| /* |
| * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/classFileParser.hpp" |
| #include "classfile/classFileStream.hpp" |
| #include "classfile/classLoader.hpp" |
| #include "classfile/classLoaderExt.hpp" |
| #include "classfile/classLoaderData.inline.hpp" |
| #include "classfile/javaClasses.hpp" |
| #if INCLUDE_CDS |
| #include "classfile/sharedPathsMiscInfo.hpp" |
| #include "classfile/sharedClassUtil.hpp" |
| #endif |
| #include "classfile/systemDictionary.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "compiler/compileBroker.hpp" |
| #include "gc_interface/collectedHeap.inline.hpp" |
| #include "interpreter/bytecodeStream.hpp" |
| #include "interpreter/oopMapCache.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "memory/filemap.hpp" |
| #include "memory/generation.hpp" |
| #include "memory/oopFactory.hpp" |
| #include "memory/universe.inline.hpp" |
| #include "oops/instanceKlass.hpp" |
| #include "oops/instanceRefKlass.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "oops/symbol.hpp" |
| #include "prims/jvm_misc.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/compilationPolicy.hpp" |
| #include "runtime/fprofiler.hpp" |
| #include "runtime/handles.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/init.hpp" |
| #include "runtime/interfaceSupport.hpp" |
| #include "runtime/java.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/os.hpp" |
| #include "runtime/threadCritical.hpp" |
| #include "runtime/timer.hpp" |
| #include "services/management.hpp" |
| #include "services/threadService.hpp" |
| #include "utilities/events.hpp" |
| #include "utilities/hashtable.hpp" |
| #include "utilities/hashtable.inline.hpp" |
| |
| // Entry points in zip.dll for loading zip/jar file entries |
| |
| typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg); |
| typedef void (JNICALL *ZipClose_t)(jzfile *zip); |
| typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); |
| typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); |
| typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf); |
| typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n); |
| |
| static ZipOpen_t ZipOpen = NULL; |
| static ZipClose_t ZipClose = NULL; |
| static FindEntry_t FindEntry = NULL; |
| static ReadEntry_t ReadEntry = NULL; |
| static ReadMappedEntry_t ReadMappedEntry = NULL; |
| static GetNextEntry_t GetNextEntry = NULL; |
| static canonicalize_fn_t CanonicalizeEntry = NULL; |
| |
| // Globals |
| |
| PerfCounter* ClassLoader::_perf_accumulated_time = NULL; |
| PerfCounter* ClassLoader::_perf_classes_inited = NULL; |
| PerfCounter* ClassLoader::_perf_class_init_time = NULL; |
| PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; |
| PerfCounter* ClassLoader::_perf_classes_verified = NULL; |
| PerfCounter* ClassLoader::_perf_class_verify_time = NULL; |
| PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; |
| PerfCounter* ClassLoader::_perf_classes_linked = NULL; |
| PerfCounter* ClassLoader::_perf_class_link_time = NULL; |
| PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; |
| PerfCounter* ClassLoader::_perf_class_parse_time = NULL; |
| PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; |
| PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; |
| PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; |
| PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; |
| PerfCounter* ClassLoader::_perf_app_classload_time = NULL; |
| PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; |
| PerfCounter* ClassLoader::_perf_app_classload_count = NULL; |
| PerfCounter* ClassLoader::_perf_define_appclasses = NULL; |
| PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; |
| PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; |
| PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; |
| PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; |
| PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; |
| PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; |
| PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; |
| PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; |
| PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; |
| PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; |
| PerfCounter* ClassLoader::_isUnsyncloadClass = NULL; |
| PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; |
| |
| ClassPathEntry* ClassLoader::_first_entry = NULL; |
| ClassPathEntry* ClassLoader::_last_entry = NULL; |
| int ClassLoader::_num_entries = 0; |
| PackageHashtable* ClassLoader::_package_hash_table = NULL; |
| |
| #if INCLUDE_CDS |
| SharedPathsMiscInfo* ClassLoader::_shared_paths_misc_info = NULL; |
| #endif |
| // helper routines |
| bool string_starts_with(const char* str, const char* str_to_find) { |
| size_t str_len = strlen(str); |
| size_t str_to_find_len = strlen(str_to_find); |
| if (str_to_find_len > str_len) { |
| return false; |
| } |
| return (strncmp(str, str_to_find, str_to_find_len) == 0); |
| } |
| |
| bool string_ends_with(const char* str, const char* str_to_find) { |
| size_t str_len = strlen(str); |
| size_t str_to_find_len = strlen(str_to_find); |
| if (str_to_find_len > str_len) { |
| return false; |
| } |
| return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); |
| } |
| |
| |
| MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) { |
| if (num_meta_package_names == 0) { |
| _meta_package_names = NULL; |
| _num_meta_package_names = 0; |
| } else { |
| _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names, mtClass); |
| _num_meta_package_names = num_meta_package_names; |
| memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*)); |
| } |
| } |
| |
| |
| MetaIndex::~MetaIndex() { |
| FREE_C_HEAP_ARRAY(char*, _meta_package_names, mtClass); |
| } |
| |
| |
| bool MetaIndex::may_contain(const char* class_name) { |
| if ( _num_meta_package_names == 0) { |
| return false; |
| } |
| size_t class_name_len = strlen(class_name); |
| for (int i = 0; i < _num_meta_package_names; i++) { |
| char* pkg = _meta_package_names[i]; |
| size_t pkg_len = strlen(pkg); |
| size_t min_len = MIN2(class_name_len, pkg_len); |
| if (!strncmp(class_name, pkg, min_len)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| |
| ClassPathEntry::ClassPathEntry() { |
| set_next(NULL); |
| } |
| |
| |
| bool ClassPathEntry::is_lazy() { |
| return false; |
| } |
| |
| ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() { |
| _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass); |
| strcpy(_dir, dir); |
| } |
| |
| |
| ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) { |
| // construct full path name |
| char path[JVM_MAXPATHLEN]; |
