715 lines
17 KiB
C
715 lines
17 KiB
C
/*
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef lint
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char copyright[] =
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"@(#) Copyright (c) 1983 Regents of the University of California.\n\
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All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)gprof.c 5.6 (Berkeley) 6/1/90";
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#endif /* not lint */
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#include "gprof.h"
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bfd *abfd;
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char *whoami = "gprof";
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/*
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* things which get -E excluded by default.
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*/
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char *defaultEs[] = { "mcount" , "__mcleanup" , 0 };
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int discard_underscores = 1; /* Should we discard initial underscores? */
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int bsd_style_output = 0; /* As opposed to FSF style output */
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main(argc, argv)
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int argc;
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char **argv;
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{
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char **sp;
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nltype **timesortnlp;
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--argc;
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argv++;
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debug = 0;
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bflag = TRUE;
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while ( *argv != 0 && **argv == '-' ) {
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(*argv)++;
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switch ( **argv ) {
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case 'a':
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aflag = TRUE;
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break;
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case 'b':
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bflag = FALSE;
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break;
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case 'c':
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cflag = TRUE;
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break;
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case 'd':
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dflag = TRUE;
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(*argv)++;
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debug |= atoi( *argv );
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debug |= ANYDEBUG;
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# ifdef DEBUG
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printf("[main] debug = %d\n", debug);
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# else not DEBUG
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printf("%s: -d ignored\n", whoami);
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# endif DEBUG
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break;
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case 'E':
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++argv;
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addlist( Elist , *argv );
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Eflag = TRUE;
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addlist( elist , *argv );
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eflag = TRUE;
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break;
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case 'e':
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addlist( elist , *++argv );
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eflag = TRUE;
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break;
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case 'F':
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++argv;
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addlist( Flist , *argv );
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Fflag = TRUE;
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addlist( flist , *argv );
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fflag = TRUE;
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break;
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case 'f':
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addlist( flist , *++argv );
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fflag = TRUE;
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break;
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case 'k':
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addlist( kfromlist , *++argv );
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addlist( ktolist , *++argv );
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kflag = TRUE;
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break;
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case 's':
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sflag = TRUE;
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break;
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case 'T': /* "Traditional" output format */
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bsd_style_output = 1;
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break;
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case 'z':
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zflag = TRUE;
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break;
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}
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argv++;
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}
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if ( *argv != 0 ) {
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a_outname = *argv;
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argv++;
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} else {
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a_outname = A_OUTNAME;
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}
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if ( *argv != 0 ) {
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gmonname = *argv;
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argv++;
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} else {
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gmonname = GMONNAME;
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}
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/*
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* turn off default functions
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*/
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for ( sp = &defaultEs[0] ; *sp ; sp++ ) {
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Eflag = TRUE;
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addlist( Elist , *sp );
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eflag = TRUE;
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addlist( elist , *sp );
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}
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/*
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* how many ticks per second?
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* if we can't tell, report time in ticks.
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*/
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hz = hertz();
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if (hz == 0) {
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hz = 1;
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fprintf(stderr, "time is in ticks, not seconds\n");
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}
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/*
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* get information about a.out file.
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*/
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getnfile();
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/*
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* get information about mon.out file(s).
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*/
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do {
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getpfile( gmonname );
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if ( *argv != 0 ) {
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gmonname = *argv;
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}
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} while ( *argv++ != 0 );
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/*
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* dump out a gmon.sum file if requested
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*/
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if ( sflag ) {
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dumpsum( GMONSUM );
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}
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/*
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* assign samples to procedures
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*/
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asgnsamples();
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/*
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* assemble the dynamic profile
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*/
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timesortnlp = doarcs();
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if (bsd_style_output) {
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printgprof( timesortnlp ); /* print the dynamic profile */
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printprof(); /* print the flat profile */
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} else {
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printprof(); /* print the flat profile */
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printgprof( timesortnlp ); /* print the dynamic profile */
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}
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/*
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* print the index
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*/
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printindex();
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done();
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}
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/*
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* Set up string and symbol tables from a.out.
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* and optionally the text space.
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* On return symbol table is sorted by value.
