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WSL/test/windows/WSLATests.cpp
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/*++
Copyright (c) Microsoft. All rights reserved.
Module Name:
WSLATests.cpp
Abstract:
This file contains test cases for the WSLA API.
--*/
#include "precomp.h"
#include "Common.h"
#include "WSLAApi.h"
#include "wslaservice.h"
#include "WSLAProcessLauncher.h"
#include "WSLAContainerLauncher.h"
#include "WslCoreFilesystem.h"
using namespace wsl::windows::common::registry;
using wsl::windows::common::ProcessFlags;
using wsl::windows::common::RunningWSLAContainer;
using wsl::windows::common::RunningWSLAProcess;
using wsl::windows::common::WSLAContainerLauncher;
using wsl::windows::common::WSLAProcessLauncher;
using wsl::windows::common::relay::OverlappedIOHandle;
using wsl::windows::common::relay::WriteHandle;
class WSLATests
{
WSL_TEST_CLASS(WSLATests)
wil::unique_couninitialize_call coinit = wil::CoInitializeEx();
WSADATA Data;
std::filesystem::path testVhd;
TEST_CLASS_SETUP(TestClassSetup)
{
THROW_IF_WIN32_ERROR(WSAStartup(MAKEWORD(2, 2), &Data));
auto distroKey = OpenDistributionKey(LXSS_DISTRO_NAME_TEST_L);
auto vhdPath = wsl::windows::common::registry::ReadString(distroKey.get(), nullptr, L"BasePath");
testVhd = std::filesystem::path{vhdPath} / "ext4.vhdx";
WslShutdown();
return true;
}
TEST_CLASS_CLEANUP(TestClassCleanup)
{
return true;
}
wil::com_ptr<IWSLASession> CreateSession(VIRTUAL_MACHINE_SETTINGS& vmSettings, const WSLA_SESSION_SETTINGS& sessionSettings = {L"wsla-test"})
{
if (vmSettings.RootVhdType == nullptr)
{
vmSettings.RootVhdType = "ext4";
}
wil::com_ptr<IWSLAUserSession> userSession;
VERIFY_SUCCEEDED(CoCreateInstance(__uuidof(WSLAUserSession), nullptr, CLSCTX_LOCAL_SERVER, IID_PPV_ARGS(&userSession)));
wsl::windows::common::security::ConfigureForCOMImpersonation(userSession.get());
wil::com_ptr<IWSLASession> session;
VERIFY_SUCCEEDED(userSession->CreateSession(&sessionSettings, &vmSettings, &session));
wsl::windows::common::security::ConfigureForCOMImpersonation(session.get());
return session;
}
TEST_METHOD(GetVersion)
{
wil::com_ptr<IWSLAUserSession> userSession;
VERIFY_SUCCEEDED(CoCreateInstance(__uuidof(WSLAUserSession), nullptr, CLSCTX_LOCAL_SERVER, IID_PPV_ARGS(&userSession)));
WSLA_VERSION version{};
VERIFY_SUCCEEDED(userSession->GetVersion(&version));
VERIFY_ARE_EQUAL(version.Major, WSL_PACKAGE_VERSION_MAJOR);
VERIFY_ARE_EQUAL(version.Minor, WSL_PACKAGE_VERSION_MINOR);
VERIFY_ARE_EQUAL(version.Revision, WSL_PACKAGE_VERSION_REVISION);
}
RunningWSLAProcess::ProcessResult RunCommand(IWSLASession* session, const std::vector<std::string>& command, int timeout = 600000)
{
WSLAProcessLauncher process(command[0], command);
return process.Launch(*session).WaitAndCaptureOutput();
}
RunningWSLAProcess::ProcessResult ExpectCommandResult(
IWSLASession* session, const std::vector<std::string>& command, int expectResult, bool expectSignal = false, int timeout = 600000)
{
auto result = RunCommand(session, command, timeout);
if (result.Signalled != expectSignal)
{
auto cmd = wsl::shared::string::Join(command, ' ');
if (expectSignal)
{
LogError(
"Command: %hs didn't get signalled as expected. ExitCode: %i, Stdout: '%hs', Stderr: '%hs'",
cmd.c_str(),
result.Code,
result.Output[1].c_str(),
result.Output[2].c_str());
}
else
{
LogError(
"Command: %hs didn't receive an unexpected signal: %i. Stdout: '%hs', Stderr: '%hs'",
cmd.c_str(),
result.Code,
result.Output[1].c_str(),
result.Output[2].c_str());
}
}
if (result.Code != expectResult)
{
auto cmd = wsl::shared::string::Join(command, ' ');
LogError(
"Command: %hs didn't return expected code (%i). ExitCode: %i, Stdout: '%hs', Stderr: '%hs'",
cmd.c_str(),
expectResult,
result.Code,
result.Output[1].c_str(),
result.Output[2].c_str());
}
return result;
}
void ValidateProcessOutput(RunningWSLAProcess& process, const std::map<int, std::string>& expectedOutput, int expectedResult = 0)
{
auto result = process.WaitAndCaptureOutput();
if (result.Code != expectedResult)
{
LogError(
"Command didn't return expected code (%i). ExitCode: %i, Stdout: '%hs', Stderr: '%hs'",
expectedResult,
result.Code,
result.Output[1].c_str(),
result.Output[2].c_str());
return;
}
for (const auto& [fd, expected] : expectedOutput)
{
auto it = result.Output.find(fd);
if (it == result.Output.end())
{
LogError("Expected output on fd %i, but none found.", fd);
return;
}
if (it->second != expected)
{
LogError("Unexpected output on fd %i. Expected: '%hs', Actual: '%hs'", fd, expected.c_str(), it->second.c_str());
}
}
}
TEST_METHOD(CustomDmesgOutput)
{
WSL2_TEST_ONLY();
auto createVmWithDmesg = [this](bool earlyBootLogging) {
auto [read, write] = CreateSubprocessPipe(false, false);
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.DmesgOutput = (ULONG) reinterpret_cast<ULONG_PTR>(write.get());
settings.EnableEarlyBootDmesg = earlyBootLogging;
settings.RootVhd = testVhd.c_str();
std::vector<char> dmesgContent;
auto readDmesg = [read = read.get(), &dmesgContent]() mutable {
DWORD Offset = 0;
constexpr auto bufferSize = 1024;
while (true)
{
dmesgContent.resize(Offset + bufferSize);
DWORD Read{};
if (!ReadFile(read, &dmesgContent[Offset], bufferSize, &Read, nullptr))
{
LogInfo("ReadFile() failed: %lu", GetLastError());
}
if (Read == 0)
{
break;
}
Offset += Read;
}
};
std::thread thread(readDmesg); // Needs to be created before the VM starts, to avoid a pipe deadlock.