| if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) { |
| return NULL; |
| } |
| // check if file exists |
| struct stat st; |
| if (os::stat(path, &st) == 0) { |
| #if INCLUDE_CDS |
| if (DumpSharedSpaces) { |
| // We have already check in ClassLoader::check_shared_classpath() that the directory is empty, so |
| // we should never find a file underneath it -- unless user has added a new file while we are running |
| // the dump, in which case let's quit! |
| ShouldNotReachHere(); |
| } |
| #endif |
| // found file, open it |
| int file_handle = os::open(path, 0, 0); |
| if (file_handle != -1) { |
| // read contents into resource array |
| u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); |
| size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); |
| // close file |
| os::close(file_handle); |
| // construct ClassFileStream |
| if (num_read == (size_t)st.st_size) { |
| if (UsePerfData) { |
| ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); |
| } |
| return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated |
| } |
| } |
| } |
| return NULL; |
| } |
| |
| |
| ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() { |
| _zip = zip; |
| _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass); |
| strcpy(_zip_name, zip_name); |
| } |
| |
| ClassPathZipEntry::~ClassPathZipEntry() { |
| if (ZipClose != NULL) { |
| (*ZipClose)(_zip); |
| } |
| FREE_C_HEAP_ARRAY(char, _zip_name, mtClass); |
| } |
| |
| u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) { |
| // enable call to C land |
| JavaThread* thread = JavaThread::current(); |
| ThreadToNativeFromVM ttn(thread); |
| // check whether zip archive contains name |
| jint name_len; |
| jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len); |
| if (entry == NULL) return NULL; |
| u1* buffer; |
| char name_buf[128]; |
| char* filename; |
| if (name_len < 128) { |
| filename = name_buf; |
| } else { |
| filename = NEW_RESOURCE_ARRAY(char, name_len + 1); |
| } |
| |
| // file found, get pointer to the entry in mmapped jar file. |
| if (ReadMappedEntry == NULL || |
| !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { |
| // mmapped access not available, perhaps due to compression, |
| // read contents into resource array |
| int size = (*filesize) + ((nul_terminate) ? 1 : 0); |
| buffer = NEW_RESOURCE_ARRAY(u1, size); |
| if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; |
| } |
| |
| // return result |
| if (nul_terminate) { |
| buffer[*filesize] = 0; |
| } |
| return buffer; |
| } |
| |
| ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) { |
| jint filesize; |
| u1* buffer = open_entry(name, &filesize, false, CHECK_NULL); |
| if (buffer == NULL) { |
| return NULL; |
| } |
| if (UsePerfData) { |
| ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); |
| } |
| return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated |
| } |
| |
| // invoke function for each entry in the zip file |
| void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { |
| JavaThread* thread = JavaThread::current(); |
| HandleMark handle_mark(thread); |
| ThreadToNativeFromVM ttn(thread); |
| for (int n = 0; ; n++) { |
| jzentry * ze = ((*GetNextEntry)(_zip, n)); |
| if (ze == NULL) break; |
| (*f)(ze->name, context); |
| } |
| } |
| |
| LazyClassPathEntry::LazyClassPathEntry(char* path, const struct stat* st, bool throw_exception) : ClassPathEntry() { |
| _path = os::strdup_check_oom(path); |
| _st = *st; |
| _meta_index = NULL; |
| _resolved_entry = NULL; |
| _has_error = false; |
| _throw_exception = throw_exception; |
| } |
| |
| LazyClassPathEntry::~LazyClassPathEntry() { |
| os::free(_path); |
| } |
| |
| bool LazyClassPathEntry::is_jar_file() { |
| return ((_st.st_mode & S_IFREG) == S_IFREG); |
| } |
| |
| ClassPathEntry* LazyClassPathEntry::resolve_entry(TRAPS) { |
| if (_resolved_entry != NULL) { |
| return (ClassPathEntry*) _resolved_entry; |
| } |
| ClassPathEntry* new_entry = NULL; |
| new_entry = ClassLoader::create_class_path_entry(_path, &_st, false, _throw_exception, CHECK_NULL); |
| if (!_throw_exception && new_entry == NULL) { |
| assert(!HAS_PENDING_EXCEPTION, "must be"); |
| return NULL; |
| } |
| { |
| ThreadCritical tc; |
| if (_resolved_entry == NULL) { |
| _resolved_entry = new_entry; |
| return new_entry; |
| } |
| } |
| assert(_resolved_entry != NULL, "bug in MT-safe resolution logic"); |
| delete new_entry; |
| return (ClassPathEntry*) _resolved_entry; |
| } |
| |
| ClassFileStream* LazyClassPathEntry::open_stream(const char* name, TRAPS) { |
| if (_meta_index != NULL && |
| !_meta_index->may_contain(name)) { |
| return NULL; |
| } |
| if (_has_error) { |
| return NULL; |
| } |
| ClassPathEntry* cpe = resolve_entry(THREAD); |
| if (cpe == NULL) { |
| _has_error = true; |
| return NULL; |
| } else { |
| return cpe->open_stream(name, THREAD); |
| } |
| } |
| |
| bool LazyClassPathEntry::is_lazy() { |
| return true; |
| } |
| |
| u1* LazyClassPathEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) { |
| if (_has_error) { |
| return NULL; |
| } |
| ClassPathEntry* cpe = resolve_entry(THREAD); |
| if (cpe == NULL) { |
| _has_error = true; |
| return NULL; |
| } else if (cpe->is_jar_file()) { |
| return ((ClassPathZipEntry*)cpe)->open_entry(name, filesize, nul_terminate,THREAD); |
| } else { |
| ShouldNotReachHere(); |
| *filesize = 0; |
| return NULL; |
| } |
| } |
| |
| static void print_meta_index(LazyClassPathEntry* entry, |
| GrowableArray<char*>& meta_packages) { |
| tty->print("[Meta index for %s=", entry->name()); |
| for (int i = 0; i < meta_packages.length(); i++) { |
| if (i > 0) tty->print(" "); |
| tty->print("%s", meta_packages.at(i)); |
| } |
| tty->print_cr("]"); |
| } |
| |
| #if INCLUDE_CDS |
| void ClassLoader::exit_with_path_failure(const char* error, const char* message) { |
| assert(DumpSharedSpaces, "only called at dump time"); |
| tty->print_cr("Hint: enable -XX:+TraceClassPaths to diagnose the failure"); |
| vm_exit_during_initialization(error, message); |
| } |
| #endif |
| |
| void ClassLoader::trace_class_path(const char* msg, const char* name) { |
| if (!TraceClassPaths) { |
| return; |
| } |
| |
| if (msg) { |
| tty->print("%s", msg); |
| } |
| if (name) { |
| if (strlen(name) < 256) { |
| tty->print("%s", name); |
| } else { |
| // For very long paths, we need to print each character separately, |
| // as print_cr() has a length limit |
| while (name[0] != '\0') { |
| tty->print("%c", name[0]); |
| name++; |
| } |
| } |
| } |
| if (msg && msg[0] == '[') { |
| tty->print_cr("]"); |
| } else { |
| tty->cr(); |
| } |
| } |
| |
| void ClassLoader::setup_bootstrap_meta_index() { |
