PHP Extension return structure - structure

Question

I am working on a PHP extension and wants to let PHP returns a structure. But it always cause core dump. My step is:
./ext_skel --extname=test
./configure --enable-test
in php_test.h, add:
typedef struct mydata {
int m_id;
int m_age;
}MYDATA;
PHP_FUNCTION(wrap_getMydata);`
In test.c, add:
#define MY_RES_NAME "my_resource";
static int my_resource_descriptor;
PHP_FE(wrap_getMydata, NULL)
...
ZEND_MINIT_FUNCTION(test)
{
/* If you have INI entries, uncomment these lines
REGISTER_INI_ENTRIES();
*/
resid = zend_register_list_destructors_ex(NULL, NULL, MY_RES_NAME, module_number);
return SUCCESS;
}
PHP_FUNCTION(test_getMydata)
{
zval* res;
long int a, b;
long int result;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ll", &a, &b) == FAILURE) {
return;
}
MYDATA objData;
objData.m_id = a;
objData.m_age = b;
ZEND_REGISTER_RESOURCE(res, &objData, resid);
RETURN_RESOURCE(res);
}
add: var_dump(test_getMydata(3,4)) in test.php
then make; make install; ./php test.php, it prints:
Functions available in the test extension:
confirm_wrap_compiled
test_getMydata
Congratulations! You have successfully modified ext/wrap/config.m4. Module wrap is now compiled into PHP.
Segmentation fault (core dumped)
$ gdb ../../bin/php core.23310
Loaded symbols for /home/user1/php/php-5.2.17/lib/php/extensions/no-debug-non-zts-20060613/test.so
#0 0x00000000006388ad in execute (op_array=0x2a9569bd68) at /home/user1/php/php-5.2.17/Zend/zend_vm_execute.h:92
92 if (EX(opline)->handler(&execute_data TSRMLS_CC) > 0) {`
Can someone give some help?

Answer 1

sorry for the bad formatting in the comment - here is my final answer:
i had to rename the extension from test enter code hereto hjtest - everthing else should be pretty much in line with your posted sample.
tl;dr - the problem - and SIGSEGV in your sample is that you are registering a resource to a local variable objData - wich at the end of the function is not reachable anymore - you need to use emalloc to get a piece of dynamic memory - wich holds your MYDATA
as from there you have a resource - bound to some piece of dyn. memory, you need to register a dtor function - so you can release/efree your registered memory.
hope that helps.
to solve the above issue - modifie your resource registration like this:
MYDATA * objData=emalloc(sizeof(MYDATA));
objData->m_id = a;
objData->m_age = b;
ZEND_REGISTER_RESOURCE(return_value, objData, resid);
and add a dtor:
... MINIT
resid = zend_register_list_destructors_ex(resdtor, NULL, MY_RES_NAME, module_number);
and
static void resdtor(zend_rsrc_list_entry *rsrc TSRMLS_DC)
{
MYDATA *res = (MYDATA*)rsrc->ptr;
if (res) {
efree(res);
}
}
for full sample see this GIST: https://gist.github.com/hjanuschka/3ed54e66f017a379cf25