View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001313 | Xdebug | Usage problems (Wrong Results) | public | 2016-06-13 20:53 | 2016-12-17 15:35 |
| Reporter | stringerbell | Assigned To | derick | ||
| Priority | normal | Severity | crash | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Platform | 86_64 x86_64 x86_64 GNU/Linux | OS | CentOS | OS Version | 6.7 |
| Product Version | 2.4.0 | ||||
| Target Version | 2.5.1 | Fixed in Version | 2.5.1 | ||
| Summary | 0001313: Segfault on centos when `xdebug.collect_params != 1` | ||||
| Description | I'm getting a segfault when running phpspec. I initially thought this was a PHP or phpspec problem, but after uninstalling, and reinstalling PHP, I noticed my xdebug install settings were missing. After adding them back one by one, I was able to consistently get PHP to segfault when using `xdebug.collect_params = 1`. My full settings are [xdebug] xdebug.remote_enable = 1 xdebug.remote_connect_back = 0 xdebug.remote_handler = dbgp xdebug.remote_port = 9000 xdebug.remote_mode = req xdebug.collect_params = 1 xdebug.remote_host = 192.168.33.1 xdebug.remote_log = /tmp/xdebug.log xdebug.idekey = PHPSTORM xdebug.var_display_max_depth = 10 | ||||
| Steps To Reproduce | 1. PHP 7.0.7 with Xdebug 2.4.0 (minimal repro case) 2. https://github.com/phpspec/phpspec/issues/890#issuecomment-201492582 3. run `phpspec run` | ||||
| Additional Information | Backtrace with gdb (sorry I'm unsure which bits are relevant, but I'm happy to provide more info as needed): #0 0x00007f3c9e8866bf in __strlen_sse42 () from /lib64/libc.so.6 #1 0x0000000000a1e0f7 in format_converter (odp=0x7ffcc428b420, fmt=0x7f3c94f661b4 "s", ap=0x7ffcc428b4b0) at /home/vagrant/src/php-src/main/snprintf.c:993 0000002 0x0000000000a1e9fa in strx_printv (ccp=0x7ffcc428b47c, buf=0x18dd090 "", len=1, format=0x7f3c94f661ad "class %s", ap=0x7ffcc428b4b0) at /home/vagrant/src/php-src/main/snprintf.c:1248 0000003 0x0000000000a1ecda in ap_php_vsnprintf (buf=0x18dd090 "", len=1, format=0x7f3c94f661ad "class %s", ap=0x7ffcc428b4b0) at /home/vagrant/src/php-src/main/snprintf.c:1303 0000004 0x00007f3c94f4d987 in xdebug_sprintf (fmt=0x7f3c94f661ad "class %s") at /home/vagrant/src/xdebug-2.4.0/xdebug_str.c:97 0000005 0x00007f3c94f54ae6 in xdebug_var_synopsis (struc=0x7ffcc428b618, str=0x7ffcc428b620, level=1, debug_zval=0, options=0x18dfae0) at /home/vagrant/src/xdebug-2.4.0/xdebug_var.c:1244 0000006 0x00007f3c94f54c1a in xdebug_get_zval_synopsis (val=0x7f3c9b0182d0, debug_zval=0, options=0x18dfae0) at /home/vagrant/src/xdebug-2.4.0/xdebug_var.c:1285 0000007 0x00007f3c94f485a9 in add_single_value (str=0x7ffcc428b7e0, zv=0x7f3c9b0182d0, html=0, collecton_level=1) at /home/vagrant/src/xdebug-2.4.0/xdebug_stack.c:389 0000008 0x00007f3c94f48bd2 in xdebug_append_printable_stack (str=0x7ffcc428b7e0, html=0) at /home/vagrant/src/xdebug-2.4.0/xdebug_stack.c:483 0000009 0x00007f3c94f28207 in xdebug_throw_exception_hook ( exception=0x7f3c9b018450) at /home/vagrant/src/xdebug-2.4.0/xdebug.c:1507 0000010 0x0000000000b0b38b in zend_throw_exception_internal ( exception=0x7f3c9b018450) at /home/vagrant/src/php-src/Zend/zend_exceptions.c:163 0000011 0x0000000000b0fde7 in zend_throw_exception_object ( exception=0x7f3c9b018450) at /home/vagrant/src/php-src/Zend/zend_exceptions.c:1074 0000012 0x0000000000b68d00 in ZEND_THROW_SPEC_VAR_HANDLER ( execute_data=0x7f3c9b0182e0) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:15176 