auto session = CreateSession(settings);
auto detach = wil::scope_exit_log(WI_DIAGNOSTICS_INFO, [&]() {
session->Shutdown(30 * 1000);
if (thread.joinable())
{
thread.join();
}
});
write.reset();
ExpectCommandResult(session.get(), {"/bin/bash", "-c", "echo DmesgTest > /dev/kmsg"}, 0);
VERIFY_ARE_EQUAL(session->Shutdown(30 * 1000), S_OK);
detach.reset();
auto contentString = std::string(dmesgContent.begin(), dmesgContent.end());
VERIFY_ARE_NOT_EQUAL(contentString.find("Run /init as init process"), std::string::npos);
VERIFY_ARE_NOT_EQUAL(contentString.find("DmesgTest"), std::string::npos);
return contentString;
};
auto validateFirstDmesgLine = [](const std::string& dmesg, const char* expected) {
auto firstLf = dmesg.find("\n");
VERIFY_ARE_NOT_EQUAL(firstLf, std::string::npos);
VERIFY_IS_TRUE(dmesg.find(expected) < firstLf);
};
// Dmesg without early boot logging
{
auto dmesg = createVmWithDmesg(false);
// Verify that the first line is "brd: module loaded";
validateFirstDmesgLine(dmesg, "brd: module loaded");
}
// Dmesg with early boot logging
{
auto dmesg = createVmWithDmesg(true);
validateFirstDmesgLine(dmesg, "Linux version");
}
}
TEST_METHOD(TerminationCallback)
{
WSL2_TEST_ONLY();
class DECLSPEC_UUID("7BC4E198-6531-4FA6-ADE2-5EF3D2A04DFF") CallbackInstance
: public Microsoft::WRL::RuntimeClass<Microsoft::WRL::RuntimeClassFlags<Microsoft::WRL::ClassicCom>, ITerminationCallback, IFastRundown>
{
public:
CallbackInstance(std::function<void(WSLAVirtualMachineTerminationReason, LPCWSTR)>&& callback) :
m_callback(std::move(callback))
{
}
HRESULT OnTermination(WSLAVirtualMachineTerminationReason Reason, LPCWSTR Details) override
{
m_callback(Reason, Details);
return S_OK;
}
private:
std::function<void(WSLAVirtualMachineTerminationReason, LPCWSTR)> m_callback;
};
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.RootVhd = testVhd.c_str();
std::promise<std::pair<WSLAVirtualMachineTerminationReason, std::wstring>> promise;
CallbackInstance callback{[&](WSLAVirtualMachineTerminationReason reason, LPCWSTR details) {
promise.set_value(std::make_pair(reason, details));
}};
WSLA_SESSION_SETTINGS sessionSettings{L"wsla-test"};
sessionSettings.TerminationCallback = &callback;
auto session = CreateSession(settings, sessionSettings);
wil::com_ptr<IWSLAVirtualMachine> vm;
VERIFY_SUCCEEDED(session->GetVirtualMachine(&vm));
VERIFY_SUCCEEDED(vm->Shutdown(30 * 1000));
auto future = promise.get_future();
auto result = future.wait_for(std::chrono::seconds(30));
auto [reason, details] = future.get();
VERIFY_ARE_EQUAL(reason, WSLAVirtualMachineTerminationReasonShutdown);
VERIFY_ARE_NOT_EQUAL(details, L"");
}
TEST_METHOD(InteractiveShell)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
WSLAProcessLauncher launcher("/bin/sh", {"/bin/sh"}, {"TERM=xterm-256color"}, ProcessFlags::None);
launcher.AddFd(WSLA_PROCESS_FD{.Fd = 0, .Type = WSLAFdTypeTerminalInput});
launcher.AddFd(WSLA_PROCESS_FD{.Fd = 1, .Type = WSLAFdTypeTerminalOutput});
launcher.AddFd(WSLA_PROCESS_FD{.Fd = 2, .Type = WSLAFdTypeTerminalControl});
auto process = launcher.Launch(*session);
wil::unique_handle ttyInput = process.GetStdHandle(0);
wil::unique_handle ttyOutput = process.GetStdHandle(1);
auto validateTtyOutput = [&](const std::string& expected) {
std::string buffer(expected.size(), '\0');
DWORD offset = 0;
while (offset < buffer.size())
{
DWORD bytesRead{};
VERIFY_IS_TRUE(ReadFile(ttyOutput.get(), buffer.data() + offset, static_cast<DWORD>(buffer.size() - offset), &bytesRead, nullptr));
offset += bytesRead;
}
buffer.resize(offset);
VERIFY_ARE_EQUAL(buffer, expected);
};
auto writeTty = [&](const std::string& content) {
VERIFY_IS_TRUE(WriteFile(ttyInput.get(), content.data(), static_cast<DWORD>(content.size()), nullptr, nullptr));
};
// Expect the shell prompt to be displayed
validateTtyOutput("#");
writeTty("echo OK\n");
validateTtyOutput(" echo OK\r\nOK");
// Exit the shell
writeTty("exit\n");
VERIFY_IS_TRUE(process.GetExitEvent().wait(30 * 1000));
}
TEST_METHOD(NATNetworking)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.NetworkingMode = WSLANetworkingModeNAT;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
// Validate that eth0 has an ip address
ExpectCommandResult(
session.get(),
{"/bin/bash",
"-c",
"ip a show dev eth0 | grep -iF 'inet ' | grep -E '[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}'"},
0);
ExpectCommandResult(session.get(), {"/bin/grep", "-iF", "nameserver", "/etc/resolv.conf"}, 0);
}
TEST_METHOD(NATNetworkingWithDnsTunneling)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.NetworkingMode = WSLANetworkingModeNAT;
settings.EnableDnsTunneling = true;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
// Validate that eth0 has an ip address
ExpectCommandResult(
session.get(),
{"/bin/bash",
"-c",
"ip a show dev eth0 | grep -iF 'inet ' | grep -E '[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}'"},
0);
// Verify that /etc/resolv.conf is correctly configured.
