1 /*
2 * Copyright 1999-2009 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 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_c1_Runtime1.cpp.incl"
27
28
29 // Implementation of StubAssembler
30
31 StubAssembler::StubAssembler(CodeBuffer* code, const char * name, int stub_id) : C1_MacroAssembler(code) {
32 _name = name;
33 _must_gc_arguments = false;
34 _frame_size = no_frame_size;
35 _num_rt_args = 0;
36 _stub_id = stub_id;
37 }
38
39
40 void StubAssembler::set_info(const char* name, bool must_gc_arguments) {
41 _name = name;
42 _must_gc_arguments = must_gc_arguments;
43 }
44
45
46 void StubAssembler::set_frame_size(int size) {
47 if (_frame_size == no_frame_size) {
48 _frame_size = size;
49 }
50 assert(_frame_size == size, "can't change the frame size");
51 }
52
53
54 void StubAssembler::set_num_rt_args(int args) {
55 if (_num_rt_args == 0) {
56 _num_rt_args = args;
57 }
58 assert(_num_rt_args == args, "can't change the number of args");
59 }
60
61 // Implementation of Runtime1
62
63 bool Runtime1::_is_initialized = false;
64 CodeBlob* Runtime1::_blobs[Runtime1::number_of_ids];
65 const char *Runtime1::_blob_names[] = {
66 RUNTIME1_STUBS(STUB_NAME, LAST_STUB_NAME)
67 };
68
69 #ifndef PRODUCT
70 // statistics
71 int Runtime1::_generic_arraycopy_cnt = 0;
72 int Runtime1::_primitive_arraycopy_cnt = 0;
73 int Runtime1::_oop_arraycopy_cnt = 0;
74 int Runtime1::_arraycopy_slowcase_cnt = 0;
75 int Runtime1::_new_type_array_slowcase_cnt = 0;
76 int Runtime1::_new_object_array_slowcase_cnt = 0;
77 int Runtime1::_new_instance_slowcase_cnt = 0;
78 int Runtime1::_new_multi_array_slowcase_cnt = 0;
79 int Runtime1::_monitorenter_slowcase_cnt = 0;
80 int Runtime1::_monitorexit_slowcase_cnt = 0;
81 int Runtime1::_patch_code_slowcase_cnt = 0;
82 int Runtime1::_throw_range_check_exception_count = 0;
83 int Runtime1::_throw_index_exception_count = 0;
84 int Runtime1::_throw_div0_exception_count = 0;
85 int Runtime1::_throw_null_pointer_exception_count = 0;
86 int Runtime1::_throw_class_cast_exception_count = 0;
87 int Runtime1::_throw_incompatible_class_change_error_count = 0;
88 int Runtime1::_throw_array_store_exception_count = 0;
89 int Runtime1::_throw_count = 0;
90 #endif
91
92 BufferBlob* Runtime1::_buffer_blob = NULL;
93
94 // Simple helper to see if the caller of a runtime stub which
95 // entered the VM has been deoptimized
96
97 static bool caller_is_deopted() {
98 JavaThread* thread = JavaThread::current();
99 RegisterMap reg_map(thread, false);
100 frame runtime_frame = thread->last_frame();
101 frame caller_frame = runtime_frame.sender(®_map);
102 assert(caller_frame.is_compiled_frame(), "must be compiled");
103 return caller_frame.is_deoptimized_frame();
104 }
105
106 // Stress deoptimization
107 static void deopt_caller() {
108 if ( !caller_is_deopted()) {
109 JavaThread* thread = JavaThread::current();
110 RegisterMap reg_map(thread, false);
111 frame runtime_frame = thread->last_frame();
112 frame caller_frame = runtime_frame.sender(®_map);
113 VM_DeoptimizeFrame deopt(thread, caller_frame.id());
114 VMThread::execute(&deopt);
115 assert(caller_is_deopted(), "Must be deoptimized");
116 }
117 }
118
119
120 BufferBlob* Runtime1::get_buffer_blob() {
121 // Allocate code buffer space only once
122 BufferBlob* blob = _buffer_blob;
123 if (blob == NULL) {
124 // setup CodeBuffer. Preallocate a BufferBlob of size
125 // NMethodSizeLimit plus some extra space for constants.
126 int code_buffer_size = desired_max_code_buffer_size() + desired_max_constant_size();
127 blob = BufferBlob::create("Compiler1 temporary CodeBuffer",
128 code_buffer_size);
129 guarantee(blob != NULL, "must create initial code buffer");
130 _buffer_blob = blob;
131 }
132 return _buffer_blob;
133 }
134
135 void Runtime1::setup_code_buffer(CodeBuffer* code, int call_stub_estimate) {
136 // Preinitialize the consts section to some large size:
137 int locs_buffer_size = 20 * (relocInfo::length_limit + sizeof(relocInfo));
138 char* locs_buffer = NEW_RESOURCE_ARRAY(char, locs_buffer_size);
139 code->insts()->initialize_shared_locs((relocInfo*)locs_buffer,
140 locs_buffer_size / sizeof(relocInfo));
141 code->initialize_consts_size(desired_max_constant_size());
142 // Call stubs + deopt/exception handler
143 code->initialize_stubs_size((call_stub_estimate * LIR_Assembler::call_stub_size) +
144 LIR_Assembler::exception_handler_size +
145 LIR_Assembler::deopt_handler_size);
146 }
147
148
149 void Runtime1::generate_blob_for(StubID id) {
150 assert(0 <= id && id < number_of_ids, "illegal stub id");
151 ResourceMark rm;
152 // create code buffer for code storage
153 CodeBuffer code(get_buffer_blob()->instructions_begin(),
154 get_buffer_blob()->instructions_size());
155
156 setup_code_buffer(&code, 0);
157
158 // create assembler for code generation
159 StubAssembler* sasm = new StubAssembler(&code, name_for(id), id);
160 // generate code for runtime stub
161 OopMapSet* oop_maps;
162 oop_maps = generate_code_for(id, sasm);
163 assert(oop_maps == NULL || sasm->frame_size() != no_frame_size,
164 "if stub has an oop map it must have a valid frame size");
165
166 #ifdef ASSERT
167 // Make sure that stubs that need oopmaps have them
168 switch (id) {
169 // These stubs don't need to have an oopmap
170 case dtrace_object_alloc_id:
171 case g1_pre_barrier_slow_id:
172 case g1_post_barrier_slow_id:
173 case slow_subtype_check_id:
174 case fpu2long_stub_id:
175 case unwind_exception_id:
176 #ifndef TIERED
177 case counter_overflow_id: // Not generated outside the tiered world
178 #endif
179 #ifdef SPARC
180 case handle_exception_nofpu_id: // Unused on sparc
181 #endif
182 break;
183
184 // All other stubs should have oopmaps
185 default:
186 assert(oop_maps != NULL, "must have an oopmap");
187 }
188 #endif
189
190 // align so printing shows nop's instead of random code at the end (SimpleStubs are aligned)
191 sasm->align(BytesPerWord);
192 // make sure all code is in code buffer
193 sasm->flush();
194 // create blob - distinguish a few special cases
195 CodeBlob* blob = RuntimeStub::new_runtime_stub(name_for(id),
196 &code,
197 CodeOffsets::frame_never_safe,
198 sasm->frame_size(),
199 oop_maps,
200 sasm->must_gc_arguments());
201 // install blob
202 assert(blob != NULL, "blob must exist");
203 _blobs[id] = blob;
204 }
205
206
207 void Runtime1::initialize() {
208 // Warning: If we have more than one compilation running in parallel, we
209 // need a lock here with the current setup (lazy initialization).
