src/vm/javaobjects.cpp

   1 /* src/vm/javaobjects.cpp - functions to create and access Java objects
   2
   3    Copyright (C) 2008, 2009 Theobroma Systems Ltd.
   4
   5    This file is part of CACAO.
   6
   7    This program is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU General Public License as
   9    published by the Free Software Foundation; either version 2, or (at
  10    your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20    02110-1301, USA.
  21
  22 */
  23
  24
  25 #include "config.h"
  26
  27 #include <stdint.h>
  28
  29 #include "native/vm/reflection.hpp"
  30
  31 #include "vm/access.hpp"
  32 #include "vm/jit/builtin.hpp"
  33 #include "vm/global.h"
  34 #include "vm/globals.hpp"
  35 #include "vm/initialize.hpp"
  36 #include "vm/javaobjects.hpp"
  37
  38
  39 #if defined(ENABLE_JAVASE)
  40
  41 /**
  42  * Invokes the static Java method getSystemClassLoader().
  43  *
  44  * @return Return value of the invocation or NULL in
  45  * case of an exception.
  46  */
  47 java_handle_t* java_lang_ClassLoader::invoke_getSystemClassLoader()
  48 {
  49         methodinfo    *m;
  50         java_handle_t *clo;
  51         classloader_t *cl;
  52
  53         assert(class_java_lang_Object);
  54         assert(class_java_lang_ClassLoader);
  55         assert(class_java_lang_ClassLoader->state & CLASS_LINKED);
  56
  57         m = class_resolveclassmethod(class_java_lang_ClassLoader,
  58                                                                  utf_getSystemClassLoader,
  59                                                                  utf_void__java_lang_ClassLoader,
  60                                                                  class_java_lang_Object,
  61                                                                  false);
  62
  63         if (m == NULL)
  64                 return NULL;
  65
  66         clo = vm_call_method(m, NULL);
  67
  68         if (clo == NULL)
  69                 return NULL;
  70
  71         cl = loader_hashtable_classloader_add(clo);
  72
  73         return cl;
  74 }
  75
  76
  77 /**
  78  * Constructs a new instance of the class by calling the
  79  * appropriate Java initializer.
  80  */
  81 java_lang_management_MemoryUsage::java_lang_management_MemoryUsage(int64_t init, int64_t used, int64_t commited, int64_t maximum)
  82 {
  83         // Load the class.
  84         // XXX Maybe this should be made global at some points.
  85         classinfo* class_java_lang_management_MemoryUsage;
  86         if (!(class_java_lang_management_MemoryUsage = load_class_bootstrap(utf_new_char("java/lang/management/MemoryUsage"))))
  87                 return;
  88
  89         // Find the appropriate initializer.
  90         // XXX Maybe this should be made global at some points.
  91         methodinfo* m = class_findmethod(class_java_lang_management_MemoryUsage,
  92                                                                          utf_init,
  93                                                                          utf_new_char("(JJJJ)V"));
  94
  95         if (m == NULL)
  96                 return;
  97
  98         // Instantiate a new object.
  99         _handle = builtin_new(class_java_lang_management_MemoryUsage);
 100
 101         if (is_null())
 102                 return;
 103
 104         // Call initializer.
 105         (void) vm_call_method(m, _handle, init, used, commited, maximum);
 106 }
 107
 108
 109 /**
 110  * Constructs a Java object with the given
 111  * java.lang.reflect.Constructor.
 112  *
 113  * @param args     Constructor arguments.
 114  *
 115  * @return Handle to Java object.
 116  */
 117 java_handle_t* java_lang_reflect_Constructor::new_instance(java_handle_objectarray_t* args)
 118 {
 119         methodinfo* m = get_method();
 120
 121         // Should we bypass security the checks (AccessibleObject)?
 122         if (get_override() == false) {
 123                 /* This method is always called like this:
 124                        [0] java.lang.reflect.Constructor.constructNative (Native Method)
 125                        [1] java.lang.reflect.Constructor.newInstance
 126                        [2] <caller>
 127                 */
 128
 129                 if (!access_check_method(m, 2))
 130                         return NULL;
 131         }
 132
 133         // Create a Java object.
 134         java_handle_t* h = builtin_new(m->clazz);
 135
 136         if (h == NULL)
 137                 return NULL;
 138
 139         // Call initializer.
 140         (void) Reflection::invoke(m, h, args);
 141
 142         return h;
 143 }
 144
 145
 146 /**
 147  * Invokes the given method.
 148  *
 149  * @param args Method arguments.
 150  *
 151  * @return return value of the method
 152  */
 153 java_handle_t* java_lang_reflect_Method::invoke(java_handle_t* o, java_handle_objectarray_t* args)
 154 {
 155         methodinfo* m = get_method();
 156
 157         // Should we bypass security the checks (AccessibleObject)?
 158         if (get_override() == false) {
 159 #if defined(WITH_JAVA_RUNTIME_LIBRARY_GNU_CLASSPATH)
 160                 /* This method is always called like this:
 161                        [0] java.lang.reflect.Method.invokeNative (Native Method)
 162                        [1] java.lang.reflect.Method.invoke (Method.java:329)
 163                        [2] <caller>
 164                 */
 165
 166                 if (!access_check_method(m, 2))
 167                         return NULL;
 168 #elif defined(WITH_JAVA_RUNTIME_LIBRARY_OPENJDK)
 169                 /* We only pass 1 here as stacktrace_get_caller_class, which
 170                    is called from access_check_method, skips
 171                    java.lang.reflect.Method.invoke(). */
 172
 173                 if (!access_check_method(m, 1))
 174                         return NULL;
 175 #else
 176 # error unknown classpath configuration
 177 #endif
 178         }
 179
 180         // Check if method class is initialized.
 181         if (!(m->clazz->state & CLASS_INITIALIZED))
 182                 if (!initialize_class(m->clazz))
 183                         return NULL;
 184
 185         // Call the Java method.
 186         java_handle_t* result = Reflection::invoke(m, o, args);
 187
 188         return result;
 189 }
 190
 191 #endif // ENABLE_JAVASE
 192
 193
 194 /*
 195  * These are local overrides for various environment variables in Emacs.
 196  * Please do not remove this and leave it at the end of the file, where
 197  * Emacs will automagically detect them.
 198  * ---------------------------------------------------------------------
 199  * Local variables:
 200  * mode: c++
 201  * indent-tabs-mode: t
 202  * c-basic-offset: 4
 203  * tab-width: 4
 204  * End:
 205  */