The problem for these xmethods is that in Python 3 division of two
integers produces a float, and GDB then doesn't allow that value
to be used for pointer arithmetic (https://sourceware.org/PR20622).
PR libstdc++/77645
* python/libstdcxx/v6/xmethods.py (DequeWorkerBase.__init__)
(DequeWorkerBase.index, VectorWorkerBase.get): Cast results of
division to int to work with Python 3.
Tested x86_64-linux, committed to trunk.
I'll fix it for gcc-5 and gcc-6 too.
commit a1eda07dc44e271ea07c266624b600cbae257b58
Author: Jonathan Wakely <jwak...@redhat.com>
Date: Mon Sep 19 18:02:36 2016 +0100
libstdc++/77645 fix deque and vector xmethods for Python 3
PR libstdc++/77645
* python/libstdcxx/v6/xmethods.py (DequeWorkerBase.__init__)
(DequeWorkerBase.index, VectorWorkerBase.get): Cast results of
division to int to work with Python 3.
diff --git a/libstdc++-v3/python/libstdcxx/v6/xmethods.py
b/libstdc++-v3/python/libstdcxx/v6/xmethods.py
index 95f9af9..71a5b75 100644
--- a/libstdc++-v3/python/libstdcxx/v6/xmethods.py
+++ b/libstdc++-v3/python/libstdcxx/v6/xmethods.py
@@ -165,7 +165,7 @@ class ArrayMethodsMatcher(gdb.xmethod.XMethodMatcher):
class DequeWorkerBase(gdb.xmethod.XMethodWorker):
def __init__(self, val_type):
self._val_type = val_type
- self._bufsize = (512 / val_type.sizeof) or 1
+ self._bufsize = int(512 / val_type.sizeof) or 1
def size(self, obj):
first_node = obj['_M_impl']['_M_start']['_M_node']
@@ -176,7 +176,7 @@ class DequeWorkerBase(gdb.xmethod.XMethodWorker):
def index(self, obj, idx):
first_node = obj['_M_impl']['_M_start']['_M_node']
- index_node = first_node + idx / self._bufsize
+ index_node = first_node + int(idx / self._bufsize)
return index_node[0][idx % self._bufsize]
class DequeEmptyWorker(DequeWorkerBase):
@@ -419,7 +419,7 @@ class VectorWorkerBase(gdb.xmethod.XMethodWorker):
if self._val_type.code == gdb.TYPE_CODE_BOOL:
start = obj['_M_impl']['_M_start']['_M_p']
bit_size = start.dereference().type.sizeof * 8
- valp = start + index / bit_size
+ valp = start + int(index / bit_size)
offset = index % bit_size
return (valp.dereference() & (1 << offset)) > 0
else:
