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libtrace.c
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libtrace.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*-
*
* Simulator Trace Library Routines
*
* Copyright (C) 1995-2007, Hewlett-Packard Development Company, L.P.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
/*##################### Header and Constant Definitions ####################*/
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#if defined __linux__
# include <sys/time.h>
#endif /* !defined __linux__ */
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/param.h> /* for MIN */
#include "std.h" /* remove if get rid of BOOL dependence */
#include "libtrace.h"
#include "package.h"
#include "types.h"
#include "state.h"
#include "ui.h"
#define HEADER_VERSION 0x10001
#define TRACE_VERSION 0x10000
/* Change version numbers because header and trace records changed?
for at least branch prediction. Why are these defines here and
not in libtrace.h? */
#define MAXTRCBUF (BUFSIZ * 100)
extern FILE *tracef;
/*##################### Local Variables ####################################*/
/* Trace Output */
static unsigned short out_treclen[MAXTREC];
static unsigned char out_trcbuf[MAXTRCBUF];
static unsigned char *outbufp = out_trcbuf;
/*##################### Functions and Subroutines ##########################*/
/*************************/
/* Trace Output Routines */
/*************************/
/*-------------------------------------------------------------------------
* trace$OutputFile$Initialize - Open the trace output file, and write the trace
* header structure to it. Some of the fields in the header structure are
* uninitialized. They will be subsequently filled up by the record
* conversion tool.
*------------------------------------------------------------------------*/
BOOL traceOutInit(char *trfile, char *mode, double virtcycle, char *toolname)
{
Trace_Header trhdr;
char infobuf[BUFSIZ];
#ifndef __ia64
char buf[100];
struct hostent *hostinfo;
struct in_addr hostaddr;
#endif
char *p = infobuf, *pbuf;
struct timeval t;
struct timezone tz;
unsigned i;
if (!(tracef = fopen(trfile, mode))) {
cmdErr("Could not open trace output file %s\n", trfile);
return NO;
}
trhdr.header_version.version = HEADER_VERSION >> 16;
trhdr.header_version.revision = (HEADER_VERSION & 0xFFFF);
trhdr.trace_version.version = TRACE_VERSION >> 16;
trhdr.trace_version.revision = (TRACE_VERSION & 0xFFFF);
trhdr.trace_rec_offset = 0;
/* Final value is initialized when the rest of the header information
has been initialized, and again by the conversion tool */
trhdr.number_trace_rec = 0;
/* Zero to allow piping output. Final value is initialized when file
is closed (do I need another function for this?), and again by the
conversion tool */
trhdr.virtual_cycle = virtcycle;
trhdr.compression_ptr = 0; /* No compression */
trhdr.valid_header_fields = 0;
/* Final value are initialized by the conversion tool */
trhdr.valid_record_fields = IREGION_VALID | SLOTS_VALID |
VCYCLE_INCR_VALID | IOFFSET_VALID |
BUNDLE_VALID | DOFFSET_0_VALID |
DOFFSET_1_VALID | DOFFSET_2_VALID;
trhdr.valid_record_flags = DISCONTINUITY_VALID;
/* Since the first release is to run on application mode, there is
no need to support CONTEXT_SWITCH_VALID or INTERRUPT_VALID */
trhdr.valid_slot_flags = BR_TAKEN_VALID | QPRED_VALID | DREGION_VALID;
trhdr.doffset_usage = DOFFSET_MEMORY | DOFFSET_PFS |
DOFFSET_BRPRED | DOFFSET_ARTGT;
trhdr.res_0_mbz = 0;
trhdr.Elf64_Ehdr_e_machine = 0;
trhdr.Elf64_Ehdr_e_flags = 0;
/* These two fields are initialized by the conversion tool */
if (!gettimeofday(&t, &tz))
trhdr.sim_time = t.tv_sec;
else
trhdr.sim_time = 0; /* Set to Jan. 1, 1970 */
#ifndef __ia64
if (!gethostname(buf, sizeof buf))
if ((hostinfo = gethostbyname(buf))) {
hostaddr.s_addr = *((unsigned long *)(hostinfo->h_addr_list[0]));
if ((pbuf = inet_ntoa(hostaddr))) {
