1 /*
2 * Copyright (c) 1997, 2017, 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.inline.hpp"
41 #include "oops/constantPool.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/methodData.hpp"
44 #include "oops/objArrayKlass.hpp"
45 #include "oops/objArrayOop.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "oops/symbol.hpp"
48 #include "prims/jvmtiExport.hpp"
49 #include "prims/nativeLookup.hpp"
50 #include "runtime/atomic.hpp"
51 #include "runtime/biasedLocking.hpp"
52 #include "runtime/compilationPolicy.hpp"
53 #include "runtime/deoptimization.hpp"
54 #include "runtime/fieldDescriptor.hpp"
55 #include "runtime/handles.inline.hpp"
56 #include "runtime/icache.hpp"
57 #include "runtime/interfaceSupport.hpp"
58 #include "runtime/java.hpp"
59 #include "runtime/jfieldIDWorkaround.hpp"
60 #include "runtime/osThread.hpp"
61 #include "runtime/sharedRuntime.hpp"
62 #include "runtime/stubRoutines.hpp"
63 #include "runtime/synchronizer.hpp"
64 #include "runtime/threadCritical.hpp"
65 #include "utilities/align.hpp"
66 #include "utilities/events.hpp"
67 #ifdef COMPILER2
68 #include "opto/runtime.hpp"
69 #endif
70
71 class UnlockFlagSaver {
72 private:
73 JavaThread* _thread;
74 bool _do_not_unlock;
75 public:
76 UnlockFlagSaver(JavaThread* t) {
77 _thread = t;
78 _do_not_unlock = t->do_not_unlock_if_synchronized();
79 t->set_do_not_unlock_if_synchronized(false);
80 }
81 ~UnlockFlagSaver() {
82 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
83 }
84 };
85
86 //------------------------------------------------------------------------------------------------------------------------
87 // State accessors
88
89 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
90 LastFrameAccessor last_frame(thread);
91 last_frame.set_bcp(bcp);
92 if (ProfileInterpreter) {
93 // ProfileTraps uses MDOs independently of ProfileInterpreter.
94 // That is why we must check both ProfileInterpreter and mdo != NULL.
95 MethodData* mdo = last_frame.method()->method_data();
96 if (mdo != NULL) {
97 NEEDS_CLEANUP;
98 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
99 }
100 }
101 }
102
103 //------------------------------------------------------------------------------------------------------------------------
104 // Constants
105
106
107 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
108 // access constant pool
109 LastFrameAccessor last_frame(thread);
110 ConstantPool* pool = last_frame.method()->constants();
111 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
112 constantTag tag = pool->tag_at(index);
113
114 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
115 Klass* klass = pool->klass_at(index, CHECK);
116 oop java_class = klass->java_mirror();
117 thread->set_vm_result(java_class);
118 IRT_END
119
120 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
121 assert(bytecode == Bytecodes::_fast_aldc ||
122 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
123 ResourceMark rm(thread);
124 LastFrameAccessor last_frame(thread);
125 methodHandle m (thread, last_frame.method());
126 Bytecode_loadconstant ldc(m, last_frame.bci());
127 oop result = ldc.resolve_constant(CHECK);
128 #ifdef ASSERT
129 {
130 // The bytecode wrappers aren't GC-safe so construct a new one
131 Bytecode_loadconstant ldc2(m, last_frame.bci());
132 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
133 assert(result == coop, "expected result for assembly code");
134 }
135 #endif
136 thread->set_vm_result(result);
137 }
138 IRT_END
139
140
141 //------------------------------------------------------------------------------------------------------------------------
142 // Allocation
143
144 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
145 Klass* k = pool->klass_at(index, CHECK);
146 InstanceKlass* klass = InstanceKlass::cast(k);
147
148 // Make sure we are not instantiating an abstract klass
149 klass->check_valid_for_instantiation(true, CHECK);
150
151 // Make sure klass is initialized
152 klass->initialize(CHECK);
153
154 // At this point the class may not be fully initialized
155 // because of recursive initialization. If it is fully
156 // initialized & has_finalized is not set, we rewrite
157 // it into its fast version (Note: no locking is needed
158 // here since this is an atomic byte write and can be
159 // done more than once).
160 //
161 // Note: In case of classes with has_finalized we don't
162 // rewrite since that saves us an extra check in
163 // the fast version which then would call the
164 // slow version anyway (and do a call back into
165 // Java).
166 // If we have a breakpoint, then we don't rewrite
167 // because the _breakpoint bytecode would be lost.
168 oop obj = klass->allocate_instance(CHECK);
169 thread->set_vm_result(obj);
170 IRT_END
171
172
173 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
174 oop obj = oopFactory::new_typeArray(type, size, CHECK);
175 thread->set_vm_result(obj);
176 IRT_END
177
178
179 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
180 Klass* klass = pool->klass_at(index, CHECK);
181 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
182 thread->set_vm_result(obj);
183 IRT_END
184
185
186 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
187 // We may want to pass in more arguments - could make this slightly faster
188 LastFrameAccessor last_frame(thread);
189 ConstantPool* constants = last_frame.method()->constants();
190 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
191 Klass* klass = constants->klass_at(i, CHECK);
192 int nof_dims = last_frame.number_of_dimensions();
193 assert(klass->is_klass(), "not a class");
194 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
195
196 // We must create an array of jints to pass to multi_allocate.
