DBGFR3Trace.cpp@ 62748

Last change on this file since 62748 was 62478, checked in by vboxsync, 8 years ago
(C) 2016
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File size: 14.6 KB

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1	/* $Id: DBGFR3Trace.cpp 62478 2016-07-22 18:29:06Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Tracing.
4	*/
5
6	/*
7	* Copyright (C) 2011-2016 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DBGF
23	#include <VBox/vmm/dbgftrace.h>
24	#include <VBox/vmm/cfgm.h>
25	#include <VBox/vmm/mm.h>
26	#include <VBox/vmm/pdmapi.h>
27	#include "DBGFInternal.h"
28	#include <VBox/vmm/vm.h>
29	#include "VMMTracing.h"
30
31	#include <VBox/err.h>
32	#include <VBox/log.h>
33	#include <VBox/param.h>
34
35	#include <iprt/assert.h>
36	#include <iprt/ctype.h>
37	#include <iprt/trace.h>
38
39
40	/*********************************************************************************************************************************
41	* Internal Functions *
42	*********************************************************************************************************************************/
43	static DECLCALLBACK(void) dbgfR3TraceInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
44
45
46	/*********************************************************************************************************************************
47	* Global Variables *
48	*********************************************************************************************************************************/
49	/**
50	* VMM trace point group translation table.
51	*/
52	static const struct
53	{
54	/** The group name. */
55	const char *pszName;
56	/** The name length. */
57	uint32_t cchName;
58	/** The mask. */
59	uint32_t fMask;
60	} g_aVmmTpGroups[] =
61	{
62	{ RT_STR_TUPLE("em"), VMMTPGROUP_EM },
63	{ RT_STR_TUPLE("hm"), VMMTPGROUP_HM },
64	{ RT_STR_TUPLE("tm"), VMMTPGROUP_TM },
65	};
66
67
68	/**
69	* Initializes the tracing.
70	*
71	* @returns VBox status code
72	* @param pVM The cross context VM structure.
73	* @param cbEntry The trace entry size.
74	* @param cEntries The number of entries.
75	*/
76	static int dbgfR3TraceEnable(PVM pVM, uint32_t cbEntry, uint32_t cEntries)
77	{
78	/*
79	* Don't enable it twice.
80	*/
81	if (pVM->hTraceBufR3 != NIL_RTTRACEBUF)
82	return VERR_ALREADY_EXISTS;
83
84	/*
85	* Resolve default parameter values.
86	*/
87	int rc;
88	if (!cbEntry)
89	{
90	rc = CFGMR3QueryU32Def(CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF"), "TraceBufEntrySize", &cbEntry, 128);
91	AssertRCReturn(rc, rc);
92	}
93	if (!cEntries)
94	{
95	rc = CFGMR3QueryU32Def(CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF"), "TraceBufEntries", &cEntries, 4096);
96	AssertRCReturn(rc, rc);
97	}
98
99	/*
100	* Figure the required size.
101	*/
102	RTTRACEBUF hTraceBuf;
103	size_t cbBlock = 0;
104	rc = RTTraceBufCarve(&hTraceBuf, cEntries, cbEntry, 0 /fFlags/, NULL, &cbBlock);
105	if (rc != VERR_BUFFER_OVERFLOW)
106	{
107	AssertReturn(!RT_SUCCESS_NP(rc), VERR_IPE_UNEXPECTED_INFO_STATUS);
108	return rc;
109	}
110
111	/*
112	* Allocate a hyper heap block and carve a trace buffer out of it.
113	*
114	* Note! We ASSUME that the returned trace buffer handle has the same value
115	* as the heap block.
116	*/
117	cbBlock = RT_ALIGN_Z(cbBlock, PAGE_SIZE);
118	void *pvBlock;
119	rc = MMR3HyperAllocOnceNoRel(pVM, cbBlock, PAGE_SIZE, MM_TAG_DBGF, &pvBlock);
120	if (RT_FAILURE(rc))
121	return rc;
122
123	rc = RTTraceBufCarve(&hTraceBuf, cEntries, cbEntry, 0 /fFlags/, pvBlock, &cbBlock);
124	AssertRCReturn(rc, rc);
125	AssertRelease(hTraceBuf == (RTTRACEBUF)pvBlock && (void *)hTraceBuf == pvBlock);
126
127	pVM->hTraceBufR3 = hTraceBuf;
128	pVM->hTraceBufR0 = MMHyperCCToR0(pVM, hTraceBuf);
129	pVM->hTraceBufRC = MMHyperCCToRC(pVM, hTraceBuf);
130	return VINF_SUCCESS;
131	}
132
133
134	/**
135	* Initializes the tracing.
