mirror of
https://sourceware.org/git/binutils-gdb.git
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a2c5833233
The result of running etc/update-copyright.py --this-year, fixing all the files whose mode is changed by the script, plus a build with --enable-maintainer-mode --enable-cgen-maint=yes, then checking out */po/*.pot which we don't update frequently. The copy of cgen was with commit d1dd5fcc38ead reverted as that commit breaks building of bfp opcodes files.
586 lines
15 KiB
C
586 lines
15 KiB
C
/* basic_blocks.c - Basic-block level related code: reading/writing
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of basic-block info to/from gmon.out; computing and formatting of
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basic-block related statistics.
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Copyright (C) 1999-2022 Free Software Foundation, Inc.
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This file is part of GNU Binutils.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "gprof.h"
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#include "libiberty.h"
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#include "filenames.h"
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#include "basic_blocks.h"
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#include "corefile.h"
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#include "gmon_io.h"
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#include "gmon_out.h"
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#include "search_list.h"
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#include "source.h"
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#include "symtab.h"
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#include "sym_ids.h"
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static int cmp_bb (const PTR, const PTR);
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static int cmp_ncalls (const PTR, const PTR);
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static void fskip_string (FILE *);
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static void annotate_with_count (char *, unsigned int, int, PTR);
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/* Default option values: */
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bool bb_annotate_all_lines = false;
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unsigned long bb_min_calls = 1;
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int bb_table_length = 10;
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/* Variables used to compute annotated source listing stats: */
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static long num_executable_lines;
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static long num_lines_executed;
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/* Helper for sorting. Compares two symbols and returns result
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such that sorting will be increasing according to filename, line
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number, and address (in that order). */
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static int
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cmp_bb (const PTR lp, const PTR rp)
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{
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int r;
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const Sym *left = *(const Sym **) lp;
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const Sym *right = *(const Sym **) rp;
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if (left->file && right->file)
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{
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r = filename_cmp (left->file->name, right->file->name);
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if (r)
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return r;
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if (left->line_num != right->line_num)
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return left->line_num - right->line_num;
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}
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if (left->addr < right->addr)
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return -1;
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else if (left->addr > right->addr)
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return 1;
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else
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return 0;
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}
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/* Helper for sorting. Order basic blocks in decreasing number of
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calls, ties are broken in increasing order of line numbers. */
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static int
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cmp_ncalls (const PTR lp, const PTR rp)
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{
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const Sym *left = *(const Sym **) lp;
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const Sym *right = *(const Sym **) rp;
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if (!left)
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return 1;
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else if (!right)
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return -1;
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if (left->ncalls < right->ncalls)
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return 1;
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else if (left->ncalls > right->ncalls)
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return -1;
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return left->line_num - right->line_num;
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}
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/* Skip over variable length string. */
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static void
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fskip_string (FILE *fp)
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{
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int ch;
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while ((ch = fgetc (fp)) != EOF)
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{
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if (ch == '\0')
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break;
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}
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}
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/* Read a basic-block record from file IFP. FILENAME is the name
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of file IFP and is provided for formatting error-messages only. */
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void
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bb_read_rec (FILE *ifp, const char *filename)
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{
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unsigned int nblocks, b;
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bfd_vma addr, ncalls;
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Sym *sym;
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if (gmon_io_read_32 (ifp, &nblocks))
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{
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fprintf (stderr, _("%s: %s: unexpected end of file\n"),
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whoami, filename);
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done (1);
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}
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nblocks = bfd_get_32 (core_bfd, (bfd_byte *) & nblocks);
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if (gmon_file_version == 0)
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fskip_string (ifp);
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for (b = 0; b < nblocks; ++b)
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{
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if (gmon_file_version == 0)
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{
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int line_num;
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/* Version 0 had lots of extra stuff that we don't
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care about anymore. */
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if ((fread (&ncalls, sizeof (ncalls), 1, ifp) != 1)
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|| (fread (&addr, sizeof (addr), 1, ifp) != 1)
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|| (fskip_string (ifp), false)
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|| (fskip_string (ifp), false)
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|| (fread (&line_num, sizeof (line_num), 1, ifp) != 1))
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{
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perror (filename);
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done (1);
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}
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}
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else if (gmon_io_read_vma (ifp, &addr)
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|| gmon_io_read_vma (ifp, &ncalls))
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{
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perror (filename);
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done (1);
