fuzz.cpp@ 79570

Last change on this file since 79570 was 77758, checked in by vboxsync, 6 years ago
Runtime/common/fuzz: Updates, add possiblity to dump the recorded target state and make it configurable what to include when comparing target states for equality
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 76.3 KB

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1	/* $Id: fuzz.cpp 77758 2019-03-18 13:17:30Z vboxsync $ */
2	/** @file
3	* IPRT - Fuzzing framework API, core.
4	*/
5
6	/*
7	* Copyright (C) 2018-2019 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	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#include <iprt/fuzz.h>
32	#include "internal/iprt.h"
33
34	#include <iprt/asm.h>
35	#include <iprt/assert.h>
36	#include <iprt/avl.h>
37	#include <iprt/critsect.h>
38	#include <iprt/ctype.h>
39	#include <iprt/dir.h>
40	#include <iprt/err.h>
41	#include <iprt/file.h>
42	#include <iprt/list.h>
43	#include <iprt/md5.h>
44	#include <iprt/mem.h>
45	#include <iprt/path.h>
46	#include <iprt/rand.h>
47	#include <iprt/semaphore.h>
48	#include <iprt/string.h>
49	#include <iprt/time.h>
50	#include <iprt/vfs.h>
51
52
53	#define RTFUZZCTX_MAGIC UINT32_C(0xdeadc0de) /** @todo */
54
55
56	/*********************************************************************************************************************************
57	* Structures and Typedefs *
58	*********************************************************************************************************************************/
59	/** Pointer to the internal fuzzer state. */
60	typedef struct RTFUZZCTXINT *PRTFUZZCTXINT;
61	/** Pointer to a fuzzed mutation. */
62	typedef struct RTFUZZMUTATION *PRTFUZZMUTATION;
63	/** Pointer to a fuzzed mutation pointer. */
64	typedef PRTFUZZMUTATION *PPRTFUZZMUTATION;
65	/** Pointer to a const mutation. */
66	typedef const struct RTFUZZMUTATION *PCRTFUZZMUTATION;
67
68
69	/**
70	* Mutator class.
71	*/
72	typedef enum RTFUZZMUTATORCLASS
73	{
74	/** Invalid class, do not use. */
75	RTFUZZMUTATORCLASS_INVALID = 0,
76	/** Mutator operates on single bits. */
77	RTFUZZMUTATORCLASS_BITS,
78	/** Mutator operates on bytes (single or multiple). */
79	RTFUZZMUTATORCLASS_BYTES,
80	/** Mutator interpretes data as integers and operates on them. */
81	RTFUZZMUTATORCLASS_INTEGERS,
82	/** Mutator uses multiple mutations to create new mutations. */
83	RTFUZZMUTATORCLASS_MUTATORS,
84	/** 32bit hack. */
85	RTFUZZMUTATORCLASS_32BIT_HACK = 0x7fffffff
86	} RTFUZZMUTATORCLASS;
87
88
89	/**
90	* Mutator preparation callback.
91	*
92	* @returns IPRT status code.
93	* @param pThis The fuzzer context instance.
94	* @param offStart Where the mutation should start.
95	* @param pMutationParent The parent mutation to start working from.
96	* @param ppMutation Where to store the created mutation on success.
97	*/
98	typedef DECLCALLBACK(int) FNRTFUZZCTXMUTATORPREP(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
99	PPRTFUZZMUTATION ppMutation);
100	/** Pointer to a mutator preparation callback. */
101	typedef FNRTFUZZCTXMUTATORPREP *PFNRTFUZZCTXMUTATORPREP;
102
103
104	/**
105	* Mutator execution callback.
106	*
107	* @returns IPRT status code.
108	* @param pThis The fuzzer context instance.
109	* @param pMutation The mutation to work on.
110	* @param pvMutation Mutation dependent data.
111	* @param pbBuf The buffer to work on.
112	* @param cbBuf Size of the remaining buffer.
113	*/
114	typedef DECLCALLBACK(int) FNRTFUZZCTXMUTATOREXEC(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
115	uint8_t *pbBuf, size_t cbBuf);
116	/** Pointer to a mutator execution callback. */
117	typedef FNRTFUZZCTXMUTATOREXEC *PFNRTFUZZCTXMUTATOREXEC;
118
119
120	/**
121	* Mutator export callback.
122	*
123	* @returns IPRT status code.
124	* @param pThis The fuzzer context instance.
125	* @param pMutation The mutation to work on.
126	* @param pvMutation Mutation dependent data.
127	* @param pfnExport The export callback.
128	* @param pvUser Opaque user data to pass to the export callback.
129	*/
130	typedef DECLCALLBACK(int) FNRTFUZZCTXMUTATOREXPORT(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
131	PFNRTFUZZCTXEXPORT pfnExport, void *pvUser);
132	/** Pointer to a mutator export callback. */
133	typedef FNRTFUZZCTXMUTATOREXPORT *PFNRTFUZZCTXMUTATOREXPORT;
134
135
136	/**
137	* Mutator import callback.
138	*
139	* @returns IPRT status code.
140	* @param pThis The fuzzer context instance.
141	* @param pMutation The mutation to work on.
142	* @param pvMutation Mutation dependent data.
143	* @param pfnExport The import callback.
144	* @param pvUser Opaque user data to pass to the import callback.
145	*/
146	typedef DECLCALLBACK(int) FNRTFUZZCTXMUTATORIMPORT(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, void *pvMutation,
147	PFNRTFUZZCTXIMPORT pfnImport, void *pvUser);
148	/** Pointer to a mutator import callback. */
149	typedef FNRTFUZZCTXMUTATORIMPORT *PFNRTFUZZCTXMUTATORIMPORT;
150
151
152	/**
153	* A fuzzing mutator descriptor.
154	*/
155	typedef struct RTFUZZMUTATOR
156	{
157	/** Id of the mutator. */
158	const char *pszId;
159	/** Mutator description. */
160	const char *pszDesc;
161	/** Mutator index. */
162	uint32_t uMutator;
163	/** Mutator class. */
164	RTFUZZMUTATORCLASS enmClass;
165	/** Additional flags for the mutator, controlling the behavior. */
166	uint64_t fFlags;
167	/** The preparation callback. */
168	PFNRTFUZZCTXMUTATORPREP pfnPrep;
169	/** The execution callback. */
170	PFNRTFUZZCTXMUTATOREXEC pfnExec;
171	/** The export callback. */
172	PFNRTFUZZCTXMUTATOREXPORT pfnExport;
173	/** The import callback. */
174	PFNRTFUZZCTXMUTATORIMPORT pfnImport;
175	} RTFUZZMUTATOR;
176	/** Pointer to a fuzzing mutator descriptor. */
177	typedef RTFUZZMUTATOR *PRTFUZZMUTATOR;
178	/** Pointer to a const fuzzing mutator descriptor. */
179	typedef const RTFUZZMUTATOR *PCRTFUZZMUTATOR;
180
181	/** The special corpus mutator. */
182	#define RTFUZZMUTATOR_ID_CORPUS UINT32_C(0xffffffff)
183
184	/** Mutator always works from the end of the buffer (no starting offset generation). */
185	#define RTFUZZMUTATOR_F_END_OF_BUF RT_BIT_64(0)
186	/** Default flags. */
187	#define RTFUZZMUTATOR_F_DEFAULT (0)
188
189
190	/**
191	* A fuzzed mutation.
192	*/
193	typedef struct RTFUZZMUTATION
194	{
195	/** The AVL tree core. */
196	AVLU64NODECORE Core;
197	/** The list node if the mutation has the mutated
198	* data allocated. */
199	RTLISTNODE NdAlloc;
200	/** Magic identifying this structure. */
201	uint32_t u32Magic;
202	/** Reference counter. */
203	volatile uint32_t cRefs;
204	/** The fuzzer this mutation belongs to. */
205	PRTFUZZCTXINT pFuzzer;
206	/** Parent mutation (no reference is held), NULL means root or original data. */
207	PRTFUZZMUTATION pMutationParent;
208	/** Mutation level. */
209	uint32_t iLvl;
210	/** The mutator causing this mutation, NULL if original input data. */
211	PCRTFUZZMUTATOR pMutator;
212	/** Byte offset where the mutation starts. */
213	uint64_t offMutation;
214	/** Size of the generated input data in bytes after the mutation was applied. */
215	size_t cbInput;
216	/** Size of the mutation dependent data. */
217	size_t cbMutation;
218	/** Size allocated for the input. */
219	size_t cbAlloc;
220	/** Pointer to the input data if created. */
221	void *pvInput;
222	/** Flag whether the mutation is contained in the tree of the context. */
223	bool fInTree;
224	/** Flag whether the mutation input data is cached. */
225	bool fCached;
226	/** Mutation dependent data, variable in size. */
227	uint8_t abMutation[1];
228	} RTFUZZMUTATION;
229
230
231	/**
232	* A fuzzing input seed.
233	*/
234	typedef struct RTFUZZINPUTINT
235	{
236	/** Magic identifying this structure. */
237	uint32_t u32Magic;
238	/** Reference counter. */
239	volatile uint32_t cRefs;
240	/** The fuzzer this input belongs to. */
241	PRTFUZZCTXINT pFuzzer;
242	/** The top mutation to work from (reference held). */
243	PRTFUZZMUTATION pMutationTop;
244	/** Fuzzer context type dependent data. */
245	union
246	{
247	/** Blob data. */
248	struct
249	{
250	/** Pointer to the input data if created. */
251	void *pvInput;
252	} Blob;
253	/** Stream state. */
254	struct
255	{
256	/** Number of bytes seen so far. */
257	size_t cbSeen;
258	} Stream;
259	} u;
260	} RTFUZZINPUTINT;
261	/** Pointer to the internal input state. */
262	typedef RTFUZZINPUTINT *PRTFUZZINPUTINT;
263	/** Pointer to an internal input state pointer. */
264	typedef PRTFUZZINPUTINT *PPRTFUZZINPUTINT;
265
266
267	/**
268	* The fuzzer state.
269	*/
270	typedef struct RTFUZZCTXINT
271	{
272	/** Magic value for identification. */
273	uint32_t u32Magic;
274	/** Reference counter. */
275	volatile uint32_t cRefs;
276	/** The random number generator. */
277	RTRAND hRand;
278	/** Fuzzing context type. */
279	RTFUZZCTXTYPE enmType;
280	/** Semaphore protecting the mutations tree. */
281	RTSEMRW hSemRwMutations;
282	/** The AVL tree for indexing the mutations (keyed by counter). */
283	AVLU64TREE TreeMutations;
284	/** Number of inputs currently in the tree. */
285	volatile uint64_t cMutations;
286	/** The maximum size of one input seed to generate. */
287	size_t cbInputMax;
288	/** Behavioral flags. */
289	uint32_t fFlagsBehavioral;
290	/** Number of enabled mutators. */
291	uint32_t cMutators;
292	/** Pointer to the mutator descriptors. */
293	PRTFUZZMUTATOR paMutators;
294	/** Maximum amount of bytes of mutated inputs to cache. */
295	size_t cbMutationsAllocMax;
296	/** Current amount of bytes of cached mutated inputs. */
297	size_t cbMutationsAlloc;
298	/** List of mutators having data allocated currently. */
299	RTLISTANCHOR LstMutationsAlloc;
300	/** Critical section protecting the allocation list. */
301	RTCRITSECT CritSectAlloc;
302	/** Total number of bytes of memory currently allocated in total for this context. */
303	volatile size_t cbMemTotal;
304	} RTFUZZCTXINT;
305
306
307	/**
308	* The fuzzer state to be exported - all members are stored in little endian form.
