DBGFR3Trace.cpp@ 48565

Last change on this file since 48565 was 47238, checked in by vboxsync, 11 years ago
Disable tracing by default even in debug builds. It's only useful when debugging and can then be turned on explicitly.
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File size: 14.0 KB

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1	/* $Id: DBGFR3Trace.cpp 47238 2013-07-18 22:31:09Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Tracing.
4	*/
5
6	/*
7	* Copyright (C) 2011-2012 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 Pointer to the VM.
73	*/
74	static int dbgfR3TraceEnable(PVM pVM, uint32_t cbEntry, uint32_t cEntries)
75	{
76	/*
77	* Don't enable it twice.
78	*/
79	if (pVM->hTraceBufR3 != NIL_RTTRACEBUF)
80	return VERR_ALREADY_EXISTS;
81
82	/*
83	* Resolve default parameter values.
84	*/
85	int rc;
86	if (!cbEntry)
87	{
88	rc = CFGMR3QueryU32Def(CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF"), "TraceBufEntrySize", &cbEntry, 128);
89	AssertRCReturn(rc, rc);
90	}
91	if (!cEntries)
92	{
93	rc = CFGMR3QueryU32Def(CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF"), "TraceBufEntries", &cEntries, 4096);
94	AssertRCReturn(rc, rc);
95	}
96
97	/*
98	* Figure the required size.
99	*/
100	RTTRACEBUF hTraceBuf;
101	size_t cbBlock = 0;
102	rc = RTTraceBufCarve(&hTraceBuf, cEntries, cbEntry, 0 /fFlags/, NULL, &cbBlock);
103	if (rc != VERR_BUFFER_OVERFLOW)
104	{
105	AssertReturn(!RT_SUCCESS_NP(rc), VERR_IPE_UNEXPECTED_INFO_STATUS);
106	return rc;
107	}
108
109	/*
110	* Allocate a hyper heap block and carve a trace buffer out of it.
111	*
112	* Note! We ASSUME that the returned trace buffer handle has the same value
113	* as the heap block.
114	*/
115	cbBlock = RT_ALIGN_Z(cbBlock, PAGE_SIZE);
116	void *pvBlock;
117	rc = MMR3HyperAllocOnceNoRel(pVM, cbBlock, PAGE_SIZE, MM_TAG_DBGF, &pvBlock);
118	if (RT_FAILURE(rc))
119	return rc;
120
121	rc = RTTraceBufCarve(&hTraceBuf, cEntries, cbEntry, 0 /fFlags/, pvBlock, &cbBlock);
122	AssertRCReturn(rc, rc);
123	AssertRelease(hTraceBuf == (RTTRACEBUF)pvBlock && (void *)hTraceBuf == pvBlock);
124
125	pVM->hTraceBufR3 = hTraceBuf;
126	pVM->hTraceBufR0 = MMHyperCCToR0(pVM, hTraceBuf);
127	pVM->hTraceBufRC = MMHyperCCToRC(pVM, hTraceBuf);
128	return VINF_SUCCESS;
129	}
130
131
132	/**
133	* Initializes the tracing.
134	*
135	* @returns VBox status code
136	* @param pVM Pointer to the VM.
137	*/
138	int dbgfR3TraceInit(PVM pVM)
139	{
140	/*
141	* Initialize the trace buffer handles.
142	*/
143	Assert(NIL_RTTRACEBUF == (RTTRACEBUF)NULL);
144	pVM->hTraceBufR3 = NIL_RTTRACEBUF;
145	pVM->hTraceBufRC = NIL_RTRCPTR;
146	pVM->hTraceBufR0 = NIL_RTR0PTR;
147
148	/*
149	* Check the config and enable tracing if requested.
150	*/
151	PCFGMNODE pDbgfNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF");
152	#if defined(DEBUG) \|\| defined(RTTRACE_ENABLED)
153	bool const fDefault = false;
154	const char * const pszConfigDefault = "";
155	#else
156	bool const fDefault = false;
157	const char * const pszConfigDefault = "";
158	#endif
159	bool fTracingEnabled;
160	int rc = CFGMR3QueryBoolDef(pDbgfNode, "TracingEnabled", &fTracingEnabled, fDefault);
161	AssertRCReturn(rc, rc);
162	if (fTracingEnabled)
163	{
164	rc = dbgfR3TraceEnable(pVM, 0, 0);
165	if (RT_SUCCESS(rc))
166	{
167	if (pDbgfNode)
168	{
169	char *pszTracingConfig;
170	rc = CFGMR3QueryStringAllocDef(pDbgfNode, "TracingConfig", &pszTracingConfig, pszConfigDefault);
171	if (RT_SUCCESS(rc))
172	{
173	rc = DBGFR3TraceConfig(pVM, pszTracingConfig);
174	if (RT_FAILURE(rc))
175	rc = VMSetError(pVM, rc, RT_SRC_POS, "TracingConfig=\"%s\" -> %Rrc", pszTracingConfig, rc);
176	MMR3HeapFree(pszTracingConfig);
177	}
178	}
179	else
180	{
181	rc = DBGFR3TraceConfig(pVM, pszConfigDefault);
182	if (RT_FAILURE(rc))
183	rc = VMSetError(pVM, rc, RT_SRC_POS, "TracingConfig=\"%s\" (default) -> %Rrc", pszConfigDefault, rc);
184	}
185	}
186	}
187
188	/*
189	* Register a debug info item that will dump the trace buffer content.
