| // Copyright (c) 2012 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROMIUMOS_WIDE_PROFILING_UTILS_H_ |
| #define CHROMIUMOS_WIDE_PROFILING_UTILS_H_ |
| |
| #include <stdint.h> |
| #include <stdlib.h> // for free() |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/logging.h" |
| |
| #include "chromiumos-wide-profiling/kernel/perf_internals.h" |
| #include "chromiumos-wide-profiling/quipper_string.h" |
| |
| namespace quipper { |
| |
| struct FreeDeleter { |
| inline void operator()(void* pointer) { |
| free(pointer); |
| } |
| }; |
| |
| template <typename T> |
| using malloced_unique_ptr = std::unique_ptr<T, FreeDeleter>; |
| |
| // Given a valid open file handle |fp|, returns the size of the file. |
| int64_t GetFileSizeFromHandle(FILE* fp); |
| |
| event_t* CallocMemoryForEvent(size_t size); |
| event_t* ReallocMemoryForEvent(event_t* event, size_t new_size); |
| |
| build_id_event* CallocMemoryForBuildID(size_t size); |
| |
| bool FileToBuffer(const string& filename, std::vector<char>* contents); |
| |
| template <typename CharContainer> |
| bool BufferToFile(const string& filename, const CharContainer& contents) { |
| FILE* fp = fopen(filename.c_str(), "wb"); |
| if (!fp) |
| return false; |
| // Do not write anything if |contents| contains nothing. fopen will create |
| // an empty file. |
| if (!contents.empty()) { |
| CHECK_EQ(fwrite(contents.data(), |
| sizeof(typename CharContainer::value_type), |
| contents.size(), |
| fp), |
| contents.size()); |
| } |
| fclose(fp); |
| return true; |
| } |
| |
| uint64_t Md5Prefix(const string& input); |
| uint64_t Md5Prefix(const std::vector<char>& input); |
| |
| // Returns a string that represents |array| in hexadecimal. |
| string HexToString(const u8* array, size_t length); |
| |
| // Converts |str| to a hexadecimal number, stored in |array|. Returns true on |
| // success. Only stores up to |length| bytes - if there are more characters in |
| // the string, they are ignored (but the function may still return true). |
| bool StringToHex(const string& str, u8* array, size_t length); |
| |
| // Adjust |size| to blocks of |align_size|. i.e. returns the smallest multiple |
| // of |align_size| that can fit |size|. |
| uint64_t AlignSize(uint64_t size, uint32_t align_size); |
| |
| // Given a general perf sample format |sample_type|, return the fields of that |
| // format that are present in a sample for an event of type |event_type|. |
| // |
| // e.g. FORK and EXIT events have the fields {time, pid/tid, cpu, id}. |
| // Given a sample type with fields {ip, time, pid/tid, and period}, return |
| // the intersection of these two field sets: {time, pid/tid}. |
| // |
| // All field formats are bitfields, as defined by enum perf_event_sample_format |
| // in kernel/perf_event.h. |
| uint64_t GetSampleFieldsForEventType(uint32_t event_type, uint64_t sample_type); |
| |
| // Returns the offset in bytes within a perf event structure at which the raw |
| // perf sample data is located. |
| uint64_t GetPerfSampleDataOffset(const event_t& event); |
| |
| // Returns the size of the 8-byte-aligned memory for storing |string|. |
| size_t GetUint64AlignedStringLength(const string& str); |
| |
| // Returns true iff the file exists. |
| bool FileExists(const string& filename); |
| |
| // Reads the contents of a file into |data|. Returns true on success, false if |
| // it fails. |
| bool ReadFileToData(const string& filename, std::vector<char>* data); |
| |
| // Writes contents of |data| to a file with name |filename|, overwriting any |
| // existing file. Returns true on success, false if it fails. |
| bool WriteDataToFile(const std::vector<char>& data, const string& filename); |
| |
| // Trim leading and trailing whitespace from |str|. |
| void TrimWhitespace(string* str); |
| |
| } // namespace quipper |
| |
| #endif // CHROMIUMOS_WIDE_PROFILING_UTILS_H_ |