1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "classfile/javaClasses.inline.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/vmClasses.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compilationPolicy.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/barrierSetNMethod.hpp"
34 #include "gc/shared/collectedHeap.hpp"
35 #include "interpreter/bytecodeTracer.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/interpreterRuntime.hpp"
38 #include "interpreter/linkResolver.hpp"
39 #include "interpreter/templateTable.hpp"
40 #include "jvm_io.h"
41 #include "logging/log.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/constantPool.inline.hpp"
46 #include "oops/cpCache.inline.hpp"
47 #include "oops/instanceKlass.inline.hpp"
48 #include "oops/klass.inline.hpp"
49 #include "oops/methodData.hpp"
50 #include "oops/method.inline.hpp"
51 #include "oops/objArrayKlass.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "oops/symbol.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/methodHandles.hpp"
57 #include "prims/nativeLookup.hpp"
58 #include "runtime/atomic.hpp"
59 #include "runtime/continuation.hpp"
60 #include "runtime/deoptimization.hpp"
61 #include "runtime/fieldDescriptor.inline.hpp"
62 #include "runtime/frame.inline.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/icache.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jfieldIDWorkaround.hpp"
69 #include "runtime/osThread.hpp"
70 #include "runtime/perfData.inline.hpp"
71 #include "runtime/sharedRuntime.hpp"
72 #include "runtime/stackWatermarkSet.hpp"
73 #include "runtime/stubRoutines.hpp"
74 #include "runtime/synchronizer.inline.hpp"
75 #include "runtime/threadCritical.hpp"
76 #include "services/management.hpp"
77 #include "utilities/align.hpp"
78 #include "utilities/checkedCast.hpp"
79 #include "utilities/copy.hpp"
80 #include "utilities/events.hpp"
81
82 // Helper class to access current interpreter state
83 class LastFrameAccessor : public StackObj {
84 frame _last_frame;
85 public:
86 LastFrameAccessor(JavaThread* current) {
87 assert(current == Thread::current(), "sanity");
88 _last_frame = current->last_frame();
89 }
90 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
91 Method* method() const { return _last_frame.interpreter_frame_method(); }
92 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
93 int bci() const { return _last_frame.interpreter_frame_bci(); }
94 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
95
96 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
97 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
98
99 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
100 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
101
102 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
103 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
104 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
105 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
106 int number_of_dimensions() const { return bcp()[3]; }
107
108 oop callee_receiver(Symbol* signature) {
109 return _last_frame.interpreter_callee_receiver(signature);
110 }
111 BasicObjectLock* monitor_begin() const {
112 return _last_frame.interpreter_frame_monitor_begin();
113 }
114 BasicObjectLock* monitor_end() const {
115 return _last_frame.interpreter_frame_monitor_end();
116 }
117 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
118 return _last_frame.next_monitor_in_interpreter_frame(current);
119 }
120
121 frame& get_frame() { return _last_frame; }
122 };
123
124 static bool is_resolved(JavaThread* current) {
125 LastFrameAccessor last_frame(current);
126 ConstantPool* constants = last_frame.method()->constants();
127 Bytecodes::Code bc = last_frame.code();
128
129 if (bc == Bytecodes::_ldc || bc == Bytecodes::_ldc_w || bc == Bytecodes::_ldc2_w ||
130 bc == Bytecodes::_fast_aldc || bc == Bytecodes::_fast_aldc_w) {
131 bool is_wide = (bc != Bytecodes::_ldc) && (bc != Bytecodes::_fast_aldc);
132 int index = (is_wide ? last_frame.get_index_u1(bc) : last_frame.get_index_u2(bc));
133 constantTag tag = constants->tag_at(index);
134 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
135 return constants->tag_at(index).is_klass();
136 } else if (bc == Bytecodes::_invokedynamic) {
137 int index = last_frame.get_index_u4(bc);
138 int indy_index = index;
139 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
140 return indy_entry->is_resolved();
141 } else if (Bytecodes::is_invoke(bc)) {
142 int index = last_frame.get_index_u2(bc);
143 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
144 return rme->is_resolved(bc);
145 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
146 if (bc == Bytecodes::_nofast_getfield) {
147 bc = Bytecodes::_getfield;
148 } else if (bc == Bytecodes::_nofast_putfield) {
149 bc = Bytecodes::_putfield;
150 }
151 int index = last_frame.get_index_u2(bc);
152 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
153 return field_entry->is_resolved(bc);
154 } else if (bc == Bytecodes::_new) {
155 int index = last_frame.get_index_u2(bc);
156 constantTag tag = constants->tag_at(index);
157 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
158 return constants->tag_at(index).is_klass();
159 }
160 return false;
161 }
162
163 static void trace_current_location(JavaThread* current) {
164 LogStreamHandle(Debug, init, interpreter) log;
165 if (current->profile_rt_calls() && log.is_enabled()) {
166 ResourceMark rm(current);
167 LastFrameAccessor last_frame(current);
168 Method* caller = last_frame.method();
169 ConstantPool* constants = caller->constants();
170 Bytecodes::Code bc = last_frame.code();
171 log.print("InterpreterRuntime: " INTPTR_FORMAT ": %s: " INTPTR_FORMAT,
172 p2i(current), Bytecodes::name(bc), p2i(caller));
173 if (caller->is_shared()) {
174 log.print(" shared");
175 }
176 if (is_resolved(current)) {
177 log.print(" resolved");
178 }
179 log.print(" ");
180 caller->print_short_name(&log);
181 log.print(" @ %d:", last_frame.bci());
182 int instruction_size = last_frame.bytecode().instruction_size();
183
184 if (Bytecodes::is_invoke(bc) && bc != Bytecodes::_invokedynamic) {
185 int index = last_frame.get_index_u2(bc);
186 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
187 if (rme->is_resolved(bc)) {
188 Method* m = rme->method();
189 if (m != nullptr) {
190 log.print(" %s", m->method_holder()->init_state_name());
191 } else {
192 log.print(" null");
193 }
194 }
195 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
196 if (bc == Bytecodes::_nofast_getfield) {
197 bc = Bytecodes::_getfield;
198 } else if (bc == Bytecodes::_nofast_putfield) {
199 bc = Bytecodes::_putfield;
200 }
201 int index = last_frame.get_index_u2(bc);
202 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
203
204 if (field_entry->is_resolved(bc)) {
205 log.print(" %s", field_entry->field_holder()->init_state_name());
206 }
207 } else if (bc == Bytecodes::_new) {
208 int index = last_frame.get_index_u2(bc);
209 constantTag tag = constants->tag_at(index);
210 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
211 if (constants->tag_at(index).is_klass()) {
212 CPKlassSlot kslot = constants->klass_slot_at(index);
213 int resolved_klass_index = kslot.resolved_klass_index();
214 Klass* k = constants->resolved_klasses()->at(resolved_klass_index);
215 log.print(": %s", InstanceKlass::cast(k)->init_state_name());
216 }
217 }
218 log.print(" ");
219 caller->print_codes_on(last_frame.bci(), last_frame.bci() + instruction_size, &log, /*flags*/ 0);
220
221 LogStreamHandle(Trace, init, interpreter) log1;
222 if (log1.is_enabled()) {
223 if (bc == Bytecodes::_invokedynamic) {
224 int index = last_frame.get_index_u4(bc);
225 int indy_index = index;
226 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
227 indy_entry->print_on(&log1);
228 } else if (Bytecodes::is_invoke(bc)) {
229 int index = last_frame.get_index_u2(bc);
230 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
231 rme->print_on(&log1);
232 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
233 int index = last_frame.get_index_u2(bc);
234 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
235 field_entry->print_on(&log1);
236 }
237 }
238 }
239 }
240
241 //------------------------------------------------------------------------------------------------------------------------
242 // State accessors
243
244 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
245 LastFrameAccessor last_frame(current);
246 last_frame.set_bcp(bcp);
247 if (ProfileInterpreter) {
248 // ProfileTraps uses MDOs independently of ProfileInterpreter.
249 // That is why we must check both ProfileInterpreter and mdo != nullptr.
