1 /*
2 * Copyright (c) 1997, 2019, 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/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/disassembler.hpp"
32 #include "gc/shared/barrierSetNMethod.hpp"
33 #include "gc/shared/collectedHeap.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "interpreter/interpreterRuntime.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "interpreter/templateTable.hpp"
38 #include "logging/log.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "memory/universe.hpp"
42 #include "oops/constantPool.hpp"
43 #include "oops/cpCache.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/methodData.hpp"
46 #include "oops/objArrayKlass.hpp"
47 #include "oops/objArrayOop.inline.hpp"
48 #include "oops/oop.inline.hpp"
49 #include "oops/symbol.hpp"
50 #include "prims/jvmtiExport.hpp"
51 #include "prims/nativeLookup.hpp"
52 #include "runtime/atomic.hpp"
53 #include "runtime/biasedLocking.hpp"
54 #include "runtime/compilationPolicy.hpp"
55 #include "runtime/deoptimization.hpp"
56 #include "runtime/fieldDescriptor.inline.hpp"
57 #include "runtime/frame.inline.hpp"
58 #include "runtime/handles.inline.hpp"
59 #include "runtime/icache.hpp"
60 #include "runtime/interfaceSupport.inline.hpp"
61 #include "runtime/java.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/jfieldIDWorkaround.hpp"
64 #include "runtime/osThread.hpp"
65 #include "runtime/sharedRuntime.hpp"
66 #include "runtime/stubRoutines.hpp"
67 #include "runtime/synchronizer.hpp"
68 #include "runtime/threadCritical.hpp"
69 #include "utilities/align.hpp"
70 #include "utilities/copy.hpp"
71 #include "utilities/events.hpp"
72 #ifdef COMPILER2
73 #include "opto/runtime.hpp"
74 #endif
75
76 class UnlockFlagSaver {
77 private:
78 JavaThread* _thread;
79 bool _do_not_unlock;
80 public:
81 UnlockFlagSaver(JavaThread* t) {
82 _thread = t;
83 _do_not_unlock = t->do_not_unlock_if_synchronized();
84 t->set_do_not_unlock_if_synchronized(false);
85 }
86 ~UnlockFlagSaver() {
87 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
88 }
89 };
90
91 // Helper class to access current interpreter state
92 class LastFrameAccessor : public StackObj {
93 frame _last_frame;
94 public:
95 LastFrameAccessor(JavaThread* thread) {
96 assert(thread == Thread::current(), "sanity");
97 _last_frame = thread->last_frame();
98 }
99 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
100 Method* method() const { return _last_frame.interpreter_frame_method(); }
101 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
102 int bci() const { return _last_frame.interpreter_frame_bci(); }
103 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
104
105 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
106 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
107
108 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
109 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
110
111 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
112 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
113 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
114 int get_index_u2_cpcache(Bytecodes::Code bc) const
115 { return bytecode().get_index_u2_cpcache(bc); }
116 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
117 int number_of_dimensions() const { return bcp()[3]; }
118 ConstantPoolCacheEntry* cache_entry_at(int i) const
119 { return method()->constants()->cache()->entry_at(i); }
120 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
121
122 oop callee_receiver(Symbol* signature) {
123 return _last_frame.interpreter_callee_receiver(signature);
124 }
125 BasicObjectLock* monitor_begin() const {
126 return _last_frame.interpreter_frame_monitor_begin();
127 }
128 BasicObjectLock* monitor_end() const {
129 return _last_frame.interpreter_frame_monitor_end();
130 }
131 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
132 return _last_frame.next_monitor_in_interpreter_frame(current);
133 }
134
135 frame& get_frame() { return _last_frame; }
136 };
137
138 //------------------------------------------------------------------------------------------------------------------------
139 // State accessors
140
141 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
142 LastFrameAccessor last_frame(thread);
143 last_frame.set_bcp(bcp);
144 if (ProfileInterpreter) {
145 // ProfileTraps uses MDOs independently of ProfileInterpreter.
146 // That is why we must check both ProfileInterpreter and mdo != NULL.
147 MethodData* mdo = last_frame.method()->method_data();
148 if (mdo != NULL) {
149 NEEDS_CLEANUP;
150 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
151 }
152 }
153 }
154
155 //------------------------------------------------------------------------------------------------------------------------
156 // Constants
157
158
159 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
160 // access constant pool
161 LastFrameAccessor last_frame(thread);
162 ConstantPool* pool = last_frame.method()->constants();
163 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
164 constantTag tag = pool->tag_at(index);
165
166 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
167 Klass* klass = pool->klass_at(index, CHECK);
168 oop java_class = klass->java_mirror();
169 thread->set_vm_result(java_class);
170 IRT_END
171
172 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
173 assert(bytecode == Bytecodes::_ldc ||
174 bytecode == Bytecodes::_ldc_w ||
175 bytecode == Bytecodes::_ldc2_w ||
176 bytecode == Bytecodes::_fast_aldc ||
177 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
178 ResourceMark rm(thread);
179 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
180 bytecode == Bytecodes::_fast_aldc_w);
181 LastFrameAccessor last_frame(thread);
182 methodHandle m (thread, last_frame.method());
183 Bytecode_loadconstant ldc(m, last_frame.bci());
184
185 // Double-check the size. (Condy can have any type.)
186 BasicType type = ldc.result_type();
187 switch (type2size[type]) {
188 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
189 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
190 default: ShouldNotReachHere();
191 }
192
193 // Resolve the constant. This does not do unboxing.
194 // But it does replace Universe::the_null_sentinel by null.
195 oop result = ldc.resolve_constant(CHECK);
196 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
197
198 #ifdef ASSERT
199 {
200 // The bytecode wrappers aren't GC-safe so construct a new one
201 Bytecode_loadconstant ldc2(m, last_frame.bci());
202 int rindex = ldc2.cache_index();
203 if (rindex < 0)
204 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
205 if (rindex >= 0) {
206 oop coop = m->constants()->resolved_references()->obj_at(rindex);
207 oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
208 assert(oopDesc::equals(roop, coop), "expected result for assembly code");
209 }
210 }
211 #endif
212 thread->set_vm_result(result);
213 if (!is_fast_aldc) {
214 // Tell the interpreter how to unbox the primitive.
