Messages in this thread Patch in this message | | | Date | Mon, 07 Sep 2009 16:13:18 +0800 | From | Li Zefan <> | Subject | [PATCH 3/6] tracing/syscalls: Add profile filter support |
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This makes syscall profile events filter-able.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> --- include/linux/syscalls.h | 14 ++++++++++---- kernel/trace/trace_syscalls.c | 9 +++++++-- 2 files changed, 17 insertions(+), 6 deletions(-)
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index a8e3782..510d941 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -103,30 +103,36 @@ struct perf_counter_attr; static int prof_sysenter_enable_##sname(struct ftrace_event_call *event_call) \ { \ int ret = 0; \ - if (!atomic_inc_return(&event_enter_##sname.profile_count)) \ + if (!atomic_inc_return(&event_call->profile_count)) \ ret = reg_prof_syscall_enter("sys"#sname); \ return ret; \ } \ \ static void prof_sysenter_disable_##sname(struct ftrace_event_call *event_call)\ { \ - if (atomic_add_negative(-1, &event_enter_##sname.profile_count)) \ + if (atomic_add_negative(-1, &event_call->profile_count)) { \ unreg_prof_syscall_enter("sys"#sname); \ + tracepoint_synchronize_unregister(); \ + destroy_profile_preds(event_call); \ + } \ } #define TRACE_SYS_EXIT_PROFILE(sname) \ static int prof_sysexit_enable_##sname(struct ftrace_event_call *event_call) \ { \ int ret = 0; \ - if (!atomic_inc_return(&event_exit_##sname.profile_count)) \ + if (!atomic_inc_return(&event_call->profile_count)) \ ret = reg_prof_syscall_exit("sys"#sname); \ return ret; \ } \ \ static void prof_sysexit_disable_##sname(struct ftrace_event_call *event_call) \ { \ - if (atomic_add_negative(-1, &event_exit_##sname.profile_count)) \ + if (atomic_add_negative(-1, &event_call->profile_count)) { \ unreg_prof_syscall_exit("sys"#sname); \ + tracepoint_synchronize_unregister(); \ + destroy_profile_preds(event_call); \ + } \ } #define TRACE_SYS_ENTER_PROFILE_INIT(sname) \ diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index 8712ce3..c2faf98 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -414,7 +414,10 @@ static void prof_syscall_enter(struct pt_regs *regs, long id) rec->nr = syscall_nr; syscall_get_arguments(current, regs, 0, sys_data->nb_args, (unsigned long *)&rec->args); - perf_tpcounter_event(sys_data->enter_id, 0, 1, rec, size); + + if (profile_filter_check(sys_data->enter_event, &rec)) + perf_tpcounter_event(sys_data->enter_id, 0, 1, + rec, size); } while(0); } @@ -476,7 +479,9 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret) rec.nr = syscall_nr; rec.ret = syscall_get_return_value(current, regs); - perf_tpcounter_event(sys_data->exit_id, 0, 1, &rec, sizeof(rec)); + if (profile_filter_check(sys_data->exit_event, &rec)) + perf_tpcounter_event(sys_data->exit_id, 0, 1, + &rec, sizeof(rec)); } int reg_prof_syscall_exit(char *name) -- 1.6.3
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