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 "ci/ciCallProfile.hpp"
27 #include "ci/ciExceptionHandler.hpp"
28 #include "ci/ciInstanceKlass.hpp"
29 #include "ci/ciMethod.hpp"
30 #include "ci/ciMethodBlocks.hpp"
31 #include "ci/ciMethodData.hpp"
32 #include "ci/ciStreams.hpp"
33 #include "ci/ciSymbol.hpp"
34 #include "ci/ciReplay.hpp"
35 #include "ci/ciSymbols.hpp"
36 #include "ci/ciUtilities.inline.hpp"
37 #include "compiler/abstractCompiler.hpp"
38 #include "compiler/compilerDefinitions.inline.hpp"
39 #include "compiler/compilerOracle.hpp"
40 #include "compiler/methodLiveness.hpp"
41 #include "interpreter/interpreter.hpp"
42 #include "interpreter/linkResolver.hpp"
43 #include "interpreter/oopMapCache.hpp"
44 #include "logging/log.hpp"
45 #include "logging/logStream.hpp"
46 #include "memory/allocation.inline.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "oops/generateOopMap.hpp"
49 #include "oops/method.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "prims/methodHandles.hpp"
52 #include "runtime/deoptimization.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "utilities/bitMap.inline.hpp"
55 #include "utilities/xmlstream.hpp"
56 #ifdef COMPILER2
57 #include "ci/bcEscapeAnalyzer.hpp"
58 #include "ci/ciTypeFlow.hpp"
59 #include "oops/method.hpp"
60 #endif
61
62 // ciMethod
63 //
64 // This class represents a Method* in the HotSpot virtual
65 // machine.
66
67
68 // ------------------------------------------------------------------
69 // ciMethod::ciMethod
70 //
125 } else {
126 // Have to use a conservative value in this case.
127 _can_be_statically_bound = false;
128 _can_omit_stack_trace = true;
129 }
130
131 // Adjust the definition of this condition to be more useful:
132 // %%% take these conditions into account in vtable generation
133 if (!_can_be_statically_bound && h_m->is_private())
134 _can_be_statically_bound = true;
135 if (_can_be_statically_bound && h_m->is_abstract())
136 _can_be_statically_bound = false;
137
138 // generating _signature may allow GC and therefore move m.
139 // These fields are always filled in.
140 _name = env->get_symbol(h_m->name());
141 ciSymbol* sig_symbol = env->get_symbol(h_m->signature());
142 constantPoolHandle cpool(Thread::current(), h_m->constants());
143 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
144 _method_data = nullptr;
145 // Take a snapshot of these values, so they will be commensurate with the MDO.
146 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) {
147 int invcnt = h_m->interpreter_invocation_count();
148 // if the value overflowed report it as max int
149 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
150 _interpreter_throwout_count = h_m->interpreter_throwout_count();
151 } else {
152 _interpreter_invocation_count = 0;
153 _interpreter_throwout_count = 0;
154 }
155 if (_interpreter_invocation_count == 0)
156 _interpreter_invocation_count = 1;
157 _inline_instructions_size = -1;
158 if (ReplayCompiles) {
159 ciReplay::initialize(this);
160 }
161 }
162
163
164 // ------------------------------------------------------------------
165 // ciMethod::ciMethod
166 //
167 // Unloaded method.
168 ciMethod::ciMethod(ciInstanceKlass* holder,
169 ciSymbol* name,
170 ciSymbol* signature,
171 ciInstanceKlass* accessor) :
172 ciMetadata((Metadata*)nullptr),
173 _name( name),
174 _holder( holder),
175 _method_data( nullptr),
176 _method_blocks( nullptr),
177 _intrinsic_id( vmIntrinsics::_none),
178 _inline_instructions_size(-1),
179 _can_be_statically_bound(false),
180 _can_omit_stack_trace(true),
181 _liveness( nullptr)
182 #if defined(COMPILER2)
183 ,
184 _flow( nullptr),
185 _bcea( nullptr)
186 #endif // COMPILER2
187 {
188 // Usually holder and accessor are the same type but in some cases
189 // the holder has the wrong class loader (e.g. invokedynamic call
190 // sites) so we pass the accessor.
191 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
192 }
193
194
195 // ------------------------------------------------------------------
196 // ciMethod::load_code
197 //
198 // Load the bytecodes and exception handler table for this method.
