1 /*
2 * Copyright (c) 1997, 2012, 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/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "gc_interface/collectedHeap.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "interpreter/templateTable.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/constantPool.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/methodData.hpp"
40 #include "oops/objArrayKlass.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/symbol.hpp"
43 #include "prims/jvmtiExport.hpp"
44 #include "prims/nativeLookup.hpp"
45 #include "runtime/biasedLocking.hpp"
46 #include "runtime/compilationPolicy.hpp"
47 #include "runtime/deoptimization.hpp"
48 #include "runtime/fieldDescriptor.hpp"
49 #include "runtime/handles.inline.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/jfieldIDWorkaround.hpp"
53 #include "runtime/osThread.hpp"
54 #include "runtime/sharedRuntime.hpp"
55 #include "runtime/stubRoutines.hpp"
56 #include "runtime/synchronizer.hpp"
57 #include "runtime/threadCritical.hpp"
58 #include "utilities/events.hpp"
59 #ifdef TARGET_ARCH_x86
60 # include "vm_version_x86.hpp"
61 #endif
62 #ifdef TARGET_ARCH_sparc
63 # include "vm_version_sparc.hpp"
64 #endif
65 #ifdef TARGET_ARCH_zero
66 # include "vm_version_zero.hpp"
67 #endif
68 #ifdef TARGET_ARCH_arm
69 # include "vm_version_arm.hpp"
70 #endif
71 #ifdef TARGET_ARCH_ppc
72 # include "vm_version_ppc.hpp"
73 #endif
74 #ifdef COMPILER2
75 #include "opto/runtime.hpp"
76 #endif
77
78 class UnlockFlagSaver {
79 private:
80 JavaThread* _thread;
81 bool _do_not_unlock;
82 public:
83 UnlockFlagSaver(JavaThread* t) {
84 _thread = t;
85 _do_not_unlock = t->do_not_unlock_if_synchronized();
86 t->set_do_not_unlock_if_synchronized(false);
87 }
88 ~UnlockFlagSaver() {
89 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
90 }
91 };
92
93 //------------------------------------------------------------------------------------------------------------------------
94 // State accessors
95
96 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
97 last_frame(thread).interpreter_frame_set_bcp(bcp);
98 if (ProfileInterpreter) {
99 // ProfileTraps uses MDOs independently of ProfileInterpreter.
100 // That is why we must check both ProfileInterpreter and mdo != NULL.
101 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
102 if (mdo != NULL) {
103 NEEDS_CLEANUP;
104 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
105 }
106 }
107 }
108
109 //------------------------------------------------------------------------------------------------------------------------
110 // Constants
111
112
113 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
114 // access constant pool
115 ConstantPool* pool = method(thread)->constants();
116 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
117 constantTag tag = pool->tag_at(index);
118
119 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
120 Klass* klass = pool->klass_at(index, CHECK);
121 oop java_class = klass->java_mirror();
122 thread->set_vm_result(java_class);
123 IRT_END
124
125 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
126 assert(bytecode == Bytecodes::_fast_aldc ||
127 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
128 ResourceMark rm(thread);
129 methodHandle m (thread, method(thread));
130 Bytecode_loadconstant ldc(m, bci(thread));
131 oop result = ldc.resolve_constant(CHECK);
132 #ifdef ASSERT
133 {
134 // The bytecode wrappers aren't GC-safe so construct a new one
135 Bytecode_loadconstant ldc2(m, bci(thread));
136 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
137 assert(result == coop, "expected result for assembly code");
138 }
139 #endif
140 thread->set_vm_result(result);
141 }
142 IRT_END
143
144
145 //------------------------------------------------------------------------------------------------------------------------
146 // Allocation
147
148 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
149 Klass* k_oop = pool->klass_at(index, CHECK);
150 instanceKlassHandle klass (THREAD, k_oop);
151
152 // Make sure we are not instantiating an abstract klass
153 klass->check_valid_for_instantiation(true, CHECK);
154
155 // Make sure klass is initialized
156 klass->initialize(CHECK);
157
158 // At this point the class may not be fully initialized
159 // because of recursive initialization. If it is fully
160 // initialized & has_finalized is not set, we rewrite
161 // it into its fast version (Note: no locking is needed
162 // here since this is an atomic byte write and can be
163 // done more than once).
164 //
165 // Note: In case of classes with has_finalized we don't
166 // rewrite since that saves us an extra check in
167 // the fast version which then would call the
168 // slow version anyway (and do a call back into
169 // Java).
170 // If we have a breakpoint, then we don't rewrite
171 // because the _breakpoint bytecode would be lost.
