[40518] | 1 | /* $Id: SUPDrvTracer.cpp 62665 2016-07-28 23:44:29Z vboxsync $ */
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| 2 | /** @file
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[40777] | 3 | * VBoxDrv - The VirtualBox Support Driver - Tracer Interface.
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[40518] | 4 | */
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| 5 |
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| 6 | /*
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[62490] | 7 | * Copyright (C) 2012-2016 Oracle Corporation
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[40518] | 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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[57358] | 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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[40518] | 31 | #define LOG_GROUP LOG_GROUP_SUP_DRV
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[40756] | 32 | #define SUPDRV_AGNOSTIC
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[40518] | 33 | #include "SUPDrvInternal.h"
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| 34 |
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| 35 | #include <VBox/err.h>
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[40605] | 36 | #include <VBox/log.h>
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[40600] | 37 | #include <VBox/VBoxTpG.h>
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[40602] | 38 |
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[40518] | 39 | #include <iprt/assert.h>
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[40602] | 40 | #include <iprt/ctype.h>
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| 41 | #include <iprt/list.h>
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| 42 | #include <iprt/mem.h>
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| 43 | #include <iprt/semaphore.h>
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[40636] | 44 | #include <iprt/thread.h>
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[41117] | 45 | #include <iprt/param.h>
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| 46 | #include <iprt/uuid.h>
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[40518] | 47 |
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| 48 |
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[57358] | 49 | /*********************************************************************************************************************************
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| 50 | * Structures and Typedefs *
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| 51 | *********************************************************************************************************************************/
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[41117] | 52 | /** Pointer to a user tracer module registration record. */
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| 53 | typedef struct SUPDRVTRACERUMOD *PSUPDRVTRACERUMOD;
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| 54 |
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[40600] | 55 | /**
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[40756] | 56 | * Data for a tracepoint provider.
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[40600] | 57 | */
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[40756] | 58 | typedef struct SUPDRVTPPROVIDER
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[40600] | 59 | {
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| 60 | /** The entry in the provider list for this image. */
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[40756] | 61 | RTLISTNODE ListEntry;
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[41117] | 62 | /** The entry in the per session provider list for this image. */
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| 63 | RTLISTNODE SessionListEntry;
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[40518] | 64 |
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[40756] | 65 | /** The core structure. */
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| 66 | SUPDRVVDTPROVIDERCORE Core;
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[40600] | 67 |
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| 68 | /** Pointer to the image this provider resides in. NULL if it's a
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| 69 | * driver. */
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[40756] | 70 | PSUPDRVLDRIMAGE pImage;
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[40600] | 71 | /** The session this provider is associated with if registered via
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[40602] | 72 | * SUPR0VtgRegisterDrv. NULL if pImage is set. */
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[40756] | 73 | PSUPDRVSESSION pSession;
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[41117] | 74 | /** The user tracepoint module associated with this provider. NULL if
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| 75 | * pImage is set. */
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| 76 | PSUPDRVTRACERUMOD pUmod;
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[40602] | 77 |
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[40812] | 78 | /** Used to indicate that we've called pfnProviderDeregistered already and it
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| 79 | * failed because the provider was busy. Next time we must try
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| 80 | * pfnProviderDeregisterZombie.
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| 81 | *
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| 82 | * @remarks This does not necessiarly mean the provider is in the zombie
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| 83 | * list. See supdrvTracerCommonDeregisterImpl. */
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[40756] | 84 | bool fZombie;
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| 85 | /** Set if the provider has been successfully registered with the
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| 86 | * tracer. */
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| 87 | bool fRegistered;
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[40704] | 88 | /** The provider name (for logging purposes). */
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[40756] | 89 | char szName[1];
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| 90 | } SUPDRVTPPROVIDER;
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| 91 | /** Pointer to the data for a tracepoint provider. */
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| 92 | typedef SUPDRVTPPROVIDER *PSUPDRVTPPROVIDER;
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[40600] | 93 |
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| 94 |
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[41117] | 95 | /**
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| 96 | * User tracer module VTG data copy.
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| 97 | */
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| 98 | typedef struct SUPDRVVTGCOPY
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| 99 | {
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| 100 | /** Magic (SUDPRVVTGCOPY_MAGIC). */
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| 101 | uint32_t u32Magic;
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| 102 | /** Refernece counter (we expect to share a lot of these). */
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| 103 | uint32_t cRefs;
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| 104 | /** The size of the */
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| 105 | uint32_t cbStrTab;
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| 106 | /** Image type flags. */
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| 107 | uint32_t fFlags;
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| 108 | /** Hash list entry (SUPDRVDEVEXT::aTrackerUmodHash). */
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| 109 | RTLISTNODE ListEntry;
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| 110 | /** The VTG object header.
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| 111 | * The rest of the data follows immediately afterwards. First the object,
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| 112 | * then the probe locations and finally the probe location string table. All
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| 113 | * pointers are fixed up to point within this data. */
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| 114 | VTGOBJHDR Hdr;
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| 115 | } SUPDRVVTGCOPY;
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| 116 | /** Pointer to a VTG object copy. */
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| 117 | typedef SUPDRVVTGCOPY *PSUPDRVVTGCOPY;
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| 118 | /** Magic value for SUPDRVVTGCOPY. */
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| 119 | #define SUDPRVVTGCOPY_MAGIC UINT32_C(0x00080386)
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| 120 |
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| 121 |
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| 122 | /**
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| 123 | * User tracer module registration record.
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| 124 | */
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| 125 | typedef struct SUPDRVTRACERUMOD
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| 126 | {
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| 127 | /** Magic (SUPDRVTRACERUMOD_MAGIC). */
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| 128 | uint32_t u32Magic;
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| 129 | /** List entry. This is anchored in SUPDRVSESSION::UmodList. */
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| 130 | RTLISTNODE ListEntry;
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| 131 | /** The address of the ring-3 VTG header. */
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| 132 | RTR3PTR R3PtrVtgHdr;
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| 133 | /** Pointer to the ring-0 copy of the VTG data. */
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| 134 | PSUPDRVVTGCOPY pVtgCopy;
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| 135 | /** The memory object that locks down the user memory. */
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| 136 | RTR0MEMOBJ hMemObjLock;
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| 137 | /** The memory object that maps the locked memory into kernel space. */
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| 138 | RTR0MEMOBJ hMemObjMap;
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| 139 | /** Pointer to the probe enabled-count array within the mapping. */
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| 140 | uint32_t *pacProbeEnabled;
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| 141 | /** Pointer to the probe location array within the mapping. */
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| 142 | void *pvProbeLocs;
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| 143 | /** The address of the ring-3 probe locations. */
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| 144 | RTR3PTR R3PtrProbeLocs;
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| 145 | /** The lookup table index. */
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| 146 | uint8_t iLookupTable;
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| 147 | /** The module bit count. */
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| 148 | uint8_t cBits;
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| 149 | /** The size of a probe location record. */
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| 150 | uint8_t cbProbeLoc;
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| 151 | /** The number of probe locations. */
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| 152 | uint32_t cProbeLocs;
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| 153 | /** Ring-0 probe location info. */
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| 154 | SUPDRVPROBELOC aProbeLocs[1];
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| 155 | } SUPDRVTRACERUMOD;
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| 156 | /** Magic value for SUPDRVVTGCOPY. */
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| 157 | #define SUPDRVTRACERUMOD_MAGIC UINT32_C(0x00080486)
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| 158 |
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| 159 |
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[57358] | 160 | /*********************************************************************************************************************************
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| 161 | * Defined Constants And Macros *
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| 162 | *********************************************************************************************************************************/
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[40867] | 163 | /** Simple SUPR0Printf-style logging. */
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[40812] | 164 | #ifdef DEBUG_bird
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[40756] | 165 | # define LOG_TRACER(a_Args) SUPR0Printf a_Args
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[40704] | 166 | #else
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[40756] | 167 | # define LOG_TRACER(a_Args) do { } while (0)
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[40704] | 168 | #endif
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| 169 |
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[40518] | 170 |
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[57358] | 171 | /*********************************************************************************************************************************
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| 172 | * Global Variables *
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| 173 | *********************************************************************************************************************************/
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[40777] | 174 | /** The address of the current probe fire routine for kernel mode. */
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[40781] | 175 | PFNRT g_pfnSupdrvProbeFireKernel = supdrvTracerProbeFireStub;
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[40518] | 176 |
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| 177 |
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[57358] | 178 | /*********************************************************************************************************************************
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| 179 | * Internal Functions *
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| 180 | *********************************************************************************************************************************/
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[41117] | 181 | static void supdrvVtgReleaseObjectCopy(PSUPDRVDEVEXT pDevExt, PSUPDRVVTGCOPY pThis);
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[40763] | 182 |
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[41117] | 183 |
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| 184 |
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[40763] | 185 | /**
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| 186 | * Validates a VTG string against length and characterset limitations.
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| 187 | *
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| 188 | * @returns VINF_SUCCESS, VERR_SUPDRV_VTG_BAD_STRING or
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| 189 | * VERR_SUPDRV_VTG_STRING_TOO_LONG.
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| 190 | * @param psz The string.
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| 191 | */
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[40601] | 192 | static int supdrvVtgValidateString(const char *psz)
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| 193 | {
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| 194 | size_t off = 0;
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| 195 | while (off < _4K)
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| 196 | {
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| 197 | char const ch = psz[off++];
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| 198 | if (!ch)
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| 199 | return VINF_SUCCESS;
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[40602] | 200 | if ( !RTLocCIsAlNum(ch)
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[40601] | 201 | && ch != ' '
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[40612] | 202 | && ch != '_'
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| 203 | && ch != '-'
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[40601] | 204 | && ch != '('
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| 205 | && ch != ')'
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| 206 | && ch != ','
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| 207 | && ch != '*'
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[40602] | 208 | && ch != '&'
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[40601] | 209 | )
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[40612] | 210 | {
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| 211 | /*RTAssertMsg2("off=%u '%s'\n", off, psz);*/
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[40601] | 212 | return VERR_SUPDRV_VTG_BAD_STRING;
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[40612] | 213 | }
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[40601] | 214 | }
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| 215 | return VERR_SUPDRV_VTG_STRING_TOO_LONG;
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| 216 | }
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| 217 |
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[40763] | 218 |
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[41117] | 219 | /** Used by the validation code below. */
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| 220 | #define MY_CHECK_RET(a_Expr, a_rc) \
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| 221 | MY_CHECK_MSG_RET(a_Expr, ("%s: Validation failed on line " RT_XSTR(__LINE__) ": " #a_Expr "\n", __FUNCTION__), a_rc)
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| 222 |
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| 223 | /** Used by the validation code below. */
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| 224 | #define MY_CHECK_MSG_RET(a_Expr, a_PrintfArgs, a_rc) \
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| 225 | do { if (RT_UNLIKELY(!(a_Expr))) { SUPR0Printf a_PrintfArgs; return (a_rc); } } while (0)
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| 226 |
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| 227 | /** Used by the validation code below. */
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| 228 | #define MY_WITHIN_IMAGE(p, rc) \
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| 229 | do { \
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| 230 | if (pbImage) \
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| 231 | { \
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| 232 | if ((uintptr_t)(p) - (uintptr_t)pbImage > cbImage) \
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| 233 | { \
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| 234 | SUPR0Printf("supdrvVtgValidate: " #rc " - p=%p pbImage=%p cbImage=%#zxline=%u %s\n", \
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| 235 | p, pbImage, cbImage, #p); \
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| 236 | return (rc); \
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| 237 | } \
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| 238 | } \
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| 239 | else if (!RT_VALID_PTR(p)) \
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| 240 | return (rc); \
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| 241 | } while (0)
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| 242 |
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| 243 |
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[40602] | 244 | /**
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[41117] | 245 | * Validates the VTG object header.
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[40602] | 246 | *
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[40600] | 247 | * @returns VBox status code.
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[41117] | 248 | * @param pVtgHdr The header.
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| 249 | * @param uVtgHdrAddr The address where the header is actually
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| 250 | * loaded.
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| 251 | * @param pbImage The image base, if available.
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| 252 | * @param cbImage The image size, if available.
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| 253 | * @param fUmod Whether this is a user module.
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[40600] | 254 | */
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[41117] | 255 | static int supdrvVtgValidateHdr(PVTGOBJHDR pVtgHdr, RTUINTPTR uVtgHdrAddr, const uint8_t *pbImage, size_t cbImage, bool fUmod)
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[40600] | 256 | {
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[41117] | 257 | struct VTGAREAS
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[40601] | 258 | {
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[41117] | 259 | uint32_t off;
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| 260 | uint32_t cb;
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| 261 | } const *paAreas;
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| 262 | unsigned cAreas;
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| 263 | unsigned i;
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| 264 | uint32_t cbVtgObj;
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| 265 | uint32_t off;
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[40601] | 266 |
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[41117] | 267 | #define MY_VALIDATE_SIZE(cb, cMin, cMax, cbUnit, rcBase) \
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[40600] | 268 | do { \
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| 269 | if ((cb) < (cMin) * (cbUnit)) \
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[40851] | 270 | { \
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[41117] | 271 | SUPR0Printf("supdrvVtgValidateHdr: " #rcBase "_TOO_FEW - cb=%#zx cMin=%#zx cbUnit=%#zx line=%u %s\n", \
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| 272 | (size_t)(cb), (size_t)(cMin), (size_t)cbUnit, __LINE__, #cb); \
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[40602] | 273 | return rcBase ## _TOO_FEW; \
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[40851] | 274 | } \
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[40600] | 275 | if ((cb) >= (cMax) * (cbUnit)) \
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[40851] | 276 | { \
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[41117] | 277 | SUPR0Printf("supdrvVtgValidateHdr: " #rcBase "_TOO_MUCH - cb=%#zx cMax=%#zx cbUnit=%#zx line=%u %s\n", \
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| 278 | (size_t)(cb), (size_t)(cMax), (size_t)cbUnit, __LINE__, #cb); \
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[40602] | 279 | return rcBase ## _TOO_MUCH; \
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[40851] | 280 | } \
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[40600] | 281 | if ((cb) / (cbUnit) * (cbUnit) != (cb)) \
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[40851] | 282 | { \
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[41117] | 283 | SUPR0Printf("supdrvVtgValidateHdr: " #rcBase "_NOT_MULTIPLE - cb=%#zx cbUnit=%#zx line=%u %s\n", \
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| 284 | (size_t)(cb), (size_t)cbUnit, __LINE__, #cb); \
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[40602] | 285 | return rcBase ## _NOT_MULTIPLE; \
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[40851] | 286 | } \
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[40600] | 287 | } while (0)
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[41117] | 288 |
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| 289 | #define MY_VALIDATE_OFF(off, cb, cMin, cMax, cbUnit, cbAlign, rcBase) \
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[40601] | 290 | do { \
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[41117] | 291 | if ( (cb) >= cbVtgObj \
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| 292 | || off > cbVtgObj - (cb) ) \
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[40601] | 293 | { \
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[41117] | 294 | SUPR0Printf("supdrvVtgValidateHdr: " #rcBase "_OFF - off=%#x cb=%#x pVtgHdr=%p cbVtgHdr=%#zx line=%u %s\n", \
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| 295 | (off), (cb), pVtgHdr, cbVtgObj, __LINE__, #off); \
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| 296 | return rcBase ## _OFF; \
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[40601] | 297 | } \
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[41117] | 298 | if (RT_ALIGN(off, cbAlign) != (off)) \
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| 299 | { \
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| 300 | SUPR0Printf("supdrvVtgValidateHdr: " #rcBase "_OFF - off=%#x align=%#zx line=%u %s\n", \
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| 301 | (off), (size_t)(cbAlign), __LINE__, #off); \
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| 302 | return rcBase ## _OFF; \
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| 303 | } \
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| 304 | MY_VALIDATE_SIZE(cb, cMin, cMax, cbUnit, rcBase); \
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[40601] | 305 | } while (0)
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[40600] | 306 |
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[40601] | 307 | /*
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[41117] | 308 | * Make sure both pbImage and cbImage are NULL/0 if one if of them is.
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[40601] | 309 | */
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[41117] | 310 | if (!pbImage || !cbImage)
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| 311 | {
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| 312 | pbImage = NULL;
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| 313 | cbImage = 0;
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| 314 | cbVtgObj = pVtgHdr->cbObj;
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| 315 | }
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| 316 | else
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| 317 | {
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| 318 | MY_WITHIN_IMAGE(pVtgHdr, VERR_SUPDRV_VTG_BAD_HDR_PTR);
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| 319 | cbVtgObj = pVtgHdr->cbObj;
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| 320 | MY_WITHIN_IMAGE((uint8_t *)pVtgHdr + cbVtgObj - 1, VERR_SUPDRV_VTG_BAD_HDR_PTR);
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| 321 | }
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| 322 |
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| 323 | if (cbVtgObj > _1M)
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| 324 | {
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| 325 | SUPR0Printf("supdrvVtgValidateHdr: VERR_SUPDRV_TRACER_TOO_LARGE - cbVtgObj=%#x\n", cbVtgObj);
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| 326 | return VERR_SUPDRV_TRACER_TOO_LARGE;
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| 327 | }
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| 328 |
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| 329 | /*
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| 330 | * Set the probe location array offset and size members.
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| 331 | */
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| 332 | if (!pVtgHdr->offProbeLocs)
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| 333 | {
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| 334 | uint64_t u64Tmp = pVtgHdr->uProbeLocsEnd.u64 - pVtgHdr->uProbeLocs.u64;
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| 335 | if (u64Tmp >= UINT32_MAX)
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[41147] | 336 | {
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[41311] | 337 | SUPR0Printf("supdrvVtgValidateHdr: VERR_SUPDRV_VTG_BAD_HDR_TOO_MUCH - u64Tmp=%#llx ProbeLocs=%#llx ProbeLocsEnd=%#llx\n",
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[41147] | 338 | u64Tmp, pVtgHdr->uProbeLocs.u64, pVtgHdr->uProbeLocsEnd.u64);
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[41117] | 339 | return VERR_SUPDRV_VTG_BAD_HDR_TOO_MUCH;
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[41147] | 340 | }
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[49143] | 341 | /*SUPR0Printf("supdrvVtgValidateHdr: cbProbeLocs %#x -> %#x\n", pVtgHdr->cbProbeLocs, (uint32_t)u64Tmp);*/
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[41117] | 342 | pVtgHdr->cbProbeLocs = (uint32_t)u64Tmp;
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| 343 |
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| 344 | u64Tmp = pVtgHdr->uProbeLocs.u64 - uVtgHdrAddr;
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[41311] | 345 | #ifdef RT_OS_DARWIN
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| 346 | /* The loader and/or ld64-97.17 seems not to generate fixups for our
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| 347 | __VTGObj section. Detect this by comparing them with the
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[47518] | 348 | u64VtgObjSectionStart member and assume max image size of 4MB.