210 if (!is_initialized()) {
211 _is_initialized = true;
212
213 // platform-dependent initialization
214 initialize_pd();
215 // generate stubs
216 for (int id = 0; id < number_of_ids; id++) generate_blob_for((StubID)id);
217 // printing
218 #ifndef PRODUCT
219 if (PrintSimpleStubs) {
220 ResourceMark rm;
221 for (int id = 0; id < number_of_ids; id++) {
222 _blobs[id]->print();
223 if (_blobs[id]->oop_maps() != NULL) {
224 _blobs[id]->oop_maps()->print();
225 }
226 }
227 }
228 #endif
229 }
230 }
231
232
233 CodeBlob* Runtime1::blob_for(StubID id) {
234 assert(0 <= id && id < number_of_ids, "illegal stub id");
235 if (!is_initialized()) initialize();
236 return _blobs[id];
237 }
238
239
240 const char* Runtime1::name_for(StubID id) {
241 assert(0 <= id && id < number_of_ids, "illegal stub id");
242 return _blob_names[id];
243 }
244
245 const char* Runtime1::name_for_address(address entry) {
246 for (int id = 0; id < number_of_ids; id++) {
247 if (entry == entry_for((StubID)id)) return name_for((StubID)id);
248 }
249
250 #define FUNCTION_CASE(a, f) \
251 if ((intptr_t)a == CAST_FROM_FN_PTR(intptr_t, f)) return #f
252
253 FUNCTION_CASE(entry, os::javaTimeMillis);
254 FUNCTION_CASE(entry, os::javaTimeNanos);
255 FUNCTION_CASE(entry, SharedRuntime::OSR_migration_end);
256 FUNCTION_CASE(entry, SharedRuntime::d2f);
257 FUNCTION_CASE(entry, SharedRuntime::d2i);
258 FUNCTION_CASE(entry, SharedRuntime::d2l);
259 FUNCTION_CASE(entry, SharedRuntime::dcos);
260 FUNCTION_CASE(entry, SharedRuntime::dexp);
261 FUNCTION_CASE(entry, SharedRuntime::dlog);
262 FUNCTION_CASE(entry, SharedRuntime::dlog10);
263 FUNCTION_CASE(entry, SharedRuntime::dpow);
264 FUNCTION_CASE(entry, SharedRuntime::drem);
265 FUNCTION_CASE(entry, SharedRuntime::dsin);
266 FUNCTION_CASE(entry, SharedRuntime::dtan);
267 FUNCTION_CASE(entry, SharedRuntime::f2i);
268 FUNCTION_CASE(entry, SharedRuntime::f2l);
269 FUNCTION_CASE(entry, SharedRuntime::frem);
270 FUNCTION_CASE(entry, SharedRuntime::l2d);
271 FUNCTION_CASE(entry, SharedRuntime::l2f);
272 FUNCTION_CASE(entry, SharedRuntime::ldiv);
273 FUNCTION_CASE(entry, SharedRuntime::lmul);
274 FUNCTION_CASE(entry, SharedRuntime::lrem);
275 FUNCTION_CASE(entry, SharedRuntime::lrem);
276 FUNCTION_CASE(entry, SharedRuntime::dtrace_method_entry);
277 FUNCTION_CASE(entry, SharedRuntime::dtrace_method_exit);
278 FUNCTION_CASE(entry, trace_block_entry);
279
280 #undef FUNCTION_CASE
281
282 return "<unknown function>";
283 }
284
285
286 JRT_ENTRY(void, Runtime1::new_instance(JavaThread* thread, klassOopDesc* klass))
287 NOT_PRODUCT(_new_instance_slowcase_cnt++;)
288
289 assert(oop(klass)->is_klass(), "not a class");
290 instanceKlassHandle h(thread, klass);
291 h->check_valid_for_instantiation(true, CHECK);
292 // make sure klass is initialized
293 h->initialize(CHECK);
294 // allocate instance and return via TLS
295 oop obj = h->allocate_instance(CHECK);
296 thread->set_vm_result(obj);
297 JRT_END
298
299
300 JRT_ENTRY(void, Runtime1::new_type_array(JavaThread* thread, klassOopDesc* klass, jint length))
301 NOT_PRODUCT(_new_type_array_slowcase_cnt++;)
302 // Note: no handle for klass needed since they are not used
303 // anymore after new_typeArray() and no GC can happen before.
304 // (This may have to change if this code changes!)
305 assert(oop(klass)->is_klass(), "not a class");
306 BasicType elt_type = typeArrayKlass::cast(klass)->element_type();
307 oop obj = oopFactory::new_typeArray(elt_type, length, CHECK);
308 thread->set_vm_result(obj);
309 // This is pretty rare but this runtime patch is stressful to deoptimization
310 // if we deoptimize here so force a deopt to stress the path.
311 if (DeoptimizeALot) {
312 deopt_caller();
313 }
314
315 JRT_END
316
317
318 JRT_ENTRY(void, Runtime1::new_object_array(JavaThread* thread, klassOopDesc* array_klass, jint length))
319 NOT_PRODUCT(_new_object_array_slowcase_cnt++;)
320
321 // Note: no handle for klass needed since they are not used
322 // anymore after new_objArray() and no GC can happen before.
323 // (This may have to change if this code changes!)
324 assert(oop(array_klass)->is_klass(), "not a class");
325 klassOop elem_klass = objArrayKlass::cast(array_klass)->element_klass();
326 objArrayOop obj = oopFactory::new_objArray(elem_klass, length, CHECK);
327 thread->set_vm_result(obj);
328 // This is pretty rare but this runtime patch is stressful to deoptimization
329 // if we deoptimize here so force a deopt to stress the path.
