1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "classfile/javaClasses.inline.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmClasses.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "compiler/compilationPolicy.hpp"
32 #include "compiler/compileBroker.hpp"
33 #include "compiler/disassembler.hpp"
34 #include "gc/shared/barrierSetNMethod.hpp"
35 #include "gc/shared/collectedHeap.hpp"
36 #include "interpreter/bytecodeTracer.hpp"
37 #include "interpreter/interpreter.hpp"
38 #include "interpreter/interpreterRuntime.hpp"
39 #include "interpreter/linkResolver.hpp"
40 #include "interpreter/templateTable.hpp"
41 #include "jvm_io.h"
42 #include "logging/log.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.hpp"
46 #include "oops/constantPool.inline.hpp"
47 #include "oops/cpCache.inline.hpp"
48 #include "oops/flatArrayKlass.hpp"
49 #include "oops/flatArrayOop.inline.hpp"
50 #include "oops/inlineKlass.inline.hpp"
51 #include "oops/instanceKlass.inline.hpp"
52 #include "oops/klass.inline.hpp"
53 #include "oops/methodData.hpp"
54 #include "oops/method.inline.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/methodHandles.hpp"
61 #include "prims/nativeLookup.hpp"
62 #include "runtime/atomic.hpp"
63 #include "runtime/continuation.hpp"
64 #include "runtime/deoptimization.hpp"
65 #include "runtime/fieldDescriptor.inline.hpp"
66 #include "runtime/frame.inline.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/icache.hpp"
69 #include "runtime/interfaceSupport.inline.hpp"
70 #include "runtime/java.hpp"
71 #include "runtime/javaCalls.hpp"
72 #include "runtime/jfieldIDWorkaround.hpp"
73 #include "runtime/osThread.hpp"
74 #include "runtime/sharedRuntime.hpp"
75 #include "runtime/stackWatermarkSet.hpp"
76 #include "runtime/stubRoutines.hpp"
77 #include "runtime/synchronizer.inline.hpp"
78 #include "utilities/align.hpp"
79 #include "utilities/checkedCast.hpp"
80 #include "utilities/copy.hpp"
81 #include "utilities/events.hpp"
82 #include "utilities/globalDefinitions.hpp"
83 #if INCLUDE_JFR
84 #include "jfr/jfr.inline.hpp"
85 #endif
86
87 // Helper class to access current interpreter state
88 class LastFrameAccessor : public StackObj {
89 frame _last_frame;
90 public:
91 LastFrameAccessor(JavaThread* current) {
92 assert(current == Thread::current(), "sanity");
93 _last_frame = current->last_frame();
94 }
95 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
96 Method* method() const { return _last_frame.interpreter_frame_method(); }
97 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
98 int bci() const { return _last_frame.interpreter_frame_bci(); }
99 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
100
101 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
102 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
103
104 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
105 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
106
107 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
108 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
109 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
110 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
111 int number_of_dimensions() const { return bcp()[3]; }
112
113 oop callee_receiver(Symbol* signature) {
114 return _last_frame.interpreter_callee_receiver(signature);
115 }
116 BasicObjectLock* monitor_begin() const {
117 return _last_frame.interpreter_frame_monitor_begin();
118 }
119 BasicObjectLock* monitor_end() const {
120 return _last_frame.interpreter_frame_monitor_end();
121 }
122 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
123 return _last_frame.next_monitor_in_interpreter_frame(current);
124 }
125
126 frame& get_frame() { return _last_frame; }
127 };
128
129 //------------------------------------------------------------------------------------------------------------------------
130 // State accessors
131
132 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
133 LastFrameAccessor last_frame(current);
134 last_frame.set_bcp(bcp);
135 if (ProfileInterpreter) {
136 // ProfileTraps uses MDOs independently of ProfileInterpreter.
137 // That is why we must check both ProfileInterpreter and mdo != nullptr.
138 MethodData* mdo = last_frame.method()->method_data();
139 if (mdo != nullptr) {
140 NEEDS_CLEANUP;
141 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
142 }
143 }
144 }
145
146 //------------------------------------------------------------------------------------------------------------------------
147 // Constants
148
149
150 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
151 // access constant pool
152 LastFrameAccessor last_frame(current);
153 ConstantPool* pool = last_frame.method()->constants();
154 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
155 constantTag tag = pool->tag_at(cp_index);
156
157 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
158 Klass* klass = pool->klass_at(cp_index, CHECK);
159 oop java_class = klass->java_mirror();
160 current->set_vm_result_oop(java_class);
161 JRT_END
162
163 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
164 assert(bytecode == Bytecodes::_ldc ||
165 bytecode == Bytecodes::_ldc_w ||
166 bytecode == Bytecodes::_ldc2_w ||
167 bytecode == Bytecodes::_fast_aldc ||
168 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
169 ResourceMark rm(current);
170 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
171 bytecode == Bytecodes::_fast_aldc_w);
172 LastFrameAccessor last_frame(current);
173 methodHandle m (current, last_frame.method());
174 Bytecode_loadconstant ldc(m, last_frame.bci());
175
176 // Double-check the size. (Condy can have any type.)
177 BasicType type = ldc.result_type();
178 switch (type2size[type]) {
179 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
180 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
181 default: ShouldNotReachHere();
182 }
183
184 // Resolve the constant. This does not do unboxing.
185 // But it does replace Universe::the_null_sentinel by null.
186 oop result = ldc.resolve_constant(CHECK);
187 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
188
189 #ifdef ASSERT
190 {
191 // The bytecode wrappers aren't GC-safe so construct a new one
192 Bytecode_loadconstant ldc2(m, last_frame.bci());
193 int rindex = ldc2.cache_index();
194 if (rindex < 0)
195 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
196 if (rindex >= 0) {
197 oop coop = m->constants()->resolved_reference_at(rindex);
198 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
199 assert(roop == coop, "expected result for assembly code");
200 }
201 }
202 #endif
203 current->set_vm_result_oop(result);
204 if (!is_fast_aldc) {
205 // Tell the interpreter how to unbox the primitive.
