1 /*
2 * Copyright (c) 1999, 2025, 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 "asm/codeBuffer.hpp"
27 #include "c1/c1_CodeStubs.hpp"
28 #include "c1/c1_Defs.hpp"
29 #include "c1/c1_FrameMap.hpp"
30 #include "c1/c1_LIRAssembler.hpp"
31 #include "c1/c1_MacroAssembler.hpp"
32 #include "c1/c1_Runtime1.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/vmClasses.hpp"
35 #include "classfile/vmSymbols.hpp"
36 #include "code/codeBlob.hpp"
37 #include "code/compiledIC.hpp"
38 #include "code/pcDesc.hpp"
39 #include "code/scopeDesc.hpp"
40 #include "code/vtableStubs.hpp"
41 #include "compiler/compilationPolicy.hpp"
42 #include "compiler/disassembler.hpp"
43 #include "compiler/oopMap.hpp"
44 #include "gc/shared/barrierSet.hpp"
45 #include "gc/shared/c1/barrierSetC1.hpp"
46 #include "gc/shared/collectedHeap.hpp"
47 #include "interpreter/bytecode.hpp"
48 #include "interpreter/interpreter.hpp"
49 #include "jfr/support/jfrIntrinsics.hpp"
50 #include "logging/log.hpp"
51 #include "memory/allocation.inline.hpp"
52 #include "memory/oopFactory.hpp"
53 #include "memory/resourceArea.hpp"
54 #include "memory/universe.hpp"
55 #include "oops/access.inline.hpp"
56 #include "oops/flatArrayKlass.hpp"
57 #include "oops/flatArrayOop.inline.hpp"
58 #include "oops/klass.inline.hpp"
59 #include "oops/objArrayOop.inline.hpp"
60 #include "oops/objArrayKlass.hpp"
61 #include "oops/oop.inline.hpp"
62 #include "prims/jvmtiExport.hpp"
63 #include "runtime/atomic.hpp"
64 #include "runtime/fieldDescriptor.inline.hpp"
65 #include "runtime/frame.inline.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/interfaceSupport.inline.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/sharedRuntime.hpp"
70 #include "runtime/stackWatermarkSet.hpp"
71 #include "runtime/stubRoutines.hpp"
72 #include "runtime/threadCritical.hpp"
73 #include "runtime/vframe.inline.hpp"
74 #include "runtime/vframeArray.hpp"
75 #include "runtime/vm_version.hpp"
76 #include "utilities/copy.hpp"
77 #include "utilities/events.hpp"
78
79
80 // Implementation of StubAssembler
81
82 StubAssembler::StubAssembler(CodeBuffer* code, const char * name, int stub_id) : C1_MacroAssembler(code) {
83 _name = name;
84 _must_gc_arguments = false;
85 _frame_size = no_frame_size;
86 _num_rt_args = 0;
87 _stub_id = stub_id;
88 }
89
90
91 void StubAssembler::set_info(const char* name, bool must_gc_arguments) {
92 _name = name;
93 _must_gc_arguments = must_gc_arguments;
94 }
95
96
97 void StubAssembler::set_frame_size(int size) {
98 if (_frame_size == no_frame_size) {
99 _frame_size = size;
100 }
101 assert(_frame_size == size, "can't change the frame size");
102 }
103
104
105 void StubAssembler::set_num_rt_args(int args) {
106 if (_num_rt_args == 0) {
107 _num_rt_args = args;
108 }
109 assert(_num_rt_args == args, "can't change the number of args");
110 }
111
112 // Implementation of Runtime1
113
114 CodeBlob* Runtime1::_blobs[(int)C1StubId::NUM_STUBIDS];
115
116 #define C1_BLOB_NAME_DEFINE(name) "C1 Runtime " # name "_blob",
117 const char *Runtime1::_blob_names[] = {
118 C1_STUBS_DO(C1_BLOB_NAME_DEFINE)
119 };
120 #undef C1_STUB_NAME_DEFINE
121
122 #ifndef PRODUCT
123 // statistics
124 uint Runtime1::_generic_arraycopystub_cnt = 0;
125 uint Runtime1::_arraycopy_slowcase_cnt = 0;
126 uint Runtime1::_arraycopy_checkcast_cnt = 0;
127 uint Runtime1::_arraycopy_checkcast_attempt_cnt = 0;
128 uint Runtime1::_new_type_array_slowcase_cnt = 0;
129 uint Runtime1::_new_object_array_slowcase_cnt = 0;
130 uint Runtime1::_new_null_free_array_slowcase_cnt = 0;
131 uint Runtime1::_new_instance_slowcase_cnt = 0;
132 uint Runtime1::_new_multi_array_slowcase_cnt = 0;
133 uint Runtime1::_load_flat_array_slowcase_cnt = 0;
134 uint Runtime1::_store_flat_array_slowcase_cnt = 0;
135 uint Runtime1::_substitutability_check_slowcase_cnt = 0;
136 uint Runtime1::_buffer_inline_args_slowcase_cnt = 0;
137 uint Runtime1::_buffer_inline_args_no_receiver_slowcase_cnt = 0;
138 uint Runtime1::_monitorenter_slowcase_cnt = 0;
139 uint Runtime1::_monitorexit_slowcase_cnt = 0;
140 uint Runtime1::_patch_code_slowcase_cnt = 0;
141 uint Runtime1::_throw_range_check_exception_count = 0;
142 uint Runtime1::_throw_index_exception_count = 0;
143 uint Runtime1::_throw_div0_exception_count = 0;
144 uint Runtime1::_throw_null_pointer_exception_count = 0;
145 uint Runtime1::_throw_class_cast_exception_count = 0;
146 uint Runtime1::_throw_incompatible_class_change_error_count = 0;
147 uint Runtime1::_throw_illegal_monitor_state_exception_count = 0;
148 uint Runtime1::_throw_identity_exception_count = 0;
149 uint Runtime1::_throw_count = 0;
150
151 static uint _byte_arraycopy_stub_cnt = 0;
152 static uint _short_arraycopy_stub_cnt = 0;
153 static uint _int_arraycopy_stub_cnt = 0;
154 static uint _long_arraycopy_stub_cnt = 0;
155 static uint _oop_arraycopy_stub_cnt = 0;
156
157 address Runtime1::arraycopy_count_address(BasicType type) {
158 switch (type) {
159 case T_BOOLEAN:
160 case T_BYTE: return (address)&_byte_arraycopy_stub_cnt;
161 case T_CHAR:
162 case T_SHORT: return (address)&_short_arraycopy_stub_cnt;
163 case T_FLOAT:
164 case T_INT: return (address)&_int_arraycopy_stub_cnt;
165 case T_DOUBLE:
166 case T_LONG: return (address)&_long_arraycopy_stub_cnt;
167 case T_ARRAY:
168 case T_OBJECT: return (address)&_oop_arraycopy_stub_cnt;
169 default:
170 ShouldNotReachHere();
171 return nullptr;
172 }
173 }
174
175
176 #endif
177
178 // Simple helper to see if the caller of a runtime stub which
179 // entered the VM has been deoptimized
180
181 static bool caller_is_deopted(JavaThread* current) {
182 RegisterMap reg_map(current,
183 RegisterMap::UpdateMap::skip,
184 RegisterMap::ProcessFrames::include,
185 RegisterMap::WalkContinuation::skip);
186 frame runtime_frame = current->last_frame();
187 frame caller_frame = runtime_frame.sender(®_map);
188 assert(caller_frame.is_compiled_frame(), "must be compiled");
189 return caller_frame.is_deoptimized_frame();
190 }
191
192 // Stress deoptimization
193 static void deopt_caller(JavaThread* current) {
194 if (!caller_is_deopted(current)) {
195 RegisterMap reg_map(current,
196 RegisterMap::UpdateMap::skip,
197 RegisterMap::ProcessFrames::include,
198 RegisterMap::WalkContinuation::skip);
199 frame runtime_frame = current->last_frame();
200 frame caller_frame = runtime_frame.sender(®_map);
201 Deoptimization::deoptimize_frame(current, caller_frame.id());
202 assert(caller_is_deopted(current), "Must be deoptimized");
203 }
204 }
205
206 class C1StubIdStubAssemblerCodeGenClosure: public StubAssemblerCodeGenClosure {
207 private:
208 C1StubId _id;
209 public:
210 C1StubIdStubAssemblerCodeGenClosure(C1StubId id) : _id(id) {}
211 virtual OopMapSet* generate_code(StubAssembler* sasm) {
212 return Runtime1::generate_code_for(_id, sasm);
213 }
214 };
215
216 CodeBlob* Runtime1::generate_blob(BufferBlob* buffer_blob, C1StubId id, const char* name, bool expect_oop_map, StubAssemblerCodeGenClosure* cl) {
217 ResourceMark rm;
218 // create code buffer for code storage
219 CodeBuffer code(buffer_blob);
220
221 OopMapSet* oop_maps;
222 int frame_size;
223 bool must_gc_arguments;
224
225 Compilation::setup_code_buffer(&code, 0);
226
227 // create assembler for code generation
228 StubAssembler* sasm = new StubAssembler(&code, name, (int)id);
229 // generate code for runtime stub
230 oop_maps = cl->generate_code(sasm);
231 assert(oop_maps == nullptr || sasm->frame_size() != no_frame_size,
232 "if stub has an oop map it must have a valid frame size");
233 assert(!expect_oop_map || oop_maps != nullptr, "must have an oopmap");
234
235 // align so printing shows nop's instead of random code at the end (SimpleStubs are aligned)
236 sasm->align(BytesPerWord);
237 // make sure all code is in code buffer
238 sasm->flush();
239
240 frame_size = sasm->frame_size();
241 must_gc_arguments = sasm->must_gc_arguments();
242 // create blob - distinguish a few special cases
243 CodeBlob* blob = RuntimeStub::new_runtime_stub(name,
244 &code,
245 CodeOffsets::frame_never_safe,
246 frame_size,
247 oop_maps,
248 must_gc_arguments);
249 assert(blob != nullptr, "blob must exist");
250 return blob;
251 }
252
