Fix malloc_info without prioor allocations.

2 files changed, 28 insertions, 17 deletions

diff --git a/ChangeLog b/ChangeLog
index 3cf70a9..db85d0c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2010-01-14  Ulrich Drepper  <drepper@redhat.com>
 
+	[BZ #11126]
+	* malloc/malloc.c (malloc_info): Initialize malloc if not already
+	done.  Handle empty bin lists.
+
 	* posix/unistd.h: Change getpagesize and getdtablesize declaration
 	visibility some more.
 
diff --git a/malloc/malloc.c b/malloc/malloc.c
index ea10d17..b43e454 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -6369,16 +6369,19 @@ malloc_info (int options, FILE *fp)
 
     mbinptr bin = bin_at (ar_ptr, 1);
     struct malloc_chunk *r = bin->fd;
-    while (r != bin)
+    if (r != NULL)
       {
-	++sizes[NFASTBINS].count;
-	sizes[NFASTBINS].total += r->size;
-	sizes[NFASTBINS].from = MIN (sizes[NFASTBINS].from, r->size);
-	sizes[NFASTBINS].to = MAX (sizes[NFASTBINS].to, r->size);
-	r = r->fd;
+	while (r != bin)
+	  {
+	    ++sizes[NFASTBINS].count;
+	    sizes[NFASTBINS].total += r->size;
+	    sizes[NFASTBINS].from = MIN (sizes[NFASTBINS].from, r->size);
+	    sizes[NFASTBINS].to = MAX (sizes[NFASTBINS].to, r->size);
+	    r = r->fd;
+	  }
+	nblocks += sizes[NFASTBINS].count;
+	avail += sizes[NFASTBINS].total;
       }
-    nblocks += sizes[NFASTBINS].count;
-    avail += sizes[NFASTBINS].total;
 
     for (size_t i = 2; i < NBINS; ++i)
       {
@@ -6388,17 +6391,18 @@ malloc_info (int options, FILE *fp)
 	sizes[NFASTBINS - 1 + i].to = sizes[NFASTBINS - 1 + i].total
 	  = sizes[NFASTBINS - 1 + i].count = 0;
 
-	while (r != bin)
-	  {
-	    ++sizes[NFASTBINS - 1 + i].count;
-	    sizes[NFASTBINS - 1 + i].total += r->size;
-	    sizes[NFASTBINS - 1 + i].from = MIN (sizes[NFASTBINS - 1 + i].from,
+	if (r != NULL)
+	  while (r != bin)
+	    {
+	      ++sizes[NFASTBINS - 1 + i].count;
+	      sizes[NFASTBINS - 1 + i].total += r->size;
+	      sizes[NFASTBINS - 1 + i].from
+		= MIN (sizes[NFASTBINS - 1 + i].from, r->size);
+	      sizes[NFASTBINS - 1 + i].to = MAX (sizes[NFASTBINS - 1 + i].to,
 						 r->size);
-	    sizes[NFASTBINS - 1 + i].to = MAX (sizes[NFASTBINS - 1 + i].to,
-					       r->size);
 
-	    r = r->fd;
-	  }
+	      r = r->fd;
+	    }
 
 	if (sizes[NFASTBINS - 1 + i].count == 0)
 	  sizes[NFASTBINS - 1 + i].from = 0;
@@ -6460,6 +6464,9 @@ malloc_info (int options, FILE *fp)
     fputs ("</heap>\n", fp);
   }
 
+  if(__malloc_initialized < 0)
+    ptmalloc_init ();
+
   fputs ("<malloc version=\"1\">\n", fp);
 
   /* Iterate over all arenas currently in use.  */