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
|
// 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.
// Incomplete source tree on Android.
//go:build !android
// +build !android
package pointer
// This file runs the pointer analysis on all packages and tests beneath
// $GOROOT. It provides a "smoke test" that the analysis doesn't crash
// on a large input, and a benchmark for performance measurement.
//
// Because it is relatively slow, the --stdlib flag must be enabled for
// this test to run:
// % go test -v golang.org/x/tools/go/pointer --stdlib
import (
"flag"
"go/token"
"testing"
"time"
"golang.org/x/tools/go/packages"
"golang.org/x/tools/go/ssa"
"golang.org/x/tools/go/ssa/ssautil"
)
var runStdlibTest = flag.Bool("stdlib", false, "Run the (slow) stdlib test")
func TestStdlib(t *testing.T) {
if !*runStdlibTest {
t.Skip("skipping (slow) stdlib test (use --stdlib)")
}
cfg := &packages.Config{
Mode: packages.LoadAllSyntax,
// Create test main packages with a main function.
Tests: true,
}
pkgs, err := packages.Load(cfg, "std")
if err != nil || packages.PrintErrors(pkgs) > 0 {
t.Fatalf("Load failed: %v", err)
}
// Create SSA packages.
prog, _ := ssautil.AllPackages(pkgs, 0)
prog.Build()
numPkgs := len(prog.AllPackages())
if want := 240; numPkgs < want {
t.Errorf("Loaded only %d packages, want at least %d", numPkgs, want)
}
// Determine the set of packages/tests to analyze.
var mains []*ssa.Package
for _, ssapkg := range prog.AllPackages() {
if ssapkg.Pkg.Name() == "main" && ssapkg.Func("main") != nil {
mains = append(mains, ssapkg)
}
}
if mains == nil {
t.Fatal("no tests found in analysis scope")
}
// Run the analysis.
config := &Config{
Reflection: false, // TODO(adonovan): fix remaining bug in rVCallConstraint, then enable.
BuildCallGraph: true,
Mains: mains,
}
// TODO(adonovan): add some query values (affects track bits).
t0 := time.Now()
result, err := Analyze(config)
if err != nil {
t.Fatal(err) // internal error in pointer analysis
}
_ = result // TODO(adonovan): measure something
t1 := time.Now()
// Dump some statistics.
allFuncs := ssautil.AllFunctions(prog)
var numInstrs int
for fn := range allFuncs {
for _, b := range fn.Blocks {
numInstrs += len(b.Instrs)
}
}
// determine line count
var lineCount int
prog.Fset.Iterate(func(f *token.File) bool {
lineCount += f.LineCount()
return true
})
t.Log("#Source lines: ", lineCount)
t.Log("#Instructions: ", numInstrs)
t.Log("Pointer analysis: ", t1.Sub(t0))
}
|
