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-rw-r--r--erts/preloaded/src/init.erl643
1 files changed, 333 insertions, 310 deletions
diff --git a/erts/preloaded/src/init.erl b/erts/preloaded/src/init.erl
index 61d8df2428..45468b3b9c 100644
--- a/erts/preloaded/src/init.erl
+++ b/erts/preloaded/src/init.erl
@@ -1,18 +1,19 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1996-2013. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2016. 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%
%%
@@ -22,7 +23,6 @@
%% a local file or distributed from another erlang node.
%%
%% Flags:
-%% -id Identity : identity of the system.
%% -boot File : Absolute file name of the boot script.
%% -boot_var Var Value
%% : $Var in the boot script is expanded to
@@ -41,6 +41,7 @@
%% -s : Start own processes.
%%
%% Experimental flags:
+%% -profile_boot : Use an 'eprof light' to profile boot sequence
%% -init_debug : Activate debug printouts in init
%% -loader_debug : Activate debug printouts in erl_prim_loader
%% -code_path_choice : strict | relaxed
@@ -74,8 +75,22 @@
subscribed = []}).
-type state() :: #state{}.
+%% Data for eval_script/2.
+-record(es,
+ {init,
+ debug,
+ path,
+ pa,
+ pz,
+ path_choice,
+ prim_load,
+ load_mode,
+ vars
+ }).
+
-define(ON_LOAD_HANDLER, init__boot__on_load_handler).
+
debug(false, _) -> ok;
debug(_, T) -> erlang:display(T).
@@ -116,7 +131,7 @@ bs2ss(L) ->
get_status() ->
request(get_status).
--spec fetch_loaded() -> [atom()].
+-spec fetch_loaded() -> [{module(),file:filename()}].
fetch_loaded() ->
request(fetch_loaded).
@@ -159,18 +174,43 @@ stop() -> init ! {stop,stop}, ok.
-spec stop(Status) -> 'ok' when
Status :: non_neg_integer() | string().
-stop(Status) -> init ! {stop,{stop,Status}}, ok.
+stop(Status) when is_integer(Status), Status >= 0 ->
+ stop_1(Status);
+stop(Status) when is_list(Status) ->
+ case is_bytelist(Status) of
+ true ->
+ stop_1(Status);
+ false ->
+ erlang:error(badarg)
+ end;
+stop(_) ->
+ erlang:error(badarg).
+
+is_bytelist([B|Bs]) when is_integer(B), B >= 0, B < 256 -> is_bytelist(Bs);
+is_bytelist([]) -> true;
+is_bytelist(_) -> false.
+
+%% Note that we check the type of Status beforehand to ensure that
+%% the call to halt(Status) by the init process cannot fail
+stop_1(Status) -> init ! {stop,{stop,Status}}, ok.
-spec boot(BootArgs) -> no_return() when
BootArgs :: [binary()].
boot(BootArgs) ->
register(init, self()),
process_flag(trap_exit, true),
- start_on_load_handler_process(),
+
+ %% Load the tracer nif
+ erl_tracer:on_load(),
+
{Start0,Flags,Args} = parse_boot_args(BootArgs),
+ %% We don't get to profile parsing of BootArgs
+ case get_flag(profile_boot, Flags, false) of
+ false -> ok;
+ true -> debug_profile_start()
+ end,
Start = map(fun prepare_run_args/1, Start0),
- Flags0 = flags_to_atoms_again(Flags),
- boot(Start,Flags0,Args).
+ boot(Start, Flags, Args).
prepare_run_args({eval, [Expr]}) ->
{eval,Expr};
@@ -202,16 +242,6 @@ map(_F, []) ->
map(F, [X|Rest]) ->
[F(X) | map(F, Rest)].
-flags_to_atoms_again([]) ->
- [];
-flags_to_atoms_again([{F0,L0}|Rest]) ->
- L = L0,
- F = b2a(F0),
- [{F,L}|flags_to_atoms_again(Rest)];
-flags_to_atoms_again([{F0}|Rest]) ->
- F = b2a(F0),
- [{F}|flags_to_atoms_again(Rest)].
-
-spec code_path_choice() -> 'relaxed' | 'strict'.
code_path_choice() ->
case get_argument(code_path_choice) of
@@ -224,6 +254,7 @@ code_path_choice() ->
end.
boot(Start,Flags,Args) ->
+ start_on_load_handler_process(),
BootPid = do_boot(Flags,Start),
State = #state{flags = Flags,
args = Args,
@@ -273,21 +304,13 @@ things_to_string([]) ->
"".
halt_string(String, List) ->
- HaltString = String ++ things_to_string(List),
- if
- length(HaltString)<199 -> HaltString;
- true -> first198(HaltString, 198)
- end.
