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 extern bool perf_host; 25 extern bool perf_guest; 26 27 /* General helper functions */ 28 void usage(const char *err) __noreturn; 29 void die(const char *err, ...) __noreturn __printf(1, 2); 30 31 struct dirent; 32 struct strlist; 33 34 int mkdir_p(char *path, mode_t mode); 35 int rm_rf(const char *path); 36 int rm_rf_perf_data(const char *path); 37 struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *)); 38 bool lsdir_no_dot_filter(const char *name, struct dirent *d); 39 40 size_t hex_width(u64 v); 41 42 int sysctl__max_stack(void); 43 44 bool sysctl__nmi_watchdog_enabled(void); 45 46 int fetch_kernel_version(unsigned int *puint, 47 char *str, size_t str_sz); 48 #define KVER_VERSION(x) (((x) >> 16) & 0xff) 49 #define KVER_PATCHLEVEL(x) (((x) >> 8) & 0xff) 50 #define KVER_SUBLEVEL(x) ((x) & 0xff) 51 #define KVER_FMT "%d.%d.%d" 52 #define KVER_PARAM(x) KVER_VERSION(x), KVER_PATCHLEVEL(x), KVER_SUBLEVEL(x) 53 54 int perf_tip(char **strp, const char *dirpath); 55 56 #ifndef HAVE_SCHED_GETCPU_SUPPORT 57 int sched_getcpu(void); 58 #endif 59 60 #ifndef HAVE_SCANDIRAT_SUPPORT 61 int scandirat(int dirfd, const char *dirp, 62 struct dirent ***namelist, 63 int (*filter)(const struct dirent *), 64 int (*compar)(const struct dirent **, const struct dirent **)); 65 #endif 66 67 extern bool perf_singlethreaded; 68 69 void perf_set_singlethreaded(void); 70 void perf_set_multithreaded(void); 71 72 char *perf_exe(char *buf, int len); 73 74 #ifndef O_CLOEXEC 75 #ifdef __sparc__ 76 #define O_CLOEXEC 0x400000 77 #elif defined(__alpha__) || defined(__hppa__) 78 #define O_CLOEXEC 010000000 79 #else 80 #define O_CLOEXEC 02000000 81 #endif 82 #endif 83 84 extern bool test_attr__enabled; 85 void test_attr__ready(void); 86 void test_attr__init(void); 87 struct perf_event_attr; 88 void test_attr__open(struct perf_event_attr *attr, pid_t pid, struct perf_cpu cpu, 89 int fd, int group_fd, unsigned long flags); 90 91 struct perf_debuginfod { 92 const char *urls; 93 bool set; 94 }; 95 void perf_debuginfod_setup(struct perf_debuginfod *di); 96 97 char *filename_with_chroot(int pid, const char *filename); 98 99 int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x, 100 size_t msz, const void *init_val); 101 102 #define realloc_array_as_needed(a, n, x, v) ({ \ 103 typeof(x) __x = (x); \ 104 __x >= (n) ? \ 105 do_realloc_array_as_needed((void **)&(a), \ 106 &(n), \ 107 __x, \ 108 sizeof(*(a)), \ 109 (const void *)(v)) : \ 110 0; \ 111 }) 112 113 static inline bool host_is_bigendian(void) 114 { 115 #ifdef __BYTE_ORDER__ 116 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 117 return false; 118 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 119 return true; 120 #else 121 #error "Unrecognized __BYTE_ORDER__" 122 #endif 123 #else /* !__BYTE_ORDER__ */ 124 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0}; 125 unsigned int *ptr; 126 127 ptr = (unsigned int *)(void *)str; 128 return *ptr == 0x01020304; 129 #endif 130 } 131 132 #endif /* __PERF_UTIL_H */ 133