[37410] | 1 | /* $Id: DBGFR3Trace.cpp 80191 2019-08-08 00:36:57Z vboxsync $ */
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| 2 | /** @file
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| 3 | * DBGF - Debugger Facility, Tracing.
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| 4 | */
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| 5 |
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| 6 | /*
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[76553] | 7 | * Copyright (C) 2011-2019 Oracle Corporation
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[37410] | 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 |
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| 18 |
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[57358] | 19 | /*********************************************************************************************************************************
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| 20 | * Header Files *
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| 21 | *********************************************************************************************************************************/
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[80191] | 22 | #define VBOX_BUGREF_9217_PART_I
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[37410] | 23 | #define LOG_GROUP LOG_GROUP_DBGF
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| 24 | #include <VBox/vmm/dbgftrace.h>
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| 25 | #include <VBox/vmm/cfgm.h>
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| 26 | #include <VBox/vmm/mm.h>
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[40405] | 27 | #include <VBox/vmm/pdmapi.h>
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[37410] | 28 | #include "DBGFInternal.h"
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| 29 | #include <VBox/vmm/vm.h>
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[40405] | 30 | #include "VMMTracing.h"
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[37410] | 31 |
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| 32 | #include <VBox/err.h>
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| 33 | #include <VBox/log.h>
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| 34 | #include <VBox/param.h>
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| 35 |
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| 36 | #include <iprt/assert.h>
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[40405] | 37 | #include <iprt/ctype.h>
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[37410] | 38 | #include <iprt/trace.h>
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| 39 |
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| 40 |
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[57358] | 41 | /*********************************************************************************************************************************
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| 42 | * Internal Functions *
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| 43 | *********************************************************************************************************************************/
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[37410] | 44 | static DECLCALLBACK(void) dbgfR3TraceInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
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| 45 |
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| 46 |
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[57358] | 47 | /*********************************************************************************************************************************
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| 48 | * Global Variables *
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| 49 | *********************************************************************************************************************************/
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[37410] | 50 | /**
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[40405] | 51 | * VMM trace point group translation table.
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| 52 | */
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| 53 | static const struct
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| 54 | {
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[40557] | 55 | /** The group name. */
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| 56 | const char *pszName;
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| 57 | /** The name length. */
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| 58 | uint32_t cchName;
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[40405] | 59 | /** The mask. */
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| 60 | uint32_t fMask;
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| 61 | } g_aVmmTpGroups[] =
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| 62 | {
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[40557] | 63 | { RT_STR_TUPLE("em"), VMMTPGROUP_EM },
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| 64 | { RT_STR_TUPLE("hm"), VMMTPGROUP_HM },
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| 65 | { RT_STR_TUPLE("tm"), VMMTPGROUP_TM },
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[40405] | 66 | };
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| 67 |
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| 68 |
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| 69 | /**
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[37410] | 70 | * Initializes the tracing.
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| 71 | *
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| 72 | * @returns VBox status code
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[58126] | 73 | * @param pVM The cross context VM structure.
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| 74 | * @param cbEntry The trace entry size.
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| 75 | * @param cEntries The number of entries.
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[37410] | 76 | */
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| 77 | static int dbgfR3TraceEnable(PVM pVM, uint32_t cbEntry, uint32_t cEntries)
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| 78 | {
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| 79 | /*
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| 80 | * Don't enable it twice.
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| 81 | */
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| 82 | if (pVM->hTraceBufR3 != NIL_RTTRACEBUF)
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| 83 | return VERR_ALREADY_EXISTS;
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| 84 |
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| 85 | /*
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| 86 | * Resolve default parameter values.
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| 87 | */
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| 88 | int rc;
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| 89 | if (!cbEntry)
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| 90 | {
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| 91 | rc = CFGMR3QueryU32Def(CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF"), "TraceBufEntrySize", &cbEntry, 128);
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| 92 | AssertRCReturn(rc, rc);
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| 93 | }
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| 94 | if (!cEntries)
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| 95 | {
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| 96 | rc = CFGMR3QueryU32Def(CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF"), "TraceBufEntries", &cEntries, 4096);
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| 97 | AssertRCReturn(rc, rc);
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| 98 | }
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| 99 |
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| 100 | /*
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| 101 | * Figure the required size.
