1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/disassembler.hpp"
32 #include "gc/shared/collectedHeap.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "interpreter/interpreterRuntime.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "interpreter/templateTable.hpp"
37 #include "logging/log.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "memory/vtBuffer.hpp"
42 #include "oops/constantPool.hpp"
43 #include "oops/instanceKlass.hpp"
44 #include "oops/methodData.hpp"
45 #include "oops/objArrayKlass.hpp"
46 #include "oops/objArrayOop.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/symbol.hpp"
49 #include "oops/valueKlass.hpp"
50 #include "oops/valueArrayKlass.hpp"
51 #include "oops/valueArrayOop.hpp"
52 #include "prims/jvmtiExport.hpp"
53 #include "prims/nativeLookup.hpp"
54 #include "runtime/atomic.hpp"
55 #include "runtime/biasedLocking.hpp"
56 #include "runtime/compilationPolicy.hpp"
57 #include "runtime/deoptimization.hpp"
58 #include "runtime/fieldDescriptor.hpp"
59 #include "runtime/handles.inline.hpp"
60 #include "runtime/icache.hpp"
61 #include "runtime/interfaceSupport.hpp"
62 #include "runtime/java.hpp"
63 #include "runtime/jfieldIDWorkaround.hpp"
64 #include "runtime/osThread.hpp"
65 #include "runtime/sharedRuntime.hpp"
66 #include "runtime/stubRoutines.hpp"
67 #include "runtime/synchronizer.hpp"
68 #include "runtime/threadCritical.hpp"
69 #include "utilities/events.hpp"
70 #include "utilities/globalDefinitions.hpp"
71 #ifdef COMPILER2
72 #include "opto/runtime.hpp"
73 #endif
74
75 class UnlockFlagSaver {
76 private:
77 JavaThread* _thread;
78 bool _do_not_unlock;
79 public:
80 UnlockFlagSaver(JavaThread* t) {
81 _thread = t;
82 _do_not_unlock = t->do_not_unlock_if_synchronized();
83 t->set_do_not_unlock_if_synchronized(false);
84 }
85 ~UnlockFlagSaver() {
86 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
87 }
88 };
89
90 //------------------------------------------------------------------------------------------------------------------------
91 // State accessors
92
93 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
94 last_frame(thread).interpreter_frame_set_bcp(bcp);
95 if (ProfileInterpreter) {
96 // ProfileTraps uses MDOs independently of ProfileInterpreter.
97 // That is why we must check both ProfileInterpreter and mdo != NULL.
98 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
99 if (mdo != NULL) {
100 NEEDS_CLEANUP;
101 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
102 }
103 }
104 }
105
106 //------------------------------------------------------------------------------------------------------------------------
107 // Constants
108
109
110 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
111 // access constant pool
112 ConstantPool* pool = method(thread)->constants();
113 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
114 constantTag tag = pool->tag_at(index);
115
116 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
117 Klass* klass = pool->klass_at(index, CHECK);
118 oop java_class = klass->java_mirror();
119 thread->set_vm_result(java_class);
120 IRT_END
121
122 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
123 assert(bytecode == Bytecodes::_fast_aldc ||
124 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
125 ResourceMark rm(thread);
126 methodHandle m (thread, method(thread));
127 Bytecode_loadconstant ldc(m, bci(thread));
128 oop result = ldc.resolve_constant(CHECK);
129 #ifdef ASSERT
130 {
131 // The bytecode wrappers aren't GC-safe so construct a new one
132 Bytecode_loadconstant ldc2(m, bci(thread));
133 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
134 assert(result == coop, "expected result for assembly code");
135 }
136 #endif
137 thread->set_vm_result(result);
138 }
139 IRT_END
140
141
142 //------------------------------------------------------------------------------------------------------------------------
143 // Allocation
144
145 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
146 Klass* k = pool->klass_at(index, CHECK);
147 InstanceKlass* klass = InstanceKlass::cast(k);
148
149 // Make sure we are not instantiating an abstract klass
150 klass->check_valid_for_instantiation(true, CHECK);
151
152 // Make sure klass is initialized
153 klass->initialize(CHECK);
154
155 // At this point the class may not be fully initialized
156 // because of recursive initialization. If it is fully
157 // initialized & has_finalized is not set, we rewrite
158 // it into its fast version (Note: no locking is needed
159 // here since this is an atomic byte write and can be
160 // done more than once).
161 //
162 // Note: In case of classes with has_finalized we don't
163 // rewrite since that saves us an extra check in
164 // the fast version which then would call the
165 // slow version anyway (and do a call back into
166 // Java).
167 // If we have a breakpoint, then we don't rewrite
168 // because the _breakpoint bytecode would be lost.
169 oop obj = klass->allocate_instance(CHECK);
170 thread->set_vm_result(obj);
171 IRT_END
172
173 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) {
174 switch (type) {
175 case T_BOOLEAN:
176 instance()->bool_field_put(offset, (jboolean)*((int*)addr));
177 break;
178 case T_CHAR:
179 instance()->char_field_put(offset, (jchar) *((int*)addr));
180 break;
181 case T_FLOAT:
182 instance()->float_field_put(offset, (jfloat)*((float*)addr));
183 break;
184 case T_DOUBLE:
185 instance()->double_field_put(offset, (jdouble)*((double*)addr));
186 break;
187 case T_BYTE:
188 instance()->byte_field_put(offset, (jbyte)*((int*)addr));
189 break;
190 case T_SHORT:
191 instance()->short_field_put(offset, (jshort)*((int*)addr));
192 break;
193 case T_INT:
194 instance()->int_field_put(offset, (jint)*((int*)addr));
195 break;
196 case T_LONG:
197 instance()->long_field_put(offset, (jlong)*((long long*)addr));
198 break;
199 case T_OBJECT:
200 case T_ARRAY:
201 case T_VALUETYPE:
202 fatal("Should not be handled with this method");
203 break;
204 default:
205 fatal("Unsupported BasicType");
206 }
207 }
208
209 IRT_ENTRY(void, InterpreterRuntime::vdefault(JavaThread* thread, ConstantPool* pool, int index))
210 // Getting the ValueKlass
211 Klass* k = pool->klass_at(index, CHECK);
212 assert(k->is_value(), "vdefault argument must be the value type class");
213 ValueKlass* vklass = ValueKlass::cast(k);
214
215 vklass->initialize(THREAD);
216
217 // Creating value
218 bool in_heap;
219 instanceOop value = vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
220 Handle value_h = Handle(THREAD, value);
221
222 thread->set_vm_result(value_h());
223 IRT_END
224
225 IRT_ENTRY(int, InterpreterRuntime::vwithfield(JavaThread* thread, ConstantPoolCache* cp_cache))
226 // Getting the ValueKlass
227 int index = ConstantPool::decode_cpcache_index(get_index_u2_cpcache(thread, Bytecodes::_vwithfield));
228 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
229 assert(cp_entry->is_resolved(Bytecodes::_vwithfield), "Should have been resolved");
230 Klass* klass = cp_entry->f1_as_klass();
231 assert(klass->is_value(), "vwithfield only applies to value types");
232 ValueKlass* vklass = ValueKlass::cast(klass);
233
234 // Getting Field information
235 int offset = cp_entry->f2_as_index();
236 fieldDescriptor fd;
237 vklass->find_field_from_offset(offset, false, &fd);
238 Symbol* field_signature = fd.signature();
239 ResourceMark rm(THREAD);
240 const char* signature = (const char *) field_signature->as_utf8();
241 BasicType field_type = char2type(signature[0]);
242
243 // Getting old value
244 frame f = last_frame(thread);
245 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1;
