mirror of
https://gitlab.labs.nic.cz/labs/bird.git
synced 2024-05-11 16:54:54 +00:00
266 lines
8.7 KiB
Python
266 lines
8.7 KiB
Python
class BIRDPrinter:
|
|
def __init__(self, val):
|
|
self.val = val
|
|
|
|
@classmethod
|
|
def lookup(cls, val):
|
|
if val.type.code != cls.typeCode:
|
|
return None
|
|
if val.type.tag != cls.typeTag:
|
|
return None
|
|
|
|
return cls(val)
|
|
|
|
|
|
class BIRDFValPrinter(BIRDPrinter):
|
|
"Print BIRD\s struct f_val"
|
|
typeCode = gdb.TYPE_CODE_STRUCT
|
|
typeTag = "f_val"
|
|
|
|
codemap = {
|
|
"T_INT": "i",
|
|
"T_BOOL": "i",
|
|
"T_PAIR": "i",
|
|
"T_QUAD": "i",
|
|
"T_ENUM_RTS": "i",
|
|
"T_ENUM_BGP_ORIGIN": "i",
|
|
"T_ENUM_SCOPE": "i",
|
|
"T_ENUM_RTD": "i",
|
|
"T_ENUM_ROA": "i",
|
|
"T_ENUM_NETTYPE": "i",
|
|
"T_ENUM_RA_PREFERENCE": "i",
|
|
"T_ENUM_AF": "i",
|
|
"T_IP": "ip",
|
|
"T_NET": "net",
|
|
"T_STRING": "s",
|
|
"T_PATH_MASK": "path_mask",
|
|
"T_PATH": "ad",
|
|
"T_CLIST": "ad",
|
|
"T_EC": "ec",
|
|
"T_ECLIST": "ad",
|
|
"T_LC": "lc",
|
|
"T_LCLIST": "ad",
|
|
"T_RD": "ec",
|
|
"T_PATH_MASK_ITEM": "pmi",
|
|
"T_SET": "t",
|
|
"T_PREFIX_SET": "ti",
|
|
}
|
|
|
|
def to_string(self):
|
|
code = self.val['type']
|
|
if code.type.code != gdb.TYPE_CODE_ENUM or code.type.tag != "f_type":
|
|
raise Exception("Strange 'type' element in f_val")
|
|
|
|
if str(code) == "T_VOID":
|
|
return "T_VOID"
|
|
else:
|
|
return "(%(c)s) %(v)s" % { "c": code, "v": self.val['val'][self.codemap[str(code)]] }
|
|
|
|
def display_hint(self):
|
|
return "map"
|
|
|
|
class BIRDFValStackPrinter(BIRDPrinter):
|
|
"Print BIRD's struct f_val_stack"
|
|
typeCode = gdb.TYPE_CODE_STRUCT
|
|
typeTag = "f_val_stack"
|
|
|
|
def to_string(self):
|
|
cnt = self.val['cnt']
|
|
return ("Value stack (%(cnt)d):\n\t" % { "cnt": cnt }) + \
|
|
"\n\t".join([ (".val[%(n) 3d] = " % { "n": n}) + str(self.val['val'][n]) for n in range(cnt-1, -1, -1) ])
|
|
|
|
def display_hint(self):
|
|
return "map"
|
|
|
|
class BIRDFInstPrinter(BIRDPrinter):
|
|
"Print BIRD's struct f_inst"
|
|
typeCode = gdb.TYPE_CODE_STRUCT
|
|
typeTag = "f_inst"
|
|
|
|
def to_string(self):
|
|
code = self.val['fi_code']
|
|
if str(code) == "FI_NOP":
|
|
return str(code) + ": " + str(self.val.cast(gdb.lookup_type("const char [%(siz)d]" % { "siz": self.val.type.sizeof })))
|
|
return "%(code)s:\t%(lineno) 6dL\t%(size)6dS\tnext = %(next)s: .i_%(code)s = %(union)s" % {
|
|
"code": str(code),
|
|
"lineno": self.val['lineno'],
|
|
"size": self.val['size'],
|
|
"next": str(self.val['next']),
|
|
"union": str(self.val['i_' + str(code)])
|
|
}
|
|
|
|
# def children(self): # children iterator
|
|
def display_hint(self):
|
|
return "map"
|
|
|
|
class BIRDFLineItemPrinter(BIRDPrinter):
|
|
