%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2004-2010. 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/.
%%
%% 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.
%%
%% %CopyrightEnd%
%%
-module(beam_validator_SUITE).

-export([all/1,init_per_testcase/2,fin_per_testcase/2,
	 beam_files/1,compiler_bug/1,stupid_but_valid/1,
	 xrange/1,yrange/1,stack/1,call_last/1,merge_undefined/1,
	 uninit/1,unsafe_catch/1,
	 dead_code/1,mult_labels/1,
	 overwrite_catchtag/1,overwrite_trytag/1,accessing_tags/1,bad_catch_try/1,
	 cons_guard/1,
	 freg_range/1,freg_uninit/1,freg_state/1,
	 bin_match/1,bin_aligned/1,bad_dsetel/1,
	 state_after_fault_in_catch/1,no_exception_in_catch/1,
	 undef_label/1,illegal_instruction/1,failing_gc_guard_bif/1]).
	 
-include("test_server.hrl").

init_per_testcase(Case, Config) when is_atom(Case), is_list(Config) ->
    Dog = test_server:timetrap(?t:minutes(10)),
    [{watchdog,Dog}|Config].

fin_per_testcase(Case, Config) when is_atom(Case), is_list(Config) ->
    Dog = ?config(watchdog, Config),
    ?t:timetrap_cancel(Dog),
    ok.

all(suite) ->
    test_lib:recompile(?MODULE),
    [beam_files,compiler_bug,stupid_but_valid,
     xrange,yrange,stack,call_last,merge_undefined,
     uninit,unsafe_catch,
     dead_code,mult_labels,
     overwrite_catchtag,overwrite_trytag,accessing_tags,bad_catch_try,
     cons_guard,
     freg_range,freg_uninit,freg_state,
     bin_match,bin_aligned,
     bad_dsetel,state_after_fault_in_catch,no_exception_in_catch,
     undef_label,illegal_instruction,failing_gc_guard_bif].

beam_files(Config) when is_list(Config) ->
    ?line {ok,Cwd} = file:get_cwd(),
    ?line Parent = filename:dirname(Cwd),
    ?line Wc = filename:join([Parent,"*","*.beam"]),
    %% Must have at least two files here, or there will be
    %% a grammatical error in the output of the io:format/2 call below. ;-)
    ?line [_,_|_] = Fs = filelib:wildcard(Wc),
    ?line io:format("~p files\n", [length(Fs)]),
    beam_files_1(Fs, 0).

beam_files_1([F|Fs], Errors) ->
    ?line case beam_validator:file(F) of
	      ok ->
		  beam_files_1(Fs, Errors);
	      {error,Es} ->
		  io:format("File:  ~s", [F]),
		  io:format("Error: ~p\n", [Es]),
		  beam_files_1(Fs, Errors+1)
	  end;
beam_files_1([], 0) -> ok;
beam_files_1([], Errors) ->
    ?line io:format("~p error(s)", [Errors]),
    ?line ?t:fail().

compiler_bug(Config) when is_list(Config) ->
    %% Check that the compiler returns an error if we try to
    %% assemble one of the bad '.S' files.
    ?line Data = ?config(data_dir, Config),
    ?line File = filename:join(Data, "stack"),
    ?line error = compile:file(File, [asm,report_errors,binary,time]),
    ok.

%% The following code is stupid but it should compile.
stupid_but_valid(Config) when is_list(Config) ->
    AnAtom = nisse,
    ?line try setelement(5, setelement(6, AnAtom, value), another_value) of
	      Term -> ?line ?t:fail({what_happened,Term})
	  catch
	      error:badarg -> ok
	  end,
    ok.

xrange(Config) when is_list(Config) ->
    Errors = do_val(xrange, Config),
    ?line
	[{{t,sum_1,2},
	  {{bif,'+',{f,0},[{x,-1},{x,1}],{x,0}},4,
	   {uninitialized_reg,{x,-1}}}},
	 {{t,sum_2,2},
	  {{bif,'+',{f,0},[{x,0},{x,1024}],{x,0}},4,
	   {uninitialized_reg,{x,1024}}}},
	 {{t,sum_3,2},
	  {{bif,'+',{f,0},[{x,0},{x,1}],{x,-1}},4,
	   {invalid_store,{x,-1},number}}},
	 {{t,sum_4,2},
	  {{bif,'+',{f,0},[{x,0},{x,1}],{x,1024}},4,limit}}] = Errors,
    ok.

