VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMR3/DBGFR3Tracer.cpp@ 97169

Last change on this file since 97169 was 96407, checked in by vboxsync, 2 years ago

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1/* $Id: DBGFR3Tracer.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
2/** @file
3 * DBGF - Debugger Facility, tracing parts.
4 */
5
6/*
7 * Copyright (C) 2020-2022 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * SPDX-License-Identifier: GPL-3.0-only
26 */
27
28
29/*********************************************************************************************************************************
30* Header Files *
31*********************************************************************************************************************************/
32#define LOG_GROUP LOG_GROUP_DBGF
33#include "DBGFInternal.h"
34#include <VBox/vmm/pdm.h>
35#include <VBox/vmm/cfgm.h>
36#include <VBox/vmm/uvm.h>
37#include <VBox/vmm/vm.h>
38#include <VBox/vmm/vmm.h>
39#include <VBox/sup.h>
40
41#include <VBox/version.h>
42#include <VBox/log.h>
43#include <VBox/err.h>
44#include <iprt/buildconfig.h>
45#include <iprt/alloc.h>
46#include <iprt/alloca.h>
47#include <iprt/asm.h>
48#include <iprt/assert.h>
49#include <iprt/path.h>
50#include <iprt/semaphore.h>
51#include <iprt/string.h>
52#include <iprt/thread.h>
53#include <iprt/tracelog.h>
54
55
56/*********************************************************************************************************************************
57* Structures and Typedefs *
58*********************************************************************************************************************************/
59
60
61
62/*********************************************************************************************************************************
63* Global Variables *
64*********************************************************************************************************************************/
65/** The event descriptors written to the trace log. */
66
67static const RTTRACELOGEVTDESC g_EvtSrcRegisterEvtDesc =
68{
69 "EvtSrc.Register",
70 "An event source was registered",
71 RTTRACELOGEVTSEVERITY_DEBUG,
72 0,
73 NULL
74};
75
76
77static const RTTRACELOGEVTDESC g_EvtSrcDeregisterEvtDesc =
78{
79 "EvtSrc.Deregister",
80 "An event source was de-registered",
81 RTTRACELOGEVTSEVERITY_DEBUG,
82 0,
83 NULL
84};
85
86
87static const RTTRACELOGEVTITEMDESC g_DevMmioCreateEvtItems[] =
88{
89 {"hMmioRegion", "The MMIO region handle being returned by IOM", RTTRACELOGTYPE_UINT64, 0},
90 {"cbRegion", "Size of the MMIO region in bytes", RTTRACELOGTYPE_UINT64, 0},
91 {"fIomFlags", "Flags passed to IOM", RTTRACELOGTYPE_UINT32, 0},
92 {"iPciRegion", "PCI region used for a PCI device", RTTRACELOGTYPE_UINT32, 0},
93};
94
95static const RTTRACELOGEVTDESC g_DevMmioCreateEvtDesc =
96{
97 "Dev.MmioCreate",
98 "MMIO region of a device is being created",
99 RTTRACELOGEVTSEVERITY_DEBUG,
100 RT_ELEMENTS(g_DevMmioCreateEvtItems),
101 &g_DevMmioCreateEvtItems[0]
102};
103
104
105static const RTTRACELOGEVTITEMDESC g_DevMmioMapEvtItems[] =
106{
107 {"hMmioRegion", "The MMIO region handle being mapped", RTTRACELOGTYPE_UINT64, 0},
108 {"GCPhysMmioBase", "The guest physical address where the region is mapped", RTTRACELOGTYPE_UINT64, 0}
109};
110
111static const RTTRACELOGEVTDESC g_DevMmioMapEvtDesc =
112{
113 "Dev.MmioMap",
114 "MMIO region of a device is being mapped",
115 RTTRACELOGEVTSEVERITY_DEBUG,
116 RT_ELEMENTS(g_DevMmioMapEvtItems),
117 &g_DevMmioMapEvtItems[0]
118};
119
120
121static const RTTRACELOGEVTITEMDESC g_DevMmioUnmapEvtItems[] =
122{
123 {"hMmioRegion", "The MMIO region handle being unmapped", RTTRACELOGTYPE_UINT64, 0}
124};
125
126static const RTTRACELOGEVTDESC g_DevMmioUnmapEvtDesc =
127{
128 "Dev.MmioUnmap",
129 "MMIO region of a device is being unmapped",
130 RTTRACELOGEVTSEVERITY_DEBUG,
131 RT_ELEMENTS(g_DevMmioUnmapEvtItems),
132 &g_DevMmioUnmapEvtItems[0]
133};
134
135
136static const RTTRACELOGEVTITEMDESC g_DevMmioRwEvtItems[] =
137{
138 {"hMmioRegion", "The MMIO region handle being accessed", RTTRACELOGTYPE_UINT64, 0},
139 {"offMmio", "The offset in the MMIO region being accessed", RTTRACELOGTYPE_UINT64, 0},
140 {"cbXfer", "Number of bytes being transfered", RTTRACELOGTYPE_UINT64, 0},
141 {"u64Val", "The value read or written", RTTRACELOGTYPE_UINT64, 0},
142};
143
144static const RTTRACELOGEVTDESC g_DevMmioReadEvtDesc =
145{
146 "Dev.MmioRead",
147 "MMIO region of a device is being read",
148 RTTRACELOGEVTSEVERITY_DEBUG,
149 RT_ELEMENTS(g_DevMmioRwEvtItems),
150 &g_DevMmioRwEvtItems[0]
151};
152
153static const RTTRACELOGEVTDESC g_DevMmioWriteEvtDesc =
154{
155 "Dev.MmioWrite",
156 "MMIO region of a device is being written",
157 RTTRACELOGEVTSEVERITY_DEBUG,
158 RT_ELEMENTS(g_DevMmioRwEvtItems),
159 &g_DevMmioRwEvtItems[0]
160};
161
162
163static const RTTRACELOGEVTITEMDESC g_DevMmioFillEvtItems[] =
164{
165 {"hMmioRegion", "The MMIO region handle being unmapped", RTTRACELOGTYPE_UINT64, 0},
166 {"offMmio", "The offset in the MMIO region being accessed", RTTRACELOGTYPE_UINT64, 0},
167 {"cbItem", "Item size in bytes", RTTRACELOGTYPE_UINT32, 0},
168 {"cItems", "Number of items being written", RTTRACELOGTYPE_UINT32, 0},
169 {"u32Val", "The value used for filling", RTTRACELOGTYPE_UINT32, 0},
170};
171
172static const RTTRACELOGEVTDESC g_DevMmioFillEvtDesc =
173{
174 "Dev.MmioFill",
175 "MMIO region of a device is being filled",
176 RTTRACELOGEVTSEVERITY_DEBUG,
177 RT_ELEMENTS(g_DevMmioFillEvtItems),
178 &g_DevMmioFillEvtItems[0]
179};
180
181
182static const RTTRACELOGEVTITEMDESC g_DevIoPortCreateEvtItems[] =
183{
184 {"hIoPorts", "The I/O port region handle being returned by IOM", RTTRACELOGTYPE_UINT64, 0},
185 {"cPorts", "Size of the region in number of ports", RTTRACELOGTYPE_UINT16, 0},
