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comparison src/share/vm/classfile/classLoader.hpp @ 20375:6e0cb14ce59b

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8046070: Class Data Sharing clean up and refactoring Summary: Cleaned up CDS to be more configurable, maintainable and extensible Reviewed-by: dholmes, coleenp, acorn, mchung
author iklam
date Thu, 21 Aug 2014 13:57:51 -0700
parents 7e7dd25666da
children bb239308be67
comparison
equal deleted inserted replaced
20374:999824269b71 20375:6e0cb14ce59b
105 public: 105 public:
106 bool is_jar_file() { return true; } 106 bool is_jar_file() { return true; }
107 const char* name() { return _zip_name; } 107 const char* name() { return _zip_name; }
108 ClassPathZipEntry(jzfile* zip, const char* zip_name); 108 ClassPathZipEntry(jzfile* zip, const char* zip_name);
109 ~ClassPathZipEntry(); 109 ~ClassPathZipEntry();
110 u1* open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS);
110 ClassFileStream* open_stream(const char* name, TRAPS); 111 ClassFileStream* open_stream(const char* name, TRAPS);
111 void contents_do(void f(const char* name, void* context), void* context); 112 void contents_do(void f(const char* name, void* context), void* context);
112 // Debugging 113 // Debugging
113 NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);) 114 NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);)
114 NOT_PRODUCT(void compile_the_world12(Handle loader, TRAPS);) // JDK 1.2 version 115 NOT_PRODUCT(void compile_the_world12(Handle loader, TRAPS);) // JDK 1.2 version
124 private: 125 private:
125 char* _path; // dir or file 126 char* _path; // dir or file
126 struct stat _st; 127 struct stat _st;
127 MetaIndex* _meta_index; 128 MetaIndex* _meta_index;
128 bool _has_error; 129 bool _has_error;
130 bool _throw_exception;
129 volatile ClassPathEntry* _resolved_entry; 131 volatile ClassPathEntry* _resolved_entry;
130 ClassPathEntry* resolve_entry(TRAPS); 132 ClassPathEntry* resolve_entry(TRAPS);
131 public: 133 public:
132 bool is_jar_file(); 134 bool is_jar_file();
133 const char* name() { return _path; } 135 const char* name() { return _path; }
134 LazyClassPathEntry(char* path, const struct stat* st); 136 LazyClassPathEntry(char* path, const struct stat* st, bool throw_exception);
137 u1* open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS);
135 ClassFileStream* open_stream(const char* name, TRAPS); 138 ClassFileStream* open_stream(const char* name, TRAPS);
136 void set_meta_index(MetaIndex* meta_index) { _meta_index = meta_index; } 139 void set_meta_index(MetaIndex* meta_index) { _meta_index = meta_index; }
137 virtual bool is_lazy(); 140 virtual bool is_lazy();
138 // Debugging 141 // Debugging
139 NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);) 142 NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);)
140 NOT_PRODUCT(bool is_rt_jar();) 143 NOT_PRODUCT(bool is_rt_jar();)
141 }; 144 };
142 145
143 class PackageHashtable; 146 class PackageHashtable;
144 class PackageInfo; 147 class PackageInfo;
148 class SharedPathsMiscInfo;
145 template <MEMFLAGS F> class HashtableBucket; 149 template <MEMFLAGS F> class HashtableBucket;
146 150
147 class ClassLoader: AllStatic { 151 class ClassLoader: AllStatic {
148 public: 152 public:
149 enum SomeConstants { 153 enum SomeConstants {
150 package_hash_table_size = 31 // Number of buckets 154 package_hash_table_size = 31 // Number of buckets
151 }; 155 };
152 private: 156 protected:
153 friend class LazyClassPathEntry; 157 friend class LazyClassPathEntry;
154 158
155 // Performance counters 159 // Performance counters
156 static PerfCounter* _perf_accumulated_time; 160 static PerfCounter* _perf_accumulated_time;
157 static PerfCounter* _perf_classes_inited; 161 static PerfCounter* _perf_classes_inited;
189 193
190 // First entry in linked list of ClassPathEntry instances 194 // First entry in linked list of ClassPathEntry instances
191 static ClassPathEntry* _first_entry; 195 static ClassPathEntry* _first_entry;
192 // Last entry in linked list of ClassPathEntry instances 196 // Last entry in linked list of ClassPathEntry instances
193 static ClassPathEntry* _last_entry; 197 static ClassPathEntry* _last_entry;
198 static int _num_entries;
199
194 // Hash table used to keep track of loaded packages 200 // Hash table used to keep track of loaded packages
195 static PackageHashtable* _package_hash_table; 201 static PackageHashtable* _package_hash_table;
196 static const char* _shared_archive; 202 static const char* _shared_archive;
203
204 // Info used by CDS
205 CDS_ONLY(static SharedPathsMiscInfo * _shared_paths_misc_info;)
197 206
198 // Hash function 207 // Hash function
199 static unsigned int hash(const char *s, int n); 208 static unsigned int hash(const char *s, int n);
200 // Returns the package file name corresponding to the specified package 209 // Returns the package file name corresponding to the specified package
201 // or class name, or null if not found. 210 // or class name, or null if not found.