215 guarantee(java_lang_boxing_object::is_instance(result, type), "");
216 int offset = java_lang_boxing_object::value_offset_in_bytes(type);
217 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
218 | (offset & ConstantPoolCacheEntry::field_index_mask));
219 thread->set_vm_result_2((Metadata*)flags);
220 }
221 }
222 IRT_END
223
224
225 //------------------------------------------------------------------------------------------------------------------------
226 // Allocation
227
228 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
229 Klass* k = pool->klass_at(index, CHECK);
230 InstanceKlass* klass = InstanceKlass::cast(k);
231
232 // Make sure we are not instantiating an abstract klass
233 klass->check_valid_for_instantiation(true, CHECK);
234
235 // Make sure klass is initialized
236 klass->initialize(CHECK);
237
238 // At this point the class may not be fully initialized
239 // because of recursive initialization. If it is fully
240 // initialized & has_finalized is not set, we rewrite
241 // it into its fast version (Note: no locking is needed
242 // here since this is an atomic byte write and can be
243 // done more than once).
244 //
245 // Note: In case of classes with has_finalized we don't
246 // rewrite since that saves us an extra check in
247 // the fast version which then would call the
248 // slow version anyway (and do a call back into
249 // Java).
250 // If we have a breakpoint, then we don't rewrite
251 // because the _breakpoint bytecode would be lost.
252 oop obj = klass->allocate_instance(CHECK);
253 thread->set_vm_result(obj);
254 IRT_END
255
256
257 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
258 oop obj = oopFactory::new_typeArray(type, size, CHECK);
259 thread->set_vm_result(obj);
260 IRT_END
261
262
263 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
264 Klass* klass = pool->klass_at(index, CHECK);
265 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
266 thread->set_vm_result(obj);
267 IRT_END
268
269
270 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
271 // We may want to pass in more arguments - could make this slightly faster
272 LastFrameAccessor last_frame(thread);
273 ConstantPool* constants = last_frame.method()->constants();
274 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
275 Klass* klass = constants->klass_at(i, CHECK);
276 int nof_dims = last_frame.number_of_dimensions();
277 assert(klass->is_klass(), "not a class");
278 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
279
280 // We must create an array of jints to pass to multi_allocate.
281 ResourceMark rm(thread);
282 const int small_dims = 10;
283 jint dim_array[small_dims];
284 jint *dims = &dim_array[0];
285 if (nof_dims > small_dims) {
286 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
287 }
288 for (int index = 0; index < nof_dims; index++) {
289 // offset from first_size_address is addressed as local[index]
290 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
291 dims[index] = first_size_address[n];
292 }
293 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
294 thread->set_vm_result(obj);
295 IRT_END
296
297
298 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
299 assert(oopDesc::is_oop(obj), "must be a valid oop");
300 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
301 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
302 IRT_END
303
304
305 // Quicken instance-of and check-cast bytecodes
306 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
307 // Force resolving; quicken the bytecode
308 LastFrameAccessor last_frame(thread);
309 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
310 ConstantPool* cpool = last_frame.method()->constants();
311 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
312 // program we might have seen an unquick'd bytecode in the interpreter but have another
313 // thread quicken the bytecode before we get here.
314 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
315 Klass* klass = cpool->klass_at(which, CHECK);
316 thread->set_vm_result_2(klass);
317 IRT_END
318
319
320 //------------------------------------------------------------------------------------------------------------------------
321 // Exceptions
322
323 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
324 const methodHandle& trap_method, int trap_bci, TRAPS) {
325 if (trap_method.not_null()) {
326 MethodData* trap_mdo = trap_method->method_data();
327 if (trap_mdo == NULL) {
328 Method::build_interpreter_method_data(trap_method, THREAD);
329 if (HAS_PENDING_EXCEPTION) {
330 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
331 "we expect only an OOM error here");
332 CLEAR_PENDING_EXCEPTION;
333 }
334 trap_mdo = trap_method->method_data();
335 // and fall through...
336 }
337 if (trap_mdo != NULL) {
338 // Update per-method count of trap events. The interpreter
339 // is updating the MDO to simulate the effect of compiler traps.
340 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
341 }
342 }
343 }
344
345 // Assume the compiler is (or will be) interested in this event.
346 // If necessary, create an MDO to hold the information, and record it.
347 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
348 assert(ProfileTraps, "call me only if profiling");
349 LastFrameAccessor last_frame(thread);
350 methodHandle trap_method(thread, last_frame.method());
351 int trap_bci = trap_method->bci_from(last_frame.bcp());
352 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
353 }
354
355 #ifdef CC_INTERP
356 // As legacy note_trap, but we have more arguments.
357 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
358 methodHandle trap_method(method);
359 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
360 IRT_END
361
362 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
363 // for each exception.
364 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
365 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
366 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
367 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
368 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
369 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
370 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
371 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
372 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
373 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
374 #endif // CC_INTERP
375
376
377 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
378 // get klass
379 InstanceKlass* klass = InstanceKlass::cast(k);
380 assert(klass->is_initialized(),
381 "this klass should have been initialized during VM initialization");
382 // create instance - do not call constructor since we may have no
383 // (java) stack space left (should assert constructor is empty)
384 Handle exception;
385 oop exception_oop = klass->allocate_instance(CHECK_(exception));
386 exception = Handle(THREAD, exception_oop);
387 if (StackTraceInThrowable) {
388 java_lang_Throwable::fill_in_stack_trace(exception);
389 }
390 return exception;
391 }
392
393 // Special handling for stack overflow: since we don't have any (java) stack
394 // space left we use the pre-allocated & pre-initialized StackOverflowError
395 // klass to create an stack overflow error instance. We do not call its
396 // constructor for the same reason (it is empty, anyway).
