1 /* gmon_io.c - Input and output from/to gmon.out files.
3 Copyright (C) 1999-2015 Free Software Foundation, Inc.
5 This file is part of GNU Binutils.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
23 #include "binary-io.h"
24 #include "search_list.h"
28 #include "basic_blocks.h"
30 #include "call_graph.h"
33 #include "gmon.h" /* Fetch header for old format. */
36 #include "libiberty.h"
43 enum gmon_ptr_signedness {
48 static enum gmon_ptr_size gmon_get_ptr_size (void);
49 static enum gmon_ptr_signedness gmon_get_ptr_signedness (void);
51 #ifdef BFD_HOST_U_64_BIT
52 static int gmon_io_read_64 (FILE *, BFD_HOST_U_64_BIT *);
53 static int gmon_io_write_64 (FILE *, BFD_HOST_U_64_BIT);
55 static int gmon_read_raw_arc
56 (FILE *, bfd_vma *, bfd_vma *, unsigned long *);
57 static int gmon_write_raw_arc
58 (FILE *, bfd_vma, bfd_vma, unsigned long);
61 int gmon_file_version = 0; /* 0 == old (non-versioned) file format. */
63 static enum gmon_ptr_size
68 /* Pick best size for pointers. Start with the ELF size, and if not
69 elf go with the architecture's address size. */
70 size = bfd_get_arch_size (core_bfd);
72 size = bfd_arch_bits_per_address (core_bfd);
83 fprintf (stderr, _("%s: address size has unexpected value of %u\n"),
89 static enum gmon_ptr_signedness
90 gmon_get_ptr_signedness ()
94 /* Figure out whether to sign extend. If BFD doesn't know, assume no. */
95 sext = bfd_get_sign_extend_vma (core_bfd);
98 return (sext ? ptr_signed : ptr_unsigned);
102 gmon_io_read_32 (FILE *ifp, unsigned int *valp)
106 if (fread (buf, 1, 4, ifp) != 4)
108 *valp = bfd_get_32 (core_bfd, buf);
112 #ifdef BFD_HOST_U_64_BIT
114 gmon_io_read_64 (FILE *ifp, BFD_HOST_U_64_BIT *valp)
118 if (fread (buf, 1, 8, ifp) != 8)
120 *valp = bfd_get_64 (core_bfd, buf);
126 gmon_io_read_vma (FILE *ifp, bfd_vma *valp)
129 #ifdef BFD_HOST_U_64_BIT
130 BFD_HOST_U_64_BIT val64;
133 switch (gmon_get_ptr_size ())
136 if (gmon_io_read_32 (ifp, &val32))
138 if (gmon_get_ptr_signedness () == ptr_signed)
144 #ifdef BFD_HOST_U_64_BIT
146 if (gmon_io_read_64 (ifp, &val64))
148 #ifdef BFD_HOST_64_BIT
149 if (gmon_get_ptr_signedness () == ptr_signed)
150 *valp = (BFD_HOST_64_BIT) val64;
161 gmon_io_read (FILE *ifp, char *buf, size_t n)
163 if (fread (buf, 1, n, ifp) != n)
169 gmon_io_write_32 (FILE *ofp, unsigned int val)
173 bfd_put_32 (core_bfd, (bfd_vma) val, buf);
174 if (fwrite (buf, 1, 4, ofp) != 4)
179 #ifdef BFD_HOST_U_64_BIT
181 gmon_io_write_64 (FILE *ofp, BFD_HOST_U_64_BIT val)
185 bfd_put_64 (core_bfd, (bfd_vma) val, buf);
186 if (fwrite (buf, 1, 8, ofp) != 8)
193 gmon_io_write_vma (FILE *ofp, bfd_vma val)
196 switch (gmon_get_ptr_size ())
199 if (gmon_io_write_32 (ofp, (unsigned int) val))
203 #ifdef BFD_HOST_U_64_BIT
205 if (gmon_io_write_64 (ofp, (BFD_HOST_U_64_BIT) val))
214 gmon_io_write_8 (FILE *ofp, unsigned int val)
218 bfd_put_8 (core_bfd, val, buf);
219 if (fwrite (buf, 1, 1, ofp) != 1)
225 gmon_io_write (FILE *ofp, char *buf, size_t n)
