diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 49f74a2..968f8a4 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -2788,28 +2788,6 @@
     }
 }
 
-// hasAudioSession_l() must be called with ThreadBase::mLock held
-uint32_t AudioFlinger::PlaybackThread::hasAudioSession_l(audio_session_t sessionId) const
-{
-    uint32_t result = 0;
-    if (getEffectChain_l(sessionId) != 0) {
-        result = EFFECT_SESSION;
-    }
-
-    for (size_t i = 0; i < mTracks.size(); ++i) {
-        sp<Track> track = mTracks[i];
-        if (sessionId == track->sessionId() && !track->isInvalid()) {
-            result |= TRACK_SESSION;
-            if (track->isFastTrack()) {
-                result |= FAST_SESSION;
-            }
-            break;
-        }
-    }
-
-    return result;
-}
-
 uint32_t AudioFlinger::PlaybackThread::getStrategyForSession_l(audio_session_t sessionId)
 {
     // session AUDIO_SESSION_OUTPUT_MIX is placed in same strategy as MUSIC stream so that
@@ -8219,27 +8197,6 @@
     return 0;
 }
 
-// hasAudioSession_l() must be called with ThreadBase::mLock held
-uint32_t AudioFlinger::RecordThread::hasAudioSession_l(audio_session_t sessionId) const
-{
-    uint32_t result = 0;
-    if (getEffectChain_l(sessionId) != 0) {
-        result = EFFECT_SESSION;
-    }
-
-    for (size_t i = 0; i < mTracks.size(); ++i) {
-        if (sessionId == mTracks[i]->sessionId()) {
-            result |= TRACK_SESSION;
-            if (mTracks[i]->isFastTrack()) {
-                result |= FAST_SESSION;
-            }
-            break;
-        }
-    }
-
-    return result;
-}
-
 KeyedVector<audio_session_t, bool> AudioFlinger::RecordThread::sessionIds() const
 {
     KeyedVector<audio_session_t, bool> ids;
@@ -9048,28 +9005,6 @@
     return mEffectChains.size();
 }
 
-// hasAudioSession_l() must be called with ThreadBase::mLock held
-uint32_t AudioFlinger::MmapThread::hasAudioSession_l(audio_session_t sessionId) const
-{
-    uint32_t result = 0;
-    if (getEffectChain_l(sessionId) != 0) {
-        result = EFFECT_SESSION;
-    }
-
-    for (size_t i = 0; i < mActiveTracks.size(); i++) {
-        sp<MmapTrack> track = mActiveTracks[i];
-        if (sessionId == track->sessionId()) {
-            result |= TRACK_SESSION;
-            if (track->isFastTrack()) {
-                result |= FAST_SESSION;
-            }
-            break;
-        }
-    }
-
-    return result;
-}
-
 void AudioFlinger::MmapThread::threadLoop_standby()
 {
     mHalStream->standby();
diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index 97aa9f0..47e580b 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -356,6 +356,27 @@
                     return hasAudioSession_l(sessionId);
                 }
 
+                template <typename T>
+                uint32_t hasAudioSession_l(audio_session_t sessionId, const T& tracks) const {
+                    uint32_t result = 0;
+                    if (getEffectChain_l(sessionId) != 0) {
+                        result = EFFECT_SESSION;
+                    }
+                    for (size_t i = 0; i < tracks.size(); ++i) {
+                        const sp<TrackBase>& track = tracks[i];
+                        if (sessionId == track->sessionId()
+                                && !track->isInvalid()       // not yet removed from tracks.
+                                && !track->isTerminated()) {
+                            result |= TRACK_SESSION;
+                            if (track->isFastTrack()) {
+                                result |= FAST_SESSION;  // caution, only represents first track.
+                            }
+                            break;
+                        }
+                    }
+                    return result;
+                }
+
                 // the value returned by default implementation is not important as the
                 // strategy is only meaningful for PlaybackThread which implements this method
                 virtual uint32_t getStrategyForSession_l(audio_session_t sessionId __unused)
@@ -810,7 +831,9 @@
 
                 virtual status_t addEffectChain_l(const sp<EffectChain>& chain);
                 virtual size_t removeEffectChain_l(const sp<EffectChain>& chain);
-                virtual uint32_t hasAudioSession_l(audio_session_t sessionId) const;
+                        uint32_t hasAudioSession_l(audio_session_t sessionId) const override {
+                            return ThreadBase::hasAudioSession_l(sessionId, mTracks);
+                        }
                 virtual uint32_t getStrategyForSession_l(audio_session_t sessionId);
 
 
@@ -1550,7 +1573,9 @@
 
     virtual status_t addEffectChain_l(const sp<EffectChain>& chain);
     virtual size_t removeEffectChain_l(const sp<EffectChain>& chain);
-    virtual uint32_t hasAudioSession_l(audio_session_t sessionId) const;
+            uint32_t hasAudioSession_l(audio_session_t sessionId) const override {
+                         return ThreadBase::hasAudioSession_l(sessionId, mTracks);
+                     }
 
             // Return the set of unique session IDs across all tracks.
             // The keys are the session IDs, and the associated values are meaningless.
@@ -1725,7 +1750,10 @@
     virtual     status_t    checkEffectCompatibility_l(const effect_descriptor_t *desc,
                                                                audio_session_t sessionId);
 
-    virtual     uint32_t    hasAudioSession_l(audio_session_t sessionId) const;
+                uint32_t    hasAudioSession_l(audio_session_t sessionId) const override {
+                                // Note: using mActiveTracks as no mTracks here.
+                                return ThreadBase::hasAudioSession_l(sessionId, mActiveTracks);
+                            }
     virtual     status_t    setSyncEvent(const sp<SyncEvent>& event);
     virtual     bool        isValidSyncEvent(const sp<SyncEvent>& event) const;
 
diff --git a/services/audioflinger/TrackBase.h b/services/audioflinger/TrackBase.h
index e23173f..4402d99 100644
--- a/services/audioflinger/TrackBase.h
+++ b/services/audioflinger/TrackBase.h
@@ -94,6 +94,9 @@
     virtual void        invalidate() { mIsInvalid = true; }
             bool        isInvalid() const { return mIsInvalid; }
 
+            void        terminate() { mTerminated = true; }
+            bool        isTerminated() const { return mTerminated; }
+
     audio_attributes_t  attributes() const { return mAttr; }
 
 #ifdef TEE_SINK
@@ -228,14 +231,6 @@
         return mState == STOPPING_2;
     }
 
-    bool isTerminated() const {
-        return mTerminated;
-    }
-
-    void terminate() {
-        mTerminated = true;
-    }
-
     // Upper case characters are final states.
     // Lower case characters are transitory.
     const char *getTrackStateString() const {