199 void ciMethod::load_code() {
200 VM_ENTRY_MARK;
965 bool ciMethod::is_object_initializer() const {
966 return name() == ciSymbols::object_initializer_name();
967 }
968
969 // ------------------------------------------------------------------
970 // ciMethod::has_member_arg
971 //
972 // Return true if the method is a linker intrinsic like _linkToVirtual.
973 // These are built by the JVM.
974 bool ciMethod::has_member_arg() const {
975 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
976 return (MethodHandles::is_signature_polymorphic(iid) &&
977 MethodHandles::has_member_arg(iid));
978 }
979
980 // ------------------------------------------------------------------
981 // ciMethod::ensure_method_data
982 //
983 // Generate new MethodData* objects at compile time.
984 // Return true if allocation was successful or no MDO is required.
985 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
986 EXCEPTION_CONTEXT;
987 if (is_native() || is_abstract() || h_m()->is_accessor()) {
988 return true;
989 }
990 if (h_m()->method_data() == nullptr) {
991 Method::build_profiling_method_data(h_m, THREAD);
992 if (HAS_PENDING_EXCEPTION) {
993 CLEAR_PENDING_EXCEPTION;
994 }
995 }
996 if (h_m()->method_data() != nullptr) {
997 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
998 return _method_data->load_data();
999 } else {
1000 _method_data = CURRENT_ENV->get_empty_methodData();
1001 return false;
1002 }
1003 }
1004
1005 // public, retroactive version
1006 bool ciMethod::ensure_method_data() {
1007 bool result = true;
1008 if (_method_data == nullptr || _method_data->is_empty()) {
1009 GUARDED_VM_ENTRY({
1010 methodHandle mh(Thread::current(), get_Method());
1011 result = ensure_method_data(mh);
1012 });
1013 }
1014 return result;
1015 }
1016
1017
1018 // ------------------------------------------------------------------
1019 // ciMethod::method_data
1020 //
1021 ciMethodData* ciMethod::method_data() {
1022 if (_method_data != nullptr) {
1023 return _method_data;
1024 }
1025 VM_ENTRY_MARK;
1026 ciEnv* env = CURRENT_ENV;
1027 Thread* my_thread = JavaThread::current();
1028 methodHandle h_m(my_thread, get_Method());
1029
1030 if (h_m()->method_data() != nullptr) {
1031 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1032 _method_data->load_data();
1033 } else {
1034 _method_data = CURRENT_ENV->get_empty_methodData();
1035 }
1036 return _method_data;
1037
1038 }
1039
1040 // ------------------------------------------------------------------
1041 // ciMethod::method_data_or_null
1042 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1043 // null otherwise.
1044 ciMethodData* ciMethod::method_data_or_null() {
1045 ciMethodData *md = method_data();
1046 if (md->is_empty()) {
1047 return nullptr;
1048 }
1049 return md;
1050 }
1051
1052 // ------------------------------------------------------------------
1053 // ciMethod::ensure_method_counters
1054 //
1055 MethodCounters* ciMethod::ensure_method_counters() {
1056 check_is_loaded();
1057 VM_ENTRY_MARK;
1072
1073 // ------------------------------------------------------------------
1074 // ciMethod::has_option_value
1075 //
1076 bool ciMethod::has_option_value(CompileCommandEnum option, double& value) {
1077 check_is_loaded();
1078 VM_ENTRY_MARK;
1079 methodHandle mh(THREAD, get_Method());
1080 return CompilerOracle::has_option_value(mh, option, value);
1081 }
1082 // ------------------------------------------------------------------
1083 // ciMethod::can_be_compiled
1084 //
1085 // Have previous compilations of this method succeeded?
1086 bool ciMethod::can_be_compiled() {
1087 check_is_loaded();
1088 ciEnv* env = CURRENT_ENV;
1089 if (is_c1_compile(env->comp_level())) {
1090 return _is_c1_compilable;
1091 }
1092 return _is_c2_compilable;
1093 }
1094
1095 // ------------------------------------------------------------------
1096 // ciMethod::has_compiled_code
1097 bool ciMethod::has_compiled_code() {
1098 return inline_instructions_size() > 0;
1099 }
1100
1101 int ciMethod::highest_osr_comp_level() {
1102 check_is_loaded();
1103 VM_ENTRY_MARK;
1104 return get_Method()->highest_osr_comp_level();
1105 }
1106
1107 // ------------------------------------------------------------------
1108 // ciMethod::code_size_for_inlining
1109 //
1110 // Code size for inlining decisions. This method returns a code
1111 // size of 1 for methods which has the ForceInline annotation.
