Golang程序
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// Copyright 2015 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 (
"bytes"
"errors"
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"os/exec"
"path/filepath"
"reflect"
"regexp"
"runtime"
"strconv"
"strings"
"sync"
"time"
)
func cmdtest() {
gogcflags = os.Getenv("GO_GCFLAGS")
var t tester
var noRebuild bool
flag.BoolVar(&t.listMode, "list", false, "list available tests")
flag.BoolVar(&t.rebuild, "rebuild", false, "rebuild everything first")
flag.BoolVar(&noRebuild, "no-rebuild", false, "overrides -rebuild (historical dreg)")
flag.BoolVar(&t.keepGoing, "k", false, "keep going even when error occurred")
flag.BoolVar(&t.race, "race", false, "run in race builder mode (different set of tests)")
flag.BoolVar(&t.compileOnly, "compile-only", false, "compile tests, but don't run them. This is for some builders. Not all dist tests respect this flag, but most do.")
flag.StringVar(&t.banner, "banner", "##### ", "banner prefix; blank means no section banners")
flag.StringVar(&t.runRxStr, "run", os.Getenv("GOTESTONLY"),
"run only those tests matching the regular expression; empty means to run all. "+
"Special exception: if the string begins with '!', the match is inverted.")
xflagparse(-1) // any number of args
if noRebuild {
t.rebuild = false
}
t.run()
}
// tester executes cmdtest.
type tester struct {
race bool
listMode bool
rebuild bool
failed bool
keepGoing bool
compileOnly bool // just try to compile all tests, but no need to run
runRxStr string
runRx *regexp.Regexp
runRxWant bool // want runRx to match (true) or not match (false)
runNames []string // tests to run, exclusive with runRx; empty means all
banner string // prefix, or "" for none
lastHeading string // last dir heading printed
cgoEnabled bool
partial bool
haveTime bool // the 'time' binary is available
tests []distTest
timeoutScale int
worklist []*work
}
type work struct {
dt *distTest
cmd *exec.Cmd
start chan bool
out []byte
err error
end chan bool
}
// A distTest is a test run by dist test.
// Each test has a unique name and belongs to a group (heading)
type distTest struct {
name string // unique test name; may be filtered with -run flag
heading string // group section; this header is printed before the test is run.
fn func(*distTest) error
}
func (t *tester) run() {
timelog("start", "dist test")
var exeSuffix string
if goos == "windows" {
exeSuffix = ".exe"
}
if _, err := os.Stat(filepath.Join(gobin, "go"+exeSuffix)); err == nil {
os.Setenv("PATH", fmt.Sprintf("%s%c%s", gobin, os.PathListSeparator, os.Getenv("PATH")))
}
slurp, err := exec.Command("go", "env", "CGO_ENABLED").Output()
if err != nil {
log.Fatalf("Error running go env CGO_ENABLED: %v", err)
}
t.cgoEnabled, _ = strconv.ParseBool(strings.TrimSpace(string(slurp)))
if flag.NArg() > 0 && t.runRxStr != "" {
log.Fatalf("the -run regular expression flag is mutually exclusive with test name arguments")
}
t.runNames = flag.Args()
if t.hasBash() {
if _, err := exec.LookPath("time"); err == nil {
t.haveTime = true
}
}
if t.rebuild {
t.out("Building packages and commands.")
// Force rebuild the whole toolchain.
goInstall("go", append([]string{"-a", "-i"}, toolchain...)...)
}
// Complete rebuild bootstrap, even with -no-rebuild.
// If everything is up-to-date, this is a no-op.
// If everything is not up-to-date, the first checkNotStale
// during the test process will kill the tests, so we might
// as well install the world.
// Now that for example "go install cmd/compile" does not
// also install runtime (you need "go install -i cmd/compile"
// for that), it's easy for previous workflows like
// "rebuild the compiler and then run run.bash"
// to break if we don't automatically refresh things here.
// Rebuilding is a shortened bootstrap.
// See cmdbootstrap for a description of the overall process.
//
// But don't do this if we're running in the Go build system,
// where cmd/dist is invoked many times. This just slows that
// down (Issue 24300).
if !t.listMode && os.Getenv("GO_BUILDER_NAME") == "" {
goInstall("go", append([]string{"-i"}, toolchain...)...)
goInstall("go", append([]string{"-i"}, toolchain...)...)
goInstall("go", "std", "cmd")
checkNotStale("go", "std", "cmd")
}
t.timeoutScale = 1
switch goarch {
case "arm":
t.timeoutScale = 2
case "mips", "mipsle", "mips64", "mips64le":
t.timeoutScale = 4
}
if s := os.Getenv("GO_TEST_TIMEOUT_SCALE"); s != "" {
t.timeoutScale, err = strconv.Atoi(s)
if err != nil {
log.Fatalf("failed to parse $GO_TEST_TIMEOUT_SCALE = %q as integer: %v", s, err)
}
}
if t.runRxStr != "" {
if t.runRxStr[0] == '!' {
t.runRxWant = false
t.runRxStr = t.runRxStr[1:]
} else {
t.runRxWant = true
}
t.runRx = regexp.MustCompile(t.runRxStr)
}
t.registerTests()
if t.listMode {
for _, tt := range t.tests {
fmt.Println(tt.name)
}
return
}
// We must unset GOROOT_FINAL before tests, because runtime/debug requires
// correct access to source code, so if we have GOROOT_FINAL in effect,
// at least runtime/debug test will fail.
// If GOROOT_FINAL was set before, then now all the commands will appear stale.
// Nothing we can do about that other than not checking them below.
