// lookup returns the address of the named variable identified by obj
// that is local to function f or one of its enclosing functions.
// If escaping, the reference comes from a potentially escaping pointer
// expression and the referent must be heap-allocated.
//
func (f *Function) lookup(obj types.Object, escaping bool) Value {
if v, ok := f.objects[obj]; ok {
if alloc, ok := v.(*Alloc); ok && escaping {
alloc.Heap = true
}
return v // function-local var (address)
}
// Definition must be in an enclosing function;
// plumb it through intervening closures.
if f.parent == nil {
panic("no ssa.Value for " + obj.String())
}
outer := f.parent.lookup(obj, true) // escaping
v := &FreeVar{
name: obj.Name(),
typ: outer.Type(),
pos: outer.Pos(),
outer: outer,
parent: f,
}
f.objects[obj] = v
f.FreeVars = append(f.FreeVars, v)
return v
}
func simpleObjInfo(obj types.Object) string {
pkg := obj.Pkg()
s := simpleType(obj.String())
if pkg != nil && pkg.Name() == "main" {
return strings.Replace(s, simpleType(pkg.Path())+".", "", -1)
}
return s
}
// memberFromObject populates package pkg with a member for the
// typechecker object obj.
//
// For objects from Go source code, syntax is the associated syntax
// tree (for funcs and vars only); it will be used during the build
// phase.
//
func memberFromObject(pkg *Package, obj types.Object, syntax ast.Node) {
name := obj.Name()
switch obj := obj.(type) {
case *types.TypeName:
pkg.Members[name] = &Type{
object: obj,
pkg: pkg,
}
case *types.Const:
c := &NamedConst{
object: obj,
Value: NewConst(obj.Val(), obj.Type()),
pkg: pkg,
}
pkg.values[obj] = c.Value
pkg.Members[name] = c
case *types.Var:
g := &Global{
Pkg: pkg,
name: name,
object: obj,
typ: types.NewPointer(obj.Type()), // address
pos: obj.Pos(),
}
pkg.values[obj] = g
pkg.Members[name] = g
case *types.Func:
sig := obj.Type().(*types.Signature)
if sig.Recv() == nil && name == "init" {
pkg.ninit++
name = fmt.Sprintf("init#%d", pkg.ninit)
}
fn := &Function{
name: name,
object: obj,
Signature: sig,
syntax: syntax,
pos: obj.Pos(),
Pkg: pkg,
Prog: pkg.Prog,
}
if syntax == nil {
fn.Synthetic = "loaded from gc object file"
}
pkg.values[obj] = fn
if sig.Recv() == nil {
pkg.Members[name] = fn // package-level function
}
default: // (incl. *types.Package)
panic("unexpected Object type: " + obj.String())
}
}
func printObject(u *unexporter.Unexporter, o types.Object) {
var objName string
if simpleNamesFlag {
objName = o.Name()
} else {
objName = o.String()
}
if showFilename {
pos := u.PositionForObject(o)
fmt.Printf("%s:%d:%d: %s\n", pos.Filename, pos.Line, pos.Column, objName)
} else {
fmt.Println(objName)
}
}
func IsSameObject(a, b types.Object) bool {
if a == b {
return true
}
if a == nil || b == nil {
return false
}
var apath string
var bpath string
if a.Pkg() != nil {
apath = a.Pkg().Path()
}
if b.Pkg() != nil {
bpath = b.Pkg().Path()
}
if apath != bpath {
return false
}
if a.Id() != b.Id() {
return false
}
return a.String() == b.String()
}
func (g *Grapher) path(obj types.Object) (path []string) {
if path, present := g.paths[obj]; present {
return path
}
var scope *types.Scope
pkgInfo, astPath, _ := g.program.PathEnclosingInterval(obj.Pos(), obj.Pos())
if astPath != nil {
for _, node := range astPath {
if s, hasScope := pkgInfo.Scopes[node]; hasScope {
scope = s
}
}
}
if scope == nil {
scope = obj.Parent()
}
if scope == nil {
// TODO(sqs): make this actually handle cases like the one described in
// https://github.com/sourcegraph/sourcegraph.com/issues/218
log.Printf("Warning: no scope for object %s at pos %s", obj.String(), g.program.Fset.Position(obj.Pos()))
return nil
}
prefix, hasPath := g.scopePaths[scope]
if !hasPath {
panic("no scope path for scope " + scope.String())
}
path = append([]string{}, prefix...)
