jdk-sandbox: comparison src/hotspot/share/classfile/classLoader.cpp

equal deleted inserted replaced

-:4ebc2e2fb97c
+:71c04702a3d5
+/*
+* Copyright (c) 1997, 2017, 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/classFileStream.hpp"
+#include "classfile/classLoader.hpp"
+#include "classfile/classLoaderData.inline.hpp"
+#include "classfile/classLoaderExt.hpp"
+#include "classfile/javaClasses.hpp"
+#include "classfile/jimage.hpp"
+#include "classfile/moduleEntry.hpp"
+#include "classfile/modules.hpp"
+#include "classfile/packageEntry.hpp"
+#include "classfile/klassFactory.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "classfile/vmSymbols.hpp"
+#include "compiler/compileBroker.hpp"
+#include "gc/shared/collectedHeap.inline.hpp"
+#include "gc/shared/generation.hpp"
+#include "interpreter/bytecodeStream.hpp"
+#include "interpreter/oopMapCache.hpp"
+#include "logging/log.hpp"
+#include "logging/logStream.hpp"
+#include "logging/logTag.hpp"
+#include "memory/allocation.inline.hpp"
+#include "memory/filemap.hpp"
+#include "memory/oopFactory.hpp"
+#include "memory/resourceArea.hpp"
+#include "memory/universe.inline.hpp"
+#include "oops/instanceKlass.hpp"
+#include "oops/instanceRefKlass.hpp"
+#include "oops/objArrayOop.inline.hpp"
+#include "oops/oop.inline.hpp"
+#include "oops/symbol.hpp"
+#include "prims/jvm.h"
+#include "prims/jvm_misc.hpp"
+#include "runtime/arguments.hpp"
+#include "runtime/compilationPolicy.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 "runtime/vm_version.hpp"
+#include "services/management.hpp"
+#include "services/threadService.hpp"
+#include "utilities/events.hpp"
+#include "utilities/hashtable.inline.hpp"
+#include "utilities/macros.hpp"
+#if INCLUDE_CDS
+#include "classfile/sharedClassUtil.hpp"
+#include "classfile/sharedPathsMiscInfo.hpp"
+#endif
+// 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 jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n);
+typedef jboolean (JNICALL *ZipInflateFully_t)(void *inBuf, jlong inLen, void *outBuf, jlong outLen, char **pmsg);
+typedef jint     (JNICALL *Crc32_t)(jint crc, const jbyte *buf, jint len);
+static ZipOpen_t         ZipOpen            = NULL;
+static ZipClose_t        ZipClose           = NULL;
+static FindEntry_t       FindEntry          = NULL;
+static ReadEntry_t       ReadEntry          = NULL;
+static GetNextEntry_t    GetNextEntry       = NULL;
+static canonicalize_fn_t CanonicalizeEntry  = NULL;
+static ZipInflateFully_t ZipInflateFully    = NULL;
+static Crc32_t           Crc32              = NULL;
+// Entry points for jimage.dll for loading jimage file entries
+static JImageOpen_t                    JImageOpen             = NULL;
+static JImageClose_t                   JImageClose            = NULL;
+static JImagePackageToModule_t         JImagePackageToModule  = NULL;
+static JImageFindResource_t            JImageFindResource     = NULL;
+static JImageGetResource_t             JImageGetResource      = NULL;
+static JImageResourceIterator_t        JImageResourceIterator = NULL;
+static JImage_ResourcePath_t           JImageResourcePath     = 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;
+GrowableArray<ModuleClassPathList*>* ClassLoader::_patch_mod_entries = NULL;
+GrowableArray<ModuleClassPathList*>* ClassLoader::_exploded_entries = NULL;
+ClassPathEntry* ClassLoader::_jrt_entry = NULL;
+ClassPathEntry* ClassLoader::_first_append_entry = NULL;
+ClassPathEntry* ClassLoader::_last_append_entry  = NULL;
+int             ClassLoader::_num_entries        = 0;
+int             ClassLoader::_num_boot_entries   = -1;
+#if INCLUDE_CDS
+GrowableArray<char*>* ClassLoader::_boot_modules_array = NULL;
+GrowableArray<char*>* ClassLoader::_platform_modules_array = NULL;
+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);
+}
+static const char* get_jimage_version_string() {
+static char version_string[10] = "";
+if (version_string[0] == '\0') {
+jio_snprintf(version_string, sizeof(version_string), "%d.%d",
+Abstract_VM_Version::vm_major_version(), Abstract_VM_Version::vm_minor_version());
+}
+return (const char*)version_string;
+}
+bool ClassLoader::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);
+}
+// Used to obtain the package name from a fully qualified class name.
+// It is the responsibility of the caller to establish a ResourceMark.
+const char* ClassLoader::package_from_name(const char* const class_name, bool* bad_class_name) {
+if (class_name == NULL) {
+if (bad_class_name != NULL) {
+*bad_class_name = true;
+}
+return NULL;
+}
+if (bad_class_name != NULL) {
+*bad_class_name = false;
+}
+const char* const last_slash = strrchr(class_name, '/');
+if (last_slash == NULL) {
+// No package name
+return NULL;
+}
+char* class_name_ptr = (char*) class_name;
+// Skip over '['s
+if (*class_name_ptr == '[') {
+do {
+class_name_ptr++;
+} while (*class_name_ptr == '[');
+// Fully qualified class names should not contain a 'L'.
+// Set bad_class_name to true to indicate that the package name
+// could not be obtained due to an error condition.
+// In this situation, is_same_class_package returns false.
+if (*class_name_ptr == 'L') {
+if (bad_class_name != NULL) {
+*bad_class_name = true;
+}
+return NULL;
+}
+}
+int length = last_slash - class_name_ptr;
+// A class name could have just the slash character in the name.
+if (length <= 0) {
+// No package name
+if (bad_class_name != NULL) {
+*bad_class_name = true;
+}
+return NULL;
+}
+// drop name after last slash (including slash)
+// Ex., "java/lang/String.class" => "java/lang"
+char* pkg_name = NEW_RESOURCE_ARRAY(char, length + 1);
+strncpy(pkg_name, class_name_ptr, length);
+*(pkg_name+length) = '\0';
+return (const char *)pkg_name;
+}
+// Given a fully qualified class name, find its defining package in the class loader's
+// package entry table.
