43 #include "interpreter/oopMapCache.hpp"
44 #include "logging/log.hpp"
45 #include "logging/logStream.hpp"
46 #include "logging/logTag.hpp"
47 #include "memory/allocation.inline.hpp"
48 #include "memory/metadataFactory.hpp"
49 #include "memory/metaspaceClosure.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "nmt/memTracker.hpp"
54 #include "oops/constMethod.hpp"
55 #include "oops/constantPool.hpp"
56 #include "oops/klass.inline.hpp"
57 #include "oops/method.inline.hpp"
58 #include "oops/methodData.hpp"
59 #include "oops/objArrayKlass.hpp"
60 #include "oops/objArrayOop.inline.hpp"
61 #include "oops/oop.inline.hpp"
62 #include "oops/symbol.hpp"
63 #include "prims/jvmtiExport.hpp"
64 #include "prims/methodHandles.hpp"
65 #include "runtime/atomic.hpp"
66 #include "runtime/arguments.hpp"
67 #include "runtime/continuationEntry.hpp"
68 #include "runtime/frame.inline.hpp"
69 #include "runtime/handles.inline.hpp"
70 #include "runtime/init.hpp"
71 #include "runtime/java.hpp"
72 #include "runtime/orderAccess.hpp"
73 #include "runtime/perfData.hpp"
74 #include "runtime/relocator.hpp"
75 #include "runtime/safepointVerifiers.hpp"
76 #include "runtime/sharedRuntime.hpp"
77 #include "runtime/signature.hpp"
78 #include "runtime/threads.hpp"
79 #include "runtime/vm_version.hpp"
80 #include "utilities/align.hpp"
81 #include "utilities/quickSort.hpp"
82 #include "utilities/vmError.hpp"
164 }
165
166 address Method::get_c2i_no_clinit_check_entry() {
167 assert(VM_Version::supports_fast_class_init_checks(), "");
168 assert(adapter() != nullptr, "must have");
169 return adapter()->get_c2i_no_clinit_check_entry();
170 }
171
172 char* Method::name_and_sig_as_C_string() const {
173 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature());
174 }
175
176 char* Method::name_and_sig_as_C_string(char* buf, int size) const {
177 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size);
178 }
179
180 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) {
181 const char* klass_name = klass->external_name();
182 int klass_name_len = (int)strlen(klass_name);
183 int method_name_len = method_name->utf8_length();
184 int len = klass_name_len + 1 + method_name_len + signature->utf8_length();
185 char* dest = NEW_RESOURCE_ARRAY(char, len + 1);
186 strcpy(dest, klass_name);
187 dest[klass_name_len] = '.';
188 strcpy(&dest[klass_name_len + 1], method_name->as_C_string());
189 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string());
190 dest[len] = 0;
191 return dest;
192 }
193
194 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) {
195 Symbol* klass_name = klass->name();
196 klass_name->as_klass_external_name(buf, size);
197 int len = (int)strlen(buf);
198
199 if (len < size - 1) {
200 buf[len++] = '.';
201
202 method_name->as_C_string(&(buf[len]), size - len);
203 len = (int)strlen(buf);
204
205 signature->as_C_string(&(buf[len]), size - len);
206 }
207
208 return buf;
209 }
368 address Method::bcp_from(address bcp) const {
369 if (is_native() && bcp == nullptr) {
370 return code_base();
371 } else {
372 return bcp;
373 }
374 }
375
376 int Method::size(bool is_native) {
377 // If native, then include pointers for native_function and signature_handler
378 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0;
379 int extra_words = align_up(extra_bytes, BytesPerWord) / BytesPerWord;
380 return align_metadata_size(header_size() + extra_words);
381 }
382
383 Symbol* Method::klass_name() const {
384 return method_holder()->name();
385 }
386
387 void Method::metaspace_pointers_do(MetaspaceClosure* it) {
388 log_trace(cds)("Iter(Method): %p", this);
389
390 if (!method_holder()->is_rewritten()) {
391 it->push(&_constMethod, MetaspaceClosure::_writable);
392 } else {
393 it->push(&_constMethod);
394 }
395 it->push(&_method_data);
396 it->push(&_method_counters);
397 NOT_PRODUCT(it->push(&_name);)
398 }
399
400 #if INCLUDE_CDS
401 // Attempt to return method to original state. Clear any pointers
402 // (to objects outside the shared spaces). We won't be able to predict
403 // where they should point in a new JVM. Further initialize some
404 // entries now in order allow them to be write protected later.
