1 /*
2 * Copyright (c) 1997, 2024, 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 "precompiled.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/vmClasses.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "compiler/compilationPolicy.hpp"
32 #include "compiler/compileBroker.hpp"
33 #include "compiler/disassembler.hpp"
34 #include "gc/shared/barrierSetNMethod.hpp"
35 #include "gc/shared/collectedHeap.hpp"
36 #include "interpreter/bytecodeTracer.hpp"
37 #include "interpreter/interpreter.hpp"
38 #include "interpreter/interpreterRuntime.hpp"
39 #include "interpreter/linkResolver.hpp"
40 #include "interpreter/templateTable.hpp"
41 #include "jvm_io.h"
42 #include "logging/log.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.hpp"
46 #include "oops/constantPool.inline.hpp"
47 #include "oops/cpCache.inline.hpp"
48 #include "oops/instanceKlass.inline.hpp"
49 #include "oops/klass.inline.hpp"
50 #include "oops/methodData.hpp"
51 #include "oops/method.inline.hpp"
52 #include "oops/objArrayKlass.hpp"
53 #include "oops/objArrayOop.inline.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/symbol.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/methodHandles.hpp"
58 #include "prims/nativeLookup.hpp"
59 #include "runtime/atomic.hpp"
60 #include "runtime/continuation.hpp"
61 #include "runtime/deoptimization.hpp"
62 #include "runtime/fieldDescriptor.inline.hpp"
63 #include "runtime/frame.inline.hpp"
64 #include "runtime/handles.inline.hpp"
65 #include "runtime/icache.hpp"
66 #include "runtime/interfaceSupport.inline.hpp"
67 #include "runtime/java.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/jfieldIDWorkaround.hpp"
70 #include "runtime/osThread.hpp"
71 #include "runtime/perfData.inline.hpp"
72 #include "runtime/sharedRuntime.hpp"
73 #include "runtime/stackWatermarkSet.hpp"
74 #include "runtime/stubRoutines.hpp"
75 #include "runtime/synchronizer.inline.hpp"
76 #include "runtime/threadCritical.hpp"
77 #include "services/management.hpp"
78 #include "utilities/align.hpp"
79 #include "utilities/checkedCast.hpp"
80 #include "utilities/copy.hpp"
81 #include "utilities/events.hpp"
82 #ifdef COMPILER2
83 #include "opto/runtime.hpp"
84 #endif
85
86 // Helper class to access current interpreter state
87 class LastFrameAccessor : public StackObj {
88 frame _last_frame;
89 public:
90 LastFrameAccessor(JavaThread* current) {
91 assert(current == Thread::current(), "sanity");
92 _last_frame = current->last_frame();
93 }
94 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
95 Method* method() const { return _last_frame.interpreter_frame_method(); }
96 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
97 int bci() const { return _last_frame.interpreter_frame_bci(); }
98 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
99
100 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
101 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
102
103 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
104 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
105
106 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
107 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
108 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
109 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
110 int number_of_dimensions() const { return bcp()[3]; }
111
112 oop callee_receiver(Symbol* signature) {
113 return _last_frame.interpreter_callee_receiver(signature);
114 }
115 BasicObjectLock* monitor_begin() const {
116 return _last_frame.interpreter_frame_monitor_begin();
117 }
118 BasicObjectLock* monitor_end() const {
119 return _last_frame.interpreter_frame_monitor_end();
120 }
121 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
122 return _last_frame.next_monitor_in_interpreter_frame(current);
123 }
124
125 frame& get_frame() { return _last_frame; }
126 };
127
128 static bool is_resolved(JavaThread* current) {
129 LastFrameAccessor last_frame(current);
130 ConstantPool* constants = last_frame.method()->constants();
131 Bytecodes::Code bc = last_frame.code();
132
133 if (bc == Bytecodes::_ldc || bc == Bytecodes::_ldc_w || bc == Bytecodes::_ldc2_w ||
134 bc == Bytecodes::_fast_aldc || bc == Bytecodes::_fast_aldc_w) {
135 bool is_wide = (bc != Bytecodes::_ldc) && (bc != Bytecodes::_fast_aldc);
136 int index = (is_wide ? last_frame.get_index_u1(bc) : last_frame.get_index_u2(bc));
137 constantTag tag = constants->tag_at(index);
138 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
139 return constants->tag_at(index).is_klass();
140 } else if (bc == Bytecodes::_invokedynamic) {
141 int index = last_frame.get_index_u4(bc);
142 int indy_index = index;
143 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
144 return indy_entry->is_resolved();
145 } else if (Bytecodes::is_invoke(bc)) {
146 int index = last_frame.get_index_u2(bc);
147 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
148 return rme->is_resolved(bc);
149 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
150 if (bc == Bytecodes::_nofast_getfield) {
151 bc = Bytecodes::_getfield;
152 } else if (bc == Bytecodes::_nofast_putfield) {
153 bc = Bytecodes::_putfield;
154 }
155 int index = last_frame.get_index_u2(bc);
156 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
157 return field_entry->is_resolved(bc);
158 } else if (bc == Bytecodes::_new) {
159 int index = last_frame.get_index_u2(bc);
160 constantTag tag = constants->tag_at(index);
161 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
162 return constants->tag_at(index).is_klass();
163 }
164 return false;
165 }
166
167 static void trace_current_location(JavaThread* current) {
168 LogStreamHandle(Debug, init, interpreter) log;
169 if (current->profile_rt_calls() && log.is_enabled()) {
170 ResourceMark rm(current);
171 LastFrameAccessor last_frame(current);
172 Method* caller = last_frame.method();
173 ConstantPool* constants = caller->constants();
174 Bytecodes::Code bc = last_frame.code();
175 log.print("InterpreterRuntime: " INTPTR_FORMAT ": %s: " INTPTR_FORMAT,
176 p2i(current), Bytecodes::name(bc), p2i(caller));
177 if (caller->is_shared()) {
178 log.print(" shared");
179 }
180 if (is_resolved(current)) {
181 log.print(" resolved");
182 }
183 log.print(" ");
184 caller->print_short_name(&log);
185 log.print(" @ %d:", last_frame.bci());
186 int instruction_size = last_frame.bytecode().instruction_size();
187
188 if (Bytecodes::is_invoke(bc) && bc != Bytecodes::_invokedynamic) {
189 int index = last_frame.get_index_u2(bc);
190 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
191 if (rme->is_resolved(bc)) {
192 Method* m = rme->method();
193 if (m != nullptr) {
194 log.print(" %s", m->method_holder()->init_state_name());
195 } else {
196 log.print(" null");
197 }
198 }
199 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
200 if (bc == Bytecodes::_nofast_getfield) {
201 bc = Bytecodes::_getfield;
202 } else if (bc == Bytecodes::_nofast_putfield) {
203 bc = Bytecodes::_putfield;
204 }
205 int index = last_frame.get_index_u2(bc);
206 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
207
208 if (field_entry->is_resolved(bc)) {
209 log.print(" %s", field_entry->field_holder()->init_state_name());
210 }
211 } else if (bc == Bytecodes::_new) {
212 int index = last_frame.get_index_u2(bc);
213 constantTag tag = constants->tag_at(index);
214 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
215 if (constants->tag_at(index).is_klass()) {
216 CPKlassSlot kslot = constants->klass_slot_at(index);
217 int resolved_klass_index = kslot.resolved_klass_index();
218 Klass* k = constants->resolved_klasses()->at(resolved_klass_index);
219 log.print(": %s", InstanceKlass::cast(k)->init_state_name());
220 }
221 }
222 log.print(" ");
223 caller->print_codes_on(last_frame.bci(), last_frame.bci() + instruction_size, &log, /*flags*/ 0);
224
225 LogStreamHandle(Trace, init, interpreter) log1;
226 if (log1.is_enabled()) {
227 if (bc == Bytecodes::_invokedynamic) {
228 int index = last_frame.get_index_u4(bc);
229 int indy_index = index;
230 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
231 indy_entry->print_on(&log1);
232 } else if (Bytecodes::is_invoke(bc)) {
233 int index = last_frame.get_index_u2(bc);
234 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
235 rme->print_on(&log1);
236 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
237 int index = last_frame.get_index_u2(bc);
238 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
239 field_entry->print_on(&log1);
240 }
241 }
242 }
243 }
244
245 //------------------------------------------------------------------------------------------------------------------------
246 // State accessors
247
248 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
249 LastFrameAccessor last_frame(current);
250 last_frame.set_bcp(bcp);
251 if (ProfileInterpreter) {
252 // ProfileTraps uses MDOs independently of ProfileInterpreter.
