Bug #72257 [Fbk->Opn]: "get_defined_constants(true)" core dump

Edit report at https://bugs.php.net/bug.php?id=72257&edit=1 ID: 72257 User updated by: jccgls001 at 126 dot com Reported by: jccgls001 at 126 dot com Summary: "get_defined_constants(true)" core dump -Status: Feedback +Status: Open Type: Bug Package: Scripting Engine problem Operating System: linux 2.6 PHP Version: 7.0.6 Block user comment: N Private report: N New Comment: backtrace is here : ------------------------ Using host libthread_db library "/lib64/tls/libthread_db.so.1". Core was generated by `install/php/bin/php -r get_defined_constants(true);'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x000000302af6ff40 in strlen () from /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/install/php/bin/../../lib/gcc-3.4.5/libc.so.6 (gdb) bt #0 0x000000302af6ff40 in strlen () from /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/install/php/bin/../../lib/gcc-3.4.5/libc.so.6 #1 0x0000000000a652b6 in zif_get_defined_constants (execute_data=0x7f9e74c120a0, return_value=0x7f9e74c12090) at /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/build/php-7.0.6/Zend/zend_builtin_functions.c:2227 #2 0x0000000000ab1781 in ZEND_DO_ICALL_SPEC_HANDLER (execute_data=0x7f9e74c12030) at /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/build/php-7.0.6/Zend/zend_vm_execute.h:586 #3 0x0000000000ab04bc in execute_ex (ex=0x7f9e74c12030) at /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/build/php-7.0.6/Zend/zend_vm_execute.h:417 #4 0x0000000000ab0c66 in zend_execute (op_array=0x7f9e74c610e0, return_value=0x7ffffa23d620) at /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/build/php-7.0.6/Zend/zend_vm_execute.h:458 #5 0x0000000000a18f78 in zend_eval_stringl (str=0x17d4cd0 "get_defined_constants(true);", str_len=28, retval_ptr=0x0, string_name=0x1353fcc "Command line code") at /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/build/php-7.0.6/Zend/zend_execute_API.c:1135 #6 0x0000000000a19135 in zend_eval_stringl_ex (str=0x17d4cd0 "get_defined_constants(true);", str_len=28, retval_ptr=0x0, string_name=0x1353fcc "Command line code", handle_exceptions=1) at /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/build/php-7.0.6/Zend/zend_execute_API.c:1176 #7 0x0000000000a191ad in zend_eval_string_ex (str=0x17d4cd0 "get_defined_constants(true);", retval_ptr=0x0, string_name=0x1353fcc "Command line code", handle_exceptions=1) at /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/build/php-7.0.6/Zend/zend_execute_API.c:1187 #8 0x0000000000b6a05c in do_cli (argc=3, argv=0x17d4c60) at /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/build/php-7.0.6/sapi/cli/php_cli.c:1005 #9 0x0000000000b6b0f5 in main (argc=3, argv=0x17d4c60) at /home/users/lvshun_iwm/php7_odp/trunk/php/.tmp/build/php-7.0.6/sapi/cli/php_cli.c:1344 Previous Comments: ------------------------------------------------------------------------ [2016-05-23 10:23:55] laruence@php.net Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php for *NIX and http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32 Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. I can not reproduce this. ------------------------------------------------------------------------ [2016-05-23 07:39:24] jccgls001 at 126 dot com Description: ------------ hi, I find that when using "get_defined_constants()" function with args "true", zend core will dump. the code like this : var_dump(get_defined_constants(true)); --------------------------------------------------------- About debug detail: I debug the code with gdb and find, this bug maybe caused by "zend_startup_builtin_functions()" in zend_builtin_functions.c(line 362), which the code : zend_builtin_module.module_number = 0; this place assign module index to 0, which will cause "get_defined_constants(true)" dump. Because in this function, the 0 index is reserved to "internal". ---------------------------------------------------------- About fix: I think the code in zend_builtin_functions.c(line 362) can be modified to: zend_builtin_module.module_number = zend_next_free_module(); this will lead index to 1, and can make "get_defined_constants(true)" run correctly. Test script: --------------- get_defined_constants(true); Expected result: ---------------- two dimension array that contains all defined constants group by module's name Actual result: -------------- segmentation fault and core dump ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=72257&edit=1