1 /*
2 * Copyright (c) 1997, 2025, 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 "classfile/javaClasses.inline.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmClasses.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "compiler/compilationPolicy.hpp"
32 #include "compiler/compileBroker.hpp"
33 #include "compiler/disassembler.hpp"
34 #include "gc/shared/barrierSetNMethod.hpp"
35 #include "gc/shared/collectedHeap.hpp"
36 #include "interpreter/bytecodeTracer.hpp"
37 #include "interpreter/interpreter.hpp"
38 #include "interpreter/interpreterRuntime.hpp"
39 #include "interpreter/linkResolver.hpp"
40 #include "interpreter/templateTable.hpp"
41 #include "jvm_io.h"
42 #include "logging/log.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.hpp"
46 #include "oops/constantPool.inline.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/method.inline.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/methodHandles.hpp"
61 #include "prims/nativeLookup.hpp"
62 #include "runtime/atomic.hpp"
63 #include "runtime/continuation.hpp"
64 #include "runtime/deoptimization.hpp"
65 #include "runtime/fieldDescriptor.inline.hpp"
66 #include "runtime/frame.inline.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/icache.hpp"
69 #include "runtime/interfaceSupport.inline.hpp"
70 #include "runtime/java.hpp"
71 #include "runtime/javaCalls.hpp"
72 #include "runtime/jfieldIDWorkaround.hpp"
73 #include "runtime/osThread.hpp"
74 #include "runtime/sharedRuntime.hpp"
75 #include "runtime/stackWatermarkSet.hpp"
76 #include "runtime/stubRoutines.hpp"
77 #include "runtime/synchronizer.inline.hpp"
78 #include "runtime/threadCritical.hpp"
79 #include "utilities/align.hpp"
80 #include "utilities/checkedCast.hpp"
81 #include "utilities/copy.hpp"
82 #include "utilities/events.hpp"
83 #include "utilities/globalDefinitions.hpp"
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_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
109 int number_of_dimensions() const { return bcp()[3]; }
110
111 oop callee_receiver(Symbol* signature) {
112 return _last_frame.interpreter_callee_receiver(signature);
113 }
114 BasicObjectLock* monitor_begin() const {
115 return _last_frame.interpreter_frame_monitor_begin();
116 }
117 BasicObjectLock* monitor_end() const {
118 return _last_frame.interpreter_frame_monitor_end();
119 }
120 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
121 return _last_frame.next_monitor_in_interpreter_frame(current);
122 }
123
124 frame& get_frame() { return _last_frame; }
125 };
126
127 //------------------------------------------------------------------------------------------------------------------------
128 // State accessors
129
130 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
131 LastFrameAccessor last_frame(current);
132 last_frame.set_bcp(bcp);
133 if (ProfileInterpreter) {
134 // ProfileTraps uses MDOs independently of ProfileInterpreter.
135 // That is why we must check both ProfileInterpreter and mdo != nullptr.
136 MethodData* mdo = last_frame.method()->method_data();
137 if (mdo != nullptr) {
138 NEEDS_CLEANUP;
139 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
140 }
141 }
142 }
143
144 //------------------------------------------------------------------------------------------------------------------------
145 // Constants
146
147
148 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
149 // access constant pool
150 LastFrameAccessor last_frame(current);
151 ConstantPool* pool = last_frame.method()->constants();
152 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
153 constantTag tag = pool->tag_at(cp_index);
154
155 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
156 Klass* klass = pool->klass_at(cp_index, CHECK);
157 oop java_class = klass->java_mirror();
158 current->set_vm_result_oop(java_class);
159 JRT_END
160
161 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
162 assert(bytecode == Bytecodes::_ldc ||
163 bytecode == Bytecodes::_ldc_w ||
164 bytecode == Bytecodes::_ldc2_w ||
165 bytecode == Bytecodes::_fast_aldc ||
166 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
167 ResourceMark rm(current);
168 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
169 bytecode == Bytecodes::_fast_aldc_w);
170 LastFrameAccessor last_frame(current);
171 methodHandle m (current, last_frame.method());
172 Bytecode_loadconstant ldc(m, last_frame.bci());
173
174 // Double-check the size. (Condy can have any type.)
175 BasicType type = ldc.result_type();
176 switch (type2size[type]) {
177 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
178 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
179 default: ShouldNotReachHere();
180 }
181
182 // Resolve the constant. This does not do unboxing.
183 // But it does replace Universe::the_null_sentinel by null.
184 oop result = ldc.resolve_constant(CHECK);
185 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
186
187 #ifdef ASSERT
188 {
189 // The bytecode wrappers aren't GC-safe so construct a new one
190 Bytecode_loadconstant ldc2(m, last_frame.bci());
191 int rindex = ldc2.cache_index();
192 if (rindex < 0)
193 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
194 if (rindex >= 0) {
195 oop coop = m->constants()->resolved_reference_at(rindex);
196 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
197 assert(roop == coop, "expected result for assembly code");
198 }
199 }
200 #endif
201 current->set_vm_result_oop(result);
202 if (!is_fast_aldc) {
203 // Tell the interpreter how to unbox the primitive.
