1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
// Copyright 2014 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 (
"flag"
"fmt"
"go/build"
"internal/testenv"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"testing"
)
var tmp, exe string // populated by buildObjdump
func TestMain(m *testing.M) {
if !testenv.HasGoBuild() {
return
}
var exitcode int
if err := buildObjdump(); err == nil {
exitcode = m.Run()
} else {
fmt.Println(err)
exitcode = 1
}
os.RemoveAll(tmp)
os.Exit(exitcode)
}
func buildObjdump() error {
var err error
tmp, err = ioutil.TempDir("", "TestObjDump")
if err != nil {
return fmt.Errorf("TempDir failed: %v", err)
}
exe = filepath.Join(tmp, "testobjdump.exe")
gotool, err := testenv.GoTool()
if err != nil {
return err
}
out, err := exec.Command(gotool, "build", "-o", exe, "cmd/objdump").CombinedOutput()
if err != nil {
os.RemoveAll(tmp)
return fmt.Errorf("go build -o %v cmd/objdump: %v\n%s", exe, err, string(out))
}
return nil
}
var x86Need = []string{
"fmthello.go:6",
"TEXT main.main(SB)",
"JMP main.main(SB)",
"CALL fmt.Println(SB)",
"RET",
}
var armNeed = []string{
"fmthello.go:6",
"TEXT main.main(SB)",
//"B.LS main.main(SB)", // TODO(rsc): restore; golang.org/issue/9021
"BL fmt.Println(SB)",
"RET",
}
var ppcNeed = []string{
"fmthello.go:6",
"TEXT main.main(SB)",
"BR main.main(SB)",
"CALL fmt.Println(SB)",
"RET",
}
var target = flag.String("target", "", "test disassembly of `goos/goarch` binary")
// objdump is fully cross platform: it can handle binaries
// from any known operating system and architecture.
// We could in principle add binaries to testdata and check
// all the supported systems during this test. However, the
// binaries would be about 1 MB each, and we don't want to
// add that much junk to the hg repository. Instead, build a
// binary for the current system (only) and test that objdump
// can handle that one.
func testDisasm(t *testing.T, flags ...string) {
goarch := runtime.GOARCH
if *target != "" {
f := strings.Split(*target, "/")
if len(f) != 2 {
t.Fatalf("-target argument must be goos/goarch")
}
defer os.Setenv("GOOS", os.Getenv("GOOS"))
defer os.Setenv("GOARCH", os.Getenv("GOARCH"))
os.Setenv("GOOS", f[0])
os.Setenv("GOARCH", f[1])
goarch = f[1]
}
hello := filepath.Join(tmp, "hello.exe")
args := []string{"build", "-o", hello}
args = append(args, flags...)
args = append(args, "testdata/fmthello.go")
out, err := exec.Command(testenv.GoToolPath(t), args...).CombinedOutput()
if err != nil {
t.Fatalf("go build fmthello.go: %v\n%s", err, out)
}
need := []string{
"fmthello.go:6",
"TEXT main.main(SB)",
}
switch goarch {
case "amd64", "386":
need = append(need, x86Need...)
case "arm":
need = append(need, armNeed...)
case "ppc64", "ppc64le":
need = append(need, ppcNeed...)
}
out, err = exec.Command(exe, "-s", "main.main", hello).CombinedOutput()
if err != nil {
t.Fatalf("objdump fmthello.exe: %v\n%s", err, out)
}
text := string(out)
ok := true
for _, s := range need {
if !strings.Contains(text, s) {
t.Errorf("disassembly missing '%s'", s)
ok = false
}
}
if !ok {
t.Logf("full disassembly:\n%s", text)
}
}
func TestDisasm(t *testing.T) {
switch runtime.GOARCH {
case "arm64":
t.Skipf("skipping on %s, issue 10106", runtime.GOARCH)
case "mips", "mipsle", "mips64", "mips64le":
t.Skipf("skipping on %s, issue 12559", runtime.GOARCH)
case "s390x":
t.Skipf("skipping on %s, issue 15255", runtime.GOARCH)
}
testDisasm(t)
}
func TestDisasmExtld(t *testing.T) {
switch runtime.GOOS {
case "plan9", "windows":
t.Skipf("skipping on %s", runtime.GOOS)
}
switch runtime.GOARCH {
case "ppc64":
t.Skipf("skipping on %s, no support for external linking, issue 9038", runtime.GOARCH)
case "arm64":
t.Skipf("skipping on %s, issue 10106", runtime.GOARCH)
case "mips64", "mips64le":
t.Skipf("skipping on %s, issue 12559 and 12560", runtime.GOARCH)
case "s390x":
t.Skipf("skipping on %s, issue 15255", runtime.GOARCH)
}
// TODO(jsing): Reenable once openbsd/arm has external linking support.
if runtime.GOOS == "openbsd" && runtime.GOARCH == "arm" {
t.Skip("skipping on openbsd/arm, no support for external linking, issue 10619")
}
if !build.Default.CgoEnabled {
t.Skip("skipping because cgo is not enabled")
}
testDisasm(t, "-ldflags=-linkmode=external")
}
|
