duke@435: /* coleenp@4037: * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. duke@435: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@435: * duke@435: * This code is free software; you can redistribute it and/or modify it duke@435: * under the terms of the GNU General Public License version 2 only, as duke@435: * published by the Free Software Foundation. duke@435: * duke@435: * This code is distributed in the hope that it will be useful, but WITHOUT duke@435: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@435: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@435: * version 2 for more details (a copy is included in the LICENSE file that duke@435: * accompanied this code). duke@435: * duke@435: * You should have received a copy of the GNU General Public License version duke@435: * 2 along with this work; if not, write to the Free Software Foundation, duke@435: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@435: * trims@1907: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA trims@1907: * or visit www.oracle.com if you need additional information or have any trims@1907: * questions. duke@435: * duke@435: */ duke@435: stefank@2314: #include "precompiled.hpp" stefank@2314: #include "classfile/classFileParser.hpp" stefank@2314: #include "classfile/classFileStream.hpp" stefank@2314: #include "classfile/classLoader.hpp" coleenp@4304: #include "classfile/classLoaderData.inline.hpp" stefank@2314: #include "classfile/javaClasses.hpp" stefank@2314: #include "classfile/systemDictionary.hpp" stefank@2314: #include "classfile/vmSymbols.hpp" stefank@2314: #include "compiler/compileBroker.hpp" stefank@2314: #include "gc_interface/collectedHeap.inline.hpp" stefank@2314: #include "interpreter/bytecodeStream.hpp" stefank@2314: #include "interpreter/oopMapCache.hpp" stefank@2314: #include "memory/allocation.inline.hpp" stefank@2314: #include "memory/generation.hpp" stefank@2314: #include "memory/oopFactory.hpp" stefank@2314: #include "memory/universe.inline.hpp" stefank@2314: #include "oops/instanceKlass.hpp" stefank@2314: #include "oops/instanceRefKlass.hpp" stefank@2314: #include "oops/oop.inline.hpp" coleenp@2497: #include "oops/symbol.hpp" stefank@2314: #include "prims/jvm_misc.hpp" stefank@2314: #include "runtime/arguments.hpp" stefank@2314: #include "runtime/compilationPolicy.hpp" stefank@2314: #include "runtime/fprofiler.hpp" stefank@2314: #include "runtime/handles.hpp" stefank@2314: #include "runtime/handles.inline.hpp" stefank@2314: #include "runtime/init.hpp" stefank@2314: #include "runtime/interfaceSupport.hpp" stefank@2314: #include "runtime/java.hpp" stefank@2314: #include "runtime/javaCalls.hpp" stefank@2314: #include "runtime/threadCritical.hpp" stefank@2314: #include "runtime/timer.hpp" stefank@2314: #include "services/management.hpp" stefank@2314: #include "services/threadService.hpp" stefank@2314: #include "utilities/events.hpp" stefank@2314: #include "utilities/hashtable.hpp" stefank@2314: #include "utilities/hashtable.inline.hpp" stefank@2314: #ifdef TARGET_OS_FAMILY_linux stefank@2314: # include "os_linux.inline.hpp" stefank@2314: #endif stefank@2314: #ifdef TARGET_OS_FAMILY_solaris stefank@2314: # include "os_solaris.inline.hpp" stefank@2314: #endif stefank@2314: #ifdef TARGET_OS_FAMILY_windows stefank@2314: # include "os_windows.inline.hpp" stefank@2314: #endif never@3156: #ifdef TARGET_OS_FAMILY_bsd never@3156: # include "os_bsd.inline.hpp" never@3156: #endif duke@435: duke@435: duke@435: // Entry points in zip.dll for loading zip/jar file entries duke@435: duke@435: typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg); duke@435: typedef void (JNICALL *ZipClose_t)(jzfile *zip); duke@435: typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); duke@435: typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); duke@435: typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf); duke@435: typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n); duke@435: duke@435: static ZipOpen_t ZipOpen = NULL; duke@435: static ZipClose_t ZipClose = NULL; duke@435: static FindEntry_t FindEntry = NULL; duke@435: static ReadEntry_t ReadEntry = NULL; duke@435: static ReadMappedEntry_t ReadMappedEntry = NULL; duke@435: static GetNextEntry_t GetNextEntry = NULL; duke@435: static canonicalize_fn_t CanonicalizeEntry = NULL; duke@435: duke@435: // Globals duke@435: duke@435: PerfCounter* ClassLoader::_perf_accumulated_time = NULL; duke@435: PerfCounter* ClassLoader::_perf_classes_inited = NULL; duke@435: PerfCounter* ClassLoader::_perf_class_init_time = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_classes_verified = NULL; duke@435: PerfCounter* ClassLoader::_perf_class_verify_time = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; duke@435: PerfCounter* ClassLoader::_perf_classes_linked = NULL; duke@435: PerfCounter* ClassLoader::_perf_class_link_time = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_class_parse_time = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_app_classload_time = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_app_classload_count = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_define_appclasses = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; mchung@1310: PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; duke@435: PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; duke@435: PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; duke@435: PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; duke@435: PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; duke@435: PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; duke@435: PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; duke@435: PerfCounter* ClassLoader::_isUnsyncloadClass = NULL; duke@435: PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; duke@435: duke@435: ClassPathEntry* ClassLoader::_first_entry = NULL; duke@435: ClassPathEntry* ClassLoader::_last_entry = NULL; duke@435: PackageHashtable* ClassLoader::_package_hash_table = NULL; duke@435: duke@435: // helper routines duke@435: bool string_starts_with(const char* str, const char* str_to_find) { duke@435: size_t str_len = strlen(str); duke@435: size_t str_to_find_len = strlen(str_to_find); duke@435: if (str_to_find_len > str_len) { duke@435: return false; duke@435: } duke@435: return (strncmp(str, str_to_find, str_to_find_len) == 0); duke@435: } duke@435: duke@435: bool string_ends_with(const char* str, const char* str_to_find) { duke@435: size_t str_len = strlen(str); duke@435: size_t str_to_find_len = strlen(str_to_find); duke@435: if (str_to_find_len > str_len) { duke@435: return false; duke@435: } duke@435: return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); duke@435: } duke@435: duke@435: duke@435: MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) { duke@435: if (num_meta_package_names == 0) { duke@435: _meta_package_names = NULL; duke@435: _num_meta_package_names = 0; duke@435: } else { zgu@3900: _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names, mtClass); duke@435: _num_meta_package_names = num_meta_package_names; duke@435: memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*)); duke@435: } duke@435: } duke@435: duke@435: duke@435: MetaIndex::~MetaIndex() { zgu@3900: FREE_C_HEAP_ARRAY(char*, _meta_package_names, mtClass); duke@435: } duke@435: duke@435: duke@435: bool MetaIndex::may_contain(const char* class_name) { duke@435: if ( _num_meta_package_names == 0) { duke@435: return false; duke@435: } duke@435: size_t class_name_len = strlen(class_name); duke@435: for (int i = 0; i < _num_meta_package_names; i++) { duke@435: char* pkg = _meta_package_names[i]; duke@435: size_t pkg_len = strlen(pkg); duke@435: size_t min_len = MIN2(class_name_len, pkg_len); duke@435: if (!strncmp(class_name, pkg, min_len)) { duke@435: return true; duke@435: } duke@435: } duke@435: return false; duke@435: } duke@435: duke@435: duke@435: ClassPathEntry::ClassPathEntry() { duke@435: set_next(NULL); duke@435: } duke@435: duke@435: duke@435: bool ClassPathEntry::is_lazy() { duke@435: return false; duke@435: } duke@435: duke@435: ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() { zgu@3900: _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass); duke@435: strcpy(_dir, dir); duke@435: } duke@435: duke@435: duke@435: ClassFileStream* ClassPathDirEntry::open_stream(const char* name) { duke@435: // construct full path name duke@435: char path[JVM_MAXPATHLEN]; duke@435: if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) { duke@435: return NULL; duke@435: } duke@435: // check if file exists duke@435: struct stat st; duke@435: if (os::stat(path, &st) == 0) { duke@435: // found file, open it ikrylov@2322: int file_handle = os::open(path, 0, 0); duke@435: if (file_handle != -1) { duke@435: // read contents into resource array duke@435: u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); duke@435: size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); duke@435: // close file ikrylov@2322: os::close(file_handle); duke@435: // construct ClassFileStream duke@435: if (num_read == (size_t)st.st_size) { mchung@1310: if (UsePerfData) { mchung@1310: ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); mchung@1310: } duke@435: return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated duke@435: } duke@435: } duke@435: } duke@435: return NULL; duke@435: } duke@435: duke@435: duke@435: ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() { duke@435: _zip = zip; zgu@3900: _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass); duke@435: strcpy(_zip_name, zip_name); duke@435: } duke@435: duke@435: ClassPathZipEntry::~ClassPathZipEntry() { duke@435: if (ZipClose != NULL) { duke@435: (*ZipClose)(_zip); duke@435: } zgu@3900: FREE_C_HEAP_ARRAY(char, _zip_name, mtClass); duke@435: } duke@435: duke@435: ClassFileStream* ClassPathZipEntry::open_stream(const char* name) { duke@435: // enable call to C land duke@435: JavaThread* thread = JavaThread::current(); duke@435: ThreadToNativeFromVM ttn(thread); duke@435: // check whether zip archive contains name duke@435: jint filesize, name_len; duke@435: jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len); duke@435: if (entry == NULL) return NULL; duke@435: u1* buffer; duke@435: char name_buf[128]; duke@435: char* filename; duke@435: if (name_len < 128) { duke@435: filename = name_buf; duke@435: } else { duke@435: filename = NEW_RESOURCE_ARRAY(char, name_len + 1); duke@435: } duke@435: duke@435: // file found, get pointer to class in mmaped jar file. duke@435: if (ReadMappedEntry == NULL || duke@435: !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { duke@435: // mmaped access not available, perhaps due to compression, duke@435: // read contents into resource array duke@435: buffer = NEW_RESOURCE_ARRAY(u1, filesize); duke@435: if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; duke@435: } mchung@1310: if (UsePerfData) { mchung@1310: ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); mchung@1310: } duke@435: // return result duke@435: return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated duke@435: } duke@435: duke@435: // invoke function for each entry in the zip file duke@435: void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { duke@435: JavaThread* thread = JavaThread::current(); duke@435: HandleMark handle_mark(thread); duke@435: ThreadToNativeFromVM ttn(thread); duke@435: for (int n = 0; ; n++) { duke@435: jzentry * ze = ((*GetNextEntry)(_zip, n)); duke@435: if (ze == NULL) break; duke@435: (*f)(ze->name, context); duke@435: } duke@435: } duke@435: duke@435: LazyClassPathEntry::LazyClassPathEntry(char* path, struct stat st) : ClassPathEntry() { duke@435: _path = strdup(path); duke@435: _st = st; duke@435: _meta_index = NULL; duke@435: _resolved_entry = NULL; duke@435: } duke@435: duke@435: bool LazyClassPathEntry::is_jar_file() { duke@435: return ((_st.st_mode & S_IFREG) == S_IFREG); duke@435: } duke@435: duke@435: ClassPathEntry* LazyClassPathEntry::resolve_entry() { duke@435: if (_resolved_entry != NULL) { duke@435: return (ClassPathEntry*) _resolved_entry; duke@435: } duke@435: ClassPathEntry* new_entry = NULL; duke@435: ClassLoader::create_class_path_entry(_path, _st, &new_entry, false); duke@435: assert(new_entry != NULL, "earlier code should have caught this"); duke@435: { duke@435: ThreadCritical tc; duke@435: if (_resolved_entry == NULL) { duke@435: _resolved_entry = new_entry; duke@435: return new_entry; duke@435: } duke@435: } duke@435: assert(_resolved_entry != NULL, "bug in MT-safe resolution logic"); duke@435: delete new_entry; duke@435: return (ClassPathEntry*) _resolved_entry; duke@435: } duke@435: duke@435: ClassFileStream* LazyClassPathEntry::open_stream(const char* name) { duke@435: if (_meta_index != NULL && duke@435: !_meta_index->may_contain(name)) { duke@435: return NULL; duke@435: } duke@435: return resolve_entry()->open_stream(name); duke@435: } duke@435: duke@435: bool LazyClassPathEntry::is_lazy() { duke@435: return true; duke@435: } duke@435: duke@435: static void print_meta_index(LazyClassPathEntry* entry, duke@435: GrowableArray& meta_packages) { duke@435: tty->print("[Meta index for %s=", entry->name()); duke@435: for (int i = 0; i < meta_packages.length(); i++) { duke@435: if (i > 0) tty->print(" "); duke@435: tty->print(meta_packages.at(i)); duke@435: } duke@435: tty->print_cr("]"); duke@435: } duke@435: duke@435: duke@435: void ClassLoader::setup_meta_index() { duke@435: // Set up meta index which allows us to open boot jars lazily if duke@435: // class data sharing is enabled duke@435: const char* known_version = "% VERSION 2"; duke@435: char* meta_index_path = Arguments::get_meta_index_path(); duke@435: char* meta_index_dir = Arguments::get_meta_index_dir(); duke@435: FILE* file = fopen(meta_index_path, "r"); duke@435: int line_no = 0; duke@435: if (file != NULL) { duke@435: ResourceMark rm; duke@435: LazyClassPathEntry* cur_entry = NULL; duke@435: GrowableArray boot_class_path_packages(10); duke@435: char package_name[256]; duke@435: bool skipCurrentJar = false; duke@435: while (fgets(package_name, sizeof(package_name), file) != NULL) { duke@435: ++line_no; duke@435: // Remove trailing newline duke@435: package_name[strlen(package_name) - 1] = '\0'; duke@435: switch(package_name[0]) { duke@435: case '%': duke@435: { duke@435: if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) { duke@435: if (TraceClassLoading && Verbose) { duke@435: tty->print("[Unsupported meta index version]"); duke@435: } duke@435: fclose(file); duke@435: return; duke@435: } duke@435: } duke@435: duke@435: // These directives indicate jar files which contain only duke@435: // classes, only non-classfile resources, or a combination of duke@435: // the two. See src/share/classes/sun/misc/MetaIndex.java and duke@435: // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE duke@435: // workspace. duke@435: case '#': duke@435: case '!': duke@435: case '@': duke@435: { duke@435: // Hand off current packages to current lazy entry (if any) duke@435: if ((cur_entry != NULL) && duke@435: (boot_class_path_packages.length() > 0)) { duke@435: if (TraceClassLoading && Verbose) { duke@435: print_meta_index(cur_entry, boot_class_path_packages); duke@435: } duke@435: MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), duke@435: boot_class_path_packages.length()); duke@435: cur_entry->set_meta_index(index); duke@435: } duke@435: cur_entry = NULL; duke@435: boot_class_path_packages.clear(); duke@435: duke@435: // Find lazy entry corresponding to this jar file duke@435: for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) { duke@435: if (entry->is_lazy() && duke@435: string_starts_with(entry->name(), meta_index_dir) && duke@435: string_ends_with(entry->name(), &package_name[2])) { duke@435: cur_entry = (LazyClassPathEntry*) entry; duke@435: break; duke@435: } duke@435: } duke@435: duke@435: // If the first character is '@', it indicates the following jar duke@435: // file is a resource only jar file in which case, we should skip duke@435: // reading the subsequent entries since the resource loading is duke@435: // totally handled by J2SE side. duke@435: if (package_name[0] == '@') { duke@435: if (cur_entry != NULL) { duke@435: cur_entry->set_meta_index(new MetaIndex(NULL, 0)); duke@435: } duke@435: cur_entry = NULL; duke@435: skipCurrentJar = true; duke@435: } else { duke@435: skipCurrentJar = false; duke@435: } duke@435: duke@435: break; duke@435: } duke@435: duke@435: default: duke@435: { duke@435: if (!skipCurrentJar && cur_entry != NULL) { duke@435: char* new_name = strdup(package_name); duke@435: boot_class_path_packages.append(new_name); duke@435: } duke@435: } duke@435: } duke@435: } duke@435: // Hand off current packages to current lazy entry (if any) duke@435: if ((cur_entry != NULL) && duke@435: (boot_class_path_packages.length() > 0)) { duke@435: if (TraceClassLoading && Verbose) { duke@435: print_meta_index(cur_entry, boot_class_path_packages); duke@435: } duke@435: MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), duke@435: boot_class_path_packages.length()); duke@435: cur_entry->set_meta_index(index); duke@435: } duke@435: fclose(file); duke@435: } duke@435: } duke@435: duke@435: void ClassLoader::setup_bootstrap_search_path() { duke@435: assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); duke@435: char* sys_class_path = os::strdup(Arguments::get_sysclasspath()); duke@435: if (TraceClassLoading && Verbose) { duke@435: tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path); duke@435: } duke@435: duke@435: int len = (int)strlen(sys_class_path); duke@435: int end = 0; duke@435: duke@435: // Iterate over class path entries duke@435: for (int start = 0; start < len; start = end) { duke@435: while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) { duke@435: end++; duke@435: } zgu@3900: char* path = NEW_C_HEAP_ARRAY(char, end-start+1, mtClass); duke@435: strncpy(path, &sys_class_path[start], end-start); duke@435: path[end-start] = '\0'; duke@435: update_class_path_entry_list(path, false); zgu@3900: FREE_C_HEAP_ARRAY(char, path, mtClass); duke@435: while (sys_class_path[end] == os::path_separator()[0]) { duke@435: end++; duke@435: } duke@435: } duke@435: } duke@435: duke@435: void ClassLoader::create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy) { duke@435: JavaThread* thread = JavaThread::current(); duke@435: if (lazy) { duke@435: *new_entry = new LazyClassPathEntry(path, st); duke@435: return; duke@435: } duke@435: if ((st.st_mode & S_IFREG) == S_IFREG) { duke@435: // Regular file, should be a zip file duke@435: // Canonicalized filename duke@435: char canonical_path[JVM_MAXPATHLEN]; duke@435: if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { duke@435: // This matches the classic VM duke@435: EXCEPTION_MARK; duke@435: THROW_MSG(vmSymbols::java_io_IOException(), "Bad pathname"); duke@435: } duke@435: char* error_msg = NULL; duke@435: jzfile* zip; duke@435: { duke@435: // enable call to C land duke@435: ThreadToNativeFromVM ttn(thread); duke@435: HandleMark hm(thread); duke@435: zip = (*ZipOpen)(canonical_path, &error_msg); duke@435: } duke@435: if (zip != NULL && error_msg == NULL) { duke@435: *new_entry = new ClassPathZipEntry(zip, path); duke@435: if (TraceClassLoading) { duke@435: tty->print_cr("[Opened %s]", path); duke@435: } duke@435: } else { duke@435: ResourceMark rm(thread); duke@435: char *msg; duke@435: if (error_msg == NULL) { duke@435: msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; duke@435: jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); duke@435: } else { duke@435: int len = (int)(strlen(path) + strlen(error_msg) + 128); duke@435: msg = NEW_RESOURCE_ARRAY(char, len); ; duke@435: jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); duke@435: } duke@435: EXCEPTION_MARK; duke@435: THROW_MSG(vmSymbols::java_lang_ClassNotFoundException(), msg); duke@435: } duke@435: } else { duke@435: // Directory duke@435: *new_entry = new ClassPathDirEntry(path); duke@435: if (TraceClassLoading) { duke@435: tty->print_cr("[Path %s]", path); duke@435: } duke@435: } duke@435: } duke@435: duke@435: duke@435: // Create a class path zip entry for a given path (return NULL if not found duke@435: // or zip/JAR file cannot be opened) duke@435: ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) { duke@435: // check for a regular file duke@435: struct stat st; duke@435: if (os::stat(path, &st) == 0) { duke@435: if ((st.st_mode & S_IFREG) == S_IFREG) { duke@435: char orig_path[JVM_MAXPATHLEN]; duke@435: char canonical_path[JVM_MAXPATHLEN]; duke@435: duke@435: strcpy(orig_path, path); duke@435: if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) { duke@435: char* error_msg = NULL; duke@435: jzfile* zip; duke@435: { duke@435: // enable call to C land duke@435: JavaThread* thread = JavaThread::current(); duke@435: ThreadToNativeFromVM ttn(thread); duke@435: HandleMark hm(thread); duke@435: zip = (*ZipOpen)(canonical_path, &error_msg); duke@435: } duke@435: if (zip != NULL && error_msg == NULL) { duke@435: // create using canonical path duke@435: return new ClassPathZipEntry(zip, canonical_path); duke@435: } duke@435: } duke@435: } duke@435: } duke@435: return NULL; duke@435: } duke@435: duke@435: // returns true if entry already on class path duke@435: bool ClassLoader::contains_entry(ClassPathEntry *entry) { duke@435: ClassPathEntry* e = _first_entry; duke@435: while (e != NULL) { duke@435: // assume zip entries have been canonicalized duke@435: if (strcmp(entry->name(), e->name()) == 0) { duke@435: return true; duke@435: } duke@435: e = e->next(); duke@435: } duke@435: return false; duke@435: } duke@435: duke@435: void ClassLoader::add_to_list(ClassPathEntry *new_entry) { duke@435: if (new_entry != NULL) { duke@435: if (_last_entry == NULL) { duke@435: _first_entry = _last_entry = new_entry; duke@435: } else { duke@435: _last_entry->set_next(new_entry); duke@435: _last_entry = new_entry; duke@435: } duke@435: } duke@435: } duke@435: duke@435: void ClassLoader::update_class_path_entry_list(const char *path, duke@435: bool check_for_duplicates) { duke@435: struct stat st; duke@435: if (os::stat((char *)path, &st) == 0) { duke@435: // File or directory found duke@435: ClassPathEntry* new_entry = NULL; duke@435: create_class_path_entry((char *)path, st, &new_entry, LazyBootClassLoader); duke@435: // The kernel VM adds dynamically to the end of the classloader path and duke@435: // doesn't reorder the bootclasspath which would break java.lang.Package duke@435: // (see PackageInfo). duke@435: // Add new entry to linked list duke@435: if (!check_for_duplicates || !contains_entry(new_entry)) { duke@435: add_to_list(new_entry); duke@435: } duke@435: } duke@435: } duke@435: duke@435: void ClassLoader::print_bootclasspath() { duke@435: ClassPathEntry* e = _first_entry; duke@435: tty->print("[bootclasspath= "); duke@435: while (e != NULL) { duke@435: tty->print("%s ;", e->name()); duke@435: e = e->next(); duke@435: } duke@435: tty->print_cr("]"); duke@435: } duke@435: duke@435: void ClassLoader::load_zip_library() { duke@435: assert(ZipOpen == NULL, "should not load zip library twice"); duke@435: // First make sure native library is loaded duke@435: os::native_java_library(); duke@435: // Load zip library duke@435: char path[JVM_MAXPATHLEN]; duke@435: char ebuf[1024]; bpittore@4261: void* handle = NULL; bpittore@4261: if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip")) { bpittore@4261: handle = os::dll_load(path, ebuf, sizeof ebuf); bpittore@4261: } duke@435: if (handle == NULL) { duke@435: vm_exit_during_initialization("Unable to load ZIP library", path); duke@435: } duke@435: // Lookup zip entry points ikrylov@2322: ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); ikrylov@2322: ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); ikrylov@2322: FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); ikrylov@2322: ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); ikrylov@2322: ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry")); ikrylov@2322: GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); duke@435: duke@435: // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL duke@435: if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) { duke@435: vm_exit_during_initialization("Corrupted ZIP library", path); duke@435: } duke@435: duke@435: // Lookup canonicalize entry in libjava.dll duke@435: void *javalib_handle = os::native_java_library(); ikrylov@2322: CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); duke@435: // This lookup only works on 1.3. Do not check for non-null here duke@435: } duke@435: duke@435: // PackageInfo data exists in order to support the java.lang.Package duke@435: // class. A Package object provides information about a java package duke@435: // (version, vendor, etc.) which originates in the manifest of the jar duke@435: // file supplying the package. For application classes, the ClassLoader duke@435: // object takes care of this. duke@435: duke@435: // For system (boot) classes, the Java code in the Package class needs duke@435: // to be able to identify which source jar file contained the boot duke@435: // class, so that it can extract the manifest from it. This table duke@435: // identifies java packages with jar files in the boot classpath. duke@435: duke@435: // Because the boot classpath cannot change, the classpath index is duke@435: // sufficient to identify the source jar file or directory. (Since duke@435: // directories have no manifests, the directory name is not required, duke@435: // but is available.) duke@435: duke@435: // When using sharing -- the pathnames of entries in the boot classpath duke@435: // may not be the same at runtime as they were when the archive was duke@435: // created (NFS, Samba, etc.). The actual files and directories named duke@435: // in the classpath must be the same files, in the same order, even duke@435: // though the exact name is not the same. duke@435: zgu@3900: class PackageInfo: public BasicHashtableEntry { duke@435: public: duke@435: const char* _pkgname; // Package name duke@435: int _classpath_index; // Index of directory or JAR file loaded from duke@435: duke@435: PackageInfo* next() { zgu@3900: return (PackageInfo*)BasicHashtableEntry::next(); duke@435: } duke@435: duke@435: const char* pkgname() { return _pkgname; } duke@435: void set_pkgname(char* pkgname) { _pkgname = pkgname; } duke@435: duke@435: const char* filename() { duke@435: return ClassLoader::classpath_entry(_classpath_index)->name(); duke@435: } duke@435: duke@435: void set_index(int index) { duke@435: _classpath_index = index; duke@435: } duke@435: }; duke@435: duke@435: zgu@3900: class PackageHashtable : public BasicHashtable { duke@435: private: duke@435: inline unsigned int compute_hash(const char *s, int n) { duke@435: unsigned int val = 0; duke@435: while (--n >= 0) { duke@435: val = *s++ + 31 * val; duke@435: } duke@435: return val; duke@435: } duke@435: duke@435: PackageInfo* bucket(int index) { zgu@3900: return (PackageInfo*)BasicHashtable::bucket(index); duke@435: } duke@435: duke@435: PackageInfo* get_entry(int index, unsigned int hash, duke@435: const char* pkgname, size_t n) { duke@435: for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) { duke@435: if (pp->hash() == hash && duke@435: strncmp(pkgname, pp->pkgname(), n) == 0 && duke@435: pp->pkgname()[n] == '\0') { duke@435: return pp; duke@435: } duke@435: } duke@435: return NULL; duke@435: } duke@435: duke@435: public: duke@435: PackageHashtable(int table_size) zgu@3900: : BasicHashtable(table_size, sizeof(PackageInfo)) {} duke@435: zgu@3900: PackageHashtable(int table_size, HashtableBucket* t, int number_of_entries) zgu@3900: : BasicHashtable(table_size, sizeof(PackageInfo), t, number_of_entries) {} duke@435: duke@435: PackageInfo* get_entry(const char* pkgname, int n) { duke@435: unsigned int hash = compute_hash(pkgname, n); duke@435: return get_entry(hash_to_index(hash), hash, pkgname, n); duke@435: } duke@435: duke@435: PackageInfo* new_entry(char* pkgname, int n) { duke@435: unsigned int hash = compute_hash(pkgname, n); duke@435: PackageInfo* pp; zgu@3900: pp = (PackageInfo*)BasicHashtable::new_entry(hash); duke@435: pp->set_pkgname(pkgname); duke@435: return pp; duke@435: } duke@435: duke@435: void add_entry(PackageInfo* pp) { duke@435: int index = hash_to_index(pp->hash()); zgu@3900: BasicHashtable::add_entry(index, pp); duke@435: } duke@435: duke@435: void copy_pkgnames(const char** packages) { duke@435: int n = 0; duke@435: for (int i = 0; i < table_size(); ++i) { duke@435: for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) { duke@435: packages[n++] = pp->pkgname(); duke@435: } duke@435: } duke@435: assert(n == number_of_entries(), "just checking"); duke@435: } duke@435: duke@435: void copy_table(char** top, char* end, PackageHashtable* table); duke@435: }; duke@435: duke@435: duke@435: void PackageHashtable::copy_table(char** top, char* end, duke@435: PackageHashtable* table) { duke@435: // Copy (relocate) the table to the shared space. zgu@3900: BasicHashtable::copy_table(top, end); duke@435: duke@435: // Calculate the space needed for the package name strings. duke@435: int i; duke@435: int n = 0; duke@435: for (i = 0; i < table_size(); ++i) { duke@435: for (PackageInfo* pp = table->bucket(i); duke@435: pp != NULL; duke@435: pp = pp->next()) { duke@435: n += (int)(strlen(pp->pkgname()) + 1); duke@435: } duke@435: } duke@435: if (*top + n + sizeof(intptr_t) >= end) { coleenp@2497: report_out_of_shared_space(SharedMiscData); duke@435: } duke@435: duke@435: // Copy the table data (the strings) to the shared space. duke@435: n = align_size_up(n, sizeof(HeapWord)); duke@435: *(intptr_t*)(*top) = n; duke@435: *top += sizeof(intptr_t); duke@435: duke@435: for (i = 0; i < table_size(); ++i) { duke@435: for (PackageInfo* pp = table->bucket(i); duke@435: pp != NULL; duke@435: pp = pp->next()) { duke@435: int n1 = (int)(strlen(pp->pkgname()) + 1); duke@435: pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1)); duke@435: *top += n1; duke@435: } duke@435: } duke@435: *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord)); duke@435: } duke@435: duke@435: duke@435: void ClassLoader::copy_package_info_buckets(char** top, char* end) { duke@435: _package_hash_table->copy_buckets(top, end); duke@435: } duke@435: duke@435: void ClassLoader::copy_package_info_table(char** top, char* end) { duke@435: _package_hash_table->copy_table(top, end, _package_hash_table); duke@435: } duke@435: duke@435: duke@435: PackageInfo* ClassLoader::lookup_package(const char *pkgname) { duke@435: const char *cp = strrchr(pkgname, '/'); duke@435: if (cp != NULL) { duke@435: // Package prefix found duke@435: int n = cp - pkgname + 1; duke@435: return _package_hash_table->get_entry(pkgname, n); duke@435: } duke@435: return NULL; duke@435: } duke@435: duke@435: duke@435: bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) { duke@435: assert(pkgname != NULL, "just checking"); duke@435: // Bootstrap loader no longer holds system loader lock obj serializing duke@435: // load_instance_class and thereby add_package duke@435: { duke@435: MutexLocker ml(PackageTable_lock, THREAD); duke@435: // First check for previously loaded entry duke@435: PackageInfo* pp = lookup_package(pkgname); duke@435: if (pp != NULL) { duke@435: // Existing entry found, check source of package duke@435: pp->set_index(classpath_index); duke@435: return true; duke@435: } duke@435: duke@435: const char *cp = strrchr(pkgname, '/'); duke@435: if (cp != NULL) { duke@435: // Package prefix found duke@435: int n = cp - pkgname + 1; duke@435: zgu@3900: char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1, mtClass); duke@435: if (new_pkgname == NULL) { duke@435: return false; duke@435: } duke@435: duke@435: memcpy(new_pkgname, pkgname, n); duke@435: new_pkgname[n] = '\0'; duke@435: pp = _package_hash_table->new_entry(new_pkgname, n); duke@435: pp->set_index(classpath_index); duke@435: duke@435: // Insert into hash table duke@435: _package_hash_table->add_entry(pp); duke@435: } duke@435: return true; duke@435: } duke@435: } duke@435: duke@435: duke@435: oop ClassLoader::get_system_package(const char* name, TRAPS) { duke@435: PackageInfo* pp; duke@435: { duke@435: MutexLocker ml(PackageTable_lock, THREAD); duke@435: pp = lookup_package(name); duke@435: } duke@435: if (pp == NULL) { duke@435: return NULL; duke@435: } else { duke@435: Handle p = java_lang_String::create_from_str(pp->filename(), THREAD); duke@435: return p(); duke@435: } duke@435: } duke@435: duke@435: duke@435: objArrayOop ClassLoader::get_system_packages(TRAPS) { duke@435: ResourceMark rm(THREAD); duke@435: int nof_entries; duke@435: const char** packages; duke@435: { duke@435: MutexLocker ml(PackageTable_lock, THREAD); duke@435: // Allocate resource char* array containing package names duke@435: nof_entries = _package_hash_table->number_of_entries(); duke@435: if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) { duke@435: return NULL; duke@435: } duke@435: _package_hash_table->copy_pkgnames(packages); duke@435: } duke@435: // Allocate objArray and fill with java.lang.String never@1577: objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), duke@435: nof_entries, CHECK_0); duke@435: objArrayHandle result(THREAD, r); duke@435: for (int i = 0; i < nof_entries; i++) { duke@435: Handle str = java_lang_String::create_from_str(packages[i], CHECK_0); duke@435: result->obj_at_put(i, str()); duke@435: } duke@435: duke@435: return result(); duke@435: } duke@435: duke@435: coleenp@2497: instanceKlassHandle ClassLoader::load_classfile(Symbol* h_name, TRAPS) { duke@435: ResourceMark rm(THREAD); coleenp@2497: EventMark m("loading class " INTPTR_FORMAT, (address)h_name); duke@435: ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); duke@435: duke@435: stringStream st; duke@435: // st.print() uses too much stack space while handling a StackOverflowError duke@435: // st.print("%s.class", h_name->as_utf8()); duke@435: st.print_raw(h_name->as_utf8()); duke@435: st.print_raw(".class"); duke@435: char* name = st.as_string(); duke@435: duke@435: // Lookup stream for parsing .class file duke@435: ClassFileStream* stream = NULL; duke@435: int classpath_index = 0; duke@435: { mchung@1310: PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(), mchung@1310: ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(), mchung@1310: PerfClassTraceTime::CLASS_LOAD); duke@435: ClassPathEntry* e = _first_entry; duke@435: while (e != NULL) { duke@435: stream = e->open_stream(name); duke@435: if (stream != NULL) { duke@435: break; duke@435: } duke@435: e = e->next(); duke@435: ++classpath_index; duke@435: } duke@435: } duke@435: coleenp@4037: instanceKlassHandle h; duke@435: if (stream != NULL) { duke@435: duke@435: // class file found, parse it duke@435: ClassFileParser parser(stream); coleenp@4304: ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); duke@435: Handle protection_domain; coleenp@2497: TempNewSymbol parsed_name = NULL; duke@435: instanceKlassHandle result = parser.parseClassFile(h_name, coleenp@4304: loader_data, duke@435: protection_domain, duke@435: parsed_name, acorn@1408: false, duke@435: CHECK_(h)); duke@435: duke@435: // add to package table duke@435: if (add_package(name, classpath_index, THREAD)) { duke@435: h = result; duke@435: } duke@435: } duke@435: duke@435: return h; duke@435: } duke@435: duke@435: zgu@3900: void ClassLoader::create_package_info_table(HashtableBucket *t, int length, duke@435: int number_of_entries) { duke@435: assert(_package_hash_table == NULL, "One package info table allowed."); zgu@3900: assert(length == package_hash_table_size * sizeof(HashtableBucket), duke@435: "bad shared package info size."); duke@435: _package_hash_table = new PackageHashtable(package_hash_table_size, t, duke@435: number_of_entries); duke@435: } duke@435: duke@435: duke@435: void ClassLoader::create_package_info_table() { duke@435: assert(_package_hash_table == NULL, "shouldn't have one yet"); duke@435: _package_hash_table = new PackageHashtable(package_hash_table_size); duke@435: } duke@435: duke@435: duke@435: // Initialize the class loader's access to methods in libzip. Parse and duke@435: // process the boot classpath into a list ClassPathEntry objects. Once duke@435: // this list has been