1 /*
2 * Copyright (c) 1997, 2026, 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/method.inline.hpp"
54 #include "oops/methodData.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/oopsHierarchy.hpp"
59 #include "oops/symbol.hpp"
60 #include "oops/valuePayload.inline.hpp"
61 #include "prims/jvmtiExport.hpp"
62 #include "prims/methodHandles.hpp"
63 #include "prims/nativeLookup.hpp"
64 #include "runtime/continuation.hpp"
65 #include "runtime/deoptimization.hpp"
66 #include "runtime/fieldDescriptor.inline.hpp"
67 #include "runtime/frame.inline.hpp"
68 #include "runtime/handles.inline.hpp"
69 #include "runtime/icache.hpp"
70 #include "runtime/interfaceSupport.inline.hpp"
71 #include "runtime/java.hpp"
72 #include "runtime/javaCalls.hpp"
73 #include "runtime/jfieldIDWorkaround.hpp"
74 #include "runtime/osThread.hpp"
75 #include "runtime/sharedRuntime.hpp"
76 #include "runtime/stackWatermarkSet.hpp"
77 #include "runtime/stubRoutines.hpp"
78 #include "runtime/synchronizer.hpp"
79 #include "utilities/align.hpp"
80 #include "utilities/checkedCast.hpp"
81 #include "utilities/copy.hpp"
82 #include "utilities/events.hpp"
83 #include "utilities/exceptions.hpp"
84 #include "utilities/globalDefinitions.hpp"
85 #if INCLUDE_JFR
86 #include "jfr/jfr.inline.hpp"
87 #endif
88
89 // Helper class to access current interpreter state
90 class LastFrameAccessor : public StackObj {
91 frame _last_frame;
92 public:
93 LastFrameAccessor(JavaThread* current) {
94 assert(current == Thread::current(), "sanity");
95 _last_frame = current->last_frame();
96 }
97 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
98 Method* method() const { return _last_frame.interpreter_frame_method(); }
99 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
100 int bci() const { return _last_frame.interpreter_frame_bci(); }
101 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
102
103 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
104 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
105
106 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
107 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
108
109 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
110 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
111 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
112 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
113 int number_of_dimensions() const { return bcp()[3]; }
114
115 oop callee_receiver(Symbol* signature) {
116 return _last_frame.interpreter_callee_receiver(signature);
117 }
118 BasicObjectLock* monitor_begin() const {
119 return _last_frame.interpreter_frame_monitor_begin();
120 }
121 BasicObjectLock* monitor_end() const {
122 return _last_frame.interpreter_frame_monitor_end();
123 }
124 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
125 return _last_frame.next_monitor_in_interpreter_frame(current);
126 }
127
128 frame& get_frame() { return _last_frame; }
129 };
130
131 //------------------------------------------------------------------------------------------------------------------------
132 // State accessors
133
134 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
135 LastFrameAccessor last_frame(current);
136 last_frame.set_bcp(bcp);
137 if (ProfileInterpreter) {
138 // ProfileTraps uses MDOs independently of ProfileInterpreter.
139 // That is why we must check both ProfileInterpreter and mdo != nullptr.
140 MethodData* mdo = last_frame.method()->method_data();
141 if (mdo != nullptr) {
142 NEEDS_CLEANUP;
143 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
144 }
145 }
146 }
147
148 //------------------------------------------------------------------------------------------------------------------------
149 // Constants
150
151
152 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
153 // access constant pool
154 LastFrameAccessor last_frame(current);
155 ConstantPool* pool = last_frame.method()->constants();
156 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
157 constantTag tag = pool->tag_at(cp_index);
158
159 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
160 Klass* klass = pool->klass_at(cp_index, CHECK);
161 oop java_class = klass->java_mirror();
162 current->set_vm_result_oop(java_class);
163 JRT_END
164
165 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
166 assert(bytecode == Bytecodes::_ldc ||
167 bytecode == Bytecodes::_ldc_w ||
168 bytecode == Bytecodes::_ldc2_w ||
169 bytecode == Bytecodes::_fast_aldc ||
170 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
171 ResourceMark rm(current);
172 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
173 bytecode == Bytecodes::_fast_aldc_w);
174 LastFrameAccessor last_frame(current);
175 methodHandle m (current, last_frame.method());
176 Bytecode_loadconstant ldc(m, last_frame.bci());
177
178 // Double-check the size. (Condy can have any type.)
179 BasicType type = ldc.result_type();
180 switch (type2size[type]) {
181 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
182 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
183 default: ShouldNotReachHere();
184 }
185
186 // Resolve the constant. This does not do unboxing.
187 // But it does replace Universe::the_null_sentinel by null.
188 oop result = ldc.resolve_constant(CHECK);
189 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
190
191 #ifdef ASSERT
192 {
193 // The bytecode wrappers aren't GC-safe so construct a new one
194 Bytecode_loadconstant ldc2(m, last_frame.bci());
195 int rindex = ldc2.cache_index();
196 if (rindex < 0)
197 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
198 if (rindex >= 0) {
199 oop coop = m->constants()->resolved_reference_at(rindex);
200 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
201 assert(roop == coop, "expected result for assembly code");
202 }
203 }
204 #endif
205 current->set_vm_result_oop(result);
206 if (!is_fast_aldc) {
207 // Tell the interpreter how to unbox the primitive.
208 guarantee(java_lang_boxing_object::is_instance(result, type), "");
209 int offset = java_lang_boxing_object::value_offset(type);
210 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
211 | (offset & ConstantPoolCache::field_index_mask));
212 current->set_vm_result_metadata((Metadata*)flags);
213 }
214 }
215 JRT_END
216
217
218 //------------------------------------------------------------------------------------------------------------------------
219 // Allocation
220
221 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
222 Klass* k = pool->klass_at(index, CHECK);
223 InstanceKlass* klass = InstanceKlass::cast(k);
224
225 // Make sure we are not instantiating an abstract klass
226 klass->check_valid_for_instantiation(true, CHECK);
227
228 // Make sure klass is initialized
229 klass->initialize_preemptable(CHECK_AND_CLEAR_PREEMPTED);
230
231 oop obj = klass->allocate_instance(CHECK);
232 current->set_vm_result_oop(obj);
233 JRT_END
234
235 JRT_BLOCK_ENTRY(void, InterpreterRuntime::read_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
236 assert(oopDesc::is_oop(obj), "Sanity check");
237
238 FlatFieldPayload payload(instanceOop(obj), entry);
239 if (payload.is_payload_null()) {
240 // If the payload is null return before entring the JRT_BLOCK.
