mirror of
https://github.com/tailscale/tailscale.git
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148 lines
3.9 KiB
Go
148 lines
3.9 KiB
Go
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package winutil
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import (
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"fmt"
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"os/user"
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"path/filepath"
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"strings"
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"testing"
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"time"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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const oldFashionedCleanupExitCode = 7778
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// oldFashionedCleanup cleans up any outstanding binaries using older APIs.
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// This would be necessary if the restart manager were to fail during the test.
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func oldFashionedCleanup(t *testing.T, binary string) {
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snap, err := windows.CreateToolhelp32Snapshot(windows.TH32CS_SNAPPROCESS, 0)
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if err != nil {
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t.Logf("CreateToolhelp32Snapshot failed: %v", err)
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}
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defer windows.CloseHandle(snap)
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binary = filepath.Clean(binary)
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binbase := filepath.Base(binary)
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pe := windows.ProcessEntry32{
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Size: uint32(unsafe.Sizeof(windows.ProcessEntry32{})),
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}
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for perr := windows.Process32First(snap, &pe); perr == nil; perr = windows.Process32Next(snap, &pe) {
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curBin := windows.UTF16ToString(pe.ExeFile[:])
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// Coarse check against the leaf name of the binary
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if !strings.EqualFold(binbase, curBin) {
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continue
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}
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proc, err := windows.OpenProcess(windows.PROCESS_QUERY_LIMITED_INFORMATION|windows.PROCESS_TERMINATE, false, pe.ProcessID)
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if err != nil {
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t.Logf("OpenProcess failed: %v", err)
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continue
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}
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defer windows.CloseHandle(proc)
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img, err := ProcessImageName(proc)
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if err != nil {
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t.Logf("ProcessImageName failed: %v", err)
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continue
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}
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// Now check that their fully-qualified paths match.
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if !strings.EqualFold(binary, filepath.Clean(img)) {
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continue
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}
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t.Logf("Found leftover pid %d, terminating...", pe.ProcessID)
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if err := windows.TerminateProcess(proc, oldFashionedCleanupExitCode); err != nil && err != windows.ERROR_ACCESS_DENIED {
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t.Logf("TerminateProcess failed: %v", err)
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}
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}
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}
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func testRestartableProcessesImpl(N int, t *testing.T) {
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const binary = "testrestartableprocesses"
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fq := pathToTestProg(t, binary)
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for i := 0; i < N; i++ {
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startTestProg(t, binary, "RestartableProcess")
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}
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t.Cleanup(func() {
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oldFashionedCleanup(t, fq)
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})
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logf := func(format string, args ...any) {
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t.Logf(format, args...)
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}
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rms, err := NewRestartManagerSession(logf)
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if err != nil {
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t.Fatalf("NewRestartManagerSession: %v", err)
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}
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defer rms.Close()
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if err := rms.AddPaths([]string{fq}); err != nil {
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t.Fatalf("AddPaths: %v", err)
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}
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ups, err := rms.AffectedProcesses()
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if err != nil {
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t.Fatalf("AffectedProcesses: %v", err)
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}
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rps := NewRestartableProcesses()
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defer rps.Close()
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for _, up := range ups {
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rp, err := up.AsRestartableProcess()
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if err != nil {
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t.Errorf("AsRestartableProcess: %v", err)
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continue
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}
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rps.Add(rp)
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}
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const terminateWithExitCode = 7777
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if err := rps.Terminate(logf, terminateWithExitCode, time.Duration(15)*time.Second); err != nil {
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t.Errorf("Terminate: %v", err)
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}
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for k, v := range rps {
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if v.hasExitCode {
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if v.exitCode != terminateWithExitCode {
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// Not strictly an error, but worth noting.
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logf("Subprocess %d terminated with unexpected exit code %d", k, v.exitCode)
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}
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} else {
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t.Errorf("Subprocess %d did not produce an exit code", k)
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}
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if v.handle != 0 {
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t.Errorf("Subprocess %d is unexpectedly still open", k)
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}
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}
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}
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func TestRestartableProcesses(t *testing.T) {
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u, err := user.Current()
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if err != nil {
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t.Fatalf("Could not obtain current user")
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}
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if u.Uid != localSystemSID {
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t.Skipf("This test must be run as SYSTEM")
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}
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forN := func(fn func(int, *testing.T)) func([]int) {
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return func(ns []int) {
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for _, n := range ns {
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t.Run(fmt.Sprintf("N=%d", n), func(tt *testing.T) { fn(n, tt) })
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}
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}
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}(testRestartableProcessesImpl)
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// Testing indicates that the restart manager cannot handle more than 127 processes (on Windows 10, at least), so we use that as our highest value.
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ns := []int{0, 1, _MAXIMUM_WAIT_OBJECTS - 1, _MAXIMUM_WAIT_OBJECTS, _MAXIMUM_WAIT_OBJECTS + 1, _MAXIMUM_WAIT_OBJECTS*2 - 1}
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forN(ns)
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}
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