253 void Runtime1::generate_blob_for(BufferBlob* buffer_blob, C1StubId id) {
254 assert(C1StubId::NO_STUBID < id && id < C1StubId::NUM_STUBIDS, "illegal stub id");
255 bool expect_oop_map = true;
256 #ifdef ASSERT
257 // Make sure that stubs that need oopmaps have them
258 switch (id) {
259 // These stubs don't need to have an oopmap
260 case C1StubId::dtrace_object_alloc_id:
261 case C1StubId::slow_subtype_check_id:
262 case C1StubId::fpu2long_stub_id:
263 case C1StubId::unwind_exception_id:
264 case C1StubId::counter_overflow_id:
265 expect_oop_map = false;
266 break;
267 default:
268 break;
269 }
270 #endif
271 C1StubIdStubAssemblerCodeGenClosure cl(id);
272 CodeBlob* blob = generate_blob(buffer_blob, id, name_for(id), expect_oop_map, &cl);
273 // install blob
274 _blobs[(int)id] = blob;
275 }
276
277 void Runtime1::initialize(BufferBlob* blob) {
278 // platform-dependent initialization
279 initialize_pd();
280 // generate stubs
281 int limit = (int)C1StubId::NUM_STUBIDS;
282 for (int id = 0; id < limit; id++) generate_blob_for(blob, (C1StubId)id);
283 // printing
284 #ifndef PRODUCT
285 if (PrintSimpleStubs) {
286 ResourceMark rm;
287 for (int id = 0; id < limit; id++) {
288 _blobs[id]->print();
289 if (_blobs[id]->oop_maps() != nullptr) {
290 _blobs[id]->oop_maps()->print();
291 }
292 }
293 }
294 #endif
295 BarrierSetC1* bs = BarrierSet::barrier_set()->barrier_set_c1();
296 bs->generate_c1_runtime_stubs(blob);
297 }
298
299 CodeBlob* Runtime1::blob_for(C1StubId id) {
300 assert(C1StubId::NO_STUBID < id && id < C1StubId::NUM_STUBIDS, "illegal stub id");
301 return _blobs[(int)id];
302 }
303
304
305 const char* Runtime1::name_for(C1StubId id) {
306 assert(C1StubId::NO_STUBID < id && id < C1StubId::NUM_STUBIDS, "illegal stub id");
307 return _blob_names[(int)id];
308 }
309
310 const char* Runtime1::name_for_address(address entry) {
311 int limit = (int)C1StubId::NUM_STUBIDS;
312 for (int i = 0; i < limit; i++) {
313 C1StubId id = (C1StubId)i;
314 if (entry == entry_for(id)) return name_for(id);
315 }
316
317 #define FUNCTION_CASE(a, f) \
318 if ((intptr_t)a == CAST_FROM_FN_PTR(intptr_t, f)) return #f
319
320 FUNCTION_CASE(entry, os::javaTimeMillis);
321 FUNCTION_CASE(entry, os::javaTimeNanos);
322 FUNCTION_CASE(entry, SharedRuntime::OSR_migration_end);
323 FUNCTION_CASE(entry, SharedRuntime::d2f);
324 FUNCTION_CASE(entry, SharedRuntime::d2i);
325 FUNCTION_CASE(entry, SharedRuntime::d2l);
326 FUNCTION_CASE(entry, SharedRuntime::dcos);
327 FUNCTION_CASE(entry, SharedRuntime::dexp);
328 FUNCTION_CASE(entry, SharedRuntime::dlog);
329 FUNCTION_CASE(entry, SharedRuntime::dlog10);
330 FUNCTION_CASE(entry, SharedRuntime::dpow);
331 FUNCTION_CASE(entry, SharedRuntime::drem);
332 FUNCTION_CASE(entry, SharedRuntime::dsin);
333 FUNCTION_CASE(entry, SharedRuntime::dtan);
334 FUNCTION_CASE(entry, SharedRuntime::f2i);
335 FUNCTION_CASE(entry, SharedRuntime::f2l);
336 FUNCTION_CASE(entry, SharedRuntime::frem);
337 FUNCTION_CASE(entry, SharedRuntime::l2d);
338 FUNCTION_CASE(entry, SharedRuntime::l2f);
339 FUNCTION_CASE(entry, SharedRuntime::ldiv);
340 FUNCTION_CASE(entry, SharedRuntime::lmul);
341 FUNCTION_CASE(entry, SharedRuntime::lrem);
342 FUNCTION_CASE(entry, SharedRuntime::lrem);
343 FUNCTION_CASE(entry, SharedRuntime::dtrace_method_entry);
344 FUNCTION_CASE(entry, SharedRuntime::dtrace_method_exit);
345 FUNCTION_CASE(entry, is_instance_of);
346 FUNCTION_CASE(entry, trace_block_entry);
347 #ifdef JFR_HAVE_INTRINSICS
348 FUNCTION_CASE(entry, JfrTime::time_function());
349 #endif
350 FUNCTION_CASE(entry, StubRoutines::updateBytesCRC32());
351 FUNCTION_CASE(entry, StubRoutines::updateBytesCRC32C());
352 FUNCTION_CASE(entry, StubRoutines::vectorizedMismatch());
353 FUNCTION_CASE(entry, StubRoutines::dexp());
354 FUNCTION_CASE(entry, StubRoutines::dlog());
355 FUNCTION_CASE(entry, StubRoutines::dlog10());
356 FUNCTION_CASE(entry, StubRoutines::dpow());
357 FUNCTION_CASE(entry, StubRoutines::dsin());
358 FUNCTION_CASE(entry, StubRoutines::dcos());
359 FUNCTION_CASE(entry, StubRoutines::dtan());
360 FUNCTION_CASE(entry, StubRoutines::dtanh());
361
362 #undef FUNCTION_CASE
363
364 // Soft float adds more runtime names.
365 return pd_name_for_address(entry);
366 }
367
368 static void allocate_instance(JavaThread* current, Klass* klass, TRAPS) {
369 #ifndef PRODUCT
370 if (PrintC1Statistics) {
371 Runtime1::_new_instance_slowcase_cnt++;
372 }
373 #endif
374 assert(klass->is_klass(), "not a class");
375 Handle holder(current, klass->klass_holder()); // keep the klass alive
376 InstanceKlass* h = InstanceKlass::cast(klass);
377 h->check_valid_for_instantiation(true, CHECK);
378 // make sure klass is initialized
379 h->initialize(CHECK);
380 oop obj = nullptr;
381 if (h->is_inline_klass() && InlineKlass::cast(h)->is_empty_inline_type()) {
382 obj = InlineKlass::cast(h)->default_value();
383 assert(obj != nullptr, "default value must exist");
384 } else {
385 // allocate instance and return via TLS
386 obj = h->allocate_instance(CHECK);
387 }
388 current->set_vm_result(obj);
389 JRT_END
390
391 JRT_ENTRY(void, Runtime1::new_instance(JavaThread* current, Klass* klass))
392 allocate_instance(current, klass, CHECK);
393 JRT_END
394
395 JRT_ENTRY(void, Runtime1::new_type_array(JavaThread* current, Klass* klass, jint length))
396 #ifndef PRODUCT
397 if (PrintC1Statistics) {
398 _new_type_array_slowcase_cnt++;
399 }
400 #endif
401 // Note: no handle for klass needed since they are not used
402 // anymore after new_typeArray() and no GC can happen before.
403 // (This may have to change if this code changes!)
404 assert(klass->is_klass(), "not a class");
405 BasicType elt_type = TypeArrayKlass::cast(klass)->element_type();
406 oop obj = oopFactory::new_typeArray(elt_type, length, CHECK);
407 current->set_vm_result(obj);
408 // This is pretty rare but this runtime patch is stressful to deoptimization
409 // if we deoptimize here so force a deopt to stress the path.
410 if (DeoptimizeALot) {
411 deopt_caller(current);
412 }
413
414 JRT_END
415
416
417 JRT_ENTRY(void, Runtime1::new_object_array(JavaThread* current, Klass* array_klass, jint length))
418 #ifndef PRODUCT
419 if (PrintC1Statistics) {
420 _new_object_array_slowcase_cnt++;
421 }
422 #endif
423 // Note: no handle for klass needed since they are not used
424 // anymore after new_objArray() and no GC can happen before.
425 // (This may have to change if this code changes!)
426 assert(array_klass->is_klass(), "not a class");
427 Handle holder(current, array_klass->klass_holder()); // keep the klass alive
428 Klass* elem_klass = ArrayKlass::cast(array_klass)->element_klass();
429 objArrayOop obj = oopFactory::new_objArray(elem_klass, length, CHECK);
430 current->set_vm_result(obj);
431 // This is pretty rare but this runtime patch is stressful to deoptimization
432 // if we deoptimize here so force a deopt to stress the path.
433 if (DeoptimizeALot) {
434 deopt_caller(current);
435 }
436 JRT_END
437
438
439 JRT_ENTRY(void, Runtime1::new_null_free_array(JavaThread* current, Klass* array_klass, jint length))
440 NOT_PRODUCT(_new_null_free_array_slowcase_cnt++;)
441
442 // Note: no handle for klass needed since they are not used
443 // anymore after new_objArray() and no GC can happen before.
444 // (This may have to change if this code changes!)
445 assert(array_klass->is_klass(), "not a class");
446 Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive
447 Klass* elem_klass = ArrayKlass::cast(array_klass)->element_klass();
448 assert(elem_klass->is_inline_klass(), "must be");
449 InlineKlass* vk = InlineKlass::cast(elem_klass);
450 // Logically creates elements, ensure klass init
451 elem_klass->initialize(CHECK);
452 arrayOop obj= nullptr;
453 // Limitation here, only non-atomic layouts are supported
454 if (UseFlatArray && vk->has_non_atomic_layout()) {
455 obj = oopFactory::new_flatArray(elem_klass, length, LayoutKind::NON_ATOMIC_FLAT, CHECK);
456 } else {
457 obj = oopFactory::new_null_free_objArray(elem_klass, length, CHECK);
458 }
459 current->set_vm_result(obj);
460 // This is pretty rare but this runtime patch is stressful to deoptimization
461 // if we deoptimize here so force a deopt to stress the path.