136	*
137	* @returns VBox status code
138	* @param pVM The cross context VM structure.
139	*/
140	int dbgfR3TraceInit(PVM pVM)
141	{
142	/*
143	* Initialize the trace buffer handles.
144	*/
145	Assert(NIL_RTTRACEBUF == (RTTRACEBUF)NULL);
146	pVM->hTraceBufR3 = NIL_RTTRACEBUF;
147	pVM->hTraceBufRC = NIL_RTRCPTR;
148	pVM->hTraceBufR0 = NIL_RTR0PTR;
149
150	/*
151	* Check the config and enable tracing if requested.
152	*/
153	PCFGMNODE pDbgfNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF");
154	#if defined(DEBUG) \|\| defined(RTTRACE_ENABLED)
155	bool const fDefault = false;
156	const char * const pszConfigDefault = "";
157	#else
158	bool const fDefault = false;
159	const char * const pszConfigDefault = "";
160	#endif
161	bool fTracingEnabled;
162	int rc = CFGMR3QueryBoolDef(pDbgfNode, "TracingEnabled", &fTracingEnabled, fDefault);
163	AssertRCReturn(rc, rc);
164	if (fTracingEnabled)
165	{
166	rc = dbgfR3TraceEnable(pVM, 0, 0);
167	if (RT_SUCCESS(rc))
168	{
169	if (pDbgfNode)
170	{
171	char *pszTracingConfig;
172	rc = CFGMR3QueryStringAllocDef(pDbgfNode, "TracingConfig", &pszTracingConfig, pszConfigDefault);
173	if (RT_SUCCESS(rc))
174	{
175	rc = DBGFR3TraceConfig(pVM, pszTracingConfig);
176	if (RT_FAILURE(rc))
177	rc = VMSetError(pVM, rc, RT_SRC_POS, "TracingConfig=\"%s\" -> %Rrc", pszTracingConfig, rc);
178	MMR3HeapFree(pszTracingConfig);
179	}
180	}
181	else
182	{
183	rc = DBGFR3TraceConfig(pVM, pszConfigDefault);
184	if (RT_FAILURE(rc))
185	rc = VMSetError(pVM, rc, RT_SRC_POS, "TracingConfig=\"%s\" (default) -> %Rrc", pszConfigDefault, rc);
186	}
187	}
188	}
189
190	/*
191	* Register a debug info item that will dump the trace buffer content.
192	*/
193	if (RT_SUCCESS(rc))
194	rc = DBGFR3InfoRegisterInternal(pVM, "tracebuf", "Display the trace buffer content. No arguments.", dbgfR3TraceInfo);
195
196	return rc;
197	}
198
199
200	/**
201	* Terminates the tracing.
202	*
203	* @param pVM The cross context VM structure.
204	*/
205	void dbgfR3TraceTerm(PVM pVM)
206	{
207	/* nothing to do */
208	NOREF(pVM);
209	}
210
211
212	/**
213	* Relocates the trace buffer handle in RC.
214	*
215	* @param pVM The cross context VM structure.
216	*/
217	void dbgfR3TraceRelocate(PVM pVM)
218	{
219	if (pVM->hTraceBufR3 != NIL_RTTRACEBUF)
220	pVM->hTraceBufRC = MMHyperCCToRC(pVM, pVM->hTraceBufR3);
221	}
222
223
224	/**
225	* Change the traceing configuration of the VM.
226	*
227	* @returns VBox status code.
228	* @retval VINF_SUCCESS
229	* @retval VERR_NOT_FOUND if any of the trace point groups mentioned in the
230	* config string cannot be found. (Or if the string cannot be made
231	* sense of.) No change made.
232	* @retval VERR_INVALID_VM_HANDLE
233	* @retval VERR_INVALID_POINTER
234	*
235	* @param pVM The cross context VM structure.
