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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/cache.h"
#include "util/debug.h"
#include "util/parse-options.h"
#include "util/session.h"
#include "util/symbol.h"
#include "util/data.h"
static int sysfs__fprintf_build_id(FILE *fp)
{
u8 kallsyms_build_id[BUILD_ID_SIZE];
char sbuild_id[SBUILD_ID_SIZE];
if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
sizeof(kallsyms_build_id)) != 0)
return -1;
build_id__sprintf(kallsyms_build_id, sizeof(kallsyms_build_id),
sbuild_id);
fprintf(fp, "%s\n", sbuild_id);
return 0;
}
static int filename__fprintf_build_id(const char *name, FILE *fp)
{
u8 build_id[BUILD_ID_SIZE];
char sbuild_id[SBUILD_ID_SIZE];
if (filename__read_build_id(name, build_id,
sizeof(build_id)) != sizeof(build_id))
return 0;
build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
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_file file = {
.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))
goto out;
session = perf_session__new(&file, false, &build_id__mark_dso_hit_ops);
if (session == NULL)
return -1;
/*
* 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_file__is_pipe(&file) &&
perf_header__has_feat(&session->header, HEADER_AUXTRACE))
with_hits = false;
/*
* 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_file__is_pipe(&file))
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,
const char *prefix __maybe_unused)
{
bool show_kernel = 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_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);
return perf_session__list_build_ids(force, with_hits);
}
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