[Ffmpeg-devel] Re: [BUG] Compilation failure when using --disable-opts

[Panagiotis Issaris]

Hi M?ns,

M?ns Rullg?rd schreef:
> Diego Biurrun <diego at biurrun.de> writes:
>> On Thu, Mar 15, 2007 at 08:03:58PM -0300, Ramiro Polla wrote:
>>> M?ns Rullg?rd escreveu:
>>>> Panagiotis Issaris <takis at issaris.org> writes:
>>>>  
>>>>> Sure. Although I wonder: Doesn't anybody in here use a debugger? Aren't
>>>>> you annoyed by the jumping around because of reorderings caused by the
>>>>> compilers' optimizations?
>>>> That's what makes debugging fun.  It gets even better on MIPS with
>>>> delayed branching...
>>>>
>>>> Actually, I don't use debuggers a whole lot.  I find a generous
>>>> measure of printf works much better in most cases.
>>> You should try Microsoft Visual Studio =) It will totally change your 
>>> debugging experience.
>>>
>>> (yes, I know. It doesn't debug .stabs..)
>> IIRC Mans knows Visual Studio.
> 
> I have probably used more debuggers than most of you, none of them
> particularly impressive, and Visual Studio worse than most.
> 
> What I'm trying to get at is that a debugger might often let you see a
> snapshot of the process state whenever you stop it, typically at a
> breakpoint.  What it will not do is tell you how the process got into
> that state.  Placing print statements in strategic places will produce
> a log telling you exactly what has happened.  The trick is in printing
> the right information at the right places.
There's tracepoints for that.

> Before you ask, I know single-stepping is possible.  It's just not
> practical to single-step for three days waiting for the special
> condition to arise, at the same time mentally tracking the state in
You can use conditional breakpoints for that :)

> some vain hope to spot the point where things go wrong.  Debuggers
> can also interfere with the execution, especially timing, in ways that
> might cause the bug to never manifest itself.
This is IMHO the most problematic thing with debuggers. But if timing
isn't concerned debuggers are useful (again IMHO).

> I appreciate that different people will find themselves more
> comfortable with different techniques, and no single debugging method
> is the best for everybody.  That said, I have a reputation at work for
> quickly finding difficult bugs after others have failed...
> 
>> May I take bets who is going to survive the upcoming flamewar unscathed?
> 
> What war?
> 



With friendly regards,
Takis
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