Imported from ../bash-2.05a.tar.gz.

lib/malloc/stats.c

@@ -0,0 +1,147 @@
+/* stats.c - malloc statistics */
+
+/*  Copyright (C) 2001 Free Software Foundation, Inc.
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2, or (at your option)
+    any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include "imalloc.h"
+
+#ifdef MALLOC_STATS
+
+#include <stdio.h>
+#include "mstats.h"
+
+struct _malstats _mstats;
+
+struct bucket_stats
+malloc_bucket_stats (size)
+     int size;
+{
+  struct bucket_stats v;
+
+  v.nfree = 0;
+
+  if (size < 0 || size >= NBUCKETS)
+    {
+      v.blocksize = 0;
+      v.nused = v.nmal = v.nmorecore = v.nsplit = 0;
+      return v;
+    }
+
+  v.blocksize = 1 << (size + 3);
+  v.nused = _mstats.nmalloc[size];
+  v.nmal = _mstats.tmalloc[size];
+  v.nmorecore = _mstats.nmorecore[size];
+  v.nsplit = _mstats.nsplit[size];
+
+  v.nfree = malloc_free_blocks (size);	/* call back to malloc.c */
+
+  return v;
+}
+
+/* Return a copy of _MSTATS, with two additional fields filled in:
+   BYTESFREE is the total number of bytes on free lists.  BYTESUSED
+   is the total number of bytes in use.  These two fields are fairly
+   expensive to compute, so we do it only when asked to. */
+struct _malstats
+malloc_stats ()
+{
+  struct _malstats result;
+  struct bucket_stats v;
+  register int i;
+
+  result = _mstats;
+  result.bytesused = result.bytesfree = 0;
+  for (i = 0; i < NBUCKETS; i++)
+    {
+      v = malloc_bucket_stats (i);
+      result.bytesfree += v.nfree * v.blocksize;
+      result.bytesused += v.nused * v.blocksize;
+    }
+  return (result);
+}
+
+static void
+_print_malloc_stats (s, fp)
+     char *s;
+     FILE *fp;
+{
+  register int i;
+  unsigned long totused, totfree;
+  struct bucket_stats v;
+
+  fprintf (fp, "Memory allocation statistics: %s\n\tsize\tfree\tin use\ttotal\tmorecore\tsplit\n", s ? s : "");
+  for (i = totused = totfree = 0; i < NBUCKETS; i++)
+    {
+      v = malloc_bucket_stats (i);
+      fprintf (fp, "%12lu\t%4d\t%6d\t%5d\t%8d\t%5d\n", (unsigned long)v.blocksize, v.nfree, v.nused, v.nmal, v.nmorecore, v.nsplit);
+      totfree += v.nfree * v.blocksize;
+      totused += v.nused * v.blocksize;
+    }
+  fprintf (fp, "\nTotal bytes in use: %lu, total bytes free: %lu\n",
+	   totused, totfree);
+  fprintf (fp, "Total mallocs: %d, total frees: %d, total reallocs: %d (%d copies)\n",
+	   _mstats.nmal, _mstats.nfre, _mstats.nrealloc, _mstats.nrcopy);
+  fprintf (fp, "Total sbrks: %d, total bytes via sbrk: %d\n",
+  	   _mstats.nsbrk, _mstats.tsbrk);
+  fprintf (fp, "Total blocks split: %d, total block coalesces: %d\n",
+  	   _mstats.tbsplit, _mstats.tbcoalesce);
+}
+
+void
+print_malloc_stats (s)
+     char *s;
+{
+  _print_malloc_stats (s, stderr);
+}
+
+void
+fprint_malloc_stats (s, fp)
+     char *s;
+     FILE *fp;
+{
+  _print_malloc_stats (s, fp);
+}
+
+#define TRACEROOT "/var/tmp/maltrace/trace."
+extern char *inttostr ();
+
+void
+trace_malloc_stats (s)
+     char *s;
+{
+  char ibuf[32], *ip;
+  char fname[64];
+  long p;
+  FILE *fp;
+
+  p = getpid();
+  ip = inttostr(p, ibuf, sizeof(ibuf));
+  strcpy (fname, TRACEROOT);
+  strcat (fname, ip);
+  fp = fopen(fname, "w");
+  if (fp)
+    {
+      _print_malloc_stats (s, fp);
+      fflush(fp);
+      fclose(fp);
+    }
+}
+
+#endif /* MALLOC_STATS */