Wed, 08 Apr 2009 10:56:49 -0700
6655638: dynamic languages need method handles
Summary: initial implementation, with known omissions (x86/64, sparc, compiler optim., c-oops, C++ interp.)
Reviewed-by: kvn, twisti, never
1 /*
2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_interpreterRuntime.cpp.incl"
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 };
43 //------------------------------------------------------------------------------------------------------------------------
44 // State accessors
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 }
59 //------------------------------------------------------------------------------------------------------------------------
60 // Constants
63 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
64 // access constant pool
65 constantPoolOop pool = method(thread)->constants();
66 int index = wide ? two_byte_index(thread) : one_byte_index(thread);
67 constantTag tag = pool->tag_at(index);
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
87 //------------------------------------------------------------------------------------------------------------------------
88 // Allocation
90 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index))
91 klassOop k_oop = pool->klass_at(index, CHECK);
92 instanceKlassHandle klass (THREAD, k_oop);
94 // Make sure we are not instantiating an abstract klass
95 klass->check_valid_for_instantiation(true, CHECK);
97 // Make sure klass is initialized
98 klass->initialize(CHECK);
100 // At this point the class may not be fully initialized
101 // because of recursive initialization. If it is fully
102 // initialized & has_finalized is not set, we rewrite
103 // it into its fast version (Note: no locking is needed
104 // here since this is an atomic byte write and can be
105 // done more than once).
106 //
107 // Note: In case of classes with has_finalized we don't
108 // rewrite since that saves us an extra check in
109 // the fast version which then would call the
110 // slow version anyway (and do a call back into
111 // Java).
112 // If we have a breakpoint, then we don't rewrite
113 // because the _breakpoint bytecode would be lost.
114 oop obj = klass->allocate_instance(CHECK);
115 thread->set_vm_result(obj);
116 IRT_END
119 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
120 oop obj = oopFactory::new_typeArray(type, size, CHECK);
121 thread->set_vm_result(obj);
122 IRT_END
125 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size))
126 // Note: no oopHandle for pool & klass needed since they are not used
127 // anymore after new_objArray() and no GC can happen before.
128 // (This may have to change if this code changes!)
129 klassOop klass = pool->klass_at(index, CHECK);
130 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
131 thread->set_vm_result(obj);
132 IRT_END
135 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
136 // We may want to pass in more arguments - could make this slightly faster
137 constantPoolOop constants = method(thread)->constants();
138 int i = two_byte_index(thread);
139 klassOop klass = constants->klass_at(i, CHECK);
140 int nof_dims = number_of_dimensions(thread);
141 assert(oop(klass)->is_klass(), "not a class");
142 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
144 // We must create an array of jints to pass to multi_allocate.
145 ResourceMark rm(thread);
146 const int small_dims = 10;
147 jint dim_array[small_dims];
148 jint *dims = &dim_array[0];
149 if (nof_dims > small_dims) {
150 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
151 }
152 for (int index = 0; index < nof_dims; index++) {
153 // offset from first_size_address is addressed as local[index]
154 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
155 dims[index] = first_size_address[n];
156 }
157 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
158 thread->set_vm_result(obj);
159 IRT_END
162 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
163 assert(obj->is_oop(), "must be a valid oop");
164 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise");
165 instanceKlass::register_finalizer(instanceOop(obj), CHECK);
166 IRT_END
169 // Quicken instance-of and check-cast bytecodes
170 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
171 // Force resolving; quicken the bytecode
172 int which = two_byte_index(thread);
173 constantPoolOop cpool = method(thread)->constants();
174 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
175 // program we might have seen an unquick'd bytecode in the interpreter but have another
176 // thread quicken the bytecode before we get here.
177 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
178 klassOop klass = cpool->klass_at(which, CHECK);
179 thread->set_vm_result(klass);
180 IRT_END
183 //------------------------------------------------------------------------------------------------------------------------
184 // Exceptions
186 // Assume the compiler is (or will be) interested in this event.
187 // If necessary, create an MDO to hold the information, and record it.
188 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
189 assert(ProfileTraps, "call me only if profiling");
190 methodHandle trap_method(thread, method(thread));
191 if (trap_method.not_null()) {
192 methodDataHandle trap_mdo(thread, trap_method->method_data());
193 if (trap_mdo.is_null()) {
194 methodOopDesc::build_interpreter_method_data(trap_method, THREAD);
195 if (HAS_PENDING_EXCEPTION) {
196 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
197 CLEAR_PENDING_EXCEPTION;
198 }
199 trap_mdo = methodDataHandle(thread, trap_method->method_data());
200 // and fall through...
