c++ - vkCreateInstance引发段错误

我正在尝试学习一些Vulkan，而vkCreateInstance有一个奇怪的问题。似乎仅在非常特定的情况下会引发分段错误。更清楚地说，这是一些代码：

int main() {
    // Load Vulkan Functions, extensions and stuff
    VkApplicationInfo applicationInfo;
    applicationInfo.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
    applicationInfo.pNext = nullptr;
    applicationInfo.pApplicationName = "VulkanDoodles";
    applicationInfo.applicationVersion = VK_MAKE_VERSION(1,0,0);
    applicationInfo.pEngineName = "EngineNamePlaceholder";
    applicationInfo.engineVersion = VK_MAKE_VERSION(1,0,0);
    applicationInfo.apiVersion = VK_MAKE_VERSION(1,0,0);

    VkInstanceCreateInfo instanceCreateInfo;
    instanceCreateInfo.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
    instanceCreateInfo.pNext = nullptr;
    instanceCreateInfo.flags = 0;
    instanceCreateInfo.pApplicationInfo = &applicationInfo;
    instanceCreateInfo.ppEnabledLayerNames = nullptr;
    instanceCreateInfo.enabledExtensionCount = (uint32_t)desired_extensions.size();
    instanceCreateInfo.ppEnabledExtensionNames = &desired_extensions[0];

    VkInstance instance;
    if(vk::vkCreateInstance(&instanceCreateInfo, nullptr, &instance) != VK_SUCCESS){
        std::cout << "Could not create instance" << std::endl;
        return -1;
    }
    // rest of the code
    return 0;
}

它运行正常，实例已创建。因此，我决定将代码放入函数中以提高可读性。但是下面的代码不再起作用：

VkInstance CreateInstance(const std::vector<const char*> extensions){
    VkApplicationInfo applicationInfo;
    applicationInfo.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
    applicationInfo.pNext = nullptr;
    applicationInfo.pApplicationName = "VulkanDoodles";
    applicationInfo.applicationVersion = VK_MAKE_VERSION(1,0,0);
    applicationInfo.pEngineName = "EngineNamePlaceholder";
    applicationInfo.engineVersion = VK_MAKE_VERSION(1,0,0);
    applicationInfo.apiVersion = VK_MAKE_VERSION(1,0,0);

    VkInstanceCreateInfo instanceCreateInfo;
    instanceCreateInfo.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
    instanceCreateInfo.pNext = nullptr;
    instanceCreateInfo.flags = 0;
    instanceCreateInfo.pApplicationInfo = &applicationInfo;
    instanceCreateInfo.ppEnabledLayerNames = nullptr;
    instanceCreateInfo.enabledExtensionCount = (uint32_t)extensions.size();
    instanceCreateInfo.ppEnabledExtensionNames = &extensions[0];
    VkInstance instance;
    if(vk::vkCreateInstance(&instanceCreateInfo, nullptr, &instance) != VK_SUCCESS){
        std::cout << "Could not create instance" << std::endl;
    }
    return instance;
}

int main(){
    // Load Vulkan Functions, extensions and stuff
    VkInstance instance = CreateInstance(desired_extensions);
    // rest of the code
}

调用vkCreateInstance会引发分段错误。考虑到下一个代码片段可以正常工作，扩展向量似乎并不是问题所在：

VkInstanceCreateInfo CreateInstanceInfo(const std::vector<const char*>& extensions){
    VkApplicationInfo applicationInfo;
    applicationInfo.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
    applicationInfo.pNext = nullptr;
    applicationInfo.pApplicationName = "VulkanDoodles";
    applicationInfo.applicationVersion = VK_MAKE_VERSION(1,0,0);
    applicationInfo.pEngineName = "EngineNamePlaceholder";
    applicationInfo.engineVersion = VK_MAKE_VERSION(1,0,0);
    applicationInfo.apiVersion = VK_MAKE_VERSION(1,0,0);

    VkInstanceCreateInfo instanceCreateInfo;
    instanceCreateInfo.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
    instanceCreateInfo.pNext = nullptr;
    instanceCreateInfo.flags = 0;
    instanceCreateInfo.pApplicationInfo = &applicationInfo;
    instanceCreateInfo.ppEnabledLayerNames = nullptr;
    instanceCreateInfo.enabledExtensionCount = (uint32_t)extensions.size();
    instanceCreateInfo.ppEnabledExtensionNames = &extensions[0];

    return instanceCreateInfo;
}

VkInstance CreateInstance(const VkInstanceCreateInfo& instanceCreateInfo){
    VkInstance instance;
    if(vk::vkCreateInstance(&instanceCreateInfo, nullptr, &instance) != VK_SUCCESS){
        std::cout << "Could not create instance" << std::endl;
    }
    return instance;
}

int main(){
    // Load Vulkan Functions, extensions and stuff
    VkInstanceCreateInfo instanceCreateInfo = CreateInstanceInfo(desired_extensions);
    VkInstance instance = CreateInstance(instanceCreateInfo);
    // rest of the code
}

如前所述，这很好，我的猜测是必须在VkInstanceCreateInfo函数内声明main变量。

所以我的问题是：

为什么vkCreateInstance抛出段错误？为什么只有有时候呢？那里有什么奇怪的事情吗？

任何见解将非常有帮助。

同样出于记录目的，我将Linux Mint和CLion与cmake版本3.13一起使用（不确定是否重要）

最佳答案

您的中间代码段缺少enabledLayerCount初始化，因此使驱动程序执行OOBA。

您的最后一个代码段返回instanceCreateInfo，其中pApplicationInfo在被VkApplicationInfo使用时指向被破坏的vkCreateInstance。您使驱动程序取消引用指针以破坏内存。

关于c++ - vkCreateInstance引发段错误，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/54841772/