1%% 2%% %CopyrightBegin% 3%% 4%% Copyright Ericsson AB 2000-2020. All Rights Reserved. 5%% 6%% Licensed under the Apache License, Version 2.0 (the "License"); 7%% you may not use this file except in compliance with the License. 8%% You may obtain a copy of the License at 9%% 10%% http://www.apache.org/licenses/LICENSE-2.0 11%% 12%% Unless required by applicable law or agreed to in writing, software 13%% distributed under the License is distributed on an "AS IS" BASIS, 14%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15%% See the License for the specific language governing permissions and 16%% limitations under the License. 17%% 18%% %CopyrightEnd% 19%% 20-module(beam_lib). 21-behaviour(gen_server). 22 23%% Avoid warning for local function error/1 clashing with autoimported BIF. 24-compile({no_auto_import,[error/1]}). 25%% Avoid warning for local function error/2 clashing with autoimported BIF. 26-compile({no_auto_import,[error/2]}). 27-export([info/1, 28 cmp/2, 29 cmp_dirs/2, 30 chunks/2, 31 chunks/3, 32 all_chunks/1, 33 diff_dirs/2, 34 strip/1, 35 strip/2, 36 strip_files/1, 37 strip_files/2, 38 strip_release/1, 39 strip_release/2, 40 significant_chunks/0, 41 build_module/1, 42 version/1, 43 md5/1, 44 format_error/1]). 45 46%% The following functions implement encrypted debug info. 47 48-export([crypto_key_fun/1, clear_crypto_key_fun/0]). 49-export([init/1,handle_call/3,handle_cast/2,handle_info/2, 50 terminate/2,code_change/3]). 51-export([make_crypto_key/2, get_crypto_key/1]). %Utilities used by compiler 52 53-export_type([attrib_entry/0, compinfo_entry/0, labeled_entry/0, label/0]). 54 55-import(lists, [append/1, delete/2, foreach/2, keysort/2, 56 member/2, reverse/1, sort/1, splitwith/2]). 57 58%%------------------------------------------------------------------------- 59 60-type beam() :: file:filename() | binary(). 61-type debug_info() :: {DbgiVersion :: atom(), Backend :: module(), Data :: term()} | 'no_debug_info'. 62 63-type forms() :: [erl_parse:abstract_form() | erl_parse:form_info()]. 64 65-type abst_code() :: {AbstVersion :: atom(), forms()} | 'no_abstract_code'. 66-type dataB() :: binary(). 67-type index() :: non_neg_integer(). 68-type label() :: integer(). 69 70-type chunkid() :: nonempty_string(). % approximation of the strings below 71%% "Abst" | "Dbgi" | "Attr" | "CInf" | "ExpT" | "ImpT" | "LocT" | "Atom" | "AtU8". 72-type chunkname() :: 'abstract_code' | 'debug_info' 73 | 'attributes' | 'compile_info' 74 | 'exports' | 'labeled_exports' 75 | 'imports' | 'indexed_imports' 76 | 'locals' | 'labeled_locals' 77 | 'atoms'. 78-type chunkref() :: chunkname() | chunkid(). 79 80-type attrib_entry() :: {Attribute :: atom(), [AttributeValue :: term()]}. 81-type compinfo_entry() :: {InfoKey :: atom(), term()}. 82-type labeled_entry() :: {Function :: atom(), arity(), label()}. 83 84-type chunkdata() :: {chunkid(), dataB()} 85 | {'abstract_code', abst_code()} 86 | {'debug_info', debug_info()} 87 | {'attributes', [attrib_entry()]} 88 | {'compile_info', [compinfo_entry()]} 89 | {'exports', [{atom(), arity()}]} 90 | {'labeled_exports', [labeled_entry()]} 91 | {'imports', [mfa()]} 92 | {'indexed_imports', [{index(), module(), Function :: atom(), arity()}]} 93 | {'locals', [{atom(), arity()}]} 94 | {'labeled_locals', [labeled_entry()]} 95 | {'atoms', [{integer(), atom()}]}. 96 97%% Error reasons 98-type info_rsn() :: {'chunk_too_big', file:filename(), 99 chunkid(), ChunkSize :: non_neg_integer(), 100 FileSize :: non_neg_integer()} 101 | {'invalid_beam_file', file:filename(), 102 Position :: non_neg_integer()} 103 | {'invalid_chunk', file:filename(), chunkid()} 104 | {'missing_chunk', file:filename(), chunkid()} 105 | {'not_a_beam_file', file:filename()} 106 | {'file_error', file:filename(), file:posix()}. 107-type chnk_rsn() :: {'unknown_chunk', file:filename(), atom()} 108 | {'key_missing_or_invalid', file:filename(), 109 'abstract_code' | 'debug_info'} 110 | info_rsn(). 111-type cmp_rsn() :: {'modules_different', module(), module()} 112 | {'chunks_different', chunkid()} 113 | 'different_chunks' 114 | info_rsn(). 115 116%%------------------------------------------------------------------------- 117 118%% 119%% Exported functions 120%% 121 122-spec info(Beam) -> [InfoPair] | {'error', 'beam_lib', info_rsn()} when 123 Beam :: beam(), 124 InfoPair :: {'file', Filename :: file:filename()} 125 | {'binary', Binary :: binary()} 126 | {'module', Module :: module()} 127 | {'chunks', [{ChunkId :: chunkid(), 128 Pos :: non_neg_integer(), 129 Size :: non_neg_integer()}]}. 130 131info(File) -> 132 read_info(beam_filename(File)). 133 134-spec chunks(Beam, ChunkRefs) -> 135 {'ok', {module(), [chunkdata()]}} | 136 {'error', 'beam_lib', chnk_rsn()} when 137 Beam :: beam(), 138 ChunkRefs :: [chunkref()]. 139 140chunks(File, Chunks) -> 141 read_chunk_data(File, Chunks). 