From: Oliver Kurth <okurth@vmware.com>
Date: Fri, 15 Sep 2017 18:23:43 +0000 (-0700)
Subject: Remove memory zero related functions from util.h
X-Git-Tag: stable-10.2.0~173
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=7bffaf26f46a28893e07df2a46bfdb612b8a15c2;p=thirdparty%2Fopen-vm-tools.git

Remove memory zero related functions from util.h

Add a new header utilZero.h
---

diff --git a/open-vm-tools/lib/include/util.h b/open-vm-tools/lib/include/util.h
index 6d3d75d1e..48bacaa78 100644
--- a/open-vm-tools/lib/include/util.h
+++ b/open-vm-tools/lib/include/util.h
@@ -1,5 +1,5 @@
 /*********************************************************
- * Copyright (C) 1998-2016 VMware, Inc. All rights reserved.
+ * Copyright (C) 1998-2017 VMware, Inc. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as published
@@ -49,6 +49,7 @@
 #include "vm_assert.h"
 #include "vm_basic_defs.h"
 #include "unicodeTypes.h"
+#include "utilZero.h"
 
 #if defined(__cplusplus)
 extern "C" {
@@ -173,107 +174,6 @@ uint32 Util_FastRand(uint32 seed);
 // Not thread safe!
 void Util_OverrideHomeDir(const char *path);
 
-
-/*
- *-----------------------------------------------------------------------------
- *
- * Util_ValidateBytes --
- *
- *      Check that memory is filled with the specified value.
- *
- * Results:
- *      NULL   No error
- *      !NULL  First address that doesn't have the proper value
- *
- * Side effects:
- *      None.
- *
- *-----------------------------------------------------------------------------
- */
-
-static INLINE void *
-Util_ValidateBytes(const void *ptr,  // IN: ptr to check
-                   size_t size,      // IN: size of ptr
-                   uint8 byteValue)  // IN: memory must be filled with this
-{
-   uint8 *p;
-   uint8 *end;
-   uint64 bigValue;
-
-   ASSERT(ptr);
-
-   if (size == 0) {
-      return NULL;
-   }
-
-   p = (uint8 *) ptr;
-   end = p + size;
-
-   /* Compare bytes until a "nice" boundary is achieved. */
-   while ((uintptr_t) p % sizeof bigValue) {
-      if (*p != byteValue) {
-         return p;
-      }
-
-      p++;
-
-      if (p == end) {
-         return NULL;
-      }
-   }
-
-   /* Compare using a "nice sized" chunk for a long as possible. */
-   memset(&bigValue, (int) byteValue, sizeof bigValue);
-
-   while (p + sizeof bigValue <= end) {
-      if (*((uint64 *) p) != bigValue) {
-         /* That's not right... let the loop below report the exact address. */
-         break;
-      }
-
-      size -= sizeof bigValue;
-      p += sizeof bigValue;
-   }
-
-   /* Handle any trailing bytes. */
-   while (p < end) {
-      if (*p != byteValue) {
-         return p;
-      }
-
-      p++;
-   }
-
-   return NULL;
-}
-
-
-/*
- *----------------------------------------------------------------------
- *
- * Util_BufferIsEmpty --
- *
- *    Determine if the specified buffer of 'len' bytes starting at 'base'
- *    is empty (i.e. full of zeroes).
- *
- * Results:
- *    TRUE  Yes
- *    FALSE No
- *
- * Side effects:
- *    None
- *
- *----------------------------------------------------------------------
- */
-
-static INLINE Bool
-Util_BufferIsEmpty(void const *base,  // IN:
-                   size_t len)        // IN:
-{
-   return Util_ValidateBytes(base, len, '\0') == NULL;
-}
-
-
 Bool Util_MakeSureDirExistsAndAccessible(char const *path,
                                          unsigned int mode);
 
@@ -425,165 +325,7 @@ void *Util_Memdup(const void *src, size_t size);
 void *Util_Memcpy(void *dest, const void *src, size_t count);
 