201 }
202 if (trap_mdo.not_null()) {
203 // Update per-method count of trap events. The interpreter
204 // is updating the MDO to simulate the effect of compiler traps.
205 int trap_bci = trap_method->bci_from(bcp(thread));
206 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
207 }
208 }
209 }
211 static Handle get_preinitialized_exception(klassOop k, TRAPS) {
212 // get klass
213 instanceKlass* klass = instanceKlass::cast(k);
214 assert(klass->is_initialized(),
215 "this klass should have been initialized during VM initialization");
216 // create instance - do not call constructor since we may have no
217 // (java) stack space left (should assert constructor is empty)
218 Handle exception;
219 oop exception_oop = klass->allocate_instance(CHECK_(exception));
220 exception = Handle(THREAD, exception_oop);
221 if (StackTraceInThrowable) {
222 java_lang_Throwable::fill_in_stack_trace(exception);
223 }
224 return exception;
225 }
227 // Special handling for stack overflow: since we don't have any (java) stack
228 // space left we use the pre-allocated & pre-initialized StackOverflowError
229 // klass to create an stack overflow error instance. We do not call its
230 // constructor for the same reason (it is empty, anyway).
231 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
232 Handle exception = get_preinitialized_exception(
233 SystemDictionary::StackOverflowError_klass(),
234 CHECK);
235 THROW_HANDLE(exception);
236 IRT_END
239 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
240 // lookup exception klass
241 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK);
242 if (ProfileTraps) {
243 if (s == vmSymbols::java_lang_ArithmeticException()) {
244 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
245 } else if (s == vmSymbols::java_lang_NullPointerException()) {
246 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
247 }
248 }
249 // create exception
250 Handle exception = Exceptions::new_exception(thread, s(), message);
251 thread->set_vm_result(exception());
252 IRT_END
255 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
256 ResourceMark rm(thread);
257 const char* klass_name = Klass::cast(obj->klass())->external_name();
258 // lookup exception klass
259 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK);
260 if (ProfileTraps) {
261 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
262 }
263 // create exception, with klass name as detail message
264 Handle exception = Exceptions::new_exception(thread, s(), klass_name);
265 thread->set_vm_result(exception());
266 IRT_END
269 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
270 char message[jintAsStringSize];
271 // lookup exception klass
272 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK);
273 if (ProfileTraps) {
274 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
275 }
276 // create exception
277 sprintf(message, "%d", index);
278 THROW_MSG(s(), message);
279 IRT_END
281 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
282 JavaThread* thread, oopDesc* obj))
284 ResourceMark rm(thread);
285 char* message = SharedRuntime::generate_class_cast_message(
286 thread, Klass::cast(obj->klass())->external_name());
288 if (ProfileTraps) {
289 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
290 }
292 // create exception
293 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
294 IRT_END
296 // required can be either a MethodType, or a Class (for a single argument)
297 // actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument)
298 IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread,
299 oopDesc* required,
300 oopDesc* actual)) {
301 ResourceMark rm(thread);
302 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual);
304 if (ProfileTraps) {
305 note_trap(thread, Deoptimization::Reason_constraint, CHECK);
306 }
308 // create exception
309 THROW_MSG(vmSymbols::java_dyn_WrongMethodTypeException(), message);
310 }
311 IRT_END
315 // exception_handler_for_exception(...) returns the continuation address,
316 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
317 // The exception oop is returned to make sure it is preserved over GC (it
318 // is only on the stack if the exception was thrown explicitly via athrow).
319 // During this operation, the expression stack contains the values for the
320 // bci where the exception happened. If the exception was propagated back
321 // from a call, the expression stack contains the values for the bci at the
322 // invoke w/o arguments (i.e., as if one were inside the call).
323 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
325 Handle h_exception(thread, exception);
326 methodHandle h_method (thread, method(thread));
327 constantPoolHandle h_constants(thread, h_method->constants());
328 typeArrayHandle h_extable (thread, h_method->exception_table());
329 bool should_repeat;
330 int handler_bci;
331 int current_bci = bcp(thread) - h_method->code_base();
333 // Need to do this check first since when _do_not_unlock_if_synchronized
334 // is set, we don't want to trigger any classloading which may make calls
335 // into java, or surprisingly find a matching exception handler for bci 0
336 // since at this moment the method hasn't been "officially" entered yet.