197 ResourceMark rm(thread);
198 const int small_dims = 10;
199 jint dim_array[small_dims];
200 jint *dims = &dim_array[0];
201 if (nof_dims > small_dims) {
202 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
203 }
204 for (int index = 0; index < nof_dims; index++) {
205 // offset from first_size_address is addressed as local[index]
206 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
207 dims[index] = first_size_address[n];
208 }
209 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
210 thread->set_vm_result(obj);
211 IRT_END
212
213
214 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
215 assert(oopDesc::is_oop(obj), "must be a valid oop");
216 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
217 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
218 IRT_END
219
220
221 // Quicken instance-of and check-cast bytecodes
222 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
223 // Force resolving; quicken the bytecode
224 LastFrameAccessor last_frame(thread);
225 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
226 ConstantPool* cpool = last_frame.method()->constants();
227 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
228 // program we might have seen an unquick'd bytecode in the interpreter but have another
229 // thread quicken the bytecode before we get here.
230 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
231 Klass* klass = cpool->klass_at(which, CHECK);
232 thread->set_vm_result_2(klass);
233 IRT_END
234
235
236 //------------------------------------------------------------------------------------------------------------------------
237 // Exceptions
238
239 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
240 const methodHandle& trap_method, int trap_bci, TRAPS) {
241 if (trap_method.not_null()) {
242 MethodData* trap_mdo = trap_method->method_data();
243 if (trap_mdo == NULL) {
244 Method::build_interpreter_method_data(trap_method, THREAD);
245 if (HAS_PENDING_EXCEPTION) {
246 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
247 "we expect only an OOM error here");
248 CLEAR_PENDING_EXCEPTION;
249 }
250 trap_mdo = trap_method->method_data();
251 // and fall through...
252 }
253 if (trap_mdo != NULL) {
254 // Update per-method count of trap events. The interpreter
255 // is updating the MDO to simulate the effect of compiler traps.
256 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
257 }
258 }
259 }
260
261 // Assume the compiler is (or will be) interested in this event.
262 // If necessary, create an MDO to hold the information, and record it.
263 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
264 assert(ProfileTraps, "call me only if profiling");
265 LastFrameAccessor last_frame(thread);
266 methodHandle trap_method(thread, last_frame.method());
267 int trap_bci = trap_method->bci_from(last_frame.bcp());
268 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
269 }
270
271 #ifdef CC_INTERP
272 // As legacy note_trap, but we have more arguments.
273 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
274 methodHandle trap_method(method);
275 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
276 IRT_END
277
278 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
279 // for each exception.
280 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
281 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
282 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
283 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
284 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
285 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
286 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
287 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
288 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
289 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
290 #endif // CC_INTERP
291
292
293 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
294 // get klass
295 InstanceKlass* klass = InstanceKlass::cast(k);
296 assert(klass->is_initialized(),
297 "this klass should have been initialized during VM initialization");
298 // create instance - do not call constructor since we may have no
299 // (java) stack space left (should assert constructor is empty)
300 Handle exception;
301 oop exception_oop = klass->allocate_instance(CHECK_(exception));
302 exception = Handle(THREAD, exception_oop);
303 if (StackTraceInThrowable) {
304 java_lang_Throwable::fill_in_stack_trace(exception);
305 }
306 return exception;
307 }
308
309 // Special handling for stack overflow: since we don't have any (java) stack
310 // space left we use the pre-allocated & pre-initialized StackOverflowError
311 // klass to create an stack overflow error instance. We do not call its
312 // constructor for the same reason (it is empty, anyway).
313 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
314 Handle exception = get_preinitialized_exception(
315 SystemDictionary::StackOverflowError_klass(),
316 CHECK);
317 // Increment counter for hs_err file reporting
318 Atomic::inc(&Exceptions::_stack_overflow_errors);
319 THROW_HANDLE(exception);
320 IRT_END
321
322 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
323 Handle exception = get_preinitialized_exception(
324 SystemDictionary::StackOverflowError_klass(),
325 CHECK);
326 java_lang_Throwable::set_message(exception(),
327 Universe::delayed_stack_overflow_error_message());
328 // Increment counter for hs_err file reporting
329 Atomic::inc(&Exceptions::_stack_overflow_errors);
330 THROW_HANDLE(exception);
331 IRT_END
332
333 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
334 // lookup exception klass
335 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
336 if (ProfileTraps) {
337 if (s == vmSymbols::java_lang_ArithmeticException()) {
338 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
339 } else if (s == vmSymbols::java_lang_NullPointerException()) {
340 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
341 }
342 }
343 // create exception
344 Handle exception = Exceptions::new_exception(thread, s, message);
345 thread->set_vm_result(exception());
346 IRT_END
347
348
349 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
350 ResourceMark rm(thread);
351 const char* klass_name = obj->klass()->external_name();
352 // lookup exception klass
353 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
354 if (ProfileTraps) {
355 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
356 }
357 // create exception, with klass name as detail message
358 Handle exception = Exceptions::new_exception(thread, s, klass_name);
359 thread->set_vm_result(exception());
360 IRT_END
361
362
363 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
364 char message[jintAsStringSize];
365 // lookup exception klass
366 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
367 if (ProfileTraps) {
368 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
369 }
370 // create exception
371 sprintf(message, "%d", index);
372 THROW_MSG(s, message);
373 IRT_END
374
375 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
376 JavaThread* thread, oopDesc* obj))
377
378 ResourceMark rm(thread);
379 char* message = SharedRuntime::generate_class_cast_message(
380 thread, obj->klass());
381
382 if (ProfileTraps) {
383 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
384 }
385
386 // create exception
387 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
388 IRT_END
389
390 // exception_handler_for_exception(...) returns the continuation address,
391 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
392 // The exception oop is returned to make sure it is preserved over GC (it
393 // is only on the stack if the exception was thrown explicitly via athrow).
