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-rw-r--r--src/runtime/syscall_windows_test.go1223
1 files changed, 1223 insertions, 0 deletions
diff --git a/src/runtime/syscall_windows_test.go b/src/runtime/syscall_windows_test.go
new file mode 100644
index 0000000..fb215b3
--- /dev/null
+++ b/src/runtime/syscall_windows_test.go
@@ -0,0 +1,1223 @@
+// Copyright 2010 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.
+
+package runtime_test
+
+import (
+ "bytes"
+ "fmt"
+ "internal/syscall/windows/sysdll"
+ "internal/testenv"
+ "io"
+ "math"
+ "os"
+ "os/exec"
+ "path/filepath"
+ "reflect"
+ "runtime"
+ "strconv"
+ "strings"
+ "syscall"
+ "testing"
+ "unsafe"
+)
+
+type DLL struct {
+ *syscall.DLL
+ t *testing.T
+}
+
+func GetDLL(t *testing.T, name string) *DLL {
+ d, e := syscall.LoadDLL(name)
+ if e != nil {
+ t.Fatal(e)
+ }
+ return &DLL{DLL: d, t: t}
+}
+
+func (d *DLL) Proc(name string) *syscall.Proc {
+ p, e := d.FindProc(name)
+ if e != nil {
+ d.t.Fatal(e)
+ }
+ return p
+}
+
+func TestStdCall(t *testing.T) {
+ type Rect struct {
+ left, top, right, bottom int32
+ }
+ res := Rect{}
+ expected := Rect{1, 1, 40, 60}
+ a, _, _ := GetDLL(t, "user32.dll").Proc("UnionRect").Call(
+ uintptr(unsafe.Pointer(&res)),
+ uintptr(unsafe.Pointer(&Rect{10, 1, 14, 60})),
+ uintptr(unsafe.Pointer(&Rect{1, 2, 40, 50})))
+ if a != 1 || res.left != expected.left ||
+ res.top != expected.top ||
+ res.right != expected.right ||
+ res.bottom != expected.bottom {
+ t.Error("stdcall USER32.UnionRect returns", a, "res=", res)
+ }
+}
+
+func Test64BitReturnStdCall(t *testing.T) {
+
+ const (
+ VER_BUILDNUMBER = 0x0000004
+ VER_MAJORVERSION = 0x0000002
+ VER_MINORVERSION = 0x0000001
+ VER_PLATFORMID = 0x0000008
+ VER_PRODUCT_TYPE = 0x0000080
+ VER_SERVICEPACKMAJOR = 0x0000020
+ VER_SERVICEPACKMINOR = 0x0000010
+ VER_SUITENAME = 0x0000040
+
+ VER_EQUAL = 1
+ VER_GREATER = 2
+ VER_GREATER_EQUAL = 3
+ VER_LESS = 4
+ VER_LESS_EQUAL = 5
+
+ ERROR_OLD_WIN_VERSION syscall.Errno = 1150
+ )
+
+ type OSVersionInfoEx struct {
+ OSVersionInfoSize uint32
+ MajorVersion uint32
+ MinorVersion uint32
+ BuildNumber uint32
+ PlatformId uint32
+ CSDVersion [128]uint16
+ ServicePackMajor uint16
+ ServicePackMinor uint16
+ SuiteMask uint16
+ ProductType byte
+ Reserve byte
+ }
+
+ d := GetDLL(t, "kernel32.dll")
+
+ var m1, m2 uintptr
+ VerSetConditionMask := d.Proc("VerSetConditionMask")
+ m1, m2, _ = VerSetConditionMask.Call(m1, m2, VER_MAJORVERSION, VER_GREATER_EQUAL)
+ m1, m2, _ = VerSetConditionMask.Call(m1, m2, VER_MINORVERSION, VER_GREATER_EQUAL)
+ m1, m2, _ = VerSetConditionMask.Call(m1, m2, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL)
+ m1, m2, _ = VerSetConditionMask.Call(m1, m2, VER_SERVICEPACKMINOR, VER_GREATER_EQUAL)
+
+ vi := OSVersionInfoEx{
+ MajorVersion: 5,
+ MinorVersion: 1,
+ ServicePackMajor: 2,
+ ServicePackMinor: 0,
+ }
+ vi.OSVersionInfoSize = uint32(unsafe.Sizeof(vi))
+ r, _, e2 := d.Proc("VerifyVersionInfoW").Call(
+ uintptr(unsafe.Pointer(&vi)),
+ VER_MAJORVERSION|VER_MINORVERSION|VER_SERVICEPACKMAJOR|VER_SERVICEPACKMINOR,
+ m1, m2)
+ if r == 0 && e2 != ERROR_OLD_WIN_VERSION {
+ t.Errorf("VerifyVersionInfo failed: %s", e2)
+ }
+}
+
+func TestCDecl(t *testing.T) {
+ var buf [50]byte
+ fmtp, _ := syscall.BytePtrFromString("%d %d %d")
+ a, _, _ := GetDLL(t, "user32.dll").Proc("wsprintfA").Call(
+ uintptr(unsafe.Pointer(&buf[0])),
+ uintptr(unsafe.Pointer(fmtp)),
+ 1000, 2000, 3000)
+ if string(buf[:a]) != "1000 2000 3000" {
+ t.Error("cdecl USER32.wsprintfA returns", a, "buf=", buf[:a])
+ }
+}
+
+func TestEnumWindows(t *testing.T) {
+ d := GetDLL(t, "user32.dll")
+ isWindows := d.Proc("IsWindow")
+ counter := 0
+ cb := syscall.NewCallback(func(hwnd syscall.Handle, lparam uintptr) uintptr {
+ if lparam != 888 {
+ t.Error("lparam was not passed to callback")
+ }
+ b, _, _ := isWindows.Call(uintptr(hwnd))
+ if b == 0 {
+ t.Error("USER32.IsWindow returns FALSE")
+ }
+ counter++
+ return 1 // continue enumeration
+ })
+ a, _, _ := d.Proc("EnumWindows").Call(cb, 888)
+ if a == 0 {
+ t.Error("USER32.EnumWindows returns FALSE")
+ }
+ if counter == 0 {
+ t.Error("Callback has been never called or your have no windows")
+ }
+}
+
+func callback(timeFormatString unsafe.Pointer, lparam uintptr) uintptr {
+ (*(*func())(unsafe.Pointer(&lparam)))()
+ return 0 // stop enumeration
+}
+
+// nestedCall calls into Windows, back into Go, and finally to f.
