【Android SDK程序逆向分析与破解系列】之三：Android可执行程序DEX分析（二）

作者：郭嘉
邮箱：[e-mail]
博客：http://blog.csdn.net/allenwells
github：https://github.com/AllenWells

【Android SDK程序逆向分析与破解系列】章节索引

【Android SDK程序逆向分析与破解系列】之一：Android安装程序APK分析
【Android SDK程序逆向分析与破解系列】之二：Android可执行程序DEX分析（一）
【Android SDK程序逆向分析与破解系列】之三：Android可执行程序DEX分析（二）
【Android SDK程序逆向分析与破解系列】之四：Android可执行程序ODEX分析
【Android SDK程序逆向分析与破解系列】之五：Android APK的静态分析

一 DEX文件结构体分析

Dalvik虚拟机解析DEX文件的内容，最终将其映射成DexMapList数据结构，DexHeader结构中的mapOff字段指明了DexMapList结构在DEX文件中的偏移。

源码位置：dalvik\libdex\DexFile.h

#ifndef LIBDEX_DEXFILE_H_#define LIBDEX_DEXFILE_H_#include "vm/Common.h"      // basic type defs, e.g. u1/u2/u4/u8, and LOG#include "libdex/SysUtil.h"/* * gcc-style inline management -- ensures we have a copy of all functions * in the library, so code that links against us will work whether or not * it was built with optimizations enabled. */#ifndef _DEX_GEN_INLINES             /* only defined by DexInlines.c */# define DEX_INLINE extern __inline__#else# define DEX_INLINE#endif/* DEX file magic number */#define DEX_MAGIC       "dex\n"/* current version, encoded in 4 bytes of ASCII */#define DEX_MAGIC_VERS  "036\0"/* * older but still-recognized version (corresponding to Android API * levels 13 and earlier */#define DEX_MAGIC_VERS_API_13  "035\0"/* same, but for optimized DEX header */#define DEX_OPT_MAGIC   "dey\n"#define DEX_OPT_MAGIC_VERS  "036\0"#define DEX_DEP_MAGIC   "deps"/* * 160-bit SHA-1 digest. */enum { kSHA1DigestLen = 20,       kSHA1DigestOutputLen = kSHA1DigestLen*2 +1 };/* general constants */enum {    kDexEndianConstant = 0x12345678,    /* the endianness indicator */    kDexNoIndex = 0xffffffff,           /* not a valid index value */};/* * Enumeration of all the primitive types. */enum PrimitiveType {    PRIM_NOT        = 0,       /* value is a reference type, not a primitive type */    PRIM_VOID       = 1,    PRIM_BOOLEAN    = 2,    PRIM_BYTE       = 3,    PRIM_SHORT      = 4,    PRIM_CHAR       = 5,    PRIM_INT        = 6,    PRIM_LONG       = 7,    PRIM_FLOAT      = 8,    PRIM_DOUBLE     = 9,};/* * access flags and masks; the "standard" ones are all <= 0x4000 * * Note: There are related declarations in vm/oo/Object.h in the ClassFlags * enum. */enum {    ACC_PUBLIC       = 0x00000001,       // class, field, method, ic    ACC_PRIVATE      = 0x00000002,       // field, method, ic    ACC_PROTECTED    = 0x00000004,       // field, method, ic    ACC_STATIC       = 0x00000008,       // field, method, ic    ACC_FINAL        = 0x00000010,       // class, field, method, ic    ACC_SYNCHRONIZED = 0x00000020,       // method (only allowed on natives)    ACC_SUPER        = 0x00000020,       // class (not used in Dalvik)    ACC_VOLATILE     = 0x00000040,       // field    ACC_BRIDGE       = 0x00000040,       // method (1.5)    ACC_TRANSIENT    = 0x00000080,       // field    ACC_VARARGS      = 0x00000080,       // method (1.5)    ACC_NATIVE       = 0x00000100,       // method    ACC_INTERFACE    = 0x00000200,       // class, ic    ACC_ABSTRACT     = 0x00000400,       // class, method, ic    ACC_STRICT       = 0x00000800,       // method    ACC_SYNTHETIC    = 0x00001000,       // field, method, ic    ACC_ANNOTATION   = 0x00002000,       // class, ic (1.5)    ACC_ENUM         = 0x00004000,       // class, field, ic (1.5)    ACC_CONSTRUCTOR  = 0x00010000,       // method (Dalvik only)    ACC_DECLARED_SYNCHRONIZED =                       0x00020000,       // method (Dalvik only)    ACC_CLASS_MASK =        (ACC_PUBLIC | ACC_FINAL | ACC_INTERFACE | ACC_ABSTRACT                | ACC_SYNTHETIC | ACC_ANNOTATION | ACC_ENUM),    ACC_INNER_CLASS_MASK =        (ACC_CLASS_MASK | ACC_PRIVATE | ACC_PROTECTED | ACC_STATIC),    