author | jiangli |
Mon, 30 Apr 2018 16:59:05 -0400 | |
changeset 49931 | 840e26123940 |
parent 49739 | 00805b129186 |
child 50039 | 9fec54fe663d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_CLASSFILE_CLASSLOADEREXT_HPP |
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#define SHARE_VM_CLASSFILE_CLASSLOADEREXT_HPP |
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#include "classfile/classLoader.hpp" |
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#include "classfile/moduleEntry.hpp" |
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#include "utilities/macros.hpp" |
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CDS_ONLY(class SharedPathsMiscInfoExt;) |
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CDS_ONLY(class ClassListParser;) |
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class ClassLoaderExt: public ClassLoader { // AllStatic |
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public: |
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enum SomeConstants { |
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max_classpath_index = 0x7fff |
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}; |
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// ClassLoaderExt::Context -- |
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// |
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// This is used by DumpSharedSpaces only - it enforces the same classloader |
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// delegation model as would be in run-time. I.e., |
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// + classes defined by the NULL class loader cannot load classes in the PLATFORM or APP paths. |
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// + classes defined by the PLATFORM class loader cannot load classes in the APP paths. |
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class Context { |
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static Thread* _dump_thread; |
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const char* _class_name; |
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const char* _file_name; |
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public: |
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const char* class_name() { |
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return _class_name; |
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} |
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const char* file_name() { |
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return _file_name; |
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} |
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Context(const char* class_name, const char* file_name, TRAPS) { |
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_class_name = class_name; |
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_file_name = file_name; |
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#if INCLUDE_CDS |
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if (!DumpSharedSpaces && !UseSharedSpaces) { |
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// Must not modify _app_class_paths_start_index if we're not using CDS. |
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assert(_app_class_paths_start_index == ClassLoaderExt::max_classpath_index, "must be"); |
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} |
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#endif |
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} |
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bool should_verify(int classpath_index) { |
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CDS_ONLY(return (classpath_index >= _app_class_paths_start_index);) |
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NOT_CDS(return false;) |
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} |
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void record_result(Symbol* class_name, |
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const s2 classpath_index, |
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InstanceKlass* result, |
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TRAPS) { |
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#if INCLUDE_CDS |
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ClassLoaderExt::record_result(this, class_name, classpath_index, result, THREAD); |
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#endif |
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} |
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~Context() { |
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#if INCLUDE_CDS |
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if (!DumpSharedSpaces && !UseSharedSpaces) { |
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// Must not modify app_class_paths_start_index if we're not using CDS. |
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assert(_app_class_paths_start_index == ClassLoaderExt::max_classpath_index, "must be"); |
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} |
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#endif |
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} |
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}; // end ClassLoaderExt::Context |
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private: |
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#if INCLUDE_CDS |
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static char* get_class_path_attr(const char* jar_path, char* manifest, jint manifest_size); |
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static void setup_app_search_path(); // Only when -Xshare:dump |
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static void process_module_table(ModuleEntryTable* met, TRAPS); |
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static SharedPathsMiscInfoExt* shared_paths_misc_info() { |
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return (SharedPathsMiscInfoExt*)_shared_paths_misc_info; |
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} |
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// index of first app JAR in shared classpath entry table |
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static jshort _app_class_paths_start_index; |
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// index of first modular JAR in shared modulepath entry table |
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static jshort _app_module_paths_start_index; |
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static bool _has_app_classes; |
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static bool _has_platform_classes; |
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#endif |
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public: |
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CDS_ONLY(static void process_jar_manifest(ClassPathEntry* entry, bool check_for_duplicates);) |
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// Called by JVMTI code to add boot classpath |
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static void append_boot_classpath(ClassPathEntry* new_entry); |
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static void setup_search_paths() NOT_CDS_RETURN; |
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static void setup_module_paths(TRAPS) NOT_CDS_RETURN; |
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#if INCLUDE_CDS |
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private: |
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static char* read_manifest(ClassPathEntry* entry, jint *manifest_size, bool clean_text, TRAPS); |
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static ClassPathEntry* find_classpath_entry_from_cache(const char* path, TRAPS); |
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public: |
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static char* read_manifest(ClassPathEntry* entry, jint *manifest_size, TRAPS) { |
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// Remove all the new-line continuations (which wrap long lines at 72 characters, see |
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// http://docs.oracle.com/javase/6/docs/technotes/guides/jar/jar.html#JAR%20Manifest), so |
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// that the manifest is easier to parse. |
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return read_manifest(entry, manifest_size, true, THREAD); |
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} |
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static char* read_raw_manifest(ClassPathEntry* entry, jint *manifest_size, TRAPS) { |
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// Do not remove new-line continuations, so we can easily pass it as an argument to |
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// java.util.jar.Manifest.getManifest() at run-time. |
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return read_manifest(entry, manifest_size, false, THREAD); |
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} |
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static void finalize_shared_paths_misc_info(); |
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static jshort app_class_paths_start_index() { return _app_class_paths_start_index; } |
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static jshort app_module_paths_start_index() { return _app_module_paths_start_index; } |
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static void init_paths_start_index(jshort app_start) { |
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_app_class_paths_start_index = app_start; |
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} |
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static void init_app_module_paths_start_index(jshort module_start) { |
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_app_module_paths_start_index = module_start; |
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} |
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static bool is_boot_classpath(int classpath_index) { |
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return classpath_index < _app_class_paths_start_index; |
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} |
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static bool has_platform_or_app_classes() { |
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return _has_app_classes || _has_platform_classes; |
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} |
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static void record_result(class ClassLoaderExt::Context *context, |
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Symbol* class_name, |
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const s2 classpath_index, |
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InstanceKlass* result, TRAPS); |
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static InstanceKlass* load_class(Symbol* h_name, const char* path, TRAPS); |
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static Klass* load_one_class(ClassListParser* parser, TRAPS); |
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static void set_has_app_classes() { |
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_has_app_classes = true; |
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} |
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static void set_has_platform_classes() { |
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_has_platform_classes = true; |
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} |
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#endif |
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}; |
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#endif // SHARE_VM_CLASSFILE_CLASSLOADEREXT_HPP |