binutils-gdb/gprof/basic_blocks.c

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/* basic_blocks.c - Basic-block level related code: reading/writing
of basic-block info to/from gmon.out; computing and formatting of
basic-block related statistics.
Copyright 2000, 2001, 2002 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. */
* alpha.c (alpha_Instruction): Don't use. (alpha_find_call): Avoid use of bitfields and casts between pointers and integers of different sizes. Avoid endian problems when cross-compiling. * vax.c (vax_find_call): Likewise. (struct modebyte): Don't use. (vax_operandmode): Pass in an unsigned char *. (vax_operandlength): Likewise. (vax_reladdr): Rename to vax_offset and return relative offset rather than address. * i386.c (i386_find_call): Avoid casts between pointers and integers of different sizes. * sparc.c (sparc_find_call): Likewise. Avoid endian problems. * tahoe.c (tahoe_find_call): Likewise. (tahoe_reladdr): Rename to tahoe_offset and return relative offset rather than address. * basic_blocks.h: Don't include headers here. * call_graph.h: Likewise. * cg_arcs.h: Likewise. * cg_print.h: Likewise. * corefile.h: Likewise. * gmon_io.h: Likewise. * gmon_out.h: Likewise. * hertz.h: Likewise. * hist.h: Likewise. * source.h: Likewise. * sym_ids.h: Likewise. * symtab.h: Likewise. * gprof.h: Don't include ansidecl.h, do include bfd.h. (bool): Don't typedef. * alpha.c: Adjust #include's for above header changes. * basic_blocks.c: Likewise. * call_graph.c: Likewise. * cg_arcs.c: Likewise. * cg_dfn.c: Likewise. * cg_print.c: Likewise. * corefile.c: Likewise. * gmon_io.c: Likewise. * gprof.c: Likewise. * hertz.c: Likewise. * hist.c: Likewise. * i386.c: Likewise. * mips.c: Likewise. * sparc.c: Likewise. * sym_ids.c: Likewise. * symtab.c: Likewise. * tahoe.c: Likewise. * utils.c: Likewise. * vax.c: Likewise. * po/POTFILES.in: Regenerate.
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#include "libiberty.h"
#include "gprof.h"
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#include "basic_blocks.h"
#include "corefile.h"
#include "gmon_io.h"
#include "gmon_out.h"
* alpha.c (alpha_Instruction): Don't use. (alpha_find_call): Avoid use of bitfields and casts between pointers and integers of different sizes. Avoid endian problems when cross-compiling. * vax.c (vax_find_call): Likewise. (struct modebyte): Don't use. (vax_operandmode): Pass in an unsigned char *. (vax_operandlength): Likewise. (vax_reladdr): Rename to vax_offset and return relative offset rather than address. * i386.c (i386_find_call): Avoid casts between pointers and integers of different sizes. * sparc.c (sparc_find_call): Likewise. Avoid endian problems. * tahoe.c (tahoe_find_call): Likewise. (tahoe_reladdr): Rename to tahoe_offset and return relative offset rather than address. * basic_blocks.h: Don't include headers here. * call_graph.h: Likewise. * cg_arcs.h: Likewise. * cg_print.h: Likewise. * corefile.h: Likewise. * gmon_io.h: Likewise. * gmon_out.h: Likewise. * hertz.h: Likewise. * hist.h: Likewise. * source.h: Likewise. * sym_ids.h: Likewise. * symtab.h: Likewise. * gprof.h: Don't include ansidecl.h, do include bfd.h. (bool): Don't typedef. * alpha.c: Adjust #include's for above header changes. * basic_blocks.c: Likewise. * call_graph.c: Likewise. * cg_arcs.c: Likewise. * cg_dfn.c: Likewise. * cg_print.c: Likewise. * corefile.c: Likewise. * gmon_io.c: Likewise. * gprof.c: Likewise. * hertz.c: Likewise. * hist.c: Likewise. * i386.c: Likewise. * mips.c: Likewise. * sparc.c: Likewise. * sym_ids.c: Likewise. * symtab.c: Likewise. * tahoe.c: Likewise. * utils.c: Likewise. * vax.c: Likewise. * po/POTFILES.in: Regenerate.
