trimming: Add _uv_hook_close support (#58871)

Resolves #58862.

Since this hook is called internally by the runtime, `--trim` was not
aware of the callee edge required here.

Author: topolarity

base/libuv.jl

@@ -39,8 +39,15 @@ macro handle_as(hand, typ)
     end
 end
 
-@nospecializeinfer associate_julia_struct(handle::Ptr{Cvoid}, @nospecialize(jlobj)) =
+function _uv_hook_close end
+
+function associate_julia_struct(handle::Ptr{Cvoid}, jlobj::T) where T
+    # This `cfunction` is not used anywhere, but it triggers compilation of this
+    # MethodInstance for `--trim` so that it will be available when dispatched to
+    # by `jl_uv_call_close_callback()`
+    _ = @cfunction(Base._uv_hook_close, Cvoid, (Ref{T},))
     ccall(:jl_uv_associate_julia_struct, Cvoid, (Ptr{Cvoid}, Any), handle, jlobj)
+end
 disassociate_julia_struct(uv) = disassociate_julia_struct(uv.handle)
 disassociate_julia_struct(handle::Ptr{Cvoid}) =
     handle != C_NULL && ccall(:jl_uv_disassociate_julia_struct, Cvoid, (Ptr{Cvoid},), handle)

src/staticdata.c

@@ -732,7 +732,8 @@ static void jl_queue_module_for_serialization(jl_serializer_state *s, jl_module_
                  !strcmp(jl_symbol_name(b->globalref->name), "__init__") ||
                  // ... or point to Base functions accessed by the runtime
                  (m == jl_base_module && (!strcmp(jl_symbol_name(b->globalref->name), "wait") ||
-                                          !strcmp(jl_symbol_name(b->globalref->name), "task_done_hook"))))) {
+                                          !strcmp(jl_symbol_name(b->globalref->name), "task_done_hook") ||
+                                          !strcmp(jl_symbol_name(b->globalref->name), "_uv_hook_close"))))) {
                 jl_queue_for_serialization(s, b);
             }
         }

test/trimming/basic_jll.jl

@@ -18,6 +18,8 @@ function @main(args::Vector{String})::Cint
     println(Core.stdout, ver)
     @assert ver == build_ver
 
+    sleep(0.01)
+
     # Add an indirection via `@cfunction` / 1-arg ccall
     cfunc = @cfunction(print_string, Cvoid, (Ptr{Cvoid},))
     fptr = dlsym(Zstd_jll.libzstd_handle, :ZSTD_versionString)