Re: LuaJIT optimization bug?

[Pierre Chapuis <catwell@...>]

On Wed, 17 Aug 2011 14:38:31 +0200, Mike Pall wrote:

> unpack() is not compiled, i.e. the trace is aborted there.

Nice to know.

> > >  local bit_set_1 = function(_bset,_byte,_bit)
> > >    _bset[_byte] = bor(bset[_byte],bmask_1[_bit])
> > >  end

> The function as written above certainly doesn't work. You mix
> _bset and bset (without underscore).

That's a typo that is not in the original code, sorry.

> Even if that's just a typo, there's a high likeliness you're
> overflowing a buffer somewhere (e.g. due to mixup of 0-based vs.
> 1-based indexing).

I have added an explicit assertion in my Lua source to check that,
and it is not triggered.

> Try running under the memcheck tool of Valgrind
> (see src/Makefile, -DLUAJIT_USE_SYSMALLOC -DLUAJIT_USE_VALGRIND,
> CCDEBUG=-g).

Apparently I cannot do that on x86_64?

> Also try to enable assertions.

Done, changes nothing.

--
Pierre 'catwell' Chapuis