// (We call checkNotStale but only with "std" not "cmd".)
os.Setenv("GOROOT_FINAL_OLD", os.Getenv("GOROOT_FINAL")) // for cmd/link test
os.Unsetenv("GOROOT_FINAL")
for _, name := range t.runNames {
if !t.isRegisteredTestName(name) {
log.Fatalf("unknown test %q", name)
}
}
for _, dt := range t.tests {
if !t.shouldRunTest(dt.name) {
t.partial = true
continue
}
dt := dt // dt used in background after this iteration
if err := dt.fn(&dt); err != nil {
t.runPending(&dt) // in case that hasn't been done yet
t.failed = true
if t.keepGoing {
log.Printf("Failed: %v", err)
} else {
log.Fatalf("Failed: %v", err)
}
}
}
t.runPending(nil)
timelog("end", "dist test")
if t.failed {
fmt.Println("\nFAILED")
os.Exit(1)
} else if incomplete[goos+"/"+goarch] {
fmt.Println("\nFAILED (incomplete port)")
os.Exit(1)
} else if t.partial {
fmt.Println("\nALL TESTS PASSED (some were excluded)")
} else {
fmt.Println("\nALL TESTS PASSED")
}
}
func (t *tester) shouldRunTest(name string) bool {
if t.runRx != nil {
return t.runRx.MatchString(name) == t.runRxWant
}
if len(t.runNames) == 0 {
return true
}
for _, runName := range t.runNames {
if runName == name {
return true
}
}
return false
}
// short returns a -short flag to pass to 'go test'.
// It returns "-short", unless the environment variable
// GO_TEST_SHORT is set to a non-empty, false-ish string.
//
// This environment variable is meant to be an internal
// detail between the Go build system and cmd/dist
// and is not intended for use by users.
func short() string {
if v := os.Getenv("GO_TEST_SHORT"); v != "" {
short, err := strconv.ParseBool(v)
if err != nil {
log.Fatalf("invalid GO_TEST_SHORT %q: %v", v, err)
}
if !short {
return "-short=false"
}
}
return "-short"
}
// goTest returns the beginning of the go test command line.
// Callers should use goTest and then pass flags overriding these
// defaults as later arguments in the command line.
func (t *tester) goTest() []string {
return []string{
"go", "test", short(), "-count=1", t.tags(), t.runFlag(""),
}
}
func (t *tester) tags() string {
if t.iOS() {
return "-tags=lldb"
}
return "-tags="
}
func (t *tester) timeout(sec int) string {
return "-timeout=" + fmt.Sprint(time.Duration(sec)*time.Second*time.Duration(t.timeoutScale))
}
// ranGoTest and stdMatches are state closed over by the stdlib
// testing func in registerStdTest below. The tests are run
// sequentially, so there's no need for locks.
//
// ranGoBench and benchMatches are the same, but are only used
// in -race mode.
var (
ranGoTest bool
stdMatches []string
ranGoBench bool
benchMatches []string
)
func (t *tester) registerStdTest(pkg string) {
testName := "go_test:" + pkg
if t.runRx == nil || t.runRx.MatchString(testName) == t.runRxWant {
stdMatches = append(stdMatches, pkg)
}
t.tests = append(t.tests, distTest{
name: testName,
heading: "Testing packages.",
fn: func(dt *distTest) error {
if ranGoTest {
return nil
}
t.runPending(dt)
timelog("start", dt.name)
defer timelog("end", dt.name)
ranGoTest = true
timeoutSec := 180
for _, pkg := range stdMatches {
if pkg == "cmd/go" {
timeoutSec *= 3
break
}
}
args := []string{
"test",
short(),
t.tags(),
t.timeout(timeoutSec),
"-gcflags=all=" + gogcflags,
}
if t.race {
args = append(args, "-race")
}
if t.compileOnly {
args = append(args, "-run=^$")
} else if goos == "js" && goarch == "wasm" {
args = append(args, "-run=^Test") // exclude examples; Issue 25913
}
args = append(args, stdMatches...)
cmd := exec.Command("go", args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
return cmd.Run()
},
})
}
func (t *tester) registerRaceBenchTest(pkg string) {
testName := "go_test_bench:" + pkg
if t.runRx == nil || t.runRx.MatchString(testName) == t.runRxWant {
benchMatches = append(benchMatches, pkg)
}
t.tests = append(t.tests, distTest{
name: testName,
heading: "Running benchmarks briefly.",
fn: func(dt *distTest) error {
if ranGoBench {
return nil
}
t.runPending(dt)
timelog("start", dt.name)
defer timelog("end", dt.name)
ranGoBench = true
args := []string{
"test",
short(),
"-race",
t.timeout(1200), // longer timeout for race with benchmarks
"-run=^$", // nothing. only benchmarks.
"-benchtime=.1s",
"-cpu=4",
}
if !t.compileOnly {
args = append(args, "-bench=.*")
}
args = append(args, benchMatches...)
cmd := exec.Command("go", args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
return cmd.Run()
},
})
}
// stdOutErrAreTerminals is defined in test_linux.go, to report
// whether stdout & stderr are terminals.
var stdOutErrAreTerminals func() bool
func (t *tester) registerTests() {
if strings.HasSuffix(os.Getenv("GO_BUILDER_NAME"), "-vetall") {
// Run vet over std and cmd and call it quits.
for k := range cgoEnabled {
osarch := k
t.tests = append(t.tests, distTest{
name: "vet/" + osarch,
heading: "cmd/vet/all",
fn: func(dt *distTest) error {
t.addCmd(dt, "src/cmd/vet/all", "go", "run", "main.go", "-p="+osarch)
return nil
},
})
}
return
}
// Fast path to avoid the ~1 second of `go list std cmd` when
// the caller lists specific tests to run. (as the continuous
// build coordinator does).
if len(t.runNames) > 0 {
for _, name := range t.runNames {
if strings.HasPrefix(name, "go_test:") {
t.registerStdTest(strings.TrimPrefix(name, "go_test:"))
}
if strings.HasPrefix(name, "go_test_bench:") {
t.registerRaceBenchTest(strings.TrimPrefix(name, "go_test_bench:"))
}
}
} else {
// Use a format string to only list packages and commands that have tests.
