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 <pthread.h>
18 
19 #include <cstdio>
20 #include <iostream>
21 #include <vector>
22 
23 #include <android-base/logging.h>
24 
25 #include "art_method-inl.h"
26 #include "base/runtime_debug.h"
27 #include "jni.h"
28 
29 namespace art {
30 
31 static JavaVM* jvm = nullptr;
32 
33 static jint Java_Main_intFastNativeMethod(JNIEnv*, jclass, jint a, jint b, jint c);
34 static jint Java_Main_intCriticalNativeMethod(jint a, jint b, jint c);
35 
36 static JNINativeMethod sMainMethods[] = {
37   {"intFastNativeMethod", "(III)I", reinterpret_cast<void*>(Java_Main_intFastNativeMethod) },
38   {"intCriticalNativeMethod", "(III)I", reinterpret_cast<void*>(Java_Main_intCriticalNativeMethod) },
39 };
40 
JNI_OnLoad(JavaVM * vm,void *)41 extern "C" JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void*) {
42   CHECK(vm != nullptr);
43   CHECK(jvm == nullptr);
44   jvm = vm;
45   std::cout << "JNI_OnLoad called" << std::endl;
46 
47   return JNI_VERSION_1_6;
48 }
49 
JNI_OnUnload(JavaVM *,void *)50 extern "C" JNIEXPORT void JNI_OnUnload(JavaVM*, void*) {
51   // std::cout since LOG(INFO) adds extra stuff like pid.
52   std::cout << "JNI_OnUnload called" << std::endl;
53   // Clear jvm for CHECK in test 004-JniTest.
54   jvm = nullptr;
55 }
56 
AttachHelper(void * arg)57 static void* AttachHelper(void* arg) {
58   CHECK(jvm != nullptr);
59 
60   JNIEnv* env = nullptr;
61   JavaVMAttachArgs args = { JNI_VERSION_1_6, __FUNCTION__, nullptr };
62   int attach_result = jvm->AttachCurrentThread(&env, &args);
63   CHECK_EQ(attach_result, 0);
64 
65   using Fn = void(*)(JNIEnv*);
66   Fn fn = reinterpret_cast<Fn>(arg);
67   fn(env);
68 
69   int detach_result = jvm->DetachCurrentThread();
70   CHECK_EQ(detach_result, 0);
71   return nullptr;
72 }
73 
PthreadHelper(void (* fn)(JNIEnv *))74 static void PthreadHelper(void (*fn)(JNIEnv*)) {
75   pthread_t pthread;
76   int pthread_create_result = pthread_create(&pthread, nullptr, AttachHelper,
77                                              reinterpret_cast<void*>(fn));
78   CHECK_EQ(pthread_create_result, 0);
79   int pthread_join_result = pthread_join(pthread, nullptr);
80   CHECK_EQ(pthread_join_result, 0);
81 }
82 
testFindClassOnAttachedNativeThread(JNIEnv * env)83 static void testFindClassOnAttachedNativeThread(JNIEnv* env) {
84   jclass clazz = env->FindClass("Main");
85   CHECK(clazz != nullptr);
86   CHECK(!env->ExceptionCheck());
87 
88   jobjectArray array = env->NewObjectArray(0, clazz, nullptr);
89   CHECK(array != nullptr);
90   CHECK(!env->ExceptionCheck());
91 }
92 
Java_Main_getFieldSubclass(JNIEnv * env,jclass,jobject f_obj,jclass sub)93 extern "C" JNIEXPORT jint JNICALL Java_Main_getFieldSubclass(JNIEnv* env,
94                                                              jclass,
95                                                              jobject f_obj,
96                                                              jclass sub) {
97   jfieldID f = env->FromReflectedField(f_obj);
98   return env->GetStaticIntField(sub, f);
99 }
100 
101 // http://b/10994325
Java_Main_testFindClassOnAttachedNativeThread(JNIEnv *,jclass)102 extern "C" JNIEXPORT void JNICALL Java_Main_testFindClassOnAttachedNativeThread(JNIEnv*, jclass) {
103   PthreadHelper(&testFindClassOnAttachedNativeThread);
104 }
105 
testFindFieldOnAttachedNativeThread(JNIEnv * env)106 static void testFindFieldOnAttachedNativeThread(JNIEnv* env) {
107   jclass clazz = env->FindClass("Main");
108   CHECK(clazz != nullptr);
109   CHECK(!env->ExceptionCheck());
110 
111   jfieldID field = env->GetStaticFieldID(clazz, "testFindFieldOnAttachedNativeThreadField", "Z");
112   CHECK(field != nullptr);
113   CHECK(!env->ExceptionCheck());
114 
115   env->SetStaticBooleanField(clazz, field, JNI_TRUE);
116 }
117 
Java_Main_testFindFieldOnAttachedNativeThreadNative(JNIEnv *,jclass)118 extern "C" JNIEXPORT void JNICALL Java_Main_testFindFieldOnAttachedNativeThreadNative(JNIEnv*,
119                                                                                       jclass) {
120   PthreadHelper(&testFindFieldOnAttachedNativeThread);
121 }
122 
