1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "gc_interface/collectedHeap.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "interpreter/templateTable.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/constantPool.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/methodData.hpp"
40 #include "oops/objArrayKlass.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/symbol.hpp"
43 #include "prims/jvmtiExport.hpp"
44 #include "prims/nativeLookup.hpp"
45 #include "runtime/biasedLocking.hpp"
46 #include "runtime/compilationPolicy.hpp"
47 #include "runtime/deoptimization.hpp"
48 #include "runtime/fieldDescriptor.hpp"
49 #include "runtime/handles.inline.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/jfieldIDWorkaround.hpp"
53 #include "runtime/osThread.hpp"
54 #include "runtime/sharedRuntime.hpp"
55 #include "runtime/stubRoutines.hpp"
56 #include "runtime/synchronizer.hpp"
57 #include "runtime/threadCritical.hpp"
58 #include "utilities/events.hpp"
59 #ifdef TARGET_ARCH_x86
60 # include "vm_version_x86.hpp"
61 #endif
62 #ifdef TARGET_ARCH_sparc
63 # include "vm_version_sparc.hpp"
64 #endif
65 #ifdef TARGET_ARCH_zero
66 # include "vm_version_zero.hpp"
67 #endif
68 #ifdef TARGET_ARCH_arm
69 # include "vm_version_arm.hpp"
70 #endif
71 #ifdef TARGET_ARCH_ppc
72 # include "vm_version_ppc.hpp"
73 #endif
74 #ifdef COMPILER2
75 #include "opto/runtime.hpp"
76 #endif
77
78 class UnlockFlagSaver {
79 private:
80 JavaThread* _thread;
81 bool _do_not_unlock;
82 public:
83 UnlockFlagSaver(JavaThread* t) {
84 _thread = t;
85 _do_not_unlock = t->do_not_unlock_if_synchronized();
86 t->set_do_not_unlock_if_synchronized(false);
87 }
88 ~UnlockFlagSaver() {
89 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
90 }
91 };
92
93 //------------------------------------------------------------------------------------------------------------------------
94 // State accessors
95
96 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
97 last_frame(thread).interpreter_frame_set_bcp(bcp);
98 if (ProfileInterpreter) {
99 // ProfileTraps uses MDOs independently of ProfileInterpreter.
100 // That is why we must check both ProfileInterpreter and mdo != NULL.
101 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
102 if (mdo != NULL) {
103 NEEDS_CLEANUP;
104 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
105 }
106 }
107 }
108
109 //------------------------------------------------------------------------------------------------------------------------
110 // Constants
111
112
113 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
114 // access constant pool
115 ConstantPool* pool = method(thread)->constants();
116 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
117 constantTag tag = pool->tag_at(index);
118
119 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
120 Klass* klass = pool->klass_at(index, CHECK);
121 oop java_class = klass->java_mirror();
122 thread->set_vm_result(java_class);
123 IRT_END
124
125 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
126 assert(bytecode == Bytecodes::_fast_aldc ||
127 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
128 ResourceMark rm(thread);
129 methodHandle m (thread, method(thread));
130 Bytecode_loadconstant ldc(m, bci(thread));
131 oop result = ldc.resolve_constant(CHECK);
132 #ifdef ASSERT
133 {
134 // The bytecode wrappers aren't GC-safe so construct a new one
135 Bytecode_loadconstant ldc2(m, bci(thread));
136 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
137 assert(result == coop, "expected result for assembly code");
138 }
139 #endif
140 thread->set_vm_result(result);
141 }
142 IRT_END
143
144
145 //------------------------------------------------------------------------------------------------------------------------
146 // Allocation
147
148 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
149 Klass* k_oop = pool->klass_at(index, CHECK);
150 instanceKlassHandle klass (THREAD, k_oop);
151
152 // Make sure we are not instantiating an abstract klass
153 klass->check_valid_for_instantiation(true, CHECK);
154
155 // Make sure klass is initialized
156 klass->initialize(CHECK);
157
158 // At this point the class may not be fully initialized
159 // because of recursive initialization. If it is fully
160 // initialized & has_finalized is not set, we rewrite
161 // it into its fast version (Note: no locking is needed
162 // here since this is an atomic byte write and can be
163 // done more than once).
164 //
165 // Note: In case of classes with has_finalized we don't
166 // rewrite since that saves us an extra check in
167 // the fast version which then would call the
168 // slow version anyway (and do a call back into
169 // Java).
170 // If we have a breakpoint, then we don't rewrite
171 // because the _breakpoint bytecode would be lost.
172 oop obj = klass->allocate_instance(CHECK);
173 thread->set_vm_result(obj);
174 IRT_END
175
176
177 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
178 oop obj = oopFactory::new_typeArray(type, size, CHECK);
179 thread->set_vm_result(obj);
180 IRT_END
181
182
183 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
184 // Note: no oopHandle for pool & klass needed since they are not used
185 // anymore after new_objArray() and no GC can happen before.
