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 LastFrameAccessor last_frame(thread);
96 last_frame.set_bcp(bcp);
97 if (ProfileInterpreter) {
98 // ProfileTraps uses MDOs independently of ProfileInterpreter.
99 // That is why we must check both ProfileInterpreter and mdo != NULL.
100 MethodData* mdo = last_frame.method()->method_data();
101 if (mdo != NULL) {
102 NEEDS_CLEANUP;
103 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
104 }
105 }
106 }
107
108 //------------------------------------------------------------------------------------------------------------------------
109 // Constants
110
111
112 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
113 // access constant pool
114 LastFrameAccessor last_frame(thread);
115 ConstantPool* pool = last_frame.method()->constants();
116 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
117 constantTag tag = pool->tag_at(index);
118
119 assert ((tag.is_unresolved_klass() || tag.is_klass() ||
120 tag.is_unresolved_value_type() || tag.is_value_type()),
121 "wrong ldc call");
122 Klass* klass = pool->klass_at(index, CHECK);
123 oop java_class = klass->java_mirror();
124 thread->set_vm_result(java_class);
125 IRT_END
126
127 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
128 assert(bytecode == Bytecodes::_ldc ||
129 bytecode == Bytecodes::_ldc_w ||
130 bytecode == Bytecodes::_ldc2_w ||
131 bytecode == Bytecodes::_fast_aldc ||
132 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
133 ResourceMark rm(thread);
134 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
135 bytecode == Bytecodes::_fast_aldc_w);
136 LastFrameAccessor last_frame(thread);
137 methodHandle m (thread, last_frame.method());
138 Bytecode_loadconstant ldc(m, last_frame.bci());
139
140 // Double-check the size. (Condy can have any type.)
141 BasicType type = ldc.result_type();
142 switch (type2size[type]) {
143 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
144 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
145 default: ShouldNotReachHere();
146 }
147
148 // Resolve the constant. This does not do unboxing.
149 // But it does replace Universe::the_null_sentinel by null.
150 oop result = ldc.resolve_constant(CHECK);
151 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
152
153 #ifdef ASSERT
154 {
155 // The bytecode wrappers aren't GC-safe so construct a new one
156 Bytecode_loadconstant ldc2(m, last_frame.bci());
157 int rindex = ldc2.cache_index();
158 if (rindex < 0)
159 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
160 if (rindex >= 0) {
161 oop coop = m->constants()->resolved_references()->obj_at(rindex);
162 oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
163 assert(roop == coop, "expected result for assembly code");
164 }
165 }
166 #endif
167 thread->set_vm_result(result);
168 if (!is_fast_aldc) {
169 // Tell the interpreter how to unbox the primitive.
170 guarantee(java_lang_boxing_object::is_instance(result, type), "");
171 int offset = java_lang_boxing_object::value_offset_in_bytes(type);
172 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
173 | (offset & ConstantPoolCacheEntry::field_index_mask));
174 thread->set_vm_result_2((Metadata*)flags);
175 }
176 }
177 IRT_END
178
179
180 //------------------------------------------------------------------------------------------------------------------------
181 // Allocation
182
183 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
184 Klass* k = pool->klass_at(index, CHECK);
185 InstanceKlass* klass = InstanceKlass::cast(k);
186
187 // Make sure we are not instantiating an abstract klass
188 klass->check_valid_for_instantiation(true, CHECK);
189
190 // Make sure klass is initialized
191 klass->initialize(CHECK);
192
193 // At this point the class may not be fully initialized
194 // because of recursive initialization. If it is fully
195 // initialized & has_finalized is not set, we rewrite
196 // it into its fast version (Note: no locking is needed
197 // here since this is an atomic byte write and can be
198 // done more than once).
199 //
200 // Note: In case of classes with has_finalized we don't
201 // rewrite since that saves us an extra check in
202 // the fast version which then would call the
203 // slow version anyway (and do a call back into
204 // Java).
205 // If we have a breakpoint, then we don't rewrite
206 // because the _breakpoint bytecode would be lost.
207 oop obj = klass->allocate_instance(CHECK);
208 thread->set_vm_result(obj);
209 IRT_END
210
211 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) {
212 switch (type) {
213 case T_BOOLEAN:
214 instance()->bool_field_put(offset, (jboolean)*((int*)addr));
215 break;
216 case T_CHAR:
217 instance()->char_field_put(offset, (jchar) *((int*)addr));
218 break;
219 case T_FLOAT:
220 instance()->float_field_put(offset, (jfloat)*((float*)addr));
221 break;
222 case T_DOUBLE:
223 instance()->double_field_put(offset, (jdouble)*((double*)addr));
224 break;
225 case T_BYTE:
226 instance()->byte_field_put(offset, (jbyte)*((int*)addr));
227 break;
228 case T_SHORT:
229 instance()->short_field_put(offset, (jshort)*((int*)addr));
230 break;
231 case T_INT:
232 instance()->int_field_put(offset, (jint)*((int*)addr));
233 break;
234 case T_LONG:
235 instance()->long_field_put(offset, (jlong)*((long long*)addr));
236 break;
237 case T_OBJECT:
238 case T_ARRAY:
239 case T_VALUETYPE:
240 fatal("Should not be handled with this method");
241 break;
242 default:
243 fatal("Unsupported BasicType");
244 }
245 }
246
247 IRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* thread, ConstantPool* pool, int index))
248 // Getting the ValueKlass
249 Klass* k = pool->klass_at(index, CHECK);
250 assert(k->is_value(), "defaultvalue argument must be the value type class");
251 ValueKlass* vklass = ValueKlass::cast(k);
252
253 vklass->initialize(THREAD);
254 oop res = vklass->default_value();
255 thread->set_vm_result(res);
256 IRT_END
257
258 IRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* thread, ConstantPoolCache* cp_cache))
259 LastFrameAccessor last_frame(thread);
260 // Getting the ValueKlass
261 int index = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_withfield));
262 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
263 assert(cp_entry->is_resolved(Bytecodes::_withfield), "Should have been resolved");
264 Klass* klass = cp_entry->f1_as_klass();
265 assert(klass->is_value(), "withfield only applies to value types");
266 ValueKlass* vklass = ValueKlass::cast(klass);
267
268 // Getting Field information
269 int offset = cp_entry->f2_as_index();
270 int field_index = cp_entry->field_index();
271 int field_offset = cp_entry->f2_as_offset();
272 Symbol* field_signature = vklass->field_signature(field_index);
273 ResourceMark rm(THREAD);
274 const char* signature = (const char *) field_signature->as_utf8();
275 BasicType field_type = char2type(signature[0]);
276
277 // Getting old value
278 frame& f = last_frame.get_frame();
279 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1;
280 int vt_offset = type2size[field_type];
281 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset);
282 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver");
283 Handle old_value_h(THREAD, old_value);
284
285 // Creating new value by copying the one passed in argument
286 bool in_heap;
287 instanceOop new_value = vklass->allocate_buffered_or_heap_instance(&in_heap,
288 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
289 Handle new_value_h = Handle(THREAD, new_value);
290 int first_offset = vklass->first_field_offset();
291 vklass->value_store(vklass->data_for_oop(old_value_h()),
292 vklass->data_for_oop(new_value_h()), in_heap, false);
293
294 // Updating the field specified in arguments
295 if (field_type == T_OBJECT || field_type == T_ARRAY) {
296 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
297 assert(aoop == NULL || (oopDesc::is_oop(aoop) && (!aoop->is_value())),"argument must be a reference type");