testReflectFieldGetFromAttachedNativeThread(JNIEnv * env)123 static void testReflectFieldGetFromAttachedNativeThread(JNIEnv* env) {
124   jclass clazz = env->FindClass("Main");
125   CHECK(clazz != nullptr);
126   CHECK(!env->ExceptionCheck());
127 
128   jclass class_clazz = env->FindClass("java/lang/Class");
129   CHECK(class_clazz != nullptr);
130   CHECK(!env->ExceptionCheck());
131 
132   jmethodID getFieldMetodId = env->GetMethodID(class_clazz, "getField",
133                                                "(Ljava/lang/String;)Ljava/lang/reflect/Field;");
134   CHECK(getFieldMetodId != nullptr);
135   CHECK(!env->ExceptionCheck());
136 
137   jstring field_name = env->NewStringUTF("testReflectFieldGetFromAttachedNativeThreadField");
138   CHECK(field_name != nullptr);
139   CHECK(!env->ExceptionCheck());
140 
141   jobject field = env->CallObjectMethod(clazz, getFieldMetodId, field_name);
142   CHECK(field != nullptr);
143   CHECK(!env->ExceptionCheck());
144 
145   jclass field_clazz = env->FindClass("java/lang/reflect/Field");
146   CHECK(field_clazz != nullptr);
147   CHECK(!env->ExceptionCheck());
148 
149   jmethodID getBooleanMetodId = env->GetMethodID(field_clazz, "getBoolean",
150                                                  "(Ljava/lang/Object;)Z");
151   CHECK(getBooleanMetodId != nullptr);
152   CHECK(!env->ExceptionCheck());
153 
154   jboolean value = env->CallBooleanMethod(field, getBooleanMetodId, /* ignored */ clazz);
155   CHECK(value == false);
156   CHECK(!env->ExceptionCheck());
157 }
158 
159 // http://b/15539150
Java_Main_testReflectFieldGetFromAttachedNativeThreadNative(JNIEnv *,jclass)160 extern "C" JNIEXPORT void JNICALL Java_Main_testReflectFieldGetFromAttachedNativeThreadNative(
161     JNIEnv*, jclass) {
162   PthreadHelper(&testReflectFieldGetFromAttachedNativeThread);
163 }
164 
165 
166 // http://b/11243757
Java_Main_testCallStaticVoidMethodOnSubClassNative(JNIEnv * env,jclass)167 extern "C" JNIEXPORT void JNICALL Java_Main_testCallStaticVoidMethodOnSubClassNative(JNIEnv* env,
168                                                                                      jclass) {
169   jclass super_class = env->FindClass("Main$testCallStaticVoidMethodOnSubClass_SuperClass");
170   CHECK(super_class != nullptr);
171 
172   jmethodID execute = env->GetStaticMethodID(super_class, "execute", "()V");
173   CHECK(execute != nullptr);
174 
175   jclass sub_class = env->FindClass("Main$testCallStaticVoidMethodOnSubClass_SubClass");
176   CHECK(sub_class != nullptr);
177 
178   env->CallStaticVoidMethod(sub_class, execute);
179 }
180 
Java_Main_testGetMirandaMethodNative(JNIEnv * env,jclass)181 extern "C" JNIEXPORT jobject JNICALL Java_Main_testGetMirandaMethodNative(JNIEnv* env, jclass) {
182   jclass abstract_class = env->FindClass("Main$testGetMirandaMethod_MirandaAbstract");
183   CHECK(abstract_class != nullptr);
184   jmethodID miranda_method = env->GetMethodID(abstract_class, "inInterface", "()Z");
185   CHECK(miranda_method != nullptr);
186   return env->ToReflectedMethod(abstract_class, miranda_method, JNI_FALSE);
187 }
188 
189 // https://code.google.com/p/android/issues/detail?id=63055
Java_Main_testZeroLengthByteBuffers(JNIEnv * env,jclass)190 extern "C" void JNICALL Java_Main_testZeroLengthByteBuffers(JNIEnv* env, jclass) {
191   std::vector<uint8_t> buffer(1);
192   jobject byte_buffer = env->NewDirectByteBuffer(&buffer[0], 0);
193   CHECK(byte_buffer != nullptr);
194   CHECK(!env->ExceptionCheck());
195 
196   CHECK_EQ(env->GetDirectBufferAddress(byte_buffer), &buffer[0]);
197   CHECK_EQ(env->GetDirectBufferCapacity(byte_buffer), 0);
198 }
199 
200 constexpr size_t kByteReturnSize = 7;
201 jbyte byte_returns[kByteReturnSize] = { 0, 1, 2, 127, -1, -2, -128 };
202 
Java_Main_byteMethod(JNIEnv *,jclass,jbyte b1,jbyte b2,jbyte b3,jbyte b4,jbyte b5,jbyte b6,jbyte b7,jbyte b8,jbyte b9,jbyte b10)203 extern "C" jbyte JNICALL Java_Main_byteMethod(JNIEnv*, jclass, jbyte b1, jbyte b2,
204                                               jbyte b3, jbyte b4, jbyte b5, jbyte b6,
205                                               jbyte b7, jbyte b8, jbyte b9, jbyte b10) {
206   // We use b1 to drive the output.
