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Message-ID: <87lijiw8mp.fsf@rho.meyering.net>
Date: Wed, 20 Jun 2012 13:00:30 +0200
From: Jim Meyering <jim@...ering.net>
To: Bruno Haible <bruno@...sp.org>
Cc: Rich Felker <dalias@...ifal.cx>, musl@...ts.openwall.com, bug-gnulib@....org
Subject: Re: musl, printf out-of-memory test
Bruno Haible wrote:
> Rich Felker wrote:
>> The problem was an obscure pointer-arithmetic overflow ...
>> where the stack pointer is near the 4GB boundary.
>
> This explains also why it occurred only with a certain probability
> outside gdb, but with 100% probability from within gdb: Apparently gdb
> runs the program without address space layout randomization.
That is correct. It is a feature of gdb-7.0 and newer.
You can inspect (watch/break-at/etc.) the same address and expect it
to refer to the same memory location in multiple invocations.
This makes gdb's command-line history even more useful.
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