250 MethodData* mdo = last_frame.method()->method_data();
251 if (mdo != nullptr) {
252 NEEDS_CLEANUP;
253 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
254 }
255 }
256 }
257
258 //------------------------------------------------------------------------------------------------------------------------
259 // Constants
260
261
262 JRT_ENTRY_PROF(void, InterpreterRuntime, ldc, InterpreterRuntime::ldc(JavaThread* current, bool wide))
263 // access constant pool
264 LastFrameAccessor last_frame(current);
265 ConstantPool* pool = last_frame.method()->constants();
266 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
267 constantTag tag = pool->tag_at(cp_index);
268
269 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
270 Klass* klass = pool->klass_at(cp_index, CHECK);
271 oop java_class = klass->java_mirror();
272 current->set_vm_result(java_class);
273 JRT_END
274
275 JRT_ENTRY_PROF(void, InterpreterRuntime, resolve_ldc, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
276 assert(bytecode == Bytecodes::_ldc ||
277 bytecode == Bytecodes::_ldc_w ||
278 bytecode == Bytecodes::_ldc2_w ||
279 bytecode == Bytecodes::_fast_aldc ||
280 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
281 ResourceMark rm(current);
282 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
283 bytecode == Bytecodes::_fast_aldc_w);
284 LastFrameAccessor last_frame(current);
285 methodHandle m (current, last_frame.method());
286 Bytecode_loadconstant ldc(m, last_frame.bci());
287
288 // Double-check the size. (Condy can have any type.)
289 BasicType type = ldc.result_type();
290 switch (type2size[type]) {
291 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
292 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
293 default: ShouldNotReachHere();
294 }
295
296 // Resolve the constant. This does not do unboxing.
297 // But it does replace Universe::the_null_sentinel by null.
298 oop result = ldc.resolve_constant(CHECK);
299 assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
300
301 #ifdef ASSERT
302 {
303 // The bytecode wrappers aren't GC-safe so construct a new one
304 Bytecode_loadconstant ldc2(m, last_frame.bci());
305 int rindex = ldc2.cache_index();
306 if (rindex < 0)
307 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
308 if (rindex >= 0) {
309 oop coop = m->constants()->resolved_reference_at(rindex);
310 oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
311 assert(roop == coop, "expected result for assembly code");
312 }
313 }
314 #endif
315 current->set_vm_result(result);
316 if (!is_fast_aldc) {
317 // Tell the interpreter how to unbox the primitive.
318 guarantee(java_lang_boxing_object::is_instance(result, type), "");
319 int offset = java_lang_boxing_object::value_offset(type);
320 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
321 | (offset & ConstantPoolCache::field_index_mask));
322 current->set_vm_result_2((Metadata*)flags);
323 }
324 }
325 JRT_END
326
327
328 //------------------------------------------------------------------------------------------------------------------------
329 // Allocation
330
331 JRT_ENTRY_PROF(void, InterpreterRuntime, new, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
332 Klass* k = pool->klass_at(index, CHECK);
333 InstanceKlass* klass = InstanceKlass::cast(k);
334
335 // Make sure we are not instantiating an abstract klass
336 klass->check_valid_for_instantiation(true, CHECK);
337
338 // Make sure klass is initialized
339 klass->initialize(CHECK);
340
341 oop obj = klass->allocate_instance(CHECK);
342 current->set_vm_result(obj);
343 JRT_END
344
345
346 JRT_ENTRY_PROF(void, InterpreterRuntime, newarray, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
347 oop obj = oopFactory::new_typeArray(type, size, CHECK);
348 current->set_vm_result(obj);
349 JRT_END
350
351
352 JRT_ENTRY_PROF(void, InterpreterRuntime, anewarray, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
353 Klass* klass = pool->klass_at(index, CHECK);
354 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
355 current->set_vm_result(obj);
356 JRT_END
357
358
359 JRT_ENTRY_PROF(void, InterpreterRuntime, multianewarray, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
360 // We may want to pass in more arguments - could make this slightly faster
361 LastFrameAccessor last_frame(current);
362 ConstantPool* constants = last_frame.method()->constants();
363 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
364 Klass* klass = constants->klass_at(i, CHECK);
365 int nof_dims = last_frame.number_of_dimensions();
366 assert(klass->is_klass(), "not a class");
367 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
368
369 // We must create an array of jints to pass to multi_allocate.
370 ResourceMark rm(current);
371 const int small_dims = 10;
372 jint dim_array[small_dims];
373 jint *dims = &dim_array[0];
374 if (nof_dims > small_dims) {
375 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
376 }
377 for (int index = 0; index < nof_dims; index++) {
378 // offset from first_size_address is addressed as local[index]
379 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
380 dims[index] = first_size_address[n];
381 }
382 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
383 current->set_vm_result(obj);
384 JRT_END
385
386
387 JRT_ENTRY_PROF(void, InterpreterRuntime, register_finalizer, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
388 assert(oopDesc::is_oop(obj), "must be a valid oop");
389 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
390 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
391 JRT_END
392
393
394 // Quicken instance-of and check-cast bytecodes
395 JRT_ENTRY_PROF(void, InterpreterRuntime, quicken_io_cc, InterpreterRuntime::quicken_io_cc(JavaThread* current))
396 // Force resolving; quicken the bytecode
397 LastFrameAccessor last_frame(current);
398 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
399 ConstantPool* cpool = last_frame.method()->constants();
400 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
401 // program we might have seen an unquick'd bytecode in the interpreter but have another
402 // thread quicken the bytecode before we get here.
403 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
404 Klass* klass = cpool->klass_at(which, CHECK);
405 current->set_vm_result_2(klass);
406 JRT_END
407
408
409 //------------------------------------------------------------------------------------------------------------------------
410 // Exceptions
411
412 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
413 const methodHandle& trap_method, int trap_bci) {
414 if (trap_method.not_null()) {
415 MethodData* trap_mdo = trap_method->method_data();
416 if (trap_mdo == nullptr) {
417 ExceptionMark em(current);
418 JavaThread* THREAD = current; // For exception macros.
419 Method::build_profiling_method_data(trap_method, THREAD);
420 if (HAS_PENDING_EXCEPTION) {
421 // Only metaspace OOM is expected. No Java code executed.
422 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
423 "we expect only an OOM error here");
424 CLEAR_PENDING_EXCEPTION;
425 }
426 trap_mdo = trap_method->method_data();
427 // and fall through...
428 }
429 if (trap_mdo != nullptr) {
430 // Update per-method count of trap events. The interpreter
431 // is updating the MDO to simulate the effect of compiler traps.
432 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
433 }
434 }
435 }
436
437 // Assume the compiler is (or will be) interested in this event.
438 // If necessary, create an MDO to hold the information, and record it.
439 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
440 assert(ProfileTraps, "call me only if profiling");
441 LastFrameAccessor last_frame(current);
442 methodHandle trap_method(current, last_frame.method());
443 int trap_bci = trap_method->bci_from(last_frame.bcp());
444 note_trap_inner(current, reason, trap_method, trap_bci);
445 }
446
447 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
448 // get klass
449 InstanceKlass* klass = InstanceKlass::cast(k);
450 assert(klass->is_initialized(),
451 "this klass should have been initialized during VM initialization");
452 // create instance - do not call constructor since we may have no
453 // (java) stack space left (should assert constructor is empty)
454 Handle exception;
455 oop exception_oop = klass->allocate_instance(CHECK_(exception));
456 exception = Handle(THREAD, exception_oop);
457 if (StackTraceInThrowable) {
458 java_lang_Throwable::fill_in_stack_trace(exception);
459 }
460 return exception;
461 }
462
463 // Special handling for stack overflow: since we don't have any (java) stack
464 // space left we use the pre-allocated & pre-initialized StackOverflowError
465 // klass to create an stack overflow error instance. We do not call its
466 // constructor for the same reason (it is empty, anyway).
467 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_StackOverflowError,
468 InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
469 Handle exception = get_preinitialized_exception(
470 vmClasses::StackOverflowError_klass(),
471 CHECK);
472 // Increment counter for hs_err file reporting
473 Atomic::inc(&Exceptions::_stack_overflow_errors);
474 // Remove the ScopedValue bindings in case we got a StackOverflowError
475 // while we were trying to manipulate ScopedValue bindings.
