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 "gc_interface/collectedHeap.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/interpreterRuntime.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "interpreter/templateTable.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/constantPool.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "oops/methodData.hpp"
39 #include "oops/objArrayKlass.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "oops/symbol.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "prims/nativeLookup.hpp"
44 #include "runtime/biasedLocking.hpp"
45 #include "runtime/compilationPolicy.hpp"
46 #include "runtime/deoptimization.hpp"
47 #include "runtime/fieldDescriptor.hpp"
48 #include "runtime/handles.inline.hpp"
49 #include "runtime/interfaceSupport.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/jfieldIDWorkaround.hpp"
52 #include "runtime/osThread.hpp"
53 #include "runtime/sharedRuntime.hpp"
54 #include "runtime/stubRoutines.hpp"
55 #include "runtime/synchronizer.hpp"
56 #include "runtime/threadCritical.hpp"
57 #include "utilities/events.hpp"
58 #ifdef TARGET_ARCH_x86
59 # include "vm_version_x86.hpp"
60 #endif
61 #ifdef TARGET_ARCH_sparc
62 # include "vm_version_sparc.hpp"
63 #endif
64 #ifdef TARGET_ARCH_zero
65 # include "vm_version_zero.hpp"
66 #endif
67 #ifdef TARGET_ARCH_arm
68 # include "vm_version_arm.hpp"
69 #endif
70 #ifdef TARGET_ARCH_ppc
71 # include "vm_version_ppc.hpp"
72 #endif
73 #ifdef COMPILER2
74 #include "opto/runtime.hpp"
75 #endif
76
77 class UnlockFlagSaver {
78 private:
79 JavaThread* _thread;
80 bool _do_not_unlock;
81 public:
82 UnlockFlagSaver(JavaThread* t) {
83 _thread = t;
84 _do_not_unlock = t->do_not_unlock_if_synchronized();
85 t->set_do_not_unlock_if_synchronized(false);
86 }
87 ~UnlockFlagSaver() {
88 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
89 }
90 };
91
92 //------------------------------------------------------------------------------------------------------------------------
93 // State accessors
94
95 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
96 last_frame(thread).interpreter_frame_set_bcp(bcp);
97 if (ProfileInterpreter) {
98 // ProfileTraps uses MDOs independently of ProfileInterpreter.
99 // That is why we must check both ProfileInterpreter and mdo != NULL.
100 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
101 if (mdo != NULL) {
102 NEEDS_CLEANUP;
103 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
104 }
105 }
106 }
107
108 //------------------------------------------------------------------------------------------------------------------------
109 // Constants
110
111
112 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
113 // access constant pool
114 ConstantPool* pool = method(thread)->constants();
115 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
116 constantTag tag = pool->tag_at(index);
117
118 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
119 Klass* klass = pool->klass_at(index, CHECK);
120 oop java_class = klass->java_mirror();
121 thread->set_vm_result(java_class);
122 IRT_END
123
124 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
125 assert(bytecode == Bytecodes::_fast_aldc ||
126 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
127 ResourceMark rm(thread);
128 methodHandle m (thread, method(thread));
129 Bytecode_loadconstant ldc(m, bci(thread));
130 oop result = ldc.resolve_constant(CHECK);
131 #ifdef ASSERT
132 {
133 // The bytecode wrappers aren't GC-safe so construct a new one
134 Bytecode_loadconstant ldc2(m, bci(thread));
135 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
136 assert(result == coop, "expected result for assembly code");
137 }
138 #endif
139 thread->set_vm_result(result);
140 }
141 IRT_END
142
143
144 //------------------------------------------------------------------------------------------------------------------------
145 // Allocation
146
147 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
148 Klass* k_oop = pool->klass_at(index, CHECK);
149 instanceKlassHandle klass (THREAD, k_oop);
150
151 // Make sure we are not instantiating an abstract klass
152 klass->check_valid_for_instantiation(true, CHECK);
153
154 // Make sure klass is initialized
155 klass->initialize(CHECK);
156
157 // At this point the class may not be fully initialized
158 // because of recursive initialization. If it is fully
159 // initialized & has_finalized is not set, we rewrite
160 // it into its fast version (Note: no locking is needed
161 // here since this is an atomic byte write and can be
162 // done more than once).
163 //
164 // Note: In case of classes with has_finalized we don't
165 // rewrite since that saves us an extra check in
166 // the fast version which then would call the
167 // slow version anyway (and do a call back into
168 // Java).
169 // If we have a breakpoint, then we don't rewrite
170 // because the _breakpoint bytecode would be lost.