246 int vt_offset = type2size[field_type];
247 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset);
248 assert(old_value != NULL && old_value->is_oop() && old_value->is_value(),"Verifying receiver");
249 Handle old_value_h(THREAD, old_value);
250
251 // Creating new value by copying the one passed in argument
252 bool in_heap;
253 instanceOop new_value = vklass->allocate_buffered_or_heap_instance(&in_heap,
254 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
255 Handle new_value_h = Handle(THREAD, new_value);
256 int first_offset = vklass->first_field_offset();
257 vklass->value_store(vklass->data_for_oop(old_value_h()),
258 vklass->data_for_oop(new_value_h()), in_heap, false);
259
260 // Updating the field specified in arguments
261 if (field_type == T_OBJECT || field_type == T_ARRAY) {
262 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
263 assert(aoop == NULL || (aoop->is_oop() && (!aoop->is_value())),"argument must be a reference type");
264 new_value_h()->obj_field_put(fd.offset(), aoop);
265 } else if (field_type == T_VALUETYPE) {
266 Klass* field_k = vklass->get_value_field_klass(fd.index());
267 ValueKlass* field_vk = ValueKlass::cast(field_k);
268 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
269 assert(vt_oop != NULL && vt_oop->is_oop() && vt_oop->is_value(),"argument must be a value type");
270 assert(field_vk == vt_oop->klass(), "Must match");
271 field_vk->value_store(field_vk->data_for_oop(vt_oop),
272 ((char*)(oopDesc*)new_value_h()) + fd.offset(), true, false);
273 } else {
274 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx);
275 copy_primitive_argument(addr, new_value_h, fd.offset(), field_type);
276 }
277
278 // returning result
279 thread->set_vm_result(new_value_h());
280 return (type2size[field_type] + type2size[T_VALUETYPE]) * AbstractInterpreter::stackElementSize;
281 IRT_END
282
283 IRT_ENTRY(void, InterpreterRuntime::vbox(JavaThread* thread, ConstantPool* pool, int index, oopDesc* value))
284 assert(EnableMVT, "vbox is supported only when the MVT programming model is enabled");
285 if (value == NULL) {
286 THROW(vmSymbols::java_lang_NullPointerException());
287 }
288
289 // Since the verifier is probably disabled, a few extra type check
290 Klass* target_klass = pool->klass_at(index, CHECK);
291 if (target_klass->is_value()) {
292 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vbox target is value type");
293 }
294 Klass* klass = value->klass();
295 if (!klass->is_value()) {
296 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vbox not from value type");
297 }
298 ValueKlass* vtklass = ValueKlass::cast(klass);
299 if (vtklass->get_vcc_klass() != target_klass) {
300 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vbox target is not derive value type box");
301 }
302 oop box = vtklass->box(Handle(THREAD, value),
303 InstanceKlass::cast(target_klass),
304 CHECK);
305 thread->set_vm_result(box);
306 IRT_END
307
308 IRT_ENTRY(void, InterpreterRuntime::vunbox(JavaThread* thread, ConstantPool* pool, int index, oopDesc* obj))
309 assert(EnableMVT, "vunbox is supported only when the MVT programming model is enabled");
310 if (obj == NULL) {
311 THROW(vmSymbols::java_lang_NullPointerException());
312 }
313 Klass* target_klass = pool->klass_at(index, CHECK);
314 if (!target_klass->is_value()) {
315 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vunbox target is not value type");
316 }
317 Klass* klass = obj->klass();
318 if ((!klass->is_instance_klass()) || klass->is_value()) {
319 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vunbox source is not an instance");
320 }
321 if (klass != InstanceKlass::cast(target_klass)->get_vcc_klass()) {
322 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vunbox target is not derive value type");
323 }
324 oop value = ValueKlass::cast(target_klass)->unbox(Handle(THREAD, obj),
325 InstanceKlass::cast(target_klass),
326 CHECK);
327 thread->set_vm_result(value);
328 IRT_END
329
330 IRT_ENTRY(void, InterpreterRuntime::qgetfield(JavaThread* thread, oopDesc* value, int offset))
331 Handle value_h(THREAD, value);
332 InstanceKlass* klass = InstanceKlass::cast(value->klass());
333
334 fieldDescriptor fd;
335 klass->find_field_from_offset(offset, false, &fd);
336 Klass* field_k = klass->get_value_field_klass(fd.index());
337 ValueKlass* field_vklass = ValueKlass::cast(field_k);
338 field_vklass->initialize(THREAD);
339
340 // allocate instance
341 bool in_heap;
342 instanceOop res = field_vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
343 instanceHandle res_h(THREAD, res);
344 // copy value
345 field_vklass->value_store(((char*)(oopDesc*)value_h()) + offset,
346 field_vklass->data_for_oop(res), in_heap, false);
347 thread->set_vm_result(res_h());
348 IRT_END
349
350 IRT_ENTRY(void, InterpreterRuntime::initialize_static_value_field(JavaThread* thread, oopDesc* mirror, int offset))
351 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
352 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
353 assert(mirror->obj_field(offset) == NULL,"Field must not be initialized twice");
354
355 fieldDescriptor fd;
356 klass->find_field_from_offset(offset, true, &fd);
357 Klass* field_k = klass->get_value_field_klass(fd.index());
358 ValueKlass* field_vklass = ValueKlass::cast(field_k);
359 // allocate instance, because it is going to be assigned to a static field
360 // it must not be a buffered value
361 instanceOop res = field_vklass->allocate_instance(CHECK);
362 instanceHandle res_h(THREAD, res);
363 mirror_h()->obj_field_put(offset, res_h());
364 thread->set_vm_result(res_h());
365 IRT_END
366
367 IRT_ENTRY(void, InterpreterRuntime::qputfield(JavaThread* thread, oopDesc* obj, oopDesc* value, int offset))
368 Handle value_h(THREAD, value);
369 Handle obj_h(THREAD, obj);
370 assert(!obj_h()->klass()->is_value(), "obj must be an object");
371 assert(value_h()->klass()->is_value(), "value must be an value type");
372
373 InstanceKlass* klass = InstanceKlass::cast(obj->klass());
374 fieldDescriptor fd;
375 klass->find_field_from_offset(offset, false, &fd);
376 Klass* field_k = klass->get_value_field_klass(fd.index());
377 ValueKlass* field_vklass = ValueKlass::cast(value->klass());
378 assert(field_k == field_vklass, "Field descriptor and argument must match");
379 // copy value
380 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
381 ((char*)(oopDesc*)obj_h()) + offset, true, false);
382 IRT_END
383
384 IRT_ENTRY(void, InterpreterRuntime::qputstatic(JavaThread* thread, oopDesc* value))
385 instanceHandle value_h(THREAD, (instanceOop)value);
386 assert(value_h()->is_value(), "qputstatic only deals with value arguments");
387 Method* m = last_frame(thread).interpreter_frame_method();
388 jint bci = last_frame(thread).interpreter_frame_bci();
389 assert(m->code_at(bci) == Bytecodes::_putstatic, "qputstatic is a particular case of putstatic");
390 ConstantPoolCache* cp_cache = last_frame(thread).interpreter_frame_method()->constants()->cache();
391 int index = ConstantPool::decode_cpcache_index(get_index_u2_cpcache(thread, Bytecodes::_putstatic));
392 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
393 assert(cp_entry->is_field_entry(), "Sanity check");
394
395 InstanceKlass* klass = InstanceKlass::cast(cp_entry->f1_as_klass());
396 int offset = cp_entry->f2_as_index();
397 oop mirror = klass->java_mirror();
398
399 if (Universe::heap()->is_in_reserved(value_h())) {
400 mirror->obj_field_put(offset, value_h());
401 } else {
402 // The argument is a buffered value, a copy must be created in the Java heap
403 // because a static field cannot point to a thread-local buffered value