309	*/
310	typedef struct RTFUZZCTXSTATE
311	{
312	/** Magic value for identification. */
313	uint32_t u32Magic;
314	/** Context type. */
315	uint32_t uCtxType;
316	/** Size of the PRNG state following in bytes. */
317	uint32_t cbPrng;
318	/** Number of mutator descriptors following. */
319	uint32_t cMutators;
320	/** Number of mutation descriptors following. */
321	uint32_t cMutations;
322	/** Behavioral flags. */
323	uint32_t fFlagsBehavioral;
324	/** Maximum input size to generate. */
325	uint64_t cbInputMax;
326	} RTFUZZCTXSTATE;
327	/** Pointer to a fuzzing context state. */
328	typedef RTFUZZCTXSTATE *PRTFUZZCTXSTATE;
329
330	/** BLOB context type. */
331	#define RTFUZZCTX_STATE_TYPE_BLOB UINT32_C(0)
332	/** Stream context type. */
333	#define RTFUZZCTX_STATE_TYPE_STREAM UINT32_C(1)
334
335
336	/**
337	* The fuzzer mutation state to be exported - all members are stored in little endian form.
338	*/
339	typedef struct RTFUZZMUTATIONSTATE
340	{
341	/** The mutation identifier. */
342	uint64_t u64Id;
343	/** The mutation identifier of the parent, 0 for no parent. */
344	uint64_t u64IdParent;
345	/** The byte offset where the mutation starts. */
346	uint64_t u64OffMutation;
347	/** Size of input data after mutation was applied. */
348	uint64_t cbInput;
349	/** Size of mutation dependent data following. */
350	uint64_t cbMutation;
351	/** The mutator ID. */
352	uint32_t u32IdMutator;
353	/** The mutation level. */
354	uint32_t iLvl;
355	/** Magic value for identification. */
356	uint32_t u32Magic;
357	} RTFUZZMUTATIONSTATE;
358
359
360	/**
361	* Fuzzing context memory header.
362	*/
363	typedef struct RTFUZZMEMHDR
364	{
365	/** Size of the memory area following. */
366	size_t cb;
367	#if HC_ARCH_BITS == 32
368	/** Some padding. */
369	uint32_t uPadding0;
370	#elif HC_ARCH_BITS == 64
371	#else
372	/** Some padding. */
373	uint64_t uPadding0;
374	# error "Port me"
375	#endif
376	} RTFUZZMEMHDR;
377	/** Pointer to a memory header. */
378	typedef RTFUZZMEMHDR *PRTFUZZMEMHDR;
379
380
381	/**
382	* Fuzzing context export AVL arguments.
383	*/
384	typedef struct RTFUZZEXPORTARGS
385	{
386	/** Pointer to the export callback. */
387	PFNRTFUZZCTXEXPORT pfnExport;
388	/** Opaque user data to pass to the callback. */
389	void *pvUser;
390	} RTFUZZEXPORTARGS;
391	/** Pointer to the export arguments. */
392	typedef RTFUZZEXPORTARGS *PRTFUZZEXPORTARGS;
393	/** Pointer to the constant export arguments. */
394	typedef const RTFUZZEXPORTARGS *PCRTFUZZEXPORTARGS;
395
396
397	/**
398	* Integer replacing mutator additional data.
399	*/
400	typedef struct RTFUZZMUTATORINTEGER
401	{
402	/** The integer class. */
403	uint8_t uIntClass;
404	/** Flag whether to do a byte swap. */
405	bool fByteSwap;
406	/** The index into the class specific array. */
407	uint16_t idxInt;
408	} RTFUZZMUTATORINTEGER;
409	/** Pointer to additional integer replacing mutator data. */
410	typedef RTFUZZMUTATORINTEGER *PRTFUZZMUTATORINTEGER;
411	/** Pointer to constant additional integer replacing mutator data. */
412	typedef const RTFUZZMUTATORINTEGER *PCRTFUZZMUTATORINTEGER;
413
414
415	/*********************************************************************************************************************************
416	* Internal Functions *
417	*********************************************************************************************************************************/
418	static DECLCALLBACK(int) rtFuzzCtxMutatorBitFlipPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
419	PPRTFUZZMUTATION ppMutation);
420	static DECLCALLBACK(int) rtFuzzCtxMutatorByteReplacePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
421	PPRTFUZZMUTATION ppMutation);
422	static DECLCALLBACK(int) rtFuzzCtxMutatorByteInsertPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
423	PPRTFUZZMUTATION ppMutation);
424	static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceInsertAppendPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
425	PPRTFUZZMUTATION ppMutation);
426	static DECLCALLBACK(int) rtFuzzCtxMutatorByteDeletePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
427	PPRTFUZZMUTATION ppMutation);
428	static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceDeletePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
429	PPRTFUZZMUTATION ppMutation);
430	static DECLCALLBACK(int) rtFuzzCtxMutatorIntegerReplacePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
431	PPRTFUZZMUTATION ppMutation);
432	static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
433	PPRTFUZZMUTATION ppMutation);
434
435	static DECLCALLBACK(int) rtFuzzCtxMutatorCorpusExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
436	uint8_t *pbBuf, size_t cbBuf);
437	static DECLCALLBACK(int) rtFuzzCtxMutatorBitFlipExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
438	uint8_t *pbBuf, size_t cbBuf);
439	static DECLCALLBACK(int) rtFuzzCtxMutatorByteReplaceExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
440	uint8_t *pbBuf, size_t cbBuf);
441	static DECLCALLBACK(int) rtFuzzCtxMutatorByteInsertExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
442	uint8_t *pbBuf, size_t cbBuf);
443	static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceInsertAppendExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
444	uint8_t *pbBuf, size_t cbBuf);
445	static DECLCALLBACK(int) rtFuzzCtxMutatorByteDeleteExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
446	uint8_t *pbBuf, size_t cbBuf);
447	static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceDeleteExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
448	uint8_t *pbBuf, size_t cbBuf);
449	static DECLCALLBACK(int) rtFuzzCtxMutatorIntegerReplaceExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
450	uint8_t *pbBuf, size_t cbBuf);
451	static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
452	uint8_t *pbBuf, size_t cbBuf);
453
454	static DECLCALLBACK(int) rtFuzzCtxMutatorExportDefault(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
455	PFNRTFUZZCTXEXPORT pfnExport, void *pvUser);
456	static DECLCALLBACK(int) rtFuzzCtxMutatorImportDefault(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, void *pvMutation,
457	PFNRTFUZZCTXIMPORT pfnImport, void *pvUser);
458
459	static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverExport(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
460	PFNRTFUZZCTXEXPORT pfnExport, void *pvUser);
461	static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverImport(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, void *pvMutation,
462	PFNRTFUZZCTXIMPORT pfnImport, void *pvUser);
463
464
465	/*********************************************************************************************************************************
466	* Global Variables *
467	*********************************************************************************************************************************/
468
469	/** Signed 8bit interesting values. */
470	static int8_t s_ai8Interesting[] = { INT8_MIN, INT8_MIN + 1, -1, 0, 1, INT8_MAX - 1, INT8_MAX };
471	/** Unsigned 8bit interesting values. */
472	static uint8_t s_au8Interesting[] = { 0, 1, UINT8_MAX - 1, UINT8_MAX };
473	/** Signed 16bit interesting values. */
474	static int16_t s_ai16Interesting[] = { INT16_MIN, INT16_MIN + 1, -1, 0, 1, INT16_MAX - 1, INT16_MAX };
475	/** Unsigned 16bit interesting values. */
476	static uint16_t s_au16Interesting[] = { 0, 1, UINT16_MAX - 1, UINT16_MAX };
477	/** Signed 32bit interesting values. */
478	static int32_t s_ai32Interesting[] = { INT32_MIN, INT32_MIN + 1, -1, 0, 1, INT32_MAX - 1, INT32_MAX };
479	/** Unsigned 32bit interesting values. */
480	static uint32_t s_au32Interesting[] = { 0, 1, UINT32_MAX - 1, UINT32_MAX };
481	/** Signed 64bit interesting values. */
482	static int64_t s_ai64Interesting[] = { INT64_MIN, INT64_MIN + 1, -1, 0, 1, INT64_MAX - 1, INT64_MAX };
483	/** Unsigned 64bit interesting values. */
484	static uint64_t s_au64Interesting[] = { 0, 1, UINT64_MAX - 1, UINT64_MAX };
485
486
487	/**
488	* The special corpus mutator for the original data.
489	*/
490	static RTFUZZMUTATOR const g_MutatorCorpus =
491	{
492	/** pszId */
493	"Corpus",
494	/** pszDesc */
495	"Special mutator, which is assigned to the initial corpus",
496	/** uMutator. */
497	RTFUZZMUTATOR_ID_CORPUS,
498	/** enmClass. */
499	RTFUZZMUTATORCLASS_BYTES,
500	/** fFlags */
501	RTFUZZMUTATOR_F_DEFAULT,
502	/** pfnPrep */
503	NULL,
504	/** pfnExec */
505	rtFuzzCtxMutatorCorpusExec,
506	/** pfnExport */
507	rtFuzzCtxMutatorExportDefault,
508	/** pfnImport */
509	rtFuzzCtxMutatorImportDefault
510	};
511
512	/**
513	* Array of all available mutators.
514	*/
515	static RTFUZZMUTATOR const g_aMutators[] =
516	{
517	/* pszId pszDesc uMutator enmClass fFlags pfnPrep pfnExec pfnExport pfnImport */
518	{ "BitFlip", "Flips a single bit in the input", 0, RTFUZZMUTATORCLASS_BITS, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorBitFlipPrep, rtFuzzCtxMutatorBitFlipExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault },
519	{ "ByteReplace", "Replaces a single byte in the input", 1, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorByteReplacePrep, rtFuzzCtxMutatorByteReplaceExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault },
520	{ "ByteInsert", "Inserts a single byte sequence into the input", 2, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorByteInsertPrep, rtFuzzCtxMutatorByteInsertExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault },
521	{ "ByteSeqIns", "Inserts a byte sequence in the input", 3, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorByteSequenceInsertAppendPrep, rtFuzzCtxMutatorByteSequenceInsertAppendExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault },
522	{ "ByteSeqApp", "Appends a byte sequence to the input", 4, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_END_OF_BUF, rtFuzzCtxMutatorByteSequenceInsertAppendPrep, rtFuzzCtxMutatorByteSequenceInsertAppendExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault },
523	{ "ByteDelete", "Deletes a single byte sequence from the input", 5, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorByteDeletePrep, rtFuzzCtxMutatorByteDeleteExec, NULL, NULL },
524	{ "ByteSeqDel", "Deletes a byte sequence from the input", 6, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorByteSequenceDeletePrep, rtFuzzCtxMutatorByteSequenceDeleteExec, NULL, NULL },
525	{ "IntReplace", "Replaces a possible integer with an interesting one", 7, RTFUZZMUTATORCLASS_INTEGERS, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorIntegerReplacePrep, rtFuzzCtxMutatorIntegerReplaceExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault },
526	{ "MutCrossover", "Creates a crossover of two other mutations", 8, RTFUZZMUTATORCLASS_MUTATORS, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorCrossoverPrep, rtFuzzCtxMutatorCrossoverExec, rtFuzzCtxMutatorCrossoverExport, rtFuzzCtxMutatorCrossoverImport }
527	};
528
529
530	/**
531	* Allocates the given number of bytes.
