1 /*
2 * Copyright (c) 1997, 2018, 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(), "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::_ldc ||
127 bytecode == Bytecodes::_ldc_w ||
128 bytecode == Bytecodes::_ldc2_w ||
129 bytecode == Bytecodes::_fast_aldc ||
130 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
131 ResourceMark rm(thread);
132 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
133 bytecode == Bytecodes::_fast_aldc_w);
134 LastFrameAccessor last_frame(thread);
135 methodHandle m (thread, last_frame.method());
136 Bytecode_loadconstant ldc(m, last_frame.bci());
137
138 // Double-check the size. (Condy can have any type.)
139 BasicType type = ldc.result_type();
140 switch (type2size[type]) {
141 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
142 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
143 default: ShouldNotReachHere();
144 }
145
146 // Resolve the constant. This does not do unboxing.
147 // But it does replace Universe::the_null_sentinel by null.
148 oop result = ldc.resolve_constant(CHECK);
149 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
150
151 #ifdef ASSERT
152 {
153 // The bytecode wrappers aren't GC-safe so construct a new one
154 Bytecode_loadconstant ldc2(m, last_frame.bci());
155 int rindex = ldc2.cache_index();
156 if (rindex < 0)
157 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
158 if (rindex >= 0) {
159 oop coop = m->constants()->resolved_references()->obj_at(rindex);
160 oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
161 assert(roop == coop, "expected result for assembly code");
162 }
163 }
164 #endif
165 thread->set_vm_result(result);
166 if (!is_fast_aldc) {
167 // Tell the interpreter how to unbox the primitive.
168 guarantee(java_lang_boxing_object::is_instance(result, type), "");
169 int offset = java_lang_boxing_object::value_offset_in_bytes(type);
170 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
171 | (offset & ConstantPoolCacheEntry::field_index_mask));
172 thread->set_vm_result_2((Metadata*)flags);
173 }
174 }
175 IRT_END
176
177
178 //------------------------------------------------------------------------------------------------------------------------
179 // Allocation
180
181 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
182 Klass* k = pool->klass_at(index, CHECK);
183 InstanceKlass* klass = InstanceKlass::cast(k);
184
185 // Make sure we are not instantiating an abstract klass
186 klass->check_valid_for_instantiation(true, CHECK);
187
188 // Make sure klass is initialized
189 klass->initialize(CHECK);
190
191 // At this point the class may not be fully initialized
192 // because of recursive initialization. If it is fully
193 // initialized & has_finalized is not set, we rewrite
194 // it into its fast version (Note: no locking is needed
195 // here since this is an atomic byte write and can be
196 // done more than once).
197 //
198 // Note: In case of classes with has_finalized we don't
199 // rewrite since that saves us an extra check in
200 // the fast version which then would call the
201 // slow version anyway (and do a call back into
202 // Java).
203 // If we have a breakpoint, then we don't rewrite
204 // because the _breakpoint bytecode would be lost.
205 oop obj = klass->allocate_instance(CHECK);
206 thread->set_vm_result(obj);
207 IRT_END
208
209 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) {
210 switch (type) {
211 case T_BOOLEAN:
212 instance()->bool_field_put(offset, (jboolean)*((int*)addr));
213 break;
214 case T_CHAR:
215 instance()->char_field_put(offset, (jchar) *((int*)addr));
216 break;
217 case T_FLOAT:
218 instance()->float_field_put(offset, (jfloat)*((float*)addr));
219 break;
220 case T_DOUBLE:
221 instance()->double_field_put(offset, (jdouble)*((double*)addr));
222 break;
223 case T_BYTE:
224 instance()->byte_field_put(offset, (jbyte)*((int*)addr));
225 break;
226 case T_SHORT:
227 instance()->short_field_put(offset, (jshort)*((int*)addr));
228 break;
229 case T_INT:
230 instance()->int_field_put(offset, (jint)*((int*)addr));
231 break;
232 case T_LONG:
233 instance()->long_field_put(offset, (jlong)*((long long*)addr));
234 break;
235 case T_OBJECT:
236 case T_ARRAY:
237 case T_VALUETYPE:
238 fatal("Should not be handled with this method");
239 break;
240 default:
241 fatal("Unsupported BasicType");
242 }
243 }
244
245 IRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* thread, ConstantPool* pool, int index))
246 // Getting the ValueKlass
247 Klass* k = pool->klass_at(index, CHECK);
248 assert(k->is_value(), "defaultvalue argument must be the value type class");
249 ValueKlass* vklass = ValueKlass::cast(k);
250
251 vklass->initialize(THREAD);
252 oop res = vklass->default_value();
253 thread->set_vm_result(res);
254 IRT_END
255
256 IRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* thread, ConstantPoolCache* cp_cache))
257 LastFrameAccessor last_frame(thread);
258 // Getting the ValueKlass
259 int index = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_withfield));
260 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
261 assert(cp_entry->is_resolved(Bytecodes::_withfield), "Should have been resolved");
262 Klass* klass = cp_entry->f1_as_klass();
263 assert(klass->is_value(), "withfield only applies to value types");
264 ValueKlass* vklass = ValueKlass::cast(klass);
265
266 // Getting Field information
267 int offset = cp_entry->f2_as_index();
268 int field_index = cp_entry->field_index();
269 int field_offset = cp_entry->f2_as_offset();
270 Symbol* field_signature = vklass->field_signature(field_index);
271 ResourceMark rm(THREAD);
272 const char* signature = (const char *) field_signature->as_utf8();
273 BasicType field_type = char2type(signature[0]);
274
275 // Getting old value
276 frame& f = last_frame.get_frame();
277 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1;
278 int vt_offset = type2size[field_type];
279 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset);
280 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver");
281 Handle old_value_h(THREAD, old_value);
282
283 // Creating new value by copying the one passed in argument
284 bool in_heap;
285 instanceOop new_value = vklass->allocate_buffered_or_heap_instance(&in_heap,
286 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
287 Handle new_value_h = Handle(THREAD, new_value);
288 int first_offset = vklass->first_field_offset();
289 vklass->value_store(vklass->data_for_oop(old_value_h()),
290 vklass->data_for_oop(new_value_h()), in_heap, false);
291
292 // Updating the field specified in arguments
293 if (field_type == T_ARRAY) {
294 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
295 assert(aoop == NULL || oopDesc::is_oop(aoop),"argument must be a reference type");
296 if (in_heap) {
297 new_value_h()->obj_field_put(field_offset, aoop);
298 } else {
299 new_value_h()->obj_field_put_raw(field_offset, aoop);
300 }
301 } else if (field_type == T_OBJECT) {
302 // Logic below is optimized
303 // Null checks for non flattenable fields have already be performed in the assembly template
304 // of the interpreter, which reduces the number of possible cases:
305 // 1 - flattened or not flattened
306 // 2 - if not flattened: argument is buffered (value) or in heap (value and objects)
307 if (cp_entry->is_flattened()) {
308 Klass* field_k = vklass->get_value_field_klass(field_index);
309 ValueKlass* field_vk = ValueKlass::cast(field_k);
310 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
311 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type");
312 assert(field_vk == vt_oop->klass(), "Must match");
313 field_vk->value_store(field_vk->data_for_oop(vt_oop),
314 ((char*)(oopDesc*)new_value_h()) + field_offset, in_heap, false);
315 } else { // not flattened
316 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
317 assert(voop != NULL || !cp_entry->is_flattenable(),
