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
83 // Helper class to access current interpreter state
84 class LastFrameAccessor : public StackObj {
85 frame _last_frame;
86 public:
87 LastFrameAccessor(JavaThread* current) {
88 assert(current == Thread::current(), "sanity");
89 _last_frame = current->last_frame();
90 }
91 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
92 Method* method() const { return _last_frame.interpreter_frame_method(); }
93 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
94 int bci() const { return _last_frame.interpreter_frame_bci(); }
95 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
96
97 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
98 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
99
100 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
101 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
102
103 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
104 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
105 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
106 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
107 int number_of_dimensions() const { return bcp()[3]; }
108
109 oop callee_receiver(Symbol* signature) {
110 return _last_frame.interpreter_callee_receiver(signature);
111 }
112 BasicObjectLock* monitor_begin() const {
113 return _last_frame.interpreter_frame_monitor_begin();
114 }
115 BasicObjectLock* monitor_end() const {
116 return _last_frame.interpreter_frame_monitor_end();
117 }
118 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
119 return _last_frame.next_monitor_in_interpreter_frame(current);
120 }
121
122 frame& get_frame() { return _last_frame; }
123 };
124
125 static bool is_resolved(JavaThread* current) {
126 LastFrameAccessor last_frame(current);
127 ConstantPool* constants = last_frame.method()->constants();
128 Bytecodes::Code bc = last_frame.code();
129
130 if (bc == Bytecodes::_ldc || bc == Bytecodes::_ldc_w || bc == Bytecodes::_ldc2_w ||
131 bc == Bytecodes::_fast_aldc || bc == Bytecodes::_fast_aldc_w) {
132 bool is_wide = (bc != Bytecodes::_ldc) && (bc != Bytecodes::_fast_aldc);
133 int index = (is_wide ? last_frame.get_index_u1(bc) : last_frame.get_index_u2(bc));
134 constantTag tag = constants->tag_at(index);
135 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
136 return constants->tag_at(index).is_klass();
137 } else if (bc == Bytecodes::_invokedynamic) {
138 int index = last_frame.get_index_u4(bc);
139 int indy_index = index;
140 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
141 return indy_entry->is_resolved();
142 } else if (Bytecodes::is_invoke(bc)) {
143 int index = last_frame.get_index_u2(bc);
144 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
145 return rme->is_resolved(bc);
146 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
147 if (bc == Bytecodes::_nofast_getfield) {
148 bc = Bytecodes::_getfield;
149 } else if (bc == Bytecodes::_nofast_putfield) {
150 bc = Bytecodes::_putfield;
151 }
152 int index = last_frame.get_index_u2(bc);
153 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
154 return field_entry->is_resolved(bc);
155 } else if (bc == Bytecodes::_new) {
156 int index = last_frame.get_index_u2(bc);
157 constantTag tag = constants->tag_at(index);
158 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
159 return constants->tag_at(index).is_klass();
160 }
161 return false;
162 }
163
164 static void trace_current_location(JavaThread* current) {
165 LogStreamHandle(Debug, init, interpreter) log;
166 if (current->profile_rt_calls() && log.is_enabled()) {
167 ResourceMark rm(current);
168 LastFrameAccessor last_frame(current);
169 Method* caller = last_frame.method();
170 ConstantPool* constants = caller->constants();
171 Bytecodes::Code bc = last_frame.code();
172 log.print("InterpreterRuntime: " INTPTR_FORMAT ": %s: " INTPTR_FORMAT,
173 p2i(current), Bytecodes::name(bc), p2i(caller));
174 if (caller->is_shared()) {
175 log.print(" shared");
176 }
177 if (is_resolved(current)) {
178 log.print(" resolved");
179 }
180 log.print(" ");
181 caller->print_short_name(&log);
182 log.print(" @ %d:", last_frame.bci());
183 int instruction_size = last_frame.bytecode().instruction_size();
184
185 if (Bytecodes::is_invoke(bc) && bc != Bytecodes::_invokedynamic) {
186 int index = last_frame.get_index_u2(bc);
187 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
188 if (rme->is_resolved(bc)) {
189 Method* m = rme->method();
190 if (m != nullptr) {
191 log.print(" %s", m->method_holder()->init_state_name());
192 } else {
193 log.print(" null");
194 }
195 }
196 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
197 if (bc == Bytecodes::_nofast_getfield) {
198 bc = Bytecodes::_getfield;
199 } else if (bc == Bytecodes::_nofast_putfield) {
200 bc = Bytecodes::_putfield;
201 }
202 int index = last_frame.get_index_u2(bc);
203 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
204
205 if (field_entry->is_resolved(bc)) {
206 log.print(" %s", field_entry->field_holder()->init_state_name());
207 }
208 } else if (bc == Bytecodes::_new) {
209 int index = last_frame.get_index_u2(bc);
210 constantTag tag = constants->tag_at(index);
211 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
212 if (constants->tag_at(index).is_klass()) {
213 CPKlassSlot kslot = constants->klass_slot_at(index);
214 int resolved_klass_index = kslot.resolved_klass_index();
215 Klass* k = constants->resolved_klasses()->at(resolved_klass_index);
216 log.print(": %s", InstanceKlass::cast(k)->init_state_name());
217 }
218 }
219 log.print(" ");
220 caller->print_codes_on(last_frame.bci(), last_frame.bci() + instruction_size, &log, /*flags*/ 0);
221
222 LogStreamHandle(Trace, init, interpreter) log1;
223 if (log1.is_enabled()) {
224 if (bc == Bytecodes::_invokedynamic) {
225 int index = last_frame.get_index_u4(bc);
226 int indy_index = index;
227 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
228 indy_entry->print_on(&log1);
229 } else if (Bytecodes::is_invoke(bc)) {
230 int index = last_frame.get_index_u2(bc);
231 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
232 rme->print_on(&log1);
233 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
234 int index = last_frame.get_index_u2(bc);
235 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
236 field_entry->print_on(&log1);
237 }
238 }
239 }
240 }
241
242 //------------------------------------------------------------------------------------------------------------------------
243 // State accessors
244
245 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
246 LastFrameAccessor last_frame(current);
247 last_frame.set_bcp(bcp);
248 if (ProfileInterpreter) {
249 // ProfileTraps uses MDOs independently of ProfileInterpreter.
250 // That is why we must check both ProfileInterpreter and mdo != nullptr.