532	*
533	* @returns Pointer to the allocated memory
534	* @param pThis The fuzzer context instance.
535	* @param cb How much to allocate.
536	*/
537	static void *rtFuzzCtxMemoryAlloc(PRTFUZZCTXINT pThis, size_t cb)
538	{
539	AssertReturn(cb > 0, NULL);
540
541	PRTFUZZMEMHDR pMemHdr = (PRTFUZZMEMHDR)RTMemAllocZ(cb + sizeof(RTFUZZMEMHDR));
542	if (RT_LIKELY(pMemHdr))
543	{
544	pMemHdr->cb = cb;
545	size_t cbIgn = ASMAtomicAddZ(&pThis->cbMemTotal, cb + sizeof(RTFUZZMEMHDR)); RT_NOREF(cbIgn);
546	return pMemHdr + 1;
547	}
548
549	return NULL;
550	}
551
552
553	/**
554	* Frees the given memory.
555	*
556	* @returns nothing.
557	* @param pThis The fuzzer context instance.
558	* @param pv Pointer to the memory area to free.
559	*/
560	static void rtFuzzCtxMemoryFree(PRTFUZZCTXINT pThis, void *pv)
561	{
562	AssertReturnVoid(pv != NULL);
563	PRTFUZZMEMHDR pMemHdr = ((PRTFUZZMEMHDR)pv) - 1;
564
565	size_t cbIgn = ASMAtomicSubZ(&pThis->cbMemTotal, pMemHdr->cb + sizeof(RTFUZZMEMHDR)); RT_NOREF(cbIgn);
566	RTMemFree(pMemHdr);
567	}
568
569
570	/**
571	* Frees the cached inputs until the given amount is free.
572	*
573	* @returns Whether the amount of memory is free.
574	* @param pThis The fuzzer context instance.
575	* @param cb How many bytes to reclaim
576	*/
577	static bool rtFuzzCtxMutationAllocReclaim(PRTFUZZCTXINT pThis, size_t cb)
578	{
579	while ( !RTListIsEmpty(&pThis->LstMutationsAlloc)
580	&& pThis->cbMutationsAlloc + cb > pThis->cbMutationsAllocMax)
581	{
582	PRTFUZZMUTATION pMutation = RTListGetLast(&pThis->LstMutationsAlloc, RTFUZZMUTATION, NdAlloc);
583	AssertPtr(pMutation);
584	AssertPtr(pMutation->pvInput);
585
586	rtFuzzCtxMemoryFree(pThis, pMutation->pvInput);
587	pThis->cbMutationsAlloc -= pMutation->cbAlloc;
588	pMutation->pvInput = NULL;
589	pMutation->cbAlloc = 0;
590	pMutation->fCached = false;
591	RTListNodeRemove(&pMutation->NdAlloc);
592	}
593
594	return pThis->cbMutationsAlloc + cb <= pThis->cbMutationsAllocMax;
595	}
596
597
598	/**
599	* Updates the cache status of the given mutation.
600	*
601	* @returns nothing.
602	* @param pThis The fuzzer context instance.
603	* @param pMutation The mutation to update.
604	*/
605	static void rtFuzzCtxMutationMaybeEnterCache(PRTFUZZCTXINT pThis, PRTFUZZMUTATION pMutation)
606	{
607	RTCritSectEnter(&pThis->CritSectAlloc);
608
609	/* Initial corpus mutations are not freed. */
610	if ( pMutation->pvInput
611	&& pMutation->pMutator != &g_MutatorCorpus)
612	{
613	Assert(!pMutation->fCached);
614
615	if (rtFuzzCtxMutationAllocReclaim(pThis, pMutation->cbAlloc))
616	{
617	RTListPrepend(&pThis->LstMutationsAlloc, &pMutation->NdAlloc);
618	pThis->cbMutationsAlloc += pMutation->cbAlloc;
619	pMutation->fCached = true;
620	}
621	else
622	{
623	rtFuzzCtxMemoryFree(pThis, pMutation->pvInput);
624	pMutation->pvInput = NULL;
625	pMutation->cbAlloc = 0;
626	pMutation->fCached = false;
627	}
628	}
629	RTCritSectLeave(&pThis->CritSectAlloc);
630	}
631
632
633	/**
634	* Removes a cached mutation from the cache.
635	*
636	* @returns nothing.
637	* @param pThis The fuzzer context instance.
638	* @param pMutation The mutation to remove.
639	*/
640	static void rtFuzzCtxMutationCacheRemove(PRTFUZZCTXINT pThis, PRTFUZZMUTATION pMutation)
641	{
642	RTCritSectEnter(&pThis->CritSectAlloc);
643	if (pMutation->fCached)
644	{
645	RTListNodeRemove(&pMutation->NdAlloc);
646	pThis->cbMutationsAlloc -= pMutation->cbAlloc;
647	pMutation->fCached = false;
648	}
649	RTCritSectLeave(&pThis->CritSectAlloc);
650	}
651
652
653	/**
654	* Destroys the given mutation.
655	*
656	* @returns nothing.
657	* @param pMutation The mutation to destroy.
658	*/
659	static void rtFuzzMutationDestroy(PRTFUZZMUTATION pMutation)
660	{
661	if (pMutation->pvInput)
662	{
663	rtFuzzCtxMemoryFree(pMutation->pFuzzer, pMutation->pvInput);
664	if (pMutation->fCached)
665	{
666	RTCritSectEnter(&pMutation->pFuzzer->CritSectAlloc);
667	RTListNodeRemove(&pMutation->NdAlloc);
668	pMutation->pFuzzer->cbMutationsAlloc -= pMutation->cbAlloc;
669	RTCritSectLeave(&pMutation->pFuzzer->CritSectAlloc);
670	}
671	pMutation->pvInput = NULL;
672	pMutation->cbAlloc = 0;
673	pMutation->fCached = false;
674	}
675	rtFuzzCtxMemoryFree(pMutation->pFuzzer, pMutation);
676	}
677
678
679	/**
680	* Retains an external reference to the given mutation.
681	*
682	* @returns New reference count on success.
683	* @param pMutation The mutation to retain.
684	*/
685	static uint32_t rtFuzzMutationRetain(PRTFUZZMUTATION pMutation)
686	{
687	uint32_t cRefs = ASMAtomicIncU32(&pMutation->cRefs);
688	AssertMsg( ( cRefs > 1
689	\|\| pMutation->fInTree)
690	&& cRefs < _1M, ("%#x %p\n", cRefs, pMutation));
691
692	if (cRefs == 1)
693	rtFuzzCtxMutationCacheRemove(pMutation->pFuzzer, pMutation);
694	return cRefs;
695	}
696
697
698	/**
699	* Releases an external reference from the given mutation.
700	*
701	* @returns New reference count on success.
702	* @param pMutation The mutation to retain.
703	*/
704	static uint32_t rtFuzzMutationRelease(PRTFUZZMUTATION pMutation)
705	{
706	uint32_t cRefs = ASMAtomicDecU32(&pMutation->cRefs);
707	AssertMsg(cRefs < _1M, ("%#x %p\n", cRefs, pMutation));
708
709	if (cRefs == 0)
710	{
711	if (!pMutation->fInTree)
712	rtFuzzMutationDestroy(pMutation);
713	else
714	rtFuzzCtxMutationMaybeEnterCache(pMutation->pFuzzer, pMutation);
715	}
716
717	return cRefs;
718	}
719
720
721	/**
722	* Adds the given mutation to the corpus of the given fuzzer context.
723	*
724	* @returns IPRT status code.
725	* @param pThis The fuzzer context instance.
726	* @param pMutation The mutation to add.
727	*/
728	static int rtFuzzCtxMutationAdd(PRTFUZZCTXINT pThis, PRTFUZZMUTATION pMutation)
729	{
730	int rc = VINF_SUCCESS;
731
732	pMutation->Core.Key = ASMAtomicIncU64(&pThis->cMutations);
733	rc = RTSemRWRequestWrite(pThis->hSemRwMutations, RT_INDEFINITE_WAIT);
734	AssertRC(rc); RT_NOREF(rc);
735	bool fIns = RTAvlU64Insert(&pThis->TreeMutations, &pMutation->Core);
736	Assert(fIns); RT_NOREF(fIns);
737	rc = RTSemRWReleaseWrite(pThis->hSemRwMutations);
738	AssertRC(rc); RT_NOREF(rc);
739
740	pMutation->fInTree = true;
741	return rc;
742	}
743
744
745	/**
746	* Locates the mutation with the given key.
747	*
748	* @returns Pointer to the mutation if found or NULL otherwise.
749	* @param pThis The fuzzer context instance.
750	* @param uKey The key to locate.
751	*/
752	static PRTFUZZMUTATION rtFuzzCtxMutationLocate(PRTFUZZCTXINT pThis, uint64_t uKey)
753	{
754	int rc = RTSemRWRequestRead(pThis->hSemRwMutations, RT_INDEFINITE_WAIT);
755	AssertRC(rc); RT_NOREF(rc);
756
757	/*
758	* Using best fit getter here as there might be a racing mutation insertion and the mutation counter has increased
759	* already but the mutation is not yet in the tree.
760	*/
761	PRTFUZZMUTATION pMutation = (PRTFUZZMUTATION)RTAvlU64GetBestFit(&pThis->TreeMutations, uKey, false /fAbove/);
762	if (RT_LIKELY(pMutation))
763	rtFuzzMutationRetain(pMutation);
764
765	rc = RTSemRWReleaseRead(pThis->hSemRwMutations);
766	AssertRC(rc); RT_NOREF(rc);
767
768	return pMutation;
769	}
770
771
772	/**
773	* Returns a random mutation from the corpus of the given fuzzer context.
774	*
775	* @returns Pointer to a randomly picked mutation (reference count is increased).
776	* @param pThis The fuzzer context instance.
777	*/
778	static PRTFUZZMUTATION rtFuzzCtxMutationPickRnd(PRTFUZZCTXINT pThis)
779	{
780	uint64_t idxMutation = RTRandAdvU64Ex(pThis->hRand, 1, ASMAtomicReadU64(&pThis->cMutations));
781	return rtFuzzCtxMutationLocate(pThis, idxMutation);
782	}
783
784
785	/**
786	* Creates a new mutation capable of holding the additional number of bytes.
787	*
788	* @returns Pointer to the newly created mutation or NULL if out of memory.
789	* @param pThis The fuzzer context instance.
790	* @param offMutation The starting offset for the mutation.
791	* @param pMutationParent The parent mutation, can be NULL.
792	* @param cbAdditional Additional number of bytes to allocate after the core structure.
793	* @param ppvMutation Where to store the pointer to the mutation dependent data on success.
