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Diffstat (limited to '')
| -rw-r--r-- | src/VBox/Runtime/r0drv/alloc-r0drv.cpp | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/alloc-r0drv.cpp b/src/VBox/Runtime/r0drv/alloc-r0drv.cpp new file mode 100644 index 00000000..5c4d12b5 --- /dev/null +++ b/src/VBox/Runtime/r0drv/alloc-r0drv.cpp @@ -0,0 +1,438 @@ +/* $Id: alloc-r0drv.cpp $ */ +/** @file + * IPRT - Memory Allocation, Ring-0 Driver. + */ + +/* + * 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 * +*********************************************************************************************************************************/ +#define RTMEM_NO_WRAP_TO_EF_APIS +#include <iprt/mem.h> +#include "internal/iprt.h" + +#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86) +# include <iprt/asm-amd64-x86.h> +#endif +#include <iprt/assert.h> +#include <iprt/err.h> +#ifdef RT_MORE_STRICT +# include <iprt/mp.h> +#endif +#include <iprt/param.h> +#include <iprt/string.h> +#include <iprt/thread.h> +#include "r0drv/alloc-r0drv.h" + + +/********************************************************************************************************************************* +* Defined Constants And Macros * +*********************************************************************************************************************************/ +#ifdef RT_STRICT +# define RTR0MEM_STRICT +#endif + +#ifdef RTR0MEM_STRICT +# define RTR0MEM_FENCE_EXTRA 16 +#else +# define RTR0MEM_FENCE_EXTRA 0 +#endif + + +/********************************************************************************************************************************* +* Global Variables * +*********************************************************************************************************************************/ +#ifdef RTR0MEM_STRICT +/** Fence data. */ +static uint8_t const g_abFence[RTR0MEM_FENCE_EXTRA] = +{ + 0x77, 0x88, 0x66, 0x99, 0x55, 0xaa, 0x44, 0xbb, + 0x33, 0xcc, 0x22, 0xdd, 0x11, 0xee, 0x00, 0xff +}; +#endif + + +/** + * Wrapper around rtR0MemAllocEx. + * + * @returns Pointer to the allocated memory block header. + * @param cb The number of bytes to allocate (sans header). + * @param fFlags The allocation flags. + */ +DECLINLINE(PRTMEMHDR) rtR0MemAlloc(size_t cb, uint32_t fFlags) +{ + PRTMEMHDR pHdr; + int rc = rtR0MemAllocEx(cb, fFlags, &pHdr); + if (RT_FAILURE(rc)) + return NULL; + return pHdr; +} + + +RTDECL(void *) RTMemTmpAllocTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF +{ + return RTMemAllocTag(cb, pszTag); +} +RT_EXPORT_SYMBOL(RTMemTmpAllocTag); + + +RTDECL(void *) RTMemTmpAllocZTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF +{ + return RTMemAllocZTag(cb, pszTag); +} +RT_EXPORT_SYMBOL(RTMemTmpAllocZTag); + + +RTDECL(void) RTMemTmpFree(void *pv) RT_NO_THROW_DEF +{ + return