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