Subject: Re: [std-proposals] Adding stacktrace to std::exception
From: Henry Miller (hank_at_[hidden])
Date: 2020-11-13 10:43:25
The default needs to be 0: not all C++ systems are PCs with a ton of memory, some of us have to fight for single bytes. I also have to deal with early 1990s encryption what is insecure for now-obsolete legal reasons and everything I can do to keep those details private by default is important.
-- Henry Miller hank_at_[hidden] On Fri, Nov 13, 2020, at 10:24, Thiago Macieira via Std-Proposals wrote: > On Friday, 13 November 2020 00:56:39 PST Marcin Jaczewski wrote: > > > Also, stack traces' size are not known at compile time, unlike exceptions > > > classes. > > > > Do we need a full stack trace to be this useful? > > Let say that Standard guarantees only last 20 positions from it. > > Rest will be available only if there is free memory for it. > > Don't ask me. But this is a reasonable question: what is the minimum viable > solution in case memory allocation fails? Is a backtrace simply a pointer per > frame? > > Note that increasing the size of the emergency per-thread exception buffer > means memory gets allocated for everyone, whether they use it or not. There's > a cost in this. Adding 20 pointers (160 bytes) may not be too bad, except ... > you know... when you're out of memory. So the fact that you reserved space for > when you're out of memory could be the cause that you're out of memory. > > -- > Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org > Software Architect - Intel DPG Cloud Engineering > > > > -- > Std-Proposals mailing list > Std-Proposals_at_[hidden] > https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals >
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