330 if (DeoptimizeALot) {
331 deopt_caller();
332 }
333 JRT_END
334
335
336 JRT_ENTRY(void, Runtime1::new_multi_array(JavaThread* thread, klassOopDesc* klass, int rank, jint* dims))
337 NOT_PRODUCT(_new_multi_array_slowcase_cnt++;)
338
339 assert(oop(klass)->is_klass(), "not a class");
340 assert(rank >= 1, "rank must be nonzero");
341 oop obj = arrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
342 thread->set_vm_result(obj);
343 JRT_END
344
345
346 JRT_ENTRY(void, Runtime1::unimplemented_entry(JavaThread* thread, StubID id))
347 tty->print_cr("Runtime1::entry_for(%d) returned unimplemented entry point", id);
348 JRT_END
349
350
351 JRT_ENTRY(void, Runtime1::throw_array_store_exception(JavaThread* thread))
352 THROW(vmSymbolHandles::java_lang_ArrayStoreException());
353 JRT_END
354
355
356 JRT_ENTRY(void, Runtime1::post_jvmti_exception_throw(JavaThread* thread))
357 if (JvmtiExport::can_post_exceptions()) {
358 vframeStream vfst(thread, true);
359 address bcp = vfst.method()->bcp_from(vfst.bci());
360 JvmtiExport::post_exception_throw(thread, vfst.method(), bcp, thread->exception_oop());
361 }
362 JRT_END
363
364 #ifdef TIERED
365 JRT_ENTRY(void, Runtime1::counter_overflow(JavaThread* thread, int bci))
366 RegisterMap map(thread, false);
367 frame fr = thread->last_frame().sender(&map);
368 nmethod* nm = (nmethod*) fr.cb();
369 assert(nm!= NULL && nm->is_nmethod(), "what?");
370 methodHandle method(thread, nm->method());
371 if (bci == 0) {
372 // invocation counter overflow
373 if (!Tier1CountOnly) {
374 CompilationPolicy::policy()->method_invocation_event(method, CHECK);
375 } else {
376 method()->invocation_counter()->reset();
377 }
378 } else {
379 if (!Tier1CountOnly) {
380 // Twe have a bci but not the destination bci and besides a backedge
381 // event is more for OSR which we don't want here.
382 CompilationPolicy::policy()->method_invocation_event(method, CHECK);
383 } else {
384 method()->backedge_counter()->reset();
385 }
386 }
387 JRT_END
388 #endif // TIERED
389
390 extern void vm_exit(int code);
391
392 // Enter this method from compiled code handler below. This is where we transition
393 // to VM mode. This is done as a helper routine so that the method called directly
394 // from compiled code does not have to transition to VM. This allows the entry
395 // method to see if the nmethod that we have just looked up a handler for has
396 // been deoptimized while we were in the vm. This simplifies the assembly code
397 // cpu directories.
398 //
399 // We are entering here from exception stub (via the entry method below)
400 // If there is a compiled exception handler in this method, we will continue there;
401 // otherwise we will unwind the stack and continue at the caller of top frame method
402 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
403 // control the area where we can allow a safepoint. After we exit the safepoint area we can
404 // check to see if the handler we are going to return is now in a nmethod that has
405 // been deoptimized. If that is the case we return the deopt blob
406 // unpack_with_exception entry instead. This makes life for the exception blob easier
407 // because making that same check and diverting is painful from assembly language.
408 //
409
410
411 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm))
412
413 Handle exception(thread, ex);
414 nm = CodeCache::find_nmethod(pc);
415 assert(nm != NULL, "this is not an nmethod");
416 // Adjust the pc as needed/
417 if (nm->is_deopt_pc(pc)) {
418 RegisterMap map(thread, false);
419 frame exception_frame = thread->last_frame().sender(&map);
420 // if the frame isn't deopted then pc must not correspond to the caller of last_frame
421 assert(exception_frame.is_deoptimized_frame(), "must be deopted");
422 pc = exception_frame.pc();
423 }
424 #ifdef ASSERT
425 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
426 assert(exception->is_oop(), "just checking");
427 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
428 if (!(exception->is_a(SystemDictionary::throwable_klass()))) {
429 if (ExitVMOnVerifyError) vm_exit(-1);
430 ShouldNotReachHere();
431 }
432 #endif
433
434 // Check the stack guard pages and reenable them if necessary and there is
435 // enough space on the stack to do so. Use fast exceptions only if the guard
436 // pages are enabled.
437 bool guard_pages_enabled = thread->stack_yellow_zone_enabled();
438 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
439
440 if (JvmtiExport::can_post_exceptions()) {
441 // To ensure correct notification of exception catches and throws
442 // we have to deoptimize here. If we attempted to notify the
443 // catches and throws during this exception lookup it's possible
444 // we could deoptimize on the way out of the VM and end back in
445 // the interpreter at the throw site. This would result in double
446 // notifications since the interpreter would also notify about
447 // these same catches and throws as it unwound the frame.
448
449 RegisterMap reg_map(thread);
450 frame stub_frame = thread->last_frame();
451 frame caller_frame = stub_frame.sender(®_map);
452
453 // We don't really want to deoptimize the nmethod itself since we
454 // can actually continue in the exception handler ourselves but I
455 // don't see an easy way to have the desired effect.
456 VM_DeoptimizeFrame deopt(thread, caller_frame.id());
457 VMThread::execute(&deopt);
458
459 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
460 }
461
462 // ExceptionCache is used only for exceptions at call and not for implicit exceptions
463 if (guard_pages_enabled) {
464 address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);
465 if (fast_continuation != NULL) {
466 if (fast_continuation == ExceptionCache::unwind_handler()) fast_continuation = NULL;
467 return fast_continuation;
468 }
469 }
470
471 // If the stack guard pages are enabled, check whether there is a handler in
472 // the current method. Otherwise (guard pages disabled), force an unwind and
473 // skip the exception cache update (i.e., just leave continuation==NULL).
474 address continuation = NULL;
475 if (guard_pages_enabled) {
476
477 // New exception handling mechanism can support inlined methods
478 // with exception handlers since the mappings are from PC to PC
479
480 // debugging support
481 // tracing
482 if (TraceExceptions) {
483 ttyLocker ttyl;
484 ResourceMark rm;
485 tty->print_cr("Exception <%s> (0x%x) thrown in compiled method <%s> at PC " PTR_FORMAT " for thread 0x%x",
486 exception->print_value_string(), (address)exception(), nm->method()->print_value_string(), pc, thread);
487 }
488 // for AbortVMOnException flag
489 NOT_PRODUCT(Exceptions::debug_check_abort(exception));
490
491 // Clear out the exception oop and pc since looking up an
492 // exception handler can cause class loading, which might throw an
493 // exception and those fields are expected to be clear during
494 // normal bytecode execution.
