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