OpenCascade/occt
1
0
Fork 0
mirror of https://git.dev.opencascade.org/repos/occt.git synced 2025-08-14 13:30:48 +03:00
Code Activity

0029669: Crash on opening a document with same Ocaf attributes with different IDs

Browse Source 
Added protection against clash of attributes with the same GUID when more than one attribute of the same type but with different GUIDs are stored in the file.
If attribute with default GUID has already been read, then adding next empty attribute of the same type (done at start of its reading) will fail; in such case another attempt is made with Null GUID.
This commit is contained in:
abv
2018-05-25 21:26:45 +03:00
parent 61ace3dc72
commit 60fddce474
3 changed files with 77 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/XmlMDF/XmlMDF.cxx
View File

@@ -36,6 +36,7 @@
#include <XmlLDrivers.hxx>
#include <TDocStd_Owner.hxx>
#include <TDocStd_Document.hxx>
#include <Standard_GUID.hxx>
IMPLEMENT_DOMSTRING (TagString, "tag")
IMPLEMENT_DOMSTRING (LabelString, "label")
@@ -257,8 +258,24 @@ Standard_Integer XmlMDF::ReadSubTree (const XmlObjMgt_Element& theElement,
tAtt = Handle(TDF_Attribute)::DownCast(theRelocTable.Find(anID));
else
tAtt = driver -> NewEmpty();
if (tAtt->Label().IsNull())
theLabel.AddAttribute (tAtt);
if (tAtt->Label().IsNull())
{
try
{
theLabel.AddAttribute (tAtt);
}
catch (const Standard_DomainError&)
{
// For attributes that can have arbitrary GUID (e.g. TDataStd_Integer), exception
// will be raised in valid case if attribute of that type with default GUID is already
// present on the same label; the reason is that actual GUID will be read later.
// To avoid this, set invalid (null) GUID to the newly added attribute (see #29669)
static const Standard_GUID fbidGuid;
tAtt->SetID (fbidGuid);
theLabel.AddAttribute (tAtt);
}
}
else
driver->myMessageDriver->Send
(TCollection_ExtendedString("XmlDriver warning: ") +