1 files changed, 19 insertions, 4 deletions
diff --git a/lib/fuzzer/FuzzerUtil.h b/lib/fuzzer/FuzzerUtil.h
index d2f1d5de4267d..0a127911df3cc 100644
--- a/lib/fuzzer/FuzzerUtil.h
+++ b/lib/fuzzer/FuzzerUtil.h
@@ -1,9 +1,8 @@
 //===- FuzzerUtil.h - Internal header for the Fuzzer Utils ------*- C++ -* ===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 // Util functions.
@@ -53,6 +52,8 @@ void SetSignalHandler(const FuzzingOptions& Options);
 
 void SleepSeconds(int Seconds);
 
+bool Mprotect(void *Ptr, size_t Size, bool AllowReadWrite);
+
 unsigned long GetPid();
 
 size_t GetPeakRSSMb();
@@ -88,6 +89,20 @@ size_t SimpleFastHash(const uint8_t *Data, size_t Size);
 
 inline uint32_t Log(uint32_t X) { return 32 - Clz(X) - 1; }
 
+inline size_t PageSize() { return 4096; }
+inline uint8_t *RoundUpByPage(uint8_t *P) {
+  uintptr_t X = reinterpret_cast<uintptr_t>(P);
+  size_t Mask = PageSize() - 1;
+  X = (X + Mask) & ~Mask;
+  return reinterpret_cast<uint8_t *>(X);
+}
+inline uint8_t *RoundDownByPage(uint8_t *P) {
+  uintptr_t X = reinterpret_cast<uintptr_t>(P);
+  size_t Mask = PageSize() - 1;
+  X = X & ~Mask;
+  return reinterpret_cast<uint8_t *>(X);
+}
+
 }  // namespace fuzzer
 
 #endif  // LLVM_FUZZER_UTIL_H