#35620 [Opn->Asn]: access violation on odbc query
ID: 35620
Updated by: sniper@php.net
Reported By: humbads at alum dot mit dot edu
-Status: Open
+Status: Assigned
-Bug Type: ODBC related
+Bug Type: PDO related
Operating System: Windows XP SP2
PHP Version: 5CVS-2005-12-10 (snap)
-Assigned To:
+Assigned To: wez
Previous Comments:
------------------------------------------------------------------------
[2005-12-10 08:43:54] humbads at alum dot mit dot edu
The same crash occurs if the code is simply within a function, rather
than a class. Furthermore, the same crash occurs if another data source
is used, e.g. SQL Server.
myfunction();
function myfunction() {
$odbc = new PDO("odbc:Driver={Microsoft Visual FoxPro
Driver};SourceType=DBF;SourceDB=C:\\");
$query = "SELECT * FROM invoice";
$result = $odbc->query($query);
}
------------------------------------------------------------------------
[2005-12-10 08:24:07] humbads at alum dot mit dot edu
Description:
------------
php-cgi.exe crashes with an access violation when using PDO ODBC to run
a simple query as given below. The code runs without error if not
enclosed in a class. It also runs without error if the query is run
without saving the return value in $result. The stack trace indicates a
crash when destroying the implicit prepared statement.
Reproduce code:
---------------
$mc = new MyClass;
class MyClass {
function MyClass() {
$odbc = new PDO("odbc:Driver={Microsoft Visual FoxPro
Driver};SourceType=DBF;SourceDB=C:\\");
$query = "SELECT * FROM invoice";
$result = $odbc->query($query);
die("happy");
}
}
Expected result:
----------------
It should not crash when returning the result, or when running from
within a class.
Actual result:
--------------
> ntdll.dll!_RtlEnterCriticalSection@4() + 0xb
odbc32.dll!CCriticalSection::Enter() + 0xf
odbc32.dll!_ODBCEnterCriticalSection@4() + 0xf
odbc32.dll!_EnterStmtCS@4() + 0x23
odbc32.dll!_SQLCloseCursor@4() + 0x2b
php_pdo_odbc.dll!odbc_stmt_dtor(_pdo_stmt_t * stmt=0x00720448, void *
* * tsrm_ls=0x00323eb0) Line 56 C
php_pdo.dll!free_statement(_pdo_stmt_t * stmt=0x00720448, void * * *
tsrm_ls=0x00323eb0) Line 2118 + 0x8 C
php_pdo.dll!php_pdo_stmt_delref(_pdo_stmt_t * stmt=0x00720448, void *
* * tsrm_ls=0x00323eb0) Line 2157 + 0xb C
php_pdo.dll!pdo_dbstmt_free_storage(_pdo_stmt_t * stmt=0x00720448,
void * * * tsrm_ls=0x00323eb0) Line 2162 + 0xf C
php5ts.dll!zend_objects_store_free_object_storage(_zend_objects_store
* objects=0x00328dc4, void * * * tsrm_ls=0x00323eb0) Line 83 + 0xb C
php5ts.dll!shutdown_executor(void * * * tsrm_ls=0x00a232c0) Line 273
+ 0x13 C
ntdll.dll!_RtlpFreeToHeapLookaside@8() + 0x26
Unhandled exception at 0x7c901010 (ntdll.dll) in php-cgi.exe:
0xC0000005: Access violation reading location 0x00000018.
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