tracelog.h@ 71496

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1	/** @file
2	* IPRT - Binary trace log API.
3	*/
4
5	/*
6	* Copyright (C) 2018 Oracle Corporation
7	*
8	* This file is part of VirtualBox Open Source Edition (OSE), as
9	* available from http://www.virtualbox.org. This file is free software;
10	* you can redistribute it and/or modify it under the terms of the GNU
11	* General Public License (GPL) as published by the Free Software
12	* Foundation, in version 2 as it comes in the "COPYING" file of the
13	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
14	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
15	*
16	* The contents of this file may alternatively be used under the terms
17	* of the Common Development and Distribution License Version 1.0
18	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
19	* VirtualBox OSE distribution, in which case the provisions of the
20	* CDDL are applicable instead of those of the GPL.
21	*
22	* You may elect to license modified versions of this file under the
23	* terms and conditions of either the GPL or the CDDL or both.
24	*/
25
26	#ifndef ___iprt_tracelog_h
27	#define ___iprt_tracelog_h
28
29	#include <iprt/sg.h>
30	#include <iprt/types.h>
31	#include <iprt/err.h>
32
33	RT_C_DECLS_BEGIN
34
35
36	/** @defgroup grp_tracelog RTTraceLog - Binary trace log API
37	* @ingroup grp_rt
38	* @{
39	*/
40
41	/**
42	* Trace log item type.
43	*/
44	typedef enum RTTRACELOGTYPE
45	{
46	/** Invalid first value. */
47	RTTRACELOGTYPE_INVALID = 0,
48	/** Boolean item type. */
49	RTTRACELOGTYPE_BOOL,
50	/** Unsigned 8bit integer type. */
51	RTTRACELOGTYPE_UINT8,
52	/** Signed 8bit integer type. */
53	RTTRACELOGTYPE_INT8,
54	/** Unsigned 16bit integer type. */
55	RTTRACELOGTYPE_UINT16,
56	/** Signed 16bit integer type. */
57	RTTRACELOGTYPE_INT16,
58	/** Unsigned 32bit integer type. */
59	RTTRACELOGTYPE_UINT32,
60	/** Signed 32bit integer type. */
61	RTTRACELOGTYPE_INT32,
62	/** Unsigned 64bit integer type. */
63	RTTRACELOGTYPE_UINT64,
64	/** Signed 64bit integer type. */
65	RTTRACELOGTYPE_INT64,
66	/** 32bit floating point type. */
67	RTTRACELOGTYPE_FLOAT32,
68	/** 64bit floating point type. */
69	RTTRACELOGTYPE_FLOAT64,
70	/** Raw binary data type. */
71	RTTRACELOGTYPE_RAWDATA,
72	/** Pointer data type. */
73	RTTRACELOGTYPE_POINTER,
74	/** size_t data type. */
75	RTTRACELOGTYPE_SIZE,
76	/** 32-bit hack. */
77	RTTRACELOGTYPE_32BIT_HACK = 0x7fffffff
78	} RTTRACELOGTYPE;
79	/** Pointer to a trace log item type. */
80	typedef RTTRACELOGTYPE *PRTTRACELOGTYPE;
81	/** Pointer to a const trace log item type. */
82	typedef const RTTRACELOGTYPE *PCRTTRACELOGTYPE;
83
84
85	/**
86	* Trace log event severity.
87	*/
88	typedef enum RTTRACELOGEVTSEVERITY
89	{
90	/** Invalid severity. */
91	RTTRACELOGEVTSEVERITY_INVALID = 0,
92	/** Informational event. */
93	RTTRACELOGEVTSEVERITY_INFO,
94	/** Warning event. */
95	RTTRACELOGEVTSEVERITY_WARNING,
96	/** Error event. */
97	RTTRACELOGEVTSEVERITY_ERROR,
98	/** Fatal event. */
99	RTTRACELOGEVTSEVERITY_FATAL,
100	/** Debug event. */
101	RTTRACELOGEVTSEVERITY_DEBUG,
102	/** 32bit hack.*/
103	RTTRACELOGEVTSEVERITY_32BIT_HACK = 0x7fffffff
104	} RTTRACELOGEVTSEVERITY;
105	/** Pointer to a event severity class. */
106	typedef RTTRACELOGEVTSEVERITY *PRTTRACELOGEVTSEVERITY;
107	/** Pointer to a const event severiy class. */
108	typedef RTTRACELOGEVTSEVERITY *PCRTTRACELOGEVTSEVERITY;
109
110
111	/**
112	* Trace log reader event.
