binutils-gdb/gprof/gmon_io.c

457 lines
11 KiB
C

/*
* Input and output from/to gmon.out files.
*/
#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 */
#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 */
/*
* This probably ought to be in libbfd.
*/
bfd_vma
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);
}
}
/*
* This probably ought to be in libbfd.
*/
void
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: */
if (strcmp (filename, "-") == 0)
{
ifp = stdin;
}
else
{
ifp = fopen (filename, FOPEN_RB);
if (!ifp)
{
perror (filename);
done (1);
}
}
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)))
{
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 */
gmon_file_version = bfd_get_32 (core_bfd, (bfd_byte *) ghdr.version);
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: */
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.
*/
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?).
*/
if (fseek (ifp, 0, SEEK_SET) < 0)
{
perror (filename);
done (1);
}
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);
}
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]);
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. */
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))
{
fprintf (stderr, _("%s: incompatible with first gmon file\n"),
filename);
done (1);
}
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);
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);
printf ("[gmon_out_read] s_lowpc 0x%lx s_highpc 0x%lx\n",
(unsigned long) s_lowpc, (unsigned long) s_highpc);
printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx\n",
(unsigned long) lowpc, (unsigned long) highpc);
printf ("[gmon_out_read] samp_bytes %d hist_num_bins %d\n",
samp_bytes, hist_num_bins));
if (hist_num_bins)
{
++nhist;
}
if (!hist_sample)
{
hist_sample =
(int *) xmalloc (hist_num_bins * sizeof (hist_sample[0]));
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);
}
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:
*/
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);
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: */
cg_tally (from_pc, self_pc, count);
}
fclose (ifp);
if (hz == HZ_WRONG)
{
/*
* How many ticks per second? If we can't tell, report
* time in ticks.
*/
hz = hertz ();
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: */
memcpy (&ghdr.cookie[0], GMON_MAGIC, 4);
bfd_put_32 (core_bfd, GMON_VERSION, (bfd_byte *) ghdr.version);
if (fwrite (&ghdr, sizeof (ghdr), 1, ofp) != 1)
{
perror (filename);
done (1);
}
/* write execution time histogram if we have one: */
if (gmon_input & INPUT_HISTOGRAM)
{
hist_write_hist (ofp, filename);
}
/* write call graph arcs if we have any: */
if (gmon_input & INPUT_CALL_GRAPH)
{
cg_write_arcs (ofp, filename);
}
/* write basic-block info if we have it: */
if (gmon_input & INPUT_BB_COUNTS)
{
bb_write_blocks (ofp, filename);
}
}
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. */
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: */
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: */
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));
}
}
fclose (ofp);
}
else
{
fprintf (stderr, _("%s: don't know how to deal with file format %d\n"),
whoami, file_format);
done (1);
}
}