1 /*
2 * Copyright (c) 1997, 2021, 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 "jvm_io.h"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "classfile/vmClasses.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/codeCache.hpp"
33 #include "compiler/compilationPolicy.hpp"
34 #include "compiler/compileBroker.hpp"
35 #include "compiler/disassembler.hpp"
36 #include "gc/shared/barrierSetNMethod.hpp"
37 #include "gc/shared/collectedHeap.hpp"
38 #include "interpreter/interpreter.hpp"
39 #include "interpreter/interpreterRuntime.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "interpreter/templateTable.hpp"
42 #include "logging/log.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.hpp"
46 #include "oops/constantPool.hpp"
47 #include "oops/cpCache.inline.hpp"
48 #include "oops/flatArrayKlass.hpp"
49 #include "oops/flatArrayOop.inline.hpp"
50 #include "oops/inlineKlass.inline.hpp"
51 #include "oops/instanceKlass.inline.hpp"
52 #include "oops/klass.inline.hpp"
53 #include "oops/methodData.hpp"
54 #include "oops/objArrayKlass.hpp"
55 #include "oops/objArrayOop.inline.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "oops/symbol.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/methodHandles.hpp"
60 #include "prims/nativeLookup.hpp"
61 #include "runtime/atomic.hpp"
62 #include "runtime/deoptimization.hpp"
63 #include "runtime/fieldDescriptor.inline.hpp"
64 #include "runtime/frame.inline.hpp"
65 #include "runtime/handles.inline.hpp"
66 #include "runtime/icache.hpp"
67 #include "runtime/interfaceSupport.inline.hpp"
68 #include "runtime/java.hpp"
69 #include "runtime/javaCalls.hpp"
70 #include "runtime/jfieldIDWorkaround.hpp"
71 #include "runtime/osThread.hpp"
72 #include "runtime/sharedRuntime.hpp"
73 #include "runtime/stackWatermarkSet.hpp"
74 #include "runtime/stubRoutines.hpp"
75 #include "runtime/synchronizer.hpp"
76 #include "runtime/threadCritical.hpp"
77 #include "utilities/align.hpp"
78 #include "utilities/copy.hpp"
79 #include "utilities/events.hpp"
80 #include "utilities/globalDefinitions.hpp"
81 #ifdef COMPILER2
82 #include "opto/runtime.hpp"
83 #endif
84
85 // Helper class to access current interpreter state
86 class LastFrameAccessor : public StackObj {
87 frame _last_frame;
88 public:
89 LastFrameAccessor(JavaThread* current) {
90 assert(current == Thread::current(), "sanity");
91 _last_frame = current->last_frame();
92 }
93 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
94 Method* method() const { return _last_frame.interpreter_frame_method(); }
95 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
96 int bci() const { return _last_frame.interpreter_frame_bci(); }
97 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
98
99 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
100 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
101
102 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
103 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
104
105 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
106 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
107 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
108 int get_index_u2_cpcache(Bytecodes::Code bc) const
109 { return bytecode().get_index_u2_cpcache(bc); }
110 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
111 int number_of_dimensions() const { return bcp()[3]; }
112 ConstantPoolCacheEntry* cache_entry_at(int i) const
113 { return method()->constants()->cache()->entry_at(i); }
114 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
115
116 oop callee_receiver(Symbol* signature) {
117 return _last_frame.interpreter_callee_receiver(signature);
118 }
119 BasicObjectLock* monitor_begin() const {
120 return _last_frame.interpreter_frame_monitor_begin();
121 }
122 BasicObjectLock* monitor_end() const {
123 return _last_frame.interpreter_frame_monitor_end();
124 }
125 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
126 return _last_frame.next_monitor_in_interpreter_frame(current);
127 }
128
129 frame& get_frame() { return _last_frame; }
130 };
131
132 //------------------------------------------------------------------------------------------------------------------------
133 // State accessors
134
135 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
136 LastFrameAccessor last_frame(current);
137 last_frame.set_bcp(bcp);
138 if (ProfileInterpreter) {
139 // ProfileTraps uses MDOs independently of ProfileInterpreter.
140 // That is why we must check both ProfileInterpreter and mdo != NULL.
141 MethodData* mdo = last_frame.method()->method_data();
142 if (mdo != NULL) {
143 NEEDS_CLEANUP;
144 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
145 }
146 }
147 }
148
149 //------------------------------------------------------------------------------------------------------------------------
150 // Constants
151
152
153 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
154 // access constant pool
155 LastFrameAccessor last_frame(current);
156 ConstantPool* pool = last_frame.method()->constants();
157 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
158 constantTag tag = pool->tag_at(index);
159
160 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
161 Klass* klass = pool->klass_at(index, CHECK);
162 oop java_class = tag.is_Qdescriptor_klass()
163 ? InlineKlass::cast(klass)->val_mirror()
164 : klass->java_mirror();
165 current->set_vm_result(java_class);
166 JRT_END
167
168 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
169 assert(bytecode == Bytecodes::_ldc ||
170 bytecode == Bytecodes::_ldc_w ||
171 bytecode == Bytecodes::_ldc2_w ||
172 bytecode == Bytecodes::_fast_aldc ||
173 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
174 ResourceMark rm(current);
175 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
176 bytecode == Bytecodes::_fast_aldc_w);
177 LastFrameAccessor last_frame(current);
178 methodHandle m (current, last_frame.method());
179 Bytecode_loadconstant ldc(m, last_frame.bci());
180
181 // Double-check the size. (Condy can have any type.)
182 BasicType type = ldc.result_type();
183 switch (type2size[type]) {
184 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
185 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
186 default: ShouldNotReachHere();
187 }
188
189 // Resolve the constant. This does not do unboxing.
190 // But it does replace Universe::the_null_sentinel by null.
191 oop result = ldc.resolve_constant(CHECK);
192 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
193
194 #ifdef ASSERT
195 {
196 // The bytecode wrappers aren't GC-safe so construct a new one
197 Bytecode_loadconstant ldc2(m, last_frame.bci());
198 int rindex = ldc2.cache_index();
199 if (rindex < 0)
200 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
201 if (rindex >= 0) {
202 oop coop = m->constants()->resolved_references()->obj_at(rindex);
203 oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
204 assert(roop == coop, "expected result for assembly code");
205 }
206 }
207 #endif
208 current->set_vm_result(result);
209 if (!is_fast_aldc) {
210 // Tell the interpreter how to unbox the primitive.
211 guarantee(java_lang_boxing_object::is_instance(result, type), "");
212 int offset = java_lang_boxing_object::value_offset(type);
213 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
214 | (offset & ConstantPoolCacheEntry::field_index_mask));
215 current->set_vm_result_2((Metadata*)flags);
216 }
217 }
218 JRT_END
219
220
221 //------------------------------------------------------------------------------------------------------------------------
222 // Allocation
223
224 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
225 Klass* k = pool->klass_at(index, CHECK);
226 InstanceKlass* klass = InstanceKlass::cast(k);
227
228 if (klass->is_inline_klass()) {
229 THROW(vmSymbols::java_lang_InstantiationError());
230 }
231
232 // Make sure we are not instantiating an abstract klass
233 klass->check_valid_for_instantiation(true, CHECK);
234
235 // Make sure klass is initialized
236 klass->initialize(CHECK);
237
238 // At this point the class may not be fully initialized
239 // because of recursive initialization. If it is fully
240 // initialized & has_finalized is not set, we rewrite
241 // it into its fast version (Note: no locking is needed
242 // here since this is an atomic byte write and can be
243 // done more than once).
244 //
245 // Note: In case of classes with has_finalized we don't
246 // rewrite since that saves us an extra check in
247 // the fast version which then would call the
248 // slow version anyway (and do a call back into
249 // Java).
