1 /*
2 * Copyright (c) 1997, 2017, 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/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/disassembler.hpp"
32 #include "gc/shared/collectedHeap.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "interpreter/interpreterRuntime.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "interpreter/templateTable.hpp"
37 #include "logging/log.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "memory/vtBuffer.hpp"
42 #include "oops/constantPool.hpp"
43 #include "oops/instanceKlass.hpp"
44 #include "oops/methodData.hpp"
45 #include "oops/objArrayKlass.hpp"
46 #include "oops/objArrayOop.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/symbol.hpp"
49 #include "oops/valueKlass.hpp"
50 #include "oops/valueArrayKlass.hpp"
51 #include "oops/valueArrayOop.hpp"
52 #include "prims/jvmtiExport.hpp"
53 #include "prims/nativeLookup.hpp"
54 #include "runtime/atomic.hpp"
55 #include "runtime/biasedLocking.hpp"
56 #include "runtime/compilationPolicy.hpp"
57 #include "runtime/deoptimization.hpp"
58 #include "runtime/fieldDescriptor.hpp"
59 #include "runtime/handles.inline.hpp"
60 #include "runtime/icache.hpp"
61 #include "runtime/interfaceSupport.hpp"
62 #include "runtime/java.hpp"
63 #include "runtime/jfieldIDWorkaround.hpp"
64 #include "runtime/osThread.hpp"
65 #include "runtime/sharedRuntime.hpp"
66 #include "runtime/stubRoutines.hpp"
67 #include "runtime/synchronizer.hpp"
68 #include "runtime/threadCritical.hpp"
69 #include "utilities/align.hpp"
70 #include "utilities/events.hpp"
71 #include "utilities/globalDefinitions.hpp"
72 #ifdef COMPILER2
73 #include "opto/runtime.hpp"
74 #endif
75
76 class UnlockFlagSaver {
77 private:
78 JavaThread* _thread;
79 bool _do_not_unlock;
80 public:
81 UnlockFlagSaver(JavaThread* t) {
82 _thread = t;
83 _do_not_unlock = t->do_not_unlock_if_synchronized();
84 t->set_do_not_unlock_if_synchronized(false);
85 }
86 ~UnlockFlagSaver() {
87 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
88 }
89 };
90
91 //------------------------------------------------------------------------------------------------------------------------
92 // State accessors
93
94 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
95 last_frame(thread).interpreter_frame_set_bcp(bcp);
96 if (ProfileInterpreter) {
97 // ProfileTraps uses MDOs independently of ProfileInterpreter.
98 // That is why we must check both ProfileInterpreter and mdo != NULL.
99 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
100 if (mdo != NULL) {
101 NEEDS_CLEANUP;
102 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
103 }
104 }
105 }
106
107 //------------------------------------------------------------------------------------------------------------------------
108 // Constants
109
110
111 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
112 // access constant pool
113 ConstantPool* pool = method(thread)->constants();
114 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
115 constantTag tag = pool->tag_at(index);
116
117 assert ((tag.is_unresolved_klass() || tag.is_klass() ||
118 tag.is_unresolved_value_type() || tag.is_value_type()),
119 "wrong ldc call");
120 Klass* klass = pool->klass_at(index, CHECK);
121 oop java_class = klass->java_mirror();
122 thread->set_vm_result(java_class);
123 IRT_END
124
125 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
126 assert(bytecode == Bytecodes::_fast_aldc ||
127 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
128 ResourceMark rm(thread);
129 methodHandle m (thread, method(thread));
130 Bytecode_loadconstant ldc(m, bci(thread));
131 oop result = ldc.resolve_constant(CHECK);
132 #ifdef ASSERT
133 {
134 // The bytecode wrappers aren't GC-safe so construct a new one
135 Bytecode_loadconstant ldc2(m, bci(thread));
136 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
137 assert(result == coop, "expected result for assembly code");
138 }
139 #endif
140 thread->set_vm_result(result);
141 }
142 IRT_END
143
144
145 //------------------------------------------------------------------------------------------------------------------------
146 // Allocation
147
148 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
149 Klass* k = pool->klass_at(index, CHECK);
150 InstanceKlass* klass = InstanceKlass::cast(k);
151
152 // Make sure we are not instantiating an abstract klass
153 klass->check_valid_for_instantiation(true, CHECK);
154
155 // Make sure klass is initialized
156 klass->initialize(CHECK);
157
158 // At this point the class may not be fully initialized
159 // because of recursive initialization. If it is fully
160 // initialized & has_finalized is not set, we rewrite
161 // it into its fast version (Note: no locking is needed
162 // here since this is an atomic byte write and can be
163 // done more than once).
164 //
165 // Note: In case of classes with has_finalized we don't
166 // rewrite since that saves us an extra check in
167 // the fast version which then would call the
168 // slow version anyway (and do a call back into
169 // Java).
170 // If we have a breakpoint, then we don't rewrite
171 // because the _breakpoint bytecode would be lost.
172 oop obj = klass->allocate_instance(CHECK);
173 thread->set_vm_result(obj);
174 IRT_END
175
176 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) {
177 switch (type) {
178 case T_BOOLEAN:
179 instance()->bool_field_put(offset, (jboolean)*((int*)addr));
180 break;
181 case T_CHAR:
182 instance()->char_field_put(offset, (jchar) *((int*)addr));
183 break;
184 case T_FLOAT:
185 instance()->float_field_put(offset, (jfloat)*((float*)addr));
186 break;
187 case T_DOUBLE:
188 instance()->double_field_put(offset, (jdouble)*((double*)addr));
189 break;
190 case T_BYTE:
191 instance()->byte_field_put(offset, (jbyte)*((int*)addr));
192 break;
193 case T_SHORT:
194 instance()->short_field_put(offset, (jshort)*((int*)addr));
195 break;
196 case T_INT:
197 instance()->int_field_put(offset, (jint)*((int*)addr));
198 break;
199 case T_LONG:
200 instance()->long_field_put(offset, (jlong)*((long long*)addr));
201 break;
202 case T_OBJECT:
203 case T_ARRAY:
204 case T_VALUETYPE:
205 fatal("Should not be handled with this method");
206 break;
207 default:
208 fatal("Unsupported BasicType");
209 }
210 }
211
212 IRT_ENTRY(void, InterpreterRuntime::vdefault(JavaThread* thread, ConstantPool* pool, int index))
213 // Getting the ValueKlass
214 Klass* k = pool->klass_at(index, CHECK);
215 assert(k->is_value(), "vdefault argument must be the value type class");
216 ValueKlass* vklass = ValueKlass::cast(k);
217
218 vklass->initialize(THREAD);
219
220 // Creating value
221 bool in_heap;
222 instanceOop value = vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
223 Handle value_h = Handle(THREAD, value);
224
225 thread->set_vm_result(value_h());
226 IRT_END
227
228 IRT_ENTRY(int, InterpreterRuntime::vwithfield(JavaThread* thread, ConstantPoolCache* cp_cache))
229 // Getting the ValueKlass
230 int index = ConstantPool::decode_cpcache_index(get_index_u2_cpcache(thread, Bytecodes::_vwithfield));
231 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
232 assert(cp_entry->is_resolved(Bytecodes::_vwithfield), "Should have been resolved");
233 Klass* klass = cp_entry->f1_as_klass();
234 assert(klass->is_value(), "vwithfield only applies to value types");
235 ValueKlass* vklass = ValueKlass::cast(klass);
236
237 // Getting Field information
238 int offset = cp_entry->f2_as_index();
239 int field_index = cp_entry->field_index();
240 int field_offset = cp_entry->f2_as_offset();
241 Symbol* field_signature = vklass->field_signature(field_index);
242 ResourceMark rm(THREAD);
243 const char* signature = (const char *) field_signature->as_utf8();
244 BasicType field_type = char2type(signature[0]);
245
246 // Getting old value
