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