207   CHECK_EQ(b2, 2);
208   CHECK_EQ(b3, -3);
209   CHECK_EQ(b4, 4);
210   CHECK_EQ(b5, -5);
211   CHECK_EQ(b6, 6);
212   CHECK_EQ(b7, -7);
213   CHECK_EQ(b8, 8);
214   CHECK_EQ(b9, -9);
215   CHECK_EQ(b10, 10);
216 
217   CHECK_LE(0, b1);
218   CHECK_LT(b1, static_cast<jbyte>(kByteReturnSize));
219 
220   return byte_returns[b1];
221 }
222 
223 constexpr size_t kShortReturnSize = 9;
224 jshort short_returns[kShortReturnSize] = { 0, 1, 2, 127, 32767, -1, -2, -128,
225     static_cast<jshort>(0x8000) };
226 // The weird static_cast is because short int is only guaranteed down to -32767, not Java's -32768.
227 
Java_Main_shortMethod(JNIEnv *,jclass,jshort s1,jshort s2,jshort s3,jshort s4,jshort s5,jshort s6,jshort s7,jshort s8,jshort s9,jshort s10)228 extern "C" jshort JNICALL Java_Main_shortMethod(JNIEnv*, jclass, jshort s1, jshort s2,
229                                                 jshort s3, jshort s4, jshort s5, jshort s6,
230                                                 jshort s7, jshort s8, jshort s9, jshort s10) {
231   // We use s1 to drive the output.
232   CHECK_EQ(s2, 2);
233   CHECK_EQ(s3, -3);
234   CHECK_EQ(s4, 4);
235   CHECK_EQ(s5, -5);
236   CHECK_EQ(s6, 6);
237   CHECK_EQ(s7, -7);
238   CHECK_EQ(s8, 8);
239   CHECK_EQ(s9, -9);
240   CHECK_EQ(s10, 10);
241 
242   CHECK_LE(0, s1);
243   CHECK_LT(s1, static_cast<jshort>(kShortReturnSize));
244 
245   return short_returns[s1];
246 }
247 
Java_Main_booleanMethod(JNIEnv *,jclass,jboolean b1,jboolean b2,jboolean b3,jboolean b4,jboolean b5,jboolean b6,jboolean b7,jboolean b8,jboolean b9,jboolean b10)248 extern "C" jboolean JNICALL Java_Main_booleanMethod(JNIEnv*, jclass, jboolean b1,
249                                                     jboolean b2, jboolean b3, jboolean b4,
250                                                     jboolean b5, jboolean b6, jboolean b7,
251                                                     jboolean b8, jboolean b9, jboolean b10) {
252   // We use b1 to drive the output.
253   CHECK_EQ(b2, JNI_TRUE);
254   CHECK_EQ(b3, JNI_FALSE);
255   CHECK_EQ(b4, JNI_TRUE);
256   CHECK_EQ(b5, JNI_FALSE);
257   CHECK_EQ(b6, JNI_TRUE);
258   CHECK_EQ(b7, JNI_FALSE);
259   CHECK_EQ(b8, JNI_TRUE);
260   CHECK_EQ(b9, JNI_FALSE);
261   CHECK_EQ(b10, JNI_TRUE);
262 
263   CHECK(b1 == JNI_TRUE || b1 == JNI_FALSE);
264   return b1;
265 }
266 
267 constexpr size_t kCharReturnSize = 8;
268 jchar char_returns[kCharReturnSize] = { 0, 1, 2, 127, 255, 256, 15000, 34000 };
269 
Java_Main_charMethod(JNIEnv *,jclass,jchar c1,jchar c2,jchar c3,jchar c4,jchar c5,jchar c6,jchar c7,jchar c8,jchar c9,jchar c10)270 extern "C" jchar JNICALL Java_Main_charMethod(JNIEnv*, jclass, jchar c1, jchar c2,
271                                               jchar c3, jchar c4, jchar c5, jchar c6, jchar c7,
272                                               jchar c8, jchar c9, jchar c10) {
273   // We use c1 to drive the output.
274   CHECK_EQ(c2, 'a');
275   CHECK_EQ(c3, 'b');
276   CHECK_EQ(c4, 'c');
277   CHECK_EQ(c5, '0');
278   CHECK_EQ(c6, '1');
279   CHECK_EQ(c7, '2');
280   CHECK_EQ(c8, 1234);
281   CHECK_EQ(c9, 2345);
282   CHECK_EQ(c10, 3456);
283 
284   CHECK_LT(c1, static_cast<jchar>(kCharReturnSize));
285 
286   return char_returns[c1];
287 }
288 
Java_Main_removeLocalObject(JNIEnv * env,jclass,jclass o)289 extern "C" JNIEXPORT void JNICALL Java_Main_removeLocalObject(JNIEnv* env, jclass, jclass o) {
290   // Delete the arg to see if it crashes.
291   env->DeleteLocalRef(o);
292 }
293 
Java_Main_nativeIsAssignableFrom(JNIEnv * env,jclass,jclass from,jclass to)294 extern "C" JNIEXPORT jboolean JNICALL Java_Main_nativeIsAssignableFrom(JNIEnv* env, jclass,
295                                                                        jclass from, jclass to) {
296   return env->IsAssignableFrom(from, to);
297 }
298 
testShallowGetCallingClassLoader(JNIEnv * env)299 static void testShallowGetCallingClassLoader(JNIEnv* env) {
300   // Test direct call.
