@@ -1290,6 +1290,14 @@ package body Exp_Put_Image is
Actions := New_List (Sink_Decl, Put_Im, Result_Decl);
end if;
+ -- To avoid leaks, we need to manage the secondary stack, because Get is
+ -- returning a String allocated thereon. It might be cleaner to let the
+ -- normal mechanisms for functions returning on the secondary stack call
+ -- Set_Uses_Sec_Stack, but this expansion of 'Image is happening too
+ -- late for that.
+
+ Set_Uses_Sec_Stack (Current_Scope);
+
return Make_Expression_With_Actions (Loc,
Actions => Actions,
Expression => New_Occurrence_Of (Result_Entity, Loc));
From: Bob Duff <duff@adacore.com> Fix memory leak in 'Image by managing the secondary stack in scopes that call the new Ada 2020 'Image, which calls 'Put_Image and then Get, which returns on the secondary stack. gcc/ada/ * exp_put_image.adb (Build_Image_Call): Call Set_Uses_Sec_Stack on the current scope. We don't do this at all call sites, because there are three; better to do it here. Tested on x86_64-pc-linux-gnu, committed on master. --- gcc/ada/exp_put_image.adb | 8 ++++++++ 1 file changed, 8 insertions(+)