241 current->set_vm_result_oop(nullptr);
242 return;
243 }
244 JRT_BLOCK
245 oop res = payload.read(CHECK);
246 current->set_vm_result_oop(res);
247 JRT_BLOCK_END
248 JRT_END
249
250 JRT_ENTRY(void, InterpreterRuntime::write_flat_field(JavaThread* current, oopDesc* obj, oopDesc* value, ResolvedFieldEntry* entry))
251 assert(oopDesc::is_oop(obj), "Sanity check");
252 assert(oopDesc::is_oop_or_null(value), "Sanity check");
253
254 FlatFieldPayload payload(instanceOop(obj), entry);
255 payload.write(inlineOop(value), CHECK);
256 JRT_END
257
258 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
259 oop obj = oopFactory::new_typeArray(type, size, CHECK);
260 current->set_vm_result_oop(obj);
261 JRT_END
262
263
264 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
265 Klass* klass = pool->klass_at(index, CHECK);
266 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
267 current->set_vm_result_oop(obj);
268 JRT_END
269
270 JRT_ENTRY(void, InterpreterRuntime::flat_array_load(JavaThread* current, arrayOopDesc* array, int index))
271 assert(array->is_flatArray(), "Must be");
272 flatArrayOop farray = (flatArrayOop)array;
273 oop res = farray->obj_at(index, CHECK);
274 current->set_vm_result_oop(res);
275 JRT_END
276
277 JRT_ENTRY(void, InterpreterRuntime::flat_array_store(JavaThread* current, oopDesc* val, arrayOopDesc* array, int index))
278 assert(array->is_flatArray(), "Must be");
279 flatArrayOop farray = (flatArrayOop)array;
280 farray->obj_at_put(index, val, CHECK);
281 JRT_END
282
283 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
284 // We may want to pass in more arguments - could make this slightly faster
285 LastFrameAccessor last_frame(current);
286 ConstantPool* constants = last_frame.method()->constants();
287 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
288 Klass* klass = constants->klass_at(i, CHECK);
289 int nof_dims = last_frame.number_of_dimensions();
290 assert(klass->is_klass(), "not a class");
291 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
292
293 // We must create an array of jints to pass to multi_allocate.
294 ResourceMark rm(current);
295 const int small_dims = 10;
296 jint dim_array[small_dims];
297 jint *dims = &dim_array[0];
298 if (nof_dims > small_dims) {
299 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
300 }
301 for (int index = 0; index < nof_dims; index++) {
302 // offset from first_size_address is addressed as local[index]
303 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
304 dims[index] = first_size_address[n];
305 }
306 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
307 current->set_vm_result_oop(obj);
308 JRT_END
309
310
311 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
312 assert(oopDesc::is_oop(obj), "must be a valid oop");
313 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
314 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
315 JRT_END
316
317 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
318 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
319
320 Handle ha(THREAD, aobj);
321 Handle hb(THREAD, bobj);
322 JavaValue result(T_BOOLEAN);
323 JavaCallArguments args;
324 args.push_oop(ha);
325 args.push_oop(hb);
326 methodHandle method(current, Universe::is_substitutable_method());
327 method->method_holder()->initialize(CHECK_false); // Ensure class ValueObjectMethods is initialized
328 JavaCalls::call(&result, method, &args, THREAD);
329 if (HAS_PENDING_EXCEPTION) {
330 // Something really bad happened because isSubstitutable() should not throw exceptions
331 // If it is an error, just let it propagate
332 // If it is an exception, wrap it into an InternalError
333 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
334 Handle e(THREAD, PENDING_EXCEPTION);
335 CLEAR_PENDING_EXCEPTION;
336 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
337 }
338 }
339 return result.get_jboolean();
340 JRT_END
341
342 // Quicken instance-of and check-cast bytecodes
343 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
344 // Force resolving; quicken the bytecode
345 LastFrameAccessor last_frame(current);
346 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
347 ConstantPool* cpool = last_frame.method()->constants();
348 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
349 // program we might have seen an unquick'd bytecode in the interpreter but have another
350 // thread quicken the bytecode before we get here.
351 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
352 Klass* klass = cpool->klass_at(which, CHECK);
353 current->set_vm_result_metadata(klass);
354 JRT_END
355
356
357 //------------------------------------------------------------------------------------------------------------------------
358 // Exceptions
359
360 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
361 const methodHandle& trap_method, int trap_bci) {
362 if (trap_method.not_null()) {
363 MethodData* trap_mdo = trap_method->method_data();
364 if (trap_mdo == nullptr) {
365 ExceptionMark em(current);
366 JavaThread* THREAD = current; // For exception macros.
367 Method::build_profiling_method_data(trap_method, THREAD);
368 if (HAS_PENDING_EXCEPTION) {
369 // Only metaspace OOM is expected. No Java code executed.
370 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
371 "we expect only an OOM error here");
372 CLEAR_PENDING_EXCEPTION;
373 }
374 trap_mdo = trap_method->method_data();
375 // and fall through...
376 }
377 if (trap_mdo != nullptr) {
378 // Update per-method count of trap events. The interpreter
379 // is updating the MDO to simulate the effect of compiler traps.
380 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
381 }
382 }
383 }
384
385 // Assume the compiler is (or will be) interested in this event.
386 // If necessary, create an MDO to hold the information, and record it.
387 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
388 assert(ProfileTraps, "call me only if profiling");
389 LastFrameAccessor last_frame(current);
390 methodHandle trap_method(current, last_frame.method());
391 int trap_bci = trap_method->bci_from(last_frame.bcp());
392 note_trap_inner(current, reason, trap_method, trap_bci);
393 }
394
395 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
396 // get klass
397 InstanceKlass* klass = InstanceKlass::cast(k);
398 assert(klass->is_initialized(),
399 "this klass should have been initialized during VM initialization");
400 // create instance - do not call constructor since we may have no
401 // (java) stack space left (should assert constructor is empty)
402 Handle exception;
403 oop exception_oop = klass->allocate_instance(CHECK_(exception));
404 exception = Handle(THREAD, exception_oop);
405 if (StackTraceInThrowable) {
406 java_lang_Throwable::fill_in_stack_trace(exception);
407 }
408 return exception;
409 }
410
411 // Special handling for stack overflow: since we don't have any (java) stack
412 // space left we use the pre-allocated & pre-initialized StackOverflowError
413 // klass to create an stack overflow error instance. We do not call its
414 // constructor for the same reason (it is empty, anyway).
415 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
416 Handle exception = get_preinitialized_exception(
417 vmClasses::StackOverflowError_klass(),
418 CHECK);
419 // Increment counter for hs_err file reporting
420 Exceptions::increment_stack_overflow_errors();
421 // Remove the ScopedValue bindings in case we got a StackOverflowError
422 // while we were trying to manipulate ScopedValue bindings.
