1 files changed, 145 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/posix/rtmempage-exec-mmap-posix.cpp b/src/VBox/Runtime/r3/posix/rtmempage-exec-mmap-posix.cpp
new file mode 100644
index 00000000..718dbbee
--- /dev/null
+++ b/src/VBox/Runtime/r3/posix/rtmempage-exec-mmap-posix.cpp
@@ -0,0 +1,145 @@
+/* $Id: rtmempage-exec-mmap-posix.cpp $ */
+/** @file
+ * IPRT - RTMemPage*, POSIX with mmap only.
+ */
+
+/*
+ * Copyright (C) 2006-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "internal/iprt.h"
+#include <iprt/mem.h>
+
+#include <iprt/asm.h>
+#include <iprt/assert.h>
+#include <iprt/errcore.h>
+#include <iprt/param.h>
+#include <iprt/string.h>
+
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/mman.h>
+#if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
+# define MAP_ANONYMOUS MAP_ANON
+#endif
+
+
+/**
+ * Allocates memory from the specified heap.
+ *
+ * @returns Address of the allocated memory.
+ * @param   cb                  The number of bytes to allocate.
+ * @param   pszTag              The tag.
+ * @param   fZero               Whether to zero the memory or not.
+ * @param   fProtExec           PROT_EXEC or 0.
+ */
+static void *rtMemPagePosixAlloc(size_t cb, const char *pszTag, bool fZero, int fProtExec)
+{
+    /*
+     * Validate & adjust the input.
+     */
+    Assert(cb > 0);
+    NOREF(pszTag);
+    cb = RT_ALIGN_Z(cb, PAGE_SIZE);
+
+    /*
+     * Do the allocation.
+     */
+    void *pv = mmap(NULL, cb,
+                    PROT_READ | PROT_WRITE | fProtExec,
+                    MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+    if (pv != MAP_FAILED)
+    {
+        AssertPtr(pv);
+        if (fZero)
+            RT_BZERO(pv, cb);
+    }
+    else
+        pv = NULL;
+
+    return pv;
+}
+
+
+/**
+ * Free memory allocated by rtMemPagePosixAlloc.
+ *
+ * @param   pv                  The address of the memory to free.
+ * @param   cb                  The size.
+ */
+static void rtMemPagePosixFree(void *pv, size_t cb)
+{
+    /*
+     * Validate & adjust the input.
+     */
+    if (!pv)
+        return;
+    AssertPtr(pv);
+    Assert(cb > 0);
+    Assert(!((uintptr_t)pv & PAGE_OFFSET_MASK));
+    cb = RT_ALIGN_Z(cb, PAGE_SIZE);
+
+    /*
+     * Free the memory.
+     */
+    int rc = munmap(pv, cb);
+    AssertMsg(rc == 0, ("rc=%d pv=%p cb=%#zx\n", rc, pv, cb)); NOREF(rc);
+}
+
+
+
+
+
+RTDECL(void *) RTMemPageAllocTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF
+{
+    return rtMemPagePosixAlloc(cb, pszTag, false /*fZero*/, 0);
+}
+
+
+RTDECL(void *) RTMemPageAllocZTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF
+{
+    return rtMemPagePosixAlloc(cb, pszTag, true /*fZero*/, 0);
+}
+
+
+RTDECL(void) RTMemPageFree(void *pv, size_t cb) RT_NO_THROW_DEF
+{
+    return rtMemPagePosixFree(pv, cb);
+}
+
+
+
+
+
+RTDECL(void *) RTMemExecAllocTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF
+{
+    return rtMemPagePosixAlloc(cb, pszTag, false /*fZero*/, PROT_EXEC);
+}
+
+
+RTDECL(void) RTMemExecFree(void *pv, size_t cb) RT_NO_THROW_DEF
+{
+    return rtMemPagePosixFree(pv, cb);
+}
+