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| 349 | Seems to be worked around by the __VTGPrLc.End and __VTGPrLc.Begin
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| 350 | padding fudge, meaning that the linker misplaced the relocations. */
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[41311] | 351 | if ( (int64_t)u64Tmp != (int32_t)u64Tmp
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| 352 | && pVtgHdr->u64VtgObjSectionStart != uVtgHdrAddr
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| 353 | && pVtgHdr->u64VtgObjSectionStart < _4M
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| 354 | && pVtgHdr->uProbeLocsEnd.u64 < _4M
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| 355 | && !fUmod)
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| 356 | {
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| 357 | uint64_t offDelta = uVtgHdrAddr - pVtgHdr->u64VtgObjSectionStart;
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[49143] | 358 | /*SUPR0Printf("supdrvVtgValidateHdr: offDelta=%#llx\n", offDelta);*/
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[41311] | 359 | pVtgHdr->uProbeLocs.u64 += offDelta;
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| 360 | pVtgHdr->uProbeLocsEnd.u64 += offDelta;
|
---|
| 361 | u64Tmp += offDelta;
|
---|
| 362 | }
|
---|
| 363 | #endif
|
---|
[41117] | 364 | if ((int64_t)u64Tmp != (int32_t)u64Tmp)
|
---|
[41147] | 365 | {
|
---|
[41311] | 366 | SUPR0Printf("supdrvVtgValidateHdr: VERR_SUPDRV_VTG_BAD_HDR_PTR - u64Tmp=%#llx uProbeLocs=%#llx uVtgHdrAddr=%RTptr\n",
|
---|
[41147] | 367 | u64Tmp, pVtgHdr->uProbeLocs.u64, uVtgHdrAddr);
|
---|
[41117] | 368 | return VERR_SUPDRV_VTG_BAD_HDR_PTR;
|
---|
[41147] | 369 | }
|
---|
[49143] | 370 | /*SUPR0Printf("supdrvVtgValidateHdr: offProbeLocs %#x -> %#x\n", pVtgHdr->offProbeLocs, (int32_t)u64Tmp);*/
|
---|
[41117] | 371 | pVtgHdr->offProbeLocs = (int32_t)u64Tmp;
|
---|
| 372 | }
|
---|
| 373 |
|
---|
| 374 | /*
|
---|
| 375 | * The non-area description fields.
|
---|
| 376 | */
|
---|
[40612] | 377 | if (memcmp(pVtgHdr->szMagic, VTGOBJHDR_MAGIC, sizeof(pVtgHdr->szMagic)))
|
---|
[49143] | 378 | {
|
---|
| 379 | SUPR0Printf("supdrvVtgValidateHdr: %p: %.16Rhxs\n", pVtgHdr, pVtgHdr->szMagic);
|
---|
[40601] | 380 | return VERR_SUPDRV_VTG_MAGIC;
|
---|
[49143] | 381 | }
|
---|
[41117] | 382 | if ( pVtgHdr->cBits != ARCH_BITS
|
---|
| 383 | && ( !fUmod
|
---|
| 384 | || ( pVtgHdr->cBits != 32
|
---|
| 385 | && pVtgHdr->cBits != 64)) )
|
---|
[40601] | 386 | return VERR_SUPDRV_VTG_BITS;
|
---|
[41311] | 387 | MY_CHECK_RET(pVtgHdr->au32Reserved1[0] == 0, VERR_SUPDRV_VTG_BAD_HDR_MISC);
|
---|
| 388 | MY_CHECK_RET(pVtgHdr->au32Reserved1[1] == 0, VERR_SUPDRV_VTG_BAD_HDR_MISC);
|
---|
| 389 | MY_CHECK_RET(!RTUuidIsNull(&pVtgHdr->Uuid), VERR_SUPDRV_VTG_BAD_HDR_MISC);
|
---|
[40600] | 390 |
|
---|
[41117] | 391 | /*
|
---|
| 392 | * Check the individual area descriptors.
|
---|
| 393 | */
|
---|
| 394 | MY_VALIDATE_OFF(pVtgHdr->offStrTab, pVtgHdr->cbStrTab, 4, _1M, sizeof(char), sizeof(uint8_t), VERR_SUPDRV_VTG_BAD_HDR);
|
---|
| 395 | MY_VALIDATE_OFF(pVtgHdr->offArgLists, pVtgHdr->cbArgLists, 1, _32K, sizeof(uint32_t), sizeof(uint32_t), VERR_SUPDRV_VTG_BAD_HDR);
|
---|
| 396 | MY_VALIDATE_OFF(pVtgHdr->offProbes, pVtgHdr->cbProbes, 1, _32K, sizeof(VTGDESCPROBE), sizeof(uint32_t), VERR_SUPDRV_VTG_BAD_HDR);
|
---|
| 397 | MY_VALIDATE_OFF(pVtgHdr->offProviders, pVtgHdr->cbProviders, 1, 16, sizeof(VTGDESCPROVIDER), sizeof(uint32_t), VERR_SUPDRV_VTG_BAD_HDR);
|
---|
| 398 | MY_VALIDATE_OFF(pVtgHdr->offProbeEnabled, pVtgHdr->cbProbeEnabled, 1, _32K, sizeof(uint32_t), sizeof(uint32_t), VERR_SUPDRV_VTG_BAD_HDR);
|
---|
| 399 | if (!fUmod)
|
---|
| 400 | {
|
---|
| 401 | MY_WITHIN_IMAGE(pVtgHdr->uProbeLocs.p, VERR_SUPDRV_VTG_BAD_HDR_PTR);
|
---|
| 402 | MY_WITHIN_IMAGE(pVtgHdr->uProbeLocsEnd.p, VERR_SUPDRV_VTG_BAD_HDR_PTR);
|
---|
| 403 | MY_VALIDATE_SIZE( pVtgHdr->cbProbeLocs, 1, _128K, sizeof(VTGPROBELOC), VERR_SUPDRV_VTG_BAD_HDR);
|
---|
| 404 | }
|
---|
| 405 | else
|
---|
| 406 | {
|
---|
| 407 | if (pVtgHdr->cBits == 32)
|
---|
| 408 | MY_VALIDATE_SIZE( pVtgHdr->cbProbeLocs, 1, _8K, sizeof(VTGPROBELOC32), VERR_SUPDRV_VTG_BAD_HDR);
|
---|
| 409 | else
|
---|
| 410 | MY_VALIDATE_SIZE( pVtgHdr->cbProbeLocs, 1, _8K, sizeof(VTGPROBELOC64), VERR_SUPDRV_VTG_BAD_HDR);
|
---|
| 411 | /* Will check later that offProbeLocs are following closely on the
|
---|
| 412 | enable count array, so no need to validate the offset here. */
|
---|
| 413 | }
|
---|
[40612] | 414 |
|
---|
[41117] | 415 | /*
|
---|
| 416 | * Some additional consistency checks.
|
---|
| 417 | */
|
---|
| 418 | if ( pVtgHdr->uProbeLocsEnd.u64 - pVtgHdr->uProbeLocs.u64 != pVtgHdr->cbProbeLocs
|
---|
| 419 | || (int64_t)(pVtgHdr->uProbeLocs.u64 - uVtgHdrAddr) != pVtgHdr->offProbeLocs)
|
---|
[40851] | 420 | {
|
---|
[41117] | 421 | SUPR0Printf("supdrvVtgValidateHdr: VERR_SUPDRV_VTG_BAD_HDR_MISC - uProbeLocs=%#llx uProbeLocsEnd=%#llx offProbeLocs=%#llx cbProbeLocs=%#x uVtgHdrAddr=%RTptr\n",
|
---|
| 422 | pVtgHdr->uProbeLocs.u64, pVtgHdr->uProbeLocsEnd.u64, pVtgHdr->offProbeLocs, pVtgHdr->cbProbeLocs, uVtgHdrAddr);
|
---|
| 423 | return VERR_SUPDRV_VTG_BAD_HDR_MISC;
|
---|
[40851] | 424 | }
|
---|
[41117] | 425 |
|
---|
| 426 | if (pVtgHdr->cbProbes / sizeof(VTGDESCPROBE) != pVtgHdr->cbProbeEnabled / sizeof(uint32_t))
|
---|
[40851] | 427 | {
|
---|
[41117] | 428 | SUPR0Printf("supdrvVtgValidateHdr: VERR_SUPDRV_VTG_BAD_HDR_MISC - cbProbeEnabled=%#zx cbProbes=%#zx\n",
|
---|
| 429 | pVtgHdr->cbProbeEnabled, pVtgHdr->cbProbes);
|
---|
| 430 | return VERR_SUPDRV_VTG_BAD_HDR_MISC;
|
---|
[40851] | 431 | }
|
---|
[41117] | 432 |
|
---|
| 433 | /*
|
---|
| 434 | * Check that there are no overlapping areas. This is a little bit ugly...
|
---|
| 435 | */
|
---|
| 436 | paAreas = (struct VTGAREAS const *)&pVtgHdr->offStrTab;
|
---|
| 437 | cAreas = pVtgHdr->offProbeLocs >= 0 ? 6 : 5;
|
---|
| 438 | off = sizeof(VTGOBJHDR);
|
---|
| 439 | for (i = 0; i < cAreas; i++)
|
---|
[40851] | 440 | {
|
---|
[41117] | 441 | if (paAreas[i].off < off)
|
---|
| 442 | {
|
---|
| 443 | SUPR0Printf("supdrvVtgValidateHdr: VERR_SUPDRV_VTG_BAD_HDR_MISC - overlapping areas %d and %d\n", i, i-1);
|
---|
| 444 | return VERR_SUPDRV_VTG_BAD_HDR_MISC;
|
---|
| 445 | }
|
---|
| 446 | off = paAreas[i].off + paAreas[i].cb;
|
---|
[40851] | 447 | }
|
---|
[41117] | 448 | if ( pVtgHdr->offProbeLocs > 0
|
---|
| 449 | && (uint32_t)-pVtgHdr->offProbeLocs < pVtgHdr->cbProbeLocs)
|
---|
[40851] | 450 | {
|
---|
[41117] | 451 | SUPR0Printf("supdrvVtgValidateHdr: VERR_SUPDRV_VTG_BAD_HDR_MISC - probe locations overlaps the header\n");
|
---|
| 452 | return VERR_SUPDRV_VTG_BAD_HDR_MISC;
|
---|
[40851] | 453 | }
|
---|
[40601] | 454 |
|
---|
[41117] | 455 | /*
|
---|
| 456 | * Check that the object size is correct.
|
---|
| 457 | */
|
---|
| 458 | if (pVtgHdr->cbObj != pVtgHdr->offProbeEnabled + pVtgHdr->cbProbeEnabled)
|
---|
[40851] | 459 | {
|
---|
[41117] | 460 | SUPR0Printf("supdrvVtgValidateHdr: VERR_SUPDRV_VTG_BAD_HDR_MISC - bad header size %#x, expected %#x\n",
|
---|
| 461 | pVtgHdr->cbObj, pVtgHdr->offProbeEnabled + pVtgHdr->cbProbeEnabled);
|
---|
| 462 | return VERR_SUPDRV_VTG_BAD_HDR_MISC;
|
---|
[40851] | 463 | }
|
---|
[40601] | 464 |
|
---|
[41117] | 465 |
|
---|
| 466 | return VINF_SUCCESS;
|
---|
| 467 | #undef MY_VALIDATE_OFF
|
---|
| 468 | #undef MY_VALIDATE_SIZE
|
---|
| 469 | }
|
---|
| 470 |
|
---|
| 471 |
|
---|
| 472 | /**
|
---|
| 473 | * Validates the VTG data.
|
---|
| 474 | *
|
---|
| 475 | * @returns VBox status code.
|
---|
| 476 | * @param pVtgHdr The VTG object header of the data to validate.
|
---|
| 477 | * @param uVtgHdrAddr The address where the header is actually
|
---|
| 478 | * loaded.
|
---|
| 479 | * @param pbImage The image base. For validating the probe
|
---|
| 480 | * locations.
|
---|
| 481 | * @param cbImage The image size to go with @a pbImage.
|
---|
| 482 | * @param fUmod Whether this is a user module.
|
---|
| 483 | */
|
---|
| 484 | static int supdrvVtgValidate(PVTGOBJHDR pVtgHdr, RTUINTPTR uVtgHdrAddr, const uint8_t *pbImage, size_t cbImage, bool fUmod)
|
---|
| 485 | {
|
---|
| 486 | uintptr_t offTmp;
|
---|
| 487 | uintptr_t i;
|
---|
| 488 | uintptr_t cProviders;
|
---|
| 489 | int rc;
|
---|
| 490 |
|
---|
| 491 | if (!pbImage || !cbImage)
|
---|
| 492 | {
|
---|
| 493 | pbImage = NULL;
|
---|
| 494 | cbImage = 0;
|
---|
| 495 | }
|
---|
| 496 |
|
---|
| 497 | #define MY_VALIDATE_STR(a_offStrTab) \
|
---|
| 498 | do { \
|
---|
| 499 | if ((a_offStrTab) >= pVtgHdr->cbStrTab) \
|
---|
| 500 | return VERR_SUPDRV_VTG_STRTAB_OFF; \
|
---|
| 501 | rc = supdrvVtgValidateString((char *)pVtgHdr + pVtgHdr->offStrTab + (a_offStrTab)); \
|
---|
| 502 | if (rc != VINF_SUCCESS) \
|
---|
| 503 | return rc; \
|
---|
| 504 | } while (0)
|
---|
| 505 | #define MY_VALIDATE_ATTR(Attr) \
|
---|
| 506 | do { \
|
---|
| 507 | if ((Attr).u8Code <= (uint8_t)kVTGStability_Invalid || (Attr).u8Code >= (uint8_t)kVTGStability_End) \
|
---|
| 508 | return VERR_SUPDRV_VTG_BAD_ATTR; \
|
---|
| 509 | if ((Attr).u8Data <= (uint8_t)kVTGStability_Invalid || (Attr).u8Data >= (uint8_t)kVTGStability_End) \
|
---|
| 510 | return VERR_SUPDRV_VTG_BAD_ATTR; \
|
---|
| 511 | if ((Attr).u8DataDep <= (uint8_t)kVTGClass_Invalid || (Attr).u8DataDep >= (uint8_t)kVTGClass_End) \
|
---|
| 512 | return VERR_SUPDRV_VTG_BAD_ATTR; \
|
---|
| 513 | } while (0)
|
---|
| 514 |
|
---|
[40601] | 515 | /*
|
---|
[41117] | 516 | * The header.
|
---|
| 517 | */
|
---|
| 518 | rc = supdrvVtgValidateHdr(pVtgHdr, uVtgHdrAddr, pbImage, cbImage, fUmod);
|
---|
| 519 | if (RT_FAILURE(rc))
|
---|
| 520 | return rc;
|
---|
| 521 |
|
---|
| 522 | /*
|
---|
[40601] | 523 | * Validate the providers.
|
---|
| 524 | */
|
---|
[40602] | 525 | cProviders = i = pVtgHdr->cbProviders / sizeof(VTGDESCPROVIDER);
|
---|
[40601] | 526 | while (i-- > 0)
|
---|
[40600] | 527 | {
|
---|
[41117] | 528 | PCVTGDESCPROVIDER pProvider = (PCVTGDESCPROVIDER)((uintptr_t)pVtgHdr + pVtgHdr->offProviders) + i;
|
---|
| 529 |
|
---|
| 530 | MY_VALIDATE_STR(pProvider->offName);
|
---|
| 531 | MY_CHECK_RET(pProvider->iFirstProbe < pVtgHdr->cbProbeEnabled / sizeof(uint32_t), VERR_SUPDRV_VTG_BAD_PROVIDER);
|
---|
| 532 | MY_CHECK_RET((uint32_t)pProvider->iFirstProbe + pProvider->cProbes <= pVtgHdr->cbProbeEnabled / sizeof(uint32_t),
|
---|
| 533 | VERR_SUPDRV_VTG_BAD_PROVIDER);
|
---|
| 534 | MY_VALIDATE_ATTR(pProvider->AttrSelf);
|
---|
| 535 | MY_VALIDATE_ATTR(pProvider->AttrModules);
|
---|
| 536 | MY_VALIDATE_ATTR(pProvider->AttrFunctions);
|
---|
| 537 | MY_VALIDATE_ATTR(pProvider->AttrNames);
|
---|
| 538 | MY_VALIDATE_ATTR(pProvider->AttrArguments);
|
---|
| 539 | MY_CHECK_RET(pProvider->bReserved == 0, VERR_SUPDRV_VTG_BAD_PROVIDER);
|
---|
[58920] | 540 | MY_CHECK_RET(pProvider->cProbesEnabled == 0, VERR_SUPDRV_VTG_BAD_PROVIDER);
|
---|
[58976] | 541 | MY_CHECK_RET(pProvider->uSettingsSerialNo == 0, VERR_SUPDRV_VTG_BAD_PROVIDER);
|
---|
[40600] | 542 | }
|
---|
| 543 |
|
---|
| 544 | /*
|
---|
[40601] | 545 | * Validate probes.
|
---|
[40600] | 546 | */
|
---|
[40601] | 547 | i = pVtgHdr->cbProbes / sizeof(VTGDESCPROBE);
|
---|
| 548 | while (i-- > 0)
|
---|
| 549 | {
|
---|
[41117] | 550 | PCVTGDESCPROBE pProbe = (PCVTGDESCPROBE)( (uintptr_t)pVtgHdr + pVtgHdr->offProbes) + i;
|
---|
| 551 | PCVTGDESCPROVIDER pProvider = (PCVTGDESCPROVIDER)((uintptr_t)pVtgHdr + pVtgHdr->offProviders) + pProbe->idxProvider;
|
---|
| 552 | PCVTGDESCARGLIST pArgList = (PCVTGDESCARGLIST)( (uintptr_t)pVtgHdr + pVtgHdr->offArgLists + pProbe->offArgList );
|
---|
| 553 | unsigned iArg;
|
---|
| 554 | bool fHaveLargeArgs;
|
---|
[40602] | 555 |
|
---|
[41117] | 556 |
|
---|
| 557 | MY_VALIDATE_STR(pProbe->offName);
|
---|
| 558 | MY_CHECK_RET(pProbe->offArgList < pVtgHdr->cbArgLists, VERR_SUPDRV_VTG_BAD_PROBE);
|
---|
| 559 | MY_CHECK_RET((pProbe->offArgList & 3) == 0, VERR_SUPDRV_VTG_BAD_PROBE);
|
---|
| 560 | MY_CHECK_RET(pProbe->idxEnabled == i, VERR_SUPDRV_VTG_BAD_PROBE); /* The lists are parallel. */
|
---|
| 561 | MY_CHECK_RET(pProbe->idxProvider < cProviders, VERR_SUPDRV_VTG_BAD_PROBE);
|
---|
| 562 | MY_CHECK_RET(i - pProvider->iFirstProbe < pProvider->cProbes, VERR_SUPDRV_VTG_BAD_PROBE);
|
---|
| 563 | if (pProbe->offObjHdr != (intptr_t)pVtgHdr - (intptr_t)pProbe)
|
---|
[40892] | 564 | {
|
---|
[41338] | 565 | SUPR0Printf("supdrvVtgValidate: VERR_SUPDRV_VTG_BAD_PROBE - iProbe=%u offObjHdr=%d expected %zd\n",
|
---|
[41117] | 566 | i, pProbe->offObjHdr, (intptr_t)pVtgHdr - (intptr_t)pProbe);
|
---|
[40892] | 567 | return VERR_SUPDRV_VTG_BAD_PROBE;
|
---|
| 568 | }
|
---|
[40602] | 569 |
|
---|
| 570 | /* The referenced argument list. */
|
---|
| 571 | if (pArgList->cArgs > 16)
|
---|
[40886] | 572 | {
|
---|
[41338] | 573 | SUPR0Printf("supdrvVtgValidate: VERR_SUPDRV_VTG_BAD_ARGLIST - iProbe=%u cArgs=%u\n", i, pArgList->cArgs);
|
---|
[40602] | 574 | return VERR_SUPDRV_VTG_BAD_ARGLIST;
|
---|
[40886] | 575 | }
|
---|
[40878] | 576 | if (pArgList->fHaveLargeArgs >= 2)
|
---|
[40886] | 577 | {
|
---|
[41338] | 578 | SUPR0Printf("supdrvVtgValidate: VERR_SUPDRV_VTG_BAD_ARGLIST - iProbe=%u fHaveLargeArgs=%d\n", i, pArgList->fHaveLargeArgs);
|
---|
[40878] | 579 | return VERR_SUPDRV_VTG_BAD_ARGLIST;
|
---|
[40886] | 580 | }
|
---|
[40602] | 581 | if ( pArgList->abReserved[0]
|
---|
[40878] | 582 | || pArgList->abReserved[1])
|
---|
[40886] | 583 | {
|
---|
[41338] | 584 | SUPR0Printf("supdrvVtgValidate: VERR_SUPDRV_VTG_BAD_ARGLIST - reserved MBZ iProbe=%u\n", i);
|
---|
[40602] | 585 | return VERR_SUPDRV_VTG_BAD_ARGLIST;
|
---|
[40886] | 586 | }
|
---|
[40878] | 587 | fHaveLargeArgs = false;
|
---|
[40602] | 588 | iArg = pArgList->cArgs;
|
---|
| 589 | while (iArg-- > 0)
|
---|
| 590 | {
|
---|
[40886] | 591 | uint32_t const fType = pArgList->aArgs[iArg].fType;
|
---|
| 592 | if (fType & ~VTG_TYPE_VALID_MASK)
|
---|
| 593 | {
|
---|
| 594 | SUPR0Printf("supdrvVtgValidate: VERR_SUPDRV_TRACER_BAD_ARG_FLAGS - fType=%#x iArg=%u iProbe=%u (#0)\n", fType, iArg, i);
|
---|
| 595 | return VERR_SUPDRV_TRACER_BAD_ARG_FLAGS;
|
---|
| 596 | }
|
---|
| 597 |
|
---|
[40878] | 598 | switch (pArgList->aArgs[iArg].fType & VTG_TYPE_SIZE_MASK)
|
---|
| 599 | {
|
---|
| 600 | case 0:
|
---|
[40880] | 601 | if (pArgList->aArgs[iArg].fType & VTG_TYPE_FIXED_SIZED)
|
---|
[40886] | 602 | {
|
---|
| 603 | SUPR0Printf("supdrvVtgValidate: VERR_SUPDRV_TRACER_BAD_ARG_FLAGS - fType=%#x iArg=%u iProbe=%u (#1)\n", fType, iArg, i);
|
---|
| 604 | return VERR_SUPDRV_TRACER_BAD_ARG_FLAGS;
|
---|
| 605 | }
|
---|
[40878] | 606 | break;
|
---|
| 607 | case 1: case 2: case 4: case 8:
|
---|
| 608 | break;
|
---|
| 609 | default:
|
---|
[40886] | 610 | SUPR0Printf("supdrvVtgValidate: VERR_SUPDRV_TRACER_BAD_ARG_FLAGS - fType=%#x iArg=%u iProbe=%u (#2)\n", fType, iArg, i);
|
---|
| 611 | return VERR_SUPDRV_TRACER_BAD_ARG_FLAGS;
|
---|
[40878] | 612 | }
|
---|
[40886] | 613 | if (VTG_TYPE_IS_LARGE(pArgList->aArgs[iArg].fType))
|
---|
[40878] | 614 | fHaveLargeArgs = true;
|
---|
[40886] | 615 |
|
---|
| 616 | MY_VALIDATE_STR(pArgList->aArgs[iArg].offType);
|
---|
[40602] | 617 | }
|
---|
[40878] | 618 | if ((uint8_t)fHaveLargeArgs != pArgList->fHaveLargeArgs)
|
---|
[40881] | 619 | {
|
---|
[40886] | 620 | SUPR0Printf("supdrvVtgValidate: VERR_SUPDRV_TRACER_BAD_ARG_FLAGS - iProbe=%u fHaveLargeArgs=%d expected %d\n",
|
---|
| 621 | i, pArgList->fHaveLargeArgs, fHaveLargeArgs);
|
---|
[40878] | 622 | return VERR_SUPDRV_VTG_BAD_PROBE;
|
---|
[40881] | 623 | }
|
---|
[40601] | 624 | }
|
---|
[40600] | 625 |
|
---|
[40602] | 626 | /*
|
---|
[41117] | 627 | * Check that pacProbeEnabled is all zeros.
