1 /*
2 * Copyright (c) 1997, 2010, 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 "incls/_precompiled.incl"
26 #include "incls/_interpreterRuntime.cpp.incl"
27
28 class UnlockFlagSaver {
29 private:
30 JavaThread* _thread;
31 bool _do_not_unlock;
32 public:
33 UnlockFlagSaver(JavaThread* t) {
34 _thread = t;
35 _do_not_unlock = t->do_not_unlock_if_synchronized();
36 t->set_do_not_unlock_if_synchronized(false);
37 }
38 ~UnlockFlagSaver() {
39 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
40 }
41 };
42
43 //------------------------------------------------------------------------------------------------------------------------
44 // State accessors
45
46 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
47 last_frame(thread).interpreter_frame_set_bcp(bcp);
48 if (ProfileInterpreter) {
49 // ProfileTraps uses MDOs independently of ProfileInterpreter.
50 // That is why we must check both ProfileInterpreter and mdo != NULL.
51 methodDataOop mdo = last_frame(thread).interpreter_frame_method()->method_data();
52 if (mdo != NULL) {
53 NEEDS_CLEANUP;
54 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
55 }
56 }
57 }
58
59 //------------------------------------------------------------------------------------------------------------------------
60 // Constants
61
62
63 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
64 // access constant pool
65 constantPoolOop pool = method(thread)->constants();
66 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
67 constantTag tag = pool->tag_at(index);
68
69 if (tag.is_unresolved_klass() || tag.is_klass()) {
70 klassOop klass = pool->klass_at(index, CHECK);
71 oop java_class = klass->klass_part()->java_mirror();
72 thread->set_vm_result(java_class);
73 } else {
74 #ifdef ASSERT
75 // If we entered this runtime routine, we believed the tag contained
76 // an unresolved string, an unresolved class or a resolved class.
77 // However, another thread could have resolved the unresolved string
78 // or class by the time we go there.
79 assert(tag.is_unresolved_string()|| tag.is_string(), "expected string");
80 #endif
81 oop s_oop = pool->string_at(index, CHECK);
82 thread->set_vm_result(s_oop);
83 }
84 IRT_END
85
86 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
87 assert(bytecode == Bytecodes::_fast_aldc ||
88 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
89 ResourceMark rm(thread);
90 methodHandle m (thread, method(thread));
91 Bytecode_loadconstant* ldc = Bytecode_loadconstant_at(m, bci(thread));
92 oop result = ldc->resolve_constant(THREAD);
93 DEBUG_ONLY(ConstantPoolCacheEntry* cpce = m->constants()->cache()->entry_at(ldc->cache_index()));
94 assert(result == cpce->f1(), "expected result for assembly code");
95 }
96 IRT_END
97
98
99 //------------------------------------------------------------------------------------------------------------------------
100 // Allocation
101
102 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index))
103 klassOop k_oop = pool->klass_at(index, CHECK);
104 instanceKlassHandle klass (THREAD, k_oop);
105
106 // Make sure we are not instantiating an abstract klass
107 klass->check_valid_for_instantiation(true, CHECK);
108
109 // Make sure klass is initialized
110 klass->initialize(CHECK);
111
112 // At this point the class may not be fully initialized
113 // because of recursive initialization. If it is fully
114 // initialized & has_finalized is not set, we rewrite
115 // it into its fast version (Note: no locking is needed
116 // here since this is an atomic byte write and can be
117 // done more than once).
118 //
119 // Note: In case of classes with has_finalized we don't
120 // rewrite since that saves us an extra check in
121 // the fast version which then would call the
122 // slow version anyway (and do a call back into
123 // Java).
124 // If we have a breakpoint, then we don't rewrite
125 // because the _breakpoint bytecode would be lost.
126 oop obj = klass->allocate_instance(CHECK);
127 thread->set_vm_result(obj);
128 IRT_END
129
130
131 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
132 oop obj = oopFactory::new_typeArray(type, size, CHECK);
133 thread->set_vm_result(obj);
134 IRT_END
135
136
137 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size))
138 // Note: no oopHandle for pool & klass needed since they are not used
139 // anymore after new_objArray() and no GC can happen before.
140 // (This may have to change if this code changes!)
141 klassOop klass = pool->klass_at(index, CHECK);
142 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
143 thread->set_vm_result(obj);
144 IRT_END
145
146
147 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
148 // We may want to pass in more arguments - could make this slightly faster
149 constantPoolOop constants = method(thread)->constants();
150 int i = get_index_u2(thread, Bytecodes::_multianewarray);
151 klassOop klass = constants->klass_at(i, CHECK);
152 int nof_dims = number_of_dimensions(thread);
153 assert(oop(klass)->is_klass(), "not a class");
154 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
155
156 // We must create an array of jints to pass to multi_allocate.