p := g.program.Fset.Position(obj.Pos())
path = append(path, obj.Name()+uniqID(p))
return path
panic("no scope node for object " + obj.String())
}
func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
var cursorObj types.Object
var cursorSelection *types.Selection
var cursorObjIsDef bool
//lookup defs
var pkg *types.Package
var pkgInfo *types.Info
if cursor.xtest {
pkgInfo = conf.XInfo
pkg = conf.XPkg
} else {
pkgInfo = conf.Info
pkg = conf.Pkg
}
_ = cursorObjIsDef
if cursorObj == nil {
for sel, obj := range pkgInfo.Selections {
if cursor.pos >= sel.Sel.Pos() && cursor.pos <= sel.Sel.End() {
cursorObj = obj.Obj()
cursorSelection = obj
break
}
}
}
if cursorObj == nil {
for id, obj := range pkgInfo.Defs {
if cursor.pos >= id.Pos() && cursor.pos <= id.End() {
cursorObj = obj
cursorObjIsDef = true
break
}
}
}
_ = cursorSelection
if cursorObj == nil {
for id, obj := range pkgInfo.Uses {
if cursor.pos >= id.Pos() && cursor.pos <= id.End() {
cursorObj = obj
break
}
}
}
if cursorObj == nil {
return
}
kind, err := parserObjKind(cursorObj)
if err != nil {
log.Fatalln(err)
}
if kind == ObjField {
if cursorObj.(*types.Var).Anonymous() {
typ := orgType(cursorObj.Type())
if named, ok := typ.(*types.Named); ok {
cursorObj = named.Obj()
}
}
}
cursorPkg := cursorObj.Pkg()
cursorPos := cursorObj.Pos()
//var fieldTypeInfo *types.Info
var fieldTypeObj types.Object
// if cursorPkg == pkg {
// fieldTypeInfo = pkgInfo
// }
cursorIsInterfaceMethod := false
var cursorInterfaceTypeName string
if kind == ObjMethod && cursorSelection != nil && cursorSelection.Recv() != nil {
sig := cursorObj.(*types.Func).Type().Underlying().(*types.Signature)
if _, ok := sig.Recv().Type().Underlying().(*types.Interface); ok {
if named, ok := cursorSelection.Recv().(*types.Named); ok {
obj, typ := w.lookupNamedMethod(named, cursorObj.Name())
if obj != nil {
cursorObj = obj
}
if typ != nil {
cursorPkg = typ.Obj().Pkg()
cursorInterfaceTypeName = typ.Obj().Name()
}
cursorIsInterfaceMethod = true
}
}
} else if kind == ObjField && cursorSelection != nil {
if recv := cursorSelection.Recv(); recv != nil {
typ := orgType(recv)
if typ != nil {
if name, ok := typ.(*types.Named); ok {
fieldTypeObj = name.Obj()
na := w.lookupNamedField(name, cursorObj.Name())
if na != nil {
fieldTypeObj = na.Obj()
}
}
}
}
}
if cursorPkg != nil && cursorPkg != pkg &&
kind != ObjPkgName && w.isBinaryPkg(cursorPkg.Path()) {
conf := &PkgConfig{
IgnoreFuncBodies: true,
AllowBinary: true,
WithTestFiles: true,
Info: &types.Info{
Defs: make(map[*ast.Ident]types.Object),
},
}
pkg, _ := w.Import("", cursorPkg.Path(), conf)
if pkg != nil {
if cursorIsInterfaceMethod {
for _, obj := range conf.Info.Defs {
if obj == nil {
continue
}
if fn, ok := obj.(*types.Func); ok {
if fn.Name() == cursorObj.Name() {
if sig, ok := fn.Type().Underlying().(*types.Signature); ok {
if named, ok := sig.Recv().Type().(*types.Named); ok {
if named.Obj() != nil && named.Obj().Name() == cursorInterfaceTypeName {
cursorPos = obj.Pos()
break
}
}
}
}
}
}
} else if kind == ObjField && fieldTypeObj != nil {
for _, obj := range conf.Info.Defs {
if obj == nil {
continue
}
if _, ok := obj.(*types.TypeName); ok {
if IsSameObject(fieldTypeObj, obj) {