186 {"fIomFlags", "Flags passed to IOM", RTTRACELOGTYPE_UINT32, 0},
187 {"iPciRegion", "PCI region used for a PCI device", RTTRACELOGTYPE_UINT32, 0},
188};
189
190static const RTTRACELOGEVTDESC g_DevIoPortCreateEvtDesc =
191{
192 "Dev.IoPortCreate",
193 "I/O port region of a device is being created",
194 RTTRACELOGEVTSEVERITY_DEBUG,
195 RT_ELEMENTS(g_DevIoPortCreateEvtItems),
196 &g_DevIoPortCreateEvtItems[0]
197};
198
199
200static const RTTRACELOGEVTITEMDESC g_DevIoPortMapEvtItems[] =
201{
202 {"hIoPorts", "The I/O port region handle being mapped", RTTRACELOGTYPE_UINT64, 0},
203 {"IoPortBase", "The I/O port base address where the region is mapped", RTTRACELOGTYPE_UINT16, 0}
204};
205
206static const RTTRACELOGEVTDESC g_DevIoPortMapEvtDesc =
207{
208 "Dev.IoPortMap",
209 "I/O port region of a device is being mapped",
210 RTTRACELOGEVTSEVERITY_DEBUG,
211 RT_ELEMENTS(g_DevIoPortMapEvtItems),
212 &g_DevIoPortMapEvtItems[0]
213};
214
215
216static const RTTRACELOGEVTITEMDESC g_DevIoPortUnmapEvtItems[] =
217{
218 {"hIoPorts", "The I/O port region handle being unmapped", RTTRACELOGTYPE_UINT64, 0}
219};
220
221static const RTTRACELOGEVTDESC g_DevIoPortUnmapEvtDesc =
222{
223 "Dev.IoPortUnmap",
224 "I/O port region of a device is being unmapped",
225 RTTRACELOGEVTSEVERITY_DEBUG,
226 RT_ELEMENTS(g_DevIoPortUnmapEvtItems),
227 &g_DevIoPortUnmapEvtItems[0]
228};
229
230
231static const RTTRACELOGEVTITEMDESC g_DevIoPortRwEvtItems[] =
232{
233 {"hIoPorts", "The I/O region handle being accessed", RTTRACELOGTYPE_UINT64, 0},
234 {"offPort", "The offset in the I/O port region being accessed", RTTRACELOGTYPE_UINT16, 0},
235 {"cbXfer", "Number of bytes being transfered", RTTRACELOGTYPE_UINT64, 0},
236 {"u32Val", "The value read or written", RTTRACELOGTYPE_UINT32, 0},
237};
238
239static const RTTRACELOGEVTDESC g_DevIoPortReadEvtDesc =
240{
241 "Dev.IoPortRead",
242 "I/O port region of a device is being read",
243 RTTRACELOGEVTSEVERITY_DEBUG,
244 RT_ELEMENTS(g_DevIoPortRwEvtItems),
245 &g_DevIoPortRwEvtItems[0]
246};
247
248static const RTTRACELOGEVTDESC g_DevIoPortWriteEvtDesc =
249{
250 "Dev.IoPortWrite",
251 "I/O port region of a device is being written",
252 RTTRACELOGEVTSEVERITY_DEBUG,
253 RT_ELEMENTS(g_DevIoPortRwEvtItems),
254 &g_DevIoPortRwEvtItems[0]
255};
256
257
258static const RTTRACELOGEVTITEMDESC g_DevIoPortRwStrEvtItems[] =
259{
260 {"hIoPorts", "The I/O region handle being accesses", RTTRACELOGTYPE_UINT64, 0},
261 {"offPort", "The offset in the I/O port region being accessed", RTTRACELOGTYPE_UINT16, 0},
262 {"cbItem", "Item size for the access", RTTRACELOGTYPE_UINT32, 0},
263 {"cTransfersReq", "Number of transfers requested by the guest", RTTRACELOGTYPE_UINT32, 0},
264 {"cTransfersRet", "Number of transfers executed by the device", RTTRACELOGTYPE_UINT32, 0}
265};
266
267static const RTTRACELOGEVTDESC g_DevIoPortReadStrEvtDesc =
268{
269 "Dev.IoPortReadStr",
270 "I/O port region of a device is being read using REP INS",
271 RTTRACELOGEVTSEVERITY_DEBUG,
272 RT_ELEMENTS(g_DevIoPortRwStrEvtItems),
273 &g_DevIoPortRwStrEvtItems[0]
274};
275
276static const RTTRACELOGEVTDESC g_DevIoPortWriteStrEvtDesc =
277{
278 "Dev.IoPortWriteStr",
279 "I/O port region of a device is being written using REP OUTS",
280 RTTRACELOGEVTSEVERITY_DEBUG,
281 RT_ELEMENTS(g_DevIoPortRwStrEvtItems),
282 &g_DevIoPortRwStrEvtItems[0]
283};
284
285
286static const RTTRACELOGEVTITEMDESC g_DevIrqEvtItems[] =
287{
288 {"iIrq", "The IRQ line", RTTRACELOGTYPE_INT32, 0},
289 {"fIrqLvl", "The IRQ level", RTTRACELOGTYPE_INT32, 0}
290};
291
292static const RTTRACELOGEVTDESC g_DevIrqEvtDesc =
293{
294 "Dev.Irq",
295 "Device raised or lowered an IRQ line",
296 RTTRACELOGEVTSEVERITY_DEBUG,
297 RT_ELEMENTS(g_DevIrqEvtItems),
298 &g_DevIrqEvtItems[0]
299};
300
301
302static const RTTRACELOGEVTITEMDESC g_DevIoApicMsiEvtItems[] =
303{
304 {"GCPhys", "Physical guest address being written", RTTRACELOGTYPE_UINT64, 0},
305 {"u32Val", "value being written", RTTRACELOGTYPE_UINT32, 0}
306};
307
308static const RTTRACELOGEVTDESC g_DevIoApicMsiEvtDesc =
309{
310 "Dev.IoApicMsi",
311 "Device sent a MSI event through the I/O APIC",
312 RTTRACELOGEVTSEVERITY_DEBUG,
313 RT_ELEMENTS(g_DevIoApicMsiEvtItems),
314 &g_DevIoApicMsiEvtItems[0]
315};
316
317
318static const RTTRACELOGEVTITEMDESC g_DevGCPhysRwStartEvtItems[] =
319{
320 {"GCPhys", "Physical guest address being accessed", RTTRACELOGTYPE_UINT64, 0},
321 {"cbXfer", "Number of bytes being transfered", RTTRACELOGTYPE_UINT64, 0},
322};
323
324
325static const RTTRACELOGEVTDESC g_DevGCPhysReadEvtDesc =
326{
327 "Dev.GCPhysRead",
328 "Device read data from guest physical memory",
329 RTTRACELOGEVTSEVERITY_DEBUG,
330 RT_ELEMENTS(g_DevGCPhysRwStartEvtItems),
331 &g_DevGCPhysRwStartEvtItems[0]
332};
333
334
335static const RTTRACELOGEVTDESC g_DevGCPhysWriteEvtDesc =
336{
337 "Dev.GCPhysWrite",
338 "Device wrote data to guest physical memory",
339 RTTRACELOGEVTSEVERITY_DEBUG,
340 RT_ELEMENTS(g_DevGCPhysRwStartEvtItems),
341 &g_DevGCPhysRwStartEvtItems[0]
342};
343
344
345static const RTTRACELOGEVTITEMDESC g_DevRwDataEvtItems[] =
346{
347 {"abData", "The data being read/written", RTTRACELOGTYPE_RAWDATA, 0}
348};
349
350static const RTTRACELOGEVTDESC g_DevRwDataEvtDesc =
351{
352 "Dev.RwData",
353 "The data being read or written",
354 RTTRACELOGEVTSEVERITY_DEBUG,
355 RT_ELEMENTS(g_DevRwDataEvtItems),
356 &g_DevRwDataEvtItems[0]
357};
358
359
360/*********************************************************************************************************************************
361* Internal Functions *
362*********************************************************************************************************************************/
363
364
365/**
366 * Returns an unused guest memory read/write data aggregation structure.