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#include "search_list.h"
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#include "source.h"
* alpha.c (alpha_Instruction): Don't use. (alpha_find_call): Avoid use of bitfields and casts between pointers and integers of different sizes. Avoid endian problems when cross-compiling. * vax.c (vax_find_call): Likewise. (struct modebyte): Don't use. (vax_operandmode): Pass in an unsigned char *. (vax_operandlength): Likewise. (vax_reladdr): Rename to vax_offset and return relative offset rather than address. * i386.c (i386_find_call): Avoid casts between pointers and integers of different sizes. * sparc.c (sparc_find_call): Likewise. Avoid endian problems. * tahoe.c (tahoe_find_call): Likewise. (tahoe_reladdr): Rename to tahoe_offset and return relative offset rather than address. * basic_blocks.h: Don't include headers here. * call_graph.h: Likewise. * cg_arcs.h: Likewise. * cg_print.h: Likewise. * corefile.h: Likewise. * gmon_io.h: Likewise. * gmon_out.h: Likewise. * hertz.h: Likewise. * hist.h: Likewise. * source.h: Likewise. * sym_ids.h: Likewise. * symtab.h: Likewise. * gprof.h: Don't include ansidecl.h, do include bfd.h. (bool): Don't typedef. * alpha.c: Adjust #include's for above header changes. * basic_blocks.c: Likewise. * call_graph.c: Likewise. * cg_arcs.c: Likewise. * cg_dfn.c: Likewise. * cg_print.c: Likewise. * corefile.c: Likewise. * gmon_io.c: Likewise. * gprof.c: Likewise. * hertz.c: Likewise. * hist.c: Likewise. * i386.c: Likewise. * mips.c: Likewise. * sparc.c: Likewise. * sym_ids.c: Likewise. * symtab.c: Likewise. * tahoe.c: Likewise. * utils.c: Likewise. * vax.c: Likewise. * po/POTFILES.in: Regenerate.
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#include "symtab.h"
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#include "sym_ids.h"
static int cmp_bb PARAMS ((const PTR, const PTR));
static int cmp_ncalls PARAMS ((const PTR, const PTR));
static void fskip_string PARAMS ((FILE *));
static void annotate_with_count PARAMS ((char *, unsigned int, int, PTR));
/* Default option values: */
boolean bb_annotate_all_lines = false;
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unsigned long bb_min_calls = 1;
int bb_table_length = 10;
/* Variables used to compute annotated source listing stats: */
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static long num_executable_lines;
static long num_lines_executed;
/* Helper for sorting. Compares two symbols and returns result
such that sorting will be increasing according to filename, line
number, and address (in that order). */
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static int
cmp_bb (lp, rp)
const PTR lp;
const PTR rp;
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{
int r;
const Sym *left = *(const Sym **) lp;
const Sym *right = *(const Sym **) rp;
if (left->file && right->file)
{
r = strcmp (left->file->name, right->file->name);
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if (r)
return r;
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if (left->line_num != right->line_num)
return left->line_num - right->line_num;
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}
if (left->addr < right->addr)
return -1;
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else if (left->addr > right->addr)
return 1;
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else
return 0;
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}
/* Helper for sorting. Order basic blocks in decreasing number of
calls, ties are broken in increasing order of line numbers. */
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static int
cmp_ncalls (lp, rp)
const PTR lp;
const PTR rp;
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{
const Sym *left = *(const Sym **) lp;
const Sym *right = *(const Sym **) rp;
if (!left)
return 1;
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else if (!right)
return -1;
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if (left->ncalls < right->ncalls)
return 1;
else if (left->ncalls > right->ncalls)
return -1;
return left->line_num - right->line_num;
}
/* Skip over variable length string. */
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static void
fskip_string (fp)
FILE *fp;
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{
int ch;
while ((ch = fgetc (fp)) != EOF)
{
if (ch == '\0')
break;
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}
}
/* Read a basic-block record from file IFP. FILENAME is the name
of file IFP and is provided for formatting error-messages only. */
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void
bb_read_rec (ifp, filename)
FILE *ifp;
const char *filename;
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{
int nblocks, b;
bfd_vma addr, ncalls;
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Sym *sym;
if (gmon_io_read_32 (ifp, &nblocks))
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{
fprintf (stderr, _("%s: %s: unexpected end of file\n"),
whoami, filename);
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done (1);
}
nblocks = bfd_get_32 (core_bfd, (bfd_byte *) & nblocks);
if (gmon_file_version == 0)
fskip_string (ifp);
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for (b = 0; b < nblocks; ++b)
{
if (gmon_file_version == 0)
