jni_test.cc revision 61bf6a1c80bf797af5d7911ff71fc367fdb36742 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <assert.h>
18#include <stdio.h>
19#include <pthread.h>
20#include <vector>
21
22#include "jni.h"
23
24#if defined(NDEBUG)
25#error test code compiled without NDEBUG
26#endif
27
28static JavaVM* jvm = NULL;
29
30extern "C" JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void *) {
31  assert(vm != nullptr);
32  assert(jvm == nullptr);
33  jvm = vm;
34  return JNI_VERSION_1_6;
35}
36
37static void* AttachHelper(void* arg) {
38  assert(jvm != nullptr);
39
40  JNIEnv* env = nullptr;
41  JavaVMAttachArgs args = { JNI_VERSION_1_6, __FUNCTION__, NULL };
42  int attach_result = jvm->AttachCurrentThread(&env, &args);
43  assert(attach_result == 0);
44
45  typedef void (*Fn)(JNIEnv*);
46  Fn fn = reinterpret_cast<Fn>(arg);
47  fn(env);
48
49  int detach_result = jvm->DetachCurrentThread();
50  assert(detach_result == 0);
51  return nullptr;
52}
53
54static void PthreadHelper(void (*fn)(JNIEnv*)) {
55  pthread_t pthread;
56  int pthread_create_result = pthread_create(&pthread, nullptr, AttachHelper,
57                                             reinterpret_cast<void*>(fn));
58  assert(pthread_create_result == 0);
59  int pthread_join_result = pthread_join(pthread, nullptr);
60  assert(pthread_join_result == 0);
61}
62
63static void testFindClassOnAttachedNativeThread(JNIEnv* env) {
64  jclass clazz = env->FindClass("Main");
65  assert(clazz != nullptr);
66  assert(!env->ExceptionCheck());
67
68  jobjectArray array = env->NewObjectArray(0, clazz, nullptr);
69  assert(array != nullptr);
70  assert(!env->ExceptionCheck());
71}
72
73// http://b/10994325
74extern "C" JNIEXPORT void JNICALL Java_Main_testFindClassOnAttachedNativeThread(JNIEnv*, jclass) {
75  PthreadHelper(&testFindClassOnAttachedNativeThread);
76}
77
78static void testFindFieldOnAttachedNativeThread(JNIEnv* env) {
79  jclass clazz = env->FindClass("Main");
80  assert(clazz != nullptr);
81  assert(!env->ExceptionCheck());
82
83  jfieldID field = env->GetStaticFieldID(clazz, "testFindFieldOnAttachedNativeThreadField", "Z");
84  assert(field != nullptr);
85  assert(!env->ExceptionCheck());
86
87  env->SetStaticBooleanField(clazz, field, JNI_TRUE);
88}
89
90extern "C" JNIEXPORT void JNICALL Java_Main_testFindFieldOnAttachedNativeThreadNative(JNIEnv*,
91                                                                                      jclass) {
92  PthreadHelper(&testFindFieldOnAttachedNativeThread);
93}
94
95static void testReflectFieldGetFromAttachedNativeThread(JNIEnv* env) {
96  jclass clazz = env->FindClass("Main");
97  assert(clazz != nullptr);
98  assert(!env->ExceptionCheck());
99
100  jclass class_clazz = env->FindClass("java/lang/Class");
101  assert(class_clazz != nullptr);
102  assert(!env->ExceptionCheck());
103
104  jmethodID getFieldMetodId = env->GetMethodID(class_clazz, "getField",
105                                               "(Ljava/lang/String;)Ljava/lang/reflect/Field;");
106  assert(getFieldMetodId != nullptr);
107  assert(!env->ExceptionCheck());
108
109  jstring field_name = env->NewStringUTF("testReflectFieldGetFromAttachedNativeThreadField");
110  assert(field_name != nullptr);
111  assert(!env->ExceptionCheck());
112
113  jobject field = env->CallObjectMethod(clazz, getFieldMetodId, field_name);
114  assert(field != nullptr);
115  assert(!env->ExceptionCheck());
116
117  jclass field_clazz = env->FindClass("java/lang/reflect/Field");
118  assert(field_clazz != nullptr);
119  assert(!env->ExceptionCheck());
120
121  jmethodID getBooleanMetodId = env->GetMethodID(field_clazz, "getBoolean",
122                                                 "(Ljava/lang/Object;)Z");
123  assert(getBooleanMetodId != nullptr);
124  assert(!env->ExceptionCheck());
125
126  jboolean value = env->CallBooleanMethod(field, getBooleanMetodId, /* ignored */ clazz);
127  assert(value == false);
