File 4586-Remove-intermediate-starter-process.patch of Package erlang

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File 4586-Remove-intermediate-starter-process.patch of Package erlang (Revision 54461a2357af3de1f765489d2fd0ee14)

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From e5a56843c80845cb835a797b9802109ba0bdd77b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Muska=C5=82a?= <micmus@fb.com>
Date: Tue, 23 Jan 2024 16:06:26 +0000
Subject: [PATCH 6/6] Remove intermediate starter process

---
 lib/kernel/src/application_controller.erl | 18 ++----------------
 lib/kernel/src/application_master.erl     | 15 ++++++++-------
 2 files changed, 10 insertions(+), 23 deletions(-)

diff --git a/lib/kernel/src/application_controller.erl b/lib/kernel/src/application_controller.erl
index 2398f1dfc5..0363b7597a 100644
--- a/lib/kernel/src/application_controller.erl
+++ b/lib/kernel/src/application_controller.erl
@@ -36,7 +36,7 @@
 
 %% Internal exports
 -export([handle_call/3, handle_cast/2, handle_info/2, terminate/2,
-	 code_change/3, init_starter/2, get_loaded/1]).
+	 code_change/3, get_loaded/1]).
 
 %% logger callback
 -export([format_log/1, format_log/2]).
@@ -1391,27 +1391,13 @@ spawn_starter(Appl, S, Type) ->
             Reply = {info, {not_running, NotRunning}},
             gen_server:cast(?AC, {application_started, Appl#appl.name, Reply});
         false ->
-            spawn_link(?MODULE, init_starter, [Appl#appl.appl_data, Type])
+            application_master:start_link(Appl#appl.appl_data, Type)
     end.
 
-init_starter(ApplData, Type) ->
-    process_flag(trap_exit, true),
-    AppName = ApplData#appl_data.name,
-    gen_server:cast(?AC, {application_started, AppName,
-			  catch start_appl(ApplData, Type)}).
-
 reply(undefined, _Reply) ->
     ok;
 reply(From, Reply) -> gen_server:reply(From, Reply).
 
-start_appl(ApplData, Type) ->
-    case application_master:start_link(ApplData, Type) of
-        {ok, _Pid} = Ok ->
-            Ok;
-        {error, _Reason} = Error ->
-            throw(Error)
-    end.
-
 find_missing_dependency(Appl, Applications) ->
     Pred = fun(AppName) -> not lists:keymember(AppName, 1, Applications) end,
     lists:search(Pred, Appl#appl.apps -- Appl#appl.opt_apps).
diff --git a/lib/kernel/src/application_master.erl b/lib/kernel/src/application_master.erl
index fa8fed6d28..4daa9d453c 100644
--- a/lib/kernel/src/application_master.erl
+++ b/lib/kernel/src/application_master.erl
@@ -24,7 +24,7 @@
 -export([get_child/1]).
 
 %% Internal exports
--export([init/4, start_it/4]).
+-export([init/3, start_it/4]).
 
 -include("application_master.hrl").
 
@@ -39,9 +39,8 @@
 %% Returns: {ok, Pid} | {error, Reason} (Pid is unregistered)
 %%-----------------------------------------------------------------
 start_link(ApplData, Type) ->
-    Parent = whereis(application_controller),
     proc_lib:start_link(application_master, init,
-			[Parent, self(), ApplData, Type]).
+			[self(), ApplData, Type]).
 
 start_type() ->
     group_leader() ! {start_type, self()},
@@ -114,8 +113,9 @@ call(AppMaster, Req) ->
 %%%-----------------------------------------------------------------
 %%% Internal functions
 %%%-----------------------------------------------------------------
-init(Parent, Starter, ApplData, Type) ->
-    link(Parent),
+init(Parent, ApplData, Type) ->
+    %% Unblock the parent process as soon as possible
+    proc_lib:init_ack(Parent, {ok, self()}),
     process_flag(trap_exit, true),
     OldGleader =
         case group_leader() == whereis(init) of
@@ -135,12 +135,13 @@ init(Parent, Starter, ApplData, Type) ->
     case start_it(State, Type) of
 	{ok, Pid} ->          % apply(M,F,A) returned ok
 	    ok = set_timer(ApplData#appl_data.maxT),
-	    unlink(Starter),
-	    proc_lib:init_ack(Starter, {ok,self()}),
+	    gen_server:cast(Parent, {application_started, Name, {ok, self()}}),
 	    main_loop(Parent, State#state{child = Pid});
 	{error, Reason} ->    % apply(M,F,A) returned error
+	    gen_server:cast(Parent, {application_started, Name, {error, Reason}}),
 	    exit(Reason);
 	Else ->               % apply(M,F,A) returned erroneous
+	    gen_server:cast(Parent, {application_started, Name, {error, Else}}),
 	    exit(Else)
     end.
 
-- 
2.35.3

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File 4586-Remove-intermediate-starter-process.patch of Package erlang (Revision 54461a2357af3de1f765489d2fd0ee14)

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