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8142968: Module System implementation

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Initial integration of JEP 200, JEP 260, JEP 261, and JEP 282

Co-authored-by: Alex Buckley <alex.buckley@oracle.com>
Co-authored-by: Jonathan Gibbons <jonathan.gibbons@oracle.com>
Co-authored-by: Karen Kinnear <karen.kinnear@oracle.com>
Co-authored-by: Mandy Chung <mandy.chung@oracle.com>
Co-authored-by: Mark Reinhold <mark.reinhold@oracle.com>
Co-authored-by: Harold Seigel <harold.seigel@oracle.com>
Co-authored-by: Lois Foltan <lois.foltan@oracle.com>
Co-authored-by: Calvin Cheung <calvin.cheung@oracle.com>
Co-authored-by: Christian Tornqvist <christian.tornqvist@oracle.com>
Co-authored-by: Erik Joelsson <erik.joelsson@oracle.com>
Co-authored-by: George Triantafillou <george.triantafillou@oracle.com>
Co-authored-by: Igor Ignatyev <igor.ignatyev@oracle.com>
Co-authored-by: Ioi Lam <ioi.lam@oracle.com>
Co-authored-by: James Laskey <james.laskey@oracle.com>
Co-authored-by: Jean-Francois Denise <jean-francois.denise@oracle.com>
Co-authored-by: Jiangli Zhou <jiangli.zhou@oracle.com>
Co-authored-by: Markus Gronlund <markus.gronlund@oracle.com>
Co-authored-by: Serguei Spitsyn <serguei.spitsyn@oracle.com>
Co-authored-by: Staffan Larsen <staffan.larsen@oracle.com>
Co-authored-by: Sundararajan Athijegannathan <sundararajan.athijegannathan@oracle.com>
Reviewed-by: acorn, ccheung, coleenp, ctornqvi, dholmes, dsimms, gtriantafill, iklam, jiangli, mgronlun, mseledtsov, cjplummer, sspitsyn, stefank, twisti, hseigel, lfoltan, alanb, mchung, dfazunen
This commit is contained in:
Alan Bateman 2016-03-17 19:04:01 +00:00
parent 007b0fa3db
commit f30fc1c88b
297 changed files with 15848 additions and 2302 deletions
Download patch file Download diff file Expand all files Collapse all files

119
hotspot/src/share/vm/classfile/classLoader.hpp
View file

@ -33,8 +33,17 @@
// The VM class loader.
#include <sys/stat.h>
// Name of boot module image
#define BOOT_IMAGE_NAME "bootmodules.jimage"
// Name of boot "modules" image
#define MODULES_IMAGE_NAME "modules"
// Name of the resource containing mapping from module names to defining class loader type
#define MODULE_LOADER_MAP "jdk/internal/vm/cds/resources/ModuleLoaderMap.dat"
// Initial sizes of the following arrays are based on the generated ModuleLoaderMap.dat
#define INITIAL_BOOT_MODULES_ARRAY_SIZE 30
#define INITIAL_PLATFORM_MODULES_ARRAY_SIZE 15
// Class path entry (directory or zip file)
class JImageFile;
class ClassFileStream;
@ -49,6 +58,7 @@ public:
// may have unlocked readers, so write atomically.
