projects/linux·blob master · refs

98 lines · 2.4 KiB

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