ObjFW  Check-in [2fcf5a3052]

PROJECT_NAME = "ObjFW"
OUTPUT_DIRECTORY = docs/
INPUT = src src/exceptions src/runtime
FILE_PATTERNS = *.h *.m
HTML_OUTPUT = .
GENERATE_LATEX = NO
HIDE_UNDOC_CLASSES = YES
HIDE_UNDOC_MEMBERS = YES

PREDEFINED = __OBJC__				\
	     DOXYGEN				\
	     OF_BOXABLE				\
	     OF_CONSUMED			\
	     OF_DESIGNATED_INITIALIZER		\
	     OF_GENERIC(...)=			\
	     OF_HAVE_BLOCKS			\

@class OFString;

/**
 * @brief Options for joining the objects of an array.
 *
 * This is a bit mask.
 */
typedef enum OFArrayJoinOptions {
	/** Skip empty components */
	OFArraySkipEmptyComponents = 1
} OFArrayJoinOptions;






typedef enum OFArraySortOptions {

	OFArraySortDescending = 1
} OFArraySortOptions;

#ifdef OF_HAVE_BLOCKS
/**
 * @brief A block for enumerating an OFArray.
 *

@class OFUDPSocket;

/**
 * @enum OFDNSResolverErrorCode OFDNSResolver.h ObjFW/OFDNSResolver.h
 *
 * @brief An enum describing why resolving a host failed.
 */
typedef enum OFDNSResolverErrorCode {
	/** An unknown error */
	OFDNSResolverErrorCodeUnknown,
	/** The query timed out */
	OFDNSResolverErrorCodeTimeout,
	/** The query was canceled */
	OFDNSResolverErrorCodeCanceled,
	/**

@class OFArray OF_GENERIC(ObjectType);
@class OFData;

/**
 * @brief The DNS class.
 */
typedef enum OFDNSClass {
	/** IN */
	OFDNSClassIN  =   1,
	/** Any class. Only for queries. */
	OFDNSClassAny = 255,
} OFDNSClass;

/**
 * @brief The type of a DNS resource record.
 */
typedef enum OFDNSRecordType {
	/** A */
	OFDNSRecordTypeA     =   1,
	/** NS */
	OFDNSRecordTypeNS    =   2,
	/** CNAME */
	OFDNSRecordTypeCNAME =   5,
	/** SOA */

@class OFURL;

/**
 * @brief Options for searching in data.
 *
 * This is a bit mask.
 */
typedef enum OFDataSearchOptions {
	/** Search backwards in the data */
	OFDataSearchBackwards = 1
} OFDataSearchOptions;

/**
 * @class OFData OFData.h ObjFW/OFData.h
 *

#import "OFKernelEventObserver.h"

#ifndef OF_AMIGAOS
# define OF_FILE_HANDLE_IS_FD
typedef int OFFileHandle;
static const OFFileHandle OFInvalidFileHandle = -1;
#else
typedef struct OFFileHandle *OFFileHandle;
static const OFFileHandle OFInvalidFileHandle = NULL;
#endif

OF_ASSUME_NONNULL_BEGIN

@class OFURL;

#ifndef O_EXLOCK
# define O_EXLOCK 0
#endif

#ifndef OF_AMIGAOS
# define closeHandle(h) close(h)
#else
static struct OFFileHandle
	struct OFFileHandle *previous, *next;
	BPTR handle;
	bool append;
} *firstHandle = NULL;

static void
closeHandle(OFFileHandle handle)
{

@class OFInflateStream;

OF_ASSUME_NONNULL_BEGIN

/**
 * @brief The operating system on which compressed the data.
 */
typedef enum OFGZIPStreamOperatingSystem {
	OFGZIPStreamOperatingSystemFAT	       =   0,
	OFGZIPStreamOperatingSystemAmiga       =   1,
	OFGZIPStreamOperatingSystemVMS	       =   2,
	OFGZIPStreamOperatingSystemUNIX	       =   3,
	OFGZIPStreamOperatingSystemVM_CMS      =   4,
	OFGZIPStreamOperatingSystemAtariTOS    =   5,
	OFGZIPStreamOperatingSystemHPFS	       =   6,

@class OFString;

/** @file */

/**
 * @brief The type of an HTTP request.
 */
typedef enum OFHTTPRequestMethod {
	/** OPTIONS */
	OFHTTPRequestMethodOptions,
	/** GET */
	OFHTTPRequestMethodGet,
	/** HEAD */
	OFHTTPRequestMethodHead,
	/** POST */

