Question

我收到了这个奇怪的错误。只发生在Linux上，我需要让它在该操作系统上工作，但在Windows上工作得非常好。

仅在inFile.close();上发生。已使用大量cout语句对此进行了测试。

这是它遇到seg故障的函数。（Element300是一个c样式字符串，有81个字符，包括终结符。读入的文件也是JAVA关键字，所以没有超过80个字符。）

这是功能：

void HT300::fill300()
{
    Element300 readLine = "\0";
    Element300 tempLine = "\0";
    int hashedValue;
    int tempIndex = 0;
    int tempProbed = 0;
    int tempLineIndex = 0;
    int readLineIndex = 0;
    ifstream inFile;

    inFile.open("RWJAVA.DAT");

    if(!inFile)
    {
        cerr << "File not found: RWJAVA.DAT" << endl;
    }
    else
    {
        while(!inFile.getline(readLine,MAX_SIZE,'\n').eof())
        {
            while(readLine[readLineIndex] == ' ')
            {
                readLineIndex++;
            }
            while(isalnum(readLine[readLineIndex]))
            {
                tempLine[tempLineIndex] = readLine[readLineIndex];
                tempLineIndex++;
                readLineIndex++;
            }
            tempLine[tempLineIndex] = '\0';


            hashedValue = hash300(tempLine);
            tempIndex = hashedValue;

            while(strcmp(theTable[tempIndex].reserved,tempLine) != 0 && strcmp(theTable[tempIndex].reserved, "\0") != 0)
            {
                tempProbed++;
                tempIndex += 3;

                if(tempIndex > MAX_TABLE)
                {
                    tempIndex = 0;
                }

            }
            if(strcmp(theTable[tempIndex].reserved,"\0") == 0)
            {
                strcpy(theTable[tempIndex].reserved,tempLine);
                theTable[tempIndex].probed = tempProbed;
                theTable[tempIndex].hashed = hashedValue;
            }

            tempIndex = 0;
            tempProbed = 0;
            tempLineIndex = 0;
            readLineIndex = 0;
            strcpy(tempLine, "\0");


        }

    }
    inFile.close();
    return;
}

WINDOWS上的

inFile错误：

    Multiple errors reported.

1) Failed to execute MI command:
-var-create - * inFile
Error message from debugger back end:
-var-create: unable to create variable object

2) Failed to execute MI command:
-var-create - * inFile
Error message from debugger back end:
-var-create: unable to create variable object

3) Failed to execute MI command:
-data-evaluate-expression inFile
Error message from debugger back end:
No symbol "inFile" in current context.

4) Failed to execute MI command:
-var-create - * inFile
Error message from debugger back end:
-var-create: unable to create variable object

5) Unable to create variable object

Answer 1

循环：

while(strcmp(theTable[tempIndex].reserved,tempLine) != 0 && strcmp(theTable[tempIndex].reserved, "\0") != 0)
            {
                tempProbed++;
                tempIndex += 3;

                if(tempIndex > MAX_TABLE)
                {
                    tempIndex = 0;
                }

            }

不知何故超出界限。我通过更改选中的条件并将if语句设置为>=而不是>来解决此问题。

在关闭文件时获取Segfault

1 个答案: