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