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951143cf14
There is real (albeit generated) code that exceeds the limit. Fixes #33555 Change-Id: I668e85825d3d2a471970e869abe63f3492213cc1 Reviewed-on: https://go-review.googlesource.com/c/go/+/189697 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
82 lines
1.3 KiB
Go
82 lines
1.3 KiB
Go
// +build !nacl,!js
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// run
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// Copyright 2019 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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// Test that the linker permits long call sequences.
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package main
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"strconv"
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)
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const start = `
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package main
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func main() {
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println(f0() + 1)
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}
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`
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const fn = `
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//go:noinline
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func f%d() int {
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return f%d() + 1
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}`
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const fnlast = `
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//go:noinline
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func f%d() int {
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return 0
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}
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`
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const count = 400
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func main() {
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if err := test(); err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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}
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func test() error {
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var buf bytes.Buffer
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buf.WriteString(start)
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for i := 0; i < count; i++ {
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fmt.Fprintf(&buf, fn, i, i + 1)
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}
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fmt.Fprintf(&buf, fnlast, count)
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dir, err := ioutil.TempDir("", "issue33555")
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if err != nil {
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return err
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}
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defer os.RemoveAll(dir)
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fn := filepath.Join(dir, "x.go")
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if err := ioutil.WriteFile(fn, buf.Bytes(), 0644); err != nil {
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return err
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}
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out, err := exec.Command("go", "run", fn).CombinedOutput()
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if err != nil {
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return err
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}
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want := strconv.Itoa(count + 1)
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if got := string(bytes.TrimSpace(out)); got != want {
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return fmt.Errorf("got %q want %q", got, want)
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}
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return nil
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}
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