1/* 2 * Copyright (c) 1994, 2014, 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/*- 27 * Implementation of class Class 28 * 29 * former threadruntime.c, Sun Sep 22 12:09:39 1991 30 */ 31 32#include <string.h> 33#include <stdlib.h> 34 35#include "jni.h" 36#include "jni_util.h" 37#include "jvm.h" 38#include "java_lang_Class.h" 39 40/* defined in libverify.so/verify.dll (src file common/check_format.c) */ 41extern jboolean VerifyClassname(char *utf_name, jboolean arrayAllowed); 42extern jboolean VerifyFixClassname(char *utf_name); 43 44#define OBJ "Ljava/lang/Object;" 45#define CLS "Ljava/lang/Class;" 46#define CPL "Ljdk/internal/reflect/ConstantPool;" 47#define STR "Ljava/lang/String;" 48#define FLD "Ljava/lang/reflect/Field;" 49#define MHD "Ljava/lang/reflect/Method;" 50#define CTR "Ljava/lang/reflect/Constructor;" 51#define PD "Ljava/security/ProtectionDomain;" 52#define BA "[B" 53 54static JNINativeMethod methods[] = { 55 {"getName0", "()" STR, (void *)&JVM_GetClassName}, 56 {"getSuperclass", "()" CLS, NULL}, 57 {"getInterfaces0", "()[" CLS, (void *)&JVM_GetClassInterfaces}, 58 {"isInterface", "()Z", (void *)&JVM_IsInterface}, 59 {"getSigners", "()[" OBJ, (void *)&JVM_GetClassSigners}, 60 {"setSigners", "([" OBJ ")V", (void *)&JVM_SetClassSigners}, 61 {"isArray", "()Z", (void *)&JVM_IsArrayClass}, 62 {"isPrimitive", "()Z", (void *)&JVM_IsPrimitiveClass}, 63 {"getModifiers", "()I", (void *)&JVM_GetClassModifiers}, 64 {"getDeclaredFields0","(Z)[" FLD, (void *)&JVM_GetClassDeclaredFields}, 65 {"getDeclaredMethods0","(Z)[" MHD, (void *)&JVM_GetClassDeclaredMethods}, 66 {"getDeclaredConstructors0","(Z)[" CTR, (void *)&JVM_GetClassDeclaredConstructors}, 67 {"getProtectionDomain0", "()" PD, (void *)&JVM_GetProtectionDomain}, 68 {"getDeclaredClasses0", "()[" CLS, (void *)&JVM_GetDeclaredClasses}, 69 {"getDeclaringClass0", "()" CLS, (void *)&JVM_GetDeclaringClass}, 70 {"getSimpleBinaryName0", "()" STR, (void *)&JVM_GetSimpleBinaryName}, 71 {"getGenericSignature0", "()" STR, (void *)&JVM_GetClassSignature}, 72 {"getRawAnnotations", "()" BA, (void *)&JVM_GetClassAnnotations}, 73 {"getConstantPool", "()" CPL, (void *)&JVM_GetClassConstantPool}, 74 {"desiredAssertionStatus0","("CLS")Z",(void *)&JVM_DesiredAssertionStatus}, 75 {"getEnclosingMethod0", "()[" OBJ, (void *)&JVM_GetEnclosingMethodInfo}, 76 {"getRawTypeAnnotations", "()" BA, (void *)&JVM_GetClassTypeAnnotations}, 77}; 78 79#undef OBJ 80#undef CLS 81#undef STR 82#undef FLD 83#undef MHD 84#undef CTR 85#undef PD 86 87JNIEXPORT void JNICALL 88Java_java_lang_Class_registerNatives(JNIEnv *env, jclass cls) 89{ 90 methods[1].fnPtr = (void *)(*env)->GetSuperclass; 91 (*env)->RegisterNatives(env, cls, methods, 92 sizeof(methods)/sizeof(JNINativeMethod)); 93} 94 95JNIEXPORT jclass JNICALL 96Java_java_lang_Class_forName0(JNIEnv *env, jclass this, jstring classname, 97 jboolean initialize, jobject loader, jclass caller) 98{ 99 char *clname; 100 jclass cls = 0; 101 char buf[128]; 102 jsize len; 103 jsize unicode_len; 104 105 if (classname == NULL) { 106 JNU_ThrowNullPointerException(env, 0); 107 return 0; 108 } 109 110 len = (*env)->GetStringUTFLength(env, classname); 111 unicode_len = (*env)->GetStringLength(env, classname); 112 if (len >= (jsize)sizeof(buf)) { 113 clname = malloc(len + 1); 114 if (clname == NULL) { 115 JNU_ThrowOutOfMemoryError(env, NULL); 116 return NULL; 117 } 118 } else { 119 clname = buf; 120 } 121 (*env)->GetStringUTFRegion(env, classname, 0, unicode_len, clname); 122 123 if (VerifyFixClassname(clname) == JNI_TRUE) { 124 /* slashes present in clname, use name b4 translation for exception */ 125 (*env)->GetStringUTFRegion(env, classname, 0, unicode_len, clname); 126 JNU_ThrowClassNotFoundException(env, clname); 127 goto done; 128 } 129 130 if (!VerifyClassname(clname, JNI_TRUE)) { /* expects slashed name */ 131 JNU_ThrowClassNotFoundException(env, clname); 132 goto done; 133 } 134 135 cls = JVM_FindClassFromCaller(env, clname, initialize, loader, caller); 136 137 done: 138 if (clname != buf) { 139 free(clname); 140 } 141 return cls; 142} 143 144JNIEXPORT jboolean JNICALL 145Java_java_lang_Class_isInstance(JNIEnv *env, jobject cls, jobject obj) 146{ 147 if (obj == NULL) { 148 return JNI_FALSE; 149 } 150 return (*env)->IsInstanceOf(env, obj, (jclass)cls); 151} 152 153JNIEXPORT jboolean JNICALL 154Java_java_lang_Class_isAssignableFrom(JNIEnv *env, jobject cls, jobject cls2) 155{ 156 if (cls2 == NULL) { 157 JNU_ThrowNullPointerException(env, 0); 158 return JNI_FALSE; 159 } 160 return (*env)->IsAssignableFrom(env, cls2, cls); 161} 162 163JNIEXPORT jclass JNICALL 164Java_java_lang_Class_getPrimitiveClass(JNIEnv *env, 165 jclass cls, 166 jstring name) 167{ 168 const char *utfName; 169 jclass result; 170 171 if (name == NULL) { 172 JNU_ThrowNullPointerException(env, 0); 173 return NULL; 174 } 175 176 utfName = (*env)->GetStringUTFChars(env, name, 0); 177 if (utfName == 0) 178 return NULL; 179 180 result = JVM_FindPrimitiveClass(env, utfName); 181 182 (*env)->ReleaseStringUTFChars(env, name, utfName); 183 184 return result; 185} 186