runtime: use unsafe.Slice in getStackMap

It's not less code, but it is clearer code.

Change-Id: I32239baf92487a56900a4edd8a2593014f37d093
Reviewed-on: https://go-review.googlesource.com/c/go/+/352953
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

diff --git a/src/runtime/stack.go b/src/runtime/stack.go
index 22fff73947d680d56a1ab833a37b1e04e72c173f..0946e6975a88649d84b654288ecc32d9970c911e 100644 (file)
--- a/src/runtime/stack.go
+++ b/src/runtime/stack.go
@@ -1327,7 +1327,8 @@ func getStackMap(frame *stkframe, cache *pcvalueCache, debug bool) (locals, args
                if p != nil {
                        n := *(*uintptr)(p)
                        p = add(p, goarch.PtrSize)
-                       *(*slice)(unsafe.Pointer(&objs)) = slice{array: noescape(p), len: int(n), cap: int(n)}
+                       r0 := (*stackObjectRecord)(noescape(p))
+                       objs = unsafe.Slice(r0, int(n))
                        // Note: the noescape above is needed to keep
                        // getStackMap from "leaking param content:
                        // frame".  That leak propagates up to getgcmask, then