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/*
* Copyright (c) 2001-2002 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 1998-2001 University of Notre Dame.
* All rights reserved.
* Copyright (c) 1994-1998 The Ohio State University.
* All rights reserved.
*
* This file is part of the LAM/MPI software package. For license
* information, see the LICENSE file in the top level directory of the
* LAM/MPI source distribution.
*
* $HEADER$
* Ohio Trollius
* Copyright 1994 The Ohio State University
* GDB
*
* Function: - unloads trace data from remote trace daemon
*/
#include <lam_config.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <etc_misc.h>
#include <events.h>
#include <ksignal.h>
#include <net.h>
#include <trreq.h>
#include <typical.h>
/*
* local functions
*/
static int4 rtr();
/*
* lam_rtrfget
*
* Function: - reads trace data from remote node
* Accepts: - target node ID
* - list number
* - process ID
* - file descriptor
* Returns: - total length of received trace data
*/
int4
lam_rtrfget(nodeid, lnum, pid, fd)
int4 nodeid;
int4 lnum;
int4 pid;
int fd;
{
return(rtr(nodeid, lnum, pid, fd, TRQGET));
}
/*
* lam_rtrfforget
*
* Function: - destructively reads trace data from remote node
* Accepts: - target node ID
* - list number
* - process ID
* - file descriptor
* Returns: - total length of received trace data
*/
int4
lam_rtrfforget(nodeid, lnum, pid, fd)
int4 nodeid;
int4 lnum;
int4 pid;
int fd;
{
return(rtr(nodeid, lnum, pid, fd, TRQFORGET));
}
/*
* rtr
*
* Function: - unloads trace data from remote node
* - writes trace data into file
* Accepts: - target node ID
* - list number
* - process ID
* - file descriptor
* - traced request code
* Returns: - total length of received trace data
*/
static int4
rtr(nodeid, lnum, pid, fd, req)
int4 nodeid;
int4 lnum;
int4 pid;
int4 req;
int fd;
{
struct nmsg nhead; /* network message desc. */
struct trreq *request; /* traced request */
struct trreply *reply; /* traced reply */
int4 trtotal; /* total matching traces */
int4 trleft; /* traces left to receive */
int4 mask; /* favourite index */
request = (struct trreq *) nhead.nh_data;
reply = (struct trreply *) nhead.nh_data;
request->trq_src_node = (nodeid == LOCAL) ? nodeid : getnodeid();
request->trq_src_event = -lam_getpid();
request->trq_req = req;
request->trq_lnum = lnum;
request->trq_pid = pid;
nhead.nh_node = nodeid;
nhead.nh_event = EVTRACED;
nhead.nh_type = 0;
nhead.nh_flags = 0;
nhead.nh_length = 0;
nhead.nh_msg = 0;
mask = ksigblock(sigmask(SIGUDIE) | sigmask(SIGARREST));
if (nsend(&nhead)) {
ksigsetmask(mask);
return(LAMERROR);
}
/*
* Receive total trace length.
*/
nhead.nh_event = -lam_getpid();
nhead.nh_type = 0;
nhead.nh_length = 0;
nhead.nh_msg = 0;
if (nrecv(&nhead)) {
ksigsetmask(mask);
return(LAMERROR);
}
trtotal = reply->trr_length;
trleft = reply->trr_length;
if (trtotal > 0) {
nhead.nh_msg = malloc((unsigned) MAXNMSGLEN);
if (nhead.nh_msg == 0) {
ksigsetmask(mask);
return(LAMERROR);
}
}
while ((trleft > 0) && (reply->trr_errno == 0)) {
nhead.nh_type = 0;
nhead.nh_length = MAXNMSGLEN;
if (nrecv(&nhead)) {
free(nhead.nh_msg);
ksigsetmask(mask);
return(LAMERROR);
}
if (write(fd, nhead.nh_msg, nhead.nh_length) < 0) {
free(nhead.nh_msg);
ksigsetmask(mask);
return(LAMERROR);
}
trleft -= nhead.nh_length;
}
ksigsetmask(mask);
if (trtotal > 0) {
free(nhead.nh_msg);
}
if (reply->trr_errno) {
errno = reply->trr_errno;
return(LAMERROR);
} else {
return(trtotal);
}
}
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