794	*/
795	static PRTFUZZMUTATION rtFuzzMutationCreate(PRTFUZZCTXINT pThis, uint64_t offMutation, PRTFUZZMUTATION pMutationParent,
796	size_t cbAdditional, void **ppvMutation)
797	{
798	PRTFUZZMUTATION pMutation = (PRTFUZZMUTATION)rtFuzzCtxMemoryAlloc(pThis, sizeof(RTFUZZMUTATION) + cbAdditional);
799	if (RT_LIKELY(pMutation))
800	{
801	pMutation->u32Magic = 0; /** @todo */
802	pMutation->pFuzzer = pThis;
803	pMutation->cRefs = 1;
804	pMutation->iLvl = 0;
805	pMutation->offMutation = offMutation;
806	pMutation->pMutationParent = pMutationParent;
807	pMutation->cbMutation = cbAdditional;
808	pMutation->fInTree = false;
809	pMutation->fCached = false;
810	pMutation->pvInput = NULL;
811	pMutation->cbInput = 0;
812	pMutation->cbAlloc = 0;
813
814	if (pMutationParent)
815	pMutation->iLvl = pMutationParent->iLvl + 1;
816	if (ppvMutation)
817	*ppvMutation = &pMutation->abMutation[0];
818	}
819
820	return pMutation;
821	}
822
823
824	/**
825	* Destroys the given fuzzer context freeing all allocated resources.
826	*
827	* @returns nothing.
828	* @param pThis The fuzzer context instance.
829	*/
830	static void rtFuzzCtxDestroy(PRTFUZZCTXINT pThis)
831	{
832	RT_NOREF(pThis);
833	}
834
835
836	/**
837	* Creates the final input data applying all accumulated mutations.
838	*
839	* @returns IPRT status code.
840	* @param pMutation The mutation to finalize.
841	*/
842	static int rtFuzzMutationDataFinalize(PRTFUZZMUTATION pMutation)
843	{
844	if (pMutation->pvInput)
845	return VINF_SUCCESS;
846
847	/* Traverse the mutations top to bottom and insert into the array. */
848	int rc = VINF_SUCCESS;
849	uint32_t idx = pMutation->iLvl + 1;
850	PRTFUZZMUTATION papMutations = (PRTFUZZMUTATION )RTMemTmpAlloc(idx * sizeof(PCRTFUZZMUTATION));
851	if (RT_LIKELY(papMutations))
852	{
853	PRTFUZZMUTATION pMutationCur = pMutation;
854	size_t cbAlloc = 0;
855
856	/*
857	* As soon as a mutation with allocated input data is encountered the insertion is
858	* stopped as it contains all necessary mutated inputs we can start from.
859	*/
860	while (idx > 0)
861	{
862	rtFuzzMutationRetain(pMutationCur);
863	papMutations[idx - 1] = pMutationCur;
864	cbAlloc = RT_MAX(cbAlloc, pMutationCur->cbInput);
865	if (pMutationCur->pvInput)
866	{
867	idx--;
868	break;
869	}
870	pMutationCur = pMutationCur->pMutationParent;
871	idx--;
872	}
873
874	pMutation->cbAlloc = cbAlloc;
875	uint8_t pbBuf = (uint8_t )rtFuzzCtxMemoryAlloc(pMutation->pFuzzer, cbAlloc);
876	if (RT_LIKELY(pbBuf))
877	{
878	pMutation->pvInput = pbBuf;
879
880	/* Copy the initial input data. */
881	size_t cbInputNow = papMutations[idx]->cbInput;
882	memcpy(pbBuf, papMutations[idx]->pvInput, cbInputNow);
883	rtFuzzMutationRelease(papMutations[idx]);
884
885	for (uint32_t i = idx + 1; i < pMutation->iLvl + 1; i++)
886	{
887	PRTFUZZMUTATION pCur = papMutations[i];
888	pCur->pMutator->pfnExec(pCur->pFuzzer, pCur, (void *)&pCur->abMutation[0],
889	pbBuf + pCur->offMutation,
890	cbInputNow - pCur->offMutation);
891
892	cbInputNow = pCur->cbInput;
893	rtFuzzMutationRelease(pCur);
894	}
895
896	Assert(cbInputNow == pMutation->cbInput);
897	}
898	else
899	rc = VERR_NO_MEMORY;
900
901	RTMemTmpFree(papMutations);
902	}
903	else
904	rc = VERR_NO_MEMORY;
905
906	return rc;
907	}
908
909
910	/**
911	* Default mutator export callback (just writing the raw data).
912	*/
913	static DECLCALLBACK(int) rtFuzzCtxMutatorExportDefault(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
914	PFNRTFUZZCTXEXPORT pfnExport, void *pvUser)
915	{
916	return pfnExport(pThis, pvMutation, pMutation->cbMutation, pvUser);
917	}
918
919
920	/**
921	* Default mutator import callback (just reading the raw data).
922	*/
923	static DECLCALLBACK(int) rtFuzzCtxMutatorImportDefault(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, void *pvMutation,
924	PFNRTFUZZCTXIMPORT pfnImport, void *pvUser)
925	{
926	return pfnImport(pThis, pvMutation, pMutation->cbMutation, NULL, pvUser);
927	}
928
929
930	static DECLCALLBACK(int) rtFuzzCtxMutatorCorpusExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
931	uint8_t *pbBuf, size_t cbBuf)
932	{
933	RT_NOREF(pThis, cbBuf, pvMutation);
934	memcpy(pbBuf, pvMutation, pMutation->cbInput);
935	return VINF_SUCCESS;
936	}
937
938
939	/**
940	* Mutator callback - flips a single bit in the input.
941	*/
942	static DECLCALLBACK(int) rtFuzzCtxMutatorBitFlipPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
943	PPRTFUZZMUTATION ppMutation)
944	{
945	int rc = VINF_SUCCESS;
946	uint8_t *pidxBitFlip = 0;
947	PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, sizeof(pidxBitFlip), (void *)&pidxBitFlip);
948	if (RT_LIKELY(pMutation))
949	{
950	pMutation->cbInput = pMutationParent->cbInput; /* Bit flips don't change the input size. */
951	pidxBitFlip = (uint8_t)RTRandAdvU32Ex(pThis->hRand, 0, sizeof(uint8_t) 8 - 1);
952	*ppMutation = pMutation;
953	}
954	else
955	rc = VERR_NO_MEMORY;
956
957	return rc;
958	}
959
960
961	static DECLCALLBACK(int) rtFuzzCtxMutatorBitFlipExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
962	uint8_t *pbBuf, size_t cbBuf)
963	{
964	RT_NOREF(pThis, cbBuf, pMutation);
965	uint8_t idxBitFlip = (uint8_t )pvMutation;
966	ASMBitToggle(pbBuf, idxBitFlip);
967	return VINF_SUCCESS;
968	}
969
970
971	/**
972	* Mutator callback - replaces a single byte in the input.
973	*/
974	static DECLCALLBACK(int) rtFuzzCtxMutatorByteReplacePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
975	PPRTFUZZMUTATION ppMutation)
976	{
977	int rc = VINF_SUCCESS;
978	uint8_t *pbReplace = 0;
979	PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, sizeof(pbReplace), (void *)&pbReplace);
980	if (RT_LIKELY(pMutation))
981	{
982	pMutation->cbInput = pMutationParent->cbInput; /* Byte replacements don't change the input size. */
983	RTRandAdvBytes(pThis->hRand, pbReplace, 1); /** @todo Filter out same values. */
984	*ppMutation = pMutation;
985	}
986	else
987	rc = VERR_NO_MEMORY;
988
989	return rc;
990	}
991
992
993	static DECLCALLBACK(int) rtFuzzCtxMutatorByteReplaceExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
994	uint8_t *pbBuf, size_t cbBuf)
995	{
996	RT_NOREF(pThis, cbBuf, pMutation);
997	uint8_t bReplace = (uint8_t )pvMutation;
998	*pbBuf = bReplace;
999	return VINF_SUCCESS;
1000	}
1001
1002
1003	/**
1004	* Mutator callback - inserts a single byte into the input.
1005	*/
1006	static DECLCALLBACK(int) rtFuzzCtxMutatorByteInsertPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
1007	PPRTFUZZMUTATION ppMutation)
1008	{
1009	int rc = VINF_SUCCESS;
1010	uint8_t *pbInsert = 0;
1011	if (pMutationParent->cbInput < pThis->cbInputMax)
1012	{
1013	PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, 1 /cbAdditional/, (void **)&pbInsert);
1014	if (RT_LIKELY(pMutation))
1015	{
1016	pMutation->cbInput = pMutationParent->cbInput + 1;
1017	RTRandAdvBytes(pThis->hRand, pbInsert, 1);
1018	*ppMutation = pMutation;
1019	}
1020	else
1021	rc = VERR_NO_MEMORY;
1022	}
1023
1024	return rc;
1025	}
1026
1027
1028	static DECLCALLBACK(int) rtFuzzCtxMutatorByteInsertExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
1029	uint8_t *pbBuf, size_t cbBuf)
1030	{
1031	RT_NOREF(pThis, pMutation, pvMutation);
1032
1033	/* Just move the residual data one byte to the back. */
1034	memmove(pbBuf + 1, pbBuf, cbBuf);
1035	pbBuf = (uint8_t *)pvMutation;
1036	return VINF_SUCCESS;
1037	}
1038
1039
1040	/**
1041	* Mutator callback - inserts a byte sequence into the input.
1042	*/
1043	static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceInsertAppendPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
1044	PPRTFUZZMUTATION ppMutation)
1045	{
1046	int rc = VINF_SUCCESS;
1047	if (pMutationParent->cbInput < pThis->cbInputMax)
1048	{
1049	size_t cbInputMutated = (size_t)RTRandAdvU64Ex(pThis->hRand, pMutationParent->cbInput + 1, pThis->cbInputMax);
1050	size_t cbInsert = cbInputMutated - pMutationParent->cbInput;
1051	uint8_t *pbAdd = NULL;
1052
1053	PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, cbInsert, (void **)&pbAdd);
1054	if (RT_LIKELY(pMutation))
1055	{
1056	pMutation->cbInput = cbInputMutated;
1057	RTRandAdvBytes(pThis->hRand, pbAdd, cbInsert);
1058	*ppMutation = pMutation;
1059	}
1060	else
1061	rc = VERR_NO_MEMORY;
1062	}
1063
1064	return rc;
1065	}
1066
1067
1068	static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceInsertAppendExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
1069	uint8_t *pbBuf, size_t cbBuf)
1070	{
1071	RT_NOREF(pThis);
1072	size_t cbInsert = pMutation->cbInput - pMutation->pMutationParent->cbInput;
1073
1074	/* Move any remaining data to the end. */
1075	if (cbBuf)
1076	memmove(pbBuf + cbInsert, pbBuf, cbBuf);
1077
1078	memcpy(pbBuf, pvMutation, cbInsert);
1079	return VINF_SUCCESS;
1080	}
1081
1082
1083	/**
1084	* Mutator callback - deletes a single byte in the input.
