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