RTMemFree(pv); +} +RT_EXPORT_SYMBOL(RTMemTmpFree); + + + + + +RTDECL(void *) RTMemAllocTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF +{ + PRTMEMHDR pHdr; + RT_ASSERT_INTS_ON(); + RT_NOREF_PV(pszTag); + + pHdr = rtR0MemAlloc(cb + RTR0MEM_FENCE_EXTRA, 0); + if (pHdr) + { +#ifdef RTR0MEM_STRICT + pHdr->cbReq = (uint32_t)cb; Assert(pHdr->cbReq == cb); + memcpy((uint8_t *)(pHdr + 1) + cb, &g_abFence[0], RTR0MEM_FENCE_EXTRA); +#endif + return pHdr + 1; + } + return NULL; +} +RT_EXPORT_SYMBOL(RTMemAllocTag); + + +RTDECL(void *) RTMemAllocZTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF +{ + PRTMEMHDR pHdr; + RT_ASSERT_INTS_ON(); + RT_NOREF_PV(pszTag); + + pHdr = rtR0MemAlloc(cb + RTR0MEM_FENCE_EXTRA, RTMEMHDR_FLAG_ZEROED); + if (pHdr) + { +#ifdef RTR0MEM_STRICT + pHdr->cbReq = (uint32_t)cb; Assert(pHdr->cbReq == cb); + memcpy((uint8_t *)(pHdr + 1) + cb, &g_abFence[0], RTR0MEM_FENCE_EXTRA); + return memset(pHdr + 1, 0, cb); +#else + return memset(pHdr + 1, 0, pHdr->cb); +#endif + } + return NULL; +} +RT_EXPORT_SYMBOL(RTMemAllocZTag); + + +RTDECL(void *) RTMemAllocVarTag(size_t cbUnaligned, const char *pszTag) +{ + size_t cbAligned; + if (cbUnaligned >= 16) + cbAligned = RT_ALIGN_Z(cbUnaligned, 16); + else + cbAligned = RT_ALIGN_Z(cbUnaligned, sizeof(void *)); + return RTMemAllocTag(cbAligned, pszTag); +} +RT_EXPORT_SYMBOL(RTMemAllocVarTag); + + +RTDECL(void *) RTMemAllocZVarTag(size_t cbUnaligned, const char *pszTag) +{ + size_t cbAligned; + if (cbUnaligned >= 16) + cbAligned = RT_ALIGN_Z(cbUnaligned, 16); + else + cbAligned = RT_ALIGN_Z(cbUnaligned, sizeof(void *)); + return RTMemAllocZTag(cbAligned, pszTag); +} +RT_EXPORT_SYMBOL(RTMemAllocZVarTag); + + +RTDECL(void *) RTMemReallocTag(void *pvOld, size_t cbNew, const char *pszTag) RT_NO_THROW_DEF +{ + PRTMEMHDR pHdrOld; + + /* Free. */ + if (!cbNew && pvOld) + { + RTMemFree(pvOld); + return NULL; + } + + /* Alloc. */ + if (!pvOld) + return RTMemAllocTag(cbNew, pszTag); + + /* + * Realloc. + */ + pHdrOld = (PRTMEMHDR)pvOld - 1; + RT_ASSERT_PREEMPTIBLE(); + + if (pHdrOld->u32Magic == RTMEMHDR_MAGIC) + { + PRTMEMHDR pHdrNew; + + /* If there is sufficient space in the old block and we don't cause + substantial internal fragmentation, reuse the old block. */ + if ( pHdrOld->cb >= cbNew + RTR0MEM_FENCE_EXTRA + && pHdrOld->cb - (cbNew + RTR0MEM_FENCE_EXTRA) <= 128) + { + pHdrOld->cbReq = (uint32_t)cbNew; Assert(pHdrOld->cbReq == cbNew); +#ifdef RTR0MEM_STRICT + memcpy((uint8_t *)(pHdrOld + 1) + cbNew, &g_abFence[0], RTR0MEM_FENCE_EXTRA); +#endif + return pvOld; + } + + /* Allocate a new block and copy over the content. */ + pHdrNew = rtR0MemAlloc(cbNew + RTR0MEM_FENCE_EXTRA, 0); + if (pHdrNew) + { + size_t cbCopy = RT_MIN(pHdrOld->cb, pHdrNew->cb); + memcpy(pHdrNew + 1, pvOld, cbCopy); +#ifdef RTR0MEM_STRICT + pHdrNew->cbReq = (uint32_t)cbNew; Assert(pHdrNew->cbReq == cbNew); + memcpy((uint8_t *)(pHdrNew + 1) + cbNew, &g_abFence[0], RTR0MEM_FENCE_EXTRA); + AssertReleaseMsg(!memcmp((uint8_t *)(pHdrOld + 1) + pHdrOld->cbReq, &g_abFence[0], RTR0MEM_FENCE_EXTRA), + ("pHdr=%p pvOld=%p cbReq=%u cb=%u cbNew=%zu fFlags=%#x\n" + "fence: %.