1// SPDX-License-Identifier: LGPL-2.1
2#ifndef PERF_FLAG_FD_NO_GROUP
3# define PERF_FLAG_FD_NO_GROUP (1UL << 0)
4#endif
5
6#ifndef PERF_FLAG_FD_OUTPUT
7# define PERF_FLAG_FD_OUTPUT (1UL << 1)
8#endif
9
10#ifndef PERF_FLAG_PID_CGROUP
11# define PERF_FLAG_PID_CGROUP (1UL << 2) /* pid=cgroup id, per-cpu mode only */
12#endif
13
14#ifndef PERF_FLAG_FD_CLOEXEC
15# define PERF_FLAG_FD_CLOEXEC (1UL << 3) /* O_CLOEXEC */
16#endif
17
18static size_t syscall_arg__scnprintf_perf_flags(char *bf, size_t size,
19 struct syscall_arg *arg)
20{
21 bool show_prefix = arg->show_string_prefix;
22 const char *prefix = "PERF_";
23 int printed = 0, flags = arg->val;
24
25 if (flags == 0)
26 return 0;
27
28#define P_FLAG(n) \
29 if (flags & PERF_FLAG_##n) { \
30 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
31 flags &= ~PERF_FLAG_##n; \
32 }
33
34 P_FLAG(FD_NO_GROUP);
35 P_FLAG(FD_OUTPUT);
36 P_FLAG(PID_CGROUP);
37 P_FLAG(FD_CLOEXEC);
38#undef P_FLAG
39
40 if (flags)
41 printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "%s%#x", printed ? "|" : "", flags);
42
43 return printed;
44}
45
46#define SCA_PERF_FLAGS syscall_arg__scnprintf_perf_flags
47
48struct attr_fprintf_args {
49 size_t size, printed;
50 char *bf;
51 bool first;
52};
53
54static int attr__fprintf(FILE *fp __maybe_unused, const char *name, const char *val, void *priv)
55{
56 struct attr_fprintf_args *args = priv;
57 size_t printed = scnprintf(buf: args->bf + args->printed , size: args->size - args->printed, fmt: "%s%s: %s", args->first ? "" : ", ", name, val);
58
59 args->first = false;
60 args->printed += printed;
61 return printed;
62}
63
64static size_t perf_event_attr___scnprintf(struct perf_event_attr *attr, char *bf, size_t size, bool show_zeros __maybe_unused)
65{
66 struct attr_fprintf_args args = {
67 .printed = scnprintf(buf: bf, size, fmt: "{ "),
68 .size = size,
69 .first = true,
70 .bf = bf,
71 };
72
73 perf_event_attr__fprintf(stdout, attr, attr__fprintf, &args);
74 return args.printed + scnprintf(buf: bf + args.printed, size: size - args.printed, fmt: " }");
75}
76
77static size_t syscall_arg__scnprintf_augmented_perf_event_attr(struct syscall_arg *arg, char *bf, size_t size)
78{
79 return perf_event_attr___scnprintf(attr: (void *)arg->augmented.args, bf, size, show_zeros: arg->trace->show_zeros);
80}
81
82static size_t syscall_arg__scnprintf_perf_event_attr(char *bf, size_t size, struct syscall_arg *arg)
83{
84 if (arg->augmented.args)
85 return syscall_arg__scnprintf_augmented_perf_event_attr(arg, bf, size);
86
87 return scnprintf(buf: bf, size, fmt: "%#lx", arg->val);
88}
89
90#define SCA_PERF_ATTR syscall_arg__scnprintf_perf_event_attr
91

source code of linux/tools/perf/trace/beauty/perf_event_open.c