1 /*
2 * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "classfile/javaClasses.inline.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/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/continuation.hpp"
59 #include "runtime/deoptimization.hpp"
60 #include "runtime/fieldDescriptor.inline.hpp"
61 #include "runtime/frame.inline.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/icache.hpp"
64 #include "runtime/interfaceSupport.inline.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/osThread.hpp"
69 #include "runtime/perfData.inline.hpp"
70 #include "runtime/sharedRuntime.hpp"
71 #include "runtime/stackWatermarkSet.hpp"
72 #include "runtime/stubRoutines.hpp"
73 #include "runtime/synchronizer.hpp"
74 #include "services/management.hpp"
75 #include "utilities/align.hpp"
76 #include "utilities/checkedCast.hpp"
77 #include "utilities/copy.hpp"
78 #include "utilities/events.hpp"
79 #include "utilities/exceptions.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 Exceptions::increment_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 Exceptions::increment_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->fill_in(info, checked_cast<u1>(state),
862 static_cast<u1>(get_code), static_cast<u1>(put_code));
863 }
864
865
866 //------------------------------------------------------------------------------------------------------------------------
867 // Synchronization
868 //
869 // The interpreter's synchronization code is factored out so that it can
870 // be shared by method invocation and synchronized blocks.
871 //%note synchronization_3
872
873 //%note monitor_1
874 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
875 #ifdef ASSERT
876 current->last_frame().interpreter_frame_verify_monitor(elem);
877 #endif
878 Handle h_obj(current, elem->obj());
879 assert(Universe::heap()->is_in_or_null(h_obj()),
880 "must be null or an object");
881 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
882 assert(Universe::heap()->is_in_or_null(elem->obj()),
883 "must be null or an object");
884 #ifdef ASSERT
885 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
886 #endif
887 JRT_END
888
889 JRT_LEAF_PROF_NO_THREAD(void, InterpreterRuntime, monitorexit, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
890 oop obj = elem->obj();
891 assert(Universe::heap()->is_in(obj), "must be an object");
892 // The object could become unlocked through a JNI call, which we have no other checks for.
893 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
894 if (obj->is_unlocked()) {
895 if (CheckJNICalls) {
896 fatal("Object has been unlocked by JNI");
897 }
898 return;
899 }
900 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
901 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
902 // again at method exit or in the case of an exception.
903 elem->set_obj(nullptr);
904 JRT_END
905
906
907 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_illegal_monitor_state_exception,
908 InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
909 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
910 JRT_END
911
912
913 JRT_ENTRY_PROF(void, InterpreterRuntime, new_illegal_monitor_state_exception,
914 InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
915 // Returns an illegal exception to install into the current thread. The
916 // pending_exception flag is cleared so normal exception handling does not
917 // trigger. Any current installed exception will be overwritten. This
918 // method will be called during an exception unwind.
919
920 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
921 Handle exception(current, current->vm_result_oop());
922 assert(exception() != nullptr, "vm result should be set");
923 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
924 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
925 current->set_vm_result_oop(exception());
926 JRT_END
927
928
929 //------------------------------------------------------------------------------------------------------------------------
930 // Invokes
931
932 JRT_ENTRY_PROF(Bytecodes::Code, InterpreterRuntime, get_original_bytecode_at, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
933 return method->orig_bytecode_at(method->bci_from(bcp));
934 JRT_END
935
936 JRT_ENTRY_PROF(void, InterpreterRuntime, set_original_bytecode_at, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
937 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
938 JRT_END
939
940 JRT_ENTRY_PROF(void, InterpreterRuntime, breakpoint, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
941 JvmtiExport::post_raw_breakpoint(current, method, bcp);
942 JRT_END
943
944 PROF_ENTRY(void, InterpreterRuntime, resolve_invokevirtual, InterpreterRuntime::resolve_invokevirtual(JavaThread* current))
945 resolve_invoke(Bytecodes::_invokevirtual, current);
946 PROF_END
947
948 PROF_ENTRY(void, InterpreterRuntime, resolve_invokespecial, InterpreterRuntime::resolve_invokespecial(JavaThread* current))
949 resolve_invoke(Bytecodes::_invokespecial, current);
950 PROF_END
951
952 PROF_ENTRY(void, InterpreterRuntime, resolve_invokestatic, InterpreterRuntime::resolve_invokestatic(JavaThread* current))