397 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
398 Handle exception = get_preinitialized_exception(
399 SystemDictionary::StackOverflowError_klass(),
400 CHECK);
401 // Increment counter for hs_err file reporting
402 Atomic::inc(&Exceptions::_stack_overflow_errors);
403 THROW_HANDLE(exception);
404 IRT_END
405
406 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
407 Handle exception = get_preinitialized_exception(
408 SystemDictionary::StackOverflowError_klass(),
409 CHECK);
410 java_lang_Throwable::set_message(exception(),
411 Universe::delayed_stack_overflow_error_message());
412 // Increment counter for hs_err file reporting
413 Atomic::inc(&Exceptions::_stack_overflow_errors);
414 THROW_HANDLE(exception);
415 IRT_END
416
417 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
418 // lookup exception klass
419 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
420 if (ProfileTraps) {
421 if (s == vmSymbols::java_lang_ArithmeticException()) {
422 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
423 } else if (s == vmSymbols::java_lang_NullPointerException()) {
424 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
425 }
426 }
427 // create exception
428 Handle exception = Exceptions::new_exception(thread, s, message);
429 thread->set_vm_result(exception());
430 IRT_END
431
432
433 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
434 // Produce the error message first because note_trap can safepoint
435 ResourceMark rm(thread);
436 const char* klass_name = obj->klass()->external_name();
437 // lookup exception klass
438 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
439 if (ProfileTraps) {
440 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
441 }
442 // create exception, with klass name as detail message
443 Handle exception = Exceptions::new_exception(thread, s, klass_name);
444 thread->set_vm_result(exception());
445 IRT_END
446
447 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, arrayOopDesc* a, jint index))
448 // Produce the error message first because note_trap can safepoint
449 ResourceMark rm(thread);
450 stringStream ss;
451 ss.print("Index %d out of bounds for length %d", index, a->length());
452
453 if (ProfileTraps) {
454 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
455 }
456
457 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
458 IRT_END
459
460 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
461 JavaThread* thread, oopDesc* obj))
462
463 // Produce the error message first because note_trap can safepoint
464 ResourceMark rm(thread);
465 char* message = SharedRuntime::generate_class_cast_message(
466 thread, obj->klass());
467
468 if (ProfileTraps) {
469 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
470 }
471
472 // create exception
473 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
474 IRT_END
475
476 // exception_handler_for_exception(...) returns the continuation address,
477 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
478 // The exception oop is returned to make sure it is preserved over GC (it
479 // is only on the stack if the exception was thrown explicitly via athrow).
480 // During this operation, the expression stack contains the values for the
481 // bci where the exception happened. If the exception was propagated back
482 // from a call, the expression stack contains the values for the bci at the
483 // invoke w/o arguments (i.e., as if one were inside the call).
484 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
485
486 LastFrameAccessor last_frame(thread);
487 Handle h_exception(thread, exception);
488 methodHandle h_method (thread, last_frame.method());
489 constantPoolHandle h_constants(thread, h_method->constants());
490 bool should_repeat;
491 int handler_bci;
492 int current_bci = last_frame.bci();
493
494 if (thread->frames_to_pop_failed_realloc() > 0) {
495 // Allocation of scalar replaced object used in this frame
496 // failed. Unconditionally pop the frame.
497 thread->dec_frames_to_pop_failed_realloc();
498 thread->set_vm_result(h_exception());
499 // If the method is synchronized we already unlocked the monitor
500 // during deoptimization so the interpreter needs to skip it when
501 // the frame is popped.
502 thread->set_do_not_unlock_if_synchronized(true);
503 #ifdef CC_INTERP
504 return (address) -1;
505 #else
506 return Interpreter::remove_activation_entry();
507 #endif
508 }
509
510 // Need to do this check first since when _do_not_unlock_if_synchronized
511 // is set, we don't want to trigger any classloading which may make calls
512 // into java, or surprisingly find a matching exception handler for bci 0
513 // since at this moment the method hasn't been "officially" entered yet.
514 if (thread->do_not_unlock_if_synchronized()) {
515 ResourceMark rm;
516 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
517 thread->set_vm_result(exception);
518 #ifdef CC_INTERP
519 return (address) -1;
520 #else
521 return Interpreter::remove_activation_entry();
522 #endif
523 }
524
525 do {
526 should_repeat = false;
527
528 // assertions
529 #ifdef ASSERT
530 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
531 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
532 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
533 if (ExitVMOnVerifyError) vm_exit(-1);
534 ShouldNotReachHere();
535 }
536 #endif
537
538 // tracing
539 if (log_is_enabled(Info, exceptions)) {
540 ResourceMark rm(thread);
541 stringStream tempst;
542 tempst.print("interpreter method <%s>\n"
543 " at bci %d for thread " INTPTR_FORMAT " (%s)",
544 h_method->print_value_string(), current_bci, p2i(thread), thread->name());
545 Exceptions::log_exception(h_exception, tempst);
546 }
547 // Don't go paging in something which won't be used.
548 // else if (extable->length() == 0) {
549 // // disabled for now - interpreter is not using shortcut yet
550 // // (shortcut is not to call runtime if we have no exception handlers)
551 // // warning("performance bug: should not call runtime if method has no exception handlers");
552 // }
553 // for AbortVMOnException flag
554 Exceptions::debug_check_abort(h_exception);
555
556 // exception handler lookup
557 Klass* klass = h_exception->klass();
558 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
559 if (HAS_PENDING_EXCEPTION) {
560 // We threw an exception while trying to find the exception handler.
561 // Transfer the new exception to the exception handle which will
562 // be set into thread local storage, and do another lookup for an
563 // exception handler for this exception, this time starting at the
564 // BCI of the exception handler which caused the exception to be
565 // thrown (bug 4307310).
566 h_exception = Handle(THREAD, PENDING_EXCEPTION);
567 CLEAR_PENDING_EXCEPTION;
568 if (handler_bci >= 0) {
569 current_bci = handler_bci;
570 should_repeat = true;
571 }
572 }
573 } while (should_repeat == true);
574
575 #if INCLUDE_JVMCI
576 if (EnableJVMCI && h_method->method_data() != NULL) {
577 ResourceMark rm(thread);
578 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
579 if (pdata != NULL && pdata->is_BitData()) {
580 BitData* bit_data = (BitData*) pdata;
581 bit_data->set_exception_seen();
582 }
583 }
584 #endif
585
586 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
587 // time throw or a stack unwinding throw and accordingly notify the debugger
588 if (JvmtiExport::can_post_on_exceptions()) {
589 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
590 }
591
592 #ifdef CC_INTERP
593 address continuation = (address)(intptr_t) handler_bci;
594 #else
595 address continuation = NULL;
596 #endif
597 address handler_pc = NULL;
598 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
599 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
600 // handler in this method, or (b) after a stack overflow there is not yet
601 // enough stack space available to reprotect the stack.