247 frame f = last_frame(thread);
248 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1;
249 int vt_offset = type2size[field_type];
250 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset);
251 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver");
252 Handle old_value_h(THREAD, old_value);
253
254 // Creating new value by copying the one passed in argument
255 bool in_heap;
256 instanceOop new_value = vklass->allocate_buffered_or_heap_instance(&in_heap,
257 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
258 Handle new_value_h = Handle(THREAD, new_value);
259 int first_offset = vklass->first_field_offset();
260 vklass->value_store(vklass->data_for_oop(old_value_h()),
261 vklass->data_for_oop(new_value_h()), in_heap, false);
262
263 // Updating the field specified in arguments
264 if (field_type == T_OBJECT || field_type == T_ARRAY) {
265 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
266 assert(aoop == NULL || (oopDesc::is_oop(aoop) && (!aoop->is_value())),"argument must be a reference type");
267 new_value_h()->obj_field_put(field_offset, aoop);
268 } else if (field_type == T_VALUETYPE) {
269 if (cp_entry->is_flatten()) {
270 Klass* field_k = vklass->get_value_field_klass(field_index);
271 ValueKlass* field_vk = ValueKlass::cast(field_k);
272 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
273 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type");
274 assert(field_vk == vt_oop->klass(), "Must match");
275 field_vk->value_store(field_vk->data_for_oop(vt_oop),
276 ((char*)(oopDesc*)new_value_h()) + field_offset, true, false);
277 } else {
278 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
279 assert(voop != NULL || (oopDesc::is_oop(voop) && (voop->is_value())),"argument must be a value type");
280 new_value_h()->obj_field_put(field_offset, voop);
281 }
282 } else {
283 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx);
284 copy_primitive_argument(addr, new_value_h, field_offset, field_type);
285 }
286
287 // returning result
288 thread->set_vm_result(new_value_h());
289 return (type2size[field_type] + type2size[T_VALUETYPE]) * AbstractInterpreter::stackElementSize;
290 IRT_END
291
292 IRT_ENTRY(void, InterpreterRuntime::vbox(JavaThread* thread, ConstantPool* pool, int index, oopDesc* value))
293 assert(EnableMVT, "vbox is supported only when the MVT programming model is enabled");
294 if (value == NULL) {
295 THROW(vmSymbols::java_lang_NullPointerException());
296 }
297
298 // Since the verifier is probably disabled, a few extra type check
299 Klass* target_klass = pool->klass_at(index, CHECK);
300 if (target_klass->is_value()) {
301 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vbox target is value type");
302 }
303 Klass* klass = value->klass();
304 if (!klass->is_value()) {
305 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vbox not from value type");
306 }
307 ValueKlass* vtklass = ValueKlass::cast(klass);
308 if (vtklass->get_vcc_klass() != target_klass) {
309 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vbox target is not derive value type box");
310 }
311 oop box = vtklass->box(Handle(THREAD, value),
312 InstanceKlass::cast(target_klass),
313 CHECK);
314 thread->set_vm_result(box);
315 IRT_END
316
317 IRT_ENTRY(void, InterpreterRuntime::vunbox(JavaThread* thread, ConstantPool* pool, int index, oopDesc* obj))
318 assert(EnableMVT, "vunbox is supported only when the MVT programming model is enabled");
319 if (obj == NULL) {
320 THROW(vmSymbols::java_lang_NullPointerException());
321 }
322 Klass* target_klass = pool->klass_at(index, CHECK);
323 if (!target_klass->is_value()) {
324 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vunbox target is not value type");
325 }
326 Klass* klass = obj->klass();
327 if ((!klass->is_instance_klass()) || klass->is_value()) {
328 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vunbox source is not an instance");
329 }
330 if (klass != InstanceKlass::cast(target_klass)->get_vcc_klass()) {
331 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vunbox target is not derive value type");
332 }
333 oop value = ValueKlass::cast(target_klass)->unbox(Handle(THREAD, obj),
334 InstanceKlass::cast(target_klass),
335 CHECK);
336 thread->set_vm_result(value);
337 IRT_END
338
339 IRT_ENTRY(void, InterpreterRuntime::qgetfield(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder))
340 Handle value_h(THREAD, obj);
341 InstanceKlass* klass = InstanceKlass::cast(field_holder);
342
343 Klass* field_k = klass->get_value_field_klass(index);
344 ValueKlass* field_vklass = ValueKlass::cast(field_k);
345 field_vklass->initialize(THREAD);
346
347 instanceOop res;
348 bool in_heap;
349 if (klass->is_field_flatten(index)) {
350 // allocate instance
351 res = field_vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
352 instanceHandle res_h(THREAD, res);
353 // copy value
354 field_vklass->value_store(((char*)(oopDesc*)value_h()) + klass->field_offset(index),
355 field_vklass->data_for_oop(res), in_heap, false);
356 thread->set_vm_result(res_h());
357 } else {
358 oop res = value_h()->obj_field_acquire(klass->field_offset(index));
359 if (res == NULL) {
360 res = field_vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
361 }
362 thread->set_vm_result(res);
363 }
364 IRT_END
365
366 IRT_ENTRY(void, InterpreterRuntime::initialize_static_value_field(JavaThread* thread, oopDesc* mirror, int index))
367 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
368 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
369 int offset = klass->field_offset(index);
370 assert(mirror->obj_field(offset) == NULL,"Field must not be initialized twice");
371
372 Klass* field_k = klass->get_value_field_klass(index);
373 ValueKlass* field_vklass = ValueKlass::cast(field_k);
374 // allocate instance, because it is going to be assigned to a static field
375 // it must not be a buffered value
376 instanceOop res = field_vklass->allocate_instance(CHECK);
377 instanceHandle res_h(THREAD, res);
378 mirror_h()->obj_field_put(offset, res_h());
379 thread->set_vm_result(res_h());
380 IRT_END
381
382 IRT_ENTRY(void, InterpreterRuntime::qputfield(JavaThread* thread, oopDesc* obj, oopDesc* value, ConstantPoolCache* cp_cache))
383 Handle value_h(THREAD, value);
384 Handle obj_h(THREAD, obj);
385 assert(!obj_h()->klass()->is_value(), "obj must be an object");
386 assert(value_h()->klass()->is_value(), "value must be an value type");
387
388 int idx = ConstantPool::decode_cpcache_index(get_index_u2_cpcache(thread, Bytecodes::_putfield));
389 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(idx);
390
391 int index = cp_entry->field_index();
392 bool flatten = cp_entry->is_flatten();
393
394 InstanceKlass* klass = InstanceKlass::cast(cp_entry->f1_as_klass());
395 Klass* field_k = klass->get_value_field_klass(index);
396 ValueKlass* field_vklass = ValueKlass::cast(value->klass());
397 assert(field_k == field_vklass, "Field descriptor and argument must match");
398 if (flatten) {
399 // copy value
400 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
401 ((char*)(oopDesc*)obj_h()) + klass->field_offset(index), true, false);
402 } else {
403 if (Universe::heap()->is_in_reserved(value_h())) {
404 obj_h()->obj_field_put(klass->field_offset(index), value_h());
405 } else {
406 // allocate heap instance
407 instanceOop val = field_vklass->allocate_instance(CHECK);
408 instanceHandle res_h(THREAD, val);
409 // copy value
410 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
411 field_vklass->data_for_oop(res_h()), true, false);
412
413
414 obj_h()->obj_field_put(klass->field_offset(index), res_h());
415 }
416 }
417 IRT_END
418
419 IRT_ENTRY(void, InterpreterRuntime::qputstatic(JavaThread* thread, oopDesc* value, int offset, oopDesc* mirror))
