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
sysfs__fprintf_build_id(FILE * fp)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
filename__fprintf_build_id(const char * name,FILE * fp)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
dso__skip_buildid(struct dso * dso,int with_hits)47 static bool dso__skip_buildid(struct dso *dso, int with_hits)
48 {
49 return with_hits && !dso->hit;
50 }
51
perf_session__list_build_ids(bool force,bool with_hits)52 static int perf_session__list_build_ids(bool force, bool with_hits)
53 {
54 struct perf_session *session;
55
56 symbol__elf_init();
57 /*
58 * See if this is an ELF file first:
59 */
60 if (filename__fprintf_build_id(input_name, stdout))
61 goto out;
62
63 session = perf_session__new(input_name, O_RDONLY, force, false,
64 &build_id__mark_dso_hit_ops);
65 if (session == NULL)
66 return -1;
67 /*
68 * in pipe-mode, the only way to get the buildids is to parse
69 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
70 */
71 if (with_hits || session->fd_pipe)
72 perf_session__process_events(session, &build_id__mark_dso_hit_ops);
73
74 perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
75 perf_session__delete(session);
76 out:
77 return 0;
78 }
79
cmd_buildid_list(int argc,const char ** argv,const char * prefix __maybe_unused)80 int cmd_buildid_list(int argc, const char **argv,
81 const char *prefix __maybe_unused)
82 {
83 bool show_kernel = false;
84 bool with_hits = false;
85 bool force = false;
86 const struct option options[] = {
87 OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
88 OPT_STRING('i', "input", &input_name, "file", "input file name"),
89 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
90 OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
91 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
92 OPT_END()
93 };
94 const char * const buildid_list_usage[] = {
95 "perf buildid-list [<options>]",
96 NULL
97 };
98
99 argc = parse_options(argc, argv, options, buildid_list_usage, 0);
100 setup_pager();
101
102 if (show_kernel)
103 return sysfs__fprintf_build_id(stdout);
104
105 return perf_session__list_build_ids(force, with_hits);
106 }
107