206 guarantee(java_lang_boxing_object::is_instance(result, type), "");
207 int offset = java_lang_boxing_object::value_offset(type);
208 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
209 | (offset & ConstantPoolCache::field_index_mask));
210 current->set_vm_result_metadata((Metadata*)flags);
211 }
212 }
213 JRT_END
214
215
216 //------------------------------------------------------------------------------------------------------------------------
217 // Allocation
218
219 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
220 Klass* k = pool->klass_at(index, CHECK);
221 InstanceKlass* klass = InstanceKlass::cast(k);
222
223 // Make sure we are not instantiating an abstract klass
224 klass->check_valid_for_instantiation(true, CHECK);
225
226 // Make sure klass is initialized
227 klass->initialize(CHECK);
228
229 oop obj = klass->allocate_instance(CHECK);
230 current->set_vm_result_oop(obj);
231 JRT_END
232
233 JRT_ENTRY(void, InterpreterRuntime::read_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
234 assert(oopDesc::is_oop(obj), "Sanity check");
235 Handle obj_h(THREAD, obj);
236
237 InstanceKlass* holder = InstanceKlass::cast(entry->field_holder());
238 assert(entry->field_holder()->field_is_flat(entry->field_index()), "Sanity check");
239
240 InlineLayoutInfo* layout_info = holder->inline_layout_info_adr(entry->field_index());
241 InlineKlass* field_vklass = layout_info->klass();
242
243 #ifdef ASSERT
244 fieldDescriptor fd;
245 bool found = holder->find_field_from_offset(entry->field_offset(), false, &fd);
246 assert(found, "Field not found");
247 assert(fd.is_flat(), "Field must be flat");
248 #endif // ASSERT
249
250 oop res = field_vklass->read_payload_from_addr(obj_h(), entry->field_offset(), layout_info->kind(), CHECK);
251 current->set_vm_result_oop(res);
252 JRT_END
253
254 JRT_ENTRY(void, InterpreterRuntime::read_nullable_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
255 assert(oopDesc::is_oop(obj), "Sanity check");
256 assert(entry->has_null_marker(), "Otherwise should not get there");
257 Handle obj_h(THREAD, obj);
258
259 InstanceKlass* holder = entry->field_holder();
260 int field_index = entry->field_index();
261 InlineLayoutInfo* li= holder->inline_layout_info_adr(field_index);
262
263 #ifdef ASSERT
264 fieldDescriptor fd;
265 bool found = holder->find_field_from_offset(entry->field_offset(), false, &fd);
266 assert(found, "Field not found");
267 assert(fd.is_flat(), "Field must be flat");
268 #endif // ASSERT
269
270 InlineKlass* field_vklass = InlineKlass::cast(li->klass());
271 oop res = field_vklass->read_payload_from_addr(obj_h(), entry->field_offset(), li->kind(), CHECK);
272 current->set_vm_result_oop(res);
273
274 JRT_END
275
276 JRT_ENTRY(void, InterpreterRuntime::write_nullable_flat_field(JavaThread* current, oopDesc* obj, oopDesc* value, ResolvedFieldEntry* entry))
277 assert(oopDesc::is_oop(obj), "Sanity check");
278 Handle obj_h(THREAD, obj);
279 assert(value == nullptr || oopDesc::is_oop(value), "Sanity check");
280 Handle val_h(THREAD, value);
281
282 InstanceKlass* holder = entry->field_holder();
283 InlineLayoutInfo* li = holder->inline_layout_info_adr(entry->field_index());
284 InlineKlass* vk = li->klass();
285 vk->write_value_to_addr(val_h(), ((char*)(oopDesc*)obj_h()) + entry->field_offset(), li->kind(), true, CHECK);
286 JRT_END
287
288 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
289 oop obj = oopFactory::new_typeArray(type, size, CHECK);
290 current->set_vm_result_oop(obj);
291 JRT_END
292
293
294 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
295 Klass* klass = pool->klass_at(index, CHECK);
296 arrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
297 current->set_vm_result_oop(obj);
298 JRT_END
299
300 JRT_ENTRY(void, InterpreterRuntime::flat_array_load(JavaThread* current, arrayOopDesc* array, int index))
301 assert(array->is_flatArray(), "Must be");
302 flatArrayOop farray = (flatArrayOop)array;
303 oop res = farray->read_value_from_flat_array(index, CHECK);
304 current->set_vm_result_oop(res);
305 JRT_END
306
307 JRT_ENTRY(void, InterpreterRuntime::flat_array_store(JavaThread* current, oopDesc* val, arrayOopDesc* array, int index))
308 assert(array->is_flatArray(), "Must be");
309 flatArrayOop farray = (flatArrayOop)array;
310 farray->write_value_to_flat_array(val, index, CHECK);
311 JRT_END
312
313 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
314 // We may want to pass in more arguments - could make this slightly faster
315 LastFrameAccessor last_frame(current);
316 ConstantPool* constants = last_frame.method()->constants();
317 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
318 Klass* klass = constants->klass_at(i, CHECK);
319 int nof_dims = last_frame.number_of_dimensions();
320 assert(klass->is_klass(), "not a class");
321 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
322
323 // We must create an array of jints to pass to multi_allocate.
324 ResourceMark rm(current);
325 const int small_dims = 10;
326 jint dim_array[small_dims];
327 jint *dims = &dim_array[0];
328 if (nof_dims > small_dims) {
329 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
330 }
331 for (int index = 0; index < nof_dims; index++) {
332 // offset from first_size_address is addressed as local[index]
333 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
334 dims[index] = first_size_address[n];
335 }
336 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
337 current->set_vm_result_oop(obj);
338 JRT_END
339
340
341 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
342 assert(oopDesc::is_oop(obj), "must be a valid oop");
343 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
344 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
345 JRT_END
346
347 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
348 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
349
350 Handle ha(THREAD, aobj);
351 Handle hb(THREAD, bobj);
352 JavaValue result(T_BOOLEAN);
353 JavaCallArguments args;
354 args.push_oop(ha);
355 args.push_oop(hb);
356 methodHandle method(current, Universe::is_substitutable_method());
357 method->method_holder()->initialize(CHECK_false); // Ensure class ValueObjectMethods is initialized
358 JavaCalls::call(&result, method, &args, THREAD);
359 if (HAS_PENDING_EXCEPTION) {
360 // Something really bad happened because isSubstitutable() should not throw exceptions
361 // If it is an error, just let it propagate
362 // If it is an exception, wrap it into an InternalError
363 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
364 Handle e(THREAD, PENDING_EXCEPTION);
365 CLEAR_PENDING_EXCEPTION;
366 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
367 }
368 }
369 return result.get_jboolean();
370 JRT_END
371
372 // Quicken instance-of and check-cast bytecodes
373 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
374 // Force resolving; quicken the bytecode
375 LastFrameAccessor last_frame(current);
376 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
377 ConstantPool* cpool = last_frame.method()->constants();
378 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
379 // program we might have seen an unquick'd bytecode in the interpreter but have another
380 // thread quicken the bytecode before we get here.
381 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
382 Klass* klass = cpool->klass_at(which, CHECK);
383 current->set_vm_result_metadata(klass);
384 JRT_END
385
386
387 //------------------------------------------------------------------------------------------------------------------------
388 // Exceptions
389
390 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
391 const methodHandle& trap_method, int trap_bci) {
392 if (trap_method.not_null()) {
393 MethodData* trap_mdo = trap_method->method_data();
394 if (trap_mdo == nullptr) {
395 ExceptionMark em(current);
396 JavaThread* THREAD = current; // For exception macros.
397 Method::build_profiling_method_data(trap_method, THREAD);
398 if (HAS_PENDING_EXCEPTION) {
399 // Only metaspace OOM is expected. No Java code executed.
400 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
401 "we expect only an OOM error here");
402 CLEAR_PENDING_EXCEPTION;
403 }
404 trap_mdo = trap_method->method_data();
405 // and fall through...