157 ResourceMark rm(thread);
158 const int small_dims = 10;
159 jint dim_array[small_dims];
160 jint *dims = &dim_array[0];
161 if (nof_dims > small_dims) {
162 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
163 }
164 for (int index = 0; index < nof_dims; index++) {
165 // offset from first_size_address is addressed as local[index]
166 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
167 dims[index] = first_size_address[n];
168 }
169 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
170 thread->set_vm_result(obj);
171 IRT_END
172
173
174 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
175 assert(obj->is_oop(), "must be a valid oop");
176 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise");
177 instanceKlass::register_finalizer(instanceOop(obj), CHECK);
178 IRT_END
179
180
181 // Quicken instance-of and check-cast bytecodes
182 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
183 // Force resolving; quicken the bytecode
184 int which = get_index_u2(thread, Bytecodes::_checkcast);
185 constantPoolOop cpool = method(thread)->constants();
186 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
187 // program we might have seen an unquick'd bytecode in the interpreter but have another
188 // thread quicken the bytecode before we get here.
189 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
190 klassOop klass = cpool->klass_at(which, CHECK);
191 thread->set_vm_result(klass);
192 IRT_END
193
194
195 //------------------------------------------------------------------------------------------------------------------------
196 // Exceptions
197
198 // Assume the compiler is (or will be) interested in this event.
199 // If necessary, create an MDO to hold the information, and record it.
200 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
201 assert(ProfileTraps, "call me only if profiling");
202 methodHandle trap_method(thread, method(thread));
203
204 if (trap_method.not_null()) {
205 methodDataHandle trap_mdo(thread, trap_method->method_data());
206 if (trap_mdo.is_null()) {
207 methodOopDesc::build_interpreter_method_data(trap_method, THREAD);
208 if (HAS_PENDING_EXCEPTION) {
209 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
210 CLEAR_PENDING_EXCEPTION;
211 }
212 trap_mdo = methodDataHandle(thread, trap_method->method_data());
213 // and fall through...
214 }
215 if (trap_mdo.not_null()) {
216 // Update per-method count of trap events. The interpreter
217 // is updating the MDO to simulate the effect of compiler traps.
218 int trap_bci = trap_method->bci_from(bcp(thread));
219 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
220 }
221 }
222 }
223
224 static Handle get_preinitialized_exception(klassOop k, TRAPS) {
225 // get klass
226 instanceKlass* klass = instanceKlass::cast(k);
227 assert(klass->is_initialized(),
228 "this klass should have been initialized during VM initialization");
229 // create instance - do not call constructor since we may have no
230 // (java) stack space left (should assert constructor is empty)
231 Handle exception;
232 oop exception_oop = klass->allocate_instance(CHECK_(exception));
233 exception = Handle(THREAD, exception_oop);
234 if (StackTraceInThrowable) {
235 java_lang_Throwable::fill_in_stack_trace(exception);
236 }
237 return exception;
238 }
239
240 // Special handling for stack overflow: since we don't have any (java) stack
241 // space left we use the pre-allocated & pre-initialized StackOverflowError
242 // klass to create an stack overflow error instance. We do not call its
243 // constructor for the same reason (it is empty, anyway).
244 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
245 Handle exception = get_preinitialized_exception(
246 SystemDictionary::StackOverflowError_klass(),
247 CHECK);
248 THROW_HANDLE(exception);
249 IRT_END
250
251
252 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
253 // lookup exception klass
254 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK);
255 if (ProfileTraps) {
256 if (s == vmSymbols::java_lang_ArithmeticException()) {
257 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
258 } else if (s == vmSymbols::java_lang_NullPointerException()) {
259 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
260 }
261 }
262 // create exception
263 Handle exception = Exceptions::new_exception(thread, s(), message);
264 thread->set_vm_result(exception());
265 IRT_END
266
267
268 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
269 ResourceMark rm(thread);
270 const char* klass_name = Klass::cast(obj->klass())->external_name();
271 // lookup exception klass
272 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK);
273 if (ProfileTraps) {
274 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
275 }
276 // create exception, with klass name as detail message
277 Handle exception = Exceptions::new_exception(thread, s(), klass_name);
278 thread->set_vm_result(exception());
279 IRT_END
280
281
282 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
283 char message[jintAsStringSize];
284 // lookup exception klass
285 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK);
286 if (ProfileTraps) {
287 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
288 }
289 // create exception
290 sprintf(message, "%d", index);
291 THROW_MSG(s(), message);
292 IRT_END
293
294 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
295 JavaThread* thread, oopDesc* obj))
296
297 ResourceMark rm(thread);
298 char* message = SharedRuntime::generate_class_cast_message(
299 thread, Klass::cast(obj->klass())->external_name());
300
301 if (ProfileTraps) {
302 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
303 }
304
305 // create exception
306 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
307 IRT_END
308
309 // required can be either a MethodType, or a Class (for a single argument)
310 // actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument)
311 IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread,
312 oopDesc* required,
313 oopDesc* actual)) {
314 ResourceMark rm(thread);
315 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual);
316
317 if (ProfileTraps) {
318 note_trap(thread, Deoptimization::Reason_constraint, CHECK);
319 }
320
321 // create exception
322 THROW_MSG(vmSymbols::java_dyn_WrongMethodTypeException(), message);
323 }
324 IRT_END
325
326
327
328 // exception_handler_for_exception(...) returns the continuation address,
329 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
330 // The exception oop is returned to make sure it is preserved over GC (it
331 // is only on the stack if the exception was thrown explicitly via athrow).
