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/valueKlass.hpp"
52 #include "oops/valueArrayKlass.hpp"
53 #include "oops/valueArrayOop.hpp"
54 #include "oops/valueArrayOop.inline.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/nativeLookup.hpp"
57 #include "runtime/atomic.hpp"
58 #include "runtime/biasedLocking.hpp"
59 #include "runtime/compilationPolicy.hpp"
60 #include "runtime/deoptimization.hpp"
61 #include "runtime/fieldDescriptor.inline.hpp"
62 #include "runtime/frame.inline.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/icache.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jfieldIDWorkaround.hpp"
69 #include "runtime/osThread.hpp"
70 #include "runtime/sharedRuntime.hpp"
71 #include "runtime/stubRoutines.hpp"
72 #include "runtime/synchronizer.hpp"
73 #include "runtime/threadCritical.hpp"
74 #include "utilities/align.hpp"
75 #include "utilities/copy.hpp"
76 #include "utilities/events.hpp"
77 #include "utilities/globalDefinitions.hpp"
78 #ifdef COMPILER2
79 #include "opto/runtime.hpp"
80 #endif
81
82 class UnlockFlagSaver {
83 private:
84 JavaThread* _thread;
85 bool _do_not_unlock;
86 public:
87 UnlockFlagSaver(JavaThread* t) {
88 _thread = t;
89 _do_not_unlock = t->do_not_unlock_if_synchronized();
90 t->set_do_not_unlock_if_synchronized(false);
91 }
92 ~UnlockFlagSaver() {
93 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
94 }
95 };
96
97 // Helper class to access current interpreter state
98 class LastFrameAccessor : public StackObj {
99 frame _last_frame;
100 public:
101 LastFrameAccessor(JavaThread* thread) {
102 assert(thread == Thread::current(), "sanity");
103 _last_frame = thread->last_frame();
104 }
105 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
106 Method* method() const { return _last_frame.interpreter_frame_method(); }
107 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
108 int bci() const { return _last_frame.interpreter_frame_bci(); }
109 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
110
111 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
112 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
113
114 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
115 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
116
117 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
118 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
119 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
120 int get_index_u2_cpcache(Bytecodes::Code bc) const
121 { return bytecode().get_index_u2_cpcache(bc); }
122 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
123 int number_of_dimensions() const { return bcp()[3]; }
124 ConstantPoolCacheEntry* cache_entry_at(int i) const
125 { return method()->constants()->cache()->entry_at(i); }
126 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
127
128 oop callee_receiver(Symbol* signature) {
129 return _last_frame.interpreter_callee_receiver(signature);
130 }
131 BasicObjectLock* monitor_begin() const {
132 return _last_frame.interpreter_frame_monitor_begin();
133 }
134 BasicObjectLock* monitor_end() const {
135 return _last_frame.interpreter_frame_monitor_end();
136 }
137 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
138 return _last_frame.next_monitor_in_interpreter_frame(current);
139 }
140
141 frame& get_frame() { return _last_frame; }
142 };
143
144 //------------------------------------------------------------------------------------------------------------------------
145 // State accessors
146
147 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
148 LastFrameAccessor last_frame(thread);
149 last_frame.set_bcp(bcp);
150 if (ProfileInterpreter) {
151 // ProfileTraps uses MDOs independently of ProfileInterpreter.
152 // That is why we must check both ProfileInterpreter and mdo != NULL.
153 MethodData* mdo = last_frame.method()->method_data();
154 if (mdo != NULL) {
155 NEEDS_CLEANUP;
156 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
157 }
158 }
159 }
160
161 //------------------------------------------------------------------------------------------------------------------------
162 // Constants
163
164
165 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
166 // access constant pool
167 LastFrameAccessor last_frame(thread);
168 ConstantPool* pool = last_frame.method()->constants();
169 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
170 constantTag tag = pool->tag_at(index);
171
172 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
173 Klass* klass = pool->klass_at(index, CHECK);
174 oop java_class = klass->java_mirror();
175 thread->set_vm_result(java_class);
176 JRT_END
177
178 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
179 assert(bytecode == Bytecodes::_ldc ||
180 bytecode == Bytecodes::_ldc_w ||
181 bytecode == Bytecodes::_ldc2_w ||
182 bytecode == Bytecodes::_fast_aldc ||
183 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
184 ResourceMark rm(thread);
185 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
186 bytecode == Bytecodes::_fast_aldc_w);
187 LastFrameAccessor last_frame(thread);
188 methodHandle m (thread, last_frame.method());
189 Bytecode_loadconstant ldc(m, last_frame.bci());
190
191 // Double-check the size. (Condy can have any type.)
192 BasicType type = ldc.result_type();
193 switch (type2size[type]) {
194 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
195 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
196 default: ShouldNotReachHere();
197 }
198
199 // Resolve the constant. This does not do unboxing.
200 // But it does replace Universe::the_null_sentinel by null.
201 oop result = ldc.resolve_constant(CHECK);
202 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
203
204 #ifdef ASSERT
205 {
206 // The bytecode wrappers aren't GC-safe so construct a new one
207 Bytecode_loadconstant ldc2(m, last_frame.bci());
208 int rindex = ldc2.cache_index();
209 if (rindex < 0)
210 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
211 if (rindex >= 0) {
212 oop coop = m->constants()->resolved_references()->obj_at(rindex);
213 oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
214 assert(oopDesc::equals(roop, coop), "expected result for assembly code");
215 }
216 }
217 #endif
218 thread->set_vm_result(result);
219 if (!is_fast_aldc) {
220 // Tell the interpreter how to unbox the primitive.
221 guarantee(java_lang_boxing_object::is_instance(result, type), "");
222 int offset = java_lang_boxing_object::value_offset_in_bytes(type);
223 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
224 | (offset & ConstantPoolCacheEntry::field_index_mask));
225 thread->set_vm_result_2((Metadata*)flags);
226 }
227 }
228 JRT_END
229
230
231 //------------------------------------------------------------------------------------------------------------------------
232 // Allocation
233
234 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
235 Klass* k = pool->klass_at(index, CHECK);
236 InstanceKlass* klass = InstanceKlass::cast(k);
237
238 // Make sure we are not instantiating an abstract klass
239 klass->check_valid_for_instantiation(true, CHECK);
240
241 // Make sure klass is initialized
242 klass->initialize(CHECK);
243
244 // At this point the class may not be fully initialized
245 // because of recursive initialization. If it is fully
246 // initialized & has_finalized is not set, we rewrite
247 // it into its fast version (Note: no locking is needed
248 // here since this is an atomic byte write and can be
249 // done more than once).
250 //
251 // Note: In case of classes with has_finalized we don't
252 // rewrite since that saves us an extra check in
253 // the fast version which then would call the
254 // slow version anyway (and do a call back into
255 // Java).
256 // If we have a breakpoint, then we don't rewrite
257 // because the _breakpoint bytecode would be lost.
