c++如何修复这段代码中的segmentation fault 11

Question

I have a signal 11; ie segfault . I know where it occurs (see code), but do not know how to correct it.

int *totalThreadNumProduced; //array
int *totalThreadNumConsumed; //array
int *tempStats; //array
for(int i=0; i < global_args.numProducers; i++)
{  
    tempStats = (int*) pthread_join( tidP[i], NULL );
    simulationStats.totalThreadNumProduced[i] = tempStats[0]; //where the segmentation fault 11 is
    simulationStats.numTimesBufferFull += tempStats[1];

}

Answer 1

tempStats = (int*) pthread_join( tidP[i], NULL );

tempStats is an array of integers, judging from the following line:

simulationStats.totalThreadNumProduced[i] = tempStats[0];

the segfault is either due to memory not being allocated for totalThreadNumProduced , or tempStats .

Furthermore, your usage for pthread_join is likely incorrect; it simply returns whether the call was successful or not. If you wanting the return value of a completed thread function, consider using the 2nd status parameter of pthread_join as show here .