class Test(object):
class nested(object):
ulong_valid = False
@classmethod
def check_ulong(cls, gdbtype):
cls.ulong_valid = True
type_cbs = TypeCallbacks([('unsigned long', nested.check_ulong)])
def xfs_for_each_ail_log_item_typed(mp: gdb.Value) -> Iterable[gdb.Value]:
"""
Iterates over the XFS Active Item Log and returns each item, resolved
to the specific type.
Args:
mp: The XFS mount to iterate. The value must be of
type ``struct xfs_mount``.
Yields:
:obj:`gdb.Value`:
Depending on type, the value will be any of the following types:
- ``struct xfs_buf_log_item_type``
- ``struct xfs_inode_log_item_type``
- ``struct xfs_efi_log_item_type``
- ``struct xfs_efd_log_item_type``
- ``struct xfs_dq_logitem``
- ``int`` (for UNLINK item)
Raises:
:obj:`gdb.NotAvailableError`: The target value was not available.
"""
for item in types.xfs_for_each_ail_log_item(mp):
yield types.xfs_log_item_typed(item)
type_cbs = TypeCallbacks([('struct xfs_ail', XFS.detect_ail_version)])
def kmem_cache_from_name(name: str) -> KmemCache:
try:
return kmem_caches[name]
except KeyError:
raise KmemCacheNotFound(f"No kmem cache found for {name}.")
def kmem_cache_get_all() -> ValuesView[KmemCache]:
return kmem_caches.values()
def slab_from_obj_addr(addr: int) -> Union[Slab, None]:
page = page_from_addr(addr).compound_head()
if not page.is_slab():
return None
return Slab.from_page(page)
type_cbs = TypeCallbacks([
('struct page', Slab.check_page_type),
('struct slab', Slab.check_slab_type),
('kmem_bufctl_t', Slab.check_bufctl_type),
('freelist_idx_t', Slab.check_bufctl_type),
('struct kmem_cache', KmemCache.check_kmem_cache_type),
('struct alien_cache', KmemCache.setup_alien_cache_type)
])
symbol_cbs = SymbolCallbacks([('slab_caches', setup_slab_caches),
('cache_chain', setup_slab_caches)])
def __compound_head_uses_low_bit(self) -> int:
return int(self.gdb_obj['compound_head']) - 1
def __compound_head(self) -> int:
return self._compound_head()
def compound_head(self) -> 'Page':
if not self.is_tail():
return self
return self.__class__.from_page_addr(self.__compound_head())
type_cbs = TypeCallbacks([('struct page', Page.setup_page_type),
('enum pageflags', Page.setup_pageflags),
('enum zone_type', Page.setup_zone_type),
('struct mem_section', Page.setup_mem_section)])
msymbol_cbs = MinimalSymbolCallbacks([('kernel_config_data',
Page.setup_nodes_width)])
# TODO: this should better be generalized to some callback for
# "config is available" without refering to the symbol name here
symbol_cbs = SymbolCallbacks([('vmemmap_base', Page.setup_vmemmap_base),
('page_offset_base', Page.setup_directmap_base)])
def pfn_to_page(pfn: int) -> 'Page':
return Page(Page.pfn_to_page(pfn), pfn)
def page_from_addr(addr: int) -> 'Page':
try:
mnt = mnt['mnt'].address
except gdb.error:
pass
name = ""
# Gone are the days where finding the root was as simple as
# dentry == dentry->d_parent
while dentry != root['dentry'] or mnt != root['mnt']:
# pylint: disable=consider-using-in
if dentry == mnt['mnt_root'] or dentry == dentry['d_parent']:
if mount != mount['mnt_parent']:
dentry = mount['mnt_mountpoint']
mount = mount['mnt_parent']
try:
mnt = mount['mnt'].address
except gdb.error:
mnt = mount
continue
break
name = "/" + dentry['d_name']['name'].string() + name
dentry = dentry['d_parent']
if not name:
name = '/'
return name
type_cbs = TypeCallbacks([('struct vfsmount', _check_mount_type)])
symbols_cbs = SymbolCallbacks([('init_task', Mount.check_task_interface)])
for field in enum_type.fields():
if field.enumval < nr_items:
names[field.enumval] = field.name
return (nr_items, names)
@classmethod
def get_stat_names(cls) -> List[str]:
return cls.vm_stat_names
@classmethod
def get_event_names(cls) -> List[str]:
return cls.vm_event_names
@classmethod
def get_events(cls) -> List[int]:
nr = cls.nr_event_items
events = [0] * nr
for cpu in for_each_online_cpu():
states = get_percpu_var(cls.symbols.vm_event_states, cpu)
