1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/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/barrierSetNMethod.hpp"
33 #include "gc/shared/collectedHeap.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "interpreter/interpreterRuntime.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "interpreter/templateTable.hpp"
38 #include "logging/log.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "memory/universe.hpp"
42 #include "oops/constantPool.hpp"
43 #include "oops/cpCache.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/methodData.hpp"
46 #include "oops/objArrayKlass.hpp"
47 #include "oops/objArrayOop.inline.hpp"
48 #include "oops/oop.inline.hpp"
49 #include "oops/symbol.hpp"
50 #include "oops/valueKlass.hpp"
51 #include "oops/valueArrayKlass.hpp"
52 #include "oops/valueArrayOop.hpp"
53 #include "oops/valueArrayOop.inline.hpp"
54 #include "prims/jvmtiExport.hpp"
55 #include "prims/nativeLookup.hpp"
56 #include "runtime/atomic.hpp"
57 #include "runtime/biasedLocking.hpp"
58 #include "runtime/compilationPolicy.hpp"
59 #include "runtime/deoptimization.hpp"
60 #include "runtime/fieldDescriptor.inline.hpp"
61 #include "runtime/frame.inline.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/icache.hpp"
64 #include "runtime/interfaceSupport.inline.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/osThread.hpp"
69 #include "runtime/sharedRuntime.hpp"
70 #include "runtime/stubRoutines.hpp"
71 #include "runtime/synchronizer.hpp"
72 #include "runtime/threadCritical.hpp"
73 #include "utilities/align.hpp"
74 #include "utilities/copy.hpp"
75 #include "utilities/events.hpp"
76 #include "utilities/globalDefinitions.hpp"
77 #ifdef COMPILER2
78 #include "opto/runtime.hpp"
79 #endif
80
81 class UnlockFlagSaver {
82 private:
83 JavaThread* _thread;
84 bool _do_not_unlock;
85 public:
86 UnlockFlagSaver(JavaThread* t) {
87 _thread = t;
88 _do_not_unlock = t->do_not_unlock_if_synchronized();
89 t->set_do_not_unlock_if_synchronized(false);
90 }
91 ~UnlockFlagSaver() {
92 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
93 }
94 };
95
96 // Helper class to access current interpreter state
97 class LastFrameAccessor : public StackObj {
98 frame _last_frame;
99 public:
100 LastFrameAccessor(JavaThread* thread) {
101 assert(thread == Thread::current(), "sanity");
102 _last_frame = thread->last_frame();
103 }
104 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
105 Method* method() const { return _last_frame.interpreter_frame_method(); }
106 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
107 int bci() const { return _last_frame.interpreter_frame_bci(); }
108 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
109
110 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
111 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
112
113 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
114 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
115
116 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
117 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
118 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
119 int get_index_u2_cpcache(Bytecodes::Code bc) const
120 { return bytecode().get_index_u2_cpcache(bc); }
121 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
122 int number_of_dimensions() const { return bcp()[3]; }
123 ConstantPoolCacheEntry* cache_entry_at(int i) const
124 { return method()->constants()->cache()->entry_at(i); }
125 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
126
127 oop callee_receiver(Symbol* signature) {
128 return _last_frame.interpreter_callee_receiver(signature);
129 }
130 BasicObjectLock* monitor_begin() const {
131 return _last_frame.interpreter_frame_monitor_begin();
132 }
133 BasicObjectLock* monitor_end() const {
134 return _last_frame.interpreter_frame_monitor_end();
135 }
136 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
137 return _last_frame.next_monitor_in_interpreter_frame(current);
138 }
139
140 frame& get_frame() { return _last_frame; }
141 };
142
143 //------------------------------------------------------------------------------------------------------------------------
144 // State accessors
145
146 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
147 LastFrameAccessor last_frame(thread);
148 last_frame.set_bcp(bcp);
149 if (ProfileInterpreter) {
150 // ProfileTraps uses MDOs independently of ProfileInterpreter.
151 // That is why we must check both ProfileInterpreter and mdo != NULL.
152 MethodData* mdo = last_frame.method()->method_data();
153 if (mdo != NULL) {
154 NEEDS_CLEANUP;
155 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
156 }
157 }
158 }
159
160 //------------------------------------------------------------------------------------------------------------------------
161 // Constants
162
163
164 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
165 // access constant pool
166 LastFrameAccessor last_frame(thread);
167 ConstantPool* pool = last_frame.method()->constants();
168 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
169 constantTag tag = pool->tag_at(index);
170
171 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
172 Klass* klass = pool->klass_at(index, CHECK);
173 oop java_class = klass->java_mirror();
174 thread->set_vm_result(java_class);
175 IRT_END
176
177 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
178 assert(bytecode == Bytecodes::_ldc ||
179 bytecode == Bytecodes::_ldc_w ||
180 bytecode == Bytecodes::_ldc2_w ||
181 bytecode == Bytecodes::_fast_aldc ||
182 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
183 ResourceMark rm(thread);
184 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
185 bytecode == Bytecodes::_fast_aldc_w);
186 LastFrameAccessor last_frame(thread);
187 methodHandle m (thread, last_frame.method());
188 Bytecode_loadconstant ldc(m, last_frame.bci());
189
190 // Double-check the size. (Condy can have any type.)
191 BasicType type = ldc.result_type();
192 switch (type2size[type]) {
193 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
194 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
195 default: ShouldNotReachHere();
196 }
197
198 // Resolve the constant. This does not do unboxing.
199 // But it does replace Universe::the_null_sentinel by null.
200 oop result = ldc.resolve_constant(CHECK);
201 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
202
203 #ifdef ASSERT
204 {
205 // The bytecode wrappers aren't GC-safe so construct a new one
206 Bytecode_loadconstant ldc2(m, last_frame.bci());
207 int rindex = ldc2.cache_index();
208 if (rindex < 0)
209 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
210 if (rindex >= 0) {
211 oop coop = m->constants()->resolved_references()->obj_at(rindex);
212 oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
213 assert(oopDesc::equals(roop, coop), "expected result for assembly code");
214 }
215 }
216 #endif
217 thread->set_vm_result(result);
218 if (!is_fast_aldc) {
219 // Tell the interpreter how to unbox the primitive.
220 guarantee(java_lang_boxing_object::is_instance(result, type), "");
221 int offset = java_lang_boxing_object::value_offset_in_bytes(type);
222 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
223 | (offset & ConstantPoolCacheEntry::field_index_mask));
224 thread->set_vm_result_2((Metadata*)flags);
225 }
226 }
227 IRT_END
228
229
230 //------------------------------------------------------------------------------------------------------------------------
231 // Allocation
232
233 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
234 Klass* k = pool->klass_at(index, CHECK);
235 InstanceKlass* klass = InstanceKlass::cast(k);
236
237 // Make sure we are not instantiating an abstract klass
238 klass->check_valid_for_instantiation(true, CHECK);
239
240 // Make sure klass is initialized
241 klass->initialize(CHECK);
242
243 // At this point the class may not be fully initialized
244 // because of recursive initialization. If it is fully
245 // initialized & has_finalized is not set, we rewrite
246 // it into its fast version (Note: no locking is needed
247 // here since this is an atomic byte write and can be
248 // done more than once).