 
-/*
- *-----------------------------------------------------------------------------
- *
- * Util_Zero --
- *
- *      Zeros out bufSize bytes of buf. NULL is legal.
- *
- * Results:
- *      None.
- *
- * Side effects:
- *      See above.
- *
- *-----------------------------------------------------------------------------
- */
-
-static INLINE void
-Util_Zero(void *buf,       // OUT
-          size_t bufSize)  // IN
-{
-   if (buf != NULL) {
-#if defined _WIN32 && defined USERLEVEL
-      /*
-       * Simple memset calls might be optimized out.  See CERT advisory
-       * MSC06-C.
-       */
-      SecureZeroMemory(buf, bufSize);
-#else
-      memset(buf, 0, bufSize);
-#if !defined _WIN32
-      /*
-       * Memset calls before free might be optimized out.  See PR1248269.
-       */
-      __asm__ __volatile__("" : : "r"(&buf) : "memory");
-#endif
-#endif
-   }
-}
-
-
-/*
- *-----------------------------------------------------------------------------
- *
- * Util_ZeroString --
- *
- *      Zeros out a NULL-terminated string. NULL is legal.
- *
- * Results:
- *      None.
- *
- * Side effects:
- *      See above.
- *
- *-----------------------------------------------------------------------------
- */
-
-static INLINE void
-Util_ZeroString(char *str)  // IN/OUT/OPT
-{
-   if (str != NULL) {
-      Util_Zero(str, strlen(str));
-   }
-}
-
-
 #ifndef VMKBOOT
-/*
- *-----------------------------------------------------------------------------
- *
- * Util_ZeroFree --
- *
- *      Zeros out bufSize bytes of buf, and then frees it. NULL is
- *      legal.
- *
- * Results:
- *      None.
- *
- * Side effects:
- *	buf is zeroed, and then free() is called on it.
- *
- *-----------------------------------------------------------------------------
- */
-
-static INLINE void
-Util_ZeroFree(void *buf,       // OUT/OPT
-              size_t bufSize)  // IN
-{
-   if (buf != NULL) {
-      // See Posix_Free.
-      int err = errno;
-      Util_Zero(buf, bufSize);
-      free(buf);
-      errno = err;
-   }
-}
-
-
-/*
- *-----------------------------------------------------------------------------
- *
- * Util_ZeroFreeString --
- *
- *      Zeros out a NULL-terminated string, and then frees it. NULL is
- *      legal.
- *
- * Results:
- *      None.
- *
- * Side effects:
- *	str is zeroed, and then free() is called on it.
- *
- *-----------------------------------------------------------------------------
- */
-
-static INLINE void
-Util_ZeroFreeString(char *str)  // IN/OUT/OPT
-{
-   if (str != NULL) {
-      // See Posix_Free.
-      int err = errno;
-      Util_ZeroString(str);
-      free(str);
-      errno = err;
-   }
-}
-
-
-#ifdef _WIN32
-/*
- *-----------------------------------------------------------------------------
- *
- * Util_ZeroFreeStringW --
- *
- *      Zeros out a NUL-terminated wide-character string, and then frees it.
- *      NULL is legal.
- *
- * Results:
- *      None.
- *
- * Side effects:
- *	str is zeroed, and then free() is called on it.
- *
- *-----------------------------------------------------------------------------
- */
-
-static INLINE void
-Util_ZeroFreeStringW(wchar_t *str)  // IN/OUT/OPT
-{
-   if (str != NULL) {
-      // See Posix_Free.
-      int err = errno;
-      Util_Zero(str, wcslen(str) * sizeof *str);
-      free(str);
-      errno = err;
-   }
-}
-#endif // _WIN32
-
-
 /*
  *-----------------------------------------------------------------------------
  *
@@ -646,7 +388,7 @@ Util_FreeStringList(char **list,      // IN/OUT/OPT: the list to free
 {
    Util_FreeList((void **) list, length);
 }
-#endif
+#endif /* VMKBOOT */
 
 
 /*