Hello,
ip/ping -r -f www.google.com
io% ip/ping -r -f www.google.com
sending 32 64 byte messages 0 ms apart to icmp!www.google.com!1
ping 34691: suicide: sys: trap: divide error pc=0x00003953
0: rtt 9797 µs, avg rtt 9797 µs, ttl = 245
io% ps
...
arisawa 34679 0:00 0:00 128K Pread tcp17010
arisawa 34691 0:00 0:00 140K Broken ping
arisawa 34695 0:00 0:00 140K Pread ping
arisawa 34696 0:00 0:00 192K Pread ps
io% acid 34691
/proc/34691/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: lstk()
nrand(n=0x0)+0x18 /sys/src/libc/port/nrand.c:13
slop=0xa39fb2cf
sender(msglen=0x40,n=0x20,interval=0x0,fd=0x6)+0x151 /sys/src/cmd/ip/
ping.c:268
seq=0xef0c4ef8
buf=0x0
icmp=0xdffeed0e
me=0x0
mev4=0x501a8c0
i=0x1
r=0x22b78
main(argv=0xdfffefa0,argc=0x1)+0x212 /sys/src/cmd/ip/ping.c:571
interval=0x0
msglen=0x40
nmsg=0x20
_argc=0x66
_args=0xdfffefb8
ds=0x11534
fd=0x6
_main+0x31 /sys/src/libc/386/main9.s:16
acid:
echo kill > /proc/34691/ctl
io% cat /sys/src/libc/port/nrand.c
#include <u.h>
#include <libc.h>
#define MASK 0x7fffffffL
int
nrand(int n)
{
long slop, v;
if(n < 0)
return n;
slop = MASK % n;
do
v = lrand();
while(v <= slop);
return v % n;
}
Think that where and why nrand(0) is executed and fix the problem.
Kenji Arisawa
On 2009/03/09, at 18:38, ROuNIN wrote:
Hello all,
I would like to learn how to fix this in the ping C code, I am new to
plan9 and C
ip/ping -r -f www.google.com
sending 32 64 bytes messages 0 ms apart to icmp!www.google.com!1
ping 238: suicide: sys: trap: divide error pc=0x00003953
term% 0: rrt 38841 us, avg rtt 38841 us, ttl = 128
ROuNIN
