1 /*
2 * Copyright (c) 1997, 2018, 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/collectedHeap.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "interpreter/interpreterRuntime.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "interpreter/templateTable.hpp"
37 #include "logging/log.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "memory/universe.hpp"
41 #include "oops/constantPool.hpp"
42 #include "oops/cpCache.inline.hpp"
43 #include "oops/instanceKlass.hpp"
44 #include "oops/methodData.hpp"
45 #include "oops/objArrayKlass.hpp"
46 #include "oops/objArrayOop.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/symbol.hpp"
49 #include "prims/jvmtiExport.hpp"
50 #include "prims/nativeLookup.hpp"
51 #include "runtime/atomic.hpp"
52 #include "runtime/biasedLocking.hpp"
53 #include "runtime/compilationPolicy.hpp"
54 #include "runtime/deoptimization.hpp"
55 #include "runtime/fieldDescriptor.hpp"
56 #include "runtime/frame.inline.hpp"
57 #include "runtime/handles.inline.hpp"
58 #include "runtime/icache.hpp"
59 #include "runtime/interfaceSupport.inline.hpp"
60 #include "runtime/java.hpp"
61 #include "runtime/jfieldIDWorkaround.hpp"
62 #include "runtime/osThread.hpp"
63 #include "runtime/sharedRuntime.hpp"
64 #include "runtime/stubRoutines.hpp"
65 #include "runtime/synchronizer.hpp"
66 #include "runtime/threadCritical.hpp"
67 #include "utilities/align.hpp"
68 #include "utilities/copy.hpp"
69 #include "utilities/events.hpp"
70 #ifdef COMPILER2
71 #include "opto/runtime.hpp"
72 #endif
73
74 class UnlockFlagSaver {
75 private:
76 JavaThread* _thread;
77 bool _do_not_unlock;
78 public:
79 UnlockFlagSaver(JavaThread* t) {
80 _thread = t;
81 _do_not_unlock = t->do_not_unlock_if_synchronized();
82 t->set_do_not_unlock_if_synchronized(false);
83 }
84 ~UnlockFlagSaver() {
85 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
86 }
87 };
88
89 // Helper class to access current interpreter state
90 class LastFrameAccessor : public StackObj {
91 frame _last_frame;
92 public:
93 LastFrameAccessor(JavaThread* thread) {
94 assert(thread == Thread::current(), "sanity");
95 _last_frame = thread->last_frame();
96 }
97 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
98 Method* method() const { return _last_frame.interpreter_frame_method(); }
99 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
100 int bci() const { return _last_frame.interpreter_frame_bci(); }
101 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
102
103 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
104 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
105
106 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
107 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
108
109 Bytecode bytecode() const { return Bytecode(method(), bcp()); }
110 int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
111 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
112 int get_index_u2_cpcache(Bytecodes::Code bc) const
113 { return bytecode().get_index_u2_cpcache(bc); }
114 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
115 int number_of_dimensions() const { return bcp()[3]; }
116 ConstantPoolCacheEntry* cache_entry_at(int i) const
117 { return method()->constants()->cache()->entry_at(i); }
118 ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
119
120 oop callee_receiver(Symbol* signature) {
121 return _last_frame.interpreter_callee_receiver(signature);
122 }
123 BasicObjectLock* monitor_begin() const {
124 return _last_frame.interpreter_frame_monitor_begin();
125 }
126 BasicObjectLock* monitor_end() const {
127 return _last_frame.interpreter_frame_monitor_end();
128 }
129 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
130 return _last_frame.next_monitor_in_interpreter_frame(current);
131 }
132
133 frame& get_frame() { return _last_frame; }
134 };
135
136
137 bool InterpreterRuntime::is_breakpoint(JavaThread *thread) {
138 return Bytecodes::code_or_bp_at(LastFrameAccessor(thread).bcp()) == Bytecodes::_breakpoint;
139 }
140
141 //------------------------------------------------------------------------------------------------------------------------
142 // State accessors
143
144 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
145 LastFrameAccessor last_frame(thread);
146 last_frame.set_bcp(bcp);
147 if (ProfileInterpreter) {
148 // ProfileTraps uses MDOs independently of ProfileInterpreter.
149 // That is why we must check both ProfileInterpreter and mdo != NULL.
150 MethodData* mdo = last_frame.method()->method_data();
151 if (mdo != NULL) {
152 NEEDS_CLEANUP;
153 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
154 }
155 }
156 }
157
158 //------------------------------------------------------------------------------------------------------------------------
159 // Constants
160
161
162 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
163 // access constant pool
164 LastFrameAccessor last_frame(thread);
165 ConstantPool* pool = last_frame.method()->constants();
166 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
167 constantTag tag = pool->tag_at(index);
168
169 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
170 Klass* klass = pool->klass_at(index, CHECK);
171 oop java_class = klass->java_mirror();
172 thread->set_vm_result(java_class);
173 IRT_END
174
175 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
176 assert(bytecode == Bytecodes::_ldc ||
177 bytecode == Bytecodes::_ldc_w ||
178 bytecode == Bytecodes::_ldc2_w ||
179 bytecode == Bytecodes::_fast_aldc ||
180 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
181 ResourceMark rm(thread);
182 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
183 bytecode == Bytecodes::_fast_aldc_w);
184 LastFrameAccessor last_frame(thread);
185 methodHandle m (thread, last_frame.method());
186 Bytecode_loadconstant ldc(m, last_frame.bci());
187
188 // Double-check the size. (Condy can have any type.)
189 BasicType type = ldc.result_type();
190 switch (type2size[type]) {
191 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
192 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
193 default: ShouldNotReachHere();
194 }
195
196 // Resolve the constant. This does not do unboxing.
197 // But it does replace Universe::the_null_sentinel by null.
198 oop result = ldc.resolve_constant(CHECK);
199 assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
200
201 #ifdef ASSERT
202 {
203 // The bytecode wrappers aren't GC-safe so construct a new one
204 Bytecode_loadconstant ldc2(m, last_frame.bci());
205 int rindex = ldc2.cache_index();
206 if (rindex < 0)
207 rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
208 if (rindex >= 0) {
209 oop coop = m->constants()->resolved_references()->obj_at(rindex);
210 oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
211 assert(roop == coop, "expected result for assembly code");
212 }
213 }
214 #endif
215 thread->set_vm_result(result);
216 if (!is_fast_aldc) {
217 // Tell the interpreter how to unbox the primitive.