953 resolve_invoke(Bytecodes::_invokestatic, current);
954 PROF_END
955
956 PROF_ENTRY(void, InterpreterRuntime, resolve_invokeinterface, InterpreterRuntime::resolve_invokeinterface(JavaThread* current))
957 resolve_invoke(Bytecodes::_invokeinterface, current);
958 PROF_END
959
960 void InterpreterRuntime::resolve_invoke(Bytecodes::Code bytecode, TRAPS) {
961 JavaThread* current = THREAD;
962 LastFrameAccessor last_frame(current);
963 // extract receiver from the outgoing argument list if necessary
964 Handle receiver(current, nullptr);
965 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
966 bytecode == Bytecodes::_invokespecial) {
967 ResourceMark rm(current);
968 methodHandle m (current, last_frame.method());
969 Bytecode_invoke call(m, last_frame.bci());
970 Symbol* signature = call.signature();
971 receiver = Handle(current, last_frame.callee_receiver(signature));
972
973 assert(Universe::heap()->is_in_or_null(receiver()),
974 "sanity check");
975 assert(receiver.is_null() ||
976 !Universe::heap()->is_in(receiver->klass()),
977 "sanity check");
978 }
979
980 // resolve method
981 CallInfo info;
982 constantPoolHandle pool(current, last_frame.method()->constants());
983
984 methodHandle resolved_method;
985
986 int method_index = last_frame.get_index_u2(bytecode);
987 {
988 JvmtiHideSingleStepping jhss(current);
989 LinkResolver::resolve_invoke(info, receiver, pool,
990 method_index, bytecode,
991 ClassInitMode::init_preemptable, THREAD);
992
993 if (HAS_PENDING_EXCEPTION) {
994 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
995 // Preserve the original exception across the call to note_trap()
996 PreserveExceptionMark pm(current);
997 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
998 note_trap(current, Deoptimization::Reason_null_check);
999 }
1000 return;
1001 }
1002
1003 resolved_method = methodHandle(current, info.resolved_method());
1004 } // end JvmtiHideSingleStepping
1005
1006 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
1007 }
1008
1009 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
1010 methodHandle& resolved_method,
1011 constantPoolHandle& pool,
1012 int method_index) {
1013 // Don't allow safepoints until the method is cached.
1014 NoSafepointVerifier nsv;
1015
1016 // check if link resolution caused cpCache to be updated
1017 ConstantPoolCache* cache = pool->cache();
1018 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
1019
1020 #ifdef ASSERT
1021 if (bytecode == Bytecodes::_invokeinterface) {
1022 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
1023 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1024 // (see also CallInfo::set_interface for details)
1025 assert(info.call_kind() == CallInfo::vtable_call ||
1026 info.call_kind() == CallInfo::direct_call, "");
1027 assert(resolved_method->is_final() || info.has_vtable_index(),
1028 "should have been set already");
1029 } else if (!resolved_method->has_itable_index()) {
1030 // Resolved something like CharSequence.toString. Use vtable not itable.
1031 assert(info.call_kind() != CallInfo::itable_call, "");
1032 } else {
1033 // Setup itable entry
1034 assert(info.call_kind() == CallInfo::itable_call, "");
1035 int index = resolved_method->itable_index();
1036 assert(info.itable_index() == index, "");
1037 }
1038 } else if (bytecode == Bytecodes::_invokespecial) {
1039 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1040 } else {
1041 assert(info.call_kind() == CallInfo::direct_call ||
1042 info.call_kind() == CallInfo::vtable_call, "");
1043 }
1044 #endif
1045 // Get sender and only set cpCache entry to resolved if it is not an
1046 // interface. The receiver for invokespecial calls within interface
1047 // methods must be checked for every call.
1048 InstanceKlass* sender = pool->pool_holder();
1049
1050 switch (info.call_kind()) {
1051 case CallInfo::direct_call:
1052 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
1053 break;
1054 case CallInfo::vtable_call:
1055 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
1056 break;
1057 case CallInfo::itable_call:
1058 cache->set_itable_call(
1059 bytecode,
1060 method_index,
1061 info.resolved_klass(),
1062 resolved_method,
1063 info.itable_index());
1064 break;
1065 default: ShouldNotReachHere();
1066 }
1067 }
1068
1069 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
1070 constantPoolHandle& pool, TRAPS) {
1071 LinkInfo link_info(pool, method_index, bytecode, CHECK);
1072
1073 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1074 CallInfo call_info;
1075 switch (bytecode) {
1076 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
1077 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1078 case Bytecodes::_invokestatic: LinkResolver::cds_resolve_static_call (call_info, link_info, CHECK); break;
1079 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1080
1081 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1082 }
1083 methodHandle resolved_method(THREAD, call_info.resolved_method());
1084 guarantee(resolved_method->method_holder()->is_linked(), "");
1085 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1086 } else {
1087 // FIXME: why a shared class is not linked yet?
