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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 <sys/types.h>
15#ifndef __cplusplus
16#include <internal/cpumap.h>
17#endif
18
19extern const char perf_usage_string[];
20extern const char perf_more_info_string[];
21
22extern const char *input_name;
23
24/* This will control if perf_{host,guest} will set attr.exclude_{host,guest}. */
25extern bool exclude_GH_default;
26
27extern bool perf_host;
28extern bool perf_guest;
29
30/* General helper functions */
31void usage(const char *err) __noreturn;
32void die(const char *err, ...) __noreturn __printf(1, 2);
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
51#ifndef HAVE_SCHED_GETCPU_SUPPORT
52int sched_getcpu(void);
53#endif
54
55#ifndef HAVE_SCANDIRAT_SUPPORT
56int scandirat(int dirfd, const char *dirp,
57 struct dirent ***namelist,
58 int (*filter)(const struct dirent *),
59 int (*compar)(const struct dirent **, const struct dirent **));
60#endif
61
62extern bool perf_singlethreaded;
63
64void perf_set_singlethreaded(void);
65void perf_set_multithreaded(void);
66
67char *perf_exe(char *buf, int len);
68
69#ifndef O_CLOEXEC
70#ifdef __sparc__
71#define O_CLOEXEC 0x400000
72#elif defined(__alpha__) || defined(__hppa__)
73#define O_CLOEXEC 010000000
74#else
75#define O_CLOEXEC 02000000
76#endif
77#endif
78
79struct perf_debuginfod {
80 const char *urls;
81 bool set;
82};
83void perf_debuginfod_setup(struct perf_debuginfod *di);
84
85char *filename_with_chroot(int pid, const char *filename);
86
87int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x,
88 size_t msz, const void *init_val);
89
90#define realloc_array_as_needed(a, n, x, v) ({ \
91 typeof(x) __x = (x); \
92 __x >= (n) ? \
93 do_realloc_array_as_needed((void **)&(a), \
94 &(n), \
95 __x, \
96 sizeof(*(a)), \
97 (const void *)(v)) : \
98 0; \
99 })
100
101static inline bool host_is_bigendian(void)
102{
103#ifdef __BYTE_ORDER__
104#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
105 return false;
106#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
107 return true;
108#else
109#error "Unrecognized __BYTE_ORDER__"
110#endif
111#else /* !__BYTE_ORDER__ */
112 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0};
113 unsigned int *ptr;
114
115 ptr = (unsigned int *)(void *)str;
116 return *ptr == 0x01020304;
117#endif
118}
119
120#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
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 */