1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/disassembler.hpp"
32 #include "gc/shared/collectedHeap.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "interpreter/interpreterRuntime.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "interpreter/templateTable.hpp"
37 #include "logging/log.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "oops/constantPool.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/methodData.hpp"
44 #include "oops/objArrayKlass.hpp"
45 #include "oops/objArrayOop.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "oops/symbol.hpp"
48 #include "oops/valueKlass.hpp"
49 #include "oops/valueArrayKlass.hpp"
50 #include "oops/valueArrayOop.hpp"
51 #include "prims/jvmtiExport.hpp"
52 #include "prims/nativeLookup.hpp"
53 #include "runtime/atomic.hpp"
54 #include "runtime/biasedLocking.hpp"
55 #include "runtime/compilationPolicy.hpp"
56 #include "runtime/deoptimization.hpp"
57 #include "runtime/fieldDescriptor.hpp"
58 #include "runtime/handles.inline.hpp"
59 #include "runtime/icache.hpp"
60 #include "runtime/interfaceSupport.hpp"
61 #include "runtime/java.hpp"
62 #include "runtime/jfieldIDWorkaround.hpp"
63 #include "runtime/osThread.hpp"
64 #include "runtime/sharedRuntime.hpp"
65 #include "runtime/stubRoutines.hpp"
66 #include "runtime/synchronizer.hpp"
67 #include "runtime/threadCritical.hpp"
68 #include "utilities/events.hpp"
69 #include "utilities/globalDefinitions.hpp"
70 #ifdef COMPILER2
71 #include "opto/runtime.hpp"
72 #endif
73
74 class UnlockFlagSaver {
75 private:
76 JavaThread* _thread;
77 bool _do_not_unlock;
78 public:
79 UnlockFlagSaver(JavaThread* t) {
80 _thread = t;
81 _do_not_unlock = t->do_not_unlock_if_synchronized();
82 t->set_do_not_unlock_if_synchronized(false);
83 }
84 ~UnlockFlagSaver() {
85 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
86 }
87 };
88
89 //------------------------------------------------------------------------------------------------------------------------
90 // State accessors
91
92 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
93 last_frame(thread).interpreter_frame_set_bcp(bcp);
94 if (ProfileInterpreter) {
95 // ProfileTraps uses MDOs independently of ProfileInterpreter.
96 // That is why we must check both ProfileInterpreter and mdo != NULL.
97 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
98 if (mdo != NULL) {
99 NEEDS_CLEANUP;
100 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
101 }
102 }
103 }
104
105 //------------------------------------------------------------------------------------------------------------------------
106 // Constants
107
108
109 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
110 // access constant pool
111 ConstantPool* pool = method(thread)->constants();
112 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
113 constantTag tag = pool->tag_at(index);
114
115 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
116 Klass* klass = pool->klass_at(index, CHECK);
117 oop java_class = klass->java_mirror();
118 thread->set_vm_result(java_class);
119 IRT_END
120
121 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
122 assert(bytecode == Bytecodes::_fast_aldc ||
123 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
124 ResourceMark rm(thread);
125 methodHandle m (thread, method(thread));
126 Bytecode_loadconstant ldc(m, bci(thread));
127 oop result = ldc.resolve_constant(CHECK);
128 #ifdef ASSERT
129 {
130 // The bytecode wrappers aren't GC-safe so construct a new one
131 Bytecode_loadconstant ldc2(m, bci(thread));
132 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
133 assert(result == coop, "expected result for assembly code");
134 }
135 #endif
136 thread->set_vm_result(result);
137 }
138 IRT_END
139
140
141 //------------------------------------------------------------------------------------------------------------------------
142 // Allocation
143
144 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
145 Klass* k = pool->klass_at(index, CHECK);
146 InstanceKlass* klass = InstanceKlass::cast(k);
147
148 // Make sure we are not instantiating an abstract klass
149 klass->check_valid_for_instantiation(true, CHECK);
150
151 // Make sure klass is initialized
152 klass->initialize(CHECK);
153
154 // At this point the class may not be fully initialized
155 // because of recursive initialization. If it is fully
156 // initialized & has_finalized is not set, we rewrite
157 // it into its fast version (Note: no locking is needed
158 // here since this is an atomic byte write and can be
159 // done more than once).
160 //
161 // Note: In case of classes with has_finalized we don't
162 // rewrite since that saves us an extra check in
163 // the fast version which then would call the
164 // slow version anyway (and do a call back into
165 // Java).
166 // If we have a breakpoint, then we don't rewrite
167 // because the _breakpoint bytecode would be lost.
168 oop obj = klass->allocate_instance(CHECK);
169 thread->set_vm_result(obj);
170 IRT_END
171
172 void copy_primitive_argument(intptr_t* addr, Handle instance, int offset, BasicType type) {
173 switch (type) {
174 case T_BOOLEAN:
175 instance()->bool_field_put(offset, (jboolean)*((int*)addr));
176 break;
177 case T_CHAR:
178 instance()->char_field_put(offset, (jchar) *((int*)addr));
179 break;
180 case T_FLOAT:
181 instance()->float_field_put(offset, (jfloat)*((float*)addr));
182 break;
183 case T_DOUBLE:
184 instance()->double_field_put(offset, (jdouble)*((double*)addr));
185 break;
186 case T_BYTE:
187 instance()->byte_field_put(offset, (jbyte)*((int*)addr));
188 break;
189 case T_SHORT:
190 instance()->short_field_put(offset, (jshort)*((int*)addr));
191 break;
192 case T_INT:
193 instance()->int_field_put(offset, (jint)*((int*)addr));
194 break;
195 case T_LONG:
196 instance()->long_field_put(offset, (jlong)*((long*)addr)); // Is it correct on 32 and 64 bits?