420 instanceHandle value_h(THREAD, (instanceOop)value);
421 assert(value_h()->is_value(), "qputstatic only deals with value arguments");
422 if (Universe::heap()->is_in_reserved(value_h())) {
423 mirror->obj_field_put(offset, value_h());
424 } else {
425 // The argument is a buffered value, a copy must be created in the Java heap
426 // because a static field cannot point to a thread-local buffered value
427 ValueKlass* field_vklass = ValueKlass::cast(value_h()->klass());
428 Handle mirror_h(THREAD, mirror);
429 // allocate heap instance
430 instanceOop res = field_vklass->allocate_instance(CHECK);
431 assert(Universe::heap()->is_in_reserved(res), "Must be in the Java heap");
432 instanceHandle res_h(THREAD, res);
433 // copy value
434 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
435 field_vklass->data_for_oop(res), true, false);
436 // writing static field
437 mirror_h->obj_field_put(offset, res_h());
438 assert(mirror_h->obj_field(offset) != NULL,"Sanity check");
439 }
440 IRT_END
441
442 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
443 oop obj = oopFactory::new_typeArray(type, size, CHECK);
444 thread->set_vm_result(obj);
445 IRT_END
446
447
448 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
449 Klass* klass = pool->klass_at(index, CHECK);
450 if (klass->is_value()) { // Logically creates elements, ensure klass init
451 klass->initialize(CHECK);
452 }
453 arrayOop obj = oopFactory::new_array(klass, size, CHECK);
454 thread->set_vm_result(obj);
455 IRT_END
456
457 IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
458 Klass* klass = array->klass();
459 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
460
461 if (klass->is_objArray_klass()) {
462 thread->set_vm_result(((objArrayOop) array)->obj_at(index));
463 }
464 else {
465 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
466 ValueKlass* vklass = vaklass->element_klass();
467 arrayHandle ah(THREAD, array);
468 bool in_heap;
469 instanceOop value_holder = vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
470 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper());
471 vklass->value_store(src, vklass->data_for_oop(value_holder),
472 vaklass->element_byte_size(), in_heap, false);
473 thread->set_vm_result(value_holder);
474 }
475 IRT_END
476
477 IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, arrayOopDesc* array, int index, void* val))
478 Klass* klass = array->klass();
479 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
480
481 if (ArrayKlass::cast(klass)->element_klass() != ((oop)val)->klass()) {
482 THROW(vmSymbols::java_lang_ArrayStoreException());
483 }
484 if (klass->is_objArray_klass()) {
485 if(!Universe::heap()->is_in_reserved(val)) {
486 // A Java heap allocated copy must be made because an array cannot
487 // reference a thread-local buffered value
488 Handle val_h(THREAD, (oop)val);
489 ObjArrayKlass* aklass = ObjArrayKlass::cast(klass);
490 Klass* eklass = aklass->element_klass();
491 assert(eklass->is_value(), "Sanity check");
492 assert(eklass == ((oop)val)->klass(), "Sanity check");
493 ValueKlass* vklass = ValueKlass::cast(eklass);
494 // allocate heap instance
495 instanceOop res = vklass->allocate_instance(CHECK);
496 Handle res_h(THREAD, res);
497 // copy value
498 vklass->value_store(((char*)(oopDesc*)val_h()) + vklass->first_field_offset(),
499 ((char*)(oopDesc*)res_h()) + vklass->first_field_offset(),true, false);
500 val = res_h();
501 }
502 ((objArrayOop) array)->obj_at_put(index, (oop)val);
503 } else {
504 valueArrayOop varray = (valueArrayOop)array;
505 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
506 ValueKlass* vklass = vaklass->element_klass();
507 const int lh = vaklass->layout_helper();
508 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
509 vaklass->element_byte_size(), true, false);
510 }
511 IRT_END
512
513 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
514 // We may want to pass in more arguments - could make this slightly faster
515 ConstantPool* constants = method(thread)->constants();
516 int i = get_index_u2(thread, Bytecodes::_multianewarray);
517 Klass* klass = constants->klass_at(i, CHECK);
518 int nof_dims = number_of_dimensions(thread);
519 assert(klass->is_klass(), "not a class");
520 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
521
522 if (klass->is_value()) { // Logically creates elements, ensure klass init
523 klass->initialize(CHECK);
524 }
525
526 // We must create an array of jints to pass to multi_allocate.
527 ResourceMark rm(thread);
528 const int small_dims = 10;
529 jint dim_array[small_dims];
530 jint *dims = &dim_array[0];
531 if (nof_dims > small_dims) {
532 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
533 }
534 for (int index = 0; index < nof_dims; index++) {
535 // offset from first_size_address is addressed as local[index]
536 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
537 dims[index] = first_size_address[n];
538 }
539 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
540 thread->set_vm_result(obj);
541 IRT_END
542
543 IRT_ENTRY(void, InterpreterRuntime::recycle_vtbuffer(JavaThread* thread))
544 VTBuffer::recycle_vtbuffer(thread, last_frame(thread));
545 IRT_END
546
547 IRT_ENTRY(void, InterpreterRuntime::recycle_buffered_values(JavaThread* thread))
548 frame f = thread->last_frame();
549 assert(f.is_interpreted_frame(), "recycling can only be triggered from interpreted frames");
550 VTBuffer::recycle_vt_in_frame(thread, &f);
551 IRT_END
552
553 IRT_ENTRY(void, InterpreterRuntime::fix_frame_vt_alloc_ptr(JavaThread* thread))
554 frame f = thread->last_frame();
555 VTBuffer::fix_frame_vt_alloc_ptr(f, VTBufferChunk::chunk(thread->vt_alloc_ptr()));
556 IRT_END
557
558 IRT_ENTRY(void, InterpreterRuntime::return_value(JavaThread* thread, oopDesc* obj))
559 if (Universe::heap()->is_in_reserved(obj)) {
560 thread->set_vm_result(obj);
561 return;
562 }
563 assert(obj->klass()->is_value(), "Sanity check");
564 ValueKlass* vk = ValueKlass::cast(obj->klass());
565 RegisterMap reg_map(thread, false);
566 frame current_frame = last_frame(thread);
567 frame caller_frame = current_frame.sender(®_map);
568 if (!caller_frame.is_interpreted_frame()) {
569 // caller is not an interpreted frame, creating a new value in Java heap
570 Handle obj_h(THREAD, obj);
571 instanceOop res = vk->allocate_instance(CHECK);
572 Handle res_h(THREAD, res);
573 // copy value
574 vk->value_store(vk->data_for_oop(obj_h()),
575 vk->data_for_oop(res_h()), true, false);
576 thread->set_vm_result(res_h());
577 return;
578 } else {
579 oop dest = VTBuffer::relocate_return_value(thread, current_frame, obj);
580 thread->set_vm_result(dest);
581 }
582 IRT_END
583
584 IRT_ENTRY(void, InterpreterRuntime::check_areturn(JavaThread* thread, oopDesc* obj))
585 if (obj != NULL) {
586 Klass* k = obj->klass();
587 if (k->is_value()) {
588 ResourceMark rm(thread);
589 tty->print_cr("areturn used on a value from %s", k->name()->as_C_string());
590 }
591 assert(!k->is_value(), "areturn should never be used on values");
592 }
593 thread->set_vm_result(obj);
594 IRT_END
595
596 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
597 assert(oopDesc::is_oop(obj), "must be a valid oop");
598 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
599 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
600 IRT_END
601
602
603 // Quicken instance-of and check-cast bytecodes
604 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
605 // Force resolving; quicken the bytecode
606 int which = get_index_u2(thread, Bytecodes::_checkcast);
607 ConstantPool* cpool = method(thread)->constants();
608 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
609 // program we might have seen an unquick'd bytecode in the interpreter but have another
610 // thread quicken the bytecode before we get here.