406 }
407 if (trap_mdo != nullptr) {
408 // Update per-method count of trap events. The interpreter
409 // is updating the MDO to simulate the effect of compiler traps.
410 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
411 }
412 }
413 }
414
415 // Assume the compiler is (or will be) interested in this event.
416 // If necessary, create an MDO to hold the information, and record it.
417 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
418 assert(ProfileTraps, "call me only if profiling");
419 LastFrameAccessor last_frame(current);
420 methodHandle trap_method(current, last_frame.method());
421 int trap_bci = trap_method->bci_from(last_frame.bcp());
422 note_trap_inner(current, reason, trap_method, trap_bci);
423 }
424
425 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
426 // get klass
427 InstanceKlass* klass = InstanceKlass::cast(k);
428 assert(klass->is_initialized(),
429 "this klass should have been initialized during VM initialization");
430 // create instance - do not call constructor since we may have no
431 // (java) stack space left (should assert constructor is empty)
432 Handle exception;
433 oop exception_oop = klass->allocate_instance(CHECK_(exception));
434 exception = Handle(THREAD, exception_oop);
435 if (StackTraceInThrowable) {
436 java_lang_Throwable::fill_in_stack_trace(exception);
437 }
438 return exception;
439 }
440
441 // Special handling for stack overflow: since we don't have any (java) stack
442 // space left we use the pre-allocated & pre-initialized StackOverflowError
443 // klass to create an stack overflow error instance. We do not call its
444 // constructor for the same reason (it is empty, anyway).
445 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
446 Handle exception = get_preinitialized_exception(
447 vmClasses::StackOverflowError_klass(),
448 CHECK);
449 // Increment counter for hs_err file reporting
450 Atomic::inc(&Exceptions::_stack_overflow_errors);
451 // Remove the ScopedValue bindings in case we got a StackOverflowError
452 // while we were trying to manipulate ScopedValue bindings.
453 current->clear_scopedValueBindings();
454 THROW_HANDLE(exception);
455 JRT_END
456
457 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
458 Handle exception = get_preinitialized_exception(
459 vmClasses::StackOverflowError_klass(),
460 CHECK);
461 java_lang_Throwable::set_message(exception(),
462 Universe::delayed_stack_overflow_error_message());
463 // Increment counter for hs_err file reporting
464 Atomic::inc(&Exceptions::_stack_overflow_errors);
465 // Remove the ScopedValue bindings in case we got a StackOverflowError
466 // while we were trying to manipulate ScopedValue bindings.
467 current->clear_scopedValueBindings();
468 THROW_HANDLE(exception);
469 JRT_END
470
471 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
472 // lookup exception klass
473 TempNewSymbol s = SymbolTable::new_symbol(name);
474 if (ProfileTraps) {
475 if (s == vmSymbols::java_lang_ArithmeticException()) {
476 note_trap(current, Deoptimization::Reason_div0_check);
477 } else if (s == vmSymbols::java_lang_NullPointerException()) {
478 note_trap(current, Deoptimization::Reason_null_check);
479 }
480 }
481 // create exception
482 Handle exception = Exceptions::new_exception(current, s, message);
483 current->set_vm_result_oop(exception());
484 JRT_END
485
486
487 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
488 // Produce the error message first because note_trap can safepoint
489 ResourceMark rm(current);
490 const char* klass_name = obj->klass()->external_name();
491 // lookup exception klass
492 TempNewSymbol s = SymbolTable::new_symbol(name);
493 if (ProfileTraps) {
494 if (s == vmSymbols::java_lang_ArrayStoreException()) {
495 note_trap(current, Deoptimization::Reason_array_check);
496 } else {
497 note_trap(current, Deoptimization::Reason_class_check);
498 }
499 }
500 // create exception, with klass name as detail message
501 Handle exception = Exceptions::new_exception(current, s, klass_name);
502 current->set_vm_result_oop(exception());
503 JRT_END
504
505 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
506 // Produce the error message first because note_trap can safepoint
507 ResourceMark rm(current);
508 stringStream ss;
509 ss.print("Index %d out of bounds for length %d", index, a->length());
510
511 if (ProfileTraps) {
512 note_trap(current, Deoptimization::Reason_range_check);
513 }
514
515 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
516 JRT_END
517
518 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
519 JavaThread* current, oopDesc* obj))
520
521 // Produce the error message first because note_trap can safepoint
522 ResourceMark rm(current);
523 char* message = SharedRuntime::generate_class_cast_message(
524 current, obj->klass());
525
526 if (ProfileTraps) {
527 note_trap(current, Deoptimization::Reason_class_check);
528 }
529
530 // create exception
531 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
532 JRT_END
533
534 // exception_handler_for_exception(...) returns the continuation address,
535 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
536 // The exception oop is returned to make sure it is preserved over GC (it
537 // is only on the stack if the exception was thrown explicitly via athrow).
538 // During this operation, the expression stack contains the values for the
539 // bci where the exception happened. If the exception was propagated back
540 // from a call, the expression stack contains the values for the bci at the
541 // invoke w/o arguments (i.e., as if one were inside the call).
542 // Note that the implementation of this method assumes it's only called when an exception has actually occured
543 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
544 // We get here after we have unwound from a callee throwing an exception
545 // into the interpreter. Any deferred stack processing is notified of
546 // the event via the StackWatermarkSet.
547 StackWatermarkSet::after_unwind(current);
548
549 LastFrameAccessor last_frame(current);
550 Handle h_exception(current, exception);
551 methodHandle h_method (current, last_frame.method());
552 constantPoolHandle h_constants(current, h_method->constants());
553 bool should_repeat;
554 int handler_bci;
555 int current_bci = last_frame.bci();
556
557 if (current->frames_to_pop_failed_realloc() > 0) {
558 // Allocation of scalar replaced object used in this frame
559 // failed. Unconditionally pop the frame.
560 current->dec_frames_to_pop_failed_realloc();
561 current->set_vm_result_oop(h_exception());
562 // If the method is synchronized we already unlocked the monitor
563 // during deoptimization so the interpreter needs to skip it when
564 // the frame is popped.
565 current->set_do_not_unlock_if_synchronized(true);
566 return Interpreter::remove_activation_entry();
567 }
568
569 // Need to do this check first since when _do_not_unlock_if_synchronized
570 // is set, we don't want to trigger any classloading which may make calls
571 // into java, or surprisingly find a matching exception handler for bci 0
572 // since at this moment the method hasn't been "officially" entered yet.
573 if (current->do_not_unlock_if_synchronized()) {
574 ResourceMark rm;
575 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
576 current->set_vm_result_oop(exception);
577 return Interpreter::remove_activation_entry();
578 }
579
580 do {
581 should_repeat = false;
582
583 // assertions
584 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
585 // Check that exception is a subclass of Throwable.