462 if (DeoptimizeALot) {
463 deopt_caller(current);
464 }
465 JRT_END
466
467
468 JRT_ENTRY(void, Runtime1::new_multi_array(JavaThread* current, Klass* klass, int rank, jint* dims))
469 #ifndef PRODUCT
470 if (PrintC1Statistics) {
471 _new_multi_array_slowcase_cnt++;
472 }
473 #endif
474 assert(klass->is_klass(), "not a class");
475 assert(rank >= 1, "rank must be nonzero");
476 Handle holder(current, klass->klass_holder()); // keep the klass alive
477 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
478 current->set_vm_result(obj);
479 JRT_END
480
481
482 static void profile_flat_array(JavaThread* current, bool load) {
483 ResourceMark rm(current);
484 vframeStream vfst(current, true);
485 assert(!vfst.at_end(), "Java frame must exist");
486 // Check if array access profiling is enabled
487 if (vfst.nm()->comp_level() != CompLevel_full_profile || !C1UpdateMethodData) {
488 return;
489 }
490 int bci = vfst.bci();
491 Method* method = vfst.method();
492 MethodData* md = method->method_data();
493 if (md != nullptr) {
494 // Lock to access ProfileData, and ensure lock is not broken by a safepoint
495 MutexLocker ml(md->extra_data_lock(), Mutex::_no_safepoint_check_flag);
496
497 ProfileData* data = md->bci_to_data(bci);
498 assert(data != nullptr, "incorrect profiling entry");
499 if (data->is_ArrayLoadData()) {
500 assert(load, "should be an array load");
501 ArrayLoadData* load_data = (ArrayLoadData*) data;
502 load_data->set_flat_array();
503 } else {
504 assert(data->is_ArrayStoreData(), "");
505 assert(!load, "should be an array store");
506 ArrayStoreData* store_data = (ArrayStoreData*) data;
507 store_data->set_flat_array();
508 }
509 }
510 }
511
512 JRT_ENTRY(void, Runtime1::load_flat_array(JavaThread* current, flatArrayOopDesc* array, int index))
513 assert(array->klass()->is_flatArray_klass(), "should not be called");
514 profile_flat_array(current, true);
515
516 NOT_PRODUCT(_load_flat_array_slowcase_cnt++;)
517 assert(array->length() > 0 && index < array->length(), "already checked");
518 flatArrayHandle vah(current, array);
519 oop obj = array->read_value_from_flat_array(index, CHECK);
520 current->set_vm_result(obj);
521 JRT_END
522
523
524 JRT_ENTRY(void, Runtime1::store_flat_array(JavaThread* current, flatArrayOopDesc* array, int index, oopDesc* value))
525 if (array->klass()->is_flatArray_klass()) {
526 profile_flat_array(current, false);
527 }
528
529 NOT_PRODUCT(_store_flat_array_slowcase_cnt++;)
530 if (value == nullptr) {
531 assert(array->klass()->is_flatArray_klass() || array->klass()->is_null_free_array_klass(), "should not be called");
532 SharedRuntime::throw_and_post_jvmti_exception(current, vmSymbols::java_lang_NullPointerException());
533 } else {
534 assert(array->klass()->is_flatArray_klass(), "should not be called");
535 array->write_value_to_flat_array(value, index, CHECK);
536 }
537 JRT_END
538
539
540 JRT_ENTRY(int, Runtime1::substitutability_check(JavaThread* current, oopDesc* left, oopDesc* right))
541 NOT_PRODUCT(_substitutability_check_slowcase_cnt++;)
542 JavaCallArguments args;
543 args.push_oop(Handle(THREAD, left));
544 args.push_oop(Handle(THREAD, right));
545 JavaValue result(T_BOOLEAN);
546 JavaCalls::call_static(&result,
547 vmClasses::ValueObjectMethods_klass(),
548 vmSymbols::isSubstitutable_name(),
549 vmSymbols::object_object_boolean_signature(),
550 &args, CHECK_0);
551 return result.get_jboolean() ? 1 : 0;
552 JRT_END
553
554
555 extern "C" void ps();
556
557 void Runtime1::buffer_inline_args_impl(JavaThread* current, Method* m, bool allocate_receiver) {
558 JavaThread* THREAD = current;
559 methodHandle method(current, m); // We are inside the verified_entry or verified_inline_ro_entry of this method.
560 oop obj = SharedRuntime::allocate_inline_types_impl(current, method, allocate_receiver, CHECK);
561 current->set_vm_result(obj);
562 }
563
564 JRT_ENTRY(void, Runtime1::buffer_inline_args(JavaThread* current, Method* method))
565 NOT_PRODUCT(_buffer_inline_args_slowcase_cnt++;)
566 buffer_inline_args_impl(current, method, true);
567 JRT_END
568
569 JRT_ENTRY(void, Runtime1::buffer_inline_args_no_receiver(JavaThread* current, Method* method))
570 NOT_PRODUCT(_buffer_inline_args_no_receiver_slowcase_cnt++;)
571 buffer_inline_args_impl(current, method, false);
572 JRT_END
573
574 JRT_ENTRY(void, Runtime1::unimplemented_entry(JavaThread* current, C1StubId id))
575 tty->print_cr("Runtime1::entry_for(%d) returned unimplemented entry point", (int)id);
576 JRT_END
577
578
579 JRT_ENTRY(void, Runtime1::throw_array_store_exception(JavaThread* current, oopDesc* obj))
580 ResourceMark rm(current);
581 const char* klass_name = obj->klass()->external_name();
582 SharedRuntime::throw_and_post_jvmti_exception(current, vmSymbols::java_lang_ArrayStoreException(), klass_name);
583 JRT_END
584
585
586 // counter_overflow() is called from within C1-compiled methods. The enclosing method is the method
587 // associated with the top activation record. The inlinee (that is possibly included in the enclosing
588 // method) method is passed as an argument. In order to do that it is embedded in the code as
589 // a constant.
590 static nmethod* counter_overflow_helper(JavaThread* current, int branch_bci, Method* m) {
591 nmethod* osr_nm = nullptr;
592 methodHandle method(current, m);
593
594 RegisterMap map(current,
595 RegisterMap::UpdateMap::skip,
596 RegisterMap::ProcessFrames::include,
597 RegisterMap::WalkContinuation::skip);
598 frame fr = current->last_frame().sender(&map);
599 nmethod* nm = (nmethod*) fr.cb();
600 assert(nm!= nullptr && nm->is_nmethod(), "Sanity check");
601 methodHandle enclosing_method(current, nm->method());
602
603 CompLevel level = (CompLevel)nm->comp_level();
604 int bci = InvocationEntryBci;
605 if (branch_bci != InvocationEntryBci) {
606 // Compute destination bci
607 address pc = method()->code_base() + branch_bci;
608 Bytecodes::Code branch = Bytecodes::code_at(method(), pc);
609 int offset = 0;
610 switch (branch) {
611 case Bytecodes::_if_icmplt: case Bytecodes::_iflt:
612 case Bytecodes::_if_icmpgt: case Bytecodes::_ifgt:
613 case Bytecodes::_if_icmple: case Bytecodes::_ifle:
614 case Bytecodes::_if_icmpge: case Bytecodes::_ifge:
615 case Bytecodes::_if_icmpeq: case Bytecodes::_if_acmpeq: case Bytecodes::_ifeq:
616 case Bytecodes::_if_icmpne: case Bytecodes::_if_acmpne: case Bytecodes::_ifne:
617 case Bytecodes::_ifnull: case Bytecodes::_ifnonnull: case Bytecodes::_goto:
618 offset = (int16_t)Bytes::get_Java_u2(pc + 1);
619 break;
620 case Bytecodes::_goto_w:
621 offset = Bytes::get_Java_u4(pc + 1);
622 break;
623 default: ;
624 }
625 bci = branch_bci + offset;
626 }
627 osr_nm = CompilationPolicy::event(enclosing_method, method, branch_bci, bci, level, nm, current);
628 return osr_nm;
629 }
630
631 JRT_BLOCK_ENTRY(address, Runtime1::counter_overflow(JavaThread* current, int bci, Method* method))
632 nmethod* osr_nm;
633 JRT_BLOCK
634 osr_nm = counter_overflow_helper(current, bci, method);
635 if (osr_nm != nullptr) {
636 RegisterMap map(current,
637 RegisterMap::UpdateMap::skip,
638 RegisterMap::ProcessFrames::include,
639 RegisterMap::WalkContinuation::skip);
640 frame fr = current->last_frame().sender(&map);
641 Deoptimization::deoptimize_frame(current, fr.id());
642 }
643 JRT_BLOCK_END
644 return nullptr;
645 JRT_END
646
647 extern void vm_exit(int code);
648
649 // Enter this method from compiled code handler below. This is where we transition
650 // to VM mode. This is done as a helper routine so that the method called directly
651 // from compiled code does not have to transition to VM. This allows the entry
652 // method to see if the nmethod that we have just looked up a handler for has
653 // been deoptimized while we were in the vm. This simplifies the assembly code
654 // cpu directories.
655 //
656 // We are entering here from exception stub (via the entry method below)
657 // If there is a compiled exception handler in this method, we will continue there;
658 // otherwise we will unwind the stack and continue at the caller of top frame method
659 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
660 // control the area where we can allow a safepoint. After we exit the safepoint area we can
661 // check to see if the handler we are going to return is now in a nmethod that has
662 // been deoptimized. If that is the case we return the deopt blob
663 // unpack_with_exception entry instead. This makes life for the exception blob easier
664 // because making that same check and diverting is painful from assembly language.