298 if (in_heap) {
299 new_value_h()->obj_field_put(field_offset, aoop);
300 } else {
301 new_value_h()->obj_field_put_raw(field_offset, aoop);
302 }
303 } else if (field_type == T_VALUETYPE) {
304 if (cp_entry->is_flatten()) {
305 Klass* field_k = vklass->get_value_field_klass(field_index);
306 ValueKlass* field_vk = ValueKlass::cast(field_k);
307 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
308 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type");
309 assert(field_vk == vt_oop->klass(), "Must match");
310 field_vk->value_store(field_vk->data_for_oop(vt_oop),
311 ((char*)(oopDesc*)new_value_h()) + field_offset, in_heap, false);
312 } else {
313 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
314 assert(voop != NULL || (oopDesc::is_oop(voop) && (voop->is_value())),"argument must be a value type");
315 if (VTBuffer::is_in_vt_buffer(voop)) {
316 // new value field is currently allocated in a TLVB, a heap allocated
317 // copy must be created because a field must never point to a TLVB allocated value
318 Handle voop_h = Handle(THREAD, voop);
319 ValueKlass* field_vk = ValueKlass::cast(voop->klass());
320 assert(field_vk == vklass->get_value_field_klass(field_index), "Sanity check");
321 instanceOop field_copy = field_vk->allocate_instance(CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
322 Handle field_copy_h = Handle(THREAD, field_copy);
323 field_vk->value_store(field_vk->data_for_oop(voop_h()), field_vk->data_for_oop(field_copy_h()), true, false);
324 if (in_heap) {
325 new_value_h()->obj_field_put(field_offset, field_copy_h());
326 } else {
327 new_value_h()->obj_field_put_raw(field_offset, field_copy_h());
328 }
329 } else {
330 if (in_heap) {
331 new_value_h()->obj_field_put(field_offset, voop);
332 } else {
333 new_value_h()->obj_field_put_raw(field_offset, voop);
334 }
335 }
336 }
337 } else {
338 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx);
339 copy_primitive_argument(addr, new_value_h, field_offset, field_type);
340 }
341
342 // returning result
343 thread->set_vm_result(new_value_h());
344 return (type2size[field_type] + type2size[T_OBJECT]) * AbstractInterpreter::stackElementSize;
345 IRT_END
346
347 IRT_ENTRY(void, InterpreterRuntime::qgetfield(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder))
348 Handle value_h(THREAD, obj);
349 InstanceKlass* klass = InstanceKlass::cast(field_holder);
350
351 Klass* field_k = klass->get_value_field_klass(index);
352 ValueKlass* field_vklass = ValueKlass::cast(field_k);
353 field_vklass->initialize(THREAD);
354
355 instanceOop res;
356 bool in_heap;
357 if (klass->is_field_flatten(index)) {
358 // allocate instance
359 res = field_vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
360 instanceHandle res_h(THREAD, res);
361 // copy value
362 field_vklass->value_store(((char*)(oopDesc*)value_h()) + klass->field_offset(index),
363 field_vklass->data_for_oop(res), in_heap, false);
364 thread->set_vm_result(res_h());
365 } else {
366 oop res = value_h()->obj_field_acquire(klass->field_offset(index));
367 if (res == NULL) {
368 res = field_vklass->default_value();
369 } else {
370 assert(res->klass() == field_k, "Sanity check");
371 assert(!VTBuffer::is_in_vt_buffer(res), "Sanity check");
372 }
373 thread->set_vm_result(res);
374 }
375 assert(thread->vm_result()->klass() == field_vklass, "sanity check");
376 IRT_END
377
378 IRT_ENTRY(void, InterpreterRuntime::uninitialized_static_value_field(JavaThread* thread, oopDesc* mirror, int index))
379 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
380 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
381 int offset = klass->field_offset(index);
382 assert(mirror->obj_field(offset) == NULL,"Field must not be initialized twice");
383
384 Klass* field_k = klass->get_value_field_klass_or_null(index);
385 if (field_k == NULL) {
386 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index),
387 Handle(THREAD, klass->class_loader()),
388 Handle(THREAD, klass->protection_domain()), true, CHECK);
389 assert(field_k != NULL, "Sanity check");
390 assert(field_k->access_flags().is_value_type(), "Value type expected");
391 klass->set_value_field_klass(index, field_k);
392 }
393 ValueKlass* field_vklass = ValueKlass::cast(field_k);
394 instanceOop res = (instanceOop)field_vklass->default_value();
395 thread->set_vm_result(res);
396 IRT_END
397
398 IRT_ENTRY(void, InterpreterRuntime::qputfield(JavaThread* thread, oopDesc* obj, oopDesc* value, ConstantPoolCache* cp_cache))
399 LastFrameAccessor last_frame(thread);
400 Handle value_h(THREAD, value);
401 Handle obj_h(THREAD, obj);
402 assert(!obj_h()->klass()->is_value(), "obj must be an object");
403 assert(value_h()->klass()->is_value(), "value must be an value type");
404
405 int idx = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_putfield));
406 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(idx);
407
408 int index = cp_entry->field_index();
409 bool flatten = cp_entry->is_flatten();
410
411 InstanceKlass* klass = InstanceKlass::cast(cp_entry->f1_as_klass());
412 Klass* field_k = klass->get_value_field_klass(index);
413 ValueKlass* field_vklass = ValueKlass::cast(value->klass());
414 assert(value_h()->klass() == field_k, "Sanity check");
415 assert(field_k == field_vklass, "Field descriptor and argument must match");
416 if (flatten) {
417 // copy value
418 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
419 ((char*)(oopDesc*)obj_h()) + klass->field_offset(index), true, false);
420 } else {
421 if (!VTBuffer::is_in_vt_buffer(value_h())) {
422 obj_h()->obj_field_put(klass->field_offset(index), value_h());
423 } else {
424 // allocate heap instance
425 instanceOop val = field_vklass->allocate_instance(CHECK);
426 instanceHandle res_h(THREAD, val);
427 // copy value
428 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
429 field_vklass->data_for_oop(res_h()), true, false);
430
431
432 obj_h()->obj_field_put(klass->field_offset(index), res_h());
433 }
434 }
435 IRT_END
436
437 IRT_ENTRY(void, InterpreterRuntime::qputstatic(JavaThread* thread, oopDesc* value, int offset, oopDesc* mirror))
438 instanceHandle value_h(THREAD, (instanceOop)value);
439 assert(value_h()->is_value(), "qputstatic only deals with value arguments");
440 if (!VTBuffer::is_in_vt_buffer(value_h())) {
441 mirror->obj_field_put(offset, value_h());
442 } else {
443 // The argument is a buffered value, a copy must be created in the Java heap
444 // because a static field cannot point to a thread-local buffered value
445 ValueKlass* field_vklass = ValueKlass::cast(value_h()->klass());
446 Handle mirror_h(THREAD, mirror);
447 // allocate heap instance
448 instanceOop res = field_vklass->allocate_instance(CHECK);
449 assert(Universe::heap()->is_in_reserved(res), "Must be in the Java heap");
450 instanceHandle res_h(THREAD, res);
451 // copy value
452 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
453 field_vklass->data_for_oop(res), true, false);
454 // writing static field
455 mirror_h->obj_field_put(offset, res_h());
456 assert(mirror_h->obj_field(offset) != NULL,"Sanity check");
457 }
458 IRT_END
459
460 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
461 oop obj = oopFactory::new_typeArray(type, size, CHECK);
462 thread->set_vm_result(obj);
463 IRT_END
464
465
466 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
467 Klass* klass = pool->klass_at(index, CHECK);
468 if (klass->is_value()) { // Logically creates elements, ensure klass init
469 klass->initialize(CHECK);
470 }
471 arrayOop obj = oopFactory::new_array(klass, size, CHECK);
472 thread->set_vm_result(obj);
473 IRT_END
474
475 IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
476 Klass* klass = array->klass();
477 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
478
479 if (klass->is_objArray_klass()) {
480 thread->set_vm_result(((objArrayOop) array)->obj_at(index));