113	*/
114	typedef enum RTTRACELOGRDRPOLLEVT
115	{
116	/** Invalid event. */
117	RTTRACELOGRDRPOLLEVT_INVALID = 0,
118	/** The header was received and valid. */
119	RTTRACELOGRDRPOLLEVT_HDR_RECVD,
120	/** Event data was fetched. */
121	RTTRACELOGRDRPOLLEVT_TRACE_EVENT_RECVD,
122	/** 32bit hack. */
123	RTTRACELOGRDRPOLLEVT_32BIT_HACK = 0x7fffffff
124	} RTTRACELOGRDRPOLLEVT;
125	/** Pointer to a trace log reader event. */
126	typedef RTTRACELOGRDRPOLLEVT *PRTTRACELOGRDRPOLLEVT;
127
128
129	/**
130	* Trace log event item descriptor.
131	*/
132	typedef struct RTTRACELOGEVTITEMDESC
133	{
134	/** Event item name. */
135	const char *pszName;
136	/** Event item description. */
137	const char *pszDesc;
138	/** Event item type. */
139	RTTRACELOGTYPE enmType;
140	/** The size of the raw data if static for the item,
141	* 0 otherwise (and given when the event is logged).
142	* Only valid for the RTTRACELOGTYPE_RAWDATA type,
143	* ignored otherwise. */
144	size_t cbRawData;
145	} RTTRACELOGEVTITEMDESC;
146	/** Pointer to an trace log event item descriptor. */
147	typedef RTTRACELOGEVTITEMDESC *PRTTRACELOGEVTITEMDESC;
148	/** Pointer to a const trace log event item descriptor. */
149	typedef const RTTRACELOGEVTITEMDESC *PCRTTRACELOGEVTITEMDESC;
150	/** Pointer to a trace log event item descriptor pointer. */
151	typedef PRTTRACELOGEVTITEMDESC *PPRTTRACELOGEVTITEMDESC;
152	/** Pointer to a const trace log event item descriptor pointer. */
153	typedef PCRTTRACELOGEVTITEMDESC *PPCRTTRACELOGEVTITEMDESC;
154
155
156	/**
157	* Trace log event descriptor.
158	*/
159	typedef struct RTTRACELOGEVTDESC
160	{
161	/** Event identifier. */
162	const char *pszId;
163	/** Event description. */
164	const char *pszDesc;
165	/** Severity class of the event. */
166	RTTRACELOGEVTSEVERITY enmSeverity;
167	/** Number of items recorded for an event. */
168	uint32_t cEvtItems;
169	/** Pointer to array of event item descriptors. */
170	PCRTTRACELOGEVTITEMDESC paEvtItemDesc;
171	} RTTRACELOGEVTDESC;
172	/** Pointer to a trace log event descriptor. */
173	typedef RTTRACELOGEVTDESC *PRTTRACELOGEVTDESC;
174	/** Pointer to a const trace log event descriptor. */
175	typedef const RTTRACELOGEVTDESC *PCRTTRACELOGEVTDESC;
176
177
178	/**
179	* Trace log event item value.