258 oop obj = klass->allocate_instance(CHECK);
259 thread->set_vm_result(obj);
260 JRT_END
261
262 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) {
263 switch (type) {
264 case T_BOOLEAN:
265 instance()->bool_field_put(offset, (jboolean)*((int*)addr));
266 break;
267 case T_CHAR:
268 instance()->char_field_put(offset, (jchar) *((int*)addr));
269 break;
270 case T_FLOAT:
271 instance()->float_field_put(offset, (jfloat)*((float*)addr));
272 break;
273 case T_DOUBLE:
274 instance()->double_field_put(offset, (jdouble)*((double*)addr));
275 break;
276 case T_BYTE:
277 instance()->byte_field_put(offset, (jbyte)*((int*)addr));
278 break;
279 case T_SHORT:
280 instance()->short_field_put(offset, (jshort)*((int*)addr));
281 break;
282 case T_INT:
283 instance()->int_field_put(offset, (jint)*((int*)addr));
284 break;
285 case T_LONG:
286 instance()->long_field_put(offset, (jlong)*((long long*)addr));
287 break;
288 case T_OBJECT:
289 case T_ARRAY:
290 case T_VALUETYPE:
291 fatal("Should not be handled with this method");
292 break;
293 default:
294 fatal("Unsupported BasicType");
295 }
296 }
297
298 JRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* thread, ConstantPool* pool, int index))
299 // Getting the ValueKlass
300 Klass* k = pool->klass_at(index, CHECK);
301 assert(k->is_value(), "defaultvalue argument must be the value type class");
302 ValueKlass* vklass = ValueKlass::cast(k);
303
304 vklass->initialize(THREAD);
305 oop res = vklass->default_value();
306 thread->set_vm_result(res);
307 JRT_END
308
309 JRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* thread, ConstantPoolCache* cp_cache))
310 LastFrameAccessor last_frame(thread);
311 // Getting the ValueKlass
312 int index = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_withfield));
313 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
314 assert(cp_entry->is_resolved(Bytecodes::_withfield), "Should have been resolved");
315 Klass* klass = cp_entry->f1_as_klass();
316 assert(klass->is_value(), "withfield only applies to value types");
317 ValueKlass* vklass = ValueKlass::cast(klass);
318
319 // Getting Field information
320 int offset = cp_entry->f2_as_index();
321 int field_index = cp_entry->field_index();
322 int field_offset = cp_entry->f2_as_offset();
323 Symbol* field_signature = vklass->field_signature(field_index);
324 ResourceMark rm(THREAD);
325 const char* signature = (const char *) field_signature->as_utf8();
326 BasicType field_type = char2type(signature[0]);
327
328 // Getting old value
329 frame& f = last_frame.get_frame();
330 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1;
331 int vt_offset = type2size[field_type];
332 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset);
333 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver");
334 Handle old_value_h(THREAD, old_value);
335
336 // Creating new value by copying the one passed in argument
337 instanceOop new_value = vklass->allocate_instance(
338 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
339 Handle new_value_h = Handle(THREAD, new_value);
340 int first_offset = vklass->first_field_offset();
341 vklass->value_store(vklass->data_for_oop(old_value_h()),
342 vklass->data_for_oop(new_value_h()), true, false);
343
344 // Updating the field specified in arguments
345 if (field_type == T_ARRAY || field_type == T_OBJECT) {
346 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
347 assert(aoop == NULL || oopDesc::is_oop(aoop),"argument must be a reference type");
348 new_value_h()->obj_field_put(field_offset, aoop);
349 } else if (field_type == T_VALUETYPE) {
350 if (cp_entry->is_flattened()) {
351 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
352 if (vt_oop == NULL) {
353 THROW_(vmSymbols::java_lang_NullPointerException(),
354 (type2size[field_type] * AbstractInterpreter::stackElementSize));
355 }
356 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type");
357 Klass* field_k = vklass->get_value_field_klass(field_index);
358 ValueKlass* field_vk = ValueKlass::cast(field_k);
359 assert(field_vk == vt_oop->klass(), "Must match");
360 field_vk->value_store(field_vk->data_for_oop(vt_oop),
361 ((char*)(oopDesc*)new_value_h()) + field_offset, false, false);
362 } else { // not flattened
363 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
364 if (voop == NULL && cp_entry->is_flattenable()) {
365 THROW_(vmSymbols::java_lang_NullPointerException(),
366 (type2size[field_type] * AbstractInterpreter::stackElementSize));
367 }
368 assert(voop == NULL || oopDesc::is_oop(voop),"checking argument");
369 new_value_h()->obj_field_put(field_offset, voop);
370 }
371 } else { // not T_OBJECT nor T_ARRAY nor T_VALUETYPE
372 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx);
373 copy_primitive_argument(addr, new_value_h, field_offset, field_type);
374 }
375
376 // returning result
377 thread->set_vm_result(new_value_h());
378 return (type2size[field_type] + type2size[T_OBJECT]) * AbstractInterpreter::stackElementSize;
379 JRT_END
380
381 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_value_field(JavaThread* thread, oopDesc* mirror, int index))
382 // The interpreter tries to access a flattenable static field that has not been initialized.
383 // This situation can happen only if the load or initialization of the field failed during step 8 of
384 // the initialization of the holder of the field. The code below tries to load and initialize
385 // the field's class again in order to throw likely the same exception or error as the one that caused
386 // the field initialization to fail.
387 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
388 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
389 int offset = klass->field_offset(index);
390 Klass* field_k = klass->get_value_field_klass_or_null(index);
391 if (field_k == NULL) {
392 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD),
393 Handle(THREAD, klass->class_loader()),
394 Handle(THREAD, klass->protection_domain()),
395 true, CHECK);
396 assert(field_k != NULL, "Should have been loaded or an exception thrown above");
397 klass->set_value_field_klass(index, field_k);
398 }
399 field_k->initialize(CHECK);
400 fatal("An exception should have been thrown above");
401 JRT_END
402
403 JRT_ENTRY(void, InterpreterRuntime::uninitialized_instance_value_field(JavaThread* thread, oopDesc* obj, int index))
404 instanceHandle obj_h(THREAD, (instanceOop)obj);
405 InstanceKlass* klass = InstanceKlass::cast(obj_h()->klass());
406 Klass* field_k = klass->get_value_field_klass_or_null(index);
407 assert(field_k != NULL, "Must have been initialized");
408 ValueKlass* field_vklass = ValueKlass::cast(field_k);
409 assert(field_vklass->is_initialized(), "Must have been initialized at this point");
410 instanceOop res = (instanceOop)field_vklass->default_value();
411 thread->set_vm_result(res);
412 JRT_END
413
414 JRT_ENTRY(void, InterpreterRuntime::write_flattened_value(JavaThread* thread, oopDesc* value, int offset, oopDesc* rcv))
415 assert(oopDesc::is_oop(value), "Sanity check");
416 assert(oopDesc::is_oop(rcv), "Sanity check");
417 assert(value->is_value(), "Sanity check");
418
419 ValueKlass* vklass = ValueKlass::cast(value->klass());
420 if (!vklass->is_empty_value()) {
421 vklass->value_store(vklass->data_for_oop(value), ((char*)(oopDesc*)rcv) + offset, true, true);
422 }
423 JRT_END
424
425 JRT_ENTRY(void, InterpreterRuntime::read_flattened_field(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder))
426 Handle obj_h(THREAD, obj);
427
428 assert(oopDesc::is_oop(obj), "Sanity check");
429
430 assert(field_holder->is_instance_klass(), "Sanity check");
431 InstanceKlass* klass = InstanceKlass::cast(field_holder);
432
433 assert(klass->field_is_flattened(index), "Sanity check");
434
435 ValueKlass* field_vklass = ValueKlass::cast(klass->get_value_field_klass(index));
436 assert(field_vklass->is_initialized(), "Must be initialized at this point");
437
438 instanceOop res = NULL;
439 if (field_vklass->is_empty_value()) {
440 res = (instanceOop)field_vklass->default_value();
441 } else {
442 // allocate instance
443 res = field_vklass->allocate_instance(CHECK);
444 // copy value
445 field_vklass->value_store(((char*)(oopDesc*)obj_h()) + klass->field_offset(index),
446 field_vklass->data_for_oop(res), true, true);
447 }
448 assert(res != NULL, "Must be set in one of two paths above");