665 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* current, oopDesc* ex, address pc, nmethod*& nm))
666 // Reset method handle flag.
667 current->set_is_method_handle_return(false);
668
669 Handle exception(current, ex);
670
671 // This function is called when we are about to throw an exception. Therefore,
672 // we have to poll the stack watermark barrier to make sure that not yet safe
673 // stack frames are made safe before returning into them.
674 if (current->last_frame().cb() == Runtime1::blob_for(C1StubId::handle_exception_from_callee_id)) {
675 // The C1StubId::handle_exception_from_callee_id handler is invoked after the
676 // frame has been unwound. It instead builds its own stub frame, to call the
677 // runtime. But the throwing frame has already been unwound here.
678 StackWatermarkSet::after_unwind(current);
679 }
680
681 nm = CodeCache::find_nmethod(pc);
682 assert(nm != nullptr, "this is not an nmethod");
683 // Adjust the pc as needed/
684 if (nm->is_deopt_pc(pc)) {
685 RegisterMap map(current,
686 RegisterMap::UpdateMap::skip,
687 RegisterMap::ProcessFrames::include,
688 RegisterMap::WalkContinuation::skip);
689 frame exception_frame = current->last_frame().sender(&map);
690 // if the frame isn't deopted then pc must not correspond to the caller of last_frame
691 assert(exception_frame.is_deoptimized_frame(), "must be deopted");
692 pc = exception_frame.pc();
693 }
694 assert(exception.not_null(), "null exceptions should be handled by throw_exception");
695 // Check that exception is a subclass of Throwable
696 assert(exception->is_a(vmClasses::Throwable_klass()),
697 "Exception not subclass of Throwable");
698
699 // debugging support
700 // tracing
701 if (log_is_enabled(Info, exceptions)) {
702 ResourceMark rm; // print_value_string
703 stringStream tempst;
704 assert(nm->method() != nullptr, "Unexpected null method()");
705 tempst.print("C1 compiled method <%s>\n"
706 " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
707 nm->method()->print_value_string(), p2i(pc), p2i(current));
708 Exceptions::log_exception(exception, tempst.freeze());
709 }
710 // for AbortVMOnException flag
711 Exceptions::debug_check_abort(exception);
712
713 // Check the stack guard pages and re-enable them if necessary and there is
714 // enough space on the stack to do so. Use fast exceptions only if the guard
715 // pages are enabled.
716 bool guard_pages_enabled = current->stack_overflow_state()->reguard_stack_if_needed();
717
718 if (JvmtiExport::can_post_on_exceptions()) {
719 // To ensure correct notification of exception catches and throws
720 // we have to deoptimize here. If we attempted to notify the
721 // catches and throws during this exception lookup it's possible
722 // we could deoptimize on the way out of the VM and end back in
723 // the interpreter at the throw site. This would result in double
724 // notifications since the interpreter would also notify about
725 // these same catches and throws as it unwound the frame.
726
727 RegisterMap reg_map(current,
728 RegisterMap::UpdateMap::include,
729 RegisterMap::ProcessFrames::include,
730 RegisterMap::WalkContinuation::skip);
731 frame stub_frame = current->last_frame();
732 frame caller_frame = stub_frame.sender(®_map);
733
734 // We don't really want to deoptimize the nmethod itself since we
735 // can actually continue in the exception handler ourselves but I
736 // don't see an easy way to have the desired effect.
737 Deoptimization::deoptimize_frame(current, caller_frame.id());
738 assert(caller_is_deopted(current), "Must be deoptimized");
739
740 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
741 }
742
743 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
744 if (guard_pages_enabled) {
745 address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);
746 if (fast_continuation != nullptr) {
747 // Set flag if return address is a method handle call site.
748 current->set_is_method_handle_return(nm->is_method_handle_return(pc));
749 return fast_continuation;
750 }
751 }
752
753 // If the stack guard pages are enabled, check whether there is a handler in
754 // the current method. Otherwise (guard pages disabled), force an unwind and
755 // skip the exception cache update (i.e., just leave continuation as null).
756 address continuation = nullptr;
757 if (guard_pages_enabled) {
758
759 // New exception handling mechanism can support inlined methods
760 // with exception handlers since the mappings are from PC to PC
761
762 // Clear out the exception oop and pc since looking up an
763 // exception handler can cause class loading, which might throw an
764 // exception and those fields are expected to be clear during
765 // normal bytecode execution.
766 current->clear_exception_oop_and_pc();
767
768 bool recursive_exception = false;
769 continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false, recursive_exception);
770 // If an exception was thrown during exception dispatch, the exception oop may have changed
771 current->set_exception_oop(exception());
772 current->set_exception_pc(pc);
773
774 // the exception cache is used only by non-implicit exceptions
775 // Update the exception cache only when there didn't happen
776 // another exception during the computation of the compiled
777 // exception handler. Checking for exception oop equality is not
778 // sufficient because some exceptions are pre-allocated and reused.
779 if (continuation != nullptr && !recursive_exception) {
780 nm->add_handler_for_exception_and_pc(exception, pc, continuation);
781 }
782 }
783
784 current->set_vm_result(exception());
785 // Set flag if return address is a method handle call site.
786 current->set_is_method_handle_return(nm->is_method_handle_return(pc));
787
788 if (log_is_enabled(Info, exceptions)) {
789 ResourceMark rm;
790 log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
791 " for exception thrown at PC " PTR_FORMAT,
792 p2i(current), p2i(continuation), p2i(pc));
793 }
794
795 return continuation;
796 JRT_END
797
798 // Enter this method from compiled code only if there is a Java exception handler
799 // in the method handling the exception.
800 // We are entering here from exception stub. We don't do a normal VM transition here.
801 // We do it in a helper. This is so we can check to see if the nmethod we have just
802 // searched for an exception handler has been deoptimized in the meantime.
803 address Runtime1::exception_handler_for_pc(JavaThread* current) {
804 oop exception = current->exception_oop();
805 address pc = current->exception_pc();
806 // Still in Java mode
807 DEBUG_ONLY(NoHandleMark nhm);
808 nmethod* nm = nullptr;
809 address continuation = nullptr;
810 {
811 // Enter VM mode by calling the helper
812 ResetNoHandleMark rnhm;
813 continuation = exception_handler_for_pc_helper(current, exception, pc, nm);
814 }
815 // Back in JAVA, use no oops DON'T safepoint
816
817 // Now check to see if the nmethod we were called from is now deoptimized.
818 // If so we must return to the deopt blob and deoptimize the nmethod
819 if (nm != nullptr && caller_is_deopted(current)) {
820 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
821 }
822
823 assert(continuation != nullptr, "no handler found");
824 return continuation;
825 }
826
827
828 JRT_ENTRY(void, Runtime1::throw_range_check_exception(JavaThread* current, int index, arrayOopDesc* a))
829 #ifndef PRODUCT
830 if (PrintC1Statistics) {
831 _throw_range_check_exception_count++;
832 }
833 #endif
834 const int len = 35;
835 assert(len < strlen("Index %d out of bounds for length %d"), "Must allocate more space for message.");
836 char message[2 * jintAsStringSize + len];
837 os::snprintf_checked(message, sizeof(message), "Index %d out of bounds for length %d", index, a->length());
838 SharedRuntime::throw_and_post_jvmti_exception(current, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message);
839 JRT_END
840
841
842 JRT_ENTRY(void, Runtime1::throw_index_exception(JavaThread* current, int index))
843 #ifndef PRODUCT
844 if (PrintC1Statistics) {
845 _throw_index_exception_count++;
846 }
847 #endif
848 char message[16];
849 os::snprintf_checked(message, sizeof(message), "%d", index);
850 SharedRuntime::throw_and_post_jvmti_exception(current, vmSymbols::java_lang_IndexOutOfBoundsException(), message);
851 JRT_END
852
853
854 JRT_ENTRY(void, Runtime1::throw_div0_exception(JavaThread* current))
855 #ifndef PRODUCT
856 if (PrintC1Statistics) {
857 _throw_div0_exception_count++;
858 }
859 #endif
860 SharedRuntime::throw_and_post_jvmti_exception(current, vmSymbols::java_lang_ArithmeticException(), "/ by zero");
861 JRT_END
862
863
864 JRT_ENTRY(void, Runtime1::throw_null_pointer_exception(JavaThread* current))
865 #ifndef PRODUCT
866 if (PrintC1Statistics) {
867 _throw_null_pointer_exception_count++;
868 }
869 #endif
870 SharedRuntime::throw_and_post_jvmti_exception(current, vmSymbols::java_lang_NullPointerException());
871 JRT_END
872
873
874 JRT_ENTRY(void, Runtime1::throw_class_cast_exception(JavaThread* current, oopDesc* object))
875 #ifndef PRODUCT
876 if (PrintC1Statistics) {
877 _throw_class_cast_exception_count++;
878 }
879 #endif
880 ResourceMark rm(current);
881 char* message = SharedRuntime::generate_class_cast_message(current, object->klass());
882 SharedRuntime::throw_and_post_jvmti_exception(current, vmSymbols::java_lang_ClassCastException(), message);
883 JRT_END
884
885
886 JRT_ENTRY(void, Runtime1::throw_incompatible_class_change_error(JavaThread* current))
887 #ifndef PRODUCT
888 if (PrintC1Statistics) {
889 _throw_incompatible_class_change_error_count++;
890 }
891 #endif
892 ResourceMark rm(current);
893 SharedRuntime::throw_and_post_jvmti_exception(current, vmSymbols::java_lang_IncompatibleClassChangeError());
894 JRT_END
895
896
897 JRT_ENTRY(void, Runtime1::throw_illegal_monitor_state_exception(JavaThread* current))
898 NOT_PRODUCT(_throw_illegal_monitor_state_exception_count++;)
899 ResourceMark rm(current);
900 SharedRuntime::throw_and_post_jvmti_exception(current, vmSymbols::java_lang_IllegalMonitorStateException());
901 JRT_END
902
903 JRT_ENTRY(void, Runtime1::throw_identity_exception(JavaThread* current, oopDesc* object))
904 NOT_PRODUCT(_throw_identity_exception_count++;)
905 ResourceMark rm(current);
906 char* message = SharedRuntime::generate_identity_exception_message(current, object->klass());
907 SharedRuntime::throw_and_post_jvmti_exception(current, vmSymbols::java_lang_IdentityException(), message);
908 JRT_END
909
910 JRT_BLOCK_ENTRY(void, Runtime1::monitorenter(JavaThread* current, oopDesc* obj, BasicObjectLock* lock))
911 #ifndef PRODUCT
