Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 | //#define LOG_NDEBUG 0 |
| 18 | #define LOG_TAG "JHwRemoteBinder" |
| 19 | #include <android-base/logging.h> |
| 20 | |
| 21 | #include "android_os_HwRemoteBinder.h" |
| 22 | |
| 23 | #include "android_os_HwParcel.h" |
| 24 | |
Yifan Hong | 73b6c27 | 2017-10-31 17:32:15 -0700 | [diff] [blame] | 25 | #include <android/hidl/base/1.0/IBase.h> |
| 26 | #include <android/hidl/base/1.0/BpHwBase.h> |
| 27 | #include <android/hidl/base/1.0/BnHwBase.h> |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 28 | #include <android_runtime/AndroidRuntime.h> |
Martijn Coenen | aa2c32f | 2016-09-01 01:37:05 +0200 | [diff] [blame] | 29 | #include <hidl/Status.h> |
Yifan Hong | 73b6c27 | 2017-10-31 17:32:15 -0700 | [diff] [blame] | 30 | #include <hidl/HidlTransportSupport.h> |
| 31 | #include <nativehelper/JNIHelp.h> |
Steven Moreland | 2279b25 | 2017-07-19 09:50:45 -0700 | [diff] [blame] | 32 | #include <nativehelper/ScopedUtfChars.h> |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 33 | #include <nativehelper/ScopedLocalRef.h> |
| 34 | |
| 35 | #include "core_jni_helpers.h" |
| 36 | |
| 37 | using android::AndroidRuntime; |
| 38 | |
| 39 | #define PACKAGE_PATH "android/os" |
| 40 | #define CLASS_NAME "HwRemoteBinder" |
| 41 | #define CLASS_PATH PACKAGE_PATH "/" CLASS_NAME |
| 42 | |
| 43 | namespace android { |
| 44 | |
| 45 | static struct fields_t { |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 46 | jclass proxy_class; |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 47 | jfieldID contextID; |
| 48 | jmethodID constructID; |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 49 | jmethodID sendDeathNotice; |
| 50 | } gProxyOffsets; |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 51 | |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 52 | static struct class_offsets_t |
| 53 | { |
| 54 | jmethodID mGetName; |
| 55 | } gClassOffsets; |
| 56 | |
| 57 | static JavaVM* jnienv_to_javavm(JNIEnv* env) |
| 58 | { |
| 59 | JavaVM* vm; |
| 60 | return env->GetJavaVM(&vm) >= 0 ? vm : NULL; |
| 61 | } |
| 62 | |
| 63 | static JNIEnv* javavm_to_jnienv(JavaVM* vm) |
| 64 | { |
| 65 | JNIEnv* env; |
| 66 | return vm->GetEnv((void **)&env, JNI_VERSION_1_4) >= 0 ? env : NULL; |
| 67 | } |
| 68 | |
| 69 | // ---------------------------------------------------------------------------- |
| 70 | class HwBinderDeathRecipient : public hardware::IBinder::DeathRecipient |
| 71 | { |
| 72 | public: |
| 73 | HwBinderDeathRecipient(JNIEnv* env, jobject object, jlong cookie, const sp<HwBinderDeathRecipientList>& list) |
| 74 | : mVM(jnienv_to_javavm(env)), mObject(env->NewGlobalRef(object)), |
| 75 | mObjectWeak(NULL), mCookie(cookie), mList(list) |
| 76 | { |
| 77 | // These objects manage their own lifetimes so are responsible for final bookkeeping. |
| 78 | // The list holds a strong reference to this object. |
| 79 | list->add(this); |
| 80 | } |
| 81 | |
| 82 | void binderDied(const wp<hardware::IBinder>& who) |
| 83 | { |
| 84 | if (mObject != NULL) { |
| 85 | JNIEnv* env = javavm_to_jnienv(mVM); |
| 86 | |
| 87 | env->CallStaticVoidMethod(gProxyOffsets.proxy_class, gProxyOffsets.sendDeathNotice, mObject, mCookie); |
| 88 | if (env->ExceptionCheck()) { |
| 89 | ALOGE("Uncaught exception returned from death notification."); |