142 143-spec chunks(Beam, ChunkRefs, Options) -> 144 {'ok', {module(), [ChunkResult]}} | 145 {'error', 'beam_lib', chnk_rsn()} when 146 Beam :: beam(), 147 ChunkRefs :: [chunkref()], 148 Options :: ['allow_missing_chunks'], 149 ChunkResult :: chunkdata() | {ChunkRef :: chunkref(), 'missing_chunk'}. 150 151chunks(File, Chunks, Options) -> 152 try read_chunk_data(File, Chunks, Options) 153 catch Error -> Error end. 154 155-spec all_chunks(beam()) -> 156 {'ok', 'beam_lib', [{chunkid(), dataB()}]} | {'error', 'beam_lib', info_rsn()}. 157 158all_chunks(File) -> 159 read_all_chunks(File). 160 161-spec cmp(Beam1, Beam2) -> 'ok' | {'error', 'beam_lib', cmp_rsn()} when 162 Beam1 :: beam(), 163 Beam2 :: beam(). 164 165cmp(File1, File2) -> 166 try cmp_files(File1, File2) 167 catch Error -> Error end. 168 169-spec cmp_dirs(Dir1, Dir2) -> 170 {Only1, Only2, Different} | {'error', 'beam_lib', Reason} when 171 Dir1 :: atom() | file:filename(), 172 Dir2 :: atom() | file:filename(), 173 Only1 :: [file:filename()], 174 Only2 :: [file:filename()], 175 Different :: [{Filename1 :: file:filename(), Filename2 :: file:filename()}], 176 Reason :: {'not_a_directory', term()} | info_rsn(). 177 178cmp_dirs(Dir1, Dir2) -> 179 catch compare_dirs(Dir1, Dir2). 180 181-spec diff_dirs(Dir1, Dir2) -> 'ok' | {'error', 'beam_lib', Reason} when 182 Dir1 :: atom() | file:filename(), 183 Dir2 :: atom() | file:filename(), 184 Reason :: {'not_a_directory', term()} | info_rsn(). 185 186diff_dirs(Dir1, Dir2) -> 187 catch diff_directories(Dir1, Dir2). 188 189-spec strip(Beam1) -> 190 {'ok', {module(), Beam2}} | {'error', 'beam_lib', info_rsn()} when 191 Beam1 :: beam(), 192 Beam2 :: beam(). 193 194strip(FileName) -> 195 strip(FileName, []). 196 197-spec strip(Beam1, AdditionalChunks) -> 198 {'ok', {module(), Beam2}} | {'error', 'beam_lib', info_rsn()} when 199 Beam1 :: beam(), 200 AdditionalChunks :: [chunkid()], 201 Beam2 :: beam(). 202 203strip(FileName, AdditionalChunks) -> 204 try strip_file(FileName, AdditionalChunks) 205 catch Error -> Error end. 206 207-spec strip_files(Files) -> 208 {'ok', [{module(), Beam}]} | {'error', 'beam_lib', info_rsn()} when 209 Files :: [beam()], 210 Beam :: beam(). 211 212strip_files(Files) -> 213 strip_files(Files, []). 214 215-spec strip_files(Files, AdditionalChunks) -> 216 {'ok', [{module(), Beam}]} | {'error', 'beam_lib', info_rsn()} when 217 Files :: [beam()], 218 AdditionalChunks :: [chunkid()], 219 Beam :: beam(). 220 221strip_files(Files, AdditionalChunks) when is_list(Files) -> 222 try strip_fils(Files, AdditionalChunks) 223 catch Error -> Error end. 224 225-spec strip_release(Dir) -> 226 {'ok', [{module(), file:filename()}]} 227 | {'error', 'beam_lib', Reason} when 228 Dir :: atom() | file:filename(), 229 Reason :: {'not_a_directory', term()} | info_rsn(). 230 231strip_release(Root) -> 232 strip_release(Root, []). 233 234-spec strip_release(Dir, AdditionalChunks) -> 235 {'ok', [{module(), file:filename()}]} 236 | {'error', 'beam_lib', Reason} when 237 Dir :: atom() | file:filename(), 238 AdditionalChunks :: [chunkid()], 239 Reason :: {'not_a_directory', term()} | info_rsn(). 240 241strip_release(Root, AdditionalChunks) -> 242 catch strip_rel(Root, AdditionalChunks). 243 244-spec version(Beam) -> 245 {'ok', {module(), [Version :: term()]}} | 246 {'error', 'beam_lib', chnk_rsn()} when 247 Beam :: beam(). 248 249version(File) -> 250 case catch read_chunk_data(File, [attributes]) of 251 {ok, {Module, [{attributes, Attrs}]}} -> 252 {vsn, Version} = lists:keyfind(vsn, 1, Attrs), 253 {ok, {Module, Version}}; 254 Error -> 255 Error 256 end. 257 258-spec md5(Beam) -> 259 {'ok', {module(), MD5}} | {'error', 'beam_lib', chnk_rsn()} when 260 Beam :: beam(), 261 MD5 :: binary(). 262 263md5(File) -> 264 case catch read_significant_chunks(File, md5_chunks()) of 265 {ok, {Module, Chunks0}} -> 266 Chunks = filter_funtab(Chunks0), 267 {ok, {Module, erlang:md5([C || {_Id, C} <- Chunks])}}; 268 Error -> 269 Error 270 end. 271 272-spec format_error(Reason) -> io_lib:chars() when 273 Reason :: term(). 274 275format_error({error, Error}) -> 276 format_error(Error); 277format_error({error, Module, Error}) -> 278 Module:format_error(Error); 279format_error({unknown_chunk, File, ChunkName}) -> 280 io_lib:format("~tp: Cannot find chunk ~p~n", [File, ChunkName]); 281format_error({invalid_chunk, File, ChunkId}) -> 282 io_lib:format("~tp: Invalid contents of chunk ~p~n", [File, ChunkId]); 283format_error({not_a_beam_file, File}) -> 284 io_lib:format("~tp: Not a BEAM file~n", [File]); 285format_error({file_error, File, Reason}) -> 286 io_lib:format("~tp: ~tp~n", [File, file:format_error(Reason)]); 287format_error({missing_chunk, File, ChunkId}) -> 288 io_lib:format("~tp: Not a BEAM file: no IFF \"~s\" chunk~n", 289 [File, ChunkId]); 290format_error({invalid_beam_file, File, Pos}) -> 291 io_lib:format("~tp: Invalid format of BEAM file near byte number ~p~n", 292 [File, Pos]); 293format_error({chunk_too_big, File, ChunkId, Size, Len}) -> 294 io_lib:format("~tp: Size of chunk \"~s\" is ~p bytes, " 295 "but only ~p bytes could be read~n", 296 [File, ChunkId, Size, Len]); 297format_error({chunks_different, Id}) -> 298 io_lib:format("Chunk \"~s\" differs in the two files~n", [Id]); 299format_error(different_chunks) -> 300 "The two files have different chunks\n"; 301format_error({modules_different, Module1, Module2}) -> 302 io_lib:format("Module names ~p and ~p differ in the two files~n", 303 [Module1, Module2]); 304format_error({not_a_directory, Name}) -> 305 io_lib:format("~tp: Not a directory~n", [Name]); 306format_error({key_missing_or_invalid, File, ChunkId}) -> 307 io_lib:format("~tp: Cannot decrypt ~ts because key is missing or invalid", 308 [File, ChunkId]); 309format_error(badfun) -> 310 "not a fun or the fun has the wrong arity"; 311format_error(exists) -> 312 "a fun has already been installed"; 313format_error(E) -> 314 io_lib:format("~tp~n", [E]). 315 316%% 317%% Exported functions for encrypted debug info. 318%% 319 320-type mode() :: 'des3_cbc'. 321-type crypto_fun_arg() :: 'init' 322 | 'clear' 323 | {'debug_info', mode(), module(), file:filename()}. 324-type crypto_fun() :: fun((crypto_fun_arg()) -> term()). 325 326-spec crypto_key_fun(CryptoKeyFun) -> 'ok' | {'error', Reason} when 327 CryptoKeyFun :: crypto_fun(), 328 Reason :: badfun | exists | term(). 329 330crypto_key_fun(F) -> 331 call_crypto_server({crypto_key_fun, F}). 332 333-spec clear_crypto_key_fun() -> 'undefined' | {'ok', Result} when 334 Result :: 'undefined' | term(). 335 336clear_crypto_key_fun() -> 337 call_crypto_server(clear_crypto_key_fun). 338 339-spec make_crypto_key(mode(), string()) -> 340 {mode(), [binary()], binary(), integer()}. 341 342make_crypto_key(des3_cbc=Type, String) -> 343 <<K1:8/binary,K2:8/binary>> = First = erlang:md5(String), 344 <<K3:8/binary,IVec:8/binary>> = erlang:md5([First|reverse(String)]), 345 {Type,[K1,K2,K3],IVec,8}. 346 347-spec build_module(Chunks) -> {'ok', Binary} when 348 Chunks :: [{chunkid(), dataB()}], 349 Binary :: binary(). 350 351build_module(Chunks0) -> 352 Chunks = list_to_binary(build_chunks(Chunks0)), 353 Size = byte_size(Chunks), 354 0 = Size rem 4, % Assertion: correct padding? 355 {ok, <<"FOR1", (Size+4):32, "BEAM", Chunks/binary>>}. 356 357 358%% 359%% Local functions 360%% 361 362read_info(File) -> 363 try 364 {ok, Module, Data} = scan_beam(File, info), 365 [if 366 is_binary(File) -> {binary, File}; 367 true -> {file, File} 368 end, {module, Module}, {chunks, Data}] 369 catch Error -> Error end. 370 371diff_directories(Dir1, Dir2) -> 372 {OnlyDir1, OnlyDir2, Diff} = compare_dirs(Dir1, Dir2), 373 diff_only(Dir1, OnlyDir1), 374 diff_only(Dir2, OnlyDir2), 375 foreach(fun(D) -> io:format("** different: ~tp~n", [D]) end, Diff), 376 ok. 377 378diff_only(_Dir, []) -> 379 ok; 380diff_only(Dir, Only) -> 381 io:format("Only in ~tp: ~tp~n", [Dir, Only]). 382 383%% -> {OnlyInDir1, OnlyInDir2, Different} | throw(Error) 384compare_dirs(Dir1, Dir2) -> 385 R1 = sofs:relation(beam_files(Dir1)), 386 R2 = sofs:relation(beam_files(Dir2)), 387 F1 = sofs:domain(R1), 388 F2 = sofs:domain(R2), 389 {O1, Both, O2} = sofs:symmetric_partition(F1, F2), 390 OnlyL1 = sofs:image(R1, O1), 391 OnlyL2 = sofs:image(R2, O2), 392 B1 = sofs:to_external(sofs:restriction(R1, Both)), 393 B2 = sofs:to_external(sofs:restriction(R2, Both)), 394 Diff = compare_files(B1, B2, []), 395 {sofs:to_external(OnlyL1), sofs:to_external(OnlyL2), Diff}. 396 397compare_files([], [], Acc) -> 398 lists:reverse(Acc); 399compare_files([{_,F1} | R1], [{_,F2} | R2], Acc) -> 400 NAcc = case catch cmp_files(F1, F2) of 401 {error, _Mod, _Reason} -> 402 [{F1, F2} | Acc]; 403 ok -> 404 Acc 405 end, 406 compare_files(R1, R2, NAcc). 407 408beam_files(Dir) -> 409 ok = assert_directory(Dir), 410 L = filelib:wildcard(filename:join(Dir, "*.beam")), 411 [{filename:basename(Path), Path} || Path <- L]. 412 413%% -> ok | throw(Error) 414cmp_files(File1, File2) -> 415 {ok, {M1, L1}} = read_all_but_useless_chunks(File1), 416 {ok, {M2, L2}} = read_all_but_useless_chunks(File2), 417 if 418 M1 =:= M2 -> 419 cmp_lists(L1, L2); 420 true -> 421 error({modules_different, M1, M2}) 422 end. 423 424cmp_lists([], []) -> 425 ok; 426cmp_lists([{Id, C1} | R1], [{Id, C2} | R2]) -> 427 if 428 C1 =:= C2 -> 429 cmp_lists(R1, R2); 430 true -> 431 error({chunks_different, Id}) 432 end; 433cmp_lists(_, _) -> 434 error(different_chunks). 435 436strip_rel(Root, AdditionalChunks) -> 437 ok = assert_directory(Root), 438 strip_fils(filelib:wildcard(filename:join(Root, "lib/*/ebin/*.beam")), AdditionalChunks). 439 440%% -> {ok, [{Mod, BinaryOrFileName}]} | throw(Error) 441strip_fils(Files, AdditionalChunks) -> 442 {ok, [begin {ok, Reply} = strip_file(F, AdditionalChunks), Reply end || F <- Files]}. 