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