495 thread->set_exception_oop(NULL);
496 thread->set_exception_pc(NULL);
497
498 continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false);
499 // If an exception was thrown during exception dispatch, the exception oop may have changed
500 thread->set_exception_oop(exception());
501 thread->set_exception_pc(pc);
502
503 // the exception cache is used only by non-implicit exceptions
504 if (continuation == NULL) {
505 nm->add_handler_for_exception_and_pc(exception, pc, ExceptionCache::unwind_handler());
506 } else {
507 nm->add_handler_for_exception_and_pc(exception, pc, continuation);
508 }
509 }
510
511 thread->set_vm_result(exception());
512
513 if (TraceExceptions) {
514 ttyLocker ttyl;
515 ResourceMark rm;
516 tty->print_cr("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT " for exception thrown at PC " PTR_FORMAT,
517 thread, continuation, pc);
518 }
519
520 return continuation;
521 JRT_END
522
523 // Enter this method from compiled code only if there is a Java exception handler
524 // in the method handling the exception
525 // We are entering here from exception stub. We don't do a normal VM transition here.
526 // We do it in a helper. This is so we can check to see if the nmethod we have just
527 // searched for an exception handler has been deoptimized in the meantime.
528 address Runtime1::exception_handler_for_pc(JavaThread* thread) {
529 oop exception = thread->exception_oop();
530 address pc = thread->exception_pc();
531 // Still in Java mode
532 debug_only(ResetNoHandleMark rnhm);
533 nmethod* nm = NULL;
534 address continuation = NULL;
535 {
536 // Enter VM mode by calling the helper
537
538 ResetNoHandleMark rnhm;
539 continuation = exception_handler_for_pc_helper(thread, exception, pc, nm);
540 }
541 // Back in JAVA, use no oops DON'T safepoint
542
543 // Now check to see if the nmethod we were called from is now deoptimized.
544 // If so we must return to the deopt blob and deoptimize the nmethod
545
546 if (nm != NULL && caller_is_deopted()) {
547 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
548 }
549
550 return continuation;
551 }
552
553
554 JRT_ENTRY(void, Runtime1::throw_range_check_exception(JavaThread* thread, int index))
555 NOT_PRODUCT(_throw_range_check_exception_count++;)
556 Events::log("throw_range_check");
557 char message[jintAsStringSize];
558 sprintf(message, "%d", index);
559 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message);
560 JRT_END
561
562
563 JRT_ENTRY(void, Runtime1::throw_index_exception(JavaThread* thread, int index))
564 NOT_PRODUCT(_throw_index_exception_count++;)
565 Events::log("throw_index");
566 char message[16];
567 sprintf(message, "%d", index);
568 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IndexOutOfBoundsException(), message);
569 JRT_END
570
571
572 JRT_ENTRY(void, Runtime1::throw_div0_exception(JavaThread* thread))
573 NOT_PRODUCT(_throw_div0_exception_count++;)
574 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero");
575 JRT_END
576
577
578 JRT_ENTRY(void, Runtime1::throw_null_pointer_exception(JavaThread* thread))
579 NOT_PRODUCT(_throw_null_pointer_exception_count++;)
580 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException());
581 JRT_END
582
583
584 JRT_ENTRY(void, Runtime1::throw_class_cast_exception(JavaThread* thread, oopDesc* object))
585 NOT_PRODUCT(_throw_class_cast_exception_count++;)
586 ResourceMark rm(thread);
587 char* message = SharedRuntime::generate_class_cast_message(
588 thread, Klass::cast(object->klass())->external_name());
589 SharedRuntime::throw_and_post_jvmti_exception(
590 thread, vmSymbols::java_lang_ClassCastException(), message);
591 JRT_END
592
593
594 JRT_ENTRY(void, Runtime1::throw_incompatible_class_change_error(JavaThread* thread))
595 NOT_PRODUCT(_throw_incompatible_class_change_error_count++;)
596 ResourceMark rm(thread);
597 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError());
598 JRT_END
599
600
601 JRT_ENTRY_NO_ASYNC(void, Runtime1::monitorenter(JavaThread* thread, oopDesc* obj, BasicObjectLock* lock))
602 NOT_PRODUCT(_monitorenter_slowcase_cnt++;)
603 if (PrintBiasedLockingStatistics) {
604 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
605 }
606 Handle h_obj(thread, obj);
607 assert(h_obj()->is_oop(), "must be NULL or an object");
608 if (UseBiasedLocking) {
609 // Retry fast entry if bias is revoked to avoid unnecessary inflation
610 ObjectSynchronizer::fast_enter(h_obj, lock->lock(), true, CHECK);
611 } else {
612 if (UseFastLocking) {
613 // When using fast locking, the compiled code has already tried the fast case
614 assert(obj == lock->obj(), "must match");
615 ObjectSynchronizer::slow_enter(h_obj, lock->lock(), THREAD);
616 } else {
617 lock->set_obj(obj);
618 ObjectSynchronizer::fast_enter(h_obj, lock->lock(), false, THREAD);
619 }
620 }
621 JRT_END
622
623
624 JRT_LEAF(void, Runtime1::monitorexit(JavaThread* thread, BasicObjectLock* lock))
625 NOT_PRODUCT(_monitorexit_slowcase_cnt++;)
626 assert(thread == JavaThread::current(), "threads must correspond");
627 assert(thread->last_Java_sp(), "last_Java_sp must be set");
628 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
629 EXCEPTION_MARK;
630
631 oop obj = lock->obj();
632 assert(obj->is_oop(), "must be NULL or an object");
633 if (UseFastLocking) {
634 // When using fast locking, the compiled code has already tried the fast case
635 ObjectSynchronizer::slow_exit(obj, lock->lock(), THREAD);
636 } else {
637 ObjectSynchronizer::fast_exit(obj, lock->lock(), THREAD);
638 }
639 JRT_END
640
641
642 static klassOop resolve_field_return_klass(methodHandle caller, int bci, TRAPS) {
643 Bytecode_field* field_access = Bytecode_field_at(caller(), caller->bcp_from(bci));
644 // This can be static or non-static field access
645 Bytecodes::Code code = field_access->code();
646
647 // We must load class, initialize class and resolvethe field
648 FieldAccessInfo result; // initialize class if needed
649 constantPoolHandle constants(THREAD, caller->constants());
650 LinkResolver::resolve_field(result, constants, field_access->index(), Bytecodes::java_code(code), false, CHECK_NULL);
651 return result.klass()();
652 }
653
654
655 //
656 // This routine patches sites where a class wasn't loaded or
657 // initialized at the time the code was generated. It handles
658 // references to classes, fields and forcing of initialization. Most
659 // of the cases are straightforward and involving simply forcing
660 // resolution of a class, rewriting the instruction stream with the
661 // needed constant and replacing the call in this function with the
662 // patched code. The case for static field is more complicated since
663 // the thread which is in the process of initializing a class can
664 // access it's static fields but other threads can't so the code
665 // either has to deoptimize when this case is detected or execute a
666 // check that the current thread is the initializing thread. The
667 // current
668 //
669 // Patches basically look like this:
670 //
671 //
672 // patch_site: jmp patch stub ;; will be patched
673 // continue: ...
