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 19 extern const char perf_usage_string[]; 20 extern const char perf_more_info_string[]; 21 22 extern const char *input_name; 23 24 /* This will control if perf_{host,guest} will set attr.exclude_{host,guest}. */ 25 extern bool exclude_GH_default; 26 27 extern bool perf_host; 28 extern bool perf_guest; 29 30 /* General helper functions */ 31 void usage(const char *err) __noreturn; 32 void die(const char *err, ...) __noreturn __printf(1, 2); 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 #ifndef HAVE_SCHED_GETCPU_SUPPORT 52 int sched_getcpu(void); 53 #endif 54 55 #ifndef HAVE_SCANDIRAT_SUPPORT 56 int 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 62 extern bool perf_singlethreaded; 63 64 void perf_set_singlethreaded(void); 65 void perf_set_multithreaded(void); 66 67 char *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 79 struct perf_debuginfod { 80 const char *urls; 81 bool set; 82 }; 83 void perf_debuginfod_setup(struct perf_debuginfod *di); 84 85 char *filename_with_chroot(int pid, const char *filename); 86 87 int 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 }) 100 101 static 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 */ 121