443 444%% -> {ok, {Mod, FileName}} | {ok, {Mod, binary()}} | throw(Error) 445strip_file(File, AdditionalChunks) -> 446 {ok, {Mod, Chunks}} = read_significant_chunks(File, AdditionalChunks ++ significant_chunks()), 447 {ok, Stripped0} = build_module(Chunks), 448 Stripped = compress(Stripped0), 449 case File of 450 _ when is_binary(File) -> 451 {ok, {Mod, Stripped}}; 452 _ -> 453 FileName = beam_filename(File), 454 case file:open(FileName, [raw, binary, write]) of 455 {ok, Fd} -> 456 case file:write(Fd, Stripped) of 457 ok -> 458 ok = file:close(Fd), 459 {ok, {Mod, FileName}}; 460 Error -> 461 ok = file:close(Fd), 462 file_error(FileName, Error) 463 end; 464 Error -> 465 file_error(FileName, Error) 466 end 467 end. 468 469build_chunks([{Id, Data} | Chunks]) -> 470 BId = list_to_binary(Id), 471 Size = byte_size(Data), 472 Chunk = [<<BId/binary, Size:32>>, Data | pad(Size)], 473 [Chunk | build_chunks(Chunks)]; 474build_chunks([]) -> 475 []. 476 477pad(Size) -> 478 case Size rem 4 of 479 0 -> []; 480 Rem -> lists:duplicate(4 - Rem, 0) 481 end. 482 483%% -> {ok, {Module, Chunks}} | throw(Error) 484read_all_but_useless_chunks(File0) when is_atom(File0); 485 is_list(File0); 486 is_binary(File0) -> 487 File = beam_filename(File0), 488 {ok, Module, ChunkIds0} = scan_beam(File, info), 489 ChunkIds = [Name || {Name,_,_} <- ChunkIds0, 490 not is_useless_chunk(Name)], 491 {ok, Module, Chunks} = scan_beam(File, ChunkIds), 492 {ok, {Module, lists:reverse(Chunks)}}. 493 494is_useless_chunk("CInf") -> true; 495is_useless_chunk(_) -> false. 496 497%% -> {ok, {Module, Chunks}} | throw(Error) 498read_significant_chunks(File, ChunkList) -> 499 case read_chunk_data(File, ChunkList, [allow_missing_chunks]) of 500 {ok, {Module, Chunks0}} -> 501 Mandatory = mandatory_chunks(), 502 Chunks = filter_significant_chunks(Chunks0, Mandatory, File, Module), 503 {ok, {Module, Chunks}} 504 end. 505 506filter_significant_chunks([{_, Data}=Pair|Cs], Mandatory, File, Mod) 507 when is_binary(Data) -> 508 [Pair|filter_significant_chunks(Cs, Mandatory, File, Mod)]; 509filter_significant_chunks([{Id, missing_chunk}|Cs], Mandatory, File, Mod) -> 510 case member(Id, Mandatory) of 511 false -> 512 filter_significant_chunks(Cs, Mandatory, File, Mod); 513 true -> 514 error({missing_chunk, File, Id}) 515 end; 516filter_significant_chunks([], _, _, _) -> []. 517 518filter_funtab([{"FunT"=Tag, <<L:4/binary, Data0/binary>>}|Cs]) -> 519 Data = filter_funtab_1(Data0, <<0:32>>), 520 Funtab = <<L/binary, (iolist_to_binary(Data))/binary>>, 521 [{Tag, Funtab}|filter_funtab(Cs)]; 522filter_funtab([H|T]) -> 523 [H|filter_funtab(T)]; 524filter_funtab([]) -> []. 525 526filter_funtab_1(<<Important:20/binary,_OldUniq:4/binary,T/binary>>, Zero) -> 527 [Important,Zero|filter_funtab_1(T, Zero)]; 528filter_funtab_1(Tail, _) when is_binary(Tail) -> [Tail]. 529 530read_all_chunks(File0) when is_atom(File0); 531 is_list(File0); 532 is_binary(File0) -> 533 try 534 File = beam_filename(File0), 535 {ok, Module, ChunkIds0} = scan_beam(File, info), 536 ChunkIds = [Name || {Name,_,_} <- ChunkIds0], 537 {ok, Module, Chunks} = scan_beam(File, ChunkIds), 538 {ok, Module, lists:reverse(Chunks)} 539 catch Error -> Error end. 540 541read_chunk_data(File0, ChunkNames) -> 542 try read_chunk_data(File0, ChunkNames, []) 543 catch Error -> Error end. 544 545%% -> {ok, {Module, Symbols}} | throw(Error) 546read_chunk_data(File0, ChunkNames0, Options) 547 when is_atom(File0); is_list(File0); is_binary(File0) -> 548 File = beam_filename(File0), 549 {ChunkIds, Names, Optional} = check_chunks(ChunkNames0, File, [], [], []), 550 AllowMissingChunks = member(allow_missing_chunks, Options), 551 {ok, Module, Chunks} = scan_beam(File, ChunkIds, AllowMissingChunks, Optional), 552 AT = ets:new(beam_symbols, []), 553 T = {empty, AT}, 554 try chunks_to_data(Names, Chunks, File, Chunks, Module, T, []) 555 after ets:delete(AT) 556 end. 557 558%% -> {ok, list()} | throw(Error) 559check_chunks([atoms | Ids], File, IL, L, O) -> 560 check_chunks(Ids, File, ["Atom", "AtU8" | IL], 561 [{atom_chunk, atoms} | L], ["Atom", "AtU8" | O]); 562check_chunks([abstract_code | Ids], File, IL, L, O) -> 563 check_chunks(Ids, File, ["Abst", "Dbgi" | IL], 564 [{abst_chunk, abstract_code} | L], ["Abst", "Dbgi" | O]); 565check_chunks([ChunkName | Ids], File, IL, L, O) when is_atom(ChunkName) -> 566 ChunkId = chunk_name_to_id(ChunkName, File), 567 check_chunks(Ids, File, [ChunkId | IL], [{ChunkId, ChunkName} | L], O); 568check_chunks([ChunkId | Ids], File, IL, L, O) -> % when is_list(ChunkId) 569 check_chunks(Ids, File, [ChunkId | IL], [{ChunkId, ChunkId} | L], O); 570check_chunks([], _File, IL, L, O) -> 571 {lists:usort(IL), reverse(L), O}. 572 573%% -> {ok, Module, Data} | throw(Error) 574scan_beam(File, What) -> 575 scan_beam(File, What, false, []). 