204 guarantee(java_lang_boxing_object::is_instance(result, type), "");
205 int offset = java_lang_boxing_object::value_offset(type);
206 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
207 | (offset & ConstantPoolCache::field_index_mask));
208 current->set_vm_result_metadata((Metadata*)flags);
209 }
210 }
211 JRT_END
212
213
214 //------------------------------------------------------------------------------------------------------------------------
215 // Allocation
216
217 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
218 Klass* k = pool->klass_at(index, CHECK);
219 InstanceKlass* klass = InstanceKlass::cast(k);
220
221 // Make sure we are not instantiating an abstract klass
222 klass->check_valid_for_instantiation(true, CHECK);
223
224 // Make sure klass is initialized
225 klass->initialize(CHECK);
226
227 oop obj = klass->allocate_instance(CHECK);
228 current->set_vm_result_oop(obj);
229 JRT_END
230
231 JRT_ENTRY(void, InterpreterRuntime::read_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
232 assert(oopDesc::is_oop(obj), "Sanity check");
233 Handle obj_h(THREAD, obj);
234
235 InstanceKlass* holder = InstanceKlass::cast(entry->field_holder());
236 assert(entry->field_holder()->field_is_flat(entry->field_index()), "Sanity check");
237
238 InlineLayoutInfo* layout_info = holder->inline_layout_info_adr(entry->field_index());
239 InlineKlass* field_vklass = layout_info->klass();
240
241 #ifdef ASSERT
242 fieldDescriptor fd;
243 bool found = holder->find_field_from_offset(entry->field_offset(), false, &fd);
244 assert(found, "Field not found");
245 assert(fd.is_flat(), "Field must be flat");
246 #endif // ASSERT
247
248 oop res = field_vklass->read_payload_from_addr(obj_h(), entry->field_offset(), layout_info->kind(), CHECK);
249 current->set_vm_result_oop(res);
250 JRT_END
251
252 JRT_ENTRY(void, InterpreterRuntime::read_nullable_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
253 assert(oopDesc::is_oop(obj), "Sanity check");
254 assert(entry->has_null_marker(), "Otherwise should not get there");
255 Handle obj_h(THREAD, obj);
256
257 InstanceKlass* holder = entry->field_holder();
258 int field_index = entry->field_index();
259 InlineLayoutInfo* li= holder->inline_layout_info_adr(field_index);
260
261 #ifdef ASSERT
262 fieldDescriptor fd;
263 bool found = holder->find_field_from_offset(entry->field_offset(), false, &fd);
264 assert(found, "Field not found");
265 assert(fd.is_flat(), "Field must be flat");
266 #endif // ASSERT
267
268 InlineKlass* field_vklass = InlineKlass::cast(li->klass());
269 oop res = field_vklass->read_payload_from_addr(obj_h(), entry->field_offset(), li->kind(), CHECK);
270 current->set_vm_result_oop(res);
271
272 JRT_END
273
274 JRT_ENTRY(void, InterpreterRuntime::write_nullable_flat_field(JavaThread* current, oopDesc* obj, oopDesc* value, ResolvedFieldEntry* entry))
275 assert(oopDesc::is_oop(obj), "Sanity check");
276 Handle obj_h(THREAD, obj);
277 assert(value == nullptr || oopDesc::is_oop(value), "Sanity check");
278 Handle val_h(THREAD, value);
279
280 InstanceKlass* holder = entry->field_holder();
281 InlineLayoutInfo* li = holder->inline_layout_info_adr(entry->field_index());
282 InlineKlass* vk = li->klass();
283 vk->write_value_to_addr(val_h(), ((char*)(oopDesc*)obj_h()) + entry->field_offset(), li->kind(), true, CHECK);
284 JRT_END
285
286 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
287 oop obj = oopFactory::new_typeArray(type, size, CHECK);
288 current->set_vm_result_oop(obj);
289 JRT_END
290
291
292 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
293 Klass* klass = pool->klass_at(index, CHECK);
294 arrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
295 current->set_vm_result_oop(obj);
296 JRT_END
297
298 JRT_ENTRY(void, InterpreterRuntime::flat_array_load(JavaThread* current, arrayOopDesc* array, int index))
299 assert(array->is_flatArray(), "Must be");
300 flatArrayOop farray = (flatArrayOop)array;
301 oop res = farray->read_value_from_flat_array(index, CHECK);
302 current->set_vm_result_oop(res);
303 JRT_END
304
305 JRT_ENTRY(void, InterpreterRuntime::flat_array_store(JavaThread* current, oopDesc* val, arrayOopDesc* array, int index))
306 assert(array->is_flatArray(), "Must be");
307 flatArrayOop farray = (flatArrayOop)array;
308 farray->write_value_to_flat_array(val, index, CHECK);
309 JRT_END
310
311 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
312 // We may want to pass in more arguments - could make this slightly faster
313 LastFrameAccessor last_frame(current);
314 ConstantPool* constants = last_frame.method()->constants();
315 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
316 Klass* klass = constants->klass_at(i, CHECK);
317 int nof_dims = last_frame.number_of_dimensions();
318 assert(klass->is_klass(), "not a class");
319 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
320
321 // We must create an array of jints to pass to multi_allocate.
322 ResourceMark rm(current);
323 const int small_dims = 10;
324 jint dim_array[small_dims];
325 jint *dims = &dim_array[0];
326 if (nof_dims > small_dims) {
327 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
328 }
329 for (int index = 0; index < nof_dims; index++) {
330 // offset from first_size_address is addressed as local[index]
331 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
332 dims[index] = first_size_address[n];
333 }
334 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
335 current->set_vm_result_oop(obj);
336 JRT_END
337
338
339 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
340 assert(oopDesc::is_oop(obj), "must be a valid oop");
341 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
342 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
343 JRT_END
344
345 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
346 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
347
348 Handle ha(THREAD, aobj);
349 Handle hb(THREAD, bobj);
350 JavaValue result(T_BOOLEAN);
351 JavaCallArguments args;
352 args.push_oop(ha);
353 args.push_oop(hb);
354 methodHandle method(current, Universe::is_substitutable_method());
355 method->method_holder()->initialize(CHECK_false); // Ensure class ValueObjectMethods is initialized
356 JavaCalls::call(&result, method, &args, THREAD);
357 if (HAS_PENDING_EXCEPTION) {
358 // Something really bad happened because isSubstitutable() should not throw exceptions
359 // If it is an error, just let it propagate
360 // If it is an exception, wrap it into an InternalError
361 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
362 Handle e(THREAD, PENDING_EXCEPTION);
363 CLEAR_PENDING_EXCEPTION;
364 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
365 }
366 }
367 return result.get_jboolean();
368 JRT_END
369
370 // Quicken instance-of and check-cast bytecodes
371 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
372 // Force resolving; quicken the bytecode
373 LastFrameAccessor last_frame(current);
374 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
375 ConstantPool* cpool = last_frame.method()->constants();
376 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
377 // program we might have seen an unquick'd bytecode in the interpreter but have another
378 // thread quicken the bytecode before we get here.
379 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
380 Klass* klass = cpool->klass_at(which, CHECK);
381 current->set_vm_result_metadata(klass);
382 JRT_END
383
384
385 //------------------------------------------------------------------------------------------------------------------------
386 // Exceptions
387
388 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
389 const methodHandle& trap_method, int trap_bci) {
390 if (trap_method.not_null()) {
391 MethodData* trap_mdo = trap_method->method_data();
392 if (trap_mdo == nullptr) {
393 ExceptionMark em(current);
394 JavaThread* THREAD = current; // For exception macros.
395 Method::build_profiling_method_data(trap_method, THREAD);
396 if (HAS_PENDING_EXCEPTION) {
397 // Only metaspace OOM is expected. No Java code executed.
398 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
399 "we expect only an OOM error here");
400 CLEAR_PENDING_EXCEPTION;
401 }
402 trap_mdo = trap_method->method_data();
403 // and fall through...
404 }
405 if (trap_mdo != nullptr) {
406 // Update per-method count of trap events. The interpreter
407 // is updating the MDO to simulate the effect of compiler traps.
408 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
409 }
410 }
411 }
412
413 // Assume the compiler is (or will be) interested in this event.
414 // If necessary, create an MDO to hold the information, and record it.