249 //
250 // Note: In case of classes with has_finalized we don't
251 // rewrite since that saves us an extra check in
252 // the fast version which then would call the
253 // slow version anyway (and do a call back into
254 // Java).
255 // If we have a breakpoint, then we don't rewrite
256 // because the _breakpoint bytecode would be lost.
257 oop obj = klass->allocate_instance(CHECK);
258 thread->set_vm_result(obj);
259 IRT_END
260
261 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) {
262 switch (type) {
263 case T_BOOLEAN:
264 instance()->bool_field_put(offset, (jboolean)*((int*)addr));
265 break;
266 case T_CHAR:
267 instance()->char_field_put(offset, (jchar) *((int*)addr));
268 break;
269 case T_FLOAT:
270 instance()->float_field_put(offset, (jfloat)*((float*)addr));
271 break;
272 case T_DOUBLE:
273 instance()->double_field_put(offset, (jdouble)*((double*)addr));
274 break;
275 case T_BYTE:
276 instance()->byte_field_put(offset, (jbyte)*((int*)addr));
277 break;
278 case T_SHORT:
279 instance()->short_field_put(offset, (jshort)*((int*)addr));
280 break;
281 case T_INT:
282 instance()->int_field_put(offset, (jint)*((int*)addr));
283 break;
284 case T_LONG:
285 instance()->long_field_put(offset, (jlong)*((long long*)addr));
286 break;
287 case T_OBJECT:
288 case T_ARRAY:
289 case T_VALUETYPE:
290 fatal("Should not be handled with this method");
291 break;
292 default:
293 fatal("Unsupported BasicType");
294 }
295 }
296
297 IRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* thread, ConstantPool* pool, int index))
298 // Getting the ValueKlass
299 Klass* k = pool->klass_at(index, CHECK);
300 assert(k->is_value(), "defaultvalue argument must be the value type class");
301 ValueKlass* vklass = ValueKlass::cast(k);
302
303 vklass->initialize(THREAD);
304 oop res = vklass->default_value();
305 thread->set_vm_result(res);
306 IRT_END
307
308 IRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* thread, ConstantPoolCache* cp_cache))
309 LastFrameAccessor last_frame(thread);
310 // Getting the ValueKlass
311 int index = ConstantPool::decode_cpcache_index(last_frame.get_index_u2_cpcache(Bytecodes::_withfield));
312 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
313 assert(cp_entry->is_resolved(Bytecodes::_withfield), "Should have been resolved");
314 Klass* klass = cp_entry->f1_as_klass();
315 assert(klass->is_value(), "withfield only applies to value types");
316 ValueKlass* vklass = ValueKlass::cast(klass);
317
318 // Getting Field information
319 int offset = cp_entry->f2_as_index();
320 int field_index = cp_entry->field_index();
321 int field_offset = cp_entry->f2_as_offset();
322 Symbol* field_signature = vklass->field_signature(field_index);
323 ResourceMark rm(THREAD);
324 const char* signature = (const char *) field_signature->as_utf8();
325 BasicType field_type = char2type(signature[0]);
326
327 // Getting old value
328 frame& f = last_frame.get_frame();
329 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1;
330 int vt_offset = type2size[field_type];
331 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset);
332 assert(old_value != NULL && oopDesc::is_oop(old_value) && old_value->is_value(),"Verifying receiver");
333 Handle old_value_h(THREAD, old_value);
334
335 // Creating new value by copying the one passed in argument
336 instanceOop new_value = vklass->allocate_instance(
337 CHECK_((type2size[field_type]) * AbstractInterpreter::stackElementSize));
338 Handle new_value_h = Handle(THREAD, new_value);
339 int first_offset = vklass->first_field_offset();
340 vklass->value_store(vklass->data_for_oop(old_value_h()),
341 vklass->data_for_oop(new_value_h()), true, false);
342
343 // Updating the field specified in arguments
344 if (field_type == T_ARRAY || field_type == T_OBJECT) {
345 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
346 assert(aoop == NULL || oopDesc::is_oop(aoop),"argument must be a reference type");
347 new_value_h()->obj_field_put(field_offset, aoop);
348 } else if (field_type == T_VALUETYPE) {
349 if (cp_entry->is_flattened()) {
350 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
351 if (vt_oop == NULL) {
352 THROW_(vmSymbols::java_lang_NullPointerException(),
353 (type2size[field_type] * AbstractInterpreter::stackElementSize));
354 }
355 assert(vt_oop != NULL && oopDesc::is_oop(vt_oop) && vt_oop->is_value(),"argument must be a value type");
356 Klass* field_k = vklass->get_value_field_klass(field_index);
357 ValueKlass* field_vk = ValueKlass::cast(field_k);
358 assert(field_vk == vt_oop->klass(), "Must match");
359 field_vk->value_store(field_vk->data_for_oop(vt_oop),
360 ((char*)(oopDesc*)new_value_h()) + field_offset, false, false);
361 } else { // not flattened
362 oop voop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
363 if (voop == NULL && cp_entry->is_flattenable()) {
364 THROW_(vmSymbols::java_lang_NullPointerException(),
365 (type2size[field_type] * AbstractInterpreter::stackElementSize));
366 }
367 assert(voop == NULL || oopDesc::is_oop(voop),"checking argument");
368 new_value_h()->obj_field_put(field_offset, voop);
369 }
370 } else { // not T_OBJECT nor T_ARRAY nor T_VALUETYPE
371 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx);
372 copy_primitive_argument(addr, new_value_h, field_offset, field_type);
373 }
374
375 // returning result
376 thread->set_vm_result(new_value_h());
377 return (type2size[field_type] + type2size[T_OBJECT]) * AbstractInterpreter::stackElementSize;
378 IRT_END
379
380 IRT_ENTRY(void, InterpreterRuntime::uninitialized_static_value_field(JavaThread* thread, oopDesc* mirror, int index))
381 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
382 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
383 int offset = klass->field_offset(index);
384 Klass* field_k = klass->get_value_field_klass_or_null(index);
385 assert(field_k != NULL, "Must have been initialized");
386 ValueKlass* field_vklass = ValueKlass::cast(field_k);
387 instanceOop res = (instanceOop)field_vklass->default_value();
388 thread->set_vm_result(res);
389 IRT_END
390
391 IRT_ENTRY(void, InterpreterRuntime::uninitialized_instance_value_field(JavaThread* thread, oopDesc* obj, int index))
392 instanceHandle obj_h(THREAD, (instanceOop)obj);
393 InstanceKlass* klass = InstanceKlass::cast(obj_h()->klass());
394 Klass* field_k = klass->get_value_field_klass_or_null(index);
395 assert(field_k != NULL, "Must have been initialized");
396 ValueKlass* field_vklass = ValueKlass::cast(field_k);
397 assert(field_vklass->is_initialized(), "Must have been initialized at this point");
398 instanceOop res = (instanceOop)field_vklass->default_value();
399 thread->set_vm_result(res);
400 IRT_END
401
402 IRT_ENTRY(void, InterpreterRuntime::write_flattened_value(JavaThread* thread, oopDesc* value, int offset, oopDesc* rcv))
403 assert(oopDesc::is_oop(value), "Sanity check");
404 assert(oopDesc::is_oop(rcv), "Sanity check");
405 assert(value->is_value(), "Sanity check");
406
407 ValueKlass* vklass = ValueKlass::cast(value->klass());
408 vklass->value_store(vklass->data_for_oop(value), ((char*)(oopDesc*)rcv) + offset, true, true);
409 IRT_END
410
411 IRT_ENTRY(void, InterpreterRuntime::read_flattened_field(JavaThread* thread, oopDesc* obj, int index, Klass* field_holder))
412 Handle obj_h(THREAD, obj);
413
414 assert(oopDesc::is_oop(obj), "Sanity check");
415
416 assert(field_holder->is_instance_klass(), "Sanity check");
417 InstanceKlass* klass = InstanceKlass::cast(field_holder);
418
419 assert(klass->field_is_flattened(index), "Sanity check");
420
421 ValueKlass* field_vklass = ValueKlass::cast(klass->get_value_field_klass(index));
422 assert(field_vklass->is_initialized(), "Must be initialized at this point");
423
424 // allocate instance