197 break;
198 case T_OBJECT:
199 case T_ARRAY:
200 case T_VALUETYPE:
201 fatal("Should not be handled with this method");
202 break;
203 default:
204 fatal("Unsupported BasicType");
205 }
206 }
207
208 IRT_ENTRY(void, InterpreterRuntime::vdefault(JavaThread* thread, ConstantPool* pool, int index))
209 // Getting the ValueKlass
210 Klass* k = pool->klass_at(index, CHECK);
211 assert(k->is_value(), "vdefault argument must be the value type class");
212 ValueKlass* vklass = ValueKlass::cast(k);
213
214 vklass->initialize(THREAD);
215
216 // Creating value
217 instanceOop value = vklass->allocate_instance(CHECK);
218 Handle value_h = Handle(THREAD, value);
219
220 // Zeroing, already performed by allocate_instance() when allocating in the Java Heap
221 // Might need to be performed manually for off-heap allocations
222 // memset(((char*)(oopDesc*)value) + vklass_h->first_field_offset(), 0,
223 // vklass_h->size_helper() * wordSize - vklass_h->first_field_offset());
224
225 thread->set_vm_result(value_h());
226 IRT_END
227
228 IRT_ENTRY(int, InterpreterRuntime::vwithfield(JavaThread* thread, ConstantPoolCache* cp_cache))
229 // Getting the ValueKlass
230 int index = ConstantPool::decode_cpcache_index(get_index_u2_cpcache(thread, Bytecodes::_vwithfield));
231 ConstantPoolCacheEntry* cp_entry = cp_cache->entry_at(index);
232 assert(cp_entry->is_resolved(Bytecodes::_vwithfield), "Should have been resolved");
233 Klass* klass = cp_entry->f1_as_klass();
234 assert(klass->is_value(), "vwithfield only applies to value types");
235 ValueKlass* vklass = ValueKlass::cast(klass);
236
237 // Getting Field information
238 int offset = cp_entry->f2_as_index();
239 fieldDescriptor fd;
240 vklass->find_field_from_offset(offset, false, &fd);
241 Symbol* field_signature = fd.signature();
242 ResourceMark rm(THREAD);
243 const char* signature = (const char *) field_signature->as_utf8();
244 BasicType field_type = char2type(signature[0]);
245
246 // Getting old value
247 frame f = last_frame(thread);
248 jint tos_idx = f.interpreter_frame_expression_stack_size() - 1;
249 int vt_offset = type2size[field_type];
250 oop old_value = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx - vt_offset);
251 assert(old_value != NULL && old_value->is_oop() && old_value->is_value(),"Verifying receiver");
252 Handle old_value_h(THREAD, old_value);
253
254 // Creating new value by copying the one passed in argument
255 instanceOop new_value = vklass->allocate_instance(CHECK_0);
256 Handle new_value_h = Handle(THREAD, new_value);
257 int first_offset = vklass->first_field_offset();
258 vklass->value_store(((char*)(oopDesc*)old_value_h()) + first_offset,
259 ((char*)(oopDesc*)new_value_h()) + first_offset, true, false);
260
261 // Updating the field specified in arguments
262 if (field_type == T_OBJECT || field_type == T_ARRAY) {
263 oop aoop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
264 assert(aoop == NULL || (aoop->is_oop() && (!aoop->is_value())),"argument must be a reference type");
265 new_value_h()->obj_field_put(fd.offset(), aoop);
266 } else if (field_type == T_VALUETYPE) {
267 Klass* field_k = vklass->get_value_field_klass(fd.index());
268 ValueKlass* field_vk = ValueKlass::cast(field_k);
269 oop vt_oop = *(oop*)f.interpreter_frame_expression_stack_at(tos_idx);
270 assert(vt_oop != NULL && vt_oop->is_oop() && vt_oop->is_value(),"argument must be a value type");
271 assert(field_vk == vt_oop->klass(), "Must match");
272 field_vk->value_store(((char*)(oopDesc*)vt_oop + field_vk->first_field_offset()),
273 ((char*)(oopDesc*)new_value_h()) + fd.offset(), true, false);
274 } else {
275 intptr_t* addr = f.interpreter_frame_expression_stack_at(tos_idx);
276 copy_primitive_argument(addr, new_value_h, fd.offset(), field_type);
277 }
278
279 // returning result
280 thread->set_vm_result(new_value_h());
281 return (type2size[field_type] + type2size[T_VALUETYPE]) * AbstractInterpreter::stackElementSize;
282 IRT_END
283
284 IRT_ENTRY(void, InterpreterRuntime::vbox(JavaThread* thread, ConstantPool* pool, int index, oopDesc* value))
285 if (value == NULL) {
286 THROW(vmSymbols::java_lang_NullPointerException());
287 }
288
289 // Since the verifier is probably disabled, a few extra type check
290 Klass* target_klass = pool->klass_at(index, CHECK);
291 if (target_klass->is_value()) {
292 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vbox target is value type");
293 }
294 Klass* klass = value->klass();
295 if (!klass->is_value()) {
296 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vbox not from value type");
297 }
298 ValueKlass* vtklass = ValueKlass::cast(klass);
299 if (vtklass->derive_value_type_klass() != target_klass) {
300 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vbox target is not derive value type box");
301 }
302
303 oop boxed = vtklass->derive_value_type_copy(Handle(THREAD, value),
304 InstanceKlass::cast(target_klass),
305 CHECK);
306 thread->set_vm_result(boxed);
307 IRT_END
308
309 IRT_ENTRY(void, InterpreterRuntime::vunbox(JavaThread* thread, ConstantPool* pool, int index, oopDesc* obj))
310 if (obj == NULL) {
311 THROW(vmSymbols::java_lang_NullPointerException());
312 }
313 Klass* target_klass = pool->klass_at(index, CHECK);
314 if (!target_klass->is_value()) {
315 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vunbox target is not value type");
316 }
317 Klass* klass = obj->klass();
318 if ((!klass->is_instance_klass()) || klass->is_value()) {
319 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vunbox source is not an instance");
320 }
321 InstanceKlass* dvtklass = InstanceKlass::cast(klass)->derive_value_type_klass();
322 if (dvtklass != target_klass) {
323 THROW_MSG(vmSymbols::java_lang_ClassCastException(), "vunbox target is not derive value type");
324 }
325 oop value = ValueKlass::cast(dvtklass)->derive_value_type_copy(Handle(THREAD, obj),
326 InstanceKlass::cast(target_klass),
327 CHECK);
328 thread->set_vm_result(value);
329 IRT_END
330
331 IRT_ENTRY(void, InterpreterRuntime::qgetfield(JavaThread* thread, oopDesc* value, int offset))
332 Handle value_h(THREAD, value);
333 InstanceKlass* klass = InstanceKlass::cast(value->klass());
334
335 fieldDescriptor fd;
336 klass->find_field_from_offset(offset, false, &fd);
337 Klass* field_k = klass->get_value_field_klass(fd.index());
338 ValueKlass* field_vklass = ValueKlass::cast(field_k);
339 // allocate instance
340 instanceOop res = field_vklass->allocate_instance(CHECK);
341 // copy value
342 int size = field_vklass->layout_helper_size_in_bytes(field_vklass->layout_helper());
343 field_vklass->value_store(((char*)(oopDesc*)value_h()) + offset,
344 ((char*)(oopDesc*)res) + field_vklass->first_field_offset(),true, false);
345 thread->set_vm_result(res);
346 IRT_END
347
348 IRT_ENTRY(void, InterpreterRuntime::qputfield(JavaThread* thread, oopDesc* obj, oopDesc* value, int offset))
349 Handle value_h(THREAD, value);
350 Handle obj_h(THREAD, obj);
351
352 InstanceKlass* klass_h = InstanceKlass::cast(obj->klass());
353 ValueKlass* field_vklass = ValueKlass::cast(value->klass());
354
355 // copy value
356 int size = field_vklass->layout_helper_size_in_bytes(field_vklass->layout_helper());
357 field_vklass->value_store(((char*)(oopDesc*)value_h()) + field_vklass->first_field_offset(),
358 ((char*)(oopDesc*)obj_h()) + offset, true, false);
359 IRT_END
360
361 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
362 oop obj = oopFactory::new_typeArray(type, size, CHECK);
363 thread->set_vm_result(obj);
364 IRT_END
365
366
367 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
368 Klass* klass = pool->klass_at(index, CHECK);
369 if (klass->is_value()) { // Logically creates elements, ensure klass init
370 klass->initialize(CHECK);
371 }
372 arrayOop obj = oopFactory::new_array(klass, size, CHECK);
373 thread->set_vm_result(obj);
374 IRT_END
375
376 IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index))
377 Klass* klass = array->klass();
378 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
379
380 if (klass->is_objArray_klass()) {
381 thread->set_vm_result(((objArrayOop) array)->obj_at(index));
382 }
383 else {
384 // Early prototype: we don't have valorind support...just allocate aref and copy
385 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
386 ValueKlass* vklass = vaklass->element_klass();
387 arrayHandle ah(THREAD, array);
388 instanceOop value_holder = vklass->allocate_instance(CHECK);
389 void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper());
390 vklass->value_store(src, vklass->data_for_oop(value_holder),
391 vaklass->element_value_store_size(), true, true);
392 thread->set_vm_result(value_holder);
393 }
394 IRT_END
395
396 IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, arrayOopDesc* array, int index, void* val))