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}
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/* Basic-block execution counts are meaningful only if we're
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profiling at the line-by-line level: */
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if (line_granularity)
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{
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sym = sym_lookup (&symtab, addr);
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if (sym)
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{
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int i;
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DBG (BBDEBUG,
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printf ("[bb_read_rec] 0x%lx->0x%lx (%s:%d) cnt=%lu\n",
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(unsigned long) addr, (unsigned long) sym->addr,
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sym->name, sym->line_num, (unsigned long) ncalls));
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for (i = 0; i < NBBS; i++)
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{
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if (! sym->bb_addr[i] || sym->bb_addr[i] == addr)
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{
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sym->bb_addr[i] = addr;
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sym->bb_calls[i] += ncalls;
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break;
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}
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}
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}
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}
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else
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{
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static bool user_warned = false;
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if (!user_warned)
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{
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user_warned = true;
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fprintf (stderr,
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_("%s: warning: ignoring basic-block exec counts (use -l or --line)\n"),
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whoami);
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}
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}
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}
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return;
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}
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/* Write all basic-blocks with non-zero counts to file OFP. FILENAME
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is the name of OFP and is provided for producing error-messages
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only. */
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void
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bb_write_blocks (FILE *ofp, const char *filename)
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{
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unsigned int nblocks = 0;
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Sym *sym;
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int i;
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/* Count how many non-zero blocks with have: */
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for (sym = symtab.base; sym < symtab.limit; ++sym)
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{
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for (i = 0; i < NBBS && sym->bb_addr[i]; i++)
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;
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nblocks += i;
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}
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/* Write header: */
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if (gmon_io_write_8 (ofp, GMON_TAG_BB_COUNT)
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|| gmon_io_write_32 (ofp, nblocks))
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{
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perror (filename);
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done (1);
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}
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/* Write counts: */
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for (sym = symtab.base; sym < symtab.limit; ++sym)
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{
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for (i = 0; i < NBBS && sym->bb_addr[i]; i++)
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{
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if (gmon_io_write_vma (ofp, sym->bb_addr[i])
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|| gmon_io_write_vma (ofp, (bfd_vma) sym->bb_calls[i]))
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{
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perror (filename);
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done (1);
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}
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}
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}
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}
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/* Output basic-block statistics in a format that is easily parseable.
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Current the format is:
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<filename>:<line-number>: (<function-name>:<bb-addr): <ncalls> */
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void
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print_exec_counts (void)
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{
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Sym **sorted_bbs, *sym;
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unsigned int i, j, len;
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if (first_output)
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first_output = false;
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else
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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]));
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len = 0;
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for (sym = symtab.base; sym < symtab.limit; ++sym)
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{
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/* Accept symbol if it's in the INCL_EXEC table
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or there is no INCL_EXEC table
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and it does not appear in the EXCL_EXEC table. */
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if (sym_lookup (&syms[INCL_EXEC], sym->addr)
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|| (syms[INCL_EXEC].len == 0
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&& !sym_lookup (&syms[EXCL_EXEC], sym->addr)))
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{
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sorted_bbs[len++] = sym;
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}
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}
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qsort (sorted_bbs, len, sizeof (sorted_bbs[0]), cmp_bb);
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/* Output basic-blocks: */
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for (i = 0; i < len; ++i)
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{
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sym = sorted_bbs [i];
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if (sym->ncalls > 0 || ! ignore_zeros)
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{
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/* FIXME: This only works if bfd_vma is unsigned long. */
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printf (_("%s:%d: (%s:0x%lx) %lu executions\n"),
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sym->file ? sym->file->name : _("<unknown>"), sym->line_num,
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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 ++)
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{
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if (sym->bb_calls[j] > 0 || ! ignore_zeros)
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{
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/* FIXME: This only works if bfd_vma is unsigned long. */
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printf (_("%s:%d: (%s:0x%lx) %lu executions\n"),
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sym->file ? sym->file->name : _("<unknown>"), sym->line_num,
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sym->name, (unsigned long) sym->bb_addr[j],
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sym->bb_calls[j]);
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}
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}
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}
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free (sorted_bbs);
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}
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/* Helper for bb_annotated_source: format annotation containing
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number of line executions. Depends on being called on each
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line of a file in sequential order.