476 current->clear_scopedValueBindings();
477 THROW_HANDLE(exception);
478 JRT_END
479
480 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_delayed_StackOverflowError,
481 InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
482 Handle exception = get_preinitialized_exception(
483 vmClasses::StackOverflowError_klass(),
484 CHECK);
485 java_lang_Throwable::set_message(exception(),
486 Universe::delayed_stack_overflow_error_message());
487 // Increment counter for hs_err file reporting
488 Atomic::inc(&Exceptions::_stack_overflow_errors);
489 // Remove the ScopedValue bindings in case we got a StackOverflowError
490 // while we were trying to manipulate ScopedValue bindings.
491 current->clear_scopedValueBindings();
492 THROW_HANDLE(exception);
493 JRT_END
494
495 JRT_ENTRY_PROF(void, InterpreterRuntime, create_exception,
496 InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
497 // lookup exception klass
498 TempNewSymbol s = SymbolTable::new_symbol(name);
499 if (ProfileTraps) {
500 if (s == vmSymbols::java_lang_ArithmeticException()) {
501 note_trap(current, Deoptimization::Reason_div0_check);
502 } else if (s == vmSymbols::java_lang_NullPointerException()) {
503 note_trap(current, Deoptimization::Reason_null_check);
504 }
505 }
506 // create exception
507 Handle exception = Exceptions::new_exception(current, s, message);
508 current->set_vm_result(exception());
509 JRT_END
510
511
512 JRT_ENTRY_PROF(void, InterpreterRuntime, create_klass_exception,
513 InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
514 // Produce the error message first because note_trap can safepoint
515 ResourceMark rm(current);
516 const char* klass_name = obj->klass()->external_name();
517 // lookup exception klass
518 TempNewSymbol s = SymbolTable::new_symbol(name);
519 if (ProfileTraps) {
520 if (s == vmSymbols::java_lang_ArrayStoreException()) {
521 note_trap(current, Deoptimization::Reason_array_check);
522 } else {
523 note_trap(current, Deoptimization::Reason_class_check);
524 }
525 }
526 // create exception, with klass name as detail message
527 Handle exception = Exceptions::new_exception(current, s, klass_name);
528 current->set_vm_result(exception());
529 JRT_END
530
531 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ArrayIndexOutOfBoundsException,
532 InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
533 // Produce the error message first because note_trap can safepoint
534 ResourceMark rm(current);
535 stringStream ss;
536 ss.print("Index %d out of bounds for length %d", index, a->length());
537
538 if (ProfileTraps) {
539 note_trap(current, Deoptimization::Reason_range_check);
540 }
541
542 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
543 JRT_END
544
545 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ClassCastException,
546 InterpreterRuntime::throw_ClassCastException(
547 JavaThread* current, oopDesc* obj))
548
549 // Produce the error message first because note_trap can safepoint
550 ResourceMark rm(current);
551 char* message = SharedRuntime::generate_class_cast_message(
552 current, obj->klass());
553
554 if (ProfileTraps) {
555 note_trap(current, Deoptimization::Reason_class_check);
556 }
557
558 // create exception
559 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
560 JRT_END
561
562 // exception_handler_for_exception(...) returns the continuation address,
563 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
564 // The exception oop is returned to make sure it is preserved over GC (it
565 // is only on the stack if the exception was thrown explicitly via athrow).
566 // During this operation, the expression stack contains the values for the
567 // bci where the exception happened. If the exception was propagated back
568 // from a call, the expression stack contains the values for the bci at the
569 // invoke w/o arguments (i.e., as if one were inside the call).
570 // Note that the implementation of this method assumes it's only called when an exception has actually occured
571 JRT_ENTRY_PROF(address, InterpreterRuntime, exception_handler_for_exception,
572 InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
573 // We get here after we have unwound from a callee throwing an exception
574 // into the interpreter. Any deferred stack processing is notified of
575 // the event via the StackWatermarkSet.
576 StackWatermarkSet::after_unwind(current);
577
578 LastFrameAccessor last_frame(current);
579 Handle h_exception(current, exception);
580 methodHandle h_method (current, last_frame.method());
581 constantPoolHandle h_constants(current, h_method->constants());
582 bool should_repeat;
583 int handler_bci;
584 int current_bci = last_frame.bci();
585
586 if (current->frames_to_pop_failed_realloc() > 0) {
587 // Allocation of scalar replaced object used in this frame
588 // failed. Unconditionally pop the frame.
589 current->dec_frames_to_pop_failed_realloc();
590 current->set_vm_result(h_exception());
591 // If the method is synchronized we already unlocked the monitor
592 // during deoptimization so the interpreter needs to skip it when
593 // the frame is popped.
594 current->set_do_not_unlock_if_synchronized(true);
595 return Interpreter::remove_activation_entry();
596 }
597
598 // Need to do this check first since when _do_not_unlock_if_synchronized
599 // is set, we don't want to trigger any classloading which may make calls
600 // into java, or surprisingly find a matching exception handler for bci 0
601 // since at this moment the method hasn't been "officially" entered yet.
602 if (current->do_not_unlock_if_synchronized()) {
603 ResourceMark rm;
604 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
605 current->set_vm_result(exception);
606 return Interpreter::remove_activation_entry();
607 }
608
609 do {
610 should_repeat = false;
611
612 // assertions
613 assert(h_exception.not_null(), "null exceptions should be handled by athrow");
614 // Check that exception is a subclass of Throwable.
615 assert(h_exception->is_a(vmClasses::Throwable_klass()),
616 "Exception not subclass of Throwable");
617
618 // tracing
619 if (log_is_enabled(Info, exceptions)) {
620 ResourceMark rm(current);
621 stringStream tempst;
622 tempst.print("interpreter method <%s>\n"
623 " at bci %d for thread " INTPTR_FORMAT " (%s)",
624 h_method->print_value_string(), current_bci, p2i(current), current->name());
625 Exceptions::log_exception(h_exception, tempst.as_string());
626 }
627 // Don't go paging in something which won't be used.
628 // else if (extable->length() == 0) {
629 // // disabled for now - interpreter is not using shortcut yet
630 // // (shortcut is not to call runtime if we have no exception handlers)
631 // // warning("performance bug: should not call runtime if method has no exception handlers");
632 // }
633 // for AbortVMOnException flag
634 Exceptions::debug_check_abort(h_exception);
635
636 // exception handler lookup
637 Klass* klass = h_exception->klass();
638 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
639 if (HAS_PENDING_EXCEPTION) {
640 // We threw an exception while trying to find the exception handler.
641 // Transfer the new exception to the exception handle which will
642 // be set into thread local storage, and do another lookup for an
643 // exception handler for this exception, this time starting at the
644 // BCI of the exception handler which caused the exception to be
645 // thrown (bug 4307310).
646 h_exception = Handle(THREAD, PENDING_EXCEPTION);
647 CLEAR_PENDING_EXCEPTION;
648 if (handler_bci >= 0) {
649 current_bci = handler_bci;
650 should_repeat = true;
651 }
652 }
653 } while (should_repeat == true);
654
655 #if INCLUDE_JVMCI
656 if (EnableJVMCI && h_method->method_data() != nullptr) {
657 ResourceMark rm(current);
658 MethodData* mdo = h_method->method_data();
659
660 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
661 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
662
663 ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
664 if (pdata != nullptr && pdata->is_BitData()) {
665 BitData* bit_data = (BitData*) pdata;
666 bit_data->set_exception_seen();
667 }
668 }
669 #endif
670
671 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
672 // time throw or a stack unwinding throw and accordingly notify the debugger
673 if (JvmtiExport::can_post_on_exceptions()) {
674 JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
675 }
676
677 address continuation = nullptr;
678 address handler_pc = nullptr;
679 if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
680 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
681 // handler in this method, or (b) after a stack overflow there is not yet
682 // enough stack space available to reprotect the stack.
