src/trace_redaction/modify.cc

/*
 * 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.
 */

#include "src/trace_redaction/modify.h"
#include "src/trace_redaction/proto_util.h"

namespace perfetto::trace_redaction {

PidCommModifier::~PidCommModifier() = default;

FtraceEventModifier::~FtraceEventModifier() = default;

void ClearComms::Modify(const Context& context,
                        uint64_t ts,
                        int32_t,
                        int32_t* pid,
                        std::string* comm) const {
  PERFETTO_DCHECK(context.timeline);
  PERFETTO_DCHECK(context.package_uid.has_value());
  PERFETTO_DCHECK(pid);
  PERFETTO_DCHECK(comm);

  if (!context.timeline->PidConnectsToUid(ts, *pid, *context.package_uid)) {
    comm->clear();
  }
}

void DoNothing::Modify(const Context&,
                       uint64_t,
                       int32_t,
                       int32_t*,
                       std::string*) const {}

// Because FtraceEventModifier is responsible for modifying and writing
// (compared to PidCommModifier), it needs to pass the value through to the
// message.
void DoNothing::Modify(
    const Context&,
    const protos::pbzero::FtraceEventBundle::Decoder&,
    protozero::Field event,
    protos::pbzero::FtraceEventBundle* parent_message) const {
  proto_util::AppendField(event, parent_message);
}

}  // namespace perfetto::trace_redaction