Merge "Modify pilferpointers API to selectively cancel pointers"
diff --git a/cmds/installd/Android.bp b/cmds/installd/Android.bp
index bf5e893..0f7c489 100644
--- a/cmds/installd/Android.bp
+++ b/cmds/installd/Android.bp
@@ -72,8 +72,6 @@
         },
     },
 
-    clang: true,
-
     tidy: true,
     tidy_checks: [
         "-*",
@@ -128,7 +126,6 @@
 cc_test_host {
     name: "run_dex2oat_test",
     test_suites: ["general-tests"],
-    clang: true,
     srcs: [
         "run_dex2oat_test.cpp",
         "run_dex2oat.cpp",
@@ -188,7 +185,6 @@
         "-Wall",
         "-Werror",
     ],
-    clang: true,
 
     srcs: [
         "otapreopt_chroot.cpp",
diff --git a/cmds/installd/tests/Android.bp b/cmds/installd/tests/Android.bp
index b3baca5..07f73b9 100644
--- a/cmds/installd/tests/Android.bp
+++ b/cmds/installd/tests/Android.bp
@@ -11,7 +11,6 @@
 cc_test {
     name: "installd_utils_test",
     test_suites: ["device-tests"],
-    clang: true,
     srcs: ["installd_utils_test.cpp"],
     cflags: [
         "-Wall",
@@ -36,7 +35,6 @@
 cc_test {
     name: "installd_cache_test",
     test_suites: ["device-tests"],
-    clang: true,
     srcs: ["installd_cache_test.cpp"],
     cflags: [
         "-Wall",
@@ -82,7 +80,6 @@
 cc_test {
     name: "installd_service_test",
     test_suites: ["device-tests"],
-    clang: true,
     srcs: ["installd_service_test.cpp"],
     cflags: [
         "-Wall",
@@ -130,7 +127,6 @@
 cc_test {
     name: "installd_dexopt_test",
     test_suites: ["device-tests"],
-    clang: true,
     srcs: ["installd_dexopt_test.cpp"],
     cflags: [
         "-Wall",
@@ -177,7 +173,6 @@
 cc_test {
     name: "installd_otapreopt_test",
     test_suites: ["device-tests"],
-    clang: true,
     srcs: ["installd_otapreopt_test.cpp"],
     cflags: [
         "-Wall",
@@ -198,7 +193,6 @@
 cc_test {
     name: "installd_file_test",
     test_suites: ["device-tests"],
-    clang: true,
     srcs: ["installd_file_test.cpp"],
     cflags: [
         "-Wall",
diff --git a/include/input/Input.h b/include/input/Input.h
index b23a951..e7d68fc 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -837,6 +837,8 @@
     std::vector<PointerCoords> mSamplePointerCoords;
 };
 
+std::ostream& operator<<(std::ostream& out, const MotionEvent& event);
+
 /*
  * Focus events.
  */
diff --git a/include/input/InputDevice.h b/include/input/InputDevice.h
index c4f03c9..3585392 100644
--- a/include/input/InputDevice.h
+++ b/include/input/InputDevice.h
@@ -300,6 +300,8 @@
 /*
  * Gets the path of an input device configuration file, if one is available.
  * Considers both system provided and user installed configuration files.
+ * The optional suffix is appended to the end of the file name (before the
+ * extension).
  *
  * The device identifier is used to construct several default configuration file
  * names to try based on the device name, vendor, product, and version.
@@ -307,8 +309,8 @@
  * Returns an empty string if not found.
  */
 extern std::string getInputDeviceConfigurationFilePathByDeviceIdentifier(
-        const InputDeviceIdentifier& deviceIdentifier,
-        InputDeviceConfigurationFileType type);
+        const InputDeviceIdentifier& deviceIdentifier, InputDeviceConfigurationFileType type,
+        const char* suffix = "");
 
 /*
  * Gets the path of an input device configuration file, if one is available.
diff --git a/include/input/KeyLayoutMap.h b/include/input/KeyLayoutMap.h
index d1925f4..1da78aa 100644
--- a/include/input/KeyLayoutMap.h
+++ b/include/input/KeyLayoutMap.h
@@ -20,8 +20,8 @@
 #include <android-base/result.h>
 #include <stdint.h>
 #include <utils/Errors.h>
-#include <utils/KeyedVector.h>
 #include <utils/Tokenizer.h>
+#include <set>
 
 #include <input/InputDevice.h>
 
@@ -64,17 +64,18 @@
  */
 class KeyLayoutMap {
 public:
-    static base::Result<std::shared_ptr<KeyLayoutMap>> load(const std::string& filename);
+    static base::Result<std::shared_ptr<KeyLayoutMap>> load(const std::string& filename,
+                                                            const char* contents = nullptr);
     static base::Result<std::shared_ptr<KeyLayoutMap>> loadContents(const std::string& filename,
                                                                     const char* contents);
 
     status_t mapKey(int32_t scanCode, int32_t usageCode,
             int32_t* outKeyCode, uint32_t* outFlags) const;
-    status_t findScanCodesForKey(int32_t keyCode, std::vector<int32_t>* outScanCodes) const;
-    status_t findScanCodeForLed(int32_t ledCode, int32_t* outScanCode) const;
-    status_t findUsageCodeForLed(int32_t ledCode, int32_t* outUsageCode) const;
+    std::vector<int32_t> findScanCodesForKey(int32_t keyCode) const;
+    std::optional<int32_t> findScanCodeForLed(int32_t ledCode) const;
+    std::optional<int32_t> findUsageCodeForLed(int32_t ledCode) const;
 
-    status_t mapAxis(int32_t scanCode, AxisInfo* outAxisInfo) const;
+    std::optional<AxisInfo> mapAxis(int32_t scanCode) const;
     const std::string getLoadFileName() const;
     // Return pair of sensor type and sensor data index, for the input device abs code
     base::Result<std::pair<InputDeviceSensorType, int32_t>> mapSensor(int32_t absCode);
@@ -98,12 +99,13 @@
         int32_t sensorDataIndex;
     };
 
-    KeyedVector<int32_t, Key> mKeysByScanCode;
-    KeyedVector<int32_t, Key> mKeysByUsageCode;
-    KeyedVector<int32_t, AxisInfo> mAxes;
-    KeyedVector<int32_t, Led> mLedsByScanCode;
-    KeyedVector<int32_t, Led> mLedsByUsageCode;
+    std::unordered_map<int32_t, Key> mKeysByScanCode;
+    std::unordered_map<int32_t, Key> mKeysByUsageCode;
+    std::unordered_map<int32_t, AxisInfo> mAxes;
+    std::unordered_map<int32_t, Led> mLedsByScanCode;
+    std::unordered_map<int32_t, Led> mLedsByUsageCode;
     std::unordered_map<int32_t, Sensor> mSensorsByAbsCode;
+    std::set<std::string> mRequiredKernelConfigs;
     std::string mLoadFileName;
 
     KeyLayoutMap();
@@ -124,6 +126,7 @@
         status_t parseAxis();
         status_t parseLed();
         status_t parseSensor();
+        status_t parseRequiredKernelConfig();
     };
 };
 
diff --git a/include/input/Keyboard.h b/include/input/Keyboard.h
index 08ad8c6..9a3e15f 100644
--- a/include/input/Keyboard.h
+++ b/include/input/Keyboard.h
@@ -61,9 +61,7 @@
     bool probeKeyMap(const InputDeviceIdentifier& deviceIdentifier, const std::string& name);
     status_t loadKeyLayout(const InputDeviceIdentifier& deviceIdentifier, const std::string& name);
     status_t loadKeyCharacterMap(const InputDeviceIdentifier& deviceIdentifier,
-            const std::string& name);
-    std::string getPath(const InputDeviceIdentifier& deviceIdentifier,
-            const std::string& name, InputDeviceConfigurationFileType type);
+                                 const std::string& name);
 };
 
 /**
diff --git a/libs/arect/Android.bp b/libs/arect/Android.bp
index 41b3460..76e3e66 100644
--- a/libs/arect/Android.bp
+++ b/libs/arect/Android.bp
@@ -39,9 +39,16 @@
 
 cc_library_headers {
     name: "libarect_headers",
+    vendor_available: true,
+    min_sdk_version: "29",
     // TODO(b/153609531): remove when no longer needed.
     native_bridge_supported: true,
     export_include_dirs: ["include"],
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.media",
+        "com.android.media.swcodec",
+    ],
 }
 
 cc_library_static {
diff --git a/libs/attestation/Android.bp b/libs/attestation/Android.bp
index ea3c341..2bf15d4 100644
--- a/libs/attestation/Android.bp
+++ b/libs/attestation/Android.bp
@@ -28,11 +28,9 @@
         "-Werror",
     ],
     srcs: [
-        "HmacKeyManager.cpp"
+        "HmacKeyManager.cpp",
     ],
 
-    clang: true,
-
     shared_libs: [
         "liblog",
         "libcrypto",
diff --git a/libs/binder/Android.bp b/libs/binder/Android.bp
index 200586a..08a1428 100644
--- a/libs/binder/Android.bp
+++ b/libs/binder/Android.bp
@@ -199,7 +199,6 @@
         "libbinder_headers",
     ],
 
-    clang: true,
     sanitize: {
         misc_undefined: ["integer"],
     },
diff --git a/libs/binder/Binder.cpp b/libs/binder/Binder.cpp
index b66e89e..6a12e65 100644
--- a/libs/binder/Binder.cpp
+++ b/libs/binder/Binder.cpp
@@ -49,10 +49,11 @@
 static_assert(sizeof(BBinder) == 20);
 #endif
 
+// global b/c b/230079120 - consistent symbol table
 #ifdef BINDER_RPC_DEV_SERVERS
-constexpr const bool kEnableRpcDevServers = true;
+bool kEnableRpcDevServers = true;
 #else
-constexpr const bool kEnableRpcDevServers = false;
+bool kEnableRpcDevServers = false;
 #endif
 
 // Log any reply transactions for which the data exceeds this size
@@ -156,7 +157,7 @@
 
 status_t IBinder::setRpcClientDebug(android::base::unique_fd socketFd,
                                     const sp<IBinder>& keepAliveBinder) {
-    if constexpr (!kEnableRpcDevServers) {
+    if (!kEnableRpcDevServers) {
         ALOGW("setRpcClientDebug disallowed because RPC is not enabled");
         return INVALID_OPERATION;
     }
@@ -201,6 +202,7 @@
     RpcServerLink(const sp<RpcServer>& rpcServer, const sp<IBinder>& keepAliveBinder,
                   const wp<BBinder>& binder)
           : mRpcServer(rpcServer), mKeepAliveBinder(keepAliveBinder), mBinder(binder) {}
+    virtual ~RpcServerLink();
     void binderDied(const wp<IBinder>&) override {
         LOG_RPC_DETAIL("RpcServerLink: binder died, shutting down RpcServer");
         if (mRpcServer == nullptr) {
@@ -226,6 +228,7 @@
     sp<IBinder> mKeepAliveBinder; // hold to avoid automatically unlinking
     wp<BBinder> mBinder;
 };
+BBinder::RpcServerLink::~RpcServerLink() {}
 
 class BBinder::Extras
 {
@@ -496,7 +499,7 @@
 }
 
 status_t BBinder::setRpcClientDebug(const Parcel& data) {
-    if constexpr (!kEnableRpcDevServers) {
+    if (!kEnableRpcDevServers) {
         ALOGW("%s: disallowed because RPC is not enabled", __PRETTY_FUNCTION__);
         return INVALID_OPERATION;
     }
@@ -521,7 +524,7 @@
 
 status_t BBinder::setRpcClientDebug(android::base::unique_fd socketFd,
                                     const sp<IBinder>& keepAliveBinder) {
-    if constexpr (!kEnableRpcDevServers) {
+    if (!kEnableRpcDevServers) {
         ALOGW("%s: disallowed because RPC is not enabled", __PRETTY_FUNCTION__);
         return INVALID_OPERATION;
     }
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 58b0b35..038ce38 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -151,6 +151,10 @@
     ALOGE("Invalid object type 0x%08x", obj.hdr.type);
 }
 
+Parcel::RpcFields::RpcFields(const sp<RpcSession>& session) : mSession(session) {
+    LOG_ALWAYS_FATAL_IF(mSession == nullptr);
+}
+
 status_t Parcel::finishFlattenBinder(const sp<IBinder>& binder)
 {
     internal::Stability::tryMarkCompilationUnit(binder.get());
@@ -182,13 +186,14 @@
     if (binder) local = binder->localBinder();
     if (local) local->setParceled();
 
-    if (isForRpc()) {
+    if (const auto* rpcFields = maybeRpcFields()) {
         if (binder) {
             status_t status = writeInt32(1); // non-null
             if (status != OK) return status;
             uint64_t address;
             // TODO(b/167966510): need to undo this if the Parcel is not sent
-            status = mSession->state()->onBinderLeaving(mSession, binder, &address);
+            status = rpcFields->mSession->state()->onBinderLeaving(rpcFields->mSession, binder,
+                                                                   &address);
             if (status != OK) return status;
             status = writeUint64(address);
             if (status != OK) return status;
@@ -259,9 +264,7 @@
 
 status_t Parcel::unflattenBinder(sp<IBinder>* out) const
 {
-    if (isForRpc()) {
-        LOG_ALWAYS_FATAL_IF(mSession == nullptr, "RpcSession required to read from remote parcel");
-
+    if (const auto* rpcFields = maybeRpcFields()) {
         int32_t isPresent;
         status_t status = readInt32(&isPresent);
         if (status != OK) return status;
@@ -271,10 +274,14 @@
         if (isPresent & 1) {
             uint64_t addr;
             if (status_t status = readUint64(&addr); status != OK) return status;
-            if (status_t status = mSession->state()->onBinderEntering(mSession, addr, &binder);
+            if (status_t status =
+                        rpcFields->mSession->state()->onBinderEntering(rpcFields->mSession, addr,
+                                                                       &binder);
                 status != OK)
                 return status;
-            if (status_t status = mSession->state()->flushExcessBinderRefs(mSession, addr, binder);
+            if (status_t status =
+                        rpcFields->mSession->state()->flushExcessBinderRefs(rpcFields->mSession,
+                                                                            addr, binder);
                 status != OK)
                 return status;
         }
@@ -378,8 +385,10 @@
     }
 
     mDataPos = pos;
-    mNextObjectHint = 0;
-    mObjectsSorted = false;
+    if (const auto* kernelFields = maybeKernelFields()) {
+        kernelFields->mNextObjectHint = 0;
+        kernelFields->mObjectsSorted = false;
+    }
 }
 
 status_t Parcel::setDataCapacity(size_t size)
@@ -406,25 +415,27 @@
     if (err == NO_ERROR) {
         memcpy(const_cast<uint8_t*>(data()), buffer, len);
         mDataSize = len;
-        mFdsKnown = false;
+        if (auto* kernelFields = maybeKernelFields()) {
+            kernelFields->mFdsKnown = false;
+        }
     }
     return err;
 }
 
-status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len)
-{
-    if (mSession != parcel->mSession) {
+status_t Parcel::appendFrom(const Parcel* parcel, size_t offset, size_t len) {
+    if (isForRpc() != parcel->isForRpc()) {
         ALOGE("Cannot append Parcel from one context to another. They may be different formats, "
               "and objects are specific to a context.");
         return BAD_TYPE;
     }
+    if (isForRpc() && maybeRpcFields()->mSession != parcel->maybeRpcFields()->mSession) {
+        ALOGE("Cannot append Parcels from different sessions");
+        return BAD_TYPE;
+    }
 
     status_t err;
-    const uint8_t *data = parcel->mData;
-    const binder_size_t *objects = parcel->mObjects;
-    size_t size = parcel->mObjectsSize;
+    const uint8_t* data = parcel->mData;
     int startPos = mDataPos;
-    int firstIndex = -1, lastIndex = -2;
 
     if (len == 0) {
         return NO_ERROR;
@@ -443,18 +454,6 @@
         return BAD_VALUE;
     }
 
-    // Count objects in range
-    for (int i = 0; i < (int) size; i++) {
-        size_t off = objects[i];
-        if ((off >= offset) && (off + sizeof(flat_binder_object) <= offset + len)) {
-            if (firstIndex == -1) {
-                firstIndex = i;
-            }
-            lastIndex = i;
-        }
-    }
-    int numObjects = lastIndex - firstIndex + 1;
-
     if ((mDataSize+len) > mDataCapacity) {
         // grow data
         err = growData(len);
@@ -470,43 +469,63 @@
 
     err = NO_ERROR;
 
