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[2005-11-19 15:40 UTC] joh at deworks dot net
Description:
------------
PDO segfaults on any pdo_stmt_instantiate when using persistent connections.
Reproduce code:
---------------
<?php
$dsn = '...';
$user = '...';
$pass = '...';
$options = array(PDO::ATTR_PERSISTENT => true);
$db = new PDO($dsn, $user, $pass, $options);
$sql = 'SELECT * FROM some_table';
$result = $db->query($sql);
echo "Query OK";
?>
Expected result:
----------------
Query OK
Actual result:
--------------
Segmentation fault
GDB backtrace:
#0 _object_and_properties_init (arg=0x8599b0c, class_type=0x0, properties=0x0,
tsrm_ls=0x8439018) at /shared/src/php/php5-200511191330/Zend/zend_API.c:818
#1 0x0829ba79 in _object_init_ex (arg=0x8599b0c, class_type=0x0,
tsrm_ls=0x8439018) at /shared/src/php/php5-200511191330/Zend/zend_API.c:843
#2 0x081316c0 in pdo_stmt_instantiate (dbh=0x8599c08, object=0x8599b0c, dbstmt_ce=Variable "dbstmt_ce" is not available.
) at /shared/src/php/php5-200511191330/ext/pdo/pdo_dbh.c:418
#3 0x08133d11 in zif_PDO_query (ht=1, return_value=0x8599b0c,
return_value_ptr=0x0, this_ptr=0x8599a84, return_value_used=1,
tsrm_ls=0x8439018) at /shared/src/php/php5-200511191330/ext/pdo/pdo_dbh.c:971
#4 0x082be00e in zend_do_fcall_common_helper_SPEC (execute_data=0xbfdfd24c,
tsrm_ls=0x8439018) at zend_vm_execute.h:188
#5 0x082bd5fa in execute (op_array=0x8595184, tsrm_ls=0x8439018)
at zend_vm_execute.h:88
#6 0x0829893e in zend_execute_scripts (type=8, tsrm_ls=0x8439018, retval=Variable "retval" is not available.
)
at /shared/src/php/php5-200511191330/Zend/zend.c:1090
#7 0x0825af0a in php_execute_script (primary_file=0xbfdff64c, tsrm_ls=0x8439018)
at /shared/src/php/php5-200511191330/main/main.c:1704
#8 0x08332867 in main (argc=2, argv=0xbfdff734)
at /shared/src/php/php5-200511191330/sapi/cli/php_cli.c:1039
It seems that the dbh returned by zend_object_store_get_object(getThis() TSRMLS_CC); does not contain a valid def_stmt_ce when using persistent connections. _object_and_properties_init then segfaults when being passed a null-pointer as the class_type argument.
My guess is an error in the dbh_constructor function, though I'm not sure as I don't know how the inner details of PHP/PDO. If the connection is persistent, dbh_constructor allocates a brand new pdo_dbh_t (pdbh) structure without pointing pdbh->def_stmt_ce to the one pointed to by the old dbh (dbh).
Hope you can figure this out :)
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Last updated: Thu Nov 21 11:01:29 2024 UTC |
Wez, you forgot to copy def_stmt_ce and def_stmt_ctor_args: Index: ext/pdo/pdo_dbh.c =================================================================== RCS file: /repository/php-src/ext/pdo/pdo_dbh.c,v retrieving revision 1.82.2.13 diff -u -p -d -r1.82.2.13 pdo_dbh.c --- ext/pdo/pdo_dbh.c 27 Oct 2005 03:51:23 -0000 1.82.2.13 +++ ext/pdo/pdo_dbh.c 19 Nov 2005 15:44:15 -0000 @@ -341,6 +341,8 @@ static PHP_METHOD(PDO, dbh_constructor) if (pdbh) { /* let's copy the emalloc bits over from the other handle */ pdbh->ce = dbh->ce; + pdbh->def_stmt_ce = dbh->def_stmt_ce; + pdbh->def_stmt_ctor_args = dbh->def_stmt_ctor_args; pdbh->properties = dbh->properties; /* kill the non-persistent thingamy */ efree(dbh);