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fuchsia / third_party / Vulkan-Loader / refs/tags/sdk-1.2.198.0
commitfe8479aa022a011d74fd862749825e07891e854e[log] [tgz]
authorCharles Giessen <charles@lunarg.com>Wed Nov 17 14:44:11 2021 -0700
committerCharles Giessen <charles@lunarg.com>Wed Nov 17 15:28:51 2021 -0700
tree909c6197d7945abdb65cc0dcfbcdb5011482257f
parent4f78f14c0533303c829edf1caf4e5f77bec0b3c4 [diff]
Dont call ToolProps on drivers without support

The loader recently added support for calling into drivers in
vkGetPhysicalDeviceToolPropertieesEXT. However, it only used the value of
the function pointer to determine if it was safe. It was found that Mesa
drivers will return a non-null function pointer, even though they do not
support the extension, and so the loader called this function pointer which
would then segfault.

The loader prevents this by first checking if the extension is supported by
the physical device. This necessitates calling
vkEnumerateDeviceExtensionProperties and allocating some memory on each call
but since the number of times this function is called should be low, it is
not an undue performance burden. In the future, the loader should cache the
list of extensions when calling vkEnumeratePhysicalDevices so that checking if
a extension function is supported is fast and easy.
2 files changed
tree: 909c6197d7945abdb65cc0dcfbcdb5011482257f
  1. .github/
  2. build-gn/
  3. build-qnx/
  4. cmake/
  5. docs/
  6. fuchsia/
  7. loader/
  8. scripts/
  9. tests/
  10. .clang-format
  11. .cmake-format.py
  12. .gitattributes
  13. .gitignore
  14. .gn
  15. BUILD.gn
  16. BUILD.md
  17. CMakeLists.txt
  18. CODE_OF_CONDUCT.md
  19. CONTRIBUTING.md
  20. GOVERNANCE.md
  21. LICENSE.txt
  22. README.md
  23. vulkan.symbols.api
README.md

Vulkan Ecosystem Components

This project provides the Khronos official Vulkan ICD desktop loader for Windows, Linux, and MacOS.

CI Build Status

Build Status

Introduction

Vulkan is an explicit API, enabling direct control over how GPUs actually work. As such, Vulkan supports systems that have multiple GPUs, each running with a different driver, or ICD (Installable Client Driver). Vulkan also supports multiple global contexts (instances, in Vulkan terminology). The ICD loader is a library that is placed between a Vulkan application and any number of Vulkan drivers, in order to support multiple drivers and the instance-level functionality that works across these drivers. Additionally, the loader manages inserting Vulkan layer libraries, such as validation layers, between an application and the drivers.

This repository contains the Vulkan loader that is used for Linux, Windows, MacOS, and iOS. There is also a separate loader, maintained by Google, which is used on Android.

The following components are available in this repository:

Contact Information

Information for Developing or Contributing

Please see the CONTRIBUTING.md file in this repository for more details. Please see the GOVERNANCE.md file in this repository for repository management details.

How to Build and Run

BUILD.md Includes directions for building all components.

Architecture and interface information for the loader is in docs/LoaderInterfaceArchitecture.md.

Version Tagging Scheme

Updates to the Vulkan-Loader repository which correspond to a new Vulkan specification release are tagged using the following format: v<version> (e.g., v1.1.96).

Note: Marked version releases have undergone thorough testing but do not imply the same quality level as SDK tags. SDK tags follow the sdk-<version>.<patch> format (e.g., sdk-1.1.92.0).

This scheme was adopted following the 1.1.96 Vulkan specification release.

License

This work is released as open source under a Apache-style license from Khronos including a Khronos copyright.

Acknowledgements

While this project has been developed primarily by LunarG, Inc., there are many other companies and individuals making this possible: Valve Corporation, funding project development; Khronos providing oversight and hosting of the project.