1 // Copyright 2012 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.
26 func TestMain(m *testing.M) {
28 for _, file := range toRemove {
37 target map[string]buildexe
40 type buildexe struct {
45 func runTestProg(t *testing.T, binary, name string, env ...string) string {
50 testenv.MustHaveGoBuild(t)
52 exe, err := buildTestProg(t, binary)
57 return runBuiltTestProg(t, exe, name, env...)
60 func runBuiltTestProg(t *testing.T, exe, name string, env ...string) string {
65 testenv.MustHaveGoBuild(t)
67 cmd := testenv.CleanCmdEnv(exec.Command(exe, name))
68 cmd.Env = append(cmd.Env, env...)
70 cmd.Env = append(cmd.Env, "RUNTIME_TEST_SHORT=1")
75 if err := cmd.Start(); err != nil {
76 t.Fatalf("starting %s %s: %v", exe, name, err)
79 // If the process doesn't complete within 1 minute,
80 // assume it is hanging and kill it to get a stack trace.
82 done := make(chan bool)
85 // This GOARCH/GOOS test is copied from cmd/dist/test.go.
86 // TODO(iant): Have cmd/dist update the environment variable.
87 if runtime.GOARCH == "arm" || runtime.GOOS == "windows" {
90 if s := os.Getenv("GO_TEST_TIMEOUT_SCALE"); s != "" {
91 if sc, err := strconv.Atoi(s); err == nil {
98 case <-time.After(time.Duration(scale) * time.Minute):
103 if err := cmd.Wait(); err != nil {
104 t.Logf("%s %s exit status: %v", exe, name, err)
111 func buildTestProg(t *testing.T, binary string, flags ...string) (string, error) {
117 defer testprog.Unlock()
118 if testprog.dir == "" {
119 dir, err := os.MkdirTemp("", "go-build")
121 t.Fatalf("failed to create temp directory: %v", err)
124 toRemove = append(toRemove, dir)
127 if testprog.target == nil {
128 testprog.target = make(map[string]buildexe)
132 name += "_" + strings.Join(flags, "_")
134 target, ok := testprog.target[name]
136 return target.exe, target.err
139 exe := filepath.Join(testprog.dir, name+".exe")
140 cmd := exec.Command(testenv.GoToolPath(t), append([]string{"build", "-o", exe}, flags...)...)
141 cmd.Dir = "testdata/" + binary
142 out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
144 target.err = fmt.Errorf("building %s %v: %v\n%s", binary, flags, err, out)
145 testprog.target[name] = target
146 return "", target.err
149 testprog.target[name] = target
153 func TestVDSO(t *testing.T) {
155 output := runTestProg(t, "testprog", "SignalInVDSO")
158 t.Fatalf("output:\n%s\n\nwanted:\n%s", output, want)
162 func testCrashHandler(t *testing.T, cgo bool) {
163 type crashTest struct {
168 output = runTestProg(t, "testprogcgo", "Crash")
170 output = runTestProg(t, "testprog", "Crash")
172 want := "main: recovered done\nnew-thread: recovered done\nsecond-new-thread: recovered done\nmain-again: recovered done\n"
174 t.Fatalf("output:\n%s\n\nwanted:\n%s", output, want)
178 func TestCrashHandler(t *testing.T) {
179 testCrashHandler(t, false)
182 func testDeadlock(t *testing.T, name string) {
183 // External linking brings in cgo, causing deadlock detection not working.
184 testenv.MustInternalLink(t)
186 output := runTestProg(t, "testprog", name)
187 want := "fatal error: all goroutines are asleep - deadlock!\n"
188 if !strings.HasPrefix(output, want) {
189 t.Fatalf("output does not start with %q:\n%s", want, output)
193 func TestSimpleDeadlock(t *testing.T) {
194 testDeadlock(t, "SimpleDeadlock")
197 func TestInitDeadlock(t *testing.T) {
198 testDeadlock(t, "InitDeadlock")
201 func TestLockedDeadlock(t *testing.T) {
202 testDeadlock(t, "LockedDeadlock")
205 func TestLockedDeadlock2(t *testing.T) {
206 testDeadlock(t, "LockedDeadlock2")
209 func TestGoexitDeadlock(t *testing.T) {
210 // External linking brings in cgo, causing deadlock detection not working.
211 testenv.MustInternalLink(t)
213 output := runTestProg(t, "testprog", "GoexitDeadlock")
214 want := "no goroutines (main called runtime.Goexit) - deadlock!"
