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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/cache.h"
14#include "util/debug.h"
15#include "util/parse-options.h"
16#include "util/session.h"
17#include "util/symbol.h"
18
19#include <libelf.h>
20
21static const char *input_name;
22static bool force;
23static bool show_kernel;
24static bool with_hits;
25
26static const char * const buildid_list_usage[] = {
27 "perf buildid-list [<options>]",
28 NULL
29};
30
31static const struct option options[] = {
32 OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
33 OPT_STRING('i', "input", &input_name, "file",
34 "input file name"),
35 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
36 OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
37 OPT_INCR('v', "verbose", &verbose,
38 "be more verbose"),
39 OPT_END()
40};
41
42static int sysfs__fprintf_build_id(FILE *fp)
43{
44 u8 kallsyms_build_id[BUILD_ID_SIZE];
45 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
46
47 if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
48 sizeof(kallsyms_build_id)) != 0)
49 return -1;
50
51 build_id__sprintf(kallsyms_build_id, sizeof(kallsyms_build_id),
52 sbuild_id);
53 fprintf(fp, "%s\n", sbuild_id);
54 return 0;
55}
56
57static int filename__fprintf_build_id(const char *name, FILE *fp)
58{
59 u8 build_id[BUILD_ID_SIZE];
60 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
61
62 if (filename__read_build_id(name, build_id,
63 sizeof(build_id)) != sizeof(build_id))
64 return 0;
65
66 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
67 return fprintf(fp, "%s\n", sbuild_id);
68}
69
70static int perf_session__list_build_ids(void)
71{
72 struct perf_session *session;
73
74 elf_version(EV_CURRENT);
75
76 session = perf_session__new(input_name, O_RDONLY, force, false,
77 &build_id__mark_dso_hit_ops);
78 if (session == NULL)
79 return -1;
80
81 /*
82 * See if this is an ELF file first:
83 */
84 if (filename__fprintf_build_id(session->filename, stdout))
85 goto out;
86
87 /*
88 * in pipe-mode, the only way to get the buildids is to parse
89 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
90 */
91 if (with_hits || session->fd_pipe)
92 perf_session__process_events(session, &build_id__mark_dso_hit_ops);
93
94 perf_session__fprintf_dsos_buildid(session, stdout, with_hits);
95out:
96 perf_session__delete(session);
97 return 0;
98}
99
100static int __cmd_buildid_list(void)
101{
102 if (show_kernel)
103 return sysfs__fprintf_build_id(stdout);
104
105 return perf_session__list_build_ids();
106}
107
108int cmd_buildid_list(int argc, const char **argv, const char *prefix __used)
109{
110 argc = parse_options(argc, argv, options, buildid_list_usage, 0);
111 setup_pager();
112 return __cmd_buildid_list();
113}
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
23static 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
35static 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
47static bool dso__skip_buildid(struct dso *dso, int with_hits)
48{
49 return with_hits && !dso->hit;
50}
51
52static 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, false, &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);
95out:
96 return 0;
97}
98
99int 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}