218 guarantee(java_lang_boxing_object::is_instance(result, type), "");
219 int offset = java_lang_boxing_object::value_offset_in_bytes(type);
220 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
221 | (offset & ConstantPoolCacheEntry::field_index_mask));
222 thread->set_vm_result_2((Metadata*)flags);
223 }
224 }
225 IRT_END
226
227
228 //------------------------------------------------------------------------------------------------------------------------
229 // Allocation
230
231 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
232 JvmtiSampledObjectAllocEventCollector collector;
233 Klass* k = pool->klass_at(index, CHECK);
234 InstanceKlass* klass = InstanceKlass::cast(k);
235
236 // Make sure we are not instantiating an abstract klass
237 klass->check_valid_for_instantiation(true, CHECK);
238
239 // Make sure klass is initialized
240 klass->initialize(CHECK);
241
242 // At this point the class may not be fully initialized
243 // because of recursive initialization. If it is fully
244 // initialized & has_finalized is not set, we rewrite
245 // it into its fast version (Note: no locking is needed
246 // here since this is an atomic byte write and can be
247 // done more than once).
248 //
249 // Note: In case of classes with has_finalized we don't
250 // rewrite since that saves us an extra check in
251 // the fast version which then would call the
252 // slow version anyway (and do a call back into
253 // Java).
254 // If we have a breakpoint, then we don't rewrite
255 // because the _breakpoint bytecode would be lost.
256 oop obj = klass->allocate_instance(CHECK);
257 thread->set_vm_result(obj);
258 IRT_END
259
260
261 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
262 JvmtiSampledObjectAllocEventCollector collector;
263 oop obj = oopFactory::new_typeArray(type, size, CHECK);
264 thread->set_vm_result(obj);
265 IRT_END
266
267
268 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
269 JvmtiSampledObjectAllocEventCollector collector;
270 Klass* klass = pool->klass_at(index, CHECK);
271 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
272 thread->set_vm_result(obj);
273 IRT_END
274
275
276 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
277 JvmtiSampledObjectAllocEventCollector collector;
278 // We may want to pass in more arguments - could make this slightly faster
279 LastFrameAccessor last_frame(thread);
280 ConstantPool* constants = last_frame.method()->constants();
281 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
282 Klass* klass = constants->klass_at(i, CHECK);
283 int nof_dims = last_frame.number_of_dimensions();
284 assert(klass->is_klass(), "not a class");
285 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
286
287 // We must create an array of jints to pass to multi_allocate.
288 ResourceMark rm(thread);
289 const int small_dims = 10;
290 jint dim_array[small_dims];
291 jint *dims = &dim_array[0];
292 if (nof_dims > small_dims) {
293 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
294 }
295 for (int index = 0; index < nof_dims; index++) {
296 // offset from first_size_address is addressed as local[index]
297 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
298 dims[index] = first_size_address[n];
299 }
300 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
301 thread->set_vm_result(obj);
302 IRT_END
303
304
305 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
306 assert(oopDesc::is_oop(obj), "must be a valid oop");
307 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
308 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
309 IRT_END
310
311
312 // Quicken instance-of and check-cast bytecodes
313 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
314 // Force resolving; quicken the bytecode
315 LastFrameAccessor last_frame(thread);
316 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
317 ConstantPool* cpool = last_frame.method()->constants();
318 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
319 // program we might have seen an unquick'd bytecode in the interpreter but have another
320 // thread quicken the bytecode before we get here.
321 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
322 Klass* klass = cpool->klass_at(which, CHECK);
323 thread->set_vm_result_2(klass);
324 IRT_END
325
326
327 //------------------------------------------------------------------------------------------------------------------------
328 // Exceptions
329
330 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
331 const methodHandle& trap_method, int trap_bci, TRAPS) {
332 if (trap_method.not_null()) {
333 MethodData* trap_mdo = trap_method->method_data();
334 if (trap_mdo == NULL) {
335 Method::build_interpreter_method_data(trap_method, THREAD);
336 if (HAS_PENDING_EXCEPTION) {
337 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
338 "we expect only an OOM error here");
339 CLEAR_PENDING_EXCEPTION;
340 }
341 trap_mdo = trap_method->method_data();
342 // and fall through...
343 }
344 if (trap_mdo != NULL) {
345 // Update per-method count of trap events. The interpreter
346 // is updating the MDO to simulate the effect of compiler traps.
347 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
348 }
349 }
350 }
351
352 // Assume the compiler is (or will be) interested in this event.
353 // If necessary, create an MDO to hold the information, and record it.
354 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
355 assert(ProfileTraps, "call me only if profiling");
356 LastFrameAccessor last_frame(thread);
357 methodHandle trap_method(thread, last_frame.method());
358 int trap_bci = trap_method->bci_from(last_frame.bcp());
359 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
360 }
361
362 #ifdef CC_INTERP
363 // As legacy note_trap, but we have more arguments.
364 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
365 methodHandle trap_method(method);
366 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
367 IRT_END
368
369 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
370 // for each exception.
371 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
372 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
373 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
374 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
375 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
376 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
377 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
378 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
379 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
380 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
381 #endif // CC_INTERP
382
383
384 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
385 // get klass
386 InstanceKlass* klass = InstanceKlass::cast(k);
387 assert(klass->is_initialized(),
388 "this klass should have been initialized during VM initialization");
389 // create instance - do not call constructor since we may have no
390 // (java) stack space left (should assert constructor is empty)
391 Handle exception;
392 oop exception_oop = klass->allocate_instance(CHECK_(exception));
393 exception = Handle(THREAD, exception_oop);
394 if (StackTraceInThrowable) {
395 java_lang_Throwable::fill_in_stack_trace(exception);
396 }
397 return exception;
398 }
399
400 // Special handling for stack overflow: since we don't have any (java) stack
401 // space left we use the pre-allocated & pre-initialized StackOverflowError
402 // klass to create an stack overflow error instance. We do not call its
403 // constructor for the same reason (it is empty, anyway).
