1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2018, SAP SE. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #ifndef HOTSPOT_SHARE_OOPS_REFLECTIONACCESSORIMPLKLASSHELPER_HPP
  27 #define HOTSPOT_SHARE_OOPS_REFLECTIONACCESSORIMPLKLASSHELPER_HPP
  28 
  29 #include "memory/allocation.hpp"
  30 
  31 class InstanceKlass;
  32 
  33 // Helper for classes derived from jdk/internal/reflect/{Method|Constructor}AccessorImpl:
  34 // offers convenience functions to extract the names of target class/method/signature
  35 // from the constant pool of these classes.
  36 class ReflectionAccessorImplKlassHelper: public AllStatic {
  37 
  38   // Returns true if k is of type jdk/internal/reflect/GeneratedMethodAccessorXXX.
  39   static bool is_generated_method_accessor(const InstanceKlass* k);
  40 
  41   // Returns true if k is of type jdk/internal/reflect/GeneratedConstructorAccessorXXX.
  42   static bool is_generated_constructor_accessor(const InstanceKlass* k);
  43 
  44   // Returns true if k is of type jdk/internal/reflect/GeneratedSerializationConstructorAccessorXXX.
  45   static bool is_generated_method_serialization_constructor_accessor(const InstanceKlass* k);
  46 
  47   // Assuming k is of type jdk/internal/reflect/Generated{SerializationConstructor|Constructor|Method}AccessorXXX,
  48   // the name of the target class as resource-area allocated string.
  49   static const char* get_target_class_name(const InstanceKlass* k);
  50 
  51   // Assuming k is of type jdk/internal/reflect/Generated{SerializationConstructor|Constructor|Method}AccessorXXX,
  52   // the name of the target method as resource-area allocated string.
  53   static const char* get_target_method_name(const InstanceKlass* k);
  54 
  55   // Assuming k is of type jdk/internal/reflect/Generated{SerializationConstructor|Constructor|Method}AccessorXXX,
  56   // the signature of the target method as resource-area allocated string.
  57   static const char* get_target_method_signature(const InstanceKlass* k);
  58 
  59 public:
  60 
  61   // Returns true if k is of type jdk/internal/reflect/Generated{SerializationConstructor|Constructor|Method}AccessorXXX
  62   // and it is safe to call print_invocation_target(k)
  63   static bool is_generated_accessor(const Klass* k);
  64 
  65   // Assuming k is of type jdk/internal/reflect/Generated{SerializationConstructor|Constructor|Method}AccessorXXX,
  66   // print out target class, method, signature in one line.
  67   static void print_invocation_target(outputStream* out, Klass* k);
  68 
  69 };
  70 
  71 
  72 
  73 
  74 #endif /* HOTSPOT_SHARE_OOPS_REFLECTIONACCESSORIMPLKLASSHELPER_HPP */
  75