linux-kernel - Re: [PATCH v4 2/3] tracing/probes: Add fprobe events for tracing function entry and exit.

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Message-Id: <20230410091143.2a0f581740a4c6fe26647bc3@kernel.org>
Date:   Mon, 10 Apr 2023 09:11:43 +0900
From:   Masami Hiramatsu (Google) <mhiramat@...nel.org>
To:     "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Cc:     linux-trace-kernel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Steven Rostedt <rostedt@...dmis.org>,
        Florent Revest <revest@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        Will Deacon <will@...nel.org>
Subject: Re: [PATCH v4 2/3] tracing/probes: Add fprobe events for tracing
 function entry and exit.

On Sat,  1 Apr 2023 23:34:17 +0900
"Masami Hiramatsu (Google)" <mhiramat@...nel.org> wrote:

> index 000000000000..e9e071af243d
> --- /dev/null
> +++ b/kernel/trace/trace_fprobe.c
> @@ -0,0 +1,1073 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Fprobe-based tracing events
> + * Copyright (C) 2022 Google LLC.
> + */
> +#define pr_fmt(fmt)	"trace_fprobe: " fmt
> +
> +#include <linux/security.h>
> +#include <linux/fprobe.h>
> +#include <linux/module.h>
> +#include <linux/uaccess.h>
> +#include <linux/rculist.h>
> +
> +#include "trace_dynevent.h"
> +#include "trace_probe.h"
> +#include "trace_probe_kernel.h"
> +#include "trace_probe_tmpl.h"
> +
> +#define FPROBE_EVENT_SYSTEM "fprobes"
> +#define RETHOOK_MAXACTIVE_MAX 4096
> +
> +static int trace_fprobe_create(const char *raw_command);
> +static int trace_fprobe_show(struct seq_file *m, struct dyn_event *ev);
> +static int trace_fprobe_release(struct dyn_event *ev);
> +static bool trace_fprobe_is_busy(struct dyn_event *ev);
> +static bool trace_fprobe_match(const char *system, const char *event,
> +			int argc, const char **argv, struct dyn_event *ev);
> +
> +static struct dyn_event_operations trace_fprobe_ops = {
> +	.create = trace_fprobe_create,
> +	.show = trace_fprobe_show,
> +	.is_busy = trace_fprobe_is_busy,
> +	.free = trace_fprobe_release,
> +	.match = trace_fprobe_match,
> +};
> +
> +/*
> + * Kprobe event core functions

Oops, I forgot to update this comment. Let me update it.

Thanks,


-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>