chromium/base/allocator/partition_allocator/src/partition_alloc/thread_isolation/thread_isolation.h

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef PARTITION_ALLOC_THREAD_ISOLATION_THREAD_ISOLATION_H_
#define PARTITION_ALLOC_THREAD_ISOLATION_THREAD_ISOLATION_H_

#include "partition_alloc/buildflags.h"

#if PA_BUILDFLAG(ENABLE_THREAD_ISOLATION)

#include <cstddef>
#include <cstdint>

#include "partition_alloc/buildflags.h"
#include "partition_alloc/partition_alloc_base/component_export.h"

#if PA_BUILDFLAG(ENABLE_PKEYS)
#include "partition_alloc/thread_isolation/pkey.h"
#endif

#if !PA_BUILDFLAG(HAS_64_BIT_POINTERS)
#error "thread isolation support requires 64 bit pointers"
#endif

namespace partition_alloc {

struct ThreadIsolationOption { … };

}  // namespace partition_alloc

namespace partition_alloc::internal {

#if PA_BUILDFLAG(DCHECKS_ARE_ON)

struct PA_THREAD_ISOLATED_ALIGN ThreadIsolationSettings { … };

#if PA_BUILDFLAG(ENABLE_PKEYS)

LiftThreadIsolationScope;

#endif  // PA_BUILDFLAG(ENABLE_PKEYS)
#endif  // PA_BUILDFLAG(DCHECKS_ARE_ON)

void WriteProtectThreadIsolatedGlobals(ThreadIsolationOption thread_isolation);
void UnprotectThreadIsolatedGlobals();
[[nodiscard]] int MprotectWithThreadIsolation(
    void* addr,
    size_t len,
    int prot,
    ThreadIsolationOption thread_isolation);

}  // namespace partition_alloc::internal

#endif  // PA_BUILDFLAG(ENABLE_THREAD_ISOLATION)

#endif  // PARTITION_ALLOC_THREAD_ISOLATION_THREAD_ISOLATION_H_