在代碼中引發運行時異常

Question

我正在實現一種算法，其中我已經使用了CPP和Intel TBB庫的MultiCore線程庫。我在線程的幫助下調用了函數，有時它會完美執行，有時它會運行時間異常。我試圖找到原因，但無法找到。請查找提供異常的代碼片段示例。

#include <iostream> 
#include <sstream> 
#include <fstream> 
#include <vector> 
#include <algorithm> 
#include <tbb/pipeline.h> 
#include <tbb/atomic.h> 
#include <tbb/concurrent_queue.h> 
#include <tbb/compat/thread> 
#include <tbb/tbbmalloc_proxy.h>  
using namespace std; 
using namespace tbb; 

#define pi 3.141593 
#define FILTER_LEN 265 


class MyBuffer 
{ 
    public: 
    double *acc; 
    double *buffer; 
    int start,end; 


    MyBuffer() 
    { 
     start=0; 
     end=0; 

     buffer=new double[150264]; 
     acc=new double[150000]; 
     fill_n(buffer,150264,0); 

    } 

    ~MyBuffer() 
    { 
     delete[] buffer; 
     delete[] acc; 
    } 
    int startnumber() 
    { 
     return start; 
    } 
    int endnumber() 
    { 
     return end; 
    } 
}; 




typedef concurrent_queue<MyBuffer> QueueMyBufferType; 
QueueMyBufferType chunk_queue; 

atomic<bool> stop_flag; 

// input function that will be running by thread to generate sinewave 

void input_function()        
{ 
    stop_flag = false;  

    cout<<"thread reached to call input function " <<endl; 

    ofstream o("testing sinewave.csv"); 

    int counter=0; 
    while(counter<150000)  
    { 
     cout<<"value of counter is \t" <<counter << endl; 
     //MyBuffer *b=new MyBuffer;              
     MyBuffer b; 
     b.start=(FILTER_LEN-1+(counter)); 
     b.end=(25264+(counter)); 

     cout<<"value of b.start is and b.end is "<<b.start<<"\t" <<b.end<<endl; 

     for(int i =b.startnumber(); i <b.endnumber(); i++) 
     { 
       b.buffer[i] = sin(700 * (2 * pi) * (i/5000.0)); 
       o<<b.buffer[i]<<endl; 
     } 

     chunk_queue.push(b); 
     cout<<"object pushed in queue and value of j is \t" <<counter <<endl; 
     counter+=25000; 
    } 

    stop_flag = true; 
    cout<<"all data is perfectly generated" <<endl; 
} 


int main() 
{ 
    thread input_thread(input_function); 

    while(!stop_flag) 
    { 
     //cout<<"waiting for thread " << endl; 
    } 
    cout << "\n All Data is processed \n\n" << endl;   

    return 0; 
} 

這段代碼是應用程序的一部分，併產生正弦波。請幫忙尋找在那裏我得到錯誤的幫助。

Answer 1

在：

b.end=(25264+(MyBuffer::j)); 

25264+(MyBuffer::j)可以出門成員數組的邊界buffer

綁定檢查MyBuffer::j<150000可能MyBuffer::j<150000-25264

while(counter<150000-25264)  
    { ... }