394 // During this operation, the expression stack contains the values for the
395 // bci where the exception happened. If the exception was propagated back
396 // from a call, the expression stack contains the values for the bci at the
397 // invoke w/o arguments (i.e., as if one were inside the call).
398 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
399
400 LastFrameAccessor last_frame(thread);
401 Handle h_exception(thread, exception);
402 methodHandle h_method (thread, last_frame.method());
403 constantPoolHandle h_constants(thread, h_method->constants());
404 bool should_repeat;
405 int handler_bci;
406 int current_bci = last_frame.bci();
407
408 if (thread->frames_to_pop_failed_realloc() > 0) {
409 // Allocation of scalar replaced object used in this frame
410 // failed. Unconditionally pop the frame.
411 thread->dec_frames_to_pop_failed_realloc();
412 thread->set_vm_result(h_exception());
413 // If the method is synchronized we already unlocked the monitor
414 // during deoptimization so the interpreter needs to skip it when
415 // the frame is popped.
416 thread->set_do_not_unlock_if_synchronized(true);
417 #ifdef CC_INTERP
418 return (address) -1;
419 #else
420 return Interpreter::remove_activation_entry();
421 #endif
422 }
423
424 // Need to do this check first since when _do_not_unlock_if_synchronized
425 // is set, we don't want to trigger any classloading which may make calls
426 // into java, or surprisingly find a matching exception handler for bci 0
427 // since at this moment the method hasn't been "officially" entered yet.
428 if (thread->do_not_unlock_if_synchronized()) {
429 ResourceMark rm;
430 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
431 thread->set_vm_result(exception);
432 #ifdef CC_INTERP
433 return (address) -1;
434 #else
435 return Interpreter::remove_activation_entry();
436 #endif
437 }
438
439 do {
440 should_repeat = false;
441
442 // assertions
443 #ifdef ASSERT
444 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
445 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
446 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
447 if (ExitVMOnVerifyError) vm_exit(-1);
448 ShouldNotReachHere();
449 }
450 #endif
451
452 // tracing
453 if (log_is_enabled(Info, exceptions)) {
454 ResourceMark rm(thread);
455 stringStream tempst;
456 tempst.print("interpreter method <%s>\n"
457 " at bci %d for thread " INTPTR_FORMAT,
458 h_method->print_value_string(), current_bci, p2i(thread));
459 Exceptions::log_exception(h_exception, tempst);
460 }
461 // Don't go paging in something which won't be used.
462 // else if (extable->length() == 0) {
463 // // disabled for now - interpreter is not using shortcut yet
464 // // (shortcut is not to call runtime if we have no exception handlers)
465 // // warning("performance bug: should not call runtime if method has no exception handlers");
466 // }
467 // for AbortVMOnException flag
468 Exceptions::debug_check_abort(h_exception);
469
470 // exception handler lookup
471 Klass* klass = h_exception->klass();
472 handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
473 if (HAS_PENDING_EXCEPTION) {
474 // We threw an exception while trying to find the exception handler.
475 // Transfer the new exception to the exception handle which will
476 // be set into thread local storage, and do another lookup for an
477 // exception handler for this exception, this time starting at the
478 // BCI of the exception handler which caused the exception to be
479 // thrown (bug 4307310).
480 h_exception = Handle(THREAD, PENDING_EXCEPTION);
481 CLEAR_PENDING_EXCEPTION;
482 if (handler_bci >= 0) {
483 current_bci = handler_bci;
484 should_repeat = true;
485 }
486 }
487 } while (should_repeat == true);
488
489 #if INCLUDE_JVMCI
490 if (EnableJVMCI && h_method->method_data() != NULL) {
491 ResourceMark rm(thread);
492 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
493 if (pdata != NULL && pdata->is_BitData()) {
494 BitData* bit_data = (BitData*) pdata;
495 bit_data->set_exception_seen();
496 }
497 }
498 #endif
499
500 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
501 // time throw or a stack unwinding throw and accordingly notify the debugger
502 if (JvmtiExport::can_post_on_exceptions()) {
503 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
504 }
505
506 #ifdef CC_INTERP
507 address continuation = (address)(intptr_t) handler_bci;
508 #else
509 address continuation = NULL;
510 #endif
511 address handler_pc = NULL;
512 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
513 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
514 // handler in this method, or (b) after a stack overflow there is not yet
515 // enough stack space available to reprotect the stack.
516 #ifndef CC_INTERP
517 continuation = Interpreter::remove_activation_entry();
518 #endif
519 #if COMPILER2_OR_JVMCI
520 // Count this for compilation purposes
521 h_method->interpreter_throwout_increment(THREAD);
522 #endif
523 } else {
524 // handler in this method => change bci/bcp to handler bci/bcp and continue there
525 handler_pc = h_method->code_base() + handler_bci;
526 #ifndef CC_INTERP
527 set_bcp_and_mdp(handler_pc, thread);
528 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
529 #endif
530 }
531 // notify debugger of an exception catch
532 // (this is good for exceptions caught in native methods as well)
533 if (JvmtiExport::can_post_on_exceptions()) {
534 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
535 }
536
537 thread->set_vm_result(h_exception());
538 return continuation;
539 IRT_END
540
541
542 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
543 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
544 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
545 IRT_END
546
547
548 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
549 THROW(vmSymbols::java_lang_AbstractMethodError());
550 IRT_END
551
552
553 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
554 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
555 IRT_END
556
557
558 //------------------------------------------------------------------------------------------------------------------------
559 // Fields
560 //
561
562 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
563 Thread* THREAD = thread;
564 // resolve field
565 fieldDescriptor info;
566 LastFrameAccessor last_frame(thread);
567 constantPoolHandle pool(thread, last_frame.method()->constants());
568 methodHandle m(thread, last_frame.method());
569 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
570 bytecode == Bytecodes::_putstatic);
571 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
572
573 {
574 JvmtiHideSingleStepping jhss(thread);
575 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
576 m, bytecode, CHECK);
577 } // end JvmtiHideSingleStepping
578
579 // check if link resolution caused cpCache to be updated
580 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
581 if (cp_cache_entry->is_resolved(bytecode)) return;
582
583 // compute auxiliary field attributes
584 TosState state = as_TosState(info.field_type());
585
586 // Resolution of put instructions on final fields is delayed. That is required so that
587 // exceptions are thrown at the correct place (when the instruction is actually invoked).