250 // If we have a breakpoint, then we don't rewrite
251 // because the _breakpoint bytecode would be lost.
252 oop obj = klass->allocate_instance(CHECK);
253 current->set_vm_result(obj);
254 JRT_END
255
256 JRT_ENTRY(void, InterpreterRuntime::aconst_init(JavaThread* current, ConstantPool* pool, int index))
257 // Getting the InlineKlass
258 Klass* k = pool->klass_at(index, CHECK);
259 if (!k->is_inline_klass()) {
260 // inconsistency with 'new' which throws an InstantiationError
261 // in the future, aconst_init will just return null instead of throwing an exception
262 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
263 }
264 assert(k->is_inline_klass(), "aconst_init argument must be the inline type class");
265 InlineKlass* vklass = InlineKlass::cast(k);
266
267 vklass->initialize(CHECK);
268 oop res = vklass->default_value();
269 current->set_vm_result(res);
270 JRT_END
271
272 JRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* current, ConstantPoolCacheEntry* cpe, uintptr_t ptr))
273 oop obj = NULL;
274 int recv_offset = type2size[as_BasicType(cpe->flag_state())];
275 assert(frame::interpreter_frame_expression_stack_direction() == -1, "currently is -1 on all platforms");
276 int ret_adj = (recv_offset + type2size[T_OBJECT] )* AbstractInterpreter::stackElementSize;
277 int offset = cpe->f2_as_offset();
278 obj = (oopDesc*)(((uintptr_t*)ptr)[recv_offset * Interpreter::stackElementWords]);
279 if (obj == NULL) {
280 THROW_(vmSymbols::java_lang_NullPointerException(), ret_adj);
281 }
282 assert(oopDesc::is_oop(obj), "Verifying receiver");
283 assert(obj->klass()->is_inline_klass(), "Must have been checked during resolution");
284 instanceHandle old_value_h(THREAD, (instanceOop)obj);
285 oop ref = NULL;
286 if (cpe->flag_state() == atos) {
287 ref = *(oopDesc**)ptr;
288 }
289 Handle ref_h(THREAD, ref);
290 InlineKlass* ik = InlineKlass::cast(old_value_h()->klass());
291 // Ensure that the class is initialized or being initialized
292 // If the class is in error state, the creation of a new value should not be allowed
293 ik->initialize(CHECK_(ret_adj));
294
295 bool can_skip = false;
296 switch(cpe->flag_state()) {
297 case ztos:
298 if (old_value_h()->bool_field(offset) == (jboolean)(*(jint*)ptr)) can_skip = true;
299 break;
300 case btos:
301 if (old_value_h()->byte_field(offset) == (jbyte)(*(jint*)ptr)) can_skip = true;
302 break;
303 case ctos:
304 if (old_value_h()->char_field(offset) == (jchar)(*(jint*)ptr)) can_skip = true;
305 break;
306 case stos:
307 if (old_value_h()->short_field(offset) == (jshort)(*(jint*)ptr)) can_skip = true;
308 break;
309 case itos:
310 if (old_value_h()->int_field(offset) == *(jint*)ptr) can_skip = true;
311 break;
312 case ltos:
313 if (old_value_h()->long_field(offset) == *(jlong*)ptr) can_skip = true;
314 break;
315 case ftos:
316 if (memcmp(old_value_h()->field_addr<jfloat>(offset), (jfloat*)ptr, sizeof(jfloat)) == 0) can_skip = true;
317 break;
318 case dtos:
319 if (memcmp(old_value_h()->field_addr<jdouble>(offset), (jdouble*)ptr, sizeof(jdouble)) == 0) can_skip = true;
320 break;
321 case atos:
322 if (!cpe->is_inlined() && old_value_h()->obj_field(offset) == ref_h()) can_skip = true;
323 break;
324 default:
325 break;
326 }
327 if (can_skip) {
328 current->set_vm_result(old_value_h());
329 return ret_adj;
330 }
331
332 instanceOop new_value = ik->allocate_instance_buffer(CHECK_(ret_adj));
333 Handle new_value_h = Handle(THREAD, new_value);
334 ik->inline_copy_oop_to_new_oop(old_value_h(), new_value_h());
335 switch(cpe->flag_state()) {
336 case ztos:
337 new_value_h()->bool_field_put(offset, (jboolean)(*(jint*)ptr));
338 break;
339 case btos:
340 new_value_h()->byte_field_put(offset, (jbyte)(*(jint*)ptr));
341 break;
342 case ctos:
343 new_value_h()->char_field_put(offset, (jchar)(*(jint*)ptr));
344 break;
345 case stos:
346 new_value_h()->short_field_put(offset, (jshort)(*(jint*)ptr));
347 break;
348 case itos:
349 new_value_h()->int_field_put(offset, (*(jint*)ptr));
350 break;
351 case ltos:
352 new_value_h()->long_field_put(offset, *(jlong*)ptr);
353 break;
354 case ftos:
355 new_value_h()->float_field_put(offset, *(jfloat*)ptr);
356 break;
357 case dtos:
358 new_value_h()->double_field_put(offset, *(jdouble*)ptr);
359 break;
360 case atos:
361 {
362 if (cpe->is_null_free_inline_type()) {
363 if (!cpe->is_inlined()) {
364 if (ref_h() == NULL) {
365 THROW_(vmSymbols::java_lang_NullPointerException(), ret_adj);
366 }
367 new_value_h()->obj_field_put(offset, ref_h());
368 } else {
369 int field_index = cpe->field_index();
370 InlineKlass* field_ik = InlineKlass::cast(ik->get_inline_type_field_klass(field_index));
371 field_ik->write_inlined_field(new_value_h(), offset, ref_h(), CHECK_(ret_adj));
372 }
373 } else {
374 new_value_h()->obj_field_put(offset, ref_h());
375 }
376 }
377 break;
378 default:
379 ShouldNotReachHere();
380 }
381 current->set_vm_result(new_value_h());
382 return ret_adj;
383 JRT_END
384
385 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_inline_type_field(JavaThread* current, oopDesc* mirror, int index))
386 // The interpreter tries to access an inline static field that has not been initialized.
387 // This situation can happen in different scenarios:
388 // 1 - if the load or initialization of the field failed during step 8 of
389 // the initialization of the holder of the field, in this case the access to the field
390 // must fail
391 // 2 - it can also happen when the initialization of the holder class triggered the initialization of
392 // another class which accesses this field in its static initializer, in this case the
393 // access must succeed to allow circularity
394 // The code below tries to load and initialize the field's class again before returning the default value.
395 // If the field was not initialized because of an error, an exception should be thrown.
396 // If the class is being initialized, the default value is returned.
397 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
398 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
399 assert(klass->field_signature(index)->is_Q_signature(), "Sanity check");
400 if (klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD)) {
401 int offset = klass->field_offset(index);
402 Klass* field_k = klass->get_inline_type_field_klass_or_null(index);
403 if (field_k == NULL) {
404 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD),
405 Handle(THREAD, klass->class_loader()),
406 Handle(THREAD, klass->protection_domain()),
407 true, CHECK);
408 assert(field_k != NULL, "Should have been loaded or an exception thrown above");
409 klass->set_inline_type_field_klass(index, field_k);
410 }
411 field_k->initialize(CHECK);
412 oop defaultvalue = InlineKlass::cast(field_k)->default_value();
413 // It is safe to initialize the static field because 1) the current thread is the initializing thread
414 // and is the only one that can access it, and 2) the field is actually not initialized (i.e. null)
415 // otherwise the JVM should not be executing this code.
