1 /*
2 * Copyright (c) 1997, 2019, 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/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/barrierSetNMethod.hpp"
34 #include "gc/shared/collectedHeap.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "interpreter/interpreterRuntime.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "interpreter/templateTable.hpp"
39 #include "logging/log.hpp"
40 #include "memory/oopFactory.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.hpp"
43 #include "oops/constantPool.hpp"
44 #include "oops/cpCache.inline.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/methodData.hpp"
47 #include "oops/objArrayKlass.hpp"
48 #include "oops/objArrayOop.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "oops/symbol.hpp"
51 #include "oops/valueKlass.hpp"
52 #include "oops/valueArrayKlass.hpp"
53 #include "oops/valueArrayOop.hpp"
54 #include "oops/valueArrayOop.inline.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/nativeLookup.hpp"
57 #include "runtime/atomic.hpp"
58 #include "runtime/biasedLocking.hpp"
59 #include "runtime/compilationPolicy.hpp"
60 #include "runtime/deoptimization.hpp"
61 #include "runtime/fieldDescriptor.inline.hpp"
62 #include "runtime/frame.inline.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/icache.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jfieldIDWorkaround.hpp"
69 #include "runtime/osThread.hpp"
70 #include "runtime/sharedRuntime.hpp"
71 #include "runtime/stubRoutines.hpp"
72 #include "runtime/synchronizer.hpp"
73 #include "runtime/threadCritical.hpp"
74 #include "utilities/align.hpp"
75 #include "utilities/copy.hpp"
76 #include "utilities/events.hpp"
77 #include "utilities/globalDefinitions.hpp"
78 #ifdef COMPILER2
79 #include "opto/runtime.hpp"
80 #endif
81
82 class UnlockFlagSaver {
83 private:
84 JavaThread* _thread;
85 bool _do_not_unlock;
86 public:
87 UnlockFlagSaver(JavaThread* t) {
88 _thread = t;
89 _do_not_unlock = t->do_not_unlock_if_synchronized();
90 t->set_do_not_unlock_if_synchronized(false);
91 }
92 ~UnlockFlagSaver() {
93 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
94 }
95 };
96
97 // Helper class to access current interpreter state
98 class LastFrameAccessor : public StackObj {
99 frame _last_frame;
100 public:
101 LastFrameAccessor(JavaThread* thread) {
102 assert(thread == Thread::current(), "sanity");
103 _last_frame = thread->last_frame();
104 }
105 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
106 Method* method() const { return _last_frame.interpreter_frame_method(); }
107 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
108 int bci() const { return _last_frame.interpreter_frame_bci(); }
109 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
110
111 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
112 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
113
114 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
115 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
116
117 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
118 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
119 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
120 int get_index_u2_cpcache(Bytecodes::Code bc) const
121 { return bytecode().get_index_u2_cpcache(bc); }
122 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
123 int number_of_dimensions() const { return bcp()[3]; }
124 ConstantPoolCacheEntry* cache_entry_at(int i) const
125 { return method()->constants()->cache()->entry_at(i); }
126 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
127
128 oop callee_receiver(Symbol* signature) {
129 return _last_frame.interpreter_callee_receiver(signature);
130 }
131 BasicObjectLock* monitor_begin() const {
132 return _last_frame.interpreter_frame_monitor_begin();
133 }
134 BasicObjectLock* monitor_end() const {
135 return _last_frame.interpreter_frame_monitor_end();
136 }
137 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
138 return _last_frame.next_monitor_in_interpreter_frame(current);
139 }
140
141 frame& get_frame() { return _last_frame; }
142 };
143
144 //------------------------------------------------------------------------------------------------------------------------
145 // State accessors
146
147 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
148 LastFrameAccessor last_frame(thread);
149 last_frame.set_bcp(bcp);
150 if (ProfileInterpreter) {
151 // ProfileTraps uses MDOs independently of ProfileInterpreter.
152 // That is why we must check both ProfileInterpreter and mdo != NULL.
153 MethodData* mdo = last_frame.method()->method_data();
154 if (mdo != NULL) {
155 NEEDS_CLEANUP;
156 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
157 }
158 }
159 }
160
161 //------------------------------------------------------------------------------------------------------------------------
162 // Constants
163
164
165 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
166 // access constant pool
167 LastFrameAccessor last_frame(thread);
168 ConstantPool* pool = last_frame.method()->constants();
169 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
170 constantTag tag = pool->tag_at(index);
171
172 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
173 Klass* klass = pool->klass_at(index, CHECK);
174 oop java_class = klass->java_mirror();
175 thread->set_vm_result(java_class);
176 JRT_END
177
178 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
179 assert(bytecode == Bytecodes::_ldc ||
180 bytecode == Bytecodes::_ldc_w ||
181 bytecode == Bytecodes::_ldc2_w ||
182 bytecode == Bytecodes::_fast_aldc ||
183 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
184 ResourceMark rm(thread);
185 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
186 bytecode == Bytecodes::_fast_aldc_w);
187 LastFrameAccessor last_frame(thread);
188 methodHandle m (thread, last_frame.method());
189 Bytecode_loadconstant ldc(m, last_frame.bci());
190
191 // Double-check the size. (Condy can have any type.)
192 BasicType type = ldc.result_type();
193 switch (type2size[type]) {
194 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
195 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
196 default: ShouldNotReachHere();
197 }
198
199 // Resolve the constant. This does not do unboxing.
200 // But it does replace Universe::the_null_sentinel by null.
201 oop result = ldc.resolve_constant(CHECK);
202 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
203
204 #ifdef ASSERT
205 {
206 // The bytecode wrappers aren't GC-safe so construct a new one
207 Bytecode_loadconstant ldc2(m, last_frame.bci());
208 int rindex = ldc2.cache_index();
209 if (rindex < 0)
210 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
211 if (rindex >= 0) {
212 oop coop = m->constants()->resolved_references()->obj_at(rindex);
213 oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
214 assert(roop == coop, "expected result for assembly code");
215 }
216 }
217 #endif
218 thread->set_vm_result(result);
219 if (!is_fast_aldc) {
220 // Tell the interpreter how to unbox the primitive.
221 guarantee(java_lang_boxing_object::is_instance(result, type), "");
222 int offset = java_lang_boxing_object::value_offset_in_bytes(type);
223 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
224 | (offset & ConstantPoolCacheEntry::field_index_mask));
225 thread->set_vm_result_2((Metadata*)flags);
226 }
227 }
228 JRT_END
229
230
231 //------------------------------------------------------------------------------------------------------------------------
232 // Allocation
233
234 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
235 Klass* k = pool->klass_at(index, CHECK);
236 InstanceKlass* klass = InstanceKlass::cast(k);
237
238 // Make sure we are not instantiating an abstract klass
239 klass->check_valid_for_instantiation(true, CHECK);
240
241 // Make sure klass is initialized
242 klass->initialize(CHECK);
243
244 // At this point the class may not be fully initialized
245 // because of recursive initialization. If it is fully
246 // initialized & has_finalized is not set, we rewrite
247 // it into its fast version (Note: no locking is needed
248 // here since this is an atomic byte write and can be
249 // done more than once).
250 //
251 // Note: In case of classes with has_finalized we don't
252 // rewrite since that saves us an extra check in
253 // the fast version which then would call the
254 // slow version anyway (and do a call back into
255 // Java).
256 // If we have a breakpoint, then we don't rewrite
257 // because the _breakpoint bytecode would be lost.
