77 private:
78 const char* _dir; // Name of directory
79 public:
80 const char* name() const { return _dir; }
81 ClassPathDirEntry(const char* dir) {
82 _dir = copy_path(dir);
83 }
84 virtual ~ClassPathDirEntry();
85 ClassFileStream* open_stream(JavaThread* current, const char* name);
86 };
87
88 class ClassPathZipEntry: public ClassPathEntry {
89 private:
90 jzfile* _zip; // The zip archive
91 const char* _zip_name; // Name of zip archive
92 bool _from_class_path_attr; // From the "Class-path" attribute of a jar file
93 public:
94 bool is_jar_file() const { return true; }
95 bool from_class_path_attr() const { return _from_class_path_attr; }
96 const char* name() const { return _zip_name; }
97 ClassPathZipEntry(jzfile* zip, const char* zip_name, bool is_boot_append, bool from_class_path_attr);
98 virtual ~ClassPathZipEntry();
99 u1* open_entry(JavaThread* current, const char* name, jint* filesize, bool nul_terminate);
100 ClassFileStream* open_stream(JavaThread* current, const char* name);
101 };
102
103
104 // For java image files
105 class ClassPathImageEntry: public ClassPathEntry {
106 private:
107 const char* _name;
108 DEBUG_ONLY(static ClassPathImageEntry* _singleton;)
109 public:
110 bool is_modules_image() const;
111 const char* name() const { return _name == nullptr ? "" : _name; }
112 JImageFile* jimage() const;
113 JImageFile* jimage_non_null() const;
114 void close_jimage();
115 ClassPathImageEntry(JImageFile* jimage, const char* name);
116 virtual ~ClassPathImageEntry() { ShouldNotReachHere(); }
117 ClassFileStream* open_stream(JavaThread* current, const char* name);
118 ClassFileStream* open_stream_for_loader(JavaThread* current, const char* name, ClassLoaderData* loader_data);
122 // that have been specified for a specific module. Currently,
123 // the only way to specify a module/path pair is via the --patch-module
124 // command line option.
125 class ModuleClassPathList : public CHeapObj<mtClass> {
126 private:
127 Symbol* _module_name;
128 // First and last entries of class path entries for a specific module
129 ClassPathEntry* _module_first_entry;
130 ClassPathEntry* _module_last_entry;
131 public:
132 Symbol* module_name() const { return _module_name; }
133 ClassPathEntry* module_first_entry() const { return _module_first_entry; }
134 ModuleClassPathList(Symbol* module_name);
135 ~ModuleClassPathList();
136 void add_to_list(ClassPathEntry* new_entry);
137 };
138
139 class ClassLoader: AllStatic {
140 public:
141 enum ClassLoaderType {
142 BOOT_LOADER = 1, /* boot loader */
143 PLATFORM_LOADER = 2, /* PlatformClassLoader */
144 APP_LOADER = 3 /* AppClassLoader */
145 };
146 protected:
147
148 // Performance counters
149 static PerfCounter* _perf_accumulated_time;
150 static PerfCounter* _perf_classes_inited;
151 static PerfCounter* _perf_class_init_time;
152 static PerfCounter* _perf_class_init_selftime;
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
170 static PerfCounter* _unsafe_defineClassCallCounter;
171
172 // Count the time taken to hash the scondary superclass arrays.
173 static PerfCounter* _perf_secondary_hash_time;
174
175 // The boot class path consists of 3 ordered pieces:
176 // 1. the module/path pairs specified to --patch-module
177 // --patch-module=<module>=<file>(<pathsep><file>)*
178 // 2. the base piece
179 // [jimage | build with exploded modules]
180 // 3. boot loader append path
181 // [-Xbootclasspath/a]; [jvmti appended entries]
182 //
183 // The boot loader must obey this order when attempting
184 // to load a class.