1088 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1089 ResourceMark rm;
1090 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1091 log_info(aot, resolve)("Not resolved: class not linked: %s %s %s",
1092 resolved_iklass->in_aot_cache() ? "in_aot_cache" : "",
1093 resolved_iklass->init_state_name(),
1094 resolved_iklass->external_name());
1095 }
1096 }
1097
1098 // First time execution: Resolve symbols, create a permanent MethodType object.
1099 PROF_ENTRY(void, InterpreterRuntime, resolve_invokehandle, InterpreterRuntime::resolve_invokehandle(JavaThread* current))
1100 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1101 LastFrameAccessor last_frame(current);
1102
1103 // resolve method
1104 CallInfo info;
1105 constantPoolHandle pool(current, last_frame.method()->constants());
1106 int method_index = last_frame.get_index_u2(bytecode);
1107 {
1108 JvmtiHideSingleStepping jhss(current);
1109 JavaThread* THREAD = current; // For exception macros.
1110 LinkResolver::resolve_invoke(info, Handle(), pool,
1111 method_index, bytecode,
1112 CHECK);
1113 } // end JvmtiHideSingleStepping
1114
1115 pool->cache()->set_method_handle(method_index, info);
1116 PROF_END
1117
1118 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1119 constantPoolHandle& pool, TRAPS) {
1120 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1121 CallInfo info;
1122 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1123
1124 pool->cache()->set_method_handle(raw_index, info);
1125 }
1126
1127 // First time execution: Resolve symbols, create a permanent CallSite object.
1128 PROF_ENTRY(void, InterpreterRuntime, resolve_invokedynamic, InterpreterRuntime::resolve_invokedynamic(JavaThread* current))
1129 LastFrameAccessor last_frame(current);
1130 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1131
1132 // resolve method
1133 CallInfo info;
1134 constantPoolHandle pool(current, last_frame.method()->constants());
1135 int index = last_frame.get_index_u4(bytecode);
1136 {
1137 JvmtiHideSingleStepping jhss(current);
1138 JavaThread* THREAD = current; // For exception macros.
1139 LinkResolver::resolve_invoke(info, Handle(), pool,
1140 index, bytecode, CHECK);
1141 } // end JvmtiHideSingleStepping
1142
1143 pool->cache()->set_dynamic_call(info, index);
1144 PROF_END
1145
1146 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1147 constantPoolHandle& pool, TRAPS) {
1148 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1149 CallInfo info;
1150 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1151 pool->cache()->set_dynamic_call(info, raw_index);
1152 }
1153
1154 // This function is the interface to the assembly code. It returns the resolved
1155 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1156 // This function will check for redefinition!
1157 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1158 trace_current_location(current);
1159
1160 switch (bytecode) {
1161 #if 0 // LEYDEN tracing - disabled after c6a88155b519a5d0b22f6009e75a0e6388601756
1162 case Bytecodes::_getstatic: resolve_getstatic(current); break;
1163 case Bytecodes::_putstatic: resolve_putstatic(current); break;
1164 case Bytecodes::_getfield: resolve_getfield(current); break;
1165 case Bytecodes::_putfield: resolve_putfield(current); break;
1166
1167 case Bytecodes::_invokevirtual: resolve_invokevirtual(current); break;
1168 case Bytecodes::_invokespecial: resolve_invokespecial(current); break;
1169 case Bytecodes::_invokestatic: resolve_invokestatic(current); break;
1170 case Bytecodes::_invokeinterface: resolve_invokeinterface(current); break;
1171 case Bytecodes::_invokehandle: resolve_invokehandle(current); break;
1172 case Bytecodes::_invokedynamic: resolve_invokedynamic(current); break;
1173 #endif
1174 case Bytecodes::_getstatic:
1175 case Bytecodes::_putstatic:
1176 case Bytecodes::_getfield:
1177 case Bytecodes::_putfield:
1178 resolve_get_put(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1179 break;
1180 case Bytecodes::_invokevirtual:
1181 case Bytecodes::_invokespecial:
1182 case Bytecodes::_invokestatic:
1183 case Bytecodes::_invokeinterface:
1184 resolve_invoke(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1185 break;
1186 case Bytecodes::_invokehandle:
1187 resolve_invokehandle(THREAD);
1188 break;
1189 case Bytecodes::_invokedynamic:
1190 resolve_invokedynamic(THREAD);
1191 break;
1192 default:
1193 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1194 break;
1195 }
1196 }
1197 JRT_END
1198
1199 //------------------------------------------------------------------------------------------------------------------------
1200 // Miscellaneous
1201
1202
1203 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1204 assert(!PreloadOnly, "Should not be using interpreter counters");
1205
1206 // Enable WXWrite: the function is called directly by interpreter.
