X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/06ac0fb1b79423d128f012c3a6f2cc2963e35d48..1f096eb2af98e1c908d9a84ed3e9c95b81d4751d:/usr/src/usr.bin/gprof/gprof.c

diff --git a/usr/src/usr.bin/gprof/gprof.c b/usr/src/usr.bin/gprof/gprof.c
index adceb86df9..3868583d0a 100644
--- a/usr/src/usr.bin/gprof/gprof.c
+++ b/usr/src/usr.bin/gprof/gprof.c
@@ -1,30 +1,74 @@
 #ifndef lint
-    static	char *sccsid = "@(#)gprof.c	1.4 (Berkeley) %G%";
+    static	char *sccsid = "@(#)gprof.c	1.18 (Berkeley) %G%";
 #endif lint
 
 #include "gprof.h"
 
+char	*whoami = "gprof";
+
+    /*
+     *	things which get -E excluded by default.
+     */
+char	*defaultEs[] = { "mcount" , "__mcleanup" , 0 };
+
 main(argc, argv)
-	int argc;
-	char **argv;
+    int argc;
+    char **argv;
 {
+    char	**sp;
 
     --argc;
     argv++;
     debug = 0;
     while ( *argv != 0 && **argv == '-' ) {
 	(*argv)++;
-	if ( **argv == 'd' ) {
+	switch ( **argv ) {
+	case 'a':
+	    aflag = TRUE;
+	    break;
+	case 'b':
+	    bflag = TRUE;
+	    break;
+	case 'c':
+	    cflag = TRUE;
+	    break;
+	case 'd':
+	    dflag = TRUE;
 	    (*argv)++;
 	    debug |= atoi( *argv );
 	    debug |= ANYDEBUG;
 #	    ifdef DEBUG
 		printf( "[main] debug = %d\n" , debug );
 #	    endif DEBUG
-	} else if ( **argv == 'z' ) {
-	    zflg++;
-	} else if ( **argv == 'c' ) {
-	    cflag++;
+	    break;
+	case 'E':
+	    ++argv;
+	    addlist( Elist , *argv );
+	    Eflag = TRUE;
+	    addlist( elist , *argv );
+	    eflag = TRUE;
+	    break;
+	case 'e':
+	    addlist( elist , *++argv );
+	    eflag = TRUE;
+	    break;
+	case 'F':
+	    ++argv;
+	    addlist( Flist , *argv );
+	    Fflag = TRUE;
+	    addlist( flist , *argv );
+	    fflag = TRUE;
+	    break;
+	case 'f':
+	    addlist( flist , *++argv );
+	    fflag = TRUE;
+	    break;
+	case 's':
+	    sflag = TRUE;
+	    break;
+	case 'z':
+	    zflag = TRUE;
+	    break;
 	}
 	argv++;
     }
@@ -39,6 +83,15 @@ main(argc, argv)
 	argv++;
     } else {
 	gmonname = GMONNAME;
+    }
+	/*
+	 *	turn off default functions
+	 */
+    for ( sp = &defaultEs[0] ; *sp ; sp++ ) {
+	Eflag = TRUE;
+	addlist( Elist , *sp );
+	eflag = TRUE;
+	addlist( elist , *sp );
     }
 	/*
 	 *	get information about a.out file.
@@ -47,7 +100,18 @@ main(argc, argv)
 	/*
 	 *	get information about mon.out file(s).
 	 */
-    getpfile( gmonname );
+    do	{
+	getpfile( gmonname );
+	if ( *argv != 0 ) {
+	    gmonname = *argv;
+	}
+    } while ( *argv++ != 0 );
+	/*
+	 *	dump out a gmon.sum file if requested
+	 */
+    if ( sflag ) {
+	dumpsum( GMONSUM );
+    }
 	/*
 	 *	assign samples to procedures
 	 */
@@ -63,11 +127,11 @@ main(argc, argv)
     done();
 }
 