416 mirror_h()->obj_field_put(offset, defaultvalue);
417 current->set_vm_result(defaultvalue);
418 } else {
419 assert(klass->is_in_error_state(), "If not initializing, initialization must have failed to get there");
420 ResourceMark rm(THREAD);
421 const char* desc = "Could not initialize class ";
422 const char* className = klass->external_name();
423 size_t msglen = strlen(desc) + strlen(className) + 1;
424 char* message = NEW_RESOURCE_ARRAY(char, msglen);
425 if (NULL == message) {
426 // Out of memory: can't create detailed error message
427 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);
428 } else {
429 jio_snprintf(message, msglen, "%s%s", desc, className);
430 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message);
431 }
432 }
433 JRT_END
434
435 JRT_ENTRY(void, InterpreterRuntime::read_inlined_field(JavaThread* current, oopDesc* obj, int index, Klass* field_holder))
436 Handle obj_h(THREAD, obj);
437
438 assert(oopDesc::is_oop(obj), "Sanity check");
439
440 assert(field_holder->is_instance_klass(), "Sanity check");
441 InstanceKlass* klass = InstanceKlass::cast(field_holder);
442
443 assert(klass->field_is_inlined(index), "Sanity check");
444
445 InlineKlass* field_vklass = InlineKlass::cast(klass->get_inline_type_field_klass(index));
446
447 oop res = field_vklass->read_inlined_field(obj_h(), klass->field_offset(index), CHECK);
448 current->set_vm_result(res);
449 JRT_END
450
451 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
452 oop obj = oopFactory::new_typeArray(type, size, CHECK);
453 current->set_vm_result(obj);
454 JRT_END
455
456
457 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
458 Klass* klass = pool->klass_at(index, CHECK);
459 bool is_qtype_desc = pool->tag_at(index).is_Qdescriptor_klass();
460 arrayOop obj;
461 if ((!klass->is_array_klass()) && is_qtype_desc) { // Logically creates elements, ensure klass init
462 klass->initialize(CHECK);
463 obj = oopFactory::new_valueArray(klass, size, CHECK);
464 } else {
465 obj = oopFactory::new_objArray(klass, size, CHECK);
466 }
467 current->set_vm_result(obj);
468 JRT_END
469
470 JRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* current, arrayOopDesc* array, int index))
471 flatArrayHandle vah(current, (flatArrayOop)array);
472 oop value_holder = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK);
473 current->set_vm_result(value_holder);
474 JRT_END
475
476 JRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* current, void* val, arrayOopDesc* array, int index))
477 assert(val != NULL, "can't store null into flat array");
478 ((flatArrayOop)array)->value_copy_to_index(cast_to_oop(val), index);
479 JRT_END
480
481 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
482 // We may want to pass in more arguments - could make this slightly faster
483 LastFrameAccessor last_frame(current);
484 ConstantPool* constants = last_frame.method()->constants();
485 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
486 Klass* klass = constants->klass_at(i, CHECK);
487 bool is_qtype = klass->name()->is_Q_array_signature();
488 int nof_dims = last_frame.number_of_dimensions();
489 assert(klass->is_klass(), "not a class");
490 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
491
492 if (is_qtype) { // Logically creates elements, ensure klass init
493 klass->initialize(CHECK);
494 }
495
496 // We must create an array of jints to pass to multi_allocate.
497 ResourceMark rm(current);
498 const int small_dims = 10;
499 jint dim_array[small_dims];
500 jint *dims = &dim_array[0];
501 if (nof_dims > small_dims) {
502 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
503 }
504 for (int index = 0; index < nof_dims; index++) {
505 // offset from first_size_address is addressed as local[index]
506 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
507 dims[index] = first_size_address[n];
508 }
509 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
510 current->set_vm_result(obj);
511 JRT_END
512
513
514 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
515 assert(oopDesc::is_oop(obj), "must be a valid oop");
516 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
517 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
518 JRT_END
519
520 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
521 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
522
523 Handle ha(THREAD, aobj);
524 Handle hb(THREAD, bobj);
525 JavaValue result(T_BOOLEAN);
526 JavaCallArguments args;
527 args.push_oop(ha);
528 args.push_oop(hb);
529 methodHandle method(current, Universe::is_substitutable_method());
530 JavaCalls::call(&result, method, &args, THREAD);
531 if (HAS_PENDING_EXCEPTION) {
532 // Something really bad happened because isSubstitutable() should not throw exceptions
533 // If it is an error, just let it propagate
534 // If it is an exception, wrap it into an InternalError
535 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
536 Handle e(THREAD, PENDING_EXCEPTION);
537 CLEAR_PENDING_EXCEPTION;
538 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
539 }
540 }
541 return result.get_jboolean();
542 JRT_END
543
544 // Quicken instance-of and check-cast bytecodes
545 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
546 // Force resolving; quicken the bytecode
547 LastFrameAccessor last_frame(current);
548 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
549 ConstantPool* cpool = last_frame.method()->constants();
550 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
551 // program we might have seen an unquick'd bytecode in the interpreter but have another
552 // thread quicken the bytecode before we get here.
553 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
554 Klass* klass = cpool->klass_at(which, CHECK);
555 current->set_vm_result_2(klass);
556 JRT_END
557
558
559 //------------------------------------------------------------------------------------------------------------------------
560 // Exceptions
561
562 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
563 const methodHandle& trap_method, int trap_bci) {
564 if (trap_method.not_null()) {
565 MethodData* trap_mdo = trap_method->method_data();
566 if (trap_mdo == NULL) {
567 ExceptionMark em(current);
568 JavaThread* THREAD = current; // For exception macros.
569 Method::build_interpreter_method_data(trap_method, THREAD);
570 if (HAS_PENDING_EXCEPTION) {
571 // Only metaspace OOM is expected. No Java code executed.
572 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
573 "we expect only an OOM error here");
574 CLEAR_PENDING_EXCEPTION;
575 }
576 trap_mdo = trap_method->method_data();
577 // and fall through...
578 }
579 if (trap_mdo != NULL) {
580 // Update per-method count of trap events. The interpreter
581 // is updating the MDO to simulate the effect of compiler traps.
582 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
583 }
584 }
585 }
586
587 // Assume the compiler is (or will be) interested in this event.
588 // If necessary, create an MDO to hold the information, and record it.
589 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
590 assert(ProfileTraps, "call me only if profiling");
591 LastFrameAccessor last_frame(current);
592 methodHandle trap_method(current, last_frame.method());
593 int trap_bci = trap_method->bci_from(last_frame.bcp());
594 note_trap_inner(current, reason, trap_method, trap_bci);
595 }
596
597 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
598 // get klass
599 InstanceKlass* klass = InstanceKlass::cast(k);
600 assert(klass->is_initialized(),
601 "this klass should have been initialized during VM initialization");
602 // create instance - do not call constructor since we may have no
603 // (java) stack space left (should assert constructor is empty)
604 Handle exception;
605 oop exception_oop = klass->allocate_instance(CHECK_(exception));
606 exception = Handle(THREAD, exception_oop);
607 if (StackTraceInThrowable) {
608 java_lang_Throwable::fill_in_stack_trace(exception);
609 }
610 return exception;
611 }
612
613 // Special handling for stack overflow: since we don't have any (java) stack
614 // space left we use the pre-allocated & pre-initialized StackOverflowError
615 // klass to create an stack overflow error instance. We do not call its
616 // constructor for the same reason (it is empty, anyway).