602 #ifndef CC_INTERP
603 continuation = Interpreter::remove_activation_entry();
604 #endif
605 #if COMPILER2_OR_JVMCI
606 // Count this for compilation purposes
607 h_method->interpreter_throwout_increment(THREAD);
608 #endif
609 } else {
610 // handler in this method => change bci/bcp to handler bci/bcp and continue there
611 handler_pc = h_method->code_base() + handler_bci;
612 #ifndef CC_INTERP
613 set_bcp_and_mdp(handler_pc, thread);
614 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
615 #endif
616 }
617 // notify debugger of an exception catch
618 // (this is good for exceptions caught in native methods as well)
619 if (JvmtiExport::can_post_on_exceptions()) {
620 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
621 }
622
623 thread->set_vm_result(h_exception());
624 return continuation;
625 IRT_END
626
627
628 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
629 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
630 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
631 IRT_END
632
633
634 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
635 THROW(vmSymbols::java_lang_AbstractMethodError());
636 IRT_END
637
638 // This method is called from the "abstract_entry" of the interpreter.
639 // At that point, the arguments have already been removed from the stack
640 // and therefore we don't have the receiver object at our fingertips. (Though,
641 // on some platforms the receiver still resides in a register...). Thus,
642 // we have no choice but print an error message not containing the receiver
643 // type.
644 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* thread,
645 Method* missingMethod))
646 ResourceMark rm(thread);
647 assert(missingMethod != NULL, "sanity");
648 methodHandle m(thread, missingMethod);
649 LinkResolver::throw_abstract_method_error(m, THREAD);
650 IRT_END
651
652 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* thread,
653 Klass* recvKlass,
654 Method* missingMethod))
655 ResourceMark rm(thread);
656 methodHandle mh = methodHandle(thread, missingMethod);
657 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
658 IRT_END
659
660
661 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
662 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
663 IRT_END
664
665 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* thread,
666 Klass* recvKlass,
667 Klass* interfaceKlass))
668 ResourceMark rm(thread);
669 char buf[1000];
670 buf[0] = '\0';
671 jio_snprintf(buf, sizeof(buf),
672 "Class %s does not implement the requested interface %s",
673 recvKlass ? recvKlass->external_name() : "NULL",
674 interfaceKlass ? interfaceKlass->external_name() : "NULL");
675 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
676 IRT_END
677
678 //------------------------------------------------------------------------------------------------------------------------
679 // Fields
680 //
681
682 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
683 Thread* THREAD = thread;
684 // resolve field
685 fieldDescriptor info;
686 LastFrameAccessor last_frame(thread);
687 constantPoolHandle pool(thread, last_frame.method()->constants());
688 methodHandle m(thread, last_frame.method());
689 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
690 bytecode == Bytecodes::_putstatic);
691 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
692
693 {
694 JvmtiHideSingleStepping jhss(thread);
695 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
696 m, bytecode, CHECK);
697 } // end JvmtiHideSingleStepping
698
699 // check if link resolution caused cpCache to be updated
700 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
701 if (cp_cache_entry->is_resolved(bytecode)) return;
702
703 // compute auxiliary field attributes
704 TosState state = as_TosState(info.field_type());
705
706 // Resolution of put instructions on final fields is delayed. That is required so that
707 // exceptions are thrown at the correct place (when the instruction is actually invoked).
708 // If we do not resolve an instruction in the current pass, leaving the put_code
709 // set to zero will cause the next put instruction to the same field to reresolve.
710
711 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
712 // to final instance fields with updates originating from a method different than <init>)
713 // is inhibited. A putfield instruction targeting an instance final field must throw
714 // an IllegalAccessError if the instruction is not in an instance
715 // initializer method <init>. If resolution were not inhibited, a putfield
716 // in an initializer method could be resolved in the initializer. Subsequent
717 // putfield instructions to the same field would then use cached information.
718 // As a result, those instructions would not pass through the VM. That is,
719 // checks in resolve_field_access() would not be executed for those instructions
720 // and the required IllegalAccessError would not be thrown.
721 //
722 // Also, we need to delay resolving getstatic and putstatic instructions until the
723 // class is initialized. This is required so that access to the static
724 // field will call the initialization function every time until the class
725 // is completely initialized ala. in 2.17.5 in JVM Specification.
726 InstanceKlass* klass = info.field_holder();
727 bool uninitialized_static = is_static && !klass->is_initialized();
728 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
729 info.has_initialized_final_update();
730 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
731
732 Bytecodes::Code get_code = (Bytecodes::Code)0;
733 Bytecodes::Code put_code = (Bytecodes::Code)0;
734 if (!uninitialized_static) {
735 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
736 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
737 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
738 }
739 }
740
741 cp_cache_entry->set_field(
742 get_code,
743 put_code,
744 info.field_holder(),
745 info.index(),
746 info.offset(),
747 state,
748 info.access_flags().is_final(),
749 info.access_flags().is_volatile(),
750 pool->pool_holder()
751 );
752 }
753
754
755 //------------------------------------------------------------------------------------------------------------------------
756 // Synchronization
757 //
758 // The interpreter's synchronization code is factored out so that it can
759 // be shared by method invocation and synchronized blocks.
760 //%note synchronization_3
761
762 //%note monitor_1
763 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
764 #ifdef ASSERT
765 thread->last_frame().interpreter_frame_verify_monitor(elem);
766 #endif
767 if (PrintBiasedLockingStatistics) {
768 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
769 }
770 Handle h_obj(thread, elem->obj());
771 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
772 "must be NULL or an object");
773 if (UseBiasedLocking) {
774 // Retry fast entry if bias is revoked to avoid unnecessary inflation
775 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
776 } else {
777 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
778 }
779 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
780 "must be NULL or an object");
781 #ifdef ASSERT
782 thread->last_frame().interpreter_frame_verify_monitor(elem);
783 #endif
784 IRT_END
785
786
787 //%note monitor_1
788 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
789 #ifdef ASSERT
790 thread->last_frame().interpreter_frame_verify_monitor(elem);
791 #endif
792 Handle h_obj(thread, elem->obj());
793 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
794 "must be NULL or an object");
795 if (elem == NULL || h_obj()->is_unlocked()) {
796 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
797 }
798 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
799 // Free entry. This must be done here, since a pending exception might be installed on
800 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
801 elem->set_obj(NULL);
802 #ifdef ASSERT
803 thread->last_frame().interpreter_frame_verify_monitor(elem);
804 #endif
805 IRT_END
806
807
808 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
809 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
810 IRT_END
811
812
813 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
814 // Returns an illegal exception to install into the current thread. The
815 // pending_exception flag is cleared so normal exception handling does not
816 // trigger. Any current installed exception will be overwritten. This
817 // method will be called during an exception unwind.
