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/*
* Copyright (C) 2016 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 SIMPLE_PERF_TRACING_H_
#define SIMPLE_PERF_TRACING_H_
#include <optional>
#include <set>
#include <vector>
#include <android-base/logging.h>
#include "event_type.h"
#include "utils.h"
namespace simpleperf {
struct TracingField {
std::string name;
size_t offset = 0;
size_t elem_size = 0;
size_t elem_count = 1;
bool is_signed = false;
bool is_dynamic = false;
bool operator==(const TracingField& other) const {
return name == other.name && offset == other.offset && elem_size == other.elem_size &&
elem_count == other.elem_count && is_signed == other.is_signed &&
is_dynamic == other.is_dynamic;
}
};
struct TracingFieldPlace {
uint32_t offset;
uint32_t size;
uint64_t ReadFromData(const char* raw_data) {
return ConvertBytesToValue(raw_data + offset, size);
}
};
struct StringTracingFieldPlace {
uint32_t offset;
uint32_t size;
std::string ReadFromData(const char* raw_data) {
char s[size + 1];
s[size] = '\0';
memcpy(s, raw_data + offset, size);
return s;
}
};
struct TracingFormat {
std::string system_name;
std::string name;
uint64_t id = 0;
std::vector<TracingField> fields;
void GetField(const std::string& name, TracingFieldPlace& place) const {
const TracingField& field = GetField(name);
place.offset = field.offset;
place.size = field.elem_size;
}
void GetField(const std::string& name, StringTracingFieldPlace& place) const {
const TracingField& field = GetField(name);
place.offset = field.offset;
place.size = field.elem_count;
}
private:
const TracingField& GetField(const std::string& name) const {
for (const auto& field : fields) {
if (field.name == name) {
return field;
}
}
LOG(FATAL) << "Couldn't find field " << name << "in TracingFormat of " << this->name;
return fields[0];
}
};
class TracingFile;
class Tracing {
public:
static std::unique_ptr<Tracing> Create(const std::vector<char>& data);
~Tracing();
void Dump(size_t indent);
std::optional<TracingFormat> GetTracingFormatHavingId(uint64_t trace_event_id);
std::string GetTracingEventNameHavingId(uint64_t trace_event_id);
const std::string& GetKallsyms() const;
uint32_t GetPageSize() const;
private:
Tracing();
std::unique_ptr<TracingFile> tracing_file_;
std::vector<TracingFormat> tracing_formats_;
};
bool GetTracingData(const std::vector<const EventType*>& event_types, std::vector<char>* data);
// use_quote: whether or not to use quotes in string operands
// used_fields: field names used in the filter
// Return adjusted filter on success, otherwise return std::nullopt.
using FieldNameSet = std::set<std::string>;
std::optional<std::string> AdjustTracepointFilter(const std::string& filter, bool use_quote,
FieldNameSet* used_fields);
std::optional<FieldNameSet> GetFieldNamesForTracepointEvent(const EventType& event);
TracingFormat ParseTracingFormat(const std::string& data);
} // namespace simpleperf
#endif // SIMPLE_PERF_TRACING_H_
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