481 } else {
482 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
483 ValueKlass* vklass = vaklass->element_klass();
484 arrayHandle ah(THREAD, array);
485 bool in_heap;
486 instanceOop value_holder = vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
487 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper());
488 vklass->value_store(src, vklass->data_for_oop(value_holder),
489 vaklass->element_byte_size(), in_heap, false);
490 thread->set_vm_result(value_holder);
491 }
492 IRT_END
493
494 IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, arrayOopDesc* array, int index, void* val))
495 Klass* klass = array->klass();
496 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
497 Handle array_h(THREAD, array);
498
499 if (ArrayKlass::cast(klass)->element_klass() != ((oop)val)->klass()) {
500 THROW(vmSymbols::java_lang_ArrayStoreException());
501 }
502 if (klass->is_objArray_klass()) {
503 if(VTBuffer::is_in_vt_buffer(val)) {
504 // A Java heap allocated copy must be made because an array cannot
505 // reference a thread-local buffered value
506 Handle val_h(THREAD, (oop)val);
507 ObjArrayKlass* aklass = ObjArrayKlass::cast(klass);
508 Klass* eklass = aklass->element_klass();
509 assert(eklass->is_value(), "Sanity check");
510 assert(eklass == ((oop)val)->klass(), "Sanity check");
511 ValueKlass* vklass = ValueKlass::cast(eklass);
512 // allocate heap instance
513 instanceOop res = vklass->allocate_instance(CHECK);
514 Handle res_h(THREAD, res);
515 // copy value
516 vklass->value_store(((char*)(oopDesc*)val_h()) + vklass->first_field_offset(),
517 ((char*)(oopDesc*)res_h()) + vklass->first_field_offset(),true, false);
518 val = res_h();
519 }
520 ((objArrayOop) array_h())->obj_at_put(index, (oop)val);
521 } else {
522 valueArrayOop varray = (valueArrayOop)array;
523 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
524 ValueKlass* vklass = vaklass->element_klass();
525 const int lh = vaklass->layout_helper();
526 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
527 vaklass->element_byte_size(), true, false);
528 }
529 IRT_END
530
531 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
532 // We may want to pass in more arguments - could make this slightly faster
533 LastFrameAccessor last_frame(thread);
534 ConstantPool* constants = last_frame.method()->constants();
535 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
536 Klass* klass = constants->klass_at(i, CHECK);
537 int nof_dims = last_frame.number_of_dimensions();
538 assert(klass->is_klass(), "not a class");
539 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
540
541 if (klass->is_value()) { // Logically creates elements, ensure klass init
542 klass->initialize(CHECK);
543 }
544
545 // We must create an array of jints to pass to multi_allocate.
546 ResourceMark rm(thread);
547 const int small_dims = 10;
548 jint dim_array[small_dims];
549 jint *dims = &dim_array[0];
550 if (nof_dims > small_dims) {
551 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
552 }
553 for (int index = 0; index < nof_dims; index++) {
554 // offset from first_size_address is addressed as local[index]
555 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
556 dims[index] = first_size_address[n];
557 }
558 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
559 thread->set_vm_result(obj);
560 IRT_END
561
562 IRT_LEAF(void, InterpreterRuntime::recycle_vtbuffer(void* alloc_ptr))
563 JavaThread* thread = (JavaThread*)Thread::current();
564 VTBuffer::recycle_vtbuffer(thread, alloc_ptr);
565 IRT_END
566
567 IRT_ENTRY(void, InterpreterRuntime::recycle_buffered_values(JavaThread* thread))
568 frame f = thread->last_frame();
569 assert(f.is_interpreted_frame(), "recycling can only be triggered from interpreted frames");
570 VTBuffer::recycle_vt_in_frame(thread, &f);
571 IRT_END
572
573 IRT_ENTRY(void, InterpreterRuntime::fix_frame_vt_alloc_ptr(JavaThread* thread))
574 frame f = thread->last_frame();
575 VTBuffer::fix_frame_vt_alloc_ptr(f, VTBufferChunk::chunk(thread->vt_alloc_ptr()));
576 IRT_END
577
578 IRT_ENTRY(void, InterpreterRuntime::return_value(JavaThread* thread, oopDesc* obj))
579 if (!VTBuffer::is_in_vt_buffer(obj)) {
580 thread->set_vm_result(obj);
581 return;
582 }
583 assert(obj->klass()->is_value(), "Sanity check");
584 ValueKlass* vk = ValueKlass::cast(obj->klass());
585 RegisterMap reg_map(thread, false);
586 frame current_frame = thread->last_frame();
587 frame caller_frame = current_frame.sender(®_map);
588 if (!caller_frame.is_interpreted_frame()) {
589 // caller is not an interpreted frame, creating a new value in Java heap
590 Handle obj_h(THREAD, obj);
591 instanceOop res = vk->allocate_instance(CHECK);
592 Handle res_h(THREAD, res);
593 // copy value
594 vk->value_store(vk->data_for_oop(obj_h()),
595 vk->data_for_oop(res_h()), true, false);
596 thread->set_vm_result(res_h());
597 return;
598 } else {
599 // A buffered value is being returned to an interpreted frame,
600 // but the work has to be delayed to remove_activation() because
601 // the frame cannot be modified now (GC can run at the safepoint
602 // when exiting runtime, and frame layout must be kept consistent
603 // with the OopMap).
604 thread->set_return_buffered_value(obj);
605 thread->set_vm_result(obj);
606 }
607 IRT_END
608
609 IRT_LEAF(void, InterpreterRuntime::return_value_step2(oopDesc* obj, void* alloc_ptr))
610
611 JavaThread* thread = (JavaThread*)Thread::current();
612 assert(obj == thread->return_buffered_value(), "Consistency check");
613 assert(!Universe::heap()->is_in_reserved(obj), "Should only apply to buffered values");
614
615 oop dest = VTBuffer::relocate_return_value(thread, alloc_ptr, obj);
616 thread->set_return_buffered_value(NULL);
617 thread->set_vm_result(dest);
618 IRT_END
619
620 IRT_ENTRY(void, InterpreterRuntime::check_areturn(JavaThread* thread, oopDesc* obj))
621 if (obj != NULL) {
622 Klass* k = obj->klass();
623 if (k->is_value()) {
624 // ResourceMark rm(thread);
625 // tty->print_cr("areturn used on a value from %s", k->name()->as_C_string());
626 }
627 }
628 thread->set_vm_result(obj);
629 IRT_END
630
631 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
632 assert(oopDesc::is_oop(obj), "must be a valid oop");
633 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
634 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
635 IRT_END
636
637
638 // Quicken instance-of and check-cast bytecodes
639 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
640 // Force resolving; quicken the bytecode
641 LastFrameAccessor last_frame(thread);
642 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
643 ConstantPool* cpool = last_frame.method()->constants();
644 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
645 // program we might have seen an unquick'd bytecode in the interpreter but have another
646 // thread quicken the bytecode before we get here.
647 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
648 Klass* klass = cpool->klass_at(which, CHECK);
649 thread->set_vm_result_2(klass);
650 IRT_END
651
652
653 //------------------------------------------------------------------------------------------------------------------------
654 // Exceptions
655
656 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
657 const methodHandle& trap_method, int trap_bci, TRAPS) {
658 if (trap_method.not_null()) {
659 MethodData* trap_mdo = trap_method->method_data();
660 if (trap_mdo == NULL) {
661 Method::build_interpreter_method_data(trap_method, THREAD);
662 if (HAS_PENDING_EXCEPTION) {
663 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
664 "we expect only an OOM error here");
665 CLEAR_PENDING_EXCEPTION;
666 }
667 trap_mdo = trap_method->method_data();
668 // and fall through...
669 }
670 if (trap_mdo != NULL) {
671 // Update per-method count of trap events. The interpreter
672 // is updating the MDO to simulate the effect of compiler traps.
