bird-gdb.py

   1 class BIRDPrinter:
   2     def __init__(self, val):
   3         self.val = val
   4
   5     @classmethod
   6     def lookup(cls, val):
   7         if val.type.code != cls.typeCode:
   8             return None
   9         if val.type.tag != cls.typeTag:
  10             return None
  11
  12         return cls(val)
  13
  14
  15 class BIRDFValPrinter(BIRDPrinter):
  16     "Print BIRD\s struct f_val"
  17     typeCode = gdb.TYPE_CODE_STRUCT
  18     typeTag = "f_val"
  19
  20     codemap = {
  21             "T_INT": "i",
  22             "T_BOOL": "i",
  23             "T_PAIR": "i",
  24             "T_QUAD": "i",
  25             "T_ENUM_RTS": "i",
  26             "T_ENUM_BGP_ORIGIN": "i",
  27             "T_ENUM_SCOPE": "i",
  28             "T_ENUM_RTC": "i",
  29             "T_ENUM_RTD": "i",
  30             "T_ENUM_ROA": "i",
  31             "T_ENUM_NETTYPE": "i",
  32             "T_ENUM_RA_PREFERENCE": "i",
  33             "T_IP": "ip",
  34             "T_NET": "net",
  35             "T_STRING": "s",
  36             "T_PATH_MASK": "path_mask",
  37             "T_PATH": "ad",
  38             "T_CLIST": "ad",
  39             "T_EC": "ec",
  40             "T_ECLIST": "ad",
  41             "T_LC": "lc",
  42             "T_LCLIST": "ad",
  43             "T_RD": "ec",
  44             "T_PATH_MASK_ITEM": "pmi",
  45             "T_SET": "t",
  46             "T_PREFIX_SET": "ti",
  47             }
  48
  49     def to_string(self):
  50         code = self.val['type']
  51         if code.type.code != gdb.TYPE_CODE_ENUM or code.type.tag != "f_type":
  52             raise Exception("Strange 'type' element in f_val")
  53
  54         if str(code) == "T_VOID":
  55             return "T_VOID"
  56         else:
  57             return "(%(c)s) %(v)s" % { "c": code, "v": self.val['val'][self.codemap[str(code)]] }
  58
  59     def display_hint(self):
  60         return "map"
  61
  62 class BIRDFInstPrinter(BIRDPrinter):
  63     "Print BIRD's struct f_inst"
  64     typeCode = gdb.TYPE_CODE_STRUCT
  65     typeTag = "f_inst"
  66
  67     def to_string(self):
  68         code = self.val['fi_code']
  69         if str(code) == "FI_NOP":
  70             return str(code) + ": " + str(self.val.cast(gdb.lookup_type("const char [%(siz)d]" % { "siz": self.val.type.sizeof })))
  71         return str(code) + ": " + str(self.val['i_' + str(code)])
  72
  73 # def children(self): # children iterator
  74     def display_hint(self):
  75         return "map"
  76
  77
  78 def register_printers(objfile):
  79     objfile.pretty_printers.append(BIRDFInstPrinter.lookup)
  80     objfile.pretty_printers.append(BIRDFValPrinter.lookup)
  81
  82 register_printers(gdb.current_objfile())
  83
  84 print("BIRD pretty printers loaded OK.")