186 // (This may have to change if this code changes!)
187 Klass* klass = pool->klass_at(index, CHECK);
188 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
189 thread->set_vm_result(obj);
190 IRT_END
191
192
193 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
194 // We may want to pass in more arguments - could make this slightly faster
195 ConstantPool* constants = method(thread)->constants();
196 int i = get_index_u2(thread, Bytecodes::_multianewarray);
197 Klass* klass = constants->klass_at(i, CHECK);
198 int nof_dims = number_of_dimensions(thread);
199 assert(klass->is_klass(), "not a class");
200 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
201
202 // We must create an array of jints to pass to multi_allocate.
203 ResourceMark rm(thread);
204 const int small_dims = 10;
205 jint dim_array[small_dims];
206 jint *dims = &dim_array[0];
207 if (nof_dims > small_dims) {
208 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
209 }
210 for (int index = 0; index < nof_dims; index++) {
211 // offset from first_size_address is addressed as local[index]
212 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
213 dims[index] = first_size_address[n];
214 }
215 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
216 thread->set_vm_result(obj);
217 IRT_END
218
219
220 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
221 assert(obj->is_oop(), "must be a valid oop");
222 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
223 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
224 IRT_END
225
226
227 // Quicken instance-of and check-cast bytecodes
228 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
229 // Force resolving; quicken the bytecode
230 int which = get_index_u2(thread, Bytecodes::_checkcast);
231 ConstantPool* cpool = method(thread)->constants();
232 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
233 // program we might have seen an unquick'd bytecode in the interpreter but have another
234 // thread quicken the bytecode before we get here.
235 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
236 Klass* klass = cpool->klass_at(which, CHECK);
237 thread->set_vm_result_2(klass);
238 IRT_END
239
240
241 //------------------------------------------------------------------------------------------------------------------------
242 // Exceptions
243
244 // Assume the compiler is (or will be) interested in this event.
245 // If necessary, create an MDO to hold the information, and record it.
246 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
247 assert(ProfileTraps, "call me only if profiling");
248 methodHandle trap_method(thread, method(thread));
249
250 if (trap_method.not_null()) {
251 MethodData* trap_mdo = trap_method->method_data();
252 if (trap_mdo == NULL) {
253 Method::build_interpreter_method_data(trap_method, THREAD);
254 if (HAS_PENDING_EXCEPTION) {
255 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
256 CLEAR_PENDING_EXCEPTION;
257 }
258 trap_mdo = trap_method->method_data();
259 // and fall through...
260 }
261 if (trap_mdo != NULL) {
262 // Update per-method count of trap events. The interpreter
263 // is updating the MDO to simulate the effect of compiler traps.
264 int trap_bci = trap_method->bci_from(bcp(thread));
265 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
266 }
267 }
268 }
269
270 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
271 // get klass
272 InstanceKlass* klass = InstanceKlass::cast(k);
273 assert(klass->is_initialized(),
274 "this klass should have been initialized during VM initialization");
275 // create instance - do not call constructor since we may have no
276 // (java) stack space left (should assert constructor is empty)
277 Handle exception;
278 oop exception_oop = klass->allocate_instance(CHECK_(exception));
279 exception = Handle(THREAD, exception_oop);
280 if (StackTraceInThrowable) {
281 java_lang_Throwable::fill_in_stack_trace(exception);
282 }
283 return exception;
284 }
285
286 // Special handling for stack overflow: since we don't have any (java) stack
287 // space left we use the pre-allocated & pre-initialized StackOverflowError
288 // klass to create an stack overflow error instance. We do not call its
289 // constructor for the same reason (it is empty, anyway).
290 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
291 Handle exception = get_preinitialized_exception(
292 SystemDictionary::StackOverflowError_klass(),
293 CHECK);
294 THROW_HANDLE(exception);
295 IRT_END
296
297
298 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
299 // lookup exception klass
300 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
301 if (ProfileTraps) {
302 if (s == vmSymbols::java_lang_ArithmeticException()) {
303 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
304 } else if (s == vmSymbols::java_lang_NullPointerException()) {
305 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
306 }
307 }
308 // create exception
309 Handle exception = Exceptions::new_exception(thread, s, message);
310 thread->set_vm_result(exception());
311 IRT_END
312
313
314 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
315 ResourceMark rm(thread);
316 const char* klass_name = obj->klass()->external_name();
317 // lookup exception klass
318 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
319 if (ProfileTraps) {
320 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
321 }
322 // create exception, with klass name as detail message
323 Handle exception = Exceptions::new_exception(thread, s, klass_name);
324 thread->set_vm_result(exception());
325 IRT_END
326
327
328 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
329 char message[jintAsStringSize];
330 // lookup exception klass
331 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
332 if (ProfileTraps) {
333 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
334 }
335 // create exception
336 sprintf(message, "%d", index);
337 THROW_MSG(s, message);
338 IRT_END
339
340 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
341 JavaThread* thread, oopDesc* obj))
342
343 ResourceMark rm(thread);
344 char* message = SharedRuntime::generate_class_cast_message(
345 thread, obj->klass()->external_name());
346
347 if (ProfileTraps) {
348 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
349 }
350
351 // create exception
352 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
353 IRT_END
354
355 // exception_handler_for_exception(...) returns the continuation address,
356 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
357 // The exception oop is returned to make sure it is preserved over GC (it
358 // is only on the stack if the exception was thrown explicitly via athrow).