683 continuation = Interpreter::remove_activation_entry();
684 #if COMPILER2_OR_JVMCI
685 // Count this for compilation purposes
686 h_method->interpreter_throwout_increment(THREAD);
687 #endif
688 } else {
689 // handler in this method => change bci/bcp to handler bci/bcp and continue there
690 handler_pc = h_method->code_base() + handler_bci;
691 h_method->set_exception_handler_entered(handler_bci); // profiling
692 #ifndef ZERO
693 set_bcp_and_mdp(handler_pc, current);
694 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
695 #else
696 continuation = (address)(intptr_t) handler_bci;
697 #endif
698 }
699
700 // notify debugger of an exception catch
701 // (this is good for exceptions caught in native methods as well)
702 if (JvmtiExport::can_post_on_exceptions()) {
703 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
704 }
705
706 current->set_vm_result(h_exception());
707 return continuation;
708 JRT_END
709
710
711 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_pending_exception, InterpreterRuntime::throw_pending_exception(JavaThread* current))
712 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
713 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
714 JRT_END
715
716
717 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodError, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
718 THROW(vmSymbols::java_lang_AbstractMethodError());
719 JRT_END
720
721 // This method is called from the "abstract_entry" of the interpreter.
722 // At that point, the arguments have already been removed from the stack
723 // and therefore we don't have the receiver object at our fingertips. (Though,
724 // on some platforms the receiver still resides in a register...). Thus,
725 // we have no choice but print an error message not containing the receiver
726 // type.
727 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorWithMethod,
728 InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
729 Method* missingMethod))
730 ResourceMark rm(current);
731 assert(missingMethod != nullptr, "sanity");
732 methodHandle m(current, missingMethod);
733 LinkResolver::throw_abstract_method_error(m, THREAD);
734 JRT_END
735
736 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorVerbose,
737 InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
738 Klass* recvKlass,
739 Method* missingMethod))
740 ResourceMark rm(current);
741 methodHandle mh = methodHandle(current, missingMethod);
742 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
743 JRT_END
744
745
746 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeError,
747 InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
748 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
749 JRT_END
750
751 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose,
752 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
753 Klass* recvKlass,
754 Klass* interfaceKlass))
755 ResourceMark rm(current);
756 char buf[1000];
757 buf[0] = '\0';
758 jio_snprintf(buf, sizeof(buf),
759 "Class %s does not implement the requested interface %s",
760 recvKlass ? recvKlass->external_name() : "nullptr",
761 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
762 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
763 JRT_END
764
765 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_NullPointerException,
766 InterpreterRuntime::throw_NullPointerException(JavaThread* current))
767 THROW(vmSymbols::java_lang_NullPointerException());
768 JRT_END
769
770 //------------------------------------------------------------------------------------------------------------------------
771 // Fields
772 //
773
774 PROF_ENTRY(void, InterpreterRuntime, resolve_getfield, InterpreterRuntime::resolve_getfield(JavaThread* current))
775 resolve_get_put(current, Bytecodes::_getfield);
776 PROF_END
777
778 PROF_ENTRY(void, InterpreterRuntime, resolve_putfield, InterpreterRuntime::resolve_putfield(JavaThread* current))
779 resolve_get_put(current, Bytecodes::_putfield);
780 PROF_END
781
782 PROF_ENTRY(void, InterpreterRuntime, resolve_getstatic, InterpreterRuntime::resolve_getstatic(JavaThread* current))
783 resolve_get_put(current, Bytecodes::_getstatic);
784 PROF_END
785
786 PROF_ENTRY(void, InterpreterRuntime, resolve_putstatic, InterpreterRuntime::resolve_putstatic(JavaThread* current))
787 resolve_get_put(current, Bytecodes::_putstatic);
788 PROF_END
789
790 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
791 LastFrameAccessor last_frame(current);
792 constantPoolHandle pool(current, last_frame.method()->constants());
793 methodHandle m(current, last_frame.method());
794
795 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
796 }
797
798 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
799 methodHandle& m,
800 constantPoolHandle& pool,
801 bool initialize_holder, TRAPS) {
802 fieldDescriptor info;
803 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
804 bytecode == Bytecodes::_putstatic);
805 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
806
807 {
808 JvmtiHideSingleStepping jhss(THREAD);
809 LinkResolver::resolve_field_access(info, pool, field_index,
810 m, bytecode, initialize_holder, CHECK);
811 } // end JvmtiHideSingleStepping
812
813 // check if link resolution caused cpCache to be updated
814 if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
815
816 // compute auxiliary field attributes
817 TosState state = as_TosState(info.field_type());
818
819 // Resolution of put instructions on final fields is delayed. That is required so that
820 // exceptions are thrown at the correct place (when the instruction is actually invoked).
821 // If we do not resolve an instruction in the current pass, leaving the put_code
822 // set to zero will cause the next put instruction to the same field to reresolve.
823
824 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
825 // to final instance fields with updates originating from a method different than <init>)
826 // is inhibited. A putfield instruction targeting an instance final field must throw
827 // an IllegalAccessError if the instruction is not in an instance
828 // initializer method <init>. If resolution were not inhibited, a putfield
829 // in an initializer method could be resolved in the initializer. Subsequent
830 // putfield instructions to the same field would then use cached information.
831 // As a result, those instructions would not pass through the VM. That is,
832 // checks in resolve_field_access() would not be executed for those instructions
833 // and the required IllegalAccessError would not be thrown.
834 //
835 // Also, we need to delay resolving getstatic and putstatic instructions until the
836 // class is initialized. This is required so that access to the static
837 // field will call the initialization function every time until the class
838 // is completely initialized ala. in 2.17.5 in JVM Specification.
839 InstanceKlass* klass = info.field_holder();
840 bool uninitialized_static = is_static && !klass->is_initialized();
841 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
842 info.has_initialized_final_update();
843 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
844
845 Bytecodes::Code get_code = (Bytecodes::Code)0;
846 Bytecodes::Code put_code = (Bytecodes::Code)0;
847 if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) {
848 #if !defined(X86) && !defined(AARCH64)
849 guarantee(!uninitialized_static, "fast class init checks missing in interpreter"); // FIXME
850 #endif // !X86 && !AARCH64
851 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
852 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
853 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
854 }
855 }
856
857 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
858 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
859 entry->fill_in(info.field_holder(), info.offset(),
860 checked_cast<u2>(info.index()), checked_cast<u1>(state),
861 static_cast<u1>(get_code), static_cast<u1>(put_code));
862 }
863
864
865 //------------------------------------------------------------------------------------------------------------------------
866 // Synchronization
867 //
868 // The interpreter's synchronization code is factored out so that it can
869 // be shared by method invocation and synchronized blocks.
870 //%note synchronization_3
871
872 //%note monitor_1
873 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
874 #ifdef ASSERT
875 current->last_frame().interpreter_frame_verify_monitor(elem);
876 #endif
877 Handle h_obj(current, elem->obj());
878 assert(Universe::heap()->is_in_or_null(h_obj()),
879 "must be null or an object");
880 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
881 assert(Universe::heap()->is_in_or_null(elem->obj()),
882 "must be null or an object");
883 #ifdef ASSERT
884 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
885 #endif
886 JRT_END
887
888 JRT_LEAF_PROF_NO_THREAD(void, InterpreterRuntime, monitorexit, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
889 oop obj = elem->obj();
890 assert(Universe::heap()->is_in(obj), "must be an object");
891 // The object could become unlocked through a JNI call, which we have no other checks for.
892 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
893 if (obj->is_unlocked()) {
894 if (CheckJNICalls) {
895 fatal("Object has been unlocked by JNI");
896 }
897 return;
898 }
899 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
900 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
901 // again at method exit or in the case of an exception.
902 elem->set_obj(nullptr);
903 JRT_END
904
905
906 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_illegal_monitor_state_exception,
907 InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
908 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
909 JRT_END
910
911
912 JRT_ENTRY_PROF(void, InterpreterRuntime, new_illegal_monitor_state_exception,
913 InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
914 // Returns an illegal exception to install into the current thread. The
915 // pending_exception flag is cleared so normal exception handling does not
916 // trigger. Any current installed exception will be overwritten. This
917 // method will be called during an exception unwind.
