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