0N/A

1879N/A#ifndef SHARE_VM_CLASSFILE_CLASSLOADER_HPP

1879N/A#define SHARE_VM_CLASSFILE_CLASSLOADER_HPP

1879N/A

1879N/A#include "classfile/classFileParser.hpp"

1879N/A#include "runtime/perfData.hpp"

1879N/A

0N/A#include <sys/stat.h>

0N/A

0N/A

3863N/Aclass MetaIndex: public CHeapObj<mtClass> {

0N/A private:

0N/A char** _meta_package_names;

0N/A int _num_meta_package_names;

0N/A public:

0N/A MetaIndex(char** meta_package_names, int num_meta_package_names);

0N/A ~MetaIndex();

0N/A bool may_contain(const char* class_name);

0N/A};

0N/A

0N/A

0N/A

3863N/Aclass ClassPathEntry: public CHeapObj<mtClass> {

0N/A private:

0N/A ClassPathEntry* _next;

0N/A public:

0N/A // Next entry in class path

0N/A ClassPathEntry* next() { return _next; }

0N/A void set_next(ClassPathEntry* next) {

0N/A // may have unlocked readers, so write atomically.

0N/A OrderAccess::release_store_ptr(&_next, next);

0N/A }

0N/A virtual bool is_jar_file() = 0;

0N/A virtual const char* name() = 0;

0N/A virtual bool is_lazy();

0N/A // Constructor

0N/A ClassPathEntry();

0N/A // Attempt to locate file_name through this class path entry.

0N/A // Returns a class file parsing stream if successfull.

0N/A virtual ClassFileStream* open_stream(const char* name) = 0;

0N/A // Debugging

0N/A NOT_PRODUCT(virtual void compile_the_world(Handle loader, TRAPS) = 0;)

0N/A NOT_PRODUCT(virtual bool is_rt_jar() = 0;)

0N/A};

0N/A

0N/A

0N/Aclass ClassPathDirEntry: public ClassPathEntry {

0N/A private:

0N/A char* _dir; // Name of directory

0N/A public:

0N/A bool is_jar_file() { return false; }

0N/A const char* name() { return _dir; }

0N/A ClassPathDirEntry(char* dir);

0N/A ClassFileStream* open_stream(const char* name);

0N/A // Debugging

0N/A NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);)

0N/A NOT_PRODUCT(bool is_rt_jar();)

0N/A};

0N/A

0N/A

0N/Atypedef void* jzfile;

0N/Atypedef struct {

0N/A char *name; /* entry name */

0N/A jlong time; /* modification time */

0N/A jlong size; /* size of uncompressed data */

0N/A jlong csize; /* size of compressed data (zero if uncompressed) */

0N/A jint crc; /* crc of uncompressed data */

0N/A char *comment; /* optional zip file comment */

0N/A jbyte *extra; /* optional extra data */

0N/A jlong pos; /* position of LOC header (if negative) or data */

0N/A} jzentry;

0N/A

0N/A

0N/Aclass ClassPathZipEntry: public ClassPathEntry {

0N/A private:

0N/A jzfile* _zip; // The zip archive

0N/A char* _zip_name; // Name of zip archive

0N/A public:

0N/A bool is_jar_file() { return true; }

0N/A const char* name() { return _zip_name; }

0N/A ClassPathZipEntry(jzfile* zip, const char* zip_name);

0N/A ~ClassPathZipEntry();

0N/A ClassFileStream* open_stream(const char* name);

0N/A void contents_do(void f(const char* name, void* context), void* context);

0N/A // Debugging

0N/A NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);)

0N/A NOT_PRODUCT(void compile_the_world12(Handle loader, TRAPS);) // JDK 1.2 version

0N/A NOT_PRODUCT(void compile_the_world13(Handle loader, TRAPS);) // JDK 1.3 version

0N/A NOT_PRODUCT(bool is_rt_jar();)

0N/A NOT_PRODUCT(bool is_rt_jar12();)

0N/A NOT_PRODUCT(bool is_rt_jar13();)

0N/A};

0N/A

0N/A

0N/Aclass LazyClassPathEntry: public ClassPathEntry {

0N/A private:

0N/A char* _path; // dir or file

0N/A struct stat _st;

0N/A MetaIndex* _meta_index;

0N/A volatile ClassPathEntry* _resolved_entry;

0N/A ClassPathEntry* resolve_entry();

0N/A public:

0N/A bool is_jar_file();

0N/A const char* name() { return _path; }

0N/A LazyClassPathEntry(char* path, struct stat st);

0N/A ClassFileStream* open_stream(const char* name);