258 oop obj = klass->allocate_instance(CHECK);
259 thread->set_vm_result(obj);
260 JRT_END
261
262 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) {
263 switch (type) {
264 case T_BOOLEAN:
265 instance()->bool_field_put(offset, (jboolean)*((int*)addr));
266 break;
267 case T_CHAR:
268 instance()->char_field_put(offset, (jchar) *((int*)addr));
269 break;
270 case T_FLOAT:
271 instance()->float_field_put(offset, (jfloat)*((float*)addr));
272 break;
273 case T_DOUBLE:
274 instance()->double_field_put(offset, (jdouble)*((double*)addr));
275 break;
276 case T_BYTE:
277 instance()->byte_field_put(offset, (jbyte)*((int*)addr));
278 break;
279 case T_SHORT:
280 instance()->short_field_put(offset, (jshort)*((int*)addr));
281 break;
282 case T_INT:
283 instance()->int_field_put(offset, (jint)*((int*)addr));
284 break;
285 case T_LONG:
286 instance()->long_field_put(offset, (jlong)*((long long*)addr));
287 break;
288 case T_OBJECT:
289 case T_ARRAY:
290 case T_VALUETYPE:
291 fatal("Should not be handled with this method");
292 break;
293 default:
294 fatal("Unsupported BasicType");
295 }
296 }
297
298 JRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* thread, ConstantPool* pool, int index))
299 // Getting the ValueKlass
300 Klass* k = pool->klass_at(index, CHECK);
301 assert(k->is_value(), "defaultvalue argument must be the value type class");
302 ValueKlass* vklass = ValueKlass::cast(k);
303
304 vklass->initialize(THREAD);
305 oop res = vklass->default_value();
306 thread->set_vm_result(res);
307 JRT_END
308
309 JRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* thread, ConstantPoolCache* cp_cache))
310 LastFrameAccessor last_frame(thread);
311 // Getting the ValueKlass
312 int index = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_withfield));
313 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
314 assert(cp_entry->is_resolved(Bytecodes::_withfield), "Should have been resolved");
315 Klass* klass = cp_entry->f1_as_klass();
316 assert(klass->is_value(), "withfield only applies to value types");
317 ValueKlass* vklass = ValueKlass::cast(klass);
318
319 // Getting Field information
320 int offset = cp_entry->f2_as_index();
321 int field_index = cp_entry->field_index();
322 int field_offset = cp_entry->f2_as_offset();
323 Symbol* field_signature = vklass->field_signature(field_index);
324 ResourceMark rm(THREAD);
325 const char* signature = (const char *) field_signature->as_utf8();
326 BasicType field_type = char2type(signature[0]);
327
328 // Getting old value
329 frame& f = last_frame.get_frame();
330 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1;
331 int vt_offset = type2size[field_type];
332 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset);
333 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver");
334 Handle old_value_h(THREAD, old_value);
335
336 // Creating new value by copying the one passed in argument
337 instanceOop new_value = vklass->allocate_instance(
338 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
339 Handle new_value_h = Handle(THREAD, new_value);
340 int first_offset = vklass->first_field_offset();
341 vklass->value_store(vklass->data_for_oop(old_value_h()),
342 vklass->data_for_oop(new_value_h()), true, false);
343
344 // Updating the field specified in arguments
345 if (field_type == T_ARRAY || field_type == T_OBJECT) {
346 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
347 assert(aoop == NULL || oopDesc::is_oop(aoop),"argument must be a reference type");
348 new_value_h()->obj_field_put(field_offset, aoop);
349 } else if (field_type == T_VALUETYPE) {
350 if (cp_entry->is_flattened()) {
351 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
352 if (vt_oop == NULL) {
353 THROW_(vmSymbols::java_lang_NullPointerException(),
354 (type2size[field_type] * AbstractInterpreter::stackElementSize));
355 }
356 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type");
357 Klass* field_k = vklass->get_value_field_klass(field_index);
358 ValueKlass* field_vk = ValueKlass::cast(field_k);
359 assert(field_vk == vt_oop->klass(), "Must match");
360 field_vk->value_store(field_vk->data_for_oop(vt_oop),
361 ((char*)(oopDesc*)new_value_h()) + field_offset, false, false);
362 } else { // not flattened
363 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
364 if (voop == NULL && cp_entry->is_flattenable()) {
365 THROW_(vmSymbols::java_lang_NullPointerException(),
366 (type2size[field_type] * AbstractInterpreter::stackElementSize));
367 }
368 assert(voop == NULL || oopDesc::is_oop(voop),"checking argument");
369 new_value_h()->obj_field_put(field_offset, voop);
370 }
371 } else { // not T_OBJECT nor T_ARRAY nor T_VALUETYPE
372 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx);
373 copy_primitive_argument(addr, new_value_h, field_offset, field_type);
374 }
375
376 // returning result
377 thread->set_vm_result(new_value_h());
378 return (type2size[field_type] + type2size[T_OBJECT]) * AbstractInterpreter::stackElementSize;
379 JRT_END
380
381 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_value_field(JavaThread* thread, oopDesc* mirror, int index))
382 // The interpreter tries to access a flattenable static field that has not been initialized.
383 // This situation can happen in different scenarios:
384 // 1 - if the load or initialization of the field failed during step 8 of
385 // the initialization of the holder of the field, in this case the access to the field
386 // must fail
387 // 2 - it can also happen when the initialization of the holder class triggered the initialization of
388 // another class which accesses this field in its static initializer, in this case the
389 // access must succeed to allow circularity
390 // The code below tries to load and initialize the field's class again before returning the default value.
391 // If the field was not initialized because of an error, a exception should be thrown.
392 // If the class is being initialized, the default value is returned.
393 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
394 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
395 if (klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD)) {
396 int offset = klass->field_offset(index);
397 Klass* field_k = klass->get_value_field_klass_or_null(index);
398 if (field_k == NULL) {
399 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD),
400 Handle(THREAD, klass->class_loader()),
401 Handle(THREAD, klass->protection_domain()),
402 true, CHECK);
403 assert(field_k != NULL, "Should have been loaded or an exception thrown above");
404 klass->set_value_field_klass(index, field_k);
405 }
406 field_k->initialize(CHECK);
407 oop defaultvalue = ValueKlass::cast(field_k)->default_value();
408 // It is safe to initialized the static field because 1) the current thread is the initializing thread
409 // and is the only one that can access it, and 2) the field is actually not initialized (i.e. null)
410 // otherwise the JVM should not be executing this code.