404 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
405 Handle exception = get_preinitialized_exception(
406 SystemDictionary::StackOverflowError_klass(),
407 CHECK);
408 // Increment counter for hs_err file reporting
409 Atomic::inc(&Exceptions::_stack_overflow_errors);
410 THROW_HANDLE(exception);
411 IRT_END
412
413 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
414 Handle exception = get_preinitialized_exception(
415 SystemDictionary::StackOverflowError_klass(),
416 CHECK);
417 java_lang_Throwable::set_message(exception(),
418 Universe::delayed_stack_overflow_error_message());
419 // Increment counter for hs_err file reporting
420 Atomic::inc(&Exceptions::_stack_overflow_errors);
421 THROW_HANDLE(exception);
422 IRT_END
423
424 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
425 // lookup exception klass
426 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
427 if (ProfileTraps) {
428 if (s == vmSymbols::java_lang_ArithmeticException()) {
429 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
430 } else if (s == vmSymbols::java_lang_NullPointerException()) {
431 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
432 }
433 }
434 // create exception
435 Handle exception = Exceptions::new_exception(thread, s, message);
436 thread->set_vm_result(exception());
437 IRT_END
438
439
440 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
441 ResourceMark rm(thread);
442 const char* klass_name = obj->klass()->external_name();
443 // lookup exception klass
444 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
445 if (ProfileTraps) {
446 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
447 }
448 // create exception, with klass name as detail message
449 Handle exception = Exceptions::new_exception(thread, s, klass_name);
450 thread->set_vm_result(exception());
451 IRT_END
452
453
454 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
455 char message[jintAsStringSize];
456 // lookup exception klass
457 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
458 if (ProfileTraps) {
459 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
460 }
461 // create exception
462 sprintf(message, "%d", index);
463 THROW_MSG(s, message);
464 IRT_END
465
466 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
467 JavaThread* thread, oopDesc* obj))
468
469 ResourceMark rm(thread);
470 char* message = SharedRuntime::generate_class_cast_message(
471 thread, obj->klass());
472
473 if (ProfileTraps) {
474 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
475 }
476
477 // create exception
478 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
479 IRT_END
480
481 // exception_handler_for_exception(...) returns the continuation address,
482 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
483 // The exception oop is returned to make sure it is preserved over GC (it
484 // is only on the stack if the exception was thrown explicitly via athrow).
485 // During this operation, the expression stack contains the values for the
486 // bci where the exception happened. If the exception was propagated back
487 // from a call, the expression stack contains the values for the bci at the
488 // invoke w/o arguments (i.e., as if one were inside the call).
489 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
490
491 LastFrameAccessor last_frame(thread);
492 Handle h_exception(thread, exception);
493 methodHandle h_method (thread, last_frame.method());
494 constantPoolHandle h_constants(thread, h_method->constants());
495 bool should_repeat;
496 int handler_bci;
497 int current_bci = last_frame.bci();
498
499 if (thread->frames_to_pop_failed_realloc() > 0) {
500 // Allocation of scalar replaced object used in this frame
501 // failed. Unconditionally pop the frame.
502 thread->dec_frames_to_pop_failed_realloc();
503 thread->set_vm_result(h_exception());
504 // If the method is synchronized we already unlocked the monitor
505 // during deoptimization so the interpreter needs to skip it when
506 // the frame is popped.
507 thread->set_do_not_unlock_if_synchronized(true);
508 #ifdef CC_INTERP
509 return (address) -1;
510 #else
511 return Interpreter::remove_activation_entry();
512 #endif
513 }
514
515 // Need to do this check first since when _do_not_unlock_if_synchronized
516 // is set, we don't want to trigger any classloading which may make calls
517 // into java, or surprisingly find a matching exception handler for bci 0
518 // since at this moment the method hasn't been "officially" entered yet.
519 if (thread->do_not_unlock_if_synchronized()) {
520 ResourceMark rm;
521 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
522 thread->set_vm_result(exception);
523 #ifdef CC_INTERP
524 return (address) -1;
525 #else
526 return Interpreter::remove_activation_entry();
527 #endif
528 }
529
530 do {
531 should_repeat = false;
532
533 // assertions
534 #ifdef ASSERT
535 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
536 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
537 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
538 if (ExitVMOnVerifyError) vm_exit(-1);
539 ShouldNotReachHere();
540 }
541 #endif
542
543 // tracing
544 if (log_is_enabled(Info, exceptions)) {
545 ResourceMark rm(thread);
546 stringStream tempst;
547 tempst.print("interpreter method <%s>\n"
548 " at bci %d for thread " INTPTR_FORMAT " (%s)",
549 h_method->print_value_string(), current_bci, p2i(thread), thread->name());
550 Exceptions::log_exception(h_exception, tempst);
551 }
552 // Don't go paging in something which won't be used.
553 // else if (extable->length() == 0) {
554 // // disabled for now - interpreter is not using shortcut yet
555 // // (shortcut is not to call runtime if we have no exception handlers)
556 // // warning("performance bug: should not call runtime if method has no exception handlers");
557 // }
558 // for AbortVMOnException flag
559 Exceptions::debug_check_abort(h_exception);
560
561 // exception handler lookup
562 Klass* klass = h_exception->klass();
563 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
564 if (HAS_PENDING_EXCEPTION) {
565 // We threw an exception while trying to find the exception handler.
566 // Transfer the new exception to the exception handle which will
567 // be set into thread local storage, and do another lookup for an
568 // exception handler for this exception, this time starting at the
569 // BCI of the exception handler which caused the exception to be
570 // thrown (bug 4307310).
571 h_exception = Handle(THREAD, PENDING_EXCEPTION);
572 CLEAR_PENDING_EXCEPTION;
573 if (handler_bci >= 0) {
574 current_bci = handler_bci;
575 should_repeat = true;
576 }
577 }
578 } while (should_repeat == true);
579
580 #if INCLUDE_JVMCI
581 if (EnableJVMCI && h_method->method_data() != NULL) {
582 ResourceMark rm(thread);
583 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
584 if (pdata != NULL && pdata->is_BitData()) {
585 BitData* bit_data = (BitData*) pdata;
586 bit_data->set_exception_seen();
587 }
588 }
589 #endif
590
591 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
592 // time throw or a stack unwinding throw and accordingly notify the debugger
593 if (JvmtiExport::can_post_on_exceptions()) {
594 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
595 }
596
597 #ifdef CC_INTERP
598 address continuation = (address)(intptr_t) handler_bci;
599 #else
600 address continuation = NULL;
601 #endif
602 address handler_pc = NULL;
603 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
604 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
605 // handler in this method, or (b) after a stack overflow there is not yet
606 // enough stack space available to reprotect the stack.