| // Set up meta index which allows us to open boot jars lazily if |
| // class data sharing is enabled |
| const char* meta_index_path = Arguments::get_meta_index_path(); |
| const char* meta_index_dir = Arguments::get_meta_index_dir(); |
| setup_meta_index(meta_index_path, meta_index_dir, 0); |
| } |
| |
| void ClassLoader::setup_meta_index(const char* meta_index_path, const char* meta_index_dir, int start_index) { |
| const char* known_version = "% VERSION 2"; |
| FILE* file = fopen(meta_index_path, "r"); |
| int line_no = 0; |
| #if INCLUDE_CDS |
| if (DumpSharedSpaces) { |
| if (file != NULL) { |
| _shared_paths_misc_info->add_required_file(meta_index_path); |
| } else { |
| _shared_paths_misc_info->add_nonexist_path(meta_index_path); |
| } |
| } |
| #endif |
| if (file != NULL) { |
| ResourceMark rm; |
| LazyClassPathEntry* cur_entry = NULL; |
| GrowableArray<char*> boot_class_path_packages(10); |
| char package_name[256]; |
| bool skipCurrentJar = false; |
| while (fgets(package_name, sizeof(package_name), file) != NULL) { |
| ++line_no; |
| // Remove trailing newline |
| package_name[strlen(package_name) - 1] = '\0'; |
| switch(package_name[0]) { |
| case '%': |
| { |
| if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) { |
| if (TraceClassLoading && Verbose) { |
| tty->print("[Unsupported meta index version]"); |
| } |
| fclose(file); |
| return; |
| } |
| } |
| |
| // These directives indicate jar files which contain only |
| // classes, only non-classfile resources, or a combination of |
| // the two. See src/share/classes/sun/misc/MetaIndex.java and |
| // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE |
| // workspace. |
| case '#': |
| case '!': |
| case '@': |
| { |
| // Hand off current packages to current lazy entry (if any) |
| if ((cur_entry != NULL) && |
| (boot_class_path_packages.length() > 0)) { |
| if ((TraceClassLoading || TraceClassPaths) && Verbose) { |
| print_meta_index(cur_entry, boot_class_path_packages); |
| } |
| MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), |
| boot_class_path_packages.length()); |
| cur_entry->set_meta_index(index); |
| } |
| cur_entry = NULL; |
| boot_class_path_packages.clear(); |
| |
| // Find lazy entry corresponding to this jar file |
| int count = 0; |
| for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next(), count++) { |
| if (count >= start_index && |
| entry->is_lazy() && |
| string_starts_with(entry->name(), meta_index_dir) && |
| string_ends_with(entry->name(), &package_name[2])) { |
| cur_entry = (LazyClassPathEntry*) entry; |
| break; |
| } |
| } |
| |
| // If the first character is '@', it indicates the following jar |
| // file is a resource only jar file in which case, we should skip |
| // reading the subsequent entries since the resource loading is |
| // totally handled by J2SE side. |
| if (package_name[0] == '@') { |
| if (cur_entry != NULL) { |
| cur_entry->set_meta_index(new MetaIndex(NULL, 0)); |
| } |
| cur_entry = NULL; |
| skipCurrentJar = true; |
| } else { |
| skipCurrentJar = false; |
| } |
| |
| break; |
| } |
| |
| default: |
| { |
| if (!skipCurrentJar && cur_entry != NULL) { |
| char* new_name = os::strdup_check_oom(package_name); |
| boot_class_path_packages.append(new_name); |
| } |
| } |
| } |
| } |
| // Hand off current packages to current lazy entry (if any) |
| if ((cur_entry != NULL) && |
| (boot_class_path_packages.length() > 0)) { |
| if ((TraceClassLoading || TraceClassPaths) && Verbose) { |
| print_meta_index(cur_entry, boot_class_path_packages); |
| } |
| MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), |
| boot_class_path_packages.length()); |
| cur_entry->set_meta_index(index); |
| } |
| fclose(file); |
| } |
| } |
| |
| #if INCLUDE_CDS |
| void ClassLoader::check_shared_classpath(const char *path) { |
| if (strcmp(path, "") == 0) { |
| exit_with_path_failure("Cannot have empty path in archived classpaths", NULL); |
| } |
| |
| struct stat st; |
| if (os::stat(path, &st) == 0) { |
| if ((st.st_mode & S_IFREG) != S_IFREG) { // is directory |
| if (!os::dir_is_empty(path)) { |
| tty->print_cr("Error: non-empty directory '%s'", path); |
| exit_with_path_failure("CDS allows only empty directories in archived classpaths", NULL); |
| } |
| } |
| } |
| } |
| #endif |
| |
| void ClassLoader::setup_bootstrap_search_path() { |
| assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); |
| char* sys_class_path = os::strdup_check_oom(Arguments::get_sysclasspath()); |
| if (!PrintSharedArchiveAndExit) { |
| trace_class_path("[Bootstrap loader class path=", sys_class_path); |
| } |
| #if INCLUDE_CDS |
| if (DumpSharedSpaces) { |
| _shared_paths_misc_info->add_boot_classpath(Arguments::get_sysclasspath()); |
| } |
| #endif |
| setup_search_path(sys_class_path); |
| os::free(sys_class_path); |
| } |
| |
| #if INCLUDE_CDS |
| int ClassLoader::get_shared_paths_misc_info_size() { |
| return _shared_paths_misc_info->get_used_bytes(); |
| } |
| |
| void* ClassLoader::get_shared_paths_misc_info() { |
| return _shared_paths_misc_info->buffer(); |
| } |
| |
| bool ClassLoader::check_shared_paths_misc_info(void *buf, int size) { |
| SharedPathsMiscInfo* checker = SharedClassUtil::allocate_shared_paths_misc_info((char*)buf, size); |
| bool result = checker->check(); |
| delete checker; |
| return result; |
| } |
| #endif |
| |
| void ClassLoader::setup_search_path(char *class_path) { |
| int offset = 0; |
| int len = (int)strlen(class_path); |
| int end = 0; |
| |
| // Iterate over class path entries |
| for (int start = 0; start < len; start = end) { |
| while (class_path[end] && class_path[end] != os::path_separator()[0]) { |
| end++; |
| } |
| EXCEPTION_MARK; |
| ResourceMark rm(THREAD); |
| char* path = NEW_RESOURCE_ARRAY(char, end - start + 1); |
| strncpy(path, &class_path[start], end - start); |
| path[end - start] = '\0'; |
| update_class_path_entry_list(path, false); |
| #if INCLUDE_CDS |
| if (DumpSharedSpaces) { |
| check_shared_classpath(path); |
| } |
| #endif |
| while (class_path[end] == os::path_separator()[0]) { |
| end++; |
| } |
| } |
| } |
| |
| ClassPathEntry* ClassLoader::create_class_path_entry(char *path, const struct stat* st, |
| bool lazy, bool throw_exception, TRAPS) { |
| JavaThread* thread = JavaThread::current(); |
| if (lazy) { |
| return new LazyClassPathEntry(path, st, throw_exception); |
| } |
| ClassPathEntry* new_entry = NULL; |
| if ((st->st_mode & S_IFREG) == S_IFREG) { |
| // Regular file, should be a zip file |
| // Canonicalized filename |
| char canonical_path[JVM_MAXPATHLEN]; |
| if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { |
| // This matches the classic VM |
| if (throw_exception) { |
| THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL); |
| } else { |
| return NULL; |
| } |
| } |
| char* error_msg = NULL; |
| jzfile* zip; |
| { |
| // enable call to C land |
| ThreadToNativeFromVM ttn(thread); |
| HandleMark hm(thread); |
| zip = (*ZipOpen)(canonical_path, &error_msg); |
| } |
| if (zip != NULL && error_msg == NULL) { |
| new_entry = new ClassPathZipEntry(zip, path); |
| if (TraceClassLoading || TraceClassPaths) { |
| tty->print_cr("[Opened %s]", path); |
| } |
| } else { |
| ResourceMark rm(thread); |
| char *msg; |
| if (error_msg == NULL) { |
| msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; |
| jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); |
| } else { |
| int len = (int)(strlen(path) + strlen(error_msg) + 128); |
| msg = NEW_RESOURCE_ARRAY(char, len); ; |
| jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); |
| } |
| if (throw_exception) { |
| THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL); |
| } else { |
| return NULL; |
| } |
| } |
| } else { |
| // Directory |
| new_entry = new ClassPathDirEntry(path); |
| if (TraceClassLoading || TraceClassPaths) { |
| tty->print_cr("[Path %s]", path); |
| } |
| } |
| return new_entry; |
| } |
| |
| |
| // Create a class path zip entry for a given path (return NULL if not found |
| // or zip/JAR file cannot be opened) |
| ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) { |
| // check for a regular file |
| struct stat st; |
| if (os::stat(path, &st) == 0) { |
| if ((st.st_mode & S_IFREG) == S_IFREG) { |
| char orig_path[JVM_MAXPATHLEN]; |
| char canonical_path[JVM_MAXPATHLEN]; |
| |
| strcpy(orig_path, path); |
| if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) { |
| char* error_msg = NULL; |
| jzfile* zip; |
| { |
| // enable call to C land |
| JavaThread* thread = JavaThread::current(); |
| ThreadToNativeFromVM ttn(thread); |
| HandleMark hm(thread); |
| zip = (*ZipOpen)(canonical_path, &error_msg); |
| } |
| if (zip != NULL && error_msg == NULL) { |
| // create using canonical path |
| return new ClassPathZipEntry(zip, canonical_path); |
| } |
| } |
| } |
| } |
| return NULL; |
| } |
| |
| // returns true if entry already on class path |
| bool ClassLoader::contains_entry(ClassPathEntry *entry) { |
| ClassPathEntry* e = _first_entry; |
| while (e != NULL) { |
| // assume zip entries have been canonicalized |
| if (strcmp(entry->name(), e->name()) == 0) { |
| return true; |
| } |
| e = e->next(); |
| } |
| return false; |
| } |
| |
| void ClassLoader::add_to_list(ClassPathEntry *new_entry) { |
| if (new_entry != NULL) { |
| if (_last_entry == NULL) { |
| _first_entry = _last_entry = new_entry; |
| } else { |
| _last_entry->set_next(new_entry); |
| _last_entry = new_entry; |
| } |
| } |
| _num_entries ++; |
| } |
| |
| // Returns true IFF the file/dir exists and the entry was successfully created. |
| bool ClassLoader::update_class_path_entry_list(char *path, |
| bool check_for_duplicates, |
| bool throw_exception) { |
| struct stat st; |
| if (os::stat(path, &st) == 0) { |
| // File or directory found |
| ClassPathEntry* new_entry = NULL; |
| Thread* THREAD = Thread::current(); |
| new_entry = create_class_path_entry(path, &st, LazyBootClassLoader, throw_exception, CHECK_(false)); |
| if (new_entry == NULL) { |
| return false; |
| } |
| // The kernel VM adds dynamically to the end of the classloader path and |
| // doesn't reorder the bootclasspath which would break java.lang.Package |
| // (see PackageInfo). |
| // Add new entry to linked list |
| if (!check_for_duplicates || !contains_entry(new_entry)) { |
| ClassLoaderExt::add_class_path_entry(path, check_for_duplicates, new_entry); |
| } |
| return true; |
| } else { |
| #if INCLUDE_CDS |
| if (DumpSharedSpaces) { |
| _shared_paths_misc_info->add_nonexist_path(path); |
| } |
| return false; |
| #endif |
| } |
| } |
| |
| void ClassLoader::print_bootclasspath() { |
| ClassPathEntry* e = _first_entry; |
| tty->print("[bootclasspath= "); |
| while (e != NULL) { |
| tty->print("%s ;", e->name()); |
| e = e->next(); |
| } |
| tty->print_cr("]"); |
| } |
| |
| void ClassLoader::load_zip_library() { |
| assert(ZipOpen == NULL, "should not load zip library twice"); |
| // First make sure native library is loaded |
| os::native_java_library(); |
| // Load zip library |
| char path[JVM_MAXPATHLEN]; |
| char ebuf[1024]; |
| void* handle = NULL; |
| if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip")) { |
| handle = os::dll_load(path, ebuf, sizeof ebuf); |
| } |
| if (handle == NULL) { |
| vm_exit_during_initialization("Unable to load ZIP library", path); |
| } |
| // Lookup zip entry points |
| ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); |
| ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); |
| FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); |
| ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); |
| ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry")); |
| GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); |
| |
| // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL |
| if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) { |
| vm_exit_during_initialization("Corrupted ZIP library", path); |
| } |
| |
| // Lookup canonicalize entry in libjava.dll |
| void *javalib_handle = os::native_java_library(); |
| CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); |
| // This lookup only works on 1.3. Do not check for non-null here |
| } |
| |
| // PackageInfo data exists in order to support the java.lang.Package |
| // class. A Package object provides information about a java package |
| // (version, vendor, etc.) which originates in the manifest of the jar |
| // file supplying the package. For application classes, the ClassLoader |
| // object takes care of this. |
| |
| // For system (boot) classes, the Java code in the Package class needs |
| // to be able to identify which source jar file contained the boot |
| // class, so that it can extract the manifest from it. This table |
| // identifies java packages with jar files in the boot classpath. |
| |
| // Because the boot classpath cannot change, the classpath index is |
| // sufficient to identify the source jar file or directory. (Since |
| // directories have no manifests, the directory name is not required, |
| // but is available.) |
| |
| // When using sharing -- the pathnames of entries in the boot classpath |
| // may not be the same at runtime as they were when the archive was |
| // created (NFS, Samba, etc.). The actual files and directories named |
