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Current Path: /opt/golang/1.22.0/src/runtime/testdata/testprog

opt / golang / 1.22.0 / src / runtime / testdata / testprog /

📁 ..
📄 abort.go(449 B)
📄 badtraceback.go(1.18 KB)
📄 checkptr.go(2.42 KB)
📄 crash.go(2.47 KB)
📄 crashdump.go(917 B)
📄 deadlock.go(6.5 KB)
📄 framepointer.go(839 B)
📄 framepointer_amd64.s(248 B)
📄 framepointer_arm64.s(249 B)
📄 gc.go(12.08 KB)
📄 lockosthread.go(6.54 KB)
📄 main.go(651 B)
📄 map.go(1.26 KB)
📄 memprof.go(869 B)
📄 misc.go(306 B)
📄 numcpu_freebsd.go(3.38 KB)
📄 panicprint.go(2.22 KB)
📄 panicrace.go(414 B)
📄 preempt.go(1.61 KB)
📄 segv.go(479 B)
📄 segv_linux.go(517 B)
📄 signal.go(861 B)
📄 sleep.go(378 B)
📄 stringconcat.go(443 B)
📄 syscall_windows.go(1.5 KB)
📄 syscalls.go(256 B)
📄 syscalls_linux.go(1.23 KB)
📄 syscalls_none.go(455 B)
📄 timeprof.go(813 B)
📄 traceback_ancestors.go(2.07 KB)
📄 unsafe.go(195 B)
📄 vdso.go(1005 B)

Editing: badtraceback.go

// Copyright 2018 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.

package main

import (
	"runtime"
	"runtime/debug"
	"unsafe"
)

func init() {
	register("BadTraceback", BadTraceback)
}

func BadTraceback() {
	// Disable GC to prevent traceback at unexpected time.
	debug.SetGCPercent(-1)
	// Out of an abundance of caution, also make sure that there are
	// no GCs actively in progress.
	runtime.GC()

// Run badLR1 on its own stack to minimize the stack size and
	// exercise the stack bounds logic in the hex dump.
	go badLR1()
	select {}
}

//go:noinline
func badLR1() {
	// We need two frames on LR machines because we'll smash this
	// frame's saved LR.
	badLR2(0)
}

//go:noinline
func badLR2(arg int) {
	// Smash the return PC or saved LR.
	lrOff := unsafe.Sizeof(uintptr(0))
	if runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le" {
		lrOff = 32 // FIXED_FRAME or sys.MinFrameSize
	}
	lrPtr := (*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(&arg)) - lrOff))
	*lrPtr = 0xbad

// Print a backtrace. This should include diagnostics for the
	// bad return PC and a hex dump.
	panic("backtrace")
}

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Editing: badtraceback.go

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