128  assert(!env->ExceptionCheck());
129}
130
131// http://b/15539150
132extern "C" JNIEXPORT void JNICALL Java_Main_testReflectFieldGetFromAttachedNativeThreadNative(
133    JNIEnv*, jclass) {
134  PthreadHelper(&testReflectFieldGetFromAttachedNativeThread);
135}
136
137
138// http://b/11243757
139extern "C" JNIEXPORT void JNICALL Java_Main_testCallStaticVoidMethodOnSubClassNative(JNIEnv* env,
140                                                                                     jclass) {
141  jclass super_class = env->FindClass("Main$testCallStaticVoidMethodOnSubClass_SuperClass");
142  assert(super_class != nullptr);
143
144  jmethodID execute = env->GetStaticMethodID(super_class, "execute", "()V");
145  assert(execute != nullptr);
146
147  jclass sub_class = env->FindClass("Main$testCallStaticVoidMethodOnSubClass_SubClass");
148  assert(sub_class != nullptr);
149
150  env->CallStaticVoidMethod(sub_class, execute);
151}
152
153extern "C" JNIEXPORT jobject JNICALL Java_Main_testGetMirandaMethodNative(JNIEnv* env, jclass) {
154  jclass abstract_class = env->FindClass("Main$testGetMirandaMethod_MirandaAbstract");
155  assert(abstract_class != nullptr);
156  jmethodID miranda_method = env->GetMethodID(abstract_class, "inInterface", "()Z");
157  assert(miranda_method != nullptr);
158  return env->ToReflectedMethod(abstract_class, miranda_method, JNI_FALSE);
159}
160
161// https://code.google.com/p/android/issues/detail?id=63055
162extern "C" void JNICALL Java_Main_testZeroLengthByteBuffers(JNIEnv* env, jclass) {
163  std::vector<uint8_t> buffer(1);
164  jobject byte_buffer = env->NewDirectByteBuffer(&buffer[0], 0);
165  assert(byte_buffer != nullptr);
166  assert(!env->ExceptionCheck());
167
168  assert(env->GetDirectBufferAddress(byte_buffer) == &buffer[0]);
169  assert(env->GetDirectBufferCapacity(byte_buffer) == 0);
170}
171
172constexpr size_t kByteReturnSize = 7;
173jbyte byte_returns[kByteReturnSize] = { 0, 1, 2, 127, -1, -2, -128 };
174
175extern "C" jbyte JNICALL Java_Main_byteMethod(JNIEnv* env, jclass klass, jbyte b1, jbyte b2,
176                                              jbyte b3, jbyte b4, jbyte b5, jbyte b6,
177                                              jbyte b7, jbyte b8, jbyte b9, jbyte b10) {
178  // We use b1 to drive the output.
179  assert(b2 == 2);
180  assert(b3 == -3);
181  assert(b4 == 4);
182  assert(b5 == -5);
183  assert(b6 == 6);
184  assert(b7 == -7);
185  assert(b8 == 8);
186  assert(b9 == -9);
187  assert(b10 == 10);
188
189  assert(0 <= b1);
190  assert(b1 < static_cast<jbyte>(kByteReturnSize));
191
192  return byte_returns[b1];
193}
194
195constexpr size_t kShortReturnSize = 9;
196jshort short_returns[kShortReturnSize] = { 0, 1, 2, 127, 32767, -1, -2, -128,
197    static_cast<jshort>(0x8000) };
198// The weird static_cast is because short int is only guaranteed down to -32767, not Java's -32768.
199
200extern "C" jshort JNICALL Java_Main_shortMethod(JNIEnv* env, jclass klass, jshort s1, jshort s2,
201                                                jshort s3, jshort s4, jshort s5, jshort s6,
202                                                jshort s7, jshort s8, jshort s9, jshort s10) {
203  // We use s1 to drive the output.
204  assert(s2 == 2);
205  assert(s3 == -3);
206  assert(s4 == 4);
207  assert(s5 == -5);
208  assert(s6 == 6);
209  assert(s7 == -7);
210  assert(s8 == 8);
211  assert(s9 == -9);
212  assert(s10 == 10);
213
214  assert(0 <= s1);
215  assert(s1 < static_cast<jshort>(kShortReturnSize));
216
217  return short_returns[s1];
218}
219
220extern "C" jboolean JNICALL Java_Main_booleanMethod(JNIEnv* env, jclass klass, jboolean b1,
221                                                    jboolean b2, jboolean b3, jboolean b4,
222                                                    jboolean b5, jboolean b6, jboolean b7,
223                                                    jboolean b8, jboolean b9, jboolean b10) {
224  // We use b1 to drive the output.