253 // That is why we must check both ProfileInterpreter and mdo != nullptr.
254 MethodData* mdo = last_frame.method()->method_data();
255 if (mdo != nullptr) {
256 NEEDS_CLEANUP;
257 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
258 }
259 }
260 }
261
262 //------------------------------------------------------------------------------------------------------------------------
263 // Constants
264
265
266 JRT_ENTRY_PROF(void, InterpreterRuntime, ldc, InterpreterRuntime::ldc(JavaThread* current, bool wide))
267 // access constant pool
268 LastFrameAccessor last_frame(current);
269 ConstantPool* pool = last_frame.method()->constants();
270 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
271 constantTag tag = pool->tag_at(cp_index);
272
273 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
274 Klass* klass = pool->klass_at(cp_index, CHECK);
275 oop java_class = klass->java_mirror();
276 current->set_vm_result(java_class);
277 JRT_END
278
279 JRT_ENTRY_PROF(void, InterpreterRuntime, resolve_ldc, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
280 assert(bytecode == Bytecodes::_ldc ||
281 bytecode == Bytecodes::_ldc_w ||
282 bytecode == Bytecodes::_ldc2_w ||
283 bytecode == Bytecodes::_fast_aldc ||
284 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
285 ResourceMark rm(current);
286 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
287 bytecode == Bytecodes::_fast_aldc_w);
288 LastFrameAccessor last_frame(current);
289 methodHandle m (current, last_frame.method());
290 Bytecode_loadconstant ldc(m, last_frame.bci());
291
292 // Double-check the size. (Condy can have any type.)
293 BasicType type = ldc.result_type();
294 switch (type2size[type]) {
295 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
296 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
297 default: ShouldNotReachHere();
298 }
299
300 // Resolve the constant. This does not do unboxing.
301 // But it does replace Universe::the_null_sentinel by null.
302 oop result = ldc.resolve_constant(CHECK);
303 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
304
305 #ifdef ASSERT
306 {
307 // The bytecode wrappers aren't GC-safe so construct a new one
308 Bytecode_loadconstant ldc2(m, last_frame.bci());
309 int rindex = ldc2.cache_index();
310 if (rindex < 0)
311 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
312 if (rindex >= 0) {
313 oop coop = m->constants()->resolved_reference_at(rindex);
314 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
315 assert(roop == coop, "expected result for assembly code");
316 }
317 }
318 #endif
319 current->set_vm_result(result);
320 if (!is_fast_aldc) {
321 // Tell the interpreter how to unbox the primitive.
322 guarantee(java_lang_boxing_object::is_instance(result, type), "");
323 int offset = java_lang_boxing_object::value_offset(type);
324 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
325 | (offset & ConstantPoolCache::field_index_mask));
326 current->set_vm_result_2((Metadata*)flags);
327 }
328 }
329 JRT_END
330
331
332 //------------------------------------------------------------------------------------------------------------------------
333 // Allocation
334
335 JRT_ENTRY_PROF(void, InterpreterRuntime, new, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
336 Klass* k = pool->klass_at(index, CHECK);
337 InstanceKlass* klass = InstanceKlass::cast(k);
338
339 // Make sure we are not instantiating an abstract klass
340 klass->check_valid_for_instantiation(true, CHECK);
341
342 // Make sure klass is initialized
343 klass->initialize(CHECK);
344
345 oop obj = klass->allocate_instance(CHECK);
346 current->set_vm_result(obj);
347 JRT_END
348
349
350 JRT_ENTRY_PROF(void, InterpreterRuntime, newarray, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
351 oop obj = oopFactory::new_typeArray(type, size, CHECK);
352 current->set_vm_result(obj);
353 JRT_END
354
355
356 JRT_ENTRY_PROF(void, InterpreterRuntime, anewarray, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
357 Klass* klass = pool->klass_at(index, CHECK);
358 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
359 current->set_vm_result(obj);
360 JRT_END
361
362
363 JRT_ENTRY_PROF(void, InterpreterRuntime, multianewarray, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
364 // We may want to pass in more arguments - could make this slightly faster
365 LastFrameAccessor last_frame(current);
366 ConstantPool* constants = last_frame.method()->constants();
367 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
368 Klass* klass = constants->klass_at(i, CHECK);
369 int nof_dims = last_frame.number_of_dimensions();
370 assert(klass->is_klass(), "not a class");
371 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
372
373 // We must create an array of jints to pass to multi_allocate.
374 ResourceMark rm(current);
375 const int small_dims = 10;
376 jint dim_array[small_dims];
377 jint *dims = &dim_array[0];
378 if (nof_dims > small_dims) {
379 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
380 }
381 for (int index = 0; index < nof_dims; index++) {
382 // offset from first_size_address is addressed as local[index]
383 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
384 dims[index] = first_size_address[n];
385 }
386 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
387 current->set_vm_result(obj);
388 JRT_END
389
390
391 JRT_ENTRY_PROF(void, InterpreterRuntime, register_finalizer, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
392 assert(oopDesc::is_oop(obj), "must be a valid oop");
393 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
394 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
395 JRT_END
396
397
398 // Quicken instance-of and check-cast bytecodes
399 JRT_ENTRY_PROF(void, InterpreterRuntime, quicken_io_cc, InterpreterRuntime::quicken_io_cc(JavaThread* current))
400 // Force resolving; quicken the bytecode
401 LastFrameAccessor last_frame(current);
402 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
403 ConstantPool* cpool = last_frame.method()->constants();
404 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
405 // program we might have seen an unquick'd bytecode in the interpreter but have another
406 // thread quicken the bytecode before we get here.
407 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
408 Klass* klass = cpool->klass_at(which, CHECK);
409 current->set_vm_result_2(klass);
410 JRT_END
411
412
413 //------------------------------------------------------------------------------------------------------------------------
414 // Exceptions
415
416 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
417 const methodHandle& trap_method, int trap_bci) {
418 if (trap_method.not_null()) {
419 MethodData* trap_mdo = trap_method->method_data();
420 if (trap_mdo == nullptr) {
421 ExceptionMark em(current);
422 JavaThread* THREAD = current; // For exception macros.
423 Method::build_profiling_method_data(trap_method, THREAD);
424 if (HAS_PENDING_EXCEPTION) {
425 // Only metaspace OOM is expected. No Java code executed.
426 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
427 "we expect only an OOM error here");
428 CLEAR_PENDING_EXCEPTION;
429 }
430 trap_mdo = trap_method->method_data();
431 // and fall through...
432 }
433 if (trap_mdo != nullptr) {
434 // Update per-method count of trap events. The interpreter
435 // is updating the MDO to simulate the effect of compiler traps.
436 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
437 }
438 }
439 }
440
441 // Assume the compiler is (or will be) interested in this event.
442 // If necessary, create an MDO to hold the information, and record it.
443 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
444 assert(ProfileTraps, "call me only if profiling");
445 LastFrameAccessor last_frame(current);
446 methodHandle trap_method(current, last_frame.method());
447 int trap_bci = trap_method->bci_from(last_frame.bcp());
448 note_trap_inner(current, reason, trap_method, trap_bci);
449 }
450
451 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
452 // get klass
453 InstanceKlass* klass = InstanceKlass::cast(k);
454 assert(klass->is_initialized(),
455 "this klass should have been initialized during VM initialization");
456 // create instance - do not call constructor since we may have no
457 // (java) stack space left (should assert constructor is empty)
458 Handle exception;
459 oop exception_oop = klass->allocate_instance(CHECK_(exception));
460 exception = Handle(THREAD, exception_oop);
461 if (StackTraceInThrowable) {
462 java_lang_Throwable::fill_in_stack_trace(exception);
463 }
464 return exception;
465 }
466
467 // Special handling for stack overflow: since we don't have any (java) stack
468 // space left we use the pre-allocated & pre-initialized StackOverflowError
469 // klass to create an stack overflow error instance. We do not call its
470 // constructor for the same reason (it is empty, anyway).