-/*
- * Set up string and symbol tables from a.out.
- *	and optionally the text space.
- * On return symbol table is sorted by value.
- */
+    /*
+     * Set up string and symbol tables from a.out.
+     *	and optionally the text space.
+     * On return symbol table is sorted by value.
+     */
 getnfile()
 {
     FILE	*nfile;
@@ -79,7 +143,7 @@ getnfile()
     }
     fread(&xbuf, 1, sizeof(xbuf), nfile);
     if (N_BADMAG(xbuf)) {
-	fprintf(stderr, "%s: bad format\n", a_outname );
+	fprintf(stderr, "%s: %s: bad format\n", whoami , a_outname );
 	done();
     }
     getstrtab(nfile);
@@ -104,17 +168,19 @@ getstrtab(nfile)
 
     fseek(nfile, (long)(N_SYMOFF(xbuf) + xbuf.a_syms), 0);
     if (fread(&ssiz, sizeof (ssiz), 1, nfile) == 0) {
-	fprintf(stderr, "%s: no string table (old format?)\n", a_outname );
+	fprintf(stderr, "%s: %s: no string table (old format?)\n" ,
+		whoami , a_outname );
 	done();
     }
     strtab = (char *)calloc(ssiz, 1);
     if (strtab == NULL) {
-	fprintf(stderr, "%s: no room for %d bytes of string table",
-		a_outname , ssiz);
+	fprintf(stderr, "%s: %s: no room for %d bytes of string table",
+		whoami , a_outname , ssiz);
 	done();
     }
     if (fread(strtab+sizeof(ssiz), ssiz-sizeof(ssiz), 1, nfile) != 1) {
-	fprintf(stderr, "%s: error reading string table\n", a_outname );
+	fprintf(stderr, "%s: %s: error reading string table\n",
+		whoami , a_outname );
 	done();
     }
 }
@@ -134,27 +200,20 @@ getsymtab(nfile)
     nname = 0;
     for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) {
 	fread(&nbuf, sizeof(nbuf), 1, nfile);
-	if ( nbuf.n_type != N_TEXT+N_EXT ) {
+	if ( ! funcsymbol( &nbuf ) ) {
 	    continue;
 	}
 	nname++;
     }
     if (nname == 0) {
-	fprintf(stderr, "%s: no symbols\n", a_outname );
+	fprintf(stderr, "%s: %s: no symbols\n", whoami , a_outname );
 	done();
     }
-	/*
-	 *	ask also for CYCLEFRACTION extra namelist entries for 
-	 *	cycle entries.  these hide out at the end of the namelist
-	 *	and aren't accessed unless the whole namelist (nname+ncycles)
-	 *	is sorted and searched.
-	 */
-    ncycles = nname * CYCLEFRACTION;
-    askfor = nname + 1 + ncycles;
+    askfor = nname + 1;
     nl = (nltype *) calloc( askfor , sizeof(nltype) );
     if (nl == 0) {
-	fprintf(stderr, "prof: No room for %d bytes of symbol table\n",
-		askfor * sizeof(nltype) );
+	fprintf(stderr, "%s: No room for %d bytes of symbol table\n",
+		whoami, askfor * sizeof(nltype) );
 	done();
     }
 
@@ -164,7 +223,13 @@ getsymtab(nfile)
     nname = 0;
     for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) {
 	fread(&nbuf, sizeof(nbuf), 1, nfile);
-	if ( nbuf.n_type != N_TEXT+N_EXT ) {
+	if ( ! funcsymbol( &nbuf ) ) {
+#	    ifdef DEBUG
+		if ( debug & AOUTDEBUG ) {
+		    printf( "[getsymtab] rejecting: 0x%x %s\n" ,
+			    nbuf.n_type , strtab + nbuf.n_un.n_strx );
+		}
+#	    endif DEBUG
 	    continue;
 	}
 	npe->value = nbuf.n_value;
@@ -195,14 +260,15 @@ gettextspace( nfile )
     }
     textspace = malloc( xbuf.a_text );
     if ( textspace == 0 ) {
-	fprintf( stderr , "gprof: ran out room for %d bytes of text space:  " );
-	fprintf( stderr , "can't do -c\n" , xbuf.a_text );
+	fprintf( stderr , "%s: ran out room for %d bytes of text space:  " ,
+			whoami , xbuf.a_text );
+	fprintf( stderr , "can't do -c\n" );
 	return;
     }
     (void) fseek( nfile , N_TXTOFF( xbuf ) , 0 );
     if ( fread( textspace , 1 , xbuf.a_text , nfile ) != xbuf.a_text ) {
-	fprintf( stderr , "couldn't read text space:  " );
-	fprintf( stderr , "can't do -c\n" , xbuf.a_text );
+	fprintf( stderr , "%s: couldn't read text space:  " , whoami );
+	fprintf( stderr , "can't do -c\n" );
 	free( textspace );
 	textspace = 0;
 	return;
@@ -241,22 +307,42 @@ getpfile(filename)
     fclose(pfile);
 }
 
