Edit report at https://bugs.php.net/bug.php?id=65784&edit=1
ID: 65784
Updated by: fel...@php.net
Reported by: r dot wilczek at web-appz dot de
Summary: Segfault with finally
-Status: Open
+Status: Feedback
Type: Bug
Package: *General Issues
Operating System: Linux
PHP Version: 5.5.4
Block user comment: N
Private report: N
Previous Comments:
------------------------------------------------------------------------
[2013-10-01 22:58:15] ni...@php.net
Could you please post the code as it is actually used (just the part containing
the finally)? Your backtrace indicates that the segfault happens during an
argument send, but your code samples do not include any function calls with
arguments.
------------------------------------------------------------------------
[2013-09-29 12:26:34] r dot wilczek at web-appz dot de
(The second core-dump is created without xdebug, to keep things simple)
------------------------------------------------------------------------
[2013-09-29 12:25:34] r dot wilczek at web-appz dot de
#0 0x0000000000a41895 in zval_delref_p (pz=0x0) at
/root/php-5.5.4/php-5.5.4/Zend/zend.h:409
#1 0x0000000000a4330c in zend_pzval_unlock_func (z=0x0,
should_free=0x7fffa8aa9e90, unref=1) at
/root/php-5.5.4/php-5.5.4/Zend/zend_execute.c:72
#2 0x0000000000a4341b in _get_zval_ptr_var (var=4294967232,
execute_data=0x7f1fceaa5098, should_free=0x7fffa8aa9e90) at
/root/php-5.5.4/php-5.5.4/Zend/zend_execute.c:186
#3 0x0000000000a63e15 in ZEND_SEND_VAR_NO_REF_SPEC_VAR_HANDLER
(execute_data=0x7f1fceaa5098) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:13081
#4 0x0000000000a480cf in execute_ex (execute_data=0x7f1fceaa5098) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#5 0x0000000000a48157 in zend_execute (op_array=0x2e129f0) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#6 0x00000000009f6785 in zend_call_function (fci=0x7fffa8aaa100,
fci_cache=0x7fffa8aaa0d0) at
/root/php-5.5.4/php-5.5.4/Zend/zend_execute_API.c:939
#7 0x000000000076285c in zim_reflection_method_invokeArgs (ht=2,
return_value=0x2e3b2d0, return_value_ptr=0x0, this_ptr=0x2e3b450,
return_value_used=1)
at /root/php-5.5.4/php-5.5.4/ext/reflection/php_reflection.c:3018
#8 0x0000000000a489de in zend_do_fcall_common_helper_SPEC
(execute_data=0x7f1fceaa49e8) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:550
#9 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7f1fceaa49e8) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#10 0x0000000000a480cf in execute_ex (execute_data=0x7f1fceaa49e8) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#11 0x0000000000a48157 in zend_execute (op_array=0x7f1fcead9b60) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#12 0x0000000000a0a27f in zend_execute_scripts (type=8, retval=0x0,
file_count=3) at /root/php-5.5.4/php-5.5.4/Zend/zend.c:1318
#13 0x0000000000976e9e in php_execute_script (primary_file=0x7fffa8aad7a0) at
/root/php-5.5.4/php-5.5.4/main/main.c:2489
#14 0x0000000000ab7ac7 in do_cli (argc=5, argv=0x263beb0) at
/root/php-5.5.4/php-5.5.4/sapi/cli/php_cli.c:994
#15 0x0000000000ab8bff in main (argc=5, argv=0x263beb0) at
/root/php-5.5.4/php-5.5.4/sapi/cli/php_cli.c:1378
------------------------------------------------------------------------
[2013-09-29 12:18:45] r dot wilczek at web-appz dot de
Description:
------------
The structures
try {
return foo();
} finally {
bar();
}
or
try {
return foo();
} catch (Exception $e) {
throw $e;
} finally {
bar();
}
under some circumstances segfault, whereas the equivalent structure
try {
$result = foo();
bar();
return $result;
} catch (Exception $e) {
bar();
throw $e;
}
works as expected.
Test script:
---------------
It's hard to reproduce the failure, because it occured within a "PHPUnit Mock
Monster", and I failed to reproduce it with a simple script.