359 // During this operation, the expression stack contains the values for the
360 // bci where the exception happened. If the exception was propagated back
361 // from a call, the expression stack contains the values for the bci at the
362 // invoke w/o arguments (i.e., as if one were inside the call).
363 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
364
365 Handle h_exception(thread, exception);
366 methodHandle h_method (thread, method(thread));
367 constantPoolHandle h_constants(thread, h_method->constants());
368 bool should_repeat;
369 int handler_bci;
370 int current_bci = bci(thread);
371
372 // Need to do this check first since when _do_not_unlock_if_synchronized
373 // is set, we don't want to trigger any classloading which may make calls
374 // into java, or surprisingly find a matching exception handler for bci 0
375 // since at this moment the method hasn't been "officially" entered yet.
376 if (thread->do_not_unlock_if_synchronized()) {
377 ResourceMark rm;
378 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
379 thread->set_vm_result(exception);
380 #ifdef CC_INTERP
381 return (address) -1;
382 #else
383 return Interpreter::remove_activation_entry();
384 #endif
385 }
386
387 do {
388 should_repeat = false;
389
390 // assertions
391 #ifdef ASSERT
392 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
393 assert(h_exception->is_oop(), "just checking");
394 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
395 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
396 if (ExitVMOnVerifyError) vm_exit(-1);
397 ShouldNotReachHere();
398 }
399 #endif
400
401 // tracing
402 if (TraceExceptions) {
403 ttyLocker ttyl;
404 ResourceMark rm(thread);
405 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception());
406 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
407 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
408 }
409 // Don't go paging in something which won't be used.
410 // else if (extable->length() == 0) {
411 // // disabled for now - interpreter is not using shortcut yet
412 // // (shortcut is not to call runtime if we have no exception handlers)
413 // // warning("performance bug: should not call runtime if method has no exception handlers");
414 // }
415 // for AbortVMOnException flag
416 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
417
418 // exception handler lookup
419 KlassHandle h_klass(THREAD, h_exception->klass());
420 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
421 if (HAS_PENDING_EXCEPTION) {
422 // We threw an exception while trying to find the exception handler.
423 // Transfer the new exception to the exception handle which will
424 // be set into thread local storage, and do another lookup for an
425 // exception handler for this exception, this time starting at the
426 // BCI of the exception handler which caused the exception to be
427 // thrown (bug 4307310).
428 h_exception = Handle(THREAD, PENDING_EXCEPTION);
429 CLEAR_PENDING_EXCEPTION;
430 if (handler_bci >= 0) {
431 current_bci = handler_bci;
432 should_repeat = true;
433 }
434 }
435 } while (should_repeat == true);
436
437 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
438 // time throw or a stack unwinding throw and accordingly notify the debugger
439 if (JvmtiExport::can_post_on_exceptions()) {
440 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
441 }
442
443 #ifdef CC_INTERP
444 address continuation = (address)(intptr_t) handler_bci;
445 #else
446 address continuation = NULL;
447 #endif
448 address handler_pc = NULL;
449 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
450 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
451 // handler in this method, or (b) after a stack overflow there is not yet
452 // enough stack space available to reprotect the stack.
453 #ifndef CC_INTERP
454 continuation = Interpreter::remove_activation_entry();
455 #endif
456 // Count this for compilation purposes
457 h_method->interpreter_throwout_increment(THREAD);
458 } else {
459 // handler in this method => change bci/bcp to handler bci/bcp and continue there
460 handler_pc = h_method->code_base() + handler_bci;
461 #ifndef CC_INTERP
462 set_bcp_and_mdp(handler_pc, thread);
463 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
464 #endif
465 }
466 // notify debugger of an exception catch
467 // (this is good for exceptions caught in native methods as well)
468 if (JvmtiExport::can_post_on_exceptions()) {
469 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
470 }
471
472 thread->set_vm_result(h_exception());
473 return continuation;
474 IRT_END
475
476
477 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
478 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
479 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
480 IRT_END
481
482
483 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
484 THROW(vmSymbols::java_lang_AbstractMethodError());
485 IRT_END
486
487
488 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
489 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
490 IRT_END
491
492
493 //------------------------------------------------------------------------------------------------------------------------
494 // Fields
495 //
496
497 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
498 // resolve field
499 fieldDescriptor info;
500 constantPoolHandle pool(thread, method(thread)->constants());
501 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic);
502 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
503
504 {
505 JvmtiHideSingleStepping jhss(thread);
506 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
507 bytecode, CHECK);
508 } // end JvmtiHideSingleStepping
509
510 // check if link resolution caused cpCache to be updated
511 if (already_resolved(thread)) return;
512
513 // compute auxiliary field attributes
514 TosState state = as_TosState(info.field_type());
515
516 // We need to delay resolving put instructions on final fields
517 // until we actually invoke one. This is required so we throw
518 // exceptions at the correct place. If we do not resolve completely
519 // in the current pass, leaving the put_code set to zero will
520 // cause the next put instruction to reresolve.