367 *
368 * @returns Pointer to a new aggregation structure or NULL if out of memory.
369 * @param pThis The DBGF tracer instance.
370 */
371static PDBGFTRACERGCPHYSRWAGG dbgfTracerR3EvtRwAggNew(PDBGFTRACERINSR3 pThis)
372{
373 for (uint32_t i = 0; i < RT_ELEMENTS(pThis->aGstMemRwData); i++)
374 {
375 if (pThis->aGstMemRwData[i].idEvtStart == DBGF_TRACER_EVT_HDR_ID_INVALID)
376 return &pThis->aGstMemRwData[i];
377 }
378
379 return NULL;
380}
381
382
383/**
384 * Find the guest memory read/write data aggregation structure for the given event ID.
385 *
386 * @returns Pointer to a new aggregation structure or NULL if not found.
387 * @param pThis The DBGF tracer instance.
388 * @param idEvtPrev The event ID to look for.
389 */
390static PDBGFTRACERGCPHYSRWAGG dbgfTracerR3EvtRwAggFind(PDBGFTRACERINSR3 pThis, uint64_t idEvtPrev)
391{
392 for (uint32_t i = 0; i < RT_ELEMENTS(pThis->aGstMemRwData); i++)
393 {
394 if ( pThis->aGstMemRwData[i].idEvtStart != DBGF_TRACER_EVT_HDR_ID_INVALID
395 && pThis->aGstMemRwData[i].idEvtPrev == idEvtPrev)
396 return &pThis->aGstMemRwData[i];
397 }
398
399 return NULL;
400}
401
402
403/**
404 * Common code for the guest memory and string I/O port read/write events.
405 *
406 * @returns VBox status code.
407 * @param pThis The DBGF tracer instance.
408 * @param pEvtHdr The event header.
409 * @param cbXfer Overall number of bytes of data for this event.
410 * @param pvData Initial data supplied in the event starting the aggregation.
411 * @param cbData Number of initial bytes of data.
412 */
413static int dbgfTracerR3EvtRwStartCommon(PDBGFTRACERINSR3 pThis, PCDBGFTRACEREVTHDR pEvtHdr, size_t cbXfer, const void *pvData, size_t cbData)
414{
415 /* Slow path, find an empty aggregation structure. */
416 int rc = VINF_SUCCESS;
417 PDBGFTRACERGCPHYSRWAGG pDataAgg = dbgfTracerR3EvtRwAggNew(pThis);
418 if (RT_LIKELY(pDataAgg))
419 {
420 /* Initialize it. */
421 pDataAgg->idEvtStart = pEvtHdr->idEvt;
422 pDataAgg->idEvtPrev = pEvtHdr->idEvt;
423 pDataAgg->cbXfer = cbXfer;
424 pDataAgg->cbLeft = pDataAgg->cbXfer;
425 pDataAgg->offBuf = 0;
426
427 /* Need to reallocate the buffer to hold the complete data? */
428 if (RT_UNLIKELY(pDataAgg->cbBufMax < pDataAgg->cbXfer))
429 {
430 uint8_t *pbBufNew = (uint8_t *)RTMemRealloc(pDataAgg->pbBuf, pDataAgg->cbXfer);
431 if (RT_LIKELY(pbBufNew))
432 {
433 pDataAgg->pbBuf = pbBufNew;
434 pDataAgg->cbBufMax = pDataAgg->cbXfer;
435 }
436 else
437 rc = VERR_NO_MEMORY;
438 }
439
440 if (RT_SUCCESS(rc))
441 {
442 memcpy(pDataAgg->pbBuf, pvData, cbData);
443 pDataAgg->offBuf += cbData;
444 pDataAgg->cbLeft -= cbData;
445 }
446 }
447 else
448 rc = VERR_NO_MEMORY;
449
450 if (RT_FAILURE(rc))
451 {
452 LogRelMax(10, ("DBGF: Creating new data aggregation structure for memory read/write failed with %Rrc, trace log will not contain data for this event!\n", rc));
453
454 /* Write out the finish event without any data. */
455 size_t cbEvtData = 0;
456 rc = RTTraceLogWrEvtAdd(pThis->hTraceLog, &g_DevRwDataEvtDesc, RTTRACELOG_WR_ADD_EVT_F_GRP_FINISH,
457 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, NULL, &cbEvtData);
458 if (pDataAgg) /* Reset the aggregation event. */
459 pDataAgg->idEvtStart = DBGF_TRACER_EVT_HDR_ID_INVALID;
460 }
461
462 return rc;
463}
464
465
466/**
467 * Starts a new guest memory read/write event.
468 *
469 * @returns VBox status code.
470 * @param pThis The DBGF tracer instance.
471 * @param pEvtHdr The event header.
472 * @param pEvtGCPhysRw The guest memory read/write event descriptor.
473 * @param pEvtDesc The event descriptor written to the trace log.
474 */
475static int dbgfTracerR3EvtGCPhysRwStart(PDBGFTRACERINSR3 pThis, PCDBGFTRACEREVTHDR pEvtHdr,
476 PCDBGFTRACEREVTGCPHYS pEvtGCPhysRw, PCRTTRACELOGEVTDESC pEvtDesc)
477{
478 /* Write out the event header first in any case. */
479 int rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, pEvtDesc, RTTRACELOG_WR_ADD_EVT_F_GRP_START,
480 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtGCPhysRw->GCPhys, pEvtGCPhysRw->cbXfer);
481 if (RT_SUCCESS(rc))
482 {
483 /*
484 * If the amount of data is small enough to fit into the single event descriptor we can skip allocating
485 * an aggregation tracking structure and write the event containing the complete data out immediately.
486 */
487 if (pEvtGCPhysRw->cbXfer <= sizeof(pEvtGCPhysRw->abData))
488 {
489 size_t cbEvtData = pEvtGCPhysRw->cbXfer;
490
491 rc = RTTraceLogWrEvtAdd(pThis->hTraceLog, &g_DevRwDataEvtDesc, RTTRACELOG_WR_ADD_EVT_F_GRP_FINISH,
492 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, &pEvtGCPhysRw->abData[0], &cbEvtData);
493 }
494 else
495 rc = dbgfTracerR3EvtRwStartCommon(pThis, pEvtHdr, pEvtGCPhysRw->cbXfer, &pEvtGCPhysRw->abData[0], sizeof(pEvtGCPhysRw->abData));
496 }
497
498 return rc;
499}
500
501
502/**
503 * Starts a new I/O port string read/write event.
