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
syscall_arg__scnprintf_perf_flags(char * bf,size_t size,struct syscall_arg * arg)18 static 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(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
42
43 return printed;
44 }
45
46 #define SCA_PERF_FLAGS syscall_arg__scnprintf_perf_flags
47
48 struct attr_fprintf_args {
49 size_t size, printed;
50 char *bf;
51 bool first;
52 };
53
attr__fprintf(FILE * fp __maybe_unused,const char * name,const char * val,void * priv)54 static 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(args->bf + args->printed , args->size - args->printed, "%s%s: %s", args->first ? "" : ", ", name, val);
58
59 args->first = false;
60 args->printed += printed;
61 return printed;
62 }
63
perf_event_attr___scnprintf(struct perf_event_attr * attr,char * bf,size_t size,bool show_zeros __maybe_unused)64 static 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(bf, size, "{ "),
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(bf + args.printed, size - args.printed, " }");
75 }
76
syscall_arg__scnprintf_augmented_perf_event_attr(struct syscall_arg * arg,char * bf,size_t size)77 static 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((void *)arg->augmented.args->value, bf, size, arg->trace->show_zeros);
80 }
81
syscall_arg__scnprintf_perf_event_attr(char * bf,size_t size,struct syscall_arg * arg)82 static 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(bf, size, "%#lx", arg->val);
88 }
89
90 #define SCA_PERF_ATTR syscall_arg__scnprintf_perf_event_attr
91 // 'argname' is just documentational at this point, to remove the previous comment with that info
92 #define SCA_PERF_ATTR_FROM_USER(argname) \
93 { .scnprintf = SCA_PERF_ATTR, \
94 .from_user = true, }
95