2 * Copyright (c) 1983 Regents of the University of California.
5 * Redistribution and use in source and binary forms are permitted
6 * provided that: (1) source distributions retain this entire copyright
7 * notice and comment, and (2) distributions including binaries display
8 * the following acknowledgement: ``This product includes software
9 * developed by the University of California, Berkeley and its contributors''
10 * in the documentation or other materials provided with the distribution
11 * and in all advertising materials mentioning features or use of this
12 * software. Neither the name of the University nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 "@(#) Copyright (c) 1983 Regents of the University of California.\n\
23 All rights reserved.\n";
27 static char sccsid
[] = "@(#)gprof.c 5.6 (Berkeley) 6/1/90";
34 char *whoami
= "gprof";
37 * things which get -E excluded by default.
39 char *defaultEs
[] = { "mcount" , "__mcleanup" , 0 };
41 int discard_underscores
= 1; /* Should we discard initial underscores? */
42 int bsd_style_output
= 0; /* As opposed to FSF style output */
55 while ( *argv
!= 0 && **argv
== '-' ) {
70 debug
|= atoi( *argv
);
73 printf("[main] debug = %d\n", debug
);
75 printf("%s: -d ignored\n", whoami
);
80 addlist( Elist
, *argv
);
82 addlist( elist
, *argv
);
86 addlist( elist
, *++argv
);
91 addlist( Flist
, *argv
);
93 addlist( flist
, *argv
);
97 addlist( flist
, *++argv
);
101 addlist( kfromlist
, *++argv
);
102 addlist( ktolist
, *++argv
);
108 case 'T': /* "Traditional" output format */
109 bsd_style_output
= 1;
115 fprintf (stderr
, "usage: gprof [-a] [-b] [-c] [-d[num]] \
116 [-E function-name] [-e function-name] \
117 [-F function-name] [-f function-name] \
118 [-k from to] [-s] [-T] [-z] [image-file] \
119 [profile file(s)]\n");
128 a_outname
= A_OUTNAME
;
137 * turn off default functions
139 for ( sp
= &defaultEs
[0] ; *sp
; sp
++ ) {
141 addlist( Elist
, *sp
);
143 addlist( elist
, *sp
);
146 * how many ticks per second?
147 * if we can't tell, report time in ticks.
152 fprintf(stderr
, "time is in ticks, not seconds\n");
155 * get information about a.out file.
159 * get information about mon.out file(s).
162 getpfile( gmonname
);
166 } while ( *argv
++ != 0 );
168 * dump out a gmon.sum file if requested
174 * assign samples to procedures
178 * assemble the dynamic profile
180 timesortnlp
= doarcs();
182 if (bsd_style_output
) {
183 printgprof( timesortnlp
); /* print the dynamic profile */
184 printprof(); /* print the flat profile */
186 printprof(); /* print the flat profile */
187 printgprof( timesortnlp
); /* print the dynamic profile */
197 * Set up string and symbol tables from a.out.
198 * and optionally the text space.
199 * On return symbol table is sorted by value.
205 abfd
= bfd_openr (a_outname
, NULL
);
212 if (!bfd_check_format (abfd
, bfd_object
)) {
213 fprintf (stderr
, "%s: %s: bad format\n", whoami
, a_outname
);
217 /* getstrtab(nfile); */
219 gettextspace( abfd
);
220 qsort(nl
, nname
, sizeof(nltype
), valcmp
);
223 if ( debug
& AOUTDEBUG
) {
226 for (j
= 0; j
< nname
; j
++){
227 printf("[getnfile] 0X%08x\t%s\n", nl
[j
].value
, nl
[j
].name
);
234 * Read in symbol table
243 i
= get_symtab_upper_bound (abfd
); /* This will probably give us more
244 * than we need, but that's ok.
