NativeAOT.py

"""
LLDB pretty printer for NativeAOT

Add to ~/.lldbinit:

command script import {path-to-lldb-nativeaot}/NativeAOT.py
"""

import lldb

def __lldb_init_module(debugger, dict):
    debugger.HandleCommand('type summary add -x "^String$" -e -F NativeAOT.String_SummaryProvider')
    debugger.HandleCommand('type summary add -x "^__Array<.+>$" -e -F NativeAOT.Array_SummaryProvider')
    debugger.HandleCommand('type synthetic add -x "^__Array<.+>$" -l NativeAOT.Array_SyntheticProvider')
    debugger.HandleCommand('type synthetic add -x "^Object$" -l NativeAOT.Object_SyntheticProvider')

def String_SummaryProvider(valobj, internal_dict):
    valobj = valobj.GetNonSyntheticValue()
    strval = '"'
    try:
        length = valobj.GetChildMemberWithName('_stringLength').GetValueAsUnsigned()
        chars = valobj.GetChildMemberWithName('_firstChar').address_of.GetPointeeData(0, length).uint16
        for i in range(0, length):
            strval += chr(chars[i])
    except:
        pass
    strval = strval + '"'
    return strval

def Array_SummaryProvider(valobj, internal_dict):
   return 'length=' + str(valobj.GetNonSyntheticValue().GetChildMemberWithName('_numComponents').GetValueAsUnsigned())

class Array_SyntheticProvider:
    def __init__(self, valobj, internal_dict):
        self.valobj = valobj

    def num_children(self):
        return self.valobj.GetChildMemberWithName('_numComponents').GetValueAsUnsigned()

    def get_child_index(self,name):
        try:
            return int(name.lstrip('[').rstrip(']'))
        except:
            return None

    def get_child_at_index(self,index):
        type = self.valobj.GetChildMemberWithName('m_Data').GetType().GetArrayElementType()
        return self.valobj.GetChildMemberWithName('_numComponents').address_of.CreateChildAtOffset('[' + str(index) + ']', self.valobj.target.GetAddressByteSize() + index * type.GetByteSize(), type)

class Object_SyntheticProvider:
    def __init__(self, valobj, internal_dict):
        self.valobj = valobj

    def num_children(self):
        return 0