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 18extern const char perf_usage_string[]; 19extern const char perf_more_info_string[]; 20 21extern const char *input_name; 22 23extern bool perf_host; 24extern bool perf_guest; 25 26/* General helper functions */ 27void usage(const char *err) __noreturn; 28void die(const char *err, ...) __noreturn __printf(1, 2); 29 30struct dirent; 31struct strlist; 32 33int mkdir_p(char *path, mode_t mode); 34int rm_rf(const char *path); 35int rm_rf_perf_data(const char *path); 36struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *)); 37bool lsdir_no_dot_filter(const char *name, struct dirent *d); 38 39size_t hex_width(u64 v); 40 41int sysctl__max_stack(void); 42 43bool sysctl__nmi_watchdog_enabled(void); 44 45int 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 53int perf_tip(char **strp, const char *dirpath); 54 55#ifndef HAVE_SCHED_GETCPU_SUPPORT 56int sched_getcpu(void); 57#endif 58 59extern bool perf_singlethreaded; 60 61void perf_set_singlethreaded(void); 62void perf_set_multithreaded(void); 63 64char *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 76extern bool test_attr__enabled; 77void test_attr__ready(void); 78void test_attr__init(void); 79struct perf_event_attr; 80void 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 83struct perf_debuginfod { 84 const char *urls; 85 bool set; 86}; 87void perf_debuginfod_setup(struct perf_debuginfod *di); 88 89char *filename_with_chroot(int pid, const char *filename); 90 91int 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 105static 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