411 mirror->obj_field_put(offset, defaultvalue);
412 thread->set_vm_result(defaultvalue);
413 } else {
414 assert(klass->is_in_error_state(), "If not initializing, initialization must have failed to get there");
415 ResourceMark rm(THREAD);
416 const char* desc = "Could not initialize class ";
417 const char* className = klass->external_name();
418 size_t msglen = strlen(desc) + strlen(className) + 1;
419 char* message = NEW_RESOURCE_ARRAY(char, msglen);
420 if (NULL == message) {
421 // Out of memory: can't create detailed error message
422 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);
423 } else {
424 jio_snprintf(message, msglen, "%s%s", desc, className);
425 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message);
426 }
427 }
428 JRT_END
429
430 JRT_ENTRY(void, InterpreterRuntime::uninitialized_instance_value_field(JavaThread* thread, oopDesc* obj, int index))
431 instanceHandle obj_h(THREAD, (instanceOop)obj);
432 InstanceKlass* klass = InstanceKlass::cast(obj_h()->klass());
433 Klass* field_k = klass->get_value_field_klass_or_null(index);
434 assert(field_k != NULL, "Must have been initialized");
435 ValueKlass* field_vklass = ValueKlass::cast(field_k);
436 assert(field_vklass->is_initialized(), "Must have been initialized at this point");
437 instanceOop res = (instanceOop)field_vklass->default_value();
438 thread->set_vm_result(res);
439 JRT_END
440
441 JRT_ENTRY(void, InterpreterRuntime::write_flattened_value(JavaThread* thread, oopDesc* value, int offset, oopDesc* rcv))
442 assert(oopDesc::is_oop(value), "Sanity check");
443 assert(oopDesc::is_oop(rcv), "Sanity check");
444 assert(value->is_value(), "Sanity check");
445
446 ValueKlass* vklass = ValueKlass::cast(value->klass());
447 if (!vklass->is_empty_value()) {
448 vklass->value_store(vklass->data_for_oop(value), ((char*)(oopDesc*)rcv) + offset, true, true);
449 }
450 JRT_END
451
452 JRT_ENTRY(void, InterpreterRuntime::read_flattened_field(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder))
453 Handle obj_h(THREAD, obj);
454
455 assert(oopDesc::is_oop(obj), "Sanity check");
456
457 assert(field_holder->is_instance_klass(), "Sanity check");
458 InstanceKlass* klass = InstanceKlass::cast(field_holder);
459
460 assert(klass->field_is_flattened(index), "Sanity check");
461
462 ValueKlass* field_vklass = ValueKlass::cast(klass->get_value_field_klass(index));
463 assert(field_vklass->is_initialized(), "Must be initialized at this point");
464
465 instanceOop res = NULL;
466 if (field_vklass->is_empty_value()) {
467 res = (instanceOop)field_vklass->default_value();
468 } else {
469 // allocate instance
470 res = field_vklass->allocate_instance(CHECK);
471 // copy value
472 field_vklass->value_store(((char*)(oopDesc*)obj_h()) + klass->field_offset(index),
473 field_vklass->data_for_oop(res), true, true);
474 }
475 assert(res != NULL, "Must be set in one of two paths above");
476 thread->set_vm_result(res);
477 JRT_END
478
479 JRT_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 JRT_END
483
484
485 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
486 Klass* klass = pool->klass_at(index, CHECK);
487 bool is_qtype_desc = pool->tag_at(index).is_Qdescriptor_klass();
488 arrayOop obj;
489 if ((!klass->is_array_klass()) && is_qtype_desc) { // Logically creates elements, ensure klass init
490 klass->initialize(CHECK);
491 obj = oopFactory::new_valueArray(klass, size, CHECK);
492 } else {
493 obj = oopFactory::new_objArray(klass, size, CHECK);
494 }
495 thread->set_vm_result(obj);
496 JRT_END
497
498 JRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
499 Klass* klass = array->klass();
500 assert(klass->is_valueArray_klass(), "expected value array oop");
501
502 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
503 ValueKlass* vklass = vaklass->element_klass();
504 arrayHandle ah(THREAD, array);
505 instanceOop value_holder = NULL;
506 if (vklass->is_empty_value()) {
507 value_holder = (instanceOop)vklass->default_value();
508 } else {
509 value_holder = vklass->allocate_instance(CHECK);
510 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper());
511 vklass->value_store(src, vklass->data_for_oop(value_holder),
512 vaklass->element_byte_size(), true, false);
513 }
514 assert(value_holder != NULL, "Must be set in one of two paths above");
515 thread->set_vm_result(value_holder);
516 JRT_END
517
518 JRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, void* val, arrayOopDesc* array, int index))
519 assert(val != NULL, "can't store null into flat array");
520 Klass* klass = array->klass();
521 assert(klass->is_valueArray_klass(), "expected value array");
522 assert(ArrayKlass::cast(klass)->element_klass() == ((oop)val)->klass(), "Store type incorrect");
523
524 valueArrayOop varray = (valueArrayOop)array;
525 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
526 ValueKlass* vklass = vaklass->element_klass();
527 if (!vklass->is_empty_value()) {
528 const int lh = vaklass->layout_helper();
529 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
530 vaklass->element_byte_size(), true, false);
531 }
532 JRT_END
533
534 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
535 // We may want to pass in more arguments - could make this slightly faster
536 LastFrameAccessor last_frame(thread);
537 ConstantPool* constants = last_frame.method()->constants();
538 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
539 Klass* klass = constants->klass_at(i, CHECK);
540 bool is_qtype = klass->name()->is_Q_array_signature();
541 int nof_dims = last_frame.number_of_dimensions();
542 assert(klass->is_klass(), "not a class");
543 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
544
545 if (is_qtype) { // Logically creates elements, ensure klass init
546 klass->initialize(CHECK);
547 }
548
549 // We must create an array of jints to pass to multi_allocate.
550 ResourceMark rm(thread);
551 const int small_dims = 10;
552 jint dim_array[small_dims];
553 jint *dims = &dim_array[0];
554 if (nof_dims > small_dims) {
555 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
556 }
557 for (int index = 0; index < nof_dims; index++) {
558 // offset from first_size_address is addressed as local[index]
559 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
560 dims[index] = first_size_address[n];
561 }
562 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
563 thread->set_vm_result(obj);
564 JRT_END
565
566
567 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
568 assert(oopDesc::is_oop(obj), "must be a valid oop");
569 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
570 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
571 JRT_END
572
573 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* thread, oopDesc* aobj, oopDesc* bobj))
574 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
575
576 Handle ha(THREAD, aobj);
577 Handle hb(THREAD, bobj);
578 JavaValue result(T_BOOLEAN);
579 JavaCallArguments args;
580 args.push_oop(ha);
581 args.push_oop(hb);
582 methodHandle method(Universe::is_substitutable_method());
583 JavaCalls::call(&result, method, &args, THREAD);
584 guarantee(!HAS_PENDING_EXCEPTION, "isSubstitutable() raised exception");
585 return result.get_jboolean();
586 JRT_END
587
588 // Quicken instance-of and check-cast bytecodes
589 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
590 // Force resolving; quicken the bytecode
591 LastFrameAccessor last_frame(thread);
592 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
593 ConstantPool* cpool = last_frame.method()->constants();
594 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
595 // program we might have seen an unquick'd bytecode in the interpreter but have another
596 // thread quicken the bytecode before we get here.
597 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
598 Klass* klass = cpool->klass_at(which, CHECK);
599 thread->set_vm_result_2(klass);
600 JRT_END
601
602
603 //------------------------------------------------------------------------------------------------------------------------
604 // Exceptions
605
606 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
607 const methodHandle& trap_method, int trap_bci, TRAPS) {
608 if (trap_method.not_null()) {
609 MethodData* trap_mdo = trap_method->method_data();
610 if (trap_mdo == NULL) {
611 Method::build_interpreter_method_data(trap_method, THREAD);
612 if (HAS_PENDING_EXCEPTION) {
613 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
614 "we expect only an OOM error here");
615 CLEAR_PENDING_EXCEPTION;
616 }
617 trap_mdo = trap_method->method_data();
618 // and fall through...
619 }
620 if (trap_mdo != NULL) {
621 // Update per-method count of trap events. The interpreter
622 // is updating the MDO to simulate the effect of compiler traps.
623 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
624 }
625 }
626 }
627
628 // Assume the compiler is (or will be) interested in this event.
629 // If necessary, create an MDO to hold the information, and record it.
630 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
631 assert(ProfileTraps, "call me only if profiling");
632 LastFrameAccessor last_frame(thread);
633 methodHandle trap_method(thread, last_frame.method());
634 int trap_bci = trap_method->bci_from(last_frame.bcp());
635 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
636 }
637
638 #ifdef CC_INTERP
639 // As legacy note_trap, but we have more arguments.
640 JRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
641 methodHandle trap_method(method);
642 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
643 JRT_END
644
645 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
646 // for each exception.
647 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
648 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
649 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
650 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
651 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
652 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
653 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
654 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
655 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
656 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
657 #endif // CC_INTERP
658
659
660 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
661 // get klass
662 InstanceKlass* klass = InstanceKlass::cast(k);
663 assert(klass->is_initialized(),
664 "this klass should have been initialized during VM initialization");
665 // create instance - do not call constructor since we may have no
666 // (java) stack space left (should assert constructor is empty)
667 Handle exception;
668 oop exception_oop = klass->allocate_instance(CHECK_(exception));
669 exception = Handle(THREAD, exception_oop);
670 if (StackTraceInThrowable) {
671 java_lang_Throwable::fill_in_stack_trace(exception);
672 }
673 return exception;
674 }
675
676 // Special handling for stack overflow: since we don't have any (java) stack
677 // space left we use the pre-allocated & pre-initialized StackOverflowError
678 // klass to create an stack overflow error instance. We do not call its
679 // constructor for the same reason (it is empty, anyway).