607 #ifndef CC_INTERP
608 continuation = Interpreter::remove_activation_entry();
609 #endif
610 #if COMPILER2_OR_JVMCI
611 // Count this for compilation purposes
612 h_method->interpreter_throwout_increment(THREAD);
613 #endif
614 } else {
615 // handler in this method => change bci/bcp to handler bci/bcp and continue there
616 handler_pc = h_method->code_base() + handler_bci;
617 #ifndef CC_INTERP
618 set_bcp_and_mdp(handler_pc, thread);
619 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
620 #endif
621 }
622 // notify debugger of an exception catch
623 // (this is good for exceptions caught in native methods as well)
624 if (JvmtiExport::can_post_on_exceptions()) {
625 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
626 }
627
628 thread->set_vm_result(h_exception());
629 return continuation;
630 IRT_END
631
632
633 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
634 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
635 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
636 IRT_END
637
638
639 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
640 THROW(vmSymbols::java_lang_AbstractMethodError());
641 IRT_END
642
643 // This method is called from the "abstract_entry" of the interpreter.
644 // At that point, the arguments have already been removed from the stack
645 // and therefore we don't have the receiver object at our fingertips. (Though,
646 // on some platforms the receiver still resides in a register...). Thus,
647 // we have no choice but print an error message not containing the receiver
648 // type.
649 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* thread,
650 Method* missingMethod))
651 ResourceMark rm(thread);
652 assert(missingMethod != NULL, "sanity");
653 methodHandle m(thread, missingMethod);
654 LinkResolver::throw_abstract_method_error(m, THREAD);
655 IRT_END
656
657 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* thread,
658 Klass* recvKlass,
659 Method* missingMethod))
660 ResourceMark rm(thread);
661 methodHandle mh = methodHandle(thread, missingMethod);
662 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
663 IRT_END
664
665
666 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
667 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
668 IRT_END
669
670 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* thread,
671 Klass* recvKlass,
672 Klass* interfaceKlass))
673 ResourceMark rm(thread);
674 char buf[1000];
675 buf[0] = '\0';
676 jio_snprintf(buf, sizeof(buf),
677 "Class %s does not implement the requested interface %s",
678 recvKlass ? recvKlass->external_name() : "NULL",
679 interfaceKlass ? interfaceKlass->external_name() : "NULL");
680 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
681 IRT_END
682
683 //------------------------------------------------------------------------------------------------------------------------
684 // Fields
685 //
686
687 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
688 Thread* THREAD = thread;
689 // resolve field
690 fieldDescriptor info;
691 LastFrameAccessor last_frame(thread);
692 constantPoolHandle pool(thread, last_frame.method()->constants());
693 methodHandle m(thread, last_frame.method());
694 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
695 bytecode == Bytecodes::_putstatic);
696 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
697
698 {
699 JvmtiHideSingleStepping jhss(thread);
700 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
701 m, bytecode, CHECK);
702 } // end JvmtiHideSingleStepping
703
704 // check if link resolution caused cpCache to be updated
705 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
706 if (cp_cache_entry->is_resolved(bytecode)) return;
707
708 // compute auxiliary field attributes
709 TosState state = as_TosState(info.field_type());
710
711 // Resolution of put instructions on final fields is delayed. That is required so that
712 // exceptions are thrown at the correct place (when the instruction is actually invoked).
713 // If we do not resolve an instruction in the current pass, leaving the put_code
714 // set to zero will cause the next put instruction to the same field to reresolve.
715
716 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
717 // to final instance fields with updates originating from a method different than <init>)
718 // is inhibited. A putfield instruction targeting an instance final field must throw
719 // an IllegalAccessError if the instruction is not in an instance
720 // initializer method <init>. If resolution were not inhibited, a putfield
721 // in an initializer method could be resolved in the initializer. Subsequent
722 // putfield instructions to the same field would then use cached information.
723 // As a result, those instructions would not pass through the VM. That is,
724 // checks in resolve_field_access() would not be executed for those instructions
725 // and the required IllegalAccessError would not be thrown.
726 //
727 // Also, we need to delay resolving getstatic and putstatic instructions until the
728 // class is initialized. This is required so that access to the static
729 // field will call the initialization function every time until the class
730 // is completely initialized ala. in 2.17.5 in JVM Specification.
731 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
732 bool uninitialized_static = is_static && !klass->is_initialized();
733 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
734 info.has_initialized_final_update();
735 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
736
737 Bytecodes::Code get_code = (Bytecodes::Code)0;
738 Bytecodes::Code put_code = (Bytecodes::Code)0;
739 if (!uninitialized_static) {
740 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
741 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
742 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
743 }
744 }
745
746 cp_cache_entry->set_field(
747 get_code,
748 put_code,
749 info.field_holder(),
750 info.index(),
751 info.offset(),
752 state,
753 info.access_flags().is_final(),
754 info.access_flags().is_volatile(),
755 pool->pool_holder()
756 );
757 }
758
759
760 //------------------------------------------------------------------------------------------------------------------------
761 // Synchronization
762 //
763 // The interpreter's synchronization code is factored out so that it can
764 // be shared by method invocation and synchronized blocks.
765 //%note synchronization_3
766
767 //%note monitor_1
768 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
769 #ifdef ASSERT
770 thread->last_frame().interpreter_frame_verify_monitor(elem);
771 #endif
772 if (PrintBiasedLockingStatistics) {
773 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
774 }
775 Handle h_obj(thread, elem->obj());
776 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
777 "must be NULL or an object");
778 if (UseBiasedLocking) {
779 // Retry fast entry if bias is revoked to avoid unnecessary inflation
780 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
781 } else {
782 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
783 }
784 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
785 "must be NULL or an object");
786 #ifdef ASSERT
787 thread->last_frame().interpreter_frame_verify_monitor(elem);
788 #endif
789 IRT_END
790
791
792 //%note monitor_1
793 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
794 #ifdef ASSERT
795 thread->last_frame().interpreter_frame_verify_monitor(elem);
796 #endif
797 Handle h_obj(thread, elem->obj());
798 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
799 "must be NULL or an object");
800 if (elem == NULL || h_obj()->is_unlocked()) {
801 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
802 }
803 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
804 // Free entry. This must be done here, since a pending exception might be installed on
805 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
806 elem->set_obj(NULL);
807 #ifdef ASSERT
808 thread->last_frame().interpreter_frame_verify_monitor(elem);
809 #endif
810 IRT_END
811
812
813 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
814 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
815 IRT_END
816
817
818 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
819 // Returns an illegal exception to install into the current thread. The
820 // pending_exception flag is cleared so normal exception handling does not
821 // trigger. Any current installed exception will be overwritten. This
822 // method will be called during an exception unwind.