397 Klass* klass = array->klass();
398 assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop");
399 if (klass->is_objArray_klass()) {
400 ((objArrayOop) array)->obj_at_put(index, (oop)val);
401 }
402 else {
403 valueArrayOop varray = (valueArrayOop)array;
404 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
405 ValueKlass* vklass = vaklass->element_klass();
406 const int lh = vaklass->layout_helper();
407 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
408 vaklass->element_value_store_size(), true, false);
409 }
410 IRT_END
411
412 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
413 // We may want to pass in more arguments - could make this slightly faster
414 ConstantPool* constants = method(thread)->constants();
415 int i = get_index_u2(thread, Bytecodes::_multianewarray);
416 Klass* klass = constants->klass_at(i, CHECK);
417 int nof_dims = number_of_dimensions(thread);
418 assert(klass->is_klass(), "not a class");
419 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
420
421 if (klass->is_value()) { // Logically creates elements, ensure klass init
422 klass->initialize(CHECK);
423 }
424
425 // We must create an array of jints to pass to multi_allocate.
426 ResourceMark rm(thread);
427 const int small_dims = 10;
428 jint dim_array[small_dims];
429 jint *dims = &dim_array[0];
430 if (nof_dims > small_dims) {
431 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
432 }
433 for (int index = 0; index < nof_dims; index++) {
434 // offset from first_size_address is addressed as local[index]
435 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
436 dims[index] = first_size_address[n];
437 }
438 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
439 thread->set_vm_result(obj);
440 IRT_END
441
442
443 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
444 assert(obj->is_oop(), "must be a valid oop");
445 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
446 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
447 IRT_END
448
449
450 // Quicken instance-of and check-cast bytecodes
451 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
452 // Force resolving; quicken the bytecode
453 int which = get_index_u2(thread, Bytecodes::_checkcast);
454 ConstantPool* cpool = method(thread)->constants();
455 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
456 // program we might have seen an unquick'd bytecode in the interpreter but have another
457 // thread quicken the bytecode before we get here.
458 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
459 Klass* klass = cpool->klass_at(which, CHECK);
460 thread->set_vm_result_2(klass);
461 IRT_END
462
463
464 //------------------------------------------------------------------------------------------------------------------------
465 // Exceptions
466
467 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
468 methodHandle trap_method, int trap_bci, TRAPS) {
469 if (trap_method.not_null()) {
470 MethodData* trap_mdo = trap_method->method_data();
471 if (trap_mdo == NULL) {
472 Method::build_interpreter_method_data(trap_method, THREAD);
473 if (HAS_PENDING_EXCEPTION) {
474 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
475 "we expect only an OOM error here");
476 CLEAR_PENDING_EXCEPTION;
477 }
478 trap_mdo = trap_method->method_data();
479 // and fall through...
480 }
481 if (trap_mdo != NULL) {
482 // Update per-method count of trap events. The interpreter
483 // is updating the MDO to simulate the effect of compiler traps.
484 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
485 }
486 }
487 }
488
489 // Assume the compiler is (or will be) interested in this event.
490 // If necessary, create an MDO to hold the information, and record it.
491 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
492 assert(ProfileTraps, "call me only if profiling");
493 methodHandle trap_method(thread, method(thread));
494 int trap_bci = trap_method->bci_from(bcp(thread));
495 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
496 }
497
498 #ifdef CC_INTERP
499 // As legacy note_trap, but we have more arguments.
500 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
501 methodHandle trap_method(method);
502 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
503 IRT_END
504
505 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
506 // for each exception.
507 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
508 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
509 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
510 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
511 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
512 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
513 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
514 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
515 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
516 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
517 #endif // CC_INTERP
518
519
520 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
521 // get klass
522 InstanceKlass* klass = InstanceKlass::cast(k);
523 assert(klass->is_initialized(),
524 "this klass should have been initialized during VM initialization");
525 // create instance - do not call constructor since we may have no
526 // (java) stack space left (should assert constructor is empty)
527 Handle exception;
528 oop exception_oop = klass->allocate_instance(CHECK_(exception));
529 exception = Handle(THREAD, exception_oop);
530 if (StackTraceInThrowable) {
531 java_lang_Throwable::fill_in_stack_trace(exception);
532 }
533 return exception;
534 }
535
536 // Special handling for stack overflow: since we don't have any (java) stack
537 // space left we use the pre-allocated & pre-initialized StackOverflowError
538 // klass to create an stack overflow error instance. We do not call its
539 // constructor for the same reason (it is empty, anyway).
540 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
541 Handle exception = get_preinitialized_exception(
542 SystemDictionary::StackOverflowError_klass(),
543 CHECK);
544 // Increment counter for hs_err file reporting
545 Atomic::inc(&Exceptions::_stack_overflow_errors);
546 THROW_HANDLE(exception);
547 IRT_END
548
549 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
550 Handle exception = get_preinitialized_exception(
551 SystemDictionary::StackOverflowError_klass(),
552 CHECK);
553 java_lang_Throwable::set_message(exception(),
554 Universe::delayed_stack_overflow_error_message());
555 // Increment counter for hs_err file reporting
556 Atomic::inc(&Exceptions::_stack_overflow_errors);
557 THROW_HANDLE(exception);
558 IRT_END
559
560 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
561 // lookup exception klass
562 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
563 if (ProfileTraps) {
564 if (s == vmSymbols::java_lang_ArithmeticException()) {
565 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
566 } else if (s == vmSymbols::java_lang_NullPointerException()) {
567 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
568 }
569 }
570 // create exception
571 Handle exception = Exceptions::new_exception(thread, s, message);
572 thread->set_vm_result(exception());
573 IRT_END
574
575
576 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
577 ResourceMark rm(thread);
578 const char* klass_name = obj->klass()->external_name();
579 // lookup exception klass
580 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
581 if (ProfileTraps) {
582 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
583 }
584 // create exception, with klass name as detail message
585 Handle exception = Exceptions::new_exception(thread, s, klass_name);
586 thread->set_vm_result(exception());
587 IRT_END
588
589
590 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
591 char message[jintAsStringSize];
592 // lookup exception klass
593 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
594 if (ProfileTraps) {
595 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
596 }
597 // create exception
598 sprintf(message, "%d", index);
599 THROW_MSG(s, message);
600 IRT_END
601
602 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
603 JavaThread* thread, oopDesc* obj))
604
605 ResourceMark rm(thread);
606 char* message = SharedRuntime::generate_class_cast_message(
607 thread, obj->klass());
608
609 if (ProfileTraps) {
610 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
611 }
612
613 // create exception
614 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
615 IRT_END
616
617 // exception_handler_for_exception(...) returns the continuation address,
618 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
619 // The exception oop is returned to make sure it is preserved over GC (it
620 // is only on the stack if the exception was thrown explicitly via athrow).