423 current->clear_scopedValueBindings();
424 THROW_HANDLE(exception);
425 JRT_END
426
427 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
428 Handle exception = get_preinitialized_exception(
429 vmClasses::StackOverflowError_klass(),
430 CHECK);
431 java_lang_Throwable::set_message(exception(),
432 Universe::delayed_stack_overflow_error_message());
433 // Increment counter for hs_err file reporting
434 Exceptions::increment_stack_overflow_errors();
435 // Remove the ScopedValue bindings in case we got a StackOverflowError
436 // while we were trying to manipulate ScopedValue bindings.
437 current->clear_scopedValueBindings();
438 THROW_HANDLE(exception);
439 JRT_END
440
441 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
442 // lookup exception klass
443 TempNewSymbol s = SymbolTable::new_symbol(name);
444 if (ProfileTraps) {
445 if (s == vmSymbols::java_lang_ArithmeticException()) {
446 note_trap(current, Deoptimization::Reason_div0_check);
447 } else if (s == vmSymbols::java_lang_NullPointerException()) {
448 note_trap(current, Deoptimization::Reason_null_check);
449 }
450 }
451 // create exception
452 Handle exception = Exceptions::new_exception(current, s, message);
453 current->set_vm_result_oop(exception());
454 JRT_END
455
456
457 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
458 // Produce the error message first because note_trap can safepoint
459 ResourceMark rm(current);
460 const char* klass_name = obj->klass()->external_name();
461 // lookup exception klass
462 TempNewSymbol s = SymbolTable::new_symbol(name);
463 if (ProfileTraps) {
464 if (s == vmSymbols::java_lang_ArrayStoreException()) {
465 note_trap(current, Deoptimization::Reason_array_check);
466 } else {
467 note_trap(current, Deoptimization::Reason_class_check);
468 }
469 }
470 // create exception, with klass name as detail message
471 Handle exception = Exceptions::new_exception(current, s, klass_name);
472 current->set_vm_result_oop(exception());
473 JRT_END
474
475 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
476 // Produce the error message first because note_trap can safepoint
477 ResourceMark rm(current);
478 stringStream ss;
479 ss.print("Index %d out of bounds for length %d", index, a->length());
480
481 if (ProfileTraps) {
482 note_trap(current, Deoptimization::Reason_range_check);
483 }
484
485 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
486 JRT_END
487
488 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
489 JavaThread* current, oopDesc* obj))
490
491 // Produce the error message first because note_trap can safepoint
492 ResourceMark rm(current);
493 char* message = SharedRuntime::generate_class_cast_message(
494 current, obj->klass());
495
496 if (ProfileTraps) {
497 note_trap(current, Deoptimization::Reason_class_check);
498 }
499
500 // create exception
501 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
502 JRT_END
503
504 // exception_handler_for_exception(...) returns the continuation address,
505 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
506 // The exception oop is returned to make sure it is preserved over GC (it
507 // is only on the stack if the exception was thrown explicitly via athrow).
508 // During this operation, the expression stack contains the values for the
509 // bci where the exception happened. If the exception was propagated back
510 // from a call, the expression stack contains the values for the bci at the
511 // invoke w/o arguments (i.e., as if one were inside the call).
512 // Note that the implementation of this method assumes it's only called when an exception has actually occured
513 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
514 // We get here after we have unwound from a callee throwing an exception
515 // into the interpreter. Any deferred stack processing is notified of
516 // the event via the StackWatermarkSet.
517 StackWatermarkSet::after_unwind(current);
518
519 LastFrameAccessor last_frame(current);
520 Handle h_exception(current, exception);
521 methodHandle h_method (current, last_frame.method());
522 constantPoolHandle h_constants(current, h_method->constants());
523 bool should_repeat;
524 int handler_bci;
525 int current_bci = last_frame.bci();
526
527 if (current->frames_to_pop_failed_realloc() > 0) {
528 // Allocation of scalar replaced object used in this frame
529 // failed. Unconditionally pop the frame.
530 current->dec_frames_to_pop_failed_realloc();
531 current->set_vm_result_oop(h_exception());
532 // If the method is synchronized we already unlocked the monitor
533 // during deoptimization so the interpreter needs to skip it when
534 // the frame is popped.
535 current->set_do_not_unlock_if_synchronized(true);
536 return Interpreter::remove_activation_entry();
537 }
538
539 // Need to do this check first since when _do_not_unlock_if_synchronized
540 // is set, we don't want to trigger any classloading which may make calls
541 // into java, or surprisingly find a matching exception handler for bci 0
542 // since at this moment the method hasn't been "officially" entered yet.
543 if (current->do_not_unlock_if_synchronized()) {
544 ResourceMark rm;
545 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
546 current->set_vm_result_oop(exception);
547 return Interpreter::remove_activation_entry();
548 }
549
550 do {
551 should_repeat = false;
552
553 // assertions
554 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
555 // Check that exception is a subclass of Throwable.
556 assert(h_exception->is_a(vmClasses::Throwable_klass()),
557 "Exception not subclass of Throwable");
558
559 // tracing
560 if (log_is_enabled(Info, exceptions)) {
561 ResourceMark rm(current);
562 stringStream tempst;
563 tempst.print("interpreter method <%s>\n"
564 " at bci %d for thread " INTPTR_FORMAT " (%s)",
565 h_method->print_value_string(), current_bci, p2i(current), current->name());
566 Exceptions::log_exception(h_exception, tempst.as_string());
567 }
568 if (log_is_enabled(Info, exceptions, stacktrace)) {
569 Exceptions::log_exception_stacktrace(h_exception, h_method, current_bci);
570 }
571
572 // Don't go paging in something which won't be used.
573 // else if (extable->length() == 0) {
574 // // disabled for now - interpreter is not using shortcut yet
575 // // (shortcut is not to call runtime if we have no exception handlers)
576 // // warning("performance bug: should not call runtime if method has no exception handlers");
577 // }
578 // for AbortVMOnException flag
579 Exceptions::debug_check_abort(h_exception);
580
581 // exception handler lookup
582 Klass* klass = h_exception->klass();
583 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
584 if (HAS_PENDING_EXCEPTION) {
585 // We threw an exception while trying to find the exception handler.
586 // Transfer the new exception to the exception handle which will
587 // be set into thread local storage, and do another lookup for an
588 // exception handler for this exception, this time starting at the
589 // BCI of the exception handler which caused the exception to be
590 // thrown (bug 4307310).
