builtin-buildid-list.c

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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 <[email protected]>
 */
#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"

static int sysfs__fprintf_build_id(FILE *fp)
{
    u8 kallsyms_build_id[BUILD_ID_SIZE];
    char sbuild_id[BUILD_ID_SIZE * 2 + 1];

    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[BUILD_ID_SIZE * 2 + 1];

    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 int perf_session__list_build_ids(const char *input_name,
                    bool force, bool with_hits)
{
    struct perf_session *session;

    symbol__elf_init();

    session = perf_session__new(input_name, O_RDONLY, force, false,
                    &build_id__mark_dso_hit_ops);
    if (session == NULL)
        return -1;

    /*
     * See if this is an ELF file first:
     */
    if (filename__fprintf_build_id(session->filename, stdout))
        goto out;

    /*
     * 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 || session->fd_pipe)
        perf_session__process_events(session, &build_id__mark_dso_hit_ops);

    perf_session__fprintf_dsos_buildid(session, stdout, with_hits);
out:
    perf_session__delete(session);
    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 char *input_name = NULL;
    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(input_name, force, with_hits);
}