586 assert(h_exception->is_a(vmClasses::Throwable_klass()),
587 "Exception not subclass of Throwable");
588
589 // tracing
590 if (log_is_enabled(Info, exceptions)) {
591 ResourceMark rm(current);
592 stringStream tempst;
593 tempst.print("interpreter method <%s>\n"
594 " at bci %d for thread " INTPTR_FORMAT " (%s)",
595 h_method->print_value_string(), current_bci, p2i(current), current->name());
596 Exceptions::log_exception(h_exception, tempst.as_string());
597 }
598 // Don't go paging in something which won't be used.
599 // else if (extable->length() == 0) {
600 // // disabled for now - interpreter is not using shortcut yet
601 // // (shortcut is not to call runtime if we have no exception handlers)
602 // // warning("performance bug: should not call runtime if method has no exception handlers");
603 // }
604 // for AbortVMOnException flag
605 Exceptions::debug_check_abort(h_exception);
606
607 // exception handler lookup
608 Klass* klass = h_exception->klass();
609 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
610 if (HAS_PENDING_EXCEPTION) {
611 // We threw an exception while trying to find the exception handler.
612 // Transfer the new exception to the exception handle which will
613 // be set into thread local storage, and do another lookup for an
614 // exception handler for this exception, this time starting at the
615 // BCI of the exception handler which caused the exception to be
616 // thrown (bug 4307310).
617 h_exception = Handle(THREAD, PENDING_EXCEPTION);
618 CLEAR_PENDING_EXCEPTION;
619 if (handler_bci >= 0) {
620 current_bci = handler_bci;
621 should_repeat = true;
622 }
623 }
624 } while (should_repeat == true);
625
626 #if INCLUDE_JVMCI
627 if (EnableJVMCI && h_method->method_data() != nullptr) {
628 ResourceMark rm(current);
629 MethodData* mdo = h_method->method_data();
630
631 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
632 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
633
634 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
635 if (pdata != nullptr && pdata->is_BitData()) {
636 BitData* bit_data = (BitData*) pdata;
637 bit_data->set_exception_seen();
638 }
639 }
640 #endif
641
642 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
643 // time throw or a stack unwinding throw and accordingly notify the debugger
644 if (JvmtiExport::can_post_on_exceptions()) {
645 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
646 }
647
648 address continuation = nullptr;
649 address handler_pc = nullptr;
650 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
651 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
652 // handler in this method, or (b) after a stack overflow there is not yet
653 // enough stack space available to reprotect the stack.
654 continuation = Interpreter::remove_activation_entry();
655 #if COMPILER2_OR_JVMCI
656 // Count this for compilation purposes
657 h_method->interpreter_throwout_increment(THREAD);
658 #endif
659 } else {
660 // handler in this method => change bci/bcp to handler bci/bcp and continue there
661 handler_pc = h_method->code_base() + handler_bci;
662 h_method->set_exception_handler_entered(handler_bci); // profiling
663 #ifndef ZERO
664 set_bcp_and_mdp(handler_pc, current);
665 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
666 #else
667 continuation = (address)(intptr_t) handler_bci;
668 #endif
669 }
670
671 // notify debugger of an exception catch
672 // (this is good for exceptions caught in native methods as well)
673 if (JvmtiExport::can_post_on_exceptions()) {
674 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
675 }
676
677 current->set_vm_result_oop(h_exception());
678 return continuation;
679 JRT_END
680
681
682 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
683 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
684 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
685 JRT_END
686
687
688 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
689 THROW(vmSymbols::java_lang_AbstractMethodError());
690 JRT_END
691
692 // This method is called from the "abstract_entry" of the interpreter.
693 // At that point, the arguments have already been removed from the stack
694 // and therefore we don't have the receiver object at our fingertips. (Though,
695 // on some platforms the receiver still resides in a register...). Thus,
696 // we have no choice but print an error message not containing the receiver
697 // type.
698 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
699 Method* missingMethod))
700 ResourceMark rm(current);
701 assert(missingMethod != nullptr, "sanity");
702 methodHandle m(current, missingMethod);
703 LinkResolver::throw_abstract_method_error(m, THREAD);
704 JRT_END
705
706 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
707 Klass* recvKlass,
708 Method* missingMethod))
709 ResourceMark rm(current);
710 methodHandle mh = methodHandle(current, missingMethod);
711 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
712 JRT_END
713
714 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current))
715 THROW(vmSymbols::java_lang_InstantiationError());
716 JRT_END
717
718
719 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
720 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
721 JRT_END
722
723 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
724 Klass* recvKlass,
725 Klass* interfaceKlass))
726 ResourceMark rm(current);
727 char buf[1000];
728 buf[0] = '\0';
729 jio_snprintf(buf, sizeof(buf),
730 "Class %s does not implement the requested interface %s",
731 recvKlass ? recvKlass->external_name() : "nullptr",
732 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
733 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
734 JRT_END
735
736 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
737 THROW(vmSymbols::java_lang_NullPointerException());
738 JRT_END
739
740 //------------------------------------------------------------------------------------------------------------------------
741 // Fields
742 //
743
744 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
745 LastFrameAccessor last_frame(current);
746 constantPoolHandle pool(current, last_frame.method()->constants());
747 methodHandle m(current, last_frame.method());
748
749 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
750 }
751
752 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
753 methodHandle& m,
754 constantPoolHandle& pool,
755 bool initialize_holder, TRAPS) {
756 fieldDescriptor info;
757 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
758 bytecode == Bytecodes::_putstatic);
759 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
760
761 {
762 JvmtiHideSingleStepping jhss(THREAD);
763 LinkResolver::resolve_field_access(info, pool, field_index,
764 m, bytecode, initialize_holder, CHECK);
765 } // end JvmtiHideSingleStepping
766
767 // check if link resolution caused cpCache to be updated
768 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
769
770 // compute auxiliary field attributes
771 TosState state = as_TosState(info.field_type());
772
773 // Resolution of put instructions on final fields is delayed. That is required so that
774 // exceptions are thrown at the correct place (when the instruction is actually invoked).
775 // If we do not resolve an instruction in the current pass, leaving the put_code
776 // set to zero will cause the next put instruction to the same field to reresolve.
777
778 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
779 // to final instance fields with updates originating from a method different than <init>)
780 // is inhibited. A putfield instruction targeting an instance final field must throw
781 // an IllegalAccessError if the instruction is not in an instance
782 // initializer method <init>. If resolution were not inhibited, a putfield
783 // in an initializer method could be resolved in the initializer. Subsequent
784 // putfield instructions to the same field would then use cached information.
785 // As a result, those instructions would not pass through the VM. That is,
786 // checks in resolve_field_access() would not be executed for those instructions
787 // and the required IllegalAccessError would not be thrown.
788 //
789 // Also, we need to delay resolving getstatic and putstatic instructions until the
790 // class is initialized. This is required so that access to the static
791 // field will call the initialization function every time until the class
792 // is completely initialized ala. in 2.17.5 in JVM Specification.
