diff options
Diffstat (limited to 'lib/sasl/src/release_handler_1.erl')
| -rw-r--r-- | lib/sasl/src/release_handler_1.erl | 90 |
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 |