Merge pull request #87 from aeternity/PT-166636909-avoid-calldata-collision

Pt 166636909 avoid calldata collision

.gitignore

@@ -1,5 +1,5 @@
 .rebar3
-_*
+_[^_]*
 .eunit
 *.o
 *.beam

src/aeso_compiler.erl

@@ -188,7 +188,7 @@ check_call1(ContractString0, FunName, Args, Options) ->
             aevm ->
                 %% First check the contract without the __call function
                 #{} = string_to_icode(ContractString0, Options),
-        ContractString = insert_call_function(ContractString0, FunName, Args, Options),
+                ContractString = insert_call_function(ContractString0, ?CALL_NAME, FunName, Args, Options),
                 #{typed_ast := TypedAst,
                   icode     := Icode} = string_to_icode(ContractString, Options),
                 {ok, {FunName, {fun_t, _, _, ArgTypes, RetType}}} = get_call_type(TypedAst),
@@ -211,13 +211,13 @@ check_call1(ContractString0, FunName, Args, Options) ->
                 %% First check the contract without the __call function
                 #{fcode := OrgFcode} = string_to_fcode(ContractString0, Options),
                 FateCode = aeso_fcode_to_fate:compile(OrgFcode, []),
-                _SymbolHashes = maps:keys(aeb_fate_code:symbols(FateCode)),
-                %% TODO collect all hashes and compute the first name without hash collision to
-                %% be used as __callX
-                %% case aeb_fate_code:symbol_identifier(<<"__call">>) of
-                ContractString = insert_call_function(ContractString0, FunName, Args, Options),
+                %% collect all hashes and compute the first name without hash collision to
+                SymbolHashes = maps:keys(aeb_fate_code:symbols(FateCode)),
+                CallName = first_none_match(?CALL_NAME, SymbolHashes,
+                                            lists:seq($1, $9) ++ lists:seq($A, $Z) ++ lists:seq($a, $z)),
+                ContractString = insert_call_function(ContractString0, CallName, FunName, Args, Options),
                 #{fcode := Fcode} = string_to_fcode(ContractString, Options),
-                #{args := CallArgs} = maps:get({entrypoint, <<"__call">>}, maps:get(functions, Fcode)),
+                CallArgs = arguments_of_body(CallName, FunName, Fcode),
                 {ok, FunName, CallArgs}
         end
     catch
@@ -233,17 +233,32 @@ check_call1(ContractString0, FunName, Args, Options) ->
                                 fun (E) -> io_lib:format("~p", [E]) end)}
     end.
 
+arguments_of_body(CallName, _FunName, Fcode) ->
+    #{body := Body} = maps:get({entrypoint, list_to_binary(CallName)}, maps:get(functions, Fcode)),
+    {def, _FName, Args} = Body,
+    %% FName is either {entrypoint, list_to_binary(FunName)} or 'init'
+    [ aeso_fcode_to_fate:term_to_fate(A) || A <- Args ].
+
+first_none_match(_CallName, _Hashes, []) ->
+    error(unable_to_find_unique_call_name);
+first_none_match(CallName, Hashes, [Char|Chars]) ->
+    case not lists:member(aeb_fate_code:symbol_identifier(list_to_binary(CallName)), Hashes) of
+        true ->
+            CallName;
+        false ->
+            first_none_match(?CALL_NAME++[Char], Hashes, Chars)
+    end.
 
 %% Add the __call function to a contract.
--spec insert_call_function(string(), string(), [string()], options()) -> string().
-insert_call_function(Code, FunName, Args, Options) ->
+-spec insert_call_function(string(), string(), string(), [string()], options()) -> string().
+insert_call_function(Code, Call, FunName, Args, Options) ->
     Ast = parse(Code, Options),
     Ind = last_contract_indent(Ast),
     lists:flatten(
         [ Code,
           "\n\n",
           lists:duplicate(Ind, " "),
-          "stateful function __call() = ", FunName, "(", string:join(Args, ","), ")\n"
+          "stateful function ", Call,"() = ", FunName, "(", string:join(Args, ","), ")\n"
         ]).
 
 -spec insert_init_function(string(), options()) -> string().

src/aeso_fcode_to_fate.erl

@@ -9,7 +9,7 @@
 %%%-------------------------------------------------------------------
 -module(aeso_fcode_to_fate).
 
--export([compile/2]).
+-export([compile/2, term_to_fate/1]).
 
