| 1 | /* $Id: allocex.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - Memory Allocation, Extended Alloc and Free Functions for Ring-3, posix.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2020 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | */
|
|---|
| 26 |
|
|---|
| 27 |
|
|---|
| 28 | /*********************************************************************************************************************************
|
|---|
| 29 | * Header Files *
|
|---|
| 30 | *********************************************************************************************************************************/
|
|---|
| 31 | #define RTMEM_NO_WRAP_TO_EF_APIS
|
|---|
| 32 | #include <iprt/mem.h>
|
|---|
| 33 | #include "internal/iprt.h"
|
|---|
| 34 |
|
|---|
| 35 | #include <iprt/assert.h>
|
|---|
| 36 | #include <iprt/err.h>
|
|---|
| 37 | #include <iprt/string.h>
|
|---|
| 38 | #include "internal/magics.h"
|
|---|
| 39 | #include "allocex.h"
|
|---|
| 40 |
|
|---|
| 41 |
|
|---|
| 42 | RTDECL(int) RTMemAllocExTag(size_t cb, size_t cbAlignment, uint32_t fFlags, const char *pszTag, void **ppv) RT_NO_THROW_DEF
|
|---|
| 43 | {
|
|---|
| 44 | RT_NOREF_PV(pszTag);
|
|---|
| 45 |
|
|---|
| 46 | /*
|
|---|
| 47 | * Validate and adjust input.
|
|---|
| 48 | */
|
|---|
| 49 | AssertMsgReturn(!(fFlags & ~RTMEMALLOCEX_FLAGS_VALID_MASK), ("%#x\n", fFlags), VERR_INVALID_PARAMETER);
|
|---|
| 50 | AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
|
|---|
| 51 | AssertReturn(RT_IS_POWER_OF_TWO(cbAlignment), VERR_INVALID_PARAMETER);
|
|---|
| 52 | AssertMsgReturn(cbAlignment <= sizeof(void *), ("%zu (%#x)\n", cbAlignment, cbAlignment), VERR_UNSUPPORTED_ALIGNMENT);
|
|---|
| 53 |
|
|---|
| 54 | if (fFlags & RTMEMALLOCEX_FLAGS_ANY_CTX)
|
|---|
| 55 | return VERR_NOT_SUPPORTED;
|
|---|
| 56 |
|
|---|
| 57 | /*
|
|---|
| 58 | * Align the request.
|
|---|
| 59 | */
|
|---|
| 60 | size_t cbAligned = cb;
|
|---|
| 61 | if (cbAlignment)
|
|---|
| 62 | cbAligned = RT_ALIGN_Z(cb, cbAlignment);
|
|---|
| 63 | else
|
|---|
| 64 | cbAligned = RT_ALIGN_Z(cb, sizeof(uint64_t));
|
|---|
| 65 | AssertMsgReturn(cbAligned >= cb && cbAligned <= ~(size_t)0, ("cbAligned=%#zx cb=%#zx", cbAligned, cb),
|
|---|
| 66 | VERR_INVALID_PARAMETER);
|
|---|
| 67 |
|
|---|
| 68 | /*
|
|---|
| 69 | * Allocate the requested memory.
