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-rw-r--r--src/unwind_ext.h37
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+//===-------------------------- unwind_ext.h ------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//
+// Extensions to unwind API.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef __UNWIND_EXT__
+#define __UNWIND_EXT__
+
+#include "unwind.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// These platform specific functions to get and set the top context are
+// implemented elsewhere.
+
+extern struct _Unwind_FunctionContext *
+__Unwind_SjLj_GetTopOfFunctionStack();
+
+extern void
+__Unwind_SjLj_SetTopOfFunctionStack(struct _Unwind_FunctionContext *fc);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // __UNWIND_EXT__
+
+