-
-first198([H|T], N) when N>0 ->
- [H|first198(T, N-1)];
-first198(_, 0) ->
- [].
+ String ++ things_to_string(List).
%% String = string()
%% List = [string() | atom() | pid() | number()]
%% Any other items in List, such as tuples, are ignored when creating
%% the string used as argument to erlang:halt/1.
+-spec crash(_, _) -> no_return().
crash(String, List) ->
halt(halt_string(String, List)).
@@ -295,9 +318,9 @@ crash(String, List) ->
-spec boot_loop(pid(), state()) -> no_return().
boot_loop(BootPid, State) ->
receive
- {BootPid,loaded,ModLoaded} ->
- Loaded = State#state.loaded,
- boot_loop(BootPid,State#state{loaded = [ModLoaded|Loaded]});
+ {BootPid,loaded,NewlyLoaded} ->
+ Loaded = NewlyLoaded ++ State#state.loaded,
+ boot_loop(BootPid, State#state{loaded = Loaded});
{BootPid,started,KernelPid} ->
boot_loop(BootPid, new_kernelpid(KernelPid, BootPid, State));
{BootPid,progress,started} ->
@@ -336,12 +359,25 @@ boot_loop(BootPid, State) ->
end.
ensure_loaded(Module, Loaded) ->
- File = concat([Module,objfile_extension()]),
- case catch load_mod(Module,File) of
- {ok, FullName} ->
- {{module, Module}, [{Module, FullName}|Loaded]};
- Res ->
- {Res, Loaded}
+ case erlang:module_loaded(Module) of
+ true ->
+ {{module, Module}, Loaded};
+ false ->
+ do_ensure_loaded(Module, Loaded)
+ end.
+
+do_ensure_loaded(Module, Loaded) ->
+ File = atom_to_list(Module) ++ objfile_extension(),
+ case erl_prim_loader:get_file(File) of
+ {ok,BinCode,FullName} ->
+ case do_load_module(Module, BinCode) of
+ ok ->
+ {{module, Module}, [{Module, FullName}|Loaded]};
+ error ->
+ {error, [{Module, FullName}|Loaded]}
+ end;
+ Error ->
+ {Error, Loaded}
end.
%% Tell subscribed processes the system has started.
@@ -450,9 +486,9 @@ do_handle_msg(Msg,State) ->
%%% -------------------------------------------------
make_permanent(Boot,Config,Flags0,State) ->
- case set_flag('-boot',Boot,Flags0) of
+ case set_flag(boot, Boot, Flags0) of
{ok,Flags1} ->
- case set_flag('-config',Config,Flags1) of
+ case set_flag(config, Config, Flags1) of
{ok,Flags} ->
{ok,State#state{flags = Flags}};
Error ->
@@ -465,7 +501,10 @@ make_permanent(Boot,Config,Flags0,State) ->
set_flag(_Flag,false,Flags) ->
{ok,Flags};
set_flag(Flag,Value,Flags) when is_list(Value) ->
- case catch list_to_binary(Value) of
+ %% The flag here can be -boot or -config, which means the value is
+ %% a file name! Thus the file name encoding is used when coverting.
+ Encoding = file:native_name_encoding(),
+ case catch unicode:characters_to_binary(Value,Encoding,Encoding) of
{'EXIT',_} ->
{error,badarg};
AValue ->
@@ -588,12 +627,9 @@ kill_all_pids(Heart) ->
kill_all_pids(Heart) % Continue until all are really killed.
end.
-%% All except zombies.
-alive_processes() ->
- [P || P <- processes(), erlang:is_process_alive(P)].
-
+%% All except system processes.
get_pids(Heart) ->
- Pids = alive_processes(),
+ Pids = [P || P <- processes(), not erts_internal:is_system_process(P)],
delete(Heart,self(),Pids).
delete(Heart,Init,[Heart|Pids]) -> delete(Heart,Init,Pids);
@@ -634,9 +670,9 @@ unload(_) ->
do_unload(sub([heart|erlang:pre_loaded()],erlang:loaded())).
do_unload([M|Mods]) ->
- catch erlang:purge_module(M),
+ catch erts_internal:purge_module(M),
catch erlang:delete_module(M),
- catch erlang:purge_module(M),
+ catch erts_internal:purge_module(M),
do_unload(Mods);
do_unload([]) ->
purge_all_hipe_refs(),
@@ -690,17 +726,15 @@ sleep(T) -> receive after T -> ok end.
%%% The loader shall run for ever!