|
---|
[40602] | 628 | */
|
---|
[41117] | 629 | {
|
---|
| 630 | uint32_t const *pcProbeEnabled = (uint32_t const *)((uintptr_t)pVtgHdr + pVtgHdr->offProbeEnabled);
|
---|
| 631 | i = pVtgHdr->cbProbeEnabled / sizeof(uint32_t);
|
---|
| 632 | while (i-- > 0)
|
---|
| 633 | MY_CHECK_RET(pcProbeEnabled[0] == 0, VERR_SUPDRV_VTG_BAD_PROBE_ENABLED);
|
---|
| 634 | }
|
---|
[40602] | 635 |
|
---|
| 636 | /*
|
---|
| 637 | * Probe locations.
|
---|
| 638 | */
|
---|
| 639 | {
|
---|
[41311] | 640 | PVTGPROBELOC paProbeLocs = (PVTGPROBELOC)((intptr_t)pVtgHdr + pVtgHdr->offProbeLocs);
|
---|
[41117] | 641 | i = pVtgHdr->cbProbeLocs / sizeof(VTGPROBELOC);
|
---|
| 642 | while (i-- > 0)
|
---|
| 643 | {
|
---|
| 644 | MY_CHECK_RET(paProbeLocs[i].uLine < _1G, VERR_SUPDRV_VTG_BAD_PROBE_LOC);
|
---|
| 645 | MY_CHECK_RET(paProbeLocs[i].fEnabled == false, VERR_SUPDRV_VTG_BAD_PROBE_LOC);
|
---|
| 646 | MY_CHECK_RET(paProbeLocs[i].idProbe == 0, VERR_SUPDRV_VTG_BAD_PROBE_LOC);
|
---|
[41130] | 647 | offTmp = (uintptr_t)paProbeLocs[i].pProbe - (uintptr_t)pVtgHdr->offProbes - (uintptr_t)pVtgHdr;
|
---|
[41311] | 648 | #ifdef RT_OS_DARWIN /* See header validation code. */
|
---|
| 649 | if ( offTmp >= pVtgHdr->cbProbes
|
---|
| 650 | && pVtgHdr->u64VtgObjSectionStart != uVtgHdrAddr
|
---|
| 651 | && pVtgHdr->u64VtgObjSectionStart < _4M
|
---|
| 652 | && (uintptr_t)paProbeLocs[i].pProbe < _4M
|
---|
| 653 | && !fUmod )
|
---|
| 654 | {
|
---|
| 655 | uint64_t offDelta = uVtgHdrAddr - pVtgHdr->u64VtgObjSectionStart;
|
---|
[44247] | 656 |
|
---|
[41311] | 657 | paProbeLocs[i].pProbe = (PVTGDESCPROBE)((uintptr_t)paProbeLocs[i].pProbe + offDelta);
|
---|
[44247] | 658 | if ((uintptr_t)paProbeLocs[i].pszFunction < _4M)
|
---|
| 659 | paProbeLocs[i].pszFunction = (const char *)((uintptr_t)paProbeLocs[i].pszFunction + offDelta);
|
---|
| 660 |
|
---|
[41311] | 661 | offTmp += offDelta;
|
---|
| 662 | }
|
---|
| 663 | #endif
|
---|
[41117] | 664 | MY_CHECK_RET(offTmp < pVtgHdr->cbProbes, VERR_SUPDRV_VTG_BAD_PROBE_LOC);
|
---|
| 665 | MY_CHECK_RET(offTmp / sizeof(VTGDESCPROBE) * sizeof(VTGDESCPROBE) == offTmp, VERR_SUPDRV_VTG_BAD_PROBE_LOC);
|
---|
[44247] | 666 | MY_WITHIN_IMAGE(paProbeLocs[i].pszFunction, VERR_SUPDRV_VTG_BAD_PROBE_LOC);
|
---|
[41117] | 667 | }
|
---|
[40602] | 668 | }
|
---|
| 669 |
|
---|
[40600] | 670 | return VINF_SUCCESS;
|
---|
[41117] | 671 | }
|
---|
| 672 |
|
---|
[40601] | 673 | #undef MY_VALIDATE_STR
|
---|
[41117] | 674 | #undef MY_VALIDATE_ATTR
|
---|
[40601] | 675 | #undef MY_WITHIN_IMAGE
|
---|
[40600] | 676 |
|
---|
| 677 |
|
---|
[40518] | 678 | /**
|
---|
[40602] | 679 | * Gets a string from the string table.
|
---|
| 680 | *
|
---|
| 681 | * @returns Pointer to the string.
|
---|
| 682 | * @param pVtgHdr The VTG object header.
|
---|
| 683 | * @param offStrTab The string table offset.
|
---|
| 684 | */
|
---|
| 685 | static const char *supdrvVtgGetString(PVTGOBJHDR pVtgHdr, uint32_t offStrTab)
|
---|
| 686 | {
|
---|
| 687 | Assert(offStrTab < pVtgHdr->cbStrTab);
|
---|
[41117] | 688 | return (char *)pVtgHdr + pVtgHdr->offStrTab + offStrTab;
|
---|
[40602] | 689 | }
|
---|
| 690 |
|
---|
| 691 |
|
---|
| 692 | /**
|
---|
[40756] | 693 | * Frees the provider structure and associated resources.
|
---|
| 694 | *
|
---|
[40675] | 695 | * @param pProv The provider to free.
|
---|
| 696 | */
|
---|
[40756] | 697 | static void supdrvTracerFreeProvider(PSUPDRVTPPROVIDER pProv)
|
---|
[40675] | 698 | {
|
---|
[40813] | 699 | LOG_TRACER(("Freeing tracepoint provider '%s' / %p\n", pProv->szName, pProv->Core.TracerData.DTrace.idProvider));
|
---|
[41117] | 700 | pProv->fRegistered = false;
|
---|
| 701 | pProv->fZombie = true;
|
---|
| 702 | pProv->Core.pDesc = NULL;
|
---|
| 703 | pProv->Core.pHdr = NULL;
|
---|
| 704 | pProv->Core.paProbeLocsRO = NULL;
|
---|
| 705 | pProv->Core.pvProbeLocsEn = NULL;
|
---|
| 706 | pProv->Core.pacProbeEnabled = NULL;
|
---|
| 707 | pProv->Core.paR0ProbeLocs = NULL;
|
---|
| 708 | pProv->Core.paR0Probes = NULL;
|
---|
[40756] | 709 | RT_ZERO(pProv->Core.TracerData);
|
---|
[40675] | 710 | RTMemFree(pProv);
|
---|
| 711 | }
|
---|
| 712 |
|
---|
| 713 |
|
---|
| 714 | /**
|
---|
[41117] | 715 | * Unlinks and deregisters a provider.
|
---|
[40756] | 716 | *
|
---|
[40704] | 717 | * If the provider is still busy, it will be put in the zombie list.
|
---|
[40756] | 718 | *
|
---|
[40704] | 719 | * @param pDevExt The device extension.
|
---|
[40756] | 720 | * @param pProv The provider.
|
---|
| 721 | *
|
---|
| 722 | * @remarks The caller owns mtxTracer.
|
---|
[40704] | 723 | */
|
---|
[40756] | 724 | static void supdrvTracerDeregisterVtgObj(PSUPDRVDEVEXT pDevExt, PSUPDRVTPPROVIDER pProv)
|
---|
[40704] | 725 | {
|
---|
| 726 | int rc;
|
---|
[41117] | 727 |
|
---|
| 728 | RTListNodeRemove(&pProv->ListEntry);
|
---|
| 729 | if (pProv->pSession)
|
---|
| 730 | {
|
---|
| 731 | RTListNodeRemove(&pProv->SessionListEntry);
|
---|
| 732 | RTListInit(&pProv->SessionListEntry);
|
---|
| 733 | pProv->pSession->cTpProviders--;
|
---|
| 734 | }
|
---|
| 735 |
|
---|
[40756] | 736 | if (!pProv->fRegistered || !pDevExt->pTracerOps)
|
---|
| 737 | rc = VINF_SUCCESS;
|
---|
| 738 | else
|
---|
[40777] | 739 | rc = pDevExt->pTracerOps->pfnProviderDeregister(pDevExt->pTracerOps, &pProv->Core);
|
---|
[40756] | 740 | if (RT_SUCCESS(rc))
|
---|
[40704] | 741 | {
|
---|
[40756] | 742 | supdrvTracerFreeProvider(pProv);
|
---|
[40704] | 743 | return;
|
---|
| 744 | }
|
---|
| 745 |
|
---|
[41117] | 746 | pProv->fZombie = true;
|
---|
| 747 | pProv->pImage = NULL;
|
---|
| 748 | pProv->pSession = NULL;
|
---|
| 749 | pProv->pUmod = NULL;
|
---|
| 750 | pProv->Core.pDesc = NULL;
|
---|
| 751 | pProv->Core.pHdr = NULL;
|
---|
| 752 | pProv->Core.paProbeLocsRO = NULL;
|
---|
| 753 | pProv->Core.pvProbeLocsEn = NULL;
|
---|
| 754 | pProv->Core.pacProbeEnabled = NULL;
|
---|
| 755 | pProv->Core.paR0ProbeLocs = NULL;
|
---|
| 756 |
|
---|
[40756] | 757 | RTListAppend(&pDevExt->TracerProviderZombieList, &pProv->ListEntry);
|
---|
| 758 | LOG_TRACER(("Invalidated provider '%s' / %p and put it on the zombie list (rc=%Rrc)\n",
|
---|
| 759 | pProv->szName, pProv->Core.TracerData.DTrace.idProvider, rc));
|
---|
[40704] | 760 | }
|
---|
| 761 |
|
---|
| 762 |
|
---|
| 763 | /**
|
---|
[40756] | 764 | * Processes the zombie list.
|
---|
| 765 | *
|
---|
[40704] | 766 | * @param pDevExt The device extension.
|
---|
| 767 | */
|
---|
[40756] | 768 | static void supdrvTracerProcessZombies(PSUPDRVDEVEXT pDevExt)
|
---|
[40704] | 769 | {
|
---|
[40756] | 770 | PSUPDRVTPPROVIDER pProv, pProvNext;
|
---|
[40704] | 771 |
|
---|
[40756] | 772 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 773 | RTListForEachSafe(&pDevExt->TracerProviderZombieList, pProv, pProvNext, SUPDRVTPPROVIDER, ListEntry)
|
---|
[40704] | 774 | {
|
---|
[40777] | 775 | int rc = pDevExt->pTracerOps->pfnProviderDeregisterZombie(pDevExt->pTracerOps, &pProv->Core);
|
---|
[40756] | 776 | if (RT_SUCCESS(rc))
|
---|
[40704] | 777 | {
|
---|
| 778 | RTListNodeRemove(&pProv->ListEntry);
|
---|
[40756] | 779 | supdrvTracerFreeProvider(pProv);
|
---|
[40704] | 780 | }
|
---|
| 781 | }
|
---|
[40756] | 782 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40704] | 783 | }
|
---|
| 784 |
|
---|
| 785 |
|
---|
| 786 | /**
|
---|
[40756] | 787 | * Unregisters all providers, including zombies, waiting for busy providers to
|
---|
| 788 | * go idle and unregister smoothly.
|
---|
| 789 | *
|
---|
| 790 | * This may block.
|
---|
| 791 | *
|
---|
| 792 | * @param pDevExt The device extension.
|
---|
| 793 | */
|
---|
| 794 | static void supdrvTracerRemoveAllProviders(PSUPDRVDEVEXT pDevExt)
|
---|
| 795 | {
|
---|
| 796 | uint32_t i;
|
---|
| 797 | PSUPDRVTPPROVIDER pProv;
|
---|
| 798 | PSUPDRVTPPROVIDER pProvNext;
|
---|
| 799 |
|
---|
| 800 | /*
|
---|
| 801 | * Unregister all probes (there should only be one).
|
---|
| 802 | */
|
---|
| 803 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 804 | RTListForEachSafe(&pDevExt->TracerProviderList, pProv, pProvNext, SUPDRVTPPROVIDER, ListEntry)
|
---|
| 805 | {
|
---|
| 806 | supdrvTracerDeregisterVtgObj(pDevExt, pProv);
|
---|
| 807 | }
|
---|
| 808 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 809 |
|
---|
| 810 | /*
|
---|
[40819] | 811 | * Try unregister zombies now, sleep on busy ones and tracer opens.
|
---|
[40756] | 812 | */
|
---|
| 813 | for (i = 0; ; i++)
|
---|
| 814 | {
|
---|
| 815 | bool fEmpty;
|
---|
| 816 |
|
---|
| 817 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
[40819] | 818 |
|
---|
| 819 | /* Zombies */
|
---|
[40756] | 820 | RTListForEachSafe(&pDevExt->TracerProviderZombieList, pProv, pProvNext, SUPDRVTPPROVIDER, ListEntry)
|
---|
| 821 | {
|
---|
| 822 | int rc;
|
---|
| 823 | LOG_TRACER(("supdrvTracerRemoveAllProviders: Attemting to unregister '%s' / %p...\n",
|
---|
| 824 | pProv->szName, pProv->Core.TracerData.DTrace.idProvider));
|
---|
| 825 |
|
---|
| 826 | if (pDevExt->pTracerOps)
|
---|
[40777] | 827 | rc = pDevExt->pTracerOps->pfnProviderDeregisterZombie(pDevExt->pTracerOps, &pProv->Core);
|
---|
[40756] | 828 | else
|
---|
| 829 | rc = VINF_SUCCESS;
|
---|
| 830 | if (!rc)
|
---|
| 831 | {
|
---|
| 832 | RTListNodeRemove(&pProv->ListEntry);
|
---|
| 833 | supdrvTracerFreeProvider(pProv);
|
---|
| 834 | }
|
---|
| 835 | else if (!(i & 0xf))
|
---|
| 836 | SUPR0Printf("supdrvTracerRemoveAllProviders: Waiting on busy provider '%s' / %p (rc=%d)\n",
|
---|
| 837 | pProv->szName, pProv->Core.TracerData.DTrace.idProvider, rc);
|
---|
| 838 | else
|
---|
| 839 | LOG_TRACER(("supdrvTracerRemoveAllProviders: Failed to unregister provider '%s' / %p - rc=%d\n",
|
---|
| 840 | pProv->szName, pProv->Core.TracerData.DTrace.idProvider, rc));
|
---|
| 841 | }
|
---|
| 842 |
|
---|
| 843 | fEmpty = RTListIsEmpty(&pDevExt->TracerProviderZombieList);
|
---|
[40819] | 844 |
|
---|
| 845 | /* Tracer opens. */
|
---|
| 846 | if ( pDevExt->cTracerOpens
|
---|
| 847 | && pDevExt->pTracerOps)
|
---|
| 848 | {
|
---|
| 849 | fEmpty = false;
|
---|
| 850 | if (!(i & 0xf))
|
---|
| 851 | SUPR0Printf("supdrvTracerRemoveAllProviders: Waiting on %u opens\n", pDevExt->cTracerOpens);
|
---|
| 852 | else
|
---|
| 853 | LOG_TRACER(("supdrvTracerRemoveAllProviders: Waiting on %u opens\n", pDevExt->cTracerOpens));
|
---|
| 854 | }
|
---|
| 855 |
|
---|
[40756] | 856 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40819] | 857 |
|
---|
[40756] | 858 | if (fEmpty)
|
---|
| 859 | break;
|
---|
| 860 |
|
---|
| 861 | /* Delay...*/
|
---|
| 862 | RTThreadSleep(1000);
|
---|
| 863 | }
|
---|
| 864 | }
|
---|
| 865 |
|
---|
| 866 |
|
---|
| 867 | /**
|
---|
[40600] | 868 | * Registers the VTG tracepoint providers of a driver.
|
---|
[40602] | 869 | *
|
---|
| 870 | * @returns VBox status code.
|
---|
[58340] | 871 | * @param pDevExt The device instance data.
|
---|
[40602] | 872 | * @param pVtgHdr The VTG object header.
|
---|
| 873 | * @param pImage The image if applicable.
|
---|
| 874 | * @param pSession The session if applicable.
|
---|
[41117] | 875 | * @param pUmod The associated user tracepoint module if
|
---|
| 876 | * applicable.
|
---|
[40602] | 877 | * @param pszModName The module name.
|
---|
[40600] | 878 | */
|
---|
[41117] | 879 | static int supdrvTracerRegisterVtgObj(PSUPDRVDEVEXT pDevExt, PVTGOBJHDR pVtgHdr, PSUPDRVLDRIMAGE pImage,
|
---|
| 880 | PSUPDRVSESSION pSession, PSUPDRVTRACERUMOD pUmod, const char *pszModName)
|
---|
[40600] | 881 | {
|
---|
[40602] | 882 | int rc;
|
---|
[40819] | 883 | uintptr_t i;
|
---|
[40756] | 884 | PSUPDRVTPPROVIDER pProv;
|
---|
[41117] | 885 | size_t cchModName;
|
---|
[40602] | 886 |
|
---|
[40600] | 887 | /*
|
---|
| 888 | * Validate input.
|
---|
| 889 | */
|
---|
| 890 | AssertPtrReturn(pDevExt, VERR_INVALID_POINTER);
|
---|
| 891 | AssertPtrReturn(pVtgHdr, VERR_INVALID_POINTER);
|
---|
| 892 | AssertPtrNullReturn(pImage, VERR_INVALID_POINTER);
|
---|
| 893 | AssertPtrNullReturn(pSession, VERR_INVALID_POINTER);
|
---|
| 894 | AssertPtrReturn(pszModName, VERR_INVALID_POINTER);
|
---|
[41117] | 895 | cchModName = strlen(pszModName);
|
---|
[40600] | 896 |
|
---|
[40602] | 897 | if (pImage)
|
---|
[41117] | 898 | rc = supdrvVtgValidate(pVtgHdr, (uintptr_t)pVtgHdr,
|
---|
| 899 | (const uint8_t *)pImage->pvImage, pImage->cbImageBits,
|
---|
| 900 | false /*fUmod*/);
|
---|
[40602] | 901 | else
|
---|
[41117] | 902 | rc = supdrvVtgValidate(pVtgHdr, (uintptr_t)pVtgHdr, NULL, 0, pUmod != NULL);
|
---|
[40602] | 903 | if (RT_FAILURE(rc))
|
---|
| 904 | return rc;
|
---|
[40600] | 905 |
|
---|
[41117] | 906 | /*
|
---|
| 907 | * Check that there aren't any obvious duplicates.