674 // ...
675 // ...
676 // ...
677 //
678 // They have a stub which looks like this:
679 //
680 // ;; patch body
681 // movl <const>, reg (for class constants)
682 // <or> movl [reg1 + <const>], reg (for field offsets)
683 // <or> movl reg, [reg1 + <const>] (for field offsets)
684 // <being_init offset> <bytes to copy> <bytes to skip>
685 // patch_stub: call Runtime1::patch_code (through a runtime stub)
686 // jmp patch_site
687 //
688 //
689 // A normal patch is done by rewriting the patch body, usually a move,
690 // and then copying it into place over top of the jmp instruction
691 // being careful to flush caches and doing it in an MP-safe way. The
692 // constants following the patch body are used to find various pieces
693 // of the patch relative to the call site for Runtime1::patch_code.
694 // The case for getstatic and putstatic is more complicated because
695 // getstatic and putstatic have special semantics when executing while
696 // the class is being initialized. getstatic/putstatic on a class
697 // which is being_initialized may be executed by the initializing
698 // thread but other threads have to block when they execute it. This
699 // is accomplished in compiled code by executing a test of the current
700 // thread against the initializing thread of the class. It's emitted
701 // as boilerplate in their stub which allows the patched code to be
702 // executed before it's copied back into the main body of the nmethod.
703 //
704 // being_init: get_thread(<tmp reg>
705 // cmpl [reg1 + <init_thread_offset>], <tmp reg>
706 // jne patch_stub
707 // movl [reg1 + <const>], reg (for field offsets) <or>
708 // movl reg, [reg1 + <const>] (for field offsets)
709 // jmp continue
710 // <being_init offset> <bytes to copy> <bytes to skip>
711 // patch_stub: jmp Runtim1::patch_code (through a runtime stub)
712 // jmp patch_site
713 //
714 // If the class is being initialized the patch body is rewritten and
715 // the patch site is rewritten to jump to being_init, instead of
716 // patch_stub. Whenever this code is executed it checks the current
717 // thread against the intializing thread so other threads will enter
718 // the runtime and end up blocked waiting the class to finish
719 // initializing inside the calls to resolve_field below. The
720 // initializing class will continue on it's way. Once the class is
721 // fully_initialized, the intializing_thread of the class becomes
722 // NULL, so the next thread to execute this code will fail the test,
723 // call into patch_code and complete the patching process by copying
724 // the patch body back into the main part of the nmethod and resume
725 // executing.
726 //
727 //
728
729 JRT_ENTRY(void, Runtime1::patch_code(JavaThread* thread, Runtime1::StubID stub_id ))
730 NOT_PRODUCT(_patch_code_slowcase_cnt++;)
731
732 ResourceMark rm(thread);
733 RegisterMap reg_map(thread, false);
734 frame runtime_frame = thread->last_frame();
735 frame caller_frame = runtime_frame.sender(®_map);
736
737 // last java frame on stack
738 vframeStream vfst(thread, true);
739 assert(!vfst.at_end(), "Java frame must exist");
740
741 methodHandle caller_method(THREAD, vfst.method());
742 // Note that caller_method->code() may not be same as caller_code because of OSR's
743 // Note also that in the presence of inlining it is not guaranteed
744 // that caller_method() == caller_code->method()
745
746
747 int bci = vfst.bci();
748
749 Events::log("patch_code @ " INTPTR_FORMAT , caller_frame.pc());
750
751 Bytecodes::Code code = Bytecode_at(caller_method->bcp_from(bci))->java_code();
752
753 #ifndef PRODUCT
754 // this is used by assertions in the access_field_patching_id
755 BasicType patch_field_type = T_ILLEGAL;
756 #endif // PRODUCT
757 bool deoptimize_for_volatile = false;
758 int patch_field_offset = -1;
759 KlassHandle init_klass(THREAD, klassOop(NULL)); // klass needed by access_field_patching code
760 Handle load_klass(THREAD, NULL); // oop needed by load_klass_patching code
761 if (stub_id == Runtime1::access_field_patching_id) {
762
763 Bytecode_field* field_access = Bytecode_field_at(caller_method(), caller_method->bcp_from(bci));
764 FieldAccessInfo result; // initialize class if needed
765 Bytecodes::Code code = field_access->code();
766 constantPoolHandle constants(THREAD, caller_method->constants());
767 LinkResolver::resolve_field(result, constants, field_access->index(), Bytecodes::java_code(code), false, CHECK);
768 patch_field_offset = result.field_offset();
769
770 // If we're patching a field which is volatile then at compile it
771 // must not have been know to be volatile, so the generated code
772 // isn't correct for a volatile reference. The nmethod has to be
773 // deoptimized so that the code can be regenerated correctly.
774 // This check is only needed for access_field_patching since this
775 // is the path for patching field offsets. load_klass is only
776 // used for patching references to oops which don't need special
777 // handling in the volatile case.