215 if !strings.Contains(output, want) {
216 t.Fatalf("output:\n%s\n\nwant output containing: %s", output, want)
220 func TestStackOverflow(t *testing.T) {
221 output := runTestProg(t, "testprog", "StackOverflow")
223 "runtime: goroutine stack exceeds 1474560-byte limit\n",
224 "fatal error: stack overflow",
225 // information about the current SP and stack bounds
229 if !strings.HasPrefix(output, want[0]) {
230 t.Errorf("output does not start with %q", want[0])
232 for _, s := range want[1:] {
233 if !strings.Contains(output, s) {
234 t.Errorf("output does not contain %q", s)
238 t.Logf("output:\n%s", output)
242 func TestThreadExhaustion(t *testing.T) {
243 output := runTestProg(t, "testprog", "ThreadExhaustion")
244 want := "runtime: program exceeds 10-thread limit\nfatal error: thread exhaustion"
245 if !strings.HasPrefix(output, want) {
246 t.Fatalf("output does not start with %q:\n%s", want, output)
250 func TestRecursivePanic(t *testing.T) {
251 output := runTestProg(t, "testprog", "RecursivePanic")
256 if !strings.HasPrefix(output, want) {
257 t.Fatalf("output does not start with %q:\n%s", want, output)
262 func TestRecursivePanic2(t *testing.T) {
263 output := runTestProg(t, "testprog", "RecursivePanic2")
269 if !strings.HasPrefix(output, want) {
270 t.Fatalf("output does not start with %q:\n%s", want, output)
275 func TestRecursivePanic3(t *testing.T) {
276 output := runTestProg(t, "testprog", "RecursivePanic3")
277 want := `panic: first panic
280 if !strings.HasPrefix(output, want) {
281 t.Fatalf("output does not start with %q:\n%s", want, output)
286 func TestRecursivePanic4(t *testing.T) {
287 output := runTestProg(t, "testprog", "RecursivePanic4")
288 want := `panic: first panic [recovered]
291 if !strings.HasPrefix(output, want) {
292 t.Fatalf("output does not start with %q:\n%s", want, output)
297 func TestGoexitCrash(t *testing.T) {
298 // External linking brings in cgo, causing deadlock detection not working.
299 testenv.MustInternalLink(t)
301 output := runTestProg(t, "testprog", "GoexitExit")
302 want := "no goroutines (main called runtime.Goexit) - deadlock!"
303 if !strings.Contains(output, want) {
304 t.Fatalf("output:\n%s\n\nwant output containing: %s", output, want)
308 func TestGoexitDefer(t *testing.T) {
309 c := make(chan struct{})
314 t.Errorf("non-nil recover during Goexit")
320 // Note: if the defer fails to run, we will get a deadlock here
324 func TestGoNil(t *testing.T) {
325 output := runTestProg(t, "testprog", "GoNil")
326 want := "go of nil func value"
327 if !strings.Contains(output, want) {
328 t.Fatalf("output:\n%s\n\nwant output containing: %s", output, want)
332 func TestMainGoroutineID(t *testing.T) {
333 output := runTestProg(t, "testprog", "MainGoroutineID")
334 want := "panic: test\n\ngoroutine 1 [running]:\n"
335 if !strings.HasPrefix(output, want) {
336 t.Fatalf("output does not start with %q:\n%s", want, output)
340 func TestNoHelperGoroutines(t *testing.T) {
341 output := runTestProg(t, "testprog", "NoHelperGoroutines")
342 matches := regexp.MustCompile(`goroutine [0-9]+ \[`).FindAllStringSubmatch(output, -1)
343 if len(matches) != 1 || matches[0][0] != "goroutine 1 [" {
344 t.Fatalf("want to see only goroutine 1, see:\n%s", output)
348 func TestBreakpoint(t *testing.T) {
349 output := runTestProg(t, "testprog", "Breakpoint")
350 // If runtime.Breakpoint() is inlined, then the stack trace prints
351 // "runtime.Breakpoint(...)" instead of "runtime.Breakpoint()".
352 want := "runtime.Breakpoint("
353 if !strings.Contains(output, want) {
354 t.Fatalf("output:\n%s\n\nwant output containing: %s", output, want)
358 func TestGoexitInPanic(t *testing.T) {
359 // External linking brings in cgo, causing deadlock detection not working.
360 testenv.MustInternalLink(t)
362 // see issue 8774: this code used to trigger an infinite recursion
363 output := runTestProg(t, "testprog", "GoexitInPanic")
364 want := "fatal error: no goroutines (main called runtime.Goexit) - deadlock!"
