On Mon, Dec 25, 2017 at 07:56:43AM +0100, ufo19890607 wrote: > From: yuzhoujian <yuzhouj...@didichuxing.com> > > #0 0x00007f044ff447bd in re_compile_fastmap_iter (bufp=0x7f044ff447bd > <re_compile_fastmap_iter+1165>, > fastmap=0x46 <Address 0x46 out of bounds>, > init_state=<optimized out>, init_state=<optimized out>) at regcomp.c:407 > 407 if (__wcrtomb (buf, towlower (cset->mbchars[i]), > &state) > (gdb) bt > #0 0x00007f044ff447bd in re_compile_fastmap_iter (bufp=0x7f044ff447bd > <re_compile_fastmap_iter+1165>, > fastmap=0x46 <Address 0x46 out of bounds>, init_state=<optimized > out>, init_state=<optimized out>) at regcomp.c:407 > #1 0x0000000000831160 in virtual_file_ex (state=0x7fff9c1a4f70, > path=<optimized out>, verify_path=0x0, use_realpath=1) > at /home/xiaoju/phpng/php-7.0.6/Zend/zend_virtual_cwd.c:1335 > #2 0x00000000007aacee in expand_filepath_with_mode ( > filepath=0x7f044d6020d8 > "/home/xiaoju/ep/as/store//toggles/beatles_api_discovery_is_open_by_app", > real_path=0x7fff9c1a4fc0 "\360X\032\234\377\177", > relative_to=<optimized out>, relative_to_len=0, realpath_mode=1) > at > /home/xiaoju/phpng/php-7.0.6/main/fopen_wrappers.c:812 > #3 0x00000000007c1536 in _php_stream_fopen ( > filename=0x7f044d6020d8 > "/home/xiaoju/ep/as/store//toggles/beatles_api_discovery_is_open_by_app", > mode=0xdbb1f1 "rb", > opened_path=0x0, options=0) at > /home/xiaoju/phpng/php-7.0.6/main/streams/plain_wrapper.c:970 > #4 0x00000000007bd084 in _php_stream_open_wrapper_ex ( > path=0x7f044d6020d8 > "/home/xiaoju/ep/as/store//toggles/beatles_api_discovery_is_open_by_app", > mode=0xdbb1f1 "rb", options=8, > opened_path=0x0, context=0x7f044d65f4c0) at > /home/xiaoju/phpng/php-7.0.6/main/streams/streams.c:2060 > #5 0x000000000071722b in zif_file_get_contents (execute_data=<optimized > out>, return_value=0x7f044d615540) > at > /home/xiaoju/phpng/php-7.0.6/ext/standard/file.c:544 > #6 0x000000000065387c in phar_file_get_contents > (execute_data=0x7f044d615570, return_value=0x7f044d615540) > at > /home/xiaoju/phpng/php-7.0.6/ext/phar/func_interceptors.c:224)) > > I add some output info in the php source code, and found that virtual_file_ex > functions's rbp value is really strange,etc 0x1, 0x31. I guess when the perf > collects samples for all the cpus with -g option, it may destroy the > php-fpm's stack. When the perf is running without -g option, the php-fpm is > normal. Who have ever encountered similar problems?
hum, except for speed there shouldn't be other influence on perf-ed program, does it happen always? whats the perf record's command line? it's possible you're hitting some php-fpm race issue due to the speed degradation > BTW, OS in the server: Centos7.3 , Kernel version: > 3.10.0-514.16.1.el7.x86_64. php-fpm version: 7.0.6 > Processor info: Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz is there a single way to reproduce? As already mentioned by Wang, does it happen on recent kernel? thanks, jirka
