summaryrefslogtreecommitdiffstats
path: root/lib/malloc/stats.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--lib/malloc/stats.c213
1 files changed, 213 insertions, 0 deletions
diff --git a/lib/malloc/stats.c b/lib/malloc/stats.c
new file mode 100644
index 0000000..0524797
--- /dev/null
+++ b/lib/malloc/stats.c
@@ -0,0 +1,213 @@
+/* stats.c - malloc statistics */
+
+/* Copyright (C) 2001-2003 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne-Again SHell.
+
+ Bash 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 3 of the License, or
+ (at your option) any later version.
+
+ Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "imalloc.h"
+
+#ifdef MALLOC_STATS
+
+#include <stdio.h>
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#include <string.h>
+
+#include "mstats.h"
+
+extern int malloc_free_blocks __P((int));
+
+extern int malloc_mmap_threshold;
+
+extern struct _malstats _mstats;
+
+extern FILE *_imalloc_fopen __P((char *, char *, char *, char *, size_t));
+
+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.nlesscore = 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.nlesscore = _mstats.nlesscore[size];
+ v.nsplit = _mstats.nsplit[size];
+ v.ncoalesce = _mstats.ncoalesce[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 size\tfree\tin use\ttotal\tmorecore lesscore split\tcoalesce\n", s ? s : "");
+ for (i = totused = totfree = 0; i < NBUCKETS; i++)
+ {
+ v = malloc_bucket_stats (i);
+ /* Show where the mmap threshold is; sizes greater than this use mmap to
+ allocate and munmap to free (munmap shows up as lesscore). */
+ if (i == malloc_mmap_threshold+1)
+ fprintf (fp, "--------\n");
+ if (v.nmal > 0)
+ fprintf (fp, "%8lu\t%4d\t%6d\t%5d\t%8d\t%8d %5d %8d\n", (unsigned long)v.blocksize, v.nfree, v.nused, v.nmal, v.nmorecore, v.nlesscore, v.nsplit, v.ncoalesce);
+ 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, "\nTotal bytes requested by application: %lu\n", (unsigned long)_mstats.bytesreq);
+ 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 mmaps: %d, total bytes via mmap: %d\n",
+ _mstats.nmmap, _mstats.tmmap);
+ 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/stats."
+
+void
+trace_malloc_stats (s, fn)
+ char *s, *fn;
+{
+ FILE *fp;
+ char defname[sizeof (TRACEROOT) + 64];
+ static char mallbuf[1024];
+
+ fp = _imalloc_fopen (s, fn, TRACEROOT, defname, sizeof (defname));
+ if (fp)
+ {
+ setvbuf (fp, mallbuf, _IOFBF, sizeof (mallbuf));
+ _print_malloc_stats (s, fp);
+ fflush(fp);
+ fclose(fp);
+ }
+}
+
+#endif /* MALLOC_STATS */
+
+#if defined (MALLOC_STATS) || defined (MALLOC_TRACE)
+FILE *
+_imalloc_fopen (s, fn, def, defbuf, defsiz)
+ char *s;
+ char *fn;
+ char *def;
+ char *defbuf;
+ size_t defsiz;
+{
+ char fname[1024];
+ long l;
+ FILE *fp;
+
+ l = (long)getpid ();
+ if (fn == 0)
+ {
+ sprintf (defbuf, "%s%ld", def, l);
+ fp = fopen(defbuf, "w");
+ }
+ else
+ {
+ char *p, *q, *r;
+ char pidbuf[32];
+ int sp;
+
+ sprintf (pidbuf, "%ld", l);
+ if ((strlen (pidbuf) + strlen (fn) + 2) >= sizeof (fname))
+ return ((FILE *)0);
+ for (sp = 0, p = fname, q = fn; *q; )
+ {
+ if (sp == 0 && *q == '%' && q[1] == 'p')
+ {
+ sp = 1;
+ for (r = pidbuf; *r; )
+ *p++ = *r++;
+ q += 2;
+ }
+ else
+ *p++ = *q++;
+ }
+ *p = '\0';
+ fp = fopen (fname, "w");
+ }
+
+ return fp;
+}
+#endif /* MALLOC_STATS || MALLOC_TRACE */