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_or_null(index);
373 if (field_k == NULL) {
374 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index),
375 Handle(THREAD, klass->class_loader()),
376 Handle(THREAD, klass->protection_domain()), true, CHECK);
377 assert(field_k != NULL, "Sanity check");
378 assert(field_k->access_flags().is_value_type(), "Value type expected");
379 klass->set_value_field_klass(index, field_k);
380 }
381 ValueKlass* field_vklass = ValueKlass::cast(field_k);
382 // allocate instance, because it is going to be assigned to a static field
383 // it must not be a buffered value
384 instanceOop res = field_vklass->allocate_instance(CHECK);
385 instanceHandle res_h(THREAD, res);
386 mirror_h()->obj_field_put(offset, res_h());
387 thread->set_vm_result(res_h());
388 IRT_END
389
390 IRT_ENTRY(void, InterpreterRuntime::qputfield(JavaThread* thread, oopDesc* obj, oopDesc* value, ConstantPoolCache* cp_cache))
391 Handle value_h(THREAD, value);
392 Handle obj_h(THREAD, obj);
393 assert(!obj_h()->klass()->is_value(), "obj must be an object");
394 assert(value_h()->klass()->is_value(), "value must be an value type");
395
396 int idx = ConstantPool::decode_cpcache_index(get_index_u2_cpcache(thread, Bytecodes::_putfield));
397 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(idx);
398
399 int index = cp_entry->field_index();
400 bool flatten = cp_entry->is_flatten();
401
402 InstanceKlass* klass = InstanceKlass::cast(cp_entry->f1_as_klass());
403 Klass* field_k = klass->get_value_field_klass(index);
404 ValueKlass* field_vklass = ValueKlass::cast(value->klass());
405 assert(field_k == field_vklass, "Field descriptor and argument must match");
406 if (flatten) {
407 // copy value
408 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
409 ((char*)(oopDesc*)obj_h()) + klass->field_offset(index), true, false);
410 } else {
411 if (Universe::heap()->is_in_reserved(value_h())) {
412 obj_h()->obj_field_put(klass->field_offset(index), value_h());
413 } else {
414 // allocate heap instance
415 instanceOop val = field_vklass->allocate_instance(CHECK);
416 instanceHandle res_h(THREAD, val);
417 // copy value
418 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
419 field_vklass->data_for_oop(res_h()), true, false);
420
421
422 obj_h()->obj_field_put(klass->field_offset(index), res_h());
423 }
424 }
425 IRT_END
426
427 IRT_ENTRY(void, InterpreterRuntime::qputstatic(JavaThread* thread, oopDesc* value, int offset, oopDesc* mirror))
428 instanceHandle value_h(THREAD, (instanceOop)value);
429 assert(value_h()->is_value(), "qputstatic only deals with value arguments");
430 if (Universe::heap()->is_in_reserved(value_h())) {
431 mirror->obj_field_put(offset, value_h());
432 } else {
433 // The argument is a buffered value, a copy must be created in the Java heap
434 // because a static field cannot point to a thread-local buffered value
435 ValueKlass* field_vklass = ValueKlass::cast(value_h()->klass());
436 Handle mirror_h(THREAD, mirror);
437 // allocate heap instance
438 instanceOop res = field_vklass->allocate_instance(CHECK);
439 assert(Universe::heap()->is_in_reserved(res), "Must be in the Java heap");
440 instanceHandle res_h(THREAD, res);
441 // copy value
442 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
443 field_vklass->data_for_oop(res), true, false);
444 // writing static field
445 mirror_h->obj_field_put(offset, res_h());
446 assert(mirror_h->obj_field(offset) != NULL,"Sanity check");
447 }
448 IRT_END
449
450 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
451 oop obj = oopFactory::new_typeArray(type, size, CHECK);
452 thread->set_vm_result(obj);
453 IRT_END
454
455
456 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
457 Klass* klass = pool->klass_at(index, CHECK);
458 if (klass->is_value()) { // Logically creates elements, ensure klass init
459 klass->initialize(CHECK);
460 }
461 arrayOop obj = oopFactory::new_array(klass, size, CHECK);
462 thread->set_vm_result(obj);
463 IRT_END
464
465 IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
466 Klass* klass = array->klass();
467 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
468
469 if (klass->is_objArray_klass()) {
470 thread->set_vm_result(((objArrayOop) array)->obj_at(index));
471 }
472 else {
473 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
474 ValueKlass* vklass = vaklass->element_klass();
475 arrayHandle ah(THREAD, array);
476 bool in_heap;
477 instanceOop value_holder = vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
478 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper());
479 vklass->value_store(src, vklass->data_for_oop(value_holder),
480 vaklass->element_byte_size(), in_heap, false);
481 thread->set_vm_result(value_holder);
482 }
483 IRT_END
484
485 IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, arrayOopDesc* array, int index, void* val))
486 Klass* klass = array->klass();
487 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
488
489 if (ArrayKlass::cast(klass)->element_klass() != ((oop)val)->klass()) {
490 THROW(vmSymbols::java_lang_ArrayStoreException());
491 }
492 if (klass->is_objArray_klass()) {
493 if(!Universe::heap()->is_in_reserved(val)) {
494 // A Java heap allocated copy must be made because an array cannot
495 // reference a thread-local buffered value
496 Handle val_h(THREAD, (oop)val);
497 ObjArrayKlass* aklass = ObjArrayKlass::cast(klass);
498 Klass* eklass = aklass->element_klass();
499 assert(eklass->is_value(), "Sanity check");
500 assert(eklass == ((oop)val)->klass(), "Sanity check");
501 ValueKlass* vklass = ValueKlass::cast(eklass);
502 // allocate heap instance
503 instanceOop res = vklass->allocate_instance(CHECK);
504 Handle res_h(THREAD, res);
505 // copy value
506 vklass->value_store(((char*)(oopDesc*)val_h()) + vklass->first_field_offset(),
507 ((char*)(oopDesc*)res_h()) + vklass->first_field_offset(),true, false);
508 val = res_h();
509 }
510 ((objArrayOop) array)->obj_at_put(index, (oop)val);
511 } else {
512 valueArrayOop varray = (valueArrayOop)array;
513 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
514 ValueKlass* vklass = vaklass->element_klass();
515 const int lh = vaklass->layout_helper();
516 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
517 vaklass->element_byte_size(), true, false);
518 }
519 IRT_END
520
521 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
522 // We may want to pass in more arguments - could make this slightly faster
523 ConstantPool* constants = method(thread)->constants();
524 int i = get_index_u2(thread, Bytecodes::_multianewarray);
525 Klass* klass = constants->klass_at(i, CHECK);
526 int nof_dims = number_of_dimensions(thread);
527 assert(klass->is_klass(), "not a class");
528 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
529
530 if (klass->is_value()) { // Logically creates elements, ensure klass init
531 klass->initialize(CHECK);
532 }
533
534 // We must create an array of jints to pass to multi_allocate.
