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.hpp"
41 #include "memory/vtBuffer.hpp"
42 #include "oops/constantPool.hpp"
43 #include "oops/cpCache.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/methodData.hpp"
46 #include "oops/objArrayKlass.hpp"
47 #include "oops/objArrayOop.inline.hpp"
48 #include "oops/oop.inline.hpp"
49 #include "oops/symbol.hpp"
50 #include "oops/valueKlass.hpp"
51 #include "oops/valueArrayKlass.hpp"
52 #include "oops/valueArrayOop.hpp"
53 #include "oops/valueArrayOop.inline.hpp"
54 #include "prims/jvmtiExport.hpp"
55 #include "prims/nativeLookup.hpp"
56 #include "runtime/atomic.hpp"
57 #include "runtime/biasedLocking.hpp"
58 #include "runtime/compilationPolicy.hpp"
59 #include "runtime/deoptimization.hpp"
60 #include "runtime/fieldDescriptor.hpp"
61 #include "runtime/frame.inline.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/icache.hpp"
64 #include "runtime/interfaceSupport.inline.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/osThread.hpp"
69 #include "runtime/sharedRuntime.hpp"
70 #include "runtime/stubRoutines.hpp"
71 #include "runtime/synchronizer.hpp"
72 #include "runtime/threadCritical.hpp"
73 #include "utilities/align.hpp"
74 #include "utilities/copy.hpp"
75 #include "utilities/events.hpp"
76 #include "utilities/globalDefinitions.hpp"
77 #ifdef COMPILER2
78 #include "opto/runtime.hpp"
79 #endif
80
81 class UnlockFlagSaver {
82 private:
83 JavaThread* _thread;
84 bool _do_not_unlock;
85 public:
86 UnlockFlagSaver(JavaThread* t) {
87 _thread = t;
88 _do_not_unlock = t->do_not_unlock_if_synchronized();
89 t->set_do_not_unlock_if_synchronized(false);
90 }
91 ~UnlockFlagSaver() {
92 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
93 }
94 };
95
96 // Helper class to access current interpreter state
97 class LastFrameAccessor : public StackObj {
98 frame _last_frame;
99 public:
100 LastFrameAccessor(JavaThread* thread) {
101 assert(thread == Thread::current(), "sanity");
102 _last_frame = thread->last_frame();
103 }
104 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
105 Method* method() const { return _last_frame.interpreter_frame_method(); }
106 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
107 int bci() const { return _last_frame.interpreter_frame_bci(); }
108 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
109
110 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
111 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
112
113 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
114 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
115
116 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
117 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
118 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
119 int get_index_u2_cpcache(Bytecodes::Code bc) const
120 { return bytecode().get_index_u2_cpcache(bc); }
121 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
122 int number_of_dimensions() const { return bcp()[3]; }
123 ConstantPoolCacheEntry* cache_entry_at(int i) const
124 { return method()->constants()->cache()->entry_at(i); }
125 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
126
127 oop callee_receiver(Symbol* signature) {
128 return _last_frame.interpreter_callee_receiver(signature);
129 }
130 BasicObjectLock* monitor_begin() const {
131 return _last_frame.interpreter_frame_monitor_begin();
132 }
133 BasicObjectLock* monitor_end() const {
134 return _last_frame.interpreter_frame_monitor_end();
135 }
136 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
137 return _last_frame.next_monitor_in_interpreter_frame(current);
138 }
139
140 frame& get_frame() { return _last_frame; }
141 };
142
143
144 bool InterpreterRuntime::is_breakpoint(JavaThread *thread) {
145 return Bytecodes::code_or_bp_at(LastFrameAccessor(thread).bcp()) == Bytecodes::_breakpoint;
146 }
147
148 //------------------------------------------------------------------------------------------------------------------------
149 // State accessors
150
151 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
152 LastFrameAccessor last_frame(thread);
153 last_frame.set_bcp(bcp);
154 if (ProfileInterpreter) {
155 // ProfileTraps uses MDOs independently of ProfileInterpreter.
156 // That is why we must check both ProfileInterpreter and mdo != NULL.
157 MethodData* mdo = last_frame.method()->method_data();
158 if (mdo != NULL) {
159 NEEDS_CLEANUP;
160 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
161 }
162 }
163 }
164
165 //------------------------------------------------------------------------------------------------------------------------
166 // Constants
167
168
169 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
170 // access constant pool
171 LastFrameAccessor last_frame(thread);
172 ConstantPool* pool = last_frame.method()->constants();
173 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
174 constantTag tag = pool->tag_at(index);
175
176 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
177 Klass* klass = pool->klass_at(index, CHECK);
178 oop java_class = klass->java_mirror();
179 thread->set_vm_result(java_class);
180 IRT_END
181
182 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
183 assert(bytecode == Bytecodes::_ldc ||
184 bytecode == Bytecodes::_ldc_w ||
185 bytecode == Bytecodes::_ldc2_w ||
186 bytecode == Bytecodes::_fast_aldc ||
187 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
188 ResourceMark rm(thread);
189 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
190 bytecode == Bytecodes::_fast_aldc_w);
191 LastFrameAccessor last_frame(thread);
192 methodHandle m (thread, last_frame.method());
193 Bytecode_loadconstant ldc(m, last_frame.bci());
194
195 // Double-check the size. (Condy can have any type.)
196 BasicType type = ldc.result_type();
197 switch (type2size[type]) {
198 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
199 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
200 default: ShouldNotReachHere();
201 }
202
203 // Resolve the constant. This does not do unboxing.
204 // But it does replace Universe::the_null_sentinel by null.
205 oop result = ldc.resolve_constant(CHECK);
206 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
207
208 #ifdef ASSERT
209 {
210 // The bytecode wrappers aren't GC-safe so construct a new one
211 Bytecode_loadconstant ldc2(m, last_frame.bci());
212 int rindex = ldc2.cache_index();
213 if (rindex < 0)
214 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
215 if (rindex >= 0) {
216 oop coop = m->constants()->resolved_references()->obj_at(rindex);
217 oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
218 assert(oopDesc::equals(roop, coop), "expected result for assembly code");
219 }
220 }
221 #endif
222 thread->set_vm_result(result);
223 if (!is_fast_aldc) {
224 // Tell the interpreter how to unbox the primitive.
225 guarantee(java_lang_boxing_object::is_instance(result, type), "");
226 int offset = java_lang_boxing_object::value_offset_in_bytes(type);
227 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
228 | (offset & ConstantPoolCacheEntry::field_index_mask));
229 thread->set_vm_result_2((Metadata*)flags);
230 }
231 }
232 IRT_END
233
234
235 //------------------------------------------------------------------------------------------------------------------------
236 // Allocation
237
238 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
239 Klass* k = pool->klass_at(index, CHECK);
240 InstanceKlass* klass = InstanceKlass::cast(k);
241
242 // Make sure we are not instantiating an abstract klass
243 klass->check_valid_for_instantiation(true, CHECK);
244
245 // Make sure klass is initialized
246 klass->initialize(CHECK);
247
248 // At this point the class may not be fully initialized
249 // because of recursive initialization. If it is fully
250 // initialized & has_finalized is not set, we rewrite
251 // it into its fast version (Note: no locking is needed
252 // here since this is an atomic byte write and can be
253 // done more than once).
254 //
255 // Note: In case of classes with has_finalized we don't
256 // rewrite since that saves us an extra check in
257 // the fast version which then would call the
258 // slow version anyway (and do a call back into
259 // Java).
260 // If we have a breakpoint, then we don't rewrite
261 // because the _breakpoint bytecode would be lost.