449 thread->set_vm_result(res);
450 JRT_END
451
452 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
453 oop obj = oopFactory::new_typeArray(type, size, CHECK);
454 thread->set_vm_result(obj);
455 JRT_END
456
457
458 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
459 Klass* klass = pool->klass_at(index, CHECK);
460 bool is_qtype_desc = pool->tag_at(index).is_Qdescriptor_klass();
461 arrayOop obj;
462 if ((!klass->is_array_klass()) && is_qtype_desc) { // Logically creates elements, ensure klass init
463 klass->initialize(CHECK);
464 obj = oopFactory::new_valueArray(klass, size, CHECK);
465 } else {
466 obj = oopFactory::new_objArray(klass, size, CHECK);
467 }
468 thread->set_vm_result(obj);
469 JRT_END
470
471 JRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
472 Klass* klass = array->klass();
473 assert(klass->is_valueArray_klass(), "expected value array oop");
474
475 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
476 ValueKlass* vklass = vaklass->element_klass();
477 arrayHandle ah(THREAD, array);
478 instanceOop value_holder = NULL;
479 if (vklass->is_empty_value()) {
480 value_holder = (instanceOop)vklass->default_value();
481 } else {
482 value_holder = vklass->allocate_instance(CHECK);
483 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper());
484 vklass->value_store(src, vklass->data_for_oop(value_holder),
485 vaklass->element_byte_size(), true, false);
486 }
487 assert(value_holder != NULL, "Must be set in one of two paths above");
488 thread->set_vm_result(value_holder);
489 JRT_END
490
491 JRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, void* val, arrayOopDesc* array, int index))
492 assert(val != NULL, "can't store null into flat array");
493 Klass* klass = array->klass();
494 assert(klass->is_valueArray_klass(), "expected value array");
495 assert(ArrayKlass::cast(klass)->element_klass() == ((oop)val)->klass(), "Store type incorrect");
496
497 valueArrayOop varray = (valueArrayOop)array;
498 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
499 ValueKlass* vklass = vaklass->element_klass();
500 if (!vklass->is_empty_value()) {
501 const int lh = vaklass->layout_helper();
502 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
503 vaklass->element_byte_size(), true, false);
504 }
505 JRT_END
506
507 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
508 // We may want to pass in more arguments - could make this slightly faster
509 LastFrameAccessor last_frame(thread);
510 ConstantPool* constants = last_frame.method()->constants();
511 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
512 Klass* klass = constants->klass_at(i, CHECK);
513 bool is_qtype = klass->name()->is_Q_array_signature();
514 int nof_dims = last_frame.number_of_dimensions();
515 assert(klass->is_klass(), "not a class");
516 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
517
518 if (is_qtype) { // Logically creates elements, ensure klass init
519 klass->initialize(CHECK);
520 }
521
522 // We must create an array of jints to pass to multi_allocate.
523 ResourceMark rm(thread);
524 const int small_dims = 10;
525 jint dim_array[small_dims];
526 jint *dims = &dim_array[0];
527 if (nof_dims > small_dims) {
528 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
529 }
530 for (int index = 0; index < nof_dims; index++) {
531 // offset from first_size_address is addressed as local[index]
532 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
533 dims[index] = first_size_address[n];
534 }
535 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
536 thread->set_vm_result(obj);
537 JRT_END
538
539
540 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
541 assert(oopDesc::is_oop(obj), "must be a valid oop");
542 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
543 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
544 JRT_END
545
546 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* thread, oopDesc* aobj, oopDesc* bobj))
547 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
548
549 Handle ha(THREAD, aobj);
550 Handle hb(THREAD, bobj);
551 JavaValue result(T_BOOLEAN);
552 JavaCallArguments args;
553 args.push_oop(ha);
554 args.push_oop(hb);
555 methodHandle method(Universe::is_substitutable_method());
556 JavaCalls::call(&result, method, &args, THREAD);
557 guarantee(!HAS_PENDING_EXCEPTION, "isSubstitutable() raised exception");
558 return result.get_jboolean();
559 JRT_END
560
561 // Quicken instance-of and check-cast bytecodes
562 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
563 // Force resolving; quicken the bytecode
564 LastFrameAccessor last_frame(thread);
565 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
566 ConstantPool* cpool = last_frame.method()->constants();
567 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
568 // program we might have seen an unquick'd bytecode in the interpreter but have another
569 // thread quicken the bytecode before we get here.
570 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
571 Klass* klass = cpool->klass_at(which, CHECK);
572 thread->set_vm_result_2(klass);
573 JRT_END
574
575
576 //------------------------------------------------------------------------------------------------------------------------
577 // Exceptions
578
579 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
580 const methodHandle& trap_method, int trap_bci, TRAPS) {
581 if (trap_method.not_null()) {
582 MethodData* trap_mdo = trap_method->method_data();
583 if (trap_mdo == NULL) {
584 Method::build_interpreter_method_data(trap_method, THREAD);
585 if (HAS_PENDING_EXCEPTION) {
586 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
587 "we expect only an OOM error here");
588 CLEAR_PENDING_EXCEPTION;
589 }
590 trap_mdo = trap_method->method_data();
591 // and fall through...
592 }
593 if (trap_mdo != NULL) {
594 // Update per-method count of trap events. The interpreter
595 // is updating the MDO to simulate the effect of compiler traps.
596 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
597 }
598 }
599 }
600
601 // Assume the compiler is (or will be) interested in this event.
602 // If necessary, create an MDO to hold the information, and record it.
603 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
604 assert(ProfileTraps, "call me only if profiling");
605 LastFrameAccessor last_frame(thread);
606 methodHandle trap_method(thread, last_frame.method());
607 int trap_bci = trap_method->bci_from(last_frame.bcp());
608 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
609 }
610
611 #ifdef CC_INTERP
612 // As legacy note_trap, but we have more arguments.
613 JRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
614 methodHandle trap_method(method);
615 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
616 JRT_END
617
618 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
619 // for each exception.
620 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
621 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
622 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
623 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
624 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
625 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
626 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
627 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
628 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
629 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
630 #endif // CC_INTERP
631
632
633 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
634 // get klass
635 InstanceKlass* klass = InstanceKlass::cast(k);
636 assert(klass->is_initialized(),
637 "this klass should have been initialized during VM initialization");
638 // create instance - do not call constructor since we may have no
639 // (java) stack space left (should assert constructor is empty)
640 Handle exception;
641 oop exception_oop = klass->allocate_instance(CHECK_(exception));
642 exception = Handle(THREAD, exception_oop);
643 if (StackTraceInThrowable) {
644 java_lang_Throwable::fill_in_stack_trace(exception);
645 }
646 return exception;
647 }
648
649 // Special handling for stack overflow: since we don't have any (java) stack
650 // space left we use the pre-allocated & pre-initialized StackOverflowError
651 // klass to create an stack overflow error instance. We do not call its
652 // constructor for the same reason (it is empty, anyway).
