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cmd/compile: re-use Linksym lookup in dtypesym

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Change-Id: I1a5809f15c84f9d26064a567b45468fa56e6d5e9
Reviewed-on: https://go-review.googlesource.com/41408
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Josh Bleecher Snyder 2017-04-21 14:42:58 -07:00
parent 0d1e903c8a
commit 1dc3b60bd6
1 changed files with 62 additions and 63 deletions
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125
src/cmd/compile/internal/gc/reflect.go
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@ -1098,36 +1098,37 @@ func dtypesym(t *types.Type) *types.Sym {
ok:
ot := 0
lsym := s.Linksym()
switch t.Etype {
default:
ot = dcommontype(s.Linksym(), ot, t)
ot = dextratype(s.Linksym(), ot, t, 0)
ot = dcommontype(lsym, ot, t)
ot = dextratype(lsym, ot, t, 0)
case TARRAY:
// ../../../../runtime/type.go:/arrayType
s1 := dtypesym(t.Elem())
t2 := types.NewSlice(t.Elem())
s2 := dtypesym(t2)
ot = dcommontype(s.Linksym(), ot, t)
ot = dsymptr(s.Linksym(), ot, s1.Linksym(), 0)
ot = dsymptr(s.Linksym(), ot, s2.Linksym(), 0)
ot = duintptr(s.Linksym(), ot, uint64(t.NumElem()))
ot = dextratype(s.Linksym(), ot, t, 0)
ot = dcommontype(lsym, ot, t)
ot = dsymptr(lsym, ot, s1.Linksym(), 0)
ot = dsymptr(lsym, ot, s2.Linksym(), 0)
ot = duintptr(lsym, ot, uint64(t.NumElem()))
ot = dextratype(lsym, ot, t, 0)
case TSLICE:
// ../../../../runtime/type.go:/sliceType
s1 := dtypesym(t.Elem())
ot = dcommontype(s.Linksym(), ot, t)
ot = dsymptr(s.Linksym(), ot, s1.Linksym(), 0)
ot = dextratype(s.Linksym(), ot, t, 0)
ot = dcommontype(lsym, ot, t)
ot = dsymptr(lsym, ot, s1.Linksym(), 0)
ot = dextratype(lsym, ot, t, 0)
case TCHAN:
// ../../../../runtime/type.go:/chanType
s1 := dtypesym(t.Elem())
ot = dcommontype(s.Linksym(), ot, t)
ot = dsymptr(s.Linksym(), ot, s1.Linksym(), 0)
ot = duintptr(s.Linksym(), ot, uint64(t.ChanDir()))
ot = dextratype(s.Linksym(), ot, t, 0)
ot = dcommontype(lsym, ot, t)
ot = dsymptr(lsym, ot, s1.Linksym(), 0)
ot = duintptr(lsym, ot, uint64(t.ChanDir()))
ot = dextratype(lsym, ot, t, 0)
case TFUNC:
for _, t1 := range t.Recvs().Fields().Slice() {
@ -1142,30 +1143,30 @@ ok:
dtypesym(t1.Type)
}
ot = dcommontype(s.Linksym(), ot, t)
ot = dcommontype(lsym, ot, t)
inCount := t.Recvs().NumFields() + t.Params().NumFields()
outCount := t.Results().NumFields()
if isddd {
outCount |= 1 << 15
}
ot = duint16(s.Linksym(), ot, uint16(inCount))
ot = duint16(s.Linksym(), ot, uint16(outCount))
ot = duint16(lsym, ot, uint16(inCount))
ot = duint16(lsym, ot, uint16(outCount))
if Widthptr == 8 {
ot += 4 // align for *rtype
}
dataAdd := (inCount + t.Results().NumFields()) * Widthptr
ot = dextratype(s.Linksym(), ot, t, dataAdd)
ot = dextratype(lsym, ot, t, dataAdd)
// Array of rtype pointers follows funcType.
