home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1983 Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)gprof.c 5.7 (Berkeley) 4/24/91";
- #endif /* not 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;
- {
- char **sp;
- nltype **timesortnlp;
-
- --argc;
- argv++;
- debug = 0;
- bflag = TRUE;
- while ( *argv != 0 && **argv == '-' ) {
- (*argv)++;
- switch ( **argv ) {
- case 'a':
- aflag = TRUE;
- break;
- case 'b':
- bflag = FALSE;
- break;
- case 'c':
- #if defined(vax) || defined(tahoe)
- cflag = TRUE;
- #else
- fprintf(stderr, "gprof: -c isn't supported on this architecture yet\n");
- exit(1);
- #endif
- break;
- case 'd':
- dflag = TRUE;
- (*argv)++;
- debug |= atoi( *argv );
- debug |= ANYDEBUG;
- # ifdef DEBUG
- printf("[main] debug = %d\n", debug);
- # else not DEBUG
- printf("%s: -d ignored\n", whoami);
- # endif DEBUG
- 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 'k':
- addlist( kfromlist , *++argv );
- addlist( ktolist , *++argv );
- kflag = TRUE;
- break;
- case 's':
- sflag = TRUE;
- break;
- case 'z':
- zflag = TRUE;
- break;
- }
- argv++;
- }
- if ( *argv != 0 ) {
- a_outname = *argv;
- argv++;
- } else {
- a_outname = A_OUTNAME;
- }
- if ( *argv != 0 ) {
- gmonname = *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 );
- }
- /*
- * how many ticks per second?
- * if we can't tell, report time in ticks.
- */
- hz = hertz();
- if (hz == 0) {
- hz = 1;
- fprintf(stderr, "time is in ticks, not seconds\n");
- }
- /*
- * get information about a.out file.
- */
- getnfile();
- /*
- * get information about mon.out file(s).
- */
- 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
- */
- asgnsamples();
- /*
- * assemble the dynamic profile
- */
- timesortnlp = doarcs();
- /*
- * print the dynamic profile
- */
- printgprof( timesortnlp );
- /*
- * print the flat profile
- */
- printprof();
- /*
- * print the index
- */
- printindex();
- done();
- }
-
- /*
- * 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;
- int valcmp();
-
- nfile = fopen( a_outname ,"r");
- if (nfile == NULL) {
- perror( a_outname );
- done();
- }
- fread(&xbuf, 1, sizeof(xbuf), nfile);
- if (N_BADMAG(xbuf)) {
- fprintf(stderr, "%s: %s: bad format\n", whoami , a_outname );
- done();
- }
- getstrtab(nfile);
- getsymtab(nfile);
- gettextspace( nfile );
- qsort(nl, nname, sizeof(nltype), valcmp);
- fclose(nfile);
- # ifdef DEBUG
- if ( debug & AOUTDEBUG ) {
- register int j;
-
- for (j = 0; j < nname; j++){
- printf("[getnfile] 0X%08x\t%s\n", nl[j].value, nl[j].name);
- }
- }
- # endif DEBUG
- }
-
- getstrtab(nfile)
- FILE *nfile;
- {
-
- fseek(nfile, (long)(N_SYMOFF(xbuf) + xbuf.a_syms), 0);
- if (fread(&ssiz, sizeof (ssiz), 1, nfile) == 0) {
- 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: %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: %s: error reading string table\n",
- whoami , a_outname );
- done();
- }
- }
-
- /*
- * Read in symbol table
- */
- getsymtab(nfile)
- FILE *nfile;
- {
- register long i;
- int askfor;
- struct nlist nbuf;
-
- /* pass1 - count symbols */
- fseek(nfile, (long)N_SYMOFF(xbuf), 0);
- nname = 0;
- for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) {
- fread(&nbuf, sizeof(nbuf), 1, nfile);
- if ( ! funcsymbol( &nbuf ) ) {
- continue;
- }
- nname++;
- }
- if (nname == 0) {
- fprintf(stderr, "%s: %s: no symbols\n", whoami , a_outname );
- done();
- }
- askfor = nname + 1;
- nl = (nltype *) calloc( askfor , sizeof(nltype) );
- if (nl == 0) {
- fprintf(stderr, "%s: No room for %d bytes of symbol table\n",
- whoami, askfor * sizeof(nltype) );
- done();
- }
-
- /* pass2 - read symbols */
- fseek(nfile, (long)N_SYMOFF(xbuf), 0);
- npe = nl;
- nname = 0;
- for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) {
- fread(&nbuf, sizeof(nbuf), 1, nfile);
- 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;
- npe->name = strtab+nbuf.n_un.n_strx;
- # ifdef DEBUG
- if ( debug & AOUTDEBUG ) {
- printf( "[getsymtab] %d %s 0x%08x\n" ,
- nname , npe -> name , npe -> value );
- }
- # endif DEBUG
- npe++;
- nname++;
- }
- npe->value = -1;
- }
-
- /*
- * read in the text space of an a.out file
- */
- gettextspace( nfile )
- FILE *nfile;
- {
- char *malloc();
-
- if ( cflag == 0 ) {
- return;
- }
- textspace = (u_char *) malloc( xbuf.a_text );
- if ( textspace == 0 ) {
- 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 , "%s: couldn't read text space: " , whoami );
- fprintf( stderr , "can't do -c\n" );
- free( textspace );
- textspace = 0;
- return;
- }
- }
- /*
- * information from a gmon.out file is in two parts:
- * an array of sampling hits within pc ranges,
- * and the arcs.