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*/
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getnfile()
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{
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int valcmp();
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abfd = bfd_openr (a_outname, NULL);
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if (abfd == NULL) {
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perror (a_outname);
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done();
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}
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if (!bfd_check_format (abfd, bfd_object)) {
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fprintf (stderr, "%s: %s: bad format\n", whoami, a_outname);
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done();
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}
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/* getstrtab(nfile); */
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getsymtab(abfd);
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gettextspace( abfd );
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qsort(nl, nname, sizeof(nltype), valcmp);
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# ifdef DEBUG
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if ( debug & AOUTDEBUG ) {
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register int j;
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for (j = 0; j < nname; j++){
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printf("[getnfile] 0X%08x\t%s\n", nl[j].value, nl[j].name);
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}
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}
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# endif DEBUG
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}
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/*
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* Read in symbol table
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*/
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getsymtab(abfd)
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bfd *abfd;
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{
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register long i;
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int askfor;
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int nosyms;
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asymbol **syms;
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i = get_symtab_upper_bound (abfd); /* This will probably give us more
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* than we need, but that's ok.
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*/
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syms = (asymbol**)xmalloc (i);
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nosyms = bfd_canonicalize_symtab (abfd, syms);
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nname = 0;
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for (i = 0; i < nosyms; i++) {
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if (!funcsymbol (syms[i]))
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continue;
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nname++;
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}
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if (nname == 0) {
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fprintf(stderr, "%s: %s: no symbols\n", whoami , a_outname );
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done();
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}
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askfor = nname + 1;
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nl = (nltype *) calloc( askfor , sizeof(nltype) );
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if (nl == 0) {
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fprintf(stderr, "%s: No room for %d bytes of symbol table\n",
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whoami, askfor * sizeof(nltype) );
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done();
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}
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/* pass2 - read symbols */
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npe = nl;
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nname = 0;
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for (i = 0; i < nosyms; i++) {
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if (!funcsymbol (syms[i])) {
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# ifdef DEBUG
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if ( debug & AOUTDEBUG ) {
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printf( "[getsymtab] rejecting: 0x%x %s\n" ,
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syms[i]->value, syms[i]->name);
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}
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# endif DEBUG
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continue;
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}
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/* Symbol offsets are always section-relative. */
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npe->value = syms[i]->value + syms[i]->section->vma;
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npe->name = syms[i]->name;
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/* If we see "main" without an initial '_', we assume
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names are *not* prefixed by '_'. */
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if (npe->name[0] == 'm' && discard_underscores
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&& strcmp(npe->name, "main") == 0)
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discard_underscores = 0;
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# ifdef DEBUG
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if ( debug & AOUTDEBUG ) {
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printf( "[getsymtab] %d %s 0x%08x\n" ,
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nname , npe -> name , npe -> value );
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}
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# endif DEBUG
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npe++;
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nname++;
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}
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npe->value = -1;
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}
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/*
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* read in the text space of an a.out file
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*/
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gettextspace( abfd )
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bfd *abfd;
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{
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asection *texsec;
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if ( cflag == 0 ) {
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return;
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}
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texsec = bfd_get_section_by_name (abfd, ".text");
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if (texsec == NULL) {
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return;
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}
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textspace = (u_char *) malloc( texsec->_cooked_size );
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if ( textspace == 0 ) {
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fprintf( stderr , "%s: ran out room for %d bytes of text space: " ,
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whoami , texsec->_cooked_size);
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fprintf( stderr , "can't do -c\n" );
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return;
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}
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bfd_get_section_contents (abfd, texsec, textspace, texsec->filepos,
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texsec->_cooked_size);
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}
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/*
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* information from a gmon.out file is in two parts:
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* an array of sampling hits within pc ranges,
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* and the arcs.
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*/
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getpfile(filename)
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char *filename;
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{
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FILE *pfile;
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FILE *openpfile();
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struct rawarc arc;
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pfile = openpfile(filename);
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readsamples(pfile);
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/*
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* the rest of the file consists of
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* a bunch of <from,self,count> tuples.