1085	*/
1086	static DECLCALLBACK(int) rtFuzzCtxMutatorByteDeletePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
1087	PPRTFUZZMUTATION ppMutation)
1088	{
1089	int rc = VINF_SUCCESS;
1090	if (pMutationParent->cbInput - offStart >= 1)
1091	{
1092	PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, 0 /cbAdditional/, NULL);
1093	if (RT_LIKELY(pMutation))
1094	{
1095	pMutation->cbInput = pMutationParent->cbInput - 1;
1096	*ppMutation = pMutation;
1097	}
1098	else
1099	rc = VERR_NO_MEMORY;
1100	}
1101
1102	return rc;
1103	}
1104
1105
1106	static DECLCALLBACK(int) rtFuzzCtxMutatorByteDeleteExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
1107	uint8_t *pbBuf, size_t cbBuf)
1108	{
1109	RT_NOREF(pThis, pMutation, pvMutation);
1110
1111	/* Just move the residual data to the front. */
1112	memmove(pbBuf, pbBuf + 1, cbBuf - 1);
1113	return VINF_SUCCESS;
1114	}
1115
1116
1117	/**
1118	* Mutator callback - deletes a byte sequence in the input.
1119	*/
1120	static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceDeletePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
1121	PPRTFUZZMUTATION ppMutation)
1122	{
1123	int rc = VINF_SUCCESS;
1124	if ( pMutationParent->cbInput > offStart
1125	&& pMutationParent->cbInput > 1)
1126	{
1127	size_t cbInputMutated = (size_t)RTRandAdvU64Ex(pThis->hRand, offStart, pMutationParent->cbInput - 1);
1128
1129	PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, 0 /cbAdditional/, NULL);
1130	if (RT_LIKELY(pMutation))
1131	{
1132	pMutation->cbInput = cbInputMutated;
1133	*ppMutation = pMutation;
1134	}
1135	else
1136	rc = VERR_NO_MEMORY;
1137	}
1138
1139	return rc;
1140	}
1141
1142
1143	static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceDeleteExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
1144	uint8_t *pbBuf, size_t cbBuf)
1145	{
1146	RT_NOREF(pThis, pvMutation);
1147	Assert(pMutation->pMutationParent->cbInput > pMutation->cbInput);
1148	size_t cbDel = pMutation->pMutationParent->cbInput - pMutation->cbInput;
1149
1150	/* Just move the residual data to the front. */
1151	memmove(pbBuf, pbBuf + cbDel, cbBuf - cbDel);
1152	return VINF_SUCCESS;
1153	}
1154
1155
1156	/**
1157	* Mutator callback - replaces a possible integer with something interesting.
1158	*/
1159	static DECLCALLBACK(int) rtFuzzCtxMutatorIntegerReplacePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
1160	PPRTFUZZMUTATION ppMutation)
1161	{
1162	int rc = VINF_SUCCESS;
1163	PRTFUZZMUTATORINTEGER pMutInt = NULL;
1164	PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, sizeof(pMutInt), (void *)&pMutInt);
1165	if (RT_LIKELY(pMutation))
1166	{
1167	size_t cbLeft = pMutationParent->cbInput - offStart;
1168	uint32_t uClassMax = 0;
1169
1170	switch (cbLeft)
1171	{
1172	case 1:
1173	uClassMax = 1;
1174	break;
1175	case 2:
1176	case 3:
1177	uClassMax = 3;
1178	break;
1179	case 4:
1180	case 5:
1181	case 6:
1182	case 7:
1183	uClassMax = 5;
1184	break;
1185	default:
1186	uClassMax = 7;
1187	break;
1188	}
1189
1190	pMutInt->uIntClass = (uint8_t)RTRandAdvU32Ex(pThis->hRand, 0, uClassMax);
1191	pMutInt->fByteSwap = RT_BOOL(RTRandAdvU32Ex(pThis->hRand, 0, 1));
1192
1193	switch (pMutInt->uIntClass)
1194	{
1195	case 0:
1196	pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_ai8Interesting) - 1);
1197	break;
1198	case 1:
1199	pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_au8Interesting) - 1);
1200	break;
1201	case 2:
1202	pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_ai16Interesting) - 1);
1203	break;
1204	case 3:
1205	pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_au16Interesting) - 1);
1206	break;
1207	case 4:
1208	pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_ai32Interesting) - 1);
1209	break;
1210	case 5:
1211	pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_au32Interesting) - 1);
1212	break;
1213	case 6:
1214	pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_ai64Interesting) - 1);
1215	break;
1216	case 7:
1217	pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_au64Interesting) - 1);
1218	break;
1219	default:
1220	AssertReleaseFailed();
1221	}
1222
1223	pMutation->cbInput = pMutationParent->cbInput;
1224	*ppMutation = pMutation;
1225	}
1226	else
1227	rc = VERR_NO_MEMORY;
1228
1229	return rc;
1230	}
1231
1232
1233	static DECLCALLBACK(int) rtFuzzCtxMutatorIntegerReplaceExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
1234	uint8_t *pbBuf, size_t cbBuf)
1235	{
1236	RT_NOREF(pThis, pMutation, cbBuf);
1237	union
1238	{
1239	int8_t i8;
1240	uint8_t u8;
1241	int16_t i16;
1242	uint16_t u16;
1243	int32_t i32;
1244	uint32_t u32;
1245	int64_t i64;
1246	uint64_t u64;
1247	} Int;
1248	PCRTFUZZMUTATORINTEGER pMutInt = (PCRTFUZZMUTATORINTEGER)pvMutation;
1249	size_t cb = 0;
1250
1251	switch (pMutInt->uIntClass)
1252	{
1253	case 0:
1254	Int.i8 = s_ai8Interesting[pMutInt->idxInt];
1255	cb = 1;
1256	break;
1257	case 1:
1258	Int.u8 = s_au8Interesting[pMutInt->idxInt];
1259	cb = 1;
1260	break;
1261	case 2:
1262	Int.i16 = s_ai16Interesting[pMutInt->idxInt];
1263	cb = 2;
1264	if (pMutInt->fByteSwap)
1265	Int.u16 = RT_BSWAP_U16(Int.u16);
1266	break;
1267	case 3:
1268	Int.u16 = s_au16Interesting[pMutInt->idxInt];
1269	cb = 2;
1270	if (pMutInt->fByteSwap)
1271	Int.u16 = RT_BSWAP_U16(Int.u16);
1272	break;
1273	case 4:
1274	Int.i32 = s_ai32Interesting[pMutInt->idxInt];
1275	cb = 4;
1276	if (pMutInt->fByteSwap)
1277	Int.u32 = RT_BSWAP_U32(Int.u32);
1278	break;
1279	case 5:
1280	Int.u32 = s_au32Interesting[pMutInt->idxInt];
1281	cb = 4;
1282	if (pMutInt->fByteSwap)
1283	Int.u32 = RT_BSWAP_U32(Int.u32);
1284	break;
1285	case 6:
1286	Int.i64 = s_ai64Interesting[pMutInt->idxInt];
1287	cb = 8;
1288	if (pMutInt->fByteSwap)
1289	Int.u64 = RT_BSWAP_U64(Int.u64);
1290	break;
1291	case 7:
1292	Int.u64 = s_au64Interesting[pMutInt->idxInt];
1293	cb = 8;
1294	if (pMutInt->fByteSwap)
1295	Int.u64 = RT_BSWAP_U64(Int.u64);
1296	break;
1297	default:
1298	AssertReleaseFailed();
1299	}
1300
1301	memcpy(pbBuf, &Int, cb);
1302	return VINF_SUCCESS;
1303	}
1304
1305
1306	/**
1307	* Mutator callback - crosses over two mutations at the given point.
1308	*/
1309	static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent,
1310	PPRTFUZZMUTATION ppMutation)
1311	{
1312	int rc = VINF_SUCCESS;
1313
1314	if (pThis->cMutations > 1)
1315	{
1316	uint64_t *pidxMutCrossover = NULL;
1317	PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, sizeof(pidxMutCrossover), (void *)&pidxMutCrossover);
1318	if (RT_LIKELY(pMutation))
1319	{
1320	uint32_t cTries = 10;
1321	PRTFUZZMUTATION pMutCrossover = NULL;
1322	/*
1323	* Pick a random mutation to crossover with (making sure it is not the current one
1324	* or the crossover point is beyond the end of input).
1325	*/
1326	do
1327	{
1328	if (pMutCrossover)
1329	rtFuzzMutationRelease(pMutCrossover);
1330	pMutCrossover = rtFuzzCtxMutationPickRnd(pThis);
1331	cTries--;
1332	} while ( ( pMutCrossover == pMutationParent
1333	\|\| offStart >= pMutCrossover->cbInput)
1334	&& cTries > 0);
1335
1336	if (cTries)
1337	{
1338	pMutation->cbInput = pMutCrossover->cbInput;
1339	*pidxMutCrossover = pMutCrossover->Core.Key;
1340	*ppMutation = pMutation;
1341	}
1342	else
1343	rtFuzzMutationDestroy(pMutation);
1344
1345	rtFuzzMutationRelease(pMutCrossover);
1346	}
1347	else
1348	rc = VERR_NO_MEMORY;
1349	}
1350
1351	return rc;
1352	}
1353
1354
1355	static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
1356	uint8_t *pbBuf, size_t cbBuf)
1357	{
1358	RT_NOREF(cbBuf);
1359	uint64_t idxMutCrossover = (uint64_t )pvMutation;
1360
1361	PRTFUZZMUTATION pMutCrossover = rtFuzzCtxMutationLocate(pThis, idxMutCrossover);
1362	int rc = rtFuzzMutationDataFinalize(pMutCrossover);
1363	if (RT_SUCCESS(rc))
1364	{
1365	memcpy(pbBuf, (uint8_t *)pMutCrossover->pvInput + pMutation->offMutation,
1366	pMutCrossover->cbInput - pMutation->offMutation);
1367	rtFuzzMutationRelease(pMutCrossover);
1368	}
1369
1370	return rc;
1371	}
1372
1373
1374	static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverExport(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation,
1375	PFNRTFUZZCTXEXPORT pfnExport, void *pvUser)
1376	{
1377	RT_NOREF(pMutation);
1378
1379	uint64_t idxMutCrossover = (uint64_t )pvMutation;
1380	idxMutCrossover = RT_H2LE_U64(idxMutCrossover);
1381	return pfnExport(pThis, &idxMutCrossover, sizeof(idxMutCrossover), pvUser);
1382	}
1383
1384
1385	static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverImport(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, void *pvMutation,
1386	PFNRTFUZZCTXIMPORT pfnImport, void *pvUser)
1387	{
1388	RT_NOREF(pMutation);
1389
1390	uint64_t uKey = 0;
1391	int rc = pfnImport(pThis, &uKey, sizeof(uKey), NULL, pvUser);
1392	if (RT_SUCCESS(rc))
1393	{
1394	uKey = RT_LE2H_U64(uKey);
1395	(uint64_t )pvMutation = uKey;
1396	}
1397
1398	return rc;
1399	}
1400
1401
1402	/**
1403	* Creates an empty fuzzing context.
1404	*
1405	* @returns IPRT status code.
1406	* @param ppThis Where to store the pointer to the internal fuzzing context instance on success.
1407	* @param enmType Fuzzing context type.
