On Tue, Oct 27, 2015 at 01:06:46PM +0300, Maxim Uvarov wrote:
> Hi Stuart,
>
> make check under root says that you deference null pointer.
>
>
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
> Core was generated by
> `/opt/Linaro/odp2.git/test/performance/.libs/lt-odp_l2fwd -i
> pktiop1p0,pktiop2p3'.
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0 0x00002ba318e13453 in pkt_mmap_v2_tx (sock=4,
> ring=0x2ba318aae700, pkt_table=0x2ba31e9ecdc0, len=16) at
> pktio/socket_mmap.c:221
> 221 if (odp_likely(hdr->tp_status == TP_STATUS_AVAILABLE)) {
> (gdb) bt
> #0 0x00002ba318e13453 in pkt_mmap_v2_tx (sock=4,
> ring=0x2ba318aae700, pkt_table=0x2ba31e9ecdc0, len=16) at
> pktio/socket_mmap.c:221
> #1 0x00002ba318e13fee in sock_mmap_send
> (pktio_entry=0x2ba318aae640, pkt_table=0x2ba31e9ecdc0, len=16) at
> pktio/socket_mmap.c:489
> #2 0x00002ba318e1075d in odp_pktio_send (id=0x2,
> pkt_table=0x2ba31e9ecdc0, len=16) at odp_packet_io.c:420
> #3 0x0000000000401f26 in pktio_direct_recv_thread
> (arg=0x2ba318ad3030) at odp_l2fwd.c:270
> #4 0x00002ba318bf9a07 in odp_run_start_routine (arg=0x1376950) at
> linux.c:35
> #5 0x00002ba319035182 in start_thread (arg=0x2ba31e9ed700) at
> pthread_create.c:312
> #6 0x00002ba31934547d in clone () at
> ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
> (gdb) p hdr
> $1 = (struct tpacket2_hdr *) 0x0
> (gdb) l
> 216 * after some of the packets in the ring have already
> been sent, so we
> 217 * need to inspect the packet status to determine which
> were sent. */
> 218 for (n = first_frame_num; n < first_frame_num + i; ++n) {
> 219 struct tpacket2_hdr *hdr = ring->rd[n].iov_base;
> 220
> 221 if (odp_likely(hdr->tp_status == TP_STATUS_AVAILABLE)) {
> 222 nb_tx++;
> 223 } else if (hdr->tp_status & TP_STATUS_WRONG_FORMAT) {
> 224 /* status will be cleared on the next send request */
> 225 break;
> (gdb)
Argh. Obviously this doesn't happen when I run the test, but I can now
see the problem. I'll fix and send an updated series.
--
Stuart.
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