301   {
302     jclass vmstack_clazz = env->FindClass("dalvik/system/VMStack");
303     CHECK(vmstack_clazz != nullptr);
304     CHECK(!env->ExceptionCheck());
305 
306     jmethodID getCallingClassLoaderMethodId = env->GetStaticMethodID(vmstack_clazz,
307                                                                      "getCallingClassLoader",
308                                                                      "()Ljava/lang/ClassLoader;");
309     CHECK(getCallingClassLoaderMethodId != nullptr);
310     CHECK(!env->ExceptionCheck());
311 
312     jobject class_loader = env->CallStaticObjectMethod(vmstack_clazz,
313                                                        getCallingClassLoaderMethodId);
314     CHECK(class_loader == nullptr);
315     CHECK(!env->ExceptionCheck());
316   }
317 
318   // Test one-level call. Use System.loadLibrary().
319   {
320     jclass system_clazz = env->FindClass("java/lang/System");
321     CHECK(system_clazz != nullptr);
322     CHECK(!env->ExceptionCheck());
323 
324     jmethodID loadLibraryMethodId = env->GetStaticMethodID(system_clazz, "loadLibrary",
325                                                            "(Ljava/lang/String;)V");
326     CHECK(loadLibraryMethodId != nullptr);
327     CHECK(!env->ExceptionCheck());
328 
329     // Create a string object.
330     jobject library_string = env->NewStringUTF("non_existing_library");
331     CHECK(library_string != nullptr);
332     CHECK(!env->ExceptionCheck());
333 
334     env->CallStaticVoidMethod(system_clazz, loadLibraryMethodId, library_string);
335     CHECK(env->ExceptionCheck());
336 
337     // We expect UnsatisfiedLinkError.
338     jthrowable thrown = env->ExceptionOccurred();
339     env->ExceptionClear();
340 
341     jclass unsatisfied_link_error_clazz = env->FindClass("java/lang/UnsatisfiedLinkError");
342     jclass thrown_class = env->GetObjectClass(thrown);
343     CHECK(env->IsSameObject(unsatisfied_link_error_clazz, thrown_class));
344   }
345 }
346 
347 // http://b/16867274
Java_Main_nativeTestShallowGetCallingClassLoader(JNIEnv *,jclass)348 extern "C" JNIEXPORT void JNICALL Java_Main_nativeTestShallowGetCallingClassLoader(JNIEnv*,
349                                                                                    jclass) {
350   PthreadHelper(&testShallowGetCallingClassLoader);
351 }
352 
testShallowGetStackClass2(JNIEnv * env)353 static void testShallowGetStackClass2(JNIEnv* env) {
354   jclass vmstack_clazz = env->FindClass("dalvik/system/VMStack");
355   CHECK(vmstack_clazz != nullptr);
356   CHECK(!env->ExceptionCheck());
357 
358   // Test direct call.
359   {
360     jmethodID getStackClass2MethodId = env->GetStaticMethodID(vmstack_clazz, "getStackClass2",
361                                                               "()Ljava/lang/Class;");
362     CHECK(getStackClass2MethodId != nullptr);
363     CHECK(!env->ExceptionCheck());
364 
365     jobject caller_class = env->CallStaticObjectMethod(vmstack_clazz, getStackClass2MethodId);
366     CHECK(caller_class == nullptr);
367     CHECK(!env->ExceptionCheck());
368   }
369 
370   // Test one-level call. Use VMStack.getStackClass1().
371   {
372     jmethodID getStackClass1MethodId = env->GetStaticMethodID(vmstack_clazz, "getStackClass1",
373                                                               "()Ljava/lang/Class;");
374     CHECK(getStackClass1MethodId != nullptr);
375     CHECK(!env->ExceptionCheck());
376 
377     jobject caller_class = env->CallStaticObjectMethod(vmstack_clazz, getStackClass1MethodId);
378     CHECK(caller_class == nullptr);
379     CHECK(!env->ExceptionCheck());
380   }
381 
382   // For better testing we would need to compile against libcore and have a two-deep stack
383   // ourselves.
384 }
385 
Java_Main_nativeTestShallowGetStackClass2(JNIEnv *,jclass)386 extern "C" JNIEXPORT void JNICALL Java_Main_nativeTestShallowGetStackClass2(JNIEnv*, jclass) {
387   PthreadHelper(&testShallowGetStackClass2);
388 }
389 
390 class JniCallNonvirtualVoidMethodTest {
391  public:
JniCallNonvirtualVoidMethodTest(JNIEnv * env)392   explicit JniCallNonvirtualVoidMethodTest(JNIEnv* env)
393       : env_(env),
394         check_jni_ri_(true),
395         check_jni_android_(true),
396         super_(GetClass("JniCallNonvirtualTest")),
397         sub_(GetClass("JniCallNonvirtualTestSubclass")),
398         super_constructor_(GetMethodID(super_, true, "<init>")),
399         super_static_(GetMethodID(super_, false, "staticMethod")),
400         super_nonstatic_(GetMethodID(super_, true, "nonstaticMethod")),
401         sub_constructor_(GetMethodID(sub_, true, "<init>")),
402         sub_static_(GetMethodID(sub_, false, "staticMethod")),
403         sub_nonstatic_(GetMethodID(sub_, true, "nonstaticMethod")),
404         super_field_(GetFieldID(super_, "nonstaticMethodSuperCalled")),
405         sub_field_(GetFieldID(super_, "nonstaticMethodSubCalled")) {}
406 
Test()407   void Test() {
408     TestStaticCallNonvirtualMethod();
409     TestNewObject();
410     TestnonstaticCallNonvirtualMethod();
411   }
412 
413   JNIEnv* const env_;
414 
415   bool const check_jni_ri_;
416   bool const check_jni_android_;
417 
418   jclass const super_;
419   jclass const sub_;
420 
421   jmethodID const super_constructor_;
422   jmethodID const super_static_;
423   jmethodID const super_nonstatic_;
424   jmethodID const sub_constructor_;
425   jmethodID const sub_static_;
426   jmethodID const sub_nonstatic_;
427 
428   jfieldID const super_field_;
429   jfieldID const sub_field_;
430 
431  private:
GetClass(const char * class_name)432   jclass GetClass(const char* class_name) {
433     jclass c = env_->FindClass(class_name);
434     if (env_->ExceptionCheck()) {
435       env_->ExceptionDescribe();
436       env_->FatalError(__FUNCTION__);
437     }
438     CHECK(!env_->ExceptionCheck());
439     CHECK(c != nullptr);
440     return c;
441   }
442 
GetMethodID(jclass c,bool nonstatic,const char * method_name)443   jmethodID GetMethodID(jclass c, bool nonstatic, const char* method_name) {
444     jmethodID m = ((nonstatic) ?