337 if (thread->do_not_unlock_if_synchronized()) {
338 ResourceMark rm;
339 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
340 thread->set_vm_result(exception);
341 #ifdef CC_INTERP
342 return (address) -1;
343 #else
344 return Interpreter::remove_activation_entry();
345 #endif
346 }
348 do {
349 should_repeat = false;
351 // assertions
352 #ifdef ASSERT
353 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
354 assert(h_exception->is_oop(), "just checking");
355 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
356 if (!(h_exception->is_a(SystemDictionary::throwable_klass()))) {
357 if (ExitVMOnVerifyError) vm_exit(-1);
358 ShouldNotReachHere();
359 }
360 #endif
362 // tracing
363 if (TraceExceptions) {
364 ttyLocker ttyl;
365 ResourceMark rm(thread);
366 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception());
367 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
368 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
369 }
370 // Don't go paging in something which won't be used.
371 // else if (h_extable->length() == 0) {
372 // // disabled for now - interpreter is not using shortcut yet
373 // // (shortcut is not to call runtime if we have no exception handlers)
374 // // warning("performance bug: should not call runtime if method has no exception handlers");
375 // }
376 // for AbortVMOnException flag
377 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
379 // exception handler lookup
380 KlassHandle h_klass(THREAD, h_exception->klass());
381 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD);
382 if (HAS_PENDING_EXCEPTION) {
383 // We threw an exception while trying to find the exception handler.
384 // Transfer the new exception to the exception handle which will
385 // be set into thread local storage, and do another lookup for an
386 // exception handler for this exception, this time starting at the
387 // BCI of the exception handler which caused the exception to be
388 // thrown (bug 4307310).
389 h_exception = Handle(THREAD, PENDING_EXCEPTION);
390 CLEAR_PENDING_EXCEPTION;
391 if (handler_bci >= 0) {
392 current_bci = handler_bci;
393 should_repeat = true;
394 }
395 }
396 } while (should_repeat == true);
398 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
399 // time throw or a stack unwinding throw and accordingly notify the debugger
400 if (JvmtiExport::can_post_exceptions()) {
401 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
402 }
404 #ifdef CC_INTERP
405 address continuation = (address)(intptr_t) handler_bci;
406 #else
407 address continuation = NULL;
408 #endif
409 address handler_pc = NULL;
410 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
411 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
412 // handler in this method, or (b) after a stack overflow there is not yet
413 // enough stack space available to reprotect the stack.
414 #ifndef CC_INTERP
415 continuation = Interpreter::remove_activation_entry();
416 #endif
417 // Count this for compilation purposes
418 h_method->interpreter_throwout_increment();
419 } else {
420 // handler in this method => change bci/bcp to handler bci/bcp and continue there
421 handler_pc = h_method->code_base() + handler_bci;
422 #ifndef CC_INTERP
423 set_bcp_and_mdp(handler_pc, thread);
424 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
425 #endif
426 }
427 // notify debugger of an exception catch
428 // (this is good for exceptions caught in native methods as well)
429 if (JvmtiExport::can_post_exceptions()) {
430 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
431 }
433 thread->set_vm_result(h_exception());
434 return continuation;
435 IRT_END
438 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
439 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
440 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
441 IRT_END
444 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
445 THROW(vmSymbols::java_lang_AbstractMethodError());
446 IRT_END
449 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
450 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
451 IRT_END
454 //------------------------------------------------------------------------------------------------------------------------
455 // Fields
456 //
458 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
459 // resolve field
460 FieldAccessInfo info;
461 constantPoolHandle pool(thread, method(thread)->constants());
462 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
464 {
465 JvmtiHideSingleStepping jhss(thread);
466 LinkResolver::resolve_field(info, pool, two_byte_index(thread),
467 bytecode, false, CHECK);
468 } // end JvmtiHideSingleStepping
470 // check if link resolution caused cpCache to be updated
471 if (already_resolved(thread)) return;
473 // compute auxiliary field attributes
474 TosState state = as_TosState(info.field_type());
476 // We need to delay resolving put instructions on final fields
477 // until we actually invoke one. This is required so we throw
478 // exceptions at the correct place. If we do not resolve completely
479 // in the current pass, leaving the put_code set to zero will
480 // cause the next put instruction to reresolve.