332 // During this operation, the expression stack contains the values for the
333 // bci where the exception happened. If the exception was propagated back
334 // from a call, the expression stack contains the values for the bci at the
335 // invoke w/o arguments (i.e., as if one were inside the call).
336 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
337
338 Handle h_exception(thread, exception);
339 methodHandle h_method (thread, method(thread));
340 constantPoolHandle h_constants(thread, h_method->constants());
341 typeArrayHandle h_extable (thread, h_method->exception_table());
342 bool should_repeat;
343 int handler_bci;
344 int current_bci = bci(thread);
345
346 // Need to do this check first since when _do_not_unlock_if_synchronized
347 // is set, we don't want to trigger any classloading which may make calls
348 // into java, or surprisingly find a matching exception handler for bci 0
349 // since at this moment the method hasn't been "officially" entered yet.
350 if (thread->do_not_unlock_if_synchronized()) {
351 ResourceMark rm;
352 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
353 thread->set_vm_result(exception);
354 #ifdef CC_INTERP
355 return (address) -1;
356 #else
357 return Interpreter::remove_activation_entry();
358 #endif
359 }
360
361 do {
362 should_repeat = false;
363
364 // assertions
365 #ifdef ASSERT
366 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
367 assert(h_exception->is_oop(), "just checking");
368 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
369 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
370 if (ExitVMOnVerifyError) vm_exit(-1);
371 ShouldNotReachHere();
372 }
373 #endif
374
375 // tracing
376 if (TraceExceptions) {
377 ttyLocker ttyl;
378 ResourceMark rm(thread);
379 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception());
380 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
381 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
382 }
383 // Don't go paging in something which won't be used.
384 // else if (h_extable->length() == 0) {
385 // // disabled for now - interpreter is not using shortcut yet
386 // // (shortcut is not to call runtime if we have no exception handlers)
387 // // warning("performance bug: should not call runtime if method has no exception handlers");
388 // }
389 // for AbortVMOnException flag
390 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
391
392 // exception handler lookup
393 KlassHandle h_klass(THREAD, h_exception->klass());
394 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD);
395 if (HAS_PENDING_EXCEPTION) {
396 // We threw an exception while trying to find the exception handler.
397 // Transfer the new exception to the exception handle which will
398 // be set into thread local storage, and do another lookup for an
399 // exception handler for this exception, this time starting at the
400 // BCI of the exception handler which caused the exception to be
401 // thrown (bug 4307310).
402 h_exception = Handle(THREAD, PENDING_EXCEPTION);
403 CLEAR_PENDING_EXCEPTION;
404 if (handler_bci >= 0) {
405 current_bci = handler_bci;
406 should_repeat = true;
407 }
408 }
409 } while (should_repeat == true);
410
411 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
412 // time throw or a stack unwinding throw and accordingly notify the debugger
413 if (JvmtiExport::can_post_on_exceptions()) {
414 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
415 }
416
417 #ifdef CC_INTERP
418 address continuation = (address)(intptr_t) handler_bci;
419 #else
420 address continuation = NULL;
421 #endif
422 address handler_pc = NULL;
423 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
424 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
425 // handler in this method, or (b) after a stack overflow there is not yet
426 // enough stack space available to reprotect the stack.
