glthread: don't execute Draw and BufferSubData calls if the context is lost

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20624>

src/mesa/main/glthread_bufferobj.c

@@ -505,6 +505,7 @@ _mesa_marshal_BufferSubData_merged(GLuint target_or_name, GLintptr offset,
     *       the buffer storage, but we don't know the buffer size in glthread.
     */
    if (ctx->Const.AllowGLThreadBufferSubDataOpt &&
+       ctx->CurrentServerDispatch != ctx->ContextLost &&
        data && offset > 0 && size > 0) {
       struct gl_buffer_object *upload_buffer = NULL;
       unsigned upload_offset = 0;

src/mesa/main/glthread_marshal.h

@@ -148,6 +148,7 @@ _mesa_glthread_update_draw_always_async(struct gl_context *ctx)
    /* Executing erroneous cases will just generate GL_INVALID_OPERATION. */
    ctx->GLThread.draw_always_async =
       ctx->API == API_OPENGL_CORE ||
+      ctx->CurrentServerDispatch == ctx->ContextLost ||
       ctx->GLThread.inside_begin_end ||
       ctx->GLThread.ListMode;
 }

src/mesa/main/robustness.c

@@ -29,6 +29,7 @@
 #include "macros.h"
 #include "main/dispatch.h" /* for _gloffset_COUNT */
 #include "api_exec_decl.h"
+#include "glthread_marshal.h"
 
 static void GLAPIENTRY
 _context_lost_GetSynciv(GLsync sync, GLenum pname, GLsizei bufSize,
@@ -104,6 +105,7 @@ _mesa_set_context_lost_dispatch(struct gl_context *ctx)
 
    ctx->CurrentServerDispatch = ctx->ContextLost;
    _glapi_set_dispatch(ctx->CurrentServerDispatch);
+   _mesa_glthread_update_draw_always_async(ctx);
 }
 
 /**