591 h_exception = Handle(THREAD, PENDING_EXCEPTION);
592 CLEAR_PENDING_EXCEPTION;
593 if (handler_bci >= 0) {
594 current_bci = handler_bci;
595 should_repeat = true;
596 }
597 }
598 } while (should_repeat == true);
599
600 #if INCLUDE_JVMCI
601 if (EnableJVMCI && h_method->method_data() != nullptr) {
602 ResourceMark rm(current);
603 MethodData* mdo = h_method->method_data();
604
605 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
606 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
607
608 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
609 if (pdata != nullptr && pdata->is_BitData()) {
610 BitData* bit_data = (BitData*) pdata;
611 bit_data->set_exception_seen();
612 }
613 }
614 #endif
615
616 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
617 // time throw or a stack unwinding throw and accordingly notify the debugger
618 if (JvmtiExport::can_post_on_exceptions()) {
619 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
620 }
621
622 address continuation = nullptr;
623 address handler_pc = nullptr;
624 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
625 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
626 // handler in this method, or (b) after a stack overflow there is not yet
627 // enough stack space available to reprotect the stack.
628 continuation = Interpreter::remove_activation_entry();
629 #if COMPILER2_OR_JVMCI
630 // Count this for compilation purposes
631 h_method->interpreter_throwout_increment(THREAD);
632 #endif
633 } else {
634 // handler in this method => change bci/bcp to handler bci/bcp and continue there
635 handler_pc = h_method->code_base() + handler_bci;
636 h_method->set_exception_handler_entered(handler_bci); // profiling
637 #ifndef ZERO
638 set_bcp_and_mdp(handler_pc, current);
639 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
640 #else
641 continuation = (address)(intptr_t) handler_bci;
642 #endif
643 }
644
645 // notify debugger of an exception catch
646 // (this is good for exceptions caught in native methods as well)
647 if (JvmtiExport::can_post_on_exceptions()) {
648 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
649 }
650
651 current->set_vm_result_oop(h_exception());
652 return continuation;
653 JRT_END
654
655
656 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
657 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
658 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
659 JRT_END
660
661
662 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
663 THROW(vmSymbols::java_lang_AbstractMethodError());
664 JRT_END
665
666 // This method is called from the "abstract_entry" of the interpreter.
667 // At that point, the arguments have already been removed from the stack
668 // and therefore we don't have the receiver object at our fingertips. (Though,
669 // on some platforms the receiver still resides in a register...). Thus,
670 // we have no choice but print an error message not containing the receiver
671 // type.
672 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
673 Method* missingMethod))
674 ResourceMark rm(current);
675 assert(missingMethod != nullptr, "sanity");
676 methodHandle m(current, missingMethod);
677 LinkResolver::throw_abstract_method_error(m, THREAD);
678 JRT_END
679
680 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
681 Klass* recvKlass,
682 Method* missingMethod))
683 ResourceMark rm(current);
684 methodHandle mh = methodHandle(current, missingMethod);
685 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
686 JRT_END
687
688 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
689 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
690 JRT_END
691
692 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
693 Klass* recvKlass,
694 Klass* interfaceKlass))
695 ResourceMark rm(current);
696 char buf[1000];
697 buf[0] = '\0';
698 jio_snprintf(buf, sizeof(buf),
699 "Class %s does not implement the requested interface %s",
700 recvKlass ? recvKlass->external_name() : "nullptr",
701 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
702 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
703 JRT_END
704
705 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
706 THROW(vmSymbols::java_lang_NullPointerException());
707 JRT_END
708
709 //------------------------------------------------------------------------------------------------------------------------
710 // Fields
711 //
712
713 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, TRAPS) {
714 JavaThread* current = THREAD;
715 LastFrameAccessor last_frame(current);
716 constantPoolHandle pool(current, last_frame.method()->constants());
717 methodHandle m(current, last_frame.method());
718
719 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, ClassInitMode::init_preemptable, THREAD);
720 }
721
722 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
723 methodHandle& m,
724 constantPoolHandle& pool,
725 ClassInitMode init_mode, TRAPS) {
726 fieldDescriptor info;
727 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
728 bytecode == Bytecodes::_putstatic);
729 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
730
731 {
732 JvmtiHideSingleStepping jhss(THREAD);
733 LinkResolver::resolve_field_access(info, pool, field_index, m, bytecode, init_mode, CHECK);
734 } // end JvmtiHideSingleStepping
735
736 // check if link resolution caused cpCache to be updated
737 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
738
739 // compute auxiliary field attributes
740 TosState state = as_TosState(info.field_type());
741
742 // Resolution of put instructions on final fields is delayed. That is required so that
743 // exceptions are thrown at the correct place (when the instruction is actually invoked).
744 // If we do not resolve an instruction in the current pass, leaving the put_code
745 // set to zero will cause the next put instruction to the same field to reresolve.
746
747 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
748 // to final instance fields with updates originating from a method different than <init>)
749 // is inhibited. A putfield instruction targeting an instance final field must throw
750 // an IllegalAccessError if the instruction is not in an instance
751 // initializer method <init>. If resolution were not inhibited, a putfield
752 // in an initializer method could be resolved in the initializer. Subsequent
753 // putfield instructions to the same field would then use cached information.
754 // As a result, those instructions would not pass through the VM. That is,
755 // checks in resolve_field_access() would not be executed for those instructions
756 // and the required IllegalAccessError would not be thrown.
757 //
758 // Also, we need to delay resolving getstatic and putstatic instructions until the
759 // class is initialized. This is required so that access to the static
760 // field will call the initialization function every time until the class
761 // is completely initialized ala. in 2.17.5 in JVM Specification.
762 InstanceKlass* klass = info.field_holder();
763 bool uninitialized_static = is_static && !klass->is_initialized();
764 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
765 info.has_initialized_final_update();
766 bool strict_static_final = info.is_strict() && info.is_static() && info.is_final();
767 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
768
769 Bytecodes::Code get_code = (Bytecodes::Code)0;
770 Bytecodes::Code put_code = (Bytecodes::Code)0;
771 if (uninitialized_static && (info.is_strict_static_unset() || strict_static_final)) {
772 // During <clinit>, closely track the state of strict statics.
773 // 1. if we are reading an uninitialized strict static, throw
774 // 2. if we are writing one, clear the "unset" flag
775 //
776 // Note: If we were handling an attempted write of a null to a
777 // null-restricted strict static, we would NOT clear the "unset"
778 // flag.
779 assert(klass->is_being_initialized(), "else should have thrown");
780 assert(klass->is_reentrant_initialization(THREAD),
781 "<clinit> must be running in current thread");
782 klass->notify_strict_static_access(info.index(), is_put, CHECK);
783 assert(!info.is_strict_static_unset(), "after initialization, no unset flags");
784 } else if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) {
785 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
786 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
787 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
788 }
789 }
790
791 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
792 entry->fill_in(info, checked_cast<u1>(state),
793 static_cast<u1>(get_code), static_cast<u1>(put_code));
794 }
795
796
797 //------------------------------------------------------------------------------------------------------------------------
798 // Synchronization
799 //
800 // The interpreter's synchronization code is factored out so that it can
801 // be shared by method invocation and synchronized blocks.