504 *
505 * @returns VBox status code.
506 * @param pThis The DBGF tracer instance.
507 * @param pEvtHdr The event header.
508 * @param pEvtIoPortStrRw The I/O port string read/write event descriptor.
509 * @param cbXfer Number of bytes of valid data for this event.
510 * @param pEvtDesc The event descriptor written to the trace log.
511 */
512static int dbgfTracerR3EvtIoPortStrRwStart(PDBGFTRACERINSR3 pThis, PCDBGFTRACEREVTHDR pEvtHdr,
513 PCDBGFTRACEREVTIOPORTSTR pEvtIoPortStrRw, size_t cbXfer,
514 PCRTTRACELOGEVTDESC pEvtDesc)
515{
516 /* Write out the event header first in any case. */
517 int rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, pEvtDesc, RTTRACELOG_WR_ADD_EVT_F_GRP_START,
518 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtIoPortStrRw->hIoPorts, pEvtIoPortStrRw->offPort,
519 pEvtIoPortStrRw->cbItem, pEvtIoPortStrRw->cTransfersReq, pEvtIoPortStrRw->cTransfersRet);
520 if (RT_SUCCESS(rc))
521 {
522 /*
523 * If the amount of data is small enough to fit into the single event descriptor we can skip allocating
524 * an aggregation tracking structure and write the event containing the complete data out immediately.
525 */
526 if (cbXfer <= sizeof(pEvtIoPortStrRw->abData))
527 {
528 size_t cbEvtData = cbXfer;
529
530 rc = RTTraceLogWrEvtAdd(pThis->hTraceLog, &g_DevRwDataEvtDesc, RTTRACELOG_WR_ADD_EVT_F_GRP_FINISH,
531 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, &pEvtIoPortStrRw->abData[0], &cbEvtData);
532 }
533 else
534 rc = dbgfTracerR3EvtRwStartCommon(pThis, pEvtHdr, cbXfer, &pEvtIoPortStrRw->abData[0], sizeof(pEvtIoPortStrRw->abData));
535 }
536
537 return rc;
538}
539
540
541/**
542 * Continues a previously started guest memory or string I/O port read/write event.
543 *
544 * @returns VBox status code.
545 * @param pThis The DBGF tracer instance.
546 * @param pEvtHdr The event header.
547 * @param pvData The data to log.
548 */
549static int dbgfTracerR3EvtRwContinue(PDBGFTRACERINSR3 pThis, PCDBGFTRACEREVTHDR pEvtHdr, void *pvData)
550{
551 int rc = VINF_SUCCESS;
552 PDBGFTRACERGCPHYSRWAGG pDataAgg = dbgfTracerR3EvtRwAggFind(pThis, pEvtHdr->idEvtPrev);
553
554 if (RT_LIKELY(pDataAgg))
555 {
556 size_t cbThisXfer = RT_MIN(pDataAgg->cbLeft, DBGF_TRACER_EVT_PAYLOAD_SZ);
557
558 memcpy(pDataAgg->pbBuf + pDataAgg->offBuf, pvData, cbThisXfer);
559 pDataAgg->offBuf += cbThisXfer;
560 pDataAgg->cbLeft -= cbThisXfer;
561
562 if (!pDataAgg->cbLeft)
563 {
564 /* All data aggregated, write it out and reset the structure. */
565 rc = RTTraceLogWrEvtAdd(pThis->hTraceLog, &g_DevRwDataEvtDesc, RTTRACELOG_WR_ADD_EVT_F_GRP_FINISH,
566 pDataAgg->idEvtStart, pEvtHdr->hEvtSrc, pDataAgg->pbBuf, &pDataAgg->cbXfer);
567 pDataAgg->offBuf = 0;
568 pDataAgg->idEvtStart = DBGF_TRACER_EVT_HDR_ID_INVALID;
569 }
570 else
571 pDataAgg->idEvtPrev = pEvtHdr->idEvt; /* So the next event containing more data can find the aggregation structure. */
572 }
573 else /* This can only happen if creating a new structure failed before. */
574 rc = VERR_DBGF_TRACER_IPE_1;
575
576 return rc;
577}
578
579
580/**
581 * Processes the given event.
582 *
583 * @returns VBox status code.
584 * @param pThis The DBGF tracer instance.
585 * @param pEvtHdr The event to process.
586 */
587static int dbgfR3TracerEvtProcess(PDBGFTRACERINSR3 pThis, PDBGFTRACEREVTHDR pEvtHdr)
588{
589 int rc = VINF_SUCCESS;
590
591 LogFlowFunc(("pThis=%p pEvtHdr=%p{idEvt=%llu,enmEvt=%u}\n",
592 pThis, pEvtHdr, pEvtHdr->idEvt, pEvtHdr->enmEvt));
593
594 switch (pEvtHdr->enmEvt)
595 {
596 case DBGFTRACEREVT_SRC_REGISTER:
597 {
598 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_EvtSrcRegisterEvtDesc, RTTRACELOG_WR_ADD_EVT_F_GRP_START,
599 pEvtHdr->hEvtSrc, 0 /*uParentGrpId*/);
600 break;
601 }
602 case DBGFTRACEREVT_SRC_DEREGISTER:
603 {
604 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_EvtSrcDeregisterEvtDesc, RTTRACELOG_WR_ADD_EVT_F_GRP_FINISH,
605 pEvtHdr->hEvtSrc, 0 /*uParentGrpId*/);
606 break;
607 }
608 case DBGFTRACEREVT_MMIO_REGION_CREATE:
609 {
610 PCDBGFTRACEREVTMMIOCREATE pEvtMmioCreate = (PCDBGFTRACEREVTMMIOCREATE)(pEvtHdr + 1);
611
612 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_DevMmioCreateEvtDesc, 0 /*fFlags*/,
613 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtMmioCreate->hMmioRegion, pEvtMmioCreate->cbRegion,
614 pEvtMmioCreate->fIomFlags, pEvtMmioCreate->iPciRegion);
615 break;
616 }
617 case DBGFTRACEREVT_MMIO_MAP:
618 {
619 PCDBGFTRACEREVTMMIOMAP pEvtMmioMap = (PCDBGFTRACEREVTMMIOMAP)(pEvtHdr + 1);
620
621 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_DevMmioMapEvtDesc, 0 /*fFlags*/,
622 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtMmioMap->hMmioRegion, pEvtMmioMap->GCPhysMmioBase);
623 break;
624 }
625 case DBGFTRACEREVT_MMIO_UNMAP:
626 {
627 PCDBGFTRACEREVTMMIOUNMAP pEvtMmioUnmap = (PCDBGFTRACEREVTMMIOUNMAP)(pEvtHdr + 1);
628
629 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_DevMmioUnmapEvtDesc, 0 /*fFlags*/,
630 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtMmioUnmap->hMmioRegion);
631 break;
632 }
633 case DBGFTRACEREVT_MMIO_READ:
634 case DBGFTRACEREVT_MMIO_WRITE:
635 {
636 PCDBGFTRACEREVTMMIO pEvtMmioRw = (PCDBGFTRACEREVTMMIO)(pEvtHdr + 1);
637
638 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog,
639 pEvtHdr->enmEvt == DBGFTRACEREVT_MMIO_READ
640 ? &g_DevMmioReadEvtDesc
641 : &g_DevMmioWriteEvtDesc,
