func (v *visitor) Visit(node ast.Node) ast.Visitor {
switch node := node.(type) {
case *ast.FuncDecl:
v.funcName = node.Name.Name
v.m = make(map[*ast.Object][]string)
case *ast.DeferStmt:
if sel, ok := node.Call.Fun.(*ast.SelectorExpr); ok {
if ident, ok := sel.X.(*ast.Ident); ok {
if selectors, ok := v.m[ident.Obj]; !ok {
v.m[ident.Obj] = []string{sel.Sel.Name}
} else {
found := false
for _, selname := range selectors {
if selname == sel.Sel.Name {
pos := v.fset.Position(node.Pos())
fmt.Printf("%s: %s:%d:%d: Repeating defer %s.%s() inside function %s\n",
v.pkgPath, pos.Filename, pos.Line, pos.Column,
ident.Name, selname, v.funcName)
found = true
exitStatus = 1
break
}
}
if !found {
v.m[ident.Obj] = append(selectors, sel.Sel.Name)
}
}
}
}
}
return v
}
// The variadic arguments may start with link and category types,
// and must end with a format string and any arguments.
func (f *file) errorf(n ast.Node, confidence float64, args ...interface{}) {
if confidence < f.config.MinConfidence {
return
}
p := f.fset.Position(n.Pos())
problem := Problem{
File: f.filename,
Position: p,
Confidence: confidence,
LineText: srcLine(f.src, p),
}
argLoop:
for len(args) > 1 { // always leave at least the format string in args
switch v := args[0].(type) {
case link:
problem.Link = string(v)
case category:
problem.Category = string(v)
default:
break argLoop
}
args = args[1:]
}
problem.Text = fmt.Sprintf(args[0].(string), args[1:]...)
f.problems = append(f.problems, problem)
}
func (f *File) printNode(node, ident ast.Node, url string) {
if !f.doPrint {
f.found = true
return
}
fmt.Printf("%s%s%s", url, f.sourcePos(f.fset.Position(ident.Pos())), f.docs(node))
}
func (lp *linePrinter) trim(n ast.Node) bool {
stmt, ok := n.(ast.Stmt)
if !ok {
return true
}
line := lp.fset.Position(n.Pos()).Line
if line != lp.line {
return false
}
switch stmt := stmt.(type) {
case *ast.IfStmt:
stmt.Body = lp.trimBlock(stmt.Body)
case *ast.SwitchStmt:
stmt.Body = lp.trimBlock(stmt.Body)
case *ast.TypeSwitchStmt:
stmt.Body = lp.trimBlock(stmt.Body)
case *ast.CaseClause:
stmt.Body = lp.trimList(stmt.Body)
case *ast.CommClause:
stmt.Body = lp.trimList(stmt.Body)
case *ast.BlockStmt:
stmt.List = lp.trimList(stmt.List)
}
return true
}
func (v *funcVisitor) Visit(n ast.Node) ast.Visitor {
switch n := n.(type) {
case *ast.FuncDecl:
// Function name is prepended with "T." if there is a receiver, where
// T is the type of the receiver, dereferenced if it is a pointer.
name := n.Name.Name
if n.Recv != nil {
field := n.Recv.List[0]
switch recv := field.Type.(type) {
case *ast.StarExpr:
name = recv.X.(*ast.Ident).Name + "." + name
case *ast.Ident:
name = recv.Name + "." + name
}
}
start, end := v.fset.Position(n.Pos()), v.fset.Position(n.End())
f := v.pkg.RegisterFunction(name, start.Filename, start.Offset, end.Offset)
v.state.functions = append(v.state.functions, f)
sv := &stmtVisitor{v.state}
if n.Body != nil {
sv.VisitStmt(n.Body)
}
// TODO function coverage (insert "function.Enter", "function.Leave").
// TODO come up with naming scheme for function literals.