262 oop obj = klass->allocate_instance(CHECK);
263 thread->set_vm_result(obj);
264 IRT_END
265
266 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) {
267 switch (type) {
268 case T_BOOLEAN:
269 instance()->bool_field_put(offset, (jboolean)*((int*)addr));
270 break;
271 case T_CHAR:
272 instance()->char_field_put(offset, (jchar) *((int*)addr));
273 break;
274 case T_FLOAT:
275 instance()->float_field_put(offset, (jfloat)*((float*)addr));
276 break;
277 case T_DOUBLE:
278 instance()->double_field_put(offset, (jdouble)*((double*)addr));
279 break;
280 case T_BYTE:
281 instance()->byte_field_put(offset, (jbyte)*((int*)addr));
282 break;
283 case T_SHORT:
284 instance()->short_field_put(offset, (jshort)*((int*)addr));
285 break;
286 case T_INT:
287 instance()->int_field_put(offset, (jint)*((int*)addr));
288 break;
289 case T_LONG:
290 instance()->long_field_put(offset, (jlong)*((long long*)addr));
291 break;
292 case T_OBJECT:
293 case T_ARRAY:
294 fatal("Should not be handled with this method");
295 break;
296 default:
297 fatal("Unsupported BasicType");
298 }
299 }
300
301 IRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* thread, ConstantPool* pool, int index))
302 // Getting the ValueKlass
303 Klass* k = pool->klass_at(index, CHECK);
304 assert(k->is_value(), "defaultvalue argument must be the value type class");
305 ValueKlass* vklass = ValueKlass::cast(k);
306
307 vklass->initialize(THREAD);
308 oop res = vklass->default_value();
309 thread->set_vm_result(res);
310 IRT_END
311
312 IRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* thread, ConstantPoolCache* cp_cache))
313 LastFrameAccessor last_frame(thread);
314 // Getting the ValueKlass
315 int index = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_withfield));
316 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
317 assert(cp_entry->is_resolved(Bytecodes::_withfield), "Should have been resolved");
318 Klass* klass = cp_entry->f1_as_klass();
319 assert(klass->is_value(), "withfield only applies to value types");
320 ValueKlass* vklass = ValueKlass::cast(klass);
321
322 // Getting Field information
323 int offset = cp_entry->f2_as_index();
324 int field_index = cp_entry->field_index();
325 int field_offset = cp_entry->f2_as_offset();
326 Symbol* field_signature = vklass->field_signature(field_index);
327 ResourceMark rm(THREAD);
328 const char* signature = (const char *) field_signature->as_utf8();
329 BasicType field_type = char2type(signature[0]);
330
331 // Getting old value
332 frame& f = last_frame.get_frame();
333 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1;
334 int vt_offset = type2size[field_type];
335 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset);
336 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver");
337 Handle old_value_h(THREAD, old_value);
338
339 // Creating new value by copying the one passed in argument
340 bool in_heap;
341 instanceOop new_value = vklass->allocate_buffered_or_heap_instance(&in_heap,
342 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
343 Handle new_value_h = Handle(THREAD, new_value);
344 int first_offset = vklass->first_field_offset();
345 vklass->value_store(vklass->data_for_oop(old_value_h()),
346 vklass->data_for_oop(new_value_h()), in_heap, false);
347
348 // Updating the field specified in arguments
349 if (field_type == T_ARRAY) {
350 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
351 assert(aoop == NULL || oopDesc::is_oop(aoop),"argument must be a reference type");
352 if (in_heap) {
353 new_value_h()->obj_field_put(field_offset, aoop);
354 } else {
355 new_value_h()->obj_field_put_raw(field_offset, aoop);
356 }
357 } else if (field_type == T_OBJECT) {
358 // Logic below is optimized
359 // Null checks for non flattenable fields have already be performed in the assembly template
360 // of the interpreter, which reduces the number of possible cases:
361 // 1 - flattened or not flattened
362 // 2 - if not flattened: argument is buffered (value) or in heap (value and objects)
363 if (cp_entry->is_flattened()) {
364 Klass* field_k = vklass->get_value_field_klass(field_index);
365 ValueKlass* field_vk = ValueKlass::cast(field_k);
366 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
367 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type");
368 assert(field_vk == vt_oop->klass(), "Must match");
369 field_vk->value_store(field_vk->data_for_oop(vt_oop),
370 ((char*)(oopDesc*)new_value_h()) + field_offset, in_heap, false);
371 } else { // not flattened
372 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
373 assert(voop != NULL || !cp_entry->is_flattenable(),
374 "NULL checks for non flattenable fields must have been performed in interpreter assembly template");
375 assert(voop == NULL || oopDesc::is_oop(voop),"checking argument");
376 if (VTBuffer::is_in_vt_buffer(voop)) {
377 // new value field is currently allocated in a TLVB, a heap allocated
378 // copy must be created because a field must never point to a TLVB allocated value
379 Handle voop_h = Handle(THREAD, voop);
380 ValueKlass* field_vk = ValueKlass::cast(voop->klass());
381 assert(!cp_entry->is_flattenable() || field_vk == vklass->get_value_field_klass(field_index), "Sanity check");
382 instanceOop field_copy = field_vk->allocate_instance(CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
383 Handle field_copy_h = Handle(THREAD, field_copy);
384 field_vk->value_store(field_vk->data_for_oop(voop_h()), field_vk->data_for_oop(field_copy_h()), true, false);
385 if (in_heap) {
386 new_value_h()->obj_field_put(field_offset, field_copy_h());
387 } else {
388 new_value_h()->obj_field_put_raw(field_offset, field_copy_h());
389 }
390 } else { // not buffered
391 if (in_heap) {
392 new_value_h()->obj_field_put(field_offset, voop);
393 } else {
394 new_value_h()->obj_field_put_raw(field_offset, voop);
395 }
396 }
397 }
398 } else { // not T_OBJECT nor T_ARRAY
399 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx);
400 copy_primitive_argument(addr, new_value_h, field_offset, field_type);
401 }
402
403 // returning result
404 thread->set_vm_result(new_value_h());
405 return (type2size[field_type] + type2size[T_OBJECT]) * AbstractInterpreter::stackElementSize;
406 IRT_END
407
408 IRT_ENTRY(void, InterpreterRuntime::uninitialized_static_value_field(JavaThread* thread, oopDesc* mirror, int index))
409 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
410 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
411 int offset = klass->field_offset(index);
412 Klass* field_k = klass->get_value_field_klass_or_null(index);
413 assert(field_k != NULL, "Must have been initialized");
414 ValueKlass* field_vklass = ValueKlass::cast(field_k);
415 instanceOop res = (instanceOop)field_vklass->default_value();
416 thread->set_vm_result(res);
417 IRT_END
418
419 IRT_ENTRY(void, InterpreterRuntime::uninitialized_instance_value_field(JavaThread* thread, oopDesc* obj, int index))
420 instanceHandle obj_h(THREAD, (instanceOop)obj);
421 InstanceKlass* klass = InstanceKlass::cast(obj_h()->klass());
422 Klass* field_k = klass->get_value_field_klass_or_null(index);
423 assert(field_k != NULL, "Must have been initialized");
424 ValueKlass* field_vklass = ValueKlass::cast(field_k);
425 assert(field_vklass->is_initialized(), "Must have been initialized at this point");
426 instanceOop res = (instanceOop)field_vklass->default_value();
427 thread->set_vm_result(res);
428 IRT_END
429
430 IRT_ENTRY(void, InterpreterRuntime::write_heap_copy(JavaThread* thread, oopDesc* value, int offset, oopDesc* rcv))
431 assert(oopDesc::is_oop(value), "Sanity check");
432 assert(oopDesc::is_oop(rcv) ,"Sanity check");
433 assert(value->is_value(), "Sanity check");
434 assert(rcv->is_instance(), "Sanity check");
435 assert(VTBuffer::is_in_vt_buffer(value), "Should only be called for buffered values");
436
437 ValueKlass* vk = ValueKlass::cast(value->klass());
438 Handle val_h(THREAD, value);
439 Handle rcv_h(THREAD, rcv);
440 instanceOop res = vk->allocate_instance(CHECK);
441 // copy value
442 vk->value_store(vk->data_for_oop(val_h()),
443 vk->data_for_oop(res), true, false);
444 ((instanceOop)rcv_h())->obj_field_put(offset, res);
445 IRT_END
446
447 IRT_ENTRY(void, InterpreterRuntime::write_flattened_value(JavaThread* thread, oopDesc* value, int offset, oopDesc* rcv))
448 assert(oopDesc::is_oop(value), "Sanity check");
449 assert(oopDesc::is_oop(rcv), "Sanity check");
450 assert(value->is_value(), "Sanity check");
451
452 ValueKlass* vklass = ValueKlass::cast(value->klass());
453 vklass->value_store(vklass->data_for_oop(value), ((char*)(oopDesc*)rcv) + offset, true, true);
