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 = (ValueKlass*)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 (((ArrayKlass*)klass)->element_klass() != ((oop)val)->klass()) {
400 THROW(vmSymbols::java_lang_ArrayStoreException());
401 }
402 if (klass->is_objArray_klass()) {
403 ((objArrayOop) array)->obj_at_put(index, (oop)val);
404 }
405 else {
406 valueArrayOop varray = (valueArrayOop)array;
407 ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass);
408 ValueKlass* vklass = (ValueKlass*)vaklass->element_klass();
409 const int lh = vaklass->layout_helper();
410 vklass->value_store(vklass->data_for_oop((oop)val), varray->value_at_addr(index, lh),
411 vaklass->element_value_store_size(), true, false);
412 }
413 IRT_END
414
415 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
416 // We may want to pass in more arguments - could make this slightly faster
417 ConstantPool* constants = method(thread)->constants();
418 int i = get_index_u2(thread, Bytecodes::_multianewarray);
419 Klass* klass = constants->klass_at(i, CHECK);
420 int nof_dims = number_of_dimensions(thread);
421 assert(klass->is_klass(), "not a class");
422 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
423
424 if (klass->is_value()) { // Logically creates elements, ensure klass init
425 klass->initialize(CHECK);
426 }
427
428 // We must create an array of jints to pass to multi_allocate.
429 ResourceMark rm(thread);
430 const int small_dims = 10;
431 jint dim_array[small_dims];
432 jint *dims = &dim_array[0];
433 if (nof_dims > small_dims) {
434 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
435 }
436 for (int index = 0; index < nof_dims; index++) {
437 // offset from first_size_address is addressed as local[index]
438 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
439 dims[index] = first_size_address[n];
440 }
441 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
442 thread->set_vm_result(obj);
443 IRT_END
444
445
446 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
447 assert(obj->is_oop(), "must be a valid oop");
448 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
449 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
450 IRT_END
451
452
453 // Quicken instance-of and check-cast bytecodes
454 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
455 // Force resolving; quicken the bytecode
456 int which = get_index_u2(thread, Bytecodes::_checkcast);
457 ConstantPool* cpool = method(thread)->constants();
458 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
459 // program we might have seen an unquick'd bytecode in the interpreter but have another
460 // thread quicken the bytecode before we get here.
461 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
462 Klass* klass = cpool->klass_at(which, CHECK);
463 thread->set_vm_result_2(klass);
464 IRT_END
465
466
467 //------------------------------------------------------------------------------------------------------------------------
468 // Exceptions
469
470 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
471 methodHandle trap_method, int trap_bci, TRAPS) {
472 if (trap_method.not_null()) {
473 MethodData* trap_mdo = trap_method->method_data();
474 if (trap_mdo == NULL) {
475 Method::build_interpreter_method_data(trap_method, THREAD);
476 if (HAS_PENDING_EXCEPTION) {
477 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
478 "we expect only an OOM error here");
479 CLEAR_PENDING_EXCEPTION;
480 }
481 trap_mdo = trap_method->method_data();
482 // and fall through...
483 }
484 if (trap_mdo != NULL) {
485 // Update per-method count of trap events. The interpreter
486 // is updating the MDO to simulate the effect of compiler traps.
487 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
488 }
489 }
490 }
491
492 // Assume the compiler is (or will be) interested in this event.
493 // If necessary, create an MDO to hold the information, and record it.
494 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
495 assert(ProfileTraps, "call me only if profiling");
496 methodHandle trap_method(thread, method(thread));
497 int trap_bci = trap_method->bci_from(bcp(thread));
498 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
499 }
500
501 #ifdef CC_INTERP
502 // As legacy note_trap, but we have more arguments.
503 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
504 methodHandle trap_method(method);
505 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
506 IRT_END
507
508 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
509 // for each exception.
510 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
511 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
512 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
513 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
514 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
515 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
516 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
517 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
518 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
519 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
520 #endif // CC_INTERP
521
522
523 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
524 // get klass
525 InstanceKlass* klass = InstanceKlass::cast(k);
526 assert(klass->is_initialized(),
527 "this klass should have been initialized during VM initialization");
528 // create instance - do not call constructor since we may have no
529 // (java) stack space left (should assert constructor is empty)
530 Handle exception;
531 oop exception_oop = klass->allocate_instance(CHECK_(exception));
532 exception = Handle(THREAD, exception_oop);
533 if (StackTraceInThrowable) {
534 java_lang_Throwable::fill_in_stack_trace(exception);
535 }
536 return exception;
537 }
538
539 // Special handling for stack overflow: since we don't have any (java) stack
540 // space left we use the pre-allocated & pre-initialized StackOverflowError
541 // klass to create an stack overflow error instance. We do not call its
542 // constructor for the same reason (it is empty, anyway).
