132 ModuleClassPathList(Symbol* module_name);
133 ~ModuleClassPathList();
134 void add_to_list(ClassPathEntry* new_entry);
135 };
136
137 class ClassLoader: AllStatic {
138 public:
139 enum ClassLoaderType {
140 OTHER = 0,
141 BOOT_LOADER = 1, /* boot loader */
142 PLATFORM_LOADER = 2, /* PlatformClassLoader */
143 APP_LOADER = 3 /* AppClassLoader */
144 };
145 protected:
146
147 // Performance counters
148 static PerfCounter* _perf_accumulated_time;
149 static PerfCounter* _perf_classes_inited;
150 static PerfCounter* _perf_class_init_time;
151 static PerfCounter* _perf_class_init_selftime;
152 static PerfCounter* _perf_classes_verified;
153 static PerfCounter* _perf_class_verify_time;
154 static PerfCounter* _perf_class_verify_selftime;
155 static PerfCounter* _perf_classes_linked;
156 static PerfCounter* _perf_class_link_time;
157 static PerfCounter* _perf_class_link_selftime;
158 static PerfCounter* _perf_shared_classload_time;
159 static PerfCounter* _perf_sys_classload_time;
160 static PerfCounter* _perf_app_classload_time;
161 static PerfCounter* _perf_app_classload_selftime;
162 static PerfCounter* _perf_app_classload_count;
163 static PerfCounter* _perf_define_appclasses;
164 static PerfCounter* _perf_define_appclass_time;
165 static PerfCounter* _perf_define_appclass_selftime;
166 static PerfCounter* _perf_app_classfile_bytes_read;
167 static PerfCounter* _perf_sys_classfile_bytes_read;
168 static PerfCounter* _perf_ik_link_methods_time;
169 static PerfCounter* _perf_method_adapters_time;
170 static PerfCounter* _perf_ik_link_methods_count;
171 static PerfCounter* _perf_method_adapters_count;
172
173 static PerfCounter* _perf_resolve_indy_time;
174 static PerfCounter* _perf_resolve_invokehandle_time;
175 static PerfCounter* _perf_resolve_mh_time;
176 static PerfCounter* _perf_resolve_mt_time;
177
178 static PerfCounter* _perf_resolve_indy_count;
179 static PerfCounter* _perf_resolve_invokehandle_count;
180 static PerfCounter* _perf_resolve_mh_count;
181 static PerfCounter* _perf_resolve_mt_count;
182
183 static PerfCounter* _unsafe_defineClassCallCounter;
184
185 // Count the time taken to hash the scondary superclass arrays.
186 static PerfCounter* _perf_secondary_hash_time;
187
188 // The boot class path consists of 3 ordered pieces:
189 // 1. the module/path pairs specified to --patch-module
190 // --patch-module=<module>=<file>(<pathsep><file>)*
191 // 2. the base piece
192 // [jimage | build with exploded modules]
193 // 3. boot loader append path
194 // [-Xbootclasspath/a]; [jvmti appended entries]
195 //
196 // The boot loader must obey this order when attempting
261 static PerfCounter* perf_classes_verified() { return _perf_classes_verified; }
262 static PerfCounter* perf_class_verify_time() { return _perf_class_verify_time; }
263 static PerfCounter* perf_class_verify_selftime() { return _perf_class_verify_selftime; }
264 static PerfCounter* perf_classes_linked() { return _perf_classes_linked; }
265 static PerfCounter* perf_class_link_time() { return _perf_class_link_time; }
266 static PerfCounter* perf_class_link_selftime() { return _perf_class_link_selftime; }
267 static PerfCounter* perf_shared_classload_time() { return _perf_shared_classload_time; }
268 static PerfCounter* perf_secondary_hash_time() {
269 return _perf_secondary_hash_time;
270 }
271 static PerfCounter* perf_sys_classload_time() { return _perf_sys_classload_time; }
272 static PerfCounter* perf_app_classload_time() { return _perf_app_classload_time; }
273 static PerfCounter* perf_app_classload_selftime() { return _perf_app_classload_selftime; }
274 static PerfCounter* perf_app_classload_count() { return _perf_app_classload_count; }
275 static PerfCounter* perf_define_appclasses() { return _perf_define_appclasses; }
276 static PerfCounter* perf_define_appclass_time() { return _perf_define_appclass_time; }
277 static PerfCounter* perf_define_appclass_selftime() { return _perf_define_appclass_selftime; }
278 static PerfCounter* perf_app_classfile_bytes_read() { return _perf_app_classfile_bytes_read; }
