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- /*
- * Basic-block level related code: reading/writing of basic-block info
- * to/from gmon.out; computing and formatting of basic-block related
- * statistics.
- */
- #include <stdio.h>
- #include <unistd.h>
- #include "basic_blocks.h"
- #include "core.h"
- #include "gmon_io.h"
- #include "gmon_out.h"
- #include "gprof.h"
- #include "libiberty.h"
- #include "source.h"
- #include "sym_ids.h"
-
-
- /*
- * Default option values:
- */
- bool bb_annotate_all_lines = FALSE;
- int bb_min_calls = 1;
- int bb_table_length = 10;
-
- /*
- * Variables used to compute annotated source listing stats:
- */
- static long num_executable_lines;
- static long num_lines_executed;
-
-
- /*
- * Helper for sorting. Compares two basic-blocks and returns result
- * such that sorting will be increasing according to filename, line
- * number, and basic-block address (in that order).
- */
- static int
- DEFUN (cmp_bb, (lp, rp), const void *lp AND const void *rp)
- {
- 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);
- if (r)
- {
- return r;
- }
-
- if (left->line_num != right->line_num)
- {
- return left->line_num - right->line_num;
- }
- }
-
- if (left->addr < right->addr)
- {
- return -1;
- }
- else if (left->addr > right->addr)
- {
- return 1;
- }
- else
- {
- return 0;
- }
- }
-
-
- /*
- * Helper for sorting. Order basic blocks in decreasing number of
- * calls, ties are broken in increasing order of line numbers.
- */
- static int
- DEFUN (cmp_ncalls, (lp, rp), const void *lp AND const void *rp)
- {
- const Sym *left = *(const Sym **) lp;
- const Sym *right = *(const Sym **) rp;
-
- if (!left)
- {
- return 1;
- }
- else if (!right)
- {
- return -1;
- }
-
- if (right->ncalls != left->ncalls)
- {
- return right->ncalls - left->ncalls;
- }
-
- return left->line_num - right->line_num;
- }
-
-
- /*
- * Skip over variable length string.
- */
- static void
- DEFUN (fskip_string, (fp), FILE * fp)
- {
- int ch;
-
- while ((ch = fgetc (fp)) != EOF)
- {
- if (ch == '\0')
- {
- break;
- }
- }
- }
-
-
- /*
- * Read a basic-block record from file IFP. FILENAME is the name
- * of file IFP and is provided for formatting error-messages only.
- */
- void
- DEFUN (bb_read_rec, (ifp, filename), FILE * ifp AND const char *filename)
- {
- int nblocks, b;
- bfd_vma addr;
- long ncalls;
- Sym *sym;
-
- if (fread (&nblocks, sizeof (nblocks), 1, ifp) != 1)
- {
- fprintf (stderr, "%s: %s: unexpected end of file\n", whoami, filename);
- done (1);
- }
-
- nblocks = bfd_get_32 (core_bfd, (bfd_byte *) & nblocks);
- if (gmon_file_version == 0)
- {
- fskip_string (ifp);
- }
-
- 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.
- */
- if ((fread (&ncalls, sizeof (ncalls), 1, ifp) != 1)
- || (fread (&addr, sizeof (addr), 1, ifp) != 1)
- || (fskip_string (ifp), FALSE)
- || (fskip_string (ifp), FALSE)
- || (fread (&line_num, sizeof (line_num), 1, ifp) != 1))
- {
- perror (filename);
- done (1);
- }
- }
- else
- {
- if (fread (&addr, sizeof (addr), 1, ifp) != 1
- || fread (&ncalls, sizeof (ncalls), 1, ifp) != 1)
- {
- perror (filename);
- done (1);
- }
- }
-
- /*
- * Basic-block execution counts are meaningful only if we're
- * profiling at the line-by-line level:
- */
- if (line_granularity)
- {
-
- /* convert from target to host endianness: */
-
- addr = get_vma (core_bfd, (bfd_byte *) & addr);
-
- sym = sym_lookup (&symtab, addr);
- sym->is_bb_head = TRUE;
- sym->ncalls += bfd_get_32 (core_bfd, (bfd_byte *) & ncalls);
-
- DBG (BBDEBUG, printf ("[bb_read_rec] 0x%lx->0x%lx (%s) cnt=%d\n",
- addr, sym->addr, sym->name, sym->ncalls));
- }
- else
- {
- static bool user_warned = FALSE;
-
- if (!user_warned)
- {
- user_warned = TRUE;
- fprintf (stderr,
- "%s: warning: ignoring basic-block exec counts (use -l or --line)\n",
- 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.