OrderAccess::release_store_ptr(&_next, next);
}
virtual bool is_jrt() = 0;
virtual bool is_jar_file() const = 0;
virtual const char* name() const = 0;
virtual JImageFile* jimage() const = 0;
@ -59,13 +69,13 @@ public:
virtual ClassFileStream* open_stream(const char* name, TRAPS) = 0;
// Debugging
NOT_PRODUCT(virtual void compile_the_world(Handle loader, TRAPS) = 0;)
NOT_PRODUCT(virtual bool is_jrt() = 0;)
};
class ClassPathDirEntry: public ClassPathEntry {
private:
const char* _dir; // Name of directory
public:
bool is_jrt() { return false; }
bool is_jar_file() const { return false; }
const char* name() const { return _dir; }
JImageFile* jimage() const { return NULL; }
@ -73,7 +83,6 @@ class ClassPathDirEntry: public ClassPathEntry {
ClassFileStream* open_stream(const char* name, TRAPS);
// Debugging
NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);)
NOT_PRODUCT(bool is_jrt();)
};
@ -96,6 +105,7 @@ class ClassPathZipEntry: public ClassPathEntry {
jzfile* _zip; // The zip archive
const char* _zip_name; // Name of zip archive
public:
bool is_jrt() { return false; }
bool is_jar_file() const { return true; }
const char* name() const { return _zip_name; }
JImageFile* jimage() const { return NULL; }
@ -106,7 +116,6 @@ class ClassPathZipEntry: public ClassPathEntry {
void contents_do(void f(const char* name, void* context), void* context);
// Debugging
NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);)
NOT_PRODUCT(bool is_jrt();)
};
@ -116,29 +125,28 @@ private:
JImageFile* _jimage;
const char* _name;
public:
bool is_jrt();
bool is_jar_file() const { return false; }
bool is_open() const { return _jimage != NULL; }
const char* name() const { return _name == NULL ? "" : _name; }
JImageFile* jimage() const { return _jimage; }
ClassPathImageEntry(JImageFile* jimage, const char* name);
~ClassPathImageEntry();
static void name_to_package(const char* name, char* buffer, int length);
void name_to_package(const char* name, char* package, int length);
ClassFileStream* open_stream(const char* name, TRAPS);
// Debugging
NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);)
NOT_PRODUCT(bool is_jrt();)
};
class PackageHashtable;
class PackageInfo;
class SharedPathsMiscInfo;
template <MEMFLAGS F> class HashtableBucket;
class ClassLoader: AllStatic {
public:
enum SomeConstants {
package_hash_table_size = 31 // Number of buckets
enum ClassLoaderType {
BOOT_LOADER = 1, /* boot loader */
PLATFORM_LOADER = 2, /* PlatformClassLoader */
APP_LOADER = 3 /* AppClassLoader */
};
protected:
@ -177,41 +185,60 @@ class ClassLoader: AllStatic {
static PerfCounter* _isUnsyncloadClass;
static PerfCounter* _load_instance_class_failCounter;
// First entry in linked list of ClassPathEntry instances
// First entry in linked list of ClassPathEntry instances.
// This consists of entries made up by:
// - boot loader modules
// [-Xpatch]; exploded build | modules;
// - boot loader append path
// [-Xbootclasspath/a]; [jvmti appended entries]
static ClassPathEntry* _first_entry;
// Last entry in linked list of ClassPathEntry instances
static ClassPathEntry* _last_entry;
static int _num_entries;
// Hash table used to keep track of loaded packages
static PackageHashtable* _package_hash_table;
// Pointer into the linked list of ClassPathEntry instances.
// Marks the start of:
// - the boot loader's append path
// [-Xbootclasspath/a]; [jvmti appended entries]
static ClassPathEntry* _first_append_entry;
static const char* _shared_archive;
// True if the boot path has a "modules" jimage
static bool _has_jimage;
// Array of module names associated with the boot class loader
CDS_ONLY(static GrowableArray<char*>* _boot_modules_array;)
// Array of module names associated with the platform class loader
CDS_ONLY(static GrowableArray<char*>* _platform_modules_array;)
// Info used by CDS
CDS_ONLY(static SharedPathsMiscInfo * _shared_paths_misc_info;)
// Hash function
static unsigned int hash(const char *s, int n);
// Returns the package file name corresponding to the specified package
// or class name, or null if not found.
static PackageInfo* lookup_package(const char *pkgname);
// Adds a new package entry for the specified class or package name and
// corresponding directory or jar file name.
static bool add_package(const char *pkgname, int classpath_index, TRAPS);
// Initialization
static void setup_bootstrap_search_path();
static void setup_search_path(const char *class_path);
static void setup_search_path(const char *class_path, bool setting_bootstrap);
static void load_zip_library();
static void load_jimage_library();
static ClassPathEntry* create_class_path_entry(const char *path, const struct stat* st,
bool throw_exception, TRAPS);
public:
// If the package for the fully qualified class name is in the boot
// loader's package entry table then add_package() sets the classpath_index
// field so that get_system_package() will know to return a non-null value
// for the package's location. And, so that the package will be added to
// the list of packages returned by get_system_packages().