auto result = ExpectCommandResult(session.get(), {"/bin/grep", "-iF", "nameserver ", "/etc/resolv.conf"}, 0);
VERIFY_ARE_EQUAL(result.Output[1], std::format("nameserver {}\n", LX_INIT_DNS_TUNNELING_IP_ADDRESS));
}
TEST_METHOD(VirtioProxyNetworking)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.NetworkingMode = WSLANetworkingModeVirtioProxy;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
// Validate that eth0 has an ip address
ExpectCommandResult(
session.get(),
{"/bin/bash",
"-c",
"ip a show dev eth0 | grep -iF 'inet ' | grep -E '[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}'"},
0);
ExpectCommandResult(session.get(), {"/bin/grep", "-iF", "nameserver", "/etc/resolv.conf"}, 0);
}
TEST_METHOD(OpenFiles)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
struct FileFd
{
int Fd;
WSLAFdType Flags;
const char* Path;
};
auto createProcess = [&](const std::vector<std::string>& Args, const std::vector<FileFd>& Fds, HRESULT expectedError = S_OK) {
WSLAProcessLauncher launcher(Args[0], Args, {}, ProcessFlags::None);
for (const auto& e : Fds)
{
launcher.AddFd(WSLA_PROCESS_FD{.Fd = e.Fd, .Type = e.Flags, .Path = e.Path});
}
auto [hresult, _, process] = launcher.LaunchNoThrow(*session);
VERIFY_ARE_EQUAL(hresult, expectedError);
return std::move(process);
};
{
auto process =
createProcess({"/bin/cat"}, {{0, WSLAFdTypeLinuxFileInput, "/proc/self/comm"}, {1, WSLAFdTypeDefault, nullptr}});
VERIFY_ARE_EQUAL(process->WaitAndCaptureOutput().Output[1], "cat\n");
}
{
auto read = [&]() {
auto process =
createProcess({"/bin/cat"}, {{0, WSLAFdTypeLinuxFileInput, "/tmp/output"}, {1, WSLAFdTypeDefault, nullptr}});
return process->WaitAndCaptureOutput().Output[1];
};
// Write to a new file.
auto process = createProcess(
{"/bin/cat"},
{{0, WSLAFdTypeDefault, nullptr},
{1, static_cast<WSLAFdType>(WSLAFdTypeLinuxFileOutput | WSLAFdTypeLinuxFileCreate), "/tmp/output"}});
constexpr auto content = "TestOutput";
VERIFY_IS_TRUE(WriteFile(process->GetStdHandle(0).get(), content, static_cast<DWORD>(strlen(content)), nullptr, nullptr));
VERIFY_ARE_EQUAL(process->WaitAndCaptureOutput().Code, 0);
VERIFY_ARE_EQUAL(read(), content);
// Append content to the same file
auto appendProcess = createProcess(
{"/bin/cat"},
{{0, WSLAFdTypeDefault, nullptr},
{1, static_cast<WSLAFdType>(WSLAFdTypeLinuxFileOutput | WSLAFdTypeLinuxFileAppend), "/tmp/output"}});
VERIFY_IS_TRUE(WriteFile(appendProcess->GetStdHandle(0).get(), content, static_cast<DWORD>(strlen(content)), nullptr, nullptr));
VERIFY_ARE_EQUAL(appendProcess->WaitAndCaptureOutput().Code, 0);
VERIFY_ARE_EQUAL(read(), std::format("{}{}", content, content));
// Truncate the file
auto truncProcess = createProcess(
{"/bin/cat"},
{{0, WSLAFdTypeDefault, nullptr}, {1, static_cast<WSLAFdType>(WSLAFdTypeLinuxFileOutput), "/tmp/output"}});
VERIFY_IS_TRUE(WriteFile(truncProcess->GetStdHandle(0).get(), content, static_cast<DWORD>(strlen(content)), nullptr, nullptr));
VERIFY_ARE_EQUAL(truncProcess->WaitAndCaptureOutput().Code, 0);
VERIFY_ARE_EQUAL(read(), content);
}
// Test various error paths
{
createProcess({"/bin/cat"}, {{0, static_cast<WSLAFdType>(WSLAFdTypeLinuxFileOutput), "/tmp/DoesNotExist"}}, E_FAIL);
createProcess({"/bin/cat"}, {{0, static_cast<WSLAFdType>(WSLAFdTypeLinuxFileOutput), nullptr}}, E_INVALIDARG);
createProcess({"/bin/cat"}, {{0, static_cast<WSLAFdType>(WSLAFdTypeDefault), "should-be-null"}}, E_INVALIDARG);
createProcess({"/bin/cat"}, {{0, static_cast<WSLAFdType>(WSLAFdTypeDefault | WSLAFdTypeLinuxFileOutput), nullptr}}, E_INVALIDARG);