1207 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1208
1209 // frequency_counter_overflow_inner can throw async exception.
1210 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1211 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1212 if (branch_bcp != nullptr && nm != nullptr) {
1213 // This was a successful request for an OSR nmethod. Because
1214 // frequency_counter_overflow_inner ends with a safepoint check,
1215 // nm could have been unloaded so look it up again. It's unsafe
1216 // to examine nm directly since it might have been freed and used
1217 // for something else.
1218 LastFrameAccessor last_frame(current);
1219 Method* method = last_frame.method();
1220 int bci = method->bci_from(last_frame.bcp());
1221 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1222 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1223 if (nm != nullptr) {
1224 // in case the transition passed a safepoint we need to barrier this again
1225 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1226 nm = nullptr;
1227 }
1228 }
1229 }
1230 if (nm != nullptr && current->is_interp_only_mode()) {
1231 // Normally we never get an nm if is_interp_only_mode() is true, because
1232 // policy()->event has a check for this and won't compile the method when
1233 // true. However, it's possible for is_interp_only_mode() to become true
1234 // during the compilation. We don't want to return the nm in that case
1235 // because we want to continue to execute interpreted.
1236 nm = nullptr;
1237 }
1238 #ifndef PRODUCT
1239 if (TraceOnStackReplacement) {
1240 if (nm != nullptr) {
1241 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1242 nm->print();
1243 }
1244 }
1245 #endif
1246 return nm;
1247 }
1248
1249 JRT_ENTRY_PROF(nmethod*, InterpreterRuntime, frequency_counter_overflow,
1250 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1251 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1252 // flag, in case this method triggers classloading which will call into Java.
1253 UnlockFlagSaver fs(current);
1254
1255 LastFrameAccessor last_frame(current);
1256 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1257 methodHandle method(current, last_frame.method());
1258 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1259 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1260
1261 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1262
1263 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1264 if (osr_nm != nullptr) {
1265 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1266 osr_nm = nullptr;
1267 }
1268 }
1269 return osr_nm;
1270 JRT_END
1271
1272 JRT_LEAF_PROF_NO_THREAD(jint, InterpreterRuntime, bcp_to_di, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1273 assert(ProfileInterpreter, "must be profiling interpreter");
1274 int bci = method->bci_from(cur_bcp);
1275 MethodData* mdo = method->method_data();
1276 if (mdo == nullptr) return 0;
1277 return mdo->bci_to_di(bci);
1278 JRT_END
1279
1280 #ifdef ASSERT
1281 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1282 assert(ProfileInterpreter, "must be profiling interpreter");
1283
1284 MethodData* mdo = method->method_data();
1285 assert(mdo != nullptr, "must not be null");
1286
1287 int bci = method->bci_from(bcp);
1288
1289 address mdp2 = mdo->bci_to_dp(bci);
1290 if (mdp != mdp2) {
1291 ResourceMark rm;
1292 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1293 int current_di = mdo->dp_to_di(mdp);
1294 int expected_di = mdo->dp_to_di(mdp2);
1295 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1296 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1297 int approx_bci = -1;
1298 if (current_di >= 0) {
1299 approx_bci = mdo->data_at(current_di)->bci();
1300 }
1301 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1302 mdo->print_on(tty);
1303 method->print_codes();
1304 }
1305 assert(mdp == mdp2, "wrong mdp");
1306 JRT_END
1307 #endif // ASSERT
1308
1309 JRT_ENTRY_PROF(void, InterpreterRuntime, update_mdp_for_ret, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1310 assert(!PreloadOnly, "Should not be using interpreter counters");
1311 assert(ProfileInterpreter, "must be profiling interpreter");
1312 ResourceMark rm(current);
1313 LastFrameAccessor last_frame(current);
1314 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1315 MethodData* h_mdo = last_frame.method()->method_data();
1316
1317 // Grab a lock to ensure atomic access to setting the return bci and
1318 // the displacement. This can block and GC, invalidating all naked oops.
1319 MutexLocker ml(RetData_lock);
1320
1321 // ProfileData is essentially a wrapper around a derived oop, so we
1322 // need to take the lock before making any ProfileData structures.
1323 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1324 guarantee(data != nullptr, "profile data must be valid");
1325 RetData* rdata = data->as_RetData();
1326 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1327 last_frame.set_mdp(new_mdp);
1328 JRT_END
1329
1330 JRT_ENTRY_PROF(MethodCounters*, InterpreterRuntime, build_method_counters, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1331 return Method::build_method_counters(current, m);
1332 JRT_END
1333
1334
1335 JRT_ENTRY_PROF(void, InterpreterRuntime, at_safepoint, InterpreterRuntime::at_safepoint(JavaThread* current))
1336 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1337 // stack traversal automatically takes care of preserving arguments for invoke, so
1338 // this is no longer needed.