778 deoptimize_for_volatile = result.access_flags().is_volatile();
779
780 #ifndef PRODUCT
781 patch_field_type = result.field_type();
782 #endif
783 } else if (stub_id == Runtime1::load_klass_patching_id) {
784 oop k;
785 switch (code) {
786 case Bytecodes::_putstatic:
787 case Bytecodes::_getstatic:
788 { klassOop klass = resolve_field_return_klass(caller_method, bci, CHECK);
789 // Save a reference to the class that has to be checked for initialization
790 init_klass = KlassHandle(THREAD, klass);
791 k = klass;
792 }
793 break;
794 case Bytecodes::_new:
795 { Bytecode_new* bnew = Bytecode_new_at(caller_method->bcp_from(bci));
796 k = caller_method->constants()->klass_at(bnew->index(), CHECK);
797 }
798 break;
799 case Bytecodes::_multianewarray:
800 { Bytecode_multianewarray* mna = Bytecode_multianewarray_at(caller_method->bcp_from(bci));
801 k = caller_method->constants()->klass_at(mna->index(), CHECK);
802 }
803 break;
804 case Bytecodes::_instanceof:
805 { Bytecode_instanceof* io = Bytecode_instanceof_at(caller_method->bcp_from(bci));
806 k = caller_method->constants()->klass_at(io->index(), CHECK);
807 }
808 break;
809 case Bytecodes::_checkcast:
810 { Bytecode_checkcast* cc = Bytecode_checkcast_at(caller_method->bcp_from(bci));
811 k = caller_method->constants()->klass_at(cc->index(), CHECK);
812 }
813 break;
814 case Bytecodes::_anewarray:
815 { Bytecode_anewarray* anew = Bytecode_anewarray_at(caller_method->bcp_from(bci));
816 klassOop ek = caller_method->constants()->klass_at(anew->index(), CHECK);
817 k = Klass::cast(ek)->array_klass(CHECK);
818 }
819 break;
820 case Bytecodes::_ldc:
821 case Bytecodes::_ldc_w:
822 {
823 Bytecode_loadconstant* cc = Bytecode_loadconstant_at(caller_method(),
824 caller_method->bcp_from(bci));
825 klassOop resolved = caller_method->constants()->klass_at(cc->index(), CHECK);
826 // ldc wants the java mirror.
827 k = resolved->klass_part()->java_mirror();
828 }
829 break;
830 default: Unimplemented();
831 }
832 // convert to handle
833 load_klass = Handle(THREAD, k);
834 } else {
835 ShouldNotReachHere();
836 }
837
838 if (deoptimize_for_volatile) {
839 // At compile time we assumed the field wasn't volatile but after
840 // loading it turns out it was volatile so we have to throw the
841 // compiled code out and let it be regenerated.
842 if (TracePatching) {
843 tty->print_cr("Deoptimizing for patching volatile field reference");
844 }
845 // It's possible the nmethod was invalidated in the last
846 // safepoint, but if it's still alive then make it not_entrant.
847 nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
848 if (nm != NULL) {
849 nm->make_not_entrant();
850 }
851
852 VM_DeoptimizeFrame deopt(thread, caller_frame.id());
853 VMThread::execute(&deopt);
854
855 // Return to the now deoptimized frame.
856 }
857
858
859 // Now copy code back
860
861 {
862 MutexLockerEx ml_patch (Patching_lock, Mutex::_no_safepoint_check_flag);
863 //
864 // Deoptimization may have happened while we waited for the lock.
865 // In that case we don't bother to do any patching we just return
866 // and let the deopt happen
867 if (!caller_is_deopted()) {
868 NativeGeneralJump* jump = nativeGeneralJump_at(caller_frame.pc());
869 address instr_pc = jump->jump_destination();
870 NativeInstruction* ni = nativeInstruction_at(instr_pc);
871 if (ni->is_jump() ) {
872 // the jump has not been patched yet
873 // The jump destination is slow case and therefore not part of the stubs
874 // (stubs are only for StaticCalls)
875
876 // format of buffer
877 // ....
878 // instr byte 0 <-- copy_buff
879 // instr byte 1
880 // ..
881 // instr byte n-1
882 // n
883 // .... <-- call destination
884
885 address stub_location = caller_frame.pc() + PatchingStub::patch_info_offset();
886 unsigned char* byte_count = (unsigned char*) (stub_location - 1);
887 unsigned char* byte_skip = (unsigned char*) (stub_location - 2);
888 unsigned char* being_initialized_entry_offset = (unsigned char*) (stub_location - 3);
889 address copy_buff = stub_location - *byte_skip - *byte_count;
890 address being_initialized_entry = stub_location - *being_initialized_entry_offset;
891 if (TracePatching) {
892 tty->print_cr(" Patching %s at bci %d at address 0x%x (%s)", Bytecodes::name(code), bci,
893 instr_pc, (stub_id == Runtime1::access_field_patching_id) ? "field" : "klass");
894 nmethod* caller_code = CodeCache::find_nmethod(caller_frame.pc());
895 assert(caller_code != NULL, "nmethod not found");
896
897 // NOTE we use pc() not original_pc() because we already know they are
898 // identical otherwise we'd have never entered this block of code
899
900 OopMap* map = caller_code->oop_map_for_return_address(caller_frame.pc());
901 assert(map != NULL, "null check");
902 map->print();
903 tty->cr();
904
905 Disassembler::decode(copy_buff, copy_buff + *byte_count, tty);
906 }
907 // depending on the code below, do_patch says whether to copy the patch body back into the nmethod
908 bool do_patch = true;
909 if (stub_id == Runtime1::access_field_patching_id) {
910 // The offset may not be correct if the class was not loaded at code generation time.
911 // Set it now.
912 NativeMovRegMem* n_move = nativeMovRegMem_at(copy_buff);
913 assert(n_move->offset() == 0 || (n_move->offset() == 4 && (patch_field_type == T_DOUBLE || patch_field_type == T_LONG)), "illegal offset for type");
914 assert(patch_field_offset >= 0, "illegal offset");
915 n_move->add_offset_in_bytes(patch_field_offset);
916 } else if (stub_id == Runtime1::load_klass_patching_id) {
917 // If a getstatic or putstatic is referencing a klass which
918 // isn't fully initialized, the patch body isn't copied into
919 // place until initialization is complete. In this case the
920 // patch site is setup so that any threads besides the
921 // initializing thread are forced to come into the VM and
922 // block.
923 do_patch = (code != Bytecodes::_getstatic && code != Bytecodes::_putstatic) ||
924 instanceKlass::cast(init_klass())->is_initialized();
925 NativeGeneralJump* jump = nativeGeneralJump_at(instr_pc);
926 if (jump->jump_destination() == being_initialized_entry) {
927 assert(do_patch == true, "initialization must be complete at this point");
928 } else {
929 // patch the instruction <move reg, klass>
930 NativeMovConstReg* n_copy = nativeMovConstReg_at(copy_buff);
931 assert(n_copy->data() == 0, "illegal init value");
932 assert(load_klass() != NULL, "klass not set");
933 n_copy->set_data((intx) (load_klass()));
934
935 if (TracePatching) {
936 Disassembler::decode(copy_buff, copy_buff + *byte_count, tty);
937 }
938
939 #ifdef SPARC
940 // Update the oop location in the nmethod with the proper
941 // oop. When the code was generated, a NULL was stuffed
942 // in the oop table and that table needs to be update to
943 // have the right value. On intel the value is kept
944 // directly in the instruction instead of in the oop
945 // table, so set_data above effectively updated the value.