621 // During this operation, the expression stack contains the values for the
622 // bci where the exception happened. If the exception was propagated back
623 // from a call, the expression stack contains the values for the bci at the
624 // invoke w/o arguments (i.e., as if one were inside the call).
625 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
626
627 Handle h_exception(thread, exception);
628 methodHandle h_method (thread, method(thread));
629 constantPoolHandle h_constants(thread, h_method->constants());
630 bool should_repeat;
631 int handler_bci;
632 int current_bci = bci(thread);
633
634 if (thread->frames_to_pop_failed_realloc() > 0) {
635 // Allocation of scalar replaced object used in this frame
636 // failed. Unconditionally pop the frame.
637 thread->dec_frames_to_pop_failed_realloc();
638 thread->set_vm_result(h_exception());
639 // If the method is synchronized we already unlocked the monitor
640 // during deoptimization so the interpreter needs to skip it when
641 // the frame is popped.
642 thread->set_do_not_unlock_if_synchronized(true);
643 #ifdef CC_INTERP
644 return (address) -1;
645 #else
646 return Interpreter::remove_activation_entry();
647 #endif
648 }
649
650 // Need to do this check first since when _do_not_unlock_if_synchronized
651 // is set, we don't want to trigger any classloading which may make calls
652 // into java, or surprisingly find a matching exception handler for bci 0
653 // since at this moment the method hasn't been "officially" entered yet.
654 if (thread->do_not_unlock_if_synchronized()) {
655 ResourceMark rm;
656 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
657 thread->set_vm_result(exception);
658 #ifdef CC_INTERP
659 return (address) -1;
660 #else
661 return Interpreter::remove_activation_entry();
662 #endif
663 }
664
665 do {
666 should_repeat = false;
667
668 // assertions
669 #ifdef ASSERT
670 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
671 assert(h_exception->is_oop(), "just checking");
672 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
673 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
674 if (ExitVMOnVerifyError) vm_exit(-1);
675 ShouldNotReachHere();
676 }
677 #endif
678
679 // tracing
680 if (log_is_enabled(Info, exceptions)) {
681 ResourceMark rm(thread);
682 stringStream tempst;
683 tempst.print("interpreter method <%s>\n"
684 " at bci %d for thread " INTPTR_FORMAT,
685 h_method->print_value_string(), current_bci, p2i(thread));
686 Exceptions::log_exception(h_exception, tempst);
687 }
688 // Don't go paging in something which won't be used.
689 // else if (extable->length() == 0) {
690 // // disabled for now - interpreter is not using shortcut yet
691 // // (shortcut is not to call runtime if we have no exception handlers)
692 // // warning("performance bug: should not call runtime if method has no exception handlers");
693 // }
694 // for AbortVMOnException flag
695 Exceptions::debug_check_abort(h_exception);
696
697 // exception handler lookup
698 Klass* klass = h_exception->klass();
699 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
700 if (HAS_PENDING_EXCEPTION) {
701 // We threw an exception while trying to find the exception handler.
702 // Transfer the new exception to the exception handle which will
703 // be set into thread local storage, and do another lookup for an
704 // exception handler for this exception, this time starting at the
705 // BCI of the exception handler which caused the exception to be
706 // thrown (bug 4307310).
707 h_exception = Handle(THREAD, PENDING_EXCEPTION);
708 CLEAR_PENDING_EXCEPTION;
709 if (handler_bci >= 0) {
710 current_bci = handler_bci;
711 should_repeat = true;
712 }
713 }
714 } while (should_repeat == true);
715
716 #if INCLUDE_JVMCI
717 if (EnableJVMCI && h_method->method_data() != NULL) {
718 ResourceMark rm(thread);
719 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
720 if (pdata != NULL && pdata->is_BitData()) {
721 BitData* bit_data = (BitData*) pdata;
722 bit_data->set_exception_seen();
723 }
724 }
725 #endif
726
727 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
728 // time throw or a stack unwinding throw and accordingly notify the debugger
729 if (JvmtiExport::can_post_on_exceptions()) {
730 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
731 }
732
733 #ifdef CC_INTERP
734 address continuation = (address)(intptr_t) handler_bci;
735 #else
736 address continuation = NULL;
737 #endif
738 address handler_pc = NULL;
739 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
740 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
741 // handler in this method, or (b) after a stack overflow there is not yet
742 // enough stack space available to reprotect the stack.
743 #ifndef CC_INTERP
744 continuation = Interpreter::remove_activation_entry();
745 #endif
746 #if COMPILER2_OR_JVMCI
747 // Count this for compilation purposes
748 h_method->interpreter_throwout_increment(THREAD);
749 #endif
750 } else {
751 // handler in this method => change bci/bcp to handler bci/bcp and continue there
752 handler_pc = h_method->code_base() + handler_bci;
753 #ifndef CC_INTERP
754 set_bcp_and_mdp(handler_pc, thread);
755 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
756 #endif
757 }
758 // notify debugger of an exception catch
759 // (this is good for exceptions caught in native methods as well)
760 if (JvmtiExport::can_post_on_exceptions()) {
761 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
762 }
763
764 thread->set_vm_result(h_exception());
765 return continuation;
766 IRT_END
767
768
769 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
770 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
771 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
772 IRT_END
773
774
775 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
776 THROW(vmSymbols::java_lang_AbstractMethodError());
777 IRT_END
778
779
780 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
781 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
782 IRT_END
783
784
785 //------------------------------------------------------------------------------------------------------------------------
786 // Fields
787 //
788
789 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
790 Thread* THREAD = thread;
791 // resolve field
792 fieldDescriptor info;
793 constantPoolHandle pool(thread, method(thread)->constants());
794 methodHandle m(thread, method(thread));
795 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
796 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_vwithfield);
797 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
798 bool is_value = (bytecode == Bytecodes::_vgetfield || bytecode == Bytecodes::_vwithfield);
799
800 {
801 JvmtiHideSingleStepping jhss(thread);
802 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
803 m, bytecode, CHECK);
804 } // end JvmtiHideSingleStepping
805
806 // check if link resolution caused cpCache to be updated
807 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
808 if (cp_cache_entry->is_resolved(bytecode)) return;
809
810 // compute auxiliary field attributes
811 TosState state = as_TosState(info.field_type());
812
813 // Resolution of put instructions on final fields is delayed. That is required so that
814 // exceptions are thrown at the correct place (when the instruction is actually invoked).