918
919 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
920 Handle exception(current, current->vm_result());
921 assert(exception() != nullptr, "vm result should be set");
922 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
923 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
924 current->set_vm_result(exception());
925 JRT_END
926
927
928 //------------------------------------------------------------------------------------------------------------------------
929 // Invokes
930
931 JRT_ENTRY_PROF(Bytecodes::Code, InterpreterRuntime, get_original_bytecode_at, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
932 return method->orig_bytecode_at(method->bci_from(bcp));
933 JRT_END
934
935 JRT_ENTRY_PROF(void, InterpreterRuntime, set_original_bytecode_at, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
936 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
937 JRT_END
938
939 JRT_ENTRY_PROF(void, InterpreterRuntime, breakpoint, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
940 JvmtiExport::post_raw_breakpoint(current, method, bcp);
941 JRT_END
942
943 PROF_ENTRY(void, InterpreterRuntime, resolve_invokevirtual, InterpreterRuntime::resolve_invokevirtual(JavaThread* current))
944 resolve_invoke(current, Bytecodes::_invokevirtual);
945 PROF_END
946
947 PROF_ENTRY(void, InterpreterRuntime, resolve_invokespecial, InterpreterRuntime::resolve_invokespecial(JavaThread* current))
948 resolve_invoke(current, Bytecodes::_invokespecial);
949 PROF_END
950
951 PROF_ENTRY(void, InterpreterRuntime, resolve_invokestatic, InterpreterRuntime::resolve_invokestatic(JavaThread* current))
952 resolve_invoke(current, Bytecodes::_invokestatic);
953 PROF_END
954
955 PROF_ENTRY(void, InterpreterRuntime, resolve_invokeinterface, InterpreterRuntime::resolve_invokeinterface(JavaThread* current))
956 resolve_invoke(current, Bytecodes::_invokeinterface);
957 PROF_END
958
959 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
960 LastFrameAccessor last_frame(current);
961 // extract receiver from the outgoing argument list if necessary
962 Handle receiver(current, nullptr);
963 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
964 bytecode == Bytecodes::_invokespecial) {
965 ResourceMark rm(current);
966 methodHandle m (current, last_frame.method());
967 Bytecode_invoke call(m, last_frame.bci());
968 Symbol* signature = call.signature();
969 receiver = Handle(current, last_frame.callee_receiver(signature));
970
971 assert(Universe::heap()->is_in_or_null(receiver()),
972 "sanity check");
973 assert(receiver.is_null() ||
974 !Universe::heap()->is_in(receiver->klass()),
975 "sanity check");
976 }
977
978 // resolve method
979 CallInfo info;
980 constantPoolHandle pool(current, last_frame.method()->constants());
981
982 methodHandle resolved_method;
983
984 int method_index = last_frame.get_index_u2(bytecode);
985 {
986 JvmtiHideSingleStepping jhss(current);
987 JavaThread* THREAD = current; // For exception macros.
988 LinkResolver::resolve_invoke(info, receiver, pool,
989 method_index, bytecode,
990 THREAD);
991
992 if (HAS_PENDING_EXCEPTION) {
993 if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
994 // Preserve the original exception across the call to note_trap()
995 PreserveExceptionMark pm(current);
996 // Recording the trap will help the compiler to potentially recognize this exception as "hot"
997 note_trap(current, Deoptimization::Reason_null_check);
998 }
999 return;
1000 }
1001
1002 resolved_method = methodHandle(current, info.resolved_method());
1003 } // end JvmtiHideSingleStepping
1004
1005 update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
1006 }
1007
1008 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
1009 methodHandle& resolved_method,
1010 constantPoolHandle& pool,
1011 int method_index) {
1012 // Don't allow safepoints until the method is cached.
1013 NoSafepointVerifier nsv;
1014
1015 // check if link resolution caused cpCache to be updated
1016 ConstantPoolCache* cache = pool->cache();
1017 if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
1018
1019 #ifdef ASSERT
1020 if (bytecode == Bytecodes::_invokeinterface) {
1021 if (resolved_method->method_holder() == vmClasses::Object_klass()) {
1022 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1023 // (see also CallInfo::set_interface for details)
1024 assert(info.call_kind() == CallInfo::vtable_call ||
1025 info.call_kind() == CallInfo::direct_call, "");
1026 assert(resolved_method->is_final() || info.has_vtable_index(),
1027 "should have been set already");
1028 } else if (!resolved_method->has_itable_index()) {
1029 // Resolved something like CharSequence.toString. Use vtable not itable.
1030 assert(info.call_kind() != CallInfo::itable_call, "");
1031 } else {
1032 // Setup itable entry
1033 assert(info.call_kind() == CallInfo::itable_call, "");
1034 int index = resolved_method->itable_index();
1035 assert(info.itable_index() == index, "");
1036 }
1037 } else if (bytecode == Bytecodes::_invokespecial) {
1038 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1039 } else {
1040 assert(info.call_kind() == CallInfo::direct_call ||
1041 info.call_kind() == CallInfo::vtable_call, "");
1042 }
1043 #endif
1044 // Get sender and only set cpCache entry to resolved if it is not an
1045 // interface. The receiver for invokespecial calls within interface
1046 // methods must be checked for every call.
1047 InstanceKlass* sender = pool->pool_holder();
1048
1049 switch (info.call_kind()) {
1050 case CallInfo::direct_call:
1051 cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
1052 break;
1053 case CallInfo::vtable_call:
1054 cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
1055 break;
1056 case CallInfo::itable_call:
1057 cache->set_itable_call(
1058 bytecode,
1059 method_index,
1060 info.resolved_klass(),
1061 resolved_method,
1062 info.itable_index());
1063 break;
1064 default: ShouldNotReachHere();
1065 }
1066 }
1067
1068 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
1069 constantPoolHandle& pool, TRAPS) {
1070 LinkInfo link_info(pool, method_index, bytecode, CHECK);
1071
1072 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1073 CallInfo call_info;
1074 switch (bytecode) {
1075 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
1076 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1077 case Bytecodes::_invokestatic: LinkResolver::cds_resolve_static_call (call_info, link_info, CHECK); break;
1078 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1079
1080 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1081 }
1082 methodHandle resolved_method(THREAD, call_info.resolved_method());
1083 guarantee(resolved_method->method_holder()->is_linked(), "");
1084 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1085 } else {
1086 // FIXME: why a shared class is not linked yet?
1087 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1088 ResourceMark rm;
1089 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1090 log_info(cds, resolve)("Not resolved: class not linked: %s %s %s",
1091 resolved_iklass->is_shared() ? "is_shared" : "",
1092 resolved_iklass->init_state_name(),
1093 resolved_iklass->external_name());
1094 }
1095 }
1096
1097 // First time execution: Resolve symbols, create a permanent MethodType object.
1098 PROF_ENTRY(void, InterpreterRuntime, resolve_invokehandle, InterpreterRuntime::resolve_invokehandle(JavaThread* current))
1099 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1100 LastFrameAccessor last_frame(current);
1101
1102 // resolve method
1103 CallInfo info;
1104 constantPoolHandle pool(current, last_frame.method()->constants());
1105 int method_index = last_frame.get_index_u2(bytecode);
1106 {
1107 JvmtiHideSingleStepping jhss(current);
1108 JavaThread* THREAD = current; // For exception macros.
1109 LinkResolver::resolve_invoke(info, Handle(), pool,
1110 method_index, bytecode,
1111 CHECK);
1112 } // end JvmtiHideSingleStepping
1113
1114 pool->cache()->set_method_handle(method_index, info);
1115 PROF_END
1116
1117 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1118 constantPoolHandle& pool, TRAPS) {
1119 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1120 CallInfo info;
1121 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1122
1123 pool->cache()->set_method_handle(raw_index, info);
1124 }
1125
1126 // First time execution: Resolve symbols, create a permanent CallSite object.
1127 PROF_ENTRY(void, InterpreterRuntime, resolve_invokedynamic, InterpreterRuntime::resolve_invokedynamic(JavaThread* current))
1128 LastFrameAccessor last_frame(current);
1129 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1130
1131 // resolve method
1132 CallInfo info;
1133 constantPoolHandle pool(current, last_frame.method()->constants());
1134 int index = last_frame.get_index_u4(bytecode);
1135 {
1136 JvmtiHideSingleStepping jhss(current);
1137 JavaThread* THREAD = current; // For exception macros.
1138 LinkResolver::resolve_invoke(info, Handle(), pool,
1139 index, bytecode, CHECK);
1140 } // end JvmtiHideSingleStepping
1141
1142 pool->cache()->set_dynamic_call(info, index);
1143 PROF_END
1144
1145 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1146 constantPoolHandle& pool, TRAPS) {
1147 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1148 CallInfo info;
1149 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1150 pool->cache()->set_dynamic_call(info, raw_index);
1151 }
1152
1153 // This function is the interface to the assembly code. It returns the resolved
1154 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1155 // This function will check for redefinition!