{
int line_num;
/* Version 0 had lots of extra stuff that we don't
care about anymore. */
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if ((fread (&ncalls, sizeof (ncalls), 1, ifp) != 1)
|| (fread (&addr, sizeof (addr), 1, ifp) != 1)
|| (fskip_string (ifp), false)
|| (fskip_string (ifp), false)
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|| (fread (&line_num, sizeof (line_num), 1, ifp) != 1))
{
perror (filename);
done (1);
}
}
else if (gmon_io_read_vma (ifp, &addr)
|| gmon_io_read_vma (ifp, &ncalls))
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{
perror (filename);
done (1);
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}
/* Basic-block execution counts are meaningful only if we're
profiling at the line-by-line level: */
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if (line_granularity)
{
sym = sym_lookup (&symtab, addr);
if (sym)
{
int i;
DBG (BBDEBUG,
printf ("[bb_read_rec] 0x%lx->0x%lx (%s:%d) cnt=%lu\n",
(unsigned long) addr, (unsigned long) sym->addr,
sym->name, sym->line_num, (unsigned long) ncalls));
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for (i = 0; i < NBBS; i++)
{
if (! sym->bb_addr[i] || sym->bb_addr[i] == addr)
{
sym->bb_addr[i] = addr;
sym->bb_calls[i] += ncalls;
break;
}
}
}
}
else
{
static boolean user_warned = false;
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if (!user_warned)
{
user_warned = true;
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fprintf (stderr,
_("%s: warning: ignoring basic-block exec counts (use -l or --line)\n"),
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whoami);
}
}
}
return;
}
/* Write all basic-blocks with non-zero counts to file OFP. FILENAME
is the name of OFP and is provided for producing error-messages
only. */
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void
bb_write_blocks (ofp, filename)
FILE *ofp;
const char *filename;
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{
unsigned int nblocks = 0;
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Sym *sym;
int i;
/* Count how many non-zero blocks with have: */
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for (sym = symtab.base; sym < symtab.limit; ++sym)
{
for (i = 0; i < NBBS && sym->bb_addr[i]; i++)
;
nblocks += i;
}
/* Write header: */
if (gmon_io_write_8 (ofp, GMON_TAG_BB_COUNT)
|| gmon_io_write_32 (ofp, nblocks))
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{
perror (filename);
done (1);
}
/* Write counts: */
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for (sym = symtab.base; sym < symtab.limit; ++sym)
{
for (i = 0; i < NBBS && sym->bb_addr[i]; i++)
{
if (gmon_io_write_vma (ofp, sym->bb_addr[i])
|| gmon_io_write_vma (ofp, (bfd_vma) sym->bb_calls[i]))
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{
perror (filename);
done (1);
}
}
}
}
/* Output basic-block statistics in a format that is easily parseable.
Current the format is:
<filename>:<line-number>: (<function-name>:<bb-addr): <ncalls> */
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void
print_exec_counts ()
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{
Sym **sorted_bbs, *sym;
unsigned int i, j, len;
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if (first_output)
first_output = false;
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else
printf ("\f\n");
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/* Sort basic-blocks according to function name and line number: */
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sorted_bbs = (Sym **) xmalloc (symtab.len * sizeof (sorted_bbs[0]));
len = 0;
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for (sym = symtab.base; sym < symtab.limit; ++sym)
{
/* Accept symbol if it's in the INCL_EXEC table
or there is no INCL_EXEC table
and it does not appear in the EXCL_EXEC table. */
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if (sym_lookup (&syms[INCL_EXEC], sym->addr)
|| (syms[INCL_EXEC].len == 0
&& !sym_lookup (&syms[EXCL_EXEC], sym->addr)))
{
sorted_bbs[len++] = sym;
}
}
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qsort (sorted_bbs, len, sizeof (sorted_bbs[0]), cmp_bb);
/* Output basic-blocks: */
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for (i = 0; i < len; ++i)
{
if (sym->ncalls > 0 || ! ignore_zeros)
{
/* FIXME: This only works if bfd_vma is unsigned long. */
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printf (_("%s:%d: (%s:0x%lx) %lu executions\n"),
sym->file ? sym->file->name : _("<unknown>"), sym->line_num,
sym->name, (unsigned long) sym->addr, sym->ncalls);
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}
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for (j = 0; j < NBBS && sym->bb_addr[j]; j ++)
{
if (sym->bb_calls[j] > 0 || ! ignore_zeros)
{
/* FIXME: This only works if bfd_vma is unsigned long. */
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printf (_("%s:%d: (%s:0x%lx) %lu executions\n"),
sym->file ? sym->file->name : _("<unknown>"), sym->line_num,
sym->name, (unsigned long) sym->bb_addr[j],
sym->bb_calls[j]);
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}
}
}
free (sorted_bbs);
}
/* Helper for bb_annotated_source: format annotation containing
number of line executions. Depends on being called on each
line of a file in sequential order.