543 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
544 Handle exception = get_preinitialized_exception(
545 SystemDictionary::StackOverflowError_klass(),
546 CHECK);
547 // Increment counter for hs_err file reporting
548 Atomic::inc(&Exceptions::_stack_overflow_errors);
549 THROW_HANDLE(exception);
550 IRT_END
551
552 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
553 Handle exception = get_preinitialized_exception(
554 SystemDictionary::StackOverflowError_klass(),
555 CHECK);
556 java_lang_Throwable::set_message(exception(),
557 Universe::delayed_stack_overflow_error_message());
558 // Increment counter for hs_err file reporting
559 Atomic::inc(&Exceptions::_stack_overflow_errors);
560 THROW_HANDLE(exception);
561 IRT_END
562
563 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
564 // lookup exception klass
565 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
566 if (ProfileTraps) {
567 if (s == vmSymbols::java_lang_ArithmeticException()) {
568 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
569 } else if (s == vmSymbols::java_lang_NullPointerException()) {
570 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
571 }
572 }
573 // create exception
574 Handle exception = Exceptions::new_exception(thread, s, message);
575 thread->set_vm_result(exception());
576 IRT_END
577
578
579 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
580 ResourceMark rm(thread);
581 const char* klass_name = obj->klass()->external_name();
582 // lookup exception klass
583 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
584 if (ProfileTraps) {
585 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
586 }
587 // create exception, with klass name as detail message
588 Handle exception = Exceptions::new_exception(thread, s, klass_name);
589 thread->set_vm_result(exception());
590 IRT_END
591
592
593 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
594 char message[jintAsStringSize];
595 // lookup exception klass
596 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
597 if (ProfileTraps) {
598 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
599 }
600 // create exception
601 sprintf(message, "%d", index);
602 THROW_MSG(s, message);
603 IRT_END
604
605 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
606 JavaThread* thread, oopDesc* obj))
607
608 ResourceMark rm(thread);
609 char* message = SharedRuntime::generate_class_cast_message(
610 thread, obj->klass());
611
612 if (ProfileTraps) {
613 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
614 }
615
616 // create exception
617 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
618 IRT_END
619
620 // exception_handler_for_exception(...) returns the continuation address,
621 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
622 // The exception oop is returned to make sure it is preserved over GC (it
623 // is only on the stack if the exception was thrown explicitly via athrow).
624 // During this operation, the expression stack contains the values for the
625 // bci where the exception happened. If the exception was propagated back
626 // from a call, the expression stack contains the values for the bci at the
627 // invoke w/o arguments (i.e., as if one were inside the call).
628 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
629
630 Handle h_exception(thread, exception);
631 methodHandle h_method (thread, method(thread));
632 constantPoolHandle h_constants(thread, h_method->constants());
633 bool should_repeat;
634 int handler_bci;
635 int current_bci = bci(thread);
636
637 if (thread->frames_to_pop_failed_realloc() > 0) {
638 // Allocation of scalar replaced object used in this frame
639 // failed. Unconditionally pop the frame.
640 thread->dec_frames_to_pop_failed_realloc();
641 thread->set_vm_result(h_exception());
642 // If the method is synchronized we already unlocked the monitor
643 // during deoptimization so the interpreter needs to skip it when
644 // the frame is popped.
645 thread->set_do_not_unlock_if_synchronized(true);
646 #ifdef CC_INTERP
647 return (address) -1;
648 #else
649 return Interpreter::remove_activation_entry();
650 #endif
651 }
652
653 // Need to do this check first since when _do_not_unlock_if_synchronized
654 // is set, we don't want to trigger any classloading which may make calls
655 // into java, or surprisingly find a matching exception handler for bci 0
656 // since at this moment the method hasn't been "officially" entered yet.
657 if (thread->do_not_unlock_if_synchronized()) {
658 ResourceMark rm;
659 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
660 thread->set_vm_result(exception);
661 #ifdef CC_INTERP
662 return (address) -1;
663 #else
664 return Interpreter::remove_activation_entry();
665 #endif
666 }
667
668 do {
669 should_repeat = false;
670
671 // assertions
672 #ifdef ASSERT
673 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
674 assert(h_exception->is_oop(), "just checking");
675 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
676 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
677 if (ExitVMOnVerifyError) vm_exit(-1);
678 ShouldNotReachHere();
679 }
680 #endif
681
682 // tracing
683 if (log_is_enabled(Info, exceptions)) {
684 ResourceMark rm(thread);
685 stringStream tempst;
686 tempst.print("interpreter method <%s>\n"
687 " at bci %d for thread " INTPTR_FORMAT,
688 h_method->print_value_string(), current_bci, p2i(thread));
689 Exceptions::log_exception(h_exception, tempst);
690 }
691 // Don't go paging in something which won't be used.
692 // else if (extable->length() == 0) {
693 // // disabled for now - interpreter is not using shortcut yet
694 // // (shortcut is not to call runtime if we have no exception handlers)
695 // // warning("performance bug: should not call runtime if method has no exception handlers");
696 // }
697 // for AbortVMOnException flag
698 Exceptions::debug_check_abort(h_exception);
699
700 // exception handler lookup
701 Klass* klass = h_exception->klass();
702 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
703 if (HAS_PENDING_EXCEPTION) {
704 // We threw an exception while trying to find the exception handler.
705 // Transfer the new exception to the exception handle which will
706 // be set into thread local storage, and do another lookup for an
707 // exception handler for this exception, this time starting at the
708 // BCI of the exception handler which caused the exception to be
709 // thrown (bug 4307310).