318 "NULL checks for non flattenable fields must have been performed in interpreter assembly template");
319 assert(voop == NULL || oopDesc::is_oop(voop),"checking argument");
320 if (VTBuffer::is_in_vt_buffer(voop)) {
321 // new value field is currently allocated in a TLVB, a heap allocated
322 // copy must be created because a field must never point to a TLVB allocated value
323 Handle voop_h = Handle(THREAD, voop);
324 ValueKlass* field_vk = ValueKlass::cast(voop->klass());
325 assert(field_vk == vklass->get_value_field_klass(field_index), "Sanity check");
326 instanceOop field_copy = field_vk->allocate_instance(CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
327 Handle field_copy_h = Handle(THREAD, field_copy);
328 field_vk->value_store(field_vk->data_for_oop(voop_h()), field_vk->data_for_oop(field_copy_h()), true, false);
329 if (in_heap) {
330 new_value_h()->obj_field_put(field_offset, field_copy_h());
331 } else {
332 new_value_h()->obj_field_put_raw(field_offset, field_copy_h());
333 }
334 } else { // not buffered
335 if (in_heap) {
336 new_value_h()->obj_field_put(field_offset, voop);
337 } else {
338 new_value_h()->obj_field_put_raw(field_offset, voop);
339 }
340 }
341 }
342 } else { // not T_OBJECT nor T_ARRAY
343 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx);
344 copy_primitive_argument(addr, new_value_h, field_offset, field_type);
345 }
346
347 // returning result
348 thread->set_vm_result(new_value_h());
349 return (type2size[field_type] + type2size[T_OBJECT]) * AbstractInterpreter::stackElementSize;
350 IRT_END
351
352 IRT_ENTRY(void, InterpreterRuntime::qgetfield(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder))
353 Handle value_h(THREAD, obj);
354 InstanceKlass* klass = InstanceKlass::cast(field_holder);
355
356 Klass* field_k = klass->get_value_field_klass(index);
357 ValueKlass* field_vklass = ValueKlass::cast(field_k);
358 field_vklass->initialize(THREAD);
359
360 instanceOop res;
361 bool in_heap;
362 if (klass->field_is_flattened(index)) {
363 // allocate instance
364 res = field_vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
365 instanceHandle res_h(THREAD, res);
366 // copy value
367 field_vklass->value_store(((char*)(oopDesc*)value_h()) + klass->field_offset(index),
368 field_vklass->data_for_oop(res), in_heap, false);
369 thread->set_vm_result(res_h());
370 } else {
371 oop res = value_h()->obj_field_acquire(klass->field_offset(index));
372 if (res == NULL) {
373 res = field_vklass->default_value();
374 } else {
375 assert(res->klass() == field_k, "Sanity check");
376 assert(!VTBuffer::is_in_vt_buffer(res), "Sanity check");
377 }
378 thread->set_vm_result(res);
379 }
380 assert(thread->vm_result()->klass() == field_vklass, "sanity check");
381 IRT_END
382
383 IRT_ENTRY(void, InterpreterRuntime::uninitialized_static_value_field(JavaThread* thread, oopDesc* mirror, int index))
384 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
385 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
386 int offset = klass->field_offset(index);
387 Klass* field_k = klass->get_value_field_klass_or_null(index);
388 assert(field_k != NULL, "Must have been initialized");
389 ValueKlass* field_vklass = ValueKlass::cast(field_k);
390 instanceOop res = (instanceOop)field_vklass->default_value();
391 thread->set_vm_result(res);
392 IRT_END
393
394 IRT_ENTRY(void, InterpreterRuntime::uninitialized_instance_value_field(JavaThread* thread, oopDesc* obj, int index))
395 instanceHandle obj_h(THREAD, (instanceOop)obj);
396 InstanceKlass* klass = InstanceKlass::cast(obj_h()->klass());
397 int offset = klass->field_offset(index);
398 Klass* field_k = klass->get_value_field_klass_or_null(index);
399 assert(field_k != NULL, "Must have been initialized");
400 ValueKlass* field_vklass = ValueKlass::cast(field_k);
401 instanceOop res = (instanceOop)field_vklass->default_value();
402 thread->set_vm_result(res);
403 IRT_END
404
405 IRT_ENTRY(void, InterpreterRuntime::write_heap_copy(JavaThread* thread, oopDesc* value, int offset, oopDesc* rcv))
406 assert(VTBuffer::is_in_vt_buffer(value), "Should only be called for buffered values");
407 Handle val_h(THREAD, value);
408 ValueKlass* vk = ValueKlass::cast(val_h()->klass());
409 instanceOop res = vk->allocate_instance(CHECK);
410 Handle res_h(THREAD, res);
411 // copy value
412 vk->value_store(vk->data_for_oop(val_h()),
413 vk->data_for_oop(res_h()), true, false);
414 ((instanceOop)rcv)->obj_field_put(offset, res_h());
415 IRT_END
416
417 IRT_ENTRY(void, InterpreterRuntime::qputfield(JavaThread* thread, oopDesc* obj, oopDesc* value, ConstantPoolCache* cp_cache))
418 LastFrameAccessor last_frame(thread);
419 Handle value_h(THREAD, value);
420 Handle obj_h(THREAD, obj);
421 assert(!obj_h()->klass()->is_value(), "obj must be an object");
422 assert(value_h()->klass()->is_value(), "value must be an value type");
423
424 int idx = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_putfield));
425 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(idx);
426
427 int index = cp_entry->field_index();
428 bool flatten = cp_entry->is_flattened();
429
430 InstanceKlass* klass = InstanceKlass::cast(cp_entry->f1_as_klass());
431 Klass* field_k = klass->get_value_field_klass(index);
432 ValueKlass* field_vklass = ValueKlass::cast(value->klass());
433 assert(value_h()->klass() == field_k, "Sanity check");
434 assert(field_k == field_vklass, "Field descriptor and argument must match");
435 if (flatten) {
436 // copy value
437 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
438 ((char*)(oopDesc*)obj_h()) + klass->field_offset(index), true, false);
439 } else {
440 if (!VTBuffer::is_in_vt_buffer(value_h())) {
441 obj_h()->obj_field_put(klass->field_offset(index), value_h());
442 } else {
443 // allocate heap instance
444 instanceOop val = field_vklass->allocate_instance(CHECK);
445 instanceHandle res_h(THREAD, val);
446 // copy value
447 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
448 field_vklass->data_for_oop(res_h()), true, false);
449
450
451 obj_h()->obj_field_put(klass->field_offset(index), res_h());
452 }
453 }
454 IRT_END
455
456 IRT_ENTRY(void, InterpreterRuntime::qputstatic(JavaThread* thread, oopDesc* value, int offset, oopDesc* mirror))
457 instanceHandle value_h(THREAD, (instanceOop)value);
458 assert(value_h()->is_value(), "qputstatic only deals with value arguments");
459 if (!VTBuffer::is_in_vt_buffer(value_h())) {
460 mirror->obj_field_put(offset, value_h());
461 } else {
462 // The argument is a buffered value, a copy must be created in the Java heap
463 // because a static field cannot point to a thread-local buffered value
464 ValueKlass* field_vklass = ValueKlass::cast(value_h()->klass());
465 Handle mirror_h(THREAD, mirror);
466 // allocate heap instance
467 instanceOop res = field_vklass->allocate_instance(CHECK);
468 assert(Universe::heap()->is_in_reserved(res), "Must be in the Java heap");
469 instanceHandle res_h(THREAD, res);
470 // copy value
471 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
472 field_vklass->data_for_oop(res), true, false);
473 // writing static field
474 mirror_h->obj_field_put(offset, res_h());
475 assert(mirror_h->obj_field(offset) != NULL,"Sanity check");
476 }
477 IRT_END
478
479 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
480 oop obj = oopFactory::new_typeArray(type, size, CHECK);
481 thread->set_vm_result(obj);
482 IRT_END
483
484
485 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
486 Klass* klass = pool->klass_at(index, CHECK);
487 if (klass->is_value()) { // Logically creates elements, ensure klass init
488 klass->initialize(CHECK);
489 }
490 arrayOop obj = oopFactory::new_array(klass, size, CHECK);
491 thread->set_vm_result(obj);
492 IRT_END
493
494 IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
495 Klass* klass = array->klass();
