llvm/compiler-rt/lib/scudo/standalone/wrappers_c_checks.h

//===-- wrappers_c_checks.h -------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef SCUDO_CHECKS_H_
#define SCUDO_CHECKS_H_

#include "common.h"

#include <errno.h>

#ifndef __has_builtin
#define __has_builtin …
#endif

namespace scudo {

// A common errno setting logic shared by almost all Scudo C wrappers.
inline void *setErrnoOnNull(void *Ptr) { … }

// Checks return true on failure.

// Checks aligned_alloc() parameters, verifies that the alignment is a power of
// two and that the size is a multiple of alignment.
inline bool checkAlignedAllocAlignmentAndSize(uptr Alignment, uptr Size) { … }

// Checks posix_memalign() parameters, verifies that alignment is a power of two
// and a multiple of sizeof(void *).
inline bool checkPosixMemalignAlignment(uptr Alignment) { … }

// Returns true if calloc(Size, N) overflows on Size*N calculation. Use a
// builtin supported by recent clang & GCC if it exists, otherwise fallback to a
// costly division.
inline bool checkForCallocOverflow(uptr Size, uptr N, uptr *Product) { … }

// Returns true if the size passed to pvalloc overflows when rounded to the next
// multiple of PageSize.
inline bool checkForPvallocOverflow(uptr Size, uptr PageSize) { … }

} // namespace scudo

#endif // SCUDO_CHECKS_H_