Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d9bb126e authored by Martijn Coenen's avatar Martijn Coenen Committed by Automerger Merge Worker
Browse files

Merge "Repeat proxy limit callbacks if we keep going above the limit." am:... 

Merge "Repeat proxy limit callbacks if we keep going above the limit." am: c8600dc1 am: 8ffa7ecf am: f5652cf8 am: d03d5c93

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1818234

Change-Id: Ic6365e6c546b3a3eb597760c6f2e9faea9926527
parents f6a75c9e d03d5c93

libs/binder/BpBinder.cpp

+20 −2
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ namespace android { 


Mutex BpBinder::sTrackingLock;

std::unordered_map<int32_t, uint32_t> BpBinder::sTrackingMap;

std::unordered_map<int32_t, uint32_t> BpBinder::sLastLimitCallbackMap;

int BpBinder::sNumTrackedUids = 0;

std::atomic_bool BpBinder::sCountByUidEnabled(false);

binder_proxy_limit_callback BpBinder::sLimitCallback;
@@ -47,6 +48,10 @@ uint32_t BpBinder::sBinderProxyCountHighWatermark = 2500; 
// Another arbitrary value a binder count needs to drop below before another callback will be called

uint32_t BpBinder::sBinderProxyCountLowWatermark = 2000;



// Once the limit has been exceeded, keep calling the limit callback for every this many new proxies

// created over the limit.

constexpr uint32_t REPEAT_LIMIT_CALLBACK_INTERVAL = 1000;



enum {

    LIMIT_REACHED_MASK = 0x80000000,        // A flag denoting that the limit has been reached

    COUNTING_VALUE_MASK = 0x7FFFFFFF,       // A mask of the remaining bits for the count value
@@ -120,12 +125,24 @@ sp<BpBinder> BpBinder::create(int32_t handle) { 
            if (sBinderProxyThrottleCreate) {

                return nullptr;

            }

            trackedValue = trackedValue & COUNTING_VALUE_MASK;

            uint32_t lastLimitCallbackAt = sLastLimitCallbackMap[trackedUid];



            if (trackedValue > lastLimitCallbackAt &&

                (trackedValue - lastLimitCallbackAt > REPEAT_LIMIT_CALLBACK_INTERVAL)) {

                ALOGE("Still too many binder proxy objects sent to uid %d from uid %d (%d proxies "

                      "held)",

                      getuid(), trackedUid, trackedValue);

                if (sLimitCallback) sLimitCallback(trackedUid);

                sLastLimitCallbackMap[trackedUid] = trackedValue;

            }

        } else {

            if ((trackedValue & COUNTING_VALUE_MASK) >= sBinderProxyCountHighWatermark) {

                ALOGE("Too many binder proxy objects sent to uid %d from uid %d (%d proxies held)",

                      getuid(), trackedUid, trackedValue);

                sTrackingMap[trackedUid] |= LIMIT_REACHED_MASK;

                if (sLimitCallback) sLimitCallback(trackedUid);

                sLastLimitCallbackMap[trackedUid] = trackedValue & COUNTING_VALUE_MASK;

                if (sBinderProxyThrottleCreate) {

                    ALOGI("Throttling binder proxy creates from uid %d in uid %d until binder proxy"

                          " count drops below %d",
@@ -465,8 +482,9 @@ BpBinder::~BpBinder() 
                ((trackedValue & COUNTING_VALUE_MASK) <= sBinderProxyCountLowWatermark)

                )) {

                ALOGI("Limit reached bit reset for uid %d (fewer than %d proxies from uid %d held)",

                                   getuid(), mTrackedUid, sBinderProxyCountLowWatermark);

                      getuid(), sBinderProxyCountLowWatermark, mTrackedUid);

                sTrackingMap[mTrackedUid] &= ~LIMIT_REACHED_MASK;

                sLastLimitCallbackMap.erase(mTrackedUid);

            }

            if (--sTrackingMap[mTrackedUid] == 0) {

                sTrackingMap.erase(mTrackedUid);

libs/binder/include/binder/BpBinder.h

+1 −0
Original line number Diff line number Diff line
@@ -194,6 +194,7 @@ private: 
    static uint32_t                             sBinderProxyCountHighWatermark;

    static uint32_t                             sBinderProxyCountLowWatermark;

    static bool                                 sBinderProxyThrottleCreate;

    static std::unordered_map<int32_t,uint32_t> sLastLimitCallbackMap;

};



} // namespace android