Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 872 insertions, 0 deletions

diff --git a/src/runtime/crash_cgo_test.go b/src/runtime/crash_cgo_test.go
new file mode 100644
index 0000000..424aedb
--- /dev/null
+++ b/src/runtime/crash_cgo_test.go
@@ -0,0 +1,872 @@
+// Copyright 2012 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.
+
+//go:build cgo
+
+package runtime_test
+
+import (
+	"fmt"
+	"internal/goos"
+	"internal/platform"
+	"internal/testenv"
+	"os"
+	"os/exec"
+	"runtime"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestCgoCrashHandler(t *testing.T) {
+	t.Parallel()
+	testCrashHandler(t, true)
+}
+
+func TestCgoSignalDeadlock(t *testing.T) {
+	// Don't call t.Parallel, since too much work going on at the
+	// same time can cause the testprogcgo code to overrun its
+	// timeouts (issue #18598).
+
+	if testing.Short() && runtime.GOOS == "windows" {
+		t.Skip("Skipping in short mode") // takes up to 64 seconds
+	}
+	got := runTestProg(t, "testprogcgo", "CgoSignalDeadlock")
+	want := "OK\n"
+	if got != want {
+		t.Fatalf("expected %q, but got:\n%s", want, got)
+	}
+}
+
+func TestCgoTraceback(t *testing.T) {
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "CgoTraceback")
+	want := "OK\n"
+	if got != want {
+		t.Fatalf("expected %q, but got:\n%s", want, got)
+	}
+}
+
+func TestCgoCallbackGC(t *testing.T) {
+	t.Parallel()
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no pthreads on %s", runtime.GOOS)
+	}
+	if testing.Short() {
+		switch {
+		case runtime.GOOS == "dragonfly":
+			t.Skip("see golang.org/issue/11990")
+		case runtime.GOOS == "linux" && runtime.GOARCH == "arm":
+			t.Skip("too slow for arm builders")
+		case runtime.GOOS == "linux" && (runtime.GOARCH == "mips64" || runtime.GOARCH == "mips64le"):
+			t.Skip("too slow for mips64x builders")
+		}
+	}
+	if testenv.Builder() == "darwin-amd64-10_14" {
+		// TODO(#23011): When the 10.14 builders are gone, remove this skip.
+		t.Skip("skipping due to platform bug on macOS 10.14; see https://golang.org/issue/43926")
+	}
+	got := runTestProg(t, "testprogcgo", "CgoCallbackGC")
+	want := "OK\n"
+	if got != want {
+		t.Fatalf("expected %q, but got:\n%s", want, got)
+	}
+}
+
+func TestCgoExternalThreadPanic(t *testing.T) {
+	t.Parallel()
+	if runtime.GOOS == "plan9" {
+		t.Skipf("no pthreads on %s", runtime.GOOS)
+	}
+	got := runTestProg(t, "testprogcgo", "CgoExternalThreadPanic")
+	want := "panic: BOOM"
+	if !strings.Contains(got, want) {
+		t.Fatalf("want failure containing %q. output:\n%s\n", want, got)
+	}
+}
+
+func TestCgoExternalThreadSIGPROF(t *testing.T) {
+	t.Parallel()
+	// issue 9456.
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no pthreads on %s", runtime.GOOS)
+	}
+
+	got := runTestProg(t, "testprogcgo", "CgoExternalThreadSIGPROF", "GO_START_SIGPROF_THREAD=1")
+	if want := "OK\n"; got != want {
+		t.Fatalf("expected %q, but got:\n%s", want, got)
+	}
+}
+
+func TestCgoExternalThreadSignal(t *testing.T) {
+	t.Parallel()
+	// issue 10139
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no pthreads on %s", runtime.GOOS)
+	}
+
+	got := runTestProg(t, "testprogcgo", "CgoExternalThreadSignal")
+	if want := "OK\n"; got != want {
+		if runtime.GOOS == "ios" && strings.Contains(got, "C signal did not crash as expected") {
+			testenv.SkipFlaky(t, 59913)
+		}
+		t.Fatalf("expected %q, but got:\n%s", want, got)
+	}
+}
+
+func TestCgoDLLImports(t *testing.T) {
+	// test issue 9356
+	if runtime.GOOS != "windows" {
+		t.Skip("skipping windows specific test")
+	}
+	got := runTestProg(t, "testprogcgo", "CgoDLLImportsMain")
+	want := "OK\n"
+	if got != want {
+		t.Fatalf("expected %q, but got %v", want, got)
+	}
+}
+
+func TestCgoExecSignalMask(t *testing.T) {
+	t.Parallel()
+	// Test issue 13164.
