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 static PerfCounter* _perf_change_wx_time;
188
189 // The boot class path consists of 3 ordered pieces:
190 // 1. the module/path pairs specified to --patch-module
191 // --patch-module=<module>=<file>(<pathsep><file>)*
192 // 2. the base piece
193 // [jimage | build with exploded modules]
194 // 3. boot loader append path
195 // [-Xbootclasspath/a]; [jvmti appended entries]
196 //
265 static PerfCounter* perf_classes_linked() { return _perf_classes_linked; }
266 static PerfCounter* perf_class_link_time() { return _perf_class_link_time; }
267 static PerfCounter* perf_class_link_selftime() { return _perf_class_link_selftime; }
268 static PerfCounter* perf_shared_classload_time() { return _perf_shared_classload_time; }
269 static PerfCounter* perf_secondary_hash_time() {
270 return _perf_secondary_hash_time;
271 }
272 static PerfCounter* perf_change_wx_time() {
273 return _perf_change_wx_time;
274 }
275 static PerfCounter* perf_sys_classload_time() { return _perf_sys_classload_time; }
276 static PerfCounter* perf_app_classload_time() { return _perf_app_classload_time; }
277 static PerfCounter* perf_app_classload_selftime() { return _perf_app_classload_selftime; }
278 static PerfCounter* perf_app_classload_count() { return _perf_app_classload_count; }
279 static PerfCounter* perf_define_appclasses() { return _perf_define_appclasses; }
280 static PerfCounter* perf_define_appclass_time() { return _perf_define_appclass_time; }
281 static PerfCounter* perf_define_appclass_selftime() { return _perf_define_appclass_selftime; }
282 static PerfCounter* perf_app_classfile_bytes_read() { return _perf_app_classfile_bytes_read; }
283 static PerfCounter* perf_sys_classfile_bytes_read() { return _perf_sys_classfile_bytes_read; }
284
285 static PerfCounter* perf_ik_link_methods_time() { return _perf_ik_link_methods_time; }
286 static PerfCounter* perf_method_adapters_time() { return _perf_method_adapters_time; }
287 static PerfCounter* perf_ik_link_methods_count() { return _perf_ik_link_methods_count; }
288 static PerfCounter* perf_method_adapters_count() { return _perf_method_adapters_count; }
289
290 static PerfCounter* perf_resolve_invokedynamic_time() { return _perf_resolve_indy_time; }
291 static PerfCounter* perf_resolve_invokehandle_time() { return _perf_resolve_invokehandle_time; }
292 static PerfCounter* perf_resolve_method_handle_time() { return _perf_resolve_mh_time; }
293 static PerfCounter* perf_resolve_method_type_time() { return _perf_resolve_mt_time; }
294
295 static PerfCounter* perf_resolve_invokedynamic_count() { return _perf_resolve_indy_count; }
296 static PerfCounter* perf_resolve_invokehandle_count() { return _perf_resolve_invokehandle_count; }
297 static PerfCounter* perf_resolve_method_handle_count() { return _perf_resolve_mh_count; }
298 static PerfCounter* perf_resolve_method_type_count() { return _perf_resolve_mt_count; }
299
300 static void print_counters(outputStream *st);
301
302 // Record how many calls to Unsafe_DefineClass
303 static PerfCounter* unsafe_defineClassCallCounter() {
304 return _unsafe_defineClassCallCounter;
305 }
306
307 // Modular java runtime image is present vs. a build with exploded modules
308 static bool has_jrt_entry() { return (_jrt_entry != nullptr); }
309 static ClassPathEntry* get_jrt_entry() { return _jrt_entry; }
310 static void close_jrt_image();
311
312 // Add a module's exploded directory to the boot loader's exploded module build list
313 static void add_to_exploded_build_list(JavaThread* current, Symbol* module_name);
314
315 // Search the module list for the class file stream based on the file name and java package
316 static ClassFileStream* search_module_entries(JavaThread* current,
317 const GrowableArray<ModuleClassPathList*>* const module_list,
318 PackageEntry* pkg_entry, // Java package entry derived from the class name
319 const char* const file_name);
356
357 static char* lookup_vm_options();
358
359 // Determines if the named module is present in the
360 // modules jimage file or in the exploded modules directory.
