tracebuf.cpp@ 98103

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1	/* $Id: tracebuf.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2	/** @file
3	* IPRT - Tracebuffer common functions.
4	*/
5
6	/*
7	* Copyright (C) 2011-2023 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	* The contents of this file may alternatively be used under the terms
26	* of the Common Development and Distribution License Version 1.0
27	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28	* in the VirtualBox distribution, in which case the provisions of the
29	* CDDL are applicable instead of those of the GPL.
30	*
31	* You may elect to license modified versions of this file under the
32	* terms and conditions of either the GPL or the CDDL or both.
33	*
34	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35	*/
36
37
38	/*********************************************************************************************************************************
39	* Header Files *
40	*********************************************************************************************************************************/
41	#include "internal/iprt.h"
42	#include <iprt/trace.h>
43
44
45	#include <iprt/assert.h>
46	#include <iprt/asm.h>
47	#include <iprt/errcore.h>
48	#include <iprt/log.h>
49	#ifndef IN_RC
50	# include <iprt/mem.h>
51	#endif
52	#include <iprt/mp.h>
53	#if defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_X86)
54	# include <iprt/asm-amd64-x86.h>
55	#endif
56	#include <iprt/path.h>
57	#include <iprt/string.h>
58	#include <iprt/time.h>
59
60	#include "internal/magics.h"
61
62
63	/*********************************************************************************************************************************
64	* Structures and Typedefs *
65	*********************************************************************************************************************************/
66	/** Alignment used to place the trace buffer members, this should be a multiple
67	* of the cache line size if possible. (We should dynamically determine it.) */
68	#define RTTRACEBUF_ALIGNMENT 64
69	AssertCompile(RTTRACEBUF_ALIGNMENT >= sizeof(uint64_t) * 2);
70
71	/** The maximum number of entries. */
72	#define RTTRACEBUF_MAX_ENTRIES _64K
73	/** The minimum number of entries. */
74	#define RTTRACEBUF_MIN_ENTRIES 4
75	/** The default number of entries. */
76	#define RTTRACEBUF_DEF_ENTRIES 256
77
78	/** The maximum entry size. */
79	#define RTTRACEBUF_MAX_ENTRY_SIZE _1M
80	/** The minimum entry size. */
81	#define RTTRACEBUF_MIN_ENTRY_SIZE RTTRACEBUF_ALIGNMENT
82	/** The default entry size. */
83	#define RTTRACEBUF_DEF_ENTRY_SIZE 256
84	AssertCompile(!(RTTRACEBUF_DEF_ENTRY_SIZE & (RTTRACEBUF_DEF_ENTRY_SIZE - 1)));
85
86	/**
87	* The volatile trace buffer members.
88	*/
89	typedef struct RTTRACEBUFVOLATILE
90	{
91	/** Reference counter. */
92	uint32_t volatile cRefs;
93	/** The next entry to make use of. */
94	uint32_t volatile iEntry;
95	} RTTRACEBUFVOLATILE;
96	/** Pointer to the volatile parts of a trace buffer. */
97	typedef RTTRACEBUFVOLATILE *PRTTRACEBUFVOLATILE;
98
99
100	/**
101	* Trace buffer entry.
102	*/
103	typedef struct RTTRACEBUFENTRY
104	{
105	/** The nano second entry time stamp. */
106	uint64_t NanoTS;
107	/** The ID of the CPU the event was recorded. */
108	RTCPUID idCpu;
109	/** The message. */
110	char szMsg[RTTRACEBUF_ALIGNMENT - sizeof(uint64_t) - sizeof(RTCPUID)];
111	} RTTRACEBUFENTRY;
112	AssertCompile(sizeof(RTTRACEBUFENTRY) <= RTTRACEBUF_ALIGNMENT);
113	/** Pointer to a trace buffer entry. */
114	typedef RTTRACEBUFENTRY *PRTTRACEBUFENTRY;
115
116
117
118	/**
119	* Trace buffer structure.
120	*
121	* @remarks This structure must be context agnostic, i.e. no pointers or
122	* other types that may differ between contexts (R3/R0/RC).