415 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
416 assert(ProfileTraps, "call me only if profiling");
417 LastFrameAccessor last_frame(current);
418 methodHandle trap_method(current, last_frame.method());
419 int trap_bci = trap_method->bci_from(last_frame.bcp());
420 note_trap_inner(current, reason, trap_method, trap_bci);
421 }
422
423 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
424 // get klass
425 InstanceKlass* klass = InstanceKlass::cast(k);
426 assert(klass->is_initialized(),
427 "this klass should have been initialized during VM initialization");
428 // create instance - do not call constructor since we may have no
429 // (java) stack space left (should assert constructor is empty)
430 Handle exception;
431 oop exception_oop = klass->allocate_instance(CHECK_(exception));
432 exception = Handle(THREAD, exception_oop);
433 if (StackTraceInThrowable) {
434 java_lang_Throwable::fill_in_stack_trace(exception);
435 }
436 return exception;
437 }
438
439 // Special handling for stack overflow: since we don't have any (java) stack
440 // space left we use the pre-allocated & pre-initialized StackOverflowError
441 // klass to create an stack overflow error instance. We do not call its
442 // constructor for the same reason (it is empty, anyway).
443 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
444 Handle exception = get_preinitialized_exception(
445 vmClasses::StackOverflowError_klass(),
446 CHECK);
447 // Increment counter for hs_err file reporting
448 Atomic::inc(&Exceptions::_stack_overflow_errors);
449 // Remove the ScopedValue bindings in case we got a StackOverflowError
450 // while we were trying to manipulate ScopedValue bindings.
451 current->clear_scopedValueBindings();
452 THROW_HANDLE(exception);
453 JRT_END
454
455 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
456 Handle exception = get_preinitialized_exception(
457 vmClasses::StackOverflowError_klass(),
458 CHECK);
459 java_lang_Throwable::set_message(exception(),
460 Universe::delayed_stack_overflow_error_message());
461 // Increment counter for hs_err file reporting
462 Atomic::inc(&Exceptions::_stack_overflow_errors);
463 // Remove the ScopedValue bindings in case we got a StackOverflowError
464 // while we were trying to manipulate ScopedValue bindings.
465 current->clear_scopedValueBindings();
466 THROW_HANDLE(exception);
467 JRT_END
468
469 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
470 // lookup exception klass
471 TempNewSymbol s = SymbolTable::new_symbol(name);
472 if (ProfileTraps) {
473 if (s == vmSymbols::java_lang_ArithmeticException()) {
474 note_trap(current, Deoptimization::Reason_div0_check);
475 } else if (s == vmSymbols::java_lang_NullPointerException()) {
476 note_trap(current, Deoptimization::Reason_null_check);
477 }
478 }
479 // create exception
480 Handle exception = Exceptions::new_exception(current, s, message);
481 current->set_vm_result_oop(exception());
482 JRT_END
483
484
485 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
486 // Produce the error message first because note_trap can safepoint
487 ResourceMark rm(current);
488 const char* klass_name = obj->klass()->external_name();
489 // lookup exception klass
490 TempNewSymbol s = SymbolTable::new_symbol(name);
491 if (ProfileTraps) {
492 if (s == vmSymbols::java_lang_ArrayStoreException()) {
493 note_trap(current, Deoptimization::Reason_array_check);
494 } else {
495 note_trap(current, Deoptimization::Reason_class_check);
496 }
497 }
498 // create exception, with klass name as detail message
499 Handle exception = Exceptions::new_exception(current, s, klass_name);
500 current->set_vm_result_oop(exception());
501 JRT_END
502
503 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
504 // Produce the error message first because note_trap can safepoint
505 ResourceMark rm(current);
506 stringStream ss;
507 ss.print("Index %d out of bounds for length %d", index, a->length());
508
509 if (ProfileTraps) {
510 note_trap(current, Deoptimization::Reason_range_check);
511 }
512
513 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
514 JRT_END
515
516 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
517 JavaThread* current, oopDesc* obj))
518
519 // Produce the error message first because note_trap can safepoint
520 ResourceMark rm(current);
521 char* message = SharedRuntime::generate_class_cast_message(
522 current, obj->klass());
523
524 if (ProfileTraps) {
525 note_trap(current, Deoptimization::Reason_class_check);
526 }
527
528 // create exception
529 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
530 JRT_END
531
532 // exception_handler_for_exception(...) returns the continuation address,
533 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
534 // The exception oop is returned to make sure it is preserved over GC (it
535 // is only on the stack if the exception was thrown explicitly via athrow).
536 // During this operation, the expression stack contains the values for the
537 // bci where the exception happened. If the exception was propagated back
538 // from a call, the expression stack contains the values for the bci at the
539 // invoke w/o arguments (i.e., as if one were inside the call).
540 // Note that the implementation of this method assumes it's only called when an exception has actually occured
541 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
542 // We get here after we have unwound from a callee throwing an exception
543 // into the interpreter. Any deferred stack processing is notified of
544 // the event via the StackWatermarkSet.
545 StackWatermarkSet::after_unwind(current);
546
547 LastFrameAccessor last_frame(current);
548 Handle h_exception(current, exception);
549 methodHandle h_method (current, last_frame.method());
550 constantPoolHandle h_constants(current, h_method->constants());
551 bool should_repeat;
552 int handler_bci;
553 int current_bci = last_frame.bci();
554
555 if (current->frames_to_pop_failed_realloc() > 0) {
556 // Allocation of scalar replaced object used in this frame
557 // failed. Unconditionally pop the frame.
558 current->dec_frames_to_pop_failed_realloc();
559 current->set_vm_result_oop(h_exception());
560 // If the method is synchronized we already unlocked the monitor
561 // during deoptimization so the interpreter needs to skip it when
562 // the frame is popped.
563 current->set_do_not_unlock_if_synchronized(true);
564 return Interpreter::remove_activation_entry();
565 }
566
567 // Need to do this check first since when _do_not_unlock_if_synchronized
568 // is set, we don't want to trigger any classloading which may make calls
569 // into java, or surprisingly find a matching exception handler for bci 0
570 // since at this moment the method hasn't been "officially" entered yet.
571 if (current->do_not_unlock_if_synchronized()) {
572 ResourceMark rm;
573 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
574 current->set_vm_result_oop(exception);
575 return Interpreter::remove_activation_entry();
576 }
577
578 do {
579 should_repeat = false;
580
581 // assertions
582 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
583 // Check that exception is a subclass of Throwable.
584 assert(h_exception->is_a(vmClasses::Throwable_klass()),
585 "Exception not subclass of Throwable");
586
587 // tracing
588 if (log_is_enabled(Info, exceptions)) {
589 ResourceMark rm(current);
590 stringStream tempst;
591 tempst.print("interpreter method <%s>\n"
592 " at bci %d for thread " INTPTR_FORMAT " (%s)",
593 h_method->print_value_string(), current_bci, p2i(current), current->name());
594 Exceptions::log_exception(h_exception, tempst.as_string());
595 }
596 // Don't go paging in something which won't be used.
