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/*
* Copyright (C) 2022 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.
*/
#pragma once
#include <stdio.h>
#include <memory>
#include <string>
#include <android-base/logging.h>
#include "environment.h"
namespace simpleperf {
class TempSymFile {
public:
static std::unique_ptr<TempSymFile> Create(std::string&& path, bool remove_in_destructor) {
FILE* fp = fopen(path.data(), "web");
if (fp == nullptr) {
PLOG(ERROR) << "failed to create " << path;
return nullptr;
}
if (remove_in_destructor) {
ScopedTempFiles::RegisterTempFile(path);
}
std::unique_ptr<TempSymFile> symfile(new TempSymFile(std::move(path), fp));
if (!symfile->WriteHeader()) {
return nullptr;
}
return symfile;
}
bool WriteEntry(const char* data, size_t size) {
if (fwrite(data, size, 1, fp_.get()) != 1) {
PLOG(ERROR) << "failed to write to " << path_;
return false;
}
file_offset_ += size;
need_flush_ = true;
return true;
}
bool Flush() {
if (need_flush_) {
if (fflush(fp_.get()) != 0) {
PLOG(ERROR) << "failed to flush " << path_;
return false;
}
need_flush_ = false;
}
return true;
}
const std::string& GetPath() const { return path_; }
uint64_t GetOffset() const { return file_offset_; }
private:
TempSymFile(std::string&& path, FILE* fp) : path_(std::move(path)), fp_(fp, fclose) {}
bool WriteHeader() {
char magic[8] = "JIT_SYM";
static_assert(sizeof(magic) == 8);
if (fwrite(magic, sizeof(magic), 1, fp_.get()) != 1) {
PLOG(ERROR) << "failed to write to " << path_;
return false;
}
file_offset_ = sizeof(magic);
return true;
}
const std::string path_;
std::unique_ptr<FILE, decltype(&fclose)> fp_;
uint64_t file_offset_ = 0;
bool need_flush_ = false;
};
} // namespace simpleperf
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