runtime: align first persistentalloc chunk as requested

ianlancetaylor · ianlancetaylor · commit c5babcc48523 · 2019-03-06T21:33:41.000Z
Change-Id: Ib391e019b1a7513d234fb1c8ff802efe8fa7c950 Reviewed-on: https://go-review.googlesource.com/c/go/+/163859 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Austin Clements <austin@google.com>
diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go
@@ -1248,7 +1248,7 @@ func persistentalloc1(size, align uintptr, sysStat *uint64) *notInHeap {
 				break
 			}
 		}
-		persistent.off = sys.PtrSize
+		persistent.off = round(sys.PtrSize, align)
 	}
 	p := persistent.base.add(persistent.off)
 	persistent.off += size

Original file line number	Diff line number	Diff line change
`@@ -1248,7 +1248,7 @@ func persistentalloc1(size, align uintptr, sysStat uint64) notInHeap {`
`1248`	`1248`	`break`
`1249`	`1249`	`}`
`1250`	`1250`	`}`
`1251`		`- persistent.off = sys.PtrSize`
	`1251`	`+ persistent.off = round(sys.PtrSize, align)`
`1252`	`1252`	`}`
`1253`	`1253`	`p := persistent.base.add(persistent.off)`
`1254`	`1254`	`persistent.off += size`