ladybird/Kernel/Syscalls/perf_event.cpp

34 lines
920 B
C++

/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Tasks/PerformanceEventBuffer.h>
#include <Kernel/Tasks/Process.h>
namespace Kernel {
ErrorOr<FlatPtr> Process::sys$perf_event(int type, FlatPtr arg1, FlatPtr arg2)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
auto* events_buffer = current_perf_events_buffer();
if (!events_buffer)
return 0;
TRY(events_buffer->append(type, arg1, arg2, {}));
return 0;
}
ErrorOr<FlatPtr> Process::sys$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 0;
auto string = TRY(try_copy_kstring_from_user(user_string, user_string_length));
return events_buffer->register_string(move(string));
}
}