def test_get_elf_files_to_patch(self):
elf_files = elf.get_elf_files(
self.fake_elf.root_path,
{'libc.so.6', 'libssl.so.1.0.0', 'fake_elf-shared-object',
'fake_elf-2.26'})
to_patch = elf.get_elf_files_to_patch(elf_files)
self.assertThat({os.path.basename(e.path) for e in to_patch},
Equals({'fake_elf-shared-object', 'fake_elf-2.26'}))
def _patch(self, dynamic_linker: str) -> None:
preferred_patchelf_path = self._get_preferred_patchelf_path()
elf_patcher = elf.Patcher(
dynamic_linker=dynamic_linker,
root_path=self._primedir,
preferred_patchelf_path=preferred_patchelf_path)
files_to_patch = elf.get_elf_files_to_patch(self._elf_files)
for elf_file in files_to_patch:
try:
elf_patcher.patch(elf_file=elf_file)
except errors.PatcherError as patch_error:
logger.warning(
'An attempt to patch {!r} so that it would work '
'correctly in diverse environments was made and failed. '
'To disable this behavior set '
'`build-attributes: [no-patchelf]` for the part.'.format(
elf_file.path))
if not self._is_go_based_plugin:
raise patch_error
def prime(self, force=False) -> None: # noqa: C901
self.makedirs()
self.notify_part_progress('Priming')
snap_files, snap_dirs = self.migratable_fileset_for('prime')
_migrate_files(snap_files, snap_dirs, self.stagedir, self.primedir)
elf_files = elf.get_elf_files(self.primedir, snap_files)
all_dependencies = set()
# TODO: base snap support
core_path = common.get_core_path()
# Clear the cache of all libs that aren't already in the primedir
self._soname_cache.reset_except_root(self.primedir)
for elf_file in elf_files:
all_dependencies.update(
elf_file.load_dependencies(root_path=self.primedir,
core_base_path=core_path,
soname_cache=self._soname_cache))
dependency_paths = self._handle_dependencies(all_dependencies)
if not self._build_attributes.keep_execstack():
clear_execstack(elf_files=elf_files)
# TODO revisit if we need to support variations and permutations
# of this
staged_patchelf_path = os.path.join(self.stagedir, 'bin', 'patchelf')
if not os.path.exists(staged_patchelf_path):
staged_patchelf_path = None
# We need to verify now that the GLIBC version would be compatible
# with that of the base.
# TODO the linker version depends on the chosen base, but that
# base may not be installed so we cannot depend on
# get_core_dynamic_linker to resolve the final path for which
# we resort to our only working base 16, ld-2.23.so.
linker_incompat = dict() # type: Dict[str, str]
for elf_file in elf_files:
if not elf_file.is_linker_compatible(linker='ld-2.23.so'):
linker_incompat[elf_file.path] = elf_file.get_required_glibc()
# If libc6 is staged, to avoid symbol mixups we will resort to
# glibc mangling.
libc6_staged = 'libc6' in self._part_properties.get(
'stage-packages', [])
is_classic = self._confinement == 'classic'
# classic confined snaps built on anything but a host supporting the
# the target base will require glibc mangling.
classic_mangling_needed = (
is_classic
and not self._project_options.is_host_compatible_with_base)
if linker_incompat:
formatted_items = [
'- {} (requires GLIBC {})'.format(k, v)
for k, v in linker_incompat.items()
]
logger.warning(
'The GLIBC version of the targeted core is 2.23. A newer '
'libc will be required for the following files:\n{}'.format(
'\n'.join(formatted_items)))
dynamic_linker = None
if linker_incompat or libc6_staged or classic_mangling_needed:
if not libc6_staged:
raise errors.StagePackageMissingError(package='libc6')
dynamic_linker = elf.find_linker(
root_path=self.primedir, snap_base_path=self._snap_base_path)
elif is_classic:
dynamic_linker = self._project_options.get_core_dynamic_linker()
if dynamic_linker and not self._build_attributes.no_patchelf():
logger.warning(
'Files in this part are going to be patched to execute '
'correctly on diverse environments.\n'
'To disable this behavior set '
'`build-attributes: [no-patchelf]` for the part.')
elf_patcher = elf.Patcher(
dynamic_linker=dynamic_linker,
root_path=self.primedir,
preferred_patchelf_path=staged_patchelf_path)
files_to_patch = elf.get_elf_files_to_patch(elf_files)
for elf_file in files_to_patch:
elf_patcher.patch(elf_file=elf_file)
elif dynamic_linker and self._build_attributes.no_patchelf():
logger.warning(
'The following files are not going to be patched to work '
'correctly in the environment as '
'`build-attributes: [no-patchelf]` is set for the '
'part:\n{}'.format(''.join(
['- {}\n'.format(e.path) for e in elf_files])))
self.mark_prime_done(snap_files, snap_dirs, dependency_paths)