GNU bug report logs - #18995
Error: Could not reserve dynamic heap area.

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Package: emacs;

Reported by: Alexander Shukaev <haroogan <at> gmail.com>

Date: Sat, 8 Nov 2014 15:24:01 UTC

Severity: normal

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #49 received at 18995 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: 18995 <at> debbugs.gnu.org
Cc: eliz <at> gnu.org, haroogan <at> gmail.com
Subject: Re: bug#18995: Error: Could not reserve dynamic heap area.
Date: Sun, 09 Nov 2014 17:35:30 +0100

Eli Zaretskii <eliz <at> gnu.org> writes:

> It looked like a GCC bug at first, but as I tried to modify the source
> and look at the effect of that on the generated code, it finally
> dawned on me: GCC's loop-unrolling code simply correctly calculated
> that with the initial value of 0x68000000 and decrement of 0x00800000,
> the value of 'size' in the loop will never be less than 0x00100000,
> due to wraparound in the subtraction of unsigned values.

Before wraping around, size will become zero, which is definitely less
than 0x00100000.

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."
This bug report was last modified 10 years and 196 days ago.

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