496 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
497
498 if (klass->is_objArray_klass()) {
499 thread->set_vm_result(((objArrayOop) array)->obj_at(index));
500 } else {
501 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
502 ValueKlass* vklass = vaklass->element_klass();
503 arrayHandle ah(THREAD, array);
504 bool in_heap;
505 instanceOop value_holder = vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
506 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper());
507 vklass->value_store(src, vklass->data_for_oop(value_holder),
508 vaklass->element_byte_size(), in_heap, false);
509 thread->set_vm_result(value_holder);
510 }
511 IRT_END
512
513 IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, arrayOopDesc* array, int index, void* val))
514 Klass* klass = array->klass();
515 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
516 Handle array_h(THREAD, array);
517
518 if (ArrayKlass::cast(klass)->element_klass() != ((oop)val)->klass()) {
519 THROW(vmSymbols::java_lang_ArrayStoreException());
520 }
521 if (klass->is_objArray_klass()) {
522 if(VTBuffer::is_in_vt_buffer(val)) {
523 // A Java heap allocated copy must be made because an array cannot
524 // reference a thread-local buffered value
525 Handle val_h(THREAD, (oop)val);
526 ObjArrayKlass* aklass = ObjArrayKlass::cast(klass);
527 Klass* eklass = aklass->element_klass();
528 assert(eklass->is_value(), "Sanity check");
529 assert(eklass == ((oop)val)->klass(), "Sanity check");
530 ValueKlass* vklass = ValueKlass::cast(eklass);
531 // allocate heap instance
532 instanceOop res = vklass->allocate_instance(CHECK);
533 Handle res_h(THREAD, res);
534 // copy value
535 vklass->value_store(((char*)(oopDesc*)val_h()) + vklass->first_field_offset(),
536 ((char*)(oopDesc*)res_h()) + vklass->first_field_offset(),true, false);
537 val = res_h();
538 }
539 ((objArrayOop) array_h())->obj_at_put(index, (oop)val);
540 } else {
541 valueArrayOop varray = (valueArrayOop)array;
542 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
543 ValueKlass* vklass = vaklass->element_klass();
544 const int lh = vaklass->layout_helper();
545 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
546 vaklass->element_byte_size(), true, false);
547 }
548 IRT_END
549
550 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
551 // We may want to pass in more arguments - could make this slightly faster
552 LastFrameAccessor last_frame(thread);
553 ConstantPool* constants = last_frame.method()->constants();
554 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
555 Klass* klass = constants->klass_at(i, CHECK);
556 int nof_dims = last_frame.number_of_dimensions();
557 assert(klass->is_klass(), "not a class");
558 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
559
560 if (klass->is_value()) { // Logically creates elements, ensure klass init
561 klass->initialize(CHECK);
562 }
563
564 // We must create an array of jints to pass to multi_allocate.
565 ResourceMark rm(thread);
566 const int small_dims = 10;
567 jint dim_array[small_dims];
568 jint *dims = &dim_array[0];
569 if (nof_dims > small_dims) {
570 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
571 }
572 for (int index = 0; index < nof_dims; index++) {
573 // offset from first_size_address is addressed as local[index]
574 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
575 dims[index] = first_size_address[n];
576 }
577 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
578 thread->set_vm_result(obj);
579 IRT_END
580
581 IRT_LEAF(void, InterpreterRuntime::recycle_vtbuffer(void* alloc_ptr))
582 JavaThread* thread = (JavaThread*)Thread::current();
583 VTBuffer::recycle_vtbuffer(thread, alloc_ptr);
584 IRT_END
585
586 IRT_ENTRY(void, InterpreterRuntime::recycle_buffered_values(JavaThread* thread))
587 frame f = thread->last_frame();
588 assert(f.is_interpreted_frame(), "recycling can only be triggered from interpreted frames");
589 VTBuffer::recycle_vt_in_frame(thread, &f);
590 IRT_END
591
592 IRT_ENTRY(void, InterpreterRuntime::fix_frame_vt_alloc_ptr(JavaThread* thread))
593 frame f = thread->last_frame();
594 VTBuffer::fix_frame_vt_alloc_ptr(f, VTBufferChunk::chunk(thread->vt_alloc_ptr()));
595 IRT_END
596
597 IRT_ENTRY(void, InterpreterRuntime::return_value(JavaThread* thread, oopDesc* obj))
598 assert(VTBuffer::is_in_vt_buffer(obj), "Must only be called for buffered values");
599 assert(obj->klass()->is_value(), "Sanity check");
600 ValueKlass* vk = ValueKlass::cast(obj->klass());
601 RegisterMap reg_map(thread, false);
602 frame current_frame = thread->last_frame();
603 frame caller_frame = current_frame.sender(®_map);
604 if (!caller_frame.is_interpreted_frame()) {
605 // caller is not an interpreted frame, creating a new value in Java heap
606 Handle obj_h(THREAD, obj);
607 instanceOop res = vk->allocate_instance(CHECK);
608 Handle res_h(THREAD, res);
609 // copy value
610 vk->value_store(vk->data_for_oop(obj_h()),
611 vk->data_for_oop(res_h()), true, false);
612 thread->set_vm_result(res_h());
613 return;
614 } else {
615 // A buffered value is being returned to an interpreted frame,
616 // but the work has to be delayed to remove_activation() because
617 // the frame cannot be modified now (GC can run at the safepoint
618 // when exiting runtime, and frame layout must be kept consistent
619 // with the OopMap).
620 thread->set_return_buffered_value(obj);
621 thread->set_vm_result(obj);
622 }
623 IRT_END
624
625 IRT_LEAF(void, InterpreterRuntime::return_value_step2(oopDesc* obj, void* alloc_ptr))
626
627 JavaThread* thread = (JavaThread*)Thread::current();
628 assert(obj == thread->return_buffered_value(), "Consistency check");
629 assert(!Universe::heap()->is_in_reserved(obj), "Should only apply to buffered values");
630
631 oop dest = VTBuffer::relocate_return_value(thread, alloc_ptr, obj);
632 thread->set_return_buffered_value(NULL);
633 thread->set_vm_result(dest);
634 IRT_END
635
636 IRT_ENTRY(void, InterpreterRuntime::check_areturn(JavaThread* thread, oopDesc* obj))
637 if (obj != NULL) {
638 Klass* k = obj->klass();
639 if (k->is_value()) {
640 // ResourceMark rm(thread);
641 // tty->print_cr("areturn used on a value from %s", k->name()->as_C_string());
642 }
643 }
644 thread->set_vm_result(obj);
645 IRT_END
646
647 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
648 assert(oopDesc::is_oop(obj), "must be a valid oop");
649 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
650 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
651 IRT_END
652
653
654 // Quicken instance-of and check-cast bytecodes
655 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
656 // Force resolving; quicken the bytecode
657 LastFrameAccessor last_frame(thread);
658 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
659 ConstantPool* cpool = last_frame.method()->constants();
660 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
661 // program we might have seen an unquick'd bytecode in the interpreter but have another
662 // thread quicken the bytecode before we get here.
663 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
664 Klass* klass = cpool->klass_at(which, CHECK);
665 thread->set_vm_result_2(klass);
666 IRT_END
667
668
669 //------------------------------------------------------------------------------------------------------------------------
670 // Exceptions
671
672 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
673 const methodHandle& trap_method, int trap_bci, TRAPS) {
674 if (trap_method.not_null()) {
675 MethodData* trap_mdo = trap_method->method_data();
676 if (trap_mdo == NULL) {
677 Method::build_interpreter_method_data(trap_method, THREAD);
678 if (HAS_PENDING_EXCEPTION) {
679 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
680 "we expect only an OOM error here");
681 CLEAR_PENDING_EXCEPTION;
682 }
683 trap_mdo = trap_method->method_data();
684 // and fall through...