642 0 /*fFlags*/,
643 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtMmioRw->hMmioRegion, pEvtMmioRw->offMmio,
644 pEvtMmioRw->cbXfer, pEvtMmioRw->u64Val);
645 break;
646 }
647 case DBGFTRACEREVT_MMIO_FILL:
648 {
649 PCDBGFTRACEREVTMMIOFILL pEvtMmioFill = (PCDBGFTRACEREVTMMIOFILL)(pEvtHdr + 1);
650
651 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_DevMmioFillEvtDesc, 0 /*fFlags*/,
652 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtMmioFill->hMmioRegion, pEvtMmioFill->offMmio,
653 pEvtMmioFill->cbItem, pEvtMmioFill->cItems, pEvtMmioFill->u32Item);
654 break;
655 }
656 case DBGFTRACEREVT_IOPORT_REGION_CREATE:
657 {
658 PCDBGFTRACEREVTIOPORTCREATE pEvtIoPortCreate = (PCDBGFTRACEREVTIOPORTCREATE)(pEvtHdr + 1);
659
660 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_DevIoPortCreateEvtDesc, 0 /*fFlags*/,
661 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtIoPortCreate->hIoPorts, pEvtIoPortCreate->cPorts,
662 pEvtIoPortCreate->fIomFlags, pEvtIoPortCreate->iPciRegion);
663 break;
664 }
665 case DBGFTRACEREVT_IOPORT_MAP:
666 {
667 PCDBGFTRACEREVTIOPORTMAP pEvtIoPortMap = (PCDBGFTRACEREVTIOPORTMAP)(pEvtHdr + 1);
668
669 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_DevIoPortMapEvtDesc, 0 /*fFlags*/,
670 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtIoPortMap->hIoPorts, pEvtIoPortMap->IoPortBase);
671 break;
672 }
673 case DBGFTRACEREVT_IOPORT_UNMAP:
674 {
675 PCDBGFTRACEREVTIOPORTUNMAP pEvtIoPortUnmap = (PCDBGFTRACEREVTIOPORTUNMAP)(pEvtHdr + 1);
676
677 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_DevIoPortUnmapEvtDesc, 0 /*fFlags*/,
678 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtIoPortUnmap->hIoPorts);
679 break;
680 }
681 case DBGFTRACEREVT_IOPORT_READ:
682 case DBGFTRACEREVT_IOPORT_WRITE:
683 {
684 PCDBGFTRACEREVTIOPORT pEvtIoPortRw = (PCDBGFTRACEREVTIOPORT)(pEvtHdr + 1);
685
686 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog,
687 pEvtHdr->enmEvt == DBGFTRACEREVT_IOPORT_READ
688 ? &g_DevIoPortReadEvtDesc
689 : &g_DevIoPortWriteEvtDesc,
690 0 /*fFlags*/,
691 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtIoPortRw->hIoPorts, pEvtIoPortRw->offPort,
692 pEvtIoPortRw->cbXfer, pEvtIoPortRw->u32Val);
693 break;
694 }
695 case DBGFTRACEREVT_IOPORT_READ_STR:
696 case DBGFTRACEREVT_IOPORT_WRITE_STR:
697 {
698 PCRTTRACELOGEVTDESC pEvtDesc = pEvtHdr->enmEvt == DBGFTRACEREVT_IOPORT_WRITE_STR
699 ? &g_DevIoPortWriteStrEvtDesc
700 : &g_DevIoPortReadStrEvtDesc;
701
702 /* If the previous event ID is invalid this starts a new read/write we have to aggregate all the data for. */
703 if (pEvtHdr->idEvtPrev == DBGF_TRACER_EVT_HDR_ID_INVALID)
704 {
705 PCDBGFTRACEREVTIOPORTSTR pEvtIoPortStrRw = (PCDBGFTRACEREVTIOPORTSTR)(pEvtHdr + 1);
706 size_t cbXfer = pEvtHdr->enmEvt == DBGFTRACEREVT_IOPORT_WRITE_STR
707 ? pEvtIoPortStrRw->cTransfersReq * pEvtIoPortStrRw->cbItem
708 : pEvtIoPortStrRw->cTransfersRet * pEvtIoPortStrRw->cbItem;
709
710 rc = dbgfTracerR3EvtIoPortStrRwStart(pThis, pEvtHdr, pEvtIoPortStrRw, cbXfer, pEvtDesc);
711 }
712 else
713 {
714 /* Continuation of a started read or write, look up the right tracking structure and process the new data. */
715 void *pvData = pEvtHdr + 1;
716 rc = dbgfTracerR3EvtRwContinue(pThis, pEvtHdr, pvData);
717 }
718 break;
719 }
720 case DBGFTRACEREVT_IRQ:
721 {
722 PCDBGFTRACEREVTIRQ pEvtIrq = (PCDBGFTRACEREVTIRQ)(pEvtHdr + 1);
723
724 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_DevIrqEvtDesc, 0 /*fFlags*/,
725 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtIrq->iIrq, pEvtIrq->fIrqLvl);
726 break;
727 }
728 case DBGFTRACEREVT_IOAPIC_MSI:
729 {
730 PCDBGFTRACEREVTIOAPICMSI pEvtIoApicMsi = (PCDBGFTRACEREVTIOAPICMSI)(pEvtHdr + 1);
731
732 rc = RTTraceLogWrEvtAddL(pThis->hTraceLog, &g_DevIrqEvtDesc, 0 /*fFlags*/,
733 pEvtHdr->idEvt, pEvtHdr->hEvtSrc, pEvtIoApicMsi->GCPhys, pEvtIoApicMsi->u32Val);
734 break;
735 }
736 case DBGFTRACEREVT_GCPHYS_READ:
737 case DBGFTRACEREVT_GCPHYS_WRITE:
738 {
739 PCRTTRACELOGEVTDESC pEvtDesc = pEvtHdr->enmEvt == DBGFTRACEREVT_GCPHYS_WRITE
740 ? &g_DevGCPhysWriteEvtDesc
741 : &g_DevGCPhysReadEvtDesc;
742
743 /* If the previous event ID is invalid this starts a new read/write we have to aggregate all the data for. */
744 if (pEvtHdr->idEvtPrev == DBGF_TRACER_EVT_HDR_ID_INVALID)
745 {
746 PCDBGFTRACEREVTGCPHYS pEvtGCPhysRw = (PCDBGFTRACEREVTGCPHYS)(pEvtHdr + 1);
747 rc = dbgfTracerR3EvtGCPhysRwStart(pThis, pEvtHdr, pEvtGCPhysRw, pEvtDesc);
748 }
749 else
750 {
751 /* Continuation of a started read or write, look up the right tracking structure and process the new data. */
752 void *pvData = pEvtHdr + 1;
753 rc = dbgfTracerR3EvtRwContinue(pThis, pEvtHdr, pvData);
754 }
755 break;
756 }
757 default:
758 AssertLogRelMsgFailed(("Invalid or unsupported event: %u!\n", pEvtHdr->enmEvt));
759 break;
760 }
761
762 return rc;
763}
764
765
766/**
767 * @callback_method_impl{FNRTTHREAD,
768 * DBGF Tracer flush thread}
769 */
770static DECLCALLBACK(int) dbgfR3TracerThreadFlush(RTTHREAD ThreadSelf, void *pvUser)
771{
772 PDBGFTRACERINSR3 pThis = (PDBGFTRACERINSR3)pvUser;
773 PDBGFTRACERSHARED pShared = pThis->pSharedR3;
774 PSUPDRVSESSION pSession = pThis->pVMR3->pSession;
775
776 /* Release the waiter. */
777 RTThreadUserSignal(ThreadSelf);
778
779 /*
780 * Process stuff until we're told to terminate.