ACC_FIELD_MASK =        (ACC_PUBLIC | ACC_PRIVATE | ACC_PROTECTED | ACC_STATIC | ACC_FINAL                | ACC_VOLATILE | ACC_TRANSIENT | ACC_SYNTHETIC | ACC_ENUM),    ACC_METHOD_MASK =        (ACC_PUBLIC | ACC_PRIVATE | ACC_PROTECTED | ACC_STATIC | ACC_FINAL                | ACC_SYNCHRONIZED | ACC_BRIDGE | ACC_VARARGS | ACC_NATIVE                | ACC_ABSTRACT | ACC_STRICT | ACC_SYNTHETIC | ACC_CONSTRUCTOR                | ACC_DECLARED_SYNCHRONIZED),};/* annotation constants */enum {    kDexVisibilityBuild         = 0x00,     /* annotation visibility */    kDexVisibilityRuntime       = 0x01,    kDexVisibilitySystem        = 0x02,    kDexAnnotationByte          = 0x00,    kDexAnnotationShort         = 0x02,    kDexAnnotationChar          = 0x03,    kDexAnnotationInt           = 0x04,    kDexAnnotationLong          = 0x06,    kDexAnnotationFloat         = 0x10,    kDexAnnotationDouble        = 0x11,    kDexAnnotationString        = 0x17,    kDexAnnotationType          = 0x18,    kDexAnnotationField         = 0x19,    kDexAnnotationMethod        = 0x1a,    kDexAnnotationEnum          = 0x1b,    kDexAnnotationArray         = 0x1c,    kDexAnnotationAnnotation    = 0x1d,    kDexAnnotationNull          = 0x1e,    kDexAnnotationBoolean       = 0x1f,    kDexAnnotationValueTypeMask = 0x1f,     /* low 5 bits */    kDexAnnotationValueArgShift = 5,};/* map item type codes */enum {    kDexTypeHeaderItem               = 0x0000,    kDexTypeStringIdItem             = 0x0001,    kDexTypeTypeIdItem               = 0x0002,    kDexTypeProtoIdItem              = 0x0003,    kDexTypeFieldIdItem              = 0x0004,    kDexTypeMethodIdItem             = 0x0005,    kDexTypeClassDefItem             = 0x0006,    kDexTypeMapList                  = 0x1000,    kDexTypeTypeList                 = 0x1001,    kDexTypeAnnotationSetRefList     = 0x1002,    kDexTypeAnnotationSetItem        = 0x1003,    kDexTypeClassDataItem            = 0x2000,    kDexTypeCodeItem                 = 0x2001,    kDexTypeStringDataItem           = 0x2002,    kDexTypeDebugInfoItem            = 0x2003,    kDexTypeAnnotationItem           = 0x2004,    kDexTypeEncodedArrayItem         = 0x2005,    kDexTypeAnnotationsDirectoryItem = 0x2006,};/* auxillary data section chunk codes */enum {    kDexChunkClassLookup            = 0x434c4b50,   /* CLKP */    kDexChunkRegisterMaps           = 0x524d4150,   /* RMAP */    kDexChunkEnd                    = 0x41454e44,   /* AEND */};/* debug info opcodes and constants */enum {    DBG_END_SEQUENCE         = 0x00,    DBG_ADVANCE_PC           = 0x01,    DBG_ADVANCE_LINE         = 0x02,    DBG_START_LOCAL          = 0x03,    DBG_START_LOCAL_EXTENDED = 0x04,    DBG_END_LOCAL            = 0x05,    DBG_RESTART_LOCAL        = 0x06,    DBG_SET_PROLOGUE_END     = 0x07,    DBG_SET_EPILOGUE_BEGIN   = 0x08,    DBG_SET_FILE             = 0x09,    DBG_FIRST_SPECIAL        = 0x0a,    DBG_LINE_BASE            = -4,    DBG_LINE_RANGE           = 15,};/* * Direct-mapped "header_item" struct. */struct DexHeader {    u1  magic[8];           /* DEX版本标识 */    u4  checksum;           /* adler32 检验 */    u1  signature[kSHA1DigestLen]; /* SHA-1哈希值 */    u4  fileSize;           /* 整个文件大小 */    u4  headerSize;         /* DexHeader结构大小 */    u4  endianTag;          /* 字节序标记 */    u4  linkSize;           /* 链接段大小 */    u4  linkOff;            /* 链接段偏移 */    u4  mapOff;             /* DexMapList的文件偏移，以下可根据名字以此类推 */    u4  stringIdsSize;    u4  stringIdsOff;    u4  typeIdsSize;    u4  typeIdsOff;    u4  protoIdsSize;    u4  protoIdsOff;    u4  fieldIdsSize;    u4  fieldIdsOff;    u4  methodIdsSize;    u4  methodIdsOff;    u4  classDefsSize;    u4  classDefsOff;    u4  dataSize;           /* 数据段大小 */    u4  dataOff;            /* 数据段偏移 */};/* * Direct-mapped "map_item". */struct DexMapItem {    u2 type;              /* kDexType开头的类型 */    u2 unused;            /* 未使用，用于字节对齐 */    u4 size;              /* 指定类型的个数 */    u4 offset;            /* 指定类型数据的文件偏移 */};/* * Direct-mapped "map_list". */struct DexMapList {    u4  size;               /* DexMapItem的个数 */    DexMapItem list[1];     /* DexMapItem的结构 */};/* * Direct-mapped "string_id_item". */struct DexStringId {    u4 stringDataOff;      /* 字符串数据偏移，指向字符串数据 */};/* * Direct-mapped "type_id_item". */struct DexTypeId {    u4  descriptorIdx;      /* 指向DexStringId列表的索引，代表了具体类的类型 */};/* * Direct-mapped "field_id_item". */struct DexFieldId {    u2  classIdx;           /*类的类型：指向DexTypeId列表的索引 */    u2  typeIdx;            /* 声明类型：指向DexProtoId列表的索引 */    u4  nameIdx;            /* 方法名：指向DexStringId列表的索引 */};/* * Direct-mapped "method_id_item". */struct DexMethodId {    u2  classIdx;           /* 类的类型：指向DexTypeId列表的索引 */    u2  protoIdx;           /* 声明类型：指向DexProtoId列表的索引 */    u4  nameIdx;            /* 方法名：指向DexStringId列表的索引 */};/* * Direct-mapped "proto_id_item". */struct DexProtoId {    u4  shortyIdx;          /* 指向DexStringId列表的索引，为方法声明字符串 */    u4  returnTypeIdx;      /* 指向DexTypeId列表的索引，方法返回类型字符串 */    u4  parametersOff;      /* 指向DexTypeList的偏移，存放了方法的参数列表 */};/* * Direct-mapped "class_def_item". */struct DexClassDef {    u4  classIdx;           /* 类的类型：指向DexTypeId列表的索引 */    u4  accessFlags;        /* 访问标志 */    u4  superclassIdx;      /* 父类类型：指向DexTypeID列表的索引 */    u4  interfacesOff;      /* 接口：指向DexTypeList的偏移 */    u4  sourceFileIdx;      /* 源文件名：指向DexStringId列表的索引 */    u4  annotationsOff;     /* 注解：指向DexAnnotationsDirectoryItem结构 */    u4  classDataOff;       /* 指向DexClassData结构的偏移 */    u4  staticValuesOff;    /* 指向DexEncodedArray结构的偏移 */};/* * Direct-mapped "type_item". */struct DexTypeItem {    u2  typeIdx;            /* 指向DexTypeId列表的索引 */};/* * Direct-mapped "type_list". */struct DexTypeList {    u4  size;               /* 接下来DexTypeItem的个数 */    DexTypeItem list[1];    /* DexTypeItem结构 */};/* * Direct-mapped "code_item". * * The "catches" table is used when throwing an exception, * "debugInfo" is used when displaying an exception stack trace or * debugging. An offset of zero indicates that there are no entries. */struct DexCode {    u2  registersSize;       /* 使用的寄存器个数 */    u2  insSize;             /* 参数个数 */    u2  outsSize;            /* 调用其他方式时使用的寄存器个数 */    u2  triesSize;           /* try/catch个数 */    u4  debugInfoOff;        /* 指向调试信息的偏移 */    u4  insnsSize;           /* 指令集的个数，以2字节为单位 */    u2  insns[1];            /* 指令集 */      /* 2字节空间用于结构对齐 */    /* try_item[triesSize]，DexTry结构 */    /* try/catch总handler的个数 */    /* catch_handler_item[handlersSize]，DexCatchHandler结构 */};/* * Direct-mapped "try_item". */struct DexTry {    u4  startAddr;          /* start address, in 16-bit code units */    u2  insnCount;          /* instruction count, in 16-bit code units */    u2  handlerOff;         /* offset in encoded handler data to handlers */};/* * Link table.  Currently undefined. */struct DexLink {    u1  bleargh;};/* * Direct-mapped "annotations_directory_item". */struct DexAnnotationsDirectoryItem {    u4  classAnnotationsOff;  /* offset to DexAnnotationSetItem */    u4  fieldsSize;           /* count of DexFieldAnnotationsItem */    u4  methodsSize;          /* count of DexMethodAnnotationsItem */    u4  parametersSize;       /* count of DexParameterAnnotationsItem */    /* followed by DexFieldAnnotationsItem[fieldsSize] */    /* followed by DexMethodAnnotationsItem[methodsSize] */    /* followed by DexParameterAnnotationsItem[parametersSize] */};/* * Direct-mapped "field_annotations_item". */struct DexFieldAnnotationsItem {    u4  fieldIdx;    u4  annotationsOff;             /* offset to DexAnnotationSetItem */};/* * Direct-mapped "method_annotations_item". */struct DexMethodAnnotationsItem {    u4  methodIdx;    u4  annotationsOff;             /* offset to DexAnnotationSetItem */};/* * Direct-mapped "parameter_annotations_item". */struct DexParameterAnnotationsItem {    u4  methodIdx;    u4  annotationsOff;             /* offset to DexAnotationSetRefList */};/* * Direct-mapped "annotation_set_ref_item". */struct DexAnnotationSetRefItem {    u4  annotationsOff;             /* offset to DexAnnotationSetItem */};/* * Direct-mapped "annotation_set_ref_list". */struct DexAnnotationSetRefList {    u4  size;    DexAnnotationSetRefItem list[1];};/* * Direct-mapped "annotation_set_item". */struct DexAnnotationSetItem {    u4  size;    u4  entries[1];                 /* offset to DexAnnotationItem */};/* * Direct-mapped "annotation_item". * * NOTE: this structure is byte-aligned. */struct DexAnnotationItem {    u1  visibility;    u1  annotation[1];              /* data in encoded_annotation format */};/* * Direct-mapped "encoded_array". * * NOTE: this structure is byte-aligned. */struct DexEncodedArray {    u1  array[1];                   /* data in encoded_array format */};/* * Lookup table for classes.  It provides a mapping from class name to * class definition.  Used by dexFindClass(). * * We calculate this at DEX optimization time and embed it in the file so we * don't need the same hash table in every VM.  This is slightly slower than * a hash table with direct pointers to the items, but because it's shared * there's less of a penalty for using a fairly sparse table. */struct DexClassLookup {    int     size;                       // total size, including "size"    int     numEntries;                 // size of table[]; always power of 2    struct {        u4      classDescriptorHash;    // class descriptor hash code        int     classDescriptorOffset;  // in bytes, from start of DEX        int     classDefOffset;         // in bytes, from start of DEX    } table[1];};/* * Header added by DEX optimization pass.  Values are always written in * local byte and structure padding.  The first field (magic + version) * is guaranteed to be present and directly readable for all expected * compiler configurations; the rest is version-dependent. * * Try to keep this simple and fixed-size. */struct DexOptHeader {    u1  magic[8];           /* includes version number */    u4  dexOffset;          /* file offset of DEX header */    u4  dexLength;    u4  depsOffset;         /* offset of optimized DEX dependency table */    u4  depsLength;    u4  optOffset;          /* file offset of optimized data tables */    u4  optLength;    u4  flags;              /* some info flags */    u4  checksum;           /* adler32 checksum covering deps/opt */    /* pad for 64-bit alignment if necessary */};#define DEX_OPT_FLAG_BIG            (1<<1)  /* swapped to big-endian */#define DEX_INTERFACE_CACHE_SIZE    128     /* must be power of 2 *//* * Structure representing a DEX file. * * Code should regard DexFile as opaque, using the API calls provided here * to access specific structures. */struct DexFile {    /* directly-mapped "opt" header */    const DexOptHeader* pOptHeader;    /* pointers to directly-mapped structs and arrays in base DEX */    const DexHeader*    pHeader;    const DexStringId*  pStringIds;    const DexTypeId*    pTypeIds;    const DexFieldId*   pFieldIds;    const DexMethodId*  pMethodIds;    const DexProtoId*   pProtoIds;    const DexClassDef*  pClassDefs;    const DexLink*      pLinkData;    /*     * These are mapped out of the "auxillary" section, and may not be     * included in the file.     */    const DexClassLookup* pClassLookup;    const void*         pRegisterMapPool;       // RegisterMapClassPool    /* points to start of DEX file data */    const u1*           baseAddr;    /* track memory overhead for auxillary structures */    int                 overhead;    /* additional app-specific data structures associated with the DEX */    //void*               auxData;};/* * Utility function -- rounds up to the nearest power of 2. */u4 dexRoundUpPower2(u4 val);/* * Parse an optimized or unoptimized .dex file sitting in memory. * * On success, return a newly-allocated DexFile. */DexFile* dexFileParse(const u1* data, size_t length, int flags);/* bit values for "flags" argument to dexFileParse */enum {    kDexParseDefault            = 0,    kDexParseVerifyChecksum     = 1,    kDexParseContinueOnError    = (1 << 1),};/* * Fix the byte ordering of all fields in the DEX file, and do * structural verification. This is only required for code that opens * "raw" DEX files, such as the DEX optimizer. * * Return 0 on success. */int dexSwapAndVerify(u1* addr, int len);/* * Detect the file type of the given memory buffer via magic number. * Call dexSwapAndVerify() on an unoptimized DEX file, do nothing * but return successfully on an optimized DEX file, and report an * error for all other cases. * * Return 0 on success. */int dexSwapAndVerifyIfNecessary(u1* addr, int len);/* * Check to see if the file magic and format version in the given * header are recognized as valid. Returns true if they are * acceptable. */bool dexHasValidMagic(const DexHeader* pHeader);/* * Compute DEX checksum. */u4 dexComputeChecksum(const DexHeader* pHeader);/* * Free a DexFile structure, along with any associated structures. */void dexFileFree(DexFile* pDexFile);/* * Create class lookup table. */DexClassLookup* dexCreateClassLookup(DexFile* pDexFile);/* * Find a class definition by descriptor. */const DexClassDef* dexFindClass(const DexFile* pFile, const char* descriptor);/* * Set up the basic raw data pointers of a DexFile. This function isn't * meant for general use. */void dexFileSetupBasicPointers(DexFile* pDexFile, const u1* data);/* return the DexMapList of the file, if any */DEX_INLINE const DexMapList* dexGetMap(const DexFile* pDexFile) {    u4 mapOff = pDexFile->pHeader->mapOff;    if (mapOff == 0) {        return NULL;    } else {        return (const DexMapList*) (pDexFile->baseAddr + mapOff);    }}/* return the const char* string data referred to by the given string_id */DEX_INLINE const char* dexGetStringData(const DexFile* pDexFile,        const DexStringId* pStringId) {    const u1* ptr = pDexFile->baseAddr + pStringId->stringDataOff;    // Skip the uleb128 length.    while (*(ptr++) > 0x7f) /* empty */ ;    return (const char*) ptr;}/* return the StringId with the specified index */DEX_INLINE const DexStringId* dexGetStringId(const DexFile* pDexFile, u4 idx) {    assert(idx < pDexFile->pHeader->stringIdsSize);    return &pDexFile->pStringIds[idx];}/* return the UTF-8 encoded string with the specified string_id index */DEX_INLINE const char* dexStringById(const DexFile* pDexFile, u4 idx) {    const DexStringId* pStringId = dexGetStringId(pDexFile, idx);    return dexGetStringData(pDexFile, pStringId);}/* Return the UTF-8 encoded string with the specified string_id index, * also filling in the UTF-16 size (number of 16-bit code points).