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Protect a bit against uninitialized std::list objects, but there is more 

work to be done.

llvm-svn: 136579
This commit is contained in:
Greg Clayton 2011-07-30 22:26:17 +00:00
parent 3883bca4f4
commit 3ae5a18656
1 changed files with 33 additions and 26 deletions
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59
lldb/test/functionalities/data-formatter/data-formatter-python-synth/StdListSynthProvider.py
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@ -1,61 +1,68 @@
import re
class StdListSynthProvider:
def __init__(self, valobj, dict):
self.valobj = valobj;
self.valobj = valobj
self.update()
def num_children(self):
next_val = int(self.Mnext.GetValue(),0)
prev_val = int(self.Mprev.GetValue(),0)
if next_val == 0:
return 0;
if next_val == self.Mnode_address:
return 0;
next_val = int(self.next.GetValue(),0)
prev_val = int(self.prev.GetValue(),0)
# After a std::list has been initialized, both next and prev will be non-NULL
if next_val == 0 or prev_val == 0:
return 0
if next_val == self.node_address:
return 0
if next_val == prev_val:
return 1;
return 1
size = 2
current = self.Mnext
while int(current.GetChildMemberWithName('_M_next').GetValue(),0) != self.Mnode_address:
size = size + 1;
current = self.next
while int(current.GetChildMemberWithName('_M_next').GetValue(),0) != self.node_address:
size = size + 1
current = current.GetChildMemberWithName('_M_next')
return (size - 1)
def get_child_index(self,name):
if name == "len":
return self.num_children();
return self.num_children()
else:
return int(name.lstrip('[').rstrip(']'))
def get_child_at_index(self,index):
if index == self.num_children():
return self.valobj.CreateValueFromExpression("len",str(self.num_children()))
else:
offset = index
current = self.Mnext;
current = self.next
while offset > 0:
current = current.GetChildMemberWithName('_M_next');
offset = offset - 1;
current = current.GetChildMemberWithName('_M_next')
offset = offset - 1
return current.CreateChildAtOffset('['+str(index)+']',2*current.GetType().GetByteSize(),self.data_type)
def extract_type_name(self,name):
self.type_name = name[16:]
index = 2
count_of_template = 1
while index < len(self.type_name):
if self.type_name[index] == '<':
count_of_template = count_of_template + 1;
count_of_template = count_of_template + 1
elif self.type_name[index] == '>':
count_of_template = count_of_template - 1;
count_of_template = count_of_template - 1
elif self.type_name[index] == ',' and count_of_template == 1:
self.type_name = self.type_name[:index]
break
index = index + 1;
index = index + 1
self.type_name_nospaces = self.type_name.replace(", ", ",")
def update(self):
self.Mimpl = self.valobj.GetChildMemberWithName('_M_impl')
self.Mnode = self.Mimpl.GetChildMemberWithName('_M_node')
self.extract_type_name(self.Mimpl.GetType().GetName())
self.Mnode_address = int(self.valobj.AddressOf().GetValue(), 0)
self.Mnext = self.Mnode.GetChildMemberWithName('_M_next')
self.Mprev = self.Mnode.GetChildMemberWithName('_M_prev')
self.data_type = self.Mnode.GetTarget().FindFirstType(self.type_name)
impl = self.valobj.GetChildMemberWithName('_M_impl')
node = impl.GetChildMemberWithName('_M_node')
self.extract_type_name(impl.GetType().GetName())
self.node_address = int(self.valobj.AddressOf().GetValue(), 0)
self.next = node.GetChildMemberWithName('_M_next')
self.prev = node.GetChildMemberWithName('_M_prev')
self.data_type = node.GetTarget().FindFirstType(self.type_name)
# tries to fight against a difference in formatting type names between gcc and clang
if self.data_type.IsValid() == False:
self.data_type = self.Mnode.GetTarget().FindFirstType(self.type_name_nospaces)
self.data_type = node.GetTarget().FindFirstType(self.type_name_nospaces)
self.data_size = self.data_type.GetByteSize()