617 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
618 Handle exception = get_preinitialized_exception(
619 vmClasses::StackOverflowError_klass(),
620 CHECK);
621 // Increment counter for hs_err file reporting
622 Atomic::inc(&Exceptions::_stack_overflow_errors);
623 THROW_HANDLE(exception);
624 JRT_END
625
626 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
627 Handle exception = get_preinitialized_exception(
628 vmClasses::StackOverflowError_klass(),
629 CHECK);
630 java_lang_Throwable::set_message(exception(),
631 Universe::delayed_stack_overflow_error_message());
632 // Increment counter for hs_err file reporting
633 Atomic::inc(&Exceptions::_stack_overflow_errors);
634 THROW_HANDLE(exception);
635 JRT_END
636
637 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
638 // lookup exception klass
639 TempNewSymbol s = SymbolTable::new_symbol(name);
640 if (ProfileTraps) {
641 if (s == vmSymbols::java_lang_ArithmeticException()) {
642 note_trap(current, Deoptimization::Reason_div0_check);
643 } else if (s == vmSymbols::java_lang_NullPointerException()) {
644 note_trap(current, Deoptimization::Reason_null_check);
645 }
646 }
647 // create exception
648 Handle exception = Exceptions::new_exception(current, s, message);
649 current->set_vm_result(exception());
650 JRT_END
651
652
653 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
654 // Produce the error message first because note_trap can safepoint
655 ResourceMark rm(current);
656 const char* klass_name = obj->klass()->external_name();
657 // lookup exception klass
658 TempNewSymbol s = SymbolTable::new_symbol(name);
659 if (ProfileTraps) {
660 if (s == vmSymbols::java_lang_ArrayStoreException()) {
661 note_trap(current, Deoptimization::Reason_array_check);
662 } else {
663 note_trap(current, Deoptimization::Reason_class_check);
664 }
665 }
666 // create exception, with klass name as detail message
667 Handle exception = Exceptions::new_exception(current, s, klass_name);
668 current->set_vm_result(exception());
669 JRT_END
670
671 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
672 // Produce the error message first because note_trap can safepoint
673 ResourceMark rm(current);
674 stringStream ss;
675 ss.print("Index %d out of bounds for length %d", index, a->length());
676
677 if (ProfileTraps) {
678 note_trap(current, Deoptimization::Reason_range_check);
679 }
680
681 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
682 JRT_END
683
684 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
685 JavaThread* current, oopDesc* obj))
686
687 // Produce the error message first because note_trap can safepoint
688 ResourceMark rm(current);
689 char* message = SharedRuntime::generate_class_cast_message(
690 current, obj->klass());
691
692 if (ProfileTraps) {
693 note_trap(current, Deoptimization::Reason_class_check);
694 }
695
696 // create exception
697 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
698 JRT_END
699
700 // exception_handler_for_exception(...) returns the continuation address,
701 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
702 // The exception oop is returned to make sure it is preserved over GC (it
703 // is only on the stack if the exception was thrown explicitly via athrow).
704 // During this operation, the expression stack contains the values for the
705 // bci where the exception happened. If the exception was propagated back
706 // from a call, the expression stack contains the values for the bci at the
707 // invoke w/o arguments (i.e., as if one were inside the call).
708 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
709 // We get here after we have unwound from a callee throwing an exception
710 // into the interpreter. Any deferred stack processing is notified of
711 // the event via the StackWatermarkSet.
712 StackWatermarkSet::after_unwind(current);
713
714 LastFrameAccessor last_frame(current);
715 Handle h_exception(current, exception);
716 methodHandle h_method (current, last_frame.method());
717 constantPoolHandle h_constants(current, h_method->constants());
718 bool should_repeat;
719 int handler_bci;
720 int current_bci = last_frame.bci();
721
722 if (current->frames_to_pop_failed_realloc() > 0) {
723 // Allocation of scalar replaced object used in this frame
724 // failed. Unconditionally pop the frame.
725 current->dec_frames_to_pop_failed_realloc();
726 current->set_vm_result(h_exception());
727 // If the method is synchronized we already unlocked the monitor
728 // during deoptimization so the interpreter needs to skip it when
729 // the frame is popped.
730 current->set_do_not_unlock_if_synchronized(true);
731 return Interpreter::remove_activation_entry();
732 }
733
734 // Need to do this check first since when _do_not_unlock_if_synchronized
735 // is set, we don't want to trigger any classloading which may make calls
736 // into java, or surprisingly find a matching exception handler for bci 0
737 // since at this moment the method hasn't been "officially" entered yet.
738 if (current->do_not_unlock_if_synchronized()) {
739 ResourceMark rm;
740 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
741 current->set_vm_result(exception);
742 return Interpreter::remove_activation_entry();
743 }
744
745 do {
746 should_repeat = false;
747
748 // assertions
749 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
750 // Check that exception is a subclass of Throwable.
751 assert(h_exception->is_a(vmClasses::Throwable_klass()),
752 "Exception not subclass of Throwable");
753
754 // tracing
755 if (log_is_enabled(Info, exceptions)) {
756 ResourceMark rm(current);
757 stringStream tempst;
758 tempst.print("interpreter method <%s>\n"
759 " at bci %d for thread " INTPTR_FORMAT " (%s)",
760 h_method->print_value_string(), current_bci, p2i(current), current->name());
761 Exceptions::log_exception(h_exception, tempst.as_string());
762 }
763 // Don't go paging in something which won't be used.
764 // else if (extable->length() == 0) {
765 // // disabled for now - interpreter is not using shortcut yet
766 // // (shortcut is not to call runtime if we have no exception handlers)
767 // // warning("performance bug: should not call runtime if method has no exception handlers");
768 // }
769 // for AbortVMOnException flag
770 Exceptions::debug_check_abort(h_exception);
771
772 // exception handler lookup
773 Klass* klass = h_exception->klass();
774 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
775 if (HAS_PENDING_EXCEPTION) {
776 // We threw an exception while trying to find the exception handler.
777 // Transfer the new exception to the exception handle which will
778 // be set into thread local storage, and do another lookup for an
779 // exception handler for this exception, this time starting at the
780 // BCI of the exception handler which caused the exception to be
781 // thrown (bug 4307310).
782 h_exception = Handle(THREAD, PENDING_EXCEPTION);
783 CLEAR_PENDING_EXCEPTION;
784 if (handler_bci >= 0) {
785 current_bci = handler_bci;
786 should_repeat = true;
787 }
788 }
789 } while (should_repeat == true);
790
791 #if INCLUDE_JVMCI
792 if (EnableJVMCI && h_method->method_data() != NULL) {
793 ResourceMark rm(current);
794 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
795 if (pdata != NULL && pdata->is_BitData()) {
796 BitData* bit_data = (BitData*) pdata;
797 bit_data->set_exception_seen();
798 }
799 }
800 #endif
801
802 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
803 // time throw or a stack unwinding throw and accordingly notify the debugger
804 if (JvmtiExport::can_post_on_exceptions()) {
805 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
806 }
807
808 address continuation = NULL;
809 address handler_pc = NULL;
810 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
811 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
812 // handler in this method, or (b) after a stack overflow there is not yet
813 // enough stack space available to reprotect the stack.
814 continuation = Interpreter::remove_activation_entry();
815 #if COMPILER2_OR_JVMCI
816 // Count this for compilation purposes
817 h_method->interpreter_throwout_increment(THREAD);
818 #endif
819 } else {
820 // handler in this method => change bci/bcp to handler bci/bcp and continue there
821 handler_pc = h_method->code_base() + handler_bci;
822 #ifndef ZERO
823 set_bcp_and_mdp(handler_pc, current);
824 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
825 #else
826 continuation = (address)(intptr_t) handler_bci;
827 #endif
828 }
829
830 // notify debugger of an exception catch
831 // (this is good for exceptions caught in native methods as well)
832 if (JvmtiExport::can_post_on_exceptions()) {
833 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
834 }
835
836 current->set_vm_result(h_exception());
837 return continuation;
838 JRT_END
839
840
841 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
842 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
843 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
844 JRT_END
845
846
847 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
848 THROW(vmSymbols::java_lang_AbstractMethodError());
849 JRT_END
850
851 // This method is called from the "abstract_entry" of the interpreter.
