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