445                    env_->GetMethodID(c, method_name, "()V") :
446                    env_->GetStaticMethodID(c, method_name, "()V"));
447     if (env_->ExceptionCheck()) {
448       env_->ExceptionDescribe();
449       env_->FatalError(__FUNCTION__);
450     }
451     CHECK(m != nullptr);
452     return m;
453   }
454 
CallConstructor(jclass c,jmethodID m)455   jobject CallConstructor(jclass c, jmethodID m) {
456     jobject o = env_->NewObject(c, m);
457     if (env_->ExceptionCheck()) {
458       env_->ExceptionDescribe();
459       env_->FatalError(__FUNCTION__);
460     }
461     CHECK(o != nullptr);
462     return o;
463   }
464 
CallMethod(jobject o,jclass c,jmethodID m,bool nonstatic,const char * test_case)465   void CallMethod(jobject o, jclass c, jmethodID m, bool nonstatic, const char* test_case) {
466     printf("RUNNING %s\n", test_case);
467     env_->CallNonvirtualVoidMethod(o, c, m);
468     bool exception_check = env_->ExceptionCheck();
469     if (c == nullptr || !nonstatic) {
470       if (!exception_check) {
471         printf("FAILED %s due to missing exception\n", test_case);
472         env_->FatalError("Expected NullPointerException with null jclass");
473       }
474       env_->ExceptionClear();
475     } else if (exception_check) {
476       printf("FAILED %s due to pending exception\n", test_case);
477       env_->ExceptionDescribe();
478       env_->FatalError(test_case);
479     }
480     printf("PASSED %s\n", test_case);
481   }
482 
GetFieldID(jclass c,const char * field_name)483   jfieldID GetFieldID(jclass c, const char* field_name) {
484     jfieldID m = env_->GetFieldID(c, field_name, "Z");
485     if (env_->ExceptionCheck()) {
486       env_->ExceptionDescribe();
487       env_->FatalError(__FUNCTION__);
488     }
489     CHECK(m != nullptr);
490     return m;
491   }
492 
GetBooleanField(jobject o,jfieldID f)493   jboolean GetBooleanField(jobject o, jfieldID f) {
494     jboolean b = env_->GetBooleanField(o, f);
495     if (env_->ExceptionCheck()) {
496       env_->ExceptionDescribe();
497       env_->FatalError(__FUNCTION__);
498     }
499     return b;
500   }
501 
TestStaticCallNonvirtualMethod()502   void TestStaticCallNonvirtualMethod() {
503     if (!check_jni_ri_&& !check_jni_android_) {
504       CallMethod(nullptr, nullptr, super_static_, false, "null object, null class, super static");
505     }
506     if (!check_jni_android_) {
507       CallMethod(nullptr, super_, super_static_, false, "null object, super class, super static");
508     }
509     if (!check_jni_android_) {
510       CallMethod(nullptr, sub_, super_static_, false, "null object, sub class, super static");
511     }
512 
513     if (!check_jni_ri_ && !check_jni_android_) {
514       CallMethod(nullptr, nullptr, sub_static_, false, "null object, null class, sub static");
515     }
516     if (!check_jni_android_) {
517       CallMethod(nullptr, sub_, sub_static_, false, "null object, super class, sub static");
518     }
519     if (!check_jni_android_) {
520       CallMethod(nullptr, super_, sub_static_, false, "null object, super class, sub static");
521     }
522   }
523 
TestNewObject()524   void TestNewObject() {
525     jobject super_super = CallConstructor(super_, super_constructor_);
526     jobject super_sub = CallConstructor(super_, sub_constructor_);
527     jobject sub_super = CallConstructor(sub_, super_constructor_);
528     jobject sub_sub = CallConstructor(sub_, sub_constructor_);
529 
530     CHECK(env_->IsInstanceOf(super_super, super_));
531     CHECK(!env_->IsInstanceOf(super_super, sub_));
532 
533     // Note that even though we called (and ran) the subclass
534     // constructor, we are not the subclass.
