// to represent common failure cases. Look for those functions in
			// the leaf position as a sign that the call stack and its
			// symbolization are more complex than this test can handle.
			//
			// TODO: Make the symbolization done by the execution tracer and CPU
			// profiler match up even in these harder cases. See #53378.
			switch leaf {

// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Tests stack symbolization.

//go:build ignore

package main

import (
	"log"
	"net"
	"os"
	"runtime"
	"runtime/trace"
	"sync"
	"time"
)

func main() {
	if err := trace.Start(os.Stdout); err != nil {
		log.Fatalf("failed to start tracing: %v", err)

	rw       lineReaderWriter
	base     uint64
}

type llvmSymbolizerJob struct {
	cmd *exec.Cmd
	in  io.WriteCloser
	out *bufio.Reader
	// llvm-symbolizer requires the symbol type, CODE or DATA, for symbolization.
	symType string
}

func (a *llvmSymbolizerJob) write(s string) error {
	_, err := fmt.Fprintln(a.in, a.symType, s)
	return err
}

func (a *llvmSymbolizerJob) readLine() (string, error) {