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-rw-r--r--erts/doc/src/erlang.xml12
-rw-r--r--erts/emulator/beam/beam_bif_load.c30
-rw-r--r--erts/emulator/beam/bif.tab6
-rw-r--r--erts/emulator/test/code_SUITE.erl32
-rw-r--r--lib/hipe/cerl/erl_bif_types.erl5
-rw-r--r--lib/kernel/src/code_server.erl17
6 files changed, 89 insertions, 13 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index 9b560f04c9..79dc6838a6 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -518,6 +518,18 @@
</func>
<func>
+ <name>check_old_code(Module) -> boolean()</name>
+ <fsummary>Check if a module has old code</fsummary>
+ <type>
+ <v>Module = atom()</v>
+ </type>
+ <desc>
+ <p>Returns <c>true</c> if the <c>Module</c> has old code,
+ and <c>false</c> otherwise.</p>
+ <p>See also <seealso marker="kernel:code">code(3)</seealso>.</p>
+ </desc>
+ </func>
+ <func>
<name>check_process_code(Pid, Module) -> boolean()</name>
<fsummary>Check if a process is executing old code for a module</fsummary>
<type>
diff --git a/erts/emulator/beam/beam_bif_load.c b/erts/emulator/beam/beam_bif_load.c
index d76a7d8e9f..2561d7a630 100644
--- a/erts/emulator/beam/beam_bif_load.c
+++ b/erts/emulator/beam/beam_bif_load.c
@@ -162,6 +162,23 @@ BIF_RETTYPE code_make_stub_module_3(BIF_ALIST_3)
return res;
}
+BIF_RETTYPE
+check_old_code_1(BIF_ALIST_1)
+{
+ Module* modp;
+
+ if (is_not_atom(BIF_ARG_1)) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+ modp = erts_get_module(BIF_ARG_1);
+ if (modp == NULL) { /* Doesn't exist. */
+ BIF_RET(am_false);
+ } else if (modp->old_code == NULL) { /* No old code. */
+ BIF_RET(am_false);
+ }
+ BIF_RET(am_true);
+}
+
Eterm
check_process_code_2(BIF_ALIST_2)
{
@@ -175,6 +192,13 @@ check_process_code_2(BIF_ALIST_2)
Eterm res;
if (internal_pid_index(BIF_ARG_1) >= erts_max_processes)
goto error;
+ modp = erts_get_module(BIF_ARG_2);
+ if (modp == NULL) { /* Doesn't exist. */
+ return am_false;
+ } else if (modp->old_code == NULL) { /* No old code. */
+ return am_false;
+ }
+
#ifdef ERTS_SMP
rp = erts_pid2proc_suspend(BIF_P, ERTS_PROC_LOCK_MAIN,
BIF_ARG_1, ERTS_PROC_LOCK_MAIN);
@@ -188,7 +212,6 @@ check_process_code_2(BIF_ALIST_2)
ERTS_BIF_YIELD2(bif_export[BIF_check_process_code_2], BIF_P,
BIF_ARG_1, BIF_ARG_2);
}
- modp = erts_get_module(BIF_ARG_2);
res = check_process_code(rp, modp);
#ifdef ERTS_SMP
if (BIF_P != rp) {
@@ -412,11 +435,6 @@ check_process_code(Process* rp, Module* modp)
#endif
#define INSIDE(a) (start <= (a) && (a) < end)
- if (modp == NULL) { /* Doesn't exist. */
- return am_false;
- } else if (modp->old_code == NULL) { /* No old code. */
- return am_false;
- }
/*
* Pick up limits for the module.
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index d9dd80fa8b..b171e99e03 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -802,6 +802,12 @@ bif prim_file:internal_name2native/1
bif prim_file:internal_native2name/1
bif prim_file:internal_normalize_utf8/1
bif file:native_name_encoding/0
+
+#
+# New in R14B04.
+#
+bif erlang:check_old_code/1
+
#
# Obsolete
#
diff --git a/erts/emulator/test/code_SUITE.erl b/erts/emulator/test/code_SUITE.erl
index a062cea117..29cbdedd17 100644
--- a/erts/emulator/test/code_SUITE.erl
+++ b/erts/emulator/test/code_SUITE.erl
@@ -20,7 +20,9 @@
-module(code_SUITE).
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2,
- new_binary_types/1,t_check_process_code/1,t_check_process_code_ets/1,
+ new_binary_types/1,
+ t_check_process_code/1,t_check_old_code/1,
+ t_check_process_code_ets/1,
external_fun/1,get_chunk/1,module_md5/1,make_stub/1,
make_stub_many_funs/1,constant_pools/1,
false_dependency/1,coverage/1]).
@@ -31,7 +33,7 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[new_binary_types, t_check_process_code,
- t_check_process_code_ets, external_fun, get_chunk,
+ t_check_process_code_ets, t_check_old_code, external_fun, get_chunk,
module_md5, make_stub, make_stub_many_funs,
constant_pools, false_dependency, coverage].
@@ -248,6 +250,32 @@ fun_refc(F) ->
Count.
+%% Test the erlang:check_old_code/1 BIF.
+t_check_old_code(Config) when is_list(Config) ->
+ ?line Data = ?config(data_dir, Config),
+ ?line File = filename:join(Data, "my_code_test"),
+
+ ?line erlang:purge_module(my_code_test),
+ ?line erlang:delete_module(my_code_test),
+ ?line catch erlang:purge_module(my_code_test),
+
+ ?line false = erlang:check_old_code(my_code_test),
+
+ ?line {ok,my_code_test,Code} = compile:file(File, [binary]),
+ ?line {module,my_code_test} = code:load_binary(my_code_test, File, Code),
+
+ ?line false = erlang:check_old_code(my_code_test),
+ ?line {module,my_code_test} = code:load_binary(my_code_test, File, Code),
+ ?line true = erlang:check_old_code(my_code_test),
+
+ ?line true = erlang:purge_module(my_code_test),
+ ?line true = erlang:delete_module(my_code_test),
+ ?line true = erlang:purge_module(my_code_test),
+
+ ?line {'EXIT',_} = (catch erlang:check_old_code([])),
+
+ ok.
+
external_fun(Config) when is_list(Config) ->
?line false = erlang:function_exported(another_code_test, x, 1),
?line ExtFun = erlang:make_fun(id(another_code_test), x, 1),
diff --git a/lib/hipe/cerl/erl_bif_types.erl b/lib/hipe/cerl/erl_bif_types.erl
index 606fd307ea..43c2ac2615 100644
--- a/lib/hipe/cerl/erl_bif_types.erl
+++ b/lib/hipe/cerl/erl_bif_types.erl
@@ -672,6 +672,9 @@ type(erlang, call_on_load_function, 1, Xs) ->
type(erlang, cancel_timer, 1, Xs) ->
strict(arg_types(erlang, cancel_timer, 1), Xs,
fun (_) -> t_sup(t_integer(), t_atom('false')) end);
+type(erlang, check_old_code, 1, Xs) ->
+ strict(arg_types(erlang, check_old_code, 1), Xs,
+ fun (_) -> t_boolean() end);
type(erlang, check_process_code, 2, Xs) ->
strict(arg_types(erlang, check_process_code, 2), Xs,
fun (_) -> t_boolean() end);
@@ -3394,6 +3397,8 @@ arg_types(erlang, call_on_load_function, 1) ->
[t_atom()];
arg_types(erlang, cancel_timer, 1) ->
[t_reference()];
+arg_types(erlang, check_old_code, 1) ->
+ [t_atom()];
arg_types(erlang, check_process_code, 2) ->
[t_pid(), t_atom()];
arg_types(erlang, crc32, 1) ->
diff --git a/lib/kernel/src/code_server.erl b/lib/kernel/src/code_server.erl
index 4a1fc7df34..85bbff9cc3 100644
--- a/lib/kernel/src/code_server.erl
+++ b/lib/kernel/src/code_server.erl
@@ -1379,8 +1379,12 @@ absname_vr([[X, $:]|Name], _, _AbsBase) ->
%% Kill all processes running code from *old* Module, and then purge the
%% module. Return true if any processes killed, else false.
-do_purge(Mod) ->
- do_purge(processes(), to_atom(Mod), false).
+do_purge(Mod0) ->
+ Mod = to_atom(Mod0),
+ case erlang:check_old_code(Mod) of
+ false -> false;
+ true -> do_purge(processes(), Mod, false)
+ end.
do_purge([P|Ps], Mod, Purged) ->
case erlang:check_process_code(P, Mod) of
@@ -1399,16 +1403,19 @@ do_purge([], Mod, Purged) ->
Purged.
%% do_soft_purge(Module)
-%% Purge old code only if no procs remain that run old code
+%% Purge old code only if no procs remain that run old code.
%% Return true in that case, false if procs remain (in this
%% case old code is not purged)
do_soft_purge(Mod) ->
- catch do_soft_purge(processes(), Mod).
+ case erlang:check_old_code(Mod) of
+ false -> true;
+ true -> do_soft_purge(processes(), Mod)
+ end.
do_soft_purge([P|Ps], Mod) ->
case erlang:check_process_code(P, Mod) of
- true -> throw(false);
+ true -> false;
false -> do_soft_purge(Ps, Mod)
end;
do_soft_purge([], Mod) ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 21:34:52 +0000