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Add overflow detection

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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.
This commit is contained in:
Scarlett
2015-01-15 19:38:11 +09:00
committed by Tatsuya Kinoshita
parent fde71b37d2
commit cbec7032ee
6 changed files with 51 additions and 17 deletions
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7
indep.h
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@@ -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)))