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// 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 (
"runtime"
"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(hwnd syscall.Handle, 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, "user32.dll")
defer d.Release()
d.Proc("EnumWindows").Call(c, 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 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 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 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) {
// TODO: test a function which calls back in another thread: QueueUserAPC() or CreateThread()
}
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