+func nestedCall(t *testing.T, f func()) {
+ c := syscall.NewCallback(callback)
+ d := GetDLL(t, "kernel32.dll")
+ defer d.Release()
+ const LOCALE_NAME_USER_DEFAULT = 0
+ d.Proc("EnumTimeFormatsEx").Call(c, LOCALE_NAME_USER_DEFAULT, 0, uintptr(*(*unsafe.Pointer)(unsafe.Pointer(&f))))
+}
+
+func TestCallback(t *testing.T) {
+ var x = false
+ nestedCall(t, func() { x = true })
+ if !x {
+ t.Fatal("nestedCall did not call func")
+ }
+}
+
+func TestCallbackGC(t *testing.T) {
+ nestedCall(t, runtime.GC)
+}
+
+func TestCallbackPanicLocked(t *testing.T) {
+ runtime.LockOSThread()
+ defer runtime.UnlockOSThread()
+
+ if !runtime.LockedOSThread() {
+ t.Fatal("runtime.LockOSThread didn't")
+ }
+ defer func() {
+ s := recover()
+ if s == nil {
+ t.Fatal("did not panic")
+ }
+ if s.(string) != "callback panic" {
+ t.Fatal("wrong panic:", s)
+ }
+ if !runtime.LockedOSThread() {
+ t.Fatal("lost lock on OS thread after panic")
+ }
+ }()
+ nestedCall(t, func() { panic("callback panic") })
+ panic("nestedCall returned")
+}
+
+func TestCallbackPanic(t *testing.T) {
+ // Make sure panic during callback unwinds properly.
+ if runtime.LockedOSThread() {
+ t.Fatal("locked OS thread on entry to TestCallbackPanic")
+ }
+ defer func() {
+ s := recover()
+ if s == nil {
+ t.Fatal("did not panic")
+ }
+ if s.(string) != "callback panic" {
+ t.Fatal("wrong panic:", s)
+ }
+ if runtime.LockedOSThread() {
+ t.Fatal("locked OS thread on exit from TestCallbackPanic")
+ }
+ }()
+ nestedCall(t, func() { panic("callback panic") })
+ panic("nestedCall returned")
+}
+
+func TestCallbackPanicLoop(t *testing.T) {
+ // Make sure we don't blow out m->g0 stack.
+ for i := 0; i < 100000; i++ {
+ TestCallbackPanic(t)
+ }
+}
+
+func TestBlockingCallback(t *testing.T) {
+ c := make(chan int)
+ go func() {
+ for i := 0; i < 10; i++ {
+ c <- <-c
+ }
+ }()
+ nestedCall(t, func() {
+ for i := 0; i < 10; i++ {
+ c <- i
+ if j := <-c; j != i {
+ t.Errorf("out of sync %d != %d", j, i)
+ }
+ }
+ })
+}
+
+func TestCallbackInAnotherThread(t *testing.T) {
+ d := GetDLL(t, "kernel32.dll")
+
+ f := func(p uintptr) uintptr {
+ return p
+ }
+ r, _, err := d.Proc("CreateThread").Call(0, 0, syscall.NewCallback(f), 123, 0, 0)
+ if r == 0 {
+ t.Fatalf("CreateThread failed: %v", err)
+ }
+ h := syscall.Handle(r)
+ defer syscall.CloseHandle(h)
+
+ switch s, err := syscall.WaitForSingleObject(h, 100); s {
+ case syscall.WAIT_OBJECT_0:
+ break
+ case syscall.WAIT_TIMEOUT:
+ t.Fatal("timeout waiting for thread to exit")
+ case syscall.WAIT_FAILED:
+ t.Fatalf("WaitForSingleObject failed: %v", err)
+ default:
+ t.Fatalf("WaitForSingleObject returns unexpected value %v", s)
+ }
+
+ var ec uint32
+ r, _, err = d.Proc("GetExitCodeThread").Call(uintptr(h), uintptr(unsafe.Pointer(&ec)))
+ if r == 0 {
+ t.Fatalf("GetExitCodeThread failed: %v", err)
+ }
+ if ec != 123 {
+ t.Fatalf("expected 123, but got %d", ec)
+ }
+}
+
+type cbFunc struct {
+ goFunc interface{}
+}
+
+func (f cbFunc) cName(cdecl bool) string {
+ name := "stdcall"
+ if cdecl {
+ name = "cdecl"
+ }
+ t := reflect.TypeOf(f.goFunc)
+ for i := 0; i < t.NumIn(); i++ {
+ name += "_" + t.In(i).Name()
+ }
+ return name
+}
+
+func (f cbFunc) cSrc(w io.Writer, cdecl bool) {
+ // Construct a C function that takes a callback with
+ // f.goFunc's signature, and calls it with integers 1..N.