815 // If we do not resolve an instruction in the current pass, leaving the put_code
816 // set to zero will cause the next put instruction to the same field to reresolve.
817
818 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
819 // to final instance fields with updates originating from a method different than <init>)
820 // is inhibited. A putfield instruction targeting an instance final field must throw
821 // an IllegalAccessError if the instruction is not in an instance
822 // initializer method <init>. If resolution were not inhibited, a putfield
823 // in an initializer method could be resolved in the initializer. Subsequent
824 // putfield instructions to the same field would then use cached information.
825 // As a result, those instructions would not pass through the VM. That is,
826 // checks in resolve_field_access() would not be executed for those instructions
827 // and the required IllegalAccessError would not be thrown.
828 //
829 // Also, we need to delay resolving getstatic and putstatic instructions until the
830 // class is initialized. This is required so that access to the static
831 // field will call the initialization function every time until the class
832 // is completely initialized ala. in 2.17.5 in JVM Specification.
833 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
834 bool uninitialized_static = is_static && !klass->is_initialized();
835 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
836 info.has_initialized_final_update();
837 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
838
839 Bytecodes::Code get_code = (Bytecodes::Code)0;
840 Bytecodes::Code put_code = (Bytecodes::Code)0;
841 if (!uninitialized_static) {
842 if (is_static) {
843 get_code = Bytecodes::_getstatic;
844 } else {
845 get_code = ((is_value) ? Bytecodes::_vgetfield : Bytecodes::_getfield);
846 }
847 if (is_put && is_value) {
848 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_vwithfield);
849 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
850 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
851 }
852 }
853
854 cp_cache_entry->set_field(
855 get_code,
856 put_code,
857 info.field_holder(),
858 info.index(),
859 info.offset(),
860 state,
861 info.access_flags().is_final(),
862 info.access_flags().is_volatile(),
863 pool->pool_holder()
864 );
865 }
866
867
868 //------------------------------------------------------------------------------------------------------------------------
869 // Synchronization
870 //
871 // The interpreter's synchronization code is factored out so that it can
872 // be shared by method invocation and synchronized blocks.
873 //%note synchronization_3
874
875 //%note monitor_1
876 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
877 #ifdef ASSERT
878 thread->last_frame().interpreter_frame_verify_monitor(elem);
879 #endif
880 if (PrintBiasedLockingStatistics) {
881 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
882 }
883 Handle h_obj(thread, elem->obj());
884 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
885 "must be NULL or an object");
886 if (UseBiasedLocking) {
887 // Retry fast entry if bias is revoked to avoid unnecessary inflation
888 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
889 } else {
890 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
891 }
892 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
893 "must be NULL or an object");
894 #ifdef ASSERT
895 thread->last_frame().interpreter_frame_verify_monitor(elem);
896 #endif
897 IRT_END
898
899
900 //%note monitor_1
901 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
902 #ifdef ASSERT
903 thread->last_frame().interpreter_frame_verify_monitor(elem);
904 #endif
905 Handle h_obj(thread, elem->obj());
906 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
907 "must be NULL or an object");
908 if (elem == NULL || h_obj()->is_unlocked()) {
909 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
910 }
911 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
912 // Free entry. This must be done here, since a pending exception might be installed on
913 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
914 elem->set_obj(NULL);
915 #ifdef ASSERT
916 thread->last_frame().interpreter_frame_verify_monitor(elem);
917 #endif
918 IRT_END
919
920
921 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
922 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
923 IRT_END
924
925
926 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
927 // Returns an illegal exception to install into the current thread. The
928 // pending_exception flag is cleared so normal exception handling does not
929 // trigger. Any current installed exception will be overwritten. This
930 // method will be called during an exception unwind.
931
932 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
933 Handle exception(thread, thread->vm_result());
934 assert(exception() != NULL, "vm result should be set");
935 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
936 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
937 exception = get_preinitialized_exception(
938 SystemDictionary::IllegalMonitorStateException_klass(),
939 CATCH);
940 }
941 thread->set_vm_result(exception());
942 IRT_END
943
944
945 //------------------------------------------------------------------------------------------------------------------------
946 // Invokes
947
948 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
949 return method->orig_bytecode_at(method->bci_from(bcp));
950 IRT_END
951
952 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
953 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
954 IRT_END
955
956 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
957 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
958 IRT_END
959
960 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
961 Thread* THREAD = thread;
962 // extract receiver from the outgoing argument list if necessary
963 Handle receiver(thread, NULL);
964 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
965 bytecode == Bytecodes::_invokespecial) {
966 ResourceMark rm(thread);
967 methodHandle m (thread, method(thread));
968 Bytecode_invoke call(m, bci(thread));
969 Symbol* signature = call.signature();
970 receiver = Handle(thread,
971 thread->last_frame().interpreter_callee_receiver(signature));
972 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
973 "sanity check");
974 assert(receiver.is_null() ||
975 !Universe::heap()->is_in_reserved(receiver->klass()),
976 "sanity check");
977 }
978
979 // resolve method
980 CallInfo info;
981 constantPoolHandle pool(thread, method(thread)->constants());
982
983 {
984 JvmtiHideSingleStepping jhss(thread);
985 LinkResolver::resolve_invoke(info, receiver, pool,
986 get_index_u2_cpcache(thread, bytecode), bytecode,
987 CHECK);
988 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
989 int retry_count = 0;
990 while (info.resolved_method()->is_old()) {
991 // It is very unlikely that method is redefined more than 100 times
992 // in the middle of resolve. If it is looping here more than 100 times
993 // means then there could be a bug here.
994 guarantee((retry_count++ < 100),
995 "Could not resolve to latest version of redefined method");
996 // method is redefined in the middle of resolve so re-try.
997 LinkResolver::resolve_invoke(info, receiver, pool,
998 get_index_u2_cpcache(thread, bytecode), bytecode,
999 CHECK);
1000 }
1001 }
1002 } // end JvmtiHideSingleStepping
1003
1004 // check if link resolution caused cpCache to be updated
1005 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
1006 if (cp_cache_entry->is_resolved(bytecode)) return;
1007
1008 #ifdef ASSERT
1009 if (bytecode == Bytecodes::_invokeinterface) {
1010 if (info.resolved_method()->method_holder() ==
1011 SystemDictionary::Object_klass()) {
1012 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1013 // (see also CallInfo::set_interface for details)
1014 assert(info.call_kind() == CallInfo::vtable_call ||
1015 info.call_kind() == CallInfo::direct_call, "");
1016 methodHandle rm = info.resolved_method();
1017 assert(rm->is_final() || info.has_vtable_index(),
1018 "should have been set already");
1019 } else if (!info.resolved_method()->has_itable_index()) {
1020 // Resolved something like CharSequence.toString. Use vtable not itable.