823
824 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
825 Handle exception(thread, thread->vm_result());
826 assert(exception() != NULL, "vm result should be set");
827 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
828 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
829 exception = get_preinitialized_exception(
830 SystemDictionary::IllegalMonitorStateException_klass(),
831 CATCH);
832 }
833 thread->set_vm_result(exception());
834 IRT_END
835
836
837 //------------------------------------------------------------------------------------------------------------------------
838 // Invokes
839
840 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
841 return method->orig_bytecode_at(method->bci_from(bcp));
842 IRT_END
843
844 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
845 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
846 IRT_END
847
848 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
849 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
850 IRT_END
851
852 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
853 Thread* THREAD = thread;
854 LastFrameAccessor last_frame(thread);
855 // extract receiver from the outgoing argument list if necessary
856 Handle receiver(thread, NULL);
857 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
858 bytecode == Bytecodes::_invokespecial) {
859 ResourceMark rm(thread);
860 methodHandle m (thread, last_frame.method());
861 Bytecode_invoke call(m, last_frame.bci());
862 Symbol* signature = call.signature();
863 receiver = Handle(thread, last_frame.callee_receiver(signature));
864
865 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
866 "sanity check");
867 assert(receiver.is_null() ||
868 !Universe::heap()->is_in_reserved(receiver->klass()),
869 "sanity check");
870 }
871
872 // resolve method
873 CallInfo info;
874 constantPoolHandle pool(thread, last_frame.method()->constants());
875
876 {
877 JvmtiHideSingleStepping jhss(thread);
878 LinkResolver::resolve_invoke(info, receiver, pool,
879 last_frame.get_index_u2_cpcache(bytecode), bytecode,
880 CHECK);
881 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
882 int retry_count = 0;
883 while (info.resolved_method()->is_old()) {
884 // It is very unlikely that method is redefined more than 100 times
885 // in the middle of resolve. If it is looping here more than 100 times
886 // means then there could be a bug here.
887 guarantee((retry_count++ < 100),
888 "Could not resolve to latest version of redefined method");
889 // method is redefined in the middle of resolve so re-try.
890 LinkResolver::resolve_invoke(info, receiver, pool,
891 last_frame.get_index_u2_cpcache(bytecode), bytecode,
892 CHECK);
893 }
894 }
895 } // end JvmtiHideSingleStepping
896
897 // check if link resolution caused cpCache to be updated
898 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
899 if (cp_cache_entry->is_resolved(bytecode)) return;
900
901 #ifdef ASSERT
902 if (bytecode == Bytecodes::_invokeinterface) {
903 if (info.resolved_method()->method_holder() ==
904 SystemDictionary::Object_klass()) {
905 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
906 // (see also CallInfo::set_interface for details)
907 assert(info.call_kind() == CallInfo::vtable_call ||
908 info.call_kind() == CallInfo::direct_call, "");
909 methodHandle rm = info.resolved_method();
910 assert(rm->is_final() || info.has_vtable_index(),
911 "should have been set already");
912 } else if (!info.resolved_method()->has_itable_index()) {
913 // Resolved something like CharSequence.toString. Use vtable not itable.
914 assert(info.call_kind() != CallInfo::itable_call, "");
915 } else {
916 // Setup itable entry
917 assert(info.call_kind() == CallInfo::itable_call, "");
918 int index = info.resolved_method()->itable_index();
919 assert(info.itable_index() == index, "");
920 }
921 } else if (bytecode == Bytecodes::_invokespecial) {
922 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
923 } else {
924 assert(info.call_kind() == CallInfo::direct_call ||
925 info.call_kind() == CallInfo::vtable_call, "");
926 }
927 #endif
928 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
929 // it is not an interface. The receiver for invokespecial calls within interface
930 // methods must be checked for every call.
931 InstanceKlass* sender = pool->pool_holder();
932 sender = sender->has_host_klass() ? sender->host_klass() : sender;
933
934 switch (info.call_kind()) {
935 case CallInfo::direct_call:
936 cp_cache_entry->set_direct_call(
937 bytecode,
938 info.resolved_method(),
939 sender->is_interface());
940 break;
941 case CallInfo::vtable_call:
942 cp_cache_entry->set_vtable_call(
943 bytecode,
944 info.resolved_method(),
945 info.vtable_index());
946 break;
947 case CallInfo::itable_call:
948 cp_cache_entry->set_itable_call(
949 bytecode,
950 info.resolved_klass(),
951 info.resolved_method(),
952 info.itable_index());
953 break;
954 default: ShouldNotReachHere();
955 }
956 }
957
958
959 // First time execution: Resolve symbols, create a permanent MethodType object.
960 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
961 Thread* THREAD = thread;
962 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
963 LastFrameAccessor last_frame(thread);
964
965 // resolve method
966 CallInfo info;
967 constantPoolHandle pool(thread, last_frame.method()->constants());
968 {
969 JvmtiHideSingleStepping jhss(thread);
970 LinkResolver::resolve_invoke(info, Handle(), pool,
971 last_frame.get_index_u2_cpcache(bytecode), bytecode,
972 CHECK);
973 } // end JvmtiHideSingleStepping
974
975 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
976 cp_cache_entry->set_method_handle(pool, info);
977 }
978
979 // First time execution: Resolve symbols, create a permanent CallSite object.
980 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
981 Thread* THREAD = thread;
982 LastFrameAccessor last_frame(thread);
983 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
984
985 //TO DO: consider passing BCI to Java.
