| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Author: Ken Chen <kenchen@google.com> |
| // |
| // Library support to remap process executable elf segment with hugepages. |
| // |
| // ReloadElfTextInHugePages() will search for an ELF executable segment, |
| // and remap it using hugepage. |
| |
| #ifndef CHROMEOS_HUGEPAGE_TEXT_HUGEPAGE_TEXT_H_ |
| #define CHROMEOS_HUGEPAGE_TEXT_HUGEPAGE_TEXT_H_ |
| |
| #include <string> |
| #include "chromeos/chromeos_export.h" |
| |
| #if defined(__clang__) || defined(__GNUC__) |
| #define ATTRIBUTE_NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address)) |
| #else |
| #define ATTRIBUTE_NO_SANITIZE_ADDRESS |
| #endif |
| |
| namespace chromeos { |
| |
| // This function will scan ELF |
| // segments and attempt to remap text segment from small page to hugepage. |
| // When this function returns, text segments that are naturally aligned on |
| // hugepage size will be backed by hugepages. In the event of errors, the |
| // remapping operation will be aborted and rolled back, e.g. they are all |
| // soft fail. |
| CHROMEOS_EXPORT extern void ReloadElfTextInHugePages(void); |
| } // namespace chromeos |
| |
| #endif // CHROMEOS_HUGEPAGE_TEXT_HUGEPAGE_TEXT_H_ |