+PackageEntry* ClassLoader::get_package_entry(const char* class_name, ClassLoaderData* loader_data, TRAPS) {
+ResourceMark rm(THREAD);
+const char *pkg_name = ClassLoader::package_from_name(class_name);
+if (pkg_name == NULL) {
+return NULL;
+}
+PackageEntryTable* pkgEntryTable = loader_data->packages();
+TempNewSymbol pkg_symbol = SymbolTable::new_symbol(pkg_name, CHECK_NULL);
+return pkgEntryTable->lookup_only(pkg_symbol);
+}
+ClassPathDirEntry::ClassPathDirEntry(const char* dir) : ClassPathEntry() {
+char* copy = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass);
+strcpy(copy, dir);
+_dir = copy;
+}
+ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) {
+// construct full path name
+char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN);
+if (jio_snprintf(path, JVM_MAXPATHLEN, "%s%s%s", _dir, os::file_separator(), name) == -1) {
+FREE_RESOURCE_ARRAY(char, path, JVM_MAXPATHLEN);
+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);
+}
+FREE_RESOURCE_ARRAY(char, path, JVM_MAXPATHLEN);
+// Resource allocated
+return new ClassFileStream(buffer,
+st.st_size,
+_dir,
+ClassFileStream::verify);
+}
+}
+}
+FREE_RESOURCE_ARRAY(char, path, JVM_MAXPATHLEN);
+return NULL;
+}
+ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name, bool is_boot_append) : ClassPathEntry() {
+_zip = zip;
+char *copy = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass);
+strcpy(copy, zip_name);
+_zip_name = copy;
+_is_boot_append = is_boot_append;
+_multi_versioned = _unknown;
+}
+ClassPathZipEntry::~ClassPathZipEntry() {
+if (ZipClose != NULL) {
+(*ZipClose)(_zip);
+}
+FREE_C_HEAP_ARRAY(char, _zip_name);
+}
+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);
+}
+// 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;
+}
+#if INCLUDE_CDS
+u1* ClassPathZipEntry::open_versioned_entry(const char* name, jint* filesize, TRAPS) {
+u1* buffer = NULL;
+if (DumpSharedSpaces && !_is_boot_append) {
+// We presume default is multi-release enabled
+const char* multi_ver = Arguments::get_property("jdk.util.jar.enableMultiRelease");
+const char* verstr = Arguments::get_property("jdk.util.jar.version");
+bool is_multi_ver = (multi_ver == NULL ||
+strcmp(multi_ver, "true") == 0 ||
+strcmp(multi_ver, "force")  == 0) &&
+is_multiple_versioned(THREAD);
+// command line version setting
+int version = 0;
+const int base_version = 8; // JDK8
+int cur_ver = JDK_Version::current().major_version();
+if (verstr != NULL) {
+version = atoi(verstr);
+if (version < base_version || version > cur_ver) {
+// If the specified version is lower than the base version, the base
+// entry will be used; if the version is higher than the current
+// jdk version, the highest versioned entry will be used.
+if (version < base_version) {
+is_multi_ver = false;
+}
+// print out warning, do not use assertion here since it will continue to look
+// for proper version.
+warning("JDK%d is not supported in multiple version jars", version);
+}
+}
+if (is_multi_ver) {
+int n;
+char* entry_name = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN);
+if (version > 0) {
+n = jio_snprintf(entry_name, JVM_MAXPATHLEN, "META-INF/versions/%d/%s", version, name);
+entry_name[n] = '\0';
+buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL);
+if (buffer == NULL) {
+warning("Could not find %s in %s, try to find highest version instead", entry_name, _zip_name);
+}
+}
+if (buffer == NULL) {
+for (int i = cur_ver; i >= base_version; i--) {
+n = jio_snprintf(entry_name, JVM_MAXPATHLEN, "META-INF/versions/%d/%s", i, name);
+entry_name[n] = '\0';
+buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL);
+if (buffer != NULL) {
+break;
+}
+}
+}
+FREE_RESOURCE_ARRAY(char, entry_name, JVM_MAXPATHLEN);
+}
+}
+return buffer;
+}
+bool ClassPathZipEntry::is_multiple_versioned(TRAPS) {
+assert(DumpSharedSpaces, "called only at dump time");
+if (_multi_versioned != _unknown) {
+return (_multi_versioned == _yes) ? true : false;
+}
+jint size;
+char* buffer = (char*)open_entry("META-INF/MANIFEST.MF", &size, true, CHECK_false);
+if (buffer != NULL) {
+char* p = buffer;
+for ( ; *p; ++p) *p = tolower(*p);
+if (strstr(buffer, "multi-release: true") != NULL) {
+_multi_versioned = _yes;
+return true;
+}
+}
+_multi_versioned = _no;
+return false;
+}
+#endif // INCLUDE_CDS
+ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) {
+jint filesize;
+u1* buffer = open_versioned_entry(name, &filesize, CHECK_NULL);
+if (buffer == NULL) {
+buffer = open_entry(name, &filesize, false, CHECK_NULL);
+if (buffer == NULL) {
+return NULL;
+}
+}
+if (UsePerfData) {
+ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize);
+}
+// Resource allocated
+return new ClassFileStream(buffer,
+filesize,
+_zip_name,
+ClassFileStream::verify);
+}
+// 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);
+}
+}
+ClassPathImageEntry::ClassPathImageEntry(JImageFile* jimage, const char* name) :
+ClassPathEntry(),
+_jimage(jimage) {
+guarantee(jimage != NULL, "jimage file is null");
+guarantee(name != NULL, "jimage file name is null");
+size_t len = strlen(name) + 1;
+_name = NEW_C_HEAP_ARRAY(const char, len, mtClass);
+strncpy((char *)_name, name, len);
+}
+ClassPathImageEntry::~ClassPathImageEntry() {
+if (_name != NULL) {
+FREE_C_HEAP_ARRAY(const char, _name);
+_name = NULL;
+}
+if (_jimage != NULL) {
+(*JImageClose)(_jimage);
+_jimage = NULL;
+}
+}
+// For a class in a named module, look it up in the jimage file using this syntax:
+//    /<module-name>/<package-name>/<base-class>
+//
+// Assumptions:
+//     1. There are no unnamed modules in the jimage file.
+//     2. A package is in at most one module in the jimage file.
+//
+ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) {
+jlong size;
+JImageLocationRef location = (*JImageFindResource)(_jimage, "", get_jimage_version_string(), name, &size);
+if (location == 0) {
+ResourceMark rm;
+const char* pkg_name = ClassLoader::package_from_name(name);
+if (pkg_name != NULL) {
+if (!Universe::is_module_initialized()) {
+location = (*JImageFindResource)(_jimage, JAVA_BASE_NAME, get_jimage_version_string(), name, &size);
+#if INCLUDE_CDS
+// CDS uses the boot class loader to load classes whose packages are in
+// modules defined for other class loaders.  So, for now, get their module
+// names from the "modules" jimage file.