404 fieldDescriptor fd;
405 klass->find_field_from_offset(offset, false, &fd);
406 Klass* field_k = klass->get_value_field_klass(fd.index());
407 ValueKlass* field_vklass = ValueKlass::cast(field_k);
408 assert(field_vklass == value->klass(), "Field descriptor and argument must match");
409 // allocate heap instance
410 instanceOop res = field_vklass->allocate_instance(CHECK);
411 assert(Universe::heap()->is_in_reserved(res), "Must be in the Java heap");
412 instanceHandle res_h(THREAD, res);
413 // copy value
414 field_vklass->value_store(field_vklass->data_for_oop(value_h()),
415 field_vklass->data_for_oop(res), true, false);
416 // writing static field
417 mirror->obj_field_put(offset, res_h());
418 assert(mirror->obj_field(offset) != NULL,"Sanity check");
419 }
420 IRT_END
421
422 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
423 oop obj = oopFactory::new_typeArray(type, size, CHECK);
424 thread->set_vm_result(obj);
425 IRT_END
426
427
428 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
429 Klass* klass = pool->klass_at(index, CHECK);
430 if (klass->is_value()) { // Logically creates elements, ensure klass init
431 klass->initialize(CHECK);
432 }
433 arrayOop obj = oopFactory::new_array(klass, size, CHECK);
434 thread->set_vm_result(obj);
435 IRT_END
436
437 IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
438 Klass* klass = array->klass();
439 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
440
441 if (klass->is_objArray_klass()) {
442 thread->set_vm_result(((objArrayOop) array)->obj_at(index));
443 }
444 else {
445 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
446 ValueKlass* vklass = vaklass->element_klass();
447 arrayHandle ah(THREAD, array);
448 bool in_heap;
449 instanceOop value_holder = vklass->allocate_buffered_or_heap_instance(&in_heap, CHECK);
450 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper());
451 vklass->value_store(src, vklass->data_for_oop(value_holder),
452 vaklass->element_byte_size(), in_heap, false);
453 thread->set_vm_result(value_holder);
454 }
455 IRT_END
456
457 IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, arrayOopDesc* array, int index, void* val))
458 Klass* klass = array->klass();
459 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
460
461 if (ArrayKlass::cast(klass)->element_klass() != ((oop)val)->klass()) {
462 THROW(vmSymbols::java_lang_ArrayStoreException());
463 }
464 if (klass->is_objArray_klass()) {
465 if(!Universe::heap()->is_in_reserved(val)) {
466 // A Java heap allocated copy must be made because an array cannot
467 // reference a thread-local buffered value
468 Handle val_h(THREAD, (oop)val);
469 ObjArrayKlass* aklass = ObjArrayKlass::cast(klass);
470 Klass* eklass = aklass->element_klass();
471 assert(eklass->is_value(), "Sanity check");
472 assert(eklass == ((oop)val)->klass(), "Sanity check");
473 ValueKlass* vklass = ValueKlass::cast(eklass);
474 // allocate heap instance
475 instanceOop res = vklass->allocate_instance(CHECK);
476 Handle res_h(THREAD, res);
477 // copy value
478 vklass->value_store(((char*)(oopDesc*)val_h()) + vklass->first_field_offset(),
479 ((char*)(oopDesc*)res_h()) + vklass->first_field_offset(),true, false);
480 val = res_h();
481 }
482 ((objArrayOop) array)->obj_at_put(index, (oop)val);
483 } else {
484 valueArrayOop varray = (valueArrayOop)array;
485 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
486 ValueKlass* vklass = vaklass->element_klass();
487 const int lh = vaklass->layout_helper();
488 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
489 vaklass->element_byte_size(), true, false);
490 }
491 IRT_END
492
493 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
494 // We may want to pass in more arguments - could make this slightly faster
495 ConstantPool* constants = method(thread)->constants();
496 int i = get_index_u2(thread, Bytecodes::_multianewarray);
497 Klass* klass = constants->klass_at(i, CHECK);
498 int nof_dims = number_of_dimensions(thread);
499 assert(klass->is_klass(), "not a class");
500 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
501
502 if (klass->is_value()) { // Logically creates elements, ensure klass init
503 klass->initialize(CHECK);
504 }
505
506 // We must create an array of jints to pass to multi_allocate.
507 ResourceMark rm(thread);
508 const int small_dims = 10;
509 jint dim_array[small_dims];
510 jint *dims = &dim_array[0];
511 if (nof_dims > small_dims) {
512 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
513 }
514 for (int index = 0; index < nof_dims; index++) {
515 // offset from first_size_address is addressed as local[index]
516 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
517 dims[index] = first_size_address[n];
518 }
519 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
520 thread->set_vm_result(obj);
521 IRT_END
522
523 IRT_ENTRY(void, InterpreterRuntime::recycle_vtbuffer(JavaThread* thread))
524 VTBuffer::recycle_vtbuffer(thread, last_frame(thread));
525 IRT_END
526
527 IRT_ENTRY(void, InterpreterRuntime::recycle_buffered_values(JavaThread* thread))
528 frame f = thread->last_frame();
529 assert(f.is_interpreted_frame(), "recycling can only be triggered from interpreted frames");
530 VTBuffer::recycle_vt_in_frame(thread, &f);
531 IRT_END
532
533 IRT_ENTRY(void, InterpreterRuntime::fix_frame_vt_alloc_ptr(JavaThread* thread))
534 frame f = thread->last_frame();
535 VTBuffer::fix_frame_vt_alloc_ptr(f, VTBufferChunk::chunk(thread->vt_alloc_ptr()));
536 IRT_END
537
538 IRT_ENTRY(void, InterpreterRuntime::return_value(JavaThread* thread, oopDesc* obj))
539 if (Universe::heap()->is_in_reserved(obj)) {
540 thread->set_vm_result(obj);
541 return;
542 }
543 assert(obj->klass()->is_value(), "Sanity check");
544 ValueKlass* vk = ValueKlass::cast(obj->klass());
545 RegisterMap reg_map(thread, false);
546 frame current_frame = last_frame(thread);
547 frame caller_frame = current_frame.sender(®_map);
548 if (!caller_frame.is_interpreted_frame()) {
549 // caller is not an interpreted frame, creating a new value in Java heap
550 Handle obj_h(THREAD, obj);
551 instanceOop res = vk->allocate_instance(CHECK);
552 Handle res_h(THREAD, res);
553 // copy value
554 vk->value_store(vk->data_for_oop(obj_h()),
555 vk->data_for_oop(res_h()), true, false);
556 thread->set_vm_result(res_h());
557 return;
558 } else {
559 oop dest = VTBuffer::relocate_return_value(thread, current_frame, obj);
560 thread->set_vm_result(dest);
561 }
562 IRT_END
563
564 IRT_ENTRY(void, InterpreterRuntime::check_areturn(JavaThread* thread, oopDesc* obj))
565 if (obj != NULL) {
566 Klass* k = obj->klass();
567 if (k->is_value()) {
568 ResourceMark rm(thread);
569 tty->print_cr("areturn used on a value from %s", k->name()->as_C_string());
570 }
571 assert(!k->is_value(), "areturn should never be used on values");
572 }
573 thread->set_vm_result(obj);
574 IRT_END
575
576 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
577 assert(obj->is_oop(), "must be a valid oop");
578 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
579 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
580 IRT_END
581
582
583 // Quicken instance-of and check-cast bytecodes
584 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
585 // Force resolving; quicken the bytecode
586 int which = get_index_u2(thread, Bytecodes::_checkcast);
587 ConstantPool* cpool = method(thread)->constants();
588 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
589 // program we might have seen an unquick'd bytecode in the interpreter but have another
590 // thread quicken the bytecode before we get here.