246 syms
= (asymbol
**)xmalloc (i
);
247 nosyms
= bfd_canonicalize_symtab (abfd
, syms
);
250 for (i
= 0; i
< nosyms
; i
++) {
251 if (!funcsymbol (syms
[i
]))
257 fprintf(stderr
, "%s: %s: no symbols\n", whoami
, a_outname
);
261 nl
= (nltype
*) calloc( askfor
, sizeof(nltype
) );
263 fprintf(stderr
, "%s: No room for %d bytes of symbol table\n",
264 whoami
, askfor
* sizeof(nltype
) );
268 /* pass2 - read symbols */
271 for (i
= 0; i
< nosyms
; i
++) {
272 if (!funcsymbol (syms
[i
])) {
274 if ( debug
& AOUTDEBUG
) {
275 printf( "[getsymtab] rejecting: 0x%x %s\n" ,
276 syms
[i
]->value
, syms
[i
]->name
);
281 /* Symbol offsets are always section-relative. */
282 npe
->value
= syms
[i
]->value
+ syms
[i
]->section
->vma
;
283 npe
->name
= syms
[i
]->name
;
285 /* If we see "main" without an initial '_', we assume
286 names are *not* prefixed by '_'. */
287 if (npe
->name
[0] == 'm' && discard_underscores
288 && strcmp(npe
->name
, "main") == 0)
289 discard_underscores
= 0;
292 if ( debug
& AOUTDEBUG
) {
293 printf( "[getsymtab] %d %s 0x%08x\n" ,
294 nname
, npe
-> name
, npe
-> value
);
304 * read in the text space of an a.out file
315 texsec
= bfd_get_section_by_name (abfd
, ".text");
316 if (texsec
== NULL
) {
320 textspace
= (u_char
*) malloc( texsec
->_cooked_size
);
322 if ( textspace
== 0 ) {
323 fprintf( stderr
, "%s: ran out room for %d bytes of text space: " ,
324 whoami
, texsec
->_cooked_size
);
325 fprintf( stderr
, "can't do -c\n" );
328 bfd_get_section_contents (abfd
, texsec
, textspace
, texsec
->filepos
,
329 texsec
->_cooked_size
);
332 * information from a gmon.out file is in two parts:
333 * an array of sampling hits within pc ranges,
343 pfile
= openpfile(filename
);
346 * the rest of the file consists of
347 * a bunch of <from,self,count> tuples.
349 while ( fread( &arc
, sizeof arc
, 1 , pfile
) == 1 ) {
350 arc
.raw_frompc
= bfd_get_32 (abfd
, (bfd_byte
*) &arc
.raw_frompc
);
351 arc
.raw_selfpc
= bfd_get_32 (abfd
, (bfd_byte
*) &arc
.raw_selfpc
);
352 arc
.raw_count
= bfd_get_32 (abfd
, (bfd_byte
*) &arc
.raw_count
);
354 if ( debug
& SAMPLEDEBUG
) {
355 printf( "[getpfile] frompc 0x%x selfpc 0x%x count %d\n" ,
356 arc
.raw_frompc
, arc
.raw_selfpc
, arc
.raw_count
);
374 if((pfile
= fopen(filename
, "r")) == NULL
) {
378 fread(&tmp
, sizeof(struct hdr
), 1, pfile
);
379 tmp
.lowpc
= (UNIT
*)bfd_get_32 (abfd
, (bfd_byte
*) &tmp
.lowpc
);
380 tmp
.highpc
= (UNIT
*)bfd_get_32 (abfd
, (bfd_byte
*) &tmp
.highpc
);
381 tmp
.ncnt
= bfd_get_32 (abfd
, (bfd_byte
*) &tmp
.ncnt
);
383 if ( s_highpc
!= 0 && ( tmp
.lowpc
!= h
.lowpc
||
384 tmp
.highpc
!= h
.highpc
|| tmp
.ncnt
!= h
.ncnt
) ) {
385 fprintf(stderr
, "%s: incompatible with first gmon file\n", filename
);
389 s_lowpc
= (unsigned long) h
.lowpc
;
390 s_highpc
