Edit report at https://bugs.php.net/bug.php?id=62358&edit=1
ID: 62358
Comment by: maciej dot sz at gmail dot com
Reported by: maciej dot sz at gmail dot com
Summary: Segfault when using traits a lot
Status: Feedback
Type: Bug
Package: Reproducible crash
Operating System: Linux 3.2.0-25-generic Ubuntu
PHP Version: 5.4.4
Block user comment: N
Private report: N
New Comment:
This a very serious bug that stops deploying software to production. Can anyone
tell me why the status has been changed to Feedback?
Previous Comments:
------------------------------------------------------------------------
[2012-08-12 12:21:54] maciej dot sz at gmail dot com
Another crash, this time in newest 5.4.6RC1 :
Program received signal SIGSEGV, Segmentation fault.
0x000000000094e409 in zend_get_function_declaration (fptr=0x1b5e240)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_compile.c:3059
3059 size_t name_len = strlen(fptr->common.function_name);
(gdb) bt
#0 0x000000000094e409 in zend_get_function_declaration (fptr=0x1b5e240)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_compile.c:3059
#1 0x000000000094f37b in do_inheritance_check_on_method (child=0x1ba67c0,
parent=0x1b6d2b8)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_compile.c:3263
#2 0x000000000094f531 in do_inherit_method_check
(child_function_table=0x1ba8970, parent=0x1b6d2b8,
hash_key=0x7fffffff9dd0, child_ce=0x1ba8948)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_compile.c:3288
#3 0x0000000000988bf0 in zend_hash_replace_checker_wrapper (target=0x1ba8970,
source_data=0x1b6d2b8,
p=0x1b79630, pParam=0x1ba8948, merge_checker_func=0x94f4aa
<do_inherit_method_check>)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_hash.c:878
#4 0x0000000000988c71 in zend_hash_merge_ex (target=0x1ba8970,
source=0x1b64378,
pCopyConstructor=0x94ddb3 <do_inherit_method>, size=240,
pMergeSource=0x94f4aa <do_inherit_method_check>, pParam=0x1ba8948)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_hash.c:892
#5 0x00000000009507df in zend_do_inheritance (ce=0x1ba8948,
parent_ce=0x1b64350)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_compile.c:3519
#6 0x00000000009540a7 in do_bind_inherited_class (op_array=0x1ba5b10,
opline=0x1bb74b0,
class_table=0x126ee70, parent_ce=0x1b64350, compile_time=0 '\000')
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_compile.c:4570
#7 0x00000000009b742a in ZEND_DECLARE_INHERITED_CLASS_SPEC_HANDLER
(execute_data=0x7ffff7f95e70)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_vm_execute.h:936
#8 0x00000000009b4122 in execute (op_array=0x1ba5b10)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_vm_execute.h:410
#9 0x000000000096381c in zend_call_function (fci=0x7fffffffa410,
fci_cache=0x7fffffffa460)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_execute_API.c:958
#10 0x0000000000717021 in zim_reflection_method_invokeArgs (ht=2,
return_value=0x1ba72f8,
return_value_ptr=0x0, this_ptr=0x1b26ed0, return_value_used=1)
at /home/maciek/Downloads/php-5.4.6RC1/ext/reflection/php_reflection.c:3024
#11 0x00000000009b5838 in zend_do_fcall_common_helper_SPEC
(execute_data=0x7ffff7f94728)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_vm_execute.h:642
#12 0x00000000009b66dc in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7ffff7f94728)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_vm_execute.h:752
#13 0x00000000009b4122 in execute (op_array=0x7ffff095e050)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend_vm_execute.h:410
#14 0x0000000000976ca1 in zend_execute_scripts (type=8, retval=0x0,
file_count=3)
at /home/maciek/Downloads/php-5.4.6RC1/Zend/zend.c:1289
#15 0x00000000008e90aa in php_execute_script (primary_file=0x7fffffffcdd0)
at /home/maciek/Downloads/php-5.4.6RC1/main/main.c:2473
#16 0x0000000000abf8c1 in do_cli (argc=6, argv=0x7fffffffe1b8)
at /home/maciek/Downloads/php-5.4.6RC1/sapi/cli/php_cli.c:988
#17 0x0000000000ac09fa in main (argc=6, argv=0x7fffffffe1b8)
at /home/maciek/Downloads/php-5.4.6RC1/sapi/cli/php_cli.c:1364
------------------------------------------------------------------------
[2012-06-19 09:02:11] maciej dot sz at gmail dot com
Thank you for the response. I've compiled the snapshot (201206190730) and I got
segfault with same BT, only this time it occured earlier in the script.
Maybe it is worth mentioning, that I was not able to reproduce the crash with
small scripts (including only few files). The bug occurs when I use traits with
large frameworks: PHPUnit or Zend Framework.
------------------------------------------------------------------------
[2012-06-18 23:52:10] [email protected]
Please try using this snapshot:
http://snaps.php.net/php5.4-latest.tar.gz
For Windows:
http://windows.php.net/snapshots/
------------------------------------------------------------------------
[2012-06-18 20:23:49] maciej dot sz at gmail dot com
Description:
------------
While using traits PHP crashes a lot. This does not seem to be related to any
certain piece of code, becouse I just have to add a dummy declaration like
$tmp = '';
and the script runs normally.