180	*/
181	typedef struct RTTRACELOGEVTVAL
182	{
183	/** Pointer to the corresponding event item descriptor. */
184	PCRTTRACELOGEVTITEMDESC pItemDesc;
185	/** Value union. */
186	union
187	{
188	bool f;
189	uint8_t u8;
190	int8_t i8;
191	uint16_t u16;
192	int16_t i16;
193	uint32_t u32;
194	int32_t i32;
195	uint64_t u64;
196	int64_t i64;
197	uint64_t sz;
198	uint64_t uPtr;
199	float f32;
200	double f64;
201	struct
202	{
203	size_t cb;
204	const uint8_t *pb;
205	} RawData;
206	} u;
207	} RTTRACELOGEVTVAL;
208	/** Pointer to trace log event item value. */
209	typedef RTTRACELOGEVTVAL *PRTTRACELOGEVTVAL;
210	/** Pointer to a const trace log event item value. */
211	typedef const RTTRACELOGEVTVAL *PCRTTRACELOGEVTVAL;
212
213
214	/** Event group ID. */
215	typedef uint64_t RTTRACELOGEVTGRPID;
216	/** Pointer to the event group ID. */
217	typedef RTTRACELOGEVTGRPID *PRTTRACELOGEVTGRPID;
218	/** Trace log event handle. */
219	typedef uint64_t RTRACELOGEVT;
220	/** Pointer to a trace log event handle. */
221	typedef RTRACELOGEVT *PRTRACELOGEVT;
222	/** Trace log writer handle. */
223	typedef struct RTTRACELOGWRINT *RTTRACELOGWR;
224	/** Pointer to a trace log writer handle. */
225	typedef RTTRACELOGWR *PRTTRACELOGWR;
226	/** NIL trace log writer handle value. */
227	#define NIL_RTTRACELOGWR ((RTTRACELOGWR)0)
228	/** Trace log reader handle. */
229	typedef struct RTTRACELOGRDRINT *RTTRACELOGRDR;
230	/** Pointer to a trace log reader handle. */
231	typedef RTTRACELOGRDR *PRTTRACELOGRDR;
232	/** NIL trace log reader handle value. */
233	#define NIL_RTTRACELOGRDR ((RTTRACELOGRDR)0)
234	/** Trace log reader iterator handle. */
235	typedef struct RTTRACELOGRDRITINT *RTTRACELOGRDRIT;
236	/** Pointer to a trace log reader iterator handle. */
237	typedef RTTRACELOGRDRIT *PRTTRACELOGRDRIT;
238	/** NIL trace log reader iterator handle. */
239	#define NIL_RTTRACELOGRDRIT ((RTTRACELOGRDRIT)0)
240	/** Trace log reader event handle. */
241	typedef struct RTTRACELOGRDREVTINT *RTTRACELOGRDREVT;
242	/** Pointer to a trace log reader event handle. */
243	typedef RTTRACELOGRDREVT *PRTTRACELOGRDREVT;
244
245	/** A new grouped event is started. */
246	#define RTTRACELOG_WR_ADD_EVT_F_GRP_START RT_BIT_32(0)
247	/** A grouped event is finished. */
248	#define RTTRACELOG_WR_ADD_EVT_F_GRP_FINISH RT_BIT_32(1)
249
250	/**
251	* Callback to stream out data from the trace log writer.
252	*
253	* @returns IPRT status code.
254	* @param pvUser Opaque user data passed on trace log writer creation.
255	* @param pvBuf Pointer to the buffer to stream out.
256	* @param cbBuf Number of bytes to stream.
257	* @param pcbWritten Where to store the number of bytes written on success, optional.
258	*/
259	typedef DECLCALLBACK(int) FNRTTRACELOGWRSTREAM(void pvUser, const void pvBuf, size_t cbBuf, size_t *pcbWritten);
260	/** Pointer to a writer stream callback. */
261	typedef FNRTTRACELOGWRSTREAM *PFNRTTRACELOGWRSTREAM;
262
263
264	/**
265	* Callback to stream int data to the trace log reader.
266	*
267	* @returns IPRT status code.
268	* @retval VERR_EOF if the stream reached the end.
269	* @retval VERR_INTERRUPTED if waiting for something to arrive was interrupted.
270	* @retval VERR_TIMEOUT if the timeout was reached.
271	* @param pvUser Opaque user data passed on trace log reader creation.
272	* @param pvBuf Where to store the read data.
273	* @param cbBuf Number of bytes the buffer can hold.
274	* @param pcbRead Where to store the number of bytes read on success.
275	* @param cMsTimeout How long to wait for something to arrive
276	*/
277	typedef DECLCALLBACK(int) FNRTTRACELOGRDRSTREAM(void pvUser, void pvBuf, size_t cbBuf, size_t *pcbRead,
278	RTMSINTERVAL cMsTimeout);
279	/** Pointer to a writer stream callback. */
280	typedef FNRTTRACELOGRDRSTREAM *PFNRTTRACELOGRDRSTREAM;
281
282
283	/**
284	* Callback to close the stream.
285	*
286	* @returns IPRT status code.