1408	*/
1409	static int rtFuzzCtxCreateEmpty(PRTFUZZCTXINT *ppThis, RTFUZZCTXTYPE enmType)
1410	{
1411	int rc;
1412	PRTFUZZCTXINT pThis = (PRTFUZZCTXINT)RTMemAllocZ(sizeof(*pThis));
1413	if (RT_LIKELY(pThis))
1414	{
1415	pThis->u32Magic = RTFUZZCTX_MAGIC;
1416	pThis->cRefs = 1;
1417	pThis->enmType = enmType;
1418	pThis->TreeMutations = NULL;
1419	pThis->cbInputMax = UINT32_MAX;
1420	pThis->cMutations = 0;
1421	pThis->fFlagsBehavioral = 0;
1422	pThis->cbMutationsAllocMax = _1G;
1423	pThis->cbMemTotal = 0;
1424	RTListInit(&pThis->LstMutationsAlloc);
1425
1426	/* Copy the default mutator descriptors over. */
1427	pThis->paMutators = (PRTFUZZMUTATOR)RTMemAllocZ(RT_ELEMENTS(g_aMutators) * sizeof(RTFUZZMUTATOR));
1428	if (RT_LIKELY(pThis->paMutators))
1429	{
1430	pThis->cMutators = RT_ELEMENTS(g_aMutators);
1431	memcpy(&pThis->paMutators[0], &g_aMutators[0], RT_ELEMENTS(g_aMutators) * sizeof(RTFUZZMUTATOR));
1432
1433	rc = RTSemRWCreate(&pThis->hSemRwMutations);
1434	if (RT_SUCCESS(rc))
1435	{
1436	rc = RTCritSectInit(&pThis->CritSectAlloc);
1437	if (RT_SUCCESS(rc))
1438	{
1439	rc = RTRandAdvCreateParkMiller(&pThis->hRand);
1440	if (RT_SUCCESS(rc))
1441	{
1442	RTRandAdvSeed(pThis->hRand, RTTimeSystemNanoTS());
1443	*ppThis = pThis;
1444	return VINF_SUCCESS;
1445	}
1446
1447	RTCritSectDelete(&pThis->CritSectAlloc);
1448	}
1449
1450	RTSemRWDestroy(pThis->hSemRwMutations);
1451	}
1452	}
1453	else
1454	rc = VERR_NO_MEMORY;
1455
1456	RTMemFree(pThis);
1457	}
1458	else
1459	rc = VERR_NO_MEMORY;
1460
1461	return rc;
1462	}
1463
1464
1465	/**
1466	* Destroys the given fuzzing input.
1467	*
1468	* @returns nothing.
1469	* @param pThis The fuzzing input to destroy.
1470	*/
1471	static void rtFuzzInputDestroy(PRTFUZZINPUTINT pThis)
1472	{
1473	PRTFUZZCTXINT pFuzzer = pThis->pFuzzer;
1474
1475	rtFuzzMutationRelease(pThis->pMutationTop);
1476	rtFuzzCtxMemoryFree(pFuzzer, pThis);
1477	RTFuzzCtxRelease(pFuzzer);
1478	}
1479
1480
1481	RTDECL(int) RTFuzzCtxCreate(PRTFUZZCTX phFuzzCtx, RTFUZZCTXTYPE enmType)
1482	{
1483	AssertPtrReturn(phFuzzCtx, VERR_INVALID_POINTER);
1484
1485	return rtFuzzCtxCreateEmpty(phFuzzCtx, enmType);
1486	}
1487
1488
1489	RTDECL(int) RTFuzzCtxCreateFromState(PRTFUZZCTX phFuzzCtx, PFNRTFUZZCTXIMPORT pfnImport, void *pvUser)
1490	{
1491	AssertPtrReturn(phFuzzCtx, VERR_INVALID_POINTER);
1492	AssertPtrReturn(pfnImport, VERR_INVALID_POINTER);
1493
1494	#if 0
1495	int rc = VINF_SUCCESS;
1496	if (cbState >= sizeof(RTFUZZCTXSTATE))
1497	{
1498	RTFUZZCTXSTATE StateImport;
1499
1500	memcpy(&StateImport, pvState, sizeof(RTFUZZCTXSTATE));
1501	if ( RT_LE2H_U32(StateImport.u32Magic) == RTFUZZCTX_MAGIC
1502	&& RT_LE2H_U32(StateImport.cbPrng) <= cbState - sizeof(RTFUZZCTXSTATE))
1503	{
1504	PRTFUZZCTXINT pThis = rtFuzzCtxCreateEmpty();
1505	if (RT_LIKELY(pThis))
1506	{
1507	pThis->cbInputMax = (size_t)RT_LE2H_U64(StateImport.cbInputMax);
1508	pThis->fFlagsBehavioral = RT_LE2H_U32(StateImport.fFlagsBehavioral);
1509
1510	uint8_t pbState = (uint8_t )pvState;
1511	uint32_t cInputs = RT_LE2H_U32(StateImport.cInputs);
1512	rc = RTRandAdvRestoreState(pThis->hRand, (const char *)&pbState[sizeof(RTFUZZCTXSTATE)]);
1513	if (RT_SUCCESS(rc))
1514	{
1515	/* Go through the inputs and add them. */
1516	pbState += sizeof(RTFUZZCTXSTATE) + RT_LE2H_U32(StateImport.cbPrng);
1517	cbState -= sizeof(RTFUZZCTXSTATE) + RT_LE2H_U32(StateImport.cbPrng);
1518
1519	uint32_t idx = 0;
1520	while ( idx < cInputs
1521	&& RT_SUCCESS(rc))
1522	{
1523	size_t cbInput = 0;
1524	if (cbState >= sizeof(uint32_t))
1525	{
1526	memcpy(&cbInput, pbState, sizeof(uint32_t));
1527	cbInput = RT_LE2H_U32(cbInput);
1528	pbState += sizeof(uint32_t);
1529	}
1530
1531	if ( cbInput
1532	&& cbInput <= cbState)
1533	{
1534	PRTFUZZINPUTINT pInput = rtFuzzCtxInputCreate(pThis, cbInput);
1535	if (RT_LIKELY(pInput))
1536	{
1537	memcpy(&pInput->abInput[0], pbState, cbInput);
1538	RTMd5(&pInput->abInput[0], pInput->cbInput, &pInput->abMd5Hash[0]);
1539	rc = rtFuzzCtxInputAdd(pThis, pInput);
1540	if (RT_FAILURE(rc))
1541	RTMemFree(pInput);
1542	pbState += cbInput;
1543	}
1544	}
1545	else
1546	rc = VERR_INVALID_STATE;
1547
1548	idx++;
1549	}
1550
1551	if (RT_SUCCESS(rc))
1552	{
1553	*phFuzzCtx = pThis;
1554	return VINF_SUCCESS;
1555	}
1556	}
1557
1558	rtFuzzCtxDestroy(pThis);
1559	}
1560	else
1561	rc = VERR_NO_MEMORY;
1562	}
1563	else
1564	rc = VERR_INVALID_MAGIC;
1565	}
1566	else
1567	rc = VERR_INVALID_MAGIC;
1568
1569	return rc;
1570	#else
1571	RT_NOREF(pvUser);
1572	return VERR_NOT_IMPLEMENTED;
1573	#endif
1574	}
1575
1576
1577	RTDECL(int) RTFuzzCtxCreateFromStateMem(PRTFUZZCTX phFuzzCtx, const void *pvState, size_t cbState)
1578	{
1579	AssertPtrReturn(phFuzzCtx, VERR_INVALID_POINTER);
1580	AssertPtrReturn(pvState, VERR_INVALID_POINTER);
1581	AssertPtrReturn(cbState, VERR_INVALID_POINTER);
1582
1583	return VERR_NOT_IMPLEMENTED;
1584	}
1585
1586
1587	RTDECL(int) RTFuzzCtxCreateFromStateFile(PRTFUZZCTX phFuzzCtx, const char *pszFilename)
1588	{
1589	AssertPtrReturn(phFuzzCtx, VERR_INVALID_POINTER);
1590	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
1591
1592	void *pv = NULL;
1593	size_t cb = 0;
1594	int rc = RTFileReadAll(pszFilename, &pv, &cb);
1595	if (RT_SUCCESS(rc))
1596	{
1597	rc = RTFuzzCtxCreateFromStateMem(phFuzzCtx, pv, cb);
1598	RTFileReadAllFree(pv, cb);
1599	}
1600
1601	return rc;
1602	}
1603
1604
1605	RTDECL(uint32_t) RTFuzzCtxRetain(RTFUZZCTX hFuzzCtx)
1606	{
1607	PRTFUZZCTXINT pThis = hFuzzCtx;
1608
1609	AssertPtrReturn(pThis, UINT32_MAX);
1610
1611	uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
1612	AssertMsg(cRefs > 1 && cRefs < _1M, ("%#x %p\n", cRefs, pThis));
1613	return cRefs;
1614	}
1615
1616
1617	RTDECL(uint32_t) RTFuzzCtxRelease(RTFUZZCTX hFuzzCtx)
1618	{
1619	PRTFUZZCTXINT pThis = hFuzzCtx;
1620	if (pThis == NIL_RTFUZZCTX)
1621	return 0;
1622	AssertPtrReturn(pThis, UINT32_MAX);
1623
1624	uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
1625	AssertMsg(cRefs < _1M, ("%#x %p\n", cRefs, pThis));
1626	if (cRefs == 0)
1627	rtFuzzCtxDestroy(pThis);
1628	return cRefs;
1629	}
1630
1631
1632	RTDECL(int) RTFuzzCtxQueryStats(RTFUZZCTX hFuzzCtx, PRTFUZZCTXSTATS pStats)
1633	{
1634	PRTFUZZCTXINT pThis = hFuzzCtx;
1635	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1636	AssertPtrReturn(pStats, VERR_INVALID_POINTER);
1637
1638	pStats->cbMemory = ASMAtomicReadZ(&pThis->cbMemTotal);
1639	pStats->cMutations = ASMAtomicReadU64(&pThis->cMutations);
1640	return VINF_SUCCESS;
1641	}
1642
1643
1644	/**
1645	* Fuzzing context export callback for a single mutation.
