From a1a8c94577dde1ba63badc32e5564470b136c33d Mon Sep 17 00:00:00 2001
From: Martin Stjernholm <mast@lysator.liu.se>
Date: Sun, 3 Sep 2000 01:11:27 +0200
Subject: [PATCH] Added dmalloc_is_invalid_memory_block, as per hubbes
instructions.
Rev: src/dmalloc.h:1.27
Rev: src/pike_memory.c:1.81
---
src/dmalloc.h | 3 ++-
src/pike_memory.c | 10 +++++++++-
2 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/src/dmalloc.h b/src/dmalloc.h
index 28ff3a42c5..db1b8f6804 100644
--- a/src/dmalloc.h
+++ b/src/dmalloc.h
@@ -1,5 +1,5 @@
/*
- * $Id: dmalloc.h,v 1.26 2000/08/04 01:32:39 hubbe Exp $
+ * $Id: dmalloc.h,v 1.27 2000/09/02 23:11:27 mast Exp $
*/
extern char *debug_xalloc(size_t);
@@ -80,6 +80,7 @@ void dmalloc_add_mmap_entry(struct memory_map *m,
int count,
struct memory_map *recur,
int recur_offset);
+int dmalloc_is_invalid_memory_block(void *block);
#else
diff --git a/src/pike_memory.c b/src/pike_memory.c
index 96608188a5..acb722b8fe 100644
--- a/src/pike_memory.c
+++ b/src/pike_memory.c
@@ -10,7 +10,7 @@
#include "pike_macros.h"
#include "gc.h"
-RCSID("$Id: pike_memory.c,v 1.80 2000/08/16 15:51:20 grubba Exp $");
+RCSID("$Id: pike_memory.c,v 1.81 2000/09/02 23:11:27 mast Exp $");
/* strdup() is used by several modules, so let's provide it */
#ifndef HAVE_STRDUP
@@ -2245,4 +2245,12 @@ void dmalloc_add_mmap_entry(struct memory_map *m,
mt_unlock(&debug_malloc_mutex);
}
+int dmalloc_is_invalid_memory_block(void *block)
+{
+ struct memhdr *mh=my_find_memhdr(block,0);
+ if(!mh) return -1; /* no such known block */
+ if(mh->size < 0) return -2; /* block has been freed */
+ return 0; /* block is valid */
+}
+
#endif
--
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