-    if (numObjects > 0) {
-        const sp<ProcessState> proc(ProcessState::self());
-        // grow objects
-        if (mObjectsCapacity < mObjectsSize + numObjects) {
-            if ((size_t) numObjects > SIZE_MAX - mObjectsSize) return NO_MEMORY; // overflow
-            if (mObjectsSize + numObjects > SIZE_MAX / 3) return NO_MEMORY; // overflow
-            size_t newSize = ((mObjectsSize + numObjects)*3)/2;
-            if (newSize > SIZE_MAX / sizeof(binder_size_t)) return NO_MEMORY; // overflow
-            binder_size_t *objects =
-                (binder_size_t*)realloc(mObjects, newSize*sizeof(binder_size_t));
-            if (objects == (binder_size_t*)nullptr) {
-                return NO_MEMORY;
+    if (auto* kernelFields = maybeKernelFields()) {
+        auto* otherKernelFields = parcel->maybeKernelFields();
+        LOG_ALWAYS_FATAL_IF(otherKernelFields == nullptr);
+
+        const binder_size_t* objects = otherKernelFields->mObjects;
+        size_t size = otherKernelFields->mObjectsSize;
+        // Count objects in range
+        int firstIndex = -1, lastIndex = -2;
+        for (int i = 0; i < (int)size; i++) {
+            size_t off = objects[i];
+            if ((off >= offset) && (off + sizeof(flat_binder_object) <= offset + len)) {
+                if (firstIndex == -1) {
+                    firstIndex = i;
+                }
+                lastIndex = i;
             }
-            mObjects = objects;
-            mObjectsCapacity = newSize;
         }
+        int numObjects = lastIndex - firstIndex + 1;
+        if (numObjects > 0) {
+            const sp<ProcessState> proc(ProcessState::self());
+            // grow objects
+            if (kernelFields->mObjectsCapacity < kernelFields->mObjectsSize + numObjects) {
+                if ((size_t)numObjects > SIZE_MAX - kernelFields->mObjectsSize)
+                    return NO_MEMORY; // overflow
+                if (kernelFields->mObjectsSize + numObjects > SIZE_MAX / 3)
+                    return NO_MEMORY; // overflow
+                size_t newSize = ((kernelFields->mObjectsSize + numObjects) * 3) / 2;
+                if (newSize > SIZE_MAX / sizeof(binder_size_t)) return NO_MEMORY; // overflow
+                binder_size_t* objects = (binder_size_t*)realloc(kernelFields->mObjects,
+                                                                 newSize * sizeof(binder_size_t));
+                if (objects == (binder_size_t*)nullptr) {
+                    return NO_MEMORY;
+                }
+                kernelFields->mObjects = objects;
+                kernelFields->mObjectsCapacity = newSize;
+            }
 
-        // append and acquire objects
-        int idx = mObjectsSize;
-        for (int i = firstIndex; i <= lastIndex; i++) {
-            size_t off = objects[i] - offset + startPos;
-            mObjects[idx++] = off;
-            mObjectsSize++;
+            // append and acquire objects
+            int idx = kernelFields->mObjectsSize;
+            for (int i = firstIndex; i <= lastIndex; i++) {
+                size_t off = objects[i] - offset + startPos;
+                kernelFields->mObjects[idx++] = off;
+                kernelFields->mObjectsSize++;
 
-            flat_binder_object* flat
-                = reinterpret_cast<flat_binder_object*>(mData + off);
-            acquire_object(proc, *flat, this);
+                flat_binder_object* flat = reinterpret_cast<flat_binder_object*>(mData + off);
+                acquire_object(proc, *flat, this);
 
-            if (flat->hdr.type == BINDER_TYPE_FD) {
-                // If this is a file descriptor, we need to dup it so the
-                // new Parcel now owns its own fd, and can declare that we
-                // officially know we have fds.
-                flat->handle = fcntl(flat->handle, F_DUPFD_CLOEXEC, 0);
-                flat->cookie = 1;
-                mHasFds = mFdsKnown = true;
-                if (!mAllowFds) {
-                    err = FDS_NOT_ALLOWED;
+                if (flat->hdr.type == BINDER_TYPE_FD) {
+                    // If this is a file descriptor, we need to dup it so the
+                    // new Parcel now owns its own fd, and can declare that we
+                    // officially know we have fds.
+                    flat->handle = fcntl(flat->handle, F_DUPFD_CLOEXEC, 0);
+                    flat->cookie = 1;
+                    kernelFields->mHasFds = kernelFields->mFdsKnown = true;
+                    if (!mAllowFds) {
+                        err = FDS_NOT_ALLOWED;
+                    }
                 }
             }
         }
@@ -563,18 +582,27 @@
 
 bool Parcel::hasFileDescriptors() const
 {
-    if (!mFdsKnown) {
+    if (const auto* rpcFields = maybeRpcFields()) {
+        return false;
+    }
+    auto* kernelFields = maybeKernelFields();
+    if (!kernelFields->mFdsKnown) {
         scanForFds();
     }
-    return mHasFds;
+    return kernelFields->mHasFds;
 }
 
 std::vector<sp<IBinder>> Parcel::debugReadAllStrongBinders() const {
     std::vector<sp<IBinder>> ret;
 
+    const auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return ret;
+    }
+
     size_t initPosition = dataPosition();
-    for (size_t i = 0; i < mObjectsSize; i++) {
-        binder_size_t offset = mObjects[i];
+    for (size_t i = 0; i < kernelFields->mObjectsSize; i++) {
+        binder_size_t offset = kernelFields->mObjects[i];
         const flat_binder_object* flat =
                 reinterpret_cast<const flat_binder_object*>(mData + offset);
         if (flat->hdr.type != BINDER_TYPE_BINDER) continue;
@@ -592,9 +620,14 @@
 std::vector<int> Parcel::debugReadAllFileDescriptors() const {
     std::vector<int> ret;
 
+    const auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return ret;
+    }
+
     size_t initPosition = dataPosition();
-    for (size_t i = 0; i < mObjectsSize; i++) {
-        binder_size_t offset = mObjects[i];
+    for (size_t i = 0; i < kernelFields->mObjectsSize; i++) {
+        binder_size_t offset = kernelFields->mObjects[i];
         const flat_binder_object* flat =
                 reinterpret_cast<const flat_binder_object*>(mData + offset);
         if (flat->hdr.type != BINDER_TYPE_FD) continue;
@@ -611,6 +644,10 @@
 }
 
 status_t Parcel::hasFileDescriptorsInRange(size_t offset, size_t len, bool* result) const {
+    const auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return BAD_TYPE;
+    }
     if (len > INT32_MAX || offset > INT32_MAX) {
         // Don't accept size_t values which may have come from an inadvertent conversion from a
         // negative int.
@@ -621,12 +658,15 @@
         return BAD_VALUE;
     }
     *result = false;
-    for (size_t i = 0; i < mObjectsSize; i++) {
-        size_t pos = mObjects[i];
+    for (size_t i = 0; i < kernelFields->mObjectsSize; i++) {
+        size_t pos = kernelFields->mObjects[i];
         if (pos < offset) continue;
         if (pos + sizeof(flat_binder_object) > offset + len) {
-          if (mObjectsSorted) break;
-          else continue;
+            if (kernelFields->mObjectsSorted) {
+                break;
+            } else {
+                continue;
+            }
         }
         const flat_binder_object* flat = reinterpret_cast<const flat_binder_object*>(mData + pos);
         if (flat->hdr.type == BINDER_TYPE_FD) {
@@ -654,20 +694,24 @@
     LOG_ALWAYS_FATAL_IF(mData != nullptr && mOwner == nullptr,
                         "format must be set before data is written OR on IPC data");
 
-    LOG_ALWAYS_FATAL_IF(session == nullptr, "markForRpc requires session");
-    mSession = session;
+    mVariantFields.emplace<RpcFields>(session);
 }
 
 bool Parcel::isForRpc() const {
-    return mSession != nullptr;
+    return std::holds_alternative<RpcFields>(mVariantFields);
 }
 
 void Parcel::updateWorkSourceRequestHeaderPosition() const {
+    auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return;
+    }
+
     // Only update the request headers once. We only want to point
     // to the first headers read/written.
-    if (!mRequestHeaderPresent) {
-        mWorkSourceRequestHeaderPosition = dataPosition();
-        mRequestHeaderPresent = true;
+    if (!kernelFields->mRequestHeaderPresent) {
+        kernelFields->mWorkSourceRequestHeaderPosition = dataPosition();
+        kernelFields->mRequestHeaderPresent = true;
     }
 }
 
@@ -686,7 +730,7 @@
 }
 
 status_t Parcel::writeInterfaceToken(const char16_t* str, size_t len) {
-    if (CC_LIKELY(!isForRpc())) {
+    if (auto* kernelFields = maybeKernelFields()) {
         const IPCThreadState* threadState = IPCThreadState::self();
         writeInt32(threadState->getStrictModePolicy() | STRICT_MODE_PENALTY_GATHER);
         updateWorkSourceRequestHeaderPosition();
@@ -701,12 +745,16 @@
 
 bool Parcel::replaceCallingWorkSourceUid(uid_t uid)
 {
-    if (!mRequestHeaderPresent) {
+    auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return false;
+    }
+    if (!kernelFields->mRequestHeaderPresent) {
         return false;
     }
 
     const size_t initialPosition = dataPosition();
-    setDataPosition(mWorkSourceRequestHeaderPosition);
+    setDataPosition(kernelFields->mWorkSourceRequestHeaderPosition);
     status_t err = writeInt32(uid);
     setDataPosition(initialPosition);
     return err == NO_ERROR;
@@ -714,12 +762,16 @@
 
 uid_t Parcel::readCallingWorkSourceUid() const
 {
-    if (!mRequestHeaderPresent) {
+    auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return false;
+    }
+    if (!kernelFields->mRequestHeaderPresent) {
         return IPCThreadState::kUnsetWorkSource;
     }
 
     const size_t initialPosition = dataPosition();
-    setDataPosition(mWorkSourceRequestHeaderPosition);
+    setDataPosition(kernelFields->mWorkSourceRequestHeaderPosition);
     uid_t uid = readInt32();
     setDataPosition(initialPosition);
     return uid;
@@ -740,7 +792,7 @@
                               size_t len,
                               IPCThreadState* threadState) const
 {
-    if (CC_LIKELY(!isForRpc())) {
+    if (auto* kernelFields = maybeKernelFields()) {
         // StrictModePolicy.
         int32_t strictPolicy = readInt32();
         if (threadState == nullptr) {
@@ -795,7 +847,10 @@
 
 size_t Parcel::objectsCount() const
 {
-    return mObjectsSize;
+    if (const auto* kernelFields = maybeKernelFields()) {
+        return kernelFields->mObjectsSize;
+    }
+    return 0;
 }
 
 status_t Parcel::errorCheck() const
@@ -1401,8 +1456,11 @@
 
 status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData)
 {
+    auto* kernelFields = maybeKernelFields();
+    LOG_ALWAYS_FATAL_IF(kernelFields == nullptr, "Can't write flat_binder_object to RPC Parcel");
+
     const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity;
-    const bool enoughObjects = mObjectsSize < mObjectsCapacity;
+    const bool enoughObjects = kernelFields->mObjectsSize < kernelFields->mObjectsCapacity;
     if (enoughData && enoughObjects) {
 restart_write:
         *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val;
@@ -1413,14 +1471,14 @@
                 // fail before modifying our object index
                 return FDS_NOT_ALLOWED;
             }
-            mHasFds = mFdsKnown = true;
+            kernelFields->mHasFds = kernelFields->mFdsKnown = true;
         }
 
         // Need to write meta-data?
         if (nullMetaData || val.binder != 0) {
-            mObjects[mObjectsSize] = mDataPos;
+            kernelFields->mObjects[kernelFields->mObjectsSize] = mDataPos;
             acquire_object(ProcessState::self(), val, this);
-            mObjectsSize++;
+            kernelFields->mObjectsSize++;
         }
 
         return finishWrite(sizeof(flat_binder_object));
@@ -1431,14 +1489,15 @@
         if (err != NO_ERROR) return err;
     }
     if (!enoughObjects) {
-        if (mObjectsSize > SIZE_MAX - 2) return NO_MEMORY; // overflow
-        if ((mObjectsSize + 2) > SIZE_MAX / 3) return NO_MEMORY; // overflow
-        size_t newSize = ((mObjectsSize+2)*3)/2;
+        if (kernelFields->mObjectsSize > SIZE_MAX - 2) return NO_MEMORY;       // overflow
+        if ((kernelFields->mObjectsSize + 2) > SIZE_MAX / 3) return NO_MEMORY; // overflow
+        size_t newSize = ((kernelFields->mObjectsSize + 2) * 3) / 2;
         if (newSize > SIZE_MAX / sizeof(binder_size_t)) return NO_MEMORY; // overflow
-        binder_size_t* objects = (binder_size_t*)realloc(mObjects, newSize*sizeof(binder_size_t));
+        binder_size_t* objects =
+                (binder_size_t*)realloc(kernelFields->mObjects, newSize * sizeof(binder_size_t));
         if (objects == nullptr) return NO_MEMORY;
-        mObjects = objects;
-        mObjectsCapacity = newSize;
+        kernelFields->mObjects = objects;
+        kernelFields->mObjectsCapacity = newSize;
     }
 
     goto restart_write;
@@ -1452,54 +1511,64 @@
 
 status_t Parcel::validateReadData(size_t upperBound) const
 {
+    const auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        // Can't validate RPC Parcel reads because the location of binder
+        // objects is unknown.
+        return OK;
+    }
+
     // Don't allow non-object reads on object data
-    if (mObjectsSorted || mObjectsSize <= 1) {
-data_sorted:
+    if (kernelFields->mObjectsSorted || kernelFields->mObjectsSize <= 1) {
+    data_sorted:
         // Expect to check only against the next object
-        if (mNextObjectHint < mObjectsSize && upperBound > mObjects[mNextObjectHint]) {
+        if (kernelFields->mNextObjectHint < kernelFields->mObjectsSize &&
+            upperBound > kernelFields->mObjects[kernelFields->mNextObjectHint]) {
             // For some reason the current read position is greater than the next object
             // hint. Iterate until we find the right object
-            size_t nextObject = mNextObjectHint;
+            size_t nextObject = kernelFields->mNextObjectHint;
             do {
-                if (mDataPos < mObjects[nextObject] + sizeof(flat_binder_object)) {
+                if (mDataPos < kernelFields->mObjects[nextObject] + sizeof(flat_binder_object)) {
                     // Requested info overlaps with an object
                     ALOGE("Attempt to read from protected data in Parcel %p", this);
                     return PERMISSION_DENIED;
                 }
                 nextObject++;
-            } while (nextObject < mObjectsSize && upperBound > mObjects[nextObject]);
-            mNextObjectHint = nextObject;
+            } while (nextObject < kernelFields->mObjectsSize &&
+                     upperBound > kernelFields->mObjects[nextObject]);
+            kernelFields->mNextObjectHint = nextObject;
         }
         return NO_ERROR;
     }
     // Quickly determine if mObjects is sorted.
-    binder_size_t* currObj = mObjects + mObjectsSize - 1;
+    binder_size_t* currObj = kernelFields->mObjects + kernelFields->mObjectsSize - 1;
     binder_size_t* prevObj = currObj;
-    while (currObj > mObjects) {
+    while (currObj > kernelFields->mObjects) {
         prevObj--;
         if(*prevObj > *currObj) {
             goto data_unsorted;
         }
         currObj--;
     }
-    mObjectsSorted = true;
+    kernelFields->mObjectsSorted = true;
     goto data_sorted;
 
 data_unsorted:
     // Insertion Sort mObjects
     // Great for mostly sorted lists. If randomly sorted or reverse ordered mObjects become common,
     // switch to std::sort(mObjects, mObjects + mObjectsSize);
-    for (binder_size_t* iter0 = mObjects + 1; iter0 < mObjects + mObjectsSize; iter0++) {
+    for (binder_size_t* iter0 = kernelFields->mObjects + 1;
+         iter0 < kernelFields->mObjects + kernelFields->mObjectsSize; iter0++) {
         binder_size_t temp = *iter0;
         binder_size_t* iter1 = iter0 - 1;
-        while (iter1 >= mObjects && *iter1 > temp) {
+        while (iter1 >= kernelFields->mObjects && *iter1 > temp) {
             *(iter1 + 1) = *iter1;
             iter1--;
         }
         *(iter1 + 1) = temp;
     }
-    mNextObjectHint = 0;
-    mObjectsSorted = true;
+    kernelFields->mNextObjectHint = 0;
+    kernelFields->mObjectsSorted = true;
     goto data_sorted;
 }
 