365 if !strings.HasPrefix(output, want) {
366 t.Fatalf("output does not start with %q:\n%s", want, output)
370 // Issue 14965: Runtime panics should be of type runtime.Error
371 func TestRuntimePanicWithRuntimeError(t *testing.T) {
372 testCases := [...]func(){
374 var m map[uint64]bool
378 ch := make(chan struct{})
383 var ch = make(chan struct{})
388 var s = make([]int, 2)
393 _ = make(chan bool, n)
396 close((chan bool)(nil))
400 for i, fn := range testCases {
401 got := panicValue(fn)
402 if _, ok := got.(runtime.Error); !ok {
403 t.Errorf("test #%d: recovered value %v(type %T) does not implement runtime.Error", i, got, got)
408 func panicValue(fn func()) (recovered interface{}) {
410 recovered = recover()
416 func TestPanicAfterGoexit(t *testing.T) {
417 // an uncaught panic should still work after goexit
418 output := runTestProg(t, "testprog", "PanicAfterGoexit")
419 want := "panic: hello"
420 if !strings.HasPrefix(output, want) {
421 t.Fatalf("output does not start with %q:\n%s", want, output)
425 func TestRecoveredPanicAfterGoexit(t *testing.T) {
426 // External linking brings in cgo, causing deadlock detection not working.
427 testenv.MustInternalLink(t)
429 output := runTestProg(t, "testprog", "RecoveredPanicAfterGoexit")
430 want := "fatal error: no goroutines (main called runtime.Goexit) - deadlock!"
431 if !strings.HasPrefix(output, want) {
432 t.Fatalf("output does not start with %q:\n%s", want, output)
436 func TestRecoverBeforePanicAfterGoexit(t *testing.T) {
437 // External linking brings in cgo, causing deadlock detection not working.
438 testenv.MustInternalLink(t)
441 output := runTestProg(t, "testprog", "RecoverBeforePanicAfterGoexit")
442 want := "fatal error: no goroutines (main called runtime.Goexit) - deadlock!"
443 if !strings.HasPrefix(output, want) {
444 t.Fatalf("output does not start with %q:\n%s", want, output)
448 func TestRecoverBeforePanicAfterGoexit2(t *testing.T) {
449 // External linking brings in cgo, causing deadlock detection not working.
450 testenv.MustInternalLink(t)
453 output := runTestProg(t, "testprog", "RecoverBeforePanicAfterGoexit2")
454 want := "fatal error: no goroutines (main called runtime.Goexit) - deadlock!"
455 if !strings.HasPrefix(output, want) {
456 t.Fatalf("output does not start with %q:\n%s", want, output)
460 func TestNetpollDeadlock(t *testing.T) {
461 if os.Getenv("GO_BUILDER_NAME") == "darwin-amd64-10_12" {
462 // A suspected kernel bug in macOS 10.12 occasionally results in
463 // an apparent deadlock when dialing localhost. The errors have not
464 // been observed on newer versions of the OS, so we don't plan to work
465 // around them. See https://golang.org/issue/22019.
466 testenv.SkipFlaky(t, 22019)
470 output := runTestProg(t, "testprognet", "NetpollDeadlock")
472 if !strings.HasSuffix(output, want) {
473 t.Fatalf("output does not start with %q:\n%s", want, output)
477 func TestPanicTraceback(t *testing.T) {
479 output := runTestProg(t, "testprog", "PanicTraceback")
480 want := "panic: hello\n\tpanic: panic pt2\n\tpanic: panic pt1\n"
481 if !strings.HasPrefix(output, want) {
482 t.Fatalf("output does not start with %q:\n%s", want, output)
485 // Check functions in the traceback.
