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 <sys/types.h>
15 #ifndef __cplusplus
16 #include <internal/cpumap.h>
17 #endif
18
19 extern const char perf_usage_string[];
20 extern const char perf_more_info_string[];
21
22 extern const char *input_name;
23
24 extern bool perf_host;
25 extern bool perf_guest;
26
27 /* General helper functions */
28 void usage(const char *err) __noreturn;
29 void die(const char *err, ...) __noreturn __printf(1, 2);
30
31 struct dirent;
32 struct strlist;
33
34 int mkdir_p(char *path, mode_t mode);
35 int rm_rf(const char *path);
36 int rm_rf_perf_data(const char *path);
37 struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *));
38 bool lsdir_no_dot_filter(const char *name, struct dirent *d);
39
40 size_t hex_width(u64 v);
41
42 int sysctl__max_stack(void);
43
44 bool sysctl__nmi_watchdog_enabled(void);
45
46 int fetch_kernel_version(unsigned int *puint,
47 char *str, size_t str_sz);
48 #define KVER_VERSION(x) (((x) >> 16) & 0xff)
49 #define KVER_PATCHLEVEL(x) (((x) >> 8) & 0xff)
50 #define KVER_SUBLEVEL(x) ((x) & 0xff)
51 #define KVER_FMT "%d.%d.%d"
52 #define KVER_PARAM(x) KVER_VERSION(x), KVER_PATCHLEVEL(x), KVER_SUBLEVEL(x)
53
54 int perf_tip(char **strp, const char *dirpath);
55
56 #ifndef HAVE_SCHED_GETCPU_SUPPORT
57 int sched_getcpu(void);
58 #endif
59
60 #ifndef HAVE_SCANDIRAT_SUPPORT
61 int scandirat(int dirfd, const char *dirp,
62 struct dirent ***namelist,
63 int (*filter)(const struct dirent *),
64 int (*compar)(const struct dirent **, const struct dirent **));
65 #endif
66
67 extern bool perf_singlethreaded;
68
69 void perf_set_singlethreaded(void);
70 void perf_set_multithreaded(void);
71
72 char *perf_exe(char *buf, int len);
73
74 #ifndef O_CLOEXEC
75 #ifdef __sparc__
76 #define O_CLOEXEC 0x400000
77 #elif defined(__alpha__) || defined(__hppa__)
78 #define O_CLOEXEC 010000000
79 #else
80 #define O_CLOEXEC 02000000
81 #endif
82 #endif
83
84 extern bool test_attr__enabled;
85 void test_attr__ready(void);
86 void test_attr__init(void);
87 struct perf_event_attr;
88 void test_attr__open(struct perf_event_attr *attr, pid_t pid, struct perf_cpu cpu,
89 int fd, int group_fd, unsigned long flags);
90
91 struct perf_debuginfod {
92 const char *urls;
93 bool set;
94 };
95 void perf_debuginfod_setup(struct perf_debuginfod *di);
96
97 char *filename_with_chroot(int pid, const char *filename);
98
99 int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x,
100 size_t msz, const void *init_val);
101
102 #define realloc_array_as_needed(a, n, x, v) ({ \
103 typeof(x) __x = (x); \
104 __x >= (n) ? \
105 do_realloc_array_as_needed((void **)&(a), \
106 &(n), \
107 __x, \
108 sizeof(*(a)), \
109 (const void *)(v)) : \
110 0; \
111 })
112
113 static inline bool host_is_bigendian(void)
114 {
115 #ifdef __BYTE_ORDER__
116 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
117 return false;
118 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
119 return true;
120 #else
121 #error "Unrecognized __BYTE_ORDER__"
122 #endif
123 #else /* !__BYTE_ORDER__ */
124 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0};
125 unsigned int *ptr;
126
127 ptr = (unsigned int *)(void *)str;
128 return *ptr == 0x01020304;
129 #endif
130 }
131
132 #endif /* __PERF_UTIL_H */
133
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