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