588 // If we do not resolve an instruction in the current pass, leaving the put_code
589 // set to zero will cause the next put instruction to the same field to reresolve.
590
591 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
592 // to final instance fields with updates originating from a method different than <init>)
593 // is inhibited. A putfield instruction targeting an instance final field must throw
594 // an IllegalAccessError if the instruction is not in an instance
595 // initializer method <init>. If resolution were not inhibited, a putfield
596 // in an initializer method could be resolved in the initializer. Subsequent
597 // putfield instructions to the same field would then use cached information.
598 // As a result, those instructions would not pass through the VM. That is,
599 // checks in resolve_field_access() would not be executed for those instructions
600 // and the required IllegalAccessError would not be thrown.
601 //
602 // Also, we need to delay resolving getstatic and putstatic instructions until the
603 // class is initialized. This is required so that access to the static
604 // field will call the initialization function every time until the class
605 // is completely initialized ala. in 2.17.5 in JVM Specification.
606 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
607 bool uninitialized_static = is_static && !klass->is_initialized();
608 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
609 info.has_initialized_final_update();
610 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
611
612 Bytecodes::Code get_code = (Bytecodes::Code)0;
613 Bytecodes::Code put_code = (Bytecodes::Code)0;
614 if (!uninitialized_static) {
615 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
616 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
617 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
618 }
619 }
620
621 cp_cache_entry->set_field(
622 get_code,
623 put_code,
624 info.field_holder(),
625 info.index(),
626 info.offset(),
627 state,
628 info.access_flags().is_final(),
629 info.access_flags().is_volatile(),
630 pool->pool_holder()
631 );
632 }
633
634
635 //------------------------------------------------------------------------------------------------------------------------
636 // Synchronization
637 //
638 // The interpreter's synchronization code is factored out so that it can
639 // be shared by method invocation and synchronized blocks.
640 //%note synchronization_3
641
642 //%note monitor_1
643 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
644 #ifdef ASSERT
645 thread->last_frame().interpreter_frame_verify_monitor(elem);
646 #endif
647 if (PrintBiasedLockingStatistics) {
648 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
649 }
650 Handle h_obj(thread, elem->obj());
651 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
652 "must be NULL or an object");
653 if (UseBiasedLocking) {
654 // Retry fast entry if bias is revoked to avoid unnecessary inflation
655 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
656 } else {
657 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
658 }
659 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
660 "must be NULL or an object");
661 #ifdef ASSERT
662 thread->last_frame().interpreter_frame_verify_monitor(elem);
663 #endif
664 IRT_END
665
666
667 //%note monitor_1
668 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
669 #ifdef ASSERT
670 thread->last_frame().interpreter_frame_verify_monitor(elem);
671 #endif
672 Handle h_obj(thread, elem->obj());
673 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
674 "must be NULL or an object");
675 if (elem == NULL || h_obj()->is_unlocked()) {
676 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
677 }
678 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
679 // Free entry. This must be done here, since a pending exception might be installed on
680 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
681 elem->set_obj(NULL);
682 #ifdef ASSERT
683 thread->last_frame().interpreter_frame_verify_monitor(elem);
684 #endif
685 IRT_END
686
687
688 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
689 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
690 IRT_END
691
692
693 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
694 // Returns an illegal exception to install into the current thread. The
695 // pending_exception flag is cleared so normal exception handling does not
696 // trigger. Any current installed exception will be overwritten. This
697 // method will be called during an exception unwind.
698
699 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
700 Handle exception(thread, thread->vm_result());
701 assert(exception() != NULL, "vm result should be set");
702 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
703 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
704 exception = get_preinitialized_exception(
705 SystemDictionary::IllegalMonitorStateException_klass(),
706 CATCH);
707 }
708 thread->set_vm_result(exception());
709 IRT_END
710
711
712 //------------------------------------------------------------------------------------------------------------------------
713 // Invokes
714
715 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
716 return method->orig_bytecode_at(method->bci_from(bcp));
717 IRT_END
718
719 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
720 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
721 IRT_END
722
723 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
724 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
725 IRT_END
726
727 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
728 Thread* THREAD = thread;
729 LastFrameAccessor last_frame(thread);
730 // extract receiver from the outgoing argument list if necessary
731 Handle receiver(thread, NULL);
732 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
733 bytecode == Bytecodes::_invokespecial) {
734 ResourceMark rm(thread);
735 methodHandle m (thread, last_frame.method());
736 Bytecode_invoke call(m, last_frame.bci());
737 Symbol* signature = call.signature();
738 receiver = Handle(thread, last_frame.callee_receiver(signature));
739
740 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
741 "sanity check");
742 assert(receiver.is_null() ||
743 !Universe::heap()->is_in_reserved(receiver->klass()),
744 "sanity check");
745 }
746
747 // resolve method
748 CallInfo info;
749 constantPoolHandle pool(thread, last_frame.method()->constants());
750
751 {
752 JvmtiHideSingleStepping jhss(thread);
753 LinkResolver::resolve_invoke(info, receiver, pool,
754 last_frame.get_index_u2_cpcache(bytecode), bytecode,
755 CHECK);
756 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
757 int retry_count = 0;
758 while (info.resolved_method()->is_old()) {
759 // It is very unlikely that method is redefined more than 100 times
760 // in the middle of resolve. If it is looping here more than 100 times
761 // means then there could be a bug here.