123	*/
124	typedef struct RTTRACEBUFINT
125	{
126	/** Magic value (RTTRACEBUF_MAGIC). */
127	uint32_t u32Magic;
128	/** The entry size. */
129	uint32_t cbEntry;
130	/** The number of entries. */
131	uint32_t cEntries;
132	/** Flags (always zero for now). */
133	uint32_t fFlags;
134	/** The offset to the volatile members (RTTRACEBUFVOLATILE) (relative to
135	* the start of this structure). */
136	uint32_t offVolatile;
137	/** The offset to the entries (relative to the start of this structure). */
138	uint32_t offEntries;
139	/** Reserved entries. */
140	uint32_t au32Reserved[2];
141	} RTTRACEBUFINT;
142	/** Pointer to a const trace buffer. */
143	typedef RTTRACEBUFINT const *PCRTTRACEBUFINT;
144
145
146	/*********************************************************************************************************************************
147	* Defined Constants And Macros *
148	*********************************************************************************************************************************/
149	/**
150	* Get the current CPU Id.
151	*/
152	#if defined(IN_RING0) \
153	\|\| defined(RT_OS_WINDOWS) \
154	\|\| (!defined(RT_ARCH_AMD64) && !defined(RT_ARCH_X86))
155	# define RTTRACEBUF_CUR_CPU() RTMpCpuId()
156	#else
157	# define RTTRACEBUF_CUR_CPU() ASMGetApicId() /** @todo this isn't good enough for big boxes with lots of CPUs/cores. */
158	#endif
159
160	/** Calculates the address of the volatile trace buffer members. */
161	#define RTTRACEBUF_TO_VOLATILE(a_pThis) ((PRTTRACEBUFVOLATILE)((uint8_t *)(a_pThis) + (a_pThis)->offVolatile))
162
163	/** Calculates the address of a trace buffer entry. */
164	#define RTTRACEBUF_TO_ENTRY(a_pThis, a_iEntry) \
165	((PRTTRACEBUFENTRY)( (uint8_t )(a_pThis) + (a_pThis)->offEntries + (a_iEntry) (a_pThis)->cbEntry ))
166
167	/** Validates a trace buffer handle and returns rc if not valid. */
168	#define RTTRACEBUF_VALID_RETURN_RC(a_pThis, a_rc) \
169	do { \
170	AssertPtrReturn((a_pThis), (a_rc)); \
171	AssertReturn((a_pThis)->u32Magic == RTTRACEBUF_MAGIC, (a_rc)); \
172	AssertReturn((a_pThis)->offVolatile < RTTRACEBUF_ALIGNMENT * 2, (a_rc)); \
173	AssertReturn(RTTRACEBUF_TO_VOLATILE(a_pThis)->cRefs > 0, (a_rc)); \
174	} while (0)
175
176	/**
177	* Resolves and validates a trace buffer handle and returns rc if not valid.
178	*
179	* @param a_hTraceBuf The trace buffer handle passed by the user.
180	* @param a_pThis Where to store the trace buffer pointer.
181	*/
182	#define RTTRACEBUF_RESOLVE_VALIDATE_RETAIN_RETURN(a_hTraceBuf, a_pThis) \
183	do { \
184	uint32_t cRefs; \
185	if ((a_hTraceBuf) == RTTRACEBUF_DEFAULT) \
186	{ \
187	(a_pThis) = RTTraceGetDefaultBuf(); \
188	if (!RT_VALID_PTR(a_pThis)) \
189	return VERR_NOT_FOUND; \
190	} \
191	else \
192	{ \
193	(a_pThis) = (a_hTraceBuf); \
194	AssertPtrReturn((a_pThis), VERR_INVALID_HANDLE); \
195	} \
196	AssertReturn((a_pThis)->u32Magic == RTTRACEBUF_MAGIC, VERR_INVALID_HANDLE); \
197	AssertReturn((a_pThis)->offVolatile < RTTRACEBUF_ALIGNMENT * 2, VERR_INVALID_HANDLE); \
198	\
199	cRefs = ASMAtomicIncU32(&RTTRACEBUF_TO_VOLATILE(a_pThis)->cRefs); \
200	if (RT_UNLIKELY(cRefs < 1 \|\| cRefs >= _1M)) \
201	{ \
202	ASMAtomicDecU32(&RTTRACEBUF_TO_VOLATILE(a_pThis)->cRefs); \
203	AssertFailedReturn(VERR_INVALID_HANDLE); \
204	} \
205	} while (0)
206
207
208	/**
209	* Drops a trace buffer reference.
