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https://github.com/golang/go
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0bcdffeea6
Fixes #11656. Change-Id: Ib81d583e4b004e67dc9d2f898fd798112434e7a9 Reviewed-on: https://go-review.googlesource.com/12026 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Russ Cox <rsc@golang.org>
59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
// run
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// darwin/386 seems to mangle the PC and SP before
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// it manages to invoke the signal handler, so this test fails there.
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// +build !darwin !386
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//
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// openbsd/386 and plan9/386 don't work, not sure why.
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// +build !openbsd !386
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// +build !plan9 !386
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//
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// windows doesn't work, because Windows exception handling
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// delivers signals based on the current PC, and that current PC
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// doesn't go into the Go runtime.
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// +build !windows
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package main
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import (
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"runtime"
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"runtime/debug"
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"unsafe"
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)
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func main() {
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debug.SetPanicOnFault(true)
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defer func() {
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if err := recover(); err == nil {
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panic("not panicking")
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}
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pc, _, _, _ := runtime.Caller(10)
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f := runtime.FuncForPC(pc)
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if f == nil || f.Name() != "main.f" {
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if f == nil {
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println("no func for ", unsafe.Pointer(pc))
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} else {
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println("found func:", f.Name())
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}
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panic("cannot find main.f on stack")
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}
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}()
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f(20)
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}
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func f(n int) {
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if n > 0 {
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f(n-1)
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}
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var f struct {
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x uintptr
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}
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f.x = uintptr(unsafe.Pointer(&f))
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fn := *(*func())(unsafe.Pointer(&f))
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fn()
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}
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