createProcess({"/bin/cat"}, {{0, static_cast<WSLAFdType>(WSLAFdTypeLinuxFileAppend), nullptr}}, E_INVALIDARG);
createProcess({"/bin/cat"}, {{0, static_cast<WSLAFdType>(WSLAFdTypeLinuxFileInput | WSLAFdTypeLinuxFileAppend), nullptr}}, E_INVALIDARG);
}
// Validate that read & write modes are respected
{
auto process = createProcess(
{"/bin/cat"},
{{0, WSLAFdTypeLinuxFileInput, "/proc/self/comm"}, {1, WSLAFdTypeLinuxFileInput, "/tmp/output"}, {2, WSLAFdTypeDefault, nullptr}});
auto result = process->WaitAndCaptureOutput();
VERIFY_ARE_EQUAL(result.Output[2], "/bin/cat: write error: Bad file descriptor\n");
VERIFY_ARE_EQUAL(result.Code, 1);
}
{
auto process = createProcess({"/bin/cat"}, {{0, WSLAFdTypeLinuxFileOutput, "/tmp/output"}, {2, WSLAFdTypeDefault, nullptr}});
auto result = process->WaitAndCaptureOutput();
VERIFY_ARE_EQUAL(result.Output[2], "/bin/cat: standard output: Bad file descriptor\n");
VERIFY_ARE_EQUAL(result.Code, 1);
}
}
TEST_METHOD(NATPortMapping)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.NetworkingMode = WSLANetworkingModeNAT;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
wil::com_ptr<IWSLAVirtualMachine> vm;
VERIFY_SUCCEEDED(session->GetVirtualMachine(&vm));
auto waitForOutput = [](HANDLE Handle, const char* Content) {
std::string output;
DWORD index = 0;
while (true) // TODO: timeout
{
constexpr auto bufferSize = 100;
output.resize(output.size() + bufferSize);
DWORD bytesRead = 0;
if (!ReadFile(Handle, &output[index], bufferSize, &bytesRead, nullptr))
{
LogError("ReadFile failed with %lu", GetLastError());
VERIFY_FAIL();
}
output.resize(index + bytesRead);
if (bytesRead == 0)
{
LogError("Process exited, output: %hs", output.c_str());
VERIFY_FAIL();
}
index += bytesRead;
if (output.find(Content) != std::string::npos)
{
break;
}
}
};
auto listen = [&](short port, const char* content, bool ipv6) {
auto cmd = std::format("echo -n '{}' | /usr/bin/socat -dd TCP{}-LISTEN:{},reuseaddr -", content, ipv6 ? "6" : "", port);
auto process = WSLAProcessLauncher("/bin/bash", {"/bin/bash", "-c", cmd}).Launch(*session);
waitForOutput(process.GetStdHandle(2).get(), "listening on");
return process;
};
auto connectAndRead = [&](short port, int family) -> std::string {
SOCKADDR_INET addr{};
addr.si_family = family;
INETADDR_SETLOOPBACK((PSOCKADDR)&addr);
SS_PORT(&addr) = htons(port);
wil::unique_socket hostSocket{socket(family, SOCK_STREAM, IPPROTO_TCP)};
THROW_LAST_ERROR_IF(!hostSocket);
THROW_LAST_ERROR_IF(connect(hostSocket.get(), reinterpret_cast<SOCKADDR*>(&addr), sizeof(addr)) == SOCKET_ERROR);
return ReadToString(hostSocket.get());
};
auto expectContent = [&](short port, int family, const char* expected) {
auto content = connectAndRead(port, family);
VERIFY_ARE_EQUAL(content, expected);
};
auto expectNotBound = [&](short port, int family) {
auto result = wil::ResultFromException([&]() { connectAndRead(port, family); });
VERIFY_ARE_EQUAL(result, HRESULT_FROM_WIN32(WSAECONNREFUSED));
};
// Map port
VERIFY_SUCCEEDED(vm->MapPort(AF_INET, 1234, 80, false));
// Validate that the same port can't be bound twice
VERIFY_ARE_EQUAL(vm->MapPort(AF_INET, 1234, 80, false), HRESULT_FROM_WIN32(ERROR_ALREADY_EXISTS));
// Check simple case
listen(80, "port80", false);
expectContent(1234, AF_INET, "port80");
// Validate that same port mapping can be reused
listen(80, "port80", false);
expectContent(1234, AF_INET, "port80");
// Validate that the connection is immediately reset if the port is not bound on the linux side
expectContent(1234, AF_INET, "");
// Add a ipv6 binding
VERIFY_SUCCEEDED(vm->MapPort(AF_INET6, 1234, 80, false));
// Validate that ipv6 bindings work as well.
