[cfe-dev] Optionally suppress debug info for inlined calls?

[David Blaikie]

On Mon, Nov 25, 2013 at 11:18 AM, Robinson, Paul <
Paul_Robinson at playstation.sony.com> wrote:

>  I have _*already*_ turned it off for my target,
>

Right, I got that - was just trying to understand if/why that was the right
choice.


> per request from licensees who don’t like seeing fake call frames that
> don’t reflect actual calls in the generated code.
>

Just tossing around ideas to accommodate your licensees/Clang users: would
this make more sense as a feature of debuggers/stack trace tools, etc? Are
there particular places where this shows up and confuses users?


> The size win doesn’t hurt but is secondary.
>
>
>
> The problem now is that not everybody likes it that way, and so I want to
> make it optional, and I’d rather have the feature upstream than keep it
> private.
>
>
>
> (While I’m not ready to file any bugs, I did notice some strangeness in
> the low/hi_pc ranges for some inlined ctors; the ranges mostly or
> completely overlapped, which didn’t seem right but I didn’t look into it.
> That’s not my focus right now.)
>
> --paulr
>
>
>
> *From:* David Blaikie [mailto:dblaikie at gmail.com]
> *Sent:* Monday, November 25, 2013 11:02 AM
> *To:* Robinson, Paul
> *Cc:* cfe-dev at cs.uiuc.edu
> *Subject:* Re: [cfe-dev] Optionally suppress debug info for inlined calls?
>
>
>
> Why do you want to turn this off?
>
> Is it buggy? Could we fix it?
> Is it too big? Could we reduce size in ways that are strict-wins instead?
>
>
>
> On Mon, Nov 25, 2013 at 10:57 AM, Robinson, Paul <
> Paul_Robinson at playstation.sony.com> wrote:
>
> In general on our platform we don't want debug info for inlined calls
> (messy, awkward things) but some people still like to see them.  Currently
> we turn them off unconditionally in our private tree, but we'd like to put
> this under command-line control and send it upstream.  Does anyone mind if
> I do this?  I was thinking a command-line option along the lines of
>       -g[no-]inlined-scopes
> We'd default to No on our target, Yes everywhere else.  If you turn these
> off, you don't get DW_TAG_inlined_scope, and the source location info for
> all the inlined code becomes the call site (single-stepping would act like
> it's an external call that you step over).
>
> Thanks,
> --paulr
>
>
>
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>
>
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