405
406 void Method::remove_unshareable_info() {
407 unlink_method();
408 JFR_ONLY(REMOVE_METHOD_ID(this);)
409 }
410
411 void Method::restore_unshareable_info(TRAPS) {
412 assert(is_method() && is_valid_method(this), "ensure C++ vtable is restored");
413 assert(!queued_for_compilation(), "method's queued_for_compilation flag should not be set");
414 }
415 #endif
416
417 void Method::set_vtable_index(int index) {
418 if (is_shared() && !MetaspaceShared::remapped_readwrite() && method_holder()->verified_at_dump_time()) {
419 // At runtime initialize_vtable is rerun as part of link_class_impl()
420 // for a shared class loaded by the non-boot loader to obtain the loader
421 // constraints based on the runtime classloaders' context.
422 return; // don't write into the shared class
423 } else {
424 _vtable_index = index;
425 }
426 }
427
428 void Method::set_itable_index(int index) {
429 if (is_shared() && !MetaspaceShared::remapped_readwrite() && method_holder()->verified_at_dump_time()) {
430 // At runtime initialize_itable is rerun as part of link_class_impl()
431 // for a shared class loaded by the non-boot loader to obtain the loader
432 // constraints based on the runtime classloaders' context. The dumptime
433 // itable index should be the same as the runtime index.
560 // Counting based on signed int counters tends to overflow with
561 // longer-running workloads on fast machines. The counters under
562 // consideration here, however, are limited in range by counting
563 // logic. See InvocationCounter:count_limit for example.
564 // No "overflow precautions" need to be implemented here.
565 st->print_cr (" interpreter_invocation_count: " INT32_FORMAT_W(11), interpreter_invocation_count());
566 st->print_cr (" invocation_counter: " INT32_FORMAT_W(11), invocation_count());
567 st->print_cr (" backedge_counter: " INT32_FORMAT_W(11), backedge_count());
568
569 if (method_data() != nullptr) {
570 st->print_cr (" decompile_count: " UINT32_FORMAT_W(11), method_data()->decompile_count());
571 }
572
573 #ifndef PRODUCT
574 if (CountCompiledCalls) {
575 st->print_cr (" compiled_invocation_count: " INT64_FORMAT_W(11), compiled_invocation_count());
576 }
577 #endif
578 }
579
580 // Build a MethodData* object to hold profiling information collected on this
581 // method when requested.
582 void Method::build_profiling_method_data(const methodHandle& method, TRAPS) {
583 // Do not profile the method if metaspace has hit an OOM previously
584 // allocating profiling data. Callers clear pending exception so don't
585 // add one here.
586 if (ClassLoaderDataGraph::has_metaspace_oom()) {
587 return;
588 }
589
590 ClassLoaderData* loader_data = method->method_holder()->class_loader_data();
591 MethodData* method_data = MethodData::allocate(loader_data, method, THREAD);
592 if (HAS_PENDING_EXCEPTION) {
593 CompileBroker::log_metaspace_failure();
594 ClassLoaderDataGraph::set_metaspace_oom(true);
595 return; // return the exception (which is cleared)
596 }
597
598 if (!Atomic::replace_if_null(&method->_method_data, method_data)) {
599 MetadataFactory::free_metadata(loader_data, method_data);
600 return;
601 }
602
603 if (PrintMethodData && (Verbose || WizardMode)) {
604 ResourceMark rm(THREAD);
605 tty->print("build_profiling_method_data for ");
606 method->print_name(tty);
607 tty->cr();
608 // At the end of the run, the MDO, full of data, will be dumped.
609 }
610 }
611
612 MethodCounters* Method::build_method_counters(Thread* current, Method* m) {
613 // Do not profile the method if metaspace has hit an OOM previously
614 if (ClassLoaderDataGraph::has_metaspace_oom()) {
615 return nullptr;
616 }
617
618 methodHandle mh(current, m);
619 MethodCounters* counters;
620 if (current->is_Java_thread()) {
621 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
622 // Use the TRAPS version for a JavaThread so it will adjust the GC threshold
623 // if needed.
624 counters = MethodCounters::allocate_with_exception(mh, THREAD);
625 if (HAS_PENDING_EXCEPTION) {
626 CLEAR_PENDING_EXCEPTION;
627 }
628 } else {
629 // Call metaspace allocation that doesn't throw exception if the
630 // current thread isn't a JavaThread, ie. the VMThread.
631 counters = MethodCounters::allocate_no_exception(mh);
632 }
633
634 if (counters == nullptr) {
635 CompileBroker::log_metaspace_failure();
636 ClassLoaderDataGraph::set_metaspace_oom(true);
637 return nullptr;
638 }
639
640 if (!mh->init_method_counters(counters)) {
641 MetadataFactory::free_metadata(mh->method_holder()->class_loader_data(), counters);
642 }
643
644 return mh->method_counters();
645 }
646
647 bool Method::init_method_counters(MethodCounters* counters) {
648 // Try to install a pointer to MethodCounters, return true on success.