@@ -1513,7 +1582,8 @@
 
     if ((mDataPos+pad_size(len)) >= mDataPos && (mDataPos+pad_size(len)) <= mDataSize
             && len <= pad_size(len)) {
-        if (mObjectsSize > 0) {
+        const auto* kernelFields = maybeKernelFields();
+        if (kernelFields != nullptr && kernelFields->mObjectsSize > 0) {
             status_t err = validateReadData(mDataPos + pad_size(len));
             if(err != NO_ERROR) {
                 // Still increment the data position by the expected length
@@ -1540,7 +1610,8 @@
 
     if ((mDataPos+pad_size(len)) >= mDataPos && (mDataPos+pad_size(len)) <= mDataSize
             && len <= pad_size(len)) {
-        if (mObjectsSize > 0) {
+        const auto* kernelFields = maybeKernelFields();
+        if (kernelFields != nullptr && kernelFields->mObjectsSize > 0) {
             status_t err = validateReadData(mDataPos + pad_size(len));
             if(err != NO_ERROR) {
                 // Still increment the data position by the expected length
@@ -1587,7 +1658,8 @@
     static_assert(std::is_trivially_copyable_v<T>);
 
     if ((mDataPos+sizeof(T)) <= mDataSize) {
-        if (mObjectsSize > 0) {
+        const auto* kernelFields = maybeKernelFields();
+        if (kernelFields != nullptr && kernelFields->mObjectsSize > 0) {
             status_t err = validateReadData(mDataPos + sizeof(T));
             if(err != NO_ERROR) {
                 // Still increment the data position by the expected length
@@ -2132,6 +2204,11 @@
 }
 const flat_binder_object* Parcel::readObject(bool nullMetaData) const
 {
+    const auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return nullptr;
+    }
+
     const size_t DPOS = mDataPos;
     if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) {
         const flat_binder_object* obj
@@ -2146,9 +2223,9 @@
         }
 
         // Ensure that this object is valid...
-        binder_size_t* const OBJS = mObjects;
-        const size_t N = mObjectsSize;
-        size_t opos = mNextObjectHint;
+        binder_size_t* const OBJS = kernelFields->mObjects;
+        const size_t N = kernelFields->mObjectsSize;
+        size_t opos = kernelFields->mNextObjectHint;
 
         if (N > 0) {
             ALOGV("Parcel %p looking for obj at %zu, hint=%zu",
@@ -2167,7 +2244,7 @@
                 // Found it!
                 ALOGV("Parcel %p found obj %zu at index %zu with forward search",
                      this, DPOS, opos);
-                mNextObjectHint = opos+1;
+                kernelFields->mNextObjectHint = opos + 1;
                 ALOGV("readObject Setting data pos of %p to %zu", this, mDataPos);
                 return obj;
             }
@@ -2180,7 +2257,7 @@
                 // Found it!
                 ALOGV("Parcel %p found obj %zu at index %zu with backward search",
                      this, DPOS, opos);
-                mNextObjectHint = opos+1;
+                kernelFields->mNextObjectHint = opos + 1;
                 ALOGV("readObject Setting data pos of %p to %zu", this, mDataPos);
                 return obj;
             }
@@ -2191,16 +2268,19 @@
     return nullptr;
 }
 
-void Parcel::closeFileDescriptors()
-{
-    size_t i = mObjectsSize;
+void Parcel::closeFileDescriptors() {
+    auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return;
+    }
+    size_t i = kernelFields->mObjectsSize;
     if (i > 0) {
         //ALOGI("Closing file descriptors for %zu objects...", i);
     }
     while (i > 0) {
         i--;
-        const flat_binder_object* flat
-            = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]);
+        const flat_binder_object* flat =
+                reinterpret_cast<flat_binder_object*>(mData + kernelFields->mObjects[i]);
         if (flat->hdr.type == BINDER_TYPE_FD) {
             //ALOGI("Closing fd: %ld", flat->handle);
             close(flat->handle);
@@ -2220,35 +2300,43 @@
 
 uintptr_t Parcel::ipcObjects() const
 {
-    return reinterpret_cast<uintptr_t>(mObjects);
+    if (const auto* kernelFields = maybeKernelFields()) {
+        return reinterpret_cast<uintptr_t>(kernelFields->mObjects);
+    }
+    return 0;
 }
 
 size_t Parcel::ipcObjectsCount() const
 {
-    return mObjectsSize;
+    if (const auto* kernelFields = maybeKernelFields()) {
+        return kernelFields->mObjectsSize;
+    }
+    return 0;
 }
 
-void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize,
-    const binder_size_t* objects, size_t objectsCount, release_func relFunc)
-{
+void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, const binder_size_t* objects,
+                                 size_t objectsCount, release_func relFunc) {
     // this code uses 'mOwner == nullptr' to understand whether it owns memory
     LOG_ALWAYS_FATAL_IF(relFunc == nullptr, "must provide cleanup function");
 
     freeData();
 
+    auto* kernelFields = maybeKernelFields();
+    LOG_ALWAYS_FATAL_IF(kernelFields == nullptr); // guaranteed by freeData.
+
     mData = const_cast<uint8_t*>(data);
     mDataSize = mDataCapacity = dataSize;
-    mObjects = const_cast<binder_size_t*>(objects);
-    mObjectsSize = mObjectsCapacity = objectsCount;
+    kernelFields->mObjects = const_cast<binder_size_t*>(objects);
+    kernelFields->mObjectsSize = kernelFields->mObjectsCapacity = objectsCount;
     mOwner = relFunc;
 
     binder_size_t minOffset = 0;
-    for (size_t i = 0; i < mObjectsSize; i++) {
-        binder_size_t offset = mObjects[i];
+    for (size_t i = 0; i < kernelFields->mObjectsSize; i++) {
+        binder_size_t offset = kernelFields->mObjects[i];
         if (offset < minOffset) {
             ALOGE("%s: bad object offset %" PRIu64 " < %" PRIu64 "\n",
                   __func__, (uint64_t)offset, (uint64_t)minOffset);
-            mObjectsSize = 0;
+            kernelFields->mObjectsSize = 0;
             break;
         }
         const flat_binder_object* flat
@@ -2266,7 +2354,7 @@
 
             // WARNING: callers of ipcSetDataReference need to make sure they
             // don't rely on mObjectsSize in their release_func.
-            mObjectsSize = 0;
+            kernelFields->mObjectsSize = 0;
             break;
         }
         minOffset = offset + sizeof(flat_binder_object);
@@ -2274,6 +2362,21 @@
     scanForFds();
 }
 
+void Parcel::rpcSetDataReference(const sp<RpcSession>& session, const uint8_t* data,
+                                 size_t dataSize, release_func relFunc) {
+    // this code uses 'mOwner == nullptr' to understand whether it owns memory
+    LOG_ALWAYS_FATAL_IF(relFunc == nullptr, "must provide cleanup function");
+
+    LOG_ALWAYS_FATAL_IF(session == nullptr);
+
+    freeData();
+    markForRpc(session);
+
+    mData = const_cast<uint8_t*>(data);
+    mDataSize = mDataCapacity = dataSize;
+    mOwner = relFunc;
+}
+
 void Parcel::print(TextOutput& to, uint32_t /*flags*/) const
 {
     to << "Parcel(";
@@ -2284,14 +2387,16 @@
     } else if (dataSize() > 0) {
         const uint8_t* DATA = data();
         to << indent << HexDump(DATA, dataSize()) << dedent;
-        const binder_size_t* OBJS = mObjects;
-        const size_t N = objectsCount();
-        for (size_t i=0; i<N; i++) {
-            const flat_binder_object* flat
-                = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]);
-            to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": "
-                << TypeCode(flat->hdr.type & 0x7f7f7f00)
-                << " = " << flat->binder;
+        if (const auto* kernelFields = maybeKernelFields()) {
+            const binder_size_t* OBJS = kernelFields->mObjects;
+            const size_t N = objectsCount();
+            for (size_t i = 0; i < N; i++) {
+                const flat_binder_object* flat =
+                        reinterpret_cast<const flat_binder_object*>(DATA + OBJS[i]);
+                to << endl
+                   << "Object #" << i << " @ " << (void*)OBJS[i] << ": "
+                   << TypeCode(flat->hdr.type & 0x7f7f7f00) << " = " << flat->binder;
+            }
         }
     } else {
         to << "NULL";
@@ -2302,34 +2407,42 @@
 
 void Parcel::releaseObjects()
 {
-    size_t i = mObjectsSize;
+    auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return;
+    }
+
+    size_t i = kernelFields->mObjectsSize;
     if (i == 0) {
         return;
     }
     sp<ProcessState> proc(ProcessState::self());
     uint8_t* const data = mData;
-    binder_size_t* const objects = mObjects;
+    binder_size_t* const objects = kernelFields->mObjects;
     while (i > 0) {
         i--;
-        const flat_binder_object* flat
-            = reinterpret_cast<flat_binder_object*>(data+objects[i]);
+        const flat_binder_object* flat = reinterpret_cast<flat_binder_object*>(data + objects[i]);
         release_object(proc, *flat, this);
     }
 }
 
 void Parcel::acquireObjects()
 {
-    size_t i = mObjectsSize;
+    auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return;
+    }
+
+    size_t i = kernelFields->mObjectsSize;
     if (i == 0) {
         return;
     }
     const sp<ProcessState> proc(ProcessState::self());
     uint8_t* const data = mData;
-    binder_size_t* const objects = mObjects;
+    binder_size_t* const objects = kernelFields->mObjects;
     while (i > 0) {
         i--;
-        const flat_binder_object* flat
-            = reinterpret_cast<flat_binder_object*>(data+objects[i]);
+        const flat_binder_object* flat = reinterpret_cast<flat_binder_object*>(data + objects[i]);
         acquire_object(proc, *flat, this);
     }
 }
@@ -2345,7 +2458,9 @@
     if (mOwner) {
         LOG_ALLOC("Parcel %p: freeing other owner data", this);
         //ALOGI("Freeing data ref of %p (pid=%d)", this, getpid());
-        mOwner(this, mData, mDataSize, mObjects, mObjectsSize);
+        auto* kernelFields = maybeKernelFields();
+        mOwner(this, mData, mDataSize, kernelFields ? kernelFields->mObjects : nullptr,
+               kernelFields ? kernelFields->mObjectsSize : 0);
     } else {
         LOG_ALLOC("Parcel %p: freeing allocated data", this);
         releaseObjects();
@@ -2358,7 +2473,8 @@
             }
             free(mData);
         }
-        if (mObjects) free(mObjects);
+        auto* kernelFields = maybeKernelFields();
+        if (kernelFields && kernelFields->mObjects) free(kernelFields->mObjects);
     }
 }
 
@@ -2433,13 +2549,15 @@
     ALOGV("restartWrite Setting data size of %p to %zu", this, mDataSize);
     ALOGV("restartWrite Setting data pos of %p to %zu", this, mDataPos);
 
-    free(mObjects);
-    mObjects = nullptr;
-    mObjectsSize = mObjectsCapacity = 0;
-    mNextObjectHint = 0;
-    mObjectsSorted = false;
-    mHasFds = false;
-    mFdsKnown = true;
+    if (auto* kernelFields = maybeKernelFields()) {
+        free(kernelFields->mObjects);
+        kernelFields->mObjects = nullptr;
+        kernelFields->mObjectsSize = kernelFields->mObjectsCapacity = 0;
+        kernelFields->mNextObjectHint = 0;
+        kernelFields->mObjectsSorted = false;
+        kernelFields->mHasFds = false;
+        kernelFields->mFdsKnown = true;
+    }
     mAllowFds = true;
 
     return NO_ERROR;
@@ -2453,16 +2571,17 @@
         return BAD_VALUE;
     }
 
+    auto* kernelFields = maybeKernelFields();
+
     // If shrinking, first adjust for any objects that appear
     // after the new data size.
-    size_t objectsSize = mObjectsSize;
-    if (desired < mDataSize) {
+    size_t objectsSize = kernelFields ? kernelFields->mObjectsSize : 0;
+    if (kernelFields && desired < mDataSize) {
         if (desired == 0) {
             objectsSize = 0;
         } else {
             while (objectsSize > 0) {
-                if (mObjects[objectsSize-1] < desired)
-                    break;
+                if (kernelFields->mObjects[objectsSize - 1] < desired) break;
                 objectsSize--;
             }
         }
@@ -2495,20 +2614,21 @@
 
             // Little hack to only acquire references on objects
             // we will be keeping.
-            size_t oldObjectsSize = mObjectsSize;
-            mObjectsSize = objectsSize;
+            size_t oldObjectsSize = kernelFields->mObjectsSize;
+            kernelFields->mObjectsSize = objectsSize;
             acquireObjects();
-            mObjectsSize = oldObjectsSize;
+            kernelFields->mObjectsSize = oldObjectsSize;
         }
 
         if (mData) {
             memcpy(data, mData, mDataSize < desired ? mDataSize : desired);
         }
-        if (objects && mObjects) {
-            memcpy(objects, mObjects, objectsSize*sizeof(binder_size_t));
+        if (objects && kernelFields && kernelFields->mObjects) {
+            memcpy(objects, kernelFields->mObjects, objectsSize * sizeof(binder_size_t));
         }
         //ALOGI("Freeing data ref of %p (pid=%d)", this, getpid());
-        mOwner(this, mData, mDataSize, mObjects, mObjectsSize);
+        mOwner(this, mData, mDataSize, kernelFields ? kernelFields->mObjects : nullptr,
+               kernelFields ? kernelFields->mObjectsSize : 0);
         mOwner = nullptr;
 
         LOG_ALLOC("Parcel %p: taking ownership of %zu capacity", this, desired);
@@ -2516,43 +2636,46 @@
         gParcelGlobalAllocCount++;
 
         mData = data;
-        mObjects = objects;
         mDataSize = (mDataSize < desired) ? mDataSize : desired;
         ALOGV("continueWrite Setting data size of %p to %zu", this, mDataSize);
         mDataCapacity = desired;
-        mObjectsSize = mObjectsCapacity = objectsSize;
-        mNextObjectHint = 0;
-        mObjectsSorted = false;
+        if (kernelFields) {
+            kernelFields->mObjects = objects;
+            kernelFields->mObjectsSize = kernelFields->mObjectsCapacity = objectsSize;
+            kernelFields->mNextObjectHint = 0;
+            kernelFields->mObjectsSorted = false;
+        }
 
     } else if (mData) {
-        if (objectsSize < mObjectsSize) {
+        if (kernelFields && objectsSize < kernelFields->mObjectsSize) {
             // Need to release refs on any objects we are dropping.
             const sp<ProcessState> proc(ProcessState::self());
-            for (size_t i=objectsSize; i<mObjectsSize; i++) {
-                const flat_binder_object* flat
-                    = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]);
+            for (size_t i = objectsSize; i < kernelFields->mObjectsSize; i++) {
+                const flat_binder_object* flat =
+                        reinterpret_cast<flat_binder_object*>(mData + kernelFields->mObjects[i]);
                 if (flat->hdr.type == BINDER_TYPE_FD) {
                     // will need to rescan because we may have lopped off the only FDs
-                    mFdsKnown = false;
+                    kernelFields->mFdsKnown = false;
                 }
                 release_object(proc, *flat, this);
             }
 
             if (objectsSize == 0) {
-                free(mObjects);
-                mObjects = nullptr;
-                mObjectsCapacity = 0;
+                free(kernelFields->mObjects);
+                kernelFields->mObjects = nullptr;
+                kernelFields->mObjectsCapacity = 0;
             } else {
                 binder_size_t* objects =
-                    (binder_size_t*)realloc(mObjects, objectsSize*sizeof(binder_size_t));
+                        (binder_size_t*)realloc(kernelFields->mObjects,
+                                                objectsSize * sizeof(binder_size_t));
                 if (objects) {
-                    mObjects = objects;
-                    mObjectsCapacity = objectsSize;
+                    kernelFields->mObjects = objects;
+                    kernelFields->mObjectsCapacity = objectsSize;
                 }
             }
-            mObjectsSize = objectsSize;
-            mNextObjectHint = 0;
-            mObjectsSorted = false;
+            kernelFields->mObjectsSize = objectsSize;
+            kernelFields->mNextObjectHint = 0;
+            kernelFields->mObjectsSorted = false;
         }
 
         // We own the data, so we can just do a realloc().
@@ -2588,9 +2711,12 @@
             return NO_MEMORY;
         }
 
-        if(!(mDataCapacity == 0 && mObjects == nullptr
-             && mObjectsCapacity == 0)) {
-            ALOGE("continueWrite: %zu/%p/%zu/%zu", mDataCapacity, mObjects, mObjectsCapacity, desired);
+        if (!(mDataCapacity == 0 &&
+              (kernelFields == nullptr ||
+               (kernelFields->mObjects == nullptr && kernelFields->mObjectsCapacity == 0)))) {
+            ALOGE("continueWrite: %zu/%p/%zu/%zu", mDataCapacity,
+                  kernelFields ? kernelFields->mObjects : nullptr,
+                  kernelFields ? kernelFields->mObjectsCapacity : 0, desired);
         }
 
         LOG_ALLOC("Parcel %p: allocating with %zu capacity", this, desired);
@@ -2617,19 +2743,10 @@
     mDataPos = 0;
     ALOGV("initState Setting data size of %p to %zu", this, mDataSize);
     ALOGV("initState Setting data pos of %p to %zu", this, mDataPos);
-    mSession = nullptr;
-    mObjects = nullptr;
-    mObjectsSize = 0;
-    mObjectsCapacity = 0;
-    mNextObjectHint = 0;
-    mObjectsSorted = false;
-    mHasFds = false;
-    mFdsKnown = true;
+    mVariantFields.emplace<KernelFields>();
     mAllowFds = true;
     mDeallocZero = false;
     mOwner = nullptr;
-    mWorkSourceRequestHeaderPosition = 0;
-    mRequestHeaderPresent = false;
 