361 static bool is_module_observable(const char* module_name);
362
363 static JImageLocationRef jimage_find_resource(JImageFile* jf, const char* module_name,
364 const char* file_name, jlong &size);
365
366 static void trace_class_path(const char* msg, const char* name = nullptr);
367
368 // VM monitoring and management support
369 static jlong classloader_time_ms();
370 static jlong class_method_total_size();
371 static jlong class_init_count();
372 static jlong class_init_time_ms();
373 static jlong class_verify_time_ms();
374 static jlong class_link_count();
375 static jlong class_link_time_ms();
376
377 // adds a class path to the boot append entries
378 static void add_to_boot_append_entries(ClassPathEntry* new_entry);
379
380 // creates a class path zip entry (returns null if JAR file cannot be opened)
381 static ClassPathZipEntry* create_class_path_zip_entry(const char *path);
382
383 static bool string_ends_with(const char* str, const char* str_to_find);
384
385 // Extract package name from a fully qualified class name
386 // *bad_class_name is set to true if there's a problem with parsing class_name, to
387 // distinguish from a class_name with no package name, as both cases have a null return value
388 static Symbol* package_from_class_name(const Symbol* class_name, bool* bad_class_name = nullptr);
389
390 // Debugging
391 static void verify() PRODUCT_RETURN;
392 };
393
394 // PerfClassTraceTime is used to measure time for class loading related events.
395 // 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 static PerfCounter* _perf_change_wx_time;
194
195 // The boot class path consists of 3 ordered pieces:
196 // 1. the module/path pairs specified to --patch-module
197 // --patch-module=<module>=<file>(<pathsep><file>)*
198 // 2. the base piece
199 // [jimage | build with exploded modules]
200 // 3. boot loader append path
201 // [-Xbootclasspath/a]; [jvmti appended entries]
202 //
271 static PerfCounter* perf_classes_linked() { return _perf_classes_linked; }
272 static PerfCounter* perf_class_link_time() { return _perf_class_link_time; }
273 static PerfCounter* perf_class_link_selftime() { return _perf_class_link_selftime; }
274 static PerfCounter* perf_shared_classload_time() { return _perf_shared_classload_time; }
275 static PerfCounter* perf_secondary_hash_time() {
276 return _perf_secondary_hash_time;
277 }
278 static PerfCounter* perf_change_wx_time() {
279 return _perf_change_wx_time;
280 }
281 static PerfCounter* perf_sys_classload_time() { return _perf_sys_classload_time; }
282 static PerfCounter* perf_app_classload_time() { return _perf_app_classload_time; }
283 static PerfCounter* perf_app_classload_selftime() { return _perf_app_classload_selftime; }
284 static PerfCounter* perf_app_classload_count() { return _perf_app_classload_count; }
285 static PerfCounter* perf_define_appclasses() { return _perf_define_appclasses; }
286 static PerfCounter* perf_define_appclass_time() { return _perf_define_appclass_time; }
287 static PerfCounter* perf_define_appclass_selftime() { return _perf_define_appclass_selftime; }
288 static PerfCounter* perf_app_classfile_bytes_read() { return _perf_app_classfile_bytes_read; }
289 static PerfCounter* perf_sys_classfile_bytes_read() { return _perf_sys_classfile_bytes_read; }
290
291 static PerfCounter* perf_preload_total_time() { return _perf_preload_total_time; }
292 static PerfCounter* perf_preload_time() { return _perf_preload_time; }
293 static PerfCounter* perf_prelink_time() { return _perf_prelink_time; }
294 static PerfCounter* perf_preinit_time() { return _perf_preinit_time; }
295 static PerfCounter* perf_preresolve_time() { return _perf_preresolve_time; }
296 static PerfCounter* perf_ik_link_methods_time() { return _perf_ik_link_methods_time; }
297 static PerfCounter* perf_method_adapters_time() { return _perf_method_adapters_time; }