287	* @param pvUser Opaque user data passed on trace log writer creation.
288	*/
289	typedef DECLCALLBACK(int) FNRTTRACELOGSTREAMCLOSE(void *pvUser);
290	/** Pointer to a stream close callback. */
291	typedef FNRTTRACELOGSTREAMCLOSE *PFNRTTRACELOGSTREAMCLOSE;
292
293
294	/**
295	* Creates a new trace log writer.
296	*
297	* @returns IPRT status code.
298	* @param phTraceLogWr Where to store the handle to the trace log writer on success.
299	* @param pszDesc Optional description to store in the header.
300	* @param pfnStreamOut The callback to use for streaming the trace log data.
301	* @param pfnStreamClose The callback to use for closing the stream.
302	* @param pvUser Opaque user data to pass to the streaming callback.
303	*/
304	RTDECL(int) RTTraceLogWrCreate(PRTTRACELOGWR phTraceLogWr, const char *pszDesc,
305	PFNRTTRACELOGWRSTREAM pfnStreamOut,
306	PFNRTTRACELOGSTREAMCLOSE pfnStreamClose, void *pvUser);
307
308
309	/**
310	* Creates a new trace log writer streaming data to the given file.
311	*
312	* @returns IPRT status code.
313	* @param phTraceLogWr Where to store the handle to the trace log writer on success.
314	* @param pszDesc Optional description to store in the header.
315	* @param pszFilename The filename to stream the data to.
316	*/
317	RTDECL(int) RTTraceLogWrCreateFile(PRTTRACELOGWR phTraceLogWr, const char *pszDesc,
318	const char *pszFilename);
319
320
321	/**
322	* Creates a new TCP server style trace log writer waiting for the other end to connect to it.
323	*
324	* @returns IPRT status code.
325	* @param phTraceLogWr Where to store the handle to the trace log writer on success.
326	* @param pszDesc Optional description to store in the header.
327	* @param pszListen The address to listen on, NULL to listen on all interfaces.
328	* @param uPort The port to listen on.
329	*
330	* @note The writer will block here until a client has connected.
331	*/
332	RTDECL(int) RTTraceLogWrCreateTcpServer(PRTTRACELOGWR phTraceLogWr, const char *pszDesc,
333	const char *pszListen, unsigned uPort);
334
335
336	/**
337	* Creates a new TCP client style trace log writer connecting to the other end.
338	*
339	* @returns IPRT status code.
340	* @param phTraceLogWr Where to store the handle to the trace log writer on success.
341	* @param pszDesc Optional description to store in the header.
342	* @param pszAddress The address to connect to.
343	* @param uPort The port to connect to.
344	*
345	* @note An error is returned if no connection can be established.
346	*/
347	RTDECL(int) RTTraceLogWrCreateTcpClient(PRTTRACELOGWR phTraceLogWr, const char *pszDesc,
348	const char *pszAddress, unsigned uPort);
349
350
351	/**
352	* Destroys the given trace log writer instance.
353	*
354	* @returns IPRT status code.
355	* @param hTraceLogWr The trace log writer instance handle.
356	*/
357	RTDECL(int) RTTraceLogWrDestroy(RTTRACELOGWR hTraceLogWr);
358
359
360	/**
361	* Adds a given event structure descriptor to the given trace log writer instance
362	* (for prepopulation).
363	*
364	* @returns IPRT status code.
365	* @param hTraceLogWr The trace log writer instance handle.
366	* @param pEvtDesc The event structure descriptor to add.
367	*
368	* @note The event descriptor is keyed by the pointer for faster lookup in subsequent calls,
369	* so don't free after this method finishes.
370	*/
371	RTDECL(int) RTTraceLogWrAddEvtDesc(RTTRACELOGWR hTraceLogWr, PCRTTRACELOGEVTDESC pEvtDesc);
372
373
374	/**
375	* Adds a new event to the trace log.
376	*
377	* @returns IPRT status code.
378	* @param hTraceLogWr The trace log writer instance handle.
379	* @param pEvtDesc The event descriptor to use for formatting.
380	* @param fFlags Flags to use for this event.y
381	* @param uGrpId A unique group ID for grouped events.
382	* @param uParentGrpId A parent group ID this event originated from.
