tools/perf/util/util.h

   1 #ifndef GIT_COMPAT_UTIL_H
   2 #define GIT_COMPAT_UTIL_H
   3
   4 #ifndef FLEX_ARRAY
   5 /*
   6  * See if our compiler is known to support flexible array members.
   7  */
   8 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
   9 # define FLEX_ARRAY /* empty */
  10 #elif defined(__GNUC__)
  11 # if (__GNUC__ >= 3)
  12 #  define FLEX_ARRAY /* empty */
  13 # else
  14 #  define FLEX_ARRAY 0 /* older GNU extension */
  15 # endif
  16 #endif
  17
  18 /*
  19  * Otherwise, default to safer but a bit wasteful traditional style
  20  */
  21 #ifndef FLEX_ARRAY
  22 # define FLEX_ARRAY 1
  23 #endif
  24 #endif
  25
  26 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
  27
  28 #ifdef __GNUC__
  29 #define TYPEOF(x) (__typeof__(x))
  30 #else
  31 #define TYPEOF(x)
  32 #endif
  33
  34 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
  35 #define HAS_MULTI_BITS(i)  ((i) & ((i) - 1))  /* checks if an integer has more than 1 bit set */
  36
  37 /* Approximation of the length of the decimal representation of this type. */
  38 #define decimal_length(x)       ((int)(sizeof(x) * 2.56 + 0.5) + 1)
  39
  40 #define _ALL_SOURCE 1
  41 #define _BSD_SOURCE 1
  42 #define HAS_BOOL
  43
  44 #include <unistd.h>
  45 #include <stdio.h>
  46 #include <sys/stat.h>
  47 #include <sys/statfs.h>
  48 #include <fcntl.h>
  49 #include <stdbool.h>
  50 #include <stddef.h>
  51 #include <stdlib.h>
  52 #include <stdarg.h>
  53 #include <string.h>
  54 #include <errno.h>
  55 #include <limits.h>
  56 #include <sys/param.h>
  57 #include <sys/types.h>
  58 #include <dirent.h>
  59 #include <sys/time.h>
  60 #include <time.h>
  61 #include <signal.h>
  62 #include <fnmatch.h>
  63 #include <assert.h>
  64 #include <regex.h>
  65 #include <utime.h>
  66 #include <sys/wait.h>
  67 #include <sys/poll.h>
  68 #include <sys/socket.h>
  69 #include <sys/ioctl.h>
  70 #include <inttypes.h>
  71 #include <linux/magic.h>
  72 #include "types.h"
  73 #include <sys/ttydefaults.h>
  74 #include <api/fs/debugfs.h>
  75 #include <termios.h>
  76 #include <linux/bitops.h>
  77
  78 extern const char *graph_line;
  79 extern const char *graph_dotted_line;
  80 extern char buildid_dir[];
  81 extern char tracing_events_path[];
  82 extern void perf_debugfs_set_path(const char *mountpoint);
  83 const char *perf_debugfs_mount(const char *mountpoint);
  84 const char *find_tracing_dir(void);
  85 char *get_tracing_file(const char *name);
  86 void put_tracing_file(char *file);
  87
  88 /* On most systems <limits.h> would have given us this, but
  89  * not on some systems (e.g. GNU/Hurd).
  90  */
  91 #ifndef PATH_MAX
  92 #define PATH_MAX 4096
  93 #endif
  94
  95 #ifndef PRIuMAX
  96 #define PRIuMAX "llu"
  97 #endif
  98
  99 #ifndef PRIu32
 100 #define PRIu32 "u"
 101 #endif
 102
 103 #ifndef PRIx32
 104 #define PRIx32 "x"
 105 #endif
 106
 107 #ifndef PATH_SEP
 108 #define PATH_SEP ':'
 109 #endif
 110
 111 #ifndef STRIP_EXTENSION
 112 #define STRIP_EXTENSION ""
 113 #endif
 114
 115 #ifndef has_dos_drive_prefix
 116 #define has_dos_drive_prefix(path) 0
 117 #endif
 118
 119 #ifndef is_dir_sep
 120 #define is_dir_sep(c) ((c) == '/')
 121 #endif
 122
 123 #ifdef __GNUC__
 124 #define NORETURN __attribute__((__noreturn__))
 125 #else
 126 #define NORETURN
 127 #ifndef __attribute__
 128 #define __attribute__(x)
 129 #endif
 130 #endif
 131
 132 #define PERF_GTK_DSO  "libperf-gtk.so"
 133
 134 /* General helper functions */
 135 extern void usage(const char *err) NORETURN;
 136 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
 137 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 138 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 139
 140 #include "../../../include/linux/stringify.h"
 141
 142 #define DIE_IF(cnd)     \
 143         do { if (cnd)   \
 144                 die(" at (" __FILE__ ":" __stringify(__LINE__) "): "    \
 145                     __stringify(cnd) "\n");                             \
 146         } while (0)
 147
 148
 149 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
 150
 151 extern int prefixcmp(const char *str, const char *prefix);
 152 extern void set_buildid_dir(void);
 153 extern void disable_buildid_cache(void);
 154
 155 static inline const char *skip_prefix(const char *str, const char *prefix)
 156 {
 157         size_t len = strlen(prefix);
 158         return strncmp(str, prefix, len) ? NULL : str + len;
 159 }
 160
 161 #ifdef __GLIBC_PREREQ
 162 #if __GLIBC_PREREQ(2, 1)
 163 #define HAVE_STRCHRNUL
 164 #endif
 165 #endif
 166
 167 #ifndef HAVE_STRCHRNUL
 168 #define strchrnul gitstrchrnul
 169 static inline char *gitstrchrnul(const char *s, int c)
 170 {
 171         while (*s && *s != c)
 172                 s++;
 173         return (char *)s;
 174 }
 175 #endif
 176
 177 /*
