rev 6864 : 8061651: Interface to the Lookup Index Cache to improve URLClassPath search time
Summary: Implemented the interface in sun.misc.URLClassPath and corresponding JVM_XXX APIs
Reviewed-by: mchung, acorn, jiangli, dholmes

          --- old/src/share/vm/classfile/classLoaderExt.hpp
          +++ new/src/share/vm/classfile/classLoaderExt.hpp

   1    1  /*
   2    2   * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
   3    3   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4    4   *
   5    5   * This code is free software; you can redistribute it and/or modify it
   6    6   * under the terms of the GNU General Public License version 2 only, as
   7    7   * published by the Free Software Foundation.
   8    8   *
   9    9   * This code is distributed in the hope that it will be useful, but WITHOUT
  10   10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11   11   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12   12   * version 2 for more details (a copy is included in the LICENSE file that
  13   13   * accompanied this code).
  14   14   *
  15   15   * You should have received a copy of the GNU General Public License version
  16   16   * 2 along with this work; if not, write to the Free Software Foundation,
  17   17   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18   18   *
  19   19   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20   20   * or visit www.oracle.com if you need additional information or have any
  21   21   * questions.
  22   22   *
  23   23   */
  24   24  
  25   25  #ifndef SHARE_VM_CLASSFILE_CLASSLOADEREXT_HPP
  26   26  #define SHARE_VM_CLASSFILE_CLASSLOADEREXT_HPP
  27   27  
  28   28  #include "classfile/classLoader.hpp"
  29   29  
  30   30  class ClassLoaderExt: public ClassLoader { // AllStatic
  31   31  public:
  32   32  
  33   33    class Context {
  34   34      const char* _file_name;
  35   35    public:
  36   36      Context(const char* class_name, const char* file_name, TRAPS) {
  37   37        _file_name = file_name;
  38   38      }
  39   39  
  40   40      bool check(ClassFileStream* stream, const int classpath_index) {
  41   41        return true;
  42   42      }
  43   43  
  44   44      bool should_verify(int classpath_index) {
  45   45        return false;
  46   46      }
  47   47  
  48   48      instanceKlassHandle record_result(const int classpath_index,
  49   49                                        ClassPathEntry* e, instanceKlassHandle result, TRAPS) {
  50   50        if (ClassLoader::add_package(_file_name, classpath_index, THREAD)) {
  51   51          if (DumpSharedSpaces) {
  52   52            result->set_shared_classpath_index(classpath_index);
  53   53          }
  54   54          return result;
  55   55        } else {
  56   56          return instanceKlassHandle(); // NULL

  57   57        }
  58   58      }
  59   59    };
  60   60  
  61   61  
  62   62    static void add_class_path_entry(const char* path, bool check_for_duplicates,
  63   63                                     ClassPathEntry* new_entry) {
  64   64      ClassLoader::add_to_list(new_entry);
  65   65    }
  66   66    static void setup_search_paths() {}
       67 +
       68 +  static void init_lookup_cache(TRAPS) {}
       69 +  static void copy_lookup_cache_to_archive(char** top, char* end) {}
       70 +  static char* restore_lookup_cache_from_archive(char* buffer) {return buffer;}
       71 +  static inline bool is_lookup_cache_enabled() {return false;}
       72 +
       73 +  static bool known_to_not_exist(JNIEnv *env, jobject loader, const char *classname, TRAPS) {return false;}
       74 +  static jobjectArray get_lookup_cache_urls(JNIEnv *env, jobject loader, TRAPS) {return NULL;}
       75 +  static jintArray get_lookup_cache(JNIEnv *env, jobject loader, const char *pkgname, TRAPS) {return NULL;}
  67   76  };
  68   77  
  69   78  #endif // SHARE_VM_CLASSFILE_CLASSLOADEREXT_HPP
    

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