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-rw-r--r--erts/emulator/beam/beam_bp.c3
-rw-r--r--erts/emulator/beam/beam_load.c147
-rw-r--r--erts/emulator/beam/ops.tab12
-rw-r--r--erts/emulator/test/bif_SUITE.erl281
4 files changed, 362 insertions, 81 deletions
diff --git a/erts/emulator/beam/beam_bp.c b/erts/emulator/beam/beam_bp.c
index dd13cd179a..53f283ba39 100644
--- a/erts/emulator/beam/beam_bp.c
+++ b/erts/emulator/beam/beam_bp.c
@@ -486,7 +486,8 @@ erts_find_local_func(Eterm mfa[3]) {
for (i = 0; i < n; ++i) {
code_ptr = code_base[MI_FUNCTIONS+i];
ASSERT(((BeamInstr) BeamOp(op_i_func_info_IaaI)) == code_ptr[0]);
- ASSERT(mfa[0] == ((Eterm) code_ptr[2]));
+ ASSERT(mfa[0] == ((Eterm) code_ptr[2]) ||
+ is_nil((Eterm) code_ptr[2]));
if (mfa[1] == ((Eterm) code_ptr[3]) &&
((BeamInstr) mfa[2]) == code_ptr[4]) {
return code_ptr + 5;
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c
index dd788df6e4..d54fe603d8 100644
--- a/erts/emulator/beam/beam_load.c
+++ b/erts/emulator/beam/beam_load.c
@@ -507,6 +507,7 @@ static int verify_chunks(LoaderState* stp);
static int load_atom_table(LoaderState* stp);
static int load_import_table(LoaderState* stp);
static int read_export_table(LoaderState* stp);
+static int is_bif(Eterm mod, Eterm func, unsigned arity);
static int read_lambda_table(LoaderState* stp);
static int read_literal_table(LoaderState* stp);
static int read_line_table(LoaderState* stp);
@@ -666,7 +667,7 @@ erts_prepare_loading(LoaderState* stp, Process *c_p, Eterm group_leader,
/*
* Initialize code area.
*/
- stp->code_buffer_size = erts_next_heap_size(2048 + stp->num_functions, 0);
+ stp->code_buffer_size = 2048 + stp->num_functions;
stp->code = (BeamInstr *) erts_alloc(ERTS_ALC_T_CODE,
sizeof(BeamInstr) * stp->code_buffer_size);
@@ -1218,8 +1219,7 @@ load_atom_table(LoaderState* stp)
GetInt(stp, 4, stp->num_atoms);
stp->num_atoms++;
stp->atom = erts_alloc(ERTS_ALC_T_LOADER_TMP,
- erts_next_heap_size((stp->num_atoms*sizeof(Eterm)),
- 0));
+ stp->num_atoms*sizeof(Eterm));
/*
* Read all atoms.
@@ -1264,9 +1264,7 @@ load_import_table(LoaderState* stp)
GetInt(stp, 4, stp->num_imports);
stp->import = erts_alloc(ERTS_ALC_T_LOADER_TMP,
- erts_next_heap_size((stp->num_imports *
- sizeof(ImportEntry)),
- 0));
+ stp->num_imports * sizeof(ImportEntry));
for (i = 0; i < stp->num_imports; i++) {
int n;
Eterm mod;
@@ -1315,16 +1313,8 @@ load_import_table(LoaderState* stp)
static int
read_export_table(LoaderState* stp)
{
- static struct {
- Eterm mod;
- Eterm func;
- int arity;
- } allow_redef[] = {
- /* The BIFs that are allowed to be redefined by Erlang code */
- {am_erlang,am_apply,2},
- {am_erlang,am_apply,3},
- };
int i;
+ BeamInstr* address;
GetInt(stp, 4, stp->num_exps);
if (stp->num_exps > stp->num_functions) {
@@ -1340,7 +1330,6 @@ read_export_table(LoaderState* stp)
Uint value;
Eterm func;
Uint arity;
- Export* e;
GetInt(stp, 4, n);
GetAtom(stp, n, func);
@@ -1358,29 +1347,34 @@ read_export_table(LoaderState* stp)
if (value == 0) {
LoadError2(stp, "export table entry %d: label %d not resolved", i, n);
}
- stp->export[i].address = stp->code + value;
+ stp->export[i].address = address = stp->code + value;
/*
- * Check that we are not redefining a BIF (except the ones allowed to
- * redefine).
