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/*
* Copyright (C) 2024 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SRC_TRACE_REDACTION_REDACT_PROCESS_EVENTS_H_
#define SRC_TRACE_REDACTION_REDACT_PROCESS_EVENTS_H_
#include <memory>
#include "protos/perfetto/trace/ftrace/ftrace_event_bundle.pbzero.h"
#include "src/trace_redaction/redact_sched_events.h"
#include "src/trace_redaction/trace_redaction_framework.h"
namespace perfetto::trace_redaction {
// Goes through a trace packet and filters:
//
// - task_rename
// - task_newtask
// - sched_process_free
// - print
//
// Goes through a trace packet and modifies pid and comm:
//
// - task_newtask
// - sched_process_free
// - task_rename
//
// 'print' does not support modification.
//
// These operations are separate from the scheduling events in an effort to make
// the code easier to understand, however they use the same filter and modifier
// types and should have the same values when used together.
class RedactProcessEvents : public TransformPrimitive {
public:
base::Status Transform(const Context& context,
std::string* packet) const override;
template <class Modifier>
void emplace_modifier() {
modifier_ = std::make_unique<Modifier>();
}
template <class Filter>
void emplace_filter() {
filter_ = std::make_unique<Filter>();
}
private:
base::Status OnFtraceEvents(const Context& context,
protozero::ConstBytes bytes,
protos::pbzero::FtraceEventBundle* message) const;
base::Status OnFtraceEvent(const Context& context,
int32_t cpu,
protozero::ConstBytes bytes,
std::string* shared_comm,
protos::pbzero::FtraceEvent* message) const;
base::Status OnProcessFree(const Context& context,
uint64_t ts,
int32_t cpu,
protozero::ConstBytes bytes,
std::string* shared_comm,
protos::pbzero::FtraceEvent* parent_message) const;
base::Status OnNewTask(const Context& context,
uint64_t ts,
int32_t cpu,
protozero::ConstBytes bytes,
std::string* shared_comm,
protos::pbzero::FtraceEvent* parent_message) const;
base::Status OnProcessRename(
const Context& context,
uint64_t ts,
int32_t cpu,
protozero::ConstBytes bytes,
std::string* shared_comm,
protos::pbzero::FtraceEvent* parent_message) const;
// Unlike the other On* functions, this one required the event's byte buffer
// because it needs the pid from it.
base::Status OnPrint(const Context& context,
uint64_t ts,
protozero::ConstBytes event_bytes,
protos::pbzero::FtraceEvent* parent_message) const;
std::unique_ptr<SchedEventModifier> modifier_;
std::unique_ptr<SchedEventFilter> filter_;
};
} // namespace perfetto::trace_redaction
#endif // SRC_TRACE_REDACTION_REDACT_PROCESS_EVENTS_H_