0000013 0x0000000000b49358 in ZEND_USER_OPCODE_SPEC_HANDLER ( execute_data=0x7f3c9b0182e0) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:1568 0000014 0x0000000000b4490b in execute_ex (ex=0x7f3c9b0182e0) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:417 0000015 0x00007f3c94f29c81 in xdebug_execute_ex (execute_data=0x7f3c9b0182e0) at /home/vagrant/src/xdebug-2.4.0/xdebug.c:1890 0000016 0x0000000000b45e3b in ZEND_DO_FCALL_SPEC_HANDLER ( execute_data=0x7f3c9b018170) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:800 0000017 0x0000000000b49358 in ZEND_USER_OPCODE_SPEC_HANDLER ( execute_data=0x7f3c9b018170) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:1568 0000018 0x0000000000b4490b in execute_ex (ex=0x7f3c9b018170) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:417 0000019 0x00007f3c94f29c81 in xdebug_execute_ex (execute_data=0x7f3c9b018170) at /home/vagrant/src/xdebug-2.4.0/xdebug.c:1890 0000020 0x0000000000b4a05c in ZEND_CALL_TRAMPOLINE_SPEC_HANDLER ( execute_data=0x7f3c9b0180f0) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:1750 0000021 0x0000000000b49358 in ZEND_USER_OPCODE_SPEC_HANDLER ( execute_data=0x7f3c9b018170) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:1568 0000022 0x0000000000b4490b in execute_ex (ex=0x7f3c9b018170) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:417 0000023 0x00007f3c94f29c81 in xdebug_execute_ex (execute_data=0x7f3c9b018170) at /home/vagrant/src/xdebug-2.4.0/xdebug.c:1890 0000024 0x0000000000ac37be in zend_call_function (fci=0x7ffcc428bfb0, fci_cache=0x7ffcc428bf80) at /home/vagrant/src/php-src/Zend/zend_execute_API.c:866 0000025 0x000000000089d5c3 in zif_call_user_func_array ( execute_data=0x7f3c9b0180f0, return_value=0x7f3c9b0180d0) at /home/vagrant/src/php-src/ext/standard/basic_functions.c:4811 0000026 0x0000000000b42d99 in execute_internal (execute_data=0x7f3c9b0180f0, return_value=0x7f3c9b0180d0) at /home/vagrant/src/php-src/Zend/zend_execute.c:2042 0000027 0x00007f3c94f2a6a0 in xdebug_execute_internal ( current_execute_data=0x7f3c9b0180f0, return_value=0x7f3c9b0180d0) at /home/vagrant/src/xdebug-2.4.0/xdebug.c:2037 0000028 0x0000000000b46078 in ZEND_DO_FCALL_SPEC_HANDLER ( execute_data=0x7f3c9b018030) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:844 0000029 0x0000000000b49358 in ZEND_USER_OPCODE_SPEC_HANDLER ( execute_data=0x7f3c9b018030) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:1568 0000030 0x0000000000b4490b in execute_ex (ex=0x7f3c9b018030) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:417 0000031 0x00007f3c94f29c81 in xdebug_execute_ex (execute_data=0x7f3c9b018030) at /home/vagrant/src/xdebug-2.4.0/xdebug.c:1890 0000032 0x0000000000b4a05c in ZEND_CALL_TRAMPOLINE_SPEC_HANDLER ( execute_data=0x7f3c9b017f60) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:1750 0000033 0x0000000000b49358 in ZEND_USER_OPCODE_SPEC_HANDLER ( execute_data=0x7f3c9b018030) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:1568 0000034 0x0000000000b4490b in execute_ex (ex=0x7f3c9b018030) at /home/vagrant/src/php-src/Zend/zend_vm_execute.h:417 #35 0x00007f3c94f29c81 in xdebug_execute_ex (execute_data=0x7f3c9b018030) | ||||
| Tags | No tags attached. | ||||
| Operating System | CentOS 6.7 | ||||
| PHP Version | 7.0.5-7.0.9 | ||||