481 bool is_put = (bytecode == Bytecodes::_putfield ||
482 bytecode == Bytecodes::_putstatic);
483 Bytecodes::Code put_code = (Bytecodes::Code)0;
485 // We also need to delay resolving getstatic instructions until the
486 // class is intitialized. This is required so that access to the static
487 // field will call the initialization function every time until the class
488 // is completely initialized ala. in 2.17.5 in JVM Specification.
489 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop());
490 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
491 !klass->is_initialized());
492 Bytecodes::Code get_code = (Bytecodes::Code)0;
495 if (!uninitialized_static) {
496 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
497 if (is_put || !info.access_flags().is_final()) {
498 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
499 }
500 }
502 cache_entry(thread)->set_field(
503 get_code,
504 put_code,
505 info.klass(),
506 info.field_index(),
507 info.field_offset(),
508 state,
509 info.access_flags().is_final(),
510 info.access_flags().is_volatile()
511 );
512 IRT_END
515 //------------------------------------------------------------------------------------------------------------------------
516 // Synchronization
517 //
518 // The interpreter's synchronization code is factored out so that it can
519 // be shared by method invocation and synchronized blocks.
520 //%note synchronization_3
522 static void trace_locking(Handle& h_locking_obj, bool is_locking) {
523 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking);
524 }
527 //%note monitor_1
528 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
529 #ifdef ASSERT
530 thread->last_frame().interpreter_frame_verify_monitor(elem);
531 #endif
532 if (PrintBiasedLockingStatistics) {
533 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
534 }
535 Handle h_obj(thread, elem->obj());
536 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
537 "must be NULL or an object");
538 if (UseBiasedLocking) {
539 // Retry fast entry if bias is revoked to avoid unnecessary inflation
540 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
541 } else {
542 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
543 }
544 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
545 "must be NULL or an object");
546 #ifdef ASSERT
547 thread->last_frame().interpreter_frame_verify_monitor(elem);
548 #endif
549 IRT_END
552 //%note monitor_1
553 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
554 #ifdef ASSERT
555 thread->last_frame().interpreter_frame_verify_monitor(elem);
556 #endif
557 Handle h_obj(thread, elem->obj());
558 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
559 "must be NULL or an object");
560 if (elem == NULL || h_obj()->is_unlocked()) {
561 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
562 }
563 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
564 // Free entry. This must be done here, since a pending exception might be installed on
565 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
566 elem->set_obj(NULL);
567 #ifdef ASSERT
568 thread->last_frame().interpreter_frame_verify_monitor(elem);
569 #endif
570 IRT_END
573 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
574 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
575 IRT_END
578 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
579 // Returns an illegal exception to install into the current thread. The
580 // pending_exception flag is cleared so normal exception handling does not
581 // trigger. Any current installed exception will be overwritten. This
582 // method will be called during an exception unwind.
584 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
585 Handle exception(thread, thread->vm_result());
586 assert(exception() != NULL, "vm result should be set");
587 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
588 if (!exception->is_a(SystemDictionary::threaddeath_klass())) {
589 exception = get_preinitialized_exception(
590 SystemDictionary::IllegalMonitorStateException_klass(),
591 CATCH);
592 }
593 thread->set_vm_result(exception());
594 IRT_END
597 //------------------------------------------------------------------------------------------------------------------------
598 // Invokes
600 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp))
601 return method->orig_bytecode_at(method->bci_from(bcp));
602 IRT_END
604 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code))
605 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
606 IRT_END
608 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp))
609 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
610 IRT_END
612 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode))
613 // extract receiver from the outgoing argument list if necessary
614 Handle receiver(thread, NULL);
615 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
616 ResourceMark rm(thread);
617 methodHandle m (thread, method(thread));
618 int bci = m->bci_from(bcp(thread));
619 Bytecode_invoke* call = Bytecode_invoke_at(m, bci);
620 symbolHandle signature (thread, call->signature());
621 receiver = Handle(thread,
622 thread->last_frame().interpreter_callee_receiver(signature));
623 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
624 "sanity check");
625 assert(receiver.is_null() ||
626 Universe::heap()->is_in_reserved(receiver->klass()),
627 "sanity check");
628 }
630 // resolve method
631 CallInfo info;
632 constantPoolHandle pool(thread, method(thread)->constants());
634 {
635 JvmtiHideSingleStepping jhss(thread);
636 LinkResolver::resolve_invoke(info, receiver, pool,
637 two_byte_index(thread), bytecode, CHECK);
638 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
639 int retry_count = 0;
640 while (info.resolved_method()->is_old()) {
641 // It is very unlikely that method is redefined more than 100 times
642 // in the middle of resolve. If it is looping here more than 100 times
643 // means then there could be a bug here.