680 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
681 Handle exception = get_preinitialized_exception(
682 SystemDictionary::StackOverflowError_klass(),
683 CHECK);
684 // Increment counter for hs_err file reporting
685 Atomic::inc(&Exceptions::_stack_overflow_errors);
686 THROW_HANDLE(exception);
687 JRT_END
688
689 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
690 Handle exception = get_preinitialized_exception(
691 SystemDictionary::StackOverflowError_klass(),
692 CHECK);
693 java_lang_Throwable::set_message(exception(),
694 Universe::delayed_stack_overflow_error_message());
695 // Increment counter for hs_err file reporting
696 Atomic::inc(&Exceptions::_stack_overflow_errors);
697 THROW_HANDLE(exception);
698 JRT_END
699
700 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
701 // lookup exception klass
702 TempNewSymbol s = SymbolTable::new_symbol(name);
703 if (ProfileTraps) {
704 if (s == vmSymbols::java_lang_ArithmeticException()) {
705 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
706 } else if (s == vmSymbols::java_lang_NullPointerException()) {
707 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
708 }
709 }
710 // create exception
711 Handle exception = Exceptions::new_exception(thread, s, message);
712 thread->set_vm_result(exception());
713 JRT_END
714
715
716 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
717 // Produce the error message first because note_trap can safepoint
718 ResourceMark rm(thread);
719 const char* klass_name = obj->klass()->external_name();
720 // lookup exception klass
721 TempNewSymbol s = SymbolTable::new_symbol(name);
722 if (ProfileTraps) {
723 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
724 }
725 // create exception, with klass name as detail message
726 Handle exception = Exceptions::new_exception(thread, s, klass_name);
727 thread->set_vm_result(exception());
728 JRT_END
729
730 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, arrayOopDesc* a, jint index))
731 // Produce the error message first because note_trap can safepoint
732 ResourceMark rm(thread);
733 stringStream ss;
734 ss.print("Index %d out of bounds for length %d", index, a->length());
735
736 if (ProfileTraps) {
737 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
738 }
739
740 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
741 JRT_END
742
743 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
744 JavaThread* thread, oopDesc* obj))
745
746 // Produce the error message first because note_trap can safepoint
747 ResourceMark rm(thread);
748 char* message = SharedRuntime::generate_class_cast_message(
749 thread, obj->klass());
750
751 if (ProfileTraps) {
752 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
753 }
754
755 // create exception
756 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
757 JRT_END
758
759 // exception_handler_for_exception(...) returns the continuation address,
760 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
761 // The exception oop is returned to make sure it is preserved over GC (it
762 // is only on the stack if the exception was thrown explicitly via athrow).
763 // During this operation, the expression stack contains the values for the
764 // bci where the exception happened. If the exception was propagated back
765 // from a call, the expression stack contains the values for the bci at the
766 // invoke w/o arguments (i.e., as if one were inside the call).
767 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
768
769 LastFrameAccessor last_frame(thread);
770 Handle h_exception(thread, exception);
771 methodHandle h_method (thread, last_frame.method());
772 constantPoolHandle h_constants(thread, h_method->constants());
773 bool should_repeat;
774 int handler_bci;
775 int current_bci = last_frame.bci();
776
777 if (thread->frames_to_pop_failed_realloc() > 0) {
778 // Allocation of scalar replaced object used in this frame
779 // failed. Unconditionally pop the frame.
780 thread->dec_frames_to_pop_failed_realloc();
781 thread->set_vm_result(h_exception());
782 // If the method is synchronized we already unlocked the monitor
783 // during deoptimization so the interpreter needs to skip it when
784 // the frame is popped.
785 thread->set_do_not_unlock_if_synchronized(true);
786 #ifdef CC_INTERP
787 return (address) -1;
788 #else
789 return Interpreter::remove_activation_entry();
790 #endif
791 }
792
793 // Need to do this check first since when _do_not_unlock_if_synchronized
794 // is set, we don't want to trigger any classloading which may make calls
795 // into java, or surprisingly find a matching exception handler for bci 0
796 // since at this moment the method hasn't been "officially" entered yet.
797 if (thread->do_not_unlock_if_synchronized()) {
798 ResourceMark rm;
799 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
800 thread->set_vm_result(exception);
801 #ifdef CC_INTERP
802 return (address) -1;
803 #else
804 return Interpreter::remove_activation_entry();
805 #endif
806 }
807
808 do {
809 should_repeat = false;
810
811 // assertions
812 #ifdef ASSERT
813 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
814 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
815 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
816 if (ExitVMOnVerifyError) vm_exit(-1);
817 ShouldNotReachHere();
818 }
819 #endif
820
821 // tracing
822 if (log_is_enabled(Info, exceptions)) {
823 ResourceMark rm(thread);
824 stringStream tempst;
825 tempst.print("interpreter method <%s>\n"
826 " at bci %d for thread " INTPTR_FORMAT " (%s)",
827 h_method->print_value_string(), current_bci, p2i(thread), thread->name());
828 Exceptions::log_exception(h_exception, tempst.as_string());
829 }
830 // Don't go paging in something which won't be used.
831 // else if (extable->length() == 0) {
832 // // disabled for now - interpreter is not using shortcut yet
833 // // (shortcut is not to call runtime if we have no exception handlers)
834 // // warning("performance bug: should not call runtime if method has no exception handlers");
835 // }
836 // for AbortVMOnException flag
837 Exceptions::debug_check_abort(h_exception);
838
839 // exception handler lookup
840 Klass* klass = h_exception->klass();
841 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
842 if (HAS_PENDING_EXCEPTION) {
843 // We threw an exception while trying to find the exception handler.
844 // Transfer the new exception to the exception handle which will
845 // be set into thread local storage, and do another lookup for an
846 // exception handler for this exception, this time starting at the
847 // BCI of the exception handler which caused the exception to be
848 // thrown (bug 4307310).
849 h_exception = Handle(THREAD, PENDING_EXCEPTION);
850 CLEAR_PENDING_EXCEPTION;
851 if (handler_bci >= 0) {
852 current_bci = handler_bci;
853 should_repeat = true;
854 }
855 }
856 } while (should_repeat == true);
857
858 #if INCLUDE_JVMCI
859 if (EnableJVMCI && h_method->method_data() != NULL) {
860 ResourceMark rm(thread);
861 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
862 if (pdata != NULL && pdata->is_BitData()) {
863 BitData* bit_data = (BitData*) pdata;
864 bit_data->set_exception_seen();
865 }
866 }
867 #endif
868
869 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
870 // time throw or a stack unwinding throw and accordingly notify the debugger
871 if (JvmtiExport::can_post_on_exceptions()) {
872 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
873 }
874
875 #ifdef CC_INTERP
876 address continuation = (address)(intptr_t) handler_bci;
877 #else
878 address continuation = NULL;
879 #endif
880 address handler_pc = NULL;
881 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
882 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
883 // handler in this method, or (b) after a stack overflow there is not yet
884 // enough stack space available to reprotect the stack.
885 #ifndef CC_INTERP
886 continuation = Interpreter::remove_activation_entry();
887 #endif
888 #if COMPILER2_OR_JVMCI
889 // Count this for compilation purposes
890 h_method->interpreter_throwout_increment(THREAD);
891 #endif
892 } else {
893 // handler in this method => change bci/bcp to handler bci/bcp and continue there
894 handler_pc = h_method->code_base() + handler_bci;
895 #ifndef CC_INTERP
896 set_bcp_and_mdp(handler_pc, thread);
897 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
898 #endif
899 }
900 // notify debugger of an exception catch
901 // (this is good for exceptions caught in native methods as well)
902 if (JvmtiExport::can_post_on_exceptions()) {
903 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
904 }
905
906 thread->set_vm_result(h_exception());
907 return continuation;
908 JRT_END
909
910
911 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
912 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
913 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
914 JRT_END
915
916
917 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
918 THROW(vmSymbols::java_lang_AbstractMethodError());
919 JRT_END
920
921 // This method is called from the "abstract_entry" of the interpreter.