425 instanceOop res = field_vklass->allocate_instance(CHECK);
426 // copy value
427 field_vklass->value_store(((char*)(oopDesc*)obj_h()) + klass->field_offset(index),
428 field_vklass->data_for_oop(res), true, true);
429 thread->set_vm_result(res);
430 IRT_END
431
432 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
433 oop obj = oopFactory::new_typeArray(type, size, CHECK);
434 thread->set_vm_result(obj);
435 IRT_END
436
437
438 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
439 Klass* klass = pool->klass_at(index, CHECK);
440 bool is_qtype_desc = pool->tag_at(index).is_Qdescriptor_klass();
441 arrayOop obj;
442 if ((!klass->is_array_klass()) && is_qtype_desc) { // Logically creates elements, ensure klass init
443 klass->initialize(CHECK);
444 obj = oopFactory::new_valueArray(klass, size, CHECK);
445 } else {
446 obj = oopFactory::new_objArray(klass, size, CHECK);
447 }
448 thread->set_vm_result(obj);
449 IRT_END
450
451 IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
452 Klass* klass = array->klass();
453 assert(klass->is_valueArray_klass(), "expected value array oop");
454
455 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
456 ValueKlass* vklass = vaklass->element_klass();
457 arrayHandle ah(THREAD, array);
458 instanceOop value_holder = vklass->allocate_instance(CHECK);
459 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper());
460 vklass->value_store(src, vklass->data_for_oop(value_holder),
461 vaklass->element_byte_size(), true, false);
462 thread->set_vm_result(value_holder);
463 IRT_END
464
465 IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, void* val, arrayOopDesc* array, int index))
466 assert(val != NULL, "can't store null into flat array");
467 Klass* klass = array->klass();
468 assert(klass->is_valueArray_klass(), "expected value array");
469 assert(ArrayKlass::cast(klass)->element_klass() == ((oop)val)->klass(), "Store type incorrect");
470
471 valueArrayOop varray = (valueArrayOop)array;
472 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
473 ValueKlass* vklass = vaklass->element_klass();
474 const int lh = vaklass->layout_helper();
475 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
476 vaklass->element_byte_size(), true, false);
477 IRT_END
478
479 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
480 // We may want to pass in more arguments - could make this slightly faster
481 LastFrameAccessor last_frame(thread);
482 ConstantPool* constants = last_frame.method()->constants();
483 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
484 Klass* klass = constants->klass_at(i, CHECK);
485 bool is_qtype = constants->tag_at(i).is_Qdescriptor_klass();
486 int nof_dims = last_frame.number_of_dimensions();
487 assert(klass->is_klass(), "not a class");
488 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
489
490 if (is_qtype) { // Logically creates elements, ensure klass init
491 klass->initialize(CHECK);
492 }
493
494 // We must create an array of jints to pass to multi_allocate.
495 ResourceMark rm(thread);
496 const int small_dims = 10;
497 jint dim_array[small_dims];
498 jint *dims = &dim_array[0];
499 if (nof_dims > small_dims) {
500 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
501 }
502 for (int index = 0; index < nof_dims; index++) {
503 // offset from first_size_address is addressed as local[index]
504 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
505 dims[index] = first_size_address[n];
506 }
507 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
508 thread->set_vm_result(obj);
509 IRT_END
510
511
512 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
513 assert(oopDesc::is_oop(obj), "must be a valid oop");
514 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
515 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
516 IRT_END
517
518
519 // Quicken instance-of and check-cast bytecodes
520 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
521 // Force resolving; quicken the bytecode
522 LastFrameAccessor last_frame(thread);
523 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
524 ConstantPool* cpool = last_frame.method()->constants();
525 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
526 // program we might have seen an unquick'd bytecode in the interpreter but have another
527 // thread quicken the bytecode before we get here.
528 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
529 Klass* klass = cpool->klass_at(which, CHECK);
530 thread->set_vm_result_2(klass);
531 IRT_END
532
533
534 //------------------------------------------------------------------------------------------------------------------------
535 // Exceptions
536
537 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
538 const methodHandle& trap_method, int trap_bci, TRAPS) {
539 if (trap_method.not_null()) {
540 MethodData* trap_mdo = trap_method->method_data();
541 if (trap_mdo == NULL) {
542 Method::build_interpreter_method_data(trap_method, THREAD);
543 if (HAS_PENDING_EXCEPTION) {
544 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
545 "we expect only an OOM error here");
546 CLEAR_PENDING_EXCEPTION;
547 }
548 trap_mdo = trap_method->method_data();
549 // and fall through...
550 }
551 if (trap_mdo != NULL) {
552 // Update per-method count of trap events. The interpreter
553 // is updating the MDO to simulate the effect of compiler traps.
554 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
555 }
556 }
557 }
558
559 // Assume the compiler is (or will be) interested in this event.
560 // If necessary, create an MDO to hold the information, and record it.
561 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
562 assert(ProfileTraps, "call me only if profiling");
563 LastFrameAccessor last_frame(thread);
564 methodHandle trap_method(thread, last_frame.method());
565 int trap_bci = trap_method->bci_from(last_frame.bcp());
566 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
567 }
568
569 #ifdef CC_INTERP
570 // As legacy note_trap, but we have more arguments.
571 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
572 methodHandle trap_method(method);
573 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
574 IRT_END
575
576 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
577 // for each exception.
578 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
579 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
580 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
581 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
582 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
583 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
584 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
585 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
586 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
587 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
588 #endif // CC_INTERP
589
590
591 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
592 // get klass
593 InstanceKlass* klass = InstanceKlass::cast(k);
594 assert(klass->is_initialized(),
595 "this klass should have been initialized during VM initialization");
596 // create instance - do not call constructor since we may have no
597 // (java) stack space left (should assert constructor is empty)
598 Handle exception;
599 oop exception_oop = klass->allocate_instance(CHECK_(exception));
600 exception = Handle(THREAD, exception_oop);
601 if (StackTraceInThrowable) {
602 java_lang_Throwable::fill_in_stack_trace(exception);
603 }
604 return exception;
605 }
606
607 // Special handling for stack overflow: since we don't have any (java) stack
608 // space left we use the pre-allocated & pre-initialized StackOverflowError
609 // klass to create an stack overflow error instance. We do not call its
610 // constructor for the same reason (it is empty, anyway).
