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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __PERF_UTIL_H
3#define __PERF_UTIL_H
4
5#define _BSD_SOURCE 1
6/* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
7#define _DEFAULT_SOURCE 1
8
9#include <dirent.h>
10#include <fcntl.h>
11#include <stdbool.h>
12#include <stddef.h>
13#include <linux/compiler.h>
14#include <linux/bitmap.h>
15#include <sys/types.h>
16#ifndef __cplusplus
17#include <internal/cpumap.h>
18#endif
19
20extern const char perf_usage_string[];
21extern const char perf_more_info_string[];
22
23extern const char *input_name;
24
25/* This will control if perf_{host,guest} will set attr.exclude_{host,guest}. */
26extern bool exclude_GH_default;
27
28extern bool perf_host;
29extern bool perf_guest;
30
31/* General helper functions */
32void usage(const char *err) __noreturn;
33
34struct dirent;
35struct strlist;
36
37int mkdir_p(char *path, mode_t mode);
38int rm_rf(const char *path);
39int rm_rf_perf_data(const char *path);
40struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *));
41bool lsdir_no_dot_filter(const char *name, struct dirent *d);
42
43size_t hex_width(u64 v);
44
45int sysctl__max_stack(void);
46
47bool sysctl__nmi_watchdog_enabled(void);
48
49int perf_tip(char **strp, const char *dirpath);
50
51void cpumask_to_cpulist(char *cpumask, char *cpulist);
52
53void print_separator2(int pre_dash_cnt, const char *s, int post_dash_cnt);
54
55#ifndef HAVE_SCHED_GETCPU_SUPPORT
56int sched_getcpu(void);
57#endif
58
59#ifndef HAVE_SCANDIRAT_SUPPORT
60int scandirat(int dirfd, const char *dirp,
61 struct dirent ***namelist,
62 int (*filter)(const struct dirent *),
63 int (*compar)(const struct dirent **, const struct dirent **));
64#endif
65
66extern bool perf_singlethreaded;
67
68void perf_set_singlethreaded(void);
69void perf_set_multithreaded(void);
70
71char *perf_exe(char *buf, int len);
72
73#ifndef O_CLOEXEC
74#ifdef __sparc__
75#define O_CLOEXEC 0x400000
76#elif defined(__alpha__) || defined(__hppa__)
77#define O_CLOEXEC 010000000
78#else
79#define O_CLOEXEC 02000000
80#endif
81#endif
82
83struct perf_debuginfod {
84 const char *urls;
85 bool set;
86};
87void perf_debuginfod_setup(struct perf_debuginfod *di);
88
89const char *perf_basename(const char *path);
90
91char *filename_with_chroot(int pid, const char *filename);
92
93int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x,
94 size_t msz, const void *init_val);
95
96#define realloc_array_as_needed(a, n, x, v) ({ \
97 typeof(x) __x = (x); \
98 __x >= (n) ? \
99 do_realloc_array_as_needed((void **)&(a), \
100 &(n), \
101 __x, \
102 sizeof(*(a)), \
103 (const void *)(v)) : \
104 0; \
105 })
106
107static inline bool host_is_bigendian(void)
108{
109#ifdef __BYTE_ORDER__
110#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
111 return false;
112#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
113 return true;
114#else
115#error "Unrecognized __BYTE_ORDER__"
116#endif
117#else /* !__BYTE_ORDER__ */
118 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0};
119 unsigned int *ptr;
120
121 ptr = (unsigned int *)(void *)str;
122 return *ptr == 0x01020304;
123#endif
124}
125
126#endif /* __PERF_UTIL_H */