for _, t1 := range t.Recvs().Fields().Slice() {
ot = dsymptr(s.Linksym(), ot, dtypesym(t1.Type).Linksym(), 0)
ot = dsymptr(lsym, ot, dtypesym(t1.Type).Linksym(), 0)
}
for _, t1 := range t.Params().Fields().Slice() {
ot = dsymptr(s.Linksym(), ot, dtypesym(t1.Type).Linksym(), 0)
ot = dsymptr(lsym, ot, dtypesym(t1.Type).Linksym(), 0)
}
for _, t1 := range t.Results().Fields().Slice() {
ot = dsymptr(s.Linksym(), ot, dtypesym(t1.Type).Linksym(), 0)
ot = dsymptr(lsym, ot, dtypesym(t1.Type).Linksym(), 0)
}
case TINTER:
@ -1176,21 +1177,20 @@ ok:
}
// ../../../../runtime/type.go:/interfaceType
ot = dcommontype(s.Linksym(), ot, t)
ot = dcommontype(lsym, ot, t)
var tpkg *types.Pkg
if t.Sym != nil && t != types.Types[t.Etype] && t != types.Errortype {
tpkg = t.Sym.Pkg
}
ot = dgopkgpath(s.Linksym(), ot, tpkg)
ot = dgopkgpath(lsym, ot, tpkg)
ot = dsymptr(s.Linksym(), ot, s.Linksym(), ot+Widthptr+2*Widthint+uncommonSize(t))
ot = duintptr(s.Linksym(), ot, uint64(n))
ot = duintptr(s.Linksym(), ot, uint64(n))
ot = dsymptr(lsym, ot, lsym, ot+Widthptr+2*Widthint+uncommonSize(t))
ot = duintptr(lsym, ot, uint64(n))
ot = duintptr(lsym, ot, uint64(n))
dataAdd := imethodSize() * n
ot = dextratype(s.Linksym(), ot, t, dataAdd)
ot = dextratype(lsym, ot, t, dataAdd)
lsym := s.Linksym()
for _, a := range m {
// ../../../../runtime/type.go:/imethod
exported := exportname(a.name)
@ -1210,37 +1210,37 @@ ok:
s2 := dtypesym(t.Val())
s3 := dtypesym(mapbucket(t))
s4 := dtypesym(hmap(t))
ot = dcommontype(s.Linksym(), ot, t)
ot = dsymptr(s.Linksym(), ot, s1.Linksym(), 0)
ot = dsymptr(s.Linksym(), ot, s2.Linksym(), 0)
ot = dsymptr(s.Linksym(), ot, s3.Linksym(), 0)
ot = dsymptr(s.Linksym(), ot, s4.Linksym(), 0)
ot = dcommontype(lsym, ot, t)
ot = dsymptr(lsym, ot, s1.Linksym(), 0)
ot = dsymptr(lsym, ot, s2.Linksym(), 0)
ot = dsymptr(lsym, ot, s3.Linksym(), 0)
ot = dsymptr(lsym, ot, s4.Linksym(), 0)
if t.Key().Width > MAXKEYSIZE {
ot = duint8(s.Linksym(), ot, uint8(Widthptr))
ot = duint8(s.Linksym(), ot, 1) // indirect
ot = duint8(lsym, ot, uint8(Widthptr))
ot = duint8(lsym, ot, 1) // indirect
} else {
ot = duint8(s.Linksym(), ot, uint8(t.Key().Width))
ot = duint8(s.Linksym(), ot, 0) // not indirect
ot = duint8(lsym, ot, uint8(t.Key().Width))
ot = duint8(lsym, ot, 0) // not indirect
}
if t.Val().Width > MAXVALSIZE {
ot = duint8(s.Linksym(), ot, uint8(Widthptr))
ot = duint8(s.Linksym(), ot, 1) // indirect
ot = duint8(lsym, ot, uint8(Widthptr))
ot = duint8(lsym, ot, 1) // indirect
} else {
ot = duint8(s.Linksym(), ot, uint8(t.Val().Width))
ot = duint8(s.Linksym(), ot, 0) // not indirect
ot = duint8(lsym, ot, uint8(t.Val().Width))
ot = duint8(lsym, ot, 0) // not indirect
}
ot = duint16(s.Linksym(), ot, uint16(mapbucket(t).Width))
