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/*
* Copyright (C) 2015 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_UTILS_H_
#define SIMPLE_PERF_UTILS_H_
#include <stddef.h>
#include <stdio.h>
#include <time.h>
#include <fstream>
#include <functional>
#include <optional>
#include <set>
#include <string>
#include <vector>
#include <android-base/logging.h>
#include <android-base/macros.h>
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
#include <ziparchive/zip_archive.h>
namespace simpleperf {
static inline uint64_t AlignDown(uint64_t value, uint64_t alignment) {
return value & ~(alignment - 1);
}
static inline uint64_t Align(uint64_t value, uint64_t alignment) {
return AlignDown(value + alignment - 1, alignment);
}
#ifdef _WIN32
#define CLOSE_ON_EXEC_MODE ""
#define OS_PATH_SEPARATOR '\\'
#else
#define CLOSE_ON_EXEC_MODE "e"
#define OS_PATH_SEPARATOR '/'
#endif
// OneTimeAllocator is used to allocate memory many times and free only once at the end.
// It reduces the cost to free each allocated memory.
class OneTimeFreeAllocator {
public:
explicit OneTimeFreeAllocator(size_t unit_size = 8192u)
: unit_size_(unit_size), cur_(nullptr), end_(nullptr) {}
~OneTimeFreeAllocator() { Clear(); }
void Clear();
const char* AllocateString(std::string_view s);
private:
const size_t unit_size_;
std::vector<char*> v_;
char* cur_;
char* end_;
};
class LineReader {
public:
explicit LineReader(std::string_view file_path) : ifs_(file_path) {}
// Return true if open file successfully.
bool Ok() const { return ifs_.good(); }
// If available, return next line content with new line, otherwise return nullptr.
std::string* ReadLine() { return (std::getline(ifs_, buf_)) ? &buf_ : nullptr; }
private:
std::ifstream ifs_;
std::string buf_;
};
class FileHelper {
public:
static android::base::unique_fd OpenReadOnly(const std::string& filename);
static android::base::unique_fd OpenWriteOnly(const std::string& filename);
};
class ArchiveHelper {
public:
static std::unique_ptr<ArchiveHelper> CreateInstance(const std::string& filename);
~ArchiveHelper();
// Iterate each entry in the zip file. Break the iteration when callback returns false.
bool IterateEntries(const std::function<bool(ZipEntry&, const std::string&)>& callback);
bool FindEntry(const std::string& name, ZipEntry* entry);
bool GetEntryData(ZipEntry& entry, std::vector<uint8_t>* data);
int GetFd();
private:
ArchiveHelper(ZipArchiveHandle handle, const std::string& filename)
: handle_(handle), filename_(filename) {}
ZipArchiveHandle handle_;
std::string filename_;
DISALLOW_COPY_AND_ASSIGN(ArchiveHelper);
};
template <class T>
void MoveFromBinaryFormat(T& data, const char*& p) {
static_assert(std::is_standard_layout<T>::value, "not standard layout");
memcpy(&data, p, sizeof(T));
p += sizeof(T);
}
template <class T>
void MoveFromBinaryFormat(T& data, char*& p) {
static_assert(std::is_standard_layout<T>::value, "not standard layout");
memcpy(&data, p, sizeof(T));
p += sizeof(T);
}
template <class T>
void MoveFromBinaryFormat(T* data_p, size_t n, const char*& p) {
static_assert(std::is_standard_layout<T>::value, "not standard layout");
size_t size = n * sizeof(T);
memcpy(data_p, p, size);
p += size;
}
template <class T>
void MoveToBinaryFormat(const T& data, char*& p) {
static_assert(std::is_standard_layout<T>::value, "not standard layout");
memcpy(p, &data, sizeof(T));
p += sizeof(T);
}
template <class T>
void MoveToBinaryFormat(const T* data_p, size_t n, char*& p) {
static_assert(std::is_standard_layout<T>::value, "not standard layout");
size_t size = n * sizeof(T);
memcpy(p, data_p, size);
p += size;
}
void PrintIndented(size_t indent, const char* fmt, ...);
void FprintIndented(FILE* fp, size_t indent, const char* fmt, ...);
bool IsPowerOfTwo(uint64_t value);
std::vector<std::string> GetEntriesInDir(const std::string& dirpath);
std::vector<std::string> GetSubDirs(const std::string& dirpath);
bool IsDir(const std::string& dirpath);
bool IsRegularFile(const std::string& filename);
uint64_t GetFileSize(const std::string& filename);
bool MkdirWithParents(const std::string& path);
bool XzDecompress(const std::string& compressed_data, std::string* decompressed_data);
bool GetLogSeverity(const std::string& name, android::base::LogSeverity* severity);
std::string GetLogSeverityName();
bool IsRoot();
size_t GetPageSize();
uint64_t ConvertBytesToValue(const char* bytes, uint32_t size);
timeval SecondToTimeval(double time_in_sec);
std::string GetSimpleperfVersion();
std::optional<std::set<int>> GetCpusFromString(const std::string& s);
std::optional<std::set<pid_t>> GetTidsFromString(const std::string& s, bool check_if_exists);
template <typename T>
std::optional<std::set<T>> ParseUintVector(const std::string& s) {
std::set<T> result;
T value;
for (const auto& p : android::base::Split(s, ",")) {
if (!android::base::ParseUint(p.c_str(), &value, std::numeric_limits<T>::max())) {
LOG(ERROR) << "Invalid Uint '" << p << "' in " << s;
return std::nullopt;
}
result.insert(value);
}
return result;
}
// from boost::hash_combine
template <typename T>
static inline void HashCombine(size_t& seed, const T& val) {
seed ^= std::hash<T>()(val) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
}
size_t SafeStrlen(const char* s, const char* end);
} // namespace simpleperf
#endif // SIMPLE_PERF_UTILS_H_
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