2 * Basic-block level related code: reading/writing of basic-block info
3 * to/from gmon.out; computing and formatting of basic-block related
8 #include "basic_blocks.h"
13 #include "libiberty.h"
19 * Default option values:
21 bool bb_annotate_all_lines = FALSE;
23 int bb_table_length = 10;
26 * Variables used to compute annotated source listing stats:
28 static long num_executable_lines;
29 static long num_lines_executed;
33 * Helper for sorting. Compares two basic-blocks and returns result
34 * such that sorting will be increasing according to filename, line
35 * number, and basic-block address (in that order).
38 DEFUN (cmp_bb, (lp, rp), const void *lp AND const void *rp)
41 const Sym *left = *(const Sym **) lp;
42 const Sym *right = *(const Sym **) rp;
44 if (left->file && right->file)
46 r = strcmp (left->file->name, right->file->name);
52 if (left->line_num != right->line_num)
54 return left->line_num - right->line_num;
58 if (left->addr < right->addr)
62 else if (left->addr > right->addr)
74 * Helper for sorting. Order basic blocks in decreasing number of
75 * calls, ties are broken in increasing order of line numbers.
78 DEFUN (cmp_ncalls, (lp, rp), const void *lp AND const void *rp)
80 const Sym *left = *(const Sym **) lp;
81 const Sym *right = *(const Sym **) rp;
92 if (right->ncalls != left->ncalls)
94 return right->ncalls - left->ncalls;
97 return left->line_num - right->line_num;
102 * Skip over variable length string.
105 DEFUN (fskip_string, (fp), FILE * fp)
109 while ((ch = fgetc (fp)) != EOF)
120 * Read a basic-block record from file IFP. FILENAME is the name
121 * of file IFP and is provided for formatting error-messages only.
124 DEFUN (bb_read_rec, (ifp, filename), FILE * ifp AND const char *filename)
131 if (fread (&nblocks, sizeof (nblocks), 1, ifp) != 1)
133 fprintf (stderr, "%s: %s: unexpected end of file\n", whoami, filename);
137 nblocks = bfd_get_32 (core_bfd, (bfd_byte *) & nblocks);
138 if (gmon_file_version == 0)
143 for (b = 0; b < nblocks; ++b)
145 if (gmon_file_version == 0)
149 * Version 0 had lots of extra stuff that we don't
150 * care about anymore.
152 if ((fread (&ncalls, sizeof (ncalls), 1, ifp) != 1)
153 || (fread (&addr, sizeof (addr), 1, ifp) != 1)
154 || (fskip_string (ifp), FALSE)
155 || (fskip_string (ifp), FALSE)
156 || (fread (&line_num, sizeof (line_num), 1, ifp) != 1))
164 if (fread (&addr, sizeof (addr), 1, ifp) != 1
165 || fread (&ncalls, sizeof (ncalls), 1, ifp) != 1)
173 * Basic-block execution counts are meaningful only if we're
174 * profiling at the line-by-line level:
176 if (line_granularity)
179 /* convert from target to host endianness: */
181 addr = get_vma (core_bfd, (bfd_byte *) & addr);
183 sym = sym_lookup (&symtab, addr);
184 sym->is_bb_head = TRUE;
185 sym->ncalls += bfd_get_32 (core_bfd, (bfd_byte *) & ncalls);
187 DBG (BBDEBUG, printf ("[bb_read_rec] 0x%lx->0x%lx (%s) cnt=%d\n",
188 addr, sym->addr, sym->name, sym->ncalls));
192 static bool user_warned = FALSE;
198 "%s: warning: ignoring basic-block exec counts (use -l or --line)\n",
208 * Write all basic-blocks with non-zero counts to file OFP. FILENAME
209 * is the name of OFP and is provided for producing error-messages
213 DEFUN (bb_write_blocks, (ofp, filename), FILE * ofp AND const char *filename)
215 const unsigned char tag = GMON_TAG_BB_COUNT;
221 /* count how many non-zero blocks with have: */
223 for (sym = symtab.base; sym < symtab.limit; ++sym)
232 bfd_put_32 (core_bfd, nblocks, (bfd_byte *) & nblocks);
233 if (fwrite (&tag, sizeof (tag), 1, ofp) != 1
234 || fwrite (&nblocks, sizeof (nblocks), 1, ofp) != 1)
241 for (sym = symtab.base; sym < symtab.limit; ++sym)
243 if (sym->ncalls == 0)
248 put_vma (core_bfd, sym->addr, (bfd_byte *) & addr);
249 bfd_put_32 (core_bfd, sym->ncalls, (bfd_byte *) & ncalls);
251 if (fwrite (&addr, sizeof (addr), 1, ofp) != 1
252 || fwrite (&ncalls, sizeof (ncalls), 1, ofp) != 1)
262 * Output basic-block statistics in a format that is easily parseable.
263 * Current the format is:
265 * <filename>:<line-number>: (<function-name>:<bb-addr): <ncalls>
268 DEFUN_VOID (print_exec_counts)
270 Sym **sorted_bbs, *sym;
275 first_output = FALSE;
282 /* sort basic-blocks according to function name and line number: */
284 sorted_bbs = (Sym **) xmalloc (symtab.len * sizeof (sorted_bbs[0]));
286 for (sym = symtab.base; sym < symtab.limit; ++sym)
289 * Accept symbol if it's the start of a basic-block and it is
290 * called at least bb_min_calls times and if it's in the
291 * INCL_EXEC table or there is no INCL_EXEC table and it does
292 * not appear in the EXCL_EXEC table.
