]).
-export(
- [ of_pid/1
+ [ of_pid/2
, get_best_known_origin/1
, print/1
]).
%% Public API
%% ============================================================================
--spec of_pid(pid()) ->
- t().
-of_pid(Pid) ->
- Dict = pid_info_exn(Pid, dictionary),
- Ancestry =
- #beam_stats_process_ancestry
- { raw_initial_call = pid_info_exn(Pid, initial_call)
- , otp_initial_call = hope_kv_list:get(Dict, '$initial_call')
- , otp_ancestors = hope_kv_list:get(Dict, '$ancestors')
- },
- ?T
- { pid = Pid
- , registered_name = pid_info_opt(Pid, registered_name)
- , ancestry = Ancestry
- , status = pid_info_exn(Pid, status)
- , memory = pid_info_exn(Pid, memory)
- , total_heap_size = pid_info_exn(Pid, total_heap_size)
- , stack_size = pid_info_exn(Pid, stack_size)
- , message_queue_len = pid_info_exn(Pid, message_queue_len)
- }.
+-spec of_pid(pid(), beam_stats_delta:t()) ->
+ none % when process is dead
+ | {some, t()} % when process is alive
+ .
+of_pid(Pid, DeltasServer) ->
+ try
+ Dict = pid_info_exn(Pid, dictionary),
+ Ancestry =
+ #beam_stats_process_ancestry
+ { raw_initial_call = pid_info_exn(Pid, initial_call)
+ , otp_initial_call = hope_kv_list:get(Dict, '$initial_call')
+ , otp_ancestors = hope_kv_list:get(Dict, '$ancestors')
+ },
+ T =
+ ?T
+ { pid = Pid
+ , registered_name = pid_info_opt(Pid, registered_name)
+ , ancestry = Ancestry
+ , status = pid_info_exn(Pid, status)
+ , memory = pid_info_exn(Pid, memory)
+ , total_heap_size = pid_info_exn(Pid, total_heap_size)
+ , stack_size = pid_info_exn(Pid, stack_size)
+ , message_queue_len = pid_info_exn(Pid, message_queue_len)
+ , reductions = pid_info_reductions(Pid, DeltasServer)
+ },
+ {some, T}
+ catch throw:{process_dead, _} ->
+ none
+ end.
-spec print(t()) ->
ok.
, total_heap_size = TotalHeapSize
, stack_size = StackSize
, message_queue_len = MsgQueueLen
+ , reductions = Reductions
}=T
) ->
BestKnownOrigin = get_best_known_origin(T),
"TotalHeapSize : ~p~n"
"StackSize : ~p~n"
"MsgQueueLen : ~p~n"
+ "Reductions : ~p~n"
"~n",
[ Pid
, BestKnownOrigin
, TotalHeapSize
, StackSize
, MsgQueueLen
+ , Reductions
]
).
%% Private helpers
%% ============================================================================
+-spec pid_info_reductions(pid(), beam_stats_delta:t()) ->
+ non_neg_integer().
+pid_info_reductions(Pid, DeltasServer) ->
+ case beam_stats_delta:of_process_info_reductions(DeltasServer, Pid)
+ of {some, Reductions} ->
+ Reductions
+ ; none ->
+ throw({process_dead, Pid})
+ end.
+
pid_info_exn(Pid, Key) ->
{some, Value} = pid_info_opt(Pid, Key),
Value.
case {Key, beam_stats_source:erlang_process_info(Pid, Key)}
of {registered_name, []} -> none
; {_ , {Key, Value}} -> {some, Value}
+ ; {_ , undefined} -> throw({process_dead, Pid})
end.
%% ============================================================================