781 */
782 for (;;)
783 {
784 ASMAtomicXchgBool(&pShared->fFlushThrdActive, false);
785 if (!ASMAtomicXchgBool(&pShared->fEvtsWaiting, false))
786 {
787 int rc = SUPSemEventWaitNoResume(pSession, pShared->hSupSemEvtFlush, RT_INDEFINITE_WAIT);
788 Assert(RT_SUCCESS(rc) || rc == VERR_INTERRUPTED); RT_NOREF(rc);
789
790 if (RT_UNLIKELY(ASMAtomicReadBool(&pThis->fShutdown)))
791 break;
792 }
793
794 ASMAtomicXchgBool(&pShared->fFlushThrdActive, true);
795
796 uint64_t idEvtNow = ASMAtomicReadU64(&pShared->idEvt);
797 uint64_t idEvt = pThis->idEvtLast;
798 size_t cRingBufEvts = pShared->cbRingBuf / DBGF_TRACER_EVT_SZ;
799 while (idEvt < idEvtNow)
800 {
801 uint64_t idxRingBuf = idEvt % cRingBufEvts; /* This gives the index in the ring buffer for the event. */
802 PDBGFTRACEREVTHDR pEvtHdr = (PDBGFTRACEREVTHDR)(pThis->CTX_SUFF(pbRingBuf) + idxRingBuf * DBGF_TRACER_EVT_SZ);
803
804 /*
805 * If the event header contains the invalid ID the producer was interrupted or didn't get that far yet, spin a bit
806 * and wait for the ID to become valid.
807 */
808 while (ASMAtomicReadU64(&pEvtHdr->idEvt) == DBGF_TRACER_EVT_HDR_ID_INVALID)
809 RTThreadYield();
810
811 int rc = dbgfR3TracerEvtProcess(pThis, pEvtHdr);
812 if (RT_FAILURE(rc))
813 LogRelMax(10, ("DBGF: Writing event failed with %Rrc, tracing log will be incomplete!\n", rc));
814
815 ASMAtomicWriteU64(&pEvtHdr->idEvt, DBGF_TRACER_EVT_HDR_ID_INVALID);
816 idEvt++;
817 }
818
819 pThis->idEvtLast = idEvt;
820 ASMAtomicXchgBool(&pShared->fEvtsWaiting, false);
821 }
822
823 return VINF_SUCCESS;
824}
825
826
827/**
828 * Registers a possible event descriptors with the created trace log for faster subsequent operations.
829 *
830 * @returns VBox status code.
831 * @param pThis The DBGF tracer instance.
832 */
833static int dbgfR3TracerTraceLogEvtDescRegister(PDBGFTRACERINSR3 pThis)
834{
835 int rc = RTTraceLogWrAddEvtDesc(pThis->hTraceLog, &g_DevMmioMapEvtDesc);
836 if (RT_SUCCESS(rc))
837 rc = RTTraceLogWrAddEvtDesc(pThis->hTraceLog, &g_DevMmioUnmapEvtDesc);
838 if (RT_SUCCESS(rc))
839 rc = RTTraceLogWrAddEvtDesc(pThis->hTraceLog, &g_DevMmioReadEvtDesc);
840 if (RT_SUCCESS(rc))
841 rc = RTTraceLogWrAddEvtDesc(pThis->hTraceLog, &g_DevMmioWriteEvtDesc);
842 if (RT_SUCCESS(rc))
843 rc = RTTraceLogWrAddEvtDesc(pThis->hTraceLog, &g_DevIoPortMapEvtDesc);
844 if (RT_SUCCESS(rc))
845 rc = RTTraceLogWrAddEvtDesc(pThis->hTraceLog, &g_DevIoPortUnmapEvtDesc);
846 if (RT_SUCCESS(rc))
847 rc = RTTraceLogWrAddEvtDesc(pThis->hTraceLog, &g_DevIoPortReadEvtDesc);
848 if (RT_SUCCESS(rc))
849 rc = RTTraceLogWrAddEvtDesc(pThis->hTraceLog, &g_DevIoPortWriteEvtDesc);
850 if (RT_SUCCESS(rc))
851 rc = RTTraceLogWrAddEvtDesc(pThis->hTraceLog, &g_DevIrqEvtDesc);
852 if (RT_SUCCESS(rc))
853 rc = RTTraceLogWrAddEvtDesc(pThis->hTraceLog, &g_DevIoApicMsiEvtDesc);
854
855 return rc;
856}
857
858
859/**
860 * Initializes the R3 and shared tarcer instance data and spins up the flush thread.
861 *
862 * @returns VBox status code.
863 * @param pThis The DBGF tracer instance.
864 * @param pszTraceFilePath The path of the trace file to create.
865 */
866static int dbgfR3TracerInitR3(PDBGFTRACERINSR3 pThis, const char *pszTraceFilePath)
867{
868 PVM pVM = pThis->pVMR3;
869 PDBGFTRACERSHARED pShared = pThis->pSharedR3;
870
871 pThis->fShutdown = false;
872
873 for (uint32_t i = 0; i < RT_ELEMENTS(pThis->aGstMemRwData); i++)
874 pThis->aGstMemRwData[i].idEvtStart = DBGF_TRACER_EVT_HDR_ID_INVALID;
875
876 /* Try to create a file based trace log. */
877 int rc = RTTraceLogWrCreateFile(&pThis->hTraceLog, RTBldCfgVersion(), pszTraceFilePath);
878 AssertLogRelRCReturn(rc, rc);
879
880 rc = dbgfR3TracerTraceLogEvtDescRegister(pThis);
881 AssertLogRelRCReturn(rc, rc);
882
883 /*
884 * Go through the whole ring buffer and initialize the event IDs of all entries
885 * to invalid values.
886 */
887 uint64_t cEvtEntries = pShared->cbRingBuf / DBGF_TRACER_EVT_SZ;
888 PDBGFTRACEREVTHDR pEvtHdr = (PDBGFTRACEREVTHDR)pThis->pbRingBufR3;
889 for (uint32_t i = 0; i < cEvtEntries; i++)
890 {
891 pEvtHdr->idEvt = DBGF_TRACER_EVT_HDR_ID_INVALID;
892 pEvtHdr++;
893 }
894
895 rc = SUPSemEventCreate(pVM->pSession, &pShared->hSupSemEvtFlush);
896 if (RT_SUCCESS(rc))
897 {
898 rc = RTThreadCreate(&pThis->hThrdFlush, dbgfR3TracerThreadFlush, pThis, 0 /*cbStack*/, RTTHREADTYPE_IO,
899 RTTHREADFLAGS_WAITABLE, "DBGFTracer");
900 if (RT_SUCCESS(rc))
901 {
902 rc = RTThreadUserWait(pThis->hThrdFlush, 10 * 1000);
903 if (RT_SUCCESS(rc))
904 {
905 return VINF_SUCCESS;
906 }
907 }
908
909 SUPSemEventClose(pVM->pSession, pShared->hSupSemEvtFlush);
910 }
911
912 return rc;
913}
914
915
916/**
917 * Creates a DBGF tracer based on the given config and returns it.