793 InstanceKlass* klass = info.field_holder();
794 bool uninitialized_static = is_static && !klass->is_initialized();
795 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
796 info.has_initialized_final_update();
797 bool strict_static_final = info.is_strict() && info.is_static() && info.is_final();
798 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
799
800 Bytecodes::Code get_code = (Bytecodes::Code)0;
801 Bytecodes::Code put_code = (Bytecodes::Code)0;
802 if (!uninitialized_static) {
803 if (is_static) {
804 get_code = Bytecodes::_getstatic;
805 } else {
806 get_code = Bytecodes::_getfield;
807 }
808 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
809 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
810 }
811 assert(!info.is_strict_static_unset(), "after initialization, no unset flags");
812 } else if (is_static && (info.is_strict_static_unset() || strict_static_final)) {
813 // During <clinit>, closely track the state of strict statics.
814 // 1. if we are reading an uninitialized strict static, throw
815 // 2. if we are writing one, clear the "unset" flag
816 //
817 // Note: If we were handling an attempted write of a null to a
818 // null-restricted strict static, we would NOT clear the "unset"
819 // flag.
820 assert(klass->is_being_initialized(), "else should have thrown");
821 assert(klass->is_reentrant_initialization(THREAD),
822 "<clinit> must be running in current thread");
823 klass->notify_strict_static_access(info.index(), is_put, CHECK);
824 }
825
826 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
827 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile(),
828 info.is_flat(), info.is_null_free_inline_type(),
829 info.has_null_marker());
830
831 entry->fill_in(info.field_holder(), info.offset(),
832 checked_cast<u2>(info.index()), checked_cast<u1>(state),
833 static_cast<u1>(get_code), static_cast<u1>(put_code));
834 }
835
836
837 //------------------------------------------------------------------------------------------------------------------------
838 // Synchronization
839 //
840 // The interpreter's synchronization code is factored out so that it can
841 // be shared by method invocation and synchronized blocks.
842 //%note synchronization_3
843
844 //%note monitor_1
845 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
846 #ifdef ASSERT
847 current->last_frame().interpreter_frame_verify_monitor(elem);
848 #endif
849 Handle h_obj(current, elem->obj());
850 assert(Universe::heap()->is_in_or_null(h_obj()),
851 "must be null or an object");
852 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
853 assert(Universe::heap()->is_in_or_null(elem->obj()),
854 "must be null or an object");
855 #ifdef ASSERT
856 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
857 #endif
858 JRT_END
859
860 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
861 oop obj = elem->obj();
862 assert(Universe::heap()->is_in(obj), "must be an object");
863 // The object could become unlocked through a JNI call, which we have no other checks for.
864 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
865 if (obj->is_unlocked()) {
866 if (CheckJNICalls) {
867 fatal("Object has been unlocked by JNI");
868 }
869 return;
870 }
871 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
872 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
873 // again at method exit or in the case of an exception.
874 elem->set_obj(nullptr);
875 JRT_END
876
877 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
878 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
879 JRT_END
880
881 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
882 // Returns an illegal exception to install into the current thread. The
883 // pending_exception flag is cleared so normal exception handling does not
884 // trigger. Any current installed exception will be overwritten. This
885 // method will be called during an exception unwind.
886
887 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
888 Handle exception(current, current->vm_result_oop());
889 assert(exception() != nullptr, "vm result should be set");
890 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
891 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
892 current->set_vm_result_oop(exception());
893 JRT_END
894
895 JRT_ENTRY(void, InterpreterRuntime::throw_identity_exception(JavaThread* current, oopDesc* obj))
896 Klass* klass = cast_to_oop(obj)->klass();
897 ResourceMark rm(THREAD);
898 const char* desc = "Cannot synchronize on an instance of value class ";
899 const char* className = klass->external_name();
900 size_t msglen = strlen(desc) + strlen(className) + 1;
901 char* message = NEW_RESOURCE_ARRAY(char, msglen);
902 if (nullptr == message) {
903 // Out of memory: can't create detailed error message
904 THROW_MSG(vmSymbols::java_lang_IdentityException(), className);
905 } else {
906 jio_snprintf(message, msglen, "%s%s", desc, className);
907 THROW_MSG(vmSymbols::java_lang_IdentityException(), message);
908 }
909 JRT_END
910
911 //------------------------------------------------------------------------------------------------------------------------
912 // Invokes
913
914 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
915 return method->orig_bytecode_at(method->bci_from(bcp));
916 JRT_END
917
918 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
919 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
920 JRT_END
921
922 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
923 JvmtiExport::post_raw_breakpoint(current, method, bcp);
924 JRT_END
925
926 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
927 LastFrameAccessor last_frame(current);
928 // extract receiver from the outgoing argument list if necessary
929 Handle receiver(current, nullptr);
930 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
931 bytecode == Bytecodes::_invokespecial) {
932 ResourceMark rm(current);
933 methodHandle m (current, last_frame.method());
934 Bytecode_invoke call(m, last_frame.bci());
935 Symbol* signature = call.signature();
936 receiver = Handle(current, last_frame.callee_receiver(signature));
937
938 assert(Universe::heap()->is_in_or_null(receiver()),
939 "sanity check");
940 assert(receiver.is_null() ||
941 !Universe::heap()->is_in(receiver->klass()),
942 "sanity check");
943 }
944
945 // resolve method
946 CallInfo info;
947 constantPoolHandle pool(current, last_frame.method()->constants());
948
949 methodHandle resolved_method;
950
951 int method_index = last_frame.get_index_u2(bytecode);
952 {
953 JvmtiHideSingleStepping jhss(current);
954 JavaThread* THREAD = current; // For exception macros.
955 LinkResolver::resolve_invoke(info, receiver, pool,
956 method_index, bytecode,
957 THREAD);
958
959 if (HAS_PENDING_EXCEPTION) {
960 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
961 // Preserve the original exception across the call to note_trap()
962 PreserveExceptionMark pm(current);
963 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
964 note_trap(current, Deoptimization::Reason_null_check);
965 }
966 return;
967 }
968
969 resolved_method = methodHandle(current, info.resolved_method());
970 } // end JvmtiHideSingleStepping
971
972 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
973 }
974
975 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
976 methodHandle& resolved_method,
977 constantPoolHandle& pool,
978 int method_index) {
979 // Don't allow safepoints until the method is cached.
980 NoSafepointVerifier nsv;
981
982 // check if link resolution caused cpCache to be updated
983 ConstantPoolCache* cache = pool->cache();
984 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
985
986 #ifdef ASSERT
987 if (bytecode == Bytecodes::_invokeinterface) {
988 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
989 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
990 // (see also CallInfo::set_interface for details)
991 assert(info.call_kind() == CallInfo::vtable_call ||
992 info.call_kind() == CallInfo::direct_call, "");
993 assert(resolved_method->is_final() || info.has_vtable_index(),
994 "should have been set already");
995 } else if (!resolved_method->has_itable_index()) {
996 // Resolved something like CharSequence.toString. Use vtable not itable.
