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/vmClasses.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compilationPolicy.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/barrierSetNMethod.hpp"
34 #include "gc/shared/collectedHeap.hpp"
35 #include "interpreter/bytecodeTracer.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/interpreterRuntime.hpp"
38 #include "interpreter/linkResolver.hpp"
39 #include "interpreter/templateTable.hpp"
40 #include "jvm_io.h"
41 #include "logging/log.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/constantPool.inline.hpp"
46 #include "oops/cpCache.inline.hpp"
47 #include "oops/instanceKlass.inline.hpp"
48 #include "oops/klass.inline.hpp"
49 #include "oops/method.inline.hpp"
50 #include "oops/methodData.hpp"
51 #include "oops/objArrayKlass.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "oops/symbol.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/methodHandles.hpp"
57 #include "prims/nativeLookup.hpp"
58 #include "runtime/atomicAccess.hpp"
59 #include "runtime/continuation.hpp"
60 #include "runtime/deoptimization.hpp"
61 #include "runtime/fieldDescriptor.inline.hpp"
62 #include "runtime/frame.inline.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/icache.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jfieldIDWorkaround.hpp"
69 #include "runtime/osThread.hpp"
70 #include "runtime/perfData.inline.hpp"
71 #include "runtime/sharedRuntime.hpp"
72 #include "runtime/stackWatermarkSet.hpp"
73 #include "runtime/stubRoutines.hpp"
74 #include "runtime/synchronizer.hpp"
75 #include "services/management.hpp"
76 #include "utilities/align.hpp"
77 #include "utilities/checkedCast.hpp"
78 #include "utilities/copy.hpp"
79 #include "utilities/events.hpp"
80 #if INCLUDE_JFR
81 #include "jfr/jfr.inline.hpp"
82 #endif
83
84 // Helper class to access current interpreter state
85 class LastFrameAccessor : public StackObj {
86 frame _last_frame;
87 public:
88 LastFrameAccessor(JavaThread* current) {
89 assert(current == Thread::current(), "sanity");
90 _last_frame = current->last_frame();
91 }
92 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
93 Method* method() const { return _last_frame.interpreter_frame_method(); }
94 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
95 int bci() const { return _last_frame.interpreter_frame_bci(); }
96 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
97
98 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
99 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
100
101 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
102 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
103
104 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
105 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
106 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
107 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
108 int number_of_dimensions() const { return bcp()[3]; }
109
110 oop callee_receiver(Symbol* signature) {
111 return _last_frame.interpreter_callee_receiver(signature);
112 }
113 BasicObjectLock* monitor_begin() const {
114 return _last_frame.interpreter_frame_monitor_begin();
115 }
116 BasicObjectLock* monitor_end() const {
117 return _last_frame.interpreter_frame_monitor_end();
118 }
119 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
120 return _last_frame.next_monitor_in_interpreter_frame(current);
121 }
122
123 frame& get_frame() { return _last_frame; }
124 };
125
126 static bool is_resolved(JavaThread* current) {
127 LastFrameAccessor last_frame(current);
128 ConstantPool* constants = last_frame.method()->constants();
129 Bytecodes::Code bc = last_frame.code();
130
131 if (bc == Bytecodes::_ldc || bc == Bytecodes::_ldc_w || bc == Bytecodes::_ldc2_w ||
132 bc == Bytecodes::_fast_aldc || bc == Bytecodes::_fast_aldc_w) {
133 bool is_wide = (bc != Bytecodes::_ldc) && (bc != Bytecodes::_fast_aldc);
134 int index = (is_wide ? last_frame.get_index_u1(bc) : last_frame.get_index_u2(bc));
135 constantTag tag = constants->tag_at(index);
136 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
137 return constants->tag_at(index).is_klass();
138 } else if (bc == Bytecodes::_invokedynamic) {
139 int index = last_frame.get_index_u4(bc);
140 int indy_index = index;
141 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
142 return indy_entry->is_resolved();
143 } else if (Bytecodes::is_invoke(bc)) {
144 int index = last_frame.get_index_u2(bc);
145 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
146 return rme->is_resolved(bc);
147 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
148 if (bc == Bytecodes::_nofast_getfield) {
149 bc = Bytecodes::_getfield;
150 } else if (bc == Bytecodes::_nofast_putfield) {
151 bc = Bytecodes::_putfield;
152 }
153 int index = last_frame.get_index_u2(bc);
154 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
155 return field_entry->is_resolved(bc);
156 } else if (bc == Bytecodes::_new) {
157 int index = last_frame.get_index_u2(bc);
158 constantTag tag = constants->tag_at(index);
159 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
160 return constants->tag_at(index).is_klass();
161 }
162 return false;
163 }
164
165 static void trace_current_location(JavaThread* current) {
166 LogStreamHandle(Debug, init, interpreter) log;
167 if (current->profile_rt_calls() && log.is_enabled()) {
168 ResourceMark rm(current);
169 LastFrameAccessor last_frame(current);
170 Method* caller = last_frame.method();
171 ConstantPool* constants = caller->constants();
172 Bytecodes::Code bc = last_frame.code();
173 log.print("InterpreterRuntime: " INTPTR_FORMAT ": %s: " INTPTR_FORMAT,
174 p2i(current), Bytecodes::name(bc), p2i(caller));
175 if (caller->in_aot_cache()) {
176 log.print(" aot");
177 }
178 if (is_resolved(current)) {
179 log.print(" resolved");
180 }
181 log.print(" ");
182 caller->print_short_name(&log);
183 log.print(" @ %d:", last_frame.bci());
184 int instruction_size = last_frame.bytecode().instruction_size();
185
186 if (Bytecodes::is_invoke(bc) && bc != Bytecodes::_invokedynamic) {
187 int index = last_frame.get_index_u2(bc);
188 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
189 if (rme->is_resolved(bc)) {
190 Method* m = rme->method();
191 if (m != nullptr) {
192 log.print(" %s", m->method_holder()->init_state_name());
193 } else {
194 log.print(" null");
195 }
196 }
197 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
198 if (bc == Bytecodes::_nofast_getfield) {
199 bc = Bytecodes::_getfield;
200 } else if (bc == Bytecodes::_nofast_putfield) {
201 bc = Bytecodes::_putfield;
202 }
203 int index = last_frame.get_index_u2(bc);
204 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
205
206 if (field_entry->is_resolved(bc)) {
207 log.print(" %s", field_entry->field_holder()->init_state_name());
208 }
209 } else if (bc == Bytecodes::_new) {
210 int index = last_frame.get_index_u2(bc);
211 constantTag tag = constants->tag_at(index);
212 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
213 if (constants->tag_at(index).is_klass()) {
214 CPKlassSlot kslot = constants->klass_slot_at(index);
215 int resolved_klass_index = kslot.resolved_klass_index();
216 Klass* k = constants->resolved_klasses()->at(resolved_klass_index);
217 log.print(": %s", InstanceKlass::cast(k)->init_state_name());
218 }
219 }
220 log.print(" ");
221 caller->print_codes_on(last_frame.bci(), last_frame.bci() + instruction_size, &log, /*flags*/ 0);
222
223 LogStreamHandle(Trace, init, interpreter) log1;
224 if (log1.is_enabled()) {
225 if (bc == Bytecodes::_invokedynamic) {
226 int index = last_frame.get_index_u4(bc);
227 int indy_index = index;
228 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
229 indy_entry->print_on(&log1);
230 } else if (Bytecodes::is_invoke(bc)) {
231 int index = last_frame.get_index_u2(bc);
232 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
233 rme->print_on(&log1);
234 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
235 int index = last_frame.get_index_u2(bc);
236 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
237 field_entry->print_on(&log1);
238 }
239 }
240 }
241 }
242
243 //------------------------------------------------------------------------------------------------------------------------
244 // State accessors
245
246 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
247 LastFrameAccessor last_frame(current);
248 last_frame.set_bcp(bcp);
249 if (ProfileInterpreter) {
250 // ProfileTraps uses MDOs independently of ProfileInterpreter.
251 // That is why we must check both ProfileInterpreter and mdo != nullptr.
