From: Daniel Jacobowitz <drow@false.org>
To: Igor Khavkine <igor.kh@gmail.com>
Cc: gdb@sourceware.org
Subject: Re: C99 variable length arrays
Date: Thu, 26 Jan 2006 15:08:00 -0000 [thread overview]
Message-ID: <20060126134926.GA3501@nevyn.them.org> (raw)
In-Reply-To: <ab2dc45b0601260541s5b9c3886nec50e813bbd61130@mail.gmail.com>
On Thu, Jan 26, 2006 at 08:41:46AM -0500, Igor Khavkine wrote:
> [First posted to bug-gdb@gnu.org, but that list looks rather dead.]
>
> I'm using GDB to debug some code that uses local variable length
> arrays. This feature is available for C as of the C99 standard. GCC
> has support for it.
>
> Sadly, GDB doesn't seem to be smart enough to figure out the size of
> the arrays at run time. This leads to things like 'print array[1][2]'
> at the GDB prompt not printing the same value as would 'printf("%g\n",
> array[1][2])' in the code. This is a problem for multidimensional
> arrays especially. Needless to say, this makes the code more difficult
> to debug.
The first thing to do is to write a small testcase, and post the
testcase along with the debugging output that your GCC generates
for it.
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2006-01-26 13:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-26 13:49 Igor Khavkine
2006-01-26 15:08 ` Daniel Jacobowitz [this message]
2006-01-26 23:33 ` Igor Khavkine
2006-01-27 0:02 ` Daniel Jacobowitz
2006-01-27 8:15 ` Igor Khavkine
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