1646	*/
1647	static DECLCALLBACK(int) rtFuzzCtxStateExportMutations(PAVLU64NODECORE pCore, void *pvParam)
1648	{
1649	PRTFUZZMUTATION pMutation = (PRTFUZZMUTATION)pCore;
1650	PCRTFUZZMUTATOR pMutator = pMutation->pMutator;
1651	PCRTFUZZEXPORTARGS pArgs = (PCRTFUZZEXPORTARGS)pvParam;
1652	RTFUZZMUTATIONSTATE MutationState;
1653
1654	MutationState.u64Id = RT_H2LE_U64(pMutation->Core.Key);
1655	if (pMutation->pMutationParent)
1656	MutationState.u64IdParent = RT_H2LE_U64(pMutation->pMutationParent->Core.Key);
1657	else
1658	MutationState.u64IdParent = RT_H2LE_U64(0);
1659	MutationState.u64OffMutation = RT_H2LE_U64(pMutation->offMutation);
1660	MutationState.cbInput = RT_H2LE_U64((uint64_t)pMutation->cbInput);
1661	MutationState.cbMutation = RT_H2LE_U64((uint64_t)pMutation->cbMutation);
1662	MutationState.u32IdMutator = RT_H2LE_U32(pMutator->uMutator);
1663	MutationState.iLvl = RT_H2LE_U32(pMutation->iLvl);
1664	MutationState.u32Magic = RT_H2LE_U32(pMutation->u32Magic);
1665
1666	int rc = pArgs->pfnExport(pMutation->pFuzzer, &MutationState, sizeof(MutationState), pArgs->pvUser);
1667	if ( RT_SUCCESS(rc)
1668	&& pMutator->pfnExport)
1669	rc = pMutator->pfnExport(pMutation->pFuzzer, pMutation, &pMutation->abMutation[0], pArgs->pfnExport, pArgs->pvUser);
1670	return rc;
1671	}
1672
1673
1674	RTDECL(int) RTFuzzCtxStateExport(RTFUZZCTX hFuzzCtx, PFNRTFUZZCTXEXPORT pfnExport, void *pvUser)
1675	{
1676	PRTFUZZCTXINT pThis = hFuzzCtx;
1677	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1678	AssertPtrReturn(pfnExport, VERR_INVALID_POINTER);
1679
1680	char aszPrngExport[_4K]; /* Should be plenty of room here. */
1681	size_t cbPrng = sizeof(aszPrngExport);
1682	int rc = RTRandAdvSaveState(pThis->hRand, &aszPrngExport[0], &cbPrng);
1683	if (RT_SUCCESS(rc))
1684	{
1685	RTFUZZCTXSTATE StateExport;
1686
1687	StateExport.u32Magic = RT_H2LE_U32(RTFUZZCTX_MAGIC);
1688	switch (pThis->enmType)
1689	{
1690	case RTFUZZCTXTYPE_BLOB:
1691	StateExport.uCtxType = RT_H2LE_U32(RTFUZZCTX_STATE_TYPE_BLOB);
1692	break;
1693	case RTFUZZCTXTYPE_STREAM:
1694	StateExport.uCtxType = RT_H2LE_U32(RTFUZZCTX_STATE_TYPE_STREAM);
1695	break;
1696	default:
1697	AssertFailed();
1698	break;
1699	}
1700	StateExport.cbPrng = RT_H2LE_U32((uint32_t)cbPrng);
1701	StateExport.cMutations = RT_H2LE_U32(pThis->cMutations);
1702	StateExport.cMutators = RT_H2LE_U32(pThis->cMutators);
1703	StateExport.fFlagsBehavioral = RT_H2LE_U32(pThis->fFlagsBehavioral);
1704	StateExport.cbInputMax = RT_H2LE_U64(pThis->cbInputMax);
1705
1706	/* Write the context state and PRNG state first. */
1707	rc = pfnExport(pThis, &StateExport, sizeof(StateExport), pvUser);
1708	if (RT_SUCCESS(rc))
1709	rc = pfnExport(pThis, &aszPrngExport[0], cbPrng, pvUser);
1710	if (RT_SUCCESS(rc))
1711	{
1712	/* Write the mutator descriptors next. */
1713	for (uint32_t i = 0; i < pThis->cMutators && RT_SUCCESS(rc); i++)
1714	{
1715	PRTFUZZMUTATOR pMutator = &pThis->paMutators[i];
1716	uint32_t cchId = (uint32_t)strlen(pMutator->pszId) + 1;
1717	uint32_t cchIdW = RT_H2LE_U32(cchId);
1718
1719	rc = pfnExport(pThis, &cchIdW, sizeof(cchIdW), pvUser);
1720	if (RT_SUCCESS(rc))
1721	rc = pfnExport(pThis, &pMutator->pszId[0], cchId, pvUser);
1722	}
1723	}
1724
1725	/* Write the mutations last. */
1726	if (RT_SUCCESS(rc))
1727	{
1728	RTFUZZEXPORTARGS Args;
1729
1730	Args.pfnExport = pfnExport;
1731	Args.pvUser = pvUser;
1732	rc = RTAvlU64DoWithAll(&pThis->TreeMutations, true /fFromLeft/, rtFuzzCtxStateExportMutations, &Args);
1733	}
1734	}
1735
1736	return rc;
1737	}
1738
1739
1740	RTDECL(int) RTFuzzCtxStateExportToMem(RTFUZZCTX hFuzzCtx, void *ppvState, size_t pcbState)
1741	{
1742	PRTFUZZCTXINT pThis = hFuzzCtx;
1743	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1744	AssertPtrReturn(ppvState, VERR_INVALID_POINTER);
1745	AssertPtrReturn(pcbState, VERR_INVALID_POINTER);
1746
1747	return VERR_NOT_IMPLEMENTED;
1748	}
1749
1750
1751	/**
1752	* Export to file callback.
1753	*/
1754	static DECLCALLBACK(int) rtFuzzCtxStateExportFile(RTFUZZCTX hFuzzCtx, const void pvBuf, size_t cbWrite, void pvUser)
1755	{
1756	RT_NOREF(hFuzzCtx);
1757
1758	RTFILE hFile = (RTFILE)pvUser;
1759	return RTFileWrite(hFile, pvBuf, cbWrite, NULL);
1760	}
1761
1762
1763	RTDECL(int) RTFuzzCtxStateExportToFile(RTFUZZCTX hFuzzCtx, const char *pszFilename)
1764	{
1765	PRTFUZZCTXINT pThis = hFuzzCtx;
1766	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1767	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
1768
1769	RTFILE hFile;
1770	int rc = RTFileOpen(&hFile, pszFilename, RTFILE_O_CREATE \| RTFILE_O_WRITE \| RTFILE_O_DENY_NONE);
1771	if (RT_SUCCESS(rc))
1772	{
1773	rc = RTFuzzCtxStateExport(hFuzzCtx, rtFuzzCtxStateExportFile, hFile);
1774	RTFileClose(hFile);
1775	if (RT_FAILURE(rc))
1776	RTFileDelete(pszFilename);
1777	}
1778
1779	return rc;
1780	}
1781
1782
1783	RTDECL(int) RTFuzzCtxCorpusInputAdd(RTFUZZCTX hFuzzCtx, const void *pvInput, size_t cbInput)
1784	{
1785	PRTFUZZCTXINT pThis = hFuzzCtx;
1786	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1787	AssertPtrReturn(pvInput, VERR_INVALID_POINTER);
1788	AssertReturn(cbInput, VERR_INVALID_POINTER);
1789
1790	int rc = VINF_SUCCESS;
1791	void *pvCorpus = NULL;
1792	PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, 0, NULL, cbInput, &pvCorpus);
1793	if (RT_LIKELY(pMutation))
1794	{
1795	pMutation->pMutator = &g_MutatorCorpus;
1796	pMutation->cbInput = cbInput;
1797	pMutation->pvInput = pvCorpus;
1798	memcpy(pvCorpus, pvInput, cbInput);
1799	rc = rtFuzzCtxMutationAdd(pThis, pMutation);
1800	if (RT_FAILURE(rc))
1801	rtFuzzMutationDestroy(pMutation);
1802	}
1803	else
1804	rc = VERR_NO_MEMORY;
1805
1806	return rc;
1807	}
1808
1809
1810	RTDECL(int) RTFuzzCtxCorpusInputAddFromFile(RTFUZZCTX hFuzzCtx, const char *pszFilename)
1811	{
1812	PRTFUZZCTXINT pThis = hFuzzCtx;
1813	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1814	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
1815
1816	void *pv = NULL;
1817	size_t cb = 0;
1818	int rc = RTFileReadAll(pszFilename, &pv, &cb);
1819	if (RT_SUCCESS(rc))
1820	{
1821	rc = RTFuzzCtxCorpusInputAdd(hFuzzCtx, pv, cb);
1822	RTFileReadAllFree(pv, cb);
1823	}
1824
1825	return rc;
1826	}
1827
1828
1829	RTDECL(int) RTFuzzCtxCorpusInputAddFromVfsFile(RTFUZZCTX hFuzzCtx, RTVFSFILE hVfsFile)
1830	{
1831	PRTFUZZCTXINT pThis = hFuzzCtx;
1832	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1833	AssertReturn(hVfsFile != NIL_RTVFSFILE, VERR_INVALID_HANDLE);
1834
1835	uint64_t cbFile = 0;
1836	void *pvCorpus = NULL;
1837	int rc = RTVfsFileGetSize(hVfsFile, &cbFile);
1838	if (RT_SUCCESS(rc))
1839	{
1840	PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, 0, NULL, cbFile, &pvCorpus);
1841	if (RT_LIKELY(pMutation))
1842	{
1843	pMutation->pMutator = &g_MutatorCorpus;
1844	pMutation->cbInput = cbFile;
1845	pMutation->pvInput = pvCorpus;
1846	rc = RTVfsFileRead(hVfsFile, pvCorpus, cbFile, NULL);
1847	if (RT_SUCCESS(rc))
1848	rc = rtFuzzCtxMutationAdd(pThis, pMutation);
1849
1850	if (RT_FAILURE(rc))
1851	rtFuzzMutationDestroy(pMutation);
1852	}
1853	}
1854
1855	return rc;
1856	}
1857
1858
1859	RTDECL(int) RTFuzzCtxCorpusInputAddFromDirPath(RTFUZZCTX hFuzzCtx, const char *pszDirPath)
1860	{
1861	PRTFUZZCTXINT pThis = hFuzzCtx;
1862	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1863	AssertPtrReturn(pszDirPath, VERR_INVALID_POINTER);
1864
1865	RTDIR hDir;
1866	int rc = RTDirOpen(&hDir, pszDirPath);
1867	if (RT_SUCCESS(rc))
1868	{
1869	for (;;)
1870	{
1871	RTDIRENTRY DirEntry;
1872	rc = RTDirRead(hDir, &DirEntry, NULL);
1873	if (RT_FAILURE(rc))
1874	break;
1875
1876	/* Skip '.', '..' and other non-files. */
1877	if ( DirEntry.enmType != RTDIRENTRYTYPE_UNKNOWN
1878	&& DirEntry.enmType != RTDIRENTRYTYPE_FILE)
1879	continue;
1880	if (RTDirEntryIsStdDotLink(&DirEntry))
1881	continue;
1882
1883	/* Compose the full path, result 'unknown' entries and skip non-files. */
1884	char szFile[RTPATH_MAX];
1885	RT_ZERO(szFile);
1886	rc = RTPathJoin(szFile, sizeof(szFile), pszDirPath, DirEntry.szName);
1887	if (RT_FAILURE(rc))
1888	break;
1889
1890	if (DirEntry.enmType == RTDIRENTRYTYPE_UNKNOWN)
1891	{
1892	RTDirQueryUnknownType(szFile, false, &DirEntry.enmType);
1893	if (DirEntry.enmType != RTDIRENTRYTYPE_FILE)
1894	continue;
1895	}
1896
1897	/* Okay, it's a file we can add. */
1898	rc = RTFuzzCtxCorpusInputAddFromFile(hFuzzCtx, szFile);