= (unsigned long) h
.highpc
;
391 lowpc
= (unsigned long)h
.lowpc
/ sizeof(UNIT
);
392 highpc
= (unsigned long)h
.highpc
/ sizeof(UNIT
);
393 sampbytes
= h
.ncnt
- sizeof(struct hdr
);
394 nsamples
= sampbytes
/ sizeof (UNIT
);
396 if ( debug
& SAMPLEDEBUG
) {
397 printf( "[openpfile] hdr.lowpc 0x%x hdr.highpc 0x%x hdr.ncnt %d\n",
398 h
.lowpc
, h
.highpc
, h
.ncnt
);
399 printf( "[openpfile] s_lowpc 0x%x s_highpc 0x%x\n" ,
400 s_lowpc
, s_highpc
);
401 printf( "[openpfile] lowpc 0x%x highpc 0x%x\n" ,
403 printf( "[openpfile] sampbytes %d nsamples %d\n" ,
404 sampbytes
, nsamples
);
416 parentp
= nllookup( rawp
-> raw_frompc
);
417 childp
= nllookup( rawp
-> raw_selfpc
);
419 && onlist( kfromlist
, parentp
-> name
)
420 && onlist( ktolist
, childp
-> name
) ) {
423 childp
-> ncall
+= rawp
-> raw_count
;
425 if ( debug
& TALLYDEBUG
) {
426 printf( "[tally] arc from %s to %s traversed %d times\n" ,
427 parentp
-> name
, childp
-> name
, rawp
-> raw_count
);
430 addarc( parentp
, childp
, rawp
-> raw_count
);
434 * dump out the gmon.sum file
439 register nltype
*nlp
;
440 register arctype
*arcp
;
444 if ( ( sfile
= fopen ( sumfile
, "w" ) ) == NULL
) {
449 * dump the header; use the last header read in
451 if ( fwrite( &h
, sizeof h
, 1 , sfile
) != 1 ) {
458 if (fwrite(samples
, sizeof (UNIT
), nsamples
, sfile
) != nsamples
) {
463 * dump the normalized raw arc information
465 for ( nlp
= nl
; nlp
< npe
; nlp
++ ) {
466 for ( arcp
= nlp
-> children
; arcp
; arcp
= arcp
-> arc_childlist
) {
467 arc
.raw_frompc
= arcp
-> arc_parentp
-> value
;
468 arc
.raw_selfpc
= arcp
-> arc_childp
-> value
;
469 arc
.raw_count
= arcp
-> arc_count
;
470 if ( fwrite ( &arc
, sizeof arc
, 1 , sfile
) != 1 ) {
475 if ( debug
& SAMPLEDEBUG
) {
476 printf( "[dumpsum] frompc 0x%x selfpc 0x%x count %d\n" ,
477 arc
.raw_frompc
, arc
.raw_selfpc
, arc
.raw_count
);
488 if ( p1
-> value
< p2
-> value
) {
491 if ( p1
-> value
> p2
-> value
) {
504 samples
= (UNIT
*) malloc (sampbytes
* sizeof(UNIT
));
506 fprintf( stderr
, "%s: No room for %d sample pc's\n",
507 whoami
, sampbytes
/ sizeof (UNIT
));
510 memset (samples
, 0, sampbytes
* sizeof(UNIT
));
512 for (i
= 0; i
< nsamples
; i
++) {
513 fread(&sample
, sizeof (UNIT
), 1, pfile
);
514 sample
= bfd_get_16 (abfd
, (bfd_byte
*) &sample
);
517 samples
[i
] += sample
;
521 "%s: unexpected EOF after reading %d/%d samples\n",
522 whoami
, --i
, nsamples
);
528 * Assign samples to the procedures to which they belong.
530 * There are three cases as to where pcl and pch can be
531 * with respect to the routine entry addresses svalue0 and svalue1
532 * as shown in the following diagram. overlap computes the
533 * distance between the arrows, the fraction of the sample
534 * that is to be credited to the routine which starts at svalue0.