611 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
612 Klass* klass = cpool->klass_at(which, CHECK);
613 thread->set_vm_result_2(klass);
614 IRT_END
615
616
617 //------------------------------------------------------------------------------------------------------------------------
618 // Exceptions
619
620 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
621 const methodHandle& trap_method, int trap_bci, TRAPS) {
622 if (trap_method.not_null()) {
623 MethodData* trap_mdo = trap_method->method_data();
624 if (trap_mdo == NULL) {
625 Method::build_interpreter_method_data(trap_method, THREAD);
626 if (HAS_PENDING_EXCEPTION) {
627 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
628 "we expect only an OOM error here");
629 CLEAR_PENDING_EXCEPTION;
630 }
631 trap_mdo = trap_method->method_data();
632 // and fall through...
633 }
634 if (trap_mdo != NULL) {
635 // Update per-method count of trap events. The interpreter
636 // is updating the MDO to simulate the effect of compiler traps.
637 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
638 }
639 }
640 }
641
642 // Assume the compiler is (or will be) interested in this event.
643 // If necessary, create an MDO to hold the information, and record it.
644 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
645 assert(ProfileTraps, "call me only if profiling");
646 methodHandle trap_method(thread, method(thread));
647 int trap_bci = trap_method->bci_from(bcp(thread));
648 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
649 }
650
651 #ifdef CC_INTERP
652 // As legacy note_trap, but we have more arguments.
653 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
654 methodHandle trap_method(method);
655 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
656 IRT_END
657
658 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
659 // for each exception.
660 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
661 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
662 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
663 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
664 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
665 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
666 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
667 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
668 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
669 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
670 #endif // CC_INTERP
671
672
673 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
674 // get klass
675 InstanceKlass* klass = InstanceKlass::cast(k);
676 assert(klass->is_initialized(),
677 "this klass should have been initialized during VM initialization");
678 // create instance - do not call constructor since we may have no
679 // (java) stack space left (should assert constructor is empty)
680 Handle exception;
681 oop exception_oop = klass->allocate_instance(CHECK_(exception));
682 exception = Handle(THREAD, exception_oop);
683 if (StackTraceInThrowable) {
684 java_lang_Throwable::fill_in_stack_trace(exception);
685 }
686 return exception;
687 }
688
689 // Special handling for stack overflow: since we don't have any (java) stack
690 // space left we use the pre-allocated & pre-initialized StackOverflowError
691 // klass to create an stack overflow error instance. We do not call its
692 // constructor for the same reason (it is empty, anyway).
693 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
694 Handle exception = get_preinitialized_exception(
695 SystemDictionary::StackOverflowError_klass(),
696 CHECK);
697 // Increment counter for hs_err file reporting
698 Atomic::inc(&Exceptions::_stack_overflow_errors);
699 THROW_HANDLE(exception);
700 IRT_END
701
702 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
703 Handle exception = get_preinitialized_exception(
704 SystemDictionary::StackOverflowError_klass(),
705 CHECK);
706 java_lang_Throwable::set_message(exception(),
707 Universe::delayed_stack_overflow_error_message());
708 // Increment counter for hs_err file reporting
709 Atomic::inc(&Exceptions::_stack_overflow_errors);
710 THROW_HANDLE(exception);
711 IRT_END
712
713 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
714 // lookup exception klass
715 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
716 if (ProfileTraps) {
717 if (s == vmSymbols::java_lang_ArithmeticException()) {
718 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
719 } else if (s == vmSymbols::java_lang_NullPointerException()) {
720 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
721 }
722 }
723 // create exception
724 Handle exception = Exceptions::new_exception(thread, s, message);
725 thread->set_vm_result(exception());
726 IRT_END
727
728
729 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
730 ResourceMark rm(thread);
731 const char* klass_name = obj->klass()->external_name();
732 // lookup exception klass
733 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
734 if (ProfileTraps) {
735 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
736 }
737 // create exception, with klass name as detail message
738 Handle exception = Exceptions::new_exception(thread, s, klass_name);
739 thread->set_vm_result(exception());
740 IRT_END
741
742
743 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
744 char message[jintAsStringSize];
745 // lookup exception klass
746 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
747 if (ProfileTraps) {
748 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
749 }
750 // create exception
751 sprintf(message, "%d", index);
752 THROW_MSG(s, message);
753 IRT_END
754
755 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
756 JavaThread* thread, oopDesc* obj))
757
758 ResourceMark rm(thread);
759 char* message = SharedRuntime::generate_class_cast_message(
760 thread, obj->klass());
761
762 if (ProfileTraps) {
763 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
764 }
765
766 // create exception
767 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
768 IRT_END
769
770 // exception_handler_for_exception(...) returns the continuation address,
771 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
772 // The exception oop is returned to make sure it is preserved over GC (it
773 // is only on the stack if the exception was thrown explicitly via athrow).
774 // During this operation, the expression stack contains the values for the
775 // bci where the exception happened. If the exception was propagated back
776 // from a call, the expression stack contains the values for the bci at the
777 // invoke w/o arguments (i.e., as if one were inside the call).
778 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
779
780 Handle h_exception(thread, exception);
781 methodHandle h_method (thread, method(thread));
782 constantPoolHandle h_constants(thread, h_method->constants());
783 bool should_repeat;
784 int handler_bci;
785 int current_bci = bci(thread);
786
787 if (thread->frames_to_pop_failed_realloc() > 0) {
788 // Allocation of scalar replaced object used in this frame
789 // failed. Unconditionally pop the frame.
790 thread->dec_frames_to_pop_failed_realloc();
791 thread->set_vm_result(h_exception());
792 // If the method is synchronized we already unlocked the monitor
793 // during deoptimization so the interpreter needs to skip it when
794 // the frame is popped.
795 thread->set_do_not_unlock_if_synchronized(true);
796 #ifdef CC_INTERP
797 return (address) -1;
798 #else
799 return Interpreter::remove_activation_entry();
800 #endif
801 }
802
803 // Need to do this check first since when _do_not_unlock_if_synchronized
804 // is set, we don't want to trigger any classloading which may make calls
805 // into java, or surprisingly find a matching exception handler for bci 0
806 // since at this moment the method hasn't been "officially" entered yet.
807 if (thread->do_not_unlock_if_synchronized()) {
808 ResourceMark rm;
809 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
810 thread->set_vm_result(exception);
811 #ifdef CC_INTERP
812 return (address) -1;
813 #else
814 return Interpreter::remove_activation_entry();
815 #endif
816 }
817
818 do {
819 should_repeat = false;
820
821 // assertions
822 #ifdef ASSERT
823 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
824 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
825 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
826 if (ExitVMOnVerifyError) vm_exit(-1);
827 ShouldNotReachHere();
828 }
829 #endif
830
831 // tracing
832 if (log_is_enabled(Info, exceptions)) {
833 ResourceMark rm(thread);
834 stringStream tempst;
835 tempst.print("interpreter method <%s>\n"
836 " at bci %d for thread " INTPTR_FORMAT,
837 h_method->print_value_string(), current_bci, p2i(thread));
838 Exceptions::log_exception(h_exception, tempst);
839 }
840 // Don't go paging in something which won't be used.
841 // else if (extable->length() == 0) {
842 // // disabled for now - interpreter is not using shortcut yet
843 // // (shortcut is not to call runtime if we have no exception handlers)
844 // // warning("performance bug: should not call runtime if method has no exception handlers");
845 // }
846 // for AbortVMOnException flag
847 Exceptions::debug_check_abort(h_exception);
848
849 // exception handler lookup
850 Klass* klass = h_exception->klass();
851 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
852 if (HAS_PENDING_EXCEPTION) {
853 // We threw an exception while trying to find the exception handler.
854 // Transfer the new exception to the exception handle which will
855 // be set into thread local storage, and do another lookup for an
856 // exception handler for this exception, this time starting at the
857 // BCI of the exception handler which caused the exception to be
858 // thrown (bug 4307310).