597 // else if (extable->length() == 0) {
598 // // disabled for now - interpreter is not using shortcut yet
599 // // (shortcut is not to call runtime if we have no exception handlers)
600 // // warning("performance bug: should not call runtime if method has no exception handlers");
601 // }
602 // for AbortVMOnException flag
603 Exceptions::debug_check_abort(h_exception);
604
605 // exception handler lookup
606 Klass* klass = h_exception->klass();
607 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
608 if (HAS_PENDING_EXCEPTION) {
609 // We threw an exception while trying to find the exception handler.
610 // Transfer the new exception to the exception handle which will
611 // be set into thread local storage, and do another lookup for an
612 // exception handler for this exception, this time starting at the
613 // BCI of the exception handler which caused the exception to be
614 // thrown (bug 4307310).
615 h_exception = Handle(THREAD, PENDING_EXCEPTION);
616 CLEAR_PENDING_EXCEPTION;
617 if (handler_bci >= 0) {
618 current_bci = handler_bci;
619 should_repeat = true;
620 }
621 }
622 } while (should_repeat == true);
623
624 #if INCLUDE_JVMCI
625 if (EnableJVMCI && h_method->method_data() != nullptr) {
626 ResourceMark rm(current);
627 MethodData* mdo = h_method->method_data();
628
629 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
630 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
631
632 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
633 if (pdata != nullptr && pdata->is_BitData()) {
634 BitData* bit_data = (BitData*) pdata;
635 bit_data->set_exception_seen();
636 }
637 }
638 #endif
639
640 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
641 // time throw or a stack unwinding throw and accordingly notify the debugger
642 if (JvmtiExport::can_post_on_exceptions()) {
643 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
644 }
645
646 address continuation = nullptr;
647 address handler_pc = nullptr;
648 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
649 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
650 // handler in this method, or (b) after a stack overflow there is not yet
651 // enough stack space available to reprotect the stack.
652 continuation = Interpreter::remove_activation_entry();
653 #if COMPILER2_OR_JVMCI
654 // Count this for compilation purposes
655 h_method->interpreter_throwout_increment(THREAD);
656 #endif
657 } else {
658 // handler in this method => change bci/bcp to handler bci/bcp and continue there
659 handler_pc = h_method->code_base() + handler_bci;
660 h_method->set_exception_handler_entered(handler_bci); // profiling
661 #ifndef ZERO
662 set_bcp_and_mdp(handler_pc, current);
663 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
664 #else
665 continuation = (address)(intptr_t) handler_bci;
666 #endif
667 }
668
669 // notify debugger of an exception catch
670 // (this is good for exceptions caught in native methods as well)
671 if (JvmtiExport::can_post_on_exceptions()) {
672 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
673 }
674
675 current->set_vm_result_oop(h_exception());
676 return continuation;
677 JRT_END
678
679
680 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
681 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
682 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
683 JRT_END
684
685
686 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
687 THROW(vmSymbols::java_lang_AbstractMethodError());
688 JRT_END
689
690 // This method is called from the "abstract_entry" of the interpreter.
691 // At that point, the arguments have already been removed from the stack
692 // and therefore we don't have the receiver object at our fingertips. (Though,
693 // on some platforms the receiver still resides in a register...). Thus,
694 // we have no choice but print an error message not containing the receiver
695 // type.
696 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
697 Method* missingMethod))
698 ResourceMark rm(current);
699 assert(missingMethod != nullptr, "sanity");
700 methodHandle m(current, missingMethod);
701 LinkResolver::throw_abstract_method_error(m, THREAD);
702 JRT_END
703
704 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
705 Klass* recvKlass,
706 Method* missingMethod))
707 ResourceMark rm(current);
708 methodHandle mh = methodHandle(current, missingMethod);
709 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
710 JRT_END
711
712 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current))
713 THROW(vmSymbols::java_lang_InstantiationError());
714 JRT_END
715
716
717 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
718 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
719 JRT_END
720
721 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
722 Klass* recvKlass,
723 Klass* interfaceKlass))
724 ResourceMark rm(current);
725 char buf[1000];
726 buf[0] = '\0';
727 jio_snprintf(buf, sizeof(buf),
728 "Class %s does not implement the requested interface %s",
729 recvKlass ? recvKlass->external_name() : "nullptr",
730 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
731 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
732 JRT_END
733
734 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
735 THROW(vmSymbols::java_lang_NullPointerException());
736 JRT_END
737
738 //------------------------------------------------------------------------------------------------------------------------
739 // Fields
740 //
741
742 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
743 LastFrameAccessor last_frame(current);
744 constantPoolHandle pool(current, last_frame.method()->constants());
745 methodHandle m(current, last_frame.method());
746
747 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
748 }
749
750 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
751 methodHandle& m,
752 constantPoolHandle& pool,
753 bool initialize_holder, TRAPS) {
754 fieldDescriptor info;
755 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
756 bytecode == Bytecodes::_putstatic);
757 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
758
759 {
760 JvmtiHideSingleStepping jhss(THREAD);
761 LinkResolver::resolve_field_access(info, pool, field_index,
762 m, bytecode, initialize_holder, CHECK);
763 } // end JvmtiHideSingleStepping
764
765 // check if link resolution caused cpCache to be updated
766 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
767
768 // compute auxiliary field attributes
769 TosState state = as_TosState(info.field_type());
770
771 // Resolution of put instructions on final fields is delayed. That is required so that
772 // exceptions are thrown at the correct place (when the instruction is actually invoked).
773 // If we do not resolve an instruction in the current pass, leaving the put_code
774 // set to zero will cause the next put instruction to the same field to reresolve.
775
776 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
777 // to final instance fields with updates originating from a method different than <init>)
778 // is inhibited. A putfield instruction targeting an instance final field must throw
779 // an IllegalAccessError if the instruction is not in an instance
780 // initializer method <init>. If resolution were not inhibited, a putfield
781 // in an initializer method could be resolved in the initializer. Subsequent
782 // putfield instructions to the same field would then use cached information.
783 // As a result, those instructions would not pass through the VM. That is,
784 // checks in resolve_field_access() would not be executed for those instructions
785 // and the required IllegalAccessError would not be thrown.
786 //
787 // Also, we need to delay resolving getstatic and putstatic instructions until the
788 // class is initialized. This is required so that access to the static
789 // field will call the initialization function every time until the class
790 // is completely initialized ala. in 2.17.5 in JVM Specification.
791 InstanceKlass* klass = info.field_holder();
792 bool uninitialized_static = is_static && !klass->is_initialized();
793 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
794 info.has_initialized_final_update();
795 bool strict_static_final = info.is_strict() && info.is_static() && info.is_final();
796 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
797
798 Bytecodes::Code get_code = (Bytecodes::Code)0;
799 Bytecodes::Code put_code = (Bytecodes::Code)0;
800 if (!uninitialized_static) {
801 if (is_static) {
802 get_code = Bytecodes::_getstatic;
803 } else {
804 get_code = Bytecodes::_getfield;
805 }
806 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
807 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
808 }
809 assert(!info.is_strict_static_unset(), "after initialization, no unset flags");
810 } else if (is_static && (info.is_strict_static_unset() || strict_static_final)) {
811 // During <clinit>, closely track the state of strict statics.