yrange(Config) when is_list(Config) ->
    Errors = do_val(yrange, Config),
    ?line
	[{{t,sum_1,2},
	  {{move,{x,1},{y,-1}},5,
	   {invalid_store,{y,-1},term}}},
	 {{t,sum_2,2},
	  {{bif,'+',{f,0},[{x,0},{y,1024}],{x,0}},8,
	   {uninitialized_reg,{y,1024}}}},
	 {{t,sum_3,2},
	  {{move,{x,1},{y,1024}},5,limit}},
	 {{t,sum_4,2},
	  {{move,{x,1},{y,-1}},5,
	   {invalid_store,{y,-1},term}}}] = Errors,
    ok.

stack(Config) when is_list(Config) ->
    Errors = do_val(stack, Config),
    ?line [{{t,a,2},{return,11,{stack_frame,2}}},
	   {{t,b,2},{{deallocate,2},4,{allocated,none}}},
	   {{t,c,2},{{deallocate,2},12,{allocated,none}}},
	   {{t,d,2},
	    {{allocate,2,2},5,{existing_stack_frame,{size,2}}}},
	   {{t,e,2},{{deallocate,5},6,{allocated,2}}},
	   {{t,bad_1,0},{{allocate_zero,2,10},4,{{x,9},not_live}}},
	   {{t,bad_2,0},{{move,{y,0},{x,0}},5,{unassigned,{y,0}}}}] = Errors,
    ok.

call_last(Config) when is_list(Config) ->
    Errors = do_val(call_last, Config),
    ?line [{{t,a,1},{{call_last,1,{f,8},2},11,{allocated,1}}},
	   {{t,b,1},
	    {{call_ext_last,2,{extfunc,lists,seq,2},2},
	     11,
	     {allocated,1}}}] = Errors,
    ok.

merge_undefined(Config) when is_list(Config) ->
    Errors = do_val(merge_undefined, Config),
    ?line [{{t,handle_call,2},
	    {{call_ext,2,{extfunc,debug,filter,2}},
	     22,
	     {uninitialized_reg,{y,0}}}}] = Errors,
    ok.

uninit(Config) when is_list(Config) ->
    Errors = do_val(uninit, Config),
    ?line
	[{{t,sum_1,2},
	  {{move,{y,0},{x,0}},5,{uninitialized_reg,{y,0}}}},
	 {{t,sum_2,2},
	  {{call,1,{f,10}},6,{uninitialized_reg,{y,0}}}},
	 {{t,sum_3,2},
	  {{bif,'+',{f,0},[{x,0},{y,0}],{x,0}},
	   7,
	   {unassigned,{y,0}}}}] = Errors,
    ok.

unsafe_catch(Config) when is_list(Config) ->
    Errors = do_val(unsafe_catch, Config),
    ?line
	[{{t,small,2},
	  {{bs_put_integer,{f,0},{integer,16},1,
	    {field_flags,[aligned,unsigned,big]},{y,0}},
	   20,
	   {unassigned,{y,0}}}}] = Errors,
    ok.

dead_code(Config) when is_list(Config) ->
    [] = do_val(dead_code, Config),
    ok.

mult_labels(Config) when is_list(Config) ->
    [] = do_val(erl_prim_loader, Config, ".beam"),
    ok.

overwrite_catchtag(Config) when is_list(Config) ->
    Errors = do_val(overwrite_catchtag, Config),
    ?line
	[{{overwrite_catchtag,foo,1},
	  {{move,{x,0},{y,0}},6,{catchtag,_}}}] = Errors,
    ok.

overwrite_trytag(Config) when is_list(Config) ->
    Errors = do_val(overwrite_trytag, Config),
    ?line
	[{{overwrite_trytag,foo,1},
	  {{kill,{y,2}},9,{trytag,_}}}] = Errors,
    ok.