912 if (PrintC1Statistics) {
913 _monitorenter_slowcase_cnt++;
914 }
915 #endif
916 if (LockingMode == LM_MONITOR) {
917 lock->set_obj(obj);
918 }
919 assert(obj == lock->obj(), "must match");
920 SharedRuntime::monitor_enter_helper(obj, lock->lock(), current);
921 JRT_END
922
923
924 JRT_LEAF(void, Runtime1::monitorexit(JavaThread* current, BasicObjectLock* lock))
925 assert(current == JavaThread::current(), "pre-condition");
926 #ifndef PRODUCT
927 if (PrintC1Statistics) {
928 _monitorexit_slowcase_cnt++;
929 }
930 #endif
931 assert(current->last_Java_sp(), "last_Java_sp must be set");
932 oop obj = lock->obj();
933 assert(oopDesc::is_oop(obj), "must be null or an object");
934 SharedRuntime::monitor_exit_helper(obj, lock->lock(), current);
935 JRT_END
936
937 // Cf. OptoRuntime::deoptimize_caller_frame
938 JRT_ENTRY(void, Runtime1::deoptimize(JavaThread* current, jint trap_request))
939 // Called from within the owner thread, so no need for safepoint
940 RegisterMap reg_map(current,
941 RegisterMap::UpdateMap::skip,
942 RegisterMap::ProcessFrames::include,
943 RegisterMap::WalkContinuation::skip);
944 frame stub_frame = current->last_frame();
945 assert(stub_frame.is_runtime_frame(), "Sanity check");
946 frame caller_frame = stub_frame.sender(®_map);
947 nmethod* nm = caller_frame.cb()->as_nmethod_or_null();
948 assert(nm != nullptr, "Sanity check");
949 methodHandle method(current, nm->method());
950 assert(nm == CodeCache::find_nmethod(caller_frame.pc()), "Should be the same");
951 Deoptimization::DeoptAction action = Deoptimization::trap_request_action(trap_request);
952 Deoptimization::DeoptReason reason = Deoptimization::trap_request_reason(trap_request);
953
954 if (action == Deoptimization::Action_make_not_entrant) {
955 if (nm->make_not_entrant()) {
956 if (reason == Deoptimization::Reason_tenured) {
957 MethodData* trap_mdo = Deoptimization::get_method_data(current, method, true /*create_if_missing*/);
958 if (trap_mdo != nullptr) {
959 trap_mdo->inc_tenure_traps();
960 }
961 }
962 }
963 }
964
965 // Deoptimize the caller frame.
966 Deoptimization::deoptimize_frame(current, caller_frame.id());
967 // Return to the now deoptimized frame.
968 JRT_END
969
970
971 #ifndef DEOPTIMIZE_WHEN_PATCHING
972
973 static Klass* resolve_field_return_klass(const methodHandle& caller, int bci, TRAPS) {
974 Bytecode_field field_access(caller, bci);
975 // This can be static or non-static field access
976 Bytecodes::Code code = field_access.code();
977
978 // We must load class, initialize class and resolve the field
979 fieldDescriptor result; // initialize class if needed
980 constantPoolHandle constants(THREAD, caller->constants());
981 LinkResolver::resolve_field_access(result, constants, field_access.index(), caller, Bytecodes::java_code(code), CHECK_NULL);
982 return result.field_holder();
983 }
984
985
986 //
987 // This routine patches sites where a class wasn't loaded or
988 // initialized at the time the code was generated. It handles
989 // references to classes, fields and forcing of initialization. Most
990 // of the cases are straightforward and involving simply forcing
991 // resolution of a class, rewriting the instruction stream with the
992 // needed constant and replacing the call in this function with the
993 // patched code. The case for static field is more complicated since
994 // the thread which is in the process of initializing a class can
995 // access it's static fields but other threads can't so the code
996 // either has to deoptimize when this case is detected or execute a
997 // check that the current thread is the initializing thread. The
998 // current
999 //
1000 // Patches basically look like this:
1001 //
1002 //
1003 // patch_site: jmp patch stub ;; will be patched
1004 // continue: ...
1005 // ...
1006 // ...
1007 // ...
1008 //
1009 // They have a stub which looks like this:
1010 //
1011 // ;; patch body
1012 // movl <const>, reg (for class constants)
1013 // <or> movl [reg1 + <const>], reg (for field offsets)
1014 // <or> movl reg, [reg1 + <const>] (for field offsets)
1015 // <being_init offset> <bytes to copy> <bytes to skip>
1016 // patch_stub: call Runtime1::patch_code (through a runtime stub)
1017 // jmp patch_site
1018 //
1019 //
1020 // A normal patch is done by rewriting the patch body, usually a move,
1021 // and then copying it into place over top of the jmp instruction
1022 // being careful to flush caches and doing it in an MP-safe way. The
1023 // constants following the patch body are used to find various pieces
1024 // of the patch relative to the call site for Runtime1::patch_code.
1025 // The case for getstatic and putstatic is more complicated because
1026 // getstatic and putstatic have special semantics when executing while
1027 // the class is being initialized. getstatic/putstatic on a class
1028 // which is being_initialized may be executed by the initializing
1029 // thread but other threads have to block when they execute it. This
1030 // is accomplished in compiled code by executing a test of the current
1031 // thread against the initializing thread of the class. It's emitted
1032 // as boilerplate in their stub which allows the patched code to be
1033 // executed before it's copied back into the main body of the nmethod.
1034 //
1035 // being_init: get_thread(<tmp reg>
1036 // cmpl [reg1 + <init_thread_offset>], <tmp reg>
1037 // jne patch_stub
1038 // movl [reg1 + <const>], reg (for field offsets) <or>
1039 // movl reg, [reg1 + <const>] (for field offsets)
1040 // jmp continue
1041 // <being_init offset> <bytes to copy> <bytes to skip>
1042 // patch_stub: jmp Runtime1::patch_code (through a runtime stub)
1043 // jmp patch_site
1044 //
1045 // If the class is being initialized the patch body is rewritten and
1046 // the patch site is rewritten to jump to being_init, instead of
1047 // patch_stub. Whenever this code is executed it checks the current
1048 // thread against the initializing thread so other threads will enter
1049 // the runtime and end up blocked waiting the class to finish
1050 // initializing inside the calls to resolve_field below. The
1051 // initializing class will continue on it's way. Once the class is
1052 // fully_initialized, the intializing_thread of the class becomes
1053 // null, so the next thread to execute this code will fail the test,
1054 // call into patch_code and complete the patching process by copying
1055 // the patch body back into the main part of the nmethod and resume
1056 // executing.
1057
1058 // NB:
1059 //
1060 // Patchable instruction sequences inherently exhibit race conditions,
1061 // where thread A is patching an instruction at the same time thread B
1062 // is executing it. The algorithms we use ensure that any observation
1063 // that B can make on any intermediate states during A's patching will
1064 // always end up with a correct outcome. This is easiest if there are
1065 // few or no intermediate states. (Some inline caches have two
1066 // related instructions that must be patched in tandem. For those,
1067 // intermediate states seem to be unavoidable, but we will get the
1068 // right answer from all possible observation orders.)
1069 //
1070 // When patching the entry instruction at the head of a method, or a
1071 // linkable call instruction inside of a method, we try very hard to
1072 // use a patch sequence which executes as a single memory transaction.
1073 // This means, in practice, that when thread A patches an instruction,
1074 // it should patch a 32-bit or 64-bit word that somehow overlaps the
1075 // instruction or is contained in it. We believe that memory hardware
1076 // will never break up such a word write, if it is naturally aligned
1077 // for the word being written. We also know that some CPUs work very
1078 // hard to create atomic updates even of naturally unaligned words,
1079 // but we don't want to bet the farm on this always working.
1080 //
1081 // Therefore, if there is any chance of a race condition, we try to
1082 // patch only naturally aligned words, as single, full-word writes.
1083
1084 JRT_ENTRY(void, Runtime1::patch_code(JavaThread* current, C1StubId stub_id ))
1085 #ifndef PRODUCT
1086 if (PrintC1Statistics) {
1087 _patch_code_slowcase_cnt++;
1088 }
1089 #endif
1090
1091 ResourceMark rm(current);
1092 RegisterMap reg_map(current,
1093 RegisterMap::UpdateMap::skip,
1094 RegisterMap::ProcessFrames::include,
1095 RegisterMap::WalkContinuation::skip);
1096 frame runtime_frame = current->last_frame();
1097 frame caller_frame = runtime_frame.sender(®_map);
1098
1099 // last java frame on stack
1100 vframeStream vfst(current, true);
1101 assert(!vfst.at_end(), "Java frame must exist");
1102
1103 methodHandle caller_method(current, vfst.method());
1104 // Note that caller_method->code() may not be same as caller_code because of OSR's
1105 // Note also that in the presence of inlining it is not guaranteed
1106 // that caller_method() == caller_code->method()
1107
1108 int bci = vfst.bci();
1109 Bytecodes::Code code = caller_method()->java_code_at(bci);
1110
1111 // this is used by assertions in the access_field_patching_id
1112 BasicType patch_field_type = T_ILLEGAL;
1113 bool deoptimize_for_volatile = false;
1114 bool deoptimize_for_atomic = false;
1115 bool deoptimize_for_null_free = false;
1116 bool deoptimize_for_flat = false;
1117 int patch_field_offset = -1;
1118 Klass* init_klass = nullptr; // klass needed by load_klass_patching code
1119 Klass* load_klass = nullptr; // klass needed by load_klass_patching code
1120 Handle mirror(current, nullptr); // oop needed by load_mirror_patching code
1121 Handle appendix(current, nullptr); // oop needed by appendix_patching code
1122 bool load_klass_or_mirror_patch_id =
1123 (stub_id == C1StubId::load_klass_patching_id || stub_id == C1StubId::load_mirror_patching_id);
1124
1125 if (stub_id == C1StubId::access_field_patching_id) {
1126
1127 Bytecode_field field_access(caller_method, bci);
1128 fieldDescriptor result; // initialize class if needed
1129 Bytecodes::Code code = field_access.code();
1130 constantPoolHandle constants(current, caller_method->constants());
1131 LinkResolver::resolve_field_access(result, constants, field_access.index(), caller_method, Bytecodes::java_code(code), CHECK);
1132 patch_field_offset = result.offset();
1133
1134 // If we're patching a field which is volatile then at compile it
1135 // must not have been know to be volatile, so the generated code
1136 // isn't correct for a volatile reference. The nmethod has to be
1137 // deoptimized so that the code can be regenerated correctly.