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Global variable bb_annotate_all_lines enables execution count
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compression (counts are suppressed if identical to the last one)
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and prints counts on all executed lines. Otherwise, print
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all basic-block execution counts exactly once on the line
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that starts the basic-block. */
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static void
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annotate_with_count (char *buf, unsigned int width, int line_num, PTR arg)
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{
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Source_File *sf = (Source_File *) arg;
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Sym *b;
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unsigned int i;
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static unsigned long last_count;
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unsigned long last_print = (unsigned long) -1;
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b = NULL;
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if (line_num <= sf->num_lines)
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b = (Sym *) sf->line[line_num - 1];
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if (!b)
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{
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for (i = 0; i < width; i++)
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buf[i] = ' ';
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buf[width] = '\0';
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}
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else
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{
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char tmpbuf[NBBS * 30];
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char *p;
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unsigned long ncalls;
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int ncalls_set;
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unsigned int len;
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++num_executable_lines;
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p = tmpbuf;
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*p = '\0';
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ncalls = 0;
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ncalls_set = 0;
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/* If this is a function entry point, label the line no matter what.
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Otherwise, we're in the middle of a function, so check to see
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if the first basic-block address is larger than the starting
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address of the line. If so, then this line begins with a
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a portion of the previous basic-block, so print that prior
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execution count (if bb_annotate_all_lines is set). */
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if (b->is_func)
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{
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sprintf (p, "%lu", b->ncalls);
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p += strlen (p);
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last_count = b->ncalls;
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last_print = last_count;
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ncalls = b->ncalls;
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ncalls_set = 1;
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}
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else if (bb_annotate_all_lines
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&& b->bb_addr[0] && b->bb_addr[0] > b->addr)
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{
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sprintf (p, "%lu", last_count);
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p += strlen (p);
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last_print = last_count;
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ncalls = last_count;
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ncalls_set = 1;
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}
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/* Loop through all of this line's basic-blocks. For each one,
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update last_count, then compress sequential identical counts
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(if bb_annotate_all_lines) and print the execution count. */
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for (i = 0; i < NBBS && b->bb_addr[i]; i++)
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{
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last_count = b->bb_calls[i];
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if (! ncalls_set)
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{
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ncalls = 0;
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ncalls_set = 1;
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}
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ncalls += last_count;
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if (bb_annotate_all_lines && last_count == last_print)
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continue;
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if (p > tmpbuf)
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*p++ = ',';
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sprintf (p, "%lu", last_count);
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p += strlen (p);
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last_print = last_count;
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}
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/* We're done. If nothing has been printed on this line,
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print the last execution count (bb_annotate_all_lines),
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which could be from either a previous line (if there were
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no BBs on this line), or from this line (if all our BB
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counts were compressed out because they were identical). */
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if (bb_annotate_all_lines && p == tmpbuf)
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{
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sprintf (p, "%lu", last_count);
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p += strlen (p);
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ncalls = last_count;
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ncalls_set = 1;
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}
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if (! ncalls_set)
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{
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unsigned int c;
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for (c = 0; c < width; c++)
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buf[c] = ' ';
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buf[width] = '\0';
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return;
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}
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++num_lines_executed;
