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cmd/link: put symbol data types in new package

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For #22095

Change-Id: I07c288208d94dabae164c2ca0a067402a8e5c2e6
Reviewed-on: https://go-review.googlesource.com/68331
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
David Crawshaw 2017-10-04 17:54:04 -04:00
parent 24e4a128c9
commit 475d92ba4d
36 changed files with 1536 additions and 1457 deletions
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23
src/cmd/link/internal/ld/deadcode.go
View file

@ -7,6 +7,7 @@ package ld
import (
"cmd/internal/objabi"
"cmd/internal/sys"
"cmd/link/internal/sym"
"fmt"
"strings"
"unicode"
@ -112,13 +113,13 @@ func deadcode(ctxt *Link) {
// (When BuildmodeShared, always keep itablinks.)
for _, s := range ctxt.Syms.Allsym {
if strings.HasPrefix(s.Name, "go.itablink.") {
s.Attr.Set(AttrReachable, len(s.R) == 1 && s.R[0].Sym.Attr.Reachable())
s.Attr.Set(sym.AttrReachable, len(s.R) == 1 && s.R[0].Sym.Attr.Reachable())
}
}
}
// Remove dead text but keep file information (z symbols).
textp := make([]*Symbol, 0, len(ctxt.Textp))
textp := make([]*sym.Symbol, 0, len(ctxt.Textp))
for _, s := range ctxt.Textp {
if s.Attr.Reachable() {
textp = append(textp, s)
@ -132,11 +133,11 @@ func deadcode(ctxt *Link) {
// the reflect.method struct: mtyp, ifn, and tfn.
type methodref struct {
m methodsig
src *Symbol // receiver type symbol
r [3]*Reloc // R_METHODOFF relocations to fields of runtime.method
src *sym.Symbol // receiver type symbol
r [3]*sym.Reloc // R_METHODOFF relocations to fields of runtime.method
}
func (m methodref) ifn() *Symbol { return m.r[1].Sym }
func (m methodref) ifn() *sym.Symbol { return m.r[1].Sym }
func (m methodref) isExported() bool {
for _, r := range m.m {
@ -148,13 +149,13 @@ func (m methodref) isExported() bool {
// deadcodepass holds state for the deadcode flood fill.
type deadcodepass struct {
ctxt *Link
markQueue []*Symbol // symbols to flood fill in next pass
markQueue []*sym.Symbol // symbols to flood fill in next pass
ifaceMethod map[methodsig]bool // methods declared in reached interfaces
markableMethods []methodref // methods of reached types
reflectMethod bool
}
func (d *deadcodepass) cleanupReloc(r *Reloc) {
func (d *deadcodepass) cleanupReloc(r *sym.Reloc) {
if r.Sym.Attr.Reachable() {
r.Type = objabi.R_ADDROFF
} else {
@ -167,7 +168,7 @@ func (d *deadcodepass) cleanupReloc(r *Reloc) {
}
// mark appends a symbol to the mark queue for flood filling.
func (d *deadcodepass) mark(s, parent *Symbol) {
func (d *deadcodepass) mark(s, parent *sym.Symbol) {
if s == nil || s.Attr.Reachable() {
return
}
@ -181,7 +182,7 @@ func (d *deadcodepass) mark(s, parent *Symbol) {
}
fmt.Printf("%s -> %s\n", p, s.Name)
}
s.Attr |= AttrReachable
s.Attr |= sym.AttrReachable
s.Reachparent = parent
d.markQueue = append(d.markQueue, s)
}
@ -208,7 +209,7 @@ func (d *deadcodepass) init() {
// Mark all symbols defined in this library as reachable when
// building a shared library.
for _, s := range d.ctxt.Syms.Allsym {
if s.Type != 0 && s.Type != SDYNIMPORT {
if s.Type != 0 && s.Type != sym.SDYNIMPORT {
d.mark(s, nil)
}
}
@ -257,7 +258,7 @@ func (d *deadcodepass) flood() {
for len(d.markQueue) > 0 {
s := d.markQueue[0]
d.markQueue = d.markQueue[1:]
if s.Type == STEXT {
if s.Type == sym.STEXT {
if d.ctxt.Debugvlog > 1 {
d.ctxt.Logf("marktext %s\n", s.Name)
}