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| 102 | */
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| 103 | RTTRACEBUF hTraceBuf;
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| 104 | size_t cbBlock = 0;
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| 105 | rc = RTTraceBufCarve(&hTraceBuf, cEntries, cbEntry, 0 /*fFlags*/, NULL, &cbBlock);
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| 106 | if (rc != VERR_BUFFER_OVERFLOW)
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| 107 | {
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[39405] | 108 | AssertReturn(!RT_SUCCESS_NP(rc), VERR_IPE_UNEXPECTED_INFO_STATUS);
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[37410] | 109 | return rc;
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| 110 | }
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| 111 |
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| 112 | /*
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| 113 | * Allocate a hyper heap block and carve a trace buffer out of it.
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| 114 | *
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| 115 | * Note! We ASSUME that the returned trace buffer handle has the same value
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| 116 | * as the heap block.
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| 117 | */
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| 118 | cbBlock = RT_ALIGN_Z(cbBlock, PAGE_SIZE);
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| 119 | void *pvBlock;
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| 120 | rc = MMR3HyperAllocOnceNoRel(pVM, cbBlock, PAGE_SIZE, MM_TAG_DBGF, &pvBlock);
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| 121 | if (RT_FAILURE(rc))
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| 122 | return rc;
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| 123 |
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| 124 | rc = RTTraceBufCarve(&hTraceBuf, cEntries, cbEntry, 0 /*fFlags*/, pvBlock, &cbBlock);
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| 125 | AssertRCReturn(rc, rc);
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[63753] | 126 | AssertRelease(hTraceBuf == (RTTRACEBUF)pvBlock);
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| 127 | AssertRelease((void *)hTraceBuf == pvBlock);
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[37410] | 128 |
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| 129 | pVM->hTraceBufR3 = hTraceBuf;
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| 130 | pVM->hTraceBufR0 = MMHyperCCToR0(pVM, hTraceBuf);
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| 131 | return VINF_SUCCESS;
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| 132 | }
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| 133 |
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| 134 |
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| 135 | /**
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| 136 | * Initializes the tracing.
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| 137 | *
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| 138 | * @returns VBox status code
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[58122] | 139 | * @param pVM The cross context VM structure.
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[37410] | 140 | */
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| 141 | int dbgfR3TraceInit(PVM pVM)
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| 142 | {
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| 143 | /*
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| 144 | * Initialize the trace buffer handles.
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| 145 | */
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| 146 | Assert(NIL_RTTRACEBUF == (RTTRACEBUF)NULL);
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| 147 | pVM->hTraceBufR3 = NIL_RTTRACEBUF;
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| 148 | pVM->hTraceBufR0 = NIL_RTR0PTR;
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| 149 |
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| 150 | /*
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| 151 | * Check the config and enable tracing if requested.
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| 152 | */
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[40405] | 153 | PCFGMNODE pDbgfNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF");
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[37410] | 154 | #if defined(DEBUG) || defined(RTTRACE_ENABLED)
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[47238] | 155 | bool const fDefault = false;
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| 156 | const char * const pszConfigDefault = "";
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[37410] | 157 | #else
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[40405] | 158 | bool const fDefault = false;
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| 159 | const char * const pszConfigDefault = "";
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[37410] | 160 | #endif
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[40405] | 161 | bool fTracingEnabled;
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| 162 | int rc = CFGMR3QueryBoolDef(pDbgfNode, "TracingEnabled", &fTracingEnabled, fDefault);
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[37410] | 163 | AssertRCReturn(rc, rc);
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| 164 | if (fTracingEnabled)
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[40405] | 165 | {
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[37410] | 166 | rc = dbgfR3TraceEnable(pVM, 0, 0);
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[40405] | 167 | if (RT_SUCCESS(rc))
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| 168 | {
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[41975] | 169 | if (pDbgfNode)
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[40405] | 170 | {
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[41975] | 171 | char *pszTracingConfig;
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| 172 | rc = CFGMR3QueryStringAllocDef(pDbgfNode, "TracingConfig", &pszTracingConfig, pszConfigDefault);
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| 173 | if (RT_SUCCESS(rc))
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| 174 | {
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| 175 | rc = DBGFR3TraceConfig(pVM, pszTracingConfig);
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| 176 | if (RT_FAILURE(rc))
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| 177 | rc = VMSetError(pVM, rc, RT_SRC_POS, "TracingConfig=\"%s\" -> %Rrc", pszTracingConfig, rc);
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| 178 | MMR3HeapFree(pszTracingConfig);
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| 179 | }
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| 180 | }
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| 181 | else
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| 182 | {
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| 183 | rc = DBGFR3TraceConfig(pVM, pszConfigDefault);
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[40405] | 184 | if (RT_FAILURE(rc))
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[41975] | 185 | rc = VMSetError(pVM, rc, RT_SRC_POS, "TracingConfig=\"%s\" (default) -> %Rrc", pszConfigDefault, rc);
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[40405] | 186 | }
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| 187 | }
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| 188 | }
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[37410] | 189 |
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| 190 | /*
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| 191 | * Register a debug info item that will dump the trace buffer content.
