Commit 5d5312c5 authored by Alex Brainman's avatar Alex Brainman

runtime: fix parameter checking in syscall.NewCallback

I have made mistake while converting it to Go (CL 132820043).
Added test as penance for my sin.

LGTM=rsc
R=golang-codereviews, bradfitz, rsc
CC=golang-codereviews
https://golang.org/cl/136560043
parent 3b4bccc8
......@@ -53,7 +53,7 @@ func compileCallback(fn eface, cleanstack bool) (code uintptr) {
}
argsize := uintptr(0)
for _, t := range (*[1024](*_type))(unsafe.Pointer(&ft.in[0]))[:len(ft.in)] {
if (*t).size != uintptrSize {
if (*t).size > uintptrSize {
panic("compilecallback: input parameter size is wrong")
}
argsize += uintptrSize
......
......@@ -449,3 +449,42 @@ func TestStdcallAndCDeclCallbacks(t *testing.T) {
}
}
}
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)
}
}
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