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