227 if (fwrite (buf, 1, n, ofp) != n)
233 gmon_read_raw_arc (FILE *ifp, bfd_vma *fpc, bfd_vma *spc, unsigned long *cnt)
235 #ifdef BFD_HOST_U_64_BIT
236 BFD_HOST_U_64_BIT cnt64;
240 if (gmon_io_read_vma (ifp, fpc)
241 || gmon_io_read_vma (ifp, spc))
244 switch (gmon_get_ptr_size ())
247 if (gmon_io_read_32 (ifp, &cnt32))
252 #ifdef BFD_HOST_U_64_BIT
254 if (gmon_io_read_64 (ifp, &cnt64))
267 gmon_write_raw_arc (FILE *ofp, bfd_vma fpc, bfd_vma spc, unsigned long cnt)
270 if (gmon_io_write_vma (ofp, fpc)
271 || gmon_io_write_vma (ofp, spc))
274 switch (gmon_get_ptr_size ())
277 if (gmon_io_write_32 (ofp, (unsigned int) cnt))
281 #ifdef BFD_HOST_U_64_BIT
283 if (gmon_io_write_64 (ofp, (BFD_HOST_U_64_BIT) cnt))
292 gmon_out_read (const char *filename)
295 struct gmon_hdr ghdr;
297 int nhist = 0, narcs = 0, nbbs = 0;
299 /* Open gmon.out file. */
300 if (strcmp (filename, "-") == 0)
303 SET_BINARY (fileno (stdin));
307 ifp = fopen (filename, FOPEN_RB);
316 if (fread (&ghdr, sizeof (struct gmon_hdr), 1, ifp) != 1)
318 fprintf (stderr, _("%s: file too short to be a gmon file\n"),
323 if ((file_format == FF_MAGIC)
324 || (file_format == FF_AUTO && !strncmp (&ghdr.cookie[0], GMON_MAGIC, 4)))
326 if (file_format == FF_MAGIC && strncmp (&ghdr.cookie[0], GMON_MAGIC, 4))
328 fprintf (stderr, _("%s: file `%s' has bad magic cookie\n"),
333 /* Right magic, so it's probably really a new gmon.out file. */
334 gmon_file_version = bfd_get_32 (core_bfd, (bfd_byte *) ghdr.version);
336 if (gmon_file_version != GMON_VERSION && gmon_file_version != 0)
339 _("%s: file `%s' has unsupported version %d\n"),
340 whoami, filename, gmon_file_version);
344 /* Read in all the records. */
345 while (fread (&tag, sizeof (tag), 1, ifp) == 1)
349 case GMON_TAG_TIME_HIST:
351 gmon_input |= INPUT_HISTOGRAM;
352 hist_read_rec (ifp, filename);
355 case GMON_TAG_CG_ARC:
357 gmon_input |= INPUT_CALL_GRAPH;
358 cg_read_rec (ifp, filename);
361 case GMON_TAG_BB_COUNT:
363 gmon_input |= INPUT_BB_COUNTS;
364 bb_read_rec (ifp, filename);
369 _("%s: %s: found bad tag %d (file corrupted?)\n"),
370 whoami, filename, tag);
375 else if (file_format == FF_AUTO
376 || file_format == FF_BSD
377 || file_format == FF_BSD44)
386 int samp_bytes, header_size = 0;
388 bfd_vma from_pc, self_pc;
391 unsigned int version;
392 unsigned int hist_num_bins;
394 /* Information from a gmon.out file is in two parts: an array of
395 sampling hits within pc ranges, and the arcs. */
396 gmon_input = INPUT_HISTOGRAM | INPUT_CALL_GRAPH;
398 /* This fseek() ought to work even on stdin as long as it's
399 not an interactive device (heck, is there anybody who would
400 want to type in a gmon.out at the terminal?). */
401 if (fseek (ifp, 0, SEEK_SET) < 0)
407 /* The beginning of the old BSD header and the 4.4BSD header
408 are the same: lowpc, highpc, ncnt */
409 if (gmon_io_read_vma (ifp, &tmp.low_pc)
410 || gmon_io_read_vma (ifp, &tmp.high_pc)
411 || gmon_io_read_32 (ifp, &tmp.ncnt))
414 fprintf (stderr, _("%s: file too short to be a gmon file\n"),