+if (DumpSharedSpaces && location == 0) {
+const char* module_name = (*JImagePackageToModule)(_jimage, pkg_name);
+if (module_name != NULL) {
+location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size);
+}
+}
+#endif
+} else {
+PackageEntry* package_entry = ClassLoader::get_package_entry(name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL);
+if (package_entry != NULL) {
+ResourceMark rm;
+// Get the module name
+ModuleEntry* module = package_entry->module();
+assert(module != NULL, "Boot classLoader package missing module");
+assert(module->is_named(), "Boot classLoader package is in unnamed module");
+const char* module_name = module->name()->as_C_string();
+if (module_name != NULL) {
+location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size);
+}
+}
+}
+}
+}
+if (location != 0) {
+if (UsePerfData) {
+ClassLoader::perf_sys_classfile_bytes_read()->inc(size);
+}
+char* data = NEW_RESOURCE_ARRAY(char, size);
+(*JImageGetResource)(_jimage, location, data, size);
+// Resource allocated
+return new ClassFileStream((u1*)data,
+(int)size,
+_name,
+ClassFileStream::verify);
+}
+return NULL;
+}
+JImageLocationRef ClassLoader::jimage_find_resource(JImageFile* jf,
+const char* module_name,
+const char* file_name,
+jlong &size) {
+return ((*JImageFindResource)(jf, module_name, get_jimage_version_string(), file_name, &size));
+}
+#ifndef PRODUCT
+bool ctw_visitor(JImageFile* jimage,
+const char* module_name, const char* version, const char* package,
+const char* name, const char* extension, void* arg) {
+if (strcmp(extension, "class") == 0) {
+Thread* THREAD = Thread::current();
+ResourceMark rm(THREAD);
+char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JIMAGE_MAX_PATH);
+jio_snprintf(path, JIMAGE_MAX_PATH - 1, "%s/%s.class", package, name);
+ClassLoader::compile_the_world_in(path, *(Handle*)arg, THREAD);
+return !HAS_PENDING_EXCEPTION;
+}
+return true;
+}
+void ClassPathImageEntry::compile_the_world(Handle loader, TRAPS) {
+tty->print_cr("CompileTheWorld : Compiling all classes in %s", name());
+tty->cr();
+(*JImageResourceIterator)(_jimage, (JImageResourceVisitor_t)ctw_visitor, (void *)&loader);
+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");
+}
+}
+}
+#endif
+bool ClassPathImageEntry::is_jrt() {
+return ClassLoader::is_jrt(name());
+}
+#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 -Xlog:class+path=info to diagnose the failure");
+vm_exit_during_initialization(error, message);
+}
+#endif
+ModuleClassPathList::ModuleClassPathList(Symbol* module_name) {
+_module_name = module_name;
+_module_first_entry = NULL;
+_module_last_entry = NULL;
+}
+ModuleClassPathList::~ModuleClassPathList() {
+// Clean out each ClassPathEntry on list
+ClassPathEntry* e = _module_first_entry;
+while (e != NULL) {
+ClassPathEntry* next_entry = e->next();
+delete e;
+e = next_entry;
+}
+}
+void ModuleClassPathList::add_to_list(ClassPathEntry* new_entry) {
+if (new_entry != NULL) {
+if (_module_last_entry == NULL) {
+_module_first_entry = _module_last_entry = new_entry;
+} else {
+_module_last_entry->set_next(new_entry);
+_module_last_entry = new_entry;
+}
+}
+}
+void ClassLoader::trace_class_path(const char* msg, const char* name) {
+LogTarget(Info, class, path) lt;
+if (lt.is_enabled()) {
+LogStream ls(lt);
+if (msg) {
+ls.print("%s", msg);
+}
+if (name) {
+if (strlen(name) < 256) {
+ls.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') {
+ls.print("%c", name[0]);
+name++;
+}
+}
+}
+ls.cr();
+}
+}
+#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_IFMT) != S_IFREG) { // is not a regular file
+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() {
+const char* sys_class_path = Arguments::get_sysclasspath();
+const char* java_class_path = Arguments::get_appclasspath();
+if (PrintSharedArchiveAndExit) {
+// Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily
+// the same as the bootcp of the shared archive.
+} else {
+trace_class_path("bootstrap loader class path=", sys_class_path);
+trace_class_path("classpath: ", java_class_path);
+}
+#if INCLUDE_CDS
+if (DumpSharedSpaces) {
+_shared_paths_misc_info->add_boot_classpath(sys_class_path);
+}
+#endif
+setup_search_path(sys_class_path, true);
+}
+#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
+// Construct the array of module/path pairs as specified to --patch-module
+// for the boot loader to search ahead of the jimage, if the class being
+// loaded is defined to a module that has been specified to --patch-module.
+void ClassLoader::setup_patch_mod_entries() {
+Thread* THREAD = Thread::current();
+GrowableArray<ModulePatchPath*>* patch_mod_args = Arguments::get_patch_mod_prefix();
+int num_of_entries = patch_mod_args->length();
+// Set up the boot loader's _patch_mod_entries list
+_patch_mod_entries = new (ResourceObj::C_HEAP, mtModule) GrowableArray<ModuleClassPathList*>(num_of_entries, true);
+for (int i = 0; i < num_of_entries; i++) {
+const char* module_name = (patch_mod_args->at(i))->module_name();
+Symbol* const module_sym = SymbolTable::lookup(module_name, (int)strlen(module_name), CHECK);
+assert(module_sym != NULL, "Failed to obtain Symbol for module name");
+ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym);
+char* class_path = (patch_mod_args->at(i))->path_string();
+int len = (int)strlen(class_path);
+int end = 0;
+// Iterate over the module's 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';
+struct stat st;
+if (os::stat(path, &st) == 0) {
+// File or directory found
+Thread* THREAD = Thread::current();
+ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
+// If the path specification is valid, enter it into this module's list
+if (new_entry != NULL) {
+module_cpl->add_to_list(new_entry);
+}
+}
+while (class_path[end] == os::path_separator()[0]) {
+end++;
+}
+}
+// Record the module into the list of --patch-module entries only if
+// valid ClassPathEntrys have been created
+if (module_cpl->module_first_entry() != NULL) {
+_patch_mod_entries->push(module_cpl);
+}
+}
+}
+// Determine whether the module has been patched via the command-line
+// option --patch-module
+bool ClassLoader::is_in_patch_mod_entries(Symbol* module_name) {
+if (_patch_mod_entries != NULL && _patch_mod_entries->is_nonempty()) {
+int table_len = _patch_mod_entries->length();
+for (int i = 0; i < table_len; i++) {
+ModuleClassPathList* patch_mod = _patch_mod_entries->at(i);
+if (module_name->fast_compare(patch_mod->module_name()) == 0) {
+return true;
+}
+}
+}
+return false;
+}
+void ClassLoader::setup_search_path(const char *class_path, bool bootstrap_search) {
+int len = (int)strlen(class_path);
+int end = 0;
+bool set_base_piece = bootstrap_search;
+// 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';
+// The first time through the bootstrap_search setup, it must be determined
+// what the base or core piece of the boot loader search is.  Either a java runtime
+// image is present or this is an exploded module build situation.