+ * Find out if there is a BIF with the same name.
*/
- if ((e = erts_find_export_entry(stp->module, func, arity)) != NULL) {
- if (e->code[3] == (BeamInstr) em_apply_bif) {
- int j;
- for (j = 0; j < sizeof(allow_redef)/sizeof(allow_redef[0]); j++) {
- if (stp->module == allow_redef[j].mod &&
- func == allow_redef[j].func &&
- arity == allow_redef[j].arity) {
- break;
- }
- }
- if (j == sizeof(allow_redef)/sizeof(allow_redef[0])) {
- LoadError2(stp, "exported function %T/%d redefines BIF",
- func, arity);
- }
- }
+ if (!is_bif(stp->module, func, arity)) {
+ continue;
+ }
+
+ /*
+ * This is a stub for a BIF.
+ *
+ * It should not be exported, and the information in its
+ * func_info instruction should be invalidated so that it
+ * can be filtered out by module_info(functions) and by
+ * any other functions that walk through all local functions.
+ */
+
+ if (stp->labels[n].patches) {
+ LoadError3(stp, "there are local calls to the stub for "
+ "the BIF %T:%T/%d",
+ stp->module, func, arity);
}
+ stp->export[i].address = NULL;
+ address[-1] = 0;
+ address[-2] = NIL;
+ address[-3] = NIL;
}
return 1;
@@ -1388,6 +1382,27 @@ read_export_table(LoaderState* stp)
return 0;
}
+
+static int
+is_bif(Eterm mod, Eterm func, unsigned arity)
+{
+ Export* e = erts_find_export_entry(mod, func, arity);
+ if (e == NULL) {
+ return 0;
+ }
+ if (e->code[3] != (BeamInstr) em_apply_bif) {
+ return 0;
+ }
+ if (mod == am_erlang && func == am_apply && arity == 3) {
+ /*
+ * erlang:apply/3 is a special case -- it is implemented
+ * as an instruction and it is OK to redefine it.
+ */
+ return 0;
+ }
+ return 1;
+}
+
static int
read_lambda_table(LoaderState* stp)
{
@@ -1703,9 +1718,9 @@ read_code_header(LoaderState* stp)
#define CodeNeed(w) do { \
ASSERT(ci <= code_buffer_size); \
if (code_buffer_size < ci+(w)) { \
- code_buffer_size = erts_next_heap_size(ci+(w), 0); \
- stp->code = code \
- = (BeamInstr *) erts_realloc(ERTS_ALC_T_CODE, \
+ code_buffer_size = 2*ci+(w); \
+ stp->code = code = \
+ (BeamInstr *) erts_realloc(ERTS_ALC_T_CODE, \
(void *) code, \
code_buffer_size * sizeof(BeamInstr)); \
} \
@@ -2457,6 +2472,9 @@ load_code(LoaderState* stp)
case op_int_code_end:
stp->code_buffer_size = code_buffer_size;
stp->ci = ci;
+ stp->function = THE_NON_VALUE;
+ stp->genop = NULL;
+ stp->specific_op = -1;
return 1;
}
@@ -4272,17 +4290,24 @@ final_touch(LoaderState* stp)
*/
for (i = 0; i < stp->num_exps; i++) {
- Export* ep = erts_export_put(stp->module, stp->export[i].function,
- stp->export[i].arity);
+ Export* ep;
+ BeamInstr* address = stp->export[i].address;
+
+ if (address == NULL) {
+ /* Skip stub for a BIF */
+ continue;
+ }
+ ep = erts_export_put(stp->module, stp->export[i].function,
+ stp->export[i].arity);
if (!on_load) {
- ep->address = stp->export[i].address;
+ ep->address = address;
} else {
/*
* Don't make any of the exported functions
* callable yet.