172 oop obj = klass->allocate_instance(CHECK);
173 thread->set_vm_result(obj);
174 IRT_END
175
176
177 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
178 oop obj = oopFactory::new_typeArray(type, size, CHECK);
179 thread->set_vm_result(obj);
180 IRT_END
181
182
183 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
184 // Note: no oopHandle for pool & klass needed since they are not used
185 // anymore after new_objArray() and no GC can happen before.
186 // (This may have to change if this code changes!)
187 Klass* klass = pool->klass_at(index, CHECK);
188 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
189 thread->set_vm_result(obj);
190 IRT_END
191
192
193 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
194 // We may want to pass in more arguments - could make this slightly faster
195 ConstantPool* constants = method(thread)->constants();
196 int i = get_index_u2(thread, Bytecodes::_multianewarray);
197 Klass* klass = constants->klass_at(i, CHECK);
198 int nof_dims = number_of_dimensions(thread);
199 assert(klass->is_klass(), "not a class");
200 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
201
202 // We must create an array of jints to pass to multi_allocate.
203 ResourceMark rm(thread);
204 const int small_dims = 10;
205 jint dim_array[small_dims];
206 jint *dims = &dim_array[0];
207 if (nof_dims > small_dims) {
208 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
209 }
210 for (int index = 0; index < nof_dims; index++) {
211 // offset from first_size_address is addressed as local[index]
212 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
213 dims[index] = first_size_address[n];
214 }
215 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
216 thread->set_vm_result(obj);
217 IRT_END
218
219
220 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
221 assert(obj->is_oop(), "must be a valid oop");
222 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
223 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
224 IRT_END
225
226
227 // Quicken instance-of and check-cast bytecodes
228 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
229 // Force resolving; quicken the bytecode
230 int which = get_index_u2(thread, Bytecodes::_checkcast);
231 ConstantPool* cpool = method(thread)->constants();
232 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
233 // program we might have seen an unquick'd bytecode in the interpreter but have another
234 // thread quicken the bytecode before we get here.
235 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
236 Klass* klass = cpool->klass_at(which, CHECK);
237 thread->set_vm_result_2(klass);
238 IRT_END
239
240
241 //------------------------------------------------------------------------------------------------------------------------
242 // Exceptions
243
244 // Assume the compiler is (or will be) interested in this event.
245 // If necessary, create an MDO to hold the information, and record it.
246 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
247 assert(ProfileTraps, "call me only if profiling");
248 methodHandle trap_method(thread, method(thread));
249
250 if (trap_method.not_null()) {
251 MethodData* trap_mdo = trap_method->method_data();
252 if (trap_mdo == NULL) {
253 Method::build_interpreter_method_data(trap_method, THREAD);
254 if (HAS_PENDING_EXCEPTION) {
255 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
256 CLEAR_PENDING_EXCEPTION;
257 }
258 trap_mdo = trap_method->method_data();
259 // and fall through...
260 }
261 if (trap_mdo != NULL) {
262 // Update per-method count of trap events. The interpreter
263 // is updating the MDO to simulate the effect of compiler traps.
264 int trap_bci = trap_method->bci_from(bcp(thread));
265 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
266 }
267 }
268 }
269
270 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
271 // get klass
272 InstanceKlass* klass = InstanceKlass::cast(k);
273 assert(klass->is_initialized(),
274 "this klass should have been initialized during VM initialization");
275 // create instance - do not call constructor since we may have no
276 // (java) stack space left (should assert constructor is empty)
277 Handle exception;
278 oop exception_oop = klass->allocate_instance(CHECK_(exception));
279 exception = Handle(THREAD, exception_oop);
280 if (StackTraceInThrowable) {
281 java_lang_Throwable::fill_in_stack_trace(exception);
282 }
283 return exception;
284 }
285
286 // Special handling for stack overflow: since we don't have any (java) stack
287 // space left we use the pre-allocated & pre-initialized StackOverflowError
288 // klass to create an stack overflow error instance. We do not call its
289 // constructor for the same reason (it is empty, anyway).