521 Bytecodes::Code put_code = (Bytecodes::Code)0;
522
523 // We also need to delay resolving getstatic instructions until the
524 // class is intitialized. This is required so that access to the static
525 // field will call the initialization function every time until the class
526 // is completely initialized ala. in 2.17.5 in JVM Specification.
527 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
528 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
529 !klass->is_initialized());
530 Bytecodes::Code get_code = (Bytecodes::Code)0;
531
532 if (!uninitialized_static) {
533 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
534 if (is_put || !info.access_flags().is_final()) {
535 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
536 }
537 }
538
539 cache_entry(thread)->set_field(
540 get_code,
541 put_code,
542 info.field_holder(),
543 info.index(),
544 info.offset(),
545 state,
546 info.access_flags().is_final(),
547 info.access_flags().is_volatile(),
548 pool->pool_holder()
549 );
550 IRT_END
551
552
553 //------------------------------------------------------------------------------------------------------------------------
554 // Synchronization
555 //
556 // The interpreter's synchronization code is factored out so that it can
557 // be shared by method invocation and synchronized blocks.
558 //%note synchronization_3
559
560 //%note monitor_1
561 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
562 #ifdef ASSERT
563 thread->last_frame().interpreter_frame_verify_monitor(elem);
564 #endif
565 if (PrintBiasedLockingStatistics) {
566 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
567 }
568 Handle h_obj(thread, elem->obj());
569 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
570 "must be NULL or an object");
571 if (UseBiasedLocking) {
572 // Retry fast entry if bias is revoked to avoid unnecessary inflation
573 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
574 } else {
575 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
576 }
577 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
578 "must be NULL or an object");
579 #ifdef ASSERT
580 thread->last_frame().interpreter_frame_verify_monitor(elem);
581 #endif
582 IRT_END
583
584
585 //%note monitor_1
586 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
587 #ifdef ASSERT
588 thread->last_frame().interpreter_frame_verify_monitor(elem);
589 #endif
590 Handle h_obj(thread, elem->obj());
591 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
592 "must be NULL or an object");
593 if (elem == NULL || h_obj()->is_unlocked()) {
594 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
595 }
596 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
597 // Free entry. This must be done here, since a pending exception might be installed on
598 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
599 elem->set_obj(NULL);
600 #ifdef ASSERT
601 thread->last_frame().interpreter_frame_verify_monitor(elem);
602 #endif
603 IRT_END
604
605
606 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
607 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
608 IRT_END
609
610
611 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
612 // Returns an illegal exception to install into the current thread. The
613 // pending_exception flag is cleared so normal exception handling does not
614 // trigger. Any current installed exception will be overwritten. This
615 // method will be called during an exception unwind.
616
617 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
618 Handle exception(thread, thread->vm_result());
619 assert(exception() != NULL, "vm result should be set");
620 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
621 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
622 exception = get_preinitialized_exception(
623 SystemDictionary::IllegalMonitorStateException_klass(),
624 CATCH);
625 }
626 thread->set_vm_result(exception());
627 IRT_END
628
629
630 //------------------------------------------------------------------------------------------------------------------------
631 // Invokes
632
633 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
634 return method->orig_bytecode_at(method->bci_from(bcp));
635 IRT_END
636
637 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
638 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
639 IRT_END
640
641 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
642 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
643 IRT_END
644
645 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) {
646 // extract receiver from the outgoing argument list if necessary
647 Handle receiver(thread, NULL);
648 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
649 ResourceMark rm(thread);
650 methodHandle m (thread, method(thread));
651 Bytecode_invoke call(m, bci(thread));
652 Symbol* signature = call.signature();
653 receiver = Handle(thread,
654 thread->last_frame().interpreter_callee_receiver(signature));
655 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
656 "sanity check");
657 assert(receiver.is_null() ||
658 !Universe::heap()->is_in_reserved(receiver->klass()),
659 "sanity check");
660 }
661
662 // resolve method
663 CallInfo info;
664 constantPoolHandle pool(thread, method(thread)->constants());
665
666 {
667 JvmtiHideSingleStepping jhss(thread);
668 LinkResolver::resolve_invoke(info, receiver, pool,
669 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
670 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
671 int retry_count = 0;
672 while (info.resolved_method()->is_old()) {
673 // It is very unlikely that method is redefined more than 100 times
674 // in the middle of resolve. If it is looping here more than 100 times
675 // means then there could be a bug here.