if t, ok := obj.Type().Underlying().(*types.Struct); ok {
for i := 0; i < t.NumFields(); i++ {
if t.Field(i).Id() == cursorObj.Id() {
cursorPos = t.Field(i).Pos()
break
}
}
}
break
}
}
}
} else {
for k, v := range conf.Info.Defs {
if k != nil && v != nil && IsSameObject(v, cursorObj) {
cursorPos = k.Pos()
break
}
}
}
}
// if kind == ObjField || cursorIsInterfaceMethod {
// fieldTypeInfo = conf.Info
// }
}
// if kind == ObjField {
// fieldTypeObj = w.LookupStructFromField(fieldTypeInfo, cursorPkg, cursorObj, cursorPos)
// }
if typesFindDef {
fmt.Println(w.fset.Position(cursorPos))
}
if typesFindInfo {
if kind == ObjField && fieldTypeObj != nil {
typeName := fieldTypeObj.Name()
if fieldTypeObj.Pkg() != nil && fieldTypeObj.Pkg() != pkg {
typeName = fieldTypeObj.Pkg().Name() + "." + fieldTypeObj.Name()
}
fmt.Println(typeName, simpleObjInfo(cursorObj))
} else if kind == ObjBuiltin {
fmt.Println(builtinInfo(cursorObj.Name()))
} else if kind == ObjPkgName {
fmt.Println(cursorObj.String())
} else if cursorIsInterfaceMethod {
fmt.Println(strings.Replace(simpleObjInfo(cursorObj), "(interface)", cursorPkg.Name()+"."+cursorInterfaceTypeName, 1))
} else {
fmt.Println(simpleObjInfo(cursorObj))
}
}
if typesFindDoc && typesFindDef {
pos := w.fset.Position(cursorPos)
file := w.parsedFileCache[pos.Filename]
if file != nil {
line := pos.Line
var group *ast.CommentGroup
for _, v := range file.Comments {
lastLine := w.fset.Position(v.End()).Line
if lastLine == line || lastLine == line-1 {
group = v
} else if lastLine > line {
break
}
}
if group != nil {
fmt.Println(group.Text())
}
}
}
if !typesFindUse {
return
}
var usages []int
if kind == ObjPkgName {
for id, obj := range pkgInfo.Uses {
if obj != nil && obj.Id() == cursorObj.Id() { //!= nil && cursorObj.Pos() == obj.Pos() {
usages = append(usages, int(id.Pos()))
}
}
} else {
// for id, obj := range pkgInfo.Defs {
// if obj == cursorObj { //!= nil && cursorObj.Pos() == obj.Pos() {
// usages = append(usages, int(id.Pos()))
// }
// }
for id, obj := range pkgInfo.Uses {
if obj == cursorObj { //!= nil && cursorObj.Pos() == obj.Pos() {
usages = append(usages, int(id.Pos()))
}
}
}
var pkg_path string
var xpkg_path string
if conf.Pkg != nil {
pkg_path = conf.Pkg.Path()
}
if conf.XPkg != nil {
xpkg_path = conf.XPkg.Path()
}
if cursorPkg != nil &&
(cursorPkg.Path() == pkg_path || cursorPkg.Path() == xpkg_path) &&
kind != ObjPkgName {
usages = append(usages, int(cursorPos))
}
(sort.IntSlice(usages)).Sort()
for _, pos := range usages {
fmt.Println(w.fset.Position(token.Pos(pos)))
}
//check look for current pkg.object on pkg_test
if typesFindUseAll || IsSamePkg(cursorPkg, conf.Pkg) {
var addInfo *types.Info
if conf.Cursor.xtest {
addInfo = conf.Info
} else {
addInfo = conf.XInfo
}
if addInfo != nil && cursorPkg != nil {
var usages []int
// for id, obj := range addInfo.Defs {
// if id != nil && obj != nil && obj.Id() == cursorObj.Id() {
// usages = append(usages, int(id.Pos()))
// }
// }
for k, v := range addInfo.Uses {
if k != nil && v != nil && IsSameObject(v, cursorObj) {
usages = append(usages, int(k.Pos()))
}
}
(sort.IntSlice(usages)).Sort()
for _, pos := range usages {