+	switch runtime.GOOS {
+	case "windows", "plan9":
+		t.Skipf("skipping signal mask test on %s", runtime.GOOS)
+	}
+	got := runTestProg(t, "testprogcgo", "CgoExecSignalMask", "GOTRACEBACK=system")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q, got %v", want, got)
+	}
+}
+
+func TestEnsureDropM(t *testing.T) {
+	t.Parallel()
+	// Test for issue 13881.
+	switch runtime.GOOS {
+	case "windows", "plan9":
+		t.Skipf("skipping dropm test on %s", runtime.GOOS)
+	}
+	got := runTestProg(t, "testprogcgo", "EnsureDropM")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q, got %v", want, got)
+	}
+}
+
+// Test for issue 14387.
+// Test that the program that doesn't need any cgo pointer checking
+// takes about the same amount of time with it as without it.
+func TestCgoCheckBytes(t *testing.T) {
+	t.Parallel()
+	// Make sure we don't count the build time as part of the run time.
+	testenv.MustHaveGoBuild(t)
+	exe, err := buildTestProg(t, "testprogcgo")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Try it 10 times to avoid flakiness.
+	const tries = 10
+	var tot1, tot2 time.Duration
+	for i := 0; i < tries; i++ {
+		cmd := testenv.CleanCmdEnv(exec.Command(exe, "CgoCheckBytes"))
+		cmd.Env = append(cmd.Env, "GODEBUG=cgocheck=0", fmt.Sprintf("GO_CGOCHECKBYTES_TRY=%d", i))
+
+		start := time.Now()
+		cmd.Run()
+		d1 := time.Since(start)
+
+		cmd = testenv.CleanCmdEnv(exec.Command(exe, "CgoCheckBytes"))
+		cmd.Env = append(cmd.Env, fmt.Sprintf("GO_CGOCHECKBYTES_TRY=%d", i))
+
+		start = time.Now()
+		cmd.Run()
+		d2 := time.Since(start)
+
+		if d1*20 > d2 {
+			// The slow version (d2) was less than 20 times
+			// slower than the fast version (d1), so OK.
+			return
+		}
+
+		tot1 += d1
+		tot2 += d2
+	}
+
+	t.Errorf("cgo check too slow: got %v, expected at most %v", tot2/tries, (tot1/tries)*20)
+}
+
+func TestCgoPanicDeadlock(t *testing.T) {
+	t.Parallel()
+	// test issue 14432
+	got := runTestProg(t, "testprogcgo", "CgoPanicDeadlock")
+	want := "panic: cgo error\n\n"
+	if !strings.HasPrefix(got, want) {
+		t.Fatalf("output does not start with %q:\n%s", want, got)
+	}
+}
+
+func TestCgoCCodeSIGPROF(t *testing.T) {
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "CgoCCodeSIGPROF")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q got %v", want, got)
+	}
+}
+
+func TestCgoPprofCallback(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping in short mode") // takes a full second
+	}
+	switch runtime.GOOS {
+	case "windows", "plan9":
+		t.Skipf("skipping cgo pprof callback test on %s", runtime.GOOS)
+	}
+	got := runTestProg(t, "testprogcgo", "CgoPprofCallback")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q got %v", want, got)
+	}
+}
+
+func TestCgoCrashTraceback(t *testing.T) {
+	t.Parallel()
+	switch platform := runtime.GOOS + "/" + runtime.GOARCH; platform {
+	case "darwin/amd64":
+	case "linux/amd64":
+	case "linux/arm64":
+	case "linux/ppc64le":
+	default:
+		t.Skipf("not yet supported on %s", platform)
+	}
+	got := runTestProg(t, "testprogcgo", "CrashTraceback")
+	for i := 1; i <= 3; i++ {
+		if !strings.Contains(got, fmt.Sprintf("cgo symbolizer:%d", i)) {
+			t.Errorf("missing cgo symbolizer:%d", i)
+		}
+	}
+}
+
+func TestCgoCrashTracebackGo(t *testing.T) {
+	t.Parallel()
+	switch platform := runtime.GOOS + "/" + runtime.GOARCH; platform {
+	case "darwin/amd64":
+	case "linux/amd64":
+	case "linux/arm64":