279 static PerfCounter* perf_sys_classfile_bytes_read() { return _perf_sys_classfile_bytes_read; }
280
281 static PerfCounter* perf_ik_link_methods_time() { return _perf_ik_link_methods_time; }
282 static PerfCounter* perf_method_adapters_time() { return _perf_method_adapters_time; }
283 static PerfCounter* perf_ik_link_methods_count() { return _perf_ik_link_methods_count; }
284 static PerfCounter* perf_method_adapters_count() { return _perf_method_adapters_count; }
285
286 static PerfCounter* perf_resolve_invokedynamic_time() { return _perf_resolve_indy_time; }
287 static PerfCounter* perf_resolve_invokehandle_time() { return _perf_resolve_invokehandle_time; }
288 static PerfCounter* perf_resolve_method_handle_time() { return _perf_resolve_mh_time; }
289 static PerfCounter* perf_resolve_method_type_time() { return _perf_resolve_mt_time; }
290
291 static PerfCounter* perf_resolve_invokedynamic_count() { return _perf_resolve_indy_count; }
292 static PerfCounter* perf_resolve_invokehandle_count() { return _perf_resolve_invokehandle_count; }
293 static PerfCounter* perf_resolve_method_handle_count() { return _perf_resolve_mh_count; }
294 static PerfCounter* perf_resolve_method_type_count() { return _perf_resolve_mt_count; }
295
296 static void print_counters(outputStream *st);
297
298 // Record how many calls to Unsafe_DefineClass
299 static PerfCounter* unsafe_defineClassCallCounter() {
300 return _unsafe_defineClassCallCounter;
301 }
302
303 // Modular java runtime image is present vs. a build with exploded modules
304 static bool has_jrt_entry() { return (_jrt_entry != nullptr); }
305 static ClassPathEntry* get_jrt_entry() { return _jrt_entry; }
306 static void close_jrt_image();
307
308 // Add a module's exploded directory to the boot loader's exploded module build list
309 static void add_to_exploded_build_list(JavaThread* current, Symbol* module_name);
310
311 // Search the module list for the class file stream based on the file name and java package
312 static ClassFileStream* search_module_entries(JavaThread* current,
313 const GrowableArray<ModuleClassPathList*>* const module_list,
314 PackageEntry* pkg_entry, // Java package entry derived from the class name
315 const char* const file_name);
350
351 static char* lookup_vm_options();
352
353 // Determines if the named module is present in the
354 // modules jimage file or in the exploded modules directory.
355 static bool is_module_observable(const char* module_name);
356
357 static JImageLocationRef jimage_find_resource(JImageFile* jf, const char* module_name,
358 const char* file_name, jlong &size);
359
360 static void trace_class_path(const char* msg, const char* name = nullptr);
361
362 // VM monitoring and management support
363 static jlong classloader_time_ms();
364 static jlong class_method_total_size();
365 static jlong class_init_count();
366 static jlong class_init_time_ms();
367 static jlong class_verify_time_ms();
368 static jlong class_link_count();
369 static jlong class_link_time_ms();
370
371 // adds a class path to the boot append entries
372 static void add_to_boot_append_entries(ClassPathEntry* new_entry);
373
374 // creates a class path zip entry (returns null if JAR file cannot be opened)
375 static ClassPathZipEntry* create_class_path_zip_entry(const char *path);
376
377 static bool string_ends_with(const char* str, const char* str_to_find);
378
379 // Extract package name from a fully qualified class name
380 // *bad_class_name is set to true if there's a problem with parsing class_name, to
381 // distinguish from a class_name with no package name, as both cases have a null return value
382 static Symbol* package_from_class_name(const Symbol* class_name, bool* bad_class_name = nullptr);
383
384 // Debugging
385 static void verify() PRODUCT_RETURN;
386 };
387
388 // PerfClassTraceTime is used to measure time for class loading related events.
389 // This class tracks cumulative time and exclusive time for specific event types.