const format = "{{if (or .TestGoFiles .XTestGoFiles)}}{{.ImportPath}}{{end}}"
cmd := exec.Command("go", "list", "-f", format)
if t.race {
cmd.Args = append(cmd.Args, "-tags=race")
}
cmd.Args = append(cmd.Args, "std")
if !t.race {
cmd.Args = append(cmd.Args, "cmd")
}
all, err := cmd.Output()
if err != nil {
log.Fatalf("Error running go list std cmd: %v, %s", err, all)
}
pkgs := strings.Fields(string(all))
for _, pkg := range pkgs {
t.registerStdTest(pkg)
}
if t.race {
for _, pkg := range pkgs {
if t.packageHasBenchmarks(pkg) {
t.registerRaceBenchTest(pkg)
}
}
}
}
// Test the os/user package in the pure-Go mode too.
if !t.compileOnly {
t.tests = append(t.tests, distTest{
name: "osusergo",
heading: "os/user with tag osusergo",
fn: func(dt *distTest) error {
t.addCmd(dt, "src", t.goTest(), t.timeout(300), "-tags=osusergo", "os/user")
return nil
},
})
}
if t.race {
return
}
// Runtime CPU tests.
if !t.compileOnly && goos != "js" { // js can't handle -cpu != 1
testName := "runtime:cpu124"
t.tests = append(t.tests, distTest{
name: testName,
heading: "GOMAXPROCS=2 runtime -cpu=1,2,4 -quick",
fn: func(dt *distTest) error {
cmd := t.addCmd(dt, "src", t.goTest(), t.timeout(300), "runtime", "-cpu=1,2,4", "-quick")
// We set GOMAXPROCS=2 in addition to -cpu=1,2,4 in order to test runtime bootstrap code,
// creation of first goroutines and first garbage collections in the parallel setting.
cmd.Env = append(os.Environ(), "GOMAXPROCS=2")
return nil
},
})
}
// This test needs its stdout/stderr to be terminals, so we don't run it from cmd/go's tests.
// See issue 18153.
if goos == "linux" {
t.tests = append(t.tests, distTest{
name: "cmd_go_test_terminal",
heading: "cmd/go terminal test",
fn: func(dt *distTest) error {
t.runPending(dt)
timelog("start", dt.name)
defer timelog("end", dt.name)
if !stdOutErrAreTerminals() {
fmt.Println("skipping terminal test; stdout/stderr not terminals")
return nil
}
cmd := exec.Command("go", "test")
cmd.Dir = filepath.Join(os.Getenv("GOROOT"), "src/cmd/go/testdata/testterminal18153")
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
return cmd.Run()
},
})
}
// On the builders only, test that a moved GOROOT still works.
// Fails on iOS because CC_FOR_TARGET refers to clangwrap.sh
// in the unmoved GOROOT.
// Fails on Android and js/wasm with an exec format error.
// Fails on plan9 with "cannot find GOROOT" (issue #21016).
if os.Getenv("GO_BUILDER_NAME") != "" && goos != "android" && !t.iOS() && goos != "plan9" && goos != "js" {
t.tests = append(t.tests, distTest{
name: "moved_goroot",
heading: "moved GOROOT",
fn: func(dt *distTest) error {
t.runPending(dt)
timelog("start", dt.name)
defer timelog("end", dt.name)
moved := goroot + "-moved"
if err := os.Rename(goroot, moved); err != nil {
if goos == "windows" {
// Fails on Windows (with "Access is denied") if a process
// or binary is in this directory. For instance, using all.bat
// when run from c:\workdir\go\src fails here
// if GO_BUILDER_NAME is set. Our builders invoke tests
// a different way which happens to work when sharding
// tests, but we should be tolerant of the non-sharded
// all.bat case.
log.Printf("skipping test on Windows")
return nil
}
return err
}
// Run `go test fmt` in the moved GOROOT.
cmd := exec.Command(filepath.Join(moved, "bin", "go"), "test", "fmt")
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
// Don't set GOROOT in the environment.
for _, e := range os.Environ() {
if !strings.HasPrefix(e, "GOROOT=") && !strings.HasPrefix(e, "GOCACHE=") {
cmd.Env = append(cmd.Env, e)
}
}
err := cmd.Run()
if rerr := os.Rename(moved, goroot); rerr != nil {
log.Fatalf("failed to restore GOROOT: %v", rerr)
}
return err
},
})
}
// Test that internal linking of standard packages does not
// require libgcc. This ensures that we can install a Go
// release on a system that does not have a C compiler
// installed and still build Go programs (that don't use cgo).
for _, pkg := range cgoPackages {
if !t.internalLink() {
break
}
// ARM libgcc may be Thumb, which internal linking does not support.
if goarch == "arm" {
break
}
pkg := pkg
var run string
if pkg == "net" {
run = "TestTCPStress"
}
t.tests = append(t.tests, distTest{
name: "nolibgcc:" + pkg,
heading: "Testing without libgcc.",
fn: func(dt *distTest) error {
t.addCmd(dt, "src", t.goTest(), "-ldflags=-linkmode=internal -libgcc=none", pkg, t.runFlag(run))
return nil
},
})
}
// Test internal linking of PIE binaries where it is supported.
if goos == "linux" && goarch == "amd64" && !isAlpineLinux() {
// Issue 18243: We don't have a way to set the default
// dynamic linker used in internal linking mode. So
// this test is skipped on Alpine.
