binutils-gdb/gprof/gmon_io.c

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/* gmon_io.c - Input and output from/to gmon.out files.
Copyright 2000, 2001 Free Software Foundation, Inc.
This file is part of GNU Binutils.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
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#include "cg_arcs.h"
#include "basic_blocks.h"
#include "bfd.h"
#include "corefile.h"
#include "call_graph.h"
#include "gmon_io.h"
#include "gmon_out.h"
#include "gmon.h" /* Fetch header for old format. */
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#include "gprof.h"
#include "hertz.h"
#include "hist.h"
#include "libiberty.h"
int gmon_input = 0;
int gmon_file_version = 0; /* 0 == old (non-versioned) file format. */
int
DEFUN (gmon_io_read_vma, (ifp, valp), FILE * ifp AND bfd_vma *valp)
{
char buf[8];
bfd_vma val;
switch (GMON_PTR_SIZE)
{
case 4:
if (fread (buf, 1, 4, ifp) != 4)
return 1;
val = bfd_get_32 (core_bfd, buf);
break;
case 8:
if (fread (buf, 1, 8, ifp) != 8)
return 1;
val = bfd_get_64 (core_bfd, buf);
break;
default:
fprintf (stderr, _("%s: GMON_PTR_SIZE has unexpected value of %u\n"),
whoami, GMON_PTR_SIZE);
done (1);
}
*valp = val;
return 0;
}
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int
DEFUN (gmon_io_read_32, (ifp, valp), FILE * ifp AND unsigned int *valp)
{
char buf[4];
if (fread (buf, 1, 4, ifp) != 4)
return 1;
*valp = bfd_get_32 (core_bfd, buf);
return 0;
}
int
DEFUN (gmon_io_read, (ifp, buf, n), FILE * ifp AND char *buf AND size_t n)
{
if (fread (buf, 1, n, ifp) != n)
return 1;
return 0;
}
int
DEFUN (gmon_io_write_vma, (ofp, val), FILE * ofp AND bfd_vma val)
{
char buf[8];
switch (GMON_PTR_SIZE)
{
case 4:
bfd_put_32 (core_bfd, val, buf);
if (fwrite (buf, 1, 4, ofp) != 4)
return 1;
break;
case 8:
bfd_put_64 (core_bfd, val, buf);
if (fwrite (buf, 1, 8, ofp) != 8)
return 1;
break;
default:
fprintf (stderr, _("%s: GMON_PTR_SIZE has unexpected value of %u\n"),
whoami, GMON_PTR_SIZE);
done (1);
}
return 0;
}
int
DEFUN (gmon_io_write_32, (ofp, val), FILE * ofp AND unsigned int val)
{
char buf[4];
bfd_put_32 (core_bfd, val, buf);
if (fwrite (buf, 1, 4, ofp) != 4)
return 1;
return 0;
}
int
DEFUN (gmon_io_write_8, (ofp, val), FILE * ofp AND unsigned char val)
{
char buf[1];
bfd_put_8 (core_bfd, val, buf);
if (fwrite (buf, 1, 1, ofp) != 1)
return 1;
return 0;
}
int
DEFUN (gmon_io_write, (ofp, buf, n), FILE * ofp AND char *buf AND size_t n)
{
if (fwrite (buf, 1, n, ofp) != n)
return 1;
return 0;
}
/* get_vma and put_vma are for backwards compatibility only */
static bfd_vma
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DEFUN (get_vma, (abfd, addr), bfd * abfd AND bfd_byte * addr)
{
switch (sizeof (char*))
{
case 4:
return bfd_get_32 (abfd, addr);
case 8:
return bfd_get_64 (abfd, addr);
default:
fprintf (stderr, _("%s: bfd_vma has unexpected size of %ld bytes\n"),
whoami, (long) sizeof (char*));
done (1);
}
}
static void
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DEFUN (put_vma, (abfd, val, addr), bfd * abfd AND bfd_vma val AND bfd_byte * addr)
{
switch (sizeof (char*))
{
case 4:
bfd_put_32 (abfd, val, addr);
break;
case 8:
bfd_put_64 (abfd, val, addr);
break;
default:
fprintf (stderr, _("%s: bfd_vma has unexpected size of %ld bytes\n"),
whoami, (long) sizeof (char*));
done (1);
}
}
void
DEFUN (gmon_out_read, (filename), const char *filename)
{
FILE *ifp;
struct gmon_hdr ghdr;
unsigned char tag;
int nhist = 0, narcs = 0, nbbs = 0;
/* Open gmon.out file. */
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if (strcmp (filename, "-") == 0)
{
ifp = stdin;
#ifdef SET_BINARY