+if (set_base_piece) {
+assert(string_ends_with(path, MODULES_IMAGE_NAME) || string_ends_with(path, JAVA_BASE_NAME),
+"Incorrect boot loader search path, no java runtime image or " JAVA_BASE_NAME " exploded build");
+struct stat st;
+if (os::stat(path, &st) == 0) {
+// Directory found
+Thread* THREAD = Thread::current();
+ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
+// Check for a jimage
+if (Arguments::has_jimage()) {
+assert(_jrt_entry == NULL, "should not setup bootstrap class search path twice");
+assert(new_entry != NULL && new_entry->is_jrt(), "No java runtime image present");
+_jrt_entry = new_entry;
+++_num_entries;
+#if INCLUDE_CDS
+if (DumpSharedSpaces) {
+JImageFile *jimage = _jrt_entry->jimage();
+assert(jimage != NULL, "No java runtime image file present");
+ClassLoader::initialize_module_loader_map(jimage);
+}
+#endif
+}
+} else {
+// If path does not exist, exit
+vm_exit_during_initialization("Unable to establish the boot loader search path", path);
+}
+set_base_piece = false;
+} else {
+// Every entry on the system boot class path after the initial base piece,
+// which is set by os::set_boot_path(), is considered an appended entry.
+update_class_path_entry_list(path, false, bootstrap_search);
+}
+#if INCLUDE_CDS
+if (DumpSharedSpaces) {
+check_shared_classpath(path);
+}
+#endif
+while (class_path[end] == os::path_separator()[0]) {
+end++;
+}
+}
+}
+// During an exploded modules build, each module defined to the boot loader
+// will be added to the ClassLoader::_exploded_entries array.
+void ClassLoader::add_to_exploded_build_list(Symbol* module_sym, TRAPS) {
+assert(!ClassLoader::has_jrt_entry(), "Exploded build not applicable");
+assert(_exploded_entries != NULL, "_exploded_entries was not initialized");
+// Find the module's symbol
+ResourceMark rm(THREAD);
+const char *module_name = module_sym->as_C_string();
+const char *home = Arguments::get_java_home();
+const char file_sep = os::file_separator()[0];
+// 10 represents the length of "modules" + 2 file separators + \0
+size_t len = strlen(home) + strlen(module_name) + 10;
+char *path = NEW_C_HEAP_ARRAY(char, len, mtModule);
+jio_snprintf(path, len, "%s%cmodules%c%s", home, file_sep, file_sep, module_name);
+struct stat st;
+if (os::stat(path, &st) == 0) {
+// Directory found
+ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
+// If the path specification is valid, enter it into this module's list.
+// There is no need to check for duplicate modules in the exploded entry list,
+// since no two modules with the same name can be defined to the boot loader.
+// This is checked at module definition time in Modules::define_module.
+if (new_entry != NULL) {
+ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym);
+module_cpl->add_to_list(new_entry);
+{
+MutexLocker ml(Module_lock, THREAD);
+_exploded_entries->push(module_cpl);
+}
+log_info(class, load)("path: %s", path);
+}
+}
+FREE_C_HEAP_ARRAY(char, path);
+}
+ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st,
+bool throw_exception,
+bool is_boot_append, TRAPS) {
+JavaThread* thread = JavaThread::current();
+ClassPathEntry* new_entry = NULL;
+if ((st->st_mode & S_IFMT) == S_IFREG) {
+ResourceMark rm(thread);
+// Regular file, should be a zip or jimage file
+// Canonicalized filename
+char* canonical_path = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, 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;
+}
+}
+jint error;
+JImageFile* jimage =(*JImageOpen)(canonical_path, &error);
+if (jimage != NULL) {
+new_entry = new ClassPathImageEntry(jimage, canonical_path);
+} else {
+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, is_boot_append);
+} else {
+char *msg;
+if (error_msg == NULL) {
+msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, 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_IN_THREAD(thread, char, len); ;
+jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path);
+}
+// Don't complain about bad jar files added via -Xbootclasspath/a:.
+if (throw_exception && is_init_completed()) {
+THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL);
+} else {
+return NULL;
+}
+}
+}
+log_info(class, path)("opened: %s", path);
+log_info(class, load)("opened: %s", path);
+} else {
+// Directory
+new_entry = new ClassPathDirEntry(path);
+log_info(class, load)("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, bool is_boot_append) {
+// check for a regular file
+struct stat st;
+if (os::stat(path, &st) == 0) {
+if ((st.st_mode & S_IFMT) == S_IFREG) {
+char canonical_path[JVM_MAXPATHLEN];
+if (get_canonical_path(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, is_boot_append);
+}
+}
+}
+}
+return NULL;
+}
+// returns true if entry already on class path
+bool ClassLoader::contains_append_entry(const char* name) {
+ClassPathEntry* e = _first_append_entry;
+while (e != NULL) {
+// assume zip entries have been canonicalized
+if (strcmp(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_append_entry == NULL) {
+assert(_first_append_entry == NULL, "boot loader's append class path entry list not empty");
+_first_append_entry = _last_append_entry = new_entry;
+} else {
+_last_append_entry->set_next(new_entry);
+_last_append_entry = new_entry;
+}
+}
+_num_entries++;
+}
+void ClassLoader::add_to_list(const char *apath) {
+update_class_path_entry_list((char*)apath, false, false);
+}
+// Returns true IFF the file/dir exists and the entry was successfully created.
+bool ClassLoader::update_class_path_entry_list(const char *path,
+bool check_for_duplicates,
+bool is_boot_append,
+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, throw_exception, is_boot_append, CHECK_(false));
+if (new_entry == NULL) {
+return false;
+}
+// Do not reorder the bootclasspath which would break get_system_package().