649 return Atomic::replace_if_null(&_method_counters, counters);
650 }
651
652 void Method::set_exception_handler_entered(int handler_bci) {
653 if (ProfileExceptionHandlers) {
654 MethodData* mdo = method_data();
655 if (mdo != nullptr) {
656 BitData handler_data = mdo->exception_handler_bci_to_data(handler_bci);
657 handler_data.set_exception_handler_entered();
658 }
659 }
660 }
661
662 int Method::extra_stack_words() {
663 // not an inline function, to avoid a header dependency on Interpreter
850 return (is_static() ||
851 method_holder()->major_version() < 51);
852 }
853
854 bool Method::is_static_initializer() const {
855 // For classfiles version 51 or greater, ensure that the clinit method is
856 // static. Non-static methods with the name "<clinit>" are not static
857 // initializers. (older classfiles exempted for backward compatibility)
858 return name() == vmSymbols::class_initializer_name() &&
859 has_valid_initializer_flags();
860 }
861
862 bool Method::is_object_initializer() const {
863 return name() == vmSymbols::object_initializer_name();
864 }
865
866 bool Method::needs_clinit_barrier() const {
867 return is_static() && !method_holder()->is_initialized();
868 }
869
870 bool Method::is_object_wait0() const {
871 return klass_name() == vmSymbols::java_lang_Object()
872 && name() == vmSymbols::wait_name();
873 }
874
875 objArrayHandle Method::resolved_checked_exceptions_impl(Method* method, TRAPS) {
876 int length = method->checked_exceptions_length();
877 if (length == 0) { // common case
878 return objArrayHandle(THREAD, Universe::the_empty_class_array());
879 } else {
880 methodHandle h_this(THREAD, method);
881 objArrayOop m_oop = oopFactory::new_objArray(vmClasses::Class_klass(), length, CHECK_(objArrayHandle()));
882 objArrayHandle mirrors (THREAD, m_oop);
883 for (int i = 0; i < length; i++) {
884 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe
885 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle()));
886 if (log_is_enabled(Warning, exceptions) &&
887 !k->is_subclass_of(vmClasses::Throwable_klass())) {
888 ResourceMark rm(THREAD);
889 log_warning(exceptions)(
1134 }
1135
1136 #if INCLUDE_CDS
1137 // Called by class data sharing to remove any entry points (which are not shared)
1138 void Method::unlink_method() {
1139 assert(CDSConfig::is_dumping_archive(), "sanity");
1140 _code = nullptr;
1141 _adapter = nullptr;
1142 _i2i_entry = nullptr;
1143 _from_compiled_entry = nullptr;
1144 _from_interpreted_entry = nullptr;
1145
1146 if (is_native()) {
1147 *native_function_addr() = nullptr;
1148 set_signature_handler(nullptr);
1149 }
1150 NOT_PRODUCT(set_compiled_invocation_count(0);)
1151
1152 clear_method_data();
1153 clear_method_counters();
1154 remove_unshareable_flags();
1155 }
1156
1157 void Method::remove_unshareable_flags() {
1158 // clear all the flags that shouldn't be in the archived version
1159 assert(!is_old(), "must be");
1160 assert(!is_obsolete(), "must be");
1161 assert(!is_deleted(), "must be");
1162
1163 set_is_prefixed_native(false);
1164 set_queued_for_compilation(false);
1165 set_is_not_c2_compilable(false);
1166 set_is_not_c1_compilable(false);
1167 set_is_not_c2_osr_compilable(false);
1168 set_on_stack_flag(false);
1169 }
1170 #endif
1171
1172 // Called when the method_holder is getting linked. Setup entrypoints so the method
1173 // is ready to be called from interpreter, compiler, and vtables.
1174 void Method::link_method(const methodHandle& h_method, TRAPS) {
1175 if (log_is_enabled(Info, perf, class, link)) {
1176 ClassLoader::perf_ik_link_methods_count()->inc();
1177 }
1178
1179 // If the code cache is full, we may reenter this function for the
1180 // leftover methods that weren't linked.
1181 if (adapter() != nullptr) {
1182 return;
1183 }
1184 assert( _code == nullptr, "nothing compiled yet" );
1185
1186 // Setup interpreter entrypoint
1187 assert(this == h_method(), "wrong h_method()" );
1188
1207 // called from the vtable. We need adapters on such methods that get loaded
1208 // later. Ditto for mega-morphic itable calls. If this proves to be a
1209 // problem we'll make these lazily later.