+	case "linux/ppc64le":
+	default:
+		t.Skipf("not yet supported on %s", platform)
+	}
+	got := runTestProg(t, "testprogcgo", "CrashTracebackGo")
+	for i := 1; i <= 3; i++ {
+		want := fmt.Sprintf("main.h%d", i)
+		if !strings.Contains(got, want) {
+			t.Errorf("missing %s", want)
+		}
+	}
+}
+
+func TestCgoTracebackContext(t *testing.T) {
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "TracebackContext")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q got %v", want, got)
+	}
+}
+
+func TestCgoTracebackContextPreemption(t *testing.T) {
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "TracebackContextPreemption")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q got %v", want, got)
+	}
+}
+
+func testCgoPprof(t *testing.T, buildArg, runArg, top, bottom string) {
+	t.Parallel()
+	if runtime.GOOS != "linux" || (runtime.GOARCH != "amd64" && runtime.GOARCH != "ppc64le" && runtime.GOARCH != "arm64") {
+		t.Skipf("not yet supported on %s/%s", runtime.GOOS, runtime.GOARCH)
+	}
+	testenv.MustHaveGoRun(t)
+
+	exe, err := buildTestProg(t, "testprogcgo", buildArg)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cmd := testenv.CleanCmdEnv(exec.Command(exe, runArg))
+	got, err := cmd.CombinedOutput()
+	if err != nil {
+		if testenv.Builder() == "linux-amd64-alpine" {
+			// See Issue 18243 and Issue 19938.
+			t.Skipf("Skipping failing test on Alpine (golang.org/issue/18243). Ignoring error: %v", err)
+		}
+		t.Fatalf("%s\n\n%v", got, err)
+	}
+	fn := strings.TrimSpace(string(got))
+	defer os.Remove(fn)
+
+	for try := 0; try < 2; try++ {
+		cmd := testenv.CleanCmdEnv(exec.Command(testenv.GoToolPath(t), "tool", "pprof", "-tagignore=ignore", "-traces"))
+		// Check that pprof works both with and without explicit executable on command line.
+		if try == 0 {
+			cmd.Args = append(cmd.Args, exe, fn)
+		} else {
+			cmd.Args = append(cmd.Args, fn)
+		}
+
+		found := false
+		for i, e := range cmd.Env {
+			if strings.HasPrefix(e, "PPROF_TMPDIR=") {
+				cmd.Env[i] = "PPROF_TMPDIR=" + os.TempDir()
+				found = true
+				break
+			}
+		}
+		if !found {
+			cmd.Env = append(cmd.Env, "PPROF_TMPDIR="+os.TempDir())
+		}
+
+		out, err := cmd.CombinedOutput()
+		t.Logf("%s:\n%s", cmd.Args, out)
+		if err != nil {
+			t.Error(err)
+			continue
+		}
+
+		trace := findTrace(string(out), top)
+		if len(trace) == 0 {
+			t.Errorf("%s traceback missing.", top)
+			continue
+		}
+		if trace[len(trace)-1] != bottom {
+			t.Errorf("invalid traceback origin: got=%v; want=[%s ... %s]", trace, top, bottom)
+		}
+	}
+}
+
+func TestCgoPprof(t *testing.T) {
+	testCgoPprof(t, "", "CgoPprof", "cpuHog", "runtime.main")
+}
+
+func TestCgoPprofPIE(t *testing.T) {
+	testCgoPprof(t, "-buildmode=pie", "CgoPprof", "cpuHog", "runtime.main")
+}
+
+func TestCgoPprofThread(t *testing.T) {
+	testCgoPprof(t, "", "CgoPprofThread", "cpuHogThread", "cpuHogThread2")
+}
+
+func TestCgoPprofThreadNoTraceback(t *testing.T) {
+	testCgoPprof(t, "", "CgoPprofThreadNoTraceback", "cpuHogThread", "runtime._ExternalCode")
+}
+
+func TestRaceProf(t *testing.T) {
+	if !platform.RaceDetectorSupported(runtime.GOOS, runtime.GOARCH) {
+		t.Skipf("skipping on %s/%s because race detector not supported", runtime.GOOS, runtime.GOARCH)
+	}
+	if runtime.GOOS == "windows" {
+		t.Skipf("skipping: test requires pthread support")
+		// TODO: Can this test be rewritten to use the C11 thread API instead?