251 MethodData* mdo = last_frame.method()->method_data();
252 if (mdo != nullptr) {
253 NEEDS_CLEANUP;
254 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
255 }
256 }
257 }
258
259 //------------------------------------------------------------------------------------------------------------------------
260 // Constants
261
262
263 JRT_ENTRY_PROF(void, InterpreterRuntime, ldc, InterpreterRuntime::ldc(JavaThread* current, bool wide))
264 // access constant pool
265 LastFrameAccessor last_frame(current);
266 ConstantPool* pool = last_frame.method()->constants();
267 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
268 constantTag tag = pool->tag_at(cp_index);
269
270 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
271 Klass* klass = pool->klass_at(cp_index, CHECK);
272 oop java_class = klass->java_mirror();
273 current->set_vm_result(java_class);
274 JRT_END
275
276 JRT_ENTRY_PROF(void, InterpreterRuntime, resolve_ldc, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
277 assert(bytecode == Bytecodes::_ldc ||
278 bytecode == Bytecodes::_ldc_w ||
279 bytecode == Bytecodes::_ldc2_w ||
280 bytecode == Bytecodes::_fast_aldc ||
281 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
282 ResourceMark rm(current);
283 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
284 bytecode == Bytecodes::_fast_aldc_w);
285 LastFrameAccessor last_frame(current);
286 methodHandle m (current, last_frame.method());
287 Bytecode_loadconstant ldc(m, last_frame.bci());
288
289 // Double-check the size. (Condy can have any type.)
290 BasicType type = ldc.result_type();
291 switch (type2size[type]) {
292 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
293 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
294 default: ShouldNotReachHere();
295 }
296
297 // Resolve the constant. This does not do unboxing.
298 // But it does replace Universe::the_null_sentinel by null.
299 oop result = ldc.resolve_constant(CHECK);
300 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
301
302 #ifdef ASSERT
303 {
304 // The bytecode wrappers aren't GC-safe so construct a new one
305 Bytecode_loadconstant ldc2(m, last_frame.bci());
306 int rindex = ldc2.cache_index();
307 if (rindex < 0)
308 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
309 if (rindex >= 0) {
310 oop coop = m->constants()->resolved_reference_at(rindex);
311 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
312 assert(roop == coop, "expected result for assembly code");
313 }
314 }
315 #endif
316 current->set_vm_result(result);
317 if (!is_fast_aldc) {
318 // Tell the interpreter how to unbox the primitive.
319 guarantee(java_lang_boxing_object::is_instance(result, type), "");
320 int offset = java_lang_boxing_object::value_offset(type);
321 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
322 | (offset & ConstantPoolCache::field_index_mask));
323 current->set_vm_result_2((Metadata*)flags);
324 }
325 }
326 JRT_END
327
328
329 //------------------------------------------------------------------------------------------------------------------------
330 // Allocation
331
332 JRT_ENTRY_PROF(void, InterpreterRuntime, new, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
333 Klass* k = pool->klass_at(index, CHECK);
334 InstanceKlass* klass = InstanceKlass::cast(k);
335
336 // Make sure we are not instantiating an abstract klass
337 klass->check_valid_for_instantiation(true, CHECK);
338
339 // Make sure klass is initialized
340 klass->initialize(CHECK);
341
342 oop obj = klass->allocate_instance(CHECK);
343 current->set_vm_result(obj);
344 JRT_END
345
346
347 JRT_ENTRY_PROF(void, InterpreterRuntime, newarray, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
348 oop obj = oopFactory::new_typeArray(type, size, CHECK);
349 current->set_vm_result(obj);
350 JRT_END
351
352
353 JRT_ENTRY_PROF(void, InterpreterRuntime, anewarray, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
354 Klass* klass = pool->klass_at(index, CHECK);
355 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
356 current->set_vm_result(obj);
357 JRT_END
358
359
360 JRT_ENTRY_PROF(void, InterpreterRuntime, multianewarray, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
361 // We may want to pass in more arguments - could make this slightly faster
362 LastFrameAccessor last_frame(current);
363 ConstantPool* constants = last_frame.method()->constants();
364 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
365 Klass* klass = constants->klass_at(i, CHECK);
366 int nof_dims = last_frame.number_of_dimensions();
367 assert(klass->is_klass(), "not a class");
368 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
369
370 // We must create an array of jints to pass to multi_allocate.
371 ResourceMark rm(current);
372 const int small_dims = 10;
373 jint dim_array[small_dims];
374 jint *dims = &dim_array[0];
375 if (nof_dims > small_dims) {
376 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
377 }
378 for (int index = 0; index < nof_dims; index++) {
379 // offset from first_size_address is addressed as local[index]
380 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
381 dims[index] = first_size_address[n];
382 }
383 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
384 current->set_vm_result(obj);
385 JRT_END
386
387
388 JRT_ENTRY_PROF(void, InterpreterRuntime, register_finalizer, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
389 assert(oopDesc::is_oop(obj), "must be a valid oop");
390 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
391 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
392 JRT_END
393
394
395 // Quicken instance-of and check-cast bytecodes
396 JRT_ENTRY_PROF(void, InterpreterRuntime, quicken_io_cc, InterpreterRuntime::quicken_io_cc(JavaThread* current))
397 // Force resolving; quicken the bytecode
398 LastFrameAccessor last_frame(current);
399 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
400 ConstantPool* cpool = last_frame.method()->constants();
401 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
402 // program we might have seen an unquick'd bytecode in the interpreter but have another
403 // thread quicken the bytecode before we get here.
404 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
405 Klass* klass = cpool->klass_at(which, CHECK);
406 current->set_vm_result_2(klass);
407 JRT_END
408
409
410 //------------------------------------------------------------------------------------------------------------------------
411 // Exceptions
412
413 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
414 const methodHandle& trap_method, int trap_bci) {
415 if (trap_method.not_null()) {
416 MethodData* trap_mdo = trap_method->method_data();
417 if (trap_mdo == nullptr) {
418 ExceptionMark em(current);
419 JavaThread* THREAD = current; // For exception macros.
420 Method::build_profiling_method_data(trap_method, THREAD);
421 if (HAS_PENDING_EXCEPTION) {
422 // Only metaspace OOM is expected. No Java code executed.
423 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
424 "we expect only an OOM error here");
425 CLEAR_PENDING_EXCEPTION;
426 }
427 trap_mdo = trap_method->method_data();
428 // and fall through...
429 }
430 if (trap_mdo != nullptr) {
431 // Update per-method count of trap events. The interpreter
432 // is updating the MDO to simulate the effect of compiler traps.
433 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
434 }
435 }
436 }
437
438 // Assume the compiler is (or will be) interested in this event.
439 // If necessary, create an MDO to hold the information, and record it.
440 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
441 assert(ProfileTraps, "call me only if profiling");
442 LastFrameAccessor last_frame(current);
443 methodHandle trap_method(current, last_frame.method());
444 int trap_bci = trap_method->bci_from(last_frame.bcp());
445 note_trap_inner(current, reason, trap_method, trap_bci);
446 }
447
448 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
449 // get klass
450 InstanceKlass* klass = InstanceKlass::cast(k);
451 assert(klass->is_initialized(),
452 "this klass should have been initialized during VM initialization");
453 // create instance - do not call constructor since we may have no
454 // (java) stack space left (should assert constructor is empty)
455 Handle exception;
456 oop exception_oop = klass->allocate_instance(CHECK_(exception));
457 exception = Handle(THREAD, exception_oop);
458 if (StackTraceInThrowable) {
459 java_lang_Throwable::fill_in_stack_trace(exception);
460 }
461 return exception;
462 }
463
464 // Special handling for stack overflow: since we don't have any (java) stack
465 // space left we use the pre-allocated & pre-initialized StackOverflowError
466 // klass to create an stack overflow error instance. We do not call its
467 // constructor for the same reason (it is empty, anyway).