Global variable bb_annotate_all_lines enables execution count
compression (counts are supressed if identical to the last one)
and prints counts on all executed lines. Otherwise, print
all basic-block execution counts exactly once on the line
that starts the basic-block. */
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static void
annotate_with_count (buf, width, line_num, arg)
char *buf;
unsigned int width;
int line_num;
PTR arg;
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{
Source_File *sf = arg;
Sym *b;
unsigned int i;
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static unsigned long last_count;
unsigned long last_print = (unsigned long) -1;
b = NULL;
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if (line_num <= sf->num_lines)
b = sf->line[line_num - 1];
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if (!b)
{
for (i = 0; i < width; i++)
buf[i] = ' ';
buf[width] = '\0';
}
else
{
char tmpbuf[NBBS * 30];
char *p;
unsigned long ncalls;
int ncalls_set;
unsigned int len;
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++num_executable_lines;
p = tmpbuf;
*p = '\0';
ncalls = 0;
ncalls_set = 0;
/* If this is a function entry point, label the line no matter what.
Otherwise, we're in the middle of a function, so check to see
if the first basic-block address is larger than the starting
address of the line. If so, then this line begins with a
a portion of the previous basic-block, so print that prior
execution count (if bb_annotate_all_lines is set). */
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if (b->is_func)
{
sprintf (p, "%lu", b->ncalls);
p += strlen (p);
last_count = b->ncalls;
last_print = last_count;
ncalls = b->ncalls;
ncalls_set = 1;
}
else if (bb_annotate_all_lines
&& b->bb_addr[0] && b->bb_addr[0] > b->addr)
{
sprintf (p, "%lu", last_count);
p += strlen (p);
last_print = last_count;
ncalls = last_count;
ncalls_set = 1;
}
/* Loop through all of this line's basic-blocks. For each one,
update last_count, then compress sequential identical counts
(if bb_annotate_all_lines) and print the execution count. */
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for (i = 0; i < NBBS && b->bb_addr[i]; i++)
{
last_count = b->bb_calls[i];
if (! ncalls_set)
{
ncalls = 0;
ncalls_set = 1;
}
ncalls += last_count;
if (bb_annotate_all_lines && last_count == last_print)
continue;
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if (p > tmpbuf)
*p++ = ',';
sprintf (p, "%lu", last_count);
p += strlen (p);
last_print = last_count;
}
/* We're done. If nothing has been printed on this line,
print the last execution count (bb_annotate_all_lines),
which could be from either a previous line (if there were
no BBs on this line), or from this line (if all our BB
counts were compressed out because they were identical). */
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if (bb_annotate_all_lines && p == tmpbuf)
{
sprintf (p, "%lu", last_count);
p += strlen (p);
ncalls = last_count;
ncalls_set = 1;
}
if (! ncalls_set)
{
unsigned int c;
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for (c = 0; c < width; c++)
buf[c] = ' ';
buf[width] = '\0';
return;
}
++num_lines_executed;
if (ncalls < bb_min_calls)
{
strcpy (tmpbuf, "#####");
p = tmpbuf + 5;
}
strcpy (p, " -> ");
p += 4;
len = p - tmpbuf;
if (len >= width)
{
strncpy (buf, tmpbuf, width);
buf[width] = '\0';
}
else
{
unsigned int c;
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strcpy (buf + width - len, tmpbuf);
for (c = 0; c < width - len; ++c)
buf[c] = ' ';
}
}
}
/* Annotate the files named in SOURCE_FILES with basic-block statistics
(execution counts). After each source files, a few statistics
regarding that source file are printed. */
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void
print_annotated_source ()
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{
Sym *sym, *line_stats, *new_line;
Source_File *sf;
int i, table_len;
FILE *ofp;