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*/
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while ( fread( &arc , sizeof arc , 1 , pfile ) == 1 ) {
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arc.raw_frompc = bfd_get_32 (abfd, (bfd_byte *) &arc.raw_frompc);
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arc.raw_selfpc = bfd_get_32 (abfd, (bfd_byte *) &arc.raw_selfpc);
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arc.raw_count = bfd_get_32 (abfd, (bfd_byte *) &arc.raw_count);
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# ifdef DEBUG
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if ( debug & SAMPLEDEBUG ) {
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printf( "[getpfile] frompc 0x%x selfpc 0x%x count %d\n" ,
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arc.raw_frompc , arc.raw_selfpc , arc.raw_count );
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}
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# endif DEBUG
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/*
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* add this arc
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*/
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tally( &arc );
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}
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fclose(pfile);
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}
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FILE *
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openpfile(filename)
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char *filename;
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{
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struct hdr tmp;
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FILE *pfile;
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if((pfile = fopen(filename, "r")) == NULL) {
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perror(filename);
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done();
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}
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fread(&tmp, sizeof(struct hdr), 1, pfile);
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tmp.lowpc = (UNIT *)bfd_get_32 (abfd, (bfd_byte *) &tmp.lowpc);
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tmp.highpc = (UNIT *)bfd_get_32 (abfd, (bfd_byte *) &tmp.highpc);
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tmp.ncnt = bfd_get_32 (abfd, (bfd_byte *) &tmp.ncnt);
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if ( s_highpc != 0 && ( tmp.lowpc != h.lowpc ||
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tmp.highpc != h.highpc || tmp.ncnt != h.ncnt ) ) {
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fprintf(stderr, "%s: incompatible with first gmon file\n", filename);
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done();
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}
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h = tmp;
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s_lowpc = (unsigned long) h.lowpc;
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s_highpc = (unsigned long) h.highpc;
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lowpc = (unsigned long)h.lowpc / sizeof(UNIT);
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highpc = (unsigned long)h.highpc / sizeof(UNIT);
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sampbytes = h.ncnt - sizeof(struct hdr);
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nsamples = sampbytes / sizeof (UNIT);
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# ifdef DEBUG
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if ( debug & SAMPLEDEBUG ) {
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printf( "[openpfile] hdr.lowpc 0x%x hdr.highpc 0x%x hdr.ncnt %d\n",
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h.lowpc , h.highpc , h.ncnt );
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printf( "[openpfile] s_lowpc 0x%x s_highpc 0x%x\n" ,
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s_lowpc , s_highpc );
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printf( "[openpfile] lowpc 0x%x highpc 0x%x\n" ,
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lowpc , highpc );
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printf( "[openpfile] sampbytes %d nsamples %d\n" ,
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sampbytes , nsamples );
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}
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# endif DEBUG
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return(pfile);
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}
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tally( rawp )
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struct rawarc *rawp;
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{
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nltype *parentp;
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nltype *childp;
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parentp = nllookup( rawp -> raw_frompc );
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childp = nllookup( rawp -> raw_selfpc );
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if ( kflag
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&& onlist( kfromlist , parentp -> name )
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&& onlist( ktolist , childp -> name ) ) {
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return;
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}
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childp -> ncall += rawp -> raw_count;
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# ifdef DEBUG
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if ( debug & TALLYDEBUG ) {
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printf( "[tally] arc from %s to %s traversed %d times\n" ,
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parentp -> name , childp -> name , rawp -> raw_count );
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}
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# endif DEBUG
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addarc( parentp , childp , rawp -> raw_count );
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}
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/*
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* dump out the gmon.sum file
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*/
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dumpsum( sumfile )
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char *sumfile;
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{
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register nltype *nlp;
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register arctype *arcp;
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struct rawarc arc;
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FILE *sfile;
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if ( ( sfile = fopen ( sumfile , "w" ) ) == NULL ) {
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perror( sumfile );
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done();
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}
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/*
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* dump the header; use the last header read in
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*/
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if ( fwrite( &h , sizeof h , 1 , sfile ) != 1 ) {
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perror( sumfile );
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done();
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}
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/*
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* dump the samples
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*/
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if (fwrite(samples, sizeof (UNIT), nsamples, sfile) != nsamples) {
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perror( sumfile );
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done();