1339
1340 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1341 // if this is called during a safepoint
1342
1343 if (JvmtiExport::should_post_single_step()) {
1344 // This function is called by the interpreter when single stepping. Such single
1345 // stepping could unwind a frame. Then, it is important that we process any frames
1346 // that we might return into.
1347 StackWatermarkSet::before_unwind(current);
1348
1349 // We are called during regular safepoints and when the VM is
1350 // single stepping. If any thread is marked for single stepping,
1351 // then we may have JVMTI work to do.
1352 LastFrameAccessor last_frame(current);
1353 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1354 }
1355 JRT_END
1356
1357 JRT_LEAF_PROF(void, InterpreterRuntime, at_unwind, InterpreterRuntime::at_unwind(JavaThread* current))
1358 assert(current == JavaThread::current(), "pre-condition");
1359 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1360 // This function is called by the interpreter when the return poll found a reason
1361 // to call the VM. The reason could be that we are returning into a not yet safe
1362 // to access frame. We handle that below.
1363 // Note that this path does not check for single stepping, because we do not want
1364 // to single step when unwinding frames for an exception being thrown. Instead,
1365 // such single stepping code will use the safepoint table, which will use the
1366 // InterpreterRuntime::at_safepoint callback.
1367 StackWatermarkSet::before_unwind(current);
1368 JRT_END
1369
1370 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_access, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1371 ResolvedFieldEntry* entry))
1372
1373 // check the access_flags for the field in the klass
1374 InstanceKlass* ik = entry->field_holder();
1375 int index = entry->field_index();
1376 if (!ik->field_status(index).is_access_watched()) return;
1377
1378 bool is_static = (obj == nullptr);
1379 HandleMark hm(current);
1380
1381 Handle h_obj;
1382 if (!is_static) {
1383 // non-static field accessors have an object, but we need a handle
1384 h_obj = Handle(current, obj);
1385 }
1386 InstanceKlass* field_holder = entry->field_holder(); // HERE
1387 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1388 LastFrameAccessor last_frame(current);
1389 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1390 JRT_END
1391
1392 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_modification, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1393 ResolvedFieldEntry* entry, jvalue* value))
1394
1395 // check the access_flags for the field in the klass
1396 InstanceKlass* ik = entry->field_holder();
1397 int index = entry->field_index();
1398 // bail out if field modifications are not watched
1399 if (!ik->field_status(index).is_modification_watched()) return;
1400
1401 char sig_type = '\0';
1402
1403 switch((TosState)entry->tos_state()) {
1404 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1405 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1406 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1407 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1408 case itos: sig_type = JVM_SIGNATURE_INT; break;
1409 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1410 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1411 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1412 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1413 default: ShouldNotReachHere(); return;
1414 }
1415 bool is_static = (obj == nullptr);
1416
1417 HandleMark hm(current);
1418 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1419 jvalue fvalue;
1420 #ifdef _LP64
1421 fvalue = *value;
1422 #else
1423 // Long/double values are stored unaligned and also noncontiguously with
1424 // tagged stacks. We can't just do a simple assignment even in the non-
1425 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1426 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1427 // We assume that the two halves of longs/doubles are stored in interpreter
1428 // stack slots in platform-endian order.
