1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef SIMPLE_PERF_UTILS_H_
18 #define SIMPLE_PERF_UTILS_H_
19
20 #include <stddef.h>
21 #include <time.h>
22
23 #include <string>
24 #include <vector>
25
26 #include <android-base/logging.h>
27 #include <android-base/macros.h>
28 #include <ziparchive/zip_archive.h>
29
Align(uint64_t value,uint64_t alignment)30 static inline uint64_t Align(uint64_t value, uint64_t alignment) {
31 return (value + alignment - 1) & ~(alignment - 1);
32 }
33
34 #ifdef _WIN32
35 #define CLOSE_ON_EXEC_MODE ""
36 #else
37 #define CLOSE_ON_EXEC_MODE "e"
38 #endif
39
40 // OneTimeAllocator is used to allocate memory many times and free only once at the end.
41 // It reduces the cost to free each allocated memory.
42 class OneTimeFreeAllocator {
43 public:
44 explicit OneTimeFreeAllocator(size_t unit_size = 8192u)
unit_size_(unit_size)45 : unit_size_(unit_size), cur_(nullptr), end_(nullptr) {
46 }
47
~OneTimeFreeAllocator()48 ~OneTimeFreeAllocator() {
49 Clear();
50 }
51
52 void Clear();
53 const char* AllocateString(const std::string& s);
54
55 private:
56 const size_t unit_size_;
57 std::vector<char*> v_;
58 char* cur_;
59 char* end_;
60 };
61
62 class FileHelper {
63 public:
64 static FileHelper OpenReadOnly(const std::string& filename);
65 static FileHelper OpenWriteOnly(const std::string& filename);
66
FileHelper(FileHelper && other)67 FileHelper(FileHelper&& other) {
68 fd_ = other.fd_;
69 other.fd_ = -1;
70 }
71
72 ~FileHelper();
73
74 explicit operator bool() const {
75 return fd_ != -1;
76 }
77
fd()78 int fd() const {
79 return fd_;
80 }
81
82 private:
FileHelper(int fd)83 explicit FileHelper(int fd) : fd_(fd) {}
84 int fd_;
85
86 DISALLOW_COPY_AND_ASSIGN(FileHelper);
87 };
88
89 class ArchiveHelper {
90 public:
91 ArchiveHelper(int fd, const std::string& debug_filename);
92 ~ArchiveHelper();
93
94 explicit operator bool() const {
95 return valid_;
96 }
archive_handle()97 ZipArchiveHandle &archive_handle() {
98 return handle_;
99 }
100
101 private:
102 ZipArchiveHandle handle_;
103 bool valid_;
104
105 DISALLOW_COPY_AND_ASSIGN(ArchiveHelper);
106 };
107
108 template <class T>
MoveFromBinaryFormat(T & data,const char * & p)109 void MoveFromBinaryFormat(T& data, const char*& p) {
110 static_assert(std::is_standard_layout<T>::value, "not standard layout");
111 memcpy(&data, p, sizeof(T));
112 p += sizeof(T);
113 }
114
115 template <class T>
MoveFromBinaryFormat(T * data_p,size_t n,const char * & p)116 void MoveFromBinaryFormat(T* data_p, size_t n, const char*& p) {
117 static_assert(std::is_standard_layout<T>::value, "not standard layout");
118 size_t size = n * sizeof(T);
119 memcpy(data_p, p, size);
120 p += size;
121 }
122
123 template <class T>
MoveToBinaryFormat(const T & data,char * & p)124 void MoveToBinaryFormat(const T& data, char*& p) {
125 static_assert(std::is_standard_layout<T>::value, "not standard layout");
126 memcpy(p, &data, sizeof(T));
127 p += sizeof(T);
128 }
129
130 template <class T>
MoveToBinaryFormat(const T * data_p,size_t n,char * & p)131 void MoveToBinaryFormat(const T* data_p, size_t n, char*& p) {
132 static_assert(std::is_standard_layout<T>::value, "not standard layout");
133 size_t size = n * sizeof(T);
134 memcpy(p, data_p, size);
135 p += size;
136 }
137
138 void PrintIndented(size_t indent, const char* fmt, ...);
139 void FprintIndented(FILE* fp, size_t indent, const char* fmt, ...);
140
141 bool IsPowerOfTwo(uint64_t value);
142
143 std::vector<std::string> GetEntriesInDir(const std::string& dirpath);
144 std::vector<std::string> GetSubDirs(const std::string& dirpath);
145 bool IsDir(const std::string& dirpath);
146 bool IsRegularFile(const std::string& filename);
147 uint64_t GetFileSize(const std::string& filename);
148 bool MkdirWithParents(const std::string& path);
149
150 bool XzDecompress(const std::string& compressed_data, std::string* decompressed_data);
151
152 bool GetLogSeverity(const std::string& name, android::base::LogSeverity* severity);
153
154 bool IsRoot();
155
156 struct KernelSymbol {
157 uint64_t addr;
158 char type;
159 const char* name;
160 const char* module; // If nullptr, the symbol is not in a kernel module.
161 };
162
163 bool ProcessKernelSymbols(std::string& symbol_data,
164 const std::function<bool(const KernelSymbol&)>& callback);
165
166 size_t GetPageSize();
167
168 uint64_t ConvertBytesToValue(const char* bytes, uint32_t size);
169
170 timeval SecondToTimeval(double time_in_sec);
171
172 #endif // SIMPLE_PERF_UTILS_H_
173