CCF_100/suyu-mirror
1
0
Fork 0
mirror of https://git.suyu.dev/suyu/suyu synced 2025-11-03 16:39:01 -06:00
Code Issues Releases Wiki Activity

Merge pull request #3463 from ReinUsesLisp/vk-toctou

Browse Source 
vk_swapchain: Silence TOCTOU race condition
This commit is contained in:
bunnei
2020-03-05 19:38:42 -05:00
committed by GitHub
parent 4a8fe67964 0aaa69e4d7
commit 49eff536d0
1 changed files with 12 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/video_core/renderer_vulkan/vk_swapchain.cpp
View File

@@ -141,11 +141,6 @@ void VKSwapchain::CreateSwapchain(const vk::SurfaceCapabilitiesKHR& capabilities
const vk::SurfaceFormatKHR surface_format{ChooseSwapSurfaceFormat(formats, srgb)};
const vk::PresentModeKHR present_mode{ChooseSwapPresentMode(present_modes)};
extent = ChooseSwapExtent(capabilities, width, height);
current_width = extent.width;
current_height = extent.height;
current_srgb = srgb;
u32 requested_image_count{capabilities.minImageCount + 1};
if (capabilities.maxImageCount > 0 && requested_image_count > capabilities.maxImageCount) {
@@ -153,10 +148,9 @@ void VKSwapchain::CreateSwapchain(const vk::SurfaceCapabilitiesKHR& capabilities
}
vk::SwapchainCreateInfoKHR swapchain_ci(
{}, surface, requested_image_count, surface_format.format, surface_format.colorSpace,
extent, 1, vk::ImageUsageFlagBits::eColorAttachment, {}, {}, {},
capabilities.currentTransform, vk::CompositeAlphaFlagBitsKHR::eOpaque, present_mode, false,
{});
{}, surface, requested_image_count, surface_format.format, surface_format.colorSpace, {}, 1,
vk::ImageUsageFlagBits::eColorAttachment, {}, {}, {}, capabilities.currentTransform,
vk::CompositeAlphaFlagBitsKHR::eOpaque, present_mode, false, {});
const u32 graphics_family{device.GetGraphicsFamily()};
const u32 present_family{device.GetPresentFamily()};
@@ -169,9 +163,18 @@ void VKSwapchain::CreateSwapchain(const vk::SurfaceCapabilitiesKHR& capabilities
swapchain_ci.imageSharingMode = vk::SharingMode::eExclusive;
}
// Request the size again to reduce the possibility of a TOCTOU race condition.
const auto updated_capabilities = physical_device.getSurfaceCapabilitiesKHR(surface, dld);
swapchain_ci.imageExtent = ChooseSwapExtent(updated_capabilities, width, height);
// Don't add code within this and the swapchain creation.
const auto dev{device.GetLogical()};
swapchain = dev.createSwapchainKHRUnique(swapchain_ci, nullptr, dld);
extent = swapchain_ci.imageExtent;
current_width = extent.width;
current_height = extent.height;
current_srgb = srgb;
images = dev.getSwapchainImagesKHR(*swapchain, dld);
image_count = static_cast<u32>(images.size());
image_format = surface_format.format;