%%% -------------------------------------------------
-start_prim_loader(Init,Id,Pgm,Nodes,Path,{Pa,Pz}) ->
- case erl_prim_loader:start(Id,Pgm,Nodes) of
- {ok,Pid} when Path =:= false ->
- InitPath = append(Pa,["."|Pz]),
- erl_prim_loader:set_path(InitPath),
- add_to_kernel(Init,Pid),
- Pid;
+start_prim_loader(Init, Path0, {Pa,Pz}) ->
+ Path = case Path0 of
+ false -> Pa ++ ["."|Pz];
+ _ -> Path0
+ end,
+ case erl_prim_loader:start() of
{ok,Pid} ->
erl_prim_loader:set_path(Path),
- add_to_kernel(Init,Pid),
- Pid;
+ add_to_kernel(Init, Pid);
{error,Reason} ->
erlang:display({"cannot start loader",Reason}),
exit(Reason)
@@ -714,13 +748,6 @@ add_to_kernel(Init,Pid) ->
ok
end.
-prim_load_flags(Flags) ->
- PortPgm = get_flag('-loader',Flags,<<"efile">>),
- Hosts = get_flag_list('-hosts', Flags, []),
- Id = get_flag('-id',Flags,none),
- Path = get_flag_list('-path',Flags,false),
- {PortPgm, Hosts, Id, Path}.
-
%%% -------------------------------------------------
%%% The boot process fetches a boot script and loads
%%% all modules specified and starts spec. processes.
@@ -733,46 +760,74 @@ do_boot(Flags,Start) ->
do_boot(Init,Flags,Start) ->
process_flag(trap_exit,true),
- {Pgm0,Nodes,Id,Path} = prim_load_flags(Flags),
- Root = b2s(get_flag('-root',Flags)),
- PathFls = path_flags(Flags),
- Pgm = b2s(Pgm0),
- _Pid = start_prim_loader(Init,b2a(Id),Pgm,bs2as(Nodes),
- bs2ss(Path),PathFls),
+ Root = get_root(Flags),
+ Path = get_flag_list(path, Flags, false),
+ {Pa,Pz} = PathFls = path_flags(Flags),
+ start_prim_loader(Init, bs2ss(Path), PathFls),
BootFile = bootfile(Flags,Root),
BootList = get_boot(BootFile,Root),
- LoadMode = b2a(get_flag('-mode',Flags,false)),
- Deb = b2a(get_flag('-init_debug',Flags,false)),
+ LoadMode = b2a(get_flag(mode, Flags, false)),
+ Deb = b2a(get_flag(init_debug, Flags, false)),
catch ?ON_LOAD_HANDLER ! {init_debug_flag,Deb},
- BootVars = get_flag_args('-boot_var',Flags),
- ParallelLoad =
- (Pgm =:= "efile") and (erlang:system_info(thread_pool_size) > 0),
+ BootVars = get_boot_vars(Root, Flags),
PathChoice = code_path_choice(),
- eval_script(BootList,Init,PathFls,{Root,BootVars},Path,
- {true,LoadMode,ParallelLoad},Deb,PathChoice),
+ Es = #es{init=Init,debug=Deb,path=Path,pa=Pa,pz=Pz,
+ path_choice=PathChoice,
+ prim_load=true,load_mode=LoadMode,
+ vars=BootVars},
+ eval_script(BootList, Es),
%% To help identifying Purify windows that pop up,
%% print the node name into the Purify log.
(catch erlang:system_info({purify, "Node: " ++ atom_to_list(node())})),
- start_em(Start).
+ start_em(Start),
+ case get_flag(profile_boot,Flags,false) of
+ false -> ok;
+ true ->
+ debug_profile_format_mfas(debug_profile_mfas()),
+ debug_profile_stop()
+ end,
+ ok.
+
+get_root(Flags) ->
+ case get_argument(root, Flags) of
+ {ok,[[Root]]} ->
+ Root;
+ _ ->
+ exit(no_or_multiple_root_variables)
+ end.
+
+get_boot_vars(Root, Flags) ->
+ BootVars = get_boot_vars_1(#{}, Flags),
+ RootKey = <<"ROOT">>,
+ BootVars#{RootKey=>Root}.
+
+get_boot_vars_1(Vars, [{boot_var,[Key,Value]}|T]) ->
+ get_boot_vars_1(Vars#{Key=>Value}, T);
+get_boot_vars_1(_, [{boot_var,_}|_]) ->
+ exit(invalid_boot_var_argument);
+get_boot_vars_1(Vars, [_|T]) ->
+ get_boot_vars_1(Vars, T);
+get_boot_vars_1(Vars, []) ->
+ Vars.
bootfile(Flags,Root) ->
- b2s(get_flag('-boot',Flags,concat([Root,"/bin/start"]))).