653 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
654 Handle exception = get_preinitialized_exception(
655 SystemDictionary::StackOverflowError_klass(),
656 CHECK);
657 // Increment counter for hs_err file reporting
658 Atomic::inc(&Exceptions::_stack_overflow_errors);
659 THROW_HANDLE(exception);
660 JRT_END
661
662 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
663 Handle exception = get_preinitialized_exception(
664 SystemDictionary::StackOverflowError_klass(),
665 CHECK);
666 java_lang_Throwable::set_message(exception(),
667 Universe::delayed_stack_overflow_error_message());
668 // Increment counter for hs_err file reporting
669 Atomic::inc(&Exceptions::_stack_overflow_errors);
670 THROW_HANDLE(exception);
671 JRT_END
672
673 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
674 // lookup exception klass
675 TempNewSymbol s = SymbolTable::new_symbol(name);
676 if (ProfileTraps) {
677 if (s == vmSymbols::java_lang_ArithmeticException()) {
678 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
679 } else if (s == vmSymbols::java_lang_NullPointerException()) {
680 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
681 }
682 }
683 // create exception
684 Handle exception = Exceptions::new_exception(thread, s, message);
685 thread->set_vm_result(exception());
686 JRT_END
687
688
689 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
690 // Produce the error message first because note_trap can safepoint
691 ResourceMark rm(thread);
692 const char* klass_name = obj->klass()->external_name();
693 // lookup exception klass
694 TempNewSymbol s = SymbolTable::new_symbol(name);
695 if (ProfileTraps) {
696 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
697 }
698 // create exception, with klass name as detail message
699 Handle exception = Exceptions::new_exception(thread, s, klass_name);
700 thread->set_vm_result(exception());
701 JRT_END
702
703 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, arrayOopDesc* a, jint index))
704 // Produce the error message first because note_trap can safepoint
705 ResourceMark rm(thread);
706 stringStream ss;
707 ss.print("Index %d out of bounds for length %d", index, a->length());
708
709 if (ProfileTraps) {
710 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
711 }
712
713 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
714 JRT_END
715
716 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
717 JavaThread* thread, oopDesc* obj))
718
719 // Produce the error message first because note_trap can safepoint
720 ResourceMark rm(thread);
721 char* message = SharedRuntime::generate_class_cast_message(
722 thread, obj->klass());
723
724 if (ProfileTraps) {
725 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
726 }
727
728 // create exception
729 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
730 JRT_END
731
732 // exception_handler_for_exception(...) returns the continuation address,
733 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
734 // The exception oop is returned to make sure it is preserved over GC (it
735 // is only on the stack if the exception was thrown explicitly via athrow).
736 // During this operation, the expression stack contains the values for the
737 // bci where the exception happened. If the exception was propagated back
738 // from a call, the expression stack contains the values for the bci at the
739 // invoke w/o arguments (i.e., as if one were inside the call).
740 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
741
742 LastFrameAccessor last_frame(thread);
743 Handle h_exception(thread, exception);
744 methodHandle h_method (thread, last_frame.method());
745 constantPoolHandle h_constants(thread, h_method->constants());
746 bool should_repeat;
747 int handler_bci;
748 int current_bci = last_frame.bci();
749
750 if (thread->frames_to_pop_failed_realloc() > 0) {
751 // Allocation of scalar replaced object used in this frame
752 // failed. Unconditionally pop the frame.
753 thread->dec_frames_to_pop_failed_realloc();
754 thread->set_vm_result(h_exception());
755 // If the method is synchronized we already unlocked the monitor
756 // during deoptimization so the interpreter needs to skip it when
757 // the frame is popped.
758 thread->set_do_not_unlock_if_synchronized(true);
759 #ifdef CC_INTERP
760 return (address) -1;
761 #else
762 return Interpreter::remove_activation_entry();
763 #endif
764 }
765
766 // Need to do this check first since when _do_not_unlock_if_synchronized
767 // is set, we don't want to trigger any classloading which may make calls
768 // into java, or surprisingly find a matching exception handler for bci 0
769 // since at this moment the method hasn't been "officially" entered yet.
770 if (thread->do_not_unlock_if_synchronized()) {
771 ResourceMark rm;
772 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
773 thread->set_vm_result(exception);
774 #ifdef CC_INTERP
775 return (address) -1;
776 #else
777 return Interpreter::remove_activation_entry();
778 #endif
779 }
780
781 do {
782 should_repeat = false;
783
784 // assertions
785 #ifdef ASSERT
786 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
787 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
788 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
789 if (ExitVMOnVerifyError) vm_exit(-1);
790 ShouldNotReachHere();
791 }
792 #endif
793
794 // tracing
795 if (log_is_enabled(Info, exceptions)) {
796 ResourceMark rm(thread);
797 stringStream tempst;
798 tempst.print("interpreter method <%s>\n"
799 " at bci %d for thread " INTPTR_FORMAT " (%s)",
800 h_method->print_value_string(), current_bci, p2i(thread), thread->name());
801 Exceptions::log_exception(h_exception, tempst.as_string());
802 }
803 // Don't go paging in something which won't be used.
804 // else if (extable->length() == 0) {
805 // // disabled for now - interpreter is not using shortcut yet
806 // // (shortcut is not to call runtime if we have no exception handlers)
807 // // warning("performance bug: should not call runtime if method has no exception handlers");
808 // }
809 // for AbortVMOnException flag
810 Exceptions::debug_check_abort(h_exception);
811
812 // exception handler lookup
813 Klass* klass = h_exception->klass();
814 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
815 if (HAS_PENDING_EXCEPTION) {
816 // We threw an exception while trying to find the exception handler.
817 // Transfer the new exception to the exception handle which will
818 // be set into thread local storage, and do another lookup for an
819 // exception handler for this exception, this time starting at the
820 // BCI of the exception handler which caused the exception to be
821 // thrown (bug 4307310).
822 h_exception = Handle(THREAD, PENDING_EXCEPTION);
823 CLEAR_PENDING_EXCEPTION;
824 if (handler_bci >= 0) {
825 current_bci = handler_bci;
826 should_repeat = true;
827 }
828 }
829 } while (should_repeat == true);
830
831 #if INCLUDE_JVMCI
832 if (EnableJVMCI && h_method->method_data() != NULL) {
833 ResourceMark rm(thread);
834 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
835 if (pdata != NULL && pdata->is_BitData()) {
836 BitData* bit_data = (BitData*) pdata;
837 bit_data->set_exception_seen();
838 }
839 }
840 #endif
841
842 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
843 // time throw or a stack unwinding throw and accordingly notify the debugger
844 if (JvmtiExport::can_post_on_exceptions()) {
845 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
846 }
847
848 #ifdef CC_INTERP
849 address continuation = (address)(intptr_t) handler_bci;
850 #else
851 address continuation = NULL;
852 #endif
853 address handler_pc = NULL;
854 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
855 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
856 // handler in this method, or (b) after a stack overflow there is not yet
857 // enough stack space available to reprotect the stack.
858 #ifndef CC_INTERP
859 continuation = Interpreter::remove_activation_entry();
860 #endif
861 #if COMPILER2_OR_JVMCI
862 // Count this for compilation purposes
863 h_method->interpreter_throwout_increment(THREAD);
864 #endif
865 } else {
866 // handler in this method => change bci/bcp to handler bci/bcp and continue there
867 handler_pc = h_method->code_base() + handler_bci;
868 #ifndef CC_INTERP
869 set_bcp_and_mdp(handler_pc, thread);
870 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
871 #endif
872 }
873 // notify debugger of an exception catch
874 // (this is good for exceptions caught in native methods as well)
875 if (JvmtiExport::can_post_on_exceptions()) {
876 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
877 }
878
879 thread->set_vm_result(h_exception());
880 return continuation;
881 JRT_END
882
883
884 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
885 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
886 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
887 JRT_END
888
889
890 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
891 THROW(vmSymbols::java_lang_AbstractMethodError());
892 JRT_END
893
894 // This method is called from the "abstract_entry" of the interpreter.
895 // At that point, the arguments have already been removed from the stack
896 // and therefore we don't have the receiver object at our fingertips. (Though,
897 // on some platforms the receiver still resides in a register...). Thus,
898 // we have no choice but print an error message not containing the receiver
899 // type.