1210 (void) make_adapters(h_method, CHECK);
1211
1212 // ONLY USE the h_method now as make_adapter may have blocked
1213
1214 if (h_method->is_continuation_native_intrinsic()) {
1215 _from_interpreted_entry = nullptr;
1216 _from_compiled_entry = nullptr;
1217 _i2i_entry = nullptr;
1218 if (Continuations::enabled()) {
1219 assert(!Threads::is_vm_complete(), "should only be called during vm init");
1220 AdapterHandlerLibrary::create_native_wrapper(h_method);
1221 if (!h_method->has_compiled_code()) {
1222 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Initial size of CodeCache is too small");
1223 }
1224 assert(_from_interpreted_entry == get_i2c_entry(), "invariant");
1225 }
1226 }
1227 }
1228
1229 address Method::make_adapters(const methodHandle& mh, TRAPS) {
1230 PerfTraceTime timer(ClassLoader::perf_method_adapters_time());
1231
1232 // Adapters for compiled code are made eagerly here. They are fairly
1233 // small (generally < 100 bytes) and quick to make (and cached and shared)
1234 // so making them eagerly shouldn't be too expensive.
1235 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh);
1236 if (adapter == nullptr ) {
1237 if (!is_init_completed()) {
1238 // Don't throw exceptions during VM initialization because java.lang.* classes
1239 // might not have been initialized, causing problems when constructing the
1240 // Java exception object.
1241 vm_exit_during_initialization("Out of space in CodeCache for adapters");
1242 } else {
1243 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "Out of space in CodeCache for adapters");
1244 }
1245 }
1246
1247 mh->set_adapter_entry(adapter);
1248 mh->_from_compiled_entry = adapter->get_c2i_entry();
1249 return adapter->get_c2i_entry();
1250 }
1929 } else {
1930 return ((mcs != nullptr) ? mcs->invocation_counter()->count() : 0) +
1931 ((mdo != nullptr) ? mdo->invocation_counter()->count() : 0);
1932 }
1933 }
1934
1935 int Method::backedge_count() const {
1936 MethodCounters* mcs = method_counters();
1937 MethodData* mdo = method_data();
1938 if (((mcs != nullptr) ? mcs->backedge_counter()->carry() : false) ||
1939 ((mdo != nullptr) ? mdo->backedge_counter()->carry() : false)) {
1940 return InvocationCounter::count_limit;
1941 } else {
1942 return ((mcs != nullptr) ? mcs->backedge_counter()->count() : 0) +
1943 ((mdo != nullptr) ? mdo->backedge_counter()->count() : 0);
1944 }
1945 }
1946
1947 int Method::highest_comp_level() const {
1948 const MethodCounters* mcs = method_counters();
1949 if (mcs != nullptr) {
1950 return mcs->highest_comp_level();
1951 } else {
1952 return CompLevel_none;
1953 }
1954 }
1955
1956 int Method::highest_osr_comp_level() const {
1957 const MethodCounters* mcs = method_counters();
1958 if (mcs != nullptr) {
1959 return mcs->highest_osr_comp_level();
1960 } else {
1961 return CompLevel_none;
1962 }
1963 }
1964
1965 void Method::set_highest_comp_level(int level) {
1966 MethodCounters* mcs = method_counters();
1967 if (mcs != nullptr) {
1968 mcs->set_highest_comp_level(level);
1969 }
1970 }
|
43 #include "interpreter/oopMapCache.hpp"
44 #include "logging/log.hpp"
45 #include "logging/logStream.hpp"
46 #include "logging/logTag.hpp"
47 #include "memory/allocation.inline.hpp"
48 #include "memory/metadataFactory.hpp"
49 #include "memory/metaspaceClosure.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "nmt/memTracker.hpp"
54 #include "oops/constMethod.hpp"
55 #include "oops/constantPool.hpp"
56 #include "oops/klass.inline.hpp"
57 #include "oops/method.inline.hpp"
58 #include "oops/methodData.hpp"
59 #include "oops/objArrayKlass.hpp"
60 #include "oops/objArrayOop.inline.hpp"
61 #include "oops/oop.inline.hpp"
62 #include "oops/symbol.hpp"
63 #include "oops/trainingData.hpp"
64 #include "prims/jvmtiExport.hpp"
65 #include "prims/methodHandles.hpp"
66 #include "runtime/atomic.hpp"
67 #include "runtime/arguments.hpp"
68 #include "runtime/continuationEntry.hpp"
69 #include "runtime/frame.inline.hpp"
70 #include "runtime/handles.inline.hpp"
71 #include "runtime/init.hpp"
72 #include "runtime/java.hpp"
73 #include "runtime/orderAccess.hpp"
74 #include "runtime/perfData.hpp"
75 #include "runtime/relocator.hpp"
76 #include "runtime/safepointVerifiers.hpp"
77 #include "runtime/sharedRuntime.hpp"
78 #include "runtime/signature.hpp"
79 #include "runtime/threads.hpp"
80 #include "runtime/vm_version.hpp"
81 #include "utilities/align.hpp"
82 #include "utilities/quickSort.hpp"
83 #include "utilities/vmError.hpp"
165 }
166
167 address Method::get_c2i_no_clinit_check_entry() {
168 assert(VM_Version::supports_fast_class_init_checks(), "");
169 assert(adapter() != nullptr, "must have");