762 guarantee((retry_count++ < 100),
763 "Could not resolve to latest version of redefined method");
764 // method is redefined in the middle of resolve so re-try.
765 LinkResolver::resolve_invoke(info, receiver, pool,
766 last_frame.get_index_u2_cpcache(bytecode), bytecode,
767 CHECK);
768 }
769 }
770 } // end JvmtiHideSingleStepping
771
772 // check if link resolution caused cpCache to be updated
773 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
774 if (cp_cache_entry->is_resolved(bytecode)) return;
775
776 #ifdef ASSERT
777 if (bytecode == Bytecodes::_invokeinterface) {
778 if (info.resolved_method()->method_holder() ==
779 SystemDictionary::Object_klass()) {
780 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
781 // (see also CallInfo::set_interface for details)
782 assert(info.call_kind() == CallInfo::vtable_call ||
783 info.call_kind() == CallInfo::direct_call, "");
784 methodHandle rm = info.resolved_method();
785 assert(rm->is_final() || info.has_vtable_index(),
786 "should have been set already");
787 } else if (!info.resolved_method()->has_itable_index()) {
788 // Resolved something like CharSequence.toString. Use vtable not itable.
789 assert(info.call_kind() != CallInfo::itable_call, "");
790 } else {
791 // Setup itable entry
792 assert(info.call_kind() == CallInfo::itable_call, "");
793 int index = info.resolved_method()->itable_index();
794 assert(info.itable_index() == index, "");
795 }
796 } else if (bytecode == Bytecodes::_invokespecial) {
797 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
798 } else {
799 assert(info.call_kind() == CallInfo::direct_call ||
800 info.call_kind() == CallInfo::vtable_call, "");
801 }
802 #endif
803 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
804 // it is not an interface. The receiver for invokespecial calls within interface
805 // methods must be checked for every call.
806 InstanceKlass* sender = pool->pool_holder();
807 sender = sender->is_anonymous() ? sender->host_klass() : sender;
808
809 switch (info.call_kind()) {
810 case CallInfo::direct_call:
811 cp_cache_entry->set_direct_call(
812 bytecode,
813 info.resolved_method(),
814 sender->is_interface());
815 break;
816 case CallInfo::vtable_call:
817 cp_cache_entry->set_vtable_call(
818 bytecode,
819 info.resolved_method(),
820 info.vtable_index());
821 break;
822 case CallInfo::itable_call:
823 cp_cache_entry->set_itable_call(
824 bytecode,
825 info.resolved_method(),
826 info.itable_index());
827 break;
828 default: ShouldNotReachHere();
829 }
830 }
831
832
833 // First time execution: Resolve symbols, create a permanent MethodType object.
834 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
835 Thread* THREAD = thread;
836 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
837 LastFrameAccessor last_frame(thread);
838
839 // resolve method
840 CallInfo info;
841 constantPoolHandle pool(thread, last_frame.method()->constants());
842 {
843 JvmtiHideSingleStepping jhss(thread);
844 LinkResolver::resolve_invoke(info, Handle(), pool,
845 last_frame.get_index_u2_cpcache(bytecode), bytecode,
846 CHECK);
847 } // end JvmtiHideSingleStepping
848
849 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
850 cp_cache_entry->set_method_handle(pool, info);
851 }
852
853 // First time execution: Resolve symbols, create a permanent CallSite object.
854 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
855 Thread* THREAD = thread;
856 LastFrameAccessor last_frame(thread);
857 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
858
859 //TO DO: consider passing BCI to Java.
860 // int caller_bci = last_frame.method()->bci_from(last_frame.bcp());
861
862 // resolve method
863 CallInfo info;
864 constantPoolHandle pool(thread, last_frame.method()->constants());
865 int index = last_frame.get_index_u4(bytecode);
866 {
867 JvmtiHideSingleStepping jhss(thread);
868 LinkResolver::resolve_invoke(info, Handle(), pool,
869 index, bytecode, CHECK);
870 } // end JvmtiHideSingleStepping
871
872 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
873 cp_cache_entry->set_dynamic_call(pool, info);
874 }
875
876 // This function is the interface to the assembly code. It returns the resolved
877 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
878 // This function will check for redefinition!
879 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
880 switch (bytecode) {
881 case Bytecodes::_getstatic:
882 case Bytecodes::_putstatic:
883 case Bytecodes::_getfield:
884 case Bytecodes::_putfield:
885 resolve_get_put(thread, bytecode);
886 break;
887 case Bytecodes::_invokevirtual:
888 case Bytecodes::_invokespecial:
889 case Bytecodes::_invokestatic:
890 case Bytecodes::_invokeinterface:
891 resolve_invoke(thread, bytecode);
892 break;
893 case Bytecodes::_invokehandle:
894 resolve_invokehandle(thread);
895 break;
896 case Bytecodes::_invokedynamic:
897 resolve_invokedynamic(thread);
898 break;
899 default:
900 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
901 break;
902 }
903 }
904 IRT_END
905
906 //------------------------------------------------------------------------------------------------------------------------
907 // Miscellaneous
908
909
910 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
911 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
912 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
913 if (branch_bcp != NULL && nm != NULL) {
914 // This was a successful request for an OSR nmethod. Because
915 // frequency_counter_overflow_inner ends with a safepoint check,
916 // nm could have been unloaded so look it up again. It's unsafe
917 // to examine nm directly since it might have been freed and used
918 // for something else.