986 // int caller_bci = last_frame.method()->bci_from(last_frame.bcp());
987
988 // resolve method
989 CallInfo info;
990 constantPoolHandle pool(thread, last_frame.method()->constants());
991 int index = last_frame.get_index_u4(bytecode);
992 {
993 JvmtiHideSingleStepping jhss(thread);
994 LinkResolver::resolve_invoke(info, Handle(), pool,
995 index, bytecode, CHECK);
996 } // end JvmtiHideSingleStepping
997
998 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
999 cp_cache_entry->set_dynamic_call(pool, info);
1000 }
1001
1002 // This function is the interface to the assembly code. It returns the resolved
1003 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1004 // This function will check for redefinition!
1005 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1006 switch (bytecode) {
1007 case Bytecodes::_getstatic:
1008 case Bytecodes::_putstatic:
1009 case Bytecodes::_getfield:
1010 case Bytecodes::_putfield:
1011 resolve_get_put(thread, bytecode);
1012 break;
1013 case Bytecodes::_invokevirtual:
1014 case Bytecodes::_invokespecial:
1015 case Bytecodes::_invokestatic:
1016 case Bytecodes::_invokeinterface:
1017 resolve_invoke(thread, bytecode);
1018 break;
1019 case Bytecodes::_invokehandle:
1020 resolve_invokehandle(thread);
1021 break;
1022 case Bytecodes::_invokedynamic:
1023 resolve_invokedynamic(thread);
1024 break;
1025 default:
1026 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1027 break;
1028 }
1029 }
1030 IRT_END
1031
1032 //------------------------------------------------------------------------------------------------------------------------
1033 // Miscellaneous
1034
1035
1036 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1037 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1038 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1039 if (branch_bcp != NULL && nm != NULL) {
1040 // This was a successful request for an OSR nmethod. Because
1041 // frequency_counter_overflow_inner ends with a safepoint check,
1042 // nm could have been unloaded so look it up again. It's unsafe
1043 // to examine nm directly since it might have been freed and used
1044 // for something else.
1045 LastFrameAccessor last_frame(thread);
1046 Method* method = last_frame.method();
1047 int bci = method->bci_from(last_frame.bcp());
1048 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1049 }
1050 if (nm != NULL && thread->is_interp_only_mode()) {
1051 // Normally we never get an nm if is_interp_only_mode() is true, because
1052 // policy()->event has a check for this and won't compile the method when
1053 // true. However, it's possible for is_interp_only_mode() to become true
1054 // during the compilation. We don't want to return the nm in that case
1055 // because we want to continue to execute interpreted.
1056 nm = NULL;
1057 }
1058 #ifndef PRODUCT
1059 if (TraceOnStackReplacement) {
1060 if (nm != NULL) {
1061 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1062 nm->print();
1063 }
1064 }
1065 #endif
1066 return nm;
1067 }
1068
1069 IRT_ENTRY(nmethod*,
1070 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1071 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1072 // flag, in case this method triggers classloading which will call into Java.
1073 UnlockFlagSaver fs(thread);
1074
1075 LastFrameAccessor last_frame(thread);
1076 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1077 methodHandle method(thread, last_frame.method());
1078 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1079 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1080
1081 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1082 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1083 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1084
1085 if (osr_nm != NULL) {
1086 // We may need to do on-stack replacement which requires that no
1087 // monitors in the activation are biased because their
1088 // BasicObjectLocks will need to migrate during OSR. Force
1089 // unbiasing of all monitors in the activation now (even though
1090 // the OSR nmethod might be invalidated) because we don't have a
1091 // safepoint opportunity later once the migration begins.
1092 if (UseBiasedLocking) {
1093 ResourceMark rm;
1094 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1095 for( BasicObjectLock *kptr = last_frame.monitor_end();
1096 kptr < last_frame.monitor_begin();
1097 kptr = last_frame.next_monitor(kptr) ) {
1098 if( kptr->obj() != NULL ) {
1099 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1100 }
1101 }
1102 BiasedLocking::revoke(objects_to_revoke);
1103 }
1104 }
1105 return osr_nm;
1106 IRT_END
1107
1108 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1109 assert(ProfileInterpreter, "must be profiling interpreter");
1110 int bci = method->bci_from(cur_bcp);
1111 MethodData* mdo = method->method_data();
1112 if (mdo == NULL) return 0;
1113 return mdo->bci_to_di(bci);
1114 IRT_END
1115
1116 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1117 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1118 // flag, in case this method triggers classloading which will call into Java.
1119 UnlockFlagSaver fs(thread);
1120
1121 assert(ProfileInterpreter, "must be profiling interpreter");
1122 LastFrameAccessor last_frame(thread);
1123 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1124 methodHandle method(thread, last_frame.method());
1125 Method::build_interpreter_method_data(method, THREAD);
1126 if (HAS_PENDING_EXCEPTION) {
1127 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1128 CLEAR_PENDING_EXCEPTION;
1129 // and fall through...
1130 }
1131 IRT_END
1132
1133
1134 #ifdef ASSERT
1135 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1136 assert(ProfileInterpreter, "must be profiling interpreter");
1137
1138 MethodData* mdo = method->method_data();
1139 assert(mdo != NULL, "must not be null");
1140
1141 int bci = method->bci_from(bcp);
1142
1143 address mdp2 = mdo->bci_to_dp(bci);
1144 if (mdp != mdp2) {
1145 ResourceMark rm;
1146 ResetNoHandleMark rnm; // In a LEAF entry.
1147 HandleMark hm;
1148 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1149 int current_di = mdo->dp_to_di(mdp);
1150 int expected_di = mdo->dp_to_di(mdp2);
1151 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1152 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1153 int approx_bci = -1;
1154 if (current_di >= 0) {
1155 approx_bci = mdo->data_at(current_di)->bci();
1156 }
1157 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1158 mdo->print_on(tty);
1159 method->print_codes();
1160 }
1161 assert(mdp == mdp2, "wrong mdp");
1162 IRT_END
1163 #endif // ASSERT
1164
1165 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1166 assert(ProfileInterpreter, "must be profiling interpreter");
1167 ResourceMark rm(thread);
1168 HandleMark hm(thread);
1169 LastFrameAccessor last_frame(thread);
1170 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1171 MethodData* h_mdo = last_frame.method()->method_data();
1172
1173 // Grab a lock to ensure atomic access to setting the return bci and
1174 // the displacement. This can block and GC, invalidating all naked oops.
1175 MutexLocker ml(RetData_lock);
1176
1177 // ProfileData is essentially a wrapper around a derived oop, so we
1178 // need to take the lock before making any ProfileData structures.
