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;
22 unsigned long bb_min_calls = 1;
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 symbols and returns result
34 * such that sorting will be increasing according to filename, line
35 * number, and address (in that order).
39 DEFUN (cmp_bb, (lp, rp), const void *lp AND const void *rp)
42 const Sym *left = *(const Sym **) lp;
43 const Sym *right = *(const Sym **) rp;
45 if (left->file && right->file)
47 r = strcmp (left->file->name, right->file->name);
53 if (left->line_num != right->line_num)
55 return left->line_num - right->line_num;
59 if (left->addr < right->addr)
63 else if (left->addr > right->addr)
75 * Helper for sorting. Order basic blocks in decreasing number of
76 * calls, ties are broken in increasing order of line numbers.
79 DEFUN (cmp_ncalls, (lp, rp), const void *lp AND const void *rp)
81 const Sym *left = *(const Sym **) lp;
82 const Sym *right = *(const Sym **) rp;
93 if (left->ncalls < right->ncalls)
95 else if (left->ncalls > right->ncalls)
98 return left->line_num - right->line_num;
103 * Skip over variable length string.
106 DEFUN (fskip_string, (fp), FILE * fp)
110 while ((ch = fgetc (fp)) != EOF)
121 * Read a basic-block record from file IFP. FILENAME is the name
122 * of file IFP and is provided for formatting error-messages only.
125 DEFUN (bb_read_rec, (ifp, filename), FILE * ifp AND const char *filename)
129 unsigned long ncalls;
132 if (fread (&nblocks, sizeof (nblocks), 1, ifp) != 1)
134 fprintf (stderr, _("%s: %s: unexpected end of file\n"), whoami, filename);
138 nblocks = bfd_get_32 (core_bfd, (bfd_byte *) & nblocks);
139 if (gmon_file_version == 0)
144 for (b = 0; b < nblocks; ++b)
146 if (gmon_file_version == 0)
150 * Version 0 had lots of extra stuff that we don't
151 * care about anymore.
153 if ((fread (&ncalls, sizeof (ncalls), 1, ifp) != 1)
154 || (fread (&addr, sizeof (addr), 1, ifp) != 1)
155 || (fskip_string (ifp), FALSE)
156 || (fskip_string (ifp), FALSE)
157 || (fread (&line_num, sizeof (line_num), 1, ifp) != 1))
165 if (fread (&addr, sizeof (addr), 1, ifp) != 1
166 || fread (&ncalls, sizeof (ncalls), 1, ifp) != 1)
174 * Basic-block execution counts are meaningful only if we're
175 * profiling at the line-by-line level:
177 if (line_granularity)
180 /* convert from target to host endianness: */
182 addr = get_vma (core_bfd, (bfd_byte *) & addr);
183 ncalls = bfd_get_32 (core_bfd, (bfd_byte *) &ncalls);
185 sym = sym_lookup (&symtab, addr);
192 printf ("[bb_read_rec] 0x%lx->0x%lx (%s:%d) cnt=%lu\n",
193 addr, sym->addr, sym->name, sym->line_num, ncalls));
195 for (i = 0; i < NBBS; i++)
197 if (! sym->bb_addr[i] || sym->bb_addr[i] == addr)
199 sym->bb_addr[i] = addr;
200 sym->bb_calls[i] += ncalls;
208 static bool user_warned = FALSE;
214 _("%s: warning: ignoring basic-block exec counts (use -l or --line)\n"),
224 * Write all basic-blocks with non-zero counts to file OFP. FILENAME
225 * is the name of OFP and is provided for producing error-messages
229 DEFUN (bb_write_blocks, (ofp, filename), FILE * ofp AND const char *filename)
231 const unsigned char tag = GMON_TAG_BB_COUNT;
234 unsigned long ncalls;
238 /* count how many non-zero blocks with have: */
240 for (sym = symtab.base; sym < symtab.limit; ++sym)
242 for (i = 0; i < NBBS && sym->bb_addr[i]; i++)
248 bfd_put_32 (core_bfd, nblocks, (bfd_byte *) & nblocks);
249 if (fwrite (&tag, sizeof (tag), 1, ofp) != 1
250 || fwrite (&nblocks, sizeof (nblocks), 1, ofp) != 1)
257 for (sym = symtab.base; sym < symtab.limit; ++sym)
259 for (i = 0; i < NBBS && sym->bb_addr[i]; i++)
261 put_vma (core_bfd, sym->bb_addr[i], (bfd_byte *) & addr);
262 bfd_put_32 (core_bfd, sym->bb_calls[i], (bfd_byte *) & ncalls);
264 if (fwrite (&addr, sizeof (addr), 1, ofp) != 1
265 || fwrite (&ncalls, sizeof (ncalls), 1, ofp) != 1)
276 * Output basic-block statistics in a format that is easily parseable.
