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