Function parse_pmdinfo

dpdk/usertools/dpdk-pmdinfo.py:109–140

Extract DPDK PMD info JSON strings from an ELF file. :returns: A list of DPDK drivers info dictionaries.

(paths: Iterable[Path], search_plugins: bool)

# ----------------------------------------------------------------------------
def parse_pmdinfo(paths: Iterable[Path], search_plugins: bool) -> List[dict]:
    """
    Extract DPDK PMD info JSON strings from an ELF file.

    :returns:
        A list of DPDK drivers info dictionaries.
    """
    binaries = set(paths)
    for p in paths:
        binaries.update(get_needed_libs(p))
    if search_plugins:
        # cast to list to avoid errors with update while iterating
        binaries.update(list(get_plugin_libs(binaries)))

    drivers = []

    for b in binaries:
        logging.debug("analyzing %s", b)
        try:
            for s in get_elf_strings(b, ".rodata", "PMD_INFO_STRING="):
                try:
                    info = json.loads(s)
                    scrub_pci_ids(info)
                    drivers.append(info)
                except ValueError as e:
                    # invalid JSON, should never happen
                    logging.warning("%s: %s", b, e)
        except ELFError as e:
            # only happens for discovered plugins that are not ELF
            logging.debug("%s: cannot parse ELF: %s", b, e)

    return drivers


# ----------------------------------------------------------------------------