fmt.Println(w.fset.Position(token.Pos(pos)))
}
}
}
if !typesFindUseAll {
return
}
if cursorPkg == nil {
return
}
var find_def_pkg string
var uses_paths []string
if cursorPkg.Path() != pkg_path && cursorPkg.Path() != xpkg_path {
find_def_pkg = cursorPkg.Path()
uses_paths = append(uses_paths, cursorPkg.Path())
}
buildutil.ForEachPackage(&build.Default, func(importPath string, err error) {
if err != nil {
return
}
if importPath == conf.Pkg.Path() {
return
}
bp, err := w.importPath(importPath, 0)
if err != nil {
return
}
find := false
if bp.ImportPath == cursorPkg.Path() {
find = true
} else {
for _, v := range bp.Imports {
if v == cursorObj.Pkg().Path() {
find = true
break
}
}
}
if find {
for _, v := range uses_paths {
if v == bp.ImportPath {
return
}
}
uses_paths = append(uses_paths, bp.ImportPath)
}
})
w.imported = make(map[string]*types.Package)
for _, v := range uses_paths {
conf := &PkgConfig{
IgnoreFuncBodies: false,
AllowBinary: true,
WithTestFiles: true,
Info: &types.Info{
Uses: make(map[*ast.Ident]types.Object),
},
XInfo: &types.Info{
Uses: make(map[*ast.Ident]types.Object),
},
}
w.imported[v] = nil
var usages []int
vpkg, _ := w.Import("", v, conf)
if vpkg != nil && vpkg != pkg {
if conf.Info != nil {
for k, v := range conf.Info.Uses {
if k != nil && v != nil && IsSameObject(v, cursorObj) {
usages = append(usages, int(k.Pos()))
}
}
}
if conf.XInfo != nil {
for k, v := range conf.XInfo.Uses {
if k != nil && v != nil && IsSameObject(v, cursorObj) {
usages = append(usages, int(k.Pos()))
}
}
}
}
if v == find_def_pkg {
usages = append(usages, int(cursorPos))
}
(sort.IntSlice(usages)).Sort()
for _, pos := range usages {
fmt.Println(w.fset.Position(token.Pos(pos)))
}
}
}
func (w *PkgWalker) LookupObjects(pkg *types.Package, pkgInfo *types.Info, cursor *FileCursor) {
var cursorObj types.Object
var cursorSelection *types.Selection
var cursorObjIsDef bool
//lookup defs
_ = cursorObjIsDef
if cursorObj == nil {
for sel, obj := range pkgInfo.Selections {
if cursor.pos >= sel.Sel.Pos() && cursor.pos <= sel.Sel.End() {
cursorObj = obj.Obj()
cursorSelection = obj
break
}
}
}
if cursorObj == nil {
for id, obj := range pkgInfo.Defs {
if cursor.pos >= id.Pos() && cursor.pos <= id.End() {
cursorObj = obj
cursorObjIsDef = true
break
}
}
}
_ = cursorSelection
if cursorObj == nil {
for id, obj := range pkgInfo.Uses {
if cursor.pos >= id.Pos() && cursor.pos <= id.End() {
cursorObj = obj
break
}
}
}
if cursorObj == nil {
return
}
kind, err := parserObjKind(cursorObj)
if err != nil {
log.Fatalln(err)
}
if kind == ObjField {
if cursorObj.(*types.Var).Anonymous() {
if named, ok := cursorObj.Type().(*types.Named); ok {
cursorObj = named.Obj()
}
}
}
cursorPkg := cursorObj.Pkg()
cursorPos := cursorObj.Pos()
var fieldTypeInfo *types.Info
var fieldTypeObj types.Object
if cursorPkg == pkg {
fieldTypeInfo = pkgInfo
}
cursorIsInterfaceMethod := false
var cursorInterfaceTypeName string
if kind == ObjMethod && cursorSelection != nil && cursorSelection.Recv() != nil {
sig := cursorObj.(*types.Func).Type().Underlying().(*types.Signature)
if _, ok := sig.Recv().Type().Underlying().(*types.Interface); ok {
named := cursorSelection.Recv().(*types.Named)
