1 files changed, 59 insertions, 0 deletions
diff --git a/compiler-rt/lib/scudo/scudo_utils.h b/compiler-rt/lib/scudo/scudo_utils.h
new file mode 100644
index 00000000000..07394ff4b91
--- /dev/null
+++ b/compiler-rt/lib/scudo/scudo_utils.h
@@ -0,0 +1,59 @@
+//===-- scudo_utils.h -------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// Header for scudo_utils.cpp.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef SCUDO_UTILS_H_
+#define SCUDO_UTILS_H_
+
+#include <string.h>
+
+#include "sanitizer_common/sanitizer_common.h"
+
+namespace __scudo {
+
+template <class Dest, class Source>
+inline Dest bit_cast(const Source& source) {
+  static_assert(sizeof(Dest) == sizeof(Source), "Sizes are not equal!");
+  Dest dest;
+  memcpy(&dest, &source, sizeof(dest));
+  return dest;
+}
+
+void dieWithMessage(const char *Format, ...);
+
+enum  CPUFeature {
+  SSE4_2 = 0,
+  ENUM_CPUFEATURE_MAX
+};
+bool testCPUFeature(CPUFeature feature);
+
+// Tiny PRNG based on https://en.wikipedia.org/wiki/Xorshift#xorshift.2B
+// The state (128 bits) will be stored in thread local storage.
+struct Xorshift128Plus {
+ public:
+  Xorshift128Plus();
+  u64 Next() {
+    u64 x = State_0_;
+    const u64 y = State_1_;
+    State_0_ = y;
+    x ^= x << 23;
+    State_1_ = x ^ y ^ (x >> 17) ^ (y >> 26);
+    return State_1_ + y;
+  }
+ private:
+  u64 State_0_;
+  u64 State_1_;
+};
+
+} // namespace __scudo
+
+#endif  // SCUDO_UTILS_H_