+// Add new entry to linked list
+if (!check_for_duplicates || !contains_append_entry(new_entry->name())) {
+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);
+}
+#endif
+return false;
+}
+}
+static void print_module_entry_table(const GrowableArray<ModuleClassPathList*>* const module_list) {
+ResourceMark rm;
+int num_of_entries = module_list->length();
+for (int i = 0; i < num_of_entries; i++) {
+ClassPathEntry* e;
+ModuleClassPathList* mpl = module_list->at(i);
+tty->print("%s=", mpl->module_name()->as_C_string());
+e = mpl->module_first_entry();
+while (e != NULL) {
+tty->print("%s", e->name());
+e = e->next();
+if (e != NULL) {
+tty->print("%s", os::path_separator());
+}
+}
+tty->print(" ;");
+}
+}
+void ClassLoader::print_bootclasspath() {
+ClassPathEntry* e;
+tty->print("[bootclasspath= ");
+// Print --patch-module module/path specifications first
+if (_patch_mod_entries != NULL) {
+print_module_entry_table(_patch_mod_entries);
+}
+// [jimage | exploded modules build]
+if (has_jrt_entry()) {
+// Print the location of the java runtime image
+tty->print("%s ;", _jrt_entry->name());
+} else {
+// Print exploded module build path specifications
+if (_exploded_entries != NULL) {
+print_module_entry_table(_exploded_entries);
+}
+}
+// appended entries
+e = _first_append_entry;
+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_locate_lib(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"));
+GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry"));
+ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully"));
+Crc32        = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32"));
+// 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 || Crc32 == NULL) {
+vm_exit_during_initialization("Corrupted ZIP library", path);
+}
+if (ZipInflateFully == NULL) {
+vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", 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
+}
+void ClassLoader::load_jimage_library() {
+// First make sure native library is loaded
+os::native_java_library();
+// Load jimage library
+char path[JVM_MAXPATHLEN];
+char ebuf[1024];
+void* handle = NULL;
+if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) {
+handle = os::dll_load(path, ebuf, sizeof ebuf);
+}
+if (handle == NULL) {
+vm_exit_during_initialization("Unable to load jimage library", path);
+}
+// Lookup jimage entry points
+JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open"));
+guarantee(JImageOpen != NULL, "function JIMAGE_Open not found");
+JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close"));
+guarantee(JImageClose != NULL, "function JIMAGE_Close not found");
+JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule"));
+guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found");
+JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource"));
+guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found");
+JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource"));
+guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found");
+JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator"));
+guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found");
+JImageResourcePath = CAST_TO_FN_PTR(JImage_ResourcePath_t, os::dll_lookup(handle, "JIMAGE_ResourcePath"));
+guarantee(JImageResourcePath != NULL, "function JIMAGE_ResourcePath not found");
+}
+jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) {
+return (*ZipInflateFully)(in, inSize, out, outSize, pmsg);
+}
+int ClassLoader::crc32(int crc, const char* buf, int len) {
+assert(Crc32 != NULL, "ZIP_CRC32 is not found");
+return (*Crc32)(crc, (const jbyte*)buf, len);
+}
+#if INCLUDE_CDS
+void ClassLoader::initialize_module_loader_map(JImageFile* jimage) {
+if (!DumpSharedSpaces) {
+return; // only needed for CDS dump time
+}
+ResourceMark rm;
+jlong size;
+JImageLocationRef location = (*JImageFindResource)(jimage, JAVA_BASE_NAME, get_jimage_version_string(), MODULE_LOADER_MAP, &size);
+if (location == 0) {
+vm_exit_during_initialization(
+"Cannot find ModuleLoaderMap location from modules jimage.", NULL);
+}
+char* buffer = NEW_RESOURCE_ARRAY(char, size + 1);
+buffer[size] = '\0';
+jlong read = (*JImageGetResource)(jimage, location, buffer, size);
+if (read != size) {
+vm_exit_during_initialization(
+"Cannot find ModuleLoaderMap resource from modules jimage.", NULL);
+}
+char* char_buf = (char*)buffer;
+int buflen = (int)strlen(char_buf);
+char* begin_ptr = char_buf;
+char* end_ptr = strchr(begin_ptr, '\n');
+bool process_boot_modules = false;
+_boot_modules_array = new (ResourceObj::C_HEAP, mtModule)
+GrowableArray<char*>(INITIAL_BOOT_MODULES_ARRAY_SIZE, true);
+_platform_modules_array = new (ResourceObj::C_HEAP, mtModule)
+GrowableArray<char*>(INITIAL_PLATFORM_MODULES_ARRAY_SIZE, true);
+while (end_ptr != NULL && (end_ptr - char_buf) < buflen) {
+// Allocate a buffer from the C heap to be appended to the _boot_modules_array
+// or the _platform_modules_array.
+char* temp_name = NEW_C_HEAP_ARRAY(char, (size_t)(end_ptr - begin_ptr + 1), mtInternal);
+strncpy(temp_name, begin_ptr, end_ptr - begin_ptr);
+temp_name[end_ptr - begin_ptr] = '\0';
+if (strncmp(temp_name, "BOOT", 4) == 0) {
+process_boot_modules = true;
+FREE_C_HEAP_ARRAY(char, temp_name);
+} else if (strncmp(temp_name, "PLATFORM", 8) == 0) {
+process_boot_modules = false;
+FREE_C_HEAP_ARRAY(char, temp_name);
+} else {
+// module name
+if (process_boot_modules) {
+_boot_modules_array->append(temp_name);
+} else {
+_platform_modules_array->append(temp_name);
+}
+}
+begin_ptr = ++end_ptr;
+end_ptr = strchr(begin_ptr, '\n');
+}
+}
+#endif
+// Function add_package extracts the package from the fully qualified class name
+// and checks if the package is in the boot loader's package entry table.  If so,
+// then it sets the classpath_index in the package entry record.
+//
+// The classpath_index field is used to find the entry on the boot loader class
+// path for packages with classes loaded by the boot loader from -Xbootclasspath/a
+// in an unnamed module.  It is also used to indicate (for all packages whose
+// classes are loaded by the boot loader) that at least one of the package's
+// classes has been loaded.
+bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) {
+assert(fullq_class_name != NULL, "just checking");
+// Get package name from fully qualified class name.
+ResourceMark rm;
+const char *cp = package_from_name(fullq_class_name);
+if (cp != NULL) {
+PackageEntryTable* pkg_entry_tbl = ClassLoaderData::the_null_class_loader_data()->packages();
+TempNewSymbol pkg_symbol = SymbolTable::new_symbol(cp, CHECK_false);
+PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol);
+if (pkg_entry != NULL) {
+assert(classpath_index != -1, "Unexpected classpath_index");
+pkg_entry->set_classpath_index(classpath_index);
+} else {
+return false;
+}
+}
+return true;
+}
+oop ClassLoader::get_system_package(const char* name, TRAPS) {
+// Look up the name in the boot loader's package entry table.
+if (name != NULL) {
+TempNewSymbol package_sym = SymbolTable::new_symbol(name, (int)strlen(name), CHECK_NULL);
+// Look for the package entry in the boot loader's package entry table.
+PackageEntry* package =
+ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym);
+// Return NULL if package does not exist or if no classes in that package
+// have been loaded.
