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 <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 extern const char perf_usage_string[]; 19 extern const char perf_more_info_string[]; 20 21 extern const char *input_name; 22 23 extern bool perf_host; 24 extern bool perf_guest; 25 26 /* General helper functions */ 27 void usage(const char *err) __noreturn; 28 void die(const char *err, ...) __noreturn __printf(1, 2); 29 30 struct dirent; 31 struct strlist; 32 33 int mkdir_p(char *path, mode_t mode); 34 int rm_rf(const char *path); 35 int rm_rf_perf_data(const char *path); 36 struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *)); 37 bool lsdir_no_dot_filter(const char *name, struct dirent *d); 38 39 size_t hex_width(u64 v); 40 41 int sysctl__max_stack(void); 42 43 bool sysctl__nmi_watchdog_enabled(void); 44 45 int fetch_kernel_version(unsigned int *puint, 46 char *str, size_t str_sz); 47 #define KVER_VERSION(x) (((x) >> 16) & 0xff) 48 #define KVER_PATCHLEVEL(x) (((x) >> 8) & 0xff) 49 #define KVER_SUBLEVEL(x) ((x) & 0xff) 50 #define KVER_FMT "%d.%d.%d" 51 #define KVER_PARAM(x) KVER_VERSION(x), KVER_PATCHLEVEL(x), KVER_SUBLEVEL(x) 52 53 int perf_tip(char **strp, const char *dirpath); 54 55 #ifndef HAVE_SCHED_GETCPU_SUPPORT 56 int sched_getcpu(void); 57 #endif 58 59 extern bool perf_singlethreaded; 60 61 void perf_set_singlethreaded(void); 62 void perf_set_multithreaded(void); 63 64 char *perf_exe(char *buf, int len); 65 66 #ifndef O_CLOEXEC 67 #ifdef __sparc__ 68 #define O_CLOEXEC 0x400000 69 #elif defined(__alpha__) || defined(__hppa__) 70 #define O_CLOEXEC 010000000 71 #else 72 #define O_CLOEXEC 02000000 73 #endif 74 #endif 75 76 extern bool test_attr__enabled; 77 void test_attr__ready(void); 78 void test_attr__init(void); 79 struct perf_event_attr; 80 void test_attr__open(struct perf_event_attr *attr, pid_t pid, struct perf_cpu cpu, 81 int fd, int group_fd, unsigned long flags); 82 83 struct perf_debuginfod { 84 const char *urls; 85 bool set; 86 }; 87 void perf_debuginfod_setup(struct perf_debuginfod *di); 88 89 char *filename_with_chroot(int pid, const char *filename); 90 91 int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x, 92 size_t msz, const void *init_val); 93 94 #define realloc_array_as_needed(a, n, x, v) ({ \ 95 typeof(x) __x = (x); \ 96 __x >= (n) ? \ 97 do_realloc_array_as_needed((void **)&(a), \ 98 &(n), \ 99 __x, \ 100 sizeof(*(a)), \ 101 (const void *)(v)) : \ 102 0; \ 103 }) 104 105 static inline bool host_is_bigendian(void) 106 { 107 #ifdef __BYTE_ORDER__ 108 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 109 return false; 110 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 111 return true; 112 #else 113 #error "Unrecognized __BYTE_ORDER__" 114 #endif 115 #else /* !__BYTE_ORDER__ */ 116 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0}; 117 unsigned int *ptr; 118 119 ptr = (unsigned int *)(void *)str; 120 return *ptr == 0x01020304; 121 #endif 122 } 123 124 #endif /* __PERF_UTIL_H */ 125