997 assert(info.call_kind() != CallInfo::itable_call, "");
998 } else {
999 // Setup itable entry
1000 assert(info.call_kind() == CallInfo::itable_call, "");
1001 int index = resolved_method->itable_index();
1002 assert(info.itable_index() == index, "");
1003 }
1004 } else if (bytecode == Bytecodes::_invokespecial) {
1005 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1006 } else {
1007 assert(info.call_kind() == CallInfo::direct_call ||
1008 info.call_kind() == CallInfo::vtable_call, "");
1009 }
1010 #endif
1011 // Get sender and only set cpCache entry to resolved if it is not an
1012 // interface. The receiver for invokespecial calls within interface
1013 // methods must be checked for every call.
1014 InstanceKlass* sender = pool->pool_holder();
1015
1016 switch (info.call_kind()) {
1017 case CallInfo::direct_call:
1018 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
1019 break;
1020 case CallInfo::vtable_call:
1021 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
1022 break;
1023 case CallInfo::itable_call:
1024 cache->set_itable_call(
1025 bytecode,
1026 method_index,
1027 info.resolved_klass(),
1028 resolved_method,
1029 info.itable_index());
1030 break;
1031 default: ShouldNotReachHere();
1032 }
1033 }
1034
1035 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
1036 constantPoolHandle& pool, TRAPS) {
1037 LinkInfo link_info(pool, method_index, bytecode, CHECK);
1038
1039 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1040 CallInfo call_info;
1041 switch (bytecode) {
1042 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
1043 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1044 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1045
1046 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1047 }
1048 methodHandle resolved_method(THREAD, call_info.resolved_method());
1049 guarantee(resolved_method->method_holder()->is_linked(), "");
1050 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1051 } else {
1052 // FIXME: why a shared class is not linked yet?
1053 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1054 ResourceMark rm;
1055 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1056 log_info(aot, resolve)("Not resolved: class not linked: %s %s %s",
1057 resolved_iklass->is_shared() ? "is_shared" : "",
1058 resolved_iklass->init_state_name(),
1059 resolved_iklass->external_name());
1060 }
1061 }
1062
1063 // First time execution: Resolve symbols, create a permanent MethodType object.
1064 void InterpreterRuntime::resolve_invokehandle(JavaThread* current) {
1065 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1066 LastFrameAccessor last_frame(current);
1067
1068 // resolve method
1069 CallInfo info;
1070 constantPoolHandle pool(current, last_frame.method()->constants());
1071 int method_index = last_frame.get_index_u2(bytecode);
1072 {
1073 JvmtiHideSingleStepping jhss(current);
1074 JavaThread* THREAD = current; // For exception macros.
1075 LinkResolver::resolve_invoke(info, Handle(), pool,
1076 method_index, bytecode,
1077 CHECK);
1078 } // end JvmtiHideSingleStepping
1079
1080 pool->cache()->set_method_handle(method_index, info);
1081 }
1082
1083 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1084 constantPoolHandle& pool, TRAPS) {
1085 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1086 CallInfo info;
1087 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1088
1089 pool->cache()->set_method_handle(raw_index, info);
1090 }
1091
1092 // First time execution: Resolve symbols, create a permanent CallSite object.
1093 void InterpreterRuntime::resolve_invokedynamic(JavaThread* current) {
1094 LastFrameAccessor last_frame(current);
1095 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1096
1097 // resolve method
1098 CallInfo info;
1099 constantPoolHandle pool(current, last_frame.method()->constants());
1100 int index = last_frame.get_index_u4(bytecode);
1101 {
1102 JvmtiHideSingleStepping jhss(current);
1103 JavaThread* THREAD = current; // For exception macros.
1104 LinkResolver::resolve_invoke(info, Handle(), pool,
1105 index, bytecode, CHECK);
1106 } // end JvmtiHideSingleStepping
1107
1108 pool->cache()->set_dynamic_call(info, index);
1109 }
1110
1111 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1112 constantPoolHandle& pool, TRAPS) {
1113 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1114 CallInfo info;
1115 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1116 pool->cache()->set_dynamic_call(info, raw_index);
1117 }
1118
1119 // This function is the interface to the assembly code. It returns the resolved
1120 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1121 // This function will check for redefinition!
1122 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1123 switch (bytecode) {
1124 case Bytecodes::_getstatic:
1125 case Bytecodes::_putstatic:
1126 case Bytecodes::_getfield:
1127 case Bytecodes::_putfield:
1128 resolve_get_put(current, bytecode);
1129 break;
1130 case Bytecodes::_invokevirtual:
1131 case Bytecodes::_invokespecial:
1132 case Bytecodes::_invokestatic:
1133 case Bytecodes::_invokeinterface:
1134 resolve_invoke(current, bytecode);
1135 break;
1136 case Bytecodes::_invokehandle:
1137 resolve_invokehandle(current);
1138 break;
1139 case Bytecodes::_invokedynamic:
1140 resolve_invokedynamic(current);
1141 break;
1142 default:
1143 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1144 break;
1145 }
1146 }
1147 JRT_END
1148
1149 //------------------------------------------------------------------------------------------------------------------------
1150 // Miscellaneous
1151
1152
1153 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1154 // Enable WXWrite: the function is called directly by interpreter.
1155 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1156
1157 // frequency_counter_overflow_inner can throw async exception.
1158 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1159 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1160 if (branch_bcp != nullptr && nm != nullptr) {
1161 // This was a successful request for an OSR nmethod. Because
1162 // frequency_counter_overflow_inner ends with a safepoint check,
1163 // nm could have been unloaded so look it up again. It's unsafe
1164 // to examine nm directly since it might have been freed and used
1165 // for something else.
1166 LastFrameAccessor last_frame(current);
1167 Method* method = last_frame.method();
1168 int bci = method->bci_from(last_frame.bcp());
1169 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1170 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1171 if (nm != nullptr) {
1172 // in case the transition passed a safepoint we need to barrier this again
1173 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1174 nm = nullptr;
1175 }
1176 }
1177 }
1178 if (nm != nullptr && current->is_interp_only_mode()) {
1179 // Normally we never get an nm if is_interp_only_mode() is true, because
1180 // policy()->event has a check for this and won't compile the method when
1181 // true. However, it's possible for is_interp_only_mode() to become true
1182 // during the compilation. We don't want to return the nm in that case
1183 // because we want to continue to execute interpreted.
1184 nm = nullptr;
1185 }
1186 #ifndef PRODUCT
1187 if (TraceOnStackReplacement) {
1188 if (nm != nullptr) {
1189 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1190 nm->print();
1191 }
1192 }
1193 #endif
1194 return nm;
1195 }
1196
1197 JRT_ENTRY(nmethod*,
1198 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1199 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1200 // flag, in case this method triggers classloading which will call into Java.
