Add some temporary logging to AwContentsGarbageCollectionTest

android_webview/javatests/src/org/chromium/android_webview/test/AwContentsGarbageCollectionTest.java

Index: android_webview/javatests/src/org/chromium/android_webview/test/AwContentsGarbageCollectionTest.java
diff --git a/android_webview/javatests/src/org/chromium/android_webview/test/AwContentsGarbageCollectionTest.java b/android_webview/javatests/src/org/chromium/android_webview/test/AwContentsGarbageCollectionTest.java
index 501ce011a1dd9a30dd6b1e8c5021fe6abcbf1d06..8d6da4c96083d40bf93a6ea521428e9820ca97e6 100644
--- a/android_webview/javatests/src/org/chromium/android_webview/test/AwContentsGarbageCollectionTest.java
+++ b/android_webview/javatests/src/org/chromium/android_webview/test/AwContentsGarbageCollectionTest.java
@@ -12,11 +12,13 @@ import android.test.suitebuilder.annotation.SmallTest;
 import static org.chromium.base.test.util.ScalableTimeout.scaleTimeout;
 
 import org.chromium.android_webview.AwContents;
+import org.chromium.base.Log;
 import org.chromium.base.annotations.SuppressFBWarnings;
 import org.chromium.base.test.util.Feature;
 import org.chromium.content.browser.test.util.Criteria;
 import org.chromium.content.browser.test.util.CriteriaHelper;
 
+import java.util.Map;
 import java.util.concurrent.Callable;
 
 /**
@@ -26,6 +28,8 @@ import java.util.concurrent.Callable;
  * See crbug.com/544098 for why @DisableHardwareAccelerationForTest is needed.
  */
 public class AwContentsGarbageCollectionTest extends AwTestBase {
+    private static final String TAG = "AwGcTest";
+
     // The system retains a strong ref to the last focused view (in InputMethodManager)
     // so allow for 1 'leaked' instance.
     private static final int MAX_IDLE_INSTANCES = 1;
@@ -86,6 +90,7 @@ public class AwContentsGarbageCollectionTest extends AwTestBase {
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testCreateAndGcOneTime() throws Throwable {
+        Log.d(TAG, "testCreateAndGcOneTime start");
         gcAndCheckAllAwContentsDestroyed();
 
         TestAwContentsClient client = new TestAwContentsClient();
@@ -94,10 +99,13 @@ public class AwContentsGarbageCollectionTest extends AwTestBase {
             containerViews[i] = createAwTestContainerViewOnMainSync(client);
             loadUrlAsync(containerViews[i].getAwContents(), "about:blank");
         }
+        Log.d(TAG, "testCreateAndGcOneTime create views done");
 
         containerViews = null;
         removeAllViews();
+        Log.d(TAG, "testCreateAndGcOneTime remove views done");
         gcAndCheckAllAwContentsDestroyed();
+        Log.d(TAG, "testCreateAndGcOneTime end");
     }
 
     @DisableHardwareAccelerationForTest
@@ -172,15 +180,31 @@ public class AwContentsGarbageCollectionTest extends AwTestBase {
     }
 
     private void removeAllViews() throws Throwable {
+        Log.d(TAG, "removeAllViews instrumentation thread");
+        dumpAllThreadStacks();
         runTestOnUiThread(new Runnable() {
             @Override
             public void run() {
+                Log.d(TAG, "removeAllViews UI thread");
                 getActivity().removeAllViews();
             }
         });
+        Log.d(TAG, "removeAllViews instrumentation thread done");
+    }
+
+    private void dumpAllThreadStacks() {
+        Log.d(TAG, "_________________________");
+        for (Map.Entry<Thread, StackTraceElement[]> entry : Thread.getAllStackTraces().entrySet()) {
+            Log.d(TAG, "Thread name: " + entry.getKey().getName());
+            for (StackTraceElement stack : entry.getValue()) {
+                Log.d(TAG, "  " + stack);
+            }
+        }
+        Log.d(TAG, "_________________________");
     }
 
     private void gcAndCheckAllAwContentsDestroyed() throws InterruptedException {
+        Log.d(TAG, "Cause GC");
         Runtime.getRuntime().gc();
 
         Criteria criteria = new Criteria() {
@@ -191,6 +215,7 @@ public class AwContentsGarbageCollectionTest extends AwTestBase {
                         @Override
                         public Boolean call() {
                             int count = AwContents.getNativeInstanceCount();
+                            Log.d(TAG, "NativeInstanceCount = " + count);
                             return count <= MAX_IDLE_INSTANCES;
                         }
                     });
@@ -210,6 +235,7 @@ public class AwContentsGarbageCollectionTest extends AwTestBase {
                 CriteriaHelper.pollForCriteria(criteria, timeoutBetweenGcMs, CHECK_INTERVAL);
                 break;
             } catch (AssertionError e) {
+                Log.d(TAG, "Cause GC " + i);
                 Runtime.getRuntime().gc();
             }
         }