0N/A void set_meta_index(MetaIndex* meta_index) { _meta_index = meta_index; }

0N/A virtual bool is_lazy();

0N/A // Debugging

0N/A NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);)

0N/A NOT_PRODUCT(bool is_rt_jar();)

0N/A};

0N/A

0N/Aclass PackageHashtable;

0N/Aclass PackageInfo;

3863N/Atemplate <MEMFLAGS F> class HashtableBucket;

0N/A

0N/Aclass ClassLoader: AllStatic {

0N/A public:

0N/A enum SomeConstants {

0N/A package_hash_table_size = 31 // Number of buckets

0N/A };

0N/A private:

0N/A friend class LazyClassPathEntry;

0N/A

0N/A // Performance counters

0N/A static PerfCounter* _perf_accumulated_time;

0N/A static PerfCounter* _perf_classes_inited;

0N/A static PerfCounter* _perf_class_init_time;

875N/A static PerfCounter* _perf_class_init_selftime;

875N/A static PerfCounter* _perf_classes_verified;

0N/A static PerfCounter* _perf_class_verify_time;

875N/A static PerfCounter* _perf_class_verify_selftime;

0N/A static PerfCounter* _perf_classes_linked;

0N/A static PerfCounter* _perf_class_link_time;

875N/A static PerfCounter* _perf_class_link_selftime;

875N/A static PerfCounter* _perf_class_parse_time;

875N/A static PerfCounter* _perf_class_parse_selftime;

875N/A static PerfCounter* _perf_sys_class_lookup_time;

875N/A static PerfCounter* _perf_shared_classload_time;

875N/A static PerfCounter* _perf_sys_classload_time;

875N/A static PerfCounter* _perf_app_classload_time;

875N/A static PerfCounter* _perf_app_classload_selftime;

875N/A static PerfCounter* _perf_app_classload_count;

875N/A static PerfCounter* _perf_define_appclasses;

875N/A static PerfCounter* _perf_define_appclass_time;

875N/A static PerfCounter* _perf_define_appclass_selftime;

875N/A static PerfCounter* _perf_app_classfile_bytes_read;

875N/A static PerfCounter* _perf_sys_classfile_bytes_read;

0N/A

0N/A static PerfCounter* _sync_systemLoaderLockContentionRate;

0N/A static PerfCounter* _sync_nonSystemLoaderLockContentionRate;

0N/A static PerfCounter* _sync_JVMFindLoadedClassLockFreeCounter;

0N/A static PerfCounter* _sync_JVMDefineClassLockFreeCounter;

0N/A static PerfCounter* _sync_JNIDefineClassLockFreeCounter;

0N/A

0N/A static PerfCounter* _unsafe_defineClassCallCounter;

0N/A static PerfCounter* _isUnsyncloadClass;

0N/A static PerfCounter* _load_instance_class_failCounter;

0N/A

0N/A // First entry in linked list of ClassPathEntry instances

0N/A static ClassPathEntry* _first_entry;

0N/A // Last entry in linked list of ClassPathEntry instances

0N/A static ClassPathEntry* _last_entry;

0N/A // Hash table used to keep track of loaded packages

0N/A static PackageHashtable* _package_hash_table;

0N/A static const char* _shared_archive;

0N/A

0N/A // Hash function

0N/A static unsigned int hash(const char *s, int n);

0N/A // Returns the package file name corresponding to the specified package

0N/A // or class name, or null if not found.

0N/A static PackageInfo* lookup_package(const char *pkgname);

0N/A // Adds a new package entry for the specified class or package name and

0N/A // corresponding directory or jar file name.

0N/A static bool add_package(const char *pkgname, int classpath_index, TRAPS);

0N/A

0N/A // Initialization

0N/A static void setup_meta_index();

0N/A static void setup_bootstrap_search_path();

0N/A static void load_zip_library();

0N/A static void create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy);

0N/A

0N/A // Canonicalizes path names, so strcmp will work properly. This is mainly

0N/A // to avoid confusing the zip library

0N/A static bool get_canonical_path(char* orig, char* out, int len);

0N/A public:

0N/A // Used by the kernel jvm.

