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|
package gocapturedrefrace
import (
"bytes"
"fmt"
"go/ast"
"go/printer"
"golang.org/x/tools/go/analysis"
)
var Analyzer = &analysis.Analyzer{
Name: "gocapturedrefrace",
Doc: "reports captured references in goroutine closures",
Run: run,
}
func run(pass *analysis.Pass) (interface{}, error) {
for _, file := range pass.Files {
ast.Inspect(
file,
func(node ast.Node) bool {
goStmt, ok := node.(*ast.GoStmt)
if !ok {
return true
}
var printedNode bytes.Buffer
err := printer.Fprint(&printedNode, pass.Fset, goStmt)
if err != nil {
panic(err)
}
fmt.Printf("%#v\n", goStmt)
// TODO: Get func literal of go statement
// TODO: Get variables in func literal
funcLit, ok := goStmt.Call.Fun.(*ast.FuncLit)
if !ok {
return true
}
checkClosure(pass, funcLit)
return true
},
)
}
return nil, nil
}
func checkClosure(pass *analysis.Pass, funcLit *ast.FuncLit) {
ast.Inspect(
funcLit,
func(node ast.Node) bool {
ident, ok := node.(*ast.Ident)
if !ok {
return true
}
if ident.Obj == nil {
return true
}
pass.Reportf(
ident.Pos(),
"variable found %q",
ident,
)
return true
},
)
}
|