383	* @param pvEvtData Pointer to the raw event data.
384	* @param pacbRawData Pointer to the array of size indicators for non static raw data in the event data stream.
385	*
386	* @note The event descriptor is keyed by the pointer for faster lookup in subsequent calls,
387	* so don't free after this method finishes.
388	*/
389	RTDECL(int) RTTraceLogWrEvtAdd(RTTRACELOGWR hTraceLogWr, PCRTTRACELOGEVTDESC pEvtDesc, uint32_t fFlags,
390	RTTRACELOGEVTGRPID uGrpId, RTTRACELOGEVTGRPID uParentGrpId,
391	const void pvEvtData, size_t pacbRawData);
392
393
394	/**
395	* Adds a new event to the trace log.
396	*
397	* @returns IPRT status code.
398	* @param hTraceLogWr The trace log writer instance handle.
399	* @param pEvtDesc The event descriptor used for formatting the data.
400	* @param fFlags Flags to use for this event.
401	* @param uGrpId A unique group ID for grouped events.
402	* @param uParentGrpId A parent group ID this event originated from.
403	* @param pSgBufEvtData S/G buffer holding the raw event data.
404	* @param pacbRawData Pointer to the array of size indicators for non static raw data in the event data stream.
405	*
406	* @note The event descriptor is keyed by the pointer for faster lookup in subsequent calls,
407	* so don't free after this method finishes.
408	*/
409	RTDECL(int) RTTraceLogWrEvtAddSg(RTTRACELOGWR hTraceLogWr, PCRTTRACELOGEVTDESC pEvtDesc, uint32_t fFlags,
410	RTTRACELOGEVTGRPID uGrpId, RTTRACELOGEVTGRPID uParentGrpId,
411	PRTSGBUF pSgBufEvtData, size_t pacbRawData);
412
413
414	/**
415	* Creates a new trace log reader instance.
416	*
417	* @returns IPRT status code.
418	* @param phTraceLogRdr Where to store the handle to the trace log reader instance on success.
419	* @param pfnStreamIn Callback to stream the data into the reader.
420	* @param pfnStreamClose The callback to use for closing the stream.
421	* @param pvUser Opaque user data passed to the stream callback.
422	*/
423	RTDECL(int) RTTraceLogRdrCreate(PRTTRACELOGRDR phTraceLogRdr, PFNRTTRACELOGRDRSTREAM pfnStreamIn,
424	PFNRTTRACELOGSTREAMCLOSE pfnStreamClose, void *pvUser);
425
426
427	/**
428	* Creates a new trace log reader for the given file.
429	*
430	* @returns IPRT status code.
431	* @param phTraceLogRdr Where to store the handle to the trace log reader instance on success.
432	* @param pszFilename The file to read the trace log data from.
433	*/
434	RTDECL(int) RTTraceLogRdrCreateFromFile(PRTTRACELOGRDR phTraceLogRdr, const char *pszFilename);
435
436
437	/**
438	* Destroys the given trace log reader instance.
439	*
440	* @returns IPRT status code.
441	* @param hTraceLogRdr The trace log reader instance handle.
442	*/
443	RTDECL(int) RTTraceLogRdrDestroy(RTTRACELOGRDR hTraceLogRdr);
444
445
446	/**
447	* Polls for an event on the trace log reader instance.
448	*
449	* @returns IPRT status code.
450	* @retval VERR_TIMEOUT if the timeout was reached.
451	* @retval VERR_INTERRUPTED if the poll was interrupted.
452	* @param hTraceLogRdr The trace log reader instance handle.
453	* @param penmEvt Where to store the event identifier.
454	* @param cMsTimeout How long to poll for an event.
455	*/
456	RTDECL(int) RTTraceLogRdrEvtPoll(RTTRACELOGRDR hTraceLogRdr, RTTRACELOGRDRPOLLEVT *penmEvt, RTMSINTERVAL cMsTimeout);
457
458	/**
459	* Queries the last received event from the trace log read instance.
460	*
461	* @returns IPRT status code.
462	* @retval VERR_NOT_FOUND if no event was received so far.
463	* @param hTraceLogRdr The trace log reader instance handle.
464	* @param phRdrEvt Where to store the event handle on success.