676 guarantee((retry_count++ < 100),
677 "Could not resolve to latest version of redefined method");
678 // method is redefined in the middle of resolve so re-try.
679 LinkResolver::resolve_invoke(info, receiver, pool,
680 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
681 }
682 }
683 } // end JvmtiHideSingleStepping
684
685 // check if link resolution caused cpCache to be updated
686 if (already_resolved(thread)) return;
687
688 if (bytecode == Bytecodes::_invokeinterface) {
689 if (TraceItables && Verbose) {
690 ResourceMark rm(thread);
691 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
692 }
693 }
694 #ifdef ASSERT
695 if (bytecode == Bytecodes::_invokeinterface) {
696 if (info.resolved_method()->method_holder() ==
697 SystemDictionary::Object_klass()) {
698 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
699 // (see also CallInfo::set_interface for details)
700 assert(info.call_kind() == CallInfo::vtable_call ||
701 info.call_kind() == CallInfo::direct_call, "");
702 methodHandle rm = info.resolved_method();
703 assert(rm->is_final() || info.has_vtable_index(),
704 "should have been set already");
705 } else if (!info.resolved_method()->has_itable_index()) {
706 // Resolved something like CharSequence.toString. Use vtable not itable.
707 assert(info.call_kind() != CallInfo::itable_call, "");
708 } else {
709 // Setup itable entry
710 assert(info.call_kind() == CallInfo::itable_call, "");
711 int index = info.resolved_method()->itable_index();
712 assert(info.itable_index() == index, "");
713 }
714 } else {
715 assert(info.call_kind() == CallInfo::direct_call ||
716 info.call_kind() == CallInfo::vtable_call, "");
717 }
718 #endif
719 switch (info.call_kind()) {
720 case CallInfo::direct_call:
721 cache_entry(thread)->set_direct_call(
722 bytecode,
723 info.resolved_method());
724 break;
725 case CallInfo::vtable_call:
726 cache_entry(thread)->set_vtable_call(
727 bytecode,
728 info.resolved_method(),
729 info.vtable_index());
730 break;
731 case CallInfo::itable_call:
732 cache_entry(thread)->set_itable_call(
733 bytecode,
734 info.resolved_method(),
735 info.itable_index());
736 break;
737 default: ShouldNotReachHere();
738 }
739 }
740 IRT_END
741
742
743 // First time execution: Resolve symbols, create a permanent MethodType object.
744 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) {
745 assert(EnableInvokeDynamic, "");
746 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
747
748 // resolve method
749 CallInfo info;
750 constantPoolHandle pool(thread, method(thread)->constants());
751
752 {
753 JvmtiHideSingleStepping jhss(thread);
754 LinkResolver::resolve_invoke(info, Handle(), pool,
755 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
756 } // end JvmtiHideSingleStepping
757
758 cache_entry(thread)->set_method_handle(pool, info);
759 }
760 IRT_END
761
762
763 // First time execution: Resolve symbols, create a permanent CallSite object.
764 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
765 assert(EnableInvokeDynamic, "");
766 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
767
768 //TO DO: consider passing BCI to Java.
769 // int caller_bci = method(thread)->bci_from(bcp(thread));
770
771 // resolve method
772 CallInfo info;
773 constantPoolHandle pool(thread, method(thread)->constants());
774 int index = get_index_u4(thread, bytecode);
775 {
776 JvmtiHideSingleStepping jhss(thread);
777 LinkResolver::resolve_invoke(info, Handle(), pool,
778 index, bytecode, CHECK);
779 } // end JvmtiHideSingleStepping
780
781 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
782 cp_cache_entry->set_dynamic_call(pool, info);
783 }
784 IRT_END
785
786
787 //------------------------------------------------------------------------------------------------------------------------
788 // Miscellaneous
789
790
791 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
792 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
793 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
794 if (branch_bcp != NULL && nm != NULL) {
795 // This was a successful request for an OSR nmethod. Because
796 // frequency_counter_overflow_inner ends with a safepoint check,
797 // nm could have been unloaded so look it up again. It's unsafe
798 // to examine nm directly since it might have been freed and used
799 // for something else.
800 frame fr = thread->last_frame();
801 Method* method = fr.interpreter_frame_method();
802 int bci = method->bci_from(fr.interpreter_frame_bcp());
803 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
804 }
805 #ifndef PRODUCT
806 if (TraceOnStackReplacement) {
807 if (nm != NULL) {
808 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
809 nm->print();
810 }
811 }
812 #endif
813 return nm;
814 }
815
816 IRT_ENTRY(nmethod*,
817 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
818 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
819 // flag, in case this method triggers classloading which will call into Java.