644 guarantee((retry_count++ < 100),
645 "Could not resolve to latest version of redefined method");
646 // method is redefined in the middle of resolve so re-try.
647 LinkResolver::resolve_invoke(info, receiver, pool,
648 two_byte_index(thread), bytecode, CHECK);
649 }
650 }
651 } // end JvmtiHideSingleStepping
653 // check if link resolution caused cpCache to be updated
654 if (already_resolved(thread)) return;
656 if (bytecode == Bytecodes::_invokeinterface) {
658 if (TraceItables && Verbose) {
659 ResourceMark rm(thread);
660 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
661 }
662 if (info.resolved_method()->method_holder() ==
663 SystemDictionary::object_klass()) {
664 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
665 // (see also cpCacheOop.cpp for details)
666 methodHandle rm = info.resolved_method();
667 assert(rm->is_final() || info.has_vtable_index(),
668 "should have been set already");
669 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index());
670 } else {
671 // Setup itable entry
672 int index = klassItable::compute_itable_index(info.resolved_method()());
673 cache_entry(thread)->set_interface_call(info.resolved_method(), index);
674 }
675 } else {
676 cache_entry(thread)->set_method(
677 bytecode,
678 info.resolved_method(),
679 info.vtable_index());
680 }
681 IRT_END
684 //------------------------------------------------------------------------------------------------------------------------
685 // Miscellaneous
688 #ifndef PRODUCT
689 static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci, address branch_bcp) {
690 if (TraceInvocationCounterOverflow) {
691 InvocationCounter* ic = m->invocation_counter();
692 InvocationCounter* bc = m->backedge_counter();
693 ResourceMark rm;
694 const char* msg =
695 branch_bcp == NULL
696 ? "comp-policy cntr ovfl @ %d in entry of "
697 : "comp-policy cntr ovfl @ %d in loop of ";
698 tty->print(msg, bci);
699 m->print_value();
700 tty->cr();
701 ic->print();
702 bc->print();
703 if (ProfileInterpreter) {
704 if (branch_bcp != NULL) {
705 methodDataOop mdo = m->method_data();
706 if (mdo != NULL) {
707 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken();
708 tty->print_cr("back branch count = %d", count);
709 }
710 }
711 }
712 }
713 }
715 static void trace_osr_request(methodHandle method, nmethod* osr, int bci) {
716 if (TraceOnStackReplacement) {
717 ResourceMark rm;
718 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for ");
719 method->print_short_name(tty);
720 tty->print_cr(" at bci %d", bci);
721 }
722 }
723 #endif // !PRODUCT
725 IRT_ENTRY(nmethod*,
726 InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp))
727 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
728 // flag, in case this method triggers classloading which will call into Java.
729 UnlockFlagSaver fs(thread);
731 frame fr = thread->last_frame();
732 assert(fr.is_interpreted_frame(), "must come from interpreter");
733 methodHandle method(thread, fr.interpreter_frame_method());
734 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : 0;
735 const int bci = method->bci_from(fr.interpreter_frame_bcp());
736 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci, branch_bcp);)
738 if (JvmtiExport::can_post_interpreter_events()) {
739 if (thread->is_interp_only_mode()) {
740 // If certain JVMTI events (e.g. frame pop event) are requested then the
741 // thread is forced to remain in interpreted code. This is
742 // implemented partly by a check in the run_compiled_code
743 // section of the interpreter whether we should skip running
744 // compiled code, and partly by skipping OSR compiles for
745 // interpreted-only threads.
746 if (branch_bcp != NULL) {
747 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method);
748 return NULL;
749 }
750 }
751 }
753 if (branch_bcp == NULL) {
754 // when code cache is full, compilation gets switched off, UseCompiler
755 // is set to false
756 if (!method->has_compiled_code() && UseCompiler) {
757 CompilationPolicy::policy()->method_invocation_event(method, CHECK_NULL);
758 } else {
759 // Force counter overflow on method entry, even if no compilation
760 // happened. (The method_invocation_event call does this also.)
761 CompilationPolicy::policy()->reset_counter_for_invocation_event(method);
762 }
763 // compilation at an invocation overflow no longer goes and retries test for
764 // compiled method. We always run the loser of the race as interpreted.
