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/oopMapCache.hpp"
41 #include "interpreter/templateTable.hpp"
42 #include "jvm_io.h"
43 #include "logging/log.hpp"
44 #include "memory/oopFactory.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/constantPool.inline.hpp"
48 #include "oops/cpCache.inline.hpp"
49 #include "oops/flatArrayKlass.hpp"
50 #include "oops/flatArrayOop.inline.hpp"
51 #include "oops/inlineKlass.inline.hpp"
52 #include "oops/instanceKlass.inline.hpp"
53 #include "oops/klass.inline.hpp"
54 #include "oops/method.inline.hpp"
55 #include "oops/methodData.hpp"
56 #include "oops/objArrayKlass.hpp"
57 #include "oops/objArrayOop.inline.hpp"
58 #include "oops/oop.inline.hpp"
59 #include "oops/oopsHierarchy.hpp"
60 #include "oops/symbol.hpp"
61 #include "oops/valuePayload.inline.hpp"
62 #include "prims/jvmtiExport.hpp"
63 #include "prims/methodHandles.hpp"
64 #include "prims/nativeLookup.hpp"
65 #include "runtime/continuation.hpp"
66 #include "runtime/deoptimization.hpp"
67 #include "runtime/fieldDescriptor.inline.hpp"
68 #include "runtime/frame.inline.hpp"
69 #include "runtime/handles.inline.hpp"
70 #include "runtime/icache.hpp"
71 #include "runtime/interfaceSupport.inline.hpp"
72 #include "runtime/java.hpp"
73 #include "runtime/javaCalls.hpp"
74 #include "runtime/jfieldIDWorkaround.hpp"
75 #include "runtime/osThread.hpp"
76 #include "runtime/sharedRuntime.hpp"
77 #include "runtime/stackWatermarkSet.hpp"
78 #include "runtime/stubRoutines.hpp"
79 #include "runtime/synchronizer.hpp"
80 #include "utilities/align.hpp"
81 #include "utilities/checkedCast.hpp"
82 #include "utilities/copy.hpp"
83 #include "utilities/events.hpp"
84 #include "utilities/exceptions.hpp"
85 #include "utilities/globalDefinitions.hpp"
86 #if INCLUDE_JFR
87 #include "jfr/jfr.inline.hpp"
88 #endif
89
90 // Helper class to access current interpreter state
91 class LastFrameAccessor : public StackObj {
92 frame _last_frame;
93 public:
94 LastFrameAccessor(JavaThread* current) {
95 assert(current == Thread::current(), "sanity");
96 _last_frame = current->last_frame();
97 }
98 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
99 Method* method() const { return _last_frame.interpreter_frame_method(); }
100 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
101 int bci() const { return _last_frame.interpreter_frame_bci(); }
102 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
103
104 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
105 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
106
107 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
108 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
109
110 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
111 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
112 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
113 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
114 int number_of_dimensions() const { return bcp()[3]; }
115
116 oop callee_receiver(Symbol* signature) {
117 return _last_frame.interpreter_callee_receiver(signature);
118 }
119 BasicObjectLock* monitor_begin() const {
120 return _last_frame.interpreter_frame_monitor_begin();
121 }
122 BasicObjectLock* monitor_end() const {
123 return _last_frame.interpreter_frame_monitor_end();
124 }
125 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
126 return _last_frame.next_monitor_in_interpreter_frame(current);
127 }
128
129 frame& get_frame() { return _last_frame; }
130 };
131
132 //------------------------------------------------------------------------------------------------------------------------
133 // State accessors
134
135 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
136 LastFrameAccessor last_frame(current);
137 last_frame.set_bcp(bcp);
138 if (ProfileInterpreter) {
139 // ProfileTraps uses MDOs independently of ProfileInterpreter.
140 // That is why we must check both ProfileInterpreter and mdo != nullptr.
141 MethodData* mdo = last_frame.method()->method_data();
142 if (mdo != nullptr) {
143 NEEDS_CLEANUP;
144 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
145 }
146 }
147 }
148
149 //------------------------------------------------------------------------------------------------------------------------
150 // Constants
151
152
153 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
154 // access constant pool
155 LastFrameAccessor last_frame(current);
156 ConstantPool* pool = last_frame.method()->constants();
157 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
158 constantTag tag = pool->tag_at(cp_index);
159
160 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
161 Klass* klass = pool->klass_at(cp_index, CHECK);
162 oop java_class = klass->java_mirror();
163 current->set_vm_result_oop(java_class);
164 JRT_END
165
166 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
167 assert(bytecode == Bytecodes::_ldc ||
168 bytecode == Bytecodes::_ldc_w ||
169 bytecode == Bytecodes::_ldc2_w ||
170 bytecode == Bytecodes::_fast_aldc ||
171 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
172 ResourceMark rm(current);
173 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
174 bytecode == Bytecodes::_fast_aldc_w);
175 LastFrameAccessor last_frame(current);
176 methodHandle m (current, last_frame.method());
177 Bytecode_loadconstant ldc(m, last_frame.bci());
178
179 // Double-check the size. (Condy can have any type.)
180 BasicType type = ldc.result_type();
181 switch (type2size[type]) {
182 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
183 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
184 default: ShouldNotReachHere();
185 }
186
187 // Resolve the constant. This does not do unboxing.
188 // But it does replace Universe::the_null_sentinel by null.
189 oop result = ldc.resolve_constant(CHECK);
190 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
191
192 #ifdef ASSERT
193 {
194 // The bytecode wrappers aren't GC-safe so construct a new one
195 Bytecode_loadconstant ldc2(m, last_frame.bci());
196 int rindex = ldc2.cache_index();
197 if (rindex < 0)
198 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
199 if (rindex >= 0) {
200 oop coop = m->constants()->resolved_reference_at(rindex);
201 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
202 assert(roop == coop, "expected result for assembly code");
203 }
204 }
205 #endif
206 current->set_vm_result_oop(result);
207 if (!is_fast_aldc) {
208 // Tell the interpreter how to unbox the primitive.
209 guarantee(java_lang_boxing_object::is_instance(result, type), "");
210 int offset = java_lang_boxing_object::value_offset(type);
211 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
212 | (offset & ConstantPoolCache::field_index_mask));
213 current->set_vm_result_metadata((Metadata*)flags);
214 }
215 }
216 JRT_END
217
218
219 //------------------------------------------------------------------------------------------------------------------------
220 // Allocation
221
222 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
223 Klass* k = pool->klass_at(index, CHECK);
224 InstanceKlass* klass = InstanceKlass::cast(k);
225
226 // Make sure we are not instantiating an abstract klass
227 klass->check_valid_for_instantiation(true, CHECK);
228
229 // Make sure klass is initialized
230 klass->initialize_preemptable(CHECK_AND_CLEAR_PREEMPTED);
231
232 oop obj = klass->allocate_instance(CHECK);
233 current->set_vm_result_oop(obj);
234 JRT_END
235
236 JRT_BLOCK_ENTRY(void, InterpreterRuntime::read_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
237 assert(oopDesc::is_oop(obj), "Sanity check");
238
239 FlatFieldPayload payload(instanceOop(obj), entry);
240 if (payload.is_payload_null()) {
241 // If the payload is null return before entring the JRT_BLOCK.