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| 192 | */
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| 193 | if (RT_SUCCESS(rc))
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| 194 | rc = DBGFR3InfoRegisterInternal(pVM, "tracebuf", "Display the trace buffer content. No arguments.", dbgfR3TraceInfo);
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| 195 |
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| 196 | return rc;
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| 197 | }
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| 198 |
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| 199 |
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| 200 | /**
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| 201 | * Terminates the tracing.
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| 202 | *
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[58122] | 203 | * @param pVM The cross context VM structure.
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[37410] | 204 | */
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| 205 | void dbgfR3TraceTerm(PVM pVM)
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| 206 | {
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| 207 | /* nothing to do */
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| 208 | NOREF(pVM);
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| 209 | }
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| 210 |
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| 211 |
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| 212 | /**
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| 213 | * Relocates the trace buffer handle in RC.
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| 214 | *
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[58122] | 215 | * @param pVM The cross context VM structure.
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[37410] | 216 | */
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| 217 | void dbgfR3TraceRelocate(PVM pVM)
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| 218 | {
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[79995] | 219 | RT_NOREF(pVM);
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[37410] | 220 | }
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| 221 |
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| 222 |
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| 223 | /**
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[40405] | 224 | * Change the traceing configuration of the VM.
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| 225 | *
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| 226 | * @returns VBox status code.
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| 227 | * @retval VINF_SUCCESS
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| 228 | * @retval VERR_NOT_FOUND if any of the trace point groups mentioned in the
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| 229 | * config string cannot be found. (Or if the string cannot be made
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| 230 | * sense of.) No change made.
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| 231 | * @retval VERR_INVALID_VM_HANDLE
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| 232 | * @retval VERR_INVALID_POINTER
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| 233 | *
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[58122] | 234 | * @param pVM The cross context VM structure.
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[40405] | 235 | * @param pszConfig The configuration change specification.
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| 236 | *
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| 237 | * Trace point group names, optionally prefixed by a '-' to
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| 238 | * indicate that the group is being disabled. A special
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| 239 | * group 'all' can be used to enable or disable all trace
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| 240 | * points.
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| 241 | *
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| 242 | * Drivers, devices and USB devices each have their own
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| 243 | * trace point group which can be accessed by prefixing
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| 244 | * their official PDM name by 'drv', 'dev' or 'usb'
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| 245 | * respectively.
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| 246 | */
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| 247 | VMMDECL(int) DBGFR3TraceConfig(PVM pVM, const char *pszConfig)
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| 248 | {
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| 249 | VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
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| 250 | AssertPtrReturn(pszConfig, VERR_INVALID_POINTER);
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| 251 | if (pVM->hTraceBufR3 == NIL_RTTRACEBUF)
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| 252 | return VERR_DBGF_NO_TRACE_BUFFER;
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| 253 |
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| 254 | /*
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| 255 | * We do this in two passes, the first pass just validates the input string
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| 256 | * and the second applies the changes.
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| 257 | */
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| 258 | for (uint32_t uPass = 0; uPass < 1; uPass++)
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| 259 | {
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| 260 | char ch;
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| 261 | while ((ch = *pszConfig) != '\0')
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| 262 | {
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| 263 | if (RT_C_IS_SPACE(ch))
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| 264 | continue;
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| 265 |
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| 266 | /*
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| 267 | * Operation prefix.
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| 268 | */
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| 269 | bool fNo = false;
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| 270 | do
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| 271 | {
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| 272 | if (ch == 'n' && pszConfig[1] == 'o')
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| 273 | {
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| 274 | fNo = !fNo;
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| 275 | pszConfig++;
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| 276 | }
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| 277 | else if (ch == '+')
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| 278 | fNo = false;
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| 279 | else if (ch == '-' || ch == '!' || ch == '~')
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| 280 | fNo = !fNo;
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| 281 | else
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| 282 | break;
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| 283 | } while ((ch = *++pszConfig) != '\0');
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| 284 | if (ch == '\0')
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| 285 | break;
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| 286 |
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| 287 | /*
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| 288 | * Extract the name.