+ funcname := f.cName(cdecl)
+ attr := "__stdcall"
+ if cdecl {
+ attr = "__cdecl"
+ }
+ typename := "t" + funcname
+ t := reflect.TypeOf(f.goFunc)
+ cTypes := make([]string, t.NumIn())
+ cArgs := make([]string, t.NumIn())
+ for i := range cTypes {
+ // We included stdint.h, so this works for all sized
+ // integer types, and uint8Pair_t.
+ cTypes[i] = t.In(i).Name() + "_t"
+ if t.In(i).Name() == "uint8Pair" {
+ cArgs[i] = fmt.Sprintf("(uint8Pair_t){%d,1}", i)
+ } else {
+ cArgs[i] = fmt.Sprintf("%d", i+1)
+ }
+ }
+ fmt.Fprintf(w, `
+typedef uintptr_t %s (*%s)(%s);
+uintptr_t %s(%s f) {
+ return f(%s);
+}
+ `, attr, typename, strings.Join(cTypes, ","), funcname, typename, strings.Join(cArgs, ","))
+}
+
+func (f cbFunc) testOne(t *testing.T, dll *syscall.DLL, cdecl bool, cb uintptr) {
+ r1, _, _ := dll.MustFindProc(f.cName(cdecl)).Call(cb)
+
+ want := 0
+ for i := 0; i < reflect.TypeOf(f.goFunc).NumIn(); i++ {
+ want += i + 1
+ }
+ if int(r1) != want {
+ t.Errorf("wanted result %d; got %d", want, r1)
+ }
+}
+
+type uint8Pair struct{ x, y uint8 }
+
+var cbFuncs = []cbFunc{
+ {func(i1, i2 uintptr) uintptr {
+ return i1 + i2
+ }},
+ {func(i1, i2, i3 uintptr) uintptr {
+ return i1 + i2 + i3
+ }},
+ {func(i1, i2, i3, i4 uintptr) uintptr {
+ return i1 + i2 + i3 + i4
+ }},
+ {func(i1, i2, i3, i4, i5 uintptr) uintptr {
+ return i1 + i2 + i3 + i4 + i5
+ }},
+ {func(i1, i2, i3, i4, i5, i6 uintptr) uintptr {
+ return i1 + i2 + i3 + i4 + i5 + i6
+ }},
+ {func(i1, i2, i3, i4, i5, i6, i7 uintptr) uintptr {
+ return i1 + i2 + i3 + i4 + i5 + i6 + i7
+ }},
+ {func(i1, i2, i3, i4, i5, i6, i7, i8 uintptr) uintptr {
+ return i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8
+ }},
+ {func(i1, i2, i3, i4, i5, i6, i7, i8, i9 uintptr) uintptr {
+ return i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9
+ }},
+
+ // Non-uintptr parameters.
+ {func(i1, i2, i3, i4, i5, i6, i7, i8, i9 uint8) uintptr {
+ return uintptr(i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9)
+ }},
+ {func(i1, i2, i3, i4, i5, i6, i7, i8, i9 uint16) uintptr {
+ return uintptr(i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9)
+ }},
+ {func(i1, i2, i3, i4, i5, i6, i7, i8, i9 int8) uintptr {
+ return uintptr(i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9)
+ }},
+ {func(i1 int8, i2 int16, i3 int32, i4, i5 uintptr) uintptr {
+ return uintptr(i1) + uintptr(i2) + uintptr(i3) + i4 + i5
+ }},
+ {func(i1, i2, i3, i4, i5 uint8Pair) uintptr {
+ return uintptr(i1.x + i1.y + i2.x + i2.y + i3.x + i3.y + i4.x + i4.y + i5.x + i5.y)
+ }},
+}
+
+type cbDLL struct {
+ name string
+ buildArgs func(out, src string) []string
+}
+
+func (d *cbDLL) makeSrc(t *testing.T, path string) {
+ f, err := os.Create(path)
+ if err != nil {
+ t.Fatalf("failed to create source file: %v", err)
+ }
+ defer f.Close()
+
+ fmt.Fprint(f, `
+#include <stdint.h>
+typedef struct { uint8_t x, y; } uint8Pair_t;
+`)
+ for _, cbf := range cbFuncs {
+ cbf.cSrc(f, false)
+ cbf.cSrc(f, true)
+ }
+}
+
+func (d *cbDLL) build(t *testing.T, dir string) string {
+ srcname := d.name + ".c"
+ d.makeSrc(t, filepath.Join(dir, srcname))
+ outname := d.name + ".dll"
+ args := d.buildArgs(outname, srcname)
+ cmd := exec.Command(args[0], args[1:]...)