419 /* Check to see if this a 4.4BSD-style header. */
420 if (gmon_io_read_32 (ifp, &version))
423 if (version == GMONVERSION)
425 unsigned int profrate;
427 /* 4.4BSD format header. */
428 if (gmon_io_read_32 (ifp, &profrate))
433 else if (hz != (int) profrate)
436 _("%s: profiling rate incompatible with first gmon file\n"),
441 switch (gmon_get_ptr_size ())
444 header_size = GMON_HDRSIZE_BSD44_32;
448 header_size = GMON_HDRSIZE_BSD44_64;
454 /* Old style BSD format. */
455 if (file_format == FF_BSD44)
457 fprintf (stderr, _("%s: file `%s' has bad magic cookie\n"),
462 switch (gmon_get_ptr_size ())
465 header_size = GMON_HDRSIZE_OLDBSD_32;
469 header_size = GMON_HDRSIZE_OLDBSD_64;
474 /* Position the file to after the header. */
475 if (fseek (ifp, header_size, SEEK_SET) < 0)
481 samp_bytes = tmp.ncnt - header_size;
482 hist_num_bins = samp_bytes / sizeof (UNIT);
483 if (histograms && (tmp.low_pc != histograms->lowpc
484 || tmp.high_pc != histograms->highpc
485 || (hist_num_bins != histograms->num_bins)))
487 fprintf (stderr, _("%s: incompatible with first gmon file\n"),
495 histograms = (struct histogram *) xmalloc (sizeof (struct histogram));
496 histograms->lowpc = tmp.low_pc;
497 histograms->highpc = tmp.high_pc;
498 histograms->num_bins = hist_num_bins;
499 hist_scale = (double)((tmp.high_pc - tmp.low_pc) / sizeof (UNIT))
501 histograms->sample = (int *) xmalloc (hist_num_bins * sizeof (int));
502 memset (histograms->sample, 0,
503 hist_num_bins * sizeof (int));
507 printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx ncnt %d\n",
508 (unsigned long) tmp.low_pc, (unsigned long) tmp.high_pc,
510 printf ("[gmon_out_read] samp_bytes %d hist_num_bins %d\n",
511 samp_bytes, hist_num_bins));
513 /* Make sure that we have sensible values. */
514 if (samp_bytes < 0 || histograms->lowpc > histograms->highpc)
517 _("%s: file '%s' does not appear to be in gmon.out format\n"),
525 for (i = 0; i < hist_num_bins; ++i)
527 if (fread (raw_bin_count, sizeof (raw_bin_count), 1, ifp) != 1)
530 _("%s: unexpected EOF after reading %d/%d bins\n"),
531 whoami, --i, hist_num_bins);
535 histograms->sample[i]
536 += bfd_get_16 (core_bfd, (bfd_byte *) raw_bin_count);
539 /* The rest of the file consists of a bunch of
540 <from,self,count> tuples. */
541 while (gmon_read_raw_arc (ifp, &from_pc, &self_pc, &count) == 0)
546 printf ("[gmon_out_read] frompc 0x%lx selfpc 0x%lx count %lu\n",
547 (unsigned long) from_pc, (unsigned long) self_pc, count));
550 cg_tally (from_pc, self_pc, count);
555 /* How many ticks per second? If we can't tell, report
562 fprintf (stderr, _("time is in ticks, not seconds\n"));
568 fprintf (stderr, _("%s: don't know how to deal with file format %d\n"),
569 whoami, file_format);
576 if (output_style & STYLE_GMON_INFO)
578 printf (_("File `%s' (version %d) contains:\n"),
579 filename, gmon_file_version);
581 _("\t%d histogram record\n") :
582 _("\t%d histogram records\n"), nhist);
584 _("\t%d call-graph record\n") :
