1 files changed, 152 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/allocex.cpp b/src/VBox/Runtime/r3/allocex.cpp
new file mode 100644
index 00000000..36371c5a
--- /dev/null
+++ b/src/VBox/Runtime/r3/allocex.cpp
@@ -0,0 +1,152 @@
+/* $Id: allocex.cpp $ */
+/** @file
+ * IPRT - Memory Allocation, Extended Alloc and Free Functions for Ring-3, posix.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define RTMEM_NO_WRAP_TO_EF_APIS
+#include <iprt/mem.h>
+#include "internal/iprt.h"
+
+#include <iprt/assert.h>
+#include <iprt/err.h>
+#include <iprt/string.h>
+#include "internal/magics.h"
+#include "allocex.h"
+
+
+RTDECL(int) RTMemAllocExTag(size_t cb, size_t cbAlignment, uint32_t fFlags, const char *pszTag, void **ppv) RT_NO_THROW_DEF
+{
+    RT_NOREF_PV(pszTag);
+
+    /*
+     * Validate and adjust input.
+     */
+    AssertMsgReturn(!(fFlags & ~RTMEMALLOCEX_FLAGS_VALID_MASK), ("%#x\n", fFlags), VERR_INVALID_PARAMETER);
+    AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
+    AssertReturn(RT_IS_POWER_OF_TWO(cbAlignment), VERR_INVALID_PARAMETER);
+    AssertMsgReturn(cbAlignment <= sizeof(void *), ("%zu (%#x)\n", cbAlignment, cbAlignment), VERR_UNSUPPORTED_ALIGNMENT);
+
+    if (fFlags & RTMEMALLOCEX_FLAGS_ANY_CTX)
+        return VERR_NOT_SUPPORTED;
+
+    /*
+     * Align the request.
+     */
+    size_t cbAligned = cb;
+    if (cbAlignment)
+        cbAligned = RT_ALIGN_Z(cb, cbAlignment);
+    else
+        cbAligned = RT_ALIGN_Z(cb, sizeof(uint64_t));
+    AssertMsgReturn(cbAligned >= cb && cbAligned <= ~(size_t)0, ("cbAligned=%#zx cb=%#zx", cbAligned, cb),
+                    VERR_INVALID_PARAMETER);
+
+    /*
+     * Allocate the requested memory.
+     */
+    void *pv;
+    if (fFlags & (RTMEMALLOCEX_FLAGS_16BIT_REACH | RTMEMALLOCEX_FLAGS_32BIT_REACH))
+    {
+        int rc;
+        if (fFlags & RTMEMALLOCEX_FLAGS_16BIT_REACH)
+            rc = rtMemAllocEx16BitReach(cbAligned + sizeof(RTMEMHDRR3), fFlags, &pv);
+        else
+            rc = rtMemAllocEx32BitReach(cbAligned + sizeof(RTMEMHDRR3), fFlags, &pv);
+        if (RT_FAILURE(rc))
+            return rc;
+    }
+    else if (fFlags & RTMEMALLOCEX_FLAGS_EXEC)
+    {
+        pv = RTMemPageAlloc(cbAligned + sizeof(RTMEMHDRR3));
+        if (pv)
+        {
+            if (fFlags & RTMEMALLOCEX_FLAGS_ZEROED)
+                RT_BZERO(pv, cbAligned + sizeof(RTMEMHDRR3));
+
+            int rc = RTMemProtect(pv, cbAligned + sizeof(RTMEMHDRR3), RTMEM_PROT_EXEC | RTMEM_PROT_READ | RTMEM_PROT_WRITE);
+            if (RT_FAILURE(rc))
+            {
+                RTMemPageFree(pv, cbAligned + sizeof(RTMEMHDRR3));
+                return rc;
+            }
+        }
+    }
+    else if (fFlags & RTMEMALLOCEX_FLAGS_ZEROED)
+        pv = RTMemAllocZ(cbAligned + sizeof(RTMEMHDRR3));
+    else
+        pv = RTMemAlloc(cbAligned + sizeof(RTMEMHDRR3));
+    if (!pv)
+        return VERR_NO_MEMORY;
+
+    /*
+     * Fill in the header and return.
+     */
+    PRTMEMHDRR3 pHdr = (PRTMEMHDRR3)pv;
+    pHdr->u32Magic  = RTMEMHDR_MAGIC;
+    pHdr->fFlags    = fFlags;
+    pHdr->cb        = (uint32_t)cbAligned;
+    pHdr->cbReq     = (uint32_t)cb;
+
+    *ppv = pHdr + 1;
+    return VINF_SUCCESS;
+}
+RT_EXPORT_SYMBOL(RTMemAllocExTag);
+
+
+RTDECL(void) RTMemFreeEx(void *pv, size_t cb) RT_NO_THROW_DEF
+{
+    if (!pv)
+        return;
+    AssertPtr(pv);
+
+    PRTMEMHDRR3 pHdr = (PRTMEMHDRR3)pv - 1;
+    AssertMsg(pHdr->u32Magic == RTMEMHDR_MAGIC, ("pHdr->u32Magic=%RX32 pv=%p cb=%#x\n", pHdr->u32Magic, pv, cb));
+    pHdr->u32Magic = RTMEMHDR_MAGIC_DEAD;
+    Assert(pHdr->cbReq == cb); RT_NOREF_PV(cb);
+
+    if (pHdr->fFlags & (RTMEMALLOCEX_FLAGS_16BIT_REACH | RTMEMALLOCEX_FLAGS_32BIT_REACH))
+        rtMemFreeExYyBitReach(pHdr, pHdr->cb + sizeof(*pHdr), pHdr->fFlags);
+    else if (pHdr->fFlags & RTMEMALLOCEX_FLAGS_EXEC)
+    {
+        RTMemProtect(pHdr, pHdr->cb + sizeof(*pHdr), RTMEM_PROT_READ | RTMEM_PROT_WRITE);
+        RTMemPageFree(pHdr, pHdr->cb + sizeof(*pHdr));
+    }
+    else
+        RTMemFree(pHdr);
+}
+RT_EXPORT_SYMBOL(RTMemFreeEx);
+