created, it must not change order (see class PackageInfo) duke@435: // it can be appended to and is by jvmti and the kernel vm. duke@435: duke@435: void ClassLoader::initialize() { duke@435: assert(_package_hash_table == NULL, "should have been initialized by now."); duke@435: EXCEPTION_MARK; duke@435: duke@435: if (UsePerfData) { duke@435: // jvmstat performance counters duke@435: NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); duke@435: NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); mchung@1310: NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); duke@435: NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); mchung@1310: NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); duke@435: NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); mchung@1310: NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); duke@435: NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); duke@435: NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); mchung@1310: NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); mchung@1310: mchung@1310: NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); mchung@1310: NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); mchung@1310: NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); mchung@1310: NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); mchung@1310: NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); mchung@1310: NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); mchung@1310: NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); mchung@1310: NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); mchung@1310: NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); mchung@1310: NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); mchung@1310: NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); mchung@1310: NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); mchung@1310: NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); mchung@1310: duke@435: duke@435: // The following performance counters are added for measuring the impact duke@435: // of the bug fix of 6365597. They are mainly focused on finding out duke@435: // the behavior of system & user-defined classloader lock, whether duke@435: // ClassLoader.loadClass/findClass is being called synchronized or not. duke@435: // Also two additional counters are created to see whether 'UnsyncloadClass' duke@435: // flag is being set or not and how many times load_instance_class call duke@435: // fails with linkageError etc. duke@435: NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, duke@435: "systemLoaderLockContentionRate"); duke@435: NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, duke@435: "nonSystemLoaderLockContentionRate"); duke@435: NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, duke@435: "jvmFindLoadedClassNoLockCalls"); duke@435: NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, duke@435: "jvmDefineClassNoLockCalls"); duke@435: duke@435: NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, duke@435: "jniDefineClassNoLockCalls"); duke@435: duke@435: NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, duke@435: "unsafeDefineClassCalls"); duke@435: duke@435: NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); duke@435: NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, duke@435: "loadInstanceClassFailRate"); duke@435: duke@435: // increment the isUnsyncloadClass counter if UnsyncloadClass is set. duke@435: if (UnsyncloadClass) { duke@435: _isUnsyncloadClass->inc(); duke@435: } duke@435: } duke@435: duke@435: // lookup zip library entry points duke@435: load_zip_library(); duke@435: // initialize search path duke@435: setup_bootstrap_search_path(); duke@435: if (LazyBootClassLoader) { duke@435: // set up meta index which makes boot classpath initialization lazier duke@435: setup_meta_index(); duke@435: } duke@435: } duke@435: duke@435: duke@435: jlong ClassLoader::classloader_time_ms() { duke@435: return UsePerfData ? duke@435: Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; duke@435: } duke@435: duke@435: jlong ClassLoader::class_init_count() { duke@435: return UsePerfData ? _perf_classes_inited->get_value() : -1; duke@435: } duke@435: duke@435: jlong ClassLoader::class_init_time_ms() { duke@435: return UsePerfData ? duke@435: Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; duke@435: } duke@435: duke@435: jlong ClassLoader::class_verify_time_ms() { duke@435: return UsePerfData ? duke@435: Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; duke@435: } duke@435: duke@435: jlong ClassLoader::class_link_count() { duke@435: return UsePerfData ? _perf_classes_linked->get_value() : -1; duke@435: } duke@435: duke@435: jlong ClassLoader::class_link_time_ms() { duke@435: return UsePerfData ? duke@435: Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; duke@435: } duke@435: duke@435: int ClassLoader::compute_Object_vtable() { duke@435: // hardwired for JDK1.2 -- would need to duplicate class file parsing duke@435: // code to determine actual value from file duke@435: // Would be value '11' if finals were in vtable duke@435: int JDK_1_2_Object_vtable_size = 5; duke@435: return JDK_1_2_Object_vtable_size * vtableEntry::size(); duke@435: } duke@435: duke@435: duke@435: void classLoader_init() { duke@435: ClassLoader::initialize(); duke@435: } duke@435: duke@435: duke@435: bool ClassLoader::get_canonical_path(char* orig, char* out, int len) { duke@435: assert(orig != NULL && out != NULL && len > 0, "bad arguments"); duke@435: if (CanonicalizeEntry != NULL) { duke@435: JNIEnv* env = JavaThread::current()->jni_environment(); ikrylov@2322: if ((CanonicalizeEntry)(env, os::native_path(orig), out, len) < 0) { duke@435: return false; duke@435: } duke@435: } else { duke@435: // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing duke@435: strncpy(out, orig, len); duke@435: out[len - 1] = '\0'; duke@435: } duke@435: return true; duke@435: } duke@435: duke@435: #ifndef PRODUCT duke@435: duke@435: void ClassLoader::verify() { duke@435: _package_hash_table->verify(); duke@435: } duke@435: duke@435: duke@435: // CompileTheWorld duke@435: // duke@435: // Iterates over all class path entries and forces compilation of all methods duke@435: // in all classes found. Currently, only zip/jar archives are searched. duke@435: // duke@435: // The classes are loaded by the Java level bootstrap class loader, and the duke@435: // initializer is called. If DelayCompilationDuringStartup is true (default), duke@435: // the interpreter will run the initialization code. Note that forcing duke@435: // initialization in this way could potentially lead to initialization order duke@435: // problems, in which case we could just force the initialization bit to be set. duke@435: duke@435: duke@435: // We need to iterate over the contents of a zip/jar file, so we replicate the duke@435: // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, duke@435: // since jzfile already has a void* definition. duke@435: // duke@435: // Note that this is only used in debug mode. duke@435: // duke@435: // HotSpot integration note: duke@435: // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build duke@435: duke@435: duke@435: // JDK 1.3 version duke@435: typedef struct real_jzentry13 { /* Zip file entry */ duke@435: char *name; /* entry name */ duke@435: jint time; /* modification time */ duke@435: jint size; /* size of uncompressed data */ duke@435: jint csize; /* size of compressed data (zero if uncompressed) */ duke@435: jint crc; /* crc of uncompressed data */ duke@435: char *comment; /* optional zip file comment */ duke@435: jbyte *extra; /* optional extra data */ duke@435: jint pos; /* position of LOC header (if negative) or data */ duke@435: } real_jzentry13; duke@435: duke@435: typedef struct real_jzfile13 { /* Zip file */ duke@435: char *name; /* zip file name */ duke@435: jint refs; /* number of active references */ duke@435: jint fd; /* open file descriptor */ duke@435: void *lock; /* read lock */ duke@435: char *comment; /* zip file comment */ duke@435: char *msg; /* zip error message */ duke@435: void *entries; /* array of hash cells */ duke@435: jint total; /* total number of entries */ duke@435: unsigned short *table; /* Hash chain heads: indexes into entries */ duke@435: jint tablelen; /* number of hash eads */ duke@435: real_jzfile13 *next; /* next zip file in search list */ duke@435: jzentry *cache; /* we cache the most recently freed jzentry */ duke@435: /* Information on metadata names in META-INF directory */ duke@435: char **metanames; /* array of meta names (may have null names) */ duke@435: jint metacount; /* number of slots in metanames array */ duke@435: /* If there are any per-entry comments, they are in the comments array */ duke@435: char **comments; duke@435: } real_jzfile13; duke@435: duke@435: // JDK 1.2 version duke@435: typedef struct real_jzentry12 { /* Zip file entry */ duke@435: char *name; /* entry name */ duke@435: jint time; /* modification time */ duke@435: jint size; /* size of uncompressed data */ duke@435: jint csize; /* size of compressed data (zero if uncompressed) */ duke@435: jint crc; /* crc of uncompressed data */ duke@435: char *comment; /* optional zip file comment */ duke@435: jbyte *extra; /* optional extra data */ duke@435: jint pos; /* position of LOC header (if negative) or data */ duke@435: struct real_jzentry12 *next; /* next entry in hash table */ duke@435: } real_jzentry12; duke@435: duke@435: typedef struct real_jzfile12 { /* Zip file */ duke@435: char *name; /* zip file name */ duke@435: jint refs; /* number of active references */ duke@435: jint fd; /* open file descriptor */ duke@435: void *lock; /* read lock */ duke@435: char *comment; /* zip file comment */ duke@435: char *msg; /* zip error message */ duke@435: real_jzentry12 *entries; /* array of zip entries */ duke@435: jint total; /* total number of entries */ duke@435: real_jzentry12 **table; /* hash table of entries */ duke@435: jint tablelen; /* number of buckets */ duke@435: jzfile *next; /* next zip file in search list */ duke@435: } real_jzfile12; duke@435: duke@435: duke@435: void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { duke@435: // For now we only compile all methods in all classes in zip/jar files duke@435: tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); duke@435: tty->cr(); duke@435: } duke@435: duke@435: duke@435: bool ClassPathDirEntry::is_rt_jar() { duke@435: return false; duke@435: } duke@435: duke@435: void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { duke@435: if (JDK_Version::is_jdk12x_version()) { duke@435: compile_the_world12(loader, THREAD); duke@435: } else { duke@435: compile_the_world13(loader, THREAD); duke@435: } duke@435: if (HAS_PENDING_EXCEPTION) { duke@435: if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { duke@435: CLEAR_PENDING_EXCEPTION; duke@435: tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); coleenp@4037: tty->print_cr("Increase class metadata storage if a limit was set"); duke@435: } else { duke@435: tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); duke@435: } duke@435: } duke@435: } duke@435: duke@435: // Version that works for JDK 1.3.x duke@435: void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) { duke@435: real_jzfile13* zip = (real_jzfile13*) _zip; duke@435: tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); duke@435: tty->cr(); duke@435: // Iterate over all entries in zip file duke@435: for (int n = 0; ; n++) { duke@435: real_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n)); duke@435: if (ze == NULL) break; duke@435: ClassLoader::compile_the_world_in(ze->name, loader, CHECK); duke@435: } duke@435: } duke@435: duke@435: duke@435: // Version that works for JDK 1.2.x duke@435: void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) { duke@435: real_jzfile12* zip = (real_jzfile12*) _zip; duke@435: tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); duke@435: tty->cr(); duke@435: // Iterate over all entries in zip file duke@435: for (int n = 0; ; n++) { duke@435: real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n)); duke@435: if (ze == NULL) break; duke@435: ClassLoader::compile_the_world_in(ze->name, loader, CHECK); duke@435: } duke@435: } duke@435: duke@435: bool ClassPathZipEntry::is_rt_jar() { duke@435: if (JDK_Version::is_jdk12x_version()) { duke@435: return is_rt_jar12(); duke@435: } else { duke@435: return is_rt_jar13(); duke@435: } duke@435: } duke@435: duke@435: // JDK 1.3 version duke@435: bool ClassPathZipEntry::is_rt_jar13() { duke@435: real_jzfile13* zip = (real_jzfile13*) _zip; duke@435: int len = (int)strlen(zip->name); duke@435: // Check whether zip name ends in "rt.jar" duke@435: // This will match other archives named rt.jar as well, but this is duke@435: // only used for debugging. duke@435: return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); duke@435: } duke@435: duke@435: // JDK 1.2 version duke@435: bool ClassPathZipEntry::is_rt_jar12() { duke@435: real_jzfile12* zip = (real_jzfile12*) _zip; duke@435: int len = (int)strlen(zip->name); duke@435: // Check whether zip name ends in "rt.jar" duke@435: // This will match other archives named rt.jar as well, but this is duke@435: // only used for debugging. duke@435: return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); duke@435: } duke@435: duke@435: void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) { duke@435: resolve_entry()->compile_the_world(loader, CHECK); duke@435: } duke@435: duke@435: bool LazyClassPathEntry::is_rt_jar() { duke@435: return resolve_entry()->is_rt_jar(); duke@435: } duke@435: duke@435: void ClassLoader::compile_the_world() { duke@435: EXCEPTION_MARK; duke@435: HandleMark hm(THREAD); duke@435: ResourceMark rm(THREAD); duke@435: // Make sure we don't run with background compilation duke@435: BackgroundCompilation = false; duke@435: // Find bootstrap loader duke@435: Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); duke@435: // Iterate over all bootstrap class path entries duke@435: ClassPathEntry* e = _first_entry; twisti@4940: jlong start = os::javaTimeMillis(); duke@435: while (e != NULL) { duke@435: // We stop at rt.jar, unless it is the first bootstrap path entry duke@435: if (e->is_rt_jar() && e != _first_entry) break; duke@435: e->compile_the_world(system_class_loader, CATCH); duke@435: e = e->next(); duke@435: } twisti@4940: jlong end = os::javaTimeMillis(); twisti@4940: tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, %d ms)", twisti@4940: _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start)); duke@435: { duke@435: // Print statistics as if before normal exit: duke@435: extern void print_statistics(); duke@435: print_statistics(); duke@435: } duke@435: vm_exit(0); duke@435: } duke@435: twisti@4940: int ClassLoader::_compile_the_world_class_counter = 0; twisti@4940: int ClassLoader::_compile_the_world_method_counter = 0; kvn@1623: static int _codecache_sweep_counter = 0; duke@435: never@2564: // Filter out all exceptions except OOMs never@2564: static void clear_pending_exception_if_not_oom(TRAPS) { never@2564: if (HAS_PENDING_EXCEPTION && never@2564: !