jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <Kernel/PerformanceEventBuffer.h>
8#include <Kernel/Process.h>
9
10namespace Kernel {
11
12ErrorOr<FlatPtr> Process::sys$perf_event(int type, FlatPtr arg1, FlatPtr arg2)
13{
14 VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
15 auto* events_buffer = current_perf_events_buffer();
16 if (!events_buffer)
17 return 0;
18 TRY(events_buffer->append(type, arg1, arg2, {}));
19 return 0;
20}
21
22ErrorOr<FlatPtr> Process::sys$perf_register_string(Userspace<char const*> user_string, size_t user_string_length)
23{
24 VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
25 auto* events_buffer = current_perf_events_buffer();
26 if (!events_buffer)
27 return 0;
28
29 auto string = TRY(try_copy_kstring_from_user(user_string, user_string_length));
30 return events_buffer->register_string(move(string));
31}
32
33}