tools/perf/builtin-buildid-list.c

0001 /*
0002  * builtin-buildid-list.c
0003  *
0004  * Builtin buildid-list command: list buildids in perf.data, in the running
0005  * kernel and in ELF files.
0006  *
0007  * Copyright (C) 2009, Red Hat Inc.
0008  * Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>
0009  */
0010 #include "builtin.h"
0011 #include "perf.h"
0012 #include "util/build-id.h"
0013 #include "util/debug.h"
0014 #include "util/dso.h"
0015 #include "util/map.h"
0016 #include <subcmd/pager.h>
0017 #include <subcmd/parse-options.h>
0018 #include "util/session.h"
0019 #include "util/symbol.h"
0020 #include "util/data.h"
0021 #include <errno.h>
0022 #include <inttypes.h>
0023 #include <linux/err.h>
0024
0025 static int buildid__map_cb(struct map *map, void *arg __maybe_unused)
0026 {
0027     const struct dso *dso = map->dso;
0028     char bid_buf[SBUILD_ID_SIZE];
0029
0030     memset(bid_buf, 0, sizeof(bid_buf));
0031     if (dso->has_build_id)
0032         build_id__sprintf(&dso->bid, bid_buf);
0033     printf("%s %16" PRIx64 " %16" PRIx64, bid_buf, map->start, map->end);
0034     if (dso->long_name != NULL) {
0035         printf(" %s", dso->long_name);
0036     } else if (dso->short_name != NULL) {
0037         printf(" %s", dso->short_name);
0038     }
0039     printf("\n");
0040
0041     return 0;
0042 }
0043
0044 static void buildid__show_kernel_maps(void)
0045 {
0046     struct machine *machine;
0047
0048     machine = machine__new_host();
0049     machine__for_each_kernel_map(machine, buildid__map_cb, NULL);
0050     machine__delete(machine);
0051 }
0052
0053 static int sysfs__fprintf_build_id(FILE *fp)
0054 {
0055     char sbuild_id[SBUILD_ID_SIZE];
0056     int ret;
0057
0058     ret = sysfs__sprintf_build_id("/", sbuild_id);
0059     if (ret != sizeof(sbuild_id))
0060         return ret < 0 ? ret : -EINVAL;
0061
0062     return fprintf(fp, "%s\n", sbuild_id);
0063 }
0064
0065 static int filename__fprintf_build_id(const char *name, FILE *fp)
0066 {
0067     char sbuild_id[SBUILD_ID_SIZE];
0068     int ret;
0069
0070     ret = filename__sprintf_build_id(name, sbuild_id);
0071     if (ret != sizeof(sbuild_id))
0072         return ret < 0 ? ret : -EINVAL;
0073
0074     return fprintf(fp, "%s\n", sbuild_id);
0075 }
0076
0077 static bool dso__skip_buildid(struct dso *dso, int with_hits)
0078 {
0079     return with_hits && !dso->hit;
0080 }
0081
0082 static int perf_session__list_build_ids(bool force, bool with_hits)
0083 {
0084     struct perf_session *session;
0085     struct perf_data data = {
0086         .path  = input_name,
0087         .mode  = PERF_DATA_MODE_READ,
0088         .force = force,
0089     };
0090
0091     symbol__elf_init();
0092     /*
0093      * See if this is an ELF file first:
0094      */
0095     if (filename__fprintf_build_id(input_name, stdout) > 0)
0096         goto out;
0097
0098     session = perf_session__new(&data, &build_id__mark_dso_hit_ops);
0099     if (IS_ERR(session))
0100         return PTR_ERR(session);
0101
0102     /*
0103      * We take all buildids when the file contains AUX area tracing data
0104      * because we do not decode the trace because it would take too long.
0105      */
0106     if (!perf_data__is_pipe(&data) &&
0107         perf_header__has_feat(&session->header, HEADER_AUXTRACE))
0108         with_hits = false;
0109
0110     if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID))
0111         with_hits = true;
0112
0113     if (zstd_init(&(session->zstd_data), 0) < 0)
0114         pr_warning("Decompression initialization failed. Reported data may be incomplete.\n");
0115
0116     /*
0117      * in pipe-mode, the only way to get the buildids is to parse
0118      * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
0119      */
0120     if (with_hits || perf_data__is_pipe(&data))
0121         perf_session__process_events(session);
0122
0123     perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
0124     perf_session__delete(session);
0125 out:
0126     return 0;
0127 }
0128
0129 int cmd_buildid_list(int argc, const char **argv)
0130 {
0131     bool show_kernel = false;
0132     bool show_kernel_maps = false;
0133     bool with_hits = false;
0134     bool force = false;
0135     const struct option options[] = {
0136     OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
0137     OPT_STRING('i', "input", &input_name, "file", "input file name"),
0138     OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
0139     OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
0140     OPT_BOOLEAN('m', "kernel-maps", &show_kernel_maps,
0141         "Show build id of current kernel + modules"),
0142     OPT_INCR('v', "verbose", &verbose, "be more verbose"),
0143     OPT_END()
0144     };
0145     const char * const buildid_list_usage[] = {
0146         "perf buildid-list [<options>]",
0147         NULL
0148     };
0149
0150     argc = parse_options(argc, argv, options, buildid_list_usage, 0);
0151     setup_pager();
0152
0153     if (show_kernel) {
0154         return !(sysfs__fprintf_build_id(stdout) > 0);
0155     } else if (show_kernel_maps) {
0156         buildid__show_kernel_maps();
0157         return 0;
0158     }
0159
0160     return perf_session__list_build_ids(force, with_hits);
0161 }