225  assert(b2 == JNI_TRUE);
226  assert(b3 == JNI_FALSE);
227  assert(b4 == JNI_TRUE);
228  assert(b5 == JNI_FALSE);
229  assert(b6 == JNI_TRUE);
230  assert(b7 == JNI_FALSE);
231  assert(b8 == JNI_TRUE);
232  assert(b9 == JNI_FALSE);
233  assert(b10 == JNI_TRUE);
234
235  assert(b1 == JNI_TRUE || b1 == JNI_FALSE);
236  return b1;
237}
238
239constexpr size_t kCharReturnSize = 8;
240jchar char_returns[kCharReturnSize] = { 0, 1, 2, 127, 255, 256, 15000, 34000 };
241
242extern "C" jchar JNICALL Java_Main_charMethod(JNIEnv* env, jclass klacc, jchar c1, jchar c2,
243                                              jchar c3, jchar c4, jchar c5, jchar c6, jchar c7,
244                                              jchar c8, jchar c9, jchar c10) {
245  // We use c1 to drive the output.
246  assert(c2 == 'a');
247  assert(c3 == 'b');
248  assert(c4 == 'c');
249  assert(c5 == '0');
250  assert(c6 == '1');
251  assert(c7 == '2');
252  assert(c8 == 1234);
253  assert(c9 == 2345);
254  assert(c10 == 3456);
255
256  assert(c1 < static_cast<jchar>(kCharReturnSize));
257
258  return char_returns[c1];
259}
260
261extern "C" JNIEXPORT jboolean JNICALL Java_Main_nativeIsAssignableFrom(JNIEnv* env, jclass,
262                                                                       jclass from, jclass to) {
263  return env->IsAssignableFrom(from, to);
264}
265
266static void testShallowGetCallingClassLoader(JNIEnv* env) {
267  // Test direct call.
268  {
269    jclass vmstack_clazz = env->FindClass("dalvik/system/VMStack");
270    assert(vmstack_clazz != nullptr);
271    assert(!env->ExceptionCheck());
272
273    jmethodID getCallingClassLoaderMethodId = env->GetStaticMethodID(vmstack_clazz,
274                                                                     "getCallingClassLoader",
275                                                                     "()Ljava/lang/ClassLoader;");
276    assert(getCallingClassLoaderMethodId != nullptr);
277    assert(!env->ExceptionCheck());
278
279    jobject class_loader = env->CallStaticObjectMethod(vmstack_clazz,
280                                                       getCallingClassLoaderMethodId);
281    assert(class_loader == nullptr);
282    assert(!env->ExceptionCheck());
283  }
284
285  // Test one-level call. Use System.loadLibrary().
286  {
287    jclass system_clazz = env->FindClass("java/lang/System");
288    assert(system_clazz != nullptr);
289    assert(!env->ExceptionCheck());
290
291    jmethodID loadLibraryMethodId = env->GetStaticMethodID(system_clazz, "loadLibrary",
292                                                           "(Ljava/lang/String;)V");
293    assert(loadLibraryMethodId != nullptr);
294    assert(!env->ExceptionCheck());
295
296    // Create a string object.
297    jobject library_string = env->NewStringUTF("arttest");
298    assert(library_string != nullptr);
299    assert(!env->ExceptionCheck());
300
301    env->CallStaticVoidMethod(system_clazz, loadLibraryMethodId, library_string);
302    if (env->ExceptionCheck()) {
303      // At most we expect UnsatisfiedLinkError.
304      jthrowable thrown = env->ExceptionOccurred();
305      env->ExceptionClear();
306
307      jclass unsatisfied_link_error_clazz = env->FindClass("java/lang/UnsatisfiedLinkError");
308      jclass thrown_class = env->GetObjectClass(thrown);
309      assert(env->IsSameObject(unsatisfied_link_error_clazz, thrown_class));
310    }
311  }
312}
313
314// http://b/16867274
315extern "C" JNIEXPORT void JNICALL Java_Main_nativeTestShallowGetCallingClassLoader(JNIEnv* env,
316                                                                                   jclass) {
317  PthreadHelper(&testShallowGetCallingClassLoader);
318}
319