// case *ast.FuncLit:
}
return v
}
func getSourceString(node ast.Node, fset *token.FileSet) string {
p1 := fset.Position(node.Pos())
p2 := fset.Position(node.End())
b := getFileBytes(p1.Filename)
return string(b[p1.Offset:p2.Offset])
}
// normalizeNodePos resets all position information of node and its descendants.
func normalizeNodePos(node ast.Node) {
ast.Inspect(node, func(node ast.Node) bool {
if node == nil {
return true
}
if node.Pos() == token.NoPos && node.End() == token.NoPos {
return true
}
pv := reflect.ValueOf(node)
if pv.Kind() != reflect.Ptr {
return true
}
v := pv.Elem()
if v.Kind() != reflect.Struct {
return true
}
for i := 0; i < v.NumField(); i++ {
f := v.Field(i)
ft := f.Type()
if f.CanSet() && ft.PkgPath() == "go/token" && ft.Name() == "Pos" && f.Int() != 0 {
f.SetInt(1)
}
}
return true
})
}
func posLink_urlFunc(node ast.Node, fset *token.FileSet) string {
var relpath string
var line int
var low, high int // selection
if p := node.Pos(); p.IsValid() {
pos := fset.Position(p)
relpath = pos.Filename
line = pos.Line
low = pos.Offset
}
if p := node.End(); p.IsValid() {
high = fset.Position(p).Offset
}
var buf bytes.Buffer
template.HTMLEscape(&buf, []byte(relpath))
// selection ranges are of form "s=low:high"
if low < high {
fmt.Fprintf(&buf, "?s=%d:%d", low, high) // no need for URL escaping
// if we have a selection, position the page
// such that the selection is a bit below the top
line -= 10
if line < 1 {
line = 1
}
}
// line id's in html-printed source are of the
// form "L%d" where %d stands for the line number
if line > 0 {
fmt.Fprintf(&buf, "#L%d", line) // no need for URL escaping
}
return buf.String()
}
// The variadic arguments may start with link and category types,
// and must end with a format string and any arguments.
// It returns the new Problem.
func (f *file) errorf(n ast.Node, confidence float64, args ...interface{}) *Problem {
pos := f.fset.Position(n.Pos())
if pos.Filename == "" {
pos.Filename = f.filename
}
return f.pkg.errorfAt(pos, confidence, args...)
}
/*
* findCalls() parses the node passed in and, if it's a
* SelectorExpr (which any call to a function/method will be)
* populates the map passed in as the second argument.
* This is the function used for finder.find().
*
* Functions will have the package as the X node,
* whereas methods will have the object identifier as the
* X. We do not differentiate in this function (there
* really isn't a good way without access to the list of
* imports and identifiers, so that has to be done higher up
* the stack).
*/
func findCalls(n ast.Node, f *finder) bool {
switch x := n.(type) {
case *ast.File:
locfields := strings.Split(fset.Position(n.Pos()).String(), ":")
f.currentFile = locfields[0]
case *ast.SelectorExpr:
switch y := x.X.(type) {
case *ast.Ident:
locfields := strings.Split(fset.Position(y.NamePos).String(), ":")
ln, err := strconv.Atoi(locfields[1])
if err != nil {
ln = -1
}
f.dset.AddPackageCall(Call{
Qual: y.Name,
Sel: x.Sel.Name,
// Location: y.NamePos,
Line: ln,
}, f.currentFile, true)
default:
return true
} // END switch y :=
default:
return true
} // END switch x :=
return true
}
// Used for implicit objects created by some ImportSpecs and CaseClauses.
