* [Ada] Memory leak in concatenation with Initialize_Scalars
@ 2020-11-26 8:41 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2020-11-26 8:41 UTC (permalink / raw)
To: gcc-patches; +Cc: Bob Duff
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This patch fixes a memory leak in concatenation when pragma
Initialize_Scalars or Normalize_Scalars is used.
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* exp_ch4.adb (Expand_Concatenate): Call Set_No_Initialization
on the N_Allocator node that is supposed to allocate on the
secondary stack.
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diff --git a/gcc/ada/exp_ch4.adb b/gcc/ada/exp_ch4.adb
--- a/gcc/ada/exp_ch4.adb
+++ b/gcc/ada/exp_ch4.adb
@@ -3505,8 +3505,17 @@ package body Exp_Ch4 is
Alloc :=
Make_Allocator (Loc,
Expression => New_Occurrence_Of (ConstrT, Loc));
+
+ -- Allocate on the secondary stack. This is currently done
+ -- only for type String, which normally doesn't have default
+ -- initialization, but we need to Set_No_Initialization in case
+ -- of Initialize_Scalars or Normalize_Scalars; otherwise, the
+ -- allocator will get transformed and will not use the secondary
+ -- stack.
+
Set_Storage_Pool (Alloc, RTE (RE_SS_Pool));
Set_Procedure_To_Call (Alloc, RTE (RE_SS_Allocate));
+ Set_No_Initialization (Alloc);
Temp := Make_Temporary (Loc, 'R', Alloc);
Insert_Action (Cnode,
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