*/const char* dexStringAndSizeById(const DexFile* pDexFile, u4 idx,        u4* utf16Size);/* return the TypeId with the specified index */DEX_INLINE const DexTypeId* dexGetTypeId(const DexFile* pDexFile, u4 idx) {    assert(idx < pDexFile->pHeader->typeIdsSize);    return &pDexFile->pTypeIds[idx];}/* * Get the descriptor string associated with a given type index. * The caller should not free() the returned string. */DEX_INLINE const char* dexStringByTypeIdx(const DexFile* pDexFile, u4 idx) {    const DexTypeId* typeId = dexGetTypeId(pDexFile, idx);    return dexStringById(pDexFile, typeId->descriptorIdx);}/* return the MethodId with the specified index */DEX_INLINE const DexMethodId* dexGetMethodId(const DexFile* pDexFile, u4 idx) {    assert(idx < pDexFile->pHeader->methodIdsSize);    return &pDexFile->pMethodIds[idx];}/* return the FieldId with the specified index */DEX_INLINE const DexFieldId* dexGetFieldId(const DexFile* pDexFile, u4 idx) {    assert(idx < pDexFile->pHeader->fieldIdsSize);    return &pDexFile->pFieldIds[idx];}/* return the ProtoId with the specified index */DEX_INLINE const DexProtoId* dexGetProtoId(const DexFile* pDexFile, u4 idx) {    assert(idx < pDexFile->pHeader->protoIdsSize);    return &pDexFile->pProtoIds[idx];}/* * Get the parameter list from a ProtoId. The returns NULL if the ProtoId * does not have a parameter list. */DEX_INLINE const DexTypeList* dexGetProtoParameters(    const DexFile *pDexFile, const DexProtoId* pProtoId) {    if (pProtoId->parametersOff == 0) {        return NULL;    }    return (const DexTypeList*)        (pDexFile->baseAddr + pProtoId->parametersOff);}/* return the ClassDef with the specified index */DEX_INLINE const DexClassDef* dexGetClassDef(const DexFile* pDexFile, u4 idx) {    assert(idx < pDexFile->pHeader->classDefsSize);    return &pDexFile->pClassDefs[idx];}/* given a ClassDef pointer, recover its index */DEX_INLINE u4 dexGetIndexForClassDef(const DexFile* pDexFile,    const DexClassDef* pClassDef){    assert(pClassDef >= pDexFile->pClassDefs &&           pClassDef < pDexFile->pClassDefs + pDexFile->pHeader->classDefsSize);    return pClassDef - pDexFile->pClassDefs;}/* get the interface list for a DexClass */DEX_INLINE const DexTypeList* dexGetInterfacesList(const DexFile* pDexFile,    const DexClassDef* pClassDef){    if (pClassDef->interfacesOff == 0)        return NULL;    return (const DexTypeList*)        (pDexFile->baseAddr + pClassDef->interfacesOff);}/* return the Nth entry in a DexTypeList. */DEX_INLINE const DexTypeItem* dexGetTypeItem(const DexTypeList* pList,    u4 idx){    assert(idx < pList->size);    return &pList->list[idx];}/* return the type_idx for the Nth entry in a TypeList */DEX_INLINE u4 dexTypeListGetIdx(const DexTypeList* pList, u4 idx) {    const DexTypeItem* pItem = dexGetTypeItem(pList, idx);    return pItem->typeIdx;}/* get the static values list for a DexClass */DEX_INLINE const DexEncodedArray* dexGetStaticValuesList(    const DexFile* pDexFile, const DexClassDef* pClassDef){    if (pClassDef->staticValuesOff == 0)        return NULL;    return (const DexEncodedArray*)        (pDexFile->baseAddr + pClassDef->staticValuesOff);}/* get the annotations directory item for a DexClass */DEX_INLINE const DexAnnotationsDirectoryItem* dexGetAnnotationsDirectoryItem(    const DexFile* pDexFile, const DexClassDef* pClassDef){    if (pClassDef->annotationsOff == 0)        return NULL;    return (const DexAnnotationsDirectoryItem*)        (pDexFile->baseAddr + pClassDef->annotationsOff);}/* get the source file string */DEX_INLINE const char* dexGetSourceFile(    const DexFile* pDexFile, const DexClassDef* pClassDef){    if (pClassDef->sourceFileIdx == 0xffffffff)        return NULL;    return dexStringById(pDexFile, pClassDef->sourceFileIdx);}/* get the size, in bytes, of a DexCode */size_t dexGetDexCodeSize(const DexCode* pCode);/* Get the list of "tries" for the given DexCode. */DEX_INLINE const DexTry* dexGetTries(const DexCode* pCode) {    const u2* insnsEnd = &pCode->insns[pCode->insnsSize];    // Round to four bytes.    