BBQ: Update TransactionHangCallback to pass ANR reason

Bug: 244218818
Test: presubmits

Change-Id: I00f961c743665b1a38fe3a9e66935b11570bc3e4

core/java/android/view/ViewRootImpl.java

@@ -888,20 +888,18 @@ public final class ViewRootImpl implements ViewParent,
     static BLASTBufferQueue.TransactionHangCallback sTransactionHangCallback =
         new BLASTBufferQueue.TransactionHangCallback() {
             @Override
-            public void onTransactionHang(boolean isGPUHang) {
-                if (isGPUHang && !sAnrReported) {
-                    sAnrReported = true;
-                    try {
-                        ActivityManager.getService().appNotResponding(
-                            "Buffer processing hung up due to stuck fence. Indicates GPU hang");
-                    } catch (RemoteException e) {
-                        // We asked the system to crash us, but the system
-                        // already crashed. Unfortunately things may be
-                        // out of control.
-                    }
-                } else {
-                    // TODO: Do something with this later. For now we just ANR
-                    // in dequeue buffer later like we always have.
+            public void onTransactionHang(String reason) {
+                if (sAnrReported) {
+                    return;
+                }
+
+                sAnrReported = true;
+                try {
+                    ActivityManager.getService().appNotResponding(reason);
+                } catch (RemoteException e) {
+                    // We asked the system to crash us, but the system
+                    // already crashed. Unfortunately things may be
+                    // out of control.
                 }
             }
         };

core/jni/android_graphics_BLASTBufferQueue.cpp

@@ -71,10 +71,12 @@ public:
         }
     }
 
-    void onTransactionHang(bool isGpuHang) {
+    void onTransactionHang(const std::string& reason) {
         if (mTransactionHangObject) {
+            JNIEnv* env = getenv(mVm);
+            ScopedLocalRef<jstring> jReason(env, env->NewStringUTF(reason.c_str()));
             getenv(mVm)->CallVoidMethod(mTransactionHangObject,
-                                        gTransactionHangCallback.onTransactionHang, isGpuHang);
+                                        gTransactionHangCallback.onTransactionHang, jReason.get());
         }
     }
 
@@ -177,7 +179,7 @@ static bool nativeIsSameSurfaceControl(JNIEnv* env, jclass clazz, jlong ptr, jlo
     sp<BLASTBufferQueue> queue = reinterpret_cast<BLASTBufferQueue*>(ptr);
     return queue->isSameSurfaceControl(reinterpret_cast<SurfaceControl*>(surfaceControl));
 }
-  
+
 static void nativeSetTransactionHangCallback(JNIEnv* env, jclass clazz, jlong ptr,
                                              jobject transactionHangCallback) {
     sp<BLASTBufferQueue> queue = reinterpret_cast<BLASTBufferQueue*>(ptr);
@@ -186,9 +188,8 @@ static void nativeSetTransactionHangCallback(JNIEnv* env, jclass clazz, jlong pt
     } else {
         sp<TransactionHangCallbackWrapper> wrapper =
                 new TransactionHangCallbackWrapper{env, transactionHangCallback};
-        queue->setTransactionHangCallback([wrapper](bool isGpuHang) {
-            wrapper->onTransactionHang(isGpuHang);
-        });
+        queue->setTransactionHangCallback(
+                [wrapper](const std::string& reason) { wrapper->onTransactionHang(reason); });
     }
 }
 
@@ -236,7 +237,8 @@ int register_android_graphics_BLASTBufferQueue(JNIEnv* env) {
     jclass transactionHangClass =
             FindClassOrDie(env, "android/graphics/BLASTBufferQueue$TransactionHangCallback");
     gTransactionHangCallback.onTransactionHang =
-            GetMethodIDOrDie(env, transactionHangClass, "onTransactionHang", "(Z)V");
+            GetMethodIDOrDie(env, transactionHangClass, "onTransactionHang",
+                             "(Ljava/lang/String;)V");
 
     return 0;
 }

graphics/java/android/graphics/BLASTBufferQueue.java

@@ -47,7 +47,7 @@ public final class BLASTBufferQueue {
             TransactionHangCallback callback);
 
     public interface TransactionHangCallback {
-        void onTransactionHang(boolean isGpuHang);
+        void onTransactionHang(String reason);
     }
 
     /** Create a new connection with the surface flinger. */