468 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_StackOverflowError,
469 InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
470 Handle exception = get_preinitialized_exception(
471 vmClasses::StackOverflowError_klass(),
472 CHECK);
473 // Increment counter for hs_err file reporting
474 Atomic::inc(&Exceptions::_stack_overflow_errors);
475 // Remove the ScopedValue bindings in case we got a StackOverflowError
476 // while we were trying to manipulate ScopedValue bindings.
477 current->clear_scopedValueBindings();
478 THROW_HANDLE(exception);
479 JRT_END
480
481 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_delayed_StackOverflowError,
482 InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
483 Handle exception = get_preinitialized_exception(
484 vmClasses::StackOverflowError_klass(),
485 CHECK);
486 java_lang_Throwable::set_message(exception(),
487 Universe::delayed_stack_overflow_error_message());
488 // Increment counter for hs_err file reporting
489 Atomic::inc(&Exceptions::_stack_overflow_errors);
490 // Remove the ScopedValue bindings in case we got a StackOverflowError
491 // while we were trying to manipulate ScopedValue bindings.
492 current->clear_scopedValueBindings();
493 THROW_HANDLE(exception);
494 JRT_END
495
496 JRT_ENTRY_PROF(void, InterpreterRuntime, create_exception,
497 InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
498 // lookup exception klass
499 TempNewSymbol s = SymbolTable::new_symbol(name);
500 if (ProfileTraps) {
501 if (s == vmSymbols::java_lang_ArithmeticException()) {
502 note_trap(current, Deoptimization::Reason_div0_check);
503 } else if (s == vmSymbols::java_lang_NullPointerException()) {
504 note_trap(current, Deoptimization::Reason_null_check);
505 }
506 }
507 // create exception
508 Handle exception = Exceptions::new_exception(current, s, message);
509 current->set_vm_result(exception());
510 JRT_END
511
512
513 JRT_ENTRY_PROF(void, InterpreterRuntime, create_klass_exception,
514 InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
515 // Produce the error message first because note_trap can safepoint
516 ResourceMark rm(current);
517 const char* klass_name = obj->klass()->external_name();
518 // lookup exception klass
519 TempNewSymbol s = SymbolTable::new_symbol(name);
520 if (ProfileTraps) {
521 if (s == vmSymbols::java_lang_ArrayStoreException()) {
522 note_trap(current, Deoptimization::Reason_array_check);
523 } else {
524 note_trap(current, Deoptimization::Reason_class_check);
525 }
526 }
527 // create exception, with klass name as detail message
528 Handle exception = Exceptions::new_exception(current, s, klass_name);
529 current->set_vm_result(exception());
530 JRT_END
531
532 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ArrayIndexOutOfBoundsException,
533 InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
534 // Produce the error message first because note_trap can safepoint
535 ResourceMark rm(current);
536 stringStream ss;
537 ss.print("Index %d out of bounds for length %d", index, a->length());
538
539 if (ProfileTraps) {
540 note_trap(current, Deoptimization::Reason_range_check);
541 }
542
543 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
544 JRT_END
545
546 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ClassCastException,
547 InterpreterRuntime::throw_ClassCastException(
548 JavaThread* current, oopDesc* obj))
549
550 // Produce the error message first because note_trap can safepoint
551 ResourceMark rm(current);
552 char* message = SharedRuntime::generate_class_cast_message(
553 current, obj->klass());
554
555 if (ProfileTraps) {
556 note_trap(current, Deoptimization::Reason_class_check);
557 }
558
559 // create exception
560 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
561 JRT_END
562
563 // exception_handler_for_exception(...) returns the continuation address,
564 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
565 // The exception oop is returned to make sure it is preserved over GC (it
566 // is only on the stack if the exception was thrown explicitly via athrow).
567 // During this operation, the expression stack contains the values for the
568 // bci where the exception happened. If the exception was propagated back
569 // from a call, the expression stack contains the values for the bci at the
570 // invoke w/o arguments (i.e., as if one were inside the call).
571 // Note that the implementation of this method assumes it's only called when an exception has actually occured
572 JRT_ENTRY_PROF(address, InterpreterRuntime, exception_handler_for_exception,
573 InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
574 // We get here after we have unwound from a callee throwing an exception
575 // into the interpreter. Any deferred stack processing is notified of
576 // the event via the StackWatermarkSet.
577 StackWatermarkSet::after_unwind(current);
578
579 LastFrameAccessor last_frame(current);
580 Handle h_exception(current, exception);
581 methodHandle h_method (current, last_frame.method());
582 constantPoolHandle h_constants(current, h_method->constants());
583 bool should_repeat;
584 int handler_bci;
585 int current_bci = last_frame.bci();
586
587 if (current->frames_to_pop_failed_realloc() > 0) {
588 // Allocation of scalar replaced object used in this frame
589 // failed. Unconditionally pop the frame.
590 current->dec_frames_to_pop_failed_realloc();
591 current->set_vm_result(h_exception());
592 // If the method is synchronized we already unlocked the monitor
593 // during deoptimization so the interpreter needs to skip it when
594 // the frame is popped.
595 current->set_do_not_unlock_if_synchronized(true);
596 return Interpreter::remove_activation_entry();
597 }
598
599 // Need to do this check first since when _do_not_unlock_if_synchronized
600 // is set, we don't want to trigger any classloading which may make calls
601 // into java, or surprisingly find a matching exception handler for bci 0
602 // since at this moment the method hasn't been "officially" entered yet.
603 if (current->do_not_unlock_if_synchronized()) {
604 ResourceMark rm;
605 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
606 current->set_vm_result(exception);
607 return Interpreter::remove_activation_entry();
608 }
609
610 do {
611 should_repeat = false;
612
613 // assertions
614 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
615 // Check that exception is a subclass of Throwable.
616 assert(h_exception->is_a(vmClasses::Throwable_klass()),
617 "Exception not subclass of Throwable");
618
619 // tracing
620 if (log_is_enabled(Info, exceptions)) {
621 ResourceMark rm(current);
622 stringStream tempst;
623 tempst.print("interpreter method <%s>\n"
624 " at bci %d for thread " INTPTR_FORMAT " (%s)",
625 h_method->print_value_string(), current_bci, p2i(current), current->name());
626 Exceptions::log_exception(h_exception, tempst.as_string());
627 }
628 // Don't go paging in something which won't be used.
629 // else if (extable->length() == 0) {
630 // // disabled for now - interpreter is not using shortcut yet
631 // // (shortcut is not to call runtime if we have no exception handlers)
632 // // warning("performance bug: should not call runtime if method has no exception handlers");
633 // }
634 // for AbortVMOnException flag
635 Exceptions::debug_check_abort(h_exception);
636
637 // exception handler lookup
638 Klass* klass = h_exception->klass();
639 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
640 if (HAS_PENDING_EXCEPTION) {
641 // We threw an exception while trying to find the exception handler.