236	* @param pszConfig The configuration change specification.
237	*
238	* Trace point group names, optionally prefixed by a '-' to
239	* indicate that the group is being disabled. A special
240	* group 'all' can be used to enable or disable all trace
241	* points.
242	*
243	* Drivers, devices and USB devices each have their own
244	* trace point group which can be accessed by prefixing
245	* their official PDM name by 'drv', 'dev' or 'usb'
246	* respectively.
247	*/
248	VMMDECL(int) DBGFR3TraceConfig(PVM pVM, const char *pszConfig)
249	{
250	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
251	AssertPtrReturn(pszConfig, VERR_INVALID_POINTER);
252	if (pVM->hTraceBufR3 == NIL_RTTRACEBUF)
253	return VERR_DBGF_NO_TRACE_BUFFER;
254
255	/*
256	* We do this in two passes, the first pass just validates the input string
257	* and the second applies the changes.
258	*/
259	for (uint32_t uPass = 0; uPass < 1; uPass++)
260	{
261	char ch;
262	while ((ch = *pszConfig) != '\0')
263	{
264	if (RT_C_IS_SPACE(ch))
265	continue;
266
267	/*
268	* Operation prefix.
269	*/
270	bool fNo = false;
271	do
272	{
273	if (ch == 'n' && pszConfig[1] == 'o')
274	{
275	fNo = !fNo;
276	pszConfig++;
277	}
278	else if (ch == '+')
279	fNo = false;
280	else if (ch == '-' \|\| ch == '!' \|\| ch == '~')
281	fNo = !fNo;
282	else
283	break;
284	} while ((ch = *++pszConfig) != '\0');
285	if (ch == '\0')
286	break;
287
288	/*
289	* Extract the name.
290	*/
291	const char *pszName = pszConfig;
292	while ( ch != '\0'
293	&& !RT_C_IS_SPACE(ch)
294	&& !RT_C_IS_PUNCT(ch))
295	ch = *++pszConfig;
296	size_t const cchName = pszConfig - pszName;
297
298	/*
299	* 'all' - special group that enables or disables all trace points.
300	*/
301	if (cchName == 3 && !strncmp(pszName, "all", 3))
302	{
303	if (uPass != 0)
304	{
305	uint32_t iCpu = pVM->cCpus;
306	if (!fNo)
307	while (iCpu-- > 0)
308	pVM->aCpus[iCpu].fTraceGroups = UINT32_MAX;
309	else
310	while (iCpu-- > 0)
311	pVM->aCpus[iCpu].fTraceGroups = 0;
312	PDMR3TracingConfig(pVM, NULL, 0, !fNo, uPass > 0);
313	}
314	}
315	else
316	{
317	/*
318	* A specific group, try the VMM first then PDM.
319	*/
320	uint32_t i = RT_ELEMENTS(g_aVmmTpGroups);
321	while (i-- > 0)
322	if ( g_aVmmTpGroups[i].cchName == cchName
323	&& !strncmp(g_aVmmTpGroups[i].pszName, pszName, cchName))
324	{
325	if (uPass != 0)
326	{
327	uint32_t iCpu = pVM->cCpus;
328	if (!fNo)
329	while (iCpu-- > 0)
330	pVM->aCpus[iCpu].fTraceGroups \|= g_aVmmTpGroups[i].fMask;
331	else
332	while (iCpu-- > 0)
333	pVM->aCpus[iCpu].fTraceGroups &= ~g_aVmmTpGroups[i].fMask;
334	}
335	break;
336	}
337
338	if (i == UINT32_MAX)
339	{
340	int rc = PDMR3TracingConfig(pVM, pszName, cchName, !fNo, uPass > 0);
341	if (RT_FAILURE(rc))
342	return rc;
343	}
344	}
345	}
346	}
347
348	return VINF_SUCCESS;
349	}
350
351
352	/**
353	* Query the trace configuration specification string.
354	*
355	* @returns VBox status code.
356	* @retval VINF_SUCCESS
357	* @retval VERR_INVALID_VM_HANDLE
358	* @retval VERR_INVALID_POINTER
359	* @retval VERR_BUFFER_OVERFLOW if the buffer is too small. Buffer will be
360	* empty.