1112 int ciMethod::code_size_for_inlining() {
1113 check_is_loaded();
1114 if (get_Method()->force_inline()) {
1115 return 1;
1116 }
1117 return code_size();
1118 }
1119
1120 // ------------------------------------------------------------------
1121 // ciMethod::inline_instructions_size
1122 //
1123 // This is a rough metric for "fat" methods, compared before inlining
1124 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1125 // junk like exception handler, stubs, and constant table, which are
1126 // not highly relevant to an inlined method. So we use the more
1127 // specific accessor nmethod::insts_size.
1128 // Also some instructions inside the code are excluded from inline
1129 // heuristic (e.g. post call nop instructions and GC barriers;
1130 // see InlineSkippedInstructionsCounter).
1131 int ciMethod::inline_instructions_size() {
1132 if (_inline_instructions_size == -1) {
1133 GUARDED_VM_ENTRY(
1134 nmethod* code = get_Method()->code();
1135 if (code != nullptr && (code->comp_level() == CompLevel_full_optimization)) {
1136 int isize = code->inline_insts_size();
1137 _inline_instructions_size = isize > 0 ? isize : 0;
1138 } else {
1139 _inline_instructions_size = 0;
1140 }
1141 );
1142 }
1143 return _inline_instructions_size;
1144 }
1145
1146 // ------------------------------------------------------------------
1147 // ciMethod::log_nmethod_identity
1148 void ciMethod::log_nmethod_identity(xmlStream* log) {
1149 GUARDED_VM_ENTRY(
1150 nmethod* code = get_Method()->code();
1151 if (code != nullptr) {
1152 code->log_identity(log);
1153 }
1154 )
1155 }
1156
1157 // ------------------------------------------------------------------
1158 // ciMethod::is_not_reached
1159 bool ciMethod::is_not_reached(int bci) {
1160 check_is_loaded();
1161 VM_ENTRY_MARK;
1162 return Interpreter::is_not_reached(
1163 methodHandle(THREAD, get_Method()), bci);
1164 }
1165
1166 // ------------------------------------------------------------------
1167 // ciMethod::was_never_executed
1168 bool ciMethod::was_executed_more_than(int times) {
1169 VM_ENTRY_MARK;
1170 return get_Method()->was_executed_more_than(times);
1171 }
1172
1173 // ------------------------------------------------------------------
1174 // ciMethod::has_unloaded_classes_in_signature
1175 bool ciMethod::has_unloaded_classes_in_signature() {
1176 // ciSignature is resolved against some accessing class and
1177 // signature classes aren't required to be local. As a benefit,
1178 // it makes signature classes visible through loader constraints.
1179 // So, encountering an unloaded class signals it is absent both in
1180 // the callee (local) and caller contexts.