ot = duint8(s.Linksym(), ot, uint8(obj.Bool2int(isreflexive(t.Key()))))
ot = duint8(s.Linksym(), ot, uint8(obj.Bool2int(needkeyupdate(t.Key()))))
ot = dextratype(s.Linksym(), ot, t, 0)
ot = duint16(lsym, ot, uint16(mapbucket(t).Width))
ot = duint8(lsym, ot, uint8(obj.Bool2int(isreflexive(t.Key()))))
ot = duint8(lsym, ot, uint8(obj.Bool2int(needkeyupdate(t.Key()))))
ot = dextratype(lsym, ot, t, 0)
case TPTR32, TPTR64:
if t.Elem().Etype == TANY {
// ../../../../runtime/type.go:/UnsafePointerType
ot = dcommontype(s.Linksym(), ot, t)
ot = dextratype(s.Linksym(), ot, t, 0)
ot = dcommontype(lsym, ot, t)
ot = dextratype(lsym, ot, t, 0)
break
}
@ -1248,9 +1248,9 @@ ok:
// ../../../../runtime/type.go:/ptrType
s1 := dtypesym(t.Elem())
ot = dcommontype(s.Linksym(), ot, t)
ot = dsymptr(s.Linksym(), ot, s1.Linksym(), 0)
ot = dextratype(s.Linksym(), ot, t, 0)
ot = dcommontype(lsym, ot, t)
ot = dsymptr(lsym, ot, s1.Linksym(), 0)
ot = dextratype(lsym, ot, t, 0)
// ../../../../runtime/type.go:/structType
// for security, only the exported fields.
@ -1262,7 +1262,7 @@ ok:
n++
}
ot = dcommontype(s.Linksym(), ot, t)
ot = dcommontype(lsym, ot, t)
pkg := localpkg
if t.Sym != nil {
pkg = t.Sym.Pkg
@ -1276,18 +1276,18 @@ ok:
break
}
}
ot = dgopkgpath(s.Linksym(), ot, pkg)
ot = dsymptr(s.Linksym(), ot, s.Linksym(), ot+Widthptr+2*Widthint+uncommonSize(t))
ot = duintptr(s.Linksym(), ot, uint64(n))
ot = duintptr(s.Linksym(), ot, uint64(n))
ot = dgopkgpath(lsym, ot, pkg)
ot = dsymptr(lsym, ot, lsym, ot+Widthptr+2*Widthint+uncommonSize(t))
ot = duintptr(lsym, ot, uint64(n))
ot = duintptr(lsym, ot, uint64(n))
dataAdd := n * structfieldSize()
ot = dextratype(s.Linksym(), ot, t, dataAdd)
ot = dextratype(lsym, ot, t, dataAdd)
for _, f := range t.Fields().Slice() {
// ../../../../runtime/type.go:/structField
ot = dnameField(s.Linksym(), ot, pkg, f)
ot = dsymptr(s.Linksym(), ot, dtypesym(f.Type).Linksym(), 0)
ot = dnameField(lsym, ot, pkg, f)
ot = dsymptr(lsym, ot, dtypesym(f.Type).Linksym(), 0)
offsetAnon := uint64(f.Offset) << 1
if offsetAnon>>1 != uint64(f.Offset) {
Fatalf("%v: bad field offset for %s", t, f.Sym.Name)
@ -1295,12 +1295,12 @@ ok:
if f.Embedded != 0 {
offsetAnon |= 1
}
ot = duintptr(s.Linksym(), ot, offsetAnon)
ot = duintptr(lsym, ot, offsetAnon)
}
}
ot = dextratypeData(s.Linksym(), ot, t)
ggloblsym(s.Linksym(), int32(ot), int16(dupok|obj.RODATA))
ot = dextratypeData(lsym, ot, t)
ggloblsym(lsym, int32(ot), int16(dupok|obj.RODATA))
// The linker will leave a table of all the typelinks for
// types in the binary, so the runtime can find them.
@ -1319,8 +1319,7 @@ ok:
keep = true
}
}
// TODO(josharian): add lsym local variable above, use here instead of calling Linksym()
s.Linksym().Set(obj.AttrMakeTypelink, keep)
lsym.Set(obj.AttrMakeTypelink, keep)
return s
}