1 files changed, 119 insertions, 0 deletions
diff --git a/src/coreclr/utilcode/format1.cpp b/src/coreclr/utilcode/format1.cpp
new file mode 100644
index 00000000000..f8ef94406bf
--- /dev/null
+++ b/src/coreclr/utilcode/format1.cpp
@@ -0,0 +1,119 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+/***************************************************************************/
+/* routines for parsing file format stuff ... */
+/* this is split off from format.cpp because this uses meta-data APIs that
+   are not present in many builds.  Thus if someone needs things in the format.cpp
+   file but does not have the meta-data APIs, I want it to link */
+
+#include "stdafx.h"
+#include "cor.h"
+#include "corpriv.h"
+
+//---------------------------------------------------------------------------------------
+//
+static LONG FilterAllExceptions(PEXCEPTION_POINTERS pExceptionPointers, LPVOID lpvParam)
+{
+    if ((pExceptionPointers->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) ||
+        (pExceptionPointers->ExceptionRecord->ExceptionCode == EXCEPTION_ARRAY_BOUNDS_EXCEEDED) ||
+        (pExceptionPointers->ExceptionRecord->ExceptionCode == EXCEPTION_IN_PAGE_ERROR))
+        return EXCEPTION_EXECUTE_HANDLER;
+
+    return EXCEPTION_CONTINUE_SEARCH;
+}
+
+//---------------------------------------------------------------------------------------
+//
+COR_ILMETHOD_DECODER::COR_ILMETHOD_DECODER(
+    COR_ILMETHOD *  header,
+    void *          pInternalImport,
+    DecoderStatus * wbStatus)
+{
+    STATIC_CONTRACT_NOTHROW;
+    STATIC_CONTRACT_FORBID_FAULT;
+
+    // Can't put contract because of SEH
+    // CONTRACTL
+    // {
+    //    NOTHROW;
+    //    GC_NOTRIGGER;
+    //    FORBID_FAULT;
+    // }
+    // CONTRACTL_END
+
+    bool fErrorInInit = false;
+    struct Param
+    {
+        COR_ILMETHOD_DECODER * pThis;
+        COR_ILMETHOD * header;
+    } param;
+    param.pThis = this;
+    param.header = header;
+
+    PAL_TRY(Param *, pParam, &param)
+    {
+        // Decode the COR header into a more convenient form
+        DecoderInit(pParam->pThis, pParam->header);
+    }
+    PAL_EXCEPT_FILTER(FilterAllExceptions)
+    {
+        fErrorInInit = true;
+        Code = 0;
+        SetLocalVarSigTok(0);
+        if (wbStatus != NULL)
+        {
+            *wbStatus = FORMAT_ERROR;
+        }
+    }
+    PAL_ENDTRY
+
+    if (fErrorInInit)
+    {
+        return;
+    }
+
+    // If there is a local variable sig, fetch it into 'LocalVarSig'
+    if ((GetLocalVarSigTok() != 0) && (pInternalImport != NULL))
+    {
+        IMDInternalImport * pMDI = reinterpret_cast<IMDInternalImport *>(pInternalImport);
+
+        if (wbStatus != NULL)
+        {
+            if ((!pMDI->IsValidToken(GetLocalVarSigTok())) ||
+                (TypeFromToken(GetLocalVarSigTok()) != mdtSignature) ||
+                (RidFromToken(GetLocalVarSigTok()) == 0))
+            {
+                *wbStatus = FORMAT_ERROR;         // failure bad local variable signature token
+                return;
+            }
+        }
+
+        if (FAILED(pMDI->GetSigFromToken(GetLocalVarSigTok(), &cbLocalVarSig, &LocalVarSig)))
+        {
+            // Failure bad local variable signature token
+            if (wbStatus != NULL)
+            {
+                *wbStatus = FORMAT_ERROR;
+            }
+            LocalVarSig = NULL;
+            cbLocalVarSig = 0;
+            return;
+        }
+
+        if (wbStatus != NULL)
+        {
+            if (FAILED(validateTokenSig(GetLocalVarSigTok(), LocalVarSig, cbLocalVarSig, 0, pMDI)) ||
+                (*LocalVarSig != IMAGE_CEE_CS_CALLCONV_LOCAL_SIG))
+            {
+                *wbStatus = VERIFICATION_ERROR;   // failure validating local variable signature
+                return;
+            }
+        }
+    }
+
+    if (wbStatus != NULL)
+    {
+        *wbStatus = SUCCESS;
+    }
+} // COR_ILMETHOD_DECODER::COR_ILMETHOD_DECODER