     // racing multiple init leads only to multiple identical write
     if (gMaxFds == 0) {
@@ -2645,9 +2762,13 @@
 }
 
 void Parcel::scanForFds() const {
-    status_t status = hasFileDescriptorsInRange(0, dataSize(), &mHasFds);
+    auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return;
+    }
+    status_t status = hasFileDescriptorsInRange(0, dataSize(), &kernelFields->mHasFds);
     ALOGE_IF(status != NO_ERROR, "Error %d calling hasFileDescriptorsInRange()", status);
-    mFdsKnown = true;
+    kernelFields->mFdsKnown = true;
 }
 
 size_t Parcel::getBlobAshmemSize() const
@@ -2660,10 +2781,15 @@
 
 size_t Parcel::getOpenAshmemSize() const
 {
+    auto* kernelFields = maybeKernelFields();
+    if (kernelFields == nullptr) {
+        return 0;
+    }
+
     size_t openAshmemSize = 0;
-    for (size_t i = 0; i < mObjectsSize; i++) {
+    for (size_t i = 0; i < kernelFields->mObjectsSize; i++) {
         const flat_binder_object* flat =
-                reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]);
+                reinterpret_cast<const flat_binder_object*>(mData + kernelFields->mObjects[i]);
 
         // cookie is compared against zero for historical reasons
         // > obj.cookie = takeOwnership ? 1 : 0;
diff --git a/libs/binder/ProcessState.cpp b/libs/binder/ProcessState.cpp
index 6beab43..7faff47 100644
--- a/libs/binder/ProcessState.cpp
+++ b/libs/binder/ProcessState.cpp
@@ -35,14 +35,15 @@
 
 #include <errno.h>
 #include <fcntl.h>
-#include <mutex>
+#include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
+#include <mutex>
 
 #define BINDER_VM_SIZE ((1 * 1024 * 1024) - sysconf(_SC_PAGE_SIZE) * 2)
 #define DEFAULT_MAX_BINDER_THREADS 15
@@ -399,7 +400,9 @@
         ALOGV("Spawning new pooled thread, name=%s\n", name.string());
         sp<Thread> t = sp<PoolThread>::make(isMain);
         t->run(name.string());
+        pthread_mutex_lock(&mThreadCountLock);
         mKernelStartedThreads++;
+        pthread_mutex_unlock(&mThreadCountLock);
     }
 }
 
diff --git a/libs/binder/RpcState.cpp b/libs/binder/RpcState.cpp
index 4ef9cd8..c6460b8 100644
--- a/libs/binder/RpcState.cpp
+++ b/libs/binder/RpcState.cpp
@@ -493,14 +493,13 @@
         }
     }
 
-    LOG_ALWAYS_FATAL_IF(std::numeric_limits<int32_t>::max() - sizeof(RpcWireHeader) -
-                                        sizeof(RpcWireTransaction) <
-                                data.dataSize(),
+    uint32_t bodySize;
+    LOG_ALWAYS_FATAL_IF(__builtin_add_overflow(sizeof(RpcWireTransaction), data.dataSize(),
+                                               &bodySize),
                         "Too much data %zu", data.dataSize());
-
     RpcWireHeader command{
             .command = RPC_COMMAND_TRANSACT,
-            .bodySize = static_cast<uint32_t>(sizeof(RpcWireTransaction) + data.dataSize()),
+            .bodySize = bodySize,
     };
 
     RpcWireTransaction transaction{
@@ -602,10 +601,8 @@
     if (rpcReply->status != OK) return rpcReply->status;
 
     data.release();
-    reply->ipcSetDataReference(rpcReply->data, command.bodySize - offsetof(RpcWireReply, data),
-                               nullptr, 0, cleanup_reply_data);
-
-    reply->markForRpc(session);
+    reply->rpcSetDataReference(session, rpcReply->data,
+                               command.bodySize - offsetof(RpcWireReply, data), cleanup_reply_data);
 
     return OK;
 }
@@ -825,11 +822,9 @@
         // transaction->data is owned by this function. Parcel borrows this data and
         // only holds onto it for the duration of this function call. Parcel will be
         // deleted before the 'transactionData' object.
-        data.ipcSetDataReference(transaction->data,
+        data.rpcSetDataReference(session, transaction->data,
                                  transactionData.size() - offsetof(RpcWireTransaction, data),
-                                 nullptr /*object*/, 0 /*objectCount*/,
                                  do_nothing_to_transact_data);
-        data.markForRpc(session);
 
         if (target) {
             bool origAllowNested = connection->allowNested;
@@ -940,14 +935,12 @@
         replyStatus = flushExcessBinderRefs(session, addr, target);
     }
 
-    LOG_ALWAYS_FATAL_IF(std::numeric_limits<int32_t>::max() - sizeof(RpcWireHeader) -
-                                        sizeof(RpcWireReply) <
-                                reply.dataSize(),
+    uint32_t bodySize;
+    LOG_ALWAYS_FATAL_IF(__builtin_add_overflow(sizeof(RpcWireReply), reply.dataSize(), &bodySize),
                         "Too much data for reply %zu", reply.dataSize());
-
     RpcWireHeader cmdReply{
             .command = RPC_COMMAND_REPLY,
-            .bodySize = static_cast<uint32_t>(sizeof(RpcWireReply) + reply.dataSize()),
+            .bodySize = bodySize,
     };
     RpcWireReply rpcReply{
             .status = replyStatus,
diff --git a/libs/binder/TEST_MAPPING b/libs/binder/TEST_MAPPING
index ebb0d27..0232f50 100644
--- a/libs/binder/TEST_MAPPING
+++ b/libs/binder/TEST_MAPPING
@@ -83,5 +83,10 @@
     {
       "name": "rustBinderSerializationTest"
     }
+  ],
+ "hwasan-presubmit": [
+    {
+      "name": "binderLibTest"
+    }
   ]
 }
diff --git a/libs/binder/include/binder/Parcel.h b/libs/binder/include/binder/Parcel.h
index e2b2c51..0345a5d 100644
--- a/libs/binder/include/binder/Parcel.h
+++ b/libs/binder/include/binder/Parcel.h
@@ -20,6 +20,7 @@
 #include <map> // for legacy reasons
 #include <string>
 #include <type_traits>
+#include <variant>
 #include <vector>
 
 #include <android-base/unique_fd.h>
@@ -76,6 +77,11 @@
     size_t              dataCapacity() const;
 
     status_t            setDataSize(size_t size);
+
+    // this must only be used to set a data position that was previously returned from
+    // dataPosition(). If writes are made, the exact same types of writes must be made (e.g.
+    // auto i = p.dataPosition(); p.writeInt32(0); p.setDataPosition(i); p.writeInt32(1);).
+    // Writing over objects, such as file descriptors and binders, is not supported.
     void                setDataPosition(size_t pos) const;
     status_t            setDataCapacity(size_t size);
 
@@ -600,15 +606,19 @@
     size_t              ipcDataSize() const;
     uintptr_t           ipcObjects() const;
     size_t              ipcObjectsCount() const;
-    void                ipcSetDataReference(const uint8_t* data, size_t dataSize,
-                                            const binder_size_t* objects, size_t objectsCount,
-                                            release_func relFunc);
+    void ipcSetDataReference(const uint8_t* data, size_t dataSize, const binder_size_t* objects,
+                             size_t objectsCount, release_func relFunc);
+    void rpcSetDataReference(const sp<RpcSession>& session, const uint8_t* data, size_t dataSize,
+                             release_func relFunc);
 
     status_t            finishWrite(size_t len);
     void                releaseObjects();
     void                acquireObjects();
     status_t            growData(size_t len);
+    // Clear the Parcel and set the capacity to `desired`.
+    // Doesn't reset the RPC session association.
     status_t            restartWrite(size_t desired);
+    // Set the capacity to `desired`, truncating the Parcel if necessary.
     status_t            continueWrite(size_t desired);
     status_t            writePointer(uintptr_t val);
     status_t            readPointer(uintptr_t *pArg) const;
@@ -1247,19 +1257,40 @@
     uint8_t*            mData;
     size_t              mDataSize;
     size_t              mDataCapacity;
-    mutable size_t      mDataPos;
-    binder_size_t*      mObjects;
-    size_t              mObjectsSize;
-    size_t              mObjectsCapacity;
-    mutable size_t      mNextObjectHint;
-    mutable bool        mObjectsSorted;
+    mutable size_t mDataPos;
 
-    mutable bool        mRequestHeaderPresent;
+    // Fields only needed when parcelling for "kernel Binder".
+    struct KernelFields {
+        binder_size_t* mObjects = nullptr;
+        size_t mObjectsSize = 0;
+        size_t mObjectsCapacity = 0;
+        mutable size_t mNextObjectHint = 0;
 
-    mutable size_t      mWorkSourceRequestHeaderPosition;
+        mutable size_t mWorkSourceRequestHeaderPosition = 0;
+        mutable bool mRequestHeaderPresent = false;
 
-    mutable bool        mFdsKnown;
-    mutable bool        mHasFds;
+        mutable bool mObjectsSorted = false;
+        mutable bool mFdsKnown = true;
+        mutable bool mHasFds = false;
+    };
+    // Fields only needed when parcelling for RPC Binder.
+    struct RpcFields {
+        RpcFields(const sp<RpcSession>& session);
+
+        // Should always be non-null.
+        const sp<RpcSession> mSession;
+    };
+    std::variant<KernelFields, RpcFields> mVariantFields;
+
+    // Pointer to KernelFields in mVariantFields if present.
+    KernelFields* maybeKernelFields() { return std::get_if<KernelFields>(&mVariantFields); }
+    const KernelFields* maybeKernelFields() const {
+        return std::get_if<KernelFields>(&mVariantFields);
+    }
+    // Pointer to RpcFields in mVariantFields if present.
+    RpcFields* maybeRpcFields() { return std::get_if<RpcFields>(&mVariantFields); }
+    const RpcFields* maybeRpcFields() const { return std::get_if<RpcFields>(&mVariantFields); }
+
     bool                mAllowFds;
 
     // if this parcelable is involved in a secure transaction, force the
@@ -1268,7 +1299,6 @@
 
     release_func        mOwner;
 
-    sp<RpcSession> mSession;
     size_t mReserved;
 
     class Blob {
diff --git a/libs/binder/ndk/include_ndk/android/binder_parcel.h b/libs/binder/ndk/include_ndk/android/binder_parcel.h
index 8457581..f68612c 100644
--- a/libs/binder/ndk/include_ndk/android/binder_parcel.h
+++ b/libs/binder/ndk/include_ndk/android/binder_parcel.h
@@ -59,6 +59,11 @@
 /**
  * Sets the position within the parcel.
  *
+ * This must be called with a position that has been previously returned from
+ * AParcel_getDataPosition. If writes are made after setting the data position, they must
+ * be made in the exact same sequence used before resetting data position. Writing over
+ * objects such as binders or file descriptors is not supported.
+ *
  * Available since API level 29.
  *
  * \param parcel The parcel of which to set the position.
diff --git a/libs/binder/ndk/include_platform/android/binder_stability.h b/libs/binder/ndk/include_platform/android/binder_stability.h
index d0cd11f..683a433 100644
--- a/libs/binder/ndk/include_platform/android/binder_stability.h
+++ b/libs/binder/ndk/include_platform/android/binder_stability.h
@@ -98,9 +98,9 @@
  * This interface has system<->vendor stability
  */
 // b/227835797 - can't use __INTRODUCED_IN(30) because old targets load this code
-#if __ANDROID_MIN_SDK_VERSION__ < 30
+#if defined(__ANDROID_MIN_SDK_VERSION__) && __ANDROID_MIN_SDK_VERSION__ < 30
 __attribute__((weak))
-#endif  // __ANDROID_MIN_SDK_VERSION__ < 30
+#endif  // defined(__ANDROID_MIN_SDK_VERSION__) && __ANDROID_MIN_SDK_VERSION__ < 30
 void AIBinder_markVintfStability(AIBinder* binder);
 
 __END_DECLS
diff --git a/libs/binder/tests/Android.bp b/libs/binder/tests/Android.bp
index a3533d8..2f96d0e 100644
--- a/libs/binder/tests/Android.bp
+++ b/libs/binder/tests/Android.bp
@@ -319,7 +319,6 @@
         "libbinder",
         "libutils",
     ],
-    clang: true,
     cflags: [
         "-g",
         "-Wno-missing-field-initializers",
diff --git a/libs/binder/tests/binderAllocationLimits.cpp b/libs/binder/tests/binderAllocationLimits.cpp
index e1f5ed5..b14ec55 100644
--- a/libs/binder/tests/binderAllocationLimits.cpp
+++ b/libs/binder/tests/binderAllocationLimits.cpp
@@ -15,8 +15,11 @@
  */
 
 #include <android-base/logging.h>
-#include <binder/Parcel.h>
+#include <binder/Binder.h>
 #include <binder/IServiceManager.h>
+#include <binder/Parcel.h>
+#include <binder/RpcServer.h>
+#include <binder/RpcSession.h>
 #include <gtest/gtest.h>
 #include <utils/CallStack.h>
 
@@ -124,12 +127,18 @@
     });
 }
 
-using android::IBinder;
-using android::Parcel;
-using android::String16;
+using android::BBinder;
 using android::defaultServiceManager;
-using android::sp;
+using android::IBinder;
 using android::IServiceManager;
+using android::OK;
+using android::Parcel;
+using android::RpcServer;
+using android::RpcSession;
+using android::sp;
+using android::status_t;
+using android::statusToString;
+using android::String16;
 
 static sp<IBinder> GetRemoteBinder() {
     // This gets binder representing the service manager
@@ -175,6 +184,34 @@
     EXPECT_EQ(mallocs, 1);
 }
 
+TEST(RpcBinderAllocation, SetupRpcServer) {
+    std::string tmp = getenv("TMPDIR") ?: "/tmp";
+    std::string addr = tmp + "/binderRpcBenchmark";
+    (void)unlink(addr.c_str());
+    auto server = RpcServer::make();
+    server->setRootObject(sp<BBinder>::make());
+
+    CHECK_EQ(OK, server->setupUnixDomainServer(addr.c_str()));
+
+    std::thread([server]() { server->join(); }).detach();
+
+    status_t status;
+    auto session = RpcSession::make();
+    status = session->setupUnixDomainClient(addr.c_str());
+    CHECK_EQ(status, OK) << "Could not connect: " << addr << ": " << statusToString(status).c_str();
+
+    auto remoteBinder = session->getRootObject();
+
+    size_t mallocs = 0, totalBytes = 0;
+    const auto on_malloc = OnMalloc([&](size_t bytes) {
+        mallocs++;
+        totalBytes += bytes;
+    });
+    CHECK_EQ(OK, remoteBinder->pingBinder());
+    EXPECT_EQ(mallocs, 4);
+    EXPECT_EQ(totalBytes, 108);
+}
+
 int main(int argc, char** argv) {
     if (getenv("LIBC_HOOKS_ENABLE") == nullptr) {
         CHECK(0 == setenv("LIBC_HOOKS_ENABLE", "1", true /*overwrite*/));
diff --git a/libs/binder/tests/binderLibTest.cpp b/libs/binder/tests/binderLibTest.cpp
index 18a9f86..3e90726 100644
--- a/libs/binder/tests/binderLibTest.cpp
+++ b/libs/binder/tests/binderLibTest.cpp
@@ -1280,7 +1280,7 @@
                 StatusEq(NO_ERROR));
     replyi = reply.readInt32();
     // No more than 16 threads should exist.
-    EXPECT_EQ(replyi, kKernelThreads + 1);
+    EXPECT_TRUE(replyi == kKernelThreads || replyi == kKernelThreads + 1);
 }
 
 size_t epochMillis() {
@@ -1726,11 +1726,11 @@
                 return NO_ERROR;
             }
             case BINDER_LIB_TEST_PROCESS_LOCK: {
-                blockMutex.lock();
+                m_blockMutex.lock();
                 return NO_ERROR;
             }
             case BINDER_LIB_TEST_LOCK_UNLOCK: {
-                std::lock_guard<std::mutex> _l(blockMutex);
+                std::lock_guard<std::mutex> _l(m_blockMutex);
                 return NO_ERROR;
             }
             case BINDER_LIB_TEST_UNLOCK_AFTER_MS: {
@@ -1738,10 +1738,11 @@
                 return unlockInMs(ms);
             }
             case BINDER_LIB_TEST_PROCESS_TEMPORARY_LOCK: {
-                blockMutex.lock();
-                std::thread t([&] {
-                    unlockInMs(data.readInt32());
-                }); // start local thread to unlock in 1s
+                m_blockMutex.lock();
+                sp<BinderLibTestService> thisService = this;
+                int32_t value = data.readInt32();
+                // start local thread to unlock in 1s
+                std::thread t([=] { thisService->unlockInMs(value); });
                 t.detach();
                 return NO_ERROR;
             }
@@ -1752,7 +1753,7 @@
 
     status_t unlockInMs(int32_t ms) {
         usleep(ms * 1000);
-        blockMutex.unlock();
+        m_blockMutex.unlock();
         return NO_ERROR;
     }
 
