| 1 | //===-- common.cpp ----------------------------------------------*- C++ -*-===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "common.h" |
| 10 | #include "atomic_helpers.h" |
| 11 | #include "string_utils.h" |
| 12 | |
| 13 | namespace scudo { |
| 14 | |
| 15 | #if !defined(SCUDO_PAGE_SIZE) |
| 16 | uptr PageSizeCached = 0; |
| 17 | uptr PageSizeLogCached = 0; |
| 18 | |
| 19 | // Must be defined in platform specific code. |
| 20 | uptr getPageSize(); |
| 21 | |
| 22 | // This must be called in the init path or there could be a race if multiple |
| 23 | // threads try to set the cached values. |
| 24 | uptr getPageSizeSlow() { |
| 25 | PageSizeCached = getPageSize(); |
| 26 | CHECK_NE(PageSizeCached, 0); |
| 27 | PageSizeLogCached = getLog2(X: PageSizeCached); |
| 28 | return PageSizeCached; |
| 29 | } |
| 30 | #endif |
| 31 | |
| 32 | } // namespace scudo |
| 33 |