765 // so return NULL
766 return NULL;
767 } else {
768 // counter overflow in a loop => try to do on-stack-replacement
769 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci);
770 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci);)
771 // when code cache is full, we should not compile any more...
772 if (osr_nm == NULL && UseCompiler) {
773 const int branch_bci = method->bci_from(branch_bcp);
774 CompilationPolicy::policy()->method_back_branch_event(method, branch_bci, bci, CHECK_NULL);
775 osr_nm = method->lookup_osr_nmethod_for(bci);
776 }
777 if (osr_nm == NULL) {
778 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method);
779 return NULL;
780 } else {
781 // We may need to do on-stack replacement which requires that no
782 // monitors in the activation are biased because their
783 // BasicObjectLocks will need to migrate during OSR. Force
784 // unbiasing of all monitors in the activation now (even though
785 // the OSR nmethod might be invalidated) because we don't have a
786 // safepoint opportunity later once the migration begins.
787 if (UseBiasedLocking) {
788 ResourceMark rm;
789 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
790 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
791 kptr < fr.interpreter_frame_monitor_begin();
792 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
793 if( kptr->obj() != NULL ) {
794 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
795 }
796 }
797 BiasedLocking::revoke(objects_to_revoke);
798 }
800 return osr_nm;
801 }
802 }
803 IRT_END
805 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp))
806 assert(ProfileInterpreter, "must be profiling interpreter");
807 int bci = method->bci_from(cur_bcp);
808 methodDataOop mdo = method->method_data();
809 if (mdo == NULL) return 0;
810 return mdo->bci_to_di(bci);
811 IRT_END
813 IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp))
814 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
815 // flag, in case this method triggers classloading which will call into Java.
816 UnlockFlagSaver fs(thread);
818 assert(ProfileInterpreter, "must be profiling interpreter");
819 frame fr = thread->last_frame();
820 assert(fr.is_interpreted_frame(), "must come from interpreter");
821 methodHandle method(thread, fr.interpreter_frame_method());
822 int bci = method->bci_from(cur_bcp);
823 methodOopDesc::build_interpreter_method_data(method, THREAD);
824 if (HAS_PENDING_EXCEPTION) {
825 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
826 CLEAR_PENDING_EXCEPTION;
827 // and fall through...
828 }
829 methodDataOop mdo = method->method_data();
830 if (mdo == NULL) return 0;
831 return mdo->bci_to_di(bci);
832 IRT_END
835 #ifdef ASSERT
836 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp))
837 assert(ProfileInterpreter, "must be profiling interpreter");
839 methodDataOop mdo = method->method_data();
840 assert(mdo != NULL, "must not be null");
842 int bci = method->bci_from(bcp);
844 address mdp2 = mdo->bci_to_dp(bci);
845 if (mdp != mdp2) {
846 ResourceMark rm;
847 ResetNoHandleMark rnm; // In a LEAF entry.
848 HandleMark hm;
849 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
850 int current_di = mdo->dp_to_di(mdp);
851 int expected_di = mdo->dp_to_di(mdp2);
852 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
853 int expected_approx_bci = mdo->data_at(expected_di)->bci();
854 int approx_bci = -1;
855 if (current_di >= 0) {
856 approx_bci = mdo->data_at(current_di)->bci();
857 }
858 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
859 mdo->print_on(tty);
860 method->print_codes();
861 }
862 assert(mdp == mdp2, "wrong mdp");
863 IRT_END
864 #endif // ASSERT
866 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
867 assert(ProfileInterpreter, "must be profiling interpreter");
868 ResourceMark rm(thread);
869 HandleMark hm(thread);
870 frame fr = thread->last_frame();
871 assert(fr.is_interpreted_frame(), "must come from interpreter");
872 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data());
874 // Grab a lock to ensure atomic access to setting the return bci and
875 // the displacement. This can block and GC, invalidating all naked oops.
876 MutexLocker ml(RetData_lock);
878 // ProfileData is essentially a wrapper around a derived oop, so we
879 // need to take the lock before making any ProfileData structures.
880 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
881 RetData* rdata = data->as_RetData();
882 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
883 fr.interpreter_frame_set_mdp(new_mdp);
884 IRT_END
887 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
888 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
889 // stack traversal automatically takes care of preserving arguments for invoke, so
890 // this is no longer needed.
