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 /* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
  43 #define _DEFAULT_SOURCE 1
  44 #define HAS_BOOL
  45
  46 #include <unistd.h>
  47 #include <stdio.h>
  48 #include <sys/stat.h>
  49 #include <sys/statfs.h>
  50 #include <fcntl.h>
  51 #include <stdbool.h>
  52 #include <stddef.h>
  53 #include <stdlib.h>
  54 #include <stdarg.h>
  55 #include <string.h>
  56 #include <errno.h>
  57 #include <limits.h>
  58 #include <sys/param.h>
  59 #include <sys/types.h>
  60 #include <dirent.h>
  61 #include <sys/time.h>
  62 #include <time.h>
  63 #include <signal.h>
  64 #include <fnmatch.h>
  65 #include <assert.h>
  66 #include <regex.h>
  67 #include <utime.h>
  68 #include <sys/wait.h>
  69 #include <poll.h>
  70 #include <sys/socket.h>
  71 #include <sys/ioctl.h>
  72 #include <inttypes.h>
  73 #include <linux/kernel.h>
  74 #include <linux/magic.h>
  75 #include <linux/types.h>
  76 #include <sys/ttydefaults.h>
  77 #include <api/fs/debugfs.h>
  78 #include <api/fs/tracefs.h>
  79 #include <termios.h>
  80 #include <linux/bitops.h>
  81 #include <termios.h>
  82
  83 extern const char *graph_line;
  84 extern const char *graph_dotted_line;
  85 extern char buildid_dir[];
  86 extern char tracing_path[];
  87 extern char tracing_events_path[];
  88 extern void perf_debugfs_set_path(const char *mountpoint);
  89 const char *perf_debugfs_mount(const char *mountpoint);
  90 char *get_tracing_file(const char *name);
  91 void put_tracing_file(char *file);
  92
  93 /* On most systems <limits.h> would have given us this, but
  94  * not on some systems (e.g. GNU/Hurd).
  95  */
  96 #ifndef PATH_MAX
  97 #define PATH_MAX 4096
  98 #endif
  99
 100 #ifndef PRIuMAX
 101 #define PRIuMAX "llu"
 102 #endif
 103
 104 #ifndef PRIu32
 105 #define PRIu32 "u"
 106 #endif
 107
 108 #ifndef PRIx32
 109 #define PRIx32 "x"
 110 #endif
 111
 112 #ifndef PATH_SEP
 113 #define PATH_SEP ':'
 114 #endif
 115
 116 #ifndef STRIP_EXTENSION
 117 #define STRIP_EXTENSION ""
 118 #endif
 119
 120 #ifndef has_dos_drive_prefix
 121 #define has_dos_drive_prefix(path) 0
 122 #endif
 123
 124 #ifndef is_dir_sep
 125 #define is_dir_sep(c) ((c) == '/')
 126 #endif
 127
 128 #ifdef __GNUC__
 129 #define NORETURN __attribute__((__noreturn__))
 130 #else
 131 #define NORETURN
 132 #ifndef __attribute__
 133 #define __attribute__(x)
 134 #endif
 135 #endif
 136
 137 #define PERF_GTK_DSO  "libperf-gtk.so"
 138
 139 /* General helper functions */
 140 extern void usage(const char *err) NORETURN;
 141 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
 142 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 143 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 144
 145 #include "../../../include/linux/stringify.h"
 146
 147 #define DIE_IF(cnd)     \
 148         do { if (cnd)   \
 149                 die(" at (" __FILE__ ":" __stringify(__LINE__) "): "    \
 150                     __stringify(cnd) "\n");                             \
 151         } while (0)
 152
 153
 154 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
 155
 156 extern int prefixcmp(const char *str, const char *prefix);
 157 extern void set_buildid_dir(const char *dir);
 158
 159 static inline const char *skip_prefix(const char *str, const char *prefix)
 160 {
 161         size_t len = strlen(prefix);
 162         return strncmp(str, prefix, len) ? NULL : str + len;
 163 }
 164
 165 #ifdef __GLIBC_PREREQ
 166 #if __GLIBC_PREREQ(2, 1)
 167 #define HAVE_STRCHRNUL
 168 #endif
 169 #endif
 170
 171 #ifndef HAVE_STRCHRNUL
 172 #define strchrnul gitstrchrnul
 173 static inline char *gitstrchrnul(const char *s, int c)
 174 {
 175         while (*s && *s != c)
 176                 s++;
 177         return (char *)s;
 178 }
 179 #endif
 180
 181 /*
 182  * Wrappers:
 183  */
 184 extern char *xstrdup(const char *str);
 185 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
 186
 187
 188 static inline void *zalloc(size_t size)
 189 {
 190         return calloc(1, size);
 191 }
 192
 193 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
 194
 195 static inline int has_extension(const char *filename, const char *ext)
 196 {
 197         size_t len = strlen(filename);
 198         size_t extlen = strlen(ext);
 199
 200         return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 201 }
 202
 203 /* Sane ctype - no locale, and works with signed chars */
 204 #undef isascii
 205 #undef isspace
 206 #undef isdigit
 207 #undef isxdigit
 208 #undef isalpha
 209 #undef isprint
 210 #undef isalnum
 211 #undef islower
 212 #undef isupper
 213 #undef tolower
 214 #undef toupper
 215
 216 #ifndef NSEC_PER_MSEC
 217 #define NSEC_PER_MSEC   1000000L
 218 #endif
 219
 220 int parse_nsec_time(const char *str, u64 *ptime);
 221
 222 extern unsigned char sane_ctype[256];