710 h_exception = Handle(THREAD, PENDING_EXCEPTION);
711 CLEAR_PENDING_EXCEPTION;
712 if (handler_bci >= 0) {
713 current_bci = handler_bci;
714 should_repeat = true;
715 }
716 }
717 } while (should_repeat == true);
718
719 #if INCLUDE_JVMCI
720 if (EnableJVMCI && h_method->method_data() != NULL) {
721 ResourceMark rm(thread);
722 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
723 if (pdata != NULL && pdata->is_BitData()) {
724 BitData* bit_data = (BitData*) pdata;
725 bit_data->set_exception_seen();
726 }
727 }
728 #endif
729
730 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
731 // time throw or a stack unwinding throw and accordingly notify the debugger
732 if (JvmtiExport::can_post_on_exceptions()) {
733 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
734 }
735
736 #ifdef CC_INTERP
737 address continuation = (address)(intptr_t) handler_bci;
738 #else
739 address continuation = NULL;
740 #endif
741 address handler_pc = NULL;
742 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
743 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
744 // handler in this method, or (b) after a stack overflow there is not yet
745 // enough stack space available to reprotect the stack.
746 #ifndef CC_INTERP
747 continuation = Interpreter::remove_activation_entry();
748 #endif
749 #if COMPILER2_OR_JVMCI
750 // Count this for compilation purposes
751 h_method->interpreter_throwout_increment(THREAD);
752 #endif
753 } else {
754 // handler in this method => change bci/bcp to handler bci/bcp and continue there
755 handler_pc = h_method->code_base() + handler_bci;
756 #ifndef CC_INTERP
757 set_bcp_and_mdp(handler_pc, thread);
758 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
759 #endif
760 }
761 // notify debugger of an exception catch
762 // (this is good for exceptions caught in native methods as well)
763 if (JvmtiExport::can_post_on_exceptions()) {
764 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
765 }
766
767 thread->set_vm_result(h_exception());
768 return continuation;
769 IRT_END
770
771
772 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
773 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
774 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
775 IRT_END
776
777
778 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
779 THROW(vmSymbols::java_lang_AbstractMethodError());
780 IRT_END
781
782
783 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
784 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
785 IRT_END
786
787
788 //------------------------------------------------------------------------------------------------------------------------
789 // Fields
790 //
791
792 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
793 Thread* THREAD = thread;
794 // resolve field
795 fieldDescriptor info;
796 constantPoolHandle pool(thread, method(thread)->constants());
797 methodHandle m(thread, method(thread));
798 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
799 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_vwithfield);
800 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
801 bool is_value = (bytecode == Bytecodes::_vgetfield || bytecode == Bytecodes::_vwithfield);
802
803 {
804 JvmtiHideSingleStepping jhss(thread);
805 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
806 m, bytecode, CHECK);
807 } // end JvmtiHideSingleStepping
808
809 // check if link resolution caused cpCache to be updated
810 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
811 if (cp_cache_entry->is_resolved(bytecode)) return;
812
813 // compute auxiliary field attributes
814 TosState state = as_TosState(info.field_type());
815
816 // Resolution of put instructions on final fields is delayed. That is required so that
817 // exceptions are thrown at the correct place (when the instruction is actually invoked).
818 // If we do not resolve an instruction in the current pass, leaving the put_code
819 // set to zero will cause the next put instruction to the same field to reresolve.
820
821 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
822 // to final instance fields with updates originating from a method different than <init>)
823 // is inhibited. A putfield instruction targeting an instance final field must throw
824 // an IllegalAccessError if the instruction is not in an instance
825 // initializer method <init>. If resolution were not inhibited, a putfield
826 // in an initializer method could be resolved in the initializer. Subsequent
827 // putfield instructions to the same field would then use cached information.
828 // As a result, those instructions would not pass through the VM. That is,
829 // checks in resolve_field_access() would not be executed for those instructions
830 // and the required IllegalAccessError would not be thrown.
831 //
832 // Also, we need to delay resolving getstatic and putstatic instructions until the
833 // class is initialized. This is required so that access to the static
834 // field will call the initialization function every time until the class
835 // is completely initialized ala. in 2.17.5 in JVM Specification.
836 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
837 bool uninitialized_static = is_static && !klass->is_initialized();
838 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
839 info.has_initialized_final_update();
840 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
841
842 Bytecodes::Code get_code = (Bytecodes::Code)0;
843 Bytecodes::Code put_code = (Bytecodes::Code)0;
844 if (!uninitialized_static) {
845 if (is_static) {
846 get_code = Bytecodes::_getstatic;
847 } else {
848 get_code = ((is_value) ? Bytecodes::_vgetfield : Bytecodes::_getfield);
849 }
850 if (is_put && is_value) {
851 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_vwithfield);
852 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
853 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
854 }
855 }
856
857 cp_cache_entry->set_field(
858 get_code,
859 put_code,
860 info.field_holder(),
861 info.index(),
862 info.offset(),
863 state,
864 info.access_flags().is_final(),
865 info.access_flags().is_volatile(),
866 pool->pool_holder()
867 );
868 }
869
870
871 //------------------------------------------------------------------------------------------------------------------------
872 // Synchronization
873 //
874 // The interpreter's synchronization code is factored out so that it can
875 // be shared by method invocation and synchronized blocks.
