From fad6af03d7105f705b521b64fb7bbdfecf6d4adb Mon Sep 17 00:00:00 2001
From: Thomas Munro <thomas.munro@gmail.com>
Date: Tue, 4 Feb 2020 18:20:20 +1300
Subject: [PATCH 3/3] Inject random faults into dsm_create().

Testing patch, not for commit.
---
 src/backend/storage/ipc/dsm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/backend/storage/ipc/dsm.c b/src/backend/storage/ipc/dsm.c
index ef64d08357..6220acc79d 100644
--- a/src/backend/storage/ipc/dsm.c
+++ b/src/backend/storage/ipc/dsm.c
@@ -463,6 +463,13 @@ dsm_create(Size size, int flags)
 	nitems = dsm_control->nitems;
 	for (i = 0; i < nitems; ++i)
 	{
+		/* BEGIN HACK */
+		if (random() % 10 > 5)
+		{
+			nitems = dsm_control->maxitems;
+			break;
+		}
+		/* END HACK */
 		if (dsm_control->item[i].refcnt == 0)
 		{
 			dsm_control->item[i].handle = seg->handle;
-- 
2.23.0