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// +build windows
package runtime_test
import (
"bufio"
"bytes"
"fmt"
"internal/testenv"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"syscall"
"testing"
)
func TestVectoredHandlerDontCrashOnLibrary(t *testing.T) {
if *flagQuick {
t.Skip("-quick")
}
if runtime.GOARCH != "amd64" {
t.Skip("this test can only run on windows/amd64")
}
testenv.MustHaveGoBuild(t)
testenv.MustHaveExecPath(t, "gcc")
testprog.Lock()
defer testprog.Unlock()
dir, err := os.MkdirTemp("", "go-build")
if err != nil {
t.Fatalf("failed to create temp directory: %v", err)
}
defer os.RemoveAll(dir)
// build go dll
dll := filepath.Join(dir, "testwinlib.dll")
cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", dll, "--buildmode", "c-shared", "testdata/testwinlib/main.go")
out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
if err != nil {
t.Fatalf("failed to build go library: %s\n%s", err, out)
}
// build c program
exe := filepath.Join(dir, "test.exe")
cmd = exec.Command("gcc", "-L"+dir, "-I"+dir, "-ltestwinlib", "-o", exe, "testdata/testwinlib/main.c")
out, err = testenv.CleanCmdEnv(cmd).CombinedOutput()
if err != nil {
t.Fatalf("failed to build c exe: %s\n%s", err, out)
}
// run test program
cmd = exec.Command(exe)
out, err = testenv.CleanCmdEnv(cmd).CombinedOutput()
if err != nil {
t.Fatalf("failure while running executable: %s\n%s", err, out)
}
expectedOutput := "exceptionCount: 1\ncontinueCount: 1\n"
// cleaning output
cleanedOut := strings.ReplaceAll(string(out), "\r\n", "\n")
if cleanedOut != expectedOutput {
t.Errorf("expected output %q, got %q", expectedOutput, cleanedOut)
}
}
func sendCtrlBreak(pid int) error {
kernel32, err := syscall.LoadDLL("kernel32.dll")
if err != nil {
return fmt.Errorf("LoadDLL: %v\n", err)
}
generateEvent, err := kernel32.FindProc("GenerateConsoleCtrlEvent")
if err != nil {
return fmt.Errorf("FindProc: %v\n", err)
}
result, _, err := generateEvent.Call(syscall.CTRL_BREAK_EVENT, uintptr(pid))
if result == 0 {
return fmt.Errorf("GenerateConsoleCtrlEvent: %v\n", err)
}
return nil
}
// TestLibraryCtrlHandler tests that Go DLL allows calling program to handle console control events.
// See https://golang.org/issues/35965.
func TestLibraryCtrlHandler(t *testing.T) {
if *flagQuick {
t.Skip("-quick")
}
if runtime.GOARCH != "amd64" {
t.Skip("this test can only run on windows/amd64")
}
testenv.MustHaveGoBuild(t)
testenv.MustHaveExecPath(t, "gcc")
testprog.Lock()
defer testprog.Unlock()
dir, err := os.MkdirTemp("", "go-build")
if err != nil {
t.Fatalf("failed to create temp directory: %v", err)
}
defer os.RemoveAll(dir)
// build go dll
dll := filepath.Join(dir, "dummy.dll")
cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", dll, "--buildmode", "c-shared", "testdata/testwinlibsignal/dummy.go")
out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
if err != nil {
t.Fatalf("failed to build go library: %s\n%s", err, out)
}
// build c program
exe := filepath.Join(dir, "test.exe")
cmd = exec.Command("gcc", "-o", exe, "testdata/testwinlibsignal/main.c")
out, err = testenv.CleanCmdEnv(cmd).CombinedOutput()
if err != nil {
t.Fatalf("failed to build c exe: %s\n%s", err, out)
}
// run test program
cmd = exec.Command(exe)
var stderr bytes.Buffer
cmd.Stderr = &stderr
outPipe, err := cmd.StdoutPipe()
if err != nil {
t.Fatalf("Failed to create stdout pipe: %v", err)
}
outReader := bufio.NewReader(outPipe)
cmd.SysProcAttr = &syscall.SysProcAttr{
CreationFlags: syscall.CREATE_NEW_PROCESS_GROUP,
}
if err := cmd.Start(); err != nil {
t.Fatalf("Start failed: %v", err)
}
errCh := make(chan error, 1)
go func() {
if line, err := outReader.ReadString('\n'); err != nil {
errCh <- fmt.Errorf("could not read stdout: %v", err)
} else if strings.TrimSpace(line) != "ready" {
errCh <- fmt.Errorf("unexpected message: %v", line)
} else {
errCh <- sendCtrlBreak(cmd.Process.Pid)
}
}()
if err := <-errCh; err != nil {
t.Fatal(err)
}
if err := cmd.Wait(); err != nil {
t.Fatalf("Program exited with error: %v\n%s", err, &stderr)
}
}
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