tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/tracing_path.h>
78#include <termios.h>
79#include <linux/bitops.h>
80#include <termios.h>
81
82extern const char *graph_line;
83extern const char *graph_dotted_line;
84extern char buildid_dir[];
85
86/* On most systems <limits.h> would have given us this, but
87 * not on some systems (e.g. GNU/Hurd).
88 */
89#ifndef PATH_MAX
90#define PATH_MAX 4096
91#endif
92
93#ifndef PRIuMAX
94#define PRIuMAX "llu"
95#endif
96
97#ifndef PRIu32
98#define PRIu32 "u"
99#endif
100
101#ifndef PRIx32
102#define PRIx32 "x"
103#endif
104
105#ifndef PATH_SEP
106#define PATH_SEP ':'
107#endif
108
109#ifndef STRIP_EXTENSION
110#define STRIP_EXTENSION ""
111#endif
112
113#ifndef has_dos_drive_prefix
114#define has_dos_drive_prefix(path) 0
115#endif
116
117#ifndef is_dir_sep
118#define is_dir_sep(c) ((c) == '/')
119#endif
120
121#ifdef __GNUC__
122#define NORETURN __attribute__((__noreturn__))
123#else
124#define NORETURN
125#ifndef __attribute__
126#define __attribute__(x)
127#endif
128#endif
129
130#define PERF_GTK_DSO "libperf-gtk.so"
131
132/* General helper functions */
133extern void usage(const char *err) NORETURN;
134extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
135extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
136extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
137
138#include "../../../include/linux/stringify.h"
139
140#define DIE_IF(cnd) \
141 do { if (cnd) \
142 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \
143 __stringify(cnd) "\n"); \
144 } while (0)
145
146
147extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
148extern void set_warning_routine(void (*routine)(const char *err, va_list params));
149
150extern int prefixcmp(const char *str, const char *prefix);
151extern void set_buildid_dir(const char *dir);
152
153static inline const char *skip_prefix(const char *str, const char *prefix)
154{
155 size_t len = strlen(prefix);
156 return strncmp(str, prefix, len) ? NULL : str + len;
157}
158
159#ifdef __GLIBC_PREREQ
160#if __GLIBC_PREREQ(2, 1)
161#define HAVE_STRCHRNUL
162#endif
163#endif
164
165#ifndef HAVE_STRCHRNUL
166#define strchrnul gitstrchrnul
167static inline char *gitstrchrnul(const char *s, int c)
168{
169 while (*s && *s != c)
170 s++;
171 return (char *)s;
172}
173#endif
174
175/*
176 * Wrappers:
177 */
178extern char *xstrdup(const char *str);
179extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
180
181
182static inline void *zalloc(size_t size)
183{
184 return calloc(1, size);
185}
186
187#define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
188
189static inline int has_extension(const char *filename, const char *ext)
190{
191 size_t len = strlen(filename);
192 size_t extlen = strlen(ext);
193
194 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
195}
196
197/* Sane ctype - no locale, and works with signed chars */
198#undef isascii
199#undef isspace
200#undef isdigit
201#undef isxdigit
202#undef isalpha
203#undef isprint
204#undef isalnum
205#undef islower
206#undef isupper
207#undef tolower
208#undef toupper
209
210#ifndef NSEC_PER_MSEC
211#define NSEC_PER_MSEC 1000000L
212#endif
213
214int parse_nsec_time(const char *str, u64 *ptime);
215
216extern unsigned char sane_ctype[256];
217#define GIT_SPACE 0x01
218#define GIT_DIGIT 0x02
219#define GIT_ALPHA 0x04
220#define GIT_GLOB_SPECIAL 0x08
221#define GIT_REGEX_SPECIAL 0x10
222#define GIT_PRINT_EXTRA 0x20
223#define GIT_PRINT 0x3E
224#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
225#define isascii(x) (((x) & ~0x7f) == 0)
226#define isspace(x) sane_istest(x,GIT_SPACE)
227#define isdigit(x) sane_istest(x,GIT_DIGIT)
228#define isxdigit(x) \
229 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
230#define isalpha(x) sane_istest(x,GIT_ALPHA)
231#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
232#define isprint(x) sane_istest(x,GIT_PRINT)
233#define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20))
