--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/classfile/classLoader.cpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,2154 @@
+/*
+ * 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();
+}