242 current->set_vm_result_oop(nullptr);
243 return;
244 }
245 JRT_BLOCK
246 oop res = payload.read(CHECK);
247 current->set_vm_result_oop(res);
248 JRT_BLOCK_END
249 JRT_END
250
251 JRT_ENTRY(void, InterpreterRuntime::write_flat_field(JavaThread* current, oopDesc* obj, oopDesc* value, ResolvedFieldEntry* entry))
252 assert(oopDesc::is_oop(obj), "Sanity check");
253 assert(oopDesc::is_oop_or_null(value), "Sanity check");
254
255 FlatFieldPayload payload(instanceOop(obj), entry);
256 payload.write(inlineOop(value), CHECK);
257 JRT_END
258
259 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
260 oop obj = oopFactory::new_typeArray(type, size, CHECK);
261 current->set_vm_result_oop(obj);
262 JRT_END
263
264
265 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
266 Klass* klass = pool->klass_at(index, CHECK);
267 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
268 current->set_vm_result_oop(obj);
269 JRT_END
270
271 JRT_ENTRY(void, InterpreterRuntime::flat_array_load(JavaThread* current, arrayOopDesc* array, int index))
272 assert(array->is_flatArray(), "Must be");
273 flatArrayOop farray = (flatArrayOop)array;
274 oop res = farray->obj_at(index, CHECK);
275 current->set_vm_result_oop(res);
276 JRT_END
277
278 JRT_ENTRY(void, InterpreterRuntime::flat_array_store(JavaThread* current, oopDesc* val, arrayOopDesc* array, int index))
279 assert(array->is_flatArray(), "Must be");
280 flatArrayOop farray = (flatArrayOop)array;
281 farray->obj_at_put(index, val, CHECK);
282 JRT_END
283
284 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
285 // We may want to pass in more arguments - could make this slightly faster
286 LastFrameAccessor last_frame(current);
287 ConstantPool* constants = last_frame.method()->constants();
288 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
289 Klass* klass = constants->klass_at(i, CHECK);
290 int nof_dims = last_frame.number_of_dimensions();
291 assert(klass->is_klass(), "not a class");
292 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
293
294 // We must create an array of jints to pass to multi_allocate.
295 ResourceMark rm(current);
296 const int small_dims = 10;
297 jint dim_array[small_dims];
298 jint *dims = &dim_array[0];
299 if (nof_dims > small_dims) {
300 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
301 }
302 for (int index = 0; index < nof_dims; index++) {
303 // offset from first_size_address is addressed as local[index]
304 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
305 dims[index] = first_size_address[n];
306 }
307 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
308 current->set_vm_result_oop(obj);
309 JRT_END
310
311
312 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
313 assert(oopDesc::is_oop(obj), "must be a valid oop");
314 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
315 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
316 JRT_END
317
318 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
319 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
320
321 Handle ha(THREAD, aobj);
322 Handle hb(THREAD, bobj);
323 JavaValue result(T_BOOLEAN);
324 JavaCallArguments args;
325 args.push_oop(ha);
326 args.push_oop(hb);
327 methodHandle method(current, Universe::is_substitutable_method());
328 method->method_holder()->initialize(CHECK_false); // Ensure class ValueObjectMethods is initialized
329 JavaCalls::call(&result, method, &args, THREAD);
330 if (HAS_PENDING_EXCEPTION) {
331 // Something really bad happened because isSubstitutable() should not throw exceptions
332 // If it is an error, just let it propagate
333 // If it is an exception, wrap it into an InternalError
334 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
335 Handle e(THREAD, PENDING_EXCEPTION);
336 CLEAR_PENDING_EXCEPTION;
337 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
338 }
339 }
340 return result.get_jboolean();
341 JRT_END
342
343 // Quicken instance-of and check-cast bytecodes
344 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
345 // Force resolving; quicken the bytecode
346 LastFrameAccessor last_frame(current);
347 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
348 ConstantPool* cpool = last_frame.method()->constants();
349 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
350 // program we might have seen an unquick'd bytecode in the interpreter but have another
351 // thread quicken the bytecode before we get here.
352 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
353 Klass* klass = cpool->klass_at(which, CHECK);
354 current->set_vm_result_metadata(klass);
355 JRT_END
356
357
358 //------------------------------------------------------------------------------------------------------------------------
359 // Exceptions
360
361 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
362 const methodHandle& trap_method, int trap_bci) {
363 if (trap_method.not_null()) {
364 MethodData* trap_mdo = trap_method->method_data();
365 if (trap_mdo == nullptr) {
366 ExceptionMark em(current);
367 JavaThread* THREAD = current; // For exception macros.
368 Method::build_profiling_method_data(trap_method, THREAD);
369 if (HAS_PENDING_EXCEPTION) {
370 // Only metaspace OOM is expected. No Java code executed.
371 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
372 "we expect only an OOM error here");
373 CLEAR_PENDING_EXCEPTION;
374 }
375 trap_mdo = trap_method->method_data();
376 // and fall through...
377 }
378 if (trap_mdo != nullptr) {
379 // Update per-method count of trap events. The interpreter
380 // is updating the MDO to simulate the effect of compiler traps.
381 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
382 }
383 }
384 }
385
386 // Assume the compiler is (or will be) interested in this event.
387 // If necessary, create an MDO to hold the information, and record it.
388 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
389 assert(ProfileTraps, "call me only if profiling");
390 LastFrameAccessor last_frame(current);
391 methodHandle trap_method(current, last_frame.method());
392 int trap_bci = trap_method->bci_from(last_frame.bcp());
393 note_trap_inner(current, reason, trap_method, trap_bci);
394 }
395
396 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
397 // get klass
398 InstanceKlass* klass = InstanceKlass::cast(k);
399 assert(klass->is_initialized(),
400 "this klass should have been initialized during VM initialization");
401 // create instance - do not call constructor since we may have no
402 // (java) stack space left (should assert constructor is empty)
403 Handle exception;
404 oop exception_oop = klass->allocate_instance(CHECK_(exception));
405 exception = Handle(THREAD, exception_oop);
406 if (StackTraceInThrowable) {
407 java_lang_Throwable::fill_in_stack_trace(exception);
408 }
409 return exception;
410 }
411
412 // Special handling for stack overflow: since we don't have any (java) stack
413 // space left we use the pre-allocated & pre-initialized StackOverflowError
414 // klass to create an stack overflow error instance. We do not call its
415 // constructor for the same reason (it is empty, anyway).
