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fbc771efe9
While null StringViews are just as bad, these prevent the removal of StringView(char const*) as that constructor accepts a nullptr. No functional changes.
33 lines
906 B
C++
33 lines
906 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$perf_event(int type, FlatPtr arg1, FlatPtr arg2)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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auto* events_buffer = current_perf_events_buffer();
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if (!events_buffer)
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return 0;
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TRY(events_buffer->append(type, arg1, arg2, {}));
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return 0;
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}
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ErrorOr<FlatPtr> Process::sys$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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