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Re: [Qemu-devel] Re: [PATCH 5/6] trace-state: [simple] add "-trace event
From: |
Lluís |
Subject: |
Re: [Qemu-devel] Re: [PATCH 5/6] trace-state: [simple] add "-trace events" argument to control initial state |
Date: |
Wed, 06 Apr 2011 16:15:40 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) |
Stefan Hajnoczi writes:
>> + if (len > 1) { /* skip empty lines */
>> + line[len - 1] = '\0';
>> + if (!st_change_trace_event_state(line, true)) {
> The build breaks when --enable-trace-backend != simple because this
> code is outside an #ifdef CONFIG_SIMPLE_TRACE. Please add this:
> diff --git a/simpletrace.h b/simpletrace.h
> index 8d893bd..5d9d2ec 100644
> --- a/simpletrace.h
> +++ b/simpletrace.h
> @@ -43,6 +43,11 @@ static inline bool st_init(const char *file)
> {
> return true;
> }
> +
> +static bool st_change_trace_event_state(const char *tname, bool tstate)
> +{
> + return true;
> +}
> #endif /* !CONFIG_SIMPLE_TRACE */
> #endif /* SIMPLETRACE_H */
Hmmm... why don't simply conditionally call st_init (put it into an
#ifdef) and remove the "#else" in simpletrace.h.
I've looked at it and it's not called from anywhere else.
This also reminds me that I didn't see any "-trace" option parsing in
the OS-specific frontends (at least in linux-user).
Lluis
--
"And it's much the same thing with knowledge, for whenever you learn
something new, the whole world becomes that much richer."
-- The Princess of Pure Reason, as told by Norton Juster in The Phantom
Tollbooth
- [Qemu-devel] [RFC][PATCH 0/6] trace-state: make the behaviour of "disable" consistent across all backends, Lluís, 2011/04/04
- [Qemu-devel] [PATCH 1/6] trace: [ust] fix generation of 'trace.c' on events without args, Lluís, 2011/04/04
- [Qemu-devel] [PATCH 2/6] trace: generalize the "property" concept in the trace-events file, Lluís, 2011/04/04
- [Qemu-devel] [PATCH 3/6] trace-state: always use the "nop" backend on events with the "disable" keyword, Lluís, 2011/04/04
- [Qemu-devel] [PATCH 4/6] trace-state: [simple] disable all trace points by default, Lluís, 2011/04/04
- [Qemu-devel] [PATCH 5/6] trace-state: [simple] add "-trace events" argument to control initial state, Lluís, 2011/04/04
[Qemu-devel] [PATCH 6/6] trace: enable all events, Lluís, 2011/04/04
[Qemu-devel] Re: [RFC][PATCH 0/6] trace-state: make the behaviour of "disable" consistent across all backends, Stefan Hajnoczi, 2011/04/05