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From: "Daniel Shahaf" <d.s@daniel.shahaf.name>
To: "Peter Stephenson" <p.stephenson@samsung.com>
Cc: zsh-users@zsh.org, "Dennis Schwartz" <dennis.schwartz@protonmail.com>
Subject: Re: TRAPINT doesn't work reliably
Date: Fri, 27 Sep 2019 13:43:14 +0000	[thread overview]
Message-ID: <c2acffef-b127-42b8-be46-45a53477f8ba@www.fastmail.com> (raw)
In-Reply-To: <1569511631.3770.8.camel@samsung.com>

Peter Stephenson wrote on Thu, 26 Sep 2019 15:27 +00:00:
> On Wed, 2019-09-25 at 18:46 +0000, Daniel Shahaf wrote:
> > Peter Stephenson wrote on Wed, Sep 25, 2019 at 18:04:45 +0100:
> > > 
> > > On Wed, 2019-09-25 at 16:25 +0000, Dennis Schwartz wrote:
> > > > 
> > > > I haven't tried compiling from the latest source code yet. If this is
> > > > desired I could try this again at a later point in time.
> > > I suspect that's going to have to be the next step, if you get the
> > > chance.  In the top-level directory, run configure as
> > > 
> > > ./configure --enable-zsh-debug
> > > 
> > Should Dennis use any of these flags as well? —
> 
> It's not clear anything else is going to help debugging, certainly
> if the build that's showing the problem was made (as almost all
> distro builds are made) using the system allocators.  In that
> case none of the zsh memory specials apply,

Even without any special configure flags, there's still zhalloc().  The source
of zhalloc() contains some blocks conditional on --enable-zsh-valgrind.
I assume passing that configure flag will let valgrind detect use-after-freeheap()
bugs.

Also, I thought --enable-zsh-secure-free and --enable-zsh-heap-debug were
independent of --enable-zsh-mem*.

> and if we turn on zsh memory management we are in a different world
> --- which might shows the problem but could well perturb it somewhere
> completely different.

Sure, any change could make the symptoms disappear, particularly
switching to a different allocator.

Cheers,

Daniel

  reply	other threads:[~2019-09-27 13:44 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20190917164905epcas1p4ad458ffcd504501780d522880c81de3e@epcas1p4.samsung.com>
2019-09-17 16:47 ` Dennis Schwartz
2019-09-24  8:44   ` Peter Stephenson
2019-09-25 13:02     ` Dennis Schwartz
2019-09-25 14:01       ` Peter Stephenson
2019-09-25 16:25         ` Dennis Schwartz
2019-09-25 17:04           ` Peter Stephenson
2019-09-25 18:46             ` Daniel Shahaf
2019-09-26 15:27               ` Peter Stephenson
2019-09-27 13:43                 ` Daniel Shahaf [this message]
2019-09-25 17:56           ` Peter Stephenson
2019-09-26 14:48             ` Dennis Schwartz
2019-09-26 15:25               ` Peter Stephenson
2019-09-26 17:10                 ` Dennis Schwartz
2019-09-27 13:46                   ` Daniel Shahaf
2019-09-28 11:16                     ` Dennis Schwartz
2019-09-28 14:29                       ` Daniel Shahaf
2019-09-28 18:21                         ` Dennis Schwartz
2019-09-28 18:58                           ` Dennis Schwartz
2019-09-28 16:00                       ` Bart Schaefer
2019-09-29 16:54                         ` Peter Stephenson
2019-09-27 19:05                   ` Peter Stephenson

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