libmojo: Re-apply all the ARC mods

This change re-adds all the ARC mods that were accidentally dropped
during the uprev.

Bug: 70730080
Test: diff HEAD^ # Shows no TODOs being dropped.
Change-Id: Iaf5481dce46535952ac0e5d9a8accfb28fb2a566

3 files changed, 40 insertions, 19 deletions

diff --git a/base/android/jni_android.cc b/base/android/jni_android.cc
index 56dc5c2..abc37d5 100644
--- a/base/android/jni_android.cc
+++ b/base/android/jni_android.cc
@@ -240,7 +240,16 @@ void CheckException(JNIEnv* env) {
   }
 
   // Now, feel good about it and die.
-  LOG(FATAL) << "Please include Java exception stack in crash report";
+  // TODO(lhchavez): Remove this hack. See b/28814913 for details.
+  // We're using BuildInfo's java_exception_info() instead of storing the
+  // exception info a few lines above to avoid extra copies. It will be
+  // truncated to 1024 bytes anyways.
+  const char* exception_string =
+      base::android::BuildInfo::GetInstance()->java_exception_info();
+  if (exception_string)
+    LOG(FATAL) << exception_string;
+  else
+    LOG(FATAL) << "Unhandled exception";
 }
 
 std::string GetJavaExceptionInfo(JNIEnv* env, jthrowable java_throwable) {
diff --git a/mojo/public/java/bindings/src/org/chromium/mojo/bindings/RouterImpl.java b/mojo/public/java/bindings/src/org/chromium/mojo/bindings/RouterImpl.java
index a278cc5..aebc9e2 100644
--- a/mojo/public/java/bindings/src/org/chromium/mojo/bindings/RouterImpl.java
+++ b/mojo/public/java/bindings/src/org/chromium/mojo/bindings/RouterImpl.java
@@ -171,20 +171,23 @@ public class RouterImpl implements Router {
         assert messageWithHeader.getHeader().hasFlag(MessageHeader.MESSAGE_EXPECTS_RESPONSE_FLAG);
 
         // Compute a request id for being able to route the response.
-        long requestId = mNextRequestId++;
-        // Reserve 0 in case we want it to convey special meaning in the future.
-        if (requestId == 0) {
-            requestId = mNextRequestId++;
-        }
-        if (mResponders.containsKey(requestId)) {
-            throw new IllegalStateException("Unable to find a new request identifier.");
-        }
-        messageWithHeader.setRequestId(requestId);
-        if (!mConnector.accept(messageWithHeader)) {
-            return false;
+        // TODO(lhchavez): Remove this hack. See b/28986534 for details.
+        synchronized (mResponders) {
+            long requestId = mNextRequestId++;
+            // Reserve 0 in case we want it to convey special meaning in the future.
+            if (requestId == 0) {
+                requestId = mNextRequestId++;
+            }
+            if (mResponders.containsKey(requestId)) {
+                throw new IllegalStateException("Unable to find a new request identifier.");
+            }
+            messageWithHeader.setRequestId(requestId);
+            if (!mConnector.accept(messageWithHeader)) {
+                return false;
+            }
+            // Only keep the responder is the message has been accepted.
+            mResponders.put(requestId, responder);
         }
-        // Only keep the responder is the message has been accepted.
-        mResponders.put(requestId, responder);
         return true;
     }
 
@@ -227,11 +230,15 @@ public class RouterImpl implements Router {
             return false;
         } else if (header.hasFlag(MessageHeader.MESSAGE_IS_RESPONSE_FLAG)) {
             long requestId = header.getRequestId();
-            MessageReceiver responder = mResponders.get(requestId);
-            if (responder == null) {
-                return false;
+            MessageReceiver responder;
+            // TODO(lhchavez): Remove this hack. See b/28986534 for details.
+            synchronized (mResponders) {
+                responder = mResponders.get(requestId);
+                if (responder == null) {
+                    return false;
+                }
+                mResponders.remove(requestId);
             }
-            mResponders.remove(requestId);
             return responder.accept(message);
         } else {
             if (mIncomingMessageReceiver != null) {
diff --git a/mojo/public/tools/bindings/generators/java_templates/interface_definition.tmpl b/mojo/public/tools/bindings/generators/java_templates/interface_definition.tmpl
index c7dcbbc..ba31186 100644
--- a/mojo/public/tools/bindings/generators/java_templates/interface_definition.tmpl
+++ b/mojo/public/tools/bindings/generators/java_templates/interface_definition.tmpl
@@ -113,7 +113,12 @@ try {
 {%       else %}
             {{request_struct|name}}.deserialize(messageWithHeader.getPayload());
 {%       endif %}
-            getImpl().{{method|name}}({{run_callback('data', method.parameters)}}{% if with_response %}{% if method.parameters %}, {% endif %}new {{response_struct|name}}ProxyToResponder(getCore(), receiver, header.getRequestId()){% endif %});
+            try {
+                getImpl().{{method|name}}({{run_callback('data', method.parameters)}}{% if with_response %}{% if method.parameters %}, {% endif %}new {{response_struct|name}}ProxyToResponder(getCore(), receiver, header.getRequestId()){% endif %});
+            } catch (RuntimeException e) {
+                // TODO(lhchavez): Remove this hack. See b/28814913 for details.
+                android.util.Log.wtf("{{namespace}}.{{interface.name}}", "Uncaught runtime exception", e);
+            }
             return true;
         }
 {%     endif %}