611 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
612 Handle exception = get_preinitialized_exception(
613 SystemDictionary::StackOverflowError_klass(),
614 CHECK);
615 // Increment counter for hs_err file reporting
616 Atomic::inc(&Exceptions::_stack_overflow_errors);
617 THROW_HANDLE(exception);
618 IRT_END
619
620 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
621 Handle exception = get_preinitialized_exception(
622 SystemDictionary::StackOverflowError_klass(),
623 CHECK);
624 java_lang_Throwable::set_message(exception(),
625 Universe::delayed_stack_overflow_error_message());
626 // Increment counter for hs_err file reporting
627 Atomic::inc(&Exceptions::_stack_overflow_errors);
628 THROW_HANDLE(exception);
629 IRT_END
630
631 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
632 // lookup exception klass
633 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
634 if (ProfileTraps) {
635 if (s == vmSymbols::java_lang_ArithmeticException()) {
636 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
637 } else if (s == vmSymbols::java_lang_NullPointerException()) {
638 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
639 }
640 }
641 // create exception
642 Handle exception = Exceptions::new_exception(thread, s, message);
643 thread->set_vm_result(exception());
644 IRT_END
645
646
647 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
648 // Produce the error message first because note_trap can safepoint
649 ResourceMark rm(thread);
650 const char* klass_name = obj->klass()->external_name();
651 // lookup exception klass
652 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
653 if (ProfileTraps) {
654 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
655 }
656 // create exception, with klass name as detail message
657 Handle exception = Exceptions::new_exception(thread, s, klass_name);
658 thread->set_vm_result(exception());
659 IRT_END
660
661 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, arrayOopDesc* a, jint index))
662 // Produce the error message first because note_trap can safepoint
663 ResourceMark rm(thread);
664 stringStream ss;
665 ss.print("Index %d out of bounds for length %d", index, a->length());
666
667 if (ProfileTraps) {
668 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
669 }
670
671 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
672 IRT_END
673
674 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
675 JavaThread* thread, oopDesc* obj))
676
677 // Produce the error message first because note_trap can safepoint
678 ResourceMark rm(thread);
679 char* message = SharedRuntime::generate_class_cast_message(
680 thread, obj->klass());
681
682 if (ProfileTraps) {
683 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
684 }
685
686 // create exception
687 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
688 IRT_END
689
690 // exception_handler_for_exception(...) returns the continuation address,
691 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
692 // The exception oop is returned to make sure it is preserved over GC (it
693 // is only on the stack if the exception was thrown explicitly via athrow).
694 // During this operation, the expression stack contains the values for the
695 // bci where the exception happened. If the exception was propagated back
696 // from a call, the expression stack contains the values for the bci at the
697 // invoke w/o arguments (i.e., as if one were inside the call).
698 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
699
700 LastFrameAccessor last_frame(thread);
701 Handle h_exception(thread, exception);
702 methodHandle h_method (thread, last_frame.method());
703 constantPoolHandle h_constants(thread, h_method->constants());
704 bool should_repeat;
705 int handler_bci;
706 int current_bci = last_frame.bci();
707
708 if (thread->frames_to_pop_failed_realloc() > 0) {
709 // Allocation of scalar replaced object used in this frame
710 // failed. Unconditionally pop the frame.
711 thread->dec_frames_to_pop_failed_realloc();
712 thread->set_vm_result(h_exception());
713 // If the method is synchronized we already unlocked the monitor
714 // during deoptimization so the interpreter needs to skip it when
715 // the frame is popped.
716 thread->set_do_not_unlock_if_synchronized(true);
717 #ifdef CC_INTERP
718 return (address) -1;
719 #else
720 return Interpreter::remove_activation_entry();
721 #endif
722 }
723
724 // Need to do this check first since when _do_not_unlock_if_synchronized
725 // is set, we don't want to trigger any classloading which may make calls
726 // into java, or surprisingly find a matching exception handler for bci 0
727 // since at this moment the method hasn't been "officially" entered yet.
728 if (thread->do_not_unlock_if_synchronized()) {
729 ResourceMark rm;
730 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
731 thread->set_vm_result(exception);
732 #ifdef CC_INTERP
733 return (address) -1;
734 #else
735 return Interpreter::remove_activation_entry();
736 #endif
737 }
738
739 do {
740 should_repeat = false;
741
742 // assertions
743 #ifdef ASSERT
744 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
745 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
746 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
747 if (ExitVMOnVerifyError) vm_exit(-1);
748 ShouldNotReachHere();
749 }
750 #endif
751
752 // tracing
753 if (log_is_enabled(Info, exceptions)) {
754 ResourceMark rm(thread);
755 stringStream tempst;
756 tempst.print("interpreter method <%s>\n"
757 " at bci %d for thread " INTPTR_FORMAT " (%s)",
758 h_method->print_value_string(), current_bci, p2i(thread), thread->name());
759 Exceptions::log_exception(h_exception, tempst);
760 }
761 // Don't go paging in something which won't be used.
762 // else if (extable->length() == 0) {
763 // // disabled for now - interpreter is not using shortcut yet
764 // // (shortcut is not to call runtime if we have no exception handlers)
765 // // warning("performance bug: should not call runtime if method has no exception handlers");
766 // }
767 // for AbortVMOnException flag
768 Exceptions::debug_check_abort(h_exception);
769
770 // exception handler lookup
771 Klass* klass = h_exception->klass();
772 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
773 if (HAS_PENDING_EXCEPTION) {
774 // We threw an exception while trying to find the exception handler.
775 // Transfer the new exception to the exception handle which will
776 // be set into thread local storage, and do another lookup for an
777 // exception handler for this exception, this time starting at the
778 // BCI of the exception handler which caused the exception to be
779 // thrown (bug 4307310).
780 h_exception = Handle(THREAD, PENDING_EXCEPTION);
781 CLEAR_PENDING_EXCEPTION;
782 if (handler_bci >= 0) {
783 current_bci = handler_bci;
784 should_repeat = true;
785 }
786 }
787 } while (should_repeat == true);
788
789 #if INCLUDE_JVMCI
790 if (EnableJVMCI && h_method->method_data() != NULL) {
791 ResourceMark rm(thread);
792 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
793 if (pdata != NULL && pdata->is_BitData()) {
794 BitData* bit_data = (BitData*) pdata;
795 bit_data->set_exception_seen();
796 }
797 }
798 #endif
799
800 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
801 // time throw or a stack unwinding throw and accordingly notify the debugger
802 if (JvmtiExport::can_post_on_exceptions()) {
803 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
804 }
805
806 #ifdef CC_INTERP
807 address continuation = (address)(intptr_t) handler_bci;
808 #else
809 address continuation = NULL;
810 #endif
811 address handler_pc = NULL;
812 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
813 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
814 // handler in this method, or (b) after a stack overflow there is not yet
815 // enough stack space available to reprotect the stack.