361
362	* @param pVM The cross context VM structure.
363	* @param pszConfig Pointer to the output buffer.
364	* @param cbConfig The size of the output buffer.
365	*/
366	VMMDECL(int) DBGFR3TraceQueryConfig(PVM pVM, char *pszConfig, size_t cbConfig)
367	{
368	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
369	AssertPtrReturn(pszConfig, VERR_INVALID_POINTER);
370	if (cbConfig < 1)
371	return VERR_BUFFER_OVERFLOW;
372	*pszConfig = '\0';
373
374	if (pVM->hTraceBufR3 == NIL_RTTRACEBUF)
375	return VERR_DBGF_NO_TRACE_BUFFER;
376
377	int rc = VINF_SUCCESS;
378	uint32_t const fTraceGroups = pVM->aCpus[0].fTraceGroups;
379	if ( fTraceGroups == UINT32_MAX
380	&& PDMR3TracingAreAll(pVM, true /fEnabled/))
381	rc = RTStrCopy(pszConfig, cbConfig, "all");
382	else if ( fTraceGroups == 0
383	&& PDMR3TracingAreAll(pVM, false /fEnabled/))
384	rc = RTStrCopy(pszConfig, cbConfig, "-all");
385	else
386	{
387	char *pszDst = pszConfig;
388	size_t cbDst = cbConfig;
389	uint32_t i = RT_ELEMENTS(g_aVmmTpGroups);
390	while (i-- > 0)
391	if (g_aVmmTpGroups[i].fMask & fTraceGroups)
392	{
393	size_t cchThis = g_aVmmTpGroups[i].cchName + (pszDst != pszConfig);
394	if (cchThis >= cbDst)
395	{
396	rc = VERR_BUFFER_OVERFLOW;
397	break;
398	}
399	if (pszDst != pszConfig)
400	{
401	*pszDst = ' ';
402	memcpy(pszDst + 1, g_aVmmTpGroups[i].pszName, g_aVmmTpGroups[i].cchName + 1);
403	}
404	else
405	memcpy(pszDst, g_aVmmTpGroups[i].pszName, g_aVmmTpGroups[i].cchName + 1);
406	pszDst += cchThis;
407	cbDst -= cchThis;
408	}
409
410	if (RT_SUCCESS(rc))
411	rc = PDMR3TracingQueryConfig(pVM, pszDst, cbDst);
412	}
413
414	if (RT_FAILURE(rc))
415	*pszConfig = '\0';
416	return rc;
417	}
418
419
420	/**
421	* @callback_method_impl{FNRTTRACEBUFCALLBACK}
422	*/
423	static DECLCALLBACK(int)
424	dbgfR3TraceInfoDumpEntry(RTTRACEBUF hTraceBuf, uint32_t iEntry, uint64_t NanoTS, RTCPUID idCpu, const char pszMsg, void pvUser)
425	{
426	PCDBGFINFOHLP pHlp = (PCDBGFINFOHLP)pvUser;
427	pHlp->pfnPrintf(pHlp, "#%04u/%'llu/%02x: %s\n", iEntry, NanoTS, idCpu, pszMsg);
428	NOREF(hTraceBuf);
429	return VINF_SUCCESS;
430	}
431
432
433	/**
434	* @callback_method_impl{FNDBGFHANDLERINT, Info handler for displaying the trace buffer content.}
435	*/
436	static DECLCALLBACK(void) dbgfR3TraceInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
437	{
438	RTTRACEBUF hTraceBuf = pVM->hTraceBufR3;
439	if (hTraceBuf == NIL_RTTRACEBUF)
440	pHlp->pfnPrintf(pHlp, "Tracing is disable\n");
441	else
442	{
443	pHlp->pfnPrintf(pHlp, "Trace buffer %p - %u entries of %u bytes\n",
444	hTraceBuf, RTTraceBufGetEntryCount(hTraceBuf), RTTraceBufGetEntrySize(hTraceBuf));
445	RTTraceBufEnumEntries(hTraceBuf, dbgfR3TraceInfoDumpEntry, (void *)pHlp);
446	}
447	NOREF(pszArgs);
448	}
449

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGFR3Trace.cpp@ 62748

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