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if (ncalls < bb_min_calls)
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{
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strcpy (tmpbuf, "#####");
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p = tmpbuf + 5;
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}
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strcpy (p, " -> ");
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p += 4;
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len = p - tmpbuf;
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if (len >= width)
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{
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strncpy (buf, tmpbuf, width);
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buf[width] = '\0';
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}
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else
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{
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unsigned int c;
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strcpy (buf + width - len, tmpbuf);
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for (c = 0; c < width - len; ++c)
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buf[c] = ' ';
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}
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}
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}
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/* Annotate the files named in SOURCE_FILES with basic-block statistics
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(execution counts). After each source files, a few statistics
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regarding that source file are printed. */
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void
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print_annotated_source (void)
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{
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Sym *sym, *line_stats, *new_line;
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Source_File *sf;
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int i, table_len;
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FILE *ofp;
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/* Find maximum line number for each source file that user is
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interested in: */
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for (sym = symtab.base; sym < symtab.limit; ++sym)
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{
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/* Accept symbol if it's file is known, its line number is
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bigger than anything we have seen for that file so far and
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if it's in the INCL_ANNO table or there is no INCL_ANNO
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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
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&& (sym_lookup (&syms[INCL_ANNO], sym->addr)
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|| (syms[INCL_ANNO].len == 0
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&& !sym_lookup (&syms[EXCL_ANNO], sym->addr))))
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{
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sym->file->num_lines = sym->line_num;
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}
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}
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/* Allocate line descriptors: */
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for (sf = first_src_file; sf; sf = sf->next)
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{
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if (sf->num_lines > 0)
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{
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sf->line = (void **) xmalloc (sf->num_lines * sizeof (sf->line[0]));
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memset (sf->line, 0, sf->num_lines * sizeof (sf->line[0]));
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}
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}
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/* Count executions per line: */
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for (sym = symtab.base; sym < symtab.limit; ++sym)
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{
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if (sym->file && sym->file->num_lines
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&& (sym_lookup (&syms[INCL_ANNO], sym->addr)
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|| (syms[INCL_ANNO].len == 0
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&& !sym_lookup (&syms[EXCL_ANNO], sym->addr))))
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{
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sym->file->ncalls += sym->ncalls;
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line_stats = (Sym *) sym->file->line[sym->line_num - 1];
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if (!line_stats)
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{
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/* Common case has at most one basic-block per source line: */
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sym->file->line[sym->line_num - 1] = sym;
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}
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else if (!line_stats->addr)
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{
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/* sym is the 3rd .. nth basic block for this line: */
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line_stats->ncalls += sym->ncalls;
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}
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else
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{
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/* sym is the second basic block for this line. */
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new_line = (Sym *) xmalloc (sizeof (*new_line));
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*new_line = *line_stats;
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new_line->addr = 0;
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new_line->ncalls += sym->ncalls;
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sym->file->line[sym->line_num - 1] = new_line;
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}
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}
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}
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/* Plod over source files, annotating them: */
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for (sf = first_src_file; sf; sf = sf->next)
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{
|
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if (!sf->num_lines || (ignore_zeros && sf->ncalls == 0))
|
||
continue;
|
||
|
||
num_executable_lines = num_lines_executed = 0;
|
||
|
||
ofp = annotate_source (sf, 16, annotate_with_count, sf);
|
||
if (!ofp)
|
||
continue;
|
||
|
||
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: */
|
||
qsort (sf->line, sf->num_lines, sizeof (sf->line[0]), cmp_ncalls);
|
||
table_len = bb_table_length;
|
||
|
||
if (table_len > sf->num_lines)
|
||
table_len = sf->num_lines;
|
||
|
||
for (i = 0; i < table_len; ++i)
|
||
{
|
||
sym = (Sym *) sf->line[i];
|
||
|
||
if (!sym || sym->ncalls == 0)
|
||
break;
|
||
|
||
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);
|
||
|
||
if (ofp != stdout)
|
||
fclose (ofp);
|
||
}
|
||
}
|