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 */
31JNIEXPORT void JNICALL
32Java_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 */
104JNIEXPORT void JNICALL
105Java_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 */
139JNIEXPORT void JNICALL
140Java_CallWithJNIWeak_weakReceiverTest0(JNIEnv *env, jobject obj) {
141  (*env)->GetObjectClass(env, obj);
142}
143