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

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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>
This commit is contained in:
Than McIntosh 2019-12-26 13:39:04 -05:00
parent 9a5468edff
commit c6fea80b95
1 changed files with 15 additions and 0 deletions
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15
src/cmd/link/internal/loader/loader.go
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@ -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) {