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android / device / generic / vulkan-cereal / refs/tags/android-s-v2-preview-2
tag73423d45ba145ee35df2feae792a56bc2bbeb6e5
taggerThe Android Open Source Project <initial-contribution@android.com>Wed Jan 12 10:35:42 2022 -0800
object2129ac63d68a26283f8f98c9d171c823b2666983 
Android S v2 Preview 2 (S2B2.211203.006)
commit2129ac63d68a26283f8f98c9d171c823b2666983[log] [tgz]
authorGeorge Burgess IV <gbiv@google.com>Thu Oct 21 14:38:09 2021 -0700
committerGeorge Burgess IV <gbiv@google.com>Thu Oct 21 14:43:46 2021 -0700
tree241d6740d1dfd42c5c9a6cbbc318716781077b31
parentcea8e84af507bc49867445b700674ef9fffbce2d [diff]
gles: fix uses of uninitialized values

glGenFramebuffersOES and glGenRenderbuffersOES can fail internally,
which leaves these variables unset. We do zero-init stack variables by
default on Android, but it's uncertain if this behavior will persist
for the remainder of time. Make the tool happy and make the
initialization explicit.

Caught by the static analyzer:

> device/generic/vulkan-cereal/stream-servers/glestranslator/GLES_CM/GLEScmImp.cpp:2746:9:
warning: 2nd function call argument is an uninitialized value
[clang-analyzer-core.CallAndMessage]
> device/generic/vulkan-cereal/stream-servers/glestranslator/GLES_CM/GLEScmImp.cpp:2748:9:
warning: 2nd function call argument is an uninitialized value
[clang-analyzer-core.CallAndMessage]
> device/generic/vulkan-cereal/stream-servers/glestranslator/GLES_CM/GLEScmImp.cpp:2770:9:
warning: 2nd function call argument is an uninitialized value
[clang-analyzer-core.CallAndMessage]

Bug: None
Test: TreeHugger
Change-Id: I522e23eba205da54af6532b4240920d231d89b9b
1 file changed
tree: 241d6740d1dfd42c5c9a6cbbc318716781077b31
  1. base/
  2. fake-android-guest/
  3. host-common/
  4. include/
  5. protocols/
  6. scripts/
  7. snapshot/
  8. stream-servers/
  9. testenvs/
  10. third-party/
  11. .clang-format
  12. .gitignore
  13. Android.bp
  14. android.cmake
  15. build-host.sh
  16. BUILD.gn
  17. CMakeLists.txt
  18. gtest.cmake
  19. gtestdownloadCMakeLists.txt.in
  20. METADATA
  21. README.md
README.md

Graphics Streaming Kit (formerly: Vulkan Cereal)

Graphics Streaming Kit is a code generator that makes it easier to serialize and forward graphics API calls from one place to another:

  • From a virtual machine guest to host for virtualized graphics
  • From one process to another for IPC graphics
  • From one computer to another via network sockets

Build: Linux

Make sure the latest CMake is installed. Make sure the opengl lib is installed. Otherwise, sudo apt-get install libglu1-mesa-dev freeglut3-dev mesa-common-dev Make sure you are using Clang as your CC and clang++ as yourCXX. Then

mkdir build
cd build
cmake . ../
make -j24

Unit tests:

make test

Build: Windows

Make sure the latest CMake is installed. Make sure Visual Studio 2019 is installed on your system along with all the Clang C++ toolchain components. Then

mkdir build
cd build
cmake . ../ -A x64 -T ClangCL

A solution file should be generated. Then open the solution file in Visual studio and build the gfxstream_backend target.

Build: Android for host

Be in the Android build system. Then

m libgfxstream_backend

It then ends up in out/host

This also builds for Android on-device.

Output artifacts

libgfxstream_backend.(dll|so|dylib)

Regenerating Vulkan code

scripts/generate-vulkan-sources.sh

If you're in an AOSP checkout, this will also modify contents of the guest Vulkan encoder in ../goldfish-opengl.

Regenerating GLES/RenderControl code

First, build build/gfxstream-generic-apigen. Then run

scripts/generate-apigen-source.sh

Tests

Linux Tests

There are a bunch of test executables generated. They require libEGL.so and libGLESv2.so and libvulkan.so to be available, possibly from your GPU vendor or ANGLE, in the $LD_LIBRARY_PATH.

Windows Tests

There are a bunch of test executables generated. They require libEGL.dll and libGLESv2.dll and vulkan-1.dll to be available, possibly from your GPU vendor or ANGLE, in the %PATH%.

Android Host Tests

These are currently not built due to the dependency on system libEGL/libvulkan to run correctly.

Structure

  • CMakeLists.txt: specifies all host-side build targets. This includes all backends along with client/server setups that live only on the host. Some
    • Backend implementations
    • Implementations of the host side of various transports
    • Frontends used for host-side testing with a mock implementation of guest graphics stack (mainly Android)
    • Frontends that result in actual Linux/macOS/Windows gles/vk libraries (isolation / fault tolerance use case)
  • Android.bp: specifies all guest-side build targets for Android:
    • Implementations of the guest side of various transports (above the kernel)
    • Frontends
  • BUILD.gn: specifies all guest-side build targets for Fuchsia
    • Implementations of the guest side of various transports (above the kernel)
    • Frontends
  • base/: common libraries that are built for both the guest and host. Contains utility code related to synchronization, threading, and suballocation.
  • protocols/: implementations of protocols for various graphics APIs. May contain code generators to make it easy to regen the protocol based on certain things.
  • host-common/: implementations of host-side support code that makes it easier to run the server in a variety of virtual device environments. Contains concrete implementations of auxiliary virtual devices such as Address Space Device and Goldfish Pipe.
  • stream-servers/: implementations of various backends for various graphics APIs that consume protocol. gfxstream-virtio-gpu-renderer.cpp contains a virtio-gpu backend implementation.