919 LastFrameAccessor last_frame(thread);
920 Method* method = last_frame.method();
921 int bci = method->bci_from(last_frame.bcp());
922 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
923 }
924 #ifndef PRODUCT
925 if (TraceOnStackReplacement) {
926 if (nm != NULL) {
927 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
928 nm->print();
929 }
930 }
931 #endif
932 return nm;
933 }
934
935 IRT_ENTRY(nmethod*,
936 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
937 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
938 // flag, in case this method triggers classloading which will call into Java.
939 UnlockFlagSaver fs(thread);
940
941 LastFrameAccessor last_frame(thread);
942 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
943 methodHandle method(thread, last_frame.method());
944 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
945 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
946
947 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
948 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
949 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
950
951 if (osr_nm != NULL) {
952 // We may need to do on-stack replacement which requires that no
953 // monitors in the activation are biased because their
954 // BasicObjectLocks will need to migrate during OSR. Force
955 // unbiasing of all monitors in the activation now (even though
956 // the OSR nmethod might be invalidated) because we don't have a
957 // safepoint opportunity later once the migration begins.
958 if (UseBiasedLocking) {
959 ResourceMark rm;
960 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
961 for( BasicObjectLock *kptr = last_frame.monitor_end();
962 kptr < last_frame.monitor_begin();
963 kptr = last_frame.next_monitor(kptr) ) {
964 if( kptr->obj() != NULL ) {
965 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
966 }
967 }
968 BiasedLocking::revoke(objects_to_revoke);
969 }
970 }
971 return osr_nm;
972 IRT_END
973
974 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
975 assert(ProfileInterpreter, "must be profiling interpreter");
976 int bci = method->bci_from(cur_bcp);
977 MethodData* mdo = method->method_data();
978 if (mdo == NULL) return 0;
979 return mdo->bci_to_di(bci);
980 IRT_END
981
982 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
983 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
984 // flag, in case this method triggers classloading which will call into Java.
985 UnlockFlagSaver fs(thread);
986
987 assert(ProfileInterpreter, "must be profiling interpreter");
988 LastFrameAccessor last_frame(thread);
989 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
990 methodHandle method(thread, last_frame.method());
991 Method::build_interpreter_method_data(method, THREAD);
992 if (HAS_PENDING_EXCEPTION) {
993 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
994 CLEAR_PENDING_EXCEPTION;
995 // and fall through...
996 }
997 IRT_END
998
999
1000 #ifdef ASSERT
1001 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1002 assert(ProfileInterpreter, "must be profiling interpreter");
1003
1004 MethodData* mdo = method->method_data();
1005 assert(mdo != NULL, "must not be null");
1006
1007 int bci = method->bci_from(bcp);
1008
1009 address mdp2 = mdo->bci_to_dp(bci);
1010 if (mdp != mdp2) {
1011 ResourceMark rm;
1012 ResetNoHandleMark rnm; // In a LEAF entry.
1013 HandleMark hm;
1014 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1015 int current_di = mdo->dp_to_di(mdp);
1016 int expected_di = mdo->dp_to_di(mdp2);
1017 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1018 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1019 int approx_bci = -1;
1020 if (current_di >= 0) {
1021 approx_bci = mdo->data_at(current_di)->bci();
1022 }
1023 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1024 mdo->print_on(tty);
1025 method->print_codes();
1026 }
1027 assert(mdp == mdp2, "wrong mdp");
1028 IRT_END
1029 #endif // ASSERT
1030
1031 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1032 assert(ProfileInterpreter, "must be profiling interpreter");
1033 ResourceMark rm(thread);
1034 HandleMark hm(thread);
1035 LastFrameAccessor last_frame(thread);
1036 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1037 MethodData* h_mdo = last_frame.method()->method_data();
1038
1039 // Grab a lock to ensure atomic access to setting the return bci and
1040 // the displacement. This can block and GC, invalidating all naked oops.
1041 MutexLocker ml(RetData_lock);
1042
1043 // ProfileData is essentially a wrapper around a derived oop, so we
1044 // need to take the lock before making any ProfileData structures.
1045 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1046 guarantee(data != NULL, "profile data must be valid");
1047 RetData* rdata = data->as_RetData();
1048 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1049 last_frame.set_mdp(new_mdp);
1050 IRT_END
1051
1052 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1053 MethodCounters* mcs = Method::build_method_counters(m, thread);
1054 if (HAS_PENDING_EXCEPTION) {
1055 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1056 CLEAR_PENDING_EXCEPTION;
1057 }
1058 return mcs;
1059 IRT_END
1060
1061
1062 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1063 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1064 // stack traversal automatically takes care of preserving arguments for invoke, so
1065 // this is no longer needed.
1066
1067 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1068 // if this is called during a safepoint
1069
1070 if (JvmtiExport::should_post_single_step()) {
1071 // We are called during regular safepoints and when the VM is
1072 // single stepping. If any thread is marked for single stepping,
1073 // then we may have JVMTI work to do.