170 return adapter()->get_c2i_no_clinit_check_entry();
171 }
172
173 char* Method::name_and_sig_as_C_string() const {
174 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature());
175 }
176
177 char* Method::name_and_sig_as_C_string(char* buf, int size) const {
178 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size);
179 }
180
181 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) {
182 const char* klass_name = klass->external_name();
183 int klass_name_len = (int)strlen(klass_name);
184 int method_name_len = method_name->utf8_length();
185 int len = klass_name_len + 2 + method_name_len + signature->utf8_length();
186 char* dest = NEW_RESOURCE_ARRAY(char, len + 1);
187 strcpy(dest, klass_name);
188 dest[klass_name_len + 0] = ':';
189 dest[klass_name_len + 1] = ':';
190 strcpy(&dest[klass_name_len + 2], method_name->as_C_string());
191 strcpy(&dest[klass_name_len + 2 + method_name_len], signature->as_C_string());
192 dest[len] = 0;
193 return dest;
194 }
195
196 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) {
197 Symbol* klass_name = klass->name();
198 klass_name->as_klass_external_name(buf, size);
199 int len = (int)strlen(buf);
200
201 if (len < size - 1) {
202 buf[len++] = '.';
203
204 method_name->as_C_string(&(buf[len]), size - len);
205 len = (int)strlen(buf);
206
207 signature->as_C_string(&(buf[len]), size - len);
208 }
209
210 return buf;
211 }
370 address Method::bcp_from(address bcp) const {
371 if (is_native() && bcp == nullptr) {
372 return code_base();
373 } else {
374 return bcp;
375 }
376 }
377
378 int Method::size(bool is_native) {
379 // If native, then include pointers for native_function and signature_handler
380 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0;
381 int extra_words = align_up(extra_bytes, BytesPerWord) / BytesPerWord;
382 return align_metadata_size(header_size() + extra_words);
383 }
384
385 Symbol* Method::klass_name() const {
386 return method_holder()->name();
387 }
388
389 void Method::metaspace_pointers_do(MetaspaceClosure* it) {
390 LogStreamHandle(Trace, cds) lsh;
391 if (lsh.is_enabled()) {
392 lsh.print("Iter(Method): %p ", this);
393 print_external_name(&lsh);
394 lsh.cr();
395 }
396 if (method_holder() != nullptr && !method_holder()->is_rewritten()) {
397 // holder is null for MH intrinsic methods
398 it->push(&_constMethod, MetaspaceClosure::_writable);
399 } else {
400 it->push(&_constMethod);
401 }
402 it->push(&_method_data);
403 it->push(&_method_counters);
404 NOT_PRODUCT(it->push(&_name);)
405 }
406
407 #if INCLUDE_CDS
408 // Attempt to return method to original state. Clear any pointers
409 // (to objects outside the shared spaces). We won't be able to predict
410 // where they should point in a new JVM. Further initialize some
411 // entries now in order allow them to be write protected later.
412
413 void Method::remove_unshareable_info() {
414 unlink_method();
415 if (method_data() != nullptr) {
416 method_data()->remove_unshareable_info();
417 }
418 if (method_counters() != nullptr) {
419 method_counters()->remove_unshareable_info();
420 }
421 JFR_ONLY(REMOVE_METHOD_ID(this);)
422 }
423
424 void Method::restore_unshareable_info(TRAPS) {
425 assert(is_method() && is_valid_method(this), "ensure C++ vtable is restored");
426 if (method_data() != nullptr) {
427 method_data()->restore_unshareable_info(CHECK);
428 }
429 if (method_counters() != nullptr) {
430 method_counters()->restore_unshareable_info(CHECK);
431 }
432 assert(!queued_for_compilation(), "method's queued_for_compilation flag should not be set");
433 assert(!pending_queue_processed(), "method's pending_queued_processed flag should not be set");
434 }
435 #endif
436
437 void Method::set_vtable_index(int index) {
438 if (is_shared() && !MetaspaceShared::remapped_readwrite() && method_holder()->verified_at_dump_time()) {
439 // At runtime initialize_vtable is rerun as part of link_class_impl()
440 // for a shared class loaded by the non-boot loader to obtain the loader
441 // constraints based on the runtime classloaders' context.
442 return; // don't write into the shared class
443 } else {
444 _vtable_index = index;
445 }
446 }
447
448 void Method::set_itable_index(int index) {
449 if (is_shared() && !MetaspaceShared::remapped_readwrite() && method_holder()->verified_at_dump_time()) {
450 // At runtime initialize_itable is rerun as part of link_class_impl()
451 // for a shared class loaded by the non-boot loader to obtain the loader
452 // constraints based on the runtime classloaders' context. The dumptime
453 // itable index should be the same as the runtime index.
