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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/process/memory.h"
#include <string.h>
#include "base/allocator/buildflags.h"
#include "base/cxx17_backports.h"
#include "base/debug/alias.h"
#include "base/immediate_crash.h"
#include "base/logging.h"
#include "build/build_config.h"
#if BUILDFLAG(USE_PARTITION_ALLOC)
#include "base/allocator/partition_allocator/page_allocator.h"
#endif
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#else
#include <unistd.h>
#endif // BUILDFLAG(IS_WIN)
namespace base {
// Defined in memory_mac.mm for macOS + use_allocator="none". In case of
// USE_PARTITION_ALLOC_AS_MALLOC, no need to route the call to the system
// default calloc of macOS.
#if !BUILDFLAG(IS_APPLE) || BUILDFLAG(USE_PARTITION_ALLOC_AS_MALLOC)
bool UncheckedCalloc(size_t num_items, size_t size, void** result) {
const size_t alloc_size = num_items * size;
// Overflow check
if (size && ((alloc_size / size) != num_items)) {
*result = nullptr;
return false;
}
if (!UncheckedMalloc(alloc_size, result))
return false;
memset(*result, 0, alloc_size);
return true;
}
#endif // !BUILDFLAG(IS_APPLE) || BUILDFLAG(USE_PARTITION_ALLOC_AS_MALLOC)
namespace internal {
bool ReleaseAddressSpaceReservation() {
#if BUILDFLAG(USE_PARTITION_ALLOC)
return partition_alloc::ReleaseReservation();
#else
return false;
#endif
}
} // namespace internal
} // namespace base
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