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Debugger: Fake contents of empty base classes with LLDB

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A truly empty base wouldn't need content, but LLDB 3.8 reports declared
but not defined undistinguishable from empty bases. At least for the
common case of a single inheritance class we can continue dumping by
fake base class contents by fake the contents by using the whole derived
object's data.

Change-Id: I82d595b985ec1289d8abce5fccd217057d2d2d44
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
This commit is contained in:
hjk
2016-11-18 18:07:11 +01:00
parent 6de88f7fae
commit 286f089e55
1 changed files with 17 additions and 2 deletions
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19
share/qtcreator/debugger/lldbbridge.py
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@@ -298,8 +298,23 @@ class Dumper(DumperBase):
member.type = self.fromNativeType(fieldType)
member.name = fieldName
member.fields = []
member.ldata = bytes()
member.lbitsize = fieldType.GetByteSize() * 8
if False:
# This would be correct if we came here only for
# truly empty base classes. Alas, we don't, see below.
member.ldata = bytes()
member.lbitsize = fieldType.GetByteSize() * 8
else:
# This is a hack. LLDB 3.8 reports declared but not defined
# types as having no fields and(!) size == 1. At least
# for the common case of a single base class we can
# fake the contents by using the whole derived object's
# data as base class data.
data = fakeValue.GetData()
size = nativeType.GetByteSize()
member.lbitsize = size * 8
error = lldb.SBError()
member.laddress = value.laddress
member.ldata = data.ReadRawData(error, 0, size)
member.isBaseClass = True
member.ltype = self.fromNativeType(fieldType)
member.name = fieldName