1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _PERF_TARGET_H 3 #define _PERF_TARGET_H 4 5 #include <stdbool.h> 6 #include <sys/types.h> 7 8 struct target { 9 const char *pid; 10 const char *tid; 11 const char *cpu_list; 12 const char *uid_str; 13 const char *bpf_str; 14 uid_t uid; 15 bool system_wide; 16 bool uses_mmap; 17 bool default_per_cpu; 18 bool per_thread; 19 bool use_bpf; 20 bool inherit; 21 int initial_delay; 22 const char *attr_map; 23 }; 24 25 enum target_errno { 26 TARGET_ERRNO__SUCCESS = 0, 27 28 /* 29 * Choose an arbitrary negative big number not to clash with standard 30 * errno since SUS requires the errno has distinct positive values. 31 * See 'Issue 6' in the link below. 32 * 33 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html 34 */ 35 __TARGET_ERRNO__START = -10000, 36 37 /* for target__validate() */ 38 TARGET_ERRNO__PID_OVERRIDE_CPU = __TARGET_ERRNO__START, 39 TARGET_ERRNO__PID_OVERRIDE_UID, 40 TARGET_ERRNO__UID_OVERRIDE_CPU, 41 TARGET_ERRNO__PID_OVERRIDE_SYSTEM, 42 TARGET_ERRNO__UID_OVERRIDE_SYSTEM, 43 TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD, 44 TARGET_ERRNO__BPF_OVERRIDE_CPU, 45 TARGET_ERRNO__BPF_OVERRIDE_PID, 46 TARGET_ERRNO__BPF_OVERRIDE_UID, 47 TARGET_ERRNO__BPF_OVERRIDE_THREAD, 48 49 /* for target__parse_uid() */ 50 TARGET_ERRNO__INVALID_UID, 51 TARGET_ERRNO__USER_NOT_FOUND, 52 53 __TARGET_ERRNO__END, 54 }; 55 56 enum target_errno target__validate(struct target *target); 57 enum target_errno target__parse_uid(struct target *target); 58 59 int target__strerror(struct target *target, int errnum, char *buf, size_t buflen); 60 61 static inline bool target__has_task(struct target *target) 62 { 63 return target->tid || target->pid || target->uid_str; 64 } 65 66 static inline bool target__has_cpu(struct target *target) 67 { 68 return target->system_wide || target->cpu_list; 69 } 70 71 static inline bool target__none(struct target *target) 72 { 73 return !target__has_task(target) && !target__has_cpu(target); 74 } 75 76 static inline bool target__enable_on_exec(struct target *target) 77 { 78 /* 79 * Normally enable_on_exec should be set if: 80 * 1) The tracee process is forked (not attaching to existed task or cpu). 81 * 2) And initial_delay is not configured. 82 * Otherwise, we enable tracee events manually. 83 */ 84 return target__none(target) && !target->initial_delay; 85 } 86 87 static inline bool target__has_per_thread(struct target *target) 88 { 89 return target->system_wide && target->per_thread; 90 } 91 92 static inline bool target__uses_dummy_map(struct target *target) 93 { 94 bool use_dummy = false; 95 96 if (target->default_per_cpu) 97 use_dummy = target->per_thread ? true : false; 98 else if (target__has_task(target) || 99 (!target__has_cpu(target) && !target->uses_mmap)) 100 use_dummy = true; 101 else if (target__has_per_thread(target)) 102 use_dummy = true; 103 104 return use_dummy; 105 } 106 107 #endif /* _PERF_TARGET_H */ 108