diff --git a/libs/binder/ndk/ibinder.cpp b/libs/binder/ndk/ibinder.cpp
index 4610ba9..2a2eed7 100644
--- a/libs/binder/ndk/ibinder.cpp
+++ b/libs/binder/ndk/ibinder.cpp
@@ -181,7 +181,7 @@
 
         binder_status_t status = getClass()->onTransact(this, code, &in, &out);
         return PruneStatusT(status);
-    } else if (code == SHELL_COMMAND_TRANSACTION && getClass()->handleShellCommand != nullptr) {
+    } else if (code == SHELL_COMMAND_TRANSACTION) {
         int in = data.readFileDescriptor();
         int out = data.readFileDescriptor();
         int err = data.readFileDescriptor();
diff --git a/libs/binder/ndk/ibinder_internal.h b/libs/binder/ndk/ibinder_internal.h
index 0fa47c6..f601127 100644
--- a/libs/binder/ndk/ibinder_internal.h
+++ b/libs/binder/ndk/ibinder_internal.h
@@ -115,13 +115,13 @@
     const ::android::String16& getInterfaceDescriptor() const { return mInterfaceDescriptor; }
 
     // required to be non-null, implemented for every class
-    const AIBinder_Class_onCreate onCreate = nullptr;
-    const AIBinder_Class_onDestroy onDestroy = nullptr;
-    const AIBinder_Class_onTransact onTransact = nullptr;
+    const AIBinder_Class_onCreate onCreate;
+    const AIBinder_Class_onDestroy onDestroy;
+    const AIBinder_Class_onTransact onTransact;
 
     // optional methods for a class
-    AIBinder_onDump onDump = nullptr;
-    AIBinder_handleShellCommand handleShellCommand = nullptr;
+    AIBinder_onDump onDump;
+    AIBinder_handleShellCommand handleShellCommand;
 
    private:
     // This must be a String16 since BBinder virtual getInterfaceDescriptor returns a reference to
diff --git a/libs/binder/ndk/tests/iface.cpp b/libs/binder/ndk/tests/iface.cpp
index a588985..64832f3 100644
--- a/libs/binder/ndk/tests/iface.cpp
+++ b/libs/binder/ndk/tests/iface.cpp
@@ -118,7 +118,7 @@
     AIBinder_Weak_delete(mWeakBinder);
 }
 
-AIBinder* IFoo::getBinder() {
+binder_status_t IFoo::addService(const char* instance) {
     AIBinder* binder = nullptr;
 
     if (mWeakBinder != nullptr) {
@@ -132,18 +132,8 @@
             AIBinder_Weak_delete(mWeakBinder);
         }
         mWeakBinder = AIBinder_Weak_new(binder);
-
-        // WARNING: it is important that this class does not implement debug or
-        // shell functions because it does not use special C++ wrapper
-        // functions, and so this is how we test those functions.
     }
 
-    return binder;
-}
-
-binder_status_t IFoo::addService(const char* instance) {
-    AIBinder* binder = getBinder();
-
     binder_status_t status = AServiceManager_addService(binder, instance);
     // Strong references we care about kept by remote process
     AIBinder_decStrong(binder);
diff --git a/libs/binder/ndk/tests/include/iface/iface.h b/libs/binder/ndk/tests/include/iface/iface.h
index d9dd64b..cdf5493 100644
--- a/libs/binder/ndk/tests/include/iface/iface.h
+++ b/libs/binder/ndk/tests/include/iface/iface.h
@@ -30,9 +30,6 @@
 
     static AIBinder_Class* kClass;
 
-    // binder representing this interface with one reference count
-    AIBinder* getBinder();
-
     // Takes ownership of IFoo
     binder_status_t addService(const char* instance);
     static ::android::sp<IFoo> getService(const char* instance, AIBinder** outBinder = nullptr);
diff --git a/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp b/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
index 160b9f2..44d8ebf 100644
--- a/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
+++ b/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
@@ -185,26 +185,6 @@
     AIBinder_decStrong(binder);
 }
 