| 90 | env->ExceptionClear(); |
| 91 | } |
| 92 | |
| 93 | // Serialize with our containing HwBinderDeathRecipientList so that we can't |
| 94 | // delete the global ref on mObject while the list is being iterated. |
| 95 | sp<HwBinderDeathRecipientList> list = mList.promote(); |
| 96 | if (list != NULL) { |
| 97 | AutoMutex _l(list->lock()); |
| 98 | |
| 99 | // Demote from strong ref to weak after binderDied() has been delivered, |
| 100 | // to allow the DeathRecipient and BinderProxy to be GC'd if no longer needed. |
| 101 | mObjectWeak = env->NewWeakGlobalRef(mObject); |
| 102 | env->DeleteGlobalRef(mObject); |
| 103 | mObject = NULL; |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | void clearReference() |
| 109 | { |
| 110 | sp<HwBinderDeathRecipientList> list = mList.promote(); |
| 111 | if (list != NULL) { |
| 112 | list->remove(this); |
| 113 | } else { |
| 114 | ALOGE("clearReference() on JDR %p but DRL wp purged", this); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | bool matches(jobject obj) { |
| 119 | bool result; |
| 120 | JNIEnv* env = javavm_to_jnienv(mVM); |
| 121 | |
| 122 | if (mObject != NULL) { |
| 123 | result = env->IsSameObject(obj, mObject); |
| 124 | } else { |
| 125 | jobject me = env->NewLocalRef(mObjectWeak); |
| 126 | result = env->IsSameObject(obj, me); |
| 127 | env->DeleteLocalRef(me); |
| 128 | } |
| 129 | return result; |
| 130 | } |
| 131 | |
| 132 | void warnIfStillLive() { |
| 133 | if (mObject != NULL) { |
| 134 | // Okay, something is wrong -- we have a hard reference to a live death |
| 135 | // recipient on the VM side, but the list is being torn down. |
| 136 | JNIEnv* env = javavm_to_jnienv(mVM); |
| 137 | ScopedLocalRef<jclass> objClassRef(env, env->GetObjectClass(mObject)); |
| 138 | ScopedLocalRef<jstring> nameRef(env, |
| 139 | (jstring) env->CallObjectMethod(objClassRef.get(), gClassOffsets.mGetName)); |
| 140 | ScopedUtfChars nameUtf(env, nameRef.get()); |
| 141 | if (nameUtf.c_str() != NULL) { |
| 142 | ALOGW("BinderProxy is being destroyed but the application did not call " |
| 143 | "unlinkToDeath to unlink all of its death recipients beforehand. " |
| 144 | "Releasing leaked death recipient: %s", nameUtf.c_str()); |
| 145 | } else { |
| 146 | ALOGW("BinderProxy being destroyed; unable to get DR object name"); |
| 147 | env->ExceptionClear(); |
| 148 | } |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | protected: |
| 153 | virtual ~HwBinderDeathRecipient() |
| 154 | { |
| 155 | JNIEnv* env = javavm_to_jnienv(mVM); |
| 156 | if (mObject != NULL) { |
| 157 | env->DeleteGlobalRef(mObject); |
| 158 | } else { |
| 159 | env->DeleteWeakGlobalRef(mObjectWeak); |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | private: |
| 164 | JavaVM* const mVM; |
| 165 | jobject mObject; |
| 166 | jweak mObjectWeak; // will be a weak ref to the same VM-side DeathRecipient after binderDied() |
| 167 | jlong mCookie; |
| 168 | wp<HwBinderDeathRecipientList> mList; |
| 169 | }; |
| 170 | // ---------------------------------------------------------------------------- |
| 171 | |
| 172 | HwBinderDeathRecipientList::HwBinderDeathRecipientList() { |
| 173 | } |
| 174 | |
| 175 | HwBinderDeathRecipientList::~HwBinderDeathRecipientList() { |
| 176 | AutoMutex _l(mLock); |
| 177 | |