818
819 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
820 Handle exception(thread, thread->vm_result());
821 assert(exception() != NULL, "vm result should be set");
822 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
823 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
824 exception = get_preinitialized_exception(
825 SystemDictionary::IllegalMonitorStateException_klass(),
826 CATCH);
827 }
828 thread->set_vm_result(exception());
829 IRT_END
830
831
832 //------------------------------------------------------------------------------------------------------------------------
833 // Invokes
834
835 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
836 return method->orig_bytecode_at(method->bci_from(bcp));
837 IRT_END
838
839 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
840 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
841 IRT_END
842
843 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
844 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
845 IRT_END
846
847 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
848 Thread* THREAD = thread;
849 LastFrameAccessor last_frame(thread);
850 // extract receiver from the outgoing argument list if necessary
851 Handle receiver(thread, NULL);
852 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
853 bytecode == Bytecodes::_invokespecial) {
854 ResourceMark rm(thread);
855 methodHandle m (thread, last_frame.method());
856 Bytecode_invoke call(m, last_frame.bci());
857 Symbol* signature = call.signature();
858 receiver = Handle(thread, last_frame.callee_receiver(signature));
859
860 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
861 "sanity check");
862 assert(receiver.is_null() ||
863 !Universe::heap()->is_in_reserved(receiver->klass()),
864 "sanity check");
865 }
866
867 // resolve method
868 CallInfo info;
869 constantPoolHandle pool(thread, last_frame.method()->constants());
870
871 {
872 JvmtiHideSingleStepping jhss(thread);
873 LinkResolver::resolve_invoke(info, receiver, pool,
874 last_frame.get_index_u2_cpcache(bytecode), bytecode,
875 CHECK);
876 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
877 int retry_count = 0;
878 while (info.resolved_method()->is_old()) {
879 // It is very unlikely that method is redefined more than 100 times
880 // in the middle of resolve. If it is looping here more than 100 times
881 // means then there could be a bug here.
882 guarantee((retry_count++ < 100),
883 "Could not resolve to latest version of redefined method");
884 // method is redefined in the middle of resolve so re-try.
885 LinkResolver::resolve_invoke(info, receiver, pool,
886 last_frame.get_index_u2_cpcache(bytecode), bytecode,
887 CHECK);
888 }
889 }
890 } // end JvmtiHideSingleStepping
891
892 // check if link resolution caused cpCache to be updated
893 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
894 if (cp_cache_entry->is_resolved(bytecode)) return;
895
896 #ifdef ASSERT
897 if (bytecode == Bytecodes::_invokeinterface) {
898 if (info.resolved_method()->method_holder() ==
899 SystemDictionary::Object_klass()) {
900 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
901 // (see also CallInfo::set_interface for details)
902 assert(info.call_kind() == CallInfo::vtable_call ||
903 info.call_kind() == CallInfo::direct_call, "");
904 methodHandle rm = info.resolved_method();
905 assert(rm->is_final() || info.has_vtable_index(),
906 "should have been set already");
907 } else if (!info.resolved_method()->has_itable_index()) {
908 // Resolved something like CharSequence.toString. Use vtable not itable.
909 assert(info.call_kind() != CallInfo::itable_call, "");
910 } else {
911 // Setup itable entry
912 assert(info.call_kind() == CallInfo::itable_call, "");
913 int index = info.resolved_method()->itable_index();
914 assert(info.itable_index() == index, "");
915 }
916 } else if (bytecode == Bytecodes::_invokespecial) {
917 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
918 } else {
919 assert(info.call_kind() == CallInfo::direct_call ||
920 info.call_kind() == CallInfo::vtable_call, "");
921 }
922 #endif
923 // Get sender or sender's unsafe_anonymous_host, and only set cpCache entry to resolved if
924 // it is not an interface. The receiver for invokespecial calls within interface
925 // methods must be checked for every call.
926 InstanceKlass* sender = pool->pool_holder();
927 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
928
929 switch (info.call_kind()) {
930 case CallInfo::direct_call:
931 cp_cache_entry->set_direct_call(
932 bytecode,
933 info.resolved_method(),
934 sender->is_interface());
935 break;
936 case CallInfo::vtable_call:
937 cp_cache_entry->set_vtable_call(
938 bytecode,
939 info.resolved_method(),
940 info.vtable_index());
941 break;
942 case CallInfo::itable_call:
943 cp_cache_entry->set_itable_call(
944 bytecode,
945 info.resolved_klass(),
946 info.resolved_method(),
947 info.itable_index());
948 break;
949 default: ShouldNotReachHere();
950 }
951 }
952
953
954 // First time execution: Resolve symbols, create a permanent MethodType object.
955 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
956 Thread* THREAD = thread;
957 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
958 LastFrameAccessor last_frame(thread);
959
960 // resolve method
961 CallInfo info;
962 constantPoolHandle pool(thread, last_frame.method()->constants());
963 {
964 JvmtiHideSingleStepping jhss(thread);
965 LinkResolver::resolve_invoke(info, Handle(), pool,
966 last_frame.get_index_u2_cpcache(bytecode), bytecode,
967 CHECK);
968 } // end JvmtiHideSingleStepping
969
970 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
971 cp_cache_entry->set_method_handle(pool, info);
972 }
973
974 // First time execution: Resolve symbols, create a permanent CallSite object.
975 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
976 Thread* THREAD = thread;
977 LastFrameAccessor last_frame(thread);
978 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
979
980 // resolve method
981 CallInfo info;
982 constantPoolHandle pool(thread, last_frame.method()->constants());
983 int index = last_frame.get_index_u4(bytecode);
984 {
985 JvmtiHideSingleStepping jhss(thread);
986 LinkResolver::resolve_invoke(info, Handle(), pool,
987 index, bytecode, CHECK);
988 } // end JvmtiHideSingleStepping
989
990 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
991 cp_cache_entry->set_dynamic_call(pool, info);
992 }
993
994 // This function is the interface to the assembly code. It returns the resolved
995 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
996 // This function will check for redefinition!