427 #ifndef CC_INTERP
428 continuation = Interpreter::remove_activation_entry();
429 #endif
430 // Count this for compilation purposes
431 h_method->interpreter_throwout_increment();
432 } else {
433 // handler in this method => change bci/bcp to handler bci/bcp and continue there
434 handler_pc = h_method->code_base() + handler_bci;
435 #ifndef CC_INTERP
436 set_bcp_and_mdp(handler_pc, thread);
437 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
438 #endif
439 }
440 // notify debugger of an exception catch
441 // (this is good for exceptions caught in native methods as well)
442 if (JvmtiExport::can_post_on_exceptions()) {
443 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
444 }
445
446 thread->set_vm_result(h_exception());
447 return continuation;
448 IRT_END
449
450
451 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
452 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
453 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
454 IRT_END
455
456
457 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
458 THROW(vmSymbols::java_lang_AbstractMethodError());
459 IRT_END
460
461
462 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
463 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
464 IRT_END
465
466
467 //------------------------------------------------------------------------------------------------------------------------
468 // Fields
469 //
470
471 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
472 // resolve field
473 FieldAccessInfo info;
474 constantPoolHandle pool(thread, method(thread)->constants());
475 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
476
477 {
478 JvmtiHideSingleStepping jhss(thread);
479 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode),
480 bytecode, false, CHECK);
481 } // end JvmtiHideSingleStepping
482
483 // check if link resolution caused cpCache to be updated
484 if (already_resolved(thread)) return;
485
486 // compute auxiliary field attributes
487 TosState state = as_TosState(info.field_type());
488
489 // We need to delay resolving put instructions on final fields
490 // until we actually invoke one. This is required so we throw
491 // exceptions at the correct place. If we do not resolve completely
492 // in the current pass, leaving the put_code set to zero will
493 // cause the next put instruction to reresolve.
494 bool is_put = (bytecode == Bytecodes::_putfield ||
495 bytecode == Bytecodes::_putstatic);
496 Bytecodes::Code put_code = (Bytecodes::Code)0;
497
498 // We also need to delay resolving getstatic instructions until the
499 // class is intitialized. This is required so that access to the static
500 // field will call the initialization function every time until the class
501 // is completely initialized ala. in 2.17.5 in JVM Specification.
502 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop());
503 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
504 !klass->is_initialized());
505 Bytecodes::Code get_code = (Bytecodes::Code)0;
506
507
508 if (!uninitialized_static) {
509 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
510 if (is_put || !info.access_flags().is_final()) {
511 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
512 }
513 }
514
515 cache_entry(thread)->set_field(
516 get_code,
517 put_code,
518 info.klass(),
519 info.field_index(),
520 info.field_offset(),
521 state,
522 info.access_flags().is_final(),
523 info.access_flags().is_volatile()
524 );
525 IRT_END
526
527
528 //------------------------------------------------------------------------------------------------------------------------
529 // Synchronization
530 //
531 // The interpreter's synchronization code is factored out so that it can
532 // be shared by method invocation and synchronized blocks.
533 //%note synchronization_3
534
535 static void trace_locking(Handle& h_locking_obj, bool is_locking) {
536 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking);
537 }
538
539
540 //%note monitor_1
541 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
542 #ifdef ASSERT
543 thread->last_frame().interpreter_frame_verify_monitor(elem);
544 #endif
545 if (PrintBiasedLockingStatistics) {
546 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
547 }
548 Handle h_obj(thread, elem->obj());
549 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
550 "must be NULL or an object");
551 if (UseBiasedLocking) {
552 // Retry fast entry if bias is revoked to avoid unnecessary inflation
553 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
554 } else {
555 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
556 }
557 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
558 "must be NULL or an object");
559 #ifdef ASSERT
560 thread->last_frame().interpreter_frame_verify_monitor(elem);
561 #endif
562 IRT_END
563
564
565 //%note monitor_1
566 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
567 #ifdef ASSERT
568 thread->last_frame().interpreter_frame_verify_monitor(elem);
569 #endif
570 Handle h_obj(thread, elem->obj());
571 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
572 "must be NULL or an object");
573 if (elem == NULL || h_obj()->is_unlocked()) {
574 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
575 }
576 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
577 // Free entry. This must be done here, since a pending exception might be installed on
578 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
579 elem->set_obj(NULL);
580 #ifdef ASSERT
581 thread->last_frame().interpreter_frame_verify_monitor(elem);
582 #endif
583 IRT_END
584
585
586 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
587 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
588 IRT_END
589
590
591 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
592 // Returns an illegal exception to install into the current thread. The
593 // pending_exception flag is cleared so normal exception handling does not
594 // trigger. Any current installed exception will be overwritten. This
595 // method will be called during an exception unwind.
