1 /* 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include <stdlib.h> 27 28 #include "jni.h" 29 #include "jni_util.h" 30 31 #include "java_lang_reflect_Proxy.h" 32 33 /* defined in libverify.so/verify.dll (src file common/check_format.c) */ 34 extern jboolean VerifyFixClassname(char *utf_name); 35 36 /* 37 * Class: java_lang_reflect_Proxy 38 * Method: defineClass0 39 * Signature: (Ljava/lang/ClassLoader;Ljava/lang/String;[BII)Ljava/lang/Class; 40 * 41 * The implementation of this native static method is a copy of that of 42 * the native instance method Java_java_lang_ClassLoader_defineClass0() 43 * with the implicit "this" parameter becoming the "loader" parameter. 44 */ 45 JNIEXPORT jclass JNICALL 46 Java_java_lang_reflect_Proxy_defineClass0(JNIEnv *env, 47 jclass ignore, 48 jobject loader, 49 jstring name, 50 jbyteArray data, 51 jint offset, 52 jint length) 53 { 54 jbyte *body; 55 char *utfName; 56 jclass result = 0; 57 char buf[128]; 58 59 if (data == NULL) { 60 JNU_ThrowNullPointerException(env, 0); 61 return 0; 62 } 63 64 /* Work around 4153825. malloc crashes on Solaris when passed a 65 * negative size. 66 */ 67 if (length < 0) { 68 JNU_ThrowArrayIndexOutOfBoundsException(env, 0); 69 return 0; 70 } 71 72 body = (jbyte *)malloc(length); 73 74 if (body == 0) { 75 JNU_ThrowOutOfMemoryError(env, 0); 76 return 0; 77 } 78 79 (*env)->GetByteArrayRegion(env, data, offset, length, body); 80 81 if ((*env)->ExceptionOccurred(env)) 82 goto free_body; 83 84 if (name != NULL) { 85 jsize len = (*env)->GetStringUTFLength(env, name); 86 jsize unicode_len = (*env)->GetStringLength(env, name); 87 if (len >= (jsize)sizeof(buf)) { 88 utfName = malloc(len + 1); 89 if (utfName == NULL) { 90 JNU_ThrowOutOfMemoryError(env, NULL); 91 goto free_body; 92 } 93 } else { 94 utfName = buf; 95 } 96 (*env)->GetStringUTFRegion(env, name, 0, unicode_len, utfName); 97 VerifyFixClassname(utfName); 98 } else { 99 utfName = NULL; 100 } 101 102 result = (*env)->DefineClass(env, utfName, loader, body, length); 103 104 if (utfName && utfName != buf) 105 free(utfName); 106 107 free_body: 108 free(body); 109 return result; 110 }