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55 lines
1.6 KiB
55 lines
1.6 KiB
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <optional>
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#include <string>
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#include <vector>
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namespace simpleperf {
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struct ProbeEvent {
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std::string group_name;
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std::string event_name;
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};
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// Add kprobe events in /sys/kernel/debug/tracing/kprobe_events, and
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// delete them in ProbeEvents::clear().
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class ProbeEvents {
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public:
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~ProbeEvents() { Clear(); }
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static bool ParseKprobeEventName(const std::string& kprobe_cmd, ProbeEvent* event);
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bool IsKprobeSupported();
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// Accept kprobe cmd as in <linux_kernel>/Documentation/trace/kprobetrace.rst.
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bool AddKprobe(const std::string& kprobe_cmd);
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bool IsProbeEvent(const std::string& event_name);
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// If not exist, add a kprobe tracepoint at the function entry.
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bool CreateProbeEventIfNotExist(const std::string& event_name);
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bool IsEmpty() const { return kprobe_events_.empty(); }
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void Clear();
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private:
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bool WriteKprobeCmd(const std::string& kprobe_cmd);
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std::vector<ProbeEvent> kprobe_events_;
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std::optional<std::string> kprobe_control_path_;
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};
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} // namespace simpleperf
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