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I tried reproducing this, but when I put the three files from your https://github.com/phpspec/phpspec/issues/890#issuecomment-201492582 into one directory, and installing phpspec with "composer require phpspec/phpspec", and running it, I only get: derick@whisky:/tmp/1312 $ php vendor/bin/phpspec run -v 0 0 specs 0 examples 0ms |
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Sorry about that! I'll take a look and see if I can get more complete instructions. |
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I created a repo here: https://github.com/stringerbell/xdebug-bug If you clone it, and then run composer install phpspec run You should be able to get the bug to show up. Thanks very much! |
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Hi, I tried this with your reproduce case - instead of "phpspec run" I had to use "bin/phpspec run" to make it work. However, it works fine here, without any crashes, or without any valgrind warnings. And that's with Xdebug 2.4.0 too (2.5.0 is latest). I can't test right now with PHP 7.0.7, but didn't think that using 7.0.12/.13 would make a difference. If you can test that, that'd be good though. However, I am not quite sure what "Skipped installation of bin bin/phpspec for package phpspec/phpspec: name conflicts with an existing file" means: derick@whisky:~ $ pe 7.0dev [PHP: 7.0.13-dev ] derick@whisky:~ $ php -v PHP 7.0.13-dev (cli) (built: Oct 30 2016 14:53:59) ( NTS DEBUG ) Copyright (c) 1997-2016 The PHP Group Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies with Xdebug v2.4.0, Copyright (c) 2002-2016, by Derick Rethans with Zend OPcache v7.0.13-dev, Copyright (c) 1999-2016, by Zend Technologies [PHP: 7.0.13-dev ] derick@whisky:~ $ git clone https://github.com/stringerbell/xdebug-bug Cloning into 'xdebug-bug'... remote: Counting objects: 12, done. remote: Compressing objects: 100% (8/8), done. remote: Total 12 (delta 0), reused 12 (delta 0), pack-reused 0 Unpacking objects: 100% (12/12), done. Checking connectivity... done. [PHP: 7.0.13-dev ] derick@whisky:~ $ cd xdebug-bug/ [GIT: master][PHP: 7.0.13-dev ] derick@whisky:~/xdebug-bug $ php ~/composer.phar install You are running composer with xdebug enabled. This has a major impact on runtime performance. See https://getcomposer.org/xdebug Loading composer repositories with package information Installing dependencies (including require-dev) from lock file - Installing phpdocumentor/reflection-common (1.0) Loading from cache - Installing phpdocumentor/type-resolver (0.2.1) Loading from cache - Installing symfony/yaml (v3.2.0) Loading from cache - Installing symfony/process (v3.2.0) Loading from cache - Installing symfony/finder (v3.2.0) Loading from cache - Installing symfony/event-dispatcher (v3.2.0) Loading from cache - Installing symfony/polyfill-mbstring (v1.3.0) Loading from cache - Installing psr/log (1.0.2) Loading from cache - Installing symfony/debug (v3.2.0) Loading from cache - Installing symfony/console (v3.2.0) Loading from cache - Installing sebastian/recursion-context (2.0.0) Loading from cache - Installing sebastian/exporter (2.0.0) Loading from cache - Installing sebastian/diff (1.4.1) Loading from cache - Installing sebastian/comparator (1.2.2) Loading from cache - Installing webmozart/assert (1.2.0) Loading from cache - Installing phpdocumentor/reflection-docblock (3.1.1) Loading from cache - Installing doctrine/instantiator (1.0.5) Loading from cache - Installing phpspec/prophecy (v1.6.2) Loading from cache - Installing phpspec/php-diff (v1.1.0) Loading from cache - Installing