From: Nicholas Nethercote <njn@valgrind.org>
Date: Sun, 12 Oct 2008 19:51:41 +0000 (+0000)
Subject: Patch from Robert O'Callahan:
X-Git-Tag: svn/VALGRIND_3_4_0~223
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d33b3e0d24beb38682e54705b3eab6fedfaa72db;p=thirdparty%2Fvalgrind.git

Patch from Robert O'Callahan:

  make realloc(NULL, size) behave like malloc(size), and make
  realloc(ptr, 0) behave like free(ptr), as the real libc realloc does.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@8666
---

diff --git a/coregrind/m_mallocfree.c b/coregrind/m_mallocfree.c
index d9976718e7..c775a163f2 100644
--- a/coregrind/m_mallocfree.c
+++ b/coregrind/m_mallocfree.c
@@ -1770,6 +1770,15 @@ void* VG_(arena_realloc) ( ArenaId aid, HChar* cc,
 
    vg_assert(req_pszB < MAX_PSZB);
 
+   if (NULL == ptr) {
+      return VG_(arena_malloc)(aid, cc, req_pszB);
+   }
+
+   if (req_pszB == 0) {
+      VG_(arena_free)(aid, ptr);
+      return NULL;
+   }
+
    b = get_payload_block(a, ptr);
    vg_assert(blockSane(a, b));