673 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
674 }
675 }
676 }
677
678 // Assume the compiler is (or will be) interested in this event.
679 // If necessary, create an MDO to hold the information, and record it.
680 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
681 assert(ProfileTraps, "call me only if profiling");
682 LastFrameAccessor last_frame(thread);
683 methodHandle trap_method(thread, last_frame.method());
684 int trap_bci = trap_method->bci_from(last_frame.bcp());
685 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
686 }
687
688 #ifdef CC_INTERP
689 // As legacy note_trap, but we have more arguments.
690 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
691 methodHandle trap_method(method);
692 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
693 IRT_END
694
695 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
696 // for each exception.
697 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
698 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
699 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
700 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
701 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
702 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
703 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
704 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
705 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
706 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
707 #endif // CC_INTERP
708
709
710 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
711 // get klass
712 InstanceKlass* klass = InstanceKlass::cast(k);
713 assert(klass->is_initialized(),
714 "this klass should have been initialized during VM initialization");
715 // create instance - do not call constructor since we may have no
716 // (java) stack space left (should assert constructor is empty)
717 Handle exception;
718 oop exception_oop = klass->allocate_instance(CHECK_(exception));
719 exception = Handle(THREAD, exception_oop);
720 if (StackTraceInThrowable) {
721 java_lang_Throwable::fill_in_stack_trace(exception);
722 }
723 return exception;
724 }
725
726 // Special handling for stack overflow: since we don't have any (java) stack
727 // space left we use the pre-allocated & pre-initialized StackOverflowError
728 // klass to create an stack overflow error instance. We do not call its
729 // constructor for the same reason (it is empty, anyway).
730 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
731 Handle exception = get_preinitialized_exception(
732 SystemDictionary::StackOverflowError_klass(),
733 CHECK);
734 // Increment counter for hs_err file reporting
735 Atomic::inc(&Exceptions::_stack_overflow_errors);
736 THROW_HANDLE(exception);
737 IRT_END
738
739 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
740 Handle exception = get_preinitialized_exception(
741 SystemDictionary::StackOverflowError_klass(),
742 CHECK);
743 java_lang_Throwable::set_message(exception(),
744 Universe::delayed_stack_overflow_error_message());
745 // Increment counter for hs_err file reporting
746 Atomic::inc(&Exceptions::_stack_overflow_errors);
747 THROW_HANDLE(exception);
748 IRT_END
749
750 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
751 // lookup exception klass
752 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
753 if (ProfileTraps) {
754 if (s == vmSymbols::java_lang_ArithmeticException()) {
755 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
756 } else if (s == vmSymbols::java_lang_NullPointerException()) {
757 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
758 }
759 }
760 // create exception
761 Handle exception = Exceptions::new_exception(thread, s, message);
762 thread->set_vm_result(exception());
763 IRT_END
764
765
766 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
767 ResourceMark rm(thread);
768 const char* klass_name = obj->klass()->external_name();
769 // lookup exception klass
770 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
771 if (ProfileTraps) {
772 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
773 }
774 // create exception, with klass name as detail message
775 Handle exception = Exceptions::new_exception(thread, s, klass_name);
776 thread->set_vm_result(exception());
777 IRT_END
778
779
780 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
781 char message[jintAsStringSize];
782 // lookup exception klass
783 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
784 if (ProfileTraps) {
785 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
786 }
787 // create exception
788 sprintf(message, "%d", index);
789 THROW_MSG(s, message);
790 IRT_END
791
792 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
793 JavaThread* thread, oopDesc* obj))
794
795 ResourceMark rm(thread);
796 char* message = SharedRuntime::generate_class_cast_message(
797 thread, obj->klass());
798
799 if (ProfileTraps) {
800 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
801 }
802
803 // create exception
804 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
805 IRT_END
806
807 // exception_handler_for_exception(...) returns the continuation address,
808 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
809 // The exception oop is returned to make sure it is preserved over GC (it
810 // is only on the stack if the exception was thrown explicitly via athrow).
811 // During this operation, the expression stack contains the values for the
812 // bci where the exception happened. If the exception was propagated back
813 // from a call, the expression stack contains the values for the bci at the
814 // invoke w/o arguments (i.e., as if one were inside the call).
815 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
816
817 LastFrameAccessor last_frame(thread);
818 Handle h_exception(thread, exception);
819 methodHandle h_method (thread, last_frame.method());
820 constantPoolHandle h_constants(thread, h_method->constants());
821 bool should_repeat;
822 int handler_bci;
823 int current_bci = last_frame.bci();
824
825 if (thread->frames_to_pop_failed_realloc() > 0) {
826 // Allocation of scalar replaced object used in this frame
827 // failed. Unconditionally pop the frame.
828 thread->dec_frames_to_pop_failed_realloc();
829 thread->set_vm_result(h_exception());
830 // If the method is synchronized we already unlocked the monitor
831 // during deoptimization so the interpreter needs to skip it when
832 // the frame is popped.
833 thread->set_do_not_unlock_if_synchronized(true);
834 #ifdef CC_INTERP
835 return (address) -1;
836 #else
837 return Interpreter::remove_activation_entry();
838 #endif
839 }
840
841 // Need to do this check first since when _do_not_unlock_if_synchronized
842 // is set, we don't want to trigger any classloading which may make calls
843 // into java, or surprisingly find a matching exception handler for bci 0
844 // since at this moment the method hasn't been "officially" entered yet.
845 if (thread->do_not_unlock_if_synchronized()) {
846 ResourceMark rm;
847 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
848 thread->set_vm_result(exception);
849 #ifdef CC_INTERP
850 return (address) -1;
851 #else
852 return Interpreter::remove_activation_entry();
853 #endif
854 }
855
856 do {
857 should_repeat = false;
858
859 // assertions
860 #ifdef ASSERT
861 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
862 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
863 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
864 if (ExitVMOnVerifyError) vm_exit(-1);
865 ShouldNotReachHere();
866 }
867 #endif
868
869 // tracing
870 if (log_is_enabled(Info, exceptions)) {
871 ResourceMark rm(thread);
872 stringStream tempst;
873 tempst.print("interpreter method <%s>\n"
874 " at bci %d for thread " INTPTR_FORMAT,
875 h_method->print_value_string(), current_bci, p2i(thread));
876 Exceptions::log_exception(h_exception, tempst);
877 }
878 // Don't go paging in something which won't be used.
879 // else if (extable->length() == 0) {
880 // // disabled for now - interpreter is not using shortcut yet
881 // // (shortcut is not to call runtime if we have no exception handlers)
882 // // warning("performance bug: should not call runtime if method has no exception handlers");
883 // }
884 // for AbortVMOnException flag
885 Exceptions::debug_check_abort(h_exception);
886
887 // exception handler lookup
888 Klass* klass = h_exception->klass();
889 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
890 if (HAS_PENDING_EXCEPTION) {
891 // We threw an exception while trying to find the exception handler.
892 // Transfer the new exception to the exception handle which will
893 // be set into thread local storage, and do another lookup for an
894 // exception handler for this exception, this time starting at the
895 // BCI of the exception handler which caused the exception to be
896 // thrown (bug 4307310).
897 h_exception = Handle(THREAD, PENDING_EXCEPTION);
898 CLEAR_PENDING_EXCEPTION;
899 if (handler_bci >= 0) {
900 current_bci = handler_bci;
901 should_repeat = true;
902 }
903 }
904 } while (should_repeat == true);
905
906 #if INCLUDE_JVMCI
907 if (EnableJVMCI && h_method->method_data() != NULL) {
908 ResourceMark rm(thread);
909 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
910 if (pdata != NULL && pdata->is_BitData()) {
911 BitData* bit_data = (BitData*) pdata;
912 bit_data->set_exception_seen();
913 }
914 }
915 #endif
916
917 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
918 // time throw or a stack unwinding throw and accordingly notify the debugger
919 if (JvmtiExport::can_post_on_exceptions()) {
920 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
921 }
922
923 #ifdef CC_INTERP
924 address continuation = (address)(intptr_t) handler_bci;
925 #else
926 address continuation = NULL;
927 #endif
928 address handler_pc = NULL;
929 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
930 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
931 // handler in this method, or (b) after a stack overflow there is not yet
932 // enough stack space available to reprotect the stack.
