GcInfo: Add support for Standalone build

 The STANDALONE_BUILD switch can be used to build the GcInfoEncoder library
 independently by clients outside the CoreClr tree.

 The GcInfo library uses some custom data-structures (ex: ArrayList)
 and includes some utility libraries (ex: UtilCode) which pull in several other
 headers with considerable unrelated content. Rather than porting all the
 utility code to suite other clients, the  STANDALONE_BUILD switch can be used
 to include only the minimal set of headers specific to GcInfo encodings.

 Clients of STANDALONE_BUILD will likely use standard library
 implementations of data-structures like ArrayList, HashMap etc., in place
 of the custom implementation currently used by GcInfoEncoder.

 Rather than spew the GcInfoEnoder code with
 #ifdef STANDALONE_BUILD ... #else .. #endif blocks, we include a special
 header GcInfoUtil.h in STANDALONE_BUILD mode.  GcInfoUtil.h is expected to
 supply the interface/implementation for the data-structures and utilities
 used by GcInfoEncoder. This header should be provided by the clients doing
 the standalone build in their source tree.

7 files changed, 48 insertions, 8 deletions

diff --git a/src/.nuget/Microsoft.DotNet.CoreCLR.Debug.Development.nuspec b/src/.nuget/Microsoft.DotNet.CoreCLR.Debug.Development.nuspec
index 7cedd34318..4fbbdf5791 100644
--- a/src/.nuget/Microsoft.DotNet.CoreCLR.Debug.Development.nuspec
+++ b/src/.nuget/Microsoft.DotNet.CoreCLR.Debug.Development.nuspec
@@ -40,6 +40,9 @@
     <file src="..\inc\corinfo.h" target="inc\corinfo.h" />
     <file src="..\inc\corjit.h" target="inc\corjit.h" />
     <file src="..\inc\opcode.def" target="inc\opcode.def" />
-    <file src="..\inc\openum.h" target="inc\openum.h" />
+    <file src="..\inc\openum.h" target="inc\openum.h" />	
+    <file src="..\inc\gcinfoencoder.h" target="inc\gcinfoencoder.h" />
+    <file src="..\inc\gcinfotypes.h" target="inc\gcinfotypes.h" />
+    <file src="..\gcinfo\gcinfoencoder.cpp" target="gcinfo\gcinfoencoder.cpp" />
   </files>
 </package>
diff --git a/src/.nuget/Microsoft.DotNet.CoreCLR.Development.nuspec b/src/.nuget/Microsoft.DotNet.CoreCLR.Development.nuspec
index 0f9a7d052b..fe3a59f472 100644
--- a/src/.nuget/Microsoft.DotNet.CoreCLR.Development.nuspec
+++ b/src/.nuget/Microsoft.DotNet.CoreCLR.Development.nuspec
@@ -41,5 +41,8 @@
     <file src="..\inc\corjit.h" target="inc\corjit.h" />
     <file src="..\inc\opcode.def" target="inc\opcode.def" />
     <file src="..\inc\openum.h" target="inc\openum.h" />
+    <file src="..\inc\gcinfoencoder.h" target="inc\gcinfoencoder.h" />
+    <file src="..\inc\gcinfotypes.h" target="inc\gcinfotypes.h" />
+    <file src="..\.\gcinfo\gcinfoencoder.cpp" target="gcinfo\gcinfoencoder.cpp" />	
   </files>
 </package>
diff --git a/src/gcinfo/CMakeLists.txt b/src/gcinfo/CMakeLists.txt
index 47789d8ccb..0093815b8a 100644
--- a/src/gcinfo/CMakeLists.txt
+++ b/src/gcinfo/CMakeLists.txt
@@ -14,3 +14,6 @@ endif(CLR_CMAKE_PLATFORM_UNIX)
 
 add_subdirectory(lib)
 add_subdirectory(crossgen)
+
+install (FILES gcinfoencoder.cpp
+               DESTINATION gcinfo)
diff --git a/src/gcinfo/gcinfoencoder.cpp b/src/gcinfo/gcinfoencoder.cpp
index f9d6ebb4a1..8f3fe9508e 100644
--- a/src/gcinfo/gcinfoencoder.cpp
+++ b/src/gcinfo/gcinfoencoder.cpp
@@ -20,8 +20,11 @@
         #define LOGGING
     #endif
 #endif
+
+#ifndef STANDALONE_BUILD
 #include "log.h"
 #include "simplerhash.h"
+#endif
 
