issue14636.go

     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  
     9  package main
    10  
    11  import (
    12  	"bytes"
    13  	"log"
    14  	"os/exec"
    15  	"strings"
    16  )
    17  
    18  func main() {
    19  	checkLinkOutput("", "-B argument must start with 0x")
    20  	checkLinkOutput("0", "-B argument must start with 0x")
    21  	checkLinkOutput("0x", "usage")
    22  	checkLinkOutput("0x0", "-B argument must have even number of digits")
    23  	checkLinkOutput("0x00", "usage")
    24  	checkLinkOutput("0xYZ", "-B argument contains invalid hex digit")
    25  	checkLinkOutput("0x"+strings.Repeat("00", 32), "usage")
    26  	checkLinkOutput("0x"+strings.Repeat("00", 33), "-B option too long (max 32 digits)")
    27  }
    28  
    29  func checkLinkOutput(buildid string, message string) {
    30  	cmd := exec.Command("go", "tool", "link", "-B", buildid)
    31  	out, err := cmd.CombinedOutput()
    32  	if err == nil {
    33  		log.Fatalf("expected cmd/link to fail")
    34  	}
    35  
    36  	firstLine := string(bytes.SplitN(out, []byte("\n"), 2)[0])
    37  	if strings.HasPrefix(firstLine, "panic") {
    38  		log.Fatalf("cmd/link panicked:\n%s", out)
    39  	}
    40  
    41  	if !strings.Contains(firstLine, message) {
    42  		log.Fatalf("cmd/link output did not include expected message %q: %s", message, firstLine)
    43  	}
    44  }
    45
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