185
186 // 1. Contains the module/path pairs specified to --patch-module
187 static GrowableArray<ModuleClassPathList*>* _patch_mod_entries;
188
268 static PerfCounter* perf_classes_verified() { return _perf_classes_verified; }
269 static PerfCounter* perf_class_verify_time() { return _perf_class_verify_time; }
270 static PerfCounter* perf_class_verify_selftime() { return _perf_class_verify_selftime; }
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_sys_classload_time() { return _perf_sys_classload_time; }
279 static PerfCounter* perf_app_classload_time() { return _perf_app_classload_time; }
280 static PerfCounter* perf_app_classload_selftime() { return _perf_app_classload_selftime; }
281 static PerfCounter* perf_app_classload_count() { return _perf_app_classload_count; }
282 static PerfCounter* perf_define_appclasses() { return _perf_define_appclasses; }
283 static PerfCounter* perf_define_appclass_time() { return _perf_define_appclass_time; }
284 static PerfCounter* perf_define_appclass_selftime() { return _perf_define_appclass_selftime; }
285 static PerfCounter* perf_app_classfile_bytes_read() { return _perf_app_classfile_bytes_read; }
286 static PerfCounter* perf_sys_classfile_bytes_read() { return _perf_sys_classfile_bytes_read; }
287
288 // Record how many calls to Unsafe_DefineClass
289 static PerfCounter* unsafe_defineClassCallCounter() {
290 return _unsafe_defineClassCallCounter;
291 }
292
293 // Modular java runtime image is present vs. a build with exploded modules
294 static bool has_jrt_entry() { return (_jrt_entry != nullptr); }
295 static ClassPathEntry* get_jrt_entry() { return _jrt_entry; }
296 static void close_jrt_image();
297
298 // Add a module's exploded directory to the boot loader's exploded module build list
299 static void add_to_exploded_build_list(JavaThread* current, Symbol* module_name);
300
301 // Search the module list for the class file stream based on the file name and java package
302 static ClassFileStream* search_module_entries(JavaThread* current,
303 const GrowableArray<ModuleClassPathList*>* const module_list,
304 PackageEntry* pkg_entry, // Java package entry derived from the class name
305 const char* const file_name);
306
307 // Load individual .class file
357
358 static char* lookup_vm_options();
359
360 // Determines if the named module is present in the
361 // modules jimage file or in the exploded modules directory.
362 static bool is_module_observable(const char* module_name);
363
364 static JImageLocationRef jimage_find_resource(JImageFile* jf, const char* module_name,
365 const char* file_name, jlong &size);
366
367 static void trace_class_path(const char* msg, const char* name = nullptr);
368
369 // VM monitoring and management support
370 static jlong classloader_time_ms();
371 static jlong class_method_total_size();
372 static jlong class_init_count();
373 static jlong class_init_time_ms();
374 static jlong class_verify_time_ms();
375 static jlong class_link_count();
376 static jlong class_link_time_ms();
377
378 // adds a class path to the boot append entries
379 static void add_to_boot_append_entries(ClassPathEntry* new_entry);
380
381 // creates a class path zip entry (returns null if JAR file cannot be opened)
382 static ClassPathZipEntry* create_class_path_zip_entry(const char *apath, bool is_boot_append);
383
384 static bool string_ends_with(const char* str, const char* str_to_find);
385
386 // Extract package name from a fully qualified class name
387 // *bad_class_name is set to true if there's a problem with parsing class_name, to
388 // distinguish from a class_name with no package name, as both cases have a null return value
389 static Symbol* package_from_class_name(const Symbol* class_name, bool* bad_class_name = nullptr);
390
391 // Debugging
392 static void verify() PRODUCT_RETURN;
393 };
394
395 // PerfClassTraceTime is used to measure time for class loading related events.
396 // This class tracks cumulative time and exclusive time for specific event types.
397 // During the execution of one event, other event types (e.g. class loading and
398 // resolution) as well as recursive calls of the same event type could happen.
399 // Only one elapsed timer (cumulative) and one thread-local self timer (exclusive)
400 // (i.e. only one event type) are active at a time even multiple PerfClassTraceTime
401 // instances have been created as multiple events are happening.