+	}
+
+	testenv.MustHaveGoRun(t)
+
+	// This test requires building various packages with -race, so
+	// it's somewhat slow.
+	if testing.Short() {
+		t.Skip("skipping test in -short mode")
+	}
+
+	exe, err := buildTestProg(t, "testprogcgo", "-race")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	got, err := testenv.CleanCmdEnv(exec.Command(exe, "CgoRaceprof")).CombinedOutput()
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := "OK\n"
+	if string(got) != want {
+		t.Errorf("expected %q got %s", want, got)
+	}
+}
+
+func TestRaceSignal(t *testing.T) {
+	if !platform.RaceDetectorSupported(runtime.GOOS, runtime.GOARCH) {
+		t.Skipf("skipping on %s/%s because race detector not supported", runtime.GOOS, runtime.GOARCH)
+	}
+	if runtime.GOOS == "windows" {
+		t.Skipf("skipping: test requires pthread support")
+		// TODO: Can this test be rewritten to use the C11 thread API instead?
+	}
+	if runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
+		testenv.SkipFlaky(t, 60316)
+	}
+
+	t.Parallel()
+
+	testenv.MustHaveGoRun(t)
+
+	// This test requires building various packages with -race, so
+	// it's somewhat slow.
+	if testing.Short() {
+		t.Skip("skipping test in -short mode")
+	}
+
+	exe, err := buildTestProg(t, "testprogcgo", "-race")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	got, err := testenv.CleanCmdEnv(testenv.Command(t, exe, "CgoRaceSignal")).CombinedOutput()
+	if err != nil {
+		t.Logf("%s\n", got)
+		t.Fatal(err)
+	}
+	want := "OK\n"
+	if string(got) != want {
+		t.Errorf("expected %q got %s", want, got)
+	}
+}
+
+func TestCgoNumGoroutine(t *testing.T) {
+	switch runtime.GOOS {
+	case "windows", "plan9":
+		t.Skipf("skipping numgoroutine test on %s", runtime.GOOS)
+	}
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "NumGoroutine")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q got %v", want, got)
+	}
+}
+
+func TestCatchPanic(t *testing.T) {
+	t.Parallel()
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no signals on %s", runtime.GOOS)
+	case "darwin":
+		if runtime.GOARCH == "amd64" {
+			t.Skipf("crash() on darwin/amd64 doesn't raise SIGABRT")
+		}
+	}
+
+	testenv.MustHaveGoRun(t)
+
+	exe, err := buildTestProg(t, "testprogcgo")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for _, early := range []bool{true, false} {
+		cmd := testenv.CleanCmdEnv(exec.Command(exe, "CgoCatchPanic"))
+		// Make sure a panic results in a crash.