591 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
592 Klass* klass = cpool->klass_at(which, CHECK);
593 thread->set_vm_result_2(klass);
594 IRT_END
595
596
597 //------------------------------------------------------------------------------------------------------------------------
598 // Exceptions
599
600 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
601 methodHandle trap_method, int trap_bci, TRAPS) {
602 if (trap_method.not_null()) {
603 MethodData* trap_mdo = trap_method->method_data();
604 if (trap_mdo == NULL) {
605 Method::build_interpreter_method_data(trap_method, THREAD);
606 if (HAS_PENDING_EXCEPTION) {
607 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
608 "we expect only an OOM error here");
609 CLEAR_PENDING_EXCEPTION;
610 }
611 trap_mdo = trap_method->method_data();
612 // and fall through...
613 }
614 if (trap_mdo != NULL) {
615 // Update per-method count of trap events. The interpreter
616 // is updating the MDO to simulate the effect of compiler traps.
617 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
618 }
619 }
620 }
621
622 // Assume the compiler is (or will be) interested in this event.
623 // If necessary, create an MDO to hold the information, and record it.
624 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
625 assert(ProfileTraps, "call me only if profiling");
626 methodHandle trap_method(thread, method(thread));
627 int trap_bci = trap_method->bci_from(bcp(thread));
628 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
629 }
630
631 #ifdef CC_INTERP
632 // As legacy note_trap, but we have more arguments.
633 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
634 methodHandle trap_method(method);
635 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
636 IRT_END
637
638 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
639 // for each exception.
640 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
641 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
642 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
643 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
644 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
645 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
646 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
647 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
648 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
649 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
650 #endif // CC_INTERP
651
652
653 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
654 // get klass
655 InstanceKlass* klass = InstanceKlass::cast(k);
656 assert(klass->is_initialized(),
657 "this klass should have been initialized during VM initialization");
658 // create instance - do not call constructor since we may have no
659 // (java) stack space left (should assert constructor is empty)
660 Handle exception;
661 oop exception_oop = klass->allocate_instance(CHECK_(exception));
662 exception = Handle(THREAD, exception_oop);
663 if (StackTraceInThrowable) {
664 java_lang_Throwable::fill_in_stack_trace(exception);
665 }
666 return exception;
667 }
668
669 // Special handling for stack overflow: since we don't have any (java) stack
670 // space left we use the pre-allocated & pre-initialized StackOverflowError
671 // klass to create an stack overflow error instance. We do not call its
672 // constructor for the same reason (it is empty, anyway).
673 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
674 Handle exception = get_preinitialized_exception(
675 SystemDictionary::StackOverflowError_klass(),
676 CHECK);
677 // Increment counter for hs_err file reporting
678 Atomic::inc(&Exceptions::_stack_overflow_errors);
679 THROW_HANDLE(exception);
680 IRT_END
681
682 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
683 Handle exception = get_preinitialized_exception(
684 SystemDictionary::StackOverflowError_klass(),
685 CHECK);
686 java_lang_Throwable::set_message(exception(),
687 Universe::delayed_stack_overflow_error_message());
688 // Increment counter for hs_err file reporting
689 Atomic::inc(&Exceptions::_stack_overflow_errors);
690 THROW_HANDLE(exception);
691 IRT_END
692
693 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
694 // lookup exception klass
695 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
696 if (ProfileTraps) {
697 if (s == vmSymbols::java_lang_ArithmeticException()) {
698 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
699 } else if (s == vmSymbols::java_lang_NullPointerException()) {
700 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
701 }
702 }
703 // create exception
704 Handle exception = Exceptions::new_exception(thread, s, message);
705 thread->set_vm_result(exception());
706 IRT_END
707
708
709 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
710 ResourceMark rm(thread);
711 const char* klass_name = obj->klass()->external_name();
712 // lookup exception klass
713 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
714 if (ProfileTraps) {
715 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
716 }
717 // create exception, with klass name as detail message
718 Handle exception = Exceptions::new_exception(thread, s, klass_name);
719 thread->set_vm_result(exception());
720 IRT_END
721
722
723 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
724 char message[jintAsStringSize];
725 // lookup exception klass
726 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
727 if (ProfileTraps) {
728 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
729 }
730 // create exception
731 sprintf(message, "%d", index);
732 THROW_MSG(s, message);
733 IRT_END
734
735 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
736 JavaThread* thread, oopDesc* obj))
737
738 ResourceMark rm(thread);
739 char* message = SharedRuntime::generate_class_cast_message(
740 thread, obj->klass());
741
742 if (ProfileTraps) {
743 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
744 }
745
746 // create exception
747 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
748 IRT_END
749
750 // exception_handler_for_exception(...) returns the continuation address,
751 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
752 // The exception oop is returned to make sure it is preserved over GC (it
753 // is only on the stack if the exception was thrown explicitly via athrow).
754 // During this operation, the expression stack contains the values for the
755 // bci where the exception happened. If the exception was propagated back
756 // from a call, the expression stack contains the values for the bci at the
757 // invoke w/o arguments (i.e., as if one were inside the call).
758 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
759
760 Handle h_exception(thread, exception);
761 methodHandle h_method (thread, method(thread));
762 constantPoolHandle h_constants(thread, h_method->constants());
763 bool should_repeat;
764 int handler_bci;
765 int current_bci = bci(thread);
766
767 if (thread->frames_to_pop_failed_realloc() > 0) {
768 // Allocation of scalar replaced object used in this frame
769 // failed. Unconditionally pop the frame.
770 thread->dec_frames_to_pop_failed_realloc();
771 thread->set_vm_result(h_exception());
772 // If the method is synchronized we already unlocked the monitor
773 // during deoptimization so the interpreter needs to skip it when
774 // the frame is popped.
775 thread->set_do_not_unlock_if_synchronized(true);
776 #ifdef CC_INTERP
777 return (address) -1;
778 #else
779 return Interpreter::remove_activation_entry();
780 #endif
781 }
782
783 // Need to do this check first since when _do_not_unlock_if_synchronized
784 // is set, we don't want to trigger any classloading which may make calls
785 // into java, or surprisingly find a matching exception handler for bci 0
786 // since at this moment the method hasn't been "officially" entered yet.
787 if (thread->do_not_unlock_if_synchronized()) {
788 ResourceMark rm;
789 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
790 thread->set_vm_result(exception);
791 #ifdef CC_INTERP
792 return (address) -1;
793 #else
794 return Interpreter::remove_activation_entry();
795 #endif
796 }
797
798 do {
799 should_repeat = false;
800
801 // assertions
802 #ifdef ASSERT
803 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
804 assert(h_exception->is_oop(), "just checking");
805 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
806 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
807 if (ExitVMOnVerifyError) vm_exit(-1);
808 ShouldNotReachHere();
809 }
810 #endif
811
812 // tracing
813 if (log_is_enabled(Info, exceptions)) {
814 ResourceMark rm(thread);
815 stringStream tempst;
816 tempst.print("interpreter method <%s>\n"
817 " at bci %d for thread " INTPTR_FORMAT,
818 h_method->print_value_string(), current_bci, p2i(thread));
819 Exceptions::log_exception(h_exception, tempst);
820 }
821 // Don't go paging in something which won't be used.
822 // else if (extable->length() == 0) {
823 // // disabled for now - interpreter is not using shortcut yet
824 // // (shortcut is not to call runtime if we have no exception handlers)
825 // // warning("performance bug: should not call runtime if method has no exception handlers");
826 // }
827 // for AbortVMOnException flag
828 Exceptions::debug_check_abort(h_exception);
829
830 // exception handler lookup
831 Klass* klass = h_exception->klass();
832 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
833 if (HAS_PENDING_EXCEPTION) {
834 // We threw an exception while trying to find the exception handler.
835 // Transfer the new exception to the exception handle which will
836 // be set into thread local storage, and do another lookup for an
837 // exception handler for this exception, this time starting at the
838 // BCI of the exception handler which caused the exception to be
839 // thrown (bug 4307310).