918 *
919 * @returns VBox status code.
920 * @param pVM The cross context VM structure.
921 * @param fR0Enabled Flag whether the tracer should have R0 support enabled.
922 * @param pszTraceFilePath The path of the trace file to create.
923 * @param cbRingBuf Size of the ring buffer in bytes.
924 * @param ppDbgfTracerR3 Where to store the pointer to the tracer on success.
925 */
926DECLHIDDEN(int) dbgfR3TracerCreate(PVM pVM, bool fR0Enabled, const char *pszTraceFilePath,
927 uint32_t cbRingBuf, PDBGFTRACERINSR3 *ppDbgfTracerR3)
928{
929 PDBGFTRACERINSR3 pThis = NULL;
930
931 /*
932 * Allocate the tracer instance.
933 */
934 if ((fR0Enabled /*|| fRCEnabled*/) && !SUPR3IsDriverless())
935 {
936 AssertLogRel(fR0Enabled /* not possible to just enabled raw-mode atm. */);
937
938 DBGFTRACERCREATEREQ Req;
939 Req.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
940 Req.Hdr.cbReq = sizeof(Req);
941 Req.pTracerInsR3 = NULL;
942 Req.cbRingBuf = cbRingBuf;
943 Req.fRCEnabled = false; /*fRCEnabled;*/
944 Req.afReserved[0] = false;
945 Req.afReserved[1] = false;
946 Req.afReserved[2] = false;
947 int rc = VMMR3CallR0Emt(pVM, pVM->apCpusR3[0], VMMR0_DO_DBGF_TRACER_CREATE, 0, &Req.Hdr);
948 AssertLogRelMsgRCReturn(rc, ("VMMR0_DO_DBGF_TRACER_CREATE failed: %Rrc\n", rc), rc);
949 pThis = Req.pTracerInsR3;
950 }
951 else
952 {
953 /* The code in this else branch works by the same rules as the DBGFR0Tracer.cpp
954 code, except there is only the ring-3 components of the tracer instance.
955 Changes here may need to be reflected in DBGFR0Tracer.cpp and vice versa! */
956 uint32_t cb = sizeof(DBGFTRACERINSR3);
957 cb = RT_ALIGN_32(cb, 64);
958 const uint32_t offShared = cb;
959 cb += sizeof(DBGFTRACERSHARED) + cbRingBuf;
960 AssertLogRelMsgReturn(cb <= DBGF_MAX_TRACER_INSTANCE_SIZE_R3,
961 ("Tracer total instance size is to big: %u, max %u\n",
962 cb, DBGF_MAX_TRACER_INSTANCE_SIZE_R3),
963 VERR_ALLOCATION_TOO_BIG);
964
965 int rc = MMR3HeapAllocZEx(pVM, MM_TAG_DBGF_TRACER, cb, (void **)&pThis);
966 AssertLogRelMsgRCReturn(rc, ("Failed to allocate %zu bytes of instance data for tracer. rc=%Rrc\n",
967 cb, rc), rc);
968
969 /* Initialize it: */
970 pThis->pNextR3 = NULL;
971 pThis->pVMR3 = pVM;
972 pThis->fR0Enabled = false;
973 pThis->pSharedR3 = (PDBGFTRACERSHARED)((uint8_t *)pThis + offShared);
974 pThis->pbRingBufR3 = (uint8_t *)(pThis->pSharedR3 + 1);
975
976 pThis->pSharedR3->idEvt = 0;
977 pThis->pSharedR3->cbRingBuf = cbRingBuf;
978 pThis->pSharedR3->fEvtsWaiting = false;
979 pThis->pSharedR3->fFlushThrdActive = false;
980 }
981
982 /* Initialize the rest of the R3 tracer instance and spin up the flush thread. */
983 int rc = dbgfR3TracerInitR3(pThis, pszTraceFilePath);
984 if (RT_SUCCESS(rc))
985 {
986 *ppDbgfTracerR3 = pThis;
987 return rc;
988 }
989
990 /** @todo Cleanup. */
991 LogFlow(("dbgfR3TracerCreate: returns %Rrc\n", rc));
992 return rc;
993}
994
995
996/**
997 * Initializes and configures the tracer if configured.
998 *
999 * @returns VBox status code.
1000 * @param pVM The cross context VM pointer.
1001 */
1002DECLHIDDEN(int) dbgfR3TracerInit(PVM pVM)
1003{
1004 PUVM pUVM = pVM->pUVM;
1005
1006 pUVM->dbgf.s.pTracerR3 = NULL;
1007
1008 /*
1009 * Check the config and enable tracing if requested.
1010 */
1011 PCFGMNODE pDbgfNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF");
1012 bool fTracerEnabled;
1013 int rc = CFGMR3QueryBoolDef(pDbgfNode, "TracerEnabled", &fTracerEnabled, false);
1014 AssertRCReturn(rc, rc);
1015 if (fTracerEnabled)
1016 {
1017 bool fR0Enabled;
1018 uint32_t cbRingBuf = 0;
1019 char *pszTraceFilePath = NULL;
1020 rc = CFGMR3QueryBoolDef(pDbgfNode, "TracerR0Enabled", &fR0Enabled, false);
1021 if (RT_SUCCESS(rc))
1022 rc = CFGMR3QueryU32Def(pDbgfNode, "TracerRingBufSz", &cbRingBuf, _4M);
1023 if (RT_SUCCESS(rc))
1024 rc = CFGMR3QueryStringAlloc(pDbgfNode, "TracerFilePath", &pszTraceFilePath);
1025 if (RT_SUCCESS(rc))
1026 {
1027 AssertLogRelMsgReturn(cbRingBuf && cbRingBuf == (size_t)cbRingBuf,
1028 ("Tracing ringbuffer size %#RX64 is invalid\n", cbRingBuf),
1029 VERR_INVALID_PARAMETER);
1030
1031 rc = dbgfR3TracerCreate(pVM, fR0Enabled, pszTraceFilePath, cbRingBuf, &pUVM->dbgf.s.pTracerR3);
1032 }
1033
1034 if (pszTraceFilePath)
1035 {
1036 MMR3HeapFree(pszTraceFilePath);
1037 pszTraceFilePath = NULL;
1038 }
1039 }
1040
1041 return rc;
1042}
1043
1044
1045/**
1046 * Terminates any configured tracer for the given VM instance.
1047 *
1048 * @returns nothing.
1049 * @param pVM The cross context VM structure.