+		cmd.Env = append(cmd.Env, "GOTRACEBACK=crash")
+		if early {
+			// Tell testprogcgo to install an early signal handler for SIGABRT
+			cmd.Env = append(cmd.Env, "CGOCATCHPANIC_EARLY_HANDLER=1")
+		}
+		if out, err := cmd.CombinedOutput(); err != nil {
+			t.Errorf("testprogcgo CgoCatchPanic failed: %v\n%s", err, out)
+		}
+	}
+}
+
+func TestCgoLockOSThreadExit(t *testing.T) {
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no pthreads on %s", runtime.GOOS)
+	}
+	t.Parallel()
+	testLockOSThreadExit(t, "testprogcgo")
+}
+
+func TestWindowsStackMemoryCgo(t *testing.T) {
+	if runtime.GOOS != "windows" {
+		t.Skip("skipping windows specific test")
+	}
+	testenv.SkipFlaky(t, 22575)
+	o := runTestProg(t, "testprogcgo", "StackMemory")
+	stackUsage, err := strconv.Atoi(o)
+	if err != nil {
+		t.Fatalf("Failed to read stack usage: %v", err)
+	}
+	if expected, got := 100<<10, stackUsage; got > expected {
+		t.Fatalf("expected < %d bytes of memory per thread, got %d", expected, got)
+	}
+}
+
+func TestSigStackSwapping(t *testing.T) {
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no sigaltstack on %s", runtime.GOOS)
+	}
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "SigStack")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q got %v", want, got)
+	}
+}
+
+func TestCgoTracebackSigpanic(t *testing.T) {
+	// Test unwinding over a sigpanic in C code without a C
+	// symbolizer. See issue #23576.
+	if runtime.GOOS == "windows" {
+		// On Windows if we get an exception in C code, we let
+		// the Windows exception handler unwind it, rather
+		// than injecting a sigpanic.
+		t.Skip("no sigpanic in C on windows")
+	}
+	if runtime.GOOS == "ios" {
+		testenv.SkipFlaky(t, 59912)
+	}
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "TracebackSigpanic")
+	t.Log(got)
+	// We should see the function that calls the C function.
+	want := "main.TracebackSigpanic"
+	if !strings.Contains(got, want) {
+		if runtime.GOOS == "android" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64") {
+			testenv.SkipFlaky(t, 58794)
+		}
+		t.Errorf("did not see %q in output", want)
+	}
+	// We shouldn't inject a sigpanic call. (see issue 57698)
+	nowant := "runtime.sigpanic"
+	if strings.Contains(got, nowant) {
+		t.Errorf("unexpectedly saw %q in output", nowant)
+	}
+	// No runtime errors like "runtime: unexpected return pc".
+	nowant = "runtime: "
+	if strings.Contains(got, nowant) {
+		t.Errorf("unexpectedly saw %q in output", nowant)
+	}
+}
+
+func TestCgoPanicCallback(t *testing.T) {
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "PanicCallback")
+	t.Log(got)
+	want := "panic: runtime error: invalid memory address or nil pointer dereference"
+	if !strings.Contains(got, want) {
+		t.Errorf("did not see %q in output", want)
+	}
+	want = "panic_callback"
+	if !strings.Contains(got, want) {
+		t.Errorf("did not see %q in output", want)
+	}
+	want = "PanicCallback"
+	if !strings.Contains(got, want) {
+		t.Errorf("did not see %q in output", want)
+	}
+	// No runtime errors like "runtime: unexpected return pc".
+	nowant := "runtime: "
+	if strings.Contains(got, nowant) {
+		t.Errorf("did not see %q in output", want)
+	}
+}
+
+// Test that C code called via cgo can use large Windows thread stacks
+// and call back in to Go without crashing. See issue #20975.
+//
+// See also TestBigStackCallbackSyscall.
+func TestBigStackCallbackCgo(t *testing.T) {
+	if runtime.GOOS != "windows" {
+		t.Skip("skipping windows specific test")
+	}
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "BigStack")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q got %v", want, got)
+	}
+}
+
+func nextTrace(lines []string) ([]string, []string) {
+	var trace []string
+	for n, line := range lines {
+		if strings.HasPrefix(line, "---") {
+			return trace, lines[n+1:]
+		}
+		fields := strings.Fields(strings.TrimSpace(line))
+		if len(fields) == 0 {
+			continue
+		}
+		// Last field contains the function name.
+		trace = append(trace, fields[len(fields)-1])
+	}
+	return nil, nil
+}
+
+func findTrace(text, top string) []string {
+	lines := strings.Split(text, "\n")
+	_, lines = nextTrace(lines) // Skip the header.