210	*
211	* @param a_pThis Pointer to the trace buffer.
212	*/
213	#define RTTRACEBUF_DROP_REFERENCE(a_pThis) \
214	do { \
215	uint32_t cRefs = ASMAtomicDecU32(&RTTRACEBUF_TO_VOLATILE(a_pThis)->cRefs); \
216	if (!cRefs) \
217	rtTraceBufDestroy((RTTRACEBUFINT *)a_pThis); \
218	} while (0)
219
220
221	/**
222	* The prologue code for a RTTraceAddSomething function.
223	*
224	* Resolves a trace buffer handle, grabs a reference to it and allocates the
225	* next entry. Return with an appropriate error status on failure.
226	*
227	* @param a_hTraceBuf The trace buffer handle passed by the user.
228	*
229	* @remarks This is kind of ugly, sorry.
230	*/
231	#define RTTRACEBUF_ADD_PROLOGUE(a_hTraceBuf) \
232	int rc; \
233	uint32_t cRefs; \
234	uint32_t iEntry; \
235	PCRTTRACEBUFINT pThis; \
236	PRTTRACEBUFVOLATILE pVolatile; \
237	PRTTRACEBUFENTRY pEntry; \
238	char *pszBuf; \
239	size_t cchBuf; \
240	\
241	/* Resolve and validate the handle. */ \
242	if ((a_hTraceBuf) == RTTRACEBUF_DEFAULT) \
243	{ \
244	pThis = RTTraceGetDefaultBuf(); \
245	if (!RT_VALID_PTR(pThis)) \
246	return VERR_NOT_FOUND; \
247	} \
248	else if ((a_hTraceBuf) != NIL_RTTRACEBUF) \
249	{ \
250	pThis = (a_hTraceBuf); \
251	AssertPtrReturn(pThis, VERR_INVALID_HANDLE); \
252	} \
253	else \
254	return VERR_INVALID_HANDLE; \
255	\
256	AssertReturn(pThis->u32Magic == RTTRACEBUF_MAGIC, VERR_INVALID_HANDLE); \
257	if (pThis->fFlags & RTTRACEBUF_FLAGS_DISABLED) \
258	return VINF_SUCCESS; \
259	AssertReturn(pThis->offVolatile < RTTRACEBUF_ALIGNMENT * 2, VERR_INVALID_HANDLE); \
260	pVolatile = RTTRACEBUF_TO_VOLATILE(pThis); \
261	\
262	/* Grab a reference. */ \
263	cRefs = ASMAtomicIncU32(&pVolatile->cRefs); \
264	if (RT_UNLIKELY(cRefs < 1 \|\| cRefs >= _1M)) \
265	{ \
266	ASMAtomicDecU32(&pVolatile->cRefs); \
267	AssertFailedReturn(VERR_INVALID_HANDLE); \
268	} \
269	\
270	/* Grab the next entry and set the time stamp. */ \
271	iEntry = ASMAtomicIncU32(&pVolatile->iEntry) - 1; \
272	iEntry %= pThis->cEntries; \
273	pEntry = RTTRACEBUF_TO_ENTRY(pThis, iEntry); \
274	pEntry->NanoTS = RTTimeNanoTS(); \
275	pEntry->idCpu = RTTRACEBUF_CUR_CPU(); \
276	pszBuf = &pEntry->szMsg[0]; \
277	*pszBuf = '\0'; \
278	cchBuf = pThis->cbEntry - RT_UOFFSETOF(RTTRACEBUFENTRY, szMsg) - 1; \
279	rc = VINF_SUCCESS
280
281
282	/**
283	* Used by a RTTraceAddPosSomething to store the source position in the entry
284	* prior to adding the actual trace message text.
