From: Than McIntosh <thanm@google.com>
Date: Thu, 26 Dec 2019 18:39:04 +0000 (-0500)
Subject: [dev.link] cmd/link: add SymVersion loader method
X-Git-Tag: go1.15beta1~679^2~164
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=c6fea80b9582d7c4f86bf88b404ac6ebb33359fd;p=gostls13.git

[dev.link] cmd/link: add SymVersion loader method

Add a loader method to retrieve the version from a loader.Sym
(useful mainly for debugging at the moment).

Change-Id: I82e0e316bb86eb41b9cf366e656a0f848cf3424e
Reviewed-on: https://go-review.googlesource.com/c/go/+/212617
Reviewed-by: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
---

diff --git a/src/cmd/link/internal/loader/loader.go b/src/cmd/link/internal/loader/loader.go
index f774c0c8dd..029e10feda 100644
--- a/src/cmd/link/internal/loader/loader.go
+++ b/src/cmd/link/internal/loader/loader.go
@@ -607,6 +607,21 @@ func (l *Loader) SymName(i Sym) string {
 	return strings.Replace(osym.Name, "\"\".", r.pkgprefix, -1)
 }
 
+// Returns the version of the i-th symbol.
+func (l *Loader) SymVersion(i Sym) int {
+	if l.IsExternal(i) {
+		if s := l.Syms[i]; s != nil {
+			return int(s.Version)
+		}
+		pp := l.getPayload(i)
+		return pp.ver
+	}
+	r, li := l.toLocal(i)
+	osym := goobj2.Sym{}
+	osym.Read(r.Reader, r.SymOff(li))
+	return int(abiToVer(osym.ABI, r.version))
+}
+
 // Returns the type of the i-th symbol.
 func (l *Loader) SymType(i Sym) sym.SymKind {
 	if l.IsExternal(i) {