1 /* src/native/vm/java_lang_ClassLoader.c - java/lang/ClassLoader
3 Copyright (C) 2007 R. Grafl, A. Krall, C. Kruegel,
4 C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5 E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6 J. Wenninger, Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 $Id: java_lang_VMClass.c 6131 2006-12-06 22:15:57Z twisti $
37 #include "mm/memory.h"
39 #include "vm/global.h" /* required by native headers */
41 #include "native/jni.h"
43 #include "native/include/java_lang_Object.h"
45 #if defined(ENABLE_JAVASE)
46 # include "native/include/java_lang_String.h"/* required by java_lang_Class.h */
47 # include "native/include/java_lang_Class.h"
48 # include "native/include/java_lang_ClassLoader.h"
49 # include "native/include/java_security_ProtectionDomain.h"
52 #include "vm/exceptions.h"
53 #include "vm/stringlocal.h"
55 #include "vmcore/class.h"
56 #include "vmcore/classcache.h"
57 #include "vmcore/options.h"
59 #if defined(ENABLE_STATISTICS)
60 # include "vmcore/statistics.h"
65 * Class: java/lang/ClassLoader
67 * Signature: (Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;)Ljava/lang/Class;
69 java_lang_Class *_Jv_java_lang_ClassLoader_defineClass(java_lang_ClassLoader *cl, java_lang_String *name, java_bytearray *data, s4 offset, s4 len, java_security_ProtectionDomain *pd)
77 #if defined(ENABLE_JVMTI)
78 jint new_class_data_len = 0;
79 unsigned char* new_class_data = NULL;
82 /* check if data was passed */
85 exceptions_throw_nullpointerexception();
89 /* check the indexes passed */
91 if ((offset < 0) || (len < 0) || ((offset + len) > data->header.size)) {
92 exceptions_throw_arrayindexoutofboundsexception();
96 /* add classloader to classloader hashtable */
99 loader = loader_hashtable_classloader_add((java_objectheader *) cl);
102 /* convert '.' to '/' in java string */
104 utfname = javastring_toutf((java_objectheader *) name, true);
106 /* check if this class has already been defined */
108 c = classcache_lookup_defined_or_initiated(cl, utfname);
111 exceptions_throw_linkageerror("duplicate class definition: ", c);
119 #if defined(ENABLE_JVMTI)
120 /* XXX again this will not work because of the indirection cell for classloaders */
122 /* fire Class File Load Hook JVMTI event */
125 jvmti_ClassFileLoadHook(utfname, len, (unsigned char *) data->data,
126 loader, (java_objectheader *) pd,
127 &new_class_data_len, &new_class_data);
130 /* create a new classinfo struct */
132 c = class_create_classinfo(utfname);
134 #if defined(ENABLE_STATISTICS)
137 if (opt_getloadingtime)
141 /* build a classbuffer with the given data */
143 cb = NEW(classbuffer);
145 #if defined(ENABLE_JVMTI)
146 /* check if the JVMTI wants to modify the class */
147 if (new_class_data == NULL) {
150 cb->data = (u1 *) &data->data[offset];
151 #if defined(ENABLE_JVMTI)
153 cb->size = new_class_data_len;
154 cb->data = (u1 *) new_class_data;
159 /* preset the defining classloader */
161 c->classloader = loader;
163 /* load the class from this buffer */
165 r = load_class_from_classbuffer(cb);
169 FREE(cb, classbuffer);
171 #if defined(ENABLE_STATISTICS)
174 if (opt_getloadingtime)
179 /* If return value is NULL, we had a problem and the class is
180 not loaded. Now free the allocated memory, otherwise we
181 could run into a DOS. */
188 /* set ProtectionDomain */
190 co = (java_lang_Class *) c;
194 /* Store the newly defined class in the class cache. This call also */
195 /* checks whether a class of the same name has already been defined by */
196 /* the same defining loader, and if so, replaces the newly created class */
197 /* by the one defined earlier. */
198 /* Important: The classinfo given to classcache_store must be */
199 /* fully prepared because another thread may return this */
200 /* pointer after the lookup at to top of this function */
201 /* directly after the class cache lock has been released. */
203 c = classcache_store(loader, c, true);
205 return (java_lang_Class *) c;
210 * These are local overrides for various environment variables in Emacs.
211 * Please do not remove this and leave it at the end of the file, where
212 * Emacs will automagically detect them.
213 * ---------------------------------------------------------------------
216 * indent-tabs-mode: t
220 * vim:noexpandtab:sw=4:ts=4: