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	/*
81	 * in pipe-mode, the only way to get the buildids is to parse
82	 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
83	 */
84	if (with_hits || perf_data__is_pipe(&data))
85		perf_session__process_events(session);
86
87	perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
88	perf_session__delete(session);
89out:
90	return 0;
91}
92
93int cmd_buildid_list(int argc, const char **argv)
94{
95	bool show_kernel = false;
96	bool with_hits = false;
97	bool force = false;
98	const struct option options[] = {
99	OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
100	OPT_STRING('i', "input", &input_name, "file", "input file name"),
101	OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
102	OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
103	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
104	OPT_END()
105	};
106	const char * const buildid_list_usage[] = {
107		"perf buildid-list [<options>]",
108		NULL
109	};
110
111	argc = parse_options(argc, argv, options, buildid_list_usage, 0);
112	setup_pager();
113
114	if (show_kernel)
115		return !(sysfs__fprintf_build_id(stdout) > 0);
116
117	return perf_session__list_build_ids(force, with_hits);
118}
119