820 UnlockFlagSaver fs(thread);
821
822 frame fr = thread->last_frame();
823 assert(fr.is_interpreted_frame(), "must come from interpreter");
824 methodHandle method(thread, fr.interpreter_frame_method());
825 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
826 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
827
828 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
829 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
830 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
831
832 if (osr_nm != NULL) {
833 // We may need to do on-stack replacement which requires that no
834 // monitors in the activation are biased because their
835 // BasicObjectLocks will need to migrate during OSR. Force
836 // unbiasing of all monitors in the activation now (even though
837 // the OSR nmethod might be invalidated) because we don't have a
838 // safepoint opportunity later once the migration begins.
839 if (UseBiasedLocking) {
840 ResourceMark rm;
841 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
842 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
843 kptr < fr.interpreter_frame_monitor_begin();
844 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
845 if( kptr->obj() != NULL ) {
846 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
847 }
848 }
849 BiasedLocking::revoke(objects_to_revoke);
850 }
851 }
852 return osr_nm;
853 IRT_END
854
855 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
856 assert(ProfileInterpreter, "must be profiling interpreter");
857 int bci = method->bci_from(cur_bcp);
858 MethodData* mdo = method->method_data();
859 if (mdo == NULL) return 0;
860 return mdo->bci_to_di(bci);
861 IRT_END
862
863 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
864 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
865 // flag, in case this method triggers classloading which will call into Java.
866 UnlockFlagSaver fs(thread);
867
868 assert(ProfileInterpreter, "must be profiling interpreter");
869 frame fr = thread->last_frame();
870 assert(fr.is_interpreted_frame(), "must come from interpreter");
871 methodHandle method(thread, fr.interpreter_frame_method());
872 Method::build_interpreter_method_data(method, THREAD);
873 if (HAS_PENDING_EXCEPTION) {
874 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
875 CLEAR_PENDING_EXCEPTION;
876 // and fall through...
877 }
878 IRT_END
879
880
881 #ifdef ASSERT
882 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
883 assert(ProfileInterpreter, "must be profiling interpreter");
884
885 MethodData* mdo = method->method_data();
886 assert(mdo != NULL, "must not be null");
887
888 int bci = method->bci_from(bcp);
889
890 address mdp2 = mdo->bci_to_dp(bci);
891 if (mdp != mdp2) {
892 ResourceMark rm;
893 ResetNoHandleMark rnm; // In a LEAF entry.
894 HandleMark hm;
895 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
896 int current_di = mdo->dp_to_di(mdp);
897 int expected_di = mdo->dp_to_di(mdp2);
898 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
899 int expected_approx_bci = mdo->data_at(expected_di)->bci();
900 int approx_bci = -1;
901 if (current_di >= 0) {
902 approx_bci = mdo->data_at(current_di)->bci();
903 }
904 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
905 mdo->print_on(tty);
906 method->print_codes();
907 }
908 assert(mdp == mdp2, "wrong mdp");
909 IRT_END
910 #endif // ASSERT
911
912 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
913 assert(ProfileInterpreter, "must be profiling interpreter");
914 ResourceMark rm(thread);
915 HandleMark hm(thread);
916 frame fr = thread->last_frame();
917 assert(fr.is_interpreted_frame(), "must come from interpreter");
918 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
919
920 // Grab a lock to ensure atomic access to setting the return bci and
921 // the displacement. This can block and GC, invalidating all naked oops.
922 MutexLocker ml(RetData_lock);
923
924 // ProfileData is essentially a wrapper around a derived oop, so we
925 // need to take the lock before making any ProfileData structures.
926 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
927 RetData* rdata = data->as_RetData();
928 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
929 fr.interpreter_frame_set_mdp(new_mdp);
930 IRT_END
931
932 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
933 MethodCounters* mcs = Method::build_method_counters(m, thread);
934 if (HAS_PENDING_EXCEPTION) {
935 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
936 CLEAR_PENDING_EXCEPTION;
937 }
938 return mcs;
939 IRT_END
940
941
942 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
943 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
944 // stack traversal automatically takes care of preserving arguments for invoke, so
945 // this is no longer needed.
946
947 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
948 // if this is called during a safepoint
949
950 if (JvmtiExport::should_post_single_step()) {
951 // We are called during regular safepoints and when the VM is
952 // single stepping. If any thread is marked for single stepping,
953 // then we may have JVMTI work to do.
