ID: 48668 Comment by: sriram dot natarajan at gmail dot com Reported By: dmda at yandex dot ru Status: Critical Bug Type: Reproducible crash Operating System: Solaris PHP Version: 5.3.0RC4 Assigned To: dsp New Comment:
i have been looking into this issue over the week end and here is what i found. a) this is memory alignment issue and nothing to do with compilers or optimizations. hence, bug - 47230 (http://bugs.php.net/bug.php?id=47230&edit=1) should be closed as duplicate of this bug. now, why this is happening ? here is a rough and crude explanation : with php 5.3, addresses returned from zend_vm_stack_top , _get_zval_ptr_tmp etc are not 8 byte aligned. hence, accessing the 8 byte data results in crashes. i haven't come up with a solution yet. i will look more into this after next week. Previous Comments: ------------------------------------------------------------------------ [2009-08-10 21:44:07] dmda at yandex dot ru > by any chance, the submitter built this php5.3 on one machine > and ran it on another machine ? no. > currently, php 5.3 build process includes -xtarget=native > within the configure flags when used with sun studio compiler. I used only gcc which is available from sunfreeware. It did never create any problems with various applications I compiled with it, including php versions from 4.0.6 up to 5.2.10. ------------------------------------------------------------------------ [2009-08-10 21:24:58] srina...@php.net by any chance, the submitter built this php5.3 on one machine and ran it on another machine ? currently, php 5.3 build process includes -xtarget=native within the configure flags when used with sun studio compiler. this would mean that this compiled program will not work on different class of sparc machines (unless recompiled for that platform) for e.g, if some one currently built php 5.3 on ultra-sparc III+/IV+ based system (like v410, v220, v880 etc) then if they try to run the same on older hardware with chips like sparc II+ hardware, then they might run into crash. ------------------------------------------------------------------------ [2009-07-28 14:25:31] d...@php.net PHP is broken on Sparc (and possible every other processor that requires memalignment) at the moment ------------------------------------------------------------------------ [2009-06-26 15:42:15] d...@php.net It looks like this is a memalign issue. PHP 5.3.0 is now build with flags to avoid the crash. I assign the bug to me to provide a proper fix for the issue for 5.3.1 ------------------------------------------------------------------------ [2009-06-24 12:21:10] johan...@php.net When using --enable-dbug the code works, without --enable-debug the code fails, maybe that's the reason why I didn't see this before. uname -a SunOS techra46 5.8 Generic_117350-54 sun4u sparc SUNW,Sun-Fire-V210 The issue seems to be independent from the compiler but in some way system dependent, another similar box worked for me. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/48668 -- Edit this bug report at http://bugs.php.net/?id=48668&edit=1