876 //%note synchronization_3
877
878 //%note monitor_1
879 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
880 #ifdef ASSERT
881 thread->last_frame().interpreter_frame_verify_monitor(elem);
882 #endif
883 if (PrintBiasedLockingStatistics) {
884 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
885 }
886 Handle h_obj(thread, elem->obj());
887 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
888 "must be NULL or an object");
889 if (UseBiasedLocking) {
890 // Retry fast entry if bias is revoked to avoid unnecessary inflation
891 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
892 } else {
893 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
894 }
895 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
896 "must be NULL or an object");
897 #ifdef ASSERT
898 thread->last_frame().interpreter_frame_verify_monitor(elem);
899 #endif
900 IRT_END
901
902
903 //%note monitor_1
904 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
905 #ifdef ASSERT
906 thread->last_frame().interpreter_frame_verify_monitor(elem);
907 #endif
908 Handle h_obj(thread, elem->obj());
909 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
910 "must be NULL or an object");
911 if (elem == NULL || h_obj()->is_unlocked()) {
912 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
913 }
914 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
915 // Free entry. This must be done here, since a pending exception might be installed on
916 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
917 elem->set_obj(NULL);
918 #ifdef ASSERT
919 thread->last_frame().interpreter_frame_verify_monitor(elem);
920 #endif
921 IRT_END
922
923
924 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
925 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
926 IRT_END
927
928
929 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
930 // Returns an illegal exception to install into the current thread. The
931 // pending_exception flag is cleared so normal exception handling does not
932 // trigger. Any current installed exception will be overwritten. This
933 // method will be called during an exception unwind.
934
935 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
936 Handle exception(thread, thread->vm_result());
937 assert(exception() != NULL, "vm result should be set");
938 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
939 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
940 exception = get_preinitialized_exception(
941 SystemDictionary::IllegalMonitorStateException_klass(),
942 CATCH);
943 }
944 thread->set_vm_result(exception());
945 IRT_END
946
947
948 //------------------------------------------------------------------------------------------------------------------------
949 // Invokes
950
951 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
952 return method->orig_bytecode_at(method->bci_from(bcp));
953 IRT_END
954
955 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
956 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
957 IRT_END
958
959 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
960 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
961 IRT_END
962
963 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
964 Thread* THREAD = thread;
965 // extract receiver from the outgoing argument list if necessary
966 Handle receiver(thread, NULL);
967 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
968 bytecode == Bytecodes::_invokespecial) {
969 ResourceMark rm(thread);
970 methodHandle m (thread, method(thread));
971 Bytecode_invoke call(m, bci(thread));
972 Symbol* signature = call.signature();
973 receiver = Handle(thread,
974 thread->last_frame().interpreter_callee_receiver(signature));
975 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
976 "sanity check");
977 assert(receiver.is_null() ||
978 !Universe::heap()->is_in_reserved(receiver->klass()),
979 "sanity check");
980 }
981
982 // resolve method
983 CallInfo info;
984 constantPoolHandle pool(thread, method(thread)->constants());
985
986 {
987 JvmtiHideSingleStepping jhss(thread);
988 LinkResolver::resolve_invoke(info, receiver, pool,
989 get_index_u2_cpcache(thread, bytecode), bytecode,
990 CHECK);
991 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
992 int retry_count = 0;
993 while (info.resolved_method()->is_old()) {
994 // It is very unlikely that method is redefined more than 100 times
995 // in the middle of resolve. If it is looping here more than 100 times
996 // means then there could be a bug here.
997 guarantee((retry_count++ < 100),
998 "Could not resolve to latest version of redefined method");
999 // method is redefined in the middle of resolve so re-try.
1000 LinkResolver::resolve_invoke(info, receiver, pool,
1001 get_index_u2_cpcache(thread, bytecode), bytecode,
1002 CHECK);
1003 }
1004 }
1005 } // end JvmtiHideSingleStepping
1006
1007 // check if link resolution caused cpCache to be updated
1008 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
1009 if (cp_cache_entry->is_resolved(bytecode)) return;
1010
1011 #ifdef ASSERT
1012 if (bytecode == Bytecodes::_invokeinterface) {
1013 if (info.resolved_method()->method_holder() ==
1014 SystemDictionary::Object_klass()) {
1015 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1016 // (see also CallInfo::set_interface for details)
1017 assert(info.call_kind() == CallInfo::vtable_call ||
1018 info.call_kind() == CallInfo::direct_call, "");
1019 methodHandle rm = info.resolved_method();
1020 assert(rm->is_final() || info.has_vtable_index(),
1021 "should have been set already");
1022 } else if (!info.resolved_method()->has_itable_index()) {
1023 // Resolved something like CharSequence.toString. Use vtable not itable.
1024 assert(info.call_kind() != CallInfo::itable_call, "");
1025 } else {
1026 // Setup itable entry
1027 assert(info.call_kind() == CallInfo::itable_call, "");
1028 int index = info.resolved_method()->itable_index();
1029 assert(info.itable_index() == index, "");
1030 }
1031 } else if (bytecode == Bytecodes::_invokespecial) {
1032 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1033 } else {
1034 assert(info.call_kind() == CallInfo::direct_call ||
1035 info.call_kind() == CallInfo::vtable_call, "");
1036 }
1037 #endif
1038 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
1039 // it is not an interface. The receiver for invokespecial calls within interface
1040 // methods must be checked for every call.
