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-rw-r--r--lib/tools/src/cover.erl42
1 files changed, 28 insertions, 14 deletions
diff --git a/lib/tools/src/cover.erl b/lib/tools/src/cover.erl
index 8d4561ca9e..62be773fcf 100644
--- a/lib/tools/src/cover.erl
+++ b/lib/tools/src/cover.erl
@@ -169,6 +169,8 @@ start() ->
receive
{?SERVER,started} ->
{ok,Pid};
+ {?SERVER,{error,Error}} ->
+ {error,Error};
{'DOWN', Ref, _Type, _Object, Info} ->
{error,Info}
end,
@@ -630,21 +632,33 @@ remote_reply(MainNode,Reply) ->
%%%----------------------------------------------------------------------
init_main(Starter) ->
- register(?SERVER,self()),
- %% Having write concurrancy here gives a 40% performance boost
- %% when collect/1 is called.
- ?COVER_TABLE = ets:new(?COVER_TABLE, [set, public, named_table,
- {write_concurrency, true}]),
- ?COVER_CLAUSE_TABLE = ets:new(?COVER_CLAUSE_TABLE, [set, public,
+ try register(?SERVER,self()) of
+ true ->
+ %% Having write concurrancy here gives a 40% performance boost
+ %% when collect/1 is called.
+ ?COVER_TABLE = ets:new(?COVER_TABLE, [set, public, named_table,
+ {write_concurrency, true}]),
+ ?COVER_CLAUSE_TABLE = ets:new(?COVER_CLAUSE_TABLE, [set, public,
+ named_table]),
+ ?BINARY_TABLE = ets:new(?BINARY_TABLE, [set, public, named_table]),
+ ?COLLECTION_TABLE = ets:new(?COLLECTION_TABLE, [set, public,
named_table]),
- ?BINARY_TABLE = ets:new(?BINARY_TABLE, [set, public, named_table]),
- ?COLLECTION_TABLE = ets:new(?COLLECTION_TABLE, [set, public,
- named_table]),
- ?COLLECTION_CLAUSE_TABLE = ets:new(?COLLECTION_CLAUSE_TABLE, [set, public,
- named_table]),
- ok = net_kernel:monitor_nodes(true),
- Starter ! {?SERVER,started},
- main_process_loop(#main_state{}).
+ ?COLLECTION_CLAUSE_TABLE = ets:new(?COLLECTION_CLAUSE_TABLE,
+ [set, public, named_table]),
+ ok = net_kernel:monitor_nodes(true),
+ Starter ! {?SERVER,started},
+ main_process_loop(#main_state{})
+ catch
+ error:badarg ->
+ %% The server's already registered; either report that it's already
+ %% started or try again if it died before we could find its pid.
+ case whereis(?SERVER) of
+ undefined ->
+ init_main(Starter);
+ Pid ->
+ Starter ! {?SERVER, {error, {already_started, Pid}}}
+ end
+ end.
main_process_loop(State) ->
receive