“__kernel_vsyscall()在0xb779e424”没有可用的来源?

时间:2014-02-25 08:16:13

标签: linux sockets udp kernel system-calls

#include <features.h>
#include <time.h>
#include <sys/time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>

#include <netinet/in.h>
#include <arpa/inet.h>






#define million 1000000L

timer_t firstTimerID, secondTimerID, thirdTimerID;
double Task2ms_Raster, Task10ms_Raster, Task100ms_Raster;

struct sockaddr_in addr, client;
int acceptSocket;
char buf[1024];
char a[128];
long rc, sentbytes;
int port = 18033;






void TASK1(Task2ms_Raster)
{

     struct timespec start, stop;
     uint32 startTime, stopTime;

        if( (startTime = clock_gettime( CLOCK_REALTIME, &start)) == -1 ) {
          perror("clock gettime");

        }

        startTime =start.tv_sec + 0.00000001 * start.tv_nsec;
             //  printf("start time is %lf", StartTime);


       // return EXIT_SUCCESS;

    /* Trigger DAQ for the 2ms XCP raster. */
    if( XCPEVENT_DAQ_OVERLOAD & Xcp_DoDaqForEvent_2msRstr( ))
    {
        ++numDaqOverload2ms;
    }

    /* Update those variables which are modified every 2ms. */
 counter32 += slope32;

    /* Trigger STIM for the 2ms XCP raster. */
  if( enableBypass2ms )
   {
        if( XCPEVENT_MISSING_DTO & Xcp_DoStimForEvent_2msRstr( ) )
        {
     ++numMissingDto2ms;
        }
        }
  if( (stopTime = clock_gettime( CLOCK_REALTIME, &stop)) == -1 ) {
          perror( "clock gettime" );

        }
  stopTime =  stop.tv_sec + 0.00000001 * stop.tv_nsec;
    //printf("stop time is %ld", stopTime);

            duration2ms = (stopTime- startTime);
           // printf( "time difference is= %ld\n", duration2ms );



}

void TASK2(Task10ms_Raster)
{
     struct timespec start, stop;

     uint32 startTime, stopTime;
            if( (startTime = clock_gettime( CLOCK_REALTIME, &start)) == -1 ) {
              perror( "clock gettime" );

            }

            startTime =start.tv_sec + 0.00000001 * start.tv_nsec;
             //  printf("start time is %lf", StartTime);


    /* Trigger DAQ for the 10ms XCP raster. */
    if( XCPEVENT_DAQ_OVERLOAD & Xcp_DoDaqForEvent_10msRstr( ))
    {
        ++numDaqOverload10ms;
    }

    /* Update those variables which are modified every 10ms. */
    counter16 += slope16;

    /* Trigger STIM for the 10ms XCP raster. */
    if( enableBypass10ms )
    {
        if( XCPEVENT_MISSING_DTO & Xcp_DoStimForEvent_10msRstr( ) )
        {
            ++numMissingDto10ms;
        }
    }

    if( (stopTime = clock_gettime( CLOCK_REALTIME, &stop)) == -1 ) {
              perror( "clock gettime" );

            }
    Xcp_CmdProcessor();

    stopTime =  stop.tv_sec + 0.00000001 * stop.tv_nsec;
      //printf("stop time is %lf", stopTime);


    duration10ms = ( stop.tv_sec - start.tv_sec )
                             + (double)( stop.tv_nsec - start.tv_nsec )
                               / (double)million;
           // printf( "time difference is= %ld\n", duration10ms );
}


void TASK3(Task100ms_Raster)
{
     struct timespec start, stop;
     uint32 startTime, stopTime;



            if( (startTime = clock_gettime( CLOCK_REALTIME, &start)) == -1 )
            {
              perror("clock gettime");

            }
           startTime =start.tv_sec + 0.00000001 * start.tv_nsec;
          // printf("start time is %lf", startTime);

    /* Trigger DAQ for the 100ms XCP raster. */
    if( XCPEVENT_DAQ_OVERLOAD & Xcp_DoDaqForEvent_100msRstr( ))
    {
        ++numDaqOverload100ms;
    }

    /* Update those variables which are modified every 100ms. */
    counter8 += slope8;


    /* Trigger STIM for the 100ms XCP raster. */
    if( enableBypass100ms )
    {
        if( XCPEVENT_MISSING_DTO & Xcp_DoStimForEvent_100msRstr( ) )
        {
            ++numMissingDto100ms;
        }
    }

    if((stopTime = clock_gettime( CLOCK_REALTIME, &stop)) == -1 ) {
              perror( "clock gettime" );