416 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
417 Handle exception = get_preinitialized_exception(
418 vmClasses::StackOverflowError_klass(),
419 CHECK);
420 // Increment counter for hs_err file reporting
421 Exceptions::increment_stack_overflow_errors();
422 // Remove the ScopedValue bindings in case we got a StackOverflowError
423 // while we were trying to manipulate ScopedValue bindings.
424 current->clear_scopedValueBindings();
425 THROW_HANDLE(exception);
426 JRT_END
427
428 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
429 Handle exception = get_preinitialized_exception(
430 vmClasses::StackOverflowError_klass(),
431 CHECK);
432 java_lang_Throwable::set_message(exception(),
433 Universe::delayed_stack_overflow_error_message());
434 // Increment counter for hs_err file reporting
435 Exceptions::increment_stack_overflow_errors();
436 // Remove the ScopedValue bindings in case we got a StackOverflowError
437 // while we were trying to manipulate ScopedValue bindings.
438 current->clear_scopedValueBindings();
439 THROW_HANDLE(exception);
440 JRT_END
441
442 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
443 // lookup exception klass
444 TempNewSymbol s = SymbolTable::new_symbol(name);
445 if (ProfileTraps) {
446 if (s == vmSymbols::java_lang_ArithmeticException()) {
447 note_trap(current, Deoptimization::Reason_div0_check);
448 } else if (s == vmSymbols::java_lang_NullPointerException()) {
449 note_trap(current, Deoptimization::Reason_null_check);
450 }
451 }
452 // create exception
453 Handle exception = Exceptions::new_exception(current, s, message);
454 current->set_vm_result_oop(exception());
455 JRT_END
456
457
458 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
459 // Produce the error message first because note_trap can safepoint
460 ResourceMark rm(current);
461 const char* klass_name = obj->klass()->external_name();
462 // lookup exception klass
463 TempNewSymbol s = SymbolTable::new_symbol(name);
464 if (ProfileTraps) {
465 if (s == vmSymbols::java_lang_ArrayStoreException()) {
466 note_trap(current, Deoptimization::Reason_array_check);
467 } else {
468 note_trap(current, Deoptimization::Reason_class_check);
469 }
470 }
471 // create exception, with klass name as detail message
472 Handle exception = Exceptions::new_exception(current, s, klass_name);
473 current->set_vm_result_oop(exception());
474 JRT_END
475
476 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
477 // Produce the error message first because note_trap can safepoint
478 ResourceMark rm(current);
479 stringStream ss;
480 ss.print("Index %d out of bounds for length %d", index, a->length());
481
482 if (ProfileTraps) {
483 note_trap(current, Deoptimization::Reason_range_check);
484 }
485
486 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
487 JRT_END
488
489 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
490 JavaThread* current, oopDesc* obj))
491
492 // Produce the error message first because note_trap can safepoint
493 ResourceMark rm(current);
494 char* message = SharedRuntime::generate_class_cast_message(
495 current, obj->klass());
496
497 if (ProfileTraps) {
498 note_trap(current, Deoptimization::Reason_class_check);
499 }
500
501 // create exception
502 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
503 JRT_END
504
505 // exception_handler_for_exception(...) returns the continuation address,
506 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
507 // The exception oop is returned to make sure it is preserved over GC (it
508 // is only on the stack if the exception was thrown explicitly via athrow).
509 // During this operation, the expression stack contains the values for the
510 // bci where the exception happened. If the exception was propagated back
511 // from a call, the expression stack contains the values for the bci at the
512 // invoke w/o arguments (i.e., as if one were inside the call).
513 // Note that the implementation of this method assumes it's only called when an exception has actually occured
514 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
515 // We get here after we have unwound from a callee throwing an exception
516 // into the interpreter. Any deferred stack processing is notified of
517 // the event via the StackWatermarkSet.
518 StackWatermarkSet::after_unwind(current);
519
520 LastFrameAccessor last_frame(current);
521 Handle h_exception(current, exception);
522 methodHandle h_method (current, last_frame.method());
523 constantPoolHandle h_constants(current, h_method->constants());
524 bool should_repeat;
525 int handler_bci;
526 int current_bci = last_frame.bci();
527
528 if (current->frames_to_pop_failed_realloc() > 0) {
529 // Allocation of scalar replaced object used in this frame
530 // failed. Unconditionally pop the frame.
531 current->dec_frames_to_pop_failed_realloc();
532 current->set_vm_result_oop(h_exception());
533 // If the method is synchronized we already unlocked the monitor
534 // during deoptimization so the interpreter needs to skip it when
535 // the frame is popped.
536 current->set_do_not_unlock_if_synchronized(true);
537 return Interpreter::remove_activation_entry();
538 }
539
540 // Need to do this check first since when _do_not_unlock_if_synchronized
541 // is set, we don't want to trigger any classloading which may make calls
542 // into java, or surprisingly find a matching exception handler for bci 0
543 // since at this moment the method hasn't been "officially" entered yet.
544 if (current->do_not_unlock_if_synchronized()) {
545 ResourceMark rm;
546 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
547 current->set_vm_result_oop(exception);
548 return Interpreter::remove_activation_entry();
549 }
550
551 do {
552 should_repeat = false;
553
554 // assertions
555 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
556 // Check that exception is a subclass of Throwable.
557 assert(h_exception->is_a(vmClasses::Throwable_klass()),
558 "Exception not subclass of Throwable");
559
560 // tracing
561 if (log_is_enabled(Info, exceptions)) {
562 ResourceMark rm(current);
563 stringStream tempst;
564 tempst.print("interpreter method <%s>\n"
565 " at bci %d for thread " INTPTR_FORMAT " (%s)",
566 h_method->print_value_string(), current_bci, p2i(current), current->name());
567 Exceptions::log_exception(h_exception, tempst.as_string());
568 }
569 if (log_is_enabled(Info, exceptions, stacktrace)) {
570 Exceptions::log_exception_stacktrace(h_exception, h_method, current_bci);
571 }
572
573 // Don't go paging in something which won't be used.
574 // else if (extable->length() == 0) {
575 // // disabled for now - interpreter is not using shortcut yet
576 // // (shortcut is not to call runtime if we have no exception handlers)
577 // // warning("performance bug: should not call runtime if method has no exception handlers");
578 // }
579 // for AbortVMOnException flag
580 Exceptions::debug_check_abort(h_exception);
581
582 // exception handler lookup
583 Klass* klass = h_exception->klass();
584 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
585 if (HAS_PENDING_EXCEPTION) {
586 // We threw an exception while trying to find the exception handler.
587 // Transfer the new exception to the exception handle which will
588 // be set into thread local storage, and do another lookup for an
589 // exception handler for this exception, this time starting at the
590 // BCI of the exception handler which caused the exception to be
591 // thrown (bug 4307310).
