1 files changed, 21 insertions, 0 deletions
diff --git a/xfa/fxfa/fm2js/cxfa_fmtojavascriptdepth.cpp b/xfa/fxfa/fm2js/cxfa_fmtojavascriptdepth.cpp
new file mode 100644
index 0000000000..6312ba6b3d
--- /dev/null
+++ b/xfa/fxfa/fm2js/cxfa_fmtojavascriptdepth.cpp
@@ -0,0 +1,21 @@
+// Copyright 2017 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "xfa/fxfa/fm2js/cxfa_fmtojavascriptdepth.h"
+
+namespace {
+
+// Arbitarily picked by looking at how deep a translation got before hitting
+// the getting fuzzer memory limits. Should be larger then |kMaxParseDepth| in
+// cxfa_fmparser.cpp.
+const unsigned int kMaxDepth = 5000;
+
+}  // namespace
+
+unsigned long CXFA_FMToJavaScriptDepth::depth_ = 0;
+unsigned long CXFA_FMToJavaScriptDepth::max_depth_ = kMaxDepth;
+
+void CXFA_FMToJavaScriptDepth::Reset() {
+  depth_ = 0;
+}