phpspec/phpspec (3.2.2) Loading from cache Skipped installation of bin bin/phpspec for package phpspec/phpspec: name conflicts with an existing file symfony/event-dispatcher suggests installing symfony/dependency-injection () symfony/event-dispatcher suggests installing symfony/http-kernel () symfony/console suggests installing symfony/filesystem () phpspec/phpspec suggests installing phpspec/nyan-formatters (Adds Nyan formatters) Generating autoload files [GIT: master][PHP: 7.0.13-dev ] derick@whisky:~/xdebug-bug $ bin/phpspec run Foo 20 - it will segfault exception [exc:Exception("")] has been thrown. 50% 50% 2 1 specs 2 examples (1 passed, 1 broken) 95ms [GIT: master][PHP: 7.0.13-dev ] derick@whisky:~/xdebug-bug $ export USE_ZEND_ALLOC=0 [GIT: master][PHP: 7.0.13-dev USE_ZEND_ALLOC=0] derick@whisky:~/xdebug-bug $ valgrind php -dxdebug.collect_params=1 -dxdebug.var_display_max_depth=10 bin/phpspec run ==18780== Memcheck, a memory error detector ==18780== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al. ==18780== Using Valgrind-3.12.0.SVN and LibVEX; rerun with -h for copyright info ==18780== Command: php bin/phpspec run ==18780== Foo 20 - it will segfault exception [exc:Exception("")] has been thrown. 50% 50% 2 1 specs 2 examples (1 passed, 1 broken) 2870ms ==18780== ==18780== HEAP SUMMARY: ==18780== in use at exit: 8,365 bytes in 80 blocks ==18780== total heap usage: 244,462 allocs, 244,382 frees, 89,803,923 bytes allocated ==18780== ==18780== LEAK SUMMARY: ==18780== definitely lost: 1,864 bytes in 12 blocks ==18780== indirectly lost: 296 bytes in 2 blocks ==18780== possibly lost: 0 bytes in 0 blocks ==18780== still reachable: 6,205 bytes in 66 blocks ==18780== suppressed: 0 bytes in 0 blocks ==18780== Rerun with --leak-check=full to see details of leaked memory ==18780== ==18780== For counts of detected and suppressed errors, rerun with: -v ==18780== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0) So I'm not sure what to do now... |
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Sorry for the delay. Hmm, not sure what's different. Out of curiosity, I updated my php version to the latest yum package, to 7.0.14. Hopefully that makes it easier to reproduce. Here's my terminal: [vagrant@i3ballot ~]$ php -v PHP 7.0.14 (cli) (built: Dec 10 2016 11:58:43) ( NTS ) Copyright (c) 1997-2016 The PHP Group Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies with Xdebug v2.4.0, Copyright (c) 2002-2016, by Derick Rethans [vagrant@i3ballot ~]$ git clone https://github.com/stringerbell/xdebug-bug Initialized empty Git repository in /home/vagrant/xdebug-bug/.git/ remote: Counting objects: 12, done. remote: Compressing objects: 100% (8/8), done. remote: Total 12 (delta 0), reused 12 (delta 0), pack-reused 0 Unpacking objects: 100% (12/12), done. [vagrant@i3ballot ~]$ cd xdebug-bug/ [vagrant@i3ballot xdebug-bug]$ composer install You are running composer with xdebug enabled. This has a major impact on runtime performance. See https://getcomposer.org/xdebug Loading composer repositories with package information Installing dependencies (including require-dev) from lock file - Installing phpdocumentor/reflection-common (1.0) Loading from cache - Installing phpdocumentor/type-resolver (0.2.1) Loading from cache - Installing symfony/yaml (v3.2.0) Loading from cache - Installing symfony/process (v3.2.0) Loading from cache - Installing symfony/finder (v3.2.0) Loading from cache - Installing