For example I just wrote code similar to this:
<?php
trait T1
{
public function t1()
{
return 't1';
}
}
class Foo
{
use T1;
}
$f = new Foo();
$f->t1();
?>
and segfault occurred. But all I have to do is add the dummy declaration within
the trait method and the script runs normally:
<?php
trait T1
{
public function t1()
{
$tmp = '';
return 't1';
}
}
class Foo
{
use T1;
}
$f = new Foo();
$f->t1();
?>
Sometimes the segfault error disappears by just running the script again.
All scripts are run from command line, my compile configuration is as follows:
'./configure' '--with-mysql' '--with-pgsql' '--with-zlib' '--enable-calendar'
'--with-curl' '--with-jpeg-dir=/usr' '--with-png-dir=/usr' '--with-gd' '--
enable-bcmath' '--enable-soap' '--enable-fpm' '--with-pdo-mysql' '--with-pdo-
pgsql' '--with-pdo-sqlite' '--with-config-file-path=/etc/php54/cli' '--with-
config-file-scan-dir=/etc/php54/cli/conf.d' '--prefix=/usr/local/php54' '--
enable-debug' '--with-mysqli' '--enable-mbstring'
I've recompile PHP several times. This issue appears to consider all 5.4.*
versions.
Here's a bugtrace:
Program received signal SIGSEGV, Segmentation fault.
0x000000000094dafb in zend_get_function_declaration (fptr=0x1669df0)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_compile.c:3052
3052 memcpy(offset, fptr->common.scope->name, fptr-
>common.scope->name_length);
(gdb) bt
#0 0x000000000094dafb in zend_get_function_declaration (fptr=0x1669df0)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_compile.c:3052
#1 0x000000000094eaf9 in do_inheritance_check_on_method (child=0x16e15d8,
parent=0x1680028)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_compile.c:3263
#2 0x000000000094ecaf in do_inherit_method_check
(child_function_table=0x16e1118, parent=0x1680028,
hash_key=0x7fffffff9db0, child_ce=0x16e10f0)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_compile.c:3288
#3 0x00000000009881ec in zend_hash_replace_checker_wrapper (target=0x16e1118,
source_data=0x1680028,
p=0x167ff80, pParam=0x16e10f0, merge_checker_func=0x94ec28
<do_inherit_method_check>)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_hash.c:878
#4 0x000000000098826d in zend_hash_merge_ex (target=0x16e1118,
source=0x1668390,
pCopyConstructor=0x94d531 <do_inherit_method>, size=240,
pMergeSource=0x94ec28 <do_inherit_method_check>, pParam=0x16e10f0)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_hash.c:892
#5 0x000000000094ff5d in zend_do_inheritance (ce=0x16e10f0,
parent_ce=0x1668368)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_compile.c:3519
#6 0x0000000000953796 in do_bind_inherited_class (op_array=0x16e2270,
opline=0x16eacd8,
class_table=0x126ce70, parent_ce=0x1668368, compile_time=0 '\000')
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_compile.c:4569
#7 0x00000000009b6a49 in ZEND_DECLARE_INHERITED_CLASS_SPEC_HANDLER
(execute_data=0x7ffff7f96538)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_vm_execute.h:936
#8 0x00000000009b3741 in execute (op_array=0x16e2270)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_vm_execute.h:410
#9 0x0000000000962f23 in zend_call_function (fci=0x7fffffffa3f0,
fci_cache=0x7fffffffa440)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_execute_API.c:958
#10 0x0000000000716989 in zim_reflection_method_invokeArgs (ht=2,
return_value=0x16d6960,
---Type <return> to continue, or q <return> to quit---
return_value_ptr=0x0, this_ptr=0x164abb0, return_value_used=1)
at /home/maciek/Pobrane/php-5.4.4/ext/reflection/php_reflection.c:2926
#11 0x00000000009b4e57 in zend_do_fcall_common_helper_SPEC
(execute_data=0x7ffff7f94a38)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_vm_execute.h:642
#12 0x00000000009b5cfb in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x7ffff7f94a38)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_vm_execute.h:752
#13 0x00000000009b3741 in execute (op_array=0x7ffff0d7e680)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend_vm_execute.h:410
#14 0x00000000009762b2 in zend_execute_scripts (type=8, retval=0x0,
file_count=3)
at /home/maciek/Pobrane/php-5.4.4/Zend/zend.c:1279
#15 0x00000000008e8a1a in php_execute_script (primary_file=0x7fffffffcda0)
at /home/maciek/Pobrane/php-5.4.4/main/main.c:2473
#16 0x0000000000abee99 in do_cli (argc=6, argv=0x7fffffffe188)
at /home/maciek/Pobrane/php-5.4.4/sapi/cli/php_cli.c:988
#17 0x0000000000abffb9 in main (argc=6, argv=0x7fffffffe188)
at /home/maciek/Pobrane/php-5.4.4/sapi/cli/php_cli.c:1361
Expected result:
----------------
Script exited normally, without segfault.
Actual result:
--------------
Segmentation fault.
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=62358&edit=1