252 MethodData* mdo = last_frame.method()->method_data();
253 if (mdo != nullptr) {
254 NEEDS_CLEANUP;
255 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
256 }
257 }
258 }
259
260 //------------------------------------------------------------------------------------------------------------------------
261 // Constants
262
263
264 JRT_ENTRY_PROF(void, InterpreterRuntime, ldc, InterpreterRuntime::ldc(JavaThread* current, bool wide))
265 // access constant pool
266 LastFrameAccessor last_frame(current);
267 ConstantPool* pool = last_frame.method()->constants();
268 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
269 constantTag tag = pool->tag_at(cp_index);
270
271 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
272 Klass* klass = pool->klass_at(cp_index, CHECK);
273 oop java_class = klass->java_mirror();
274 current->set_vm_result_oop(java_class);
275 JRT_END
276
277 JRT_ENTRY_PROF(void, InterpreterRuntime, resolve_ldc, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
278 assert(bytecode == Bytecodes::_ldc ||
279 bytecode == Bytecodes::_ldc_w ||
280 bytecode == Bytecodes::_ldc2_w ||
281 bytecode == Bytecodes::_fast_aldc ||
282 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
283 ResourceMark rm(current);
284 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
285 bytecode == Bytecodes::_fast_aldc_w);
286 LastFrameAccessor last_frame(current);
287 methodHandle m (current, last_frame.method());
288 Bytecode_loadconstant ldc(m, last_frame.bci());
289
290 // Double-check the size. (Condy can have any type.)
291 BasicType type = ldc.result_type();
292 switch (type2size[type]) {
293 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
294 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
295 default: ShouldNotReachHere();
296 }
297
298 // Resolve the constant. This does not do unboxing.
299 // But it does replace Universe::the_null_sentinel by null.
300 oop result = ldc.resolve_constant(CHECK);
301 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
302
303 #ifdef ASSERT
304 {
305 // The bytecode wrappers aren't GC-safe so construct a new one
306 Bytecode_loadconstant ldc2(m, last_frame.bci());
307 int rindex = ldc2.cache_index();
308 if (rindex < 0)
309 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
310 if (rindex >= 0) {
311 oop coop = m->constants()->resolved_reference_at(rindex);
312 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
313 assert(roop == coop, "expected result for assembly code");
314 }
315 }
316 #endif
317 current->set_vm_result_oop(result);
318 if (!is_fast_aldc) {
319 // Tell the interpreter how to unbox the primitive.
320 guarantee(java_lang_boxing_object::is_instance(result, type), "");
321 int offset = java_lang_boxing_object::value_offset(type);
322 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
323 | (offset & ConstantPoolCache::field_index_mask));
324 current->set_vm_result_metadata((Metadata*)flags);
325 }
326 }
327 JRT_END
328
329
330 //------------------------------------------------------------------------------------------------------------------------
331 // Allocation
332
333 JRT_ENTRY_PROF(void, InterpreterRuntime, new, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
334 Klass* k = pool->klass_at(index, CHECK);
335 InstanceKlass* klass = InstanceKlass::cast(k);
336
337 // Make sure we are not instantiating an abstract klass
338 klass->check_valid_for_instantiation(true, CHECK);
339
340 // Make sure klass is initialized
341 klass->initialize_preemptable(CHECK_AND_CLEAR_PREEMPTED);
342
343 oop obj = klass->allocate_instance(CHECK);
344 current->set_vm_result_oop(obj);
345 JRT_END
346
347
348 JRT_ENTRY_PROF(void, InterpreterRuntime, newarray, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
349 oop obj = oopFactory::new_typeArray(type, size, CHECK);
350 current->set_vm_result_oop(obj);
351 JRT_END
352
353
354 JRT_ENTRY_PROF(void, InterpreterRuntime, anewarray, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
355 Klass* klass = pool->klass_at(index, CHECK);
356 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
357 current->set_vm_result_oop(obj);
358 JRT_END
359
360
361 JRT_ENTRY_PROF(void, InterpreterRuntime, multianewarray, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
362 // We may want to pass in more arguments - could make this slightly faster
363 LastFrameAccessor last_frame(current);
364 ConstantPool* constants = last_frame.method()->constants();
365 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
366 Klass* klass = constants->klass_at(i, CHECK);
367 int nof_dims = last_frame.number_of_dimensions();
368 assert(klass->is_klass(), "not a class");
369 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
370
371 // We must create an array of jints to pass to multi_allocate.
372 ResourceMark rm(current);
373 const int small_dims = 10;
374 jint dim_array[small_dims];
375 jint *dims = &dim_array[0];
376 if (nof_dims > small_dims) {
377 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
378 }
379 for (int index = 0; index < nof_dims; index++) {
380 // offset from first_size_address is addressed as local[index]
381 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
382 dims[index] = first_size_address[n];
383 }
384 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
385 current->set_vm_result_oop(obj);
386 JRT_END
387
388
389 JRT_ENTRY_PROF(void, InterpreterRuntime, register_finalizer, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
390 assert(oopDesc::is_oop(obj), "must be a valid oop");
391 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
392 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
393 JRT_END
394
395
396 // Quicken instance-of and check-cast bytecodes
397 JRT_ENTRY_PROF(void, InterpreterRuntime, quicken_io_cc, InterpreterRuntime::quicken_io_cc(JavaThread* current))
398 // Force resolving; quicken the bytecode
399 LastFrameAccessor last_frame(current);
400 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
401 ConstantPool* cpool = last_frame.method()->constants();
402 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
403 // program we might have seen an unquick'd bytecode in the interpreter but have another
404 // thread quicken the bytecode before we get here.
405 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
406 Klass* klass = cpool->klass_at(which, CHECK);
407 current->set_vm_result_metadata(klass);
408 JRT_END
409
410
411 //------------------------------------------------------------------------------------------------------------------------
412 // Exceptions
413
414 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
415 const methodHandle& trap_method, int trap_bci) {
416 if (trap_method.not_null()) {
417 MethodData* trap_mdo = trap_method->method_data();
418 if (trap_mdo == nullptr) {
419 ExceptionMark em(current);
420 JavaThread* THREAD = current; // For exception macros.
421 Method::build_profiling_method_data(trap_method, THREAD);
422 if (HAS_PENDING_EXCEPTION) {
423 // Only metaspace OOM is expected. No Java code executed.
424 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
425 "we expect only an OOM error here");
426 CLEAR_PENDING_EXCEPTION;
427 }
428 trap_mdo = trap_method->method_data();
429 // and fall through...
430 }
431 if (trap_mdo != nullptr) {
432 // Update per-method count of trap events. The interpreter
433 // is updating the MDO to simulate the effect of compiler traps.
434 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
435 }
436 }
437 }
438
439 // Assume the compiler is (or will be) interested in this event.
440 // If necessary, create an MDO to hold the information, and record it.
441 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
442 assert(ProfileTraps, "call me only if profiling");
443 LastFrameAccessor last_frame(current);
444 methodHandle trap_method(current, last_frame.method());
445 int trap_bci = trap_method->bci_from(last_frame.bcp());
446 note_trap_inner(current, reason, trap_method, trap_bci);
447 }
448
449 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
450 // get klass
451 InstanceKlass* klass = InstanceKlass::cast(k);
452 assert(klass->is_initialized(),
453 "this klass should have been initialized during VM initialization");
454 // create instance - do not call constructor since we may have no
455 // (java) stack space left (should assert constructor is empty)
456 Handle exception;
457 oop exception_oop = klass->allocate_instance(CHECK_(exception));
458 exception = Handle(THREAD, exception_oop);
459 if (StackTraceInThrowable) {
460 java_lang_Throwable::fill_in_stack_trace(exception);
461 }
462 return exception;
463 }
464
465 // Special handling for stack overflow: since we don't have any (java) stack
466 // space left we use the pre-allocated & pre-initialized StackOverflowError
467 // klass to create an stack overflow error instance. We do not call its
468 // constructor for the same reason (it is empty, anyway).
469 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_StackOverflowError,
470 InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
471 Handle exception = get_preinitialized_exception(
472 vmClasses::StackOverflowError_klass(),
473 CHECK);
474 // Increment counter for hs_err file reporting
475 AtomicAccess::inc(&Exceptions::_stack_overflow_errors);
476 // Remove the ScopedValue bindings in case we got a StackOverflowError
477 // while we were trying to manipulate ScopedValue bindings.
