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cmd/link: collect itablinks as a slice in moduledata

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See #14874

This change tells the linker to collect all the itablink symbols and
collect them so that moduledata can have a slice of all compiler
generated itabs.

The logic is shamelessly adapted from what is done with typelink symbols.

Change-Id: Ie93b59acf0fcba908a876d506afbf796f222dbac
Reviewed-on: https://go-review.googlesource.com/20889
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Michel Lespinasse 2016-03-17 07:00:33 -07:00
parent f00bbd5f81
commit 79688ca58f
9 changed files with 52 additions and 5 deletions
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7
src/cmd/link/internal/ld/deadcode.go
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@ -107,10 +107,11 @@ func deadcode(ctxt *Link) {
}
if Buildmode != BuildmodeShared {
// Keep a typelink if the symbol it points at is being kept.
// (When BuildmodeShared, always keep typelinks.)
// Keep a typelink or itablink if the symbol it points at is being kept.
// (When BuildmodeShared, always keep typelinks and itablinks.)
for _, s := range ctxt.Allsym {
if strings.HasPrefix(s.Name, "go.typelink.") {
if strings.HasPrefix(s.Name, "go.typelink.") ||
strings.HasPrefix(s.Name, "go.itablink.") {
s.Attr.Set(AttrReachable, len(s.R) == 1 && s.R[0].Sym.Attr.Reachable())
}
}