471 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_StackOverflowError,
472 InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
473 Handle exception = get_preinitialized_exception(
474 vmClasses::StackOverflowError_klass(),
475 CHECK);
476 // Increment counter for hs_err file reporting
477 Atomic::inc(&Exceptions::_stack_overflow_errors);
478 // Remove the ScopedValue bindings in case we got a StackOverflowError
479 // while we were trying to manipulate ScopedValue bindings.
480 current->clear_scopedValueBindings();
481 THROW_HANDLE(exception);
482 JRT_END
483
484 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_delayed_StackOverflowError,
485 InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
486 Handle exception = get_preinitialized_exception(
487 vmClasses::StackOverflowError_klass(),
488 CHECK);
489 java_lang_Throwable::set_message(exception(),
490 Universe::delayed_stack_overflow_error_message());
491 // Increment counter for hs_err file reporting
492 Atomic::inc(&Exceptions::_stack_overflow_errors);
493 // Remove the ScopedValue bindings in case we got a StackOverflowError
494 // while we were trying to manipulate ScopedValue bindings.
495 current->clear_scopedValueBindings();
496 THROW_HANDLE(exception);
497 JRT_END
498
499 JRT_ENTRY_PROF(void, InterpreterRuntime, create_exception,
500 InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
501 // lookup exception klass
502 TempNewSymbol s = SymbolTable::new_symbol(name);
503 if (ProfileTraps) {
504 if (s == vmSymbols::java_lang_ArithmeticException()) {
505 note_trap(current, Deoptimization::Reason_div0_check);
506 } else if (s == vmSymbols::java_lang_NullPointerException()) {
507 note_trap(current, Deoptimization::Reason_null_check);
508 }
509 }
510 // create exception
511 Handle exception = Exceptions::new_exception(current, s, message);
512 current->set_vm_result(exception());
513 JRT_END
514
515
516 JRT_ENTRY_PROF(void, InterpreterRuntime, create_klass_exception,
517 InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
518 // Produce the error message first because note_trap can safepoint
519 ResourceMark rm(current);
520 const char* klass_name = obj->klass()->external_name();
521 // lookup exception klass
522 TempNewSymbol s = SymbolTable::new_symbol(name);
523 if (ProfileTraps) {
524 if (s == vmSymbols::java_lang_ArrayStoreException()) {
525 note_trap(current, Deoptimization::Reason_array_check);
526 } else {
527 note_trap(current, Deoptimization::Reason_class_check);
528 }
529 }
530 // create exception, with klass name as detail message
531 Handle exception = Exceptions::new_exception(current, s, klass_name);
532 current->set_vm_result(exception());
533 JRT_END
534
535 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ArrayIndexOutOfBoundsException,
536 InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
537 // Produce the error message first because note_trap can safepoint
538 ResourceMark rm(current);
539 stringStream ss;
540 ss.print("Index %d out of bounds for length %d", index, a->length());
541
542 if (ProfileTraps) {
543 note_trap(current, Deoptimization::Reason_range_check);
544 }
545
546 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
547 JRT_END
548
549 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ClassCastException,
550 InterpreterRuntime::throw_ClassCastException(
551 JavaThread* current, oopDesc* obj))
552
553 // Produce the error message first because note_trap can safepoint
554 ResourceMark rm(current);
555 char* message = SharedRuntime::generate_class_cast_message(
556 current, obj->klass());
557
558 if (ProfileTraps) {
559 note_trap(current, Deoptimization::Reason_class_check);
560 }
561
562 // create exception
563 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
564 JRT_END
565
566 // exception_handler_for_exception(...) returns the continuation address,
567 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
568 // The exception oop is returned to make sure it is preserved over GC (it
569 // is only on the stack if the exception was thrown explicitly via athrow).
570 // During this operation, the expression stack contains the values for the
571 // bci where the exception happened. If the exception was propagated back
572 // from a call, the expression stack contains the values for the bci at the
573 // invoke w/o arguments (i.e., as if one were inside the call).
574 // Note that the implementation of this method assumes it's only called when an exception has actually occured
575 JRT_ENTRY_PROF(address, InterpreterRuntime, exception_handler_for_exception,
576 InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
577 // We get here after we have unwound from a callee throwing an exception
578 // into the interpreter. Any deferred stack processing is notified of
579 // the event via the StackWatermarkSet.
580 StackWatermarkSet::after_unwind(current);
581
582 LastFrameAccessor last_frame(current);
583 Handle h_exception(current, exception);
584 methodHandle h_method (current, last_frame.method());
585 constantPoolHandle h_constants(current, h_method->constants());
586 bool should_repeat;
587 int handler_bci;
588 int current_bci = last_frame.bci();
589
590 if (current->frames_to_pop_failed_realloc() > 0) {
591 // Allocation of scalar replaced object used in this frame
592 // failed. Unconditionally pop the frame.
593 current->dec_frames_to_pop_failed_realloc();
594 current->set_vm_result(h_exception());
595 // If the method is synchronized we already unlocked the monitor
596 // during deoptimization so the interpreter needs to skip it when
597 // the frame is popped.
598 current->set_do_not_unlock_if_synchronized(true);
599 return Interpreter::remove_activation_entry();
600 }
601
602 // Need to do this check first since when _do_not_unlock_if_synchronized
603 // is set, we don't want to trigger any classloading which may make calls
604 // into java, or surprisingly find a matching exception handler for bci 0
605 // since at this moment the method hasn't been "officially" entered yet.
606 if (current->do_not_unlock_if_synchronized()) {
607 ResourceMark rm;
608 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
609 current->set_vm_result(exception);
610 return Interpreter::remove_activation_entry();
611 }
612
613 do {
614 should_repeat = false;
615
616 // assertions
617 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
618 // Check that exception is a subclass of Throwable.
619 assert(h_exception->is_a(vmClasses::Throwable_klass()),
620 "Exception not subclass of Throwable");
621
622 // tracing
623 if (log_is_enabled(Info, exceptions)) {
624 ResourceMark rm(current);
625 stringStream tempst;
626 tempst.print("interpreter method <%s>\n"
627 " at bci %d for thread " INTPTR_FORMAT " (%s)",
628 h_method->print_value_string(), current_bci, p2i(current), current->name());
629 Exceptions::log_exception(h_exception, tempst.as_string());
630 }
631 // Don't go paging in something which won't be used.
632 // else if (extable->length() == 0) {
633 // // disabled for now - interpreter is not using shortcut yet
634 // // (shortcut is not to call runtime if we have no exception handlers)
635 // // warning("performance bug: should not call runtime if method has no exception handlers");
636 // }
637 // for AbortVMOnException flag
638 Exceptions::debug_check_abort(h_exception);
639
640 // exception handler lookup
641 Klass* klass = h_exception->klass();
642 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
643 if (HAS_PENDING_EXCEPTION) {
644 // We threw an exception while trying to find the exception handler.
645 // Transfer the new exception to the exception handle which will
646 // be set into thread local storage, and do another lookup for an
647 // exception handler for this exception, this time starting at the
648 // BCI of the exception handler which caused the exception to be
649 // thrown (bug 4307310).
650 h_exception = Handle(THREAD, PENDING_EXCEPTION);
651 CLEAR_PENDING_EXCEPTION;
652 if (handler_bci >= 0) {
653 current_bci = handler_bci;
654 should_repeat = true;
655 }
656 }
657 } while (should_repeat == true);
658
659 #if INCLUDE_JVMCI
660 if (EnableJVMCI && h_method->method_data() != nullptr) {
661 ResourceMark rm(current);
662 MethodData* mdo = h_method->method_data();
663
664 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
665 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
666
667 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
668 if (pdata != nullptr && pdata->is_BitData()) {
669 BitData* bit_data = (BitData*) pdata;
670 bit_data->set_exception_seen();
671 }
672 }
673 #endif
674
675 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
676 // time throw or a stack unwinding throw and accordingly notify the debugger
677 if (JvmtiExport::can_post_on_exceptions()) {
678 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
679 }
680
681 address continuation = nullptr;
682 address handler_pc = nullptr;
683 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
684 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
685 // handler in this method, or (b) after a stack overflow there is not yet
686 // enough stack space available to reprotect the stack.