852 // At that point, the arguments have already been removed from the stack
853 // and therefore we don't have the receiver object at our fingertips. (Though,
854 // on some platforms the receiver still resides in a register...). Thus,
855 // we have no choice but print an error message not containing the receiver
856 // type.
857 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
858 Method* missingMethod))
859 ResourceMark rm(current);
860 assert(missingMethod != NULL, "sanity");
861 methodHandle m(current, missingMethod);
862 LinkResolver::throw_abstract_method_error(m, THREAD);
863 JRT_END
864
865 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
866 Klass* recvKlass,
867 Method* missingMethod))
868 ResourceMark rm(current);
869 methodHandle mh = methodHandle(current, missingMethod);
870 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
871 JRT_END
872
873 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current))
874 THROW(vmSymbols::java_lang_InstantiationError());
875 JRT_END
876
877
878 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
879 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
880 JRT_END
881
882 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
883 Klass* recvKlass,
884 Klass* interfaceKlass))
885 ResourceMark rm(current);
886 char buf[1000];
887 buf[0] = '\0';
888 jio_snprintf(buf, sizeof(buf),
889 "Class %s does not implement the requested interface %s",
890 recvKlass ? recvKlass->external_name() : "NULL",
891 interfaceKlass ? interfaceKlass->external_name() : "NULL");
892 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
893 JRT_END
894
895 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
896 THROW(vmSymbols::java_lang_NullPointerException());
897 JRT_END
898
899 //------------------------------------------------------------------------------------------------------------------------
900 // Fields
901 //
902
903 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
904 // resolve field
905 fieldDescriptor info;
906 LastFrameAccessor last_frame(current);
907 constantPoolHandle pool(current, last_frame.method()->constants());
908 methodHandle m(current, last_frame.method());
909 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
910 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
911 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
912 bool is_inline_type = bytecode == Bytecodes::_withfield;
913
914 {
915 JvmtiHideSingleStepping jhss(current);
916 JavaThread* THREAD = current; // For exception macros.
917 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
918 m, bytecode, CHECK);
919 } // end JvmtiHideSingleStepping
920
921 // check if link resolution caused cpCache to be updated
922 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
923 if (cp_cache_entry->is_resolved(bytecode)) return;
924
925 // compute auxiliary field attributes
926 TosState state = as_TosState(info.field_type());
927
928 // Resolution of put instructions on final fields is delayed. That is required so that
929 // exceptions are thrown at the correct place (when the instruction is actually invoked).
930 // If we do not resolve an instruction in the current pass, leaving the put_code
931 // set to zero will cause the next put instruction to the same field to reresolve.
932
933 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
934 // to final instance fields with updates originating from a method different than <init>)
935 // is inhibited. A putfield instruction targeting an instance final field must throw
936 // an IllegalAccessError if the instruction is not in an instance
937 // initializer method <init>. If resolution were not inhibited, a putfield
938 // in an initializer method could be resolved in the initializer. Subsequent
939 // putfield instructions to the same field would then use cached information.
940 // As a result, those instructions would not pass through the VM. That is,
941 // checks in resolve_field_access() would not be executed for those instructions
942 // and the required IllegalAccessError would not be thrown.
943 //
944 // Also, we need to delay resolving getstatic and putstatic instructions until the
945 // class is initialized. This is required so that access to the static
946 // field will call the initialization function every time until the class
947 // is completely initialized ala. in 2.17.5 in JVM Specification.
948 InstanceKlass* klass = info.field_holder();
949 bool uninitialized_static = is_static && !klass->is_initialized();
950 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
951 info.has_initialized_final_update();
952 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
953
954 Bytecodes::Code get_code = (Bytecodes::Code)0;
955 Bytecodes::Code put_code = (Bytecodes::Code)0;
956 if (!uninitialized_static) {
957 if (is_static) {
958 get_code = Bytecodes::_getstatic;
959 } else {
960 get_code = Bytecodes::_getfield;
961 }
962 if (is_put && is_inline_type) {
963 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
964 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
965 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
966 }
967 }
968
969 cp_cache_entry->set_field(
970 get_code,
971 put_code,
972 info.field_holder(),
973 info.index(),
974 info.offset(),
975 state,
976 info.access_flags().is_final(),
977 info.access_flags().is_volatile(),
978 info.is_inlined(),
979 info.signature()->is_Q_signature() && info.is_inline_type()
980 );
981 }
982
983
984 //------------------------------------------------------------------------------------------------------------------------
985 // Synchronization
986 //
987 // The interpreter's synchronization code is factored out so that it can
988 // be shared by method invocation and synchronized blocks.
989 //%note synchronization_3
990
991 //%note monitor_1
992 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
993 #ifdef ASSERT
994 current->last_frame().interpreter_frame_verify_monitor(elem);
995 #endif
996 Handle h_obj(current, elem->obj());
997 assert(Universe::heap()->is_in_or_null(h_obj()),
998 "must be NULL or an object");
999 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
1000 assert(Universe::heap()->is_in_or_null(elem->obj()),
1001 "must be NULL or an object");
1002 #ifdef ASSERT
1003 current->last_frame().interpreter_frame_verify_monitor(elem);
1004 #endif
1005 JRT_END
1006
1007
1008 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
1009 oop obj = elem->obj();
1010 assert(Universe::heap()->is_in(obj), "must be an object");
1011 // The object could become unlocked through a JNI call, which we have no other checks for.
1012 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
1013 if (obj->is_unlocked()) {
1014 if (CheckJNICalls) {
1015 fatal("Object has been unlocked by JNI");
1016 }
1017 return;
1018 }
1019 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
1020 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
1021 // again at method exit or in the case of an exception.
1022 elem->set_obj(NULL);
1023 JRT_END
1024
1025
1026 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
1027 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
1028 JRT_END
1029
1030
1031 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
1032 // Returns an illegal exception to install into the current thread. The
1033 // pending_exception flag is cleared so normal exception handling does not
1034 // trigger. Any current installed exception will be overwritten. This
1035 // method will be called during an exception unwind.
1036
1037 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
1038 Handle exception(current, current->vm_result());
1039 assert(exception() != NULL, "vm result should be set");
1040 current->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
1041 if (!exception->is_a(vmClasses::ThreadDeath_klass())) {
1042 exception = get_preinitialized_exception(
1043 vmClasses::IllegalMonitorStateException_klass(),
1044 CATCH);
1045 }
1046 current->set_vm_result(exception());
1047 JRT_END
1048
1049
1050 //------------------------------------------------------------------------------------------------------------------------
1051 // Invokes
1052
1053 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
1054 return method->orig_bytecode_at(method->bci_from(bcp));
1055 JRT_END
1056
1057 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
1058 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
1059 JRT_END
1060
1061 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
1062 JvmtiExport::post_raw_breakpoint(current, method, bcp);
1063 JRT_END
1064
1065 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
1066 LastFrameAccessor last_frame(current);
1067 // extract receiver from the outgoing argument list if necessary
1068 Handle receiver(current, NULL);
1069 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1070 bytecode == Bytecodes::_invokespecial) {
1071 ResourceMark rm(current);
1072 methodHandle m (current, last_frame.method());
1073 Bytecode_invoke call(m, last_frame.bci());
1074 Symbol* signature = call.signature();
1075 receiver = Handle(current, last_frame.callee_receiver(signature));
1076
1077 assert(Universe::heap()->is_in_or_null(receiver()),
1078 "sanity check");
1079 assert(receiver.is_null() ||
1080 !Universe::heap()->is_in(receiver->klass()),
1081 "sanity check");
1082 }
1083
1084 // resolve method
1085 CallInfo info;
1086 constantPoolHandle pool(current, last_frame.method()->constants());
1087
1088 methodHandle resolved_method;