| 178 | for (const sp<HwBinderDeathRecipient>& deathRecipient : mList) { |
| 179 | deathRecipient->warnIfStillLive(); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | void HwBinderDeathRecipientList::add(const sp<HwBinderDeathRecipient>& recipient) { |
| 184 | AutoMutex _l(mLock); |
| 185 | |
| 186 | mList.push_back(recipient); |
| 187 | } |
| 188 | |
| 189 | void HwBinderDeathRecipientList::remove(const sp<HwBinderDeathRecipient>& recipient) { |
| 190 | AutoMutex _l(mLock); |
| 191 | |
| 192 | List< sp<HwBinderDeathRecipient> >::iterator iter; |
| 193 | for (iter = mList.begin(); iter != mList.end(); iter++) { |
| 194 | if (*iter == recipient) { |
| 195 | mList.erase(iter); |
| 196 | return; |
| 197 | } |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | sp<HwBinderDeathRecipient> HwBinderDeathRecipientList::find(jobject recipient) { |
| 202 | AutoMutex _l(mLock); |
| 203 | |
| 204 | for (const sp<HwBinderDeathRecipient>& deathRecipient : mList) { |
| 205 | if (deathRecipient->matches(recipient)) { |
| 206 | return deathRecipient; |
| 207 | } |
| 208 | } |
| 209 | return NULL; |
| 210 | } |
| 211 | |
| 212 | Mutex& HwBinderDeathRecipientList::lock() { |
| 213 | return mLock; |
| 214 | } |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 215 | |
| 216 | // static |
| 217 | void JHwRemoteBinder::InitClass(JNIEnv *env) { |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 218 | jclass clazz = FindClassOrDie(env, CLASS_PATH); |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 219 | |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 220 | gProxyOffsets.proxy_class = MakeGlobalRefOrDie(env, clazz); |
| 221 | gProxyOffsets.contextID = |
| 222 | GetFieldIDOrDie(env, clazz, "mNativeContext", "J"); |
| 223 | gProxyOffsets.constructID = GetMethodIDOrDie(env, clazz, "<init>", "()V"); |
| 224 | gProxyOffsets.sendDeathNotice = GetStaticMethodIDOrDie(env, clazz, "sendDeathNotice", |
| 225 | "(Landroid/os/IHwBinder$DeathRecipient;J)V"); |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 226 | |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 227 | clazz = FindClassOrDie(env, "java/lang/Class"); |
| 228 | gClassOffsets.mGetName = GetMethodIDOrDie(env, clazz, "getName", "()Ljava/lang/String;"); |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | // static |
| 232 | sp<JHwRemoteBinder> JHwRemoteBinder::SetNativeContext( |
| 233 | JNIEnv *env, jobject thiz, const sp<JHwRemoteBinder> &context) { |
| 234 | sp<JHwRemoteBinder> old = |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 235 | (JHwRemoteBinder *)env->GetLongField(thiz, gProxyOffsets.contextID); |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 236 | |
| 237 | if (context != NULL) { |
| 238 | context->incStrong(NULL /* id */); |
| 239 | } |
| 240 | |
| 241 | if (old != NULL) { |
| 242 | old->decStrong(NULL /* id */); |
| 243 | } |
| 244 | |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 245 | env->SetLongField(thiz, gProxyOffsets.contextID, (long)context.get()); |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 246 | |
| 247 | return old; |
| 248 | } |
| 249 | |
| 250 | // static |
| 251 | sp<JHwRemoteBinder> JHwRemoteBinder::GetNativeContext( |
