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git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/blob - tools/perf/tests/attr.c
2 * The struct perf_event_attr test support.
4 * This test is embedded inside into perf directly and is governed
5 * by the PERF_TEST_ATTR environment variable and hook inside
6 * sys_perf_event_open function.
8 * The general idea is to store 'struct perf_event_attr' details for
9 * each event created within single perf command. Each event details
10 * are stored into separate text file. Once perf command is finished
11 * these files can be checked for values we expect for command.
13 * Besides 'struct perf_event_attr' values we also store 'fd' and
14 * 'group_fd' values to allow checking for groups created.
16 * This all is triggered by setting PERF_TEST_ATTR environment variable.
17 * It must contain name of existing directory with access and write
18 * permissions. All the event text files are stored there.
26 #include <linux/types.h>
27 #include <linux/kernel.h>
28 #include <sys/param.h>
29 #include <sys/types.h>
33 #include <subcmd/exec-cmd.h>
36 #define ENV "PERF_TEST_ATTR"
41 void test_attr__init(void)
44 test_attr__enabled
= (dir
!= NULL
);
49 #define __WRITE_ASS(str, fmt, data) \
54 size = snprintf(buf, BUFSIZE, #str "=%"fmt "\n", data); \
55 if (1 != fwrite(buf, size, 1, file)) { \
56 perror("test attr - failed to write event file"); \
63 #define WRITE_ASS(field, fmt) __WRITE_ASS(field, fmt, attr->field)
65 static int store_event(struct perf_event_attr
*attr
, pid_t pid
, int cpu
,
66 int fd
, int group_fd
, unsigned long flags
)
74 snprintf(path
, PATH_MAX
, "%s/event-%d-%llu-%d", dir
,
75 attr
->type
, attr
->config
, fd
);
77 file
= fopen(path
, "w+");
79 perror("test attr - failed to open event file");
83 if (fprintf(file
, "[event-%d-%llu-%d]\n",
84 attr
->type
, attr
->config
, fd
) < 0) {
85 perror("test attr - failed to write event file");
90 /* syscall arguments */
91 __WRITE_ASS(fd
, "d", fd
);
92 __WRITE_ASS(group_fd
, "d", group_fd
);
93 __WRITE_ASS(cpu
, "d", cpu
);
94 __WRITE_ASS(pid
, "d", pid
);
95 __WRITE_ASS(flags
, "lu", flags
);
97 /* struct perf_event_attr */
98 WRITE_ASS(type
, PRIu32
);
99 WRITE_ASS(size
, PRIu32
);
100 WRITE_ASS(config
, "llu");
101 WRITE_ASS(sample_period
, "llu");
102 WRITE_ASS(sample_type
, "llu");
103 WRITE_ASS(read_format
, "llu");
104 WRITE_ASS(disabled
, "d");
105 WRITE_ASS(inherit
, "d");
106 WRITE_ASS(pinned
, "d");
107 WRITE_ASS(exclusive
, "d");
108 WRITE_ASS(exclude_user
, "d");
109 WRITE_ASS(exclude_kernel
, "d");
110 WRITE_ASS(exclude_hv
, "d");
111 WRITE_ASS(exclude_idle
, "d");
112 WRITE_ASS(mmap
, "d");
113 WRITE_ASS(comm
, "d");
114 WRITE_ASS(freq
, "d");
115 WRITE_ASS(inherit_stat
, "d");
116 WRITE_ASS(enable_on_exec
, "d");
117 WRITE_ASS(task
, "d");
118 WRITE_ASS(watermark
, "d");
119 WRITE_ASS(precise_ip
, "d");
120 WRITE_ASS(mmap_data
, "d");
121 WRITE_ASS(sample_id_all
, "d");
122 WRITE_ASS(exclude_host
, "d");
123 WRITE_ASS(exclude_guest
, "d");
124 WRITE_ASS(exclude_callchain_kernel
, "d");
125 WRITE_ASS(exclude_callchain_user
, "d");
126 WRITE_ASS(wakeup_events
, PRIu32
);
127 WRITE_ASS(bp_type
, PRIu32
);
128 WRITE_ASS(config1
, "llu");
129 WRITE_ASS(config2
, "llu");
130 WRITE_ASS(branch_sample_type
, "llu");
131 WRITE_ASS(sample_regs_user
, "llu");
132 WRITE_ASS(sample_stack_user
, PRIu32
);
138 void test_attr__open(struct perf_event_attr
*attr
, pid_t pid
, int cpu
,
139 int fd
, int group_fd
, unsigned long flags
)
141 int errno_saved
= errno
;
143 if ((fd
!= -1) && store_event(attr
, pid
, cpu
, fd
, group_fd
, flags
)) {
144 pr_err("test attr FAILED");
151 void test_attr__ready(void)
153 if (unlikely(test_attr__enabled
) && !ready
)
157 static int run_dir(const char *d
, const char *perf
)
160 int vcnt
= min(verbose
, (int) sizeof(v
) - 1);
161 char cmd
[3*PATH_MAX
];
166 snprintf(cmd
, 3*PATH_MAX
, PYTHON
" %s/attr.py -d %s/attr/ -p %s %.*s",
167 d
, d
, perf
, vcnt
, v
);
172 int test__attr(struct test
*test __maybe_unused
, int subtest __maybe_unused
)
175 char path_perf
[PATH_MAX
];
176 char path_dir
[PATH_MAX
];
178 /* First try developement tree tests. */
179 if (!lstat("./tests", &st
))
180 return run_dir("./tests", "./perf");
182 /* Then installed path. */
183 snprintf(path_dir
, PATH_MAX
, "%s/tests", get_argv_exec_path());
184 snprintf(path_perf
, PATH_MAX
, "%s/perf", BINDIR
);
186 if (!lstat(path_dir
, &st
) &&
187 !lstat(path_perf
, &st
))
188 return run_dir(path_dir
, path_perf
);