1181 return signature()->has_unloaded_classes();
1182 }
1183
1184 // ------------------------------------------------------------------
1185 // ciMethod::is_klass_loaded
1186 bool ciMethod::is_klass_loaded(int refinfo_index, Bytecodes::Code bc, bool must_be_resolved) const {
1187 VM_ENTRY_MARK;
1188 return get_Method()->is_klass_loaded(refinfo_index, bc, must_be_resolved);
|
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 "cds/classPreloader.hpp"
27 #include "ci/ciCallProfile.hpp"
28 #include "ci/ciExceptionHandler.hpp"
29 #include "ci/ciInstanceKlass.hpp"
30 #include "ci/ciMethod.hpp"
31 #include "ci/ciMethodBlocks.hpp"
32 #include "ci/ciMethodData.hpp"
33 #include "ci/ciStreams.hpp"
34 #include "ci/ciSymbol.hpp"
35 #include "ci/ciReplay.hpp"
36 #include "ci/ciSymbols.hpp"
37 #include "ci/ciUtilities.inline.hpp"
38 #include "compiler/compileTask.hpp"
39 #include "compiler/abstractCompiler.hpp"
40 #include "compiler/compilerDefinitions.inline.hpp"
41 #include "compiler/compilerOracle.hpp"
42 #include "compiler/methodLiveness.hpp"
43 #include "interpreter/interpreter.hpp"
44 #include "interpreter/linkResolver.hpp"
45 #include "interpreter/oopMapCache.hpp"
46 #include "logging/log.hpp"
47 #include "logging/logStream.hpp"
48 #include "memory/allocation.inline.hpp"
49 #include "memory/resourceArea.hpp"
50 #include "oops/generateOopMap.hpp"
51 #include "oops/method.inline.hpp"
52 #include "oops/oop.inline.hpp"
53 #include "oops/trainingData.hpp"
54 #include "prims/methodHandles.hpp"
55 #include "runtime/deoptimization.hpp"
56 #include "runtime/handles.inline.hpp"
57 #include "utilities/bitMap.inline.hpp"
58 #include "utilities/xmlstream.hpp"
59 #ifdef COMPILER2
60 #include "ci/bcEscapeAnalyzer.hpp"
61 #include "ci/ciTypeFlow.hpp"
62 #include "oops/method.hpp"
63 #endif
64
65 // ciMethod
66 //
67 // This class represents a Method* in the HotSpot virtual
68 // machine.
69
70
71 // ------------------------------------------------------------------
72 // ciMethod::ciMethod
73 //
128 } else {
129 // Have to use a conservative value in this case.
130 _can_be_statically_bound = false;
131 _can_omit_stack_trace = true;
132 }
133
134 // Adjust the definition of this condition to be more useful:
135 // %%% take these conditions into account in vtable generation
136 if (!_can_be_statically_bound && h_m->is_private())
137 _can_be_statically_bound = true;
138 if (_can_be_statically_bound && h_m->is_abstract())
139 _can_be_statically_bound = false;
140
141 // generating _signature may allow GC and therefore move m.
142 // These fields are always filled in.
143 _name = env->get_symbol(h_m->name());
144 ciSymbol* sig_symbol = env->get_symbol(h_m->signature());
145 constantPoolHandle cpool(Thread::current(), h_m->constants());
146 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
147 _method_data = nullptr;
148 _method_data_recorded = nullptr;
149 // Take a snapshot of these values, so they will be commensurate with the MDO.
150 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) {
151 int invcnt = h_m->interpreter_invocation_count();
152 // if the value overflowed report it as max int
153 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
154 _interpreter_throwout_count = h_m->interpreter_throwout_count();
155 } else {
156 _interpreter_invocation_count = 0;
157 _interpreter_throwout_count = 0;
158 }
159 if (_interpreter_invocation_count == 0)
160 _interpreter_invocation_count = 1;
161 _inline_instructions_size = -1;
162 if (ReplayCompiles) {
163 ciReplay::initialize(this);
164 }
165 DirectiveSet* directives = DirectivesStack::getMatchingDirective(h_m, CURRENT_ENV->task()->compiler());
166 ccstrlist bci_list = directives->TooManyTrapsAtBCIOption;
167 int len = (int)strlen(bci_list);
168 Arena* arena = CURRENT_ENV->arena();
169 _has_trap_at_bci = new (arena) GrowableArray<int>(arena, 2, 0, 0);
170 for (int i = 0; i < len; i++) {
171 int v = -1;
172 int read;
173 if (sscanf(bci_list + i, "%i%n", &v, &read) != 1) {
174 warning("wrong format for TooManyTrapsAtBCI option: \"%s\"", bci_list);
175 break;
176 }
177 assert(v >= 0 && v < (1<<16), "%i", v);
178 _has_trap_at_bci->append_if_missing(v);
179 i += read;
180 }
181 }
182
183
184 // ------------------------------------------------------------------
185 // ciMethod::ciMethod
186 //
187 // Unloaded method.
188 ciMethod::ciMethod(ciInstanceKlass* holder,
189 ciSymbol* name,
190 ciSymbol* signature,
191 ciInstanceKlass* accessor) :
192 ciMetadata((Metadata*)nullptr),
193 _name( name),
194 _holder( holder),
195 _method_data( nullptr),
196 _method_data_recorded( nullptr),
197 _method_blocks( nullptr),
198 _intrinsic_id( vmIntrinsics::_none),
199 _inline_instructions_size(-1),
200 _can_be_statically_bound(false),
201 _can_omit_stack_trace(true),
202 _has_trap_at_bci( nullptr),
203 _liveness( nullptr)
204 #if defined(COMPILER2)
205 ,
206 _flow( nullptr),
207 _bcea( nullptr)
208 #endif // COMPILER2
209 {
210 // Usually holder and accessor are the same type but in some cases
211 // the holder has the wrong class loader (e.g. invokedynamic call
212 // sites) so we pass the accessor.