535 ResourceMark rm(thread);
536 const int small_dims = 10;
537 jint dim_array[small_dims];
538 jint *dims = &dim_array[0];
539 if (nof_dims > small_dims) {
540 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
541 }
542 for (int index = 0; index < nof_dims; index++) {
543 // offset from first_size_address is addressed as local[index]
544 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
545 dims[index] = first_size_address[n];
546 }
547 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
548 thread->set_vm_result(obj);
549 IRT_END
550
551 IRT_ENTRY(void, InterpreterRuntime::recycle_vtbuffer(JavaThread* thread))
552 VTBuffer::recycle_vtbuffer(thread, last_frame(thread));
553 IRT_END
554
555 IRT_ENTRY(void, InterpreterRuntime::recycle_buffered_values(JavaThread* thread))
556 frame f = thread->last_frame();
557 assert(f.is_interpreted_frame(), "recycling can only be triggered from interpreted frames");
558 VTBuffer::recycle_vt_in_frame(thread, &f);
559 IRT_END
560
561 IRT_ENTRY(void, InterpreterRuntime::fix_frame_vt_alloc_ptr(JavaThread* thread))
562 frame f = thread->last_frame();
563 VTBuffer::fix_frame_vt_alloc_ptr(f, VTBufferChunk::chunk(thread->vt_alloc_ptr()));
564 IRT_END
565
566 IRT_ENTRY(void, InterpreterRuntime::return_value(JavaThread* thread, oopDesc* obj))
567 if (Universe::heap()->is_in_reserved(obj)) {
568 thread->set_vm_result(obj);
569 return;
570 }
571 assert(obj->klass()->is_value(), "Sanity check");
572 ValueKlass* vk = ValueKlass::cast(obj->klass());
573 RegisterMap reg_map(thread, false);
574 frame current_frame = last_frame(thread);
575 frame caller_frame = current_frame.sender(®_map);
576 if (!caller_frame.is_interpreted_frame()) {
577 // caller is not an interpreted frame, creating a new value in Java heap
578 Handle obj_h(THREAD, obj);
579 instanceOop res = vk->allocate_instance(CHECK);
580 Handle res_h(THREAD, res);
581 // copy value
582 vk->value_store(vk->data_for_oop(obj_h()),
583 vk->data_for_oop(res_h()), true, false);
584 thread->set_vm_result(res_h());
585 return;
586 } else {
587 oop dest = VTBuffer::relocate_return_value(thread, current_frame, obj);
588 thread->set_vm_result(dest);
589 }
590 IRT_END
591
592 IRT_ENTRY(void, InterpreterRuntime::check_areturn(JavaThread* thread, oopDesc* obj))
593 if (obj != NULL) {
594 Klass* k = obj->klass();
595 if (k->is_value()) {
596 ResourceMark rm(thread);
597 tty->print_cr("areturn used on a value from %s", k->name()->as_C_string());
598 }
599 assert(!k->is_value(), "areturn should never be used on values");
600 }
601 thread->set_vm_result(obj);
602 IRT_END
603
604 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
605 assert(oopDesc::is_oop(obj), "must be a valid oop");
606 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
607 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
608 IRT_END
609
610
611 // Quicken instance-of and check-cast bytecodes
612 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
613 // Force resolving; quicken the bytecode
614 int which = get_index_u2(thread, Bytecodes::_checkcast);
615 ConstantPool* cpool = method(thread)->constants();
616 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
617 // program we might have seen an unquick'd bytecode in the interpreter but have another
618 // thread quicken the bytecode before we get here.
619 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
620 Klass* klass = cpool->klass_at(which, CHECK);
621 thread->set_vm_result_2(klass);
622 IRT_END
623
624
625 //------------------------------------------------------------------------------------------------------------------------
626 // Exceptions
627
628 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
629 const methodHandle& trap_method, int trap_bci, TRAPS) {
630 if (trap_method.not_null()) {
631 MethodData* trap_mdo = trap_method->method_data();
632 if (trap_mdo == NULL) {
633 Method::build_interpreter_method_data(trap_method, THREAD);
634 if (HAS_PENDING_EXCEPTION) {
635 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
636 "we expect only an OOM error here");
637 CLEAR_PENDING_EXCEPTION;
638 }
639 trap_mdo = trap_method->method_data();
640 // and fall through...
641 }
642 if (trap_mdo != NULL) {
643 // Update per-method count of trap events. The interpreter
644 // is updating the MDO to simulate the effect of compiler traps.
645 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
646 }
647 }
648 }
649
650 // Assume the compiler is (or will be) interested in this event.
651 // If necessary, create an MDO to hold the information, and record it.
652 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
653 assert(ProfileTraps, "call me only if profiling");
654 methodHandle trap_method(thread, method(thread));
655 int trap_bci = trap_method->bci_from(bcp(thread));
656 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
657 }
658
659 #ifdef CC_INTERP
660 // As legacy note_trap, but we have more arguments.
661 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
662 methodHandle trap_method(method);
663 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
664 IRT_END
665
666 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
667 // for each exception.
668 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
669 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
670 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
671 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
672 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
673 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
674 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
675 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
676 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
677 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
678 #endif // CC_INTERP
679
680
681 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
682 // get klass
683 InstanceKlass* klass = InstanceKlass::cast(k);
684 assert(klass->is_initialized(),
685 "this klass should have been initialized during VM initialization");
686 // create instance - do not call constructor since we may have no
687 // (java) stack space left (should assert constructor is empty)
688 Handle exception;
689 oop exception_oop = klass->allocate_instance(CHECK_(exception));
690 exception = Handle(THREAD, exception_oop);
691 if (StackTraceInThrowable) {
692 java_lang_Throwable::fill_in_stack_trace(exception);
693 }
694 return exception;
695 }
696
697 // Special handling for stack overflow: since we don't have any (java) stack
698 // space left we use the pre-allocated & pre-initialized StackOverflowError
699 // klass to create an stack overflow error instance. We do not call its
700 // constructor for the same reason (it is empty, anyway).