*Rhxs\n" + "expected: %.*Rhxs\n", + pHdrOld, pvOld, pHdrOld->cbReq, pHdrOld->cb, cbNew, pHdrOld->fFlags, + RTR0MEM_FENCE_EXTRA, (uint8_t *)(pHdrOld + 1) + pHdrOld->cbReq, + RTR0MEM_FENCE_EXTRA, &g_abFence[0])); +#endif + rtR0MemFree(pHdrOld); + return pHdrNew + 1; + } + } + else + AssertMsgFailed(("pHdrOld->u32Magic=%RX32 pvOld=%p cbNew=%#zx\n", pHdrOld->u32Magic, pvOld, cbNew)); + + return NULL; +} +RT_EXPORT_SYMBOL(RTMemReallocTag); + + +RTDECL(void) RTMemFree(void *pv) RT_NO_THROW_DEF +{ + PRTMEMHDR pHdr; + RT_ASSERT_INTS_ON(); + + if (!pv) + return; + pHdr = (PRTMEMHDR)pv - 1; + if (pHdr->u32Magic == RTMEMHDR_MAGIC) + { + Assert(!(pHdr->fFlags & RTMEMHDR_FLAG_ALLOC_EX)); + Assert(!(pHdr->fFlags & RTMEMHDR_FLAG_EXEC)); +#ifdef RTR0MEM_STRICT + AssertReleaseMsg(!memcmp((uint8_t *)(pHdr + 1) + pHdr->cbReq, &g_abFence[0], RTR0MEM_FENCE_EXTRA), + ("pHdr=%p pv=%p cbReq=%u cb=%u fFlags=%#x\n" + "fence: %.*Rhxs\n" + "expected: %.*Rhxs\n", + pHdr, pv, pHdr->cbReq, pHdr->cb, pHdr->fFlags, + RTR0MEM_FENCE_EXTRA, (uint8_t *)(pHdr + 1) + pHdr->cbReq, + RTR0MEM_FENCE_EXTRA, &g_abFence[0])); +#endif + rtR0MemFree(pHdr); + } + else + AssertMsgFailed(("pHdr->u32Magic=%RX32 pv=%p\n", pHdr->u32Magic, pv)); +} +RT_EXPORT_SYMBOL(RTMemFree); + + + + + + +RTDECL(void *) RTMemExecAllocTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF +{ + PRTMEMHDR pHdr; +#ifdef RT_OS_SOLARIS /** @todo figure out why */ + RT_ASSERT_INTS_ON(); +#else + RT_ASSERT_PREEMPTIBLE(); +#endif + RT_NOREF_PV(pszTag); + + + pHdr = rtR0MemAlloc(cb + RTR0MEM_FENCE_EXTRA, RTMEMHDR_FLAG_EXEC); + if (pHdr) + { +#ifdef RTR0MEM_STRICT + pHdr->cbReq = (uint32_t)cb; Assert(pHdr->cbReq == cb); + memcpy((uint8_t *)(pHdr + 1) + cb, &g_abFence[0], RTR0MEM_FENCE_EXTRA); +#endif + return pHdr + 1; + } + return NULL; +} +RT_EXPORT_SYMBOL(RTMemExecAllocTag); + + +RTDECL(void) RTMemExecFree(void *pv, size_t cb) RT_NO_THROW_DEF +{ + PRTMEMHDR pHdr; + RT_ASSERT_INTS_ON(); + RT_NOREF_PV(cb); + + if (!pv) + return; + pHdr = (PRTMEMHDR)pv - 1; + if (pHdr->u32Magic == RTMEMHDR_MAGIC) + { + Assert(!(pHdr->fFlags & RTMEMHDR_FLAG_ALLOC_EX)); +#ifdef RTR0MEM_STRICT + AssertReleaseMsg(!memcmp((uint8_t *)(pHdr + 1) + pHdr->cbReq, &g_abFence[0], RTR0MEM_FENCE_EXTRA), + ("pHdr=%p pv=%p cbReq=%u cb=%u fFlags=%#x\n" + "fence: %.*Rhxs\n" + "expected: %.