"Print BIRD's struct f_line_item"
|
|
typeCode = gdb.TYPE_CODE_STRUCT
|
|
typeTag = "f_line_item"
|
|
|
|
def to_string(self):
|
|
code = self.val['fi_code']
|
|
if str(code) == "FI_NOP":
|
|
return str(code) + ": " + str(self.val.cast(gdb.lookup_type("const char [%(siz)d]" % { "siz": self.val.type.sizeof })))
|
|
return "%(code)s:\t%(lineno) 6dL\t%(flags)2dF: .i_%(code)s = %(union)s" % {
|
|
"code": str(code),
|
|
"lineno": self.val['lineno'],
|
|
"flags": self.val['flags'],
|
|
"union": str(self.val['i_' + str(code)])
|
|
}
|
|
|
|
class BIRDFLinePrinter(BIRDPrinter):
|
|
"Print BIRD's struct f_line"
|
|
typeCode = gdb.TYPE_CODE_STRUCT
|
|
typeTag = "f_line"
|
|
|
|
def to_string(self):
|
|
cnt = self.val['len']
|
|
return ("FLine (%(cnt)d, args=%(args)d): " % { "cnt": cnt, "args" : self.val['args'] } + \
|
|
", ".join([
|
|
".items[%(n) 3d] = %(code)s" % {
|
|
"n": n,
|
|
"code": str(self.val['items'][n]['fi_code']),
|
|
} if n % 8 == 0 else str(self.val['items'][n]['fi_code']) for n in range(cnt)]))
|
|
|
|
|
|
class BIRDFExecStackPrinter(BIRDPrinter):
|
|
"Print BIRD's struct f_exec_stack"
|
|
typeCode = gdb.TYPE_CODE_STRUCT
|
|
typeTag = "f_exec_stack"
|
|
|
|
def to_string(self):
|
|
cnt = self.val['cnt']
|
|
return ("Exec stack (%(cnt)d):\n\t" % { "cnt": cnt }) + \
|
|
"\n\t".join([ ".item[%(n) 3d] = %(retflag)d V%(ventry) 3d P%(pos) 4d %(line)s" % {
|
|
"retflag": self.val['item'][n]['emask'],
|
|
"ventry": self.val['item'][n]['ventry'],
|
|
"pos": self.val['item'][n]['pos'],
|
|
"line": str(self.val['item'][n]['line'].dereference()),
|
|
"n": n
|
|
} for n in range(cnt-1, -1, -1) ])
|
|
|
|
|
|
class BIRD:
|
|
def skip_back(t, i, v):
|
|
if isinstance(t, str):
|
|
t = gdb.lookup_type(t)
|
|
elif isinstance(t, gdb.Value):
|
|
t = gdb.lookup_type(t.string())
|
|
elif not isinstance(t, gdb.Type):
|
|
raise Exception(f"First argument of skip_back(t, i, v) must be a type, got {type(t)}")
|
|
|
|
t = t.strip_typedefs()
|
|
nullptr = gdb.Value(0).cast(t.pointer())
|
|
|
|
if isinstance(i, gdb.Value):
|
|
i = i.string()
|
|
elif not isinstance(i, str):
|
|
raise Exception(f"Second argument of skip_back(t, i, v) must be a item name, got {type(i)}")
|
|
|
|
if not isinstance(v, gdb.Value):
|
|
raise Exception(f"Third argument of skip_back(t, i, v) must be a value, got {type(v)}")
|
|
if v.type.code != gdb.TYPE_CODE_PTR and v.type.code != gdb.TYPE_CODE_REF:
|
|
raise Exception(f"Third argument of skip_back(t, i, v) must be a pointer, is {v.type} ({v.type.code})")
|
|
if v.type.target().strip_typedefs() != nullptr[i].type:
|
|
raise Exception(f"Third argument of skip_back(t, i, v) points to type {v.type.target().strip_typedefs()}, should be {nullptr[i].type}")
|
|
|
|