listen(80, "port80ipv6", true);
expectContent(1234, AF_INET6, "port80ipv6");
// Unmap the ipv4 port
VERIFY_SUCCEEDED(vm->MapPort(AF_INET, 1234, 80, true));
// Verify that a proper error is returned if the mapping doesn't exist
VERIFY_ARE_EQUAL(vm->MapPort(AF_INET, 1234, 80, true), HRESULT_FROM_WIN32(ERROR_NOT_FOUND));
// Unmap the v6 port
VERIFY_SUCCEEDED(vm->MapPort(AF_INET6, 1234, 80, true));
// Map another port as v6 only
VERIFY_SUCCEEDED(vm->MapPort(AF_INET6, 1235, 81, false));
listen(81, "port81ipv6", true);
expectContent(1235, AF_INET6, "port81ipv6");
expectNotBound(1235, AF_INET);
VERIFY_SUCCEEDED(vm->MapPort(AF_INET6, 1235, 81, true));
VERIFY_ARE_EQUAL(vm->MapPort(AF_INET6, 1235, 81, true), HRESULT_FROM_WIN32(ERROR_NOT_FOUND));
expectNotBound(1235, AF_INET6);
// Create a forking relay and stress test
VERIFY_SUCCEEDED(vm->MapPort(AF_INET, 1234, 80, false));
auto process =
WSLAProcessLauncher{"/usr/bin/socat", {"/usr/bin/socat", "-dd", "TCP-LISTEN:80,fork,reuseaddr", "system:'echo -n OK'"}}
.Launch(*session);
waitForOutput(process.GetStdHandle(2).get(), "listening on");
for (auto i = 0; i < 100; i++)
{
expectContent(1234, AF_INET, "OK");
}
VERIFY_SUCCEEDED(vm->MapPort(AF_INET, 1234, 80, true));
}
TEST_METHOD(StuckVmTermination)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
// Create a 'stuck' process
auto process = WSLAProcessLauncher{"/bin/cat", {"/bin/cat"}, {}, ProcessFlags::Stdin | ProcessFlags::Stdout}.Launch(*session);
// Stop the service
StopWslaService();
}
TEST_METHOD(WindowsMounts)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
wil::com_ptr<IWSLAVirtualMachine> vm;
VERIFY_SUCCEEDED(session->GetVirtualMachine(&vm));
wsl::windows::common::security::ConfigureForCOMImpersonation(vm.get());
auto expectMount = [&](const std::string& target, const std::optional<std::string>& options) {
auto cmd = std::format("set -o pipefail ; findmnt '{}' | tail -n 1", target);
auto result = ExpectCommandResult(session.get(), {"/bin/bash", "-c", cmd}, options.has_value() ? 0 : 1);
const auto& output = result.Output[1];
const auto& error = result.Output[2];
if (result.Code != (options.has_value() ? 0 : 1))
{
LogError("%hs failed. code=%i, output: %hs, error: %hs", cmd.c_str(), result.Code, output.c_str(), error.c_str());
VERIFY_FAIL();
}
if (options.has_value() && !PathMatchSpecA(output.c_str(), options->c_str()))
{
std::wstring message = std::format(L"Output: '{}' didn't match pattern: '{}'", output, options.value());
VERIFY_FAIL(message.c_str());
}
};
auto testFolder = std::filesystem::current_path() / "test-folder";
std::filesystem::create_directories(testFolder);
auto cleanup = wil::scope_exit_log(WI_DIAGNOSTICS_INFO, [&]() { std::filesystem::remove_all(testFolder); });
// Validate writeable mount.
{
VERIFY_SUCCEEDED(vm->MountWindowsFolder(testFolder.c_str(), "/win-path", false));
expectMount("/win-path", "/win-path*9p*rw,relatime,aname=*,cache=5,access=client,msize=65536,trans=fd,rfd=*,wfd=*");
// Validate that mount can't be stacked on each other
VERIFY_ARE_EQUAL(vm->MountWindowsFolder(testFolder.c_str(), "/win-path", false), HRESULT_FROM_WIN32(ERROR_ALREADY_EXISTS));
// Validate that folder is writeable from linux
ExpectCommandResult(session.get(), {"/bin/bash", "-c", "echo -n content > /win-path/file.txt && sync"}, 0);
VERIFY_ARE_EQUAL(ReadFileContent(testFolder / "file.txt"), L"content");
VERIFY_SUCCEEDED(vm->UnmountWindowsFolder("/win-path"));
expectMount("/win-path", {});
}
// Validate read-only mount.
{
VERIFY_SUCCEEDED(vm->MountWindowsFolder(testFolder.c_str(), "/win-path", true));
expectMount("/win-path", "/win-path*9p*rw,relatime,aname=*,cache=5,access=client,msize=65536,trans=fd,rfd=*,wfd=*");
// Validate that folder is not writeable from linux
ExpectCommandResult(session.get(), {"/bin/bash", "-c", "echo -n content > /win-path/file.txt"}, 1);
VERIFY_SUCCEEDED(vm->UnmountWindowsFolder("/win-path"));
expectMount("/win-path", {});
}
// Validate various error paths
{
VERIFY_ARE_EQUAL(vm->MountWindowsFolder(L"relative-path", "/win-path", true), E_INVALIDARG);
VERIFY_ARE_EQUAL(vm->MountWindowsFolder(L"C:\\does-not-exist", "/win-path", true), HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND));
VERIFY_ARE_EQUAL(vm->UnmountWindowsFolder("/not-mounted"), HRESULT_FROM_WIN32(ERROR_NOT_FOUND));
VERIFY_ARE_EQUAL(vm->UnmountWindowsFolder("/proc"), HRESULT_FROM_WIN32(ERROR_NOT_FOUND));
// Validate that folders that are manually unmounted from the guest are handled properly
VERIFY_SUCCEEDED(vm->MountWindowsFolder(testFolder.c_str(), "/win-path", true));
expectMount("/win-path", "/win-path*9p*rw,relatime,aname=*,cache=5,access=client,msize=65536,trans=fd,rfd=*,wfd=*");
ExpectCommandResult(session.get(), {"/usr/bin/umount", "/win-path"}, 0);
VERIFY_SUCCEEDED(vm->UnmountWindowsFolder("/win-path"));
}
}
// This test case validates that no file descriptors are leaked to user processes.
TEST_METHOD(Fd)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
auto result = ExpectCommandResult(
session.get(), {"/bin/bash", "-c", "echo /proc/self/fd/* && (readlink -v /proc/self/fd/* || true)"}, 0);
// Note: fd/0 is opened by readlink to read the actual content of /proc/self/fd.
if (!PathMatchSpecA(result.Output[1].c_str(), "/proc/self/fd/0 /proc/self/fd/1 /proc/self/fd/2\nsocket:[*]\nsocket:[*]\n"))
{
LogInfo("Found additional fds: %hs", result.Output[1].c_str());
VERIFY_FAIL();
}
}
TEST_METHOD(GPU)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.EnableGPU = true;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
wil::com_ptr<IWSLAVirtualMachine> vm;
VERIFY_SUCCEEDED(session->GetVirtualMachine(&vm));
// Validate that the GPU device is available.
ExpectCommandResult(session.get(), {"/bin/bash", "-c", "test -c /dev/dxg"}, 0);
auto expectMount = [&](const std::string& target, const std::optional<std::string>& options) {
auto cmd = std::format("set -o pipefail ; findmnt '{}' | tail -n 1", target);
WSLAProcessLauncher launcher{"/bin/bash", {"/bin/bash", "-c", cmd}};
auto result = launcher.Launch(*session).WaitAndCaptureOutput();
const auto& output = result.Output[1];
const auto& error = result.Output[2];
if (result.Code != (options.has_value() ? 0 : 1))
{
LogError("%hs failed. code=%i, output: %hs, error: %hs", cmd.c_str(), result.Code, output.c_str(), error.c_str());
VERIFY_FAIL();
}
if (options.has_value() && !PathMatchSpecA(output.c_str(), options->c_str()))
{
std::wstring message = std::format(L"Output: '{}' didn't match pattern: '{}'", output, options.value());
VERIFY_FAIL(message.c_str());
}
};
expectMount(
"/usr/lib/wsl/drivers",
"/usr/lib/wsl/drivers*9p*relatime,aname=*,cache=5,access=client,msize=65536,trans=fd,rfd=*,wfd=*");
expectMount("/usr/lib/wsl/lib", "/usr/lib/wsl/lib none*overlay ro,relatime,lowerdir=/usr/lib/wsl/lib/packaged*");
// Validate that the mount points are not writeable.
VERIFY_ARE_EQUAL(RunCommand(session.get(), {"/usr/bin/touch", "/usr/lib/wsl/drivers/test"}).Code, 1L);
VERIFY_ARE_EQUAL(RunCommand(session.get(), {"/usr/bin/touch", "/usr/lib/wsl/lib/test"}).Code, 1L);
// Validate that trying to mount the shares without GPU support disabled fails.
{
settings.EnableGPU = false;
session = CreateSession(settings);
wil::com_ptr<IWSLAVirtualMachine> vm;
VERIFY_SUCCEEDED(session->GetVirtualMachine(&vm));
// Validate that the GPU device is not available.
expectMount("/usr/lib/wsl/drivers", {});
expectMount("/usr/lib/wsl/lib", {});
}
}
TEST_METHOD(Modules)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.RootVhd = testVhd.c_str();
// Use the system distro vhd for modprobe & lsmod.
#ifdef WSL_SYSTEM_DISTRO_PATH
auto rootfs = std::filesystem::path(TEXT(WSL_SYSTEM_DISTRO_PATH));
#else
auto rootfs = std::filesystem::path(wsl::windows::common::wslutil::GetMsiPackagePath().value()) / L"system.vhd";
#endif
settings.RootVhd = rootfs.c_str();
auto session = CreateSession(settings);
// Sanity check.
ExpectCommandResult(session.get(), {"/bin/bash", "-c", "lsmod | grep ^xsk_diag"}, 1);
// Validate that modules can be loaded.
ExpectCommandResult(session.get(), {"/usr/sbin/modprobe", "xsk_diag"}, 0);
// Validate that xsk_diag is now loaded.
ExpectCommandResult(session.get(), {"/bin/bash", "-c", "lsmod | grep ^xsk_diag"}, 0);
}
TEST_METHOD(CreateRootNamespaceProcess)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
// Simple case
{
auto result = ExpectCommandResult(session.get(), {"/bin/sh", "-c", "echo OK"}, 0);
VERIFY_ARE_EQUAL(result.Output[1], "OK\n");
VERIFY_ARE_EQUAL(result.Output[2], "");
}
// Stdout + stderr
{
auto result = ExpectCommandResult(session.get(), {"/bin/sh", "-c", "echo stdout && (echo stderr 1>& 2)"}, 0);
VERIFY_ARE_EQUAL(result.Output[1], "stdout\n");
VERIFY_ARE_EQUAL(result.Output[2], "stderr\n");
}
// Write a large stdin buffer and expect it back on stdout.
{
std::vector<char> largeBuffer;
std::string pattern = "ExpectedBufferContent";
for (size_t i = 0; i < 1024 * 1024; i++)
{
largeBuffer.insert(largeBuffer.end(), pattern.begin(), pattern.end());
}
WSLAProcessLauncher launcher(
"/bin/sh", {"/bin/sh", "-c", "cat && (echo completed 1>& 2)"}, {}, ProcessFlags::Stdin | ProcessFlags::Stdout | ProcessFlags::Stderr);
auto process = launcher.Launch(*session);
std::unique_ptr<OverlappedIOHandle> writeStdin(new WriteHandle(process.GetStdHandle(0), largeBuffer));
std::vector<std::unique_ptr<OverlappedIOHandle>> extraHandles;
extraHandles.emplace_back(std::move(writeStdin));
auto result = process.WaitAndCaptureOutput(INFINITE, std::move(extraHandles));
VERIFY_IS_TRUE(std::equal(largeBuffer.begin(), largeBuffer.end(), result.Output[1].begin(), result.Output[1].end()));
VERIFY_ARE_EQUAL(result.Output[2], "completed\n");
}
// Create a stuck process and kill it.