701 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
702 Handle exception = get_preinitialized_exception(
703 SystemDictionary::StackOverflowError_klass(),
704 CHECK);
705 // Increment counter for hs_err file reporting
706 Atomic::inc(&Exceptions::_stack_overflow_errors);
707 THROW_HANDLE(exception);
708 IRT_END
709
710 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
711 Handle exception = get_preinitialized_exception(
712 SystemDictionary::StackOverflowError_klass(),
713 CHECK);
714 java_lang_Throwable::set_message(exception(),
715 Universe::delayed_stack_overflow_error_message());
716 // Increment counter for hs_err file reporting
717 Atomic::inc(&Exceptions::_stack_overflow_errors);
718 THROW_HANDLE(exception);
719 IRT_END
720
721 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
722 // lookup exception klass
723 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
724 if (ProfileTraps) {
725 if (s == vmSymbols::java_lang_ArithmeticException()) {
726 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
727 } else if (s == vmSymbols::java_lang_NullPointerException()) {
728 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
729 }
730 }
731 // create exception
732 Handle exception = Exceptions::new_exception(thread, s, message);
733 thread->set_vm_result(exception());
734 IRT_END
735
736
737 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
738 ResourceMark rm(thread);
739 const char* klass_name = obj->klass()->external_name();
740 // lookup exception klass
741 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
742 if (ProfileTraps) {
743 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
744 }
745 // create exception, with klass name as detail message
746 Handle exception = Exceptions::new_exception(thread, s, klass_name);
747 thread->set_vm_result(exception());
748 IRT_END
749
750
751 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
752 char message[jintAsStringSize];
753 // lookup exception klass
754 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
755 if (ProfileTraps) {
756 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
757 }
758 // create exception
759 sprintf(message, "%d", index);
760 THROW_MSG(s, message);
761 IRT_END
762
763 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
764 JavaThread* thread, oopDesc* obj))
765
766 ResourceMark rm(thread);
767 char* message = SharedRuntime::generate_class_cast_message(
768 thread, obj->klass());
769
770 if (ProfileTraps) {
771 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
772 }
773
774 // create exception
775 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
776 IRT_END
777
778 // exception_handler_for_exception(...) returns the continuation address,
779 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
780 // The exception oop is returned to make sure it is preserved over GC (it
781 // is only on the stack if the exception was thrown explicitly via athrow).
782 // During this operation, the expression stack contains the values for the
783 // bci where the exception happened. If the exception was propagated back
784 // from a call, the expression stack contains the values for the bci at the
785 // invoke w/o arguments (i.e., as if one were inside the call).
786 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
787
788 Handle h_exception(thread, exception);
789 methodHandle h_method (thread, method(thread));
790 constantPoolHandle h_constants(thread, h_method->constants());
791 bool should_repeat;
792 int handler_bci;
793 int current_bci = bci(thread);
794
795 if (thread->frames_to_pop_failed_realloc() > 0) {
796 // Allocation of scalar replaced object used in this frame
797 // failed. Unconditionally pop the frame.
798 thread->dec_frames_to_pop_failed_realloc();
799 thread->set_vm_result(h_exception());
800 // If the method is synchronized we already unlocked the monitor
801 // during deoptimization so the interpreter needs to skip it when
802 // the frame is popped.
803 thread->set_do_not_unlock_if_synchronized(true);
804 #ifdef CC_INTERP
805 return (address) -1;
806 #else
807 return Interpreter::remove_activation_entry();
808 #endif
809 }
810
811 // Need to do this check first since when _do_not_unlock_if_synchronized
812 // is set, we don't want to trigger any classloading which may make calls
813 // into java, or surprisingly find a matching exception handler for bci 0
814 // since at this moment the method hasn't been "officially" entered yet.
815 if (thread->do_not_unlock_if_synchronized()) {
816 ResourceMark rm;
817 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
818 thread->set_vm_result(exception);
819 #ifdef CC_INTERP
820 return (address) -1;
821 #else
822 return Interpreter::remove_activation_entry();
823 #endif
824 }
825
826 do {
827 should_repeat = false;
828
829 // assertions
830 #ifdef ASSERT
831 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
832 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
833 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
834 if (ExitVMOnVerifyError) vm_exit(-1);
835 ShouldNotReachHere();
836 }
837 #endif
838
839 // tracing
840 if (log_is_enabled(Info, exceptions)) {
841 ResourceMark rm(thread);
842 stringStream tempst;
843 tempst.print("interpreter method <%s>\n"
844 " at bci %d for thread " INTPTR_FORMAT,
845 h_method->print_value_string(), current_bci, p2i(thread));
846 Exceptions::log_exception(h_exception, tempst);
847 }
848 // Don't go paging in something which won't be used.
849 // else if (extable->length() == 0) {
850 // // disabled for now - interpreter is not using shortcut yet
851 // // (shortcut is not to call runtime if we have no exception handlers)
852 // // warning("performance bug: should not call runtime if method has no exception handlers");
853 // }
854 // for AbortVMOnException flag
855 Exceptions::debug_check_abort(h_exception);
856
857 // exception handler lookup
858 Klass* klass = h_exception->klass();
859 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
860 if (HAS_PENDING_EXCEPTION) {
861 // We threw an exception while trying to find the exception handler.
862 // Transfer the new exception to the exception handle which will
863 // be set into thread local storage, and do another lookup for an
864 // exception handler for this exception, this time starting at the
865 // BCI of the exception handler which caused the exception to be
866 // thrown (bug 4307310).