802 //%note synchronization_3
803
804 //%note monitor_1
805 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
806 #ifdef ASSERT
807 current->last_frame().interpreter_frame_verify_monitor(elem);
808 #endif
809 Handle h_obj(current, elem->obj());
810 assert(Universe::heap()->is_in_or_null(h_obj()),
811 "must be null or an object");
812 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
813 assert(Universe::heap()->is_in_or_null(elem->obj()),
814 "must be null or an object");
815 #ifdef ASSERT
816 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
817 #endif
818 JRT_END
819
820 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
821 oop obj = elem->obj();
822 assert(Universe::heap()->is_in(obj), "must be an object");
823 // The object could become unlocked through a JNI call, which we have no other checks for.
824 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
825 if (obj->is_unlocked()) {
826 if (CheckJNICalls) {
827 fatal("Object has been unlocked by JNI");
828 }
829 return;
830 }
831 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
832 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
833 // again at method exit or in the case of an exception.
834 elem->set_obj(nullptr);
835 JRT_END
836
837 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
838 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
839 JRT_END
840
841 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
842 // Returns an illegal exception to install into the current thread. The
843 // pending_exception flag is cleared so normal exception handling does not
844 // trigger. Any current installed exception will be overwritten. This
845 // method will be called during an exception unwind.
846
847 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
848 Handle exception(current, current->vm_result_oop());
849 assert(exception() != nullptr, "vm result should be set");
850 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
851 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
852 current->set_vm_result_oop(exception());
853 JRT_END
854
855 JRT_ENTRY(void, InterpreterRuntime::throw_identity_exception(JavaThread* current, oopDesc* obj))
856 Klass* klass = cast_to_oop(obj)->klass();
857 ResourceMark rm(THREAD);
858 const char* desc = "Cannot synchronize on an instance of value class ";
859 const char* className = klass->external_name();
860 size_t msglen = strlen(desc) + strlen(className) + 1;
861 char* message = NEW_RESOURCE_ARRAY(char, msglen);
862 if (nullptr == message) {
863 // Out of memory: can't create detailed error message
864 THROW_MSG(vmSymbols::java_lang_IdentityException(), className);
865 } else {
866 jio_snprintf(message, msglen, "%s%s", desc, className);
867 THROW_MSG(vmSymbols::java_lang_IdentityException(), message);
868 }
869 JRT_END
870
871 //------------------------------------------------------------------------------------------------------------------------
872 // Invokes
873
874 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
875 return method->orig_bytecode_at(method->bci_from(bcp));
876 JRT_END
877
878 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
879 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
880 JRT_END
881
882 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
883 JvmtiExport::post_raw_breakpoint(current, method, bcp);
884 JRT_END
885
886 void InterpreterRuntime::resolve_invoke(Bytecodes::Code bytecode, TRAPS) {
887 JavaThread* current = THREAD;
888 LastFrameAccessor last_frame(current);
889 // extract receiver from the outgoing argument list if necessary
890 Handle receiver(current, nullptr);
891 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
892 bytecode == Bytecodes::_invokespecial) {
893 ResourceMark rm(current);
894 methodHandle m (current, last_frame.method());
895 Bytecode_invoke call(m, last_frame.bci());
896 Symbol* signature = call.signature();
897 receiver = Handle(current, last_frame.callee_receiver(signature));
898
899 assert(Universe::heap()->is_in_or_null(receiver()),
900 "sanity check");
901 assert(receiver.is_null() ||
902 !Universe::heap()->is_in(receiver->klass()),
903 "sanity check");
904 }
905
906 // resolve method
907 CallInfo info;
908 constantPoolHandle pool(current, last_frame.method()->constants());
909
910 methodHandle resolved_method;
911
912 int method_index = last_frame.get_index_u2(bytecode);
913 {
914 JvmtiHideSingleStepping jhss(current);
915 LinkResolver::resolve_invoke(info, receiver, pool,
916 method_index, bytecode,
917 ClassInitMode::init_preemptable, THREAD);
918
919 if (HAS_PENDING_EXCEPTION) {
920 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
921 // Preserve the original exception across the call to note_trap()
922 PreserveExceptionMark pm(current);
923 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
924 note_trap(current, Deoptimization::Reason_null_check);
925 }
926 return;
927 }
928
929 resolved_method = methodHandle(current, info.resolved_method());
930 } // end JvmtiHideSingleStepping
931
932 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
933 }
934
935 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
936 methodHandle& resolved_method,
937 constantPoolHandle& pool,
938 int method_index) {
939 // Don't allow safepoints until the method is cached.
940 NoSafepointVerifier nsv;
941
942 // check if link resolution caused cpCache to be updated
943 ConstantPoolCache* cache = pool->cache();
944 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
945
946 #ifdef ASSERT
947 if (bytecode == Bytecodes::_invokeinterface) {
948 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
949 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
950 // (see also CallInfo::set_interface for details)
951 assert(info.call_kind() == CallInfo::vtable_call ||
952 info.call_kind() == CallInfo::direct_call, "");
953 assert(resolved_method->is_final() || info.has_vtable_index(),
954 "should have been set already");
955 } else if (!resolved_method->has_itable_index()) {
956 // Resolved something like CharSequence.toString. Use vtable not itable.
957 assert(info.call_kind() != CallInfo::itable_call, "");
958 } else {
959 // Setup itable entry
960 assert(info.call_kind() == CallInfo::itable_call, "");
961 int index = resolved_method->itable_index();
962 assert(info.itable_index() == index, "");
963 }
964 } else if (bytecode == Bytecodes::_invokespecial) {
965 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
966 } else {
967 assert(info.call_kind() == CallInfo::direct_call ||
968 info.call_kind() == CallInfo::vtable_call, "");
969 }
970 #endif
971 // Get sender and only set cpCache entry to resolved if it is not an
972 // interface. The receiver for invokespecial calls within interface
973 // methods must be checked for every call.
974 InstanceKlass* sender = pool->pool_holder();
975
976 switch (info.call_kind()) {
977 case CallInfo::direct_call:
978 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
979 break;
980 case CallInfo::vtable_call:
981 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
982 break;
983 case CallInfo::itable_call:
984 cache->set_itable_call(
985 bytecode,
986 method_index,
987 info.resolved_klass(),
988 resolved_method,
989 info.itable_index());
990 break;
991 default: ShouldNotReachHere();
992 }
993 }
994
995 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
996 constantPoolHandle& pool, TRAPS) {
997 LinkInfo link_info(pool, method_index, bytecode, CHECK);
998
999 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1000 CallInfo call_info;
1001 switch (bytecode) {
1002 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
1003 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1004 case Bytecodes::_invokestatic: LinkResolver::cds_resolve_static_call (call_info, link_info, CHECK); break;
1005 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1006
1007 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1008 }
1009 methodHandle resolved_method(THREAD, call_info.resolved_method());
1010 guarantee(resolved_method->method_holder()->is_linked(), "");
1011 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1012 } else {
1013 // FIXME: why a shared class is not linked yet?
