| Description | We have some endpoints in our Symfony Application, which produces a crash in XDebug.
It only occurs, if the IDE is listening to incoming connections, and a breakpoint is enabled.
It can occur, even if the breakpoint is not anywhere near the code being tested.
I did a core dump, and looked through the backtrace.
It looks like the zend_string_equals get a bogus argument, which was returned by zend_get_executed_filename_ex in debugger/debugger.c:554
I have not been able to dig through php-src/Zend/zend_execute_API.c to figure out, why zend_get_executed_filename_ex returns 0x2.
I have working endpoints, where I can reproduce the error, but since the code is proprietary, I cannot share it.
I did not manage to isolate the issue, as changing the code seem to make the problem go away. |
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| Additional Information | Program terminated with signal SIGSEGV, Segmentation fault.
#0 zend_string_equal_content (s2=0x2, s1=0x7f86a9e76070) at /usr/include/php/Zend/zend_string.h:357
357 /usr/include/php/Zend/zend_string.h: No such file or directory.
(gdb) bt
#0 zend_string_equal_content (s2=0x2, s1=0x7f86a9e76070) at /usr/include/php/Zend/zend_string.h:357
#1 zend_string_equals (s2=0x2, s1=0x7f86a9e76070) at /usr/include/php/Zend/zend_string.h:362
0000002 mark_fse_as_having_line_breakpoints (fse=0x55d84894efa0) at /usr/src/debug/php-pecl-xdebug3-3.3.1-1.el8.remi.8.1.x86_64/src/src/debugger/debugger.c:573
0000003 handle_breakpoints (return_value=0x7f86a9e131b0, breakpoint_type=8, fse=0x55d84894efa0) at /usr/src/debug/php-pecl-xdebug3-3.3.1-1.el8.remi.8.1.x86_64/src/src/debugger/debugger.c:591
0000004 xdebug_debugger_handle_breakpoints (fse=fse@entry=0x55d84894efa0, breakpoint_type=breakpoint_type@entry=8, return_value=return_value@entry=0x7f86a9e131b0) at /usr/src/debug/php-pecl-xdebug3-3.3.1-1.el8.remi.8.1.x86_64/src/src/debugger/debugger.c:623
0000005 0x00007f869c900610 in xdebug_execute_internal_end (current_execute_data=0x7f86a9e131d0, return_value=0x7f86a9e131b0) at /usr/src/debug/php-pecl-xdebug3-3.3.1-1.el8.remi.8.1.x86_64/src/src/base/base.c:998
0000006 xdebug_execute_internal (current_execute_data=0x7f86a9e131d0, return_value=0x7f86a9e131b0) at /usr/src/debug/php-pecl-xdebug3-3.3.1-1.el8.remi.8.1.x86_64/src/src/base/base.c:1022
0000007 0x000055d845fa3c50 in ZEND_DO_FCALL_SPEC_OBSERVER_HANDLER () at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:1981
0000008 0x000055d8461d2a6f in execute_ex (ex=0x7f86a9e76070) at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:55852
0000009 0x000055d845fa3bbb in ZEND_DO_FCALL_SPEC_OBSERVER_HANDLER () at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:1946
0000010 0x000055d8461d2a6f in execute_ex (ex=0x7f86a9e76070) at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:55852
0000011 0x000055d845fa3bbb in ZEND_DO_FCALL_SPEC_OBSERVER_HANDLER () at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:1946
0000012 0x000055d8461d2a6f in execute_ex (ex=0x7f86a9e76070) at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:55852
0000013 0x000055d845fa3bbb in ZEND_DO_FCALL_SPEC_OBSERVER_HANDLER () at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:1946
0000014 0x000055d8461d2a6f in execute_ex (ex=0x7f86a9e76070) at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:55852
0000015 0x000055d845fa3bbb in ZEND_DO_FCALL_SPEC_OBSERVER_HANDLER () at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:1946
0000016 0x000055d8461d2a6f in execute_ex (ex=0x7f86a9e76070) at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:55852
0000017 0x000055d845fa3bbb in ZEND_DO_FCALL_SPEC_OBSERVER_HANDLER () at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:1946
0000018 0x000055d8461d2a6f in execute_ex (ex=0x7f86a9e76070) at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:55852
0000019 0x000055d8461d2ccc in zend_execute (op_array=0x7f86a9e74000, return_value=0x0) at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend_vm_execute.h:60188
0000020 0x000055d846162235 in zend_execute_scripts (type=type@entry=8, retval=retval@entry=0x0, file_count=file_count@entry=3) at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/Zend/zend.c:1857
0000021 0x000055d8460fd2aa in php_execute_script (primary_file=<optimized out>) at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/main/main.c:2551
0000022 0x000055d845faf231 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/php-8.1.27-1.el8.remi.x86_64/sapi/fpm/fpm/fpm_main.c:1935
(gdb) frame 2
0000002 mark_fse_as_having_line_breakpoints (fse=0x55d84894efa0) at /usr/src/debug/php-pecl-xdebug3-3.3.1-1.el8.remi.8.1.x86_64/src/src/debugger/debugger.c:573
573 } else if (!zend_string_equals(extra_brk_info->filename, executed_filename)) {
(gdb) info locals
extra_brk_info = 0x55d8485e8b10
executed_filename = 0x2
le = 0x55d848782f40
le = <optimized out>
extra_brk_info = <optimized out>
executed_filename = <optimized out>
resolved_filename = <optimized out>
(gdb) ptype executed_filename
type = struct _zend_string {
zend_refcounted_h gc;
zend_ulong h;
size_t len;
char val[1];
} *
(gdb) print executed_filename
$1 = (zend_string *) 0x2
[root@opsdev4.zitcom.dk ~]# dnf list installed | grep xdebug
php-pecl-xdebug3.x86_64 3.3.1-1.el8.remi.8.1 @remi-modular
php-pecl-xdebug3-debuginfo.x86_64 3.3.1-1.el8.remi.8.1 @remi-modular-debuginfo
php-pecl-xdebug3-debugsource.x86_64 3.3.1-1.el8.remi.8.1 @remi-modular-debuginfo
[root@opsdev4.zitcom.dk ~]# dnf list installed | grep php-fpm
php-fpm.x86_64 8.1.27-1.el8.remi @remi-modular
php-fpm-debuginfo.x86_64 8.1.27-1.el8.remi @System
[root@opsdev4.zitcom.dk ~]# dnf list installed | grep php-common
php-common.x86_64 8.1.27-1.el8.remi @remi-modular
php-common-debuginfo.x86_64 8.1.27-1.el8.remi @remi-modular-debuginfo
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