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 <linux/bitmap.h> 15 #include <sys/types.h> 16 #ifndef __cplusplus 17 #include <internal/cpumap.h> 18 #endif 19 20 extern const char perf_usage_string[]; 21 extern const char perf_more_info_string[]; 22 23 extern const char *input_name; 24 25 /* This will control if perf_{host,guest} will set attr.exclude_{host,guest}. */ 26 extern bool exclude_GH_default; 27 28 extern bool perf_host; 29 extern bool perf_guest; 30 31 /* General helper functions */ 32 void usage(const char *err) __noreturn; 33 34 struct dirent; 35 struct strlist; 36 37 int mkdir_p(char *path, mode_t mode); 38 int rm_rf(const char *path); 39 int rm_rf_perf_data(const char *path); 40 struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *)); 41 bool lsdir_no_dot_filter(const char *name, struct dirent *d); 42 43 size_t hex_width(u64 v); 44 45 int sysctl__max_stack(void); 46 47 bool sysctl__nmi_watchdog_enabled(void); 48 49 int perf_tip(char **strp, const char *dirpath); 50 51 void cpumask_to_cpulist(char *cpumask, char *cpulist); 52 53 void print_separator2(int pre_dash_cnt, const char *s, int post_dash_cnt); 54 55 #ifndef HAVE_SCHED_GETCPU_SUPPORT 56 int sched_getcpu(void); 57 #endif 58 59 #ifndef HAVE_SCANDIRAT_SUPPORT 60 int scandirat(int dirfd, const char *dirp, 61 struct dirent ***namelist, 62 int (*filter)(const struct dirent *), 63 int (*compar)(const struct dirent **, const struct dirent **)); 64 #endif 65 66 extern bool perf_singlethreaded; 67 68 void perf_set_singlethreaded(void); 69 void perf_set_multithreaded(void); 70 71 char *perf_exe(char *buf, int len); 72 73 #ifndef O_CLOEXEC 74 #ifdef __sparc__ 75 #define O_CLOEXEC 0x400000 76 #elif defined(__alpha__) || defined(__hppa__) 77 #define O_CLOEXEC 010000000 78 #else 79 #define O_CLOEXEC 02000000 80 #endif 81 #endif 82 83 struct perf_debuginfod { 84 const char *urls; 85 bool set; 86 }; 87 void perf_debuginfod_setup(struct perf_debuginfod *di); 88 89 const char *perf_basename(const char *path); 90 91 char *filename_with_chroot(int pid, const char *filename); 92 93 int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x, 94 size_t msz, const void *init_val); 95 96 #define realloc_array_as_needed(a, n, x, v) ({ \ 97 typeof(x) __x = (x); \ 98 __x >= (n) ? \ 99 do_realloc_array_as_needed((void **)&(a), \ 100 &(n), \ 101 __x, \ 102 sizeof(*(a)), \ 103 (const void *)(v)) : \ 104 0; \ 105 }) 106 107 static inline bool host_is_bigendian(void) 108 { 109 #ifdef __BYTE_ORDER__ 110 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 111 return false; 112 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 113 return true; 114 #else 115 #error "Unrecognized __BYTE_ORDER__" 116 #endif 117 #else /* !__BYTE_ORDER__ */ 118 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0}; 119 unsigned int *ptr; 120 121 ptr = (unsigned int *)(void *)str; 122 return *ptr == 0x01020304; 123 #endif 124 } 125 126 #endif /* __PERF_UTIL_H */ 127