uintptr_t = gdb.lookup_type("uintptr_t")
|
|
taddr = v.dereference().address.cast(uintptr_t) - nullptr[i].address.cast(uintptr_t)
|
|
return gdb.Value(taddr).cast(t.pointer())
|
|
|
|
class skip_back_gdb(gdb.Function):
|
|
"Given address of a structure item, returns address of the structure, as the SKIP_BACK macro does"
|
|
def __init__(self):
|
|
gdb.Function.__init__(self, "SKIP_BACK")
|
|
|
|
def invoke(self, t, i, v):
|
|
return BIRD.skip_back(t, i, v)
|
|
|
|
|
|
BIRD.skip_back_gdb()
|
|
|
|
|
|
class BIRDList:
|
|
def __init__(self, val):
|
|
ltype = val.type.strip_typedefs()
|
|
if ltype.code != gdb.TYPE_CODE_UNION or ltype.tag != "list":
|
|
raise Exception(f"Not a list, is type {ltype}")
|
|
|
|
self.head = val["head"]
|
|
self.tail_node = val["tail_node"]
|
|
|
|
if str(self.head.address) == '0x0':
|
|
raise Exception("List head is NULL")
|
|
|
|
if str(self.tail_node["prev"].address) == '0x0':
|
|
raise Exception("List tail is NULL")
|
|
|
|
def walk(self, do):
|
|
cur = self.head
|
|
while cur.dereference() != self.tail_node:
|
|
do(cur)
|
|
cur = cur.dereference()["next"]
|
|
|
|
|
|
class BIRDListLength(gdb.Function):
|
|
"""Returns length of the list, as in
|
|
print $list_length(routing_tables)"""
|
|
def __init__(self):
|
|
super(BIRDListLength, self).__init__("list_length")
|
|
|
|
def count(self, _):
|
|
self.cnt += 1
|
|
|
|
def invoke(self, l):
|
|
self.cnt = 0
|
|
BIRDList(l).walk(self.count)
|
|
return self.cnt
|
|
|
|
BIRDListLength()
|
|
|
|
class BIRDListItem(gdb.Function):
|
|
"""Returns n-th item of the list."""
|
|
def __init__(self):
|
|
super(BIRDListItem, self).__init__("list_item")
|
|
|
|
class BLException(Exception):
|
|
def __init__(self, node, msg):
|
|
Exception.__init__(self, msg)
|
|
self.node = node
|
|
|
|
def count(self, node):
|
|
if self.cnt == self.pos:
|
|
raise self.BLException(node, "Node found")
|
|
|
|
self.cnt += 1
|
|
|
|
def invoke(self, l, n, t=None, item="n"):
|
|
self.cnt = 0
|
|
self.pos = n
|
|
bl = BIRDList(l)
|
|
try:
|
|
bl.walk(self.count)
|
|
except self.BLException as e:
|
|
if t is None:
|
|
return e.node
|
|
else:
|
|
return BIRD.skip_back(t, item, e.node)
|
|
|
|
raise Exception("List too short")
|
|
|
|
BIRDListItem()
|
|
|
|
|
|
def register_printers(objfile):
|
|
objfile.pretty_printers.append(BIRDFInstPrinter.lookup)
|
|
objfile.pretty_printers.append(BIRDFValPrinter.lookup)
|
|
objfile.pretty_printers.append(BIRDFValStackPrinter.lookup)
|
|
objfile.pretty_printers.append(BIRDFLineItemPrinter.lookup)
|
|
objfile.pretty_printers.append(BIRDFLinePrinter.lookup)
|
|
objfile.pretty_printers.append(BIRDFExecStackPrinter.lookup)
|
|
|
|
register_printers(gdb.current_objfile())
|
|
|
|
print("BIRD pretty printers loaded OK.")
|