465	*/
466	RTDECL(int) RTTraceLogRdrQueryLastEvt(RTTRACELOGRDR hTraceLogRdr, PRTTRACELOGRDREVT phRdrEvt);
467
468	/**
469	* Queries a new iterator for walking received events.
470	*
471	* @returns IPRT status code
472	* @param hTraceLogRdr The trace log reader instance handle.
473	* @param phIt Where to store the handle to iterator on success.
474	*/
475	RTDECL(int) RTTraceLogRdrQueryIterator(RTTRACELOGRDR hTraceLogRdr, PRTTRACELOGRDRIT phIt);
476
477
478	/**
479	* Frees a previously created iterator.
480	*
481	* @returns nothing.
482	* @param hIt The iterator handle to free.
483	*/
484	RTDECL(void) RTTraceLogRdrIteratorFree(RTTRACELOGRDRIT hIt);
485
486
487	/**
488	* Advances to the next event.
489	*
490	* @returns IPRT status code
491	* @retval VERR_TRACELOG_READER_ITERATOR_END if the iterator reached the end.
492	* @param hIt The iterator handle.
493	*/
494	RTDECL(int) RTTraceLogRdrIteratorNext(RTTRACELOGRDRIT hIt);
495
496
497	/**
498	* Queries the event at the current iterator position.
499	*
500	* @returns IPRT status code.
501	* @param hIt The iterator handle.
502	* @param phRdrEvt Where to store the event handle on success.
503	*/
504	RTDECL(int) RTTraceLogRdrIteratorQueryEvent(RTTRACELOGRDRIT hIt, PRTTRACELOGRDREVT phRdrEvt);
505
506
507	/**
508	* Returns the sequence number of the given event.
509	*
510	* @returns Sequence number of the given event.
511	* @param hRdrEvt The reader event handle.
512	*/
513	RTDECL(uint64_t) RTTraceLogRdrEvtGetSeqNo(RTTRACELOGRDREVT hRdrEvt);
514
515
516	/**
517	* Gets the timestamp of the given event.
518	*
519	* @returns Timestamp of the given event.
520	* @param hRdrEvt The reader event handle.
521	*/
522	RTDECL(uint64_t) RTTraceLogRdrEvtGetTs(RTTRACELOGRDREVT hRdrEvt);
523
524
525	/**
526	* Returns whether the given event is part of an event group.
527	*
528	* @returns Flag whether the event is part of a group.
529	* @param hRdrEvt The reader event handle.
530	*/
531	RTDECL(bool) RTTraceLogRdrEvtIsGrouped(RTTRACELOGRDREVT hRdrEvt);
532
533
534	/**
535	* Returns the event descriptor associated with the given event.
536	*
537	* @returns The trace log event descriptor associated with this event.
538	* @param hRdrEvt The reader event handle.
539	*/
540	RTDECL(PCRTTRACELOGEVTDESC) RTTraceLogRdrEvtGetDesc(RTTRACELOGRDREVT hRdrEvt);
541
542
543	/**
544	* Queries an event item by its name returning the value in the supplied buffer.
545	*
546	* @returns IPRT status code.
547	* @retval VERR_NOT_FOUND if the item name was not found for the given event.
548	* @param hRdrEvt The reader event handle.
549	* @param pszName The item name to query.
550	* @param pVal The item value buffer to initialise.
551	*/
552	RTDECL(int) RTTraceLogRdrEvtQueryVal(RTTRACELOGRDREVT hRdrEvt, const char *pszName, PRTTRACELOGEVTVAL pVal);
553
554
555	/**
556	* Fills the given value array using the values from the given event.
557	*
558	* @returns IPRT status code
559	* @param hRdrEvt The reader event handle.
560	* @param idxItemStart The index of the item to start filling the value in.
561	* @param paVals Array of values to fill.
562	* @param cVals Number of values the array is able to hold.
563	* @param pcVals Where to store the number of values filled on success.
564	*/
565	RTDECL(int) RTTraceLogRdrEvtFillVals(RTTRACELOGRDREVT hRdrEvt, unsigned idxItemStart, PRTTRACELOGEVTVAL paVals,
566	unsigned cVals, unsigned *pcVals);
567
568	RT_C_DECLS_END
569
570	/** @} */
571
572	#endif
573

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