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Diffstat (limited to 'src/VBox/Runtime/common/fuzz/fuzz.cpp')
| -rw-r--r-- | src/VBox/Runtime/common/fuzz/fuzz.cpp | 2181 |
1 files changed, 2181 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/fuzz/fuzz.cpp b/src/VBox/Runtime/common/fuzz/fuzz.cpp new file mode 100644 index 00000000..579b792d --- /dev/null +++ b/src/VBox/Runtime/common/fuzz/fuzz.cpp @@ -0,0 +1,2181 @@ +/* $Id: fuzz.cpp $ */ +/** @file + * IPRT - Fuzzing framework API, core. + */ + +/* + * Copyright (C) 2018-2020 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <iprt/fuzz.h> +#include "internal/iprt.h" + +#include <iprt/asm.h> +#include <iprt/assert.h> +#include <iprt/avl.h> +#include <iprt/critsect.h> +#include <iprt/ctype.h> +#include <iprt/dir.h> +#include <iprt/err.h> +#include <iprt/file.h> +#include <iprt/list.h> +#include <iprt/md5.h> +#include <iprt/mem.h> +#include <iprt/path.h> +#include <iprt/rand.h> +#include <iprt/semaphore.h> +#include <iprt/string.h> +#include <iprt/time.h> +#include <iprt/vfs.h> + + +#define RTFUZZCTX_MAGIC UINT32_C(0xdeadc0de) /** @todo */ + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +/** Pointer to the internal fuzzer state. */ +typedef struct RTFUZZCTXINT *PRTFUZZCTXINT; +/** Pointer to a fuzzed mutation. */ +typedef struct RTFUZZMUTATION *PRTFUZZMUTATION; +/** Pointer to a fuzzed mutation pointer. */ +typedef PRTFUZZMUTATION *PPRTFUZZMUTATION; +/** Pointer to a const mutation. */ +typedef const struct RTFUZZMUTATION *PCRTFUZZMUTATION; + + +/** + * Mutator class. + */ +typedef enum RTFUZZMUTATORCLASS +{ + /** Invalid class, do not use. */ + RTFUZZMUTATORCLASS_INVALID = 0, + /** Mutator operates on single bits. */ + RTFUZZMUTATORCLASS_BITS, + /** Mutator operates on bytes (single or multiple). */ + RTFUZZMUTATORCLASS_BYTES, + /** Mutator interpretes data as integers and operates on them. */ + RTFUZZMUTATORCLASS_INTEGERS, + /** Mutator uses multiple mutations to create new mutations. */ + RTFUZZMUTATORCLASS_MUTATORS, + /** 32bit hack. */ + RTFUZZMUTATORCLASS_32BIT_HACK = 0x7fffffff +} RTFUZZMUTATORCLASS; + + +/** + * Mutator preparation callback. + * + * @returns IPRT status code. + * @param pThis The fuzzer context instance. + * @param offStart Where the mutation should start. + * @param pMutationParent The parent mutation to start working from. + * @param ppMutation Where to store the created mutation on success. + */ +typedef DECLCALLBACK(int) FNRTFUZZCTXMUTATORPREP(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation); +/** Pointer to a mutator preparation callback. */ +typedef FNRTFUZZCTXMUTATORPREP *PFNRTFUZZCTXMUTATORPREP; + + +/** + * Mutator execution callback. + * + * @returns IPRT status code. + * @param pThis The fuzzer context instance. + * @param pMutation The mutation to work on. + * @param pvMutation Mutation dependent data. + * @param pbBuf The buffer to work on. + * @param cbBuf Size of the remaining buffer. + */ +typedef DECLCALLBACK(int) FNRTFUZZCTXMUTATOREXEC(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf); +/** Pointer to a mutator execution callback. */ +typedef FNRTFUZZCTXMUTATOREXEC *PFNRTFUZZCTXMUTATOREXEC; + + +/** + * Mutator export callback. + * + * @returns IPRT status code. + * @param pThis The fuzzer context instance. + * @param pMutation The mutation to work on. + * @param pvMutation Mutation dependent data. + * @param pfnExport The export callback. + * @param pvUser Opaque user data to pass to the export callback. + */ +typedef DECLCALLBACK(int) FNRTFUZZCTXMUTATOREXPORT(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + PFNRTFUZZCTXEXPORT pfnExport, void *pvUser); +/** Pointer to a mutator export callback. */ +typedef FNRTFUZZCTXMUTATOREXPORT *PFNRTFUZZCTXMUTATOREXPORT; + + +/** + * Mutator import callback. + * + * @returns IPRT status code. + * @param pThis The fuzzer context instance. + * @param pMutation The mutation to work on. + * @param pvMutation Mutation dependent data. + * @param pfnExport The import callback. + * @param pvUser Opaque user data to pass to the import callback. + */ +typedef DECLCALLBACK(int) FNRTFUZZCTXMUTATORIMPORT(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, void *pvMutation, + PFNRTFUZZCTXIMPORT pfnImport, void *pvUser); +/** Pointer to a mutator import callback. */ +typedef FNRTFUZZCTXMUTATORIMPORT *PFNRTFUZZCTXMUTATORIMPORT; + + +/** + * A fuzzing mutator descriptor. + */ +typedef struct RTFUZZMUTATOR +{ + /** Id of the mutator. */ + const char *pszId; + /** Mutator description. */ + const char *pszDesc; + /** Mutator index. */ + uint32_t uMutator; + /** Mutator class. */ + RTFUZZMUTATORCLASS enmClass; + /** Additional flags for the mutator, controlling the behavior. */ + uint64_t fFlags; + /** The preparation callback. */ + PFNRTFUZZCTXMUTATORPREP pfnPrep; + /** The execution callback. */ + PFNRTFUZZCTXMUTATOREXEC pfnExec; + /** The export callback. */ + PFNRTFUZZCTXMUTATOREXPORT pfnExport; + /** The import callback. */ + PFNRTFUZZCTXMUTATORIMPORT pfnImport; +} RTFUZZMUTATOR; +/** Pointer to a fuzzing mutator descriptor. */ +typedef RTFUZZMUTATOR *PRTFUZZMUTATOR; +/** Pointer to a const fuzzing mutator descriptor. */ +typedef const RTFUZZMUTATOR *PCRTFUZZMUTATOR; + +/** The special corpus mutator. */ +#define RTFUZZMUTATOR_ID_CORPUS UINT32_C(0xffffffff) + +/** Mutator always works from the end of the buffer (no starting offset generation). */ +#define RTFUZZMUTATOR_F_END_OF_BUF RT_BIT_64(0) +/** Default flags. */ +#define RTFUZZMUTATOR_F_DEFAULT (0) + + +/** + * A fuzzed mutation. + */ +typedef struct RTFUZZMUTATION +{ + /** The AVL tree core. */ + AVLU64NODECORE Core; + /** The list node if the mutation has the mutated + * data allocated. */ + RTLISTNODE NdAlloc; + /** Magic identifying this structure. */ + uint32_t u32Magic; + /** Reference counter. */ + volatile uint32_t cRefs; + /** The fuzzer this mutation belongs to. */ + PRTFUZZCTXINT pFuzzer; + /** Parent mutation (no reference is held), NULL means root or original data. */ + PRTFUZZMUTATION pMutationParent; + /** Mutation level. */ + uint32_t iLvl; + /** The mutator causing this mutation, NULL if original input data. */ + PCRTFUZZMUTATOR pMutator; + /** Byte offset where the mutation starts. */ + uint64_t offMutation; + /** Size of the generated input data in bytes after the mutation was applied. */ + size_t cbInput; + /** Size of the mutation dependent data. */ + size_t cbMutation; + /** Size allocated for the input. */ + size_t cbAlloc; + /** Pointer to the input data if created. */ + void *pvInput; + /** Flag whether the mutation is contained in the tree of the context. */ + bool fInTree; + /** Flag whether the mutation input data is cached. */ + bool fCached; + /** Mutation dependent data, variable in size. */ + uint8_t abMutation[1]; +} RTFUZZMUTATION; + + +/** + * A fuzzing input seed. + */ +typedef struct RTFUZZINPUTINT +{ + /** Magic identifying this structure. */ + uint32_t u32Magic; + /** Reference counter. */ + volatile uint32_t cRefs; + /** The fuzzer this input belongs to. */ + PRTFUZZCTXINT pFuzzer; + /** The top mutation to work from (reference held). */ + PRTFUZZMUTATION pMutationTop; + /** Fuzzer context type dependent data. */ + union + { + /** Blob data. */ + struct + { + /** Pointer to the input data if created. */ + void *pvInput; + } Blob; + /** Stream state. */ + struct + { + /** Number of bytes seen so far. */ + size_t cbSeen; + } Stream; + } u; +} RTFUZZINPUTINT; +/** Pointer to the internal input state. */ +typedef RTFUZZINPUTINT *PRTFUZZINPUTINT; +/** Pointer to an internal input state pointer. */ +typedef PRTFUZZINPUTINT *PPRTFUZZINPUTINT; + + +/** + * The fuzzer state. + */ +typedef struct RTFUZZCTXINT +{ + /** Magic value for identification. */ + uint32_t u32Magic; + /** Reference counter. */ + volatile uint32_t cRefs; + /** The random