--- /dev/null
+++ dyld/dyld-1340/common/JSONWriter.h
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2017 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef __JSON_WRITER_H__
+#define __JSON_WRITER_H__
+
+#include <iostream>
+
+#include "JSON.h"
+
+namespace json {
+
+static inline std::string hex(uint64_t value) {
+    char buff[64];
+    snprintf(buff, sizeof(buff), "0x%llX", value);
+    return buff;
+}
+
+static inline std::string hex4(uint64_t value) {
+    char buff[64];
+    snprintf(buff, sizeof(buff), "0x%04llX", value);
+    return buff;
+}
+
+static inline std::string hex8(uint64_t value) {
+    char buff[64];
+    snprintf(buff, sizeof(buff), "0x%08llX", value);
+    return buff;
+}
+
+static inline std::string unpaddedDecimal(uint64_t value) {
+    char buff[64];
+    snprintf(buff, sizeof(buff), "%llu", value);
+    return buff;
+}
+
+static inline std::string decimal(uint64_t value) {
+    char buff[64];
+    snprintf(buff, sizeof(buff), "%02llu", value);
+    return buff;
+}
+
+static inline void indentBy(uint32_t spaces, std::ostream& out) {
+    for (uint32_t i=0; i < spaces; ++i) {
+        out << " ";
+    }
+}
+
+static inline void printJSON(const Node& node, uint32_t indent = 0, std::ostream& out = std::cout)
+{
+    if ( !node.map.empty() ) {
+        out << "{";
+        bool needComma = false;
+        for (const auto& entry : node.map) {
+            if ( needComma )
+                out << ",";
+            out << "\n";
+            indentBy(indent+2, out);
+            out << "\"" << entry.first << "\": ";
+            printJSON(entry.second, indent+2, out);
+            needComma = true;
+        }
+        out << "\n";
+        indentBy(indent, out);
+        out << "}";
+    }
+    else if ( !node.array.empty() ) {
+        out << "[";
+        bool needComma = false;
+        for (const auto& entry : node.array) {
+            if ( needComma )
+                out << ",";
+            out << "\n";
+            indentBy(indent+2, out);
+            printJSON(entry, indent+2, out);
+            needComma = true;
+        }
+        out << "\n";
+        indentBy(indent, out);
+        out << "]";
+    }
+    else {
+        auto &value = node.value;
+        switch (node.type) {
+        case NodeValueType::Default:
+        case NodeValueType::String:
+            if (value.find('"') == std::string::npos) {
+                out << "\"" << value << "\"";
+            } else {
+                std::string escapedString;
+                escapedString.reserve(value.size());
+                for (char c : value) {
+                    if (c == '"')
+                        escapedString += '\\';
+                    escapedString += c;
+                }
+                out << "\"" << escapedString << "\"";
+            }
+            break;
+        case NodeValueType::RawValue:
+            out << value;
+            break;
+        case NodeValueType::Array:
+        case NodeValueType::Map:
+            // handled earlier
+            break;
+        }
+    }
+    if ( indent == 0 )
+        out << "\n";
+}
+
+static inline void streamArrayBegin(bool &needsComma, std::ostream& out = std::cout)
+{
+    out << "[";
+    needsComma = false;
+}
+
+static inline void streamArrayNode(bool &needsComma, Node &node, std::ostream& out = std::cout)
+{
+    if (needsComma)
+        out << ",";
+    out << "\n";
+    indentBy(2, out);
+    printJSON(node, 2, out);
+    needsComma = true;
+}
+
+static inline void streamArrayEnd(bool &needsComma, std::ostream& out = std::cout)
+{
+    if (needsComma)
+        out << "\n";
+    out << "]\n";
+}
+
+} // namespace json
+
+
+#endif // __JSON_WRITER_H__