Bug 223337

https://www.khronos.org/registry/webgl/sdk/tests/conformance/misc/expando-loss.html?webglVersion=2&quiet=0&quick=1 This test verifies that WebGL object expandos are preserved across garbage collections. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Basic Bindings PASS getParameter(TEXTURE_BINDING_2D) returns instance that was bound. PASS getParameter(TEXTURE_BINDING_2D): Expect basic expando to survive despite GC. PASS getParameter(TEXTURE_BINDING_2D): Expect subobject expando to survive despite GC. PASS getParameter(FRAMEBUFFER_BINDING) returns instance that was bound. PASS getParameter(FRAMEBUFFER_BINDING): Expect basic expando to survive despite GC. PASS getParameter(FRAMEBUFFER_BINDING): Expect subobject expando to survive despite GC. PASS getParameter(RENDERBUFFER_BINDING) returns instance that was bound. PASS getParameter(RENDERBUFFER_BINDING): Expect basic expando to survive despite GC. PASS getParameter(RENDERBUFFER_BINDING): Expect subobject expando to survive despite GC. PASS getParameter(ELEMENT_ARRAY_BUFFER_BINDING) returns instance that was bound. PASS getParameter(ELEMENT_ARRAY_BUFFER_BINDING): Expect basic expando to survive despite GC. PASS getParameter(ELEMENT_ARRAY_BUFFER_BINDING): Expect subobject expando to survive despite GC. PASS getParameter(ARRAY_BUFFER_BINDING) returns instance that was bound. PASS getParameter(ARRAY_BUFFER_BINDING): Expect basic expando to survive despite GC. PASS getParameter(ARRAY_BUFFER_BINDING): Expect subobject expando to survive despite GC. PASS getParameter(TEXTURE_BINDING_CUBE_MAP) returns instance that was bound. PASS getParameter(TEXTURE_BINDING_CUBE_MAP): Expect basic expando to survive despite GC. PASS getParameter(TEXTURE_BINDING_CUBE_MAP): Expect subobject expando to survive despite GC. Programs and Shaders PASS getParameter(gl.CURRENT_PROGRAM) return instance set with useProgram PASS Vertex shader instance found in getAttachedShaders PASS Fragment shader instance found in getAttachedShaders PASS Current program: Expect basic expando to survive despite GC. PASS Current program: Expect subobject expando to survive despite GC. PASS [object WebGLProgram] is an instance of WebGLProgram PASS Shader[0]: Expect basic expando to survive despite GC. PASS Shader[0]: Expect subobject expando to survive despite GC. PASS [object WebGLShader] is an instance of WebGLShader PASS Shader[1]: Expect basic expando to survive despite GC. PASS Shader[1]: Expect subobject expando to survive despite GC. PASS [object WebGLShader] is an instance of WebGLShader Vertex Attribute Buffers PASS getVertexAttrib(VERTEX_ATTRIB_ARRAY_BUFFER_BINDING) return instance set with vertexAttribPointer PASS Vertex Attribute Buffer: Expect basic expando to survive despite GC. PASS Vertex Attribute Buffer: Expect subobject expando to survive despite GC. PASS [object WebGLBuffer] is an instance of WebGLBuffer FrameBuffer Attachments PASS getFramebufferAttachmentParameter(COLOR_ATTACHMENT0) returns instance set with framebufferRenderbuffer PASS getFramebufferAttachmentParameter(DEPTH_ATTACHMENT) returns instance set with framebufferRenderbuffer PASS getFramebufferAttachmentParameter(STENCIL_ATTACHMENT) returns instance set with framebufferRenderbuffer FAIL getFramebufferAttachmentParameter(DEPTH_STENCIL_ATTACHMENT) returns instance set with framebufferRenderbuffer PASS COLOR_ATTACHMENT0: Expect basic expando to survive despite GC. PASS COLOR_ATTACHMENT0: Expect subobject expando to survive despite GC. PASS [object WebGLRenderbuffer] is an instance of WebGLRenderbuffer PASS DEPTH_ATTACHMENT: Expect basic expando to survive despite GC. PASS DEPTH_ATTACHMENT: Expect subobject expando to survive despite GC. PASS [object WebGLRenderbuffer] is an instance of WebGLRenderbuffer PASS STENCIL_ATTACHMENT: Expect basic expando to survive despite GC. PASS STENCIL_ATTACHMENT: Expect subobject expando to survive despite GC. PASS [object WebGLRenderbuffer] is an instance of WebGLRenderbuffer FAIL successfullyParsed should be true (of type boolean). Was undefined (of type undefined). TEST COMPLETE

At least macOS 11.3, iMacPro1,1, Radeon Pro Vega 56

<rdar://problem/75773979>

Committed 252695@main (70f7b05838c5): <https://commits.webkit.org/252695@main> Reviewed commits have been landed. Closing PR #2038 and removing active labels.