402 class PerfClassTraceTime {
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77 private:
78 const char* _dir; // Name of directory
79 public:
80 const char* name() const { return _dir; }
81 ClassPathDirEntry(const char* dir) {
82 _dir = copy_path(dir);
83 }
84 virtual ~ClassPathDirEntry();
85 ClassFileStream* open_stream(JavaThread* current, const char* name);
86 };
87
88 class ClassPathZipEntry: public ClassPathEntry {
89 private:
90 jzfile* _zip; // The zip archive
91 const char* _zip_name; // Name of zip archive
92 bool _from_class_path_attr; // From the "Class-path" attribute of a jar file
93 public:
94 bool is_jar_file() const { return true; }
95 bool from_class_path_attr() const { return _from_class_path_attr; }
96 const char* name() const { return _zip_name; }
97 ClassPathZipEntry(jzfile* zip, const char* zip_name, bool from_class_path_attr);
98 virtual ~ClassPathZipEntry();
99 bool has_entry(JavaThread* current, const char* name);
100 u1* open_entry(JavaThread* current, const char* name, jint* filesize, bool nul_terminate);
101 ClassFileStream* open_stream(JavaThread* current, const char* name);
102 };
103
104
105 // For java image files
106 class ClassPathImageEntry: public ClassPathEntry {
107 private:
108 const char* _name;
109 DEBUG_ONLY(static ClassPathImageEntry* _singleton;)
110 public:
111 bool is_modules_image() const;
112 const char* name() const { return _name == nullptr ? "" : _name; }
113 JImageFile* jimage() const;
114 JImageFile* jimage_non_null() const;
115 void close_jimage();
116 ClassPathImageEntry(JImageFile* jimage, const char* name);
117 virtual ~ClassPathImageEntry() { ShouldNotReachHere(); }
118 ClassFileStream* open_stream(JavaThread* current, const char* name);
119 ClassFileStream* open_stream_for_loader(JavaThread* current, const char* name, ClassLoaderData* loader_data);
123 // that have been specified for a specific module. Currently,
124 // the only way to specify a module/path pair is via the --patch-module
125 // command line option.
126 class ModuleClassPathList : public CHeapObj<mtClass> {
127 private:
128 Symbol* _module_name;
129 // First and last entries of class path entries for a specific module
130 ClassPathEntry* _module_first_entry;
131 ClassPathEntry* _module_last_entry;
132 public:
133 Symbol* module_name() const { return _module_name; }
134 ClassPathEntry* module_first_entry() const { return _module_first_entry; }
135 ModuleClassPathList(Symbol* module_name);
136 ~ModuleClassPathList();
137 void add_to_list(ClassPathEntry* new_entry);
138 };
139
140 class ClassLoader: AllStatic {
141 public:
142 enum ClassLoaderType {
143 OTHER = 0,
144 BOOT_LOADER = 1, /* boot loader */
145 PLATFORM_LOADER = 2, /* PlatformClassLoader */
146 APP_LOADER = 3 /* AppClassLoader */
147 };
148 protected:
149
150 // Performance counters
151 static PerfCounter* _perf_accumulated_time;
152 static PerfCounter* _perf_classes_inited;
153 static PerfCounter* _perf_class_init_time;
154 static PerfCounter* _perf_class_init_selftime;
155 static PerfCounter* _perf_class_init_bytecodes_count;
156 static PerfCounter* _perf_classes_verified;
157 static PerfCounter* _perf_class_verify_time;
158 static PerfCounter* _perf_class_verify_selftime;
159 static PerfCounter* _perf_classes_linked;
160 static PerfCounter* _perf_class_link_time;
161 static PerfCounter* _perf_class_link_selftime;
162 static PerfCounter* _perf_shared_classload_time;
163 static PerfCounter* _perf_sys_classload_time;
164 static PerfCounter* _perf_app_classload_time;
165 static PerfCounter* _perf_app_classload_selftime;
166 static PerfCounter* _perf_app_classload_count;
167 static PerfCounter* _perf_define_appclasses;
168 static PerfCounter* _perf_define_appclass_time;
169 static PerfCounter* _perf_define_appclass_selftime;
170 static PerfCounter* _perf_app_classfile_bytes_read;
171 static PerfCounter* _perf_sys_classfile_bytes_read;
172 static PerfCounter* _perf_preload_total_time;
173 static PerfCounter* _perf_preload_time;
174 static PerfCounter* _perf_prelink_time;
175 static PerfCounter* _perf_preinit_time;
176 static PerfCounter* _perf_preresolve_time;
177 static PerfCounter* _perf_ik_link_methods_time;
178 static PerfCounter* _perf_method_adapters_time;
179 static PerfCounter* _perf_ik_link_methods_count;
180 static PerfCounter* _perf_method_adapters_count;
181
182 static PerfTickCounters* _perf_resolve_indy_time;
183 static PerfTickCounters* _perf_resolve_invokehandle_time;
184 static PerfTickCounters* _perf_resolve_mh_time;
185 static PerfTickCounters* _perf_resolve_mt_time;
186
187 static PerfCounter* _perf_resolve_indy_count;
188 static PerfCounter* _perf_resolve_invokehandle_count;
189 static PerfCounter* _perf_resolve_mh_count;
190 static PerfCounter* _perf_resolve_mt_count;
191
192 static PerfCounter* _unsafe_defineClassCallCounter;
193
194 // Count the time taken to hash the scondary superclass arrays.
