From e5524c796e878c8bb3e878ad40f03dcf8026b457 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Mon, 27 Aug 2012 11:13:10 +0200 Subject: erl_bif_trace: Remove an unused variable --- erts/emulator/beam/erl_bif_trace.c | 1 - 1 file changed, 1 deletion(-) diff --git a/erts/emulator/beam/erl_bif_trace.c b/erts/emulator/beam/erl_bif_trace.c index e88fb8c9f4..6515eafbd5 100644 --- a/erts/emulator/beam/erl_bif_trace.c +++ b/erts/emulator/beam/erl_bif_trace.c @@ -118,7 +118,6 @@ trace_pattern(Process* p, Eterm MFA, Eterm Pattern, Eterm flaglist) int is_global; Process *meta_tracer_proc = p; Eterm meta_tracer_pid = p->id; - int is_blocking = 0; if (!erts_try_seize_code_write_permission(p)) { ERTS_BIF_YIELD3(bif_export[BIF_trace_pattern_3], p, MFA, Pattern, flaglist); -- cgit v1.2.3 From 2848eb10d0c006f4498acddfdf89830ec1040c11 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Mon, 27 Aug 2012 16:53:06 +0200 Subject: Make sure that turning off local trace does not turn off global trace Attempting to turn off local call trace when there was global call trace enabled would incorrectly turn off the global call trace. This bug was introduced in bf5bf8b93dccca86c4775b21ee0db49eb6a3b133. --- erts/emulator/beam/erl_bif_trace.c | 19 +++-- erts/emulator/test/trace_local_SUITE.erl | 119 ++++++++++++++++++++++++++++++- 2 files changed, 129 insertions(+), 9 deletions(-) diff --git a/erts/emulator/beam/erl_bif_trace.c b/erts/emulator/beam/erl_bif_trace.c index 6515eafbd5..06cec1795d 100644 --- a/erts/emulator/beam/erl_bif_trace.c +++ b/erts/emulator/beam/erl_bif_trace.c @@ -1369,12 +1369,8 @@ erts_set_trace_pattern(Process*p, Eterm* mfa, int specified, BeamInstr* pc = fp[i].pc; Export* ep = (Export *)(((char *)(pc-3)) - offsetof(Export, code)); - if (!on || flags.breakpoint) { - erts_clear_call_trace_bif(pc, 0); - if (pc[0] == (BeamInstr) BeamOp(op_i_generic_breakpoint)) { - pc[0] = (BeamInstr) BeamOp(op_jump_f); - } - } else { + if (on && !flags.breakpoint) { + /* Turn on global call tracing */ if (ep->addressv[code_ix] != pc) { fp[i].mod->curr.num_traced_exports++; #ifdef DEBUG @@ -1387,6 +1383,17 @@ erts_set_trace_pattern(Process*p, Eterm* mfa, int specified, if (ep->addressv[code_ix] != pc) { pc[0] = (BeamInstr) BeamOp(op_i_generic_breakpoint); } + } else if (!on && flags.breakpoint) { + /* Turn off breakpoint tracing -- nothing to do here. */ + } else { + /* + * Turn off global tracing, either explicitly or implicitly + * before turning on breakpoint tracing. + */ + erts_clear_call_trace_bif(pc, 0); + if (pc[0] == (BeamInstr) BeamOp(op_i_generic_breakpoint)) { + pc[0] = (BeamInstr) BeamOp(op_jump_f); + } } } diff --git a/erts/emulator/test/trace_local_SUITE.erl b/erts/emulator/test/trace_local_SUITE.erl index 54f8cc3c30..1e0705fabe 100644 --- a/erts/emulator/test/trace_local_SUITE.erl +++ b/erts/emulator/test/trace_local_SUITE.erl @@ -70,7 +70,8 @@ config(priv_dir,_) -> -export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, init_per_group/2,end_per_group/2, basic/1, bit_syntax/1, - return/1, on_and_off/1, stack_grow/1,info/1, delete/1, + return/1, on_and_off/1, systematic_on_off/1, + stack_grow/1,info/1, delete/1, exception/1, exception_apply/1, exception_function/1, exception_apply_function/1, exception_nocatch/1, exception_nocatch_apply/1, @@ -105,7 +106,8 @@ all() -> case test_server:is_native(trace_local_SUITE) of true -> [not_run]; false -> - [basic, bit_syntax, return, on_and_off, stack_grow, + [basic, bit_syntax, return, on_and_off, systematic_on_off, + stack_grow, info, delete, exception, exception_apply, exception_function, exception_apply_function, exception_nocatch, exception_nocatch_apply, @@ -583,7 +585,118 @@ on_and_off_test() -> end, ?line ?NM, ok. - + +systematic_on_off(Config) when is_list(Config) -> + setup([call]), + Local = combinations([local,meta,call_count,call_time]), + [systematic_on_off_1(Flags) || Flags <- Local], + + %% Make sure that we don't get any trace messages when trace + %% is supposed to be off. + receive_no_next(500). + +systematic_on_off_1(Local) -> + io:format("~p\n", [Local]), + + %% Global off. + verify_trace_info(false, []), + 1 = erlang:trace_pattern({?MODULE,exported_wrap,1}, true, Local), + verify_trace_info(false, Local), + 1 = erlang:trace_pattern({?MODULE,exported_wrap,1}, false, [global]), + verify_trace_info(false, Local), + 1 = erlang:trace_pattern({?MODULE,exported_wrap,1}, false, Local), + verify_trace_info(false, []), + + %% Global on. + 1 = erlang:trace_pattern({?MODULE,exported_wrap,1}, true, [global]), + verify_trace_info(true, []), + 1 = erlang:trace_pattern({?MODULE,exported_wrap,1}, false, Local), + verify_trace_info(true, []), + 1 = erlang:trace_pattern({?MODULE,exported_wrap,1}, false, [global]), + verify_trace_info(false, []), + + %% Implicitly turn off global call trace. + 1 = erlang:trace_pattern({?MODULE,exported_wrap,1}, true, [global]), + verify_trace_info(true, []), + 1 = erlang:trace_pattern({?MODULE,exported_wrap,1}, true, Local), + verify_trace_info(false, Local), + + %% Implicitly turn off local call trace. + 1 = erlang:trace_pattern({?MODULE,exported_wrap,1}, true, [global]), + verify_trace_info(true, []), + + %% Turn off global call trace. Everything should be off now. + 1 = erlang:trace_pattern({?MODULE,exported_wrap,1}, false, [global]), + verify_trace_info(false, []), + + ok. + +verify_trace_info(Global, Local) -> + case erlang:trace_info({?MODULE,exported_wrap,1}, all) of + {all,false} -> + false = Global, + [] = Local; + {all,Ps} -> + io:format("~p\n", [Ps]), + [verify_trace_info(P, Global, Local) || P <- Ps] + end, + global_call(Global, Local), + local_call(Local), + ok. + +verify_trace_info({traced,global}, true, []) -> ok; +verify_trace_info({traced,local}, false, _) -> ok; +verify_trace_info({match_spec,[]}, _, _) -> ok; +verify_trace_info({meta_match_spec,[]}, _, _) -> ok; +verify_trace_info({LocalFlag,Bool}, _, Local) when is_boolean(Bool) -> + try + Bool = lists:member(LocalFlag, Local) + catch + error:_ -> + io:format("Line ~p: {~p,~p}, false, ~p\n", + [?LINE,LocalFlag,Bool,Local]), + ?t:fail() + end; +verify_trace_info({meta,Pid}, false, Local) when is_pid(Pid) -> + true = lists:member(meta, Local); +verify_trace_info({call_time,_}, false, Local) -> + true = lists:member(call_time, Local); +verify_trace_info({call_count,_}, false, Local) -> + true = lists:member(call_time, Local). + +global_call(Global, Local) -> + apply_slave(?MODULE, exported_wrap, [global_call]), + case Global of + false -> + recv_local_call(Local, [global_call]); + true -> + ?CT(?MODULE, exported_wrap, [global_call]) + end. + +local_call(Local) -> + lambda_slave(fun() -> exported_wrap(local_call) end), + recv_local_call(Local, [local_call]). + +recv_local_call(Local, Args) -> + case lists:member(local, Local) of + false -> + ok; + true -> + ?CT(?MODULE, exported_wrap, Args) + end, + case lists:member(meta, Local) of + false -> + ok; + true -> + ?CTT(?MODULE, exported_wrap, Args) + end, + ok. + +combinations([_]=One) -> + [One]; +combinations([H|T]) -> + Cs = combinations(T), + [[H|C] || C <- Cs] ++ Cs. stack_grow_test() -> ?line setup([call,return_to]), -- cgit v1.2.3