|
---|
| 908 | * (Yes, this isn't race free, but it's good enough for now.)
|
---|
| 909 | */
|
---|
[40756] | 910 | rc = RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
[40704] | 911 | if (RT_FAILURE(rc))
|
---|
| 912 | return rc;
|
---|
[41133] | 913 | if (pImage || !pSession || pSession->R0Process == NIL_RTPROCESS)
|
---|
[40602] | 914 | {
|
---|
[41117] | 915 | RTListForEach(&pDevExt->TracerProviderList, pProv, SUPDRVTPPROVIDER, ListEntry)
|
---|
[40602] | 916 | {
|
---|
[41117] | 917 | if (pProv->Core.pHdr == pVtgHdr)
|
---|
| 918 | {
|
---|
| 919 | rc = VERR_SUPDRV_VTG_ALREADY_REGISTERED;
|
---|
| 920 | break;
|
---|
| 921 | }
|
---|
| 922 |
|
---|
| 923 | if ( pProv->pSession == pSession
|
---|
| 924 | && pProv->pImage == pImage)
|
---|
| 925 | {
|
---|
| 926 | rc = VERR_SUPDRV_VTG_ONLY_ONCE_PER_SESSION;
|
---|
| 927 | break;
|
---|
| 928 | }
|
---|
[40602] | 929 | }
|
---|
[41117] | 930 | }
|
---|
| 931 | else
|
---|
| 932 | {
|
---|
| 933 | RTListForEach(&pSession->TpProviders, pProv, SUPDRVTPPROVIDER, SessionListEntry)
|
---|
[40704] | 934 | {
|
---|
[41117] | 935 | if (pProv->Core.pHdr == pVtgHdr)
|
---|
| 936 | {
|
---|
| 937 | rc = VERR_SUPDRV_VTG_ALREADY_REGISTERED;
|
---|
| 938 | break;
|
---|
| 939 | }
|
---|
[40704] | 940 | }
|
---|
[40602] | 941 | }
|
---|
[40756] | 942 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40704] | 943 | if (RT_FAILURE(rc))
|
---|
| 944 | return rc;
|
---|
[40600] | 945 |
|
---|
| 946 | /*
|
---|
[40602] | 947 | * Register the providers.
|
---|
[40600] | 948 | */
|
---|
[40602] | 949 | i = pVtgHdr->cbProviders / sizeof(VTGDESCPROVIDER);
|
---|
| 950 | while (i-- > 0)
|
---|
| 951 | {
|
---|
[41117] | 952 | PVTGDESCPROVIDER pDesc = (PVTGDESCPROVIDER)((uintptr_t)pVtgHdr + pVtgHdr->offProviders) + i;
|
---|
[40704] | 953 | const char *pszName = supdrvVtgGetString(pVtgHdr, pDesc->offName);
|
---|
[41117] | 954 | size_t const cchName = strlen(pszName) + (pUmod ? 16 : 0);
|
---|
| 955 |
|
---|
| 956 | pProv = (PSUPDRVTPPROVIDER)RTMemAllocZ(RT_OFFSETOF(SUPDRVTPPROVIDER, szName[cchName + 1 + cchModName + 1]));
|
---|
[40602] | 957 | if (pProv)
|
---|
| 958 | {
|
---|
[41117] | 959 | pProv->Core.pszName = &pProv->szName[0];
|
---|
| 960 | pProv->Core.pszModName = &pProv->szName[cchName + 1];
|
---|
| 961 | pProv->Core.pDesc = pDesc;
|
---|
| 962 | pProv->Core.pHdr = pVtgHdr;
|
---|
| 963 | pProv->Core.paProbeLocsRO = (PCVTGPROBELOC )((uintptr_t)pVtgHdr + pVtgHdr->offProbeLocs);
|
---|
| 964 | if (!pUmod)
|
---|
| 965 | {
|
---|
| 966 | pProv->Core.pvProbeLocsEn = (void *)((uintptr_t)pVtgHdr + pVtgHdr->offProbeLocs);
|
---|
| 967 | pProv->Core.pacProbeEnabled = (uint32_t *)((uintptr_t)pVtgHdr + pVtgHdr->offProbeEnabled);
|
---|
| 968 | pProv->Core.paR0ProbeLocs = NULL;
|
---|
| 969 | pProv->Core.paR0Probes = NULL;
|
---|
| 970 | pProv->Core.cbProbeLocsEn = sizeof(VTGPROBELOC);
|
---|
| 971 | pProv->Core.cBits = ARCH_BITS;
|
---|
| 972 | pProv->Core.fUmod = false;
|
---|
| 973 | }
|
---|
| 974 | else
|
---|
| 975 | {
|
---|
| 976 | pProv->Core.pvProbeLocsEn = pUmod->pvProbeLocs;
|
---|
| 977 | pProv->Core.pacProbeEnabled = pUmod->pacProbeEnabled;
|
---|
| 978 | pProv->Core.paR0ProbeLocs = &pUmod->aProbeLocs[0];
|
---|
| 979 | pProv->Core.paR0Probes = (PSUPDRVPROBEINFO)&pUmod->aProbeLocs[pUmod->cProbeLocs];
|
---|
| 980 | pProv->Core.cbProbeLocsEn = pUmod->cbProbeLoc;
|
---|
| 981 | pProv->Core.cBits = pUmod->cBits;
|
---|
| 982 | pProv->Core.fUmod = true;
|
---|
| 983 | }
|
---|
| 984 | pProv->pImage = pImage;
|
---|
| 985 | pProv->pSession = pSession;
|
---|
| 986 | pProv->pUmod = pUmod;
|
---|
| 987 | pProv->fZombie = false;
|
---|
| 988 | pProv->fRegistered = true;
|
---|
[40600] | 989 |
|
---|
[41117] | 990 | if (!pUmod)
|
---|
| 991 | memcpy(pProv->szName, pszName, cchName + 1);
|
---|
| 992 | else
|
---|
| 993 | RTStrPrintf(pProv->szName, cchName + 1, "%s%u", pszName, (uint32_t)pSession->Process);
|
---|
| 994 | memcpy((void *)pProv->Core.pszModName, pszModName, cchModName + 1);
|
---|
| 995 |
|
---|
| 996 | /*
|
---|
| 997 | * Do the actual registration and list manipulations while holding
|
---|
| 998 | * down the lock.
|
---|
| 999 | */
|
---|
[40756] | 1000 | rc = RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 1001 | if (RT_SUCCESS(rc))
|
---|
[40602] | 1002 | {
|
---|
[40812] | 1003 | if ( pDevExt->pTracerOps
|
---|
| 1004 | && !pDevExt->fTracerUnloading)
|
---|
[40777] | 1005 | rc = pDevExt->pTracerOps->pfnProviderRegister(pDevExt->pTracerOps, &pProv->Core);
|
---|
[40756] | 1006 | else
|
---|
| 1007 | {
|
---|
| 1008 | pProv->fRegistered = false;
|
---|
| 1009 | rc = VINF_SUCCESS;
|
---|
| 1010 | }
|
---|
[40602] | 1011 | if (RT_SUCCESS(rc))
|
---|
| 1012 | {
|
---|
[40756] | 1013 | RTListAppend(&pDevExt->TracerProviderList, &pProv->ListEntry);
|
---|
[41117] | 1014 | if (pSession)
|
---|
| 1015 | {
|
---|
| 1016 | RTListAppend(&pSession->TpProviders, &pProv->SessionListEntry);
|
---|
| 1017 | pSession->cTpProviders++;
|
---|
| 1018 | }
|
---|
| 1019 | else
|
---|
| 1020 | RTListInit(&pProv->SessionListEntry);
|
---|
[40756] | 1021 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40813] | 1022 | LOG_TRACER(("Registered tracepoint provider '%s' in '%s' -> %p\n",
|
---|
[40756] | 1023 | pProv->szName, pszModName, pProv->Core.TracerData.DTrace.idProvider));
|
---|
[40602] | 1024 | }
|
---|
| 1025 | else
|
---|
[40756] | 1026 | {
|
---|
| 1027 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40851] | 1028 | LOG_TRACER(("Failed to register tracepoint provider '%s' in '%s' -> %Rrc\n",
|
---|
| 1029 | pProv->szName, pszModName, rc));
|
---|
[40756] | 1030 | }
|
---|
[40602] | 1031 | }
|
---|
| 1032 | }
|
---|
| 1033 | else
|
---|
| 1034 | rc = VERR_NO_MEMORY;
|
---|
| 1035 |
|
---|
[41117] | 1036 | /*
|
---|
| 1037 | * In case of failure, we have to undo any providers we already
|
---|
| 1038 | * managed to register.
|
---|
| 1039 | */
|
---|
[40602] | 1040 | if (RT_FAILURE(rc))
|
---|
| 1041 | {
|
---|
[40756] | 1042 | PSUPDRVTPPROVIDER pProvNext;
|
---|
[40602] | 1043 |
|
---|
[41117] | 1044 | if (pProv)
|
---|
| 1045 | supdrvTracerFreeProvider(pProv);
|
---|
| 1046 |
|
---|
[40756] | 1047 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
[41117] | 1048 | if (pImage)
|
---|
[40602] | 1049 | {
|
---|
[41117] | 1050 | RTListForEachReverseSafe(&pDevExt->TracerProviderList, pProv, pProvNext, SUPDRVTPPROVIDER, ListEntry)
|
---|
[40602] | 1051 | {
|
---|
[41117] | 1052 | if (pProv->Core.pHdr == pVtgHdr)
|
---|
| 1053 | supdrvTracerDeregisterVtgObj(pDevExt, pProv);
|
---|
[40602] | 1054 | }
|
---|
| 1055 | }
|
---|
[41117] | 1056 | else
|
---|
| 1057 | {
|
---|
| 1058 | RTListForEachSafe(&pSession->TpProviders, pProv, pProvNext, SUPDRVTPPROVIDER, SessionListEntry)
|
---|
| 1059 | {
|
---|
| 1060 | if (pProv->Core.pHdr == pVtgHdr)
|
---|
| 1061 | supdrvTracerDeregisterVtgObj(pDevExt, pProv);
|
---|
| 1062 | }
|
---|
| 1063 | }
|
---|
[40756] | 1064 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40602] | 1065 | return rc;
|
---|
| 1066 | }
|
---|
| 1067 | }
|
---|
| 1068 |
|
---|
| 1069 | return VINF_SUCCESS;
|
---|
[40600] | 1070 | }
|
---|
| 1071 |
|
---|
| 1072 |
|
---|
| 1073 | /**
|
---|
| 1074 | * Registers the VTG tracepoint providers of a driver.
|
---|
[40602] | 1075 | *
|
---|
| 1076 | * @returns VBox status code.
|
---|
| 1077 | * @param pSession The support driver session handle.
|
---|
[40600] | 1078 | * @param pVtgHdr The VTG header.
|
---|
| 1079 | * @param pszName The driver name.
|
---|
| 1080 | */
|
---|
[40763] | 1081 | SUPR0DECL(int) SUPR0TracerRegisterDrv(PSUPDRVSESSION pSession, PVTGOBJHDR pVtgHdr, const char *pszName)
|
---|
[40600] | 1082 | {
|
---|
[40675] | 1083 | int rc;
|
---|
| 1084 |
|
---|
[40607] | 1085 | AssertReturn(SUP_IS_SESSION_VALID(pSession), VERR_INVALID_PARAMETER);
|
---|
[40600] | 1086 | AssertPtrReturn(pszName, VERR_INVALID_POINTER);
|
---|
| 1087 | AssertPtrReturn(pVtgHdr, VERR_INVALID_POINTER);
|
---|
[40675] | 1088 | AssertReturn(pSession->R0Process == NIL_RTR0PROCESS, VERR_INVALID_PARAMETER);
|
---|
[40851] | 1089 | LOG_TRACER(("SUPR0TracerRegisterDrv: pSession=%p pVtgHdr=%p pszName=%s\n", pSession, pVtgHdr, pszName));
|
---|
[40600] | 1090 |
|
---|
[41117] | 1091 | rc = supdrvTracerRegisterVtgObj(pSession->pDevExt, pVtgHdr, NULL /*pImage*/, pSession, NULL /*pUmod*/, pszName);
|
---|
[40675] | 1092 |
|
---|
| 1093 | /*
|
---|
| 1094 | * Try unregister zombies while we have a chance.
|
---|
| 1095 | */
|
---|
[40756] | 1096 | supdrvTracerProcessZombies(pSession->pDevExt);
|
---|
[40675] | 1097 |
|
---|
| 1098 | return rc;
|
---|
[40600] | 1099 | }
|
---|
| 1100 |
|
---|
| 1101 |
|
---|
| 1102 | /**
|
---|
| 1103 | * Deregister the VTG tracepoint providers of a driver.
|
---|
[40602] | 1104 | *
|
---|
| 1105 | * @param pSession The support driver session handle.
|
---|
[40600] | 1106 | */
|
---|
[40763] | 1107 | SUPR0DECL(void) SUPR0TracerDeregisterDrv(PSUPDRVSESSION pSession)
|
---|
[40600] | 1108 | {
|
---|
[40756] | 1109 | PSUPDRVTPPROVIDER pProv, pProvNext;
|
---|
[40602] | 1110 | PSUPDRVDEVEXT pDevExt;
|
---|
| 1111 | AssertReturnVoid(SUP_IS_SESSION_VALID(pSession));
|
---|
[40675] | 1112 | AssertReturnVoid(pSession->R0Process == NIL_RTR0PROCESS);
|
---|
[40851] | 1113 | LOG_TRACER(("SUPR0TracerDeregisterDrv: pSession=%p\n", pSession));
|
---|
[40602] | 1114 |
|
---|
| 1115 | pDevExt = pSession->pDevExt;
|
---|
[40675] | 1116 |
|
---|
| 1117 | /*
|
---|
| 1118 | * Search for providers belonging to this driver session.
|
---|
| 1119 | */
|
---|
[40756] | 1120 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
[41117] | 1121 | RTListForEachSafe(&pSession->TpProviders, pProv, pProvNext, SUPDRVTPPROVIDER, SessionListEntry)
|
---|
[40602] | 1122 | {
|
---|
[41117] | 1123 | supdrvTracerDeregisterVtgObj(pDevExt, pProv);
|
---|
[40602] | 1124 | }
|
---|
[40756] | 1125 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40675] | 1126 |
|
---|
| 1127 | /*
|
---|
| 1128 | * Try unregister zombies while we have a chance.
|
---|
| 1129 | */
|
---|
[40756] | 1130 | supdrvTracerProcessZombies(pDevExt);
|
---|
[40600] | 1131 | }
|
---|
| 1132 |
|
---|
| 1133 |
|
---|
[40636] | 1134 | /**
|
---|
[40756] | 1135 | * Registers the VTG tracepoint providers of a module loaded by
|
---|
| 1136 | * the support driver.
|
---|
| 1137 | *
|
---|
[40636] | 1138 | * This should be called from the ModuleInit code.
|
---|
| 1139 | *
|
---|
| 1140 | * @returns VBox status code.
|
---|
| 1141 | * @param hMod The module handle.
|
---|
| 1142 | * @param pVtgHdr The VTG header.
|
---|
| 1143 | */
|
---|
[40763] | 1144 | SUPR0DECL(int) SUPR0TracerRegisterModule(void *hMod, PVTGOBJHDR pVtgHdr)
|
---|
[40636] | 1145 | {
|
---|
| 1146 | PSUPDRVLDRIMAGE pImage = (PSUPDRVLDRIMAGE)hMod;
|
---|
| 1147 | PSUPDRVDEVEXT pDevExt;
|
---|
[40675] | 1148 | int rc;
|
---|
[40600] | 1149 |
|
---|
[40812] | 1150 | LOG_TRACER(("SUPR0TracerRegisterModule: %p\n", pVtgHdr));
|
---|
| 1151 |
|
---|
[40756] | 1152 | /*
|
---|
[40636] | 1153 | * Validate input and context.
|
---|
| 1154 | */
|
---|
| 1155 | AssertPtrReturn(pImage, VERR_INVALID_HANDLE);
|
---|
| 1156 | AssertPtrReturn(pVtgHdr, VERR_INVALID_POINTER);
|
---|
| 1157 |
|
---|
[40756] | 1158 | AssertPtrReturn(pImage, VERR_INVALID_POINTER);
|
---|
[40636] | 1159 | pDevExt = pImage->pDevExt;
|
---|
| 1160 | AssertPtrReturn(pDevExt, VERR_INVALID_POINTER);
|
---|
| 1161 | AssertReturn(pDevExt->pLdrInitImage == pImage, VERR_WRONG_ORDER);
|
---|
| 1162 | AssertReturn(pDevExt->hLdrInitThread == RTThreadNativeSelf(), VERR_WRONG_ORDER);
|
---|
[41117] | 1163 | AssertReturn((uintptr_t)pVtgHdr - (uintptr_t)pImage->pvImage < pImage->cbImageBits, VERR_INVALID_PARAMETER);
|
---|
[40636] | 1164 |
|
---|
| 1165 | /*
|
---|
[41117] | 1166 | * Do the job.
|
---|
[40636] | 1167 | */
|
---|
[41117] | 1168 | rc = supdrvTracerRegisterVtgObj(pDevExt, pVtgHdr, pImage, NULL /*pSession*/, NULL /*pUmod*/, pImage->szName);
|
---|
[40812] | 1169 | LOG_TRACER(("SUPR0TracerRegisterModule: rc=%d\n", rc));
|
---|
[40675] | 1170 |
|
---|
| 1171 | /*
|
---|
| 1172 | * Try unregister zombies while we have a chance.
|
---|
| 1173 | */
|
---|
[40756] | 1174 | supdrvTracerProcessZombies(pDevExt);
|
---|
[40675] | 1175 |
|
---|
| 1176 | return rc;
|
---|
[40636] | 1177 | }
|
---|
| 1178 |
|
---|
| 1179 |
|
---|
[40600] | 1180 | /**
|
---|
[40763] | 1181 | * Registers the tracer implementation.
|
---|
[40636] | 1182 | *
|
---|
[40756] | 1183 | * This should be called from the ModuleInit code or from a ring-0 session.
|
---|
| 1184 | *
|
---|
| 1185 | * @returns VBox status code.
|
---|
| 1186 | * @param hMod The module handle.
|
---|
| 1187 | * @param pSession Ring-0 session handle.
|
---|
| 1188 | * @param pReg Pointer to the tracer registration structure.
|
---|
| 1189 | * @param ppHlp Where to return the tracer helper method table.
|
---|
[40636] | 1190 | */
|
---|
[40763] | 1191 | SUPR0DECL(int) SUPR0TracerRegisterImpl(void *hMod, PSUPDRVSESSION pSession, PCSUPDRVTRACERREG pReg, PCSUPDRVTRACERHLP *ppHlp)
|
---|
[40636] | 1192 | {
|
---|
[40812] | 1193 | PSUPDRVLDRIMAGE pImage = (PSUPDRVLDRIMAGE)hMod;
|
---|
| 1194 | PSUPDRVDEVEXT pDevExt;
|
---|
| 1195 | PSUPDRVTPPROVIDER pProv;
|
---|
| 1196 | int rc;
|
---|
[42011] | 1197 | int rc2;
|
---|
[40636] | 1198 |
|
---|
| 1199 | /*
|
---|
[40756] | 1200 | * Validate input and context.