954 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
955 }
956 IRT_END
957
958 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
959 ConstantPoolCacheEntry *cp_entry))
960
961 // check the access_flags for the field in the klass
962
963 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
964 int index = cp_entry->field_index();
965 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
966
967 switch(cp_entry->flag_state()) {
968 case btos: // fall through
969 case ctos: // fall through
970 case stos: // fall through
971 case itos: // fall through
972 case ftos: // fall through
973 case ltos: // fall through
974 case dtos: // fall through
975 case atos: break;
976 default: ShouldNotReachHere(); return;
977 }
978 bool is_static = (obj == NULL);
979 HandleMark hm(thread);
980
981 Handle h_obj;
982 if (!is_static) {
983 // non-static field accessors have an object, but we need a handle
984 h_obj = Handle(thread, obj);
985 }
986 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
987 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
988 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
989 IRT_END
990
991 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
992 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
993
994 Klass* k = (Klass*)cp_entry->f1_as_klass();
995
996 // check the access_flags for the field in the klass
997 InstanceKlass* ik = InstanceKlass::cast(k);
998 int index = cp_entry->field_index();
999 // bail out if field modifications are not watched
1000 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1001
1002 char sig_type = '\0';
1003
1004 switch(cp_entry->flag_state()) {
1005 case btos: sig_type = 'Z'; break;
1006 case ctos: sig_type = 'C'; break;
1007 case stos: sig_type = 'S'; break;
1008 case itos: sig_type = 'I'; break;
1009 case ftos: sig_type = 'F'; break;
1010 case atos: sig_type = 'L'; break;
1011 case ltos: sig_type = 'J'; break;
1012 case dtos: sig_type = 'D'; break;
1013 default: ShouldNotReachHere(); return;
1014 }
1015 bool is_static = (obj == NULL);
1016
1017 HandleMark hm(thread);
1018 instanceKlassHandle h_klass(thread, k);
1019 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1020 jvalue fvalue;
1021 #ifdef _LP64
1022 fvalue = *value;
1023 #else
1024 // Long/double values are stored unaligned and also noncontiguously with
1025 // tagged stacks. We can't just do a simple assignment even in the non-
1026 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1027 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1028 // We assume that the two halves of longs/doubles are stored in interpreter
1029 // stack slots in platform-endian order.
1030 jlong_accessor u;
1031 jint* newval = (jint*)value;
1032 u.words[0] = newval[0];
1033 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1034 fvalue.j = u.long_value;
1035 #endif // _LP64
1036
1037 Handle h_obj;
1038 if (!is_static) {
1039 // non-static field accessors have an object, but we need a handle
1040 h_obj = Handle(thread, obj);
1041 }
1042
1043 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1044 fid, sig_type, &fvalue);
1045 IRT_END
1046
1047 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1048 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1049 IRT_END
1050
1051
1052 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1053 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1054 IRT_END
1055
1056 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1057 {
1058 return (Interpreter::contains(pc) ? 1 : 0);
1059 }
1060 IRT_END
1061
1062
1063 // Implementation of SignatureHandlerLibrary
1064
1065 address SignatureHandlerLibrary::set_handler_blob() {
1066 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1067 if (handler_blob == NULL) {
1068 return NULL;
1069 }
1070 address handler = handler_blob->code_begin();
1071 _handler_blob = handler_blob;
1072 _handler = handler;
1073 return handler;
1074 }
1075
1076 void SignatureHandlerLibrary::initialize() {
1077 if (_fingerprints != NULL) {
1078 return;
1079 }
1080 if (set_handler_blob() == NULL) {
1081 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1082 }
1083
1084 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1085 SignatureHandlerLibrary::buffer_size);
1086 _buffer = bb->code_begin();
1087
1088 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1089 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1090 }
1091
1092 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1093 address handler = _handler;
1094 int insts_size = buffer->pure_insts_size();
1095 if (handler + insts_size > _handler_blob->code_end()) {
1096 // get a new handler blob
1097 handler = set_handler_blob();
1098 }
1099 if (handler != NULL) {
1100 memcpy(handler, buffer->insts_begin(), insts_size);
1101 pd_set_handler(handler);
1102 ICache::invalidate_range(handler, insts_size);
1103 _handler = handler + insts_size;
1104 }
1105 return handler;
1106 }
1107
1108 void SignatureHandlerLibrary::add(methodHandle method) {
1109 if (method->signature_handler() == NULL) {
1110 // use slow signature handler if we can't do better
1111 int handler_index = -1;
1112 // check if we can use customized (fast) signature handler
1113 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1114 // use customized signature handler
1115 MutexLocker mu(SignatureHandlerLibrary_lock);
1116 // make sure data structure is initialized
1117 initialize();
1118 // lookup method signature's fingerprint
1119 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1120 handler_index = _fingerprints->find(fingerprint);