1089
1090 {
1091 JvmtiHideSingleStepping jhss(current);
1092 JavaThread* THREAD = current; // For exception macros.
1093 LinkResolver::resolve_invoke(info, receiver, pool,
1094 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1095 THREAD);
1096
1097 if (HAS_PENDING_EXCEPTION) {
1098 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
1099 // Preserve the original exception across the call to note_trap()
1100 PreserveExceptionMark pm(current);
1101 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
1102 note_trap(current, Deoptimization::Reason_null_check);
1103 }
1104 return;
1105 }
1106
1107 if (JvmtiExport::can_hotswap_or_post_breakpoint() && info.resolved_method()->is_old()) {
1108 resolved_method = methodHandle(current, info.resolved_method()->get_new_method());
1109 } else {
1110 resolved_method = methodHandle(current, info.resolved_method());
1111 }
1112 } // end JvmtiHideSingleStepping
1113
1114 // check if link resolution caused cpCache to be updated
1115 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1116 if (cp_cache_entry->is_resolved(bytecode)) return;
1117
1118 #ifdef ASSERT
1119 if (bytecode == Bytecodes::_invokeinterface) {
1120 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
1121 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1122 // (see also CallInfo::set_interface for details)
1123 assert(info.call_kind() == CallInfo::vtable_call ||
1124 info.call_kind() == CallInfo::direct_call, "");
1125 assert(resolved_method->is_final() || info.has_vtable_index(),
1126 "should have been set already");
1127 } else if (!resolved_method->has_itable_index()) {
1128 // Resolved something like CharSequence.toString. Use vtable not itable.
1129 assert(info.call_kind() != CallInfo::itable_call, "");
1130 } else {
1131 // Setup itable entry
1132 assert(info.call_kind() == CallInfo::itable_call, "");
1133 int index = resolved_method->itable_index();
1134 assert(info.itable_index() == index, "");
1135 }
1136 } else if (bytecode == Bytecodes::_invokespecial) {
1137 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1138 } else {
1139 assert(info.call_kind() == CallInfo::direct_call ||
1140 info.call_kind() == CallInfo::vtable_call, "");
1141 }
1142 #endif
1143 // Get sender and only set cpCache entry to resolved if it is not an
1144 // interface. The receiver for invokespecial calls within interface
1145 // methods must be checked for every call.
1146 InstanceKlass* sender = pool->pool_holder();
1147
1148 switch (info.call_kind()) {
1149 case CallInfo::direct_call:
1150 cp_cache_entry->set_direct_call(
1151 bytecode,
1152 resolved_method,
1153 sender->is_interface());
1154 break;
1155 case CallInfo::vtable_call:
1156 cp_cache_entry->set_vtable_call(
1157 bytecode,
1158 resolved_method,
1159 info.vtable_index());
1160 break;
1161 case CallInfo::itable_call:
1162 cp_cache_entry->set_itable_call(
1163 bytecode,
1164 info.resolved_klass(),
1165 resolved_method,
1166 info.itable_index());
1167 break;
1168 default: ShouldNotReachHere();
1169 }
1170 }
1171
1172
1173 // First time execution: Resolve symbols, create a permanent MethodType object.
1174 void InterpreterRuntime::resolve_invokehandle(JavaThread* current) {
1175 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1176 LastFrameAccessor last_frame(current);
1177
1178 // resolve method
1179 CallInfo info;
1180 constantPoolHandle pool(current, last_frame.method()->constants());
1181 {
1182 JvmtiHideSingleStepping jhss(current);
1183 JavaThread* THREAD = current; // For exception macros.
1184 LinkResolver::resolve_invoke(info, Handle(), pool,
1185 last_frame.get_index_u2_cpcache(bytecode), bytecode,
1186 CHECK);
1187 } // end JvmtiHideSingleStepping
1188
1189 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
1190 cp_cache_entry->set_method_handle(pool, info);
1191 }
1192
1193 // First time execution: Resolve symbols, create a permanent CallSite object.
1194 void InterpreterRuntime::resolve_invokedynamic(JavaThread* current) {
1195 LastFrameAccessor last_frame(current);
1196 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1197
1198 // resolve method
1199 CallInfo info;
1200 constantPoolHandle pool(current, last_frame.method()->constants());
1201 int index = last_frame.get_index_u4(bytecode);
1202 {
1203 JvmtiHideSingleStepping jhss(current);
1204 JavaThread* THREAD = current; // For exception macros.
1205 LinkResolver::resolve_invoke(info, Handle(), pool,
1206 index, bytecode, CHECK);
1207 } // end JvmtiHideSingleStepping
1208
1209 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1210 cp_cache_entry->set_dynamic_call(pool, info);
1211 }
1212
1213 // This function is the interface to the assembly code. It returns the resolved
1214 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1215 // This function will check for redefinition!
1216 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1217 switch (bytecode) {
1218 case Bytecodes::_getstatic:
1219 case Bytecodes::_putstatic:
1220 case Bytecodes::_getfield:
1221 case Bytecodes::_putfield:
1222 case Bytecodes::_withfield:
1223 resolve_get_put(current, bytecode);
1224 break;
1225 case Bytecodes::_invokevirtual:
1226 case Bytecodes::_invokespecial:
1227 case Bytecodes::_invokestatic:
1228 case Bytecodes::_invokeinterface:
1229 resolve_invoke(current, bytecode);
1230 break;
1231 case Bytecodes::_invokehandle:
1232 resolve_invokehandle(current);
1233 break;
1234 case Bytecodes::_invokedynamic:
1235 resolve_invokedynamic(current);
1236 break;
1237 default:
1238 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1239 break;
1240 }
1241 }
1242 JRT_END
1243
1244 //------------------------------------------------------------------------------------------------------------------------
1245 // Miscellaneous
1246
1247
1248 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1249 // Enable WXWrite: the function is called directly by interpreter.
1250 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1251
1252 // frequency_counter_overflow_inner can throw async exception.
1253 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1254 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1255 if (branch_bcp != NULL && nm != NULL) {
1256 // This was a successful request for an OSR nmethod. Because
1257 // frequency_counter_overflow_inner ends with a safepoint check,
1258 // nm could have been unloaded so look it up again. It's unsafe
1259 // to examine nm directly since it might have been freed and used
1260 // for something else.
1261 LastFrameAccessor last_frame(current);
1262 Method* method = last_frame.method();
1263 int bci = method->bci_from(last_frame.bcp());
1264 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1265 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1266 if (nm != NULL && bs_nm != NULL) {
1267 // in case the transition passed a safepoint we need to barrier this again
1268 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1269 nm = NULL;
1270 }
1271 }
1272 }
1273 if (nm != NULL && current->is_interp_only_mode()) {
1274 // Normally we never get an nm if is_interp_only_mode() is true, because
1275 // policy()->event has a check for this and won't compile the method when
1276 // true. However, it's possible for is_interp_only_mode() to become true
1277 // during the compilation. We don't want to return the nm in that case
1278 // because we want to continue to execute interpreted.
1279 nm = NULL;
1280 }
1281 #ifndef PRODUCT
1282 if (TraceOnStackReplacement) {
1283 if (nm != NULL) {
1284 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1285 nm->print();
1286 }
1287 }
1288 #endif
1289 return nm;
1290 }
1291
1292 JRT_ENTRY(nmethod*,
1293 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1294 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1295 // flag, in case this method triggers classloading which will call into Java.