 178  * Wrappers:
 179  */
 180 extern char *xstrdup(const char *str);
 181 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
 182
 183
 184 static inline void *zalloc(size_t size)
 185 {
 186         return calloc(1, size);
 187 }
 188
 189 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
 190
 191 static inline int has_extension(const char *filename, const char *ext)
 192 {
 193         size_t len = strlen(filename);
 194         size_t extlen = strlen(ext);
 195
 196         return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 197 }
 198
 199 /* Sane ctype - no locale, and works with signed chars */
 200 #undef isascii
 201 #undef isspace
 202 #undef isdigit
 203 #undef isxdigit
 204 #undef isalpha
 205 #undef isprint
 206 #undef isalnum
 207 #undef islower
 208 #undef isupper
 209 #undef tolower
 210 #undef toupper
 211
 212 #ifndef NSEC_PER_MSEC
 213 #define NSEC_PER_MSEC   1000000L
 214 #endif
 215
 216 int parse_nsec_time(const char *str, u64 *ptime);
 217
 218 extern unsigned char sane_ctype[256];
 219 #define GIT_SPACE               0x01
 220 #define GIT_DIGIT               0x02
 221 #define GIT_ALPHA               0x04
 222 #define GIT_GLOB_SPECIAL        0x08
 223 #define GIT_REGEX_SPECIAL       0x10
 224 #define GIT_PRINT_EXTRA         0x20
 225 #define GIT_PRINT               0x3E
 226 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 227 #define isascii(x) (((x) & ~0x7f) == 0)
 228 #define isspace(x) sane_istest(x,GIT_SPACE)
 229 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 230 #define isxdigit(x)     \
 231         (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
 232 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 233 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 234 #define isprint(x) sane_istest(x,GIT_PRINT)
 235 #define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20))
 236 #define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20))
 237 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 238 #define toupper(x) sane_case((unsigned char)(x), 0)
 239
 240 static inline int sane_case(int x, int high)
 241 {
 242         if (sane_istest(x, GIT_ALPHA))
 243                 x = (x & ~0x20) | high;
 244         return x;
 245 }
 246
 247 int mkdir_p(char *path, mode_t mode);
 248 int copyfile(const char *from, const char *to);
 249 int copyfile_mode(const char *from, const char *to, mode_t mode);
 250
 251 s64 perf_atoll(const char *str);
 252 char **argv_split(const char *str, int *argcp);
 253 void argv_free(char **argv);
 254 bool strglobmatch(const char *str, const char *pat);
 255 bool strlazymatch(const char *str, const char *pat);
 256 int strtailcmp(const char *s1, const char *s2);
 257 char *strxfrchar(char *s, char from, char to);
 258 unsigned long convert_unit(unsigned long value, char *unit);
 259 ssize_t readn(int fd, void *buf, size_t n);
 260 ssize_t writen(int fd, void *buf, size_t n);
 261
 262 struct perf_event_attr;
 263
 264 void event_attr_init(struct perf_event_attr *attr);
 265
 266 #define _STR(x) #x
 267 #define STR(x) _STR(x)
 268
 269 /*
 270  *  Determine whether some value is a power of two, where zero is
 271  * *not* considered a power of two.
 272  */
 273
 274 static inline __attribute__((const))
 275 bool is_power_of_2(unsigned long n)
 276 {
 277         return (n != 0 && ((n & (n - 1)) == 0));
 278 }
 279
 280 static inline unsigned next_pow2(unsigned x)
 281 {
 282         if (!x)
 283                 return 1;
 284         return 1ULL << (32 - __builtin_clz(x - 1));
 285 }
 286
 287 static inline unsigned long next_pow2_l(unsigned long x)
 288 {
 289 #if BITS_PER_LONG == 64
 290         if (x <= (1UL << 31))
 291                 return next_pow2(x);
 292         return (unsigned long)next_pow2(x >> 32) << 32;
 293 #else
 294         return next_pow2(x);
 295 #endif
 296 }
 297
 298 size_t hex_width(u64 v);
 299 int hex2u64(const char *ptr, u64 *val);
 300
 301 char *ltrim(char *s);
 302 char *rtrim(char *s);
 303
 304 void dump_stack(void);
 305
 306 extern unsigned int page_size;
 307
 308 void get_term_dimensions(struct winsize *ws);
 309
 310 struct parse_tag {
 311         char tag;
 312         int mult;
 313 };
 314
 315 unsigned long parse_tag_value(const char *str, struct parse_tag *tags);
 316
 317 #define SRCLINE_UNKNOWN  ((char *) "??:0")
 318
 319 struct dso;
 320
 321 char *get_srcline(struct dso *dso, unsigned long addr);
 322 void free_srcline(char *srcline);
 323
 324 int filename__read_int(const char *filename, int *value);
 325 int filename__read_str(const char *filename, char **buf, size_t *sizep);
 326 int perf_event_paranoid(void);
 327
 328 void mem_bswap_64(void *src, int byte_size);
 329 void mem_bswap_32(void *src, int byte_size);
 330
 331 const char *get_filename_for_perf_kvm(void);
 332 #endif /* GIT_COMPAT_UTIL_H */