997 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
998 switch (bytecode) {
999 case Bytecodes::_getstatic:
1000 case Bytecodes::_putstatic:
1001 case Bytecodes::_getfield:
1002 case Bytecodes::_putfield:
1003 resolve_get_put(thread, bytecode);
1004 break;
1005 case Bytecodes::_invokevirtual:
1006 case Bytecodes::_invokespecial:
1007 case Bytecodes::_invokestatic:
1008 case Bytecodes::_invokeinterface:
1009 resolve_invoke(thread, bytecode);
1010 break;
1011 case Bytecodes::_invokehandle:
1012 resolve_invokehandle(thread);
1013 break;
1014 case Bytecodes::_invokedynamic:
1015 resolve_invokedynamic(thread);
1016 break;
1017 default:
1018 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1019 break;
1020 }
1021 }
1022 IRT_END
1023
1024 //------------------------------------------------------------------------------------------------------------------------
1025 // Miscellaneous
1026
1027
1028 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1029 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1030 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1031 if (branch_bcp != NULL && nm != NULL) {
1032 // This was a successful request for an OSR nmethod. Because
1033 // frequency_counter_overflow_inner ends with a safepoint check,
1034 // nm could have been unloaded so look it up again. It's unsafe
1035 // to examine nm directly since it might have been freed and used
1036 // for something else.
1037 LastFrameAccessor last_frame(thread);
1038 Method* method = last_frame.method();
1039 int bci = method->bci_from(last_frame.bcp());
1040 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1041 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1042 if (nm != NULL && bs_nm != NULL) {
1043 // in case the transition passed a safepoint we need to barrier this again
1044 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1045 nm = NULL;
1046 }
1047 }
1048 }
1049 if (nm != NULL && thread->is_interp_only_mode()) {
1050 // Normally we never get an nm if is_interp_only_mode() is true, because
1051 // policy()->event has a check for this and won't compile the method when
1052 // true. However, it's possible for is_interp_only_mode() to become true
1053 // during the compilation. We don't want to return the nm in that case
1054 // because we want to continue to execute interpreted.
1055 nm = NULL;
1056 }
1057 #ifndef PRODUCT
1058 if (TraceOnStackReplacement) {
1059 if (nm != NULL) {
1060 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1061 nm->print();
1062 }
1063 }
1064 #endif
1065 return nm;
1066 }
1067
1068 IRT_ENTRY(nmethod*,
1069 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1070 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1071 // flag, in case this method triggers classloading which will call into Java.
1072 UnlockFlagSaver fs(thread);
1073
1074 LastFrameAccessor last_frame(thread);
1075 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1076 methodHandle method(thread, last_frame.method());
1077 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1078 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1079
1080 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1081 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1082 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1083
1084 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1085 if (osr_nm != NULL && bs_nm != NULL) {
1086 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1087 osr_nm = NULL;
1088 }
1089 }
1090
1091 if (osr_nm != NULL) {
1092 // We may need to do on-stack replacement which requires that no
1093 // monitors in the activation are biased because their
1094 // BasicObjectLocks will need to migrate during OSR. Force
1095 // unbiasing of all monitors in the activation now (even though
1096 // the OSR nmethod might be invalidated) because we don't have a
1097 // safepoint opportunity later once the migration begins.
1098 if (UseBiasedLocking) {
1099 ResourceMark rm;
1100 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1101 for( BasicObjectLock *kptr = last_frame.monitor_end();
1102 kptr < last_frame.monitor_begin();
1103 kptr = last_frame.next_monitor(kptr) ) {
1104 if( kptr->obj() != NULL ) {
1105 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1106 }
1107 }
1108 BiasedLocking::revoke(objects_to_revoke);
1109 }
1110 }
1111 return osr_nm;
1112 IRT_END
1113
1114 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1115 assert(ProfileInterpreter, "must be profiling interpreter");
1116 int bci = method->bci_from(cur_bcp);
1117 MethodData* mdo = method->method_data();
1118 if (mdo == NULL) return 0;
1119 return mdo->bci_to_di(bci);
1120 IRT_END
1121
1122 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1123 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1124 // flag, in case this method triggers classloading which will call into Java.
1125 UnlockFlagSaver fs(thread);
1126
1127 assert(ProfileInterpreter, "must be profiling interpreter");
1128 LastFrameAccessor last_frame(thread);
1129 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1130 methodHandle method(thread, last_frame.method());
1131 Method::build_interpreter_method_data(method, THREAD);
1132 if (HAS_PENDING_EXCEPTION) {
1133 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1134 CLEAR_PENDING_EXCEPTION;
1135 // and fall through...
1136 }
1137 IRT_END
1138
1139
1140 #ifdef ASSERT
1141 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1142 assert(ProfileInterpreter, "must be profiling interpreter");
1143
1144 MethodData* mdo = method->method_data();
1145 assert(mdo != NULL, "must not be null");
1146
1147 int bci = method->bci_from(bcp);
1148
1149 address mdp2 = mdo->bci_to_dp(bci);
1150 if (mdp != mdp2) {
1151 ResourceMark rm;
1152 ResetNoHandleMark rnm; // In a LEAF entry.
1153 HandleMark hm;
1154 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1155 int current_di = mdo->dp_to_di(mdp);
1156 int expected_di = mdo->dp_to_di(mdp2);
1157 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1158 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1159 int approx_bci = -1;
1160 if (current_di >= 0) {
1161 approx_bci = mdo->data_at(current_di)->bci();
1162 }
1163 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1164 mdo->print_on(tty);
1165 method->print_codes();
1166 }
1167 assert(mdp == mdp2, "wrong mdp");
1168 IRT_END
1169 #endif // ASSERT
1170
1171 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1172 assert(ProfileInterpreter, "must be profiling interpreter");
1173 ResourceMark rm(thread);
1174 HandleMark hm(thread);
1175 LastFrameAccessor last_frame(thread);
1176 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1177 MethodData* h_mdo = last_frame.method()->method_data();
1178
1179 // Grab a lock to ensure atomic access to setting the return bci and
1180 // the displacement. This can block and GC, invalidating all naked oops.
1181 MutexLocker ml(RetData_lock);
1182
1183 // ProfileData is essentially a wrapper around a derived oop, so we
1184 // need to take the lock before making any ProfileData structures.