1296 UnlockFlagSaver fs(current);
1297
1298 LastFrameAccessor last_frame(current);
1299 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1300 methodHandle method(current, last_frame.method());
1301 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1302 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1303
1304 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, NULL, CHECK_NULL);
1305
1306 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1307 if (osr_nm != NULL && bs_nm != NULL) {
1308 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1309 osr_nm = NULL;
1310 }
1311 }
1312 return osr_nm;
1313 JRT_END
1314
1315 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1316 assert(ProfileInterpreter, "must be profiling interpreter");
1317 int bci = method->bci_from(cur_bcp);
1318 MethodData* mdo = method->method_data();
1319 if (mdo == NULL) return 0;
1320 return mdo->bci_to_di(bci);
1321 JRT_END
1322
1323 #ifdef ASSERT
1324 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1325 assert(ProfileInterpreter, "must be profiling interpreter");
1326
1327 MethodData* mdo = method->method_data();
1328 assert(mdo != NULL, "must not be null");
1329
1330 int bci = method->bci_from(bcp);
1331
1332 address mdp2 = mdo->bci_to_dp(bci);
1333 if (mdp != mdp2) {
1334 ResourceMark rm;
1335 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1336 int current_di = mdo->dp_to_di(mdp);
1337 int expected_di = mdo->dp_to_di(mdp2);
1338 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1339 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1340 int approx_bci = -1;
1341 if (current_di >= 0) {
1342 approx_bci = mdo->data_at(current_di)->bci();
1343 }
1344 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1345 mdo->print_on(tty);
1346 method->print_codes();
1347 }
1348 assert(mdp == mdp2, "wrong mdp");
1349 JRT_END
1350 #endif // ASSERT
1351
1352 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1353 assert(ProfileInterpreter, "must be profiling interpreter");
1354 ResourceMark rm(current);
1355 LastFrameAccessor last_frame(current);
1356 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1357 MethodData* h_mdo = last_frame.method()->method_data();
1358
1359 // Grab a lock to ensure atomic access to setting the return bci and
1360 // the displacement. This can block and GC, invalidating all naked oops.
1361 MutexLocker ml(RetData_lock);
1362
1363 // ProfileData is essentially a wrapper around a derived oop, so we
1364 // need to take the lock before making any ProfileData structures.
1365 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1366 guarantee(data != NULL, "profile data must be valid");
1367 RetData* rdata = data->as_RetData();
1368 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1369 last_frame.set_mdp(new_mdp);
1370 JRT_END
1371
1372 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1373 return Method::build_method_counters(current, m);
1374 JRT_END
1375
1376
1377 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1378 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1379 // stack traversal automatically takes care of preserving arguments for invoke, so
1380 // this is no longer needed.
1381
1382 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1383 // if this is called during a safepoint
1384
1385 if (JvmtiExport::should_post_single_step()) {
1386 // This function is called by the interpreter when single stepping. Such single
1387 // stepping could unwind a frame. Then, it is important that we process any frames
1388 // that we might return into.
1389 StackWatermarkSet::before_unwind(current);
1390
1391 // We are called during regular safepoints and when the VM is
1392 // single stepping. If any thread is marked for single stepping,
1393 // then we may have JVMTI work to do.
1394 LastFrameAccessor last_frame(current);
1395 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1396 }
1397 JRT_END
1398
1399 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1400 // This function is called by the interpreter when the return poll found a reason
1401 // to call the VM. The reason could be that we are returning into a not yet safe
1402 // to access frame. We handle that below.
1403 // Note that this path does not check for single stepping, because we do not want
1404 // to single step when unwinding frames for an exception being thrown. Instead,
1405 // such single stepping code will use the safepoint table, which will use the
1406 // InterpreterRuntime::at_safepoint callback.
1407 StackWatermarkSet::before_unwind(current);
1408 JRT_END
1409
1410 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1411 ConstantPoolCacheEntry *cp_entry))
1412
1413 // check the access_flags for the field in the klass
1414
1415 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1416 int index = cp_entry->field_index();
1417 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1418
1419 bool is_static = (obj == NULL);
1420 bool is_inlined = cp_entry->is_inlined();
1421 HandleMark hm(current);
1422
1423 Handle h_obj;
1424 if (!is_static) {
1425 // non-static field accessors have an object, but we need a handle
1426 h_obj = Handle(current, obj);
1427 }
1428 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1429 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static, is_inlined);
1430 LastFrameAccessor last_frame(current);
1431 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1432 JRT_END
1433
1434 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1435 ConstantPoolCacheEntry *cp_entry, jvalue *value))
1436
1437 Klass* k = cp_entry->f1_as_klass();
1438
1439 // check the access_flags for the field in the klass
1440 InstanceKlass* ik = InstanceKlass::cast(k);
1441 int index = cp_entry->field_index();
1442 // bail out if field modifications are not watched
1443 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1444
1445 char sig_type = '\0';
1446
1447 switch(cp_entry->flag_state()) {
1448 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1449 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1450 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1451 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1452 case itos: sig_type = JVM_SIGNATURE_INT; break;
1453 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1454 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1455 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1456 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1457 default: ShouldNotReachHere(); return;
1458 }
1459
1460 // Both Q-signatures and L-signatures are mapped to atos
1461 if (cp_entry->flag_state() == atos && ik->field_signature(index)->is_Q_signature()) {
1462 sig_type = JVM_SIGNATURE_PRIMITIVE_OBJECT;
1463 }
1464
1465 bool is_static = (obj == NULL);
1466 bool is_inlined = cp_entry->is_inlined();
1467
1468 HandleMark hm(current);
1469 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static, is_inlined);
1470 jvalue fvalue;
1471 #ifdef _LP64
1472 fvalue = *value;
1473 #else
1474 // Long/double values are stored unaligned and also noncontiguously with
1475 // tagged stacks. We can't just do a simple assignment even in the non-
1476 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1477 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1478 // We assume that the two halves of longs/doubles are stored in interpreter
1479 // stack slots in platform-endian order.