} OFHTTPRequestMethod;

/**
 * @struct OFHTTPRequestProtocolVersion OFHTTPRequest.h ObjFW/OFHTTPRequest.h
 *
 * @brief The HTTP version of the HTTP request.
 */
struct OF_BOXABLE OFHTTPRequestProtocolVersion {
	/** The major of the HTTP version */
	unsigned char major;
	/** The minor of the HTTP version */
	unsigned char minor;
};
typedef struct OFHTTPRequestProtocolVersion OFHTTPRequestProtocolVersion;

/**
 * @class OFHTTPRequest OFHTTPRequest.h ObjFW/OFHTTPRequest.h
 *
 * @brief A class for storing HTTP requests.
 */
@interface OFHTTPRequest: OFObject <OFCopying>

#import "macros.h"

#import "OFInvalidFormatException.h"

OF_ASSUME_NONNULL_BEGIN

typedef struct OFHuffmanTree {
	struct OFHuffmanTree *_Nullable leaves[2];
	uint16_t value;
} OFHuffmanTree;

/* Inlined for performance. */
static OF_INLINE bool
OFHuffmanTreeWalk(id _Nullable stream,
    bool (*bitReader)(id _Nullable, uint16_t *_Nonnull, uint8_t),
    OFHuffmanTree *_Nonnull *_Nonnull tree, uint16_t *_Nonnull value)
{
	struct OFHuffmanTree *iter = *tree;
	uint16_t bits;

	while (iter->value == 0xFFFF) {
		if OF_UNLIKELY (!bitReader(stream, &bits, 1)) {
			*tree = iter;
			return false;
		}

	*value = iter->value;
	return true;
}

#ifdef __cplusplus
extern "C" {
#endif
extern OFHuffmanTree *_Nonnull OFHuffmanTreeNew(uint8_t lengths[_Nonnull],
    uint16_t count);
extern OFHuffmanTree *_Nonnull OFHuffmanTreeNewSingle(uint16_t value);
extern void OFHuffmanTreeFree(OFHuffmanTree *_Nonnull tree);
#ifdef __cplusplus
}
#endif

OF_ASSUME_NONNULL_END

#include <stdlib.h>

#import "OFHuffmanTree.h"

#import "OFInvalidFormatException.h"
#import "OFOutOfMemoryException.h"

static OFHuffmanTree *
newTree(void)
{
	OFHuffmanTree *tree;

	tree = OFAllocMemory(1, sizeof(*tree));
	tree->leaves[0] = tree->leaves[1] = NULL;
	tree->value = 0xFFFF;

	return tree;
}

static void
treeInsert(OFHuffmanTree *tree, uint16_t code, uint8_t length, uint16_t value)
{
	while (length > 0) {
		uint8_t bit;

		length--;
		bit = (code & (1u << length)) >> length;

		if (tree->leaves[bit] == NULL)
			tree->leaves[bit] = newTree();

		tree = tree->leaves[bit];
	}

	tree->value = value;
}

OFHuffmanTree *
OFHuffmanTreeNew(uint8_t lengths[], uint16_t count)
{
	OFHuffmanTree *tree;
	uint16_t *lengthCount = NULL;
	uint16_t code, maxCode = 0, *nextCode = NULL;
	uint_fast8_t maxBit = 0;

	@try {
		for (uint16_t i = 0; i < count; i++) {
			uint_fast8_t length = lengths[i];

		OFFreeMemory(lengthCount);
		OFFreeMemory(nextCode);
	}

	return tree;
}

OFHuffmanTree *
OFHuffmanTreeNewSingle(uint16_t value)
{
	OFHuffmanTree *tree = newTree();

	tree->value = value;

	return tree;
}

void
OFHuffmanTreeFree(OFHuffmanTree *tree)
{
	for (uint_fast8_t i = 0; i < 2; i++)
		if OF_LIKELY (tree->leaves[i] != NULL)
			OFHuffmanTreeFree(tree->leaves[i]);

