/*
 * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <Kernel/PerformanceEventBuffer.h>
#include <Kernel/Process.h>

namespace Kernel {

KResultOr<FlatPtr> Process::sys$perf_event(int type, FlatPtr arg1, FlatPtr arg2)
{
    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
    auto* events_buffer = current_perf_events_buffer();
    if (!events_buffer)
        return KSuccess;
    return events_buffer->append(type, arg1, arg2, nullptr);
}

KResultOr<FlatPtr> Process::sys$perf_register_string(Userspace<char const*> user_string, size_t user_string_length)
{
    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
    auto* events_buffer = current_perf_events_buffer();
    if (!events_buffer)
        return KSuccess;

    auto string = TRY(try_copy_kstring_from_user(user_string, user_string_length));
    return events_buffer->register_string(move(string));
}

}