290 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
291 Handle exception = get_preinitialized_exception(
292 SystemDictionary::StackOverflowError_klass(),
293 CHECK);
294 THROW_HANDLE(exception);
295 IRT_END
296
297
298 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
299 // lookup exception klass
300 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
301 if (ProfileTraps) {
302 if (s == vmSymbols::java_lang_ArithmeticException()) {
303 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
304 } else if (s == vmSymbols::java_lang_NullPointerException()) {
305 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
306 }
307 }
308 // create exception
309 Handle exception = Exceptions::new_exception(thread, s, message);
310 thread->set_vm_result(exception());
311 IRT_END
312
313
314 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
315 ResourceMark rm(thread);
316 const char* klass_name = obj->klass()->external_name();
317 // lookup exception klass
318 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
319 if (ProfileTraps) {
320 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
321 }
322 // create exception, with klass name as detail message
323 Handle exception = Exceptions::new_exception(thread, s, klass_name);
324 thread->set_vm_result(exception());
325 IRT_END
326
327
328 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
329 char message[jintAsStringSize];
330 // lookup exception klass
331 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
332 if (ProfileTraps) {
333 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
334 }
335 // create exception
336 sprintf(message, "%d", index);
337 THROW_MSG(s, message);
338 IRT_END
339
340 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
341 JavaThread* thread, oopDesc* obj))
342
343 ResourceMark rm(thread);
344 char* message = SharedRuntime::generate_class_cast_message(
345 thread, obj->klass()->external_name());
346
347 if (ProfileTraps) {
348 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
349 }
350
351 // create exception
352 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
353 IRT_END
354
355 // exception_handler_for_exception(...) returns the continuation address,
356 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
357 // The exception oop is returned to make sure it is preserved over GC (it
358 // is only on the stack if the exception was thrown explicitly via athrow).
359 // During this operation, the expression stack contains the values for the
360 // bci where the exception happened. If the exception was propagated back
361 // from a call, the expression stack contains the values for the bci at the
362 // invoke w/o arguments (i.e., as if one were inside the call).
363 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
364
365 Handle h_exception(thread, exception);
366 methodHandle h_method (thread, method(thread));
367 constantPoolHandle h_constants(thread, h_method->constants());
368 bool should_repeat;
369 int handler_bci;
370 int current_bci = bci(thread);
371
372 // Need to do this check first since when _do_not_unlock_if_synchronized
373 // is set, we don't want to trigger any classloading which may make calls
374 // into java, or surprisingly find a matching exception handler for bci 0
375 // since at this moment the method hasn't been "officially" entered yet.
376 if (thread->do_not_unlock_if_synchronized()) {
377 ResourceMark rm;
378 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
379 thread->set_vm_result(exception);
380 #ifdef CC_INTERP
381 return (address) -1;
382 #else
383 return Interpreter::remove_activation_entry();
384 #endif
385 }
386
387 do {
388 should_repeat = false;
389
390 // assertions
391 #ifdef ASSERT
392 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
393 assert(h_exception->is_oop(), "just checking");
394 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
395 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
396 if (ExitVMOnVerifyError) vm_exit(-1);
397 ShouldNotReachHere();
398 }
399 #endif
400
401 // tracing
402 if (TraceExceptions) {
403 ttyLocker ttyl;
404 ResourceMark rm(thread);
405 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception());
406 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
407 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
408 }
409 // Don't go paging in something which won't be used.
410 // else if (extable->length() == 0) {
411 // // disabled for now - interpreter is not using shortcut yet
412 // // (shortcut is not to call runtime if we have no exception handlers)
413 // // warning("performance bug: should not call runtime if method has no exception handlers");
414 // }
415 // for AbortVMOnException flag
416 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
417
418 // exception handler lookup
419 KlassHandle h_klass(THREAD, h_exception->klass());
420 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
421 if (HAS_PENDING_EXCEPTION) {
422 // We threw an exception while trying to find the exception handler.
423 // Transfer the new exception to the exception handle which will
424 // be set into thread local storage, and do another lookup for an
425 // exception handler for this exception, this time starting at the
426 // BCI of the exception handler which caused the exception to be
427 // thrown (bug 4307310).
428 h_exception = Handle(THREAD, PENDING_EXCEPTION);
429 CLEAR_PENDING_EXCEPTION;
430 if (handler_bci >= 0) {
431 current_bci = handler_bci;
432 should_repeat = true;
433 }
434 }
435 } while (should_repeat == true);
436
437 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
438 // time throw or a stack unwinding throw and accordingly notify the debugger
439 if (JvmtiExport::can_post_on_exceptions()) {
440 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
441 }
442
443 #ifdef CC_INTERP
444 address continuation = (address)(intptr_t) handler_bci;
445 #else
446 address continuation = NULL;
447 #endif
448 address handler_pc = NULL;
449 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
450 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
451 // handler in this method, or (b) after a stack overflow there is not yet
452 // enough stack space available to reprotect the stack.