596
597 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
598 Handle exception(thread, thread->vm_result());
599 assert(exception() != NULL, "vm result should be set");
600 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
601 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
602 exception = get_preinitialized_exception(
603 SystemDictionary::IllegalMonitorStateException_klass(),
604 CATCH);
605 }
606 thread->set_vm_result(exception());
607 IRT_END
608
609
610 //------------------------------------------------------------------------------------------------------------------------
611 // Invokes
612
613 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp))
614 return method->orig_bytecode_at(method->bci_from(bcp));
615 IRT_END
616
617 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code))
618 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
619 IRT_END
620
621 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp))
622 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
623 IRT_END
624
625 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode))
626 // extract receiver from the outgoing argument list if necessary
627 Handle receiver(thread, NULL);
628 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
629 ResourceMark rm(thread);
630 methodHandle m (thread, method(thread));
631 Bytecode_invoke* call = Bytecode_invoke_at(m, bci(thread));
632 symbolHandle signature (thread, call->signature());
633 receiver = Handle(thread,
634 thread->last_frame().interpreter_callee_receiver(signature));
635 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
636 "sanity check");
637 assert(receiver.is_null() ||
638 Universe::heap()->is_in_reserved(receiver->klass()),
639 "sanity check");
640 }
641
642 // resolve method
643 CallInfo info;
644 constantPoolHandle pool(thread, method(thread)->constants());
645
646 {
647 JvmtiHideSingleStepping jhss(thread);
648 LinkResolver::resolve_invoke(info, receiver, pool,
649 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
650 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
651 int retry_count = 0;
652 while (info.resolved_method()->is_old()) {
653 // It is very unlikely that method is redefined more than 100 times
654 // in the middle of resolve. If it is looping here more than 100 times
655 // means then there could be a bug here.
656 guarantee((retry_count++ < 100),
657 "Could not resolve to latest version of redefined method");
658 // method is redefined in the middle of resolve so re-try.
659 LinkResolver::resolve_invoke(info, receiver, pool,
660 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
661 }
662 }
663 } // end JvmtiHideSingleStepping
664
665 // check if link resolution caused cpCache to be updated
666 if (already_resolved(thread)) return;
667
668 if (bytecode == Bytecodes::_invokeinterface) {
669
670 if (TraceItables && Verbose) {
671 ResourceMark rm(thread);
672 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
673 }
674 if (info.resolved_method()->method_holder() ==
675 SystemDictionary::Object_klass()) {
676 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
677 // (see also cpCacheOop.cpp for details)
678 methodHandle rm = info.resolved_method();
679 assert(rm->is_final() || info.has_vtable_index(),
680 "should have been set already");
681 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index());
682 } else {
683 // Setup itable entry
684 int index = klassItable::compute_itable_index(info.resolved_method()());
685 cache_entry(thread)->set_interface_call(info.resolved_method(), index);
686 }
687 } else {
688 cache_entry(thread)->set_method(
689 bytecode,
690 info.resolved_method(),
691 info.vtable_index());
692 }
693 IRT_END
694
695
696 // First time execution: Resolve symbols, create a permanent CallSite object.
697 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
698 ResourceMark rm(thread);
699
700 assert(EnableInvokeDynamic, "");
701
702 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
703
704 methodHandle caller_method(thread, method(thread));
705
706 constantPoolHandle pool(thread, caller_method->constants());
707 pool->set_invokedynamic(); // mark header to flag active call sites
708
709 int caller_bci = 0;
710 int site_index = 0;
711 { address caller_bcp = bcp(thread);
712 caller_bci = caller_method->bci_from(caller_bcp);
713 site_index = Bytes::get_native_u4(caller_bcp+1);
714 }
715 assert(site_index == InterpreterRuntime::bytecode(thread)->get_index_u4(bytecode), "");
716 assert(constantPoolCacheOopDesc::is_secondary_index(site_index), "proper format");
717 // there is a second CPC entries that is of interest; it caches signature info:
718 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index();
719
720 // first resolve the signature to a MH.invoke methodOop
721 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) {
722 JvmtiHideSingleStepping jhss(thread);
723 CallInfo info;
724 LinkResolver::resolve_invoke(info, Handle(), pool,
725 site_index, bytecode, CHECK);
726 // The main entry corresponds to a JVM_CONSTANT_InvokeDynamic, and serves
727 // as a common reference point for all invokedynamic call sites with
728 // that exact call descriptor. We will link it in the CP cache exactly
729 // as if it were an invokevirtual of MethodHandle.invoke.
730 pool->cache()->entry_at(main_index)->set_method(
731 bytecode,
732 info.resolved_method(),
733 info.vtable_index());
734 }
735
736 // The method (f2 entry) of the main entry is the MH.invoke for the
737 // invokedynamic target call signature.