1179 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1180 guarantee(data != NULL, "profile data must be valid");
1181 RetData* rdata = data->as_RetData();
1182 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1183 last_frame.set_mdp(new_mdp);
1184 IRT_END
1185
1186 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1187 MethodCounters* mcs = Method::build_method_counters(m, thread);
1188 if (HAS_PENDING_EXCEPTION) {
1189 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1190 CLEAR_PENDING_EXCEPTION;
1191 }
1192 return mcs;
1193 IRT_END
1194
1195
1196 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1197 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1198 // stack traversal automatically takes care of preserving arguments for invoke, so
1199 // this is no longer needed.
1200
1201 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1202 // if this is called during a safepoint
1203
1204 if (JvmtiExport::should_post_single_step()) {
1205 // We are called during regular safepoints and when the VM is
1206 // single stepping. If any thread is marked for single stepping,
1207 // then we may have JVMTI work to do.
1208 LastFrameAccessor last_frame(thread);
1209 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1210 }
1211 IRT_END
1212
1213 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1214 ConstantPoolCacheEntry *cp_entry))
1215
1216 // check the access_flags for the field in the klass
1217
1218 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1219 int index = cp_entry->field_index();
1220 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1221
1222 bool is_static = (obj == NULL);
1223 HandleMark hm(thread);
1224
1225 Handle h_obj;
1226 if (!is_static) {
1227 // non-static field accessors have an object, but we need a handle
1228 h_obj = Handle(thread, obj);
1229 }
1230 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1231 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1232 LastFrameAccessor last_frame(thread);
1233 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1234 IRT_END
1235
1236 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1237 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1238
1239 Klass* k = cp_entry->f1_as_klass();
1240
1241 // check the access_flags for the field in the klass
1242 InstanceKlass* ik = InstanceKlass::cast(k);
1243 int index = cp_entry->field_index();
1244 // bail out if field modifications are not watched
1245 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1246
1247 char sig_type = '\0';
1248
1249 switch(cp_entry->flag_state()) {
1250 case btos: sig_type = 'B'; break;
1251 case ztos: sig_type = 'Z'; break;
1252 case ctos: sig_type = 'C'; break;
1253 case stos: sig_type = 'S'; break;
1254 case itos: sig_type = 'I'; break;
1255 case ftos: sig_type = 'F'; break;
1256 case atos: sig_type = 'L'; break;
1257 case ltos: sig_type = 'J'; break;
1258 case dtos: sig_type = 'D'; break;
1259 default: ShouldNotReachHere(); return;
1260 }
1261 bool is_static = (obj == NULL);
1262
1263 HandleMark hm(thread);
1264 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1265 jvalue fvalue;
1266 #ifdef _LP64
1267 fvalue = *value;
1268 #else
1269 // Long/double values are stored unaligned and also noncontiguously with
1270 // tagged stacks. We can't just do a simple assignment even in the non-
1271 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1272 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1273 // We assume that the two halves of longs/doubles are stored in interpreter
1274 // stack slots in platform-endian order.
1275 jlong_accessor u;
1276 jint* newval = (jint*)value;
1277 u.words[0] = newval[0];
1278 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1279 fvalue.j = u.long_value;
1280 #endif // _LP64
1281
1282 Handle h_obj;
1283 if (!is_static) {
1284 // non-static field accessors have an object, but we need a handle
1285 h_obj = Handle(thread, obj);
1286 }
1287
1288 LastFrameAccessor last_frame(thread);
1289 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1290 fid, sig_type, &fvalue);
1291 IRT_END
1292
1293 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1294 LastFrameAccessor last_frame(thread);
1295 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1296 IRT_END
1297
1298
1299 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1300 LastFrameAccessor last_frame(thread);
1301 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1302 IRT_END
1303
1304 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1305 {
1306 return (Interpreter::contains(pc) ? 1 : 0);
1307 }
1308 IRT_END
1309
1310
1311 // Implementation of SignatureHandlerLibrary
1312
1313 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1314 // Dummy definition (else normalization method is defined in CPU
1315 // dependant code)
1316 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1317 return fingerprint;
1318 }
1319 #endif
1320
1321 address SignatureHandlerLibrary::set_handler_blob() {
1322 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1323 if (handler_blob == NULL) {
1324 return NULL;
1325 }
1326 address handler = handler_blob->code_begin();
1327 _handler_blob = handler_blob;
1328 _handler = handler;
1329 return handler;
1330 }
1331
1332 void SignatureHandlerLibrary::initialize() {
1333 if (_fingerprints != NULL) {
1334 return;
1335 }
1336 if (set_handler_blob() == NULL) {
1337 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1338 }
1339
1340 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1341 SignatureHandlerLibrary::buffer_size);
1342 _buffer = bb->code_begin();
1343
1344 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1345 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1346 }
1347
1348 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1349 address handler = _handler;
1350 int insts_size = buffer->pure_insts_size();
1351 if (handler + insts_size > _handler_blob->code_end()) {
1352 // get a new handler blob
1353 handler = set_handler_blob();
1354 }
1355 if (handler != NULL) {
1356 memcpy(handler, buffer->insts_begin(), insts_size);
1357 pd_set_handler(handler);
1358 ICache::invalidate_range(handler, insts_size);
1359 _handler = handler + insts_size;
1360 }
1361 return handler;
1362 }
1363
1364 void SignatureHandlerLibrary::add(const methodHandle& method) {
1365 if (method->signature_handler() == NULL) {
1366 // use slow signature handler if we can't do better
1367 int handler_index = -1;
1368 // check if we can use customized (fast) signature handler
1369 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1370 // use customized signature handler
1371 MutexLocker mu(SignatureHandlerLibrary_lock);
1372 // make sure data structure is initialized
1373 initialize();
1374 // lookup method signature's fingerprint
1375 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1376 // allow CPU dependant code to optimize the fingerprints for the fast handler
1377 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1378 handler_index = _fingerprints->find(fingerprint);
1379 // create handler if necessary
1380 if (handler_index < 0) {
1381 ResourceMark rm;
1382 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1383 CodeBuffer buffer((address)(_buffer + align_offset),
1384 SignatureHandlerLibrary::buffer_size - align_offset);
1385 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1386 // copy into code heap