1021 assert(info.call_kind() != CallInfo::itable_call, "");
1022 } else {
1023 // Setup itable entry
1024 assert(info.call_kind() == CallInfo::itable_call, "");
1025 int index = info.resolved_method()->itable_index();
1026 assert(info.itable_index() == index, "");
1027 }
1028 } else if (bytecode == Bytecodes::_invokespecial) {
1029 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1030 } else {
1031 assert(info.call_kind() == CallInfo::direct_call ||
1032 info.call_kind() == CallInfo::vtable_call, "");
1033 }
1034 #endif
1035 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
1036 // it is not an interface. The receiver for invokespecial calls within interface
1037 // methods must be checked for every call.
1038 InstanceKlass* sender = pool->pool_holder();
1039 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1040
1041 switch (info.call_kind()) {
1042 case CallInfo::direct_call:
1043 cp_cache_entry->set_direct_call(
1044 bytecode,
1045 info.resolved_method(),
1046 sender->is_interface());
1047 break;
1048 case CallInfo::vtable_call:
1049 cp_cache_entry->set_vtable_call(
1050 bytecode,
1051 info.resolved_method(),
1052 info.vtable_index());
1053 break;
1054 case CallInfo::itable_call:
1055 cp_cache_entry->set_itable_call(
1056 bytecode,
1057 info.resolved_method(),
1058 info.itable_index());
1059 break;
1060 default: ShouldNotReachHere();
1061 }
1062 }
1063
1064
1065 // First time execution: Resolve symbols, create a permanent MethodType object.
1066 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1067 Thread* THREAD = thread;
1068 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1069
1070 // resolve method
1071 CallInfo info;
1072 constantPoolHandle pool(thread, method(thread)->constants());
1073 {
1074 JvmtiHideSingleStepping jhss(thread);
1075 LinkResolver::resolve_invoke(info, Handle(), pool,
1076 get_index_u2_cpcache(thread, bytecode), bytecode,
1077 CHECK);
1078 } // end JvmtiHideSingleStepping
1079
1080 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
1081 cp_cache_entry->set_method_handle(pool, info);
1082 }
1083
1084 // First time execution: Resolve symbols, create a permanent CallSite object.
1085 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1086 Thread* THREAD = thread;
1087 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1088
1089 //TO DO: consider passing BCI to Java.
1090 // int caller_bci = method(thread)->bci_from(bcp(thread));
1091
1092 // resolve method
1093 CallInfo info;
1094 constantPoolHandle pool(thread, method(thread)->constants());
1095 int index = get_index_u4(thread, bytecode);
1096 {
1097 JvmtiHideSingleStepping jhss(thread);
1098 LinkResolver::resolve_invoke(info, Handle(), pool,
1099 index, bytecode, CHECK);
1100 } // end JvmtiHideSingleStepping
1101
1102 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1103 cp_cache_entry->set_dynamic_call(pool, info);
1104 }
1105
1106 // This function is the interface to the assembly code. It returns the resolved
1107 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1108 // This function will check for redefinition!
1109 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1110 switch (bytecode) {
1111 case Bytecodes::_getstatic:
1112 case Bytecodes::_putstatic:
1113 case Bytecodes::_getfield:
1114 case Bytecodes::_putfield:
1115 case Bytecodes::_vgetfield:
1116 case Bytecodes::_vwithfield:
1117 resolve_get_put(thread, bytecode);
1118 break;
1119 case Bytecodes::_invokevirtual:
1120 case Bytecodes::_invokespecial:
1121 case Bytecodes::_invokestatic:
1122 case Bytecodes::_invokeinterface:
1123 resolve_invoke(thread, bytecode);
1124 break;
1125 case Bytecodes::_invokehandle:
1126 resolve_invokehandle(thread);
1127 break;
1128 case Bytecodes::_invokedynamic:
1129 resolve_invokedynamic(thread);
1130 break;
1131 default:
1132 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1133 break;
1134 }
1135 }
1136 IRT_END
1137
1138 //------------------------------------------------------------------------------------------------------------------------
1139 // Miscellaneous
1140
1141
1142 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1143 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1144 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1145 if (branch_bcp != NULL && nm != NULL) {
1146 // This was a successful request for an OSR nmethod. Because
1147 // frequency_counter_overflow_inner ends with a safepoint check,
1148 // nm could have been unloaded so look it up again. It's unsafe
1149 // to examine nm directly since it might have been freed and used
1150 // for something else.
1151 frame fr = thread->last_frame();
1152 Method* method = fr.interpreter_frame_method();
1153 int bci = method->bci_from(fr.interpreter_frame_bcp());
1154 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1155 }
1156 #ifndef PRODUCT
1157 if (TraceOnStackReplacement) {
1158 if (nm != NULL) {
1159 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1160 nm->print();
1161 }
1162 }
1163 #endif
1164 return nm;
1165 }
1166
1167 IRT_ENTRY(nmethod*,
1168 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1169 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1170 // flag, in case this method triggers classloading which will call into Java.
1171 UnlockFlagSaver fs(thread);
1172
1173 frame fr = thread->last_frame();
1174 assert(fr.is_interpreted_frame(), "must come from interpreter");
1175 methodHandle method(thread, fr.interpreter_frame_method());
1176 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1177 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
1178
1179 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1180 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1181 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1182
1183 if (osr_nm != NULL) {
1184 // We may need to do on-stack replacement which requires that no
1185 // monitors in the activation are biased because their
1186 // BasicObjectLocks will need to migrate during OSR. Force
1187 // unbiasing of all monitors in the activation now (even though
1188 // the OSR nmethod might be invalidated) because we don't have a
1189 // safepoint opportunity later once the migration begins.
1190 if (UseBiasedLocking) {
1191 ResourceMark rm;
1192 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1193 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
1194 kptr < fr.interpreter_frame_monitor_begin();
1195 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
1196 if( kptr->obj() != NULL ) {
1197 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1198 }
1199 }
1200 BiasedLocking::revoke(objects_to_revoke);
1201 }
1202 }
1203 return osr_nm;
1204 IRT_END
1205
1206 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1207 assert(ProfileInterpreter, "must be profiling interpreter");
1208 int bci = method->bci_from(cur_bcp);
1209 MethodData* mdo = method->method_data();
1210 if (mdo == NULL) return 0;
1211 return mdo->bci_to_di(bci);
1212 IRT_END
1213
1214 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1215 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1216 // flag, in case this method triggers classloading which will call into Java.
1217 UnlockFlagSaver fs(thread);
1218
1219 assert(ProfileInterpreter, "must be profiling interpreter");
1220 frame fr = thread->last_frame();
1221 assert(fr.is_interpreted_frame(), "must come from interpreter");
1222 methodHandle method(thread, fr.interpreter_frame_method());
1223 Method::build_interpreter_method_data(method, THREAD);
1224 if (HAS_PENDING_EXCEPTION) {
1225 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1226 CLEAR_PENDING_EXCEPTION;
1227 // and fall through...