576 577%% -> {ok, Module, Data} | throw(Error) 578scan_beam(File, What0, AllowMissingChunks, OptionalChunks) -> 579 case scan_beam1(File, What0) of 580 {missing, _FD, Mod, Data, What} when AllowMissingChunks -> 581 {ok, Mod, [{Id, missing_chunk} || Id <- What] ++ Data}; 582 {missing, FD, Mod, Data, What} -> 583 case What -- OptionalChunks of 584 [] -> {ok, Mod, Data}; 585 [Missing | _] -> error({missing_chunk, filename(FD), Missing}) 586 end; 587 R -> 588 R 589 end. 590 591%% -> {ok, Module, Data} | throw(Error) 592scan_beam1(File, What) -> 593 FD = open_file(File), 594 case catch scan_beam2(FD, What) of 595 Error when error =:= element(1, Error) -> 596 throw(Error); 597 R -> 598 R 599 end. 600 601scan_beam2(FD, What) -> 602 case pread(FD, 0, 12) of 603 {NFD, {ok, <<"FOR1", _Size:32, "BEAM">>}} -> 604 Start = 12, 605 scan_beam(NFD, Start, What, 17, []); 606 _Error -> 607 error({not_a_beam_file, filename(FD)}) 608 end. 609 610scan_beam(_FD, _Pos, [], Mod, Data) when Mod =/= 17 -> 611 {ok, Mod, Data}; 612scan_beam(FD, Pos, What, Mod, Data) -> 613 case pread(FD, Pos, 8) of 614 {_NFD, eof} when Mod =:= 17 -> 615 error({missing_chunk, filename(FD), "Atom"}); 616 {_NFD, eof} when What =:= info -> 617 {ok, Mod, reverse(Data)}; 618 {NFD, eof} -> 619 {missing, NFD, Mod, Data, What}; 620 {NFD, {ok, <<IdL:4/binary, Sz:32>>}} -> 621 Id = binary_to_list(IdL), 622 Pos1 = Pos + 8, 623 Pos2 = (4 * trunc((Sz+3) / 4)) + Pos1, 624 get_data(What, Id, NFD, Sz, Pos1, Pos2, Mod, Data); 625 {_NFD, {ok, _ChunkHead}} -> 626 error({invalid_beam_file, filename(FD), Pos}) 627 end. 628 629get_atom_data(Cs, Id, FD, Size, Pos, Pos2, Data, Encoding) -> 630 NewCs = del_chunk(Id, Cs), 631 {NFD, Chunk} = get_chunk(Id, Pos, Size, FD), 632 <<_Num:32, Chunk2/binary>> = Chunk, 633 {Module, _} = extract_atom(Chunk2, Encoding), 634 C = case Cs of 635 info -> 636 {Id, Pos, Size}; 637 _ -> 638 {Id, Chunk} 639 end, 640 scan_beam(NFD, Pos2, NewCs, Module, [C | Data]). 641 642get_data(Cs, "Atom" = Id, FD, Size, Pos, Pos2, _Mod, Data) -> 643 get_atom_data(Cs, Id, FD, Size, Pos, Pos2, Data, latin1); 644get_data(Cs, "AtU8" = Id, FD, Size, Pos, Pos2, _Mod, Data) -> 645 get_atom_data(Cs, Id, FD, Size, Pos, Pos2, Data, utf8); 646get_data(info, Id, FD, Size, Pos, Pos2, Mod, Data) -> 647 scan_beam(FD, Pos2, info, Mod, [{Id, Pos, Size} | Data]); 648get_data(Chunks, Id, FD, Size, Pos, Pos2, Mod, Data) -> 649 {NFD, NewData} = case member(Id, Chunks) of 650 true -> 651 {FD1, Chunk} = get_chunk(Id, Pos, Size, FD), 652 {FD1, [{Id, Chunk} | Data]}; 653 false -> 654 {FD, Data} 655 end, 656 NewChunks = del_chunk(Id, Chunks), 657 scan_beam(NFD, Pos2, NewChunks, Mod, NewData). 658 659del_chunk(_Id, info) -> 660 info; 661del_chunk(Id, Chunks) -> 662 delete(Id, Chunks). 663 664%% -> {NFD, binary()} | throw(Error) 665get_chunk(Id, Pos, Size, FD) -> 666 case pread(FD, Pos, Size) of 667 {NFD, eof} when Size =:= 0 -> % cannot happen 668 {NFD, <<>>}; 669 {_NFD, eof} when Size > 0 -> 670 error({chunk_too_big, filename(FD), Id, Size, 0}); 671 {_NFD, {ok, Chunk}} when Size > byte_size(Chunk) -> 672 error({chunk_too_big, filename(FD), Id, Size, byte_size(Chunk)}); 673 {NFD, {ok, Chunk}} -> % when Size =:= size(Chunk) 674 {NFD, Chunk} 675 end. 676 677chunks_to_data([{atom_chunk, Name} | CNs], Chunks, File, Cs, Module, Atoms, L) -> 678 {NewAtoms, Ret} = chunk_to_data(Name, <<"">>, File, Cs, Atoms, Module), 679 chunks_to_data(CNs, Chunks, File, Cs, Module, NewAtoms, [Ret | L]); 680chunks_to_data([{abst_chunk, Name} | CNs], Chunks, File, Cs, Module, Atoms, L) -> 681 DbgiChunk = proplists:get_value("Dbgi", Chunks, <<"">>), 682 {NewAtoms, Ret} = 683 case catch chunk_to_data(debug_info, DbgiChunk, File, Cs, Atoms, Module) of 684 {DbgiAtoms, {debug_info, {debug_info_v1, Backend, Metadata}}} -> 685 case Backend:debug_info(erlang_v1, Module, Metadata, []) of 686 {ok, Code} -> {DbgiAtoms, {abstract_code, {raw_abstract_v1, Code}}}; 687 {error, _} -> {DbgiAtoms, {abstract_code, no_abstract_code}} 688 end; 689 {error,beam_lib,{key_missing_or_invalid,Path,debug_info}} -> 690 error({key_missing_or_invalid,Path,abstract_code}); 691 _ -> 692 AbstChunk = proplists:get_value("Abst", Chunks, <<"">>), 693 chunk_to_data(Name, AbstChunk, File, Cs, Atoms, Module) 694 end, 695 chunks_to_data(CNs, Chunks, File, Cs, Module, NewAtoms, [Ret | L]); 696chunks_to_data([{Id, Name} | CNs], Chunks, File, Cs, Module, Atoms, L) -> 697 {_Id, Chunk} = lists:keyfind(Id, 1, Chunks), 698 {NewAtoms, Ret} = chunk_to_data(Name, Chunk, File, Cs, Atoms, Module), 699 chunks_to_data(CNs, Chunks, File, Cs, Module, NewAtoms, [Ret | L]); 700chunks_to_data([], _Chunks, _File, _Cs, Module, _Atoms, L) -> 701 {ok, {Module, reverse(L)}}. 