+ b2s(get_flag(boot, Flags, Root++"/bin/start")).
path_flags(Flags) ->
- Pa = append(reverse(get_flag_args('-pa',Flags))),
- Pz = append(get_flag_args('-pz',Flags)),
+ Pa = append(reverse(get_flag_args(pa, Flags))),
+ Pz = append(get_flag_args(pz, Flags)),
{bs2ss(Pa),bs2ss(Pz)}.
get_boot(BootFile0,Root) ->
- BootFile = concat([BootFile0,".boot"]),
+ BootFile = BootFile0 ++ ".boot",
case get_boot(BootFile) of
{ok, CmdList} ->
CmdList;
not_found -> %% Check for default.
- BootF = concat([Root,"/bin/",BootFile]),
+ BootF = Root ++ "/bin/" ++ BootFile,
case get_boot(BootF) of
{ok, CmdList} ->
CmdList;
@@ -806,91 +861,88 @@ get_boot(BootFile) ->
%% boot process hangs (we want to ensure syncronicity).
%%
-eval_script([{progress,Info}|CfgL],Init,PathFs,Vars,P,Ph,Deb,PathChoice) ->
- debug(Deb,{progress,Info}),
+eval_script([{progress,Info}=Progress|T], #es{debug=Deb}=Es) ->
+ debug(Deb, Progress),
init ! {self(),progress,Info},
- eval_script(CfgL,Init,PathFs,Vars,P,Ph,Deb,PathChoice);
-eval_script([{preLoaded,_}|CfgL],Init,PathFs,Vars,P,Ph,Deb,PathChoice) ->
- eval_script(CfgL,Init,PathFs,Vars,P,Ph,Deb,PathChoice);
-eval_script([{path,Path}|CfgL],Init,{Pa,Pz},Vars,false,Ph,Deb,PathChoice) ->
+ eval_script(T, Es);
+eval_script([{preLoaded,_}|T], #es{}=Es) ->
+ eval_script(T, Es);
+eval_script([{path,Path}|T], #es{path=false,pa=Pa,pz=Pz,
+ path_choice=PathChoice,
+ vars=Vars}=Es) ->
RealPath0 = make_path(Pa, Pz, Path, Vars),
RealPath = patch_path(RealPath0, PathChoice),
erl_prim_loader:set_path(RealPath),
- eval_script(CfgL,Init,{Pa,Pz},Vars,false,Ph,Deb,PathChoice);
-eval_script([{path,_}|CfgL],Init,PathFs,Vars,P,Ph,Deb,PathChoice) ->
+ eval_script(T, Es);
+eval_script([{path,_}|T], #es{}=Es) ->
%% Ignore, use the command line -path flag.
- eval_script(CfgL,Init,PathFs,Vars,P,Ph,Deb,PathChoice);
-eval_script([{kernel_load_completed}|CfgL],Init,PathFs,Vars,P,{_,embedded,Par},Deb,PathChoice) ->
- eval_script(CfgL,Init,PathFs,Vars,P,{true,embedded,Par},Deb,PathChoice);
-eval_script([{kernel_load_completed}|CfgL],Init,PathFs,Vars,P,{_,E,Par},Deb,PathChoice) ->
- eval_script(CfgL,Init,PathFs,Vars,P,{false,E,Par},Deb,PathChoice);
-eval_script([{primLoad,Mods}|CfgL],Init,PathFs,Vars,P,{true,E,Par},Deb,PathChoice)
+ eval_script(T, Es);
+eval_script([{kernel_load_completed}|T], #es{load_mode=Mode}=Es0) ->
+ Es = case Mode of
+ embedded -> Es0;
+ _ -> Es0#es{prim_load=false}
+ end,
+ eval_script(T, Es);
+eval_script([{primLoad,Mods}|T], #es{init=Init,prim_load=PrimLoad}=Es)
when is_list(Mods) ->
- if
- Par =:= true ->
- par_load_modules(Mods,Init);
+ case PrimLoad of
true ->
- load_modules(Mods)
+ load_modules(Mods, Init);
+ false ->
+ %% Do not load now, code_server does that dynamically!
+ ok
end,
- eval_script(CfgL,Init,PathFs,Vars,P,{true,E,Par},Deb,PathChoice);
-eval_script([{primLoad,_Mods}|CfgL],Init,PathFs,Vars,P,{false,E,Par},Deb,PathChoice) ->
- %% Do not load now, code_server does that dynamically!