 #ifdef MDIL
 #define MUST_CALL_JITALLOCATOR_FREE 1
@@ -84,7 +87,7 @@ void GcInfoSize::Log(DWORD level, const char * header)
 
 #endif
 
-
+#ifndef DISABLE_EH_VECTORS
 inline BOOL IsEssential(EE_ILEXCEPTION_CLAUSE *pClause)
 {
     _ASSERTE(pClause->TryEndPC >= pClause->TryStartPC);
@@ -93,6 +96,7 @@ inline BOOL IsEssential(EE_ILEXCEPTION_CLAUSE *pClause)
 
      return TRUE;
 }
+#endif
 
 GcInfoEncoder::GcInfoEncoder(
             ICorJitInfo*                pCorJitInfo,
diff --git a/src/inc/CMakeLists.txt b/src/inc/CMakeLists.txt
index be7f6d4329..6f4a1880c0 100644
--- a/src/inc/CMakeLists.txt
+++ b/src/inc/CMakeLists.txt
@@ -74,4 +74,6 @@ install (FILES cor.h
                corjit.h
                opcode.def
                openum.h
+               gcinfoencoder.h
+               gcinfotypes.h
                DESTINATION inc)
diff --git a/src/inc/gcinfoencoder.h b/src/inc/gcinfoencoder.h
index 9987d67be1..ea9c295df0 100644
--- a/src/inc/gcinfoencoder.h
+++ b/src/inc/gcinfoencoder.h
@@ -41,28 +41,54 @@
  7. Chunk pointers
  8. Chunk encodings
  
+
+ STANDALONE_BUILD
+
+ The STANDALONE_BUILD switch can be used to build the GcInfoEncoder library 
+ independently by clients outside the CoreClr tree.
+
+ The GcInfo library uses some custom data-structures (ex: ArrayList, SimplerHashTable)
+ and includes some utility libraries (ex: UtilCode) which pull in several other 
+ headers with considerable unrelated content. Rather than porting all the 
+ utility code to suite other clients, the  STANDALONE_BUILD switch can be used 
+ to include only the minimal set of headers specific to GcInfo encodings.
+
+ Clients of STANDALONE_BUILD will likely use standard library
+ implementations of data-structures like ArrayList, HashMap etc., in place
+ of the custom implementation currently used by GcInfoEncoder.
+
+ Rather than spew the GcInfoEnoder code with
+ #ifdef STANDALONE_BUILD ... #else .. #endif blocks, we include a special
+ header GcInfoUtil.h in STANDALONE_BUILD mode.  GcInfoUtil.h is expected to 
+ supply the interface/implementation for the data-structures and utilities 
+ used by GcInfoEncoder. This header should be provided by the clients doing 
+ the standalone build in their source tree.
+
 *****************************************************************/
 
 
 #ifndef __GCINFOENCODER_H__
 #define __GCINFOENCODER_H__
 
-
+#ifdef STANDALONE_BUILD
+#include <wchar.h>
+#include <stdio.h>
+#include "GcInfoUtil.h"  
+#include "corjit.h"
+#else
 #include <windows.h>
-
 #include <wchar.h>
 #include <stdio.h>
-
 #include "utilcode.h"
 #include "corjit.h"
 #include "slist.h"     // for SList
 #include "arraylist.h"
 #include "iallocator.h"
-
 #include "stdmacros.h"
-#include "gcinfotypes.h"
 #include "eexcp.h"
+#endif
 
+#include "gcinfotypes.h"
 
 #ifdef VERIFY_GCINFO
 #include "dbggcinfoencoder.h"
diff --git a/src/inc/gcinfotypes.h b/src/inc/gcinfotypes.h
index 7852f8687f..7334edd680 100644
--- a/src/inc/gcinfotypes.h
+++ b/src/inc/gcinfotypes.h
@@ -62,7 +62,6 @@
 //--------------------------------------------------------------------------------
 __forceinline size_t SAFE_SHIFT_LEFT(size_t x, size_t count)
 {
-    LIMITED_METHOD_DAC_CONTRACT;
     _ASSERTE(count <= BITS_PER_SIZE_T);
     return (x << 1) << (count-1);
 }