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import gdb
def _dereference_dynamic(pointer):
target = pointer.dereference()
try:
dynamic_type = target.dynamic_type
if dynamic_type != target.type:
target = target.cast(dynamic_type)
except gdb.error:
pass
return target
class KstdUniquePtrPrinter(gdb.ValuePrinter):
def __init__(self, val):
self.__val = val
self.__type = val.type.template_argument(0)
def to_string(self):
pointer = self.__val["m_storage"]
if int(pointer) == 0:
return f"kstd::unique_ptr<{self.__type}> (empty)"
return f"kstd::unique_ptr<{self.__type}>"
def children(self):
pointer = self.__val["m_storage"]
if int(pointer) != 0:
if pointer.type.target().code == gdb.TYPE_CODE_VOID:
yield ("get()", pointer)
else:
yield ("get()", _dereference_dynamic(pointer))
def display_hint(self):
return None
class KstdSharedPtrPrinter(gdb.ValuePrinter):
def __init__(self, val):
self.__val = val
self.__type = val.type.template_argument(0)
def to_string(self):
pointer = self.__val["m_pointer"]
control_block = self.__val["m_control_block"]
if int(pointer) == 0 or int(control_block) == 0:
return f"shared_ptr<{self.__type}> (empty)"
strong_refs = int(control_block["m_strong_count"]["_M_i"])
weak_refs = int(control_block["m_weak_count"]["_M_i"])
return (
f"shared_ptr<{self.__type}> use count {strong_refs}, weak count {weak_refs}"
)
def children(self):
pointer = self.__val["m_pointer"]
control_block = self.__val["m_control_block"]
if int(pointer) != 0:
if pointer.type.target().code == gdb.TYPE_CODE_VOID:
# GDB cannot dereference a void* - there's no size/layout to interpret it with. This is the
# shared_ptr<void> case (e.g. kapi::devices::device::driver_data) - show the raw address instead
# of crashing.
yield ("get()", pointer)
else:
yield ("get()", _dereference_dynamic(pointer))
def display_hint(self):
return None
class KstdWeakPtrPrinter(gdb.ValuePrinter):
def __init__(self, val):
self.__val = val
self.__type = val.type.template_argument(0)
def to_string(self):
pointer = self.__val["m_pointer"]
control_block = self.__val["m_control_block"]
if int(pointer) == 0 or int(control_block) == 0:
return f"weak_ptr<{self.__type}> (empty)"
strong_refs = int(control_block["m_strong_count"]["_M_i"])
weak_refs = int(control_block["m_weak_count"]["_M_i"])
return (
f"weak_ptr<{self.__type}> use count {strong_refs}, weak count {weak_refs}"
)
def children(self):
pointer = self.__val["m_pointer"]
if int(pointer) != 0:
if pointer.type.target().code == gdb.TYPE_CODE_VOID:
yield ("get()", pointer)
else:
yield ("get()", _dereference_dynamic(pointer))
def display_hint(self):
return None
class KstdObserverPtrPrinter(gdb.ValuePrinter):
def __init__(self, val):
self.__val = val
self.__type = val.type.template_argument(0)
self.__pointer = val["m_ptr"]
def to_string(self):
return f"{(self.__pointer)}"
def children(self):
if int(self.__pointer) != 0:
if self.__pointer.type.target().code == gdb.TYPE_CODE_VOID:
yield ("get()", self.__pointer)
else:
yield ("get()", _dereference_dynamic(self.__pointer))
def display_hint(self):
return None
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