	OFFreeMemory(tree);
}

			uint8_t position;
			uint8_t length[4];
		} uncompressedHeader;
		struct {
			uint16_t position, length;
		} uncompressed;
		struct {
			OFHuffmanTree *_Nullable litLenTree;
			OFHuffmanTree *_Nullable distTree;
			OFHuffmanTree *_Nullable codeLenTree;
			OFHuffmanTree *_Nullable treeIter;
			uint8_t *_Nullable lengths;
			uint16_t receivedCount;
			uint8_t value, litLenCodesCount, distCodesCount;
			uint8_t codeLenCodesCount;
		} huffmanTree;
		struct {
			OFHuffmanTree *_Nullable litLenTree;
			OFHuffmanTree *_Nullable distTree;
			OFHuffmanTree *_Nullable treeIter;
			int state;
			uint16_t value, length, distance, extraBits;
		} huffman;
	} _context;
	bool _inLastBlock, _atEndOfStream;
}

			uint8_t position;
			uint8_t length[4];
		} uncompressedHeader;
		struct {
			uint16_t position, length;
		} uncompressed;
		struct {
			OFHuffmanTree *_Nullable litLenTree;
			OFHuffmanTree *_Nullable distTree;
			OFHuffmanTree *_Nullable codeLenTree;
			OFHuffmanTree *_Nullable treeIter;
			uint8_t *_Nullable lengths;
			uint16_t receivedCount;
			uint8_t value, litLenCodesCount, distCodesCount;
			uint8_t codeLenCodesCount;
		} huffmanTree;
		struct {
			OFHuffmanTree *_Nullable litLenTree;
			OFHuffmanTree *_Nullable distTree;
			OFHuffmanTree *_Nullable treeIter;
			int state;
			uint16_t value, length, distance, extraBits;
		} huffman;
	} _context;
	bool _inLastBlock, _atEndOfStream;
}

	0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10,
	10, 11, 11, 12, 12, 13, 13, 14, 14
};
#endif
static const uint8_t codeLengthsOrder[19] = {
	16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
};
static OFHuffmanTree *fixedLitLenTree, *fixedDistTree;

@implementation OFInflateStream
static OF_INLINE bool
tryReadBits(OFInflateStream *stream, uint16_t *bits, uint8_t count)
{
	uint16_t ret = stream->_savedBits;

@class OFString;

OF_ASSUME_NONNULL_BEGIN

/**
 * @brief Options to change the behavior when creating a JSON representation.
 */
typedef enum OFJSONRepresentationOptions {
	/** Optimize for readability */
	OFJSONRepresentationOptionPretty       = 0x01,
	/** Generate JSON5 */
	OFJSONRepresentationOptionJSON5	       = 0x02,
	OFJSONRepresentationOptionIsIdentifier = 0x10
} OFJSONRepresentationOptions;

	uint8_t _byte;
	uint8_t _bitIndex, _savedBitsLength;
	uint16_t _savedBits;
	unsigned char *_slidingWindow;
	uint32_t _slidingWindowIndex, _slidingWindowMask;
	int _state;
	uint16_t _symbolsLeft;
	OFHuffmanTree *_Nullable _codeLenTree, *_Nullable _litLenTree;


	OFHuffmanTree *_Nullable _distTree, *_Nullable _treeIter;
	uint16_t _codesCount, _codesReceived;
	bool _currentIsExtendedLength, _skip;
	uint8_t *_Nullable _codesLengths;
	uint16_t _length;
	uint32_t _distance;
}

#import "OFSerialization.h"

OF_ASSUME_NONNULL_BEGIN

/** @file */

/**
 * @typedef OFListItem
 *
 * @brief A list item.
 *
 * See @ref OFListItemNext, @ref OFListItemPrevious and @ref OFListItemObject.
 */
typedef struct OFListItem *OFListItem;

#ifdef __cplusplus
extern "C" {
#endif
/*!
 * @brief Returns the next list item of the list item.
 *

#import "OFString.h"
#import "OFXMLElement.h"
#import "OFArray.h"

#import "OFEnumerationMutationException.h"
#import "OFInvalidArgumentException.h"

struct OFListItem {
	OFListItem previous, next;
	id object;
};

OF_DIRECT_MEMBERS
@interface OFListEnumerator: OFEnumerator
{
	OFList *_list;