285	*
286	* Both pszBuf and cchBuf will be adjusted such that pszBuf points and the zero
287	* terminator after the source position part.
288	*/
289	#define RTTRACEBUF_ADD_STORE_SRC_POS() \
290	do { \
291	/* file(line): - no path */ \
292	size_t cchPos = RTStrPrintf(pszBuf, cchBuf, "%s(%d): ", RTPathFilename(pszFile), iLine); \
293	pszBuf += cchPos; \
294	cchBuf -= cchPos; \
295	NOREF(pszFunction); \
296	} while (0)
297
298
299	/**
300	* The epilogue code for a RTTraceAddSomething function.
301	*
302	* This will release the trace buffer reference.
303	*/
304	#define RTTRACEBUF_ADD_EPILOGUE() \
305	cRefs = ASMAtomicDecU32(&pVolatile->cRefs); \
306	if (!cRefs) \
307	rtTraceBufDestroy((RTTRACEBUFINT *)pThis); \
308	return rc
309
310
311	#ifndef IN_RC /* Drop this in RC context (too lazy to split the file). */
312
313	RTDECL(int) RTTraceBufCreate(PRTTRACEBUF phTraceBuf, uint32_t cEntries, uint32_t cbEntry, uint32_t fFlags)
314	{
315	AssertPtrReturn(phTraceBuf, VERR_INVALID_POINTER);
316	AssertReturn(!(fFlags & ~(RTTRACEBUF_FLAGS_MASK & ~ RTTRACEBUF_FLAGS_FREE_ME)), VERR_INVALID_PARAMETER);
317	AssertMsgReturn(cbEntry <= RTTRACEBUF_MAX_ENTRIES, ("%#x\n", cbEntry), VERR_OUT_OF_RANGE);
318	AssertMsgReturn(cEntries <= RTTRACEBUF_MAX_ENTRY_SIZE, ("%#x\n", cEntries), VERR_OUT_OF_RANGE);
319
320	/*
321	* Apply default and alignment adjustments.
322	*/
323	if (!cbEntry)
324	cbEntry = RTTRACEBUF_DEF_ENTRY_SIZE;
325	else
326	cbEntry = RT_ALIGN_32(cbEntry, RTTRACEBUF_ALIGNMENT);
327
328	if (!cEntries)
329	cEntries = RTTRACEBUF_DEF_ENTRIES;
330	else if (cEntries < RTTRACEBUF_MIN_ENTRIES)
331	cEntries = RTTRACEBUF_MIN_ENTRIES;
332
333	/*
334	* Calculate the required buffer size, allocte it and hand it on to the
335	* carver API.
336	*/
337	size_t cbBlock = cbEntry * cEntries
338	+ RT_ALIGN_Z(sizeof(RTTRACEBUFINT), RTTRACEBUF_ALIGNMENT)
339	+ RT_ALIGN_Z(sizeof(RTTRACEBUFVOLATILE), RTTRACEBUF_ALIGNMENT);
340	void *pvBlock = RTMemAlloc(cbBlock);
341	if (!((uintptr_t)pvBlock & (RTTRACEBUF_ALIGNMENT - 1)))
342	{
343	RTMemFree(pvBlock);
344	cbBlock += RTTRACEBUF_ALIGNMENT - 1;
345	pvBlock = RTMemAlloc(cbBlock);
346	}
347	int rc;
348	if (pvBlock)
349	{
350	rc = RTTraceBufCarve(phTraceBuf, cEntries, cbEntry, fFlags, pvBlock, &cbBlock);
351	if (RT_FAILURE(rc))
352	RTMemFree(pvBlock);
353	}
354	else
355	rc = VERR_NO_MEMORY;
356	return rc;
357	}
358
359
360	RTDECL(int) RTTraceBufCarve(PRTTRACEBUF phTraceBuf, uint32_t cEntries, uint32_t cbEntry, uint32_t fFlags,
361	void pvBlock, size_t pcbBlock)
362	{
363	AssertPtrReturn(phTraceBuf, VERR_INVALID_POINTER);
364	AssertReturn(!(fFlags & ~RTTRACEBUF_FLAGS_MASK), VERR_INVALID_PARAMETER);
365	AssertMsgReturn(cbEntry <= RTTRACEBUF_MAX_ENTRIES, ("%#x\n", cbEntry), VERR_OUT_OF_RANGE);
366	AssertMsgReturn(cEntries <= RTTRACEBUF_MAX_ENTRY_SIZE, ("%#x\n", cEntries), VERR_OUT_OF_RANGE);
367	AssertPtrReturn(pcbBlock, VERR_INVALID_POINTER);
368	size_t const cbBlock = *pcbBlock;
369	AssertReturn(RT_VALID_PTR(pvBlock) \|\| !cbBlock, VERR_INVALID_POINTER);
370
371	/*
372	* Apply defaults, align sizes and check against available buffer space.