933 #ifndef CC_INTERP
934 continuation = Interpreter::remove_activation_entry();
935 #endif
936 #if COMPILER2_OR_JVMCI
937 // Count this for compilation purposes
938 h_method->interpreter_throwout_increment(THREAD);
939 #endif
940 } else {
941 // handler in this method => change bci/bcp to handler bci/bcp and continue there
942 handler_pc = h_method->code_base() + handler_bci;
943 #ifndef CC_INTERP
944 set_bcp_and_mdp(handler_pc, thread);
945 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
946 #endif
947 }
948 // notify debugger of an exception catch
949 // (this is good for exceptions caught in native methods as well)
950 if (JvmtiExport::can_post_on_exceptions()) {
951 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
952 }
953
954 thread->set_vm_result(h_exception());
955 return continuation;
956 IRT_END
957
958
959 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
960 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
961 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
962 IRT_END
963
964
965 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
966 THROW(vmSymbols::java_lang_AbstractMethodError());
967 IRT_END
968
969
970 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
971 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
972 IRT_END
973
974
975 //------------------------------------------------------------------------------------------------------------------------
976 // Fields
977 //
978
979 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
980 Thread* THREAD = thread;
981 // resolve field
982 fieldDescriptor info;
983 LastFrameAccessor last_frame(thread);
984 constantPoolHandle pool(thread, last_frame.method()->constants());
985 methodHandle m(thread, last_frame.method());
986 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
987 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
988 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
989 bool is_value = bytecode == Bytecodes::_withfield;
990
991 {
992 JvmtiHideSingleStepping jhss(thread);
993 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
994 m, bytecode, CHECK);
995 } // end JvmtiHideSingleStepping
996
997 // check if link resolution caused cpCache to be updated
998 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
999 if (cp_cache_entry->is_resolved(bytecode)) return;
1000
1001 // compute auxiliary field attributes
1002 TosState state = as_TosState(info.field_type());
1003
1004 // Resolution of put instructions on final fields is delayed. That is required so that
1005 // exceptions are thrown at the correct place (when the instruction is actually invoked).
1006 // If we do not resolve an instruction in the current pass, leaving the put_code
1007 // set to zero will cause the next put instruction to the same field to reresolve.
1008
1009 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
1010 // to final instance fields with updates originating from a method different than <init>)
1011 // is inhibited. A putfield instruction targeting an instance final field must throw
1012 // an IllegalAccessError if the instruction is not in an instance
1013 // initializer method <init>. If resolution were not inhibited, a putfield
1014 // in an initializer method could be resolved in the initializer. Subsequent
1015 // putfield instructions to the same field would then use cached information.
1016 // As a result, those instructions would not pass through the VM. That is,
1017 // checks in resolve_field_access() would not be executed for those instructions
1018 // and the required IllegalAccessError would not be thrown.
1019 //
1020 // Also, we need to delay resolving getstatic and putstatic instructions until the
1021 // class is initialized. This is required so that access to the static
1022 // field will call the initialization function every time until the class
1023 // is completely initialized ala. in 2.17.5 in JVM Specification.
1024 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
1025 bool uninitialized_static = is_static && !klass->is_initialized();
1026 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
1027 info.has_initialized_final_update();
1028 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
1029
1030 Bytecodes::Code get_code = (Bytecodes::Code)0;
1031 Bytecodes::Code put_code = (Bytecodes::Code)0;
1032 if (!uninitialized_static) {
1033 if (is_static) {
1034 get_code = Bytecodes::_getstatic;
1035 } else {
1036 get_code = Bytecodes::_getfield;
1037 }
1038 if (is_put && is_value) {
1039 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
1040 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
1041 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
1042 }
1043 }
1044
1045 cp_cache_entry->set_field(
1046 get_code,
1047 put_code,
1048 info.field_holder(),
1049 info.index(),
1050 info.offset(),
1051 state,
1052 info.access_flags().is_final(),
1053 info.access_flags().is_volatile(),
1054 info.is_flatten(),
1055 info.is_flattenable(),
1056 pool->pool_holder()
1057 );
1058 }
1059
1060
1061 //------------------------------------------------------------------------------------------------------------------------
1062 // Synchronization
1063 //
1064 // The interpreter's synchronization code is factored out so that it can
1065 // be shared by method invocation and synchronized blocks.
1066 //%note synchronization_3
1067
1068 //%note monitor_1
1069 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
1070 #ifdef ASSERT
1071 thread->last_frame().interpreter_frame_verify_monitor(elem);
1072 #endif
1073 if (PrintBiasedLockingStatistics) {
1074 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
1075 }
1076 Handle h_obj(thread, elem->obj());
1077 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1078 "must be NULL or an object");
1079 if (UseBiasedLocking) {
1080 // Retry fast entry if bias is revoked to avoid unnecessary inflation
1081 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
1082 } else {
1083 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
1084 }
1085 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
1086 "must be NULL or an object");
1087 #ifdef ASSERT
1088 thread->last_frame().interpreter_frame_verify_monitor(elem);
1089 #endif
1090 IRT_END
1091
1092
1093 //%note monitor_1
1094 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
1095 #ifdef ASSERT
1096 thread->last_frame().interpreter_frame_verify_monitor(elem);
1097 #endif
1098 Handle h_obj(thread, elem->obj());
1099 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1100 "must be NULL or an object");
1101 if (elem == NULL || h_obj()->is_unlocked()) {
1102 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1103 }
1104 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
1105 // Free entry. This must be done here, since a pending exception might be installed on
1106 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
1107 elem->set_obj(NULL);
1108 #ifdef ASSERT
1109 thread->last_frame().interpreter_frame_verify_monitor(elem);
1110 #endif
1111 IRT_END
1112
1113
1114 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
1115 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1116 IRT_END
1117
1118
1119 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
1120 // Returns an illegal exception to install into the current thread. The
1121 // pending_exception flag is cleared so normal exception handling does not
1122 // trigger. Any current installed exception will be overwritten. This
1123 // method will be called during an exception unwind.
1124
1125 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1126 Handle exception(thread, thread->vm_result());
1127 assert(exception() != NULL, "vm result should be set");
1128 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1129 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
1130 exception = get_preinitialized_exception(
1131 SystemDictionary::IllegalMonitorStateException_klass(),
1132 CATCH);
1133 }
1134 thread->set_vm_result(exception());
1135 IRT_END
1136
1137
1138 //------------------------------------------------------------------------------------------------------------------------
1139 // Invokes
1140
1141 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
1142 return method->orig_bytecode_at(method->bci_from(bcp));
1143 IRT_END
1144
1145 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
1146 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1147 IRT_END
1148
1149 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
1150 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
1151 IRT_END
1152
1153 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
1154 Thread* THREAD = thread;
1155 LastFrameAccessor last_frame(thread);
1156 // extract receiver from the outgoing argument list if necessary
1157 Handle receiver(thread, NULL);
1158 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1159 bytecode == Bytecodes::_invokespecial) {
1160 ResourceMark rm(thread);
1161 methodHandle m (thread, last_frame.method());
1162 Bytecode_invoke call(m, last_frame.bci());
1163 Symbol* signature = call.signature();
1164 receiver = Handle(thread, last_frame.callee_receiver(signature));
1165
1166 assert(Universe::heap()->is_in_reserved_or_null(receiver())
1167 || VTBuffer::is_in_vt_buffer(receiver()),
1168 "sanity check");
1169 assert(receiver.is_null() ||
1170 !Universe::heap()->is_in_reserved(receiver->klass()),
1171 "sanity check");
1172 }
1173
1174 // resolve method
1175 CallInfo info;
1176 constantPoolHandle pool(thread, last_frame.method()->constants());
1177
1178 {
1179 JvmtiHideSingleStepping jhss(thread);
1180 LinkResolver::resolve_invoke(info, receiver, pool,
1181 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1182 CHECK);
1183 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
1184 int retry_count = 0;
1185 while (info.resolved_method()->is_old()) {
1186 // It is very unlikely that method is redefined more than 100 times
1187 // in the middle of resolve. If it is looping here more than 100 times
1188 // means then there could be a bug here.