592 h_exception = Handle(THREAD, PENDING_EXCEPTION);
593 CLEAR_PENDING_EXCEPTION;
594 if (handler_bci >= 0) {
595 current_bci = handler_bci;
596 should_repeat = true;
597 }
598 }
599 } while (should_repeat == true);
600
601 #if INCLUDE_JVMCI
602 if (EnableJVMCI && h_method->method_data() != nullptr) {
603 ResourceMark rm(current);
604 MethodData* mdo = h_method->method_data();
605
606 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
607 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
608
609 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
610 if (pdata != nullptr && pdata->is_BitData()) {
611 BitData* bit_data = (BitData*) pdata;
612 bit_data->set_exception_seen();
613 }
614 }
615 #endif
616
617 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
618 // time throw or a stack unwinding throw and accordingly notify the debugger
619 if (JvmtiExport::can_post_on_exceptions()) {
620 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
621 }
622
623 address continuation = nullptr;
624 address handler_pc = nullptr;
625 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
626 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
627 // handler in this method, or (b) after a stack overflow there is not yet
628 // enough stack space available to reprotect the stack.
629 continuation = Interpreter::remove_activation_entry();
630 #if COMPILER2_OR_JVMCI
631 // Count this for compilation purposes
632 h_method->interpreter_throwout_increment(THREAD);
633 #endif
634 } else {
635 // handler in this method => change bci/bcp to handler bci/bcp and continue there
636 handler_pc = h_method->code_base() + handler_bci;
637 h_method->set_exception_handler_entered(handler_bci); // profiling
638 #ifndef ZERO
639 set_bcp_and_mdp(handler_pc, current);
640 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
641 #else
642 continuation = (address)(intptr_t) handler_bci;
643 #endif
644 }
645
646 // notify debugger of an exception catch
647 // (this is good for exceptions caught in native methods as well)
648 if (JvmtiExport::can_post_on_exceptions()) {
649 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
650 }
651
652 current->set_vm_result_oop(h_exception());
653 return continuation;
654 JRT_END
655
656
657 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
658 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
659 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
660 JRT_END
661
662
663 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
664 THROW(vmSymbols::java_lang_AbstractMethodError());
665 JRT_END
666
667 // This method is called from the "abstract_entry" of the interpreter.
668 // At that point, the arguments have already been removed from the stack
669 // and therefore we don't have the receiver object at our fingertips. (Though,
670 // on some platforms the receiver still resides in a register...). Thus,
671 // we have no choice but print an error message not containing the receiver
672 // type.
673 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
674 Method* missingMethod))
675 ResourceMark rm(current);
676 assert(missingMethod != nullptr, "sanity");
677 methodHandle m(current, missingMethod);
678 LinkResolver::throw_abstract_method_error(m, THREAD);
679 JRT_END
680
681 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
682 Klass* recvKlass,
683 Method* missingMethod))
684 ResourceMark rm(current);
685 methodHandle mh = methodHandle(current, missingMethod);
686 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
687 JRT_END
688
689 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
690 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
691 JRT_END
692
693 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
694 Klass* recvKlass,
695 Klass* interfaceKlass))
696 ResourceMark rm(current);
697 char buf[1000];
698 buf[0] = '\0';
699 jio_snprintf(buf, sizeof(buf),
700 "Class %s does not implement the requested interface %s",
701 recvKlass ? recvKlass->external_name() : "nullptr",
702 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
703 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
704 JRT_END
705
706 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
707 THROW(vmSymbols::java_lang_NullPointerException());
708 JRT_END
709
710 //------------------------------------------------------------------------------------------------------------------------
711 // Fields
712 //
713
714 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, TRAPS) {
715 JavaThread* current = THREAD;
716 LastFrameAccessor last_frame(current);
717 constantPoolHandle pool(current, last_frame.method()->constants());
718 methodHandle m(current, last_frame.method());
719
720 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, ClassInitMode::init_preemptable, THREAD);
721 }
722
723 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
724 methodHandle& m,
725 constantPoolHandle& pool,
726 ClassInitMode init_mode, TRAPS) {
727 fieldDescriptor info;
728 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
729 bytecode == Bytecodes::_putstatic);
730 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
731
732 {
733 JvmtiHideSingleStepping jhss(THREAD);
734 LinkResolver::resolve_field_access(info, pool, field_index, m, bytecode, init_mode, CHECK);
735 } // end JvmtiHideSingleStepping
736
737 // check if link resolution caused cpCache to be updated
738 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
739
740 // compute auxiliary field attributes
741 TosState state = as_TosState(info.field_type());
742
743 // Resolution of put instructions on final fields is delayed. That is required so that
744 // exceptions are thrown at the correct place (when the instruction is actually invoked).
745 // If we do not resolve an instruction in the current pass, leaving the put_code
746 // set to zero will cause the next put instruction to the same field to reresolve.
747
748 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
749 // to final instance fields with updates originating from a method different than <init>)
750 // is inhibited. A putfield instruction targeting an instance final field must throw
751 // an IllegalAccessError if the instruction is not in an instance
752 // initializer method <init>. If resolution were not inhibited, a putfield
753 // in an initializer method could be resolved in the initializer. Subsequent
754 // putfield instructions to the same field would then use cached information.
755 // As a result, those instructions would not pass through the VM. That is,
756 // checks in resolve_field_access() would not be executed for those instructions
757 // and the required IllegalAccessError would not be thrown.
758 //
759 // Also, we need to delay resolving getstatic and putstatic instructions until the
760 // class is initialized. This is required so that access to the static
761 // field will call the initialization function every time until the class
762 // is completely initialized ala. in 2.17.5 in JVM Specification.
763 InstanceKlass* klass = info.field_holder();
764 bool uninitialized_static = is_static && !klass->is_initialized();
765 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
766 info.has_initialized_final_update();
767 bool strict_static_final = info.is_strict() && info.is_static() && info.is_final();
768 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
769
770 Bytecodes::Code get_code = (Bytecodes::Code)0;
771 Bytecodes::Code put_code = (Bytecodes::Code)0;
772 if (uninitialized_static && (info.is_strict_static_unset() || strict_static_final)) {
773 // During <clinit>, closely track the state of strict statics.
774 // 1. if we are reading an uninitialized strict static, throw
775 // 2. if we are writing one, clear the "unset" flag
776 //
777 // Note: If we were handling an attempted write of a null to a
778 // null-restricted strict static, we would NOT clear the "unset"
779 // flag.
780 assert(klass->is_being_initialized(), "else should have thrown");
781 assert(klass->is_reentrant_initialization(THREAD),
782 "<clinit> must be running in current thread");
783 klass->notify_strict_static_access(info.index(), is_put, CHECK);
784 assert(!info.is_strict_static_unset(), "after initialization, no unset flags");
785 } else if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) {
786 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
787 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
788 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
789 }
790 }
791
792 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
793 entry->fill_in(info, checked_cast<u1>(state),
794 static_cast<u1>(get_code), static_cast<u1>(put_code));
795 }
796
797
798 //------------------------------------------------------------------------------------------------------------------------
799 // Synchronization
800 //
801 // The interpreter's synchronization code is factored out so that it can
802 // be shared by method invocation and synchronized blocks.
