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