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/*
* Copyright (C) 2017 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_TRACED_PROBES_FTRACE_FORMAT_PARSER_FORMAT_PARSER_H_
#define SRC_TRACED_PROBES_FTRACE_FORMAT_PARSER_FORMAT_PARSER_H_
#include <stdint.h>
#include <string>
#include <iosfwd>
#include <iostream>
#include <string>
#include <tuple>
#include <vector>
namespace perfetto {
struct FtraceEvent {
struct Field {
std::string type_and_name;
uint16_t offset;
uint16_t size;
bool is_signed;
bool operator==(const Field& other) const {
return std::tie(type_and_name, offset, size, is_signed) ==
std::tie(other.type_and_name, other.offset, other.size,
other.is_signed);
}
};
// When making changes / additions to these structs, remember that
// proto_translation_table.cc has some fallback code for 'page_header' and
// the 'print' event that fill this struct.
std::string name;
uint32_t id;
std::vector<Field> common_fields;
std::vector<Field> fields;
};
std::string GetNameFromTypeAndName(const std::string& type_and_name);
// Allow gtest to pretty print FtraceEvent::Field.
::std::ostream& operator<<(::std::ostream& os, const FtraceEvent::Field&);
void PrintTo(const FtraceEvent::Field& args, ::std::ostream* os);
// Parses only the body (i.e. contents of format) of an ftrace event format
// file, e.g.
//
// field:unsigned short common_type; offset:0; size:2; signed:0;
// field:unsigned char common_flags; offset:2; size:1; signed:0;
// field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
// field:int common_pid; offset:4; size:4; signed:1;
//
// field:dev_t dev; offset:8; size:4; signed:0;
// field:ino_t ino; offset:12; size:4; signed:0;
// field:ino_t dir; offset:16; size:4; signed:0;
// field:__u16 mode; offset:20; size:2; signed:0;
bool ParseFtraceEventBody(std::string input,
std::vector<FtraceEvent::Field>* common_fields,
std::vector<FtraceEvent::Field>* fields,
bool disable_logging_for_testing = false);
// Parses ftrace event format file. This includes the headers specifying
// name and ID of the event, e.g.
//
// name: ext4_allocate_inode
// ID: 309
// format:
// field:unsigned short common_type; offset:0; size:2; signed:0;
// field:unsigned char common_flags; offset:2; size:1; signed:0;
// field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
// field:int common_pid; offset:4; size:4; signed:1;
//
// field:dev_t dev; offset:8; size:4; signed:0;
// field:ino_t ino; offset:12; size:4; signed:0;
// field:ino_t dir; offset:16; size:4; signed:0;
// field:__u16 mode; offset:20; size:2; signed:0;
bool ParseFtraceEvent(std::string input, FtraceEvent* output = nullptr);
} // namespace perfetto
#endif // SRC_TRACED_PROBES_FTRACE_FORMAT_PARSER_FORMAT_PARSER_H_
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