1074 LastFrameAccessor last_frame(thread);
1075 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1076 }
1077 IRT_END
1078
1079 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1080 ConstantPoolCacheEntry *cp_entry))
1081
1082 // check the access_flags for the field in the klass
1083
1084 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1085 int index = cp_entry->field_index();
1086 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1087
1088 bool is_static = (obj == NULL);
1089 HandleMark hm(thread);
1090
1091 Handle h_obj;
1092 if (!is_static) {
1093 // non-static field accessors have an object, but we need a handle
1094 h_obj = Handle(thread, obj);
1095 }
1096 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1097 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1098 LastFrameAccessor last_frame(thread);
1099 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1100 IRT_END
1101
1102 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1103 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1104
1105 Klass* k = cp_entry->f1_as_klass();
1106
1107 // check the access_flags for the field in the klass
1108 InstanceKlass* ik = InstanceKlass::cast(k);
1109 int index = cp_entry->field_index();
1110 // bail out if field modifications are not watched
1111 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1112
1113 char sig_type = '\0';
1114
1115 switch(cp_entry->flag_state()) {
1116 case btos: sig_type = 'B'; break;
1117 case ztos: sig_type = 'Z'; break;
1118 case ctos: sig_type = 'C'; break;
1119 case stos: sig_type = 'S'; break;
1120 case itos: sig_type = 'I'; break;
1121 case ftos: sig_type = 'F'; break;
1122 case atos: sig_type = 'L'; break;
1123 case ltos: sig_type = 'J'; break;
1124 case dtos: sig_type = 'D'; break;
1125 default: ShouldNotReachHere(); return;
1126 }
1127 bool is_static = (obj == NULL);
1128
1129 HandleMark hm(thread);
1130 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1131 jvalue fvalue;
1132 #ifdef _LP64
1133 fvalue = *value;
1134 #else
1135 // Long/double values are stored unaligned and also noncontiguously with
1136 // tagged stacks. We can't just do a simple assignment even in the non-
1137 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1138 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1139 // We assume that the two halves of longs/doubles are stored in interpreter
1140 // stack slots in platform-endian order.
1141 jlong_accessor u;
1142 jint* newval = (jint*)value;
1143 u.words[0] = newval[0];
1144 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1145 fvalue.j = u.long_value;
1146 #endif // _LP64
1147
1148 Handle h_obj;
1149 if (!is_static) {
1150 // non-static field accessors have an object, but we need a handle
1151 h_obj = Handle(thread, obj);
1152 }
1153
1154 LastFrameAccessor last_frame(thread);
1155 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1156 fid, sig_type, &fvalue);
1157 IRT_END
1158
1159 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1160 LastFrameAccessor last_frame(thread);
1161 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1162 IRT_END
1163
1164
1165 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1166 LastFrameAccessor last_frame(thread);
1167 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1168 IRT_END
1169
1170 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1171 {
1172 return (Interpreter::contains(pc) ? 1 : 0);
1173 }
1174 IRT_END
1175
1176
1177 // Implementation of SignatureHandlerLibrary
1178
1179 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1180 // Dummy definition (else normalization method is defined in CPU
1181 // dependant code)
1182 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1183 return fingerprint;
1184 }
1185 #endif
1186
1187 address SignatureHandlerLibrary::set_handler_blob() {
1188 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1189 if (handler_blob == NULL) {
1190 return NULL;
1191 }
1192 address handler = handler_blob->code_begin();
1193 _handler_blob = handler_blob;
1194 _handler = handler;
1195 return handler;
1196 }
1197
1198 void SignatureHandlerLibrary::initialize() {
1199 if (_fingerprints != NULL) {
1200 return;
1201 }
1202 if (set_handler_blob() == NULL) {
1203 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1204 }
1205
1206 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1207 SignatureHandlerLibrary::buffer_size);
1208 _buffer = bb->code_begin();
1209
1210 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1211 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1212 }
1213
1214 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1215 address handler = _handler;
1216 int insts_size = buffer->pure_insts_size();
1217 if (handler + insts_size > _handler_blob->code_end()) {
1218 // get a new handler blob
1219 handler = set_handler_blob();
1220 }
1221 if (handler != NULL) {
1222 memcpy(handler, buffer->insts_begin(), insts_size);
1223 pd_set_handler(handler);
1224 ICache::invalidate_range(handler, insts_size);
1225 _handler = handler + insts_size;
1226 }
1227 return handler;
1228 }
1229
1230 void SignatureHandlerLibrary::add(const methodHandle& method) {
1231 if (method->signature_handler() == NULL) {
1232 // use slow signature handler if we can't do better
1233 int handler_index = -1;
1234 // check if we can use customized (fast) signature handler
1235 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1236 // use customized signature handler
1237 MutexLocker mu(SignatureHandlerLibrary_lock);
1238 // make sure data structure is initialized
1239 initialize();
1240 // lookup method signature's fingerprint
1241 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1242 // allow CPU dependant code to optimize the fingerprints for the fast handler
1243 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1244 handler_index = _fingerprints->find(fingerprint);
1245 // create handler if necessary
1246 if (handler_index < 0) {
1247 ResourceMark rm;
1248 ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1249 CodeBuffer buffer((address)(_buffer + align_offset),
1250 SignatureHandlerLibrary::buffer_size - align_offset);
1251 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1252 // copy into code heap
1253 address handler = set_handler(&buffer);
1254 if (handler == NULL) {
1255 // use slow signature handler (without memorizing it in the fingerprints)
1256 } else {
1257 // debugging suppport
1258 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1259 ttyLocker ttyl;
1260 tty->cr();
1261 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1262 _handlers->length(),
1263 (method->is_static() ? "static" : "receiver"),
1264 method->name_and_sig_as_C_string(),
1265 fingerprint,
1266 buffer.insts_size());
1267 if (buffer.insts_size() > 0) {
1268 Disassembler::decode(handler, handler + buffer.insts_size());
1269 }
1270 #ifndef PRODUCT
1271 address rh_begin = Interpreter::result_handler(method()->result_type());
1272 if (CodeCache::contains(rh_begin)) {
1273 // else it might be special platform dependent values
1274 tty->print_cr(" --- associated result handler ---");
1275 address rh_end = rh_begin;
1276 while (*(int*)rh_end != 0) {
1277 rh_end += sizeof(int);
1278 }
1279 Disassembler::decode(rh_begin, rh_end);
1280 } else {
1281 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1282 }
1283 #endif
1284 }
1285 // add handler to library
1286 _fingerprints->append(fingerprint);
1287 _handlers->append(handler);
1288 // set handler index
1289 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1290 handler_index = _fingerprints->length() - 1;
1291 }
1292 }
1293 // Set handler under SignatureHandlerLibrary_lock
1294 if (handler_index < 0) {
1295 // use generic signature handler
1296 method->set_signature_handler(Interpreter::slow_signature_handler());
1297 } else {
1298 // set handler
1299 method->set_signature_handler(_handlers->at(handler_index));
1300 }
1301 } else {
1302 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1303 // use generic signature handler
1304 method->set_signature_handler(Interpreter::slow_signature_handler());
1305 }
1306 }
1307 #ifdef ASSERT
1308 int handler_index = -1;
1309 int fingerprint_index = -2;
1310 {
1311 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1312 // in any way if accessed from multiple threads. To avoid races with another
1313 // thread which may change the arrays in the above, mutex protected block, we
1314 // have to protect this read access here with the same mutex as well!