1014 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1015 ResourceMark rm;
1016 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1017 log_info(aot, resolve)("Not resolved: class not linked: %s %s %s",
1018 resolved_iklass->in_aot_cache() ? "in_aot_cache" : "",
1019 resolved_iklass->init_state_name(),
1020 resolved_iklass->external_name());
1021 }
1022 }
1023
1024 // First time execution: Resolve symbols, create a permanent MethodType object.
1025 void InterpreterRuntime::resolve_invokehandle(TRAPS) {
1026 JavaThread* current = THREAD;
1027 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1028 LastFrameAccessor last_frame(current);
1029
1030 // resolve method
1031 CallInfo info;
1032 constantPoolHandle pool(current, last_frame.method()->constants());
1033 int method_index = last_frame.get_index_u2(bytecode);
1034 {
1035 JvmtiHideSingleStepping jhss(current);
1036 JavaThread* THREAD = current; // For exception macros.
1037 LinkResolver::resolve_invoke(info, Handle(), pool,
1038 method_index, bytecode,
1039 CHECK);
1040 } // end JvmtiHideSingleStepping
1041
1042 pool->cache()->set_method_handle(method_index, info);
1043 }
1044
1045 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1046 constantPoolHandle& pool, TRAPS) {
1047 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1048 CallInfo info;
1049 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1050
1051 pool->cache()->set_method_handle(raw_index, info);
1052 }
1053
1054 // First time execution: Resolve symbols, create a permanent CallSite object.
1055 void InterpreterRuntime::resolve_invokedynamic(TRAPS) {
1056 JavaThread* current = THREAD;
1057 LastFrameAccessor last_frame(current);
1058 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1059
1060 // resolve method
1061 CallInfo info;
1062 constantPoolHandle pool(current, last_frame.method()->constants());
1063 int index = last_frame.get_index_u4(bytecode);
1064 {
1065 JvmtiHideSingleStepping jhss(current);
1066 JavaThread* THREAD = current; // For exception macros.
1067 LinkResolver::resolve_invoke(info, Handle(), pool,
1068 index, bytecode, CHECK);
1069 } // end JvmtiHideSingleStepping
1070
1071 pool->cache()->set_dynamic_call(info, index);
1072 }
1073
1074 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1075 constantPoolHandle& pool, TRAPS) {
1076 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1077 CallInfo info;
1078 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1079 pool->cache()->set_dynamic_call(info, raw_index);
1080 }
1081
1082 // This function is the interface to the assembly code. It returns the resolved
1083 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1084 // This function will check for redefinition!
1085 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1086 switch (bytecode) {
1087 case Bytecodes::_getstatic:
1088 case Bytecodes::_putstatic:
1089 case Bytecodes::_getfield:
1090 case Bytecodes::_putfield:
1091 resolve_get_put(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1092 break;
1093 case Bytecodes::_invokevirtual:
1094 case Bytecodes::_invokespecial:
1095 case Bytecodes::_invokestatic:
1096 case Bytecodes::_invokeinterface:
1097 resolve_invoke(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1098 break;
1099 case Bytecodes::_invokehandle:
1100 resolve_invokehandle(THREAD);
1101 break;
1102 case Bytecodes::_invokedynamic:
1103 resolve_invokedynamic(THREAD);
1104 break;
1105 default:
1106 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1107 break;
1108 }
1109 }
1110 JRT_END
1111
1112 //------------------------------------------------------------------------------------------------------------------------
1113 // Miscellaneous
1114
1115
1116 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1117 // Enable WXWrite: the function is called directly by interpreter.
1118 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1119
1120 // frequency_counter_overflow_inner can throw async exception.
1121 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1122 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1123 if (branch_bcp != nullptr && nm != nullptr) {
1124 // This was a successful request for an OSR nmethod. Because
1125 // frequency_counter_overflow_inner ends with a safepoint check,
1126 // nm could have been unloaded so look it up again. It's unsafe
1127 // to examine nm directly since it might have been freed and used
1128 // for something else.
1129 LastFrameAccessor last_frame(current);
1130 Method* method = last_frame.method();
1131 int bci = method->bci_from(last_frame.bcp());
1132 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1133 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1134 if (nm != nullptr) {
1135 // in case the transition passed a safepoint we need to barrier this again
1136 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1137 nm = nullptr;
1138 }
1139 }
1140 }
1141 if (nm != nullptr && current->is_interp_only_mode()) {
1142 // Normally we never get an nm if is_interp_only_mode() is true, because
1143 // policy()->event has a check for this and won't compile the method when
1144 // true. However, it's possible for is_interp_only_mode() to become true
1145 // during the compilation. We don't want to return the nm in that case
1146 // because we want to continue to execute interpreted.
1147 nm = nullptr;
1148 }
1149 #ifndef PRODUCT
1150 if (TraceOnStackReplacement) {
1151 if (nm != nullptr) {
1152 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1153 nm->print();
1154 }
1155 }
1156 #endif
1157 return nm;
1158 }
1159
1160 JRT_ENTRY(nmethod*,
1161 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1162 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1163 // flag, in case this method triggers classloading which will call into Java.
1164 UnlockFlagSaver fs(current);
1165
1166 LastFrameAccessor last_frame(current);
1167 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1168 methodHandle method(current, last_frame.method());
1169 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1170 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1171
1172 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1173
1174 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1175 if (osr_nm != nullptr) {
1176 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1177 osr_nm = nullptr;
1178 }
1179 }
1180 return osr_nm;
1181 JRT_END
1182
1183 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1184 assert(ProfileInterpreter, "must be profiling interpreter");
1185 int bci = method->bci_from(cur_bcp);
1186 MethodData* mdo = method->method_data();
1187 if (mdo == nullptr) return 0;
1188 return mdo->bci_to_di(bci);
1189 JRT_END
1190
1191 #ifdef ASSERT
1192 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1193 assert(ProfileInterpreter, "must be profiling interpreter");
1194
1195 MethodData* mdo = method->method_data();
1196 assert(mdo != nullptr, "must not be null");
1197
1198 int bci = method->bci_from(bcp);
1199
1200 address mdp2 = mdo->bci_to_dp(bci);
1201 if (mdp != mdp2) {
1202 ResourceMark rm;
1203 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1204 int current_di = mdo->dp_to_di(mdp);
1205 int expected_di = mdo->dp_to_di(mdp2);
1206 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1207 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1208 int approx_bci = -1;
1209 if (current_di >= 0) {
1210 approx_bci = mdo->data_at(current_di)->bci();
1211 }
1212 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1213 mdo->print_on(tty);
1214 method->print_codes();
1215 }
1216 assert(mdp == mdp2, "wrong mdp");
1217 JRT_END
1218 #endif // ASSERT
1219
1220 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1221 assert(ProfileInterpreter, "must be profiling interpreter");
1222 ResourceMark rm(current);
1223 LastFrameAccessor last_frame(current);
1224 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1225 MethodData* h_mdo = last_frame.method()->method_data();
1226
1227 // Grab a lock to ensure atomic access to setting the return bci and
1228 // the displacement. This can block and GC, invalidating all naked oops.
