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Postings from July 2013
On Wed, Jul 24, 2013 at 11:56:46AM -0400, bulk 88 wrote: > ---------------------------------------- > > From: xdg@xdg.me > > Date: Wed, 24 Jul 2013 11:50:22 -0400 > > Subject: Re: upcoming release of 5.18.1 > > CC: perl5-porters@perl.org > > * The OP allocation code now returns correctly aligned memory in all > > cases for "struct pmop". Previously it could return memory only > > aligned to a 4-byte boundary, which is not correct for an ithreads > > build with 64 bit IVs on some 32 bit platforms. Notably, this caused > > the build to fail completely on sparc GNU/Linux. [RT #118055] > > > > That would break ABI/XS between maint releases. Why so? We've not changed any public headers, and we're *tightening* the alignment constraint. Allocations are now 8 byte aligned (as they should have been all along for that structure for those platforms), so anything only assuming the previous 4 byte alignment will be fine. Also, it's been tested and fixes the crash on the affected platforms, and hasn't broken any others. Hence I believe that it's suitable compatible to go in - XS extensions compiled against v5.18.0 will still work when loaded by v5.18.1 Nicholas ClarkThread Previous | Thread Next