892 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
893 // if this is called during a safepoint
895 if (JvmtiExport::should_post_single_step()) {
896 // We are called during regular safepoints and when the VM is
897 // single stepping. If any thread is marked for single stepping,
898 // then we may have JVMTI work to do.
899 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
900 }
901 IRT_END
903 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
904 ConstantPoolCacheEntry *cp_entry))
906 // check the access_flags for the field in the klass
907 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1());
908 typeArrayOop fields = ik->fields();
909 int index = cp_entry->field_index();
910 assert(index < fields->length(), "holders field index is out of range");
911 // bail out if field accesses are not watched
912 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
914 switch(cp_entry->flag_state()) {
915 case btos: // fall through
916 case ctos: // fall through
917 case stos: // fall through
918 case itos: // fall through
919 case ftos: // fall through
920 case ltos: // fall through
921 case dtos: // fall through
922 case atos: break;
923 default: ShouldNotReachHere(); return;
924 }
925 bool is_static = (obj == NULL);
926 HandleMark hm(thread);
928 Handle h_obj;
929 if (!is_static) {
930 // non-static field accessors have an object, but we need a handle
931 h_obj = Handle(thread, obj);
932 }
933 instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1());
934 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static);
935 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
936 IRT_END
938 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
939 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
941 klassOop k = (klassOop)cp_entry->f1();
943 // check the access_flags for the field in the klass
944 instanceKlass* ik = instanceKlass::cast(k);
945 typeArrayOop fields = ik->fields();
946 int index = cp_entry->field_index();
947 assert(index < fields->length(), "holders field index is out of range");
948 // bail out if field modifications are not watched
949 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
951 char sig_type = '\0';
953 switch(cp_entry->flag_state()) {
954 case btos: sig_type = 'Z'; break;
955 case ctos: sig_type = 'C'; break;
956 case stos: sig_type = 'S'; break;
957 case itos: sig_type = 'I'; break;
958 case ftos: sig_type = 'F'; break;
959 case atos: sig_type = 'L'; break;
960 case ltos: sig_type = 'J'; break;
961 case dtos: sig_type = 'D'; break;
962 default: ShouldNotReachHere(); return;
963 }
964 bool is_static = (obj == NULL);
966 HandleMark hm(thread);
967 instanceKlassHandle h_klass(thread, k);
968 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static);
969 jvalue fvalue;
970 #ifdef _LP64
971 fvalue = *value;
972 #else
973 // Long/double values are stored unaligned and also noncontiguously with
974 // tagged stacks. We can't just do a simple assignment even in the non-
975 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
976 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
977 // We assume that the two halves of longs/doubles are stored in interpreter
978 // stack slots in platform-endian order.
979 jlong_accessor u;
980 jint* newval = (jint*)value;
981 u.words[0] = newval[0];
982 u.words[1] = newval[Interpreter::stackElementWords()]; // skip if tag
983 fvalue.j = u.long_value;
984 #endif // _LP64
986 Handle h_obj;
987 if (!is_static) {
988 // non-static field accessors have an object, but we need a handle
989 h_obj = Handle(thread, obj);
990 }
992 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
993 fid, sig_type, &fvalue);
994 IRT_END
996 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
997 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
998 IRT_END
1001 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1002 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1003 IRT_END
1005 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1006 {
1007 return (Interpreter::contains(pc) ? 1 : 0);
1008 }
1009 IRT_END
1012 // Implementation of SignatureHandlerLibrary
1014 address SignatureHandlerLibrary::set_handler_blob() {
1015 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1016 if (handler_blob == NULL) {
1017 return NULL;
1018 }
1019 address handler = handler_blob->instructions_begin();
1020 _handler_blob = handler_blob;
1021 _handler = handler;
1022 return handler;
1023 }
1025 void SignatureHandlerLibrary::initialize() {
1026 if (_fingerprints != NULL) {
1027 return;
1028 }
1029 if (set_handler_blob() == NULL) {
1030 vm_exit_out_of_memory(blob_size, "native signature handlers");
1031 }
1033 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1034 SignatureHandlerLibrary::buffer_size);
1035 _buffer = bb->instructions_begin();
1037 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true);
1038 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true);
1039 }
