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-rw-r--r--src/backend/access/transam/multixact.c5
-rw-r--r--src/backend/access/transam/twophase.c9
2 files changed, 6 insertions, 8 deletions
diff --git a/src/backend/access/transam/multixact.c b/src/backend/access/transam/multixact.c
index b2cf770f9f7..f9ca0283e25 100644
--- a/src/backend/access/transam/multixact.c
+++ b/src/backend/access/transam/multixact.c
@@ -258,7 +258,7 @@ typedef struct MultiXactStateData
* stored in pg_control and used as truncation point for pg_multixact. At
* checkpoint or restartpoint, unneeded segments are removed.
*/
- MultiXactId perBackendXactIds[1]; /* VARIABLE LENGTH ARRAY */
+ MultiXactId perBackendXactIds[FLEXIBLE_ARRAY_MEMBER];
} MultiXactStateData;
/*
@@ -1744,8 +1744,9 @@ MultiXactShmemSize(void)
{
Size size;
+ /* We need 2*MaxOldestSlot + 1 perBackendXactIds[] entries */
#define SHARED_MULTIXACT_STATE_SIZE \
- add_size(sizeof(MultiXactStateData), \
+ add_size(offsetof(MultiXactStateData, perBackendXactIds) + sizeof(MultiXactId), \
mul_size(sizeof(MultiXactId) * 2, MaxOldestSlot))
size = SHARED_MULTIXACT_STATE_SIZE;
diff --git a/src/backend/access/transam/twophase.c b/src/backend/access/transam/twophase.c
index 6c7029edf0b..6edc22704cc 100644
--- a/src/backend/access/transam/twophase.c
+++ b/src/backend/access/transam/twophase.c
@@ -134,12 +134,9 @@ typedef struct TwoPhaseStateData
/* Number of valid prepXacts entries. */
int numPrepXacts;
- /*
- * There are max_prepared_xacts items in this array, but C wants a
- * fixed-size array.
- */
- GlobalTransaction prepXacts[1]; /* VARIABLE LENGTH ARRAY */
-} TwoPhaseStateData; /* VARIABLE LENGTH STRUCT */
+ /* There are max_prepared_xacts items in this array */
+ GlobalTransaction prepXacts[FLEXIBLE_ARRAY_MEMBER];
+} TwoPhaseStateData;
static TwoPhaseStateData *TwoPhaseState;