859 h_exception = Handle(THREAD, PENDING_EXCEPTION);
860 CLEAR_PENDING_EXCEPTION;
861 if (handler_bci >= 0) {
862 current_bci = handler_bci;
863 should_repeat = true;
864 }
865 }
866 } while (should_repeat == true);
867
868 #if INCLUDE_JVMCI
869 if (EnableJVMCI && h_method->method_data() != NULL) {
870 ResourceMark rm(thread);
871 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
872 if (pdata != NULL && pdata->is_BitData()) {
873 BitData* bit_data = (BitData*) pdata;
874 bit_data->set_exception_seen();
875 }
876 }
877 #endif
878
879 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
880 // time throw or a stack unwinding throw and accordingly notify the debugger
881 if (JvmtiExport::can_post_on_exceptions()) {
882 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
883 }
884
885 #ifdef CC_INTERP
886 address continuation = (address)(intptr_t) handler_bci;
887 #else
888 address continuation = NULL;
889 #endif
890 address handler_pc = NULL;
891 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
892 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
893 // handler in this method, or (b) after a stack overflow there is not yet
894 // enough stack space available to reprotect the stack.
895 #ifndef CC_INTERP
896 continuation = Interpreter::remove_activation_entry();
897 #endif
898 #if COMPILER2_OR_JVMCI
899 // Count this for compilation purposes
900 h_method->interpreter_throwout_increment(THREAD);
901 #endif
902 } else {
903 // handler in this method => change bci/bcp to handler bci/bcp and continue there
904 handler_pc = h_method->code_base() + handler_bci;
905 #ifndef CC_INTERP
906 set_bcp_and_mdp(handler_pc, thread);
907 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
908 #endif
909 }
910 // notify debugger of an exception catch
911 // (this is good for exceptions caught in native methods as well)
912 if (JvmtiExport::can_post_on_exceptions()) {
913 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
914 }
915
916 thread->set_vm_result(h_exception());
917 return continuation;
918 IRT_END
919
920
921 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
922 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
923 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
924 IRT_END
925
926
927 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
928 THROW(vmSymbols::java_lang_AbstractMethodError());
929 IRT_END
930
931
932 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
933 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
934 IRT_END
935
936
937 //------------------------------------------------------------------------------------------------------------------------
938 // Fields
939 //
940
941 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
942 Thread* THREAD = thread;
943 // resolve field
944 fieldDescriptor info;
945 constantPoolHandle pool(thread, method(thread)->constants());
946 methodHandle m(thread, method(thread));
947 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
948 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_vwithfield);
949 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
950 bool is_value = bytecode == Bytecodes::_vwithfield;
951
952 {
953 JvmtiHideSingleStepping jhss(thread);
954 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
955 m, bytecode, CHECK);
956 } // end JvmtiHideSingleStepping
957
958 // check if link resolution caused cpCache to be updated
959 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
960 if (cp_cache_entry->is_resolved(bytecode)) return;
961
962 // compute auxiliary field attributes
963 TosState state = as_TosState(info.field_type());
964
965 // Resolution of put instructions on final fields is delayed. That is required so that
966 // exceptions are thrown at the correct place (when the instruction is actually invoked).
967 // If we do not resolve an instruction in the current pass, leaving the put_code
968 // set to zero will cause the next put instruction to the same field to reresolve.
969
970 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
971 // to final instance fields with updates originating from a method different than <init>)
972 // is inhibited. A putfield instruction targeting an instance final field must throw
973 // an IllegalAccessError if the instruction is not in an instance
974 // initializer method <init>. If resolution were not inhibited, a putfield
975 // in an initializer method could be resolved in the initializer. Subsequent
976 // putfield instructions to the same field would then use cached information.
977 // As a result, those instructions would not pass through the VM. That is,
978 // checks in resolve_field_access() would not be executed for those instructions
979 // and the required IllegalAccessError would not be thrown.
980 //
981 // Also, we need to delay resolving getstatic and putstatic instructions until the
982 // class is initialized. This is required so that access to the static
983 // field will call the initialization function every time until the class
984 // is completely initialized ala. in 2.17.5 in JVM Specification.
985 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
986 bool uninitialized_static = is_static && !klass->is_initialized();
987 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
988 info.has_initialized_final_update();
989 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
990
991 Bytecodes::Code get_code = (Bytecodes::Code)0;
992 Bytecodes::Code put_code = (Bytecodes::Code)0;
993 if (!uninitialized_static) {
994 if (is_static) {
995 get_code = Bytecodes::_getstatic;
996 } else {
997 get_code = Bytecodes::_getfield;
998 }
999 if (is_put && is_value) {
1000 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_vwithfield);
1001 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
1002 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
1003 }
1004 }
1005
1006 cp_cache_entry->set_field(
1007 get_code,
1008 put_code,
1009 info.field_holder(),
1010 info.index(),
1011 info.offset(),
1012 state,
1013 info.access_flags().is_final(),
1014 info.access_flags().is_volatile(),
1015 info.is_flatten(),
1016 pool->pool_holder()
1017 );
1018 }
1019
1020
1021 //------------------------------------------------------------------------------------------------------------------------
1022 // Synchronization
1023 //
1024 // The interpreter's synchronization code is factored out so that it can
1025 // be shared by method invocation and synchronized blocks.
1026 //%note synchronization_3
1027
1028 //%note monitor_1
1029 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
1030 #ifdef ASSERT
1031 thread->last_frame().interpreter_frame_verify_monitor(elem);
1032 #endif
1033 if (PrintBiasedLockingStatistics) {
1034 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
1035 }
1036 Handle h_obj(thread, elem->obj());
1037 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1038 "must be NULL or an object");
1039 if (UseBiasedLocking) {
1040 // Retry fast entry if bias is revoked to avoid unnecessary inflation
1041 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
1042 } else {
1043 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
1044 }
1045 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
1046 "must be NULL or an object");
1047 #ifdef ASSERT
1048 thread->last_frame().interpreter_frame_verify_monitor(elem);
1049 #endif
1050 IRT_END
1051
1052
1053 //%note monitor_1
1054 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
1055 #ifdef ASSERT
1056 thread->last_frame().interpreter_frame_verify_monitor(elem);
1057 #endif
1058 Handle h_obj(thread, elem->obj());
1059 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1060 "must be NULL or an object");
1061 if (elem == NULL || h_obj()->is_unlocked()) {
1062 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1063 }
1064 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
1065 // Free entry. This must be done here, since a pending exception might be installed on
1066 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
1067 elem->set_obj(NULL);
1068 #ifdef ASSERT
1069 thread->last_frame().interpreter_frame_verify_monitor(elem);
1070 #endif
1071 IRT_END
1072
1073
1074 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
1075 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1076 IRT_END
1077
1078
1079 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
1080 // Returns an illegal exception to install into the current thread. The
1081 // pending_exception flag is cleared so normal exception handling does not
1082 // trigger. Any current installed exception will be overwritten. This
1083 // method will be called during an exception unwind.
