LIST_ENTRY 已损坏（即双重删除）。不知道为啥

Posted 2023-02-22

【中文标题】LIST_ENTRY 已损坏（即双重删除）。不知道为啥

【英文标题】：A LIST_ENTRY has been corrupted (i.e. double remove). No clue whyLIST_ENTRY 已损坏（即双重删除）。不知道为什么

【发布时间】：2018-03-29 21:09:25

【问题描述】：

我正在使用来自 youtuber JavidX9 的一些技巧在控制台中制作一个简单的游戏。当窗口和缓冲区大小正确时，一切都会正确显示，仅供尝试运行它的任何人参考。当我在调试应用程序时尝试关闭应用程序时，我的问题就出现了。有时，如果我通过在屏幕上随机移动角色来弄乱它，它就会坏掉。我得到的错误是标题中列出的错误。但在那之后，我收到一个链接器错误，告诉我该进程仍在运行（我找不到）。所以调试是一场噩梦。我这几天一直在寻找这个问题的答案，希望你们中的一位 C++ 大神可以帮助我。代码很短。

编辑：刚刚发现了一些新信息。如果我启动程序，并且什么都不做，它会在大约一分钟左右后崩溃。潜在的线程问题？

#include <iostream>
#include <Windows.h>
#include <chrono>

using namespace std;

int screenWidth = 120; //Console Screen Size. X = Cols & Y = Rows
int screenHeight = 40;

int mapWidth = 48;  //World Dimensions
int mapHeight = 48;

int playerX = mapWidth / 2;
int playerY = mapHeight / 2;

int main()

    wchar_t *screen = new wchar_t[screenWidth * screenHeight];
    HANDLE consoleHandle = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE, 0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
    SetConsoleActiveScreenBuffer(consoleHandle);
    DWORD bytesWritten = 0;

    // 16 x 3


    wstring map;          //^
    map += L"################################################";
    map += L"#..............................................#";
    map += L"#.......########........########........########";
    map += L"#..............#...............#...............#";
    map += L"#......##......#.......##......#.......##......#";
    map += L"#......##......#.......##......#.......##......#";
    map += L"#..............#...............#...............#";
    map += L"###............#.##............#.##............#";
    map += L"##.............#.#.............#.#.............#";
    map += L"#......####..###.......####..###.......####..###";
    map += L"#......#.......#.......#.......#.......#.......#";
    map += L"#......#.......#.......#.......#.......#.......#";
    map += L"#..............#...............#...............#";
    map += L"#......#########.......#########.......#########";
    map += L"#..............#...............................#";
    map += L"#..............................................#";
    map += L"#..............................................#";
    map += L"#..............................................#";
    map += L"#.......########........########........########";
    map += L"#..............#...............#...............#";
    map += L"#......##......#.......##......#.......##......#";
    map += L"#......##......#.......##......#.......##......#";
    map += L"#..............#...............#...............#";
    map += L"###............#.##............#.##............#";
    map += L"##.............#.#.............#.#.............#";
    map += L"#......####..###.......####..###.......####..###";
    map += L"#......#.......#.......#.......#.......#.......#";
    map += L"#......#.......#.......#.......#.......#.......#";
    map += L"#..............#...............#...............#";
    map += L"#......#########.......#########.......#########";
    map += L"#..............#...............................#";
    map += L"#..............................................#";
    map += L"#..............................................#";
    map += L"#..............................................#";
    map += L"#.......########........########........########";
    map += L"#..............#...............#...............#";
    map += L"#......##......#.......##......#.......##......#";
    map += L"#......##......#.......##......#.......##......#";
    map += L"#..............#...............#...............#";
    map += L"###............#.##............#.##............#";
    map += L"##.............#.#.............#.#.............#";
    map += L"#......####..###.......####..###.......####..###";
    map += L"#......#.......#.......#.......#.......#.......#";
    map += L"#......#.......#.......#.......#.......#.......#";
    map += L"#..............#...............#...............#";
    map += L"#......#########.......#########.......#########";
    map += L"#..............#...............................#";
    map += L"################################################";

    const int TICKS_PER_SECOND = 20;
    const int SKIP_TICKS = 1000 / TICKS_PER_SECOND;
    const int MAX_FRAMESKIP = 10;

    DWORD next_game_tick = GetTickCount();
    int loops;
    bool game_is_running = true;

    while (game_is_running)
    
        loops = 0;

        while (GetTickCount() > next_game_tick && loops < MAX_FRAMESKIP)
        
            // Update
            for (int i = 0; i < screenWidth * screenHeight; i++)
            
                screen[i] = ' ';
            

            if (GetAsyncKeyState((unsigned short)'A'))
            
                if (map[(playerX - 1) + mapWidth * playerY] == '#')
                
                    break;
                
                else
                
                    playerX--;
                
            


            if (GetAsyncKeyState((unsigned short)'D'))
            
                if (map[(playerX + 1) + mapWidth * playerY] == '#')
                
                    break;
                
                else
                
                    playerX++;
                
            

            if (GetAsyncKeyState((unsigned short)'S'))
            
                if (map[playerX + mapWidth * (playerY + 1)] == '#')
                
                    break;
                
                else
                
                    playerY++;
                
            

            if (GetAsyncKeyState((unsigned short)'W'))
            
                if (map[playerX + mapWidth * (playerY - 1)] == '#')
                
                    break;
                
                else
                
                    playerY--;
                
            


            next_game_tick += SKIP_TICKS;
            loops++;
        

        // Draw the map to the buffer
        for (int y = 0; y < mapHeight; y++)
        
            for (int x = 0; x < mapWidth; x++)
            
                screen[x + screenWidth * y] = map[x + mapWidth * y];
            
            screen[playerX + screenWidth * playerY] = '@'; // Draw the player
        

        // Display the Buffer
        screen[screenWidth * screenHeight - 1] = '\0';
        WriteConsoleOutputCharacter(consoleHandle, screen, screenWidth * screenHeight,  0,0 , &bytesWritten);
    

【问题讨论】：

map 对于使用命名空间 std 的人来说是一个危险的变量名称。

你是对的。没有考虑它，因为我正在做这个来测试一些东西。我会改变的。谢谢。

@scohe001 仅当他们没有练习安全的 c++ 时；永远不要让你的stds 出去。

您可以首先验证您是否正在访问map 字符串范围之外的元素。您可以通过使用at() 访问元素来做到这一点。也可以使用std::vector 而不是new/delete——然后您可以使用与at 调用相同的技术。

@PaulMcKenzie 谢谢，我试一试。希望我可以正确地实现它，但我也开始怀疑它是否与线程有关（请参阅原始帖子上的编辑）。在我的不和谐聊天中有人提到，我没有线程经验。你有没有看到任何会导致线程问题的东西？

【参考方案1】：

我解决了这个问题。我的地图阵列比我的屏幕阵列大，导致了这个问题。我无法深入解释这是如何导致错误的，但确实如此。添加 2d 相机后，将其锁定到玩家坐标，并将其夹在地图数组的边界上，它现在可以正常工作了。我现在还有一整套其他问题要处理，但这一个可以标记为已解决。如果其他人可以解释为什么这是一个令人惊讶的问题的深层原因。谢谢。