171 oop obj = klass->allocate_instance(CHECK);
172 thread->set_vm_result(obj);
173 IRT_END
174
175
176 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
177 oop obj = oopFactory::new_typeArray(type, size, CHECK);
178 thread->set_vm_result(obj);
179 IRT_END
180
181
182 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
183 // Note: no oopHandle for pool & klass needed since they are not used
184 // anymore after new_objArray() and no GC can happen before.
185 // (This may have to change if this code changes!)
186 Klass* klass = pool->klass_at(index, CHECK);
187 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
188 thread->set_vm_result(obj);
189 IRT_END
190
191
192 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
193 // We may want to pass in more arguments - could make this slightly faster
194 ConstantPool* constants = method(thread)->constants();
195 int i = get_index_u2(thread, Bytecodes::_multianewarray);
196 Klass* klass = constants->klass_at(i, CHECK);
197 int nof_dims = number_of_dimensions(thread);
198 assert(klass->is_klass(), "not a class");
199 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
200
201 // We must create an array of jints to pass to multi_allocate.
202 ResourceMark rm(thread);
203 const int small_dims = 10;
204 jint dim_array[small_dims];
205 jint *dims = &dim_array[0];
206 if (nof_dims > small_dims) {
207 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
208 }
209 for (int index = 0; index < nof_dims; index++) {
210 // offset from first_size_address is addressed as local[index]
211 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
212 dims[index] = first_size_address[n];
213 }
214 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
215 thread->set_vm_result(obj);
216 IRT_END
217
218
219 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
220 assert(obj->is_oop(), "must be a valid oop");
221 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
222 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
223 IRT_END
224
225
226 // Quicken instance-of and check-cast bytecodes
227 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
228 // Force resolving; quicken the bytecode
229 int which = get_index_u2(thread, Bytecodes::_checkcast);
230 ConstantPool* cpool = method(thread)->constants();
231 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
232 // program we might have seen an unquick'd bytecode in the interpreter but have another
233 // thread quicken the bytecode before we get here.
234 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
235 Klass* klass = cpool->klass_at(which, CHECK);
236 thread->set_vm_result_2(klass);
237 IRT_END
238
239
240 //------------------------------------------------------------------------------------------------------------------------
241 // Exceptions
242
243 // Assume the compiler is (or will be) interested in this event.
244 // If necessary, create an MDO to hold the information, and record it.
245 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
246 assert(ProfileTraps, "call me only if profiling");
247 methodHandle trap_method(thread, method(thread));
248
249 if (trap_method.not_null()) {
250 MethodData* trap_mdo = trap_method->method_data();
251 if (trap_mdo == NULL) {
252 Method::build_interpreter_method_data(trap_method, THREAD);
253 if (HAS_PENDING_EXCEPTION) {
254 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
255 CLEAR_PENDING_EXCEPTION;
256 }
257 trap_mdo = trap_method->method_data();
258 // and fall through...
259 }
260 if (trap_mdo != NULL) {
261 // Update per-method count of trap events. The interpreter
262 // is updating the MDO to simulate the effect of compiler traps.
263 int trap_bci = trap_method->bci_from(bcp(thread));
264 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
265 }
266 }
267 }
268
269 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
270 // get klass
271 InstanceKlass* klass = InstanceKlass::cast(k);
272 assert(klass->is_initialized(),
273 "this klass should have been initialized during VM initialization");
274 // create instance - do not call constructor since we may have no
275 // (java) stack space left (should assert constructor is empty)
276 Handle exception;
277 oop exception_oop = klass->allocate_instance(CHECK_(exception));
278 exception = Handle(THREAD, exception_oop);
279 if (StackTraceInThrowable) {
280 java_lang_Throwable::fill_in_stack_trace(exception);
281 }
282 return exception;
283 }
284
285 // Special handling for stack overflow: since we don't have any (java) stack
286 // space left we use the pre-allocated & pre-initialized StackOverflowError
287 // klass to create an stack overflow error instance. We do not call its
288 // constructor for the same reason (it is empty, anyway).
289 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
290 Handle exception = get_preinitialized_exception(
291 SystemDictionary::StackOverflowError_klass(),
292 CHECK);
293 THROW_HANDLE(exception);
294 IRT_END
295
296
297 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
298 // lookup exception klass
299 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
300 if (ProfileTraps) {
301 if (s == vmSymbols::java_lang_ArithmeticException()) {
302 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
303 } else if (s == vmSymbols::java_lang_NullPointerException()) {
304 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
305 }
306 }
307 // create exception
308 Handle exception = Exceptions::new_exception(thread, s, message);
309 thread->set_vm_result(exception());
310 IRT_END
311
312
313 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
314 ResourceMark rm(thread);
315 const char* klass_name = Klass::cast(obj->klass())->external_name();
316 // lookup exception klass
317 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
318 if (ProfileTraps) {
319 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
320 }
321 // create exception, with klass name as detail message
322 Handle exception = Exceptions::new_exception(thread, s, klass_name);
323 thread->set_vm_result(exception());
324 IRT_END
325
326
327 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
328 char message[jintAsStringSize];
329 // lookup exception klass
330 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
331 if (ProfileTraps) {
332 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
333 }
334 // create exception
335 sprintf(message, "%d", index);
336 THROW_MSG(s, message);
337 IRT_END
338
339 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
340 JavaThread* thread, oopDesc* obj))
341
342 ResourceMark rm(thread);
343 char* message = SharedRuntime::generate_class_cast_message(
344 thread, Klass::cast(obj->klass())->external_name());
345
346 if (ProfileTraps) {
347 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
348 }
349
350 // create exception
351 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
352 IRT_END
353
354 // exception_handler_for_exception(...) returns the continuation address,
355 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
356 // The exception oop is returned to make sure it is preserved over GC (it
357 // is only on the stack if the exception was thrown explicitly via athrow).
358 // During this operation, the expression stack contains the values for the
359 // bci where the exception happened. If the exception was propagated back
360 // from a call, the expression stack contains the values for the bci at the
361 // invoke w/o arguments (i.e., as if one were inside the call).
362 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
363
364 Handle h_exception(thread, exception);
365 methodHandle h_method (thread, method(thread));
366 constantPoolHandle h_constants(thread, h_method->constants());
367 bool should_repeat;
368 int handler_bci;
369 int current_bci = bci(thread);
370
371 // Need to do this check first since when _do_not_unlock_if_synchronized
372 // is set, we don't want to trigger any classloading which may make calls
373 // into java, or surprisingly find a matching exception handler for bci 0
374 // since at this moment the method hasn't been "officially" entered yet.
375 if (thread->do_not_unlock_if_synchronized()) {
376 ResourceMark rm;
377 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
378 thread->set_vm_result(exception);
379 #ifdef CC_INTERP
380 return (address) -1;
381 #else
382 return Interpreter::remove_activation_entry();
383 #endif
384 }
385
386 do {
387 should_repeat = false;
388
389 // assertions
390 #ifdef ASSERT
391 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
392 assert(h_exception->is_oop(), "just checking");
393 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
394 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
395 if (ExitVMOnVerifyError) vm_exit(-1);
396 ShouldNotReachHere();
397 }
398 #endif
399
400 // tracing
401 if (TraceExceptions) {
402 ttyLocker ttyl;
403 ResourceMark rm(thread);
404 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception());
405 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
406 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
407 }
408 // Don't go paging in something which won't be used.
409 // else if (extable->length() == 0) {
410 // // disabled for now - interpreter is not using shortcut yet
411 // // (shortcut is not to call runtime if we have no exception handlers)
412 // // warning("performance bug: should not call runtime if method has no exception handlers");
413 // }
414 // for AbortVMOnException flag
415 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
416
417 // exception handler lookup
418 KlassHandle h_klass(THREAD, h_exception->klass());
419 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD);
420 if (HAS_PENDING_EXCEPTION) {
421 // We threw an exception while trying to find the exception handler.
422 // Transfer the new exception to the exception handle which will
423 // be set into thread local storage, and do another lookup for an
424 // exception handler for this exception, this time starting at the
425 // BCI of the exception handler which caused the exception to be
426 // thrown (bug 4307310).
427 h_exception = Handle(THREAD, PENDING_EXCEPTION);
428 CLEAR_PENDING_EXCEPTION;
429 if (handler_bci >= 0) {
430 current_bci = handler_bci;
431 should_repeat = true;
432 }
433 }
434 } while (should_repeat == true);
435
436 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
437 // time throw or a stack unwinding throw and accordingly notify the debugger
438 if (JvmtiExport::can_post_on_exceptions()) {
439 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
440 }
441
442 #ifdef CC_INTERP
443 address continuation = (address)(intptr_t) handler_bci;
444 #else
445 address continuation = NULL;
446 #endif
447 address handler_pc = NULL;
448 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
449 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
450 // handler in this method, or (b) after a stack overflow there is not yet
451 // enough stack space available to reprotect the stack.
452 #ifndef CC_INTERP
453 continuation = Interpreter::remove_activation_entry();
454 #endif
455 // Count this for compilation purposes
456 h_method->interpreter_throwout_increment();
457 } else {
458 // handler in this method => change bci/bcp to handler bci/bcp and continue there
459 handler_pc = h_method->code_base() + handler_bci;
460 #ifndef CC_INTERP
461 set_bcp_and_mdp(handler_pc, thread);
462 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
463 #endif
464 }
465 // notify debugger of an exception catch
466 // (this is good for exceptions caught in native methods as well)
467 if (JvmtiExport::can_post_on_exceptions()) {
468 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
469 }
470
471 thread->set_vm_result(h_exception());
472 return continuation;
473 IRT_END
474
475
476 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
477 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
478 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
479 IRT_END
480
481
482 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
483 THROW(vmSymbols::java_lang_AbstractMethodError());
484 IRT_END
485
486
487 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
488 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
489 IRT_END
490
491
492 //------------------------------------------------------------------------------------------------------------------------
493 // Fields
494 //
495
496 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
497 // resolve field
498 FieldAccessInfo info;
499 constantPoolHandle pool(thread, method(thread)->constants());
500 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic);
501 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
502
503 {
504 JvmtiHideSingleStepping jhss(thread);
505 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode),
506 bytecode, false, CHECK);
507 } // end JvmtiHideSingleStepping
508
509 // check if link resolution caused cpCache to be updated
510 if (already_resolved(thread)) return;
511
512 // compute auxiliary field attributes
513 TosState state = as_TosState(info.field_type());
514
515 // We need to delay resolving put instructions on final fields
516 // until we actually invoke one. This is required so we throw
517 // exceptions at the correct place. If we do not resolve completely
518 // in the current pass, leaving the put_code set to zero will
519 // cause the next put instruction to reresolve.
520 Bytecodes::Code put_code = (Bytecodes::Code)0;
521
522 // We also need to delay resolving getstatic instructions until the
523 // class is intitialized. This is required so that access to the static
524 // field will call the initialization function every time until the class
525 // is completely initialized ala. in 2.17.5 in JVM Specification.
526 InstanceKlass *klass = InstanceKlass::cast(info.klass()());
527 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
528 !klass->is_initialized());
529 Bytecodes::Code get_code = (Bytecodes::Code)0;
530
531 if (!uninitialized_static) {
532 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
533 if (is_put || !info.access_flags().is_final()) {
534 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
535 }
536 }
537
538 cache_entry(thread)->set_field(
539 get_code,
540 put_code,
541 info.klass(),
542 info.field_index(),
543 info.field_offset(),
544 state,
545 info.access_flags().is_final(),
546 info.access_flags().is_volatile(),
547 pool->pool_holder()
548 );
549 IRT_END
550
551
552 //------------------------------------------------------------------------------------------------------------------------
553 // Synchronization
554 //
555 // The interpreter's synchronization code is factored out so that it can
556 // be shared by method invocation and synchronized blocks.
557 //%note synchronization_3
558
559 static void trace_locking(Handle& h_locking_obj, bool is_locking) {
560 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking);
561 }
562
563
564 //%note monitor_1
565 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
566 #ifdef ASSERT
567 thread->last_frame().interpreter_frame_verify_monitor(elem);
568 #endif
569 if (PrintBiasedLockingStatistics) {
570 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
571 }
572 Handle h_obj(thread, elem->obj());
573 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
574 "must be NULL or an object");
575 if (UseBiasedLocking) {
576 // Retry fast entry if bias is revoked to avoid unnecessary inflation
577 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
578 } else {
579 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
580 }
581 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
582 "must be NULL or an object");
583 #ifdef ASSERT
584 thread->last_frame().interpreter_frame_verify_monitor(elem);
585 #endif
586 IRT_END
587
588
589 //%note monitor_1
590 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
591 #ifdef ASSERT
592 thread->last_frame().interpreter_frame_verify_monitor(elem);
593 #endif
594 Handle h_obj(thread, elem->obj());
595 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
596 "must be NULL or an object");
597 if (elem == NULL || h_obj()->is_unlocked()) {
598 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
599 }
600 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
601 // Free entry. This must be done here, since a pending exception might be installed on
602 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
603 elem->set_obj(NULL);
604 #ifdef ASSERT
605 thread->last_frame().interpreter_frame_verify_monitor(elem);
606 #endif
607 IRT_END
608
609
610 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
611 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
612 IRT_END
613
614
615 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
616 // Returns an illegal exception to install into the current thread. The
617 // pending_exception flag is cleared so normal exception handling does not
618 // trigger. Any current installed exception will be overwritten. This
619 // method will be called during an exception unwind.