738 oop f1_value = pool->cache()->entry_at(main_index)->f1();
739 methodHandle signature_invoker(THREAD, (methodOop) f1_value);
740 assert(signature_invoker.not_null() && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(),
741 "correct result from LinkResolver::resolve_invokedynamic");
742
743 Handle bootm = SystemDictionary::find_bootstrap_method(caller_method, caller_bci,
744 main_index, CHECK);
745 if (bootm.is_null()) {
746 THROW_MSG(vmSymbols::java_lang_IllegalStateException(),
747 "no bootstrap method found for invokedynamic");
748 }
749
750 // Short circuit if CallSite has been bound already:
751 if (!pool->cache()->secondary_entry_at(site_index)->is_f1_null())
752 return;
753
754 symbolHandle call_site_name(THREAD, pool->name_ref_at(site_index));
755
756 Handle info; // NYI: Other metadata from a new kind of CP entry. (Annotations?)
757
758 Handle call_site
759 = SystemDictionary::make_dynamic_call_site(bootm,
760 // Callee information:
761 call_site_name,
762 signature_invoker,
763 info,
764 // Caller information:
765 caller_method,
766 caller_bci,
767 CHECK);
768
769 // In the secondary entry, the f1 field is the call site, and the f2 (index)
770 // field is some data about the invoke site. Currently, it is just the BCI.
771 // Later, it might be changed to help manage inlining dependencies.
772 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site, signature_invoker);
773 }
774 IRT_END
775
776
777 //------------------------------------------------------------------------------------------------------------------------
778 // Miscellaneous
779
780
781 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
782 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
783 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
784 if (branch_bcp != NULL && nm != NULL) {
785 // This was a successful request for an OSR nmethod. Because
786 // frequency_counter_overflow_inner ends with a safepoint check,
787 // nm could have been unloaded so look it up again. It's unsafe
788 // to examine nm directly since it might have been freed and used
789 // for something else.
790 frame fr = thread->last_frame();
791 methodOop method = fr.interpreter_frame_method();
792 int bci = method->bci_from(fr.interpreter_frame_bcp());
793 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
794 }
795 return nm;
796 }
797
798 IRT_ENTRY(nmethod*,
799 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
800 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
801 // flag, in case this method triggers classloading which will call into Java.
802 UnlockFlagSaver fs(thread);
803
804 frame fr = thread->last_frame();
805 assert(fr.is_interpreted_frame(), "must come from interpreter");
806 methodHandle method(thread, fr.interpreter_frame_method());
807 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
808 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
809
810 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, thread);
811
812 if (osr_nm != NULL) {
813 // We may need to do on-stack replacement which requires that no
814 // monitors in the activation are biased because their
815 // BasicObjectLocks will need to migrate during OSR. Force
816 // unbiasing of all monitors in the activation now (even though
817 // the OSR nmethod might be invalidated) because we don't have a
818 // safepoint opportunity later once the migration begins.
819 if (UseBiasedLocking) {
820 ResourceMark rm;
821 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
822 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
823 kptr < fr.interpreter_frame_monitor_begin();
824 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
825 if( kptr->obj() != NULL ) {
826 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
827 }
828 }
829 BiasedLocking::revoke(objects_to_revoke);
830 }
831 }
832 return osr_nm;
833 IRT_END
834
835 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp))
836 assert(ProfileInterpreter, "must be profiling interpreter");
837 int bci = method->bci_from(cur_bcp);
838 methodDataOop mdo = method->method_data();
839 if (mdo == NULL) return 0;
840 return mdo->bci_to_di(bci);
841 IRT_END
842
843 IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp))
844 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
845 // flag, in case this method triggers classloading which will call into Java.
846 UnlockFlagSaver fs(thread);
847
848 assert(ProfileInterpreter, "must be profiling interpreter");
849 frame fr = thread->last_frame();
850 assert(fr.is_interpreted_frame(), "must come from interpreter");
851 methodHandle method(thread, fr.interpreter_frame_method());
852 int bci = method->bci_from(cur_bcp);
853 methodOopDesc::build_interpreter_method_data(method, THREAD);
854 if (HAS_PENDING_EXCEPTION) {
855 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
856 CLEAR_PENDING_EXCEPTION;
857 // and fall through...
858 }
859 methodDataOop mdo = method->method_data();
860 if (mdo == NULL) return 0;
861 return mdo->bci_to_di(bci);
862 IRT_END
863
864
865 #ifdef ASSERT
866 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp))
867 assert(ProfileInterpreter, "must be profiling interpreter");
868
869 methodDataOop mdo = method->method_data();
870 assert(mdo != NULL, "must not be null");
871
872 int bci = method->bci_from(bcp);
873
874 address mdp2 = mdo->bci_to_dp(bci);
875 if (mdp != mdp2) {
876 ResourceMark rm;
877 ResetNoHandleMark rnm; // In a LEAF entry.
878 HandleMark hm;
879 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
880 int current_di = mdo->dp_to_di(mdp);
881 int expected_di = mdo->dp_to_di(mdp2);
882 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
883 int expected_approx_bci = mdo->data_at(expected_di)->bci();
884 int approx_bci = -1;
885 if (current_di >= 0) {
886 approx_bci = mdo->data_at(current_di)->bci();
887 }
888 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
889 mdo->print_on(tty);
890 method->print_codes();
891 }
892 assert(mdp == mdp2, "wrong mdp");
893 IRT_END
894 #endif // ASSERT
895
896 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
897 assert(ProfileInterpreter, "must be profiling interpreter");
898 ResourceMark rm(thread);
899 HandleMark hm(thread);
900 frame fr = thread->last_frame();
901 assert(fr.is_interpreted_frame(), "must come from interpreter");
902 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data());
903
904 // Grab a lock to ensure atomic access to setting the return bci and
905 // the displacement. This can block and GC, invalidating all naked oops.