- eval_script(CfgL,Init,PathFs,Vars,P,{false,E,Par},Deb,PathChoice);
-eval_script([{kernelProcess,Server,{Mod,Fun,Args}}|CfgL],Init,
- PathFs,Vars,P,Ph,Deb,PathChoice) ->
- debug(Deb,{start,Server}),
- start_in_kernel(Server,Mod,Fun,Args,Init),
- eval_script(CfgL,Init,PathFs,Vars,P,Ph,Deb,PathChoice);
-eval_script([{apply,{Mod,Fun,Args}}|CfgL],Init,PathFs,Vars,P,Ph,Deb,PathChoice) ->
- debug(Deb,{apply,{Mod,Fun,Args}}),
- apply(Mod,Fun,Args),
- eval_script(CfgL,Init,PathFs,Vars,P,Ph,Deb,PathChoice);
-eval_script([],_,_,_,_,_,_,_) ->
+ eval_script(T, Es);
+eval_script([{kernelProcess,Server,{Mod,Fun,Args}}|T],
+ #es{init=Init,debug=Deb}=Es) ->
+ debug(Deb, {start,Server}),
+ start_in_kernel(Server, Mod, Fun, Args, Init),
+ eval_script(T, Es);
+eval_script([{apply,{Mod,Fun,Args}}=Apply|T], #es{debug=Deb}=Es) ->
+ debug(Deb, Apply),
+ apply(Mod, Fun, Args),
+ eval_script(T, Es);
+eval_script([], #es{}) ->
ok;
-eval_script(What,_,_,_,_,_,_,_) ->
+eval_script(What, #es{}) ->
exit({'unexpected command in bootfile',What}).
-load_modules([Mod|Mods]) ->
- File = concat([Mod,objfile_extension()]),
- {ok,Full} = load_mod(Mod,File),
- init ! {self(),loaded,{Mod,Full}}, %% Tell init about loaded module
- load_modules(Mods);
-load_modules([]) ->
+load_modules(Mods0, Init) ->
+ Mods = [M || M <- Mods0, not erlang:module_loaded(M)],
+ F = prepare_loading_fun(),
+ case erl_prim_loader:get_modules(Mods, F) of
+ {ok,{Prep0,[]}} ->
+ Prep = [Code || {_,{prepared,Code,_}} <- Prep0],
+ ok = erlang:finish_loading(Prep),
+ Loaded = [{Mod,Full} || {Mod,{_,_,Full}} <- Prep0],
+ Init ! {self(),loaded,Loaded},
+ Beams = [{M,Beam,Full} || {M,{on_load,Beam,Full}} <- Prep0],
+ load_rest(Beams, Init);
+ {ok,{_,[_|_]=Errors}} ->
+ Ms = [M || {M,_} <- Errors],
+ exit({load_failed,Ms})
+ end.
+
+load_rest([{Mod,Beam,Full}|T], Init) ->
+ do_load_module(Mod, Beam),
+ Init ! {self(),loaded,[{Mod,Full}]},
+ load_rest(T, Init);
+load_rest([], _) ->
ok.
-%%% An optimization: erl_prim_loader gets the chance of loading many
-%%% files in parallel, using threads. This will reduce the seek times,
-%%% and loaded code can be processed while other threads are waiting
-%%% for the disk. The optimization is not tried unless the loader is
-%%% "efile" and there is a non-empty pool of threads.
-%%%
-%%% Many threads are needed to get a good result, so it would be
-%%% beneficial to load several applications in parallel. However,
-%%% measurements show that the file system handles one directory at a
-%%% time, regardless if parallel threads are created for files on
-%%% several directories (a guess: writing the meta information when
-%%% the file was last read ('mtime'), forces the file system to sync
-%%% between directories).
-
-par_load_modules(Mods,Init) ->
- Ext = objfile_extension(),
- ModFiles = [{Mod,concat([Mod,Ext])} || Mod <- Mods,
- not erlang:module_loaded(Mod)],
- Self = self(),
- Fun = fun(Mod, BinCode, FullName) ->
- case catch load_mod_code(Mod, BinCode, FullName) of
- {ok, _} ->
- Init ! {Self,loaded,{Mod,FullName}},
- ok;
- _EXIT ->
- {error, Mod}
- end
- end,
- case erl_prim_loader:get_files(ModFiles, Fun) of
- ok ->
- ok;
- {error,Mod} ->
- exit({'cannot load',Mod,get_files})
+prepare_loading_fun() ->
+ fun(Mod, FullName, Beam) ->
+ case erlang:prepare_loading(Mod, Beam) of
+ Prepared when is_binary(Prepared) ->
+ case erlang:has_prepared_code_on_load(Prepared) of
+ true ->
+ {ok,{on_load,Beam,FullName}};
+ false ->
+ {ok,{prepared,Prepared,FullName}}
+ end;
+ {error,_}=Error ->
+ Error
+ end
end.
make_path(Pa, Pz, Path, Vars) ->
@@ -907,34 +959,25 @@ fix_path([Path|Ps], Vars) ->
fix_path(_, _) ->
[].
-add_var("$ROOT/" ++ Path, {Root,_}) ->
- concat([Root, "/", Path]);
-add_var([$$|Path0], {_,VarList}) ->
- {Var,Path} = extract_var(Path0,[]),
- Value = b2s(get_var_value(list_to_binary(Var),VarList)),
- concat([Value, "/", Path]);
-add_var(Path, _) ->
+add_var("$"++Path0, Vars) ->
+ {Var,Path} = extract_var(Path0, []),
+ Key = list_to_binary(Var),
+ case Vars of
+ #{Key:=Value0} ->
+ Value = b2s(Value0),
+ Value ++ "/" ++ Path;
+ _ ->
+ Error0 = "cannot expand $" ++ Var ++ " in bootfile",
+ Error = list_to_atom(Error0),
+ exit(Error)
+ end;
+add_var(Path, _) ->
Path.
extract_var([$/|Path],Var) -> {reverse(Var),Path};
extract_var([H|T],Var) -> extract_var(T,[H|Var]);
extract_var([],Var) -> {reverse(Var),[]}.
-%% get_var_value(Var, [Vars]) where Vars == [atom()]
-get_var_value(Var,[Vars|VarList]) ->
- case get_var_val(Var,Vars) of
- {ok, Value} ->
- Value;
- _ ->
- get_var_value(Var,VarList)
- end;
-get_var_value(Var,[]) ->
- exit(list_to_atom(concat(["cannot expand \$", Var, " in bootfile"]))).
-
-get_var_val(Var,[Var,Value|_]) -> {ok, Value};
-get_var_val(Var,[_,_|Vars]) -> get_var_val(Var,Vars);
-get_var_val(_,_) -> false.
-
patch_path(Dirs, strict) ->
Dirs;
patch_path(Dirs, relaxed) ->
@@ -1038,59 +1081,33 @@ start_em([]) -> ok.
start_it([]) ->
ok;
start_it({eval,Bin}) ->
- Str = binary_to_list(Bin),
+ Str = b2s(Bin),
{ok,Ts,_} = erl_scan:string(Str),
Ts1 = case reverse(Ts) of
[{dot,_}|_] -> Ts;
TsR -> reverse([{dot,1} | TsR])
end,
{ok,Expr} = erl_parse:parse_exprs(Ts1),
- erl_eval:exprs(Expr, erl_eval:new_bindings()),
+ {value, _Value, _Bs} = erl_eval:exprs(Expr, erl_eval:new_bindings()),
ok;
start_it([_|_]=MFA) ->
- Ref = make_ref(),
- case catch {Ref,case MFA of
- [M] -> M:start();
- [M,F] -> M:F();
- [M,F|Args] -> M:F(Args) % Args is a list
- end} of
- {Ref,R} ->
- R;
- {'EXIT',Reason} ->
- exit(Reason);
- Other ->
- throw(Other)
+ case MFA of
+ [M] -> M:start();
+ [M,F] -> M:F();
+ [M,F|Args] -> M:F(Args) % Args is a list
end.
-%%
-%% Fetch a module and load it into the system.
-%%
-load_mod(Mod, File) ->
- case erlang:module_loaded(Mod) of
- false ->
- case erl_prim_loader:get_file(File) of
- {ok,BinCode,FullName} ->
- load_mod_code(Mod, BinCode, FullName);
- _ ->
- exit({'cannot load',Mod,get_file})
- end;
- _ -> % Already loaded.
- {ok,File}
- end.
+%% Load a module.
-load_mod_code(Mod, BinCode, FullName) ->
- case erlang:module_loaded(Mod) of
- false ->
- case erlang:load_module(Mod, BinCode) of
- {module,Mod} -> {ok,FullName};
- {error,on_load} ->
- ?ON_LOAD_HANDLER ! {loaded,Mod},
- {ok,FullName};
- Other ->
- exit({'cannot load',Mod,Other})
- end;
- _ -> % Already loaded.
- {ok,FullName}
+do_load_module(Mod, BinCode) ->
+ case erlang:load_module(Mod, BinCode) of
+ {module,Mod} ->
+ ok;
+ {error,on_load} ->
+ ?ON_LOAD_HANDLER ! {loaded,Mod},
+ ok;
+ _ ->
+ error
end.
%% --------------------------------------------------------
@@ -1101,7 +1118,7 @@ load_mod_code(Mod, BinCode, FullName) ->
%% --------------------------------------------------------
shutdown_timer(Flags) ->
- case get_flag('-shutdown_time',Flags,infinity) of
+ case get_flag(shutdown_time, Flags, infinity) of
infinity ->
self();
Time ->
@@ -1151,14 +1168,10 @@ parse_boot_args([B|Bs], Ss, Fs, As) ->
eval_arg ->
{Expr,Rest} = get_args(Bs, []),
parse_boot_args(Rest, [{eval, Expr}|Ss], Fs, As);
- flag ->
+ {flag,A} ->
{F,Rest} = get_args(Bs, []),
- Fl = case F of
- [] -> [B];
- FF -> [B,FF]
- end,
- parse_boot_args(Rest, Ss,
- [list_to_tuple(Fl)|Fs], As);
+ Fl = {A,F},
+ parse_boot_args(Rest, Ss, [Fl|Fs], As);
arg ->
parse_boot_args(Bs, Ss, Fs, [B|As]);
end_args ->
@@ -1172,12 +1185,8 @@ check(<<"-s">>) -> start_arg;
check(<<"-run">>) -> start_arg2;
check(<<"-eval">>) -> eval_arg;
check(<<"--">>) -> end_args;
-check(X) when is_binary(X) ->
- case binary_to_list(X) of
- [$-|_Rest] -> flag;
- _Chars -> arg %Even empty atoms
- end;
-check(_X) -> arg. %This should never occur
+check(<<"-",Flag/binary>>) -> {flag,b2a(Flag)};
+check(_) -> arg.
get_args([B|Bs], As) ->
case check(B) of
@@ -1186,7 +1195,7 @@ get_args([B|Bs], As) ->
start_arg2 -> {reverse(As), [B|Bs]};
eval_arg -> {reverse(As), [B|Bs]};
end_args -> {reverse(As), Bs};
- flag -> {reverse(As), [B|Bs]};
+ {flag,_} -> {reverse(As), [B|Bs]};
arg ->
get_args(Bs, [B|As])
end;
@@ -1198,44 +1207,28 @@ get_args([], As) -> {reverse(As),[]}.
%% atom() if a single arg was given.
%% list(atom()) if several args were given.
%%
-get_flag(F,Flags,Default) ->
- case catch get_flag(F,Flags) of
- {'EXIT',_} ->
- Default;
- Value ->
- Value
- end.
-
-get_flag(F,Flags) ->
- case search(F,Flags) of
- {value,{F,[V]}} ->
+get_flag(F, Flags, Default) ->
+ case lists:keyfind(F, 1, Flags) of
+ {F,[]} ->
+ true;
+ {F,[V]} ->
V;
- {value,{F,V}} ->
+ {F,V} ->
V;
- {value,{F}} -> % Flag given!
- true;
_ ->
- exit(list_to_atom(concat(["no ",F," flag"])))
+ Default
end.
%%
%% Internal get_flag function, with default value.
%% Return: list(atom())
%%
-get_flag_list(F,Flags,Default) ->
- case catch get_flag_list(F,Flags) of
- {'EXIT',_} ->
- Default;
- Value ->
- Value
- end.
-
-get_flag_list(F,Flags) ->
- case search(F,Flags) of
- {value,{F,V}} ->
+get_flag_list(F, Flags, Default) ->
+ case lists:keyfind(F, 1, Flags) of
+ {F,[_|_]=V} ->
V;
_ ->
- exit(list_to_atom(concat(["no ",F," flag"])))
+ Default
end.
%%
@@ -1245,21 +1238,15 @@ get_flag_list(F,Flags) ->
%%
get_flag_args(F,Flags) -> get_flag_args(F,Flags,[]).
-get_flag_args(F,[{F,V}|Flags],Acc) when is_list(V) ->
- get_flag_args(F,Flags,[V|Acc]);
get_flag_args(F,[{F,V}|Flags],Acc) ->
- get_flag_args(F,Flags,[[V]|Acc]);
+ get_flag_args(F,Flags,[V|Acc]);
get_flag_args(F,[_|Flags],Acc) ->
get_flag_args(F,Flags,Acc);
get_flag_args(_,[],Acc) ->
reverse(Acc).
get_arguments([{F,V}|Flags]) ->
- [$-|Fl] = atom_to_list(F),
- [{list_to_atom(Fl),to_strings(V)}|get_arguments(Flags)];
-get_arguments([{F}|Flags]) ->
- [$-|Fl] = atom_to_list(F),
- [{list_to_atom(Fl),[]}|get_arguments(Flags)];
+ [{F,to_strings(V)}|get_arguments(Flags)];
get_arguments([]) ->
[].
@@ -1267,44 +1254,26 @@ to_strings([H|T]) when is_atom(H) -> [atom_to_list(H)|to_strings(T)];
to_strings([H|T]) when is_binary(H) -> [b2s(H)|to_strings(T)];
to_strings([]) -> [].
-get_argument(Arg,Flags) ->
- Args = get_arguments(Flags),
- case get_argument1(Arg,Args) of
- [] ->
- error;
- Value ->
- {ok,Value}
+get_argument(Arg, Flags) ->
+ case get_argument1(Arg, Flags) of
+ [] -> error;
+ Value -> {ok,Value}
end.