277 * Current the format is:
279 * <filename>:<line-number>: (<function-name>:<bb-addr): <ncalls>
282 DEFUN_VOID (print_exec_counts)
284 Sym **sorted_bbs, *sym;
289 first_output = FALSE;
296 /* sort basic-blocks according to function name and line number: */
298 sorted_bbs = (Sym **) xmalloc (symtab.len * sizeof (sorted_bbs[0]));
300 for (sym = symtab.base; sym < symtab.limit; ++sym)
303 * Accept symbol if it's in the INCL_EXEC table
304 * or there is no INCL_EXEC table
305 * and it does not appear in the EXCL_EXEC table.
307 if (sym_lookup (&syms[INCL_EXEC], sym->addr)
308 || (syms[INCL_EXEC].len == 0
309 && !sym_lookup (&syms[EXCL_EXEC], sym->addr)))
311 sorted_bbs[len++] = sym;
314 qsort (sorted_bbs, len, sizeof (sorted_bbs[0]), cmp_bb);
316 /* output basic-blocks: */
318 for (i = 0; i < len; ++i)
320 if (sym->ncalls > 0 || ! ignore_zeros)
322 printf (_("%s:%d: (%s:0x%lx) %lu executions\n"),
323 sym->file ? sym->file->name : _("<unknown>"), sym->line_num,
324 sym->name, sym->addr, sym->ncalls);
326 for (j = 0; j < NBBS && sym->bb_addr[j]; j ++)
328 if (sym->bb_calls[j] > 0 || ! ignore_zeros)
330 printf (_("%s:%d: (%s:0x%lx) %lu executions\n"),
331 sym->file ? sym->file->name : _("<unknown>"), sym->line_num,
332 sym->name, sym->bb_addr[j], sym->bb_calls[j]);
340 * Helper for bb_annotated_source: format annotation containing
341 * number of line executions. Depends on being called on each
342 * line of a file in sequential order.
344 * Global variable bb_annotate_all_lines enables execution count
345 * compression (counts are supressed if identical to the last one)
346 * and prints counts on all executed lines. Otherwise, print
347 * all basic-block execution counts exactly once on the line
348 * that starts the basic-block.
352 DEFUN (annotate_with_count, (buf, width, line_num, arg),
353 char *buf AND int width AND int line_num AND void *arg)
355 Source_File *sf = arg;
358 static unsigned long last_count;
359 unsigned long last_print = (unsigned long) -1;
362 if (line_num <= sf->num_lines)
364 b = sf->line[line_num - 1];
368 for (i = 0; i < width; i++)
374 char tmpbuf[NBBS * 30];
376 unsigned long ncalls;
380 ++num_executable_lines;
388 /* If this is a function entry point, label the line no matter what.
389 * Otherwise, we're in the middle of a function, so check to see
390 * if the first basic-block address is larger than the starting
391 * address of the line. If so, then this line begins with a
392 * a portion of the previous basic-block, so print that prior
393 * execution count (if bb_annotate_all_lines is set).
398 sprintf (p, "%lu", b->ncalls);
400 last_count = b->ncalls;
401 last_print = last_count;
405 else if (bb_annotate_all_lines
406 && b->bb_addr[0] && b->bb_addr[0] > b->addr)
408 sprintf (p, "%lu", last_count);
410 last_print = last_count;
415 /* Loop through all of this line's basic-blocks. For each one,
416 * update last_count, then compress sequential identical counts
417 * (if bb_annotate_all_lines) and print the execution count.
420 for (i = 0; i < NBBS && b->bb_addr[i]; i++)
422 last_count = b->bb_calls[i];
428 ncalls += last_count;
430 if (bb_annotate_all_lines && last_count == last_print)
437 sprintf (p, "%lu", last_count);
440 last_print = last_count;
443 /* We're done. If nothing has been printed on this line,
444 * print the last execution count (bb_annotate_all_lines),
445 * which could be from either a previous line (if there were
446 * no BBs on this line), or from this line (if all our BB
447 * counts were compressed out because they were identical).
