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# Python GDB formatters for parallel-hashmap
# tested with GCC 10.2 / GDB 9.2
# to install it, ensure the script location is in the Python path
# and type the following command (or put it in $HOME/.gdbinit):
# python
# import phmap_gdb
# end
import gdb.printing
def counter():
i = 0
while(True):
yield str(i)
i += 1
def slot_iterator(base_obj):
index = -1
n_items = 0
size = int(base_obj["size_"])
while n_items < size:
index += 1
if int(base_obj["ctrl_"][index]) < 0:
continue
n_items += 1
yield base_obj["slots_"][index]
def parallel_slot_iterator(base_obj):
array = base_obj["sets_"]
array_len = int(array.type.template_argument(1))
for index in range(array_len):
obj = array["_M_elems"][index]["set_"]
yield from slot_iterator(obj)
def flat_map_iterator(name, item):
yield (next(name), item["value"]["first"])
yield (next(name), item["value"]["second"])
def flat_set_iterator(name, item):
yield (next(name), item)
def node_map_iterator(name, item):
yield (next(name), item.dereference()["first"])
yield (next(name), item.dereference()["second"])
def node_set_iterator(name, item):
yield (next(name), item.dereference())
def traverse(iterator, slot_type_iterator):
name = counter()
for item in iterator:
yield from slot_type_iterator(name, item)
def parallel_size(parallel_hash_obj):
array = parallel_hash_obj["sets_"]
array_len = int(array.type.template_argument(1))
size = 0
for index in range(array_len):
size += array["_M_elems"][index]["set_"]["size_"]
return size
class FlatMapPrinter:
def __init__(self, val):
self.val = val
def children(self):
return traverse(slot_iterator(self.val), flat_map_iterator)
def to_string(self):
return f"phmap::flat_hash_map with {int(self.val['size_'])} elements"
def display_hint(self):
return "map"
class FlatSetPrinter:
def __init__(self, val):
self.val = val
def children(self):
return traverse(slot_iterator(self.val), flat_set_iterator)
def to_string(self):
return f"phmap::flat_hash_set with {int(self.val['size_'])} elements"
def display_hint(self):
return "array"
class NodeMapPrinter:
def __init__(self, val):
self.val = val
def children(self):
return traverse(slot_iterator(self.val), node_map_iterator)
def to_string(self):
return f"phmap::node_hash_map with {int(self.val['size_'])} elements"
def display_hint(self):
return "map"
class NodeSetPrinter:
def __init__(self, val):
self.val = val
def children(self):
return traverse(slot_iterator(self.val), node_set_iterator)
def to_string(self):
return f"phmap::node_hash_set with {int(self.val['size_'])} elements"
def display_hint(self):
return "array"
class ParallelFlatMapPrinter:
def __init__(self, val):
self.val = val
def children(self):
return traverse(parallel_slot_iterator(self.val), flat_map_iterator)
def to_string(self):
return f"phmap::parallel_flat_hash_map with {parallel_size(self.val)} elements"
def display_hint(self):
return "map"
class ParallelFlatSetPrinter:
def __init__(self, val):
self.val = val
def children(self):
return traverse(parallel_slot_iterator(self.val), flat_set_iterator)
def to_string(self):
return f"phmap::parallel_flat_hash_set with {parallel_size(self.val)} elements"
def display_hint(self):
return "array"
class ParallelNodeMapPrinter:
def __init__(self, val):
self.val = val
def children(self):
return traverse(parallel_slot_iterator(self.val), node_map_iterator)
def to_string(self):
return f"phmap::parallel_node_hash_map with {parallel_size(self.val)} elements"
def display_hint(self):
return "map"
class ParallelNodeSetPrinter:
def __init__(self, val):
self.val = val
def children(self):
return traverse(parallel_slot_iterator(self.val), node_set_iterator)
def to_string(self):
return f"phmap::parallel_node_hash_set with {parallel_size(self.val)} elements"
def display_hint(self):
return "array"
def build_pretty_printer():
pp = gdb.printing.RegexpCollectionPrettyPrinter("phmap")
pp.add_printer('flat_hash_map', '^phmap::flat_hash_map<.*>$', FlatMapPrinter)
pp.add_printer('flat_hash_set', '^phmap::flat_hash_set<.*>$', FlatSetPrinter)
pp.add_printer('node_hash_map', '^phmap::node_hash_map<.*>$', NodeMapPrinter)
pp.add_printer('node_hash_set', '^phmap::node_hash_set<.*>$', NodeSetPrinter)
pp.add_printer('parallel_flat_hash_map', '^phmap::parallel_flat_hash_map<.*>$', ParallelFlatMapPrinter)
pp.add_printer('parallel_flat_hash_set', '^phmap::parallel_flat_hash_set<.*>$', ParallelFlatSetPrinter)
pp.add_printer('parallel_node_hash_map', '^phmap::parallel_node_hash_map<.*>$', ParallelNodeMapPrinter)
pp.add_printer('parallel_node_hash_set', '^phmap::parallel_node_hash_set<.*>$', ParallelNodeSetPrinter)
return pp
gdb.printing.register_pretty_printer(gdb.current_objfile(), build_pretty_printer())
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