe
1291 // to examine nm directly since it might have been freed and used
1292 // for something else.
1293 LastFrameAccessor last_frame(thread);
1294 Method* method = last_frame.method();
1295 int bci = method->bci_from(last_frame.bcp());
1296 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1297 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1298 if (nm != NULL && bs_nm != NULL) {
1299 // in case the transition passed a safepoint we need to barrier this again
1300 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1301 nm = NULL;
1302 }
1303 }
1304 }
1305 if (nm != NULL && thread->is_interp_only_mode()) {
1306 // Normally we never get an nm if is_interp_only_mode() is true, because
1307 // policy()->event has a check for this and won't compile the method when
1308 // true. However, it's possible for is_interp_only_mode() to become true
1309 // during the compilation. We don't want to return the nm in that case
1310 // because we want to continue to execute interpreted.
1311 nm = NULL;
1312 }
1313 #ifndef PRODUCT
1314 if (TraceOnStackReplacement) {
1315 if (nm != NULL) {
1316 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1317 nm->print();
1318 }
1319 }
1320 #endif
1321 return nm;
1322 }
1323
1324 JRT_ENTRY(nmethod*,
1325 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1326 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1327 // flag, in case this method triggers classloading which will call into Java.
1328 UnlockFlagSaver fs(thread);
1329
1330 LastFrameAccessor last_frame(thread);
1331 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1332 methodHandle method(thread, last_frame.method());
1333 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1334 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1335
1336 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1337 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1338 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1339
1340 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1341 if (osr_nm != NULL && bs_nm != NULL) {
1342 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1343 osr_nm = NULL;
1344 }
1345 }
1346
1347 if (osr_nm != NULL) {
1348 // We may need to do on-stack replacement which requires that no
1349 // monitors in the activation are biased because their
1350 // BasicObjectLocks will need to migrate during OSR. Force
1351 // unbiasing of all monitors in the activation now (even though
1352 // the OSR nmethod might be invalidated) because we don't have a
1353 // safepoint opportunity later once the migration begins.
1354 if (UseBiasedLocking) {
1355 ResourceMark rm;
1356 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1357 for( BasicObjectLock *kptr = last_frame.monitor_end();
1358 kptr < last_frame.monitor_begin();
1359 kptr = last_frame.next_monitor(kptr) ) {
1360 if( kptr->obj() != NULL ) {
1361 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1362 }
1363 }
1364 BiasedLocking::revoke(objects_to_revoke, thread);
1365 }
1366 }
1367 return osr_nm;
1368 JRT_END
1369
1370 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1371 assert(ProfileInterpreter, "must be profiling interpreter");
1372 int bci = method->bci_from(cur_bcp);
1373 MethodData* mdo = method->method_data();
1374 if (mdo == NULL) return 0;
1375 return mdo->bci_to_di(bci);
1376 JRT_END
1377
1378 JRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1379 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1380 // flag, in case this method triggers classloading which will call into Java.
1381 UnlockFlagSaver fs(thread);
1382
1383 assert(ProfileInterpreter, "must be profiling interpreter");
1384 LastFrameAccessor last_frame(thread);
1385 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1386 methodHandle method(thread, last_frame.method());
1387 Method::build_interpreter_method_data(method, THREAD);
1388 if (HAS_PENDING_EXCEPTION) {
1389 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1390 CLEAR_PENDING_EXCEPTION;
1391 // and fall through...
1392 }
1393 JRT_END
1394
1395
1396 #ifdef ASSERT
1397 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1398 assert(ProfileInterpreter, "must be profiling interpreter");
1399
1400 MethodData* mdo = method->method_data();
1401 assert(mdo != NULL, "must not be null");
1402
1403 int bci = method->bci_from(bcp);
1404
1405 address mdp2 = mdo->bci_to_dp(bci);
1406 if (mdp != mdp2) {
1407 ResourceMark rm;
1408 ResetNoHandleMark rnm; // In a LEAF entry.
1409 HandleMark hm;
1410 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1411 int current_di = mdo->dp_to_di(mdp);
1412 int expected_di = mdo->dp_to_di(mdp2);
1413 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1414 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1415 int approx_bci = -1;
1416 if (current_di >= 0) {
1417 approx_bci = mdo->data_at(current_di)->bci();
1418 }
1419 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1420 mdo->print_on(tty);
1421 method->print_codes();
1422 }
1423 assert(mdp == mdp2, "wrong mdp");
1424 JRT_END
1425 #endif // ASSERT
1426
1427 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1428 assert(ProfileInterpreter, "must be profiling interpreter");
1429 ResourceMark rm(thread);
1430 HandleMark hm(thread);
1431 LastFrameAccessor last_frame(thread);
1432 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1433 MethodData* h_mdo = last_frame.method()->method_data();
1434
1435 // Grab a lock to ensure atomic access to setting the return bci and
1436 // the displacement. This can block and GC, invalidating all naked oops.