453 #ifndef CC_INTERP
454 continuation = Interpreter::remove_activation_entry();
455 #endif
456 // Count this for compilation purposes
457 h_method->interpreter_throwout_increment();
458 } else {
459 // handler in this method => change bci/bcp to handler bci/bcp and continue there
460 handler_pc = h_method->code_base() + handler_bci;
461 #ifndef CC_INTERP
462 set_bcp_and_mdp(handler_pc, thread);
463 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
464 #endif
465 }
466 // notify debugger of an exception catch
467 // (this is good for exceptions caught in native methods as well)
468 if (JvmtiExport::can_post_on_exceptions()) {
469 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
470 }
471
472 thread->set_vm_result(h_exception());
473 return continuation;
474 IRT_END
475
476
477 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
478 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
479 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
480 IRT_END
481
482
483 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
484 THROW(vmSymbols::java_lang_AbstractMethodError());
485 IRT_END
486
487
488 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
489 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
490 IRT_END
491
492
493 //------------------------------------------------------------------------------------------------------------------------
494 // Fields
495 //
496
497 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
498 // resolve field
499 FieldAccessInfo info;
500 constantPoolHandle pool(thread, method(thread)->constants());
501 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic);
502 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
503
504 {
505 JvmtiHideSingleStepping jhss(thread);
506 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode),
507 bytecode, false, CHECK);
508 } // end JvmtiHideSingleStepping
509
510 // check if link resolution caused cpCache to be updated
511 if (already_resolved(thread)) return;
512
513 // compute auxiliary field attributes
514 TosState state = as_TosState(info.field_type());
515
516 // We need to delay resolving put instructions on final fields
517 // until we actually invoke one. This is required so we throw
518 // exceptions at the correct place. If we do not resolve completely
519 // in the current pass, leaving the put_code set to zero will
520 // cause the next put instruction to reresolve.
521 Bytecodes::Code put_code = (Bytecodes::Code)0;
522
523 // We also need to delay resolving getstatic instructions until the
524 // class is intitialized. This is required so that access to the static
525 // field will call the initialization function every time until the class
526 // is completely initialized ala. in 2.17.5 in JVM Specification.
527 InstanceKlass *klass = InstanceKlass::cast(info.klass()());
528 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
529 !klass->is_initialized());
530 Bytecodes::Code get_code = (Bytecodes::Code)0;
531
532 if (!uninitialized_static) {
533 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
534 if (is_put || !info.access_flags().is_final()) {
535 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
536 }
537 }
538
539 cache_entry(thread)->set_field(
540 get_code,
541 put_code,
542 info.klass(),
543 info.field_index(),
544 info.field_offset(),
545 state,
546 info.access_flags().is_final(),
547 info.access_flags().is_volatile(),
548 pool->pool_holder()
549 );
550 IRT_END
551
552
553 //------------------------------------------------------------------------------------------------------------------------
554 // Synchronization
555 //
556 // The interpreter's synchronization code is factored out so that it can
557 // be shared by method invocation and synchronized blocks.
558 //%note synchronization_3
559
560 static void trace_locking(Handle& h_locking_obj, bool is_locking) {
561 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking);
562 }
563
564
565 //%note monitor_1
566 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
567 #ifdef ASSERT
568 thread->last_frame().interpreter_frame_verify_monitor(elem);
569 #endif
570 if (PrintBiasedLockingStatistics) {
571 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
572 }
573 Handle h_obj(thread, elem->obj());
574 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
575 "must be NULL or an object");
576 if (UseBiasedLocking) {
577 // Retry fast entry if bias is revoked to avoid unnecessary inflation
578 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
579 } else {
580 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
581 }
582 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
583 "must be NULL or an object");
584 #ifdef ASSERT
585 thread->last_frame().interpreter_frame_verify_monitor(elem);
586 #endif
587 IRT_END
588
589
590 //%note monitor_1
591 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
592 #ifdef ASSERT
593 thread->last_frame().interpreter_frame_verify_monitor(elem);
594 #endif
595 Handle h_obj(thread, elem->obj());
596 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
597 "must be NULL or an object");
598 if (elem == NULL || h_obj()->is_unlocked()) {
599 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
600 }
601 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
602 // Free entry. This must be done here, since a pending exception might be installed on
603 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
604 elem->set_obj(NULL);
605 #ifdef ASSERT
606 thread->last_frame().interpreter_frame_verify_monitor(elem);
607 #endif
608 IRT_END
609
610
611 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
612 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
613 IRT_END
614
615
616 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
617 // Returns an illegal exception to install into the current thread. The
618 // pending_exception flag is cleared so normal exception handling does not
619 // trigger. Any current installed exception will be overwritten. This
620 // method will be called during an exception unwind.