642 // Transfer the new exception to the exception handle which will
643 // be set into thread local storage, and do another lookup for an
644 // exception handler for this exception, this time starting at the
645 // BCI of the exception handler which caused the exception to be
646 // thrown (bug 4307310).
647 h_exception = Handle(THREAD, PENDING_EXCEPTION);
648 CLEAR_PENDING_EXCEPTION;
649 if (handler_bci >= 0) {
650 current_bci = handler_bci;
651 should_repeat = true;
652 }
653 }
654 } while (should_repeat == true);
655
656 #if INCLUDE_JVMCI
657 if (EnableJVMCI && h_method->method_data() != nullptr) {
658 ResourceMark rm(current);
659 MethodData* mdo = h_method->method_data();
660
661 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
662 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
663
664 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
665 if (pdata != nullptr && pdata->is_BitData()) {
666 BitData* bit_data = (BitData*) pdata;
667 bit_data->set_exception_seen();
668 }
669 }
670 #endif
671
672 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
673 // time throw or a stack unwinding throw and accordingly notify the debugger
674 if (JvmtiExport::can_post_on_exceptions()) {
675 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
676 }
677
678 address continuation = nullptr;
679 address handler_pc = nullptr;
680 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
681 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
682 // handler in this method, or (b) after a stack overflow there is not yet
683 // enough stack space available to reprotect the stack.
684 continuation = Interpreter::remove_activation_entry();
685 #if COMPILER2_OR_JVMCI
686 // Count this for compilation purposes
687 h_method->interpreter_throwout_increment(THREAD);
688 #endif
689 } else {
690 // handler in this method => change bci/bcp to handler bci/bcp and continue there
691 handler_pc = h_method->code_base() + handler_bci;
692 h_method->set_exception_handler_entered(handler_bci); // profiling
693 #ifndef ZERO
694 set_bcp_and_mdp(handler_pc, current);
695 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
696 #else
697 continuation = (address)(intptr_t) handler_bci;
698 #endif
699 }
700
701 // notify debugger of an exception catch
702 // (this is good for exceptions caught in native methods as well)
703 if (JvmtiExport::can_post_on_exceptions()) {
704 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
705 }
706
707 current->set_vm_result(h_exception());
708 return continuation;
709 JRT_END
710
711
712 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_pending_exception, InterpreterRuntime::throw_pending_exception(JavaThread* current))
713 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
714 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
715 JRT_END
716
717
718 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodError, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
719 THROW(vmSymbols::java_lang_AbstractMethodError());
720 JRT_END
721
722 // This method is called from the "abstract_entry" of the interpreter.
723 // At that point, the arguments have already been removed from the stack
724 // and therefore we don't have the receiver object at our fingertips. (Though,
725 // on some platforms the receiver still resides in a register...). Thus,
726 // we have no choice but print an error message not containing the receiver
727 // type.
728 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorWithMethod,
729 InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
730 Method* missingMethod))
731 ResourceMark rm(current);
732 assert(missingMethod != nullptr, "sanity");
733 methodHandle m(current, missingMethod);
734 LinkResolver::throw_abstract_method_error(m, THREAD);
735 JRT_END
736
737 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorVerbose,
738 InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
739 Klass* recvKlass,
740 Method* missingMethod))
741 ResourceMark rm(current);
742 methodHandle mh = methodHandle(current, missingMethod);
743 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
744 JRT_END
745
746
747 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeError,
748 InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
749 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
750 JRT_END
751
752 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose,
753 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
754 Klass* recvKlass,
755 Klass* interfaceKlass))
756 ResourceMark rm(current);
757 char buf[1000];
758 buf[0] = '\0';
759 jio_snprintf(buf, sizeof(buf),
760 "Class %s does not implement the requested interface %s",
761 recvKlass ? recvKlass->external_name() : "nullptr",
762 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
763 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
764 JRT_END
765
766 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_NullPointerException,
767 InterpreterRuntime::throw_NullPointerException(JavaThread* current))
768 THROW(vmSymbols::java_lang_NullPointerException());
769 JRT_END
770
771 //------------------------------------------------------------------------------------------------------------------------
772 // Fields
773 //
774
775 PROF_ENTRY(void, InterpreterRuntime, resolve_getfield, InterpreterRuntime::resolve_getfield(JavaThread* current))
776 resolve_get_put(current, Bytecodes::_getfield);
777 PROF_END
778
779 PROF_ENTRY(void, InterpreterRuntime, resolve_putfield, InterpreterRuntime::resolve_putfield(JavaThread* current))
780 resolve_get_put(current, Bytecodes::_putfield);
781 PROF_END
782
783 PROF_ENTRY(void, InterpreterRuntime, resolve_getstatic, InterpreterRuntime::resolve_getstatic(JavaThread* current))
784 resolve_get_put(current, Bytecodes::_getstatic);
785 PROF_END
786
787 PROF_ENTRY(void, InterpreterRuntime, resolve_putstatic, InterpreterRuntime::resolve_putstatic(JavaThread* current))
788 resolve_get_put(current, Bytecodes::_putstatic);
789 PROF_END
790
791 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
792 LastFrameAccessor last_frame(current);
793 constantPoolHandle pool(current, last_frame.method()->constants());
794 methodHandle m(current, last_frame.method());
795
796 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
797 }
798
799 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
800 methodHandle& m,
801 constantPoolHandle& pool,
802 bool initialize_holder, TRAPS) {
803 fieldDescriptor info;
804 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
805 bytecode == Bytecodes::_putstatic);
806 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
807
808 {
809 JvmtiHideSingleStepping jhss(THREAD);
810 LinkResolver::resolve_field_access(info, pool, field_index,
811 m, bytecode, initialize_holder, CHECK);
812 } // end JvmtiHideSingleStepping
813
814 // check if link resolution caused cpCache to be updated
815 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
816
817 // compute auxiliary field attributes
818 TosState state = as_TosState(info.field_type());
819
820 // Resolution of put instructions on final fields is delayed. That is required so that
821 // exceptions are thrown at the correct place (when the instruction is actually invoked).
822 // If we do not resolve an instruction in the current pass, leaving the put_code
823 // set to zero will cause the next put instruction to the same field to reresolve.
824
825 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
826 // to final instance fields with updates originating from a method different than <init>)
827 // is inhibited. A putfield instruction targeting an instance final field must throw
828 // an IllegalAccessError if the instruction is not in an instance
829 // initializer method <init>. If resolution were not inhibited, a putfield
830 // in an initializer method could be resolved in the initializer. Subsequent
831 // putfield instructions to the same field would then use cached information.
832 // As a result, those instructions would not pass through the VM. That is,
833 // checks in resolve_field_access() would not be executed for those instructions
834 // and the required IllegalAccessError would not be thrown.