685 }
686 if (trap_mdo != NULL) {
687 // Update per-method count of trap events. The interpreter
688 // is updating the MDO to simulate the effect of compiler traps.
689 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
690 }
691 }
692 }
693
694 // Assume the compiler is (or will be) interested in this event.
695 // If necessary, create an MDO to hold the information, and record it.
696 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
697 assert(ProfileTraps, "call me only if profiling");
698 LastFrameAccessor last_frame(thread);
699 methodHandle trap_method(thread, last_frame.method());
700 int trap_bci = trap_method->bci_from(last_frame.bcp());
701 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
702 }
703
704 #ifdef CC_INTERP
705 // As legacy note_trap, but we have more arguments.
706 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
707 methodHandle trap_method(method);
708 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
709 IRT_END
710
711 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
712 // for each exception.
713 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
714 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
715 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
716 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
717 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
718 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
719 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
720 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
721 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
722 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
723 #endif // CC_INTERP
724
725
726 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
727 // get klass
728 InstanceKlass* klass = InstanceKlass::cast(k);
729 assert(klass->is_initialized(),
730 "this klass should have been initialized during VM initialization");
731 // create instance - do not call constructor since we may have no
732 // (java) stack space left (should assert constructor is empty)
733 Handle exception;
734 oop exception_oop = klass->allocate_instance(CHECK_(exception));
735 exception = Handle(THREAD, exception_oop);
736 if (StackTraceInThrowable) {
737 java_lang_Throwable::fill_in_stack_trace(exception);
738 }
739 return exception;
740 }
741
742 // Special handling for stack overflow: since we don't have any (java) stack
743 // space left we use the pre-allocated & pre-initialized StackOverflowError
744 // klass to create an stack overflow error instance. We do not call its
745 // constructor for the same reason (it is empty, anyway).
746 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
747 Handle exception = get_preinitialized_exception(
748 SystemDictionary::StackOverflowError_klass(),
749 CHECK);
750 // Increment counter for hs_err file reporting
751 Atomic::inc(&Exceptions::_stack_overflow_errors);
752 THROW_HANDLE(exception);
753 IRT_END
754
755 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
756 Handle exception = get_preinitialized_exception(
757 SystemDictionary::StackOverflowError_klass(),
758 CHECK);
759 java_lang_Throwable::set_message(exception(),
760 Universe::delayed_stack_overflow_error_message());
761 // Increment counter for hs_err file reporting
762 Atomic::inc(&Exceptions::_stack_overflow_errors);
763 THROW_HANDLE(exception);
764 IRT_END
765
766 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
767 // lookup exception klass
768 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
769 if (ProfileTraps) {
770 if (s == vmSymbols::java_lang_ArithmeticException()) {
771 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
772 } else if (s == vmSymbols::java_lang_NullPointerException()) {
773 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
774 }
775 }
776 // create exception
777 Handle exception = Exceptions::new_exception(thread, s, message);
778 thread->set_vm_result(exception());
779 IRT_END
780
781
782 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
783 ResourceMark rm(thread);
784 const char* klass_name = obj->klass()->external_name();
785 // lookup exception klass
786 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
787 if (ProfileTraps) {
788 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
789 }
790 // create exception, with klass name as detail message
791 Handle exception = Exceptions::new_exception(thread, s, klass_name);
792 thread->set_vm_result(exception());
793 IRT_END
794
795
796 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
797 char message[jintAsStringSize];
798 // lookup exception klass
799 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
800 if (ProfileTraps) {
801 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
802 }
803 // create exception
804 sprintf(message, "%d", index);
805 THROW_MSG(s, message);
806 IRT_END
807
808 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
809 JavaThread* thread, oopDesc* obj))
810
811 ResourceMark rm(thread);
812 char* message = SharedRuntime::generate_class_cast_message(
813 thread, obj->klass());
814
815 if (ProfileTraps) {
816 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
817 }
818
819 // create exception
820 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
821 IRT_END
822
823 // exception_handler_for_exception(...) returns the continuation address,
824 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
825 // The exception oop is returned to make sure it is preserved over GC (it
826 // is only on the stack if the exception was thrown explicitly via athrow).
827 // During this operation, the expression stack contains the values for the
828 // bci where the exception happened. If the exception was propagated back
829 // from a call, the expression stack contains the values for the bci at the
830 // invoke w/o arguments (i.e., as if one were inside the call).
831 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
832
833 LastFrameAccessor last_frame(thread);
834 Handle h_exception(thread, exception);
835 methodHandle h_method (thread, last_frame.method());
836 constantPoolHandle h_constants(thread, h_method->constants());
837 bool should_repeat;
838 int handler_bci;
839 int current_bci = last_frame.bci();
840
841 if (thread->frames_to_pop_failed_realloc() > 0) {
842 // Allocation of scalar replaced object used in this frame
843 // failed. Unconditionally pop the frame.
844 thread->dec_frames_to_pop_failed_realloc();
845 thread->set_vm_result(h_exception());
846 // If the method is synchronized we already unlocked the monitor
847 // during deoptimization so the interpreter needs to skip it when
848 // the frame is popped.
849 thread->set_do_not_unlock_if_synchronized(true);
850 #ifdef CC_INTERP
851 return (address) -1;
852 #else
853 return Interpreter::remove_activation_entry();
854 #endif
855 }
856
857 // Need to do this check first since when _do_not_unlock_if_synchronized
858 // is set, we don't want to trigger any classloading which may make calls
859 // into java, or surprisingly find a matching exception handler for bci 0
860 // since at this moment the method hasn't been "officially" entered yet.
861 if (thread->do_not_unlock_if_synchronized()) {
862 ResourceMark rm;
863 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
864 thread->set_vm_result(exception);
865 #ifdef CC_INTERP
866 return (address) -1;
867 #else
868 return Interpreter::remove_activation_entry();
869 #endif
870 }
871
872 do {
873 should_repeat = false;
874
875 // assertions
876 #ifdef ASSERT
877 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
878 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
879 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
880 if (ExitVMOnVerifyError) vm_exit(-1);
881 ShouldNotReachHere();
882 }
883 #endif
884
885 // tracing
886 if (log_is_enabled(Info, exceptions)) {
887 ResourceMark rm(thread);
888 stringStream tempst;
889 tempst.print("interpreter method <%s>\n"
890 " at bci %d for thread " INTPTR_FORMAT,
891 h_method->print_value_string(), current_bci, p2i(thread));
892 Exceptions::log_exception(h_exception, tempst);
893 }
894 // Don't go paging in something which won't be used.
895 // else if (extable->length() == 0) {
896 // // disabled for now - interpreter is not using shortcut yet
897 // // (shortcut is not to call runtime if we have no exception handlers)
898 // // warning("performance bug: should not call runtime if method has no exception handlers");
899 // }
900 // for AbortVMOnException flag
901 Exceptions::debug_check_abort(h_exception);
902
903 // exception handler lookup
904 Klass* klass = h_exception->klass();
905 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
906 if (HAS_PENDING_EXCEPTION) {
907 // We threw an exception while trying to find the exception handler.
908 // Transfer the new exception to the exception handle which will
909 // be set into thread local storage, and do another lookup for an
910 // exception handler for this exception, this time starting at the
911 // BCI of the exception handler which caused the exception to be
912 // thrown (bug 4307310).
913 h_exception = Handle(THREAD, PENDING_EXCEPTION);
914 CLEAR_PENDING_EXCEPTION;
915 if (handler_bci >= 0) {
916 current_bci = handler_bci;
917 should_repeat = true;
918 }
919 }
920 } while (should_repeat == true);
921
922 #if INCLUDE_JVMCI
923 if (EnableJVMCI && h_method->method_data() != NULL) {
924 ResourceMark rm(thread);
925 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
926 if (pdata != NULL && pdata->is_BitData()) {
927 BitData* bit_data = (BitData*) pdata;
928 bit_data->set_exception_seen();
929 }
930 }
931 #endif
932
933 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
934 // time throw or a stack unwinding throw and accordingly notify the debugger
935 if (JvmtiExport::can_post_on_exceptions()) {
936 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
937 }
938
939 #ifdef CC_INTERP
940 address continuation = (address)(intptr_t) handler_bci;
941 #else
942 address continuation = NULL;
943 #endif
944 address handler_pc = NULL;
945 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
946 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
947 // handler in this method, or (b) after a stack overflow there is not yet
948 // enough stack space available to reprotect the stack.
