| 1 | // Copyright 2022 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 | package gcimporter_test |
| 6 | |
| 7 | import ( |
| 8 | "bytes" |
| 9 | "fmt" |
| 10 | "go/token" |
| 11 | "go/types" |
| 12 | "runtime" |
| 13 | "testing" |
| 14 | "unsafe" |
| 15 | |
| 16 | "golang.org/x/tools/go/gcexportdata" |
| 17 | "golang.org/x/tools/go/packages" |
| 18 | "golang.org/x/tools/internal/testenv" |
| 19 | ) |
| 20 | |
| 21 | // TestStdlib ensures that all packages in std and x/tools can be |
| 22 | // type-checked using export data. Takes around 3s. |
| 23 | func TestStdlib(t *testing.T) { |
| 24 | testenv.NeedsGoPackages(t) |
| 25 | |
| 26 | // gcexportdata.Read rapidly consumes FileSet address space, |
| 27 | // so disable the test on 32-bit machines. |
| 28 | // (We could use a fresh FileSet per type-check, but that |
| 29 | // would require us to re-parse the source using it.) |
| 30 | if unsafe.Sizeof(token.NoPos) < 8 { |
| 31 | t.Skip("skipping test on 32-bit machine") |
| 32 | } |
| 33 | |
| 34 | // Load, parse and type-check the standard library. |
| 35 | // If we have the full source code for x/tools, also load and type-check that. |
| 36 | cfg := &packages.Config{Mode: packages.LoadAllSyntax} |
| 37 | patterns := []string{"std"} |
| 38 | minPkgs := 225 // 'GOOS=plan9 go1.18 list std | wc -l' reports 228; most other platforms have more. |
| 39 | switch runtime.GOOS { |
| 40 | case "android", "ios": |
| 41 | // The go_.*_exec script for mobile builders only copies over the source tree |
| 42 | // for the package under test. |
| 43 | default: |
| 44 | patterns = append(patterns, "golang.org/x/tools/...") |
| 45 | minPkgs += 160 // At the time of writing, 'GOOS=plan9 go list ./... | wc -l' reports 188. |
| 46 | } |
| 47 | pkgs, err := packages.Load(cfg, patterns...) |
| 48 | if err != nil { |
| 49 | t.Fatalf("failed to load/parse/type-check: %v", err) |
| 50 | } |
| 51 | if packages.PrintErrors(pkgs) > 0 { |
| 52 | t.Fatal("there were errors during loading") |
| 53 | } |
| 54 | if len(pkgs) < minPkgs { |
| 55 | t.Errorf("too few packages (%d) were loaded", len(pkgs)) |
| 56 | } |
| 57 | |
| 58 | export := make(map[string][]byte) // keys are package IDs |
| 59 | |
| 60 | // Re-type check them all in post-order, using export data. |
| 61 | packages.Visit(pkgs, nil, func(pkg *packages.Package) { |
| 62 | packages := make(map[string]*types.Package) // keys are package paths |
| 63 | cfg := &types.Config{ |
| 64 | Error: func(e error) { |
| 65 | t.Errorf("type error: %v", e) |
| 66 | }, |
| 67 | Importer: importerFunc(func(importPath string) (*types.Package, error) { |
| 68 | // Resolve import path to (vendored?) package path. |
| 69 | imported := pkg.Imports[importPath] |
| 70 | |
| 71 | if imported.PkgPath == "unsafe" { |
| 72 | return types.Unsafe, nil // unsafe has no exportdata |
| 73 | } |
| 74 | |
| 75 | data, ok := export[imported.ID] |
| 76 | if !ok { |
| 77 | return nil, fmt.Errorf("missing export data for %s", importPath) |
| 78 | } |
| 79 | return gcexportdata.Read(bytes.NewReader(data), pkg.Fset, packages, imported.PkgPath) |
| 80 | }), |
| 81 | } |
| 82 | |
| 83 | // Re-typecheck the syntax and save the export data in the map. |
| 84 | newPkg := types.NewPackage(pkg.PkgPath, pkg.Name) |
| 85 | check := types.NewChecker(cfg, pkg.Fset, newPkg, nil) |
| 86 | check.Files(pkg.Syntax) |
| 87 | |
| 88 | var out bytes.Buffer |
| 89 | if err := gcexportdata.Write(&out, pkg.Fset, newPkg); err != nil { |
| 90 | t.Fatalf("internal error writing export data: %v", err) |
| 91 | } |
| 92 | export[pkg.ID] = out.Bytes() |
| 93 | }) |
| 94 | } |
| 95 |
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