continue
			}
			s.UI.PrintErr("ignoring unrecognized symbolization option: " + mode)
			s.UI.PrintErr("expecting -symbolize=[local|fastlocal|remote|none][:force][:demangle=[none|full|templates|default]")
		}
	}

	var err error
	if local {
		// Symbolize locally using binutils.
		if err = localSymbolize(p, fast, force, s.Obj, s.UI); err != nil {
			s.UI.PrintErr("local symbolization: " + err.Error())
		}
	}
	if remote {

	"      none                  Do not attempt symbolization\n" +
	"      local                 Examine only local binaries\n" +
	"      fastlocal             Only get function names from local binaries\n" +
	"      remote                Do not examine local binaries\n" +
	"      force                 Force re-symbolization\n" +
	"    Binary                  Local path or build id of binary for symbolization\n"

var usageMsgVars = "\n\n" +

			// 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 {

		if key == "" {
			// If there is no build id or source file, use the source as the
			// mapping file. This will enable remote symbolization for this
			// mapping, in particular for Go profiles on the legacy format.
			// The source is reset back to empty string by unsourceMapping
			// which is called after symbolization is finished.
			m.File = source
			key = source
		}
		ms[key] = append(ms[key], src)
	}
	return ms
}

// 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)

// and returns the symbolz output in a string. If force is false, it will only
// symbolize locations from mappings not already marked as HasFunctions. Never
// attempts symbolization of addresses from unsymbolizable system
// mappings as those may look negative - e.g. "[vsyscall]".

	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) {

	funcs symbolizeFlag
	fake  bool // map entry was faked; /proc/self/maps wasn't available
}

// symbolizeFlag keeps track of symbolization result.
//
//	0                  : no symbol lookup was performed
//	1<<0 (lookupTried) : symbol lookup was performed
//	1<<1 (lookupFailed): symbol lookup was performed but failed
type symbolizeFlag uint8

const (

			}

			for _, m := range prof.Mapping {
				if miss[m] && m.HasFunctions {
					t.Errorf("mapping %+v has HasFunctions=true, but contains locations with failed symbolization", m)
					continue
				}
				if !miss[m] && hit[m] && !m.HasFunctions {
					t.Errorf("mapping %+v has HasFunctions=false, but all referenced locations from this lapping were symbolized successfully", m)
					continue

	addr2line           string
	addr2lineFound      bool
	nm                  string
	nmFound             bool
	objdump             string
	objdumpFound        bool
	isLLVMObjdump       bool

	// if fast, perform symbolization using nm (symbol names only),
	// instead of file-line detail from the slower addr2line.
	fast bool
}

// get returns the current representation for bu, initializing it if necessary.
func (bu *Binutils) get() *binrep {