Home | History | Annotate | Download | only in 004-JniTest 
      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 
     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 
     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 
     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   typedef void (*Fn)(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 
     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 
     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 
     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
    102 extern "C" JNIEXPORT void JNICALL Java_Main_testFindClassOnAttachedNativeThread(JNIEnv*, jclass) {
    103   PthreadHelper(&testFindClassOnAttachedNativeThread);
    104 }
    105 
    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 
    118 extern "C" JNIEXPORT void JNICALL Java_Main_testFindFieldOnAttachedNativeThreadNative(JNIEnv*,
    119                                                                                       jclass) {
    120   PthreadHelper(&testFindFieldOnAttachedNativeThread);
    121 }
    122 
    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
    160 extern "C" JNIEXPORT void JNICALL Java_Main_testReflectFieldGetFromAttachedNativeThreadNative(
    161     JNIEnv*, jclass) {
    162   PthreadHelper(&testReflectFieldGetFromAttachedNativeThread);
    163 }
    164 
    165 
    166 // http://b/11243757
    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 
    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
    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 
    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 
    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 
    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 
    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 
    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 
    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 
    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
    348 extern "C" JNIEXPORT void JNICALL Java_Main_nativeTestShallowGetCallingClassLoader(JNIEnv*,
    349                                                                                    jclass) {
    350   PthreadHelper(&testShallowGetCallingClassLoader);
    351 }
    352 
    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 
    386 extern "C" JNIEXPORT void JNICALL Java_Main_nativeTestShallowGetStackClass2(JNIEnv*, jclass) {
    387   PthreadHelper(&testShallowGetStackClass2);
    388 }
    389 
    390 class JniCallNonvirtualVoidMethodTest {
    391  public:
    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 
    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:
    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 
    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 
    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 
    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 
    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 
    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 
    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 
    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 
    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 
    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 
    581 extern "C" void JNICALL Java_Main_testCallNonvirtual(JNIEnv* env, jclass) {
    582   JniCallNonvirtualVoidMethodTest(env).Test();
    583 }
    584 
    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 
    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 
    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:
    684   explicit JniCallDefaultMethodsTest(JNIEnv* env)
    685       : env_(env), concrete_class_(env_->FindClass("ConcreteClass")) {
    686     CHECK(!env_->ExceptionCheck());
    687     CHECK(concrete_class_ != nullptr);
    688   }
    689 
    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:
    707   void TestCalls(const char* declaring_class, 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 
    740 extern "C" JNIEXPORT void JNICALL Java_Main_testCallDefaultMethods(JNIEnv* env) {
    741   JniCallDefaultMethodsTest(env).Test();
    742 }
    743 
    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 
    754 extern "C" JNIEXPORT void JNICALL Java_Main_testInvokeLambdaDefaultMethod(
    755     JNIEnv* e, jclass, jobject l) {
    756   InvokeSpecificMethod(e, l, "sayHiTwice");
    757 }
    758 
    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.
    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.
    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.
    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 
    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 
    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 dummy flag and get the default value it should be initialized with.
    805     static bool dummy_flag = false;
    806     dummy_flag = RegisterRuntimeDebugFlag(&dummy_flag);
    807 
    808     return dummy_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