File 0749-GH-4396-exported-function-instead-of-fun-to-set-up-r.patch of Package erlang
From 9d74726bee1c8ec498068e1467ae6392b9999b76 Mon Sep 17 00:00:00 2001
From: Kjell Winblad <kjellwinblad@gmail.com>
Date: Mon, 3 May 2021 09:57:36 +0200
Subject: [PATCH] GH-4396: exported function instead of fun to set up remote
tracing
The function `dbg:n/1` used a local fun to set up a tracer on a remote
node. This works fine as long as the remote node is running exactly
the same version of Erlang/OTP but does not work at all
otherwise. This is fixed by exporting the relevant function
(`dbg:do_relay/2`) and by calling this function on the remote node to
set up remote tracing.
---
lib/runtime_tools/src/dbg.erl | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/lib/runtime_tools/src/dbg.erl b/lib/runtime_tools/src/dbg.erl
index 92938ed5c1..41410bebf0 100644
--- a/lib/runtime_tools/src/dbg.erl
+++ b/lib/runtime_tools/src/dbg.erl
@@ -34,7 +34,7 @@
-export([fun2ms/1]).
%% Local exports
--export([erlang_trace/3,get_info/0,deliver_and_flush/1]).
+-export([erlang_trace/3,get_info/0,deliver_and_flush/1,do_relay/2]).
%% Debug exports
-export([wrap_presort/2, wrap_sort/2, wrap_postsort/1, wrap_sortfix/2,
@@ -942,9 +942,9 @@ erlang_trace(AtomPid, How, Flags) ->
relay(Node,To) when Node /= node() ->
case get(Node) of
- undefined ->
+ undefined ->
S = self(),
- Pid = spawn_link(Node, fun() -> do_relay(S,To) end),
+ Pid = spawn_link(Node, dbg, do_relay, [S, To]),
receive {started,Remote} -> put(Node, {Pid,Remote}) end,
{ok,Pid};
{_Relay,PortOrPid} ->
--
2.26.2