213 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
214 }
215
216
217 // ------------------------------------------------------------------
218 // ciMethod::load_code
219 //
220 // Load the bytecodes and exception handler table for this method.
221 void ciMethod::load_code() {
222 VM_ENTRY_MARK;
987 bool ciMethod::is_object_initializer() const {
988 return name() == ciSymbols::object_initializer_name();
989 }
990
991 // ------------------------------------------------------------------
992 // ciMethod::has_member_arg
993 //
994 // Return true if the method is a linker intrinsic like _linkToVirtual.
995 // These are built by the JVM.
996 bool ciMethod::has_member_arg() const {
997 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
998 return (MethodHandles::is_signature_polymorphic(iid) &&
999 MethodHandles::has_member_arg(iid));
1000 }
1001
1002 // ------------------------------------------------------------------
1003 // ciMethod::ensure_method_data
1004 //
1005 // Generate new MethodData* objects at compile time.
1006 // Return true if allocation was successful or no MDO is required.
1007 bool ciMethod::ensure_method_data(const methodHandle& h_m, bool training_data_only) {
1008 EXCEPTION_CONTEXT;
1009 if (is_native() || is_abstract() || h_m()->is_accessor()) {
1010 return true;
1011 }
1012 if (h_m()->method_data() == nullptr) {
1013 if (training_data_only) {
1014 Method::install_training_method_data(h_m);
1015 } else {
1016 Method::build_profiling_method_data(h_m, THREAD);
1017 if (HAS_PENDING_EXCEPTION) {
1018 CLEAR_PENDING_EXCEPTION;
1019 }
1020 }
1021 }
1022 if (h_m()->method_data() != nullptr) {
1023 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1024 return _method_data->load_data();
1025 } else {
1026 _method_data = CURRENT_ENV->get_empty_methodData();
1027 return false;
1028 }
1029 }
1030
1031 // public, retroactive version
1032 bool ciMethod::ensure_method_data(bool training_data_only) {
1033 bool result = true;
1034 if (_method_data == nullptr || _method_data->is_empty()) {
1035 GUARDED_VM_ENTRY({
1036 methodHandle mh(Thread::current(), get_Method());
1037 result = ensure_method_data(mh, training_data_only);
1038 });
1039 }
1040 return result;
1041 }
1042
1043
1044 // ------------------------------------------------------------------
1045 // ciMethod::method_data
1046 //
1047 ciMethodData* ciMethod::method_data() {
1048 if (CURRENT_ENV->task()->is_precompiled() && CURRENT_ENV->task()->comp_level() == CompLevel_full_optimization) {
1049 if (_method_data_recorded == nullptr) {
1050 VM_ENTRY_MARK;
1051 methodHandle h_m(thread, get_Method());
1052 MethodTrainingData* mtd = TrainingData::lookup_for(h_m());
1053 MethodData* mdo = (mtd != nullptr ? mtd->final_profile() : nullptr);
1054 DirectiveSet* directives = DirectivesStack::getMatchingDirective(h_m, CURRENT_ENV->task()->compiler());
1055 if (mdo == nullptr || directives->IgnoreRecordedProfileOption) {
1056 if (directives->IgnoreRecordedProfileOption) {
1057 ResourceMark rm;
1058 log_debug(precompile)("Ignore recorded profile for %s", h_m->name_and_sig_as_C_string());
1059 } else {
1060 ResourceMark rm;
1061 log_debug(precompile)("No profile for %s", h_m->name_and_sig_as_C_string());
1062 }
1063 _method_data_recorded = CURRENT_ENV->get_empty_methodData();
1064 } else {
1065 if (mdo->extra_data_lock() == nullptr) {
1066 assert(!HAS_PENDING_EXCEPTION, "");
1067 mdo->restore_unshareable_info(thread);
1068 assert(!HAS_PENDING_EXCEPTION, "");
1069 }
1070 _method_data_recorded = CURRENT_ENV->get_method_data(mdo);
1071 _method_data_recorded->load_data();
1072 {
1073 ResourceMark rm;
1074 log_debug(precompile)("Recorded profile " PTR_FORMAT " for %s", p2i(mdo), h_m->name_and_sig_as_C_string());
1075 }
1076 }
1077 }
1078 assert(_method_data_recorded != nullptr, "");
1079 return _method_data_recorded;
1080 } else {
1081 if (_method_data != nullptr) {
1082 return _method_data;
1083 }
1084 VM_ENTRY_MARK;
1085 methodHandle h_m(thread, get_Method());
1086 MethodData* mdo = h_m()->method_data();
1087 if (mdo != nullptr) {
1088 _method_data = CURRENT_ENV->get_method_data(mdo);
1089 _method_data->load_data();
1090 } else {
1091 _method_data = CURRENT_ENV->get_empty_methodData();
1092 }
1093 return _method_data;
1094 }
1095 }
1096
1097 // ------------------------------------------------------------------
1098 // ciMethod::method_data_or_null
1099 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1100 // null otherwise.