1201 UnlockFlagSaver fs(current);
1202
1203 LastFrameAccessor last_frame(current);
1204 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1205 methodHandle method(current, last_frame.method());
1206 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1207 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1208
1209 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1210
1211 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1212 if (osr_nm != nullptr) {
1213 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1214 osr_nm = nullptr;
1215 }
1216 }
1217 return osr_nm;
1218 JRT_END
1219
1220 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1221 assert(ProfileInterpreter, "must be profiling interpreter");
1222 int bci = method->bci_from(cur_bcp);
1223 MethodData* mdo = method->method_data();
1224 if (mdo == nullptr) return 0;
1225 return mdo->bci_to_di(bci);
1226 JRT_END
1227
1228 #ifdef ASSERT
1229 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1230 assert(ProfileInterpreter, "must be profiling interpreter");
1231
1232 MethodData* mdo = method->method_data();
1233 assert(mdo != nullptr, "must not be null");
1234
1235 int bci = method->bci_from(bcp);
1236
1237 address mdp2 = mdo->bci_to_dp(bci);
1238 if (mdp != mdp2) {
1239 ResourceMark rm;
1240 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1241 int current_di = mdo->dp_to_di(mdp);
1242 int expected_di = mdo->dp_to_di(mdp2);
1243 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1244 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1245 int approx_bci = -1;
1246 if (current_di >= 0) {
1247 approx_bci = mdo->data_at(current_di)->bci();
1248 }
1249 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1250 mdo->print_on(tty);
1251 method->print_codes();
1252 }
1253 assert(mdp == mdp2, "wrong mdp");
1254 JRT_END
1255 #endif // ASSERT
1256
1257 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1258 assert(ProfileInterpreter, "must be profiling interpreter");
1259 ResourceMark rm(current);
1260 LastFrameAccessor last_frame(current);
1261 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1262 MethodData* h_mdo = last_frame.method()->method_data();
1263
1264 // Grab a lock to ensure atomic access to setting the return bci and
1265 // the displacement. This can block and GC, invalidating all naked oops.
1266 MutexLocker ml(RetData_lock);
1267
1268 // ProfileData is essentially a wrapper around a derived oop, so we
1269 // need to take the lock before making any ProfileData structures.
1270 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1271 guarantee(data != nullptr, "profile data must be valid");
1272 RetData* rdata = data->as_RetData();
1273 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1274 last_frame.set_mdp(new_mdp);
1275 JRT_END
1276
1277 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1278 return Method::build_method_counters(current, m);
1279 JRT_END
1280
1281
1282 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1283 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1284 // stack traversal automatically takes care of preserving arguments for invoke, so
1285 // this is no longer needed.
1286
1287 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1288 // if this is called during a safepoint
1289
1290 if (JvmtiExport::should_post_single_step()) {
1291 // This function is called by the interpreter when single stepping. Such single
1292 // stepping could unwind a frame. Then, it is important that we process any frames
1293 // that we might return into.
1294 StackWatermarkSet::before_unwind(current);
1295
1296 // We are called during regular safepoints and when the VM is
1297 // single stepping. If any thread is marked for single stepping,
1298 // then we may have JVMTI work to do.
1299 LastFrameAccessor last_frame(current);
1300 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1301 }
1302 JRT_END
1303
1304 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1305 assert(current == JavaThread::current(), "pre-condition");
1306 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1307 // This function is called by the interpreter when the return poll found a reason
1308 // to call the VM. The reason could be that we are returning into a not yet safe
1309 // to access frame. We handle that below.
1310 // Note that this path does not check for single stepping, because we do not want
1311 // to single step when unwinding frames for an exception being thrown. Instead,
1312 // such single stepping code will use the safepoint table, which will use the
1313 // InterpreterRuntime::at_safepoint callback.
1314 StackWatermarkSet::before_unwind(current);
1315 JRT_END
1316
1317 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1318 ResolvedFieldEntry *entry))
1319
1320 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1321 // check the access_flags for the field in the klass
1322
1323 InstanceKlass* ik = entry->field_holder();
1324 int index = entry->field_index();
1325 if (!ik->field_status(index).is_access_watched()) return;
1326
1327 bool is_static = (obj == nullptr);
1328 bool is_flat = entry->is_flat();
1329 HandleMark hm(current);
1330
1331 Handle h_obj;
1332 if (!is_static) {
1333 // non-static field accessors have an object, but we need a handle
1334 h_obj = Handle(current, obj);
1335 }
1336 InstanceKlass* field_holder = entry->field_holder(); // HERE
1337 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static, is_flat);
1338 LastFrameAccessor last_frame(current);
1339 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1340 JRT_END
1341
1342 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1343 ResolvedFieldEntry *entry, jvalue *value))
1344
1345 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1346 InstanceKlass* ik = entry->field_holder();
1347
1348 // check the access_flags for the field in the klass
1349 int index = entry->field_index();
1350 // bail out if field modifications are not watched
1351 if (!ik->field_status(index).is_modification_watched()) return;
1352
1353 char sig_type = '\0';
1354
1355 switch((TosState)entry->tos_state()) {
1356 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1357 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1358 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1359 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1360 case itos: sig_type = JVM_SIGNATURE_INT; break;
1361 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1362 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1363 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1364 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1365 default: ShouldNotReachHere(); return;
1366 }
1367
1368 bool is_static = (obj == nullptr);
1369 bool is_flat = entry->is_flat();
1370
1371 HandleMark hm(current);
1372 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static, is_flat);
1373 jvalue fvalue;
1374 #ifdef _LP64
1375 fvalue = *value;
1376 #else
1377 // Long/double values are stored unaligned and also noncontiguously with
1378 // tagged stacks. We can't just do a simple assignment even in the non-
1379 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1380 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1381 // We assume that the two halves of longs/doubles are stored in interpreter
1382 // stack slots in platform-endian order.