// For packages whose classes are loaded from the boot loader class path, the
// classpath_index indicates which entry on the boot loader class path.
static bool add_package(const char *fullq_class_name, s2 classpath_index, TRAPS);
// Canonicalizes path names, so strcmp will work properly. This is mainly
// to avoid confusing the zip library
static bool get_canonical_path(const char* orig, char* out, int len);
static const char* file_name_for_class_name(const char* class_name,
int class_name_len);
@ -220,6 +247,8 @@ class ClassLoader: AllStatic {
static int crc32(int crc, const char* buf, int len);
static bool update_class_path_entry_list(const char *path,
bool check_for_duplicates,
bool mark_append_entry,
bool prepend_entry,
bool throw_exception=true);
static void print_bootclasspath();
@ -284,8 +313,18 @@ class ClassLoader: AllStatic {
return _load_instance_class_failCounter;
}
// Sets _has_jimage to TRUE if "modules" jimage file exists
static void set_has_jimage(bool val) {
_has_jimage = val;
}
static bool has_jimage() { return _has_jimage; }
// Create the ModuleEntry for java.base
static void create_javabase();
// Load individual .class file
static instanceKlassHandle load_class(Symbol* class_name, TRAPS);
static instanceKlassHandle load_class(Symbol* class_name, bool search_append_only, TRAPS);
// If the specified package has been loaded by the system, then returns
// the name of the directory or ZIP file that the package was loaded from.
@ -304,9 +343,7 @@ class ClassLoader: AllStatic {
// Initialization
static void initialize();
CDS_ONLY(static void initialize_shared_path();)
static void create_package_info_table();
static void create_package_info_table(HashtableBucket<mtClass> *t, int length,
int number_of_entries);
static int compute_Object_vtable();
static ClassPathEntry* classpath_entry(int n) {
@ -320,8 +357,6 @@ class ClassLoader: AllStatic {
#if INCLUDE_CDS
// Sharing dump and restore
static void copy_package_info_buckets(char** top, char* end);
static void copy_package_info_table(char** top, char* end);
static void check_shared_classpath(const char *path);
static void finalize_shared_paths_misc_info();
@ -329,7 +364,12 @@ class ClassLoader: AllStatic {
static void* get_shared_paths_misc_info();
static bool check_shared_paths_misc_info(void* info, int size);
static void exit_with_path_failure(const char* error, const char* message);
static s2 module_to_classloader(const char* module_name);
static void initialize_module_loader_map(JImageFile* jimage);
#endif
static s2 classloader_type(Symbol* class_name, ClassPathEntry* e,
int classpath_index, TRAPS);
static void trace_class_path(const char* msg, const char* name = NULL);
@ -342,15 +382,30 @@ class ClassLoader: AllStatic {
static jlong class_link_count();
static jlong class_link_time_ms();
static void set_first_append_entry(ClassPathEntry* entry);
// indicates if class path already contains a entry (exact match by name)
static bool contains_entry(ClassPathEntry* entry);
// adds a class path list
static void add_to_list(ClassPathEntry* new_entry);
// prepends a class path list
static void prepend_to_list(ClassPathEntry* new_entry);
// creates a class path zip entry (returns NULL if JAR file cannot be opened)
static ClassPathZipEntry* create_class_path_zip_entry(const char *apath);
// add a path to class path list
static void add_to_list(const char* apath);
// prepend a path to class path list
static void prepend_to_list(const char* apath);
static bool string_ends_with(const char* str, const char* str_to_find);
static bool is_jrt(const char* name) { return string_ends_with(name, MODULES_IMAGE_NAME); }
// Debugging
static void verify() PRODUCT_RETURN;