+ 0000478: Segfault on insert part into 2D drawing (workaround)

git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5144 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d

src/Mod/Drawing/App/CMakeLists.txt

@@ -60,6 +60,12 @@ if(MSVC)
     ADD_MSVC_PRECOMPILED_HEADER("PreCompiled.h" "PreCompiled.cpp" Drawing_CPP_SRCS)
 endif(MSVC)
 
+# Set special compiler flag to convert a SIGSEV into an exception
+# to handle issue #0000478.
+IF(MSVC)
+SET_SOURCE_FILES_PROPERTIES(ProjectionAlgos.cpp PROPERTIES COMPILE_FLAGS "/EHa")
+ENDIF(MSVC)
+
 add_library(Drawing SHARED ${Drawing_SRCS} ${Features_SRCS} ${DrawingAlgos_SRCS})
 target_link_libraries(Drawing ${Drawing_LIBS})
 fc_copy_script("Mod/Drawing" "Drawing" Init.py)

src/Mod/Drawing/App/FeatureProjection.cpp

@@ -77,6 +77,7 @@ App::DocumentObjectExecReturn *FeatureProjection::execute(void)
     if (shape.IsNull())
         return new App::DocumentObjectExecReturn("Linked shape object is empty");
 
+    try {
         const Base::Vector3f& dir = Direction.getValue();
         Drawing::ProjectionAlgos alg(shape, dir);
 
@@ -107,3 +108,8 @@ App::DocumentObjectExecReturn *FeatureProjection::execute(void)
         Shape.setValue(comp);
         return App::DocumentObject::StdReturn;
     }
+    catch (Standard_Failure) {
+        Handle_Standard_Failure e = Standard_Failure::Caught();
+        return new App::DocumentObjectExecReturn(e->GetMessageString());
+    }
+}

src/Mod/Drawing/App/ProjectionAlgos.cpp

@@ -119,11 +119,19 @@ void ProjectionAlgos::execute(void)
     Handle( HLRBRep_Algo ) brep_hlr = new HLRBRep_Algo;
     brep_hlr->Add(Input);
 
+    try {
+#if defined(__GNUC__) && defined (FC_OS_LINUX)
+        Base::SignalException se;
+#endif
         gp_Ax2 transform(gp_Pnt(0,0,0),gp_Dir(Direction.x,Direction.y,Direction.z));
         HLRAlgo_Projector projector( transform );
         brep_hlr->Projector(projector);
         brep_hlr->Update();
         brep_hlr->Hide();
+    }
+    catch (...) {
+        Standard_Failure::Raise("Fatal error occurred while projecting shape");
+    }
 
     // extracting the result sets:
     HLRBRep_HLRToShape shapes( brep_hlr );