*Rhxs\n", + pHdr, pv, pHdr->cbReq, pHdr->cb, pHdr->fFlags, + RTR0MEM_FENCE_EXTRA, (uint8_t *)(pHdr + 1) + pHdr->cbReq, + RTR0MEM_FENCE_EXTRA, &g_abFence[0])); +#endif + rtR0MemFree(pHdr); + } + else + AssertMsgFailed(("pHdr->u32Magic=%RX32 pv=%p\n", pHdr->u32Magic, pv)); +} +RT_EXPORT_SYMBOL(RTMemExecFree); + + + + +RTDECL(int) RTMemAllocExTag(size_t cb, size_t cbAlignment, uint32_t fFlags, const char *pszTag, void **ppv) RT_NO_THROW_DEF +{ + uint32_t fHdrFlags = RTMEMHDR_FLAG_ALLOC_EX; + PRTMEMHDR pHdr; + int rc; + RT_NOREF_PV(pszTag); + + RT_ASSERT_PREEMPT_CPUID_VAR(); + if (!(fFlags & RTMEMALLOCEX_FLAGS_ANY_CTX_ALLOC)) + RT_ASSERT_INTS_ON(); + + /* + * Fake up some alignment support. + */ + AssertMsgReturn(cbAlignment <= sizeof(void *), ("%zu (%#x)\n", cbAlignment, cbAlignment), VERR_UNSUPPORTED_ALIGNMENT); + if (cb < cbAlignment) + cb = cbAlignment; + + /* + * Validate and convert flags. + */ + AssertMsgReturn(!(fFlags & ~RTMEMALLOCEX_FLAGS_VALID_MASK_R0), ("%#x\n", fFlags), VERR_INVALID_PARAMETER); + if (fFlags & RTMEMALLOCEX_FLAGS_ZEROED) + fHdrFlags |= RTMEMHDR_FLAG_ZEROED; + if (fFlags & RTMEMALLOCEX_FLAGS_EXEC) + fHdrFlags |= RTMEMHDR_FLAG_EXEC; + if (fFlags & RTMEMALLOCEX_FLAGS_ANY_CTX_ALLOC) + fHdrFlags |= RTMEMHDR_FLAG_ANY_CTX_ALLOC; + if (fFlags & RTMEMALLOCEX_FLAGS_ANY_CTX_FREE) + fHdrFlags |= RTMEMHDR_FLAG_ANY_CTX_FREE; + + /* + * Do the allocation. + */ + rc = rtR0MemAllocEx(cb + RTR0MEM_FENCE_EXTRA, fHdrFlags, &pHdr); + if (RT_SUCCESS(rc)) + { + void *pv; + + Assert(pHdr->cbReq == cb + RTR0MEM_FENCE_EXTRA); + Assert((pHdr->fFlags & fFlags) == fFlags); + + /* + * Calc user pointer, initialize the memory if requested, and if + * memory strictness is enable set up the fence. + */ + pv = pHdr + 1; + *ppv = pv; + if (fFlags & RTMEMHDR_FLAG_ZEROED) + memset(pv, 0, pHdr->cb); + +#ifdef RTR0MEM_STRICT + pHdr->cbReq = (uint32_t)cb; + memcpy((uint8_t *)pv + cb, &g_abFence[0], RTR0MEM_FENCE_EXTRA); +#endif + } + else if (rc == VERR_NO_MEMORY && (fFlags & RTMEMALLOCEX_FLAGS_EXEC)) + rc = VERR_NO_EXEC_MEMORY; + + RT_ASSERT_PREEMPT_CPUID(); + return rc; +} +RT_EXPORT_SYMBOL(RTMemAllocExTag); + + +RTDECL(void) RTMemFreeEx(void *pv, size_t cb) RT_NO_THROW_DEF +{ + PRTMEMHDR pHdr; + RT_NOREF_PV(cb); + + if (!pv) + return; + + AssertPtr(pv); + pHdr = (PRTMEMHDR)pv - 1; + if (pHdr->u32Magic == RTMEMHDR_MAGIC) + { + RT_ASSERT_PREEMPT_CPUID_VAR(); + + Assert(pHdr->fFlags & RTMEMHDR_FLAG_ALLOC_EX); + if (!(pHdr->fFlags & RTMEMHDR_FLAG_ANY_CTX_FREE)) + RT_ASSERT_INTS_ON(); + AssertMsg(pHdr->cbReq == cb, ("cbReq=%zu cb=%zu\n", pHdr->cb, cb)); + +#ifdef RTR0MEM_STRICT + AssertReleaseMsg(!memcmp((uint8_t *)(pHdr + 1) + pHdr->cbReq, &g_abFence[0], RTR0MEM_FENCE_EXTRA), + ("pHdr=%p pv=%p cbReq=%u cb=%u fFlags=%#x\n" + "fence: %.*Rhxs\n" + "expected: %.*Rhxs\n", + pHdr, pv, pHdr->cbReq, pHdr->cb, pHdr->fFlags, + RTR0MEM_FENCE_EXTRA, (uint8_t *)(pHdr + 1) + pHdr->cbReq, + RTR0MEM_FENCE_EXTRA, &g_abFence[0])); +#endif + rtR0MemFree(pHdr); + RT_ASSERT_PREEMPT_CPUID(); + } + else + AssertMsgFailed(("pHdr->u32Magic=%RX32 pv=%p\n", pHdr->u32Magic, pv)); +} +RT_EXPORT_SYMBOL(RTMemFreeEx); + |