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https://github.com/luau-lang/luau.git
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404 lines
13 KiB
Python
404 lines
13 KiB
Python
# This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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import lldb
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# HACK: LLDB's python API doesn't afford anything helpful for getting at variadic template parameters.
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# We're forced to resort to parsing names as strings.
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def templateParams(s):
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depth = 0
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start = s.find("<") + 1
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result = []
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for i, c in enumerate(s[start:], start):
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if c == "<":
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depth += 1
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elif c == ">":
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if depth == 0:
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result.append(s[start:i].strip())
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break
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depth -= 1
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elif c == "," and depth == 0:
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result.append(s[start:i].strip())
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start = i + 1
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return result
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def getType(target, typeName):
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stars = 0
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typeName = typeName.strip()
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while typeName.endswith("*"):
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stars += 1
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typeName = typeName[:-1]
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if typeName.startswith("const "):
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typeName = typeName[6:]
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ty = target.FindFirstType(typeName.strip())
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for _ in range(stars):
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ty = ty.GetPointerType()
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return ty
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def luau_variant_summary(valobj, internal_dict, options):
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return valobj.GetChildMemberWithName("type").GetSummary()[1:-1]
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class LuauVariantSyntheticChildrenProvider:
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node_names = ["type", "value"]
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def __init__(self, valobj, internal_dict):
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self.valobj = valobj
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self.type_index = None
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self.current_type = None
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self.type_params = []
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self.stored_value = None
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def num_children(self):
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return len(self.node_names)
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def has_children(self):
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return True
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def get_child_index(self, name):
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try:
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return self.node_names.index(name)
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except ValueError:
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return -1
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def get_child_at_index(self, index):
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try:
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node = self.node_names[index]
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except IndexError:
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return None
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if node == "type":
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if self.current_type:
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return self.valobj.CreateValueFromExpression(
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node, f'(const char*)"{self.current_type.GetDisplayTypeName()}"'
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)
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else:
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return self.valobj.CreateValueFromExpression(
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node, '(const char*)"<unknown type>"'
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)
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elif node == "value":
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if self.stored_value is not None:
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if self.current_type is not None:
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return self.valobj.CreateValueFromData(
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node, self.stored_value.GetData(), self.current_type
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)
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else:
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return self.valobj.CreateValueExpression(
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node, '(const char*)"<unknown type>"'
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)
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else:
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return self.valobj.CreateValueFromExpression(
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node, '(const char*)"<no stored value>"'
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)
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else:
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return None
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def update(self):
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self.type_index = self.valobj.GetChildMemberWithName(
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"typeId"
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).GetValueAsSigned()
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self.type_params = templateParams(
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self.valobj.GetType().GetCanonicalType().GetName()
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)
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if len(self.type_params) > self.type_index:
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self.current_type = getType(
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self.valobj.GetTarget(), self.type_params[self.type_index]
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)
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if self.current_type:
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storage = self.valobj.GetChildMemberWithName("storage")
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self.stored_value = storage.Cast(self.current_type)
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else:
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self.stored_value = None
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else:
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self.current_type = None
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self.stored_value = None
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return False
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class DenseHashTableSyntheticChildrenProvider:
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def __init__(self, valobj, internal_dict):
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"""this call should initialize the Python object using valobj as the variable to provide synthetic children for"""
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self.valobj = valobj
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self.update()
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def num_children(self):
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"""this call should return the number of children that you want your object to have"""
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return self.capacity
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def get_child_index(self, name):
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"""this call should return the index of the synthetic child whose name is given as argument"""
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try:
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if name.startswith("[") and name.endswith("]"):
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return int(name[1:-1])
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else:
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return -1
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except Exception as e:
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print("get_child_index exception", e)
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return -1
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def get_child_at_index(self, index):
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"""this call should return a new LLDB SBValue object representing the child at the index given as argument"""
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try:
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dataMember = self.valobj.GetChildMemberWithName("data")
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data = dataMember.GetPointeeData(index)
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return self.valobj.CreateValueFromData(
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f"[{index}]",
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data,
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dataMember.Dereference().GetType(),
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)
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except Exception as e:
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print("get_child_at_index error", e)
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def update(self):
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"""this call should be used to update the internal state of this Python object whenever the state of the variables in LLDB changes.[1]
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Also, this method is invoked before any other method in the interface."""
