From: Cherry Zhang <cherryyz@google.com>
Date: Sun, 12 Jul 2020 21:15:35 +0000 (-0400)
Subject: [dev.link] cmd/compile: make GC map symbols content-addressable
X-Git-Tag: go1.16beta1~1378^2~52
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=17344d55d61b10f2145a95958ca2796846159dd0;p=gostls13.git

[dev.link] cmd/compile: make GC map symbols content-addressable

Change-Id: I20e5b580b3e0505473816fe7f277a74e13d33e64
Reviewed-on: https://go-review.googlesource.com/c/go/+/242080
Reviewed-by: Jeremy Faller <jeremy@golang.org>
---

diff --git a/src/cmd/compile/internal/gc/plive.go b/src/cmd/compile/internal/gc/plive.go
index 7e1c0c1a95..b366c8a4a0 100644
--- a/src/cmd/compile/internal/gc/plive.go
+++ b/src/cmd/compile/internal/gc/plive.go
@@ -1563,6 +1563,7 @@ func (lv *Liveness) emit() (argsSym, liveSym, regsSym *obj.LSym) {
 	makeSym := func(tmpSym *obj.LSym) *obj.LSym {
 		return Ctxt.LookupInit(fmt.Sprintf("gclocals·%x", md5.Sum(tmpSym.P)), func(lsym *obj.LSym) {
 			lsym.P = tmpSym.P
+			lsym.Set(obj.AttrContentAddressable, true)
 		})
 	}
 	if !go115ReduceLiveness {
diff --git a/src/cmd/compile/internal/gc/reflect.go b/src/cmd/compile/internal/gc/reflect.go
index f614b60685..05e64a5a9a 100644
--- a/src/cmd/compile/internal/gc/reflect.go
+++ b/src/cmd/compile/internal/gc/reflect.go
@@ -1715,6 +1715,7 @@ func dgcptrmask(t *types.Type) *obj.LSym {
 			duint8(lsym, i, x)
 		}
 		ggloblsym(lsym, int32(len(ptrmask)), obj.DUPOK|obj.RODATA|obj.LOCAL)
+		lsym.Set(obj.AttrContentAddressable, true)
 	}
 	return lsym
 }