803 //%note synchronization_3
804
805 //%note monitor_1
806 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
807 #ifdef ASSERT
808 current->last_frame().interpreter_frame_verify_monitor(elem);
809 #endif
810 Handle h_obj(current, elem->obj());
811 assert(Universe::heap()->is_in_or_null(h_obj()),
812 "must be null or an object");
813 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
814 assert(Universe::heap()->is_in_or_null(elem->obj()),
815 "must be null or an object");
816 #ifdef ASSERT
817 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
818 #endif
819 JRT_END
820
821 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
822 oop obj = elem->obj();
823 assert(Universe::heap()->is_in(obj), "must be an object");
824 // The object could become unlocked through a JNI call, which we have no other checks for.
825 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
826 if (obj->is_unlocked()) {
827 if (CheckJNICalls) {
828 fatal("Object has been unlocked by JNI");
829 }
830 return;
831 }
832 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
833 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
834 // again at method exit or in the case of an exception.
835 elem->set_obj(nullptr);
836 JRT_END
837
838 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
839 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
840 JRT_END
841
842 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
843 // Returns an illegal exception to install into the current thread. The
844 // pending_exception flag is cleared so normal exception handling does not
845 // trigger. Any current installed exception will be overwritten. This
846 // method will be called during an exception unwind.
847
848 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
849 Handle exception(current, current->vm_result_oop());
850 assert(exception() != nullptr, "vm result should be set");
851 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
852 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
853 current->set_vm_result_oop(exception());
854 JRT_END
855
856 JRT_ENTRY(void, InterpreterRuntime::throw_identity_exception(JavaThread* current, oopDesc* obj))
857 Klass* klass = cast_to_oop(obj)->klass();
858 ResourceMark rm(THREAD);
859 const char* desc = "Cannot synchronize on an instance of value class ";
860 const char* className = klass->external_name();
861 size_t msglen = strlen(desc) + strlen(className) + 1;
862 char* message = NEW_RESOURCE_ARRAY(char, msglen);
863 if (nullptr == message) {
864 // Out of memory: can't create detailed error message
865 THROW_MSG(vmSymbols::java_lang_IdentityException(), className);
866 } else {
867 jio_snprintf(message, msglen, "%s%s", desc, className);
868 THROW_MSG(vmSymbols::java_lang_IdentityException(), message);
869 }
870 JRT_END
871
872 //------------------------------------------------------------------------------------------------------------------------
873 // Invokes
874
875 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
876 return method->orig_bytecode_at(method->bci_from(bcp));
877 JRT_END
878
879 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
880 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
881 JRT_END
882
883 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
884 JvmtiExport::post_raw_breakpoint(current, method, bcp);
885 JRT_END
886
887 void InterpreterRuntime::resolve_invoke(Bytecodes::Code bytecode, TRAPS) {
888 JavaThread* current = THREAD;
889 LastFrameAccessor last_frame(current);
890 // extract receiver from the outgoing argument list if necessary
891 Handle receiver(current, nullptr);
892 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
893 bytecode == Bytecodes::_invokespecial) {
894 ResourceMark rm(current);
895 methodHandle m (current, last_frame.method());
896 Bytecode_invoke call(m, last_frame.bci());
897 Symbol* signature = call.signature();
898 receiver = Handle(current, last_frame.callee_receiver(signature));
899
900 assert(Universe::heap()->is_in_or_null(receiver()),
901 "sanity check");
902 assert(receiver.is_null() ||
903 !Universe::heap()->is_in(receiver->klass()),
904 "sanity check");
905 }
906
907 // resolve method
908 CallInfo info;
909 constantPoolHandle pool(current, last_frame.method()->constants());
910
911 methodHandle resolved_method;
912
913 int method_index = last_frame.get_index_u2(bytecode);
914 {
915 JvmtiHideSingleStepping jhss(current);
916 LinkResolver::resolve_invoke(info, receiver, pool,
917 method_index, bytecode,
918 ClassInitMode::init_preemptable, THREAD);
919
920 if (HAS_PENDING_EXCEPTION) {
921 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
922 // Preserve the original exception across the call to note_trap()
923 PreserveExceptionMark pm(current);
924 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
925 note_trap(current, Deoptimization::Reason_null_check);
926 }
927 return;
928 }
929
930 resolved_method = methodHandle(current, info.resolved_method());
931 } // end JvmtiHideSingleStepping
932
933 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
934 }
935
936 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
937 methodHandle& resolved_method,
938 constantPoolHandle& pool,
939 int method_index) {
940 // Don't allow safepoints until the method is cached.
941 NoSafepointVerifier nsv;
942
943 // check if link resolution caused cpCache to be updated
944 ConstantPoolCache* cache = pool->cache();
945 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
946
947 #ifdef ASSERT
948 if (bytecode == Bytecodes::_invokeinterface) {
949 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
950 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
951 // (see also CallInfo::set_interface for details)
952 assert(info.call_kind() == CallInfo::vtable_call ||
953 info.call_kind() == CallInfo::direct_call, "");
954 assert(resolved_method->is_final() || info.has_vtable_index(),
955 "should have been set already");
956 } else if (!resolved_method->has_itable_index()) {
957 // Resolved something like CharSequence.toString. Use vtable not itable.
958 assert(info.call_kind() != CallInfo::itable_call, "");
959 } else {
960 // Setup itable entry
961 assert(info.call_kind() == CallInfo::itable_call, "");
962 int index = resolved_method->itable_index();
963 assert(info.itable_index() == index, "");
964 }
965 } else if (bytecode == Bytecodes::_invokespecial) {
966 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
967 } else {
968 assert(info.call_kind() == CallInfo::direct_call ||
969 info.call_kind() == CallInfo::vtable_call, "");
970 }
971 #endif
972 // Get sender and only set cpCache entry to resolved if it is not an
973 // interface. The receiver for invokespecial calls within interface
974 // methods must be checked for every call.
975 InstanceKlass* sender = pool->pool_holder();
976
977 switch (info.call_kind()) {
978 case CallInfo::direct_call:
979 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
980 break;
981 case CallInfo::vtable_call:
982 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
983 break;
984 case CallInfo::itable_call:
985 cache->set_itable_call(
986 bytecode,
987 method_index,
988 info.resolved_klass(),
989 resolved_method,
990 info.itable_index());
991 break;
992 default: ShouldNotReachHere();
993 }
994 }
995
996 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
997 constantPoolHandle& pool, TRAPS) {
998 LinkInfo link_info(pool, method_index, bytecode, CHECK);
999
1000 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1001 CallInfo call_info;
1002 switch (bytecode) {
1003 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
1004 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1005 case Bytecodes::_invokestatic: LinkResolver::cds_resolve_static_call (call_info, link_info, CHECK); break;
1006 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1007
1008 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1009 }
1010 methodHandle resolved_method(THREAD, call_info.resolved_method());
1011 guarantee(resolved_method->method_holder()->is_linked(), "");
1012 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1013 } else {
1014 // FIXME: why a shared class is not linked yet?