number generator. */ + RTRAND hRand; + /** Fuzzing context type. */ + RTFUZZCTXTYPE enmType; + /** Semaphore protecting the mutations tree. */ + RTSEMRW hSemRwMutations; + /** The AVL tree for indexing the mutations (keyed by counter). */ + AVLU64TREE TreeMutations; + /** Number of inputs currently in the tree. */ + volatile uint64_t cMutations; + /** The maximum size of one input seed to generate. */ + size_t cbInputMax; + /** Behavioral flags. */ + uint32_t fFlagsBehavioral; + /** Number of enabled mutators. */ + uint32_t cMutators; + /** Pointer to the mutator descriptors. */ + PRTFUZZMUTATOR paMutators; + /** Maximum amount of bytes of mutated inputs to cache. */ + size_t cbMutationsAllocMax; + /** Current amount of bytes of cached mutated inputs. */ + size_t cbMutationsAlloc; + /** List of mutators having data allocated currently. */ + RTLISTANCHOR LstMutationsAlloc; + /** Critical section protecting the allocation list. */ + RTCRITSECT CritSectAlloc; + /** Total number of bytes of memory currently allocated in total for this context. */ + volatile size_t cbMemTotal; +} RTFUZZCTXINT; + + +/** + * The fuzzer state to be exported - all members are stored in little endian form. + */ +typedef struct RTFUZZCTXSTATE +{ + /** Magic value for identification. */ + uint32_t u32Magic; + /** Context type. */ + uint32_t uCtxType; + /** Size of the PRNG state following in bytes. */ + uint32_t cbPrng; + /** Number of mutator descriptors following. */ + uint32_t cMutators; + /** Number of mutation descriptors following. */ + uint32_t cMutations; + /** Behavioral flags. */ + uint32_t fFlagsBehavioral; + /** Maximum input size to generate. */ + uint64_t cbInputMax; +} RTFUZZCTXSTATE; +/** Pointer to a fuzzing context state. */ +typedef RTFUZZCTXSTATE *PRTFUZZCTXSTATE; + +/** BLOB context type. */ +#define RTFUZZCTX_STATE_TYPE_BLOB UINT32_C(0) +/** Stream context type. */ +#define RTFUZZCTX_STATE_TYPE_STREAM UINT32_C(1) + + +/** + * The fuzzer mutation state to be exported - all members are stored in little endian form. + */ +typedef struct RTFUZZMUTATIONSTATE +{ + /** The mutation identifier. */ + uint64_t u64Id; + /** The mutation identifier of the parent, 0 for no parent. */ + uint64_t u64IdParent; + /** The byte offset where the mutation starts. */ + uint64_t u64OffMutation; + /** Size of input data after mutation was applied. */ + uint64_t cbInput; + /** Size of mutation dependent data following. */ + uint64_t cbMutation; + /** The mutator ID. */ + uint32_t u32IdMutator; + /** The mutation level. */ + uint32_t iLvl; + /** Magic value for identification. */ + uint32_t u32Magic; +} RTFUZZMUTATIONSTATE; + + +/** + * Fuzzing context memory header. + */ +typedef struct RTFUZZMEMHDR +{ + /** Size of the memory area following. */ + size_t cb; +#if HC_ARCH_BITS == 32 + /** Some padding. */ + uint32_t uPadding0; +#elif HC_ARCH_BITS == 64 + /** Some padding. */ + uint64_t uPadding0; +#else +# error "Port me" +#endif +} RTFUZZMEMHDR; +/** Pointer to a memory header. */ +typedef RTFUZZMEMHDR *PRTFUZZMEMHDR; + + +/** + * Fuzzing context export AVL arguments. + */ +typedef struct RTFUZZEXPORTARGS +{ + /** Pointer to the export callback. */ + PFNRTFUZZCTXEXPORT pfnExport; + /** Opaque user data to pass to the callback. */ + void *pvUser; +} RTFUZZEXPORTARGS; +/** Pointer to the export arguments. */ +typedef RTFUZZEXPORTARGS *PRTFUZZEXPORTARGS; +/** Pointer to the constant export arguments. */ +typedef const RTFUZZEXPORTARGS *PCRTFUZZEXPORTARGS; + + +/** + * Integer replacing mutator additional data. + */ +typedef struct RTFUZZMUTATORINTEGER +{ + /** The integer class. */ + uint8_t uIntClass; + /** Flag whether to do a byte swap. */ + bool fByteSwap; + /** The index into the class specific array. */ + uint16_t idxInt; +} RTFUZZMUTATORINTEGER; +/** Pointer to additional integer replacing mutator data. */ +typedef RTFUZZMUTATORINTEGER *PRTFUZZMUTATORINTEGER; +/** Pointer to constant additional integer replacing mutator data. */ +typedef const RTFUZZMUTATORINTEGER *PCRTFUZZMUTATORINTEGER; + + +/********************************************************************************************************************************* +* Internal Functions * +*********************************************************************************************************************************/ +static DECLCALLBACK(int) rtFuzzCtxMutatorBitFlipPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation); +static DECLCALLBACK(int) rtFuzzCtxMutatorByteReplacePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation); +static DECLCALLBACK(int) rtFuzzCtxMutatorByteInsertPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation); +static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceInsertAppendPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation); +static DECLCALLBACK(int) rtFuzzCtxMutatorByteDeletePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation); +static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceDeletePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation); +static DECLCALLBACK(int) rtFuzzCtxMutatorIntegerReplacePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation); +static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation); + +static DECLCALLBACK(int) rtFuzzCtxMutatorCorpusExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf); +static DECLCALLBACK(int) rtFuzzCtxMutatorBitFlipExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf); +static DECLCALLBACK(int) rtFuzzCtxMutatorByteReplaceExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf); +static DECLCALLBACK(int) rtFuzzCtxMutatorByteInsertExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf); +static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceInsertAppendExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf); +static DECLCALLBACK(int) rtFuzzCtxMutatorByteDeleteExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf); +static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceDeleteExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf); +static DECLCALLBACK(int) rtFuzzCtxMutatorIntegerReplaceExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf); +static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf); + +static DECLCALLBACK(int) rtFuzzCtxMutatorExportDefault(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + PFNRTFUZZCTXEXPORT pfnExport, void *pvUser); +static DECLCALLBACK(int) rtFuzzCtxMutatorImportDefault(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, void *pvMutation, + PFNRTFUZZCTXIMPORT pfnImport, void *pvUser); + +static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverExport(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + PFNRTFUZZCTXEXPORT pfnExport, void *pvUser); +static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverImport(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, void *pvMutation, + PFNRTFUZZCTXIMPORT pfnImport, void *pvUser); + + +/********************************************************************************************************************************* +* Global Variables * +*********************************************************************************************************************************/ + +/** Signed 8bit interesting values. */ +static int8_t s_ai8Interesting[] = { INT8_MIN, INT8_MIN + 1, -1, 0, 1, INT8_MAX - 1, INT8_MAX }; +/** Unsigned 8bit interesting values. */ +static uint8_t s_au8Interesting[] = { 0, 1, UINT8_MAX - 1, UINT8_MAX }; +/** Signed 16bit interesting values. */ +static int16_t s_ai16Interesting[] = { INT16_MIN, INT16_MIN + 1, -1, 0, 1, INT16_MAX - 1, INT16_MAX }; +/** Unsigned 16bit interesting values. */ +static uint16_t s_au16Interesting[] = { 0, 1, UINT16_MAX - 1, UINT16_MAX }; +/** Signed 32bit interesting values. */ +static int32_t s_ai32Interesting[] = { INT32_MIN, INT32_MIN + 1, -1, 0, 1, INT32_MAX - 1, INT32_MAX }; +/** Unsigned 32bit interesting values. */ +static uint32_t s_au32Interesting[] = { 0, 1, UINT32_MAX - 1, UINT32_MAX }; +/** Signed 64bit interesting values. */ +static int64_t s_ai64Interesting[] = { INT64_MIN, INT64_MIN + 1, -1, 0, 1, INT64_MAX - 1, INT64_MAX }; +/** Unsigned 64bit interesting values. */ +static uint64_t s_au64Interesting[] = { 0, 1, UINT64_MAX - 1, UINT64_MAX }; + + +/** + * The special corpus mutator for the original data. + */ +static RTFUZZMUTATOR const g_MutatorCorpus = +{ + /** pszId */ + "Corpus", + /** pszDesc */ + "Special mutator, which is assigned to the initial corpus", + /** uMutator. */ + RTFUZZMUTATOR_ID_CORPUS, + /** enmClass. */ + RTFUZZMUTATORCLASS_BYTES, + /** fFlags */ + RTFUZZMUTATOR_F_DEFAULT, + /** pfnPrep */ + NULL, + /** pfnExec */ + rtFuzzCtxMutatorCorpusExec, + /** pfnExport */ + rtFuzzCtxMutatorExportDefault, + /** pfnImport */ + rtFuzzCtxMutatorImportDefault +}; + +/** + * Array of all available mutators. + */ +static RTFUZZMUTATOR const g_aMutators[] = +{ + /* pszId pszDesc uMutator enmClass fFlags pfnPrep pfnExec pfnExport pfnImport */ + { "BitFlip", "Flips a single bit in the input", 0, RTFUZZMUTATORCLASS_BITS, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorBitFlipPrep, rtFuzzCtxMutatorBitFlipExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault }, + { "ByteReplace", "Replaces a single byte in the input", 1, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorByteReplacePrep, rtFuzzCtxMutatorByteReplaceExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault }, + { "ByteInsert", "Inserts a single byte sequence into the input", 2, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorByteInsertPrep, rtFuzzCtxMutatorByteInsertExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault }, + { "ByteSeqIns", "Inserts a byte sequence in the input", 3, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorByteSequenceInsertAppendPrep, rtFuzzCtxMutatorByteSequenceInsertAppendExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault }, + { "ByteSeqApp", "Appends a byte sequence to the input", 4, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_END_OF_BUF, rtFuzzCtxMutatorByteSequenceInsertAppendPrep, rtFuzzCtxMutatorByteSequenceInsertAppendExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault }, + { "ByteDelete", "Deletes a single byte sequence from the input", 5, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorByteDeletePrep, rtFuzzCtxMutatorByteDeleteExec, NULL, NULL }, + { "ByteSeqDel", "Deletes a byte sequence from the input", 6, RTFUZZMUTATORCLASS_BYTES, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorByteSequenceDeletePrep, rtFuzzCtxMutatorByteSequenceDeleteExec, NULL, NULL }, + { "IntReplace", "Replaces a possible integer with an interesting one", 7, RTFUZZMUTATORCLASS_INTEGERS, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorIntegerReplacePrep, rtFuzzCtxMutatorIntegerReplaceExec, rtFuzzCtxMutatorExportDefault, rtFuzzCtxMutatorImportDefault }, + { "MutCrossover", "Creates a crossover of two other mutations", 8, RTFUZZMUTATORCLASS_MUTATORS, RTFUZZMUTATOR_F_DEFAULT, rtFuzzCtxMutatorCrossoverPrep, rtFuzzCtxMutatorCrossoverExec, rtFuzzCtxMutatorCrossoverExport, rtFuzzCtxMutatorCrossoverImport } +}; + + +/** + * Allocates the given number of bytes. + * + * @returns Pointer to the allocated memory + * @param pThis The fuzzer context instance. + * @param cb How much to allocate. + */ +static void *rtFuzzCtxMemoryAlloc(PRTFUZZCTXINT pThis, size_t cb) +{ + AssertReturn(cb > 0, NULL); + + PRTFUZZMEMHDR pMemHdr = (PRTFUZZMEMHDR)RTMemAllocZ(cb + sizeof(RTFUZZMEMHDR)); + if (RT_LIKELY(pMemHdr)) + { + pMemHdr->cb = cb; + size_t cbIgn = ASMAtomicAddZ(&pThis->cbMemTotal, cb + sizeof(RTFUZZMEMHDR)); RT_NOREF(cbIgn); + return pMemHdr + 1; + } + + return NULL; +} + + +/** + * Frees the given memory. + * + * @returns nothing. + * @param pThis The fuzzer context instance. + * @param pv Pointer to the memory area to free. + */ +static void rtFuzzCtxMemoryFree(PRTFUZZCTXINT pThis, void *pv) +{ + AssertReturnVoid(pv != NULL); + PRTFUZZMEMHDR pMemHdr = ((PRTFUZZMEMHDR)pv) - 1; + + size_t cbIgn = ASMAtomicSubZ(&pThis->cbMemTotal, pMemHdr->cb + sizeof(RTFUZZMEMHDR)); RT_NOREF(cbIgn); + RTMemFree(pMemHdr); +} + + +/** + * Frees the cached inputs until the given amount is free. + * + * @returns Whether the amount of memory is free. + * @param pThis The fuzzer context instance. + * @param cb How many bytes to reclaim + */ +static bool rtFuzzCtxMutationAllocReclaim(PRTFUZZCTXINT pThis, size_t cb) +{ + while ( !RTListIsEmpty(&pThis->LstMutationsAlloc) + && pThis->cbMutationsAlloc + cb > pThis->cbMutationsAllocMax) + { + PRTFUZZMUTATION pMutation = RTListGetLast(&pThis->LstMutationsAlloc, RTFUZZMUTATION, NdAlloc); + AssertPtr(pMutation); + AssertPtr(pMutation->pvInput); + + rtFuzzCtxMemoryFree(pThis, pMutation->pvInput); + pThis->cbMutationsAlloc -= pMutation->cbAlloc; + pMutation->pvInput = NULL; + pMutation->cbAlloc = 0; + pMutation->fCached = false; + RTListNodeRemove(&pMutation->NdAlloc); + } + + return pThis->cbMutationsAlloc + cb <= pThis->cbMutationsAllocMax; +} + + +/** + * Updates the cache status of the given mutation. + * + * @returns nothing. + * @param pThis The fuzzer context instance. + * @param pMutation The mutation to update. + */ +static void rtFuzzCtxMutationMaybeEnterCache(PRTFUZZCTXINT pThis, PRTFUZZMUTATION pMutation) +{ + RTCritSectEnter(&pThis->CritSectAlloc); + + /* Initial corpus mutations are not freed. */ + if ( pMutation->pvInput + && pMutation->pMutator != &g_MutatorCorpus) + { + Assert(!pMutation->fCached); + + if (rtFuzzCtxMutationAllocReclaim(pThis, pMutation->cbAlloc)) + { + RTListPrepend(&pThis->LstMutationsAlloc, &pMutation->NdAlloc); + pThis->cbMutationsAlloc += pMutation->cbAlloc; + pMutation->fCached = true; + } + else + { + rtFuzzCtxMemoryFree(pThis, pMutation->pvInput); + pMutation->pvInput = NULL; + pMutation->cbAlloc = 0; + pMutation->fCached = false; + } + } + RTCritSectLeave(&pThis->CritSectAlloc); +} + + +/** + * Removes a cached mutation from the cache. + * + * @returns nothing. + * @param pThis The fuzzer context instance. + * @param pMutation The mutation to remove. + */ +static void rtFuzzCtxMutationCacheRemove(PRTFUZZCTXINT pThis, PRTFUZZMUTATION pMutation) +{ + RTCritSectEnter(&pThis->CritSectAlloc); + if (pMutation->fCached) + { + RTListNodeRemove(&pMutation->NdAlloc); + pThis->cbMutationsAlloc -= pMutation->cbAlloc; + pMutation->fCached = false; + } + RTCritSectLeave(&pThis->CritSectAlloc); +} + + +/** + * Destroys the given mutation. + * + * @returns nothing. + * @param pMutation The mutation to destroy. + */ +static void rtFuzzMutationDestroy(PRTFUZZMUTATION pMutation) +{ + if (pMutation->pvInput) + { + rtFuzzCtxMemoryFree(pMutation->pFuzzer, pMutation->pvInput); + if (pMutation->fCached) + { + RTCritSectEnter(&pMutation->pFuzzer->CritSectAlloc); + RTListNodeRemove(&pMutation->NdAlloc); + pMutation->pFuzzer->cbMutationsAlloc -= pMutation->cbAlloc; + RTCritSectLeave(&pMutation->pFuzzer->CritSectAlloc); + } + pMutation->pvInput = NULL; + pMutation->cbAlloc = 0; + pMutation->fCached = false; + } + rtFuzzCtxMemoryFree(pMutation->pFuzzer, pMutation); +} + + +/** + * Retains an external reference to the given mutation. + * + * @returns New reference count on success. + * @param pMutation The mutation to retain. + */ +static uint32_t rtFuzzMutationRetain(PRTFUZZMUTATION pMutation) +{ + uint32_t cRefs = ASMAtomicIncU32(&pMutation->cRefs); + AssertMsg( ( cRefs > 1 + || pMutation->fInTree) + && cRefs < _1M, ("%#x %p\n", cRefs, pMutation)); + + if (cRefs == 1) + rtFuzzCtxMutationCacheRemove(pMutation->pFuzzer, pMutation); + return cRefs; +} + + +/** + * Releases an external reference from the given mutation. + * + * @returns New reference