1156 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1157 trace_current_location(current);
1158
1159 switch (bytecode) {
1160 case Bytecodes::_getstatic: resolve_getstatic(current); break;
1161 case Bytecodes::_putstatic: resolve_putstatic(current); break;
1162 case Bytecodes::_getfield: resolve_getfield(current); break;
1163 case Bytecodes::_putfield: resolve_putfield(current); break;
1164
1165 case Bytecodes::_invokevirtual: resolve_invokevirtual(current); break;
1166 case Bytecodes::_invokespecial: resolve_invokespecial(current); break;
1167 case Bytecodes::_invokestatic: resolve_invokestatic(current); break;
1168 case Bytecodes::_invokeinterface: resolve_invokeinterface(current); break;
1169 case Bytecodes::_invokehandle: resolve_invokehandle(current); break;
1170 case Bytecodes::_invokedynamic: resolve_invokedynamic(current); break;
1171
1172 default:
1173 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1174 break;
1175 }
1176 }
1177 JRT_END
1178
1179 //------------------------------------------------------------------------------------------------------------------------
1180 // Miscellaneous
1181
1182
1183 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1184 assert(!PreloadOnly, "Should not be using interpreter counters");
1185
1186 // Enable WXWrite: the function is called directly by interpreter.
1187 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1188
1189 // frequency_counter_overflow_inner can throw async exception.
1190 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1191 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1192 if (branch_bcp != nullptr && nm != nullptr) {
1193 // This was a successful request for an OSR nmethod. Because
1194 // frequency_counter_overflow_inner ends with a safepoint check,
1195 // nm could have been unloaded so look it up again. It's unsafe
1196 // to examine nm directly since it might have been freed and used
1197 // for something else.
1198 LastFrameAccessor last_frame(current);
1199 Method* method = last_frame.method();
1200 int bci = method->bci_from(last_frame.bcp());
1201 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1202 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1203 if (nm != nullptr && bs_nm != nullptr) {
1204 // in case the transition passed a safepoint we need to barrier this again
1205 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1206 nm = nullptr;
1207 }
1208 }
1209 }
1210 if (nm != nullptr && current->is_interp_only_mode()) {
1211 // Normally we never get an nm if is_interp_only_mode() is true, because
1212 // policy()->event has a check for this and won't compile the method when
1213 // true. However, it's possible for is_interp_only_mode() to become true
1214 // during the compilation. We don't want to return the nm in that case
1215 // because we want to continue to execute interpreted.
1216 nm = nullptr;
1217 }
1218 #ifndef PRODUCT
1219 if (TraceOnStackReplacement) {
1220 if (nm != nullptr) {
1221 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1222 nm->print();
1223 }
1224 }
1225 #endif
1226 return nm;
1227 }
1228
1229 JRT_ENTRY_PROF(nmethod*, InterpreterRuntime, frequency_counter_overflow,
1230 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1231 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1232 // flag, in case this method triggers classloading which will call into Java.
1233 UnlockFlagSaver fs(current);
1234
1235 LastFrameAccessor last_frame(current);
1236 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1237 methodHandle method(current, last_frame.method());
1238 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1239 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1240
1241 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1242
1243 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1244 if (osr_nm != nullptr && bs_nm != nullptr) {
1245 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1246 osr_nm = nullptr;
1247 }
1248 }
1249 return osr_nm;
1250 JRT_END
1251
1252 JRT_LEAF_PROF_NO_THREAD(jint, InterpreterRuntime, bcp_to_di, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1253 assert(ProfileInterpreter, "must be profiling interpreter");
1254 int bci = method->bci_from(cur_bcp);
1255 MethodData* mdo = method->method_data();
1256 if (mdo == nullptr) return 0;
1257 return mdo->bci_to_di(bci);
1258 JRT_END
1259
1260 #ifdef ASSERT
1261 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1262 assert(ProfileInterpreter, "must be profiling interpreter");
1263
1264 MethodData* mdo = method->method_data();
1265 assert(mdo != nullptr, "must not be null");
1266
1267 int bci = method->bci_from(bcp);
1268
1269 address mdp2 = mdo->bci_to_dp(bci);
1270 if (mdp != mdp2) {
1271 ResourceMark rm;
1272 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1273 int current_di = mdo->dp_to_di(mdp);
1274 int expected_di = mdo->dp_to_di(mdp2);
1275 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1276 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1277 int approx_bci = -1;
1278 if (current_di >= 0) {
1279 approx_bci = mdo->data_at(current_di)->bci();
1280 }
1281 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1282 mdo->print_on(tty);
1283 method->print_codes();
1284 }
1285 assert(mdp == mdp2, "wrong mdp");
1286 JRT_END
1287 #endif // ASSERT
1288
1289 JRT_ENTRY_PROF(void, InterpreterRuntime, update_mdp_for_ret, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1290 assert(!PreloadOnly, "Should not be using interpreter counters");
1291 assert(ProfileInterpreter, "must be profiling interpreter");
1292 ResourceMark rm(current);
1293 LastFrameAccessor last_frame(current);
1294 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1295 MethodData* h_mdo = last_frame.method()->method_data();
1296
1297 // Grab a lock to ensure atomic access to setting the return bci and
1298 // the displacement. This can block and GC, invalidating all naked oops.
1299 MutexLocker ml(RetData_lock);
1300
1301 // ProfileData is essentially a wrapper around a derived oop, so we
1302 // need to take the lock before making any ProfileData structures.
1303 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1304 guarantee(data != nullptr, "profile data must be valid");
1305 RetData* rdata = data->as_RetData();
1306 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1307 last_frame.set_mdp(new_mdp);
1308 JRT_END
1309
1310 JRT_ENTRY_PROF(MethodCounters*, InterpreterRuntime, build_method_counters, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1311 return Method::build_method_counters(current, m);
1312 JRT_END
1313
1314
1315 JRT_ENTRY_PROF(void, InterpreterRuntime, at_safepoint, InterpreterRuntime::at_safepoint(JavaThread* current))
1316 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1317 // stack traversal automatically takes care of preserving arguments for invoke, so
1318 // this is no longer needed.
1319
1320 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1321 // if this is called during a safepoint
1322
1323 if (JvmtiExport::should_post_single_step()) {
1324 // This function is called by the interpreter when single stepping. Such single
1325 // stepping could unwind a frame. Then, it is important that we process any frames
1326 // that we might return into.
1327 StackWatermarkSet::before_unwind(current);
1328
1329 // We are called during regular safepoints and when the VM is
1330 // single stepping. If any thread is marked for single stepping,
1331 // then we may have JVMTI work to do.
1332 LastFrameAccessor last_frame(current);
1333 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1334 }
1335 JRT_END
1336
1337 JRT_LEAF_PROF(void, InterpreterRuntime, at_unwind, InterpreterRuntime::at_unwind(JavaThread* current))
1338 assert(current == JavaThread::current(), "pre-condition");
1339 // This function is called by the interpreter when the return poll found a reason
1340 // to call the VM. The reason could be that we are returning into a not yet safe
1341 // to access frame. We handle that below.
1342 // Note that this path does not check for single stepping, because we do not want
1343 // to single step when unwinding frames for an exception being thrown. Instead,
1344 // such single stepping code will use the safepoint table, which will use the
1345 // InterpreterRuntime::at_safepoint callback.