+if (package != NULL && package->has_loaded_class()) {
+ModuleEntry* module = package->module();
+if (module->location() != NULL) {
+ResourceMark rm(THREAD);
+Handle ml = java_lang_String::create_from_str(
+module->location()->as_C_string(), THREAD);
+return ml();
+}
+// Return entry on boot loader class path.
+Handle cph = java_lang_String::create_from_str(
+ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD);
+return cph();
+}
+}
+return NULL;
+}
+objArrayOop ClassLoader::get_system_packages(TRAPS) {
+ResourceMark rm(THREAD);
+// List of pointers to PackageEntrys that have loaded classes.
+GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50);
+{
+MutexLocker ml(Module_lock, THREAD);
+PackageEntryTable* pe_table =
+ClassLoaderData::the_null_class_loader_data()->packages();
+// Collect the packages that have at least one loaded class.
+for (int x = 0; x < pe_table->table_size(); x++) {
+for (PackageEntry* package_entry = pe_table->bucket(x);
+package_entry != NULL;
+package_entry = package_entry->next()) {
+if (package_entry->has_loaded_class()) {
+loaded_class_pkgs->append(package_entry);
+}
+}
+}
+}
+// Allocate objArray and fill with java.lang.String
+objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
+loaded_class_pkgs->length(), CHECK_NULL);
+objArrayHandle result(THREAD, r);
+for (int x = 0; x < loaded_class_pkgs->length(); x++) {
+PackageEntry* package_entry = loaded_class_pkgs->at(x);
+Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL);
+result->obj_at_put(x, str());
+}
+return result();
+}
+#if INCLUDE_CDS
+s2 ClassLoader::module_to_classloader(const char* module_name) {
+assert(DumpSharedSpaces, "dump time only");
+assert(_boot_modules_array != NULL, "_boot_modules_array is NULL");
+assert(_platform_modules_array != NULL, "_platform_modules_array is NULL");
+int array_size = _boot_modules_array->length();
+for (int i = 0; i < array_size; i++) {
+if (strcmp(module_name, _boot_modules_array->at(i)) == 0) {
+return BOOT_LOADER;
+}
+}
+array_size = _platform_modules_array->length();
+for (int i = 0; i < array_size; i++) {
+if (strcmp(module_name, _platform_modules_array->at(i)) == 0) {
+return PLATFORM_LOADER;
+}
+}
+return APP_LOADER;
+}
+s2 ClassLoader::classloader_type(Symbol* class_name, ClassPathEntry* e, int classpath_index, TRAPS) {
+assert(DumpSharedSpaces, "Only used for CDS dump time");
+// obtain the classloader type based on the class name.
+// First obtain the package name based on the class name. Then obtain
+// the classloader type based on the package name from the jimage using
+// a jimage API. If the classloader type cannot be found from the
+// jimage, it is determined by the class path entry.
+jshort loader_type = ClassLoader::APP_LOADER;
+if (e->is_jrt()) {
+ResourceMark rm;
+TempNewSymbol pkg_name = InstanceKlass::package_from_name(class_name, CHECK_0);
+if (pkg_name != NULL) {
+const char* pkg_name_C_string = (const char*)(pkg_name->as_C_string());
+ClassPathImageEntry* cpie = (ClassPathImageEntry*)e;
+JImageFile* jimage = cpie->jimage();
+char* module_name = (char*)(*JImagePackageToModule)(jimage, pkg_name_C_string);
+if (module_name != NULL) {
+loader_type = ClassLoader::module_to_classloader(module_name);
+}
+}
+} else if (ClassLoaderExt::is_boot_classpath(classpath_index)) {
+loader_type = ClassLoader::BOOT_LOADER;
+}
+return loader_type;
+}
+#endif
+// caller needs ResourceMark
+const char* ClassLoader::file_name_for_class_name(const char* class_name,
+int class_name_len) {
+assert(class_name != NULL, "invariant");
+assert((int)strlen(class_name) == class_name_len, "invariant");
+static const char class_suffix[] = ".class";
+char* const file_name = NEW_RESOURCE_ARRAY(char,
+class_name_len +
+sizeof(class_suffix)); // includes term NULL
+strncpy(file_name, class_name, class_name_len);
+strncpy(&file_name[class_name_len], class_suffix, sizeof(class_suffix));
+return file_name;
+}
+ClassPathEntry* find_first_module_cpe(ModuleEntry* mod_entry,
+const GrowableArray<ModuleClassPathList*>* const module_list) {
+int num_of_entries = module_list->length();
+const Symbol* class_module_name = mod_entry->name();
+// Loop through all the modules in either the patch-module or exploded entries looking for module
+for (int i = 0; i < num_of_entries; i++) {
+ModuleClassPathList* module_cpl = module_list->at(i);
+Symbol* module_cpl_name = module_cpl->module_name();
+if (module_cpl_name->fast_compare(class_module_name) == 0) {
+// Class' module has been located.
+return module_cpl->module_first_entry();
+}
+}
+return NULL;
+}
+// Search either the patch-module or exploded build entries for class.
+ClassFileStream* ClassLoader::search_module_entries(const GrowableArray<ModuleClassPathList*>* const module_list,
+const char* const class_name,
+const char* const file_name,
+TRAPS) {
+ClassFileStream* stream = NULL;
+// Find the class' defining module in the boot loader's module entry table
+PackageEntry* pkg_entry = get_package_entry(class_name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL);
+ModuleEntry* mod_entry = (pkg_entry != NULL) ? pkg_entry->module() : NULL;
+// If the module system has not defined java.base yet, then
+// classes loaded are assumed to be defined to java.base.
+// When java.base is eventually defined by the module system,
+// all packages of classes that have been previously loaded
+// are verified in ModuleEntryTable::verify_javabase_packages().
+if (!Universe::is_module_initialized() &&
+!ModuleEntryTable::javabase_defined() &&
+mod_entry == NULL) {
+mod_entry = ModuleEntryTable::javabase_moduleEntry();
+}
+// The module must be a named module
+ClassPathEntry* e = NULL;
+if (mod_entry != NULL && mod_entry->is_named()) {
+if (module_list == _exploded_entries) {
+// The exploded build entries can be added to at any time so a lock is
+// needed when searching them.
+assert(!ClassLoader::has_jrt_entry(), "Must be exploded build");
+MutexLocker ml(Module_lock, THREAD);
+e = find_first_module_cpe(mod_entry, module_list);
+} else {
+e = find_first_module_cpe(mod_entry, module_list);
+}
+}
+// Try to load the class from the module's ClassPathEntry list.
+while (e != NULL) {
+stream = e->open_stream(file_name, CHECK_NULL);
+// No context.check is required since CDS is not supported
+// for an exploded modules build or if --patch-module is specified.
