| // 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. |
| // |
| // InitHugepagesAndMlockSelf() 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 "base/feature_list.h" |
| #include "base/metrics/field_trial_params.h" |
| #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 { |
| |
| // A feature which controls remapping the zygotes hot text section as hugepages |
| // and locking. |
| extern const base::Feature kCrOSHugepageRemapAndLockZygote; |
| |
| // This function will scan ELF segments and attempt to do two things: |
| // - Reload some of .text into hugepages |
| // - Lock some of .text into memory, so it can't be swapped out. |
| // |
| // When this function returns, text segments that are naturally aligned on |
| // hugepage size will be backed by hugepages. |
| // |
| // Any and all errors encountered by this function are soft errors; Chrome |
| // should still be able to run. |
| CHROMEOS_EXPORT extern void InitHugepagesAndMlockSelf(void); |
| } // namespace chromeos |
| |
| #endif // CHROMEOS_HUGEPAGE_TEXT_HUGEPAGE_TEXT_H_ |