840 h_exception = Handle(THREAD, PENDING_EXCEPTION);
841 CLEAR_PENDING_EXCEPTION;
842 if (handler_bci >= 0) {
843 current_bci = handler_bci;
844 should_repeat = true;
845 }
846 }
847 } while (should_repeat == true);
848
849 #if INCLUDE_JVMCI
850 if (EnableJVMCI && h_method->method_data() != NULL) {
851 ResourceMark rm(thread);
852 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
853 if (pdata != NULL && pdata->is_BitData()) {
854 BitData* bit_data = (BitData*) pdata;
855 bit_data->set_exception_seen();
856 }
857 }
858 #endif
859
860 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
861 // time throw or a stack unwinding throw and accordingly notify the debugger
862 if (JvmtiExport::can_post_on_exceptions()) {
863 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
864 }
865
866 #ifdef CC_INTERP
867 address continuation = (address)(intptr_t) handler_bci;
868 #else
869 address continuation = NULL;
870 #endif
871 address handler_pc = NULL;
872 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
873 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
874 // handler in this method, or (b) after a stack overflow there is not yet
875 // enough stack space available to reprotect the stack.
876 #ifndef CC_INTERP
877 continuation = Interpreter::remove_activation_entry();
878 #endif
879 #if COMPILER2_OR_JVMCI
880 // Count this for compilation purposes
881 h_method->interpreter_throwout_increment(THREAD);
882 #endif
883 } else {
884 // handler in this method => change bci/bcp to handler bci/bcp and continue there
885 handler_pc = h_method->code_base() + handler_bci;
886 #ifndef CC_INTERP
887 set_bcp_and_mdp(handler_pc, thread);
888 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
889 #endif
890 }
891 // notify debugger of an exception catch
892 // (this is good for exceptions caught in native methods as well)
893 if (JvmtiExport::can_post_on_exceptions()) {
894 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
895 }
896
897 thread->set_vm_result(h_exception());
898 return continuation;
899 IRT_END
900
901
902 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
903 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
904 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
905 IRT_END
906
907
908 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
909 THROW(vmSymbols::java_lang_AbstractMethodError());
910 IRT_END
911
912
913 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
914 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
915 IRT_END
916
917
918 //------------------------------------------------------------------------------------------------------------------------
919 // Fields
920 //
921
922 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
923 Thread* THREAD = thread;
924 // resolve field
925 fieldDescriptor info;
926 constantPoolHandle pool(thread, method(thread)->constants());
927 methodHandle m(thread, method(thread));
928 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
929 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_vwithfield);
930 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
931 bool is_value = (bytecode == Bytecodes::_vgetfield || bytecode == Bytecodes::_vwithfield);
932
933 {
934 JvmtiHideSingleStepping jhss(thread);
935 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
936 m, bytecode, CHECK);
937 } // end JvmtiHideSingleStepping
938
939 // check if link resolution caused cpCache to be updated
940 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
941 if (cp_cache_entry->is_resolved(bytecode)) return;
942
943 // compute auxiliary field attributes
944 TosState state = as_TosState(info.field_type());
945
946 // Resolution of put instructions on final fields is delayed. That is required so that
947 // exceptions are thrown at the correct place (when the instruction is actually invoked).
948 // If we do not resolve an instruction in the current pass, leaving the put_code
949 // set to zero will cause the next put instruction to the same field to reresolve.
950
951 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
952 // to final instance fields with updates originating from a method different than <init>)
953 // is inhibited. A putfield instruction targeting an instance final field must throw
954 // an IllegalAccessError if the instruction is not in an instance
955 // initializer method <init>. If resolution were not inhibited, a putfield
956 // in an initializer method could be resolved in the initializer. Subsequent
957 // putfield instructions to the same field would then use cached information.
958 // As a result, those instructions would not pass through the VM. That is,
959 // checks in resolve_field_access() would not be executed for those instructions
960 // and the required IllegalAccessError would not be thrown.
961 //
962 // Also, we need to delay resolving getstatic and putstatic instructions until the
963 // class is initialized. This is required so that access to the static
964 // field will call the initialization function every time until the class
965 // is completely initialized ala. in 2.17.5 in JVM Specification.
966 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
967 bool uninitialized_static = is_static && !klass->is_initialized();
968 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
969 info.has_initialized_final_update();
970 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
971
972 Bytecodes::Code get_code = (Bytecodes::Code)0;
973 Bytecodes::Code put_code = (Bytecodes::Code)0;
974 if (!uninitialized_static) {
975 if (is_static) {
976 get_code = Bytecodes::_getstatic;
977 } else {
978 get_code = ((is_value) ? Bytecodes::_vgetfield : Bytecodes::_getfield);
979 }
980 if (is_put && is_value) {
981 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_vwithfield);
982 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
983 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
984 }
985 }
986
987 cp_cache_entry->set_field(
988 get_code,
989 put_code,
990 info.field_holder(),
991 info.index(),
992 info.offset(),
993 state,
994 info.access_flags().is_final(),
995 info.access_flags().is_volatile(),
996 pool->pool_holder()
997 );
998 }
999
1000
1001 //------------------------------------------------------------------------------------------------------------------------
1002 // Synchronization
1003 //
1004 // The interpreter's synchronization code is factored out so that it can
1005 // be shared by method invocation and synchronized blocks.
1006 //%note synchronization_3
1007
1008 //%note monitor_1
1009 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
1010 #ifdef ASSERT
1011 thread->last_frame().interpreter_frame_verify_monitor(elem);
1012 #endif
1013 if (PrintBiasedLockingStatistics) {
1014 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
1015 }
1016 Handle h_obj(thread, elem->obj());
1017 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1018 "must be NULL or an object");
1019 if (UseBiasedLocking) {
1020 // Retry fast entry if bias is revoked to avoid unnecessary inflation
1021 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
1022 } else {
1023 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
1024 }
1025 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
1026 "must be NULL or an object");
1027 #ifdef ASSERT
1028 thread->last_frame().interpreter_frame_verify_monitor(elem);
1029 #endif
1030 IRT_END
1031
1032
1033 //%note monitor_1
1034 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
1035 #ifdef ASSERT
1036 thread->last_frame().interpreter_frame_verify_monitor(elem);
1037 #endif
1038 Handle h_obj(thread, elem->obj());
1039 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1040 "must be NULL or an object");
1041 if (elem == NULL || h_obj()->is_unlocked()) {
1042 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1043 }
1044 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
1045 // Free entry. This must be done here, since a pending exception might be installed on
1046 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
1047 elem->set_obj(NULL);
1048 #ifdef ASSERT
1049 thread->last_frame().interpreter_frame_verify_monitor(elem);
1050 #endif
1051 IRT_END
1052
1053
1054 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
1055 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1056 IRT_END
1057
1058
1059 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
1060 // Returns an illegal exception to install into the current thread. The
1061 // pending_exception flag is cleared so normal exception handling does not
1062 // trigger. Any current installed exception will be overwritten. This
1063 // method will be called during an exception unwind.