| // in the classpath must be the same files, in the same order, even |
| // though the exact name is not the same. |
| |
| class PackageInfo: public BasicHashtableEntry<mtClass> { |
| public: |
| const char* _pkgname; // Package name |
| int _classpath_index; // Index of directory or JAR file loaded from |
| |
| PackageInfo* next() { |
| return (PackageInfo*)BasicHashtableEntry<mtClass>::next(); |
| } |
| |
| const char* pkgname() { return _pkgname; } |
| void set_pkgname(char* pkgname) { _pkgname = pkgname; } |
| |
| const char* filename() { |
| return ClassLoader::classpath_entry(_classpath_index)->name(); |
| } |
| |
| void set_index(int index) { |
| _classpath_index = index; |
| } |
| }; |
| |
| |
| class PackageHashtable : public BasicHashtable<mtClass> { |
| private: |
| inline unsigned int compute_hash(const char *s, int n) { |
| unsigned int val = 0; |
| while (--n >= 0) { |
| val = *s++ + 31 * val; |
| } |
| return val; |
| } |
| |
| PackageInfo* bucket(int index) { |
| return (PackageInfo*)BasicHashtable<mtClass>::bucket(index); |
| } |
| |
| PackageInfo* get_entry(int index, unsigned int hash, |
| const char* pkgname, size_t n) { |
| for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) { |
| if (pp->hash() == hash && |
| strncmp(pkgname, pp->pkgname(), n) == 0 && |
| pp->pkgname()[n] == '\0') { |
| return pp; |
| } |
| } |
| return NULL; |
| } |
| |
| public: |
| PackageHashtable(int table_size) |
| : BasicHashtable<mtClass>(table_size, sizeof(PackageInfo)) {} |
| |
| PackageHashtable(int table_size, HashtableBucket<mtClass>* t, int number_of_entries) |
| : BasicHashtable<mtClass>(table_size, sizeof(PackageInfo), t, number_of_entries) {} |
| |
| PackageInfo* get_entry(const char* pkgname, int n) { |
| unsigned int hash = compute_hash(pkgname, n); |
| return get_entry(hash_to_index(hash), hash, pkgname, n); |
| } |
| |
| PackageInfo* new_entry(char* pkgname, int n) { |
| unsigned int hash = compute_hash(pkgname, n); |
| PackageInfo* pp; |
| pp = (PackageInfo*)BasicHashtable<mtClass>::new_entry(hash); |
| pp->set_pkgname(pkgname); |
| return pp; |
| } |
| |
| void add_entry(PackageInfo* pp) { |
| int index = hash_to_index(pp->hash()); |
| BasicHashtable<mtClass>::add_entry(index, pp); |
| } |
| |
| void copy_pkgnames(const char** packages) { |
| int n = 0; |
| for (int i = 0; i < table_size(); ++i) { |
| for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) { |
| packages[n++] = pp->pkgname(); |
| } |
| } |
| assert(n == number_of_entries(), "just checking"); |
| } |
| |
| CDS_ONLY(void copy_table(char** top, char* end, PackageHashtable* table);) |
| }; |
| |
| #if INCLUDE_CDS |
| void PackageHashtable::copy_table(char** top, char* end, |
| PackageHashtable* table) { |
| // Copy (relocate) the table to the shared space. |
| BasicHashtable<mtClass>::copy_table(top, end); |
| |
| // Calculate the space needed for the package name strings. |
| int i; |
| intptr_t* tableSize = (intptr_t*)(*top); |
| *top += sizeof(intptr_t); // For table size |
| char* tableStart = *top; |
| |
| for (i = 0; i < table_size(); ++i) { |
| for (PackageInfo* pp = table->bucket(i); |
| pp != NULL; |
| pp = pp->next()) { |
| int n1 = (int)(strlen(pp->pkgname()) + 1); |
| if (*top + n1 >= end) { |
| report_out_of_shared_space(SharedMiscData); |
| } |
| pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1)); |
| *top += n1; |
| } |
| } |
| *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord)); |
| if (*top >= end) { |
| report_out_of_shared_space(SharedMiscData); |
| } |
| |
| // Write table size |
| intptr_t len = *top - (char*)tableStart; |
| *tableSize = len; |
| } |
| |
| |
| void ClassLoader::copy_package_info_buckets(char** top, char* end) { |
| _package_hash_table->copy_buckets(top, end); |
| } |
| |
| void ClassLoader::copy_package_info_table(char** top, char* end) { |
| _package_hash_table->copy_table(top, end, _package_hash_table); |
| } |
| #endif |
| |
| PackageInfo* ClassLoader::lookup_package(const char *pkgname) { |
| const char *cp = strrchr(pkgname, '/'); |
| if (cp != NULL) { |
| // Package prefix found |
| int n = cp - pkgname + 1; |
| return _package_hash_table->get_entry(pkgname, n); |
| } |
| return NULL; |
| } |
| |
| |
| bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) { |
| assert(pkgname != NULL, "just checking"); |
| // Bootstrap loader no longer holds system loader lock obj serializing |
| // load_instance_class and thereby add_package |
| { |
| MutexLocker ml(PackageTable_lock, THREAD); |
| // First check for previously loaded entry |
| PackageInfo* pp = lookup_package(pkgname); |
| if (pp != NULL) { |
| // Existing entry found, check source of package |
| pp->set_index(classpath_index); |
| return true; |
| } |
| |
| const char *cp = strrchr(pkgname, '/'); |
| if (cp != NULL) { |
| // Package prefix found |
| int n = cp - pkgname + 1; |
| |
| char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1, mtClass); |
| if (new_pkgname == NULL) { |
| return false; |
| } |
| |
| memcpy(new_pkgname, pkgname, n); |
| new_pkgname[n] = '\0'; |
| pp = _package_hash_table->new_entry(new_pkgname, n); |
| pp->set_index(classpath_index); |
| |
| // Insert into hash table |
| _package_hash_table->add_entry(pp); |
| } |
| return true; |
| } |
| } |
| |
| |
| oop ClassLoader::get_system_package(const char* name, TRAPS) { |
| PackageInfo* pp; |
| { |
| MutexLocker ml(PackageTable_lock, THREAD); |
| pp = lookup_package(name); |
| } |
| if (pp == NULL) { |
| return NULL; |
| } else { |
| Handle p = java_lang_String::create_from_str(pp->filename(), THREAD); |
| return p(); |
| } |
| } |
| |
| |
| objArrayOop ClassLoader::get_system_packages(TRAPS) { |
| ResourceMark rm(THREAD); |
| int nof_entries; |
| const char** packages; |
| { |
| MutexLocker ml(PackageTable_lock, THREAD); |
| // Allocate resource char* array containing package names |
| nof_entries = _package_hash_table->number_of_entries(); |
| if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) { |
| return NULL; |
| } |
| _package_hash_table->copy_pkgnames(packages); |
| } |
| // Allocate objArray and fill with java.lang.String |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| nof_entries, CHECK_0); |
| objArrayHandle result(THREAD, r); |
| for (int i = 0; i < nof_entries; i++) { |
| Handle str = java_lang_String::create_from_str(packages[i], CHECK_0); |
| result->obj_at_put(i, str()); |
| } |
| |
| return result(); |
| } |
| |
| |
| instanceKlassHandle ClassLoader::load_classfile(Symbol* h_name, TRAPS) { |
| ResourceMark rm(THREAD); |
| const char* class_name = h_name->as_C_string(); |