478 current->clear_scopedValueBindings();
479 THROW_HANDLE(exception);
480 JRT_END
481
482 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_delayed_StackOverflowError,
483 InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
484 Handle exception = get_preinitialized_exception(
485 vmClasses::StackOverflowError_klass(),
486 CHECK);
487 java_lang_Throwable::set_message(exception(),
488 Universe::delayed_stack_overflow_error_message());
489 // Increment counter for hs_err file reporting
490 AtomicAccess::inc(&Exceptions::_stack_overflow_errors);
491 // Remove the ScopedValue bindings in case we got a StackOverflowError
492 // while we were trying to manipulate ScopedValue bindings.
493 current->clear_scopedValueBindings();
494 THROW_HANDLE(exception);
495 JRT_END
496
497 JRT_ENTRY_PROF(void, InterpreterRuntime, create_exception,
498 InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
499 // lookup exception klass
500 TempNewSymbol s = SymbolTable::new_symbol(name);
501 if (ProfileTraps) {
502 if (s == vmSymbols::java_lang_ArithmeticException()) {
503 note_trap(current, Deoptimization::Reason_div0_check);
504 } else if (s == vmSymbols::java_lang_NullPointerException()) {
505 note_trap(current, Deoptimization::Reason_null_check);
506 }
507 }
508 // create exception
509 Handle exception = Exceptions::new_exception(current, s, message);
510 current->set_vm_result_oop(exception());
511 JRT_END
512
513
514 JRT_ENTRY_PROF(void, InterpreterRuntime, create_klass_exception,
515 InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
516 // Produce the error message first because note_trap can safepoint
517 ResourceMark rm(current);
518 const char* klass_name = obj->klass()->external_name();
519 // lookup exception klass
520 TempNewSymbol s = SymbolTable::new_symbol(name);
521 if (ProfileTraps) {
522 if (s == vmSymbols::java_lang_ArrayStoreException()) {
523 note_trap(current, Deoptimization::Reason_array_check);
524 } else {
525 note_trap(current, Deoptimization::Reason_class_check);
526 }
527 }
528 // create exception, with klass name as detail message
529 Handle exception = Exceptions::new_exception(current, s, klass_name);
530 current->set_vm_result_oop(exception());
531 JRT_END
532
533 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ArrayIndexOutOfBoundsException,
534 InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
535 // Produce the error message first because note_trap can safepoint
536 ResourceMark rm(current);
537 stringStream ss;
538 ss.print("Index %d out of bounds for length %d", index, a->length());
539
540 if (ProfileTraps) {
541 note_trap(current, Deoptimization::Reason_range_check);
542 }
543
544 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
545 JRT_END
546
547 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ClassCastException,
548 InterpreterRuntime::throw_ClassCastException(
549 JavaThread* current, oopDesc* obj))
550
551 // Produce the error message first because note_trap can safepoint
552 ResourceMark rm(current);
553 char* message = SharedRuntime::generate_class_cast_message(
554 current, obj->klass());
555
556 if (ProfileTraps) {
557 note_trap(current, Deoptimization::Reason_class_check);
558 }
559
560 // create exception
561 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
562 JRT_END
563
564 // exception_handler_for_exception(...) returns the continuation address,
565 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
566 // The exception oop is returned to make sure it is preserved over GC (it
567 // is only on the stack if the exception was thrown explicitly via athrow).
568 // During this operation, the expression stack contains the values for the
569 // bci where the exception happened. If the exception was propagated back
570 // from a call, the expression stack contains the values for the bci at the
571 // invoke w/o arguments (i.e., as if one were inside the call).
572 // Note that the implementation of this method assumes it's only called when an exception has actually occured
573 JRT_ENTRY_PROF(address, InterpreterRuntime, exception_handler_for_exception,
574 InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
575 // We get here after we have unwound from a callee throwing an exception
576 // into the interpreter. Any deferred stack processing is notified of
577 // the event via the StackWatermarkSet.
578 StackWatermarkSet::after_unwind(current);
579
580 LastFrameAccessor last_frame(current);
581 Handle h_exception(current, exception);
582 methodHandle h_method (current, last_frame.method());
583 constantPoolHandle h_constants(current, h_method->constants());
584 bool should_repeat;
585 int handler_bci;
586 int current_bci = last_frame.bci();
587
588 if (current->frames_to_pop_failed_realloc() > 0) {
589 // Allocation of scalar replaced object used in this frame
590 // failed. Unconditionally pop the frame.
591 current->dec_frames_to_pop_failed_realloc();
592 current->set_vm_result_oop(h_exception());
593 // If the method is synchronized we already unlocked the monitor
594 // during deoptimization so the interpreter needs to skip it when
595 // the frame is popped.
596 current->set_do_not_unlock_if_synchronized(true);
597 return Interpreter::remove_activation_entry();
598 }
599
600 // Need to do this check first since when _do_not_unlock_if_synchronized
601 // is set, we don't want to trigger any classloading which may make calls
602 // into java, or surprisingly find a matching exception handler for bci 0
603 // since at this moment the method hasn't been "officially" entered yet.
604 if (current->do_not_unlock_if_synchronized()) {
605 ResourceMark rm;
606 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
607 current->set_vm_result_oop(exception);
608 return Interpreter::remove_activation_entry();
609 }
610
611 do {
612 should_repeat = false;
613
614 // assertions
615 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
616 // Check that exception is a subclass of Throwable.
617 assert(h_exception->is_a(vmClasses::Throwable_klass()),
618 "Exception not subclass of Throwable");
619
620 // tracing
621 if (log_is_enabled(Info, exceptions)) {
622 ResourceMark rm(current);
623 stringStream tempst;
624 tempst.print("interpreter method <%s>\n"
625 " at bci %d for thread " INTPTR_FORMAT " (%s)",
626 h_method->print_value_string(), current_bci, p2i(current), current->name());
627 Exceptions::log_exception(h_exception, tempst.as_string());
628 }
629 if (log_is_enabled(Info, exceptions, stacktrace)) {
630 Exceptions::log_exception_stacktrace(h_exception, h_method, current_bci);
631 }
632
633 // Don't go paging in something which won't be used.
634 // else if (extable->length() == 0) {
635 // // disabled for now - interpreter is not using shortcut yet
636 // // (shortcut is not to call runtime if we have no exception handlers)
637 // // warning("performance bug: should not call runtime if method has no exception handlers");
638 // }
639 // for AbortVMOnException flag
640 Exceptions::debug_check_abort(h_exception);
641
642 // exception handler lookup
643 Klass* klass = h_exception->klass();
644 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
645 if (HAS_PENDING_EXCEPTION) {
646 // We threw an exception while trying to find the exception handler.
647 // Transfer the new exception to the exception handle which will
648 // be set into thread local storage, and do another lookup for an
649 // exception handler for this exception, this time starting at the
650 // BCI of the exception handler which caused the exception to be
651 // thrown (bug 4307310).
652 h_exception = Handle(THREAD, PENDING_EXCEPTION);
653 CLEAR_PENDING_EXCEPTION;
654 if (handler_bci >= 0) {
655 current_bci = handler_bci;
656 should_repeat = true;
657 }
658 }
659 } while (should_repeat == true);
660
661 #if INCLUDE_JVMCI
662 if (EnableJVMCI && h_method->method_data() != nullptr) {
663 ResourceMark rm(current);
664 MethodData* mdo = h_method->method_data();
665
666 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
667 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
668
669 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
670 if (pdata != nullptr && pdata->is_BitData()) {
671 BitData* bit_data = (BitData*) pdata;
672 bit_data->set_exception_seen();
673 }
674 }
675 #endif
676
677 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
678 // time throw or a stack unwinding throw and accordingly notify the debugger
679 if (JvmtiExport::can_post_on_exceptions()) {
680 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
681 }
682
683 address continuation = nullptr;
684 address handler_pc = nullptr;
685 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
686 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
687 // handler in this method, or (b) after a stack overflow there is not yet
688 // enough stack space available to reprotect the stack.
