Add overflow detection

Origin: http://marc.info/?l=openbsd-ports&m=142090828929750&w=2

* main.c: Call exit(1) when out of memory to avoid dereferencing null
pointers when gc's malloc fails.

* alloc.h: Replacements for w3m's allocation macros which add
overflow detection and concentrate the macros in one file.

* indep.h, libwc/charset.c, libwc/status.c, matrix.c: Use the
overflow-detecting allocation macros from alloc.h.

1 files changed, 1 insertions, 6 deletions

diff --git a/indep.h b/indep.h
index 84416ed..2809832 100644
--- a/indep.h
+++ b/indep.h
@@ -1,7 +1,7 @@
 /* $Id: indep.h,v 1.16 2003/09/22 21:02:19 ukai Exp $ */
 #ifndef INDEP_H
 #define INDEP_H
-#include <gc.h>
+#include "alloc.h"
 #include "Str.h"
 #include "config.h"
 
@@ -92,11 +92,6 @@ extern char *w3m_etc_dir();
 extern char *w3m_conf_dir();
 extern char *w3m_help_dir();
 
-#define New(type)	((type*)GC_MALLOC(sizeof(type)))
-#define NewAtom(type)	((type*)GC_MALLOC_ATOMIC(sizeof(type)))
-#define New_N(type,n)	((type*)GC_MALLOC((n)*sizeof(type)))
-#define NewAtom_N(type,n)	((type*)GC_MALLOC_ATOMIC((n)*sizeof(type)))
-#define New_Reuse(type,ptr,n)   ((type*)GC_REALLOC((ptr),(n)*sizeof(type)))
 #define NewWithoutGC(type)	((type*)xmalloc(sizeof(type)))
 #define NewWithoutGC_N(type,n)	((type*)xmalloc((n)*sizeof(type)))
 #define NewWithoutGC_Reuse(type,ptr,n)	((type*)xrealloc(ptr,(n)*sizeof(type)))