294 if (sym->is_bb_head && sym->ncalls >= bb_min_calls
295 && (sym_lookup (&syms[INCL_EXEC], sym->addr)
296 || (syms[INCL_EXEC].len == 0
297 && !sym_lookup (&syms[EXCL_EXEC], sym->addr))))
299 sorted_bbs[len++] = sym;
302 qsort (sorted_bbs, len, sizeof (sorted_bbs[0]), cmp_bb);
304 /* output basic-blocks: */
306 for (i = 0; i < len; ++i)
309 printf ("%s:%d: (%s:0x%lx) %d executions\n",
310 sym->file ? sym->file->name : "<unknown>", sym->line_num,
311 sym->name, sym->addr, sym->ncalls);
318 * Helper for bb_annotated_source: format annotation containing
319 * number of line executions.
322 DEFUN (annotate_with_count, (buf, width, line_num, arg),
323 char *buf AND int width AND int line_num AND void *arg)
325 Source_File *sf = arg;
328 static long last_count;
336 if (line_num <= sf->num_lines)
338 b = sf->line[line_num - 1];
346 ++num_executable_lines;
351 ++num_lines_executed;
353 if (cnt < 0 && bb_annotate_all_lines)
360 strcpy (buf, "\t\t");
362 else if (cnt < bb_min_calls)
364 strcpy (buf, " ##### -> ");
368 sprintf (buf, "%12ld -> ", cnt);
375 * Annotate the files named in SOURCE_FILES with basic-block statistics
376 * (execution counts). After each source files, a few statistics
377 * regarding that source file are printed.
380 DEFUN_VOID (print_annotated_source)
382 Sym *sym, *line_stats, *new_line;
388 * Find maximum line number for each source file that user is
391 for (sym = symtab.base; sym < symtab.limit; ++sym)
394 * Accept symbol if it's file is known, its line number is
395 * bigger than anything we have seen for that file so far and
396 * if it's in the INCL_ANNO table or there is no INCL_ANNO
397 * table and it does not appear in the EXCL_ANNO table.
399 if (sym->file && sym->line_num > sym->file->num_lines
400 && (sym_lookup (&syms[INCL_ANNO], sym->addr)
401 || (syms[INCL_ANNO].len == 0
402 && !sym_lookup (&syms[EXCL_ANNO], sym->addr))))
404 sym->file->num_lines = sym->line_num;
408 /* allocate line descriptors: */
410 for (sf = first_src_file; sf; sf = sf->next)
412 if (sf->num_lines > 0)
414 sf->line = (void *) xmalloc (sf->num_lines * sizeof (sf->line[0]));
415 memset (sf->line, 0, sf->num_lines * sizeof (sf->line[0]));
419 /* count executions per line: */
421 for (sym = symtab.base; sym < symtab.limit; ++sym)
423 if (sym->is_bb_head && sym->file && sym->file->num_lines
424 && (sym_lookup (&syms[INCL_ANNO], sym->addr)
425 || (syms[INCL_ANNO].len == 0
426 && !sym_lookup (&syms[EXCL_ANNO], sym->addr))))
428 sym->file->ncalls += sym->ncalls;
429 line_stats = sym->file->line[sym->line_num - 1];
432 /* common case has at most one basic-block per source line: */
433 sym->file->line[sym->line_num - 1] = sym;
435 else if (!line_stats->addr)
437 /* sym is the 3rd .. nth basic block for this line: */
438 line_stats->ncalls += sym->ncalls;
442 /* sym is the second basic block for this line */
443 new_line = (Sym *) xmalloc (sizeof (*new_line));
444 *new_line = *line_stats;
446 new_line->ncalls += sym->ncalls;
447 sym->file->line[sym->line_num - 1] = new_line;
452 /* plod over source files, annotating them: */
454 for (sf = first_src_file; sf; sf = sf->next)
456 if (!sf->num_lines || (ignore_zeros && sf->ncalls == 0))
461 num_executable_lines = num_lines_executed = 0;
462 ofp = annotate_source (sf, 16, annotate_with_count, sf);
468 if (bb_table_length > 0)
470 fprintf (ofp, "\n\nTop %d Lines:\n\n Line Count\n\n",
473 /* abuse line arrays---it's not needed anymore: */
474 qsort (sf->line, sf->num_lines, sizeof (sf->line[0]), cmp_ncalls);
475 table_len = bb_table_length;
476 if (table_len > sf->num_lines)
478 table_len = sf->num_lines;
480 for (i = 0; i < table_len; ++i)
483 if (!sym || sym->ncalls <= 0)
487 fprintf (ofp, "%9d %10d\n", sym->line_num, sym->ncalls);
494 fprintf (ofp, "\nExecution Summary:\n\n");
495 fprintf (ofp, "%9ld Executable lines in this file\n",
496 num_executable_lines);
497 fprintf (ofp, "%9ld Lines executed\n", num_lines_executed);
498 fprintf (ofp, "%9.2f Percent of the file executed\n",
500 ? 100.0 * num_lines_executed / (double) num_executable_lines
502 fprintf (ofp, "\n%9d Total number of line executions\n", sf->ncalls);
503 fprintf (ofp, "%9.2f Average executions per line\n",
505 ? sf->ncalls / (double) num_executable_lines