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self.capacity = self.valobj.GetChildMemberWithName(
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"capacity"
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).GetValueAsUnsigned()
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def has_children(self):
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"""this call should return True if this object might have children, and False if this object can be guaranteed not to have children.[2]"""
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return True
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class DenseHashMapSyntheticChildrenProvider:
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fixed_names = ["count", "capacity"]
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max_expand_children = 100
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max_expand_capacity = 1000
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def __init__(self, valobj, internal_dict):
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self.valobj = valobj
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self.count = 0
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self.capacity = 0
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def num_children(self):
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return min(self.max_expand_children, self.count) + len(self.fixed_names)
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def get_child_index(self, name):
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try:
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if name in self.fixed_names:
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return self.fixed_names.index(name)
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return -1
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except Exception as e:
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print("get_child_index exception", e, name)
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return -1
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def get_child_at_index(self, index):
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try:
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if index < len(self.fixed_names):
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fixed_name = self.fixed_names[index]
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impl_child = self.valobj.GetValueForExpressionPath(
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f".impl.{fixed_name}")
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return self.valobj.CreateValueFromData(fixed_name, impl_child.GetData(), impl_child.GetType())
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else:
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index -= len(self.fixed_names)
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empty_key_valobj = self.valobj.GetValueForExpressionPath(
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f".impl.empty_key")
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key_type = empty_key_valobj.GetType().GetCanonicalType().GetName()
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skipped = 0
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for slot in range(0, min(self.max_expand_capacity, self.capacity)):
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slot_pair = self.valobj.GetValueForExpressionPath(
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f".impl.data[{slot}]")
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slot_key_valobj = slot_pair.GetChildMemberWithName("first")
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eq_test_valobj = self.valobj.EvaluateExpression(
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f"*(reinterpret_cast<const {key_type}*>({empty_key_valobj.AddressOf().GetValueAsUnsigned()})) == *(reinterpret_cast<const {key_type}*>({slot_key_valobj.AddressOf().GetValueAsUnsigned()}))")
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if eq_test_valobj.GetValue() == "true":
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continue
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# Skip over previous occupied slots.
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if index > skipped:
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skipped += 1
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continue
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slot_key = slot_key_valobj.GetSummary()
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if slot_key is None:
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slot_key = slot_key_valobj.GetValue()
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if slot_key is None:
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slot_key = slot_key_valobj.GetValueAsSigned()
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if slot_key is None:
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slot_key = slot_key_valobj.GetValueAsUnsigned()
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if slot_key is None:
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slot_key = str(index)
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slot_value_valobj = slot_pair.GetChildMemberWithName("second")
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return self.valobj.CreateValueFromData(f"[{slot_key}]", slot_value_valobj.GetData(), slot_value_valobj.GetType())
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except Exception as e:
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print("get_child_at_index error", e, index)
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def update(self):
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try:
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self.capacity = self.count = self.valobj.GetValueForExpressionPath(
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".impl.capacity").GetValueAsUnsigned()
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self.count = self.valobj.GetValueForExpressionPath(
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".impl.count").GetValueAsUnsigned()
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except Exception as e:
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print("update error", e)
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def has_children(self):
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return True
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class DenseHashSetSyntheticChildrenProvider:
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fixed_names = ["count", "capacity"]
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max_expand_children = 100
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max_expand_capacity = 1000
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def __init__(self, valobj, internal_dict):
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self.valobj = valobj
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self.count = 0
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self.capacity = 0
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def num_children(self):
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return min(self.max_expand_children, self.count) + len(self.fixed_names)
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def get_child_index(self, name):
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try:
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if name in self.fixed_names:
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return self.fixed_names.index(name)
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return -1
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except Exception as e:
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print("get_child_index exception", e, name)
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return -1
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def get_child_at_index(self, index):
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try:
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if index < len(self.fixed_names):
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fixed_name = self.fixed_names[index]
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impl_child = self.valobj.GetValueForExpressionPath(
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f".impl.{fixed_name}")
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return self.valobj.CreateValueFromData(fixed_name, impl_child.GetData(), impl_child.GetType())
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else:
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index -= len(self.fixed_names)
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empty_key_valobj = self.valobj.GetValueForExpressionPath(
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f".impl.empty_key")
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key_type = empty_key_valobj.GetType().GetCanonicalType().GetName()
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skipped = 0
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for slot in range(0, min(self.max_expand_capacity, self.capacity)):
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slot_valobj = self.valobj.GetValueForExpressionPath(
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f".impl.data[{slot}]")
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eq_test_valobj = self.valobj.EvaluateExpression(
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f"*(reinterpret_cast<const {key_type}*>({empty_key_valobj.AddressOf().GetValueAsUnsigned()})) == *(reinterpret_cast<const {key_type}*>({slot_valobj.AddressOf().GetValueAsUnsigned()}))")
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if eq_test_valobj.GetValue() == "true":
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continue
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# Skip over previous occupied slots.
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if index > skipped:
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skipped += 1
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continue
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return self.valobj.CreateValueFromData(f"[{index}]", slot_valobj.GetData(), slot_valobj.GetType())
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except Exception as e:
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print("get_child_at_index error", e, index)
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def update(self):
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try:
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self.capacity = self.count = self.valobj.GetValueForExpressionPath(
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".impl.capacity").GetValueAsUnsigned()
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self.count = self.valobj.GetValueForExpressionPath(
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".impl.count").GetValueAsUnsigned()
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except Exception as e:
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print("update error", e)
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def has_children(self):
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return True
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def luau_symbol_summary(valobj, internal_dict, options):
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local = valobj.GetChildMemberWithName("local")
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global_ = valobj.GetChildMemberWithName(
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"global").GetChildMemberWithName("value")
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if local.GetValueAsUnsigned() != 0:
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return f'local {local.GetChildMemberWithName("name").GetChildMemberWithName("value").GetSummary()}'
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elif global_.GetValueAsUnsigned() != 0:
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return f"global {global_.GetSummary()}"
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else:
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return "???"
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class AstArraySyntheticChildrenProvider:
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def __init__(self, valobj, internal_dict):
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self.valobj = valobj
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def num_children(self):
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return self.size
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def get_child_index(self, name):
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try:
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if name.startswith("[") and name.endswith("]"):
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return int(name[1:-1])
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else:
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return -1
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except Exception as e:
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print("get_child_index error:", e)
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def get_child_at_index(self, index):
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try:
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dataMember = self.valobj.GetChildMemberWithName("data")
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data = dataMember.GetPointeeData(index)
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return self.valobj.CreateValueFromData(
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f"[{index}]", data, dataMember.Dereference().GetType()
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)
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except Exception as e:
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print("get_child_index error:", e)
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def update(self):
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self.size = self.valobj.GetChildMemberWithName(
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"size").GetValueAsUnsigned()
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def has_children(self):
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return True
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def luau_typepath_property_summary(valobj, internal_dict, options):
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name = valobj.GetChildMemberWithName("name").GetSummary()
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result = "["
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read_write = False
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try:
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fflag_valobj = valobj.GetFrame().GetValueForVariablePath(
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"FFlag::DebugLuauReadWriteProperties::value")
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read_write = fflag_valobj.GetValue() == "true"
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except Exception as e:
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print("luau_typepath_property_summary error:", e)
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if read_write:
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is_read = valobj.GetChildMemberWithName("isRead").GetValue() == "true"
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if is_read:
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result += "read "
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else:
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result += "write "
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result += name
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result += "]"
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return result
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