1437 MutexLocker ml(RetData_lock);
1438
1439 // ProfileData is essentially a wrapper around a derived oop, so we
1440 // need to take the lock before making any ProfileData structures.
1441 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1442 guarantee(data != NULL, "profile data must be valid");
1443 RetData* rdata = data->as_RetData();
1444 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1445 last_frame.set_mdp(new_mdp);
1446 JRT_END
1447
1448 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1449 MethodCounters* mcs = Method::build_method_counters(m, thread);
1450 if (HAS_PENDING_EXCEPTION) {
1451 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1452 CLEAR_PENDING_EXCEPTION;
1453 }
1454 return mcs;
1455 JRT_END
1456
1457
1458 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1459 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1460 // stack traversal automatically takes care of preserving arguments for invoke, so
1461 // this is no longer needed.
1462
1463 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1464 // if this is called during a safepoint
1465
1466 if (JvmtiExport::should_post_single_step()) {
1467 // We are called during regular safepoints and when the VM is
1468 // single stepping. If any thread is marked for single stepping,
1469 // then we may have JVMTI work to do.
1470 LastFrameAccessor last_frame(thread);
1471 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1472 }
1473 JRT_END
1474
1475 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1476 ConstantPoolCacheEntry *cp_entry))
1477
1478 // check the access_flags for the field in the klass
1479
1480 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1481 int index = cp_entry->field_index();
1482 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1483
1484 bool is_static = (obj == NULL);
1485 HandleMark hm(thread);
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(thread, obj);
1491 }
1492 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1493 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1494 LastFrameAccessor last_frame(thread);
1495 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1496 JRT_END
1497
1498 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1499 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1500
1501 Klass* k = cp_entry->f1_as_klass();
1502
1503 // check the access_flags for the field in the klass
1504 InstanceKlass* ik = InstanceKlass::cast(k);
1505 int index = cp_entry->field_index();
1506 // bail out if field modifications are not watched
1507 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1508
1509 char sig_type = '\0';
1510
1511 switch(cp_entry->flag_state()) {
1512 case btos: sig_type = 'B'; break;
1513 case ztos: sig_type = 'Z'; break;
1514 case ctos: sig_type = 'C'; break;
1515 case stos: sig_type = 'S'; break;
1516 case itos: sig_type = 'I'; break;
1517 case ftos: sig_type = 'F'; break;
1518 case atos: sig_type = 'L'; break;
1519 case ltos: sig_type = 'J'; break;
1520 case dtos: sig_type = 'D'; break;
1521 default: ShouldNotReachHere(); return;
1522 }
1523
1524 // Both Q-signatures and L-signatures are mapped to atos
1525 if (cp_entry->flag_state() == atos && ik->field_signature(index)->is_Q_signature()) {
1526 sig_type = 'Q';
1527 }
1528
1529 bool is_static = (obj == NULL);
1530
1531 HandleMark hm(thread);
1532 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1533 jvalue fvalue;
1534 #ifdef _LP64
1535 fvalue = *value;
1536 #else
1537 // Long/double values are stored unaligned and also noncontiguously with
1538 // tagged stacks. We can't just do a simple assignment even in the non-
1539 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1540 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1541 // We assume that the two halves of longs/doubles are stored in interpreter
1542 // stack slots in platform-endian order.