949 #ifndef CC_INTERP
950 continuation = Interpreter::remove_activation_entry();
951 #endif
952 #if COMPILER2_OR_JVMCI
953 // Count this for compilation purposes
954 h_method->interpreter_throwout_increment(THREAD);
955 #endif
956 } else {
957 // handler in this method => change bci/bcp to handler bci/bcp and continue there
958 handler_pc = h_method->code_base() + handler_bci;
959 #ifndef CC_INTERP
960 set_bcp_and_mdp(handler_pc, thread);
961 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
962 #endif
963 }
964 // notify debugger of an exception catch
965 // (this is good for exceptions caught in native methods as well)
966 if (JvmtiExport::can_post_on_exceptions()) {
967 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
968 }
969
970 thread->set_vm_result(h_exception());
971 return continuation;
972 IRT_END
973
974
975 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
976 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
977 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
978 IRT_END
979
980
981 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
982 THROW(vmSymbols::java_lang_AbstractMethodError());
983 IRT_END
984
985
986 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
987 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
988 IRT_END
989
990
991 //------------------------------------------------------------------------------------------------------------------------
992 // Fields
993 //
994
995 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
996 Thread* THREAD = thread;
997 // resolve field
998 fieldDescriptor info;
999 LastFrameAccessor last_frame(thread);
1000 constantPoolHandle pool(thread, last_frame.method()->constants());
1001 methodHandle m(thread, last_frame.method());
1002 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
1003 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
1004 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
1005 bool is_value = bytecode == Bytecodes::_withfield;
1006
1007 {
1008 JvmtiHideSingleStepping jhss(thread);
1009 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
1010 m, bytecode, CHECK);
1011 } // end JvmtiHideSingleStepping
1012
1013 // check if link resolution caused cpCache to be updated
1014 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1015 if (cp_cache_entry->is_resolved(bytecode)) return;
1016
1017 // compute auxiliary field attributes
1018 TosState state = as_TosState(info.field_type());
1019
1020 // Resolution of put instructions on final fields is delayed. That is required so that
1021 // exceptions are thrown at the correct place (when the instruction is actually invoked).
1022 // If we do not resolve an instruction in the current pass, leaving the put_code
1023 // set to zero will cause the next put instruction to the same field to reresolve.
1024
1025 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
1026 // to final instance fields with updates originating from a method different than <init>)
1027 // is inhibited. A putfield instruction targeting an instance final field must throw
1028 // an IllegalAccessError if the instruction is not in an instance
1029 // initializer method <init>. If resolution were not inhibited, a putfield
1030 // in an initializer method could be resolved in the initializer. Subsequent
1031 // putfield instructions to the same field would then use cached information.
1032 // As a result, those instructions would not pass through the VM. That is,
1033 // checks in resolve_field_access() would not be executed for those instructions
1034 // and the required IllegalAccessError would not be thrown.
1035 //
1036 // Also, we need to delay resolving getstatic and putstatic instructions until the
1037 // class is initialized. This is required so that access to the static
1038 // field will call the initialization function every time until the class
1039 // is completely initialized ala. in 2.17.5 in JVM Specification.
1040 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
1041 bool uninitialized_static = is_static && !klass->is_initialized();
1042 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
1043 info.has_initialized_final_update();
1044 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
1045
1046 Bytecodes::Code get_code = (Bytecodes::Code)0;
1047 Bytecodes::Code put_code = (Bytecodes::Code)0;
1048 if (!uninitialized_static) {
1049 if (is_static) {
1050 get_code = Bytecodes::_getstatic;
1051 } else {
1052 get_code = Bytecodes::_getfield;
1053 }
1054 if (is_put && is_value) {
1055 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
1056 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
1057 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
1058 }
1059 }
1060
1061 cp_cache_entry->set_field(
1062 get_code,
1063 put_code,
1064 info.field_holder(),
1065 info.index(),
1066 info.offset(),
1067 state,
1068 info.access_flags().is_final(),
1069 info.access_flags().is_volatile(),
1070 info.is_flattened(),
1071 info.is_flattenable(),
1072 pool->pool_holder()
1073 );
1074 }
1075
1076
1077 //------------------------------------------------------------------------------------------------------------------------
1078 // Synchronization
1079 //
1080 // The interpreter's synchronization code is factored out so that it can
1081 // be shared by method invocation and synchronized blocks.
1082 //%note synchronization_3
1083
1084 //%note monitor_1
1085 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
1086 #ifdef ASSERT
1087 thread->last_frame().interpreter_frame_verify_monitor(elem);
1088 #endif
1089 if (PrintBiasedLockingStatistics) {
1090 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
1091 }
1092 Handle h_obj(thread, elem->obj());
1093 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1094 "must be NULL or an object");
1095 if (UseBiasedLocking) {
1096 // Retry fast entry if bias is revoked to avoid unnecessary inflation
1097 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
1098 } else {
1099 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
1100 }
1101 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
1102 "must be NULL or an object");
1103 #ifdef ASSERT
1104 thread->last_frame().interpreter_frame_verify_monitor(elem);
1105 #endif
1106 IRT_END
1107
1108
1109 //%note monitor_1
1110 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
1111 #ifdef ASSERT
1112 thread->last_frame().interpreter_frame_verify_monitor(elem);
1113 #endif
1114 Handle h_obj(thread, elem->obj());
1115 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1116 "must be NULL or an object");
1117 if (elem == NULL || h_obj()->is_unlocked()) {
1118 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1119 }
1120 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
1121 // Free entry. This must be done here, since a pending exception might be installed on
1122 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
1123 elem->set_obj(NULL);
1124 #ifdef ASSERT
1125 thread->last_frame().interpreter_frame_verify_monitor(elem);
1126 #endif
1127 IRT_END
1128
1129
1130 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
1131 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1132 IRT_END
1133
1134
1135 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
1136 // Returns an illegal exception to install into the current thread. The
1137 // pending_exception flag is cleared so normal exception handling does not
1138 // trigger. Any current installed exception will be overwritten. This
1139 // method will be called during an exception unwind.
1140
1141 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1142 Handle exception(thread, thread->vm_result());
1143 assert(exception() != NULL, "vm result should be set");
1144 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1145 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
1146 exception = get_preinitialized_exception(
1147 SystemDictionary::IllegalMonitorStateException_klass(),
1148 CATCH);
1149 }
1150 thread->set_vm_result(exception());
1151 IRT_END
1152
1153
1154 //------------------------------------------------------------------------------------------------------------------------
1155 // Invokes
1156
1157 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
1158 return method->orig_bytecode_at(method->bci_from(bcp));
1159 IRT_END
1160
1161 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
1162 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1163 IRT_END
1164
1165 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
1166 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
1167 IRT_END
1168
1169 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
1170 Thread* THREAD = thread;
1171 LastFrameAccessor last_frame(thread);
1172 // extract receiver from the outgoing argument list if necessary
1173 Handle receiver(thread, NULL);
1174 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1175 bytecode == Bytecodes::_invokespecial) {
1176 ResourceMark rm(thread);
1177 methodHandle m (thread, last_frame.method());
1178 Bytecode_invoke call(m, last_frame.bci());
1179 Symbol* signature = call.signature();
1180 receiver = Handle(thread, last_frame.callee_receiver(signature));
1181
1182 assert(Universe::heap()->is_in_reserved_or_null(receiver())
1183 || VTBuffer::is_in_vt_buffer(receiver()),
1184 "sanity check");
1185 assert(receiver.is_null() ||
1186 !Universe::heap()->is_in_reserved(receiver->klass()),
1187 "sanity check");
1188 }
1189
1190 // resolve method
1191 CallInfo info;
1192 constantPoolHandle pool(thread, last_frame.method()->constants());
1193
1194 {
1195 JvmtiHideSingleStepping jhss(thread);
1196 LinkResolver::resolve_invoke(info, receiver, pool,
1197 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1198 CHECK);
1199 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
1200 int retry_count = 0;
1201 while (info.resolved_method()->is_old()) {
1202 // It is very unlikely that method is redefined more than 100 times
1203 // in the middle of resolve. If it is looping here more than 100 times
1204 // means then there could be a bug here.