-FILE *openpfile(filename)
+FILE *
+openpfile(filename)
     char *filename;
 {
+    struct hdr	tmp;
     FILE	*pfile;
 
     if((pfile = fopen(filename, "r")) == NULL) {
 	perror(filename);
 	done();
     }
-    fread(&h, sizeof(struct hdr), 1, pfile);
+    fread(&tmp, sizeof(struct hdr), 1, pfile);
+    if ( s_highpc != 0 && ( tmp.lowpc != h.lowpc ||
+	 tmp.highpc != h.highpc || tmp.ncnt != h.ncnt ) ) {
+	fprintf(stderr, "%s: incompatible with first gmon file\n", filename);
+	done();
+    }
+    h = tmp;
     s_lowpc = (unsigned long) h.lowpc;
     s_highpc = (unsigned long) h.highpc;
-    lowpc = h.lowpc - (UNIT *)0;
-    highpc = h.highpc - (UNIT *)0;
+    lowpc = (unsigned long)h.lowpc / sizeof(UNIT);
+    highpc = (unsigned long)h.highpc / sizeof(UNIT);
     sampbytes = h.ncnt - sizeof(struct hdr);
     nsamples = sampbytes / sizeof (unsigned UNIT);
+#   ifdef DEBUG
+	if ( debug & SAMPLEDEBUG ) {
+	    printf( "[openpfile] hdr.lowpc 0x%x hdr.highpc 0x%x hdr.ncnt %d\n",
+		h.lowpc , h.highpc , h.ncnt );
+	    printf( "[openpfile]   s_lowpc 0x%x   s_highpc 0x%x\n" ,
+		s_lowpc , s_highpc );
+	    printf( "[openpfile]     lowpc 0x%x     highpc 0x%x\n" ,
+		lowpc , highpc );
+	    printf( "[openpfile] sampbytes %d nsamples %d\n" ,
+		sampbytes , nsamples );
+	}
+#   endif DEBUG
     return(pfile);
 }
 
@@ -278,6 +364,58 @@ tally( rawp )
     addarc( parentp , childp , rawp -> raw_count );
 }
 
+/*
+ * dump out the gmon.sum file
+ */
+dumpsum( sumfile )
+    char *sumfile;
+{
+    register nltype *nlp;
+    register arctype *arcp;
+    struct rawarc arc;
+    FILE *sfile;
+
+    if ( ( sfile = fopen ( sumfile , "w" ) ) == NULL ) {
+	perror( sumfile );
+	done();
+    }
+    /*
+     * dump the header; use the last header read in
+     */
+    if ( fwrite( &h , sizeof h , 1 , sfile ) != 1 ) {
+	perror( sumfile );
+	done();
+    }
+    /*
+     * dump the samples
+     */
+    if (fwrite(samples, sizeof(unsigned UNIT), nsamples, sfile) != nsamples) {
+	perror( sumfile );
+	done();
+    }
+    /*
+     * dump the normalized raw arc information
+     */
+    for ( nlp = nl ; nlp < npe - 1 ; nlp++ ) {
+	for ( arcp = nlp -> children ; arcp ; arcp = arcp -> arc_childlist ) {
+	    arc.raw_frompc = arcp -> arc_parentp -> value;
+	    arc.raw_selfpc = arcp -> arc_childp -> value;
+	    arc.raw_count = arcp -> arc_count;
+	    if ( fwrite ( &arc , sizeof arc , 1 , sfile ) != 1 ) {
+		perror( sumfile );
+		done();
+	    }
+#	    ifdef DEBUG
+		if ( debug & SAMPLEDEBUG ) {
+		    printf( "[dumpsum] frompc 0x%x selfpc 0x%x count %d\n" ,
+			    arc.raw_frompc , arc.raw_selfpc , arc.raw_count );
+		}
+#	    endif DEBUG
+	}
+    }
+    fclose( sfile );
+}
+
 valcmp(p1, p2)
     nltype *p1, *p2;
 {
@@ -299,8 +437,8 @@ readsamples(pfile)
     if (samples == 0) {
 	samples = (unsigned UNIT *) calloc(sampbytes, sizeof (unsigned UNIT));
 	if (samples == 0) {
-	    fprintf( stderr , "prof: No room for %d sample pc's\n", 
-		sampbytes / sizeof (unsigned UNIT));
+	    fprintf( stderr , "%s: No room for %d sample pc's\n", 
+		whoami , sampbytes / sizeof (unsigned UNIT));
 	    done();
 	}
     }
@@ -312,8 +450,8 @@ readsamples(pfile)
     }
     if (i != nsamples) {
 	fprintf(stderr,
-	    "prof: unexpected EOF after reading %d/%d samples\n",
-		--i, nsamples);
+	    "%s: unexpected EOF after reading %d/%d samples\n",
+		whoami , --i , nsamples );
 	done();
     }
 }
@@ -328,13 +466,13 @@ asgnsamples()
     double		time;
     unsigned long	pcl, pch;
     register int	i;
-    int			overlap;
+    unsigned long	overlap;
     unsigned long	svalue0, svalue1;
 
