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 | extern const char perf_usage_string[]; |
19 | extern const char perf_more_info_string[]; |
20 | |
21 | extern const char *input_name; |
22 | |
23 | extern bool perf_host; |
24 | extern bool perf_guest; |
25 | |
26 | /* General helper functions */ |
27 | void usage(const char *err) __noreturn; |
28 | void die(const char *err, ...) __noreturn __printf(1, 2); |
29 | |
30 | struct dirent; |
31 | struct strlist; |
32 | |
33 | int mkdir_p(char *path, mode_t mode); |
34 | int rm_rf(const char *path); |
35 | int rm_rf_perf_data(const char *path); |
36 | struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *)); |
37 | bool lsdir_no_dot_filter(const char *name, struct dirent *d); |
38 | |
39 | size_t hex_width(u64 v); |
40 | |
41 | int sysctl__max_stack(void); |
42 | |
43 | bool sysctl__nmi_watchdog_enabled(void); |
44 | |
45 | int 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 | |
53 | int perf_tip(char **strp, const char *dirpath); |
54 | |
55 | #ifndef HAVE_SCHED_GETCPU_SUPPORT |
56 | int sched_getcpu(void); |
57 | #endif |
58 | |
59 | extern bool perf_singlethreaded; |
60 | |
61 | void perf_set_singlethreaded(void); |
62 | void perf_set_multithreaded(void); |
63 | |
64 | char *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 | |
76 | extern bool test_attr__enabled; |
77 | void test_attr__ready(void); |
78 | void test_attr__init(void); |
79 | struct perf_event_attr; |
80 | void 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 | |
83 | struct perf_debuginfod { |
84 | const char *urls; |
85 | bool set; |
86 | }; |
87 | void perf_debuginfod_setup(struct perf_debuginfod *di); |
88 | |
89 | char *filename_with_chroot(int pid, const char *filename); |
90 | |
91 | int 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 | |
105 | static 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 */ |
125 | |