1138 // This check is only needed for access_field_patching since this
1139 // is the path for patching field offsets. load_klass is only
1140 // used for patching references to oops which don't need special
1141 // handling in the volatile case.
1142
1143 deoptimize_for_volatile = result.access_flags().is_volatile();
1144
1145 // If we are patching a field which should be atomic, then
1146 // the generated code is not correct either, force deoptimizing.
1147 // We need to only cover T_LONG and T_DOUBLE fields, as we can
1148 // break access atomicity only for them.
1149
1150 // Strictly speaking, the deoptimization on 64-bit platforms
1151 // is unnecessary, and T_LONG stores on 32-bit platforms need
1152 // to be handled by special patching code when AlwaysAtomicAccesses
1153 // becomes product feature. At this point, we are still going
1154 // for the deoptimization for consistency against volatile
1155 // accesses.
1156
1157 patch_field_type = result.field_type();
1158 deoptimize_for_atomic = (AlwaysAtomicAccesses && (patch_field_type == T_DOUBLE || patch_field_type == T_LONG));
1159
1160 // The field we are patching is null-free. Deoptimize and regenerate
1161 // the compiled code if we patch a putfield/putstatic because it
1162 // does not contain the required null check.
1163 deoptimize_for_null_free = result.is_null_free_inline_type() && (field_access.is_putfield() || field_access.is_putstatic());
1164
1165 // The field we are patching is flat. Deoptimize and regenerate
1166 // the compiled code which can't handle the layout of the flat
1167 // field because it was unknown at compile time.
1168 deoptimize_for_flat = result.is_flat();
1169
1170 } else if (load_klass_or_mirror_patch_id) {
1171 Klass* k = nullptr;
1172 switch (code) {
1173 case Bytecodes::_putstatic:
1174 case Bytecodes::_getstatic:
1175 { Klass* klass = resolve_field_return_klass(caller_method, bci, CHECK);
1176 init_klass = klass;
1177 mirror = Handle(current, klass->java_mirror());
1178 }
1179 break;
1180 case Bytecodes::_new:
1181 { Bytecode_new bnew(caller_method(), caller_method->bcp_from(bci));
1182 k = caller_method->constants()->klass_at(bnew.index(), CHECK);
1183 }
1184 break;
1185 case Bytecodes::_multianewarray:
1186 { Bytecode_multianewarray mna(caller_method(), caller_method->bcp_from(bci));
1187 k = caller_method->constants()->klass_at(mna.index(), CHECK);
1188 }
1189 break;
1190 case Bytecodes::_instanceof:
1191 { Bytecode_instanceof io(caller_method(), caller_method->bcp_from(bci));
1192 k = caller_method->constants()->klass_at(io.index(), CHECK);
1193 }
1194 break;
1195 case Bytecodes::_checkcast:
1196 { Bytecode_checkcast cc(caller_method(), caller_method->bcp_from(bci));
1197 k = caller_method->constants()->klass_at(cc.index(), CHECK);
1198 }
1199 break;
1200 case Bytecodes::_anewarray:
1201 { Bytecode_anewarray anew(caller_method(), caller_method->bcp_from(bci));
1202 Klass* ek = caller_method->constants()->klass_at(anew.index(), CHECK);
1203 k = ek->array_klass(CHECK);
1204 }
1205 break;
1206 case Bytecodes::_ldc:
1207 case Bytecodes::_ldc_w:
1208 case Bytecodes::_ldc2_w:
1209 {
1210 Bytecode_loadconstant cc(caller_method, bci);
1211 oop m = cc.resolve_constant(CHECK);
1212 mirror = Handle(current, m);
1213 }
1214 break;
1215 default: fatal("unexpected bytecode for load_klass_or_mirror_patch_id");
1216 }
1217 load_klass = k;
1218 } else if (stub_id == C1StubId::load_appendix_patching_id) {
1219 Bytecode_invoke bytecode(caller_method, bci);
1220 Bytecodes::Code bc = bytecode.invoke_code();
1221
1222 CallInfo info;
1223 constantPoolHandle pool(current, caller_method->constants());
1224 int index = bytecode.index();
1225 LinkResolver::resolve_invoke(info, Handle(), pool, index, bc, CHECK);
1226 switch (bc) {
1227 case Bytecodes::_invokehandle: {
1228 ResolvedMethodEntry* entry = pool->cache()->set_method_handle(index, info);
1229 appendix = Handle(current, pool->cache()->appendix_if_resolved(entry));
1230 break;
1231 }
1232 case Bytecodes::_invokedynamic: {
1233 appendix = Handle(current, pool->cache()->set_dynamic_call(info, index));
1234 break;
1235 }
1236 default: fatal("unexpected bytecode for load_appendix_patching_id");
1237 }
1238 } else {
1239 ShouldNotReachHere();
1240 }
1241
1242 if (deoptimize_for_volatile || deoptimize_for_atomic || deoptimize_for_null_free || deoptimize_for_flat) {
1243 // At compile time we assumed the field wasn't volatile/atomic but after
1244 // loading it turns out it was volatile/atomic so we have to throw the
1245 // compiled code out and let it be regenerated.
1246 if (TracePatching) {
1247 if (deoptimize_for_volatile) {
1248 tty->print_cr("Deoptimizing for patching volatile field reference");
1249 }
1250 if (deoptimize_for_atomic) {
1251 tty->print_cr("Deoptimizing for patching atomic field reference");
1252 }
1253 if (deoptimize_for_null_free) {
1254 tty->print_cr("Deoptimizing for patching null-free field reference");
1255 }
1256 if (deoptimize_for_flat) {
1257 tty->print_cr("Deoptimizing for patching flat field reference");
1258 }
1259 }
1260
1261 // It's possible the nmethod was invalidated in the last
1262 // safepoint, but if it's still alive then make it not_entrant.
1263 nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
1264 if (nm != nullptr) {
1265 nm->make_not_entrant();
1266 }
1267
1268 Deoptimization::deoptimize_frame(current, caller_frame.id());
1269
1270 // Return to the now deoptimized frame.
1271 }
1272
1273 // Now copy code back
1274
1275 {
1276 MutexLocker ml_code (current, CodeCache_lock, Mutex::_no_safepoint_check_flag);
1277 //
1278 // Deoptimization may have happened while we waited for the lock.
1279 // In that case we don't bother to do any patching we just return
1280 // and let the deopt happen
1281 if (!caller_is_deopted(current)) {
1282 NativeGeneralJump* jump = nativeGeneralJump_at(caller_frame.pc());
1283 address instr_pc = jump->jump_destination();
1284 NativeInstruction* ni = nativeInstruction_at(instr_pc);
1285 if (ni->is_jump() ) {
1286 // the jump has not been patched yet
1287 // The jump destination is slow case and therefore not part of the stubs
1288 // (stubs are only for StaticCalls)
1289
1290 // format of buffer
1291 // ....
1292 // instr byte 0 <-- copy_buff
1293 // instr byte 1
1294 // ..
1295 // instr byte n-1
1296 // n
1297 // .... <-- call destination
1298
1299 address stub_location = caller_frame.pc() + PatchingStub::patch_info_offset();
1300 unsigned char* byte_count = (unsigned char*) (stub_location - 1);
1301 unsigned char* byte_skip = (unsigned char*) (stub_location - 2);
1302 unsigned char* being_initialized_entry_offset = (unsigned char*) (stub_location - 3);
1303 address copy_buff = stub_location - *byte_skip - *byte_count;
1304 address being_initialized_entry = stub_location - *being_initialized_entry_offset;
1305 if (TracePatching) {
1306 ttyLocker ttyl;
1307 tty->print_cr(" Patching %s at bci %d at address " INTPTR_FORMAT " (%s)", Bytecodes::name(code), bci,
1308 p2i(instr_pc), (stub_id == C1StubId::access_field_patching_id) ? "field" : "klass");
1309 nmethod* caller_code = CodeCache::find_nmethod(caller_frame.pc());
1310 assert(caller_code != nullptr, "nmethod not found");
1311
1312 // NOTE we use pc() not original_pc() because we already know they are
1313 // identical otherwise we'd have never entered this block of code
1314
1315 const ImmutableOopMap* map = caller_code->oop_map_for_return_address(caller_frame.pc());
1316 assert(map != nullptr, "null check");
1317 map->print();
1318 tty->cr();
1319
1320 Disassembler::decode(copy_buff, copy_buff + *byte_count, tty);
1321 }
1322 // depending on the code below, do_patch says whether to copy the patch body back into the nmethod
1323 bool do_patch = true;
1324 if (stub_id == C1StubId::access_field_patching_id) {
1325 // The offset may not be correct if the class was not loaded at code generation time.