689 continuation = Interpreter::remove_activation_entry();
690 #if COMPILER2_OR_JVMCI
691 // Count this for compilation purposes
692 h_method->interpreter_throwout_increment(THREAD);
693 #endif
694 } else {
695 // handler in this method => change bci/bcp to handler bci/bcp and continue there
696 handler_pc = h_method->code_base() + handler_bci;
697 h_method->set_exception_handler_entered(handler_bci); // profiling
698 #ifndef ZERO
699 set_bcp_and_mdp(handler_pc, current);
700 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
701 #else
702 continuation = (address)(intptr_t) handler_bci;
703 #endif
704 }
705
706 // notify debugger of an exception catch
707 // (this is good for exceptions caught in native methods as well)
708 if (JvmtiExport::can_post_on_exceptions()) {
709 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
710 }
711
712 current->set_vm_result_oop(h_exception());
713 return continuation;
714 JRT_END
715
716
717 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_pending_exception, InterpreterRuntime::throw_pending_exception(JavaThread* current))
718 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
719 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
720 JRT_END
721
722
723 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodError, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
724 THROW(vmSymbols::java_lang_AbstractMethodError());
725 JRT_END
726
727 // This method is called from the "abstract_entry" of the interpreter.
728 // At that point, the arguments have already been removed from the stack
729 // and therefore we don't have the receiver object at our fingertips. (Though,
730 // on some platforms the receiver still resides in a register...). Thus,
731 // we have no choice but print an error message not containing the receiver
732 // type.
733 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorWithMethod,
734 InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
735 Method* missingMethod))
736 ResourceMark rm(current);
737 assert(missingMethod != nullptr, "sanity");
738 methodHandle m(current, missingMethod);
739 LinkResolver::throw_abstract_method_error(m, THREAD);
740 JRT_END
741
742 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorVerbose,
743 InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
744 Klass* recvKlass,
745 Method* missingMethod))
746 ResourceMark rm(current);
747 methodHandle mh = methodHandle(current, missingMethod);
748 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
749 JRT_END
750
751
752 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeError,
753 InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
754 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
755 JRT_END
756
757 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose,
758 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
759 Klass* recvKlass,
760 Klass* interfaceKlass))
761 ResourceMark rm(current);
762 char buf[1000];
763 buf[0] = '\0';
764 jio_snprintf(buf, sizeof(buf),
765 "Class %s does not implement the requested interface %s",
766 recvKlass ? recvKlass->external_name() : "nullptr",
767 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
768 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
769 JRT_END
770
771 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_NullPointerException,
772 InterpreterRuntime::throw_NullPointerException(JavaThread* current))
773 THROW(vmSymbols::java_lang_NullPointerException());
774 JRT_END
775
776 //------------------------------------------------------------------------------------------------------------------------
777 // Fields
778 //
779
780 PROF_ENTRY(void, InterpreterRuntime, resolve_getfield, InterpreterRuntime::resolve_getfield(JavaThread* current))
781 resolve_get_put(Bytecodes::_getfield, current);
782 PROF_END
783
784 PROF_ENTRY(void, InterpreterRuntime, resolve_putfield, InterpreterRuntime::resolve_putfield(JavaThread* current))
785 resolve_get_put(Bytecodes::_putfield, current);
786 PROF_END
787
788 PROF_ENTRY(void, InterpreterRuntime, resolve_getstatic, InterpreterRuntime::resolve_getstatic(JavaThread* current))
789 resolve_get_put(Bytecodes::_getstatic, current);
790 PROF_END
791
792 PROF_ENTRY(void, InterpreterRuntime, resolve_putstatic, InterpreterRuntime::resolve_putstatic(JavaThread* current))
793 resolve_get_put(Bytecodes::_putstatic, current);
794 PROF_END
795
796 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, TRAPS) {
797 JavaThread* current = THREAD;
798 LastFrameAccessor last_frame(current);
799 constantPoolHandle pool(current, last_frame.method()->constants());
800 methodHandle m(current, last_frame.method());
801
802 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, ClassInitMode::init_preemptable, THREAD);
803 }
804
805 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
806 methodHandle& m,
807 constantPoolHandle& pool,
808 ClassInitMode init_mode, TRAPS) {
809 fieldDescriptor info;
810 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
811 bytecode == Bytecodes::_putstatic);
812 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
813
814 {
815 JvmtiHideSingleStepping jhss(THREAD);
816 LinkResolver::resolve_field_access(info, pool, field_index, m, bytecode, init_mode, CHECK);
817 } // end JvmtiHideSingleStepping
818
819 // check if link resolution caused cpCache to be updated
820 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
821
822 // compute auxiliary field attributes
823 TosState state = as_TosState(info.field_type());
824
825 // Resolution of put instructions on final fields is delayed. That is required so that
826 // exceptions are thrown at the correct place (when the instruction is actually invoked).
827 // If we do not resolve an instruction in the current pass, leaving the put_code
828 // set to zero will cause the next put instruction to the same field to reresolve.
829
830 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
831 // to final instance fields with updates originating from a method different than <init>)
832 // is inhibited. A putfield instruction targeting an instance final field must throw
833 // an IllegalAccessError if the instruction is not in an instance
834 // initializer method <init>. If resolution were not inhibited, a putfield
835 // in an initializer method could be resolved in the initializer. Subsequent
836 // putfield instructions to the same field would then use cached information.
837 // As a result, those instructions would not pass through the VM. That is,
838 // checks in resolve_field_access() would not be executed for those instructions
839 // and the required IllegalAccessError would not be thrown.
840 //
841 // Also, we need to delay resolving getstatic and putstatic instructions until the
842 // class is initialized. This is required so that access to the static
843 // field will call the initialization function every time until the class
844 // is completely initialized ala. in 2.17.5 in JVM Specification.
845 InstanceKlass* klass = info.field_holder();
846 bool uninitialized_static = is_static && !klass->is_initialized();
847 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
848 info.has_initialized_final_update();
849 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
850
851 Bytecodes::Code get_code = (Bytecodes::Code)0;
852 Bytecodes::Code put_code = (Bytecodes::Code)0;
853 if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) {
854 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
855 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
856 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
857 }
858 }
859
860 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
861 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
862 entry->fill_in(info.field_holder(), info.offset(),
863 checked_cast<u2>(info.index()), checked_cast<u1>(state),
864 static_cast<u1>(get_code), static_cast<u1>(put_code));
865 }
866
867
868 //------------------------------------------------------------------------------------------------------------------------
869 // Synchronization
870 //
871 // The interpreter's synchronization code is factored out so that it can
872 // be shared by method invocation and synchronized blocks.
873 //%note synchronization_3
874
875 //%note monitor_1
876 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
877 #ifdef ASSERT
878 current->last_frame().interpreter_frame_verify_monitor(elem);
879 #endif
880 Handle h_obj(current, elem->obj());
881 assert(Universe::heap()->is_in_or_null(h_obj()),
882 "must be null or an object");
883 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
884 assert(Universe::heap()->is_in_or_null(elem->obj()),
885 "must be null or an object");
886 #ifdef ASSERT
887 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
888 #endif
889 JRT_END
890
891 JRT_LEAF_PROF_NO_THREAD(void, InterpreterRuntime, monitorexit, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
892 oop obj = elem->obj();
893 assert(Universe::heap()->is_in(obj), "must be an object");
894 // The object could become unlocked through a JNI call, which we have no other checks for.
895 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
896 if (obj->is_unlocked()) {
897 if (CheckJNICalls) {
898 fatal("Object has been unlocked by JNI");
899 }
900 return;
901 }
902 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
903 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
904 // again at method exit or in the case of an exception.
905 elem->set_obj(nullptr);
906 JRT_END
907
908
909 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_illegal_monitor_state_exception,
910 InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
911 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
912 JRT_END
913
914
915 JRT_ENTRY_PROF(void, InterpreterRuntime, new_illegal_monitor_state_exception,
916 InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
917 // Returns an illegal exception to install into the current thread. The
918 // pending_exception flag is cleared so normal exception handling does not
919 // trigger. Any current installed exception will be overwritten. This
920 // method will be called during an exception unwind.
