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// 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 BASE_ALLOCATOR_DISPATCHER_NOTIFICATION_DATA_H_
#define BASE_ALLOCATOR_DISPATCHER_NOTIFICATION_DATA_H_
#include <cstdint>
#include "base/allocator/dispatcher/memory_tagging.h"
#include "base/allocator/dispatcher/subsystem.h"
#include "base/base_export.h"
#include "partition_alloc/partition_alloc_buildflags.h"
namespace base::allocator::dispatcher {
// Definitions of the parameter structures passed to the observer hooks. They
// are similar to the structures defined by PartitionAllocator but provide
// further information.
// The notification data for the allocation path.
class BASE_EXPORT AllocationNotificationData {
public:
constexpr AllocationNotificationData(void* address,
size_t size,
const char* type_name,
AllocationSubsystem allocation_subsystem)
: address_(address),
size_(size),
type_name_(type_name),
allocation_subsystem_(allocation_subsystem) {}
constexpr void* address() const { return address_; }
constexpr size_t size() const { return size_; }
constexpr const char* type_name() const { return type_name_; }
constexpr AllocationSubsystem allocation_subsystem() const {
return allocation_subsystem_;
}
// In the allocation observer path, it's interesting which reporting mode is
// enabled.
#if BUILDFLAG(HAS_MEMORY_TAGGING)
constexpr AllocationNotificationData& SetMteReportingMode(MTEMode mode) {
mte_reporting_mode_ = mode;
return *this;
}
#endif // BUILDFLAG(HAS_MEMORY_TAGGING)
constexpr MTEMode mte_reporting_mode() const {
#if BUILDFLAG(HAS_MEMORY_TAGGING)
return mte_reporting_mode_;
#else
return MTEMode::kUndefined;
#endif // BUILDFLAG(HAS_MEMORY_TAGGING)
}
private:
void* address_ = nullptr;
size_t size_ = 0;
const char* type_name_ = nullptr;
#if BUILDFLAG(HAS_MEMORY_TAGGING)
MTEMode mte_reporting_mode_ = MTEMode::kUndefined;
#endif // BUILDFLAG(HAS_MEMORY_TAGGING)
AllocationSubsystem allocation_subsystem_;
};
// The notification data for the free path.
class BASE_EXPORT FreeNotificationData {
public:
constexpr explicit FreeNotificationData(
void* address,
AllocationSubsystem allocation_subsystem)
: address_(address), allocation_subsystem_(allocation_subsystem) {}
constexpr void* address() const { return address_; }
constexpr AllocationSubsystem allocation_subsystem() const {
return allocation_subsystem_;
}
// In the free observer path, it's interesting which reporting mode is
// enabled.
#if BUILDFLAG(HAS_MEMORY_TAGGING)
constexpr FreeNotificationData& SetMteReportingMode(MTEMode mode) {
mte_reporting_mode_ = mode;
return *this;
}
#endif // BUILDFLAG(HAS_MEMORY_TAGGING)
constexpr MTEMode mte_reporting_mode() const {
#if BUILDFLAG(HAS_MEMORY_TAGGING)
return mte_reporting_mode_;
#else
return MTEMode::kUndefined;
#endif // BUILDFLAG(HAS_MEMORY_TAGGING)
}
private:
void* address_ = nullptr;
#if BUILDFLAG(HAS_MEMORY_TAGGING)
MTEMode mte_reporting_mode_ = MTEMode::kUndefined;
#endif // BUILDFLAG(HAS_MEMORY_TAGGING)
AllocationSubsystem allocation_subsystem_;
};
} // namespace base::allocator::dispatcher
#endif // BASE_ALLOCATOR_DISPATCHER_NOTIFICATION_DATA_H_
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