1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * builtin-buildid-list.c
4  *
5  * Builtin buildid-list command: list buildids in perf.data, in the running
6  * kernel and in ELF files.
7  *
8  * Copyright (C) 2009, Red Hat Inc.
9  * Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>
10  */
11 #include "builtin.h"
12 #include "perf.h"
13 #include "util/build-id.h"
14 #include "util/cache.h"
15 #include "util/debug.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 
22 static int sysfs__fprintf_build_id(FILE *fp)
23 {
24 	char sbuild_id[SBUILD_ID_SIZE];
25 	int ret;
26 
27 	ret = sysfs__sprintf_build_id("/", sbuild_id);
28 	if (ret != sizeof(sbuild_id))
29 		return ret < 0 ? ret : -EINVAL;
30 
31 	return fprintf(fp, "%s\n", sbuild_id);
32 }
33 
34 static int filename__fprintf_build_id(const char *name, FILE *fp)
35 {
36 	char sbuild_id[SBUILD_ID_SIZE];
37 	int ret;
38 
39 	ret = filename__sprintf_build_id(name, sbuild_id);
40 	if (ret != sizeof(sbuild_id))
41 		return ret < 0 ? ret : -EINVAL;
42 
43 	return fprintf(fp, "%s\n", sbuild_id);
44 }
45 
46 static bool dso__skip_buildid(struct dso *dso, int with_hits)
47 {
48 	return with_hits && !dso->hit;
49 }
50 
51 static int perf_session__list_build_ids(bool force, bool with_hits)
52 {
53 	struct perf_session *session;
54 	struct perf_data data = {
55 		.path  = input_name,
56 		.mode  = PERF_DATA_MODE_READ,
57 		.force = force,
58 	};
59 
60 	symbol__elf_init();
61 	/*
62 	 * See if this is an ELF file first:
63 	 */
64 	if (filename__fprintf_build_id(input_name, stdout) > 0)
65 		goto out;
66 
67 	session = perf_session__new(&data, false, &build_id__mark_dso_hit_ops);
68 	if (session == NULL)
69 		return -1;
70 
71 	/*
72 	 * We take all buildids when the file contains AUX area tracing data
73 	 * because we do not decode the trace because it would take too long.
74 	 */
75 	if (!perf_data__is_pipe(&data) &&
76 	    perf_header__has_feat(&session->header, HEADER_AUXTRACE))
77 		with_hits = false;
78 
79 	/*
80 	 * in pipe-mode, the only way to get the buildids is to parse
81 	 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
82 	 */
83 	if (with_hits || perf_data__is_pipe(&data))
84 		perf_session__process_events(session);
85 
86 	perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
87 	perf_session__delete(session);
88 out:
89 	return 0;
90 }
91 
92 int cmd_buildid_list(int argc, const char **argv)
93 {
94 	bool show_kernel = false;
95 	bool with_hits = false;
96 	bool force = false;
97 	const struct option options[] = {
98 	OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
99 	OPT_STRING('i', "input", &input_name, "file", "input file name"),
100 	OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
101 	OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
102 	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
103 	OPT_END()
104 	};
105 	const char * const buildid_list_usage[] = {
106 		"perf buildid-list [<options>]",
107 		NULL
108 	};
109 
110 	argc = parse_options(argc, argv, options, buildid_list_usage, 0);
111 	setup_pager();
112 
113 	if (show_kernel)
114 		return !(sysfs__fprintf_build_id(stdout) > 0);
115 
116 	return perf_session__list_build_ids(force, with_hits);
117 }
118