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 "util/build-id.h"
12 #include "util/debug.h"
13 #include "util/dso.h"
14 #include "util/map.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 "util/util.h"
21 #include <errno.h>
22 #include <inttypes.h>
23 #include <linux/err.h>
24
buildid__map_cb(struct map * map,void * arg __maybe_unused)25 static int buildid__map_cb(struct map *map, void *arg __maybe_unused)
26 {
27 const struct dso *dso = map__dso(map);
28 char bid_buf[SBUILD_ID_SIZE];
29 const char *dso_long_name = dso__long_name(dso);
30 const char *dso_short_name = dso__short_name(dso);
31
32 memset(bid_buf, 0, sizeof(bid_buf));
33 if (dso__has_build_id(dso))
34 build_id__sprintf(dso__bid_const(dso), bid_buf);
35 printf("%s %16" PRIx64 " %16" PRIx64, bid_buf, map__start(map), map__end(map));
36 if (dso_long_name != NULL)
37 printf(" %s", dso_long_name);
38 else if (dso_short_name != NULL)
39 printf(" %s", dso_short_name);
40
41 printf("\n");
42
43 return 0;
44 }
45
buildid__show_kernel_maps(void)46 static void buildid__show_kernel_maps(void)
47 {
48 struct machine *machine;
49
50 machine = machine__new_host();
51 machine__for_each_kernel_map(machine, buildid__map_cb, NULL);
52 machine__delete(machine);
53 }
54
sysfs__fprintf_build_id(FILE * fp)55 static int sysfs__fprintf_build_id(FILE *fp)
56 {
57 char sbuild_id[SBUILD_ID_SIZE];
58 int ret;
59
60 ret = sysfs__sprintf_build_id("/", sbuild_id);
61 if (ret != sizeof(sbuild_id))
62 return ret < 0 ? ret : -EINVAL;
63
64 return fprintf(fp, "%s\n", sbuild_id);
65 }
66
filename__fprintf_build_id(const char * name,FILE * fp)67 static int filename__fprintf_build_id(const char *name, FILE *fp)
68 {
69 char sbuild_id[SBUILD_ID_SIZE];
70 int ret;
71
72 ret = filename__sprintf_build_id(name, sbuild_id);
73 if (ret != sizeof(sbuild_id))
74 return ret < 0 ? ret : -EINVAL;
75
76 return fprintf(fp, "%s\n", sbuild_id);
77 }
78
dso__skip_buildid(struct dso * dso,int with_hits)79 static bool dso__skip_buildid(struct dso *dso, int with_hits)
80 {
81 return with_hits && !dso__hit(dso);
82 }
83
perf_session__list_build_ids(bool force,bool with_hits)84 static int perf_session__list_build_ids(bool force, bool with_hits)
85 {
86 struct perf_session *session;
87 struct perf_data data = {
88 .path = input_name,
89 .mode = PERF_DATA_MODE_READ,
90 .force = force,
91 };
92 struct perf_tool build_id__mark_dso_hit_ops;
93
94 symbol__elf_init();
95 /*
96 * See if this is an ELF file first:
97 */
98 if (filename__fprintf_build_id(input_name, stdout) > 0)
99 goto out;
100
101 perf_tool__init(&build_id__mark_dso_hit_ops, /*ordered_events=*/true);
102 build_id__mark_dso_hit_ops.sample = build_id__mark_dso_hit;
103 build_id__mark_dso_hit_ops.mmap = perf_event__process_mmap;
104 build_id__mark_dso_hit_ops.mmap2 = perf_event__process_mmap2;
105 build_id__mark_dso_hit_ops.fork = perf_event__process_fork;
106 build_id__mark_dso_hit_ops.exit = perf_event__exit_del_thread;
107 build_id__mark_dso_hit_ops.attr = perf_event__process_attr;
108 build_id__mark_dso_hit_ops.build_id = perf_event__process_build_id;
109
110 session = perf_session__new(&data, &build_id__mark_dso_hit_ops);
111 if (IS_ERR(session))
112 return PTR_ERR(session);
113
114 /*
115 * We take all buildids when the file contains AUX area tracing data
116 * because we do not decode the trace because it would take too long.
117 */
118 if (!perf_data__is_pipe(&data) &&
119 perf_header__has_feat(&session->header, HEADER_AUXTRACE))
120 with_hits = false;
121
122 if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID))
123 with_hits = true;
124
125 if (zstd_init(&(session->zstd_data), 0) < 0)
126 pr_warning("Decompression initialization failed. Reported data may be incomplete.\n");
127
128 /*
129 * in pipe-mode, the only way to get the buildids is to parse
130 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
131 */
132 if (with_hits || perf_data__is_pipe(&data))
133 perf_session__process_events(session);
134
135 perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
136 perf_session__delete(session);
137 out:
138 return 0;
139 }
140
cmd_buildid_list(int argc,const char ** argv)141 int cmd_buildid_list(int argc, const char **argv)
142 {
143 bool show_kernel = false;
144 bool show_kernel_maps = false;
145 bool with_hits = false;
146 bool force = false;
147 const struct option options[] = {
148 OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
149 OPT_STRING('i', "input", &input_name, "file", "input file name"),
150 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
151 OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
152 OPT_BOOLEAN('m', "kernel-maps", &show_kernel_maps,
153 "Show build id of current kernel + modules"),
154 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
155 OPT_END()
156 };
157 const char * const buildid_list_usage[] = {
158 "perf buildid-list [<options>]",
159 NULL
160 };
161
162 argc = parse_options(argc, argv, options, buildid_list_usage, 0);
163 setup_pager();
164
165 if (show_kernel) {
166 return !(sysfs__fprintf_build_id(stdout) > 0);
167 } else if (show_kernel_maps) {
168 buildid__show_kernel_maps();
169 return 0;
170 }
171
172 return perf_session__list_build_ids(force, with_hits);
173 }
174