Fix the callstack sent from error reporting runnable

Summary:
The crash logged from `ErrorReporterRunnable` wasn't detailed. For example look at the following video.
Also for some reason the `FlipperConnection` interface doesn't have an argument for crash name. Thus I changed the js side of the plugin to accept `crash.name` to be undefined.

{F155526537}

Reviewed By: passy

Differential Revision: D14852561

fbshipit-source-id: 6daf9847535b4508fa312b4f940b014911aae2e5

android/src/main/cpp/sonar.cpp

@@ -153,10 +153,13 @@ class JFlipperConnectionImpl : public jni::HybridClass<JFlipperConnectionImpl, J
 
   static void registerNatives() {
     registerHybrid({
-      makeNativeMethod("sendObject", JFlipperConnectionImpl::sendObject),
-      makeNativeMethod("sendArray", JFlipperConnectionImpl::sendArray),
-      makeNativeMethod("reportError", JFlipperConnectionImpl::reportError),
-      makeNativeMethod("receive", JFlipperConnectionImpl::receive),
+        makeNativeMethod("sendObject", JFlipperConnectionImpl::sendObject),
+        makeNativeMethod("sendArray", JFlipperConnectionImpl::sendArray),
+        makeNativeMethod("reportError", JFlipperConnectionImpl::reportError),
+        makeNativeMethod(
+            "reportErrorWithMetadata",
+            JFlipperConnectionImpl::reportErrorWithMetadata),
+        makeNativeMethod("receive", JFlipperConnectionImpl::receive),
     });
   }
 
@@ -168,8 +171,15 @@ class JFlipperConnectionImpl : public jni::HybridClass<JFlipperConnectionImpl, J
     _connection->send(std::move(method), json ? folly::parseJson(json->toJsonString()) : folly::dynamic::object());
   }
 
+  void reportErrorWithMetadata(
+      const std::string reason,
+      const std::string stackTrace) {
+    _connection->error(reason, stackTrace);
+  }
+
   void reportError(jni::alias_ref<jni::JThrowable> throwable) {
-    _connection->error(throwable->toString(), throwable->getStackTrace()->toString());
+    _connection->error(
+        throwable->toString(), throwable->getStackTrace()->toString());
   }
 
   void receive(const std::string method, jni::alias_ref<JFlipperReceiver> receiver) {

android/src/main/java/com/facebook/flipper/android/FlipperConnectionImpl.java

@@ -44,6 +44,9 @@ class FlipperConnectionImpl implements FlipperConnection {
 
   public native void sendArray(String method, FlipperArray params);
 
+  @Override
+  public native void reportErrorWithMetadata(String reason, String stackTrace);
+
   @Override
   public native void reportError(Throwable throwable);
 

android/src/main/java/com/facebook/flipper/core/ErrorReportingRunnable.java

@@ -7,6 +7,9 @@
  */
 package com.facebook.flipper.core;
 
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
 public abstract class ErrorReportingRunnable implements Runnable {
 
   private final FlipperConnection mConnection;
@@ -21,7 +24,11 @@ public abstract class ErrorReportingRunnable implements Runnable {
       runOrThrow();
     } catch (Exception e) {
       if (mConnection != null) {
-        mConnection.reportError(e);
+        StringWriter sw = new StringWriter();
+        PrintWriter pw = new PrintWriter(sw);
+        e.printStackTrace(pw);
+        String sStackTrace = sw.toString(); // stack trace as a string
+        mConnection.reportErrorWithMetadata(e.toString(), sStackTrace);
       }
     } finally {
       doFinally();

android/src/main/java/com/facebook/flipper/core/FlipperConnection.java

@@ -26,6 +26,9 @@ public interface FlipperConnection {
    */
   void send(String method, FlipperArray params);
 
+  /** Report client error with reason and stacktrace as an argument */
+  void reportErrorWithMetadata(String reason, String stackTrace);
+
   /** Report client error */
   void reportError(Throwable throwable);
 

android/src/main/java/com/facebook/flipper/testing/FlipperConnectionMock.java

@@ -47,6 +47,11 @@ public class FlipperConnectionMock implements FlipperConnection {
     paramList.add(params);
   }
 
+  @Override
+  public void reportErrorWithMetadata(String reason, String stackTrace) {
+    errors.add(new Throwable(reason));
+  }
+
   @Override
   public void reportError(Throwable throwable) {
     errors.add(throwable);

android/src/test/java/com/facebook/flipper/plugins/inspector/InspectorFlipperPluginTest.java

@@ -318,8 +318,11 @@ public class InspectorFlipperPluginTest {
         new FlipperObject.Builder().put("ids", new FlipperArray.Builder().put("test")).build(),
         responder);
 
+    assertThat(connection.errors.size(), equalTo(1));
     assertThat(
-        connection.errors, CoreMatchers.hasItem(hasThrowableWithMessage("Unexpected null value")));
+        connection.errors,
+        CoreMatchers.hasItem(
+            hasThrowableWithMessage("java.lang.RuntimeException: Unexpected null value")));
   }
 
   private class TestNode {