835 //
836 // Also, we need to delay resolving getstatic and putstatic instructions until the
837 // class is initialized. This is required so that access to the static
838 // field will call the initialization function every time until the class
839 // is completely initialized ala. in 2.17.5 in JVM Specification.
840 InstanceKlass* klass = info.field_holder();
841 bool uninitialized_static = is_static && !klass->is_initialized();
842 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
843 info.has_initialized_final_update();
844 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
845
846 Bytecodes::Code get_code = (Bytecodes::Code)0;
847 Bytecodes::Code put_code = (Bytecodes::Code)0;
848 if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) {
849 #if !defined(X86) && !defined(AARCH64)
850 guarantee(!uninitialized_static, "fast class init checks missing in interpreter"); // FIXME
851 #endif // !X86 && !AARCH64
852 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
853 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
854 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
855 }
856 }
857
858 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
859 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
860 entry->fill_in(info.field_holder(), info.offset(),
861 checked_cast<u2>(info.index()), 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());
922 assert(exception() != nullptr, "vm result should be set");
923 current->set_vm_result(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(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(current, Bytecodes::_invokevirtual);
946 PROF_END
947
948 PROF_ENTRY(void, InterpreterRuntime, resolve_invokespecial, InterpreterRuntime::resolve_invokespecial(JavaThread* current))
949 resolve_invoke(current, Bytecodes::_invokespecial);
950 PROF_END
951
952 PROF_ENTRY(void, InterpreterRuntime, resolve_invokestatic, InterpreterRuntime::resolve_invokestatic(JavaThread* current))
953 resolve_invoke(current, Bytecodes::_invokestatic);
954 PROF_END
955
956 PROF_ENTRY(void, InterpreterRuntime, resolve_invokeinterface, InterpreterRuntime::resolve_invokeinterface(JavaThread* current))
957 resolve_invoke(current, Bytecodes::_invokeinterface);
958 PROF_END
959
960 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
961 LastFrameAccessor last_frame(current);
962 // extract receiver from the outgoing argument list if necessary
963 Handle receiver(current, nullptr);
964 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
965 bytecode == Bytecodes::_invokespecial) {
966 ResourceMark rm(current);
967 methodHandle m (current, last_frame.method());
968 Bytecode_invoke call(m, last_frame.bci());
969 Symbol* signature = call.signature();
970 receiver = Handle(current, last_frame.callee_receiver(signature));
971
972 assert(Universe::heap()->is_in_or_null(receiver()),
973 "sanity check");
974 assert(receiver.is_null() ||
975 !Universe::heap()->is_in(receiver->klass()),
976 "sanity check");
977 }
978
979 // resolve method
980 CallInfo info;
981 constantPoolHandle pool(current, last_frame.method()->constants());
982
983 methodHandle resolved_method;
984
985 int method_index = last_frame.get_index_u2(bytecode);
986 {
987 JvmtiHideSingleStepping jhss(current);
988 JavaThread* THREAD = current; // For exception macros.
989 LinkResolver::resolve_invoke(info, receiver, pool,
990 method_index, bytecode,
991 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(cds, resolve)("Not resolved: class not linked: %s %s %s",
1092 resolved_iklass->is_shared() ? "is_shared" : "",
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 case Bytecodes::_getstatic: resolve_getstatic(current); break;
1162 case Bytecodes::_putstatic: resolve_putstatic(current); break;
1163 case Bytecodes::_getfield: resolve_getfield(current); break;
1164 case Bytecodes::_putfield: resolve_putfield(current); break;
1165
1166 case Bytecodes::_invokevirtual: resolve_invokevirtual(current); break;
1167 case Bytecodes::_invokespecial: resolve_invokespecial(current); break;
1168 case Bytecodes::_invokestatic: resolve_invokestatic(current); break;
1169 case Bytecodes::_invokeinterface: resolve_invokeinterface(current); break;
1170 case Bytecodes::_invokehandle: resolve_invokehandle(current); break;
1171 case Bytecodes::_invokedynamic: resolve_invokedynamic(current); break;
1172
1173 default:
1174 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1175 break;
1176 }
1177 }
1178 JRT_END
1179
1180 //------------------------------------------------------------------------------------------------------------------------
1181 // Miscellaneous
1182
1183
1184 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1185 // Enable WXWrite: the function is called directly by interpreter.
1186 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1187
1188 // frequency_counter_overflow_inner can throw async exception.
1189 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1190 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1191 if (branch_bcp != nullptr && nm != nullptr) {
1192 // This was a successful request for an OSR nmethod. Because
1193 // frequency_counter_overflow_inner ends with a safepoint check,
1194 // nm could have been unloaded so look it up again. It's unsafe
1195 // to examine nm directly since it might have been freed and used
1196 // for something else.
1197 LastFrameAccessor last_frame(current);
1198 Method* method = last_frame.method();
1199 int bci = method->bci_from(last_frame.bcp());
1200 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1201 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1202 if (nm != nullptr && bs_nm != nullptr) {
1203 // in case the transition passed a safepoint we need to barrier this again
1204 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1205 nm = nullptr;
1206 }
1207 }
1208 }
1209 if (nm != nullptr && current->is_interp_only_mode()) {
1210 // Normally we never get an nm if is_interp_only_mode() is true, because
1211 // policy()->event has a check for this and won't compile the method when
1212 // true. However, it's possible for is_interp_only_mode() to become true
1213 // during the compilation. We don't want to return the nm in that case
1214 // because we want to continue to execute interpreted.
1215 nm = nullptr;
1216 }
1217 #ifndef PRODUCT
1218 if (TraceOnStackReplacement) {
1219 if (nm != nullptr) {
1220 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1221 nm->print();
1222 }
1223 }
1224 #endif
1225 return nm;
1226 }
1227
1228 JRT_ENTRY_PROF(nmethod*, InterpreterRuntime, frequency_counter_overflow,
1229 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1230 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1231 // flag, in case this method triggers classloading which will call into Java.
