内存池和<无法读取内存>

我最近将项目切换为使用我写过的线性内存分配器（用于学习）。当我初始化分配器时，我将其传递给了一个预先属于VirtualAlloc-ed的内存块。在编写分配器之前，我直接使用了此块。

在我的测试案例中，我正在使用分配器在最初的大块内存中分配播放器*的内存。为了确保每个人都在工作，我尝试像以前一样直接访问内存块，以确保根据我的期望而变化。那是我碰到内存访问错误的时候。使用VS调试器/手表窗口，我对发生的事情和何时有一个合理的想法，但是我希望在原因的问题上获得一些帮助。我将在下面布置相关的代码。

虚拟Alloc调用，后来由内存 -> TransientStorage

win32_State.gameMemoryBlock = VirtualAlloc(baseAddress, (size_t)win32_State.totalSize, 
                                                MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);

分配器定义

struct LinearAllocator {
    void* currentPos;
    size_t totalSize;
    void* startPos;
    size_t usedMemory;
    size_t numAllocations;
    LinearAllocator();
    LinearAllocator(size_t size, void* start);
    LinearAllocator(LinearAllocator&) = delete;
    ~LinearAllocator();
    void* allocate(size_t size, uint8 alignment);
    void clear();
};

播放器和VEC2F定义

struct Player {
    Vec2f pos;
    bool32 isFiring;
    real32 timeLastFiredMS;
};
union Vec2f {
    struct {
        real32 x, y;
    };
    real32 v[2];
};

相关分配器实现详细信息

void* LinearAllocator::allocate(size_t size, uint8_t alignment) {
    if (size == 0 || !isPowerOfTwo(alignment)) {
        return nullptr;
    }
    uint8_t adjustment = alignForwardAdjustment(currentPos, alignment);
    if (usedMemory + adjustment + size > totalSize) {
        return nullptr;
    }
    uint8_t* alignedAddress = (uint8*)currentPos + adjustment;
    currentPos = (void*)(alignedAddress + size);
    usedMemory += size + adjustment;
    numAllocations++;
    return (void*)alignedAddress;
}
inline uint8_t alignForwardAdjustment(void* address, uint8_t alignment) {
    uint8_t adjustment = alignment - ( (size_t)address & (size_t)(alignment - 1));
    if (adjustment == alignment) {
        return 0; // already aligned
    }
    return adjustment;
}
inline int32_t isPowerOfTwo(size_t value) {
    return value != 0 && (value & (value - 1)) == 0;
}

初始化代码，我尝试使用分配器

// **Can write to memory fine here**
((float*)memory->transientStorage)[0] = 4.f;
size_t simulationAllocationSize = memory->transientStorageSize / 2 / sizeof(real32);
simulationMemory = LinearAllocator(simulationAllocationSize, &memory->transientStorage + (uint8_t)0);
for (int i = 0; i < MAX_PLAYERS; i++) {
    Player* p = (Player*)simulationMemory.allocate(sizeof(Player), 4);
    // **also works here**
    ((real32*)memory->transientStorage)[0] = 3.f;
    p->pos.x = 0.f; // **after this line, I got the unable to read memory error**
    p->pos.y = 0.f;
    p->isFiring = false;
    p->timeLastFiredMS = 0.f;
    // **can't write **
    ((real32*)memory->transientStorage)[0] = 1.f;
}
// **also can't write**
((real32*)memory->transientStorage)[0] = 2.f;
real32 test = ((real32*)memory->transientStorage)[0];

我的运行假设是我缺少明显的东西。但是，我唯一要解决的线索是，在播放器结构中设置值后，它更改了。这里的任何帮助将不胜感激！