922 // At that point, the arguments have already been removed from the stack
923 // and therefore we don't have the receiver object at our fingertips. (Though,
924 // on some platforms the receiver still resides in a register...). Thus,
925 // we have no choice but print an error message not containing the receiver
926 // type.
927 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* thread,
928 Method* missingMethod))
929 ResourceMark rm(thread);
930 assert(missingMethod != NULL, "sanity");
931 methodHandle m(thread, missingMethod);
932 LinkResolver::throw_abstract_method_error(m, THREAD);
933 JRT_END
934
935 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* thread,
936 Klass* recvKlass,
937 Method* missingMethod))
938 ResourceMark rm(thread);
939 methodHandle mh = methodHandle(thread, missingMethod);
940 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
941 JRT_END
942
943
944 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
945 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
946 JRT_END
947
948 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* thread,
949 Klass* recvKlass,
950 Klass* interfaceKlass))
951 ResourceMark rm(thread);
952 char buf[1000];
953 buf[0] = '\0';
954 jio_snprintf(buf, sizeof(buf),
955 "Class %s does not implement the requested interface %s",
956 recvKlass ? recvKlass->external_name() : "NULL",
957 interfaceKlass ? interfaceKlass->external_name() : "NULL");
958 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
959 JRT_END
960
961 //------------------------------------------------------------------------------------------------------------------------
962 // Fields
963 //
964
965 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
966 Thread* THREAD = thread;
967 // resolve field
968 fieldDescriptor info;
969 LastFrameAccessor last_frame(thread);
970 constantPoolHandle pool(thread, last_frame.method()->constants());
971 methodHandle m(thread, last_frame.method());
972 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
973 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
974 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
975 bool is_value = bytecode == Bytecodes::_withfield;
976
977 {
978 JvmtiHideSingleStepping jhss(thread);
979 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
980 m, bytecode, CHECK);
981 } // end JvmtiHideSingleStepping
982
983 // check if link resolution caused cpCache to be updated
984 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
985 if (cp_cache_entry->is_resolved(bytecode)) return;
986
987 // compute auxiliary field attributes
988 TosState state = as_TosState(info.field_type());
989
990 // Resolution of put instructions on final fields is delayed. That is required so that
991 // exceptions are thrown at the correct place (when the instruction is actually invoked).
992 // If we do not resolve an instruction in the current pass, leaving the put_code
993 // set to zero will cause the next put instruction to the same field to reresolve.
994
995 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
996 // to final instance fields with updates originating from a method different than <init>)
997 // is inhibited. A putfield instruction targeting an instance final field must throw
998 // an IllegalAccessError if the instruction is not in an instance
999 // initializer method <init>. If resolution were not inhibited, a putfield
1000 // in an initializer method could be resolved in the initializer. Subsequent
1001 // putfield instructions to the same field would then use cached information.
1002 // As a result, those instructions would not pass through the VM. That is,
1003 // checks in resolve_field_access() would not be executed for those instructions
1004 // and the required IllegalAccessError would not be thrown.
1005 //
1006 // Also, we need to delay resolving getstatic and putstatic instructions until the
1007 // class is initialized. This is required so that access to the static
1008 // field will call the initialization function every time until the class
1009 // is completely initialized ala. in 2.17.5 in JVM Specification.
1010 InstanceKlass* klass = info.field_holder();
1011 bool uninitialized_static = is_static && !klass->is_initialized();
1012 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
1013 info.has_initialized_final_update();
1014 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
1015
1016 Bytecodes::Code get_code = (Bytecodes::Code)0;
1017 Bytecodes::Code put_code = (Bytecodes::Code)0;
1018 if (!uninitialized_static) {
1019 if (is_static) {
1020 get_code = Bytecodes::_getstatic;
1021 } else {
1022 get_code = Bytecodes::_getfield;
1023 }
1024 if (is_put && is_value) {
1025 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
1026 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
1027 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
1028 }
1029 }
1030
1031 cp_cache_entry->set_field(
1032 get_code,
1033 put_code,
1034 info.field_holder(),
1035 info.index(),
1036 info.offset(),
1037 state,
1038 info.access_flags().is_final(),
1039 info.access_flags().is_volatile(),
1040 info.is_flattened(),
1041 info.is_flattenable(),
1042 pool->pool_holder()
1043 );
1044 }
1045
1046
1047 //------------------------------------------------------------------------------------------------------------------------
1048 // Synchronization
1049 //
1050 // The interpreter's synchronization code is factored out so that it can
1051 // be shared by method invocation and synchronized blocks.
1052 //%note synchronization_3
1053
1054 //%note monitor_1
1055 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
1056 #ifdef ASSERT
1057 thread->last_frame().interpreter_frame_verify_monitor(elem);
1058 #endif
1059 if (PrintBiasedLockingStatistics) {
1060 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
1061 }
1062 Handle h_obj(thread, elem->obj());
1063 assert(Universe::heap()->is_in_or_null(h_obj()),
1064 "must be NULL or an object");
1065 ObjectSynchronizer::enter(h_obj, elem->lock(), CHECK);
1066 assert(Universe::heap()->is_in_or_null(elem->obj()),
1067 "must be NULL or an object");
1068 #ifdef ASSERT
1069 thread->last_frame().interpreter_frame_verify_monitor(elem);
1070 #endif
1071 JRT_END
1072
1073
1074 //%note monitor_1
1075 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
1076 #ifdef ASSERT
1077 thread->last_frame().interpreter_frame_verify_monitor(elem);
1078 #endif
1079 Handle h_obj(thread, elem->obj());
1080 assert(Universe::heap()->is_in_or_null(h_obj()),
1081 "must be NULL or an object");
1082 if (elem == NULL || h_obj()->is_unlocked()) {
1083 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1084 }
1085 ObjectSynchronizer::exit(h_obj(), elem->lock(), thread);
1086 // Free entry. This must be done here, since a pending exception might be installed on
1087 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
1088 elem->set_obj(NULL);
1089 #ifdef ASSERT
1090 thread->last_frame().interpreter_frame_verify_monitor(elem);
1091 #endif
1092 JRT_END
1093
1094
1095 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
1096 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1097 JRT_END
1098
1099
1100 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
1101 // Returns an illegal exception to install into the current thread. The
1102 // pending_exception flag is cleared so normal exception handling does not
1103 // trigger. Any current installed exception will be overwritten. This
1104 // method will be called during an exception unwind.
1105
1106 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1107 Handle exception(thread, thread->vm_result());
1108 assert(exception() != NULL, "vm result should be set");
1109 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1110 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
1111 exception = get_preinitialized_exception(
1112 SystemDictionary::IllegalMonitorStateException_klass(),
1113 CATCH);
1114 }
1115 thread->set_vm_result(exception());
1116 JRT_END
1117
1118
1119 //------------------------------------------------------------------------------------------------------------------------
1120 // Invokes
1121
1122 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
1123 return method->orig_bytecode_at(method->bci_from(bcp));
1124 JRT_END
1125
1126 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
1127 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1128 JRT_END
1129
1130 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
1131 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
1132 JRT_END
1133
1134 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
1135 Thread* THREAD = thread;
1136 LastFrameAccessor last_frame(thread);
1137 // extract receiver from the outgoing argument list if necessary
1138 Handle receiver(thread, NULL);
1139 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1140 bytecode == Bytecodes::_invokespecial) {
1141 ResourceMark rm(thread);
1142 methodHandle m (thread, last_frame.method());
1143 Bytecode_invoke call(m, last_frame.bci());
1144 Symbol* signature = call.signature();
1145 receiver = Handle(thread, last_frame.callee_receiver(signature));
1146
1147 assert(Universe::heap()->is_in_or_null(receiver()),
1148 "sanity check");
1149 assert(receiver.is_null() ||
1150 !Universe::heap()->is_in(receiver->klass()),
1151 "sanity check");
1152 }
1153
1154 // resolve method
1155 CallInfo info;
1156 constantPoolHandle pool(thread, last_frame.method()->constants());
1157
1158 {
1159 JvmtiHideSingleStepping jhss(thread);
1160 LinkResolver::resolve_invoke(info, receiver, pool,
1161 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1162 CHECK);
1163 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
1164 int retry_count = 0;
1165 while (info.resolved_method()->is_old()) {
1166 // It is very unlikely that method is redefined more than 100 times
1167 // in the middle of resolve. If it is looping here more than 100 times
1168 // means then there could be a bug here.
