| 1 | // Copyright 2014 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // Incomplete source tree on Android. |
| 6 | |
| 7 | //go:build !android |
| 8 | // +build !android |
| 9 | |
| 10 | package pointer |
| 11 | |
| 12 | // This file runs the pointer analysis on all packages and tests beneath |
| 13 | // $GOROOT. It provides a "smoke test" that the analysis doesn't crash |
| 14 | // on a large input, and a benchmark for performance measurement. |
| 15 | // |
| 16 | // Because it is relatively slow, the --stdlib flag must be enabled for |
| 17 | // this test to run: |
| 18 | // % go test -v golang.org/x/tools/go/pointer --stdlib |
| 19 | |
| 20 | import ( |
| 21 | "flag" |
| 22 | "go/token" |
| 23 | "testing" |
| 24 | "time" |
| 25 | |
| 26 | "golang.org/x/tools/go/packages" |
| 27 | "golang.org/x/tools/go/ssa" |
| 28 | "golang.org/x/tools/go/ssa/ssautil" |
| 29 | ) |
| 30 | |
| 31 | var runStdlibTest = flag.Bool("stdlib", false, "Run the (slow) stdlib test") |
| 32 | |
| 33 | func TestStdlib(t *testing.T) { |
| 34 | if !*runStdlibTest { |
| 35 | t.Skip("skipping (slow) stdlib test (use --stdlib)") |
| 36 | } |
| 37 | |
| 38 | cfg := &packages.Config{ |
| 39 | Mode: packages.LoadAllSyntax, |
| 40 | // Create test main packages with a main function. |
| 41 | Tests: true, |
| 42 | } |
| 43 | pkgs, err := packages.Load(cfg, "std") |
| 44 | if err != nil || packages.PrintErrors(pkgs) > 0 { |
| 45 | t.Fatalf("Load failed: %v", err) |
| 46 | } |
| 47 | |
| 48 | // Create SSA packages. |
| 49 | prog, _ := ssautil.AllPackages(pkgs, ssa.InstantiateGenerics) |
| 50 | prog.Build() |
| 51 | |
| 52 | numPkgs := len(prog.AllPackages()) |
| 53 | if want := 240; numPkgs < want { |
| 54 | t.Errorf("Loaded only %d packages, want at least %d", numPkgs, want) |
| 55 | } |
| 56 | |
| 57 | // Determine the set of packages/tests to analyze. |
| 58 | var mains []*ssa.Package |
| 59 | for _, ssapkg := range prog.AllPackages() { |
| 60 | if ssapkg.Pkg.Name() == "main" && ssapkg.Func("main") != nil { |
| 61 | mains = append(mains, ssapkg) |
| 62 | } |
| 63 | } |
| 64 | if mains == nil { |
| 65 | t.Fatal("no tests found in analysis scope") |
| 66 | } |
| 67 | |
| 68 | // Run the analysis. |
| 69 | config := &Config{ |
| 70 | Reflection: false, // TODO(adonovan): fix remaining bug in rVCallConstraint, then enable. |
| 71 | BuildCallGraph: true, |
| 72 | Mains: mains, |
| 73 | } |
| 74 | // TODO(adonovan): add some query values (affects track bits). |
| 75 | |
| 76 | t0 := time.Now() |
| 77 | |
| 78 | result, err := Analyze(config) |
| 79 | if err != nil { |
| 80 | t.Fatal(err) // internal error in pointer analysis |
| 81 | } |
| 82 | _ = result // TODO(adonovan): measure something |
| 83 | |
| 84 | t1 := time.Now() |
| 85 | |
| 86 | // Dump some statistics. |
| 87 | allFuncs := ssautil.AllFunctions(prog) |
| 88 | var numInstrs int |
| 89 | for fn := range allFuncs { |
| 90 | for _, b := range fn.Blocks { |
| 91 | numInstrs += len(b.Instrs) |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | // determine line count |
| 96 | var lineCount int |
| 97 | prog.Fset.Iterate(func(f *token.File) bool { |
| 98 | lineCount += f.LineCount() |
| 99 | return true |
| 100 | }) |
| 101 | |
| 102 | t.Log("#Source lines: ", lineCount) |
| 103 | t.Log("#Instructions: ", numInstrs) |
| 104 | t.Log("Pointer analysis: ", t1.Sub(t0)) |
| 105 | } |
| 106 |
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