accessing_tags(Config) when is_list(Config) ->
    Errors = do_val(accessing_tags, Config),
    ?line
	[{{accessing_tags,foo,1},
	  {{move,{y,0},{x,0}},6,{catchtag,_}}},
	 {{accessing_tags,bar,1},
	  {{move,{y,0},{x,0}},6,{trytag,_}}}] = Errors,
    ok.

bad_catch_try(Config) when is_list(Config) ->
    Errors = do_val(bad_catch_try, Config),
    ?line [{{bad_catch_try,bad_1,1},
	    {{'catch',{x,0},{f,3}},
	     5,{invalid_store,{x,0},{catchtag,[3]}}}},
	   {{bad_catch_try,bad_2,1},
	    {{catch_end,{x,9}},
	     8,{source_not_y_reg,{x,9}}}},
	   {{bad_catch_try,bad_3,1},
	    {{catch_end,{y,1}},9,{bad_type,{atom,kalle}}}},
	   {{bad_catch_try,bad_4,1},
	    {{'try',{x,0},{f,15}},5,{invalid_store,{x,0},{trytag,[15]}}}},
	   {{bad_catch_try,bad_5,1},
	    {{try_case,{y,1}},12,{bad_type,term}}},
	   {{bad_catch_try,bad_6,1},
	    {{try_end,{y,1}},8,{bad_type,{integer,1}}}}] = Errors,
    ok.

cons_guard(Config) when is_list(Config) ->
    Errors = do_val(cons, Config),
    ?line
	[{{cons,foo,1},
	  {{get_list,{x,0},{x,1},{x,2}},
	   5,
	   {bad_type,{needed,cons},{actual,term}}}}] = Errors,
    ok.

freg_range(Config) when is_list(Config) ->
    Errors = do_val(freg_range, Config),
    ?line 
	[{{t,sum_1,2},
	  {{bif,fadd,{f,0},[{fr,-1},{fr,1}],{fr,0}},
	   5,
	   {bad_source,{fr,-1}}}},
	 {{t,sum_2,2},
	  {{bif,fadd,{f,0},[{fr,0},{fr,1024}],{fr,0}},
	   6,
	   {uninitialized_reg,{fr,1024}}}},
	 {{t,sum_3,2},
	  {{bif,fadd,{f,0},[{fr,0},{fr,1}],{fr,-1}},
	   7,
	   {bad_target,{fr,-1}}}},
	 {{t,sum_4,2},
	  {{bif,fadd,{f,0},[{fr,0},{fr,1}],{fr,1024}},
	   7,
	   limit}}] = Errors,
    ok.

freg_uninit(Config) when is_list(Config) ->
    Errors = do_val(freg_uninit, Config),
    ?line 
	[{{t,sum_1,2},
	  {{bif,fadd,{f,0},[{fr,0},{fr,1}],{fr,0}},
	   6,
	   {uninitialized_reg,{fr,1}}}},
	 {{t,sum_2,2},
	  {{bif,fadd,{f,0},[{fr,0},{fr,1}],{fr,0}},
	   9,
	   {uninitialized_reg,{fr,0}}}}] = Errors,
    ok.

freg_state(Config) when is_list(Config) ->
    Errors = do_val(freg_state, Config),
    ?line
	[{{t,sum_1,2},
	  {{bif,fmul,{f,0},[{fr,0},{fr,1}],{fr,0}},
	   6,
	   {bad_floating_point_state,undefined}}},
	 {{t,sum_2,2},
	  {{fmove,{fr,0},{x,0}},
	   8,
	   {bad_floating_point_state,cleared}}},
	 {{t,sum_3,2},
	  {{bif,'-',{f,0},[{x,1},{x,0}],{x,1}},
	   8,
	   {unsafe_instruction,{float_error_state,cleared}}}},
	 {{t,sum_4,2},
	  {{fcheckerror,{f,0}},
	   4,
	   {bad_floating_point_state,undefined}}},
	 {{t,sum_5,2},
	  {fclearerror,5,{bad_floating_point_state,cleared}}}] = Errors,
    ok.