867 h_exception = Handle(THREAD, PENDING_EXCEPTION);
868 CLEAR_PENDING_EXCEPTION;
869 if (handler_bci >= 0) {
870 current_bci = handler_bci;
871 should_repeat = true;
872 }
873 }
874 } while (should_repeat == true);
875
876 #if INCLUDE_JVMCI
877 if (EnableJVMCI && h_method->method_data() != NULL) {
878 ResourceMark rm(thread);
879 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
880 if (pdata != NULL && pdata->is_BitData()) {
881 BitData* bit_data = (BitData*) pdata;
882 bit_data->set_exception_seen();
883 }
884 }
885 #endif
886
887 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
888 // time throw or a stack unwinding throw and accordingly notify the debugger
889 if (JvmtiExport::can_post_on_exceptions()) {
890 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
891 }
892
893 #ifdef CC_INTERP
894 address continuation = (address)(intptr_t) handler_bci;
895 #else
896 address continuation = NULL;
897 #endif
898 address handler_pc = NULL;
899 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
900 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
901 // handler in this method, or (b) after a stack overflow there is not yet
902 // enough stack space available to reprotect the stack.
903 #ifndef CC_INTERP
904 continuation = Interpreter::remove_activation_entry();
905 #endif
906 #if COMPILER2_OR_JVMCI
907 // Count this for compilation purposes
908 h_method->interpreter_throwout_increment(THREAD);
909 #endif
910 } else {
911 // handler in this method => change bci/bcp to handler bci/bcp and continue there
912 handler_pc = h_method->code_base() + handler_bci;
913 #ifndef CC_INTERP
914 set_bcp_and_mdp(handler_pc, thread);
915 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
916 #endif
917 }
918 // notify debugger of an exception catch
919 // (this is good for exceptions caught in native methods as well)
920 if (JvmtiExport::can_post_on_exceptions()) {
921 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
922 }
923
924 thread->set_vm_result(h_exception());
925 return continuation;
926 IRT_END
927
928
929 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
930 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
931 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
932 IRT_END
933
934
935 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
936 THROW(vmSymbols::java_lang_AbstractMethodError());
937 IRT_END
938
939
940 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
941 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
942 IRT_END
943
944
945 //------------------------------------------------------------------------------------------------------------------------
946 // Fields
947 //
948
949 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
950 Thread* THREAD = thread;
951 // resolve field
952 fieldDescriptor info;
953 constantPoolHandle pool(thread, method(thread)->constants());
954 methodHandle m(thread, method(thread));
955 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
956 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_vwithfield);
957 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
958 bool is_value = bytecode == Bytecodes::_vwithfield;
959
960 {
961 JvmtiHideSingleStepping jhss(thread);
962 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
963 m, bytecode, CHECK);
964 } // end JvmtiHideSingleStepping
965
966 // check if link resolution caused cpCache to be updated
967 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
968 if (cp_cache_entry->is_resolved(bytecode)) return;
969
970 // compute auxiliary field attributes
971 TosState state = as_TosState(info.field_type());
972
973 // Resolution of put instructions on final fields is delayed. That is required so that
974 // exceptions are thrown at the correct place (when the instruction is actually invoked).
975 // If we do not resolve an instruction in the current pass, leaving the put_code
976 // set to zero will cause the next put instruction to the same field to reresolve.
977
978 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
979 // to final instance fields with updates originating from a method different than <init>)
980 // is inhibited. A putfield instruction targeting an instance final field must throw
981 // an IllegalAccessError if the instruction is not in an instance
982 // initializer method <init>. If resolution were not inhibited, a putfield
983 // in an initializer method could be resolved in the initializer. Subsequent
984 // putfield instructions to the same field would then use cached information.
985 // As a result, those instructions would not pass through the VM. That is,
986 // checks in resolve_field_access() would not be executed for those instructions
987 // and the required IllegalAccessError would not be thrown.
988 //
989 // Also, we need to delay resolving getstatic and putstatic instructions until the
990 // class is initialized. This is required so that access to the static
991 // field will call the initialization function every time until the class
992 // is completely initialized ala. in 2.17.5 in JVM Specification.
993 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
994 bool uninitialized_static = is_static && !klass->is_initialized();
995 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
996 info.has_initialized_final_update();
997 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
998
999 Bytecodes::Code get_code = (Bytecodes::Code)0;
1000 Bytecodes::Code put_code = (Bytecodes::Code)0;
1001 if (!uninitialized_static) {
1002 if (is_static) {
1003 get_code = Bytecodes::_getstatic;
1004 } else {
1005 get_code = Bytecodes::_getfield;
1006 }
1007 if (is_put && is_value) {
1008 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_vwithfield);
1009 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
1010 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
1011 }
1012 }
1013
1014 cp_cache_entry->set_field(
1015 get_code,
1016 put_code,
1017 info.field_holder(),
1018 info.index(),
1019 info.offset(),
1020 state,
1021 info.access_flags().is_final(),
1022 info.access_flags().is_volatile(),
1023 info.is_flatten(),
1024 pool->pool_holder()
1025 );
1026 }
1027
1028
1029 //------------------------------------------------------------------------------------------------------------------------
1030 // Synchronization
1031 //
1032 // The interpreter's synchronization code is factored out so that it can
1033 // be shared by method invocation and synchronized blocks.
1034 //%note synchronization_3
1035
1036 //%note monitor_1
1037 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
1038 #ifdef ASSERT
1039 thread->last_frame().interpreter_frame_verify_monitor(elem);
1040 #endif
1041 if (PrintBiasedLockingStatistics) {
1042 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
1043 }
1044 Handle h_obj(thread, elem->obj());
1045 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1046 "must be NULL or an object");
1047 if (UseBiasedLocking) {
1048 // Retry fast entry if bias is revoked to avoid unnecessary inflation
1049 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
1050 } else {
1051 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
1052 }
1053 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
1054 "must be NULL or an object");
1055 #ifdef ASSERT
1056 thread->last_frame().interpreter_frame_verify_monitor(elem);
1057 #endif
1058 IRT_END
1059
1060
1061 //%note monitor_1
1062 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
1063 #ifdef ASSERT
1064 thread->last_frame().interpreter_frame_verify_monitor(elem);
1065 #endif
1066 Handle h_obj(thread, elem->obj());
1067 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1068 "must be NULL or an object");
1069 if (elem == NULL || h_obj()->is_unlocked()) {
1070 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1071 }
1072 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
1073 // Free entry. This must be done here, since a pending exception might be installed on
1074 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
1075 elem->set_obj(NULL);
1076 #ifdef ASSERT
1077 thread->last_frame().interpreter_frame_verify_monitor(elem);
1078 #endif
1079 IRT_END
1080
1081
1082 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
1083 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1084 IRT_END
1085
1086
1087 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
1088 // Returns an illegal exception to install into the current thread. The
1089 // pending_exception flag is cleared so normal exception handling does not
1090 // trigger. Any current installed exception will be overwritten. This
1091 // method will be called during an exception unwind.