620
621 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
622 Handle exception(thread, thread->vm_result());
623 assert(exception() != NULL, "vm result should be set");
624 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
625 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
626 exception = get_preinitialized_exception(
627 SystemDictionary::IllegalMonitorStateException_klass(),
628 CATCH);
629 }
630 thread->set_vm_result(exception());
631 IRT_END
632
633
634 //------------------------------------------------------------------------------------------------------------------------
635 // Invokes
636
637 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
638 return method->orig_bytecode_at(method->bci_from(bcp));
639 IRT_END
640
641 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
642 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
643 IRT_END
644
645 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
646 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
647 IRT_END
648
649 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) {
650 // extract receiver from the outgoing argument list if necessary
651 Handle receiver(thread, NULL);
652 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
653 ResourceMark rm(thread);
654 methodHandle m (thread, method(thread));
655 Bytecode_invoke call(m, bci(thread));
656 Symbol* signature = call.signature();
657 receiver = Handle(thread,
658 thread->last_frame().interpreter_callee_receiver(signature));
659 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
660 "sanity check");
661 assert(receiver.is_null() ||
662 !Universe::heap()->is_in_reserved(receiver->klass()),
663 "sanity check");
664 }
665
666 // resolve method
667 CallInfo info;
668 constantPoolHandle pool(thread, method(thread)->constants());
669
670 {
671 JvmtiHideSingleStepping jhss(thread);
672 LinkResolver::resolve_invoke(info, receiver, pool,
673 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
674 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
675 int retry_count = 0;
676 while (info.resolved_method()->is_old()) {
677 // It is very unlikely that method is redefined more than 100 times
678 // in the middle of resolve. If it is looping here more than 100 times
679 // means then there could be a bug here.
680 guarantee((retry_count++ < 100),
681 "Could not resolve to latest version of redefined method");
682 // method is redefined in the middle of resolve so re-try.
683 LinkResolver::resolve_invoke(info, receiver, pool,
684 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
685 }
686 }
687 } // end JvmtiHideSingleStepping
688
689 // check if link resolution caused cpCache to be updated
690 if (already_resolved(thread)) return;
691
692 if (bytecode == Bytecodes::_invokeinterface) {
693
694 if (TraceItables && Verbose) {
695 ResourceMark rm(thread);
696 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
697 }
698 if (info.resolved_method()->method_holder() ==
699 SystemDictionary::Object_klass()) {
700 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
701 // (see also cpCacheOop.cpp for details)
702 methodHandle rm = info.resolved_method();
703 assert(rm->is_final() || info.has_vtable_index(),
704 "should have been set already");
705 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index());
706 } else {
707 // Setup itable entry
708 int index = klassItable::compute_itable_index(info.resolved_method()());
709 cache_entry(thread)->set_interface_call(info.resolved_method(), index);
710 }
711 } else {
712 cache_entry(thread)->set_method(
713 bytecode,
714 info.resolved_method(),
715 info.vtable_index());
716 }
717 }
718 IRT_END
719
720
721 // First time execution: Resolve symbols, create a permanent MethodType object.
722 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) {
723 assert(EnableInvokeDynamic, "");
724 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
725
726 // resolve method
727 CallInfo info;
728 constantPoolHandle pool(thread, method(thread)->constants());
729
730 {
731 JvmtiHideSingleStepping jhss(thread);
732 LinkResolver::resolve_invoke(info, Handle(), pool,
733 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
734 } // end JvmtiHideSingleStepping
735
736 cache_entry(thread)->set_method_handle(
737 pool,
738 info.resolved_method(),
739 info.resolved_appendix(),
740 pool->resolved_references());
741 }
742 IRT_END
743
744
745 // First time execution: Resolve symbols, create a permanent CallSite object.
746 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
747 assert(EnableInvokeDynamic, "");
748 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
749
750 //TO DO: consider passing BCI to Java.
751 // int caller_bci = method(thread)->bci_from(bcp(thread));
752
753 // resolve method
754 CallInfo info;
755 constantPoolHandle pool(thread, method(thread)->constants());
756 int index = get_index_u4(thread, bytecode);
757 {
758 JvmtiHideSingleStepping jhss(thread);
759 LinkResolver::resolve_invoke(info, Handle(), pool,
760 index, bytecode, CHECK);
761 } // end JvmtiHideSingleStepping
762
763 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
764 cp_cache_entry->set_dynamic_call(
765 pool,
766 info.resolved_method(),
767 info.resolved_appendix(),
768 pool->resolved_references());
769 }
770 IRT_END
771
772
773 //------------------------------------------------------------------------------------------------------------------------
774 // Miscellaneous
775
776
777 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
778 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
779 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
780 if (branch_bcp != NULL && nm != NULL) {
781 // This was a successful request for an OSR nmethod. Because
782 // frequency_counter_overflow_inner ends with a safepoint check,
783 // nm could have been unloaded so look it up again. It's unsafe
784 // to examine nm directly since it might have been freed and used
785 // for something else.
786 frame fr = thread->last_frame();
787 Method* method = fr.interpreter_frame_method();
788 int bci = method->bci_from(fr.interpreter_frame_bcp());
789 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
790 }
791 #ifndef PRODUCT
792 if (TraceOnStackReplacement) {
793 if (nm != NULL) {
794 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
795 nm->print();
796 }
797 }
798 #endif
799 return nm;
800 }
801
802 IRT_ENTRY(nmethod*,
803 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
804 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
805 // flag, in case this method triggers classloading which will call into Java.
806 UnlockFlagSaver fs(thread);
807
808 frame fr = thread->last_frame();
809 assert(fr.is_interpreted_frame(), "must come from interpreter");
810 methodHandle method(thread, fr.interpreter_frame_method());
811 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
812 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
813
814 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
815 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
816 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
817
818 if (osr_nm != NULL) {
819 // We may need to do on-stack replacement which requires that no
820 // monitors in the activation are biased because their
821 // BasicObjectLocks will need to migrate during OSR. Force
822 // unbiasing of all monitors in the activation now (even though
823 // the OSR nmethod might be invalidated) because we don't have a
824 // safepoint opportunity later once the migration begins.
825 if (UseBiasedLocking) {
826 ResourceMark rm;
827 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
828 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
829 kptr < fr.interpreter_frame_monitor_begin();
830 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
831 if( kptr->obj() != NULL ) {
832 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
833 }
834 }
835 BiasedLocking::revoke(objects_to_revoke);
836 }
837 }
838 return osr_nm;
839 IRT_END
840
841 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
842 assert(ProfileInterpreter, "must be profiling interpreter");
843 int bci = method->bci_from(cur_bcp);
844 MethodData* mdo = method->method_data();
845 if (mdo == NULL) return 0;
846 return mdo->bci_to_di(bci);
847 IRT_END
848
849 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
850 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
851 // flag, in case this method triggers classloading which will call into Java.
852 UnlockFlagSaver fs(thread);
853
854 assert(ProfileInterpreter, "must be profiling interpreter");
855 frame fr = thread->last_frame();
856 assert(fr.is_interpreted_frame(), "must come from interpreter");
857 methodHandle method(thread, fr.interpreter_frame_method());
858 Method::build_interpreter_method_data(method, THREAD);
859 if (HAS_PENDING_EXCEPTION) {
860 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
861 CLEAR_PENDING_EXCEPTION;
862 // and fall through...
863 }
864 IRT_END
865
866
867 #ifdef ASSERT
868 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
869 assert(ProfileInterpreter, "must be profiling interpreter");
870
871 MethodData* mdo = method->method_data();
872 assert(mdo != NULL, "must not be null");
873
874 int bci = method->bci_from(bcp);
875
876 address mdp2 = mdo->bci_to_dp(bci);
877 if (mdp != mdp2) {
878 ResourceMark rm;
879 ResetNoHandleMark rnm; // In a LEAF entry.
880 HandleMark hm;
881 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
882 int current_di = mdo->dp_to_di(mdp);
883 int expected_di = mdo->dp_to_di(mdp2);
884 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
885 int expected_approx_bci = mdo->data_at(expected_di)->bci();
886 int approx_bci = -1;
887 if (current_di >= 0) {
888 approx_bci = mdo->data_at(current_di)->bci();
889 }
890 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
891 mdo->print_on(tty);
892 method->print_codes();
893 }
894 assert(mdp == mdp2, "wrong mdp");
895 IRT_END
896 #endif // ASSERT
897
898 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
899 assert(ProfileInterpreter, "must be profiling interpreter");
900 ResourceMark rm(thread);
901 HandleMark hm(thread);
902 frame fr = thread->last_frame();
903 assert(fr.is_interpreted_frame(), "must come from interpreter");
904 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
905
906 // Grab a lock to ensure atomic access to setting the return bci and
907 // the displacement. This can block and GC, invalidating all naked oops.
908 MutexLocker ml(RetData_lock);
909
910 // ProfileData is essentially a wrapper around a derived oop, so we
911 // need to take the lock before making any ProfileData structures.
912 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
913 RetData* rdata = data->as_RetData();
914 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
915 fr.interpreter_frame_set_mdp(new_mdp);
916 IRT_END
917
918
919 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
920 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
921 // stack traversal automatically takes care of preserving arguments for invoke, so
922 // this is no longer needed.