|
---|
[40636] | 1201 | */
|
---|
[40756] | 1202 | AssertPtrReturn(ppHlp, VERR_INVALID_POINTER);
|
---|
| 1203 | *ppHlp = NULL;
|
---|
| 1204 | AssertPtrReturn(pReg, VERR_INVALID_HANDLE);
|
---|
| 1205 |
|
---|
| 1206 | if (pImage)
|
---|
[40636] | 1207 | {
|
---|
[40756] | 1208 | AssertPtrReturn(pImage, VERR_INVALID_POINTER);
|
---|
| 1209 | AssertReturn(pSession == NULL, VERR_INVALID_PARAMETER);
|
---|
| 1210 | pDevExt = pImage->pDevExt;
|
---|
| 1211 | AssertPtrReturn(pDevExt, VERR_INVALID_POINTER);
|
---|
| 1212 | AssertReturn(pDevExt->pLdrInitImage == pImage, VERR_WRONG_ORDER);
|
---|
| 1213 | AssertReturn(pDevExt->hLdrInitThread == RTThreadNativeSelf(), VERR_WRONG_ORDER);
|
---|
[40636] | 1214 | }
|
---|
[40756] | 1215 | else
|
---|
| 1216 | {
|
---|
| 1217 | AssertReturn(SUP_IS_SESSION_VALID(pSession), VERR_INVALID_PARAMETER);
|
---|
| 1218 | AssertReturn(pSession->R0Process == NIL_RTR0PROCESS, VERR_INVALID_PARAMETER);
|
---|
| 1219 | pDevExt = pSession->pDevExt;
|
---|
| 1220 | AssertPtrReturn(pDevExt, VERR_INVALID_POINTER);
|
---|
| 1221 | }
|
---|
[40675] | 1222 |
|
---|
[40812] | 1223 | AssertReturn(pReg->u32Magic == SUPDRVTRACERREG_MAGIC, VERR_INVALID_MAGIC);
|
---|
| 1224 | AssertReturn(pReg->u32Version == SUPDRVTRACERREG_VERSION, VERR_VERSION_MISMATCH);
|
---|
| 1225 | AssertReturn(pReg->uEndMagic == SUPDRVTRACERREG_MAGIC, VERR_VERSION_MISMATCH);
|
---|
[40777] | 1226 | AssertPtrReturn(pReg->pfnProbeFireKernel, VERR_INVALID_POINTER);
|
---|
| 1227 | AssertPtrReturn(pReg->pfnProbeFireUser, VERR_INVALID_POINTER);
|
---|
| 1228 | AssertPtrReturn(pReg->pfnTracerOpen, VERR_INVALID_POINTER);
|
---|
| 1229 | AssertPtrReturn(pReg->pfnTracerIoCtl, VERR_INVALID_POINTER);
|
---|
| 1230 | AssertPtrReturn(pReg->pfnTracerClose, VERR_INVALID_POINTER);
|
---|
| 1231 | AssertPtrReturn(pReg->pfnProviderRegister, VERR_INVALID_POINTER);
|
---|
| 1232 | AssertPtrReturn(pReg->pfnProviderDeregister, VERR_INVALID_POINTER);
|
---|
| 1233 | AssertPtrReturn(pReg->pfnProviderDeregisterZombie, VERR_INVALID_POINTER);
|
---|
[40636] | 1234 |
|
---|
[40518] | 1235 | /*
|
---|
[40756] | 1236 | * Do the job.
|
---|
[40518] | 1237 | */
|
---|
[40756] | 1238 | rc = RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
[40602] | 1239 | if (RT_SUCCESS(rc))
|
---|
| 1240 | {
|
---|
[40756] | 1241 | if (!pDevExt->pTracerOps)
|
---|
| 1242 | {
|
---|
[40812] | 1243 | LOG_TRACER(("SUPR0TracerRegisterImpl: pReg=%p\n", pReg));
|
---|
[40756] | 1244 | pDevExt->pTracerOps = pReg;
|
---|
| 1245 | pDevExt->pTracerSession = pSession;
|
---|
| 1246 | pDevExt->pTracerImage = pImage;
|
---|
| 1247 |
|
---|
[40831] | 1248 | g_pfnSupdrvProbeFireKernel = (PFNRT)pDevExt->pTracerOps->pfnProbeFireKernel;
|
---|
| 1249 |
|
---|
[40756] | 1250 | *ppHlp = &pDevExt->TracerHlp;
|
---|
| 1251 | rc = VINF_SUCCESS;
|
---|
[40812] | 1252 |
|
---|
| 1253 | /*
|
---|
| 1254 | * Iterate the already loaded modules and register their providers.
|
---|
| 1255 | */
|
---|
| 1256 | RTListForEach(&pDevExt->TracerProviderList, pProv, SUPDRVTPPROVIDER, ListEntry)
|
---|
| 1257 | {
|
---|
| 1258 | Assert(!pProv->fRegistered);
|
---|
| 1259 | pProv->fRegistered = true;
|
---|
[42011] | 1260 | rc2 = pDevExt->pTracerOps->pfnProviderRegister(pDevExt->pTracerOps, &pProv->Core);
|
---|
[40812] | 1261 | if (RT_FAILURE(rc2))
|
---|
| 1262 | {
|
---|
| 1263 | pProv->fRegistered = false;
|
---|
| 1264 | SUPR0Printf("SUPR0TracerRegisterImpl: Failed to register provider %s::%s - rc=%d\n",
|
---|
| 1265 | pProv->Core.pszModName, pProv->szName, rc2);
|
---|
| 1266 | }
|
---|
| 1267 | }
|
---|
[40756] | 1268 | }
|
---|
| 1269 | else
|
---|
| 1270 | rc = VERR_SUPDRV_TRACER_ALREADY_REGISTERED;
|
---|
| 1271 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40602] | 1272 | }
|
---|
[40756] | 1273 |
|
---|
[40602] | 1274 | return rc;
|
---|
[40756] | 1275 |
|
---|
[40518] | 1276 | }
|
---|
| 1277 |
|
---|
| 1278 |
|
---|
| 1279 | /**
|
---|
[40777] | 1280 | * Common tracer implementation deregistration code.
|
---|
[40600] | 1281 | *
|
---|
[40777] | 1282 | * The caller sets fTracerUnloading prior to calling this function.
|
---|
| 1283 | *
|
---|
| 1284 | * @param pDevExt The device extension structure.
|
---|
| 1285 | */
|
---|
| 1286 | static void supdrvTracerCommonDeregisterImpl(PSUPDRVDEVEXT pDevExt)
|
---|
| 1287 | {
|
---|
[40812] | 1288 | uint32_t i;
|
---|
| 1289 | PSUPDRVTPPROVIDER pProv;
|
---|
| 1290 | PSUPDRVTPPROVIDER pProvNext;
|
---|
[40777] | 1291 |
|
---|
| 1292 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
[40812] | 1293 |
|
---|
| 1294 | /*
|
---|
[40831] | 1295 | * Reinstall the stub probe-fire function.
|
---|
| 1296 | */
|
---|
| 1297 | g_pfnSupdrvProbeFireKernel = supdrvTracerProbeFireStub;
|
---|
| 1298 |
|
---|
| 1299 | /*
|
---|
[40812] | 1300 | * Disassociate the tracer implementation from all providers.
|
---|
| 1301 | * We will have to wait on busy providers.
|
---|
| 1302 | */
|
---|
| 1303 | for (i = 0; ; i++)
|
---|
| 1304 | {
|
---|
| 1305 | uint32_t cZombies = 0;
|
---|
| 1306 |
|
---|
| 1307 | /* Live providers. */
|
---|
| 1308 | RTListForEachSafe(&pDevExt->TracerProviderList, pProv, pProvNext, SUPDRVTPPROVIDER, ListEntry)
|
---|
| 1309 | {
|
---|
| 1310 | int rc;
|
---|
[40819] | 1311 | LOG_TRACER(("supdrvTracerCommonDeregisterImpl: Attemting to unregister '%s' / %p...\n",
|
---|
[40812] | 1312 | pProv->szName, pProv->Core.TracerData.DTrace.idProvider));
|
---|
| 1313 |
|
---|
| 1314 | if (!pProv->fRegistered)
|
---|
| 1315 | continue;
|
---|
| 1316 | if (!pProv->fZombie)
|
---|
| 1317 | {
|
---|
| 1318 | rc = pDevExt->pTracerOps->pfnProviderDeregister(pDevExt->pTracerOps, &pProv->Core);
|
---|
| 1319 | if (RT_FAILURE(rc))
|
---|
| 1320 | pProv->fZombie = true;
|
---|
| 1321 | }
|
---|
| 1322 | else
|
---|
| 1323 | rc = pDevExt->pTracerOps->pfnProviderDeregisterZombie(pDevExt->pTracerOps, &pProv->Core);
|
---|
| 1324 | if (RT_SUCCESS(rc))
|
---|
| 1325 | pProv->fZombie = pProv->fRegistered = false;
|
---|
| 1326 | else
|
---|
| 1327 | {
|
---|
| 1328 | cZombies++;
|
---|
| 1329 | if (!(i & 0xf))
|
---|
| 1330 | SUPR0Printf("supdrvTracerCommonDeregisterImpl: Waiting on busy provider '%s' / %p (rc=%d)\n",
|
---|
| 1331 | pProv->szName, pProv->Core.TracerData.DTrace.idProvider, rc);
|
---|
| 1332 | else
|
---|
| 1333 | LOG_TRACER(("supdrvTracerCommonDeregisterImpl: Failed to unregister provider '%s' / %p - rc=%d\n",
|
---|
| 1334 | pProv->szName, pProv->Core.TracerData.DTrace.idProvider, rc));
|
---|
| 1335 | }
|
---|
| 1336 | }
|
---|
| 1337 |
|
---|
| 1338 | /* Zombies providers. */
|
---|
| 1339 | RTListForEachSafe(&pDevExt->TracerProviderZombieList, pProv, pProvNext, SUPDRVTPPROVIDER, ListEntry)
|
---|
| 1340 | {
|
---|
| 1341 | int rc;
|
---|
[40819] | 1342 | LOG_TRACER(("supdrvTracerCommonDeregisterImpl: Attemting to unregister '%s' / %p (zombie)...\n",
|
---|
[40812] | 1343 | pProv->szName, pProv->Core.TracerData.DTrace.idProvider));
|
---|
| 1344 |
|
---|
| 1345 | rc = pDevExt->pTracerOps->pfnProviderDeregisterZombie(pDevExt->pTracerOps, &pProv->Core);
|
---|
| 1346 | if (RT_SUCCESS(rc))
|
---|
| 1347 | {
|
---|
| 1348 | RTListNodeRemove(&pProv->ListEntry);
|
---|
| 1349 | supdrvTracerFreeProvider(pProv);
|
---|
| 1350 | }
|
---|
| 1351 | else
|
---|
| 1352 | {
|
---|
| 1353 | cZombies++;
|
---|
| 1354 | if (!(i & 0xf))
|
---|
[40819] | 1355 | SUPR0Printf("supdrvTracerCommonDeregisterImpl: Waiting on busy provider '%s' / %p (rc=%d)\n",
|
---|
[40812] | 1356 | pProv->szName, pProv->Core.TracerData.DTrace.idProvider, rc);
|
---|
| 1357 | else
|
---|
[40819] | 1358 | LOG_TRACER(("supdrvTracerCommonDeregisterImpl: Failed to unregister provider '%s' / %p - rc=%d\n",
|
---|
[40812] | 1359 | pProv->szName, pProv->Core.TracerData.DTrace.idProvider, rc));
|
---|
| 1360 | }
|
---|
| 1361 | }
|
---|
| 1362 |
|
---|
[40819] | 1363 | /* Tracer opens. */
|
---|
| 1364 | if (pDevExt->cTracerOpens)
|
---|
| 1365 | {
|
---|
| 1366 | cZombies++;
|
---|
| 1367 | if (!(i & 0xf))
|
---|
| 1368 | SUPR0Printf("supdrvTracerCommonDeregisterImpl: Waiting on %u opens\n", pDevExt->cTracerOpens);
|
---|
| 1369 | else
|
---|
| 1370 | LOG_TRACER(("supdrvTracerCommonDeregisterImpl: Waiting on %u opens\n", pDevExt->cTracerOpens));
|
---|
| 1371 | }
|
---|
| 1372 |
|
---|
[41117] | 1373 | /* Tracer calls. */
|
---|
| 1374 | if (pDevExt->cTracerCallers)
|
---|
| 1375 | {
|
---|
| 1376 | cZombies++;
|
---|
| 1377 | if (!(i & 0xf))
|
---|
| 1378 | SUPR0Printf("supdrvTracerCommonDeregisterImpl: Waiting on %u callers\n", pDevExt->cTracerCallers);
|
---|
| 1379 | else
|
---|
| 1380 | LOG_TRACER(("supdrvTracerCommonDeregisterImpl: Waiting on %u callers\n", pDevExt->cTracerCallers));
|
---|
| 1381 | }
|
---|
| 1382 |
|
---|
[40819] | 1383 | /* Done? */
|
---|
[40812] | 1384 | if (cZombies == 0)
|
---|
| 1385 | break;
|
---|
| 1386 |
|
---|
| 1387 | /* Delay...*/
|
---|
| 1388 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 1389 | RTThreadSleep(1000);
|
---|
| 1390 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 1391 | }
|
---|
| 1392 |
|
---|
| 1393 | /*
|
---|
| 1394 | * Deregister the tracer implementation.
|
---|
| 1395 | */
|
---|
[40777] | 1396 | pDevExt->pTracerImage = NULL;
|
---|
| 1397 | pDevExt->pTracerSession = NULL;
|
---|
| 1398 | pDevExt->pTracerOps = NULL;
|
---|
| 1399 | pDevExt->fTracerUnloading = false;
|
---|
[40812] | 1400 |
|
---|
[40777] | 1401 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 1402 | }
|
---|
| 1403 |
|
---|
| 1404 |
|
---|
| 1405 | /**
|
---|
| 1406 | * Deregister a tracer implementation.
|
---|
| 1407 | *
|
---|
| 1408 | * This should be called from the ModuleTerm code or from a ring-0 session.
|
---|
| 1409 | *
|
---|
[40518] | 1410 | * @returns VBox status code.
|
---|
[40777] | 1411 | * @param hMod The module handle.
|
---|
[40756] | 1412 | * @param pSession Ring-0 session handle.
|
---|
[40518] | 1413 | */
|
---|
[40777] | 1414 | SUPR0DECL(int) SUPR0TracerDeregisterImpl(void *hMod, PSUPDRVSESSION pSession)
|
---|
[40518] | 1415 | {
|
---|
[40777] | 1416 | PSUPDRVLDRIMAGE pImage = (PSUPDRVLDRIMAGE)hMod;
|
---|
[40756] | 1417 | PSUPDRVDEVEXT pDevExt;
|
---|
| 1418 | int rc;
|
---|
[40602] | 1419 |
|
---|
[40518] | 1420 | /*
|
---|
[40756] | 1421 | * Validate input and context.
|
---|
[40518] | 1422 | */
|
---|
[40777] | 1423 | if (pImage)
|
---|
| 1424 | {
|
---|
| 1425 | AssertPtrReturn(pImage, VERR_INVALID_POINTER);
|
---|
| 1426 | AssertReturn(pSession == NULL, VERR_INVALID_PARAMETER);
|
---|
| 1427 | pDevExt = pImage->pDevExt;
|
---|
| 1428 | }
|
---|
| 1429 | else
|
---|
| 1430 | {
|
---|
| 1431 | AssertReturn(SUP_IS_SESSION_VALID(pSession), VERR_INVALID_PARAMETER);
|
---|
| 1432 | AssertReturn(pSession->R0Process == NIL_RTR0PROCESS, VERR_INVALID_PARAMETER);
|
---|
| 1433 | pDevExt = pSession->pDevExt;
|
---|
| 1434 | }
|
---|
[40756] | 1435 | AssertPtrReturn(pDevExt, VERR_INVALID_POINTER);
|
---|
[40518] | 1436 |
|
---|
[40675] | 1437 | /*
|
---|
[40756] | 1438 | * Do the job.
|
---|
[40675] | 1439 | */
|
---|
[40756] | 1440 | rc = RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 1441 | if (RT_SUCCESS(rc))
|
---|
[40675] | 1442 | {
|
---|
[40777] | 1443 | if ( pImage
|
---|
| 1444 | ? pDevExt->pTracerImage == pImage
|
---|
| 1445 | : pDevExt->pTracerSession == pSession)
|
---|
[40675] | 1446 | {
|
---|
[40812] | 1447 | LOG_TRACER(("SUPR0TracerDeregisterImpl: Unloading ...\n"));
|
---|
[40756] | 1448 | pDevExt->fTracerUnloading = true;
|
---|
| 1449 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40777] | 1450 | supdrvTracerCommonDeregisterImpl(pDevExt);
|
---|
[40812] | 1451 | LOG_TRACER(("SUPR0TracerDeregisterImpl: ... done.\n"));
|
---|
[40756] | 1452 | }
|
---|
| 1453 | else
|
---|
[40777] | 1454 | {
|
---|
[40756] | 1455 | rc = VERR_SUPDRV_TRACER_NOT_REGISTERED;
|
---|
[40777] | 1456 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 1457 | }
|
---|
[40602] | 1458 | }
|
---|
[40675] | 1459 |
|
---|
[40756] | 1460 | return rc;
|
---|
[40518] | 1461 | }
|
---|
| 1462 |
|
---|
| 1463 |
|
---|
[40777] | 1464 | /*
|
---|
| 1465 | * The probe function is a bit more fun since we need tail jump optimizating.
|
---|
| 1466 | *
|
---|
| 1467 | * Since we cannot ship yasm sources for linux and freebsd, owing to the cursed
|
---|
| 1468 | * rebuilding of the kernel module from scratch at install time, we have to
|
---|
| 1469 | * deploy some ugly gcc inline assembly here.
|
---|
| 1470 | */
|
---|
| 1471 | #if defined(__GNUC__) && (defined(RT_OS_FREEBSD) || defined(RT_OS_LINUX))
|
---|
[40798] | 1472 | __asm__("\
|
---|
[40784] | 1473 | .section .text \n\
|
---|
[40783] | 1474 | \n\
|
---|
[40784] | 1475 | .p2align 2,,3 \n\
|
---|
| 1476 | .global SUPR0TracerFireProbe \n\
|
---|
[40783] | 1477 | SUPR0TracerFireProbe: \n\
|
---|
[40777] | 1478 | ");
|
---|
| 1479 | # if defined(RT_ARCH_AMD64)
|
---|
[40798] | 1480 | __asm__(" \
|
---|
[48952] | 1481 | movq g_pfnSupdrvProbeFireKernel(%rip), %rax \n\
|
---|
| 1482 | jmp *%rax \n\
|
---|
[40784] | 1483 | ");
|
---|
[40777] | 1484 | # elif defined(RT_ARCH_X86)
|
---|
[40798] | 1485 | __asm__("\
|
---|
[48952] | 1486 | movl g_pfnSupdrvProbeFireKernel, %eax \n\
|
---|
| 1487 | jmp *%eax \n\
|
---|
[40777] | 1488 | ");
|
---|
| 1489 | # else
|
---|
| 1490 | # error "Which arch is this?"
|
---|
[40867] | 1491 | # endif
|
---|
[40798] | 1492 | __asm__("\
|
---|
[40783] | 1493 | \n\
|
---|
[40784] | 1494 | .type supdrvTracerProbeFireStub,@function \n\
|
---|
| 1495 | .global supdrvTracerProbeFireStub \n\
|
---|
[40783] | 1496 | supdrvTracerProbeFireStub: \n\
|
---|
[40784] | 1497 | ret \n\
|
---|
[40783] | 1498 | \n\
|
---|
[40784] | 1499 | .previous \n\
|
---|
[40777] | 1500 | ");
|
---|
[40819] | 1501 | # if 0 /* Slickedit on windows highlighting fix */
|
---|
| 1502 | )
|
---|
| 1503 | # endif
|
---|
[40777] | 1504 | #endif
|
---|
| 1505 |
|
---|
| 1506 |
|
---|
[40518] | 1507 | /**
|
---|
[40756] | 1508 | * Module unloading hook, called after execution in the module have ceased.
|
---|
| 1509 | *
|
---|
| 1510 | * @param pDevExt The device extension structure.
|
---|
| 1511 | * @param pImage The image being unloaded.
|
---|
[40518] | 1512 | */
|
---|
[40756] | 1513 | void VBOXCALL supdrvTracerModuleUnloading(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage)
|
---|
[40518] | 1514 | {
|
---|
[40756] | 1515 | PSUPDRVTPPROVIDER pProv, pProvNext;
|
---|
| 1516 | AssertPtrReturnVoid(pImage); /* paranoia */
|
---|
[40602] | 1517 |
|
---|
[40756] | 1518 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
[40602] | 1519 |
|
---|
[40756] | 1520 | /*
|
---|
| 1521 | * If it is the tracer image, we have to unload all the providers.