812 // 1. if we are reading an uninitialized strict static, throw
813 // 2. if we are writing one, clear the "unset" flag
814 //
815 // Note: If we were handling an attempted write of a null to a
816 // null-restricted strict static, we would NOT clear the "unset"
817 // flag.
818 assert(klass->is_being_initialized(), "else should have thrown");
819 assert(klass->is_reentrant_initialization(THREAD),
820 "<clinit> must be running in current thread");
821 klass->notify_strict_static_access(info.index(), is_put, CHECK);
822 }
823
824 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
825 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile(),
826 info.is_flat(), info.is_null_free_inline_type(),
827 info.has_null_marker());
828
829 entry->fill_in(info.field_holder(), info.offset(),
830 checked_cast<u2>(info.index()), checked_cast<u1>(state),
831 static_cast<u1>(get_code), static_cast<u1>(put_code));
832 }
833
834
835 //------------------------------------------------------------------------------------------------------------------------
836 // Synchronization
837 //
838 // The interpreter's synchronization code is factored out so that it can
839 // be shared by method invocation and synchronized blocks.
840 //%note synchronization_3
841
842 //%note monitor_1
843 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
844 #ifdef ASSERT
845 current->last_frame().interpreter_frame_verify_monitor(elem);
846 #endif
847 Handle h_obj(current, elem->obj());
848 assert(Universe::heap()->is_in_or_null(h_obj()),
849 "must be null or an object");
850 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
851 assert(Universe::heap()->is_in_or_null(elem->obj()),
852 "must be null or an object");
853 #ifdef ASSERT
854 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
855 #endif
856 JRT_END
857
858 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
859 oop obj = elem->obj();
860 assert(Universe::heap()->is_in(obj), "must be an object");
861 // The object could become unlocked through a JNI call, which we have no other checks for.
862 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
863 if (obj->is_unlocked()) {
864 if (CheckJNICalls) {
865 fatal("Object has been unlocked by JNI");
866 }
867 return;
868 }
869 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
870 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
871 // again at method exit or in the case of an exception.
872 elem->set_obj(nullptr);
873 JRT_END
874
875 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
876 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
877 JRT_END
878
879 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
880 // Returns an illegal exception to install into the current thread. The
881 // pending_exception flag is cleared so normal exception handling does not
882 // trigger. Any current installed exception will be overwritten. This
883 // method will be called during an exception unwind.
884
885 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
886 Handle exception(current, current->vm_result_oop());
887 assert(exception() != nullptr, "vm result should be set");
888 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
889 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
890 current->set_vm_result_oop(exception());
891 JRT_END
892
893 JRT_ENTRY(void, InterpreterRuntime::throw_identity_exception(JavaThread* current, oopDesc* obj))
894 Klass* klass = cast_to_oop(obj)->klass();
895 ResourceMark rm(THREAD);
896 const char* desc = "Cannot synchronize on an instance of value class ";
897 const char* className = klass->external_name();
898 size_t msglen = strlen(desc) + strlen(className) + 1;
899 char* message = NEW_RESOURCE_ARRAY(char, msglen);
900 if (nullptr == message) {
901 // Out of memory: can't create detailed error message
902 THROW_MSG(vmSymbols::java_lang_IdentityException(), className);
903 } else {
904 jio_snprintf(message, msglen, "%s%s", desc, className);
905 THROW_MSG(vmSymbols::java_lang_IdentityException(), message);
906 }
907 JRT_END
908
909 //------------------------------------------------------------------------------------------------------------------------
910 // Invokes
911
912 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
913 return method->orig_bytecode_at(method->bci_from(bcp));
914 JRT_END
915
916 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
917 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
918 JRT_END
919
920 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
921 JvmtiExport::post_raw_breakpoint(current, method, bcp);
922 JRT_END
923
924 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
925 LastFrameAccessor last_frame(current);
926 // extract receiver from the outgoing argument list if necessary
927 Handle receiver(current, nullptr);
928 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
929 bytecode == Bytecodes::_invokespecial) {
930 ResourceMark rm(current);
931 methodHandle m (current, last_frame.method());
932 Bytecode_invoke call(m, last_frame.bci());
933 Symbol* signature = call.signature();
934 receiver = Handle(current, last_frame.callee_receiver(signature));
935
936 assert(Universe::heap()->is_in_or_null(receiver()),
937 "sanity check");
938 assert(receiver.is_null() ||
939 !Universe::heap()->is_in(receiver->klass()),
940 "sanity check");
941 }
942
943 // resolve method
944 CallInfo info;
945 constantPoolHandle pool(current, last_frame.method()->constants());
946
947 methodHandle resolved_method;
948
949 int method_index = last_frame.get_index_u2(bytecode);
950 {
951 JvmtiHideSingleStepping jhss(current);
952 JavaThread* THREAD = current; // For exception macros.
953 LinkResolver::resolve_invoke(info, receiver, pool,
954 method_index, bytecode,
955 THREAD);
956
957 if (HAS_PENDING_EXCEPTION) {
958 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
959 // Preserve the original exception across the call to note_trap()
960 PreserveExceptionMark pm(current);
961 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
962 note_trap(current, Deoptimization::Reason_null_check);
963 }
964 return;
965 }
966
967 resolved_method = methodHandle(current, info.resolved_method());
968 } // end JvmtiHideSingleStepping
969
970 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
971 }
972
973 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
974 methodHandle& resolved_method,
975 constantPoolHandle& pool,
976 int method_index) {
977 // Don't allow safepoints until the method is cached.
978 NoSafepointVerifier nsv;
979
980 // check if link resolution caused cpCache to be updated
981 ConstantPoolCache* cache = pool->cache();
982 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
983
984 #ifdef ASSERT
985 if (bytecode == Bytecodes::_invokeinterface) {
986 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
987 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
988 // (see also CallInfo::set_interface for details)
989 assert(info.call_kind() == CallInfo::vtable_call ||
990 info.call_kind() == CallInfo::direct_call, "");
991 assert(resolved_method->is_final() || info.has_vtable_index(),
992 "should have been set already");
993 } else if (!resolved_method->has_itable_index()) {
994 // Resolved something like CharSequence.toString. Use vtable not itable.
995 assert(info.call_kind() != CallInfo::itable_call, "");
996 } else {
997 // Setup itable entry
998 assert(info.call_kind() == CallInfo::itable_call, "");
999 int index = resolved_method->itable_index();
1000 assert(info.itable_index() == index, "");
1001 }
1002 } else if (bytecode == Bytecodes::_invokespecial) {
1003 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1004 } else {
1005 assert(info.call_kind() == CallInfo::direct_call ||
1006 info.call_kind() == CallInfo::vtable_call, "");
1007 }
1008 #endif
1009 // Get sender and only set cpCache entry to resolved if it is not an
1010 // interface. The receiver for invokespecial calls within interface
1011 // methods must be checked for every call.
