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Re: bin/44235: lint1 fails when compiling mesa for sparc
The following reply was made to PR bin/44235; it has been noted by GNATS.
From: "Valeriy E. Ushakov" <uwe%stderr.spb.ru@localhost>
Subject: Re: bin/44235: lint1 fails when compiling mesa for sparc
Date: Mon, 17 Jan 2011 15:10:03 +0300
On Mon, Jan 17, 2011 at 08:19:09 +0000, David Laight wrote:
> On Mon, Jan 17, 2011 at 02:05:03AM +0000, Valeriy E. Ushakov wrote:
> > The following reply was made to PR bin/44235; it has been noted by GNATS.
> > From: "Valeriy E. Ushakov" <uwe%stderr.spb.ru@localhost>
> > Date: Mon, 17 Jan 2011 05:00:25 +0300
> > xgetblk doesn't check if the next free block it pick up has enough
> > space for the allocation. We come asking for s=41104 bytes, there
> > isn't enough space in the current block, so we get one from freelist
> > and don't check that it has enough space, so in
> > usr.bin/xlint/lint1/mem1.c
> Is lint using its own 'malloc' built on top of the system one?
> Or is something else going on here??
> If malloc isn't good enough it should be fixed!
I haven't actually read the code :), but I assume it's written that
way to simplify memory management. You can allocate a lot of
transient objects for some context (e.g. an expression or statement)
and then do a bulk free on them when your context dies, instead of
free'ing every one of them (which also requires keeping track of them &c).
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