900 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* thread,
901 Method* missingMethod))
902 ResourceMark rm(thread);
903 assert(missingMethod != NULL, "sanity");
904 methodHandle m(thread, missingMethod);
905 LinkResolver::throw_abstract_method_error(m, THREAD);
906 JRT_END
907
908 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* thread,
909 Klass* recvKlass,
910 Method* missingMethod))
911 ResourceMark rm(thread);
912 methodHandle mh = methodHandle(thread, missingMethod);
913 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
914 JRT_END
915
916
917 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
918 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
919 JRT_END
920
921 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* thread,
922 Klass* recvKlass,
923 Klass* interfaceKlass))
924 ResourceMark rm(thread);
925 char buf[1000];
926 buf[0] = '\0';
927 jio_snprintf(buf, sizeof(buf),
928 "Class %s does not implement the requested interface %s",
929 recvKlass ? recvKlass->external_name() : "NULL",
930 interfaceKlass ? interfaceKlass->external_name() : "NULL");
931 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
932 JRT_END
933
934 //------------------------------------------------------------------------------------------------------------------------
935 // Fields
936 //
937
938 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
939 Thread* THREAD = thread;
940 // resolve field
941 fieldDescriptor info;
942 LastFrameAccessor last_frame(thread);
943 constantPoolHandle pool(thread, last_frame.method()->constants());
944 methodHandle m(thread, last_frame.method());
945 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
946 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
947 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
948 bool is_value = bytecode == Bytecodes::_withfield;
949
950 {
951 JvmtiHideSingleStepping jhss(thread);
952 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
953 m, bytecode, CHECK);
954 } // end JvmtiHideSingleStepping
955
956 // check if link resolution caused cpCache to be updated
957 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
958 if (cp_cache_entry->is_resolved(bytecode)) return;
959
960 // compute auxiliary field attributes
961 TosState state = as_TosState(info.field_type());
962
963 // Resolution of put instructions on final fields is delayed. That is required so that
964 // exceptions are thrown at the correct place (when the instruction is actually invoked).
965 // If we do not resolve an instruction in the current pass, leaving the put_code
966 // set to zero will cause the next put instruction to the same field to reresolve.
967
968 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
969 // to final instance fields with updates originating from a method different than <init>)
970 // is inhibited. A putfield instruction targeting an instance final field must throw
971 // an IllegalAccessError if the instruction is not in an instance
972 // initializer method <init>. If resolution were not inhibited, a putfield
973 // in an initializer method could be resolved in the initializer. Subsequent
974 // putfield instructions to the same field would then use cached information.
975 // As a result, those instructions would not pass through the VM. That is,
976 // checks in resolve_field_access() would not be executed for those instructions
977 // and the required IllegalAccessError would not be thrown.
978 //
979 // Also, we need to delay resolving getstatic and putstatic instructions until the
980 // class is initialized. This is required so that access to the static
981 // field will call the initialization function every time until the class
982 // is completely initialized ala. in 2.17.5 in JVM Specification.
983 InstanceKlass* klass = info.field_holder();
984 bool uninitialized_static = is_static && !klass->is_initialized();
985 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
986 info.has_initialized_final_update();
987 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
988
989 Bytecodes::Code get_code = (Bytecodes::Code)0;
990 Bytecodes::Code put_code = (Bytecodes::Code)0;
991 if (!uninitialized_static) {
992 if (is_static) {
993 get_code = Bytecodes::_getstatic;
994 } else {
995 get_code = Bytecodes::_getfield;
996 }
997 if (is_put && is_value) {
998 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
999 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
1000 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
1001 }
1002 }
1003
1004 cp_cache_entry->set_field(
1005 get_code,
1006 put_code,
1007 info.field_holder(),
1008 info.index(),
1009 info.offset(),
1010 state,
1011 info.access_flags().is_final(),
1012 info.access_flags().is_volatile(),
1013 info.is_flattened(),
1014 info.is_flattenable(),
1015 pool->pool_holder()
1016 );
1017 }
1018
1019
1020 //------------------------------------------------------------------------------------------------------------------------
1021 // Synchronization
1022 //
1023 // The interpreter's synchronization code is factored out so that it can
1024 // be shared by method invocation and synchronized blocks.
1025 //%note synchronization_3
1026
1027 //%note monitor_1
1028 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
1029 #ifdef ASSERT
1030 thread->last_frame().interpreter_frame_verify_monitor(elem);
1031 #endif
1032 if (PrintBiasedLockingStatistics) {
1033 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
1034 }
1035 Handle h_obj(thread, elem->obj());
1036 assert(Universe::heap()->is_in_or_null(h_obj()),
1037 "must be NULL or an object");
1038 ObjectSynchronizer::enter(h_obj, elem->lock(), CHECK);
1039 assert(Universe::heap()->is_in_or_null(elem->obj()),
1040 "must be NULL or an object");
1041 #ifdef ASSERT
1042 thread->last_frame().interpreter_frame_verify_monitor(elem);
1043 #endif
1044 JRT_END
1045
1046
1047 //%note monitor_1
1048 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
1049 #ifdef ASSERT
1050 thread->last_frame().interpreter_frame_verify_monitor(elem);
1051 #endif
1052 Handle h_obj(thread, elem->obj());
1053 assert(Universe::heap()->is_in_or_null(h_obj()),
1054 "must be NULL or an object");
1055 if (elem == NULL || h_obj()->is_unlocked()) {
1056 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1057 }
1058 ObjectSynchronizer::exit(h_obj(), elem->lock(), thread);
1059 // Free entry. This must be done here, since a pending exception might be installed on
1060 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
1061 elem->set_obj(NULL);
1062 #ifdef ASSERT
1063 thread->last_frame().interpreter_frame_verify_monitor(elem);
1064 #endif
1065 JRT_END
1066
1067
1068 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
1069 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1070 JRT_END
1071
1072
1073 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
1074 // Returns an illegal exception to install into the current thread. The
1075 // pending_exception flag is cleared so normal exception handling does not
1076 // trigger. Any current installed exception will be overwritten. This
1077 // method will be called during an exception unwind.
1078
1079 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1080 Handle exception(thread, thread->vm_result());
1081 assert(exception() != NULL, "vm result should be set");
1082 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1083 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
1084 exception = get_preinitialized_exception(
1085 SystemDictionary::IllegalMonitorStateException_klass(),
1086 CATCH);
1087 }
1088 thread->set_vm_result(exception());
1089 JRT_END
1090
1091
1092 //------------------------------------------------------------------------------------------------------------------------
1093 // Invokes
1094
1095 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
1096 return method->orig_bytecode_at(method->bci_from(bcp));
1097 JRT_END
1098
1099 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
1100 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1101 JRT_END
1102
1103 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
1104 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
1105 JRT_END
1106
1107 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
1108 Thread* THREAD = thread;
1109 LastFrameAccessor last_frame(thread);
1110 // extract receiver from the outgoing argument list if necessary
1111 Handle receiver(thread, NULL);
1112 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1113 bytecode == Bytecodes::_invokespecial) {
1114 ResourceMark rm(thread);
1115 methodHandle m (thread, last_frame.method());
1116 Bytecode_invoke call(m, last_frame.bci());
1117 Symbol* signature = call.signature();
1118 receiver = Handle(thread, last_frame.callee_receiver(signature));
1119
1120 assert(Universe::heap()->is_in_or_null(receiver()),
1121 "sanity check");
1122 assert(receiver.is_null() ||
1123 !Universe::heap()->is_in(receiver->klass()),
1124 "sanity check");
1125 }
1126
1127 // resolve method
1128 CallInfo info;
1129 constantPoolHandle pool(thread, last_frame.method()->constants());
1130
1131 {
1132 JvmtiHideSingleStepping jhss(thread);
1133 LinkResolver::resolve_invoke(info, receiver, pool,
1134 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1135 CHECK);
1136 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
1137 int retry_count = 0;
1138 while (info.resolved_method()->is_old()) {
1139 // It is very unlikely that method is redefined more than 100 times
1140 // in the middle of resolve. If it is looping here more than 100 times
1141 // means then there could be a bug here.
1142 guarantee((retry_count++ < 100),
1143 "Could not resolve to latest version of redefined method");
1144 // method is redefined in the middle of resolve so re-try.