1064
1065 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1066 Handle exception(thread, thread->vm_result());
1067 assert(exception() != NULL, "vm result should be set");
1068 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1069 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
1070 exception = get_preinitialized_exception(
1071 SystemDictionary::IllegalMonitorStateException_klass(),
1072 CATCH);
1073 }
1074 thread->set_vm_result(exception());
1075 IRT_END
1076
1077
1078 //------------------------------------------------------------------------------------------------------------------------
1079 // Invokes
1080
1081 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
1082 return method->orig_bytecode_at(method->bci_from(bcp));
1083 IRT_END
1084
1085 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
1086 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1087 IRT_END
1088
1089 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
1090 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
1091 IRT_END
1092
1093 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
1094 Thread* THREAD = thread;
1095 // extract receiver from the outgoing argument list if necessary
1096 Handle receiver(thread, NULL);
1097 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1098 bytecode == Bytecodes::_invokespecial) {
1099 ResourceMark rm(thread);
1100 methodHandle m (thread, method(thread));
1101 Bytecode_invoke call(m, bci(thread));
1102 Symbol* signature = call.signature();
1103 receiver = Handle(thread,
1104 thread->last_frame().interpreter_callee_receiver(signature));
1105 assert(Universe::heap()->is_in_reserved_or_null(receiver())
1106 || VTBuffer::is_in_vt_buffer(receiver()),
1107 "sanity check");
1108 assert(receiver.is_null() ||
1109 !Universe::heap()->is_in_reserved(receiver->klass()),
1110 "sanity check");
1111 }
1112
1113 // resolve method
1114 CallInfo info;
1115 constantPoolHandle pool(thread, method(thread)->constants());
1116
1117 {
1118 JvmtiHideSingleStepping jhss(thread);
1119 LinkResolver::resolve_invoke(info, receiver, pool,
1120 get_index_u2_cpcache(thread, bytecode), bytecode,
1121 CHECK);
1122 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
1123 int retry_count = 0;
1124 while (info.resolved_method()->is_old()) {
1125 // It is very unlikely that method is redefined more than 100 times
1126 // in the middle of resolve. If it is looping here more than 100 times
1127 // means then there could be a bug here.
1128 guarantee((retry_count++ < 100),
1129 "Could not resolve to latest version of redefined method");
1130 // method is redefined in the middle of resolve so re-try.
1131 LinkResolver::resolve_invoke(info, receiver, pool,
1132 get_index_u2_cpcache(thread, bytecode), bytecode,
1133 CHECK);
1134 }
1135 }
1136 } // end JvmtiHideSingleStepping
1137
1138 // check if link resolution caused cpCache to be updated
1139 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
1140 if (cp_cache_entry->is_resolved(bytecode)) return;
1141
1142 #ifdef ASSERT
1143 if (bytecode == Bytecodes::_invokeinterface) {
1144 if (info.resolved_method()->method_holder() ==
1145 SystemDictionary::Object_klass()) {
1146 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1147 // (see also CallInfo::set_interface for details)
1148 assert(info.call_kind() == CallInfo::vtable_call ||
1149 info.call_kind() == CallInfo::direct_call, "");
1150 methodHandle rm = info.resolved_method();
1151 assert(rm->is_final() || info.has_vtable_index(),
1152 "should have been set already");
1153 } else if (!info.resolved_method()->has_itable_index()) {
1154 // Resolved something like CharSequence.toString. Use vtable not itable.
1155 assert(info.call_kind() != CallInfo::itable_call, "");
1156 } else {
1157 // Setup itable entry
1158 assert(info.call_kind() == CallInfo::itable_call, "");
1159 int index = info.resolved_method()->itable_index();
1160 assert(info.itable_index() == index, "");
1161 }
1162 } else if (bytecode == Bytecodes::_invokespecial) {
1163 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1164 } else {
1165 assert(info.call_kind() == CallInfo::direct_call ||
1166 info.call_kind() == CallInfo::vtable_call, "");
1167 }
1168 #endif
1169 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
1170 // it is not an interface. The receiver for invokespecial calls within interface
1171 // methods must be checked for every call.
1172 InstanceKlass* sender = pool->pool_holder();
1173 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1174
1175 switch (info.call_kind()) {
1176 case CallInfo::direct_call:
1177 cp_cache_entry->set_direct_call(
1178 bytecode,
1179 info.resolved_method(),
1180 sender->is_interface());
1181 break;
1182 case CallInfo::vtable_call:
1183 cp_cache_entry->set_vtable_call(
1184 bytecode,
1185 info.resolved_method(),
1186 info.vtable_index());
1187 break;
1188 case CallInfo::itable_call:
1189 cp_cache_entry->set_itable_call(
1190 bytecode,
1191 info.resolved_method(),
1192 info.itable_index());
1193 break;
1194 default: ShouldNotReachHere();
1195 }
1196 }
1197
1198
1199 // First time execution: Resolve symbols, create a permanent MethodType object.
1200 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1201 Thread* THREAD = thread;
1202 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1203
1204 // resolve method
1205 CallInfo info;
1206 constantPoolHandle pool(thread, method(thread)->constants());
1207 {
1208 JvmtiHideSingleStepping jhss(thread);
1209 LinkResolver::resolve_invoke(info, Handle(), pool,
1210 get_index_u2_cpcache(thread, bytecode), bytecode,
1211 CHECK);
1212 } // end JvmtiHideSingleStepping
1213
1214 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
1215 cp_cache_entry->set_method_handle(pool, info);
1216 }
1217
1218 // First time execution: Resolve symbols, create a permanent CallSite object.
1219 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1220 Thread* THREAD = thread;
1221 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1222
1223 //TO DO: consider passing BCI to Java.
1224 // int caller_bci = method(thread)->bci_from(bcp(thread));
1225
1226 // resolve method
1227 CallInfo info;
1228 constantPoolHandle pool(thread, method(thread)->constants());
1229 int index = get_index_u4(thread, bytecode);
1230 {
1231 JvmtiHideSingleStepping jhss(thread);
1232 LinkResolver::resolve_invoke(info, Handle(), pool,
1233 index, bytecode, CHECK);
1234 } // end JvmtiHideSingleStepping
1235
1236 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1237 cp_cache_entry->set_dynamic_call(pool, info);
1238 }
1239
1240 // This function is the interface to the assembly code. It returns the resolved
1241 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1242 // This function will check for redefinition!
1243 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1244 switch (bytecode) {
1245 case Bytecodes::_getstatic:
1246 case Bytecodes::_putstatic:
1247 case Bytecodes::_getfield:
1248 case Bytecodes::_putfield:
1249 case Bytecodes::_vgetfield:
1250 case Bytecodes::_vwithfield:
1251 resolve_get_put(thread, bytecode);
1252 break;
1253 case Bytecodes::_invokevirtual:
1254 case Bytecodes::_invokespecial:
1255 case Bytecodes::_invokestatic:
1256 case Bytecodes::_invokeinterface:
1257 resolve_invoke(thread, bytecode);
1258 break;
1259 case Bytecodes::_invokehandle:
1260 resolve_invokehandle(thread);
1261 break;
1262 case Bytecodes::_invokedynamic:
1263 resolve_invokedynamic(thread);
1264 break;
1265 default:
1266 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1267 break;
1268 }
1269 }
1270 IRT_END
1271
1272 //------------------------------------------------------------------------------------------------------------------------
1273 // Miscellaneous
1274
1275
1276 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1277 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1278 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1279 if (branch_bcp != NULL && nm != NULL) {
1280 // This was a successful request for an OSR nmethod. Because
1281 // frequency_counter_overflow_inner ends with a safepoint check,
1282 // nm could have been unloaded so look it up again. It's unsafe
1283 // to examine nm directly since it might have been freed and used
1284 // for something else.
1285 frame fr = thread->last_frame();
1286 Method* method = fr.interpreter_frame_method();
1287 int bci = method->bci_from(fr.interpreter_frame_bcp());
1288 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1289 }
1290 #ifndef PRODUCT
1291 if (TraceOnStackReplacement) {
1292 if (nm != NULL) {
1293 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1294 nm->print();
1295 }
1296 }
1297 #endif
1298 return nm;
1299 }
1300
1301 IRT_ENTRY(nmethod*,
1302 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1303 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1304 // flag, in case this method triggers classloading which will call into Java.
1305 UnlockFlagSaver fs(thread);
1306
1307 frame fr = thread->last_frame();
1308 assert(fr.is_interpreted_frame(), "must come from interpreter");
1309 methodHandle method(thread, fr.interpreter_frame_method());
1310 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1311 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
1312
1313 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1314 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1315 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1316
1317 if (osr_nm != NULL) {
1318 // We may need to do on-stack replacement which requires that no
1319 // monitors in the activation are biased because their
1320 // BasicObjectLocks will need to migrate during OSR. Force
1321 // unbiasing of all monitors in the activation now (even though
1322 // the OSR nmethod might be invalidated) because we don't have a
1323 // safepoint opportunity later once the migration begins.