if ((((uintptr_t) insnsEnd) & 3) != 0) {        insnsEnd++;    }    return (const DexTry*) insnsEnd;}/* Get the base of the encoded data for the given DexCode. */DEX_INLINE const u1* dexGetCatchHandlerData(const DexCode* pCode) {    const DexTry* pTries = dexGetTries(pCode);    return (const u1*) &pTries[pCode->triesSize];}/* get a pointer to the start of the debugging data */DEX_INLINE const u1* dexGetDebugInfoStream(const DexFile* pDexFile,    const DexCode* pCode){    if (pCode->debugInfoOff == 0) {        return NULL;    } else {        return pDexFile->baseAddr + pCode->debugInfoOff;    }}/* DexClassDef convenience - get class descriptor */DEX_INLINE const char* dexGetClassDescriptor(const DexFile* pDexFile,    const DexClassDef* pClassDef){    return dexStringByTypeIdx(pDexFile, pClassDef->classIdx);}/* DexClassDef convenience - get superclass descriptor */DEX_INLINE const char* dexGetSuperClassDescriptor(const DexFile* pDexFile,    const DexClassDef* pClassDef){    if (pClassDef->superclassIdx == 0)        return NULL;    return dexStringByTypeIdx(pDexFile, pClassDef->superclassIdx);}/* DexClassDef convenience - get class_data_item pointer */DEX_INLINE const u1* dexGetClassData(const DexFile* pDexFile,    const DexClassDef* pClassDef){    if (pClassDef->classDataOff == 0)        return NULL;    return (const u1*) (pDexFile->baseAddr + pClassDef->classDataOff);}/* Get an annotation set at a particular offset. */DEX_INLINE const DexAnnotationSetItem* dexGetAnnotationSetItem(    const DexFile* pDexFile, u4 offset){    if (offset == 0) {        return NULL;    }    return (const DexAnnotationSetItem*) (pDexFile->baseAddr + offset);}/* get the class' annotation set */DEX_INLINE const DexAnnotationSetItem* dexGetClassAnnotationSet(    const DexFile* pDexFile, const DexAnnotationsDirectoryItem* pAnnoDir){    return dexGetAnnotationSetItem(pDexFile, pAnnoDir->classAnnotationsOff);}/* get the class' field annotation list */DEX_INLINE const DexFieldAnnotationsItem* dexGetFieldAnnotations(    const DexFile* pDexFile, const DexAnnotationsDirectoryItem* pAnnoDir){    (void) pDexFile;    if (pAnnoDir->fieldsSize == 0)        return NULL;    // Skip past the header to the start of the field annotations.    return (const DexFieldAnnotationsItem*) &pAnnoDir[1];}/* get field annotation list size */DEX_INLINE int dexGetFieldAnnotationsSize(const DexFile* pDexFile,    const DexAnnotationsDirectoryItem* pAnnoDir){    (void) pDexFile;    return pAnnoDir->fieldsSize;}/* return a pointer to the field's annotation set */DEX_INLINE const DexAnnotationSetItem* dexGetFieldAnnotationSetItem(    const DexFile* pDexFile, const DexFieldAnnotationsItem* pItem){    return dexGetAnnotationSetItem(pDexFile, pItem->annotationsOff);}/* get the class' method annotation list */DEX_INLINE const DexMethodAnnotationsItem* dexGetMethodAnnotations(    const DexFile* pDexFile, const DexAnnotationsDirectoryItem* pAnnoDir){    (void) pDexFile;    if (pAnnoDir->methodsSize == 0)        return NULL;    /*     * Skip past the header and field annotations to the start of the     * method annotations.     */    const u1* addr = (const u1*) &pAnnoDir[1];    addr += pAnnoDir->fieldsSize * sizeof (DexFieldAnnotationsItem);    return (const DexMethodAnnotationsItem*) addr;}/* get method annotation list size */DEX_INLINE int dexGetMethodAnnotationsSize(const DexFile* pDexFile,    const DexAnnotationsDirectoryItem* pAnnoDir){    (void) pDexFile;    return pAnnoDir->methodsSize;}/* return a pointer to the method's annotation set */DEX_INLINE const DexAnnotationSetItem* dexGetMethodAnnotationSetItem(    const DexFile* pDexFile, const DexMethodAnnotationsItem* pItem){    return dexGetAnnotationSetItem(pDexFile, pItem->annotationsOff);}/* get the class' parameter annotation list */DEX_INLINE const DexParameterAnnotationsItem* dexGetParameterAnnotations(    const DexFile* pDexFile, const DexAnnotationsDirectoryItem* pAnnoDir){    (void) pDexFile;    if (pAnnoDir->parametersSize == 0)        return NULL;    /*     * Skip past the header, field annotations, and method annotations     * to the start of the parameter annotations.     */    const u1* addr = (const u1*) &pAnnoDir[1];    addr += pAnnoDir->fieldsSize * sizeof (DexFieldAnnotationsItem);    addr += pAnnoDir->methodsSize * sizeof (DexMethodAnnotationsItem);    return (const DexParameterAnnotationsItem*) addr;}/* get method annotation list size */DEX_INLINE int dexGetParameterAnnotationsSize(const DexFile* pDexFile,    const DexAnnotationsDirectoryItem* pAnnoDir){    (void) pDexFile;    return pAnnoDir->parametersSize;}/* return the parameter annotation ref list */DEX_INLINE const DexAnnotationSetRefList* dexGetParameterAnnotationSetRefList(    const DexFile* pDexFile, const DexParameterAnnotationsItem* pItem){    if (pItem->annotationsOff == 0) {        return NULL;    }    return (const DexAnnotationSetRefList*) (pDexFile->baseAddr + pItem->annotationsOff);}/* get method annotation list size */DEX_INLINE int dexGetParameterAnnotationSetRefSize(const DexFile* pDexFile,    const DexParameterAnnotationsItem* pItem){    if (pItem->annotationsOff == 0) {        return 0;    }    return dexGetParameterAnnotationSetRefList(pDexFile, pItem)->size;}/* return the Nth entry from an annotation set ref list */DEX_INLINE const DexAnnotationSetRefItem* dexGetParameterAnnotationSetRef(    const DexAnnotationSetRefList* pList, u4 idx){    assert(idx < pList->size);    return &pList->list[idx];}/* given a DexAnnotationSetRefItem, return the DexAnnotationSetItem */DEX_INLINE const DexAnnotationSetItem* dexGetSetRefItemItem(    const DexFile* pDexFile, const DexAnnotationSetRefItem* pItem){    return dexGetAnnotationSetItem(pDexFile, pItem->annotationsOff);}/* return the Nth annotation offset from a DexAnnotationSetItem */DEX_INLINE u4 dexGetAnnotationOff(    const DexAnnotationSetItem* pAnnoSet, u4 idx){    assert(idx < pAnnoSet->size);    return pAnnoSet->entries[idx];}/* return the Nth annotation item from a DexAnnotationSetItem */DEX_INLINE const DexAnnotationItem* dexGetAnnotationItem(    const DexFile* pDexFile, const DexAnnotationSetItem* pAnnoSet, u4 idx){    u4 offset = dexGetAnnotationOff(pAnnoSet, idx);    if (offset == 0) {        return NULL;    }    return (const DexAnnotationItem*) (pDexFile->baseAddr + offset);}/* * Get the type descriptor character associated with a given primitive * type. This returns '\0' if the type is invalid. */char dexGetPrimitiveTypeDescriptorChar(PrimitiveType type);/* * Get the type descriptor string associated with a given primitive * type. */const char* dexGetPrimitiveTypeDescriptor(PrimitiveType type);/* * Get the boxed type descriptor string associated with a given * primitive type. This returns NULL for an invalid type, including * particularly for type "void". In the latter case, even though there * is a class Void, there's no such thing as a boxed instance of it. */const char* dexGetBoxedTypeDescriptor(PrimitiveType type);/* * Get the primitive type constant from the given descriptor character. * This returns PRIM_NOT (note: this is a 0) if the character is invalid * as a primitive type descriptor. */PrimitiveType dexGetPrimitiveTypeFromDescriptorChar(char descriptorChar);#endif  // LIBDEX_DEXFILE_H_