t.tests = append(t.tests, distTest{
name: "pie_internal",
heading: "internal linking of -buildmode=pie",
fn: func(dt *distTest) error {
t.addCmd(dt, "src", t.goTest(), "reflect", "-buildmode=pie", "-ldflags=-linkmode=internal", t.timeout(60))
return nil
},
})
}
// sync tests
if goos != "js" { // js doesn't support -cpu=10
t.tests = append(t.tests, distTest{
name: "sync_cpu",
heading: "sync -cpu=10",
fn: func(dt *distTest) error {
t.addCmd(dt, "src", t.goTest(), "sync", t.timeout(120), "-cpu=10", t.runFlag(""))
return nil
},
})
}
if t.raceDetectorSupported() {
t.tests = append(t.tests, distTest{
name: "race",
heading: "Testing race detector",
fn: t.raceTest,
})
}
if t.cgoEnabled && !t.iOS() {
// Disabled on iOS. golang.org/issue/15919
t.tests = append(t.tests, distTest{
name: "cgo_stdio",
heading: "../misc/cgo/stdio",
fn: func(dt *distTest) error {
t.addCmd(dt, "misc/cgo/stdio", "go", "run", filepath.Join(os.Getenv("GOROOT"), "test/run.go"), "-", ".")
return nil
},
})
t.tests = append(t.tests, distTest{
name: "cgo_life",
heading: "../misc/cgo/life",
fn: func(dt *distTest) error {
t.addCmd(dt, "misc/cgo/life", "go", "run", filepath.Join(os.Getenv("GOROOT"), "test/run.go"), "-", ".")
return nil
},
})
fortran := os.Getenv("FC")
if fortran == "" {
fortran, _ = exec.LookPath("gfortran")
}
if t.hasBash() && fortran != "" {
t.tests = append(t.tests, distTest{
name: "cgo_fortran",
heading: "../misc/cgo/fortran",
fn: func(dt *distTest) error {
t.addCmd(dt, "misc/cgo/fortran", "./test.bash", fortran)
return nil
},
})
}
if t.hasSwig() && goos != "android" {
t.tests = append(t.tests, distTest{
name: "swig_stdio",
heading: "../misc/swig/stdio",
fn: func(dt *distTest) error {
t.addCmd(dt, "misc/swig/stdio", t.goTest())
return nil
},
})
if t.hasCxx() {
t.tests = append(t.tests, distTest{
name: "swig_callback",
heading: "../misc/swig/callback",
fn: func(dt *distTest) error {
t.addCmd(dt, "misc/swig/callback", t.goTest())
return nil
},
})
}
}
}
if t.cgoEnabled {
t.tests = append(t.tests, distTest{
name: "cgo_test",
heading: "../misc/cgo/test",
fn: t.cgoTest,
})
}
if t.hasBash() && t.cgoEnabled && goos != "android" && goos != "darwin" {
t.registerTest("testgodefs", "../misc/cgo/testgodefs", "./test.bash")
}
// Don't run these tests with $GO_GCFLAGS because most of them
// assume that they can run "go install" with no -gcflags and not
// recompile the entire standard library. If make.bash ran with
// special -gcflags, that's not true.
if t.cgoEnabled && gogcflags == "" {
if t.cgoTestSOSupported() {
t.tests = append(t.tests, distTest{
name: "testso",
heading: "../misc/cgo/testso",
fn: func(dt *distTest) error {
return t.cgoTestSO(dt, "misc/cgo/testso")
},
})
t.tests = append(t.tests, distTest{
name: "testsovar",
heading: "../misc/cgo/testsovar",
fn: func(dt *distTest) error {
return t.cgoTestSO(dt, "misc/cgo/testsovar")
},
})
}
if t.supportedBuildmode("c-archive") {
t.registerHostTest("testcarchive", "../misc/cgo/testcarchive", "misc/cgo/testcarchive", "carchive_test.go")
}
if t.supportedBuildmode("c-shared") {
t.registerHostTest("testcshared", "../misc/cgo/testcshared", "misc/cgo/testcshared", "cshared_test.go")
}
if t.supportedBuildmode("shared") {
t.registerTest("testshared", "../misc/cgo/testshared", t.goTest(), t.timeout(600))
}
if t.supportedBuildmode("plugin") {
t.registerTest("testplugin", "../misc/cgo/testplugin", "./test.bash")
}
if gohostos == "linux" && goarch == "amd64" {
t.registerTest("testasan", "../misc/cgo/testasan", "go", "run", "main.go")
}
if mSanSupported(goos, goarch) {
t.registerHostTest("testsanitizers/msan", "../misc/cgo/testsanitizers", "misc/cgo/testsanitizers", ".")
}
if t.hasBash() && goos != "android" && !t.iOS() && gohostos != "windows" {
t.registerHostTest("cgo_errors", "../misc/cgo/errors", "misc/cgo/errors", ".")
}
if gohostos == "linux" && t.extLink() {
t.registerTest("testsigfwd", "../misc/cgo/testsigfwd", "go", "run", "main.go")
}
}
// Doc tests only run on builders.
// They find problems approximately never.
if t.hasBash() && goos != "nacl" && goos != "js" && goos != "android" && !t.iOS() && os.Getenv("GO_BUILDER_NAME") != "" {
t.registerTest("doc_progs", "../doc/progs", "time", "go", "run", "run.go")
t.registerTest("wiki", "../doc/articles/wiki", "./test.bash")
t.registerTest("codewalk", "../doc/codewalk", "time", "./run")
}
if goos != "android" && !t.iOS() {
t.registerTest("bench_go1", "../test/bench/go1", t.goTest(), t.timeout(600))
}
if goos != "android" && !t.iOS() {
// Only start multiple test dir shards on builders,
// where they get distributed to multiple machines.
