From: Simon Marchi <simon.marchi@polymtl.ca>
To: vijay nag <vijunag@gmail.com>
Cc: gdb@sourceware.org
Subject: Re: amd64 executable debugging
Date: Sat, 24 Mar 2018 17:03:00 -0000 [thread overview]
Message-ID: <d3802e89a10ea2e1bb56a61b9de28712@polymtl.ca> (raw)
In-Reply-To: <CAKhyrx8vBjMg+140b8XWLnw92-J1oh206sO6UOtR7X7BCnDL+w@mail.gmail.com>
On 2018-03-24 09:14, vijay nag wrote:
> Hello GDB,
>
> Most often while debugging amd64 executable, GDB throws '<variable
> optimized out>' error and also sometimes when function parameters are
> passed on register GDB reports incorrect information in few frames. I'm
> sure in 64 bit with more registers available, there is more revenue for
> optimization, it is entirely possible that GDB gets confused due to
> that
> and information provided by GDB isn't reliable sometimes. I'm
> wondering if
> the latest GDB has somehow solved this problem Or disassembling and
> studying instructions is the only way to go about it ? Also, is there a
> way
> to increase this debug-ability by adding any additional compiler flags
> ?
>
> --Vijay--
Hi Vijay,
You didn't mention it so I'll state the obvious, do you build without
optimizations (-O0)? Otherwise, it's expected to have some optimized
out values.
Simon
next prev parent reply other threads:[~2018-03-24 17:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
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2018-03-24 13:14 ` vijay nag
2018-03-24 17:03 ` Simon Marchi [this message]
2018-03-25 6:02 ` vijay nag
2018-03-25 6:04 ` vijay nag
2018-03-25 11:35 ` Simon Marchi
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