1205 guarantee((retry_count++ < 100),
1206 "Could not resolve to latest version of redefined method");
1207 // method is redefined in the middle of resolve so re-try.
1208 LinkResolver::resolve_invoke(info, receiver, pool,
1209 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1210 CHECK);
1211 }
1212 }
1213 } // end JvmtiHideSingleStepping
1214
1215 // check if link resolution caused cpCache to be updated
1216 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1217 if (cp_cache_entry->is_resolved(bytecode)) return;
1218
1219 #ifdef ASSERT
1220 if (bytecode == Bytecodes::_invokeinterface) {
1221 if (info.resolved_method()->method_holder() ==
1222 SystemDictionary::Object_klass()) {
1223 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1224 // (see also CallInfo::set_interface for details)
1225 assert(info.call_kind() == CallInfo::vtable_call ||
1226 info.call_kind() == CallInfo::direct_call, "");
1227 methodHandle rm = info.resolved_method();
1228 assert(rm->is_final() || info.has_vtable_index(),
1229 "should have been set already");
1230 } else if (!info.resolved_method()->has_itable_index()) {
1231 // Resolved something like CharSequence.toString. Use vtable not itable.
1232 assert(info.call_kind() != CallInfo::itable_call, "");
1233 } else {
1234 // Setup itable entry
1235 assert(info.call_kind() == CallInfo::itable_call, "");
1236 int index = info.resolved_method()->itable_index();
1237 assert(info.itable_index() == index, "");
1238 }
1239 } else if (bytecode == Bytecodes::_invokespecial) {
1240 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1241 } else {
1242 assert(info.call_kind() == CallInfo::direct_call ||
1243 info.call_kind() == CallInfo::vtable_call, "");
1244 }
1245 #endif
1246 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
1247 // it is not an interface. The receiver for invokespecial calls within interface
1248 // methods must be checked for every call.
1249 InstanceKlass* sender = pool->pool_holder();
1250 sender = sender->has_host_klass() ? sender->host_klass() : sender;
1251
1252 switch (info.call_kind()) {
1253 case CallInfo::direct_call:
1254 cp_cache_entry->set_direct_call(
1255 bytecode,
1256 info.resolved_method(),
1257 sender->is_interface());
1258 break;
1259 case CallInfo::vtable_call:
1260 cp_cache_entry->set_vtable_call(
1261 bytecode,
1262 info.resolved_method(),
1263 info.vtable_index());
1264 break;
1265 case CallInfo::itable_call:
1266 cp_cache_entry->set_itable_call(
1267 bytecode,
1268 info.resolved_klass(),
1269 info.resolved_method(),
1270 info.itable_index());
1271 break;
1272 default: ShouldNotReachHere();
1273 }
1274 }
1275
1276
1277 // First time execution: Resolve symbols, create a permanent MethodType object.
1278 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1279 Thread* THREAD = thread;
1280 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1281 LastFrameAccessor last_frame(thread);
1282
1283 // resolve method
1284 CallInfo info;
1285 constantPoolHandle pool(thread, last_frame.method()->constants());
1286 {
1287 JvmtiHideSingleStepping jhss(thread);
1288 LinkResolver::resolve_invoke(info, Handle(), pool,
1289 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1290 CHECK);
1291 } // end JvmtiHideSingleStepping
1292
1293 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1294 cp_cache_entry->set_method_handle(pool, info);
1295 }
1296
1297 // First time execution: Resolve symbols, create a permanent CallSite object.
1298 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1299 Thread* THREAD = thread;
1300 LastFrameAccessor last_frame(thread);
1301 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1302
1303 //TO DO: consider passing BCI to Java.
1304 // int caller_bci = last_frame.method()->bci_from(last_frame.bcp());
1305
1306 // resolve method
1307 CallInfo info;
1308 constantPoolHandle pool(thread, last_frame.method()->constants());
1309 int index = last_frame.get_index_u4(bytecode);
1310 {
1311 JvmtiHideSingleStepping jhss(thread);
1312 LinkResolver::resolve_invoke(info, Handle(), pool,
1313 index, bytecode, CHECK);
1314 } // end JvmtiHideSingleStepping
1315
1316 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1317 cp_cache_entry->set_dynamic_call(pool, info);
1318 }
1319
1320 // This function is the interface to the assembly code. It returns the resolved
1321 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1322 // This function will check for redefinition!
1323 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1324 switch (bytecode) {
1325 case Bytecodes::_getstatic:
1326 case Bytecodes::_putstatic:
1327 case Bytecodes::_getfield:
1328 case Bytecodes::_putfield:
1329 case Bytecodes::_withfield:
1330 resolve_get_put(thread, bytecode);
1331 break;
1332 case Bytecodes::_invokevirtual:
1333 case Bytecodes::_invokespecial:
1334 case Bytecodes::_invokestatic:
1335 case Bytecodes::_invokeinterface:
1336 resolve_invoke(thread, bytecode);
1337 break;
1338 case Bytecodes::_invokehandle:
1339 resolve_invokehandle(thread);
1340 break;
1341 case Bytecodes::_invokedynamic:
1342 resolve_invokedynamic(thread);
1343 break;
1344 default:
1345 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1346 break;
1347 }
1348 }
1349 IRT_END
1350
1351 //------------------------------------------------------------------------------------------------------------------------
1352 // Miscellaneous
1353
1354
1355 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1356 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1357 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1358 if (branch_bcp != NULL && nm != NULL) {
1359 // This was a successful request for an OSR nmethod. Because
1360 // frequency_counter_overflow_inner ends with a safepoint check,
1361 // nm could have been unloaded so look it up again. It's unsafe
1362 // to examine nm directly since it might have been freed and used
1363 // for something else.
1364 LastFrameAccessor last_frame(thread);
1365 Method* method = last_frame.method();
1366 int bci = method->bci_from(last_frame.bcp());
1367 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1368 }
1369 if (nm != NULL && thread->is_interp_only_mode()) {
1370 // Normally we never get an nm if is_interp_only_mode() is true, because
1371 // policy()->event has a check for this and won't compile the method when
1372 // true. However, it's possible for is_interp_only_mode() to become true
1373 // during the compilation. We don't want to return the nm in that case
1374 // because we want to continue to execute interpreted.
1375 nm = NULL;
1376 }
1377 #ifndef PRODUCT
1378 if (TraceOnStackReplacement) {
1379 if (nm != NULL) {
1380 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1381 nm->print();
1382 }
1383 }
1384 #endif
1385 return nm;
1386 }
1387
1388 IRT_ENTRY(nmethod*,
1389 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1390 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1391 // flag, in case this method triggers classloading which will call into Java.
1392 UnlockFlagSaver fs(thread);
1393
1394 LastFrameAccessor last_frame(thread);
1395 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1396 methodHandle method(thread, last_frame.method());
1397 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1398 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1399
1400 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1401 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1402 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1403
1404 if (osr_nm != NULL) {
1405 // We may need to do on-stack replacement which requires that no
1406 // monitors in the activation are biased because their
1407 // BasicObjectLocks will need to migrate during OSR. Force
1408 // unbiasing of all monitors in the activation now (even though
1409 // the OSR nmethod might be invalidated) because we don't have a
1410 // safepoint opportunity later once the migration begins.