1145 LinkResolver::resolve_invoke(info, receiver, pool,
1146 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1147 CHECK);
1148 }
1149 }
1150 } // end JvmtiHideSingleStepping
1151
1152 // check if link resolution caused cpCache to be updated
1153 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1154 if (cp_cache_entry->is_resolved(bytecode)) return;
1155
1156 #ifdef ASSERT
1157 if (bytecode == Bytecodes::_invokeinterface) {
1158 if (info.resolved_method()->method_holder() ==
1159 SystemDictionary::Object_klass()) {
1160 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1161 // (see also CallInfo::set_interface for details)
1162 assert(info.call_kind() == CallInfo::vtable_call ||
1163 info.call_kind() == CallInfo::direct_call, "");
1164 methodHandle rm = info.resolved_method();
1165 assert(rm->is_final() || info.has_vtable_index(),
1166 "should have been set already");
1167 } else if (!info.resolved_method()->has_itable_index()) {
1168 // Resolved something like CharSequence.toString. Use vtable not itable.
1169 assert(info.call_kind() != CallInfo::itable_call, "");
1170 } else {
1171 // Setup itable entry
1172 assert(info.call_kind() == CallInfo::itable_call, "");
1173 int index = info.resolved_method()->itable_index();
1174 assert(info.itable_index() == index, "");
1175 }
1176 } else if (bytecode == Bytecodes::_invokespecial) {
1177 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1178 } else {
1179 assert(info.call_kind() == CallInfo::direct_call ||
1180 info.call_kind() == CallInfo::vtable_call, "");
1181 }
1182 #endif
1183 // Get sender or sender's unsafe_anonymous_host, and only set cpCache entry to resolved if
1184 // it is not an interface. The receiver for invokespecial calls within interface
1185 // methods must be checked for every call.
1186 InstanceKlass* sender = pool->pool_holder();
1187 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
1188
1189 switch (info.call_kind()) {
1190 case CallInfo::direct_call:
1191 cp_cache_entry->set_direct_call(
1192 bytecode,
1193 info.resolved_method(),
1194 sender->is_interface());
1195 break;
1196 case CallInfo::vtable_call:
1197 cp_cache_entry->set_vtable_call(
1198 bytecode,
1199 info.resolved_method(),
1200 info.vtable_index());
1201 break;
1202 case CallInfo::itable_call:
1203 cp_cache_entry->set_itable_call(
1204 bytecode,
1205 info.resolved_klass(),
1206 info.resolved_method(),
1207 info.itable_index());
1208 break;
1209 default: ShouldNotReachHere();
1210 }
1211 }
1212
1213
1214 // First time execution: Resolve symbols, create a permanent MethodType object.
1215 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1216 Thread* THREAD = thread;
1217 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1218 LastFrameAccessor last_frame(thread);
1219
1220 // resolve method
1221 CallInfo info;
1222 constantPoolHandle pool(thread, last_frame.method()->constants());
1223 {
1224 JvmtiHideSingleStepping jhss(thread);
1225 LinkResolver::resolve_invoke(info, Handle(), pool,
1226 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1227 CHECK);
1228 } // end JvmtiHideSingleStepping
1229
1230 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1231 cp_cache_entry->set_method_handle(pool, info);
1232 }
1233
1234 // First time execution: Resolve symbols, create a permanent CallSite object.
1235 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1236 Thread* THREAD = thread;
1237 LastFrameAccessor last_frame(thread);
1238 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1239
1240 // resolve method
1241 CallInfo info;
1242 constantPoolHandle pool(thread, last_frame.method()->constants());
1243 int index = last_frame.get_index_u4(bytecode);
1244 {
1245 JvmtiHideSingleStepping jhss(thread);
1246 LinkResolver::resolve_invoke(info, Handle(), pool,
1247 index, bytecode, CHECK);
1248 } // end JvmtiHideSingleStepping
1249
1250 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1251 cp_cache_entry->set_dynamic_call(pool, info);
1252 }
1253
1254 // This function is the interface to the assembly code. It returns the resolved
1255 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1256 // This function will check for redefinition!
1257 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1258 switch (bytecode) {
1259 case Bytecodes::_getstatic:
1260 case Bytecodes::_putstatic:
1261 case Bytecodes::_getfield:
1262 case Bytecodes::_putfield:
1263 case Bytecodes::_withfield:
1264 resolve_get_put(thread, bytecode);
1265 break;
1266 case Bytecodes::_invokevirtual:
1267 case Bytecodes::_invokespecial:
1268 case Bytecodes::_invokestatic:
1269 case Bytecodes::_invokeinterface:
1270 resolve_invoke(thread, bytecode);
1271 break;
1272 case Bytecodes::_invokehandle:
1273 resolve_invokehandle(thread);
1274 break;
1275 case Bytecodes::_invokedynamic:
1276 resolve_invokedynamic(thread);
1277 break;
1278 default:
1279 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1280 break;
1281 }
1282 }
1283 JRT_END
1284
1285 //------------------------------------------------------------------------------------------------------------------------
1286 // Miscellaneous
1287
1288
1289 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1290 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1291 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1292 if (branch_bcp != NULL && nm != NULL) {
1293 // This was a successful request for an OSR nmethod. Because
1294 // frequency_counter_overflow_inner ends with a safepoint check,
1295 // nm could have been unloaded so look it up again. It's unsafe
1296 // to examine nm directly since it might have been freed and used
1297 // for something else.
1298 LastFrameAccessor last_frame(thread);
1299 Method* method = last_frame.method();
1300 int bci = method->bci_from(last_frame.bcp());
1301 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1302 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1303 if (nm != NULL && bs_nm != NULL) {
1304 // in case the transition passed a safepoint we need to barrier this again
1305 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1306 nm = NULL;
1307 }
1308 }
1309 }
1310 if (nm != NULL && thread->is_interp_only_mode()) {
1311 // Normally we never get an nm if is_interp_only_mode() is true, because
1312 // policy()->event has a check for this and won't compile the method when
1313 // true. However, it's possible for is_interp_only_mode() to become true
1314 // during the compilation. We don't want to return the nm in that case
1315 // because we want to continue to execute interpreted.
1316 nm = NULL;
1317 }
1318 #ifndef PRODUCT
1319 if (TraceOnStackReplacement) {
1320 if (nm != NULL) {
1321 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1322 nm->print();
1323 }
1324 }
1325 #endif
1326 return nm;
1327 }
1328
1329 JRT_ENTRY(nmethod*,
1330 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1331 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1332 // flag, in case this method triggers classloading which will call into Java.
1333 UnlockFlagSaver fs(thread);
1334
1335 LastFrameAccessor last_frame(thread);
1336 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1337 methodHandle method(thread, last_frame.method());
1338 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1339 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1340
1341 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1342 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1343 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1344
1345 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1346 if (osr_nm != NULL && bs_nm != NULL) {
1347 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1348 osr_nm = NULL;
1349 }
1350 }
1351
1352 if (osr_nm != NULL) {
1353 // We may need to do on-stack replacement which requires that no
1354 // monitors in the activation are biased because their
1355 // BasicObjectLocks will need to migrate during OSR. Force
1356 // unbiasing of all monitors in the activation now (even though
1357 // the OSR nmethod might be invalidated) because we don't have a
1358 // safepoint opportunity later once the migration begins.
