1 /*
2 * builtin-buildid-list.c
3 *
4 * Builtin buildid-list command: list buildids in perf.data, in the running
5 * kernel and in ELF files.
6 *
7 * Copyright (C) 2009, Red Hat Inc.
8 * Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>
9 */
10 #include "builtin.h"
11 #include "perf.h"
12 #include "util/build-id.h"
13 #include "util/debug.h"
14 #include "util/dso.h"
15 #include <subcmd/pager.h>
16 #include <subcmd/parse-options.h>
17 #include "util/session.h"
18 #include "util/symbol.h"
19 #include "util/data.h"
20 #include <errno.h>
21 #include <linux/err.h>
22
23 static int sysfs__fprintf_build_id(FILE *fp)
24 {
25 char sbuild_id[SBUILD_ID_SIZE];
26 int ret;
27
28 ret = sysfs__sprintf_build_id("/", sbuild_id);
29 if (ret != sizeof(sbuild_id))
30 return ret < 0 ? ret : -EINVAL;
31
32 return fprintf(fp, "%s\n", sbuild_id);
33 }
34
35 static int filename__fprintf_build_id(const char *name, FILE *fp)
36 {
37 char sbuild_id[SBUILD_ID_SIZE];
38 int ret;
39
40 ret = filename__sprintf_build_id(name, sbuild_id);
41 if (ret != sizeof(sbuild_id))
42 return ret < 0 ? ret : -EINVAL;
43
44 return fprintf(fp, "%s\n", sbuild_id);
45 }
46
47 static bool dso__skip_buildid(struct dso *dso, int with_hits)
48 {
49 return with_hits && !dso->hit;
50 }
51
52 static int perf_session__list_build_ids(bool force, bool with_hits)
53 {
54 struct perf_session *session;
55 struct perf_data data = {
56 .path = input_name,
57 .mode = PERF_DATA_MODE_READ,
58 .force = force,
59 };
60
61 symbol__elf_init();
62 /*
63 * See if this is an ELF file first:
64 */
65 if (filename__fprintf_build_id(input_name, stdout) > 0)
66 goto out;
67
68 session = perf_session__new(&data, &build_id__mark_dso_hit_ops);
69 if (IS_ERR(session))
70 return PTR_ERR(session);
71
72 /*
73 * We take all buildids when the file contains AUX area tracing data
74 * because we do not decode the trace because it would take too long.
75 */
76 if (!perf_data__is_pipe(&data) &&
77 perf_header__has_feat(&session->header, HEADER_AUXTRACE))
78 with_hits = false;
79
80 if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID))
81 with_hits = true;
82
83 if (zstd_init(&(session->zstd_data), 0) < 0)
84 pr_warning("Decompression initialization failed. Reported data may be incomplete.\n");
85
86 /*
87 * in pipe-mode, the only way to get the buildids is to parse
88 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
89 */
90 if (with_hits || perf_data__is_pipe(&data))
91 perf_session__process_events(session);
92
93 perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
94 perf_session__delete(session);
95 out:
96 return 0;
97 }
98
99 int cmd_buildid_list(int argc, const char **argv)
100 {
101 bool show_kernel = false;
102 bool with_hits = false;
103 bool force = false;
104 const struct option options[] = {
105 OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
106 OPT_STRING('i', "input", &input_name, "file", "input file name"),
107 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
108 OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
109 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
110 OPT_END()
111 };
112 const char * const buildid_list_usage[] = {
113 "perf buildid-list [<options>]",
114 NULL
115 };
116
117 argc = parse_options(argc, argv, options, buildid_list_usage, 0);
118 setup_pager();
119
120 if (show_kernel)
121 return !(sysfs__fprintf_build_id(stdout) > 0);
122
123 return perf_session__list_build_ids(force, with_hits);
124 }
125
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