symfony/event-dispatcher (v3.2.0) Loading from cache - Installing symfony/polyfill-mbstring (v1.3.0) Loading from cache - Installing psr/log (1.0.2) Loading from cache - Installing symfony/debug (v3.2.0) Loading from cache - Installing symfony/console (v3.2.0) Loading from cache - Installing sebastian/recursion-context (2.0.0) Loading from cache - Installing sebastian/exporter (2.0.0) Loading from cache - Installing sebastian/diff (1.4.1) Loading from cache - Installing sebastian/comparator (1.2.2) Loading from cache - Installing webmozart/assert (1.2.0) Loading from cache - Installing phpdocumentor/reflection-docblock (3.1.1) Loading from cache - Installing doctrine/instantiator (1.0.5) Loading from cache - Installing phpspec/prophecy (v1.6.2) Loading from cache - Installing phpspec/php-diff (v1.1.0) Loading from cache - Installing phpspec/phpspec (3.2.2) Loading from cache Skipped installation of bin bin/phpspec for package phpspec/phpspec: name conflicts with an existing file symfony/event-dispatcher suggests installing symfony/dependency-injection () symfony/event-dispatcher suggests installing symfony/http-kernel () symfony/console suggests installing symfony/filesystem () phpspec/phpspec suggests installing phpspec/nyan-formatters (Adds Nyan formatters) Generating autoload files [vagrant@i3ballot xdebug-bug]$ bin/phpspec run 1Segmentation fault I'm unable to reproduce it if my /etc/php.d/xdebug.ini file doesn't have xdebug.collect_params = 1. (I get the same results as above when that setting isn't present) Is there anything I can do to make your job easier, or info I can give you that would help? |
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I ran it with a debug build. I can try that. |
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I can reproduce this now, with a no-debug build and Xdebug 2.4.0 *and* 2.5.0. |
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fantastic! Let me know if you need anything from me. Thank you. |
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I think I've fixed this in Git (the master and xdebug_2_5 branches) |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2016-06-13 20:53 | stringerbell | New Issue | |
| 2016-07-31 12:36 | derick | Category | Usage problems => Usage problems (Crashes) |
| 2016-07-31 12:38 | derick | Category | Usage problems (Crashes) => Usage problems (Wrong Results) |
| 2016-12-04 16:04 | derick | Note Added: 0003912 | |
| 2016-12-04 16:04 | derick | Assigned To | => derick |
| 2016-12-04 16:04 | derick | Status | new => feedback |
| 2016-12-07 15:24 | stringerbell | Note Added: 0003962 | |
| 2016-12-07 15:24 | stringerbell | Status | feedback => assigned |
| 2016-12-07 15:57 | stringerbell | Note Added: 0003963 | |
| 2016-12-08 21:25 | derick | Note Added: 0003964 | |
| 2016-12-08 21:25 | derick | Status | assigned => feedback |
| 2016-12-14 16:01 | stringerbell | Note Added: 0004069 | |
| 2016-12-14 16:01 | stringerbell | Status | feedback => assigned |
| 2016-12-14 16:15 | derick | Note Added: 0004070 | |
| 2016-12-14 16:22 | derick | Note Added: 0004071 | |
| 2016-12-14 16:24 | stringerbell | Note Added: 0004072 | |
| 2016-12-15 12:03 | derick | Target Version | => 2.5.1 |
| 2016-12-17 15:35 | derick | Note Added: 0004078 | |
| 2016-12-17 15:35 | derick | Status | assigned => closed |
| 2016-12-17 15:35 | derick | Resolution | open => fixed |
| 2016-12-17 15:35 | derick | Fixed in Version | => 2.5.1 |