1429 jlong_accessor u;
1430 jint* newval = (jint*)value;
1431 u.words[0] = newval[0];
1432 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1433 fvalue.j = u.long_value;
1434 #endif // _LP64
1435
1436 Handle h_obj;
1437 if (!is_static) {
1438 // non-static field accessors have an object, but we need a handle
1439 h_obj = Handle(current, obj);
1440 }
1441
1442 LastFrameAccessor last_frame(current);
1443 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1444 fid, sig_type, &fvalue);
1445 JRT_END
1446
1447 JRT_ENTRY_PROF(void, InterpreterRuntime, post_method_entry, InterpreterRuntime::post_method_entry(JavaThread* current))
1448 LastFrameAccessor last_frame(current);
1449 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1450 JRT_END
1451
1452
1453 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1454 // before transitioning to VM, and restore it after transitioning back
1455 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1456 JRT_BLOCK_ENTRY_PROF(void, InterpreterRuntime, post_method_exit, InterpreterRuntime::post_method_exit(JavaThread* current))
1457 LastFrameAccessor last_frame(current);
1458 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1459 JRT_END
1460
1461 JRT_LEAF_PROF_NO_THREAD(int, InterpreterRuntime, interpreter_contains, InterpreterRuntime::interpreter_contains(address pc))
1462 {
1463 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1464 }
1465 JRT_END
1466
1467
1468 // Implementation of SignatureHandlerLibrary
1469
1470 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1471 // Dummy definition (else normalization method is defined in CPU
1472 // dependent code)
1473 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1474 return fingerprint;
1475 }
1476 #endif
1477
1478 address SignatureHandlerLibrary::set_handler_blob() {
1479 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1480 if (handler_blob == nullptr) {
1481 return nullptr;
1482 }
1483 address handler = handler_blob->code_begin();
1484 _handler_blob = handler_blob;
1485 _handler = handler;
1486 return handler;
1487 }
1488
1489 void SignatureHandlerLibrary::initialize() {
1490 if (_fingerprints != nullptr) {
1491 return;
1492 }
1493 if (set_handler_blob() == nullptr) {
1494 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1495 }
1496
1497 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1498 SignatureHandlerLibrary::buffer_size);
1499 _buffer = bb->code_begin();
1500
1501 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1502 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1503 }
1504
1505 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1506 address handler = _handler;
1507 int insts_size = buffer->pure_insts_size();
1508 if (handler + insts_size > _handler_blob->code_end()) {
1509 // get a new handler blob
1510 handler = set_handler_blob();
1511 }
1512 if (handler != nullptr) {
1513 memcpy(handler, buffer->insts_begin(), insts_size);
1514 pd_set_handler(handler);
1515 ICache::invalidate_range(handler, insts_size);
1516 _handler = handler + insts_size;
1517 }
1518 return handler;
1519 }
1520
1521 void SignatureHandlerLibrary::add(const methodHandle& method) {
1522 if (method->signature_handler() == nullptr) {
1523 // use slow signature handler if we can't do better
1524 int handler_index = -1;
1525 // check if we can use customized (fast) signature handler
1526 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1527 // use customized signature handler
1528 MutexLocker mu(SignatureHandlerLibrary_lock);
1529 // make sure data structure is initialized
1530 initialize();
1531 // lookup method signature's fingerprint
1532 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1533 // allow CPU dependent code to optimize the fingerprints for the fast handler
1534 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1535 handler_index = _fingerprints->find(fingerprint);
1536 // create handler if necessary
1537 if (handler_index < 0) {
1538 ResourceMark rm;
1539 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1540 CodeBuffer buffer((address)(_buffer + align_offset),
1541 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1542 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1543 // copy into code heap
1544 address handler = set_handler(&buffer);
1545 if (handler == nullptr) {
1546 // use slow signature handler (without memorizing it in the fingerprints)
1547 } else {
1548 // debugging support
1549 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1550 ttyLocker ttyl;
1551 tty->cr();
1552 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1553 _handlers->length(),
1554 (method->is_static() ? "static" : "receiver"),
1555 method->name_and_sig_as_C_string(),
1556 fingerprint,
1557 buffer.insts_size());
1558 if (buffer.insts_size() > 0) {
1559 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1560 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1561 }
1562 #ifndef PRODUCT
1563 address rh_begin = Interpreter::result_handler(method()->result_type());
1564 if (CodeCache::contains(rh_begin)) {
1565 // else it might be special platform dependent values
1566 tty->print_cr(" --- associated result handler ---");
1567 address rh_end = rh_begin;
1568 while (*(int*)rh_end != 0) {
1569 rh_end += sizeof(int);
1570 }
1571 Disassembler::decode(rh_begin, rh_end);
1572 } else {
1573 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1574 }
1575 #endif
1576 }
1577 // add handler to library
1578 _fingerprints->append(fingerprint);
1579 _handlers->append(handler);
1580 // set handler index
1581 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1582 handler_index = _fingerprints->length() - 1;
1583 }
1584 }
1585 // Set handler under SignatureHandlerLibrary_lock
1586 if (handler_index < 0) {
1587 // use generic signature handler
1588 method->set_signature_handler(Interpreter::slow_signature_handler());
1589 } else {
1590 // set handler
1591 method->set_signature_handler(_handlers->at(handler_index));
1592 }
1593 } else {
1594 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1595 // use generic signature handler
1596 method->set_signature_handler(Interpreter::slow_signature_handler());
1597 }
1598 }
1599 #ifdef ASSERT
1600 int handler_index = -1;
1601 int fingerprint_index = -2;
1602 {
1603 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1604 // in any way if accessed from multiple threads. To avoid races with another
1605 // thread which may change the arrays in the above, mutex protected block, we
1606 // have to protect this read access here with the same mutex as well!