+if (NULL != stream) {
+return stream;
+}
+e = e->next();
+}
+// If the module was located, break out even if the class was not
+// located successfully from that module's ClassPathEntry list.
+// There will not be another valid entry for that module.
+return NULL;
+}
+InstanceKlass* ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) {
+assert(name != NULL, "invariant");
+assert(THREAD->is_Java_thread(), "must be a JavaThread");
+ResourceMark rm(THREAD);
+HandleMark hm(THREAD);
+const char* const class_name = name->as_C_string();
+EventMark m("loading class %s", class_name);
+const char* const file_name = file_name_for_class_name(class_name,
+name->utf8_length());
+assert(file_name != NULL, "invariant");
+ClassLoaderExt::Context context(class_name, file_name, THREAD);
+// Lookup stream for parsing .class file
+ClassFileStream* stream = NULL;
+s2 classpath_index = 0;
+ClassPathEntry* e = NULL;
+// If DumpSharedSpaces is true boot loader visibility boundaries are set to:
+//   - [jimage] + [_first_append_entry to _last_append_entry] (all path entries).
+//
+// If search_append_only is true, boot loader visibility boundaries are
+// set to be _first_append_entry to the end. This includes:
+//   [-Xbootclasspath/a]; [jvmti appended entries]
+//
+// If both DumpSharedSpaces and search_append_only are false, boot loader
+// visibility boundaries are set to be the --patch-module entries plus the base piece.
+// This would include:
+//   [--patch-module=<module>=<file>(<pathsep><file>)*]; [jimage | exploded module build]
+//
+// Load Attempt #1: --patch-module
+// Determine the class' defining module.  If it appears in the _patch_mod_entries,
+// attempt to load the class from those locations specific to the module.
+// Specifications to --patch-module can contain a partial number of classes
+// that are part of the overall module definition.  So if a particular class is not
+// found within its module specification, the search should continue to Load Attempt #2.
+// Note: The --patch-module entries are never searched if the boot loader's
+//       visibility boundary is limited to only searching the append entries.
+if (_patch_mod_entries != NULL && !search_append_only) {
+// At CDS dump time, the --patch-module entries are ignored. That means a
+// class is still loaded from the runtime image even if it might
+// appear in the _patch_mod_entries. The runtime shared class visibility
+// check will determine if a shared class is visible based on the runtime
+// environemnt, including the runtime --patch-module setting.
+if (!DumpSharedSpaces) {
+stream = search_module_entries(_patch_mod_entries, class_name, file_name, CHECK_NULL);
+}
+}
+// Load Attempt #2: [jimage | exploded build]
+if (!search_append_only && (NULL == stream)) {
+if (has_jrt_entry()) {
+e = _jrt_entry;
+stream = _jrt_entry->open_stream(file_name, CHECK_NULL);
+if (!context.check(stream, classpath_index)) {
+return NULL;
+}
+} else {
+// Exploded build - attempt to locate class in its defining module's location.
+assert(_exploded_entries != NULL, "No exploded build entries present");
+stream = search_module_entries(_exploded_entries, class_name, file_name, CHECK_NULL);
+}
+}
+// Load Attempt #3: [-Xbootclasspath/a]; [jvmti appended entries]
+if ((search_append_only || DumpSharedSpaces) && (NULL == stream)) {
+// For the boot loader append path search, the starting classpath_index
+// for the appended piece is always 1 to account for either the
+// _jrt_entry or the _exploded_entries.
+assert(classpath_index == 0, "The classpath_index has been incremented incorrectly");
+classpath_index = 1;
+e = _first_append_entry;
+while (e != NULL) {
+if (DumpSharedSpaces && classpath_index >= _num_boot_entries) {
+// Do not load any class from the app classpath using the boot loader. Let
+// the built-in app class laoder load them.
+break;
+}
+stream = e->open_stream(file_name, CHECK_NULL);
+if (!context.check(stream, classpath_index)) {
+return NULL;
+}
+if (NULL != stream) {
+break;
+}
+e = e->next();
+++classpath_index;
+}
+}
+if (NULL == stream) {
+return NULL;
+}
+stream->set_verify(context.should_verify(classpath_index));
+ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
+Handle protection_domain;
+InstanceKlass* result = KlassFactory::create_from_stream(stream,
+name,
+loader_data,
+protection_domain,
+NULL, // host_klass
+NULL, // cp_patches
+THREAD);
+if (HAS_PENDING_EXCEPTION) {
+if (DumpSharedSpaces) {
+tty->print_cr("Preload Error: Failed to load %s", class_name);
+}
+return NULL;
+}
+return context.record_result(name, e, classpath_index, result, THREAD);
+}
+#if INCLUDE_CDS
+static char* skip_uri_protocol(char* source) {
+if (strncmp(source, "file:", 5) == 0) {
+// file: protocol path could start with file:/ or file:///
+// locate the char after all the forward slashes
+int offset = 5;
+while (*(source + offset) == '/') {
+offset++;
+}
+source += offset;
+// for non-windows platforms, move back one char as the path begins with a '/'
+#ifndef _WINDOWS
+source -= 1;
+#endif
+} else if (strncmp(source, "jrt:/", 5) == 0) {
+source += 5;
+}
+return source;
+}
+void ClassLoader::record_shared_class_loader_type(InstanceKlass* ik, const ClassFileStream* stream) {
+assert(DumpSharedSpaces, "sanity");
+assert(stream != NULL, "sanity");
+if (ik->is_anonymous()) {
+// We do not archive anonymous classes.
+return;
+}
+if (stream->source() == NULL) {
+if (ik->class_loader() == NULL) {
+// JFR classes
+ik->set_shared_classpath_index(0);
+ik->set_class_loader_type(ClassLoader::BOOT_LOADER);
+}
+return;
+}
+assert(has_jrt_entry(), "CDS dumping does not support exploded JDK build");
+ModuleEntry* module = ik->module();
+ClassPathEntry* e = NULL;
+int classpath_index = 0;
+// Check if the class is from the runtime image
+if (module != NULL && (module->location() != NULL) &&
+(module->location()->starts_with("jrt:"))) {
+e = _jrt_entry;
+classpath_index = 0;
+} else {
+classpath_index = 1;
+ResourceMark rm;
+char* canonical_path = NEW_RESOURCE_ARRAY(char, JVM_MAXPATHLEN);
+for (e = _first_append_entry; e != NULL; e = e->next()) {
+if (get_canonical_path(e->name(), canonical_path, JVM_MAXPATHLEN)) {
+char* src = (char*)stream->source();
+// save the path from the file: protocol or the module name from the jrt: protocol
+// if no protocol prefix is found, src is the same as stream->source() after the following call
+src = skip_uri_protocol(src);
+if (strcmp(canonical_path, os::native_path((char*)src)) == 0) {
+break;
+}
+classpath_index ++;
+}
+}
+if (e == NULL) {
+assert(ik->shared_classpath_index() < 0,
+"must be a class from a custom jar which isn't in the class path or boot class path");
+return;
+}
+}
+if (classpath_index < _num_boot_entries) {
+// ik is either:
+// 1) a boot class loaded from the runtime image during vm initialization (classpath_index = 0); or
+// 2) a user's class from -Xbootclasspath/a (classpath_index > 0)
+// In the second case, the classpath_index, classloader_type will be recorded via
+// context.record_result() in ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS).
