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PR libstdc++/90520 adjust Xmethod for recent unique_ptr changes

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PR libstdc++/90520
	* python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
	Raise exception if unique_ptr tuple member has unknown structure.
	* python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker.__call__):
	Adjust worker to support new __uniq_ptr_data base class. Do not
	assume field called _M_head_impl is the first tuple element.

From-SVN: r271363
This commit is contained in:
Jonathan Wakely 2019-05-18 00:08:00 +01:00 committed by Jonathan Wakely
parent b5ba95ba97
commit 1a0a374429
3 changed files with 26 additions and 4 deletions
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9
libstdc++-v3/ChangeLog
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@ -1,3 +1,12 @@
2019-05-18 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/90520
* python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
Raise exception if unique_ptr tuple member has unknown structure.
* python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker.__call__):
Adjust worker to support new __uniq_ptr_data base class. Do not
assume field called _M_head_impl is the first tuple element.
2019-05-17 François Dumont <fdumont@gcc.gnu.org>
* include/bits/stl_deque.h

2
libstdc++-v3/python/libstdcxx/v6/printers.py
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@ -197,6 +197,8 @@ class UniquePointerPrinter:
self.pointer = tuple_member['_M_head_impl']
elif head_field.is_base_class:
self.pointer = tuple_member.cast(head_field.type)
else:
raise ValueError("Unsupported implementation for tuple in unique_ptr: %s" % impl_type)
def children (self):
return SmartPtrIterator(self.pointer)

19
libstdc++-v3/python/libstdcxx/v6/xmethods.py
View File

@ -586,11 +586,22 @@ class UniquePtrGetWorker(gdb.xmethod.XMethodWorker):
def __call__(self, obj):
impl_type = obj.dereference().type.fields()[0].type.tag
if re.match('^std::(__\d+::)?__uniq_ptr_impl<.*>$', impl_type): # New implementation
return obj['_M_t']['_M_t']['_M_head_impl']
# Check for new implementations first:
if re.match('^std::(__\d+::)?__uniq_ptr_(data|impl)<.*>$', impl_type):
tuple_member = obj['_M_t']['_M_t']
elif re.match('^std::(__\d+::)?tuple<.*>$', impl_type):
return obj['_M_t']['_M_head_impl']
return None
tuple_member = obj['_M_t']
else:
return None
tuple_impl_type = tuple_member.type.fields()[0].type # _Tuple_impl
tuple_head_type = tuple_impl_type.fields()[1].type # _Head_base
head_field = tuple_head_type.fields()[0]
if head_field.name == '_M_head_impl':
return tuple_member['_M_head_impl']
elif head_field.is_base_class:
return tuple_member.cast(head_field.type)
else:
return None
class UniquePtrDerefWorker(UniquePtrGetWorker):
"Implements std::unique_ptr<T>::operator*()"