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[Emacs-diffs] Changes to emacs/src/w32.c,v
From: |
Eli Zaretskii |
Subject: |
[Emacs-diffs] Changes to emacs/src/w32.c,v |
Date: |
Sat, 05 Aug 2006 13:01:10 +0000 |
CVSROOT: /cvsroot/emacs
Module name: emacs
Changes by: Eli Zaretskii <eliz> 06/08/05 13:01:10
Index: w32.c
===================================================================
RCS file: /cvsroot/emacs/emacs/src/w32.c,v
retrieving revision 1.105
retrieving revision 1.106
diff -u -b -r1.105 -r1.106
--- w32.c 21 Jul 2006 17:27:34 -0000 1.105
+++ w32.c 5 Aug 2006 13:01:10 -0000 1.106
@@ -323,6 +323,28 @@
return buf;
}
+/* Return 1 if P is a valid pointer to an object of size SIZE. Return
+ 0 if P is NOT a valid pointer. Return -1 if we cannot validate P.
+
+ This is called from alloc.c:valid_pointer_p. */
+int
+w32_valid_pointer_p (void *p, int size)
+{
+ SIZE_T done;
+ HANDLE h = OpenProcess (PROCESS_VM_READ, FALSE, GetCurrentProcessId ());
+
+ if (h)
+ {
+ unsigned char *buf = alloca (size);
+ int retval = ReadProcessMemory (h, p, buf, size, &done);
+
+ CloseHandle (h);
+ return retval;
+ }
+ else
+ return -1;
+}
+
static char startup_dir[MAXPATHLEN];
/* Get the current working directory. */
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