921
922 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
923 Handle exception(current, current->vm_result_oop());
924 assert(exception() != nullptr, "vm result should be set");
925 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
926 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
927 current->set_vm_result_oop(exception());
928 JRT_END
929
930
931 //------------------------------------------------------------------------------------------------------------------------
932 // Invokes
933
934 JRT_ENTRY_PROF(Bytecodes::Code, InterpreterRuntime, get_original_bytecode_at, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
935 return method->orig_bytecode_at(method->bci_from(bcp));
936 JRT_END
937
938 JRT_ENTRY_PROF(void, InterpreterRuntime, set_original_bytecode_at, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
939 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
940 JRT_END
941
942 JRT_ENTRY_PROF(void, InterpreterRuntime, breakpoint, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
943 JvmtiExport::post_raw_breakpoint(current, method, bcp);
944 JRT_END
945
946 PROF_ENTRY(void, InterpreterRuntime, resolve_invokevirtual, InterpreterRuntime::resolve_invokevirtual(JavaThread* current))
947 resolve_invoke(Bytecodes::_invokevirtual, current);
948 PROF_END
949
950 PROF_ENTRY(void, InterpreterRuntime, resolve_invokespecial, InterpreterRuntime::resolve_invokespecial(JavaThread* current))
951 resolve_invoke(Bytecodes::_invokespecial, current);
952 PROF_END
953
954 PROF_ENTRY(void, InterpreterRuntime, resolve_invokestatic, InterpreterRuntime::resolve_invokestatic(JavaThread* current))
955 resolve_invoke(Bytecodes::_invokestatic, current);
956 PROF_END
957
958 PROF_ENTRY(void, InterpreterRuntime, resolve_invokeinterface, InterpreterRuntime::resolve_invokeinterface(JavaThread* current))
959 resolve_invoke(Bytecodes::_invokeinterface, current);
960 PROF_END
961
962 void InterpreterRuntime::resolve_invoke(Bytecodes::Code bytecode, TRAPS) {
963 JavaThread* current = THREAD;
964 LastFrameAccessor last_frame(current);
965 // extract receiver from the outgoing argument list if necessary
966 Handle receiver(current, nullptr);
967 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
968 bytecode == Bytecodes::_invokespecial) {
969 ResourceMark rm(current);
970 methodHandle m (current, last_frame.method());
971 Bytecode_invoke call(m, last_frame.bci());
972 Symbol* signature = call.signature();
973 receiver = Handle(current, last_frame.callee_receiver(signature));
974
975 assert(Universe::heap()->is_in_or_null(receiver()),
976 "sanity check");
977 assert(receiver.is_null() ||
978 !Universe::heap()->is_in(receiver->klass()),
979 "sanity check");
980 }
981
982 // resolve method
983 CallInfo info;
984 constantPoolHandle pool(current, last_frame.method()->constants());
985
986 methodHandle resolved_method;
987
988 int method_index = last_frame.get_index_u2(bytecode);
989 {
990 JvmtiHideSingleStepping jhss(current);
991 LinkResolver::resolve_invoke(info, receiver, pool,
992 method_index, bytecode,
993 ClassInitMode::init_preemptable, THREAD);
994
995 if (HAS_PENDING_EXCEPTION) {
996 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
997 // Preserve the original exception across the call to note_trap()
998 PreserveExceptionMark pm(current);
999 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
1000 note_trap(current, Deoptimization::Reason_null_check);
1001 }
1002 return;
1003 }
1004
1005 resolved_method = methodHandle(current, info.resolved_method());
1006 } // end JvmtiHideSingleStepping
1007
1008 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
1009 }
1010
1011 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
1012 methodHandle& resolved_method,
1013 constantPoolHandle& pool,
1014 int method_index) {
1015 // Don't allow safepoints until the method is cached.
1016 NoSafepointVerifier nsv;
1017
1018 // check if link resolution caused cpCache to be updated
1019 ConstantPoolCache* cache = pool->cache();
1020 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
1021
1022 #ifdef ASSERT
1023 if (bytecode == Bytecodes::_invokeinterface) {
1024 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
1025 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1026 // (see also CallInfo::set_interface for details)
1027 assert(info.call_kind() == CallInfo::vtable_call ||
1028 info.call_kind() == CallInfo::direct_call, "");
1029 assert(resolved_method->is_final() || info.has_vtable_index(),
1030 "should have been set already");
1031 } else if (!resolved_method->has_itable_index()) {
1032 // Resolved something like CharSequence.toString. Use vtable not itable.
1033 assert(info.call_kind() != CallInfo::itable_call, "");
1034 } else {
1035 // Setup itable entry
1036 assert(info.call_kind() == CallInfo::itable_call, "");
1037 int index = resolved_method->itable_index();
1038 assert(info.itable_index() == index, "");
1039 }
1040 } else if (bytecode == Bytecodes::_invokespecial) {
1041 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1042 } else {
1043 assert(info.call_kind() == CallInfo::direct_call ||
1044 info.call_kind() == CallInfo::vtable_call, "");
1045 }
1046 #endif
1047 // Get sender and only set cpCache entry to resolved if it is not an
1048 // interface. The receiver for invokespecial calls within interface
1049 // methods must be checked for every call.
1050 InstanceKlass* sender = pool->pool_holder();
1051
1052 switch (info.call_kind()) {
1053 case CallInfo::direct_call:
1054 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
1055 break;
1056 case CallInfo::vtable_call:
1057 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
1058 break;
1059 case CallInfo::itable_call:
1060 cache->set_itable_call(
1061 bytecode,
1062 method_index,
1063 info.resolved_klass(),
1064 resolved_method,
1065 info.itable_index());
1066 break;
1067 default: ShouldNotReachHere();
1068 }
1069 }
1070
1071 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
1072 constantPoolHandle& pool, TRAPS) {
1073 LinkInfo link_info(pool, method_index, bytecode, CHECK);
1074
1075 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1076 CallInfo call_info;
1077 switch (bytecode) {
1078 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
1079 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1080 case Bytecodes::_invokestatic: LinkResolver::cds_resolve_static_call (call_info, link_info, CHECK); break;
1081 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1082
1083 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1084 }
1085 methodHandle resolved_method(THREAD, call_info.resolved_method());
1086 guarantee(resolved_method->method_holder()->is_linked(), "");
1087 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1088 } else {
1089 // FIXME: why a shared class is not linked yet?
1090 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1091 ResourceMark rm;
1092 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1093 log_info(aot, resolve)("Not resolved: class not linked: %s %s %s",
1094 resolved_iklass->in_aot_cache() ? "in_aot_cache" : "",
1095 resolved_iklass->init_state_name(),
1096 resolved_iklass->external_name());
1097 }
1098 }
1099
1100 // First time execution: Resolve symbols, create a permanent MethodType object.
1101 PROF_ENTRY(void, InterpreterRuntime, resolve_invokehandle, InterpreterRuntime::resolve_invokehandle(JavaThread* current))
1102 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1103 LastFrameAccessor last_frame(current);
1104
1105 // resolve method
1106 CallInfo info;
1107 constantPoolHandle pool(current, last_frame.method()->constants());
1108 int method_index = last_frame.get_index_u2(bytecode);
1109 {
1110 JvmtiHideSingleStepping jhss(current);
1111 JavaThread* THREAD = current; // For exception macros.
1112 LinkResolver::resolve_invoke(info, Handle(), pool,
1113 method_index, bytecode,
1114 CHECK);
1115 } // end JvmtiHideSingleStepping
1116
1117 pool->cache()->set_method_handle(method_index, info);
1118 PROF_END
1119
1120 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1121 constantPoolHandle& pool, TRAPS) {
1122 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1123 CallInfo info;
1124 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1125
1126 pool->cache()->set_method_handle(raw_index, info);
1127 }
1128
1129 // First time execution: Resolve symbols, create a permanent CallSite object.
1130 PROF_ENTRY(void, InterpreterRuntime, resolve_invokedynamic, InterpreterRuntime::resolve_invokedynamic(JavaThread* current))
1131 LastFrameAccessor last_frame(current);
1132 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1133
1134 // resolve method
1135 CallInfo info;
1136 constantPoolHandle pool(current, last_frame.method()->constants());
1137 int index = last_frame.get_index_u4(bytecode);
1138 {
1139 JvmtiHideSingleStepping jhss(current);
1140 JavaThread* THREAD = current; // For exception macros.
1141 LinkResolver::resolve_invoke(info, Handle(), pool,
1142 index, bytecode, CHECK);
1143 } // end JvmtiHideSingleStepping
1144
1145 pool->cache()->set_dynamic_call(info, index);
1146 PROF_END
1147
1148 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1149 constantPoolHandle& pool, TRAPS) {
1150 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1151 CallInfo info;
1152 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1153 pool->cache()->set_dynamic_call(info, raw_index);
1154 }
1155
1156 // This function is the interface to the assembly code. It returns the resolved
1157 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1158 // This function will check for redefinition!