SET_BINARY (fileno (stdin));
#endif
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}
else
{
ifp = fopen (filename, FOPEN_RB);
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if (!ifp)
{
perror (filename);
done (1);
}
}
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if (fread (&ghdr, sizeof (struct gmon_hdr), 1, ifp) != 1)
{
fprintf (stderr, _("%s: file too short to be a gmon file\n"),
filename);
done (1);
}
if ((file_format == FF_MAGIC)
|| (file_format == FF_AUTO && !strncmp (&ghdr.cookie[0], GMON_MAGIC, 4)))
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{
if (file_format == FF_MAGIC && strncmp (&ghdr.cookie[0], GMON_MAGIC, 4))
{
fprintf (stderr, _("%s: file `%s' has bad magic cookie\n"),
whoami, filename);
done (1);
}
/* Right magic, so it's probably really a new gmon.out file. */
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gmon_file_version = bfd_get_32 (core_bfd, (bfd_byte *) ghdr.version);
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if (gmon_file_version != GMON_VERSION && gmon_file_version != 0)
{
fprintf (stderr,
_("%s: file `%s' has unsupported version %d\n"),
whoami, filename, gmon_file_version);
done (1);
}
/* Read in all the records. */
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while (fread (&tag, sizeof (tag), 1, ifp) == 1)
{
switch (tag)
{
case GMON_TAG_TIME_HIST:
++nhist;
gmon_input |= INPUT_HISTOGRAM;
hist_read_rec (ifp, filename);
break;
case GMON_TAG_CG_ARC:
++narcs;
gmon_input |= INPUT_CALL_GRAPH;
cg_read_rec (ifp, filename);
break;
case GMON_TAG_BB_COUNT:
++nbbs;
gmon_input |= INPUT_BB_COUNTS;
bb_read_rec (ifp, filename);
break;
default:
fprintf (stderr,
_("%s: %s: found bad tag %d (file corrupted?)\n"),
whoami, filename, tag);
done (1);
}
}
}
else if (file_format == FF_AUTO
|| file_format == FF_BSD
|| file_format == FF_BSD44)
{
struct hdr
{
bfd_vma low_pc;
bfd_vma high_pc;
int ncnt;
};
int i, samp_bytes, header_size;
unsigned long count;
bfd_vma from_pc, self_pc;
struct raw_arc raw_arc;
struct raw_phdr raw;
static struct hdr h;
UNIT raw_bin_count;
struct hdr tmp;
/* Information from a gmon.out file is in two parts: an array of
sampling hits within pc ranges, and the arcs. */
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gmon_input = INPUT_HISTOGRAM | INPUT_CALL_GRAPH;
/* This fseek() ought to work even on stdin as long as it's
not an interactive device (heck, is there anybody who would
want to type in a gmon.out at the terminal?). */
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if (fseek (ifp, 0, SEEK_SET) < 0)
{
perror (filename);
done (1);
}
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if (fread (&raw, 1, sizeof (struct raw_phdr), ifp)
!= sizeof (struct raw_phdr))
{
fprintf (stderr, _("%s: file too short to be a gmon file\n"),
filename);
done (1);
}
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tmp.low_pc = get_vma (core_bfd, (bfd_byte *) &raw.low_pc[0]);
tmp.high_pc = get_vma (core_bfd, (bfd_byte *) &raw.high_pc[0]);
tmp.ncnt = bfd_get_32 (core_bfd, (bfd_byte *) &raw.ncnt[0]);
if (bfd_get_32 (core_bfd, (bfd_byte *) &raw.version[0])
== GMONVERSION)
{
int profrate;
/* 4.4BSD format header. */
profrate = bfd_get_32 (core_bfd, (bfd_byte *) &raw.profrate[0]);
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if (!s_highpc)
hz = profrate;
else if (hz != profrate)
{
fprintf (stderr,
_("%s: profiling rate incompatible with first gmon file\n"),
filename);
done (1);
}
header_size = sizeof (struct raw_phdr);
}
else
{
/* Old style BSD format. */
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if (file_format == FF_BSD44)
{