1543 jlong_accessor u;
1544 jint* newval = (jint*)value;
1545 u.words[0] = newval[0];
1546 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1547 fvalue.j = u.long_value;
1548 #endif // _LP64
1549
1550 Handle h_obj;
1551 if (!is_static) {
1552 // non-static field accessors have an object, but we need a handle
1553 h_obj = Handle(thread, obj);
1554 }
1555
1556 LastFrameAccessor last_frame(thread);
1557 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1558 fid, sig_type, &fvalue);
1559 JRT_END
1560
1561 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1562 LastFrameAccessor last_frame(thread);
1563 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1564 JRT_END
1565
1566
1567 JRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1568 LastFrameAccessor last_frame(thread);
1569 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1570 JRT_END
1571
1572 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1573 {
1574 return (Interpreter::contains(pc) ? 1 : 0);
1575 }
1576 JRT_END
1577
1578
1579 // Implementation of SignatureHandlerLibrary
1580
1581 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1582 // Dummy definition (else normalization method is defined in CPU
1583 // dependant code)
1584 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1585 return fingerprint;
1586 }
1587 #endif
1588
1589 address SignatureHandlerLibrary::set_handler_blob() {
1590 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1591 if (handler_blob == NULL) {
1592 return NULL;
1593 }
1594 address handler = handler_blob->code_begin();
1595 _handler_blob = handler_blob;
1596 _handler = handler;
1597 return handler;
1598 }
1599
1600 void SignatureHandlerLibrary::initialize() {
1601 if (_fingerprints != NULL) {
1602 return;
1603 }
1604 if (set_handler_blob() == NULL) {
1605 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1606 }
1607
1608 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1609 SignatureHandlerLibrary::buffer_size);
1610 _buffer = bb->code_begin();
1611
1612 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1613 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1614 }
1615
1616 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1617 address handler = _handler;
1618 int insts_size = buffer->pure_insts_size();
1619 if (handler + insts_size > _handler_blob->code_end()) {
1620 // get a new handler blob
1621 handler = set_handler_blob();
1622 }
1623 if (handler != NULL) {
1624 memcpy(handler, buffer->insts_begin(), insts_size);
1625 pd_set_handler(handler);
1626 ICache::invalidate_range(handler, insts_size);
1627 _handler = handler + insts_size;
1628 }
1629 return handler;
1630 }
1631
1632 void SignatureHandlerLibrary::add(const methodHandle& method) {
1633 if (method->signature_handler() == NULL) {
1634 // use slow signature handler if we can't do better
1635 int handler_index = -1;
1636 // check if we can use customized (fast) signature handler
1637 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1638 // use customized signature handler
1639 MutexLocker mu(SignatureHandlerLibrary_lock);
1640 // make sure data structure is initialized
1641 initialize();
1642 // lookup method signature's fingerprint
1643 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1644 // allow CPU dependant code to optimize the fingerprints for the fast handler
1645 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1646 handler_index = _fingerprints->find(fingerprint);
1647 // create handler if necessary
1648 if (handler_index < 0) {
1649 ResourceMark rm;
1650 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1651 CodeBuffer buffer((address)(_buffer + align_offset),
1652 SignatureHandlerLibrary::buffer_size - align_offset);
1653 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1654 // copy into code heap
1655 address handler = set_handler(&buffer);
1656 if (handler == NULL) {
1657 // use slow signature handler (without memorizing it in the fingerprints)
1658 } else {
1659 // debugging suppport
1660 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1661 ttyLocker ttyl;
1662 tty->cr();
1663 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1664 _handlers->length(),
1665 (method->is_static() ? "static" : "receiver"),
1666 method->name_and_sig_as_C_string(),
1667 fingerprint,
1668 buffer.insts_size());
1669 if (buffer.insts_size() > 0) {
1670 Disassembler::decode(handler, handler + buffer.insts_size());
1671 }
1672 #ifndef PRODUCT
1673 address rh_begin = Interpreter::result_handler(method()->result_type());
1674 if (CodeCache::contains(rh_begin)) {
1675 // else it might be special platform dependent values
1676 tty->print_cr(" --- associated result handler ---");
1677 address rh_end = rh_begin;
1678 while (*(int*)rh_end != 0) {
1679 rh_end += sizeof(int);
1680 }
1681 Disassembler::decode(rh_begin, rh_end);
1682 } else {
1683 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1684 }
1685 #endif
1686 }
1687 // add handler to library
1688 _fingerprints->append(fingerprint);
1689 _handlers->append(handler);
1690 // set handler index
1691 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1692 handler_index = _fingerprints->length() - 1;
1693 }
1694 }
1695 // Set handler under SignatureHandlerLibrary_lock
1696 if (handler_index < 0) {
1697 // use generic signature handler
1698 method->set_signature_handler(Interpreter::slow_signature_handler());
1699 } else {
1700 // set handler
1701 method->set_signature_handler(_handlers->at(handler_index));
1702 }
1703 } else {
1704 DEBUG_ONLY(Thread::current()->check_possible_safepoint());
1705 // use generic signature handler
1706 method->set_signature_handler(Interpreter::slow_signature_handler());
1707 }
1708 }
1709 #ifdef ASSERT
1710 int handler_index = -1;
1711 int fingerprint_index = -2;
1712 {
1713 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1714 // in any way if accessed from multiple threads. To avoid races with another
1715 // thread which may change the arrays in the above, mutex protected block, we
1716 // have to protect this read access here with the same mutex as well!