1324 if (UseBiasedLocking) {
1325 ResourceMark rm;
1326 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1327 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
1328 kptr < fr.interpreter_frame_monitor_begin();
1329 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
1330 if( kptr->obj() != NULL ) {
1331 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1332 }
1333 }
1334 BiasedLocking::revoke(objects_to_revoke);
1335 }
1336 }
1337 return osr_nm;
1338 IRT_END
1339
1340 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1341 assert(ProfileInterpreter, "must be profiling interpreter");
1342 int bci = method->bci_from(cur_bcp);
1343 MethodData* mdo = method->method_data();
1344 if (mdo == NULL) return 0;
1345 return mdo->bci_to_di(bci);
1346 IRT_END
1347
1348 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1349 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1350 // flag, in case this method triggers classloading which will call into Java.
1351 UnlockFlagSaver fs(thread);
1352
1353 assert(ProfileInterpreter, "must be profiling interpreter");
1354 frame fr = thread->last_frame();
1355 assert(fr.is_interpreted_frame(), "must come from interpreter");
1356 methodHandle method(thread, fr.interpreter_frame_method());
1357 Method::build_interpreter_method_data(method, THREAD);
1358 if (HAS_PENDING_EXCEPTION) {
1359 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1360 CLEAR_PENDING_EXCEPTION;
1361 // and fall through...
1362 }
1363 IRT_END
1364
1365
1366 #ifdef ASSERT
1367 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1368 assert(ProfileInterpreter, "must be profiling interpreter");
1369
1370 MethodData* mdo = method->method_data();
1371 assert(mdo != NULL, "must not be null");
1372
1373 int bci = method->bci_from(bcp);
1374
1375 address mdp2 = mdo->bci_to_dp(bci);
1376 if (mdp != mdp2) {
1377 ResourceMark rm;
1378 ResetNoHandleMark rnm; // In a LEAF entry.
1379 HandleMark hm;
1380 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1381 int current_di = mdo->dp_to_di(mdp);
1382 int expected_di = mdo->dp_to_di(mdp2);
1383 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1384 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1385 int approx_bci = -1;
1386 if (current_di >= 0) {
1387 approx_bci = mdo->data_at(current_di)->bci();
1388 }
1389 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1390 mdo->print_on(tty);
1391 method->print_codes();
1392 }
1393 assert(mdp == mdp2, "wrong mdp");
1394 IRT_END
1395 #endif // ASSERT
1396
1397 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1398 assert(ProfileInterpreter, "must be profiling interpreter");
1399 ResourceMark rm(thread);
1400 HandleMark hm(thread);
1401 frame fr = thread->last_frame();
1402 assert(fr.is_interpreted_frame(), "must come from interpreter");
1403 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1404
1405 // Grab a lock to ensure atomic access to setting the return bci and
1406 // the displacement. This can block and GC, invalidating all naked oops.
1407 MutexLocker ml(RetData_lock);
1408
1409 // ProfileData is essentially a wrapper around a derived oop, so we
1410 // need to take the lock before making any ProfileData structures.
1411 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1412 RetData* rdata = data->as_RetData();
1413 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1414 fr.interpreter_frame_set_mdp(new_mdp);
1415 IRT_END
1416
1417 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1418 MethodCounters* mcs = Method::build_method_counters(m, thread);
1419 if (HAS_PENDING_EXCEPTION) {
1420 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1421 CLEAR_PENDING_EXCEPTION;
1422 }
1423 return mcs;
1424 IRT_END
1425
1426
1427 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1428 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1429 // stack traversal automatically takes care of preserving arguments for invoke, so
1430 // this is no longer needed.
1431
1432 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1433 // if this is called during a safepoint
1434
1435 if (JvmtiExport::should_post_single_step()) {
1436 // We are called during regular safepoints and when the VM is
1437 // single stepping. If any thread is marked for single stepping,
1438 // then we may have JVMTI work to do.
1439 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1440 }
1441 IRT_END
1442
1443 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1444 ConstantPoolCacheEntry *cp_entry))
1445
1446 // check the access_flags for the field in the klass
1447
1448 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1449 int index = cp_entry->field_index();
1450 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1451
1452 bool is_static = (obj == NULL);
1453 HandleMark hm(thread);
1454
1455 Handle h_obj;
1456 if (!is_static) {
1457 // non-static field accessors have an object, but we need a handle
1458 h_obj = Handle(thread, obj);
1459 }
1460 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1461 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1462 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), cp_entry_f1, h_obj, fid);
1463 IRT_END
1464
1465 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1466 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1467
1468 Klass* k = cp_entry->f1_as_klass();
1469
1470 // check the access_flags for the field in the klass
1471 InstanceKlass* ik = InstanceKlass::cast(k);
1472 int index = cp_entry->field_index();
1473 // bail out if field modifications are not watched
1474 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1475
1476 char sig_type = '\0';
1477
1478 switch(cp_entry->flag_state()) {
1479 case btos: sig_type = 'B'; break;
1480 case ztos: sig_type = 'Z'; break;
1481 case ctos: sig_type = 'C'; break;
1482 case stos: sig_type = 'S'; break;
1483 case itos: sig_type = 'I'; break;
1484 case ftos: sig_type = 'F'; break;
1485 case atos: sig_type = 'L'; break;
1486 case ltos: sig_type = 'J'; break;
1487 case dtos: sig_type = 'D'; break;
1488 default: ShouldNotReachHere(); return;
1489 }
1490 bool is_static = (obj == NULL);
1491
1492 HandleMark hm(thread);
1493 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1494 jvalue fvalue;
1495 #ifdef _LP64
1496 fvalue = *value;
1497 #else
1498 // Long/double values are stored unaligned and also noncontiguously with
1499 // tagged stacks. We can't just do a simple assignment even in the non-
1500 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1501 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1502 // We assume that the two halves of longs/doubles are stored in interpreter
1503 // stack slots in platform-endian order.