1387 address handler = set_handler(&buffer);
1388 if (handler == NULL) {
1389 // use slow signature handler (without memorizing it in the fingerprints)
1390 } else {
1391 // debugging suppport
1392 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1393 ttyLocker ttyl;
1394 tty->cr();
1395 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1396 _handlers->length(),
1397 (method->is_static() ? "static" : "receiver"),
1398 method->name_and_sig_as_C_string(),
1399 fingerprint,
1400 buffer.insts_size());
1401 if (buffer.insts_size() > 0) {
1402 Disassembler::decode(handler, handler + buffer.insts_size());
1403 }
1404 #ifndef PRODUCT
1405 address rh_begin = Interpreter::result_handler(method()->result_type());
1406 if (CodeCache::contains(rh_begin)) {
1407 // else it might be special platform dependent values
1408 tty->print_cr(" --- associated result handler ---");
1409 address rh_end = rh_begin;
1410 while (*(int*)rh_end != 0) {
1411 rh_end += sizeof(int);
1412 }
1413 Disassembler::decode(rh_begin, rh_end);
1414 } else {
1415 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1416 }
1417 #endif
1418 }
1419 // add handler to library
1420 _fingerprints->append(fingerprint);
1421 _handlers->append(handler);
1422 // set handler index
1423 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1424 handler_index = _fingerprints->length() - 1;
1425 }
1426 }
1427 // Set handler under SignatureHandlerLibrary_lock
1428 if (handler_index < 0) {
1429 // use generic signature handler
1430 method->set_signature_handler(Interpreter::slow_signature_handler());
1431 } else {
1432 // set handler
1433 method->set_signature_handler(_handlers->at(handler_index));
1434 }
1435 } else {
1436 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1437 // use generic signature handler
1438 method->set_signature_handler(Interpreter::slow_signature_handler());
1439 }
1440 }
1441 #ifdef ASSERT
1442 int handler_index = -1;
1443 int fingerprint_index = -2;
1444 {
1445 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1446 // in any way if accessed from multiple threads. To avoid races with another
1447 // thread which may change the arrays in the above, mutex protected block, we
1448 // have to protect this read access here with the same mutex as well!
1449 MutexLocker mu(SignatureHandlerLibrary_lock);
1450 if (_handlers != NULL) {
1451 handler_index = _handlers->find(method->signature_handler());
1452 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1453 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1454 fingerprint_index = _fingerprints->find(fingerprint);
1455 }
1456 }
1457 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1458 handler_index == fingerprint_index, "sanity check");
1459 #endif // ASSERT
1460 }
1461
1462 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1463 int handler_index = -1;
1464 // use customized signature handler
1465 MutexLocker mu(SignatureHandlerLibrary_lock);
1466 // make sure data structure is initialized
1467 initialize();
1468 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1469 handler_index = _fingerprints->find(fingerprint);
1470 // create handler if necessary
1471 if (handler_index < 0) {
1472 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1473 tty->cr();
1474 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1475 _handlers->length(),
1476 p2i(handler),
1477 fingerprint);
1478 }
1479 _fingerprints->append(fingerprint);
1480 _handlers->append(handler);
1481 } else {
1482 if (PrintSignatureHandlers) {
1483 tty->cr();
1484 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1485 _handlers->length(),
1486 fingerprint,
1487 p2i(_handlers->at(handler_index)),
1488 p2i(handler));
1489 }
1490 }
1491 }
1492
1493
1494 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1495 address SignatureHandlerLibrary::_handler = NULL;
1496 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1497 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1498 address SignatureHandlerLibrary::_buffer = NULL;
1499
1500
1501 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1502 methodHandle m(thread, method);
1503 assert(m->is_native(), "sanity check");
1504 // lookup native function entry point if it doesn't exist
1505 bool in_base_library;
1506 if (!m->has_native_function()) {
1507 NativeLookup::lookup(m, in_base_library, CHECK);
1508 }
1509 // make sure signature handler is installed
1510 SignatureHandlerLibrary::add(m);
1511 // The interpreter entry point checks the signature handler first,
1512 // before trying to fetch the native entry point and klass mirror.
1513 // We must set the signature handler last, so that multiple processors
1514 // preparing the same method will be sure to see non-null entry & mirror.
1515 IRT_END
1516
1517 #if defined(IA32) || defined(AMD64) || defined(ARM)
1518 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1519 if (src_address == dest_address) {
1520 return;
1521 }
1522 ResetNoHandleMark rnm; // In a LEAF entry.
1523 HandleMark hm;
1524 ResourceMark rm;
1525 LastFrameAccessor last_frame(thread);
1526 assert(last_frame.is_interpreted_frame(), "");
1527 jint bci = last_frame.bci();
1528 methodHandle mh(thread, last_frame.method());
1529 Bytecode_invoke invoke(mh, bci);
1530 ArgumentSizeComputer asc(invoke.signature());
1531 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1532 Copy::conjoint_jbytes(src_address, dest_address,
1533 size_of_arguments * Interpreter::stackElementSize);
1534 IRT_END
1535 #endif
1536
1537 #if INCLUDE_JVMTI
1538 // This is a support of the JVMTI PopFrame interface.
1539 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1540 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1541 // The member_name argument is a saved reference (in local#0) to the member_name.
1542 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1543 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1544 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1545 Method* method, address bcp))
1546 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1547 if (code != Bytecodes::_invokestatic) {
1548 return;
1549 }
1550 ConstantPool* cpool = method->constants();
1551 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1552 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1553 Symbol* mname = cpool->name_ref_at(cp_index);
1554
1555 if (MethodHandles::has_member_arg(cname, mname)) {
1556 oop member_name_oop = (oop) member_name;
1557 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1558 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1559 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1560 }
1561 thread->set_vm_result(member_name_oop);
1562 } else {
1563 thread->set_vm_result(NULL);
1564 }
1565 IRT_END
1566 #endif // INCLUDE_JVMTI
1567
1568 #ifndef PRODUCT
1569 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1570 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1571 // The generated code still uses call_VM because that will set up the frame pointer for
1572 // bcp and method.
1573 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1574 LastFrameAccessor last_frame(thread);
1575 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1576 methodHandle mh(thread, last_frame.method());
1577 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1578 return preserve_this_value;
1579 IRT_END
1580 #endif // !PRODUCT