816 #ifndef CC_INTERP
817 continuation = Interpreter::remove_activation_entry();
818 #endif
819 #if COMPILER2_OR_JVMCI
820 // Count this for compilation purposes
821 h_method->interpreter_throwout_increment(THREAD);
822 #endif
823 } else {
824 // handler in this method => change bci/bcp to handler bci/bcp and continue there
825 handler_pc = h_method->code_base() + handler_bci;
826 #ifndef CC_INTERP
827 set_bcp_and_mdp(handler_pc, thread);
828 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
829 #endif
830 }
831 // notify debugger of an exception catch
832 // (this is good for exceptions caught in native methods as well)
833 if (JvmtiExport::can_post_on_exceptions()) {
834 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
835 }
836
837 thread->set_vm_result(h_exception());
838 return continuation;
839 IRT_END
840
841
842 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
843 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
844 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
845 IRT_END
846
847
848 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
849 THROW(vmSymbols::java_lang_AbstractMethodError());
850 IRT_END
851
852 // This method is called from the "abstract_entry" of the interpreter.
853 // At that point, the arguments have already been removed from the stack
854 // and therefore we don't have the receiver object at our fingertips. (Though,
855 // on some platforms the receiver still resides in a register...). Thus,
856 // we have no choice but print an error message not containing the receiver
857 // type.
858 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* thread,
859 Method* missingMethod))
860 ResourceMark rm(thread);
861 assert(missingMethod != NULL, "sanity");
862 methodHandle m(thread, missingMethod);
863 LinkResolver::throw_abstract_method_error(m, THREAD);
864 IRT_END
865
866 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* thread,
867 Klass* recvKlass,
868 Method* missingMethod))
869 ResourceMark rm(thread);
870 methodHandle mh = methodHandle(thread, missingMethod);
871 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
872 IRT_END
873
874
875 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
876 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
877 IRT_END
878
879 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* thread,
880 Klass* recvKlass,
881 Klass* interfaceKlass))
882 ResourceMark rm(thread);
883 char buf[1000];
884 buf[0] = '\0';
885 jio_snprintf(buf, sizeof(buf),
886 "Class %s does not implement the requested interface %s",
887 recvKlass ? recvKlass->external_name() : "NULL",
888 interfaceKlass ? interfaceKlass->external_name() : "NULL");
889 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
890 IRT_END
891
892 //------------------------------------------------------------------------------------------------------------------------
893 // Fields
894 //
895
896 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
897 Thread* THREAD = thread;
898 // resolve field
899 fieldDescriptor info;
900 LastFrameAccessor last_frame(thread);
901 constantPoolHandle pool(thread, last_frame.method()->constants());
902 methodHandle m(thread, last_frame.method());
903 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
904 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
905 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
906 bool is_value = bytecode == Bytecodes::_withfield;
907
908 {
909 JvmtiHideSingleStepping jhss(thread);
910 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
911 m, bytecode, CHECK);
912 } // end JvmtiHideSingleStepping
913
914 // check if link resolution caused cpCache to be updated
915 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
916 if (cp_cache_entry->is_resolved(bytecode)) return;
917
918 // compute auxiliary field attributes
919 TosState state = as_TosState(info.field_type());
920
921 // Resolution of put instructions on final fields is delayed. That is required so that
922 // exceptions are thrown at the correct place (when the instruction is actually invoked).
923 // If we do not resolve an instruction in the current pass, leaving the put_code
924 // set to zero will cause the next put instruction to the same field to reresolve.
925
926 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
927 // to final instance fields with updates originating from a method different than <init>)
928 // is inhibited. A putfield instruction targeting an instance final field must throw
929 // an IllegalAccessError if the instruction is not in an instance
930 // initializer method <init>. If resolution were not inhibited, a putfield
931 // in an initializer method could be resolved in the initializer. Subsequent
932 // putfield instructions to the same field would then use cached information.
933 // As a result, those instructions would not pass through the VM. That is,
934 // checks in resolve_field_access() would not be executed for those instructions
935 // and the required IllegalAccessError would not be thrown.
936 //
937 // Also, we need to delay resolving getstatic and putstatic instructions until the
938 // class is initialized. This is required so that access to the static
939 // field will call the initialization function every time until the class
940 // is completely initialized ala. in 2.17.5 in JVM Specification.
941 InstanceKlass* klass = info.field_holder();
942 bool uninitialized_static = is_static && !klass->is_initialized();
943 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
944 info.has_initialized_final_update();
945 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
946
947 Bytecodes::Code get_code = (Bytecodes::Code)0;
948 Bytecodes::Code put_code = (Bytecodes::Code)0;
949 if (!uninitialized_static) {
950 if (is_static) {
951 get_code = Bytecodes::_getstatic;
952 } else {
953 get_code = Bytecodes::_getfield;
954 }
955 if (is_put && is_value) {
956 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
957 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
958 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
959 }
960 }
961
962 cp_cache_entry->set_field(
963 get_code,
964 put_code,
965 info.field_holder(),
966 info.index(),
967 info.offset(),
968 state,
969 info.access_flags().is_final(),
970 info.access_flags().is_volatile(),
971 info.is_flattened(),
972 info.is_flattenable(),
973 pool->pool_holder()
974 );
975 }
976
977
978 //------------------------------------------------------------------------------------------------------------------------
979 // Synchronization
980 //
981 // The interpreter's synchronization code is factored out so that it can
982 // be shared by method invocation and synchronized blocks.
983 //%note synchronization_3
984
985 //%note monitor_1
986 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
987 #ifdef ASSERT
988 thread->last_frame().interpreter_frame_verify_monitor(elem);
989 #endif
990 if (PrintBiasedLockingStatistics) {
991 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
992 }
993 Handle h_obj(thread, elem->obj());
994 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
995 "must be NULL or an object");
996 if (UseBiasedLocking) {
997 // Retry fast entry if bias is revoked to avoid unnecessary inflation
998 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
999 } else {
1000 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
1001 }
1002 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
1003 "must be NULL or an object");
1004 #ifdef ASSERT
1005 thread->last_frame().interpreter_frame_verify_monitor(elem);
1006 #endif
1007 IRT_END
1008
1009
1010 //%note monitor_1
1011 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
1012 #ifdef ASSERT
1013 thread->last_frame().interpreter_frame_verify_monitor(elem);
1014 #endif
1015 Handle h_obj(thread, elem->obj());
1016 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
1017 "must be NULL or an object");
1018 if (elem == NULL || h_obj()->is_unlocked()) {
1019 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1020 }
1021 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
1022 // Free entry. This must be done here, since a pending exception might be installed on
1023 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
1024 elem->set_obj(NULL);
1025 #ifdef ASSERT
1026 thread->last_frame().interpreter_frame_verify_monitor(elem);
1027 #endif
1028 IRT_END
1029
1030
1031 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
1032 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1033 IRT_END
1034
1035
1036 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
1037 // Returns an illegal exception to install into the current thread. The
1038 // pending_exception flag is cleared so normal exception handling does not
1039 // trigger. Any current installed exception will be overwritten. This
1040 // method will be called during an exception unwind.
