[dev.fuzz] all: merge master into dev.fuzz

Change-Id: I5d8c8329ccc9d747bd81ade6b1cb7cb8ae2e94b2

1 files changed, 22 insertions, 0 deletions

diff --git a/src/cmd/internal/objabi/path.go b/src/cmd/internal/objabi/path.go
index 2a42179a36..fd1c9981c6 100644
--- a/src/cmd/internal/objabi/path.go
+++ b/src/cmd/internal/objabi/path.go
@@ -39,3 +39,25 @@ func PathToPrefix(s string) string {
 
 	return string(p)
 }
+
+// IsRuntimePackagePath examines 'pkgpath' and returns TRUE if it
+// belongs to the collection of "runtime-related" packages, including
+// "runtime" itself, "reflect", "syscall", and the
+// "runtime/internal/*" packages. The compiler and/or assembler in
+// some cases need to be aware of when they are building such a
+// package, for example to enable features such as ABI selectors in
+// assembly sources.
+func IsRuntimePackagePath(pkgpath string) bool {
+	rval := false
+	switch pkgpath {
+	case "runtime":
+		rval = true
+	case "reflect":
+		rval = true
+	case "syscall":
+		rval = true
+	default:
+		rval = strings.HasPrefix(pkgpath, "runtime/internal")
+	}
+	return rval
+}