@@ -1766,7 +1767,7 @@
     sp<IBinder> m_strongRef;
     sp<IBinder> m_callback;
     bool m_exitOnDestroy;
-    std::mutex blockMutex;
+    std::mutex m_blockMutex;
 };
 
 int run_server(int index, int readypipefd, bool usePoll)
diff --git a/libs/binder/tests/parcel_fuzzer/binder_ndk.h b/libs/binder/tests/parcel_fuzzer/binder_ndk.h
index cf24ab9..81e79b5 100644
--- a/libs/binder/tests/parcel_fuzzer/binder_ndk.h
+++ b/libs/binder/tests/parcel_fuzzer/binder_ndk.h
@@ -43,6 +43,10 @@
         return aParcel()->get()->setData(buffer, len);
     }
 
+    android::status_t appendFrom(const NdkParcelAdapter* parcel, int32_t start, int32_t len) {
+        return AParcel_appendFrom(parcel->aParcel(), aParcel(), start, len);
+    }
+
 private:
     ndk::ScopedAParcel mParcel;
 };
diff --git a/libs/binder/tests/parcel_fuzzer/main.cpp b/libs/binder/tests/parcel_fuzzer/main.cpp
index 70c32cb..180a177 100644
--- a/libs/binder/tests/parcel_fuzzer/main.cpp
+++ b/libs/binder/tests/parcel_fuzzer/main.cpp
@@ -94,6 +94,25 @@
     }
 }
 
+// Append two random parcels.
+template <typename P>
+void doAppendFuzz(const char* backend, FuzzedDataProvider&& provider) {
+    int32_t start = provider.ConsumeIntegral<int32_t>();
+    int32_t len = provider.ConsumeIntegral<int32_t>();
+
+    std::vector<uint8_t> bytes = provider.ConsumeBytes<uint8_t>(
+            provider.ConsumeIntegralInRange<size_t>(0, provider.remaining_bytes()));
+
+    P p0, p1;
+    fillRandomParcel(&p0, FuzzedDataProvider(bytes.data(), bytes.size()));
+    fillRandomParcel(&p1, std::move(provider));
+
+    FUZZ_LOG() << "backend: " << backend;
+    FUZZ_LOG() << "start: " << start << " len: " << len;
+
+    p0.appendFrom(&p1, start, len);
+}
+
 void* NothingClass_onCreate(void* args) {
     return args;
 }
@@ -143,6 +162,12 @@
                 doReadFuzz<NdkParcelAdapter>("binder_ndk", BINDER_NDK_PARCEL_READ_FUNCTIONS,
                                              std::move(provider));
             },
+            [](FuzzedDataProvider&& provider) {
+                doAppendFuzz<::android::Parcel>("binder", std::move(provider));
+            },
+            [](FuzzedDataProvider&& provider) {
+                doAppendFuzz<NdkParcelAdapter>("binder_ndk", std::move(provider));
+            },
     };
 
     provider.PickValueInArray(fuzzBackend)(std::move(provider));
diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index 648bcc3..9086f1c 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -334,7 +334,6 @@
 cc_defaults {
     name: "libgui_bufferqueue-defaults",
 
-    clang: true,
     cflags: [
         "-Wall",
         "-Werror",
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index cc23074..501fdae 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -2238,6 +2238,10 @@
             size_t count = std::max<size_t>(kMaxPnpIdSize, dpi->manufacturerPnpId.size());
             std::copy_n(dpi->manufacturerPnpId.begin(), count, info.manufacturerPnpId.begin());
         }
+        if (dpi->relativeAddress.size() > 0) {
+            std::copy(dpi->relativeAddress.begin(), dpi->relativeAddress.end(),
+                      std::back_inserter(info.relativeAddress));
+        }
         info.productId = dpi->productId;
         if (date.getTag() == Tag::modelYear) {
             DeviceProductInfo::ModelYear modelYear;
diff --git a/libs/gui/WindowInfo.cpp b/libs/gui/WindowInfo.cpp
index 4e966d1..804ce4f 100644
--- a/libs/gui/WindowInfo.cpp
+++ b/libs/gui/WindowInfo.cpp
@@ -76,7 +76,7 @@
             info.inputConfig == inputConfig && info.displayId == displayId &&
             info.replaceTouchableRegionWithCrop == replaceTouchableRegionWithCrop &&
             info.applicationInfo == applicationInfo && info.layoutParamsType == layoutParamsType &&
-            info.layoutParamsFlags == layoutParamsFlags && info.isClone == isClone;
+            info.layoutParamsFlags == layoutParamsFlags;
 }
 
 status_t WindowInfo::writeToParcel(android::Parcel* parcel) const {
@@ -124,8 +124,7 @@
         parcel->write(touchableRegion) ?:
         parcel->writeBool(replaceTouchableRegionWithCrop) ?:
         parcel->writeStrongBinder(touchableRegionCropHandle.promote()) ?:
-        parcel->writeStrongBinder(windowToken) ?:
-        parcel->writeBool(isClone);
+        parcel->writeStrongBinder(windowToken);
     // clang-format on
     return status;
 }
@@ -176,8 +175,7 @@
         parcel->read(touchableRegion) ?:
         parcel->readBool(&replaceTouchableRegionWithCrop) ?:
         parcel->readNullableStrongBinder(&touchableRegionCropHandleSp) ?:
-        parcel->readNullableStrongBinder(&windowToken) ?:
-        parcel->readBool(&isClone);
+        parcel->readNullableStrongBinder(&windowToken);
     // clang-format on
 
     if (status != OK) {
diff --git a/libs/gui/aidl/android/gui/ISurfaceComposer.aidl b/libs/gui/aidl/android/gui/ISurfaceComposer.aidl
index 39833fe..730d758 100644
--- a/libs/gui/aidl/android/gui/ISurfaceComposer.aidl
+++ b/libs/gui/aidl/android/gui/ISurfaceComposer.aidl
@@ -118,7 +118,7 @@
      * Returns display statistics for a given display
      * intended to be used by the media framework to properly schedule
      * video frames */
-    DisplayStatInfo getDisplayStats(IBinder display);
+    DisplayStatInfo getDisplayStats(@nullable IBinder display);
 
     /**
      * Get transactional state of given display.
diff --git a/libs/gui/include/gui/WindowInfo.h b/libs/gui/include/gui/WindowInfo.h
index 169f7f0..ac74c8a 100644
--- a/libs/gui/include/gui/WindowInfo.h
+++ b/libs/gui/include/gui/WindowInfo.h
@@ -171,6 +171,8 @@
                 static_cast<uint32_t>(os::InputConfig::SPY),
         INTERCEPTS_STYLUS =
                 static_cast<uint32_t>(os::InputConfig::INTERCEPTS_STYLUS),
+        CLONE =
+                static_cast<uint32_t>(os::InputConfig::CLONE),
         // clang-format on
     };
 
@@ -236,8 +238,6 @@
 
     void setInputConfig(ftl::Flags<InputConfig> config, bool value);
 
-    bool isClone = false;
-
     void addTouchableRegion(const Rect& region);
 
     bool touchableRegionContainsPoint(int32_t x, int32_t y) const;
diff --git a/libs/gui/tests/Android.bp b/libs/gui/tests/Android.bp
index e58543a..fc68ad2 100644
--- a/libs/gui/tests/Android.bp
+++ b/libs/gui/tests/Android.bp
@@ -15,7 +15,6 @@
     name: "libgui_test",
     test_suites: ["device-tests"],
 
-    clang: true,
     cflags: [
         "-Wall",
         "-Werror",
@@ -75,7 +74,6 @@
     name: "libgui_multilib_test",
     test_suites: ["device-tests"],
 
-    clang: true,
     cflags: [
         "-Wall",
         "-Werror",
@@ -102,7 +100,6 @@
     name: "SurfaceParcelable_test",
     test_suites: ["device-tests"],
 
-    clang: true,
     cflags: [
         "-Wall",
         "-Werror",
@@ -131,7 +128,6 @@
 cc_test {
     name: "SamplingDemo",
 
-    clang: true,
     cflags: [
         "-Wall",
         "-Werror",
diff --git a/libs/gui/tests/WindowInfo_test.cpp b/libs/gui/tests/WindowInfo_test.cpp
index 99658cc..c51b244 100644
--- a/libs/gui/tests/WindowInfo_test.cpp
+++ b/libs/gui/tests/WindowInfo_test.cpp
@@ -71,7 +71,6 @@
     i.applicationInfo.name = "ApplicationFooBar";
     i.applicationInfo.token = new BBinder();
     i.applicationInfo.dispatchingTimeoutMillis = 0x12345678ABCD;
-    i.isClone = true;
 
     Parcel p;
     i.writeToParcel(&p);
@@ -102,7 +101,6 @@
     ASSERT_EQ(i.replaceTouchableRegionWithCrop, i2.replaceTouchableRegionWithCrop);
     ASSERT_EQ(i.touchableRegionCropHandle, i2.touchableRegionCropHandle);
     ASSERT_EQ(i.applicationInfo, i2.applicationInfo);
-    ASSERT_EQ(i.isClone, i2.isClone);
 }
 
 TEST(InputApplicationInfo, Parcelling) {
diff --git a/libs/input/Android.bp b/libs/input/Android.bp
index 4a3c253..5030d60 100644
--- a/libs/input/Android.bp
+++ b/libs/input/Android.bp
@@ -57,8 +57,6 @@
         "VirtualKeyMap.cpp",
     ],
 
-    clang: true,
-
     header_libs: ["jni_headers"],
     export_header_lib_headers: ["jni_headers"],
 
@@ -66,6 +64,7 @@
         "libbase",
         "liblog",
         "libcutils",
+        "libvintf",
     ],
 
     static_libs: [
diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp
index fe1754c..13ca9ec 100644
--- a/libs/input/Input.cpp
+++ b/libs/input/Input.cpp
@@ -22,7 +22,9 @@
 #include <inttypes.h>
 #include <string.h>
 
+#include <android-base/logging.h>
 #include <android-base/stringprintf.h>
+#include <cutils/compiler.h>
 #include <gui/constants.h>
 #include <input/DisplayViewport.h>
 #include <input/Input.h>
@@ -542,7 +544,14 @@
 }
 
 const PointerCoords* MotionEvent::getRawPointerCoords(size_t pointerIndex) const {
-    return &mSamplePointerCoords[getHistorySize() * getPointerCount() + pointerIndex];
+    if (CC_UNLIKELY(pointerIndex < 0 || pointerIndex >= getPointerCount())) {
+        LOG(FATAL) << __func__ << ": Invalid pointer index " << pointerIndex << " for " << *this;
+    }
+    const size_t position = getHistorySize() * getPointerCount() + pointerIndex;
+    if (CC_UNLIKELY(position < 0 || position >= mSamplePointerCoords.size())) {
+        LOG(FATAL) << __func__ << ": Invalid array index " << position << " for " << *this;
+    }
+    return &mSamplePointerCoords[position];
 }
 
 float MotionEvent::getRawAxisValue(int32_t axis, size_t pointerIndex) const {
@@ -555,7 +564,18 @@
 
 const PointerCoords* MotionEvent::getHistoricalRawPointerCoords(
         size_t pointerIndex, size_t historicalIndex) const {
-    return &mSamplePointerCoords[historicalIndex * getPointerCount() + pointerIndex];
+    if (CC_UNLIKELY(pointerIndex < 0 || pointerIndex >= getPointerCount())) {
+        LOG(FATAL) << __func__ << ": Invalid pointer index " << pointerIndex << " for " << *this;
+    }
+    if (CC_UNLIKELY(historicalIndex < 0 || historicalIndex > getHistorySize())) {
+        LOG(FATAL) << __func__ << ": Invalid historical index " << historicalIndex << " for "
+                   << *this;
+    }
+    const size_t position = historicalIndex * getPointerCount() + pointerIndex;
+    if (CC_UNLIKELY(position < 0 || position >= mSamplePointerCoords.size())) {
+        LOG(FATAL) << __func__ << ": Invalid array index " << position << " for " << *this;
+    }
+    return &mSamplePointerCoords[position];
 }
 
 float MotionEvent::getHistoricalRawAxisValue(int32_t axis, size_t pointerIndex,
@@ -903,6 +923,53 @@
     return out;
 }
 
+std::ostream& operator<<(std::ostream& out, const MotionEvent& event) {
+    out << "MotionEvent { action=" << MotionEvent::actionToString(event.getAction());
+    if (event.getActionButton() != 0) {
+        out << ", actionButton=" << std::to_string(event.getActionButton());
+    }
+    const size_t pointerCount = event.getPointerCount();
+    for (size_t i = 0; i < pointerCount; i++) {
+        out << ", id[" << i << "]=" << event.getPointerId(i);
+        float x = event.getX(i);
+        float y = event.getY(i);
+        if (x != 0 || y != 0) {
+            out << ", x[" << i << "]=" << x;
+            out << ", y[" << i << "]=" << y;
+        }
+        int toolType = event.getToolType(i);
+        if (toolType != AMOTION_EVENT_TOOL_TYPE_FINGER) {
+            out << ", toolType[" << i << "]=" << toolType;
+        }
+    }
+    if (event.getButtonState() != 0) {
+        out << ", buttonState=" << event.getButtonState();
+    }
+    if (event.getClassification() != MotionClassification::NONE) {
+        out << ", classification=" << motionClassificationToString(event.getClassification());
+    }
+    if (event.getMetaState() != 0) {
+        out << ", metaState=" << event.getMetaState();
+    }
+    if (event.getEdgeFlags() != 0) {
+        out << ", edgeFlags=" << event.getEdgeFlags();
+    }
+    if (pointerCount != 1) {
+        out << ", pointerCount=" << pointerCount;
+    }
+    if (event.getHistorySize() != 0) {
+        out << ", historySize=" << event.getHistorySize();
+    }
+    out << ", eventTime=" << event.getEventTime();
+    out << ", downTime=" << event.getDownTime();
+    out << ", deviceId=" << event.getDeviceId();
+    out << ", source=" << inputEventSourceToString(event.getSource());
+    out << ", displayId=" << event.getDisplayId();
+    out << ", eventId=" << event.getId();
+    out << "}";
+    return out;
+}
+
 // --- FocusEvent ---
 
 void FocusEvent::initialize(int32_t id, bool hasFocus) {
diff --git a/libs/input/InputDevice.cpp b/libs/input/InputDevice.cpp
index 0bee1b6..a908969 100644
--- a/libs/input/InputDevice.cpp
+++ b/libs/input/InputDevice.cpp
@@ -53,33 +53,39 @@
 }
 
 std::string getInputDeviceConfigurationFilePathByDeviceIdentifier(
-        const InputDeviceIdentifier& deviceIdentifier,
-        InputDeviceConfigurationFileType type) {
+        const InputDeviceIdentifier& deviceIdentifier, InputDeviceConfigurationFileType type,
+        const char* suffix) {
     if (deviceIdentifier.vendor !=0 && deviceIdentifier.product != 0) {
         if (deviceIdentifier.version != 0) {
             // Try vendor product version.
-            std::string versionPath = getInputDeviceConfigurationFilePathByName(
-                    StringPrintf("Vendor_%04x_Product_%04x_Version_%04x",
-                            deviceIdentifier.vendor, deviceIdentifier.product,
-                            deviceIdentifier.version),
-                    type);
+            std::string versionPath =
+                    getInputDeviceConfigurationFilePathByName(StringPrintf("Vendor_%04x_Product_%"
+                                                                           "04x_Version_%04x%s",
+                                                                           deviceIdentifier.vendor,
+                                                                           deviceIdentifier.product,
+                                                                           deviceIdentifier.version,
+                                                                           suffix),
+                                                              type);
             if (!versionPath.empty()) {
                 return versionPath;
             }
         }
 
         // Try vendor product.
-        std::string productPath = getInputDeviceConfigurationFilePathByName(
-                StringPrintf("Vendor_%04x_Product_%04x",
-                        deviceIdentifier.vendor, deviceIdentifier.product),
-                type);
+        std::string productPath =
+                getInputDeviceConfigurationFilePathByName(StringPrintf("Vendor_%04x_Product_%04x%s",
+                                                                       deviceIdentifier.vendor,
+                                                                       deviceIdentifier.product,
+                                                                       suffix),
+                                                          type);
         if (!productPath.empty()) {
             return productPath;
         }
     }
 