+	for len(lines) > 0 {
+		var t []string
+		t, lines = nextTrace(lines)
+		if len(t) == 0 {
+			continue
+		}
+		if t[0] == top {
+			return t
+		}
+	}
+	return nil
+}
+
+func TestSegv(t *testing.T) {
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no signals on %s", runtime.GOOS)
+	}
+
+	for _, test := range []string{"Segv", "SegvInCgo", "TgkillSegv", "TgkillSegvInCgo"} {
+		test := test
+
+		// The tgkill variants only run on Linux.
+		if runtime.GOOS != "linux" && strings.HasPrefix(test, "Tgkill") {
+			continue
+		}
+
+		t.Run(test, func(t *testing.T) {
+			if test == "SegvInCgo" && runtime.GOOS == "ios" {
+				testenv.SkipFlaky(t, 59947) // Don't even try, in case it times out.
+			}
+
+			t.Parallel()
+			prog := "testprog"
+			if strings.HasSuffix(test, "InCgo") {
+				prog = "testprogcgo"
+			}
+			got := runTestProg(t, prog, test)
+			t.Log(got)
+			want := "SIGSEGV"
+			if !strings.Contains(got, want) {
+				if runtime.GOOS == "darwin" && runtime.GOARCH == "amd64" && strings.Contains(got, "fatal: morestack on g0") {
+					testenv.SkipFlaky(t, 39457)
+				}
+				t.Errorf("did not see %q in output", want)
+			}
+
+			// No runtime errors like "runtime: unknown pc".
+			switch runtime.GOOS {
+			case "darwin", "ios", "illumos", "solaris":
+				// Runtime sometimes throws when generating the traceback.
+				testenv.SkipFlaky(t, 49182)
+			case "linux":
+				if runtime.GOARCH == "386" {
+					// Runtime throws when generating a traceback from
+					// a VDSO call via asmcgocall.
+					testenv.SkipFlaky(t, 50504)
+				}
+			}
+			if test == "SegvInCgo" && strings.Contains(got, "unknown pc") {
+				testenv.SkipFlaky(t, 50979)
+			}
+
+			for _, nowant := range []string{"fatal error: ", "runtime: "} {
+				if strings.Contains(got, nowant) {
+					if runtime.GOOS == "darwin" && strings.Contains(got, "0xb01dfacedebac1e") {
+						// See the comment in signal_darwin_amd64.go.
+						t.Skip("skipping due to Darwin handling of malformed addresses")
+					}
+					t.Errorf("unexpectedly saw %q in output", nowant)
+				}
+			}
+		})
+	}
+}
+
+func TestAbortInCgo(t *testing.T) {
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		// N.B. On Windows, C abort() causes the program to exit
+		// without going through the runtime at all.
+		t.Skipf("no signals on %s", runtime.GOOS)
+	}
+
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "Abort")
+	t.Log(got)
+	want := "SIGABRT"
+	if !strings.Contains(got, want) {
+		t.Errorf("did not see %q in output", want)
+	}
+	// No runtime errors like "runtime: unknown pc".
+	nowant := "runtime: "
+	if strings.Contains(got, nowant) {
+		t.Errorf("did not see %q in output", want)
+	}
+}
+
+// TestEINTR tests that we handle EINTR correctly.
+// See issue #20400 and friends.
+func TestEINTR(t *testing.T) {
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no EINTR on %s", runtime.GOOS)
+	case "linux":
+		if runtime.GOARCH == "386" {
+			// On linux-386 the Go signal handler sets
+			// a restorer function that is not preserved
+			// by the C sigaction call in the test,
+			// causing the signal handler to crash when
+			// returning the normal code. The test is not
+			// architecture-specific, so just skip on 386
+			// rather than doing a complicated workaround.
+			t.Skip("skipping on linux-386; C sigaction does not preserve Go restorer")
+		}
+	}
+
+	t.Parallel()
+	output := runTestProg(t, "testprogcgo", "EINTR")
+	want := "OK\n"
+	if output != want {
+		t.Fatalf("want %s, got %s\n", want, output)
+	}
+}
+
+// Issue #42207.