580 // Counting based on signed int counters tends to overflow with
581 // longer-running workloads on fast machines. The counters under
582 // consideration here, however, are limited in range by counting
583 // logic. See InvocationCounter:count_limit for example.
584 // No "overflow precautions" need to be implemented here.
585 st->print_cr (" interpreter_invocation_count: " INT32_FORMAT_W(11), interpreter_invocation_count());
586 st->print_cr (" invocation_counter: " INT32_FORMAT_W(11), invocation_count());
587 st->print_cr (" backedge_counter: " INT32_FORMAT_W(11), backedge_count());
588
589 if (method_data() != nullptr) {
590 st->print_cr (" decompile_count: " UINT32_FORMAT_W(11), method_data()->decompile_count());
591 }
592
593 #ifndef PRODUCT
594 if (CountCompiledCalls) {
595 st->print_cr (" compiled_invocation_count: " INT64_FORMAT_W(11), compiled_invocation_count());
596 }
597 #endif
598 }
599
600 MethodTrainingData* Method::training_data_or_null() const {
601 MethodCounters* mcs = method_counters();
602 if (mcs == nullptr) {
603 return nullptr;
604 } else {
605 return mcs->method_training_data();
606 }
607 }
608
609 bool Method::init_training_data(MethodTrainingData* tdata) {
610 MethodCounters* mcs = method_counters();
611 if (mcs == nullptr) {
612 return false;
613 } else {
614 return mcs->init_method_training_data(tdata);
615 }
616 }
617
618 bool Method::install_training_method_data(const methodHandle& method) {
619 MethodTrainingData* mtd = MethodTrainingData::find(method);
620 if (mtd != nullptr && mtd->has_holder() && mtd->final_profile() != nullptr &&
621 mtd->holder() == method() && mtd->final_profile()->method() == method()) { // FIXME
622 Atomic::replace_if_null(&method->_method_data, mtd->final_profile());
623 return true;
624 }
625 return false;
626 }
627
628 // Build a MethodData* object to hold profiling information collected on this
629 // method when requested.
630 void Method::build_profiling_method_data(const methodHandle& method, TRAPS) {
631 if (install_training_method_data(method)) {
632 return;
633 }
634 // Do not profile the method if metaspace has hit an OOM previously
635 // allocating profiling data. Callers clear pending exception so don't
636 // add one here.
637 if (ClassLoaderDataGraph::has_metaspace_oom()) {
638 return;
639 }
640
641 ClassLoaderData* loader_data = method->method_holder()->class_loader_data();
642 MethodData* method_data = MethodData::allocate(loader_data, method, THREAD);
643 if (HAS_PENDING_EXCEPTION) {
644 CompileBroker::log_metaspace_failure();
645 ClassLoaderDataGraph::set_metaspace_oom(true);
646 return; // return the exception (which is cleared)
647 }
648
649 if (!Atomic::replace_if_null(&method->_method_data, method_data)) {
650 MetadataFactory::free_metadata(loader_data, method_data);
651 return;
652 }
653
654 /*
655 LogStreamHandle(Info, mdo) lsh;
656 if (lsh.is_enabled()) {
657 ResourceMark rm(THREAD);
658 lsh.print("build_profiling_method_data for ");
659 method->print_name(&lsh);
660 lsh.cr();
661 }
662 */
663 if (ForceProfiling && TrainingData::need_data()) {
664 MethodTrainingData* mtd = MethodTrainingData::make(method, false);
665 guarantee(mtd != nullptr, "");
666 }
667 if (PrintMethodData) {
668 ResourceMark rm(THREAD);
669 tty->print("build_profiling_method_data for ");
670 method->print_name(tty);
671 tty->cr();
672 // At the end of the run, the MDO, full of data, will be dumped.
673 }
674 }
675
676 MethodCounters* Method::build_method_counters(Thread* current, Method* m) {
677 // Do not profile the method if metaspace has hit an OOM previously
678 if (ClassLoaderDataGraph::has_metaspace_oom()) {
679 return nullptr;
680 }
681
682 methodHandle mh(current, m);
683 MethodCounters* counters;
684 if (current->is_Java_thread()) {
685 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
686 // Use the TRAPS version for a JavaThread so it will adjust the GC threshold
687 // if needed.
688 counters = MethodCounters::allocate_with_exception(mh, THREAD);
689 if (HAS_PENDING_EXCEPTION) {
690 CLEAR_PENDING_EXCEPTION;
691 }
692 } else {
693 // Call metaspace allocation that doesn't throw exception if the
694 // current thread isn't a JavaThread, ie. the VMThread.
