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* [gcc(refs/users/aoliva/heads/testbase)] Fix memory corruption with vector and variant record
@ 2020-07-07 0:58 Alexandre Oliva
0 siblings, 0 replies; only message in thread
From: Alexandre Oliva @ 2020-07-07 0:58 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:d63fbcf80081d6fc6b746667fcacc8eb6e34f306
commit d63fbcf80081d6fc6b746667fcacc8eb6e34f306
Author: Eric Botcazou <ebotcazou@gcc.gnu.org>
Date: Tue Jun 23 18:33:28 2020 +0200
Fix memory corruption with vector and variant record
The problem is that Has_Constrained_Partial_View must be tested on the
base type of the designated type of an allocator.
gcc/ada/ChangeLog:
* gcc-interface/trans.c (gnat_to_gnu) <N_Allocator>: Minor tweaks.
Call Has_Constrained_Partial_View on base type of designated type.
Diff:
---
gcc/ada/gcc-interface/trans.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/gcc/ada/gcc-interface/trans.c b/gcc/ada/gcc-interface/trans.c
index c32bdb96a5e..f74e0e728c9 100644
--- a/gcc/ada/gcc-interface/trans.c
+++ b/gcc/ada/gcc-interface/trans.c
@@ -7154,9 +7154,8 @@ gnat_to_gnu (Node_Id gnat_node)
case N_Allocator:
{
- tree gnu_init = NULL_TREE;
- tree gnu_type;
- bool ignore_init_type = false;
+ tree gnu_type, gnu_init;
+ bool ignore_init_type;
gnat_temp = Expression (gnat_node);
@@ -7165,15 +7164,22 @@ gnat_to_gnu (Node_Id gnat_node)
contains both the type and an initial value for the object. */
if (Nkind (gnat_temp) == N_Identifier
|| Nkind (gnat_temp) == N_Expanded_Name)
- gnu_type = gnat_to_gnu_type (Entity (gnat_temp));
+ {
+ ignore_init_type = false;
+ gnu_init = NULL_TREE;
+ gnu_type = gnat_to_gnu_type (Entity (gnat_temp));
+ }
+
else if (Nkind (gnat_temp) == N_Qualified_Expression)
{
const Entity_Id gnat_desig_type
= Designated_Type (Underlying_Type (Etype (gnat_node)));
- ignore_init_type = Has_Constrained_Partial_View (gnat_desig_type);
- gnu_init = gnat_to_gnu (Expression (gnat_temp));
+ /* The flag is effectively only set on the base types. */
+ ignore_init_type
+ = Has_Constrained_Partial_View (Base_Type (gnat_desig_type));
+ gnu_init = gnat_to_gnu (Expression (gnat_temp));
gnu_init = maybe_unconstrained_array (gnu_init);
gigi_checking_assert (!Do_Range_Check (Expression (gnat_temp)));
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2020-07-07 0:58 [gcc(refs/users/aoliva/heads/testbase)] Fix memory corruption with vector and variant record Alexandre Oliva
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