454 IRT_END
455
456 IRT_ENTRY(void, InterpreterRuntime::read_flattened_field(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder))
457 Handle obj_h(THREAD, obj);
458
459 assert(oopDesc::is_oop(obj), "Sanity check");
460
461 assert(field_holder->is_instance_klass(), "Sanity check");
462 InstanceKlass* klass = InstanceKlass::cast(field_holder);
463
464 assert(klass->field_is_flattened(index), "Sanity check");
465
466 ValueKlass* field_vklass = ValueKlass::cast(klass->get_value_field_klass(index));
467 assert(field_vklass->is_initialized(), "Must be initialized at this point");
468
469 bool in_heap;
470 // allocate instance
471 instanceOop res = field_vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
472 // copy value
473 field_vklass->value_store(((char*)(oopDesc*)obj_h()) + klass->field_offset(index),
474 field_vklass->data_for_oop(res), in_heap, true);
475 thread->set_vm_result(res);
476 IRT_END
477
478 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
479 oop obj = oopFactory::new_typeArray(type, size, CHECK);
480 thread->set_vm_result(obj);
481 IRT_END
482
483
484 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
485 Klass* klass = pool->klass_at(index, CHECK);
486 if (klass->is_value()) { // Logically creates elements, ensure klass init
487 klass->initialize(CHECK);
488 }
489 arrayOop obj = oopFactory::new_array(klass, size, CHECK);
490 thread->set_vm_result(obj);
491 IRT_END
492
493 IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
494 Klass* klass = array->klass();
495 assert(klass->is_valueArray_klass(), "expected value array oop");
496
497 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
498 ValueKlass* vklass = vaklass->element_klass();
499 arrayHandle ah(THREAD, array);
500 bool in_heap;
501 instanceOop value_holder = vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
502 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper());
503 vklass->value_store(src, vklass->data_for_oop(value_holder),
504 vaklass->element_byte_size(), in_heap, false);
505 thread->set_vm_result(value_holder);
506 IRT_END
507
508 IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, void* val, arrayOopDesc* array, int index))
509 assert(val != NULL, "can't store null into flat array");
510 Klass* klass = array->klass();
511 assert(klass->is_valueArray_klass(), "expected value array");
512 assert(ArrayKlass::cast(klass)->element_klass() == ((oop)val)->klass(), "Store type incorrect");
513
514 valueArrayOop varray = (valueArrayOop)array;
515 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
516 ValueKlass* vklass = vaklass->element_klass();
517 const int lh = vaklass->layout_helper();
518 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
519 vaklass->element_byte_size(), true, false);
520 IRT_END
521
522 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
523 // We may want to pass in more arguments - could make this slightly faster
524 LastFrameAccessor last_frame(thread);
525 ConstantPool* constants = last_frame.method()->constants();
526 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
527 Klass* klass = constants->klass_at(i, CHECK);
528 int nof_dims = last_frame.number_of_dimensions();
529 assert(klass->is_klass(), "not a class");
530 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
531
532 if (klass->is_value()) { // Logically creates elements, ensure klass init
533 klass->initialize(CHECK);
534 }
535
536 // We must create an array of jints to pass to multi_allocate.
537 ResourceMark rm(thread);
538 const int small_dims = 10;
539 jint dim_array[small_dims];
540 jint *dims = &dim_array[0];
541 if (nof_dims > small_dims) {
542 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
543 }
544 for (int index = 0; index < nof_dims; index++) {
545 // offset from first_size_address is addressed as local[index]
546 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
547 dims[index] = first_size_address[n];
548 }
549 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
550 thread->set_vm_result(obj);
551 IRT_END
552
553 IRT_ENTRY(void, InterpreterRuntime::value_heap_copy(JavaThread* thread, oopDesc* value))
554 assert(VTBuffer::is_in_vt_buffer(value), "Must only be called for buffered values");
555 ValueKlass* vk = ValueKlass::cast(value->klass());
556 Handle val_h(THREAD, value);
557 instanceOop obj = vk->allocate_instance(CHECK);
558 Handle obj_h(THREAD, obj);
559 vk->value_store(vk->data_for_oop(val_h()), vk->data_for_oop(obj_h()), true, false);
560 thread->set_vm_result(obj_h());
561 IRT_END
562
563 IRT_LEAF(void, InterpreterRuntime::recycle_vtbuffer(void* alloc_ptr))
564 JavaThread* thread = (JavaThread*)Thread::current();
565 VTBuffer::recycle_vtbuffer(thread, alloc_ptr);
566 IRT_END
567
568 IRT_ENTRY(void, InterpreterRuntime::recycle_buffered_values(JavaThread* thread))
569 frame f = thread->last_frame();
570 assert(f.is_interpreted_frame(), "recycling can only be triggered from interpreted frames");
571 VTBuffer::recycle_vt_in_frame(thread, &f);
572 IRT_END
573
574 IRT_ENTRY(void, InterpreterRuntime::fix_frame_vt_alloc_ptr(JavaThread* thread))
575 frame f = thread->last_frame();
576 VTBuffer::fix_frame_vt_alloc_ptr(f, VTBufferChunk::chunk(thread->vt_alloc_ptr()));
577 IRT_END
578
579 IRT_ENTRY(void, InterpreterRuntime::return_value(JavaThread* thread, oopDesc* obj))
580 assert(VTBuffer::is_in_vt_buffer(obj), "Must only be called for buffered values");
581 assert(obj->klass()->is_value(), "Sanity check");
582 ValueKlass* vk = ValueKlass::cast(obj->klass());
583 RegisterMap reg_map(thread, false);
584 frame current_frame = thread->last_frame();
585 frame caller_frame = current_frame.sender(®_map);
586 if (!caller_frame.is_interpreted_frame()) {
587 // caller is not an interpreted frame, creating a new value in Java heap
588 Handle obj_h(THREAD, obj);
589 instanceOop res = vk->allocate_instance(CHECK);
590 Handle res_h(THREAD, res);
591 // copy value
592 vk->value_store(vk->data_for_oop(obj_h()),
593 vk->data_for_oop(res_h()), true, false);
594 thread->set_vm_result(res_h());
595 return;
596 } else {
597 // A buffered value is being returned to an interpreted frame,
598 // but the work has to be delayed to remove_activation() because
599 // the frame cannot be modified now (GC can run at the safepoint
600 // when exiting runtime, and frame layout must be kept consistent
601 // with the OopMap).
602 thread->set_return_buffered_value(obj);
603 thread->set_vm_result(obj);
604 }
605 IRT_END
606
607 IRT_LEAF(void, InterpreterRuntime::return_value_step2(oopDesc* obj, void* alloc_ptr))
608
609 JavaThread* thread = (JavaThread*)Thread::current();
610 assert(obj == thread->return_buffered_value(), "Consistency check");
611 assert(!Universe::heap()->is_in_reserved(obj), "Should only apply to buffered values");
612
613 oop dest = VTBuffer::relocate_return_value(thread, alloc_ptr, obj);
614 thread->set_return_buffered_value(NULL);
615 thread->set_vm_result(dest);
616 IRT_END
617
618 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
619 assert(oopDesc::is_oop(obj), "must be a valid oop");
620 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
621 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
622 IRT_END
623
624
625 // Quicken instance-of and check-cast bytecodes
626 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
627 // Force resolving; quicken the bytecode
628 LastFrameAccessor last_frame(thread);
629 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
630 ConstantPool* cpool = last_frame.method()->constants();
631 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
632 // program we might have seen an unquick'd bytecode in the interpreter but have another
633 // thread quicken the bytecode before we get here.
634 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
635 Klass* klass = cpool->klass_at(which, CHECK);
636 thread->set_vm_result_2(klass);
637 IRT_END
638
639
640 //------------------------------------------------------------------------------------------------------------------------
641 // Exceptions
642
643 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
644 const methodHandle& trap_method, int trap_bci, TRAPS) {
645 if (trap_method.not_null()) {
646 MethodData* trap_mdo = trap_method->method_data();
647 if (trap_mdo == NULL) {
648 Method::build_interpreter_method_data(trap_method, THREAD);
649 if (HAS_PENDING_EXCEPTION) {
650 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
651 "we expect only an OOM error here");
652 CLEAR_PENDING_EXCEPTION;
653 }
654 trap_mdo = trap_method->method_data();
655 // and fall through...