702 703chunk_to_data(attributes=Id, Chunk, File, _Cs, AtomTable, _Mod) -> 704 try 705 Term = binary_to_term(Chunk), 706 {AtomTable, {Id, attributes(Term)}} 707 catch 708 error:badarg -> 709 error({invalid_chunk, File, chunk_name_to_id(Id, File)}) 710 end; 711chunk_to_data(compile_info=Id, Chunk, File, _Cs, AtomTable, _Mod) -> 712 try 713 {AtomTable, {Id, binary_to_term(Chunk)}} 714 catch 715 error:badarg -> 716 error({invalid_chunk, File, chunk_name_to_id(Id, File)}) 717 end; 718chunk_to_data(debug_info=Id, Chunk, File, _Cs, AtomTable, Mod) -> 719 case Chunk of 720 <<>> -> 721 {AtomTable, {Id, no_debug_info}}; 722 <<0:8,N:8,Mode0:N/binary,Rest/binary>> -> 723 Mode = binary_to_atom(Mode0, utf8), 724 Term = decrypt_chunk(Mode, Mod, File, Id, Rest), 725 {AtomTable, {Id, anno_from_term(Term)}}; 726 _ -> 727 case catch binary_to_term(Chunk) of 728 {'EXIT', _} -> 729 error({invalid_chunk, File, chunk_name_to_id(Id, File)}); 730 Term -> 731 {AtomTable, {Id, anno_from_term(Term)}} 732 end 733 end; 734chunk_to_data(abstract_code=Id, Chunk, File, _Cs, AtomTable, Mod) -> 735 %% Before Erlang/OTP 20.0. 736 case Chunk of 737 <<>> -> 738 {AtomTable, {Id, no_abstract_code}}; 739 <<0:8,N:8,Mode0:N/binary,Rest/binary>> -> 740 Mode = binary_to_atom(Mode0, utf8), 741 Term = decrypt_chunk(Mode, Mod, File, Id, Rest), 742 {AtomTable, {Id, old_anno_from_term(Term)}}; 743 _ -> 744 case catch binary_to_term(Chunk) of 745 {'EXIT', _} -> 746 error({invalid_chunk, File, chunk_name_to_id(Id, File)}); 747 Term -> 748 try 749 {AtomTable, {Id, old_anno_from_term(Term)}} 750 catch 751 _:_ -> 752 error({invalid_chunk, File, 753 chunk_name_to_id(Id, File)}) 754 end 755 end 756 end; 757chunk_to_data(atoms=Id, _Chunk, _File, Cs, AtomTable0, _Mod) -> 758 AtomTable = ensure_atoms(AtomTable0, Cs), 759 Atoms = ets:tab2list(AtomTable), 760 {AtomTable, {Id, lists:sort(Atoms)}}; 761chunk_to_data(ChunkName, Chunk, File, 762 Cs, AtomTable, _Mod) when is_atom(ChunkName) -> 763 case catch symbols(Chunk, AtomTable, Cs, ChunkName) of 764 {ok, NewAtomTable, S} -> 765 {NewAtomTable, {ChunkName, S}}; 766 {'EXIT', _} -> 767 error({invalid_chunk, File, chunk_name_to_id(ChunkName, File)}) 768 end; 769chunk_to_data(ChunkId, Chunk, _File, 770 _Cs, AtomTable, _Module) when is_list(ChunkId) -> 771 {AtomTable, {ChunkId, Chunk}}. % Chunk is a binary 772 773chunk_name_to_id(indexed_imports, _) -> "ImpT"; 774chunk_name_to_id(imports, _) -> "ImpT"; 775chunk_name_to_id(exports, _) -> "ExpT"; 776chunk_name_to_id(labeled_exports, _) -> "ExpT"; 777chunk_name_to_id(locals, _) -> "LocT"; 778chunk_name_to_id(labeled_locals, _) -> "LocT"; 779chunk_name_to_id(attributes, _) -> "Attr"; 780chunk_name_to_id(abstract_code, _) -> "Abst"; 781chunk_name_to_id(debug_info, _) -> "Dbgi"; 782chunk_name_to_id(compile_info, _) -> "CInf"; 783chunk_name_to_id(Other, File) -> 784 error({unknown_chunk, File, Other}). 785 786%% Extract attributes 787 788attributes(Attrs) -> 789 attributes(keysort(1, Attrs), []). 790 791attributes([], R) -> 792 reverse(R); 793attributes(L, R) -> 794 K = element(1, hd(L)), 795 {L1, L2} = splitwith(fun(T) -> element(1, T) =:= K end, L), 796 V = append([A || {_, A} <- L1]), 797 attributes(L2, [{K, V} | R]). 798 799%% Extract symbols 800 801symbols(<<_Num:32, B/binary>>, AT0, Cs, Name) -> 802 AT = ensure_atoms(AT0, Cs), 803 symbols1(B, AT, Name, [], 1). 804 805symbols1(<<I1:32, I2:32, I3:32, B/binary>>, AT, Name, S, Cnt) -> 806 Symbol = symbol(Name, AT, I1, I2, I3, Cnt), 807 symbols1(B, AT, Name, [Symbol|S], Cnt+1); 808symbols1(<<>>, AT, _Name, S, _Cnt) -> 809 {ok, AT, sort(S)}. 810 811symbol(indexed_imports, AT, I1, I2, I3, Cnt) -> 812 {Cnt, atm(AT, I1), atm(AT, I2), I3}; 813symbol(imports, AT, I1, I2, I3, _Cnt) -> 814 {atm(AT, I1), atm(AT, I2), I3}; 815symbol(labeled_exports, AT, I1, I2, I3, _Cnt) -> 816 {atm(AT, I1), I2, I3}; 817symbol(labeled_locals, AT, I1, I2, I3, _Cnt) -> 818 {atm(AT, I1), I2, I3}; 819symbol(_, AT, I1, I2, _I3, _Cnt) -> 820 {atm(AT, I1), I2}. 821 822atm(AT, N) -> 823 [{_N, S}] = ets:lookup(AT, N), 824 S. 825 826%% AT is updated. 827ensure_atoms({empty, AT}, Cs) -> 828 case lists:keyfind("AtU8", 1, Cs) of 829 {_Id, AtomChunk} when is_binary(AtomChunk) -> 830 extract_atoms(AtomChunk, AT, utf8); 831 _ -> 832 {_Id, AtomChunk} = lists:keyfind("Atom", 1, Cs), 833 extract_atoms(AtomChunk, AT, latin1) 834 end, 835 AT; 836ensure_atoms(AT, _Cs) -> 837 AT. 838 839extract_atoms(<<_Num:32, B/binary>>, AT, Encoding) -> 840 extract_atoms(B, 1, AT, Encoding). 841 842extract_atoms(<<>>, _I, _AT, _Encoding) -> 843 true; 844extract_atoms(B, I, AT, Encoding) -> 845 {Atom, B1} = extract_atom(B, Encoding), 846 true = ets:insert(AT, {I, Atom}), 847 extract_atoms(B1, I+1, AT, Encoding). 848 849extract_atom(<<Len, B/binary>>, Encoding) -> 850 <<SB:Len/binary, Tail/binary>> = B, 851 {binary_to_atom(SB, Encoding), Tail}. 852 853%%% Utils. 854 855-record(bb, {pos = 0 :: integer(), 856 bin :: binary(), 857 source :: binary() | string()}). 858 859open_file(<<"FOR1",_/binary>>=Binary) -> 860 #bb{bin = Binary, source = Binary}; 861open_file(Binary0) when is_binary(Binary0) -> 862 Binary = uncompress(Binary0), 863 #bb{bin = Binary, source = Binary}; 864open_file(FileName) -> 865 case file:open(FileName, [read, raw, binary]) of 866 {ok, Fd} -> 867 read_all(Fd, FileName, []); 868 Error -> 869 file_error(FileName, Error) 870 end. 871 872read_all(Fd, FileName, Bins) -> 873 case file:read(Fd, 1 bsl 18) of 874 {ok, Bin} -> 875 read_all(Fd, FileName, [Bin | Bins]); 876 eof -> 877 ok = file:close(Fd), 878 #bb{bin = uncompress(reverse(Bins)), source = FileName}; 879 Error -> 880 ok = file:close(Fd), 881 file_error(FileName, Error) 882 end. 883 884pread(FD, AtPos, Size) -> 885 #bb{pos = Pos, bin = Binary} = FD, 886 Skip = AtPos-Pos, 887 case Binary of 888 <<_:Skip/binary, B:Size/binary, Bin/binary>> -> 889 NFD = FD#bb{pos = AtPos+Size, bin = Bin}, 890 {NFD, {ok, B}}; 891 <<_:Skip/binary, Bin/binary>> when byte_size(Bin) > 0 -> 892 NFD = FD#bb{pos = AtPos+byte_size(Bin), bin = <<>>}, 893 {NFD, {ok, Bin}}; 894 _ -> 895 {FD, eof} 896 end. 897 898filename(BB) when is_binary(BB#bb.source) -> 899 BB#bb.source; 900filename(BB) -> 901 list_to_atom(BB#bb.source). 902 903beam_filename(Bin) when is_binary(Bin) -> 904 Bin; 905beam_filename(File) -> 906 filename:rootname(File, ".beam") ++ ".beam". 907 908 909uncompress(Binary0) -> 910 {ok, Fd} = ram_file:open(Binary0, [write, binary]), 911 {ok, _} = ram_file:uncompress(Fd), 912 {ok, Binary} = ram_file:get_file(Fd), 913 ok = ram_file:close(Fd), 914 Binary. 915 916compress(Binary0) -> 917 {ok, Fd} = ram_file:open(Binary0, [write, binary]), 918 {ok, _} = ram_file:compress(Fd), 919 {ok, Binary} = ram_file:get_file(Fd), 920 ok = ram_file:close(Fd), 921 Binary. 922 923%% -> ok | throw(Error) 924assert_directory(FileName) -> 925 case filelib:is_dir(FileName) of 926 true -> 927 ok; 928 false -> 929 error({not_a_directory, FileName}) 930 end. 931 932-spec file_error(file:filename(), {'error',atom()}) -> no_return(). 933 934file_error(FileName, {error, Reason}) -> 935 error({file_error, FileName, Reason}). 936 937-spec error(term()) -> no_return(). 938 939error(Reason) -> 940 throw({error, ?MODULE, Reason}). 941 942%% The following chunks must be kept when stripping a BEAM file. 943 944significant_chunks() -> 945 ["Line" | md5_chunks()]. 946 947%% The following chunks are significant when calculating the MD5 948%% for a module. They are listed in the order that they should be MD5:ed. 949 950md5_chunks() -> 951 ["Atom", "AtU8", "Code", "StrT", "ImpT", "ExpT", "FunT", "LitT"]. 952 953%% The following chunks are mandatory in every Beam file. 954 955mandatory_chunks() -> 956 ["Code", "ExpT", "ImpT", "StrT"]. 957 958%%% ==================================================================== 959%%% The rest of the file handles encrypted debug info. 960%%% 961%%% Encrypting the debug info is only useful if you want to 962%%% have the debug info available all the time (maybe even in a live 963%%% system), but don't want to risk that anyone else but yourself 964%%% can use it. 965%%% ==================================================================== 966 967-record(state, {crypto_key_f :: crypto_fun() | 'undefined'}). 968 969-define(CRYPTO_KEY_SERVER, beam_lib__crypto_key_server). 970 971decrypt_chunk(Type, Module, File, Id, Bin) -> 972 try 973 KeyString = get_crypto_key({debug_info, Type, Module, File}), 974 {Type,Key,IVec,_BlockSize} = make_crypto_key(Type, KeyString), 975 ok = start_crypto(), 976 NewBin = crypto:block_decrypt(Type, Key, IVec, Bin), 977 binary_to_term(NewBin) 978 catch 979 _:_ -> 980 error({key_missing_or_invalid, File, Id}) 981 end. 982 983old_anno_from_term({raw_abstract_v1, Forms}) -> 984 {raw_abstract_v1, anno_from_forms(Forms)}; 985old_anno_from_term({Tag, Forms}) when Tag =:= abstract_v1; 986 Tag =:= abstract_v2 -> 987 try {Tag, anno_from_forms(Forms)} 988 catch 989 _:_ -> 990 {Tag, Forms} 991 end; 992old_anno_from_term(T) -> 993 T. 994 995anno_from_term({debug_info_v1=Tag1, erl_abstract_code=Tag2, {Forms, Opts}}) -> 996 try {Tag1, Tag2, {anno_from_forms(Forms), Opts}} 997 catch 998 _:_ -> 999 {Tag1, Tag2, {Forms, Opts}} 1000 end; 1001anno_from_term(T) -> 1002 T. 1003 1004anno_from_forms(Forms0) -> 1005 %% Forms with record field types created before OTP 19.0 are 1006 %% replaced by well-formed record forms holding the type 1007 %% information. 1008 Forms = epp:restore_typed_record_fields(Forms0), 1009 [erl_parse:anno_from_term(Form) || Form <- Forms]. 1010 1011start_crypto() -> 1012 case crypto:start() of 1013 {error, {already_started, _}} -> 1014 ok; 1015 ok -> 1016 ok 1017 end. 1018 1019get_crypto_key(What) -> 1020 call_crypto_server({get_crypto_key, What}). 1021 1022call_crypto_server(Req) -> 1023 try 1024 gen_server:call(?CRYPTO_KEY_SERVER, Req, infinity) 1025 catch 1026 exit:{noproc,_} -> 1027 %% Not started. 1028 call_crypto_server_1(Req); 1029 exit:{normal,_} -> 1030 %% The process finished just as we called it. 1031 call_crypto_server_1(Req) 1032 end. 1033 1034call_crypto_server_1(Req) -> 1035 case gen_server:start({local,?CRYPTO_KEY_SERVER}, ?MODULE, [], []) of 1036 {ok, _} -> ok; 1037 {error, {already_started, _}} -> ok 1038 end, 1039 erlang:yield(), 1040 call_crypto_server(Req). 1041 1042-spec init([]) -> {'ok', #state{}}. 1043 1044init([]) -> 1045 {ok, #state{}}. 1046 1047-type calls() :: 'clear_crypto_key_fun' 1048 | {'crypto_key_fun', _} 1049 | {'get_crypto_key', _}. 1050 1051-spec handle_call(calls(), {pid(), term()}, #state{}) -> 1052 {'noreply', #state{}} | 1053 {'reply', 'error' | {'error','badfun' | 'exists'}, #state{}} | 1054 {'stop', 'normal', 'undefined' | {'ok', term()}, #state{}}. 1055 1056handle_call({get_crypto_key, _}=R, From, #state{crypto_key_f=undefined}=S) -> 1057 case crypto_key_fun_from_file() of 1058 error -> 1059 {reply, error, S}; 1060 F when is_function(F) -> 1061 %% The init function for the fun has already been called. 1062 handle_call(R, From, S#state{crypto_key_f=F}) 1063 end; 1064handle_call({get_crypto_key, What}, From, #state{crypto_key_f=F}=S) -> 1065 try 1066 Result = F(What), 1067 %% The result may hold information that we don't want 1068 %% lying around. Reply first, then GC, then noreply. 1069 gen_server:reply(From, Result), 1070 erlang:garbage_collect(), 1071 {noreply, S} 1072 catch 1073 _:_ -> 1074 {reply, error, S} 1075 end; 1076handle_call({crypto_key_fun, F}, {_,_} = From, S) -> 1077 case S#state.crypto_key_f of 1078 undefined -> 1079 if is_function(F, 1) -> 1080 {Result, Fun, Reply} = 1081 case catch F(init) of 1082 ok -> 1083 {true, F, ok}; 1084 {ok, F1} when is_function(F1) -> 1085 if 1086 is_function(F1, 1) -> 1087 {true, F1, ok}; 1088 true -> 1089 {false, undefined, 1090 {error, badfun}} 1091 end; 1092 {error, Reason} -> 1093 {false, undefined, {error, Reason}}; 1094 {'EXIT', Reason} -> 1095 {false, undefined, {error, Reason}} 1096 end, 1097 gen_server:reply(From, Reply), 1098 erlang:garbage_collect(), 1099 NewS = case Result of 1100 true -> 1101 S#state{crypto_key_f = Fun}; 1102 false -> 1103 S 1104 end, 1105 {noreply, NewS}; 1106 true -> 1107 {reply, {error, badfun}, S} 1108 end; 1109 OtherF when is_function(OtherF) -> 1110 {reply, {error, exists}, S} 1111 end; 1112handle_call(clear_crypto_key_fun, _From, S) -> 1113 case S#state.crypto_key_f of 1114 undefined -> 1115 {stop,normal,undefined,S}; 1116 F -> 1117 Result = (catch F(clear)), 1118 {stop,normal,{ok,Result},S} 1119 end. 1120 1121-spec handle_cast(term(), #state{}) -> {'noreply', #state{}}. 1122 1123handle_cast(_, State) -> 1124 {noreply, State}. 1125 1126-spec handle_info(term(), #state{}) -> {'noreply', #state{}}. 1127 1128handle_info(_, State) -> 1129 {noreply, State}. 1130 1131-spec code_change(term(), #state{}, term()) -> {'ok', #state{}}. 1132 1133code_change(_OldVsn, State, _Extra) -> 1134 {ok, State}. 1135 1136-spec terminate(term(), #state{}) -> 'ok'. 1137 1138terminate(_Reason, _State) -> 1139 ok. 1140 1141crypto_key_fun_from_file() -> 1142 case init:get_argument(home) of 1143 {ok,[[Home]]} -> 1144 crypto_key_fun_from_file_1([".",Home]); 1145 _ -> 1146 crypto_key_fun_from_file_1(["."]) 1147 end. 1148 1149crypto_key_fun_from_file_1(Path) -> 1150 case f_p_s(Path, ".erlang.crypt") of 1151 {ok, KeyInfo, _} -> 1152 try_load_crypto_fun(KeyInfo); 1153 _ -> 1154 error 1155 end. 1156 1157f_p_s(P, F) -> 1158 case file:path_script(P, F) of 1159 {error, enoent} -> 1160 {error, enoent}; 1161 {error, {Line, _Mod, _Term}=E} -> 1162 error("file:path_script(~tp,~tp): error on line ~p: ~ts~n", 1163 [P, F, Line, file:format_error(E)]), 1164 ok; 1165 {error, E} when is_atom(E) -> 1166 error("file:path_script(~tp,~tp): ~ts~n", 1167 [P, F, file:format_error(E)]), 1168 ok; 1169 Other -> 1170 Other 1171 end. 1172 1173try_load_crypto_fun(KeyInfo) when is_list(KeyInfo) -> 1174 T = ets:new(keys, [private, set]), 1175 foreach( 1176 fun({debug_info, Mode, M, Key}) when is_atom(M) -> 1177 ets:insert(T, {{debug_info,Mode,M,[]}, Key}); 1178 ({debug_info, Mode, [], Key}) -> 1179 ets:insert(T, {{debug_info, Mode, [], []}, Key}); 1180 (Other) -> 1181 error("unknown key: ~p~n", [Other]) 1182 end, KeyInfo), 1183 fun({debug_info, Mode, M, F}) -> 1184 alt_lookup_key( 1185 [{debug_info,Mode,M,F}, 1186 {debug_info,Mode,M,[]}, 1187 {debug_info,Mode,[],[]}], T); 1188 (clear) -> 1189 ets:delete(T); 1190 (_) -> 1191 error 1192 end; 1193try_load_crypto_fun(KeyInfo) -> 1194 error("unrecognized crypto key info: ~p\n", [KeyInfo]). 1195 1196alt_lookup_key([H|T], Tab) -> 1197 case ets:lookup(Tab, H) of 1198 [] -> 1199 alt_lookup_key(T, Tab); 1200 [{_, Val}] -> 1201 Val 1202 end; 1203alt_lookup_key([], _) -> 1204 error. 1205 1206error(Fmt, Args) -> 1207 error_logger:error_msg(Fmt, Args), 1208 error. 1209