923
924 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
925 // if this is called during a safepoint
926
927 if (JvmtiExport::should_post_single_step()) {
928 // We are called during regular safepoints and when the VM is
929 // single stepping. If any thread is marked for single stepping,
930 // then we may have JVMTI work to do.
931 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
932 }
933 IRT_END
934
935 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
936 ConstantPoolCacheEntry *cp_entry))
937
938 // check the access_flags for the field in the klass
939
940 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
941 int index = cp_entry->field_index();
942 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
943
944 switch(cp_entry->flag_state()) {
945 case btos: // fall through
946 case ctos: // fall through
947 case stos: // fall through
948 case itos: // fall through
949 case ftos: // fall through
950 case ltos: // fall through
951 case dtos: // fall through
952 case atos: break;
953 default: ShouldNotReachHere(); return;
954 }
955 bool is_static = (obj == NULL);
956 HandleMark hm(thread);
957
958 Handle h_obj;
959 if (!is_static) {
960 // non-static field accessors have an object, but we need a handle
961 h_obj = Handle(thread, obj);
962 }
963 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
964 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
965 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
966 IRT_END
967
968 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
969 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
970
971 Klass* k = (Klass*)cp_entry->f1_as_klass();
972
973 // check the access_flags for the field in the klass
974 InstanceKlass* ik = InstanceKlass::cast(k);
975 int index = cp_entry->field_index();
976 // bail out if field modifications are not watched
977 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
978
979 char sig_type = '\0';
980
981 switch(cp_entry->flag_state()) {
982 case btos: sig_type = 'Z'; break;
983 case ctos: sig_type = 'C'; break;
984 case stos: sig_type = 'S'; break;
985 case itos: sig_type = 'I'; break;
986 case ftos: sig_type = 'F'; break;
987 case atos: sig_type = 'L'; break;
988 case ltos: sig_type = 'J'; break;
989 case dtos: sig_type = 'D'; break;
990 default: ShouldNotReachHere(); return;
991 }
992 bool is_static = (obj == NULL);
993
994 HandleMark hm(thread);
995 instanceKlassHandle h_klass(thread, k);
996 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
997 jvalue fvalue;
998 #ifdef _LP64
999 fvalue = *value;
1000 #else
1001 // Long/double values are stored unaligned and also noncontiguously with
1002 // tagged stacks. We can't just do a simple assignment even in the non-
1003 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1004 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1005 // We assume that the two halves of longs/doubles are stored in interpreter
1006 // stack slots in platform-endian order.
1007 jlong_accessor u;
1008 jint* newval = (jint*)value;
1009 u.words[0] = newval[0];
1010 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1011 fvalue.j = u.long_value;
1012 #endif // _LP64
1013
1014 Handle h_obj;
1015 if (!is_static) {
1016 // non-static field accessors have an object, but we need a handle
1017 h_obj = Handle(thread, obj);
1018 }
1019
1020 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1021 fid, sig_type, &fvalue);
1022 IRT_END
1023
1024 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1025 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1026 IRT_END
1027
1028
1029 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1030 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1031 IRT_END
1032
1033 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1034 {
1035 return (Interpreter::contains(pc) ? 1 : 0);
1036 }
1037 IRT_END
1038
1039
1040 // Implementation of SignatureHandlerLibrary
1041
1042 address SignatureHandlerLibrary::set_handler_blob() {
1043 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1044 if (handler_blob == NULL) {
1045 return NULL;
1046 }
1047 address handler = handler_blob->code_begin();
1048 _handler_blob = handler_blob;
1049 _handler = handler;
1050 return handler;
1051 }
1052
1053 void SignatureHandlerLibrary::initialize() {
1054 if (_fingerprints != NULL) {
1055 return;
1056 }
1057 if (set_handler_blob() == NULL) {
1058 vm_exit_out_of_memory(blob_size, "native signature handlers");
1059 }
1060
1061 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1062 SignatureHandlerLibrary::buffer_size);
1063 _buffer = bb->code_begin();
1064
1065 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1066 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1067 }
1068
1069 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1070 address handler = _handler;
1071 int insts_size = buffer->pure_insts_size();
1072 if (handler + insts_size > _handler_blob->code_end()) {
1073 // get a new handler blob
1074 handler = set_handler_blob();
1075 }
1076 if (handler != NULL) {
1077 memcpy(handler, buffer->insts_begin(), insts_size);
1078 pd_set_handler(handler);
1079 ICache::invalidate_range(handler, insts_size);
1080 _handler = handler + insts_size;
