Re: [PATCH 17/18] tracing: Add indirect to indirect access for function based events
From: Namhyung Kim <namhyung@kernel.org>
Date: 2018-02-13 09:27:45
Also in:
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From: Namhyung Kim <namhyung@kernel.org>
Date: 2018-02-13 09:27:45
Also in:
lkml
Hi Steve, On Mon, Feb 12, 2018 at 12:23:54PM -0500, Steven Rostedt wrote:
On Mon, 12 Feb 2018 11:15:34 +0900 Namhyung Kim [off-list ref] wrote:quoted
quoted
It should have been: return process_redirects(arg, val, buf);But I think you need to consider data type of the arg when dereferencing the last redirect.What for?
Otherwise it'd return a value of unsigned long type regardless of the type of the arg. I thought it should have same logic as indirect args. But it seems not matter since record_entry() would copy it only for the arg->size. Then type check in __get_arg() might be unnecessary too.
Also this code has also changed. I haven't posted new patches but my latest is in my git tree in the branch ftrace/dynamic-ftrace-events.
I've checked it. And it seems to have another problem for indirect (but not redirect) arrays and strings. Like 'x32[1] foo[2]'? Thanks, Namhyung