621
622 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
623 Handle exception(thread, thread->vm_result());
624 assert(exception() != NULL, "vm result should be set");
625 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
626 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
627 exception = get_preinitialized_exception(
628 SystemDictionary::IllegalMonitorStateException_klass(),
629 CATCH);
630 }
631 thread->set_vm_result(exception());
632 IRT_END
633
634
635 //------------------------------------------------------------------------------------------------------------------------
636 // Invokes
637
638 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
639 return method->orig_bytecode_at(method->bci_from(bcp));
640 IRT_END
641
642 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
643 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
644 IRT_END
645
646 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
647 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
648 IRT_END
649
650 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) {
651 // extract receiver from the outgoing argument list if necessary
652 Handle receiver(thread, NULL);
653 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
654 ResourceMark rm(thread);
655 methodHandle m (thread, method(thread));
656 Bytecode_invoke call(m, bci(thread));
657 Symbol* signature = call.signature();
658 receiver = Handle(thread,
659 thread->last_frame().interpreter_callee_receiver(signature));
660 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
661 "sanity check");
662 assert(receiver.is_null() ||
663 !Universe::heap()->is_in_reserved(receiver->klass()),
664 "sanity check");
665 }
666
667 // resolve method
668 CallInfo info;
669 constantPoolHandle pool(thread, method(thread)->constants());
670
671 {
672 JvmtiHideSingleStepping jhss(thread);
673 LinkResolver::resolve_invoke(info, receiver, pool,
674 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
675 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
676 int retry_count = 0;
677 while (info.resolved_method()->is_old()) {
678 // It is very unlikely that method is redefined more than 100 times
679 // in the middle of resolve. If it is looping here more than 100 times
680 // means then there could be a bug here.
681 guarantee((retry_count++ < 100),
682 "Could not resolve to latest version of redefined method");
683 // method is redefined in the middle of resolve so re-try.
684 LinkResolver::resolve_invoke(info, receiver, pool,
685 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
686 }
687 }
688 } // end JvmtiHideSingleStepping
689
690 // check if link resolution caused cpCache to be updated
691 if (already_resolved(thread)) return;
692
693 if (bytecode == Bytecodes::_invokeinterface) {
694
695 if (TraceItables && Verbose) {
696 ResourceMark rm(thread);
697 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
698 }
699 if (info.resolved_method()->method_holder() ==
700 SystemDictionary::Object_klass()) {
701 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
702 // (see also cpCacheOop.cpp for details)
703 methodHandle rm = info.resolved_method();
704 assert(rm->is_final() || info.has_vtable_index(),
705 "should have been set already");
706 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index());
707 } else {
708 // Setup itable entry
709 int index = klassItable::compute_itable_index(info.resolved_method()());
710 cache_entry(thread)->set_interface_call(info.resolved_method(), index);
711 }
712 } else {
713 cache_entry(thread)->set_method(
714 bytecode,
715 info.resolved_method(),
716 info.vtable_index());
717 }
718 }
719 IRT_END
720
721
722 // First time execution: Resolve symbols, create a permanent MethodType object.
723 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) {
724 assert(EnableInvokeDynamic, "");
725 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
726
727 // resolve method
728 CallInfo info;
729 constantPoolHandle pool(thread, method(thread)->constants());
730
731 {
732 JvmtiHideSingleStepping jhss(thread);
733 LinkResolver::resolve_invoke(info, Handle(), pool,
734 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
735 } // end JvmtiHideSingleStepping
736
737 cache_entry(thread)->set_method_handle(pool, info);
738 }
739 IRT_END
740
741
742 // First time execution: Resolve symbols, create a permanent CallSite object.
743 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
744 assert(EnableInvokeDynamic, "");
745 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
746
747 //TO DO: consider passing BCI to Java.
748 // int caller_bci = method(thread)->bci_from(bcp(thread));
749
750 // resolve method
751 CallInfo info;
752 constantPoolHandle pool(thread, method(thread)->constants());
753 int index = get_index_u4(thread, bytecode);
754 {
755 JvmtiHideSingleStepping jhss(thread);
756 LinkResolver::resolve_invoke(info, Handle(), pool,
757 index, bytecode, CHECK);
758 } // end JvmtiHideSingleStepping
759
760 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
761 cp_cache_entry->set_dynamic_call(pool, info);
762 }
763 IRT_END
764
765
766 //------------------------------------------------------------------------------------------------------------------------
767 // Miscellaneous
768
769
770 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
771 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
772 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
773 if (branch_bcp != NULL && nm != NULL) {
774 // This was a successful request for an OSR nmethod. Because
775 // frequency_counter_overflow_inner ends with a safepoint check,
776 // nm could have been unloaded so look it up again. It's unsafe
777 // to examine nm directly since it might have been freed and used
778 // for something else.