1015 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1016 ResourceMark rm;
1017 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1018 log_info(aot, resolve)("Not resolved: class not linked: %s %s %s",
1019 resolved_iklass->in_aot_cache() ? "in_aot_cache" : "",
1020 resolved_iklass->init_state_name(),
1021 resolved_iklass->external_name());
1022 }
1023 }
1024
1025 // First time execution: Resolve symbols, create a permanent MethodType object.
1026 void InterpreterRuntime::resolve_invokehandle(TRAPS) {
1027 JavaThread* current = THREAD;
1028 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1029 LastFrameAccessor last_frame(current);
1030
1031 // resolve method
1032 CallInfo info;
1033 constantPoolHandle pool(current, last_frame.method()->constants());
1034 int method_index = last_frame.get_index_u2(bytecode);
1035 {
1036 JvmtiHideSingleStepping jhss(current);
1037 JavaThread* THREAD = current; // For exception macros.
1038 LinkResolver::resolve_invoke(info, Handle(), pool,
1039 method_index, bytecode,
1040 CHECK);
1041 } // end JvmtiHideSingleStepping
1042
1043 pool->cache()->set_method_handle(method_index, info);
1044 }
1045
1046 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1047 constantPoolHandle& pool, TRAPS) {
1048 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1049 CallInfo info;
1050 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1051
1052 pool->cache()->set_method_handle(raw_index, info);
1053 }
1054
1055 // First time execution: Resolve symbols, create a permanent CallSite object.
1056 void InterpreterRuntime::resolve_invokedynamic(TRAPS) {
1057 JavaThread* current = THREAD;
1058 LastFrameAccessor last_frame(current);
1059 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1060
1061 // resolve method
1062 CallInfo info;
1063 constantPoolHandle pool(current, last_frame.method()->constants());
1064 int index = last_frame.get_index_u4(bytecode);
1065 {
1066 JvmtiHideSingleStepping jhss(current);
1067 JavaThread* THREAD = current; // For exception macros.
1068 LinkResolver::resolve_invoke(info, Handle(), pool,
1069 index, bytecode, CHECK);
1070 } // end JvmtiHideSingleStepping
1071
1072 pool->cache()->set_dynamic_call(info, index);
1073 }
1074
1075 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1076 constantPoolHandle& pool, TRAPS) {
1077 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1078 CallInfo info;
1079 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1080 pool->cache()->set_dynamic_call(info, raw_index);
1081 }
1082
1083 // This function is the interface to the assembly code. It returns the resolved
1084 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1085 // This function will check for redefinition!
1086 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1087 switch (bytecode) {
1088 case Bytecodes::_getstatic:
1089 case Bytecodes::_putstatic:
1090 case Bytecodes::_getfield:
1091 case Bytecodes::_putfield:
1092 resolve_get_put(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1093 break;
1094 case Bytecodes::_invokevirtual:
1095 case Bytecodes::_invokespecial:
1096 case Bytecodes::_invokestatic:
1097 case Bytecodes::_invokeinterface:
1098 resolve_invoke(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1099 break;
1100 case Bytecodes::_invokehandle:
1101 resolve_invokehandle(THREAD);
1102 break;
1103 case Bytecodes::_invokedynamic:
1104 resolve_invokedynamic(THREAD);
1105 break;
1106 default:
1107 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1108 break;
1109 }
1110 }
1111 JRT_END
1112
1113 //------------------------------------------------------------------------------------------------------------------------
1114 // Miscellaneous
1115
1116
1117 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1118 // Enable WXWrite: the function is called directly by interpreter.
1119 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1120
1121 // frequency_counter_overflow_inner can throw async exception.
1122 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1123 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1124 if (branch_bcp != nullptr && nm != nullptr) {
1125 // This was a successful request for an OSR nmethod. Because
1126 // frequency_counter_overflow_inner ends with a safepoint check,
1127 // nm could have been unloaded so look it up again. It's unsafe
1128 // to examine nm directly since it might have been freed and used
1129 // for something else.
1130 LastFrameAccessor last_frame(current);
1131 Method* method = last_frame.method();
1132 int bci = method->bci_from(last_frame.bcp());
1133 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1134 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1135 if (nm != nullptr) {
1136 // in case the transition passed a safepoint we need to barrier this again
1137 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1138 nm = nullptr;
1139 }
1140 }
1141 }
1142 if (nm != nullptr && current->is_interp_only_mode()) {
1143 // Normally we never get an nm if is_interp_only_mode() is true, because
1144 // policy()->event has a check for this and won't compile the method when
1145 // true. However, it's possible for is_interp_only_mode() to become true
1146 // during the compilation. We don't want to return the nm in that case
1147 // because we want to continue to execute interpreted.
1148 nm = nullptr;
1149 }
1150 #ifndef PRODUCT
1151 if (TraceOnStackReplacement) {
1152 if (nm != nullptr) {
1153 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1154 nm->print();
1155 }
1156 }
1157 #endif
1158 return nm;
1159 }
1160
1161 JRT_ENTRY(nmethod*,
1162 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1163 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1164 // flag, in case this method triggers classloading which will call into Java.
1165 UnlockFlagSaver fs(current);
1166
1167 LastFrameAccessor last_frame(current);
1168 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1169 methodHandle method(current, last_frame.method());
1170 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1171 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1172
1173 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1174
1175 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1176 if (osr_nm != nullptr) {
1177 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1178 osr_nm = nullptr;
1179 }
1180 }
1181 return osr_nm;
1182 JRT_END
1183
1184 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1185 assert(ProfileInterpreter, "must be profiling interpreter");
1186 int bci = method->bci_from(cur_bcp);
1187 MethodData* mdo = method->method_data();
1188 if (mdo == nullptr) return 0;
1189 return mdo->bci_to_di(bci);
1190 JRT_END
1191
1192 #ifdef ASSERT
1193 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1194 assert(ProfileInterpreter, "must be profiling interpreter");
1195
1196 MethodData* mdo = method->method_data();
1197 assert(mdo != nullptr, "must not be null");
1198
1199 int bci = method->bci_from(bcp);
1200
1201 address mdp2 = mdo->bci_to_dp(bci);
1202 if (mdp != mdp2) {
1203 ResourceMark rm;
1204 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1205 int current_di = mdo->dp_to_di(mdp);
1206 int expected_di = mdo->dp_to_di(mdp2);
1207 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1208 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1209 int approx_bci = -1;
1210 if (current_di >= 0) {
1211 approx_bci = mdo->data_at(current_di)->bci();
1212 }
1213 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1214 mdo->print_on(tty);
1215 method->print_codes();
1216 }
1217 assert(mdp == mdp2, "wrong mdp");
1218 JRT_END
1219 #endif // ASSERT
1220
1221 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1222 assert(ProfileInterpreter, "must be profiling interpreter");
1223 ResourceMark rm(current);
1224 LastFrameAccessor last_frame(current);
1225 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1226 MethodData* h_mdo = last_frame.method()->method_data();
1227
1228 // Grab a lock to ensure atomic access to setting the return bci and
1229 // the displacement. This can block and GC, invalidating all naked oops.