1041 InstanceKlass* sender = pool->pool_holder();
1042 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1043
1044 switch (info.call_kind()) {
1045 case CallInfo::direct_call:
1046 cp_cache_entry->set_direct_call(
1047 bytecode,
1048 info.resolved_method(),
1049 sender->is_interface());
1050 break;
1051 case CallInfo::vtable_call:
1052 cp_cache_entry->set_vtable_call(
1053 bytecode,
1054 info.resolved_method(),
1055 info.vtable_index());
1056 break;
1057 case CallInfo::itable_call:
1058 cp_cache_entry->set_itable_call(
1059 bytecode,
1060 info.resolved_method(),
1061 info.itable_index());
1062 break;
1063 default: ShouldNotReachHere();
1064 }
1065 }
1066
1067
1068 // First time execution: Resolve symbols, create a permanent MethodType object.
1069 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
1070 Thread* THREAD = thread;
1071 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1072
1073 // resolve method
1074 CallInfo info;
1075 constantPoolHandle pool(thread, method(thread)->constants());
1076 {
1077 JvmtiHideSingleStepping jhss(thread);
1078 LinkResolver::resolve_invoke(info, Handle(), pool,
1079 get_index_u2_cpcache(thread, bytecode), bytecode,
1080 CHECK);
1081 } // end JvmtiHideSingleStepping
1082
1083 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
1084 cp_cache_entry->set_method_handle(pool, info);
1085 }
1086
1087 // First time execution: Resolve symbols, create a permanent CallSite object.
1088 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
1089 Thread* THREAD = thread;
1090 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1091
1092 //TO DO: consider passing BCI to Java.
1093 // int caller_bci = method(thread)->bci_from(bcp(thread));
1094
1095 // resolve method
1096 CallInfo info;
1097 constantPoolHandle pool(thread, method(thread)->constants());
1098 int index = get_index_u4(thread, bytecode);
1099 {
1100 JvmtiHideSingleStepping jhss(thread);
1101 LinkResolver::resolve_invoke(info, Handle(), pool,
1102 index, bytecode, CHECK);
1103 } // end JvmtiHideSingleStepping
1104
1105 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1106 cp_cache_entry->set_dynamic_call(pool, info);
1107 }
1108
1109 // This function is the interface to the assembly code. It returns the resolved
1110 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1111 // This function will check for redefinition!
1112 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1113 switch (bytecode) {
1114 case Bytecodes::_getstatic:
1115 case Bytecodes::_putstatic:
1116 case Bytecodes::_getfield:
1117 case Bytecodes::_putfield:
1118 case Bytecodes::_vgetfield:
1119 case Bytecodes::_vwithfield:
1120 resolve_get_put(thread, bytecode);
1121 break;
1122 case Bytecodes::_invokevirtual:
1123 case Bytecodes::_invokespecial:
1124 case Bytecodes::_invokestatic:
1125 case Bytecodes::_invokeinterface:
1126 resolve_invoke(thread, bytecode);
1127 break;
1128 case Bytecodes::_invokehandle:
1129 resolve_invokehandle(thread);
1130 break;
1131 case Bytecodes::_invokedynamic:
1132 resolve_invokedynamic(thread);
1133 break;
1134 default:
1135 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1136 break;
1137 }
1138 }
1139 IRT_END
1140
1141 //------------------------------------------------------------------------------------------------------------------------
1142 // Miscellaneous
1143
1144
1145 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1146 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1147 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1148 if (branch_bcp != NULL && nm != NULL) {
1149 // This was a successful request for an OSR nmethod. Because
1150 // frequency_counter_overflow_inner ends with a safepoint check,
1151 // nm could have been unloaded so look it up again. It's unsafe
1152 // to examine nm directly since it might have been freed and used
1153 // for something else.
1154 frame fr = thread->last_frame();
1155 Method* method = fr.interpreter_frame_method();
1156 int bci = method->bci_from(fr.interpreter_frame_bcp());
1157 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1158 }
1159 #ifndef PRODUCT
1160 if (TraceOnStackReplacement) {
1161 if (nm != NULL) {
1162 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1163 nm->print();
1164 }
1165 }
1166 #endif
1167 return nm;
1168 }
1169
1170 IRT_ENTRY(nmethod*,
1171 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1172 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1173 // flag, in case this method triggers classloading which will call into Java.
1174 UnlockFlagSaver fs(thread);
1175
1176 frame fr = thread->last_frame();
1177 assert(fr.is_interpreted_frame(), "must come from interpreter");
1178 methodHandle method(thread, fr.interpreter_frame_method());
1179 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1180 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
1181
1182 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1183 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1184 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1185
1186 if (osr_nm != NULL) {
1187 // We may need to do on-stack replacement which requires that no
1188 // monitors in the activation are biased because their
1189 // BasicObjectLocks will need to migrate during OSR. Force
1190 // unbiasing of all monitors in the activation now (even though
1191 // the OSR nmethod might be invalidated) because we don't have a
1192 // safepoint opportunity later once the migration begins.