373	* This code can be made a bit more clever, if someone feels like it.
374	*/
375	size_t const cbHdr = RT_ALIGN_Z(sizeof(RTTRACEBUFINT), RTTRACEBUF_ALIGNMENT)
376	+ RT_ALIGN_Z(sizeof(RTTRACEBUFVOLATILE), RTTRACEBUF_ALIGNMENT);
377	size_t const cbEntryBuf = cbBlock > cbHdr ? cbBlock - cbHdr : 0;
378	if (cbEntry)
379	cbEntry = RT_ALIGN_32(cbEntry, RTTRACEBUF_ALIGNMENT);
380	else
381	{
382	if (!cbEntryBuf)
383	{
384	cbEntry = RTTRACEBUF_DEF_ENTRY_SIZE;
385	cEntries = RTTRACEBUF_DEF_ENTRIES;
386	}
387	else if (cEntries)
388	{
389	size_t cbEntryZ = cbBlock / cEntries;
390	cbEntryZ &= ~(RTTRACEBUF_ALIGNMENT - 1);
391	if (cbEntryZ > RTTRACEBUF_MAX_ENTRIES)
392	cbEntryZ = RTTRACEBUF_MAX_ENTRIES;
393	cbEntry = (uint32_t)cbEntryZ;
394	}
395	else if (cbBlock >= RT_ALIGN_32(512, RTTRACEBUF_ALIGNMENT) * 256)
396	cbEntry = RT_ALIGN_32(512, RTTRACEBUF_ALIGNMENT);
397	else if (cbBlock >= RT_ALIGN_32(256, RTTRACEBUF_ALIGNMENT) * 64)
398	cbEntry = RT_ALIGN_32(256, RTTRACEBUF_ALIGNMENT);
399	else if (cbBlock >= RT_ALIGN_32(128, RTTRACEBUF_ALIGNMENT) * 32)
400	cbEntry = RT_ALIGN_32(128, RTTRACEBUF_ALIGNMENT);
401	else
402	cbEntry = sizeof(RTTRACEBUFENTRY);
403	}
404	Assert(RT_ALIGN_32(cbEntry, RTTRACEBUF_ALIGNMENT) == cbEntry);
405
406	if (!cEntries)
407	{
408	size_t cEntriesZ = cbEntryBuf / cbEntry;
409	if (cEntriesZ > RTTRACEBUF_MAX_ENTRIES)
410	cEntriesZ = RTTRACEBUF_MAX_ENTRIES;
411	cEntries = (uint32_t)cEntriesZ;
412	}
413	if (cEntries < RTTRACEBUF_MIN_ENTRIES)
414	cEntries = RTTRACEBUF_MIN_ENTRIES;
415
416	uint32_t offVolatile = RTTRACEBUF_ALIGNMENT - ((uintptr_t)pvBlock & (RTTRACEBUF_ALIGNMENT - 1));
417	if (offVolatile < sizeof(RTTRACEBUFINT))
418	offVolatile += RTTRACEBUF_ALIGNMENT;
419	size_t cbReqBlock = offVolatile
420	+ RT_ALIGN_Z(sizeof(RTTRACEBUFVOLATILE), RTTRACEBUF_ALIGNMENT)
421	+ cbEntry * cEntries;
422	if (*pcbBlock < cbReqBlock)
423	{
424	*pcbBlock = cbReqBlock;
425	return VERR_BUFFER_OVERFLOW;
426	}
427
428	/*
429	* Do the carving.