+ cmd.Dir = dir
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ t.Fatalf("failed to build dll: %v - %v", err, string(out))
+ }
+ return filepath.Join(dir, outname)
+}
+
+var cbDLLs = []cbDLL{
+ {
+ "test",
+ func(out, src string) []string {
+ return []string{"gcc", "-shared", "-s", "-Werror", "-o", out, src}
+ },
+ },
+ {
+ "testO2",
+ func(out, src string) []string {
+ return []string{"gcc", "-shared", "-s", "-Werror", "-o", out, "-O2", src}
+ },
+ },
+}
+
+func TestStdcallAndCDeclCallbacks(t *testing.T) {
+ if _, err := exec.LookPath("gcc"); err != nil {
+ t.Skip("skipping test: gcc is missing")
+ }
+ tmp, err := os.MkdirTemp("", "TestCDeclCallback")
+ if err != nil {
+ t.Fatal("TempDir failed: ", err)
+ }
+ defer os.RemoveAll(tmp)
+
+ for _, dll := range cbDLLs {
+ t.Run(dll.name, func(t *testing.T) {
+ dllPath := dll.build(t, tmp)
+ dll := syscall.MustLoadDLL(dllPath)
+ defer dll.Release()
+ for _, cbf := range cbFuncs {
+ t.Run(cbf.cName(false), func(t *testing.T) {
+ stdcall := syscall.NewCallback(cbf.goFunc)
+ cbf.testOne(t, dll, false, stdcall)
+ })
+ t.Run(cbf.cName(true), func(t *testing.T) {
+ cdecl := syscall.NewCallbackCDecl(cbf.goFunc)
+ cbf.testOne(t, dll, true, cdecl)
+ })
+ }
+ })
+ }
+}
+
+func TestRegisterClass(t *testing.T) {
+ kernel32 := GetDLL(t, "kernel32.dll")
+ user32 := GetDLL(t, "user32.dll")
+ mh, _, _ := kernel32.Proc("GetModuleHandleW").Call(0)
+ cb := syscall.NewCallback(func(hwnd syscall.Handle, msg uint32, wparam, lparam uintptr) (rc uintptr) {
+ t.Fatal("callback should never get called")
+ return 0
+ })
+ type Wndclassex struct {
+ Size uint32
+ Style uint32
+ WndProc uintptr
+ ClsExtra int32
+ WndExtra int32
+ Instance syscall.Handle
+ Icon syscall.Handle
+ Cursor syscall.Handle
+ Background syscall.Handle
+ MenuName *uint16
+ ClassName *uint16
+ IconSm syscall.Handle
+ }
+ name := syscall.StringToUTF16Ptr("test_window")
+ wc := Wndclassex{
+ WndProc: cb,
+ Instance: syscall.Handle(mh),
+ ClassName: name,
+ }
+ wc.Size = uint32(unsafe.Sizeof(wc))
+ a, _, err := user32.Proc("RegisterClassExW").Call(uintptr(unsafe.Pointer(&wc)))
+ if a == 0 {
+ t.Fatalf("RegisterClassEx failed: %v", err)
+ }
+ r, _, err := user32.Proc("UnregisterClassW").Call(uintptr(unsafe.Pointer(name)), 0)
+ if r == 0 {
+ t.Fatalf("UnregisterClass failed: %v", err)
+ }
+}
+
+func TestOutputDebugString(t *testing.T) {
+ d := GetDLL(t, "kernel32.dll")
+ p := syscall.StringToUTF16Ptr("testing OutputDebugString")
+ d.Proc("OutputDebugStringW").Call(uintptr(unsafe.Pointer(p)))
+}
+
+func TestRaiseException(t *testing.T) {
+ o := runTestProg(t, "testprog", "RaiseException")
+ if strings.Contains(o, "RaiseException should not return") {
+ t.Fatalf("RaiseException did not crash program: %v", o)
+ }
+ if !strings.Contains(o, "Exception 0xbad") {
+ t.Fatalf("No stack trace: %v", o)
+ }
+}
+
+func TestZeroDivisionException(t *testing.T) {
+ o := runTestProg(t, "testprog", "ZeroDivisionException")
+ if !strings.Contains(o, "panic: runtime error: integer divide by zero") {
+ t.Fatalf("No stack trace: %v", o)
+ }
+}
+
+func TestWERDialogue(t *testing.T) {
+ if os.Getenv("TESTING_WER_DIALOGUE") == "1" {
+ defer os.Exit(0)
+
+ *runtime.TestingWER = true
+ const EXCEPTION_NONCONTINUABLE = 1
+ mod := syscall.MustLoadDLL("kernel32.dll")
+ proc := mod.MustFindProc("RaiseException")
+ proc.Call(0xbad, EXCEPTION_NONCONTINUABLE, 0, 0)
+ println("RaiseException should not return")
+ return
+ }
+ cmd := exec.Command(os.Args[0], "-test.run=TestWERDialogue")
+ cmd.Env = []string{"TESTING_WER_DIALOGUE=1"}
+ // Child process should not open WER dialogue, but return immediately instead.
