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1.1.8: access violation in dlopen
- To: <cygwin-patches at cygwin dot com>
- Subject: 1.1.8: access violation in dlopen
- From: Chrisiasci at aol dot com
- Date: Wed, 14 Feb 2001 11:12:00 EST
- Cc: <chrisiasci at aol dot com>
Hi,
I add a problem where dlopen would access violate if passed a non-existent dll.
The problem is that is this case, LoadLibrary is called with a NULL pointer.
It also seems that this does not always AV (depending on Os version...).
What this patch does is only checking the null pointer case and returning without trying to call LoadLibrary.
--- dlfcn.cc.ori Tue Oct 10 02:00:50 2000
+++ dlfcn.cc Wed Feb 14 14:54:40 2001
@@ -177,7 +177,10 @@ dlopen (const char *name, int)
{
/* handle for the named library */
const char *fullpath = get_full_path_of_dll (name);
- ret = (void *) LoadLibrary (fullpath);
+ if (fullpath)
+ {
+ ret = (void *) LoadLibrary (fullpath);
+ }
}
if (!ret)