for item in range(0, nr):
events[item] += int(states["event"][item])
return events
type_cbs = TypeCallbacks([('enum zone_stat_item', VmStat.check_enum_type),
('enum vm_event_item', VmStat.check_enum_type)])
def setup_thread_info(self, thread: gdb.InferiorThread) -> None:
task = thread.info.task_struct
thread_info = task['stack'].cast(types.thread_info_p_type)
thread.info.set_thread_info(thread_info)
@classmethod
# pylint: disable=unused-argument
def setup_inactive_task_frame_handler(cls, inactive: gdb.Type) -> None:
cls.set_fetch_registers(_FRC_inactive_task_frame)
@classmethod
# pylint: disable=unused-argument
def setup_thread_return_handler(cls, inactive: gdb.Type) -> None:
cls.set_fetch_registers(_FRC_thread_return)
@classmethod
def get_stack_pointer(cls, thread_struct: gdb.Value) -> int:
return int(thread_struct['sp'])
type_cbs = TypeCallbacks([
('struct inactive_task_frame',
x86_64Architecture.setup_inactive_task_frame_handler)
])
msymbol_cbs = MinimalSymbolCallbacks([
('thread_return', x86_64Architecture.setup_thread_return_handler)
])
register_arch(x86_64Architecture)
Args:
inode: The ``struct inode`` for which to return the associated
block device. The value must be of type ``struct inode``.
Returns:
:obj:`gdb.Value`: The ``struct block_device`` associated with the
provided ``struct inode``. The value is of type ``struct inode``.
"""
if is_bdev_inode(inode):
return inode_to_block_device(inode)
return inode['i_sb']['s_bdev'].dereference()
# pylint: disable=unused-argument
def _check_types(result: gdb.Symbol) -> None:
try:
if symvals.part_type.type.unqualified() != types.device_type_type:
raise TypeError("part_type expected to be {} not {}".format(
symvals.device_type_type, types.part_type.type))
if symvals.disk_type.type.unqualified() != types.device_type_type:
raise TypeError("disk_type expected to be {} not {}".format(
symvals.device_type_type, types.disk_type.type))
except DelayedAttributeError:
pass
symbol_cbs = SymbolCallbacks([('disk_type', _check_types),
('part_type', _check_types)])
type_cbs = TypeCallbacks([('struct device_type', _check_types)])
gdbtype: The ``struct device`` type.
"""
if struct_has_member(gdbtype, 'knode_class'):
cls._class_is_private = False
@classmethod
def class_is_private(cls) -> bool:
"""
Returns whether the class device uses ``struct device_private``
Meant to be used only be crash.types.classdev.
"""
return cls._class_is_private
type_cbs = TypeCallbacks([('struct device',
ClassdevState.setup_iterator_type)])
def for_each_class_device(class_struct: gdb.Value,
subtype: gdb.Value = None) -> Iterable[gdb.Value]:
"""
Iterate over the list of class devices
Args:
class_struct: The class of devices to iterate
subtype: A ``struct device_type *`` to use to filter the results.
The value must be of type ``struct device_type *`` and will
be used to compare against the ``type`` field of each
``struct device``.
Yields:
:obj:`gdb.Value`: A device on the class's device list. The value is
if not name in globals():
globals()[name] = 0
# Check struct request and define functions based on its current form in this
# kernel
def _check_struct_request(request_s: gdb.Type) -> None:
global _rq_in_flight
if struct_has_member(request_s, 'rq_state'):
def _rq_in_flight(request: gdb.Value) -> bool:
return (request['rq_state'] !=
types.enum_mq_rq_state_type['MQ_RQ_IDLE'])
elif struct_has_member(request_s, 'atomic_flags'):
def _rq_in_flight(request: gdb.Value) -> bool:
return (request['atomic_flags'] & (1 << int(
types.enum_rq_atomic_flags_type['REQ_ATOM_STARTED'].enumval))
!= 0)
else:
def _rq_in_flight(request: gdb.Value) -> bool:
return request['cmd_flags'] & REQ_STARTED != 0 # type: ignore
symbol_cbs = SymbolCallbacks([('disk_type', _check_types),
('part_type', _check_types)])
type_cbs = TypeCallbacks([('struct device_type', _check_types),
('enum req_flag_bits', _export_req_flags),
('struct request', _check_struct_request)])
