在什么情况下调用dll时出现“信号在 cgo 执行期间到达”之类的恐慌？
要调用的代码是 - 基于go 分发zsyscall_windows.go中的示例：src
var (
// entry names found using dumpbin /exports
dllSweph = syscall.NewLazyDLL("swedll32.dll")
_swe_jdut1_to_utc = dllSweph.NewProc("_swe_jdut1_to_utc@36")
_swe_julday = dllSweph.NewProc("_swe_julday@24")
)
func swe_julday(year, month, day int32, hour float64, gregflag int32) float64 {
r, _, errn := syscall.Syscall6(
_swe_julday.Addr(),
5,
uintptr(year),
uintptr(month),
uintptr(day),
uintptr(hour),
uintptr(gregflag),
0)
if r == 0 {
if errn != 0 {
panic(error(errn))
}
}
return float64(r)
}
func swe_jdut1_to_utc(tjd_ut float64, gregflag int32, iyear, imonth, iday, ihour, imin *int32, dsec *float64) {
defer func() {
if e := recover(); e != nil {
}
}()
syscall.Syscall9(
_swe_jdut1_to_utc.Addr(),
8,
uintptr(tjd_ut),
uintptr(gregflag),
uintptr(unsafe.Pointer(iyear)),
uintptr(unsafe.Pointer(imonth)),
uintptr(unsafe.Pointer(iday)),
uintptr(unsafe.Pointer(ihour)),
uintptr(unsafe.Pointer(imin)),
uintptr(unsafe.Pointer(dsec)),
0)
}
现在，当我打电话时，swe_julday一切似乎都很好；虽然不是，但它给出了错误的答案。当swe_jdut1_to_utc被调用时，我得到：
Exception 0xc0000005 0x1 0x42e5e5 0x3235ce40
PC=0x3235ce40
signal arrived during cgo execution
.../sweph.swe_jdut1_to_utc(0x40000000, 0x4150b979, 0x1, 0x1207bf24, 0x1207bf28, 0x1207bf34, 0x1207bf30, 0x1207bf2c, 0x1207bf38)
...(trace info)
eax 0x0
ebx 0x1207be94
ecx 0x1207bf38
edx 0x42e5e5
edi 0xcfeac
esi 0x0
ebp 0xcfe5c
esp 0xcfdd8
eip 0x3235ce40
eflags 0x10246
cs 0x23
fs 0x53
gs 0x2b
exit status 2
exit status 1
环境：
Windows 8 x64
go 1.4 x86
gcc x86
而且我不知道是否gcc真的需要调用 dll，但我已经以任何方式安装了它，因为错误是关于cgo. 所有命令都在路径中。使用管理权限编译时出现同样的错误。
被调用的C函数是：
void swe_jdut1_to_utc (double tjd_ut, int32 gregflag, int32 *iyear, int32 *imonth, int32 *iday, int32 *ihour, int32 *imin, double *dsec)
在该 dll 中导入和C#调用此函数的函数（& 有效）是：
[DllImport("swedll32.dll", EntryPoint = "swe_jdut1_to_utc")]
public static extern void swe_jdut1_to_utc(
double tjd_ut,
int gregflag,
ref Int32 iyear, ref Int32 imonth, ref Int32 iday,
ref Int32 ihour, ref Int32 imin, ref double dsec);