{
WSLAProcessLauncher launcher("/bin/cat", {"/bin/cat"}, {}, ProcessFlags::Stdin | ProcessFlags::Stdout | ProcessFlags::Stderr);
auto process = launcher.Launch(*session);
// Try to send invalid signal to the process
VERIFY_ARE_EQUAL(process.Get().Signal(9999), E_FAIL);
// Send SIGKILL(9) to the process.
VERIFY_SUCCEEDED(process.Get().Signal(9));
auto result = process.WaitAndCaptureOutput();
VERIFY_ARE_EQUAL(result.Code, 9);
VERIFY_ARE_EQUAL(result.Signalled, true);
VERIFY_ARE_EQUAL(result.Output[1], "");
VERIFY_ARE_EQUAL(result.Output[2], "");
// Validate that process can't be signalled after it exited.
VERIFY_ARE_EQUAL(process.Get().Signal(9), HRESULT_FROM_WIN32(ERROR_INVALID_STATE));
}
// Validate that errno is correctly propagated
{
WSLAProcessLauncher launcher("doesnotexist", {});
auto [hresult, error, process] = launcher.LaunchNoThrow(*session);
VERIFY_ARE_EQUAL(hresult, E_FAIL);
VERIFY_ARE_EQUAL(error, 2); // ENOENT
VERIFY_IS_FALSE(process.has_value());
}
{
WSLAProcessLauncher launcher("/", {});
auto [hresult, error, process] = launcher.LaunchNoThrow(*session);
VERIFY_ARE_EQUAL(hresult, E_FAIL);
VERIFY_ARE_EQUAL(error, 13); // EACCESS
VERIFY_IS_FALSE(process.has_value());
}
{
WSLAProcessLauncher launcher("/bin/cat", {"/bin/cat"}, {}, ProcessFlags::Stdin | ProcessFlags::Stdout | ProcessFlags::Stderr);
auto process = launcher.Launch(*session);
auto dummyHandle = process.GetStdHandle(1);
// Verify that the same handle can only be acquired once.
VERIFY_ARE_EQUAL(process.Get().GetStdHandle(1, reinterpret_cast<ULONG*>(&dummyHandle)), HRESULT_FROM_WIN32(ERROR_INVALID_STATE));
// Verify that trying to acquire a std handle that doesn't exist fails as expected.
VERIFY_ARE_EQUAL(process.Get().GetStdHandle(3, reinterpret_cast<ULONG*>(&dummyHandle)), HRESULT_FROM_WIN32(ERROR_NOT_FOUND));
// Validate that the process object correctly handle requests after the VM has terminated.
VERIFY_SUCCEEDED(session->Shutdown(30 * 1000));
VERIFY_ARE_EQUAL(process.Get().Signal(9), HRESULT_FROM_WIN32(ERROR_INVALID_STATE));
}
{
// Validate that new processes cannot be created after the VM is terminated.
const char* executable = "dummy";
WSLA_PROCESS_OPTIONS options{};
options.CommandLine = &executable;
options.Executable = executable;
options.CommandLineCount = 1;
wil::com_ptr<IWSLAProcess> process;
int error{};
VERIFY_ARE_EQUAL(session->CreateRootNamespaceProcess(&options, &process, &error), HRESULT_FROM_WIN32(ERROR_INVALID_STATE));
VERIFY_ARE_EQUAL(error, -1);
}
}
TEST_METHOD(CrashDumpCollection)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
int processId = 0;
// Cache the existing crash dumps so we can check that a new one is created.
auto crashDumpsDir = std::filesystem::temp_directory_path() / "wsla-crashes";
std::set<std::filesystem::path> existingDumps;
if (std::filesystem::exists(crashDumpsDir))
{
existingDumps = {std::filesystem::directory_iterator(crashDumpsDir), std::filesystem::directory_iterator{}};
}
// Create a stuck process and crash it.
{
WSLAProcessLauncher launcher("/bin/cat", {"/bin/cat"}, {}, ProcessFlags::Stdin | ProcessFlags::Stdout | ProcessFlags::Stderr);
auto process = launcher.Launch(*session);
// Get the process id. This is need to identify the crash dump file.
VERIFY_SUCCEEDED(process.Get().GetPid(&processId));
// Send SIGSEV(11) to crash the process.
VERIFY_SUCCEEDED(process.Get().Signal(11));
auto result = process.WaitAndCaptureOutput();
VERIFY_ARE_EQUAL(result.Code, 11);
VERIFY_ARE_EQUAL(result.Signalled, true);
VERIFY_ARE_EQUAL(result.Output[1], "");
VERIFY_ARE_EQUAL(result.Output[2], "");
VERIFY_ARE_EQUAL(process.Get().Signal(9), HRESULT_FROM_WIN32(ERROR_INVALID_STATE));
}
// Dumps files are named with the format: wsl-crash-<sessionId>-<pid>-<processname>-<code>.dmp
// Check if a new file was added in crashDumpsDir matching the pattern and not in existingDumps.
std::string expectedPattern = std::format("wsl-crash-*-{}-_usr_bin_cat-11.dmp", processId);
auto dumpFile = wsl::shared::retry::RetryWithTimeout<std::filesystem::path>(
[crashDumpsDir, expectedPattern, existingDumps]() {
for (const auto& entry : std::filesystem::directory_iterator(crashDumpsDir))
{
const auto& filePath = entry.path();
if (existingDumps.find(filePath) == existingDumps.end() &&
PathMatchSpecA(filePath.filename().string().c_str(), expectedPattern.c_str()))
{
return filePath;
}
}
throw wil::ResultException(HRESULT_FROM_WIN32(ERROR_NOT_FOUND));
},
std::chrono::milliseconds{100},
std::chrono::seconds{10});
// Ensure that the dump file is cleaned up after test completion.