1101 ciMethodData* ciMethod::method_data_or_null() {
1102 ciMethodData *md = method_data();
1103 if (md->is_empty()) {
1104 return nullptr;
1105 }
1106 return md;
1107 }
1108
1109 // ------------------------------------------------------------------
1110 // ciMethod::ensure_method_counters
1111 //
1112 MethodCounters* ciMethod::ensure_method_counters() {
1113 check_is_loaded();
1114 VM_ENTRY_MARK;
1129
1130 // ------------------------------------------------------------------
1131 // ciMethod::has_option_value
1132 //
1133 bool ciMethod::has_option_value(CompileCommandEnum option, double& value) {
1134 check_is_loaded();
1135 VM_ENTRY_MARK;
1136 methodHandle mh(THREAD, get_Method());
1137 return CompilerOracle::has_option_value(mh, option, value);
1138 }
1139 // ------------------------------------------------------------------
1140 // ciMethod::can_be_compiled
1141 //
1142 // Have previous compilations of this method succeeded?
1143 bool ciMethod::can_be_compiled() {
1144 check_is_loaded();
1145 ciEnv* env = CURRENT_ENV;
1146 if (is_c1_compile(env->comp_level())) {
1147 return _is_c1_compilable;
1148 }
1149
1150 #if INCLUDE_JVMCI
1151 if (EnableJVMCI && UseJVMCICompiler &&
1152 env->comp_level() == CompLevel_full_optimization && !ClassPreloader::class_preloading_finished()) {
1153 return false;
1154 }
1155 #endif
1156 return _is_c2_compilable;
1157 }
1158
1159 // ------------------------------------------------------------------
1160 // ciMethod::has_compiled_code
1161 bool ciMethod::has_compiled_code() {
1162 return inline_instructions_size() > 0;
1163 }
1164
1165 int ciMethod::highest_osr_comp_level() {
1166 check_is_loaded();
1167 VM_ENTRY_MARK;
1168 return get_Method()->highest_osr_comp_level();
1169 }
1170
1171 // ------------------------------------------------------------------
1172 // ciMethod::code_size_for_inlining
1173 //
1174 // Code size for inlining decisions. This method returns a code
1175 // size of 1 for methods which has the ForceInline annotation.
1176 int ciMethod::code_size_for_inlining() {
1177 check_is_loaded();
1178 if (get_Method()->force_inline()) {
1179 return 1;
1180 }
1181 return code_size();
1182 }
1183
1184 // ------------------------------------------------------------------
1185 // ciMethod::inline_instructions_size
1186 //
1187 // This is a rough metric for "fat" methods, compared before inlining
1188 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1189 // junk like exception handler, stubs, and constant table, which are
1190 // not highly relevant to an inlined method. So we use the more
1191 // specific accessor nmethod::insts_size.
1192 // Also some instructions inside the code are excluded from inline
1193 // heuristic (e.g. post call nop instructions and GC barriers;
1194 // see InlineSkippedInstructionsCounter).