585 _("\t%d call-graph records\n"), narcs);
587 _("\t%d basic-block count record\n") :
588 _("\t%d basic-block count records\n"), nbbs);
589 first_output = FALSE;
595 gmon_out_write (const char *filename)
598 struct gmon_hdr ghdr;
600 ofp = fopen (filename, FOPEN_WB);
607 if (file_format == FF_AUTO || file_format == FF_MAGIC)
609 /* Write gmon header. */
611 memcpy (&ghdr.cookie[0], GMON_MAGIC, 4);
612 bfd_put_32 (core_bfd, (bfd_vma) GMON_VERSION, (bfd_byte *) ghdr.version);
614 if (fwrite (&ghdr, sizeof (ghdr), 1, ofp) != 1)
620 /* Write execution time histogram if we have one. */
621 if (gmon_input & INPUT_HISTOGRAM)
622 hist_write_hist (ofp, filename);
624 /* Write call graph arcs if we have any. */
625 if (gmon_input & INPUT_CALL_GRAPH)
626 cg_write_arcs (ofp, filename);
628 /* Write basic-block info if we have it. */
629 if (gmon_input & INPUT_BB_COUNTS)
630 bb_write_blocks (ofp, filename);
632 else if (file_format == FF_BSD || file_format == FF_BSD44)
635 unsigned int i, hdrsize;
641 memset (pad, 0, sizeof (pad));
644 /* Decide how large the header will be. Use the 4.4BSD format
645 header if explicitly specified, or if the profiling rate is
646 non-standard. Otherwise, use the old BSD format. */
647 if (file_format == FF_BSD44
651 switch (gmon_get_ptr_size ())
654 hdrsize = GMON_HDRSIZE_BSD44_32;
658 hdrsize = GMON_HDRSIZE_BSD44_64;
665 switch (gmon_get_ptr_size ())
668 hdrsize = GMON_HDRSIZE_OLDBSD_32;
672 hdrsize = GMON_HDRSIZE_OLDBSD_64;
673 /* FIXME: Checking host compiler defines here means that we can't
674 use a cross gprof alpha OSF. */
675 #if defined(__alpha__) && defined (__osf__)
682 /* Write the parts of the headers that are common to both the
683 old BSD and 4.4BSD formats. */
684 if (gmon_io_write_vma (ofp, histograms->lowpc)
685 || gmon_io_write_vma (ofp, histograms->highpc)
686 || gmon_io_write_32 (ofp, histograms->num_bins
687 * sizeof (UNIT) + hdrsize))
693 /* Write out the 4.4BSD header bits, if that's what we're using. */
694 if (file_format == FF_BSD44
697 if (gmon_io_write_32 (ofp, GMONVERSION)
698 || gmon_io_write_32 (ofp, (unsigned int) hz))
705 /* Now write out any necessary padding after the meaningful
708 && fwrite (pad, 1, padsize, ofp) != padsize)
714 /* Dump the samples. */
715 for (i = 0; i < histograms->num_bins; ++i)
717 bfd_put_16 (core_bfd, (bfd_vma) histograms->sample[i],
718 (bfd_byte *) &raw_bin_count[0]);
719 if (fwrite (&raw_bin_count[0], sizeof (raw_bin_count), 1, ofp) != 1)
726 /* Dump the normalized raw arc information. */
727 for (sym = symtab.base; sym < symtab.limit; ++sym)
729 for (arc = sym->cg.children; arc; arc = arc->next_child)
731 if (gmon_write_raw_arc (ofp, arc->parent->addr,
732 arc->child->addr, arc->count))
738 printf ("[dumpsum] frompc 0x%lx selfpc 0x%lx count %lu\n",
739 (unsigned long) arc->parent->addr,
740 (unsigned long) arc->child->addr, arc->count));
748 fprintf (stderr, _("%s: don't know how to deal with file format %d\n"),
749 whoami, file_format);