535     CHECK(env_->IsInstanceOf(super_sub, super_));
536     CHECK(!env_->IsInstanceOf(super_sub, sub_));
537 
538     // Note that even though we called the superclass constructor, we
539     // are still the subclass.
540     CHECK(env_->IsInstanceOf(sub_super, super_));
541     CHECK(env_->IsInstanceOf(sub_super, sub_));
542 
543     CHECK(env_->IsInstanceOf(sub_sub, super_));
544     CHECK(env_->IsInstanceOf(sub_sub, sub_));
545   }
546 
TestnonstaticCallNonvirtualMethod(bool super_object,bool super_class,bool super_method,const char * test_case)547   void TestnonstaticCallNonvirtualMethod(bool super_object, bool super_class, bool super_method, const char* test_case) {
548     if (check_jni_android_) {
549       if (super_object && !super_method) {
550         return;  // We don't allow a call with sub class method on the super class instance.
551       }
552       if (super_class && !super_method) {
553         return;  // We don't allow a call with the sub class method with the super class argument.
554       }
555     }
556     jobject o = ((super_object) ?
557                  CallConstructor(super_, super_constructor_) :
558                  CallConstructor(sub_, sub_constructor_));
559     jclass c = (super_class) ? super_ : sub_;
560     jmethodID m = (super_method) ? super_nonstatic_ : sub_nonstatic_;
561     CallMethod(o, c, m, true, test_case);
562     jboolean super_field = GetBooleanField(o, super_field_);
563     jboolean sub_field = GetBooleanField(o, sub_field_);
564     CHECK_EQ(super_field, super_method);
565     CHECK_NE(sub_field, super_method);
566   }
567 
TestnonstaticCallNonvirtualMethod()568   void TestnonstaticCallNonvirtualMethod() {
569     TestnonstaticCallNonvirtualMethod(true, true, true, "super object, super class, super nonstatic");
570     TestnonstaticCallNonvirtualMethod(true, false, true, "super object, sub class, super nonstatic");
571     TestnonstaticCallNonvirtualMethod(true, false, false, "super object, sub class, sub nonstatic");
572     TestnonstaticCallNonvirtualMethod(true, true, false, "super object, super class, sub nonstatic");
573 
574     TestnonstaticCallNonvirtualMethod(false, true, true, "sub object, super class, super nonstatic");
575     TestnonstaticCallNonvirtualMethod(false, false, true, "sub object, sub class, super nonstatic");
576     TestnonstaticCallNonvirtualMethod(false, false, false, "sub object, sub class, sub nonstatic");
577     TestnonstaticCallNonvirtualMethod(false, true, false, "sub object, super class, sub nonstatic");
578   }
579 };
580 
Java_Main_testCallNonvirtual(JNIEnv * env,jclass)581 extern "C" void JNICALL Java_Main_testCallNonvirtual(JNIEnv* env, jclass) {
582   JniCallNonvirtualVoidMethodTest(env).Test();
583 }
584 
Java_Main_testNewStringObject(JNIEnv * env,jclass)585 extern "C" JNIEXPORT void JNICALL Java_Main_testNewStringObject(JNIEnv* env, jclass) {
586   jclass c = env->FindClass("java/lang/String");
587   CHECK(c != nullptr);
588 
589   jmethodID mid1 = env->GetMethodID(c, "<init>", "()V");
590   CHECK(mid1 != nullptr);
591   CHECK(!env->ExceptionCheck());
592   jmethodID mid2 = env->GetMethodID(c, "<init>", "([B)V");
593   CHECK(mid2 != nullptr);
594   CHECK(!env->ExceptionCheck());
595   jmethodID mid3 = env->GetMethodID(c, "<init>", "([C)V");
596   CHECK(mid3 != nullptr);
597   CHECK(!env->ExceptionCheck());
598   jmethodID mid4 = env->GetMethodID(c, "<init>", "(Ljava/lang/String;)V");
599   CHECK(mid4 != nullptr);
600   CHECK(!env->ExceptionCheck());
601 
602   const char* test_array = "Test";
603   int byte_array_length = strlen(test_array);
604   jbyteArray byte_array = env->NewByteArray(byte_array_length);
605   env->SetByteArrayRegion(byte_array, 0, byte_array_length, reinterpret_cast<const jbyte*>(test_array));
606 
607   // Test NewObject
608   jstring s = reinterpret_cast<jstring>(env->NewObject(c, mid2, byte_array));
609   CHECK(s != nullptr);
610   CHECK_EQ(env->GetStringLength(s), byte_array_length);
611   CHECK_EQ(env->GetStringUTFLength(s), byte_array_length);
612   const char* chars = env->GetStringUTFChars(s, nullptr);
613   CHECK_EQ(strcmp(test_array, chars), 0);
614   env->ReleaseStringUTFChars(s, chars);
615 
616   // Test AllocObject and Call(Nonvirtual)VoidMethod
617   jstring s1 = reinterpret_cast<jstring>(env->AllocObject(c));
618   CHECK(s1 != nullptr);
619   jstring s2 = reinterpret_cast<jstring>(env->AllocObject(c));
620   CHECK(s2 != nullptr);
621   jstring s3 = reinterpret_cast<jstring>(env->AllocObject(c));
622   CHECK(s3 != nullptr);
623   jstring s4 = reinterpret_cast<jstring>(env->AllocObject(c));