// See issue 20141.
nShards := 1
if os.Getenv("GO_BUILDER_NAME") != "" {
nShards = 10
}
for shard := 0; shard < nShards; shard++ {
shard := shard
t.tests = append(t.tests, distTest{
name: fmt.Sprintf("test:%d_%d", shard, nShards),
heading: "../test",
fn: func(dt *distTest) error { return t.testDirTest(dt, shard, nShards) },
})
}
}
if goos != "nacl" && goos != "android" && !t.iOS() && goos != "js" {
t.tests = append(t.tests, distTest{
name: "api",
heading: "API check",
fn: func(dt *distTest) error {
if t.compileOnly {
t.addCmd(dt, "src", "go", "build", filepath.Join(goroot, "src/cmd/api/run.go"))
return nil
}
t.addCmd(dt, "src", "go", "run", filepath.Join(goroot, "src/cmd/api/run.go"))
return nil
},
})
}
}
// isRegisteredTestName reports whether a test named testName has already
// been registered.
func (t *tester) isRegisteredTestName(testName string) bool {
for _, tt := range t.tests {
if tt.name == testName {
return true
}
}
return false
}
func (t *tester) registerTest1(seq bool, name, dirBanner string, cmdline ...interface{}) {
bin, args := flattenCmdline(cmdline)
if bin == "time" && !t.haveTime {
bin, args = args[0], args[1:]
}
if t.isRegisteredTestName(name) {
panic("duplicate registered test name " + name)
}
t.tests = append(t.tests, distTest{
name: name,
heading: dirBanner,
fn: func(dt *distTest) error {
if seq {
t.runPending(dt)
timelog("start", name)
defer timelog("end", name)
return t.dirCmd(filepath.Join(goroot, "src", dirBanner), bin, args).Run()
}
t.addCmd(dt, filepath.Join(goroot, "src", dirBanner), bin, args)
return nil
},
})
}
func (t *tester) registerTest(name, dirBanner string, cmdline ...interface{}) {
t.registerTest1(false, name, dirBanner, cmdline...)
}
func (t *tester) registerSeqTest(name, dirBanner string, cmdline ...interface{}) {
t.registerTest1(true, name, dirBanner, cmdline...)
}
func (t *tester) bgDirCmd(dir, bin string, args ...string) *exec.Cmd {
cmd := exec.Command(bin, args...)
if filepath.IsAbs(dir) {
cmd.Dir = dir
} else {
cmd.Dir = filepath.Join(goroot, dir)
}
return cmd
}
func (t *tester) dirCmd(dir string, cmdline ...interface{}) *exec.Cmd {
bin, args := flattenCmdline(cmdline)
cmd := t.bgDirCmd(dir, bin, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if vflag > 1 {
errprintf("%s\n", strings.Join(cmd.Args, " "))
}
return cmd
}
// flattenCmdline flattens a mixture of string and []string as single list
// and then interprets it as a command line: first element is binary, then args.
func flattenCmdline(cmdline []interface{}) (bin string, args []string) {
var list []string
for _, x := range cmdline {
switch x := x.(type) {
case string:
list = append(list, x)
case []string:
list = append(list, x...)
default:
panic("invalid addCmd argument type: " + reflect.TypeOf(x).String())
}
}
// The go command is too picky about duplicated flags.
// Drop all but the last of the allowed duplicated flags.
drop := make([]bool, len(list))
have := map[string]int{}
for i := 1; i < len(list); i++ {
j := strings.Index(list[i], "=")
if j < 0 {
continue
}
flag := list[i][:j]
switch flag {
case "-run", "-tags":
if have[flag] != 0 {
drop[have[flag]] = true
}
have[flag] = i
}
}
out := list[:0]
for i, x := range list {
if !drop[i] {
out = append(out, x)
}
}
list = out
return list[0], list[1:]
}
func (t *tester) addCmd(dt *distTest, dir string, cmdline ...interface{}) *exec.Cmd {
bin, args := flattenCmdline(cmdline)
w := &work{
dt: dt,
cmd: t.bgDirCmd(dir, bin, args...),
}
t.worklist = append(t.worklist, w)
return w.cmd
}
func (t *tester) iOS() bool {
return goos == "darwin" && (goarch == "arm" || goarch == "arm64")
}
func (t *tester) out(v string) {
if t.banner == "" {
return
}
fmt.Println("\n" + t.banner + v)
}
func (t *tester) extLink() bool {
pair := gohostos + "-" + goarch
switch pair {
case "android-arm",
"darwin-386", "darwin-amd64", "darwin-arm", "darwin-arm64",
"dragonfly-amd64",
"freebsd-386", "freebsd-amd64", "freebsd-arm",
"linux-386", "linux-amd64", "linux-arm", "linux-arm64", "linux-ppc64le", "linux-mips64", "linux-mips64le", "linux-mips", "linux-mipsle", "linux-s390x",
"netbsd-386", "netbsd-amd64",
"openbsd-386", "openbsd-amd64",
"windows-386", "windows-amd64":
return true
}
return false
}
func (t *tester) internalLink() bool {
if gohostos == "dragonfly" {
// linkmode=internal fails on dragonfly since errno is a TLS relocation.
return false
}
if gohostarch == "ppc64le" {
// linkmode=internal fails on ppc64le because cmd/link doesn't
// handle the TOC correctly (issue 15409).
return false
}
if goos == "android" {
return false
}
if goos == "darwin" && (goarch == "arm" || goarch == "arm64") {
return false
}
// Internally linking cgo is incomplete on some architectures.