trhdr.ip_ptr = sizeof(Trace_Header) + (p - infobuf);
p += sprintf(p, "%s", pbuf) + 1;
} else
trhdr.ip_ptr = 0; /* No IP address */
} else
trhdr.ip_ptr = 0; /* No IP address */
else
#endif
trhdr.ip_ptr = 0; /* No IP address */
if ((pbuf = getlogin())) {
trhdr.user_ptr = sizeof (Trace_Header) + (p - infobuf);
p += sprintf(p, "%s", pbuf) + 1;
} else
trhdr.user_ptr = 0; /* No user name */
if (toolname && strlen(toolname)) {
trhdr.tool_name_ptr = sizeof (Trace_Header) + (p - infobuf);
p += sprintf(p, "%s", toolname) + 1;
} else
trhdr.tool_name_ptr = 0; /* No tool name */
trhdr.uarch_ptr = 0;
trhdr.workload_ptr = 0;
trhdr.trace_name_ptr = 0;
trhdr.comments_ptr = 0;
/* These four fields are initialized by the conversion tool */
trhdr.trace_rec_offset = sizeof (Trace_Header) + (p - infobuf);
/* We now know where the first trace record will be stored */
out_treclen[CANONICAL_TREC] = 0;
/* Not directly generated by the library, but by the conversion tool */
out_treclen[STALL_LATENCY_TREC] = sizeof (Stall_Latency_Trec);
out_treclen[STALL_TREC] = sizeof (Stall_Trec);
out_treclen[CAPSULE_TREC] = sizeof (Capsule_Trec);
out_treclen[CONTEXT_SWITCH_TREC] = 0;
out_treclen[INTERRUPTION_TREC] = sizeof (Interruption_Trec);
/* Since the first release is to run on application mode, these two
trace records are not generated */
out_treclen[DISCONTINUITY_TREC] = sizeof (Discontinuity_Trec);
out_treclen[VIRT_CYCLE_TREC] = sizeof (Virt_Cycle_Trec);
out_treclen[IOFFSET_TREC] = sizeof (Ioffset_Trec);
out_treclen[BUNDLE_TREC] = sizeof (Bundle_Trec);
out_treclen[BRANCH_TREC] = sizeof (Branch_Trec);
out_treclen[DOFFSET_TREC] = sizeof (Doffset_Trec);
out_treclen[PREV_PFS_TREC] = sizeof (Prev_Pfs_Trec);
out_treclen[BRPRED_TREC] = sizeof (Br_Pred_Trec);
out_treclen[ARTGT_TREC] = sizeof (Ar_Tgt_Trec);
out_treclen[END_OF_TRACE_TREC] = sizeof (End_of_Trace_Trec);
/* XXX - use memcpy */
for (i = 0; i < MAXTREC; i++)
trhdr.record_lengths[i] = out_treclen[i];
if (!fwrite(&trhdr, sizeof trhdr, 1, tracef)) {
cmdErr("Could not write trace header to file %s\n", trfile);
(void)fclose(tracef);
tracef = NULL;
return NO;
}
if (p > infobuf && fwrite(infobuf, 1, (unsigned)(p - infobuf), tracef)
< (unsigned)(p - infobuf)) {
cmdErr("Could not write information block to file %s\n", trfile);
(void)fclose(tracef);
tracef = NULL;
return NO;
}
return YES;
}
/*-------------------------------------------------------------------------
* traceBuffer$Flush - Flush the trace buffer to the output file. Reset
* the trace buffer.
*------------------------------------------------------------------------*/
int traceFlush(FILE *fp)
{
unsigned cursz = outbufp - out_trcbuf;
int status = 0;
if (fwrite(out_trcbuf, 1, cursz, fp) < cursz || fflush(fp))
status = -1;
outbufp = out_trcbuf;
return status;
}
/*-------------------------------------------------------------------------
* trace$OutputFile$Close - Close trace output file.
*------------------------------------------------------------------------*/
int traceOutClose(void)
{
static End_of_Trace_Trec eot_trec = { END_OF_TRACE_TREC };
if (!tracef)
return 0;
/* TBD: update the header's trace record count */
if (!traceWrite(tracef, &eot_trec) && !traceFlush(tracef))
return fclose(tracef);
else {
(void)fclose(tracef);
return EOF;
}
}
/*-------------------------------------------------------------------------
* traceRecord$Write - Send a trace record to the trace output file. The
* library buffers several trace records before actually writing out the
* trace records.
*------------------------------------------------------------------------*/
int traceWrite(FILE *fp, void *trcrec)
{
unsigned trclen = out_treclen[*(unsigned char *)trcrec];
unsigned cursz = outbufp - out_trcbuf;
int status = 0;
if ((cursz + trclen) > MAXTRCBUF) {
if (fwrite(out_trcbuf, 1, cursz, fp) < cursz)
status = -1;
outbufp = out_trcbuf;
}
(void)memcpy(outbufp, trcrec, trclen);
outbufp += trclen;
return status;
}