The test case ext/sockets/tests/socket_recvmsg.php has following output
on x86_64:

=======
...
1 Array
2 (
3 [name] => Array
4 (
5 [family] => 10
6 [addr] => ::1
7 [port] => 7001
8 [flowinfo] => 0
9 [scope_id] => 0
10 )
11
12 [control] => Array
13 (
14 [0] => Array
15 (
16 [level] => 41
17 [type] => 50
18 [data] => Array
19 (
20 [addr] => ::1
21 [ifindex] => 1
22 )
23 )
24 )
...

This is output by c
function:"socket_recvmsg"(/home/work/php/php/ext/sockets/sendrecvmsg.c:214),
which returns a struct "executor_globals.current_execute_data".

The struct is defined as :

(gdb) ptype executor_globals.current_execute_data
type = struct _zend_execute_data {
const zend_op *opline;
zend_execute_data *call;
zval *return_value;
zend_function *func;
zval This;
zend_execute_data *prev_execute_data;
zend_array *symbol_table;
void **run_time_cache;
zval *literals;
} *

Where do the above output values (line 18-21) store in the struct
_zend_execute_data ?

Thanks,

Sam

The return data in PHP is "$data" which is an array with 4 elements,
does it match to "zmsg" inside of c function
"socket_recvmsg"(/home/work/php/php/ext/sockets/sendrecvmsg.c:214)?

Here zmsg is struct with:

(gdb) ptype zmsg
type = struct _zval_struct {
zend_value value;
union {
struct {...} v;
uint32_t type_info;
} u1;
union {
uint32_t next;
uint32_t cache_slot;
uint32_t lineno;
uint32_t num_args;
uint32_t fe_pos;
uint32_t fe_iter_idx;
uint32_t access_flags;
uint32_t property_guard;
uint32_t extra;
} u2;
} *

How do these two variables match between php and C?

Thanks,

Sam

Sam Ding/Toronto/IBM wrote on 01/26/2018 09:36:00 AM:

From: Sam Ding/Toronto/IBM
To: Kalle Sommer Nielsen kalle@php.net
Cc: PHP internals internals@lists.php.net, kalle.php@gmail.com
Date: 01/26/2018 09:36 AM
Subject: Re: [PHP-DEV] return values of socket_recvmsg

Thank Kalle,

I knew the implementaion of socket_recvmsg(), but want to know the
return data structure.
The test on Big_endian (s390x) got a little different return result
than on x86_64, try to dig out
where the problem is.

Thanks,

Sam

kalle.php@gmail.com wrote on 01/26/2018 01:58:23 AM:

From: Kalle Sommer Nielsen kalle@php.net
To: Sam Ding samding@ca.ibm.com
Cc: PHP internals internals@lists.php.net
Date: 01/26/2018 01:58 AM
Subject: Re: [PHP-DEV] return values of socket_recvmsg
Sent by: kalle.php@gmail.com

Hi Sam

2018-01-25 23:11 GMT+01:00 Sam Ding samding@ca.ibm.com:

The test case ext/sockets/tests/socket_recvmsg.php has following
output
on x86_64:

=======
...
1 Array
2 (
3 [name] => Array
4 (
5 [family] => 10
6 [addr] => ::1
7 [port] => 7001
8 [flowinfo] => 0
9 [scope_id] => 0
10 )
11
12 [control] => Array
13 (
14 [0] => Array
15 (
16 [level] => 41
17 [type] => 50
18 [data] => Array
19 (
20 [addr] => ::1
21 [ifindex] => 1
22 )
23 )
24 )
...

This is output by c
function:"socket_recvmsg"(/home/work/php/php/ext/sockets/
sendrecvmsg.c:214),

You can find the implementation of socket_recvmsg() in the ext/sockets
directory here:
https://urldefense.proofpoint.com/v2/url?

u=http-3A__git.php.net_-3Fp-3Dphp-2Dsrc.git-3Ba-3Dblob-3Bf-3Dext_sockets_sendrecvmsg.c-3Bh-3D7b9c4e8ad357b73b514dc5feb8dc8d9ca215126b-3Bhb-3DHEAD-23l210&d=DwIBaQ&c=jf_iaSHvJObTbx-

siA1ZOg&r=CBZ1IFMUPf-s4Wt-

elABGKFWisr3DNfFfWYNaKkXXUE&m=f8KTE9WyceLmQxKXG77FBkDIVqCnJ54BBnXEQuSQCo4&s=GOFChuk86IBBBORDL3I50gHrzmF4kTmYkq1qCeMufBQ&e=

--
regards,

Kalle Sommer Nielsen
kalle@php.net