     // Try device name.
-    return getInputDeviceConfigurationFilePathByName(deviceIdentifier.getCanonicalName(), type);
+    return getInputDeviceConfigurationFilePathByName(deviceIdentifier.getCanonicalName() + suffix,
+                                                     type);
 }
 
 std::string getInputDeviceConfigurationFilePathByName(
diff --git a/libs/input/KeyLayoutMap.cpp b/libs/input/KeyLayoutMap.cpp
index 17c3bb3..59cc7d1 100644
--- a/libs/input/KeyLayoutMap.cpp
+++ b/libs/input/KeyLayoutMap.cpp
@@ -25,6 +25,8 @@
 #include <utils/Errors.h>
 #include <utils/Timers.h>
 #include <utils/Tokenizer.h>
+#include <vintf/RuntimeInfo.h>
+#include <vintf/VintfObject.h>
 
 #include <cstdlib>
 #include <string_view>
@@ -76,6 +78,29 @@
          sensorPair<InputDeviceSensorType::GYROSCOPE_UNCALIBRATED>(),
          sensorPair<InputDeviceSensorType::SIGNIFICANT_MOTION>()};
 
+bool kernelConfigsArePresent(const std::set<std::string>& configs) {
+    std::shared_ptr<const android::vintf::RuntimeInfo> runtimeInfo =
+            android::vintf::VintfObject::GetInstance()->getRuntimeInfo(
+                    vintf::RuntimeInfo::FetchFlag::CONFIG_GZ);
+    LOG_ALWAYS_FATAL_IF(runtimeInfo == nullptr, "Kernel configs could not be fetched");
+
+    const std::map<std::string, std::string>& kernelConfigs = runtimeInfo->kernelConfigs();
+    for (const std::string& requiredConfig : configs) {
+        const auto configIt = kernelConfigs.find(requiredConfig);
+        if (configIt == kernelConfigs.end()) {
+            ALOGI("Required kernel config %s is not found", requiredConfig.c_str());
+            return false;
+        }
+        const std::string& option = configIt->second;
+        if (option != "y" && option != "m") {
+            ALOGI("Required kernel config %s has option %s", requiredConfig.c_str(),
+                  option.c_str());
+            return false;
+        }
+    }
+    return true;
+}
+
 } // namespace
 
 KeyLayoutMap::KeyLayoutMap() = default;
@@ -83,32 +108,34 @@
 
 base::Result<std::shared_ptr<KeyLayoutMap>> KeyLayoutMap::loadContents(const std::string& filename,
                                                                        const char* contents) {
-    Tokenizer* tokenizer;
-    status_t status = Tokenizer::fromContents(String8(filename.c_str()), contents, &tokenizer);
-    if (status) {
-        ALOGE("Error %d opening key layout map.", status);
-        return Errorf("Error {} opening key layout map file {}.", status, filename.c_str());
-    }
-    std::unique_ptr<Tokenizer> t(tokenizer);
-    auto ret = load(t.get());
-    if (ret.ok()) {
-        (*ret)->mLoadFileName = filename;
-    }
-    return ret;
+    return load(filename, contents);
 }
 
-base::Result<std::shared_ptr<KeyLayoutMap>> KeyLayoutMap::load(const std::string& filename) {
+base::Result<std::shared_ptr<KeyLayoutMap>> KeyLayoutMap::load(const std::string& filename,
+                                                               const char* contents) {
     Tokenizer* tokenizer;
-    status_t status = Tokenizer::open(String8(filename.c_str()), &tokenizer);
+    status_t status;
+    if (contents == nullptr) {
+        status = Tokenizer::open(String8(filename.c_str()), &tokenizer);
+    } else {
+        status = Tokenizer::fromContents(String8(filename.c_str()), contents, &tokenizer);
+    }
     if (status) {
         ALOGE("Error %d opening key layout map file %s.", status, filename.c_str());
         return Errorf("Error {} opening key layout map file {}.", status, filename.c_str());
     }
     std::unique_ptr<Tokenizer> t(tokenizer);
     auto ret = load(t.get());
-    if (ret.ok()) {
-        (*ret)->mLoadFileName = filename;
+    if (!ret.ok()) {
+        return ret;
     }
+    const std::shared_ptr<KeyLayoutMap>& map = *ret;
+    LOG_ALWAYS_FATAL_IF(map == nullptr, "Returned map should not be null if there's no error");
+    if (!kernelConfigsArePresent(map->mRequiredKernelConfigs)) {
+        ALOGI("Not loading %s because the required kernel configs are not set", filename.c_str());
+        return Errorf("Missing kernel config");
+    }
+    map->mLoadFileName = filename;
     return ret;
 }
 
@@ -172,77 +199,67 @@
 
 const KeyLayoutMap::Key* KeyLayoutMap::getKey(int32_t scanCode, int32_t usageCode) const {
     if (usageCode) {
-        ssize_t index = mKeysByUsageCode.indexOfKey(usageCode);
-        if (index >= 0) {
-            return &mKeysByUsageCode.valueAt(index);
+        auto it = mKeysByUsageCode.find(usageCode);
+        if (it != mKeysByUsageCode.end()) {
+            return &it->second;
         }
     }
     if (scanCode) {
-        ssize_t index = mKeysByScanCode.indexOfKey(scanCode);
-        if (index >= 0) {
-            return &mKeysByScanCode.valueAt(index);
+        auto it = mKeysByScanCode.find(scanCode);
+        if (it != mKeysByScanCode.end()) {
+            return &it->second;
         }
     }
     return nullptr;
 }
 
-status_t KeyLayoutMap::findScanCodesForKey(
-        int32_t keyCode, std::vector<int32_t>* outScanCodes) const {
-    const size_t N = mKeysByScanCode.size();
-    for (size_t i=0; i<N; i++) {
-        if (mKeysByScanCode.valueAt(i).keyCode == keyCode) {
-            outScanCodes->push_back(mKeysByScanCode.keyAt(i));
+std::vector<int32_t> KeyLayoutMap::findScanCodesForKey(int32_t keyCode) const {
+    std::vector<int32_t> scanCodes;
+    for (const auto& [scanCode, key] : mKeysByScanCode) {
+        if (keyCode == key.keyCode) {
+            scanCodes.push_back(scanCode);
         }
     }
-    return NO_ERROR;
+    return scanCodes;
 }
 
-status_t KeyLayoutMap::mapAxis(int32_t scanCode, AxisInfo* outAxisInfo) const {
-    ssize_t index = mAxes.indexOfKey(scanCode);
-    if (index < 0) {
+std::optional<AxisInfo> KeyLayoutMap::mapAxis(int32_t scanCode) const {
+    auto it = mAxes.find(scanCode);
+    if (it == mAxes.end()) {
         ALOGD_IF(DEBUG_MAPPING, "mapAxis: scanCode=%d ~ Failed.", scanCode);
-        return NAME_NOT_FOUND;
+        return std::nullopt;
     }
 
-    *outAxisInfo = mAxes.valueAt(index);
-
+    const AxisInfo& axisInfo = it->second;
     ALOGD_IF(DEBUG_MAPPING,
              "mapAxis: scanCode=%d ~ Result mode=%d, axis=%d, highAxis=%d, "
              "splitValue=%d, flatOverride=%d.",
-             scanCode, outAxisInfo->mode, outAxisInfo->axis, outAxisInfo->highAxis,
-             outAxisInfo->splitValue, outAxisInfo->flatOverride);
-
-    return NO_ERROR;
+             scanCode, axisInfo.mode, axisInfo.axis, axisInfo.highAxis, axisInfo.splitValue,
+             axisInfo.flatOverride);
+    return axisInfo;
 }
 
-status_t KeyLayoutMap::findScanCodeForLed(int32_t ledCode, int32_t* outScanCode) const {
-    const size_t N = mLedsByScanCode.size();
-    for (size_t i = 0; i < N; i++) {
-        if (mLedsByScanCode.valueAt(i).ledCode == ledCode) {
-            *outScanCode = mLedsByScanCode.keyAt(i);
-            ALOGD_IF(DEBUG_MAPPING, "findScanCodeForLed: ledCode=%d, scanCode=%d.", ledCode,
-                     *outScanCode);
-            return NO_ERROR;
-        }
-    }
-    ALOGD_IF(DEBUG_MAPPING, "findScanCodeForLed: ledCode=%d ~ Not found.", ledCode);
-    return NAME_NOT_FOUND;
-}
-
-status_t KeyLayoutMap::findUsageCodeForLed(int32_t ledCode, int32_t* outUsageCode) const {
-    const size_t N = mLedsByUsageCode.size();
-    for (size_t i = 0; i < N; i++) {
-        if (mLedsByUsageCode.valueAt(i).ledCode == ledCode) {
-            *outUsageCode = mLedsByUsageCode.keyAt(i);
-            ALOGD_IF(DEBUG_MAPPING, "%s: ledCode=%d, usage=%x.", __func__, ledCode, *outUsageCode);
-            return NO_ERROR;
+std::optional<int32_t> KeyLayoutMap::findScanCodeForLed(int32_t ledCode) const {
+    for (const auto& [scanCode, led] : mLedsByScanCode) {
+        if (led.ledCode == ledCode) {
+            ALOGD_IF(DEBUG_MAPPING, "%s: ledCode=%d, scanCode=%d.", __func__, ledCode, scanCode);
+            return scanCode;
         }
     }
     ALOGD_IF(DEBUG_MAPPING, "%s: ledCode=%d ~ Not found.", __func__, ledCode);
-
-    return NAME_NOT_FOUND;
+    return std::nullopt;
 }
 
+std::optional<int32_t> KeyLayoutMap::findUsageCodeForLed(int32_t ledCode) const {
+    for (const auto& [usageCode, led] : mLedsByUsageCode) {
+        if (led.ledCode == ledCode) {
+            ALOGD_IF(DEBUG_MAPPING, "%s: ledCode=%d, usage=%x.", __func__, ledCode, usageCode);
+            return usageCode;
+        }
+    }
+    ALOGD_IF(DEBUG_MAPPING, "%s: ledCode=%d ~ Not found.", __func__, ledCode);
+    return std::nullopt;
+}
 
 // --- KeyLayoutMap::Parser ---
 
@@ -278,6 +295,10 @@
                 mTokenizer->skipDelimiters(WHITESPACE);
                 status_t status = parseSensor();
                 if (status) return status;
+            } else if (keywordToken == "requires_kernel_config") {
+                mTokenizer->skipDelimiters(WHITESPACE);
+                status_t status = parseRequiredKernelConfig();
+                if (status) return status;
             } else {
                 ALOGE("%s: Expected keyword, got '%s'.", mTokenizer->getLocation().string(),
                         keywordToken.string());
@@ -314,8 +335,9 @@
                 mapUsage ? "usage" : "scan code", codeToken.string());
         return BAD_VALUE;
     }
-    KeyedVector<int32_t, Key>& map = mapUsage ? mMap->mKeysByUsageCode : mMap->mKeysByScanCode;
-    if (map.indexOfKey(code) >= 0) {
+    std::unordered_map<int32_t, Key>& map =
+            mapUsage ? mMap->mKeysByUsageCode : mMap->mKeysByScanCode;
+    if (map.find(code) != map.end()) {
         ALOGE("%s: Duplicate entry for key %s '%s'.", mTokenizer->getLocation().string(),
                 mapUsage ? "usage" : "scan code", codeToken.string());
         return BAD_VALUE;
@@ -356,7 +378,7 @@
     Key key;
     key.keyCode = keyCode;
     key.flags = flags;
-    map.add(code, key);
+    map.insert({code, key});
     return NO_ERROR;
 }
 
@@ -369,7 +391,7 @@
                 scanCodeToken.string());
         return BAD_VALUE;
     }
-    if (mMap->mAxes.indexOfKey(scanCode) >= 0) {
+    if (mMap->mAxes.find(scanCode) != mMap->mAxes.end()) {
         ALOGE("%s: Duplicate entry for axis scan code '%s'.", mTokenizer->getLocation().string(),
                 scanCodeToken.string());
         return BAD_VALUE;
@@ -455,8 +477,7 @@
              "splitValue=%d, flatOverride=%d.",
              scanCode, axisInfo.mode, axisInfo.axis, axisInfo.highAxis, axisInfo.splitValue,
              axisInfo.flatOverride);
-
-    mMap->mAxes.add(scanCode, axisInfo);
+    mMap->mAxes.insert({scanCode, axisInfo});
     return NO_ERROR;
 }
 
@@ -476,8 +497,9 @@
         return BAD_VALUE;
     }
 
-    KeyedVector<int32_t, Led>& map = mapUsage ? mMap->mLedsByUsageCode : mMap->mLedsByScanCode;
-    if (map.indexOfKey(code) >= 0) {
+    std::unordered_map<int32_t, Led>& map =
+            mapUsage ? mMap->mLedsByUsageCode : mMap->mLedsByScanCode;
+    if (map.find(code) != map.end()) {
         ALOGE("%s: Duplicate entry for led %s '%s'.", mTokenizer->getLocation().string(),
                 mapUsage ? "usage" : "scan code", codeToken.string());
         return BAD_VALUE;
@@ -497,7 +519,7 @@
 
     Led led;
     led.ledCode = ledCode;
-    map.add(code, led);
+    map.insert({code, led});
     return NO_ERROR;
 }
 
@@ -579,4 +601,23 @@
     return NO_ERROR;
 }
 
+// Parse the name of a required kernel config.
+// The layout won't be used if the specified kernel config is not present
+// Examples:
+// requires_kernel_config CONFIG_HID_PLAYSTATION
+status_t KeyLayoutMap::Parser::parseRequiredKernelConfig() {
+    String8 codeToken = mTokenizer->nextToken(WHITESPACE);
+    std::string configName = codeToken.string();
+
+    const auto result = mMap->mRequiredKernelConfigs.emplace(configName);
+    if (!result.second) {
+        ALOGE("%s: Duplicate entry for required kernel config %s.",
+              mTokenizer->getLocation().string(), configName.c_str());
+        return BAD_VALUE;
+    }
+
+    ALOGD_IF(DEBUG_PARSER, "Parsed required kernel config: name=%s", configName.c_str());
+    return NO_ERROR;
+}
+
 } // namespace android
diff --git a/libs/input/Keyboard.cpp b/libs/input/Keyboard.cpp
index f0895b3..c3f5151 100644
--- a/libs/input/Keyboard.cpp
+++ b/libs/input/Keyboard.cpp
@@ -20,16 +20,23 @@
 #include <unistd.h>
 #include <limits.h>
 
-#include <input/Keyboard.h>
-#include <input/InputEventLabels.h>
-#include <input/KeyLayoutMap.h>
-#include <input/KeyCharacterMap.h>
 #include <input/InputDevice.h>
+#include <input/InputEventLabels.h>
+#include <input/KeyCharacterMap.h>
+#include <input/KeyLayoutMap.h>
+#include <input/Keyboard.h>
+#include <log/log.h>
 #include <utils/Errors.h>
-#include <utils/Log.h>
 
 namespace android {
 
+static std::string getPath(const InputDeviceIdentifier& deviceIdentifier, const std::string& name,
+                           InputDeviceConfigurationFileType type) {
+    return name.empty()
+            ? getInputDeviceConfigurationFilePathByDeviceIdentifier(deviceIdentifier, type)
+            : getInputDeviceConfigurationFilePathByName(name, type);
+}
+
 // --- KeyMap ---
 
 KeyMap::KeyMap() {
@@ -111,11 +118,25 @@
     }
 
     base::Result<std::shared_ptr<KeyLayoutMap>> ret = KeyLayoutMap::load(path);
+    if (ret.ok()) {
+        keyLayoutMap = *ret;
+        keyLayoutFile = path;
+        return OK;
+    }
+
+    // Try to load fallback layout if the regular layout could not be loaded due to missing
+    // kernel modules
+    std::string fallbackPath(
+            getInputDeviceConfigurationFilePathByDeviceIdentifier(deviceIdentifier,
+                                                                  InputDeviceConfigurationFileType::
+                                                                          KEY_LAYOUT,
+                                                                  "_fallback"));
+    ret = KeyLayoutMap::load(fallbackPath);
     if (!ret.ok()) {
         return ret.error().code();
     }
     keyLayoutMap = *ret;
-    keyLayoutFile = path;
+    keyLayoutFile = fallbackPath;
     return OK;
 }
 