1326 // Set it now.
1327 NativeMovRegMem* n_move = nativeMovRegMem_at(copy_buff);
1328 assert(n_move->offset() == 0 || (n_move->offset() == 4 && (patch_field_type == T_DOUBLE || patch_field_type == T_LONG)), "illegal offset for type");
1329 assert(patch_field_offset >= 0, "illegal offset");
1330 n_move->add_offset_in_bytes(patch_field_offset);
1331 } else if (load_klass_or_mirror_patch_id) {
1332 // If a getstatic or putstatic is referencing a klass which
1333 // isn't fully initialized, the patch body isn't copied into
1334 // place until initialization is complete. In this case the
1335 // patch site is setup so that any threads besides the
1336 // initializing thread are forced to come into the VM and
1337 // block.
1338 do_patch = (code != Bytecodes::_getstatic && code != Bytecodes::_putstatic) ||
1339 InstanceKlass::cast(init_klass)->is_initialized();
1340 NativeGeneralJump* jump = nativeGeneralJump_at(instr_pc);
1341 if (jump->jump_destination() == being_initialized_entry) {
1342 assert(do_patch == true, "initialization must be complete at this point");
1343 } else {
1344 // patch the instruction <move reg, klass>
1345 NativeMovConstReg* n_copy = nativeMovConstReg_at(copy_buff);
1346
1347 assert(n_copy->data() == 0 ||
1348 n_copy->data() == (intptr_t)Universe::non_oop_word(),
1349 "illegal init value");
1350 if (stub_id == C1StubId::load_klass_patching_id) {
1351 assert(load_klass != nullptr, "klass not set");
1352 n_copy->set_data((intx) (load_klass));
1353 } else {
1354 // Don't need a G1 pre-barrier here since we assert above that data isn't an oop.
1355 n_copy->set_data(cast_from_oop<intx>(mirror()));
1356 }
1357
1358 if (TracePatching) {
1359 Disassembler::decode(copy_buff, copy_buff + *byte_count, tty);
1360 }
1361 }
1362 } else if (stub_id == C1StubId::load_appendix_patching_id) {
1363 NativeMovConstReg* n_copy = nativeMovConstReg_at(copy_buff);
1364 assert(n_copy->data() == 0 ||
1365 n_copy->data() == (intptr_t)Universe::non_oop_word(),
1366 "illegal init value");
1367 n_copy->set_data(cast_from_oop<intx>(appendix()));
1368
1369 if (TracePatching) {
1370 Disassembler::decode(copy_buff, copy_buff + *byte_count, tty);
1371 }
1372 } else {
1373 ShouldNotReachHere();
1374 }
1375
1376 if (do_patch) {
1377 // replace instructions
1378 // first replace the tail, then the call
1379 #ifdef ARM
1380 if((load_klass_or_mirror_patch_id ||
1381 stub_id == C1StubId::load_appendix_patching_id) &&
1382 nativeMovConstReg_at(copy_buff)->is_pc_relative()) {
1383 nmethod* nm = CodeCache::find_nmethod(instr_pc);
1384 address addr = nullptr;
1385 assert(nm != nullptr, "invalid nmethod_pc");
1386 RelocIterator mds(nm, copy_buff, copy_buff + 1);
1387 while (mds.next()) {
1388 if (mds.type() == relocInfo::oop_type) {
1389 assert(stub_id == C1StubId::load_mirror_patching_id ||
1390 stub_id == C1StubId::load_appendix_patching_id, "wrong stub id");
1391 oop_Relocation* r = mds.oop_reloc();
1392 addr = (address)r->oop_addr();
1393 break;
1394 } else if (mds.type() == relocInfo::metadata_type) {
1395 assert(stub_id == C1StubId::load_klass_patching_id, "wrong stub id");
1396 metadata_Relocation* r = mds.metadata_reloc();
1397 addr = (address)r->metadata_addr();
1398 break;
1399 }
1400 }
1401 assert(addr != nullptr, "metadata relocation must exist");
1402 copy_buff -= *byte_count;
1403 NativeMovConstReg* n_copy2 = nativeMovConstReg_at(copy_buff);
1404 n_copy2->set_pc_relative_offset(addr, instr_pc);
1405 }
1406 #endif
1407
1408 for (int i = NativeGeneralJump::instruction_size; i < *byte_count; i++) {
1409 address ptr = copy_buff + i;
1410 int a_byte = (*ptr) & 0xFF;
1411 address dst = instr_pc + i;
1412 *(unsigned char*)dst = (unsigned char) a_byte;
1413 }
1414 ICache::invalidate_range(instr_pc, *byte_count);
1415 NativeGeneralJump::replace_mt_safe(instr_pc, copy_buff);
1416
1417 if (load_klass_or_mirror_patch_id ||
1418 stub_id == C1StubId::load_appendix_patching_id) {
1419 relocInfo::relocType rtype =
1420 (stub_id == C1StubId::load_klass_patching_id) ?
1421 relocInfo::metadata_type :
1422 relocInfo::oop_type;
1423 // update relocInfo to metadata
1424 nmethod* nm = CodeCache::find_nmethod(instr_pc);
1425 assert(nm != nullptr, "invalid nmethod_pc");
1426
1427 // The old patch site is now a move instruction so update
1428 // the reloc info so that it will get updated during
1429 // future GCs.
1430 RelocIterator iter(nm, (address)instr_pc, (address)(instr_pc + 1));
1431 relocInfo::change_reloc_info_for_address(&iter, (address) instr_pc,
1432 relocInfo::none, rtype);
1433 }
1434
1435 } else {
1436 ICache::invalidate_range(copy_buff, *byte_count);
1437 NativeGeneralJump::insert_unconditional(instr_pc, being_initialized_entry);
1438 }
1439 }
1440 }
1441 // If we are patching in a non-perm oop, make sure the nmethod
1442 // is on the right list.
1443 nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
1444 guarantee(nm != nullptr, "only nmethods can contain non-perm oops");
1445
1446 // Since we've patched some oops in the nmethod,
1447 // (re)register it with the heap.
1448 Universe::heap()->register_nmethod(nm);
1449 }
1450 JRT_END
1451
1452 #else // DEOPTIMIZE_WHEN_PATCHING
1453
1454 static bool is_patching_needed(JavaThread* current, C1StubId stub_id) {
1455 if (stub_id == C1StubId::load_klass_patching_id ||
1456 stub_id == C1StubId::load_mirror_patching_id) {
1457 // last java frame on stack
1458 vframeStream vfst(current, true);
1459 assert(!vfst.at_end(), "Java frame must exist");
1460
1461 methodHandle caller_method(current, vfst.method());
1462 int bci = vfst.bci();
1463 Bytecodes::Code code = caller_method()->java_code_at(bci);
1464
1465 switch (code) {
1466 case Bytecodes::_new:
1467 case Bytecodes::_anewarray:
1468 case Bytecodes::_multianewarray:
1469 case Bytecodes::_instanceof:
1470 case Bytecodes::_checkcast: {
1471 Bytecode bc(caller_method(), caller_method->bcp_from(bci));
1472 constantTag tag = caller_method->constants()->tag_at(bc.get_index_u2(code));
1473 if (tag.is_unresolved_klass_in_error()) {
1474 return false; // throws resolution error
1475 }
1476 break;
1477 }
1478
1479 default: break;
1480 }
1481 }
1482 return true;
1483 }
1484
1485 void Runtime1::patch_code(JavaThread* current, C1StubId stub_id) {
1486 #ifndef PRODUCT
1487 if (PrintC1Statistics) {
1488 _patch_code_slowcase_cnt++;
1489 }
1490 #endif
1491
1492 // Enable WXWrite: the function is called by c1 stub as a runtime function
1493 // (see another implementation above).
1494 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1495
1496 if (TracePatching) {
1497 tty->print_cr("Deoptimizing because patch is needed");
1498 }
1499
1500 RegisterMap reg_map(current,
1501 RegisterMap::UpdateMap::skip,
1502 RegisterMap::ProcessFrames::include,
1503 RegisterMap::WalkContinuation::skip);
1504
1505 frame runtime_frame = current->last_frame();
1506 frame caller_frame = runtime_frame.sender(®_map);
1507 assert(caller_frame.is_compiled_frame(), "Wrong frame type");
1508
1509 if (is_patching_needed(current, stub_id)) {
1510 // Make sure the nmethod is invalidated, i.e. made not entrant.
1511 nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
1512 if (nm != nullptr) {
1513 nm->make_not_entrant();
1514 }
1515 }
1516
1517 Deoptimization::deoptimize_frame(current, caller_frame.id());
1518 // Return to the now deoptimized frame.
1519 postcond(caller_is_deopted(current));
1520 }
1521
1522 #endif // DEOPTIMIZE_WHEN_PATCHING
1523
1524 // Entry point for compiled code. We want to patch a nmethod.
1525 // We don't do a normal VM transition here because we want to
1526 // know after the patching is complete and any safepoint(s) are taken
1527 // if the calling nmethod was deoptimized. We do this by calling a
1528 // helper method which does the normal VM transition and when it
1529 // completes we can check for deoptimization. This simplifies the
1530 // assembly code in the cpu directories.
