[dtrace-discuss] trace: error on enabled probe ID invalid address

[Hans-Peter]

Hi 

I am trying to make a dtrace script that captures tcp packets sent by a 
specific process.

But I receive the message:
dtrace: error on enabled probe ID 3 (ID 35884: 
fbt:sockfs:sostream_direct:return): invalid address (0x106390000) in action #1 
at DIF offset 12

Can someone explain why this happens?

regards HansP

#!/usr/sbin/dtrace -Cs
 /*
  * Command line arguments
  */
 #include <sys/file.h>
#include <inet/common.h>
#include <sys/byteorder.h>
#include <sys/socket.h>
#include <sys/socketvar.h>

/*
 * Print header
 */
dtrace:::BEGIN
{
        /* starting values */
        counts = COUNTER;
        secs = INTERVAL;
        TCP_out = 0;
        TCP_in = 0;

        printf("Tracing... Please wait.\n");

        start = 0;
}

fbt:sockfs:sostream_direct:entry
/ pid == $1 && start == 0 /
{
        self->sop = 1;
        self->nsop = (struct sonode *)arg1;
        self->tcpp = (tcp_t *)self->nsop->so_priv;
        self->laddrs = self->nsop->so_laddr_sa;
        start = 1;
        printf("%50s : 
%10d\n","fbt:sockfs:sostream_direct:entry",self->nsop->so_sndbuf);
}

fbt:sockfs:sostream_direct:return
/ pid == $1 && start == 1 /
{
        self->connp = (conn_t *)self->tcpp->tcp_connp;
        /*printf("%50s 
%10d\n","fbt:sockfs:sostream_direct:return",self->laddr->soa_len); */
        printf("%50s \n","fbt:sockfs:sostream_direct:return");
}
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