946 nmethod* nm = CodeCache::find_nmethod(instr_pc);
947 assert(nm != NULL, "invalid nmethod_pc");
948 RelocIterator oops(nm, copy_buff, copy_buff + 1);
949 bool found = false;
950 while (oops.next() && !found) {
951 if (oops.type() == relocInfo::oop_type) {
952 oop_Relocation* r = oops.oop_reloc();
953 oop* oop_adr = r->oop_addr();
954 *oop_adr = load_klass();
955 r->fix_oop_relocation();
956 found = true;
957 }
958 }
959 assert(found, "the oop must exist!");
960 #endif
961
962 }
963 } else {
964 ShouldNotReachHere();
965 }
966 if (do_patch) {
967 // replace instructions
968 // first replace the tail, then the call
969 for (int i = NativeCall::instruction_size; i < *byte_count; i++) {
970 address ptr = copy_buff + i;
971 int a_byte = (*ptr) & 0xFF;
972 address dst = instr_pc + i;
973 *(unsigned char*)dst = (unsigned char) a_byte;
974 }
975 ICache::invalidate_range(instr_pc, *byte_count);
976 NativeGeneralJump::replace_mt_safe(instr_pc, copy_buff);
977
978 if (stub_id == Runtime1::load_klass_patching_id) {
979 // update relocInfo to oop
980 nmethod* nm = CodeCache::find_nmethod(instr_pc);
981 assert(nm != NULL, "invalid nmethod_pc");
982
983 // The old patch site is now a move instruction so update
984 // the reloc info so that it will get updated during
985 // future GCs.
986 RelocIterator iter(nm, (address)instr_pc, (address)(instr_pc + 1));
987 relocInfo::change_reloc_info_for_address(&iter, (address) instr_pc,
988 relocInfo::none, relocInfo::oop_type);
989 #ifdef SPARC
990 // Sparc takes two relocations for an oop so update the second one.
991 address instr_pc2 = instr_pc + NativeMovConstReg::add_offset;
992 RelocIterator iter2(nm, instr_pc2, instr_pc2 + 1);
993 relocInfo::change_reloc_info_for_address(&iter2, (address) instr_pc2,
994 relocInfo::none, relocInfo::oop_type);
995 #endif
996 }
997
998 } else {
999 ICache::invalidate_range(copy_buff, *byte_count);
1000 NativeGeneralJump::insert_unconditional(instr_pc, being_initialized_entry);
1001 }
1002 }
1003 }
1004 }
1005 JRT_END
1006
1007 //
1008 // Entry point for compiled code. We want to patch a nmethod.
1009 // We don't do a normal VM transition here because we want to
1010 // know after the patching is complete and any safepoint(s) are taken
1011 // if the calling nmethod was deoptimized. We do this by calling a
1012 // helper method which does the normal VM transition and when it
1013 // completes we can check for deoptimization. This simplifies the
1014 // assembly code in the cpu directories.
1015 //
1016 int Runtime1::move_klass_patching(JavaThread* thread) {
1017 //
1018 // NOTE: we are still in Java
1019 //
1020 Thread* THREAD = thread;
1021 debug_only(NoHandleMark nhm;)
1022 {
1023 // Enter VM mode
1024
1025 ResetNoHandleMark rnhm;
1026 patch_code(thread, load_klass_patching_id);
1027 }
1028 // Back in JAVA, use no oops DON'T safepoint
1029
1030 // Return true if calling code is deoptimized
1031
1032 return caller_is_deopted();
1033 }
1034
1035 //
1036 // Entry point for compiled code. We want to patch a nmethod.
1037 // We don't do a normal VM transition here because we want to
1038 // know after the patching is complete and any safepoint(s) are taken
1039 // if the calling nmethod was deoptimized. We do this by calling a
1040 // helper method which does the normal VM transition and when it
1041 // completes we can check for deoptimization. This simplifies the
1042 // assembly code in the cpu directories.
1043 //
1044
1045 int Runtime1::access_field_patching(JavaThread* thread) {
1046 //
1047 // NOTE: we are still in Java
1048 //
1049 Thread* THREAD = thread;
1050 debug_only(NoHandleMark nhm;)
1051 {
1052 // Enter VM mode
1053
1054 ResetNoHandleMark rnhm;
1055 patch_code(thread, access_field_patching_id);
1056 }
1057 // Back in JAVA, use no oops DON'T safepoint
1058
1059 // Return true if calling code is deoptimized
1060
1061 return caller_is_deopted();
1062 JRT_END
1063
1064
1065 JRT_LEAF(void, Runtime1::trace_block_entry(jint block_id))
1066 // for now we just print out the block id
1067 tty->print("%d ", block_id);
1068 JRT_END
1069
1070
1071 // Array copy return codes.
1072 enum {
1073 ac_failed = -1, // arraycopy failed
1074 ac_ok = 0 // arraycopy succeeded
1075 };
1076
1077
1078 template <class T> int obj_arraycopy_work(oopDesc* src, T* src_addr,
1079 oopDesc* dst, T* dst_addr,
1080 int length) {
1081
1082 // For performance reasons, we assume we are using a card marking write
1083 // barrier. The assert will fail if this is not the case.
1084 // Note that we use the non-virtual inlineable variant of write_ref_array.