|
---|
| 1522 | */
|
---|
| 1523 | if (pDevExt->pTracerImage == pImage)
|
---|
| 1524 | {
|
---|
[40812] | 1525 | LOG_TRACER(("supdrvTracerModuleUnloading: Unloading tracer ...\n"));
|
---|
[40756] | 1526 | pDevExt->fTracerUnloading = true;
|
---|
| 1527 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40777] | 1528 | supdrvTracerCommonDeregisterImpl(pDevExt);
|
---|
[40812] | 1529 | LOG_TRACER(("supdrvTracerModuleUnloading: ... done.\n"));
|
---|
[40756] | 1530 | }
|
---|
| 1531 | else
|
---|
[40675] | 1532 | {
|
---|
[40756] | 1533 | /*
|
---|
| 1534 | * Unregister all providers belonging to this image.
|
---|
| 1535 | */
|
---|
| 1536 | RTListForEachSafe(&pDevExt->TracerProviderList, pProv, pProvNext, SUPDRVTPPROVIDER, ListEntry)
|
---|
[40675] | 1537 | {
|
---|
[40756] | 1538 | if (pProv->pImage == pImage)
|
---|
| 1539 | supdrvTracerDeregisterVtgObj(pDevExt, pProv);
|
---|
[40675] | 1540 | }
|
---|
[40602] | 1541 |
|
---|
[40756] | 1542 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40518] | 1543 |
|
---|
[40756] | 1544 | /*
|
---|
| 1545 | * Try unregister zombies while we have a chance.
|
---|
| 1546 | */
|
---|
| 1547 | supdrvTracerProcessZombies(pDevExt);
|
---|
[40602] | 1548 | }
|
---|
[40518] | 1549 | }
|
---|
| 1550 |
|
---|
| 1551 |
|
---|
| 1552 | /**
|
---|
[40759] | 1553 | * Called when a session is being cleaned up.
|
---|
| 1554 | *
|
---|
| 1555 | * @param pDevExt The device extension structure.
|
---|
| 1556 | * @param pSession The session that is being torn down.
|
---|
| 1557 | */
|
---|
| 1558 | void VBOXCALL supdrvTracerCleanupSession(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession)
|
---|
| 1559 | {
|
---|
| 1560 | /*
|
---|
[41117] | 1561 | * Deregister all providers.
|
---|
[40759] | 1562 | */
|
---|
[41117] | 1563 | SUPDRVTPPROVIDER *pProvNext;
|
---|
| 1564 | SUPDRVTPPROVIDER *pProv;
|
---|
| 1565 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 1566 | RTListForEachSafe(&pSession->TpProviders, pProv, pProvNext, SUPDRVTPPROVIDER, SessionListEntry)
|
---|
| 1567 | {
|
---|
| 1568 | supdrvTracerDeregisterVtgObj(pDevExt, pProv);
|
---|
| 1569 | }
|
---|
| 1570 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 1571 |
|
---|
| 1572 | /*
|
---|
| 1573 | * Clean up instance data the trace may have associated with the session.
|
---|
| 1574 | */
|
---|
| 1575 | if (pSession->uTracerData)
|
---|
| 1576 | supdrvIOCtl_TracerClose(pDevExt, pSession);
|
---|
| 1577 |
|
---|
| 1578 | /*
|
---|
| 1579 | * Deregister any tracer implementation.
|
---|
| 1580 | */
|
---|
[40759] | 1581 | if (pSession->R0Process == NIL_RTR0PROCESS)
|
---|
[41117] | 1582 | (void)SUPR0TracerDeregisterImpl(NULL, pSession);
|
---|
| 1583 |
|
---|
| 1584 | if (pSession->R0Process != NIL_RTR0PROCESS)
|
---|
[40759] | 1585 | {
|
---|
[41117] | 1586 | /*
|
---|
| 1587 | * Free any lingering user modules. We don't bother holding the lock
|
---|
| 1588 | * here as there shouldn't be anyone messing with the session at this
|
---|
| 1589 | * point.
|
---|
| 1590 | */
|
---|
| 1591 | PSUPDRVTRACERUMOD pUmodNext;
|
---|
| 1592 | PSUPDRVTRACERUMOD pUmod;
|
---|
| 1593 | RTListForEachSafe(&pSession->TpUmods, pUmod, pUmodNext, SUPDRVTRACERUMOD, ListEntry)
|
---|
| 1594 | {
|
---|
| 1595 | RTR0MemObjFree(pUmod->hMemObjMap, false /*fFreeMappings*/);
|
---|
| 1596 | RTR0MemObjFree(pUmod->hMemObjLock, false /*fFreeMappings*/);
|
---|
| 1597 | supdrvVtgReleaseObjectCopy(pDevExt, pUmod->pVtgCopy);
|
---|
| 1598 | RTMemFree(pUmod);
|
---|
| 1599 | }
|
---|
| 1600 | }
|
---|
| 1601 | }
|
---|
[40759] | 1602 |
|
---|
[41117] | 1603 |
|
---|
| 1604 | static void supdrvVtgReleaseObjectCopy(PSUPDRVDEVEXT pDevExt, PSUPDRVVTGCOPY pThis)
|
---|
| 1605 | {
|
---|
| 1606 | uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
|
---|
| 1607 | if (!cRefs)
|
---|
| 1608 | {
|
---|
[40759] | 1609 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
[41117] | 1610 | pThis->u32Magic = ~SUDPRVVTGCOPY_MAGIC;
|
---|
| 1611 | RTListNodeRemove(&pThis->ListEntry);
|
---|
| 1612 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 1613 |
|
---|
| 1614 | RTMemFree(pThis);
|
---|
| 1615 | }
|
---|
| 1616 | }
|
---|
| 1617 |
|
---|
| 1618 |
|
---|
| 1619 | /**
|
---|
| 1620 | * Finds a matching VTG object copy, caller owns the lock already.
|
---|
| 1621 | *
|
---|
| 1622 | * @returns Copy with reference. NULL if not found.
|
---|
| 1623 | * @param pHashList The hash list to search.
|
---|
| 1624 | * @param pHdr The VTG header (valid).
|
---|
| 1625 | * @param cbStrTab The string table size.
|
---|
| 1626 | * @param fFlags The user module flags.
|
---|
| 1627 | */
|
---|
| 1628 | static PSUPDRVVTGCOPY supdrvVtgFindObjectCopyLocked(PRTLISTANCHOR pHashList, PCVTGOBJHDR pHdr, uint32_t cbStrTab, uint32_t fFlags)
|
---|
| 1629 | {
|
---|
| 1630 | PSUPDRVVTGCOPY pCur;
|
---|
| 1631 |
|
---|
| 1632 | fFlags &= SUP_TRACER_UMOD_FLAGS_TYPE_MASK;
|
---|
| 1633 | RTListForEach(pHashList, pCur, SUPDRVVTGCOPY, ListEntry)
|
---|
| 1634 | {
|
---|
| 1635 | #define HDR_EQUALS(member) pCur->Hdr.member == pHdr->member
|
---|
| 1636 | if ( HDR_EQUALS(Uuid.au32[0])
|
---|
| 1637 | && HDR_EQUALS(Uuid.au32[1])
|
---|
| 1638 | && HDR_EQUALS(Uuid.au32[2])
|
---|
| 1639 | && HDR_EQUALS(Uuid.au32[3])
|
---|
| 1640 | && HDR_EQUALS(cbObj)
|
---|
| 1641 | && HDR_EQUALS(cBits)
|
---|
| 1642 | && pCur->cbStrTab == cbStrTab
|
---|
| 1643 | && pCur->fFlags == fFlags
|
---|
| 1644 | )
|
---|
[40759] | 1645 | {
|
---|
[41117] | 1646 | if (RT_LIKELY( HDR_EQUALS(offStrTab)
|
---|
| 1647 | && HDR_EQUALS(cbStrTab)
|
---|
| 1648 | && HDR_EQUALS(offArgLists)
|
---|
| 1649 | && HDR_EQUALS(cbArgLists)
|
---|
| 1650 | && HDR_EQUALS(offProbes)
|
---|
| 1651 | && HDR_EQUALS(cbProbes)
|
---|
| 1652 | && HDR_EQUALS(offProviders)
|
---|
| 1653 | && HDR_EQUALS(cbProviders)
|
---|
| 1654 | && HDR_EQUALS(offProbeEnabled)
|
---|
| 1655 | && HDR_EQUALS(cbProbeEnabled)
|
---|
| 1656 | && HDR_EQUALS(offProbeLocs)
|
---|
| 1657 | && HDR_EQUALS(cbProbeLocs)
|
---|
| 1658 | )
|
---|
| 1659 | )
|
---|
[40759] | 1660 | {
|
---|
[41117] | 1661 | Assert(pCur->cRefs > 0);
|
---|
| 1662 | Assert(pCur->cRefs < _1M);
|
---|
| 1663 | pCur->cRefs++;
|
---|
| 1664 | return pCur;
|
---|
[40759] | 1665 | }
|
---|
| 1666 | }
|
---|
[41117] | 1667 | #undef HDR_EQUALS
|
---|
| 1668 | }
|
---|
[40759] | 1669 |
|
---|
[41117] | 1670 | return NULL;
|
---|
| 1671 | }
|
---|
| 1672 |
|
---|
| 1673 |
|
---|
| 1674 | /**
|
---|
| 1675 | * Finds a matching VTG object copy.
|
---|
| 1676 | *
|
---|
| 1677 | * @returns Copy with reference. NULL if not found.
|
---|
| 1678 | * @param pDevExt The device extension.
|
---|
| 1679 | * @param pHdr The VTG header (valid).
|
---|
| 1680 | * @param cbStrTab The string table size.
|
---|
| 1681 | * @param fFlags The user module flags.
|
---|
| 1682 | */
|
---|
| 1683 | static PSUPDRVVTGCOPY supdrvVtgFindObjectCopy(PSUPDRVDEVEXT pDevExt, PCVTGOBJHDR pHdr, uint32_t cbStrTab, uint32_t fFlags)
|
---|
| 1684 | {
|
---|
| 1685 | PRTLISTANCHOR pHashList = &pDevExt->aTrackerUmodHash[pHdr->Uuid.au8[3] % RT_ELEMENTS(pDevExt->aTrackerUmodHash)];
|
---|
| 1686 | PSUPDRVVTGCOPY pRet;
|
---|
| 1687 |
|
---|
| 1688 | int rc = RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 1689 | AssertRCReturn(rc, NULL);
|
---|
| 1690 |
|
---|
| 1691 | pRet = supdrvVtgFindObjectCopyLocked(pHashList, pHdr, cbStrTab, fFlags);
|
---|
| 1692 |
|
---|
| 1693 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 1694 | return pRet;
|
---|
| 1695 | }
|
---|
| 1696 |
|
---|
| 1697 |
|
---|
| 1698 | /**
|
---|
| 1699 | * Makes a shared copy of the VTG object.
|
---|
| 1700 | *
|
---|
| 1701 | * @returns VBox status code.
|
---|
| 1702 | * @param pDevExt The device extension.
|
---|
| 1703 | * @param pVtgHdr The VTG header (valid).
|
---|
| 1704 | * @param R3PtrVtgHdr The ring-3 VTG header address.
|
---|
| 1705 | * @param uVtgHdrAddr The address of the VTG header in the context
|
---|
| 1706 | * where it is actually used.
|
---|
| 1707 | * @param R3PtrStrTab The ring-3 address of the probe location string
|
---|
| 1708 | * table. The probe location array have offsets
|
---|
| 1709 | * into this instead of funciton name pointers.
|
---|
| 1710 | * @param cbStrTab The size of the probe location string table.
|
---|
| 1711 | * @param fFlags The user module flags.
|
---|
| 1712 | * @param pUmod The structure we've allocated to track the
|
---|
| 1713 | * module. This have a valid kernel mapping of the
|
---|
| 1714 | * probe location array. Upon successful return,
|
---|
| 1715 | * the pVtgCopy member will hold the address of our
|
---|
| 1716 | * copy (with a referenced of course).
|
---|
| 1717 | */
|
---|
| 1718 | static int supdrvVtgCreateObjectCopy(PSUPDRVDEVEXT pDevExt, PCVTGOBJHDR pVtgHdr, RTR3PTR R3PtrVtgHdr, RTUINTPTR uVtgHdrAddr,
|
---|
| 1719 | RTR3PTR R3PtrStrTab, uint32_t cbStrTab, uint32_t fFlags, PSUPDRVTRACERUMOD pUmod)
|
---|
| 1720 | {
|
---|
| 1721 | /*
|
---|
| 1722 | * Calculate the space required, allocate and copy in the data.
|
---|
| 1723 | */
|
---|
| 1724 | int rc;
|
---|
[62665] | 1725 | uint32_t const cProbeLocs = pVtgHdr->cbProbeLocs / (pVtgHdr->cBits == 32 ? sizeof(VTGPROBELOC32) : sizeof(VTGPROBELOC64));
|
---|
| 1726 | uint32_t const cbProbeLocs = cProbeLocs * sizeof(VTGPROBELOC);
|
---|
| 1727 | uint32_t const offProbeLocs = RT_ALIGN(pVtgHdr->cbObj, 8);
|
---|
[41117] | 1728 | size_t const cb = offProbeLocs + cbProbeLocs + cbStrTab + 1;
|
---|
| 1729 | PSUPDRVVTGCOPY pThis = (PSUPDRVVTGCOPY)RTMemAlloc(RT_OFFSETOF(SUPDRVVTGCOPY, Hdr) + cb);
|
---|
| 1730 | if (!pThis)
|
---|
| 1731 | return VERR_NO_MEMORY;
|
---|
| 1732 |
|
---|
| 1733 | pThis->u32Magic = SUDPRVVTGCOPY_MAGIC;
|
---|
| 1734 | pThis->cRefs = 1;
|
---|
| 1735 | pThis->cbStrTab = cbStrTab;
|
---|
| 1736 | pThis->fFlags = fFlags & SUP_TRACER_UMOD_FLAGS_TYPE_MASK;
|
---|
| 1737 | RTListInit(&pThis->ListEntry);
|
---|
| 1738 |
|
---|
| 1739 | rc = RTR0MemUserCopyFrom(&pThis->Hdr, R3PtrVtgHdr, pVtgHdr->cbObj);
|
---|
| 1740 | if (RT_SUCCESS(rc))
|
---|
| 1741 | {
|
---|
| 1742 | char *pchStrTab = (char *)&pThis->Hdr + offProbeLocs + cbProbeLocs;
|
---|
| 1743 | rc = RTR0MemUserCopyFrom(pchStrTab, R3PtrStrTab, cbStrTab);
|
---|
| 1744 | if (RT_SUCCESS(rc))
|
---|
| 1745 | {
|
---|
| 1746 | PVTGPROBELOC paDst = (PVTGPROBELOC)((char *)&pThis->Hdr + offProbeLocs);
|
---|
| 1747 | uint32_t i;
|
---|
| 1748 |
|
---|
| 1749 | /*
|
---|
| 1750 | * Some paranoia: Overwrite the header with the copy we've already
|
---|
| 1751 | * validated and zero terminate the string table.
|
---|
| 1752 | */
|
---|
| 1753 | pThis->Hdr = *pVtgHdr;
|
---|
| 1754 | pchStrTab[cbStrTab] = '\0';
|
---|
| 1755 |
|
---|
| 1756 | /*
|
---|
| 1757 | * Set the probe location array related header members since we're
|
---|
| 1758 | * making our own copy in a different location.
|
---|
| 1759 | */
|
---|
| 1760 | pThis->Hdr.uProbeLocs.u64 = (uintptr_t)paDst;
|
---|
| 1761 | pThis->Hdr.uProbeLocsEnd.u64 = (uintptr_t)paDst + cbProbeLocs;
|
---|
| 1762 | pThis->Hdr.offProbeLocs = offProbeLocs;
|
---|
| 1763 | pThis->Hdr.cbProbeLocs = cbProbeLocs;
|
---|
| 1764 | pThis->Hdr.cBits = ARCH_BITS;
|
---|
| 1765 |
|
---|
| 1766 | /*
|
---|
[41783] | 1767 | * Copy, convert and fix up the probe location table.
|
---|
[41117] | 1768 | */
|
---|
| 1769 | if (pVtgHdr->cBits == 32)
|
---|
| 1770 | {
|
---|
| 1771 | uintptr_t const offDelta = (uintptr_t)&pThis->Hdr - uVtgHdrAddr;
|
---|
| 1772 | PCVTGPROBELOC32 paSrc = (PCVTGPROBELOC32)pUmod->pvProbeLocs;
|
---|
| 1773 |
|
---|
| 1774 | for (i = 0; i < cProbeLocs; i++)
|
---|
| 1775 | {
|
---|
| 1776 | paDst[i].uLine = paSrc[i].uLine;
|
---|
| 1777 | paDst[i].fEnabled = paSrc[i].fEnabled;
|
---|
| 1778 | paDst[i].idProbe = paSrc[i].idProbe;
|
---|
| 1779 | if (paSrc[i].pszFunction > cbStrTab)
|
---|
| 1780 | {
|
---|
| 1781 | rc = VERR_SUPDRV_TRACER_UMOD_STRTAB_OFF_BAD;
|
---|
| 1782 | break;
|
---|
| 1783 | }
|
---|
| 1784 | paDst[i].pszFunction = pchStrTab + paSrc[i].pszFunction;
|
---|
[41130] | 1785 | paDst[i].pProbe = (PVTGDESCPROBE)(uintptr_t)(paSrc[i].pProbe + offDelta);
|
---|
[41117] | 1786 | }
|
---|
| 1787 | }
|
---|
| 1788 | else
|
---|
| 1789 | {
|
---|
| 1790 | uint64_t const offDelta = (uintptr_t)&pThis->Hdr - uVtgHdrAddr;
|
---|
| 1791 | PCVTGPROBELOC64 paSrc = (PCVTGPROBELOC64)pUmod->pvProbeLocs;
|
---|
| 1792 |
|
---|
| 1793 | for (i = 0; i < cProbeLocs; i++)
|
---|
| 1794 | {
|
---|
| 1795 | paDst[i].uLine = paSrc[i].uLine;
|
---|
| 1796 | paDst[i].fEnabled = paSrc[i].fEnabled;
|
---|
| 1797 | paDst[i].idProbe = paSrc[i].idProbe;
|
---|
| 1798 | if (paSrc[i].pszFunction > cbStrTab)
|
---|
| 1799 | {
|
---|
| 1800 | rc = VERR_SUPDRV_TRACER_UMOD_STRTAB_OFF_BAD;
|
---|
| 1801 | break;
|
---|
| 1802 | }
|
---|
| 1803 | paDst[i].pszFunction = pchStrTab + (uintptr_t)paSrc[i].pszFunction;
|
---|
[41130] | 1804 | paDst[i].pProbe = (PVTGDESCPROBE)(uintptr_t)(paSrc[i].pProbe + offDelta);
|
---|
[41117] | 1805 | }
|
---|
| 1806 | }
|
---|
| 1807 |
|
---|
| 1808 | /*
|
---|
| 1809 | * Validate it
|
---|
| 1810 | *
|
---|
| 1811 | * Note! fUmod is false as this is a kernel copy with all native
|
---|
| 1812 | * structures.
|
---|
| 1813 | */
|
---|
| 1814 | if (RT_SUCCESS(rc))
|
---|
| 1815 | rc = supdrvVtgValidate(&pThis->Hdr, (uintptr_t)&pThis->Hdr, (uint8_t *)&pThis->Hdr, cb, false /*fUmod*/);
|
---|
| 1816 | if (RT_SUCCESS(rc))
|
---|
| 1817 | {
|
---|
| 1818 | /*
|
---|
| 1819 | * Add it to the hash list, making sure nobody raced us.
|
---|
| 1820 | */
|
---|
| 1821 | PRTLISTANCHOR pHashList = &pDevExt->aTrackerUmodHash[ pVtgHdr->Uuid.au8[3]
|
---|
| 1822 | % RT_ELEMENTS(pDevExt->aTrackerUmodHash)];
|
---|
| 1823 |
|
---|
| 1824 | rc = RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 1825 | if (RT_SUCCESS(rc))
|
---|
| 1826 | {
|
---|
| 1827 | pUmod->pVtgCopy = supdrvVtgFindObjectCopyLocked(pHashList, pVtgHdr, cbStrTab, fFlags);
|
---|
| 1828 | if (!pUmod->pVtgCopy)
|
---|
| 1829 | {
|
---|
| 1830 | pUmod->pVtgCopy = pThis;
|
---|
| 1831 | RTListAppend(pHashList, &pThis->ListEntry);
|
---|
| 1832 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 1833 | return rc;
|
---|
| 1834 | }
|
---|
| 1835 |
|
---|
| 1836 | /*
|
---|
| 1837 | * Someone raced us, free our copy and return the existing
|
---|
| 1838 | * one instead.