fprintf (stderr, _("%s: file `%s' has bad magic cookie\n"),
whoami, filename);
done (1);
}
if (fseek (ifp, sizeof (struct old_raw_phdr), SEEK_SET) < 0)
{
perror (filename);
done (1);
}
header_size = sizeof (struct old_raw_phdr);
}
if (s_highpc && (tmp.low_pc != h.low_pc
|| tmp.high_pc != h.high_pc || tmp.ncnt != h.ncnt))
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{
fprintf (stderr, _("%s: incompatible with first gmon file\n"),
filename);
done (1);
}
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h = tmp;
s_lowpc = (bfd_vma) h.low_pc;
s_highpc = (bfd_vma) h.high_pc;
lowpc = (bfd_vma) h.low_pc / sizeof (UNIT);
highpc = (bfd_vma) h.high_pc / sizeof (UNIT);
samp_bytes = h.ncnt - header_size;
hist_num_bins = samp_bytes / sizeof (UNIT);
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DBG (SAMPLEDEBUG,
printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx ncnt %d\n",
(unsigned long) h.low_pc, (unsigned long) h.high_pc,
h.ncnt);
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printf ("[gmon_out_read] s_lowpc 0x%lx s_highpc 0x%lx\n",
(unsigned long) s_lowpc, (unsigned long) s_highpc);
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printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx\n",
(unsigned long) lowpc, (unsigned long) highpc);
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printf ("[gmon_out_read] samp_bytes %d hist_num_bins %d\n",
samp_bytes, hist_num_bins));
/* Make sure that we have sensible values. */
if (samp_bytes < 0 || lowpc > highpc)
{
fprintf (stderr,
_("%s: file '%s' does not appear to be in gmon.out format\n"),
whoami, filename);
done (1);
}
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if (hist_num_bins)
++nhist;
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if (!hist_sample)
{
hist_sample =
(int *) xmalloc (hist_num_bins * sizeof (hist_sample[0]));
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memset (hist_sample, 0, hist_num_bins * sizeof (hist_sample[0]));
}
for (i = 0; i < hist_num_bins; ++i)
{
if (fread (raw_bin_count, sizeof (raw_bin_count), 1, ifp) != 1)
{
fprintf (stderr,
_("%s: unexpected EOF after reading %d/%d bins\n"),
whoami, --i, hist_num_bins);
done (1);
}
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hist_sample[i] += bfd_get_16 (core_bfd, (bfd_byte *) raw_bin_count);
}
/* The rest of the file consists of a bunch of
<from,self,count> tuples. */
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while (fread (&raw_arc, sizeof (raw_arc), 1, ifp) == 1)
{
++narcs;
from_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.from_pc);
self_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.self_pc);
count = bfd_get_32 (core_bfd, (bfd_byte *) raw_arc.count);
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DBG (SAMPLEDEBUG,
printf ("[gmon_out_read] frompc 0x%lx selfpc 0x%lx count %lu\n",
(unsigned long) from_pc, (unsigned long) self_pc, count));
/* Add this arc. */
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cg_tally (from_pc, self_pc, count);
}
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fclose (ifp);
if (hz == HZ_WRONG)
{
/* How many ticks per second? If we can't tell, report
time in ticks. */
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hz = hertz ();
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if (hz == HZ_WRONG)
{
hz = 1;
fprintf (stderr, _("time is in ticks, not seconds\n"));
}
}
}
else
{
fprintf (stderr, _("%s: don't know how to deal with file format %d\n"),
whoami, file_format);
done (1);
}
if (output_style & STYLE_GMON_INFO)
{
printf (_("File `%s' (version %d) contains:\n"),
filename, gmon_file_version);