540 * +-----------------------------------------------+
542 * | ->| |<- ->| |<- ->| |<- |
544 * +---------+ +---------+ +---------+
548 * pcl pch pcl pch pcl pch
550 * For the vax we assert that samples will never fall in the first
551 * two bytes of any routine, since that is the entry mask,
552 * thus we give call alignentries() to adjust the entry points if
553 * the entry mask falls in one bucket but the code for the routine
554 * doesn't start until the next bucket. In conjunction with the
555 * alignment of routine addresses, this should allow us to have
556 * only one sample for every four bytes of text space and never
557 * have any overlap (the two end cases, above).
564 unsigned long pcl
, pch
;
566 unsigned long overlap
;
567 unsigned long svalue0
, svalue1
;
569 /* read samples and assign to namelist symbols */
570 scale
= highpc
- lowpc
;
573 for (i
= 0, j
= 1; i
< nsamples
; i
++) {
577 pcl
= lowpc
+ scale
* i
;
578 pch
= lowpc
+ scale
* (i
+ 1);
581 if ( debug
& SAMPLEDEBUG
) {
582 printf( "[asgnsamples] pcl 0x%x pch 0x%x ccnt %d\n" ,
587 for (j
= j
- 1; j
< nname
; j
++) {
588 svalue0
= nl
[j
].svalue
;
589 svalue1
= nl
[j
+1].svalue
;
591 * if high end of tick is below entry address,
597 * if low end of tick into next routine,
598 * go for next routine.
602 overlap
= min(pch
, svalue1
) - max(pcl
, svalue0
);
605 if (debug
& SAMPLEDEBUG
) {
606 printf("[asgnsamples] (0x%x->0x%x-0x%x) %s gets %f ticks %d overlap\n",
607 nl
[j
].value
/sizeof(UNIT
), svalue0
, svalue1
,
609 overlap
* time
/ scale
, overlap
);
612 nl
[j
].time
+= overlap
* time
/ scale
;
617 if (debug
& SAMPLEDEBUG
) {
618 printf("[asgnsamples] totime %f\n", totime
);
643 * calculate scaled entry point addresses (to save time in asgnsamples),
644 * and possibly push the scaled entry points over the entry mask,
645 * if it turns out that the entry point is in one bucket and the code
646 * for a routine is in the next bucket.
650 register struct nl
*nlp
;
651 unsigned long bucket_of_entry
;
652 unsigned long bucket_of_code
;
654 for (nlp
= nl
; nlp
< npe
; nlp
++) {
655 nlp
-> svalue
= nlp
-> value
/ sizeof(UNIT
);
656 bucket_of_entry
= (nlp
->svalue
- lowpc
) / scale
;
657 bucket_of_code
= (nlp
->svalue
+ UNITS_TO_CODE
- lowpc
) / scale
;
658 if (bucket_of_entry
< bucket_of_code
) {
660 if (debug
& SAMPLEDEBUG
) {
661 printf("[alignentries] pushing svalue 0x%x to 0x%x\n",
662 nlp
->svalue
, nlp
->svalue
+ UNITS_TO_CODE
);
665 nlp
->svalue
+= UNITS_TO_CODE
;
674 extern char *strtab
; /* string table from a.out */
675 extern int aflag
; /* if static functions aren't desired */
680 * must be a text symbol,
681 * and static text symbols don't qualify if aflag set.
688 if (aflag
&& (symp
->flags
&BSF_LOCAL
)) {
690 fprintf (stderr
, "%s(%d): %s: not a function\n", __FILE__
, __LINE__
, symp
->name
);
695 * can't have any `funny' characters in name,
696 * where `funny' includes `.', .o file names
697 * and `$', pascal labels.
702 for (name
= symp
->name
; *name
; name
++) {
703 if ( *name
== '.' || *name
== '$' ) {
708 i
= bfd_decode_symclass (symp
);
709 #if defined(DEBUG) && 0
710 if (i
!= 'T' && i
!= 't')
711 fprintf (stderr
, "%s(%d): %s is of class %c\n", __FILE__
, __LINE__
, symp
->name
, i
);
714 return (i
== 'T' || i
== 't');
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