1169 guarantee((retry_count++ < 100),
1170 "Could not resolve to latest version of redefined method");
1171 // method is redefined in the middle of resolve so re-try.
1172 LinkResolver::resolve_invoke(info, receiver, pool,
1173 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1174 CHECK);
1175 }
1176 }
1177 } // end JvmtiHideSingleStepping
1178
1179 // check if link resolution caused cpCache to be updated
1180 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1181 if (cp_cache_entry->is_resolved(bytecode)) return;
1182
1183 #ifdef ASSERT
1184 if (bytecode == Bytecodes::_invokeinterface) {
1185 if (info.resolved_method()->method_holder() ==
1186 SystemDictionary::Object_klass()) {
1187 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1188 // (see also CallInfo::set_interface for details)
1189 assert(info.call_kind() == CallInfo::vtable_call ||
1190 info.call_kind() == CallInfo::direct_call, "");
1191 methodHandle rm = info.resolved_method();
1192 assert(rm->is_final() || info.has_vtable_index(),
1193 "should have been set already");
1194 } else if (!info.resolved_method()->has_itable_index()) {
1195 // Resolved something like CharSequence.toString. Use vtable not itable.
1196 assert(info.call_kind() != CallInfo::itable_call, "");
1197 } else {
1198 // Setup itable entry
1199 assert(info.call_kind() == CallInfo::itable_call, "");
1200 int index = info.resolved_method()->itable_index();
1201 assert(info.itable_index() == index, "");
1202 }
1203 } else if (bytecode == Bytecodes::_invokespecial) {
1204 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1205 } else {
1206 assert(info.call_kind() == CallInfo::direct_call ||
1207 info.call_kind() == CallInfo::vtable_call, "");
1208 }
1209 #endif
1210 // Get sender or sender's unsafe_anonymous_host, and only set cpCache entry to resolved if
1211 // it is not an interface. The receiver for invokespecial calls within interface
1212 // methods must be checked for every call.
1213 InstanceKlass* sender = pool->pool_holder();
1214 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
1215
1216 switch (info.call_kind()) {
1217 case CallInfo::direct_call:
1218 cp_cache_entry->set_direct_call(
1219 bytecode,
1220 info.resolved_method(),
1221 sender->is_interface());
1222 break;
1223 case CallInfo::vtable_call:
1224 cp_cache_entry->set_vtable_call(
1225 bytecode,
1226 info.resolved_method(),
1227 info.vtable_index());
1228 break;
1229 case CallInfo::itable_call:
1230 cp_cache_entry->set_itable_call(
1231 bytecode,
1232 info.resolved_klass(),
1233 info.resolved_method(),
1234 info.itable_index());
1235 break;
1236 default: ShouldNotReachHere();
1237 }
1238 }
1239
1240
1241 // First time execution: Resolve symbols, create a permanent MethodType object.
1242 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1243 Thread* THREAD = thread;
1244 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1245 LastFrameAccessor last_frame(thread);
1246
1247 // resolve method
1248 CallInfo info;
1249 constantPoolHandle pool(thread, last_frame.method()->constants());
1250 {
1251 JvmtiHideSingleStepping jhss(thread);
1252 LinkResolver::resolve_invoke(info, Handle(), pool,
1253 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1254 CHECK);
1255 } // end JvmtiHideSingleStepping
1256
1257 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1258 cp_cache_entry->set_method_handle(pool, info);
1259 }
1260
1261 // First time execution: Resolve symbols, create a permanent CallSite object.
1262 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1263 Thread* THREAD = thread;
1264 LastFrameAccessor last_frame(thread);
1265 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1266
1267 // resolve method
1268 CallInfo info;
1269 constantPoolHandle pool(thread, last_frame.method()->constants());
1270 int index = last_frame.get_index_u4(bytecode);
1271 {
1272 JvmtiHideSingleStepping jhss(thread);
1273 LinkResolver::resolve_invoke(info, Handle(), pool,
1274 index, bytecode, CHECK);
1275 } // end JvmtiHideSingleStepping
1276
1277 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1278 cp_cache_entry->set_dynamic_call(pool, info);
1279 }
1280
1281 // This function is the interface to the assembly code. It returns the resolved
1282 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1283 // This function will check for redefinition!
1284 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1285 switch (bytecode) {
1286 case Bytecodes::_getstatic:
1287 case Bytecodes::_putstatic:
1288 case Bytecodes::_getfield:
1289 case Bytecodes::_putfield:
1290 case Bytecodes::_withfield:
1291 resolve_get_put(thread, bytecode);
1292 break;
1293 case Bytecodes::_invokevirtual:
1294 case Bytecodes::_invokespecial:
1295 case Bytecodes::_invokestatic:
1296 case Bytecodes::_invokeinterface:
1297 resolve_invoke(thread, bytecode);
1298 break;
1299 case Bytecodes::_invokehandle:
1300 resolve_invokehandle(thread);
1301 break;
1302 case Bytecodes::_invokedynamic:
1303 resolve_invokedynamic(thread);
1304 break;
1305 default:
1306 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1307 break;
1308 }
1309 }
1310 JRT_END
1311
1312 //------------------------------------------------------------------------------------------------------------------------
1313 // Miscellaneous
1314
1315
1316 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1317 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1318 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1319 if (branch_bcp != NULL && nm != NULL) {
1320 // This was a successful request for an OSR nmethod. Because
1321 // frequency_counter_overflow_inner ends with a safepoint check,
1322 // nm could have been unloaded so look it up again. It's unsafe
1323 // to examine nm directly since it might have been freed and used
1324 // for something else.
1325 LastFrameAccessor last_frame(thread);
1326 Method* method = last_frame.method();
1327 int bci = method->bci_from(last_frame.bcp());
1328 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1329 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1330 if (nm != NULL && bs_nm != NULL) {
1331 // in case the transition passed a safepoint we need to barrier this again
1332 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1333 nm = NULL;
1334 }
1335 }
1336 }
1337 if (nm != NULL && thread->is_interp_only_mode()) {
1338 // Normally we never get an nm if is_interp_only_mode() is true, because
1339 // policy()->event has a check for this and won't compile the method when
1340 // true. However, it's possible for is_interp_only_mode() to become true
1341 // during the compilation. We don't want to return the nm in that case
1342 // because we want to continue to execute interpreted.
1343 nm = NULL;
1344 }
1345 #ifndef PRODUCT
1346 if (TraceOnStackReplacement) {
1347 if (nm != NULL) {
1348 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1349 nm->print();
1350 }
1351 }
1352 #endif
1353 return nm;
1354 }
1355
1356 JRT_ENTRY(nmethod*,
1357 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1358 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1359 // flag, in case this method triggers classloading which will call into Java.
1360 UnlockFlagSaver fs(thread);
1361
1362 LastFrameAccessor last_frame(thread);
1363 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1364 methodHandle method(thread, last_frame.method());
1365 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1366 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1367
1368 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1369 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1370 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1371
1372 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1373 if (osr_nm != NULL && bs_nm != NULL) {
1374 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1375 osr_nm = NULL;
1376 }
1377 }
1378
1379 if (osr_nm != NULL) {
1380 // We may need to do on-stack replacement which requires that no
1381 // monitors in the activation are biased because their
1382 // BasicObjectLocks will need to migrate during OSR. Force
1383 // unbiasing of all monitors in the activation now (even though
1384 // the OSR nmethod might be invalidated) because we don't have a
1385 // safepoint opportunity later once the migration begins.
