Edit report at https://bugs.php.net/bug.php?id=60104&edit=1
ID: 60104
Updated by: dmi...@php.net
Reported by: patrickalla...@php.net
Summary: Segmentation Fault in pdo_sqlite when using
sqliteCreateFunction()
Status: Assigned
Type: Bug
Package: Reproducible crash
Operating System: Gentoo Linux
PHP Version: trunk-SVN-2011-10-20 (SVN)
Assigned To: dmitry
Block user comment: N
Private report: N
New Comment:
I would say that the problem in "magic" PDO extension design. It creates and
destroys method tables at runtime. See pdo_hash_methods() at pdo_dbh.c. As
result ZE can't cache bindings of for such methods.
The problem may be solved in few ways.
1) Fix PDO
2) Introduce additional fn_flag that disables method caching
3) Disable method caching for classes with custom get_method handler
I think (2) is the simplest solution that won't make performance degradation.
PDO fix would make it faster and reduce memory usage, but it's much more
serious task. I just don't have time to do it myself.
Previous Comments:
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[2011-11-04 19:51:45] tony2...@php.net
Dmitry, could you take a look at it?
Looks like something is wrong with that caching thingie in the executor..
(gdb) f 0
#0 ZEND_INIT_METHOD_CALL_SPEC_CV_CONST_HANDLER (execute_data=0x7ffff7f9d1c0)
at /local/qa/5_4_valgrind/Zend/zend_vm_execute.h:28949
28949 if ((EX(fbc)->common.fn_flags & ZEND_ACC_STATIC) != 0) {
(gdb) p *execute_data.fbc
$10 = {type = 90 'Z', common = {type = 90 'Z', function_name =
0x5a5a5a5a5a5a5a5a <Address 0x5a5a5a5a5a5a5a5a out of bounds>, scope =
0x5a5a5a5a5a5a5a5a,
fn_flags = 1515870810, prototype = 0x5a5a5a5a5a5a5a5a, num_args =
1515870810, required_num_args = 1515870810, arg_info = 0x5a5a5a5a5a5a5a5a},
op_array = {type = 90 'Z', function_name = 0x5a5a5a5a5a5a5a5a <Address
0x5a5a5a5a5a5a5a5a out of bounds>, scope = 0x5a5a5a5a5a5a5a5a,
fn_flags = 1515870810, prototype = 0x5a5a5a5a5a5a5a5a, num_args =
1515870810, required_num_args = 1515870810, arg_info = 0x5a5a5a5a5a5a5a5a,
refcount = 0x5a5a5a5a5a5a5a5a, opcodes = 0x5a5a5a5a5a5a5a5a, last =
1515870810, vars = 0x5a5a5a5a5a5a5a5a, last_var = 1515870810, T = 1515870810,
brk_cont_array = 0x5a5a5a5a5a5a5a5a, last_brk_cont = 1515870810,
try_catch_array = 0x5a5a5a5a5a5a5a5a, last_try_catch = 1515870810,
static_variables = 0x5a5a5a5a5a5a5a5a, this_var = 1515870810, filename =
0x5a5a5a5a5a5a5a5a <Address 0x5a5a5a5a5a5a5a5a out of bounds>,
line_start = 1515870810, line_end = 1515870810, doc_comment =
0x5a5a5a5a5a5a5a5a <Address 0x5a5a5a5a5a5a5a5a out of bounds>,
doc_comment_len = 1515870810, early_binding = 1515870810, literals =
0x5a5a5a5a5a5a5a5a, last_literal = 1515870810,
run_time_cache = 0x5a5a5a5a5a5a5a5a, last_cache_slot = 1515870810, reserved
= {0x5a5a5a5a5a5a5a5a, 0x5a5a5a5a5a5a5a5a, 0x5a5a5a5a5a5a5a5a,
0x5a5a5a5a5a5a5a5a}}, internal_function = {type = 90 'Z', function_name =
0x5a5a5a5a5a5a5a5a <Address 0x5a5a5a5a5a5a5a5a out of bounds>,
scope = 0x5a5a5a5a5a5a5a5a, fn_flags = 1515870810, prototype =
0x5a5a5a5a5a5a5a5a, num_args = 1515870810, required_num_args = 1515870810,
arg_info = 0x5a5a5a5a5a5a5a5a, handler = 0x5a5a5a5a5a5a5a5a, module =
0x5a5a5a5a5a5a5a5a}}
------------------------------------------------------------------------
[2011-11-04 19:13:31] patrickalla...@php.net
Automatic comment from SVN on behalf of patrickallaert
Revision: http://svn.php.net/viewvc/?view=revision&revision=318784
Log: Added test for #60104
------------------------------------------------------------------------
[2011-10-26 09:34:35] patrickalla...@php.net
I have been able to reproduce it without PHPUnit.
I committed ext/pdo_sqlite/tests/bug60104.phpt to make it easier.
------------------------------------------------------------------------
[2011-10-26 09:32:34] patrickalla...@php.net
Automatic comment from SVN on behalf of patrickallaert
Revision: http://svn.php.net/viewvc/?view=revision&revision=318424
Log: Added test for #60104
------------------------------------------------------------------------
[2011-10-21 10:15:16] patrickalla...@php.net
The segfault appears the second time it executes $this->handler-
>sqliteCreateFunction() in the setUp().
If unset() isn't used in tearDown(), then there is no crash.
------------------------------------------------------------------------
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