[英]Elixir/Erlang - Trace when a message arrives in the mailbox
相当直接的问题,是否可以跟踪到达Process
/ GenServer
(邮箱)的消息? 要知道可以在处理消息后立即跟踪消息(从邮箱中取出),但我似乎无法找到一种方法来挂钩消息的实际到达。
在 erlang 中,您在dbg:p/2中有标志, s
用于发送, r
用于接收:
1> dbg:tracer().
{ok,<0.82.0>}
2> dbg:p(self(), r).
(<0.80.0>) << {dbg,{ok,[{matched,nonode@nohost,1}]}}
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.183997>,319}
{ok,[{matched,nonode@nohost,1}]}
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.184000>,
[{expand_fun,#Fun<group.0.82824323>},
{echo,true},
{binary,false},
{encoding,latin1}]}
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.184002>,ok}
3> self() ! trace_me.
(<0.80.0>) << {shell_cmd,<0.73.0>,
{eval,[{op,{1,8},
'!',
{call,{1,1},{atom,{1,1},self},[]},
{atom,{1,10},trace_me}}]},
cmd}
(<0.80.0>) << trace_me
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.184006>,319}
trace_me
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.184008>,
[{expand_fun,#Fun<group.0.82824323>},
{echo,true},
{binary,false},
{encoding,latin1}]}
(<0.80.0>) << {io_reply,#Ref<0.2586582558.1779957764.184011>,ok}
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