diff options
| -rw-r--r-- | bird-gdb.py | 81 |
1 files changed, 30 insertions, 51 deletions
diff --git a/bird-gdb.py b/bird-gdb.py index fe7827fe..5ed99259 100644 --- a/bird-gdb.py +++ b/bird-gdb.py @@ -1,3 +1,6 @@ +import itertools +import functools + class BIRDPrinter: def __init__(self, val): self.val = val @@ -198,12 +201,20 @@ class BIRDList: if str(self.tail_node["prev"].address) == '0x0': raise Exception("List tail is NULL") - def walk(self, do): + def __iter__(self): cur = self.head while cur.dereference() != self.tail_node: - do(cur) + yield cur cur = cur.dereference()["next"] + def __len__(self): + return sum([1 for _ in self]) + + def __getitem__(self, key): + for item in itertools.islice(self, key): + return item + + raise KeyError("Not enough elements in list") class BIRDListLength(gdb.Function): """Returns length of the list, as in @@ -211,13 +222,8 @@ class BIRDListLength(gdb.Function): 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 + return len(BIRDList(l)) BIRDListLength() @@ -226,30 +232,11 @@ class BIRDListItem(gdb.Function): 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") + if t is None: + return BIRDList(l)[n] + else: + return BIRD.skip_back(t, item, BIRDList(l)[n]) BIRDListItem() @@ -340,14 +327,13 @@ class BIRDSlabResource(BIRDResource): self.val = val.cast(self.slabtype) self.info = None - def count_heads_item(self, item): - self.hcnt += 1 - self.used += item.dereference().cast(self.slheadtype)["num_full"] - def count_heads(self, which): self.hcnt = 0 self.used = 0 - BIRDList(self.val[which + "_heads"]).walk(self.count_heads_item) + for item in BIRDList(self.val[which + "_heads"]): + self.hcnt += 1 + self.used += item.dereference().cast(self.slheadtype)["num_full"] + self.info[which + "_heads"] = self.hcnt self.info[which + "_used"] = self.used return (self.hcnt, self.used) @@ -388,14 +374,14 @@ class BIRDPoolResource(BIRDResource): self.resptrtype = gdb.lookup_type("struct resource").pointer() self.page_size = gdb.lookup_symbol("page_size")[0].value() self.val = val.cast(self.pooltype) - self.items = None + self.inside = BIRDList(self.val["inside"]) - def parse_inside(self, val): - self.items.append(BIRDNewResource(val.cast(self.resptrtype).dereference())) + def __iter__(self): + for val in self.inside: + yield BIRDNewResource(val.cast(self.resptrtype).dereference()) - def parse(self): - self.items = [] - BIRDList(self.val["inside"]).walk(self.parse_inside) + def __len__(self): + return len(self.inside) def free_pages(self): if str(self.val['pages']) == '0x0': @@ -404,9 +390,6 @@ class BIRDPoolResource(BIRDResource): return self.val['pages'].dereference()['free'] def memsize(self): - if self.items is None: - self.parse() - sum = BIRDResourceSize(0, self.pooltype.sizeof, self.free_pages() * self.page_size) # for i in self.items: # sum += i.memsize() @@ -414,13 +397,10 @@ class BIRDPoolResource(BIRDResource): return sum def __str__(self): - if self.items is None: - self.parse() - # for i in self.items: # print(i) - return f"Resource pool {self.val.address} \"{self.val['name'].string()}\" containing {len(self.items)} items and {self.free_pages()} free pages" + return f"Resource pool {self.val.address} \"{self.val['name'].string()}\" containing {len(self)} items and {self.free_pages()} free pages" BIRDResourceMap = { "mbl_memsize": BIRDMBResource, @@ -446,14 +426,13 @@ class BIRDResourcePrinter(BIRDPrinter): def __init__(self, val): super(BIRDResourcePrinter, self).__init__(val) self.resource = BIRDNewResource(val) - self.resource.parse() self.resourcetype = gdb.lookup_type("struct resource") if type(self.resource) == BIRDPoolResource: self.children = self.pool_children def pool_children(self): - return iter([ ("\n", i.val.cast(self.resourcetype)) for i in self.resource.items ]) + return iter([ ("\n", i.val.cast(self.resourcetype)) for i in self.resource ]) def to_string(self): return f"[ {str(self.resource.memsize())} ] {str(self.resource)}" |