*/
ep->address = ep->code+3;
- ep->code[4] = (BeamInstr) stp->export[i].address;
+ ep->code[4] = (BeamInstr) address;
}
}
@@ -5054,7 +5079,9 @@ functions_in_module(Process* p, /* Process whose heap to use. */
BeamInstr* code;
int i;
Uint num_functions;
+ Uint need;
Eterm* hp;
+ Eterm* hp_end;
Eterm result = NIL;
if (is_not_atom(mod)) {
@@ -5067,19 +5094,28 @@ functions_in_module(Process* p, /* Process whose heap to use. */
}
code = modp->code;
num_functions = code[MI_NUM_FUNCTIONS];
- hp = HAlloc(p, 5*num_functions);
+ need = 5*num_functions;
+ hp = HAlloc(p, need);
+ hp_end = hp + need;
for (i = num_functions-1; i >= 0 ; i--) {
BeamInstr* func_info = (BeamInstr *) code[MI_FUNCTIONS+i];
Eterm name = (Eterm) func_info[3];
int arity = (int) func_info[4];
Eterm tuple;
- ASSERT(is_atom(name));
- tuple = TUPLE2(hp, name, make_small(arity));
- hp += 3;
- result = CONS(hp, tuple, result);
- hp += 2;
+ /*
+ * If the function name is [], this entry is a stub for
+ * a BIF that should be ignored.
+ */
+ ASSERT(is_atom(name) || is_nil(name));
+ if (is_atom(name)) {
+ tuple = TUPLE2(hp, name, make_small(arity));
+ hp += 3;
+ result = CONS(hp, tuple, result);
+ hp += 2;
+ }
}
+ HRelease(p, hp_end, hp);
return result;
}
@@ -5122,9 +5158,11 @@ native_addresses(Process* p, Eterm mod)
int arity = (int) func_info[4];
Eterm tuple;
- ASSERT(is_atom(name));
+ ASSERT(is_atom(name) || is_nil(name)); /* [] if BIF stub */
if (func_info[1] != 0) {
- Eterm addr = erts_bld_uint(&hp, NULL, func_info[1]);
+ Eterm addr;
+ ASSERT(is_atom(name));
+ addr = erts_bld_uint(&hp, NULL, func_info[1]);
tuple = erts_bld_tuple(&hp, NULL, 3, name, make_small(arity), addr);
result = erts_bld_cons(&hp, NULL, tuple, result);
}
@@ -5627,19 +5665,28 @@ stub_final_touch(LoaderState* stp, BeamInstr* fp)
{
int i;
int n = stp->num_exps;
+ Eterm mod = fp[2];
Eterm function = fp[3];
int arity = fp[4];
#ifdef HIPE
Lambda* lp;
#endif
+ if (is_bif(mod, function, arity)) {
+ fp[1] = 0;
+ fp[2] = 0;
+ fp[3] = 0;
+ fp[4] = 0;
+ return;
+ }
+
/*
* Test if the function should be exported.
*/
for (i = 0; i < n; i++) {
if (stp->export[i].function == function && stp->export[i].arity == arity) {
- Export* ep = erts_export_put(fp[2], function, arity);
+ Export* ep = erts_export_put(mod, function, arity);
ep->address = fp+5;
return;
}
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab
index fc53a88a3a..f051f6aa5b 100644
--- a/erts/emulator/beam/ops.tab
+++ b/erts/emulator/beam/ops.tab
@@ -829,16 +829,20 @@ call_ext_only Ar=u==2 Bif=u$bif:erlang:load_nif/2 => allocate u Ar | i_call_ext
#
-# The apply/2 and apply/3 BIFs are instructions.