+ cmd.CombinedOutput()
+}
+
+func TestWindowsStackMemory(t *testing.T) {
+ o := runTestProg(t, "testprog", "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)
+ }
+}
+
+var used byte
+
+func use(buf []byte) {
+ for _, c := range buf {
+ used += c
+ }
+}
+
+func forceStackCopy() (r int) {
+ var f func(int) int
+ f = func(i int) int {
+ var buf [256]byte
+ use(buf[:])
+ if i == 0 {
+ return 0
+ }
+ return i + f(i-1)
+ }
+ r = f(128)
+ return
+}
+
+func TestReturnAfterStackGrowInCallback(t *testing.T) {
+ if _, err := exec.LookPath("gcc"); err != nil {
+ t.Skip("skipping test: gcc is missing")
+ }
+
+ const src = `
+#include <stdint.h>
+#include <windows.h>
+
+typedef uintptr_t __stdcall (*callback)(uintptr_t);
+
+uintptr_t cfunc(callback f, uintptr_t n) {
+ uintptr_t r;
+ r = f(n);
+ SetLastError(333);
+ return r;
+}
+`
+ tmpdir, err := os.MkdirTemp("", "TestReturnAfterStackGrowInCallback")
+ if err != nil {
+ t.Fatal("TempDir failed: ", err)
+ }
+ defer os.RemoveAll(tmpdir)
+
+ srcname := "mydll.c"
+ err = os.WriteFile(filepath.Join(tmpdir, srcname), []byte(src), 0)
+ if err != nil {
+ t.Fatal(err)
+ }
+ outname := "mydll.dll"
+ cmd := exec.Command("gcc", "-shared", "-s", "-Werror", "-o", outname, srcname)
+ cmd.Dir = tmpdir
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ t.Fatalf("failed to build dll: %v - %v", err, string(out))
+ }
+ dllpath := filepath.Join(tmpdir, outname)
+
+ dll := syscall.MustLoadDLL(dllpath)
+ defer dll.Release()
+
+ proc := dll.MustFindProc("cfunc")
+
+ cb := syscall.NewCallback(func(n uintptr) uintptr {
+ forceStackCopy()
+ return n
+ })
+
+ // Use a new goroutine so that we get a small stack.
+ type result struct {
+ r uintptr
+ err syscall.Errno
+ }
+ want := result{
+ // Make it large enough to test issue #29331.
+ r: (^uintptr(0)) >> 24,
+ err: 333,
+ }
+ c := make(chan result)
+ go func() {
+ r, _, err := proc.Call(cb, want.r)
+ c <- result{r, err.(syscall.Errno)}
+ }()
+ if got := <-c; got != want {
+ t.Errorf("got %d want %d", got, want)
+ }
+}
+
+func TestFloatArgs(t *testing.T) {
+ if _, err := exec.LookPath("gcc"); err != nil {
+ t.Skip("skipping test: gcc is missing")
+ }
+ if runtime.GOARCH != "amd64" {
+ t.Skipf("skipping test: GOARCH=%s", runtime.GOARCH)
+ }
+
+ const src = `
+#include <stdint.h>
+#include <windows.h>
+
+uintptr_t cfunc(uintptr_t a, double b, float c, double d) {
+ if (a == 1 && b == 2.2 && c == 3.3f && d == 4.4e44) {
+ return 1;
+ }
+ return 0;
+}
+`
+ tmpdir, err := os.MkdirTemp("", "TestFloatArgs")
+ if err != nil {
+ t.Fatal("TempDir failed: ", err)
+ }
+ defer os.RemoveAll(tmpdir)
+
+ srcname := "mydll.c"
+ err = os.WriteFile(filepath.Join(tmpdir, srcname), []byte(src), 0)
+ if err != nil {
+ t.Fatal(err)
+ }
+ outname := "mydll.dll"
+ cmd := exec.Command("gcc", "-shared", "-s", "-Werror", "-o", outname, srcname)
+ cmd.Dir = tmpdir
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ t.Fatalf("failed to build dll: %v - %v", err, string(out))
+ }
+ dllpath := filepath.Join(tmpdir, outname)
+
+ dll := syscall.MustLoadDLL(dllpath)
+ defer dll.Release()
+
+ proc := dll.MustFindProc("cfunc")
+
+ r, _, err := proc.Call(
+ 1,
+ uintptr(math.Float64bits(2.2)),
+ uintptr(math.Float32bits(3.3)),
+ uintptr(math.Float64bits(4.4e44)),
+ )
+ if r != 1 {
+ t.Errorf("got %d want 1 (err=%v)", r, err)
+ }
+}
+
+func TestFloatReturn(t *testing.T) {
+ if _, err := exec.LookPath("gcc"); err != nil {
+ t.Skip("skipping test: gcc is missing")
+ }
+ if runtime.GOARCH != "amd64" {
+ t.Skipf("skipping test: GOARCH=%s", runtime.GOARCH)
+ }
+
+ const src = `
+#include <stdint.h>
+#include <windows.h>
+
+float cfuncFloat(uintptr_t a, double b, float c, double d) {
+ if (a == 1 && b == 2.2 && c == 3.3f && d == 4.4e44) {
+ return 1.5f;
+ }
+ return 0;
+}
+
+double cfuncDouble(uintptr_t a, double b, float c, double d) {
+ if (a == 1 && b == 2.2 && c == 3.3f && d == 4.4e44) {
+ return 2.5;
+ }
+ return 0;
+}
+`
+ tmpdir, err := os.MkdirTemp("", "TestFloatReturn")
+ if err != nil {
+ t.Fatal("TempDir failed: ", err)
+ }
+ defer os.RemoveAll(tmpdir)
+
+ srcname := "mydll.c"
+ err = os.WriteFile(filepath.Join(tmpdir, srcname), []byte(src), 0)
+ if err != nil {
+ t.Fatal(err)
+ }
+ outname := "mydll.dll"
+ cmd := exec.Command("gcc", "-shared", "-s", "-Werror", "-o", outname, srcname)
+ cmd.Dir = tmpdir
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ t.Fatalf("failed to build dll: %v - %v", err, string(out))
+ }
+ dllpath := filepath.Join(tmpdir, outname)
+
+ dll := syscall.MustLoadDLL(dllpath)
+ defer dll.Release()
+
+ proc := dll.MustFindProc("cfuncFloat")
+
+ _, r, err := proc.Call(
+ 1,
+ uintptr(math.Float64bits(2.2)),
+ uintptr(math.Float32bits(3.3)),
+ uintptr(math.Float64bits(4.4e44)),
+ )
+ fr := math.Float32frombits(uint32(r))
+ if fr != 1.5 {
+ t.Errorf("got %f want 1.5 (err=%v)", fr, err)
+ }
+
+ proc = dll.MustFindProc("cfuncDouble")
+
+ _, r, err = proc.Call(
+ 1,
+ uintptr(math.Float64bits(2.2)),
+ uintptr(math.Float32bits(3.3)),
+ uintptr(math.Float64bits(4.4e44)),
+ )
+ dr := math.Float64frombits(uint64(r))
+ if dr != 2.5 {
+ t.Errorf("got %f want 2.5 (err=%v)", dr, err)
+ }
+}
+
+func TestTimeBeginPeriod(t *testing.T) {
+ const TIMERR_NOERROR = 0
+ if *runtime.TimeBeginPeriodRetValue != TIMERR_NOERROR {
+ t.Fatalf("timeBeginPeriod failed: it returned %d", *runtime.TimeBeginPeriodRetValue)
+ }
+}
+
+// removeOneCPU removes one (any) cpu from affinity mask.