|
|---|
| 70 | */
|
|---|
| 71 | void *pv;
|
|---|
| 72 | if (fFlags & (RTMEMALLOCEX_FLAGS_16BIT_REACH | RTMEMALLOCEX_FLAGS_32BIT_REACH))
|
|---|
| 73 | {
|
|---|
| 74 | int rc;
|
|---|
| 75 | if (fFlags & RTMEMALLOCEX_FLAGS_16BIT_REACH)
|
|---|
| 76 | rc = rtMemAllocEx16BitReach(cbAligned + sizeof(RTMEMHDRR3), fFlags, &pv);
|
|---|
| 77 | else
|
|---|
| 78 | rc = rtMemAllocEx32BitReach(cbAligned + sizeof(RTMEMHDRR3), fFlags, &pv);
|
|---|
| 79 | if (RT_FAILURE(rc))
|
|---|
| 80 | return rc;
|
|---|
| 81 | }
|
|---|
| 82 | else if (fFlags & RTMEMALLOCEX_FLAGS_EXEC)
|
|---|
| 83 | {
|
|---|
| 84 | pv = RTMemExecAlloc(cbAligned + sizeof(RTMEMHDRR3));
|
|---|
| 85 | if ((fFlags & RTMEMALLOCEX_FLAGS_ZEROED) && pv)
|
|---|
| 86 | RT_BZERO(pv, cbAligned + sizeof(RTMEMHDRR3));
|
|---|
| 87 | }
|
|---|
| 88 | else if (fFlags & RTMEMALLOCEX_FLAGS_ZEROED)
|
|---|
| 89 | pv = RTMemAllocZ(cbAligned + sizeof(RTMEMHDRR3));
|
|---|
| 90 | else
|
|---|
| 91 | pv = RTMemAlloc(cbAligned + sizeof(RTMEMHDRR3));
|
|---|
| 92 | if (!pv)
|
|---|
| 93 | return VERR_NO_MEMORY;
|
|---|
| 94 |
|
|---|
| 95 | /*
|
|---|
| 96 | * Fill in the header and return.
|
|---|
| 97 | */
|
|---|
| 98 | PRTMEMHDRR3 pHdr = (PRTMEMHDRR3)pv;
|
|---|
| 99 | pHdr->u32Magic = RTMEMHDR_MAGIC;
|
|---|
| 100 | pHdr->fFlags = fFlags;
|
|---|
| 101 | pHdr->cb = (uint32_t)cbAligned;
|
|---|
| 102 | pHdr->cbReq = (uint32_t)cb;
|
|---|
| 103 |
|
|---|
| 104 | *ppv = pHdr + 1;
|
|---|
| 105 | return VINF_SUCCESS;
|
|---|
| 106 | }
|
|---|
| 107 | RT_EXPORT_SYMBOL(RTMemAllocExTag);
|
|---|
| 108 |
|
|---|
| 109 |
|
|---|
| 110 | RTDECL(void) RTMemFreeEx(void *pv, size_t cb) RT_NO_THROW_DEF
|
|---|
| 111 | {
|
|---|
| 112 | if (!pv)
|
|---|
| 113 | return;
|
|---|
| 114 | AssertPtr(pv);
|
|---|
| 115 |
|
|---|
| 116 | PRTMEMHDRR3 pHdr = (PRTMEMHDRR3)pv - 1;
|
|---|
| 117 | AssertMsg(pHdr->u32Magic == RTMEMHDR_MAGIC, ("pHdr->u32Magic=%RX32 pv=%p cb=%#x\n", pHdr->u32Magic, pv, cb));
|
|---|
| 118 | pHdr->u32Magic = RTMEMHDR_MAGIC_DEAD;
|
|---|
| 119 | Assert(pHdr->cbReq == cb); RT_NOREF_PV(cb);
|
|---|
| 120 |
|
|---|
| 121 | if (pHdr->fFlags & (RTMEMALLOCEX_FLAGS_16BIT_REACH | RTMEMALLOCEX_FLAGS_32BIT_REACH))
|
|---|
| 122 | rtMemFreeExYyBitReach(pHdr, pHdr->cb + sizeof(*pHdr), pHdr->fFlags);
|
|---|
| 123 | else if (pHdr->fFlags & RTMEMALLOCEX_FLAGS_EXEC)
|
|---|
| 124 | RTMemExecFree(pHdr, pHdr->cb + sizeof(*pHdr));
|
|---|
| 125 | else
|
|---|
| 126 | RTMemFree(pHdr);
|
|---|
| 127 | }
|
|---|
| 128 | RT_EXPORT_SYMBOL(RTMemFreeEx);
|
|---|
| 129 |
|
|---|