1717 MutexLocker mu(SignatureHandlerLibrary_lock);
1718 if (_handlers != NULL) {
1719 handler_index = _handlers->find(method->signature_handler());
1720 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1721 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1722 fingerprint_index = _fingerprints->find(fingerprint);
1723 }
1724 }
1725 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1726 handler_index == fingerprint_index, "sanity check");
1727 #endif // ASSERT
1728 }
1729
1730 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1731 int handler_index = -1;
1732 // use customized signature handler
1733 MutexLocker mu(SignatureHandlerLibrary_lock);
1734 // make sure data structure is initialized
1735 initialize();
1736 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1737 handler_index = _fingerprints->find(fingerprint);
1738 // create handler if necessary
1739 if (handler_index < 0) {
1740 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1741 tty->cr();
1742 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1743 _handlers->length(),
1744 p2i(handler),
1745 fingerprint);
1746 }
1747 _fingerprints->append(fingerprint);
1748 _handlers->append(handler);
1749 } else {
1750 if (PrintSignatureHandlers) {
1751 tty->cr();
1752 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1753 _handlers->length(),
1754 fingerprint,
1755 p2i(_handlers->at(handler_index)),
1756 p2i(handler));
1757 }
1758 }
1759 }
1760
1761
1762 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1763 address SignatureHandlerLibrary::_handler = NULL;
1764 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1765 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1766 address SignatureHandlerLibrary::_buffer = NULL;
1767
1768
1769 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1770 methodHandle m(thread, method);
1771 assert(m->is_native(), "sanity check");
1772 // lookup native function entry point if it doesn't exist
1773 bool in_base_library;
1774 if (!m->has_native_function()) {
1775 NativeLookup::lookup(m, in_base_library, CHECK);
1776 }
1777 // make sure signature handler is installed
1778 SignatureHandlerLibrary::add(m);
1779 // The interpreter entry point checks the signature handler first,
1780 // before trying to fetch the native entry point and klass mirror.
1781 // We must set the signature handler last, so that multiple processors
1782 // preparing the same method will be sure to see non-null entry & mirror.
1783 JRT_END
1784
1785 #if defined(IA32) || defined(AMD64) || defined(ARM)
1786 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1787 if (src_address == dest_address) {
1788 return;
1789 }
1790 ResetNoHandleMark rnm; // In a LEAF entry.
1791 HandleMark hm;
1792 ResourceMark rm;
1793 LastFrameAccessor last_frame(thread);
1794 assert(last_frame.is_interpreted_frame(), "");
1795 jint bci = last_frame.bci();
1796 methodHandle mh(thread, last_frame.method());
1797 Bytecode_invoke invoke(mh, bci);
1798 ArgumentSizeComputer asc(invoke.signature());
1799 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1800 Copy::conjoint_jbytes(src_address, dest_address,
1801 size_of_arguments * Interpreter::stackElementSize);
1802 JRT_END
1803 #endif
1804
1805 #if INCLUDE_JVMTI
1806 // This is a support of the JVMTI PopFrame interface.
1807 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1808 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1809 // The member_name argument is a saved reference (in local#0) to the member_name.
1810 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1811 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1812 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1813 Method* method, address bcp))
1814 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1815 if (code != Bytecodes::_invokestatic) {
1816 return;
1817 }
1818 ConstantPool* cpool = method->constants();
1819 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1820 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1821 Symbol* mname = cpool->name_ref_at(cp_index);
1822
1823 if (MethodHandles::has_member_arg(cname, mname)) {
1824 oop member_name_oop = (oop) member_name;
1825 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1826 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1827 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1828 }
1829 thread->set_vm_result(member_name_oop);
1830 } else {
1831 thread->set_vm_result(NULL);
1832 }
1833 JRT_END
1834 #endif // INCLUDE_JVMTI
1835
1836 #ifndef PRODUCT
1837 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1838 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1839 // The generated code still uses call_VM because that will set up the frame pointer for
1840 // bcp and method.
1841 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1842 LastFrameAccessor last_frame(thread);
1843 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1844 methodHandle mh(thread, last_frame.method());
1845 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1846 return preserve_this_value;
1847 JRT_END
1848 #endif // !PRODUCT