656 }
657 if (trap_mdo != NULL) {
658 // Update per-method count of trap events. The interpreter
659 // is updating the MDO to simulate the effect of compiler traps.
660 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
661 }
662 }
663 }
664
665 // Assume the compiler is (or will be) interested in this event.
666 // If necessary, create an MDO to hold the information, and record it.
667 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
668 assert(ProfileTraps, "call me only if profiling");
669 LastFrameAccessor last_frame(thread);
670 methodHandle trap_method(thread, last_frame.method());
671 int trap_bci = trap_method->bci_from(last_frame.bcp());
672 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
673 }
674
675 #ifdef CC_INTERP
676 // As legacy note_trap, but we have more arguments.
677 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
678 methodHandle trap_method(method);
679 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
680 IRT_END
681
682 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
683 // for each exception.
684 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
685 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
686 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
687 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
688 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
689 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
690 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
691 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
692 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
693 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
694 #endif // CC_INTERP
695
696
697 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
698 // get klass
699 InstanceKlass* klass = InstanceKlass::cast(k);
700 assert(klass->is_initialized(),
701 "this klass should have been initialized during VM initialization");
702 // create instance - do not call constructor since we may have no
703 // (java) stack space left (should assert constructor is empty)
704 Handle exception;
705 oop exception_oop = klass->allocate_instance(CHECK_(exception));
706 exception = Handle(THREAD, exception_oop);
707 if (StackTraceInThrowable) {
708 java_lang_Throwable::fill_in_stack_trace(exception);
709 }
710 return exception;
711 }
712
713 // Special handling for stack overflow: since we don't have any (java) stack
714 // space left we use the pre-allocated & pre-initialized StackOverflowError
715 // klass to create an stack overflow error instance. We do not call its
716 // constructor for the same reason (it is empty, anyway).
717 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
718 Handle exception = get_preinitialized_exception(
719 SystemDictionary::StackOverflowError_klass(),
720 CHECK);
721 // Increment counter for hs_err file reporting
722 Atomic::inc(&Exceptions::_stack_overflow_errors);
723 THROW_HANDLE(exception);
724 IRT_END
725
726 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
727 Handle exception = get_preinitialized_exception(
728 SystemDictionary::StackOverflowError_klass(),
729 CHECK);
730 java_lang_Throwable::set_message(exception(),
731 Universe::delayed_stack_overflow_error_message());
732 // Increment counter for hs_err file reporting
733 Atomic::inc(&Exceptions::_stack_overflow_errors);
734 THROW_HANDLE(exception);
735 IRT_END
736
737 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
738 // lookup exception klass
739 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
740 if (ProfileTraps) {
741 if (s == vmSymbols::java_lang_ArithmeticException()) {
742 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
743 } else if (s == vmSymbols::java_lang_NullPointerException()) {
744 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
745 }
746 }
747 // create exception
748 Handle exception = Exceptions::new_exception(thread, s, message);
749 thread->set_vm_result(exception());
750 IRT_END
751
752
753 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
754 ResourceMark rm(thread);
755 const char* klass_name = obj->klass()->external_name();
756 // lookup exception klass
757 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
758 if (ProfileTraps) {
759 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
760 }
761 // create exception, with klass name as detail message
762 Handle exception = Exceptions::new_exception(thread, s, klass_name);
763 thread->set_vm_result(exception());
764 IRT_END
765
766 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, arrayOopDesc* a, jint index))
767 if (ProfileTraps) {
768 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
769 }
770
771 ResourceMark rm(thread);
772 stringStream ss;
773 ss.print("Index %d out of bounds for length %d", index, a->length());
774
775 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
776 IRT_END
777
778 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
779 JavaThread* thread, oopDesc* obj))
780
781 ResourceMark rm(thread);
782 char* message = SharedRuntime::generate_class_cast_message(
783 thread, obj->klass());
784
785 if (ProfileTraps) {
786 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
787 }
788
789 // create exception
790 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
791 IRT_END
792
793 // exception_handler_for_exception(...) returns the continuation address,
794 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
795 // The exception oop is returned to make sure it is preserved over GC (it
796 // is only on the stack if the exception was thrown explicitly via athrow).
797 // During this operation, the expression stack contains the values for the
798 // bci where the exception happened. If the exception was propagated back
799 // from a call, the expression stack contains the values for the bci at the
800 // invoke w/o arguments (i.e., as if one were inside the call).
801 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
802
803 LastFrameAccessor last_frame(thread);
804 Handle h_exception(thread, exception);
805 methodHandle h_method (thread, last_frame.method());
806 constantPoolHandle h_constants(thread, h_method->constants());
807 bool should_repeat;
808 int handler_bci;
809 int current_bci = last_frame.bci();
810
811 if (thread->frames_to_pop_failed_realloc() > 0) {
812 // Allocation of scalar replaced object used in this frame
813 // failed. Unconditionally pop the frame.
814 thread->dec_frames_to_pop_failed_realloc();
815 thread->set_vm_result(h_exception());
816 // If the method is synchronized we already unlocked the monitor
817 // during deoptimization so the interpreter needs to skip it when
818 // the frame is popped.
819 thread->set_do_not_unlock_if_synchronized(true);
820 #ifdef CC_INTERP
821 return (address) -1;
822 #else
823 return Interpreter::remove_activation_entry();
824 #endif
825 }
826
827 // Need to do this check first since when _do_not_unlock_if_synchronized
828 // is set, we don't want to trigger any classloading which may make calls
829 // into java, or surprisingly find a matching exception handler for bci 0
830 // since at this moment the method hasn't been "officially" entered yet.
831 if (thread->do_not_unlock_if_synchronized()) {
832 ResourceMark rm;
833 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
834 thread->set_vm_result(exception);
835 #ifdef CC_INTERP
836 return (address) -1;
837 #else
838 return Interpreter::remove_activation_entry();
839 #endif
840 }
841
842 do {
843 should_repeat = false;
844
845 // assertions
846 #ifdef ASSERT
847 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
848 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
849 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
850 if (ExitVMOnVerifyError) vm_exit(-1);
851 ShouldNotReachHere();
852 }
853 #endif
854
855 // tracing
856 if (log_is_enabled(Info, exceptions)) {
857 ResourceMark rm(thread);
858 stringStream tempst;
859 tempst.print("interpreter method <%s>\n"
860 " at bci %d for thread " INTPTR_FORMAT " (%s)",
861 h_method->print_value_string(), current_bci, p2i(thread), thread->name());
862 Exceptions::log_exception(h_exception, tempst);
863 }
864 // Don't go paging in something which won't be used.
865 // else if (extable->length() == 0) {
866 // // disabled for now - interpreter is not using shortcut yet
867 // // (shortcut is not to call runtime if we have no exception handlers)
868 // // warning("performance bug: should not call runtime if method has no exception handlers");
869 // }
870 // for AbortVMOnException flag
871 Exceptions::debug_check_abort(h_exception);
872
873 // exception handler lookup
874 Klass* klass = h_exception->klass();
875 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
876 if (HAS_PENDING_EXCEPTION) {
877 // We threw an exception while trying to find the exception handler.
878 // Transfer the new exception to the exception handle which will
879 // be set into thread local storage, and do another lookup for an
880 // exception handler for this exception, this time starting at the
881 // BCI of the exception handler which caused the exception to be
882 // thrown (bug 4307310).
883 h_exception = Handle(THREAD, PENDING_EXCEPTION);
884 CLEAR_PENDING_EXCEPTION;
885 if (handler_bci >= 0) {
886 current_bci = handler_bci;
887 should_repeat = true;
888 }
889 }
890 } while (should_repeat == true);
891
892 #if INCLUDE_JVMCI
893 if (EnableJVMCI && h_method->method_data() != NULL) {
894 ResourceMark rm(thread);
895 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
896 if (pdata != NULL && pdata->is_BitData()) {
897 BitData* bit_data = (BitData*) pdata;
898 bit_data->set_exception_seen();
899 }
900 }
901 #endif
902
903 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
904 // time throw or a stack unwinding throw and accordingly notify the debugger
905 if (JvmtiExport::can_post_on_exceptions()) {
906 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
907 }
908
909 #ifdef CC_INTERP
910 address continuation = (address)(intptr_t) handler_bci;
911 #else
912 address continuation = NULL;
913 #endif
914 address handler_pc = NULL;
915 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
916 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
917 // handler in this method, or (b) after a stack overflow there is not yet
918 // enough stack space available to reprotect the stack.
