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Diffstat (limited to 'chromeos/hugepage_text/hugepage_text.h')
| -rw-r--r-- | chromeos/hugepage_text/hugepage_text.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/chromeos/hugepage_text/hugepage_text.h b/chromeos/hugepage_text/hugepage_text.h new file mode 100644 index 0000000..801ac30 --- /dev/null +++ b/chromeos/hugepage_text/hugepage_text.h @@ -0,0 +1,35 @@ +// 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_ |