/** @file */

/**
 * @struct OFMapTableFunctions OFMapTable.h ObjFW/OFMapTable.h
 *
 * @brief A struct describing the functions to be used by the map table.
 */
struct OFMapTableFunctions {
	/** The function to retain keys / objects */
	void *_Nullable (*_Nullable retain)(void *_Nullable object);
	/** The function to release keys / objects */
	void (*_Nullable release)(void *_Nullable object);
	/** The function to hash keys */
	unsigned long (*_Nullable hash)(void *_Nullable object);
	/** The function to compare keys / objects */
	bool (*_Nullable equal)(void *_Nullable object1,
	    void *_Nullable object2);
};
typedef struct OFMapTableFunctions OFMapTableFunctions;

#ifdef OF_HAVE_BLOCKS
/**
 * @brief A block for enumerating an OFMapTable.
 *
 * @param key The current key
 * @param object The current object

OF_ASSUME_NONNULL_BEGIN

/** @file */

/**
 * @brief A result of a comparison.
 */
typedef enum OFComparisonResult {
	/** The left object is smaller than the right */
	OFOrderedAscending = -1,
	/** Both objects are equal */
	OFOrderedSame = 0,
	/** The left object is bigger than the right */
	OFOrderedDescending = 1
} OFComparisonResult;

#ifdef OF_HAVE_BLOCKS
/**
 * @brief A comparator to compare two objects.
 *
 * @param left The left object
 * @param right The right object
 * @return The order of the objects
 */
typedef OFComparisonResult (^OFComparator)(id _Nonnull left, id _Nonnull right);
#endif

/**
 * @brief An enum for storing endianess.
 */
typedef enum OFByteOrder {
	/** Most significant byte first (big endian) */
	OFByteOrderBigEndian,
	/** Least significant byte first (little endian) */
	OFByteOrderLittleEndian,
	/** Native byte order of the system */
#ifdef OF_BIG_ENDIAN
	OFByteOrderNative = OFByteOrderBigEndian
#else
	OFByteOrderNative = OFByteOrderLittleEndian
#endif
} OFByteOrder;

/**
 * @struct OFRange OFObject.h ObjFW/OFObject.h
 *
 * @brief A range.
 */
struct OF_BOXABLE OFRange {
	/** The start of the range */
	size_t location;
	/** The length of the range */
	size_t length;
};
typedef struct OFRange OFRange;

/**
 * @brief Creates a new OFRange.
 *
 * @param start The starting index of the range
 * @param length The length of the range
 * @return An OFRangeith the specified start and length

typedef double OFTimeInterval;

/**
 * @struct OFPoint OFObject.h ObjFW/OFObject.h
 *
 * @brief A point.
 */
struct OF_BOXABLE OFPoint {
	/** The x coordinate of the point */
	float x;
	/** The y coordinate of the point */
	float y;
};
typedef struct OFPoint OFPoint;

/**
 * @brief Creates a new OFPoint.
 *
 * @param x The x coordinate of the point
 * @param y The x coordinate of the point
 * @return An OFPoint with the specified coordinates

}

/**
 * @struct OFSize OFObject.h ObjFW/OFObject.h
 *
 * @brief A size.
 */
struct OF_BOXABLE OFSize {
	/** The width of the size */
	float width;
	/** The height of the size */
	float height;
};
typedef struct OFSize OFSize;

/**
 * @brief Creates a new OFSize.
 *
 * @param width The width of the size
 * @param height The height of the size
 * @return An OFSize with the specified width and height

}

/**
 * @struct OFRect OFObject.h ObjFW/OFObject.h
 *
 * @brief A rectangle.
 */
struct OF_BOXABLE OFRect {
	/** The point from where the rectangle originates */
	OFPoint origin;
	/** The size of the rectangle */
	OFSize size;
};
typedef struct OFRect OFRect;

/**
 * @brief Creates a new OFRect.
 *
 * @param x The x coordinate of the top left corner of the rectangle
 * @param y The y coordinate of the top left corner of the rectangle
 * @param width The width of the rectangle

OF_ASSUME_NONNULL_BEGIN

/**
 * @struct OFOptionsParserOption OFOptionsParser.h ObjFW/OFOptionsParser.h
 *
 * @brief An option which can be parsed by an @ref OFOptionsParser.
 */
struct OFOptionsParserOption {
	/** The short version (e.g. `-v`) of the option or `\0` for none. */
	OFUnichar shortOption;

	/**
	 * The long version (e.g. `--verbose`) of the option or `nil` for none.
	 */
	OFString *__unsafe_unretained _Nullable longOption;

	bool *_Nullable isSpecifiedPtr;

