1/*
2 * Copyright (c) 1995, 2017, 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 "jni.h"
27#include "jni_util.h"
28#include "jvm.h"
29
30#include "java_lang_SecurityManager.h"
31#include "java_lang_ClassLoader.h"
32
33/*
34 * Make sure a security manager instance is initialized.
35 * TRUE means OK, FALSE means not.
36 */
37static jboolean
38check(JNIEnv *env, jobject this)
39{
40 static jfieldID initField = 0;
41 jboolean initialized = JNI_FALSE;
42
43 if (initField == 0) {
44 jclass clazz = (*env)->FindClass(env, "java/lang/SecurityManager");
45 if (clazz == 0) {
46 (*env)->ExceptionClear(env);
47 return JNI_FALSE;
48 }
49 initField = (*env)->GetFieldID(env, clazz, "initialized", "Z");
50 if (initField == 0) {
51 (*env)->ExceptionClear(env);
52 return JNI_FALSE;
53 }
54 }
55 initialized = (*env)->GetBooleanField(env, this, initField);
56
57 if (initialized == JNI_TRUE) {
58 return JNI_TRUE;
59 } else {
60 jclass securityException =
61 (*env)->FindClass(env, "java/lang/SecurityException");
62 if (securityException != 0) {
63 (*env)->ThrowNew(env, securityException,
64 "security manager not initialized.");
65 }
66 return JNI_FALSE;
67 }
68}
69
70JNIEXPORT jobjectArray JNICALL
71Java_java_lang_SecurityManager_getClassContext(JNIEnv *env, jobject this)
72{
73 if (!check(env, this)) {
74 return NULL; /* exception */
75 }
76
77 return JVM_GetClassContext(env);
78}
79