1084
1085 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1086 Handle exception(thread, thread->vm_result());
1087 assert(exception() != NULL, "vm result should be set");
1088 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1089 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
1090 exception = get_preinitialized_exception(
1091 SystemDictionary::IllegalMonitorStateException_klass(),
1092 CATCH);
1093 }
1094 thread->set_vm_result(exception());
1095 IRT_END
1096
1097
1098 //------------------------------------------------------------------------------------------------------------------------
1099 // Invokes
1100
1101 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
1102 return method->orig_bytecode_at(method->bci_from(bcp));
1103 IRT_END
1104
1105 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
1106 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1107 IRT_END
1108
1109 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
1110 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
1111 IRT_END
1112
1113 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
1114 Thread* THREAD = thread;
1115 // extract receiver from the outgoing argument list if necessary
1116 Handle receiver(thread, NULL);
1117 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1118 bytecode == Bytecodes::_invokespecial) {
1119 ResourceMark rm(thread);
1120 methodHandle m (thread, method(thread));
1121 Bytecode_invoke call(m, bci(thread));
1122 Symbol* signature = call.signature();
1123 receiver = Handle(thread,
1124 thread->last_frame().interpreter_callee_receiver(signature));
1125 assert(Universe::heap()->is_in_reserved_or_null(receiver())
1126 || VTBuffer::is_in_vt_buffer(receiver()),
1127 "sanity check");
1128 assert(receiver.is_null() ||
1129 !Universe::heap()->is_in_reserved(receiver->klass()),
1130 "sanity check");
1131 }
1132
1133 // resolve method
1134 CallInfo info;
1135 constantPoolHandle pool(thread, method(thread)->constants());
1136
1137 {
1138 JvmtiHideSingleStepping jhss(thread);
1139 LinkResolver::resolve_invoke(info, receiver, pool,
1140 get_index_u2_cpcache(thread, bytecode), bytecode,
1141 CHECK);
1142 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
1143 int retry_count = 0;
1144 while (info.resolved_method()->is_old()) {
1145 // It is very unlikely that method is redefined more than 100 times
1146 // in the middle of resolve. If it is looping here more than 100 times
1147 // means then there could be a bug here.
1148 guarantee((retry_count++ < 100),
1149 "Could not resolve to latest version of redefined method");
1150 // method is redefined in the middle of resolve so re-try.
1151 LinkResolver::resolve_invoke(info, receiver, pool,
1152 get_index_u2_cpcache(thread, bytecode), bytecode,
1153 CHECK);
1154 }
1155 }
1156 } // end JvmtiHideSingleStepping
1157
1158 // check if link resolution caused cpCache to be updated
1159 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
1160 if (cp_cache_entry->is_resolved(bytecode)) return;
1161
1162 #ifdef ASSERT
1163 if (bytecode == Bytecodes::_invokeinterface) {
1164 if (info.resolved_method()->method_holder() ==
1165 SystemDictionary::Object_klass()) {
1166 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1167 // (see also CallInfo::set_interface for details)
1168 assert(info.call_kind() == CallInfo::vtable_call ||
1169 info.call_kind() == CallInfo::direct_call, "");
1170 methodHandle rm = info.resolved_method();
1171 assert(rm->is_final() || info.has_vtable_index(),
1172 "should have been set already");
1173 } else if (!info.resolved_method()->has_itable_index()) {
1174 // Resolved something like CharSequence.toString. Use vtable not itable.
1175 assert(info.call_kind() != CallInfo::itable_call, "");
1176 } else {
1177 // Setup itable entry
1178 assert(info.call_kind() == CallInfo::itable_call, "");
1179 int index = info.resolved_method()->itable_index();
1180 assert(info.itable_index() == index, "");
1181 }
1182 } else if (bytecode == Bytecodes::_invokespecial) {
1183 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1184 } else {
1185 assert(info.call_kind() == CallInfo::direct_call ||
1186 info.call_kind() == CallInfo::vtable_call, "");
1187 }
1188 #endif
1189 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
1190 // it is not an interface. The receiver for invokespecial calls within interface
1191 // methods must be checked for every call.
1192 InstanceKlass* sender = pool->pool_holder();
1193 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1194
1195 switch (info.call_kind()) {
1196 case CallInfo::direct_call:
1197 cp_cache_entry->set_direct_call(
1198 bytecode,
1199 info.resolved_method(),
1200 sender->is_interface());
1201 break;
1202 case CallInfo::vtable_call:
1203 cp_cache_entry->set_vtable_call(
1204 bytecode,
1205 info.resolved_method(),
1206 info.vtable_index());
1207 break;
1208 case CallInfo::itable_call:
1209 cp_cache_entry->set_itable_call(
1210 bytecode,
1211 info.resolved_method(),
1212 info.itable_index());
1213 break;
1214 default: ShouldNotReachHere();
1215 }
1216 }
1217
1218
1219 // First time execution: Resolve symbols, create a permanent MethodType object.
1220 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1221 Thread* THREAD = thread;
1222 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1223
1224 // resolve method
1225 CallInfo info;
1226 constantPoolHandle pool(thread, method(thread)->constants());
1227 {
1228 JvmtiHideSingleStepping jhss(thread);
1229 LinkResolver::resolve_invoke(info, Handle(), pool,
1230 get_index_u2_cpcache(thread, bytecode), bytecode,
1231 CHECK);
1232 } // end JvmtiHideSingleStepping
1233
1234 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
1235 cp_cache_entry->set_method_handle(pool, info);
1236 }
1237
1238 // First time execution: Resolve symbols, create a permanent CallSite object.
1239 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1240 Thread* THREAD = thread;
1241 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1242
1243 //TO DO: consider passing BCI to Java.
1244 // int caller_bci = method(thread)->bci_from(bcp(thread));
1245
1246 // resolve method
1247 CallInfo info;
1248 constantPoolHandle pool(thread, method(thread)->constants());
1249 int index = get_index_u4(thread, bytecode);
1250 {
1251 JvmtiHideSingleStepping jhss(thread);
1252 LinkResolver::resolve_invoke(info, Handle(), pool,
1253 index, bytecode, CHECK);
1254 } // end JvmtiHideSingleStepping
1255
1256 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1257 cp_cache_entry->set_dynamic_call(pool, info);
1258 }
1259
1260 // This function is the interface to the assembly code. It returns the resolved
1261 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1262 // This function will check for redefinition!
1263 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1264 switch (bytecode) {
1265 case Bytecodes::_getstatic:
1266 case Bytecodes::_putstatic:
1267 case Bytecodes::_getfield:
1268 case Bytecodes::_putfield:
1269 case Bytecodes::_vwithfield:
1270 resolve_get_put(thread, bytecode);
1271 break;
1272 case Bytecodes::_invokevirtual:
1273 case Bytecodes::_invokespecial:
1274 case Bytecodes::_invokestatic:
1275 case Bytecodes::_invokeinterface:
1276 resolve_invoke(thread, bytecode);
1277 break;
1278 case Bytecodes::_invokehandle:
1279 resolve_invokehandle(thread);
1280 break;
1281 case Bytecodes::_invokedynamic:
1282 resolve_invokedynamic(thread);
1283 break;
1284 default:
1285 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1286 break;
1287 }
1288 }
1289 IRT_END
1290
1291 //------------------------------------------------------------------------------------------------------------------------
1292 // Miscellaneous
1293
1294
1295 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1296 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1297 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1298 if (branch_bcp != NULL && nm != NULL) {
1299 // This was a successful request for an OSR nmethod. Because
1300 // frequency_counter_overflow_inner ends with a safepoint check,
1301 // nm could have been unloaded so look it up again. It's unsafe
1302 // to examine nm directly since it might have been freed and used
1303 // for something else.
1304 frame fr = thread->last_frame();
1305 Method* method = fr.interpreter_frame_method();
1306 int bci = method->bci_from(fr.interpreter_frame_bcp());
1307 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1308 }
1309 #ifndef PRODUCT
1310 if (TraceOnStackReplacement) {
1311 if (nm != NULL) {
1312 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1313 nm->print();
1314 }
1315 }
1316 #endif
1317 return nm;
1318 }
1319
1320 IRT_ENTRY(nmethod*,
1321 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1322 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1323 // flag, in case this method triggers classloading which will call into Java.
1324 UnlockFlagSaver fs(thread);
1325
1326 frame fr = thread->last_frame();
1327 assert(fr.is_interpreted_frame(), "must come from interpreter");
1328 methodHandle method(thread, fr.interpreter_frame_method());
1329 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1330 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
1331
1332 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1333 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1334 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1335
1336 if (osr_nm != NULL) {
1337 // We may need to do on-stack replacement which requires that no
1338 // monitors in the activation are biased because their
1339 // BasicObjectLocks will need to migrate during OSR. Force
1340 // unbiasing of all monitors in the activation now (even though
1341 // the OSR nmethod might be invalidated) because we don't have a
1342 // safepoint opportunity later once the migration begins.
1343 if (UseBiasedLocking) {
1344 ResourceMark rm;
1345 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1346 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
1347 kptr < fr.interpreter_frame_monitor_begin();
1348 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
1349 if( kptr->obj() != NULL ) {
1350 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1351 }
1352 }
1353 BiasedLocking::revoke(objects_to_revoke);
1354 }
1355 }
1356 return osr_nm;
1357 IRT_END
1358
1359 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1360 assert(ProfileInterpreter, "must be profiling interpreter");
1361 int bci = method->bci_from(cur_bcp);
1362 MethodData* mdo = method->method_data();
1363 if (mdo == NULL) return 0;
1364 return mdo->bci_to_di(bci);
1365 IRT_END
1366
1367 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1368 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1369 // flag, in case this method triggers classloading which will call into Java.
1370 UnlockFlagSaver fs(thread);
1371
1372 assert(ProfileInterpreter, "must be profiling interpreter");
1373 frame fr = thread->last_frame();
1374 assert(fr.is_interpreted_frame(), "must come from interpreter");
1375 methodHandle method(thread, fr.interpreter_frame_method());
1376 Method::build_interpreter_method_data(method, THREAD);
1377 if (HAS_PENDING_EXCEPTION) {
1378 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1379 CLEAR_PENDING_EXCEPTION;
1380 // and fall through...
1381 }
1382 IRT_END
1383
1384
1385 #ifdef ASSERT
1386 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1387 assert(ProfileInterpreter, "must be profiling interpreter");
1388
1389 MethodData* mdo = method->method_data();
1390 assert(mdo != NULL, "must not be null");
1391
1392 int bci = method->bci_from(bcp);
1393
1394 address mdp2 = mdo->bci_to_dp(bci);
1395 if (mdp != mdp2) {
1396 ResourceMark rm;
1397 ResetNoHandleMark rnm; // In a LEAF entry.
1398 HandleMark hm;
1399 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1400 int current_di = mdo->dp_to_di(mdp);
1401 int expected_di = mdo->dp_to_di(mdp2);
1402 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1403 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1404 int approx_bci = -1;
1405 if (current_di >= 0) {
1406 approx_bci = mdo->data_at(current_di)->bci();
1407 }
1408 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1409 mdo->print_on(tty);
1410 method->print_codes();
1411 }
1412 assert(mdp == mdp2, "wrong mdp");
1413 IRT_END
1414 #endif // ASSERT
1415
1416 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1417 assert(ProfileInterpreter, "must be profiling interpreter");
1418 ResourceMark rm(thread);
1419 HandleMark hm(thread);
1420 frame fr = thread->last_frame();
1421 assert(fr.is_interpreted_frame(), "must come from interpreter");
1422 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1423
1424 // Grab a lock to ensure atomic access to setting the return bci and
1425 // the displacement. This can block and GC, invalidating all naked oops.
1426 MutexLocker ml(RetData_lock);
1427
1428 // ProfileData is essentially a wrapper around a derived oop, so we
1429 // need to take the lock before making any ProfileData structures.
1430 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1431 guarantee(data != NULL, "profile data must be valid");
1432 RetData* rdata = data->as_RetData();
1433 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1434 fr.interpreter_frame_set_mdp(new_mdp);
1435 IRT_END
1436
1437 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1438 MethodCounters* mcs = Method::build_method_counters(m, thread);
1439 if (HAS_PENDING_EXCEPTION) {
1440 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1441 CLEAR_PENDING_EXCEPTION;
1442 }
1443 return mcs;
1444 IRT_END
1445
1446
1447 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1448 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1449 // stack traversal automatically takes care of preserving arguments for invoke, so
1450 // this is no longer needed.
1451
1452 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1453 // if this is called during a safepoint
1454
1455 if (JvmtiExport::should_post_single_step()) {
1456 // We are called during regular safepoints and when the VM is
1457 // single stepping. If any thread is marked for single stepping,
1458 // then we may have JVMTI work to do.
1459 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1460 }
1461 IRT_END
1462
1463 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1464 ConstantPoolCacheEntry *cp_entry))
1465
1466 // check the access_flags for the field in the klass
1467
1468 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1469 int index = cp_entry->field_index();
1470 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1471
1472 bool is_static = (obj == NULL);
1473 HandleMark hm(thread);
1474
1475 Handle h_obj;
1476 if (!is_static) {
1477 // non-static field accessors have an object, but we need a handle
1478 h_obj = Handle(thread, obj);
1479 }
1480 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1481 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1482 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), cp_entry_f1, h_obj, fid);
1483 IRT_END
1484
1485 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1486 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1487
1488 Klass* k = cp_entry->f1_as_klass();
1489
1490 // check the access_flags for the field in the klass
1491 InstanceKlass* ik = InstanceKlass::cast(k);
1492 int index = cp_entry->field_index();
1493 // bail out if field modifications are not watched
1494 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1495
1496 char sig_type = '\0';
1497
1498 switch(cp_entry->flag_state()) {
1499 case btos: sig_type = 'B'; break;
1500 case ztos: sig_type = 'Z'; break;
1501 case ctos: sig_type = 'C'; break;
1502 case stos: sig_type = 'S'; break;
1503 case itos: sig_type = 'I'; break;
1504 case ftos: sig_type = 'F'; break;
1505 case atos: sig_type = 'L'; break;
1506 case ltos: sig_type = 'J'; break;
1507 case dtos: sig_type = 'D'; break;
1508 default: ShouldNotReachHere(); return;
1509 }
1510 bool is_static = (obj == NULL);
1511
1512 HandleMark hm(thread);
1513 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1514 jvalue fvalue;
1515 #ifdef _LP64
1516 fvalue = *value;
1517 #else
1518 // Long/double values are stored unaligned and also noncontiguously with
1519 // tagged stacks. We can't just do a simple assignment even in the non-
1520 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1521 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1522 // We assume that the two halves of longs/doubles are stored in interpreter
1523 // stack slots in platform-endian order.