| EventMark m("loading class %s", class_name); |
| ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); |
| |
| stringStream st; |
| // st.print() uses too much stack space while handling a StackOverflowError |
| // st.print("%s.class", h_name->as_utf8()); |
| st.print_raw(h_name->as_utf8()); |
| st.print_raw(".class"); |
| const char* file_name = st.as_string(); |
| ClassLoaderExt::Context context(class_name, file_name, THREAD); |
| |
| // Lookup stream for parsing .class file |
| ClassFileStream* stream = NULL; |
| int classpath_index = 0; |
| ClassPathEntry* e = NULL; |
| instanceKlassHandle h; |
| { |
| PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(), |
| ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(), |
| PerfClassTraceTime::CLASS_LOAD); |
| e = _first_entry; |
| while (e != NULL) { |
| stream = e->open_stream(file_name, CHECK_NULL); |
| if (!context.check(stream, classpath_index)) { |
| return h; // NULL |
| } |
| if (stream != NULL) { |
| break; |
| } |
| e = e->next(); |
| ++classpath_index; |
| } |
| } |
| |
| if (stream != NULL) { |
| // class file found, parse it |
| ClassFileParser parser(stream); |
| ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); |
| Handle protection_domain; |
| TempNewSymbol parsed_name = NULL; |
| instanceKlassHandle result = parser.parseClassFile(h_name, |
| loader_data, |
| protection_domain, |
| parsed_name, |
| context.should_verify(classpath_index), |
| THREAD); |
| if (HAS_PENDING_EXCEPTION) { |
| ResourceMark rm; |
| if (DumpSharedSpaces) { |
| tty->print_cr("Preload Error: Failed to load %s", class_name); |
| } |
| return h; |
| } |
| h = context.record_result(classpath_index, e, result, THREAD); |
| } else { |
| if (DumpSharedSpaces) { |
| tty->print_cr("Preload Error: Cannot find %s", class_name); |
| } |
| } |
| |
| return h; |
| } |
| |
| |
| void ClassLoader::create_package_info_table(HashtableBucket<mtClass> *t, int length, |
| int number_of_entries) { |
| assert(_package_hash_table == NULL, "One package info table allowed."); |
| assert(length == package_hash_table_size * sizeof(HashtableBucket<mtClass>), |
| "bad shared package info size."); |
| _package_hash_table = new PackageHashtable(package_hash_table_size, t, |
| number_of_entries); |
| } |
| |
| |
| void ClassLoader::create_package_info_table() { |
| assert(_package_hash_table == NULL, "shouldn't have one yet"); |
| _package_hash_table = new PackageHashtable(package_hash_table_size); |
| } |
| |
| |
| // Initialize the class loader's access to methods in libzip. Parse and |
| // process the boot classpath into a list ClassPathEntry objects. Once |
| // this list has been created, it must not change order (see class PackageInfo) |
| // it can be appended to and is by jvmti and the kernel vm. |
| |
| void ClassLoader::initialize() { |
| assert(_package_hash_table == NULL, "should have been initialized by now."); |
| EXCEPTION_MARK; |
| |
| if (UsePerfData) { |
| // jvmstat performance counters |
| NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); |
| NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); |
| NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); |
| NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); |
| NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); |
| NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); |
| NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); |
| NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); |
| NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); |
| NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); |
| |
| NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); |
| NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); |
| NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); |
| NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); |
| NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); |
| NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); |
| NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); |
| NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); |
| NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); |
| NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); |
| NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); |
| NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); |
| NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); |
| |
| |
| // The following performance counters are added for measuring the impact |
| // of the bug fix of 6365597. They are mainly focused on finding out |
| // the behavior of system & user-defined classloader lock, whether |
| // ClassLoader.loadClass/findClass is being called synchronized or not. |
| // Also two additional counters are created to see whether 'UnsyncloadClass' |
| // flag is being set or not and how many times load_instance_class call |
| // fails with linkageError etc. |
| NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, |
| "systemLoaderLockContentionRate"); |
| NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, |
| "nonSystemLoaderLockContentionRate"); |
| NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, |
| "jvmFindLoadedClassNoLockCalls"); |
| NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, |
| "jvmDefineClassNoLockCalls"); |
| |
| NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, |
| "jniDefineClassNoLockCalls"); |
| |
| NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, |
| "unsafeDefineClassCalls"); |
| |
| NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); |
| NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, |
| "loadInstanceClassFailRate"); |
| |
| // increment the isUnsyncloadClass counter if UnsyncloadClass is set. |
| if (UnsyncloadClass) { |
| _isUnsyncloadClass->inc(); |
| } |
| } |
| |
| // lookup zip library entry points |
| load_zip_library(); |
| #if INCLUDE_CDS |
| // initialize search path |
| if (DumpSharedSpaces) { |
| _shared_paths_misc_info = SharedClassUtil::allocate_shared_paths_misc_info(); |
| } |
| #endif |
| setup_bootstrap_search_path(); |
| if (LazyBootClassLoader) { |
| // set up meta index which makes boot classpath initialization lazier |
| setup_bootstrap_meta_index(); |
| } |
| } |
| |
| #if INCLUDE_CDS |
| void ClassLoader::initialize_shared_path() { |
| if (DumpSharedSpaces) { |
| ClassLoaderExt::setup_search_paths(); |
| _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check() |
| } |
| } |
| #endif |
| |
| jlong ClassLoader::classloader_time_ms() { |
| return UsePerfData ? |
| Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; |
| } |
| |
| jlong ClassLoader::class_init_count() { |