687 continuation = Interpreter::remove_activation_entry();
688 #if COMPILER2_OR_JVMCI
689 // Count this for compilation purposes
690 h_method->interpreter_throwout_increment(THREAD);
691 #endif
692 } else {
693 // handler in this method => change bci/bcp to handler bci/bcp and continue there
694 handler_pc = h_method->code_base() + handler_bci;
695 h_method->set_exception_handler_entered(handler_bci); // profiling
696 #ifndef ZERO
697 set_bcp_and_mdp(handler_pc, current);
698 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
699 #else
700 continuation = (address)(intptr_t) handler_bci;
701 #endif
702 }
703
704 // notify debugger of an exception catch
705 // (this is good for exceptions caught in native methods as well)
706 if (JvmtiExport::can_post_on_exceptions()) {
707 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
708 }
709
710 current->set_vm_result(h_exception());
711 return continuation;
712 JRT_END
713
714
715 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_pending_exception, InterpreterRuntime::throw_pending_exception(JavaThread* current))
716 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
717 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
718 JRT_END
719
720
721 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodError, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
722 THROW(vmSymbols::java_lang_AbstractMethodError());
723 JRT_END
724
725 // This method is called from the "abstract_entry" of the interpreter.
726 // At that point, the arguments have already been removed from the stack
727 // and therefore we don't have the receiver object at our fingertips. (Though,
728 // on some platforms the receiver still resides in a register...). Thus,
729 // we have no choice but print an error message not containing the receiver
730 // type.
731 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorWithMethod,
732 InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
733 Method* missingMethod))
734 ResourceMark rm(current);
735 assert(missingMethod != nullptr, "sanity");
736 methodHandle m(current, missingMethod);
737 LinkResolver::throw_abstract_method_error(m, THREAD);
738 JRT_END
739
740 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorVerbose,
741 InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
742 Klass* recvKlass,
743 Method* missingMethod))
744 ResourceMark rm(current);
745 methodHandle mh = methodHandle(current, missingMethod);
746 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
747 JRT_END
748
749
750 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeError,
751 InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
752 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
753 JRT_END
754
755 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose,
756 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
757 Klass* recvKlass,
758 Klass* interfaceKlass))
759 ResourceMark rm(current);
760 char buf[1000];
761 buf[0] = '\0';
762 jio_snprintf(buf, sizeof(buf),
763 "Class %s does not implement the requested interface %s",
764 recvKlass ? recvKlass->external_name() : "nullptr",
765 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
766 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
767 JRT_END
768
769 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_NullPointerException,
770 InterpreterRuntime::throw_NullPointerException(JavaThread* current))
771 THROW(vmSymbols::java_lang_NullPointerException());
772 JRT_END
773
774 //------------------------------------------------------------------------------------------------------------------------
775 // Fields
776 //
777
778 PROF_ENTRY(void, InterpreterRuntime, resolve_getfield, InterpreterRuntime::resolve_getfield(JavaThread* current))
779 resolve_get_put(current, Bytecodes::_getfield);
780 PROF_END
781
782 PROF_ENTRY(void, InterpreterRuntime, resolve_putfield, InterpreterRuntime::resolve_putfield(JavaThread* current))
783 resolve_get_put(current, Bytecodes::_putfield);
784 PROF_END
785
786 PROF_ENTRY(void, InterpreterRuntime, resolve_getstatic, InterpreterRuntime::resolve_getstatic(JavaThread* current))
787 resolve_get_put(current, Bytecodes::_getstatic);
788 PROF_END
789
790 PROF_ENTRY(void, InterpreterRuntime, resolve_putstatic, InterpreterRuntime::resolve_putstatic(JavaThread* current))
791 resolve_get_put(current, Bytecodes::_putstatic);
792 PROF_END
793
794 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
795 LastFrameAccessor last_frame(current);
796 constantPoolHandle pool(current, last_frame.method()->constants());
797 methodHandle m(current, last_frame.method());
798
799 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
800 }
801
802 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
803 methodHandle& m,
804 constantPoolHandle& pool,
805 bool initialize_holder, TRAPS) {
806 fieldDescriptor info;
807 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
808 bytecode == Bytecodes::_putstatic);
809 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
810
811 {
812 JvmtiHideSingleStepping jhss(THREAD);
813 LinkResolver::resolve_field_access(info, pool, field_index,
814 m, bytecode, initialize_holder, CHECK);
815 } // end JvmtiHideSingleStepping
816
817 // check if link resolution caused cpCache to be updated
818 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
819
820 // compute auxiliary field attributes
821 TosState state = as_TosState(info.field_type());
822
823 // Resolution of put instructions on final fields is delayed. That is required so that
824 // exceptions are thrown at the correct place (when the instruction is actually invoked).
825 // If we do not resolve an instruction in the current pass, leaving the put_code
826 // set to zero will cause the next put instruction to the same field to reresolve.
827
828 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
829 // to final instance fields with updates originating from a method different than <init>)
830 // is inhibited. A putfield instruction targeting an instance final field must throw
831 // an IllegalAccessError if the instruction is not in an instance
832 // initializer method <init>. If resolution were not inhibited, a putfield
833 // in an initializer method could be resolved in the initializer. Subsequent
834 // putfield instructions to the same field would then use cached information.
835 // As a result, those instructions would not pass through the VM. That is,
836 // checks in resolve_field_access() would not be executed for those instructions
837 // and the required IllegalAccessError would not be thrown.
838 //
839 // Also, we need to delay resolving getstatic and putstatic instructions until the
840 // class is initialized. This is required so that access to the static
841 // field will call the initialization function every time until the class
842 // is completely initialized ala. in 2.17.5 in JVM Specification.
843 InstanceKlass* klass = info.field_holder();
844 bool uninitialized_static = is_static && !klass->is_initialized();
845 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
846 info.has_initialized_final_update();
847 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
848
849 Bytecodes::Code get_code = (Bytecodes::Code)0;
850 Bytecodes::Code put_code = (Bytecodes::Code)0;
851 if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) {
852 #if !defined(X86) && !defined(AARCH64)
853 guarantee(!uninitialized_static, "fast class init checks missing in interpreter"); // FIXME
854 #endif // !X86 && !AARCH64
855 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
856 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
857 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
858 }
859 }
860
861 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
862 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
863 entry->fill_in(info.field_holder(), info.offset(),
864 checked_cast<u2>(info.index()), checked_cast<u1>(state),
865 static_cast<u1>(get_code), static_cast<u1>(put_code));
866 }
867
868
869 //------------------------------------------------------------------------------------------------------------------------
870 // Synchronization
871 //
872 // The interpreter's synchronization code is factored out so that it can
873 // be shared by method invocation and synchronized blocks.
874 //%note synchronization_3
875
876 //%note monitor_1
877 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
878 #ifdef ASSERT
879 current->last_frame().interpreter_frame_verify_monitor(elem);
880 #endif
881 Handle h_obj(current, elem->obj());
882 assert(Universe::heap()->is_in_or_null(h_obj()),
883 "must be null or an object");
884 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
885 assert(Universe::heap()->is_in_or_null(elem->obj()),
886 "must be null or an object");
887 #ifdef ASSERT
888 current->last_frame().interpreter_frame_verify_monitor(elem);
889 #endif
890 JRT_END
891
892 JRT_LEAF_PROF_NO_THREAD(void, InterpreterRuntime, monitorexit, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
893 oop obj = elem->obj();
894 assert(Universe::heap()->is_in(obj), "must be an object");
895 // The object could become unlocked through a JNI call, which we have no other checks for.
896 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
897 if (obj->is_unlocked()) {
898 if (CheckJNICalls) {
899 fatal("Object has been unlocked by JNI");
900 }
901 return;
902 }
903 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
904 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
905 // again at method exit or in the case of an exception.
906 elem->set_obj(nullptr);
907 JRT_END
908
909
910 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_illegal_monitor_state_exception,
911 InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
912 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
913 JRT_END
914
915
916 JRT_ENTRY_PROF(void, InterpreterRuntime, new_illegal_monitor_state_exception,
917 InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
918 // Returns an illegal exception to install into the current thread. The
919 // pending_exception flag is cleared so normal exception handling does not
920 // trigger. Any current installed exception will be overwritten. This
921 // method will be called during an exception unwind.
