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 
23 static 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 
35 static 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 
47 static bool dso__skip_buildid(struct dso *dso, int with_hits)
48 {
49 	return with_hits && !dso->hit;
50 }
51 
52 static 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, &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 	if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID))
81 		with_hits = true;
82 
83 	if (zstd_init(&(session->zstd_data), 0) < 0)
84 		pr_warning("Decompression initialization failed. Reported data may be incomplete.\n");
85 
86 	/*
87 	 * in pipe-mode, the only way to get the buildids is to parse
88 	 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
89 	 */
90 	if (with_hits || perf_data__is_pipe(&data))
91 		perf_session__process_events(session);
92 
93 	perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
94 	perf_session__delete(session);
95 out:
96 	return 0;
97 }
98 
99 int cmd_buildid_list(int argc, const char **argv)
100 {
101 	bool show_kernel = false;
102 	bool with_hits = false;
103 	bool force = false;
104 	const struct option options[] = {
105 	OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
106 	OPT_STRING('i', "input", &input_name, "file", "input file name"),
107 	OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
108 	OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
109 	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
110 	OPT_END()
111 	};
112 	const char * const buildid_list_usage[] = {
113 		"perf buildid-list [<options>]",
114 		NULL
115 	};
116 
117 	argc = parse_options(argc, argv, options, buildid_list_usage, 0);
118 	setup_pager();
119 
120 	if (show_kernel)
121 		return !(sysfs__fprintf_build_id(stdout) > 0);
122 
123 	return perf_session__list_build_ids(force, with_hits);
124 }
125