906 MutexLocker ml(RetData_lock);
907
908 // ProfileData is essentially a wrapper around a derived oop, so we
909 // need to take the lock before making any ProfileData structures.
910 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
911 RetData* rdata = data->as_RetData();
912 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
913 fr.interpreter_frame_set_mdp(new_mdp);
914 IRT_END
915
916
917 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
918 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
919 // stack traversal automatically takes care of preserving arguments for invoke, so
920 // this is no longer needed.
921
922 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
923 // if this is called during a safepoint
924
925 if (JvmtiExport::should_post_single_step()) {
926 // We are called during regular safepoints and when the VM is
927 // single stepping. If any thread is marked for single stepping,
928 // then we may have JVMTI work to do.
929 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
930 }
931 IRT_END
932
933 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
934 ConstantPoolCacheEntry *cp_entry))
935
936 // check the access_flags for the field in the klass
937 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1());
938 typeArrayOop fields = ik->fields();
939 int index = cp_entry->field_index();
940 assert(index < fields->length(), "holders field index is out of range");
941 // bail out if field accesses are not watched
942 if ((fields->ushort_at(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, (klassOop)cp_entry->f1());
964 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), 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 klassOop k = (klassOop)cp_entry->f1();
972
973 // check the access_flags for the field in the klass
974 instanceKlass* ik = instanceKlass::cast(k);
975 typeArrayOop fields = ik->fields();
976 int index = cp_entry->field_index();
977 assert(index < fields->length(), "holders field index is out of range");
978 // bail out if field modifications are not watched
979 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
980
981 char sig_type = '\0';
982
983 switch(cp_entry->flag_state()) {
984 case btos: sig_type = 'Z'; break;
985 case ctos: sig_type = 'C'; break;
986 case stos: sig_type = 'S'; break;
987 case itos: sig_type = 'I'; break;
988 case ftos: sig_type = 'F'; break;
989 case atos: sig_type = 'L'; break;
990 case ltos: sig_type = 'J'; break;
991 case dtos: sig_type = 'D'; break;
992 default: ShouldNotReachHere(); return;
993 }
994 bool is_static = (obj == NULL);
995
996 HandleMark hm(thread);
997 instanceKlassHandle h_klass(thread, k);
998 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static);
999 jvalue fvalue;
1000 #ifdef _LP64
1001 fvalue = *value;
1002 #else
1003 // Long/double values are stored unaligned and also noncontiguously with
1004 // tagged stacks. We can't just do a simple assignment even in the non-
1005 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1006 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1007 // We assume that the two halves of longs/doubles are stored in interpreter
1008 // stack slots in platform-endian order.
1009 jlong_accessor u;
1010 jint* newval = (jint*)value;
1011 u.words[0] = newval[0];
1012 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1013 fvalue.j = u.long_value;
1014 #endif // _LP64
1015
1016 Handle h_obj;
1017 if (!is_static) {
1018 // non-static field accessors have an object, but we need a handle
1019 h_obj = Handle(thread, obj);
1020 }
1021
1022 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1023 fid, sig_type, &fvalue);
1024 IRT_END
1025
1026 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1027 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1028 IRT_END
1029
1030
1031 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1032 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1033 IRT_END
1034
1035 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1036 {
1037 return (Interpreter::contains(pc) ? 1 : 0);
1038 }
1039 IRT_END
1040
1041
1042 // Implementation of SignatureHandlerLibrary
1043
1044 address SignatureHandlerLibrary::set_handler_blob() {
1045 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1046 if (handler_blob == NULL) {
1047 return NULL;
1048 }
1049 address handler = handler_blob->code_begin();
1050 _handler_blob = handler_blob;
1051 _handler = handler;
1052 return handler;
1053 }
1054
1055 void SignatureHandlerLibrary::initialize() {
1056 if (_fingerprints != NULL) {
1057 return;
1058 }
1059 if (set_handler_blob() == NULL) {
1060 vm_exit_out_of_memory(blob_size, "native signature handlers");
1061 }
1062
1063 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1064 SignatureHandlerLibrary::buffer_size);
1065 _buffer = bb->code_begin();
1066
1067 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true);
1068 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true);
1069 }
1070