1081 }
1082 return handler;
1083 }
1084
1085 void SignatureHandlerLibrary::add(methodHandle method) {
1086 if (method->signature_handler() == NULL) {
1087 // use slow signature handler if we can't do better
1088 int handler_index = -1;
1089 // check if we can use customized (fast) signature handler
1090 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1091 // use customized signature handler
1092 MutexLocker mu(SignatureHandlerLibrary_lock);
1093 // make sure data structure is initialized
1094 initialize();
1095 // lookup method signature's fingerprint
1096 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1097 handler_index = _fingerprints->find(fingerprint);
1098 // create handler if necessary
1099 if (handler_index < 0) {
1100 ResourceMark rm;
1101 ptrdiff_t align_offset = (address)
1102 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1103 CodeBuffer buffer((address)(_buffer + align_offset),
1104 SignatureHandlerLibrary::buffer_size - align_offset);
1105 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1106 // copy into code heap
1107 address handler = set_handler(&buffer);
1108 if (handler == NULL) {
1109 // use slow signature handler
1110 } else {
1111 // debugging suppport
1112 if (PrintSignatureHandlers) {
1113 tty->cr();
1114 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1115 _handlers->length(),
1116 (method->is_static() ? "static" : "receiver"),
1117 method->name_and_sig_as_C_string(),
1118 fingerprint,
1119 buffer.insts_size());
1120 Disassembler::decode(handler, handler + buffer.insts_size());
1121 #ifndef PRODUCT
1122 tty->print_cr(" --- associated result handler ---");
1123 address rh_begin = Interpreter::result_handler(method()->result_type());
1124 address rh_end = rh_begin;
1125 while (*(int*)rh_end != 0) {
1126 rh_end += sizeof(int);
1127 }
1128 Disassembler::decode(rh_begin, rh_end);
1129 #endif
1130 }
1131 // add handler to library
1132 _fingerprints->append(fingerprint);
1133 _handlers->append(handler);
1134 // set handler index
1135 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1136 handler_index = _fingerprints->length() - 1;
1137 }
1138 }
1139 // Set handler under SignatureHandlerLibrary_lock
1140 if (handler_index < 0) {
1141 // use generic signature handler
1142 method->set_signature_handler(Interpreter::slow_signature_handler());
1143 } else {
1144 // set handler
1145 method->set_signature_handler(_handlers->at(handler_index));
1146 }
1147 } else {
1148 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1149 // use generic signature handler
1150 method->set_signature_handler(Interpreter::slow_signature_handler());
1151 }
1152 }
1153 #ifdef ASSERT
1154 int handler_index = -1;
1155 int fingerprint_index = -2;
1156 {
1157 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1158 // in any way if accessed from multiple threads. To avoid races with another
1159 // thread which may change the arrays in the above, mutex protected block, we
1160 // have to protect this read access here with the same mutex as well!
1161 MutexLocker mu(SignatureHandlerLibrary_lock);
1162 if (_handlers != NULL) {
1163 handler_index = _handlers->find(method->signature_handler());
1164 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1165 }
1166 }
1167 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1168 handler_index == fingerprint_index, "sanity check");
1169 #endif // ASSERT
1170 }
1171
1172
1173 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1174 address SignatureHandlerLibrary::_handler = NULL;
1175 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1176 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1177 address SignatureHandlerLibrary::_buffer = NULL;
1178
1179
1180 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1181 methodHandle m(thread, method);
1182 assert(m->is_native(), "sanity check");
1183 // lookup native function entry point if it doesn't exist
1184 bool in_base_library;
1185 if (!m->has_native_function()) {
1186 NativeLookup::lookup(m, in_base_library, CHECK);
1187 }
1188 // make sure signature handler is installed
1189 SignatureHandlerLibrary::add(m);
1190 // The interpreter entry point checks the signature handler first,
1191 // before trying to fetch the native entry point and klass mirror.
1192 // We must set the signature handler last, so that multiple processors
1193 // preparing the same method will be sure to see non-null entry & mirror.
1194 IRT_END
1195
1196 #if defined(IA32) || defined(AMD64) || defined(ARM)
1197 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1198 if (src_address == dest_address) {
1199 return;
1200 }
1201 ResetNoHandleMark rnm; // In a LEAF entry.
1202 HandleMark hm;
1203 ResourceMark rm;
1204 frame fr = thread->last_frame();
1205 assert(fr.is_interpreted_frame(), "");
1206 jint bci = fr.interpreter_frame_bci();
1207 methodHandle mh(thread, fr.interpreter_frame_method());
1208 Bytecode_invoke invoke(mh, bci);
1209 ArgumentSizeComputer asc(invoke.signature());
1210 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1211 Copy::conjoint_jbytes(src_address, dest_address,
1212 size_of_arguments * Interpreter::stackElementSize);
1213 IRT_END
1214 #endif