/* * Copyright (C) 2006 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #define LOG_TAG "JavaBinder" //#define LOG_NDEBUG 0 #include "android_util_Binder.h" #include "JNIHelp.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include //#undef LOGV //#define LOGV(...) fprintf(stderr, __VA_ARGS__) using namespace android; // ---------------------------------------------------------------------------- static struct bindernative_offsets_t { // Class state. jclass mClass; jmethodID mExecTransact; // Object state. jfieldID mObject; } gBinderOffsets; // ---------------------------------------------------------------------------- static struct binderinternal_offsets_t { // Class state. jclass mClass; jmethodID mForceGc; } gBinderInternalOffsets; // ---------------------------------------------------------------------------- static struct debug_offsets_t { // Class state. jclass mClass; } gDebugOffsets; // ---------------------------------------------------------------------------- static struct weakreference_offsets_t { // Class state. jclass mClass; jmethodID mGet; } gWeakReferenceOffsets; static struct error_offsets_t { jclass mClass; } gErrorOffsets; // ---------------------------------------------------------------------------- static struct binderproxy_offsets_t { // Class state. jclass mClass; jmethodID mConstructor; jmethodID mSendDeathNotice; // Object state. jfieldID mObject; jfieldID mSelf; } gBinderProxyOffsets; // ---------------------------------------------------------------------------- static struct parcel_offsets_t { jfieldID mObject; jfieldID mOwnObject; } gParcelOffsets; static struct log_offsets_t { // Class state. jclass mClass; jmethodID mLogE; } gLogOffsets; static struct file_descriptor_offsets_t { jclass mClass; jmethodID mConstructor; jfieldID mDescriptor; } gFileDescriptorOffsets; static struct parcel_file_descriptor_offsets_t { jclass mClass; jmethodID mConstructor; } gParcelFileDescriptorOffsets; static struct strict_mode_callback_offsets_t { jclass mClass; jmethodID mCallback; } gStrictModeCallbackOffsets; // **************************************************************************** // **************************************************************************** // **************************************************************************** static volatile int32_t gNumRefsCreated = 0; static volatile int32_t gNumProxyRefs = 0; static volatile int32_t gNumLocalRefs = 0; static volatile int32_t gNumDeathRefs = 0; static void incRefsCreated(JNIEnv* env) { int old = android_atomic_inc(&gNumRefsCreated); if (old == 200) { android_atomic_and(0, &gNumRefsCreated); env->CallStaticVoidMethod(gBinderInternalOffsets.mClass, gBinderInternalOffsets.mForceGc); } else { LOGV("Now have %d binder ops", old); } } static JavaVM* jnienv_to_javavm(JNIEnv* env) { JavaVM* vm; return env->GetJavaVM(&vm) >= 0 ? vm : NULL; } static JNIEnv* javavm_to_jnienv(JavaVM* vm) { JNIEnv* env; return vm->GetEnv((void **)&env, JNI_VERSION_1_4) >= 0 ? env : NULL; } static void report_exception(JNIEnv* env, jthrowable excep, const char* msg) { env->ExceptionClear(); jstring tagstr = env->NewStringUTF(LOG_TAG); jstring msgstr = env->NewStringUTF(msg); if ((tagstr == NULL) || (msgstr == NULL)) { env->ExceptionClear(); /* assume exception (OOM?) was thrown */ LOGE("Unable to call Log.e()\n"); LOGE("%s", msg); goto bail; } env->CallStaticIntMethod( gLogOffsets.mClass, gLogOffsets.mLogE, tagstr, msgstr, excep); if (env->ExceptionCheck()) { /* attempting to log the failure has failed */ LOGW("Failed trying to log exception, msg='%s'\n", msg); env->ExceptionClear(); } if (env->IsInstanceOf(excep, gErrorOffsets.mClass)) { /* * It's an Error: Reraise the exception, detach this thread, and * wait for the fireworks. Die even more blatantly after a minute * if the gentler attempt doesn't do the trick. * * The GetJavaVM function isn't on the "approved" list of JNI calls * that can be made while an exception is pending, so we want to * get the VM ptr, throw the exception, and then detach the thread. */ JavaVM* vm = jnienv_to_javavm(env); env->Throw(excep); vm->DetachCurrentThread(); sleep(60); LOGE("Forcefully exiting"); exit(1); *((int *) 1) = 1; } bail: /* discard local refs created for us by VM */ env->DeleteLocalRef(tagstr); env->DeleteLocalRef(msgstr); } static void set_dalvik_blockguard_policy(JNIEnv* env, jint strict_policy) { // Call back into android.os.StrictMode#onBinderStrictModePolicyChange // to sync our state back to it. See the comments in StrictMode.java. env->CallStaticVoidMethod(gStrictModeCallbackOffsets.mClass, gStrictModeCallbackOffsets.mCallback, strict_policy); } class JavaBBinderHolder; class JavaBBinder : public BBinder { public: JavaBBinder(JNIEnv* env, jobject object) : mVM(jnienv_to_javavm(env)), mObject(env->NewGlobalRef(object)) { LOGV("Creating JavaBBinder %p\n", this); android_atomic_inc(&gNumLocalRefs); incRefsCreated(env); } bool checkSubclass(const void* subclassID) const { return subclassID == &gBinderOffsets; } jobject object() const { return mObject; } protected: virtual ~JavaBBinder() { LOGV("Destroying JavaBBinder %p\n", this); android_atomic_dec(&gNumLocalRefs); JNIEnv* env = javavm_to_jnienv(mVM); env->DeleteGlobalRef(mObject); } virtual status_t onTransact( uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags = 0) { JNIEnv* env = javavm_to_jnienv(mVM); LOGV("onTransact() on %p calling object %p in env %p vm %p\n", this, mObject, env, mVM); IPCThreadState* thread_state = IPCThreadState::self(); const int strict_policy_before = thread_state->getStrictModePolicy(); thread_state->setLastTransactionBinderFlags(flags); //printf("Transact from %p to Java code sending: ", this); //data.print(); //printf("\n"); jboolean res = env->CallBooleanMethod(mObject, gBinderOffsets.mExecTransact, code, (int32_t)&data, (int32_t)reply, flags); jthrowable excep = env->ExceptionOccurred(); // Restore the Java binder thread's state if it changed while // processing a call (as it