     /* read samples and assign to namelist symbols */
     scale = highpc - lowpc;
     scale /= nsamples;
-    for (i=0; i < nsamples; i++) {
+    for (i = 0, j = 1; i < nsamples; i++) {
 	ccnt = samples[i];
 	if (ccnt == 0)
 		continue;
@@ -343,12 +481,12 @@ asgnsamples()
 	time = ccnt;
 #	ifdef DEBUG
 	    if ( debug & SAMPLEDEBUG ) {
-		printf( "[asgnsamples] ccnt %d time %f totime %f\n" ,
-			ccnt , time , totime );
+		printf( "[asgnsamples] pcl 0x%x pch 0x%x ccnt %d\n" ,
+			pcl , pch , ccnt );
 	    }
 #	endif DEBUG
 	totime += time;
-	for (j=0; j<nname; j++) {
+	for (j = j - 1; j < nname; j++) {
 	    svalue0 = nl[j].value / sizeof(UNIT);
 	    svalue1 = nl[j+1].value / sizeof(UNIT);
 	    if (pch < svalue0)
@@ -359,8 +497,9 @@ asgnsamples()
 	    if (overlap>0) {
 #		ifdef DEBUG
 		    if ( debug & SAMPLEDEBUG ) {
-			printf( "[asgnsamples] %s gets %f ticks\n" ,
-				nl[j].name , overlap*time/scale );
+			printf( "[asgnsamples] (0x%x-0x%x) %s gets %f ticks\n" ,
+				svalue0 , svalue1 , nl[j].name , 
+				overlap*time/scale );
 		    }
 #		endif DEBUG
 		nl[j].time += overlap*time/scale;
@@ -372,29 +511,56 @@ asgnsamples()
 	    printf( "[asgnsamples] totime %f\n" , totime );
 	}
 #   endif DEBUG
-    if (totime==0.0) {
-	fprintf( stderr , "No time accumulated\n" );
-	totime=1.0;
-    }
 }
 
 
+unsigned long
 min(a, b)
-    unsigned a,b;
+    unsigned long a,b;
 {
     if (a<b)
 	return(a);
     return(b);
 }
 
+unsigned long
 max(a, b)
-    unsigned a,b;
+    unsigned long a,b;
 {
     if (a>b)
 	return(a);
     return(b);
 }
 
+bool
+funcsymbol( nlistp )
+    struct nlist	*nlistp;
+{
+    extern char	*strtab;	/* string table from a.out */
+    extern int	aflag;		/* if static functions aren't desired */
+    char	*name;
+
+	/*
+	 *	must be a text symbol,
+	 *	and static text symbols don't qualify if aflag set.
+	 */
+    if ( ! (  ( nlistp -> n_type == ( N_TEXT | N_EXT ) )
+	   || ( ( nlistp -> n_type == N_TEXT ) && ( aflag == 0 ) ) ) ) {
+	return FALSE;
+    }
+	/*
+	 *	can't have any `funny' characters in name,
+	 *	where `funny' includes	`.', .o file names
+	 *			and	`$', pascal labels.
+	 */
+    for ( name = strtab + nlistp -> n_un.n_strx ; *name ; name += 1 ) {
+	if ( *name == '.' || *name == '$' ) {
+	    return FALSE;
+	}
+    }
+    return TRUE;
+}
+
 done()
 {