195 static PerfCounter* _perf_secondary_hash_time;
196
197 // The boot class path consists of 3 ordered pieces:
198 // 1. the module/path pairs specified to --patch-module
199 // --patch-module=<module>=<file>(<pathsep><file>)*
200 // 2. the base piece
201 // [jimage | build with exploded modules]
202 // 3. boot loader append path
203 // [-Xbootclasspath/a]; [jvmti appended entries]
204 //
205 // The boot loader must obey this order when attempting
206 // to load a class.
207
208 // 1. Contains the module/path pairs specified to --patch-module
209 static GrowableArray<ModuleClassPathList*>* _patch_mod_entries;
210
290 static PerfCounter* perf_classes_verified() { return _perf_classes_verified; }
291 static PerfCounter* perf_class_verify_time() { return _perf_class_verify_time; }
292 static PerfCounter* perf_class_verify_selftime() { return _perf_class_verify_selftime; }
293 static PerfCounter* perf_classes_linked() { return _perf_classes_linked; }
294 static PerfCounter* perf_class_link_time() { return _perf_class_link_time; }
295 static PerfCounter* perf_class_link_selftime() { return _perf_class_link_selftime; }
296 static PerfCounter* perf_shared_classload_time() { return _perf_shared_classload_time; }
297 static PerfCounter* perf_secondary_hash_time() {
298 return _perf_secondary_hash_time;
299 }
300 static PerfCounter* perf_sys_classload_time() { return _perf_sys_classload_time; }
301 static PerfCounter* perf_app_classload_time() { return _perf_app_classload_time; }
302 static PerfCounter* perf_app_classload_selftime() { return _perf_app_classload_selftime; }
303 static PerfCounter* perf_app_classload_count() { return _perf_app_classload_count; }
304 static PerfCounter* perf_define_appclasses() { return _perf_define_appclasses; }
305 static PerfCounter* perf_define_appclass_time() { return _perf_define_appclass_time; }
306 static PerfCounter* perf_define_appclass_selftime() { return _perf_define_appclass_selftime; }
307 static PerfCounter* perf_app_classfile_bytes_read() { return _perf_app_classfile_bytes_read; }
308 static PerfCounter* perf_sys_classfile_bytes_read() { return _perf_sys_classfile_bytes_read; }
309
310 static PerfCounter* perf_preload_total_time() { return _perf_preload_total_time; }
311 static PerfCounter* perf_preload_time() { return _perf_preload_time; }
312 static PerfCounter* perf_prelink_time() { return _perf_prelink_time; }
313 static PerfCounter* perf_preinit_time() { return _perf_preinit_time; }
314 static PerfCounter* perf_preresolve_time() { return _perf_preresolve_time; }
315 static PerfCounter* perf_ik_link_methods_time() { return _perf_ik_link_methods_time; }
316 static PerfCounter* perf_method_adapters_time() { return _perf_method_adapters_time; }
317 static PerfCounter* perf_ik_link_methods_count() { return _perf_ik_link_methods_count; }
318 static PerfCounter* perf_method_adapters_count() { return _perf_method_adapters_count; }
319
320 static PerfTickCounters* perf_resolve_invokedynamic_time() { return _perf_resolve_indy_time; }
321 static PerfTickCounters* perf_resolve_invokehandle_time() { return _perf_resolve_invokehandle_time; }
322 static PerfTickCounters* perf_resolve_method_handle_time() { return _perf_resolve_mh_time; }
323 static PerfTickCounters* perf_resolve_method_type_time() { return _perf_resolve_mt_time; }
324
325 static PerfCounter* perf_resolve_invokedynamic_count() { return _perf_resolve_indy_count; }
326 static PerfCounter* perf_resolve_invokehandle_count() { return _perf_resolve_invokehandle_count; }
