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-rw-r--r--lib/sasl/src/release_handler_1.erl90
1 files changed, 59 insertions, 31 deletions
diff --git a/lib/sasl/src/release_handler_1.erl b/lib/sasl/src/release_handler_1.erl
index 590ecdba65..ef95606bb5 100644
--- a/lib/sasl/src/release_handler_1.erl
+++ b/lib/sasl/src/release_handler_1.erl
@@ -19,7 +19,8 @@
-module(release_handler_1).
%% External exports
--export([eval_script/1, eval_script/5, check_script/2]).
+-export([eval_script/1, eval_script/5,
+ check_script/2, check_old_processes/2]).
-export([get_current_vsn/1]). %% exported because used in a test case
-record(eval_state, {bins = [], stopped = [], suspended = [], apps = [],
@@ -47,17 +48,20 @@
%%% This is a low-level release handler.
%%%-----------------------------------------------------------------
check_script(Script, LibDirs) ->
- case catch check_old_processes(Script) of
- ok ->
+ case catch check_old_processes(Script,soft_purge) of
+ {ok, PurgeMods} ->
{Before, _After} = split_instructions(Script),
case catch lists:foldl(fun(Instruction, EvalState1) ->
eval(Instruction, EvalState1)
end,
#eval_state{libdirs = LibDirs},
Before) of
- EvalState2 when is_record(EvalState2, eval_state) -> ok;
- {error, Error} -> {error, Error};
- Other -> {error, Other}
+ EvalState2 when is_record(EvalState2, eval_state) ->
+ {ok,PurgeMods};
+ {error, Error} ->
+ {error, Error};
+ Other ->
+ {error, Other}
end;
{error, Mod} ->
{error, {old_processes, Mod}}
@@ -68,8 +72,8 @@ eval_script(Script) ->
eval_script(Script, [], [], [], []).
eval_script(Script, Apps, LibDirs, NewLibs, Opts) ->
- case catch check_old_processes(Script) of
- ok ->
+ case catch check_old_processes(Script,soft_purge) of
+ {ok,_} ->
{Before, After} = split_instructions(Script),
case catch lists:foldl(fun(Instruction, EvalState1) ->
eval(Instruction, EvalState1)
@@ -112,40 +116,64 @@ split_instructions([], Before) ->
{[], lists:reverse(Before)}.
%%-----------------------------------------------------------------
-%% Func: check_old_processes/1
+%% Func: check_old_processes/2
%% Args: Script = [instruction()]
+%% PrePurgeMethod = soft_purge | brutal_purge
%% Purpose: Check if there is any process that runs an old version
-%% of a module that should be soft_purged, (i.e. not purged
-%% at all if there is any such process). Returns {error, Mod}
-%% if so, ok otherwise.
-%% Returns: ok | {error, Mod}
+%% of a module that should be purged according to PrePurgeMethod.
+%% Returns a list of modules that can be soft_purged.
+%%
+%% If PrePurgeMethod == soft_purge, the function will succeed
+%% only if there is no process running old code of any of the
+%% modules. Else it will throw {error,Mod}, where Mod is the
+%% first module found that can not be soft_purged.
+%%
+%% If PrePurgeMethod == brutal_purge, the function will
+%% always succeed and return a list of all modules that are
+%% specified in the script with PrePurgeMethod brutal_purge,
+%% but that can be soft_purged.
+%%
+%% Returns: {ok,PurgeMods} | {error, Mod}
+%% PurgeMods = [Mod]
%% Mod = atom()
%%-----------------------------------------------------------------
-check_old_processes(Script) ->
+check_old_processes(Script,PrePurgeMethod) ->
Procs = erlang:processes(),
- lists:foreach(fun({load, {Mod, soft_purge, _PostPurgeMethod}}) ->
- check_old_code(Mod,Procs);
- ({remove, {Mod, soft_purge, _PostPurgeMethod}}) ->
- check_old_code(Mod,Procs);
- (_) -> ok
- end,
- Script).
+ {ok,lists:flatmap(
+ fun({load, {Mod, PPM, _PostPurgeMethod}}) when PPM==PrePurgeMethod ->
+ check_old_code(Mod,Procs,PrePurgeMethod);
+ ({remove, {Mod, PPM, _PostPurgeMethod}}) when PPM==PrePurgeMethod ->
+ check_old_code(Mod,Procs,PrePurgeMethod);
+ (_) -> []
+ end,
+ Script)}.
-check_old_code(Mod,Procs) ->
+check_old_code(Mod,Procs,PrePurgeMethod) ->
case erlang:check_old_code(Mod) of
- true ->
- lists:foreach(fun(Pid) ->
- case erlang:check_process_code(Pid, Mod) of
- false -> ok;
- true -> throw({error, Mod})
- end
- end,
- Procs);
+ true when PrePurgeMethod==soft_purge ->
+ do_check_old_code(Mod,Procs);
+ true when PrePurgeMethod==brutal_purge ->
+ case catch do_check_old_code(Mod,Procs) of
+ {error,Mod} -> [];
+ R -> R
+ end;
false ->
- ok
+ []
end.
+do_check_old_code(Mod,Procs) ->
+ lists:foreach(
+ fun(Pid) ->
+ case erlang:check_process_code(Pid, Mod) of
+ false -> ok;
+ true -> throw({error, Mod})
+ end
+ end,
+ Procs),
+ [Mod].
+
+
%%-----------------------------------------------------------------
%% An unpurged module is a module for which there exist an old
%% version of the code. This should only be the case if there are