// 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.
// +build cgo
package runtime_test
import (
"bytes"
"fmt"
"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")
}
}
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)
}
if runtime.GOARCH == "ppc64" && runtime.GOOS == "linux" {
// TODO(austin) External linking not implemented on
// linux/ppc64 (issue #8912)
t.Skipf("no external linking on ppc64")
}
exe, err := buildTestProg(t, "testprogcgo", "-tags=threadprof")
if err != nil {
t.Fatal(err)
}
got, err := testenv.CleanCmdEnv(exec.Command(exe, "CgoExternalThreadSIGPROF")).CombinedOutput()
if err != nil {
t.Fatalf("exit status: %v\n%s", err, got)
}
if want := "OK\n"; string(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)
}
exe, err := buildTestProg(t, "testprogcgo", "-tags=threadprof")
if err != nil {
t.Fatal(err)
}
got, err := testenv.CleanCmdEnv(exec.Command(exe, "CgoExternalThreadSIGPROF")).CombinedOutput()
if err != nil {
t.Fatalf("exit status: %v\n%s", err, got)
}
want := []byte("OK\n")
if !bytes.Equal(got, want) {
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")
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 TestCgoCrashTraceback(t *testing.T) {
t.Parallel()
switch platform := runtime.GOOS + "/" + runtime.GOARCH; platform {
case "darwin/amd64":
case "linux/amd64":
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 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 testCgoPprof(t *testing.T, buildArg, runArg, top, bottom string) {
t.Parallel()
if runtime.GOOS != "linux" || (runtime.GOARCH != "amd64" && runtime.GOARCH != "ppc64le") {
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)
}
got, err := testenv.CleanCmdEnv(exec.Command(exe, runArg)).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", "-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 (runtime.GOOS != "linux" && runtime.GOOS != "freebsd") || runtime.GOARCH != "amd64" {
t.Skipf("not yet supported on %s/%s", runtime.GOOS, runtime.GOARCH)
}
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) {
t.Parallel()
if (runtime.GOOS != "linux" && runtime.GOOS != "freebsd") || runtime.GOARCH != "amd64" {
t.Skipf("not yet supported on %s/%s", runtime.GOOS, runtime.GOARCH)
}
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, "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")
}
t.Parallel()
got := runTestProg(t, "testprogcgo", "TracebackSigpanic")
want := "runtime.sigpanic"
if !strings.Contains(got, want) {
t.Fatalf("want failure containing %q. output:\n%s\n", want, got)
}
nowant := "unexpected return pc"
if strings.Contains(got, nowant) {
t.Fatalf("failure incorrectly contains %q. output:\n%s\n", nowant, got)
}
}
// 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
}
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