1185 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1186 guarantee(data != NULL, "profile data must be valid");
1187 RetData* rdata = data->as_RetData();
1188 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1189 last_frame.set_mdp(new_mdp);
1190 IRT_END
1191
1192 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1193 MethodCounters* mcs = Method::build_method_counters(m, thread);
1194 if (HAS_PENDING_EXCEPTION) {
1195 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1196 CLEAR_PENDING_EXCEPTION;
1197 }
1198 return mcs;
1199 IRT_END
1200
1201
1202 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1203 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1204 // stack traversal automatically takes care of preserving arguments for invoke, so
1205 // this is no longer needed.
1206
1207 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1208 // if this is called during a safepoint
1209
1210 if (JvmtiExport::should_post_single_step()) {
1211 // We are called during regular safepoints and when the VM is
1212 // single stepping. If any thread is marked for single stepping,
1213 // then we may have JVMTI work to do.
1214 LastFrameAccessor last_frame(thread);
1215 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1216 }
1217 IRT_END
1218
1219 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1220 ConstantPoolCacheEntry *cp_entry))
1221
1222 // check the access_flags for the field in the klass
1223
1224 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1225 int index = cp_entry->field_index();
1226 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1227
1228 bool is_static = (obj == NULL);
1229 HandleMark hm(thread);
1230
1231 Handle h_obj;
1232 if (!is_static) {
1233 // non-static field accessors have an object, but we need a handle
1234 h_obj = Handle(thread, obj);
1235 }
1236 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1237 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1238 LastFrameAccessor last_frame(thread);
1239 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1240 IRT_END
1241
1242 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1243 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1244
1245 Klass* k = cp_entry->f1_as_klass();
1246
1247 // check the access_flags for the field in the klass
1248 InstanceKlass* ik = InstanceKlass::cast(k);
1249 int index = cp_entry->field_index();
1250 // bail out if field modifications are not watched
1251 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1252
1253 char sig_type = '\0';
1254
1255 switch(cp_entry->flag_state()) {
1256 case btos: sig_type = 'B'; break;
1257 case ztos: sig_type = 'Z'; break;
1258 case ctos: sig_type = 'C'; break;
1259 case stos: sig_type = 'S'; break;
1260 case itos: sig_type = 'I'; break;
1261 case ftos: sig_type = 'F'; break;
1262 case atos: sig_type = 'L'; break;
1263 case ltos: sig_type = 'J'; break;
1264 case dtos: sig_type = 'D'; break;
1265 default: ShouldNotReachHere(); return;
1266 }
1267 bool is_static = (obj == NULL);
1268
1269 HandleMark hm(thread);
1270 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1271 jvalue fvalue;
1272 #ifdef _LP64
1273 fvalue = *value;
1274 #else
1275 // Long/double values are stored unaligned and also noncontiguously with
1276 // tagged stacks. We can't just do a simple assignment even in the non-
1277 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1278 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1279 // We assume that the two halves of longs/doubles are stored in interpreter
1280 // stack slots in platform-endian order.
1281 jlong_accessor u;
1282 jint* newval = (jint*)value;
1283 u.words[0] = newval[0];
1284 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1285 fvalue.j = u.long_value;
1286 #endif // _LP64
1287
1288 Handle h_obj;
1289 if (!is_static) {
1290 // non-static field accessors have an object, but we need a handle
1291 h_obj = Handle(thread, obj);
1292 }
1293
1294 LastFrameAccessor last_frame(thread);
1295 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1296 fid, sig_type, &fvalue);
1297 IRT_END
1298
1299 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1300 LastFrameAccessor last_frame(thread);
1301 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1302 IRT_END
1303
1304
1305 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1306 LastFrameAccessor last_frame(thread);
1307 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1308 IRT_END
1309
1310 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1311 {
1312 return (Interpreter::contains(pc) ? 1 : 0);
1313 }
1314 IRT_END
1315
1316
1317 // Implementation of SignatureHandlerLibrary
1318
1319 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1320 // Dummy definition (else normalization method is defined in CPU
1321 // dependant code)
1322 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1323 return fingerprint;
1324 }
1325 #endif
1326
1327 address SignatureHandlerLibrary::set_handler_blob() {
1328 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1329 if (handler_blob == NULL) {
1330 return NULL;
1331 }
1332 address handler = handler_blob->code_begin();
1333 _handler_blob = handler_blob;
1334 _handler = handler;
1335 return handler;
1336 }
1337
1338 void SignatureHandlerLibrary::initialize() {
1339 if (_fingerprints != NULL) {
1340 return;
1341 }
1342 if (set_handler_blob() == NULL) {
1343 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1344 }
1345
1346 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1347 SignatureHandlerLibrary::buffer_size);
1348 _buffer = bb->code_begin();
1349
1350 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1351 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1352 }
1353
1354 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1355 address handler = _handler;
1356 int insts_size = buffer->pure_insts_size();
1357 if (handler + insts_size > _handler_blob->code_end()) {
1358 // get a new handler blob
1359 handler = set_handler_blob();
1360 }
1361 if (handler != NULL) {
1362 memcpy(handler, buffer->insts_begin(), insts_size);
1363 pd_set_handler(handler);
1364 ICache::invalidate_range(handler, insts_size);
1365 _handler = handler + insts_size;
1366 }
1367 return handler;
1368 }
1369
1370 void SignatureHandlerLibrary::add(const methodHandle& method) {
1371 if (method->signature_handler() == NULL) {
1372 // use slow signature handler if we can't do better
1373 int handler_index = -1;
1374 // check if we can use customized (fast) signature handler
1375 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1376 // use customized signature handler
1377 MutexLocker mu(SignatureHandlerLibrary_lock);
1378 // make sure data structure is initialized
1379 initialize();
1380 // lookup method signature's fingerprint
1381 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1382 // allow CPU dependant code to optimize the fingerprints for the fast handler
1383 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1384 handler_index = _fingerprints->find(fingerprint);
1385 // create handler if necessary
1386 if (handler_index < 0) {
1387 ResourceMark rm;
1388 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1389 CodeBuffer buffer((address)(_buffer + align_offset),
1390 SignatureHandlerLibrary::buffer_size - align_offset);
1391 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1392 // copy into code heap
