diff options
| -rw-r--r-- | utils/lldbDataFormatters.py | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/utils/lldbDataFormatters.py b/utils/lldbDataFormatters.py new file mode 100644 index 0000000000..18b407a02a --- /dev/null +++ b/utils/lldbDataFormatters.py @@ -0,0 +1,53 @@ +""" +Load into LLDB with: +script import lldbDataFormatters +type synthetic add -x "^llvm::SmallVectorImpl<.+>$" -l lldbDataFormatters.SmallVectorSynthProvider +""" + +# Pretty printer for llvm::SmallVector/llvm::SmallVectorImpl +class SmallVectorSynthProvider: + def __init__(self, valobj, dict): + self.valobj = valobj; + self.update() # initialize this provider + + def num_children(self): + begin = self.begin.GetValueAsUnsigned(0) + end = self.end.GetValueAsUnsigned(0) + return (end - begin)/self.type_size + + def get_child_index(self, name): + try: + return int(name.lstrip('[').rstrip(']')) + except: + return -1; + + def get_child_at_index(self, index): + # Do bounds checking. + if index < 0: + return None + if index >= self.num_children(): + return None; + + offset = index * self.type_size + return self.begin.CreateChildAtOffset('['+str(index)+']', + offset, self.data_type) + + def get_type_from_name(self): + import re + name = self.valobj.GetType().GetName() + # This class works with both SmallVectors and SmallVectorImpls. + res = re.match("^(llvm::)?SmallVectorImpl<(.+)>$", name) + if res: + return res.group(2) + res = re.match("^(llvm::)?SmallVector<(.+), \d+>$", name) + if res: + return res.group(2) + return None + + def update(self): + self.begin = self.valobj.GetChildMemberWithName('BeginX') + self.end = self.valobj.GetChildMemberWithName('EndX') + data_type = self.get_type_from_name() + # FIXME: this sometimes returns an invalid type. + self.data_type = self.valobj.GetTarget().FindFirstType(data_type) + self.type_size = self.data_type.GetByteSize() |