libsanitizer/asan/asan_malloc_local.h

//===-- asan_malloc_local.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
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// Provide interfaces to check for and handle local pool memory allocation.
//===----------------------------------------------------------------------===//

#ifndef ASAN_MALLOC_LOCAL_H
#define ASAN_MALLOC_LOCAL_H

#include "sanitizer_common/sanitizer_platform.h"
#include "asan_internal.h"

static inline bool EarlyMalloc() {
  return SANITIZER_RTEMS &&
         (!__asan::asan_inited || __asan::asan_init_is_running);
}

#if SANITIZER_RTEMS

bool IsFromLocalPool(const void *ptr);
void *MemalignFromLocalPool(uptr alignment, uptr size);

// On RTEMS, we use the local pool to handle memory allocation when the ASan
// run-time is not up. This macro is expanded in the context of the operator new
// implementation.
#define MAYBE_ALLOCATE_FROM_LOCAL_POOL(nothrow)                    \
  do {                                                             \
    if (UNLIKELY(EarlyMalloc())) {                                 \
      void *res = MemalignFromLocalPool(SHADOW_GRANULARITY, size); \
      if (!nothrow)                                                \
        CHECK(res);                                                \
      return res;                                                  \
    }                                                              \
  } while (0)

#define IS_FROM_LOCAL_POOL(ptr) UNLIKELY(IsFromLocalPool(ptr))

#else  // SANITIZER_RTEMS

#define MAYBE_ALLOCATE_FROM_LOCAL_POOL(nothrow)
#define IS_FROM_LOCAL_POOL(ptr) 0

#endif  // SANITIZER_RTEMS

#endif  // ASAN_MALLOC_LOCAL_H