1346 StackWatermarkSet::before_unwind(current);
1347 JRT_END
1348
1349 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_access, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1350 ResolvedFieldEntry *entry))
1351
1352 // check the access_flags for the field in the klass
1353
1354 InstanceKlass* ik = entry->field_holder();
1355 int index = entry->field_index();
1356 if (!ik->field_status(index).is_access_watched()) return;
1357
1358 bool is_static = (obj == nullptr);
1359 HandleMark hm(current);
1360
1361 Handle h_obj;
1362 if (!is_static) {
1363 // non-static field accessors have an object, but we need a handle
1364 h_obj = Handle(current, obj);
1365 }
1366 InstanceKlass* field_holder = entry->field_holder(); // HERE
1367 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1368 LastFrameAccessor last_frame(current);
1369 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1370 JRT_END
1371
1372 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_modification, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1373 ResolvedFieldEntry *entry, jvalue *value))
1374
1375 InstanceKlass* ik = entry->field_holder();
1376
1377 // check the access_flags for the field in the klass
1378 int index = entry->field_index();
1379 // bail out if field modifications are not watched
1380 if (!ik->field_status(index).is_modification_watched()) return;
1381
1382 char sig_type = '\0';
1383
1384 switch((TosState)entry->tos_state()) {
1385 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1386 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1387 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1388 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1389 case itos: sig_type = JVM_SIGNATURE_INT; break;
1390 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1391 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1392 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1393 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1394 default: ShouldNotReachHere(); return;
1395 }
1396 bool is_static = (obj == nullptr);
1397
1398 HandleMark hm(current);
1399 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1400 jvalue fvalue;
1401 #ifdef _LP64
1402 fvalue = *value;
1403 #else
1404 // Long/double values are stored unaligned and also noncontiguously with
1405 // tagged stacks. We can't just do a simple assignment even in the non-
1406 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1407 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1408 // We assume that the two halves of longs/doubles are stored in interpreter
1409 // stack slots in platform-endian order.
1410 jlong_accessor u;
1411 jint* newval = (jint*)value;
1412 u.words[0] = newval[0];
1413 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1414 fvalue.j = u.long_value;
1415 #endif // _LP64
1416
1417 Handle h_obj;
1418 if (!is_static) {
1419 // non-static field accessors have an object, but we need a handle
1420 h_obj = Handle(current, obj);
1421 }
1422
1423 LastFrameAccessor last_frame(current);
1424 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1425 fid, sig_type, &fvalue);
1426 JRT_END
1427
1428 JRT_ENTRY_PROF(void, InterpreterRuntime, post_method_entry, InterpreterRuntime::post_method_entry(JavaThread* current))
1429 LastFrameAccessor last_frame(current);
1430 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1431 JRT_END
1432
1433
1434 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1435 // before transitioning to VM, and restore it after transitioning back
1436 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1437 JRT_BLOCK_ENTRY_PROF(void, InterpreterRuntime, post_method_exit, InterpreterRuntime::post_method_exit(JavaThread* current))
1438 LastFrameAccessor last_frame(current);
1439 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1440 JRT_END
1441
1442 JRT_LEAF_PROF_NO_THREAD(int, InterpreterRuntime, interpreter_contains, InterpreterRuntime::interpreter_contains(address pc))
1443 {
1444 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1445 }
1446 JRT_END
1447
1448
1449 // Implementation of SignatureHandlerLibrary
1450
1451 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1452 // Dummy definition (else normalization method is defined in CPU
1453 // dependent code)
1454 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1455 return fingerprint;
1456 }
1457 #endif
1458
1459 address SignatureHandlerLibrary::set_handler_blob() {
1460 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1461 if (handler_blob == nullptr) {
1462 return nullptr;
1463 }
1464 address handler = handler_blob->code_begin();
1465 _handler_blob = handler_blob;
1466 _handler = handler;
1467 return handler;
1468 }
1469
1470 void SignatureHandlerLibrary::initialize() {
1471 if (_fingerprints != nullptr) {
1472 return;
1473 }
1474 if (set_handler_blob() == nullptr) {
1475 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1476 }
1477
1478 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1479 SignatureHandlerLibrary::buffer_size);
1480 _buffer = bb->code_begin();
1481
1482 _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1483 _handlers = new (mtCode) GrowableArray<address>(32, mtCode);
1484 }
1485
1486 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1487 address handler = _handler;
1488 int insts_size = buffer->pure_insts_size();
1489 if (handler + insts_size > _handler_blob->code_end()) {
1490 // get a new handler blob
1491 handler = set_handler_blob();
1492 }
1493 if (handler != nullptr) {
1494 memcpy(handler, buffer->insts_begin(), insts_size);
1495 pd_set_handler(handler);
1496 ICache::invalidate_range(handler, insts_size);
1497 _handler = handler + insts_size;
1498 }
1499 return handler;
1500 }
1501
1502 void SignatureHandlerLibrary::add(const methodHandle& method) {
1503 if (method->signature_handler() == nullptr) {
1504 // use slow signature handler if we can't do better
1505 int handler_index = -1;
1506 // check if we can use customized (fast) signature handler
1507 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1508 // use customized signature handler
1509 MutexLocker mu(SignatureHandlerLibrary_lock);
1510 // make sure data structure is initialized
1511 initialize();
1512 // lookup method signature's fingerprint
1513 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1514 // allow CPU dependent code to optimize the fingerprints for the fast handler
1515 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1516 handler_index = _fingerprints->find(fingerprint);
1517 // create handler if necessary
1518 if (handler_index < 0) {
1519 ResourceMark rm;
1520 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1521 CodeBuffer buffer((address)(_buffer + align_offset),
1522 checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1523 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1524 // copy into code heap
1525 address handler = set_handler(&buffer);
1526 if (handler == nullptr) {
1527 // use slow signature handler (without memorizing it in the fingerprints)
1528 } else {
1529 // debugging support
1530 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1531 ttyLocker ttyl;
1532 tty->cr();
1533 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1534 _handlers->length(),
1535 (method->is_static() ? "static" : "receiver"),
1536 method->name_and_sig_as_C_string(),
1537 fingerprint,
1538 buffer.insts_size());
1539 if (buffer.insts_size() > 0) {
1540 Disassembler::decode(handler, handler + buffer.insts_size(), tty
1541 NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1542 }
1543 #ifndef PRODUCT
1544 address rh_begin = Interpreter::result_handler(method()->result_type());
1545 if (CodeCache::contains(rh_begin)) {
1546 // else it might be special platform dependent values
1547 tty->print_cr(" --- associated result handler ---");
1548 address rh_end = rh_begin;
1549 while (*(int*)rh_end != 0) {
1550 rh_end += sizeof(int);
1551 }
1552 Disassembler::decode(rh_begin, rh_end);
1553 } else {
1554 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1555 }
1556 #endif
1557 }
1558 // add handler to library
1559 _fingerprints->append(fingerprint);
1560 _handlers->append(handler);
1561 // set handler index
1562 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1563 handler_index = _fingerprints->length() - 1;
1564 }
1565 }
1566 // Set handler under SignatureHandlerLibrary_lock
1567 if (handler_index < 0) {
1568 // use generic signature handler
1569 method->set_signature_handler(Interpreter::slow_signature_handler());
1570 } else {
1571 // set handler
1572 method->set_signature_handler(_handlers->at(handler_index));
1573 }
1574 } else {
1575 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1576 // use generic signature handler
1577 method->set_signature_handler(Interpreter::slow_signature_handler());
1578 }
1579 }
1580 #ifdef ASSERT
1581 int handler_index = -1;
1582 int fingerprint_index = -2;
1583 {
1584 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1585 // in any way if accessed from multiple threads. To avoid races with another
1586 // thread which may change the arrays in the above, mutex protected block, we
1587 // have to protect this read access here with the same mutex as well!
1588 MutexLocker mu(SignatureHandlerLibrary_lock);
1589 if (_handlers != nullptr) {
1590 handler_index = _handlers->find(method->signature_handler());
1591 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1592 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1593 fingerprint_index = _fingerprints->find(fingerprint);
1594 }
1595 }
1596 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1597 handler_index == fingerprint_index, "sanity check");
1598 #endif // ASSERT
1599 }
1600
1601 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1602 address SignatureHandlerLibrary::_handler = nullptr;
1603 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1604 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1605 address SignatureHandlerLibrary::_buffer = nullptr;
1606
1607
1608 JRT_ENTRY_PROF(void, InterpreterRuntime, prepare_native_call, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1609 methodHandle m(current, method);
1610 assert(m->is_native(), "sanity check");
1611 // lookup native function entry point if it doesn't exist
1612 if (!m->has_native_function()) {
1613 NativeLookup::lookup(m, CHECK);
1614 }
1615 // make sure signature handler is installed
1616 SignatureHandlerLibrary::add(m);
1617 // The interpreter entry point checks the signature handler first,
1618 // before trying to fetch the native entry point and klass mirror.
