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// run
//go:build !nacl && !js && !wasip1 && !android && gc
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"bytes"
"log"
"os/exec"
"runtime"
"strings"
)
func main() {
// The cannot open file error indicates that the parsing of -B flag
// succeeded and it failed at a later step.
checkLinkOutput("0", "-B argument must start with 0x")
checkLinkOutput("0x", "cannot open file nonexistent.o")
checkLinkOutput("0x0", "-B argument must have even number of digits")
checkLinkOutput("0x00", "cannot open file nonexistent.o")
checkLinkOutput("0xYZ", "-B argument contains invalid hex digit")
maxLen := 32
if runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
maxLen = 16
}
checkLinkOutput("0x"+strings.Repeat("00", maxLen), "cannot open file nonexistent.o")
checkLinkOutput("0x"+strings.Repeat("00", maxLen+1), "-B option too long")
}
func checkLinkOutput(buildid string, message string) {
cmd := exec.Command("go", "tool", "link", "-B", buildid, "nonexistent.o")
out, err := cmd.CombinedOutput()
if err == nil {
log.Fatalf("expected cmd/link to fail")
}
firstLine := string(bytes.SplitN(out, []byte("\n"), 2)[0])
if strings.HasPrefix(firstLine, "panic") {
log.Fatalf("cmd/link panicked:\n%s", out)
}
if !strings.Contains(firstLine, message) {
log.Fatalf("%s: cmd/link output did not include expected message %q: %s", buildid, message, firstLine)
}
}
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