diff options
Diffstat (limited to 'erts/emulator/test/code_SUITE.erl')
| -rw-r--r-- | erts/emulator/test/code_SUITE.erl | 222 |
1 files changed, 215 insertions, 7 deletions
diff --git a/erts/emulator/test/code_SUITE.erl b/erts/emulator/test/code_SUITE.erl index 29cbdedd17..25ce94096f 100644 --- a/erts/emulator/test/code_SUITE.erl +++ b/erts/emulator/test/code_SUITE.erl @@ -20,30 +20,34 @@ -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, + versions/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]). + make_stub_many_funs/1,constant_pools/1,constant_refc_binaries/1, + false_dependency/1,coverage/1,fun_confusion/1]). +-define(line_trace, 1). -include_lib("test_server/include/test_server.hrl"). suite() -> [{ct_hooks,[ts_install_cth]}]. all() -> - [new_binary_types, t_check_process_code, + [versions, new_binary_types, t_check_process_code, 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]. + constant_pools, constant_refc_binaries, false_dependency, + coverage, fun_confusion]. groups() -> []. init_per_suite(Config) -> + erts_debug:set_internal_state(available_internal_state, true), Config. end_per_suite(_Config) -> + catch erts_debug:set_internal_state(available_internal_state, false), ok. init_per_group(_GroupName, Config) -> @@ -52,6 +56,60 @@ init_per_group(_GroupName, Config) -> end_per_group(_GroupName, Config) -> Config. +%% Make sure that only two versions of a module can be loaded. +versions(Config) when is_list(Config) -> + V1 = compile_version(1, Config), + V2 = compile_version(2, Config), + V3 = compile_version(3, Config), + + {ok,P1,1} = load_version(V1, 1), + {ok,P2,2} = load_version(V2, 2), + {error,not_purged} = load_version(V2, 2), + {error,not_purged} = load_version(V3, 3), + + 1 = check_version(P1), + 2 = check_version(P2), + 2 = versions:version(), + + %% Kill processes, unload code. + P1 ! P2 ! done, + _ = monitor(process, P1), + _ = monitor(process, P2), + receive + {'DOWN',_,process,P1,normal} -> ok + end, + receive + {'DOWN',_,process,P2,normal} -> ok + end, + true = erlang:purge_module(versions), + true = erlang:delete_module(versions), + true = erlang:purge_module(versions), + ok. + +compile_version(Version, Config) -> + Data = ?config(data_dir, Config), + File = filename:join(Data, "versions"), + {ok,versions,Bin} = compile:file(File, [{d,'VERSION',Version}, + binary,report]), + Bin. + +load_version(Code, Ver) -> + case erlang:load_module(versions, Code) of + {module,versions} -> + Pid = spawn_link(versions, loop, []), + Ver = versions:version(), + Ver = check_version(Pid), + {ok,Pid,Ver}; + Error -> + Error + end. + +check_version(Pid) -> + Pid ! {self(),version}, + receive + {Pid,version,Version} -> + Version + end. new_binary_types(Config) when is_list(Config) -> ?line Data = ?config(data_dir, Config), @@ -278,7 +336,8 @@ t_check_old_code(Config) when is_list(Config) -> 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), + AnotherCodeTest = id(another_code_test), + ExtFun = fun AnotherCodeTest:x/1, ?line {'EXIT',{undef,_}} = (catch ExtFun(answer)), ?line false = erlang:function_exported(another_code_test, x, 1), ?line false = lists:member(another_code_test, erlang:loaded()), @@ -403,7 +462,7 @@ make_stub_many_funs(Config) when is_list(Config) -> constant_pools(Config) when is_list(Config) -> ?line Data = ?config(data_dir, Config), ?line File = filename:join(Data, "literals"), - ?line {ok,literals,Code} = compile:file(File, [report,binary,constant_pool]), + ?line {ok,literals,Code} = compile:file(File, [report,binary]), ?line {module,literals} = erlang:load_module(literals, make_sub_binary(Code)), @@ -474,6 +533,131 @@ create_old_heap() -> create_old_heap() end. +constant_refc_binaries(Config) when is_list(Config) -> + wait_for_memory_deallocations(), + Bef = memory_binary(), + io:format("Binary data (bytes) before test: ~p\n", [Bef]), + + %% Compile the the literals module. + Data = ?config(data_dir, Config), + File = filename:join(Data, "literals"), + {ok,literals,Code} = compile:file(File, [report,binary]), + + %% Load