922
923 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
924 Handle exception(current, current->vm_result());
925 assert(exception() != nullptr, "vm result should be set");
926 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
927 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
928 current->set_vm_result(exception());
929 JRT_END
930
931
932 //------------------------------------------------------------------------------------------------------------------------
933 // Invokes
934
935 JRT_ENTRY_PROF(Bytecodes::Code, InterpreterRuntime, get_original_bytecode_at, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
936 return method->orig_bytecode_at(method->bci_from(bcp));
937 JRT_END
938
939 JRT_ENTRY_PROF(void, InterpreterRuntime, set_original_bytecode_at, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
940 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
941 JRT_END
942
943 JRT_ENTRY_PROF(void, InterpreterRuntime, breakpoint, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
944 JvmtiExport::post_raw_breakpoint(current, method, bcp);
945 JRT_END
946
947 PROF_ENTRY(void, InterpreterRuntime, resolve_invokevirtual, InterpreterRuntime::resolve_invokevirtual(JavaThread* current))
948 resolve_invoke(current, Bytecodes::_invokevirtual);
949 PROF_END
950
951 PROF_ENTRY(void, InterpreterRuntime, resolve_invokespecial, InterpreterRuntime::resolve_invokespecial(JavaThread* current))
952 resolve_invoke(current, Bytecodes::_invokespecial);
953 PROF_END
954
955 PROF_ENTRY(void, InterpreterRuntime, resolve_invokestatic, InterpreterRuntime::resolve_invokestatic(JavaThread* current))
956 resolve_invoke(current, Bytecodes::_invokestatic);
957 PROF_END
958
959 PROF_ENTRY(void, InterpreterRuntime, resolve_invokeinterface, InterpreterRuntime::resolve_invokeinterface(JavaThread* current))
960 resolve_invoke(current, Bytecodes::_invokeinterface);
961 PROF_END
962
963 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
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 JavaThread* THREAD = current; // For exception macros.
992 LinkResolver::resolve_invoke(info, receiver, pool,
993 method_index, bytecode,
994 THREAD);
995
996 if (HAS_PENDING_EXCEPTION) {
997 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
998 // Preserve the original exception across the call to note_trap()
999 PreserveExceptionMark pm(current);
1000 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
1001 note_trap(current, Deoptimization::Reason_null_check);
1002 }
1003 return;
1004 }
1005
1006 resolved_method = methodHandle(current, info.resolved_method());
1007 } // end JvmtiHideSingleStepping
1008
1009 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
1010 }
1011
1012 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
1013 methodHandle& resolved_method,
1014 constantPoolHandle& pool,
1015 int method_index) {
1016 // Don't allow safepoints until the method is cached.
1017 NoSafepointVerifier nsv;
1018
1019 // check if link resolution caused cpCache to be updated
1020 ConstantPoolCache* cache = pool->cache();
1021 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
1022
1023 #ifdef ASSERT
1024 if (bytecode == Bytecodes::_invokeinterface) {
1025 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
1026 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1027 // (see also CallInfo::set_interface for details)
1028 assert(info.call_kind() == CallInfo::vtable_call ||
1029 info.call_kind() == CallInfo::direct_call, "");
1030 assert(resolved_method->is_final() || info.has_vtable_index(),
1031 "should have been set already");
1032 } else if (!resolved_method->has_itable_index()) {
1033 // Resolved something like CharSequence.toString. Use vtable not itable.
1034 assert(info.call_kind() != CallInfo::itable_call, "");
1035 } else {
1036 // Setup itable entry
1037 assert(info.call_kind() == CallInfo::itable_call, "");
1038 int index = resolved_method->itable_index();
1039 assert(info.itable_index() == index, "");
1040 }
1041 } else if (bytecode == Bytecodes::_invokespecial) {
1042 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1043 } else {
1044 assert(info.call_kind() == CallInfo::direct_call ||
1045 info.call_kind() == CallInfo::vtable_call, "");
1046 }
1047 #endif
1048 // Get sender and only set cpCache entry to resolved if it is not an
1049 // interface. The receiver for invokespecial calls within interface
1050 // methods must be checked for every call.
1051 InstanceKlass* sender = pool->pool_holder();
1052
1053 switch (info.call_kind()) {
1054 case CallInfo::direct_call:
1055 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
1056 break;
1057 case CallInfo::vtable_call:
1058 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
1059 break;
1060 case CallInfo::itable_call:
1061 cache->set_itable_call(
1062 bytecode,
1063 method_index,
1064 info.resolved_klass(),
1065 resolved_method,
1066 info.itable_index());
1067 break;
1068 default: ShouldNotReachHere();
1069 }
1070 }
1071
1072 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
1073 constantPoolHandle& pool, TRAPS) {
1074 LinkInfo link_info(pool, method_index, bytecode, CHECK);
1075
1076 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1077 CallInfo call_info;
1078 switch (bytecode) {
1079 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
1080 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1081 case Bytecodes::_invokestatic: LinkResolver::cds_resolve_static_call (call_info, link_info, CHECK); break;
1082 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1083
1084 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1085 }
1086 methodHandle resolved_method(THREAD, call_info.resolved_method());
1087 guarantee(resolved_method->method_holder()->is_linked(), "");
1088 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1089 } else {
1090 // FIXME: why a shared class is not linked yet?
1091 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1092 ResourceMark rm;
1093 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1094 log_info(cds, resolve)("Not resolved: class not linked: %s %s %s",
1095 resolved_iklass->is_shared() ? "is_shared" : "",
1096 resolved_iklass->init_state_name(),
1097 resolved_iklass->external_name());
1098 }
1099 }
1100
1101 // First time execution: Resolve symbols, create a permanent MethodType object.
1102 PROF_ENTRY(void, InterpreterRuntime, resolve_invokehandle, InterpreterRuntime::resolve_invokehandle(JavaThread* current))
1103 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1104 LastFrameAccessor last_frame(current);
1105
1106 // resolve method
1107 CallInfo info;
1108 constantPoolHandle pool(current, last_frame.method()->constants());
1109 int method_index = last_frame.get_index_u2(bytecode);
1110 {
1111 JvmtiHideSingleStepping jhss(current);
1112 JavaThread* THREAD = current; // For exception macros.
1113 LinkResolver::resolve_invoke(info, Handle(), pool,
1114 method_index, bytecode,
1115 CHECK);
1116 } // end JvmtiHideSingleStepping
1117
1118 pool->cache()->set_method_handle(method_index, info);
1119 PROF_END
1120
1121 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1122 constantPoolHandle& pool, TRAPS) {
1123 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1124 CallInfo info;
1125 LinkResolver::resolve_invoke(info, Handle(), pool,
1126 raw_index, bytecode, CHECK);
1127
1128 pool->cache()->set_method_handle(raw_index, info);
1129 }
1130
1131 // First time execution: Resolve symbols, create a permanent CallSite object.
1132 PROF_ENTRY(void, InterpreterRuntime, resolve_invokedynamic, InterpreterRuntime::resolve_invokedynamic(JavaThread* current))
1133 LastFrameAccessor last_frame(current);
1134 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1135
1136 // resolve method
1137 CallInfo info;
1138 constantPoolHandle pool(current, last_frame.method()->constants());
1139 int index = last_frame.get_index_u4(bytecode);
1140 {
1141 JvmtiHideSingleStepping jhss(current);
1142 JavaThread* THREAD = current; // For exception macros.
1143 LinkResolver::resolve_invoke(info, Handle(), pool,
1144 index, bytecode, CHECK);
1145 } // end JvmtiHideSingleStepping
1146
1147 pool->cache()->set_dynamic_call(info, index);
1148 PROF_END
1149
1150 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1151 constantPoolHandle& pool, TRAPS) {
1152 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1153 CallInfo info;
1154 LinkResolver::resolve_invoke(info, Handle(), pool,
1155 raw_index, bytecode, CHECK);
1156 pool->cache()->set_dynamic_call(info, raw_index);
1157 }
1158
1159 // This function is the interface to the assembly code. It returns the resolved
1160 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1161 // This function will check for redefinition!