430	*/
431	memset(pvBlock, 0, cbBlock);
432
433	RTTRACEBUFINT pThis = (RTTRACEBUFINT )pvBlock;
434	pThis->u32Magic = RTTRACEBUF_MAGIC;
435	pThis->cbEntry = cbEntry;
436	pThis->cEntries = cEntries;
437	pThis->fFlags = fFlags;
438	pThis->offVolatile = offVolatile;
439	pThis->offEntries = offVolatile + RT_ALIGN_Z(sizeof(RTTRACEBUFVOLATILE), RTTRACEBUF_ALIGNMENT);
440
441	PRTTRACEBUFVOLATILE pVolatile = (PRTTRACEBUFVOLATILE)((uint8_t *)pThis + offVolatile);
442	pVolatile->cRefs = 1;
443	pVolatile->iEntry = 0;
444
445	*pcbBlock = cbBlock - cbReqBlock;
446	*phTraceBuf = pThis;
447	return VINF_SUCCESS;
448	}
449
450	#endif /* !IN_RC */
451
452
453	/**
454	* Destructor.
455	*
456	* @param pThis The trace buffer to destroy.
457	*/
458	static void rtTraceBufDestroy(RTTRACEBUFINT *pThis)
459	{
460	AssertReturnVoid(ASMAtomicCmpXchgU32(&pThis->u32Magic, RTTRACEBUF_MAGIC_DEAD, RTTRACEBUF_MAGIC));
461	if (pThis->fFlags & RTTRACEBUF_FLAGS_FREE_ME)
462	{
463	#ifdef IN_RC
464	AssertReleaseFailed();
465	#else
466	RTMemFree(pThis);
467	#endif
468	}
469	}
470
471
472	RTDECL(uint32_t) RTTraceBufRetain(RTTRACEBUF hTraceBuf)
473	{
474	PCRTTRACEBUFINT pThis = hTraceBuf;
475	RTTRACEBUF_VALID_RETURN_RC(pThis, UINT32_MAX);
476	return ASMAtomicIncU32(&RTTRACEBUF_TO_VOLATILE(pThis)->cRefs);
477	}
478
479
480	RTDECL(uint32_t) RTTraceBufRelease(RTTRACEBUF hTraceBuf)
481	{
482	if (hTraceBuf == NIL_RTTRACEBUF)
483	return 0;
484
485	PCRTTRACEBUFINT pThis = hTraceBuf;
486	RTTRACEBUF_VALID_RETURN_RC(pThis, UINT32_MAX);
487
488	uint32_t cRefs = ASMAtomicDecU32(&RTTRACEBUF_TO_VOLATILE(pThis)->cRefs);
489	if (!cRefs)
490	rtTraceBufDestroy((RTTRACEBUFINT *)pThis);
491	return cRefs;