1607 MutexLocker mu(SignatureHandlerLibrary_lock);
1608 if (_handlers != nullptr) {
1609 handler_index = _handlers->find(method->signature_handler());
1610 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1611 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1612 fingerprint_index = _fingerprints->find(fingerprint);
1613 }
1614 }
1615 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1616 handler_index == fingerprint_index, "sanity check");
1617 #endif // ASSERT
1618 }
1619
1620 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1621 address SignatureHandlerLibrary::_handler = nullptr;
1622 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1623 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1624 address SignatureHandlerLibrary::_buffer = nullptr;
1625
1626
1627 JRT_ENTRY_PROF(void, InterpreterRuntime, prepare_native_call, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1628 methodHandle m(current, method);
1629 assert(m->is_native(), "sanity check");
1630 // lookup native function entry point if it doesn't exist
1631 if (!m->has_native_function()) {
1632 NativeLookup::lookup(m, CHECK);
1633 }
1634 // make sure signature handler is installed
1635 SignatureHandlerLibrary::add(m);
1636 // The interpreter entry point checks the signature handler first,
1637 // before trying to fetch the native entry point and klass mirror.
1638 // We must set the signature handler last, so that multiple processors
1639 // preparing the same method will be sure to see non-null entry & mirror.
1640 JRT_END
1641
1642 #if defined(AMD64) || defined(ARM)
1643 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1644 assert(current == JavaThread::current(), "pre-condition");
1645 if (src_address == dest_address) {
1646 return;
1647 }
1648 ResourceMark rm;
1649 LastFrameAccessor last_frame(current);
1650 assert(last_frame.is_interpreted_frame(), "");
1651 jint bci = last_frame.bci();
1652 methodHandle mh(current, last_frame.method());
1653 Bytecode_invoke invoke(mh, bci);
1654 ArgumentSizeComputer asc(invoke.signature());
1655 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1656 Copy::conjoint_jbytes(src_address, dest_address,
1657 size_of_arguments * Interpreter::stackElementSize);
1658 JRT_END
1659 #endif
1660
1661 #if INCLUDE_JVMTI
1662 // This is a support of the JVMTI PopFrame interface.
1663 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1664 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters.
1665 // The member_name argument is a saved reference (in local#0) to the member_name.
1666 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1667 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1668 JRT_ENTRY_PROF(void, InterpreterRuntime, member_name_arg_or_null,
1669 InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1670 Method* method, address bcp))
1671 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1672 if (code != Bytecodes::_invokestatic) {
1673 return;
1674 }
1675 ConstantPool* cpool = method->constants();
1676 int cp_index = Bytes::get_native_u2(bcp + 1);
1677 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1678 Symbol* mname = cpool->name_ref_at(cp_index, code);
1679
1680 if (MethodHandles::has_member_arg(cname, mname)) {
1681 oop member_name_oop = cast_to_oop(member_name);
1682 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1683 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1684 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1685 }
1686 current->set_vm_result_oop(member_name_oop);
1687 } else {
1688 current->set_vm_result_oop(nullptr);
1689 }
1690 JRT_END
1691 #endif // INCLUDE_JVMTI
1692
1693 #ifndef PRODUCT
1694 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1695 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1696 // The generated code still uses call_VM because that will set up the frame pointer for
1697 // bcp and method.
1698 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1699 assert(current == JavaThread::current(), "pre-condition");
1700 LastFrameAccessor last_frame(current);
1701 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1702 methodHandle mh(current, last_frame.method());
1703 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2, tty);
1704 return preserve_this_value;
1705 JRT_END
1706 #endif // !PRODUCT
1707
1708 #ifdef ASSERT
1709 bool InterpreterRuntime::is_preemptable_call(address entry_point) {
1710 return entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter) ||
1711 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache) ||