count on success. + * @param pMutation The mutation to retain. + */ +static uint32_t rtFuzzMutationRelease(PRTFUZZMUTATION pMutation) +{ + uint32_t cRefs = ASMAtomicDecU32(&pMutation->cRefs); + AssertMsg(cRefs < _1M, ("%#x %p\n", cRefs, pMutation)); + + if (cRefs == 0) + { + if (!pMutation->fInTree) + rtFuzzMutationDestroy(pMutation); + else + rtFuzzCtxMutationMaybeEnterCache(pMutation->pFuzzer, pMutation); + } + + return cRefs; +} + + +/** + * Adds the given mutation to the corpus of the given fuzzer context. + * + * @returns IPRT status code. + * @param pThis The fuzzer context instance. + * @param pMutation The mutation to add. + */ +static int rtFuzzCtxMutationAdd(PRTFUZZCTXINT pThis, PRTFUZZMUTATION pMutation) +{ + int rc = VINF_SUCCESS; + + pMutation->Core.Key = ASMAtomicIncU64(&pThis->cMutations); + rc = RTSemRWRequestWrite(pThis->hSemRwMutations, RT_INDEFINITE_WAIT); + AssertRC(rc); RT_NOREF(rc); + bool fIns = RTAvlU64Insert(&pThis->TreeMutations, &pMutation->Core); + Assert(fIns); RT_NOREF(fIns); + rc = RTSemRWReleaseWrite(pThis->hSemRwMutations); + AssertRC(rc); RT_NOREF(rc); + + pMutation->fInTree = true; + return rc; +} + + +/** + * Locates the mutation with the given key. + * + * @returns Pointer to the mutation if found or NULL otherwise. + * @param pThis The fuzzer context instance. + * @param uKey The key to locate. + */ +static PRTFUZZMUTATION rtFuzzCtxMutationLocate(PRTFUZZCTXINT pThis, uint64_t uKey) +{ + int rc = RTSemRWRequestRead(pThis->hSemRwMutations, RT_INDEFINITE_WAIT); + AssertRC(rc); RT_NOREF(rc); + + /* + * Using best fit getter here as there might be a racing mutation insertion and the mutation counter has increased + * already but the mutation is not yet in the tree. + */ + PRTFUZZMUTATION pMutation = (PRTFUZZMUTATION)RTAvlU64GetBestFit(&pThis->TreeMutations, uKey, false /*fAbove*/); + if (RT_LIKELY(pMutation)) + rtFuzzMutationRetain(pMutation); + + rc = RTSemRWReleaseRead(pThis->hSemRwMutations); + AssertRC(rc); RT_NOREF(rc); + + return pMutation; +} + + +/** + * Returns a random mutation from the corpus of the given fuzzer context. + * + * @returns Pointer to a randomly picked mutation (reference count is increased). + * @param pThis The fuzzer context instance. + */ +static PRTFUZZMUTATION rtFuzzCtxMutationPickRnd(PRTFUZZCTXINT pThis) +{ + uint64_t idxMutation = RTRandAdvU64Ex(pThis->hRand, 1, ASMAtomicReadU64(&pThis->cMutations)); + return rtFuzzCtxMutationLocate(pThis, idxMutation); +} + + +/** + * Creates a new mutation capable of holding the additional number of bytes. + * + * @returns Pointer to the newly created mutation or NULL if out of memory. + * @param pThis The fuzzer context instance. + * @param offMutation The starting offset for the mutation. + * @param pMutationParent The parent mutation, can be NULL. + * @param cbAdditional Additional number of bytes to allocate after the core structure. + * @param ppvMutation Where to store the pointer to the mutation dependent data on success. + */ +static PRTFUZZMUTATION rtFuzzMutationCreate(PRTFUZZCTXINT pThis, uint64_t offMutation, PRTFUZZMUTATION pMutationParent, + size_t cbAdditional, void **ppvMutation) +{ + PRTFUZZMUTATION pMutation = (PRTFUZZMUTATION)rtFuzzCtxMemoryAlloc(pThis, sizeof(RTFUZZMUTATION) + cbAdditional); + if (RT_LIKELY(pMutation)) + { + pMutation->u32Magic = 0; /** @todo */ + pMutation->pFuzzer = pThis; + pMutation->cRefs = 1; + pMutation->iLvl = 0; + pMutation->offMutation = offMutation; + pMutation->pMutationParent = pMutationParent; + pMutation->cbMutation = cbAdditional; + pMutation->fInTree = false; + pMutation->fCached = false; + pMutation->pvInput = NULL; + pMutation->cbInput = 0; + pMutation->cbAlloc = 0; + + if (pMutationParent) + pMutation->iLvl = pMutationParent->iLvl + 1; + if (ppvMutation) + *ppvMutation = &pMutation->abMutation[0]; + } + + return pMutation; +} + + +/** + * Destroys the given fuzzer context freeing all allocated resources. + * + * @returns nothing. + * @param pThis The fuzzer context instance. + */ +static void rtFuzzCtxDestroy(PRTFUZZCTXINT pThis) +{ + RT_NOREF(pThis); +} + + +/** + * Creates the final input data applying all accumulated mutations. + * + * @returns IPRT status code. + * @param pMutation The mutation to finalize. + */ +static int rtFuzzMutationDataFinalize(PRTFUZZMUTATION pMutation) +{ + if (pMutation->pvInput) + return VINF_SUCCESS; + + /* Traverse the mutations top to bottom and insert into the array. */ + int rc = VINF_SUCCESS; + uint32_t idx = pMutation->iLvl + 1; + PRTFUZZMUTATION *papMutations = (PRTFUZZMUTATION *)RTMemTmpAlloc(idx * sizeof(PCRTFUZZMUTATION)); + if (RT_LIKELY(papMutations)) + { + PRTFUZZMUTATION pMutationCur = pMutation; + size_t cbAlloc = 0; + + /* + * As soon as a mutation with allocated input data is encountered the insertion is + * stopped as it contains all necessary mutated inputs we can start from. + */ + while (idx > 0) + { + rtFuzzMutationRetain(pMutationCur); + papMutations[idx - 1] = pMutationCur; + cbAlloc = RT_MAX(cbAlloc, pMutationCur->cbInput); + if (pMutationCur->pvInput) + { + idx--; + break; + } + pMutationCur = pMutationCur->pMutationParent; + idx--; + } + + pMutation->cbAlloc = cbAlloc; + uint8_t *pbBuf = (uint8_t *)rtFuzzCtxMemoryAlloc(pMutation->pFuzzer, cbAlloc); + if (RT_LIKELY(pbBuf)) + { + pMutation->pvInput = pbBuf; + + /* Copy the initial input data. */ + size_t cbInputNow = papMutations[idx]->cbInput; + memcpy(pbBuf, papMutations[idx]->pvInput, cbInputNow); + rtFuzzMutationRelease(papMutations[idx]); + + for (uint32_t i = idx + 1; i < pMutation->iLvl + 1; i++) + { + PRTFUZZMUTATION pCur = papMutations[i]; + pCur->pMutator->pfnExec(pCur->pFuzzer, pCur, (void *)&pCur->abMutation[0], + pbBuf + pCur->offMutation, + cbInputNow - pCur->offMutation); + + cbInputNow = pCur->cbInput; + rtFuzzMutationRelease(pCur); + } + + Assert(cbInputNow == pMutation->cbInput); + } + else + rc = VERR_NO_MEMORY; + + RTMemTmpFree(papMutations); + } + else + rc = VERR_NO_MEMORY; + + return rc; +} + + +/** + * Default mutator export callback (just writing the raw data). + */ +static DECLCALLBACK(int) rtFuzzCtxMutatorExportDefault(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + PFNRTFUZZCTXEXPORT pfnExport, void *pvUser) +{ + return pfnExport(pThis, pvMutation, pMutation->cbMutation, pvUser); +} + + +/** + * Default mutator import callback (just reading the raw data). + */ +static DECLCALLBACK(int) rtFuzzCtxMutatorImportDefault(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, void *pvMutation, + PFNRTFUZZCTXIMPORT pfnImport, void *pvUser) +{ + return pfnImport(pThis, pvMutation, pMutation->cbMutation, NULL, pvUser); +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorCorpusExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf) +{ + RT_NOREF(pThis, cbBuf, pvMutation); + memcpy(pbBuf, pvMutation, pMutation->cbInput); + return VINF_SUCCESS; +} + + +/** + * Mutator callback - flips a single bit in the input. + */ +static DECLCALLBACK(int) rtFuzzCtxMutatorBitFlipPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation) +{ + int rc = VINF_SUCCESS; + uint8_t *pidxBitFlip = 0; + PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, sizeof(*pidxBitFlip), (void **)&pidxBitFlip); + if (RT_LIKELY(pMutation)) + { + pMutation->cbInput = pMutationParent->cbInput; /* Bit flips don't change the input size. */ + *pidxBitFlip = (uint8_t)RTRandAdvU32Ex(pThis->hRand, 0, sizeof(uint8_t) * 8 - 1); + *ppMutation = pMutation; + } + else + rc = VERR_NO_MEMORY; + + return rc; +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorBitFlipExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf) +{ + RT_NOREF(pThis, cbBuf, pMutation); + uint8_t idxBitFlip = *(uint8_t *)pvMutation; + ASMBitToggle(pbBuf, idxBitFlip); + return VINF_SUCCESS; +} + + +/** + * Mutator callback - replaces a single byte in the