1228 }
1229 IRT_END
1230
1231
1232 #ifdef ASSERT
1233 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1234 assert(ProfileInterpreter, "must be profiling interpreter");
1235
1236 MethodData* mdo = method->method_data();
1237 assert(mdo != NULL, "must not be null");
1238
1239 int bci = method->bci_from(bcp);
1240
1241 address mdp2 = mdo->bci_to_dp(bci);
1242 if (mdp != mdp2) {
1243 ResourceMark rm;
1244 ResetNoHandleMark rnm; // In a LEAF entry.
1245 HandleMark hm;
1246 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1247 int current_di = mdo->dp_to_di(mdp);
1248 int expected_di = mdo->dp_to_di(mdp2);
1249 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1250 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1251 int approx_bci = -1;
1252 if (current_di >= 0) {
1253 approx_bci = mdo->data_at(current_di)->bci();
1254 }
1255 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1256 mdo->print_on(tty);
1257 method->print_codes();
1258 }
1259 assert(mdp == mdp2, "wrong mdp");
1260 IRT_END
1261 #endif // ASSERT
1262
1263 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1264 assert(ProfileInterpreter, "must be profiling interpreter");
1265 ResourceMark rm(thread);
1266 HandleMark hm(thread);
1267 frame fr = thread->last_frame();
1268 assert(fr.is_interpreted_frame(), "must come from interpreter");
1269 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1270
1271 // Grab a lock to ensure atomic access to setting the return bci and
1272 // the displacement. This can block and GC, invalidating all naked oops.
1273 MutexLocker ml(RetData_lock);
1274
1275 // ProfileData is essentially a wrapper around a derived oop, so we
1276 // need to take the lock before making any ProfileData structures.
1277 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1278 RetData* rdata = data->as_RetData();
1279 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1280 fr.interpreter_frame_set_mdp(new_mdp);
1281 IRT_END
1282
1283 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1284 MethodCounters* mcs = Method::build_method_counters(m, thread);
1285 if (HAS_PENDING_EXCEPTION) {
1286 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1287 CLEAR_PENDING_EXCEPTION;
1288 }
1289 return mcs;
1290 IRT_END
1291
1292
1293 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1294 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1295 // stack traversal automatically takes care of preserving arguments for invoke, so
1296 // this is no longer needed.
1297
1298 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1299 // if this is called during a safepoint
1300
1301 if (JvmtiExport::should_post_single_step()) {
1302 // We are called during regular safepoints and when the VM is
1303 // single stepping. If any thread is marked for single stepping,
1304 // then we may have JVMTI work to do.
1305 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1306 }
1307 IRT_END
1308
1309 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1310 ConstantPoolCacheEntry *cp_entry))
1311
1312 // check the access_flags for the field in the klass
1313
1314 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1315 int index = cp_entry->field_index();
1316 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1317
1318 bool is_static = (obj == NULL);
1319 HandleMark hm(thread);
1320
1321 Handle h_obj;
1322 if (!is_static) {
1323 // non-static field accessors have an object, but we need a handle
1324 h_obj = Handle(thread, obj);
1325 }
1326 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1327 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1328 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), cp_entry_f1, h_obj, fid);
1329 IRT_END
1330
1331 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1332 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1333
1334 Klass* k = cp_entry->f1_as_klass();
1335
1336 // check the access_flags for the field in the klass
1337 InstanceKlass* ik = InstanceKlass::cast(k);
1338 int index = cp_entry->field_index();
1339 // bail out if field modifications are not watched
1340 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1341
1342 char sig_type = '\0';
1343
1344 switch(cp_entry->flag_state()) {
1345 case btos: sig_type = 'B'; break;
1346 case ztos: sig_type = 'Z'; break;
1347 case ctos: sig_type = 'C'; break;
1348 case stos: sig_type = 'S'; break;
1349 case itos: sig_type = 'I'; break;
1350 case ftos: sig_type = 'F'; break;
1351 case atos: sig_type = 'L'; break;
1352 case ltos: sig_type = 'J'; break;
1353 case dtos: sig_type = 'D'; break;
1354 default: ShouldNotReachHere(); return;
1355 }
1356 bool is_static = (obj == NULL);
1357
1358 HandleMark hm(thread);
1359 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1360 jvalue fvalue;
1361 #ifdef _LP64
1362 fvalue = *value;
1363 #else
1364 // Long/double values are stored unaligned and also noncontiguously with
1365 // tagged stacks. We can't just do a simple assignment even in the non-
1366 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1367 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1368 // We assume that the two halves of longs/doubles are stored in interpreter
1369 // stack slots in platform-endian order.
1370 jlong_accessor u;
1371 jint* newval = (jint*)value;
1372 u.words[0] = newval[0];
1373 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1374 fvalue.j = u.long_value;
1375 #endif // _LP64
1376
1377 Handle h_obj;
1378 if (!is_static) {
1379 // non-static field accessors have an object, but we need a handle
1380 h_obj = Handle(thread, obj);
1381 }
1382
1383 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), ik, h_obj,
1384 fid, sig_type, &fvalue);
1385 IRT_END
1386
1387 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1388 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1389 IRT_END
1390
1391
1392 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1393 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1394 IRT_END
1395
1396 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1397 {
1398 return (Interpreter::contains(pc) ? 1 : 0);
1399 }
1400 IRT_END
1401
1402
1403 // Implementation of SignatureHandlerLibrary
1404
1405 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1406 // Dummy definition (else normalization method is defined in CPU
1407 // dependant code)
1408 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1409 return fingerprint;
1410 }
1411 #endif
1412
1413 address SignatureHandlerLibrary::set_handler_blob() {
1414 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1415 if (handler_blob == NULL) {
1416 return NULL;
1417 }
1418 address handler = handler_blob->code_begin();
1419 _handler_blob = handler_blob;
1420 _handler = handler;
1421 return handler;
1422 }
1423
1424 void SignatureHandlerLibrary::initialize() {
1425 if (_fingerprints != NULL) {
1426 return;
1427 }
1428 if (set_handler_blob() == NULL) {
1429 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1430 }
1431
1432 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1433 SignatureHandlerLibrary::buffer_size);
1434 _buffer = bb->code_begin();
1435
1436 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1437 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1438 }
1439
1440 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1441 address handler = _handler;
1442 int insts_size = buffer->pure_insts_size();
1443 if (handler + insts_size > _handler_blob->code_end()) {
1444 // get a new handler blob
1445 handler = set_handler_blob();
1446 }
1447 if (handler != NULL) {
1448 memcpy(handler, buffer->insts_begin(), insts_size);
1449 pd_set_handler(handler);
1450 ICache::invalidate_range(handler, insts_size);
1451 _handler = handler + insts_size;
1452 }
1453 return handler;
1454 }
1455
1456 void SignatureHandlerLibrary::add(const methodHandle& method) {
1457 if (method->signature_handler() == NULL) {
1458 // use slow signature handler if we can't do better
1459 int handler_index = -1;
1460 // check if we can use customized (fast) signature handler
1461 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1462 // use customized signature handler
1463 MutexLocker mu(SignatureHandlerLibrary_lock);
