posix_fadvise() does not work correctly with _LARGE_FILES on 32-bit AIX
test/ruby/test_io.rb fails on AIX.
[ 1/170] TestIO#test_advise = 0.01 s 1) Error: TestIO#test_advise: Errno::EINVAL: Invalid argument - /tmp/test_io20140606-7733390-1xgpc07 /ss/home/rayod/Dev/Contribution/ruby-trunk-blue1/test/ruby/test_io.rb:2437:in `advise' /ss/home/rayod/Dev/Contribution/ruby-trunk-blue1/test/ruby/test_io.rb:2437:in `block (4 levels) in test_advise' /ss/home/rayod/Dev/Contribution/ruby-trunk-blue1/test/ruby/test_io.rb:2436:in `open' /ss/home/rayod/Dev/Contribution/ruby-trunk-blue1/test/ruby/test_io.rb:2436:in `block (3 levels) in test_advise' /ss/home/rayod/Dev/Contribution/ruby-trunk-blue1/test/ruby/test_io.rb:2435:in `each' /ss/home/rayod/Dev/Contribution/ruby-trunk-blue1/test/ruby/test_io.rb:2435:in `block (2 levels) in test_advise' /ss/home/rayod/Dev/Contribution/ruby-trunk-blue1/test/ruby/test_io.rb:2434:in `each' /ss/home/rayod/Dev/Contribution/ruby-trunk-blue1/test/ruby/test_io.rb:2434:in `block in test_advise' /ss/home/rayod/Dev/Contribution/ruby-trunk-blue1/test/ruby/test_io.rb:1442:in `make_tempfile' /ss/home/rayod/Dev/Contribution/ruby-trunk-blue1/test/ruby/test_io.rb:2432:in `test_advise'
It is very strange, but the current AIX does not seem to support a 32-bit call to
_LARGE_FILES is defined.
Until it is supported, we need this ugly patch to not call
--- io.c (revision 46310) +++ io.c (working copy) @@ -8586,7 +8586,10 @@ off = NIL_P(offset) ? 0 : NUM2OFFT(offset); l = NIL_P(len) ? 0 : NUM2OFFT(len); -#ifdef HAVE_POSIX_FADVISE + /* AIX currently does not support a 32-bit call to posix_fadvise() + * if _LARGE_FILES is defined. + */ +#if defined(HAVE_POSIX_FADVISE) && !(defined(_AIX) && defined(_LARGE_FILES) && !defined(_ARCH_PPC64)) return do_io_advise(fptr, advice, off, l); #else ((void)off, (void)l); /* Ignore all hint */
FYI, detailed explanation follows:
The 2nd and 3rd arguemnts to
posix_fadvise() are the
off_t type. If
_LARGE_FILES is defined,
off_t is defined as
long long int on the caller side. This means the 2nd and 3rd arguments are passed using two registers each on a 32-bit environment. However, the callee side does not support
off_t is assumed to be
long int, which is passed using one register. As a result, the callee side can not receive a correct value for the 4th argument,
int advice, throwing EINVAL.
Updated by kanemoto (Yutaka Kanemoto) about 6 years ago
- Status changed from Open to Closed
- % Done changed from 0 to 100
Applied in changeset r46382.
io.c (rb_io_advise): AIX currently does not support a 32-bit call to
posix_fadvise() if _LARGE_FILES is defined. Patch by Rei Odaira.
[ruby-core:62968] [Bug #9914]
Updated by ReiOdaira (Rei Odaira) almost 6 years ago
I am not familiar with autoconf, but shoundn't this be
--- configure.in (revision 47818) +++ configure.in (working copy) @@ -1207,7 +1207,7 @@ [ # AIX currently does not support a 32-bit call to posix_fadvise() # if _LARGE_FILES is defined. - ac_cv_posix_fadvise=no + ac_cv_func_posix_fadvise=no ]) ])