All I can show is the core-dump below, which is produced by a
try {
return foo();
} finally {
bar();
}
Expected result:
----------------
No Segmentation fault
Actual result:
--------------
Segmentation fault
#0 0x0000000000a41895 in zval_delref_p (pz=0x0) at
/root/php-5.5.4/php-5.5.4/Zend/zend.h:409
#1 0x0000000000a4330c in zend_pzval_unlock_func (z=0x0,
should_free=0x7fff17175fe0, unref=1)
at /root/php-5.5.4/php-5.5.4/Zend/zend_execute.c:72
#2 0x0000000000a4341b in _get_zval_ptr_var (var=4294967232,
execute_data=0x7fea01fe0098, should_free=0x7fff17175fe0)
at /root/php-5.5.4/php-5.5.4/Zend/zend_execute.c:186
#3 0x0000000000a63e15 in ZEND_SEND_VAR_NO_REF_SPEC_VAR_HANDLER
(execute_data=0x7fea01fe0098)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:13081
#4 0x0000000000a4a772 in ZEND_USER_OPCODE_SPEC_HANDLER
(execute_data=0x7fea01fe0098)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:1119
#5 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fe0098) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#6 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fe0098) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#7 0x0000000000a48157 in zend_execute (op_array=0x1e07960) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#8 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fdff10)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#9 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fdff10)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#10 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fdff10) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#11 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fdff10) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#12 0x0000000000a48157 in zend_execute (op_array=0x1e2e1e0) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#13 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fdfc38)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#14 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fdfc38)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#15 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fdfc38) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#16 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fdfc38) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#17 0x0000000000a48157 in zend_execute (op_array=0x7fe9fb75d630) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#18 0x00000000009f6785 in zend_call_function (fci=0x7fff171766d0,
fci_cache=0x7fff171766a0)
at /root/php-5.5.4/php-5.5.4/Zend/zend_execute_API.c:939
#19 0x000000000076285c in zim_reflection_method_invokeArgs (ht=2,
return_value=0x7fe9fb705d90, return_value_ptr=0x0,
this_ptr=0x7fe9fb7048b0, return_value_used=1) at
/root/php-5.5.4/php-5.5.4/ext/reflection/php_reflection.c:3018
#20 0x0000000000a47936 in execute_internal (execute_data_ptr=0x7fea01fdf9e8,
fci=0x0, return_value_used=1)
at /root/php-5.5.4/php-5.5.4/Zend/zend_execute.c:1485
#21 0x00007fe9fbfd3118 in xdebug_execute_internal
(current_execute_data=0x7fea01fdf9e8, fci=0x0, return_value_used=1)
at /tmp/pear/temp/xdebug/xdebug.c:1553
#22 0x0000000000a48a0e in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fdf9e8)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:552
#23 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fdf9e8)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
---Type <return> to continue, or q <return> to quit---
#24 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fdf9e8) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#25 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fdf9e8) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#26 0x0000000000a48157 in zend_execute (op_array=0x7fe9fb6ded80) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#27 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fdef70)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#28 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fdef70)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#29 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fdef70) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#30 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fdef70) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#31 0x0000000000a48157 in zend_execute (op_array=0x7fe9fb6deb90) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#32 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fddc88)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#33 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fddc88)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#34 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fddc88) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#35 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fddc88) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#36 0x0000000000a48157 in zend_execute (op_array=0x7fe9fb69c850) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#37 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fdc7d8)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#38 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fdc7d8)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#39 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fdc7d8) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#40 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fdc7d8) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#41 0x0000000000a48157 in zend_execute (op_array=0x7fe9fb6e6808) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#42 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fdb768)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#43 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fdb768)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#44 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fdb768) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#45 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fdb768) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#46 0x0000000000a48157 in zend_execute (op_array=0x7fe9fb6a9f30) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#47 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fdb540)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#48 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fdb540)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#49 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fdb540) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#50 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fdb540) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#51 0x0000000000a48157 in zend_execute (op_array=0x7fe9fb6a5538) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
---Type <return> to continue, or q <return> to quit---
#52 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fda210)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#53 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fda210)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#54 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fda210) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#55 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fda210) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#56 0x0000000000a48157 in zend_execute (op_array=0x7fe9fb880078) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#57 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fd7d88)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#58 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fd7d88)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#59 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fd7d88) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#60 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fd7d88) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#61 0x0000000000a48157 in zend_execute (op_array=0x7fea01e62598) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#62 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fd7470)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#63 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fd7470)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#64 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fd7470) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#65 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fd7470) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#66 0x0000000000a48157 in zend_execute (op_array=0x7fea01e57b10) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#67 0x0000000000a48bfc in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fea01fd72c8)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:584
#68 0x0000000000a491b0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7fea01fd72c8)
at /root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:685
#69 0x0000000000a480cf in execute_ex (execute_data=0x7fea01fd72c8) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:363
#70 0x00007fe9fbfd2c57 in xdebug_execute_ex (execute_data=0x7fea01fd72c8) at
/tmp/pear/temp/xdebug/xdebug.c:1437
#71 0x0000000000a48157 in zend_execute (op_array=0x7fea01e56eb8) at
/root/php-5.5.4/php-5.5.4/Zend/zend_vm_execute.h:388
#72 0x0000000000a0a27f in zend_execute_scripts (type=8, retval=0x0,
file_count=3) at /root/php-5.5.4/php-5.5.4/Zend/zend.c:1318
#73 0x0000000000976e9e in php_execute_script (primary_file=0x7fff1717aeb0) at
/root/php-5.5.4/php-5.5.4/main/main.c:2489
#74 0x0000000000ab7ac7 in do_cli (argc=5, argv=0x1932ee0) at
/root/php-5.5.4/php-5.5.4/sapi/cli/php_cli.c:994
#75 0x0000000000ab8bff in main (argc=5, argv=0x1932ee0) at
/root/php-5.5.4/php-5.5.4/sapi/cli/php_cli.c:1378
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=65784&edit=1
