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 19extern const char perf_usage_string[]; 20extern const char perf_more_info_string[]; 21 22extern const char *input_name; 23 24extern bool perf_host; 25extern bool perf_guest; 26 27/* General helper functions */ 28void usage(const char *err) __noreturn; 29void die(const char *err, ...) __noreturn __printf(1, 2); 30 31struct dirent; 32struct strlist; 33 34int mkdir_p(char *path, mode_t mode); 35int rm_rf(const char *path); 36int rm_rf_perf_data(const char *path); 37struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *)); 38bool lsdir_no_dot_filter(const char *name, struct dirent *d); 39 40size_t hex_width(u64 v); 41 42int sysctl__max_stack(void); 43 44bool sysctl__nmi_watchdog_enabled(void); 45 46int 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 54int perf_tip(char **strp, const char *dirpath); 55 56#ifndef HAVE_SCHED_GETCPU_SUPPORT 57int sched_getcpu(void); 58#endif 59 60#ifndef HAVE_SCANDIRAT_SUPPORT 61int 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 67extern bool perf_singlethreaded; 68 69void perf_set_singlethreaded(void); 70void perf_set_multithreaded(void); 71 72char *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 84extern bool test_attr__enabled; 85void test_attr__ready(void); 86void test_attr__init(void); 87struct perf_event_attr; 88void 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 91struct perf_debuginfod { 92 const char *urls; 93 bool set; 94}; 95void perf_debuginfod_setup(struct perf_debuginfod *di); 96 97char *filename_with_chroot(int pid, const char *filename); 98 99int 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 113static 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