919 #ifndef CC_INTERP
920 continuation = Interpreter::remove_activation_entry();
921 #endif
922 #if COMPILER2_OR_JVMCI
923 // Count this for compilation purposes
924 h_method->interpreter_throwout_increment(THREAD);
925 #endif
926 } else {
927 // handler in this method => change bci/bcp to handler bci/bcp and continue there
928 handler_pc = h_method->code_base() + handler_bci;
929 #ifndef CC_INTERP
930 set_bcp_and_mdp(handler_pc, thread);
931 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
932 #endif
933 }
934 // notify debugger of an exception catch
935 // (this is good for exceptions caught in native methods as well)
936 if (JvmtiExport::can_post_on_exceptions()) {
937 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
938 }
939
940 thread->set_vm_result(h_exception());
941 return continuation;
942 IRT_END
943
944
945 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
946 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
947 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
948 IRT_END
949
950
951 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
952 THROW(vmSymbols::java_lang_AbstractMethodError());
953 IRT_END
954
955 // This method is called from the "abstract_entry" of the interpreter.
956 // At that point, the arguments have already been removed from the stack
957 // and therefore we don't have the receiver object at our fingertips. (Though,
958 // on some platforms the receiver still resides in a register...). Thus,
959 // we have no choice but print an error message not containing the receiver
960 // type.
961 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* thread,
962 Method* missingMethod))
963 ResourceMark rm(thread);
964 assert(missingMethod != NULL, "sanity");
965 methodHandle m(thread, missingMethod);
966 LinkResolver::throw_abstract_method_error(m, THREAD);
967 IRT_END
968
969 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* thread,
970 Klass* recvKlass,
971 Method* missingMethod))
972 ResourceMark rm(thread);
973 methodHandle mh = methodHandle(thread, missingMethod);
974 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
975 IRT_END
976
977
978 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
979 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
980 IRT_END
981
982 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* thread,
983 Klass* recvKlass,
984 Klass* interfaceKlass))
985 ResourceMark rm(thread);
986 char buf[1000];
987 buf[0] = '\0';
988 jio_snprintf(buf, sizeof(buf),
989 "Class %s does not implement the requested interface %s",
990 recvKlass ? recvKlass->external_name() : "NULL",
991 interfaceKlass ? interfaceKlass->external_name() : "NULL");
992 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
993 IRT_END
994
995 //------------------------------------------------------------------------------------------------------------------------
996 // Fields
997 //
998
999 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
1000 Thread* THREAD = thread;
1001 // resolve field
1002 fieldDescriptor info;
1003 LastFrameAccessor last_frame(thread);
1004 constantPoolHandle pool(thread, last_frame.method()->constants());
1005 methodHandle m(thread, last_frame.method());
1006 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
1007 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
1008 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
1009 bool is_value = bytecode == Bytecodes::_withfield;
1010
1011 {
1012 JvmtiHideSingleStepping jhss(thread);
1013 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
1014 m, bytecode, CHECK);
1015 } // end JvmtiHideSingleStepping
1016
1017 // check if link resolution caused cpCache to be updated
1018 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1019 if (cp_cache_entry->is_resolved(bytecode)) return;
1020
1021 // compute auxiliary field attributes
1022 TosState state = as_TosState(info.field_type());
1023
1024 // Resolution of put instructions on final fields is delayed. That is required so that
1025 // exceptions are thrown at the correct place (when the instruction is actually invoked).
1026 // If we do not resolve an instruction in the current pass, leaving the put_code
1027 // set to zero will cause the next put instruction to the same field to reresolve.
1028
1029 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
1030 // to final instance fields with updates originating from a method different than <init>)
1031 // is inhibited. A putfield instruction targeting an instance final field must throw
1032 // an IllegalAccessError if the instruction is not in an instance
1033 // initializer method <init>. If resolution were not inhibited, a putfield
1034 // in an initializer method could be resolved in the initializer. Subsequent
1035 // putfield instructions to the same field would then use cached information.
1036 // As a result, those instructions would not pass through the VM. That is,
1037 // checks in resolve_field_access() would not be executed for those instructions
1038 // and the required IllegalAccessError would not be thrown.
1039 //
1040 // Also, we need to delay resolving getstatic and putstatic instructions until the
1041 // class is initialized. This is required so that access to the static
1042 // field will call the initialization function every time until the class
1043 // is completely initialized ala. in 2.17.5 in JVM Specification.
1044 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
1045 bool uninitialized_static = is_static && !klass->is_initialized();
1046 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
1047 info.has_initialized_final_update();
1048 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
1049
1050 Bytecodes::Code get_code = (Bytecodes::Code)0;
1051 Bytecodes::Code put_code = (Bytecodes::Code)0;
1052 if (!uninitialized_static) {
1053 if (is_static) {
1054 get_code = Bytecodes::_getstatic;
1055 } else {
1056 get_code = Bytecodes::_getfield;
1057 }
1058 if (is_put && is_value) {
1059 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
1060 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
1061 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
1062 }
1063 }
1064
1065 cp_cache_entry->set_field(
1066 get_code,
1067 put_code,
1068 info.field_holder(),
1069 info.index(),
1070 info.offset(),
1071 state,
1072 info.access_flags().is_final(),
1073 info.access_flags().is_volatile(),
1074 info.is_flattened(),
1075 info.is_flattenable(),
1076 pool->pool_holder()
1077 );
1078 }
1079
1080
1081 //------------------------------------------------------------------------------------------------------------------------
1082 // Synchronization
1083 //
1084 // The interpreter's synchronization code is factored out so that it can
1085 // be shared by method invocation and synchronized blocks.
1086 //%note synchronization_3
1087
1088 //%note monitor_1
1089 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
1090 #ifdef ASSERT
1091 thread->last_frame().interpreter_frame_verify_monitor(elem);
1092 #endif
1093 if (PrintBiasedLockingStatistics) {
1094 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
1095 }
1096 Handle h_obj(thread, elem->obj());
1097 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1098 "must be NULL or an object");
1099 if (UseBiasedLocking) {
1100 // Retry fast entry if bias is revoked to avoid unnecessary inflation
1101 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
1102 } else {
1103 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
1104 }
1105 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
1106 "must be NULL or an object");
1107 #ifdef ASSERT
1108 thread->last_frame().interpreter_frame_verify_monitor(elem);
1109 #endif
1110 IRT_END
1111
1112
1113 //%note monitor_1
1114 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
1115 #ifdef ASSERT
1116 thread->last_frame().interpreter_frame_verify_monitor(elem);
1117 #endif
1118 Handle h_obj(thread, elem->obj());
1119 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1120 "must be NULL or an object");
1121 if (elem == NULL || h_obj()->is_unlocked()) {
1122 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1123 }
1124 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
1125 // Free entry. This must be done here, since a pending exception might be installed on
1126 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
1127 elem->set_obj(NULL);
1128 #ifdef ASSERT
1129 thread->last_frame().interpreter_frame_verify_monitor(elem);
1130 #endif
1131 IRT_END
1132
1133
1134 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
1135 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1136 IRT_END
1137
1138
1139 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
1140 // Returns an illegal exception to install into the current thread. The
1141 // pending_exception flag is cleared so normal exception handling does not
1142 // trigger. Any current installed exception will be overwritten. This
1143 // method will be called during an exception unwind.