1411 if (UseBiasedLocking) {
1412 ResourceMark rm;
1413 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1414 for( BasicObjectLock *kptr = last_frame.monitor_end();
1415 kptr < last_frame.monitor_begin();
1416 kptr = last_frame.next_monitor(kptr) ) {
1417 if( kptr->obj() != NULL ) {
1418 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1419 }
1420 }
1421 BiasedLocking::revoke(objects_to_revoke);
1422 }
1423 }
1424 return osr_nm;
1425 IRT_END
1426
1427 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1428 assert(ProfileInterpreter, "must be profiling interpreter");
1429 int bci = method->bci_from(cur_bcp);
1430 MethodData* mdo = method->method_data();
1431 if (mdo == NULL) return 0;
1432 return mdo->bci_to_di(bci);
1433 IRT_END
1434
1435 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1436 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1437 // flag, in case this method triggers classloading which will call into Java.
1438 UnlockFlagSaver fs(thread);
1439
1440 assert(ProfileInterpreter, "must be profiling interpreter");
1441 LastFrameAccessor last_frame(thread);
1442 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1443 methodHandle method(thread, last_frame.method());
1444 Method::build_interpreter_method_data(method, THREAD);
1445 if (HAS_PENDING_EXCEPTION) {
1446 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1447 CLEAR_PENDING_EXCEPTION;
1448 // and fall through...
1449 }
1450 IRT_END
1451
1452
1453 #ifdef ASSERT
1454 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1455 assert(ProfileInterpreter, "must be profiling interpreter");
1456
1457 MethodData* mdo = method->method_data();
1458 assert(mdo != NULL, "must not be null");
1459
1460 int bci = method->bci_from(bcp);
1461
1462 address mdp2 = mdo->bci_to_dp(bci);
1463 if (mdp != mdp2) {
1464 ResourceMark rm;
1465 ResetNoHandleMark rnm; // In a LEAF entry.
1466 HandleMark hm;
1467 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1468 int current_di = mdo->dp_to_di(mdp);
1469 int expected_di = mdo->dp_to_di(mdp2);
1470 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1471 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1472 int approx_bci = -1;
1473 if (current_di >= 0) {
1474 approx_bci = mdo->data_at(current_di)->bci();
1475 }
1476 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1477 mdo->print_on(tty);
1478 method->print_codes();
1479 }
1480 assert(mdp == mdp2, "wrong mdp");
1481 IRT_END
1482 #endif // ASSERT
1483
1484 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1485 assert(ProfileInterpreter, "must be profiling interpreter");
1486 ResourceMark rm(thread);
1487 HandleMark hm(thread);
1488 LastFrameAccessor last_frame(thread);
1489 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1490 MethodData* h_mdo = last_frame.method()->method_data();
1491
1492 // Grab a lock to ensure atomic access to setting the return bci and
1493 // the displacement. This can block and GC, invalidating all naked oops.
1494 MutexLocker ml(RetData_lock);
1495
1496 // ProfileData is essentially a wrapper around a derived oop, so we
1497 // need to take the lock before making any ProfileData structures.
1498 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1499 guarantee(data != NULL, "profile data must be valid");
1500 RetData* rdata = data->as_RetData();
1501 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1502 last_frame.set_mdp(new_mdp);
1503 IRT_END
1504
1505 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1506 MethodCounters* mcs = Method::build_method_counters(m, thread);
1507 if (HAS_PENDING_EXCEPTION) {
1508 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1509 CLEAR_PENDING_EXCEPTION;
1510 }
1511 return mcs;
1512 IRT_END
1513
1514
1515 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1516 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1517 // stack traversal automatically takes care of preserving arguments for invoke, so
1518 // this is no longer needed.
1519
1520 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1521 // if this is called during a safepoint
1522
1523 if (JvmtiExport::should_post_single_step()) {
1524 // We are called during regular safepoints and when the VM is
1525 // single stepping. If any thread is marked for single stepping,
1526 // then we may have JVMTI work to do.
1527 LastFrameAccessor last_frame(thread);
1528 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1529 }
1530 IRT_END
1531
1532 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1533 ConstantPoolCacheEntry *cp_entry))
1534
1535 // check the access_flags for the field in the klass
1536
1537 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1538 int index = cp_entry->field_index();
1539 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1540
1541 bool is_static = (obj == NULL);
1542 HandleMark hm(thread);
1543
1544 Handle h_obj;
1545 if (!is_static) {
1546 // non-static field accessors have an object, but we need a handle
1547 h_obj = Handle(thread, obj);
1548 }
1549 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1550 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1551 LastFrameAccessor last_frame(thread);
1552 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1553 IRT_END
1554
1555 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1556 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1557
1558 Klass* k = cp_entry->f1_as_klass();
1559
1560 // check the access_flags for the field in the klass
1561 InstanceKlass* ik = InstanceKlass::cast(k);
1562 int index = cp_entry->field_index();
1563 // bail out if field modifications are not watched
1564 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1565
1566 char sig_type = '\0';
1567
1568 switch(cp_entry->flag_state()) {
1569 case btos: sig_type = 'B'; break;
1570 case ztos: sig_type = 'Z'; break;
1571 case ctos: sig_type = 'C'; break;
1572 case stos: sig_type = 'S'; break;
1573 case itos: sig_type = 'I'; break;
1574 case ftos: sig_type = 'F'; break;
1575 case atos: sig_type = 'L'; break;
1576 case ltos: sig_type = 'J'; break;
1577 case dtos: sig_type = 'D'; break;
1578 default: ShouldNotReachHere(); return;
1579 }
1580 bool is_static = (obj == NULL);
1581
1582 HandleMark hm(thread);
1583 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1584 jvalue fvalue;
1585 #ifdef _LP64
1586 fvalue = *value;
1587 #else
1588 // Long/double values are stored unaligned and also noncontiguously with
1589 // tagged stacks. We can't just do a simple assignment even in the non-
1590 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1591 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1592 // We assume that the two halves of longs/doubles are stored in interpreter
1593 // stack slots in platform-endian order.