1386 if (UseBiasedLocking) {
1387 ResourceMark rm;
1388 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1389 for( BasicObjectLock *kptr = last_frame.monitor_end();
1390 kptr < last_frame.monitor_begin();
1391 kptr = last_frame.next_monitor(kptr) ) {
1392 if( kptr->obj() != NULL ) {
1393 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1394 }
1395 }
1396 BiasedLocking::revoke(objects_to_revoke, thread);
1397 }
1398 }
1399 return osr_nm;
1400 JRT_END
1401
1402 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1403 assert(ProfileInterpreter, "must be profiling interpreter");
1404 int bci = method->bci_from(cur_bcp);
1405 MethodData* mdo = method->method_data();
1406 if (mdo == NULL) return 0;
1407 return mdo->bci_to_di(bci);
1408 JRT_END
1409
1410 JRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1411 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1412 // flag, in case this method triggers classloading which will call into Java.
1413 UnlockFlagSaver fs(thread);
1414
1415 assert(ProfileInterpreter, "must be profiling interpreter");
1416 LastFrameAccessor last_frame(thread);
1417 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1418 methodHandle method(thread, last_frame.method());
1419 Method::build_interpreter_method_data(method, THREAD);
1420 if (HAS_PENDING_EXCEPTION) {
1421 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1422 CLEAR_PENDING_EXCEPTION;
1423 // and fall through...
1424 }
1425 JRT_END
1426
1427
1428 #ifdef ASSERT
1429 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1430 assert(ProfileInterpreter, "must be profiling interpreter");
1431
1432 MethodData* mdo = method->method_data();
1433 assert(mdo != NULL, "must not be null");
1434
1435 int bci = method->bci_from(bcp);
1436
1437 address mdp2 = mdo->bci_to_dp(bci);
1438 if (mdp != mdp2) {
1439 ResourceMark rm;
1440 ResetNoHandleMark rnm; // In a LEAF entry.
1441 HandleMark hm;
1442 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1443 int current_di = mdo->dp_to_di(mdp);
1444 int expected_di = mdo->dp_to_di(mdp2);
1445 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1446 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1447 int approx_bci = -1;
1448 if (current_di >= 0) {
1449 approx_bci = mdo->data_at(current_di)->bci();
1450 }
1451 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1452 mdo->print_on(tty);
1453 method->print_codes();
1454 }
1455 assert(mdp == mdp2, "wrong mdp");
1456 JRT_END
1457 #endif // ASSERT
1458
1459 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1460 assert(ProfileInterpreter, "must be profiling interpreter");
1461 ResourceMark rm(thread);
1462 HandleMark hm(thread);
1463 LastFrameAccessor last_frame(thread);
1464 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1465 MethodData* h_mdo = last_frame.method()->method_data();
1466
1467 // Grab a lock to ensure atomic access to setting the return bci and
1468 // the displacement. This can block and GC, invalidating all naked oops.
1469 MutexLocker ml(RetData_lock);
1470
1471 // ProfileData is essentially a wrapper around a derived oop, so we
1472 // need to take the lock before making any ProfileData structures.
1473 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1474 guarantee(data != NULL, "profile data must be valid");
1475 RetData* rdata = data->as_RetData();
1476 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1477 last_frame.set_mdp(new_mdp);
1478 JRT_END
1479
1480 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1481 MethodCounters* mcs = Method::build_method_counters(m, thread);
1482 if (HAS_PENDING_EXCEPTION) {
1483 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1484 CLEAR_PENDING_EXCEPTION;
1485 }
1486 return mcs;
1487 JRT_END
1488
1489
1490 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1491 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1492 // stack traversal automatically takes care of preserving arguments for invoke, so
1493 // this is no longer needed.
1494
1495 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1496 // if this is called during a safepoint
1497
1498 if (JvmtiExport::should_post_single_step()) {
1499 // We are called during regular safepoints and when the VM is
1500 // single stepping. If any thread is marked for single stepping,
1501 // then we may have JVMTI work to do.
1502 LastFrameAccessor last_frame(thread);
1503 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1504 }
1505 JRT_END
1506
1507 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1508 ConstantPoolCacheEntry *cp_entry))
1509
1510 // check the access_flags for the field in the klass
1511
1512 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1513 int index = cp_entry->field_index();
1514 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1515
1516 bool is_static = (obj == NULL);
1517 HandleMark hm(thread);
1518
1519 Handle h_obj;
1520 if (!is_static) {
1521 // non-static field accessors have an object, but we need a handle
1522 h_obj = Handle(thread, obj);
1523 }
1524 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1525 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1526 LastFrameAccessor last_frame(thread);
1527 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1528 JRT_END
1529
1530 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1531 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1532
1533 Klass* k = cp_entry->f1_as_klass();
1534
1535 // check the access_flags for the field in the klass
1536 InstanceKlass* ik = InstanceKlass::cast(k);
1537 int index = cp_entry->field_index();
1538 // bail out if field modifications are not watched
1539 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1540
1541 char sig_type = '\0';
1542
1543 switch(cp_entry->flag_state()) {
1544 case btos: sig_type = 'B'; break;
1545 case ztos: sig_type = 'Z'; break;
1546 case ctos: sig_type = 'C'; break;
1547 case stos: sig_type = 'S'; break;
1548 case itos: sig_type = 'I'; break;
1549 case ftos: sig_type = 'F'; break;
1550 case atos: sig_type = 'L'; break;
1551 case ltos: sig_type = 'J'; break;
1552 case dtos: sig_type = 'D'; break;
1553 default: ShouldNotReachHere(); return;
1554 }
1555
1556 // Both Q-signatures and L-signatures are mapped to atos
1557 if (cp_entry->flag_state() == atos && ik->field_signature(index)->is_Q_signature()) {
1558 sig_type = 'Q';
1559 }
1560
1561 bool is_static = (obj == NULL);
1562
1563 HandleMark hm(thread);
1564 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1565 jvalue fvalue;
1566 #ifdef _LP64
1567 fvalue = *value;
1568 #else
1569 // Long/double values are stored unaligned and also noncontiguously with
1570 // tagged stacks. We can't just do a simple assignment even in the non-
1571 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1572 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1573 // We assume that the two halves of longs/doubles are stored in interpreter
1574 // stack slots in platform-endian order.