| 252 | JNIEnv *env, jobject thiz) { |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 253 | return (JHwRemoteBinder *)env->GetLongField(thiz, gProxyOffsets.contextID); |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | // static |
| 257 | jobject JHwRemoteBinder::NewObject( |
| 258 | JNIEnv *env, const sp<hardware::IBinder> &binder) { |
| 259 | ScopedLocalRef<jclass> clazz(env, FindClassOrDie(env, CLASS_PATH)); |
| 260 | |
| 261 | // XXX Have to look up the constructor here because otherwise that static |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 262 | // class initializer isn't called and gProxyOffsets.constructID is undefined :( |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 263 | |
| 264 | jmethodID constructID = GetMethodIDOrDie(env, clazz.get(), "<init>", "()V"); |
| 265 | |
| 266 | jobject obj = env->NewObject(clazz.get(), constructID); |
| 267 | JHwRemoteBinder::GetNativeContext(env, obj)->setBinder(binder); |
| 268 | |
| 269 | return obj; |
| 270 | } |
| 271 | |
| 272 | JHwRemoteBinder::JHwRemoteBinder( |
| 273 | JNIEnv *env, jobject thiz, const sp<hardware::IBinder> &binder) |
| 274 | : mBinder(binder) { |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 275 | mDeathRecipientList = new HwBinderDeathRecipientList(); |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 276 | jclass clazz = env->GetObjectClass(thiz); |
| 277 | CHECK(clazz != NULL); |
| 278 | |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 279 | mObject = env->NewWeakGlobalRef(thiz); |
| 280 | } |
| 281 | |
| 282 | JHwRemoteBinder::~JHwRemoteBinder() { |
| 283 | JNIEnv *env = AndroidRuntime::getJNIEnv(); |
| 284 | |
| 285 | env->DeleteWeakGlobalRef(mObject); |
| 286 | mObject = NULL; |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 287 | } |
| 288 | |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 289 | sp<hardware::IBinder> JHwRemoteBinder::getBinder() const { |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 290 | return mBinder; |
| 291 | } |
| 292 | |
| 293 | void JHwRemoteBinder::setBinder(const sp<hardware::IBinder> &binder) { |
| 294 | mBinder = binder; |
| 295 | } |
| 296 | |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 297 | sp<HwBinderDeathRecipientList> JHwRemoteBinder::getDeathRecipientList() const { |
| 298 | return mDeathRecipientList; |
| 299 | } |
| 300 | |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 301 | } // namespace android |
| 302 | |
| 303 | //////////////////////////////////////////////////////////////////////////////// |
| 304 | |
| 305 | using namespace android; |
| 306 | |
| 307 | static void releaseNativeContext(void *nativeContext) { |
| 308 | sp<JHwRemoteBinder> binder = (JHwRemoteBinder *)nativeContext; |
| 309 | |
| 310 | if (binder != NULL) { |
| 311 | binder->decStrong(NULL /* id */); |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | static jlong JHwRemoteBinder_native_init(JNIEnv *env) { |
| 316 | JHwRemoteBinder::InitClass(env); |
| 317 | |
| 318 | return reinterpret_cast<jlong>(&releaseNativeContext); |
| 319 | } |
| 320 | |
| 321 | static void JHwRemoteBinder_native_setup_empty(JNIEnv *env, jobject thiz) { |
| 322 | sp<JHwRemoteBinder> context = |
| 323 | new JHwRemoteBinder(env, thiz, NULL /* service */); |
| 324 | |
| 325 | JHwRemoteBinder::SetNativeContext(env, thiz, context); |
| 326 | } |
| 327 | |
| 328 | static void JHwRemoteBinder_native_transact( |
| 329 | JNIEnv *env, |