would if the Parcel's header had a // new policy mask and Parcel.enforceInterface() changed // it...) const int strict_policy_after = thread_state->getStrictModePolicy(); if (strict_policy_after != strict_policy_before) { // Our thread-local... thread_state->setStrictModePolicy(strict_policy_before); // And the Java-level thread-local... set_dalvik_blockguard_policy(env, strict_policy_before); } if (excep) { report_exception(env, excep, "*** Uncaught remote exception! " "(Exceptions are not yet supported across processes.)"); res = JNI_FALSE; /* clean up JNI local ref -- we don't return to Java code */ env->DeleteLocalRef(excep); } //aout << "onTransact to Java code; result=" << res << endl // << "Transact from " << this << " to Java code returning " // << reply << ": " << *reply << endl; return res != JNI_FALSE ? NO_ERROR : UNKNOWN_TRANSACTION; } virtual status_t dump(int fd, const Vector& args) { return 0; } private: JavaVM* const mVM; jobject const mObject; }; // ---------------------------------------------------------------------------- class JavaBBinderHolder : public RefBase { public: JavaBBinderHolder(JNIEnv* env, jobject object) : mObject(object) { LOGV("Creating JavaBBinderHolder for Object %p\n", object); } ~JavaBBinderHolder() { LOGV("Destroying JavaBBinderHolder for Object %p\n", mObject); } sp get(JNIEnv* env) { AutoMutex _l(mLock); sp b = mBinder.promote(); if (b == NULL) { b = new JavaBBinder(env, mObject); mBinder = b; LOGV("Creating JavaBinder %p (refs %p) for Object %p, weakCount=%d\n", b.get(), b->getWeakRefs(), mObject, b->getWeakRefs()->getWeakCount()); } return b; } sp getExisting() { AutoMutex _l(mLock); return mBinder.promote(); } private: Mutex mLock; jobject mObject; wp mBinder; }; // ---------------------------------------------------------------------------- class JavaDeathRecipient : public IBinder::DeathRecipient { public: JavaDeathRecipient(JNIEnv* env, jobject object) : mVM(jnienv_to_javavm(env)), mObject(env->NewGlobalRef(object)), mHoldsRef(true) { incStrong(this); android_atomic_inc(&gNumDeathRefs); incRefsCreated(env); } void binderDied(const wp& who) { JNIEnv* env = javavm_to_jnienv(mVM); LOGV("Receiving binderDied() on JavaDeathRecipient %p\n", this); env->CallStaticVoidMethod(gBinderProxyOffsets.mClass, gBinderProxyOffsets.mSendDeathNotice, mObject); jthrowable excep = env->ExceptionOccurred(); if (excep) { report_exception(env, excep, "*** Uncaught exception returned from death notification!"); } clearReference(); } void clearReference() { bool release = false; mLock.lock(); if (mHoldsRef) { mHoldsRef = false; release = true; } mLock.unlock(); if (release) { decStrong(this); } } protected: virtual ~JavaDeathRecipient() { //LOGI("Removing death ref: recipient=%p\n", mObject); android_atomic_dec(&gNumDeathRefs); JNIEnv* env = javavm_to_jnienv(mVM); env->DeleteGlobalRef(mObject); } private: JavaVM* const mVM; jobject const mObject; Mutex mLock; bool mHoldsRef; }; // ---------------------------------------------------------------------------- namespace android { static void proxy_cleanup(const void* id, void* obj, void* cleanupCookie) { android_atomic_dec(&gNumProxyRefs); JNIEnv* env = javavm_to_jnienv((JavaVM*)cleanupCookie); env->DeleteGlobalRef((jobject)obj); } static Mutex mProxyLock; jobject javaObjectForIBinder(JNIEnv* env, const sp& val) { if (val == NULL) return NULL; if (val->checkSubclass(&gBinderOffsets)) { // One of our own! jobject object = static_cast(val.get())->object(); //printf("objectForBinder %p: it's our own %p!\n", val.get(), object); return object; } // For the rest of the function we will hold this lock, to serialize // looking/creation of Java proxies for native Binder proxies. AutoMutex _l(mProxyLock); // Someone else's... do we know about it? jobject object = (jobject)val->findObject(&gBinderProxyOffsets); if (object != NULL) { jobject res = env->CallObjectMethod(object, gWeakReferenceOffsets.mGet); if (res != NULL) { LOGV("objectForBinder %p: found existing %p!\n", val.get(), res); return res; } LOGV("Proxy object %p of IBinder %p no longer in working set!!!", object, val.get()); android_atomic_dec(&gNumProxyRefs); val->detachObject(&gBinderProxyOffsets); env->DeleteGlobalRef(object); } object = env->NewObject(gBinderProxyOffsets.mClass, gBinderProxyOffsets.mConstructor); if (object != NULL) { LOGV("objectForBinder %p: created new %p!\n", val.get(), object); // The proxy holds a reference to the native object. env->SetIntField(object, gBinderProxyOffsets.mObject, (int)val.get()); val->incStrong(object); // The native object needs to hold a weak reference back to the // proxy, so we can retrieve the same proxy if it is still active. jobject refObject = env->NewGlobalRef( env->GetObjectField(object, gBinderProxyOffsets.mSelf)); val->attachObject(&gBinderProxyOffsets, refObject, jnienv_to_javavm(env), proxy_cleanup); // Note that a new object reference has been created. android_atomic_inc(&gNumProxyRefs); incRefsCreated(env); } return object; } sp ibinderForJavaObject(JNIEnv* env, jobject obj) { if (obj == NULL) return NULL; if (env->IsInstanceOf(obj, gBinderOffsets.mClass)) { JavaBBinderHolder* jbh = (JavaBBinderHolder*) env->GetIntField(obj, gBinderOffsets.mObject); return jbh != NULL ? jbh->get(env) : NULL; } if (env->IsInstanceOf(obj, gBinderProxyOffsets.mClass)) { return (IBinder*) env->GetIntField(obj, gBinderProxyOffsets.mObject); } LOGW("ibinderForJavaObject: %p is not a Binder object", obj); return NULL; } Parcel* parcelForJavaObject(JNIEnv* env, jobject obj) { if (obj) { Parcel* p = (Parcel*)env->GetIntField(obj, gParcelOffsets.mObject); if (p != NULL) { return p; } jniThrowException(env, "java/lang/IllegalStateException", "Parcel has been finalized!"); } return NULL; } jobject newFileDescriptor(JNIEnv* env, int fd) { jobject object = env->NewObject( gFileDescriptorOffsets.mClass, gFileDescriptorOffsets.mConstructor); if (object != NULL) { //LOGI("Created new FileDescriptor %p with fd %d\n", object, fd); env->SetIntField(object, gFileDescriptorOffsets.mDescriptor, fd); } return object; } jobject newParcelFileDescriptor(JNIEnv* env, jobject fileDesc) { return env->NewObject( gParcelFileDescriptorOffsets.mClass, gParcelFileDescriptorOffsets.mConstructor, fileDesc); } void signalExceptionForError(JNIEnv* env, jobject obj, status_t err) { jclass cls; jmethodID mid; switch (err) { case UNKNOWN_ERROR: jniThrowException(env, "java/lang/RuntimeException", "Unknown error"); break; case NO_MEMORY: jniThrowException(env, "java/lang/OutOfMemoryError", NULL); break; case INVALID_OPERATION: jniThrowException(env, "java/lang/UnsupportedOperationException", NULL); break; case BAD_VALUE: jniThrowException(env, "java/lang/IllegalArgumentException", NULL); break; case BAD_INDEX: jniThrowException(env, "java/lang/IndexOutOfBoundsException", NULL); break; case BAD_TYPE: jniThrowException(env, "java/lang/IllegalArgumentException", NULL); break; case NAME_NOT_FOUND: jniThrowException(env, "java/util/NoSuchElementException", NULL); break; case PERMISSION_DENIED: jniThrowException(env, "java/lang/SecurityException", NULL); break; case NOT_ENOUGH_DATA: jniThrowException(env, "android/os/ParcelFormatException", "Not enough data"); break; case NO_INIT: jniThrowException(env, "java/lang/RuntimeException", "Not initialized"); break; case ALREADY_EXISTS: jniThrowException(env, "java/lang/RuntimeException", "Item already exists"); break; case DEAD_OBJECT: jniThrowException(env, "android/os/DeadObjectException", NULL); break; case UNKNOWN_TRANSACTION: jniThrowException(env, "java/lang/RuntimeException", "Unknown transaction code"); break; case FAILED_TRANSACTION: LOGE("!!! FAILED BINDER TRANSACTION !!!"); //jniThrowException(env, "java/lang/OutOfMemoryError", "Binder transaction too large"); cls = env->GetObjectClass(obj); mid = env->GetMethodID(cls, "callback", "()V"); if (mid != 0) { env->CallVoidMethod(obj, mid); } break; default: LOGE("Unknown binder error code. 0x%x", err); } } } // ---------------------------------------------------------------------------- static jint android_os_Binder_getCallingPid(JNIEnv* env, jobject clazz) { return IPCThreadState::self()->getCallingPid(); } static jint android_os_Binder_getCallingUid(JNIEnv* env, jobject clazz) { return IPCThreadState::self()->getCallingUid(); } static jlong android_os_Binder_clearCallingIdentity(JNIEnv* env, jobject clazz) { return IPCThreadState::self()->clearCallingIdentity(); } static void android_os_Binder_restoreCallingIdentity(JNIEnv* env, jobject clazz, jlong token) { // XXX temporary sanity check to debug crashes. int uid = (int)(token>>32); if (uid > 0 && uid < 999) { // In Android currently there are no uids in this range. char buf[128]; sprintf(buf, "Restoring bad calling ident: 0x%Lx", token); jniThrowException(env, "java/lang/IllegalStateException", buf); return; } IPCThreadState::self()->restoreCallingIdentity(token); } static void android_os_Binder_setThreadStrictModePolicy(JNIEnv* env, jobject clazz, jint policyMask) { IPCThreadState::self()->setStrictModePolicy(policyMask); } static jint android_os_Binder_getThreadStrictModePolicy(JNIEnv* env, jobject clazz) { return IPCThreadState::self()->getStrictModePolicy(); } static void android_os_Binder_flushPendingCommands(JNIEnv* env, jobject clazz) { IPCThreadState::self()->flushCommands(); } static void android_os_Binder_init(JNIEnv* env, jobject clazz) { JavaBBinderHolder* jbh = new JavaBBinderHolder(env, clazz); if (jbh == NULL) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); return; } LOGV("Java Binder %p: acquiring first ref on holder %p", clazz, jbh); jbh->incStrong(clazz); env->SetIntField(clazz, gBinderOffsets.mObject, (int)jbh); } static void android_os_Binder_destroy(JNIEnv* env, jobject clazz) { JavaBBinderHolder* jbh = (JavaBBinderHolder*) env->GetIntField(clazz, gBinderOffsets.mObject); if (jbh != NULL) { env->SetIntField(clazz, gBinderOffsets.mObject, 0); LOGV("Java Binder %p: removing ref on holder %p", clazz, jbh); jbh->decStrong(clazz); } else { // Encountering an uninitialized binder is harmless. All it means is that // the Binder was only partially initialized when its finalizer ran and called // destroy(). The Binder could be partially initialized for several reasons. // For example, a Binder subclass constructor might have thrown an exception before // it could delegate to its superclass's constructor. Consequently init() would // not have been called and the holder pointer would remain NULL. LOGV("Java Binder %p: ignoring uninitialized binder", clazz); } } // ---------------------------------------------------------------------------- static const JNINativeMethod gBinderMethods[] = { /* name, signature, funcPtr */ { "getCallingPid", "()I", (void*)android_os_Binder_getCallingPid }, { "getCallingUid", "()I", (void*)android_os_Binder_getCallingUid }, { "clearCallingIdentity", "()J", (void*)android_os_Binder_clearCallingIdentity }, { "restoreCallingIdentity", "(J)V", (void*)android_os_Binder_restoreCallingIdentity }, { "setThreadStrictModePolicy", "(I)V", (void*)android_os_Binder_setThreadStrictModePolicy }, { "getThreadStrictModePolicy", "()I", (void*)android_os_Binder_getThreadStrictModePolicy }, { "flushPendingCommands", "()V", (void*)android_os_Binder_flushPendingCommands }, { "init", "()V", (void*)android_os_Binder_init }, { "destroy", "()V", (void*)android_os_Binder_destroy } }; const char* const kBinderPathName = "android/os/Binder"; static int int_register_android_os_Binder(JNIEnv* env) { jclass clazz; clazz = env->FindClass(kBinderPathName); LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.Binder"); gBinderOffsets.mClass = (jclass) env->NewGlobalRef(clazz); gBinderOffsets.mExecTransact = env->GetMethodID(clazz, "execTransact", "(IIII)Z"); assert(gBinderOffsets.mExecTransact); gBinderOffsets.mObject = env->GetFieldID(clazz, "mObject", "I"); assert(gBinderOffsets.mObject); return