1393 address handler = set_handler(&buffer);
1394 if (handler == NULL) {
1395 // use slow signature handler (without memorizing it in the fingerprints)
1396 } else {
1397 // debugging suppport
1398 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1399 ttyLocker ttyl;
1400 tty->cr();
1401 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1402 _handlers->length(),
1403 (method->is_static() ? "static" : "receiver"),
1404 method->name_and_sig_as_C_string(),
1405 fingerprint,
1406 buffer.insts_size());
1407 if (buffer.insts_size() > 0) {
1408 Disassembler::decode(handler, handler + buffer.insts_size());
1409 }
1410 #ifndef PRODUCT
1411 address rh_begin = Interpreter::result_handler(method()->result_type());
1412 if (CodeCache::contains(rh_begin)) {
1413 // else it might be special platform dependent values
1414 tty->print_cr(" --- associated result handler ---");
1415 address rh_end = rh_begin;
1416 while (*(int*)rh_end != 0) {
1417 rh_end += sizeof(int);
1418 }
1419 Disassembler::decode(rh_begin, rh_end);
1420 } else {
1421 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1422 }
1423 #endif
1424 }
1425 // add handler to library
1426 _fingerprints->append(fingerprint);
1427 _handlers->append(handler);
1428 // set handler index
1429 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1430 handler_index = _fingerprints->length() - 1;
1431 }
1432 }
1433 // Set handler under SignatureHandlerLibrary_lock
1434 if (handler_index < 0) {
1435 // use generic signature handler
1436 method->set_signature_handler(Interpreter::slow_signature_handler());
1437 } else {
1438 // set handler
1439 method->set_signature_handler(_handlers->at(handler_index));
1440 }
1441 } else {
1442 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1443 // use generic signature handler
1444 method->set_signature_handler(Interpreter::slow_signature_handler());
1445 }
1446 }
1447 #ifdef ASSERT
1448 int handler_index = -1;
1449 int fingerprint_index = -2;
1450 {
1451 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1452 // in any way if accessed from multiple threads. To avoid races with another
1453 // thread which may change the arrays in the above, mutex protected block, we
1454 // have to protect this read access here with the same mutex as well!
1455 MutexLocker mu(SignatureHandlerLibrary_lock);
1456 if (_handlers != NULL) {
1457 handler_index = _handlers->find(method->signature_handler());
1458 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1459 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1460 fingerprint_index = _fingerprints->find(fingerprint);
1461 }
1462 }
1463 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1464 handler_index == fingerprint_index, "sanity check");
1465 #endif // ASSERT
1466 }
1467
1468 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1469 int handler_index = -1;
1470 // use customized signature handler
1471 MutexLocker mu(SignatureHandlerLibrary_lock);
1472 // make sure data structure is initialized
1473 initialize();
1474 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1475 handler_index = _fingerprints->find(fingerprint);
1476 // create handler if necessary
1477 if (handler_index < 0) {
1478 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1479 tty->cr();
1480 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1481 _handlers->length(),
1482 p2i(handler),
1483 fingerprint);
1484 }
1485 _fingerprints->append(fingerprint);
1486 _handlers->append(handler);
1487 } else {
1488 if (PrintSignatureHandlers) {
1489 tty->cr();
1490 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1491 _handlers->length(),
1492 fingerprint,
1493 p2i(_handlers->at(handler_index)),
1494 p2i(handler));
1495 }
1496 }
1497 }
1498
1499
1500 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1501 address SignatureHandlerLibrary::_handler = NULL;
1502 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1503 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1504 address SignatureHandlerLibrary::_buffer = NULL;
1505
1506
1507 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1508 methodHandle m(thread, method);
1509 assert(m->is_native(), "sanity check");
1510 // lookup native function entry point if it doesn't exist
1511 bool in_base_library;
1512 if (!m->has_native_function()) {
1513 NativeLookup::lookup(m, in_base_library, CHECK);
1514 }
1515 // make sure signature handler is installed
1516 SignatureHandlerLibrary::add(m);
1517 // The interpreter entry point checks the signature handler first,
1518 // before trying to fetch the native entry point and klass mirror.
1519 // We must set the signature handler last, so that multiple processors
1520 // preparing the same method will be sure to see non-null entry & mirror.
1521 IRT_END
1522
1523 #if defined(IA32) || defined(AMD64) || defined(ARM)
1524 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1525 if (src_address == dest_address) {
1526 return;
1527 }
1528 ResetNoHandleMark rnm; // In a LEAF entry.
1529 HandleMark hm;
1530 ResourceMark rm;
1531 LastFrameAccessor last_frame(thread);
1532 assert(last_frame.is_interpreted_frame(), "");
1533 jint bci = last_frame.bci();
1534 methodHandle mh(thread, last_frame.method());
1535 Bytecode_invoke invoke(mh, bci);
1536 ArgumentSizeComputer asc(invoke.signature());
1537 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1538 Copy::conjoint_jbytes(src_address, dest_address,
1539 size_of_arguments * Interpreter::stackElementSize);
1540 IRT_END
1541 #endif
1542
1543 #if INCLUDE_JVMTI
1544 // This is a support of the JVMTI PopFrame interface.
1545 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1546 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1547 // The member_name argument is a saved reference (in local#0) to the member_name.
1548 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1549 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1550 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1551 Method* method, address bcp))
1552 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1553 if (code != Bytecodes::_invokestatic) {
1554 return;
1555 }
1556 ConstantPool* cpool = method->constants();
1557 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1558 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1559 Symbol* mname = cpool->name_ref_at(cp_index);
1560
1561 if (MethodHandles::has_member_arg(cname, mname)) {
1562 oop member_name_oop = (oop) member_name;
1563 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1564 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1565 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1566 }
1567 thread->set_vm_result(member_name_oop);
1568 } else {
1569 thread->set_vm_result(NULL);
1570 }
1571 IRT_END
1572 #endif // INCLUDE_JVMTI
1573
1574 #ifndef PRODUCT
1575 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1576 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1577 // The generated code still uses call_VM because that will set up the frame pointer for
1578 // bcp and method.
1579 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1580 LastFrameAccessor last_frame(thread);
1581 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1582 methodHandle mh(thread, last_frame.method());
1583 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1584 return preserve_this_value;
1585 IRT_END
1586 #endif // !PRODUCT