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Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux...
[linux.git] / tools / perf / arch / x86 / tests / sample-parsing.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <stdbool.h>
3 #include <inttypes.h>
4 #include <stdlib.h>
5 #include <string.h>
6 #include <linux/bitops.h>
7 #include <linux/kernel.h>
8 #include <linux/types.h>
9
10 #include "event.h"
11 #include "evsel.h"
12 #include "debug.h"
13 #include "util/sample.h"
14 #include "util/synthetic-events.h"
15
16 #include "tests/tests.h"
17 #include "arch-tests.h"
18
19 #define COMP(m) do {                                    \
20         if (s1->m != s2->m) {                           \
21                 pr_debug("Samples differ at '"#m"'\n"); \
22                 return false;                           \
23         }                                               \
24 } while (0)
25
26 static bool samples_same(const struct perf_sample *s1,
27                          const struct perf_sample *s2,
28                          u64 type)
29 {
30         if (type & PERF_SAMPLE_WEIGHT_STRUCT) {
31                 COMP(ins_lat);
32                 COMP(retire_lat);
33         }
34
35         return true;
36 }
37
38 static int do_test(u64 sample_type)
39 {
40         struct evsel evsel = {
41                 .needs_swap = false,
42                 .core = {
43                         . attr = {
44                                 .sample_type = sample_type,
45                                 .read_format = 0,
46                         },
47                 },
48         };
49         union perf_event *event;
50         struct perf_sample sample = {
51                 .weight         = 101,
52                 .ins_lat        = 102,
53                 .retire_lat     = 103,
54         };
55         struct perf_sample sample_out;
56         size_t i, sz, bufsz;
57         int err, ret = -1;
58
59         sz = perf_event__sample_event_size(&sample, sample_type, 0);
60         bufsz = sz + 4096; /* Add a bit for overrun checking */
61         event = malloc(bufsz);
62         if (!event) {
63                 pr_debug("malloc failed\n");
64                 return -1;
65         }
66
67         memset(event, 0xff, bufsz);
68         event->header.type = PERF_RECORD_SAMPLE;
69         event->header.misc = 0;
70         event->header.size = sz;
71
72         err = perf_event__synthesize_sample(event, sample_type, 0, &sample);
73         if (err) {
74                 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
75                          "perf_event__synthesize_sample", sample_type, err);
76                 goto out_free;
77         }
78
79         /* The data does not contain 0xff so we use that to check the size */
80         for (i = bufsz; i > 0; i--) {
81                 if (*(i - 1 + (u8 *)event) != 0xff)
82                         break;
83         }
84         if (i != sz) {
85                 pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
86                          i, sz);
87                 goto out_free;
88         }
89
90         evsel.sample_size = __evsel__sample_size(sample_type);
91
92         err = evsel__parse_sample(&evsel, event, &sample_out);
93         if (err) {
94                 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
95                          "evsel__parse_sample", sample_type, err);
96                 goto out_free;
97         }
98
99         if (!samples_same(&sample, &sample_out, sample_type)) {
100                 pr_debug("parsing failed for sample_type %#"PRIx64"\n",
101                          sample_type);
102                 goto out_free;
103         }
104
105         ret = 0;
106 out_free:
107         free(event);
108
109         return ret;
110 }
111
112 /**
113  * test__x86_sample_parsing - test X86 specific sample parsing
114  *
115  * This function implements a test that synthesizes a sample event, parses it
116  * and then checks that the parsed sample matches the original sample. If the
117  * test passes %0 is returned, otherwise %-1 is returned.
118  *
119  * For now, the PERF_SAMPLE_WEIGHT_STRUCT is the only X86 specific sample type.
120  * The test only checks the PERF_SAMPLE_WEIGHT_STRUCT type.
121  */
122 int test__x86_sample_parsing(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
123 {
124         return do_test(PERF_SAMPLE_WEIGHT_STRUCT);
125 }
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