1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef GIT_COMPAT_UTIL_H
3 #define GIT_COMPAT_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 
97 #endif /* GIT_COMPAT_UTIL_H */
98