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132 ModuleClassPathList(Symbol* module_name);
133 ~ModuleClassPathList();
134 void add_to_list(ClassPathEntry* new_entry);
135 };
136
137 class ClassLoader: AllStatic {
138 public:
139 enum ClassLoaderType {
140 OTHER = 0,
141 BOOT_LOADER = 1, /* boot loader */
142 PLATFORM_LOADER = 2, /* PlatformClassLoader */
143 APP_LOADER = 3 /* AppClassLoader */
144 };
145 protected:
146
147 // Performance counters
148 static PerfCounter* _perf_accumulated_time;
149 static PerfCounter* _perf_classes_inited;
150 static PerfCounter* _perf_class_init_time;
151 static PerfCounter* _perf_class_init_selftime;
152 static PerfCounter* _perf_class_init_bytecodes_count;
153 static PerfCounter* _perf_classes_verified;
154 static PerfCounter* _perf_class_verify_time;
155 static PerfCounter* _perf_class_verify_selftime;
156 static PerfCounter* _perf_classes_linked;
157 static PerfCounter* _perf_class_link_time;
158 static PerfCounter* _perf_class_link_selftime;
159 static PerfCounter* _perf_shared_classload_time;
160 static PerfCounter* _perf_sys_classload_time;
161 static PerfCounter* _perf_app_classload_time;
162 static PerfCounter* _perf_app_classload_selftime;
163 static PerfCounter* _perf_app_classload_count;
164 static PerfCounter* _perf_define_appclasses;
165 static PerfCounter* _perf_define_appclass_time;
166 static PerfCounter* _perf_define_appclass_selftime;
167 static PerfCounter* _perf_app_classfile_bytes_read;
168 static PerfCounter* _perf_sys_classfile_bytes_read;
169 static PerfCounter* _perf_preload_total_time;
170 static PerfCounter* _perf_preload_time;
171 static PerfCounter* _perf_prelink_time;
172 static PerfCounter* _perf_preinit_time;
173 static PerfCounter* _perf_preresolve_time;
174 static PerfCounter* _perf_ik_link_methods_time;
175 static PerfCounter* _perf_method_adapters_time;
176 static PerfCounter* _perf_ik_link_methods_count;
177 static PerfCounter* _perf_method_adapters_count;
178
179 static PerfTickCounters* _perf_resolve_indy_time;
180 static PerfTickCounters* _perf_resolve_invokehandle_time;
181 static PerfTickCounters* _perf_resolve_mh_time;
182 static PerfTickCounters* _perf_resolve_mt_time;
183
184 static PerfCounter* _perf_resolve_indy_count;
185 static PerfCounter* _perf_resolve_invokehandle_count;
186 static PerfCounter* _perf_resolve_mh_count;
187 static PerfCounter* _perf_resolve_mt_count;
188
189 static PerfCounter* _unsafe_defineClassCallCounter;
190
191 // Count the time taken to hash the scondary superclass arrays.
192 static PerfCounter* _perf_secondary_hash_time;
193
194 // The boot class path consists of 3 ordered pieces:
195 // 1. the module/path pairs specified to --patch-module
196 // --patch-module=<module>=<file>(<pathsep><file>)*
197 // 2. the base piece
198 // [jimage | build with exploded modules]
199 // 3. boot loader append path
200 // [-Xbootclasspath/a]; [jvmti appended entries]
201 //
202 // The boot loader must obey this order when attempting
267 static PerfCounter* perf_classes_verified() { return _perf_classes_verified; }
268 static PerfCounter* perf_class_verify_time() { return _perf_class_verify_time; }
269 static PerfCounter* perf_class_verify_selftime() { return _perf_class_verify_selftime; }
270 static PerfCounter* perf_classes_linked() { return _perf_classes_linked; }
271 static PerfCounter* perf_class_link_time() { return _perf_class_link_time; }
272 static PerfCounter* perf_class_link_selftime() { return _perf_class_link_selftime; }
273 static PerfCounter* perf_shared_classload_time() { return _perf_shared_classload_time; }
274 static PerfCounter* perf_secondary_hash_time() {
275 return _perf_secondary_hash_time;
276 }
277 static PerfCounter* perf_sys_classload_time() { return _perf_sys_classload_time; }
278 static PerfCounter* perf_app_classload_time() { return _perf_app_classload_time; }
279 static PerfCounter* perf_app_classload_selftime() { return _perf_app_classload_selftime; }
280 static PerfCounter* perf_app_classload_count() { return _perf_app_classload_count; }
281 static PerfCounter* perf_define_appclasses() { return _perf_define_appclasses; }
282 static PerfCounter* perf_define_appclass_time() { return _perf_define_appclass_time; }
283 static PerfCounter* perf_define_appclass_selftime() { return _perf_define_appclass_selftime; }
284 static PerfCounter* perf_app_classfile_bytes_read() { return _perf_app_classfile_bytes_read; }
285 static PerfCounter* perf_sys_classfile_bytes_read() { return _perf_sys_classfile_bytes_read; }