1524 jlong_accessor u;
1525 jint* newval = (jint*)value;
1526 u.words[0] = newval[0];
1527 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1528 fvalue.j = u.long_value;
1529 #endif // _LP64
1530
1531 Handle h_obj;
1532 if (!is_static) {
1533 // non-static field accessors have an object, but we need a handle
1534 h_obj = Handle(thread, obj);
1535 }
1536
1537 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), ik, h_obj,
1538 fid, sig_type, &fvalue);
1539 IRT_END
1540
1541 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1542 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1543 IRT_END
1544
1545
1546 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1547 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1548 IRT_END
1549
1550 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1551 {
1552 return (Interpreter::contains(pc) ? 1 : 0);
1553 }
1554 IRT_END
1555
1556
1557 // Implementation of SignatureHandlerLibrary
1558
1559 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1560 // Dummy definition (else normalization method is defined in CPU
1561 // dependant code)
1562 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1563 return fingerprint;
1564 }
1565 #endif
1566
1567 address SignatureHandlerLibrary::set_handler_blob() {
1568 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1569 if (handler_blob == NULL) {
1570 return NULL;
1571 }
1572 address handler = handler_blob->code_begin();
1573 _handler_blob = handler_blob;
1574 _handler = handler;
1575 return handler;
1576 }
1577
1578 void SignatureHandlerLibrary::initialize() {
1579 if (_fingerprints != NULL) {
1580 return;
1581 }
1582 if (set_handler_blob() == NULL) {
1583 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1584 }
1585
1586 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1587 SignatureHandlerLibrary::buffer_size);
1588 _buffer = bb->code_begin();
1589
1590 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1591 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1592 }
1593
1594 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1595 address handler = _handler;
1596 int insts_size = buffer->pure_insts_size();
1597 if (handler + insts_size > _handler_blob->code_end()) {
1598 // get a new handler blob
1599 handler = set_handler_blob();
1600 }
1601 if (handler != NULL) {
1602 memcpy(handler, buffer->insts_begin(), insts_size);
1603 pd_set_handler(handler);
1604 ICache::invalidate_range(handler, insts_size);
1605 _handler = handler + insts_size;
1606 }
1607 return handler;
1608 }
1609
1610 void SignatureHandlerLibrary::add(const methodHandle& method) {
1611 if (method->signature_handler() == NULL) {
1612 // use slow signature handler if we can't do better
1613 int handler_index = -1;
1614 // check if we can use customized (fast) signature handler
1615 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1616 // use customized signature handler
1617 MutexLocker mu(SignatureHandlerLibrary_lock);
1618 // make sure data structure is initialized
1619 initialize();
1620 // lookup method signature's fingerprint
1621 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1622 // allow CPU dependant code to optimize the fingerprints for the fast handler
1623 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1624 handler_index = _fingerprints->find(fingerprint);
1625 // create handler if necessary
1626 if (handler_index < 0) {
1627 ResourceMark rm;
1628 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1629 CodeBuffer buffer((address)(_buffer + align_offset),
1630 SignatureHandlerLibrary::buffer_size - align_offset);
1631 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1632 // copy into code heap
1633 address handler = set_handler(&buffer);
1634 if (handler == NULL) {
1635 // use slow signature handler (without memorizing it in the fingerprints)
1636 } else {
1637 // debugging suppport
1638 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1639 ttyLocker ttyl;
1640 tty->cr();
1641 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1642 _handlers->length(),
1643 (method->is_static() ? "static" : "receiver"),
1644 method->name_and_sig_as_C_string(),
1645 fingerprint,
1646 buffer.insts_size());
1647 if (buffer.insts_size() > 0) {
1648 Disassembler::decode(handler, handler + buffer.insts_size());
1649 }
1650 #ifndef PRODUCT
1651 address rh_begin = Interpreter::result_handler(method()->result_type());
1652 if (CodeCache::contains(rh_begin)) {
1653 // else it might be special platform dependent values
1654 tty->print_cr(" --- associated result handler ---");
1655 address rh_end = rh_begin;
1656 while (*(int*)rh_end != 0) {
1657 rh_end += sizeof(int);
1658 }
1659 Disassembler::decode(rh_begin, rh_end);
1660 } else {
1661 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1662 }
1663 #endif
1664 }
1665 // add handler to library
1666 _fingerprints->append(fingerprint);
1667 _handlers->append(handler);
1668 // set handler index
1669 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1670 handler_index = _fingerprints->length() - 1;
1671 }
1672 }
1673 // Set handler under SignatureHandlerLibrary_lock
1674 if (handler_index < 0) {
1675 // use generic signature handler
1676 method->set_signature_handler(Interpreter::slow_signature_handler());
1677 } else {
1678 // set handler
1679 method->set_signature_handler(_handlers->at(handler_index));
1680 }
1681 } else {
1682 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1683 // use generic signature handler
1684 method->set_signature_handler(Interpreter::slow_signature_handler());
1685 }
1686 }
1687 #ifdef ASSERT
1688 int handler_index = -1;
1689 int fingerprint_index = -2;
1690 {
1691 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1692 // in any way if accessed from multiple threads. To avoid races with another
1693 // thread which may change the arrays in the above, mutex protected block, we
1694 // have to protect this read access here with the same mutex as well!
1695 MutexLocker mu(SignatureHandlerLibrary_lock);
1696 if (_handlers != NULL) {
1697 handler_index = _handlers->find(method->signature_handler());
1698 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1699 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1700 fingerprint_index = _fingerprints->find(fingerprint);
1701 }
1702 }
1703 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1704 handler_index == fingerprint_index, "sanity check");
1705 #endif // ASSERT
1706 }
1707
1708 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1709 int handler_index = -1;
1710 // use customized signature handler
1711 MutexLocker mu(SignatureHandlerLibrary_lock);
1712 // make sure data structure is initialized
1713 initialize();
1714 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1715 handler_index = _fingerprints->find(fingerprint);
1716 // create handler if necessary
1717 if (handler_index < 0) {
1718 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1719 tty->cr();
1720 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1721 _handlers->length(),
1722 p2i(handler),
1723 fingerprint);
1724 }
1725 _fingerprints->append(fingerprint);
1726 _handlers->append(handler);
1727 } else {
1728 if (PrintSignatureHandlers) {
1729 tty->cr();
1730 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1731 _handlers->length(),
1732 fingerprint,
1733 p2i(_handlers->at(handler_index)),
1734 p2i(handler));
1735 }
1736 }
1737 }
1738
1739
1740 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1741 address SignatureHandlerLibrary::_handler = NULL;
1742 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1743 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1744 address SignatureHandlerLibrary::_buffer = NULL;
1745
1746
1747 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1748 methodHandle m(thread, method);
1749 assert(m->is_native(), "sanity check");
1750 // lookup native function entry point if it doesn't exist
1751 bool in_base_library;
1752 if (!m->has_native_function()) {
1753 NativeLookup::lookup(m, in_base_library, CHECK);
1754 }
1755 // make sure signature handler is installed
1756 SignatureHandlerLibrary::add(m);
1757 // The interpreter entry point checks the signature handler first,
1758 // before trying to fetch the native entry point and klass mirror.
1759 // We must set the signature handler last, so that multiple processors
1760 // preparing the same method will be sure to see non-null entry & mirror.
1761 IRT_END
1762
1763 #if defined(IA32) || defined(AMD64) || defined(ARM)
1764 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1765 if (src_address == dest_address) {
1766 return;
1767 }
1768 ResetNoHandleMark rnm; // In a LEAF entry.
1769 HandleMark hm;
1770 ResourceMark rm;
1771 frame fr = thread->last_frame();
1772 assert(fr.is_interpreted_frame(), "");
1773 jint bci = fr.interpreter_frame_bci();
1774 methodHandle mh(thread, fr.interpreter_frame_method());
1775 Bytecode_invoke invoke(mh, bci);
1776 ArgumentSizeComputer asc(invoke.signature());
1777 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1778 Copy::conjoint_jbytes(src_address, dest_address,
1779 size_of_arguments * Interpreter::stackElementSize);
1780 IRT_END
1781 #endif
1782
1783 #if INCLUDE_JVMTI
1784 // This is a support of the JVMTI PopFrame interface.
1785 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1786 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1787 // The member_name argument is a saved reference (in local#0) to the member_name.
1788 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1789 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1790 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1791 Method* method, address bcp))
1792 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1793 if (code != Bytecodes::_invokestatic) {
1794 return;
1795 }
1796 ConstantPool* cpool = method->constants();
1797 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1798 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1799 Symbol* mname = cpool->name_ref_at(cp_index);
1800
1801 if (MethodHandles::has_member_arg(cname, mname)) {
1802 oop member_name_oop = (oop) member_name;
1803 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1804 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1805 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1806 }
1807 thread->set_vm_result(member_name_oop);
1808 } else {
1809 thread->set_vm_result(NULL);
1810 }
1811 IRT_END
1812 #endif // INCLUDE_JVMTI
1813
1814 #ifndef PRODUCT
1815 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1816 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1817 // The generated code still uses call_VM because that will set up the frame pointer for
1818 // bcp and method.
1819 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1820 const frame f = thread->last_frame();
1821 assert(f.is_interpreted_frame(), "must be an interpreted frame");
1822 methodHandle mh(thread, f.interpreter_frame_method());
1823 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2);
1824 return preserve_this_value;
1825 IRT_END
1826 #endif // !PRODUCT