234#define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20))
235#define tolower(x) sane_case((unsigned char)(x), 0x20)
236#define toupper(x) sane_case((unsigned char)(x), 0)
237
238static inline int sane_case(int x, int high)
239{
240 if (sane_istest(x, GIT_ALPHA))
241 x = (x & ~0x20) | high;
242 return x;
243}
244
245int mkdir_p(char *path, mode_t mode);
246int rm_rf(char *path);
247int copyfile(const char *from, const char *to);
248int copyfile_mode(const char *from, const char *to, mode_t mode);
249int copyfile_offset(int fromfd, loff_t from_ofs, int tofd, loff_t to_ofs, u64 size);
250
251s64 perf_atoll(const char *str);
252char **argv_split(const char *str, int *argcp);
253void argv_free(char **argv);
254bool strglobmatch(const char *str, const char *pat);
255bool strlazymatch(const char *str, const char *pat);
256static inline bool strisglob(const char *str)
257{
258 return strpbrk(str, "*?[") != NULL;
259}
260int strtailcmp(const char *s1, const char *s2);
261char *strxfrchar(char *s, char from, char to);
262unsigned long convert_unit(unsigned long value, char *unit);
263ssize_t readn(int fd, void *buf, size_t n);
264ssize_t writen(int fd, void *buf, size_t n);
265
266struct perf_event_attr;
267
268void event_attr_init(struct perf_event_attr *attr);
269
270#define _STR(x) #x
271#define STR(x) _STR(x)
272
273size_t hex_width(u64 v);
274int hex2u64(const char *ptr, u64 *val);
275
276char *ltrim(char *s);
277char *rtrim(char *s);
278
279void dump_stack(void);
280void sighandler_dump_stack(int sig);
281
282extern unsigned int page_size;
283extern int cacheline_size;
284
285void get_term_dimensions(struct winsize *ws);
286void set_term_quiet_input(struct termios *old);
287
288struct parse_tag {
289 char tag;
290 int mult;
291};
292
293unsigned long parse_tag_value(const char *str, struct parse_tag *tags);
294
295#define SRCLINE_UNKNOWN ((char *) "??:0")
296
297static inline int path__join(char *bf, size_t size,
298 const char *path1, const char *path2)
299{
300 return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2);
301}
302
303static inline int path__join3(char *bf, size_t size,
304 const char *path1, const char *path2,
305 const char *path3)
306{
307 return scnprintf(bf, size, "%s%s%s%s%s",
308 path1, path1[0] ? "/" : "",
309 path2, path2[0] ? "/" : "", path3);
310}
311
312struct dso;
313struct symbol;
314
315extern bool srcline_full_filename;
316char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
317 bool show_sym);
318char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
319 bool show_sym, bool unwind_inlines);
320void free_srcline(char *srcline);
321
322int filename__read_str(const char *filename, char **buf, size_t *sizep);
323int perf_event_paranoid(void);
324
325void mem_bswap_64(void *src, int byte_size);
326void mem_bswap_32(void *src, int byte_size);
327
328const char *get_filename_for_perf_kvm(void);
329bool find_process(const char *name);
330
331#ifdef HAVE_ZLIB_SUPPORT
332int gzip_decompress_to_file(const char *input, int output_fd);
333#endif
334
335#ifdef HAVE_LZMA_SUPPORT
336int lzma_decompress_to_file(const char *input, int output_fd);
337#endif
338
339char *asprintf_expr_inout_ints(const char *var, bool in, size_t nints, int *ints);
340
341static inline char *asprintf_expr_in_ints(const char *var, size_t nints, int *ints)
342{
343 return asprintf_expr_inout_ints(var, true, nints, ints);
344}
345
346static inline char *asprintf_expr_not_in_ints(const char *var, size_t nints, int *ints)
347{
348 return asprintf_expr_inout_ints(var, false, nints, ints);
349}
350
351int get_stack_size(const char *str, unsigned long *_size);
352
353int fetch_kernel_version(unsigned int *puint,
354 char *str, size_t str_sz);
355#define KVER_VERSION(x) (((x) >> 16) & 0xff)
356#define KVER_PATCHLEVEL(x) (((x) >> 8) & 0xff)
357#define KVER_SUBLEVEL(x) ((x) & 0xff)
358#define KVER_FMT "%d.%d.%d"
359#define KVER_PARAM(x) KVER_VERSION(x), KVER_PATCHLEVEL(x), KVER_SUBLEVEL(x)
360
361#endif /* GIT_COMPAT_UTIL_H */