// https://golang.org/issue/10373
// https://golang.org/issue/14449
if goarch == "arm64" || goarch == "mips64" || goarch == "mips64le" || goarch == "mips" || goarch == "mipsle" {
return false
}
if isAlpineLinux() {
// Issue 18243.
return false
}
return true
}
func (t *tester) supportedBuildmode(mode string) bool {
pair := goos + "-" + goarch
switch mode {
case "c-archive":
if !t.extLink() {
return false
}
switch pair {
case "darwin-386", "darwin-amd64", "darwin-arm", "darwin-arm64",
"linux-amd64", "linux-386", "linux-ppc64le", "linux-s390x",
"freebsd-amd64",
"windows-amd64", "windows-386":
return true
}
return false
case "c-shared":
switch pair {
case "linux-386", "linux-amd64", "linux-arm", "linux-arm64", "linux-ppc64le", "linux-s390x",
"darwin-amd64", "darwin-386",
"freebsd-amd64",
"android-arm", "android-arm64", "android-386",
"windows-amd64", "windows-386":
return true
}
return false
case "shared":
switch pair {
case "linux-386", "linux-amd64", "linux-arm", "linux-arm64", "linux-ppc64le", "linux-s390x":
return true
}
return false
case "plugin":
// linux-arm64 is missing because it causes the external linker
// to crash, see https://golang.org/issue/17138
switch pair {
case "linux-386", "linux-amd64", "linux-arm", "linux-s390x", "linux-ppc64le":
return true
case "darwin-amd64":
return true
}
return false
case "pie":
switch pair {
case "linux-386", "linux-amd64", "linux-arm", "linux-arm64", "linux-ppc64le", "linux-s390x",
"android-amd64", "android-arm", "android-arm64", "android-386":
return true
case "darwin-amd64":
return true
}
return false
default:
log.Fatalf("internal error: unknown buildmode %s", mode)
return false
}
}
func (t *tester) registerHostTest(name, heading, dir, pkg string) {
t.tests = append(t.tests, distTest{
name: name,
heading: heading,
fn: func(dt *distTest) error {
t.runPending(dt)
timelog("start", name)
defer timelog("end", name)
return t.runHostTest(dir, pkg)
},
})
}
func (t *tester) runHostTest(dir, pkg string) error {
defer os.Remove(filepath.Join(goroot, dir, "test.test"))
cmd := t.dirCmd(dir, t.goTest(), "-c", "-o", "test.test", pkg)
cmd.Env = append(os.Environ(), "GOARCH="+gohostarch, "GOOS="+gohostos)
if err := cmd.Run(); err != nil {
return err
}
return t.dirCmd(dir, "./test.test").Run()
}
func (t *tester) cgoTest(dt *distTest) error {
t.addCmd(dt, "misc/cgo/test", t.goTest(), "-ldflags", "-linkmode=auto")
if t.internalLink() {
t.addCmd(dt, "misc/cgo/test", t.goTest(), "-tags=internal", "-ldflags", "-linkmode=internal")
}
pair := gohostos + "-" + goarch
switch pair {
case "darwin-386", "darwin-amd64",
"openbsd-386", "openbsd-amd64",
"windows-386", "windows-amd64":
// test linkmode=external, but __thread not supported, so skip testtls.
if !t.extLink() {
break
}
t.addCmd(dt, "misc/cgo/test", t.goTest(), "-ldflags", "-linkmode=external")
t.addCmd(dt, "misc/cgo/test", t.goTest(), "-ldflags", "-linkmode=external -s")
case "android-arm",
"dragonfly-amd64",
"freebsd-386", "freebsd-amd64", "freebsd-arm",
"linux-386", "linux-amd64", "linux-arm", "linux-ppc64le", "linux-s390x",
"netbsd-386", "netbsd-amd64":
cmd := t.addCmd(dt, "misc/cgo/test", t.goTest(), "-ldflags", "-linkmode=external")
// A -g argument in CGO_CFLAGS should not affect how the test runs.
cmd.Env = append(os.Environ(), "CGO_CFLAGS=-g0")
t.addCmd(dt, "misc/cgo/testtls", t.goTest(), "-ldflags", "-linkmode=auto")
t.addCmd(dt, "misc/cgo/testtls", t.goTest(), "-ldflags", "-linkmode=external")
switch pair {
case "netbsd-386", "netbsd-amd64":
// no static linking
case "freebsd-arm":
// -fPIC compiled tls code will use __tls_get_addr instead
// of __aeabi_read_tp, however, on FreeBSD/ARM, __tls_get_addr
// is implemented in rtld-elf, so -fPIC isn't compatible with
// static linking on FreeBSD/ARM with clang. (cgo depends on
// -fPIC fundamentally.)
default:
cmd := t.dirCmd("misc/cgo/test",
compilerEnvLookup(defaultcc, goos, goarch), "-xc", "-o", "/dev/null", "-static", "-")
cmd.Stdin = strings.NewReader("int main() {}")
if err := cmd.Run(); err != nil {
fmt.Println("No support for static linking found (lacks libc.a?), skip cgo static linking test.")
} else {
if goos != "android" {
t.addCmd(dt, "misc/cgo/testtls", t.goTest(), "-ldflags", `-linkmode=external -extldflags "-static -pthread"`)
}
t.addCmd(dt, "misc/cgo/nocgo", t.goTest())
t.addCmd(dt, "misc/cgo/nocgo", t.goTest(), "-ldflags", `-linkmode=external`)
if goos != "android" {
t.addCmd(dt, "misc/cgo/nocgo", t.goTest(), "-ldflags", `-linkmode=external -extldflags "-static -pthread"`)
t.addCmd(dt, "misc/cgo/test", t.goTest(), "-tags=static", "-ldflags", `-linkmode=external -extldflags "-static -pthread"`)
// -static in CGO_LDFLAGS triggers a different code path
// than -static in -extldflags, so test both.
// See issue #16651.
cmd := t.addCmd(dt, "misc/cgo/test", t.goTest(), "-tags=static")
cmd.Env = append(os.Environ(), "CGO_LDFLAGS=-static -pthread")
}
}
if t.supportedBuildmode("pie") {
t.addCmd(dt, "misc/cgo/test", t.goTest(), "-buildmode=pie")
t.addCmd(dt, "misc/cgo/testtls", t.goTest(), "-buildmode=pie")
t.addCmd(dt, "misc/cgo/nocgo", t.goTest(), "-buildmode=pie")
}
}
}
return nil
}
// run pending test commands, in parallel, emitting headers as appropriate.