1189 guarantee((retry_count++ < 100),
1190 "Could not resolve to latest version of redefined method");
1191 // method is redefined in the middle of resolve so re-try.
1192 LinkResolver::resolve_invoke(info, receiver, pool,
1193 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1194 CHECK);
1195 }
1196 }
1197 } // end JvmtiHideSingleStepping
1198
1199 // check if link resolution caused cpCache to be updated
1200 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1201 if (cp_cache_entry->is_resolved(bytecode)) return;
1202
1203 #ifdef ASSERT
1204 if (bytecode == Bytecodes::_invokeinterface) {
1205 if (info.resolved_method()->method_holder() ==
1206 SystemDictionary::Object_klass()) {
1207 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1208 // (see also CallInfo::set_interface for details)
1209 assert(info.call_kind() == CallInfo::vtable_call ||
1210 info.call_kind() == CallInfo::direct_call, "");
1211 methodHandle rm = info.resolved_method();
1212 assert(rm->is_final() || info.has_vtable_index(),
1213 "should have been set already");
1214 } else if (!info.resolved_method()->has_itable_index()) {
1215 // Resolved something like CharSequence.toString. Use vtable not itable.
1216 assert(info.call_kind() != CallInfo::itable_call, "");
1217 } else {
1218 // Setup itable entry
1219 assert(info.call_kind() == CallInfo::itable_call, "");
1220 int index = info.resolved_method()->itable_index();
1221 assert(info.itable_index() == index, "");
1222 }
1223 } else if (bytecode == Bytecodes::_invokespecial) {
1224 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1225 } else {
1226 assert(info.call_kind() == CallInfo::direct_call ||
1227 info.call_kind() == CallInfo::vtable_call, "");
1228 }
1229 #endif
1230 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
1231 // it is not an interface. The receiver for invokespecial calls within interface
1232 // methods must be checked for every call.
1233 InstanceKlass* sender = pool->pool_holder();
1234 sender = sender->has_host_klass() ? sender->host_klass() : sender;
1235
1236 switch (info.call_kind()) {
1237 case CallInfo::direct_call:
1238 cp_cache_entry->set_direct_call(
1239 bytecode,
1240 info.resolved_method(),
1241 sender->is_interface());
1242 break;
1243 case CallInfo::vtable_call:
1244 cp_cache_entry->set_vtable_call(
1245 bytecode,
1246 info.resolved_method(),
1247 info.vtable_index());
1248 break;
1249 case CallInfo::itable_call:
1250 cp_cache_entry->set_itable_call(
1251 bytecode,
1252 info.resolved_klass(),
1253 info.resolved_method(),
1254 info.itable_index());
1255 break;
1256 default: ShouldNotReachHere();
1257 }
1258 }
1259
1260
1261 // First time execution: Resolve symbols, create a permanent MethodType object.
1262 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1263 Thread* THREAD = thread;
1264 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1265 LastFrameAccessor last_frame(thread);
1266
1267 // resolve method
1268 CallInfo info;
1269 constantPoolHandle pool(thread, last_frame.method()->constants());
1270 {
1271 JvmtiHideSingleStepping jhss(thread);
1272 LinkResolver::resolve_invoke(info, Handle(), pool,
1273 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1274 CHECK);
1275 } // end JvmtiHideSingleStepping
1276
1277 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1278 cp_cache_entry->set_method_handle(pool, info);
1279 }
1280
1281 // First time execution: Resolve symbols, create a permanent CallSite object.
1282 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1283 Thread* THREAD = thread;
1284 LastFrameAccessor last_frame(thread);
1285 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1286
1287 //TO DO: consider passing BCI to Java.
1288 // int caller_bci = last_frame.method()->bci_from(last_frame.bcp());
1289
1290 // resolve method
1291 CallInfo info;
1292 constantPoolHandle pool(thread, last_frame.method()->constants());
1293 int index = last_frame.get_index_u4(bytecode);
1294 {
1295 JvmtiHideSingleStepping jhss(thread);
1296 LinkResolver::resolve_invoke(info, Handle(), pool,
1297 index, bytecode, CHECK);
1298 } // end JvmtiHideSingleStepping
1299
1300 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1301 cp_cache_entry->set_dynamic_call(pool, info);
1302 }
1303
1304 // This function is the interface to the assembly code. It returns the resolved
1305 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1306 // This function will check for redefinition!
1307 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1308 switch (bytecode) {
1309 case Bytecodes::_getstatic:
1310 case Bytecodes::_putstatic:
1311 case Bytecodes::_getfield:
1312 case Bytecodes::_putfield:
1313 case Bytecodes::_withfield:
1314 resolve_get_put(thread, bytecode);
1315 break;
1316 case Bytecodes::_invokevirtual:
1317 case Bytecodes::_invokespecial:
1318 case Bytecodes::_invokestatic:
1319 case Bytecodes::_invokeinterface:
1320 resolve_invoke(thread, bytecode);
1321 break;
1322 case Bytecodes::_invokehandle:
1323 resolve_invokehandle(thread);
1324 break;
1325 case Bytecodes::_invokedynamic:
1326 resolve_invokedynamic(thread);
1327 break;
1328 default:
1329 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1330 break;
1331 }
1332 }
1333 IRT_END
1334
1335 //------------------------------------------------------------------------------------------------------------------------
1336 // Miscellaneous
1337
1338
1339 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1340 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1341 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1342 if (branch_bcp != NULL && nm != NULL) {
1343 // This was a successful request for an OSR nmethod. Because
1344 // frequency_counter_overflow_inner ends with a safepoint check,
1345 // nm could have been unloaded so look it up again. It's unsafe
1346 // to examine nm directly since it might have been freed and used
1347 // for something else.
1348 LastFrameAccessor last_frame(thread);
1349 Method* method = last_frame.method();
1350 int bci = method->bci_from(last_frame.bcp());
1351 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1352 }
1353 if (nm != NULL && thread->is_interp_only_mode()) {
1354 // Normally we never get an nm if is_interp_only_mode() is true, because
1355 // policy()->event has a check for this and won't compile the method when
1356 // true. However, it's possible for is_interp_only_mode() to become true
1357 // during the compilation. We don't want to return the nm in that case
1358 // because we want to continue to execute interpreted.
1359 nm = NULL;
1360 }
1361 #ifndef PRODUCT
1362 if (TraceOnStackReplacement) {
1363 if (nm != NULL) {
1364 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1365 nm->print();
1366 }
1367 }
1368 #endif
1369 return nm;
1370 }
1371
1372 IRT_ENTRY(nmethod*,
1373 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1374 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1375 // flag, in case this method triggers classloading which will call into Java.
1376 UnlockFlagSaver fs(thread);
1377
1378 LastFrameAccessor last_frame(thread);
1379 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1380 methodHandle method(thread, last_frame.method());
1381 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1382 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1383
1384 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1385 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1386 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1387
1388 if (osr_nm != NULL) {
1389 // We may need to do on-stack replacement which requires that no
1390 // monitors in the activation are biased because their
1391 // BasicObjectLocks will need to migrate during OSR. Force
1392 // unbiasing of all monitors in the activation now (even though
1393 // the OSR nmethod might be invalidated) because we don't have a
1394 // safepoint opportunity later once the migration begins.