695 counters = MethodCounters::allocate_no_exception(mh);
696 }
697
698 if (counters == nullptr) {
699 CompileBroker::log_metaspace_failure();
700 ClassLoaderDataGraph::set_metaspace_oom(true);
701 return nullptr;
702 }
703
704 if (!mh->init_method_counters(counters)) {
705 MetadataFactory::free_metadata(mh->method_holder()->class_loader_data(), counters);
706 }
707
708 if (ForceProfiling && TrainingData::need_data()) {
709 MethodTrainingData* mtd = MethodTrainingData::make(mh, false);
710 guarantee(mtd != nullptr, "");
711 }
712
713 return mh->method_counters();
714 }
715
716 bool Method::init_method_counters(MethodCounters* counters) {
717 // Try to install a pointer to MethodCounters, return true on success.
718 return Atomic::replace_if_null(&_method_counters, counters);
719 }
720
721 void Method::set_exception_handler_entered(int handler_bci) {
722 if (ProfileExceptionHandlers) {
723 MethodData* mdo = method_data();
724 if (mdo != nullptr) {
725 BitData handler_data = mdo->exception_handler_bci_to_data(handler_bci);
726 handler_data.set_exception_handler_entered();
727 }
728 }
729 }
730
731 int Method::extra_stack_words() {
732 // not an inline function, to avoid a header dependency on Interpreter
919 return (is_static() ||
920 method_holder()->major_version() < 51);
921 }
922
923 bool Method::is_static_initializer() const {
924 // For classfiles version 51 or greater, ensure that the clinit method is
925 // static. Non-static methods with the name "<clinit>" are not static
926 // initializers. (older classfiles exempted for backward compatibility)
927 return name() == vmSymbols::class_initializer_name() &&
928 has_valid_initializer_flags();
929 }
930
931 bool Method::is_object_initializer() const {
932 return name() == vmSymbols::object_initializer_name();
933 }
934
935 bool Method::needs_clinit_barrier() const {
936 return is_static() && !method_holder()->is_initialized();
937 }
938
939 bool Method::code_has_clinit_barriers() const {
940 nmethod* nm = code();
941 return (nm != nullptr) && nm->has_clinit_barriers();
942 }
943
944 bool Method::is_object_wait0() const {
945 return klass_name() == vmSymbols::java_lang_Object()
946 && name() == vmSymbols::wait_name();
947 }
948
949 objArrayHandle Method::resolved_checked_exceptions_impl(Method* method, TRAPS) {
950 int length = method->checked_exceptions_length();
951 if (length == 0) { // common case
952 return objArrayHandle(THREAD, Universe::the_empty_class_array());
953 } else {
954 methodHandle h_this(THREAD, method);
955 objArrayOop m_oop = oopFactory::new_objArray(vmClasses::Class_klass(), length, CHECK_(objArrayHandle()));
956 objArrayHandle mirrors (THREAD, m_oop);
957 for (int i = 0; i < length; i++) {
958 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe
959 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle()));
960 if (log_is_enabled(Warning, exceptions) &&
961 !k->is_subclass_of(vmClasses::Throwable_klass())) {
962 ResourceMark rm(THREAD);
963 log_warning(exceptions)(
1208 }
1209
1210 #if INCLUDE_CDS
1211 // Called by class data sharing to remove any entry points (which are not shared)
1212 void Method::unlink_method() {
1213 assert(CDSConfig::is_dumping_archive(), "sanity");
1214 _code = nullptr;
1215 _adapter = nullptr;
1216 _i2i_entry = nullptr;
1217 _from_compiled_entry = nullptr;
1218 _from_interpreted_entry = nullptr;
1219
1220 if (is_native()) {
1221 *native_function_addr() = nullptr;
1222 set_signature_handler(nullptr);
1223 }
1224 NOT_PRODUCT(set_compiled_invocation_count(0);)
1225
1226 clear_method_data();
1227 clear_method_counters();
1228 clear_is_not_c1_compilable();
1229 clear_is_not_c1_osr_compilable();
1230 clear_is_not_c2_compilable();
1231 clear_is_not_c2_osr_compilable();
1232 clear_queued_for_compilation();
1233 set_pending_queue_processed(false);
1234 remove_unshareable_flags();
1235 }
1236
1237 void Method::remove_unshareable_flags() {
1238 // clear all the flags that shouldn't be in the archived version
1239 assert(!is_old(), "must be");
1240 assert(!is_obsolete(), "must be");
1241 assert(!is_deleted(), "must be");
1242
1243 set_is_prefixed_native(false);
1244 set_queued_for_compilation(false);
1245 set_pending_queue_processed(false);
1246 set_is_not_c2_compilable(false);
1247 set_is_not_c1_compilable(false);
1248 set_is_not_c2_osr_compilable(false);
1249 set_on_stack_flag(false);
1250 set_has_upcall_on_method_entry(false);
1251 set_has_upcall_on_method_exit(false);
1252 }
1253 #endif
1254
1255 // Called when the method_holder is getting linked. Setup entrypoints so the method
1256 // is ready to be called from interpreter, compiler, and vtables.