-get_argument1(Arg,[{Arg,V}|Args]) ->
- [V|get_argument1(Arg,Args)];
-get_argument1(Arg,[_|Args]) ->
- get_argument1(Arg,Args);
-get_argument1(_,[]) ->
+get_argument1(Arg, [{Arg,V}|Args]) ->
+ [to_strings(V)|get_argument1(Arg, Args)];
+get_argument1(Arg, [_|Args]) ->
+ get_argument1(Arg, Args);
+get_argument1(_, []) ->
[].
set_argument([{Flag,_}|Flags],Flag,Value) ->
[{Flag,[Value]}|Flags];
-set_argument([{Flag}|Flags],Flag,Value) ->
- [{Flag,[Value]}|Flags];
set_argument([Item|Flags],Flag,Value) ->
[Item|set_argument(Flags,Flag,Value)];
set_argument([],Flag,Value) ->
[{Flag,[Value]}].
-concat([A|T]) when is_atom(A) ->
- atom_to_list(A) ++ concat(T);
-concat([C|T]) when is_integer(C), 0 =< C, C =< 255 ->
- [C|concat(T)];
-concat([Bin|T]) when is_binary(Bin) ->
- binary_to_list(Bin) ++ concat(T);
-concat([S|T]) ->
- S ++ concat(T);
-concat([]) ->
- [].
-
-append(L, Z) -> L ++ Z.
-
append([E]) -> E;
append([H|T]) ->
H ++ append(T);
@@ -1319,13 +1288,6 @@ reverse([A, B]) ->
reverse([A, B | L]) ->
lists:reverse(L, [B, A]). % BIF
-search(Key, [H|_T]) when is_tuple(H), element(1, H) =:= Key ->
- {value, H};
-search(Key, [_|T]) ->
- search(Key, T);
-search(_Key, []) ->
- false.
-
-spec objfile_extension() -> nonempty_string().
objfile_extension() ->
".beam".
@@ -1401,3 +1363,64 @@ run_on_load_handlers([M|Ms], Debug) ->
end
end;
run_on_load_handlers([], _) -> ok.
+
+
+%% debug profile (light variant of eprof)
+debug_profile_start() ->
+ _ = erlang:trace_pattern({'_','_','_'},true,[call_time]),
+ _ = erlang:trace_pattern(on_load,true,[call_time]),
+ _ = erlang:trace(all,true,[call]),
+ ok.
+
+debug_profile_stop() ->
+ _ = erlang:trace_pattern({'_','_','_'},false,[call_time]),
+ _ = erlang:trace_pattern(on_load,false,[call_time]),
+ _ = erlang:trace(all,false,[call]),
+ ok.
+
+debug_profile_mfas() ->
+ _ = erlang:trace_pattern({'_','_','_'},pause,[call_time]),
+ _ = erlang:trace_pattern(on_load,pause,[call_time]),
+ MFAs = collect_loaded_mfas() ++ erlang:system_info(snifs),
+ collect_mfas(MFAs,[]).
+
+%% debug_profile_format_mfas should be called at the end of the boot phase
+%% so all pertinent modules should be loaded at that point.
+debug_profile_format_mfas(MFAs0) ->
+ MFAs = lists:sort(MFAs0),
+ lists:foreach(fun({{Us,C},{M,F,A}}) ->
+ Str = io_lib:format("~w:~w/~w", [M,F,A]),
+ io:format(standard_error,"~55s - ~6w : ~w us~n", [Str,C,Us])
+ end, MFAs),
+ ok.
+
+collect_loaded_mfas() ->
+ Ms = [M || M <- [element(1, Mi) || Mi <- code:all_loaded()]],
+ collect_loaded_mfas(Ms,[]).
+
+collect_loaded_mfas([],MFAs) -> MFAs;
+collect_loaded_mfas([M|Ms],MFAs0) ->
+ MFAs = [{M,F,A} || {F,A} <- M:module_info(functions)],
+ collect_loaded_mfas(Ms,MFAs ++ MFAs0).
+
+
+collect_mfas([], Info) -> Info;
+collect_mfas([MFA|MFAs],Info) ->
+ case erlang:trace_info(MFA,call_time) of
+ {call_time, []} ->
+ collect_mfas(MFAs,Info);
+ {call_time, false} ->
+ collect_mfas(MFAs,Info);
+ {call_time, Data} ->
+ case collect_mfa(MFA,Data,0,0) of
+ {{0,_},_} ->
+ %% ignore mfas with zero time
+ collect_mfas(MFAs,Info);
+ MfaData ->
+ collect_mfas(MFAs,[MfaData|Info])
+ end
+ end.
+
+collect_mfa(Mfa,[],Count,Time) -> {{Time,Count},Mfa};
+collect_mfa(Mfa,[{_Pid,C,S,Us}|Data],Count,Time) ->
+ collect_mfa(Mfa,Data,Count + C,Time + S * 1000000 + Us).