AndroidRuntime::registerNativeMethods( env, kBinderPathName, gBinderMethods, NELEM(gBinderMethods)); } // **************************************************************************** // **************************************************************************** // **************************************************************************** namespace android { jint android_os_Debug_getLocalObjectCount(JNIEnv* env, jobject clazz) { return gNumLocalRefs; } jint android_os_Debug_getProxyObjectCount(JNIEnv* env, jobject clazz) { return gNumProxyRefs; } jint android_os_Debug_getDeathObjectCount(JNIEnv* env, jobject clazz) { return gNumDeathRefs; } } // **************************************************************************** // **************************************************************************** // **************************************************************************** static jobject android_os_BinderInternal_getContextObject(JNIEnv* env, jobject clazz) { sp b = ProcessState::self()->getContextObject(NULL); return javaObjectForIBinder(env, b); } static void android_os_BinderInternal_joinThreadPool(JNIEnv* env, jobject clazz) { sp b = ProcessState::self()->getContextObject(NULL); android::IPCThreadState::self()->joinThreadPool(); } static void android_os_BinderInternal_disableBackgroundScheduling(JNIEnv* env, jobject clazz, jboolean disable) { IPCThreadState::disableBackgroundScheduling(disable ? true : false); } static void android_os_BinderInternal_handleGc(JNIEnv* env, jobject clazz) { LOGV("Gc has executed, clearing binder ops"); android_atomic_and(0, &gNumRefsCreated); } // ---------------------------------------------------------------------------- static const JNINativeMethod gBinderInternalMethods[] = { /* name, signature, funcPtr */ { "getContextObject", "()Landroid/os/IBinder;", (void*)android_os_BinderInternal_getContextObject }, { "joinThreadPool", "()V", (void*)android_os_BinderInternal_joinThreadPool }, { "disableBackgroundScheduling", "(Z)V", (void*)android_os_BinderInternal_disableBackgroundScheduling }, { "handleGc", "()V", (void*)android_os_BinderInternal_handleGc } }; const char* const kBinderInternalPathName = "com/android/internal/os/BinderInternal"; static int int_register_android_os_BinderInternal(JNIEnv* env) { jclass clazz; clazz = env->FindClass(kBinderInternalPathName); LOG_FATAL_IF(clazz == NULL, "Unable to find class com.android.internal.os.BinderInternal"); gBinderInternalOffsets.mClass = (jclass) env->NewGlobalRef(clazz); gBinderInternalOffsets.mForceGc = env->GetStaticMethodID(clazz, "forceBinderGc", "()V"); assert(gBinderInternalOffsets.mForceGc); return AndroidRuntime::registerNativeMethods( env, kBinderInternalPathName, gBinderInternalMethods, NELEM(gBinderInternalMethods)); } // **************************************************************************** // **************************************************************************** // **************************************************************************** static jboolean android_os_BinderProxy_pingBinder(JNIEnv* env, jobject obj) { IBinder* target = (IBinder*) env->GetIntField(obj, gBinderProxyOffsets.mObject); if (target == NULL) { return JNI_FALSE; } status_t err = target->pingBinder(); return err == NO_ERROR ? JNI_TRUE : JNI_FALSE; } static jstring android_os_BinderProxy_getInterfaceDescriptor(JNIEnv* env, jobject obj) { IBinder* target = (IBinder*) env->GetIntField(obj, gBinderProxyOffsets.mObject); if (target != NULL) { const String16& desc = target->getInterfaceDescriptor(); return env->NewString(desc.string(), desc.size()); } jniThrowException(env, "java/lang/RuntimeException", "No binder found for object"); return NULL; } static jboolean android_os_BinderProxy_isBinderAlive(JNIEnv* env, jobject obj) { IBinder* target = (IBinder*) env->GetIntField(obj, gBinderProxyOffsets.mObject); if (target == NULL) { return JNI_FALSE; } bool alive = target->isBinderAlive(); return alive ? JNI_TRUE : JNI_FALSE; } static int getprocname(pid_t pid, char *buf, size_t len) { char filename[20]; FILE *f; sprintf(filename, "/proc/%d/cmdline", pid); f = fopen(filename, "r"); if (!f) { *buf = '\0'; return 1; } if (!fgets(buf, len, f)) { *buf = '\0'; return 2; } fclose(f); return 0; } static bool push_eventlog_string(char** pos, const char* end, const char* str) { jint len = strlen(str); int space_needed = 1 + sizeof(len) + len; if (end - *pos < space_needed) { LOGW("not enough space for string. remain=%d; needed=%d", (end - *pos), space_needed); return false; } **pos = EVENT_TYPE_STRING; (*pos)++; memcpy(*pos, &len, sizeof(len)); *pos += sizeof(len); memcpy(*pos, str, len); *pos += len; return true; } static bool push_eventlog_int(char** pos, const char* end, jint val) { int space_needed = 1 + sizeof(val); if (end - *pos < space_needed) { LOGW("not enough space for int. remain=%d; needed=%d", (end - *pos), space_needed); return false; } **pos = EVENT_TYPE_INT; (*pos)++; memcpy(*pos, &val, sizeof(val)); *pos += sizeof(val); return true; } // From frameworks/base/core/java/android/content/EventLogTags.logtags: #define LOGTAG_BINDER_OPERATION 52004 static void conditionally_log_binder_call(int64_t start_millis, IBinder* target, jint code) { int duration_ms = static_cast(uptimeMillis() - start_millis); int sample_percent; if (duration_ms >= 500) { sample_percent = 100; } else { sample_percent = 100 * duration_ms / 500; if (sample_percent == 0) { return; } if (sample_percent < (random() % 100 + 1)) { return; } } char process_name[40]; getprocname(getpid(), process_name, sizeof(process_name)); String8 desc(target->getInterfaceDescriptor()); char buf[LOGGER_ENTRY_MAX_PAYLOAD]; buf[0] = EVENT_TYPE_LIST; buf[1] = 5; char* pos = &buf[2]; char* end = &buf[LOGGER_ENTRY_MAX_PAYLOAD - 1]; // leave room for final \n if (!push_eventlog_string(&pos, end, desc.string())) return; if (!push_eventlog_int(&pos, end, code)) return; if (!push_eventlog_int(&pos, end, duration_ms)) return; if (!push_eventlog_string(&pos, end, process_name)) return; if (!push_eventlog_int(&pos, end, sample_percent)) return; *(pos++) = '\n'; // conventional