1480 jlong_accessor u;
1481 jint* newval = (jint*)value;
1482 u.words[0] = newval[0];
1483 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1484 fvalue.j = u.long_value;
1485 #endif // _LP64
1486
1487 Handle h_obj;
1488 if (!is_static) {
1489 // non-static field accessors have an object, but we need a handle
1490 h_obj = Handle(current, obj);
1491 }
1492
1493 LastFrameAccessor last_frame(current);
1494 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1495 fid, sig_type, &fvalue);
1496 JRT_END
1497
1498 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1499 LastFrameAccessor last_frame(current);
1500 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1501 JRT_END
1502
1503
1504 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1505 // before transitioning to VM, and restore it after transitioning back
1506 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1507 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1508 LastFrameAccessor last_frame(current);
1509 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1510 JRT_END
1511
1512 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1513 {
1514 return (Interpreter::contains(pc) ? 1 : 0);
1515 }
1516 JRT_END
1517
1518
1519 // Implementation of SignatureHandlerLibrary
1520
1521 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1522 // Dummy definition (else normalization method is defined in CPU
1523 // dependant code)
1524 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1525 return fingerprint;
1526 }
1527 #endif
1528
1529 address SignatureHandlerLibrary::set_handler_blob() {
1530 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1531 if (handler_blob == NULL) {
1532 return NULL;
1533 }
1534 address handler = handler_blob->code_begin();
1535 _handler_blob = handler_blob;
1536 _handler = handler;
1537 return handler;
1538 }
1539
1540 void SignatureHandlerLibrary::initialize() {
1541 if (_fingerprints != NULL) {
1542 return;
1543 }
1544 if (set_handler_blob() == NULL) {
1545 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1546 }
1547
1548 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1549 SignatureHandlerLibrary::buffer_size);
1550 _buffer = bb->code_begin();
1551
1552 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, mtCode);
1553 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, mtCode);
1554 }
1555
1556 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1557 address handler = _handler;
1558 int insts_size = buffer->pure_insts_size();
1559 if (handler + insts_size > _handler_blob->code_end()) {
1560 // get a new handler blob
1561 handler = set_handler_blob();
1562 }
1563 if (handler != NULL) {
1564 memcpy(handler, buffer->insts_begin(), insts_size);
1565 pd_set_handler(handler);
1566 ICache::invalidate_range(handler, insts_size);
1567 _handler = handler + insts_size;
1568 }
1569 return handler;
1570 }
1571
1572 void SignatureHandlerLibrary::add(const methodHandle& method) {
1573 if (method->signature_handler() == NULL) {
1574 // use slow signature handler if we can't do better
1575 int handler_index = -1;
1576 // check if we can use customized (fast) signature handler
1577 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1578 // use customized signature handler
1579 MutexLocker mu(SignatureHandlerLibrary_lock);
1580 // make sure data structure is initialized
1581 initialize();
1582 // lookup method signature's fingerprint
1583 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1584 // allow CPU dependant code to optimize the fingerprints for the fast handler
1585 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1586 handler_index = _fingerprints->find(fingerprint);
1587 // create handler if necessary
1588 if (handler_index < 0) {
1589 ResourceMark rm;
1590 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1591 CodeBuffer buffer((address)(_buffer + align_offset),
1592 SignatureHandlerLibrary::buffer_size - align_offset);
1593 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1594 // copy into code heap
1595 address handler = set_handler(&buffer);
1596 if (handler == NULL) {
1597 // use slow signature handler (without memorizing it in the fingerprints)
1598 } else {
1599 // debugging suppport
1600 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1601 ttyLocker ttyl;
1602 tty->cr();
1603 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1604 _handlers->length(),
1605 (method->is_static() ? "static" : "receiver"),
1606 method->name_and_sig_as_C_string(),
1607 fingerprint,
1608 buffer.insts_size());
1609 if (buffer.insts_size() > 0) {
1610 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1611 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1612 }
1613 #ifndef PRODUCT
1614 address rh_begin = Interpreter::result_handler(method()->result_type());
1615 if (CodeCache::contains(rh_begin)) {
1616 // else it might be special platform dependent values
1617 tty->print_cr(" --- associated result handler ---");
1618 address rh_end = rh_begin;
1619 while (*(int*)rh_end != 0) {
1620 rh_end += sizeof(int);
1621 }
1622 Disassembler::decode(rh_begin, rh_end);
1623 } else {
1624 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1625 }
1626 #endif
1627 }
1628 // add handler to library
1629 _fingerprints->append(fingerprint);
1630 _handlers->append(handler);
1631 // set handler index
1632 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1633 handler_index = _fingerprints->length() - 1;
1634 }
1635 }
1636 // Set handler under SignatureHandlerLibrary_lock
1637 if (handler_index < 0) {
1638 // use generic signature handler
1639 method->set_signature_handler(Interpreter::slow_signature_handler());
1640 } else {
1641 // set handler
1642 method->set_signature_handler(_handlers->at(handler_index));
1643 }
1644 } else {
1645 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1646 // use generic signature handler
1647 method->set_signature_handler(Interpreter::slow_signature_handler());
1648 }
1649 }
1650 #ifdef ASSERT
1651 int handler_index = -1;
1652 int fingerprint_index = -2;
1653 {
1654 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1655 // in any way if accessed from multiple threads. To avoid races with another
1656 // thread which may change the arrays in the above, mutex protected block, we
1657 // have to protect this read access here with the same mutex as well!
1658 MutexLocker mu(SignatureHandlerLibrary_lock);
1659 if (_handlers != NULL) {
1660 handler_index = _handlers->find(method->signature_handler());
1661 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1662 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1663 fingerprint_index = _fingerprints->find(fingerprint);
1664 }
1665 }
1666 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1667 handler_index == fingerprint_index, "sanity check");
1668 #endif // ASSERT
1669 }
1670
1671 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1672 int handler_index = -1;
1673 // use customized signature handler
1674 MutexLocker mu(SignatureHandlerLibrary_lock);
1675 // make sure data structure is initialized
1676 initialize();
1677 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1678 handler_index = _fingerprints->find(fingerprint);
1679 // create handler if necessary
1680 if (handler_index < 0) {
1681 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1682 tty->cr();
1683 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1684 _handlers->length(),
1685 p2i(handler),
1686 fingerprint);
1687 }
1688 _fingerprints->append(fingerprint);
1689 _handlers->append(handler);
1690 } else {
1691 if (PrintSignatureHandlers) {
1692 tty->cr();
1693 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1694 _handlers->length(),
1695 fingerprint,
1696 p2i(_handlers->at(handler_index)),
1697 p2i(handler));
1698 }
1699 }
1700 }
1701
1702
1703 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1704 address SignatureHandlerLibrary::_handler = NULL;
1705 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1706 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1707 address SignatureHandlerLibrary::_buffer = NULL;
1708
1709
1710 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1711 methodHandle m(current, method);
1712 assert(m->is_native(), "sanity check");
1713 // lookup native function entry point if it doesn't exist
1714 if (!m->has_native_function()) {
1715 NativeLookup::lookup(m, CHECK);
1716 }
1717 // make sure signature handler is installed
1718 SignatureHandlerLibrary::add(m);
1719 // The interpreter entry point checks the signature handler first,
1720 // before trying to fetch the native entry point and klass mirror.
1721 // We must set the signature handler last, so that multiple processors
1722 // preparing the same method will be sure to see non-null entry & mirror.
1723 JRT_END
1724
1725 #if defined(IA32) || defined(AMD64) || defined(ARM)
1726 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1727 if (src_address == dest_address) {
1728 return;
1729 }
1730 ResourceMark rm;
1731 LastFrameAccessor last_frame(current);
1732 assert(last_frame.is_interpreted_frame(), "");
1733 jint bci = last_frame.bci();
1734 methodHandle mh(current, last_frame.method());
1735 Bytecode_invoke invoke(mh, bci);
1736 ArgumentSizeComputer asc(invoke.signature());
1737 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1738 Copy::conjoint_jbytes(src_address, dest_address,
1739 size_of_arguments * Interpreter::stackElementSize);
1740 JRT_END
1741 #endif
1742
1743 #if INCLUDE_JVMTI
1744 // This is a support of the JVMTI PopFrame interface.
1745 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1746 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1747 // The member_name argument is a saved reference (in local#0) to the member_name.
1748 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1749 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1750 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1751 Method* method, address bcp))
1752 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1753 if (code != Bytecodes::_invokestatic) {
1754 return;
1755 }
1756 ConstantPool* cpool = method->constants();
1757 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1758 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1759 Symbol* mname = cpool->name_ref_at(cp_index);
1760
1761 if (MethodHandles::has_member_arg(cname, mname)) {
1762 oop member_name_oop = cast_to_oop(member_name);
1763 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1764 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1765 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1766 }
1767 current->set_vm_result(member_name_oop);
1768 } else {
1769 current->set_vm_result(NULL);
1770 }
1771 JRT_END
1772 #endif // INCLUDE_JVMTI
1773
1774 #ifndef PRODUCT
1775 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1776 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1777 // The generated code still uses call_VM because that will set up the frame pointer for
1778 // bcp and method.
1779 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1780 LastFrameAccessor last_frame(current);
1781 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1782 methodHandle mh(current, last_frame.method());
1783 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1784 return preserve_this_value;
1785 JRT_END
1786 #endif // !PRODUCT