1012 InstanceKlass* sender = pool->pool_holder();
1013
1014 switch (info.call_kind()) {
1015 case CallInfo::direct_call:
1016 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
1017 break;
1018 case CallInfo::vtable_call:
1019 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
1020 break;
1021 case CallInfo::itable_call:
1022 cache->set_itable_call(
1023 bytecode,
1024 method_index,
1025 info.resolved_klass(),
1026 resolved_method,
1027 info.itable_index());
1028 break;
1029 default: ShouldNotReachHere();
1030 }
1031 }
1032
1033 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
1034 constantPoolHandle& pool, TRAPS) {
1035 LinkInfo link_info(pool, method_index, bytecode, CHECK);
1036
1037 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1038 CallInfo call_info;
1039 switch (bytecode) {
1040 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
1041 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1042 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1043
1044 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1045 }
1046 methodHandle resolved_method(THREAD, call_info.resolved_method());
1047 guarantee(resolved_method->method_holder()->is_linked(), "");
1048 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1049 } else {
1050 // FIXME: why a shared class is not linked yet?
1051 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1052 ResourceMark rm;
1053 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1054 log_info(cds, resolve)("Not resolved: class not linked: %s %s %s",
1055 resolved_iklass->is_shared() ? "is_shared" : "",
1056 resolved_iklass->init_state_name(),
1057 resolved_iklass->external_name());
1058 }
1059 }
1060
1061 // First time execution: Resolve symbols, create a permanent MethodType object.
1062 void InterpreterRuntime::resolve_invokehandle(JavaThread* current) {
1063 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1064 LastFrameAccessor last_frame(current);
1065
1066 // resolve method
1067 CallInfo info;
1068 constantPoolHandle pool(current, last_frame.method()->constants());
1069 int method_index = last_frame.get_index_u2(bytecode);
1070 {
1071 JvmtiHideSingleStepping jhss(current);
1072 JavaThread* THREAD = current; // For exception macros.
1073 LinkResolver::resolve_invoke(info, Handle(), pool,
1074 method_index, bytecode,
1075 CHECK);
1076 } // end JvmtiHideSingleStepping
1077
1078 pool->cache()->set_method_handle(method_index, info);
1079 }
1080
1081 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1082 constantPoolHandle& pool, TRAPS) {
1083 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1084 CallInfo info;
1085 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1086
1087 pool->cache()->set_method_handle(raw_index, info);
1088 }
1089
1090 // First time execution: Resolve symbols, create a permanent CallSite object.
1091 void InterpreterRuntime::resolve_invokedynamic(JavaThread* current) {
1092 LastFrameAccessor last_frame(current);
1093 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1094
1095 // resolve method
1096 CallInfo info;
1097 constantPoolHandle pool(current, last_frame.method()->constants());
1098 int index = last_frame.get_index_u4(bytecode);
1099 {
1100 JvmtiHideSingleStepping jhss(current);
1101 JavaThread* THREAD = current; // For exception macros.
1102 LinkResolver::resolve_invoke(info, Handle(), pool,
1103 index, bytecode, CHECK);
1104 } // end JvmtiHideSingleStepping
1105
1106 pool->cache()->set_dynamic_call(info, index);
1107 }
1108
1109 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1110 constantPoolHandle& pool, TRAPS) {
1111 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1112 CallInfo info;
1113 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1114 pool->cache()->set_dynamic_call(info, raw_index);
1115 }
1116
1117 // This function is the interface to the assembly code. It returns the resolved
1118 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1119 // This function will check for redefinition!
1120 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1121 switch (bytecode) {
1122 case Bytecodes::_getstatic:
1123 case Bytecodes::_putstatic:
1124 case Bytecodes::_getfield:
1125 case Bytecodes::_putfield:
1126 resolve_get_put(current, bytecode);
1127 break;
1128 case Bytecodes::_invokevirtual:
1129 case Bytecodes::_invokespecial:
1130 case Bytecodes::_invokestatic:
1131 case Bytecodes::_invokeinterface:
1132 resolve_invoke(current, bytecode);
1133 break;
1134 case Bytecodes::_invokehandle:
1135 resolve_invokehandle(current);
1136 break;
1137 case Bytecodes::_invokedynamic:
1138 resolve_invokedynamic(current);
1139 break;
1140 default:
1141 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1142 break;
1143 }
1144 }
1145 JRT_END
1146
1147 //------------------------------------------------------------------------------------------------------------------------
1148 // Miscellaneous
1149
1150
1151 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1152 // Enable WXWrite: the function is called directly by interpreter.
1153 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1154
1155 // frequency_counter_overflow_inner can throw async exception.
1156 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1157 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1158 if (branch_bcp != nullptr && nm != nullptr) {
1159 // This was a successful request for an OSR nmethod. Because
1160 // frequency_counter_overflow_inner ends with a safepoint check,
1161 // nm could have been unloaded so look it up again. It's unsafe
1162 // to examine nm directly since it might have been freed and used
1163 // for something else.
1164 LastFrameAccessor last_frame(current);
1165 Method* method = last_frame.method();
1166 int bci = method->bci_from(last_frame.bcp());
1167 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1168 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1169 if (nm != nullptr) {
1170 // in case the transition passed a safepoint we need to barrier this again
1171 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1172 nm = nullptr;
1173 }
1174 }
1175 }
1176 if (nm != nullptr && current->is_interp_only_mode()) {
1177 // Normally we never get an nm if is_interp_only_mode() is true, because
1178 // policy()->event has a check for this and won't compile the method when
1179 // true. However, it's possible for is_interp_only_mode() to become true
1180 // during the compilation. We don't want to return the nm in that case
1181 // because we want to continue to execute interpreted.
1182 nm = nullptr;
1183 }
1184 #ifndef PRODUCT
1185 if (TraceOnStackReplacement) {
1186 if (nm != nullptr) {
1187 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1188 nm->print();
1189 }
1190 }
1191 #endif
1192 return nm;
1193 }
1194
1195 JRT_ENTRY(nmethod*,
1196 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1197 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1198 // flag, in case this method triggers classloading which will call into Java.