1162 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1163 trace_current_location(current);
1164
1165 switch (bytecode) {
1166 case Bytecodes::_getstatic: resolve_getstatic(current); break;
1167 case Bytecodes::_putstatic: resolve_putstatic(current); break;
1168 case Bytecodes::_getfield: resolve_getfield(current); break;
1169 case Bytecodes::_putfield: resolve_putfield(current); break;
1170
1171 case Bytecodes::_invokevirtual: resolve_invokevirtual(current); break;
1172 case Bytecodes::_invokespecial: resolve_invokespecial(current); break;
1173 case Bytecodes::_invokestatic: resolve_invokestatic(current); break;
1174 case Bytecodes::_invokeinterface: resolve_invokeinterface(current); break;
1175 case Bytecodes::_invokehandle: resolve_invokehandle(current); break;
1176 case Bytecodes::_invokedynamic: resolve_invokedynamic(current); break;
1177
1178 default:
1179 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1180 break;
1181 }
1182 }
1183 JRT_END
1184
1185 //------------------------------------------------------------------------------------------------------------------------
1186 // Miscellaneous
1187
1188
1189 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1190 // Enable WXWrite: the function is called directly by interpreter.
1191 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1192
1193 // frequency_counter_overflow_inner can throw async exception.
1194 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1195 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1196 if (branch_bcp != nullptr && nm != nullptr) {
1197 // This was a successful request for an OSR nmethod. Because
1198 // frequency_counter_overflow_inner ends with a safepoint check,
1199 // nm could have been unloaded so look it up again. It's unsafe
1200 // to examine nm directly since it might have been freed and used
1201 // for something else.
1202 LastFrameAccessor last_frame(current);
1203 Method* method = last_frame.method();
1204 int bci = method->bci_from(last_frame.bcp());
1205 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1206 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1207 if (nm != nullptr && bs_nm != nullptr) {
1208 // in case the transition passed a safepoint we need to barrier this again
1209 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1210 nm = nullptr;
1211 }
1212 }
1213 }
1214 if (nm != nullptr && current->is_interp_only_mode()) {
1215 // Normally we never get an nm if is_interp_only_mode() is true, because
1216 // policy()->event has a check for this and won't compile the method when
1217 // true. However, it's possible for is_interp_only_mode() to become true
1218 // during the compilation. We don't want to return the nm in that case
1219 // because we want to continue to execute interpreted.
1220 nm = nullptr;
1221 }
1222 #ifndef PRODUCT
1223 if (TraceOnStackReplacement) {
1224 if (nm != nullptr) {
1225 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1226 nm->print();
1227 }
1228 }
1229 #endif
1230 return nm;
1231 }
1232
1233 JRT_ENTRY_PROF(nmethod*, InterpreterRuntime, frequency_counter_overflow,
1234 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1235 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1236 // flag, in case this method triggers classloading which will call into Java.
1237 UnlockFlagSaver fs(current);
1238
1239 LastFrameAccessor last_frame(current);
1240 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1241 methodHandle method(current, last_frame.method());
1242 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1243 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1244
1245 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1246
1247 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1248 if (osr_nm != nullptr && bs_nm != nullptr) {
1249 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1250 osr_nm = nullptr;
1251 }
1252 }
1253 return osr_nm;
1254 JRT_END
1255
1256 JRT_LEAF_PROF_NO_THREAD(jint, InterpreterRuntime, bcp_to_di, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1257 assert(ProfileInterpreter, "must be profiling interpreter");
1258 int bci = method->bci_from(cur_bcp);
1259 MethodData* mdo = method->method_data();
1260 if (mdo == nullptr) return 0;
1261 return mdo->bci_to_di(bci);
1262 JRT_END
1263
1264 #ifdef ASSERT
1265 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1266 assert(ProfileInterpreter, "must be profiling interpreter");
1267
1268 MethodData* mdo = method->method_data();
1269 assert(mdo != nullptr, "must not be null");
1270
1271 int bci = method->bci_from(bcp);
1272
1273 address mdp2 = mdo->bci_to_dp(bci);
1274 if (mdp != mdp2) {
1275 ResourceMark rm;
1276 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1277 int current_di = mdo->dp_to_di(mdp);
1278 int expected_di = mdo->dp_to_di(mdp2);
1279 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1280 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1281 int approx_bci = -1;
1282 if (current_di >= 0) {
1283 approx_bci = mdo->data_at(current_di)->bci();
1284 }
1285 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1286 mdo->print_on(tty);
1287 method->print_codes();
1288 }
1289 assert(mdp == mdp2, "wrong mdp");
1290 JRT_END
1291 #endif // ASSERT
1292
1293 JRT_ENTRY_PROF(void, InterpreterRuntime, update_mdp_for_ret, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1294 assert(ProfileInterpreter, "must be profiling interpreter");
1295 ResourceMark rm(current);
1296 LastFrameAccessor last_frame(current);
1297 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1298 MethodData* h_mdo = last_frame.method()->method_data();
1299
1300 // Grab a lock to ensure atomic access to setting the return bci and
1301 // the displacement. This can block and GC, invalidating all naked oops.
1302 MutexLocker ml(RetData_lock);
1303
1304 // ProfileData is essentially a wrapper around a derived oop, so we
1305 // need to take the lock before making any ProfileData structures.
1306 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1307 guarantee(data != nullptr, "profile data must be valid");
1308 RetData* rdata = data->as_RetData();
1309 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1310 last_frame.set_mdp(new_mdp);
1311 JRT_END
1312
1313 JRT_ENTRY_PROF(MethodCounters*, InterpreterRuntime, build_method_counters, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1314 return Method::build_method_counters(current, m);
1315 JRT_END
1316
1317
1318 JRT_ENTRY_PROF(void, InterpreterRuntime, at_safepoint, InterpreterRuntime::at_safepoint(JavaThread* current))
1319 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1320 // stack traversal automatically takes care of preserving arguments for invoke, so
1321 // this is no longer needed.
1322
1323 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1324 // if this is called during a safepoint
1325
1326 if (JvmtiExport::should_post_single_step()) {
1327 // This function is called by the interpreter when single stepping. Such single
1328 // stepping could unwind a frame. Then, it is important that we process any frames
1329 // that we might return into.
1330 StackWatermarkSet::before_unwind(current);
1331
1332 // We are called during regular safepoints and when the VM is
1333 // single stepping. If any thread is marked for single stepping,
1334 // then we may have JVMTI work to do.
1335 LastFrameAccessor last_frame(current);
1336 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1337 }
1338 JRT_END
1339
1340 JRT_LEAF_PROF(void, InterpreterRuntime, at_unwind, InterpreterRuntime::at_unwind(JavaThread* current))
1341 assert(current == JavaThread::current(), "pre-condition");
1342 // This function is called by the interpreter when the return poll found a reason
1343 // to call the VM. The reason could be that we are returning into a not yet safe
1344 // to access frame. We handle that below.
1345 // Note that this path does not check for single stepping, because we do not want
1346 // to single step when unwinding frames for an exception being thrown. Instead,
1347 // such single stepping code will use the safepoint table, which will use the
1348 // InterpreterRuntime::at_safepoint callback.
1349 StackWatermarkSet::before_unwind(current);
1350 JRT_END
1351
1352 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_access, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1353 ResolvedFieldEntry *entry))
1354
1355 // check the access_flags for the field in the klass
1356
1357 InstanceKlass* ik = entry->field_holder();
1358 int index = entry->field_index();
1359 if (!ik->field_status(index).is_access_watched()) return;
1360
1361 bool is_static = (obj == nullptr);
1362 HandleMark hm(current);
1363
1364 Handle h_obj;
1365 if (!is_static) {
1366 // non-static field accessors have an object, but we need a handle
1367 h_obj = Handle(current, obj);
1368 }
1369 InstanceKlass* field_holder = entry->field_holder(); // HERE
1370 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1371 LastFrameAccessor last_frame(current);
1372 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1373 JRT_END
1374
1375 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_modification, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1376 ResolvedFieldEntry *entry, jvalue *value))
1377
1378 InstanceKlass* ik = entry->field_holder();
1379
1380 // check the access_flags for the field in the klass
1381 int index = entry->field_index();
1382 // bail out if field modifications are not watched
1383 if (!ik->field_status(index).is_modification_watched()) return;
1384
1385 char sig_type = '\0';
1386
1387 switch((TosState)entry->tos_state()) {
1388 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1389 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1390 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1391 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1392 case itos: sig_type = JVM_SIGNATURE_INT; break;
1393 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1394 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1395 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1396 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1397 default: ShouldNotReachHere(); return;
1398 }
1399 bool is_static = (obj == nullptr);
1400
1401 HandleMark hm(current);
1402 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1403 jvalue fvalue;
1404 #ifdef _LP64
1405 fvalue = *value;
1406 #else
1407 // Long/double values are stored unaligned and also noncontiguously with
1408 // tagged stacks. We can't just do a simple assignment even in the non-
1409 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1410 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1411 // We assume that the two halves of longs/doubles are stored in interpreter
1412 // stack slots in platform-endian order.