779 frame fr = thread->last_frame();
780 Method* method = fr.interpreter_frame_method();
781 int bci = method->bci_from(fr.interpreter_frame_bcp());
782 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
783 }
784 #ifndef PRODUCT
785 if (TraceOnStackReplacement) {
786 if (nm != NULL) {
787 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
788 nm->print();
789 }
790 }
791 #endif
792 return nm;
793 }
794
795 IRT_ENTRY(nmethod*,
796 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
797 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
798 // flag, in case this method triggers classloading which will call into Java.
799 UnlockFlagSaver fs(thread);
800
801 frame fr = thread->last_frame();
802 assert(fr.is_interpreted_frame(), "must come from interpreter");
803 methodHandle method(thread, fr.interpreter_frame_method());
804 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
805 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
806
807 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
808 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
809 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
810
811 if (osr_nm != NULL) {
812 // We may need to do on-stack replacement which requires that no
813 // monitors in the activation are biased because their
814 // BasicObjectLocks will need to migrate during OSR. Force
815 // unbiasing of all monitors in the activation now (even though
816 // the OSR nmethod might be invalidated) because we don't have a
817 // safepoint opportunity later once the migration begins.
818 if (UseBiasedLocking) {
819 ResourceMark rm;
820 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
821 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
822 kptr < fr.interpreter_frame_monitor_begin();
823 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
824 if( kptr->obj() != NULL ) {
825 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
826 }
827 }
828 BiasedLocking::revoke(objects_to_revoke);
829 }
830 }
831 return osr_nm;
832 IRT_END
833
834 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
835 assert(ProfileInterpreter, "must be profiling interpreter");
836 int bci = method->bci_from(cur_bcp);
837 MethodData* mdo = method->method_data();
838 if (mdo == NULL) return 0;
839 return mdo->bci_to_di(bci);
840 IRT_END
841
842 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
843 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
844 // flag, in case this method triggers classloading which will call into Java.
845 UnlockFlagSaver fs(thread);
846
847 assert(ProfileInterpreter, "must be profiling interpreter");
848 frame fr = thread->last_frame();
849 assert(fr.is_interpreted_frame(), "must come from interpreter");
850 methodHandle method(thread, fr.interpreter_frame_method());
851 Method::build_interpreter_method_data(method, THREAD);
852 if (HAS_PENDING_EXCEPTION) {
853 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
854 CLEAR_PENDING_EXCEPTION;
855 // and fall through...
856 }
857 IRT_END
858
859
860 #ifdef ASSERT
861 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
862 assert(ProfileInterpreter, "must be profiling interpreter");
863
864 MethodData* mdo = method->method_data();
865 assert(mdo != NULL, "must not be null");
866
867 int bci = method->bci_from(bcp);
868
869 address mdp2 = mdo->bci_to_dp(bci);
870 if (mdp != mdp2) {
871 ResourceMark rm;
872 ResetNoHandleMark rnm; // In a LEAF entry.
873 HandleMark hm;
874 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
875 int current_di = mdo->dp_to_di(mdp);
876 int expected_di = mdo->dp_to_di(mdp2);
877 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
878 int expected_approx_bci = mdo->data_at(expected_di)->bci();
879 int approx_bci = -1;
880 if (current_di >= 0) {
881 approx_bci = mdo->data_at(current_di)->bci();
882 }
883 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
884 mdo->print_on(tty);
885 method->print_codes();
886 }
887 assert(mdp == mdp2, "wrong mdp");
888 IRT_END
889 #endif // ASSERT
890
891 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
892 assert(ProfileInterpreter, "must be profiling interpreter");
893 ResourceMark rm(thread);
894 HandleMark hm(thread);
895 frame fr = thread->last_frame();
896 assert(fr.is_interpreted_frame(), "must come from interpreter");
897 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
898
899 // Grab a lock to ensure atomic access to setting the return bci and
900 // the displacement. This can block and GC, invalidating all naked oops.
901 MutexLocker ml(RetData_lock);
902
903 // ProfileData is essentially a wrapper around a derived oop, so we
904 // need to take the lock before making any ProfileData structures.
905 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
906 RetData* rdata = data->as_RetData();
907 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
908 fr.interpreter_frame_set_mdp(new_mdp);
909 IRT_END
910
911
912 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
913 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
914 // stack traversal automatically takes care of preserving arguments for invoke, so
915 // this is no longer needed.
916
917 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
918 // if this is called during a safepoint
919
920 if (JvmtiExport::should_post_single_step()) {
921 // We are called during regular safepoints and when the VM is
922 // single stepping. If any thread is marked for single stepping,
923 // then we may have JVMTI work to do.