1092
1093 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1094 Handle exception(thread, thread->vm_result());
1095 assert(exception() != NULL, "vm result should be set");
1096 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1097 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
1098 exception = get_preinitialized_exception(
1099 SystemDictionary::IllegalMonitorStateException_klass(),
1100 CATCH);
1101 }
1102 thread->set_vm_result(exception());
1103 IRT_END
1104
1105
1106 //------------------------------------------------------------------------------------------------------------------------
1107 // Invokes
1108
1109 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
1110 return method->orig_bytecode_at(method->bci_from(bcp));
1111 IRT_END
1112
1113 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
1114 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1115 IRT_END
1116
1117 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
1118 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
1119 IRT_END
1120
1121 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
1122 Thread* THREAD = thread;
1123 // extract receiver from the outgoing argument list if necessary
1124 Handle receiver(thread, NULL);
1125 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1126 bytecode == Bytecodes::_invokespecial) {
1127 ResourceMark rm(thread);
1128 methodHandle m (thread, method(thread));
1129 Bytecode_invoke call(m, bci(thread));
1130 Symbol* signature = call.signature();
1131 receiver = Handle(thread,
1132 thread->last_frame().interpreter_callee_receiver(signature));
1133 assert(Universe::heap()->is_in_reserved_or_null(receiver())
1134 || VTBuffer::is_in_vt_buffer(receiver()),
1135 "sanity check");
1136 assert(receiver.is_null() ||
1137 !Universe::heap()->is_in_reserved(receiver->klass()),
1138 "sanity check");
1139 }
1140
1141 // resolve method
1142 CallInfo info;
1143 constantPoolHandle pool(thread, method(thread)->constants());
1144
1145 {
1146 JvmtiHideSingleStepping jhss(thread);
1147 LinkResolver::resolve_invoke(info, receiver, pool,
1148 get_index_u2_cpcache(thread, bytecode), bytecode,
1149 CHECK);
1150 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
1151 int retry_count = 0;
1152 while (info.resolved_method()->is_old()) {
1153 // It is very unlikely that method is redefined more than 100 times
1154 // in the middle of resolve. If it is looping here more than 100 times
1155 // means then there could be a bug here.
1156 guarantee((retry_count++ < 100),
1157 "Could not resolve to latest version of redefined method");
1158 // method is redefined in the middle of resolve so re-try.
1159 LinkResolver::resolve_invoke(info, receiver, pool,
1160 get_index_u2_cpcache(thread, bytecode), bytecode,
1161 CHECK);
1162 }
1163 }
1164 } // end JvmtiHideSingleStepping
1165
1166 // check if link resolution caused cpCache to be updated
1167 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
1168 if (cp_cache_entry->is_resolved(bytecode)) return;
1169
1170 #ifdef ASSERT
1171 if (bytecode == Bytecodes::_invokeinterface) {
1172 if (info.resolved_method()->method_holder() ==
1173 SystemDictionary::Object_klass()) {
1174 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1175 // (see also CallInfo::set_interface for details)
1176 assert(info.call_kind() == CallInfo::vtable_call ||
1177 info.call_kind() == CallInfo::direct_call, "");
1178 methodHandle rm = info.resolved_method();
1179 assert(rm->is_final() || info.has_vtable_index(),
1180 "should have been set already");
1181 } else if (!info.resolved_method()->has_itable_index()) {
1182 // Resolved something like CharSequence.toString. Use vtable not itable.
1183 assert(info.call_kind() != CallInfo::itable_call, "");
1184 } else {
1185 // Setup itable entry
1186 assert(info.call_kind() == CallInfo::itable_call, "");
1187 int index = info.resolved_method()->itable_index();
1188 assert(info.itable_index() == index, "");
1189 }
1190 } else if (bytecode == Bytecodes::_invokespecial) {
1191 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1192 } else {
1193 assert(info.call_kind() == CallInfo::direct_call ||
1194 info.call_kind() == CallInfo::vtable_call, "");
1195 }
1196 #endif
1197 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
1198 // it is not an interface. The receiver for invokespecial calls within interface
1199 // methods must be checked for every call.
1200 InstanceKlass* sender = pool->pool_holder();
1201 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1202
1203 switch (info.call_kind()) {
1204 case CallInfo::direct_call:
1205 cp_cache_entry->set_direct_call(
1206 bytecode,
1207 info.resolved_method(),
1208 sender->is_interface());
1209 break;
1210 case CallInfo::vtable_call:
1211 cp_cache_entry->set_vtable_call(
1212 bytecode,
1213 info.resolved_method(),
1214 info.vtable_index());
1215 break;
1216 case CallInfo::itable_call:
1217 cp_cache_entry->set_itable_call(
1218 bytecode,
1219 info.resolved_method(),
1220 info.itable_index());
1221 break;
1222 default: ShouldNotReachHere();
1223 }
1224 }
1225
1226
1227 // First time execution: Resolve symbols, create a permanent MethodType object.
1228 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1229 Thread* THREAD = thread;
1230 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1231
1232 // resolve method
1233 CallInfo info;
1234 constantPoolHandle pool(thread, method(thread)->constants());
1235 {
1236 JvmtiHideSingleStepping jhss(thread);
1237 LinkResolver::resolve_invoke(info, Handle(), pool,
1238 get_index_u2_cpcache(thread, bytecode), bytecode,
1239 CHECK);
1240 } // end JvmtiHideSingleStepping
1241
1242 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
1243 cp_cache_entry->set_method_handle(pool, info);
1244 }
1245
1246 // First time execution: Resolve symbols, create a permanent CallSite object.
1247 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1248 Thread* THREAD = thread;
1249 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1250
1251 //TO DO: consider passing BCI to Java.