+# apply/2 is an instruction, not a BIF.
#
call_ext u==2 u$func:erlang:apply/2 => i_apply_fun
call_ext_last u==2 u$func:erlang:apply/2 D => i_apply_fun_last D
call_ext_only u==2 u$func:erlang:apply/2 => i_apply_fun_only
-call_ext u==3 u$func:erlang:apply/3 => i_apply
-call_ext_last u==3 u$func:erlang:apply/3 D => i_apply_last D
-call_ext_only u==3 u$func:erlang:apply/3 => i_apply_only
+#
+# The apply/3 BIF is an instruction.
+#
+
+call_ext u==3 u$bif:erlang:apply/3 => i_apply
+call_ext_last u==3 u$bif:erlang:apply/3 D => i_apply_last D
+call_ext_only u==3 u$bif:erlang:apply/3 => i_apply_only
#
# The exit/1 and throw/1 BIFs never execute the instruction following them;
diff --git a/erts/emulator/test/bif_SUITE.erl b/erts/emulator/test/bif_SUITE.erl
index c7617d3b90..90c89cc12b 100644
--- a/erts/emulator/test/bif_SUITE.erl
+++ b/erts/emulator/test/bif_SUITE.erl
@@ -25,7 +25,9 @@
init_per_group/2,end_per_group/2,
init_per_testcase/2,end_per_testcase/2,
display/1, display_huge/0,
- types/1,
+ erl_bif_types/1,guard_bifs_in_erl_bif_types/1,
+ shadow_comments/1,
+ specs/1,improper_bif_stubs/1,auto_imports/1,
t_list_to_existing_atom/1,os_env/1,otp_7526/1,
binary_to_atom/1,binary_to_existing_atom/1,
atom_to_binary/1,min_max/1]).
@@ -33,7 +35,9 @@
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
- [types, t_list_to_existing_atom, os_env, otp_7526,
+ [erl_bif_types, guard_bifs_in_erl_bif_types, shadow_comments,
+ specs, improper_bif_stubs, auto_imports,
+ t_list_to_existing_atom, os_env, otp_7526,
display,
atom_to_binary, binary_to_atom, binary_to_existing_atom,
min_max].
@@ -86,33 +90,20 @@ deeep(N,Acc) ->
deeep(N) ->
deeep(N,[hello]).
+erl_bif_types(Config) when is_list(Config) ->
+ ensure_erl_bif_types_compiled(),
-types(Config) when is_list(Config) ->
- c:l(erl_bif_types),
- case erlang:function_exported(erl_bif_types, module_info, 0) of
- false ->
- %% Fail cleanly.
- ?line ?t:fail("erl_bif_types not compiled");
- true ->
- types_1()
- end.
-
-types_1() ->
- ?line List0 = erlang:system_info(snifs),
+ List0 = erlang:system_info(snifs),
%% Ignore missing type information for hipe BIFs.
- ?line List = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs],
+ List = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs],
- case [MFA || MFA <- List, not known_types(MFA)] of
- [] ->
- types_2(List);
- BadTypes ->
- io:put_chars("No type information:\n"),
- io:format("~p\n", [lists:sort(BadTypes)]),
- ?line ?t:fail({length(BadTypes),bifs_without_types})
- end.
+ KnownTypes = [MFA || MFA <- List, known_types(MFA)],
+ io:format("There are ~p BIFs with type information in erl_bif_types.",
+ [length(KnownTypes)]),
+ erl_bif_types_2(KnownTypes).
-types_2(List) ->
+erl_bif_types_2(List) ->
BadArity = [MFA || {M,F,A}=MFA <- List,
begin
Types = erl_bif_types:arg_types(M, F, A),
@@ -120,14 +111,14 @@ types_2(List) ->
end],
case BadArity of
[] ->
- types_3(List);
+ erl_bif_types_3(List);
[_|_] ->
io:put_chars("Bifs with bad arity\n"),
io:format("~p\n", [BadArity]),
?line ?t:fail({length(BadArity),bad_arity})
end.