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}
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/*
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* dump the normalized raw arc information
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*/
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for ( nlp = nl ; nlp < npe ; nlp++ ) {
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for ( arcp = nlp -> children ; arcp ; arcp = arcp -> arc_childlist ) {
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arc.raw_frompc = arcp -> arc_parentp -> value;
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arc.raw_selfpc = arcp -> arc_childp -> value;
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arc.raw_count = arcp -> arc_count;
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if ( fwrite ( &arc , sizeof arc , 1 , sfile ) != 1 ) {
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perror( sumfile );
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done();
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}
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# ifdef DEBUG
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if ( debug & SAMPLEDEBUG ) {
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printf( "[dumpsum] frompc 0x%x selfpc 0x%x count %d\n" ,
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arc.raw_frompc , arc.raw_selfpc , arc.raw_count );
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}
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# endif DEBUG
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}
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}
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fclose( sfile );
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}
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valcmp(p1, p2)
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nltype *p1, *p2;
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{
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if ( p1 -> value < p2 -> value ) {
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return LESSTHAN;
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}
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if ( p1 -> value > p2 -> value ) {
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return GREATERTHAN;
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}
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return EQUALTO;
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}
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readsamples(pfile)
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FILE *pfile;
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{
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register i;
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UNIT sample;
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if (samples == 0) {
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samples = (UNIT *) malloc (sampbytes * sizeof(UNIT));
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if (samples == 0) {
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fprintf( stderr , "%s: No room for %d sample pc's\n",
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whoami , sampbytes / sizeof (UNIT));
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done();
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}
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memset (samples, 0, sampbytes * sizeof(UNIT));
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}
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for (i = 0; i < nsamples; i++) {
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fread(&sample, sizeof (UNIT), 1, pfile);
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sample = bfd_get_16 (abfd, (bfd_byte *) &sample);
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if (feof(pfile))
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break;
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samples[i] += sample;
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}
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if (i != nsamples) {
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fprintf(stderr,
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"%s: unexpected EOF after reading %d/%d samples\n",
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whoami , --i , nsamples );
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done();
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}
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}
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/*
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* Assign samples to the procedures to which they belong.
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*
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* There are three cases as to where pcl and pch can be
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* with respect to the routine entry addresses svalue0 and svalue1
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* as shown in the following diagram. overlap computes the
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* distance between the arrows, the fraction of the sample
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* that is to be credited to the routine which starts at svalue0.
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*
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* svalue0 svalue1
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* | |
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* v v
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*
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* +-----------------------------------------------+
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* | |
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* | ->| |<- ->| |<- ->| |<- |
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* | | | | | |
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* +---------+ +---------+ +---------+
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*
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* ^ ^ ^ ^ ^ ^
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* | | | | | |
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* pcl pch pcl pch pcl pch
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*
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* For the vax we assert that samples will never fall in the first
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* two bytes of any routine, since that is the entry mask,
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* thus we give call alignentries() to adjust the entry points if
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* the entry mask falls in one bucket but the code for the routine
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* doesn't start until the next bucket. In conjunction with the
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* alignment of routine addresses, this should allow us to have
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* only one sample for every four bytes of text space and never
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* have any overlap (the two end cases, above).
|
|
*/
|
|
asgnsamples()
|
|
{
|
|
register int j;
|
|
UNIT ccnt;
|
|
double time;
|
|
unsigned long pcl, pch;
|
|
register int i;
|
|
unsigned long overlap;
|
|
unsigned long svalue0, svalue1;
|
|
|
|
/* read samples and assign to namelist symbols */
|
|
scale = highpc - lowpc;
|
|
scale /= nsamples;
|
|
alignentries();
|
|
for (i = 0, j = 1; i < nsamples; i++) {
|
|
ccnt = samples[i];
|
|
if (ccnt == 0)
|
|
continue;
|
|
pcl = lowpc + scale * i;
|
|
pch = lowpc + scale * (i + 1);
|
|
time = ccnt;
|
|
# ifdef DEBUG
|
|
if ( debug & SAMPLEDEBUG ) {
|
|
printf( "[asgnsamples] pcl 0x%x pch 0x%x ccnt %d\n" ,
|
|
pcl , pch , ccnt );
|
|
}
|
|
# endif DEBUG
|
|
totime += time;
|
|
for (j = j - 1; j < nname; j++) {
|
|
svalue0 = nl[j].svalue;
|
|
svalue1 = nl[j+1].svalue;
|
|
/*
|
|
* if high end of tick is below entry address,
|
|
* go for next tick.
|
|
*/
|
|
if (pch < svalue0)
|
|
break;
|
|
/*
|
|
* if low end of tick into next routine,
|
|
* go for next routine.
