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https://github.com/RGBCube/serenity
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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
33 lines
911 B
C++
33 lines
911 B
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/PerformanceEventBuffer.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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ErrorOr<FlatPtr> Process::sys$perf_event(int type, FlatPtr arg1, FlatPtr arg2)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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auto* events_buffer = current_perf_events_buffer();
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if (!events_buffer)
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return 0;
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TRY(events_buffer->append(type, arg1, arg2, nullptr));
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return 0;
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}
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ErrorOr<FlatPtr> Process::sys$perf_register_string(Userspace<char const*> user_string, size_t user_string_length)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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auto* events_buffer = current_perf_events_buffer();
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if (!events_buffer)
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return 0;
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auto string = TRY(try_copy_kstring_from_user(user_string, user_string_length));
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return events_buffer->register_string(move(string));
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}
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}
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