1041
1042 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1043 Handle exception(thread, thread->vm_result());
1044 assert(exception() != NULL, "vm result should be set");
1045 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1046 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
1047 exception = get_preinitialized_exception(
1048 SystemDictionary::IllegalMonitorStateException_klass(),
1049 CATCH);
1050 }
1051 thread->set_vm_result(exception());
1052 IRT_END
1053
1054
1055 //------------------------------------------------------------------------------------------------------------------------
1056 // Invokes
1057
1058 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
1059 return method->orig_bytecode_at(method->bci_from(bcp));
1060 IRT_END
1061
1062 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
1063 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1064 IRT_END
1065
1066 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
1067 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
1068 IRT_END
1069
1070 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
1071 Thread* THREAD = thread;
1072 LastFrameAccessor last_frame(thread);
1073 // extract receiver from the outgoing argument list if necessary
1074 Handle receiver(thread, NULL);
1075 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1076 bytecode == Bytecodes::_invokespecial) {
1077 ResourceMark rm(thread);
1078 methodHandle m (thread, last_frame.method());
1079 Bytecode_invoke call(m, last_frame.bci());
1080 Symbol* signature = call.signature();
1081 receiver = Handle(thread, last_frame.callee_receiver(signature));
1082
1083 assert(Universe::heap()->is_in_reserved_or_null(receiver()), "sanity check");
1084 assert(receiver.is_null() ||
1085 !Universe::heap()->is_in_reserved(receiver->klass()),
1086 "sanity check");
1087 }
1088
1089 // resolve method
1090 CallInfo info;
1091 constantPoolHandle pool(thread, last_frame.method()->constants());
1092
1093 {
1094 JvmtiHideSingleStepping jhss(thread);
1095 LinkResolver::resolve_invoke(info, receiver, pool,
1096 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1097 CHECK);
1098 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
1099 int retry_count = 0;
1100 while (info.resolved_method()->is_old()) {
1101 // It is very unlikely that method is redefined more than 100 times
1102 // in the middle of resolve. If it is looping here more than 100 times
1103 // means then there could be a bug here.
1104 guarantee((retry_count++ < 100),
1105 "Could not resolve to latest version of redefined method");
1106 // method is redefined in the middle of resolve so re-try.
1107 LinkResolver::resolve_invoke(info, receiver, pool,
1108 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1109 CHECK);
1110 }
1111 }
1112 } // end JvmtiHideSingleStepping
1113
1114 // check if link resolution caused cpCache to be updated
1115 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1116 if (cp_cache_entry->is_resolved(bytecode)) return;
1117
1118 #ifdef ASSERT
1119 if (bytecode == Bytecodes::_invokeinterface) {
1120 if (info.resolved_method()->method_holder() ==
1121 SystemDictionary::Object_klass()) {
1122 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1123 // (see also CallInfo::set_interface for details)
1124 assert(info.call_kind() == CallInfo::vtable_call ||
1125 info.call_kind() == CallInfo::direct_call, "");
1126 methodHandle rm = info.resolved_method();
1127 assert(rm->is_final() || info.has_vtable_index(),
1128 "should have been set already");
1129 } else if (!info.resolved_method()->has_itable_index()) {
1130 // Resolved something like CharSequence.toString. Use vtable not itable.
1131 assert(info.call_kind() != CallInfo::itable_call, "");
1132 } else {
1133 // Setup itable entry
1134 assert(info.call_kind() == CallInfo::itable_call, "");
1135 int index = info.resolved_method()->itable_index();
1136 assert(info.itable_index() == index, "");
1137 }
1138 } else if (bytecode == Bytecodes::_invokespecial) {
1139 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1140 } else {
1141 assert(info.call_kind() == CallInfo::direct_call ||
1142 info.call_kind() == CallInfo::vtable_call, "");
1143 }
1144 #endif
1145
1146 switch (info.call_kind()) {
1147 case CallInfo::direct_call: {
1148 // Get sender or sender's unsafe_anonymous_host, and only set cpCache entry to resolved if
1149 // it is not an interface. The receiver for invokespecial calls within interface
1150 // methods must be checked for every call.
1151 InstanceKlass* pool_holder = pool->pool_holder();
1152 InstanceKlass* sender = pool_holder->is_unsafe_anonymous() ?
1153 pool_holder->unsafe_anonymous_host() : pool_holder;
1154
1155 cp_cache_entry->set_direct_call(
1156 bytecode,
1157 info.resolved_method(),
1158 sender->is_interface(),
1159 pool_holder);
1160 break;
1161 }
1162 case CallInfo::vtable_call:
1163 cp_cache_entry->set_vtable_call(
1164 bytecode,
1165 info.resolved_method(),
1166 info.vtable_index());
1167 break;
1168 case CallInfo::itable_call:
1169 cp_cache_entry->set_itable_call(
1170 bytecode,
1171 info.resolved_klass(),
1172 info.resolved_method(),
1173 info.itable_index());
1174 break;
1175 default: ShouldNotReachHere();
1176 }
1177 }
1178
1179
1180 // First time execution: Resolve symbols, create a permanent MethodType object.
1181 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1182 Thread* THREAD = thread;
1183 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1184 LastFrameAccessor last_frame(thread);
1185
1186 // resolve method
1187 CallInfo info;
1188 constantPoolHandle pool(thread, last_frame.method()->constants());
1189 {
1190 JvmtiHideSingleStepping jhss(thread);
1191 LinkResolver::resolve_invoke(info, Handle(), pool,
1192 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1193 CHECK);
1194 } // end JvmtiHideSingleStepping
1195
1196 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1197 cp_cache_entry->set_method_handle(pool, info);
1198 }
1199
1200 // First time execution: Resolve symbols, create a permanent CallSite object.
1201 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1202 Thread* THREAD = thread;
1203 LastFrameAccessor last_frame(thread);
1204 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1205
1206 // resolve method
1207 CallInfo info;
1208 constantPoolHandle pool(thread, last_frame.method()->constants());
1209 int index = last_frame.get_index_u4(bytecode);
1210 {
1211 JvmtiHideSingleStepping jhss(thread);
1212 LinkResolver::resolve_invoke(info, Handle(), pool,
1213 index, bytecode, CHECK);
1214 } // end JvmtiHideSingleStepping
1215
1216 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1217 cp_cache_entry->set_dynamic_call(pool, info);
1218 }
1219
1220 // This function is the interface to the assembly code. It returns the resolved
1221 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1222 // This function will check for redefinition!
1223 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1224 switch (bytecode) {
1225 case Bytecodes::_getstatic:
1226 case Bytecodes::_putstatic:
1227 case Bytecodes::_getfield:
1228 case Bytecodes::_putfield:
1229 case Bytecodes::_withfield:
1230 resolve_get_put(thread, bytecode);
1231 break;
1232 case Bytecodes::_invokevirtual:
1233 case Bytecodes::_invokespecial:
1234 case Bytecodes::_invokestatic:
1235 case Bytecodes::_invokeinterface:
1236 resolve_invoke(thread, bytecode);
1237 break;
1238 case Bytecodes::_invokehandle:
1239 resolve_invokehandle(thread);
1240 break;
1241 case Bytecodes::_invokedynamic:
1242 resolve_invokedynamic(thread);
1243 break;
1244 default:
1245 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1246 break;
1247 }
1248 }
1249 IRT_END
1250
1251 //------------------------------------------------------------------------------------------------------------------------
1252 // Miscellaneous
1253
1254
1255 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1256 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1257 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1258 if (branch_bcp != NULL && nm != NULL) {
1259 // This was a successful request for an OSR nmethod. Because
1260 // frequency_counter_overflow_inner ends with a safepoint check,
1261 // nm could have been unloaded so look it up again. It's unsafe
1262 // to examine nm directly since it might have been freed and used
1263 // for something else.