0N/A static void update_class_path_entry_list(const char *path,

0N/A bool check_for_duplicates);

0N/A static void print_bootclasspath();

0N/A

0N/A // Timing

875N/A static PerfCounter* perf_accumulated_time() { return _perf_accumulated_time; }

875N/A static PerfCounter* perf_classes_inited() { return _perf_classes_inited; }

875N/A static PerfCounter* perf_class_init_time() { return _perf_class_init_time; }

875N/A static PerfCounter* perf_class_init_selftime() { return _perf_class_init_selftime; }

875N/A static PerfCounter* perf_classes_verified() { return _perf_classes_verified; }

875N/A static PerfCounter* perf_class_verify_time() { return _perf_class_verify_time; }

875N/A static PerfCounter* perf_class_verify_selftime() { return _perf_class_verify_selftime; }

875N/A static PerfCounter* perf_classes_linked() { return _perf_classes_linked; }

875N/A static PerfCounter* perf_class_link_time() { return _perf_class_link_time; }

875N/A static PerfCounter* perf_class_link_selftime() { return _perf_class_link_selftime; }

875N/A static PerfCounter* perf_class_parse_time() { return _perf_class_parse_time; }

875N/A static PerfCounter* perf_class_parse_selftime() { return _perf_class_parse_selftime; }

875N/A static PerfCounter* perf_sys_class_lookup_time() { return _perf_sys_class_lookup_time; }

875N/A static PerfCounter* perf_shared_classload_time() { return _perf_shared_classload_time; }

875N/A static PerfCounter* perf_sys_classload_time() { return _perf_sys_classload_time; }

875N/A static PerfCounter* perf_app_classload_time() { return _perf_app_classload_time; }

875N/A static PerfCounter* perf_app_classload_selftime() { return _perf_app_classload_selftime; }

875N/A static PerfCounter* perf_app_classload_count() { return _perf_app_classload_count; }

875N/A static PerfCounter* perf_define_appclasses() { return _perf_define_appclasses; }

875N/A static PerfCounter* perf_define_appclass_time() { return _perf_define_appclass_time; }

875N/A static PerfCounter* perf_define_appclass_selftime() { return _perf_define_appclass_selftime; }

875N/A static PerfCounter* perf_app_classfile_bytes_read() { return _perf_app_classfile_bytes_read; }

875N/A static PerfCounter* perf_sys_classfile_bytes_read() { return _perf_sys_classfile_bytes_read; }

0N/A

0N/A // Record how often system loader lock object is contended

0N/A static PerfCounter* sync_systemLoaderLockContentionRate() {

0N/A return _sync_systemLoaderLockContentionRate;

0N/A }

0N/A

0N/A // Record how often non system loader lock object is contended

0N/A static PerfCounter* sync_nonSystemLoaderLockContentionRate() {

0N/A return _sync_nonSystemLoaderLockContentionRate;

0N/A }

0N/A

0N/A // Record how many calls to JVM_FindLoadedClass w/o holding a lock

0N/A static PerfCounter* sync_JVMFindLoadedClassLockFreeCounter() {

0N/A return _sync_JVMFindLoadedClassLockFreeCounter;

0N/A }

0N/A

0N/A // Record how many calls to JVM_DefineClass w/o holding a lock

0N/A static PerfCounter* sync_JVMDefineClassLockFreeCounter() {

0N/A return _sync_JVMDefineClassLockFreeCounter;

0N/A }

0N/A

0N/A // Record how many calls to jni_DefineClass w/o holding a lock

0N/A static PerfCounter* sync_JNIDefineClassLockFreeCounter() {

0N/A return _sync_JNIDefineClassLockFreeCounter;

0N/A }

0N/A

0N/A // Record how many calls to Unsafe_DefineClass

0N/A static PerfCounter* unsafe_defineClassCallCounter() {

0N/A return _unsafe_defineClassCallCounter;

0N/A }

0N/A

0N/A // Record how many times SystemDictionary::load_instance_class call

0N/A // fails with linkageError when Unsyncloadclass flag is set.

0N/A static PerfCounter* load_instance_class_failCounter() {

0N/A return _load_instance_class_failCounter;

0N/A }

0N/A

0N/A // Load individual .class file

2062N/A static instanceKlassHandle load_classfile(Symbol* h_name, TRAPS);

0N/A

0N/A // If the specified package has been loaded by the system, then returns

0N/A // the name of the directory or ZIP file that the package was loaded from.

0N/A // Returns null if the package was not loaded.

0N/A // Note: The specified name can either be the name of a class or package.

0N/A // If a package name is specified, then it must be "/"-separator and also

0N/A // end with a trailing "/".

0N/A static oop get_system_package(const char* name, TRAPS);

0N/A

0N/A // Returns an array of Java strings representing all of the currently

0N/A // loaded system packages.

0N/A // Note: The package names returned are "/"-separated and end with a

0N/A // trailing "/".