190	*/
191	if (RT_SUCCESS(rc))
192	rc = DBGFR3InfoRegisterInternal(pVM, "tracebuf", "Display the trace buffer content. No arguments.", dbgfR3TraceInfo);
193
194	return rc;
195	}
196
197
198	/**
199	* Terminates the tracing.
200	*
201	* @param pVM Pointer to the VM.
202	*/
203	void dbgfR3TraceTerm(PVM pVM)
204	{
205	/* nothing to do */
206	NOREF(pVM);
207	}
208
209
210	/**
211	* Relocates the trace buffer handle in RC.
212	*
213	* @param pVM Pointer to the VM.
214	*/
215	void dbgfR3TraceRelocate(PVM pVM)
216	{
217	if (pVM->hTraceBufR3 != NIL_RTTRACEBUF)
218	pVM->hTraceBufRC = MMHyperCCToRC(pVM, pVM->hTraceBufR3);
219	}
220
221
222	/**
223	* Change the traceing configuration of the VM.
224	*
225	* @returns VBox status code.
226	* @retval VINF_SUCCESS
227	* @retval VERR_NOT_FOUND if any of the trace point groups mentioned in the
228	* config string cannot be found. (Or if the string cannot be made
229	* sense of.) No change made.
230	* @retval VERR_INVALID_VM_HANDLE
231	* @retval VERR_INVALID_POINTER
232	*
233	* @param pVM Pointer to the VM.
234	* @param pszConfig The configuration change specification.
235	*
236	* Trace point group names, optionally prefixed by a '-' to
237	* indicate that the group is being disabled. A special
238	* group 'all' can be used to enable or disable all trace
239	* points.
240	*
241	* Drivers, devices and USB devices each have their own
242	* trace point group which can be accessed by prefixing
243	* their official PDM name by 'drv', 'dev' or 'usb'
244	* respectively.
245	*/
246	VMMDECL(int) DBGFR3TraceConfig(PVM pVM, const char *pszConfig)
247	{
248	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
249	AssertPtrReturn(pszConfig, VERR_INVALID_POINTER);
250	if (pVM->hTraceBufR3 == NIL_RTTRACEBUF)
251	return VERR_DBGF_NO_TRACE_BUFFER;
252
253	/*
254	* We do this in two passes, the first pass just validates the input string
255	* and the second applies the changes.
256	*/
257	for (uint32_t uPass = 0; uPass < 1; uPass++)
258	{
259	char ch;
260	while ((ch = *pszConfig) != '\0')
261	{
262	if (RT_C_IS_SPACE(ch))
263	continue;
264
265	/*
266	* Operation prefix.
267	*/
268	bool fNo = false;
269	do
270	{
271	if (ch == 'n' && pszConfig[1] == 'o')
272	{
273	fNo = !fNo;
274	pszConfig++;
275	}
276	else if (ch == '+')
277	fNo = false;
278	else if (ch == '-' \|\| ch == '!' \|\| ch == '~')
279	fNo = !fNo;
280	else
281	break;
282	} while ((ch = *++pszConfig) != '\0');
283	if (ch == '\0')
284	break;
285
286	/*
287	* Extract the name.
288	*/
289	const char *pszName = pszConfig;
290	while ( ch != '\0'
291	&& !RT_C_IS_SPACE(ch)
292	&& !RT_C_IS_PUNCT(ch))
293	ch = *++pszConfig;
294	size_t const cchName = pszConfig - pszName;
295
296	/*
297	* 'all' - special group that enables or disables all trace points.
298	*/
299	if (cchName == 3 && !strncmp(pszName, "all", 3))
300	{
301	if (uPass != 0)
302	{
303	uint32_t iCpu = pVM->cCpus;
304	if (!fNo)
305	while (iCpu-- > 0)
306	pVM->aCpus[iCpu].fTraceGroups = UINT32_MAX;
307	else
308	while (iCpu-- > 0)
309	pVM->aCpus[iCpu].fTraceGroups = 0;
310	PDMR3TracingConfig(pVM, NULL, 0, !fNo, uPass > 0);
311	}
312	}
313	else
314	{
315	/*
316	* A specific group, try the VMM first then PDM.