|
---|
| 1839 | */
|
---|
| 1840 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 1841 | }
|
---|
| 1842 | }
|
---|
| 1843 | }
|
---|
[40759] | 1844 | }
|
---|
[41117] | 1845 | RTMemFree(pThis);
|
---|
| 1846 | return rc;
|
---|
| 1847 | }
|
---|
[40759] | 1848 |
|
---|
[41117] | 1849 |
|
---|
| 1850 | /**
|
---|
| 1851 | * Undoes what supdrvTracerUmodSetProbeIds did.
|
---|
| 1852 | *
|
---|
| 1853 | * @param pDevExt The device extension.
|
---|
| 1854 | * @param pSession The current session.
|
---|
| 1855 | * @param pUmod The user tracepoint module.
|
---|
| 1856 | */
|
---|
| 1857 | static void supdrvTracerUmodClearProbeIds(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPDRVTRACERUMOD pUmod)
|
---|
| 1858 | {
|
---|
| 1859 | uint32_t i;
|
---|
| 1860 |
|
---|
| 1861 | AssertReturnVoid(pUmod->iLookupTable < RT_ELEMENTS(pSession->apTpLookupTable));
|
---|
| 1862 | AssertReturnVoid(pSession->apTpLookupTable[pUmod->iLookupTable] == pUmod);
|
---|
| 1863 |
|
---|
[40759] | 1864 | /*
|
---|
[41117] | 1865 | * Clear the probe IDs and disable the probes.
|
---|
[40759] | 1866 | */
|
---|
[41117] | 1867 | i = pUmod->cProbeLocs;
|
---|
| 1868 | if (pUmod->cBits == 32)
|
---|
| 1869 | {
|
---|
| 1870 | PVTGPROBELOC32 paProbeLocs = (PVTGPROBELOC32)pUmod->pvProbeLocs;
|
---|
| 1871 | while (i-- > 0)
|
---|
| 1872 | paProbeLocs[i].idProbe = 0;
|
---|
| 1873 | }
|
---|
| 1874 | else
|
---|
| 1875 | {
|
---|
| 1876 | PVTGPROBELOC64 paProbeLocs = (PVTGPROBELOC64)pUmod->pvProbeLocs;
|
---|
| 1877 | while (i-- > 0)
|
---|
| 1878 | paProbeLocs[i].idProbe = 0;
|
---|
| 1879 | }
|
---|
| 1880 |
|
---|
| 1881 | /*
|
---|
| 1882 | * Free the lookup table entry. We'll have to wait for the table to go
|
---|
| 1883 | * idle to make sure there are no current users of pUmod.
|
---|
| 1884 | */
|
---|
| 1885 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 1886 | if (pSession->apTpLookupTable[pUmod->iLookupTable] == pUmod)
|
---|
| 1887 | {
|
---|
| 1888 | if (pSession->cTpProbesFiring > 0)
|
---|
| 1889 | {
|
---|
[41135] | 1890 | i = 0;
|
---|
[41117] | 1891 | while (pSession->cTpProbesFiring > 0)
|
---|
| 1892 | {
|
---|
| 1893 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 1894 | i++;
|
---|
| 1895 | if (!(i & 0xff))
|
---|
| 1896 | SUPR0Printf("supdrvTracerUmodClearProbeIds: waiting for lookup table to go idle (i=%u)\n", i);
|
---|
| 1897 | RTThreadSleep(10);
|
---|
| 1898 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 1899 | }
|
---|
| 1900 | }
|
---|
| 1901 | ASMAtomicWriteNullPtr(&pSession->apTpLookupTable[pUmod->iLookupTable]);
|
---|
| 1902 | }
|
---|
| 1903 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
[40759] | 1904 | }
|
---|
| 1905 |
|
---|
| 1906 |
|
---|
[41117] | 1907 | /**
|
---|
| 1908 | * Allocates a lookup table entry for the Umod and sets the
|
---|
| 1909 | * VTGPROBELOC::idProbe fields in user mode.
|
---|
| 1910 | *
|
---|
| 1911 | * @returns VINF_SUCCESS or VERR_SUPDRV_TRACER_TOO_MANY_PROVIDERS.
|
---|
| 1912 | * @param pDevExt The device extension.
|
---|
| 1913 | * @param pSession The current session.
|
---|
| 1914 | * @param pUmod The user tracepoint module.
|
---|
| 1915 | */
|
---|
| 1916 | static int supdrvTracerUmodSetProbeIds(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPDRVTRACERUMOD pUmod)
|
---|
[40981] | 1917 | {
|
---|
[41117] | 1918 | uint32_t iBase;
|
---|
| 1919 | uint32_t i;
|
---|
| 1920 |
|
---|
| 1921 | /*
|
---|
| 1922 | * Allocate a lookup table entry.
|
---|
| 1923 | */
|
---|
| 1924 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 1925 | for (i = 0; i < RT_ELEMENTS(pSession->apTpLookupTable); i++)
|
---|
| 1926 | {
|
---|
| 1927 | if (!pSession->apTpLookupTable[i])
|
---|
| 1928 | {
|
---|
| 1929 | pSession->apTpLookupTable[i] = pUmod;
|
---|
| 1930 | pUmod->iLookupTable = i;
|
---|
| 1931 | break;
|
---|
| 1932 | }
|
---|
| 1933 | }
|
---|
| 1934 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 1935 | if (i >= RT_ELEMENTS(pSession->apTpLookupTable))
|
---|
| 1936 | return VERR_SUPDRV_TRACER_TOO_MANY_PROVIDERS;
|
---|
| 1937 |
|
---|
| 1938 | /*
|
---|
| 1939 | * Set probe IDs of the usermode probe location to indicate our lookup
|
---|
| 1940 | * table entry as well as the probe location array entry.
|
---|
| 1941 | */
|
---|
| 1942 | iBase = (uint32_t)pUmod->iLookupTable << 24;
|
---|
| 1943 | i = pUmod->cProbeLocs;
|
---|
| 1944 | if (pUmod->cBits == 32)
|
---|
| 1945 | {
|
---|
| 1946 | PVTGPROBELOC32 paProbeLocs = (PVTGPROBELOC32)pUmod->pvProbeLocs;
|
---|
| 1947 | while (i-- > 0)
|
---|
| 1948 | paProbeLocs[i].idProbe = iBase | i;
|
---|
| 1949 | }
|
---|
| 1950 | else
|
---|
| 1951 | {
|
---|
| 1952 | PVTGPROBELOC64 paProbeLocs = (PVTGPROBELOC64)pUmod->pvProbeLocs;
|
---|
| 1953 | while (i-- > 0)
|
---|
| 1954 | paProbeLocs[i].idProbe = iBase | i;
|
---|
| 1955 | }
|
---|
| 1956 |
|
---|
| 1957 | return VINF_SUCCESS;
|
---|
[40981] | 1958 | }
|
---|
| 1959 |
|
---|
[41117] | 1960 |
|
---|
| 1961 | int VBOXCALL supdrvIOCtl_TracerUmodRegister(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession,
|
---|
| 1962 | RTR3PTR R3PtrVtgHdr, RTUINTPTR uVtgHdrAddr,
|
---|
| 1963 | RTR3PTR R3PtrStrTab, uint32_t cbStrTab,
|
---|
| 1964 | const char *pszModName, uint32_t fFlags)
|
---|
[40981] | 1965 | {
|
---|
[41117] | 1966 | VTGOBJHDR Hdr;
|
---|
| 1967 | PSUPDRVTRACERUMOD pUmod;
|
---|
| 1968 | RTR3PTR R3PtrLock;
|
---|
| 1969 | size_t cbLock;
|
---|
| 1970 | uint32_t cProbeLocs;
|
---|
| 1971 | int rc;
|
---|
| 1972 |
|
---|
| 1973 | /*
|
---|
| 1974 | * Validate input.
|
---|
| 1975 | */
|
---|
| 1976 | if (pSession->R0Process == NIL_RTR0PROCESS)
|
---|
| 1977 | return VERR_INVALID_CONTEXT;
|
---|
| 1978 | if ( fFlags != SUP_TRACER_UMOD_FLAGS_EXE
|
---|
| 1979 | && fFlags != SUP_TRACER_UMOD_FLAGS_SHARED)
|
---|
| 1980 | return VERR_INVALID_PARAMETER;
|
---|
| 1981 |
|
---|
| 1982 | if (pSession->cTpProviders >= RT_ELEMENTS(pSession->apTpLookupTable))
|
---|
| 1983 | return VERR_SUPDRV_TRACER_TOO_MANY_PROVIDERS;
|
---|
| 1984 |
|
---|
| 1985 | if ( cbStrTab < 2
|
---|
| 1986 | || cbStrTab > _1M)
|
---|
| 1987 | return VERR_SUPDRV_TRACER_UMOD_STRTAB_TOO_BIG;
|
---|
| 1988 |
|
---|
| 1989 | /*
|
---|
| 1990 | * Read the VTG header into a temporary buffer and perform some simple
|
---|
| 1991 | * validations to make sure we aren't wasting our time here.
|
---|
| 1992 | */
|
---|
| 1993 | rc = RTR0MemUserCopyFrom(&Hdr, R3PtrVtgHdr, sizeof(Hdr));
|
---|
| 1994 | if (RT_FAILURE(rc))
|
---|
| 1995 | return rc;
|
---|
| 1996 | rc = supdrvVtgValidateHdr(&Hdr, uVtgHdrAddr, NULL, 0, true /*fUmod*/);
|
---|
| 1997 | if (RT_FAILURE(rc))
|
---|
| 1998 | return rc;
|
---|
| 1999 | if (Hdr.cbProviders / sizeof(VTGDESCPROVIDER) > 2)
|
---|
| 2000 | return VERR_SUPDRV_TRACER_TOO_MANY_PROVIDERS;
|
---|
| 2001 |
|
---|
| 2002 | /*
|
---|
| 2003 | * Check how much needs to be locked down and how many probe locations
|
---|
| 2004 | * there are.
|
---|
| 2005 | */
|
---|
| 2006 | if ( Hdr.offProbeLocs <= 0
|
---|
| 2007 | || Hdr.offProbeEnabled > (uint32_t)Hdr.offProbeLocs
|
---|
| 2008 | || (uint32_t)Hdr.offProbeLocs - Hdr.offProbeEnabled - Hdr.cbProbeEnabled > 128)
|
---|
| 2009 | return VERR_SUPDRV_TRACER_UMOD_NOT_ADJACENT;
|
---|
| 2010 | R3PtrLock = R3PtrVtgHdr + Hdr.offProbeEnabled;
|
---|
| 2011 | cbLock = Hdr.offProbeLocs + Hdr.cbProbeLocs - Hdr.offProbeEnabled + (R3PtrLock & PAGE_OFFSET_MASK);
|
---|
| 2012 | R3PtrLock &= ~(RTR3PTR)PAGE_OFFSET_MASK;
|
---|
| 2013 | if (cbLock > _64K)
|
---|
| 2014 | return VERR_SUPDRV_TRACER_UMOD_TOO_MANY_PROBES;
|
---|
| 2015 |
|
---|
| 2016 | cProbeLocs = Hdr.cbProbeLocs / (Hdr.cBits == 32 ? sizeof(VTGPROBELOC32) : sizeof(VTGPROBELOC64));
|
---|
| 2017 |
|
---|
| 2018 | /*
|
---|
| 2019 | * Allocate the tracker data we keep in the session.
|
---|
| 2020 | */
|
---|
| 2021 | pUmod = (PSUPDRVTRACERUMOD)RTMemAllocZ( RT_OFFSETOF(SUPDRVTRACERUMOD, aProbeLocs[cProbeLocs])
|
---|
| 2022 | + (Hdr.cbProbeEnabled / sizeof(uint32_t) * sizeof(SUPDRVPROBEINFO)) );
|
---|
| 2023 | if (!pUmod)
|
---|
| 2024 | return VERR_NO_MEMORY;
|
---|
| 2025 | pUmod->u32Magic = SUPDRVTRACERUMOD_MAGIC;
|
---|
| 2026 | RTListInit(&pUmod->ListEntry);
|
---|
| 2027 | pUmod->R3PtrVtgHdr = R3PtrVtgHdr;
|
---|
| 2028 | pUmod->pVtgCopy = NULL;
|
---|
| 2029 | pUmod->hMemObjLock = NIL_RTR0MEMOBJ;
|
---|
| 2030 | pUmod->hMemObjMap = NIL_RTR0MEMOBJ;
|
---|
| 2031 | pUmod->R3PtrProbeLocs = (RTR3INTPTR)R3PtrVtgHdr + Hdr.offProbeLocs;
|
---|
| 2032 | pUmod->iLookupTable = UINT8_MAX;
|
---|
| 2033 | pUmod->cBits = Hdr.cBits;
|
---|
| 2034 | pUmod->cbProbeLoc = Hdr.cBits == 32 ? sizeof(VTGPROBELOC32) : sizeof(VTGPROBELOC64);
|
---|
| 2035 | pUmod->cProbeLocs = cProbeLocs;
|
---|
| 2036 |
|
---|
| 2037 | /*
|
---|
| 2038 | * Lock down and map the user-mode structures.
|
---|
| 2039 | */
|
---|
| 2040 | rc = RTR0MemObjLockUser(&pUmod->hMemObjLock, R3PtrLock, cbLock, RTMEM_PROT_READ | RTMEM_PROT_WRITE, NIL_RTR0PROCESS);
|
---|
| 2041 | if (RT_SUCCESS(rc))
|
---|
| 2042 | {
|
---|
| 2043 | rc = RTR0MemObjMapKernel(&pUmod->hMemObjMap, pUmod->hMemObjLock, (void *)-1, 0, RTMEM_PROT_READ | RTMEM_PROT_WRITE);
|
---|
| 2044 | if (RT_SUCCESS(rc))
|
---|
| 2045 | {
|
---|
| 2046 | pUmod->pacProbeEnabled = (uint32_t *)( (uintptr_t)RTR0MemObjAddress(pUmod->hMemObjMap)
|
---|
| 2047 | + ((uintptr_t)(R3PtrVtgHdr + Hdr.offProbeEnabled) & PAGE_OFFSET_MASK));
|
---|
| 2048 | pUmod->pvProbeLocs = (uint8_t *)pUmod->pacProbeEnabled + Hdr.offProbeLocs - Hdr.offProbeEnabled;
|
---|
| 2049 |
|
---|
| 2050 | /*
|
---|
| 2051 | * Does some other process use the same module already? If so,
|
---|
| 2052 | * share the VTG data with it. Otherwise, make a ring-0 copy it.
|
---|
| 2053 | */
|
---|
| 2054 | pUmod->pVtgCopy = supdrvVtgFindObjectCopy(pDevExt, &Hdr, cbStrTab, fFlags);
|
---|
| 2055 | if (!pUmod->pVtgCopy)
|
---|
| 2056 | rc = supdrvVtgCreateObjectCopy(pDevExt, &Hdr, R3PtrVtgHdr, uVtgHdrAddr, R3PtrStrTab, cbStrTab, fFlags, pUmod);
|
---|
| 2057 | if (RT_SUCCESS(rc))
|
---|
| 2058 | {
|
---|
| 2059 | AssertPtr(pUmod->pVtgCopy);
|
---|
| 2060 |
|
---|
| 2061 | /*
|
---|
| 2062 | * Grabe a place in apTpLookupTable and set the probe IDs
|
---|
| 2063 | * accordingly.
|
---|
| 2064 | */
|
---|
| 2065 | rc = supdrvTracerUmodSetProbeIds(pDevExt, pSession, pUmod);
|
---|
| 2066 | if (RT_SUCCESS(rc))
|
---|
| 2067 | {
|
---|
| 2068 | /*
|
---|
| 2069 | * Register the providers.
|
---|
| 2070 | */
|
---|
| 2071 | rc = supdrvTracerRegisterVtgObj(pDevExt, &pUmod->pVtgCopy->Hdr,
|
---|
| 2072 | NULL /*pImage*/, pSession, pUmod, pszModName);
|
---|
| 2073 | if (RT_SUCCESS(rc))
|
---|
| 2074 | {
|
---|
| 2075 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 2076 | RTListAppend(&pSession->TpUmods, &pUmod->ListEntry);
|
---|
| 2077 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 2078 |
|
---|
| 2079 | return VINF_SUCCESS;
|
---|
| 2080 | }
|
---|
| 2081 |
|
---|
| 2082 | /* bail out. */
|
---|
| 2083 | supdrvTracerUmodClearProbeIds(pDevExt, pSession, pUmod);
|
---|
| 2084 | }
|
---|
| 2085 | supdrvVtgReleaseObjectCopy(pDevExt, pUmod->pVtgCopy);
|
---|
| 2086 | }
|
---|
| 2087 | RTR0MemObjFree(pUmod->hMemObjMap, false /*fFreeMappings*/);
|
---|
| 2088 | }
|
---|
| 2089 | RTR0MemObjFree(pUmod->hMemObjLock, false /*fFreeMappings*/);
|
---|
| 2090 | }
|
---|
| 2091 | pUmod->u32Magic = ~SUPDRVTRACERUMOD_MAGIC;
|
---|
| 2092 | RTMemFree(pUmod);
|
---|
| 2093 | return rc;
|
---|
[40981] | 2094 | }
|
---|
| 2095 |
|
---|
[41117] | 2096 |
|
---|
| 2097 | int VBOXCALL supdrvIOCtl_TracerUmodDeregister(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, RTR3PTR R3PtrVtgHdr)
|
---|
[40981] | 2098 | {
|
---|
[41117] | 2099 | PSUPDRVTRACERUMOD pUmod = NULL;
|
---|
| 2100 | uint32_t i;
|
---|
| 2101 | int rc;
|
---|
[40981] | 2102 |
|
---|
[41117] | 2103 | /*
|
---|
| 2104 | * Validate the request.
|
---|
| 2105 | */
|
---|
| 2106 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 2107 | for (i = 0; i < RT_ELEMENTS(pSession->apTpLookupTable); i++)
|
---|
| 2108 | {
|
---|
| 2109 | pUmod = pSession->apTpLookupTable[i];
|
---|
| 2110 | if ( pUmod
|
---|
| 2111 | && pUmod->u32Magic == SUPDRVTRACERUMOD_MAGIC
|
---|
| 2112 | && pUmod->R3PtrVtgHdr == R3PtrVtgHdr)
|
---|
| 2113 | break;
|
---|
| 2114 | }
|
---|
| 2115 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 2116 | if (pUmod)
|
---|
| 2117 | {
|
---|
| 2118 | SUPDRVTPPROVIDER *pProvNext;
|
---|
| 2119 | SUPDRVTPPROVIDER *pProv;
|
---|
| 2120 |
|
---|
| 2121 | /*
|
---|
| 2122 | * Remove ourselves from the lookup table and clean up the ring-3 bits
|
---|
| 2123 | * we've dirtied. We do this first to make sure no probes are firing
|
---|
| 2124 | * when we're destroying the providers in the next step.
|
---|
| 2125 | */
|
---|
| 2126 | supdrvTracerUmodClearProbeIds(pDevExt, pSession, pUmod);
|
---|
| 2127 |
|
---|
| 2128 | /*
|
---|
| 2129 | * Deregister providers related to the VTG object.
|
---|
| 2130 | */
|
---|
| 2131 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 2132 | RTListForEachSafe(&pSession->TpProviders, pProv, pProvNext, SUPDRVTPPROVIDER, SessionListEntry)
|
---|
| 2133 | {
|
---|
| 2134 | if (pProv->pUmod == pUmod)
|
---|
| 2135 | supdrvTracerDeregisterVtgObj(pDevExt, pProv);
|
---|
| 2136 | }
|
---|
| 2137 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 2138 |
|
---|
| 2139 | /*
|
---|
| 2140 | * Destroy the Umod object.
