19990502 sourceware importbinu_ss_19990502

1 files changed, 635 insertions, 0 deletions

diff --git a/gprof/basic_blocks.c b/gprof/basic_blocks.c
new file mode 100644
index 00000000000..07b6f8d4eb0
--- /dev/null
+++ b/gprof/basic_blocks.c
@@ -0,0 +1,635 @@
+/*
+ * 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 "corefile.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;
+unsigned long 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 symbols and returns result
+ * such that sorting will be increasing according to filename, line
+ * number, and 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 (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.
+ */
+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;
+  unsigned 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);
+	  ncalls = bfd_get_32 (core_bfd, (bfd_byte *) &ncalls);
+
+	  sym = sym_lookup (&symtab, addr);
+
+	  if (sym)
+	    {
+	      int i;
+
+	      DBG (BBDEBUG,
+		   printf ("[bb_read_rec] 0x%lx->0x%lx (%s:%d) cnt=%lu\n",
+			   addr, sym->addr, sym->name, sym->line_num, ncalls));
+
+	      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 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;
+  unsigned long ncalls;
+  Sym *sym;
+  int i;
+
+  /* count how many non-zero blocks with have: */
+
+  for (sym = symtab.base; sym < symtab.limit; ++sym)
+    {
+      for (i = 0; i < NBBS && sym->bb_addr[i]; i++)
+	;
+      nblocks += i;
+    }
+
+  /* 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)
+    {
+      for (i = 0; i < NBBS && sym->bb_addr[i]; i++)
+	{
+	  put_vma (core_bfd, sym->bb_addr[i], (bfd_byte *) & addr);
+	  bfd_put_32 (core_bfd, sym->bb_calls[i], (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, j, 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 in the INCL_EXEC table
+       * or there is no INCL_EXEC table
+       *    and it does not appear in the EXCL_EXEC table.
+       */
+      if (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)
+    {
+      if (sym->ncalls > 0 || ! ignore_zeros)
+	{
+	  printf (_("%s:%d: (%s:0x%lx) %lu executions\n"),
+		  sym->file ? sym->file->name : _("<unknown>"), sym->line_num,
+		  sym->name, sym->addr, sym->ncalls);
+	}
+      for (j = 0; j < NBBS && sym->bb_addr[j]; j ++)
+	{
+	  if (sym->bb_calls[j] > 0 || ! ignore_zeros)
+	    {
+	      printf (_("%s:%d: (%s:0x%lx) %lu executions\n"),
+		      sym->file ? sym->file->name : _("<unknown>"), sym->line_num,
+		      sym->name, sym->bb_addr[j], sym->bb_calls[j]);
+	    }
+	}
+    }
+  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.
+ */
+
+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;
+  int i;
+  static unsigned long last_count;
+  unsigned long last_print = (unsigned long) -1;
+
+  b = NULL;
+  if (line_num <= sf->num_lines)
+    {
+      b = sf->line[line_num - 1];
+    }
+  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;
+      int len;
+
+      ++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).
+       */
+
+      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.
+       */
+
+      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;
+	    }
+
+	  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).
+       */
+
+      if (bb_annotate_all_lines && p == tmpbuf)
+	{
+	  sprintf (p, "%lu", last_count);
+	  p += strlen (p);
+	  ncalls = last_count;
+	  ncalls_set = 1;
+	}
+
+      if (! ncalls_set)
+	{
+	  int c;
+
+	  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
+	{
+	  int c;
+
+	  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.
+ */
+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->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 %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);
+	}
+    }
+}