1199 UnlockFlagSaver fs(current);
1200
1201 LastFrameAccessor last_frame(current);
1202 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1203 methodHandle method(current, last_frame.method());
1204 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1205 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1206
1207 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1208
1209 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1210 if (osr_nm != nullptr) {
1211 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1212 osr_nm = nullptr;
1213 }
1214 }
1215 return osr_nm;
1216 JRT_END
1217
1218 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1219 assert(ProfileInterpreter, "must be profiling interpreter");
1220 int bci = method->bci_from(cur_bcp);
1221 MethodData* mdo = method->method_data();
1222 if (mdo == nullptr) return 0;
1223 return mdo->bci_to_di(bci);
1224 JRT_END
1225
1226 #ifdef ASSERT
1227 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1228 assert(ProfileInterpreter, "must be profiling interpreter");
1229
1230 MethodData* mdo = method->method_data();
1231 assert(mdo != nullptr, "must not be null");
1232
1233 int bci = method->bci_from(bcp);
1234
1235 address mdp2 = mdo->bci_to_dp(bci);
1236 if (mdp != mdp2) {
1237 ResourceMark rm;
1238 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1239 int current_di = mdo->dp_to_di(mdp);
1240 int expected_di = mdo->dp_to_di(mdp2);
1241 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1242 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1243 int approx_bci = -1;
1244 if (current_di >= 0) {
1245 approx_bci = mdo->data_at(current_di)->bci();
1246 }
1247 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1248 mdo->print_on(tty);
1249 method->print_codes();
1250 }
1251 assert(mdp == mdp2, "wrong mdp");
1252 JRT_END
1253 #endif // ASSERT
1254
1255 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1256 assert(ProfileInterpreter, "must be profiling interpreter");
1257 ResourceMark rm(current);
1258 LastFrameAccessor last_frame(current);
1259 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1260 MethodData* h_mdo = last_frame.method()->method_data();
1261
1262 // Grab a lock to ensure atomic access to setting the return bci and
1263 // the displacement. This can block and GC, invalidating all naked oops.
1264 MutexLocker ml(RetData_lock);
1265
1266 // ProfileData is essentially a wrapper around a derived oop, so we
1267 // need to take the lock before making any ProfileData structures.
1268 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1269 guarantee(data != nullptr, "profile data must be valid");
1270 RetData* rdata = data->as_RetData();
1271 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1272 last_frame.set_mdp(new_mdp);
1273 JRT_END
1274
1275 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1276 return Method::build_method_counters(current, m);
1277 JRT_END
1278
1279
1280 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1281 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1282 // stack traversal automatically takes care of preserving arguments for invoke, so
1283 // this is no longer needed.
1284
1285 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1286 // if this is called during a safepoint
1287
1288 if (JvmtiExport::should_post_single_step()) {
1289 // This function is called by the interpreter when single stepping. Such single
1290 // stepping could unwind a frame. Then, it is important that we process any frames
1291 // that we might return into.
1292 StackWatermarkSet::before_unwind(current);
1293
1294 // We are called during regular safepoints and when the VM is
1295 // single stepping. If any thread is marked for single stepping,
1296 // then we may have JVMTI work to do.
1297 LastFrameAccessor last_frame(current);
1298 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1299 }
1300 JRT_END
1301
1302 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1303 assert(current == JavaThread::current(), "pre-condition");
1304 // This function is called by the interpreter when the return poll found a reason
1305 // to call the VM. The reason could be that we are returning into a not yet safe
1306 // to access frame. We handle that below.
1307 // Note that this path does not check for single stepping, because we do not want
1308 // to single step when unwinding frames for an exception being thrown. Instead,
1309 // such single stepping code will use the safepoint table, which will use the
1310 // InterpreterRuntime::at_safepoint callback.
1311 StackWatermarkSet::before_unwind(current);
1312 JRT_END
1313
1314 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1315 ResolvedFieldEntry *entry))
1316
1317 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1318 // check the access_flags for the field in the klass
1319
1320 InstanceKlass* ik = entry->field_holder();
1321 int index = entry->field_index();
1322 if (!ik->field_status(index).is_access_watched()) return;
1323
1324 bool is_static = (obj == nullptr);
1325 bool is_flat = entry->is_flat();
1326 HandleMark hm(current);
1327
1328 Handle h_obj;
1329 if (!is_static) {
1330 // non-static field accessors have an object, but we need a handle
1331 h_obj = Handle(current, obj);
1332 }
1333 InstanceKlass* field_holder = entry->field_holder(); // HERE
1334 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static, is_flat);
1335 LastFrameAccessor last_frame(current);
1336 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1337 JRT_END
1338
1339 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1340 ResolvedFieldEntry *entry, jvalue *value))
1341
1342 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1343 InstanceKlass* ik = entry->field_holder();
1344
1345 // check the access_flags for the field in the klass
1346 int index = entry->field_index();
1347 // bail out if field modifications are not watched
1348 if (!ik->field_status(index).is_modification_watched()) return;
1349
1350 char sig_type = '\0';
1351
1352 switch((TosState)entry->tos_state()) {
1353 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1354 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1355 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1356 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1357 case itos: sig_type = JVM_SIGNATURE_INT; break;
1358 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1359 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1360 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1361 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1362 default: ShouldNotReachHere(); return;
1363 }
1364
1365 bool is_static = (obj == nullptr);
1366 bool is_flat = entry->is_flat();
1367
1368 HandleMark hm(current);
1369 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static, is_flat);
1370 jvalue fvalue;
1371 #ifdef _LP64
1372 fvalue = *value;
1373 #else
1374 // Long/double values are stored unaligned and also noncontiguously with
1375 // tagged stacks. We can't just do a simple assignment even in the non-
1376 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1377 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1378 // We assume that the two halves of longs/doubles are stored in interpreter
1379 // stack slots in platform-endian order.
