bdcceb886f77fc5f8ae91e3d79b2da4ccd11d09c
[linux-3.10.git] / tools / perf / tests / attr.c
1
2 /*
3  * The struct perf_event_attr test support.
4  *
5  * This test is embedded inside into perf directly and is governed
6  * by the PERF_TEST_ATTR environment variable and hook inside
7  * sys_perf_event_open function.
8  *
9  * The general idea is to store 'struct perf_event_attr' details for
10  * each event created within single perf command. Each event details
11  * are stored into separate text file. Once perf command is finished
12  * these files can be checked for values we expect for command.
13  *
14  * Besides 'struct perf_event_attr' values we also store 'fd' and
15  * 'group_fd' values to allow checking for groups created.
16  *
17  * This all is triggered by setting PERF_TEST_ATTR environment variable.
18  * It must contain name of existing directory with access and write
19  * permissions. All the event text files are stored there.
20  */
21
22 /*
23  * Powerpc needs __SANE_USERSPACE_TYPES__ before <linux/types.h> to select
24  * 'int-ll64.h' and avoid compile warnings when printing __u64 with %llu.
25  */
26 #define __SANE_USERSPACE_TYPES__
27 #include <stdlib.h>
28 #include <stdio.h>
29 #include <inttypes.h>
30 #include <linux/types.h>
31 #include <linux/kernel.h>
32 #include "../perf.h"
33 #include "util.h"
34 #include "exec_cmd.h"
35 #include "tests.h"
36
37 #define ENV "PERF_TEST_ATTR"
38
39 extern int verbose;
40
41 static char *dir;
42
43 void test_attr__init(void)
44 {
45         dir = getenv(ENV);
46         test_attr__enabled = (dir != NULL);
47 }
48
49 #define BUFSIZE 1024
50
51 #define __WRITE_ASS(str, fmt, data)                                     \
52 do {                                                                    \
53         char buf[BUFSIZE];                                              \
54         size_t size;                                                    \
55                                                                         \
56         size = snprintf(buf, BUFSIZE, #str "=%"fmt "\n", data);         \
57         if (1 != fwrite(buf, size, 1, file)) {                          \
58                 perror("test attr - failed to write event file");       \
59                 fclose(file);                                           \
60                 return -1;                                              \
61         }                                                               \
62                                                                         \
63 } while (0)
64
65 #define WRITE_ASS(field, fmt) __WRITE_ASS(field, fmt, attr->field)
66
67 static int store_event(struct perf_event_attr *attr, pid_t pid, int cpu,
68                        int fd, int group_fd, unsigned long flags)
69 {
70         FILE *file;
71         char path[PATH_MAX];
72
73         snprintf(path, PATH_MAX, "%s/event-%d-%llu-%d", dir,
74                  attr->type, attr->config, fd);
75
76         file = fopen(path, "w+");
77         if (!file) {
78                 perror("test attr - failed to open event file");
79                 return -1;
80         }
81
82         if (fprintf(file, "[event-%d-%llu-%d]\n",
83                     attr->type, attr->config, fd) < 0) {
84                 perror("test attr - failed to write event file");
85                 fclose(file);
86                 return -1;
87         }
88
89         /* syscall arguments */
90         __WRITE_ASS(fd,       "d", fd);
91         __WRITE_ASS(group_fd, "d", group_fd);
92         __WRITE_ASS(cpu,      "d", cpu);
93         __WRITE_ASS(pid,      "d", pid);
94         __WRITE_ASS(flags,   "lu", flags);
95
96         /* struct perf_event_attr */
97         WRITE_ASS(type,   PRIu32);
98         WRITE_ASS(size,   PRIu32);
99         WRITE_ASS(config,  "llu");
100         WRITE_ASS(sample_period, "llu");
101         WRITE_ASS(sample_type,   "llu");
102         WRITE_ASS(read_format,   "llu");
103         WRITE_ASS(disabled,       "d");
104         WRITE_ASS(inherit,        "d");
105         WRITE_ASS(pinned,         "d");
106         WRITE_ASS(exclusive,      "d");
107         WRITE_ASS(exclude_user,   "d");
108         WRITE_ASS(exclude_kernel, "d");
109         WRITE_ASS(exclude_hv,     "d");
110         WRITE_ASS(exclude_idle,   "d");
111         WRITE_ASS(mmap,           "d");
112         WRITE_ASS(comm,           "d");
113         WRITE_ASS(freq,           "d");
114         WRITE_ASS(inherit_stat,   "d");
115         WRITE_ASS(enable_on_exec, "d");
116         WRITE_ASS(task,           "d");
117         WRITE_ASS(watermark,      "d");
118         WRITE_ASS(precise_ip,     "d");
119         WRITE_ASS(mmap_data,      "d");
120         WRITE_ASS(sample_id_all,  "d");
121         WRITE_ASS(exclude_host,   "d");
122         WRITE_ASS(exclude_guest,  "d");
123         WRITE_ASS(exclude_callchain_kernel, "d");
124         WRITE_ASS(exclude_callchain_user, "d");
125         WRITE_ASS(wakeup_events, PRIu32);
126         WRITE_ASS(bp_type, PRIu32);
127         WRITE_ASS(config1, "llu");
128         WRITE_ASS(config2, "llu");
129         WRITE_ASS(branch_sample_type, "llu");
130         WRITE_ASS(sample_regs_user,   "llu");
131         WRITE_ASS(sample_stack_user,  PRIu32);
132
133         fclose(file);
134         return 0;
135 }
136
137 void test_attr__open(struct perf_event_attr *attr, pid_t pid, int cpu,
138                      int fd, int group_fd, unsigned long flags)
139 {
140         int errno_saved = errno;
141
142         if (store_event(attr, pid, cpu, fd, group_fd, flags))
143                 die("test attr FAILED");
144
145         errno = errno_saved;
146 }
147
148 static int run_dir(const char *d, const char *perf)
149 {
150         char cmd[3*PATH_MAX];
151
152         snprintf(cmd, 3*PATH_MAX, PYTHON " %s/attr.py -d %s/attr/ -p %s %s",
153                  d, d, perf, verbose ? "-v" : "");
154
155         return system(cmd);
156 }
157
158 int test__attr(void)
159 {
160         struct stat st;
161         char path_perf[PATH_MAX];
162         char path_dir[PATH_MAX];
163
164         /* First try developement tree tests. */
165         if (!lstat("./tests", &st))
166                 return run_dir("./tests", "./perf");
167
168         /* Then installed path. */
169         snprintf(path_dir,  PATH_MAX, "%s/tests", perf_exec_path());
170         snprintf(path_perf, PATH_MAX, "%s/perf", BINDIR);
171
172         if (!lstat(path_dir, &st) &&
173             !lstat(path_perf, &st))
174                 return run_dir(path_dir, path_perf);
175
176         fprintf(stderr, " (ommitted)");
177         return 0;
178 }