-TEST(NdkBinder, UnimplementedDump) {
-    sp<IFoo> foo = IFoo::getService(IFoo::kSomeInstanceName);
-    ASSERT_NE(foo, nullptr);
-    AIBinder* binder = foo->getBinder();
-    EXPECT_EQ(OK, AIBinder_dump(binder, STDOUT_FILENO, nullptr, 0));
-    AIBinder_decStrong(binder);
-}
-
-TEST(NdkBinder, UnimplementedShell) {
-    // libbinder_ndk doesn't support calling shell, so we are calling from the
-    // libbinder across processes to the NDK service which doesn't implement
-    // shell
-    static const sp<android::IServiceManager> sm(android::defaultServiceManager());
-    sp<IBinder> testService = sm->getService(String16(IFoo::kSomeInstanceName));
-
-    Vector<String16> argsVec;
-    EXPECT_EQ(OK, IBinder::shellCommand(testService, STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO,
-                                        argsVec, nullptr, nullptr));
-}
-
 TEST(NdkBinder, DoubleNumber) {
     sp<IFoo> foo = IFoo::getService(IFoo::kSomeInstanceName);
     ASSERT_NE(foo, nullptr);
diff --git a/services/sensorservice/SensorEventConnection.cpp b/services/sensorservice/SensorEventConnection.cpp
index b4b5f98..6c86712 100644
--- a/services/sensorservice/SensorEventConnection.cpp
+++ b/services/sensorservice/SensorEventConnection.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <log/log.h>
 #include <sys/socket.h>
 #include <utils/threads.h>
 
@@ -47,20 +48,13 @@
 SensorService::SensorEventConnection::~SensorEventConnection() {
     ALOGD_IF(DEBUG_CONNECTIONS, "~SensorEventConnection(%p)", this);
     destroy();
-}
-
-void SensorService::SensorEventConnection::destroy() {
-    Mutex::Autolock _l(mDestroyLock);
-
-    // destroy once only
-    if (mDestroyed) {
-        return;
-    }
-
     mService->cleanupConnection(this);
     if (mEventCache != nullptr) {
         delete[] mEventCache;
     }
+}
+
+void SensorService::SensorEventConnection::destroy() {
     mDestroyed = true;
 }
 
@@ -665,6 +659,11 @@
         int handle, bool enabled, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs,
         int reservedFlags)
 {
+    if (mDestroyed) {
+        android_errorWriteLog(0x534e4554, "168211968");
+        return DEAD_OBJECT;
+    }
+
     status_t err;
     if (enabled) {
         err = mService->enable(this, handle, samplingPeriodNs, maxBatchReportLatencyNs,
@@ -679,10 +678,19 @@
 status_t SensorService::SensorEventConnection::setEventRate(
         int handle, nsecs_t samplingPeriodNs)
 {
+    if (mDestroyed) {
+        android_errorWriteLog(0x534e4554, "168211968");
+        return DEAD_OBJECT;
+    }
+
     return mService->setEventRate(this, handle, samplingPeriodNs, mOpPackageName);
 }
 
 status_t  SensorService::SensorEventConnection::flush() {
+    if (mDestroyed) {
+        return DEAD_OBJECT;
+    }
+
     return  mService->flushSensor(this, mOpPackageName);
 }
 
diff --git a/services/sensorservice/SensorEventConnection.h b/services/sensorservice/SensorEventConnection.h
index 8f2d5db..9487a39 100644
--- a/services/sensorservice/SensorEventConnection.h
+++ b/services/sensorservice/SensorEventConnection.h
@@ -17,6 +17,7 @@
 #ifndef ANDROID_SENSOR_EVENT_CONNECTION_H
 #define ANDROID_SENSOR_EVENT_CONNECTION_H
 
+#include <atomic>
 #include <stdint.h>
 #include <sys/types.h>
 #include <unordered_map>
@@ -182,8 +183,8 @@
     int mTotalAcksNeeded, mTotalAcksReceived;
 #endif
 
-    mutable Mutex mDestroyLock;
-    bool mDestroyed;
+    // Used to track if this object was inappropriately used after destroy().
+    std::atomic_bool mDestroyed;
 
     // Store a mapping of sensor handles to required AppOp for a sensor. This map only contains a
     // valid mapping for sensors that require a permission in order to reduce the lookup time.