486 fns := []string{"main.pt1.func1", "panic", "main.pt2.func1", "panic", "main.pt2", "main.pt1"}
487 for _, fn := range fns {
488 re := regexp.MustCompile(`(?m)^` + regexp.QuoteMeta(fn) + `\(.*\n`)
489 idx := re.FindStringIndex(output)
491 t.Fatalf("expected %q function in traceback:\n%s", fn, output)
493 output = output[idx[1]:]
497 func testPanicDeadlock(t *testing.T, name string, want string) {
499 output := runTestProg(t, "testprog", name)
500 if !strings.HasPrefix(output, want) {
501 t.Fatalf("output does not start with %q:\n%s", want, output)
505 func TestPanicDeadlockGosched(t *testing.T) {
506 testPanicDeadlock(t, "GoschedInPanic", "panic: errorThatGosched\n\n")
509 func TestPanicDeadlockSyscall(t *testing.T) {
510 testPanicDeadlock(t, "SyscallInPanic", "1\n2\npanic: 3\n\n")
513 func TestPanicLoop(t *testing.T) {
514 output := runTestProg(t, "testprog", "PanicLoop")
515 if want := "panic while printing panic value"; !strings.Contains(output, want) {
516 t.Errorf("output does not contain %q:\n%s", want, output)
520 func TestMemPprof(t *testing.T) {
521 testenv.MustHaveGoRun(t)
523 exe, err := buildTestProg(t, "testprog")
528 got, err := testenv.CleanCmdEnv(exec.Command(exe, "MemProf")).CombinedOutput()
532 fn := strings.TrimSpace(string(got))
535 for try := 0; try < 2; try++ {
536 cmd := testenv.CleanCmdEnv(exec.Command(testenv.GoToolPath(t), "tool", "pprof", "-alloc_space", "-top"))
537 // Check that pprof works both with and without explicit executable on command line.
539 cmd.Args = append(cmd.Args, exe, fn)
541 cmd.Args = append(cmd.Args, fn)
544 for i, e := range cmd.Env {
545 if strings.HasPrefix(e, "PPROF_TMPDIR=") {
546 cmd.Env[i] = "PPROF_TMPDIR=" + os.TempDir()
552 cmd.Env = append(cmd.Env, "PPROF_TMPDIR="+os.TempDir())
555 top, err := cmd.CombinedOutput()
556 t.Logf("%s:\n%s", cmd.Args, top)
559 } else if !bytes.Contains(top, []byte("MemProf")) {
560 t.Error("missing MemProf in pprof output")
565 var concurrentMapTest = flag.Bool("run_concurrent_map_tests", false, "also run flaky concurrent map tests")
567 func TestConcurrentMapWrites(t *testing.T) {
568 if !*concurrentMapTest {
569 t.Skip("skipping without -run_concurrent_map_tests")
571 testenv.MustHaveGoRun(t)
572 output := runTestProg(t, "testprog", "concurrentMapWrites")
573 want := "fatal error: concurrent map writes"
574 if !strings.HasPrefix(output, want) {
575 t.Fatalf("output does not start with %q:\n%s", want, output)
578 func TestConcurrentMapReadWrite(t *testing.T) {
579 if !*concurrentMapTest {
580 t.Skip("skipping without -run_concurrent_map_tests")
582 testenv.MustHaveGoRun(t)
583 output := runTestProg(t, "testprog", "concurrentMapReadWrite")
584 want := "fatal error: concurrent map read and map write"
585 if !strings.HasPrefix(output, want) {
586 t.Fatalf("output does not start with %q:\n%s", want, output)
589 func TestConcurrentMapIterateWrite(t *testing.T) {
590 if !*concurrentMapTest {
591 t.Skip("skipping without -run_concurrent_map_tests")
593 testenv.MustHaveGoRun(t)
594 output := runTestProg(t, "testprog", "concurrentMapIterateWrite")
595 want := "fatal error: concurrent map iteration and map write"
596 if !strings.HasPrefix(output, want) {
597 t.Fatalf("output does not start with %q:\n%s", want, output)
605 func (p *point) negate() {
610 // Test for issue #10152.
611 func TestPanicInlined(t *testing.T) {
615 t.Fatalf("recover failed")
617 buf := make([]byte, 2048)
618 n := runtime.Stack(buf, false)
620 if !bytes.Contains(buf, []byte("(*point).negate(")) {
621 t.Fatalf("expecting stack trace to contain call to (*point).negate()")
629 // Test for issues #3934 and #20018.
630 // We want to delay exiting until a panic print is complete.
631 func TestPanicRace(t *testing.T) {
632 testenv.MustHaveGoRun(t)
634 exe, err := buildTestProg(t, "testprog")
639 // The test is intentionally racy, and in my testing does not
640 // produce the expected output about 0.05% of the time.
641 // So run the program in a loop and only fail the test if we
642 // get the wrong output ten times in a row.
645 for i := 0; i < tries; i++ {
646 got, err := testenv.CleanCmdEnv(exec.Command(exe, "PanicRace")).CombinedOutput()
648 t.Logf("try %d: program exited successfully, should have failed", i+1)
653 t.Logf("try %d:\n", i+1)
662 for _, want := range wants {
663 if !bytes.Contains(got, []byte(want)) {
664 t.Logf("did not find expected string %q", want)
669 // Test generated expected output.