@@ -137,14 +158,6 @@
     return OK;
 }
 
-std::string KeyMap::getPath(const InputDeviceIdentifier& deviceIdentifier,
-        const std::string& name, InputDeviceConfigurationFileType type) {
-    return name.empty()
-            ? getInputDeviceConfigurationFilePathByDeviceIdentifier(deviceIdentifier, type)
-            : getInputDeviceConfigurationFilePathByName(name, type);
-}
-
-
 // --- Global functions ---
 
 bool isKeyboardSpecialFunction(const PropertyMap* config) {
diff --git a/libs/input/android/os/InputConfig.aidl b/libs/input/android/os/InputConfig.aidl
index 6d1b396..4e644ff 100644
--- a/libs/input/android/os/InputConfig.aidl
+++ b/libs/input/android/os/InputConfig.aidl
@@ -144,4 +144,10 @@
      * It is not valid to set this configuration if {@link #TRUSTED_OVERLAY} is not set.
      */
     INTERCEPTS_STYLUS            = 1 << 15,
+
+    /**
+     * The window is a clone of another window. This may be treated differently since there's
+     * likely a duplicate window with the same client token, but different bounds.
+     */
+    CLONE                        = 1 << 16,
 }
diff --git a/libs/input/tests/Android.bp b/libs/input/tests/Android.bp
index 54f7586..c53811a 100644
--- a/libs/input/tests/Android.bp
+++ b/libs/input/tests/Android.bp
@@ -37,8 +37,9 @@
         "liblog",
         "libui",
         "libutils",
+        "libvintf",
     ],
-    data: ["data/*.kcm"],
+    data: ["data/*"],
     test_suites: ["device-tests"],
 }
 
diff --git a/libs/input/tests/InputDevice_test.cpp b/libs/input/tests/InputDevice_test.cpp
index 6b695c4..e872fa4 100644
--- a/libs/input/tests/InputDevice_test.cpp
+++ b/libs/input/tests/InputDevice_test.cpp
@@ -130,4 +130,20 @@
     ASSERT_EQ(*mKeyMap.keyCharacterMap, *frenchOverlaidKeyCharacterMap);
 }
 
+TEST(InputDeviceKeyLayoutTest, DoesNotLoadWhenRequiredKernelConfigIsMissing) {
+    std::string klPath = base::GetExecutableDirectory() + "/data/kl_with_required_fake_config.kl";
+    base::Result<std::shared_ptr<KeyLayoutMap>> ret = KeyLayoutMap::load(klPath);
+    ASSERT_FALSE(ret.ok()) << "Should not be able to load KeyLayout at " << klPath;
+    // We assert error message here because it's used by 'validatekeymaps' tool
+    ASSERT_EQ("Missing kernel config", ret.error().message());
+}
+
+TEST(InputDeviceKeyLayoutTest, LoadsWhenRequiredKernelConfigIsPresent) {
+    std::string klPath = base::GetExecutableDirectory() + "/data/kl_with_required_real_config.kl";
+    base::Result<std::shared_ptr<KeyLayoutMap>> ret = KeyLayoutMap::load(klPath);
+    ASSERT_TRUE(ret.ok()) << "Cannot load KeyLayout at " << klPath;
+    const std::shared_ptr<KeyLayoutMap>& map = *ret;
+    ASSERT_NE(nullptr, map) << "Map should be valid because CONFIG_UHID should always be present";
+}
+
 } // namespace android
diff --git a/libs/input/tests/data/kl_with_required_fake_config.kl b/libs/input/tests/data/kl_with_required_fake_config.kl
new file mode 100644
index 0000000..2d0a507
--- /dev/null
+++ b/libs/input/tests/data/kl_with_required_fake_config.kl
@@ -0,0 +1,20 @@
+# Copyright (C) 2022 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.
+
+# This KL should not be loaded unless the below config is present in the kernel
+# This config will never exist, and therefore this KL should never be loaded
+requires_kernel_config CONFIG_HID_FAKEMODULE
+
+# An arbitrary mapping taken from another file
+key 0x130    BUTTON_X
\ No newline at end of file
diff --git a/libs/input/tests/data/kl_with_required_real_config.kl b/libs/input/tests/data/kl_with_required_real_config.kl
new file mode 100644
index 0000000..303b23e
--- /dev/null
+++ b/libs/input/tests/data/kl_with_required_real_config.kl
@@ -0,0 +1,21 @@
+# Copyright (C) 2022 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.
+
+# This KL should not be loaded unless the below config is present in the kernel
+# The CONFIG_UHID option has been required for a while, and therefore it's safe
+# to assume that this will always be loaded
+requires_kernel_config CONFIG_UHID
+
+# An arbitrary mapping taken from another file
+key 0x130    BUTTON_X
\ No newline at end of file
diff --git a/libs/nativedisplay/Android.bp b/libs/nativedisplay/Android.bp
index e3fad3d..8d8a2bc 100644
--- a/libs/nativedisplay/Android.bp
+++ b/libs/nativedisplay/Android.bp
@@ -43,8 +43,6 @@
         "include-private",
     ],
 
-    clang: true,
-
     cflags: [
         "-Wall",
         "-Werror",
diff --git a/libs/nativewindow/Android.bp b/libs/nativewindow/Android.bp
index d30efa1..dd07319 100644
--- a/libs/nativewindow/Android.bp
+++ b/libs/nativewindow/Android.bp
@@ -77,8 +77,6 @@
         "include-private",
     ],
 
-    clang: true,
-
     cflags: [
         "-Wall",
         "-Werror",
diff --git a/libs/renderengine/Android.bp b/libs/renderengine/Android.bp
index cb92df3..f6f57dd 100644
--- a/libs/renderengine/Android.bp
+++ b/libs/renderengine/Android.bp
@@ -111,7 +111,6 @@
     name: "librenderengine",
     defaults: ["librenderengine_defaults"],
     double_loadable: true,
-    clang: true,
     cflags: [
         "-fvisibility=hidden",
         "-Werror=format",
diff --git a/libs/sensor/Android.bp b/libs/sensor/Android.bp
index 11760eb..2b93c6e 100644
--- a/libs/sensor/Android.bp
+++ b/libs/sensor/Android.bp
@@ -24,7 +24,6 @@
 cc_library_shared {
     name: "libsensor",
 
-    clang: true,
     cflags: [
         "-Wall",
         "-Werror",
diff --git a/libs/ui/Android.bp b/libs/ui/Android.bp
index 0a85fe0..ca8adfa 100644
--- a/libs/ui/Android.bp
+++ b/libs/ui/Android.bp
@@ -36,7 +36,6 @@
 
 cc_defaults {
     name: "libui-defaults",
-    clang: true,
     cflags: [
         "-Wall",
         "-Werror",
@@ -111,7 +110,6 @@
     },
     double_loadable: true,
 
-    clang: true,
     cflags: [
         "-Wall",
         "-Werror",
diff --git a/libs/vr/libbroadcastring/Android.bp b/libs/vr/libbroadcastring/Android.bp
index fa449ae..e72ca74 100644
--- a/libs/vr/libbroadcastring/Android.bp
+++ b/libs/vr/libbroadcastring/Android.bp
@@ -26,7 +26,6 @@
 
 cc_test {
     name: "broadcast_ring_tests",
-    clang: true,
     cflags: [
         "-Wall",
         "-Wextra",
diff --git a/libs/vr/libpdx/Android.bp b/libs/vr/libpdx/Android.bp
index c1f6da3..c95603b 100644
--- a/libs/vr/libpdx/Android.bp
+++ b/libs/vr/libpdx/Android.bp
@@ -16,7 +16,6 @@
 
 cc_library_static {
     name: "libpdx",
-    clang: true,
     cflags: [
         "-Wall",
         "-Wextra",
@@ -42,7 +41,6 @@
 
 cc_test {
     name: "pdx_tests",
-    clang: true,
     cflags: [
         "-Wall",
         "-Wextra",
@@ -72,7 +70,6 @@
 // Code analysis target.
 cc_test {
     name: "pdx_encoder_performance_test",
-    clang: true,
     cflags: [
         "-Wall",
         "-Wextra",
diff --git a/libs/vr/libpdx/fuzz/Android.bp b/libs/vr/libpdx/fuzz/Android.bp
index 23b852c..ac831ce 100644
--- a/libs/vr/libpdx/fuzz/Android.bp
+++ b/libs/vr/libpdx/fuzz/Android.bp
@@ -9,7 +9,6 @@
 
 cc_fuzz {
     name: "libpdx_service_dispatcher_fuzzer",
-    clang: true,
     srcs: [
         "service_dispatcher_fuzzer.cpp",
     ],
@@ -30,7 +29,6 @@
 
 cc_fuzz {
     name: "libpdx_message_fuzzer",
-    clang: true,
     srcs: [
         "message_fuzzer.cpp",
     ],
@@ -51,7 +49,6 @@
 
 cc_fuzz {
     name: "libpdx_serialization_fuzzer",
-    clang: true,
     srcs: [
         "serialization_fuzzer.cpp",
     ],
diff --git a/libs/vr/libpdx_default_transport/Android.bp b/libs/vr/libpdx_default_transport/Android.bp
index cfdab35..a5758b5 100644
--- a/libs/vr/libpdx_default_transport/Android.bp
+++ b/libs/vr/libpdx_default_transport/Android.bp
@@ -9,7 +9,6 @@
 
 cc_defaults {
     name: "pdx_default_transport_compiler_defaults",
-    clang: true,
     cflags: [
         "-Wall",
         "-Wextra",
diff --git a/libs/vr/libpdx_uds/Android.bp b/libs/vr/libpdx_uds/Android.bp
index 216ca9f..7f88daf 100644
--- a/libs/vr/libpdx_uds/Android.bp
+++ b/libs/vr/libpdx_uds/Android.bp
@@ -9,7 +9,6 @@
 
 cc_library_static {
     name: "libpdx_uds",
-    clang: true,
     cflags: [
         "-Wall",
         "-Wextra",
@@ -41,7 +40,6 @@
 
 cc_test {
     name: "libpdx_uds_tests",
-    clang: true,
     cflags: [
         "-Wall",
         "-Wextra",
diff --git a/services/inputflinger/TEST_MAPPING b/services/inputflinger/TEST_MAPPING
index b4b617e..318940b 100644
--- a/services/inputflinger/TEST_MAPPING
+++ b/services/inputflinger/TEST_MAPPING
@@ -77,5 +77,84 @@
         }
       ]
     }
+  ],
+  "hwasan-postsubmit": [
+    {
+      "name": "CtsWindowManagerDeviceTestCases",
+      "options": [
+        {
+          "include-filter": "android.server.wm.WindowInputTests"
+        }
+      ]
+    },
+    {
+      "name": "libinput_tests"
+    },
+    {
+      "name": "inputflinger_tests"
+    },
+    {
+      "name": "libpalmrejection_test"
+    },
+    {
+      "name": "InputTests"
+    },
+    {
+      "name": "libinputservice_test"
+    },
+    {
+      "name": "CtsHardwareTestCases",
+      "options": [
+        {
+          "include-filter": "android.hardware.input.cts.tests"
+        }
+      ]
+    },
+    {
+      "name": "CtsInputTestCases"
+    },
+    {
+      "name": "CtsViewTestCases",
+      "options": [
+        {
+          "include-filter": "android.view.cts.MotionEventTest",
+          "include-filter": "android.view.cts.PointerCaptureTest",
+          "include-filter": "android.view.cts.VerifyInputEventTest"
+        }
+      ]
+    },
+    {
+      "name": "FrameworksCoreTests",
+      "options": [
+        {
+          "include-filter": "android.view.VerifiedKeyEventTest",
+          "include-filter": "android.view.VerifiedMotionEventTest"
+        }
+      ]
+    },
+    {
+      "name": "FrameworksServicesTests",
+      "options": [
+        {
+          "include-filter": "com.android.server.input"
+        }
+      ]
+    },
+    {
+      "name": "CtsSecurityTestCases",
+      "options": [
+        {
+          "include-filter": "android.security.cts.MotionEventTest"
+        }
+      ]
+    },
+    {
+      "name": "CtsSecurityBulletinHostTestCases",
+      "options": [
+        {
+          "include-filter": "android.security.cts.Poc19_03#testPocBug_115739809"
+        }
+      ]
+    }
   ]
 }
diff --git a/services/inputflinger/dispatcher/FocusResolver.cpp b/services/inputflinger/dispatcher/FocusResolver.cpp
index a02b3e8..4da846b 100644
--- a/services/inputflinger/dispatcher/FocusResolver.cpp
+++ b/services/inputflinger/dispatcher/FocusResolver.cpp
@@ -13,24 +13,20 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
-#define LOG_TAG "FocusResolver"
+#define LOG_TAG "InputDispatcher"
 #define ATRACE_TAG ATRACE_TAG_INPUT
 
 #define INDENT "  "
 #define INDENT2 "    "
 
-// Log debug messages about input focus tracking.
-static constexpr bool DEBUG_FOCUS = false;
-
 #include <inttypes.h>
 
 #include <android-base/stringprintf.h>
 #include <binder/Binder.h>
 #include <ftl/enum.h>
 #include <gui/WindowInfo.h>
-#include <log/log.h>
 
+#include "DebugConfig.h"
 #include "FocusResolver.h"
 
 using android::gui::FocusRequest;
diff --git a/services/inputflinger/dispatcher/InputDispatcher.cpp b/services/inputflinger/dispatcher/InputDispatcher.cpp
index b6488ff..0b3b770 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.cpp
+++ b/services/inputflinger/dispatcher/InputDispatcher.cpp
@@ -2509,7 +2509,7 @@
 }
 
 void InputDispatcher::addDragEventLocked(const MotionEntry& entry) {
-    if (!mDragState) {
+    if (!mDragState || mDragState->dragWindow->getInfo()->displayId != entry.displayId) {
         return;
     }
 
@@ -4767,9 +4767,11 @@
 
         // If drag window is gone, it would receive a cancel event and broadcast the DRAG_END. We
         // could just clear the state here.
-        if (mDragState &&
+        if (mDragState && mDragState->dragWindow->getInfo()->displayId == displayId &&
             std::find(windowHandles.begin(), windowHandles.end(), mDragState->dragWindow) ==
                     windowHandles.end()) {
+            ALOGI("Drag window went away: %s", mDragState->dragWindow->getName().c_str());
+            sendDropWindowCommandLocked(nullptr, 0, 0);
             mDragState.reset();
         }
     }
diff --git a/services/inputflinger/reader/EventHub.cpp b/services/inputflinger/reader/EventHub.cpp
index d6a6bd2..669d2e1 100644
--- a/services/inputflinger/reader/EventHub.cpp
+++ b/services/inputflinger/reader/EventHub.cpp
@@ -452,8 +452,7 @@
         return false;
     }
 
-    std::vector<int32_t> scanCodes;
-    keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes);
+    std::vector<int32_t> scanCodes = keyMap.keyLayoutMap->findScanCodesForKey(keycode);
     const size_t N = scanCodes.size();
     for (size_t i = 0; i < N && i <= KEY_MAX; i++) {
         int32_t sc = scanCodes[i];
@@ -548,10 +547,10 @@
         return NAME_NOT_FOUND;
     }
 
-    int32_t scanCode;
-    if (keyMap.keyLayoutMap->findScanCodeForLed(led, &scanCode) != NAME_NOT_FOUND) {
-        if (scanCode >= 0 && scanCode <= LED_MAX && ledBitmask.test(scanCode)) {
-            *outScanCode = scanCode;
+    std::optional<int32_t> scanCode = keyMap.keyLayoutMap->findScanCodeForLed(led);
+    if (scanCode.has_value()) {
+        if (*scanCode >= 0 && *scanCode <= LED_MAX && ledBitmask.test(*scanCode)) {
+            *outScanCode = *scanCode;
             return NO_ERROR;
         }
     }
@@ -865,8 +864,7 @@
 
     Device* device = getDeviceLocked(deviceId);
     if (device != nullptr && device->hasValidFd() && device->keyMap.haveKeyLayout()) {
-        std::vector<int32_t> scanCodes;
-        device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes);
+        std::vector<int32_t> scanCodes = device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode);
         if (scanCodes.size() != 0) {
             if (device->readDeviceBitMask(EVIOCGKEY(0), device->keyState) >= 0) {
                 for (size_t i = 0; i < scanCodes.size(); i++) {
@@ -890,8 +888,8 @@
         device->keyMap.keyLayoutMap == nullptr) {
         return AKEYCODE_UNKNOWN;
     }
-    std::vector<int32_t> scanCodes;
-    device->keyMap.keyLayoutMap->findScanCodesForKey(locationKeyCode, &scanCodes);
+    std::vector<int32_t> scanCodes =
+            device->keyMap.keyLayoutMap->findScanCodesForKey(locationKeyCode);
     if (scanCodes.empty()) {
         ALOGW("Failed to get key code for key location: no scan code maps to key code %d for input"
               "device %d",
@@ -960,20 +958,16 @@
 
     Device* device = getDeviceLocked(deviceId);
     if (device != nullptr && device->keyMap.haveKeyLayout()) {
-        std::vector<int32_t> scanCodes;
         for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) {
-            scanCodes.clear();
+            std::vector<int32_t> scanCodes =
+                    device->keyMap.keyLayoutMap->findScanCodesForKey(keyCodes[codeIndex]);
 
-            status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey(keyCodes[codeIndex],
-                                                                            &scanCodes);
-            if (!err) {
-                // check the possible scan codes identified by the layout map against the
-                // map of codes actually emitted by the driver
-                for (size_t sc = 0; sc < scanCodes.size(); sc++) {
-                    if (device->keyBitmask.test(scanCodes[sc])) {
-                        outFlags[codeIndex] = 1;
-                        break;
-                    }
+            // check the possible scan codes identified by the layout map against the
+            // map of codes actually emitted by the driver
+            for (size_t sc = 0; sc < scanCodes.size(); sc++) {
+                if (device->keyBitmask.test(scanCodes[sc])) {
+                    outFlags[codeIndex] = 1;
+                    break;
                 }
             }
         }
@@ -1027,14 +1021,15 @@
     std::scoped_lock _l(mLock);
     Device* device = getDeviceLocked(deviceId);
 
