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  	"runtime"
    16  	"strings"
    17  )
    18  
    19  func 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  
    36  func 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
View as plain text