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- /*
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that: (1) source distributions retain this entire copyright
- * notice and comment, and (2) distributions including binaries display
- * the following acknowledgement: ``This product includes software
- * developed by the University of California, Berkeley and its contributors''
- * in the documentation or other materials provided with the distribution
- * and in all advertising materials mentioning features or use of this
- * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #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 5.6 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- #include "gprof.h"
-
- bfd *abfd;
-
- char *whoami = "gprof";
-
- /*
- * things which get -E excluded by default.
- */
- char *defaultEs[] = { "mcount" , "__mcleanup" , 0 };
-
- int discard_underscores = 1; /* Should we discard initial underscores? */
- int bsd_style_output = 0; /* As opposed to FSF style output */
-
- 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':
- cflag = TRUE;
- 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 'T': /* "Traditional" output format */
- bsd_style_output = 1;
- break;
- case 'z':
- zflag = TRUE;
- break;
- default:
- fprintf (stderr, "usage: gprof [-a] [-b] [-c] [-d[num]] \
- [-E function-name] [-e function-name] \
- [-F function-name] [-f function-name] \
- [-k from to] [-s] [-T] [-z] [image-file] \
- [profile file(s)]\n");
- exit (1);
- }
- 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();
-
- if (bsd_style_output) {
- printgprof( timesortnlp ); /* print the dynamic profile */
- printprof(); /* print the flat profile */
- } else {
- printprof(); /* print the flat profile */
- printgprof( timesortnlp ); /* print the dynamic profile */
- }
- /*
- * 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()
- {
- int valcmp();
-
- abfd = bfd_openr (a_outname, NULL);
-
- if (abfd == NULL) {
- perror (a_outname);
- done();
- }
-
- if (!bfd_check_format (abfd, bfd_object)) {
- fprintf (stderr, "%s: %s: bad format\n", whoami, a_outname);
- done();
- }
-
- /* getstrtab(nfile); */
- getsymtab(abfd);
- gettextspace( abfd );
- qsort(nl, nname, sizeof(nltype), valcmp);
-
- # 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
- }
-
- /*
- * Read in symbol table
- */
- getsymtab(abfd)
- bfd *abfd;
- {
- register long i;
- int askfor;
- int nosyms;
- asymbol **syms;
- i = get_symtab_upper_bound (abfd); /* This will probably give us more
- * than we need, but that's ok.
- */
- syms = (asymbol**)xmalloc (i);
- nosyms = bfd_canonicalize_symtab (abfd, syms);
-
- nname = 0;
- for (i = 0; i < nosyms; i++) {
- if (!funcsymbol (syms[i]))
- 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 */
- npe = nl;
- nname = 0;
- for (i = 0; i < nosyms; i++) {
- if (!funcsymbol (syms[i])) {
- # ifdef DEBUG
- if ( debug & AOUTDEBUG ) {
- printf( "[getsymtab] rejecting: 0x%x %s\n" ,
- syms[i]->value, syms[i]->name);
- }
- # endif DEBUG
- continue;
- }
- /* Symbol offsets are always section-relative. */
- npe->value = syms[i]->value + syms[i]->section->vma;
- npe->name = syms[i]->name;
-
- /* If we see "main" without an initial '_', we assume
- names are *not* prefixed by '_'. */
- if (npe->name[0] == 'm' && discard_underscores
- && strcmp(npe->name, "main") == 0)
- discard_underscores = 0;
-
- # 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( abfd )
- bfd *abfd;
- {
- asection *texsec;
-
- if ( cflag == 0 ) {
- return;
- }
-
- texsec = bfd_get_section_by_name (abfd, ".text");
- if (texsec == NULL) {
- return;
- }
-
- textspace = (u_char *) malloc( texsec->_cooked_size );
-
- if ( textspace == 0 ) {
- fprintf( stderr , "%s: ran out room for %d bytes of text space: " ,
- whoami , texsec->_cooked_size);
- fprintf( stderr , "can't do -c\n" );
- return;
- }
- bfd_get_section_contents (abfd, texsec, textspace, texsec->filepos,
- texsec->_cooked_size);
- }
- /*
- * 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 ) {
- arc.raw_frompc = bfd_get_32 (abfd, (bfd_byte *) &arc.raw_frompc);
- arc.raw_selfpc = bfd_get_32 (abfd, (bfd_byte *) &arc.raw_selfpc);
- arc.raw_count = bfd_get_32 (abfd, (bfd_byte *) &arc.raw_count);
- # 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, "rb")) == NULL) {
- perror(filename);
- done();
- }
- fread(&tmp, sizeof(struct hdr), 1, pfile);
- tmp.lowpc = (UNIT *)bfd_get_32 (abfd, (bfd_byte *) &tmp.lowpc);
- tmp.highpc = (UNIT *)bfd_get_32 (abfd, (bfd_byte *) &tmp.highpc);
- tmp.ncnt = bfd_get_32 (abfd, (bfd_byte *) &tmp.ncnt);
-
- 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 *) malloc (sampbytes * sizeof(UNIT));
- if (samples == 0) {
- fprintf( stderr , "%s: No room for %d sample pc's\n",
- whoami , sampbytes / sizeof (UNIT));
- done();
- }
- memset (samples, 0, sampbytes * sizeof(UNIT));
- }
- for (i = 0; i < nsamples; i++) {
- fread(&sample, sizeof (UNIT), 1, pfile);
- sample = bfd_get_16 (abfd, (bfd_byte *) &sample);
- 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( 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;
- }
- }
-
- if (strncmp(symp->name, "___gnu_compiled", 15) == 0)
- 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);
- }
-