1359 if (UseBiasedLocking) {
1360 ResourceMark rm;
1361 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1362 for( BasicObjectLock *kptr = last_frame.monitor_end();
1363 kptr < last_frame.monitor_begin();
1364 kptr = last_frame.next_monitor(kptr) ) {
1365 if( kptr->obj() != NULL ) {
1366 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1367 }
1368 }
1369 BiasedLocking::revoke(objects_to_revoke, thread);
1370 }
1371 }
1372 return osr_nm;
1373 JRT_END
1374
1375 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1376 assert(ProfileInterpreter, "must be profiling interpreter");
1377 int bci = method->bci_from(cur_bcp);
1378 MethodData* mdo = method->method_data();
1379 if (mdo == NULL) return 0;
1380 return mdo->bci_to_di(bci);
1381 JRT_END
1382
1383 JRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1384 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1385 // flag, in case this method triggers classloading which will call into Java.
1386 UnlockFlagSaver fs(thread);
1387
1388 assert(ProfileInterpreter, "must be profiling interpreter");
1389 LastFrameAccessor last_frame(thread);
1390 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1391 methodHandle method(thread, last_frame.method());
1392 Method::build_interpreter_method_data(method, THREAD);
1393 if (HAS_PENDING_EXCEPTION) {
1394 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1395 CLEAR_PENDING_EXCEPTION;
1396 // and fall through...
1397 }
1398 JRT_END
1399
1400
1401 #ifdef ASSERT
1402 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1403 assert(ProfileInterpreter, "must be profiling interpreter");
1404
1405 MethodData* mdo = method->method_data();
1406 assert(mdo != NULL, "must not be null");
1407
1408 int bci = method->bci_from(bcp);
1409
1410 address mdp2 = mdo->bci_to_dp(bci);
1411 if (mdp != mdp2) {
1412 ResourceMark rm;
1413 ResetNoHandleMark rnm; // In a LEAF entry.
1414 HandleMark hm;
1415 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1416 int current_di = mdo->dp_to_di(mdp);
1417 int expected_di = mdo->dp_to_di(mdp2);
1418 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1419 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1420 int approx_bci = -1;
1421 if (current_di >= 0) {
1422 approx_bci = mdo->data_at(current_di)->bci();
1423 }
1424 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1425 mdo->print_on(tty);
1426 method->print_codes();
1427 }
1428 assert(mdp == mdp2, "wrong mdp");
1429 JRT_END
1430 #endif // ASSERT
1431
1432 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1433 assert(ProfileInterpreter, "must be profiling interpreter");
1434 ResourceMark rm(thread);
1435 HandleMark hm(thread);
1436 LastFrameAccessor last_frame(thread);
1437 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1438 MethodData* h_mdo = last_frame.method()->method_data();
1439
1440 // Grab a lock to ensure atomic access to setting the return bci and
1441 // the displacement. This can block and GC, invalidating all naked oops.
1442 MutexLocker ml(RetData_lock);
1443
1444 // ProfileData is essentially a wrapper around a derived oop, so we
1445 // need to take the lock before making any ProfileData structures.
1446 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1447 guarantee(data != NULL, "profile data must be valid");
1448 RetData* rdata = data->as_RetData();
1449 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1450 last_frame.set_mdp(new_mdp);
1451 JRT_END
1452
1453 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1454 MethodCounters* mcs = Method::build_method_counters(m, thread);
1455 if (HAS_PENDING_EXCEPTION) {
1456 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1457 CLEAR_PENDING_EXCEPTION;
1458 }
1459 return mcs;
1460 JRT_END
1461
1462
1463 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1464 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1465 // stack traversal automatically takes care of preserving arguments for invoke, so
1466 // this is no longer needed.
1467
1468 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1469 // if this is called during a safepoint
1470
1471 if (JvmtiExport::should_post_single_step()) {
1472 // We are called during regular safepoints and when the VM is
1473 // single stepping. If any thread is marked for single stepping,
1474 // then we may have JVMTI work to do.
1475 LastFrameAccessor last_frame(thread);
1476 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1477 }
1478 JRT_END
1479
1480 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1481 ConstantPoolCacheEntry *cp_entry))
1482
1483 // check the access_flags for the field in the klass
1484
1485 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1486 int index = cp_entry->field_index();
1487 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1488
1489 bool is_static = (obj == NULL);
1490 HandleMark hm(thread);
1491
1492 Handle h_obj;
1493 if (!is_static) {
1494 // non-static field accessors have an object, but we need a handle
1495 h_obj = Handle(thread, obj);
1496 }
1497 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1498 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1499 LastFrameAccessor last_frame(thread);
1500 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1501 JRT_END
1502
1503 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1504 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1505
1506 Klass* k = cp_entry->f1_as_klass();
1507
1508 // check the access_flags for the field in the klass
1509 InstanceKlass* ik = InstanceKlass::cast(k);
1510 int index = cp_entry->field_index();
1511 // bail out if field modifications are not watched
1512 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1513
1514 char sig_type = '\0';
1515
1516 switch(cp_entry->flag_state()) {
1517 case btos: sig_type = 'B'; break;
1518 case ztos: sig_type = 'Z'; break;
1519 case ctos: sig_type = 'C'; break;
1520 case stos: sig_type = 'S'; break;
1521 case itos: sig_type = 'I'; break;
1522 case ftos: sig_type = 'F'; break;
1523 case atos: sig_type = 'L'; break;
1524 case ltos: sig_type = 'J'; break;
1525 case dtos: sig_type = 'D'; break;
1526 default: ShouldNotReachHere(); return;
1527 }
1528
1529 // Both Q-signatures and L-signatures are mapped to atos
1530 if (cp_entry->flag_state() == atos && ik->field_signature(index)->is_Q_signature()) {
1531 sig_type = 'Q';
1532 }
1533
1534 bool is_static = (obj == NULL);
1535
1536 HandleMark hm(thread);
1537 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1538 jvalue fvalue;
1539 #ifdef _LP64
1540 fvalue = *value;
1541 #else
1542 // Long/double values are stored unaligned and also noncontiguously with
1543 // tagged stacks. We can't just do a simple assignment even in the non-
1544 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1545 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1546 // We assume that the two halves of longs/doubles are stored in interpreter
1547 // stack slots in platform-endian order.