1193 if (UseBiasedLocking) {
1194 ResourceMark rm;
1195 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1196 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
1197 kptr < fr.interpreter_frame_monitor_begin();
1198 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
1199 if( kptr->obj() != NULL ) {
1200 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1201 }
1202 }
1203 BiasedLocking::revoke(objects_to_revoke);
1204 }
1205 }
1206 return osr_nm;
1207 IRT_END
1208
1209 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1210 assert(ProfileInterpreter, "must be profiling interpreter");
1211 int bci = method->bci_from(cur_bcp);
1212 MethodData* mdo = method->method_data();
1213 if (mdo == NULL) return 0;
1214 return mdo->bci_to_di(bci);
1215 IRT_END
1216
1217 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1218 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1219 // flag, in case this method triggers classloading which will call into Java.
1220 UnlockFlagSaver fs(thread);
1221
1222 assert(ProfileInterpreter, "must be profiling interpreter");
1223 frame fr = thread->last_frame();
1224 assert(fr.is_interpreted_frame(), "must come from interpreter");
1225 methodHandle method(thread, fr.interpreter_frame_method());
1226 Method::build_interpreter_method_data(method, THREAD);
1227 if (HAS_PENDING_EXCEPTION) {
1228 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1229 CLEAR_PENDING_EXCEPTION;
1230 // and fall through...
1231 }
1232 IRT_END
1233
1234
1235 #ifdef ASSERT
1236 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1237 assert(ProfileInterpreter, "must be profiling interpreter");
1238
1239 MethodData* mdo = method->method_data();
1240 assert(mdo != NULL, "must not be null");
1241
1242 int bci = method->bci_from(bcp);
1243
1244 address mdp2 = mdo->bci_to_dp(bci);
1245 if (mdp != mdp2) {
1246 ResourceMark rm;
1247 ResetNoHandleMark rnm; // In a LEAF entry.
1248 HandleMark hm;
1249 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1250 int current_di = mdo->dp_to_di(mdp);
1251 int expected_di = mdo->dp_to_di(mdp2);
1252 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1253 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1254 int approx_bci = -1;
1255 if (current_di >= 0) {
1256 approx_bci = mdo->data_at(current_di)->bci();
1257 }
1258 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1259 mdo->print_on(tty);
1260 method->print_codes();
1261 }
1262 assert(mdp == mdp2, "wrong mdp");
1263 IRT_END
1264 #endif // ASSERT
1265
1266 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1267 assert(ProfileInterpreter, "must be profiling interpreter");
1268 ResourceMark rm(thread);
1269 HandleMark hm(thread);
1270 frame fr = thread->last_frame();
1271 assert(fr.is_interpreted_frame(), "must come from interpreter");
1272 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1273
1274 // Grab a lock to ensure atomic access to setting the return bci and
1275 // the displacement. This can block and GC, invalidating all naked oops.
1276 MutexLocker ml(RetData_lock);
1277
1278 // ProfileData is essentially a wrapper around a derived oop, so we
1279 // need to take the lock before making any ProfileData structures.
1280 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1281 RetData* rdata = data->as_RetData();
1282 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1283 fr.interpreter_frame_set_mdp(new_mdp);
1284 IRT_END
1285
1286 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1287 MethodCounters* mcs = Method::build_method_counters(m, thread);
1288 if (HAS_PENDING_EXCEPTION) {
1289 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1290 CLEAR_PENDING_EXCEPTION;
1291 }
1292 return mcs;
1293 IRT_END
1294
1295
1296 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1297 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1298 // stack traversal automatically takes care of preserving arguments for invoke, so
1299 // this is no longer needed.
1300
1301 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1302 // if this is called during a safepoint
1303
1304 if (JvmtiExport::should_post_single_step()) {
1305 // We are called during regular safepoints and when the VM is
1306 // single stepping. If any thread is marked for single stepping,
1307 // then we may have JVMTI work to do.
1308 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1309 }
1310 IRT_END
1311
1312 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1313 ConstantPoolCacheEntry *cp_entry))
1314
1315 // check the access_flags for the field in the klass
1316
1317 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1318 int index = cp_entry->field_index();
1319 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1320
1321 bool is_static = (obj == NULL);
1322 HandleMark hm(thread);
1323
1324 Handle h_obj;
1325 if (!is_static) {
1326 // non-static field accessors have an object, but we need a handle
1327 h_obj = Handle(thread, obj);
1328 }
1329 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1330 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1331 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), cp_entry_f1, h_obj, fid);
1332 IRT_END
1333
1334 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1335 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1336
1337 Klass* k = cp_entry->f1_as_klass();
1338
1339 // check the access_flags for the field in the klass
1340 InstanceKlass* ik = InstanceKlass::cast(k);
1341 int index = cp_entry->field_index();
1342 // bail out if field modifications are not watched
1343 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1344
1345 char sig_type = '\0';
1346
1347 switch(cp_entry->flag_state()) {
1348 case btos: sig_type = 'B'; break;
1349 case ztos: sig_type = 'Z'; break;
1350 case ctos: sig_type = 'C'; break;
1351 case stos: sig_type = 'S'; break;
1352 case itos: sig_type = 'I'; break;
1353 case ftos: sig_type = 'F'; break;
1354 case atos: sig_type = 'L'; break;
1355 case ltos: sig_type = 'J'; break;
1356 case dtos: sig_type = 'D'; break;
1357 default: ShouldNotReachHere(); return;
1358 }
1359 bool is_static = (obj == NULL);
1360
1361 HandleMark hm(thread);
1362 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1363 jvalue fvalue;
1364 #ifdef _LP64
1365 fvalue = *value;
1366 #else
1367 // Long/double values are stored unaligned and also noncontiguously with
1368 // tagged stacks. We can't just do a simple assignment even in the non-
1369 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1370 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1371 // We assume that the two halves of longs/doubles are stored in interpreter
1372 // stack slots in platform-endian order.