1085 BarrierSet* bs = Universe::heap()->barrier_set();
1086 assert(bs->has_write_ref_array_opt(),
1087 "Barrier set must have ref array opt");
1088 if (src == dst) {
1089 // same object, no check
1090 Copy::conjoint_oops_atomic(src_addr, dst_addr, length);
1091 bs->write_ref_array(MemRegion((HeapWord*)dst_addr,
1092 (HeapWord*)(dst_addr + length)));
1093 return ac_ok;
1094 } else {
1095 klassOop bound = objArrayKlass::cast(dst->klass())->element_klass();
1096 klassOop stype = objArrayKlass::cast(src->klass())->element_klass();
1097 if (stype == bound || Klass::cast(stype)->is_subtype_of(bound)) {
1098 // Elements are guaranteed to be subtypes, so no check necessary
1099 Copy::conjoint_oops_atomic(src_addr, dst_addr, length);
1100 bs->write_ref_array(MemRegion((HeapWord*)dst_addr,
1101 (HeapWord*)(dst_addr + length)));
1102 return ac_ok;
1103 }
1104 }
1105 return ac_failed;
1106 }
1107
1108 // fast and direct copy of arrays; returning -1, means that an exception may be thrown
1109 // and we did not copy anything
1110 JRT_LEAF(int, Runtime1::arraycopy(oopDesc* src, int src_pos, oopDesc* dst, int dst_pos, int length))
1111 #ifndef PRODUCT
1112 _generic_arraycopy_cnt++; // Slow-path oop array copy
1113 #endif
1114
1115 if (src == NULL || dst == NULL || src_pos < 0 || dst_pos < 0 || length < 0) return ac_failed;
1116 if (!dst->is_array() || !src->is_array()) return ac_failed;
1117 if ((unsigned int) arrayOop(src)->length() < (unsigned int)src_pos + (unsigned int)length) return ac_failed;
1118 if ((unsigned int) arrayOop(dst)->length() < (unsigned int)dst_pos + (unsigned int)length) return ac_failed;
1119
1120 if (length == 0) return ac_ok;
1121 if (src->is_typeArray()) {
1122 const klassOop klass_oop = src->klass();
1123 if (klass_oop != dst->klass()) return ac_failed;
1124 typeArrayKlass* klass = typeArrayKlass::cast(klass_oop);
1125 const int l2es = klass->log2_element_size();
1126 const int ihs = klass->array_header_in_bytes() / wordSize;
1127 char* src_addr = (char*) ((oopDesc**)src + ihs) + (src_pos << l2es);
1128 char* dst_addr = (char*) ((oopDesc**)dst + ihs) + (dst_pos << l2es);
1129 // Potential problem: memmove is not guaranteed to be word atomic
1130 // Revisit in Merlin
1131 memmove(dst_addr, src_addr, length << l2es);
1132 return ac_ok;
1133 } else if (src->is_objArray() && dst->is_objArray()) {
1134 if (UseCompressedOops) { // will need for tiered
1135 narrowOop *src_addr = objArrayOop(src)->obj_at_addr<narrowOop>(src_pos);
1136 narrowOop *dst_addr = objArrayOop(dst)->obj_at_addr<narrowOop>(dst_pos);
1137 return obj_arraycopy_work(src, src_addr, dst, dst_addr, length);
1138 } else {
1139 oop *src_addr = objArrayOop(src)->obj_at_addr<oop>(src_pos);
1140 oop *dst_addr = objArrayOop(dst)->obj_at_addr<oop>(dst_pos);
1141 return obj_arraycopy_work(src, src_addr, dst, dst_addr, length);
1142 }
1143 }
1144 return ac_failed;
1145 JRT_END
1146
1147
1148 JRT_LEAF(void, Runtime1::primitive_arraycopy(HeapWord* src, HeapWord* dst, int length))
1149 #ifndef PRODUCT
1150 _primitive_arraycopy_cnt++;
1151 #endif
1152
1153 if (length == 0) return;
1154 // Not guaranteed to be word atomic, but that doesn't matter
1155 // for anything but an oop array, which is covered by oop_arraycopy.
1156 Copy::conjoint_bytes(src, dst, length);
1157 JRT_END
1158
1159 JRT_LEAF(void, Runtime1::oop_arraycopy(HeapWord* src, HeapWord* dst, int num))
1160 #ifndef PRODUCT
1161 _oop_arraycopy_cnt++;
1162 #endif
1163
1164 if (num == 0) return;
1165 Copy::conjoint_oops_atomic((oop*) src, (oop*) dst, num);
1166 BarrierSet* bs = Universe::heap()->barrier_set();
1167 bs->write_ref_array(MemRegion(dst, dst + num));
1168 JRT_END
1169
1170
1171 #ifndef PRODUCT
1172 void Runtime1::print_statistics() {
1173 tty->print_cr("C1 Runtime statistics:");
1174 tty->print_cr(" _resolve_invoke_virtual_cnt: %d", SharedRuntime::_resolve_virtual_ctr);
1175 tty->print_cr(" _resolve_invoke_opt_virtual_cnt: %d", SharedRuntime::_resolve_opt_virtual_ctr);
1176 tty->print_cr(" _resolve_invoke_static_cnt: %d", SharedRuntime::_resolve_static_ctr);
1177 tty->print_cr(" _handle_wrong_method_cnt: %d", SharedRuntime::_wrong_method_ctr);
1178 tty->print_cr(" _ic_miss_cnt: %d", SharedRuntime::_ic_miss_ctr);
1179 tty->print_cr(" _generic_arraycopy_cnt: %d", _generic_arraycopy_cnt);
1180 tty->print_cr(" _primitive_arraycopy_cnt: %d", _primitive_arraycopy_cnt);
1181 tty->print_cr(" _oop_arraycopy_cnt: %d", _oop_arraycopy_cnt);
1182 tty->print_cr(" _arraycopy_slowcase_cnt: %d", _arraycopy_slowcase_cnt);
1183
1184 tty->print_cr(" _new_type_array_slowcase_cnt: %d", _new_type_array_slowcase_cnt);
1185 tty->print_cr(" _new_object_array_slowcase_cnt: %d", _new_object_array_slowcase_cnt);
1186 tty->print_cr(" _new_instance_slowcase_cnt: %d", _new_instance_slowcase_cnt);
1187 tty->print_cr(" _new_multi_array_slowcase_cnt: %d", _new_multi_array_slowcase_cnt);
1188 tty->print_cr(" _monitorenter_slowcase_cnt: %d", _monitorenter_slowcase_cnt);
1189 tty->print_cr(" _monitorexit_slowcase_cnt: %d", _monitorexit_slowcase_cnt);
1190 tty->print_cr(" _patch_code_slowcase_cnt: %d", _patch_code_slowcase_cnt);
1191
1192 tty->print_cr(" _throw_range_check_exception_count: %d:", _throw_range_check_exception_count);
1193 tty->print_cr(" _throw_index_exception_count: %d:", _throw_index_exception_count);
1194 tty->print_cr(" _throw_div0_exception_count: %d:", _throw_div0_exception_count);
1195 tty->print_cr(" _throw_null_pointer_exception_count: %d:", _throw_null_pointer_exception_count);
1196 tty->print_cr(" _throw_class_cast_exception_count: %d:", _throw_class_cast_exception_count);
1197 tty->print_cr(" _throw_incompatible_class_change_error_count: %d:", _throw_incompatible_class_change_error_count);
1198 tty->print_cr(" _throw_array_store_exception_count: %d:", _throw_array_store_exception_count);
1199 tty->print_cr(" _throw_count: %d:", _throw_count);
1200
1201 SharedRuntime::print_ic_miss_histogram();
1202 tty->cr();
1203 }
1204 #endif // PRODUCT