diff options
Diffstat (limited to 'lib/stdlib')
| -rw-r--r-- | lib/stdlib/doc/src/beam_lib.xml | 7 | ||||
| -rw-r--r-- | lib/stdlib/src/beam_lib.erl | 22 |
2 files changed, 21 insertions, 8 deletions
diff --git a/lib/stdlib/doc/src/beam_lib.xml b/lib/stdlib/doc/src/beam_lib.xml index b9286f1402..27308e02f3 100644 --- a/lib/stdlib/doc/src/beam_lib.xml +++ b/lib/stdlib/doc/src/beam_lib.xml @@ -347,9 +347,10 @@ chunkref() = chunkname() | chunkid()</code> </type> <desc> <p>Compares the contents of two BEAM files. If the module names - are the same, and the chunks with the identifiers - <c>"Code"</c>, <c>"ExpT"</c>, <c>"ImpT"</c>, <c>"StrT"</c>, - and <c>"Atom"</c> have the same contents in both files, + are the same, and all chunks except for the <c>"CInf"</c> chunk + (the chunk containing the compilation information which is + returned by <c>Module:module_info(compile)</c>) + have the same contents in both files, <c>ok</c> is returned. Otherwise an error message is returned.</p> </desc> </func> diff --git a/lib/stdlib/src/beam_lib.erl b/lib/stdlib/src/beam_lib.erl index 820afd3739..0f853daafc 100644 --- a/lib/stdlib/src/beam_lib.erl +++ b/lib/stdlib/src/beam_lib.erl @@ -331,13 +331,11 @@ beam_files(Dir) -> %% -> ok | throw(Error) cmp_files(File1, File2) -> - {ok, {M1, L1}} = read_significant_chunks(File1), - {ok, {M2, L2}} = read_significant_chunks(File2), + {ok, {M1, L1}} = read_all_but_useless_chunks(File1), + {ok, {M2, L2}} = read_all_but_useless_chunks(File2), if M1 =:= M2 -> - List1 = filter_funtab(L1), - List2 = filter_funtab(L2), - cmp_lists(List1, List2); + cmp_lists(L1, L2); true -> error({modules_different, M1, M2}) end. @@ -408,6 +406,20 @@ pad(Size) -> end. %% -> {ok, {Module, Chunks}} | throw(Error) +read_all_but_useless_chunks(File0) when is_atom(File0); + is_list(File0); + is_binary(File0) -> + File = beam_filename(File0), + {ok, Module, ChunkIds0} = scan_beam(File, info), + ChunkIds = [Name || {Name,_,_} <- ChunkIds0, + not is_useless_chunk(Name)], + {ok, Module, Chunks} = scan_beam(File, ChunkIds), + {ok, {Module, lists:reverse(Chunks)}}. + +is_useless_chunk("CInf") -> true; +is_useless_chunk(_) -> false. + +%% -> {ok, {Module, Chunks}} | throw(Error) read_significant_chunks(File) -> case read_chunk_data(File, significant_chunks(), [allow_missing_chunks]) of {ok, {Module, Chunks0}} -> |