GDB: BIRD linked list printer (0f383f70) · Commits · 戴 / Bird

bird-gdb.py

+46 −2

Original line number	Diff line number	Diff line
		@@ -5,13 +5,32 @@ class BIRDPrinter:
		@classmethod
		def lookup(cls, val):
		# print(cls.typeCode, cls.typeTag, val.type.code, val.type.tag)
		if val.type.code != cls.typeCode:
		baseType = val.type.strip_typedefs()
		if baseType.code != cls.typeCode:
		return None
		if val.type.tag != cls.typeTag:
		if baseType.tag != cls.typeTag:
		return None

		return cls(val)

		class BIRDListPrinter(BIRDPrinter):
		typeCode = gdb.TYPE_CODE_UNION
		typeTag = "list"

		def to_string(self):
		blist = self.val
		if blist.type.code == gdb.TYPE_CODE_PTR:
		blist = blist.dereference()

		out = []

		head = blist['head']['next']
		while head and head['next'] != 0:
		out.append(str(head))
		head = head['next']

		return "(list) [" + ", ".join(out) + "]"


		class BIRDFValPrinter(BIRDPrinter):
		"Print BIRD\s struct f_val"
		@@ -236,6 +255,7 @@ class BIRDWQStateLogPrinter(BIRDPrinter):
		}[str(self.val['what'])]()

		def register_printers(objfile):
		objfile.pretty_printers.append(BIRDListPrinter.lookup)
		objfile.pretty_printers.append(BIRDFInstPrinter.lookup)
		objfile.pretty_printers.append(BIRDFValPrinter.lookup)
		objfile.pretty_printers.append(BIRDFValStackPrinter.lookup)
		@@ -253,6 +273,29 @@ class BIRDCommand(gdb.Command):
		def invoke(self, argument, from_tty):
		pass

		class BIRDListCommand(gdb.Command):
		def __init__(self):
		super().__init__("bird list", gdb.COMMAND_DATA, gdb.COMPLETE_EXPRESSION)

		def invoke(self, argument, from_tty):
		args = gdb.string_to_argv(argument)
		nodeType = None
		if len(args) == 1:
		nodeType = gdb.lookup_type("struct node")
		elif len(args) == 2:
		nodeType = gdb.lookup_type(args[1])
		else:
		raise Exception("Usage: bird list <list> [<node type>]")

		blist = gdb.parse_and_eval(args[0])
		if blist.type.code == gdb.TYPE_CODE_PTR:
		blist = blist.dereference()

		head = blist['head']['next']
		while head and head['next'] != 0:
		print(head.cast(nodeType))
		head = head['next']

		class BIRDWQCommand(gdb.Command):
		def __init__(self):
		super().__init__("bird wq", gdb.COMMAND_NONE, gdb.COMPLETE_COMMAND, True)
		@@ -283,6 +326,7 @@ class BIRDWQStateLogCommand(gdb.Command):
		print("%(idx) 5d" % { "idx": idx }, wq["statelog"][idx])

		BIRDCommand()
		BIRDListCommand()
		BIRDWQCommand()
		BIRDWQStateLogCommand()

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