| return UsePerfData ? _perf_classes_inited->get_value() : -1; |
| } |
| |
| jlong ClassLoader::class_init_time_ms() { |
| return UsePerfData ? |
| Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; |
| } |
| |
| jlong ClassLoader::class_verify_time_ms() { |
| return UsePerfData ? |
| Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; |
| } |
| |
| jlong ClassLoader::class_link_count() { |
| return UsePerfData ? _perf_classes_linked->get_value() : -1; |
| } |
| |
| jlong ClassLoader::class_link_time_ms() { |
| return UsePerfData ? |
| Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; |
| } |
| |
| int ClassLoader::compute_Object_vtable() { |
| // hardwired for JDK1.2 -- would need to duplicate class file parsing |
| // code to determine actual value from file |
| // Would be value '11' if finals were in vtable |
| int JDK_1_2_Object_vtable_size = 5; |
| return JDK_1_2_Object_vtable_size * vtableEntry::size(); |
| } |
| |
| |
| void classLoader_init() { |
| ClassLoader::initialize(); |
| } |
| |
| |
| bool ClassLoader::get_canonical_path(char* orig, char* out, int len) { |
| assert(orig != NULL && out != NULL && len > 0, "bad arguments"); |
| if (CanonicalizeEntry != NULL) { |
| JNIEnv* env = JavaThread::current()->jni_environment(); |
| if ((CanonicalizeEntry)(env, os::native_path(orig), out, len) < 0) { |
| return false; |
| } |
| } else { |
| // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing |
| strncpy(out, orig, len); |
| out[len - 1] = '\0'; |
| } |
| return true; |
| } |
| |
| #ifndef PRODUCT |
| |
| void ClassLoader::verify() { |
| _package_hash_table->verify(); |
| } |
| |
| |
| // CompileTheWorld |
| // |
| // Iterates over all class path entries and forces compilation of all methods |
| // in all classes found. Currently, only zip/jar archives are searched. |
| // |
| // The classes are loaded by the Java level bootstrap class loader, and the |
| // initializer is called. If DelayCompilationDuringStartup is true (default), |
| // the interpreter will run the initialization code. Note that forcing |
| // initialization in this way could potentially lead to initialization order |
| // problems, in which case we could just force the initialization bit to be set. |
| |
| |
| // We need to iterate over the contents of a zip/jar file, so we replicate the |
| // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, |
| // since jzfile already has a void* definition. |
| // |
| // Note that this is only used in debug mode. |
| // |
| // HotSpot integration note: |
| // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build |
| |
| |
| // JDK 1.3 version |
| typedef struct real_jzentry { /* Zip file entry */ |
| char *name; /* entry name */ |
| jint time; /* modification time */ |
| jint size; /* size of uncompressed data */ |
| jint csize; /* size of compressed data (zero if uncompressed) */ |
| jint crc; /* crc of uncompressed data */ |
| char *comment; /* optional zip file comment */ |
| jbyte *extra; /* optional extra data */ |
| jint pos; /* position of LOC header (if negative) or data */ |
| } real_jzentry; |
| |
| typedef struct real_jzfile { /* Zip file */ |
| char *name; /* zip file name */ |
| jint refs; /* number of active references */ |
| jint fd; /* open file descriptor */ |
| void *lock; /* read lock */ |
| char *comment; /* zip file comment */ |
| char *msg; /* zip error message */ |
| void *entries; /* array of hash cells */ |
| jint total; /* total number of entries */ |
| unsigned short *table; /* Hash chain heads: indexes into entries */ |
| jint tablelen; /* number of hash eads */ |
| real_jzfile *next; /* next zip file in search list */ |
| jzentry *cache; /* we cache the most recently freed jzentry */ |
| /* Information on metadata names in META-INF directory */ |
| char **metanames; /* array of meta names (may have null names) */ |
| jint metacount; /* number of slots in metanames array */ |
| /* If there are any per-entry comments, they are in the comments array */ |
| char **comments; |
| } real_jzfile; |
| |
| void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { |
| // For now we only compile all methods in all classes in zip/jar files |
| tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); |
| tty->cr(); |
| } |
| |
| |
| bool ClassPathDirEntry::is_rt_jar() { |
| return false; |
| } |
| |
| void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { |
| real_jzfile* zip = (real_jzfile*) _zip; |
| tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); |
| tty->cr(); |
| // Iterate over all entries in zip file |
| for (int n = 0; ; n++) { |
| real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n)); |
| if (ze == NULL) break; |
| ClassLoader::compile_the_world_in(ze->name, loader, CHECK); |
| } |
| if (HAS_PENDING_EXCEPTION) { |
| if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { |
| CLEAR_PENDING_EXCEPTION; |
| tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); |
| tty->print_cr("Increase class metadata storage if a limit was set"); |
| } else { |
| tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); |
| } |
| } |
| } |
| |
| bool ClassPathZipEntry::is_rt_jar() { |
| real_jzfile* zip = (real_jzfile*) _zip; |
| int len = (int)strlen(zip->name); |
| // Check whether zip name ends in "rt.jar" |
| // This will match other archives named rt.jar as well, but this is |
| // only used for debugging. |
| return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); |
| } |
| |
| void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) { |
| ClassPathEntry* cpe = resolve_entry(THREAD); |
| if (cpe != NULL) { |
| cpe->compile_the_world(loader, CHECK); |
| } |
| } |
| |
| bool LazyClassPathEntry::is_rt_jar() { |
| Thread* THREAD = Thread::current(); |
| ClassPathEntry* cpe = resolve_entry(THREAD); |
| return (cpe != NULL) ? cpe->is_jar_file() : false; |
| } |
| |
| void ClassLoader::compile_the_world() { |
| EXCEPTION_MARK; |
| HandleMark hm(THREAD); |
| ResourceMark rm(THREAD); |
| // Make sure we don't run with background compilation |
| BackgroundCompilation = false; |
| // Find bootstrap loader |
| Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); |
| // Iterate over all bootstrap class path entries |
| ClassPathEntry* e = _first_entry; |
| jlong start = os::javaTimeMillis(); |
| while (e != NULL) { |
| // We stop at rt.jar, unless it is the first bootstrap path entry |
| if (e->is_rt_jar() && e != _first_entry) break; |
| e->compile_the_world(system_class_loader, CATCH); |
| e = e->next(); |
| } |
| jlong end = os::javaTimeMillis(); |
| tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)", |
| _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start)); |
