Provide a counter for thrown JavaScript errors per context

src/contexts.cc

Index: src/contexts.cc
diff --git a/src/contexts.cc b/src/contexts.cc
index a18f181bef8ccb3e0ca80d43dc5a1f3107105d73..f43e579138a9bc89fedf35c0c95a18038cb18063 100644
--- a/src/contexts.cc
+++ b/src/contexts.cc
@@ -589,5 +589,17 @@ bool Context::IsBootstrappingOrGlobalObject(Isolate* isolate, Object* object) {
 }
 #endif
 

[Michael Starzinger, 2015/10/30 12:27:10]

nit: Two empty newlines between top-level declarations.

[Michael Hablich, 2015/10/30 15:55:03]

Done.

+void Context::IncrementExceptionsThrown() {
+  DCHECK(IsNativeContext());
+
+  int previous_value = Smi::cast(exceptions_thrown())->value();
+  set_exceptions_thrown(Smi::FromInt(previous_value+1));
+}
+
+
+int Context::GetExceptionsThrown() {
+  return Smi::cast(exceptions_thrown())->value();
+}
+
 }  // namespace internal
 }  // namespace v8