linux-kernel - Re: kernelshark plugins and ftrace array fields

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Message-ID: <4C7FB603.60609@redhat.com>
Date:	Thu, 02 Sep 2010 17:34:43 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	linux-kernel <linux-kernel@...r.kernel.org>,
	KVM list <kvm@...r.kernel.org>
Subject: Re: kernelshark plugins and ftrace array fields

  On 09/02/2010 05:25 PM, Steven Rostedt wrote:
> On Thu, 2010-09-02 at 15:19 +0300, Avi Kivity wrote:
>> I'd like to add enhance kvm_emulate_insn display in kernelshark to
>> show the disassembly of the instruction being emulated.  However,
>> pevent_get_field_val() doesn't support arrays (the instruction is
>> provided in a 15-byte array).
>>
>> Can you add support for arrays in the kernelshark API?  With that, it
>> looks like adding disassembly output to the kvm plugin should be quite
>> simple.
>>
> Sure, I could add a pevent_get_field_array() or something. Could you
> tell me the event and give me an example of what you want to do.

plugin_kvm.c:

kvm_emulate_insn_handler()
{
    fetch insn array and len field
    feed into disassembler
    trace_seq_printf() the disassembled instruction
}

-- 
error compiling committee.c: too many arguments to function

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