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| 289 | */
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| 290 | const char *pszName = pszConfig;
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| 291 | while ( ch != '\0'
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| 292 | && !RT_C_IS_SPACE(ch)
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| 293 | && !RT_C_IS_PUNCT(ch))
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| 294 | ch = *++pszConfig;
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| 295 | size_t const cchName = pszConfig - pszName;
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| 296 |
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| 297 | /*
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| 298 | * 'all' - special group that enables or disables all trace points.
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| 299 | */
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| 300 | if (cchName == 3 && !strncmp(pszName, "all", 3))
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| 301 | {
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| 302 | if (uPass != 0)
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| 303 | {
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| 304 | uint32_t iCpu = pVM->cCpus;
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| 305 | if (!fNo)
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| 306 | while (iCpu-- > 0)
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[80191] | 307 | pVM->apCpusR3[iCpu]->fTraceGroups = UINT32_MAX;
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[40405] | 308 | else
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| 309 | while (iCpu-- > 0)
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[80191] | 310 | pVM->apCpusR3[iCpu]->fTraceGroups = 0;
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[40405] | 311 | PDMR3TracingConfig(pVM, NULL, 0, !fNo, uPass > 0);
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| 312 | }
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| 313 | }
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| 314 | else
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| 315 | {
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| 316 | /*
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| 317 | * A specific group, try the VMM first then PDM.
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| 318 | */
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| 319 | uint32_t i = RT_ELEMENTS(g_aVmmTpGroups);
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| 320 | while (i-- > 0)
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| 321 | if ( g_aVmmTpGroups[i].cchName == cchName
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| 322 | && !strncmp(g_aVmmTpGroups[i].pszName, pszName, cchName))
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| 323 | {
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| 324 | if (uPass != 0)
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| 325 | {
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| 326 | uint32_t iCpu = pVM->cCpus;
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| 327 | if (!fNo)
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| 328 | while (iCpu-- > 0)
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[80191] | 329 | pVM->apCpusR3[iCpu]->fTraceGroups |= g_aVmmTpGroups[i].fMask;
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[40405] | 330 | else
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| 331 | while (iCpu-- > 0)
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[80191] | 332 | pVM->apCpusR3[iCpu]->fTraceGroups &= ~g_aVmmTpGroups[i].fMask;
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[40405] | 333 | }
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| 334 | break;
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| 335 | }
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| 336 |
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| 337 | if (i == UINT32_MAX)
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| 338 | {
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| 339 | int rc = PDMR3TracingConfig(pVM, pszName, cchName, !fNo, uPass > 0);
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| 340 | if (RT_FAILURE(rc))
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| 341 | return rc;
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| 342 | }
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| 343 | }
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| 344 | }
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| 345 | }
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| 346 |
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| 347 | return VINF_SUCCESS;
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| 348 | }
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| 349 |
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| 350 |
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| 351 | /**
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| 352 | * Query the trace configuration specification string.
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| 353 | *
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| 354 | * @returns VBox status code.
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| 355 | * @retval VINF_SUCCESS
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| 356 | * @retval VERR_INVALID_VM_HANDLE
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| 357 | * @retval VERR_INVALID_POINTER
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| 358 | * @retval VERR_BUFFER_OVERFLOW if the buffer is too small. Buffer will be
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| 359 | * empty.
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| 360 |
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[58122] | 361 | * @param pVM The cross context VM structure.
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[40405] | 362 | * @param pszConfig Pointer to the output buffer.
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| 363 | * @param cbConfig The size of the output buffer.
