offset := (signext24(r.Add()&0xffffff) + 2) * 4
			var tramp loader.Sym
			for i := 0; ; i++ {
				oName := ldr.SymName(rs)
				name := oName + fmt.Sprintf("%+d-tramp%d", offset, i)
				tramp = ldr.LookupOrCreateSym(name, int(ldr.SymVersion(rs)))
				ldr.SetAttrReachable(tramp, true)
				if ldr.SymType(tramp) == sym.SDYNIMPORT {
					// don't reuse trampoline defined in other module
					continue

		// a new trampoline.
		var tramp loader.Sym
		for i := 0; ; i++ {
			oName := ldr.SymName(rs)
			name := fmt.Sprintf("%s-tramp%d", oName, i)
			if r.Add() != 0 {
				name = fmt.Sprintf("%s%+x-tramp%d", oName, r.Add(), i)
			}
			tramp = ldr.LookupOrCreateSym(name, int(ldr.SymVersion(rs)))
			ldr.SetAttrReachable(tramp, true)
			if ldr.SymType(tramp) == sym.SDYNIMPORT {

					break
				}
			}
			if ldr.SymType(tramp) == 0 {
				// trampoline does not exist, create one
				trampb := ldr.MakeSymbolUpdater(tramp)
				ctxt.AddTramp(trampb)
				if ldr.SymType(rs) == sym.SDYNIMPORT {
					if r.Add() != 0 {
						ctxt.Errorf(s, "nonzero addend for DYNIMPORT call: %v+%d", ldr.SymName(rs), r.Add())
					}
					gentrampgot(ctxt, ldr, trampb, rs)
				} else {

//
// If two Stacks are equal then their Frames are guaranteed to be identical. If they are not
// equal, however, their Frames may still be equal.
type Stack struct {
	table *evTable
	id    stackID
}

// Frames is an iterator over the frames in a Stack.
func (s Stack) Frames(yield func(f StackFrame) bool) bool {
	if s.id == 0 {
		return true
	}

						break
					}
					i++
				}
				tb.frames = tb.frames[1:]
			}
			if !t.Failed() && len(tb.frames) > 0 {
				t.Errorf("got %d more frames than expected", len(tb.frames))
			}
			if t.Failed() {
				t.Logf("traceback diverged at frame %d", i)
				off := len(stack)
				if len(tb.frames) > 0 {
					off = tb.frames[0].off
				}
				t.Logf("traceback before error:\n%s", stack[:off])

The failure prints stack traces for all goroutines if there is no current goroutine
or the failure is internal to the run-time.
GOTRACEBACK=none omits the goroutine stack traces entirely.
GOTRACEBACK=single (the default) behaves as described above.
GOTRACEBACK=all adds stack traces for all user-created goroutines.
GOTRACEBACK=system is like “all” but adds stack frames for run-time functions

		"Drops functions above the highest matched frame.",
		"If set, all frames above the highest match are dropped from every sample.",
		"Matching includes the function name, filename or object name."),
	"tagroot": helpText(
		"Adds pseudo stack frames for labels key/value pairs at the callstack root.",
		"A comma-separated list of label keys.",
		"The first key creates frames at the new root."),
	"tagleaf": helpText(

// Package oldtrace implements a parser for Go execution traces from versions
// 1.11–1.21.
//
// The package started as a copy of Go 1.19's internal/trace, but has been
// optimized to be faster while using less memory and fewer allocations. It has
// been further modified for the specific purpose of converting traces to the
// new 1.22+ format.
package oldtrace

import (
	"bytes"
	"cmp"

func (d *pcDeck) tryAdd(pc uintptr, frames []runtime.Frame, symbolizeResult symbolizeFlag) (success bool) {
	if existing := len(d.frames); existing > 0 {
		// 'd.frames' are all expanded from one 'pc' and represent all
		// inlined functions so we check only the last one.
		newFrame := frames[0]
		last := d.frames[existing-1]
		if last.Func != nil { // the last frame can't be inlined. Flush.
			return false
		}

// pcBuf and dst should not overlap.
//
// fpunwindExpand checks if pcBuf contains logical frames (which include inlined
// frames) or physical frames (produced by frame pointer unwinding) using a
// sentinel value in pcBuf[0]. Logical frames are simply returned without the
// sentinel. Physical frames are turned into logical frames via inline unwinding
// and by applying the skip value that's stored in pcBuf[0].