with EVENT_TYPE_LIST apparently. android_bWriteLog(LOGTAG_BINDER_OPERATION, buf, pos - buf); } // We only measure binder call durations to potentially log them if // we're on the main thread. Unfortunately sim-eng doesn't seem to // have gettid, so we just ignore this and don't log if we can't // get the thread id. static bool should_time_binder_calls() { #ifdef HAVE_GETTID return (getpid() == androidGetTid()); #else #warning no gettid(), so not logging Binder calls... return false; #endif } static jboolean android_os_BinderProxy_transact(JNIEnv* env, jobject obj, jint code, jobject dataObj, jobject replyObj, jint flags) { if (dataObj == NULL) { jniThrowException(env, "java/lang/NullPointerException", NULL); return JNI_FALSE; } Parcel* data = parcelForJavaObject(env, dataObj); if (data == NULL) { return JNI_FALSE; } Parcel* reply = parcelForJavaObject(env, replyObj); if (reply == NULL && replyObj != NULL) { return JNI_FALSE; } IBinder* target = (IBinder*) env->GetIntField(obj, gBinderProxyOffsets.mObject); if (target == NULL) { jniThrowException(env, "java/lang/IllegalStateException", "Binder has been finalized!"); return JNI_FALSE; } LOGV("Java code calling transact on %p in Java object %p with code %d\n", target, obj, code); // Only log the binder call duration for things on the Java-level main thread. // But if we don't const bool time_binder_calls = should_time_binder_calls(); int64_t start_millis; if (time_binder_calls) { start_millis = uptimeMillis(); } //printf("Transact from Java code to %p sending: ", target); data->print(); status_t err = target->transact(code, *data, reply, flags); //if (reply) printf("Transact from Java code to %p received: ", target); reply->print(); if (time_binder_calls) { conditionally_log_binder_call(start_millis, target, code); } if (err == NO_ERROR) { return JNI_TRUE; } else if (err == UNKNOWN_TRANSACTION) { return JNI_FALSE; } LOGE("Transact on %p in Java object %p with code %d failed\n", target, obj, code); signalExceptionForError(env, obj, err); return JNI_FALSE; } static void android_os_BinderProxy_linkToDeath(JNIEnv* env, jobject obj, jobject recipient, jint flags) { if (recipient == NULL) { jniThrowException(env, "java/lang/NullPointerException", NULL); return; } IBinder* target = (IBinder*) env->GetIntField(obj, gBinderProxyOffsets.mObject); if (target == NULL) { LOGW("Binder has been finalized when calling linkToDeath() with recip=%p)\n", recipient); assert(false); } LOGV("linkToDeath: binder=%p recipient=%p\n", target, recipient); if (!target->localBinder()) { sp jdr = new JavaDeathRecipient(env, recipient); status_t err = target->linkToDeath(jdr, recipient, flags); if (err != NO_ERROR) { // Failure adding the death recipient, so clear its reference // now. jdr->clearReference(); signalExceptionForError(env, obj, err); } } } static jboolean android_os_BinderProxy_unlinkToDeath(JNIEnv* env, jobject obj, jobject recipient, jint flags) { jboolean res = JNI_FALSE; if (recipient == NULL) { jniThrowException(env, "java/lang/NullPointerException", NULL); return res; } IBinder* target = (IBinder*) env->GetIntField(obj, gBinderProxyOffsets.mObject); if (target == NULL) { LOGW("Binder has been finalized when calling linkToDeath() with recip=%p)\n", recipient); return JNI_FALSE; } LOGV("unlinkToDeath: binder=%p recipient=%p\n", target, recipient); if (!target->localBinder()) { wp dr; status_t err = target->unlinkToDeath(NULL, recipient, flags, &dr); if (err == NO_ERROR && dr != NULL) { sp sdr = dr.promote(); JavaDeathRecipient* jdr = static_cast(sdr.get()); if (jdr != NULL) { jdr->clearReference(); } } if (err == NO_ERROR || err == DEAD_OBJECT) { res = JNI_TRUE; } else { jniThrowException(env, "java/util/NoSuchElementException", "Death link does not exist"); } } return res; } static void android_os_BinderProxy_destroy(JNIEnv* env, jobject obj) { IBinder* b = (IBinder*) env->GetIntField(obj, gBinderProxyOffsets.mObject); LOGV("Destroying BinderProxy %p: binder=%p\n", obj, b); env->SetIntField(obj, gBinderProxyOffsets.mObject, 0); b->decStrong(obj); IPCThreadState::self()->flushCommands(); } // ---------------------------------------------------------------------------- static const JNINativeMethod gBinderProxyMethods[] = { /* name, signature, funcPtr */ {"pingBinder", "()Z", (void*)android_os_BinderProxy_pingBinder}, {"isBinderAlive", "()Z", (void*)android_os_BinderProxy_isBinderAlive}, {"getInterfaceDescriptor", "()Ljava/lang/String;", (void*)android_os_BinderProxy_getInterfaceDescriptor}, {"transact", "(ILandroid/os/Parcel;Landroid/os/Parcel;I)Z", (void*)android_os_BinderProxy_transact}, {"linkToDeath", "(Landroid/os/IBinder$DeathRecipient;I)V", (void*)android_os_BinderProxy_linkToDeath}, {"unlinkToDeath", "(Landroid/os/IBinder$DeathRecipient;I)Z", (void*)android_os_BinderProxy_unlinkToDeath}, {"destroy", "()V", (void*)android_os_BinderProxy_destroy}, }; const char* const kBinderProxyPathName = "android/os/BinderProxy"; static int int_register_android_os_BinderProxy(JNIEnv* env) { jclass clazz; clazz = env->FindClass("java/lang/ref/WeakReference"); LOG_FATAL_IF(clazz == NULL, "Unable to find class java.lang.ref.WeakReference"); gWeakReferenceOffsets.mClass = (jclass) env->NewGlobalRef(clazz); gWeakReferenceOffsets.mGet = env->GetMethodID(clazz, "get", "()Ljava/lang/Object;"); assert(gWeakReferenceOffsets.mGet); clazz = env->FindClass("java/lang/Error"); LOG_FATAL_IF(clazz == NULL, "Unable to find class java.lang.Error"); gErrorOffsets.mClass = (jclass) env->NewGlobalRef(clazz); clazz = env->FindClass(kBinderProxyPathName); LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.BinderProxy"); gBinderProxyOffsets.mClass = (jclass) env->NewGlobalRef(clazz); gBinderProxyOffsets.mConstructor = env->GetMethodID(clazz, "", "()V"); assert(gBinderProxyOffsets.mConstructor); gBinderProxyOffsets.mSendDeathNotice = env->GetStaticMethodID(clazz, "sendDeathNotice", "(Landroid/os/IBinder$DeathRecipient;)V"); assert(gBinderProxyOffsets.mSendDeathNotice); gBinderProxyOffsets.mObject = env->GetFieldID(clazz, "mObject", "I"); assert(gBinderProxyOffsets.mObject); gBinderProxyOffsets.mSelf = env->GetFieldID(clazz, "mSelf", "Ljava/lang/ref/WeakReference;"); assert(gBinderProxyOffsets.mSelf); return AndroidRuntime::registerNativeMethods( env, kBinderProxyPathName, gBinderProxyMethods, NELEM(gBinderProxyMethods)); } // **************************************************************************** // **************************************************************************** // **************************************************************************** static jint android_os_Parcel_dataSize(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); return parcel ? parcel->dataSize() : 0; } static jint android_os_Parcel_dataAvail(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); return parcel ? parcel->dataAvail() : 0; } static jint android_os_Parcel_dataPosition(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); return parcel ? parcel->dataPosition() : 0; } static jint android_os_Parcel_dataCapacity(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); return parcel ? parcel->dataCapacity() : 0; } static void android_os_Parcel_setDataSize(JNIEnv* env, jobject clazz, jint size) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { const status_t err = parcel->setDataSize(size); if (err != NO_ERROR) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); } } } static void android_os_Parcel_setDataPosition(JNIEnv* env, jobject clazz, jint pos) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { parcel->setDataPosition(pos); } } static void android_os_Parcel_setDataCapacity(JNIEnv* env, jobject clazz, jint size) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { const status_t err = parcel->setDataCapacity(size); if (err != NO_ERROR) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); } } } static void android_os_Parcel_writeNative(JNIEnv* env, jobject clazz, jobject data, jint offset, jint length) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel == NULL) { return; } void *dest; const status_t err = parcel->writeInt32(length); if (err != NO_ERROR) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); } dest = parcel->writeInplace(length); if (dest == NULL) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); return; } jbyte* ar = (jbyte*)env->GetPrimitiveArrayCritical((jarray)data, 0); if (ar) { memcpy(dest, ar, length); env->ReleasePrimitiveArrayCritical((jarray)data, ar, 0); } } static void android_os_Parcel_writeInt(JNIEnv* env, jobject clazz, jint val) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { const status_t err = parcel->writeInt32(val); if (err != NO_ERROR) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); } } } static void android_os_Parcel_writeLong(JNIEnv* env, jobject clazz, jlong val) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { const status_t err = parcel->writeInt64(val); if (err != NO_ERROR) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); } } } static void android_os_Parcel_writeFloat(JNIEnv* env, jobject clazz, jfloat val) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { const status_t err = parcel->writeFloat(val); if (err != NO_ERROR) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); } } } static void android_os_Parcel_writeDouble(JNIEnv* env, jobject clazz, jdouble val) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { const status_t err = parcel->writeDouble(val); if (err != NO_ERROR) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); } } } static void android_os_Parcel_writeString(JNIEnv* env, jobject clazz, jstring val) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { status_t err = NO_MEMORY; if (val) { const jchar* str = env->GetStringCritical(val, 0); if (str) { err = parcel->writeString16(str, env->GetStringLength(val)); env->ReleaseStringCritical(val, str); } } else { err = parcel->writeString16(NULL, 0); } if (err != NO_ERROR) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); } } } static void android_os_Parcel_writeStrongBinder(JNIEnv* env, jobject clazz, jobject object) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { const status_t err = parcel->writeStrongBinder(ibinderForJavaObject(env, object)); if (err != NO_ERROR) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); } } } static void android_os_Parcel_writeFileDescriptor(JNIEnv* env, jobject clazz, jobject object) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { const status_t err = parcel->writeDupFileDescriptor( env->GetIntField(object, gFileDescriptorOffsets.mDescriptor)); if (err != NO_ERROR) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); } } } static jbyteArray android_os_Parcel_createByteArray(JNIEnv* env, jobject clazz) { jbyteArray ret = NULL; Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { int32_t len = parcel->readInt32(); // sanity check the stored length against the true data size if (len >= 0 && len <= (int32_t)parcel->dataAvail()) { ret = env->NewByteArray(len); if (ret != NULL) { jbyte* a2 = (jbyte*)env->GetPrimitiveArrayCritical(ret, 0); if (a2) { const void* data = parcel->readInplace(len); memcpy(a2, data, len); env->ReleasePrimitiveArrayCritical(ret, a2, 0); } } } } return ret; } static jint android_os_Parcel_readInt(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { return parcel->readInt32(); } return 0; } static jlong android_os_Parcel_readLong(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { return parcel->readInt64(); } return 0; } static jfloat android_os_Parcel_readFloat(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { return parcel->readFloat(); } return 0; } static jdouble android_os_Parcel_readDouble(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { return parcel->readDouble(); } return 0; } static jstring android_os_Parcel_readString(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { size_t len; const char16_t* str = parcel->readString16Inplace(&len); if (str) { return