// When finished, emit header for nextTest, which is going to run after the
// pending commands are done (and runPending returns).
// A test should call runPending if it wants to make sure that it is not
// running in parallel with earlier tests, or if it has some other reason
// for needing the earlier tests to be done.
func (t *tester) runPending(nextTest *distTest) {
checkNotStale("go", "std")
worklist := t.worklist
t.worklist = nil
for _, w := range worklist {
w.start = make(chan bool)
w.end = make(chan bool)
go func(w *work) {
if !<-w.start {
timelog("skip", w.dt.name)
w.out = []byte(fmt.Sprintf("skipped due to earlier error\n"))
} else {
timelog("start", w.dt.name)
w.out, w.err = w.cmd.CombinedOutput()
}
timelog("end", w.dt.name)
w.end <- true
}(w)
}
started := 0
ended := 0
var last *distTest
for ended < len(worklist) {
for started < len(worklist) && started-ended < maxbg {
//println("start", started)
w := worklist[started]
started++
w.start <- !t.failed || t.keepGoing
}
w := worklist[ended]
dt := w.dt
if dt.heading != "" && t.lastHeading != dt.heading {
t.lastHeading = dt.heading
t.out(dt.heading)
}
if dt != last {
// Assumes all the entries for a single dt are in one worklist.
last = w.dt
if vflag > 0 {
fmt.Printf("# go tool dist test -run=^%s$\n", dt.name)
}
}
if vflag > 1 {
errprintf("%s\n", strings.Join(w.cmd.Args, " "))
}
//println("wait", ended)
ended++
<-w.end
os.Stdout.Write(w.out)
if w.err != nil {
log.Printf("Failed: %v", w.err)
t.failed = true
}
checkNotStale("go", "std")
}
if t.failed && !t.keepGoing {
log.Fatal("FAILED")
}
if dt := nextTest; dt != nil {
if dt.heading != "" && t.lastHeading != dt.heading {
t.lastHeading = dt.heading
t.out(dt.heading)
}
if vflag > 0 {
fmt.Printf("# go tool dist test -run=^%s$\n", dt.name)
}
}
}
func (t *tester) cgoTestSOSupported() bool {
if goos == "android" || t.iOS() {
// No exec facility on Android or iOS.
return false
}
if goarch == "ppc64" {
// External linking not implemented on ppc64 (issue #8912).
return false
}
if goarch == "mips64le" || goarch == "mips64" {
// External linking not implemented on mips64.
return false
}
return true
}
func (t *tester) cgoTestSO(dt *distTest, testpath string) error {
t.runPending(dt)
timelog("start", dt.name)
defer timelog("end", dt.name)
dir := filepath.Join(goroot, testpath)
// build shared object
output, err := exec.Command("go", "env", "CC").Output()
if err != nil {
return fmt.Errorf("Error running go env CC: %v", err)
}
cc := strings.TrimSuffix(string(output), "\n")
if cc == "" {
return errors.New("CC environment variable (go env CC) cannot be empty")
}
output, err = exec.Command("go", "env", "GOGCCFLAGS").Output()
if err != nil {
return fmt.Errorf("Error running go env GOGCCFLAGS: %v", err)
}
gogccflags := strings.Split(strings.TrimSuffix(string(output), "\n"), " ")
ext := "so"
args := append(gogccflags, "-shared")
switch goos {
case "darwin":
ext = "dylib"
args = append(args, "-undefined", "suppress", "-flat_namespace")
case "windows":
ext = "dll"
args = append(args, "-DEXPORT_DLL")
}
sofname := "libcgosotest." + ext
args = append(args, "-o", sofname, "cgoso_c.c")
if err := t.dirCmd(dir, cc, args).Run(); err != nil {
return err
}
defer os.Remove(filepath.Join(dir, sofname))
if err := t.dirCmd(dir, "go", "build", "-o", "main.exe", "main.go").Run(); err != nil {
return err
}
defer os.Remove(filepath.Join(dir, "main.exe"))
cmd := t.dirCmd(dir, "./main.exe")
if goos != "windows" {
s := "LD_LIBRARY_PATH"
if goos == "darwin" {
s = "DYLD_LIBRARY_PATH"
}
cmd.Env = append(os.Environ(), s+"=.")
// On FreeBSD 64-bit architectures, the 32-bit linker looks for
// different environment variables.
if goos == "freebsd" && gohostarch == "386" {
cmd.Env = append(cmd.Env, "LD_32_LIBRARY_PATH=.")
}
}
return cmd.Run()
}
func (t *tester) hasBash() bool {
switch gohostos {
case "windows", "plan9":
return false
}
return true
}
func (t *tester) hasCxx() bool {
cxx, _ := exec.LookPath(compilerEnvLookup(defaultcxx, goos, goarch))
return cxx != ""
}
func (t *tester) hasSwig() bool {
swig, err := exec.LookPath("swig")
if err != nil {
return false
}
// Check that swig was installed with Go support by checking
// that a go directory exists inside the swiglib directory.
// See https://golang.org/issue/23469.
output, err := exec.Command(swig, "-go", "-swiglib").Output()
if err != nil {
return false
}
swigDir := strings.TrimSpace(string(output))
_, err = os.Stat(filepath.Join(swigDir, "go"))
if err != nil {
return false
}
// Check that swig has a new enough version.