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| 364 | */
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| 365 | VMMDECL(int) DBGFR3TraceQueryConfig(PVM pVM, char *pszConfig, size_t cbConfig)
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| 366 | {
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| 367 | VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
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| 368 | AssertPtrReturn(pszConfig, VERR_INVALID_POINTER);
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| 369 | if (cbConfig < 1)
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| 370 | return VERR_BUFFER_OVERFLOW;
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| 371 | *pszConfig = '\0';
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| 372 |
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| 373 | if (pVM->hTraceBufR3 == NIL_RTTRACEBUF)
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| 374 | return VERR_DBGF_NO_TRACE_BUFFER;
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| 375 |
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| 376 | int rc = VINF_SUCCESS;
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[80191] | 377 | uint32_t const fTraceGroups = pVM->apCpusR3[0]->fTraceGroups;
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[40405] | 378 | if ( fTraceGroups == UINT32_MAX
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| 379 | && PDMR3TracingAreAll(pVM, true /*fEnabled*/))
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| 380 | rc = RTStrCopy(pszConfig, cbConfig, "all");
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| 381 | else if ( fTraceGroups == 0
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| 382 | && PDMR3TracingAreAll(pVM, false /*fEnabled*/))
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| 383 | rc = RTStrCopy(pszConfig, cbConfig, "-all");
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| 384 | else
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| 385 | {
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| 386 | char *pszDst = pszConfig;
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| 387 | size_t cbDst = cbConfig;
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| 388 | uint32_t i = RT_ELEMENTS(g_aVmmTpGroups);
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| 389 | while (i-- > 0)
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| 390 | if (g_aVmmTpGroups[i].fMask & fTraceGroups)
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| 391 | {
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| 392 | size_t cchThis = g_aVmmTpGroups[i].cchName + (pszDst != pszConfig);
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| 393 | if (cchThis >= cbDst)
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| 394 | {
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| 395 | rc = VERR_BUFFER_OVERFLOW;
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| 396 | break;
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| 397 | }
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| 398 | if (pszDst != pszConfig)
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| 399 | {
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| 400 | *pszDst = ' ';
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| 401 | memcpy(pszDst + 1, g_aVmmTpGroups[i].pszName, g_aVmmTpGroups[i].cchName + 1);
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| 402 | }
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| 403 | else
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| 404 | memcpy(pszDst, g_aVmmTpGroups[i].pszName, g_aVmmTpGroups[i].cchName + 1);
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| 405 | pszDst += cchThis;
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| 406 | cbDst -= cchThis;
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| 407 | }
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| 408 |
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| 409 | if (RT_SUCCESS(rc))
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| 410 | rc = PDMR3TracingQueryConfig(pVM, pszDst, cbDst);
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| 411 | }
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| 412 |
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| 413 | if (RT_FAILURE(rc))
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| 414 | *pszConfig = '\0';
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| 415 | return rc;
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| 416 | }
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| 417 |
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| 418 |
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| 419 | /**
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[37410] | 420 | * @callback_method_impl{FNRTTRACEBUFCALLBACK}
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| 421 | */
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| 422 | static DECLCALLBACK(int)
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| 423 | dbgfR3TraceInfoDumpEntry(RTTRACEBUF hTraceBuf, uint32_t iEntry, uint64_t NanoTS, RTCPUID idCpu, const char *pszMsg, void *pvUser)
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| 424 | {
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| 425 | PCDBGFINFOHLP pHlp = (PCDBGFINFOHLP)pvUser;
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| 426 | pHlp->pfnPrintf(pHlp, "#%04u/%'llu/%02x: %s\n", iEntry, NanoTS, idCpu, pszMsg);
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| 427 | NOREF(hTraceBuf);
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| 428 | return VINF_SUCCESS;
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| 429 | }
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| 430 |
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| 431 |
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| 432 | /**
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| 433 | * @callback_method_impl{FNDBGFHANDLERINT, Info handler for displaying the trace buffer content.}
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| 434 | */
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| 435 | static DECLCALLBACK(void) dbgfR3TraceInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
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| 436 | {
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| 437 | RTTRACEBUF hTraceBuf = pVM->hTraceBufR3;
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| 438 | if (hTraceBuf == NIL_RTTRACEBUF)
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[67724] | 439 | pHlp->pfnPrintf(pHlp, "Tracing is disabled\n");
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[37410] | 440 | else
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| 441 | {
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| 442 | pHlp->pfnPrintf(pHlp, "Trace buffer %p - %u entries of %u bytes\n",
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| 443 | hTraceBuf, RTTraceBufGetEntryCount(hTraceBuf), RTTraceBufGetEntrySize(hTraceBuf));
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| 444 | RTTraceBufEnumEntries(hTraceBuf, dbgfR3TraceInfoDumpEntry, (void *)pHlp);
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| 445 | }
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[39078] | 446 | NOREF(pszArgs);
|
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[37410] | 447 | }
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| 448 |
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