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/*
* builtin-buildid-list.c
*
* Builtin buildid-list command: list buildids in perf.data, in the running
* kernel and in ELF files.
*
* Copyright (C) 2009, Red Hat Inc.
* Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>
*/
#include "builtin.h"
#include "perf.h"
#include "util/build-id.h"
#include "util/debug.h"
#include "util/dso.h"
#include "util/map.h"
#include <subcmd/pager.h>
#include <subcmd/parse-options.h>
#include "util/session.h"
#include "util/symbol.h"
#include "util/data.h"
#include <errno.h>
#include <inttypes.h>
#include <linux/err.h>
static int buildid__map_cb(struct map *map, void *arg __maybe_unused)
{
const struct dso *dso = map->dso;
char bid_buf[SBUILD_ID_SIZE];
memset(bid_buf, 0, sizeof(bid_buf));
if (dso->has_build_id)
build_id__sprintf(&dso->bid, bid_buf);
printf("%s %16" PRIx64 " %16" PRIx64, bid_buf, map->start, map->end);
if (dso->long_name != NULL) {
printf(" %s", dso->long_name);
} else if (dso->short_name != NULL) {
printf(" %s", dso->short_name);
}
printf("\n");
return 0;
}
static void buildid__show_kernel_maps(void)
{
struct machine *machine;
machine = machine__new_host();
machine__for_each_kernel_map(machine, buildid__map_cb, NULL);
machine__delete(machine);
}
static int sysfs__fprintf_build_id(FILE *fp)
{
char sbuild_id[SBUILD_ID_SIZE];
int ret;
ret = sysfs__sprintf_build_id("/", sbuild_id);
if (ret != sizeof(sbuild_id))
return ret < 0 ? ret : -EINVAL;
return fprintf(fp, "%s\n", sbuild_id);
}
static int filename__fprintf_build_id(const char *name, FILE *fp)
{
char sbuild_id[SBUILD_ID_SIZE];
int ret;
ret = filename__sprintf_build_id(name, sbuild_id);
if (ret != sizeof(sbuild_id))
return ret < 0 ? ret : -EINVAL;
return fprintf(fp, "%s\n", sbuild_id);
}
static bool dso__skip_buildid(struct dso *dso, int with_hits)
{
return with_hits && !dso->hit;
}
static int perf_session__list_build_ids(bool force, bool with_hits)
{
struct perf_session *session;
struct perf_data data = {
.path = input_name,
.mode = PERF_DATA_MODE_READ,
.force = force,
};
symbol__elf_init();
/*
* See if this is an ELF file first:
*/
if (filename__fprintf_build_id(input_name, stdout) > 0)
goto out;
session = perf_session__new(&data, &build_id__mark_dso_hit_ops);
if (IS_ERR(session))
return PTR_ERR(session);
/*
* We take all buildids when the file contains AUX area tracing data
* because we do not decode the trace because it would take too long.
*/
if (!perf_data__is_pipe(&data) &&
perf_header__has_feat(&session->header, HEADER_AUXTRACE))
with_hits = false;
if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID))
with_hits = true;
if (zstd_init(&(session->zstd_data), 0) < 0)
pr_warning("Decompression initialization failed. Reported data may be incomplete.\n");
/*
* in pipe-mode, the only way to get the buildids is to parse
* the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
*/
if (with_hits || perf_data__is_pipe(&data))
perf_session__process_events(session);
perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
perf_session__delete(session);
out:
return 0;
}
int cmd_buildid_list(int argc, const char **argv)
{
bool show_kernel = false;
bool show_kernel_maps = false;
bool with_hits = false;
bool force = false;
const struct option options[] = {
OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
OPT_STRING('i', "input", &input_name, "file", "input file name"),
OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
OPT_BOOLEAN('m', "kernel-maps", &show_kernel_maps,
"Show build id of current kernel + modules"),
OPT_INCR('v', "verbose", &verbose, "be more verbose"),
OPT_END()
};
const char * const buildid_list_usage[] = {
"perf buildid-list [<options>]",
NULL
};
argc = parse_options(argc, argv, options, buildid_list_usage, 0);
setup_pager();
if (show_kernel) {
return !(sysfs__fprintf_build_id(stdout) > 0);
} else if (show_kernel_maps) {
buildid__show_kernel_maps();
return 0;
}
return perf_session__list_build_ids(force, with_hits);
}
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