|
|
*/
|
|
if (pcl >= svalue1)
|
|
continue;
|
|
overlap = min(pch, svalue1) - max(pcl, svalue0);
|
|
if (overlap > 0) {
|
|
# ifdef DEBUG
|
|
if (debug & SAMPLEDEBUG) {
|
|
printf("[asgnsamples] (0x%x->0x%x-0x%x) %s gets %f ticks %d overlap\n",
|
|
nl[j].value/sizeof(UNIT), svalue0, svalue1,
|
|
nl[j].name,
|
|
overlap * time / scale, overlap);
|
|
}
|
|
# endif DEBUG
|
|
nl[j].time += overlap * time / scale;
|
|
}
|
|
}
|
|
}
|
|
# ifdef DEBUG
|
|
if (debug & SAMPLEDEBUG) {
|
|
printf("[asgnsamples] totime %f\n", totime);
|
|
}
|
|
# endif DEBUG
|
|
}
|
|
|
|
|
|
unsigned long
|
|
min(a, b)
|
|
unsigned long a,b;
|
|
{
|
|
if (a<b)
|
|
return(a);
|
|
return(b);
|
|
}
|
|
|
|
unsigned long
|
|
max(a, b)
|
|
unsigned long a,b;
|
|
{
|
|
if (a>b)
|
|
return(a);
|
|
return(b);
|
|
}
|
|
|
|
/*
|
|
* calculate scaled entry point addresses (to save time in asgnsamples),
|
|
* and possibly push the scaled entry points over the entry mask,
|
|
* if it turns out that the entry point is in one bucket and the code
|
|
* for a routine is in the next bucket.
|
|
*/
|
|
alignentries()
|
|
{
|
|
register struct nl *nlp;
|
|
unsigned long bucket_of_entry;
|
|
unsigned long bucket_of_code;
|
|
|
|
for (nlp = nl; nlp < npe; nlp++) {
|
|
nlp -> svalue = nlp -> value / sizeof(UNIT);
|
|
bucket_of_entry = (nlp->svalue - lowpc) / scale;
|
|
bucket_of_code = (nlp->svalue + UNITS_TO_CODE - lowpc) / scale;
|
|
if (bucket_of_entry < bucket_of_code) {
|
|
# ifdef DEBUG
|
|
if (debug & SAMPLEDEBUG) {
|
|
printf("[alignentries] pushing svalue 0x%x to 0x%x\n",
|
|
nlp->svalue, nlp->svalue + UNITS_TO_CODE);
|
|
}
|
|
# endif DEBUG
|
|
nlp->svalue += UNITS_TO_CODE;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool
|
|
funcsymbol( symp )
|
|
asymbol *symp;
|
|
{
|
|
extern char *strtab; /* string table from a.out */
|
|
extern int aflag; /* if static functions aren't desired */
|
|
CONST char *name;
|
|
int i;
|
|
|
|
/*
|
|
* must be a text symbol,
|
|
* and static text symbols don't qualify if aflag set.
|
|
*/
|
|
|
|
|
|
if (!symp->section)
|
|
return FALSE;
|
|
|
|
if (!aflag && (symp->flags&BSF_LOCAL)) {
|
|
#if defined(DEBUG)
|
|
fprintf (stderr, "%s(%d): %s: not a function\n", __FILE__, __LINE__, symp->name);
|
|
#endif
|
|
return FALSE;
|
|
}
|
|
/*
|
|
* can't have any `funny' characters in name,
|
|
* where `funny' includes `.', .o file names
|
|
* and `$', pascal labels.
|
|
*/
|
|
if (!symp->name)
|
|
return FALSE;
|
|
|
|
for (name = symp->name; *name; name++) {
|
|
if ( *name == '.' || *name == '$' ) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
i = bfd_decode_symclass (symp);
|
|
#if defined(DEBUG) && 0
|
|
if (i != 'T' && i != 't')
|
|
fprintf (stderr, "%s(%d): %s is of class %c\n", __FILE__, __LINE__, symp->name, i);
|
|
#endif
|
|
|
|
return (i == 'T' || i == 't');
|
|
}
|
|
|
|
done()
|
|
{
|
|
|
|
exit(0);
|
|
}
|