-types_3(List) ->
+erl_bif_types_3(List) ->
BadSmokeTest = [MFA || {M,F,A}=MFA <- List,
begin
try erl_bif_types:type(M, F, A) of
@@ -151,9 +142,220 @@ types_3(List) ->
?line ?t:fail({length(BadSmokeTest),bad_smoke_test})
end.
+guard_bifs_in_erl_bif_types(_Config) ->
+ ensure_erl_bif_types_compiled(),
+
+ List0 = erlang:system_info(snifs),
+ List = [{F,A} || {erlang,F,A} <- List0,
+ erl_internal:guard_bif(F, A)],
+ Not = [FA || {F,A}=FA <- List,
+ not erl_bif_types:is_known(erlang, F, A)],
+ case Not of
+ [] ->
+ ok;
+ [_|_] ->
+ io:put_chars(
+ ["Dialyzer requires that all guard BIFs "
+ "have type information in erl_bif_types.\n\n"
+ "The following guard BIFs have no type information "
+ "in erl_bif_types:\n\n",
+ [io_lib:format(" ~p/~p\n", [F,A]) || {F,A} <- Not]]),
+ ?t:fail()
+ end.
+
+shadow_comments(_Config) ->
+ ensure_erl_bif_types_compiled(),
+
+ List0 = erlang:system_info(snifs),
+ List1 = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs],
+ List = [MFA || MFA <- List1, not is_operator(MFA)],
+ HasTypes = [MFA || {M,F,A}=MFA <- List,
+ erl_bif_types:is_known(M, F, A)],
+ Path = get_code_path(),
+ BifRel = sofs:relation(HasTypes, [{m,f,a}]),
+ BifModules = sofs:to_external(sofs:projection(1, BifRel)),
+ AbstrByModule = [extract_abstract(Mod, Path) || Mod <- BifModules],
+ Specs0 = [extract_specs(Mod, Abstr) ||
+ {Mod,Abstr} <- AbstrByModule],
+ Specs = lists:append(Specs0),
+ SpecFuns0 = [F || {F,_} <- Specs],
+ SpecFuns = sofs:relation(SpecFuns0, [{m,f,a}]),
+ HasTypesAndSpecs = sofs:intersection(BifRel, SpecFuns),
+ Commented0 = lists:append([extract_comments(Mod, Path) ||
+ Mod <- BifModules]),
+ Commented = sofs:relation(Commented0, [{m,f,a}]),
+ {NoComments0,_,NoBifSpecs0} =
+ sofs:symmetric_partition(HasTypesAndSpecs, Commented),
+ NoComments = sofs:to_external(NoComments0),
+ NoBifSpecs = sofs:to_external(NoBifSpecs0),
+
+ case NoComments of
+ [] ->
+ ok;
+ [_|_] ->
+ io:put_chars(
+ ["If a BIF stub has both a spec and has type information in "
+ "erl_bif_types, there *must*\n"
+ "be a comment in the source file to make that immediately "
+ "obvious.\n\nThe following comments are missing:\n\n",
+ [io_lib:format("%% Shadowed by erl_bif_types: ~p:~p/~p\n",
+ [M,F,A]) || {M,F,A} <- NoComments]]),
+ ?t:fail()
+ end,
+
+ case NoBifSpecs of
+ [] ->
+ ok;
+ [_|_] ->
+ io:put_chars(
+ ["The following functions have \"shadowed\" comments "
+ "claiming that there is type information in erl_bif_types,\n"
+ "but actually there is no such type information.\n\n"
+ "Therefore, the following comments should be removed:\n\n",
+ [io_lib:format("%% Shadowed by erl_bif_types: ~p:~p/~p\n",
+ [M,F,A]) || {M,F,A} <- NoBifSpecs]]),
+ ?t:fail()
+ end.