1373 jlong_accessor u;
1374 jint* newval = (jint*)value;
1375 u.words[0] = newval[0];
1376 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1377 fvalue.j = u.long_value;
1378 #endif // _LP64
1379
1380 Handle h_obj;
1381 if (!is_static) {
1382 // non-static field accessors have an object, but we need a handle
1383 h_obj = Handle(thread, obj);
1384 }
1385
1386 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), ik, h_obj,
1387 fid, sig_type, &fvalue);
1388 IRT_END
1389
1390 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1391 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1392 IRT_END
1393
1394
1395 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1396 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1397 IRT_END
1398
1399 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1400 {
1401 return (Interpreter::contains(pc) ? 1 : 0);
1402 }
1403 IRT_END
1404
1405
1406 // Implementation of SignatureHandlerLibrary
1407
1408 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1409 // Dummy definition (else normalization method is defined in CPU
1410 // dependant code)
1411 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1412 return fingerprint;
1413 }
1414 #endif
1415
1416 address SignatureHandlerLibrary::set_handler_blob() {
1417 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1418 if (handler_blob == NULL) {
1419 return NULL;
1420 }
1421 address handler = handler_blob->code_begin();
1422 _handler_blob = handler_blob;
1423 _handler = handler;
1424 return handler;
1425 }
1426
1427 void SignatureHandlerLibrary::initialize() {
1428 if (_fingerprints != NULL) {
1429 return;
1430 }
1431 if (set_handler_blob() == NULL) {
1432 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1433 }
1434
1435 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1436 SignatureHandlerLibrary::buffer_size);
1437 _buffer = bb->code_begin();
1438
1439 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1440 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1441 }
1442
1443 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1444 address handler = _handler;
1445 int insts_size = buffer->pure_insts_size();
1446 if (handler + insts_size > _handler_blob->code_end()) {
1447 // get a new handler blob
1448 handler = set_handler_blob();
1449 }
1450 if (handler != NULL) {
1451 memcpy(handler, buffer->insts_begin(), insts_size);
1452 pd_set_handler(handler);
1453 ICache::invalidate_range(handler, insts_size);
1454 _handler = handler + insts_size;
1455 }
1456 return handler;
1457 }
1458
1459 void SignatureHandlerLibrary::add(const methodHandle& method) {
1460 if (method->signature_handler() == NULL) {
1461 // use slow signature handler if we can't do better
1462 int handler_index = -1;
1463 // check if we can use customized (fast) signature handler
1464 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1465 // use customized signature handler
1466 MutexLocker mu(SignatureHandlerLibrary_lock);
1467 // make sure data structure is initialized
1468 initialize();
1469 // lookup method signature's fingerprint
1470 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1471 // allow CPU dependant code to optimize the fingerprints for the fast handler
1472 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1473 handler_index = _fingerprints->find(fingerprint);
1474 // create handler if necessary
1475 if (handler_index < 0) {
1476 ResourceMark rm;
1477 ptrdiff_t align_offset = (address)
1478 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1479 CodeBuffer buffer((address)(_buffer + align_offset),
1480 SignatureHandlerLibrary::buffer_size - align_offset);
1481 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1482 // copy into code heap
1483 address handler = set_handler(&buffer);
1484 if (handler == NULL) {
1485 // use slow signature handler (without memorizing it in the fingerprints)
1486 } else {
1487 // debugging suppport
1488 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1489 ttyLocker ttyl;
1490 tty->cr();
1491 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1492 _handlers->length(),
1493 (method->is_static() ? "static" : "receiver"),
1494 method->name_and_sig_as_C_string(),
1495 fingerprint,
1496 buffer.insts_size());
1497 if (buffer.insts_size() > 0) {
1498 Disassembler::decode(handler, handler + buffer.insts_size());
1499 }
1500 #ifndef PRODUCT
1501 address rh_begin = Interpreter::result_handler(method()->result_type());
1502 if (CodeCache::contains(rh_begin)) {
1503 // else it might be special platform dependent values
1504 tty->print_cr(" --- associated result handler ---");
1505 address rh_end = rh_begin;
1506 while (*(int*)rh_end != 0) {
1507 rh_end += sizeof(int);
1508 }
1509 Disassembler::decode(rh_begin, rh_end);
1510 } else {
1511 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1512 }
1513 #endif
1514 }
1515 // add handler to library
1516 _fingerprints->append(fingerprint);
1517 _handlers->append(handler);
1518 // set handler index
1519 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1520 handler_index = _fingerprints->length() - 1;
1521 }
1522 }
1523 // Set handler under SignatureHandlerLibrary_lock
1524 if (handler_index < 0) {
1525 // use generic signature handler
1526 method->set_signature_handler(Interpreter::slow_signature_handler());
1527 } else {
1528 // set handler
1529 method->set_signature_handler(_handlers->at(handler_index));
1530 }
1531 } else {
1532 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1533 // use generic signature handler
1534 method->set_signature_handler(Interpreter::slow_signature_handler());
1535 }
1536 }
1537 #ifdef ASSERT
1538 int handler_index = -1;
1539 int fingerprint_index = -2;
1540 {
1541 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1542 // in any way if accessed from multiple threads. To avoid races with another
1543 // thread which may change the arrays in the above, mutex protected block, we
1544 // have to protect this read access here with the same mutex as well!