317	*/
318	uint32_t i = RT_ELEMENTS(g_aVmmTpGroups);
319	while (i-- > 0)
320	if ( g_aVmmTpGroups[i].cchName == cchName
321	&& !strncmp(g_aVmmTpGroups[i].pszName, pszName, cchName))
322	{
323	if (uPass != 0)
324	{
325	uint32_t iCpu = pVM->cCpus;
326	if (!fNo)
327	while (iCpu-- > 0)
328	pVM->aCpus[iCpu].fTraceGroups \|= g_aVmmTpGroups[i].fMask;
329	else
330	while (iCpu-- > 0)
331	pVM->aCpus[iCpu].fTraceGroups &= ~g_aVmmTpGroups[i].fMask;
332	}
333	break;
334	}
335
336	if (i == UINT32_MAX)
337	{
338	int rc = PDMR3TracingConfig(pVM, pszName, cchName, !fNo, uPass > 0);
339	if (RT_FAILURE(rc))
340	return rc;
341	}
342	}
343	}
344	}
345
346	return VINF_SUCCESS;
347	}
348
349
350	/**
351	* Query the trace configuration specification string.
352	*
353	* @returns VBox status code.
354	* @retval VINF_SUCCESS
355	* @retval VERR_INVALID_VM_HANDLE
356	* @retval VERR_INVALID_POINTER
357	* @retval VERR_BUFFER_OVERFLOW if the buffer is too small. Buffer will be
358	* empty.
359
360	* @param pVM Pointer to the VM.
361	* @param pszConfig Pointer to the output buffer.
362	* @param cbConfig The size of the output buffer.
363	*/
364	VMMDECL(int) DBGFR3TraceQueryConfig(PVM pVM, char *pszConfig, size_t cbConfig)
365	{
366	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
367	AssertPtrReturn(pszConfig, VERR_INVALID_POINTER);
368	if (cbConfig < 1)
369	return VERR_BUFFER_OVERFLOW;
370	*pszConfig = '\0';
371
372	if (pVM->hTraceBufR3 == NIL_RTTRACEBUF)
373	return VERR_DBGF_NO_TRACE_BUFFER;
374
375	int rc = VINF_SUCCESS;
376	uint32_t const fTraceGroups = pVM->aCpus[0].fTraceGroups;
377	if ( fTraceGroups == UINT32_MAX
378	&& PDMR3TracingAreAll(pVM, true /fEnabled/))
379	rc = RTStrCopy(pszConfig, cbConfig, "all");
380	else if ( fTraceGroups == 0
381	&& PDMR3TracingAreAll(pVM, false /fEnabled/))
382	rc = RTStrCopy(pszConfig, cbConfig, "-all");
383	else
384	{
385	char *pszDst = pszConfig;
386	size_t cbDst = cbConfig;
387	uint32_t i = RT_ELEMENTS(g_aVmmTpGroups);
388	while (i-- > 0)
389	if (g_aVmmTpGroups[i].fMask & fTraceGroups)
390	{
391	size_t cchThis = g_aVmmTpGroups[i].cchName + (pszDst != pszConfig);
392	if (cchThis >= cbDst)
393	{
394	rc = VERR_BUFFER_OVERFLOW;
395	break;
396	}
397	if (pszDst != pszConfig)
398	{
399	*pszDst = ' ';
400	memcpy(pszDst + 1, g_aVmmTpGroups[i].pszName, g_aVmmTpGroups[i].cchName + 1);
401	}
402	else
403	memcpy(pszDst, g_aVmmTpGroups[i].pszName, g_aVmmTpGroups[i].cchName + 1);
404	pszDst += cchThis;
405	cbDst -= cchThis;
406	}
407
408	if (RT_SUCCESS(rc))
409	rc = PDMR3TracingQueryConfig(pVM, pszDst, cbDst);
410	}
411
412	if (RT_FAILURE(rc))
413	*pszConfig = '\0';
414	return rc;
415	}
416
417
418	/**
419	* @callback_method_impl{FNRTTRACEBUFCALLBACK}
420	*/
421	static DECLCALLBACK(int)
422	dbgfR3TraceInfoDumpEntry(RTTRACEBUF hTraceBuf, uint32_t iEntry, uint64_t NanoTS, RTCPUID idCpu, const char pszMsg, void pvUser)
423	{
424	PCDBGFINFOHLP pHlp = (PCDBGFINFOHLP)pvUser;
425	pHlp->pfnPrintf(pHlp, "#%04u/%'llu/%02x: %s\n", iEntry, NanoTS, idCpu, pszMsg);
426	NOREF(hTraceBuf);
427	return VINF_SUCCESS;
428	}
429
430
431	/**
432	* @callback_method_impl{FNDBGFHANDLERINT, Info handler for displaying the trace buffer content.}
433	*/
434	static DECLCALLBACK(void) dbgfR3TraceInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
435	{
436	RTTRACEBUF hTraceBuf = pVM->hTraceBufR3;
437	if (hTraceBuf == NIL_RTTRACEBUF)
438	pHlp->pfnPrintf(pHlp, "Tracing is disable\n");
439	else
440	{
441	pHlp->pfnPrintf(pHlp, "Trace buffer %p - %u entries of %u bytes\n",
442	hTraceBuf, RTTraceBufGetEntryCount(hTraceBuf), RTTraceBufGetEntrySize(hTraceBuf));
443	RTTraceBufEnumEntries(hTraceBuf, dbgfR3TraceInfoDumpEntry, (void *)pHlp);
444	}
445	NOREF(pszArgs);
446	}
447

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGFR3Trace.cpp@ 48565

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