1159 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1160 trace_current_location(current);
1161
1162 switch (bytecode) {
1163 #if 0 // LEYDEN tracing - disabled after c6a88155b519a5d0b22f6009e75a0e6388601756
1164 case Bytecodes::_getstatic: resolve_getstatic(current); break;
1165 case Bytecodes::_putstatic: resolve_putstatic(current); break;
1166 case Bytecodes::_getfield: resolve_getfield(current); break;
1167 case Bytecodes::_putfield: resolve_putfield(current); break;
1168
1169 case Bytecodes::_invokevirtual: resolve_invokevirtual(current); break;
1170 case Bytecodes::_invokespecial: resolve_invokespecial(current); break;
1171 case Bytecodes::_invokestatic: resolve_invokestatic(current); break;
1172 case Bytecodes::_invokeinterface: resolve_invokeinterface(current); break;
1173 case Bytecodes::_invokehandle: resolve_invokehandle(current); break;
1174 case Bytecodes::_invokedynamic: resolve_invokedynamic(current); break;
1175 #endif
1176 case Bytecodes::_getstatic:
1177 case Bytecodes::_putstatic:
1178 case Bytecodes::_getfield:
1179 case Bytecodes::_putfield:
1180 resolve_get_put(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1181 break;
1182 case Bytecodes::_invokevirtual:
1183 case Bytecodes::_invokespecial:
1184 case Bytecodes::_invokestatic:
1185 case Bytecodes::_invokeinterface:
1186 resolve_invoke(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1187 break;
1188 case Bytecodes::_invokehandle:
1189 resolve_invokehandle(THREAD);
1190 break;
1191 case Bytecodes::_invokedynamic:
1192 resolve_invokedynamic(THREAD);
1193 break;
1194 default:
1195 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1196 break;
1197 }
1198 }
1199 JRT_END
1200
1201 //------------------------------------------------------------------------------------------------------------------------
1202 // Miscellaneous
1203
1204
1205 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1206 assert(!PreloadOnly, "Should not be using interpreter counters");
1207
1208 // Enable WXWrite: the function is called directly by interpreter.
1209 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1210
1211 // frequency_counter_overflow_inner can throw async exception.
1212 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1213 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1214 if (branch_bcp != nullptr && nm != nullptr) {
1215 // This was a successful request for an OSR nmethod. Because
1216 // frequency_counter_overflow_inner ends with a safepoint check,
1217 // nm could have been unloaded so look it up again. It's unsafe
1218 // to examine nm directly since it might have been freed and used
1219 // for something else.
1220 LastFrameAccessor last_frame(current);
1221 Method* method = last_frame.method();
1222 int bci = method->bci_from(last_frame.bcp());
1223 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1224 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1225 if (nm != nullptr) {
1226 // in case the transition passed a safepoint we need to barrier this again
1227 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1228 nm = nullptr;
1229 }
1230 }
1231 }
1232 if (nm != nullptr && current->is_interp_only_mode()) {
1233 // Normally we never get an nm if is_interp_only_mode() is true, because
1234 // policy()->event has a check for this and won't compile the method when
1235 // true. However, it's possible for is_interp_only_mode() to become true
1236 // during the compilation. We don't want to return the nm in that case
1237 // because we want to continue to execute interpreted.
1238 nm = nullptr;
1239 }
1240 #ifndef PRODUCT
1241 if (TraceOnStackReplacement) {
1242 if (nm != nullptr) {
1243 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1244 nm->print();
1245 }
1246 }
1247 #endif
1248 return nm;
1249 }
1250
1251 JRT_ENTRY_PROF(nmethod*, InterpreterRuntime, frequency_counter_overflow,
1252 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1253 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1254 // flag, in case this method triggers classloading which will call into Java.
1255 UnlockFlagSaver fs(current);
1256
1257 LastFrameAccessor last_frame(current);
1258 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1259 methodHandle method(current, last_frame.method());
1260 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1261 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1262
1263 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1264
1265 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1266 if (osr_nm != nullptr) {
1267 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1268 osr_nm = nullptr;
1269 }
1270 }
1271 return osr_nm;
1272 JRT_END
1273
1274 JRT_LEAF_PROF_NO_THREAD(jint, InterpreterRuntime, bcp_to_di, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1275 assert(ProfileInterpreter, "must be profiling interpreter");
1276 int bci = method->bci_from(cur_bcp);
1277 MethodData* mdo = method->method_data();
1278 if (mdo == nullptr) return 0;
1279 return mdo->bci_to_di(bci);
1280 JRT_END
1281
1282 #ifdef ASSERT
1283 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1284 assert(ProfileInterpreter, "must be profiling interpreter");
1285
1286 MethodData* mdo = method->method_data();
1287 assert(mdo != nullptr, "must not be null");
1288
1289 int bci = method->bci_from(bcp);
1290
1291 address mdp2 = mdo->bci_to_dp(bci);
1292 if (mdp != mdp2) {
1293 ResourceMark rm;
1294 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1295 int current_di = mdo->dp_to_di(mdp);
1296 int expected_di = mdo->dp_to_di(mdp2);
1297 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1298 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1299 int approx_bci = -1;
1300 if (current_di >= 0) {
1301 approx_bci = mdo->data_at(current_di)->bci();
1302 }
1303 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1304 mdo->print_on(tty);
1305 method->print_codes();
1306 }
1307 assert(mdp == mdp2, "wrong mdp");
1308 JRT_END
1309 #endif // ASSERT
1310
1311 JRT_ENTRY_PROF(void, InterpreterRuntime, update_mdp_for_ret, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1312 assert(!PreloadOnly, "Should not be using interpreter counters");
1313 assert(ProfileInterpreter, "must be profiling interpreter");
1314 ResourceMark rm(current);
1315 LastFrameAccessor last_frame(current);
1316 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1317 MethodData* h_mdo = last_frame.method()->method_data();
1318
1319 // Grab a lock to ensure atomic access to setting the return bci and
1320 // the displacement. This can block and GC, invalidating all naked oops.
1321 MutexLocker ml(RetData_lock);
1322
1323 // ProfileData is essentially a wrapper around a derived oop, so we
1324 // need to take the lock before making any ProfileData structures.
1325 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1326 guarantee(data != nullptr, "profile data must be valid");
1327 RetData* rdata = data->as_RetData();
1328 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1329 last_frame.set_mdp(new_mdp);
1330 JRT_END
1331
1332 JRT_ENTRY_PROF(MethodCounters*, InterpreterRuntime, build_method_counters, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1333 return Method::build_method_counters(current, m);
1334 JRT_END
1335
1336
1337 JRT_ENTRY_PROF(void, InterpreterRuntime, at_safepoint, InterpreterRuntime::at_safepoint(JavaThread* current))
1338 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1339 // stack traversal automatically takes care of preserving arguments for invoke, so
1340 // this is no longer needed.
1341
1342 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1343 // if this is called during a safepoint
1344
1345 if (JvmtiExport::should_post_single_step()) {
1346 // This function is called by the interpreter when single stepping. Such single
1347 // stepping could unwind a frame. Then, it is important that we process any frames
1348 // that we might return into.
1349 StackWatermarkSet::before_unwind(current);
1350
1351 // We are called during regular safepoints and when the VM is
1352 // single stepping. If any thread is marked for single stepping,
1353 // then we may have JVMTI work to do.
1354 LastFrameAccessor last_frame(current);
1355 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1356 }
1357 JRT_END
1358
1359 JRT_LEAF_PROF(void, InterpreterRuntime, at_unwind, InterpreterRuntime::at_unwind(JavaThread* current))
1360 assert(current == JavaThread::current(), "pre-condition");
1361 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1362 // This function is called by the interpreter when the return poll found a reason
1363 // to call the VM. The reason could be that we are returning into a not yet safe
1364 // to access frame. We handle that below.
1365 // Note that this path does not check for single stepping, because we do not want
1366 // to single step when unwinding frames for an exception being thrown. Instead,
1367 // such single stepping code will use the safepoint table, which will use the
1368 // InterpreterRuntime::at_safepoint callback.