printf (_("\t%d histogram record%s\n"),
nhist, nhist == 1 ? "" : "s");
printf (_("\t%d call-graph record%s\n"),
narcs, narcs == 1 ? "" : "s");
printf (_("\t%d basic-block count record%s\n"),
nbbs, nbbs == 1 ? "" : "s");
first_output = FALSE;
}
}
void
DEFUN (gmon_out_write, (filename), const char *filename)
{
FILE *ofp;
struct gmon_hdr ghdr;
ofp = fopen (filename, FOPEN_WB);
if (!ofp)
{
perror (filename);
done (1);
}
if (file_format == FF_AUTO || file_format == FF_MAGIC)
{
/* Write gmon header. */
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memcpy (&ghdr.cookie[0], GMON_MAGIC, 4);
bfd_put_32 (core_bfd, GMON_VERSION, (bfd_byte *) ghdr.version);
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if (fwrite (&ghdr, sizeof (ghdr), 1, ofp) != 1)
{
perror (filename);
done (1);
}
/* Write execution time histogram if we have one. */
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if (gmon_input & INPUT_HISTOGRAM)
hist_write_hist (ofp, filename);
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/* Write call graph arcs if we have any. */
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if (gmon_input & INPUT_CALL_GRAPH)
cg_write_arcs (ofp, filename);
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/* Write basic-block info if we have it. */
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if (gmon_input & INPUT_BB_COUNTS)
bb_write_blocks (ofp, filename);
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}
else if (file_format == FF_BSD || file_format == FF_BSD44)
{
struct raw_arc raw_arc;
UNIT raw_bin_count;
struct raw_phdr h;
int i;
Arc *arc;
Sym *sym;
memset (&h, 0, sizeof h);
put_vma (core_bfd, s_lowpc, (bfd_byte *) &h.low_pc);
put_vma (core_bfd, s_highpc, (bfd_byte *) &h.high_pc);
bfd_put_32 (core_bfd,
hist_num_bins * sizeof (UNIT) + sizeof (struct raw_phdr),
(bfd_byte *) &h.ncnt);
/* Write header. Use new style BSD format is explicitly
specified, or if the profiling rate is non-standard;
otherwise, use the old BSD format. */
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if (file_format == FF_BSD44
|| hz != hertz ())
{
bfd_put_32 (core_bfd, GMONVERSION, (bfd_byte *) &h.version);
bfd_put_32 (core_bfd, hz, (bfd_byte *) &h.profrate);
if (fwrite (&h, sizeof (struct raw_phdr), 1, ofp) != 1)
{
perror (filename);
done (1);
}
}
else
{
if (fwrite (&h, sizeof (struct old_raw_phdr), 1, ofp) != 1)
{
perror (filename);
done (1);
}
}
/* Dump the samples. */
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for (i = 0; i < hist_num_bins; ++i)
{
bfd_put_16 (core_bfd, hist_sample[i], (bfd_byte *) & raw_bin_count[0]);
if (fwrite (&raw_bin_count[0], sizeof (raw_bin_count), 1, ofp) != 1)
{
perror (filename);
done (1);
}
}
/* Dump the normalized raw arc information. */
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for (sym = symtab.base; sym < symtab.limit; ++sym)
{
for (arc = sym->cg.children; arc; arc = arc->next_child)
{
put_vma (core_bfd, arc->parent->addr,
(bfd_byte *) raw_arc.from_pc);
put_vma (core_bfd, arc->child->addr,
(bfd_byte *) raw_arc.self_pc);
bfd_put_32 (core_bfd, arc->count, (bfd_byte *) raw_arc.count);
if (fwrite (&raw_arc, sizeof (raw_arc), 1, ofp) != 1)
{
perror (filename);
done (1);
}
DBG (SAMPLEDEBUG,
printf ("[dumpsum] frompc 0x%lx selfpc 0x%lx count %lu\n",
(unsigned long) arc->parent->addr,
(unsigned long) arc->child->addr, arc->count));
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}
}
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fclose (ofp);
}
else
{
fprintf (stderr, _("%s: don't know how to deal with file format %d\n"),
whoami, file_format);
done (1);
}
}