1252 // int caller_bci = method(thread)->bci_from(bcp(thread));
1253
1254 // resolve method
1255 CallInfo info;
1256 constantPoolHandle pool(thread, method(thread)->constants());
1257 int index = get_index_u4(thread, bytecode);
1258 {
1259 JvmtiHideSingleStepping jhss(thread);
1260 LinkResolver::resolve_invoke(info, Handle(), pool,
1261 index, bytecode, CHECK);
1262 } // end JvmtiHideSingleStepping
1263
1264 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1265 cp_cache_entry->set_dynamic_call(pool, info);
1266 }
1267
1268 // This function is the interface to the assembly code. It returns the resolved
1269 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1270 // This function will check for redefinition!
1271 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1272 switch (bytecode) {
1273 case Bytecodes::_getstatic:
1274 case Bytecodes::_putstatic:
1275 case Bytecodes::_getfield:
1276 case Bytecodes::_putfield:
1277 case Bytecodes::_vwithfield:
1278 resolve_get_put(thread, bytecode);
1279 break;
1280 case Bytecodes::_invokevirtual:
1281 case Bytecodes::_invokespecial:
1282 case Bytecodes::_invokestatic:
1283 case Bytecodes::_invokeinterface:
1284 resolve_invoke(thread, bytecode);
1285 break;
1286 case Bytecodes::_invokehandle:
1287 resolve_invokehandle(thread);
1288 break;
1289 case Bytecodes::_invokedynamic:
1290 resolve_invokedynamic(thread);
1291 break;
1292 default:
1293 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1294 break;
1295 }
1296 }
1297 IRT_END
1298
1299 //------------------------------------------------------------------------------------------------------------------------
1300 // Miscellaneous
1301
1302
1303 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1304 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1305 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1306 if (branch_bcp != NULL && nm != NULL) {
1307 // This was a successful request for an OSR nmethod. Because
1308 // frequency_counter_overflow_inner ends with a safepoint check,
1309 // nm could have been unloaded so look it up again. It's unsafe
1310 // to examine nm directly since it might have been freed and used
1311 // for something else.
1312 frame fr = thread->last_frame();
1313 Method* method = fr.interpreter_frame_method();
1314 int bci = method->bci_from(fr.interpreter_frame_bcp());
1315 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1316 }
1317 #ifndef PRODUCT
1318 if (TraceOnStackReplacement) {
1319 if (nm != NULL) {
1320 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1321 nm->print();
1322 }
1323 }
1324 #endif
1325 return nm;
1326 }
1327
1328 IRT_ENTRY(nmethod*,
1329 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1330 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1331 // flag, in case this method triggers classloading which will call into Java.
1332 UnlockFlagSaver fs(thread);
1333
1334 frame fr = thread->last_frame();
1335 assert(fr.is_interpreted_frame(), "must come from interpreter");
1336 methodHandle method(thread, fr.interpreter_frame_method());
1337 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1338 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
1339
1340 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1341 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1342 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1343
1344 if (osr_nm != NULL) {
1345 // We may need to do on-stack replacement which requires that no
1346 // monitors in the activation are biased because their
1347 // BasicObjectLocks will need to migrate during OSR. Force
1348 // unbiasing of all monitors in the activation now (even though
1349 // the OSR nmethod might be invalidated) because we don't have a
1350 // safepoint opportunity later once the migration begins.
1351 if (UseBiasedLocking) {
1352 ResourceMark rm;
1353 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1354 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
1355 kptr < fr.interpreter_frame_monitor_begin();
1356 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
1357 if( kptr->obj() != NULL ) {
1358 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1359 }
1360 }
1361 BiasedLocking::revoke(objects_to_revoke);
1362 }
1363 }
1364 return osr_nm;
1365 IRT_END
1366
1367 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1368 assert(ProfileInterpreter, "must be profiling interpreter");
1369 int bci = method->bci_from(cur_bcp);
1370 MethodData* mdo = method->method_data();
1371 if (mdo == NULL) return 0;
1372 return mdo->bci_to_di(bci);
1373 IRT_END
1374
1375 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1376 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1377 // flag, in case this method triggers classloading which will call into Java.
1378 UnlockFlagSaver fs(thread);
1379
1380 assert(ProfileInterpreter, "must be profiling interpreter");
1381 frame fr = thread->last_frame();
1382 assert(fr.is_interpreted_frame(), "must come from interpreter");
1383 methodHandle method(thread, fr.interpreter_frame_method());
1384 Method::build_interpreter_method_data(method, THREAD);
1385 if (HAS_PENDING_EXCEPTION) {
1386 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1387 CLEAR_PENDING_EXCEPTION;
1388 // and fall through...
1389 }
1390 IRT_END
1391
1392
1393 #ifdef ASSERT
1394 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1395 assert(ProfileInterpreter, "must be profiling interpreter");
1396
1397 MethodData* mdo = method->method_data();
1398 assert(mdo != NULL, "must not be null");
1399
1400 int bci = method->bci_from(bcp);
1401
1402 address mdp2 = mdo->bci_to_dp(bci);
1403 if (mdp != mdp2) {
1404 ResourceMark rm;
1405 ResetNoHandleMark rnm; // In a LEAF entry.
1406 HandleMark hm;
1407 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1408 int current_di = mdo->dp_to_di(mdp);
1409 int expected_di = mdo->dp_to_di(mdp2);
1410 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1411 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1412 int approx_bci = -1;
1413 if (current_di >= 0) {
1414 approx_bci = mdo->data_at(current_di)->bci();
1415 }
1416 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1417 mdo->print_on(tty);
1418 method->print_codes();
1419 }
1420 assert(mdp == mdp2, "wrong mdp");
1421 IRT_END
1422 #endif // ASSERT
1423
1424 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1425 assert(ProfileInterpreter, "must be profiling interpreter");
1426 ResourceMark rm(thread);
1427 HandleMark hm(thread);
1428 frame fr = thread->last_frame();
1429 assert(fr.is_interpreted_frame(), "must come from interpreter");
1430 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1431
1432 // Grab a lock to ensure atomic access to setting the return bci and
1433 // the displacement. This can block and GC, invalidating all naked oops.
1434 MutexLocker ml(RetData_lock);
1435
1436 // ProfileData is essentially a wrapper around a derived oop, so we
1437 // need to take the lock before making any ProfileData structures.