1545 MutexLocker mu(SignatureHandlerLibrary_lock);
1546 if (_handlers != NULL) {
1547 handler_index = _handlers->find(method->signature_handler());
1548 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1549 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1550 fingerprint_index = _fingerprints->find(fingerprint);
1551 }
1552 }
1553 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1554 handler_index == fingerprint_index, "sanity check");
1555 #endif // ASSERT
1556 }
1557
1558 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1559 int handler_index = -1;
1560 // use customized signature handler
1561 MutexLocker mu(SignatureHandlerLibrary_lock);
1562 // make sure data structure is initialized
1563 initialize();
1564 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1565 handler_index = _fingerprints->find(fingerprint);
1566 // create handler if necessary
1567 if (handler_index < 0) {
1568 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1569 tty->cr();
1570 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1571 _handlers->length(),
1572 p2i(handler),
1573 fingerprint);
1574 }
1575 _fingerprints->append(fingerprint);
1576 _handlers->append(handler);
1577 } else {
1578 if (PrintSignatureHandlers) {
1579 tty->cr();
1580 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1581 _handlers->length(),
1582 fingerprint,
1583 p2i(_handlers->at(handler_index)),
1584 p2i(handler));
1585 }
1586 }
1587 }
1588
1589
1590 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1591 address SignatureHandlerLibrary::_handler = NULL;
1592 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1593 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1594 address SignatureHandlerLibrary::_buffer = NULL;
1595
1596
1597 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1598 methodHandle m(thread, method);
1599 assert(m->is_native(), "sanity check");
1600 // lookup native function entry point if it doesn't exist
1601 bool in_base_library;
1602 if (!m->has_native_function()) {
1603 NativeLookup::lookup(m, in_base_library, CHECK);
1604 }
1605 // make sure signature handler is installed
1606 SignatureHandlerLibrary::add(m);
1607 // The interpreter entry point checks the signature handler first,
1608 // before trying to fetch the native entry point and klass mirror.
1609 // We must set the signature handler last, so that multiple processors
1610 // preparing the same method will be sure to see non-null entry & mirror.
1611 IRT_END
1612
1613 #if defined(IA32) || defined(AMD64) || defined(ARM)
1614 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1615 if (src_address == dest_address) {
1616 return;
1617 }
1618 ResetNoHandleMark rnm; // In a LEAF entry.
1619 HandleMark hm;
1620 ResourceMark rm;
1621 frame fr = thread->last_frame();
1622 assert(fr.is_interpreted_frame(), "");
1623 jint bci = fr.interpreter_frame_bci();
1624 methodHandle mh(thread, fr.interpreter_frame_method());
1625 Bytecode_invoke invoke(mh, bci);
1626 ArgumentSizeComputer asc(invoke.signature());
1627 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1628 Copy::conjoint_jbytes(src_address, dest_address,
1629 size_of_arguments * Interpreter::stackElementSize);
1630 IRT_END
1631 #endif
1632
1633 #if INCLUDE_JVMTI
1634 // This is a support of the JVMTI PopFrame interface.
1635 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1636 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1637 // The member_name argument is a saved reference (in local#0) to the member_name.
1638 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1639 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1640 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1641 Method* method, address bcp))
1642 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1643 if (code != Bytecodes::_invokestatic) {
1644 return;
1645 }
1646 ConstantPool* cpool = method->constants();
1647 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1648 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1649 Symbol* mname = cpool->name_ref_at(cp_index);
1650
1651 if (MethodHandles::has_member_arg(cname, mname)) {
1652 oop member_name_oop = (oop) member_name;
1653 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1654 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1655 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1656 }
1657 thread->set_vm_result(member_name_oop);
1658 } else {
1659 thread->set_vm_result(NULL);
1660 }
1661 IRT_END
1662 #endif // INCLUDE_JVMTI
1663
1664 #ifndef PRODUCT
1665 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1666 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1667 // The generated code still uses call_VM because that will set up the frame pointer for
1668 // bcp and method.
1669 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1670 const frame f = thread->last_frame();
1671 assert(f.is_interpreted_frame(), "must be an interpreted frame");
1672 methodHandle mh(thread, f.interpreter_frame_method());
1673 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2);
1674 return preserve_this_value;
1675 IRT_END
1676 #endif // !PRODUCT