1144
1145 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1146 Handle exception(thread, thread->vm_result());
1147 assert(exception() != NULL, "vm result should be set");
1148 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1149 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
1150 exception = get_preinitialized_exception(
1151 SystemDictionary::IllegalMonitorStateException_klass(),
1152 CATCH);
1153 }
1154 thread->set_vm_result(exception());
1155 IRT_END
1156
1157
1158 //------------------------------------------------------------------------------------------------------------------------
1159 // Invokes
1160
1161 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
1162 return method->orig_bytecode_at(method->bci_from(bcp));
1163 IRT_END
1164
1165 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
1166 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1167 IRT_END
1168
1169 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
1170 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
1171 IRT_END
1172
1173 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
1174 Thread* THREAD = thread;
1175 LastFrameAccessor last_frame(thread);
1176 // extract receiver from the outgoing argument list if necessary
1177 Handle receiver(thread, NULL);
1178 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1179 bytecode == Bytecodes::_invokespecial) {
1180 ResourceMark rm(thread);
1181 methodHandle m (thread, last_frame.method());
1182 Bytecode_invoke call(m, last_frame.bci());
1183 Symbol* signature = call.signature();
1184 receiver = Handle(thread, last_frame.callee_receiver(signature));
1185
1186 assert(Universe::heap()->is_in_reserved_or_null(receiver())
1187 || VTBuffer::is_in_vt_buffer(receiver()),
1188 "sanity check");
1189 assert(receiver.is_null() ||
1190 !Universe::heap()->is_in_reserved(receiver->klass()),
1191 "sanity check");
1192 }
1193
1194 // resolve method
1195 CallInfo info;
1196 constantPoolHandle pool(thread, last_frame.method()->constants());
1197
1198 {
1199 JvmtiHideSingleStepping jhss(thread);
1200 LinkResolver::resolve_invoke(info, receiver, pool,
1201 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1202 CHECK);
1203 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
1204 int retry_count = 0;
1205 while (info.resolved_method()->is_old()) {
1206 // It is very unlikely that method is redefined more than 100 times
1207 // in the middle of resolve. If it is looping here more than 100 times
1208 // means then there could be a bug here.
1209 guarantee((retry_count++ < 100),
1210 "Could not resolve to latest version of redefined method");
1211 // method is redefined in the middle of resolve so re-try.
1212 LinkResolver::resolve_invoke(info, receiver, pool,
1213 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1214 CHECK);
1215 }
1216 }
1217 } // end JvmtiHideSingleStepping
1218
1219 // check if link resolution caused cpCache to be updated
1220 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1221 if (cp_cache_entry->is_resolved(bytecode)) return;
1222
1223 #ifdef ASSERT
1224 if (bytecode == Bytecodes::_invokeinterface) {
1225 if (info.resolved_method()->method_holder() ==
1226 SystemDictionary::Object_klass()) {
1227 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1228 // (see also CallInfo::set_interface for details)
1229 assert(info.call_kind() == CallInfo::vtable_call ||
1230 info.call_kind() == CallInfo::direct_call, "");
1231 methodHandle rm = info.resolved_method();
1232 assert(rm->is_final() || info.has_vtable_index(),
1233 "should have been set already");
1234 } else if (!info.resolved_method()->has_itable_index()) {
1235 // Resolved something like CharSequence.toString. Use vtable not itable.
1236 assert(info.call_kind() != CallInfo::itable_call, "");
1237 } else {
1238 // Setup itable entry
1239 assert(info.call_kind() == CallInfo::itable_call, "");
1240 int index = info.resolved_method()->itable_index();
1241 assert(info.itable_index() == index, "");
1242 }
1243 } else if (bytecode == Bytecodes::_invokespecial) {
1244 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1245 } else {
1246 assert(info.call_kind() == CallInfo::direct_call ||
1247 info.call_kind() == CallInfo::vtable_call, "");
1248 }
1249 #endif
1250 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
1251 // it is not an interface. The receiver for invokespecial calls within interface
1252 // methods must be checked for every call.
1253 InstanceKlass* sender = pool->pool_holder();
1254 sender = sender->has_host_klass() ? sender->host_klass() : sender;
1255
1256 switch (info.call_kind()) {
1257 case CallInfo::direct_call:
1258 cp_cache_entry->set_direct_call(
1259 bytecode,
1260 info.resolved_method(),
1261 sender->is_interface());
1262 break;
1263 case CallInfo::vtable_call:
1264 cp_cache_entry->set_vtable_call(
1265 bytecode,
1266 info.resolved_method(),
1267 info.vtable_index());
1268 break;
1269 case CallInfo::itable_call:
1270 cp_cache_entry->set_itable_call(
1271 bytecode,
1272 info.resolved_klass(),
1273 info.resolved_method(),
1274 info.itable_index());
1275 break;
1276 default: ShouldNotReachHere();
1277 }
1278 }
1279
1280
1281 // First time execution: Resolve symbols, create a permanent MethodType object.
1282 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1283 Thread* THREAD = thread;
1284 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1285 LastFrameAccessor last_frame(thread);
1286
1287 // resolve method
1288 CallInfo info;
1289 constantPoolHandle pool(thread, last_frame.method()->constants());
1290 {
1291 JvmtiHideSingleStepping jhss(thread);
1292 LinkResolver::resolve_invoke(info, Handle(), pool,
1293 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1294 CHECK);
1295 } // end JvmtiHideSingleStepping
1296
1297 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1298 cp_cache_entry->set_method_handle(pool, info);
1299 }
1300
1301 // First time execution: Resolve symbols, create a permanent CallSite object.
1302 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1303 Thread* THREAD = thread;
1304 LastFrameAccessor last_frame(thread);
1305 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1306
1307 //TO DO: consider passing BCI to Java.
1308 // int caller_bci = last_frame.method()->bci_from(last_frame.bcp());
1309
1310 // resolve method
1311 CallInfo info;
1312 constantPoolHandle pool(thread, last_frame.method()->constants());
1313 int index = last_frame.get_index_u4(bytecode);
1314 {
1315 JvmtiHideSingleStepping jhss(thread);
1316 LinkResolver::resolve_invoke(info, Handle(), pool,
1317 index, bytecode, CHECK);
1318 } // end JvmtiHideSingleStepping
1319
1320 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1321 cp_cache_entry->set_dynamic_call(pool, info);
1322 }
1323
1324 // This function is the interface to the assembly code. It returns the resolved
1325 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1326 // This function will check for redefinition!
1327 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1328 switch (bytecode) {
1329 case Bytecodes::_getstatic:
1330 case Bytecodes::_putstatic:
1331 case Bytecodes::_getfield:
1332 case Bytecodes::_putfield:
1333 case Bytecodes::_withfield:
1334 resolve_get_put(thread, bytecode);
1335 break;
1336 case Bytecodes::_invokevirtual:
1337 case Bytecodes::_invokespecial:
1338 case Bytecodes::_invokestatic:
1339 case Bytecodes::_invokeinterface:
1340 resolve_invoke(thread, bytecode);
1341 break;
1342 case Bytecodes::_invokehandle:
1343 resolve_invokehandle(thread);
1344 break;
1345 case Bytecodes::_invokedynamic:
1346 resolve_invokedynamic(thread);
1347 break;
1348 default:
1349 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1350 break;
1351 }
1352 }
1353 IRT_END
1354
1355 //------------------------------------------------------------------------------------------------------------------------
1356 // Miscellaneous
1357
1358
1359 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1360 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1361 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1362 if (branch_bcp != NULL && nm != NULL) {
1363 // This was a successful request for an OSR nmethod. Because
1364 // frequency_counter_overflow_inner ends with a safepoint check,
1365 // nm could have been unloaded so look it up again. It's unsafe
1366 // to examine nm directly since it might have been freed and used
1367 // for something else.
1368 LastFrameAccessor last_frame(thread);
1369 Method* method = last_frame.method();
1370 int bci = method->bci_from(last_frame.bcp());
1371 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1372 }
1373 if (nm != NULL && thread->is_interp_only_mode()) {
1374 // Normally we never get an nm if is_interp_only_mode() is true, because
1375 // policy()->event has a check for this and won't compile the method when
1376 // true. However, it's possible for is_interp_only_mode() to become true
1377 // during the compilation. We don't want to return the nm in that case
1378 // because we want to continue to execute interpreted.
1379 nm = NULL;
1380 }
1381 #ifndef PRODUCT
1382 if (TraceOnStackReplacement) {
1383 if (nm != NULL) {
1384 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1385 nm->print();
1386 }
1387 }
1388 #endif
1389 return nm;
1390 }
1391
1392 IRT_ENTRY(nmethod*,
1393 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1394 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1395 // flag, in case this method triggers classloading which will call into Java.
1396 UnlockFlagSaver fs(thread);
1397
1398 LastFrameAccessor last_frame(thread);
1399 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1400 methodHandle method(thread, last_frame.method());
1401 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1402 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1403
1404 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1405 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1406 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1407
1408 if (osr_nm != NULL) {
1409 // We may need to do on-stack replacement which requires that no
1410 // monitors in the activation are biased because their
1411 // BasicObjectLocks will need to migrate during OSR. Force
1412 // unbiasing of all monitors in the activation now (even though
1413 // the OSR nmethod might be invalidated) because we don't have a
1414 // safepoint opportunity later once the migration begins.
