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 #include <errno.h>
20 
21 static int sysfs__fprintf_build_id(FILE *fp)
22 {
23 	char sbuild_id[SBUILD_ID_SIZE];
24 	int ret;
25 
26 	ret = sysfs__sprintf_build_id("/", sbuild_id);
27 	if (ret != sizeof(sbuild_id))
28 		return ret < 0 ? ret : -EINVAL;
29 
30 	return fprintf(fp, "%s\n", sbuild_id);
31 }
32 
33 static int filename__fprintf_build_id(const char *name, FILE *fp)
34 {
35 	char sbuild_id[SBUILD_ID_SIZE];
36 	int ret;
37 
38 	ret = filename__sprintf_build_id(name, sbuild_id);
39 	if (ret != sizeof(sbuild_id))
40 		return ret < 0 ? ret : -EINVAL;
41 
42 	return fprintf(fp, "%s\n", sbuild_id);
43 }
44 
45 static bool dso__skip_buildid(struct dso *dso, int with_hits)
46 {
47 	return with_hits && !dso->hit;
48 }
49 
50 static int perf_session__list_build_ids(bool force, bool with_hits)
51 {
52 	struct perf_session *session;
53 	struct perf_data_file file = {
54 		.path  = input_name,
55 		.mode  = PERF_DATA_MODE_READ,
56 		.force = force,
57 	};
58 
59 	symbol__elf_init();
60 	/*
61 	 * See if this is an ELF file first:
62 	 */
63 	if (filename__fprintf_build_id(input_name, stdout) > 0)
64 		goto out;
65 
66 	session = perf_session__new(&file, false, &build_id__mark_dso_hit_ops);
67 	if (session == NULL)
68 		return -1;
69 
70 	/*
71 	 * We take all buildids when the file contains AUX area tracing data
72 	 * because we do not decode the trace because it would take too long.
73 	 */
74 	if (!perf_data_file__is_pipe(&file) &&
75 	    perf_header__has_feat(&session->header, HEADER_AUXTRACE))
76 		with_hits = false;
77 
78 	/*
79 	 * in pipe-mode, the only way to get the buildids is to parse
80 	 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
81 	 */
82 	if (with_hits || perf_data_file__is_pipe(&file))
83 		perf_session__process_events(session);
84 
85 	perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
86 	perf_session__delete(session);
87 out:
88 	return 0;
89 }
90 
91 int cmd_buildid_list(int argc, const char **argv)
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