+// It returns new affinity mask.
+func removeOneCPU(mask uintptr) (uintptr, error) {
+ if mask == 0 {
+ return 0, fmt.Errorf("cpu affinity mask is empty")
+ }
+ maskbits := int(unsafe.Sizeof(mask) * 8)
+ for i := 0; i < maskbits; i++ {
+ newmask := mask & ^(1 << uint(i))
+ if newmask != mask {
+ return newmask, nil
+ }
+
+ }
+ panic("not reached")
+}
+
+func resumeChildThread(kernel32 *syscall.DLL, childpid int) error {
+ _OpenThread := kernel32.MustFindProc("OpenThread")
+ _ResumeThread := kernel32.MustFindProc("ResumeThread")
+ _Thread32First := kernel32.MustFindProc("Thread32First")
+ _Thread32Next := kernel32.MustFindProc("Thread32Next")
+
+ snapshot, err := syscall.CreateToolhelp32Snapshot(syscall.TH32CS_SNAPTHREAD, 0)
+ if err != nil {
+ return err
+ }
+ defer syscall.CloseHandle(snapshot)
+
+ const _THREAD_SUSPEND_RESUME = 0x0002
+
+ type ThreadEntry32 struct {
+ Size uint32
+ tUsage uint32
+ ThreadID uint32
+ OwnerProcessID uint32
+ BasePri int32
+ DeltaPri int32
+ Flags uint32
+ }
+
+ var te ThreadEntry32
+ te.Size = uint32(unsafe.Sizeof(te))
+ ret, _, err := _Thread32First.Call(uintptr(snapshot), uintptr(unsafe.Pointer(&te)))
+ if ret == 0 {
+ return err
+ }
+ for te.OwnerProcessID != uint32(childpid) {
+ ret, _, err = _Thread32Next.Call(uintptr(snapshot), uintptr(unsafe.Pointer(&te)))
+ if ret == 0 {
+ return err
+ }
+ }
+ h, _, err := _OpenThread.Call(_THREAD_SUSPEND_RESUME, 1, uintptr(te.ThreadID))
+ if h == 0 {
+ return err
+ }
+ defer syscall.Close(syscall.Handle(h))
+
+ ret, _, err = _ResumeThread.Call(h)
+ if ret == 0xffffffff {
+ return err
+ }
+ return nil
+}
+
+func TestNumCPU(t *testing.T) {
+ if os.Getenv("GO_WANT_HELPER_PROCESS") == "1" {
+ // in child process
+ fmt.Fprintf(os.Stderr, "%d", runtime.NumCPU())
+ os.Exit(0)
+ }
+
+ switch n := runtime.NumberOfProcessors(); {
+ case n < 1:
+ t.Fatalf("system cannot have %d cpu(s)", n)
+ case n == 1:
+ if runtime.NumCPU() != 1 {
+ t.Fatalf("runtime.NumCPU() returns %d on single cpu system", runtime.NumCPU())
+ }
+ return
+ }
+
+ const (
+ _CREATE_SUSPENDED = 0x00000004
+ _PROCESS_ALL_ACCESS = syscall.STANDARD_RIGHTS_REQUIRED | syscall.SYNCHRONIZE | 0xfff
+ )
+
+ kernel32 := syscall.MustLoadDLL("kernel32.dll")
+ _GetProcessAffinityMask := kernel32.MustFindProc("GetProcessAffinityMask")
+ _SetProcessAffinityMask := kernel32.MustFindProc("SetProcessAffinityMask")
+
+ cmd := exec.Command(os.Args[0], "-test.run=TestNumCPU")
+ cmd.Env = append(os.Environ(), "GO_WANT_HELPER_PROCESS=1")
+ var buf bytes.Buffer
+ cmd.Stdout = &buf
+ cmd.Stderr = &buf
+ cmd.SysProcAttr = &syscall.SysProcAttr{CreationFlags: _CREATE_SUSPENDED}
+ err := cmd.Start()
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer func() {
+ err = cmd.Wait()
+ childOutput := string(buf.Bytes())
+ if err != nil {
+ t.Fatalf("child failed: %v: %v", err, childOutput)
+ }
+ // removeOneCPU should have decreased child cpu count by 1
+ want := fmt.Sprintf("%d", runtime.NumCPU()-1)
+ if childOutput != want {
+ t.Fatalf("child output: want %q, got %q", want, childOutput)
+ }
+ }()
+
+ defer func() {
+ err = resumeChildThread(kernel32, cmd.Process.Pid)
+ if err != nil {
+ t.Fatal(err)
+ }
+ }()
+
+ ph, err := syscall.OpenProcess(_PROCESS_ALL_ACCESS, false, uint32(cmd.Process.Pid))
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer syscall.CloseHandle(ph)
+
+ var mask, sysmask uintptr
+ ret, _, err := _GetProcessAffinityMask.Call(uintptr(ph), uintptr(unsafe.Pointer(&mask)), uintptr(unsafe.Pointer(&sysmask)))
+ if ret == 0 {
+ t.Fatal(err)
+ }
+
+ newmask, err := removeOneCPU(mask)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ ret, _, err = _SetProcessAffinityMask.Call(uintptr(ph), newmask)