1594 jlong_accessor u;
1595 jint* newval = (jint*)value;
1596 u.words[0] = newval[0];
1597 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1598 fvalue.j = u.long_value;
1599 #endif // _LP64
1600
1601 Handle h_obj;
1602 if (!is_static) {
1603 // non-static field accessors have an object, but we need a handle
1604 h_obj = Handle(thread, obj);
1605 }
1606
1607 LastFrameAccessor last_frame(thread);
1608 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1609 fid, sig_type, &fvalue);
1610 IRT_END
1611
1612 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1613 LastFrameAccessor last_frame(thread);
1614 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1615 IRT_END
1616
1617
1618 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1619 LastFrameAccessor last_frame(thread);
1620 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1621 IRT_END
1622
1623 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1624 {
1625 return (Interpreter::contains(pc) ? 1 : 0);
1626 }
1627 IRT_END
1628
1629
1630 // Implementation of SignatureHandlerLibrary
1631
1632 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1633 // Dummy definition (else normalization method is defined in CPU
1634 // dependant code)
1635 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1636 return fingerprint;
1637 }
1638 #endif
1639
1640 address SignatureHandlerLibrary::set_handler_blob() {
1641 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1642 if (handler_blob == NULL) {
1643 return NULL;
1644 }
1645 address handler = handler_blob->code_begin();
1646 _handler_blob = handler_blob;
1647 _handler = handler;
1648 return handler;
1649 }
1650
1651 void SignatureHandlerLibrary::initialize() {
1652 if (_fingerprints != NULL) {
1653 return;
1654 }
1655 if (set_handler_blob() == NULL) {
1656 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1657 }
1658
1659 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1660 SignatureHandlerLibrary::buffer_size);
1661 _buffer = bb->code_begin();
1662
1663 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1664 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1665 }
1666
1667 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1668 address handler = _handler;
1669 int insts_size = buffer->pure_insts_size();
1670 if (handler + insts_size > _handler_blob->code_end()) {
1671 // get a new handler blob
1672 handler = set_handler_blob();
1673 }
1674 if (handler != NULL) {
1675 memcpy(handler, buffer->insts_begin(), insts_size);
1676 pd_set_handler(handler);
1677 ICache::invalidate_range(handler, insts_size);
1678 _handler = handler + insts_size;
1679 }
1680 return handler;
1681 }
1682
1683 void SignatureHandlerLibrary::add(const methodHandle& method) {
1684 if (method->signature_handler() == NULL) {
1685 // use slow signature handler if we can't do better
1686 int handler_index = -1;
1687 // check if we can use customized (fast) signature handler
1688 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1689 // use customized signature handler
1690 MutexLocker mu(SignatureHandlerLibrary_lock);
1691 // make sure data structure is initialized
1692 initialize();
1693 // lookup method signature's fingerprint
1694 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1695 // allow CPU dependant code to optimize the fingerprints for the fast handler
1696 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1697 handler_index = _fingerprints->find(fingerprint);
1698 // create handler if necessary
1699 if (handler_index < 0) {
1700 ResourceMark rm;
1701 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1702 CodeBuffer buffer((address)(_buffer + align_offset),
1703 SignatureHandlerLibrary::buffer_size - align_offset);
1704 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1705 // copy into code heap
1706 address handler = set_handler(&buffer);
1707 if (handler == NULL) {
1708 // use slow signature handler (without memorizing it in the fingerprints)
1709 } else {
1710 // debugging suppport
1711 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1712 ttyLocker ttyl;
1713 tty->cr();
1714 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1715 _handlers->length(),
1716 (method->is_static() ? "static" : "receiver"),
1717 method->name_and_sig_as_C_string(),
1718 fingerprint,
1719 buffer.insts_size());
1720 if (buffer.insts_size() > 0) {
1721 Disassembler::decode(handler, handler + buffer.insts_size());
1722 }
1723 #ifndef PRODUCT
1724 address rh_begin = Interpreter::result_handler(method()->result_type());
1725 if (CodeCache::contains(rh_begin)) {
1726 // else it might be special platform dependent values
1727 tty->print_cr(" --- associated result handler ---");
1728 address rh_end = rh_begin;
1729 while (*(int*)rh_end != 0) {
1730 rh_end += sizeof(int);
1731 }
1732 Disassembler::decode(rh_begin, rh_end);
1733 } else {
1734 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1735 }
1736 #endif
1737 }
1738 // add handler to library
1739 _fingerprints->append(fingerprint);
1740 _handlers->append(handler);
1741 // set handler index
1742 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1743 handler_index = _fingerprints->length() - 1;
1744 }
1745 }
1746 // Set handler under SignatureHandlerLibrary_lock
1747 if (handler_index < 0) {
1748 // use generic signature handler
1749 method->set_signature_handler(Interpreter::slow_signature_handler());
1750 } else {
1751 // set handler
1752 method->set_signature_handler(_handlers->at(handler_index));
1753 }
1754 } else {
1755 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1756 // use generic signature handler
1757 method->set_signature_handler(Interpreter::slow_signature_handler());
1758 }
1759 }
1760 #ifdef ASSERT
1761 int handler_index = -1;
1762 int fingerprint_index = -2;
1763 {
1764 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1765 // in any way if accessed from multiple threads. To avoid races with another
1766 // thread which may change the arrays in the above, mutex protected block, we
1767 // have to protect this read access here with the same mutex as well!
1768 MutexLocker mu(SignatureHandlerLibrary_lock);
1769 if (_handlers != NULL) {
1770 handler_index = _handlers->find(method->signature_handler());
1771 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1772 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1773 fingerprint_index = _fingerprints->find(fingerprint);
1774 }
1775 }
1776 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1777 handler_index == fingerprint_index, "sanity check");
1778 #endif // ASSERT
1779 }
1780
1781 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1782 int handler_index = -1;
1783 // use customized signature handler
1784 MutexLocker mu(SignatureHandlerLibrary_lock);
1785 // make sure data structure is initialized
1786 initialize();
1787 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1788 handler_index = _fingerprints->find(fingerprint);
1789 // create handler if necessary
1790 if (handler_index < 0) {
1791 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1792 tty->cr();
1793 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1794 _handlers->length(),
1795 p2i(handler),
1796 fingerprint);
1797 }
1798 _fingerprints->append(fingerprint);
1799 _handlers->append(handler);
1800 } else {
1801 if (PrintSignatureHandlers) {
1802 tty->cr();
1803 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1804 _handlers->length(),
1805 fingerprint,
1806 p2i(_handlers->at(handler_index)),
1807 p2i(handler));
1808 }
1809 }
1810 }
1811
1812
1813 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1814 address SignatureHandlerLibrary::_handler = NULL;
1815 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1816 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1817 address SignatureHandlerLibrary::_buffer = NULL;
1818
1819
1820 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1821 methodHandle m(thread, method);
1822 assert(m->is_native(), "sanity check");
1823 // lookup native function entry point if it doesn't exist
1824 bool in_base_library;
1825 if (!m->has_native_function()) {
1826 NativeLookup::lookup(m, in_base_library, CHECK);
1827 }
1828 // make sure signature handler is installed
1829 SignatureHandlerLibrary::add(m);
1830 // The interpreter entry point checks the signature handler first,
1831 // before trying to fetch the native entry point and klass mirror.
1832 // We must set the signature handler last, so that multiple processors
1833 // preparing the same method will be sure to see non-null entry & mirror.
1834 IRT_END
1835
1836 #if defined(IA32) || defined(AMD64) || defined(ARM)
1837 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1838 if (src_address == dest_address) {
1839 return;
1840 }
1841 ResetNoHandleMark rnm; // In a LEAF entry.
1842 HandleMark hm;
1843 ResourceMark rm;
1844 LastFrameAccessor last_frame(thread);
1845 assert(last_frame.is_interpreted_frame(), "");
1846 jint bci = last_frame.bci();
1847 methodHandle mh(thread, last_frame.method());
1848 Bytecode_invoke invoke(mh, bci);
1849 ArgumentSizeComputer asc(invoke.signature());
1850 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1851 Copy::conjoint_jbytes(src_address, dest_address,
1852 size_of_arguments * Interpreter::stackElementSize);
1853 IRT_END
1854 #endif
1855
1856 #if INCLUDE_JVMTI
1857 // This is a support of the JVMTI PopFrame interface.
1858 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1859 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1860 // The member_name argument is a saved reference (in local#0) to the member_name.
1861 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1862 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1863 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1864 Method* method, address bcp))
1865 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1866 if (code != Bytecodes::_invokestatic) {
1867 return;
1868 }
1869 ConstantPool* cpool = method->constants();
1870 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1871 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1872 Symbol* mname = cpool->name_ref_at(cp_index);
1873
1874 if (MethodHandles::has_member_arg(cname, mname)) {
1875 oop member_name_oop = (oop) member_name;
1876 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1877 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1878 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1879 }
1880 thread->set_vm_result(member_name_oop);
1881 } else {
1882 thread->set_vm_result(NULL);
1883 }
1884 IRT_END
1885 #endif // INCLUDE_JVMTI
1886
1887 #ifndef PRODUCT
1888 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1889 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1890 // The generated code still uses call_VM because that will set up the frame pointer for
1891 // bcp and method.
1892 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1893 LastFrameAccessor last_frame(thread);
1894 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1895 methodHandle mh(thread, last_frame.method());
1896 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1897 return preserve_this_value;
1898 IRT_END
1899 #endif // !PRODUCT