 223 #define GIT_SPACE               0x01
 224 #define GIT_DIGIT               0x02
 225 #define GIT_ALPHA               0x04
 226 #define GIT_GLOB_SPECIAL        0x08
 227 #define GIT_REGEX_SPECIAL       0x10
 228 #define GIT_PRINT_EXTRA         0x20
 229 #define GIT_PRINT               0x3E
 230 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 231 #define isascii(x) (((x) & ~0x7f) == 0)
 232 #define isspace(x) sane_istest(x,GIT_SPACE)
 233 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 234 #define isxdigit(x)     \
 235         (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
 236 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 237 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 238 #define isprint(x) sane_istest(x,GIT_PRINT)
 239 #define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20))
 240 #define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20))
 241 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 242 #define toupper(x) sane_case((unsigned char)(x), 0)
 243
 244 static inline int sane_case(int x, int high)
 245 {
 246         if (sane_istest(x, GIT_ALPHA))
 247                 x = (x & ~0x20) | high;
 248         return x;
 249 }
 250
 251 int mkdir_p(char *path, mode_t mode);
 252 int rm_rf(char *path);
 253 int copyfile(const char *from, const char *to);
 254 int copyfile_mode(const char *from, const char *to, mode_t mode);
 255 int copyfile_offset(int fromfd, loff_t from_ofs, int tofd, loff_t to_ofs, u64 size);
 256
 257 s64 perf_atoll(const char *str);
 258 char **argv_split(const char *str, int *argcp);
 259 void argv_free(char **argv);
 260 bool strglobmatch(const char *str, const char *pat);
 261 bool strlazymatch(const char *str, const char *pat);
 262 static inline bool strisglob(const char *str)
 263 {
 264         return strpbrk(str, "*?[") != NULL;
 265 }
 266 int strtailcmp(const char *s1, const char *s2);
 267 char *strxfrchar(char *s, char from, char to);
 268 unsigned long convert_unit(unsigned long value, char *unit);
 269 ssize_t readn(int fd, void *buf, size_t n);
 270 ssize_t writen(int fd, void *buf, size_t n);
 271
 272 struct perf_event_attr;
 273
 274 void event_attr_init(struct perf_event_attr *attr);
 275
 276 #define _STR(x) #x
 277 #define STR(x) _STR(x)
 278
 279 size_t hex_width(u64 v);
 280 int hex2u64(const char *ptr, u64 *val);
 281
 282 char *ltrim(char *s);
 283 char *rtrim(char *s);
 284
 285 void dump_stack(void);
 286 void sighandler_dump_stack(int sig);
 287
 288 extern unsigned int page_size;
 289 extern int cacheline_size;
 290
 291 void get_term_dimensions(struct winsize *ws);
 292 void set_term_quiet_input(struct termios *old);
 293
 294 struct parse_tag {
 295         char tag;
 296         int mult;
 297 };
 298
 299 unsigned long parse_tag_value(const char *str, struct parse_tag *tags);
 300
 301 #define SRCLINE_UNKNOWN  ((char *) "??:0")
 302
 303 static inline int path__join(char *bf, size_t size,
 304                              const char *path1, const char *path2)
 305 {
 306         return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2);
 307 }
 308
 309 static inline int path__join3(char *bf, size_t size,
 310                               const char *path1, const char *path2,
 311                               const char *path3)
 312 {
 313         return scnprintf(bf, size, "%s%s%s%s%s",
 314                          path1, path1[0] ? "/" : "",
 315                          path2, path2[0] ? "/" : "", path3);
 316 }
 317
 318 struct dso;
 319 struct symbol;
 320
 321 extern bool srcline_full_filename;
 322 char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
 323                   bool show_sym);
 324 void free_srcline(char *srcline);
 325
 326 int filename__read_str(const char *filename, char **buf, size_t *sizep);
 327 int perf_event_paranoid(void);
 328
 329 void mem_bswap_64(void *src, int byte_size);
 330 void mem_bswap_32(void *src, int byte_size);
 331
 332 const char *get_filename_for_perf_kvm(void);
 333 bool find_process(const char *name);
 334
 335 #ifdef HAVE_ZLIB_SUPPORT
 336 int gzip_decompress_to_file(const char *input, int output_fd);
 337 #endif
 338
 339 #ifdef HAVE_LZMA_SUPPORT
 340 int lzma_decompress_to_file(const char *input, int output_fd);
 341 #endif
 342
 343 char *asprintf_expr_inout_ints(const char *var, bool in, size_t nints, int *ints);
 344
 345 static inline char *asprintf_expr_in_ints(const char *var, size_t nints, int *ints)
 346 {
 347         return asprintf_expr_inout_ints(var, true, nints, ints);
 348 }
 349
 350 static inline char *asprintf_expr_not_in_ints(const char *var, size_t nints, int *ints)
 351 {
 352         return asprintf_expr_inout_ints(var, false, nints, ints);
 353 }
 354
 355 int get_stack_size(const char *str, unsigned long *_size);
 356
 357 #endif /* GIT_COMPAT_UTIL_H */