env->NewString(str, len); } return NULL; } return NULL; } static jobject android_os_Parcel_readStrongBinder(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { return javaObjectForIBinder(env, parcel->readStrongBinder()); } return NULL; } static jobject android_os_Parcel_readFileDescriptor(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { int fd = parcel->readFileDescriptor(); if (fd < 0) return NULL; fd = dup(fd); if (fd < 0) return NULL; jobject object = env->NewObject( gFileDescriptorOffsets.mClass, gFileDescriptorOffsets.mConstructor); if (object != NULL) { //LOGI("Created new FileDescriptor %p with fd %d\n", object, fd); env->SetIntField(object, gFileDescriptorOffsets.mDescriptor, fd); } return object; } return NULL; } static jobject android_os_Parcel_openFileDescriptor(JNIEnv* env, jobject clazz, jstring name, jint mode) { if (name == NULL) { jniThrowException(env, "java/lang/NullPointerException", NULL); return NULL; } const jchar* str = env->GetStringCritical(name, 0); if (str == NULL) { // Whatever, whatever. jniThrowException(env, "java/lang/IllegalStateException", NULL); return NULL; } String8 name8(str, env->GetStringLength(name)); env->ReleaseStringCritical(name, str); int flags=0; switch (mode&0x30000000) { case 0: case 0x10000000: flags = O_RDONLY; break; case 0x20000000: flags = O_WRONLY; break; case 0x30000000: flags = O_RDWR; break; } if (mode&0x08000000) flags |= O_CREAT; if (mode&0x04000000) flags |= O_TRUNC; if (mode&0x02000000) flags |= O_APPEND; int realMode = S_IRWXU|S_IRWXG; if (mode&0x00000001) realMode |= S_IROTH; if (mode&0x00000002) realMode |= S_IWOTH; int fd = open(name8.string(), flags, realMode); if (fd < 0) { jniThrowException(env, "java/io/FileNotFoundException", NULL); return NULL; } jobject object = newFileDescriptor(env, fd); if (object == NULL) { close(fd); } return object; } static void android_os_Parcel_closeFileDescriptor(JNIEnv* env, jobject clazz, jobject object) { int fd = env->GetIntField(object, gFileDescriptorOffsets.mDescriptor); if (fd >= 0) { env->SetIntField(object, gFileDescriptorOffsets.mDescriptor, -1); //LOGI("Closing ParcelFileDescriptor %d\n", fd); close(fd); } } static void android_os_Parcel_freeBuffer(JNIEnv* env, jobject clazz) { int32_t own = env->GetIntField(clazz, gParcelOffsets.mOwnObject); if (own) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { //LOGI("Parcel.freeBuffer() called for C++ Parcel %p\n", parcel); parcel->freeData(); } } } static void android_os_Parcel_init(JNIEnv* env, jobject clazz, jint parcelInt) { Parcel* parcel = (Parcel*)parcelInt; int own = 0; if (!parcel) { //LOGI("Initializing obj %p: creating new Parcel\n", clazz); own = 1; parcel = new Parcel; } else { //LOGI("Initializing obj %p: given existing Parcel %p\n", clazz, parcel); } if (parcel == NULL) { jniThrowException(env, "java/lang/OutOfMemoryError", NULL); return; } //LOGI("Initializing obj %p from C++ Parcel %p, own=%d\n", clazz, parcel, own); env->SetIntField(clazz, gParcelOffsets.mOwnObject, own); env->SetIntField(clazz, gParcelOffsets.mObject, (int)parcel); } static void android_os_Parcel_destroy(JNIEnv* env, jobject clazz) { int32_t own = env->GetIntField(clazz, gParcelOffsets.mOwnObject); if (own) { Parcel* parcel = parcelForJavaObject(env, clazz); env->SetIntField(clazz, gParcelOffsets.mObject, 0); env->SetIntField(clazz, gParcelOffsets.mOwnObject, 0); //LOGI("Destroying obj %p: deleting C++ Parcel %p\n", clazz, parcel); delete parcel; } else { env->SetIntField(clazz, gParcelOffsets.mObject, 0); //LOGI("Destroying obj %p: leaving C++ Parcel %p\n", clazz); } } static jbyteArray android_os_Parcel_marshall(JNIEnv* env, jobject clazz) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel == NULL) { return NULL; } // do not marshall if there are binder objects in the parcel if (parcel->objectsCount()) { jniThrowException(env, "java/lang/RuntimeException", "Tried to marshall a Parcel that contained Binder objects."); return NULL; } jbyteArray ret = env->NewByteArray(parcel->dataSize()); if (ret != NULL) { jbyte* array = (jbyte*)env->GetPrimitiveArrayCritical(ret, 0); if (array != NULL) { memcpy(array, parcel->data(), parcel->dataSize()); env->ReleasePrimitiveArrayCritical(ret, array, 0); } } return ret; } static void android_os_Parcel_unmarshall(JNIEnv* env, jobject clazz, jbyteArray data, jint offset, jint length) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel == NULL || length < 0) { return; } jbyte* array = (jbyte*)env->GetPrimitiveArrayCritical(data, 0); if (array) { parcel->setDataSize(length); parcel->setDataPosition(0); void* raw = parcel->writeInplace(length); memcpy(raw, (array + offset), length); env->ReleasePrimitiveArrayCritical(data, array, 0); } } static void android_os_Parcel_appendFrom(JNIEnv* env, jobject clazz, jobject parcel, jint offset, jint length) { Parcel* thisParcel = parcelForJavaObject(env, clazz); if (thisParcel == NULL) { return; } Parcel* otherParcel = parcelForJavaObject(env, parcel); if (otherParcel == NULL) { return; } (void) thisParcel->appendFrom(otherParcel, offset, length); } static jboolean android_os_Parcel_hasFileDescriptors(JNIEnv* env, jobject clazz) { jboolean ret = JNI_FALSE; Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { if (parcel->hasFileDescriptors()) { ret = JNI_TRUE; } } return ret; } static void android_os_Parcel_writeInterfaceToken(JNIEnv* env, jobject clazz, jstring name) { Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { // In the current implementation, the token is just the serialized interface name that // the caller expects to be invoking const jchar* str = env->GetStringCritical(name, 0); if (str != NULL) { parcel->writeInterfaceToken(String16(str, env->GetStringLength(name))); env->ReleaseStringCritical(name, str); } } } static void android_os_Parcel_enforceInterface(JNIEnv* env, jobject clazz, jstring name) { jboolean ret = JNI_FALSE; Parcel* parcel = parcelForJavaObject(env, clazz); if (parcel != NULL) { const jchar* str = env->GetStringCritical(name, 