Provide a means for CrashRecovery clients to determine if code is currently running while crash recovery cleanups are being processed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128008 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/CrashRecoveryContext.h

@@ -63,6 +63,10 @@ public:
   /// thread which is in a protected context.
   static CrashRecoveryContext *GetCurrent();
 
+  /// \brief Return true if the current thread is recovering from a
+  /// crash.
+  static bool isRecoveringFromCrash();
+
   /// \brief Execute the provide callback function (with the given arguments) in
   /// a protected context.
   ///