- */
- void
- DEFUN (bb_write_blocks, (ofp, filename), FILE * ofp AND const char *filename)
- {
- const unsigned char tag = GMON_TAG_BB_COUNT;
- int nblocks = 0;
- bfd_vma addr;
- long ncalls;
- Sym *sym;
-
- /* count how many non-zero blocks with have: */
-
- for (sym = symtab.base; sym < symtab.limit; ++sym)
- {
- if (sym->ncalls > 0)
- {
- ++nblocks;
- }
- }
-
- /* write header: */
- bfd_put_32 (core_bfd, nblocks, (bfd_byte *) & nblocks);
- if (fwrite (&tag, sizeof (tag), 1, ofp) != 1
- || fwrite (&nblocks, sizeof (nblocks), 1, ofp) != 1)
- {
- perror (filename);
- done (1);
- }
-
- /* write counts: */
- for (sym = symtab.base; sym < symtab.limit; ++sym)
- {
- if (sym->ncalls == 0)
- {
- continue;
- }
-
- put_vma (core_bfd, sym->addr, (bfd_byte *) & addr);
- bfd_put_32 (core_bfd, sym->ncalls, (bfd_byte *) & ncalls);
-
- if (fwrite (&addr, sizeof (addr), 1, ofp) != 1
- || fwrite (&ncalls, sizeof (ncalls), 1, ofp) != 1)
- {
- 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>
- */
- void
- DEFUN_VOID (print_exec_counts)
- {
- Sym **sorted_bbs, *sym;
- int i, len;
-
- if (first_output)
- {
- first_output = FALSE;
- }
- else
- {
- printf ("\f\n");
- }
-
- /* sort basic-blocks according to function name and line number: */
-
- sorted_bbs = (Sym **) xmalloc (symtab.len * sizeof (sorted_bbs[0]));
- len = 0;
- for (sym = symtab.base; sym < symtab.limit; ++sym)
- {
- /*
- * Accept symbol if it's the start of a basic-block and it is
- * called at least bb_min_calls times and 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.
- */
- if (sym->is_bb_head && sym->ncalls >= bb_min_calls
- && (sym_lookup (&syms[INCL_EXEC], sym->addr)
- || (syms[INCL_EXEC].len == 0
- && !sym_lookup (&syms[EXCL_EXEC], sym->addr))))
- {
- sorted_bbs[len++] = sym;
- }
- }
- qsort (sorted_bbs, len, sizeof (sorted_bbs[0]), cmp_bb);
-
- /* output basic-blocks: */
-
- for (i = 0; i < len; ++i)
- {
- sym = sorted_bbs[i];
- printf ("%s:%d: (%s:0x%lx) %d executions\n",
- sym->file ? sym->file->name : "<unknown>", sym->line_num,
- sym->name, sym->addr, sym->ncalls);
- }
- free (sorted_bbs);
- }
-
-
- /*
- * Helper for bb_annotated_source: format annotation containing
- * number of line executions.
- */
- static void
- DEFUN (annotate_with_count, (buf, width, line_num, arg),
- char *buf AND int width AND int line_num AND void *arg)
- {
- Source_File *sf = arg;
- Sym *b;
- long cnt;
- static long last_count;
-
- if (line_num == 1)
- {
- last_count = -1;
- }
-
- b = 0;
- if (line_num <= sf->num_lines)
- {
- b = sf->line[line_num - 1];
- }
- if (!b)
- {
- cnt = -1;
- }
- else
- {
- ++num_executable_lines;
- cnt = b->ncalls;
- }
- if (cnt > 0)
- {
- ++num_lines_executed;
- }
- if (cnt < 0 && bb_annotate_all_lines)
- {
- cnt = last_count;
- }
-
- if (cnt < 0)
- {
- strcpy (buf, "\t\t");
- }
- else if (cnt < bb_min_calls)
- {
- strcpy (buf, " ##### -> ");
- }
- else
- {
- sprintf (buf, "%12ld -> ", cnt);
- }
- last_count = cnt;
- }
-
-
- /*
- * 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.
- */
- void
- DEFUN_VOID (print_annotated_source)
- {
- 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:
- */
- 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.
- */
- 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: */
-
- 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: */
-
- for (sym = symtab.base; sym < symtab.limit; ++sym)
- {
- if (sym->is_bb_head && 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];
- if (!line_stats)
- {
- /* common case has at most one basic-block per source line: */
- sym->file->line[sym->line_num - 1] = sym;
- }
- else if (!line_stats->addr)
- {
- /* sym is the 3rd .. nth basic block for this line: */
- line_stats->ncalls += sym->ncalls;
- }
- else
- {
- /* sym is the second basic block for this line */
- 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: */
-
- for (sf = first_src_file; sf; sf = sf->next)
- {
- 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 = sf->line[i];
- if (!sym || sym->ncalls <= 0)
- {
- break;
- }
- fprintf (ofp, "%9d %10d\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%9d Total number of line executions\n", sf->ncalls);
- fprintf (ofp, "%9.2f Average executions per line\n",
- num_executable_lines
- ? sf->ncalls / (double) num_executable_lines
- : 0.0);
- if (ofp != stdout)
- {
- fclose (ofp);
- }
- }
- }
-