0); if (str) { IPCThreadState* threadState = IPCThreadState::self(); const int32_t oldPolicy = threadState->getStrictModePolicy(); const bool isValid = parcel->enforceInterface( String16(str, env->GetStringLength(name)), threadState); env->ReleaseStringCritical(name, str); if (isValid) { const int32_t newPolicy = threadState->getStrictModePolicy(); if (oldPolicy != newPolicy) { // Need to keep the Java-level thread-local strict // mode policy in sync for the libcore // enforcements, which involves an upcall back // into Java. (We can't modify the // Parcel.enforceInterface signature, as it's // pseudo-public, and used via AIDL // auto-generation...) set_dalvik_blockguard_policy(env, newPolicy); } return; // everything was correct -> return silently } } } // all error conditions wind up here jniThrowException(env, "java/lang/SecurityException", "Binder invocation to an incorrect interface"); } // ---------------------------------------------------------------------------- static const JNINativeMethod gParcelMethods[] = { {"dataSize", "()I", (void*)android_os_Parcel_dataSize}, {"dataAvail", "()I", (void*)android_os_Parcel_dataAvail}, {"dataPosition", "()I", (void*)android_os_Parcel_dataPosition}, {"dataCapacity", "()I", (void*)android_os_Parcel_dataCapacity}, {"setDataSize", "(I)V", (void*)android_os_Parcel_setDataSize}, {"setDataPosition", "(I)V", (void*)android_os_Parcel_setDataPosition}, {"setDataCapacity", "(I)V", (void*)android_os_Parcel_setDataCapacity}, {"writeNative", "([BII)V", (void*)android_os_Parcel_writeNative}, {"writeInt", "(I)V", (void*)android_os_Parcel_writeInt}, {"writeLong", "(J)V", (void*)android_os_Parcel_writeLong}, {"writeFloat", "(F)V", (void*)android_os_Parcel_writeFloat}, {"writeDouble", "(D)V", (void*)android_os_Parcel_writeDouble}, {"writeString", "(Ljava/lang/String;)V", (void*)android_os_Parcel_writeString}, {"writeStrongBinder", "(Landroid/os/IBinder;)V", (void*)android_os_Parcel_writeStrongBinder}, {"writeFileDescriptor", "(Ljava/io/FileDescriptor;)V", (void*)android_os_Parcel_writeFileDescriptor}, {"createByteArray", "()[B", (void*)android_os_Parcel_createByteArray}, {"readInt", "()I", (void*)android_os_Parcel_readInt}, {"readLong", "()J", (void*)android_os_Parcel_readLong}, {"readFloat", "()F", (void*)android_os_Parcel_readFloat}, {"readDouble", "()D", (void*)android_os_Parcel_readDouble}, {"readString", "()Ljava/lang/String;", (void*)android_os_Parcel_readString}, {"readStrongBinder", "()Landroid/os/IBinder;", (void*)android_os_Parcel_readStrongBinder}, {"internalReadFileDescriptor", "()Ljava/io/FileDescriptor;", (void*)android_os_Parcel_readFileDescriptor}, {"openFileDescriptor", "(Ljava/lang/String;I)Ljava/io/FileDescriptor;", (void*)android_os_Parcel_openFileDescriptor}, {"closeFileDescriptor", "(Ljava/io/FileDescriptor;)V", (void*)android_os_Parcel_closeFileDescriptor}, {"freeBuffer", "()V", (void*)android_os_Parcel_freeBuffer}, {"init", "(I)V", (void*)android_os_Parcel_init}, {"destroy", "()V", (void*)android_os_Parcel_destroy}, {"marshall", "()[B", (void*)android_os_Parcel_marshall}, {"unmarshall", "([BII)V", (void*)android_os_Parcel_unmarshall}, {"appendFrom", "(Landroid/os/Parcel;II)V", (void*)android_os_Parcel_appendFrom}, {"hasFileDescriptors", "()Z", (void*)android_os_Parcel_hasFileDescriptors}, {"writeInterfaceToken", "(Ljava/lang/String;)V", (void*)android_os_Parcel_writeInterfaceToken}, {"enforceInterface", "(Ljava/lang/String;)V", (void*)android_os_Parcel_enforceInterface}, }; const char* const kParcelPathName = "android/os/Parcel"; static int int_register_android_os_Parcel(JNIEnv* env) { jclass clazz; clazz = env->FindClass("android/util/Log"); LOG_FATAL_IF(clazz == NULL, "Unable to find class android.util.Log"); gLogOffsets.mClass = (jclass) env->NewGlobalRef(clazz); gLogOffsets.mLogE = env->GetStaticMethodID( clazz, "e", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/Throwable;)I"); assert(gLogOffsets.mLogE); clazz = env->FindClass("java/io/FileDescriptor"); LOG_FATAL_IF(clazz == NULL, "Unable to find class java.io.FileDescriptor"); gFileDescriptorOffsets.mClass = (jclass) env->NewGlobalRef(clazz); gFileDescriptorOffsets.mConstructor = env->GetMethodID(clazz, "", "()V"); gFileDescriptorOffsets.mDescriptor = env->GetFieldID(clazz, "descriptor", "I"); LOG_FATAL_IF(gFileDescriptorOffsets.mDescriptor == NULL, "Unable to find descriptor field in java.io.FileDescriptor"); clazz = env->FindClass("android/os/ParcelFileDescriptor"); LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.ParcelFileDescriptor"); gParcelFileDescriptorOffsets.mClass = (jclass) env->NewGlobalRef(clazz); gParcelFileDescriptorOffsets.mConstructor = env->GetMethodID(clazz, "", "(Ljava/io/FileDescriptor;)V"); clazz = env->FindClass(kParcelPathName); LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.Parcel"); gParcelOffsets.mObject = env->GetFieldID(clazz, "mObject", "I"); gParcelOffsets.mOwnObject = env->GetFieldID(clazz, "mOwnObject", "I"); clazz = env->FindClass("android/os/StrictMode"); LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.StrictMode"); gStrictModeCallbackOffsets.mClass = (jclass) env->NewGlobalRef(clazz); gStrictModeCallbackOffsets.mCallback = env->GetStaticMethodID( clazz, "onBinderStrictModePolicyChange", "(I)V"); LOG_FATAL_IF(gStrictModeCallbackOffsets.mCallback == NULL, "Unable to find strict mode callback."); return AndroidRuntime::registerNativeMethods( env, kParcelPathName, gParcelMethods, NELEM(gParcelMethods)); } int register_android_os_Binder(JNIEnv* env) { if (int_register_android_os_Binder(env) < 0) return -1; if (int_register_android_os_BinderInternal(env) < 0) return -1; if (int_register_android_os_BinderProxy(env) < 0) return -1; if (int_register_android_os_Parcel(env) < 0) return -1; return 0; } namespace android { // Returns the Unix file descriptor for a ParcelFileDescriptor object int getParcelFileDescriptorFD(JNIEnv* env, jobject object) { return env->GetIntField(object, gFileDescriptorOffsets.mDescriptor); } }