1464 // make sure data structure is initialized
1465 initialize();
1466 // lookup method signature's fingerprint
1467 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1468 // allow CPU dependant code to optimize the fingerprints for the fast handler
1469 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1470 handler_index = _fingerprints->find(fingerprint);
1471 // create handler if necessary
1472 if (handler_index < 0) {
1473 ResourceMark rm;
1474 ptrdiff_t align_offset = (address)
1475 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1476 CodeBuffer buffer((address)(_buffer + align_offset),
1477 SignatureHandlerLibrary::buffer_size - align_offset);
1478 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1479 // copy into code heap
1480 address handler = set_handler(&buffer);
1481 if (handler == NULL) {
1482 // use slow signature handler (without memorizing it in the fingerprints)
1483 } else {
1484 // debugging suppport
1485 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1486 ttyLocker ttyl;
1487 tty->cr();
1488 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1489 _handlers->length(),
1490 (method->is_static() ? "static" : "receiver"),
1491 method->name_and_sig_as_C_string(),
1492 fingerprint,
1493 buffer.insts_size());
1494 if (buffer.insts_size() > 0) {
1495 Disassembler::decode(handler, handler + buffer.insts_size());
1496 }
1497 #ifndef PRODUCT
1498 address rh_begin = Interpreter::result_handler(method()->result_type());
1499 if (CodeCache::contains(rh_begin)) {
1500 // else it might be special platform dependent values
1501 tty->print_cr(" --- associated result handler ---");
1502 address rh_end = rh_begin;
1503 while (*(int*)rh_end != 0) {
1504 rh_end += sizeof(int);
1505 }
1506 Disassembler::decode(rh_begin, rh_end);
1507 } else {
1508 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1509 }
1510 #endif
1511 }
1512 // add handler to library
1513 _fingerprints->append(fingerprint);
1514 _handlers->append(handler);
1515 // set handler index
1516 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1517 handler_index = _fingerprints->length() - 1;
1518 }
1519 }
1520 // Set handler under SignatureHandlerLibrary_lock
1521 if (handler_index < 0) {
1522 // use generic signature handler
1523 method->set_signature_handler(Interpreter::slow_signature_handler());
1524 } else {
1525 // set handler
1526 method->set_signature_handler(_handlers->at(handler_index));
1527 }
1528 } else {
1529 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1530 // use generic signature handler
1531 method->set_signature_handler(Interpreter::slow_signature_handler());
1532 }
1533 }
1534 #ifdef ASSERT
1535 int handler_index = -1;
1536 int fingerprint_index = -2;
1537 {
1538 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1539 // in any way if accessed from multiple threads. To avoid races with another
1540 // thread which may change the arrays in the above, mutex protected block, we
1541 // have to protect this read access here with the same mutex as well!
1542 MutexLocker mu(SignatureHandlerLibrary_lock);
1543 if (_handlers != NULL) {
1544 handler_index = _handlers->find(method->signature_handler());
1545 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1546 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1547 fingerprint_index = _fingerprints->find(fingerprint);
1548 }
1549 }
1550 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1551 handler_index == fingerprint_index, "sanity check");
1552 #endif // ASSERT
1553 }
1554
1555 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1556 int handler_index = -1;
1557 // use customized signature handler
1558 MutexLocker mu(SignatureHandlerLibrary_lock);
1559 // make sure data structure is initialized
1560 initialize();
1561 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1562 handler_index = _fingerprints->find(fingerprint);
1563 // create handler if necessary
1564 if (handler_index < 0) {
1565 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1566 tty->cr();
1567 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1568 _handlers->length(),
1569 p2i(handler),
1570 fingerprint);
1571 }
1572 _fingerprints->append(fingerprint);
1573 _handlers->append(handler);
1574 } else {
1575 if (PrintSignatureHandlers) {
1576 tty->cr();
1577 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1578 _handlers->length(),
1579 fingerprint,
1580 p2i(_handlers->at(handler_index)),
1581 p2i(handler));
1582 }
1583 }
1584 }
1585
1586
1587 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1588 address SignatureHandlerLibrary::_handler = NULL;
1589 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1590 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1591 address SignatureHandlerLibrary::_buffer = NULL;
1592
1593
1594 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1595 methodHandle m(thread, method);
1596 assert(m->is_native(), "sanity check");
1597 // lookup native function entry point if it doesn't exist
1598 bool in_base_library;
1599 if (!m->has_native_function()) {
1600 NativeLookup::lookup(m, in_base_library, CHECK);
1601 }
1602 // make sure signature handler is installed
1603 SignatureHandlerLibrary::add(m);
1604 // The interpreter entry point checks the signature handler first,
1605 // before trying to fetch the native entry point and klass mirror.
1606 // We must set the signature handler last, so that multiple processors
1607 // preparing the same method will be sure to see non-null entry & mirror.
1608 IRT_END
1609
1610 #if defined(IA32) || defined(AMD64) || defined(ARM)
1611 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1612 if (src_address == dest_address) {
1613 return;
1614 }
1615 ResetNoHandleMark rnm; // In a LEAF entry.
1616 HandleMark hm;
1617 ResourceMark rm;
1618 frame fr = thread->last_frame();
1619 assert(fr.is_interpreted_frame(), "");
1620 jint bci = fr.interpreter_frame_bci();
1621 methodHandle mh(thread, fr.interpreter_frame_method());
1622 Bytecode_invoke invoke(mh, bci);
1623 ArgumentSizeComputer asc(invoke.signature());
1624 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1625 Copy::conjoint_jbytes(src_address, dest_address,
1626 size_of_arguments * Interpreter::stackElementSize);
1627 IRT_END
1628 #endif
1629
1630 #if INCLUDE_JVMTI
1631 // This is a support of the JVMTI PopFrame interface.
1632 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1633 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1634 // The member_name argument is a saved reference (in local#0) to the member_name.
1635 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1636 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1637 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1638 Method* method, address bcp))
1639 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1640 if (code != Bytecodes::_invokestatic) {
1641 return;
1642 }
1643 ConstantPool* cpool = method->constants();
1644 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1645 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1646 Symbol* mname = cpool->name_ref_at(cp_index);
1647
1648 if (MethodHandles::has_member_arg(cname, mname)) {
1649 oop member_name_oop = (oop) member_name;
1650 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1651 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1652 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1653 }
1654 thread->set_vm_result(member_name_oop);
1655 } else {
1656 thread->set_vm_result(NULL);
1657 }
1658 IRT_END
1659 #endif // INCLUDE_JVMTI
1660
1661 #ifndef PRODUCT
1662 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1663 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1664 // The generated code still uses call_VM because that will set up the frame pointer for
1665 // bcp and method.
1666 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1667 const frame f = thread->last_frame();
1668 assert(f.is_interpreted_frame(), "must be an interpreted frame");
1669 methodHandle mh(thread, f.interpreter_frame_method());
1670 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2);
1671 return preserve_this_value;
1672 IRT_END
1673 #endif // !PRODUCT