1264 LastFrameAccessor last_frame(thread);
1265 Method* method = last_frame.method();
1266 int bci = method->bci_from(last_frame.bcp());
1267 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1268 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1269 if (nm != NULL && bs_nm != NULL) {
1270 // in case the transition passed a safepoint we need to barrier this again
1271 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1272 nm = NULL;
1273 }
1274 }
1275 }
1276 if (nm != NULL && thread->is_interp_only_mode()) {
1277 // Normally we never get an nm if is_interp_only_mode() is true, because
1278 // policy()->event has a check for this and won't compile the method when
1279 // true. However, it's possible for is_interp_only_mode() to become true
1280 // during the compilation. We don't want to return the nm in that case
1281 // because we want to continue to execute interpreted.
1282 nm = NULL;
1283 }
1284 #ifndef PRODUCT
1285 if (TraceOnStackReplacement) {
1286 if (nm != NULL) {
1287 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1288 nm->print();
1289 }
1290 }
1291 #endif
1292 return nm;
1293 }
1294
1295 IRT_ENTRY(nmethod*,
1296 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1297 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1298 // flag, in case this method triggers classloading which will call into Java.
1299 UnlockFlagSaver fs(thread);
1300
1301 LastFrameAccessor last_frame(thread);
1302 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1303 methodHandle method(thread, last_frame.method());
1304 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1305 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1306
1307 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1308 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1309 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1310
1311 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1312 if (osr_nm != NULL && bs_nm != NULL) {
1313 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1314 osr_nm = NULL;
1315 }
1316 }
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 = last_frame.monitor_end();
1329 kptr < last_frame.monitor_begin();
1330 kptr = last_frame.next_monitor(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 LastFrameAccessor last_frame(thread);
1356 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1357 methodHandle method(thread, last_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 LastFrameAccessor last_frame(thread);
1403 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1404 MethodData* h_mdo = last_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(last_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 last_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 LastFrameAccessor last_frame(thread);
1442 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1443 }
1444 IRT_END
1445
1446 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1447 ConstantPoolCacheEntry *cp_entry))
1448
1449 // check the access_flags for the field in the klass
1450
1451 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1452 int index = cp_entry->field_index();
1453 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1454
1455 bool is_static = (obj == NULL);
1456 HandleMark hm(thread);
1457
1458 Handle h_obj;
1459 if (!is_static) {
1460 // non-static field accessors have an object, but we need a handle
1461 h_obj = Handle(thread, obj);
1462 }
1463 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1464 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1465 LastFrameAccessor last_frame(thread);
1466 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1467 IRT_END
1468
1469 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1470 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1471
1472 Klass* k = cp_entry->f1_as_klass();
1473
1474 // check the access_flags for the field in the klass
1475 InstanceKlass* ik = InstanceKlass::cast(k);
1476 int index = cp_entry->field_index();
1477 // bail out if field modifications are not watched
1478 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1479
1480 char sig_type = '\0';
1481
1482 switch(cp_entry->flag_state()) {
1483 case btos: sig_type = 'B'; break;
1484 case ztos: sig_type = 'Z'; break;
1485 case ctos: sig_type = 'C'; break;
1486 case stos: sig_type = 'S'; break;
1487 case itos: sig_type = 'I'; break;
1488 case ftos: sig_type = 'F'; break;
1489 case atos: sig_type = 'L'; break;
1490 case ltos: sig_type = 'J'; break;
1491 case dtos: sig_type = 'D'; break;
1492 default: ShouldNotReachHere(); return;
1493 }
1494
1495 // Both Q-signatures and L-signatures are mapped to atos
1496 if (cp_entry->flag_state() == atos && ik->field_signature(index)->is_Q_signature()) {
1497 sig_type = 'Q';
1498 }
1499
1500 bool is_static = (obj == NULL);
1501
1502 HandleMark hm(thread);
1503 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1504 jvalue fvalue;
1505 #ifdef _LP64
1506 fvalue = *value;
1507 #else
1508 // Long/double values are stored unaligned and also noncontiguously with
1509 // tagged stacks. We can't just do a simple assignment even in the non-
1510 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1511 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1512 // We assume that the two halves of longs/doubles are stored in interpreter
1513 // stack slots in platform-endian order.
1514 jlong_accessor u;
1515 jint* newval = (jint*)value;
1516 u.words[0] = newval[0];
1517 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1518 fvalue.j = u.long_value;
1519 #endif // _LP64
1520
1521 Handle h_obj;
1522 if (!is_static) {
1523 // non-static field accessors have an object, but we need a handle
1524 h_obj = Handle(thread, obj);
1525 }
1526
1527 LastFrameAccessor last_frame(thread);
1528 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1529 fid, sig_type, &fvalue);
1530 IRT_END
1531
1532 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1533 LastFrameAccessor last_frame(thread);
1534 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1535 IRT_END
1536
1537
1538 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1539 LastFrameAccessor last_frame(thread);
1540 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1541 IRT_END
1542
1543 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1544 {
1545 return (Interpreter::contains(pc) ? 1 : 0);
1546 }
1547 IRT_END
1548
1549
1550 // Implementation of SignatureHandlerLibrary
1551
1552 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1553 // Dummy definition (else normalization method is defined in CPU
1554 // dependant code)
1555 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1556 return fingerprint;
1557 }
1558 #endif
1559
1560 address SignatureHandlerLibrary::set_handler_blob() {
1561 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1562 if (handler_blob == NULL) {
1563 return NULL;
1564 }
1565 address handler = handler_blob->code_begin();
1566 _handler_blob = handler_blob;
1567 _handler = handler;
1568 return handler;
1569 }
1570
1571 void SignatureHandlerLibrary::initialize() {
1572 if (_fingerprints != NULL) {
1573 return;
1574 }
1575 if (set_handler_blob() == NULL) {
1576 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1577 }
1578
1579 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1580 SignatureHandlerLibrary::buffer_size);
1581 _buffer = bb->code_begin();
1582
1583 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1584 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1585 }
1586
1587 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1588 address handler = _handler;
1589 int insts_size = buffer->pure_insts_size();
1590 if (handler + insts_size > _handler_blob->code_end()) {
1591 // get a new handler blob
1592 handler = set_handler_blob();
1593 }
1594 if (handler != NULL) {
1595 memcpy(handler, buffer->insts_begin(), insts_size);
1596 pd_set_handler(handler);
1597 ICache::invalidate_range(handler, insts_size);
1598 _handler = handler + insts_size;
1599 }
1600 return handler;
1601 }
1602
1603 void SignatureHandlerLibrary::add(const methodHandle& method) {
1604 if (method->signature_handler() == NULL) {
1605 // use slow signature handler if we can't do better
1606 int handler_index = -1;
1607 // check if we can use customized (fast) signature handler