1548 jlong_accessor u;
1549 jint* newval = (jint*)value;
1550 u.words[0] = newval[0];
1551 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1552 fvalue.j = u.long_value;
1553 #endif // _LP64
1554
1555 Handle h_obj;
1556 if (!is_static) {
1557 // non-static field accessors have an object, but we need a handle
1558 h_obj = Handle(thread, obj);
1559 }
1560
1561 LastFrameAccessor last_frame(thread);
1562 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1563 fid, sig_type, &fvalue);
1564 JRT_END
1565
1566 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1567 LastFrameAccessor last_frame(thread);
1568 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1569 JRT_END
1570
1571
1572 JRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1573 LastFrameAccessor last_frame(thread);
1574 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1575 JRT_END
1576
1577 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1578 {
1579 return (Interpreter::contains(pc) ? 1 : 0);
1580 }
1581 JRT_END
1582
1583
1584 // Implementation of SignatureHandlerLibrary
1585
1586 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1587 // Dummy definition (else normalization method is defined in CPU
1588 // dependant code)
1589 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1590 return fingerprint;
1591 }
1592 #endif
1593
1594 address SignatureHandlerLibrary::set_handler_blob() {
1595 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1596 if (handler_blob == NULL) {
1597 return NULL;
1598 }
1599 address handler = handler_blob->code_begin();
1600 _handler_blob = handler_blob;
1601 _handler = handler;
1602 return handler;
1603 }
1604
1605 void SignatureHandlerLibrary::initialize() {
1606 if (_fingerprints != NULL) {
1607 return;
1608 }
1609 if (set_handler_blob() == NULL) {
1610 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1611 }
1612
1613 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1614 SignatureHandlerLibrary::buffer_size);
1615 _buffer = bb->code_begin();
1616
1617 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1618 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1619 }
1620
1621 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1622 address handler = _handler;
1623 int insts_size = buffer->pure_insts_size();
1624 if (handler + insts_size > _handler_blob->code_end()) {
1625 // get a new handler blob
1626 handler = set_handler_blob();
1627 }
1628 if (handler != NULL) {
1629 memcpy(handler, buffer->insts_begin(), insts_size);
1630 pd_set_handler(handler);
1631 ICache::invalidate_range(handler, insts_size);
1632 _handler = handler + insts_size;
1633 }
1634 return handler;
1635 }
1636
1637 void SignatureHandlerLibrary::add(const methodHandle& method) {
1638 if (method->signature_handler() == NULL) {
1639 // use slow signature handler if we can't do better
1640 int handler_index = -1;
1641 // check if we can use customized (fast) signature handler
1642 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1643 // use customized signature handler
1644 MutexLocker mu(SignatureHandlerLibrary_lock);
1645 // make sure data structure is initialized
1646 initialize();
1647 // lookup method signature's fingerprint
1648 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1649 // allow CPU dependant code to optimize the fingerprints for the fast handler
1650 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1651 handler_index = _fingerprints->find(fingerprint);
1652 // create handler if necessary
1653 if (handler_index < 0) {
1654 ResourceMark rm;
1655 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1656 CodeBuffer buffer((address)(_buffer + align_offset),
1657 SignatureHandlerLibrary::buffer_size - align_offset);
1658 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1659 // copy into code heap
1660 address handler = set_handler(&buffer);
1661 if (handler == NULL) {
1662 // use slow signature handler (without memorizing it in the fingerprints)
1663 } else {
1664 // debugging suppport
1665 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1666 ttyLocker ttyl;
1667 tty->cr();
1668 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1669 _handlers->length(),
1670 (method->is_static() ? "static" : "receiver"),
1671 method->name_and_sig_as_C_string(),
1672 fingerprint,
1673 buffer.insts_size());
1674 if (buffer.insts_size() > 0) {
1675 Disassembler::decode(handler, handler + buffer.insts_size());
1676 }
1677 #ifndef PRODUCT
1678 address rh_begin = Interpreter::result_handler(method()->result_type());
1679 if (CodeCache::contains(rh_begin)) {
1680 // else it might be special platform dependent values
1681 tty->print_cr(" --- associated result handler ---");
1682 address rh_end = rh_begin;
1683 while (*(int*)rh_end != 0) {
1684 rh_end += sizeof(int);
1685 }
1686 Disassembler::decode(rh_begin, rh_end);
1687 } else {
1688 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1689 }
1690 #endif
1691 }
1692 // add handler to library
1693 _fingerprints->append(fingerprint);
1694 _handlers->append(handler);
1695 // set handler index
1696 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1697 handler_index = _fingerprints->length() - 1;
1698 }
1699 }
1700 // Set handler under SignatureHandlerLibrary_lock
1701 if (handler_index < 0) {
1702 // use generic signature handler
1703 method->set_signature_handler(Interpreter::slow_signature_handler());
1704 } else {
1705 // set handler
1706 method->set_signature_handler(_handlers->at(handler_index));
1707 }
1708 } else {
1709 DEBUG_ONLY(Thread::current()->check_possible_safepoint());
1710 // use generic signature handler
1711 method->set_signature_handler(Interpreter::slow_signature_handler());
1712 }
1713 }
1714 #ifdef ASSERT
1715 int handler_index = -1;
1716 int fingerprint_index = -2;
1717 {
1718 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1719 // in any way if accessed from multiple threads. To avoid races with another
1720 // thread which may change the arrays in the above, mutex protected block, we
1721 // have to protect this read access here with the same mutex as well!
1722 MutexLocker mu(SignatureHandlerLibrary_lock);
1723 if (_handlers != NULL) {
1724 handler_index = _handlers->find(method->signature_handler());
1725 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1726 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1727 fingerprint_index = _fingerprints->find(fingerprint);
1728 }
1729 }
1730 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1731 handler_index == fingerprint_index, "sanity check");
1732 #endif // ASSERT
1733 }
1734
1735 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1736 int handler_index = -1;
1737 // use customized signature handler
1738 MutexLocker mu(SignatureHandlerLibrary_lock);
1739 // make sure data structure is initialized
1740 initialize();
1741 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1742 handler_index = _fingerprints->find(fingerprint);
1743 // create handler if necessary
1744 if (handler_index < 0) {
1745 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1746 tty->cr();
1747 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1748 _handlers->length(),
1749 p2i(handler),
1750 fingerprint);
1751 }
1752 _fingerprints->append(fingerprint);
1753 _handlers->append(handler);
1754 } else {
1755 if (PrintSignatureHandlers) {
1756 tty->cr();
1757 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1758 _handlers->length(),
1759 fingerprint,
1760 p2i(_handlers->at(handler_index)),
1761 p2i(handler));
1762 }
1763 }
1764 }
1765
1766
1767 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1768 address SignatureHandlerLibrary::_handler = NULL;
1769 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1770 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1771 address SignatureHandlerLibrary::_buffer = NULL;
1772
1773
1774 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1775 methodHandle m(thread, method);
1776 assert(m->is_native(), "sanity check");
1777 // lookup native function entry point if it doesn't exist
1778 bool in_base_library;
1779 if (!m->has_native_function()) {
1780 NativeLookup::lookup(m, in_base_library, CHECK);
1781 }
1782 // make sure signature handler is installed
1783 SignatureHandlerLibrary::add(m);
1784 // The interpreter entry point checks the signature handler first,
1785 // before trying to fetch the native entry point and klass mirror.
1786 // We must set the signature handler last, so that multiple processors
1787 // preparing the same method will be sure to see non-null entry & mirror.
1788 JRT_END
1789
1790 #if defined(IA32) || defined(AMD64) || defined(ARM)
1791 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1792 if (src_address == dest_address) {
1793 return;
1794 }
1795 ResetNoHandleMark rnm; // In a LEAF entry.
1796 HandleMark hm;
1797 ResourceMark rm;
1798 LastFrameAccessor last_frame(thread);
1799 assert(last_frame.is_interpreted_frame(), "");
1800 jint bci = last_frame.bci();
1801 methodHandle mh(thread, last_frame.method());
1802 Bytecode_invoke invoke(mh, bci);
1803 ArgumentSizeComputer asc(invoke.signature());
1804 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1805 Copy::conjoint_jbytes(src_address, dest_address,
1806 size_of_arguments * Interpreter::stackElementSize);
1807 JRT_END
1808 #endif
1809
1810 #if INCLUDE_JVMTI
1811 // This is a support of the JVMTI PopFrame interface.
1812 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1813 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1814 // The member_name argument is a saved reference (in local#0) to the member_name.
1815 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1816 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1817 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1818 Method* method, address bcp))
1819 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1820 if (code != Bytecodes::_invokestatic) {
1821 return;
1822 }
1823 ConstantPool* cpool = method->constants();
1824 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1825 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1826 Symbol* mname = cpool->name_ref_at(cp_index);
1827
1828 if (MethodHandles::has_member_arg(cname, mname)) {
1829 oop member_name_oop = (oop) member_name;
1830 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1831 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1832 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1833 }
1834 thread->set_vm_result(member_name_oop);
1835 } else {
1836 thread->set_vm_result(NULL);
1837 }
1838 JRT_END
1839 #endif // INCLUDE_JVMTI
1840
1841 #ifndef PRODUCT
1842 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1843 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1844 // The generated code still uses call_VM because that will set up the frame pointer for
1845 // bcp and method.
1846 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1847 LastFrameAccessor last_frame(thread);
1848 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1849 methodHandle mh(thread, last_frame.method());
1850 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1851 return preserve_this_value;
1852 JRT_END
1853 #endif // !PRODUCT