1413 jlong_accessor u;
1414 jint* newval = (jint*)value;
1415 u.words[0] = newval[0];
1416 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1417 fvalue.j = u.long_value;
1418 #endif // _LP64
1419
1420 Handle h_obj;
1421 if (!is_static) {
1422 // non-static field accessors have an object, but we need a handle
1423 h_obj = Handle(current, obj);
1424 }
1425
1426 LastFrameAccessor last_frame(current);
1427 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1428 fid, sig_type, &fvalue);
1429 JRT_END
1430
1431 JRT_ENTRY_PROF(void, InterpreterRuntime, post_method_entry, InterpreterRuntime::post_method_entry(JavaThread* current))
1432 LastFrameAccessor last_frame(current);
1433 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1434 JRT_END
1435
1436
1437 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1438 // before transitioning to VM, and restore it after transitioning back
1439 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1440 JRT_BLOCK_ENTRY_PROF(void, InterpreterRuntime, post_method_exit, InterpreterRuntime::post_method_exit(JavaThread* current))
1441 LastFrameAccessor last_frame(current);
1442 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1443 JRT_END
1444
1445 JRT_LEAF_PROF_NO_THREAD(int, InterpreterRuntime, interpreter_contains, InterpreterRuntime::interpreter_contains(address pc))
1446 {
1447 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1448 }
1449 JRT_END
1450
1451
1452 // Implementation of SignatureHandlerLibrary
1453
1454 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1455 // Dummy definition (else normalization method is defined in CPU
1456 // dependent code)
1457 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1458 return fingerprint;
1459 }
1460 #endif
1461
1462 address SignatureHandlerLibrary::set_handler_blob() {
1463 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1464 if (handler_blob == nullptr) {
1465 return nullptr;
1466 }
1467 address handler = handler_blob->code_begin();
1468 _handler_blob = handler_blob;
1469 _handler = handler;
1470 return handler;
1471 }
1472
1473 void SignatureHandlerLibrary::initialize() {
1474 if (_fingerprints != nullptr) {
1475 return;
1476 }
1477 if (set_handler_blob() == nullptr) {
1478 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1479 }
1480
1481 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1482 SignatureHandlerLibrary::buffer_size);
1483 _buffer = bb->code_begin();
1484
1485 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1486 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1487 }
1488
1489 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1490 address handler = _handler;
1491 int insts_size = buffer->pure_insts_size();
1492 if (handler + insts_size > _handler_blob->code_end()) {
1493 // get a new handler blob
1494 handler = set_handler_blob();
1495 }
1496 if (handler != nullptr) {
1497 memcpy(handler, buffer->insts_begin(), insts_size);
1498 pd_set_handler(handler);
1499 ICache::invalidate_range(handler, insts_size);
1500 _handler = handler + insts_size;
1501 }
1502 return handler;
1503 }
1504
1505 void SignatureHandlerLibrary::add(const methodHandle& method) {
1506 if (method->signature_handler() == nullptr) {
1507 // use slow signature handler if we can't do better
1508 int handler_index = -1;
1509 // check if we can use customized (fast) signature handler
1510 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1511 // use customized signature handler
1512 MutexLocker mu(SignatureHandlerLibrary_lock);
1513 // make sure data structure is initialized
1514 initialize();
1515 // lookup method signature's fingerprint
1516 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1517 // allow CPU dependent code to optimize the fingerprints for the fast handler
1518 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1519 handler_index = _fingerprints->find(fingerprint);
1520 // create handler if necessary
1521 if (handler_index < 0) {
1522 ResourceMark rm;
1523 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1524 CodeBuffer buffer((address)(_buffer + align_offset),
1525 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1526 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1527 // copy into code heap
1528 address handler = set_handler(&buffer);
1529 if (handler == nullptr) {
1530 // use slow signature handler (without memorizing it in the fingerprints)
1531 } else {
1532 // debugging support
1533 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1534 ttyLocker ttyl;
1535 tty->cr();
1536 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1537 _handlers->length(),
1538 (method->is_static() ? "static" : "receiver"),
1539 method->name_and_sig_as_C_string(),
1540 fingerprint,
1541 buffer.insts_size());
1542 if (buffer.insts_size() > 0) {
1543 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1544 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1545 }
1546 #ifndef PRODUCT
1547 address rh_begin = Interpreter::result_handler(method()->result_type());
1548 if (CodeCache::contains(rh_begin)) {
1549 // else it might be special platform dependent values
1550 tty->print_cr(" --- associated result handler ---");
1551 address rh_end = rh_begin;
1552 while (*(int*)rh_end != 0) {
1553 rh_end += sizeof(int);
1554 }
1555 Disassembler::decode(rh_begin, rh_end);
1556 } else {
1557 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1558 }
1559 #endif
1560 }
1561 // add handler to library
1562 _fingerprints->append(fingerprint);
1563 _handlers->append(handler);
1564 // set handler index
1565 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1566 handler_index = _fingerprints->length() - 1;
1567 }
1568 }
1569 // Set handler under SignatureHandlerLibrary_lock
1570 if (handler_index < 0) {
1571 // use generic signature handler
1572 method->set_signature_handler(Interpreter::slow_signature_handler());
1573 } else {
1574 // set handler
1575 method->set_signature_handler(_handlers->at(handler_index));
1576 }
1577 } else {
1578 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1579 // use generic signature handler
1580 method->set_signature_handler(Interpreter::slow_signature_handler());
1581 }
1582 }
1583 #ifdef ASSERT
1584 int handler_index = -1;
1585 int fingerprint_index = -2;
1586 {
1587 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1588 // in any way if accessed from multiple threads. To avoid races with another
1589 // thread which may change the arrays in the above, mutex protected block, we
1590 // have to protect this read access here with the same mutex as well!
1591 MutexLocker mu(SignatureHandlerLibrary_lock);
1592 if (_handlers != nullptr) {
1593 handler_index = _handlers->find(method->signature_handler());
1594 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1595 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1596 fingerprint_index = _fingerprints->find(fingerprint);
1597 }
1598 }
1599 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1600 handler_index == fingerprint_index, "sanity check");
1601 #endif // ASSERT
1602 }
1603
1604 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1605 int handler_index = -1;
1606 // use customized signature handler
1607 MutexLocker mu(SignatureHandlerLibrary_lock);
1608 // make sure data structure is initialized
1609 initialize();
1610 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1611 handler_index = _fingerprints->find(fingerprint);
1612 // create handler if necessary
1613 if (handler_index < 0) {
1614 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1615 tty->cr();
1616 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1617 _handlers->length(),
1618 p2i(handler),
1619 fingerprint);
1620 }
1621 _fingerprints->append(fingerprint);
1622 _handlers->append(handler);
1623 } else {
1624 if (PrintSignatureHandlers) {
1625 tty->cr();
1626 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1627 _handlers->length(),
1628 fingerprint,
1629 p2i(_handlers->at(handler_index)),
1630 p2i(handler));
1631 }
1632 }
1633 }
1634
1635
1636 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1637 address SignatureHandlerLibrary::_handler = nullptr;
1638 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1639 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1640 address SignatureHandlerLibrary::_buffer = nullptr;
1641
1642
1643 JRT_ENTRY_PROF(void, InterpreterRuntime, prepare_native_call, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1644 methodHandle m(current, method);
1645 assert(m->is_native(), "sanity check");
1646 // lookup native function entry point if it doesn't exist
1647 if (!m->has_native_function()) {
1648 NativeLookup::lookup(m, CHECK);
1649 }
1650 // make sure signature handler is installed
1651 SignatureHandlerLibrary::add(m);
1652 // The interpreter entry point checks the signature handler first,
1653 // before trying to fetch the native entry point and klass mirror.