1369 StackWatermarkSet::before_unwind(current);
1370 JRT_END
1371
1372 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_access, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1373 ResolvedFieldEntry *entry))
1374
1375 // check the access_flags for the field in the klass
1376
1377 InstanceKlass* ik = entry->field_holder();
1378 int index = entry->field_index();
1379 if (!ik->field_status(index).is_access_watched()) return;
1380
1381 bool is_static = (obj == nullptr);
1382 HandleMark hm(current);
1383
1384 Handle h_obj;
1385 if (!is_static) {
1386 // non-static field accessors have an object, but we need a handle
1387 h_obj = Handle(current, obj);
1388 }
1389 InstanceKlass* field_holder = entry->field_holder(); // HERE
1390 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1391 LastFrameAccessor last_frame(current);
1392 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1393 JRT_END
1394
1395 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_modification, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1396 ResolvedFieldEntry *entry, jvalue *value))
1397
1398 InstanceKlass* ik = entry->field_holder();
1399
1400 // check the access_flags for the field in the klass
1401 int index = entry->field_index();
1402 // bail out if field modifications are not watched
1403 if (!ik->field_status(index).is_modification_watched()) return;
1404
1405 char sig_type = '\0';
1406
1407 switch((TosState)entry->tos_state()) {
1408 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1409 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1410 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1411 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1412 case itos: sig_type = JVM_SIGNATURE_INT; break;
1413 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1414 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1415 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1416 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1417 default: ShouldNotReachHere(); return;
1418 }
1419 bool is_static = (obj == nullptr);
1420
1421 HandleMark hm(current);
1422 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1423 jvalue fvalue;
1424 #ifdef _LP64
1425 fvalue = *value;
1426 #else
1427 // Long/double values are stored unaligned and also noncontiguously with
1428 // tagged stacks. We can't just do a simple assignment even in the non-
1429 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1430 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1431 // We assume that the two halves of longs/doubles are stored in interpreter
1432 // stack slots in platform-endian order.
1433 jlong_accessor u;
1434 jint* newval = (jint*)value;
1435 u.words[0] = newval[0];
1436 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1437 fvalue.j = u.long_value;
1438 #endif // _LP64
1439
1440 Handle h_obj;
1441 if (!is_static) {
1442 // non-static field accessors have an object, but we need a handle
1443 h_obj = Handle(current, obj);
1444 }
1445
1446 LastFrameAccessor last_frame(current);
1447 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1448 fid, sig_type, &fvalue);
1449 JRT_END
1450
1451 JRT_ENTRY_PROF(void, InterpreterRuntime, post_method_entry, InterpreterRuntime::post_method_entry(JavaThread* current))
1452 LastFrameAccessor last_frame(current);
1453 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1454 JRT_END
1455
1456
1457 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1458 // before transitioning to VM, and restore it after transitioning back
1459 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1460 JRT_BLOCK_ENTRY_PROF(void, InterpreterRuntime, post_method_exit, InterpreterRuntime::post_method_exit(JavaThread* current))
1461 LastFrameAccessor last_frame(current);
1462 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1463 JRT_END
1464
1465 JRT_LEAF_PROF_NO_THREAD(int, InterpreterRuntime, interpreter_contains, InterpreterRuntime::interpreter_contains(address pc))
1466 {
1467 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1468 }
1469 JRT_END
1470
1471
1472 // Implementation of SignatureHandlerLibrary
1473
1474 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1475 // Dummy definition (else normalization method is defined in CPU
1476 // dependent code)
1477 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1478 return fingerprint;
1479 }
1480 #endif
1481
1482 address SignatureHandlerLibrary::set_handler_blob() {
1483 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1484 if (handler_blob == nullptr) {
1485 return nullptr;
1486 }
1487 address handler = handler_blob->code_begin();
1488 _handler_blob = handler_blob;
1489 _handler = handler;
1490 return handler;
1491 }
1492
1493 void SignatureHandlerLibrary::initialize() {
1494 if (_fingerprints != nullptr) {
1495 return;
1496 }
1497 if (set_handler_blob() == nullptr) {
1498 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1499 }
1500
1501 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1502 SignatureHandlerLibrary::buffer_size);
1503 _buffer = bb->code_begin();
1504
1505 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1506 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1507 }
1508
1509 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1510 address handler = _handler;
1511 int insts_size = buffer->pure_insts_size();
1512 if (handler + insts_size > _handler_blob->code_end()) {
1513 // get a new handler blob
1514 handler = set_handler_blob();
1515 }
1516 if (handler != nullptr) {
1517 memcpy(handler, buffer->insts_begin(), insts_size);
1518 pd_set_handler(handler);
1519 ICache::invalidate_range(handler, insts_size);
1520 _handler = handler + insts_size;
1521 }
1522 return handler;
1523 }
1524
1525 void SignatureHandlerLibrary::add(const methodHandle& method) {
1526 if (method->signature_handler() == nullptr) {
1527 // use slow signature handler if we can't do better
1528 int handler_index = -1;
1529 // check if we can use customized (fast) signature handler
1530 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1531 // use customized signature handler
1532 MutexLocker mu(SignatureHandlerLibrary_lock);
1533 // make sure data structure is initialized
1534 initialize();
1535 // lookup method signature's fingerprint
1536 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1537 // allow CPU dependent code to optimize the fingerprints for the fast handler
1538 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1539 handler_index = _fingerprints->find(fingerprint);
1540 // create handler if necessary
1541 if (handler_index < 0) {
1542 ResourceMark rm;
1543 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1544 CodeBuffer buffer((address)(_buffer + align_offset),
1545 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1546 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1547 // copy into code heap
1548 address handler = set_handler(&buffer);
1549 if (handler == nullptr) {
1550 // use slow signature handler (without memorizing it in the fingerprints)
1551 } else {
1552 // debugging support
1553 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1554 ttyLocker ttyl;
1555 tty->cr();
1556 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1557 _handlers->length(),
1558 (method->is_static() ? "static" : "receiver"),
1559 method->name_and_sig_as_C_string(),
1560 fingerprint,
1561 buffer.insts_size());
1562 if (buffer.insts_size() > 0) {
1563 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1564 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1565 }
1566 #ifndef PRODUCT
1567 address rh_begin = Interpreter::result_handler(method()->result_type());
1568 if (CodeCache::contains(rh_begin)) {
1569 // else it might be special platform dependent values
1570 tty->print_cr(" --- associated result handler ---");
1571 address rh_end = rh_begin;
1572 while (*(int*)rh_end != 0) {
1573 rh_end += sizeof(int);
1574 }
1575 Disassembler::decode(rh_begin, rh_end);
1576 } else {
1577 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1578 }
1579 #endif
1580 }
1581 // add handler to library
1582 _fingerprints->append(fingerprint);
1583 _handlers->append(handler);
1584 // set handler index
1585 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1586 handler_index = _fingerprints->length() - 1;
1587 }
1588 }
1589 // Set handler under SignatureHandlerLibrary_lock
1590 if (handler_index < 0) {
1591 // use generic signature handler
1592 method->set_signature_handler(Interpreter::slow_signature_handler());
1593 } else {
1594 // set handler
1595 method->set_signature_handler(_handlers->at(handler_index));
1596 }
1597 } else {
1598 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1599 // use generic signature handler
1600 method->set_signature_handler(Interpreter::slow_signature_handler());
1601 }
1602 }
1603 #ifdef ASSERT
1604 int handler_index = -1;
1605 int fingerprint_index = -2;
1606 {
1607 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1608 // in any way if accessed from multiple threads. To avoid races with another
1609 // thread which may change the arrays in the above, mutex protected block, we
1610 // have to protect this read access here with the same mutex as well!
1611 MutexLocker mu(SignatureHandlerLibrary_lock);
1612 if (_handlers != nullptr) {
1613 handler_index = _handlers->find(method->signature_handler());
1614 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1615 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1616 fingerprint_index = _fingerprints->find(fingerprint);
1617 }
1618 }
1619 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1620 handler_index == fingerprint_index, "sanity check");
1621 #endif // ASSERT
1622 }
1623
1624 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1625 address SignatureHandlerLibrary::_handler = nullptr;
1626 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1627 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1628 address SignatureHandlerLibrary::_buffer = nullptr;
1629
1630
1631 JRT_ENTRY_PROF(void, InterpreterRuntime, prepare_native_call, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1632 methodHandle m(current, method);
1633 assert(m->is_native(), "sanity check");
1634 // lookup native function entry point if it doesn't exist
1635 if (!m->has_native_function()) {
1636 NativeLookup::lookup(m, CHECK);
1637 }
1638 // make sure signature handler is installed
1639 SignatureHandlerLibrary::add(m);
1640 // The interpreter entry point checks the signature handler first,
1641 // before trying to fetch the native entry point and klass mirror.