492	}
493
494
495	RTDECL(int) RTTraceBufAddMsg(RTTRACEBUF hTraceBuf, const char *pszMsg)
496	{
497	RTTRACEBUF_ADD_PROLOGUE(hTraceBuf);
498	RTStrCopy(pszBuf, cchBuf, pszMsg);
499	RTTRACEBUF_ADD_EPILOGUE();
500	}
501
502
503	RTDECL(int) RTTraceBufAddMsgEx( RTTRACEBUF hTraceBuf, const char *pszMsg, size_t cbMaxMsg)
504	{
505	RTTRACEBUF_ADD_PROLOGUE(hTraceBuf);
506	RTStrCopyEx(pszBuf, cchBuf, pszMsg, cbMaxMsg);
507	RTTRACEBUF_ADD_EPILOGUE();
508	}
509
510
511	RTDECL(int) RTTraceBufAddMsgF(RTTRACEBUF hTraceBuf, const char *pszMsgFmt, ...)
512	{
513	int rc;
514	va_list va;
515	va_start(va, pszMsgFmt);
516	rc = RTTraceBufAddMsgV(hTraceBuf, pszMsgFmt, va);
517	va_end(va);
518	return rc;
519	}
520
521
522	RTDECL(int) RTTraceBufAddMsgV(RTTRACEBUF hTraceBuf, const char *pszMsgFmt, va_list va)
523	{
524	RTTRACEBUF_ADD_PROLOGUE(hTraceBuf);
525	RTStrPrintfV(pszBuf, cchBuf, pszMsgFmt, va);
526	RTTRACEBUF_ADD_EPILOGUE();
527	}
528
529
530	RTDECL(int) RTTraceBufAddPos(RTTRACEBUF hTraceBuf, RT_SRC_POS_DECL)
531	{
532	RTTRACEBUF_ADD_PROLOGUE(hTraceBuf);
533	RTTRACEBUF_ADD_STORE_SRC_POS();
534	RTTRACEBUF_ADD_EPILOGUE();
535	}
536
537
538	RTDECL(int) RTTraceBufAddPosMsg(RTTRACEBUF hTraceBuf, RT_SRC_POS_DECL, const char *pszMsg)
539	{
540	RTTRACEBUF_ADD_PROLOGUE(hTraceBuf);
541	RTTRACEBUF_ADD_STORE_SRC_POS();
542	RTStrCopy(pszBuf, cchBuf, pszMsg);
543	RTTRACEBUF_ADD_EPILOGUE();
544	}
545
546
547	RTDECL(int) RTTraceBufAddPosMsgEx(RTTRACEBUF hTraceBuf, RT_SRC_POS_DECL, const char *pszMsg, size_t cbMaxMsg)
548	{
549	RTTRACEBUF_ADD_PROLOGUE(hTraceBuf);
550	RTTRACEBUF_ADD_STORE_SRC_POS();
551	RTStrCopyEx(pszBuf, cchBuf, pszMsg, cbMaxMsg);
552	RTTRACEBUF_ADD_EPILOGUE();
553	}
554
555
556	RTDECL(int) RTTraceBufAddPosMsgF(RTTRACEBUF hTraceBuf, RT_SRC_POS_DECL, const char *pszMsgFmt, ...)
557	{
558	int rc;
559	va_list va;
560	va_start(va, pszMsgFmt);
561	rc = RTTraceBufAddPosMsgV(hTraceBuf, RT_SRC_POS_ARGS, pszMsgFmt, va);
562	va_end(va);
563	return rc;
564	}
565
566
567	RTDECL(int) RTTraceBufAddPosMsgV(RTTRACEBUF hTraceBuf, RT_SRC_POS_DECL, const char *pszMsgFmt, va_list va)
568	{
569	RTTRACEBUF_ADD_PROLOGUE(hTraceBuf);
570	RTTRACEBUF_ADD_STORE_SRC_POS();
571	RTStrPrintfV(pszBuf, cchBuf, pszMsgFmt, va);
572	RTTRACEBUF_ADD_EPILOGUE();
573	}
574
575
576	RTDECL(int) RTTraceBufEnumEntries(RTTRACEBUF hTraceBuf, PFNRTTRACEBUFCALLBACK pfnCallback, void *pvUser)
577	{
578	int rc = VINF_SUCCESS;
579	uint32_t iBase;
580	uint32_t cLeft;
581	PCRTTRACEBUFINT pThis;
582	RTTRACEBUF_RESOLVE_VALIDATE_RETAIN_RETURN(hTraceBuf, pThis);
583
584	iBase = ASMAtomicReadU32(&RTTRACEBUF_TO_VOLATILE(pThis)->iEntry);
585	cLeft = pThis->cEntries;
586	while (cLeft--)
587	{
588	PRTTRACEBUFENTRY pEntry;
589
590	iBase %= pThis->cEntries;
591	pEntry = RTTRACEBUF_TO_ENTRY(pThis, iBase);
592	if (pEntry->NanoTS)
593	{