0N/A static objArrayOop get_system_packages(TRAPS);

0N/A

0N/A // Initialization

0N/A static void initialize();

0N/A static void create_package_info_table();

3863N/A static void create_package_info_table(HashtableBucket<mtClass> *t, int length,

0N/A int number_of_entries);

0N/A static int compute_Object_vtable();

0N/A

0N/A static ClassPathEntry* classpath_entry(int n) {

0N/A ClassPathEntry* e = ClassLoader::_first_entry;

0N/A while (--n >= 0) {

0N/A assert(e != NULL, "Not that many classpath entries.");

0N/A e = e->next();

0N/A }

0N/A return e;

0N/A }

0N/A

0N/A // Sharing dump and restore

0N/A static void copy_package_info_buckets(char** top, char* end);

0N/A static void copy_package_info_table(char** top, char* end);

0N/A

0N/A // VM monitoring and management support

0N/A static jlong classloader_time_ms();

0N/A static jlong class_method_total_size();

0N/A static jlong class_init_count();

0N/A static jlong class_init_time_ms();

0N/A static jlong class_verify_time_ms();

0N/A static jlong class_link_count();

0N/A static jlong class_link_time_ms();

0N/A

0N/A // indicates if class path already contains a entry (exact match by name)

0N/A static bool contains_entry(ClassPathEntry* entry);

0N/A

0N/A // adds a class path list

0N/A static void add_to_list(ClassPathEntry* new_entry);

0N/A

0N/A // creates a class path zip entry (returns NULL if JAR file cannot be opened)

0N/A static ClassPathZipEntry* create_class_path_zip_entry(const char *apath);

0N/A

0N/A // Debugging

0N/A static void verify() PRODUCT_RETURN;

0N/A

0N/A // Force compilation of all methods in all classes in bootstrap class path (stress test)

0N/A#ifndef PRODUCT

0N/A private:

0N/A static int _compile_the_world_counter;

0N/A public:

0N/A static void compile_the_world();

0N/A static void compile_the_world_in(char* name, Handle loader, TRAPS);

0N/A static int compile_the_world_counter() { return _compile_the_world_counter; }

0N/A#endif //PRODUCT

0N/A};

875N/A

875N/Aclass PerfClassTraceTime {

2024N/A public:

2024N/A enum {

2024N/A CLASS_LOAD = 0,

2024N/A PARSE_CLASS = 1,

2024N/A CLASS_LINK = 2,

2024N/A CLASS_VERIFY = 3,

2024N/A CLASS_CLINIT = 4,

2024N/A DEFINE_CLASS = 5,

2024N/A EVENT_TYPE_COUNT = 6

2024N/A };

2024N/A protected:

2024N/A // _t tracks time from initialization to destruction of this timer instance

2024N/A // including time for all other event types, and recursive calls of this type.

2024N/A // When a timer is called recursively, the elapsedTimer _t would not be used.

2024N/A elapsedTimer _t;

2024N/A PerfLongCounter* _timep;

2024N/A PerfLongCounter* _selftimep;

2024N/A PerfLongCounter* _eventp;

2024N/A // pointer to thread-local recursion counter and timer array

2024N/A // The thread_local timers track cumulative time for specific event types

2024N/A // exclusive of time for other event types, but including recursive calls

2024N/A // of the same type.

2024N/A int* _recursion_counters;

2024N/A elapsedTimer* _timers;

2024N/A int _event_type;

2024N/A int _prev_active_event;

875N/A

2024N/A public:

875N/A

2024N/A inline PerfClassTraceTime(PerfLongCounter* timep, /* counter incremented with inclusive time */

2024N/A PerfLongCounter* selftimep, /* counter incremented with exclusive time */

2024N/A PerfLongCounter* eventp, /* event counter */

2024N/A int* recursion_counters, /* thread-local recursion counter array */

2024N/A elapsedTimer* timers, /* thread-local timer array */

2024N/A int type /* event type */ ) :

2024N/A _timep(timep), _selftimep(selftimep), _eventp(eventp), _recursion_counters(recursion_counters), _timers(timers), _event_type(type) {

2024N/A initialize();

2024N/A }

875N/A

2024N/A inline PerfClassTraceTime(PerfLongCounter* timep, /* counter incremented with inclusive time */

2024N/A elapsedTimer* timers, /* thread-local timer array */

2024N/A int type /* event type */ ) :

2024N/A _timep(timep), _selftimep(NULL), _eventp(NULL), _recursion_counters(NULL), _timers(timers), _event_type(type) {

2024N/A initialize();

2024N/A }

875N/A

2024N/A inline void suspend() { _t.stop(); _timers[_event_type].stop(); }

2024N/A inline void resume() { _t.start(); _timers[_event_type].start(); }

875N/A

2024N/A ~PerfClassTraceTime();

2024N/A void initialize();

875N/A};

875N/A

1879N/A#endif // SHARE_VM_CLASSFILE_CLASSLOADER_HPP