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 void die(const char *err, ...) __noreturn __printf(1, 2); 34 35 struct dirent; 36 struct strlist; 37 38 int mkdir_p(char *path, mode_t mode); 39 int rm_rf(const char *path); 40 int rm_rf_perf_data(const char *path); 41 struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *)); 42 bool lsdir_no_dot_filter(const char *name, struct dirent *d); 43 44 size_t hex_width(u64 v); 45 46 int sysctl__max_stack(void); 47 48 bool sysctl__nmi_watchdog_enabled(void); 49 50 int perf_tip(char **strp, const char *dirpath); 51 52 void cpumask_to_cpulist(char *cpumask, char *cpulist); 53 54 #ifndef HAVE_SCHED_GETCPU_SUPPORT 55 int sched_getcpu(void); 56 #endif 57 58 #ifndef HAVE_SCANDIRAT_SUPPORT 59 int scandirat(int dirfd, const char *dirp, 60 struct dirent ***namelist, 61 int (*filter)(const struct dirent *), 62 int (*compar)(const struct dirent **, const struct dirent **)); 63 #endif 64 65 extern bool perf_singlethreaded; 66 67 void perf_set_singlethreaded(void); 68 void perf_set_multithreaded(void); 69 70 char *perf_exe(char *buf, int len); 71 72 #ifndef O_CLOEXEC 73 #ifdef __sparc__ 74 #define O_CLOEXEC 0x400000 75 #elif defined(__alpha__) || defined(__hppa__) 76 #define O_CLOEXEC 010000000 77 #else 78 #define O_CLOEXEC 02000000 79 #endif 80 #endif 81 82 struct perf_debuginfod { 83 const char *urls; 84 bool set; 85 }; 86 void perf_debuginfod_setup(struct perf_debuginfod *di); 87 88 char *filename_with_chroot(int pid, const char *filename); 89 90 int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x, 91 size_t msz, const void *init_val); 92 93 #define realloc_array_as_needed(a, n, x, v) ({ \ 94 typeof(x) __x = (x); \ 95 __x >= (n) ? \ 96 do_realloc_array_as_needed((void **)&(a), \ 97 &(n), \ 98 __x, \ 99 sizeof(*(a)), \ 100 (const void *)(v)) : \ 101 0; \ 102 }) 103 104 static inline bool host_is_bigendian(void) 105 { 106 #ifdef __BYTE_ORDER__ 107 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 108 return false; 109 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 110 return true; 111 #else 112 #error "Unrecognized __BYTE_ORDER__" 113 #endif 114 #else /* !__BYTE_ORDER__ */ 115 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0}; 116 unsigned int *ptr; 117 118 ptr = (unsigned int *)(void *)str; 119 return *ptr == 0x01020304; 120 #endif 121 } 122 123 #endif /* __PERF_UTIL_H */ 124