>> Also, the Function Graph Tracer modifies the return address of a traced
>> function to a return trampoline to gather tracing data on function return.
>> Stack traces taken from that trampoline and functions it calls are
>> unreliable as the original return address may not be available in
>> th
On 4/9/21 6:31 AM, Mark Brown wrote:
> On Thu, Apr 08, 2021 at 02:23:39PM -0500, Madhavan T. Venkataraman wrote:
>> On 4/8/21 11:58 AM, Mark Brown wrote:
>
>>> This looks good to me however I'd really like someone who has a firmer
>>> understanding of what ftrace is doing to double check as it
On Mon, Apr 05, 2021 at 03:43:12PM -0500, madve...@linux.microsoft.com wrote:
> From: "Madhavan T. Venkataraman"
>
> When CONFIG_DYNAMIC_FTRACE_WITH_REGS is enabled and tracing is activated
> for a function, the ftrace infrastructure is called for the function at
> the very beginning. Ftrace crea
On Thu, Apr 08, 2021 at 02:23:39PM -0500, Madhavan T. Venkataraman wrote:
> On 4/8/21 11:58 AM, Mark Brown wrote:
> > This looks good to me however I'd really like someone who has a firmer
> > understanding of what ftrace is doing to double check as it is entirely
> > likely that I am missing case
On 4/8/21 11:58 AM, Mark Brown wrote:
> On Mon, Apr 05, 2021 at 03:43:12PM -0500, madve...@linux.microsoft.com wrote:
>> From: "Madhavan T. Venkataraman"
>>
>> When CONFIG_DYNAMIC_FTRACE_WITH_REGS is enabled and tracing is activated
>> for a function, the ftrace infrastructure is called for the
On Mon, Apr 05, 2021 at 03:43:12PM -0500, madve...@linux.microsoft.com wrote:
> From: "Madhavan T. Venkataraman"
>
> When CONFIG_DYNAMIC_FTRACE_WITH_REGS is enabled and tracing is activated
> for a function, the ftrace infrastructure is called for the function at
> the very beginning. Ftrace crea
From: "Madhavan T. Venkataraman"
When CONFIG_DYNAMIC_FTRACE_WITH_REGS is enabled and tracing is activated
for a function, the ftrace infrastructure is called for the function at
the very beginning. Ftrace creates two frames:
- One for the traced function
- One for the caller of
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