-    if (device != nullptr && device->keyMap.haveKeyLayout()) {
-        status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo);
-        if (err == NO_ERROR) {
-            return NO_ERROR;
-        }
+    if (device == nullptr || !device->keyMap.haveKeyLayout()) {
+        return NAME_NOT_FOUND;
     }
-
-    return NAME_NOT_FOUND;
+    std::optional<AxisInfo> info = device->keyMap.keyLayoutMap->mapAxis(scanCode);
+    if (!info.has_value()) {
+        return NAME_NOT_FOUND;
+    }
+    *outAxisInfo = *info;
+    return NO_ERROR;
 }
 
 base::Result<std::pair<InputDeviceSensorType, int32_t>> EventHub::mapSensor(int32_t deviceId,
diff --git a/services/inputflinger/reader/Macros.h b/services/inputflinger/reader/Macros.h
index d837689..1bbf386 100644
--- a/services/inputflinger/reader/Macros.h
+++ b/services/inputflinger/reader/Macros.h
@@ -20,27 +20,65 @@
 #define LOG_TAG "InputReader"
 
 //#define LOG_NDEBUG 0
+#include <log/log.h>
+#include <log/log_event_list.h>
 
-// Log debug messages for each raw event received from the EventHub.
-static constexpr bool DEBUG_RAW_EVENTS = false;
+namespace android {
+/**
+ * Log debug messages for each raw event received from the EventHub.
+ * Enable this via "adb shell setprop log.tag.InputReaderRawEvents DEBUG" (requires restart)
+ */
+const bool DEBUG_RAW_EVENTS =
+        __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG "RawEvents", ANDROID_LOG_INFO);
 
-// Log debug messages about virtual key processing.
-static constexpr bool DEBUG_VIRTUAL_KEYS = false;
+/**
+ * Log debug messages about virtual key processing.
+ * Enable this via "adb shell setprop log.tag.InputReaderVirtualKeys DEBUG" (requires restart)
+ */
+const bool DEBUG_VIRTUAL_KEYS =
+        __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG "VirtualKeys", ANDROID_LOG_INFO);
 
-// Log debug messages about pointers.
-static constexpr bool DEBUG_POINTERS = false;
+/**
+ * Log debug messages about pointers.
+ * Enable this via "adb shell setprop log.tag.InputReaderPointers DEBUG" (requires restart)
+ */
+const bool DEBUG_POINTERS =
+        __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG "Pointers", ANDROID_LOG_INFO);
 
-// Log debug messages about pointer assignment calculations.
-static constexpr bool DEBUG_POINTER_ASSIGNMENT = false;
+/**
+ * Log debug messages about pointer assignment calculations.
+ * Enable this via "adb shell setprop log.tag.InputReaderPointerAssignment DEBUG" (requires restart)
+ */
+const bool DEBUG_POINTER_ASSIGNMENT =
+        __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG "PointerAssignment", ANDROID_LOG_INFO);
+/**
+ * Log debug messages about gesture detection.
+ * Enable this via "adb shell setprop log.tag.InputReaderGestures DEBUG" (requires restart)
+ */
+const bool DEBUG_GESTURES =
+        __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG "Gestures", ANDROID_LOG_INFO);
 
-// Log debug messages about gesture detection.
-static constexpr bool DEBUG_GESTURES = false;
+/**
+ * Log debug messages about the vibrator.
+ * Enable this via "adb shell setprop log.tag.InputReaderVibrator DEBUG" (requires restart)
+ */
+const bool DEBUG_VIBRATOR =
+        __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG "Vibrator", ANDROID_LOG_INFO);
 
-// Log debug messages about the vibrator.
-static constexpr bool DEBUG_VIBRATOR = false;
+/**
+ * Log debug messages about fusing stylus data.
+ * Enable this via "adb shell setprop log.tag.InputReaderStylusFusion DEBUG" (requires restart)
+ */
+const bool DEBUG_STYLUS_FUSION =
+        __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG "StylusFusion", ANDROID_LOG_INFO);
 
-// Log debug messages about fusing stylus data.
-static constexpr bool DEBUG_STYLUS_FUSION = false;
+/**
+ * Log detailed debug messages about input device lights.
+ * Enable this via "adb shell setprop log.tag.InputReaderLightDetails DEBUG" (requires restart)
+ */
+const bool DEBUG_LIGHT_DETAILS =
+        __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG "LightDetails", ANDROID_LOG_INFO);
+} // namespace android
 
 #define INDENT "  "
 #define INDENT2 "    "
diff --git a/services/inputflinger/reader/controller/PeripheralController.cpp b/services/inputflinger/reader/controller/PeripheralController.cpp
index a693496..7673174 100644
--- a/services/inputflinger/reader/controller/PeripheralController.cpp
+++ b/services/inputflinger/reader/controller/PeripheralController.cpp
@@ -22,9 +22,6 @@
 #include "../Macros.h"
 #include "PeripheralController.h"
 
-// Log detailed debug messages about input device lights.
-static constexpr bool DEBUG_LIGHT_DETAILS = false;
-
 namespace android {
 
 static inline int32_t getAlpha(int32_t color) {
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index 35da4d8..0c0f9f8 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -6405,6 +6405,58 @@
     mSecondWindow->consumeMotionMove();
 }
 
+TEST_F(InputDispatcherDragTests, DragAndDropWhenMultiDisplays) {
+    performDrag();
+
+    // Update window of second display.
+    sp<FakeWindowHandle> windowInSecondary =
+            new FakeWindowHandle(mApp, mDispatcher, "D_2", SECOND_DISPLAY_ID);
+    mDispatcher->setInputWindows({{SECOND_DISPLAY_ID, {windowInSecondary}}});
+
+    // Let second display has a touch state.
+    ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+              injectMotionEvent(mDispatcher,
+                                MotionEventBuilder(AMOTION_EVENT_ACTION_DOWN,
+                                                   AINPUT_SOURCE_TOUCHSCREEN)
+                                        .displayId(SECOND_DISPLAY_ID)
+                                        .pointer(PointerBuilder(0, AMOTION_EVENT_TOOL_TYPE_FINGER)
+                                                         .x(100)
+                                                         .y(100))
+                                        .build()));
+    windowInSecondary->consumeEvent(AINPUT_EVENT_TYPE_MOTION, AMOTION_EVENT_ACTION_DOWN,
+                                    SECOND_DISPLAY_ID, 0 /* expectedFlag */);
+    // Update window again.
+    mDispatcher->setInputWindows({{SECOND_DISPLAY_ID, {windowInSecondary}}});
+
+    // Move on window.
+    ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+              injectMotionEvent(mDispatcher, AMOTION_EVENT_ACTION_MOVE, AINPUT_SOURCE_TOUCHSCREEN,
+                                ADISPLAY_ID_DEFAULT, {50, 50}))
+            << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
+    mDragWindow->consumeMotionMove(ADISPLAY_ID_DEFAULT);
+    mWindow->consumeDragEvent(false, 50, 50);
+    mSecondWindow->assertNoEvents();
+
+    // Move to another window.
+    ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+              injectMotionEvent(mDispatcher, AMOTION_EVENT_ACTION_MOVE, AINPUT_SOURCE_TOUCHSCREEN,
+                                ADISPLAY_ID_DEFAULT, {150, 50}))
+            << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
+    mDragWindow->consumeMotionMove(ADISPLAY_ID_DEFAULT);
+    mWindow->consumeDragEvent(true, 150, 50);
+    mSecondWindow->consumeDragEvent(false, 50, 50);
+
+    // drop to another window.
+    ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+              injectMotionUp(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+                             {150, 50}))
+            << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
+    mDragWindow->consumeMotionUp(ADISPLAY_ID_DEFAULT);
+    mFakePolicy->assertDropTargetEquals(mSecondWindow->getToken());
+    mWindow->assertNoEvents();
+    mSecondWindow->assertNoEvents();
+}
+
 class InputDispatcherDropInputFeatureTest : public InputDispatcherTest {};
 
 TEST_F(InputDispatcherDropInputFeatureTest, WindowDropsInput) {
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index c86b40e..47ccc50 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -2418,7 +2418,7 @@
     // If the layer is a clone, we need to crop the input region to cloned root to prevent
     // touches from going outside the cloned area.
     if (isClone()) {
-        info.isClone = true;
+        info.inputConfig |= WindowInfo::InputConfig::CLONE;
         if (const sp<Layer> clonedRoot = getClonedRoot()) {
             const Rect rect = displayTransform.transform(Rect{clonedRoot->mScreenBounds});
             info.touchableRegion = info.touchableRegion.intersect(rect);
diff --git a/services/surfaceflinger/Scheduler/OneShotTimer.cpp b/services/surfaceflinger/Scheduler/OneShotTimer.cpp
index 9c6e56d..3c8dc64 100644
--- a/services/surfaceflinger/Scheduler/OneShotTimer.cpp
+++ b/services/surfaceflinger/Scheduler/OneShotTimer.cpp
@@ -118,16 +118,17 @@
         auto triggerTime = mClock->now() + mInterval;
         state = TimerState::WAITING;
         while (true) {
-            mWaiting = true;
-            constexpr auto zero = std::chrono::steady_clock::duration::zero();
-            // Wait for mInterval time to check if we need to reset or drop into the idle state.
-            struct timespec ts;
-            calculateTimeoutTime(std::chrono::nanoseconds(mInterval), &ts);
-            int result = sem_clockwait(&mSemaphore, CLOCK_MONOTONIC, &ts);
-            if (result && errno != ETIMEDOUT && errno != EINTR) {
-                std::stringstream ss;
-                ss << "sem_clockwait failed (" << errno << ")";
-                LOG_ALWAYS_FATAL("%s", ss.str().c_str());
+            // Wait until triggerTime time to check if we need to reset or drop into the idle state.
+            if (const auto triggerInterval = triggerTime - mClock->now(); triggerInterval > 0ns) {
+                mWaiting = true;
+                struct timespec ts;
+                calculateTimeoutTime(triggerInterval, &ts);
+                int result = sem_clockwait(&mSemaphore, CLOCK_MONOTONIC, &ts);
+                if (result && errno != ETIMEDOUT && errno != EINTR) {
+                    std::stringstream ss;
+                    ss << "sem_clockwait failed (" << errno << ")";
+                    LOG_ALWAYS_FATAL("%s", ss.str().c_str());
+                }
             }
 
             mWaiting = false;
@@ -136,7 +137,7 @@
                 break;
             }
 
-            if (state == TimerState::WAITING && (triggerTime - mClock->now()) <= zero) {
+            if (state == TimerState::WAITING && (triggerTime - mClock->now()) <= 0ns) {
                 triggerTimeout = true;
                 state = TimerState::IDLE;
                 break;
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 450c6c0..d72e639 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -6732,6 +6732,7 @@
     clientCompositionDisplay.orientation = rotation;
 
     clientCompositionDisplay.outputDataspace = dataspace;
+    clientCompositionDisplay.currentLuminanceNits = displayBrightnessNits;
     clientCompositionDisplay.maxLuminance = DisplayDevice::sDefaultMaxLumiance;
     clientCompositionDisplay.renderIntent =
             static_cast<aidl::android::hardware::graphics::composer3::RenderIntent>(renderIntent);
@@ -7432,6 +7433,8 @@
         dinfo.manufacturerPnpId =
                 std::vector<uint8_t>(dpi->manufacturerPnpId.begin(), dpi->manufacturerPnpId.end());
         dinfo.productId = dpi->productId;
+        dinfo.relativeAddress =
+                std::vector<uint8_t>(dpi->relativeAddress.begin(), dpi->relativeAddress.end());
         if (const auto* model =
                     std::get_if<DeviceProductInfo::ModelYear>(&dpi->manufactureOrModelDate)) {
             gui::DeviceProductInfo::ModelYear modelYear;
diff --git a/services/surfaceflinger/tests/unittests/OneShotTimerTest.cpp b/services/surfaceflinger/tests/unittests/OneShotTimerTest.cpp
index 597e5e7..aafc323 100644
--- a/services/surfaceflinger/tests/unittests/OneShotTimerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/OneShotTimerTest.cpp
@@ -130,6 +130,40 @@
     EXPECT_FALSE(mResetTimerCallback.waitForUnexpectedCall().has_value());
 }
 
+// TODO(b/186417847) This test is new and passes locally, but may be flaky
+TEST_F(OneShotTimerTest, DISABLED_resetBackToBackSlowAdvanceTest) {
+    fake::FakeClock* clock = new fake::FakeClock();
+    mIdleTimer = std::make_unique<scheduler::OneShotTimer>("TestTimer", 1ms,
+                                                           mResetTimerCallback.getInvocable(),
+                                                           mExpiredTimerCallback.getInvocable(),
+                                                           std::unique_ptr<fake::FakeClock>(clock));
+    mIdleTimer->start();
+    EXPECT_TRUE(mResetTimerCallback.waitForCall().has_value());
+
+    mIdleTimer->reset();
+    EXPECT_FALSE(mResetTimerCallback.waitForUnexpectedCall().has_value());
+    EXPECT_FALSE(mExpiredTimerCallback.waitForUnexpectedCall().has_value());
+
+    clock->advanceTime(200us);
+    mIdleTimer->reset();
+
+    // Normally we would check that the timer callbacks weren't invoked here
+    // after resetting the timer, but we need to precisely control the timing of
+    // this test, and checking that callbacks weren't invoked requires non-zero
+    // time.
+
+    clock->advanceTime(1500us);
+    EXPECT_TRUE(mExpiredTimerCallback.waitForCall(1100us).has_value());
+    mIdleTimer->reset();
+    EXPECT_TRUE(mResetTimerCallback.waitForCall().has_value());
+
+    mIdleTimer->stop();
+    clock->advanceTime(2ms);
+    // Final quick check that no more callback were observed.
+    EXPECT_FALSE(mExpiredTimerCallback.waitForUnexpectedCall().has_value());
+    EXPECT_FALSE(mResetTimerCallback.waitForUnexpectedCall().has_value());
+}
+
 TEST_F(OneShotTimerTest, startNotCalledTest) {
     fake::FakeClock* clock = new fake::FakeClock();
     mIdleTimer = std::make_unique<scheduler::OneShotTimer>("TestTimer", 1ms,
diff --git a/services/utils/tests/Android.bp b/services/utils/tests/Android.bp
index 54cf5b7..cfa8a08 100644
--- a/services/utils/tests/Android.bp
+++ b/services/utils/tests/Android.bp
@@ -34,5 +34,4 @@
         "libgmock",
         "libserviceutils",
     ],
-    clang: true,
 }
diff --git a/vulkan/libvulkan/Android.bp b/vulkan/libvulkan/Android.bp
index 440c5b1..5719b5c 100644
--- a/vulkan/libvulkan/Android.bp
+++ b/vulkan/libvulkan/Android.bp
@@ -37,7 +37,6 @@
             "vulkan_headers",
         ],
     },
-    clang: true,
     sanitize: {
         misc_undefined: ["integer"],
     },
diff --git a/vulkan/libvulkan/swapchain.cpp b/vulkan/libvulkan/swapchain.cpp
index c4b1487..48d6fd0 100644
--- a/vulkan/libvulkan/swapchain.cpp
+++ b/vulkan/libvulkan/swapchain.cpp
@@ -939,8 +939,7 @@
         // VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR and
         // VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR.  We technically cannot
         // know if VK_PRESENT_MODE_SHARED_MAILBOX_KHR is supported without a
-        // surface, and that cannot be relied upon.
-        present_modes.push_back(VK_PRESENT_MODE_MAILBOX_KHR);
+        // surface, and that cannot be relied upon.  Therefore, don't return it.
         present_modes.push_back(VK_PRESENT_MODE_FIFO_KHR);
     } else {
         ANativeWindow* window = SurfaceFromHandle(surface)->window.get();
diff --git a/vulkan/nulldrv/Android.bp b/vulkan/nulldrv/Android.bp
index 0daad9c..a6d540b 100644
--- a/vulkan/nulldrv/Android.bp
+++ b/vulkan/nulldrv/Android.bp
@@ -27,7 +27,6 @@
     proprietary: true,
     relative_install_path: "hw",
 
-    clang: true,
     cflags: [
         "-fvisibility=hidden",
         "-fstrict-aliasing",
diff --git a/vulkan/vkjson/Android.bp b/vulkan/vkjson/Android.bp
index fa0258b..b6d3a0b 100644
--- a/vulkan/vkjson/Android.bp
+++ b/vulkan/vkjson/Android.bp
@@ -37,7 +37,6 @@
 
 cc_library_static {
     name: "libvkjson_ndk",
-    clang: true,
     srcs: [
         "vkjson.cc",
         "vkjson_instance.cc",