+
+extract_comments(Mod, Path) ->
+ Beam = which(Mod, Path),
+ SrcDir = filename:join(filename:dirname(filename:dirname(Beam)), "src"),
+ Src = filename:join(SrcDir, atom_to_list(Mod) ++ ".erl"),
+ {ok,Bin} = file:read_file(Src),
+ Lines0 = binary:split(Bin, <<"\n">>, [global]),
+ Lines1 = [T || <<"%% Shadowed by erl_bif_types: ",T/binary>> <- Lines0],
+ {ok,ReMFA} = re:compile("([^:]*):([^/]*)/(\\d*)"),
+ Lines = [L || L <- Lines1, re:run(L, ReMFA, [{capture,[]}]) =:= match],
+ [begin
+ {match,[M,F,A]} = re:run(L, ReMFA, [{capture,all_but_first,list}]),
+ {list_to_atom(M),list_to_atom(F),list_to_integer(A)}
+ end || L <- Lines].
+
+ensure_erl_bif_types_compiled() ->
+ c:l(erl_bif_types),
+ case erlang:function_exported(erl_bif_types, module_info, 0) of
+ false ->
+ %% Fail cleanly.
+ ?t:fail("erl_bif_types not compiled");
+ true ->
+ ok
+ end.
+
known_types({M,F,A}) ->
erl_bif_types:is_known(M, F, A).
+specs(_) ->
+ List0 = erlang:system_info(snifs),
+
+ %% Ignore missing type information for hipe BIFs.
+ List1 = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs],
+
+ %% Ignore all operators.
+ List = [MFA || MFA <- List1, not is_operator(MFA)],
+
+ %% Extract specs from the abstract code for all BIFs.
+ Path = get_code_path(),
+ BifRel = sofs:relation(List, [{m,f,a}]),
+ BifModules = sofs:to_external(sofs:projection(1, BifRel)),
+ AbstrByModule = [extract_abstract(Mod, Path) || Mod <- BifModules],
+ Specs0 = [extract_specs(Mod, Abstr) ||
+ {Mod,Abstr} <- AbstrByModule],
+ Specs = lists:append(Specs0),
+ BifSet = sofs:set(List, [function]),
+ SpecRel0 = sofs:relation(Specs, [{function,spec}]),
+ SpecRel = sofs:restriction(SpecRel0, BifSet),
+
+ %% Find BIFs without specs.
+ NoSpecs0 = sofs:difference(BifSet, sofs:domain(SpecRel)),
+ NoSpecs = sofs:to_external(NoSpecs0),
+ case NoSpecs of
+ [] ->
+ ok;
+ [_|_] ->
+ io:put_chars("The following BIFs don't have specs:\n"),
+ [print_mfa(MFA) || MFA <- NoSpecs],
+ ?t:fail()
+ end.
+
+is_operator({erlang,F,A}) ->
+ erl_internal:arith_op(F, A) orelse
+ erl_internal:bool_op(F, A) orelse
+ erl_internal:comp_op(F, A) orelse
+ erl_internal:list_op(F, A) orelse
+ erl_internal:send_op(F, A);
+is_operator(_) -> false.
+
+extract_specs(M, Abstr) ->
+ [{make_mfa(M, Name),Spec} || {attribute,_,spec,{Name,Spec}} <- Abstr].
+
+make_mfa(M, {F,A}) -> {M,F,A};
+make_mfa(M, {M,_,_}=MFA) -> MFA.