1899	if (RT_FAILURE(rc))
1900	break;
1901	}
1902	if (rc == VERR_NO_MORE_FILES)
1903	rc = VINF_SUCCESS;
1904	RTDirClose(hDir);
1905	}
1906
1907	return rc;
1908	}
1909
1910
1911	RTDECL(int) RTFuzzCtxCfgSetInputSeedMaximum(RTFUZZCTX hFuzzCtx, size_t cbMax)
1912	{
1913	PRTFUZZCTXINT pThis = hFuzzCtx;
1914	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1915
1916	pThis->cbInputMax = cbMax;
1917	return VINF_SUCCESS;
1918	}
1919
1920
1921	RTDECL(size_t) RTFuzzCtxCfgGetInputSeedMaximum(RTFUZZCTX hFuzzCtx)
1922	{
1923	PRTFUZZCTXINT pThis = hFuzzCtx;
1924	AssertPtrReturn(pThis, 0);
1925
1926	return pThis->cbInputMax;
1927	}
1928
1929
1930	RTDECL(int) RTFuzzCtxCfgSetBehavioralFlags(RTFUZZCTX hFuzzCtx, uint32_t fFlags)
1931	{
1932	PRTFUZZCTXINT pThis = hFuzzCtx;
1933	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1934	AssertReturn(!(fFlags & ~RTFUZZCTX_F_BEHAVIORAL_VALID), VERR_INVALID_PARAMETER);
1935
1936	pThis->fFlagsBehavioral = fFlags;
1937	return VINF_SUCCESS;
1938	}
1939
1940
1941	RTDECL(uint32_t) RTFuzzCfgGetBehavioralFlags(RTFUZZCTX hFuzzCtx)
1942	{
1943	PRTFUZZCTXINT pThis = hFuzzCtx;
1944	AssertPtrReturn(pThis, 0);
1945
1946	return pThis->fFlagsBehavioral;
1947	}
1948
1949
1950	RTDECL(int) RTFuzzCtxCfgSetTmpDirectory(RTFUZZCTX hFuzzCtx, const char *pszPathTmp)
1951	{
1952	PRTFUZZCTXINT pThis = hFuzzCtx;
1953	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1954	AssertPtrReturn(pszPathTmp, VERR_INVALID_POINTER);
1955
1956	return VERR_NOT_IMPLEMENTED;
1957	}
1958
1959
1960	RTDECL(const char *) RTFuzzCtxCfgGetTmpDirectory(RTFUZZCTX hFuzzCtx)
1961	{
1962	PRTFUZZCTXINT pThis = hFuzzCtx;
1963	AssertPtrReturn(pThis, NULL);
1964
1965	return NULL;
1966	}
1967
1968
1969	RTDECL(int) RTFuzzCtxReseed(RTFUZZCTX hFuzzCtx, uint64_t uSeed)
1970	{
1971	PRTFUZZCTXINT pThis = hFuzzCtx;
1972	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1973
1974	RTRandAdvSeed(pThis->hRand, uSeed);
1975	return VINF_SUCCESS;
1976	}
1977
1978
1979	RTDECL(int) RTFuzzCtxInputGenerate(RTFUZZCTX hFuzzCtx, PRTFUZZINPUT phFuzzInput)
1980	{
1981	int rc = VINF_SUCCESS;
1982	PRTFUZZCTXINT pThis = hFuzzCtx;
1983	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1984	AssertPtrReturn(phFuzzInput, VERR_INVALID_POINTER);
1985
1986	uint32_t cTries = 0;
1987	PRTFUZZMUTATION pMutationParent = rtFuzzCtxMutationPickRnd(pThis);
1988	do
1989	{
1990	uint32_t idxMutator = RTRandAdvU32Ex(pThis->hRand, 0, pThis->cMutators - 1);
1991	PCRTFUZZMUTATOR pMutator = &pThis->paMutators[idxMutator];
1992	PRTFUZZMUTATION pMutation = NULL;
1993
1994	uint64_t offStart = 0;
1995	if (!(pMutator->fFlags & RTFUZZMUTATOR_F_END_OF_BUF))
1996	offStart = RTRandAdvU64Ex(pThis->hRand, 0, pMutationParent->cbInput - 1);
1997	else
1998	offStart = pMutationParent->cbInput;
1999
2000	rc = pMutator->pfnPrep(pThis, offStart, pMutationParent, &pMutation);
2001	if ( RT_SUCCESS(rc)
2002	&& VALID_PTR(pMutation))
2003	{
2004	pMutation->pMutator = pMutator;
2005
2006	if (pThis->fFlagsBehavioral & RTFUZZCTX_F_BEHAVIORAL_ADD_INPUT_AUTOMATICALLY_TO_CORPUS)
2007	rtFuzzCtxMutationAdd(pThis, pMutation);
2008
2009	/* Create a new input. */
2010	PRTFUZZINPUTINT pInput = (PRTFUZZINPUTINT)rtFuzzCtxMemoryAlloc(pThis, sizeof(RTFUZZINPUTINT));
2011	if (RT_LIKELY(pInput))
2012	{
2013	pInput->u32Magic = 0; /** @todo */
2014	pInput->cRefs = 1;
2015	pInput->pFuzzer = pThis;
2016	pInput->pMutationTop = pMutation;
2017	RTFuzzCtxRetain(pThis);
2018
2019	rtFuzzMutationRelease(pMutationParent);
2020	*phFuzzInput = pInput;
2021	return rc;
2022	}
2023	else
2024	rc = VERR_NO_MEMORY;
2025	}
2026	} while (++cTries <= 50);
2027
2028	rtFuzzMutationRelease(pMutationParent);
2029	if (RT_SUCCESS(rc))
2030	rc = VERR_INVALID_STATE;
2031
2032	return rc;
2033	}
2034
2035
2036	RTDECL(int) RTFuzzInputQueryBlobData(RTFUZZINPUT hFuzzInput, void *ppv, size_t pcb)
2037	{
2038	PRTFUZZINPUTINT pThis = hFuzzInput;
2039	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
2040	AssertReturn(pThis->pFuzzer->enmType == RTFUZZCTXTYPE_BLOB, VERR_INVALID_STATE);
2041
2042	int rc = VINF_SUCCESS;
2043	if (!pThis->pMutationTop->pvInput)
2044	rc = rtFuzzMutationDataFinalize(pThis->pMutationTop);
2045
2046	if (RT_SUCCESS(rc))
2047	{
2048	*ppv = pThis->pMutationTop->pvInput;
2049	*pcb = pThis->pMutationTop->cbInput;
2050	}
2051
2052	return rc;
2053	}
2054
2055
2056	RTDECL(int) RTFuzzInputMutateStreamData(RTFUZZINPUT hFuzzInput, void *pvBuf, size_t cbBuf)
2057	{
2058	PRTFUZZINPUTINT pThis = hFuzzInput;
2059	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
2060	AssertReturn(pThis->pFuzzer->enmType == RTFUZZCTXTYPE_STREAM, VERR_INVALID_STATE);
2061
2062	RT_NOREF(pvBuf, cbBuf);
2063	return VERR_NOT_IMPLEMENTED;
2064	}
2065
2066
2067	RTDECL(uint32_t) RTFuzzInputRetain(RTFUZZINPUT hFuzzInput)
2068	{
2069	PRTFUZZINPUTINT pThis = hFuzzInput;
2070
2071	AssertPtrReturn(pThis, UINT32_MAX);
2072
2073	uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
2074	AssertMsg(cRefs > 1 && cRefs < _1M, ("%#x %p\n", cRefs, pThis));
2075	return cRefs;
2076	}
2077
2078
2079	RTDECL(uint32_t) RTFuzzInputRelease(RTFUZZINPUT hFuzzInput)
2080	{
2081	PRTFUZZINPUTINT pThis = hFuzzInput;
2082	if (pThis == NIL_RTFUZZINPUT)
2083	return 0;
2084	AssertPtrReturn(pThis, UINT32_MAX);
2085
2086	uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
2087	AssertMsg(cRefs < _1M, ("%#x %p\n", cRefs, pThis));
2088	if (cRefs == 0)
2089	rtFuzzInputDestroy(pThis);
2090	return cRefs;
2091	}
2092
2093
2094	RTDECL(int) RTFuzzInputQueryDigestString(RTFUZZINPUT hFuzzInput, char *pszDigest, size_t cchDigest)
2095	{
2096	PRTFUZZINPUTINT pThis = hFuzzInput;
2097	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
2098	AssertReturn(pThis->pFuzzer->enmType == RTFUZZCTXTYPE_BLOB, VERR_INVALID_STATE);
2099	AssertPtrReturn(pszDigest, VERR_INVALID_POINTER);
2100	AssertReturn(cchDigest >= RTMD5_STRING_LEN + 1, VERR_INVALID_PARAMETER);
2101
2102	int rc = VINF_SUCCESS;
2103	if (!pThis->pMutationTop->pvInput)
2104	rc = rtFuzzMutationDataFinalize(pThis->pMutationTop);
2105
2106	if (RT_SUCCESS(rc))
2107	{
2108	uint8_t abHash[RTMD5_HASH_SIZE];
2109	RTMd5(pThis->pMutationTop->pvInput, pThis->pMutationTop->cbInput, &abHash[0]);
2110	rc = RTMd5ToString(&abHash[0], pszDigest, cchDigest);
2111	}
2112
2113	return rc;
2114	}
2115
2116
2117	RTDECL(int) RTFuzzInputWriteToFile(RTFUZZINPUT hFuzzInput, const char *pszFilename)
2118	{
2119	PRTFUZZINPUTINT pThis = hFuzzInput;
2120	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
2121	AssertReturn(pThis->pFuzzer->enmType == RTFUZZCTXTYPE_BLOB, VERR_INVALID_STATE);
2122	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
2123
2124	int rc = VINF_SUCCESS;
2125	if (!pThis->pMutationTop->pvInput)
2126	rc = rtFuzzMutationDataFinalize(pThis->pMutationTop);
2127
2128	if (RT_SUCCESS(rc))
2129	{
2130	RTFILE hFile;
2131	rc = RTFileOpen(&hFile, pszFilename, RTFILE_O_CREATE \| RTFILE_O_WRITE \| RTFILE_O_DENY_NONE);
2132	if (RT_SUCCESS(rc))
2133	{
2134	rc = RTFileWrite(hFile, pThis->pMutationTop->pvInput, pThis->pMutationTop->cbInput, NULL);
2135	AssertRC(rc);
2136	RTFileClose(hFile);
2137
2138	if (RT_FAILURE(rc))
2139	RTFileDelete(pszFilename);
2140	}
2141	}
2142
2143	return rc;
2144	}
2145
2146
2147	RTDECL(int) RTFuzzInputAddToCtxCorpus(RTFUZZINPUT hFuzzInput)
2148	{
2149	PRTFUZZINPUTINT pThis = hFuzzInput;
2150	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
2151
2152	return rtFuzzCtxMutationAdd(pThis->pFuzzer, pThis->pMutationTop);
2153	}
2154
2155
2156	RTDECL(int) RTFuzzInputRemoveFromCtxCorpus(RTFUZZINPUT hFuzzInput)
2157	{
2158	PRTFUZZINPUTINT pThis = hFuzzInput;
2159	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
2160
2161	#if 0
2162	int rc = VINF_SUCCESS;
2163	PRTFUZZINTERMEDIATE pIntermediate = NULL;
2164	PRTFUZZINPUTINT pInputLoc = rtFuzzCtxInputLocate(pThis->pFuzzer, &pThis->abMd5Hash[0], true /fExact/,
2165	&pIntermediate);
2166	if (pInputLoc)
2167	{
2168	AssertPtr(pIntermediate);
2169	Assert(pInputLoc == pThis);
2170
2171	uint64_t u64Md5Low = (uint64_t )&pThis->abMd5Hash[0];
2172	RTAvlU64Remove(&pIntermediate->TreeSeedsLow, u64Md5Low);
2173	RTFuzzInputRelease(hFuzzInput);
2174	}
2175	else
2176	rc = VERR_NOT_FOUND;
2177	#endif
2178
2179	return VERR_NOT_IMPLEMENTED;
2180	}
2181

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source: vbox/trunk/src/VBox/Runtime/common/fuzz/fuzz.cpp@ 79570

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