1230 MutexLocker ml(RetData_lock);
1231
1232 // ProfileData is essentially a wrapper around a derived oop, so we
1233 // need to take the lock before making any ProfileData structures.
1234 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1235 guarantee(data != nullptr, "profile data must be valid");
1236 RetData* rdata = data->as_RetData();
1237 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1238 last_frame.set_mdp(new_mdp);
1239 JRT_END
1240
1241 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1242 return Method::build_method_counters(current, m);
1243 JRT_END
1244
1245
1246 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1247 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1248 // stack traversal automatically takes care of preserving arguments for invoke, so
1249 // this is no longer needed.
1250
1251 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1252 // if this is called during a safepoint
1253
1254 if (JvmtiExport::should_post_single_step()) {
1255 // This function is called by the interpreter when single stepping. Such single
1256 // stepping could unwind a frame. Then, it is important that we process any frames
1257 // that we might return into.
1258 StackWatermarkSet::before_unwind(current);
1259
1260 // We are called during regular safepoints and when the VM is
1261 // single stepping. If any thread is marked for single stepping,
1262 // then we may have JVMTI work to do.
1263 LastFrameAccessor last_frame(current);
1264 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1265 }
1266 JRT_END
1267
1268 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1269 assert(current == JavaThread::current(), "pre-condition");
1270 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1271 // This function is called by the interpreter when the return poll found a reason
1272 // to call the VM. The reason could be that we are returning into a not yet safe
1273 // to access frame. We handle that below.
1274 // Note that this path does not check for single stepping, because we do not want
1275 // to single step when unwinding frames for an exception being thrown. Instead,
1276 // such single stepping code will use the safepoint table, which will use the
1277 // InterpreterRuntime::at_safepoint callback.
1278 StackWatermarkSet::before_unwind(current);
1279 JRT_END
1280
1281 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1282 ResolvedFieldEntry* entry))
1283
1284 // check the access_flags for the field in the klass
1285 InstanceKlass* ik = entry->field_holder();
1286 int index = entry->field_index();
1287 if (!ik->field_status(index).is_access_watched()) return;
1288
1289 bool is_static = (obj == nullptr);
1290 bool is_flat = entry->is_flat();
1291 HandleMark hm(current);
1292
1293 Handle h_obj;
1294 if (!is_static) {
1295 // non-static field accessors have an object, but we need a handle
1296 h_obj = Handle(current, obj);
1297 }
1298 InstanceKlass* field_holder = entry->field_holder(); // HERE
1299 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static, is_flat);
1300 LastFrameAccessor last_frame(current);
1301 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1302 JRT_END
1303
1304 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1305 ResolvedFieldEntry* entry, jvalue* value))
1306
1307 // check the access_flags for the field in the klass
1308 InstanceKlass* ik = entry->field_holder();
1309 int index = entry->field_index();
1310 // bail out if field modifications are not watched
1311 if (!ik->field_status(index).is_modification_watched()) return;
1312
1313 char sig_type = '\0';
1314
1315 switch((TosState)entry->tos_state()) {
1316 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1317 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1318 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1319 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1320 case itos: sig_type = JVM_SIGNATURE_INT; break;
1321 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1322 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1323 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1324 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1325 default: ShouldNotReachHere(); return;
1326 }
1327
1328 bool is_static = (obj == nullptr);
1329 bool is_flat = entry->is_flat();
1330
1331 HandleMark hm(current);
1332 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static, is_flat);
1333 jvalue fvalue;
1334 #ifdef _LP64
1335 fvalue = *value;
1336 #else
1337 // Long/double values are stored unaligned and also noncontiguously with
1338 // tagged stacks. We can't just do a simple assignment even in the non-
1339 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1340 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1341 // We assume that the two halves of longs/doubles are stored in interpreter
1342 // stack slots in platform-endian order.
1343 jlong_accessor u;
1344 jint* newval = (jint*)value;
1345 u.words[0] = newval[0];
1346 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1347 fvalue.j = u.long_value;
1348 #endif // _LP64
1349
1350 Handle h_obj;
1351 if (!is_static) {
1352 // non-static field accessors have an object, but we need a handle
1353 h_obj = Handle(current, obj);
1354 }
1355
1356 LastFrameAccessor last_frame(current);
1357 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1358 fid, sig_type, &fvalue);
1359 JRT_END
1360
1361 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1362 LastFrameAccessor last_frame(current);
1363 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1364 JRT_END
1365
1366
1367 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1368 // before transitioning to VM, and restore it after transitioning back
1369 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1370 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1371 LastFrameAccessor last_frame(current);
1372 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1373 JRT_END
1374
1375 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1376 {
1377 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1378 }
1379 JRT_END
1380
1381
1382 // Implementation of SignatureHandlerLibrary
1383
1384 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1385 // Dummy definition (else normalization method is defined in CPU
1386 // dependent code)
1387 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1388 return fingerprint;
1389 }
1390 #endif
1391
1392 address SignatureHandlerLibrary::set_handler_blob() {
1393 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1394 if (handler_blob == nullptr) {
1395 return nullptr;
1396 }
1397 address handler = handler_blob->code_begin();
1398 _handler_blob = handler_blob;
1399 _handler = handler;
1400 return handler;
1401 }
1402
1403 void SignatureHandlerLibrary::initialize() {
1404 if (_fingerprints != nullptr) {
1405 return;
1406 }
1407 if (set_handler_blob() == nullptr) {
1408 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1409 }
1410
1411 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1412 SignatureHandlerLibrary::buffer_size);
1413 _buffer = bb->code_begin();
1414
1415 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1416 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1417 }
1418
1419 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1420 address handler = _handler;
1421 int insts_size = buffer->pure_insts_size();
1422 if (handler + insts_size > _handler_blob->code_end()) {
1423 // get a new handler blob
1424 handler = set_handler_blob();
1425 }
1426 if (handler != nullptr) {
1427 memcpy(handler, buffer->insts_begin(), insts_size);
1428 pd_set_handler(handler);
1429 ICache::invalidate_range(handler, insts_size);
1430 _handler = handler + insts_size;
1431 }
1432 return handler;
1433 }
1434
1435 void SignatureHandlerLibrary::add(const methodHandle& method) {
1436 if (method->signature_handler() == nullptr) {
1437 // use slow signature handler if we can't do better
1438 int handler_index = -1;
1439 // check if we can use customized (fast) signature handler
1440 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1441 // use customized signature handler
1442 MutexLocker mu(SignatureHandlerLibrary_lock);