1232 UnlockFlagSaver fs(current);
1233
1234 LastFrameAccessor last_frame(current);
1235 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1236 methodHandle method(current, last_frame.method());
1237 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1238 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1239
1240 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1241
1242 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1243 if (osr_nm != nullptr && bs_nm != nullptr) {
1244 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1245 osr_nm = nullptr;
1246 }
1247 }
1248 return osr_nm;
1249 JRT_END
1250
1251 JRT_LEAF_PROF_NO_THREAD(jint, InterpreterRuntime, bcp_to_di, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1252 assert(ProfileInterpreter, "must be profiling interpreter");
1253 int bci = method->bci_from(cur_bcp);
1254 MethodData* mdo = method->method_data();
1255 if (mdo == nullptr) return 0;
1256 return mdo->bci_to_di(bci);
1257 JRT_END
1258
1259 #ifdef ASSERT
1260 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1261 assert(ProfileInterpreter, "must be profiling interpreter");
1262
1263 MethodData* mdo = method->method_data();
1264 assert(mdo != nullptr, "must not be null");
1265
1266 int bci = method->bci_from(bcp);
1267
1268 address mdp2 = mdo->bci_to_dp(bci);
1269 if (mdp != mdp2) {
1270 ResourceMark rm;
1271 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1272 int current_di = mdo->dp_to_di(mdp);
1273 int expected_di = mdo->dp_to_di(mdp2);
1274 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1275 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1276 int approx_bci = -1;
1277 if (current_di >= 0) {
1278 approx_bci = mdo->data_at(current_di)->bci();
1279 }
1280 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1281 mdo->print_on(tty);
1282 method->print_codes();
1283 }
1284 assert(mdp == mdp2, "wrong mdp");
1285 JRT_END
1286 #endif // ASSERT
1287
1288 JRT_ENTRY_PROF(void, InterpreterRuntime, update_mdp_for_ret, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1289 assert(ProfileInterpreter, "must be profiling interpreter");
1290 ResourceMark rm(current);
1291 LastFrameAccessor last_frame(current);
1292 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1293 MethodData* h_mdo = last_frame.method()->method_data();
1294
1295 // Grab a lock to ensure atomic access to setting the return bci and
1296 // the displacement. This can block and GC, invalidating all naked oops.
1297 MutexLocker ml(RetData_lock);
1298
1299 // ProfileData is essentially a wrapper around a derived oop, so we
1300 // need to take the lock before making any ProfileData structures.
1301 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1302 guarantee(data != nullptr, "profile data must be valid");
1303 RetData* rdata = data->as_RetData();
1304 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1305 last_frame.set_mdp(new_mdp);
1306 JRT_END
1307
1308 JRT_ENTRY_PROF(MethodCounters*, InterpreterRuntime, build_method_counters, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1309 return Method::build_method_counters(current, m);
1310 JRT_END
1311
1312
1313 JRT_ENTRY_PROF(void, InterpreterRuntime, at_safepoint, InterpreterRuntime::at_safepoint(JavaThread* current))
1314 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1315 // stack traversal automatically takes care of preserving arguments for invoke, so
1316 // this is no longer needed.
1317
1318 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1319 // if this is called during a safepoint
1320
1321 if (JvmtiExport::should_post_single_step()) {
1322 // This function is called by the interpreter when single stepping. Such single
1323 // stepping could unwind a frame. Then, it is important that we process any frames
1324 // that we might return into.
1325 StackWatermarkSet::before_unwind(current);
1326
1327 // We are called during regular safepoints and when the VM is
1328 // single stepping. If any thread is marked for single stepping,
1329 // then we may have JVMTI work to do.
1330 LastFrameAccessor last_frame(current);
1331 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1332 }
1333 JRT_END
1334
1335 JRT_LEAF_PROF(void, InterpreterRuntime, at_unwind, InterpreterRuntime::at_unwind(JavaThread* current))
1336 assert(current == JavaThread::current(), "pre-condition");
1337 // This function is called by the interpreter when the return poll found a reason
1338 // to call the VM. The reason could be that we are returning into a not yet safe
1339 // to access frame. We handle that below.
1340 // Note that this path does not check for single stepping, because we do not want
1341 // to single step when unwinding frames for an exception being thrown. Instead,
1342 // such single stepping code will use the safepoint table, which will use the
1343 // InterpreterRuntime::at_safepoint callback.
1344 StackWatermarkSet::before_unwind(current);
1345 JRT_END
1346
1347 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_access, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1348 ResolvedFieldEntry *entry))
1349
1350 // check the access_flags for the field in the klass
1351
1352 InstanceKlass* ik = entry->field_holder();
1353 int index = entry->field_index();
1354 if (!ik->field_status(index).is_access_watched()) return;
1355
1356 bool is_static = (obj == nullptr);
1357 HandleMark hm(current);
1358
1359 Handle h_obj;
1360 if (!is_static) {
1361 // non-static field accessors have an object, but we need a handle
1362 h_obj = Handle(current, obj);
1363 }
1364 InstanceKlass* field_holder = entry->field_holder(); // HERE
1365 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1366 LastFrameAccessor last_frame(current);
1367 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1368 JRT_END
1369
1370 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_modification, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1371 ResolvedFieldEntry *entry, jvalue *value))
1372
1373 InstanceKlass* ik = entry->field_holder();
1374
1375 // check the access_flags for the field in the klass
1376 int index = entry->field_index();
1377 // bail out if field modifications are not watched
1378 if (!ik->field_status(index).is_modification_watched()) return;
1379
1380 char sig_type = '\0';
1381
1382 switch((TosState)entry->tos_state()) {
1383 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1384 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1385 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1386 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1387 case itos: sig_type = JVM_SIGNATURE_INT; break;
1388 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1389 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1390 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1391 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1392 default: ShouldNotReachHere(); return;
1393 }
1394 bool is_static = (obj == nullptr);
1395
1396 HandleMark hm(current);
1397 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1398 jvalue fvalue;
1399 #ifdef _LP64
1400 fvalue = *value;
1401 #else
1402 // Long/double values are stored unaligned and also noncontiguously with
1403 // tagged stacks. We can't just do a simple assignment even in the non-
1404 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1405 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1406 // We assume that the two halves of longs/doubles are stored in interpreter
1407 // stack slots in platform-endian order.