1642 // We must set the signature handler last, so that multiple processors
1643 // preparing the same method will be sure to see non-null entry & mirror.
1644 JRT_END
1645
1646 #if defined(AMD64) || defined(ARM)
1647 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1648 assert(current == JavaThread::current(), "pre-condition");
1649 if (src_address == dest_address) {
1650 return;
1651 }
1652 ResourceMark rm;
1653 LastFrameAccessor last_frame(current);
1654 assert(last_frame.is_interpreted_frame(), "");
1655 jint bci = last_frame.bci();
1656 methodHandle mh(current, last_frame.method());
1657 Bytecode_invoke invoke(mh, bci);
1658 ArgumentSizeComputer asc(invoke.signature());
1659 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1660 Copy::conjoint_jbytes(src_address, dest_address,
1661 size_of_arguments * Interpreter::stackElementSize);
1662 JRT_END
1663 #endif
1664
1665 #if INCLUDE_JVMTI
1666 // This is a support of the JVMTI PopFrame interface.
1667 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1668 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters.
1669 // The member_name argument is a saved reference (in local#0) to the member_name.
1670 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1671 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1672 JRT_ENTRY_PROF(void, InterpreterRuntime, member_name_arg_or_null,
1673 InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1674 Method* method, address bcp))
1675 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1676 if (code != Bytecodes::_invokestatic) {
1677 return;
1678 }
1679 ConstantPool* cpool = method->constants();
1680 int cp_index = Bytes::get_native_u2(bcp + 1);
1681 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1682 Symbol* mname = cpool->name_ref_at(cp_index, code);
1683
1684 if (MethodHandles::has_member_arg(cname, mname)) {
1685 oop member_name_oop = cast_to_oop(member_name);
1686 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1687 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1688 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1689 }
1690 current->set_vm_result_oop(member_name_oop);
1691 } else {
1692 current->set_vm_result_oop(nullptr);
1693 }
1694 JRT_END
1695 #endif // INCLUDE_JVMTI
1696
1697 #ifndef PRODUCT
1698 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1699 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1700 // The generated code still uses call_VM because that will set up the frame pointer for
1701 // bcp and method.
1702 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1703 assert(current == JavaThread::current(), "pre-condition");
1704 LastFrameAccessor last_frame(current);
1705 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1706 methodHandle mh(current, last_frame.method());
1707 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1708 return preserve_this_value;
1709 JRT_END
1710 #endif // !PRODUCT
1711
1712 #ifdef ASSERT
1713 bool InterpreterRuntime::is_preemptable_call(address entry_point) {
1714 return entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter) ||
1715 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache) ||
1716 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::_new);
1717 }
1718 #endif // ASSERT
1719
1720 #define DO_COUNTERS(macro) \
1721 macro(InterpreterRuntime, ldc) \
1722 macro(InterpreterRuntime, resolve_ldc) \
1723 macro(InterpreterRuntime, new) \
1724 macro(InterpreterRuntime, newarray) \
1725 macro(InterpreterRuntime, anewarray) \
1726 macro(InterpreterRuntime, multianewarray) \
1727 macro(InterpreterRuntime, register_finalizer) \
1728 macro(InterpreterRuntime, quicken_io_cc) \
1729 macro(InterpreterRuntime, throw_StackOverflowError) \
1730 macro(InterpreterRuntime, throw_delayed_StackOverflowError) \
1731 macro(InterpreterRuntime, create_exception) \
1732 macro(InterpreterRuntime, create_klass_exception) \
1733 macro(InterpreterRuntime, throw_ArrayIndexOutOfBoundsException) \
1734 macro(InterpreterRuntime, throw_ClassCastException) \
1735 macro(InterpreterRuntime, exception_handler_for_exception) \
1736 macro(InterpreterRuntime, throw_pending_exception) \
1737 macro(InterpreterRuntime, throw_AbstractMethodError) \
1738 macro(InterpreterRuntime, throw_AbstractMethodErrorWithMethod) \
1739 macro(InterpreterRuntime, throw_AbstractMethodErrorVerbose) \
1740 macro(InterpreterRuntime, throw_IncompatibleClassChangeError) \
1741 macro(InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose) \
1742 macro(InterpreterRuntime, throw_NullPointerException) \
1743 macro(InterpreterRuntime, monitorenter) \
1744 macro(InterpreterRuntime, monitorexit) \
1745 macro(InterpreterRuntime, throw_illegal_monitor_state_exception) \
1746 macro(InterpreterRuntime, new_illegal_monitor_state_exception) \
1747 macro(InterpreterRuntime, get_original_bytecode_at) \
1748 macro(InterpreterRuntime, set_original_bytecode_at) \
1749 macro(InterpreterRuntime, breakpoint) \
1750 macro(InterpreterRuntime, resolve_getfield) \
1751 macro(InterpreterRuntime, resolve_putfield) \
1752 macro(InterpreterRuntime, resolve_getstatic) \
1753 macro(InterpreterRuntime, resolve_putstatic) \
1754 macro(InterpreterRuntime, resolve_invokevirtual) \
1755 macro(InterpreterRuntime, resolve_invokespecial) \
1756 macro(InterpreterRuntime, resolve_invokestatic) \
1757 macro(InterpreterRuntime, resolve_invokeinterface) \
1758 macro(InterpreterRuntime, resolve_invokehandle) \
1759 macro(InterpreterRuntime, resolve_invokedynamic) \
1760 macro(InterpreterRuntime, frequency_counter_overflow) \
1761 macro(InterpreterRuntime, bcp_to_di) \
1762 macro(InterpreterRuntime, update_mdp_for_ret) \
1763 macro(InterpreterRuntime, build_method_counters) \
1764 macro(InterpreterRuntime, at_safepoint) \
1765 macro(InterpreterRuntime, at_unwind) \
1766 macro(InterpreterRuntime, post_field_access) \
1767 macro(InterpreterRuntime, post_field_modification) \
1768 macro(InterpreterRuntime, post_method_entry) \
1769 macro(InterpreterRuntime, post_method_exit) \
1770 macro(InterpreterRuntime, interpreter_contains) \
1771 macro(InterpreterRuntime, prepare_native_call)
1772
1773 #if INCLUDE_JVMTI
1774 #define DO_JVMTI_COUNTERS(macro) \
1775 macro(InterpreterRuntime, member_name_arg_or_null)
1776 #else
1777 #define DO_JVMTI_COUNTERS(macro)
1778 #endif /* INCLUDE_JVMTI */
1779
1780 #define INIT_COUNTER(sub, name) \
1781 NEWPERFTICKCOUNTERS(_perf_##sub##_##name##_timer, SUN_CI, #sub "::" #name); \
1782 NEWPERFEVENTCOUNTER(_perf_##sub##_##name##_count, SUN_CI, #sub "::" #name "_count");
1783
1784 void InterpreterRuntime::init_counters() {
1785 if (UsePerfData) {
1786 EXCEPTION_MARK;
1787
1788 DO_COUNTERS(INIT_COUNTER)
1789 DO_JVMTI_COUNTERS(INIT_COUNTER)
1790
1791 if (HAS_PENDING_EXCEPTION) {
1792 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
1793 }
1794 }
1795 }
1796 #undef INIT_COUNTER
1797
1798 #define PRINT_COUNTER(sub, name) { \
1799 jlong count = _perf_##sub##_##name##_count->get_value(); \
1800 if (count > 0) { \
1801 st->print_cr(" %-50s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
1802 #sub "::" #name, \
1803 _perf_##sub##_##name##_timer->elapsed_counter_value_us(), \
1804 _perf_##sub##_##name##_timer->thread_counter_value_us(), \
1805 count); \
1806 }}
1807
1808 void InterpreterRuntime::print_counters_on(outputStream* st) {
1809 if (UsePerfData && ProfileRuntimeCalls) {
1810 DO_COUNTERS(PRINT_COUNTER)
1811 DO_JVMTI_COUNTERS(PRINT_COUNTER)
1812 } else {
1813 st->print_cr(" InterpreterRuntime: no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
1814 }
1815 }
1816
1817 #undef PRINT_COUNTER
1818 #undef DO_JVMTI_COUNTERS
1819 #undef DO_COUNTERS