Function GetExceptionSummary

exceptions/app/src/main/cpp/exception_helper.cpp:56–102

* Returns a human-readable summary of an exception object. The buffer will * be populated with the "binary" class name and, if present, the * exception message. */

 * exception message.
 */
static bool GetExceptionSummary(JNIEnv* env, jthrowable thrown,
                                std::string* dst) {
  // Summary is <exception_class_name> ": " <exception_message>
  jclass exceptionClass = env->GetObjectClass(thrown);  // Always succeeds
  jmethodID getName =
      FindMethod(env, "java/lang/Class", "getName", "()Ljava/lang/String;");
  jstring className = (jstring)env->CallObjectMethod(exceptionClass, getName);
  if (className == NULL) {
    *dst = "<error getting class name>";
    env->ExceptionClear();
    env->DeleteLocalRef(exceptionClass);
    return false;
  }
  env->DeleteLocalRef(exceptionClass);
  exceptionClass = NULL;
  if (!AppendJString(env, className, dst)) {
    *dst = "<error getting class name UTF-8>";
    env->ExceptionClear();
    env->DeleteLocalRef(className);
    return false;
  }
  env->DeleteLocalRef(className);
  className = NULL;
  jmethodID getMessage = FindMethod(env, "java/lang/Throwable", "getMessage",
                                    "()Ljava/lang/String;");
  jstring message = (jstring)env->CallObjectMethod(thrown, getMessage);
  if (message == NULL) {
    return true;
  }
  dst->append(": ");
  bool success = AppendJString(env, message, dst);
  if (!success) {
    // Two potential reasons for reaching here:
    //
    // 1. managed heap allocation failure (OOME).
    // 2. native heap allocation failure for the storage in |dst|.
    //
    // Attempt to append failure notification, okay to fail, |dst| contains the
    // class name of |thrown|.
    dst->append("<error getting message>");
    // Clear OOME if present.
    env->ExceptionClear();
  }
  env->DeleteLocalRef(message);
  message = NULL;
  return success;
}

static jstring CreateExceptionMsg(JNIEnv* env, const char* msg) {
  jstring detailMessage = env->NewStringUTF(msg);