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[dev.regabi] cmd/compile: directly create go.map and go.track symbols

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These symbols are implementation details and don't correspond to Go
source symbols, so directly create them as linker symbols and get rid
of their pseudo packages.

Passes toolstash -cmp w/ -gcflags=all=-abiwrap.

Change-Id: I2e97374c21f3e909f6d350f15e7a5ed3574cadf4
Reviewed-on: https://go-review.googlesource.com/c/go/+/284372
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Matthew Dempsky 2021-01-17 02:53:18 -08:00
parent 4a4212c0e5
commit a2f825c542
4 changed files with 5 additions and 23 deletions
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7
src/cmd/compile/internal/gc/main.go
View File

@ -96,13 +96,6 @@ func Main(archInit func(*ssagen.ArchInfo)) {
ir.Pkgs.Itab = types.NewPkg("go.itab", "go.itab")
ir.Pkgs.Itab.Prefix = "go.itab" // not go%2eitab
ir.Pkgs.Track = types.NewPkg("go.track", "go.track")
ir.Pkgs.Track.Prefix = "go.track" // not go%2etrack
// pseudo-package used for map zero values
ir.Pkgs.Map = types.NewPkg("go.map", "go.map")
ir.Pkgs.Map.Prefix = "go.map"
// pseudo-package used for methods with anonymous receivers
ir.Pkgs.Go = types.NewPkg("go", "")

2
src/cmd/compile/internal/gc/obj.go
View File

@ -146,7 +146,7 @@ func dumpdata() {
dumpglobls(typecheck.Target.Externs[numExterns:])
if reflectdata.ZeroSize > 0 {
zero := ir.Pkgs.Map.Lookup("zero").Linksym()
zero := base.PkgLinksym("go.map", "zero", obj.ABI0)
objw.Global(zero, int32(reflectdata.ZeroSize), obj.DUPOK|obj.RODATA)
}

2
src/cmd/compile/internal/ir/symtab.go
View File

@ -67,8 +67,6 @@ var Syms struct {
var Pkgs struct {
Go *types.Pkg
Itab *types.Pkg
Map *types.Pkg
Runtime *types.Pkg
Track *types.Pkg
Unsafe *types.Pkg
}

17
src/cmd/compile/internal/reflectdata/reflect.go
View File

@ -791,7 +791,7 @@ func dcommontype(lsym *obj.LSym, t *types.Type) int {
// TrackSym returns the symbol for tracking use of field/method f, assumed
// to be a member of struct/interface type t.
func TrackSym(t *types.Type, f *types.Field) *obj.LSym {
return ir.Pkgs.Track.Lookup(t.ShortString() + "." + f.Sym.Name).Linksym()
return base.PkgLinksym("go.track", t.ShortString() + "." + f.Sym.Name, obj.ABI0)
}
func TypeSymPrefix(prefix string, t *types.Type) *types.Sym {
@ -1654,18 +1654,9 @@ func ZeroAddr(size int64) ir.Node {
if ZeroSize < size {
ZeroSize = size
}
s := ir.Pkgs.Map.Lookup("zero")
if s.Def == nil {
x := typecheck.NewName(s)
x.SetType(types.Types[types.TUINT8])
x.Class = ir.PEXTERN
x.SetTypecheck(1)
s.Def = x
}
z := typecheck.NodAddr(ir.AsNode(s.Def))
z.SetType(types.NewPtr(types.Types[types.TUINT8]))
z.SetTypecheck(1)
return z
lsym := base.PkgLinksym("go.map", "zero", obj.ABI0)
x := ir.NewLinksymExpr(base.Pos, lsym, types.Types[types.TUINT8])
return typecheck.Expr(typecheck.NodAddr(x))
}
func CollectPTabs() {