| 330 | jobject thiz, |
| 331 | jint code, |
| 332 | jobject requestObj, |
| 333 | jobject replyObj, |
| 334 | jint flags) { |
| 335 | sp<hardware::IBinder> binder = |
| 336 | JHwRemoteBinder::GetNativeContext(env, thiz)->getBinder(); |
| 337 | |
| 338 | if (requestObj == NULL) { |
| 339 | jniThrowException(env, "java/lang/NullPointerException", NULL); |
| 340 | return; |
| 341 | } |
| 342 | |
| 343 | const hardware::Parcel *request = |
| 344 | JHwParcel::GetNativeContext(env, requestObj)->getParcel(); |
| 345 | |
| 346 | hardware::Parcel *reply = |
| 347 | JHwParcel::GetNativeContext(env, replyObj)->getParcel(); |
| 348 | |
| 349 | status_t err = binder->transact(code, *request, reply, flags); |
Steven Moreland | e62b1f3 | 2016-12-20 15:55:48 -0800 | [diff] [blame] | 350 | signalExceptionForError(env, err, true /* canThrowRemoteException */); |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 351 | } |
| 352 | |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 353 | static jboolean JHwRemoteBinder_linkToDeath(JNIEnv* env, jobject thiz, |
| 354 | jobject recipient, jlong cookie) |
| 355 | { |
| 356 | if (recipient == NULL) { |
| 357 | jniThrowNullPointerException(env, NULL); |
| 358 | return JNI_FALSE; |
| 359 | } |
| 360 | |
| 361 | sp<JHwRemoteBinder> context = JHwRemoteBinder::GetNativeContext(env, thiz); |
| 362 | sp<hardware::IBinder> binder = context->getBinder(); |
| 363 | |
| 364 | if (!binder->localBinder()) { |
| 365 | HwBinderDeathRecipientList* list = (context->getDeathRecipientList()).get(); |
| 366 | sp<HwBinderDeathRecipient> jdr = new HwBinderDeathRecipient(env, recipient, cookie, list); |
| 367 | status_t err = binder->linkToDeath(jdr, NULL, 0); |
| 368 | if (err != NO_ERROR) { |
| 369 | // Failure adding the death recipient, so clear its reference |
| 370 | // now. |
| 371 | jdr->clearReference(); |
| 372 | return JNI_FALSE; |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | return JNI_TRUE; |
| 377 | } |
| 378 | |
| 379 | static jboolean JHwRemoteBinder_unlinkToDeath(JNIEnv* env, jobject thiz, |
| 380 | jobject recipient) |
| 381 | { |
| 382 | jboolean res = JNI_FALSE; |
| 383 | if (recipient == NULL) { |
| 384 | jniThrowNullPointerException(env, NULL); |
| 385 | return res; |
| 386 | } |
| 387 | |
| 388 | sp<JHwRemoteBinder> context = JHwRemoteBinder::GetNativeContext(env, thiz); |
| 389 | sp<hardware::IBinder> binder = context->getBinder(); |
| 390 | |
| 391 | if (!binder->localBinder()) { |
| 392 | status_t err = NAME_NOT_FOUND; |
| 393 | |
| 394 | // If we find the matching recipient, proceed to unlink using that |
| 395 | HwBinderDeathRecipientList* list = (context->getDeathRecipientList()).get(); |
| 396 | sp<HwBinderDeathRecipient> origJDR = list->find(recipient); |
| 397 | if (origJDR != NULL) { |
| 398 | wp<hardware::IBinder::DeathRecipient> dr; |
| 399 | err = binder->unlinkToDeath(origJDR, NULL, 0, &dr); |
| 400 | if (err == NO_ERROR && dr != NULL) { |
| 401 | sp<hardware::IBinder::DeathRecipient> sdr = dr.promote(); |
| 402 | HwBinderDeathRecipient* jdr = static_cast<HwBinderDeathRecipient*>(sdr.get()); |
| 403 | if (jdr != NULL) { |
| 404 | jdr->clearReference(); |
| 405 | } |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | if (err == NO_ERROR || err == DEAD_OBJECT) { |
| 410 | res = JNI_TRUE; |
