lunaix-os/scripts/gdb/lunadbg/structs/signal.py

   1 from gdb import Type, Value, lookup_type
   2 from . import KernelStruct
   3 from ..pp import MyPrettyPrinter
   4
   5 class SignalContext(KernelStruct):
   6     __SIGNUM = 16
   7     def __init__(self, gdb_inferior: Value) -> None:
   8         super().__init__(gdb_inferior, SignalContext)
   9
  10     @staticmethod
  11     def get_type() -> Type:
  12         return lookup_type("struct sigctx").pointer()
  13
  14     def print_abstract(self, pp : MyPrettyPrinter, *args):
  15         sigactive = self._kstruct["sig_active"]
  16         sigpending = SignalHelper.get_sig_bitmap(self._kstruct["sig_pending"])
  17
  18         pp.print(f"sig: handling={sigactive}, pending=[{sigpending}]")
  19
  20     def print_simple(self, pp : MyPrettyPrinter, *args):
  21         pp.print_field(self._kstruct, "sig_active")
  22         pp.print_field(self._kstruct, "sig_pending", cast=SignalHelper.get_sig_bitmap)
  23         pp.print_field(self._kstruct, "sig_mask", cast=SignalHelper.get_sig_bitmap)
  24
  25         order = []
  26         active = int(self._kstruct['sig_active'])
  27         sig_order = self._kstruct["sig_order"]
  28         while active != 0:
  29             order.append(str(active))
  30             active = int(sig_order[active])
  31
  32         pp.print("nestings:", ' -> '.join(reversed(order)))
  33
  34     def print_detailed(self, pp, *args):
  35         self.print_simple(pp)
  36
  37
  38
  39 class SignalHelper:
  40
  41     @staticmethod
  42     def get_sig_bitmap(sigbmp):
  43         if sigbmp == 0:
  44             return '<None>'
  45         v = []
  46         i = 0
  47         while sigbmp != 0:
  48             if sigbmp & 1 != 0:
  49                 v.append(str(i))
  50             sigbmp = sigbmp >> 1
  51             i+=1
  52         return ",".join(v)