kc3-lang/angle

2020-05-12T18:13:52

Resolve Bad Binary Link Failures When ANGLE_PROGRAM_BINARY_LOAD is enabled, Program::loadBinary unconditionally returns angle::Result::Continue to the caller. The caller, gl::Program::link, postpones the resolution of the link until resolveLinkImpl. Unfortunately, resolveLinkImpl is not able to tell whether the link failed because the shader from the developer is bad or because the loaded binary is not compatible with the backend. The former case should fail link. In the latter case, we should fallback to linking the program from the original shader sources. The loaded binary could be read from the on-disk shader cache and be corrupted or serialized with different revision and subsystem id than the currently loaded ANGLE backend. This fix adjusts Program::loadBinary and ProgramD3D::load so that angle::Result::Incomplete is returned to gl::Program::link when the binary is incompatible with the backend. gl::Program:link falls back to compilation from original shader sources. Since no code checks the return value of SizedMRUCache::eraseByKey, modified it to now return void. Bug: chromium:1079497 Change-Id: Id5271d7badad8627563e87859d1c9fdb81de5785 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2197944 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Rafael Cintron <rafael.cintron@microsoft.com>