Add new AtU8 beam chunk

The new chunk stores atoms encoded in UTF-8.

beam_lib has also been modified to handle the new
'utf8_atoms' attribute while the 'atoms' attribute
may be a missing chunk from now on.

The binary_to_atom/2 BIF can now encode any utf8
binary with up to 255 characters.

The list_to_atom/1 BIF can now accept codepoints
higher than 255 with up to 255 characters (thanks
to Björn Gustavsson).

1 files changed, 25 insertions, 6 deletions

diff --git a/lib/compiler/test/compile_SUITE.erl b/lib/compiler/test/compile_SUITE.erl
index 8c09414a52..8d7facd727 100644
--- a/lib/compiler/test/compile_SUITE.erl
+++ b/lib/compiler/test/compile_SUITE.erl
@@ -30,7 +30,7 @@
 	 file_1/1, forms_2/1, module_mismatch/1, big_file/1, outdir/1,
 	 binary/1, makedep/1, cond_and_ifdef/1, listings/1, listings_big/1,
 	 other_output/1, kernel_listing/1, encrypted_abstr/1,
-	 strict_record/1,
+	 strict_record/1, utf8_atoms/1,
 	 cover/1, env/1, core/1,
 	 core_roundtrip/1, asm/1, optimized_guards/1,
 	 sys_pre_attributes/1, dialyzer/1,
@@ -48,7 +48,7 @@ all() ->
     [app_test, appup_test, file_1, forms_2, module_mismatch, big_file, outdir,
      binary, makedep, cond_and_ifdef, listings, listings_big,
      other_output, kernel_listing, encrypted_abstr,
-     strict_record,
+     strict_record, utf8_atoms,
      cover, env, core, core_roundtrip, asm, optimized_guards,
      sys_pre_attributes, dialyzer, warnings, pre_load_check,
      env_compiler_options].
@@ -450,8 +450,10 @@ do_kernel_listing({M,A}) ->
     try
 	{ok,M,Kern} = compile:forms(A, [to_kernel]),
 	IoList = v3_kernel_pp:format(Kern),
-	_ = iolist_size(IoList),
-	ok
+	case unicode:characters_to_binary(IoList) of
+	    Bin when is_binary(Bin) ->
+		ok
+	end
     catch
 	throw:{error,Error} ->
 	    io:format("*** compilation failure '~p' for module ~s\n",
@@ -680,6 +682,23 @@ test_sloppy() ->
     {1,2} = record_access:test(Turtle),
     Turtle.
 
+utf8_atoms(Config) when is_list(Config) ->
+    Anno = erl_anno:new(1),
+    Atom = binary_to_atom(<<"こんにちは"/utf8>>, utf8),
+    Forms = [{attribute,Anno,compile,[export_all]},
+	     {function,Anno,atom,0,[{clause,Anno,[],[],[{atom,Anno,Atom}]}]}],
+
+    Utf8AtomForms = [{attribute,Anno,module,utf8_atom}|Forms],
+    {ok,utf8_atom,Utf8AtomBin} =
+	compile:forms(Utf8AtomForms, [binary]),
+    {ok,{utf8_atom,[{atoms,_}]}} =
+	beam_lib:chunks(Utf8AtomBin, [atoms]),
+    code:load_binary(utf8_atom, "compile_SUITE", Utf8AtomBin),
+    Atom = utf8_atom:atom(),
+
+    NoUtf8AtomForms = [{attribute,Anno,module,no_utf8_atom}|Forms],
+    error = compile:forms(NoUtf8AtomForms, [binary, r19]).
+
 env(Config) when is_list(Config) ->
     {Simple,Target} = get_files(Config, simple, env),
     {ok,Cwd} = file:get_cwd(),
@@ -751,7 +770,7 @@ do_core_1(M, A, Outdir) ->
     {ok,M,Core0} = compile:forms(A, [to_core]),
     CoreFile = filename:join(Outdir, atom_to_list(M)++".core"),
     CorePP = core_pp:format(Core0),
-    ok = file:write_file(CoreFile, CorePP),
+    ok = file:write_file(CoreFile, unicode:characters_to_binary(CorePP)),
 
     %% Parse the .core file and return the result as Core Erlang Terms.
     Core = case compile:file(CoreFile, [report_errors,from_core,no_copt,to_core,binary]) of
@@ -823,7 +842,7 @@ do_core_roundtrip_1(Mod, Abstr, Outdir) ->
 do_core_roundtrip_2(M, Core0, Outdir) ->
     CoreFile = filename:join(Outdir, atom_to_list(M)++".core"),
     CorePP = core_pp:format_all(Core0),
-    ok = file:write_file(CoreFile, CorePP),
+    ok = file:write_file(CoreFile, unicode:characters_to_binary(CorePP)),
 
     %% Parse the .core file and return the result as Core Erlang Terms.
     Core2 = case compile:file(CoreFile, [report_errors,from_core,