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Fixed potential crash with new() in anonymous functions (is that even allowed?); Added compile-time check for disallowed new()

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This commit is contained in:
ZZYZX 2017-03-03 22:52:35 +02:00
parent 3a57a9809f
commit 421f78c771
1 changed files with 15 additions and 1 deletions
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16
src/scripting/backend/codegen.cpp
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@ -99,7 +99,9 @@ static const FLOP FxFlops[] =
// this can be imported in vmexec.h // this can be imported in vmexec.h
void FScopeBarrier_ValidateNew(PClass* cls, PFunction* callingfunc) void FScopeBarrier_ValidateNew(PClass* cls, PFunction* callingfunc)
{ {
int outerside = FScopeBarrier::SideFromFlags(callingfunc->Variants[0].Flags); int outerside = callingfunc->Variants.Size() ? FScopeBarrier::SideFromFlags(callingfunc->Variants[0].Flags) : FScopeBarrier::Side_Virtual;
if (outerside == FScopeBarrier::Side_Virtual)
outerside = FScopeBarrier::SideFromObjectFlags(callingfunc->OwningClass->ObjectFlags);
int innerside = FScopeBarrier::SideFromObjectFlags(cls->ObjectFlags); int innerside = FScopeBarrier::SideFromObjectFlags(cls->ObjectFlags);
if ((outerside != innerside) && (innerside != FScopeBarrier::Side_PlainData)) // "cannot construct ui class ... from data context" if ((outerside != innerside) && (innerside != FScopeBarrier::Side_PlainData)) // "cannot construct ui class ... from data context"
ThrowAbortException(X_OTHER, "Cannot construct %s class %s from %s context", FScopeBarrier::StringFromSide(innerside), cls->TypeName.GetChars(), FScopeBarrier::StringFromSide(outerside)); ThrowAbortException(X_OTHER, "Cannot construct %s class %s from %s context", FScopeBarrier::StringFromSide(innerside), cls->TypeName.GetChars(), FScopeBarrier::StringFromSide(outerside));
@ -5095,6 +5097,18 @@ FxExpression *FxNew::Resolve(FCompileContext &ctx)
return nullptr; return nullptr;
} }
//
int outerside = ctx.Function && ctx.Function->Variants.Size() ? FScopeBarrier::SideFromFlags(ctx.Function->Variants[0].Flags) : FScopeBarrier::Side_Virtual;
if (outerside == FScopeBarrier::Side_Virtual)
outerside = FScopeBarrier::SideFromObjectFlags(ctx.Class->ObjectFlags);
int innerside = FScopeBarrier::SideFromObjectFlags(cls->ObjectFlags);
if ((outerside != innerside) && (innerside != FScopeBarrier::Side_PlainData)) // "cannot construct ui class ... from data context"
{
ScriptPosition.Message(MSG_ERROR, "Cannot construct %s class %s from %s context", FScopeBarrier::StringFromSide(innerside), cls->TypeName.GetChars(), FScopeBarrier::StringFromSide(outerside));
delete this;
return nullptr;
}
ValueType = NewPointer(cls); ValueType = NewPointer(cls);
} }