1380 jlong_accessor u;
1381 jint* newval = (jint*)value;
1382 u.words[0] = newval[0];
1383 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1384 fvalue.j = u.long_value;
1385 #endif // _LP64
1386
1387 Handle h_obj;
1388 if (!is_static) {
1389 // non-static field accessors have an object, but we need a handle
1390 h_obj = Handle(current, obj);
1391 }
1392
1393 LastFrameAccessor last_frame(current);
1394 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1395 fid, sig_type, &fvalue);
1396 JRT_END
1397
1398 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1399 LastFrameAccessor last_frame(current);
1400 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1401 JRT_END
1402
1403
1404 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1405 // before transitioning to VM, and restore it after transitioning back
1406 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1407 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1408 LastFrameAccessor last_frame(current);
1409 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1410 JRT_END
1411
1412 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1413 {
1414 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1415 }
1416 JRT_END
1417
1418
1419 // Implementation of SignatureHandlerLibrary
1420
1421 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1422 // Dummy definition (else normalization method is defined in CPU
1423 // dependent code)
1424 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1425 return fingerprint;
1426 }
1427 #endif
1428
1429 address SignatureHandlerLibrary::set_handler_blob() {
1430 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1431 if (handler_blob == nullptr) {
1432 return nullptr;
1433 }
1434 address handler = handler_blob->code_begin();
1435 _handler_blob = handler_blob;
1436 _handler = handler;
1437 return handler;
1438 }
1439
1440 void SignatureHandlerLibrary::initialize() {
1441 if (_fingerprints != nullptr) {
1442 return;
1443 }
1444 if (set_handler_blob() == nullptr) {
1445 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1446 }
1447
1448 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1449 SignatureHandlerLibrary::buffer_size);
1450 _buffer = bb->code_begin();
1451
1452 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1453 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1454 }
1455
1456 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1457 address handler = _handler;
1458 int insts_size = buffer->pure_insts_size();
1459 if (handler + insts_size > _handler_blob->code_end()) {
1460 // get a new handler blob
1461 handler = set_handler_blob();
1462 }
1463 if (handler != nullptr) {
1464 memcpy(handler, buffer->insts_begin(), insts_size);
1465 pd_set_handler(handler);
1466 ICache::invalidate_range(handler, insts_size);
1467 _handler = handler + insts_size;
1468 }
1469 return handler;
1470 }
1471
1472 void SignatureHandlerLibrary::add(const methodHandle& method) {
1473 if (method->signature_handler() == nullptr) {
1474 // use slow signature handler if we can't do better
1475 int handler_index = -1;
1476 // check if we can use customized (fast) signature handler
1477 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1478 // use customized signature handler
1479 MutexLocker mu(SignatureHandlerLibrary_lock);
1480 // make sure data structure is initialized
1481 initialize();
1482 // lookup method signature's fingerprint
1483 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1484 // allow CPU dependent code to optimize the fingerprints for the fast handler
1485 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1486 handler_index = _fingerprints->find(fingerprint);
1487 // create handler if necessary
1488 if (handler_index < 0) {
1489 ResourceMark rm;
1490 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1491 CodeBuffer buffer((address)(_buffer + align_offset),
1492 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1493 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1494 // copy into code heap
1495 address handler = set_handler(&buffer);
1496 if (handler == nullptr) {
1497 // use slow signature handler (without memorizing it in the fingerprints)
1498 } else {
1499 // debugging support
1500 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1501 ttyLocker ttyl;
1502 tty->cr();
1503 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1504 _handlers->length(),
1505 (method->is_static() ? "static" : "receiver"),
1506 method->name_and_sig_as_C_string(),
1507 fingerprint,
1508 buffer.insts_size());
1509 if (buffer.insts_size() > 0) {
1510 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1511 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1512 }
1513 #ifndef PRODUCT
1514 address rh_begin = Interpreter::result_handler(method()->result_type());
1515 if (CodeCache::contains(rh_begin)) {
1516 // else it might be special platform dependent values
1517 tty->print_cr(" --- associated result handler ---");
1518 address rh_end = rh_begin;
1519 while (*(int*)rh_end != 0) {
1520 rh_end += sizeof(int);
1521 }
1522 Disassembler::decode(rh_begin, rh_end);
1523 } else {
1524 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1525 }
1526 #endif
1527 }
1528 // add handler to library
1529 _fingerprints->append(fingerprint);
1530 _handlers->append(handler);
1531 // set handler index
1532 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1533 handler_index = _fingerprints->length() - 1;
1534 }
1535 }
1536 // Set handler under SignatureHandlerLibrary_lock
1537 if (handler_index < 0) {
1538 // use generic signature handler
1539 method->set_signature_handler(Interpreter::slow_signature_handler());
1540 } else {
1541 // set handler
1542 method->set_signature_handler(_handlers->at(handler_index));
1543 }
1544 } else {
1545 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1546 // use generic signature handler
1547 method->set_signature_handler(Interpreter::slow_signature_handler());
1548 }
1549 }
1550 #ifdef ASSERT
1551 int handler_index = -1;
1552 int fingerprint_index = -2;
1553 {
1554 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1555 // in any way if accessed from multiple threads. To avoid races with another
1556 // thread which may change the arrays in the above, mutex protected block, we
1557 // have to protect this read access here with the same mutex as well!
1558 MutexLocker mu(SignatureHandlerLibrary_lock);
1559 if (_handlers != nullptr) {
1560 handler_index = _handlers->find(method->signature_handler());
1561 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1562 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1563 fingerprint_index = _fingerprints->find(fingerprint);
1564 }
1565 }
1566 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1567 handler_index == fingerprint_index, "sanity check");
1568 #endif // ASSERT
1569 }
1570
1571 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1572 address SignatureHandlerLibrary::_handler = nullptr;
1573 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1574 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1575 address SignatureHandlerLibrary::_buffer = nullptr;
1576
1577
1578 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1579 methodHandle m(current, method);
1580 assert(m->is_native(), "sanity check");
1581 // lookup native function entry point if it doesn't exist
1582 if (!m->has_native_function()) {
1583 NativeLookup::lookup(m, CHECK);
1584 }
1585 // make sure signature handler is installed
1586 SignatureHandlerLibrary::add(m);
1587 // The interpreter entry point checks the signature handler first,
1588 // before trying to fetch the native entry point and klass mirror.
1589 // We must set the signature handler last, so that multiple processors
1590 // preparing the same method will be sure to see non-null entry & mirror.
1591 JRT_END
1592
1593 #if defined(IA32) || defined(AMD64) || defined(ARM)
1594 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1595 assert(current == JavaThread::current(), "pre-condition");
1596 if (src_address == dest_address) {
1597 return;
1598 }
1599 ResourceMark rm;
1600 LastFrameAccessor last_frame(current);
1601 assert(last_frame.is_interpreted_frame(), "");
1602 jint bci = last_frame.bci();
1603 methodHandle mh(current, last_frame.method());
1604 Bytecode_invoke invoke(mh, bci);
1605 ArgumentSizeComputer asc(invoke.signature());
1606 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1607 Copy::conjoint_jbytes(src_address, dest_address,
1608 size_of_arguments * Interpreter::stackElementSize);
1609 JRT_END
1610 #endif
1611
1612 #if INCLUDE_JVMTI
1613 // This is a support of the JVMTI PopFrame interface.
1614 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1615 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters.
1616 // The member_name argument is a saved reference (in local#0) to the member_name.
1617 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1618 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1619 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1620 Method* method, address bcp))
1621 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1622 if (code != Bytecodes::_invokestatic) {
1623 return;
1624 }
1625 ConstantPool* cpool = method->constants();
1626 int cp_index = Bytes::get_native_u2(bcp + 1);
1627 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1628 Symbol* mname = cpool->name_ref_at(cp_index, code);
1629
1630 if (MethodHandles::has_member_arg(cname, mname)) {
1631 oop member_name_oop = cast_to_oop(member_name);
1632 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1633 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1634 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1635 }
1636 current->set_vm_result_oop(member_name_oop);
1637 } else {
1638 current->set_vm_result_oop(nullptr);
1639 }
1640 JRT_END
1641 #endif // INCLUDE_JVMTI
1642
1643 #ifndef PRODUCT
1644 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1645 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1646 // The generated code still uses call_VM because that will set up the frame pointer for
1647 // bcp and method.
1648 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1649 assert(current == JavaThread::current(), "pre-condition");
1650 LastFrameAccessor last_frame(current);
1651 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1652 methodHandle mh(current, last_frame.method());
1653 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1654 return preserve_this_value;
1655 JRT_END
1656 #endif // !PRODUCT