594	rc = pfnCallback((RTTRACEBUF)pThis, cLeft, pEntry->NanoTS, pEntry->idCpu, pEntry->szMsg, pvUser);
595	if (rc != VINF_SUCCESS)
596	break;
597	}
598
599	/* next */
600	iBase += 1;
601	}
602
603	RTTRACEBUF_DROP_REFERENCE(pThis);
604	return rc;
605	}
606
607
608	RTDECL(uint32_t) RTTraceBufGetEntrySize(RTTRACEBUF hTraceBuf)
609	{
610	PCRTTRACEBUFINT pThis = hTraceBuf;
611	RTTRACEBUF_VALID_RETURN_RC(pThis, 0);
612	return pThis->cbEntry;
613	}
614
615
616	RTDECL(uint32_t) RTTraceBufGetEntryCount(RTTRACEBUF hTraceBuf)
617	{
618	PCRTTRACEBUFINT pThis = hTraceBuf;
619	RTTRACEBUF_VALID_RETURN_RC(pThis, 0);
620	return pThis->cEntries;
621	}
622
623
624	RTDECL(bool) RTTraceBufDisable(RTTRACEBUF hTraceBuf)
625	{
626	PCRTTRACEBUFINT pThis = hTraceBuf;
627	RTTRACEBUF_VALID_RETURN_RC(pThis, false);
628	return !ASMAtomicBitTestAndSet((void volatile *)&pThis->fFlags, RTTRACEBUF_FLAGS_DISABLED_BIT);
629	}
630
631
632	RTDECL(bool) RTTraceBufEnable(RTTRACEBUF hTraceBuf)
633	{
634	PCRTTRACEBUFINT pThis = hTraceBuf;
635	RTTRACEBUF_VALID_RETURN_RC(pThis, false);
636	return !ASMAtomicBitTestAndClear((void volatile *)&pThis->fFlags, RTTRACEBUF_FLAGS_DISABLED_BIT);
637	}
638
639
640	/*
641	*
642	* Move the following to a separate file, consider using the enumerator.
643	*
644	*/
645
646	RTDECL(int) RTTraceBufDumpToLog(RTTRACEBUF hTraceBuf)
647	{
648	uint32_t iBase;
649	uint32_t cLeft;
650	PCRTTRACEBUFINT pThis;
651	RTTRACEBUF_RESOLVE_VALIDATE_RETAIN_RETURN(hTraceBuf, pThis);
652
653	iBase = ASMAtomicReadU32(&RTTRACEBUF_TO_VOLATILE(pThis)->iEntry);
654	cLeft = pThis->cEntries;
655	while (cLeft--)
656	{
657	PRTTRACEBUFENTRY pEntry;
658
659	iBase %= pThis->cEntries;
660	pEntry = RTTRACEBUF_TO_ENTRY(pThis, iBase);
661	if (pEntry->NanoTS)
662	RTLogPrintf("%04u/%'llu/%02x: %s\n", cLeft, pEntry->NanoTS, pEntry->idCpu, pEntry->szMsg);
663
664	/* next */
665	iBase += 1;
666	}
667
668	RTTRACEBUF_DROP_REFERENCE(pThis);
669	return VINF_SUCCESS;
670	}
671
672
673	RTDECL(int) RTTraceBufDumpToAssert(RTTRACEBUF hTraceBuf)
674	{
675	uint32_t iBase;
676	uint32_t cLeft;
677	PCRTTRACEBUFINT pThis;
678	RTTRACEBUF_RESOLVE_VALIDATE_RETAIN_RETURN(hTraceBuf, pThis);
679
680	iBase = ASMAtomicReadU32(&RTTRACEBUF_TO_VOLATILE(pThis)->iEntry);
681	cLeft = pThis->cEntries;
682	while (cLeft--)
683	{
684	PRTTRACEBUFENTRY pEntry;
685
686	iBase %= pThis->cEntries;
687	pEntry = RTTRACEBUF_TO_ENTRY(pThis, iBase);
688	if (pEntry->NanoTS)
689	RTAssertMsg2AddWeak("%u/%'llu/%02x: %s\n", cLeft, pEntry->NanoTS, pEntry->idCpu, pEntry->szMsg);
690
691	/* next */
692	iBase += 1;
693	}
694
695	RTTRACEBUF_DROP_REFERENCE(pThis);
696	return VINF_SUCCESS;
697	}
698

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source: vbox/trunk/src/VBox/Runtime/common/log/tracebuf.cpp@ 98103

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