1383 jlong_accessor u;
1384 jint* newval = (jint*)value;
1385 u.words[0] = newval[0];
1386 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1387 fvalue.j = u.long_value;
1388 #endif // _LP64
1389
1390 Handle h_obj;
1391 if (!is_static) {
1392 // non-static field accessors have an object, but we need a handle
1393 h_obj = Handle(current, obj);
1394 }
1395
1396 LastFrameAccessor last_frame(current);
1397 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1398 fid, sig_type, &fvalue);
1399 JRT_END
1400
1401 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1402 LastFrameAccessor last_frame(current);
1403 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1404 JRT_END
1405
1406
1407 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1408 // before transitioning to VM, and restore it after transitioning back
1409 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1410 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1411 LastFrameAccessor last_frame(current);
1412 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1413 JRT_END
1414
1415 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1416 {
1417 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1418 }
1419 JRT_END
1420
1421
1422 // Implementation of SignatureHandlerLibrary
1423
1424 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1425 // Dummy definition (else normalization method is defined in CPU
1426 // dependent code)
1427 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1428 return fingerprint;
1429 }
1430 #endif
1431
1432 address SignatureHandlerLibrary::set_handler_blob() {
1433 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1434 if (handler_blob == nullptr) {
1435 return nullptr;
1436 }
1437 address handler = handler_blob->code_begin();
1438 _handler_blob = handler_blob;
1439 _handler = handler;
1440 return handler;
1441 }
1442
1443 void SignatureHandlerLibrary::initialize() {
1444 if (_fingerprints != nullptr) {
1445 return;
1446 }
1447 if (set_handler_blob() == nullptr) {
1448 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1449 }
1450
1451 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1452 SignatureHandlerLibrary::buffer_size);
1453 _buffer = bb->code_begin();
1454
1455 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1456 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1457 }
1458
1459 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1460 address handler = _handler;
1461 int insts_size = buffer->pure_insts_size();
1462 if (handler + insts_size > _handler_blob->code_end()) {
1463 // get a new handler blob
1464 handler = set_handler_blob();
1465 }
1466 if (handler != nullptr) {
1467 memcpy(handler, buffer->insts_begin(), insts_size);
1468 pd_set_handler(handler);
1469 ICache::invalidate_range(handler, insts_size);
1470 _handler = handler + insts_size;
1471 }
1472 return handler;
1473 }
1474
1475 void SignatureHandlerLibrary::add(const methodHandle& method) {
1476 if (method->signature_handler() == nullptr) {
1477 // use slow signature handler if we can't do better
1478 int handler_index = -1;
1479 // check if we can use customized (fast) signature handler
1480 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1481 // use customized signature handler
1482 MutexLocker mu(SignatureHandlerLibrary_lock);
1483 // make sure data structure is initialized
1484 initialize();
1485 // lookup method signature's fingerprint
1486 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1487 // allow CPU dependent code to optimize the fingerprints for the fast handler
1488 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1489 handler_index = _fingerprints->find(fingerprint);
1490 // create handler if necessary
1491 if (handler_index < 0) {
1492 ResourceMark rm;
1493 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1494 CodeBuffer buffer((address)(_buffer + align_offset),
1495 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1496 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1497 // copy into code heap
1498 address handler = set_handler(&buffer);
1499 if (handler == nullptr) {
1500 // use slow signature handler (without memorizing it in the fingerprints)
1501 } else {
1502 // debugging support
1503 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1504 ttyLocker ttyl;
1505 tty->cr();
1506 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1507 _handlers->length(),
1508 (method->is_static() ? "static" : "receiver"),
1509 method->name_and_sig_as_C_string(),
1510 fingerprint,
1511 buffer.insts_size());
1512 if (buffer.insts_size() > 0) {
1513 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1514 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1515 }
1516 #ifndef PRODUCT
1517 address rh_begin = Interpreter::result_handler(method()->result_type());
1518 if (CodeCache::contains(rh_begin)) {
1519 // else it might be special platform dependent values
1520 tty->print_cr(" --- associated result handler ---");
1521 address rh_end = rh_begin;
1522 while (*(int*)rh_end != 0) {
1523 rh_end += sizeof(int);
1524 }
1525 Disassembler::decode(rh_begin, rh_end);
1526 } else {
1527 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1528 }
1529 #endif
1530 }
1531 // add handler to library
1532 _fingerprints->append(fingerprint);
1533 _handlers->append(handler);
1534 // set handler index
1535 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1536 handler_index = _fingerprints->length() - 1;
1537 }
1538 }
1539 // Set handler under SignatureHandlerLibrary_lock
1540 if (handler_index < 0) {
1541 // use generic signature handler
1542 method->set_signature_handler(Interpreter::slow_signature_handler());
1543 } else {
1544 // set handler
1545 method->set_signature_handler(_handlers->at(handler_index));
1546 }
1547 } else {
1548 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1549 // use generic signature handler
1550 method->set_signature_handler(Interpreter::slow_signature_handler());
1551 }
1552 }
1553 #ifdef ASSERT
1554 int handler_index = -1;
1555 int fingerprint_index = -2;
1556 {
1557 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1558 // in any way if accessed from multiple threads. To avoid races with another
1559 // thread which may change the arrays in the above, mutex protected block, we
1560 // have to protect this read access here with the same mutex as well!
1561 MutexLocker mu(SignatureHandlerLibrary_lock);
1562 if (_handlers != nullptr) {
1563 handler_index = _handlers->find(method->signature_handler());
1564 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1565 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1566 fingerprint_index = _fingerprints->find(fingerprint);
1567 }
1568 }
1569 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1570 handler_index == fingerprint_index, "sanity check");
1571 #endif // ASSERT
1572 }
1573
1574 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1575 address SignatureHandlerLibrary::_handler = nullptr;
1576 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1577 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1578 address SignatureHandlerLibrary::_buffer = nullptr;
1579
1580
1581 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1582 methodHandle m(current, method);
1583 assert(m->is_native(), "sanity check");
1584 // lookup native function entry point if it doesn't exist
1585 if (!m->has_native_function()) {
1586 NativeLookup::lookup(m, CHECK);
1587 }
1588 // make sure signature handler is installed
1589 SignatureHandlerLibrary::add(m);
1590 // The interpreter entry point checks the signature handler first,
1591 // before trying to fetch the native entry point and klass mirror.
1592 // We must set the signature handler last, so that multiple processors
1593 // preparing the same method will be sure to see non-null entry & mirror.
1594 JRT_END
1595
1596 #if defined(IA32) || defined(AMD64) || defined(ARM)
1597 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1598 assert(current == JavaThread::current(), "pre-condition");
1599 if (src_address == dest_address) {
1600 return;
1601 }
1602 ResourceMark rm;
1603 LastFrameAccessor last_frame(current);
1604 assert(last_frame.is_interpreted_frame(), "");
1605 jint bci = last_frame.bci();
1606 methodHandle mh(current, last_frame.method());
1607 Bytecode_invoke invoke(mh, bci);
1608 ArgumentSizeComputer asc(invoke.signature());
1609 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1610 Copy::conjoint_jbytes(src_address, dest_address,
1611 size_of_arguments * Interpreter::stackElementSize);
1612 JRT_END
1613 #endif
1614
1615 #if INCLUDE_JVMTI
1616 // This is a support of the JVMTI PopFrame interface.
1617 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1618 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters.
1619 // The member_name argument is a saved reference (in local#0) to the member_name.
1620 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1621 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1622 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1623 Method* method, address bcp))
1624 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1625 if (code != Bytecodes::_invokestatic) {
1626 return;
1627 }
1628 ConstantPool* cpool = method->constants();
1629 int cp_index = Bytes::get_native_u2(bcp + 1);
1630 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1631 Symbol* mname = cpool->name_ref_at(cp_index, code);
1632
1633 if (MethodHandles::has_member_arg(cname, mname)) {
1634 oop member_name_oop = cast_to_oop(member_name);
1635 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1636 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1637 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1638 }
1639 current->set_vm_result_oop(member_name_oop);
1640 } else {
1641 current->set_vm_result_oop(nullptr);
1642 }
1643 JRT_END
1644 #endif // INCLUDE_JVMTI
1645
1646 #ifndef PRODUCT
1647 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1648 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1649 // The generated code still uses call_VM because that will set up the frame pointer for
1650 // bcp and method.
1651 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1652 assert(current == JavaThread::current(), "pre-condition");
1653 LastFrameAccessor last_frame(current);
1654 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1655 methodHandle mh(current, last_frame.method());
1656 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1657 return preserve_this_value;
1658 JRT_END
1659 #endif // !PRODUCT