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The new GDB-Python scripting API looks quite powerful and should be very useful. However writing a useful script to iterate through the fields in a struct of C or C++ is not trivial. Does any one know some solid samples that does exactly that? Thanks in advance. Update the final sample: Replace the _print_fields() in early sample. if l.type.code == gdb.TYPE_CODE_STRUCT: print "Found a struct %s " % n #self._print_fields(n, t) self._print_deep_items(n, t, l) else: print "Found no struct" def _print_deep_items (self, n_, type_, instance_): for fld in type_.fields(): fn = fld.name ft = fld.type fv = instance_[fn] if fv.type.code == gdb.TYPE_CODE_STRUCT: print " Found a sub struct %s " % fn self._print_deep_items(fn, ft, fv) else: print " Field %s " % fn, " type %s " % ft.tag, " value %s " % fv And the output: variable s1 type S1 Found a struct s1 Field v1 type None value 0 Field v2 type None value 0 Found a sub struct v3 Field w3 type None value 0 Update with the first sample: Got the following sample code working. This is not the optimal as it does a look-up on every field after composing the string field name. abarnert is showing a promising and elegant approach, the working code is updated in the above final update section. import gdb class PrintGList(gdb.Command): """print fields of a struct: wzd struct_object Iterate through the fields of a struct, and display a human-readable form of the objects.""" def __init__(self): gdb.Command.__init__(self, "wzd", gdb.COMMAND_DATA, gdb.COMPLETE_SYMBOL, True) def invoke(self, arg, from_tty): arg_list = gdb.string_to_argv(arg) if le

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