298 static PerfCounter* perf_ik_link_methods_count() { return _perf_ik_link_methods_count; }
299 static PerfCounter* perf_method_adapters_count() { return _perf_method_adapters_count; }
300
301 static PerfTickCounters* perf_resolve_invokedynamic_time() { return _perf_resolve_indy_time; }
302 static PerfTickCounters* perf_resolve_invokehandle_time() { return _perf_resolve_invokehandle_time; }
303 static PerfTickCounters* perf_resolve_method_handle_time() { return _perf_resolve_mh_time; }
304 static PerfTickCounters* perf_resolve_method_type_time() { return _perf_resolve_mt_time; }
305
306 static PerfCounter* perf_resolve_invokedynamic_count() { return _perf_resolve_indy_count; }
307 static PerfCounter* perf_resolve_invokehandle_count() { return _perf_resolve_invokehandle_count; }
308 static PerfCounter* perf_resolve_method_handle_count() { return _perf_resolve_mh_count; }
309 static PerfCounter* perf_resolve_method_type_count() { return _perf_resolve_mt_count; }
310
311 static PerfCounter* perf_class_init_bytecodes_count() { return _perf_class_init_bytecodes_count; }
312
313 static void print_counters(outputStream *st);
314
315 // Record how many calls to Unsafe_DefineClass
316 static PerfCounter* unsafe_defineClassCallCounter() {
317 return _unsafe_defineClassCallCounter;
318 }
319
320 // Modular java runtime image is present vs. a build with exploded modules
321 static bool has_jrt_entry() { return (_jrt_entry != nullptr); }
322 static ClassPathEntry* get_jrt_entry() { return _jrt_entry; }
323 static void close_jrt_image();
324
325 // Add a module's exploded directory to the boot loader's exploded module build list
326 static void add_to_exploded_build_list(JavaThread* current, Symbol* module_name);
327
328 // Search the module list for the class file stream based on the file name and java package
329 static ClassFileStream* search_module_entries(JavaThread* current,
330 const GrowableArray<ModuleClassPathList*>* const module_list,
331 PackageEntry* pkg_entry, // Java package entry derived from the class name
332 const char* const file_name);
369
370 static char* lookup_vm_options();
371
372 // Determines if the named module is present in the
373 // modules jimage file or in the exploded modules directory.
374 static bool is_module_observable(const char* module_name);
375
376 static JImageLocationRef jimage_find_resource(JImageFile* jf, const char* module_name,
377 const char* file_name, jlong &size);
378
379 static void trace_class_path(const char* msg, const char* name = nullptr);
380
381 // VM monitoring and management support
382 static jlong classloader_time_ms();
383 static jlong class_method_total_size();
384 static jlong class_init_count();
385 static jlong class_init_time_ms();
386 static jlong class_verify_time_ms();
387 static jlong class_link_count();
388 static jlong class_link_time_ms();
389 static jlong class_init_bytecodes_count();
390
391 // adds a class path to the boot append entries
392 static void add_to_boot_append_entries(ClassPathEntry* new_entry);
393
394 // creates a class path zip entry (returns null if JAR file cannot be opened)
395 static ClassPathZipEntry* create_class_path_zip_entry(const char *path);
396
397 static bool string_ends_with(const char* str, const char* str_to_find);
398
399 // Extract package name from a fully qualified class name
400 // *bad_class_name is set to true if there's a problem with parsing class_name, to
401 // distinguish from a class_name with no package name, as both cases have a null return value
402 static Symbol* package_from_class_name(const Symbol* class_name, bool* bad_class_name = nullptr);
403
404 // Debugging
405 static void verify() PRODUCT_RETURN;
406 };
407
408 // PerfClassTraceTime is used to measure time for class loading related events.
409 // This class tracks cumulative time and exclusive time for specific event types.
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