1443 // make sure data structure is initialized
1444 initialize();
1445 // lookup method signature's fingerprint
1446 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1447 // allow CPU dependent code to optimize the fingerprints for the fast handler
1448 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1449 handler_index = _fingerprints->find(fingerprint);
1450 // create handler if necessary
1451 if (handler_index < 0) {
1452 ResourceMark rm;
1453 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1454 CodeBuffer buffer((address)(_buffer + align_offset),
1455 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1456 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1457 // copy into code heap
1458 address handler = set_handler(&buffer);
1459 if (handler == nullptr) {
1460 // use slow signature handler (without memorizing it in the fingerprints)
1461 } else {
1462 // debugging support
1463 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1464 ttyLocker ttyl;
1465 tty->cr();
1466 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1467 _handlers->length(),
1468 (method->is_static() ? "static" : "receiver"),
1469 method->name_and_sig_as_C_string(),
1470 fingerprint,
1471 buffer.insts_size());
1472 if (buffer.insts_size() > 0) {
1473 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1474 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1475 }
1476 #ifndef PRODUCT
1477 address rh_begin = Interpreter::result_handler(method()->result_type());
1478 if (CodeCache::contains(rh_begin)) {
1479 // else it might be special platform dependent values
1480 tty->print_cr(" --- associated result handler ---");
1481 address rh_end = rh_begin;
1482 while (*(int*)rh_end != 0) {
1483 rh_end += sizeof(int);
1484 }
1485 Disassembler::decode(rh_begin, rh_end);
1486 } else {
1487 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1488 }
1489 #endif
1490 }
1491 // add handler to library
1492 _fingerprints->append(fingerprint);
1493 _handlers->append(handler);
1494 // set handler index
1495 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1496 handler_index = _fingerprints->length() - 1;
1497 }
1498 }
1499 // Set handler under SignatureHandlerLibrary_lock
1500 if (handler_index < 0) {
1501 // use generic signature handler
1502 method->set_signature_handler(Interpreter::slow_signature_handler());
1503 } else {
1504 // set handler
1505 method->set_signature_handler(_handlers->at(handler_index));
1506 }
1507 } else {
1508 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1509 // use generic signature handler
1510 method->set_signature_handler(Interpreter::slow_signature_handler());
1511 }
1512 }
1513 #ifdef ASSERT
1514 int handler_index = -1;
1515 int fingerprint_index = -2;
1516 {
1517 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1518 // in any way if accessed from multiple threads. To avoid races with another
1519 // thread which may change the arrays in the above, mutex protected block, we
1520 // have to protect this read access here with the same mutex as well!
1521 MutexLocker mu(SignatureHandlerLibrary_lock);
1522 if (_handlers != nullptr) {
1523 handler_index = _handlers->find(method->signature_handler());
1524 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1525 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1526 fingerprint_index = _fingerprints->find(fingerprint);
1527 }
1528 }
1529 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1530 handler_index == fingerprint_index, "sanity check");
1531 #endif // ASSERT
1532 }
1533
1534 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1535 address SignatureHandlerLibrary::_handler = nullptr;
1536 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1537 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1538 address SignatureHandlerLibrary::_buffer = nullptr;
1539
1540
1541 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1542 methodHandle m(current, method);
1543 assert(m->is_native(), "sanity check");
1544 // lookup native function entry point if it doesn't exist
1545 if (!m->has_native_function()) {
1546 NativeLookup::lookup(m, CHECK);
1547 }
1548 // make sure signature handler is installed
1549 SignatureHandlerLibrary::add(m);
1550 // The interpreter entry point checks the signature handler first,
1551 // before trying to fetch the native entry point and klass mirror.
1552 // We must set the signature handler last, so that multiple processors
1553 // preparing the same method will be sure to see non-null entry & mirror.
1554 JRT_END
1555
1556 #if defined(AMD64) || defined(ARM)
1557 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1558 assert(current == JavaThread::current(), "pre-condition");
1559 if (src_address == dest_address) {
1560 return;
1561 }
1562 ResourceMark rm;
1563 LastFrameAccessor last_frame(current);
1564 assert(last_frame.is_interpreted_frame(), "");
1565 jint bci = last_frame.bci();
1566 methodHandle mh(current, last_frame.method());
1567 Bytecode_invoke invoke(mh, bci);
1568 ArgumentSizeComputer asc(invoke.signature());
1569 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1570 Copy::conjoint_jbytes(src_address, dest_address,
1571 size_of_arguments * Interpreter::stackElementSize);
1572 JRT_END
1573 #endif
1574
1575 #if INCLUDE_JVMTI
1576 // This is a support of the JVMTI PopFrame interface.
1577 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1578 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters.
1579 // The member_name argument is a saved reference (in local#0) to the member_name.
1580 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1581 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1582 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1583 Method* method, address bcp))
1584 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1585 if (code != Bytecodes::_invokestatic) {
1586 return;
1587 }
1588 ConstantPool* cpool = method->constants();
1589 int cp_index = Bytes::get_native_u2(bcp + 1);
1590 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1591 Symbol* mname = cpool->name_ref_at(cp_index, code);
1592
1593 if (MethodHandles::has_member_arg(cname, mname)) {
1594 oop member_name_oop = cast_to_oop(member_name);
1595 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1596 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1597 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1598 }
1599 current->set_vm_result_oop(member_name_oop);
1600 } else {
1601 current->set_vm_result_oop(nullptr);
1602 }
1603 JRT_END
1604 #endif // INCLUDE_JVMTI
1605
1606 #ifndef PRODUCT
1607 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1608 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1609 // The generated code still uses call_VM because that will set up the frame pointer for
1610 // bcp and method.
1611 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1612 assert(current == JavaThread::current(), "pre-condition");
1613 LastFrameAccessor last_frame(current);
1614 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1615 methodHandle mh(current, last_frame.method());
1616 stringStream st;
1617 BytecodeTracer::trace_interpreter(mh, last_frame.get_frame().real_fp(), last_frame.bcp(), tos, tos2, &st);
1618 tty->print("%s", st.freeze());
1619 return preserve_this_value;
1620 JRT_END
1621 #endif // !PRODUCT
1622
1623 #ifdef ASSERT
1624 bool InterpreterRuntime::is_preemptable_call(address entry_point) {
1625 return entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter) ||
1626 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache) ||
1627 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::_new);
1628 }
1629
1630 void InterpreterRuntime::generate_oop_map_alot() {
1631 JavaThread* current = JavaThread::current();
1632 LastFrameAccessor last_frame(current);
1633 if (last_frame.is_interpreted_frame()) {
1634 ResourceMark rm(current);
1635 InterpreterOopMap mask;
1636 methodHandle mh(current, last_frame.method());
1637 int bci = last_frame.bci();
1638 log_info(generateoopmap)("Generating oopmap for method %s at bci %d", mh->name_and_sig_as_C_string(), bci);
1639 OopMapCache::compute_one_oop_map(mh, bci, &mask);
1640 }
1641 }
1642 #endif // ASSERT