2 files changed, 35 insertions, 5 deletions
diff --git a/indra/llcommon/llerror.cpp b/indra/llcommon/llerror.cpp
index 9b0141eb76..d2af004cde 100755
--- a/indra/llcommon/llerror.cpp
+++ b/indra/llcommon/llerror.cpp
@@ -201,10 +201,7 @@ namespace {
 		virtual void recordMessage(LLError::ELevel level,
 								   const std::string& message)
 		{
-			llutf16string utf16str =
-				wstring_to_utf16str(utf8str_to_wstring(message));
-			utf16str += '\n';
-			OutputDebugString(utf16str.c_str());
+			LL_WINDOWS_OUTPUT_DEBUG(message);
 		}
 	};
 #endif
@@ -1401,5 +1398,27 @@ namespace LLError
    {
        sIndex = 0 ;
    }
+
+#if LL_WINDOWS
+	void LLOutputDebugUTF8(const std::string& s)
+	{
+		// Be careful when calling OutputDebugString as it throws DBG_PRINTEXCEPTION_C 
+		// which works just fine under the windows debugger, but can cause users who
+		// have enabled SEHOP exception chain validation to crash due to interactions
+		// between the Win 32-bit exception handling and boost coroutine fiber stacks. BUG-2707
+		//
+		if (IsDebuggerPresent())
+		{
+			// Need UTF16 for Unicode OutputDebugString
+			//
+			if (s.size())
+			{
+				OutputDebugString(utf8str_to_utf16str(s).c_str());
+				OutputDebugString(TEXT("\n"));
+			}
+		}
+	}
+#endif
+
 }
 
diff --git a/indra/llcommon/llerror.h b/indra/llcommon/llerror.h
index b65b410153..0b723aeb5d 100755
--- a/indra/llcommon/llerror.h
+++ b/indra/llcommon/llerror.h
@@ -34,7 +34,6 @@
 #include "llerrorlegacy.h"
 #include "stdtypes.h"
 
-
 /** Error Logging Facility
 
 	Information for most users:
@@ -199,8 +198,20 @@ namespace LLError
        static void clear() ;
 	   static void end(std::ostringstream* _out) ;
    }; 
+
+#if LL_WINDOWS
+	void LLOutputDebugUTF8(const std::string& s);
+#endif
+
 }
 
+#if LL_WINDOWS
+	// Macro accepting a std::string for display in windows debugging console
+	#define LL_WINDOWS_OUTPUT_DEBUG(a) LLError::LLOutputDebugUTF8(a)
+#else
+	#define LL_WINDOWS_OUTPUT_DEBUG(a)
+#endif
+
 //this is cheaper than llcallstacks if no need to output other variables to call stacks. 
 #define llpushcallstacks LLError::LLCallStacks::push(__FUNCTION__, __LINE__)
 #define llcallstacks \