203 // Adds a new package entry for the specified class or package name and 212 // Adds a new package entry for the specified class or package name and
204 // corresponding directory or jar file name. 213 // corresponding directory or jar file name.
205 static bool add_package(const char *pkgname, int classpath_index, TRAPS); 214 static bool add_package(const char *pkgname, int classpath_index, TRAPS);
206 215
207 // Initialization 216 // Initialization
208 static void setup_meta_index(); 217 static void setup_bootstrap_meta_index();
218 static void setup_meta_index(const char* meta_index_path, const char* meta_index_dir,
219 int start_index);
209 static void setup_bootstrap_search_path(); 220 static void setup_bootstrap_search_path();
221 static void setup_search_path(char *class_path);
222
210 static void load_zip_library(); 223 static void load_zip_library();
211 static ClassPathEntry* create_class_path_entry(char *path, const struct stat* st, 224 static ClassPathEntry* create_class_path_entry(char *path, const struct stat* st,
212 bool lazy, TRAPS); 225 bool lazy, bool throw_exception, TRAPS);
213 226
214 // Canonicalizes path names, so strcmp will work properly. This is mainly 227 // Canonicalizes path names, so strcmp will work properly. This is mainly
215 // to avoid confusing the zip library 228 // to avoid confusing the zip library
216 static bool get_canonical_path(char* orig, char* out, int len); 229 static bool get_canonical_path(char* orig, char* out, int len);
217 public: 230 public:
218 // Used by the kernel jvm. 231 static bool update_class_path_entry_list(char *path,
219 static void update_class_path_entry_list(char *path, 232 bool check_for_duplicates,
220 bool check_for_duplicates); 233 bool throw_exception=true);
221 static void print_bootclasspath(); 234 static void print_bootclasspath();
222 235
223 // Timing 236 // Timing
224 static PerfCounter* perf_accumulated_time() { return _perf_accumulated_time; } 237 static PerfCounter* perf_accumulated_time() { return _perf_accumulated_time; }
225 static PerfCounter* perf_classes_inited() { return _perf_classes_inited; } 238 static PerfCounter* perf_classes_inited() { return _perf_classes_inited; }
298 // trailing "/". 311 // trailing "/".
299 static objArrayOop get_system_packages(TRAPS); 312 static objArrayOop get_system_packages(TRAPS);
300 313
301 // Initialization 314 // Initialization
302 static void initialize(); 315 static void initialize();
316 CDS_ONLY(static void initialize_shared_path();)
303 static void create_package_info_table(); 317 static void create_package_info_table();
304 static void create_package_info_table(HashtableBucket<mtClass> *t, int length, 318 static void create_package_info_table(HashtableBucket<mtClass> *t, int length,
305 int number_of_entries); 319 int number_of_entries);
306 static int compute_Object_vtable(); 320 static int compute_Object_vtable();
307 321
312 e = e->next(); 326 e = e->next();
313 } 327 }
314 return e; 328 return e;
315 } 329 }
316 330
331 #if INCLUDE_CDS
317 // Sharing dump and restore 332 // Sharing dump and restore
318 static void copy_package_info_buckets(char** top, char* end); 333 static void copy_package_info_buckets(char** top, char* end);
319 static void copy_package_info_table(char** top, char* end); 334 static void copy_package_info_table(char** top, char* end);
335
336 static void check_shared_classpath(const char *path);
337 static void finalize_shared_paths_misc_info();
338 static int get_shared_paths_misc_info_size();
339 static void* get_shared_paths_misc_info();
340 static bool check_shared_paths_misc_info(void* info, int size);
341 static void exit_with_path_failure(const char* error, const char* message);
342 #endif
343
344 static void trace_class_path(const char* msg, const char* name = NULL);
320 345
321 // VM monitoring and management support 346 // VM monitoring and management support
322 static jlong classloader_time_ms(); 347 static jlong classloader_time_ms();
323 static jlong class_method_total_size(); 348 static jlong class_method_total_size();
324 static jlong class_init_count(); 349 static jlong class_init_count();
339 // Debugging 364 // Debugging
340 static void verify() PRODUCT_RETURN; 365 static void verify() PRODUCT_RETURN;
341 366
342 // Force compilation of all methods in all classes in bootstrap class path (stress test) 367 // Force compilation of all methods in all classes in bootstrap class path (stress test)
343 #ifndef PRODUCT 368 #ifndef PRODUCT
344 private: 369 protected:
345 static int _compile_the_world_class_counter; 370 static int _compile_the_world_class_counter;
346 static int _compile_the_world_method_counter; 371 static int _compile_the_world_method_counter;
347 public: 372 public:
348 static void compile_the_world(); 373 static void compile_the_world();
349 static void compile_the_world_in(char* name, Handle loader, TRAPS); 374 static void compile_the_world_in(char* name, Handle loader, TRAPS);