Re: Apache segmentation fault when loading libphp7.so

On 13.08.2020 at 14:47, Kai Fürstenberg wrote: > Am 13.08.2020 um 14:34 schrieb Christoph M. Becker: > >> On 13.08.2020 at 13:47, Kai Fürstenberg wrote: >> >>> Am 13.08.2020 um 12:53 schrieb Christoph M. Becker: >>> >>>> On 13.08.2020 at 11:52, Kai Fürstenberg wrote: >>>> >>>>> Am 13.08.2020 um 10:31 schrieb Christoph M. Becker: >>>>> >>>>>> On 12.08.2020 at 18:09, Kai Fürstenberg wrote: >>>>>> >>>>>>> Hello everybody, >>>>>>> >>>>>>> and thank you for you help so far. >>>>>>> >>>>>>> I played around with gdb a little bit. >>>>>>> >>>>>>> I re-configured php the way I did in 7.2 (just with some slight >>>>>>> modifications), to use mysql, gd and some other things. >>>>>>> >>>>>>> But this time, httpd stops with >>>>>>> >>>>>>> Program received signal SIGSEGV, Segmentation fault. >>>>>>> resolve_stripslashes () at >>>>>>> /usr/src/apache_testing/php-7.4.9/Zend/zend_cpuinfo.h:157 >>>>>>> 157             __builtin_cpu_init(); >>>>>>> >>>>>>> Before I had the fault >>>>>>> >>>>>>> #0  resolve_base64_decode () at >>>>>>> /usr/src/apache_testing/php-7.4.9/Zend/zend_cpuinfo.h:141 >>>>>>> >>>>>>> Line 141 of zend_cpuinfo.h is the very same command >>>>>>> __builtin_cpu_init() >>>>>>> >>>>>>> It seems, that exactly this command __builtin_cpu_init() fails for some >>>>>>> reason... >>>>>> >>>>>> Did you check config.log? There is a test for __builtin_cpu_init() >>>>>> availability[1] which apparently succeeds on your system, but it's >>>>>> worth >>>>>> to actually look that up in config.log. Maybe this test should use >>>>>> AC_RUN_IFELSE instead of AC_LINK_IFELSE (and have the then and else >>>>>> branch of the ternary operator swapped)? >>>>>> >>>>>> [1] >>>>>> >>>>>> <https://github.com/php/php-src/blob/php-7.3.21/acinclude.m4#L3261-L3278> >>>>> >>>>> config.log: >>>>> configure:13702: checking for __builtin_cpu_init >>>>> configure:13718: cc -o conftest -g -O2 -fvisibility=hidden -pthread >>>>> -D_REENTRANT conftest.c -lm -ldl -lpthread >&5 >>>>> configure:13718: $? = 0 >>>>> configure:13721: result: yes >>>>> configure:13741: checking for __builtin_cpu_supports >>>>> configure:13757: cc -o conftest -g -O2 -fvisibility=hidden -pthread >>>>> -D_REENTRANT conftest.c -lm -ldl -lpthread >&5 >>>>> configure:13757: $? = 0 >>>>> configure:13760: result: yes >>>>> >>>>> I just don't understand what you mean with the link... >>>> >>>> I basically suggested to apply >>>> >>>> <https://gist.github.com/cmb69/3fd0106ce78446c9e10e54eec21a4d82>, >>>> and to >>>> run ./configure again. Would the result still be "yes"? >>> >>> OK, so far so good. >>> >>> I just wonder, which file you want me to patch, because my acinclude.m4 >>> (in Zend subfolder, v7.3) only has about 200 lines (the mentioned part >>> is missing in this file) and in 7.4 this file is completely missing... >> >> The patch is about acinclude.m4 in the toplevel folder: >> >> <https://github.com/php/php-src/blob/php-7.3.21/acinclude.m4>. > > This file is not available in 7.4. In 7.3 it's there, but not 7.4. > I can try 7.3 with your patch. Just gimme some time and see if this works. For PHP 7.4, the relevant code has been moved to build/php.m4, where you could apply the patch manually. -- Christoph M. Becker