            }

    stopTime =  stop.tv_sec + 0.00000001 * stop.tv_nsec;
     // printf("stop time is %lf", stopTime);


    duration100ms = ( stop.tv_sec - start.tv_sec )
                     + (double)( stop.tv_nsec - start.tv_nsec )
                       / (double)million;
          //  printf( "time difference is= %ld\n", duration100ms );
}



static void timerHandler( int sig, siginfo_t *si, void *uc )
{
    timer_t *tidp;

    tidp = si->si_value.sival_ptr;

    if ( *tidp == firstTimerID )

        TASK1(Task2ms_Raster);
   else if ( *tidp == secondTimerID )
       TASK2(Task10ms_Raster);
    else if ( *tidp == thirdTimerID )
        TASK3(Task100ms_Raster);
}


 static int makeTimer( char *name, timer_t *timerID, int expireMS, int intervalMS )
{
    struct sigevent         te;
    struct itimerspec       its;
    struct sigaction        sa;
    int                     sigNo = SIGRTMIN;

    /* Set up signal handler. */
    sa.sa_flags = SA_SIGINFO;
    sa.sa_sigaction = timerHandler;
    sigemptyset(&sa.sa_mask);
    if (sigaction(sigNo, &sa, NULL) == -1)
    {
        perror("sigaction");
    }

    /* Set and enable alarm */
    te.sigev_notify = SIGEV_SIGNAL;
    te.sigev_signo = sigNo;
    te.sigev_value.sival_ptr = timerID;
    timer_create(CLOCK_REALTIME, &te, timerID);

    its.it_interval.tv_sec = 0;
    its.it_interval.tv_nsec = intervalMS * 1000000;
    its.it_value.tv_sec = 0;
    its.it_value.tv_nsec = expireMS * 1000000;
    timer_settime(*timerID, 0, &its, NULL);

    return 1;
}



int CreateSocket()
{

    socklen_t len = sizeof(client);
       // Socket creation for UDP

       acceptSocket=socket(AF_INET,SOCK_DGRAM,0);

       if(acceptSocket==-1)

       {

         printf("Failure: socket creation is failed, failure code\n");

         return 1;

       }

       else

       {

         printf("Socket started!\n");

       }

     memset(&addr, 0, sizeof(addr));

     addr.sin_family=AF_INET;

     addr.sin_port=htons(port);

     addr.sin_addr.s_addr=htonl(INADDR_ANY);

     rc=bind(acceptSocket,(struct sockaddr*)&addr,sizeof(addr));

     if(rc== -1)

     {

       printf("Failure: listen, failure code:\n");

       return 1;

     }

     else

     {

       printf("Socket an port %d \n",port);

     }


     if(acceptSocket == -1)
     {
         printf("Fehler: accept, fehler code:\n");

          return 1;
     }
     else
     {

     while(rc!=-1)
         {


         rc=recvfrom(acceptSocket,buf, sizeof(buf), 0, (struct sockaddr*) &client, &len);
         if(rc==0)
         {
           printf("Server has no connection..\n");
           break;
         }
         if(rc==-1)
         {
             printf("something went wrong with data %s", strerror(errno));
           break;
         }


         XcpIp_RxCallback( (uint16) rc, (uint8*) buf, (uint16) port );


                makeTimer("First Timer", &firstTimerID, 2, 2);   //2ms
             makeTimer("Second Timer", &secondTimerID, 10, 10);    //10ms
                makeTimer("Third Timer", &thirdTimerID, 100, 100);  //100ms
          }


     }

       close(acceptSocket);



       return 0;

     }



int main()
{

     Xcp_Initialize();
     CreateSocket();
     return 0;
}




void XcpApp_IpTransmit( uint16 XcpPort,  Xcp_StatePtr8 pBytes, uint16 numBytes )
{


        if ((long)XcpPort==port){
                sentbytes = sendto(acceptSocket,(char*)pBytes,(long)numBytes,0, (struct sockaddr*)&client, sizeof(client));
        }
        XcpIp_TxCallback(port,(uint16)sentbytes);
    }

我正在研究客户端和服务器架构。我的代码工作正常,Server正在等待来自客户端的请求,当客户端向服务器发送请求时,我在调试模式下收到以下消息。 “__kernel_vsyscall()在0xb779e424”没有可用的来源“

我正在使用linux操作系统。

1 个答案:

答案 0 :(得分:1)

可能是代码中某处存在内存损坏(可能是缓冲区溢出)。

当您使用3级优化进行编译时,编译器输出的代码是这样的,即缓冲区溢出会覆盖重要的内容(可能会破坏堆栈?),并且在没有优化的情况下运行时,编译器会生成非优化代码标志是不同的,因此溢出会运行其他内容并且不会导致此特定症状。该错误可能仍然存在,它可能以其他方式表现出来,甚至根本不存在 - 直到你改变一些不相关的东西,然后它会再次咬你。

__kernel_vsyscall()只是一个glibc函数,只要你进行系统调用就会在内部调用它。那里没什么重要的。

请在valgrind下运行你的程序。它很可能会为你找到内存溢出。