1315 MutexLocker mu(SignatureHandlerLibrary_lock);
1316 if (_handlers != NULL) {
1317 handler_index = _handlers->find(method->signature_handler());
1318 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1319 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1320 fingerprint_index = _fingerprints->find(fingerprint);
1321 }
1322 }
1323 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1324 handler_index == fingerprint_index, "sanity check");
1325 #endif // ASSERT
1326 }
1327
1328 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1329 int handler_index = -1;
1330 // use customized signature handler
1331 MutexLocker mu(SignatureHandlerLibrary_lock);
1332 // make sure data structure is initialized
1333 initialize();
1334 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1335 handler_index = _fingerprints->find(fingerprint);
1336 // create handler if necessary
1337 if (handler_index < 0) {
1338 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1339 tty->cr();
1340 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1341 _handlers->length(),
1342 p2i(handler),
1343 fingerprint);
1344 }
1345 _fingerprints->append(fingerprint);
1346 _handlers->append(handler);
1347 } else {
1348 if (PrintSignatureHandlers) {
1349 tty->cr();
1350 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1351 _handlers->length(),
1352 fingerprint,
1353 p2i(_handlers->at(handler_index)),
1354 p2i(handler));
1355 }
1356 }
1357 }
1358
1359
1360 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1361 address SignatureHandlerLibrary::_handler = NULL;
1362 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1363 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1364 address SignatureHandlerLibrary::_buffer = NULL;
1365
1366
1367 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1368 methodHandle m(thread, method);
1369 assert(m->is_native(), "sanity check");
1370 // lookup native function entry point if it doesn't exist
1371 bool in_base_library;
1372 if (!m->has_native_function()) {
1373 NativeLookup::lookup(m, in_base_library, CHECK);
1374 }
1375 // make sure signature handler is installed
1376 SignatureHandlerLibrary::add(m);
1377 // The interpreter entry point checks the signature handler first,
1378 // before trying to fetch the native entry point and klass mirror.
1379 // We must set the signature handler last, so that multiple processors
1380 // preparing the same method will be sure to see non-null entry & mirror.
1381 IRT_END
1382
1383 #if defined(IA32) || defined(AMD64) || defined(ARM)
1384 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1385 if (src_address == dest_address) {
1386 return;
1387 }
1388 ResetNoHandleMark rnm; // In a LEAF entry.
1389 HandleMark hm;
1390 ResourceMark rm;
1391 LastFrameAccessor last_frame(thread);
1392 assert(last_frame.is_interpreted_frame(), "");
1393 jint bci = last_frame.bci();
1394 methodHandle mh(thread, last_frame.method());
1395 Bytecode_invoke invoke(mh, bci);
1396 ArgumentSizeComputer asc(invoke.signature());
1397 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1398 Copy::conjoint_jbytes(src_address, dest_address,
1399 size_of_arguments * Interpreter::stackElementSize);
1400 IRT_END
1401 #endif
1402
1403 #if INCLUDE_JVMTI
1404 // This is a support of the JVMTI PopFrame interface.
1405 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1406 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1407 // The member_name argument is a saved reference (in local#0) to the member_name.
1408 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1409 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1410 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1411 Method* method, address bcp))
1412 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1413 if (code != Bytecodes::_invokestatic) {
1414 return;
1415 }
1416 ConstantPool* cpool = method->constants();
1417 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1418 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1419 Symbol* mname = cpool->name_ref_at(cp_index);
1420
1421 if (MethodHandles::has_member_arg(cname, mname)) {
1422 oop member_name_oop = (oop) member_name;
1423 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1424 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1425 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1426 }
1427 thread->set_vm_result(member_name_oop);
1428 } else {
1429 thread->set_vm_result(NULL);
1430 }
1431 IRT_END
1432 #endif // INCLUDE_JVMTI
1433
1434 #ifndef PRODUCT
1435 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1436 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1437 // The generated code still uses call_VM because that will set up the frame pointer for
1438 // bcp and method.
1439 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1440 LastFrameAccessor last_frame(thread);
1441 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1442 methodHandle mh(thread, last_frame.method());
1443 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1444 return preserve_this_value;
1445 IRT_END
1446 #endif // !PRODUCT