1395 if (UseBiasedLocking) {
1396 ResourceMark rm;
1397 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1398 for( BasicObjectLock *kptr = last_frame.monitor_end();
1399 kptr < last_frame.monitor_begin();
1400 kptr = last_frame.next_monitor(kptr) ) {
1401 if( kptr->obj() != NULL ) {
1402 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1403 }
1404 }
1405 BiasedLocking::revoke(objects_to_revoke);
1406 }
1407 }
1408 return osr_nm;
1409 IRT_END
1410
1411 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1412 assert(ProfileInterpreter, "must be profiling interpreter");
1413 int bci = method->bci_from(cur_bcp);
1414 MethodData* mdo = method->method_data();
1415 if (mdo == NULL) return 0;
1416 return mdo->bci_to_di(bci);
1417 IRT_END
1418
1419 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1420 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1421 // flag, in case this method triggers classloading which will call into Java.
1422 UnlockFlagSaver fs(thread);
1423
1424 assert(ProfileInterpreter, "must be profiling interpreter");
1425 LastFrameAccessor last_frame(thread);
1426 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1427 methodHandle method(thread, last_frame.method());
1428 Method::build_interpreter_method_data(method, THREAD);
1429 if (HAS_PENDING_EXCEPTION) {
1430 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1431 CLEAR_PENDING_EXCEPTION;
1432 // and fall through...
1433 }
1434 IRT_END
1435
1436
1437 #ifdef ASSERT
1438 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1439 assert(ProfileInterpreter, "must be profiling interpreter");
1440
1441 MethodData* mdo = method->method_data();
1442 assert(mdo != NULL, "must not be null");
1443
1444 int bci = method->bci_from(bcp);
1445
1446 address mdp2 = mdo->bci_to_dp(bci);
1447 if (mdp != mdp2) {
1448 ResourceMark rm;
1449 ResetNoHandleMark rnm; // In a LEAF entry.
1450 HandleMark hm;
1451 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1452 int current_di = mdo->dp_to_di(mdp);
1453 int expected_di = mdo->dp_to_di(mdp2);
1454 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1455 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1456 int approx_bci = -1;
1457 if (current_di >= 0) {
1458 approx_bci = mdo->data_at(current_di)->bci();
1459 }
1460 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1461 mdo->print_on(tty);
1462 method->print_codes();
1463 }
1464 assert(mdp == mdp2, "wrong mdp");
1465 IRT_END
1466 #endif // ASSERT
1467
1468 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1469 assert(ProfileInterpreter, "must be profiling interpreter");
1470 ResourceMark rm(thread);
1471 HandleMark hm(thread);
1472 LastFrameAccessor last_frame(thread);
1473 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1474 MethodData* h_mdo = last_frame.method()->method_data();
1475
1476 // Grab a lock to ensure atomic access to setting the return bci and
1477 // the displacement. This can block and GC, invalidating all naked oops.
1478 MutexLocker ml(RetData_lock);
1479
1480 // ProfileData is essentially a wrapper around a derived oop, so we
1481 // need to take the lock before making any ProfileData structures.
1482 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1483 guarantee(data != NULL, "profile data must be valid");
1484 RetData* rdata = data->as_RetData();
1485 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1486 last_frame.set_mdp(new_mdp);
1487 IRT_END
1488
1489 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1490 MethodCounters* mcs = Method::build_method_counters(m, thread);
1491 if (HAS_PENDING_EXCEPTION) {
1492 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1493 CLEAR_PENDING_EXCEPTION;
1494 }
1495 return mcs;
1496 IRT_END
1497
1498
1499 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1500 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1501 // stack traversal automatically takes care of preserving arguments for invoke, so
1502 // this is no longer needed.
1503
1504 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1505 // if this is called during a safepoint
1506
1507 if (JvmtiExport::should_post_single_step()) {
1508 // We are called during regular safepoints and when the VM is
1509 // single stepping. If any thread is marked for single stepping,
1510 // then we may have JVMTI work to do.
1511 LastFrameAccessor last_frame(thread);
1512 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1513 }
1514 IRT_END
1515
1516 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1517 ConstantPoolCacheEntry *cp_entry))
1518
1519 // check the access_flags for the field in the klass
1520
1521 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1522 int index = cp_entry->field_index();
1523 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1524
1525 bool is_static = (obj == NULL);
1526 HandleMark hm(thread);
1527
1528 Handle h_obj;
1529 if (!is_static) {
1530 // non-static field accessors have an object, but we need a handle
1531 h_obj = Handle(thread, obj);
1532 }
1533 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1534 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1535 LastFrameAccessor last_frame(thread);
1536 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1537 IRT_END
1538
1539 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1540 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1541
1542 Klass* k = cp_entry->f1_as_klass();
1543
1544 // check the access_flags for the field in the klass
1545 InstanceKlass* ik = InstanceKlass::cast(k);
1546 int index = cp_entry->field_index();
1547 // bail out if field modifications are not watched
1548 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1549
1550 char sig_type = '\0';
1551
1552 switch(cp_entry->flag_state()) {
1553 case btos: sig_type = 'B'; break;
1554 case ztos: sig_type = 'Z'; break;
1555 case ctos: sig_type = 'C'; break;
1556 case stos: sig_type = 'S'; break;
1557 case itos: sig_type = 'I'; break;
1558 case ftos: sig_type = 'F'; break;
1559 case atos: sig_type = 'L'; break;
1560 case ltos: sig_type = 'J'; break;
1561 case dtos: sig_type = 'D'; break;
1562 default: ShouldNotReachHere(); return;
1563 }
1564 bool is_static = (obj == NULL);
1565
1566 HandleMark hm(thread);
1567 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1568 jvalue fvalue;
1569 #ifdef _LP64
1570 fvalue = *value;
1571 #else
1572 // Long/double values are stored unaligned and also noncontiguously with
1573 // tagged stacks. We can't just do a simple assignment even in the non-
1574 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1575 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1576 // We assume that the two halves of longs/doubles are stored in interpreter
1577 // stack slots in platform-endian order.