1438 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1439 guarantee(data != NULL, "profile data must be valid");
1440 RetData* rdata = data->as_RetData();
1441 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1442 fr.interpreter_frame_set_mdp(new_mdp);
1443 IRT_END
1444
1445 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1446 MethodCounters* mcs = Method::build_method_counters(m, thread);
1447 if (HAS_PENDING_EXCEPTION) {
1448 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1449 CLEAR_PENDING_EXCEPTION;
1450 }
1451 return mcs;
1452 IRT_END
1453
1454
1455 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1456 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1457 // stack traversal automatically takes care of preserving arguments for invoke, so
1458 // this is no longer needed.
1459
1460 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1461 // if this is called during a safepoint
1462
1463 if (JvmtiExport::should_post_single_step()) {
1464 // We are called during regular safepoints and when the VM is
1465 // single stepping. If any thread is marked for single stepping,
1466 // then we may have JVMTI work to do.
1467 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1468 }
1469 IRT_END
1470
1471 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1472 ConstantPoolCacheEntry *cp_entry))
1473
1474 // check the access_flags for the field in the klass
1475
1476 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1477 int index = cp_entry->field_index();
1478 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1479
1480 bool is_static = (obj == NULL);
1481 HandleMark hm(thread);
1482
1483 Handle h_obj;
1484 if (!is_static) {
1485 // non-static field accessors have an object, but we need a handle
1486 h_obj = Handle(thread, obj);
1487 }
1488 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1489 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1490 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), cp_entry_f1, h_obj, fid);
1491 IRT_END
1492
1493 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1494 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1495
1496 Klass* k = cp_entry->f1_as_klass();
1497
1498 // check the access_flags for the field in the klass
1499 InstanceKlass* ik = InstanceKlass::cast(k);
1500 int index = cp_entry->field_index();
1501 // bail out if field modifications are not watched
1502 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1503
1504 char sig_type = '\0';
1505
1506 switch(cp_entry->flag_state()) {
1507 case btos: sig_type = 'B'; break;
1508 case ztos: sig_type = 'Z'; break;
1509 case ctos: sig_type = 'C'; break;
1510 case stos: sig_type = 'S'; break;
1511 case itos: sig_type = 'I'; break;
1512 case ftos: sig_type = 'F'; break;
1513 case atos: sig_type = 'L'; break;
1514 case ltos: sig_type = 'J'; break;
1515 case dtos: sig_type = 'D'; break;
1516 default: ShouldNotReachHere(); return;
1517 }
1518 bool is_static = (obj == NULL);
1519
1520 HandleMark hm(thread);
1521 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1522 jvalue fvalue;
1523 #ifdef _LP64
1524 fvalue = *value;
1525 #else
1526 // Long/double values are stored unaligned and also noncontiguously with
1527 // tagged stacks. We can't just do a simple assignment even in the non-
1528 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1529 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1530 // We assume that the two halves of longs/doubles are stored in interpreter
1531 // stack slots in platform-endian order.
1532 jlong_accessor u;
1533 jint* newval = (jint*)value;
1534 u.words[0] = newval[0];
1535 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1536 fvalue.j = u.long_value;
1537 #endif // _LP64
1538
1539 Handle h_obj;
1540 if (!is_static) {
1541 // non-static field accessors have an object, but we need a handle
1542 h_obj = Handle(thread, obj);
1543 }
1544
1545 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), ik, h_obj,
1546 fid, sig_type, &fvalue);
1547 IRT_END
1548
1549 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1550 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1551 IRT_END
1552
1553
1554 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1555 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1556 IRT_END
1557
1558 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1559 {
1560 return (Interpreter::contains(pc) ? 1 : 0);
1561 }
1562 IRT_END
1563
1564
1565 // Implementation of SignatureHandlerLibrary
1566
1567 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1568 // Dummy definition (else normalization method is defined in CPU
1569 // dependant code)
1570 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1571 return fingerprint;
1572 }
1573 #endif
1574
1575 address SignatureHandlerLibrary::set_handler_blob() {
1576 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1577 if (handler_blob == NULL) {
1578 return NULL;
1579 }
1580 address handler = handler_blob->code_begin();
1581 _handler_blob = handler_blob;
1582 _handler = handler;
1583 return handler;
1584 }
1585
1586 void SignatureHandlerLibrary::initialize() {
1587 if (_fingerprints != NULL) {
1588 return;
1589 }
1590 if (set_handler_blob() == NULL) {
1591 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1592 }
1593
1594 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1595 SignatureHandlerLibrary::buffer_size);
1596 _buffer = bb->code_begin();
1597
1598 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1599 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1600 }
1601
1602 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1603 address handler = _handler;
1604 int insts_size = buffer->pure_insts_size();
1605 if (handler + insts_size > _handler_blob->code_end()) {
1606 // get a new handler blob
1607 handler = set_handler_blob();
1608 }
1609 if (handler != NULL) {
1610 memcpy(handler, buffer->insts_begin(), insts_size);
1611 pd_set_handler(handler);
1612 ICache::invalidate_range(handler, insts_size);
1613 _handler = handler + insts_size;
1614 }
1615 return handler;
1616 }
1617
1618 void SignatureHandlerLibrary::add(const methodHandle& method) {
1619 if (method->signature_handler() == NULL) {
1620 // use slow signature handler if we can't do better
1621 int handler_index = -1;
1622 // check if we can use customized (fast) signature handler
1623 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1624 // use customized signature handler
1625 MutexLocker mu(SignatureHandlerLibrary_lock);
1626 // make sure data structure is initialized
1627 initialize();
1628 // lookup method signature's fingerprint
1629 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1630 // allow CPU dependant code to optimize the fingerprints for the fast handler
1631 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1632 handler_index = _fingerprints->find(fingerprint);
1633 // create handler if necessary
1634 if (handler_index < 0) {
1635 ResourceMark rm;
1636 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1637 CodeBuffer buffer((address)(_buffer + align_offset),
1638 SignatureHandlerLibrary::buffer_size - align_offset);
1639 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1640 // copy into code heap
1641 address handler = set_handler(&buffer);
1642 if (handler == NULL) {
