Reland: Add more API fuzzing and fix the issues encountered.

runtime/bin/dartutils.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/dartutils.h"
 
 #include "bin/file.h"
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/globals.h"
@@ skipping 35 matching lines @@
 
 int64_t DartUtils::GetIntegerValue(Dart_Handle value_obj) {
   ASSERT(Dart_IsInteger(value_obj));
   int64_t value = 0;
   Dart_Handle result = Dart_IntegerToInt64(value_obj, &value);
   ASSERT(!Dart_IsError(result));
   return value;
 }
 
 
+bool DartUtils::GetInt64Value(Dart_Handle value_obj, int64_t* value) {
+  bool valid = Dart_IsInteger(value_obj);
+  if (valid) {
+    Dart_Handle result = Dart_IntegerFitsIntoInt64(value_obj, &valid);
+    ASSERT(!Dart_IsError(result));
+  }
+  if (!valid) return false;
+  Dart_Handle result = Dart_IntegerToInt64(value_obj, value);
+  ASSERT(!Dart_IsError(result));
+  return true;
+}
+
+
 const char* DartUtils::GetStringValue(Dart_Handle str_obj) {
   const char* cstring = NULL;
   Dart_Handle result = Dart_StringToCString(str_obj, &cstring);
   ASSERT(!Dart_IsError(result));
   return cstring;
 }
 
 
 bool DartUtils::GetBooleanValue(Dart_Handle bool_obj) {
   bool value = false;
@@ skipping 373 matching lines @@
 
 CObject* CObject::NewOSError(OSError* os_error) {
   CObject* error_message =
       new CObjectString(CObject::NewString(os_error->message()));
   CObjectArray* result = new CObjectArray(CObject::NewArray(3));
   result->SetAt(0, new CObjectInt32(CObject::NewInt32(kOSError)));
   result->SetAt(1, new CObjectInt32(CObject::NewInt32(os_error->code())));
   result->SetAt(2, error_message);
   return result;
 }