1712 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::_new);
1713 }
1714 #endif // ASSERT
1715
1716 #define DO_COUNTERS(macro) \
1717 macro(InterpreterRuntime, ldc) \
1718 macro(InterpreterRuntime, resolve_ldc) \
1719 macro(InterpreterRuntime, new) \
1720 macro(InterpreterRuntime, newarray) \
1721 macro(InterpreterRuntime, anewarray) \
1722 macro(InterpreterRuntime, multianewarray) \
1723 macro(InterpreterRuntime, register_finalizer) \
1724 macro(InterpreterRuntime, quicken_io_cc) \
1725 macro(InterpreterRuntime, throw_StackOverflowError) \
1726 macro(InterpreterRuntime, throw_delayed_StackOverflowError) \
1727 macro(InterpreterRuntime, create_exception) \
1728 macro(InterpreterRuntime, create_klass_exception) \
1729 macro(InterpreterRuntime, throw_ArrayIndexOutOfBoundsException) \
1730 macro(InterpreterRuntime, throw_ClassCastException) \
1731 macro(InterpreterRuntime, exception_handler_for_exception) \
1732 macro(InterpreterRuntime, throw_pending_exception) \
1733 macro(InterpreterRuntime, throw_AbstractMethodError) \
1734 macro(InterpreterRuntime, throw_AbstractMethodErrorWithMethod) \
1735 macro(InterpreterRuntime, throw_AbstractMethodErrorVerbose) \
1736 macro(InterpreterRuntime, throw_IncompatibleClassChangeError) \
1737 macro(InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose) \
1738 macro(InterpreterRuntime, throw_NullPointerException) \
1739 macro(InterpreterRuntime, monitorenter) \
1740 macro(InterpreterRuntime, monitorexit) \
1741 macro(InterpreterRuntime, throw_illegal_monitor_state_exception) \
1742 macro(InterpreterRuntime, new_illegal_monitor_state_exception) \
1743 macro(InterpreterRuntime, get_original_bytecode_at) \
1744 macro(InterpreterRuntime, set_original_bytecode_at) \
1745 macro(InterpreterRuntime, breakpoint) \
1746 macro(InterpreterRuntime, resolve_getfield) \
1747 macro(InterpreterRuntime, resolve_putfield) \
1748 macro(InterpreterRuntime, resolve_getstatic) \
1749 macro(InterpreterRuntime, resolve_putstatic) \
1750 macro(InterpreterRuntime, resolve_invokevirtual) \
1751 macro(InterpreterRuntime, resolve_invokespecial) \
1752 macro(InterpreterRuntime, resolve_invokestatic) \
1753 macro(InterpreterRuntime, resolve_invokeinterface) \
1754 macro(InterpreterRuntime, resolve_invokehandle) \
1755 macro(InterpreterRuntime, resolve_invokedynamic) \
1756 macro(InterpreterRuntime, frequency_counter_overflow) \
1757 macro(InterpreterRuntime, bcp_to_di) \
1758 macro(InterpreterRuntime, update_mdp_for_ret) \
1759 macro(InterpreterRuntime, build_method_counters) \
1760 macro(InterpreterRuntime, at_safepoint) \
1761 macro(InterpreterRuntime, at_unwind) \
1762 macro(InterpreterRuntime, post_field_access) \
1763 macro(InterpreterRuntime, post_field_modification) \
1764 macro(InterpreterRuntime, post_method_entry) \
1765 macro(InterpreterRuntime, post_method_exit) \
1766 macro(InterpreterRuntime, interpreter_contains) \
1767 macro(InterpreterRuntime, prepare_native_call)
1768
1769 #if INCLUDE_JVMTI
1770 #define DO_JVMTI_COUNTERS(macro) \
1771 macro(InterpreterRuntime, member_name_arg_or_null)
1772 #else
1773 #define DO_JVMTI_COUNTERS(macro)
1774 #endif /* INCLUDE_JVMTI */
1775
1776 #define INIT_COUNTER(sub, name) \
1777 NEWPERFTICKCOUNTERS(_perf_##sub##_##name##_timer, SUN_CI, #sub "::" #name); \
1778 NEWPERFEVENTCOUNTER(_perf_##sub##_##name##_count, SUN_CI, #sub "::" #name "_count");
1779
1780 void InterpreterRuntime::init_counters() {
1781 if (UsePerfData) {
1782 EXCEPTION_MARK;
1783
1784 DO_COUNTERS(INIT_COUNTER)
1785 DO_JVMTI_COUNTERS(INIT_COUNTER)
1786
1787 if (HAS_PENDING_EXCEPTION) {
1788 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
1789 }
1790 }
1791 }
1792 #undef INIT_COUNTER
1793
1794 #define PRINT_COUNTER(sub, name) { \
1795 jlong count = _perf_##sub##_##name##_count->get_value(); \
1796 if (count > 0) { \
1797 st->print_cr(" %-50s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
1798 #sub "::" #name, \
1799 _perf_##sub##_##name##_timer->elapsed_counter_value_us(), \
1800 _perf_##sub##_##name##_timer->thread_counter_value_us(), \
1801 count); \
1802 }}
1803
1804 void InterpreterRuntime::print_counters_on(outputStream* st) {
1805 if (UsePerfData && ProfileRuntimeCalls) {
1806 DO_COUNTERS(PRINT_COUNTER)
1807 DO_JVMTI_COUNTERS(PRINT_COUNTER)
1808 } else {
1809 st->print_cr(" InterpreterRuntime: no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
1810 }
1811 }
1812
1813 #undef PRINT_COUNTER
1814 #undef DO_JVMTI_COUNTERS
1815 #undef DO_COUNTERS