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