Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 122 insertions, 0 deletions

diff --git a/source3/lib/util_malloc.c b/source3/lib/util_malloc.c
new file mode 100644
index 0000000..ff78db6
--- /dev/null
+++ b/source3/lib/util_malloc.c
@@ -0,0 +1,122 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+   Copyright (C) Andrew Tridgell 1992-1998
+   Copyright (C) Jeremy Allison 2001-2007
+   Copyright (C) Simo Sorce 2001
+   Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
+   Copyright (C) James Peach 2006
+
+   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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+
+#if defined(PARANOID_MALLOC_CHECKER)
+
+/****************************************************************************
+ Internal malloc wrapper. Externally visible.
+****************************************************************************/
+
+void *malloc_(size_t size)
+{
+	if (size == 0) {
+		return NULL;
+	}
+#undef malloc
+	return malloc(size);
+#define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
+}
+
+/****************************************************************************
+ Internal realloc wrapper. Not externally visible.
+****************************************************************************/
+
+static void *realloc_(void *ptr, size_t size)
+{
+#undef realloc
+	return realloc(ptr, size);
+#define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
+}
+
+#endif /* PARANOID_MALLOC_CHECKER */
+
+/****************************************************************************
+ Expand a pointer to be a particular size.
+ Note that this version of Realloc has an extra parameter that decides
+ whether to free the passed in storage on allocation failure or if the
+ new size is zero.
+
+ This is designed for use in the typical idiom of :
+
+ p = SMB_REALLOC(p, size)
+ if (!p) {
+    return error;
+ }
+
+ and not to have to keep track of the old 'p' contents to free later, nor
+ to worry if the size parameter was zero. In the case where NULL is returned
+ we guarentee that p has been freed.
+
+ If free later semantics are desired, then pass 'free_old_on_error' as False which
+ guarentees that the old contents are not freed on error, even if size == 0. To use
+ this idiom use :
+
+ tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
+ if (!tmp) {
+    SAFE_FREE(p);
+    return error;
+ } else {
+    p = tmp;
+ }
+
+ Changes were instigated by Coverity error checking. JRA.
+****************************************************************************/
+
+void *Realloc(void *p, size_t size, bool free_old_on_error)
+{
+	void *ret=NULL;
+
+	if (size == 0) {
+		if (free_old_on_error) {
+			SAFE_FREE(p);
+		}
+		DEBUG(2,("Realloc asked for 0 bytes\n"));
+		return NULL;
+	}
+
+#if defined(PARANOID_MALLOC_CHECKER)
+	if (!p) {
+		ret = (void *)malloc_(size);
+	} else {
+		ret = (void *)realloc_(p,size);
+	}
+#else
+	if (!p) {
+		ret = (void *)malloc(size);
+	} else {
+		ret = (void *)realloc(p,size);
+	}
+#endif
+
+	if (!ret) {
+		if (free_old_on_error && p) {
+			SAFE_FREE(p);
+		}
+		DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
+	}
+
+	return(ret);
+}
+