1195 int ciMethod::inline_instructions_size() {
1196 if (_inline_instructions_size == -1) {
1197 if (TrainingData::have_data()) {
1198 GUARDED_VM_ENTRY(
1199 CompLevel level = static_cast<CompLevel>(CURRENT_ENV->comp_level());
1200 methodHandle top_level_mh(Thread::current(), CURRENT_ENV->task()->method());
1201 MethodTrainingData* mtd = MethodTrainingData::find(top_level_mh);
1202 if (mtd != nullptr) {
1203 CompileTrainingData* ctd = mtd->last_toplevel_compile(level);
1204 if (ctd != nullptr) {
1205 methodHandle mh(Thread::current(), get_Method());
1206 MethodTrainingData* this_mtd = MethodTrainingData::find(mh);
1207 if (this_mtd != nullptr) {
1208 auto r = ctd->ci_records().ciMethod__inline_instructions_size.find(this_mtd);
1209 if (r.is_valid()) {
1210 _inline_instructions_size = r.result();
1211 }
1212 }
1213 }
1214 }
1215 );
1216 }
1217 }
1218 if (_inline_instructions_size == -1) {
1219 GUARDED_VM_ENTRY(
1220 nmethod* code = get_Method()->code();
1221 if (code != nullptr && !code->is_scc() && (code->comp_level() == CompLevel_full_optimization)) {
1222 int isize = code->inline_insts_size();
1223 _inline_instructions_size = isize > 0 ? isize : 0;
1224 } else {
1225 _inline_instructions_size = 0;
1226 }
1227 if (TrainingData::need_data()) {
1228 CompileTrainingData* ctd = CURRENT_ENV->task()->training_data();
1229 if (ctd != nullptr) {
1230 methodHandle mh(Thread::current(), get_Method());
1231 MethodTrainingData* this_mtd = MethodTrainingData::make(mh);
1232 ctd->ci_records().ciMethod__inline_instructions_size.append_if_missing(_inline_instructions_size, this_mtd);
1233 }
1234 }
1235 );
1236 }
1237 return _inline_instructions_size;
1238 }
1239
1240 // ------------------------------------------------------------------
1241 // ciMethod::log_nmethod_identity
1242 void ciMethod::log_nmethod_identity(xmlStream* log) {
1243 GUARDED_VM_ENTRY(
1244 nmethod* code = get_Method()->code();
1245 if (code != nullptr) {
1246 code->log_identity(log);
1247 }
1248 )
1249 }
1250
1251 // ------------------------------------------------------------------
1252 // ciMethod::is_not_reached
1253 bool ciMethod::is_not_reached(int bci) {
1254 check_is_loaded();
1255 VM_ENTRY_MARK;
1256 return Interpreter::is_not_reached(
1257 methodHandle(THREAD, get_Method()), bci);
1258 }
1259
1260 // ------------------------------------------------------------------
1261 // ciMethod::was_never_executed
1262 bool ciMethod::was_executed_more_than(int times) {
1263 // Invocation counter is reset when the Method* is compiled.
1264 // If the method has compiled code we therefore assume it has
1265 // be executed more than n times.
1266 if (is_accessor() || is_empty() || has_compiled_code()) {
1267 // interpreter doesn't bump invocation counter of trivial methods
1268 // compiler does not bump invocation counter of compiled methods
1269 return true;
1270 }
1271 if (!method_data()->is_empty()) {
1272 return (method_data()->invocation_count() > times);
1273 }
1274 VM_ENTRY_MARK;
1275 return get_Method()->was_executed_more_than(times);
1276 }
1277
1278 // ------------------------------------------------------------------
1279 // ciMethod::has_unloaded_classes_in_signature
1280 bool ciMethod::has_unloaded_classes_in_signature() {
1281 // ciSignature is resolved against some accessing class and
1282 // signature classes aren't required to be local. As a benefit,
1283 // it makes signature classes visible through loader constraints.
1284 // So, encountering an unloaded class signals it is absent both in
1285 // the callee (local) and caller contexts.
1286 return signature()->has_unloaded_classes();
1287 }
1288
1289 // ------------------------------------------------------------------
1290 // ciMethod::is_klass_loaded
1291 bool ciMethod::is_klass_loaded(int refinfo_index, Bytecodes::Code bc, bool must_be_resolved) const {
1292 VM_ENTRY_MARK;
1293 return get_Method()->is_klass_loaded(refinfo_index, bc, must_be_resolved);
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