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[dev.link] cmd/internal/obj: sort ctxt.Data on AIX

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On AIX, TOC symbols may be created and added to ctxt.Data
concurrently. To ensure reproducible builds, sort ctxt.Data.
This implements the same logic as WriteObjFile does for old
object files.

Change-Id: I2e6e2d7755352848981544a4fb68b828a188c2ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/201021
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
This commit is contained in:
Cherry Zhang 2019-10-12 01:07:31 -04:00
parent d6535415fb
commit c9f633487b
1 changed files with 11 additions and 0 deletions
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11
src/cmd/internal/obj/sym.go
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@ -37,6 +37,7 @@ import (
"fmt"
"log"
"math"
"sort"
)
func Linknew(arch *LinkArch) *Link {
@ -167,6 +168,16 @@ func (ctxt *Link) NumberSyms(asm bool) {
return
}
if ctxt.Headtype == objabi.Haix {
// Data must be sorted to keep a constant order in TOC symbols.
// As they are created during Progedit, two symbols can be switched between
// two different compilations. Therefore, BuildID will be different.
// TODO: find a better place and optimize to only sort TOC symbols
sort.Slice(ctxt.Data, func(i, j int) bool {
return ctxt.Data[i].Name < ctxt.Data[j].Name
})
}
ctxt.pkgIdx = make(map[string]int32)
ctxt.defs = []*LSym{}
ctxt.nonpkgdefs = []*LSym{}