1121 // create handler if necessary
1122 if (handler_index < 0) {
1123 ResourceMark rm;
1124 ptrdiff_t align_offset = (address)
1125 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1126 CodeBuffer buffer((address)(_buffer + align_offset),
1127 SignatureHandlerLibrary::buffer_size - align_offset);
1128 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1129 // copy into code heap
1130 address handler = set_handler(&buffer);
1131 if (handler == NULL) {
1132 // use slow signature handler
1133 } else {
1134 // debugging suppport
1135 if (PrintSignatureHandlers) {
1136 tty->cr();
1137 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1138 _handlers->length(),
1139 (method->is_static() ? "static" : "receiver"),
1140 method->name_and_sig_as_C_string(),
1141 fingerprint,
1142 buffer.insts_size());
1143 Disassembler::decode(handler, handler + buffer.insts_size());
1144 #ifndef PRODUCT
1145 tty->print_cr(" --- associated result handler ---");
1146 address rh_begin = Interpreter::result_handler(method()->result_type());
1147 address rh_end = rh_begin;
1148 while (*(int*)rh_end != 0) {
1149 rh_end += sizeof(int);
1150 }
1151 Disassembler::decode(rh_begin, rh_end);
1152 #endif
1153 }
1154 // add handler to library
1155 _fingerprints->append(fingerprint);
1156 _handlers->append(handler);
1157 // set handler index
1158 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1159 handler_index = _fingerprints->length() - 1;
1160 }
1161 }
1162 // Set handler under SignatureHandlerLibrary_lock
1163 if (handler_index < 0) {
1164 // use generic signature handler
1165 method->set_signature_handler(Interpreter::slow_signature_handler());
1166 } else {
1167 // set handler
1168 method->set_signature_handler(_handlers->at(handler_index));
1169 }
1170 } else {
1171 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1172 // use generic signature handler
1173 method->set_signature_handler(Interpreter::slow_signature_handler());
1174 }
1175 }
1176 #ifdef ASSERT
1177 int handler_index = -1;
1178 int fingerprint_index = -2;
1179 {
1180 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1181 // in any way if accessed from multiple threads. To avoid races with another
1182 // thread which may change the arrays in the above, mutex protected block, we
1183 // have to protect this read access here with the same mutex as well!
1184 MutexLocker mu(SignatureHandlerLibrary_lock);
1185 if (_handlers != NULL) {
1186 handler_index = _handlers->find(method->signature_handler());
1187 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1188 }
1189 }
1190 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1191 handler_index == fingerprint_index, "sanity check");
1192 #endif // ASSERT
1193 }
1194
1195
1196 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1197 address SignatureHandlerLibrary::_handler = NULL;
1198 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1199 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1200 address SignatureHandlerLibrary::_buffer = NULL;
1201
1202
1203 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1204 methodHandle m(thread, method);
1205 assert(m->is_native(), "sanity check");
1206 // lookup native function entry point if it doesn't exist
1207 bool in_base_library;
1208 if (!m->has_native_function()) {
1209 NativeLookup::lookup(m, in_base_library, CHECK);
1210 }
1211 // make sure signature handler is installed
1212 SignatureHandlerLibrary::add(m);
1213 // The interpreter entry point checks the signature handler first,
1214 // before trying to fetch the native entry point and klass mirror.
1215 // We must set the signature handler last, so that multiple processors
1216 // preparing the same method will be sure to see non-null entry & mirror.
1217 IRT_END
1218
1219 #if defined(IA32) || defined(AMD64) || defined(ARM)
1220 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1221 if (src_address == dest_address) {
1222 return;
1223 }
1224 ResetNoHandleMark rnm; // In a LEAF entry.
1225 HandleMark hm;
1226 ResourceMark rm;
1227 frame fr = thread->last_frame();
1228 assert(fr.is_interpreted_frame(), "");
1229 jint bci = fr.interpreter_frame_bci();
1230 methodHandle mh(thread, fr.interpreter_frame_method());
1231 Bytecode_invoke invoke(mh, bci);
1232 ArgumentSizeComputer asc(invoke.signature());
1233 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1234 Copy::conjoint_jbytes(src_address, dest_address,
1235 size_of_arguments * Interpreter::stackElementSize);
1236 IRT_END
1237 #endif
1238
1239 #if INCLUDE_JVMTI
1240 // This is a support of the JVMTI PopFrame interface.
1241 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1242 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1243 // The dmh argument is a reference to a DirectMethoHandle that has a member name field.
1244 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address dmh,
1245 Method* method, address bcp))
1246 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1247 if (code != Bytecodes::_invokestatic) {
1248 return;
1249 }
1250 ConstantPool* cpool = method->constants();
1251 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1252 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1253 Symbol* mname = cpool->name_ref_at(cp_index);
1254
1255 if (MethodHandles::has_member_arg(cname, mname)) {
1256 oop member_name = java_lang_invoke_DirectMethodHandle::member((oop)dmh);
1257 thread->set_vm_result(member_name);
1258 }
1259 IRT_END
1260 #endif // INCLUDE_JVMTI