1 files changed, 43 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/scudo/standalone/bytemap.h b/contrib/llvm-project/compiler-rt/lib/scudo/standalone/bytemap.h
new file mode 100644
index 000000000000..248e096d07b6
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/scudo/standalone/bytemap.h
@@ -0,0 +1,43 @@
+//===-- bytemap.h -----------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SCUDO_BYTEMAP_H_
+#define SCUDO_BYTEMAP_H_
+
+#include "atomic_helpers.h"
+#include "common.h"
+#include "mutex.h"
+
+namespace scudo {
+
+template <uptr Size> class FlatByteMap {
+public:
+  void init() { DCHECK(Size == 0 || Map[0] == 0); }
+
+  void unmapTestOnly() { memset(Map, 0, Size); }
+
+  void set(uptr Index, u8 Value) {
+    DCHECK_LT(Index, Size);
+    DCHECK_EQ(0U, Map[Index]);
+    Map[Index] = Value;
+  }
+  u8 operator[](uptr Index) {
+    DCHECK_LT(Index, Size);
+    return Map[Index];
+  }
+
+  void disable() {}
+  void enable() {}
+
+private:
+  u8 Map[Size] = {};
+};
+
+} // namespace scudo
+
+#endif // SCUDO_BYTEMAP_H_