1408 jlong_accessor u;
1409 jint* newval = (jint*)value;
1410 u.words[0] = newval[0];
1411 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1412 fvalue.j = u.long_value;
1413 #endif // _LP64
1414
1415 Handle h_obj;
1416 if (!is_static) {
1417 // non-static field accessors have an object, but we need a handle
1418 h_obj = Handle(current, obj);
1419 }
1420
1421 LastFrameAccessor last_frame(current);
1422 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1423 fid, sig_type, &fvalue);
1424 JRT_END
1425
1426 JRT_ENTRY_PROF(void, InterpreterRuntime, post_method_entry, InterpreterRuntime::post_method_entry(JavaThread* current))
1427 LastFrameAccessor last_frame(current);
1428 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1429 JRT_END
1430
1431
1432 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1433 // before transitioning to VM, and restore it after transitioning back
1434 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1435 JRT_BLOCK_ENTRY_PROF(void, InterpreterRuntime, post_method_exit, InterpreterRuntime::post_method_exit(JavaThread* current))
1436 LastFrameAccessor last_frame(current);
1437 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1438 JRT_END
1439
1440 JRT_LEAF_PROF_NO_THREAD(int, InterpreterRuntime, interpreter_contains, InterpreterRuntime::interpreter_contains(address pc))
1441 {
1442 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1443 }
1444 JRT_END
1445
1446
1447 // Implementation of SignatureHandlerLibrary
1448
1449 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1450 // Dummy definition (else normalization method is defined in CPU
1451 // dependent code)
1452 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1453 return fingerprint;
1454 }
1455 #endif
1456
1457 address SignatureHandlerLibrary::set_handler_blob() {
1458 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1459 if (handler_blob == nullptr) {
1460 return nullptr;
1461 }
1462 address handler = handler_blob->code_begin();
1463 _handler_blob = handler_blob;
1464 _handler = handler;
1465 return handler;
1466 }
1467
1468 void SignatureHandlerLibrary::initialize() {
1469 if (_fingerprints != nullptr) {
1470 return;
1471 }
1472 if (set_handler_blob() == nullptr) {
1473 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1474 }
1475
1476 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1477 SignatureHandlerLibrary::buffer_size);
1478 _buffer = bb->code_begin();
1479
1480 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1481 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1482 }
1483
1484 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1485 address handler = _handler;
1486 int insts_size = buffer->pure_insts_size();
1487 if (handler + insts_size > _handler_blob->code_end()) {
1488 // get a new handler blob
1489 handler = set_handler_blob();
1490 }
1491 if (handler != nullptr) {
1492 memcpy(handler, buffer->insts_begin(), insts_size);
1493 pd_set_handler(handler);
1494 ICache::invalidate_range(handler, insts_size);
1495 _handler = handler + insts_size;
1496 }
1497 return handler;
1498 }
1499
1500 void SignatureHandlerLibrary::add(const methodHandle& method) {
1501 if (method->signature_handler() == nullptr) {
1502 // use slow signature handler if we can't do better
1503 int handler_index = -1;
1504 // check if we can use customized (fast) signature handler
1505 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1506 // use customized signature handler
1507 MutexLocker mu(SignatureHandlerLibrary_lock);
1508 // make sure data structure is initialized
1509 initialize();
1510 // lookup method signature's fingerprint
1511 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1512 // allow CPU dependent code to optimize the fingerprints for the fast handler
1513 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1514 handler_index = _fingerprints->find(fingerprint);
1515 // create handler if necessary
1516 if (handler_index < 0) {
1517 ResourceMark rm;
1518 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1519 CodeBuffer buffer((address)(_buffer + align_offset),
1520 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1521 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1522 // copy into code heap
1523 address handler = set_handler(&buffer);
1524 if (handler == nullptr) {
1525 // use slow signature handler (without memorizing it in the fingerprints)
1526 } else {
1527 // debugging support
1528 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1529 ttyLocker ttyl;
1530 tty->cr();
1531 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1532 _handlers->length(),
1533 (method->is_static() ? "static" : "receiver"),
1534 method->name_and_sig_as_C_string(),
1535 fingerprint,
1536 buffer.insts_size());
1537 if (buffer.insts_size() > 0) {
1538 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1539 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1540 }
1541 #ifndef PRODUCT
1542 address rh_begin = Interpreter::result_handler(method()->result_type());
1543 if (CodeCache::contains(rh_begin)) {
1544 // else it might be special platform dependent values
1545 tty->print_cr(" --- associated result handler ---");
1546 address rh_end = rh_begin;
1547 while (*(int*)rh_end != 0) {
1548 rh_end += sizeof(int);
1549 }
1550 Disassembler::decode(rh_begin, rh_end);
1551 } else {
1552 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1553 }
1554 #endif
1555 }
1556 // add handler to library
1557 _fingerprints->append(fingerprint);
1558 _handlers->append(handler);
1559 // set handler index
1560 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1561 handler_index = _fingerprints->length() - 1;
1562 }
1563 }
1564 // Set handler under SignatureHandlerLibrary_lock
1565 if (handler_index < 0) {
1566 // use generic signature handler
1567 method->set_signature_handler(Interpreter::slow_signature_handler());
1568 } else {
1569 // set handler
1570 method->set_signature_handler(_handlers->at(handler_index));
1571 }
1572 } else {
1573 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1574 // use generic signature handler
1575 method->set_signature_handler(Interpreter::slow_signature_handler());
1576 }
1577 }
1578 #ifdef ASSERT
1579 int handler_index = -1;
1580 int fingerprint_index = -2;
1581 {
1582 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1583 // in any way if accessed from multiple threads. To avoid races with another
1584 // thread which may change the arrays in the above, mutex protected block, we
1585 // have to protect this read access here with the same mutex as well!
1586 MutexLocker mu(SignatureHandlerLibrary_lock);
1587 if (_handlers != nullptr) {
1588 handler_index = _handlers->find(method->signature_handler());
1589 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1590 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1591 fingerprint_index = _fingerprints->find(fingerprint);
1592 }
1593 }
1594 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1595 handler_index == fingerprint_index, "sanity check");
1596 #endif // ASSERT
1597 }
1598
1599 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1600 int handler_index = -1;
1601 // use customized signature handler
1602 MutexLocker mu(SignatureHandlerLibrary_lock);
1603 // make sure data structure is initialized
1604 initialize();
1605 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1606 handler_index = _fingerprints->find(fingerprint);
1607 // create handler if necessary
1608 if (handler_index < 0) {
1609 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1610 tty->cr();
1611 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1612 _handlers->length(),
1613 p2i(handler),
1614 fingerprint);
1615 }
1616 _fingerprints->append(fingerprint);
1617 _handlers->append(handler);
1618 } else {
1619 if (PrintSignatureHandlers) {
1620 tty->cr();
1621 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1622 _handlers->length(),
1623 fingerprint,
1624 p2i(_handlers->at(handler_index)),
1625 p2i(handler));
1626 }
1627 }
1628 }
1629
1630
1631 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1632 address SignatureHandlerLibrary::_handler = nullptr;
1633 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1634 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1635 address SignatureHandlerLibrary::_buffer = nullptr;
1636
1637
1638 JRT_ENTRY_PROF(void, InterpreterRuntime, prepare_native_call, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1639 methodHandle m(current, method);
1640 assert(m->is_native(), "sanity check");
1641 // lookup native function entry point if it doesn't exist
1642 if (!m->has_native_function()) {
1643 NativeLookup::lookup(m, CHECK);
1644 }
1645 // make sure signature handler is installed
1646 SignatureHandlerLibrary::add(m);
1647 // The interpreter entry point checks the signature handler first,
1648 // before trying to fetch the native entry point and klass mirror.
1649 // We must set the signature handler last, so that multiple processors
1650 // preparing the same method will be sure to see non-null entry & mirror.
1651 JRT_END
1652
1653 #if defined(IA32) || defined(AMD64) || defined(ARM)
1654 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1655 assert(current == JavaThread::current(), "pre-condition");
1656 if (src_address == dest_address) {
1657 return;
1658 }
1659 ResourceMark rm;
1660 LastFrameAccessor last_frame(current);
1661 assert(last_frame.is_interpreted_frame(), "");
1662 jint bci = last_frame.bci();
1663 methodHandle mh(current, last_frame.method());
1664 Bytecode_invoke invoke(mh, bci);
1665 ArgumentSizeComputer asc(invoke.signature());
1666 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1667 Copy::conjoint_jbytes(src_address, dest_address,
1668 size_of_arguments * Interpreter::stackElementSize);
1669 JRT_END
1670 #endif
1671
1672 #if INCLUDE_JVMTI
1673 // This is a support of the JVMTI PopFrame interface.
