View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0002322 | Xdebug | Step Debugging | public | 2025-02-24 11:38 | 2025-04-04 13:36 |
| Reporter | martti | Assigned To | derick | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Product Version | 3.4.1 | ||||
| Target Version | 3.4dev | Fixed in Version | 3.4dev | ||
| Summary | 0002322: Xdebug tries to open debugging connection in destructors during shutdown | ||||
| Description | Xdebug tries to open debugging connection continuously to client while php is shutting down This seems to be happening if there is lots of objects with __destruct -method defined. | ||||
| Steps To Reproduce | Run destruct.php while client is not listening for connections | ||||
| Tags | No tags attached. | ||||
| Attached Files | backtrace.txt (3,180 bytes)
(gdb) zbacktrace
[0xfffff4016020] Testing->__destruct() /app/destruct.php:7
(gdb) backtrace
#0 0x0000fffff737d9f4 in poll () from /lib/aarch64-linux-gnu/libc.so.6
#1 0x0000fffff73ad2e4 in ?? () from /lib/aarch64-linux-gnu/libc.so.6
#2 0x0000fffff73adda4 in __res_context_send () from /lib/aarch64-linux-gnu/libc.so.6
#3 0x0000fffff73ab6d0 in __res_context_query () from /lib/aarch64-linux-gnu/libc.so.6
#4 0x0000fffff73ac1e8 in __res_context_search () from /lib/aarch64-linux-gnu/libc.so.6
#5 0x0000fffff73a5be0 in _nss_dns_gethostbyname4_r () from /lib/aarch64-linux-gnu/libc.so.6
#6 0x0000fffff7373738 in getaddrinfo () from /lib/aarch64-linux-gnu/libc.so.6
#7 0x0000fffff3c5d990 in xdebug_create_socket (hostname=0xaaaaabf59ce8 "host.docker.internal", dport=9003, timeout=50)
at /tmp/pear/temp/xdebug/src/debugger/com.c:237
#8 0x0000fffff3c5e120 in xdebug_init_normal_debugger (connection_attempts=0xaaaaac1db7a0) at /tmp/pear/temp/xdebug/src/debugger/com.c:475
#9 0x0000fffff3c5e6e4 in xdebug_init_debugger () at /tmp/pear/temp/xdebug/src/debugger/com.c:595
#10 0x0000fffff3c5f064 in xdebug_debug_init_if_requested_at_startup () at /tmp/pear/temp/xdebug/src/debugger/com.c:820
#11 0x0000fffff3c39a20 in xdebug_execute_user_code_begin (execute_data=0xfffff4016020) at /tmp/pear/temp/xdebug/src/base/base.c:739
#12 0x0000fffff3c3a570 in xdebug_execute_begin (execute_data=0xfffff4016020) at /tmp/pear/temp/xdebug/src/base/base.c:1039
#13 0x0000aaaaab32bc34 in _zend_observe_fcall_begin (execute_data=0xfffff4016020) at /usr/src/php/Zend/zend_observer.c:244
#14 0x0000aaaaab32bce8 in zend_observer_fcall_begin (execute_data=0xfffff4016020) at /usr/src/php/Zend/zend_observer.c:257
#15 0x0000aaaaab1e05d8 in zend_call_function (fci=0xffffffffd2e8, fci_cache=0xffffffffd2c0) at /usr/src/php/Zend/zend_execute_API.c:960
#16 0x0000aaaaab1e0b10 in zend_call_known_function (fn=0xfffff40a1218, object=0xfffff40bd1e0, called_scope=0xfffff40a1018, retval_ptr=0x0,
param_count=0, params=0x0, named_params=0x0) at /usr/src/php/Zend/zend_execute_API.c:1055
#17 0x0000aaaaab313dbc in zend_call_known_instance_method (fn=0xfffff40a1218, object=0xfffff40bd1e0, retval_ptr=0x0, param_count=0,
params=0x0) at /usr/src/php/Zend/zend_API.h:853
#18 0x0000aaaaab313df4 in zend_call_known_instance_method_with_0_params (fn=0xfffff40a1218, object=0xfffff40bd1e0, retval_ptr=0x0)
at /usr/src/php/Zend/zend_API.h:859
#19 0x0000aaaaab3144a4 in zend_objects_destroy_object (object=0xfffff40bd1e0) at /usr/src/php/Zend/zend_objects.c:173
#20 0x0000aaaaab31c560 in zend_objects_store_call_destructors (objects=0xaaaaabf23d20 <executor_globals+840>)
at /usr/src/php/Zend/zend_objects_API.c:59
#21 0x0000aaaaab1ddbe8 in shutdown_destructors () at /usr/src/php/Zend/zend_execute_API.c:262
#22 0x0000aaaaab1fb8ec in zend_call_destructors () at /usr/src/php/Zend/zend.c:1281
#23 0x0000aaaaab136498 in php_request_shutdown (dummy=0x0) at /usr/src/php/main/main.c:1872
#24 0x0000aaaaab3a90dc in do_cli (argc=2, argv=0xaaaaabf40ae0) at /usr/src/php/sapi/cli/php_cli.c:1137
#25 0x0000aaaaab3a95ec in main (argc=2, argv=0xaaaaabf40ae0) at /usr/src/php/sapi/cli/php_cli.c:1341
(gdb)
destruct.php (139 bytes)
<?php
class Testing
{
function __destruct() {
echo "Destruct";
}
}
$t = array();
for ($i=0; $i<1000; $i++) {
$t[] = new Testing();
}
| ||||
| Operating System | |||||
| PHP Version | 8.3.10-8.3.19 | ||||
|
|
During analysis, I found that this only happens when the destructors are called when the object goes out of the global scope only. For example, this version does not show the same behaviour: |
|
|
|
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2025-02-24 11:38 | martti | New Issue | |
| 2025-02-24 11:38 | martti | File Added: backtrace.txt | |
| 2025-02-24 11:38 | martti | File Added: destruct.php | |
| 2025-02-24 11:38 | martti | File Added: xdebug.log | |
| 2025-04-04 10:59 | derick | Note Added: 0007226 | |
| 2025-04-04 11:12 | derick | Status | new => assigned |
| 2025-04-04 11:12 | derick | Target Version | => 3.4dev |
| 2025-04-04 11:12 | derick | Summary | Xdebug tries to open debugging connection continuously to client while php is shutting down => Xdebug tries to open debugging connection in destructors during shutdown |
| 2025-04-04 11:12 | derick | Note Added: 0007227 | |
| 2025-04-04 13:36 | derick | Assigned To | => derick |
| 2025-04-04 13:36 | derick | Status | assigned => closed |
| 2025-04-04 13:36 | derick | Resolution | open => fixed |
| 2025-04-04 13:36 | derick | Fixed in Version | => 3.4dev |