1619 // We must set the signature handler last, so that multiple processors
1620 // preparing the same method will be sure to see non-null entry & mirror.
1621 JRT_END
1622
1623 #if defined(IA32) || defined(AMD64) || defined(ARM)
1624 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1625 assert(current == JavaThread::current(), "pre-condition");
1626 if (src_address == dest_address) {
1627 return;
1628 }
1629 ResourceMark rm;
1630 LastFrameAccessor last_frame(current);
1631 assert(last_frame.is_interpreted_frame(), "");
1632 jint bci = last_frame.bci();
1633 methodHandle mh(current, last_frame.method());
1634 Bytecode_invoke invoke(mh, bci);
1635 ArgumentSizeComputer asc(invoke.signature());
1636 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1637 Copy::conjoint_jbytes(src_address, dest_address,
1638 size_of_arguments * Interpreter::stackElementSize);
1639 JRT_END
1640 #endif
1641
1642 #if INCLUDE_JVMTI
1643 // This is a support of the JVMTI PopFrame interface.
1644 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1645 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1646 // The member_name argument is a saved reference (in local#0) to the member_name.
1647 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1648 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1649 JRT_ENTRY_PROF(void, InterpreterRuntime, member_name_arg_or_null,
1650 InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1651 Method* method, address bcp))
1652 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1653 if (code != Bytecodes::_invokestatic) {
1654 return;
1655 }
1656 ConstantPool* cpool = method->constants();
1657 int cp_index = Bytes::get_native_u2(bcp + 1);
1658 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1659 Symbol* mname = cpool->name_ref_at(cp_index, code);
1660
1661 if (MethodHandles::has_member_arg(cname, mname)) {
1662 oop member_name_oop = cast_to_oop(member_name);
1663 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1664 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1665 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1666 }
1667 current->set_vm_result(member_name_oop);
1668 } else {
1669 current->set_vm_result(nullptr);
1670 }
1671 JRT_END
1672 #endif // INCLUDE_JVMTI
1673
1674 #ifndef PRODUCT
1675 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1676 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1677 // The generated code still uses call_VM because that will set up the frame pointer for
1678 // bcp and method.
1679 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1680 assert(current == JavaThread::current(), "pre-condition");
1681 LastFrameAccessor last_frame(current);
1682 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1683 methodHandle mh(current, last_frame.method());
1684 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1685 return preserve_this_value;
1686 JRT_END
1687 #endif // !PRODUCT
1688
1689 #define DO_COUNTERS(macro) \
1690 macro(InterpreterRuntime, ldc) \
1691 macro(InterpreterRuntime, resolve_ldc) \
1692 macro(InterpreterRuntime, new) \
1693 macro(InterpreterRuntime, newarray) \
1694 macro(InterpreterRuntime, anewarray) \
1695 macro(InterpreterRuntime, multianewarray) \
1696 macro(InterpreterRuntime, register_finalizer) \
1697 macro(InterpreterRuntime, quicken_io_cc) \
1698 macro(InterpreterRuntime, throw_StackOverflowError) \
1699 macro(InterpreterRuntime, throw_delayed_StackOverflowError) \
1700 macro(InterpreterRuntime, create_exception) \
1701 macro(InterpreterRuntime, create_klass_exception) \
1702 macro(InterpreterRuntime, throw_ArrayIndexOutOfBoundsException) \
1703 macro(InterpreterRuntime, throw_ClassCastException) \
1704 macro(InterpreterRuntime, exception_handler_for_exception) \
1705 macro(InterpreterRuntime, throw_pending_exception) \
1706 macro(InterpreterRuntime, throw_AbstractMethodError) \
1707 macro(InterpreterRuntime, throw_AbstractMethodErrorWithMethod) \
1708 macro(InterpreterRuntime, throw_AbstractMethodErrorVerbose) \
1709 macro(InterpreterRuntime, throw_IncompatibleClassChangeError) \
1710 macro(InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose) \
1711 macro(InterpreterRuntime, throw_NullPointerException) \
1712 macro(InterpreterRuntime, monitorenter) \
1713 macro(InterpreterRuntime, monitorexit) \
1714 macro(InterpreterRuntime, throw_illegal_monitor_state_exception) \
1715 macro(InterpreterRuntime, new_illegal_monitor_state_exception) \
1716 macro(InterpreterRuntime, get_original_bytecode_at) \
1717 macro(InterpreterRuntime, set_original_bytecode_at) \
1718 macro(InterpreterRuntime, breakpoint) \
1719 macro(InterpreterRuntime, resolve_getfield) \
1720 macro(InterpreterRuntime, resolve_putfield) \
1721 macro(InterpreterRuntime, resolve_getstatic) \
1722 macro(InterpreterRuntime, resolve_putstatic) \
1723 macro(InterpreterRuntime, resolve_invokevirtual) \
1724 macro(InterpreterRuntime, resolve_invokespecial) \
1725 macro(InterpreterRuntime, resolve_invokestatic) \
1726 macro(InterpreterRuntime, resolve_invokeinterface) \
1727 macro(InterpreterRuntime, resolve_invokehandle) \
1728 macro(InterpreterRuntime, resolve_invokedynamic) \
1729 macro(InterpreterRuntime, frequency_counter_overflow) \
1730 macro(InterpreterRuntime, bcp_to_di) \
1731 macro(InterpreterRuntime, update_mdp_for_ret) \
1732 macro(InterpreterRuntime, build_method_counters) \
1733 macro(InterpreterRuntime, at_safepoint) \
1734 macro(InterpreterRuntime, at_unwind) \
1735 macro(InterpreterRuntime, post_field_access) \
1736 macro(InterpreterRuntime, post_field_modification) \
1737 macro(InterpreterRuntime, post_method_entry) \
1738 macro(InterpreterRuntime, post_method_exit) \
1739 macro(InterpreterRuntime, interpreter_contains) \
1740 macro(InterpreterRuntime, prepare_native_call)
1741
1742 #if INCLUDE_JVMTI
1743 #define DO_JVMTI_COUNTERS(macro) \
1744 macro(InterpreterRuntime, member_name_arg_or_null)
1745 #else
1746 #define DO_JVMTI_COUNTERS(macro)
1747 #endif /* INCLUDE_JVMTI */
1748
1749 #define INIT_COUNTER(sub, name) \
1750 NEWPERFTICKCOUNTERS(_perf_##sub##_##name##_timer, SUN_CI, #sub "::" #name); \
1751 NEWPERFEVENTCOUNTER(_perf_##sub##_##name##_count, SUN_CI, #sub "::" #name "_count");
1752
1753 void InterpreterRuntime::init_counters() {
1754 if (UsePerfData) {
1755 EXCEPTION_MARK;
1756
1757 DO_COUNTERS(INIT_COUNTER)
1758 DO_JVMTI_COUNTERS(INIT_COUNTER)
1759
1760 if (HAS_PENDING_EXCEPTION) {
1761 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
1762 }
1763 }
1764 }
1765 #undef INIT_COUNTER
1766
1767 #define PRINT_COUNTER(sub, name) { \
1768 jlong count = _perf_##sub##_##name##_count->get_value(); \
1769 if (count > 0) { \
1770 st->print_cr(" %-50s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
1771 #sub "::" #name, \
1772 _perf_##sub##_##name##_timer->elapsed_counter_value_us(), \
1773 _perf_##sub##_##name##_timer->thread_counter_value_us(), \
1774 count); \
1775 }}
1776
1777 void InterpreterRuntime::print_counters_on(outputStream* st) {
1778 if (UsePerfData && ProfileRuntimeCalls) {
1779 DO_COUNTERS(PRINT_COUNTER)
1780 DO_JVMTI_COUNTERS(PRINT_COUNTER)
1781 } else {
1782 st->print_cr(" InterpreterRuntime: no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
1783 }
1784 }
1785
1786 #undef PRINT_COUNTER
1787 #undef DO_JVMTI_COUNTERS
1788 #undef DO_COUNTERS
1789