// See https://golang.org/issue/22858.
out, err := exec.Command(swig, "-version").CombinedOutput()
if err != nil {
return false
}
re := regexp.MustCompile(`[vV]ersion +([\d]+)([.][\d]+)?([.][\d]+)?`)
matches := re.FindSubmatch(out)
if matches == nil {
// Can't find version number; hope for the best.
return true
}
major, err := strconv.Atoi(string(matches[1]))
if err != nil {
// Can't find version number; hope for the best.
return true
}
if major < 3 {
return false
}
if major > 3 {
// 4.0 or later
return true
}
// We have SWIG version 3.x.
if len(matches[2]) > 0 {
minor, err := strconv.Atoi(string(matches[2][1:]))
if err != nil {
return true
}
if minor > 0 {
// 3.1 or later
return true
}
}
// We have SWIG version 3.0.x.
if len(matches[3]) > 0 {
patch, err := strconv.Atoi(string(matches[3][1:]))
if err != nil {
return true
}
if patch < 6 {
// Before 3.0.6.
return false
}
}
return true
}
func (t *tester) raceDetectorSupported() bool {
if gohostos != goos {
return false
}
if !t.cgoEnabled {
return false
}
if !raceDetectorSupported(goos, goarch) {
return false
}
// The race detector doesn't work on Alpine Linux:
// golang.org/issue/14481
if isAlpineLinux() {
return false
}
// NetBSD support is unfinished.
// golang.org/issue/26403
if goos == "netbsd" {
return false
}
return true
}
func isAlpineLinux() bool {
if runtime.GOOS != "linux" {
return false
}
fi, err := os.Lstat("/etc/alpine-release")
return err == nil && fi.Mode().IsRegular()
}
func (t *tester) runFlag(rx string) string {
if t.compileOnly {
return "-run=^$"
}
if rx == "" && goos == "js" && goarch == "wasm" {
return "-run=^Test" // exclude examples; Issue 25913
}
return "-run=" + rx
}
func (t *tester) raceTest(dt *distTest) error {
t.addCmd(dt, "src", t.goTest(), "-race", "-i", "runtime/race", "flag", "os", "os/exec")
t.addCmd(dt, "src", t.goTest(), "-race", t.runFlag("Output"), "runtime/race")
t.addCmd(dt, "src", t.goTest(), "-race", t.runFlag("TestParse|TestEcho|TestStdinCloseRace|TestClosedPipeRace|TestTypeRace|TestFdRace|TestFdReadRace|TestFileCloseRace"), "flag", "net", "os", "os/exec", "encoding/gob")
// We don't want the following line, because it
// slows down all.bash (by 10 seconds on my laptop).
// The race builder should catch any error here, but doesn't.
// TODO(iant): Figure out how to catch this.
// t.addCmd(dt, "src", t.goTest(), "-race", "-run=TestParallelTest", "cmd/go")
if t.cgoEnabled {
cmd := t.addCmd(dt, "misc/cgo/test", t.goTest(), "-race")
cmd.Env = append(os.Environ(), "GOTRACEBACK=2")
}
if t.extLink() {
// Test with external linking; see issue 9133.
t.addCmd(dt, "src", t.goTest(), "-race", "-ldflags=-linkmode=external", t.runFlag("TestParse|TestEcho|TestStdinCloseRace"), "flag", "os/exec")
}
return nil
}
var runtest struct {
sync.Once
exe string
err error
}
func (t *tester) testDirTest(dt *distTest, shard, shards int) error {
runtest.Do(func() {
const exe = "runtest.exe" // named exe for Windows, but harmless elsewhere
cmd := t.dirCmd("test", "go", "build", "-o", exe, "run.go")
cmd.Env = append(os.Environ(), "GOOS="+gohostos, "GOARCH="+gohostarch)
runtest.exe = filepath.Join(cmd.Dir, exe)
if err := cmd.Run(); err != nil {
runtest.err = err
return
}
xatexit(func() {
os.Remove(runtest.exe)
})
})
if runtest.err != nil {
return runtest.err
}
if t.compileOnly {
return nil
}
t.addCmd(dt, "test", runtest.exe,
fmt.Sprintf("--shard=%d", shard),
fmt.Sprintf("--shards=%d", shards),
)
return nil
}
// cgoPackages is the standard packages that use cgo.
var cgoPackages = []string{
"crypto/x509",
"net",
"os/user",
}
var funcBenchmark = []byte("\nfunc Benchmark")
// packageHasBenchmarks reports whether pkg has benchmarks.
// On any error, it conservatively returns true.
//
// This exists just to eliminate work on the builders, since compiling
// a test in race mode just to discover it has no benchmarks costs a
// second or two per package, and this function returns false for
// about 100 packages.
func (t *tester) packageHasBenchmarks(pkg string) bool {
pkgDir := filepath.Join(goroot, "src", pkg)
d, err := os.Open(pkgDir)
if err != nil {
return true // conservatively
}
defer d.Close()
names, err := d.Readdirnames(-1)
if err != nil {
return true // conservatively
}
for _, name := range names {
if !strings.HasSuffix(name, "_test.go") {
continue
}
slurp, err := ioutil.ReadFile(filepath.Join(pkgDir, name))
if err != nil {
return true // conservatively
}
if bytes.Contains(slurp, funcBenchmark) {
return true
}
}
return false
}
// raceDetectorSupported is a copy of the function
// cmd/internal/sys.RaceDetectorSupported, which can't be used here
// because cmd/dist has to be buildable by Go 1.4.
func raceDetectorSupported(goos, goarch string) bool {
switch goos {
case "linux":
return goarch == "amd64" || goarch == "ppc64le" || goarch == "arm64"
case "darwin", "freebsd", "netbsd", "windows":
return goarch == "amd64"
default:
return false
}
}
// mSanSupported is a copy of the function cmd/internal/sys.MSanSupported,
// which can't be used here because cmd/dist has to be buildable by Go 1.4.
func mSanSupported(goos, goarch string) bool {
switch goos {
case "linux":
return goarch == "amd64" || goarch == "arm64"
default:
return false
}
}