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
13namespace scudo {
14
15#if !defined(SCUDO_PAGE_SIZE)
16uptr PageSizeCached = 0;
17uptr PageSizeLogCached = 0;
18
19// Must be defined in platform specific code.
20uptr 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.
24uptr 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