1229 MutexLocker ml(RetData_lock);
1230
1231 // ProfileData is essentially a wrapper around a derived oop, so we
1232 // need to take the lock before making any ProfileData structures.
1233 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1234 guarantee(data != nullptr, "profile data must be valid");
1235 RetData* rdata = data->as_RetData();
1236 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1237 last_frame.set_mdp(new_mdp);
1238 JRT_END
1239
1240 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1241 return Method::build_method_counters(current, m);
1242 JRT_END
1243
1244
1245 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1246 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1247 // stack traversal automatically takes care of preserving arguments for invoke, so
1248 // this is no longer needed.
1249
1250 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1251 // if this is called during a safepoint
1252
1253 if (JvmtiExport::should_post_single_step()) {
1254 // This function is called by the interpreter when single stepping. Such single
1255 // stepping could unwind a frame. Then, it is important that we process any frames
1256 // that we might return into.
1257 StackWatermarkSet::before_unwind(current);
1258
1259 // We are called during regular safepoints and when the VM is
1260 // single stepping. If any thread is marked for single stepping,
1261 // then we may have JVMTI work to do.
1262 LastFrameAccessor last_frame(current);
1263 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1264 }
1265 JRT_END
1266
1267 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1268 assert(current == JavaThread::current(), "pre-condition");
1269 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1270 // This function is called by the interpreter when the return poll found a reason
1271 // to call the VM. The reason could be that we are returning into a not yet safe
1272 // to access frame. We handle that below.
1273 // Note that this path does not check for single stepping, because we do not want
1274 // to single step when unwinding frames for an exception being thrown. Instead,
1275 // such single stepping code will use the safepoint table, which will use the
1276 // InterpreterRuntime::at_safepoint callback.
1277 StackWatermarkSet::before_unwind(current);
1278 JRT_END
1279
1280 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1281 ResolvedFieldEntry* entry))
1282
1283 // check the access_flags for the field in the klass
1284 InstanceKlass* ik = entry->field_holder();
1285 int index = entry->field_index();
1286 if (!ik->field_status(index).is_access_watched()) return;
1287
1288 bool is_static = (obj == nullptr);
1289 bool is_flat = entry->is_flat();
1290 HandleMark hm(current);
1291
1292 Handle h_obj;
1293 if (!is_static) {
1294 // non-static field accessors have an object, but we need a handle
1295 h_obj = Handle(current, obj);
1296 }
1297 InstanceKlass* field_holder = entry->field_holder(); // HERE
1298 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static, is_flat);
1299 LastFrameAccessor last_frame(current);
1300 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1301 JRT_END
1302
1303 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1304 ResolvedFieldEntry* entry, jvalue* value))
1305
1306 // check the access_flags for the field in the klass
1307 InstanceKlass* ik = entry->field_holder();
1308 int index = entry->field_index();
1309 // bail out if field modifications are not watched
1310 if (!ik->field_status(index).is_modification_watched()) return;
1311
1312 char sig_type = '\0';
1313
1314 switch((TosState)entry->tos_state()) {
1315 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1316 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1317 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1318 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1319 case itos: sig_type = JVM_SIGNATURE_INT; break;
1320 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1321 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1322 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1323 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1324 default: ShouldNotReachHere(); return;
1325 }
1326
1327 bool is_static = (obj == nullptr);
1328 bool is_flat = entry->is_flat();
1329
1330 HandleMark hm(current);
1331 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static, is_flat);
1332 jvalue fvalue;
1333 #ifdef _LP64
1334 fvalue = *value;
1335 #else
1336 // Long/double values are stored unaligned and also noncontiguously with
1337 // tagged stacks. We can't just do a simple assignment even in the non-
1338 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1339 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1340 // We assume that the two halves of longs/doubles are stored in interpreter
1341 // stack slots in platform-endian order.
1342 jlong_accessor u;
1343 jint* newval = (jint*)value;
1344 u.words[0] = newval[0];
1345 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1346 fvalue.j = u.long_value;
1347 #endif // _LP64
1348
1349 Handle h_obj;
1350 if (!is_static) {
1351 // non-static field accessors have an object, but we need a handle
1352 h_obj = Handle(current, obj);
1353 }
1354
1355 LastFrameAccessor last_frame(current);
1356 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1357 fid, sig_type, &fvalue);
1358 JRT_END
1359
1360 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1361 LastFrameAccessor last_frame(current);
1362 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1363 JRT_END
1364
1365
1366 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1367 // before transitioning to VM, and restore it after transitioning back
1368 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1369 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1370 LastFrameAccessor last_frame(current);
1371 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1372 JRT_END
1373
1374 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1375 {
1376 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1377 }
1378 JRT_END
1379
1380
1381 // Implementation of SignatureHandlerLibrary
1382
1383 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1384 // Dummy definition (else normalization method is defined in CPU
1385 // dependent code)
1386 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1387 return fingerprint;
1388 }
1389 #endif
1390
1391 address SignatureHandlerLibrary::set_handler_blob() {
1392 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1393 if (handler_blob == nullptr) {
1394 return nullptr;
1395 }
1396 address handler = handler_blob->code_begin();
1397 _handler_blob = handler_blob;
1398 _handler = handler;
1399 return handler;
1400 }
1401
1402 void SignatureHandlerLibrary::initialize() {
1403 if (_fingerprints != nullptr) {
1404 return;
1405 }
1406 if (set_handler_blob() == nullptr) {
1407 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1408 }
1409
1410 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1411 SignatureHandlerLibrary::buffer_size);
1412 _buffer = bb->code_begin();
1413
1414 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1415 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1416 }
1417
1418 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1419 address handler = _handler;
1420 int insts_size = buffer->pure_insts_size();
1421 if (handler + insts_size > _handler_blob->code_end()) {
1422 // get a new handler blob
1423 handler = set_handler_blob();
1424 }
1425 if (handler != nullptr) {
1426 memcpy(handler, buffer->insts_begin(), insts_size);
1427 pd_set_handler(handler);
1428 ICache::invalidate_range(handler, insts_size);
1429 _handler = handler + insts_size;
1430 }
1431 return handler;
1432 }
1433
1434 void SignatureHandlerLibrary::add(const methodHandle& method) {
1435 if (method->signature_handler() == nullptr) {