1654 // We must set the signature handler last, so that multiple processors
1655 // preparing the same method will be sure to see non-null entry & mirror.
1656 JRT_END
1657
1658 #if defined(IA32) || defined(AMD64) || defined(ARM)
1659 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1660 assert(current == JavaThread::current(), "pre-condition");
1661 if (src_address == dest_address) {
1662 return;
1663 }
1664 ResourceMark rm;
1665 LastFrameAccessor last_frame(current);
1666 assert(last_frame.is_interpreted_frame(), "");
1667 jint bci = last_frame.bci();
1668 methodHandle mh(current, last_frame.method());
1669 Bytecode_invoke invoke(mh, bci);
1670 ArgumentSizeComputer asc(invoke.signature());
1671 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1672 Copy::conjoint_jbytes(src_address, dest_address,
1673 size_of_arguments * Interpreter::stackElementSize);
1674 JRT_END
1675 #endif
1676
1677 #if INCLUDE_JVMTI
1678 // This is a support of the JVMTI PopFrame interface.
1679 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1680 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1681 // The member_name argument is a saved reference (in local#0) to the member_name.
1682 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1683 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1684 JRT_ENTRY_PROF(void, InterpreterRuntime, member_name_arg_or_null,
1685 InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1686 Method* method, address bcp))
1687 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1688 if (code != Bytecodes::_invokestatic) {
1689 return;
1690 }
1691 ConstantPool* cpool = method->constants();
1692 int cp_index = Bytes::get_native_u2(bcp + 1);
1693 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1694 Symbol* mname = cpool->name_ref_at(cp_index, code);
1695
1696 if (MethodHandles::has_member_arg(cname, mname)) {
1697 oop member_name_oop = cast_to_oop(member_name);
1698 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1699 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1700 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1701 }
1702 current->set_vm_result(member_name_oop);
1703 } else {
1704 current->set_vm_result(nullptr);
1705 }
1706 JRT_END
1707 #endif // INCLUDE_JVMTI
1708
1709 #ifndef PRODUCT
1710 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1711 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1712 // The generated code still uses call_VM because that will set up the frame pointer for
1713 // bcp and method.
1714 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1715 assert(current == JavaThread::current(), "pre-condition");
1716 LastFrameAccessor last_frame(current);
1717 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1718 methodHandle mh(current, last_frame.method());
1719 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1720 return preserve_this_value;
1721 JRT_END
1722 #endif // !PRODUCT
1723
1724 #define DO_COUNTERS(macro) \
1725 macro(InterpreterRuntime, ldc) \
1726 macro(InterpreterRuntime, resolve_ldc) \
1727 macro(InterpreterRuntime, new) \
1728 macro(InterpreterRuntime, newarray) \
1729 macro(InterpreterRuntime, anewarray) \
1730 macro(InterpreterRuntime, multianewarray) \
1731 macro(InterpreterRuntime, register_finalizer) \
1732 macro(InterpreterRuntime, quicken_io_cc) \
1733 macro(InterpreterRuntime, throw_StackOverflowError) \
1734 macro(InterpreterRuntime, throw_delayed_StackOverflowError) \
1735 macro(InterpreterRuntime, create_exception) \
1736 macro(InterpreterRuntime, create_klass_exception) \
1737 macro(InterpreterRuntime, throw_ArrayIndexOutOfBoundsException) \
1738 macro(InterpreterRuntime, throw_ClassCastException) \
1739 macro(InterpreterRuntime, exception_handler_for_exception) \
1740 macro(InterpreterRuntime, throw_pending_exception) \
1741 macro(InterpreterRuntime, throw_AbstractMethodError) \
1742 macro(InterpreterRuntime, throw_AbstractMethodErrorWithMethod) \
1743 macro(InterpreterRuntime, throw_AbstractMethodErrorVerbose) \
1744 macro(InterpreterRuntime, throw_IncompatibleClassChangeError) \
1745 macro(InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose) \
1746 macro(InterpreterRuntime, throw_NullPointerException) \
1747 macro(InterpreterRuntime, monitorenter) \
1748 macro(InterpreterRuntime, monitorexit) \
1749 macro(InterpreterRuntime, throw_illegal_monitor_state_exception) \
1750 macro(InterpreterRuntime, new_illegal_monitor_state_exception) \
1751 macro(InterpreterRuntime, get_original_bytecode_at) \
1752 macro(InterpreterRuntime, set_original_bytecode_at) \
1753 macro(InterpreterRuntime, breakpoint) \
1754 macro(InterpreterRuntime, resolve_getfield) \
1755 macro(InterpreterRuntime, resolve_putfield) \
1756 macro(InterpreterRuntime, resolve_getstatic) \
1757 macro(InterpreterRuntime, resolve_putstatic) \
1758 macro(InterpreterRuntime, resolve_invokevirtual) \
1759 macro(InterpreterRuntime, resolve_invokespecial) \
1760 macro(InterpreterRuntime, resolve_invokestatic) \
1761 macro(InterpreterRuntime, resolve_invokeinterface) \
1762 macro(InterpreterRuntime, resolve_invokehandle) \
1763 macro(InterpreterRuntime, resolve_invokedynamic) \
1764 macro(InterpreterRuntime, frequency_counter_overflow) \
1765 macro(InterpreterRuntime, bcp_to_di) \
1766 macro(InterpreterRuntime, update_mdp_for_ret) \
1767 macro(InterpreterRuntime, build_method_counters) \
1768 macro(InterpreterRuntime, at_safepoint) \
1769 macro(InterpreterRuntime, at_unwind) \
1770 macro(InterpreterRuntime, post_field_access) \
1771 macro(InterpreterRuntime, post_field_modification) \
1772 macro(InterpreterRuntime, post_method_entry) \
1773 macro(InterpreterRuntime, post_method_exit) \
1774 macro(InterpreterRuntime, interpreter_contains) \
1775 macro(InterpreterRuntime, prepare_native_call)
1776
1777 #if INCLUDE_JVMTI
1778 #define DO_JVMTI_COUNTERS(macro) \
1779 macro(InterpreterRuntime, member_name_arg_or_null)
1780 #else
1781 #define DO_JVMTI_COUNTERS(macro)
1782 #endif /* INCLUDE_JVMTI */
1783
1784 #define INIT_COUNTER(sub, name) \
1785 NEWPERFTICKCOUNTERS(_perf_##sub##_##name##_timer, SUN_CI, #sub "::" #name); \
1786 NEWPERFEVENTCOUNTER(_perf_##sub##_##name##_count, SUN_CI, #sub "::" #name "_count");
1787
1788 void InterpreterRuntime::init_counters() {
1789 if (UsePerfData) {
1790 EXCEPTION_MARK;
1791
1792 DO_COUNTERS(INIT_COUNTER)
1793 DO_JVMTI_COUNTERS(INIT_COUNTER)
1794
1795 if (HAS_PENDING_EXCEPTION) {
1796 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
1797 }
1798 }
1799 }
1800 #undef INIT_COUNTER
1801
1802 #define PRINT_COUNTER(sub, name) { \
1803 jlong count = _perf_##sub##_##name##_count->get_value(); \
1804 if (count > 0) { \
1805 st->print_cr(" %-50s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
1806 #sub "::" #name, \
1807 _perf_##sub##_##name##_timer->elapsed_counter_value_us(), \
1808 _perf_##sub##_##name##_timer->thread_counter_value_us(), \
1809 count); \
1810 }}
1811
1812 void InterpreterRuntime::print_counters_on(outputStream* st) {
1813 if (UsePerfData && ProfileRuntimeCalls) {
1814 DO_COUNTERS(PRINT_COUNTER)
1815 DO_JVMTI_COUNTERS(PRINT_COUNTER)
1816 } else {
1817 st->print_cr(" InterpreterRuntime: no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
1818 }
1819 }
1820
1821 #undef PRINT_COUNTER
1822 #undef DO_JVMTI_COUNTERS
1823 #undef DO_COUNTERS
1824