1608 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1609 // use customized signature handler
1610 MutexLocker mu(SignatureHandlerLibrary_lock);
1611 // make sure data structure is initialized
1612 initialize();
1613 // lookup method signature's fingerprint
1614 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1615 // allow CPU dependant code to optimize the fingerprints for the fast handler
1616 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1617 handler_index = _fingerprints->find(fingerprint);
1618 // create handler if necessary
1619 if (handler_index < 0) {
1620 ResourceMark rm;
1621 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1622 CodeBuffer buffer((address)(_buffer + align_offset),
1623 SignatureHandlerLibrary::buffer_size - align_offset);
1624 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1625 // copy into code heap
1626 address handler = set_handler(&buffer);
1627 if (handler == NULL) {
1628 // use slow signature handler (without memorizing it in the fingerprints)
1629 } else {
1630 // debugging suppport
1631 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1632 ttyLocker ttyl;
1633 tty->cr();
1634 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1635 _handlers->length(),
1636 (method->is_static() ? "static" : "receiver"),
1637 method->name_and_sig_as_C_string(),
1638 fingerprint,
1639 buffer.insts_size());
1640 if (buffer.insts_size() > 0) {
1641 Disassembler::decode(handler, handler + buffer.insts_size());
1642 }
1643 #ifndef PRODUCT
1644 address rh_begin = Interpreter::result_handler(method()->result_type());
1645 if (CodeCache::contains(rh_begin)) {
1646 // else it might be special platform dependent values
1647 tty->print_cr(" --- associated result handler ---");
1648 address rh_end = rh_begin;
1649 while (*(int*)rh_end != 0) {
1650 rh_end += sizeof(int);
1651 }
1652 Disassembler::decode(rh_begin, rh_end);
1653 } else {
1654 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1655 }
1656 #endif
1657 }
1658 // add handler to library
1659 _fingerprints->append(fingerprint);
1660 _handlers->append(handler);
1661 // set handler index
1662 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1663 handler_index = _fingerprints->length() - 1;
1664 }
1665 }
1666 // Set handler under SignatureHandlerLibrary_lock
1667 if (handler_index < 0) {
1668 // use generic signature handler
1669 method->set_signature_handler(Interpreter::slow_signature_handler());
1670 } else {
1671 // set handler
1672 method->set_signature_handler(_handlers->at(handler_index));
1673 }
1674 } else {
1675 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1676 // use generic signature handler
1677 method->set_signature_handler(Interpreter::slow_signature_handler());
1678 }
1679 }
1680 #ifdef ASSERT
1681 int handler_index = -1;
1682 int fingerprint_index = -2;
1683 {
1684 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1685 // in any way if accessed from multiple threads. To avoid races with another
1686 // thread which may change the arrays in the above, mutex protected block, we
1687 // have to protect this read access here with the same mutex as well!
1688 MutexLocker mu(SignatureHandlerLibrary_lock);
1689 if (_handlers != NULL) {
1690 handler_index = _handlers->find(method->signature_handler());
1691 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1692 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1693 fingerprint_index = _fingerprints->find(fingerprint);
1694 }
1695 }
1696 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1697 handler_index == fingerprint_index, "sanity check");
1698 #endif // ASSERT
1699 }
1700
1701 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1702 int handler_index = -1;
1703 // use customized signature handler
1704 MutexLocker mu(SignatureHandlerLibrary_lock);
1705 // make sure data structure is initialized
1706 initialize();
1707 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1708 handler_index = _fingerprints->find(fingerprint);
1709 // create handler if necessary
1710 if (handler_index < 0) {
1711 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1712 tty->cr();
1713 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1714 _handlers->length(),
1715 p2i(handler),
1716 fingerprint);
1717 }
1718 _fingerprints->append(fingerprint);
1719 _handlers->append(handler);
1720 } else {
1721 if (PrintSignatureHandlers) {
1722 tty->cr();
1723 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1724 _handlers->length(),
1725 fingerprint,
1726 p2i(_handlers->at(handler_index)),
1727 p2i(handler));
1728 }
1729 }
1730 }
1731
1732
1733 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1734 address SignatureHandlerLibrary::_handler = NULL;
1735 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1736 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1737 address SignatureHandlerLibrary::_buffer = NULL;
1738
1739
1740 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1741 methodHandle m(thread, method);
1742 assert(m->is_native(), "sanity check");
1743 // lookup native function entry point if it doesn't exist
1744 bool in_base_library;
1745 if (!m->has_native_function()) {
1746 NativeLookup::lookup(m, in_base_library, CHECK);
1747 }
1748 // make sure signature handler is installed
1749 SignatureHandlerLibrary::add(m);
1750 // The interpreter entry point checks the signature handler first,
1751 // before trying to fetch the native entry point and klass mirror.
1752 // We must set the signature handler last, so that multiple processors
1753 // preparing the same method will be sure to see non-null entry & mirror.
1754 IRT_END
1755
1756 #if defined(IA32) || defined(AMD64) || defined(ARM)
1757 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1758 if (src_address == dest_address) {
1759 return;
1760 }
1761 ResetNoHandleMark rnm; // In a LEAF entry.
1762 HandleMark hm;
1763 ResourceMark rm;
1764 LastFrameAccessor last_frame(thread);
1765 assert(last_frame.is_interpreted_frame(), "");
1766 jint bci = last_frame.bci();
1767 methodHandle mh(thread, last_frame.method());
1768 Bytecode_invoke invoke(mh, bci);
1769 ArgumentSizeComputer asc(invoke.signature());
1770 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1771 Copy::conjoint_jbytes(src_address, dest_address,
1772 size_of_arguments * Interpreter::stackElementSize);
1773 IRT_END
1774 #endif
1775
1776 #if INCLUDE_JVMTI
1777 // This is a support of the JVMTI PopFrame interface.
1778 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1779 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1780 // The member_name argument is a saved reference (in local#0) to the member_name.
1781 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1782 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1783 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1784 Method* method, address bcp))
1785 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1786 if (code != Bytecodes::_invokestatic) {
1787 return;
1788 }
1789 ConstantPool* cpool = method->constants();
1790 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1791 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1792 Symbol* mname = cpool->name_ref_at(cp_index);
1793
1794 if (MethodHandles::has_member_arg(cname, mname)) {
1795 oop member_name_oop = (oop) member_name;
1796 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1797 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1798 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1799 }
1800 thread->set_vm_result(member_name_oop);
1801 } else {
1802 thread->set_vm_result(NULL);
1803 }
1804 IRT_END
1805 #endif // INCLUDE_JVMTI
1806
1807 #ifndef PRODUCT
1808 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1809 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1810 // The generated code still uses call_VM because that will set up the frame pointer for
1811 // bcp and method.
1812 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1813 LastFrameAccessor last_frame(thread);
1814 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1815 methodHandle mh(thread, last_frame.method());
1816 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1817 return preserve_this_value;
1818 IRT_END
1819 #endif // !PRODUCT