- */
- getpfile(filename)
- char *filename;
- {
- FILE *pfile;
- FILE *openpfile();
- struct rawarc arc;
-
- pfile = openpfile(filename);
- readsamples(pfile);
- /*
- * the rest of the file consists of
- * a bunch of <from,self,count> tuples.
- */
- while ( fread( &arc , sizeof arc , 1 , pfile ) == 1 ) {
- # ifdef DEBUG
- if ( debug & SAMPLEDEBUG ) {
- printf( "[getpfile] frompc 0x%x selfpc 0x%x count %d\n" ,
- arc.raw_frompc , arc.raw_selfpc , arc.raw_count );
- }
- # endif DEBUG
- /*
- * add this arc
- */
- tally( &arc );
- }
- fclose(pfile);
- }
-
- FILE *
- openpfile(filename)
- char *filename;
- {
- struct hdr tmp;
- FILE *pfile;
-
- if((pfile = fopen(filename, "r")) == NULL) {
- perror(filename);
- done();
- }
- 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 = (unsigned long)h.lowpc / sizeof(UNIT);
- highpc = (unsigned long)h.highpc / sizeof(UNIT);
- sampbytes = h.ncnt - sizeof(struct hdr);
- nsamples = sampbytes / sizeof (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);
- }
-
- tally( rawp )
- struct rawarc *rawp;
- {
- nltype *parentp;
- nltype *childp;
-
- parentp = nllookup( rawp -> raw_frompc );
- childp = nllookup( rawp -> raw_selfpc );
- if ( kflag
- && onlist( kfromlist , parentp -> name )
- && onlist( ktolist , childp -> name ) ) {
- return;
- }
- childp -> ncall += rawp -> raw_count;
- # ifdef DEBUG
- if ( debug & TALLYDEBUG ) {
- printf( "[tally] arc from %s to %s traversed %d times\n" ,
- parentp -> name , childp -> name , rawp -> raw_count );
- }
- # endif DEBUG
- 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 (UNIT), nsamples, sfile) != nsamples) {
- perror( sumfile );
- done();
- }
- /*
- * dump the normalized raw arc information
- */
- for ( nlp = nl ; nlp < npe ; 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;
- {
- if ( p1 -> value < p2 -> value ) {
- return LESSTHAN;
- }
- if ( p1 -> value > p2 -> value ) {
- return GREATERTHAN;
- }
- return EQUALTO;
- }
-
- readsamples(pfile)
- FILE *pfile;
- {
- register i;
- UNIT sample;
-
- if (samples == 0) {
- samples = (UNIT *) calloc(sampbytes, sizeof (UNIT));
- if (samples == 0) {
- fprintf( stderr , "%s: No room for %d sample pc's\n",
- whoami , sampbytes / sizeof (UNIT));
- done();
- }
- }
- for (i = 0; i < nsamples; i++) {
- fread(&sample, sizeof (UNIT), 1, pfile);
- if (feof(pfile))
- break;
- samples[i] += sample;
- }
- if (i != nsamples) {
- fprintf(stderr,
- "%s: unexpected EOF after reading %d/%d samples\n",
- whoami , --i , nsamples );
- done();
- }
- }
-
- /*
- * Assign samples to the procedures to which they belong.
- *
- * There are three cases as to where pcl and pch can be
- * with respect to the routine entry addresses svalue0 and svalue1
- * as shown in the following diagram. overlap computes the
- * distance between the arrows, the fraction of the sample
- * that is to be credited to the routine which starts at svalue0.
- *
- * svalue0 svalue1
- * | |
- * v v
- *
- * +-----------------------------------------------+
- * | |
- * | ->| |<- ->| |<- ->| |<- |
- * | | | | | |
- * +---------+ +---------+ +---------+
- *
- * ^ ^ ^ ^ ^ ^
- * | | | | | |
- * pcl pch pcl pch pcl pch
- *
- * For the vax we assert that samples will never fall in the first
- * two bytes of any routine, since that is the entry mask,
- * thus we give call alignentries() to adjust the entry points if
- * the entry mask falls in one bucket but the code for the routine
- * doesn't start until the next bucket. In conjunction with the
- * alignment of routine addresses, this should allow us to have
- * only one sample for every four bytes of text space and never
- * 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( 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()
- {
-
- exit(0);
- }
-