924 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
925 }
926 IRT_END
927
928 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
929 ConstantPoolCacheEntry *cp_entry))
930
931 // check the access_flags for the field in the klass
932
933 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
934 int index = cp_entry->field_index();
935 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
936
937 switch(cp_entry->flag_state()) {
938 case btos: // fall through
939 case ctos: // fall through
940 case stos: // fall through
941 case itos: // fall through
942 case ftos: // fall through
943 case ltos: // fall through
944 case dtos: // fall through
945 case atos: break;
946 default: ShouldNotReachHere(); return;
947 }
948 bool is_static = (obj == NULL);
949 HandleMark hm(thread);
950
951 Handle h_obj;
952 if (!is_static) {
953 // non-static field accessors have an object, but we need a handle
954 h_obj = Handle(thread, obj);
955 }
956 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
957 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
958 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
959 IRT_END
960
961 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
962 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
963
964 Klass* k = (Klass*)cp_entry->f1_as_klass();
965
966 // check the access_flags for the field in the klass
967 InstanceKlass* ik = InstanceKlass::cast(k);
968 int index = cp_entry->field_index();
969 // bail out if field modifications are not watched
970 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
971
972 char sig_type = '\0';
973
974 switch(cp_entry->flag_state()) {
975 case btos: sig_type = 'Z'; break;
976 case ctos: sig_type = 'C'; break;
977 case stos: sig_type = 'S'; break;
978 case itos: sig_type = 'I'; break;
979 case ftos: sig_type = 'F'; break;
980 case atos: sig_type = 'L'; break;
981 case ltos: sig_type = 'J'; break;
982 case dtos: sig_type = 'D'; break;
983 default: ShouldNotReachHere(); return;
984 }
985 bool is_static = (obj == NULL);
986
987 HandleMark hm(thread);
988 instanceKlassHandle h_klass(thread, k);
989 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
990 jvalue fvalue;
991 #ifdef _LP64
992 fvalue = *value;
993 #else
994 // Long/double values are stored unaligned and also noncontiguously with
995 // tagged stacks. We can't just do a simple assignment even in the non-
996 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
997 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
998 // We assume that the two halves of longs/doubles are stored in interpreter
999 // stack slots in platform-endian order.
1000 jlong_accessor u;
1001 jint* newval = (jint*)value;
1002 u.words[0] = newval[0];
1003 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1004 fvalue.j = u.long_value;
1005 #endif // _LP64
1006
1007 Handle h_obj;
1008 if (!is_static) {
1009 // non-static field accessors have an object, but we need a handle
1010 h_obj = Handle(thread, obj);
1011 }
1012
1013 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1014 fid, sig_type, &fvalue);
1015 IRT_END
1016
1017 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1018 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1019 IRT_END
1020
1021
1022 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1023 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1024 IRT_END
1025
1026 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1027 {
1028 return (Interpreter::contains(pc) ? 1 : 0);
1029 }
1030 IRT_END
1031
1032
1033 // Implementation of SignatureHandlerLibrary
1034
1035 address SignatureHandlerLibrary::set_handler_blob() {
1036 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1037 if (handler_blob == NULL) {
1038 return NULL;
1039 }
1040 address handler = handler_blob->code_begin();
1041 _handler_blob = handler_blob;
1042 _handler = handler;
1043 return handler;
1044 }
1045
1046 void SignatureHandlerLibrary::initialize() {
1047 if (_fingerprints != NULL) {
1048 return;
1049 }
1050 if (set_handler_blob() == NULL) {
1051 vm_exit_out_of_memory(blob_size, "native signature handlers");
1052 }
1053
1054 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1055 SignatureHandlerLibrary::buffer_size);
1056 _buffer = bb->code_begin();
1057
1058 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1059 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1060 }
1061
1062 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1063 address handler = _handler;
1064 int insts_size = buffer->pure_insts_size();
1065 if (handler + insts_size > _handler_blob->code_end()) {
1066 // get a new handler blob
1067 handler = set_handler_blob();
1068 }
1069 if (handler != NULL) {
1070 memcpy(handler, buffer->insts_begin(), insts_size);
1071 pd_set_handler(handler);
1072 ICache::invalidate_range(handler, insts_size);
1073 _handler = handler + insts_size;
1074 }
1075 return handler;
1076 }
1077
1078 void SignatureHandlerLibrary::add(methodHandle method) {
1079 if (method->signature_handler() == NULL) {