| 411 | } else { |
| 412 | jniThrowException(env, "java/util/NoSuchElementException", |
| 413 | "Death link does not exist"); |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | return res; |
| 418 | } |
| 419 | |
Yifan Hong | 73b6c27 | 2017-10-31 17:32:15 -0700 | [diff] [blame] | 420 | static sp<hidl::base::V1_0::IBase> toIBase(JNIEnv* env, jclass hwRemoteBinderClazz, jobject jbinder) |
| 421 | { |
| 422 | if (jbinder == nullptr) { |
| 423 | return nullptr; |
| 424 | } |
| 425 | if (!env->IsInstanceOf(jbinder, hwRemoteBinderClazz)) { |
| 426 | return nullptr; |
| 427 | } |
| 428 | sp<JHwRemoteBinder> context = JHwRemoteBinder::GetNativeContext(env, jbinder); |
| 429 | sp<hardware::IBinder> cbinder = context->getBinder(); |
| 430 | return hardware::fromBinder<hidl::base::V1_0::IBase, hidl::base::V1_0::BpHwBase, |
| 431 | hidl::base::V1_0::BnHwBase>(cbinder); |
| 432 | } |
| 433 | |
| 434 | // equals iff other is also a non-null android.os.HwRemoteBinder object |
| 435 | // and getBinder() returns the same object. |
| 436 | // In particular, if other is an android.os.HwBinder object (for stubs) then |
| 437 | // it returns false. |
| 438 | static jboolean JHwRemoteBinder_equals(JNIEnv* env, jobject thiz, jobject other) |
| 439 | { |
| 440 | if (env->IsSameObject(thiz, other)) { |
| 441 | return true; |
| 442 | } |
| 443 | if (other == NULL) { |
| 444 | return false; |
| 445 | } |
| 446 | |
| 447 | ScopedLocalRef<jclass> clazz(env, FindClassOrDie(env, CLASS_PATH)); |
| 448 | |
| 449 | return hardware::interfacesEqual(toIBase(env, clazz.get(), thiz), toIBase(env, clazz.get(), other)); |
| 450 | } |
| 451 | |
| 452 | static jint JHwRemoteBinder_hashCode(JNIEnv* env, jobject thiz) { |
| 453 | jlong longHash = reinterpret_cast<jlong>( |
| 454 | JHwRemoteBinder::GetNativeContext(env, thiz)->getBinder().get()); |
| 455 | return static_cast<jint>(longHash ^ (longHash >> 32)); // See Long.hashCode() |
| 456 | } |
| 457 | |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 458 | static JNINativeMethod gMethods[] = { |
| 459 | { "native_init", "()J", (void *)JHwRemoteBinder_native_init }, |
| 460 | |
| 461 | { "native_setup_empty", "()V", |
| 462 | (void *)JHwRemoteBinder_native_setup_empty }, |
| 463 | |
| 464 | { "transact", |
| 465 | "(IL" PACKAGE_PATH "/HwParcel;L" PACKAGE_PATH "/HwParcel;I)V", |
| 466 | (void *)JHwRemoteBinder_native_transact }, |
Martijn Coenen | 727f7bf | 2016-12-27 14:33:09 +0100 | [diff] [blame] | 467 | |
| 468 | {"linkToDeath", |
| 469 | "(Landroid/os/IHwBinder$DeathRecipient;J)Z", |
| 470 | (void*)JHwRemoteBinder_linkToDeath}, |
| 471 | |
| 472 | {"unlinkToDeath", |
| 473 | "(Landroid/os/IHwBinder$DeathRecipient;)Z", |
| 474 | (void*)JHwRemoteBinder_unlinkToDeath}, |
Yifan Hong | 73b6c27 | 2017-10-31 17:32:15 -0700 | [diff] [blame] | 475 | |
| 476 | {"equals", "(Ljava/lang/Object;)Z", |
| 477 | (void*)JHwRemoteBinder_equals}, |
| 478 | |
| 479 | {"hashCode", "()I", (void*)JHwRemoteBinder_hashCode}, |
Andreas Huber | dab5fc6 | 2016-08-15 09:25:02 -0700 | [diff] [blame] | 480 | }; |
| 481 | |
| 482 | namespace android { |
| 483 | |
| 484 | int register_android_os_HwRemoteBinder(JNIEnv *env) { |
| 485 | return RegisterMethodsOrDie(env, CLASS_PATH, gMethods, NELEM(gMethods)); |
| 486 | } |
| 487 | |
| 488 | } // namespace android |
| 489 | |