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runtime: use unsafe.Slice in getStackMap

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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>
This commit is contained in:
Josh Bleecher Snyder 2021-09-28 17:42:05 -07:00
parent b8990ec932
commit a9d5ea650b
1 changed files with 2 additions and 1 deletions
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3
src/runtime/stack.go
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@ -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