1415 if (UseBiasedLocking) {
1416 ResourceMark rm;
1417 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1418 for( BasicObjectLock *kptr = last_frame.monitor_end();
1419 kptr < last_frame.monitor_begin();
1420 kptr = last_frame.next_monitor(kptr) ) {
1421 if( kptr->obj() != NULL ) {
1422 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1423 }
1424 }
1425 BiasedLocking::revoke(objects_to_revoke);
1426 }
1427 }
1428 return osr_nm;
1429 IRT_END
1430
1431 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1432 assert(ProfileInterpreter, "must be profiling interpreter");
1433 int bci = method->bci_from(cur_bcp);
1434 MethodData* mdo = method->method_data();
1435 if (mdo == NULL) return 0;
1436 return mdo->bci_to_di(bci);
1437 IRT_END
1438
1439 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1440 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1441 // flag, in case this method triggers classloading which will call into Java.
1442 UnlockFlagSaver fs(thread);
1443
1444 assert(ProfileInterpreter, "must be profiling interpreter");
1445 LastFrameAccessor last_frame(thread);
1446 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1447 methodHandle method(thread, last_frame.method());
1448 Method::build_interpreter_method_data(method, THREAD);
1449 if (HAS_PENDING_EXCEPTION) {
1450 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1451 CLEAR_PENDING_EXCEPTION;
1452 // and fall through...
1453 }
1454 IRT_END
1455
1456
1457 #ifdef ASSERT
1458 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1459 assert(ProfileInterpreter, "must be profiling interpreter");
1460
1461 MethodData* mdo = method->method_data();
1462 assert(mdo != NULL, "must not be null");
1463
1464 int bci = method->bci_from(bcp);
1465
1466 address mdp2 = mdo->bci_to_dp(bci);
1467 if (mdp != mdp2) {
1468 ResourceMark rm;
1469 ResetNoHandleMark rnm; // In a LEAF entry.
1470 HandleMark hm;
1471 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1472 int current_di = mdo->dp_to_di(mdp);
1473 int expected_di = mdo->dp_to_di(mdp2);
1474 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1475 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1476 int approx_bci = -1;
1477 if (current_di >= 0) {
1478 approx_bci = mdo->data_at(current_di)->bci();
1479 }
1480 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1481 mdo->print_on(tty);
1482 method->print_codes();
1483 }
1484 assert(mdp == mdp2, "wrong mdp");
1485 IRT_END
1486 #endif // ASSERT
1487
1488 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1489 assert(ProfileInterpreter, "must be profiling interpreter");
1490 ResourceMark rm(thread);
1491 HandleMark hm(thread);
1492 LastFrameAccessor last_frame(thread);
1493 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1494 MethodData* h_mdo = last_frame.method()->method_data();
1495
1496 // Grab a lock to ensure atomic access to setting the return bci and
1497 // the displacement. This can block and GC, invalidating all naked oops.
1498 MutexLocker ml(RetData_lock);
1499
1500 // ProfileData is essentially a wrapper around a derived oop, so we
1501 // need to take the lock before making any ProfileData structures.
1502 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1503 guarantee(data != NULL, "profile data must be valid");
1504 RetData* rdata = data->as_RetData();
1505 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1506 last_frame.set_mdp(new_mdp);
1507 IRT_END
1508
1509 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1510 MethodCounters* mcs = Method::build_method_counters(m, thread);
1511 if (HAS_PENDING_EXCEPTION) {
1512 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1513 CLEAR_PENDING_EXCEPTION;
1514 }
1515 return mcs;
1516 IRT_END
1517
1518
1519 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1520 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1521 // stack traversal automatically takes care of preserving arguments for invoke, so
1522 // this is no longer needed.
1523
1524 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1525 // if this is called during a safepoint
1526
1527 if (JvmtiExport::should_post_single_step()) {
1528 // We are called during regular safepoints and when the VM is
1529 // single stepping. If any thread is marked for single stepping,
1530 // then we may have JVMTI work to do.
1531 LastFrameAccessor last_frame(thread);
1532 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1533 }
1534 IRT_END
1535
1536 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1537 ConstantPoolCacheEntry *cp_entry))
1538
1539 // check the access_flags for the field in the klass
1540
1541 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1542 int index = cp_entry->field_index();
1543 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1544
1545 bool is_static = (obj == NULL);
1546 HandleMark hm(thread);
1547
1548 Handle h_obj;
1549 if (!is_static) {
1550 // non-static field accessors have an object, but we need a handle
1551 h_obj = Handle(thread, obj);
1552 }
1553 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1554 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1555 LastFrameAccessor last_frame(thread);
1556 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1557 IRT_END
1558
1559 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1560 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1561
1562 Klass* k = cp_entry->f1_as_klass();
1563
1564 // check the access_flags for the field in the klass
1565 InstanceKlass* ik = InstanceKlass::cast(k);
1566 int index = cp_entry->field_index();
1567 // bail out if field modifications are not watched
1568 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1569
1570 char sig_type = '\0';
1571
1572 switch(cp_entry->flag_state()) {
1573 case btos: sig_type = 'B'; break;
1574 case ztos: sig_type = 'Z'; break;
1575 case ctos: sig_type = 'C'; break;
1576 case stos: sig_type = 'S'; break;
1577 case itos: sig_type = 'I'; break;
1578 case ftos: sig_type = 'F'; break;
1579 case atos: sig_type = 'L'; break;
1580 case ltos: sig_type = 'J'; break;
1581 case dtos: sig_type = 'D'; break;
1582 default: ShouldNotReachHere(); return;
1583 }
1584 bool is_static = (obj == NULL);
1585
1586 HandleMark hm(thread);
1587 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1588 jvalue fvalue;
1589 #ifdef _LP64
1590 fvalue = *value;
1591 #else
1592 // Long/double values are stored unaligned and also noncontiguously with
1593 // tagged stacks. We can't just do a simple assignment even in the non-
1594 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1595 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1596 // We assume that the two halves of longs/doubles are stored in interpreter
1597 // stack slots in platform-endian order.
