From fe3ee5741d42551e81a40de0b8220498d5c18aac Mon Sep 17 00:00:00 2001
From: Dmitriy Vyukov <dvyukov@google.com>
Date: Tue, 29 Jul 2014 22:06:20 +0400
Subject: [PATCH] runtime: verify hmap type size

LGTM=khr
R=golang-codereviews, khr
CC=golang-codereviews, khr
https://golang.org/cl/114510044
---
 src/pkg/runtime/hashmap.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/pkg/runtime/hashmap.go b/src/pkg/runtime/hashmap.go
index e15033797ca..68ad37c901b 100644
--- a/src/pkg/runtime/hashmap.go
+++ b/src/pkg/runtime/hashmap.go
@@ -153,8 +153,8 @@ func evacuated(b *bmap) bool {
 }
 
 func makemap(t *maptype, hint int64) *hmap {
-	if unsafe.Sizeof(hmap{}) > 48 {
-		gothrow("hmap too large")
+	if sz := unsafe.Sizeof(hmap{}); sz > 48 || sz != uintptr(t.hmap.size) {
+		gothrow("bad hmap size")
 	}
 
 	if hint < 0 || int64(int32(hint)) != hint {