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
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