windows service SIGSEGV

Question

My Windows 服务在 ServiceMain 函数结束时给出 SIGSEGV。

代码如下：

开始：

int main(int argc, char* argv[])
{
    SrvName[16]=0;
    SERVICE_TABLE_ENTRY servicetable[]=
    {
        {strServiceName,(LPSERVICE_MAIN_FUNCTION)ServiceMain},
        {NULL,NULL}
    };
    BOOL success;
    success=StartServiceCtrlDispatcher(servicetable);
assert(success!=0);
    return(0);
}

服务开始：

void ServiceMain(DWORD argc, LPTSTR *argv)
{
    BOOL success;
    nServiceStatusHandle=RegisterServiceCtrlHandlerEx(strServiceName,
        (LPHANDLER_FUNCTION_EX)ServiceCtrlHandler, NULL);
assert(nServiceStatusHandle!=0);
success=UpdateServiceStatus(SERVICE_START_PENDING,NO_ERROR,0,1,20000);
assert(success!=0);
killServiceEvent=CreateEvent(0,TRUE,FALSE,0);
assert(killServiceEvent!=NULL);
success=UpdateServiceStatus(SERVICE_START_PENDING,NO_ERROR,0,2,10000);
assert(success!=0);
nServiceCurrentStatus=SERVICE_RUNNING;
success=UpdateServiceStatus(SERVICE_RUNNING,NO_ERROR,0,0,0);
assert(success!=0);
WaitForSingleObject(killServiceEvent,INFINITE);
CloseHandle(killServiceEvent);
UpdateServiceStatus(SERVICE_STOPPED,NO_ERROR,0,0,0);
return;
}///2x SIGSEGV here

状态更新功能：

BOOL UpdateServiceStatus(DWORD dwCurrentState, DWORD dwWin32ExitCode,
        DWORD dwServiceSpecificExitCode, DWORD dwCheckPoint,
                 DWORD dwWaitHint)
 {
BOOL success;
SERVICE_STATUS nServiceStatus;
nServiceStatus.dwServiceType=SERVICE_WIN32_OWN_PROCESS;
nServiceStatus.dwCurrentState=dwCurrentState;
if(dwCurrentState==SERVICE_START_PENDING)
{
    nServiceStatus.dwControlsAccepted=0;
}
else
{
    nServiceStatus.dwControlsAccepted=SERVICE_ACCEPT_STOP
        |SERVICE_ACCEPT_SHUTDOWN;
}
if(dwServiceSpecificExitCode==0)
{
    nServiceStatus.dwWin32ExitCode=dwWin32ExitCode;
}
else
{
    nServiceStatus.dwWin32ExitCode=ERROR_SERVICE_SPECIFIC_ERROR;
}
nServiceStatus.dwServiceSpecificExitCode=dwServiceSpecificExitCode;
nServiceStatus.dwCheckPoint=dwCheckPoint;
nServiceStatus.dwWaitHint=dwWaitHint;
success=SetServiceStatus(nServiceStatusHandle,&nServiceStatus);
    return success;
}

单片机消息处理程序：

void ServiceCtrlHandler(DWORD nControlCode,DWORD dwEventType,
LPVOID lpEventData,LPVOID lpContext)
{
switch(nControlCode)
{
case SERVICE_CONTROL_SHUTDOWN:
case SERVICE_CONTROL_STOP:
    nServiceCurrentStatus=SERVICE_STOP_PENDING;
    UpdateServiceStatus(SERVICE_STOP_PENDING,NO_ERROR,0,1,10000);
    SetEvent(killServiceEvent);
    return;
default:
    break;
}
UpdateServiceStatus(nServiceCurrentStatus,NO_ERROR,0,0,0);
return;
}

所以，我在ServiceMain（）的末尾有2个sigsegv："服务.exe导致从位置 00000000 读取的位置 00000000 发生访问冲突。"寄存 器：

eax=00000000 ebx=00617d60 ecx=75bd76ba edx=00600174 esi=00000001 edi=00000000
eip=00000000 esp=010eff8c ebp=00617d70 iopl=0         nv up ei pl zr na po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010246
AddrPC   Params
00000000 00617D60 010EFFD4 77A437EB
7765ED5C 00617D60 70866618 00000000 kernel32.dll!BaseThreadInitThunk
77A437EB 77B47587 00617D60 00000000 ntdll.dll!RtlInitializeExceptionChain
77A437BE 77B47587 00617D60 00000000 ntdll.dll!RtlInitializeExceptionChain

我正在使用 Code：：Blocks with MinGW， Win7 32bit pro。

你对此有什么想法吗？

Answer 1

所有服务处理程序都缺少WINAPI （ __stdcall ） 调用约定，并且您的HandlerEx也缺少返回值。 这些错误导致调用堆栈管理不善。

修复您的声明，并摆脱类型转换。 编译器会发出有关错误声明的错误，但您强制它忽略它们并接受您的错误代码。

SERVICE_TABLE_ENTRY servicetable[]=
{
    {strServiceName, &ServiceMain},
    {NULL,NULL}
};

void WINAPI ServiceMain(DWORD argc, LPTSTR *argv)
{
    ...
    nServiceStatusHandle = RegisterServiceCtrlHandlerEx(..., &ServiceCtrlHandler, ...);
    ...
}

DWORD WINAPI ServiceCtrlHandler(DWORD dwControl, DWORD dwEventType, LPVOID lpEventData, LPVOID lpContext)
{
    switch(dwControl)
    {
        case SERVICE_CONTROL_SHUTDOWN:
        case SERVICE_CONTROL_STOP:
            ...
            return NO_ERROR;
        case SERVICE_CONTROL_INTERROGATE:
            ...
            return NO_ERROR;
        default:
            return ERROR_CALL_NOT_IMPLEMENTED;
    }
}