/*
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* Copyright (C) 2018 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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#ifndef SRC_TRACE_PROCESSOR_FTRACE_DESCRIPTORS_H_
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#define SRC_TRACE_PROCESSOR_FTRACE_DESCRIPTORS_H_
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#include <array>
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#include "perfetto/protozero/proto_utils.h"
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namespace perfetto {
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namespace trace_processor {
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using protozero::proto_utils::ProtoSchemaType;
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// We assume that no ftrace event (e.g. SchedSwitchFtraceEvent) has a proto
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// field which id is >= this.
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static constexpr size_t kMaxFtraceEventFields = 32;
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// This file is the header for the generated descriptors for all ftrace event
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// protos. These descriptors can be used to parse ftrace event protos without
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// needing individual parsing logic for every event. (In proto_trace_parser.cc)
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// By generating these descriptors we avoid having to build the full proto
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// library. These structs deliberately don't have a ctor (nor are initialized)
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// because they are used to define linker-initialized dicts in the .cc file.
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struct FieldDescriptor {
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const char* name;
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ProtoSchemaType type;
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};
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struct MessageDescriptor {
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const char* name;
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size_t max_field_id;
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FieldDescriptor fields[kMaxFtraceEventFields];
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};
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MessageDescriptor* GetMessageDescriptorForId(size_t id);
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size_t GetDescriptorsSize();
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} // namespace trace_processor
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} // namespace perfetto
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#endif // SRC_TRACE_PROCESSOR_FTRACE_DESCRIPTORS_H_
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