1257 void Method::link_method(const methodHandle& h_method, TRAPS) {
1258 if (log_is_enabled(Info, perf, class, link)) {
1259 ClassLoader::perf_ik_link_methods_count()->inc();
1260 }
1261
1262 // If the code cache is full, we may reenter this function for the
1263 // leftover methods that weren't linked.
1264 if (adapter() != nullptr) {
1265 return;
1266 }
1267 assert( _code == nullptr, "nothing compiled yet" );
1268
1269 // Setup interpreter entrypoint
1270 assert(this == h_method(), "wrong h_method()" );
1271
1290 // called from the vtable. We need adapters on such methods that get loaded
1291 // later. Ditto for mega-morphic itable calls. If this proves to be a
1292 // problem we'll make these lazily later.
1293 (void) make_adapters(h_method, CHECK);
1294
1295 // ONLY USE the h_method now as make_adapter may have blocked
1296
1297 if (h_method->is_continuation_native_intrinsic()) {
1298 _from_interpreted_entry = nullptr;
1299 _from_compiled_entry = nullptr;
1300 _i2i_entry = nullptr;
1301 if (Continuations::enabled()) {
1302 assert(!Threads::is_vm_complete(), "should only be called during vm init");
1303 AdapterHandlerLibrary::create_native_wrapper(h_method);
1304 if (!h_method->has_compiled_code()) {
1305 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Initial size of CodeCache is too small");
1306 }
1307 assert(_from_interpreted_entry == get_i2c_entry(), "invariant");
1308 }
1309 }
1310 if (_preload_code != nullptr) {
1311 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
1312 set_code(h_method, _preload_code);
1313 assert(((nmethod*)_preload_code)->scc_entry() == _scc_entry, "sanity");
1314 }
1315 }
1316
1317 address Method::make_adapters(const methodHandle& mh, TRAPS) {
1318 PerfTraceElapsedTime timer(ClassLoader::perf_method_adapters_time());
1319
1320 // Adapters for compiled code are made eagerly here. They are fairly
1321 // small (generally < 100 bytes) and quick to make (and cached and shared)
1322 // so making them eagerly shouldn't be too expensive.
1323 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh);
1324 if (adapter == nullptr ) {
1325 if (!is_init_completed()) {
1326 // Don't throw exceptions during VM initialization because java.lang.* classes
1327 // might not have been initialized, causing problems when constructing the
1328 // Java exception object.
1329 vm_exit_during_initialization("Out of space in CodeCache for adapters");
1330 } else {
1331 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "Out of space in CodeCache for adapters");
1332 }
1333 }
1334
1335 mh->set_adapter_entry(adapter);
1336 mh->_from_compiled_entry = adapter->get_c2i_entry();
1337 return adapter->get_c2i_entry();
1338 }
2017 } else {
2018 return ((mcs != nullptr) ? mcs->invocation_counter()->count() : 0) +
2019 ((mdo != nullptr) ? mdo->invocation_counter()->count() : 0);
2020 }
2021 }
2022
2023 int Method::backedge_count() const {
2024 MethodCounters* mcs = method_counters();
2025 MethodData* mdo = method_data();
2026 if (((mcs != nullptr) ? mcs->backedge_counter()->carry() : false) ||
2027 ((mdo != nullptr) ? mdo->backedge_counter()->carry() : false)) {
2028 return InvocationCounter::count_limit;
2029 } else {
2030 return ((mcs != nullptr) ? mcs->backedge_counter()->count() : 0) +
2031 ((mdo != nullptr) ? mdo->backedge_counter()->count() : 0);
2032 }
2033 }
2034
2035 int Method::highest_comp_level() const {
2036 const MethodCounters* mcs = method_counters();
2037 nmethod* nm = code();
2038 int level = (nm != nullptr) ? nm->comp_level() : CompLevel_none;
2039 if (mcs != nullptr) {
2040 return MAX2(mcs->highest_comp_level(), level);
2041 } else {
2042 return CompLevel_none;
2043 }
2044 }
2045
2046 int Method::highest_osr_comp_level() const {
2047 const MethodCounters* mcs = method_counters();
2048 if (mcs != nullptr) {
2049 return mcs->highest_osr_comp_level();
2050 } else {
2051 return CompLevel_none;
2052 }
2053 }
2054
2055 void Method::set_highest_comp_level(int level) {
2056 MethodCounters* mcs = method_counters();
2057 if (mcs != nullptr) {
2058 mcs->set_highest_comp_level(level);
2059 }
2060 }
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