624   CHECK(s4 != nullptr);
625 
626   jcharArray char_array = env->NewCharArray(5);
627   jstring string_arg = env->NewStringUTF("helloworld");
628 
629   // With Var Args
630   env->CallVoidMethod(s1, mid1);
631   env->CallNonvirtualVoidMethod(s2, c, mid2, byte_array);
632 
633   // With JValues
634   jvalue args3[1];
635   args3[0].l = char_array;
636   jvalue args4[1];
637   args4[0].l = string_arg;
638   env->CallVoidMethodA(s3, mid3, args3);
639   env->CallNonvirtualVoidMethodA(s4, c, mid4, args4);
640 
641   // Test with global and weak global references
642   jstring s5 = reinterpret_cast<jstring>(env->AllocObject(c));
643   CHECK(s5 != nullptr);
644   s5 = reinterpret_cast<jstring>(env->NewGlobalRef(s5));
645   jstring s6 = reinterpret_cast<jstring>(env->AllocObject(c));
646   CHECK(s6 != nullptr);
647   s6 = reinterpret_cast<jstring>(env->NewWeakGlobalRef(s6));
648 
649   env->CallVoidMethod(s5, mid1);
650   env->CallNonvirtualVoidMethod(s6, c, mid2, byte_array);
651   CHECK_EQ(env->GetStringLength(s5), 0);
652   CHECK_EQ(env->GetStringLength(s6), byte_array_length);
653   const char* chars6 = env->GetStringUTFChars(s6, nullptr);
654   CHECK_EQ(strcmp(test_array, chars6), 0);
655   env->ReleaseStringUTFChars(s6, chars6);
656 }
657 
Java_Main_testGetMethodID(JNIEnv * env,jclass,jclass c)658 extern "C" JNIEXPORT jlong JNICALL Java_Main_testGetMethodID(JNIEnv* env, jclass, jclass c) {
659   return reinterpret_cast<jlong>(env->GetMethodID(c, "a", "()V"));
660 }
661 
Java_Main_enterJniCriticalSection(JNIEnv * env,jclass,jint arraySize,jbyteArray array0,jbyteArray array1)662 extern "C" JNIEXPORT void JNICALL Java_Main_enterJniCriticalSection(JNIEnv* env, jclass,
663                                                                     jint arraySize,
664                                                                     jbyteArray array0,
665                                                                     jbyteArray array1) {
666   for (int i = 0; i < 50000; ++i) {
667     char* data0 = reinterpret_cast<char*>(env->GetPrimitiveArrayCritical(array0, nullptr));
668     char* data1 = reinterpret_cast<char*>(env->GetPrimitiveArrayCritical(array1, nullptr));
669     bool up = i % 2 == 0;
670     for (int j = 0; j < arraySize; ++j) {
671       if (up) {
672         data1[j] = data0[j] + 1;
673       } else {
674         data0[j] = data1[j] + 1;
675       }
676     }
677     env->ReleasePrimitiveArrayCritical(array1, data1, 0);
678     env->ReleasePrimitiveArrayCritical(array0, data0, 0);
679   }
680 }
681 
682 class JniCallDefaultMethodsTest {
683  public:
JniCallDefaultMethodsTest(JNIEnv * env)684   explicit JniCallDefaultMethodsTest(JNIEnv* env)
685       : env_(env), concrete_class_(env_->FindClass("ConcreteClass")) {
686     CHECK(!env_->ExceptionCheck());
687     CHECK(concrete_class_ != nullptr);
688   }
689 
Test()690   void Test() {
691     TestCalls("ConcreteClass", { "JniCallNonOverridenDefaultMethod",
692                                  "JniCallOverridenDefaultMethod",
693                                  "JniCallOverridenDefaultMethodWithSuper",
694                                  "JniCallOverridenAbstractMethod",
695                                  "JniCallConflictDefaultMethod",
696                                  "JniCallSoftConflictMethod" });
697     TestCalls("DefaultInterface", { "JniCallNonOverridenDefaultMethod",
698                                     "JniCallOverridenDefaultMethod",
699                                     "JniCallOverridenAbstractMethod",
700                                     "JniCallConflictDefaultMethod",
701                                     "JniCallSoftConflictMethod" });
702     TestCalls("AbstractInterface", { "JniCallSoftConflictMethod" });
703     TestCalls("ConflictInterface", { "JniCallConflictDefaultMethod" });
704   }
705 
706  private:
TestCalls(const char * declaring_class,const std::vector<const char * > & methods)707   void TestCalls(const char* declaring_class, const std::vector<const char*>& methods) {
708     jmethodID new_method = env_->GetMethodID(concrete_class_, "<init>", "()V");
709     jobject obj = env_->NewObject(concrete_class_, new_method);
710     CHECK(!env_->ExceptionCheck());
711     CHECK(obj != nullptr);
712     jclass decl_class = env_->FindClass(declaring_class);
713     CHECK(!env_->ExceptionCheck());
714     CHECK(decl_class != nullptr);
715     for (const char* method : methods) {
716       jmethodID method_id = env_->GetMethodID(decl_class, method, "()V");
717       CHECK(!env_->ExceptionCheck());