1643 // use slow signature handler (without memorizing it in the fingerprints)
1644 } else {
1645 // debugging suppport
1646 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1647 ttyLocker ttyl;
1648 tty->cr();
1649 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1650 _handlers->length(),
1651 (method->is_static() ? "static" : "receiver"),
1652 method->name_and_sig_as_C_string(),
1653 fingerprint,
1654 buffer.insts_size());
1655 if (buffer.insts_size() > 0) {
1656 Disassembler::decode(handler, handler + buffer.insts_size());
1657 }
1658 #ifndef PRODUCT
1659 address rh_begin = Interpreter::result_handler(method()->result_type());
1660 if (CodeCache::contains(rh_begin)) {
1661 // else it might be special platform dependent values
1662 tty->print_cr(" --- associated result handler ---");
1663 address rh_end = rh_begin;
1664 while (*(int*)rh_end != 0) {
1665 rh_end += sizeof(int);
1666 }
1667 Disassembler::decode(rh_begin, rh_end);
1668 } else {
1669 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1670 }
1671 #endif
1672 }
1673 // add handler to library
1674 _fingerprints->append(fingerprint);
1675 _handlers->append(handler);
1676 // set handler index
1677 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1678 handler_index = _fingerprints->length() - 1;
1679 }
1680 }
1681 // Set handler under SignatureHandlerLibrary_lock
1682 if (handler_index < 0) {
1683 // use generic signature handler
1684 method->set_signature_handler(Interpreter::slow_signature_handler());
1685 } else {
1686 // set handler
1687 method->set_signature_handler(_handlers->at(handler_index));
1688 }
1689 } else {
1690 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1691 // use generic signature handler
1692 method->set_signature_handler(Interpreter::slow_signature_handler());
1693 }
1694 }
1695 #ifdef ASSERT
1696 int handler_index = -1;
1697 int fingerprint_index = -2;
1698 {
1699 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1700 // in any way if accessed from multiple threads. To avoid races with another
1701 // thread which may change the arrays in the above, mutex protected block, we
1702 // have to protect this read access here with the same mutex as well!
1703 MutexLocker mu(SignatureHandlerLibrary_lock);
1704 if (_handlers != NULL) {
1705 handler_index = _handlers->find(method->signature_handler());
1706 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1707 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1708 fingerprint_index = _fingerprints->find(fingerprint);
1709 }
1710 }
1711 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1712 handler_index == fingerprint_index, "sanity check");
1713 #endif // ASSERT
1714 }
1715
1716 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1717 int handler_index = -1;
1718 // use customized signature handler
1719 MutexLocker mu(SignatureHandlerLibrary_lock);
1720 // make sure data structure is initialized
1721 initialize();
1722 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1723 handler_index = _fingerprints->find(fingerprint);
1724 // create handler if necessary
1725 if (handler_index < 0) {
1726 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1727 tty->cr();
1728 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1729 _handlers->length(),
1730 p2i(handler),
1731 fingerprint);
1732 }
1733 _fingerprints->append(fingerprint);
1734 _handlers->append(handler);
1735 } else {
1736 if (PrintSignatureHandlers) {
1737 tty->cr();
1738 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1739 _handlers->length(),
1740 fingerprint,
1741 p2i(_handlers->at(handler_index)),
1742 p2i(handler));
1743 }
1744 }
1745 }
1746
1747
1748 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1749 address SignatureHandlerLibrary::_handler = NULL;
1750 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1751 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1752 address SignatureHandlerLibrary::_buffer = NULL;
1753
1754
1755 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1756 methodHandle m(thread, method);
1757 assert(m->is_native(), "sanity check");
1758 // lookup native function entry point if it doesn't exist
1759 bool in_base_library;
1760 if (!m->has_native_function()) {
1761 NativeLookup::lookup(m, in_base_library, CHECK);
1762 }
1763 // make sure signature handler is installed
1764 SignatureHandlerLibrary::add(m);
1765 // The interpreter entry point checks the signature handler first,
1766 // before trying to fetch the native entry point and klass mirror.
1767 // We must set the signature handler last, so that multiple processors
1768 // preparing the same method will be sure to see non-null entry & mirror.
1769 IRT_END
1770
1771 #if defined(IA32) || defined(AMD64) || defined(ARM)
1772 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1773 if (src_address == dest_address) {
1774 return;
1775 }
1776 ResetNoHandleMark rnm; // In a LEAF entry.
1777 HandleMark hm;
1778 ResourceMark rm;
1779 frame fr = thread->last_frame();
1780 assert(fr.is_interpreted_frame(), "");
1781 jint bci = fr.interpreter_frame_bci();
1782 methodHandle mh(thread, fr.interpreter_frame_method());
1783 Bytecode_invoke invoke(mh, bci);
1784 ArgumentSizeComputer asc(invoke.signature());
1785 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1786 Copy::conjoint_jbytes(src_address, dest_address,
1787 size_of_arguments * Interpreter::stackElementSize);
1788 IRT_END
1789 #endif
1790
1791 #if INCLUDE_JVMTI
1792 // This is a support of the JVMTI PopFrame interface.
1793 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1794 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1795 // The member_name argument is a saved reference (in local#0) to the member_name.
1796 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1797 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1798 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1799 Method* method, address bcp))
1800 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1801 if (code != Bytecodes::_invokestatic) {
1802 return;
1803 }
1804 ConstantPool* cpool = method->constants();
1805 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1806 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1807 Symbol* mname = cpool->name_ref_at(cp_index);
1808
1809 if (MethodHandles::has_member_arg(cname, mname)) {
1810 oop member_name_oop = (oop) member_name;
1811 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1812 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1813 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1814 }
1815 thread->set_vm_result(member_name_oop);
1816 } else {
1817 thread->set_vm_result(NULL);
1818 }
1819 IRT_END
1820 #endif // INCLUDE_JVMTI
1821
1822 #ifndef PRODUCT
1823 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1824 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1825 // The generated code still uses call_VM because that will set up the frame pointer for
1826 // bcp and method.
1827 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1828 const frame f = thread->last_frame();
1829 assert(f.is_interpreted_frame(), "must be an interpreted frame");
1830 methodHandle mh(thread, f.interpreter_frame_method());
1831 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2);
1832 return preserve_this_value;
1833 IRT_END
1834 #endif // !PRODUCT