1# This test builds a cgo binary and verifies the source directory path
2# does not appear in the binary, either literally or in compressed DWARF.
3# TODO(golang.org/issue/36072): ideally we should build a binary from identical
4# sources in different directories and verify the binary and all intermediate
5# files are identical.
6
7[short] skip
8[!cgo] skip
9
10# Check that the source path appears when -trimpath is not used.
11go build -o hello.exe .
12grep -q gopath[/\\]src hello.exe
13go run ./list-dwarf hello.exe
14stdout gopath[/\\]src
15
16# Check that the source path does not appear when -trimpath is used.
17[GOOS:aix] stop # can't inspect XCOFF binaries
18go build -trimpath -o hello.exe .
19! grep -q gopath[/\\]src hello.exe
20go run ./list-dwarf hello.exe
21! stdout gopath/src
22
23
24# Do the above, with the cgo (but not .c) sources in an overlay
25# Check that the source path appears when -trimpath is not used.
26mkdir $WORK/overlay
27cp hello.go $WORK/overlay/hello.go
28mkdir hello_overlay
29cp hello.c hello_overlay/hello.c
30go build -overlay overlay.json -o hello_overlay.exe ./hello_overlay
31grep -q gopath[/\\]src hello_overlay.exe
32! grep -q $WORK[/\\]overlay hello_overlay.exe
33go run ./list-dwarf hello_overlay.exe
34stdout gopath[/\\]src
35! stdout $WORK[/\\]overlay
36
37# Check that the source path does not appear when -trimpath is used.
38go build -overlay overlay.json -trimpath -o hello_overlay.exe ./hello_overlay
39! grep -q gopath[/\\]src hello_overlay.exe
40! grep -q $WORK[/\\]overlay hello_overlay.exe
41go run ./list-dwarf hello_overlay.exe
42! stdout gopath/src
43! stdout $WORK[/\\]overlay
44
45-- go.mod --
46module m
47
48go 1.14
49-- overlay.json --
50{
51 "Replace": {
52 "hello_overlay/hello.go": "../../overlay/hello.go"
53 }
54}
55-- hello.c --
56#include <stdio.h>
57
58void say_hello() { puts("Hello, world!\n"); }
59
60-- hello.go --
61package main
62
63// void say_hello();
64import "C"
65
66func main() {
67 C.say_hello()
68}
69
70-- list-dwarf/list-dwarf.go --
71package main
72
73import (
74 "debug/dwarf"
75 "fmt"
76 "io"
77 "log"
78 "os"
79 "sort"
80)
81
82func main() {
83 files, err := run(os.Args[1])
84 if err != nil {
85 log.Fatal(err)
86 }
87 for _, file := range files {
88 fmt.Println(file)
89 }
90}
91
92func run(exePath string) ([]string, error) {
93 dwarfData, err := readDWARF(exePath)
94 if err != nil {
95 return nil, err
96 }
97
98 dwarfReader := dwarfData.Reader()
99 files := make(map[string]bool)
100 for {
101 e, err := dwarfReader.Next()
102 if err != nil {
103 return nil, err
104 }
105 if e == nil {
106 break
107 }
108 lr, err := dwarfData.LineReader(e)
109 if err != nil {
110 return nil, err
111 }
112 if lr == nil {
113 continue
114 }
115
116 var le dwarf.LineEntry
117 for {
118 if err := lr.Next(&le); err != nil {
119 if err == io.EOF {
120 break
121 }
122 return nil, err
123 }
124 files[le.File.Name] = true
125 }
126 }
127
128 sortedFiles := make([]string, 0, len(files))
129 for file := range files {
130 sortedFiles = append(sortedFiles, file)
131 }
132 sort.Strings(sortedFiles)
133 return sortedFiles, nil
134}
135-- list-dwarf/read_darwin.go --
136package main
137
138import (
139 "debug/dwarf"
140 "debug/macho"
141)
142
143func readDWARF(exePath string) (*dwarf.Data, error) {
144 machoFile, err := macho.Open(exePath)
145 if err != nil {
146 return nil, err
147 }
148 defer machoFile.Close()
149 return machoFile.DWARF()
150}
151-- list-dwarf/read_elf.go --
152// +build android dragonfly freebsd illumos linux netbsd openbsd solaris
153
154package main
155
156import (
157 "debug/dwarf"
158 "debug/elf"
159)
160
161func readDWARF(exePath string) (*dwarf.Data, error) {
162 elfFile, err := elf.Open(exePath)
163 if err != nil {
164 return nil, err
165 }
166 defer elfFile.Close()
167 return elfFile.DWARF()
168}
169-- list-dwarf/read_windows.go --
170package main
171
172import (
173 "debug/dwarf"
174 "debug/pe"
175)
176
177func readDWARF(exePath string) (*dwarf.Data, error) {
178 peFile, err := pe.Open(exePath)
179 if err != nil {
180 return nil, err
181 }
182 defer peFile.Close()
183 return peFile.DWARF()
184}
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