1 files changed, 80 insertions, 0 deletions
diff --git a/src/gcdump/gcdump.cpp b/src/gcdump/gcdump.cpp
new file mode 100644
index 0000000000..1c512c88e0
--- /dev/null
+++ b/src/gcdump/gcdump.cpp
@@ -0,0 +1,80 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+/*****************************************************************************
+ *                                  GCDump.cpp
+ *
+ * Defines functions to display the GCInfo as defined by the GC-encoding 
+ * spec. The GC information may be either dynamically created by a 
+ * Just-In-Time compiler conforming to the standard code-manager spec,
+ * or may be persisted by a managed native code compiler conforming
+ * to the standard code-manager spec.
+ */
+
+#include "utilcode.h"           // For _ASSERTE()
+#include "gcdump.h"
+
+/*****************************************************************************/
+
+
+
+GCDump::GCDump(UINT32 gcInfoVer, bool encBytes, unsigned maxEncBytes, bool dumpCodeOffs)
+  : gcInfoVersion   (gcInfoVer),
+    fDumpEncBytes   (encBytes    ), 
+    cMaxEncBytes    (maxEncBytes ), 
+    fDumpCodeOffsets(dumpCodeOffs)
+{
+    // By default, use the standard printf function to dump 
+    GCDump::gcPrintf = (printfFtn) ::printf;
+}
+
+/*****************************************************************************
+ *
+ *  Display the byte encodings for the given range of the GC tables.
+ */
+
+PTR_CBYTE GCDump::DumpEncoding(PTR_CBYTE gcInfoBlock, int cDumpBytes)
+{
+    _ASSERTE((cDumpBytes >= 0) && (cMaxEncBytes < 256));
+
+    if  (fDumpEncBytes)
+    {
+        PTR_CBYTE       pCurPos;
+        unsigned        count;
+        int             cBytesLeft;
+
+        for (count = cMaxEncBytes, cBytesLeft = cDumpBytes, pCurPos = gcInfoBlock;
+             count > 0; 
+             count--, pCurPos++, cBytesLeft--)
+        {
+            if  (cBytesLeft > 0)
+            {
+                if  (cBytesLeft > 1 && count == 1)
+                    gcPrintf("...");
+                else
+                    gcPrintf("%02X ", *pCurPos);
+            }
+            else
+                gcPrintf("   ");
+        }
+
+        gcPrintf("| ");
+    }
+
+    return  gcInfoBlock + cDumpBytes;
+}
+
+/*****************************************************************************/
+
+void                GCDump::DumpOffset(unsigned o)
+{
+    gcPrintf("%04X", o);
+}
+
+void                GCDump::DumpOffsetEx(unsigned o)
+{
+    if (fDumpCodeOffsets) 
+        DumpOffset(o);
+}
+
+/*****************************************************************************/