1578 jlong_accessor u;
1579 jint* newval = (jint*)value;
1580 u.words[0] = newval[0];
1581 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1582 fvalue.j = u.long_value;
1583 #endif // _LP64
1584
1585 Handle h_obj;
1586 if (!is_static) {
1587 // non-static field accessors have an object, but we need a handle
1588 h_obj = Handle(thread, obj);
1589 }
1590
1591 LastFrameAccessor last_frame(thread);
1592 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1593 fid, sig_type, &fvalue);
1594 IRT_END
1595
1596 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1597 LastFrameAccessor last_frame(thread);
1598 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1599 IRT_END
1600
1601
1602 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1603 LastFrameAccessor last_frame(thread);
1604 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1605 IRT_END
1606
1607 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1608 {
1609 return (Interpreter::contains(pc) ? 1 : 0);
1610 }
1611 IRT_END
1612
1613
1614 // Implementation of SignatureHandlerLibrary
1615
1616 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1617 // Dummy definition (else normalization method is defined in CPU
1618 // dependant code)
1619 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1620 return fingerprint;
1621 }
1622 #endif
1623
1624 address SignatureHandlerLibrary::set_handler_blob() {
1625 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1626 if (handler_blob == NULL) {
1627 return NULL;
1628 }
1629 address handler = handler_blob->code_begin();
1630 _handler_blob = handler_blob;
1631 _handler = handler;
1632 return handler;
1633 }
1634
1635 void SignatureHandlerLibrary::initialize() {
1636 if (_fingerprints != NULL) {
1637 return;
1638 }
1639 if (set_handler_blob() == NULL) {
1640 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1641 }
1642
1643 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1644 SignatureHandlerLibrary::buffer_size);
1645 _buffer = bb->code_begin();
1646
1647 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1648 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1649 }
1650
1651 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1652 address handler = _handler;
1653 int insts_size = buffer->pure_insts_size();
1654 if (handler + insts_size > _handler_blob->code_end()) {
1655 // get a new handler blob
1656 handler = set_handler_blob();
1657 }
1658 if (handler != NULL) {
1659 memcpy(handler, buffer->insts_begin(), insts_size);
1660 pd_set_handler(handler);
1661 ICache::invalidate_range(handler, insts_size);
1662 _handler = handler + insts_size;
1663 }
1664 return handler;
1665 }
1666
1667 void SignatureHandlerLibrary::add(const methodHandle& method) {
1668 if (method->signature_handler() == NULL) {
1669 // use slow signature handler if we can't do better
1670 int handler_index = -1;
1671 // check if we can use customized (fast) signature handler
1672 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1673 // use customized signature handler
1674 MutexLocker mu(SignatureHandlerLibrary_lock);
1675 // make sure data structure is initialized
1676 initialize();
1677 // lookup method signature's fingerprint
1678 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1679 // allow CPU dependant code to optimize the fingerprints for the fast handler
1680 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1681 handler_index = _fingerprints->find(fingerprint);
1682 // create handler if necessary
1683 if (handler_index < 0) {
1684 ResourceMark rm;
1685 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1686 CodeBuffer buffer((address)(_buffer + align_offset),
1687 SignatureHandlerLibrary::buffer_size - align_offset);
1688 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1689 // copy into code heap
1690 address handler = set_handler(&buffer);
1691 if (handler == NULL) {
1692 // use slow signature handler (without memorizing it in the fingerprints)
1693 } else {
1694 // debugging suppport
1695 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1696 ttyLocker ttyl;
1697 tty->cr();
1698 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1699 _handlers->length(),
1700 (method->is_static() ? "static" : "receiver"),
1701 method->name_and_sig_as_C_string(),
1702 fingerprint,
1703 buffer.insts_size());
1704 if (buffer.insts_size() > 0) {
1705 Disassembler::decode(handler, handler + buffer.insts_size());
1706 }
1707 #ifndef PRODUCT
1708 address rh_begin = Interpreter::result_handler(method()->result_type());
1709 if (CodeCache::contains(rh_begin)) {
1710 // else it might be special platform dependent values
1711 tty->print_cr(" --- associated result handler ---");
1712 address rh_end = rh_begin;
1713 while (*(int*)rh_end != 0) {
1714 rh_end += sizeof(int);
1715 }
1716 Disassembler::decode(rh_begin, rh_end);
1717 } else {
1718 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1719 }
1720 #endif
1721 }
1722 // add handler to library
1723 _fingerprints->append(fingerprint);
1724 _handlers->append(handler);
1725 // set handler index
1726 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1727 handler_index = _fingerprints->length() - 1;
1728 }
1729 }
1730 // Set handler under SignatureHandlerLibrary_lock
1731 if (handler_index < 0) {
1732 // use generic signature handler
1733 method->set_signature_handler(Interpreter::slow_signature_handler());
1734 } else {
1735 // set handler
1736 method->set_signature_handler(_handlers->at(handler_index));
1737 }
1738 } else {
1739 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1740 // use generic signature handler
1741 method->set_signature_handler(Interpreter::slow_signature_handler());
1742 }
1743 }
1744 #ifdef ASSERT
1745 int handler_index = -1;
1746 int fingerprint_index = -2;
1747 {
1748 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1749 // in any way if accessed from multiple threads. To avoid races with another
1750 // thread which may change the arrays in the above, mutex protected block, we
1751 // have to protect this read access here with the same mutex as well!
1752 MutexLocker mu(SignatureHandlerLibrary_lock);
1753 if (_handlers != NULL) {
1754 handler_index = _handlers->find(method->signature_handler());
1755 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1756 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1757 fingerprint_index = _fingerprints->find(fingerprint);
1758 }
1759 }
1760 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1761 handler_index == fingerprint_index, "sanity check");
1762 #endif // ASSERT
1763 }
1764
1765 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1766 int handler_index = -1;
1767 // use customized signature handler
1768 MutexLocker mu(SignatureHandlerLibrary_lock);
1769 // make sure data structure is initialized
1770 initialize();
1771 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1772 handler_index = _fingerprints->find(fingerprint);
1773 // create handler if necessary
1774 if (handler_index < 0) {
1775 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1776 tty->cr();
1777 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1778 _handlers->length(),
1779 p2i(handler),
1780 fingerprint);
1781 }
1782 _fingerprints->append(fingerprint);
1783 _handlers->append(handler);
1784 } else {
1785 if (PrintSignatureHandlers) {
1786 tty->cr();
1787 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1788 _handlers->length(),
1789 fingerprint,
1790 p2i(_handlers->at(handler_index)),
1791 p2i(handler));
1792 }
1793 }
1794 }
1795
1796
1797 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1798 address SignatureHandlerLibrary::_handler = NULL;
1799 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1800 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1801 address SignatureHandlerLibrary::_buffer = NULL;
1802
1803
1804 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1805 methodHandle m(thread, method);
1806 assert(m->is_native(), "sanity check");
1807 // lookup native function entry point if it doesn't exist
1808 bool in_base_library;
1809 if (!m->has_native_function()) {
1810 NativeLookup::lookup(m, in_base_library, CHECK);
1811 }
1812 // make sure signature handler is installed
1813 SignatureHandlerLibrary::add(m);
1814 // The interpreter entry point checks the signature handler first,
1815 // before trying to fetch the native entry point and klass mirror.
1816 // We must set the signature handler last, so that multiple processors
1817 // preparing the same method will be sure to see non-null entry & mirror.
1818 IRT_END
1819
1820 #if defined(IA32) || defined(AMD64) || defined(ARM)
1821 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1822 if (src_address == dest_address) {
1823 return;
1824 }
1825 ResetNoHandleMark rnm; // In a LEAF entry.
1826 HandleMark hm;
1827 ResourceMark rm;
1828 LastFrameAccessor last_frame(thread);
1829 assert(last_frame.is_interpreted_frame(), "");
1830 jint bci = last_frame.bci();
1831 methodHandle mh(thread, last_frame.method());
1832 Bytecode_invoke invoke(mh, bci);
1833 ArgumentSizeComputer asc(invoke.signature());
1834 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1835 Copy::conjoint_jbytes(src_address, dest_address,
1836 size_of_arguments * Interpreter::stackElementSize);
1837 IRT_END
1838 #endif
1839
1840 #if INCLUDE_JVMTI
1841 // This is a support of the JVMTI PopFrame interface.
1842 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1843 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1844 // The member_name argument is a saved reference (in local#0) to the member_name.
1845 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1846 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1847 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1848 Method* method, address bcp))
1849 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1850 if (code != Bytecodes::_invokestatic) {
1851 return;
1852 }
1853 ConstantPool* cpool = method->constants();
1854 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1855 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1856 Symbol* mname = cpool->name_ref_at(cp_index);
1857
1858 if (MethodHandles::has_member_arg(cname, mname)) {
1859 oop member_name_oop = (oop) member_name;
1860 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1861 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1862 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1863 }
1864 thread->set_vm_result(member_name_oop);
1865 } else {
1866 thread->set_vm_result(NULL);
1867 }
1868 IRT_END
1869 #endif // INCLUDE_JVMTI
1870
1871 #ifndef PRODUCT
1872 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1873 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1874 // The generated code still uses call_VM because that will set up the frame pointer for
1875 // bcp and method.
1876 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1877 LastFrameAccessor last_frame(thread);
1878 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1879 methodHandle mh(thread, last_frame.method());
1880 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1881 return preserve_this_value;
1882 IRT_END
1883 #endif // !PRODUCT