1575 jlong_accessor u;
1576 jint* newval = (jint*)value;
1577 u.words[0] = newval[0];
1578 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1579 fvalue.j = u.long_value;
1580 #endif // _LP64
1581
1582 Handle h_obj;
1583 if (!is_static) {
1584 // non-static field accessors have an object, but we need a handle
1585 h_obj = Handle(thread, obj);
1586 }
1587
1588 LastFrameAccessor last_frame(thread);
1589 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1590 fid, sig_type, &fvalue);
1591 JRT_END
1592
1593 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1594 LastFrameAccessor last_frame(thread);
1595 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1596 JRT_END
1597
1598
1599 JRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1600 LastFrameAccessor last_frame(thread);
1601 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1602 JRT_END
1603
1604 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1605 {
1606 return (Interpreter::contains(pc) ? 1 : 0);
1607 }
1608 JRT_END
1609
1610
1611 // Implementation of SignatureHandlerLibrary
1612
1613 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1614 // Dummy definition (else normalization method is defined in CPU
1615 // dependant code)
1616 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1617 return fingerprint;
1618 }
1619 #endif
1620
1621 address SignatureHandlerLibrary::set_handler_blob() {
1622 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1623 if (handler_blob == NULL) {
1624 return NULL;
1625 }
1626 address handler = handler_blob->code_begin();
1627 _handler_blob = handler_blob;
1628 _handler = handler;
1629 return handler;
1630 }
1631
1632 void SignatureHandlerLibrary::initialize() {
1633 if (_fingerprints != NULL) {
1634 return;
1635 }
1636 if (set_handler_blob() == NULL) {
1637 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1638 }
1639
1640 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1641 SignatureHandlerLibrary::buffer_size);
1642 _buffer = bb->code_begin();
1643
1644 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1645 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1646 }
1647
1648 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1649 address handler = _handler;
1650 int insts_size = buffer->pure_insts_size();
1651 if (handler + insts_size > _handler_blob->code_end()) {
1652 // get a new handler blob
1653 handler = set_handler_blob();
1654 }
1655 if (handler != NULL) {
1656 memcpy(handler, buffer->insts_begin(), insts_size);
1657 pd_set_handler(handler);
1658 ICache::invalidate_range(handler, insts_size);
1659 _handler = handler + insts_size;
1660 }
1661 return handler;
1662 }
1663
1664 void SignatureHandlerLibrary::add(const methodHandle& method) {
1665 if (method->signature_handler() == NULL) {
1666 // use slow signature handler if we can't do better
1667 int handler_index = -1;
1668 // check if we can use customized (fast) signature handler
1669 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1670 // use customized signature handler
1671 MutexLocker mu(SignatureHandlerLibrary_lock);
1672 // make sure data structure is initialized
1673 initialize();
1674 // lookup method signature's fingerprint
1675 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1676 // allow CPU dependant code to optimize the fingerprints for the fast handler
1677 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1678 handler_index = _fingerprints->find(fingerprint);
1679 // create handler if necessary
1680 if (handler_index < 0) {
1681 ResourceMark rm;
1682 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1683 CodeBuffer buffer((address)(_buffer + align_offset),
1684 SignatureHandlerLibrary::buffer_size - align_offset);
1685 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1686 // copy into code heap
1687 address handler = set_handler(&buffer);
1688 if (handler == NULL) {
1689 // use slow signature handler (without memorizing it in the fingerprints)
1690 } else {
1691 // debugging suppport
1692 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1693 ttyLocker ttyl;
1694 tty->cr();
1695 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1696 _handlers->length(),
1697 (method->is_static() ? "static" : "receiver"),
1698 method->name_and_sig_as_C_string(),
1699 fingerprint,
1700 buffer.insts_size());
1701 if (buffer.insts_size() > 0) {
1702 Disassembler::decode(handler, handler + buffer.insts_size());
1703 }
1704 #ifndef PRODUCT
1705 address rh_begin = Interpreter::result_handler(method()->result_type());
1706 if (CodeCache::contains(rh_begin)) {
1707 // else it might be special platform dependent values
1708 tty->print_cr(" --- associated result handler ---");
1709 address rh_end = rh_begin;
1710 while (*(int*)rh_end != 0) {
1711 rh_end += sizeof(int);
1712 }
1713 Disassembler::decode(rh_begin, rh_end);
1714 } else {
1715 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1716 }
1717 #endif
1718 }
1719 // add handler to library
1720 _fingerprints->append(fingerprint);
1721 _handlers->append(handler);
1722 // set handler index
1723 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1724 handler_index = _fingerprints->length() - 1;
1725 }
1726 }
1727 // Set handler under SignatureHandlerLibrary_lock
1728 if (handler_index < 0) {
1729 // use generic signature handler
1730 method->set_signature_handler(Interpreter::slow_signature_handler());
1731 } else {
1732 // set handler
1733 method->set_signature_handler(_handlers->at(handler_index));
1734 }
1735 } else {
1736 DEBUG_ONLY(Thread::current()->check_possible_safepoint());
1737 // use generic signature handler
1738 method->set_signature_handler(Interpreter::slow_signature_handler());
1739 }
1740 }
1741 #ifdef ASSERT
1742 int handler_index = -1;
1743 int fingerprint_index = -2;
1744 {
1745 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1746 // in any way if accessed from multiple threads. To avoid races with another
1747 // thread which may change the arrays in the above, mutex protected block, we
1748 // have to protect this read access here with the same mutex as well!
1749 MutexLocker mu(SignatureHandlerLibrary_lock);
1750 if (_handlers != NULL) {
1751 handler_index = _handlers->find(method->signature_handler());
1752 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1753 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1754 fingerprint_index = _fingerprints->find(fingerprint);
1755 }
1756 }
1757 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1758 handler_index == fingerprint_index, "sanity check");
1759 #endif // ASSERT
1760 }
1761
1762 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1763 int handler_index = -1;
1764 // use customized signature handler
1765 MutexLocker mu(SignatureHandlerLibrary_lock);
1766 // make sure data structure is initialized
1767 initialize();
1768 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1769 handler_index = _fingerprints->find(fingerprint);
1770 // create handler if necessary
1771 if (handler_index < 0) {
1772 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1773 tty->cr();
1774 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1775 _handlers->length(),
1776 p2i(handler),
1777 fingerprint);
1778 }
1779 _fingerprints->append(fingerprint);
1780 _handlers->append(handler);
1781 } else {
1782 if (PrintSignatureHandlers) {
1783 tty->cr();
1784 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1785 _handlers->length(),
1786 fingerprint,
1787 p2i(_handlers->at(handler_index)),
1788 p2i(handler));
1789 }
1790 }
1791 }
1792
1793
1794 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1795 address SignatureHandlerLibrary::_handler = NULL;
1796 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1797 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1798 address SignatureHandlerLibrary::_buffer = NULL;
1799
1800
1801 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1802 methodHandle m(thread, method);
1803 assert(m->is_native(), "sanity check");
1804 // lookup native function entry point if it doesn't exist
1805 bool in_base_library;
1806 if (!m->has_native_function()) {
1807 NativeLookup::lookup(m, in_base_library, CHECK);
1808 }
1809 // make sure signature handler is installed
1810 SignatureHandlerLibrary::add(m);
1811 // The interpreter entry point checks the signature handler first,
1812 // before trying to fetch the native entry point and klass mirror.
1813 // We must set the signature handler last, so that multiple processors
1814 // preparing the same method will be sure to see non-null entry & mirror.
1815 JRT_END
1816
1817 #if defined(IA32) || defined(AMD64) || defined(ARM)
1818 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1819 if (src_address == dest_address) {
1820 return;
1821 }
1822 ResetNoHandleMark rnm; // In a LEAF entry.
1823 HandleMark hm;
1824 ResourceMark rm;
1825 LastFrameAccessor last_frame(thread);
1826 assert(last_frame.is_interpreted_frame(), "");
1827 jint bci = last_frame.bci();
1828 methodHandle mh(thread, last_frame.method());
1829 Bytecode_invoke invoke(mh, bci);
1830 ArgumentSizeComputer asc(invoke.signature());
1831 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1832 Copy::conjoint_jbytes(src_address, dest_address,
1833 size_of_arguments * Interpreter::stackElementSize);
1834 JRT_END
1835 #endif
1836
1837 #if INCLUDE_JVMTI
1838 // This is a support of the JVMTI PopFrame interface.
1839 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1840 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1841 // The member_name argument is a saved reference (in local#0) to the member_name.
1842 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1843 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1844 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1845 Method* method, address bcp))
1846 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1847 if (code != Bytecodes::_invokestatic) {
1848 return;
1849 }
1850 ConstantPool* cpool = method->constants();
1851 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1852 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1853 Symbol* mname = cpool->name_ref_at(cp_index);
1854
1855 if (MethodHandles::has_member_arg(cname, mname)) {
1856 oop member_name_oop = (oop) member_name;
1857 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1858 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1859 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1860 }
1861 thread->set_vm_result(member_name_oop);
1862 } else {
1863 thread->set_vm_result(NULL);
1864 }
1865 JRT_END
1866 #endif // INCLUDE_JVMTI
1867
1868 #ifndef PRODUCT
1869 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1870 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1871 // The generated code still uses call_VM because that will set up the frame pointer for
1872 // bcp and method.
1873 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1874 LastFrameAccessor last_frame(thread);
1875 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1876 methodHandle mh(thread, last_frame.method());
1877 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1878 return preserve_this_value;
1879 JRT_END
1880 #endif // !PRODUCT