1080 // use slow signature handler if we can't do better
1081 int handler_index = -1;
1082 // check if we can use customized (fast) signature handler
1083 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1084 // use customized signature handler
1085 MutexLocker mu(SignatureHandlerLibrary_lock);
1086 // make sure data structure is initialized
1087 initialize();
1088 // lookup method signature's fingerprint
1089 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1090 handler_index = _fingerprints->find(fingerprint);
1091 // create handler if necessary
1092 if (handler_index < 0) {
1093 ResourceMark rm;
1094 ptrdiff_t align_offset = (address)
1095 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1096 CodeBuffer buffer((address)(_buffer + align_offset),
1097 SignatureHandlerLibrary::buffer_size - align_offset);
1098 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1099 // copy into code heap
1100 address handler = set_handler(&buffer);
1101 if (handler == NULL) {
1102 // use slow signature handler
1103 } else {
1104 // debugging suppport
1105 if (PrintSignatureHandlers) {
1106 tty->cr();
1107 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1108 _handlers->length(),
1109 (method->is_static() ? "static" : "receiver"),
1110 method->name_and_sig_as_C_string(),
1111 fingerprint,
1112 buffer.insts_size());
1113 Disassembler::decode(handler, handler + buffer.insts_size());
1114 #ifndef PRODUCT
1115 tty->print_cr(" --- associated result handler ---");
1116 address rh_begin = Interpreter::result_handler(method()->result_type());
1117 address rh_end = rh_begin;
1118 while (*(int*)rh_end != 0) {
1119 rh_end += sizeof(int);
1120 }
1121 Disassembler::decode(rh_begin, rh_end);
1122 #endif
1123 }
1124 // add handler to library
1125 _fingerprints->append(fingerprint);
1126 _handlers->append(handler);
1127 // set handler index
1128 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1129 handler_index = _fingerprints->length() - 1;
1130 }
1131 }
1132 // Set handler under SignatureHandlerLibrary_lock
1133 if (handler_index < 0) {
1134 // use generic signature handler
1135 method->set_signature_handler(Interpreter::slow_signature_handler());
1136 } else {
1137 // set handler
1138 method->set_signature_handler(_handlers->at(handler_index));
1139 }
1140 } else {
1141 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1142 // use generic signature handler
1143 method->set_signature_handler(Interpreter::slow_signature_handler());
1144 }
1145 }
1146 #ifdef ASSERT
1147 int handler_index = -1;
1148 int fingerprint_index = -2;
1149 {
1150 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1151 // in any way if accessed from multiple threads. To avoid races with another
1152 // thread which may change the arrays in the above, mutex protected block, we
1153 // have to protect this read access here with the same mutex as well!
1154 MutexLocker mu(SignatureHandlerLibrary_lock);
1155 if (_handlers != NULL) {
1156 handler_index = _handlers->find(method->signature_handler());
1157 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1158 }
1159 }
1160 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1161 handler_index == fingerprint_index, "sanity check");
1162 #endif // ASSERT
1163 }
1164
1165
1166 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1167 address SignatureHandlerLibrary::_handler = NULL;
1168 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1169 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1170 address SignatureHandlerLibrary::_buffer = NULL;
1171
1172
1173 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1174 methodHandle m(thread, method);
1175 assert(m->is_native(), "sanity check");
1176 // lookup native function entry point if it doesn't exist
1177 bool in_base_library;
1178 if (!m->has_native_function()) {
1179 NativeLookup::lookup(m, in_base_library, CHECK);
1180 }
1181 // make sure signature handler is installed
1182 SignatureHandlerLibrary::add(m);
1183 // The interpreter entry point checks the signature handler first,
1184 // before trying to fetch the native entry point and klass mirror.
1185 // We must set the signature handler last, so that multiple processors
1186 // preparing the same method will be sure to see non-null entry & mirror.
1187 IRT_END
1188
1189 #if defined(IA32) || defined(AMD64) || defined(ARM)
1190 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1191 if (src_address == dest_address) {
1192 return;
1193 }
1194 ResetNoHandleMark rnm; // In a LEAF entry.
1195 HandleMark hm;
1196 ResourceMark rm;
1197 frame fr = thread->last_frame();
1198 assert(fr.is_interpreted_frame(), "");
1199 jint bci = fr.interpreter_frame_bci();
1200 methodHandle mh(thread, fr.interpreter_frame_method());
1201 Bytecode_invoke invoke(mh, bci);
1202 ArgumentSizeComputer asc(invoke.signature());
1203 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1204 Copy::conjoint_jbytes(src_address, dest_address,
1205 size_of_arguments * Interpreter::stackElementSize);
1206 IRT_END
1207 #endif