/* Find maximum line number for each source file that user is
interested in: */
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for (sym = symtab.base; sym < symtab.limit; ++sym)
{
/* Accept symbol if it's file is known, its line number is
bigger than anything we have seen for that file so far and
if it's in the INCL_ANNO table or there is no INCL_ANNO
table and it does not appear in the EXCL_ANNO table. */
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if (sym->file && sym->line_num > sym->file->num_lines
&& (sym_lookup (&syms[INCL_ANNO], sym->addr)
|| (syms[INCL_ANNO].len == 0
&& !sym_lookup (&syms[EXCL_ANNO], sym->addr))))
{
sym->file->num_lines = sym->line_num;
}
}
/* Allocate line descriptors: */
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for (sf = first_src_file; sf; sf = sf->next)
{
if (sf->num_lines > 0)
{
sf->line = (void *) xmalloc (sf->num_lines * sizeof (sf->line[0]));
memset (sf->line, 0, sf->num_lines * sizeof (sf->line[0]));
}
}
/* Count executions per line: */
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for (sym = symtab.base; sym < symtab.limit; ++sym)
{
if (sym->file && sym->file->num_lines
&& (sym_lookup (&syms[INCL_ANNO], sym->addr)
|| (syms[INCL_ANNO].len == 0
&& !sym_lookup (&syms[EXCL_ANNO], sym->addr))))
{
sym->file->ncalls += sym->ncalls;
line_stats = sym->file->line[sym->line_num - 1];
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if (!line_stats)
{
/* Common case has at most one basic-block per source line: */
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sym->file->line[sym->line_num - 1] = sym;
}
else if (!line_stats->addr)
{
/* sym is the 3rd .. nth basic block for this line: */
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line_stats->ncalls += sym->ncalls;
}
else
{
/* sym is the second basic block for this line. */
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new_line = (Sym *) xmalloc (sizeof (*new_line));
*new_line = *line_stats;
new_line->addr = 0;
new_line->ncalls += sym->ncalls;
sym->file->line[sym->line_num - 1] = new_line;
}
}
}
/* Plod over source files, annotating them: */
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for (sf = first_src_file; sf; sf = sf->next)
{
if (!sf->num_lines || (ignore_zeros && sf->ncalls == 0))
continue;
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num_executable_lines = num_lines_executed = 0;
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ofp = annotate_source (sf, 16, annotate_with_count, sf);
if (!ofp)
continue;
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if (bb_table_length > 0)
{
fprintf (ofp, _("\n\nTop %d Lines:\n\n Line Count\n\n"),
bb_table_length);
/* Abuse line arrays---it's not needed anymore: */
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qsort (sf->line, sf->num_lines, sizeof (sf->line[0]), cmp_ncalls);
table_len = bb_table_length;
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if (table_len > sf->num_lines)
table_len = sf->num_lines;
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for (i = 0; i < table_len; ++i)
{
sym = sf->line[i];
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if (!sym || sym->ncalls == 0)
break;
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fprintf (ofp, "%9d %10lu\n", sym->line_num, sym->ncalls);
}
}
free (sf->line);
sf->line = 0;
fprintf (ofp, _("\nExecution Summary:\n\n"));
fprintf (ofp, _("%9ld Executable lines in this file\n"),
num_executable_lines);
fprintf (ofp, _("%9ld Lines executed\n"), num_lines_executed);
fprintf (ofp, _("%9.2f Percent of the file executed\n"),
num_executable_lines
? 100.0 * num_lines_executed / (double) num_executable_lines
: 100.0);
fprintf (ofp, _("\n%9lu Total number of line executions\n"),
sf->ncalls);
fprintf (ofp, _("%9.2f Average executions per line\n"),
num_executable_lines
? (double) sf->ncalls / (double) num_executable_lines
: 0.0);
1999-05-03 09:29:11 +02:00
if (ofp != stdout)
fclose (ofp);
1999-05-03 09:29:11 +02:00
}
}