718       printf("Calling method %s->%s on object of type ConcreteClass\n", declaring_class, method);
719       env_->CallVoidMethod(obj, method_id);
720       if (env_->ExceptionCheck()) {
721         jthrowable thrown = env_->ExceptionOccurred();
722         env_->ExceptionClear();
723         jmethodID to_string = env_->GetMethodID(
724             env_->FindClass("java/lang/Object"), "toString", "()Ljava/lang/String;");
725         jstring exception_string = (jstring) env_->CallObjectMethod(thrown, to_string);
726         CHECK(!env_->ExceptionCheck());
727         const char* exception_string_utf8 = env_->GetStringUTFChars(exception_string, nullptr);
728         CHECK(!env_->ExceptionCheck());
729         CHECK(exception_string_utf8 != nullptr);
730         printf("EXCEPTION OCCURED: %s\n", exception_string_utf8);
731         env_->ReleaseStringUTFChars(exception_string, exception_string_utf8);
732       }
733     }
734   }
735 
736   JNIEnv* env_;
737   jclass concrete_class_;
738 };
739 
Java_Main_testCallDefaultMethods(JNIEnv * env)740 extern "C" JNIEXPORT void JNICALL Java_Main_testCallDefaultMethods(JNIEnv* env) {
741   JniCallDefaultMethodsTest(env).Test();
742 }
743 
InvokeSpecificMethod(JNIEnv * env,jobject obj,const char * method)744 static void InvokeSpecificMethod(JNIEnv* env, jobject obj, const char* method) {
745   jclass lambda_class = env->FindClass("LambdaInterface");
746   CHECK(!env->ExceptionCheck());
747   CHECK(lambda_class != nullptr);
748   jmethodID method_id = env->GetMethodID(lambda_class, method, "()V");
749   CHECK(!env->ExceptionCheck());
750   env->CallVoidMethod(obj, method_id);
751   CHECK(!env->ExceptionCheck());
752 }
753 
Java_Main_testInvokeLambdaDefaultMethod(JNIEnv * e,jclass,jobject l)754 extern "C" JNIEXPORT void JNICALL Java_Main_testInvokeLambdaDefaultMethod(
755     JNIEnv* e, jclass, jobject l) {
756   InvokeSpecificMethod(e, l, "sayHiTwice");
757 }
758 
Java_Main_testInvokeLambdaMethod(JNIEnv * e,jclass,jobject l)759 extern "C" JNIEXPORT void JNICALL Java_Main_testInvokeLambdaMethod(JNIEnv* e, jclass, jobject l) {
760   InvokeSpecificMethod(e, l, "sayHi");
761 }
762 
763 // Register on-demand because many tests share this JNI library and
764 // we can't unconditionally register them.
Java_Main_registerNativesJniTest(JNIEnv * e,jclass kls)765 extern "C" JNIEXPORT jboolean JNICALL Java_Main_registerNativesJniTest(JNIEnv* e, jclass kls) {
766   const size_t numMethods = sizeof(sMainMethods)/sizeof(JNINativeMethod);
767 
768   if (e->RegisterNatives(kls, sMainMethods, numMethods) < 0) {
769       std::cerr << "RegisterNatives failed for 'Main'" << std::endl;
770       return JNI_FALSE;
771   }
772 
773   return JNI_TRUE;
774 }
775 
776 // Annotated with @FastNative in Java code. Doesn't need to be explicitly registered with "!".
777 // NOTE: Has to be registered explicitly to avoid mutator lock check failures.
Java_Main_intFastNativeMethod(JNIEnv *,jclass,jint a,jint b,jint c)778 static jint Java_Main_intFastNativeMethod(JNIEnv*, jclass, jint a, jint b, jint c) {
779   return a + b + c;
780 }
781 
782 // Annotated with @CriticalNative in Java code. Doesn't need to be explicitly registered with "!".
783 // NOTE: Has to be registered explicitly to avoid mutator lock check failures.
Java_Main_intCriticalNativeMethod(jint a,jint b,jint c)784 static jint Java_Main_intCriticalNativeMethod(jint a, jint b, jint c) {
785   // Note that unlike a "Fast Native" method this excludes JNIEnv and the jclass parameters.
786   return a + b + c;
787 }
788 
Java_Main_lookupClinit(JNIEnv * env,jclass,jclass kls)789 extern "C" JNIEXPORT jobject JNICALL Java_Main_lookupClinit(JNIEnv* env, jclass, jclass kls) {
790   jmethodID clinit_id = env->GetStaticMethodID(kls, "<clinit>", "()V");
791 
792   if (clinit_id != nullptr) {
793     jobject obj = env->ToReflectedMethod(kls, clinit_id, /*isStatic*/ true);
794     CHECK(obj != nullptr);
795     return obj;
796   } else {
797     return nullptr;
798   }
799 }
800 
Java_Main_isSlowDebug(JNIEnv *,jclass)801 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isSlowDebug(JNIEnv*, jclass) {
802   // Return whether slow-debug is on. Only relevant for debug builds.
803   if (kIsDebugBuild) {
804     // Register a fake flag and get the default value it should be initialized with.
805     static bool fake_flag = false;
806     fake_flag = RegisterRuntimeDebugFlag(&fake_flag);
807 
808     return fake_flag ? JNI_TRUE : JNI_FALSE;
809   }
810   // To pass the Java-side test, just so "on" for release builds.
811   return JNI_TRUE;
812 }
813 
814 }  // namespace art
815 
816