 %% -- Preamble ---------------------------------------------------------------
 
@@ -231,16 +231,36 @@ lookup_var(#env{vars = Vars}, X) ->
 
 %% -- The compiler --
 
-to_scode(_Env, {lit, L}) ->
+lit_to_fate(L) ->
      case L of
-        {int, N}             -> [push(?i(N))];
-        {string, S}          -> [push(?i(aeb_fate_data:make_string(S)))];
-        {bool, B}            -> [push(?i(B))];
-        {account_pubkey, K}  -> [push(?i(aeb_fate_data:make_address(K)))];
-        {contract_pubkey, K} -> [push(?i(aeb_fate_data:make_contract(K)))];
-        {oracle_pubkey, K}   -> [push(?i(aeb_fate_data:make_oracle(K)))];
+        {int, N}             -> aeb_fate_data:make_integer(N);
+        {string, S}          -> aeb_fate_data:make_string(S);
+        {bool, B}            -> aeb_fate_data:make_boolean(B);
+        {account_pubkey, K}  -> aeb_fate_data:make_address(K);
+        {contract_pubkey, K} -> aeb_fate_data:make_contract(K);
+        {oracle_pubkey, K}   -> aeb_fate_data:make_oracle(K);
         {oracle_query_id, _} -> ?TODO(fate_oracle_query_id_value)
-    end;
+     end.
+
+term_to_fate({lit, L}) ->
+    lit_to_fate(L);
+%% negative literals are parsed as 0 - N
+term_to_fate({op, '-', [{lit, {int, 0}}, {lit, {int, N}}]}) ->
+    aeb_fate_data:make_integer(-N);
+term_to_fate(nil) ->
+    aeb_fate_data:make_list([]);
+term_to_fate({op, '::', [Hd, Tl]}) ->
+    %% The Tl will translate into a list, because FATE lists are just lists
+    [term_to_fate(Hd) | term_to_fate(Tl)];
+term_to_fate({tuple, As}) ->
+    aeb_fate_data:make_tuple(list_to_tuple([ term_to_fate(A) || A<-As]));
+term_to_fate({con, Ar, I, As}) ->
+    FateAs = [ term_to_fate(A) || A <- As ],
+    aeb_fate_data:make_variant(Ar, I, list_to_tuple(FateAs)).
+
+
+to_scode(_Env, {lit, L}) ->
+    [push(?i(lit_to_fate(L)))];
 
 to_scode(_Env, nil) ->
     [aeb_fate_ops:nil(?a)];

test/aeso_calldata_tests.erl

@@ -0,0 +1,78 @@
+%%% -*- erlang-indent-level:4; indent-tabs-mode: nil -*-
+%%%-------------------------------------------------------------------
+%%% @copyright (C) 2019, Aeternity Anstalt
+%%% @doc Test Sophia language compiler.
+%%%
+%%% @end
+%%%-------------------------------------------------------------------
+
+-module(aeso_calldata_tests).
+
+-compile([export_all, nowarn_export_all]).
+
+-include_lib("eunit/include/eunit.hrl").
+
+%%  Very simply test compile the given contracts. Only basic checks
+%%  are made on the output, just that it is a binary which indicates
+%%  that the compilation worked.
+calldata_test_() ->
+     [ {"Testing the " ++ ContractName ++ " contract with the " ++ atom_to_list(Backend) ++ " backend",
+        fun() ->
+            ContractString = aeso_test_utils:read_contract(ContractName),
+            Res = aeso_compiler:create_calldata(ContractString, Fun, Args, [{backend, Backend}]),
+            case Backend of
+                aevm ->
+                    ?assertMatch({ok, _, _, _}, Res);
+                fate ->
+                    ?assertMatch({ok, _}, Res)
+            end
+        end} || {ContractName, Fun, Args} <- compilable_contracts(), Backend <- [aevm, fate],
+                not lists:member(ContractName, not_yet_compilable(Backend))].
+
+check_errors(Expect, ErrorString) ->
+    %% This removes the final single \n as well.
+    Actual = binary:split(<<ErrorString/binary,$\n>>, <<"\n\n">>, [global,trim]),
+    case {Expect -- Actual, Actual -- Expect} of
+        {[], Extra}   -> ?assertMatch({unexpected, []}, {unexpected, Extra});
+        {Missing, []} -> ?assertMatch({missing, []}, {missing, Missing});
+        {Missing, Extra} -> ?assertEqual(Missing, Extra)
+    end.
+
+%% compilable_contracts() -> [ContractName].
+%%  The currently compilable contracts.
+
+compilable_contracts() ->
+    [
+     {"identity", "init", []},
+     {"maps", "init", []},
+     {"oracles", "init", []},
+     {"variant_types", "init", []},
+     {"basic_auth", "init", []},
+     {"address_literals", "init", []},
+     {"bytes_equality", "init", []},
+     {"address_chain", "init", []},
+     {"counter", "init",
+      ["-3334353637383940202122232425262728293031323334353637"]},
+     {"dutch_auction", "init",
+      ["ak_2gx9MEFxKvY9vMG5YnqnXWv1hCsX7rgnfvBLJS4aQurustR1rt", "200000", "1000"]},
+     {"maps", "fromlist_i",
+      ["[(1, {x = 1, y = 2}), (2, {x = 3, y = 4}), (3, {x = 4, y = 4})]"]},
+     {"strings", "str_concat", ["\"test\"","\"me\""]},
+     {"complex_types", "filter_some", ["[Some(1), Some(2), None]"]},
+     {"complex_types", "init", ["ct_Ez6MyeTMm17YnTnDdHTSrzMEBKmy7Uz2sXu347bTDPgVH2ifJ"]},
+     {"__call" "init", []},
+     {"bitcoin_auth", "init",
+      ["#0102030405060708090a0b0c0d0e0f1017181920212223242526272829303132"
+       "33343536373839401a1b1c1d1e1f202122232425262728293031323334353637"]}
+    ].
+
+not_yet_compilable(fate) ->
+    ["oracles",             %% Oracle.register
+     "events",
+     "basic_auth",          %% auth_tx_hash instruction
+     "bitcoin_auth",        %% fate_auth_tx_hash_instruction
+     "address_literals",    %% oracle_query_id literals
+     "address_chain"        %% Oracle.check_query
+    ];
+not_yet_compilable(aevm) ->
+    ["__call"].

test/contracts/__call.aes

@@ -0,0 +1,5 @@
+
+contract Identity =
+  function main (x:int) = x
+
+  function __call() = 12