auto cleanup = wil::scope_exit([&] {
if (std::filesystem::exists(dumpFile))
{
std::filesystem::remove(dumpFile);
}
});
VERIFY_IS_TRUE(std::filesystem::exists(dumpFile));
VERIFY_IS_TRUE(std::filesystem::file_size(dumpFile) > 0);
}
TEST_METHOD(VhdFormatting)
{
WSL2_TEST_ONLY();
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
settings.RootVhd = testVhd.c_str();
auto session = CreateSession(settings);
constexpr auto formatedVhd = L"test-format-vhd.vhdx";
// TODO: Replace this by a proper SDK method once it exists
auto tokenInfo = wil::get_token_information<TOKEN_USER>();
wsl::core::filesystem::CreateVhd(formatedVhd, 100 * 1024 * 1024, tokenInfo->User.Sid, false, false);
auto cleanup = wil::scope_exit_log(WI_DIAGNOSTICS_INFO, [&]() {
LOG_IF_FAILED(session->Shutdown(30 * 1000));
LOG_IF_WIN32_BOOL_FALSE(DeleteFileW(formatedVhd));
});
// Format the disk.
auto absoluteVhdPath = std::filesystem::absolute(formatedVhd).wstring();
VERIFY_SUCCEEDED(session->FormatVirtualDisk(absoluteVhdPath.c_str()));
// Validate error paths.
VERIFY_ARE_EQUAL(session->FormatVirtualDisk(L"DoesNotExist.vhdx"), E_INVALIDARG);
VERIFY_ARE_EQUAL(session->FormatVirtualDisk(L"C:\\DoesNotExist.vhdx"), HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND));
}
TEST_METHOD(CreateContainer)
{
WSL2_TEST_ONLY();
#ifdef _ARM64_
LogSkipped("Skipping CreateContainer test case for ARM64");
return;
#else
auto storageVhd = std::filesystem::current_path() / "storage.vhdx";
// Create a 1G temporary VHD.
if (!std::filesystem::exists(storageVhd))
{
wsl::core::filesystem::CreateVhd(storageVhd.native().c_str(), 1024 * 1024 * 1024, nullptr, true, false);
}
auto cleanup = wil::scope_exit_log(WI_DIAGNOSTICS_INFO, [&]() { LOG_IF_WIN32_BOOL_FALSE(DeleteFileW(storageVhd.c_str())); });
VIRTUAL_MACHINE_SETTINGS settings{};
settings.CpuCount = 4;
settings.DisplayName = L"WSLA";
settings.MemoryMb = 2048;
settings.BootTimeoutMs = 30 * 1000;
auto installedVhdPath =
std::filesystem::path(wsl::windows::common::wslutil::GetMsiPackagePath().value()) / L"wslarootfs.vhd";
#ifdef WSL_DEV_INSTALL_PATH
settings.RootVhd = TEXT(WSLA_TEST_DISTRO_PATH);
#else
settings.RootVhd = installedVhdPath.c_str();
#endif
settings.RootVhdType = "squashfs";
settings.NetworkingMode = WSLANetworkingModeNAT;
settings.ContainerRootVhd = storageVhd.c_str();
settings.FormatContainerRootVhd = true;
auto session = CreateSession(settings);
// TODO: Remove once the proper rootfs VHD is available.
ExpectCommandResult(session.get(), {"/etc/lsw-init.sh"}, 0);
// Test a simple container start.
{
WSLAContainerLauncher launcher("debian:latest", "test-simple", "echo", {"OK"});
auto container = launcher.Launch(*session);
auto process = container.GetInitProcess();
ValidateProcessOutput(process, {{1, "OK\n"}});
}
// Validate that env is correctly wired.
{
WSLAContainerLauncher launcher("debian:latest", "test-env", "/bin/bash", {"-c", "echo $testenv"}, {{"testenv=testvalue"}});
auto container = launcher.Launch(*session);
auto process = container.GetInitProcess();
ValidateProcessOutput(process, {{1, "testvalue\n"}});
}
// Validate that starting containers works with the default entrypoint and content on stdin
{
WSLAContainerLauncher launcher(
"debian:latest", "test-default-entrypoint", "/bin/cat", {}, {}, ProcessFlags::Stdin | ProcessFlags::Stdout | ProcessFlags::Stderr);
// For now, validate that trying to use stdin without a tty returns the appropriate error.
auto container = launcher.Launch(*session);
// TODO: nerdctl hangs if stdin is closed without writing to it.
// Add test coverage for that usecase once the hang is fixed.
auto process = container.GetInitProcess();
auto input = process.GetStdHandle(0);
std::string shellInput = "foo";
std::vector<char> inputBuffer{shellInput.begin(), shellInput.end()};
std::unique_ptr<OverlappedIOHandle> writeStdin(new WriteHandle(std::move(input), inputBuffer));
std::vector<std::unique_ptr<OverlappedIOHandle>> extraHandles;
extraHandles.emplace_back(std::move(writeStdin));
auto result = process.WaitAndCaptureOutput(INFINITE, std::move(extraHandles));
VERIFY_ARE_EQUAL(result.Output[2], "");
VERIFY_ARE_EQUAL(result.Output[1], "foo");
}
// Validate that stdin is empty if ProcessFlags::Stdin is not passed.
{
WSLAContainerLauncher launcher("debian:latest", "test-stdin", "/bin/cat");
auto container = launcher.Launch(*session);
auto process = container.GetInitProcess();
ValidateProcessOutput(process, {{1, ""}});
}
#endif
}
};
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