bin_match(Config) when is_list(Config) ->
    Errors = do_val(bin_match, Config),
    ?line
	[{{t,t,1},{{bs_save,0},4,no_bs_match_state}},
	 {{t,x,1},{{bs_restore,1},16,{no_save_point,1}}}] = Errors,
    ok.

bin_aligned(Config) when is_list(Config) ->
    Errors = do_val(bin_aligned, Config),
    ?line
	[{{t,decode,1},
	  {{bs_put_integer,{f,0},
	    {integer,5},
	    1,
	    {field_flags,[unsigned,big,aligned]},
	    {integer,0}},
	   10,
	   {aligned_flag_set,{bits,3}}}}] = Errors,
    ok.

bad_dsetel(Config) when is_list(Config) ->
    Errors = do_val(bad_dsetel, Config),
    ?line
	[{{t,t,1},
	  {{set_tuple_element,{x,1},{x,0},1},
	   15,
	   illegal_context_for_set_tuple_element}}] = Errors,
    ok.

state_after_fault_in_catch(Config) when is_list(Config) ->
    Errors = do_val(state_after_fault_in_catch, Config),
    [{{t,foo,1},
      {{move,{x,1},{x,0}},10,{uninitialized_reg,{x,1}}}},
     {{state_after_fault_in_catch,if_end,1},
      {{move,{x,1},{x,0}},9,{uninitialized_reg,{x,1}}}},
     {{state_after_fault_in_catch,case_end,1},
      {{move,{x,1},{x,0}},9,{uninitialized_reg,{x,1}}}},
     {{state_after_fault_in_catch,badmatch,1},
      {{move,{x,1},{x,0}},9,{uninitialized_reg,{x,1}}}}] = Errors,
    ok.

no_exception_in_catch(Config) when is_list(Config) ->
    Errors = do_val(no_exception_in_catch, Config),
    [{{no_exception_in_catch,nested_of_1,4},
      {{move,{x,3},{x,0}},91,{uninitialized_reg,{x,3}}}}] = Errors,
    ok.

undef_label(Config) when is_list(Config) ->
    Errors = do_val(undef_label, Config),
    [{{undef_label,t,1},{undef_labels,[42]}},
     {{undef_label,x,1},{return,4,no_entry_label}}] = Errors,
    ok.

illegal_instruction(Config) when is_list(Config) ->
    Errors = do_val(illegal_instruction, Config),
    [{{illegal_instruction,t,1},
      {{my_illegal_instruction,{x,0}},4,unknown_instruction}},
     {{'_',x,1},{bad_func_info,1,illegal_instruction}},
     {{'_',y,0},{[],0,illegal_instruction}}] = Errors,
    ok.

%% The beam_validator used to assume that a GC guard BIF could
%% do a garbage collection even if it failed. That assumption
%% is not correct, and will cause the beam_validator to reject
%% valid programs such as this test case.
%%
%% (Thanks to Kiran Khaladkar.)
%%
failing_gc_guard_bif(Config) when is_list(Config) ->
    ?line ok = process_request(lists:seq(1, 36)),
    ?line error = process_request([]),
    ?line error = process_request(not_a_list),
    ok.

process_request(ConfId) ->
    case process_request_foo(ConfId) of
	false ->
	    if
		length(ConfId) == 36 ->
		    Response = ok;
		true ->
		    Response = error
	    end
    end,
    process_request_bar(self(), [Response]).

process_request_foo(_) ->
    false.

process_request_bar(Pid, [Response]) when is_pid(Pid) ->
    Response.


%%%-------------------------------------------------------------------------

do_val(Name, Config) ->
    do_val(Name, Config, ".S").

do_val(Name, Config, Type) ->
    ?line Data = ?config(data_dir, Config),
    ?line File = filename:join(Data, atom_to_list(Name)++Type),
    ?line case beam_validator:file(File) of
	      {error,Errors} ->
		  ?line io:format("~p:~n~s", 
				  [File,beam_validator:format_error(Errors)]),
		  Errors;
	      ok -> []
	  end.
