1 /*
2 * Copyright (c) 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #include <jni.h>
25
26 /*
27 * Class: CallWithJNIWeak
28 * Method: testJNIFieldAccessors
29 * Signature: (LCallWithJNIWeak;)V
30 */
31 JNIEXPORT void JNICALL
Java_CallWithJNIWeak_testJNIFieldAccessors(JNIEnv * env,jclass clazz,jobject this)32 Java_CallWithJNIWeak_testJNIFieldAccessors(JNIEnv *env, jclass clazz, jobject this) {
33 // Make sure that we have a weak reference to the receiver
34
35 jweak self = (*env)->NewWeakGlobalRef(env, this);
36
37 jclass this_class = (*env)->GetObjectClass(env, self);
38
39 jclass exception = (*env)->FindClass(env, "java/lang/RuntimeException");
40
41 jfieldID id_i = (*env)->GetFieldID(env, this_class, "i", "I");
42 jfieldID id_j = (*env)->GetFieldID(env, this_class, "j", "J");
43 jfieldID id_z = (*env)->GetFieldID(env, this_class, "z", "Z");
44 jfieldID id_c = (*env)->GetFieldID(env, this_class, "c", "C");
45 jfieldID id_s = (*env)->GetFieldID(env, this_class, "s", "S");
46 jfieldID id_f = (*env)->GetFieldID(env, this_class, "f", "F");
47 jfieldID id_d = (*env)->GetFieldID(env, this_class, "d", "D");
48 jfieldID id_l = (*env)->GetFieldID(env, this_class, "l", "Ljava/lang/Object;");
49 jvalue v;
50
51 #define CHECK(variable, expected) \
52 do { \
53 if ((variable) != (expected)) { \
54 (*env)->ThrowNew(env, exception, #variable" != " #expected); \
55 return; \
56 } \
57 } while(0)
58
59 // The values checked below must be kept in sync with the Java source file.
60
61 v.i = (*env)->GetIntField(env, self, id_i);
62 CHECK(v.i, 1);
63
64 v.j = (*env)->GetLongField(env, self, id_j);
65 CHECK(v.j, 2);
66
67 v.z = (*env)->GetBooleanField(env, self, id_z);
68 CHECK(v.z, JNI_TRUE);
69
70 v.c = (*env)->GetCharField(env, self, id_c);
71 CHECK(v.c, 'a');
72
73 v.s = (*env)->GetShortField(env, self, id_s);
74 CHECK(v.s, 3);
75
76 v.f = (*env)->GetFloatField(env, self, id_f);
77 CHECK(v.f, 1.0f);
78
79 v.d = (*env)->GetDoubleField(env, self, id_d);
80 CHECK(v.d, 2.0);
81
82 #undef CHECK
83
84 v.l = (*env)->GetObjectField(env, self, id_l);
85 if (v.l == NULL) {
86 (*env)->ThrowNew(env, exception, "Object field was null");
87 return;
88 }
89 {
90 jclass clz = (*env)->GetObjectClass(env, v.l);
91 if (!(*env)->IsSameObject(env, clazz, clz)) {
92 (*env)->ThrowNew(env, exception, "Bad object class");
93 }
94 }
95
96 (*env)->DeleteWeakGlobalRef(env, self);
97 }
98
99 /*
100 * Class: CallWithJNIWeak
101 * Method: runTests
102 * Signature: (LCallWithJNIWeak;)V
103 */
104 JNIEXPORT void JNICALL
Java_CallWithJNIWeak_runTests(JNIEnv * env,jclass clazz,jobject this)105 Java_CallWithJNIWeak_runTests(JNIEnv *env, jclass clazz, jobject this) {
106 jweak that = (*env)->NewWeakGlobalRef(env, this);
107 {
108 jmethodID method = (*env)->GetStaticMethodID(env,
109 clazz, "testJNIFieldAccessors", "(LCallWithJNIWeak;)V");
110 (*env)->CallStaticVoidMethod(env, clazz, method, that);
111 if ((*env)->ExceptionCheck(env)) {
112 return;
113 }
114 }
115
116 {
117 jmethodID method = (*env)->GetMethodID(env, clazz, "weakReceiverTest", "()V");
118 (*env)->CallVoidMethod(env, that, method);
119 if ((*env)->ExceptionCheck(env)) {
120 return;
121 }
122 }
123
124 {
125 jmethodID method = (*env)->GetMethodID(env, clazz, "synchonizedWeakReceiverTest", "()V");
126 (*env)->CallVoidMethod(env, that, method);
127 if ((*env)->ExceptionCheck(env)) {
128 return;
129 }
130 }
131 (*env)->DeleteWeakGlobalRef(env, that);
132 }
133
134 /*
135 * Class: CallWithJNIWeak
136 * Method: weakReceiverTest0
137 * Signature: ()V
138 */
139 JNIEXPORT void JNICALL
Java_CallWithJNIWeak_weakReceiverTest0(JNIEnv * env,jobject obj)140 Java_CallWithJNIWeak_weakReceiverTest0(JNIEnv *env, jobject obj) {
141 (*env)->GetObjectClass(env, obj);
142 }
143