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Date: Mon, 17 Nov 2014 09:18:12 +0800
From: 黄建忠 <jianzhong.huang@...oft.com.cn>
To: musl@...ts.openwall.com, Rich Felker <dalias@...c.org>
Subject: Re: Possible bug: MINSIGSTKSZ values
Hi, Rich,
If that means some opensource projects need to be modified to fit Musl,
would you consider to add a "__MUSL__" macro?
I think such a special macro will make upstream patch easy to be accepted.
在 11/15/14 11:18, Rich Felker 写道:
> Currently musl has MINSIGSTKSZ hard-coded as 2048. This is
> insufficient to store the ucontext_t for many archs. I'd like to keep
> it small on archs where that's possible, but the current value might
> not even work for modern x86 with large AVX state, etc. that needs to
> be saved. I don't have a proposed fix yet, but I think we should
> survey the values that are needed for different archs and either make
> it vary per-arch, or if they're all comparable, just increase the
> value to something that works for all archs.
>
> Note that the min pthread stack size is also well below the size of
> ucontext_t for many archs, but I don't think this is a problem. If you
> make a thread with a stack smaller than MINSIGSTKSZ+epsilon, you just
> need to start it with all signals blocked and leave them blocked (or
> avoid using signal handlers at all).
>
> Rich
>
--
Huang JianZhong
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