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { never@2564: CLEAR_PENDING_EXCEPTION; never@2564: } never@2564: // The CHECK at the caller will propagate the exception out never@2564: } never@2564: duke@435: void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { duke@435: int len = (int)strlen(name); duke@435: if (len > 6 && strcmp(".class", name + len - 6) == 0) { duke@435: // We have a .class file duke@435: char buffer[2048]; duke@435: strncpy(buffer, name, len - 6); duke@435: buffer[len-6] = 0; duke@435: // If the file has a period after removing .class, it's not really a duke@435: // valid class file. The class loader will check everything else. duke@435: if (strchr(buffer, '.') == NULL) { twisti@4940: _compile_the_world_class_counter++; twisti@4940: if (_compile_the_world_class_counter > CompileTheWorldStopAt) return; never@1158: never@1158: // Construct name without extension coleenp@2497: TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK); never@1158: // Use loader to load and initialize class coleenp@4037: Klass* ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); never@1158: instanceKlassHandle k (THREAD, ik); never@1158: if (k.not_null() && !HAS_PENDING_EXCEPTION) { never@1158: k->initialize(THREAD); never@1158: } never@1158: bool exception_occurred = HAS_PENDING_EXCEPTION; never@2564: clear_pending_exception_if_not_oom(CHECK); never@1158: if (CompileTheWorldPreloadClasses && k.not_null()) { coleenp@4037: ConstantPool::preload_and_initialize_all_classes(k->constants(), THREAD); never@1158: if (HAS_PENDING_EXCEPTION) { never@1158: // If something went wrong in preloading we just ignore it never@2564: clear_pending_exception_if_not_oom(CHECK); twisti@4940: tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer); duke@435: } never@1158: } never@1158: twisti@4940: if (_compile_the_world_class_counter >= CompileTheWorldStartAt) { never@2605: if (k.is_null() || exception_occurred) { duke@435: // If something went wrong (e.g. ExceptionInInitializerError) we skip this class twisti@4940: tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer); duke@435: } else { twisti@4940: tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer); duke@435: // Preload all classes to get around uncommon traps duke@435: // Iterate over all methods in class iignatyev@5032: int comp_level = CompilationPolicy::policy()->initial_compile_level(); duke@435: for (int n = 0; n < k->methods()->length(); n++) { coleenp@4037: methodHandle m (THREAD, k->methods()->at(n)); iignatyev@5032: if (CompilationPolicy::can_be_compiled(m, comp_level)) { kvn@1623: kvn@1623: if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { kvn@1623: // Give sweeper a chance to keep up with CTW kvn@1623: VM_ForceSafepoint op; kvn@1623: VMThread::execute(&op); kvn@1623: _codecache_sweep_counter = 0; kvn@1623: } duke@435: // Force compilation iignatyev@5032: CompileBroker::compile_method(m, InvocationEntryBci, comp_level, duke@435: methodHandle(), 0, "CTW", THREAD); duke@435: if (HAS_PENDING_EXCEPTION) { never@2564: clear_pending_exception_if_not_oom(CHECK); twisti@4940: tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name()->as_C_string()); twisti@4940: } else { twisti@4940: _compile_the_world_method_counter++; duke@435: } iveresov@3035: if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) { never@1158: // Clobber the first compile and force second tier compilation never@1158: nmethod* nm = m->code(); never@1158: if (nm != NULL) { never@1158: // Throw out the code so that the code cache doesn't fill up never@1158: nm->make_not_entrant(); never@1158: m->clear_code(); never@1158: } iveresov@2138: CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, never@1158: methodHandle(), 0, "CTW", THREAD); never@1158: if (HAS_PENDING_EXCEPTION) { never@2564: clear_pending_exception_if_not_oom(CHECK); twisti@4940: tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name()->as_C_string()); twisti@4940: } else { twisti@4940: _compile_the_world_method_counter++; never@1158: } duke@435: } duke@435: } never@1158: never@1158: nmethod* nm = m->code(); never@1158: if (nm != NULL) { never@1158: // Throw out the code so that the code cache doesn't fill up never@1158: nm->make_not_entrant(); never@1158: m->clear_code(); duke@435: } duke@435: } duke@435: } duke@435: } duke@435: } duke@435: } duke@435: } duke@435: duke@435: #endif //PRODUCT minqi@2459: minqi@2459: // Please keep following two functions at end of this file. With them placed at top or in middle of the file, minqi@2459: // they could get inlined by agressive compiler, an unknown trick, see bug 6966589. minqi@2459: void PerfClassTraceTime::initialize() { minqi@2459: if (!UsePerfData) return; minqi@2459: minqi@2459: if (_eventp != NULL) { minqi@2459: // increment the event counter minqi@2459: _eventp->inc(); minqi@2459: } minqi@2459: minqi@2459: // stop the current active thread-local timer to measure inclusive time minqi@2459: _prev_active_event = -1; minqi@2459: for (int i=0; i < EVENT_TYPE_COUNT; i++) { minqi@2459: if (_timers[i].is_active()) { minqi@2459: assert(_prev_active_event == -1, "should have only one active timer"); minqi@2459: _prev_active_event = i; minqi@2459: _timers[i].stop(); minqi@2459: } minqi@2459: } minqi@2459: minqi@2459: if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { minqi@2459: // start the inclusive timer if not recursively called minqi@2459: _t.start(); minqi@2459: } minqi@2459: minqi@2459: // start thread-local timer of the given event type minqi@2459: if (!_timers[_event_type].is_active()) { minqi@2459: _timers[_event_type].start(); minqi@2459: } minqi@2459: } minqi@2459: minqi@2459: PerfClassTraceTime::~PerfClassTraceTime() { minqi@2459: if (!UsePerfData) return; minqi@2459: minqi@2459: // stop the thread-local timer as the event completes minqi@2459: // and resume the thread-local timer of the event next on the stack minqi@2459: _timers[_event_type].stop(); minqi@2459: jlong selftime = _timers[_event_type].ticks(); minqi@2459: minqi@2459: if (_prev_active_event >= 0) { minqi@2459: _timers[_prev_active_event].start(); minqi@2459: } minqi@2459: minqi@2459: if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; minqi@2459: minqi@2459: // increment the counters only on the leaf call minqi@2459: _t.stop(); minqi@2459: _timep->inc(_t.ticks()); minqi@2459: if (_selftimep != NULL) { minqi@2459: _selftimep->inc(selftime); minqi@2459: } minqi@2459: // add all class loading related event selftime to the accumulated time counter minqi@2459: ClassLoader::perf_accumulated_time()->inc(selftime); minqi@2459: minqi@2459: // reset the timer minqi@2459: _timers[_event_type].reset(); minqi@2459: }