1// run 2 3//go:build !nacl && !js && !wasip1 && !android && gc 4 5// Copyright 2016 The Go Authors. All rights reserved. 6// Use of this source code is governed by a BSD-style 7// license that can be found in the LICENSE file. 8 9package main 10 11import ( 12 "bytes" 13 "log" 14 "os/exec" 15 "runtime" 16 "strings" 17) 18 19func main() { 20 // The cannot open file error indicates that the parsing of -B flag 21 // succeeded and it failed at a later step. 22 checkLinkOutput("0", "-B argument must start with 0x") 23 checkLinkOutput("0x", "cannot open file nonexistent.o") 24 checkLinkOutput("0x0", "-B argument must have even number of digits") 25 checkLinkOutput("0x00", "cannot open file nonexistent.o") 26 checkLinkOutput("0xYZ", "-B argument contains invalid hex digit") 27 28 maxLen := 32 29 if runtime.GOOS == "darwin" || runtime.GOOS == "ios" { 30 maxLen = 16 31 } 32 checkLinkOutput("0x"+strings.Repeat("00", maxLen), "cannot open file nonexistent.o") 33 checkLinkOutput("0x"+strings.Repeat("00", maxLen+1), "-B option too long") 34} 35 36func checkLinkOutput(buildid string, message string) { 37 cmd := exec.Command("go", "tool", "link", "-B", buildid, "nonexistent.o") 38 out, err := cmd.CombinedOutput() 39 if err == nil { 40 log.Fatalf("expected cmd/link to fail") 41 } 42 43 firstLine := string(bytes.SplitN(out, []byte("\n"), 2)[0]) 44 if strings.HasPrefix(firstLine, "panic") { 45 log.Fatalf("cmd/link panicked:\n%s", out) 46 } 47 48 if !strings.Contains(firstLine, message) { 49 log.Fatalf("%s: cmd/link output did not include expected message %q: %s", buildid, message, firstLine) 50 } 51} 52