450 if (bb_annotate_all_lines && p == tmpbuf)
452 sprintf (p, "%lu", last_count);
462 for (c = 0; c < width; c++)
468 ++num_lines_executed;
470 if (ncalls < bb_min_calls)
472 strcpy (tmpbuf, "#####");
482 strncpy (buf, tmpbuf, width);
489 strcpy (buf + width - len, tmpbuf);
490 for (c = 0; c < width - len; ++c)
497 * Annotate the files named in SOURCE_FILES with basic-block statistics
498 * (execution counts). After each source files, a few statistics
499 * regarding that source file are printed.
502 DEFUN_VOID (print_annotated_source)
504 Sym *sym, *line_stats, *new_line;
510 * Find maximum line number for each source file that user is
513 for (sym = symtab.base; sym < symtab.limit; ++sym)
516 * Accept symbol if it's file is known, its line number is
517 * bigger than anything we have seen for that file so far and
518 * if it's in the INCL_ANNO table or there is no INCL_ANNO
519 * table and it does not appear in the EXCL_ANNO table.
521 if (sym->file && sym->line_num > sym->file->num_lines
522 && (sym_lookup (&syms[INCL_ANNO], sym->addr)
523 || (syms[INCL_ANNO].len == 0
524 && !sym_lookup (&syms[EXCL_ANNO], sym->addr))))
526 sym->file->num_lines = sym->line_num;
530 /* allocate line descriptors: */
532 for (sf = first_src_file; sf; sf = sf->next)
534 if (sf->num_lines > 0)
536 sf->line = (void *) xmalloc (sf->num_lines * sizeof (sf->line[0]));
537 memset (sf->line, 0, sf->num_lines * sizeof (sf->line[0]));
541 /* count executions per line: */
543 for (sym = symtab.base; sym < symtab.limit; ++sym)
545 if (sym->file && sym->file->num_lines
546 && (sym_lookup (&syms[INCL_ANNO], sym->addr)
547 || (syms[INCL_ANNO].len == 0
548 && !sym_lookup (&syms[EXCL_ANNO], sym->addr))))
550 sym->file->ncalls += sym->ncalls;
551 line_stats = sym->file->line[sym->line_num - 1];
554 /* common case has at most one basic-block per source line: */
555 sym->file->line[sym->line_num - 1] = sym;
557 else if (!line_stats->addr)
559 /* sym is the 3rd .. nth basic block for this line: */
560 line_stats->ncalls += sym->ncalls;
564 /* sym is the second basic block for this line */
565 new_line = (Sym *) xmalloc (sizeof (*new_line));
566 *new_line = *line_stats;
568 new_line->ncalls += sym->ncalls;
569 sym->file->line[sym->line_num - 1] = new_line;
574 /* plod over source files, annotating them: */
576 for (sf = first_src_file; sf; sf = sf->next)
578 if (!sf->num_lines || (ignore_zeros && sf->ncalls == 0))
583 num_executable_lines = num_lines_executed = 0;
584 ofp = annotate_source (sf, 16, annotate_with_count, sf);
590 if (bb_table_length > 0)
592 fprintf (ofp, _("\n\nTop %d Lines:\n\n Line Count\n\n"),
595 /* abuse line arrays---it's not needed anymore: */
596 qsort (sf->line, sf->num_lines, sizeof (sf->line[0]), cmp_ncalls);
597 table_len = bb_table_length;
598 if (table_len > sf->num_lines)
600 table_len = sf->num_lines;
602 for (i = 0; i < table_len; ++i)
605 if (!sym || sym->ncalls == 0)
609 fprintf (ofp, "%9d %10lu\n", sym->line_num, sym->ncalls);
616 fprintf (ofp, _("\nExecution Summary:\n\n"));
617 fprintf (ofp, _("%9ld Executable lines in this file\n"),
618 num_executable_lines);
619 fprintf (ofp, _("%9ld Lines executed\n"), num_lines_executed);
620 fprintf (ofp, _("%9.2f Percent of the file executed\n"),
622 ? 100.0 * num_lines_executed / (double) num_executable_lines
624 fprintf (ofp, _("\n%9lu Total number of line executions\n"),
626 fprintf (ofp, _("%9.2f Average executions per line\n"),
628 ? (double) sf->ncalls / (double) num_executable_lines