1041 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1042 address handler = _handler;
1043 int code_size = buffer->pure_code_size();
1044 if (handler + code_size > _handler_blob->instructions_end()) {
1045 // get a new handler blob
1046 handler = set_handler_blob();
1047 }
1048 if (handler != NULL) {
1049 memcpy(handler, buffer->code_begin(), code_size);
1050 pd_set_handler(handler);
1051 ICache::invalidate_range(handler, code_size);
1052 _handler = handler + code_size;
1053 }
1054 return handler;
1055 }
1057 void SignatureHandlerLibrary::add(methodHandle method) {
1058 if (method->signature_handler() == NULL) {
1059 // use slow signature handler if we can't do better
1060 int handler_index = -1;
1061 // check if we can use customized (fast) signature handler
1062 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1063 // use customized signature handler
1064 MutexLocker mu(SignatureHandlerLibrary_lock);
1065 // make sure data structure is initialized
1066 initialize();
1067 // lookup method signature's fingerprint
1068 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1069 handler_index = _fingerprints->find(fingerprint);
1070 // create handler if necessary
1071 if (handler_index < 0) {
1072 ResourceMark rm;
1073 ptrdiff_t align_offset = (address)
1074 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1075 CodeBuffer buffer((address)(_buffer + align_offset),
1076 SignatureHandlerLibrary::buffer_size - align_offset);
1077 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1078 // copy into code heap
1079 address handler = set_handler(&buffer);
1080 if (handler == NULL) {
1081 // use slow signature handler
1082 } else {
1083 // debugging suppport
1084 if (PrintSignatureHandlers) {
1085 tty->cr();
1086 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1087 _handlers->length(),
1088 (method->is_static() ? "static" : "receiver"),
1089 method->name_and_sig_as_C_string(),
1090 fingerprint,
1091 buffer.code_size());
1092 Disassembler::decode(handler, handler + buffer.code_size());
1093 #ifndef PRODUCT
1094 tty->print_cr(" --- associated result handler ---");
1095 address rh_begin = Interpreter::result_handler(method()->result_type());
1096 address rh_end = rh_begin;
1097 while (*(int*)rh_end != 0) {
1098 rh_end += sizeof(int);
1099 }
1100 Disassembler::decode(rh_begin, rh_end);
1101 #endif
1102 }
1103 // add handler to library
1104 _fingerprints->append(fingerprint);
1105 _handlers->append(handler);
1106 // set handler index
1107 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1108 handler_index = _fingerprints->length() - 1;
1109 }
1110 }
1111 } else {
1112 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1113 }
1114 if (handler_index < 0) {
1115 // use generic signature handler
1116 method->set_signature_handler(Interpreter::slow_signature_handler());
1117 } else {
1118 // set handler
1119 method->set_signature_handler(_handlers->at(handler_index));
1120 }
1121 }
1122 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1123 _handlers->find(method->signature_handler()) == _fingerprints->find(Fingerprinter(method).fingerprint()),
1124 "sanity check");
1125 }
1128 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1129 address SignatureHandlerLibrary::_handler = NULL;
1130 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1131 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1132 address SignatureHandlerLibrary::_buffer = NULL;
1135 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method))
1136 methodHandle m(thread, method);
1137 assert(m->is_native(), "sanity check");
1138 // lookup native function entry point if it doesn't exist
1139 bool in_base_library;
1140 if (!m->has_native_function()) {
1141 NativeLookup::lookup(m, in_base_library, CHECK);
1142 }
1143 // make sure signature handler is installed
1144 SignatureHandlerLibrary::add(m);
1145 // The interpreter entry point checks the signature handler first,
1146 // before trying to fetch the native entry point and klass mirror.
1147 // We must set the signature handler last, so that multiple processors
1148 // preparing the same method will be sure to see non-null entry & mirror.
1149 IRT_END
1151 #if defined(IA32) || defined(AMD64)
1152 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1153 if (src_address == dest_address) {
1154 return;
1155 }
1156 ResetNoHandleMark rnm; // In a LEAF entry.
1157 HandleMark hm;
1158 ResourceMark rm;
1159 frame fr = thread->last_frame();
1160 assert(fr.is_interpreted_frame(), "");
1161 jint bci = fr.interpreter_frame_bci();
1162 methodHandle mh(thread, fr.interpreter_frame_method());
1163 Bytecode_invoke* invoke = Bytecode_invoke_at(mh, bci);
1164 ArgumentSizeComputer asc(invoke->signature());
1165 int size_of_arguments = (asc.size() + (invoke->is_invokestatic() ? 0 : 1)); // receiver
1166 Copy::conjoint_bytes(src_address, dest_address,
1167 size_of_arguments * Interpreter::stackElementSize());
1168 IRT_END
1169 #endif