672 t.Errorf("test ran %d times without producing expected output", tries)
675 func TestBadTraceback(t *testing.T) {
676 output := runTestProg(t, "testprog", "BadTraceback")
677 for _, want := range []string{
678 "runtime: unexpected return pc",
680 "00000bad", // Smashed LR in hex dump
681 "<main.badLR", // Symbolization in hex dump (badLR1 or badLR2)
683 if !strings.Contains(output, want) {
684 t.Errorf("output does not contain %q:\n%s", want, output)
689 func TestTimePprof(t *testing.T) {
690 // Pass GOTRACEBACK for issue #41120 to try to get more
691 // information on timeout.
692 fn := runTestProg(t, "testprog", "TimeProf", "GOTRACEBACK=crash")
693 fn = strings.TrimSpace(fn)
696 cmd := testenv.CleanCmdEnv(exec.Command(testenv.GoToolPath(t), "tool", "pprof", "-top", "-nodecount=1", fn))
697 cmd.Env = append(cmd.Env, "PPROF_TMPDIR="+os.TempDir())
698 top, err := cmd.CombinedOutput()
702 } else if bytes.Contains(top, []byte("ExternalCode")) {
703 t.Error("profiler refers to ExternalCode")
707 // Test that runtime.abort does so.
708 func TestAbort(t *testing.T) {
709 // Pass GOTRACEBACK to ensure we get runtime frames.
710 output := runTestProg(t, "testprog", "Abort", "GOTRACEBACK=system")
711 if want := "runtime.abort"; !strings.Contains(output, want) {
712 t.Errorf("output does not contain %q:\n%s", want, output)
714 if strings.Contains(output, "BAD") {
715 t.Errorf("output contains BAD:\n%s", output)
717 // Check that it's a signal traceback.
719 // For systems that use a breakpoint, check specifically for that.
720 switch runtime.GOARCH {
722 switch runtime.GOOS {
724 want = "sys: breakpoint"
726 want = "Exception 0x80000003"
731 if !strings.Contains(output, want) {
732 t.Errorf("output does not contain %q:\n%s", want, output)
736 // For TestRuntimePanic: test a panic in the runtime package without
737 // involving the testing harness.
739 if os.Getenv("GO_TEST_RUNTIME_PANIC") == "1" {
741 if r := recover(); r != nil {
742 // We expect to crash, so exit 0
743 // to indicate failure.
747 runtime.PanicForTesting(nil, 1)
748 // We expect to crash, so exit 0 to indicate failure.
753 func TestRuntimePanic(t *testing.T) {
754 testenv.MustHaveExec(t)
755 cmd := testenv.CleanCmdEnv(exec.Command(os.Args[0], "-test.run=TestRuntimePanic"))
756 cmd.Env = append(cmd.Env, "GO_TEST_RUNTIME_PANIC=1")
757 out, err := cmd.CombinedOutput()
760 t.Error("child process did not fail")
761 } else if want := "runtime.unexportedPanicForTesting"; !bytes.Contains(out, []byte(want)) {
762 t.Errorf("output did not contain expected string %q", want)
766 // Test that g0 stack overflows are handled gracefully.
767 func TestG0StackOverflow(t *testing.T) {
768 testenv.MustHaveExec(t)
770 switch runtime.GOOS {
771 case "darwin", "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "android":
772 t.Skipf("g0 stack is wrong on pthread platforms (see golang.org/issue/26061)")
775 if os.Getenv("TEST_G0_STACK_OVERFLOW") != "1" {
776 cmd := testenv.CleanCmdEnv(exec.Command(os.Args[0], "-test.run=TestG0StackOverflow", "-test.v"))
777 cmd.Env = append(cmd.Env, "TEST_G0_STACK_OVERFLOW=1")
778 out, err := cmd.CombinedOutput()
779 // Don't check err since it's expected to crash.
780 if n := strings.Count(string(out), "morestack on g0\n"); n != 1 {
781 t.Fatalf("%s\n(exit status %v)", out, err)
783 // Check that it's a signal-style traceback.
784 if runtime.GOOS != "windows" {
785 if want := "PC="; !strings.Contains(string(out), want) {
786 t.Errorf("output does not contain %q:\n%s", want, out)
792 runtime.G0StackOverflow()
795 // Test that panic message is not clobbered.
797 func TestDoublePanic(t *testing.T) {
798 output := runTestProg(t, "testprog", "DoublePanic", "GODEBUG=clobberfree=1")
799 wants := []string{"panic: XXX", "panic: YYY"}
800 for _, want := range wants {
801 if !strings.Contains(output, want) {
802 t.Errorf("output:\n%s\n\nwant output containing: %s", output, want)