+func TestNeedmDeadlock(t *testing.T) {
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no signals on %s", runtime.GOOS)
+	}
+	output := runTestProg(t, "testprogcgo", "NeedmDeadlock")
+	want := "OK\n"
+	if output != want {
+		t.Fatalf("want %s, got %s\n", want, output)
+	}
+}
+
+func TestCgoTracebackGoroutineProfile(t *testing.T) {
+	output := runTestProg(t, "testprogcgo", "GoroutineProfile")
+	want := "OK\n"
+	if output != want {
+		t.Fatalf("want %s, got %s\n", want, output)
+	}
+}
+
+func TestCgoTraceParser(t *testing.T) {
+	// Test issue 29707.
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no pthreads on %s", runtime.GOOS)
+	}
+	output := runTestProg(t, "testprogcgo", "CgoTraceParser")
+	want := "OK\n"
+	ErrTimeOrder := "ErrTimeOrder\n"
+	if output == ErrTimeOrder {
+		t.Skipf("skipping due to golang.org/issue/16755: %v", output)
+	} else if output != want {
+		t.Fatalf("want %s, got %s\n", want, output)
+	}
+}
+
+func TestCgoTraceParserWithOneProc(t *testing.T) {
+	// Test issue 29707.
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no pthreads on %s", runtime.GOOS)
+	}
+	output := runTestProg(t, "testprogcgo", "CgoTraceParser", "GOMAXPROCS=1")
+	want := "OK\n"
+	ErrTimeOrder := "ErrTimeOrder\n"
+	if output == ErrTimeOrder {
+		t.Skipf("skipping due to golang.org/issue/16755: %v", output)
+	} else if output != want {
+		t.Fatalf("GOMAXPROCS=1, want %s, got %s\n", want, output)
+	}
+}
+
+func TestCgoSigfwd(t *testing.T) {
+	t.Parallel()
+	if !goos.IsUnix {
+		t.Skipf("no signals on %s", runtime.GOOS)
+	}
+
+	got := runTestProg(t, "testprogcgo", "CgoSigfwd", "GO_TEST_CGOSIGFWD=1")
+	if want := "OK\n"; got != want {
+		t.Fatalf("expected %q, but got:\n%s", want, got)
+	}
+}
+
+func TestDestructorCallback(t *testing.T) {
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "DestructorCallback")
+	if want := "OK\n"; got != want {
+		t.Errorf("expected %q, but got:\n%s", want, got)
+	}
+}
+
+func TestDestructorCallbackRace(t *testing.T) {
+	// This test requires building with -race,
+	// so it's somewhat slow.
+	if testing.Short() {
+		t.Skip("skipping test in -short mode")
+	}
+
+	if !platform.RaceDetectorSupported(runtime.GOOS, runtime.GOARCH) {
+		t.Skipf("skipping on %s/%s because race detector not supported", runtime.GOOS, runtime.GOARCH)
+	}
+
+	t.Parallel()
+
+	exe, err := buildTestProg(t, "testprogcgo", "-race")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	got, err := testenv.CleanCmdEnv(exec.Command(exe, "DestructorCallback")).CombinedOutput()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if want := "OK\n"; string(got) != want {
+		t.Errorf("expected %q, but got:\n%s", want, got)
+	}
+}
+
+func TestEnsureBindM(t *testing.T) {
+	t.Parallel()
+	switch runtime.GOOS {
+	case "windows", "plan9":
+		t.Skipf("skipping bindm test on %s", runtime.GOOS)
+	}
+	got := runTestProg(t, "testprogcgo", "EnsureBindM")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q, got %v", want, got)
+	}
+}
+
+func TestStackSwitchCallback(t *testing.T) {
+	t.Parallel()
+	switch runtime.GOOS {
+	case "windows", "plan9", "android", "ios", "openbsd": // no getcontext
+		t.Skipf("skipping test on %s", runtime.GOOS)
+	}
+	got := runTestProg(t, "testprogcgo", "StackSwitchCallback")
+	skip := "SKIP\n"
+	if got == skip {
+		t.Skip("skipping on musl/bionic libc")
+	}
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q, got %v", want, got)
+	}
+}