func (r *resolver) defineImplicit(b *Block, n ast.Node, name string) {
obj := r.info.Implicits[n]
if obj == nil {
logf("%s: internal error: not an implicit definition: %T\n",
r.fset.Position(n.Pos()), n)
}
r.defineObject(b, name, obj)
}
func (f *gofile) newIssueRangeFromNode(n ast.Node) *issueRange {
s := f.Fset().Position(n.Pos())
e := f.Fset().Position(n.End())
return &issueRange{
s,
e,
}
}
func (a *stmtCompiler) definePkg(ident ast.Node, id, path string) *PkgIdent {
v, prev := a.block.DefinePackage(id, path, ident.Pos())
if prev != nil {
a.diagAt(ident.Pos(), "%s redeclared as imported package name\n\tprevious declaration at %s", id, a.fset.Position(prev.Pos()))
return nil
}
return v
}
func (f *file) errorf(n ast.Node, confidence float64, format string, a ...interface{}) {
p := f.fset.Position(n.Pos())
f.problems = append(f.problems, Problem{
Position: p,
Text: fmt.Sprintf(format, a...),
Confidence: confidence,
LineText: srcLine(f.src, p),
})
}
// Visit implements ast.Visistor's Visit method
func (t *prohibitVisitor) Visit(node ast.Node) ast.Visitor {
if node == nil {
return t
}
if filterChanStmtOrExpr(node) != nil {
t.AddError(node.Pos(), fmt.Sprintf("Channel operation in non top-level block: %v", node))
}
return t
}
func (v *annotationVisitor) addAnnoation(n ast.Node, packageName string, name string) {
pos := v.fset.Position(n.Pos())
end := v.fset.Position(n.End())
v.annotations = append(v.annotations, TypeAnnotation{
pos.Offset - len(packageWrapper),
end.Offset - len(packageWrapper),
packageName,
name})
}
// compiles expression or statement
func (w *World) compile(n ast.Node) Expr {
switch n := n.(type) {
case ast.Stmt:
return w.compileStmt(n)
case ast.Expr:
return w.compileExpr(n)
default:
panic(err(n.Pos(), "not allowed"))
}
}
func (vis *findNodeVisitor) Visit(node ast.Node) (w ast.Visitor) {
if node == nil || vis.result != nil {
return nil
}
if utils.ComparePosWithinFile(vis.stPos, vis.fset.Position(node.Pos())) == 0 &&
utils.ComparePosWithinFile(vis.endPos, vis.fset.Position(node.End())) == 0 {
vis.result = node
return nil
}
return vis
}
func nodeLabel(fset *token.FileSet, x ast.Node) string {
pos := fset.Position(x.Pos())
label := fmt.Sprintf("%T %s:%d", x, pos.Filename, pos.Line)
switch x := x.(type) {
case *ast.Ident:
label = x.Name + " " + label
case *ast.SelectorExpr:
label = "." + x.Sel.Name + " " + label
}
return label
}
func (f *file) indentOf(node ast.Node) string {
line := srcLine(f.src, f.fset.Position(node.Pos()))
for i, r := range line {
switch r {
case ' ', '\t':
default:
return line[:i]
}
}
return line // unusual or empty line
}
func (es *extractStrings) processBasicLit(basicLit *ast.BasicLit, n ast.Node, fset *token.FileSet) {
s, _ := strconv.Unquote(basicLit.Value)
if len(s) > 0 && basicLit.Kind == token.STRING && s != "\t" && s != "\n" && s != " " && !es.filter(s) { //TODO: fix to remove these: s != "\\t" && s != "\\n" && s != " "
position := fset.Position(n.Pos())
stringInfo := common.StringInfo{Value: s,
Filename: position.Filename,
Offset: position.Offset,
Line: position.Line,
Column: position.Column}
es.ExtractedStrings[s] = stringInfo
}
}
func (v *Visitor) Visit(node ast.Node) (w ast.Visitor) {
if node != nil {
fmt.Println(fset.Position(node.Pos()))
fmt.Println(fset.Position(node.End()))
fmt.Println(reflect.TypeOf(node))
if f := m[reflect.TypeOf(node)]; f != nil {
f(node)
}
}
return v
}
func (v *calltipVisitor) Visit(node ast.Node) (w ast.Visitor) {
if node != nil {
if x, ok := node.(*ast.CallExpr); ok {
a := v.fset.Position(node.Pos())
b := v.fset.Position(node.End())
if (a.IsValid() && v.offset >= a.Offset) && (!b.IsValid() || v.offset <= b.Offset) {
v.x = x
}
}
}
return v
}
func (file *WasmGoSourceFile) ErrorNode(node ast.Node, format string, a ...interface{}) error {
pos := node.Pos()
position := file.fset.File(pos).PositionFor(pos, false)
s := fmt.Sprintf(format, a...)