+ if ret == 0 {
+ t.Fatal(err)
+ }
+ ret, _, err = _GetProcessAffinityMask.Call(uintptr(ph), uintptr(unsafe.Pointer(&mask)), uintptr(unsafe.Pointer(&sysmask)))
+ if ret == 0 {
+ t.Fatal(err)
+ }
+ if newmask != mask {
+ t.Fatalf("SetProcessAffinityMask didn't set newmask of 0x%x. Current mask is 0x%x.", newmask, mask)
+ }
+}
+
+// See Issue 14959
+func TestDLLPreloadMitigation(t *testing.T) {
+ if _, err := exec.LookPath("gcc"); err != nil {
+ t.Skip("skipping test: gcc is missing")
+ }
+
+ tmpdir, err := os.MkdirTemp("", "TestDLLPreloadMitigation")
+ if err != nil {
+ t.Fatal("TempDir failed: ", err)
+ }
+ defer func() {
+ err := os.RemoveAll(tmpdir)
+ if err != nil {
+ t.Error(err)
+ }
+ }()
+
+ dir0, err := os.Getwd()
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer os.Chdir(dir0)
+
+ const src = `
+#include <stdint.h>
+#include <windows.h>
+
+uintptr_t cfunc(void) {
+ SetLastError(123);
+ return 0;
+}
+`
+ srcname := "nojack.c"
+ err = os.WriteFile(filepath.Join(tmpdir, srcname), []byte(src), 0)
+ if err != nil {
+ t.Fatal(err)
+ }
+ name := "nojack.dll"
+ cmd := exec.Command("gcc", "-shared", "-s", "-Werror", "-o", name, srcname)
+ cmd.Dir = tmpdir
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ t.Fatalf("failed to build dll: %v - %v", err, string(out))
+ }
+ dllpath := filepath.Join(tmpdir, name)
+
+ dll := syscall.MustLoadDLL(dllpath)
+ dll.MustFindProc("cfunc")
+ dll.Release()
+
+ // Get into the directory with the DLL we'll load by base name
+ // ("nojack.dll") Think of this as the user double-clicking an
+ // installer from their Downloads directory where a browser
+ // silently downloaded some malicious DLLs.
+ os.Chdir(tmpdir)
+
+ // First before we can load a DLL from the current directory,
+ // loading it only as "nojack.dll", without an absolute path.
+ delete(sysdll.IsSystemDLL, name) // in case test was run repeatedly
+ dll, err = syscall.LoadDLL(name)
+ if err != nil {
+ t.Fatalf("failed to load %s by base name before sysdll registration: %v", name, err)
+ }
+ dll.Release()
+
+ // And now verify that if we register it as a system32-only
+ // DLL, the implicit loading from the current directory no
+ // longer works.
+ sysdll.IsSystemDLL[name] = true
+ dll, err = syscall.LoadDLL(name)
+ if err == nil {
+ dll.Release()
+ if wantLoadLibraryEx() {
+ t.Fatalf("Bad: insecure load of DLL by base name %q before sysdll registration: %v", name, err)
+ }
+ t.Skip("insecure load of DLL, but expected")
+ }
+}
+
+// Test that C code called via a DLL can use large Windows thread
+// stacks and call back in to Go without crashing. See issue #20975.
+//
+// See also TestBigStackCallbackCgo.
+func TestBigStackCallbackSyscall(t *testing.T) {
+ if _, err := exec.LookPath("gcc"); err != nil {
+ t.Skip("skipping test: gcc is missing")
+ }
+
+ srcname, err := filepath.Abs("testdata/testprogcgo/bigstack_windows.c")
+ if err != nil {
+ t.Fatal("Abs failed: ", err)
+ }
+
+ tmpdir, err := os.MkdirTemp("", "TestBigStackCallback")
+ if err != nil {
+ t.Fatal("TempDir failed: ", err)
+ }
+ defer os.RemoveAll(tmpdir)
+
+ outname := "mydll.dll"
+ cmd := exec.Command("gcc", "-shared", "-s", "-Werror", "-o", outname, srcname)
+ cmd.Dir = tmpdir
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ t.Fatalf("failed to build dll: %v - %v", err, string(out))
+ }
+ dllpath := filepath.Join(tmpdir, outname)
+
+ dll := syscall.MustLoadDLL(dllpath)
+ defer dll.Release()
+
+ var ok bool
+ proc := dll.MustFindProc("bigStack")
+ cb := syscall.NewCallback(func() uintptr {
+ // Do something interesting to force stack checks.
