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cmd/link: avoid name collision with DWARF .def suffix
Adding a .def suffix for DWARF info collided with the DWARF info, without the suffix, for a method named def. Change the suffix to ..def instead. Fixes #15926. Change-Id: If1bf1bcb5dff1d7f7b79f78e3f7a3bbfcd2201bb Reviewed-on: https://go-review.googlesource.com/23733 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Crawshaw <crawshaw@golang.org>
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@ -529,7 +529,7 @@ func walktypedef(die *DWDie) *DWDie {
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}
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func walksymtypedef(s *LSym) *LSym {
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if t := Linkrlookup(Ctxt, s.Name+".def", int(s.Version)); t != nil {
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if t := Linkrlookup(Ctxt, s.Name+"..def", int(s.Version)); t != nil {
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return t
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}
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return s
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@ -819,7 +819,7 @@ func dotypedef(parent *DWDie, name string, def *DWDie) {
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Diag("dwarf: bad def in dotypedef")
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}
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def.sym = Linklookup(Ctxt, def.sym.Name+".def", 0)
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def.sym = Linklookup(Ctxt, def.sym.Name+"..def", 0)
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def.sym.Attr |= AttrHidden
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def.sym.Type = obj.SDWARFINFO
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@ -1021,7 +1021,7 @@ func newtype(gotype *LSym) *DWDie {
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}
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func nameFromDIESym(dwtype *LSym) string {
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return strings.TrimSuffix(dwtype.Name[len(infoprefix):], ".def")
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return strings.TrimSuffix(dwtype.Name[len(infoprefix):], "..def")
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}
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// Find or construct *T given T.
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20
test/fixedbugs/issue15926.go
Normal file
20
test/fixedbugs/issue15926.go
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@ -0,0 +1,20 @@
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// build
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Issue 15926: linker was adding .def to the end of symbols, causing
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// a name collision with a method actually named def.
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package main
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type S struct{}
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func (s S) def() {}
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var I = S.def
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func main() {
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I(S{})
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}
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