1598 jlong_accessor u;
1599 jint* newval = (jint*)value;
1600 u.words[0] = newval[0];
1601 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1602 fvalue.j = u.long_value;
1603 #endif // _LP64
1604
1605 Handle h_obj;
1606 if (!is_static) {
1607 // non-static field accessors have an object, but we need a handle
1608 h_obj = Handle(thread, obj);
1609 }
1610
1611 LastFrameAccessor last_frame(thread);
1612 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1613 fid, sig_type, &fvalue);
1614 IRT_END
1615
1616 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1617 LastFrameAccessor last_frame(thread);
1618 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1619 IRT_END
1620
1621
1622 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1623 LastFrameAccessor last_frame(thread);
1624 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1625 IRT_END
1626
1627 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1628 {
1629 return (Interpreter::contains(pc) ? 1 : 0);
1630 }
1631 IRT_END
1632
1633
1634 // Implementation of SignatureHandlerLibrary
1635
1636 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1637 // Dummy definition (else normalization method is defined in CPU
1638 // dependant code)
1639 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1640 return fingerprint;
1641 }
1642 #endif
1643
1644 address SignatureHandlerLibrary::set_handler_blob() {
1645 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1646 if (handler_blob == NULL) {
1647 return NULL;
1648 }
1649 address handler = handler_blob->code_begin();
1650 _handler_blob = handler_blob;
1651 _handler = handler;
1652 return handler;
1653 }
1654
1655 void SignatureHandlerLibrary::initialize() {
1656 if (_fingerprints != NULL) {
1657 return;
1658 }
1659 if (set_handler_blob() == NULL) {
1660 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1661 }
1662
1663 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1664 SignatureHandlerLibrary::buffer_size);
1665 _buffer = bb->code_begin();
1666
1667 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1668 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1669 }
1670
1671 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1672 address handler = _handler;
1673 int insts_size = buffer->pure_insts_size();
1674 if (handler + insts_size > _handler_blob->code_end()) {
1675 // get a new handler blob
1676 handler = set_handler_blob();
1677 }
1678 if (handler != NULL) {
1679 memcpy(handler, buffer->insts_begin(), insts_size);
1680 pd_set_handler(handler);
1681 ICache::invalidate_range(handler, insts_size);
1682 _handler = handler + insts_size;
1683 }
1684 return handler;
1685 }
1686
1687 void SignatureHandlerLibrary::add(const methodHandle& method) {
1688 if (method->signature_handler() == NULL) {
1689 // use slow signature handler if we can't do better
1690 int handler_index = -1;
1691 // check if we can use customized (fast) signature handler
1692 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1693 // use customized signature handler
1694 MutexLocker mu(SignatureHandlerLibrary_lock);
1695 // make sure data structure is initialized
1696 initialize();
1697 // lookup method signature's fingerprint
1698 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1699 // allow CPU dependant code to optimize the fingerprints for the fast handler
1700 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1701 handler_index = _fingerprints->find(fingerprint);
1702 // create handler if necessary
1703 if (handler_index < 0) {
1704 ResourceMark rm;
1705 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1706 CodeBuffer buffer((address)(_buffer + align_offset),
1707 SignatureHandlerLibrary::buffer_size - align_offset);
1708 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1709 // copy into code heap
1710 address handler = set_handler(&buffer);
1711 if (handler == NULL) {
1712 // use slow signature handler (without memorizing it in the fingerprints)
1713 } else {
1714 // debugging suppport
1715 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1716 ttyLocker ttyl;
1717 tty->cr();
1718 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1719 _handlers->length(),
1720 (method->is_static() ? "static" : "receiver"),
1721 method->name_and_sig_as_C_string(),
1722 fingerprint,
1723 buffer.insts_size());
1724 if (buffer.insts_size() > 0) {
1725 Disassembler::decode(handler, handler + buffer.insts_size());
1726 }
1727 #ifndef PRODUCT
1728 address rh_begin = Interpreter::result_handler(method()->result_type());
1729 if (CodeCache::contains(rh_begin)) {
1730 // else it might be special platform dependent values
1731 tty->print_cr(" --- associated result handler ---");
1732 address rh_end = rh_begin;
1733 while (*(int*)rh_end != 0) {
1734 rh_end += sizeof(int);
1735 }
1736 Disassembler::decode(rh_begin, rh_end);
1737 } else {
1738 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1739 }
1740 #endif
1741 }
1742 // add handler to library
1743 _fingerprints->append(fingerprint);
1744 _handlers->append(handler);
1745 // set handler index
1746 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1747 handler_index = _fingerprints->length() - 1;
1748 }
1749 }
1750 // Set handler under SignatureHandlerLibrary_lock
1751 if (handler_index < 0) {
1752 // use generic signature handler
1753 method->set_signature_handler(Interpreter::slow_signature_handler());
1754 } else {
1755 // set handler
1756 method->set_signature_handler(_handlers->at(handler_index));
1757 }
1758 } else {
1759 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1760 // use generic signature handler
1761 method->set_signature_handler(Interpreter::slow_signature_handler());
1762 }
1763 }
1764 #ifdef ASSERT
1765 int handler_index = -1;
1766 int fingerprint_index = -2;
1767 {
1768 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1769 // in any way if accessed from multiple threads. To avoid races with another
1770 // thread which may change the arrays in the above, mutex protected block, we
1771 // have to protect this read access here with the same mutex as well!
1772 MutexLocker mu(SignatureHandlerLibrary_lock);
1773 if (_handlers != NULL) {
1774 handler_index = _handlers->find(method->signature_handler());
1775 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1776 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1777 fingerprint_index = _fingerprints->find(fingerprint);
1778 }
1779 }
1780 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1781 handler_index == fingerprint_index, "sanity check");
1782 #endif // ASSERT
1783 }
1784
1785 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1786 int handler_index = -1;
1787 // use customized signature handler
1788 MutexLocker mu(SignatureHandlerLibrary_lock);
1789 // make sure data structure is initialized
1790 initialize();
1791 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1792 handler_index = _fingerprints->find(fingerprint);
1793 // create handler if necessary
1794 if (handler_index < 0) {
1795 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1796 tty->cr();
1797 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1798 _handlers->length(),
1799 p2i(handler),
1800 fingerprint);
1801 }
1802 _fingerprints->append(fingerprint);
1803 _handlers->append(handler);
1804 } else {
1805 if (PrintSignatureHandlers) {
1806 tty->cr();
1807 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1808 _handlers->length(),
1809 fingerprint,
1810 p2i(_handlers->at(handler_index)),
1811 p2i(handler));
1812 }
1813 }
1814 }
1815
1816
1817 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1818 address SignatureHandlerLibrary::_handler = NULL;
1819 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1820 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1821 address SignatureHandlerLibrary::_buffer = NULL;
1822
1823
1824 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1825 methodHandle m(thread, method);
1826 assert(m->is_native(), "sanity check");
1827 // lookup native function entry point if it doesn't exist
1828 bool in_base_library;
1829 if (!m->has_native_function()) {
1830 NativeLookup::lookup(m, in_base_library, CHECK);
1831 }
1832 // make sure signature handler is installed
1833 SignatureHandlerLibrary::add(m);
1834 // The interpreter entry point checks the signature handler first,
1835 // before trying to fetch the native entry point and klass mirror.
1836 // We must set the signature handler last, so that multiple processors
1837 // preparing the same method will be sure to see non-null entry & mirror.
1838 IRT_END
1839
1840 IRT_ENTRY(void, InterpreterRuntime::deoptimize_caller_frame_for_vt(JavaThread* thread, Method* callee))
1841 // Called from within the owner thread, so no need for safepoint
1842 if (!callee->is_known_returning_vt() && !callee->is_known_not_returning_vt()) {
1843 callee->check_returning_vt(thread);
1844 }
1845 if (!callee->is_known_returning_vt()) {
1846 // deoptimize the caller only if it was compiled code that's calling a method that returns
1847 // a value type. In this case, the return type must have already been resolved.
1848 return;
1849 }
1850 RegisterMap reg_map(thread);
1851 frame last_frame = thread->last_frame();
1852 frame caller_frame = last_frame.sender(®_map);
1853 Deoptimization::deoptimize_frame(thread, caller_frame.id());
1854 IRT_END
1855
1856 #if defined(IA32) || defined(AMD64) || defined(ARM)
1857 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1858 if (src_address == dest_address) {
1859 return;
1860 }
1861 ResetNoHandleMark rnm; // In a LEAF entry.
1862 HandleMark hm;
1863 ResourceMark rm;
1864 LastFrameAccessor last_frame(thread);
1865 assert(last_frame.is_interpreted_frame(), "");
1866 jint bci = last_frame.bci();
1867 methodHandle mh(thread, last_frame.method());
1868 Bytecode_invoke invoke(mh, bci);
1869 ArgumentSizeComputer asc(invoke.signature());
1870 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1871 Copy::conjoint_jbytes(src_address, dest_address,
1872 size_of_arguments * Interpreter::stackElementSize);
1873 IRT_END
1874 #endif
1875
1876 #if INCLUDE_JVMTI
1877 // This is a support of the JVMTI PopFrame interface.
1878 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1879 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1880 // The member_name argument is a saved reference (in local#0) to the member_name.
1881 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1882 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1883 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1884 Method* method, address bcp))
1885 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1886 if (code != Bytecodes::_invokestatic) {
1887 return;
1888 }
1889 ConstantPool* cpool = method->constants();
1890 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1891 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1892 Symbol* mname = cpool->name_ref_at(cp_index);
1893
1894 if (MethodHandles::has_member_arg(cname, mname)) {
1895 oop member_name_oop = (oop) member_name;
1896 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1897 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1898 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1899 }
1900 thread->set_vm_result(member_name_oop);
1901 } else {
1902 thread->set_vm_result(NULL);
1903 }
1904 IRT_END
1905 #endif // INCLUDE_JVMTI
1906
1907 #ifndef PRODUCT
1908 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1909 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1910 // The generated code still uses call_VM because that will set up the frame pointer for
1911 // bcp and method.
1912 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1913 LastFrameAccessor last_frame(thread);
1914 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1915 methodHandle mh(thread, last_frame.method());
1916 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1917 return preserve_this_value;
1918 IRT_END
1919 #endif // !PRODUCT