1050 */
1051DECLHIDDEN(void) dbgfR3TracerTerm(PVM pVM)
1052{
1053 PUVM pUVM = pVM->pUVM;
1054
1055 if (pUVM->dbgf.s.pTracerR3)
1056 {
1057 PDBGFTRACERINSR3 pThis = pUVM->dbgf.s.pTracerR3;
1058 PDBGFTRACERSHARED pSharedR3 = pThis->CTX_SUFF(pShared);
1059
1060 /* Tear down the flush thread. */
1061 ASMAtomicXchgBool(&pThis->fShutdown, true);
1062 SUPSemEventSignal(pVM->pSession, pSharedR3->hSupSemEvtFlush);
1063
1064 int rc = RTThreadWait(pThis->hThrdFlush, RT_MS_30SEC, NULL);
1065 AssertLogRelMsgRC(rc, ("DBGF: Waiting for the tracer flush thread to terminate failed with %Rrc\n", rc));
1066
1067 /* Close the trace log. */
1068 rc = RTTraceLogWrDestroy(pThis->hTraceLog);
1069 AssertLogRelMsgRC(rc, ("DBGF: Closing the trace log file failed with %Rrc\n", rc));
1070
1071 SUPSemEventClose(pVM->pSession, pSharedR3->hSupSemEvtFlush);
1072 /* The instance memory is freed by MM or when the R0 component terminates. */
1073 pUVM->dbgf.s.pTracerR3 = NULL;
1074 }
1075}
1076
1077
1078/**
1079 * Registers a new event source with the given name and returns a tracer event source handle.
1080 *
1081 * @returns VBox status code.
1082 * @param pVM The cross context VM structure.
1083 * @param pszName The event source name.
1084 * @param phEvtSrc Where to return the handle to the event source on success.
1085 */
1086VMMR3_INT_DECL(int) DBGFR3TracerRegisterEvtSrc(PVM pVM, const char *pszName, PDBGFTRACEREVTSRC phEvtSrc)
1087{
1088 VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
1089 AssertReturn(pszName && *pszName != '\0', VERR_INVALID_PARAMETER);
1090 AssertPtrReturn(phEvtSrc, VERR_INVALID_POINTER);
1091
1092 PUVM pUVM = pVM->pUVM;
1093 PDBGFTRACERINSR3 pThis = pUVM->dbgf.s.pTracerR3;
1094
1095 DBGFTRACEREVTSRC hEvtSrc = ASMAtomicIncU64((volatile uint64_t *)&pThis->hEvtSrcNext) - 1;
1096
1097 int rc = dbgfTracerR3EvtPostSingle(pVM, pThis, hEvtSrc, DBGFTRACEREVT_SRC_REGISTER,
1098 NULL /*pvEvtDesc*/, 0 /*cbEvtDesc*/, NULL /*pidEvt*/);
1099 if (RT_SUCCESS(rc))
1100 *phEvtSrc = hEvtSrc;
1101
1102 return rc;
1103}
1104
1105
1106/**
1107 * Deregisters the given event source handle.
1108 *
1109 * @returns VBox status code.
1110 * @param pVM The cross context VM structure.
1111 * @param hEvtSrc The event source handle to deregister.
1112 */
1113VMMR3_INT_DECL(int) DBGFR3TracerDeregisterEvtSrc(PVM pVM, DBGFTRACEREVTSRC hEvtSrc)
1114{
1115 VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
1116 AssertReturn(hEvtSrc != NIL_DBGFTRACEREVTSRC, VERR_INVALID_HANDLE);
1117
1118 PUVM pUVM = pVM->pUVM;
1119 PDBGFTRACERINSR3 pThis = pUVM->dbgf.s.pTracerR3;
1120 return dbgfTracerR3EvtPostSingle(pVM, pThis, hEvtSrc, DBGFTRACEREVT_SRC_DEREGISTER,
1121 NULL /*pvEvtDesc*/, 0 /*cbEvtDesc*/, NULL /*pidEvt*/);
1122}
1123
1124
1125/**
1126 * Registers an I/O port region create event for the given event source.
1127 *
1128 * @returns VBox status code.
1129 * @param pVM The current context VM instance data.
1130 * @param hEvtSrc The event source for the posted event.
1131 * @param hRegion The I/O port region handle returned from IOM.
1132 * @param cPorts Number of ports registered.
1133 * @param fFlags Flags passed to IOM.
1134 * @param iPciRegion For a PCI device the region index used for the I/O ports.
1135 */
1136VMMR3_INT_DECL(int) DBGFR3TracerEvtIoPortCreate(PVM pVM, DBGFTRACEREVTSRC hEvtSrc, uint64_t hRegion, RTIOPORT cPorts, uint32_t fFlags,
1137 uint32_t iPciRegion)
1138{
1139 VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
1140 AssertReturn(hEvtSrc != NIL_DBGFTRACEREVTSRC, VERR_INVALID_HANDLE);
1141
1142 PUVM pUVM = pVM->pUVM;
1143 PDBGFTRACERINSR3 pThis = pUVM->dbgf.s.pTracerR3;
1144
1145 DBGFTRACEREVTIOPORTCREATE EvtIoPortCreate;
1146 RT_ZERO(EvtIoPortCreate);
1147 EvtIoPortCreate.hIoPorts = hRegion;
1148 EvtIoPortCreate.cPorts = cPorts;
1149 EvtIoPortCreate.fIomFlags = fFlags;
1150 EvtIoPortCreate.iPciRegion = iPciRegion;
1151 return dbgfTracerR3EvtPostSingle(pVM, pThis, hEvtSrc, DBGFTRACEREVT_IOPORT_REGION_CREATE,
1152 &EvtIoPortCreate, sizeof(EvtIoPortCreate), NULL /*pidEvt*/);
1153}
1154
1155
1156/**
1157 * Registers an MMIO region create event for the given event source.
1158 *
1159 * @returns VBox status code.
1160 * @param pVM The current context VM instance data.
1161 * @param hEvtSrc The event source for the posted event.
1162 * @param hRegion The MMIO region handle returned from IOM.
1163 * @param cbRegion Size of the MMIO region in bytes.
1164 * @param fFlags Flags passed to IOM.
1165 * @param iPciRegion For a PCI device the region index used for the MMIO region.
1166 */
1167VMMR3_INT_DECL(int) DBGFR3TracerEvtMmioCreate(PVM pVM, DBGFTRACEREVTSRC hEvtSrc, uint64_t hRegion, RTGCPHYS cbRegion, uint32_t fFlags,
1168 uint32_t iPciRegion)
1169{
1170 VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
1171 AssertReturn(hEvtSrc != NIL_DBGFTRACEREVTSRC, VERR_INVALID_HANDLE);
1172
1173 PUVM pUVM = pVM->pUVM;
1174 PDBGFTRACERINSR3 pThis = pUVM->dbgf.s.pTracerR3;
1175
1176 DBGFTRACEREVTMMIOCREATE EvtMmioCreate;
1177 RT_ZERO(EvtMmioCreate);
1178 EvtMmioCreate.hMmioRegion = hRegion;
1179 EvtMmioCreate.cbRegion = cbRegion;
1180 EvtMmioCreate.fIomFlags = fFlags;
1181 EvtMmioCreate.iPciRegion = iPciRegion;
1182 return dbgfTracerR3EvtPostSingle(pVM, pThis, hEvtSrc, DBGFTRACEREVT_MMIO_REGION_CREATE,
1183 &EvtMmioCreate, sizeof(EvtMmioCreate), NULL /*pidEvt*/);
1184}
1185
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