327 static PerfCounter* perf_resolve_method_handle_count() { return _perf_resolve_mh_count; }
328 static PerfCounter* perf_resolve_method_type_count() { return _perf_resolve_mt_count; }
329
330 static PerfCounter* perf_class_init_bytecodes_count() { return _perf_class_init_bytecodes_count; }
331
332 static void print_counters();
333
334 // Record how many calls to Unsafe_DefineClass
335 static PerfCounter* unsafe_defineClassCallCounter() {
336 return _unsafe_defineClassCallCounter;
337 }
338
339 // Modular java runtime image is present vs. a build with exploded modules
340 static bool has_jrt_entry() { return (_jrt_entry != nullptr); }
341 static ClassPathEntry* get_jrt_entry() { return _jrt_entry; }
342 static void close_jrt_image();
343
344 // Add a module's exploded directory to the boot loader's exploded module build list
345 static void add_to_exploded_build_list(JavaThread* current, Symbol* module_name);
346
347 // Search the module list for the class file stream based on the file name and java package
348 static ClassFileStream* search_module_entries(JavaThread* current,
349 const GrowableArray<ModuleClassPathList*>* const module_list,
350 PackageEntry* pkg_entry, // Java package entry derived from the class name
351 const char* const file_name);
352
353 // Load individual .class file
403
404 static char* lookup_vm_options();
405
406 // Determines if the named module is present in the
407 // modules jimage file or in the exploded modules directory.
408 static bool is_module_observable(const char* module_name);
409
410 static JImageLocationRef jimage_find_resource(JImageFile* jf, const char* module_name,
411 const char* file_name, jlong &size);
412
413 static void trace_class_path(const char* msg, const char* name = nullptr);
414
415 // VM monitoring and management support
416 static jlong classloader_time_ms();
417 static jlong class_method_total_size();
418 static jlong class_init_count();
419 static jlong class_init_time_ms();
420 static jlong class_verify_time_ms();
421 static jlong class_link_count();
422 static jlong class_link_time_ms();
423 static jlong class_init_bytecodes_count();
424
425 // adds a class path to the boot append entries
426 static void add_to_boot_append_entries(ClassPathEntry* new_entry);
427
428 // creates a class path zip entry (returns null if JAR file cannot be opened)
429 static ClassPathZipEntry* create_class_path_zip_entry(const char *apath);
430
431 static bool string_ends_with(const char* str, const char* str_to_find);
432
433 // Extract package name from a fully qualified class name
434 // *bad_class_name is set to true if there's a problem with parsing class_name, to
435 // distinguish from a class_name with no package name, as both cases have a null return value
436 static Symbol* package_from_class_name(const Symbol* class_name, bool* bad_class_name = nullptr);
437
438 // Debugging
439 static void verify() PRODUCT_RETURN;
440 };
441
442 // PerfClassTraceTime is used to measure time for class loading related events.
443 // This class tracks cumulative time and exclusive time for specific event types.
444 // During the execution of one event, other event types (e.g. class loading and
445 // resolution) as well as recursive calls of the same event type could happen.
446 // Only one elapsed timer (cumulative) and one thread-local self timer (exclusive)
447 // (i.e. only one event type) are active at a time even multiple PerfClassTraceTime
448 // instances have been created as multiple events are happening.
449 class PerfClassTraceTime {
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