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Re: [PATCH] stack: Add new '-n MAXFRAMES' option. Resolve addresses after unwind.
- From: Pedro Alves <palves at redhat dot com>
- To: elfutils-devel at lists dot fedorahosted dot org
- Date: Mon, 06 Jan 2014 12:57:49 +0000
- Subject: Re: [PATCH] stack: Add new '-n MAXFRAMES' option. Resolve addresses after unwind.
On 01/03/2014 10:23 PM, Mark Wielaard wrote:
> But I don't agree that there shouldn't be any limit in eu-stack by default.
> Generating hunderd thousands lines of output is not a good default.
Are you thinking of users typing in the terminal? IMO if the user
asks for the backtrace, she should get it. gdb's backtrace limit is
also unlimited by default. Paging, a-la git, gdb, (or external), is
better to handle long output IMO, as the user can then decide to cancel
at any time (q, ctrl-c, etc.), but failing that, applying a default
limit only when stdin is a tty would still be better, IMO. That would keep
compatibility with existing programmatic uses (scripts, etc.), which
now will possibly start getting truncated backtraces, unless they're
adjusted to use "-n" (and I assume they'll need to take care to not
use it with older elfutils that doesn't know about "-n".)
> With -n 0 users now have the choice which they prefer.