1531 //
1532 int Runtime1::move_klass_patching(JavaThread* current) {
1533 //
1534 // NOTE: we are still in Java
1535 //
1536 debug_only(NoHandleMark nhm;)
1537 {
1538 // Enter VM mode
1539 ResetNoHandleMark rnhm;
1540 patch_code(current, C1StubId::load_klass_patching_id);
1541 }
1542 // Back in JAVA, use no oops DON'T safepoint
1543
1544 // Return true if calling code is deoptimized
1545
1546 return caller_is_deopted(current);
1547 }
1548
1549 int Runtime1::move_mirror_patching(JavaThread* current) {
1550 //
1551 // NOTE: we are still in Java
1552 //
1553 debug_only(NoHandleMark nhm;)
1554 {
1555 // Enter VM mode
1556 ResetNoHandleMark rnhm;
1557 patch_code(current, C1StubId::load_mirror_patching_id);
1558 }
1559 // Back in JAVA, use no oops DON'T safepoint
1560
1561 // Return true if calling code is deoptimized
1562
1563 return caller_is_deopted(current);
1564 }
1565
1566 int Runtime1::move_appendix_patching(JavaThread* current) {
1567 //
1568 // NOTE: we are still in Java
1569 //
1570 debug_only(NoHandleMark nhm;)
1571 {
1572 // Enter VM mode
1573 ResetNoHandleMark rnhm;
1574 patch_code(current, C1StubId::load_appendix_patching_id);
1575 }
1576 // Back in JAVA, use no oops DON'T safepoint
1577
1578 // Return true if calling code is deoptimized
1579
1580 return caller_is_deopted(current);
1581 }
1582
1583 // Entry point for compiled code. We want to patch a nmethod.
1584 // We don't do a normal VM transition here because we want to
1585 // know after the patching is complete and any safepoint(s) are taken
1586 // if the calling nmethod was deoptimized. We do this by calling a
1587 // helper method which does the normal VM transition and when it
1588 // completes we can check for deoptimization. This simplifies the
1589 // assembly code in the cpu directories.
1590 //
1591 int Runtime1::access_field_patching(JavaThread* current) {
1592 //
1593 // NOTE: we are still in Java
1594 //
1595 // Handles created in this function will be deleted by the
1596 // HandleMarkCleaner in the transition to the VM.
1597 NoHandleMark nhm;
1598 {
1599 // Enter VM mode
1600 ResetNoHandleMark rnhm;
1601 patch_code(current, C1StubId::access_field_patching_id);
1602 }
1603 // Back in JAVA, use no oops DON'T safepoint
1604
1605 // Return true if calling code is deoptimized
1606
1607 return caller_is_deopted(current);
1608 }
1609
1610
1611 JRT_LEAF(void, Runtime1::trace_block_entry(jint block_id))
1612 // for now we just print out the block id
1613 tty->print("%d ", block_id);
1614 JRT_END
1615
1616
1617 JRT_LEAF(int, Runtime1::is_instance_of(oopDesc* mirror, oopDesc* obj))
1618 // had to return int instead of bool, otherwise there may be a mismatch
1619 // between the C calling convention and the Java one.
1620 // e.g., on x86, GCC may clear only %al when returning a bool false, but
1621 // JVM takes the whole %eax as the return value, which may misinterpret
1622 // the return value as a boolean true.
1623
1624 assert(mirror != nullptr, "should null-check on mirror before calling");
1625 Klass* k = java_lang_Class::as_Klass(mirror);
1626 return (k != nullptr && obj != nullptr && obj->is_a(k)) ? 1 : 0;
1627 JRT_END
1628
1629 JRT_ENTRY(void, Runtime1::predicate_failed_trap(JavaThread* current))
1630 ResourceMark rm;
1631
1632 RegisterMap reg_map(current,
1633 RegisterMap::UpdateMap::skip,
1634 RegisterMap::ProcessFrames::include,
1635 RegisterMap::WalkContinuation::skip);
1636 frame runtime_frame = current->last_frame();
1637 frame caller_frame = runtime_frame.sender(®_map);
1638
1639 nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
1640 assert (nm != nullptr, "no more nmethod?");
1641 nm->make_not_entrant();
1642
1643 methodHandle m(current, nm->method());
1644 MethodData* mdo = m->method_data();
1645
1646 if (mdo == nullptr && !HAS_PENDING_EXCEPTION) {
1647 // Build an MDO. Ignore errors like OutOfMemory;
1648 // that simply means we won't have an MDO to update.
1649 Method::build_profiling_method_data(m, THREAD);
1650 if (HAS_PENDING_EXCEPTION) {
1651 // Only metaspace OOM is expected. No Java code executed.
1652 assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())), "we expect only an OOM error here");
1653 CLEAR_PENDING_EXCEPTION;
1654 }
1655 mdo = m->method_data();
1656 }
1657
1658 if (mdo != nullptr) {
1659 mdo->inc_trap_count(Deoptimization::Reason_none);
1660 }
1661
1662 if (TracePredicateFailedTraps) {
1663 stringStream ss1, ss2;
1664 vframeStream vfst(current);
1665 Method* inlinee = vfst.method();
1666 inlinee->print_short_name(&ss1);
1667 m->print_short_name(&ss2);
1668 tty->print_cr("Predicate failed trap in method %s at bci %d inlined in %s at pc " INTPTR_FORMAT, ss1.freeze(), vfst.bci(), ss2.freeze(), p2i(caller_frame.pc()));
1669 }
1670
1671
1672 Deoptimization::deoptimize_frame(current, caller_frame.id());
1673
1674 JRT_END
1675
1676 // Check exception if AbortVMOnException flag set
1677 JRT_LEAF(void, Runtime1::check_abort_on_vm_exception(oopDesc* ex))
1678 ResourceMark rm;
1679 const char* message = nullptr;
1680 if (ex->is_a(vmClasses::Throwable_klass())) {
1681 oop msg = java_lang_Throwable::message(ex);
1682 if (msg != nullptr) {
1683 message = java_lang_String::as_utf8_string(msg);
1684 }
1685 }
1686 Exceptions::debug_check_abort(ex->klass()->external_name(), message);
1687 JRT_END
1688
1689 #ifndef PRODUCT
1690 void Runtime1::print_statistics() {
1691 tty->print_cr("C1 Runtime statistics:");
1692 tty->print_cr(" _resolve_invoke_virtual_cnt: %u", SharedRuntime::_resolve_virtual_ctr);
1693 tty->print_cr(" _resolve_invoke_opt_virtual_cnt: %u", SharedRuntime::_resolve_opt_virtual_ctr);
1694 tty->print_cr(" _resolve_invoke_static_cnt: %u", SharedRuntime::_resolve_static_ctr);
1695 tty->print_cr(" _handle_wrong_method_cnt: %u", SharedRuntime::_wrong_method_ctr);
1696 tty->print_cr(" _ic_miss_cnt: %u", SharedRuntime::_ic_miss_ctr);
1697 tty->print_cr(" _generic_arraycopystub_cnt: %u", _generic_arraycopystub_cnt);
1698 tty->print_cr(" _byte_arraycopy_cnt: %u", _byte_arraycopy_stub_cnt);
1699 tty->print_cr(" _short_arraycopy_cnt: %u", _short_arraycopy_stub_cnt);
1700 tty->print_cr(" _int_arraycopy_cnt: %u", _int_arraycopy_stub_cnt);
1701 tty->print_cr(" _long_arraycopy_cnt: %u", _long_arraycopy_stub_cnt);
1702 tty->print_cr(" _oop_arraycopy_cnt: %u", _oop_arraycopy_stub_cnt);
1703 tty->print_cr(" _arraycopy_slowcase_cnt: %u", _arraycopy_slowcase_cnt);
1704 tty->print_cr(" _arraycopy_checkcast_cnt: %u", _arraycopy_checkcast_cnt);
1705 tty->print_cr(" _arraycopy_checkcast_attempt_cnt:%u", _arraycopy_checkcast_attempt_cnt);
1706
1707 tty->print_cr(" _new_type_array_slowcase_cnt: %u", _new_type_array_slowcase_cnt);
1708 tty->print_cr(" _new_object_array_slowcase_cnt: %u", _new_object_array_slowcase_cnt);
1709 tty->print_cr(" _new_null_free_array_slowcase_cnt: %u", _new_null_free_array_slowcase_cnt);
1710 tty->print_cr(" _new_instance_slowcase_cnt: %u", _new_instance_slowcase_cnt);
1711 tty->print_cr(" _new_multi_array_slowcase_cnt: %u", _new_multi_array_slowcase_cnt);
1712 tty->print_cr(" _load_flat_array_slowcase_cnt: %u", _load_flat_array_slowcase_cnt);
1713 tty->print_cr(" _store_flat_array_slowcase_cnt: %u", _store_flat_array_slowcase_cnt);
1714 tty->print_cr(" _substitutability_check_slowcase_cnt: %u", _substitutability_check_slowcase_cnt);
1715 tty->print_cr(" _buffer_inline_args_slowcase_cnt:%u", _buffer_inline_args_slowcase_cnt);
1716 tty->print_cr(" _buffer_inline_args_no_receiver_slowcase_cnt:%u", _buffer_inline_args_no_receiver_slowcase_cnt);
1717
1718 tty->print_cr(" _monitorenter_slowcase_cnt: %u", _monitorenter_slowcase_cnt);
1719 tty->print_cr(" _monitorexit_slowcase_cnt: %u", _monitorexit_slowcase_cnt);
1720 tty->print_cr(" _patch_code_slowcase_cnt: %u", _patch_code_slowcase_cnt);
1721
1722 tty->print_cr(" _throw_range_check_exception_count: %u:", _throw_range_check_exception_count);
1723 tty->print_cr(" _throw_index_exception_count: %u:", _throw_index_exception_count);
1724 tty->print_cr(" _throw_div0_exception_count: %u:", _throw_div0_exception_count);
1725 tty->print_cr(" _throw_null_pointer_exception_count: %u:", _throw_null_pointer_exception_count);
1726 tty->print_cr(" _throw_class_cast_exception_count: %u:", _throw_class_cast_exception_count);
1727 tty->print_cr(" _throw_incompatible_class_change_error_count: %u:", _throw_incompatible_class_change_error_count);
1728 tty->print_cr(" _throw_illegal_monitor_state_exception_count: %u:", _throw_illegal_monitor_state_exception_count);
1729 tty->print_cr(" _throw_identity_exception_count: %u:", _throw_identity_exception_count);
1730 tty->print_cr(" _throw_count: %u:", _throw_count);
1731
1732 SharedRuntime::print_ic_miss_histogram();
1733 tty->cr();
1734 }
1735 #endif // PRODUCT