使用CFHostCreateWithName时崩溃：＆＃34;尝试再次启动线程＆＃34;

Question

帮助！ 当我尝试获取给主机名的地址时，我遇到了崩溃; 崩溃日志显示如下：

1 libobjc.A.dylib 0x0000000197d180e4 objc_exception_throw + 56

2 CoreFoundation 0x0000000186044218 - [NSException initWithCoder：]

3 Foundation 0x0000000186e9528c - [NSThread start] + 136

4 ZFirewall7.dylib 0x0000000105e4d768 - [FiPSettingsManager doHostStuff：] + 1124

5 ZFirewall7.dylib 0x0000000105e48424 _ZL23my_CFHostCreateWithNamePPK13__CFAllocatorPPK10__CFString + 164

6上传0x000000010220d1c0 + [UploadUtil addressesForHostname：]（UploadUtil.m：277）

7上传0x000000010220d120 + [UploadUtil addressForHostname：]（UploadUtil.m：267）

...

*** - [NSThread start]：尝试再次启动线程

我的代码是：

+(NSArray *)addressesForHostname:(NSString *)hostname
{

    // Get the addresses for the given hostname.
    CFHostRef hostRef = CFHostCreateWithName(kCFAllocatorDefault, (__bridge CFStringRef)hostname);

    BOOL isSuccess = CFHostStartInfoResolution(hostRef, kCFHostAddresses, nil);
    if (!isSuccess)
    {
        CFRelease(hostRef);
        return nil;
    }
    CFArrayRef addressesRef = CFHostGetAddressing(hostRef, nil);
    if (addressesRef == nil)
    {
        CFRelease(hostRef);
        return nil;
    }
    // Convert these addresses into strings.
    char ipAddress[INET6_ADDRSTRLEN];
    NSMutableArray *addresses = [NSMutableArray array];
    CFIndex numAddresses = CFArrayGetCount(addressesRef);

    for (CFIndex currentIndex = 0; currentIndex < numAddresses; currentIndex++) {
        struct sockaddr *address = (struct sockaddr *)CFDataGetBytePtr(CFArrayGetValueAtIndex(addressesRef, currentIndex));
        if (address == nil)
        {
            CFRelease(hostRef);
            return nil;
        }
        getnameinfo(address, address->sa_len, ipAddress, INET6_ADDRSTRLEN, nil, 0, NI_NUMERICHOST);
        [addresses addObject:[NSString stringWithCString:ipAddress encoding:NSASCIIStringEncoding]];
    }
    CFRelease(hostRef);
    return addresses;
    }

这个函数确实由几个线程调用，CFHostCreateWithName的文档说它是线程安全的，现在我不知道如何解决这个问题。

帮助！