diff options
Diffstat (limited to 'lib/runtime_tools/src/dbg.erl')
| -rw-r--r-- | lib/runtime_tools/src/dbg.erl | 79 |
1 files changed, 40 insertions, 39 deletions
diff --git a/lib/runtime_tools/src/dbg.erl b/lib/runtime_tools/src/dbg.erl index 186563ab74..d2a7d734c1 100644 --- a/lib/runtime_tools/src/dbg.erl +++ b/lib/runtime_tools/src/dbg.erl @@ -3,16 +3,17 @@ %% %% Copyright Ericsson AB 1996-2013. All Rights Reserved. %% -%% The contents of this file are subject to the Erlang Public License, -%% Version 1.1, (the "License"); you may not use this file except in -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved online at http://www.erlang.org/. +%% Licensed under the Apache License, Version 2.0 (the "License"); +%% you may not use this file except in compliance with the License. +%% You may obtain a copy of the License at %% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. +%% http://www.apache.org/licenses/LICENSE-2.0 +%% +%% Unless required by applicable law or agreed to in writing, software +%% distributed under the License is distributed on an "AS IS" BASIS, +%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +%% See the License for the specific language governing permissions and +%% limitations under the License. %% %% %CopyrightEnd% %% @@ -778,50 +779,50 @@ tracer_init(Handler, HandlerData) -> tracer_loop(Handler, HandlerData). tracer_loop(Handler, Hdata) -> - receive - Msg -> - %% Don't match in receive to avoid giving EXIT message higher - %% priority than the trace messages. - case Msg of - {'EXIT',_Pid,_Reason} -> - ok; - Trace -> - NewData = recv_all_traces(Trace, Handler, Hdata), - tracer_loop(Handler, NewData) - end + {State, Suspended, Traces} = recv_all_traces(), + NewHdata = handle_traces(Suspended, Traces, Handler, Hdata), + case State of + done -> + exit(normal); + loop -> + tracer_loop(Handler, NewHdata) end. - -recv_all_traces(Trace, Handler, Hdata) -> - Suspended = suspend(Trace, []), - recv_all_traces(Suspended, Handler, Hdata, [Trace]). -recv_all_traces(Suspended0, Handler, Hdata, Traces) -> +recv_all_traces() -> + recv_all_traces([], [], infinity). + +recv_all_traces(Suspended0, Traces, Timeout) -> receive Trace when is_tuple(Trace), element(1, Trace) == trace -> Suspended = suspend(Trace, Suspended0), - recv_all_traces(Suspended, Handler, Hdata, [Trace|Traces]); + recv_all_traces(Suspended, [Trace|Traces], 0); Trace when is_tuple(Trace), element(1, Trace) == trace_ts -> Suspended = suspend(Trace, Suspended0), - recv_all_traces(Suspended, Handler, Hdata, [Trace|Traces]); + recv_all_traces(Suspended, [Trace|Traces], 0); Trace when is_tuple(Trace), element(1, Trace) == seq_trace -> Suspended = suspend(Trace, Suspended0), - recv_all_traces(Suspended, Handler, Hdata, [Trace|Traces]); + recv_all_traces(Suspended, [Trace|Traces], 0); Trace when is_tuple(Trace), element(1, Trace) == drop -> Suspended = suspend(Trace, Suspended0), - recv_all_traces(Suspended, Handler, Hdata, [Trace|Traces]); + recv_all_traces(Suspended, [Trace|Traces], 0); + {'EXIT', _Pid, _Reason} -> + {done, Suspended0, Traces}; Other -> %%% Is this really a good idea? io:format(user,"** tracer received garbage: ~p~n", [Other]), - recv_all_traces(Suspended0, Handler, Hdata, Traces) - after 0 -> - case catch invoke_handler(Traces, Handler, Hdata) of - {'EXIT',Reason} -> - resume(Suspended0), - exit({trace_handler_crashed,Reason}); - NewHdata -> - resume(Suspended0), - NewHdata - end + recv_all_traces(Suspended0, Traces, Timeout) + after Timeout -> + {loop, Suspended0, Traces} + end. + +handle_traces(Suspended, Traces, Handler, Hdata) -> + case catch invoke_handler(Traces, Handler, Hdata) of + {'EXIT',Reason} -> + resume(Suspended), + exit({trace_handler_crashed,Reason}); + NewHdata -> + resume(Suspended), + NewHdata end. invoke_handler([Tr|Traces], Handler, Hdata0) -> |