调试模式中未处理的异常,但在发布时工作正常

Question

我不知道为什么但是这个代码在64位编译时在调试模式下给出了这个错误:

OpenGL.exe中0x000000013f488f55处的未处理异常:0xC0000005:访问冲突读取位置0x000000053f4d9778.

但是,它在发布模式下工作得非常好,在32位编译时调试和发布都很好!非常感谢帮助.

我正在使用Visual Studio 2010.

float g_History[20] = { 0.0f };
const float g_WeightModifier = 0.25f;

void CInput::SmoothMouseMovement()
{
    if(!m_SmoothMouse) return;

    for(UINT i = 0; i < 10; i++)
    {
        g_History[i * 2] = g_History[(i - 1) * 2]; // This line gives the error
        g_History[i * 2 + 1] = g_History[(i - 1) * 2 + 1];
    }

    g_History[0] = m_MouseState.X;
    g_History[1] = m_MouseState.Y;

    float AverageX = 0.0f;
    float AverageY = 0.0f;
    float AverageTotal = 0.0f;
    float WeightModifier = 1.0f;

    for(UINT i = 0; i < 10; i++)
    {
        AverageX += g_History[i * 2] * WeightModifier;
        AverageY += g_History[i * 2 + 1] * WeightModifier;
        AverageTotal += 1.0f * WeightModifier;
        WeightModifier *= g_WeightModifier;
    }

    m_MouseState.X = AverageX / AverageTotal;
    m_MouseState.Y = AverageY / AverageTotal;
}

Answer 1

第一次通过你的循环,g_History[(i - 1) * 2]将相当于g_History [-2],这显然是一个糟糕的访问.关于如何使用32v64和debug v release安排内存,这简直是巧合.无论您的应用是否崩溃,该行都是错误的.