lldbDataFormatters.py
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"""
LLDB Formatters for LLVM data types.
Load into LLDB with 'command script import /path/to/lldbDataFormatters.py'
"""
def __lldb_init_module(debugger, internal_dict):
debugger.HandleCommand('type category define -e llvm -l c++')
debugger.HandleCommand('type synthetic add -w llvm '
'-l lldbDataFormatters.SmallVectorSynthProvider '
'-x "^llvm::SmallVectorImpl<.+>$"')
debugger.HandleCommand('type synthetic add -w llvm '
'-l lldbDataFormatters.SmallVectorSynthProvider '
'-x "^llvm::SmallVector<.+,.+>$"')
debugger.HandleCommand('type synthetic add -w llvm '
'-l lldbDataFormatters.ArrayRefSynthProvider '
'-x "^llvm::ArrayRef<.+>$"')
debugger.HandleCommand('type summary add -w llvm '
'-F lldbDataFormatters.OptionalSummaryProvider '
'-x "^llvm::Optional<.+>$"')
debugger.HandleCommand('type summary add -w llvm '
'-F lldbDataFormatters.SmallStringSummaryProvider '
'-x "^llvm::SmallString<.+>$"')
debugger.HandleCommand('type summary add -w llvm '
'-F lldbDataFormatters.StringRefSummaryProvider '
'-x "^llvm::StringRef$"')
debugger.HandleCommand('type summary add -w llvm '
'-F lldbDataFormatters.ConstStringSummaryProvider '
'-x "^lldb_private::ConstString$"')
# Pretty printer for llvm::SmallVector/llvm::SmallVectorImpl
class SmallVectorSynthProvider:
def __init__(self, valobj, dict):
self.valobj = valobj;
self.update() # initialize this provider
def num_children(self):
return self.size.GetValueAsUnsigned(0)
def get_child_index(self, name):
try:
return int(name.lstrip('[').rstrip(']'))
except:
return -1;
def get_child_at_index(self, index):
# Do bounds checking.
if index < 0:
return None
if index >= self.num_children():
return None;
offset = index * self.type_size
return self.begin.CreateChildAtOffset('['+str(index)+']',
offset, self.data_type)
def update(self):
self.begin = self.valobj.GetChildMemberWithName('BeginX')
self.size = self.valobj.GetChildMemberWithName('Size')
the_type = self.valobj.GetType()
# If this is a reference type we have to dereference it to get to the
# template parameter.
if the_type.IsReferenceType():
the_type = the_type.GetDereferencedType()
self.data_type = the_type.GetTemplateArgumentType(0)
self.type_size = self.data_type.GetByteSize()
assert self.type_size != 0
class ArrayRefSynthProvider:
""" Provider for llvm::ArrayRef """
def __init__(self, valobj, dict):
self.valobj = valobj;
self.update() # initialize this provider
def num_children(self):
return self.length
def get_child_index(self, name):
try:
return int(name.lstrip('[').rstrip(']'))
except:
return -1;
def get_child_at_index(self, index):
if index < 0 or index >= self.num_children():
return None;
offset = index * self.type_size
return self.data.CreateChildAtOffset('[' + str(index) + ']',
offset, self.data_type)
def update(self):
self.data = self.valobj.GetChildMemberWithName('Data')
length_obj = self.valobj.GetChildMemberWithName('Length')
self.length = length_obj.GetValueAsUnsigned(0)
self.data_type = self.data.GetType().GetPointeeType()
self.type_size = self.data_type.GetByteSize()
assert self.type_size != 0
def OptionalSummaryProvider(valobj, internal_dict):
storage = valobj.GetChildMemberWithName('Storage')
if not storage:
storage = valobj
failure = 2
hasVal = storage.GetChildMemberWithName('hasVal').GetValueAsUnsigned(failure)
if hasVal == failure:
return '<could not read llvm::Optional>'
if hasVal == 0:
return 'None'
underlying_type = storage.GetType().GetTemplateArgumentType(0)
storage = storage.GetChildMemberWithName('value')
return str(storage.Cast(underlying_type))
def SmallStringSummaryProvider(valobj, internal_dict):
num_elements = valobj.GetNumChildren()
res = "\""
for i in range(0, num_elements):
c = valobj.GetChildAtIndex(i).GetValue()
if c:
res += c.strip("'")
res += "\""
return res
def StringRefSummaryProvider(valobj, internal_dict):
if valobj.GetNumChildren() == 2:
# StringRef's are also used to point at binary blobs in memory,
# so filter out suspiciously long strings.
max_length = 256
length = valobj.GetChildAtIndex(1).GetValueAsUnsigned(max_length)
if length == 0:
return "NULL"
if length < max_length:
return valobj.GetChildAtIndex(0).GetSummary()
return ""
def ConstStringSummaryProvider(valobj, internal_dict):
if valobj.GetNumChildren() == 1:
return valobj.GetChildAtIndex(0).GetSummary()
return ""