+ forceStackCopy()
+ ok = true
+ return 0
+ })
+ proc.Call(cb)
+ if !ok {
+ t.Fatalf("callback not called")
+ }
+}
+
+// wantLoadLibraryEx reports whether we expect LoadLibraryEx to work for tests.
+func wantLoadLibraryEx() bool {
+ return testenv.Builder() == "windows-amd64-gce" || testenv.Builder() == "windows-386-gce"
+}
+
+func TestLoadLibraryEx(t *testing.T) {
+ use, have, flags := runtime.LoadLibraryExStatus()
+ if use {
+ return // success.
+ }
+ if wantLoadLibraryEx() {
+ t.Fatalf("Expected LoadLibraryEx+flags to be available. (LoadLibraryEx=%v; flags=%v)",
+ have, flags)
+ }
+ t.Skipf("LoadLibraryEx not usable, but not expected. (LoadLibraryEx=%v; flags=%v)",
+ have, flags)
+}
+
+var (
+ modwinmm = syscall.NewLazyDLL("winmm.dll")
+ modkernel32 = syscall.NewLazyDLL("kernel32.dll")
+
+ procCreateEvent = modkernel32.NewProc("CreateEventW")
+ procSetEvent = modkernel32.NewProc("SetEvent")
+)
+
+func createEvent() (syscall.Handle, error) {
+ r0, _, e0 := syscall.Syscall6(procCreateEvent.Addr(), 4, 0, 0, 0, 0, 0, 0)
+ if r0 == 0 {
+ return 0, syscall.Errno(e0)
+ }
+ return syscall.Handle(r0), nil
+}
+
+func setEvent(h syscall.Handle) error {
+ r0, _, e0 := syscall.Syscall(procSetEvent.Addr(), 1, uintptr(h), 0, 0)
+ if r0 == 0 {
+ return syscall.Errno(e0)
+ }
+ return nil
+}
+
+func BenchmarkChanToSyscallPing(b *testing.B) {
+ n := b.N
+ ch := make(chan int)
+ event, err := createEvent()
+ if err != nil {
+ b.Fatal(err)
+ }
+ go func() {
+ for i := 0; i < n; i++ {
+ syscall.WaitForSingleObject(event, syscall.INFINITE)
+ ch <- 1
+ }
+ }()
+ for i := 0; i < n; i++ {
+ err := setEvent(event)
+ if err != nil {
+ b.Fatal(err)
+ }
+ <-ch
+ }
+}
+
+func BenchmarkSyscallToSyscallPing(b *testing.B) {
+ n := b.N
+ event1, err := createEvent()
+ if err != nil {
+ b.Fatal(err)
+ }
+ event2, err := createEvent()
+ if err != nil {
+ b.Fatal(err)
+ }
+ go func() {
+ for i := 0; i < n; i++ {
+ syscall.WaitForSingleObject(event1, syscall.INFINITE)
+ if err := setEvent(event2); err != nil {
+ b.Errorf("Set event failed: %v", err)
+ return
+ }
+ }
+ }()
+ for i := 0; i < n; i++ {
+ if err := setEvent(event1); err != nil {
+ b.Fatal(err)
+ }
+ if b.Failed() {
+ break
+ }
+ syscall.WaitForSingleObject(event2, syscall.INFINITE)
+ }
+}
+
+func BenchmarkChanToChanPing(b *testing.B) {
+ n := b.N
+ ch1 := make(chan int)
+ ch2 := make(chan int)
+ go func() {
+ for i := 0; i < n; i++ {
+ <-ch1
+ ch2 <- 1
+ }
+ }()
+ for i := 0; i < n; i++ {
+ ch1 <- 1
+ <-ch2
+ }
+}
+
+func BenchmarkOsYield(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ runtime.OsYield()
+ }
+}
+
+func BenchmarkRunningGoProgram(b *testing.B) {
+ tmpdir, err := os.MkdirTemp("", "BenchmarkRunningGoProgram")
+ if err != nil {
+ b.Fatal(err)
+ }
+ defer os.RemoveAll(tmpdir)
+
+ src := filepath.Join(tmpdir, "main.go")
+ err = os.WriteFile(src, []byte(benchmarkRunningGoProgram), 0666)
+ if err != nil {
+ b.Fatal(err)
+ }
+
+ exe := filepath.Join(tmpdir, "main.exe")
+ cmd := exec.Command(testenv.GoToolPath(b), "build", "-o", exe, src)
+ cmd.Dir = tmpdir
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ b.Fatalf("building main.exe failed: %v\n%s", err, out)
+ }
+
+ b.ResetTimer()
+ for i := 0; i < b.N; i++ {
+ cmd := exec.Command(exe)
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ b.Fatalf("running main.exe failed: %v\n%s", err, out)
+ }
+ }
+}
+
+const benchmarkRunningGoProgram = `
+package main
+
+import _ "os" // average Go program will use "os" package, do the same here
+
+func main() {
+}
+`
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 17:44:29 +0000