1436 // use slow signature handler if we can't do better
1437 int handler_index = -1;
1438 // check if we can use customized (fast) signature handler
1439 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1440 // use customized signature handler
1441 MutexLocker mu(SignatureHandlerLibrary_lock);
1442 // make sure data structure is initialized
1443 initialize();
1444 // lookup method signature's fingerprint
1445 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1446 // allow CPU dependent code to optimize the fingerprints for the fast handler
1447 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1448 handler_index = _fingerprints->find(fingerprint);
1449 // create handler if necessary
1450 if (handler_index < 0) {
1451 ResourceMark rm;
1452 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1453 CodeBuffer buffer((address)(_buffer + align_offset),
1454 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1455 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1456 // copy into code heap
1457 address handler = set_handler(&buffer);
1458 if (handler == nullptr) {
1459 // use slow signature handler (without memorizing it in the fingerprints)
1460 } else {
1461 // debugging support
1462 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1463 ttyLocker ttyl;
1464 tty->cr();
1465 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1466 _handlers->length(),
1467 (method->is_static() ? "static" : "receiver"),
1468 method->name_and_sig_as_C_string(),
1469 fingerprint,
1470 buffer.insts_size());
1471 if (buffer.insts_size() > 0) {
1472 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1473 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1474 }
1475 #ifndef PRODUCT
1476 address rh_begin = Interpreter::result_handler(method()->result_type());
1477 if (CodeCache::contains(rh_begin)) {
1478 // else it might be special platform dependent values
1479 tty->print_cr(" --- associated result handler ---");
1480 address rh_end = rh_begin;
1481 while (*(int*)rh_end != 0) {
1482 rh_end += sizeof(int);
1483 }
1484 Disassembler::decode(rh_begin, rh_end);
1485 } else {
1486 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1487 }
1488 #endif
1489 }
1490 // add handler to library
1491 _fingerprints->append(fingerprint);
1492 _handlers->append(handler);
1493 // set handler index
1494 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1495 handler_index = _fingerprints->length() - 1;
1496 }
1497 }
1498 // Set handler under SignatureHandlerLibrary_lock
1499 if (handler_index < 0) {
1500 // use generic signature handler
1501 method->set_signature_handler(Interpreter::slow_signature_handler());
1502 } else {
1503 // set handler
1504 method->set_signature_handler(_handlers->at(handler_index));
1505 }
1506 } else {
1507 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1508 // use generic signature handler
1509 method->set_signature_handler(Interpreter::slow_signature_handler());
1510 }
1511 }
1512 #ifdef ASSERT
1513 int handler_index = -1;
1514 int fingerprint_index = -2;
1515 {
1516 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1517 // in any way if accessed from multiple threads. To avoid races with another
1518 // thread which may change the arrays in the above, mutex protected block, we
1519 // have to protect this read access here with the same mutex as well!
1520 MutexLocker mu(SignatureHandlerLibrary_lock);
1521 if (_handlers != nullptr) {
1522 handler_index = _handlers->find(method->signature_handler());
1523 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1524 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1525 fingerprint_index = _fingerprints->find(fingerprint);
1526 }
1527 }
1528 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1529 handler_index == fingerprint_index, "sanity check");
1530 #endif // ASSERT
1531 }
1532
1533 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1534 address SignatureHandlerLibrary::_handler = nullptr;
1535 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1536 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1537 address SignatureHandlerLibrary::_buffer = nullptr;
1538
1539
1540 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1541 methodHandle m(current, method);
1542 assert(m->is_native(), "sanity check");
1543 // lookup native function entry point if it doesn't exist
1544 if (!m->has_native_function()) {
1545 NativeLookup::lookup(m, CHECK);
1546 }
1547 // make sure signature handler is installed
1548 SignatureHandlerLibrary::add(m);
1549 // The interpreter entry point checks the signature handler first,
1550 // before trying to fetch the native entry point and klass mirror.
1551 // We must set the signature handler last, so that multiple processors
1552 // preparing the same method will be sure to see non-null entry & mirror.
1553 JRT_END
1554
1555 #if defined(AMD64) || defined(ARM)
1556 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1557 assert(current == JavaThread::current(), "pre-condition");
1558 if (src_address == dest_address) {
1559 return;
1560 }
1561 ResourceMark rm;
1562 LastFrameAccessor last_frame(current);
1563 assert(last_frame.is_interpreted_frame(), "");
1564 jint bci = last_frame.bci();
1565 methodHandle mh(current, last_frame.method());
1566 Bytecode_invoke invoke(mh, bci);
1567 ArgumentSizeComputer asc(invoke.signature());
1568 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1569 Copy::conjoint_jbytes(src_address, dest_address,
1570 size_of_arguments * Interpreter::stackElementSize);
1571 JRT_END
1572 #endif
1573
1574 #if INCLUDE_JVMTI
1575 // This is a support of the JVMTI PopFrame interface.
1576 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1577 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters.
1578 // The member_name argument is a saved reference (in local#0) to the member_name.
1579 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1580 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1581 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1582 Method* method, address bcp))
1583 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1584 if (code != Bytecodes::_invokestatic) {
1585 return;
1586 }
1587 ConstantPool* cpool = method->constants();
1588 int cp_index = Bytes::get_native_u2(bcp + 1);
1589 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1590 Symbol* mname = cpool->name_ref_at(cp_index, code);
1591
1592 if (MethodHandles::has_member_arg(cname, mname)) {
1593 oop member_name_oop = cast_to_oop(member_name);
1594 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1595 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1596 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1597 }
1598 current->set_vm_result_oop(member_name_oop);
1599 } else {
1600 current->set_vm_result_oop(nullptr);
1601 }
1602 JRT_END
1603 #endif // INCLUDE_JVMTI
1604
1605 #ifndef PRODUCT
1606 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1607 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1608 // The generated code still uses call_VM because that will set up the frame pointer for
1609 // bcp and method.
1610 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1611 assert(current == JavaThread::current(), "pre-condition");
1612 LastFrameAccessor last_frame(current);
1613 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1614 methodHandle mh(current, last_frame.method());
1615 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2, tty);
1616 return preserve_this_value;
1617 JRT_END
1618 #endif // !PRODUCT
1619
1620 #ifdef ASSERT
1621 bool InterpreterRuntime::is_preemptable_call(address entry_point) {
1622 return entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter) ||
1623 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache) ||
1624 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::_new);
1625 }
1626 #endif // ASSERT