input. + */ +static DECLCALLBACK(int) rtFuzzCtxMutatorByteReplacePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation) +{ + int rc = VINF_SUCCESS; + uint8_t *pbReplace = 0; + PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, sizeof(*pbReplace), (void **)&pbReplace); + if (RT_LIKELY(pMutation)) + { + pMutation->cbInput = pMutationParent->cbInput; /* Byte replacements don't change the input size. */ + RTRandAdvBytes(pThis->hRand, pbReplace, 1); /** @todo Filter out same values. */ + *ppMutation = pMutation; + } + else + rc = VERR_NO_MEMORY; + + return rc; +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorByteReplaceExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf) +{ + RT_NOREF(pThis, cbBuf, pMutation); + uint8_t bReplace = *(uint8_t *)pvMutation; + *pbBuf = bReplace; + return VINF_SUCCESS; +} + + +/** + * Mutator callback - inserts a single byte into the input. + */ +static DECLCALLBACK(int) rtFuzzCtxMutatorByteInsertPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation) +{ + int rc = VINF_SUCCESS; + uint8_t *pbInsert = 0; + if (pMutationParent->cbInput < pThis->cbInputMax) + { + PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, 1 /*cbAdditional*/, (void **)&pbInsert); + if (RT_LIKELY(pMutation)) + { + pMutation->cbInput = pMutationParent->cbInput + 1; + RTRandAdvBytes(pThis->hRand, pbInsert, 1); + *ppMutation = pMutation; + } + else + rc = VERR_NO_MEMORY; + } + + return rc; +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorByteInsertExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf) +{ + RT_NOREF(pThis, pMutation, pvMutation); + + /* Just move the residual data one byte to the back. */ + memmove(pbBuf + 1, pbBuf, cbBuf); + *pbBuf = *(uint8_t *)pvMutation; + return VINF_SUCCESS; +} + + +/** + * Mutator callback - inserts a byte sequence into the input. + */ +static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceInsertAppendPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation) +{ + int rc = VINF_SUCCESS; + if (pMutationParent->cbInput < pThis->cbInputMax) + { + size_t cbInputMutated = (size_t)RTRandAdvU64Ex(pThis->hRand, pMutationParent->cbInput + 1, pThis->cbInputMax); + size_t cbInsert = cbInputMutated - pMutationParent->cbInput; + uint8_t *pbAdd = NULL; + + PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, cbInsert, (void **)&pbAdd); + if (RT_LIKELY(pMutation)) + { + pMutation->cbInput = cbInputMutated; + RTRandAdvBytes(pThis->hRand, pbAdd, cbInsert); + *ppMutation = pMutation; + } + else + rc = VERR_NO_MEMORY; + } + + return rc; +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceInsertAppendExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf) +{ + RT_NOREF(pThis); + size_t cbInsert = pMutation->cbInput - pMutation->pMutationParent->cbInput; + + /* Move any remaining data to the end. */ + if (cbBuf) + memmove(pbBuf + cbInsert, pbBuf, cbBuf); + + memcpy(pbBuf, pvMutation, cbInsert); + return VINF_SUCCESS; +} + + +/** + * Mutator callback - deletes a single byte in the input. + */ +static DECLCALLBACK(int) rtFuzzCtxMutatorByteDeletePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation) +{ + int rc = VINF_SUCCESS; + if (pMutationParent->cbInput - offStart >= 1) + { + PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, 0 /*cbAdditional*/, NULL); + if (RT_LIKELY(pMutation)) + { + pMutation->cbInput = pMutationParent->cbInput - 1; + *ppMutation = pMutation; + } + else + rc = VERR_NO_MEMORY; + } + + return rc; +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorByteDeleteExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf) +{ + RT_NOREF(pThis, pMutation, pvMutation); + + /* Just move the residual data to the front. */ + memmove(pbBuf, pbBuf + 1, cbBuf - 1); + return VINF_SUCCESS; +} + + +/** + * Mutator callback - deletes a byte sequence in the input. + */ +static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceDeletePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation) +{ + int rc = VINF_SUCCESS; + if ( pMutationParent->cbInput > offStart + && pMutationParent->cbInput > 1) + { + size_t cbInputMutated = (size_t)RTRandAdvU64Ex(pThis->hRand, offStart, pMutationParent->cbInput - 1); + + PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, 0 /*cbAdditional*/, NULL); + if (RT_LIKELY(pMutation)) + { + pMutation->cbInput = cbInputMutated; + *ppMutation = pMutation; + } + else + rc = VERR_NO_MEMORY; + } + + return rc; +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorByteSequenceDeleteExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf) +{ + RT_NOREF(pThis, pvMutation); + Assert(pMutation->pMutationParent->cbInput > pMutation->cbInput); + size_t cbDel = pMutation->pMutationParent->cbInput - pMutation->cbInput; + + /* Just move the residual data to the front. */ + memmove(pbBuf, pbBuf + cbDel, cbBuf - cbDel); + return VINF_SUCCESS; +} + + +/** + * Mutator callback - replaces a possible integer with something interesting. + */ +static DECLCALLBACK(int) rtFuzzCtxMutatorIntegerReplacePrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation) +{ + int rc = VINF_SUCCESS; + PRTFUZZMUTATORINTEGER pMutInt = NULL; + PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, sizeof(*pMutInt), (void **)&pMutInt); + if (RT_LIKELY(pMutation)) + { + size_t cbLeft = pMutationParent->cbInput - offStart; + uint32_t uClassMax = 0; + + switch (cbLeft) + { + case 1: + uClassMax = 1; + break; + case 2: + case 3: + uClassMax = 3; + break; + case 4: + case 5: + case 6: + case 7: + uClassMax = 5; + break; + default: + uClassMax = 7; + break; + } + + pMutInt->uIntClass = (uint8_t)RTRandAdvU32Ex(pThis->hRand, 0, uClassMax); + pMutInt->fByteSwap = RT_BOOL(RTRandAdvU32Ex(pThis->hRand, 0, 1)); + + switch (pMutInt->uIntClass) + { + case 0: + pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_ai8Interesting) - 1); + break; + case 1: + pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_au8Interesting) - 1); + break; + case 2: + pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_ai16Interesting) - 1); + break; + case 3: + pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_au16Interesting) - 1); + break; + case 4: + pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_ai32Interesting) - 1); + break; + case 5: + pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_au32Interesting) - 1); + break; + case 6: + pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_ai64Interesting) - 1); + break; + case 7: + pMutInt->idxInt = (uint16_t)RTRandAdvU32Ex(pThis->hRand, 0, RT_ELEMENTS(s_au64Interesting) - 1); + break; + default: + AssertReleaseFailed(); + } + + pMutation->cbInput = pMutationParent->cbInput; + *ppMutation = pMutation; + } + else + rc = VERR_NO_MEMORY; + + return rc; +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorIntegerReplaceExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf) +{ + RT_NOREF(pThis, pMutation, cbBuf); + union + { + int8_t i8; + uint8_t u8; + int16_t i16; + uint16_t u16; + int32_t i32; + uint32_t u32; + int64_t i64; + uint64_t u64; + } Int; + PCRTFUZZMUTATORINTEGER pMutInt = (PCRTFUZZMUTATORINTEGER)pvMutation; + size_t cb = 0; + + switch (pMutInt->uIntClass) + { + case 0: + Int.i8 = s_ai8Interesting[pMutInt->idxInt]; + cb = 1; + break; + case 1: + Int.u8 = s_au8Interesting[pMutInt->idxInt]; + cb = 1; + break; + case 2: + Int.i16 = s_ai16Interesting[pMutInt->idxInt]; + cb = 2; + if (pMutInt->fByteSwap) + Int.u16 = RT_BSWAP_U16(Int.u16); + break; + case 3: + Int.u16 = s_au16Interesting[pMutInt->idxInt]; + cb = 2; + if (pMutInt->fByteSwap) + Int.u16 = RT_BSWAP_U16(Int.u16); + break; + case 4: + Int.i32 = s_ai32Interesting[pMutInt->idxInt]; + cb = 4; + if (pMutInt->fByteSwap) + Int.u32 = RT_BSWAP_U32(Int.u32); + break; + case 5: + Int.u32 = s_au32Interesting[pMutInt->idxInt]; + cb = 4; + if (pMutInt->fByteSwap) + Int.u32 = RT_BSWAP_U32(Int.u32); + break; + case 6: + Int.i64 = s_ai64Interesting[pMutInt->idxInt]; + cb = 8; + if (pMutInt->fByteSwap) + Int.u64 = RT_BSWAP_U64(Int.u64); + break; + case 7: + Int.u64 = s_au64Interesting[pMutInt->idxInt]; + cb = 8; + if (pMutInt->fByteSwap) + Int.u64 = RT_BSWAP_U64(Int.u64); + break; + default: + AssertReleaseFailed(); + } + + memcpy(pbBuf, &Int, cb); + return VINF_SUCCESS; +} + + +/** + * Mutator callback - crosses over two mutations at the given point. + */ +static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverPrep(PRTFUZZCTXINT pThis, uint64_t offStart, PRTFUZZMUTATION pMutationParent, + PPRTFUZZMUTATION ppMutation) +{ + int rc = VINF_SUCCESS; + + if (pThis->cMutations > 1) + { + uint64_t *pidxMutCrossover = NULL; + PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, offStart, pMutationParent, sizeof(*pidxMutCrossover), (void **)&pidxMutCrossover); + if (RT_LIKELY(pMutation)) + { + uint32_t cTries = 10; + PRTFUZZMUTATION pMutCrossover = NULL; + /* + * Pick a random mutation to crossover with (making sure it is not the current one + * or the crossover point is beyond the end of input). + */ + do + { + if (pMutCrossover) + rtFuzzMutationRelease(pMutCrossover); + pMutCrossover = rtFuzzCtxMutationPickRnd(pThis); + cTries--; + } while ( ( pMutCrossover == pMutationParent + || offStart >= pMutCrossover->cbInput) + && cTries > 0); + + if (cTries) + { + pMutation->cbInput = pMutCrossover->cbInput; + *pidxMutCrossover = pMutCrossover->Core.Key; + *ppMutation = pMutation; + } + else + rtFuzzMutationDestroy(pMutation); + + rtFuzzMutationRelease(pMutCrossover); + } + else + rc = VERR_NO_MEMORY; + } + + return rc; +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverExec(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + uint8_t *pbBuf, size_t cbBuf) +{ + RT_NOREF(cbBuf); + uint64_t idxMutCrossover = *(uint64_t *)pvMutation; + + PRTFUZZMUTATION pMutCrossover = rtFuzzCtxMutationLocate(pThis, idxMutCrossover); + int rc = rtFuzzMutationDataFinalize(pMutCrossover); + if (RT_SUCCESS(rc)) + { + memcpy(pbBuf, (uint8_t *)pMutCrossover->pvInput + pMutation->offMutation, + pMutCrossover->cbInput - pMutation->offMutation); + rtFuzzMutationRelease(pMutCrossover); + } + + return rc; +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverExport(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, const void *pvMutation, + PFNRTFUZZCTXEXPORT pfnExport, void *pvUser) +{ + RT_NOREF(pMutation); + + uint64_t idxMutCrossover = *(uint64_t *)pvMutation; + idxMutCrossover = RT_H2LE_U64(idxMutCrossover); + return pfnExport(pThis, &idxMutCrossover, sizeof(idxMutCrossover), pvUser); +} + + +static DECLCALLBACK(int) rtFuzzCtxMutatorCrossoverImport(PRTFUZZCTXINT pThis, PCRTFUZZMUTATION pMutation, void *pvMutation, + PFNRTFUZZCTXIMPORT pfnImport, void *pvUser) +{ + RT_NOREF(pMutation); + + uint64_t uKey = 0; + int rc = pfnImport(pThis, &uKey, sizeof(uKey), NULL, pvUser); + if (RT_SUCCESS(rc)) + { + uKey = RT_LE2H_U64(uKey); + *(uint64_t *)pvMutation = uKey; + } + + return rc; +} + + +/** + * Creates an empty fuzzing context. + * + * @returns IPRT status code. + * @param ppThis Where to store the pointer to the internal fuzzing context instance on success. + * @param enmType Fuzzing context type. + */ +static int rtFuzzCtxCreateEmpty(PRTFUZZCTXINT *ppThis, RTFUZZCTXTYPE enmType) +{ + int rc; + PRTFUZZCTXINT pThis = (PRTFUZZCTXINT)RTMemAllocZ(sizeof(*pThis)); + if (RT_LIKELY(pThis)) + { + pThis->u32Magic = RTFUZZCTX_MAGIC; + pThis->cRefs = 1; + pThis->enmType = enmType; + pThis->TreeMutations = NULL; + pThis->cbInputMax = UINT32_MAX; + pThis->cMutations = 0; + pThis->fFlagsBehavioral = 0; + pThis->cbMutationsAllocMax = _1G; + pThis->cbMemTotal = 0; + RTListInit(&pThis->LstMutationsAlloc); + + /* Copy the default mutator descriptors over. */ + pThis->paMutators = (PRTFUZZMUTATOR)RTMemAllocZ(RT_ELEMENTS(g_aMutators) * sizeof(RTFUZZMUTATOR)); + if (RT_LIKELY(pThis->paMutators)) + { + pThis->cMutators = RT_ELEMENTS(g_aMutators); + memcpy(&pThis->paMutators[0], &g_aMutators[0], RT_ELEMENTS(g_aMutators) * sizeof(RTFUZZMUTATOR)); + + rc = RTSemRWCreate(&pThis->hSemRwMutations); + if (RT_SUCCESS(rc)) + { + rc = RTCritSectInit(&pThis->CritSectAlloc); + if (RT_SUCCESS(rc)) + { + rc = RTRandAdvCreateParkMiller(&pThis->hRand); + if (RT_SUCCESS(rc)) + { + RTRandAdvSeed(pThis->hRand, RTTimeSystemNanoTS()); + *ppThis = pThis; + return VINF_SUCCESS; + } + + RTCritSectDelete(&pThis->CritSectAlloc); + } + + RTSemRWDestroy(pThis->hSemRwMutations); + } + } + else + rc = VERR_NO_MEMORY; + + RTMemFree(pThis); + } + else + rc = VERR_NO_MEMORY; + + return rc; +} + + +/** + * Destroys the given fuzzing input. + * + * @returns nothing. + * @param pThis The fuzzing input to destroy. + */ +static void rtFuzzInputDestroy(PRTFUZZINPUTINT pThis) +{ + PRTFUZZCTXINT pFuzzer = pThis->pFuzzer; + + rtFuzzMutationRelease(pThis->pMutationTop); + rtFuzzCtxMemoryFree(pFuzzer, pThis); + RTFuzzCtxRelease(pFuzzer); +} + + +RTDECL(int) RTFuzzCtxCreate(PRTFUZZCTX phFuzzCtx, RTFUZZCTXTYPE enmType) +{ + AssertPtrReturn(phFuzzCtx, VERR_INVALID_POINTER); + + return rtFuzzCtxCreateEmpty(phFuzzCtx, enmType); +} + + +RTDECL(int) RTFuzzCtxCreateFromState(PRTFUZZCTX phFuzzCtx, PFNRTFUZZCTXIMPORT pfnImport, void *pvUser) +{ + AssertPtrReturn(phFuzzCtx, VERR_INVALID_POINTER); + AssertPtrReturn(pfnImport, VERR_INVALID_POINTER); + +#if 0 + int rc = VINF_SUCCESS; + if (cbState >= sizeof(RTFUZZCTXSTATE)) + { + RTFUZZCTXSTATE StateImport; + + memcpy(&StateImport, pvState, sizeof(RTFUZZCTXSTATE)); + if ( RT_LE2H_U32(StateImport.u32Magic) == RTFUZZCTX_MAGIC + && RT_LE2H_U32(StateImport.cbPrng) <= cbState - sizeof(RTFUZZCTXSTATE)) + { + PRTFUZZCTXINT pThis = rtFuzzCtxCreateEmpty(); + if (RT_LIKELY(pThis)) + { + pThis->cbInputMax = (size_t)RT_LE2H_U64(StateImport.cbInputMax); + pThis->fFlagsBehavioral = RT_LE2H_U32(StateImport.fFlagsBehavioral); + + uint8_t *pbState = (uint8_t *)pvState; + uint32_t cInputs = RT_LE2H_U32(StateImport.cInputs); + rc = RTRandAdvRestoreState(pThis->hRand, (const char *)&pbState[sizeof(RTFUZZCTXSTATE)]); + if (RT_SUCCESS(rc)) + { + /* Go through the inputs and add them. */ + pbState += sizeof(RTFUZZCTXSTATE) + RT_LE2H_U32(StateImport.cbPrng); + cbState -= sizeof(RTFUZZCTXSTATE) + RT_LE2H_U32(StateImport.cbPrng); + + uint32_t idx = 0; + while ( idx < cInputs + && RT_SUCCESS(rc)) + { + size_t cbInput = 0; + if (cbState >= sizeof(uint32_t)) + { + memcpy(&cbInput, pbState, sizeof(uint32_t)); + cbInput = RT_LE2H_U32(cbInput); + pbState += sizeof(uint32_t); + } + + if ( cbInput + && cbInput <= cbState) + { + PRTFUZZINPUTINT pInput = rtFuzzCtxInputCreate(pThis, cbInput); + if (RT_LIKELY(pInput)) + { + memcpy(&pInput->abInput[0], pbState, cbInput); + RTMd5(&pInput->abInput[0], pInput->cbInput, &pInput->abMd5Hash[0]); + rc = rtFuzzCtxInputAdd(pThis, pInput); + if (RT_FAILURE(rc)) + RTMemFree(pInput); + pbState += cbInput; + } + } + else + rc = VERR_INVALID_STATE; + + idx++; + } + + if (RT_SUCCESS(rc)) + { + *phFuzzCtx = pThis; + return VINF_SUCCESS; + } + } + + rtFuzzCtxDestroy(pThis); + } + else + rc = VERR_NO_MEMORY; + } + else + rc = VERR_INVALID_MAGIC; + } + else + rc = VERR_INVALID_MAGIC; + + return rc; +#else + RT_NOREF(pvUser); + return VERR_NOT_IMPLEMENTED; +#endif +} + + +RTDECL(int) RTFuzzCtxCreateFromStateMem(PRTFUZZCTX phFuzzCtx, const void *pvState, size_t cbState) +{ + AssertPtrReturn(phFuzzCtx, VERR_INVALID_POINTER); + AssertPtrReturn(pvState, VERR_INVALID_POINTER); + AssertPtrReturn(cbState, VERR_INVALID_POINTER); + + return VERR_NOT_IMPLEMENTED; +} + + +RTDECL(int) RTFuzzCtxCreateFromStateFile(PRTFUZZCTX phFuzzCtx, const char *pszFilename) +{ + AssertPtrReturn(phFuzzCtx, VERR_INVALID_POINTER); + AssertPtrReturn(pszFilename, VERR_INVALID_POINTER); + + void *pv = NULL; + size_t cb = 0; + int rc = RTFileReadAll(pszFilename, &pv, &cb); + if (RT_SUCCESS(rc)) + { + rc = RTFuzzCtxCreateFromStateMem(phFuzzCtx, pv, cb); + RTFileReadAllFree(pv, cb); + } + + return rc; +} + + +RTDECL(uint32_t) RTFuzzCtxRetain(RTFUZZCTX hFuzzCtx) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + + AssertPtrReturn(pThis, UINT32_MAX); + + uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs); + AssertMsg(cRefs > 1 && cRefs < _1M, ("%#x %p\n", cRefs, pThis)); + return cRefs; +} + + +RTDECL(uint32_t) RTFuzzCtxRelease(RTFUZZCTX hFuzzCtx) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + if (pThis == NIL_RTFUZZCTX) + return 0; + AssertPtrReturn(pThis, UINT32_MAX); + + uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs); + AssertMsg(cRefs < _1M, ("%#x %p\n", cRefs, pThis)); + if (cRefs == 0) + rtFuzzCtxDestroy(pThis); + return cRefs; +} + + +RTDECL(int) RTFuzzCtxQueryStats(RTFUZZCTX hFuzzCtx, PRTFUZZCTXSTATS pStats) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + AssertPtrReturn(pStats, VERR_INVALID_POINTER); + + pStats->cbMemory = ASMAtomicReadZ(&pThis->cbMemTotal); + pStats->cMutations = ASMAtomicReadU64(&pThis->cMutations); + return VINF_SUCCESS; +} + + +/** + * Fuzzing context export callback for a single mutation. + */ +static DECLCALLBACK(int) rtFuzzCtxStateExportMutations(PAVLU64NODECORE pCore, void *pvParam) +{ + PRTFUZZMUTATION pMutation = (PRTFUZZMUTATION)pCore; + PCRTFUZZMUTATOR pMutator = pMutation->pMutator; + PCRTFUZZEXPORTARGS pArgs = (PCRTFUZZEXPORTARGS)pvParam; + RTFUZZMUTATIONSTATE MutationState; + + MutationState.u64Id = RT_H2LE_U64(pMutation->Core.Key); + if (pMutation->pMutationParent) + MutationState.u64IdParent = RT_H2LE_U64(pMutation->pMutationParent->Core.Key); + else + MutationState.u64IdParent = RT_H2LE_U64(0); + MutationState.u64OffMutation = RT_H2LE_U64(pMutation->offMutation); + MutationState.cbInput = RT_H2LE_U64((uint64_t)pMutation->cbInput); + MutationState.cbMutation = RT_H2LE_U64((uint64_t)pMutation->cbMutation); + MutationState.u32IdMutator = RT_H2LE_U32(pMutator->uMutator); + MutationState.iLvl = RT_H2LE_U32(pMutation->iLvl); + MutationState.u32Magic = RT_H2LE_U32(pMutation->u32Magic); + + int rc = pArgs->pfnExport(pMutation->pFuzzer, &MutationState, sizeof(MutationState), pArgs->pvUser); + if ( RT_SUCCESS(rc) + && pMutator->pfnExport) + rc = pMutator->pfnExport(pMutation->pFuzzer, pMutation, &pMutation->abMutation[0], pArgs->pfnExport, pArgs->pvUser); + return rc; +} + + +RTDECL(int) RTFuzzCtxStateExport(RTFUZZCTX hFuzzCtx, PFNRTFUZZCTXEXPORT pfnExport, void *pvUser) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_POINTER); + AssertPtrReturn(pfnExport, VERR_INVALID_POINTER); + + char aszPrngExport[_4K]; /* Should be plenty of room here. */ + size_t cbPrng = sizeof(aszPrngExport); + int rc = RTRandAdvSaveState(pThis->hRand, &aszPrngExport[0], &cbPrng); + if (RT_SUCCESS(rc)) + { + RTFUZZCTXSTATE StateExport; + + StateExport.u32Magic = RT_H2LE_U32(RTFUZZCTX_MAGIC); + switch (pThis->enmType) + { + case RTFUZZCTXTYPE_BLOB: + StateExport.uCtxType = RT_H2LE_U32(RTFUZZCTX_STATE_TYPE_BLOB); + break; + case RTFUZZCTXTYPE_STREAM: + StateExport.uCtxType = RT_H2LE_U32(RTFUZZCTX_STATE_TYPE_STREAM); + break; + default: + AssertFailed(); + break; + } + StateExport.cbPrng = RT_H2LE_U32((uint32_t)cbPrng); + StateExport.cMutations = RT_H2LE_U32(pThis->cMutations); + StateExport.cMutators = RT_H2LE_U32(pThis->cMutators); + StateExport.fFlagsBehavioral = RT_H2LE_U32(pThis->fFlagsBehavioral); + StateExport.cbInputMax = RT_H2LE_U64(pThis->cbInputMax); + + /* Write the context state and PRNG state first. */ + rc = pfnExport(pThis, &StateExport, sizeof(StateExport), pvUser); + if (RT_SUCCESS(rc)) + rc = pfnExport(pThis, &aszPrngExport[0], cbPrng, pvUser); + if (RT_SUCCESS(rc)) + { + /* Write the mutator descriptors next. */ + for (uint32_t i = 0; i < pThis->cMutators && RT_SUCCESS(rc); i++) + { + PRTFUZZMUTATOR pMutator = &pThis->paMutators[i]; + uint32_t cchId = (uint32_t)strlen(pMutator->pszId) + 1; + uint32_t cchIdW = RT_H2LE_U32(cchId); + + rc = pfnExport(pThis, &cchIdW, sizeof(cchIdW), pvUser); + if (RT_SUCCESS(rc)) + rc = pfnExport(pThis, &pMutator->pszId[0], cchId, pvUser); + } + } + + /* Write the mutations last. */ + if (RT_SUCCESS(rc)) + { + RTFUZZEXPORTARGS Args; + + Args.pfnExport = pfnExport; + Args.pvUser = pvUser; + rc = RTAvlU64DoWithAll(&pThis->TreeMutations, true /*fFromLeft*/, rtFuzzCtxStateExportMutations, &Args); + } + } + + return rc; +} + + +RTDECL(int) RTFuzzCtxStateExportToMem(RTFUZZCTX hFuzzCtx, void **ppvState, size_t *pcbState) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_POINTER); + AssertPtrReturn(ppvState, VERR_INVALID_POINTER); + AssertPtrReturn(pcbState, VERR_INVALID_POINTER); + + return VERR_NOT_IMPLEMENTED; +} + + +/** + * Export to file callback. + */ +static DECLCALLBACK(int) rtFuzzCtxStateExportFile(RTFUZZCTX hFuzzCtx, const void *pvBuf, size_t cbWrite, void *pvUser) +{ + RT_NOREF(hFuzzCtx); + + RTFILE hFile = (RTFILE)pvUser; + return RTFileWrite(hFile, pvBuf, cbWrite, NULL); +} + + +RTDECL(int) RTFuzzCtxStateExportToFile(RTFUZZCTX hFuzzCtx, const char *pszFilename) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_POINTER); + AssertPtrReturn(pszFilename, VERR_INVALID_POINTER); + + RTFILE hFile; + int rc = RTFileOpen(&hFile, pszFilename, RTFILE_O_CREATE | RTFILE_O_WRITE | RTFILE_O_DENY_NONE); + if (RT_SUCCESS(rc)) + { + rc = RTFuzzCtxStateExport(hFuzzCtx, rtFuzzCtxStateExportFile, hFile); + RTFileClose(hFile); + if (RT_FAILURE(rc)) + RTFileDelete(pszFilename); + } + + return rc; +} + + +RTDECL(int) RTFuzzCtxCorpusInputAdd(RTFUZZCTX hFuzzCtx, const void *pvInput, size_t cbInput) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_POINTER); + AssertPtrReturn(pvInput, VERR_INVALID_POINTER); + AssertReturn(cbInput, VERR_INVALID_POINTER); + + int rc = VINF_SUCCESS; + void *pvCorpus = NULL; + PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, 0, NULL, cbInput, &pvCorpus); + if (RT_LIKELY(pMutation)) + { + pMutation->pMutator = &g_MutatorCorpus; + pMutation->cbInput = cbInput; + pMutation->pvInput = pvCorpus; + memcpy(pvCorpus, pvInput, cbInput); + rc = rtFuzzCtxMutationAdd(pThis, pMutation); + if (RT_FAILURE(rc)) + rtFuzzMutationDestroy(pMutation); + } + else + rc = VERR_NO_MEMORY; + + return rc; +} + + +RTDECL(int) RTFuzzCtxCorpusInputAddFromFile(RTFUZZCTX hFuzzCtx, const char *pszFilename) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_POINTER); + AssertPtrReturn(pszFilename, VERR_INVALID_POINTER); + + void *pv = NULL; + size_t cb = 0; + int rc = RTFileReadAll(pszFilename, &pv, &cb); + if (RT_SUCCESS(rc)) + { + rc = RTFuzzCtxCorpusInputAdd(hFuzzCtx, pv, cb); + RTFileReadAllFree(pv, cb); + } + + return rc; +} + + +RTDECL(int) RTFuzzCtxCorpusInputAddFromVfsFile(RTFUZZCTX hFuzzCtx, RTVFSFILE hVfsFile) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + AssertReturn(hVfsFile != NIL_RTVFSFILE, VERR_INVALID_HANDLE); + + uint64_t cbFile = 0; + void *pvCorpus = NULL; + int rc = RTVfsFileQuerySize(hVfsFile, &cbFile); + if (RT_SUCCESS(rc)) + { + PRTFUZZMUTATION pMutation = rtFuzzMutationCreate(pThis, 0, NULL, cbFile, &pvCorpus); + if (RT_LIKELY(pMutation)) + { + pMutation->pMutator = &g_MutatorCorpus; + pMutation->cbInput = cbFile; + pMutation->pvInput = pvCorpus; + rc = RTVfsFileRead(hVfsFile, pvCorpus, cbFile, NULL); + if (RT_SUCCESS(rc)) + rc = rtFuzzCtxMutationAdd(pThis, pMutation); + + if (RT_FAILURE(rc)) + rtFuzzMutationDestroy(pMutation); + } + } + + return rc; +} + + +RTDECL(int) RTFuzzCtxCorpusInputAddFromDirPath(RTFUZZCTX hFuzzCtx, const char *pszDirPath) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_POINTER); + AssertPtrReturn(pszDirPath, VERR_INVALID_POINTER); + + RTDIR hDir; + int rc = RTDirOpen(&hDir, pszDirPath); + if (RT_SUCCESS(rc)) + { + for (;;) + { + RTDIRENTRY DirEntry; + rc = RTDirRead(hDir, &DirEntry, NULL); + if (RT_FAILURE(rc)) + break; + + /* Skip '.', '..' and other non-files. */ + if ( DirEntry.enmType != RTDIRENTRYTYPE_UNKNOWN + && DirEntry.enmType != RTDIRENTRYTYPE_FILE) + continue; + if (RTDirEntryIsStdDotLink(&DirEntry)) + continue; + + /* Compose the full path, result 'unknown' entries and skip non-files. */ + char szFile[RTPATH_MAX]; + RT_ZERO(szFile); + rc = RTPathJoin(szFile, sizeof(szFile), pszDirPath, DirEntry.szName); + if (RT_FAILURE(rc)) + break; + + if (DirEntry.enmType == RTDIRENTRYTYPE_UNKNOWN) + { + RTDirQueryUnknownType(szFile, false, &DirEntry.enmType); + if (DirEntry.enmType != RTDIRENTRYTYPE_FILE) + continue; + } + + /* Okay, it's a file we can add. */ + rc = RTFuzzCtxCorpusInputAddFromFile(hFuzzCtx, szFile); + if (RT_FAILURE(rc)) + break; + } + if (rc == VERR_NO_MORE_FILES) + rc = VINF_SUCCESS; + RTDirClose(hDir); + } + + return rc; +} + + +RTDECL(int) RTFuzzCtxCfgSetInputSeedMaximum(RTFUZZCTX hFuzzCtx, size_t cbMax) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_POINTER); + + pThis->cbInputMax = cbMax; + return VINF_SUCCESS; +} + + +RTDECL(size_t) RTFuzzCtxCfgGetInputSeedMaximum(RTFUZZCTX hFuzzCtx) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, 0); + + return pThis->cbInputMax; +} + + +RTDECL(int) RTFuzzCtxCfgSetBehavioralFlags(RTFUZZCTX hFuzzCtx, uint32_t fFlags) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + AssertReturn(!(fFlags & ~RTFUZZCTX_F_BEHAVIORAL_VALID), VERR_INVALID_PARAMETER); + + pThis->fFlagsBehavioral = fFlags; + return VINF_SUCCESS; +} + + +RTDECL(uint32_t) RTFuzzCfgGetBehavioralFlags(RTFUZZCTX hFuzzCtx) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, 0); + + return pThis->fFlagsBehavioral; +} + + +RTDECL(int) RTFuzzCtxCfgSetTmpDirectory(RTFUZZCTX hFuzzCtx, const char *pszPathTmp) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_POINTER); + AssertPtrReturn(pszPathTmp, VERR_INVALID_POINTER); + + return VERR_NOT_IMPLEMENTED; +} + + +RTDECL(const char *) RTFuzzCtxCfgGetTmpDirectory(RTFUZZCTX hFuzzCtx) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, NULL); + + return NULL; +} + + +RTDECL(int) RTFuzzCtxReseed(RTFUZZCTX hFuzzCtx, uint64_t uSeed) +{ + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_POINTER); + + RTRandAdvSeed(pThis->hRand, uSeed); + return VINF_SUCCESS; +} + + +RTDECL(int) RTFuzzCtxInputGenerate(RTFUZZCTX hFuzzCtx, PRTFUZZINPUT phFuzzInput) +{ + int rc = VINF_SUCCESS; + PRTFUZZCTXINT pThis = hFuzzCtx; + AssertPtrReturn(pThis, VERR_INVALID_POINTER); + AssertPtrReturn(phFuzzInput, VERR_INVALID_POINTER); + + uint32_t cTries = 0; + PRTFUZZMUTATION pMutationParent = rtFuzzCtxMutationPickRnd(pThis); + do + { + uint32_t idxMutator = RTRandAdvU32Ex(pThis->hRand, 0, pThis->cMutators - 1); + PCRTFUZZMUTATOR pMutator = &pThis->paMutators[idxMutator]; + PRTFUZZMUTATION pMutation = NULL; + + uint64_t offStart = 0; + if (!(pMutator->fFlags & RTFUZZMUTATOR_F_END_OF_BUF)) + offStart = RTRandAdvU64Ex(pThis->hRand, 0, pMutationParent->cbInput - 1); + else + offStart = pMutationParent->cbInput; + + rc = pMutator->pfnPrep(pThis, offStart, pMutationParent, &pMutation); + if ( RT_SUCCESS(rc) + && VALID_PTR(pMutation)) + { + pMutation->pMutator = pMutator; + + if (pThis->fFlagsBehavioral & RTFUZZCTX_F_BEHAVIORAL_ADD_INPUT_AUTOMATICALLY_TO_CORPUS) + rtFuzzCtxMutationAdd(pThis, pMutation); + + /* Create a new input. */ + PRTFUZZINPUTINT pInput = (PRTFUZZINPUTINT)rtFuzzCtxMemoryAlloc(pThis, sizeof(RTFUZZINPUTINT)); + if (RT_LIKELY(pInput)) + { + pInput->u32Magic = 0; /** @todo */ + pInput->cRefs = 1; + pInput->pFuzzer = pThis; + pInput->pMutationTop = pMutation; + RTFuzzCtxRetain(pThis); + + rtFuzzMutationRelease(pMutationParent); + *phFuzzInput = pInput; + return rc; + } + else + rc = VERR_NO_MEMORY; + } + } while (++cTries <= 50); + + rtFuzzMutationRelease(pMutationParent); + if (RT_SUCCESS(rc)) + rc = VERR_INVALID_STATE; + + return rc; +} + + +RTDECL(int) RTFuzzInputQueryBlobData(RTFUZZINPUT hFuzzInput, void **ppv, size_t *pcb) +{ + PRTFUZZINPUTINT pThis = hFuzzInput; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + AssertReturn(pThis->pFuzzer->enmType == RTFUZZCTXTYPE_BLOB, VERR_INVALID_STATE); + + int rc = VINF_SUCCESS; + if (!pThis->pMutationTop->pvInput) + rc = rtFuzzMutationDataFinalize(pThis->pMutationTop); + + if (RT_SUCCESS(rc)) + { + *ppv = pThis->pMutationTop->pvInput; + *pcb = pThis->pMutationTop->cbInput; + } + + return rc; +} + + +RTDECL(int) RTFuzzInputMutateStreamData(RTFUZZINPUT hFuzzInput, void *pvBuf, size_t cbBuf) +{ + PRTFUZZINPUTINT pThis = hFuzzInput; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + AssertReturn(pThis->pFuzzer->enmType == RTFUZZCTXTYPE_STREAM, VERR_INVALID_STATE); + + RT_NOREF(pvBuf, cbBuf); + return VERR_NOT_IMPLEMENTED; +} + + +RTDECL(uint32_t) RTFuzzInputRetain(RTFUZZINPUT hFuzzInput) +{ + PRTFUZZINPUTINT pThis = hFuzzInput; + + AssertPtrReturn(pThis, UINT32_MAX); + + uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs); + AssertMsg(cRefs > 1 && cRefs < _1M, ("%#x %p\n", cRefs, pThis)); + return cRefs; +} + + +RTDECL(uint32_t) RTFuzzInputRelease(RTFUZZINPUT hFuzzInput) +{ + PRTFUZZINPUTINT pThis = hFuzzInput; + if (pThis == NIL_RTFUZZINPUT) + return 0; + AssertPtrReturn(pThis, UINT32_MAX); + + uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs); + AssertMsg(cRefs < _1M, ("%#x %p\n", cRefs, pThis)); + if (cRefs == 0) + rtFuzzInputDestroy(pThis); + return cRefs; +} + + +RTDECL(int) RTFuzzInputQueryDigestString(RTFUZZINPUT hFuzzInput, char *pszDigest, size_t cchDigest) +{ + PRTFUZZINPUTINT pThis = hFuzzInput; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + AssertReturn(pThis->pFuzzer->enmType == RTFUZZCTXTYPE_BLOB, VERR_INVALID_STATE); + AssertPtrReturn(pszDigest, VERR_INVALID_POINTER); + AssertReturn(cchDigest >= RTMD5_STRING_LEN + 1, VERR_INVALID_PARAMETER); + + int rc = VINF_SUCCESS; + if (!pThis->pMutationTop->pvInput) + rc = rtFuzzMutationDataFinalize(pThis->pMutationTop); + + if (RT_SUCCESS(rc)) + { + uint8_t abHash[RTMD5_HASH_SIZE]; + RTMd5(pThis->pMutationTop->pvInput, pThis->pMutationTop->cbInput, &abHash[0]); + rc = RTMd5ToString(&abHash[0], pszDigest, cchDigest); + } + + return rc; +} + + +RTDECL(int) RTFuzzInputWriteToFile(RTFUZZINPUT hFuzzInput, const char *pszFilename) +{ + PRTFUZZINPUTINT pThis = hFuzzInput; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + AssertReturn(pThis->pFuzzer->enmType == RTFUZZCTXTYPE_BLOB, VERR_INVALID_STATE); + AssertPtrReturn(pszFilename, VERR_INVALID_POINTER); + + int rc = VINF_SUCCESS; + if (!pThis->pMutationTop->pvInput) + rc = rtFuzzMutationDataFinalize(pThis->pMutationTop); + + if (RT_SUCCESS(rc)) + { + RTFILE hFile; + rc = RTFileOpen(&hFile, pszFilename, RTFILE_O_CREATE | RTFILE_O_WRITE | RTFILE_O_DENY_NONE); + if (RT_SUCCESS(rc)) + { + rc = RTFileWrite(hFile, pThis->pMutationTop->pvInput, pThis->pMutationTop->cbInput, NULL); + AssertRC(rc); + RTFileClose(hFile); + + if (RT_FAILURE(rc)) + RTFileDelete(pszFilename); + } + } + + return rc; +} + + +RTDECL(int) RTFuzzInputAddToCtxCorpus(RTFUZZINPUT hFuzzInput) +{ + PRTFUZZINPUTINT pThis = hFuzzInput; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + + return rtFuzzCtxMutationAdd(pThis->pFuzzer, pThis->pMutationTop); +} + + +RTDECL(int) RTFuzzInputRemoveFromCtxCorpus(RTFUZZINPUT hFuzzInput) +{ + PRTFUZZINPUTINT pThis = hFuzzInput; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + +#if 0 + int rc = VINF_SUCCESS; + PRTFUZZINTERMEDIATE pIntermediate = NULL; + PRTFUZZINPUTINT pInputLoc = rtFuzzCtxInputLocate(pThis->pFuzzer, &pThis->abMd5Hash[0], true /*fExact*/, + &pIntermediate); + if (pInputLoc) + { + AssertPtr(pIntermediate); + Assert(pInputLoc == pThis); + + uint64_t u64Md5Low = *(uint64_t *)&pThis->abMd5Hash[0]; + RTAvlU64Remove(&pIntermediate->TreeSeedsLow, u64Md5Low); + RTFuzzInputRelease(hFuzzInput); + } + else + rc = VERR_NOT_FOUND; +#endif + + return VERR_NOT_IMPLEMENTED; +} + |