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 <subcmd/parse-options.h>
16 #include "util/session.h"
17 #include "util/symbol.h"
18 #include "util/data.h"
19 
20 static int sysfs__fprintf_build_id(FILE *fp)
21 {
22 	char sbuild_id[SBUILD_ID_SIZE];
23 	int ret;
24 
25 	ret = sysfs__sprintf_build_id("/", sbuild_id);
26 	if (ret != sizeof(sbuild_id))
27 		return ret < 0 ? ret : -EINVAL;
28 
29 	return fprintf(fp, "%s\n", sbuild_id);
30 }
31 
32 static int filename__fprintf_build_id(const char *name, FILE *fp)
33 {
34 	char sbuild_id[SBUILD_ID_SIZE];
35 	int ret;
36 
37 	ret = filename__sprintf_build_id(name, sbuild_id);
38 	if (ret != sizeof(sbuild_id))
39 		return ret < 0 ? ret : -EINVAL;
40 
41 	return fprintf(fp, "%s\n", sbuild_id);
42 }
43 
44 static bool dso__skip_buildid(struct dso *dso, int with_hits)
45 {
46 	return with_hits && !dso->hit;
47 }
48 
49 static int perf_session__list_build_ids(bool force, bool with_hits)
50 {
51 	struct perf_session *session;
52 	struct perf_data_file file = {
53 		.path  = input_name,
54 		.mode  = PERF_DATA_MODE_READ,
55 		.force = force,
56 	};
57 
58 	symbol__elf_init();
59 	/*
60 	 * See if this is an ELF file first:
61 	 */
62 	if (filename__fprintf_build_id(input_name, stdout) > 0)
63 		goto out;
64 
65 	session = perf_session__new(&file, false, &build_id__mark_dso_hit_ops);
66 	if (session == NULL)
67 		return -1;
68 
69 	/*
70 	 * We take all buildids when the file contains AUX area tracing data
71 	 * because we do not decode the trace because it would take too long.
72 	 */
73 	if (!perf_data_file__is_pipe(&file) &&
74 	    perf_header__has_feat(&session->header, HEADER_AUXTRACE))
75 		with_hits = false;
76 
77 	/*
78 	 * in pipe-mode, the only way to get the buildids is to parse
79 	 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
80 	 */
81 	if (with_hits || perf_data_file__is_pipe(&file))
82 		perf_session__process_events(session);
83 
84 	perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
85 	perf_session__delete(session);
86 out:
87 	return 0;
88 }
89 
90 int cmd_buildid_list(int argc, const char **argv,
91 		     const char *prefix __maybe_unused)
92 {
93 	bool show_kernel = false;
94 	bool with_hits = false;
95 	bool force = false;
96 	const struct option options[] = {
97 	OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
98 	OPT_STRING('i', "input", &input_name, "file", "input file name"),
99 	OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
100 	OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
101 	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
102 	OPT_END()
103 	};
104 	const char * const buildid_list_usage[] = {
105 		"perf buildid-list [<options>]",
106 		NULL
107 	};
108 
109 	argc = parse_options(argc, argv, options, buildid_list_usage, 0);
110 	setup_pager();
111 
112 	if (show_kernel)
113 		return !(sysfs__fprintf_build_id(stdout) > 0);
114 
115 	return perf_session__list_build_ids(force, with_hits);
116 }
117