1# Test to ensure runtime/debug.ReadBuildInfo parses
2# the modinfo embedded in a binary by the go tool
3# when module is enabled.
4env GO111MODULE=on
5
6cd x
7go mod edit -require=rsc.io/quote@v1.5.2
8go mod edit -replace=rsc.io/quote@v1.5.2=rsc.io/quote@v1.0.0
9go mod tidy # populate go.sum
10
11# Build a binary and ensure that it can output its own debug info.
12# The debug info should be accessible before main starts (golang.org/issue/29628).
13go build
14exec ./x$GOEXE
15stderr 'mod\s+x\s+\(devel\)'
16stderr 'dep\s+rsc.io/quote\s+v1.5.2\s+'
17stderr '=>\s+rsc.io/quote\s+v1.0.0\s+h1:'
18stderr 'Hello, world.'
19
20[short] skip
21
22# Build a binary that accesses its debug info by reading the binary directly
23# (rather than through debug.ReadBuildInfo).
24# The debug info should still be present (golang.org/issue/28753).
25cd unused
26go build
27exec ./unused$GOEXE
28
29-- x/go.mod --
30module x
31
32-- x/lib/lib.go --
33// Package lib accesses runtime/debug.modinfo before package main's init
34// functions have run.
35package lib
36
37import "runtime/debug"
38
39func init() {
40 m, ok := debug.ReadBuildInfo()
41 if !ok {
42 panic("failed debug.ReadBuildInfo")
43 }
44 println("mod", m.Main.Path, m.Main.Version)
45 for _, d := range m.Deps {
46 println("dep", d.Path, d.Version, d.Sum)
47 if r := d.Replace; r != nil {
48 println("=>", r.Path, r.Version, r.Sum)
49 }
50 }
51}
52
53-- x/main.go --
54package main
55
56import (
57 "rsc.io/quote"
58 _ "x/lib"
59)
60
61func main() {
62 println(quote.Hello())
63}
64
65-- x/unused/main.go --
66// The unused binary does not access runtime/debug.modinfo.
67package main
68
69import (
70 "bytes"
71 "encoding/hex"
72 "log"
73 "os"
74
75 _ "rsc.io/quote"
76)
77
78func main() {
79 b, err := os.ReadFile(os.Args[0])
80 if err != nil {
81 log.Fatal(err)
82 }
83
84 infoStart, _ := hex.DecodeString("3077af0c9274080241e1c107e6d618e6")
85 if !bytes.Contains(b, infoStart) {
86 log.Fatal("infoStart not found in binary")
87 }
88 log.Println("ok")
89}
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