the code and make sure that the binary is a refc binary. + {module,literals} = erlang:load_module(literals, Code), + Bin = literals:binary(), + Sz = byte_size(Bin), + Check = erlang:md5(Bin), + io:format("Size of literal refc binary: ~p\n", [Sz]), + {refc_binary,Sz,_,_} = erts_debug:get_internal_state({binary_info,Bin}), + true = erlang:delete_module(literals), + false = erlang:check_process_code(self(), literals), + true = erlang:purge_module(literals), + + %% Now try to provoke a memory leak. + provoke_mem_leak(10, Code, Check), + + %% Calculate the change in allocated binary data. + erlang:garbage_collect(), + wait_for_memory_deallocations(), + Aft = memory_binary(), + io:format("Binary data (bytes) after test: ~p", [Aft]), + Diff = Aft - Bef, + if + Diff < 0 -> + io:format("~p less bytes", [abs(Diff)]); + Diff > 0 -> + io:format("~p more bytes", [Diff]); + true -> + ok + end, + + %% Test for leaks. We must accept some natural variations in + %% the size of allocated binaries. + if + Diff > 64*1024 -> + ?t:fail(binary_leak); + true -> + ok + end. + +memory_binary() -> + try + erlang:memory(binary) + catch + error:notsup -> + 0 + end. + +provoke_mem_leak(0, _, _) -> ok; +provoke_mem_leak(N, Code, Check) -> + {module,literals} = erlang:load_module(literals, Code), + + %% Create several processes with references to the literal binary. + Self = self(), + Pids = [spawn_link(fun() -> + create_binaries(Self, NumRefs, Check) + end) || NumRefs <- lists:seq(1, 10)], + [receive {started,Pid} -> ok end || Pid <- Pids], + + %% Make the code old and remove references to the constant pool + %% in all processes. + true = erlang:delete_module(literals), + Ms = [spawn_monitor(fun() -> + false = erlang:check_process_code(Pid, literals) + end) || Pid <- Pids], + [receive + {'DOWN',R,process,P,normal} -> + ok + end || {P,R} <- Ms], + + %% Purge the code. + true = erlang:purge_module(literals), + + %% Tell the processes that the code has been purged. + [begin + monitor(process, Pid), + Pid ! purged + end || Pid <- Pids], + + %% Wait for all processes to terminate. + [receive + {'DOWN',_,process,Pid,normal} -> + ok + end || Pid <- Pids], + + %% We now expect that the binary has been deallocated. + provoke_mem_leak(N-1, Code, Check). + +create_binaries(Parent, NumRefs, Check) -> + Bin = literals:binary(), + Bins = lists:duplicate(NumRefs, Bin), + {bits,Bits} = literals:bits(), + Parent ! {started,self()}, + receive + purged -> + %% The code has been purged. Now make sure that + %% the binaries haven't been corrupted. + Check = erlang:md5(Bin), + [Bin = B || B <- Bins], + <<42:13,Bin/binary>> = Bits, + + %% Remove all references to the binaries + %% Doing it explicitly like this ensures that + %% the binaries are gone when the parent process + %% receives the 'DOWN' message. + erlang:garbage_collect() + end. + +wait_for_memory_deallocations() -> + try + erts_debug:set_internal_state(wait, deallocations) + catch + error:undef -> + erts_debug:set_internal_state(available_internal_state, true), + wait_for_memory_deallocations() + end. + %% OTP-7559: c_p->cp could contain garbage and create a false dependency %% to a module in a process. (Thanks to Richard Carlsson.) false_dependency(Config) when is_list(Config) -> @@ -555,6 +739,30 @@ coverage(Config) when is_list(Config) -> ?line {'EXIT',{badarg,_}} = (catch erlang:module_loaded(42)), ok. +fun_confusion(Config) when is_list(Config) -> + Data = ?config(data_dir, Config), + Src = filename:join(Data, "fun_confusion"), + Mod = fun_confusion, + + %% Load first version of module. + compile_load(Mod, Src, 1), + F1 = Mod:f(), + 1 = F1(), + + %% Load second version of module. + compile_load(Mod, Src, 2), + F2 = Mod:f(), + + %% F1 should refer to the old code, not the newly loaded code. + 1 = F1(), + 2 = F2(), + ok. + +compile_load(Mod, Src, Ver) -> + {ok,Mod,Code1} = compile:file(Src, [binary,{d,version,Ver}]), + {module,Mod} = code:load_binary(Mod, "fun_confusion.beam", Code1), + ok. + %% Utilities. make_sub_binary(Bin) when is_binary(Bin) -> |