+
+improper_bif_stubs(_) ->
+ Bifs0 = erlang:system_info(snifs),
+ Bifs = [MFA || {M,_,_}=MFA <- Bifs0, M =/= hipe_bifs],
+ Path = get_code_path(),
+ BifRel = sofs:relation(Bifs, [{m,f,a}]),
+ BifModules = sofs:to_external(sofs:projection(1, BifRel)),
+ AbstrByModule = [extract_abstract(Mod, Path) || Mod <- BifModules],
+ Funcs0 = [extract_functions(Mod, Abstr) ||
+ {Mod,Abstr} <- AbstrByModule],
+ Funcs = lists:append(Funcs0),
+ BifSet = sofs:set(Bifs, [function]),
+ FuncRel0 = sofs:relation(Funcs, [{function,code}]),
+ FuncRel = sofs:restriction(FuncRel0, BifSet),
+ [check_stub(MFA, Body) || {MFA,Body} <- sofs:to_external(FuncRel)],
+ ok.
+
+auto_imports(_Config) ->
+ Path = get_code_path(),
+ {erlang,Abstr} = extract_abstract(erlang, Path),
+ SpecFuns = [Name || {attribute,_,spec,{Name,_}} <- Abstr],
+ auto_imports(SpecFuns, 0).
+
+auto_imports([{F,A}|T], Errors) ->
+ case erl_internal:bif(F, A) of
+ false ->
+ io:format("~p/~p: not auto-imported, but spec claims it "
+ "is auto-imported", [F,A]),
+ auto_imports(T, Errors+1);
+ true ->
+ auto_imports(T, Errors)
+ end;
+auto_imports([{erlang,F,A}|T], Errors) ->
+ case erl_internal:bif(F, A) of
+ false ->
+ auto_imports(T, Errors);
+ true ->
+ io:format("~p/~p: auto-imported, but "
+ "spec claims it is *not* auto-imported", [F,A]),
+ auto_imports(T, Errors+1)
+ end;
+auto_imports([], 0) ->
+ ok;
+auto_imports([], Errors) ->
+ ?t:fail({Errors,inconsistencies}).
+
+extract_functions(M, Abstr) ->
+ [{{M,F,A},Body} || {function,_,F,A,Body} <- Abstr].
+
+check_stub({erlang,apply,3}, _) ->
+ ok;
+check_stub({_,F,A}, B) ->
+ try
+ [{clause,_,Args,[],Body}] = B,
+ A = length(Args),
+ [{call,_,{remote,_,{atom,_,erlang},{atom,_,nif_error}},[_]}] = Body
+ catch
+ _:_ ->
+ io:put_chars("Invalid body for the following BIF stub:\n"),
+ Func = {function,0,F,A,B},
+ io:put_chars(erl_pp:function(Func)),
+ io:nl(),
+ io:put_chars("The body should be: erlang:nif_error(undef)"),
+ ?t:fail()
+ end.
+
t_list_to_existing_atom(Config) when is_list(Config) ->
?line all = list_to_existing_atom("all"),
?line ?MODULE = list_to_existing_atom(?MODULE_STRING),
@@ -442,3 +644,30 @@ min_max(Config) when is_list(Config) ->
id(I) -> I.
+%% Get code path, including the path for the erts application.
+get_code_path() ->
+ case code:lib_dir(erts) of
+ {error,bad_name} ->
+ Erts = filename:join([code:root_dir(),"erts","preloaded","ebin"]),
+ [Erts|code:get_path()];
+ _ ->
+ code:get_path()
+ end.
+
+which(Mod, Path) ->
+ which_1(atom_to_list(Mod) ++ ".beam", Path).
+
+which_1(Base, [D|Ds]) ->
+ Path = filename:join(D, Base),
+ case filelib:is_regular(Path) of
+ true -> Path;
+ false -> which_1(Base, Ds)
+ end.
+print_mfa({M,F,A}) ->
+ io:format("~p:~p/~p", [M,F,A]).
+
+extract_abstract(Mod, Path) ->
+ Beam = which(Mod, Path),
+ {ok,{Mod,[{abstract_code,{raw_abstract_v1,Abstr}}]}} =
+ beam_lib:chunks(Beam, [abstract_code]),
+ {Mod,Abstr}.
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-13 21:47:04 +0000