286
287 static PerfCounter* perf_preload_total_time() { return _perf_preload_total_time; }
288 static PerfCounter* perf_preload_time() { return _perf_preload_time; }
289 static PerfCounter* perf_prelink_time() { return _perf_prelink_time; }
290 static PerfCounter* perf_preinit_time() { return _perf_preinit_time; }
291 static PerfCounter* perf_preresolve_time() { return _perf_preresolve_time; }
292 static PerfCounter* perf_ik_link_methods_time() { return _perf_ik_link_methods_time; }
293 static PerfCounter* perf_method_adapters_time() { return _perf_method_adapters_time; }
294 static PerfCounter* perf_ik_link_methods_count() { return _perf_ik_link_methods_count; }
295 static PerfCounter* perf_method_adapters_count() { return _perf_method_adapters_count; }
296
297 static PerfTickCounters* perf_resolve_invokedynamic_time() { return _perf_resolve_indy_time; }
298 static PerfTickCounters* perf_resolve_invokehandle_time() { return _perf_resolve_invokehandle_time; }
299 static PerfTickCounters* perf_resolve_method_handle_time() { return _perf_resolve_mh_time; }
300 static PerfTickCounters* perf_resolve_method_type_time() { return _perf_resolve_mt_time; }
301
302 static PerfCounter* perf_resolve_invokedynamic_count() { return _perf_resolve_indy_count; }
303 static PerfCounter* perf_resolve_invokehandle_count() { return _perf_resolve_invokehandle_count; }
304 static PerfCounter* perf_resolve_method_handle_count() { return _perf_resolve_mh_count; }
305 static PerfCounter* perf_resolve_method_type_count() { return _perf_resolve_mt_count; }
306
307 static PerfCounter* perf_class_init_bytecodes_count() { return _perf_class_init_bytecodes_count; }
308
309 static void print_counters(outputStream *st);
310
311 // Record how many calls to Unsafe_DefineClass
312 static PerfCounter* unsafe_defineClassCallCounter() {
313 return _unsafe_defineClassCallCounter;
314 }
315
316 // Modular java runtime image is present vs. a build with exploded modules
317 static bool has_jrt_entry() { return (_jrt_entry != nullptr); }
318 static ClassPathEntry* get_jrt_entry() { return _jrt_entry; }
319 static void close_jrt_image();
320
321 // Add a module's exploded directory to the boot loader's exploded module build list
322 static void add_to_exploded_build_list(JavaThread* current, Symbol* module_name);
323
324 // Search the module list for the class file stream based on the file name and java package
325 static ClassFileStream* search_module_entries(JavaThread* current,
326 const GrowableArray<ModuleClassPathList*>* const module_list,
327 PackageEntry* pkg_entry, // Java package entry derived from the class name
328 const char* const file_name);
363
364 static char* lookup_vm_options();
365
366 // Determines if the named module is present in the
367 // modules jimage file or in the exploded modules directory.
368 static bool is_module_observable(const char* module_name);
369
370 static JImageLocationRef jimage_find_resource(JImageFile* jf, const char* module_name,
371 const char* file_name, jlong &size);
372
373 static void trace_class_path(const char* msg, const char* name = nullptr);
374
375 // VM monitoring and management support
376 static jlong classloader_time_ms();
377 static jlong class_method_total_size();
378 static jlong class_init_count();
379 static jlong class_init_time_ms();
380 static jlong class_verify_time_ms();
381 static jlong class_link_count();
382 static jlong class_link_time_ms();
383 static jlong class_init_bytecodes_count();
384
385 // adds a class path to the boot append entries
386 static void add_to_boot_append_entries(ClassPathEntry* new_entry);
387
388 // creates a class path zip entry (returns null if JAR file cannot be opened)
389 static ClassPathZipEntry* create_class_path_zip_entry(const char *path);
390
391 static bool string_ends_with(const char* str, const char* str_to_find);
392
393 // Extract package name from a fully qualified class name
394 // *bad_class_name is set to true if there's a problem with parsing class_name, to
395 // distinguish from a class_name with no package name, as both cases have a null return value
396 static Symbol* package_from_class_name(const Symbol* class_name, bool* bad_class_name = nullptr);
397
398 // Debugging
399 static void verify() PRODUCT_RETURN;
400 };
401
402 // PerfClassTraceTime is used to measure time for class loading related events.
403 // This class tracks cumulative time and exclusive time for specific event types.
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