1071 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1072 address handler = _handler;
1073 int insts_size = buffer->pure_insts_size();
1074 if (handler + insts_size > _handler_blob->code_end()) {
1075 // get a new handler blob
1076 handler = set_handler_blob();
1077 }
1078 if (handler != NULL) {
1079 memcpy(handler, buffer->insts_begin(), insts_size);
1080 pd_set_handler(handler);
1081 ICache::invalidate_range(handler, insts_size);
1082 _handler = handler + insts_size;
1083 }
1084 return handler;
1085 }
1086
1087 void SignatureHandlerLibrary::add(methodHandle method) {
1088 if (method->signature_handler() == NULL) {
1089 // use slow signature handler if we can't do better
1090 int handler_index = -1;
1091 // check if we can use customized (fast) signature handler
1092 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1093 // use customized signature handler
1094 MutexLocker mu(SignatureHandlerLibrary_lock);
1095 // make sure data structure is initialized
1096 initialize();
1097 // lookup method signature's fingerprint
1098 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1099 handler_index = _fingerprints->find(fingerprint);
1100 // create handler if necessary
1101 if (handler_index < 0) {
1102 ResourceMark rm;
1103 ptrdiff_t align_offset = (address)
1104 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1105 CodeBuffer buffer((address)(_buffer + align_offset),
1106 SignatureHandlerLibrary::buffer_size - align_offset);
1107 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1108 // copy into code heap
1109 address handler = set_handler(&buffer);
1110 if (handler == NULL) {
1111 // use slow signature handler
1112 } else {
1113 // debugging suppport
1114 if (PrintSignatureHandlers) {
1115 tty->cr();
1116 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1117 _handlers->length(),
1118 (method->is_static() ? "static" : "receiver"),
1119 method->name_and_sig_as_C_string(),
1120 fingerprint,
1121 buffer.insts_size());
1122 Disassembler::decode(handler, handler + buffer.insts_size());
1123 #ifndef PRODUCT
1124 tty->print_cr(" --- associated result handler ---");
1125 address rh_begin = Interpreter::result_handler(method()->result_type());
1126 address rh_end = rh_begin;
1127 while (*(int*)rh_end != 0) {
1128 rh_end += sizeof(int);
1129 }
1130 Disassembler::decode(rh_begin, rh_end);
1131 #endif
1132 }
1133 // add handler to library
1134 _fingerprints->append(fingerprint);
1135 _handlers->append(handler);
1136 // set handler index
1137 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1138 handler_index = _fingerprints->length() - 1;
1139 }
1140 }
1141 } else {
1142 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1143 }
1144 if (handler_index < 0) {
1145 // use generic signature handler
1146 method->set_signature_handler(Interpreter::slow_signature_handler());
1147 } else {
1148 // set handler
1149 method->set_signature_handler(_handlers->at(handler_index));
1150 }
1151 }
1152 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1153 _handlers->find(method->signature_handler()) == _fingerprints->find(Fingerprinter(method).fingerprint()),
1154 "sanity check");
1155 }
1156
1157
1158 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1159 address SignatureHandlerLibrary::_handler = NULL;
1160 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1161 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1162 address SignatureHandlerLibrary::_buffer = NULL;
1163
1164
1165 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method))
1166 methodHandle m(thread, method);
1167 assert(m->is_native(), "sanity check");
1168 // lookup native function entry point if it doesn't exist
1169 bool in_base_library;
1170 if (!m->has_native_function()) {
1171 NativeLookup::lookup(m, in_base_library, CHECK);
1172 }
1173 // make sure signature handler is installed
1174 SignatureHandlerLibrary::add(m);
1175 // The interpreter entry point checks the signature handler first,
1176 // before trying to fetch the native entry point and klass mirror.
1177 // We must set the signature handler last, so that multiple processors
1178 // preparing the same method will be sure to see non-null entry & mirror.
1179 IRT_END
1180
1181 #if defined(IA32) || defined(AMD64)
1182 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1183 if (src_address == dest_address) {
1184 return;
1185 }
1186 ResetNoHandleMark rnm; // In a LEAF entry.
1187 HandleMark hm;
1188 ResourceMark rm;
1189 frame fr = thread->last_frame();
1190 assert(fr.is_interpreted_frame(), "");
1191 jint bci = fr.interpreter_frame_bci();
1192 methodHandle mh(thread, fr.interpreter_frame_method());
1193 Bytecode_invoke* invoke = Bytecode_invoke_at(mh, bci);
1194 ArgumentSizeComputer asc(invoke->signature());
1195 int size_of_arguments = (asc.size() + (invoke->has_receiver() ? 1 : 0)); // receiver
1196 Copy::conjoint_jbytes(src_address, dest_address,
1197 size_of_arguments * Interpreter::stackElementSize);
1198 IRT_END
1199 #endif