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