obj, typ := w.lookupNamedMethod(named, cursorObj.Name())
if obj != nil {
cursorObj = obj
}
if typ != nil {
cursorPkg = typ.Obj().Pkg()
cursorInterfaceTypeName = typ.Obj().Name()
}
cursorIsInterfaceMethod = true
}
}
if cursorPkg != nil && cursorPkg != pkg &&
kind != ObjPkgName && w.isBinaryPkg(cursorPkg.Path()) {
conf := &PkgConfig{
IgnoreFuncBodies: true,
AllowBinary: true,
WithTestFiles: true,
Info: &types.Info{
Defs: make(map[*ast.Ident]types.Object),
},
}
pkg, _ := w.Import("", cursorPkg.Path(), conf)
if pkg != nil {
if cursorIsInterfaceMethod {
for _, obj := range conf.Info.Defs {
if obj == nil {
continue
}
if fn, ok := obj.(*types.Func); ok {
if fn.Name() == cursorObj.Name() {
if sig, ok := fn.Type().Underlying().(*types.Signature); ok {
if named, ok := sig.Recv().Type().(*types.Named); ok {
if named.Obj() != nil && named.Obj().Name() == cursorInterfaceTypeName {
cursorPos = obj.Pos()
break
}
}
}
}
}
}
} else {
for _, obj := range conf.Info.Defs {
if obj != nil && obj.String() == cursorObj.String() {
cursorPos = obj.Pos()
break
}
}
}
}
if kind == ObjField || cursorIsInterfaceMethod {
fieldTypeInfo = conf.Info
}
}
if kind == ObjField {
fieldTypeObj = w.LookupStructFromField(fieldTypeInfo, cursorPkg, cursorObj, cursorPos)
}
if typeFindDef {
fmt.Println(w.fset.Position(cursorPos))
}
if typeFindInfo {
if kind == ObjField && fieldTypeObj != nil {
typeName := fieldTypeObj.Name()
if fieldTypeObj.Pkg() != nil && fieldTypeObj.Pkg() != pkg {
typeName = fieldTypeObj.Pkg().Name() + "." + fieldTypeObj.Name()
}
fmt.Println(typeName, simpleType(cursorObj.String()))
} else if kind == ObjBuiltin {
fmt.Println(builtinInfo(cursorObj.Name()))
} else if kind == ObjPkgName {
fmt.Println(cursorObj.String())
} else if cursorIsInterfaceMethod {
fmt.Println(strings.Replace(simpleType(cursorObj.String()), "(interface)", cursorPkg.Name()+"."+cursorInterfaceTypeName, 1))
} else {
fmt.Println(simpleType(cursorObj.String()))
}
}
//if f, ok := w.parsedFileCache[w.fset.Position(cursorPos).Filename]; ok {
// for _, d := range f.Decls {
// if inRange(d, cursorPos) {
// if fd, ok := d.(*ast.FuncDecl); ok {
// fd.Body = nil
// }
// commentMap := ast.NewCommentMap(w.fset, f, f.Comments)
// commentedNode := printer.CommentedNode{Node: d}
// if comments := commentMap.Filter(d).Comments(); comments != nil {
// commentedNode.Comments = comments
// }
// var b bytes.Buffer
// printer.Fprint(&b, w.fset, &commentedNode)
// b.Write([]byte("\n\n")) // Add a blank line between entries if we print documentation.
// log.Println(w.nodeString(d))
// }
// }
//}
if !typeFindUse {
return
}
var usages []int
if kind == ObjPkgName {
for id, obj := range pkgInfo.Uses {
if obj != nil && obj.Id() == cursorObj.Id() { //!= nil && cursorObj.Pos() == obj.Pos() {
usages = append(usages, int(id.Pos()))
}
}
} else {
for id, obj := range pkgInfo.Defs {
if obj == cursorObj { //!= nil && cursorObj.Pos() == obj.Pos() {
usages = append(usages, int(id.Pos()))
}
}
for id, obj := range pkgInfo.Uses {
if obj == cursorObj { //!= nil && cursorObj.Pos() == obj.Pos() {
usages = append(usages, int(id.Pos()))
}
}
}
(sort.IntSlice(usages)).Sort()
for _, pos := range usages {
fmt.Println(w.fset.Position(token.Pos(pos)))
}
}