linux-kernel - Re: [PATCH tracing/kprobes v4] perf: Add perf probe subcommand for kprobe-event setup helper

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Date:	Mon, 12 Oct 2009 20:07:52 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...e.hu>,
	lkml <linux-kernel@...r.kernel.org>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Christoph Hellwig <hch@...radead.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	"Frank Ch. Eigler" <fche@...hat.com>
Subject: Re: [PATCH tracing/kprobes v4] perf: Add perf probe subcommand for
	kprobe-event setup helper

On Thu, Oct 08, 2009 at 05:17:38PM -0400, Masami Hiramatsu wrote:
> +#ifdef DEBUG
> +#define debug(fmt ...)	\
> +	fprintf(stderr, "DBG(" __FILE__ ":" stringify(__LINE__) "): " fmt)
> +#else
> +#define debug(fmt ...)	do {} while (0)
> +#endif



We have that too:

int eprintf(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
int dump_printf(const char *fmt, ...) __attribute__((format(printf, 1, 2)));



> +#define ERR_IF(cnd)	\
> +	do { if (cnd) {	\
> +		fprintf(stderr, "Error (" __FILE__ ":" stringify(__LINE__) \
> +			"): " stringify(cnd) "\n");			\
> +		exit(1);						\
> +	} } while (0)


And that would be nice to have in util/debug.h but more
perhaps more as a DIE_IF()

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