|
---|
| 2141 | */
|
---|
| 2142 | pUmod->u32Magic = ~SUPDRVTRACERUMOD_MAGIC;
|
---|
| 2143 | supdrvVtgReleaseObjectCopy(pDevExt, pUmod->pVtgCopy);
|
---|
| 2144 | RTR0MemObjFree(pUmod->hMemObjMap, false /*fFreeMappings*/);
|
---|
| 2145 | RTR0MemObjFree(pUmod->hMemObjLock, false /*fFreeMappings*/);
|
---|
| 2146 | RTMemFree(pUmod);
|
---|
[44370] | 2147 | rc = VINF_SUCCESS;
|
---|
[41117] | 2148 | }
|
---|
| 2149 | else
|
---|
| 2150 | rc = VERR_NOT_FOUND;
|
---|
| 2151 | return rc;
|
---|
[40981] | 2152 | }
|
---|
| 2153 |
|
---|
| 2154 |
|
---|
[40759] | 2155 | /**
|
---|
[41117] | 2156 | * Implementation of supdrvIOCtl_TracerUmodProbeFire and
|
---|
| 2157 | * SUPR0TracerUmodProbeFire.
|
---|
| 2158 | *
|
---|
| 2159 | * @param pDevExt The device extension.
|
---|
| 2160 | * @param pSession The calling session.
|
---|
| 2161 | * @param pCtx The context record.
|
---|
| 2162 | */
|
---|
| 2163 | static void supdrvTracerUmodProbeFire(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPDRVTRACERUSRCTX pCtx)
|
---|
| 2164 | {
|
---|
| 2165 | /*
|
---|
| 2166 | * We cannot trust user mode to hand us the right bits nor not calling us
|
---|
| 2167 | * when disabled. So, we have to check for our selves.
|
---|
| 2168 | */
|
---|
| 2169 | PSUPDRVTRACERUMOD pUmod;
|
---|
| 2170 | uint32_t const iLookupTable = pCtx->idProbe >> 24;
|
---|
| 2171 | uint32_t const iProbeLoc = pCtx->idProbe & UINT32_C(0x00ffffff);
|
---|
| 2172 |
|
---|
| 2173 | if (RT_UNLIKELY( !pDevExt->pTracerOps
|
---|
| 2174 | || pDevExt->fTracerUnloading))
|
---|
| 2175 | return;
|
---|
| 2176 | if (RT_UNLIKELY(iLookupTable >= RT_ELEMENTS(pSession->apTpLookupTable)))
|
---|
| 2177 | return;
|
---|
| 2178 | if (RT_UNLIKELY( pCtx->cBits != 32
|
---|
| 2179 | && pCtx->cBits != 64))
|
---|
| 2180 | return;
|
---|
| 2181 |
|
---|
| 2182 | ASMAtomicIncU32(&pSession->cTpProviders);
|
---|
| 2183 |
|
---|
| 2184 | pUmod = pSession->apTpLookupTable[iLookupTable];
|
---|
| 2185 | if (RT_LIKELY(pUmod))
|
---|
| 2186 | {
|
---|
| 2187 | if (RT_LIKELY( pUmod->u32Magic == SUPDRVTRACERUMOD_MAGIC
|
---|
| 2188 | && iProbeLoc < pUmod->cProbeLocs
|
---|
| 2189 | && pCtx->cBits == pUmod->cBits))
|
---|
| 2190 | {
|
---|
[41156] | 2191 | #if 0 /* This won't work for RC modules. */
|
---|
[41117] | 2192 | RTR3PTR R3PtrProbeLoc = pUmod->R3PtrProbeLocs + iProbeLoc * pUmod->cbProbeLoc;
|
---|
| 2193 | if (RT_LIKELY( (pCtx->cBits == 32 ? (RTR3PTR)pCtx->u.X86.uVtgProbeLoc : pCtx->u.Amd64.uVtgProbeLoc)
|
---|
| 2194 | == R3PtrProbeLoc))
|
---|
[41156] | 2195 | #endif
|
---|
[41117] | 2196 | {
|
---|
| 2197 | if (RT_LIKELY(pUmod->aProbeLocs[iProbeLoc].fEnabled))
|
---|
| 2198 | {
|
---|
[41130] | 2199 | PSUPDRVVTGCOPY pVtgCopy;
|
---|
[41117] | 2200 | ASMAtomicIncU32(&pDevExt->cTracerCallers);
|
---|
[41130] | 2201 | pVtgCopy = pUmod->pVtgCopy;
|
---|
[41117] | 2202 | if (RT_LIKELY( pDevExt->pTracerOps
|
---|
[41130] | 2203 | && !pDevExt->fTracerUnloading
|
---|
| 2204 | && pVtgCopy))
|
---|
[41117] | 2205 | {
|
---|
[41130] | 2206 | PCVTGPROBELOC pProbeLocRO;
|
---|
| 2207 | pProbeLocRO = (PCVTGPROBELOC)((uintptr_t)&pVtgCopy->Hdr + pVtgCopy->Hdr.offProbeLocs) + iProbeLoc;
|
---|
| 2208 |
|
---|
[41117] | 2209 | pCtx->idProbe = pUmod->aProbeLocs[iProbeLoc].idProbe;
|
---|
[41130] | 2210 | pDevExt->pTracerOps->pfnProbeFireUser(pDevExt->pTracerOps, pSession, pCtx, &pVtgCopy->Hdr, pProbeLocRO);
|
---|
[41117] | 2211 | }
|
---|
| 2212 | ASMAtomicDecU32(&pDevExt->cTracerCallers);
|
---|
| 2213 | }
|
---|
| 2214 | }
|
---|
| 2215 | }
|
---|
| 2216 | }
|
---|
| 2217 |
|
---|
| 2218 | ASMAtomicDecU32(&pSession->cTpProviders);
|
---|
| 2219 | }
|
---|
| 2220 |
|
---|
| 2221 |
|
---|
| 2222 | SUPR0DECL(void) SUPR0TracerUmodProbeFire(PSUPDRVSESSION pSession, PSUPDRVTRACERUSRCTX pCtx)
|
---|
| 2223 | {
|
---|
| 2224 | AssertReturnVoid(SUP_IS_SESSION_VALID(pSession));
|
---|
| 2225 | AssertPtrReturnVoid(pCtx);
|
---|
| 2226 |
|
---|
| 2227 | supdrvTracerUmodProbeFire(pSession->pDevExt, pSession, pCtx);
|
---|
| 2228 | }
|
---|
| 2229 |
|
---|
| 2230 |
|
---|
| 2231 | void VBOXCALL supdrvIOCtl_TracerUmodProbeFire(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPDRVTRACERUSRCTX pCtx)
|
---|
| 2232 | {
|
---|
| 2233 | supdrvTracerUmodProbeFire(pDevExt, pSession, pCtx);
|
---|
| 2234 | }
|
---|
| 2235 |
|
---|
| 2236 |
|
---|
| 2237 | /**
|
---|
[40819] | 2238 | * Open the tracer.
|
---|
| 2239 | *
|
---|
| 2240 | * @returns VBox status code
|
---|
| 2241 | * @param pDevExt The device extension structure.
|
---|
| 2242 | * @param pSession The current session.
|
---|
| 2243 | * @param uCookie The tracer cookie.
|
---|
| 2244 | * @param uArg The tracer open argument.
|
---|
| 2245 | */
|
---|
| 2246 | int VBOXCALL supdrvIOCtl_TracerOpen(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, uint32_t uCookie, uintptr_t uArg)
|
---|
| 2247 | {
|
---|
| 2248 | RTNATIVETHREAD hNativeSelf = RTThreadNativeSelf();
|
---|
| 2249 | int rc;
|
---|
| 2250 |
|
---|
| 2251 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 2252 |
|
---|
| 2253 | if (!pSession->uTracerData)
|
---|
| 2254 | {
|
---|
| 2255 | if (pDevExt->pTracerOps)
|
---|
| 2256 | {
|
---|
| 2257 | if (pDevExt->pTracerSession != pSession)
|
---|
| 2258 | {
|
---|
| 2259 | if (!pDevExt->fTracerUnloading)
|
---|
| 2260 | {
|
---|
| 2261 | if (pSession->hTracerCaller == NIL_RTNATIVETHREAD)
|
---|
| 2262 | {
|
---|
| 2263 | pDevExt->cTracerOpens++;
|
---|
| 2264 | pSession->uTracerData = ~(uintptr_t)0;
|
---|
| 2265 | pSession->hTracerCaller = hNativeSelf;
|
---|
| 2266 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 2267 |
|
---|
| 2268 | rc = pDevExt->pTracerOps->pfnTracerOpen(pDevExt->pTracerOps, pSession, uCookie, uArg, &pSession->uTracerData);
|
---|
| 2269 |
|
---|
| 2270 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 2271 | if (RT_FAILURE(rc))
|
---|
| 2272 | {
|
---|
| 2273 | pDevExt->cTracerOpens--;
|
---|
| 2274 | pSession->uTracerData = 0;
|
---|
| 2275 | }
|
---|
| 2276 | pSession->hTracerCaller = NIL_RTNATIVETHREAD;
|
---|
| 2277 | }
|
---|
| 2278 | else
|
---|
| 2279 | rc = VERR_SUPDRV_TRACER_SESSION_BUSY;
|
---|
| 2280 | }
|
---|
| 2281 | else
|
---|
| 2282 | rc = VERR_SUPDRV_TRACER_UNLOADING;
|
---|
| 2283 | }
|
---|
| 2284 | else
|
---|
| 2285 | rc = VERR_SUPDRV_TRACER_CANNOT_OPEN_SELF;
|
---|
| 2286 | }
|
---|
| 2287 | else
|
---|
| 2288 | rc = VERR_SUPDRV_TRACER_NOT_PRESENT;
|
---|
| 2289 | }
|
---|
| 2290 | else
|
---|
| 2291 | rc = VERR_SUPDRV_TRACER_ALREADY_OPENED;
|
---|
| 2292 |
|
---|
| 2293 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 2294 | return rc;
|
---|
| 2295 | }
|
---|
| 2296 |
|
---|
| 2297 |
|
---|
| 2298 | /**
|
---|
| 2299 | * Closes the tracer.
|
---|
| 2300 | *
|
---|
| 2301 | * @returns VBox status code.
|
---|
| 2302 | * @param pDevExt The device extension structure.
|
---|
| 2303 | * @param pSession The current session.
|
---|
| 2304 | */
|
---|
| 2305 | int VBOXCALL supdrvIOCtl_TracerClose(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession)
|
---|
| 2306 | {
|
---|
| 2307 | RTNATIVETHREAD hNativeSelf = RTThreadNativeSelf();
|
---|
| 2308 | int rc;
|
---|
| 2309 |
|
---|
| 2310 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 2311 |
|
---|
| 2312 | if (pSession->uTracerData)
|
---|
| 2313 | {
|
---|
| 2314 | Assert(pDevExt->cTracerOpens > 0);
|
---|
| 2315 |
|
---|
| 2316 | if (pDevExt->pTracerOps)
|
---|
| 2317 | {
|
---|
| 2318 | if (pSession->hTracerCaller == NIL_RTNATIVETHREAD)
|
---|
| 2319 | {
|
---|
| 2320 | uintptr_t uTracerData = pSession->uTracerData;
|
---|
| 2321 | pSession->uTracerData = 0;
|
---|
| 2322 | pSession->hTracerCaller = hNativeSelf;
|
---|
| 2323 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 2324 |
|
---|
| 2325 | pDevExt->pTracerOps->pfnTracerClose(pDevExt->pTracerOps, pSession, uTracerData);
|
---|
| 2326 | rc = VINF_SUCCESS;
|
---|
| 2327 |
|
---|
| 2328 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 2329 | pSession->hTracerCaller = NIL_RTNATIVETHREAD;
|
---|
| 2330 | Assert(pDevExt->cTracerOpens > 0);
|
---|
| 2331 | pDevExt->cTracerOpens--;
|
---|
| 2332 | }
|
---|
| 2333 | else
|
---|
| 2334 | rc = VERR_SUPDRV_TRACER_SESSION_BUSY;
|
---|
| 2335 | }
|
---|
| 2336 | else
|
---|
| 2337 | {
|
---|
| 2338 | rc = VERR_SUPDRV_TRACER_NOT_PRESENT;
|
---|
| 2339 | pSession->uTracerData = 0;
|
---|
| 2340 | Assert(pDevExt->cTracerOpens > 0);
|
---|
| 2341 | pDevExt->cTracerOpens--;
|
---|
| 2342 | }
|
---|
| 2343 | }
|
---|
| 2344 | else
|
---|
| 2345 | rc = VERR_SUPDRV_TRACER_NOT_OPENED;
|
---|
| 2346 |
|
---|
| 2347 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 2348 | return rc;
|
---|
| 2349 | }
|
---|
| 2350 |
|
---|
| 2351 |
|
---|
| 2352 | /**
|
---|
| 2353 | * Performs a tracer I/O control request.
|
---|
| 2354 | *
|
---|
| 2355 | * @returns VBox status code.
|
---|
| 2356 | * @param pDevExt The device extension structure.
|
---|
| 2357 | * @param pSession The current session.
|
---|
| 2358 | * @param uCmd The tracer command.
|
---|
| 2359 | * @param uArg The tracer argument.
|
---|
| 2360 | * @param piRetVal Where to store the tracer specific return value.
|
---|
| 2361 | */
|
---|
| 2362 | int VBOXCALL supdrvIOCtl_TracerIOCtl(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, uintptr_t uCmd, uintptr_t uArg, int32_t *piRetVal)
|
---|
| 2363 | {
|
---|
| 2364 | RTNATIVETHREAD hNativeSelf = RTThreadNativeSelf();
|
---|
| 2365 | int rc;
|
---|
| 2366 |
|
---|
[40823] | 2367 | *piRetVal = 0;
|
---|
[40819] | 2368 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 2369 |
|
---|
| 2370 | if (pSession->uTracerData)
|
---|
| 2371 | {
|
---|
| 2372 | Assert(pDevExt->cTracerOpens > 0);
|
---|
| 2373 | if (pDevExt->pTracerOps)
|
---|
| 2374 | {
|
---|
| 2375 | if (!pDevExt->fTracerUnloading)
|
---|
| 2376 | {
|
---|
| 2377 | if (pSession->hTracerCaller == NIL_RTNATIVETHREAD)
|
---|
| 2378 | {
|
---|
| 2379 | uintptr_t uTracerData = pSession->uTracerData;
|
---|
| 2380 | pDevExt->cTracerOpens++;
|
---|
| 2381 | pSession->hTracerCaller = hNativeSelf;
|
---|
| 2382 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 2383 |
|
---|
| 2384 | rc = pDevExt->pTracerOps->pfnTracerIoCtl(pDevExt->pTracerOps, pSession, uTracerData, uCmd, uArg, piRetVal);
|
---|
| 2385 |
|
---|
| 2386 | RTSemFastMutexRequest(pDevExt->mtxTracer);
|
---|
| 2387 | pSession->hTracerCaller = NIL_RTNATIVETHREAD;
|
---|
| 2388 | Assert(pDevExt->cTracerOpens > 0);
|
---|
| 2389 | pDevExt->cTracerOpens--;
|
---|
| 2390 | }
|
---|
| 2391 | else
|
---|
| 2392 | rc = VERR_SUPDRV_TRACER_SESSION_BUSY;
|
---|
| 2393 | }
|
---|
| 2394 | else
|
---|
| 2395 | rc = VERR_SUPDRV_TRACER_UNLOADING;
|
---|
| 2396 | }
|
---|
| 2397 | else
|
---|
| 2398 | rc = VERR_SUPDRV_TRACER_NOT_PRESENT;
|
---|
| 2399 | }
|
---|
| 2400 | else
|
---|
| 2401 | rc = VERR_SUPDRV_TRACER_NOT_OPENED;
|
---|
| 2402 |
|
---|
| 2403 | RTSemFastMutexRelease(pDevExt->mtxTracer);
|
---|
| 2404 | return rc;
|
---|
| 2405 | }
|
---|
| 2406 |
|
---|
| 2407 |
|
---|
| 2408 | /**
|
---|
[40756] | 2409 | * Early module initialization hook.
|
---|
| 2410 | *
|
---|
| 2411 | * @returns VBox status code.
|
---|
| 2412 | * @param pDevExt The device extension structure.
|
---|
[40518] | 2413 | */
|
---|
[40756] | 2414 | int VBOXCALL supdrvTracerInit(PSUPDRVDEVEXT pDevExt)
|
---|
[40518] | 2415 | {
|
---|
[40756] | 2416 | /*
|
---|
[40851] | 2417 | * Initialize the tracer.
|
---|
[40756] | 2418 | */
|
---|
| 2419 | int rc = RTSemFastMutexCreate(&pDevExt->mtxTracer);
|
---|
| 2420 | if (RT_SUCCESS(rc))
|
---|
[40602] | 2421 | {
|
---|
[41117] | 2422 | uint32_t i;
|
---|
| 2423 |
|
---|
[40756] | 2424 | pDevExt->TracerHlp.uVersion = SUPDRVTRACERHLP_VERSION;
|
---|
| 2425 | /** @todo */
|
---|
| 2426 | pDevExt->TracerHlp.uEndVersion = SUPDRVTRACERHLP_VERSION;
|
---|
| 2427 | RTListInit(&pDevExt->TracerProviderList);
|
---|
| 2428 | RTListInit(&pDevExt->TracerProviderZombieList);
|
---|
[41117] | 2429 | for (i = 0; i < RT_ELEMENTS(pDevExt->aTrackerUmodHash); i++)
|
---|
| 2430 | RTListInit(&pDevExt->aTrackerUmodHash[i]);
|
---|
[40759] | 2431 |
|
---|
[40975] | 2432 | #ifdef VBOX_WITH_NATIVE_DTRACE
|
---|
[40851] | 2433 | pDevExt->pTracerOps = supdrvDTraceInit();
|
---|
[40867] | 2434 | if (pDevExt->pTracerOps)
|
---|
| 2435 | g_pfnSupdrvProbeFireKernel = (PFNRT)pDevExt->pTracerOps->pfnProbeFireKernel;
|
---|
[40851] | 2436 | #endif
|
---|
| 2437 |
|
---|
[40867] | 2438 | /*
|
---|
[40851] | 2439 | * Register the provider for this module, if compiled in.
|
---|
| 2440 | */
|
---|
[40777] | 2441 | #ifdef VBOX_WITH_DTRACE_R0DRV
|
---|
[41117] | 2442 | rc = supdrvTracerRegisterVtgObj(pDevExt, &g_VTGObjHeader, NULL /*pImage*/, NULL /*pSession*/, NULL /*pUmod*/, "vboxdrv");
|
---|
[40756] | 2443 | if (RT_SUCCESS(rc))
|
---|
| 2444 | return rc;
|
---|
[40851] | 2445 | SUPR0Printf("supdrvTracerInit: supdrvTracerRegisterVtgObj failed with rc=%d\n", rc);
|
---|
[40756] | 2446 | RTSemFastMutexDestroy(pDevExt->mtxTracer);
|
---|
[40851] | 2447 | #else
|
---|
| 2448 |
|
---|
| 2449 | return VINF_SUCCESS;
|
---|
| 2450 | #endif
|
---|
[40602] | 2451 | }
|
---|
[40756] | 2452 | pDevExt->mtxTracer = NIL_RTSEMFASTMUTEX;
|
---|
| 2453 | return rc;
|
---|
[40518] | 2454 | }
|
---|
| 2455 |
|
---|
| 2456 |
|
---|
| 2457 | /**
|
---|
[40756] | 2458 | * Late module termination hook.
|
---|
| 2459 | *
|
---|
| 2460 | * @returns VBox status code.
|
---|
| 2461 | * @param pDevExt The device extension structure.
|
---|
[40518] | 2462 | */
|
---|
[40756] | 2463 | void VBOXCALL supdrvTracerTerm(PSUPDRVDEVEXT pDevExt)
|
---|
[40518] | 2464 | {
|
---|
[40756] | 2465 | LOG_TRACER(("supdrvTracerTerm\n"));
|
---|
[40518] | 2466 |
|
---|
[40756] | 2467 | supdrvTracerRemoveAllProviders(pDevExt);
|
---|
[40518] | 2468 |
|
---|
[40756] | 2469 | RTSemFastMutexDestroy(pDevExt->mtxTracer);
|
---|
| 2470 | pDevExt->mtxTracer = NIL_RTSEMFASTMUTEX;
|
---|
| 2471 | LOG_TRACER(("supdrvTracerTerm: Done\n"));
|
---|
[40518] | 2472 | }
|
---|
| 2473 |
|
---|