1674 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1675 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1676 // The member_name argument is a saved reference (in local#0) to the member_name.
1677 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1678 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1679 JRT_ENTRY_PROF(void, InterpreterRuntime, member_name_arg_or_null,
1680 InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1681 Method* method, address bcp))
1682 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1683 if (code != Bytecodes::_invokestatic) {
1684 return;
1685 }
1686 ConstantPool* cpool = method->constants();
1687 int cp_index = Bytes::get_native_u2(bcp + 1);
1688 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1689 Symbol* mname = cpool->name_ref_at(cp_index, code);
1690
1691 if (MethodHandles::has_member_arg(cname, mname)) {
1692 oop member_name_oop = cast_to_oop(member_name);
1693 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1694 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1695 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1696 }
1697 current->set_vm_result(member_name_oop);
1698 } else {
1699 current->set_vm_result(nullptr);
1700 }
1701 JRT_END
1702 #endif // INCLUDE_JVMTI
1703
1704 #ifndef PRODUCT
1705 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1706 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1707 // The generated code still uses call_VM because that will set up the frame pointer for
1708 // bcp and method.
1709 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1710 assert(current == JavaThread::current(), "pre-condition");
1711 LastFrameAccessor last_frame(current);
1712 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1713 methodHandle mh(current, last_frame.method());
1714 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1715 return preserve_this_value;
1716 JRT_END
1717 #endif // !PRODUCT
1718
1719 #define DO_COUNTERS(macro) \
1720 macro(InterpreterRuntime, ldc) \
1721 macro(InterpreterRuntime, resolve_ldc) \
1722 macro(InterpreterRuntime, new) \
1723 macro(InterpreterRuntime, newarray) \
1724 macro(InterpreterRuntime, anewarray) \
1725 macro(InterpreterRuntime, multianewarray) \
1726 macro(InterpreterRuntime, register_finalizer) \
1727 macro(InterpreterRuntime, quicken_io_cc) \
1728 macro(InterpreterRuntime, throw_StackOverflowError) \
1729 macro(InterpreterRuntime, throw_delayed_StackOverflowError) \
1730 macro(InterpreterRuntime, create_exception) \
1731 macro(InterpreterRuntime, create_klass_exception) \
1732 macro(InterpreterRuntime, throw_ArrayIndexOutOfBoundsException) \
1733 macro(InterpreterRuntime, throw_ClassCastException) \
1734 macro(InterpreterRuntime, exception_handler_for_exception) \
1735 macro(InterpreterRuntime, throw_pending_exception) \
1736 macro(InterpreterRuntime, throw_AbstractMethodError) \
1737 macro(InterpreterRuntime, throw_AbstractMethodErrorWithMethod) \
1738 macro(InterpreterRuntime, throw_AbstractMethodErrorVerbose) \
1739 macro(InterpreterRuntime, throw_IncompatibleClassChangeError) \
1740 macro(InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose) \
1741 macro(InterpreterRuntime, throw_NullPointerException) \
1742 macro(InterpreterRuntime, monitorenter) \
1743 macro(InterpreterRuntime, monitorexit) \
1744 macro(InterpreterRuntime, throw_illegal_monitor_state_exception) \
1745 macro(InterpreterRuntime, new_illegal_monitor_state_exception) \
1746 macro(InterpreterRuntime, get_original_bytecode_at) \
1747 macro(InterpreterRuntime, set_original_bytecode_at) \
1748 macro(InterpreterRuntime, breakpoint) \
1749 macro(InterpreterRuntime, resolve_getfield) \
1750 macro(InterpreterRuntime, resolve_putfield) \
1751 macro(InterpreterRuntime, resolve_getstatic) \
1752 macro(InterpreterRuntime, resolve_putstatic) \
1753 macro(InterpreterRuntime, resolve_invokevirtual) \
1754 macro(InterpreterRuntime, resolve_invokespecial) \
1755 macro(InterpreterRuntime, resolve_invokestatic) \
1756 macro(InterpreterRuntime, resolve_invokeinterface) \
1757 macro(InterpreterRuntime, resolve_invokehandle) \
1758 macro(InterpreterRuntime, resolve_invokedynamic) \
1759 macro(InterpreterRuntime, frequency_counter_overflow) \
1760 macro(InterpreterRuntime, bcp_to_di) \
1761 macro(InterpreterRuntime, update_mdp_for_ret) \
1762 macro(InterpreterRuntime, build_method_counters) \
1763 macro(InterpreterRuntime, at_safepoint) \
1764 macro(InterpreterRuntime, at_unwind) \
1765 macro(InterpreterRuntime, post_field_access) \
1766 macro(InterpreterRuntime, post_field_modification) \
1767 macro(InterpreterRuntime, post_method_entry) \
1768 macro(InterpreterRuntime, post_method_exit) \
1769 macro(InterpreterRuntime, interpreter_contains) \
1770 macro(InterpreterRuntime, prepare_native_call)
1771
1772 #if INCLUDE_JVMTI
1773 #define DO_JVMTI_COUNTERS(macro) \
1774 macro(InterpreterRuntime, member_name_arg_or_null)
1775 #else
1776 #define DO_JVMTI_COUNTERS(macro)
1777 #endif /* INCLUDE_JVMTI */
1778
1779 #define INIT_COUNTER(sub, name) \
1780 NEWPERFTICKCOUNTERS(_perf_##sub##_##name##_timer, SUN_CI, #sub "::" #name); \
1781 NEWPERFEVENTCOUNTER(_perf_##sub##_##name##_count, SUN_CI, #sub "::" #name "_count");
1782
1783 void InterpreterRuntime::init_counters() {
1784 if (UsePerfData) {
1785 EXCEPTION_MARK;
1786
1787 DO_COUNTERS(INIT_COUNTER)
1788 DO_JVMTI_COUNTERS(INIT_COUNTER)
1789
1790 if (HAS_PENDING_EXCEPTION) {
1791 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
1792 }
1793 }
1794 }
1795 #undef INIT_COUNTER
1796
1797 #define PRINT_COUNTER(sub, name) { \
1798 jlong count = _perf_##sub##_##name##_count->get_value(); \
1799 if (count > 0) { \
1800 st->print_cr(" %-50s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
1801 #sub "::" #name, \
1802 _perf_##sub##_##name##_timer->elapsed_counter_value_us(), \
1803 _perf_##sub##_##name##_timer->thread_counter_value_us(), \
1804 count); \
1805 }}
1806
1807 void InterpreterRuntime::print_counters_on(outputStream* st) {
1808 if (UsePerfData && ProfileRuntimeCalls) {
1809 DO_COUNTERS(PRINT_COUNTER)
1810 DO_JVMTI_COUNTERS(PRINT_COUNTER)
1811 } else {
1812 st->print_cr(" InterpreterRuntime: no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
1813 }
1814 }
1815
1816 #undef PRINT_COUNTER
1817 #undef DO_JVMTI_COUNTERS
1818 #undef DO_COUNTERS
1819