+if (classpath_index > 0) {
+return;
+}
+}
+ResourceMark rm;
+const char* const class_name = ik->name()->as_C_string();
+const char* const file_name = file_name_for_class_name(class_name,
+ik->name()->utf8_length());
+assert(file_name != NULL, "invariant");
+Thread* THREAD = Thread::current();
+ClassLoaderExt::Context context(class_name, file_name, CATCH);
+context.record_result(ik->name(), e, classpath_index, ik, THREAD);
+}
+#endif // INCLUDE_CDS
+// 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() {
+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();
+// lookup jimage library entry points
+load_jimage_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 INCLUDE_CDS
+void ClassLoader::initialize_shared_path() {
+if (DumpSharedSpaces) {
+_num_boot_entries = _num_entries;
+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_init1() {
+ClassLoader::initialize();
+}
+// Complete the ClassPathEntry setup for the boot loader
+void ClassLoader::classLoader_init2(TRAPS) {
+// Setup the list of module/path pairs for --patch-module processing
+// This must be done after the SymbolTable is created in order
+// to use fast_compare on module names instead of a string compare.
+if (Arguments::get_patch_mod_prefix() != NULL) {
+setup_patch_mod_entries();
+}
+// Create the ModuleEntry for java.base (must occur after setup_patch_mod_entries
+// to successfully determine if java.base has been patched)
+create_javabase();
+// Setup the initial java.base/path pair for the exploded build entries.
+// As more modules are defined during module system initialization, more
+// entries will be added to the exploded build array.
+if (!has_jrt_entry()) {
+assert(!DumpSharedSpaces, "DumpSharedSpaces not supported with exploded module builds");
+assert(!UseSharedSpaces, "UsedSharedSpaces not supported with exploded module builds");
+// Set up the boot loader's _exploded_entries list.  Note that this gets
+// done before loading any classes, by the same thread that will
+// subsequently do the first class load. So, no lock is needed for this.
+assert(_exploded_entries == NULL, "Should only get initialized once");
+_exploded_entries = new (ResourceObj::C_HEAP, mtModule)
+GrowableArray<ModuleClassPathList*>(EXPLODED_ENTRY_SIZE, true);
+add_to_exploded_build_list(vmSymbols::java_base(), CHECK);
+}
+}
+bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) {
+assert(orig != NULL && out != NULL && len > 0, "bad arguments");
+if (CanonicalizeEntry != NULL) {
+JavaThread* THREAD = JavaThread::current();
+JNIEnv* env = THREAD->jni_environment();
+ResourceMark rm(THREAD);
+// os::native_path writes into orig_copy
+char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1);
+strcpy(orig_copy, orig);
+if ((CanonicalizeEntry)(env, os::native_path(orig_copy), 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;
+}
+void ClassLoader::create_javabase() {
+Thread* THREAD = Thread::current();
+// Create java.base's module entry for the boot
+// class loader prior to loading j.l.Ojbect.
+ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data();
+// Get module entry table
+ModuleEntryTable* null_cld_modules = null_cld->modules();
+if (null_cld_modules == NULL) {
+vm_exit_during_initialization("No ModuleEntryTable for the boot class loader");
+}
+{
+MutexLocker ml(Module_lock, THREAD);
+ModuleEntry* jb_module = null_cld_modules->locked_create_entry_or_null(Handle(),
+false, vmSymbols::java_base(), NULL, NULL, null_cld);
+if (jb_module == NULL) {
+vm_exit_during_initialization("Unable to create ModuleEntry for " JAVA_BASE_NAME);
+}
+ModuleEntryTable::set_javabase_moduleEntry(jb_module);
+}
+}
+#ifndef PRODUCT
+// 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();
+}
+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");
+}
+}
+}
+void ClassLoader::compile_the_world() {
+EXCEPTION_MARK;
+HandleMark hm(THREAD);
+ResourceMark rm(THREAD);
+assert(has_jrt_entry(), "Compile The World not supported with exploded module build");
+// Find bootstrap loader
+Handle system_class_loader (THREAD, SystemDictionary::java_system_loader());
+jlong start = os::javaTimeMillis();
+// Compile the world for the modular java runtime image
+_jrt_entry->compile_the_world(system_class_loader, CATCH);
+// Iterate over all bootstrap class path appended entries
+ClassPathEntry* e = _first_append_entry;
+while (e != NULL) {
+assert(!e->is_jrt(), "A modular java runtime image is present on the list of appended entries");
+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(const 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) {
+if (string_ends_with(name, ".class")) {
+// We have a .class file
+int len = (int)strlen(name);
+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* k = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD);
+if (k != NULL && !HAS_PENDING_EXCEPTION) {
+k->initialize(THREAD);
+}
+bool exception_occurred = HAS_PENDING_EXCEPTION;
+clear_pending_exception_if_not_oom(CHECK);
+if (CompileTheWorldPreloadClasses && k != NULL) {
+InstanceKlass* ik = InstanceKlass::cast(k);
+ConstantPool::preload_and_initialize_all_classes(ik->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 == 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();
+InstanceKlass* ik = InstanceKlass::cast(k);
+for (int n = 0; n < ik->methods()->length(); n++) {
+methodHandle m (THREAD, ik->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_CTWThreshold op;
+VMThread::execute(&op);
+_codecache_sweep_counter = 0;
+}
+// Force compilation
+CompileBroker::compile_method(m, InvocationEntryBci, comp_level,
+methodHandle(), 0, CompileTask::Reason_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
+CompiledMethod* nm = m->code();
+if (nm != NULL && !m->is_method_handle_intrinsic()) {
+// Throw out the code so that the code cache doesn't fill up
+nm->make_not_entrant();
+}
+CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization,
+methodHandle(), 0, CompileTask::Reason_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());
+}
+CompiledMethod* nm = m->code();
+if (nm != NULL && !m->is_method_handle_intrinsic()) {
+// Throw out the code so that the code cache doesn't fill up
+nm->make_not_entrant();
+}
+}
+}
+}
+}
+}
+}
+#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();
+}

changeset 47216	71c04702a3d5
parent 47106	bed18a111b90
child 47564	25ef5e64fd71