src := file.getSingleLineGoSource(node)
if src != "" {
s = fmt.Sprintf("%s (src: %s)", s, src)
}
e := &GoWasmError{
msg: fmt.Sprintf("%s @ %v", s, position),
}
return e
}
func (g *Grapher) NewRef(node ast.Node, obj types.Object) (*Ref, error) {
key, err := g.defKey(obj)
if err != nil {
return nil, err
}
pos := g.program.Fset.Position(node.Pos())
return &Ref{
File: pos.Filename,
Span: makeSpan(g.program.Fset, node),
Def: key,
}, nil
}
func (this DepthWalker) Visit(node ast.Node) ast.Visitor {
if node == nil {
return this + 1
}
buffer := ""
for i := 0; i < int(this); i++ {
buffer += " "
}
fmt.Printf("%sPos: %d %s\n", buffer, node.Pos(), AllSources.Position(node.Pos()))
fmt.Printf("%sEnd: %d %s\n", buffer, node.End(), AllSources.Position(node.End()))
fmt.Printf("%s%T\n", buffer, node)
fmt.Printf("%s%v\n", buffer, node)
if e, ok := node.(ast.Expr); ok {
obj, typ := types.ExprType(e, LocalImporter)
fmt.Printf("%s%v\n", buffer, obj)
fmt.Printf("%s%v\n", buffer, typ)
}
fmt.Println()
switch n := node.(type) {
}
return this + 1
}
func NewIssue(ctx *Context, node ast.Node, desc string, severity Score, confidence Score) *Issue {
var code string
fobj := ctx.FileSet.File(node.Pos())
name := fobj.Name()
line := fobj.Line(node.Pos())
if file, err := os.Open(fobj.Name()); err == nil {
defer file.Close()
s := (int64)(fobj.Position(node.Pos()).Offset) // Go bug, should be int64
e := (int64)(fobj.Position(node.End()).Offset) // Go bug, should be int64
code, err = codeSnippet(file, s, e, node)
if err != nil {
code = err.Error()
}
}
return &Issue{
File: name,
Line: line,
What: desc,
Confidence: confidence,
Severity: severity,
Code: code,
}
}
func (visitor *astNodeVisitorForMultipleStatements) Visit(node ast.Node) (w ast.Visitor) {
if node != nil {
if visitor.context.fset.Position(node.Pos()).Line == visitor.context.selection.Begin.Line &&
visitor.context.fset.Position(node.Pos()).Column == visitor.context.selection.Begin.Column &&
!visitor.context.shouldRecord {
// fmt.Println("Starting with node at pos", visitor.context.fset.Position(node.Pos()), "and end", visitor.context.fset.Position(node.End()))
// ast.Print(visitor.context.fset, node)
// fmt.Println(node.Pos(), node)
// fmt.Println("Parent")
// ast.Print(visitor.context.fset, visitor.parentNode)
visitor.context.posParent = visitor.parentNode
visitor.context.shouldRecord = true
}
if visitor.context.shouldRecord && visitor.context.posParent == visitor.parentNode {
visitor.context.nodesToExtract = append(visitor.context.nodesToExtract, node)
}
if visitor.context.fset.Position(node.End()).Line == visitor.context.selection.End.Line &&
visitor.context.fset.Position(node.End()).Column == visitor.context.selection.End.Column {
// fmt.Println("Ending with node at pos", visitor.context.fset.Position(node.Pos()), "and end", visitor.context.fset.Position(node.End()))
// ast.Print(visitor.context.fset, node)
// fmt.Println("Parent")
// ast.Print(visitor.context.fset, visitor.parentNode)
visitor.context.endParent = visitor.parentNode
visitor.context.shouldRecord = false
return nil
}
}
return &astNodeVisitorForMultipleStatements{
parentNode: node,
context: visitor.context,
}
}
// Span returns the 0-based offset range of the given AST node.
// The range is half-open, including the start position but excluding the end.
// If node == nil or lacks a valid start position, Span returns -1, -1.
// If the end position of node is invalid, start == end.
func (pi *PackageInfo) Span(node ast.Node) (start, end int) {
if node == nil {
return -1, -1
} else if pos := node.Pos(); pos == token.NoPos {
return -1, -1
} else {
start = pi.FileSet.Position(pos).Offset
end = start
}
if pos := node.End(); pos != token.NoPos {
end = pi.FileSet.Position(pos).Offset
}
return
}
func (v *annotationVisitor) addAnnotation(n ast.Node, packageName string, name string) {
pos := v.fset.Position(n.Pos())
end := v.fset.Position(n.End())
importPath := ""
if packageName != "" {
importPath = v.importPaths[packageName]
if importPath == "" {
return
}
}
v.annotations = append(v.annotations, TypeAnnotation{
pos.Offset - len(packageWrapper),
end.Offset - len(packageWrapper),
importPath,
name})
}