1504 jlong_accessor u;
1505 jint* newval = (jint*)value;
1506 u.words[0] = newval[0];
1507 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1508 fvalue.j = u.long_value;
1509 #endif // _LP64
1510
1511 Handle h_obj;
1512 if (!is_static) {
1513 // non-static field accessors have an object, but we need a handle
1514 h_obj = Handle(thread, obj);
1515 }
1516
1517 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), ik, h_obj,
1518 fid, sig_type, &fvalue);
1519 IRT_END
1520
1521 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1522 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1523 IRT_END
1524
1525
1526 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1527 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1528 IRT_END
1529
1530 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1531 {
1532 return (Interpreter::contains(pc) ? 1 : 0);
1533 }
1534 IRT_END
1535
1536
1537 // Implementation of SignatureHandlerLibrary
1538
1539 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1540 // Dummy definition (else normalization method is defined in CPU
1541 // dependant code)
1542 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1543 return fingerprint;
1544 }
1545 #endif
1546
1547 address SignatureHandlerLibrary::set_handler_blob() {
1548 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1549 if (handler_blob == NULL) {
1550 return NULL;
1551 }
1552 address handler = handler_blob->code_begin();
1553 _handler_blob = handler_blob;
1554 _handler = handler;
1555 return handler;
1556 }
1557
1558 void SignatureHandlerLibrary::initialize() {
1559 if (_fingerprints != NULL) {
1560 return;
1561 }
1562 if (set_handler_blob() == NULL) {
1563 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1564 }
1565
1566 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1567 SignatureHandlerLibrary::buffer_size);
1568 _buffer = bb->code_begin();
1569
1570 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1571 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1572 }
1573
1574 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1575 address handler = _handler;
1576 int insts_size = buffer->pure_insts_size();
1577 if (handler + insts_size > _handler_blob->code_end()) {
1578 // get a new handler blob
1579 handler = set_handler_blob();
1580 }
1581 if (handler != NULL) {
1582 memcpy(handler, buffer->insts_begin(), insts_size);
1583 pd_set_handler(handler);
1584 ICache::invalidate_range(handler, insts_size);
1585 _handler = handler + insts_size;
1586 }
1587 return handler;
1588 }
1589
1590 void SignatureHandlerLibrary::add(const methodHandle& method) {
1591 if (method->signature_handler() == NULL) {
1592 // use slow signature handler if we can't do better
1593 int handler_index = -1;
1594 // check if we can use customized (fast) signature handler
1595 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1596 // use customized signature handler
1597 MutexLocker mu(SignatureHandlerLibrary_lock);
1598 // make sure data structure is initialized
1599 initialize();
1600 // lookup method signature's fingerprint
1601 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1602 // allow CPU dependant code to optimize the fingerprints for the fast handler
1603 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1604 handler_index = _fingerprints->find(fingerprint);
1605 // create handler if necessary
1606 if (handler_index < 0) {
1607 ResourceMark rm;
1608 ptrdiff_t align_offset = (address)
1609 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1610 CodeBuffer buffer((address)(_buffer + align_offset),
1611 SignatureHandlerLibrary::buffer_size - align_offset);
1612 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1613 // copy into code heap
1614 address handler = set_handler(&buffer);
1615 if (handler == NULL) {
1616 // use slow signature handler (without memorizing it in the fingerprints)
1617 } else {
1618 // debugging suppport
1619 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1620 ttyLocker ttyl;
1621 tty->cr();
1622 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1623 _handlers->length(),
1624 (method->is_static() ? "static" : "receiver"),
1625 method->name_and_sig_as_C_string(),
1626 fingerprint,
1627 buffer.insts_size());
1628 if (buffer.insts_size() > 0) {
1629 Disassembler::decode(handler, handler + buffer.insts_size());
1630 }
1631 #ifndef PRODUCT
1632 address rh_begin = Interpreter::result_handler(method()->result_type());
1633 if (CodeCache::contains(rh_begin)) {
1634 // else it might be special platform dependent values
1635 tty->print_cr(" --- associated result handler ---");
1636 address rh_end = rh_begin;
1637 while (*(int*)rh_end != 0) {
1638 rh_end += sizeof(int);
1639 }
1640 Disassembler::decode(rh_begin, rh_end);
1641 } else {
1642 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1643 }
1644 #endif
1645 }
1646 // add handler to library
1647 _fingerprints->append(fingerprint);
1648 _handlers->append(handler);
1649 // set handler index
1650 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1651 handler_index = _fingerprints->length() - 1;
1652 }
1653 }
1654 // Set handler under SignatureHandlerLibrary_lock
1655 if (handler_index < 0) {
1656 // use generic signature handler
1657 method->set_signature_handler(Interpreter::slow_signature_handler());
1658 } else {
1659 // set handler
1660 method->set_signature_handler(_handlers->at(handler_index));
1661 }
1662 } else {
1663 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1664 // use generic signature handler
1665 method->set_signature_handler(Interpreter::slow_signature_handler());
1666 }
1667 }
1668 #ifdef ASSERT
1669 int handler_index = -1;
1670 int fingerprint_index = -2;
1671 {
1672 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1673 // in any way if accessed from multiple threads. To avoid races with another
1674 // thread which may change the arrays in the above, mutex protected block, we
1675 // have to protect this read access here with the same mutex as well!
1676 MutexLocker mu(SignatureHandlerLibrary_lock);
1677 if (_handlers != NULL) {
1678 handler_index = _handlers->find(method->signature_handler());
1679 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1680 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1681 fingerprint_index = _fingerprints->find(fingerprint);
1682 }
1683 }
1684 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1685 handler_index == fingerprint_index, "sanity check");
1686 #endif // ASSERT
1687 }
1688
1689 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1690 int handler_index = -1;
1691 // use customized signature handler
1692 MutexLocker mu(SignatureHandlerLibrary_lock);
1693 // make sure data structure is initialized
1694 initialize();
1695 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1696 handler_index = _fingerprints->find(fingerprint);
1697 // create handler if necessary
1698 if (handler_index < 0) {
1699 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1700 tty->cr();
1701 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1702 _handlers->length(),
1703 p2i(handler),
1704 fingerprint);
1705 }
1706 _fingerprints->append(fingerprint);
1707 _handlers->append(handler);
1708 } else {
1709 if (PrintSignatureHandlers) {
1710 tty->cr();
1711 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1712 _handlers->length(),
1713 fingerprint,
1714 p2i(_handlers->at(handler_index)),
1715 p2i(handler));
1716 }
1717 }
1718 }
1719
1720
1721 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1722 address SignatureHandlerLibrary::_handler = NULL;
1723 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1724 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1725 address SignatureHandlerLibrary::_buffer = NULL;
1726
1727
1728 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1729 methodHandle m(thread, method);
1730 assert(m->is_native(), "sanity check");
1731 // lookup native function entry point if it doesn't exist
1732 bool in_base_library;
1733 if (!m->has_native_function()) {
1734 NativeLookup::lookup(m, in_base_library, CHECK);
1735 }
1736 // make sure signature handler is installed
1737 SignatureHandlerLibrary::add(m);
1738 // The interpreter entry point checks the signature handler first,
1739 // before trying to fetch the native entry point and klass mirror.
1740 // We must set the signature handler last, so that multiple processors
1741 // preparing the same method will be sure to see non-null entry & mirror.
1742 IRT_END
1743
1744 #if defined(IA32) || defined(AMD64) || defined(ARM)
1745 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1746 if (src_address == dest_address) {
1747 return;
1748 }
1749 ResetNoHandleMark rnm; // In a LEAF entry.
1750 HandleMark hm;
1751 ResourceMark rm;
1752 frame fr = thread->last_frame();
1753 assert(fr.is_interpreted_frame(), "");
1754 jint bci = fr.interpreter_frame_bci();
1755 methodHandle mh(thread, fr.interpreter_frame_method());
1756 Bytecode_invoke invoke(mh, bci);
1757 ArgumentSizeComputer asc(invoke.signature());
1758 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1759 Copy::conjoint_jbytes(src_address, dest_address,
1760 size_of_arguments * Interpreter::stackElementSize);
1761 IRT_END
1762 #endif
1763
1764 #if INCLUDE_JVMTI
1765 // This is a support of the JVMTI PopFrame interface.
1766 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1767 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1768 // The member_name argument is a saved reference (in local#0) to the member_name.
1769 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1770 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1771 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1772 Method* method, address bcp))
1773 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1774 if (code != Bytecodes::_invokestatic) {
1775 return;
1776 }
1777 ConstantPool* cpool = method->constants();
1778 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1779 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1780 Symbol* mname = cpool->name_ref_at(cp_index);
1781
1782 if (MethodHandles::has_member_arg(cname, mname)) {
1783 oop member_name_oop = (oop) member_name;
1784 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1785 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1786 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1787 }
1788 thread->set_vm_result(member_name_oop);
1789 } else {
1790 thread->set_vm_result(NULL);
1791 }
1792 IRT_END
1793 #endif // INCLUDE_JVMTI
1794
1795 #ifndef PRODUCT
1796 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1797 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1798 // The generated code still uses call_VM because that will set up the frame pointer for
1799 // bcp and method.
1800 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1801 const frame f = thread->last_frame();
1802 assert(f.is_interpreted_frame(), "must be an interpreted frame");
1803 methodHandle mh(thread, f.interpreter_frame_method());
1804 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2);
1805 return preserve_this_value;
1806 IRT_END
1807 #endif // !PRODUCT