| { |
| // Print statistics as if before normal exit: |
| extern void print_statistics(); |
| print_statistics(); |
| } |
| vm_exit(0); |
| } |
| |
| int ClassLoader::_compile_the_world_class_counter = 0; |
| int ClassLoader::_compile_the_world_method_counter = 0; |
| static int _codecache_sweep_counter = 0; |
| |
| // Filter out all exceptions except OOMs |
| static void clear_pending_exception_if_not_oom(TRAPS) { |
| if (HAS_PENDING_EXCEPTION && |
| !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { |
| CLEAR_PENDING_EXCEPTION; |
| } |
| // The CHECK at the caller will propagate the exception out |
| } |
| |
| /** |
| * Returns if the given method should be compiled when doing compile-the-world. |
| * |
| * TODO: This should be a private method in a CompileTheWorld class. |
| */ |
| static bool can_be_compiled(methodHandle m, int comp_level) { |
| assert(CompileTheWorld, "must be"); |
| |
| // It's not valid to compile a native wrapper for MethodHandle methods |
| // that take a MemberName appendix since the bytecode signature is not |
| // correct. |
| vmIntrinsics::ID iid = m->intrinsic_id(); |
| if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) { |
| return false; |
| } |
| |
| return CompilationPolicy::can_be_compiled(m, comp_level); |
| } |
| |
| void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { |
| int len = (int)strlen(name); |
| if (len > 6 && strcmp(".class", name + len - 6) == 0) { |
| // We have a .class file |
| char buffer[2048]; |
| strncpy(buffer, name, len - 6); |
| buffer[len-6] = 0; |
| // If the file has a period after removing .class, it's not really a |
| // valid class file. The class loader will check everything else. |
| if (strchr(buffer, '.') == NULL) { |
| _compile_the_world_class_counter++; |
| if (_compile_the_world_class_counter > CompileTheWorldStopAt) return; |
| |
| // Construct name without extension |
| TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK); |
| // Use loader to load and initialize class |
| Klass* ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); |
| instanceKlassHandle k (THREAD, ik); |
| if (k.not_null() && !HAS_PENDING_EXCEPTION) { |
| k->initialize(THREAD); |
| } |
| bool exception_occurred = HAS_PENDING_EXCEPTION; |
| clear_pending_exception_if_not_oom(CHECK); |
| if (CompileTheWorldPreloadClasses && k.not_null()) { |
| ConstantPool::preload_and_initialize_all_classes(k->constants(), THREAD); |
| if (HAS_PENDING_EXCEPTION) { |
| // If something went wrong in preloading we just ignore it |
| clear_pending_exception_if_not_oom(CHECK); |
| tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer); |
| } |
| } |
| |
| if (_compile_the_world_class_counter >= CompileTheWorldStartAt) { |
| if (k.is_null() || exception_occurred) { |
| // If something went wrong (e.g. ExceptionInInitializerError) we skip this class |
| tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer); |
| } else { |
| tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer); |
| // Preload all classes to get around uncommon traps |
| // Iterate over all methods in class |
| int comp_level = CompilationPolicy::policy()->initial_compile_level(); |
| for (int n = 0; n < k->methods()->length(); n++) { |
| methodHandle m (THREAD, k->methods()->at(n)); |
| if (can_be_compiled(m, comp_level)) { |
| if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { |
| // Give sweeper a chance to keep up with CTW |
| VM_ForceSafepoint op; |
| VMThread::execute(&op); |
| _codecache_sweep_counter = 0; |
| } |
| // Force compilation |
| CompileBroker::compile_method(m, InvocationEntryBci, comp_level, |
| methodHandle(), 0, "CTW", THREAD); |
| if (HAS_PENDING_EXCEPTION) { |
| clear_pending_exception_if_not_oom(CHECK); |
| tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); |
| } else { |
| _compile_the_world_method_counter++; |
| } |
| if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) { |
| // Clobber the first compile and force second tier compilation |
| nmethod* nm = m->code(); |
| if (nm != NULL) { |
| // Throw out the code so that the code cache doesn't fill up |
| nm->make_not_entrant(); |
| m->clear_code(); |
| } |
| CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, |
| methodHandle(), 0, "CTW", THREAD); |
| if (HAS_PENDING_EXCEPTION) { |
| clear_pending_exception_if_not_oom(CHECK); |
| tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); |
| } else { |
| _compile_the_world_method_counter++; |
| } |
| } |
| } else { |
| tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); |
| } |
| |
| nmethod* nm = m->code(); |
| if (nm != NULL) { |
| // Throw out the code so that the code cache doesn't fill up |
| nm->make_not_entrant(); |
| m->clear_code(); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| #endif //PRODUCT |
| |
| // Please keep following two functions at end of this file. With them placed at top or in middle of the file, |
| // they could get inlined by agressive compiler, an unknown trick, see bug 6966589. |
| void PerfClassTraceTime::initialize() { |
| if (!UsePerfData) return; |
| |
| if (_eventp != NULL) { |
| // increment the event counter |
| _eventp->inc(); |
| } |
| |
| // stop the current active thread-local timer to measure inclusive time |
| _prev_active_event = -1; |
| for (int i=0; i < EVENT_TYPE_COUNT; i++) { |
| if (_timers[i].is_active()) { |
| assert(_prev_active_event == -1, "should have only one active timer"); |
| _prev_active_event = i; |
| _timers[i].stop(); |
| } |
| } |
| |
| if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { |
| // start the inclusive timer if not recursively called |
| _t.start(); |
| } |
| |
| // start thread-local timer of the given event type |
| if (!_timers[_event_type].is_active()) { |
| _timers[_event_type].start(); |
| } |
| } |
| |
| PerfClassTraceTime::~PerfClassTraceTime() { |
| if (!UsePerfData) return; |
| |
| // stop the thread-local timer as the event completes |
| // and resume the thread-local timer of the event next on the stack |
| _timers[_event_type].stop(); |
| jlong selftime = _timers[_event_type].ticks(); |
| |
| if (_prev_active_event >= 0) { |
| _timers[_prev_active_event].start(); |
| } |
| |
| if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; |
| |
| // increment the counters only on the leaf call |
| _t.stop(); |
| _timep->inc(_t.ticks()); |
| if (_selftimep != NULL) { |
| _selftimep->inc(selftime); |
| } |
| // add all class loading related event selftime to the accumulated time counter |
| ClassLoader::perf_accumulated_time()->inc(selftime); |
| |
| // reset the timer |
| _timers[_event_type].reset(); |
| } |