	/**
	 * An optional pointer to an `OFString *` that is set to the
	 * argument specified for the option or `nil` for no argument.
	 */
	OFString *__autoreleasing _Nullable *_Nullable argumentPtr;
};
typedef struct OFOptionsParserOption OFOptionsParserOption;

/**
 * @class OFOptionsParser OFOptionsParser.h ObjFW/OFOptionsParser.h
 *
 * @brief A class for parsing the program options specified on the command line.
 */
OF_SUBCLASSING_RESTRICTED

/** @file */

@class OFHMAC;

/**
 * @brief The parameters for @ref OFPBKDF2.
 */
typedef struct OFPBKDF2Parameters {
	/** @brief The HMAC to use to derive a key. */
	__unsafe_unretained OFHMAC *HMAC;
	/** @brief The number of iterations to perform. */
	size_t iterations;
	/** @brief The salt to derive a key with. */
	const unsigned char *salt;
	/** @brief The length of the salt. */

	struct SignalSemaphore semaphore;
	struct Task *joinTask;
	unsigned char joinSigBit;
	bool detached, done;
} *OFPlainThread;
#endif

typedef struct OFPlainThreadAttributes {
	float priority;
	size_t stackSize;
} OFPlainThreadAttributes;

#if defined(OF_HAVE_PTHREADS)
static OF_INLINE OFPlainThread
OFCurrentPlainThread(void)

@class OFString;

#ifndef OF_WINDOWS
# include <dlfcn.h>
typedef void *OFPluginHandle;

typedef enum OFDLOpenFlags {
	OFDLOpenFlagLazy = RTLD_LAZY,
	OFDLOpenFlagNow  = RTLD_NOW
} OFDLOpenFlags;
#else
# include <windows.h>
typedef HMODULE OFPluginHandle;

typedef enum OFDLOpenFlags {
	OFDLOpenFlagLazy = 0,
	OFDLOpenFlagNow  = 0
} OFDLOpenFlags;
#endif

OF_ASSUME_NONNULL_BEGIN

/** @file */

@class OFHMAC;

/**
 * @brief The parameters for @ref OFScrypt.
 */
typedef struct OFScryptParameters {
	/** @brief The block size to use. */
	size_t blockSize;
	/** @brief The CPU/memory cost factor to use. */
	size_t costFactor;
	/** @brief The parallelization to use. */
	size_t parallelization;
	/** @brief The salt to derive a key with. */

#endif

/**
 * @struct OFSocketAddress OFSocket.h ObjFW/OFSocket.h
 *
 * @brief A struct which represents a host / port pair for a socket.
 */
struct OF_BOXABLE OFSocketAddress {
	/*
	 * Even though struct sockaddr contains the family, we need to use our
	 * own family, as we need to support storing an IPv6 address on systems
	 * that don't support IPv6. These may not have AF_INET6 defined and we
	 * can't just define it, as the value is system-dependent and might
	 * clash with an existing value.
	 */
	OFSocketAddressFamily family;
	union {
		struct sockaddr sockaddr;
		struct sockaddr_in in;
		struct sockaddr_in6 in6;
		struct sockaddr_ipx ipx;
	} sockaddr;
	socklen_t length;
};
typedef struct OFSocketAddress OFSocketAddress;

#ifdef __cplusplus
extern "C" {
#endif
/**
 * @brief Parses the specified IP (either v4 or v6) and port into an
 *	  @ref OFSocketAddress.

typedef uint_least32_t OFChar32;
#endif
typedef OFChar32 OFUnichar;

/**
 * @brief The encoding of a string.
 */
typedef enum OFStringEncoding {
	/*
	 * UTF-8 *has* to be 0, so that if the current @ref OFLocale is
	 * `nil`, `[OFLocale encoding]` returns UTF-8.
	 */
	/** UTF-8 */
	OFStringEncodingUTF8,
	/** ASCII */

} OFStringEncoding;

/**
 * @brief Options for searching in strings.
 *
 * This is a bit mask.
 */
typedef enum OFStringSearchOptions {
	/** Search backwards in the string */
	OFStringSearchBackwards = 1
} OFStringSearchOptions;

/**
 * @brief Options for separating strings.
 *
 * This is a bit mask.
 */
typedef enum OFStringSeparationOptions {
	/** Skip empty components */
	OFStringSkipEmptyComponents = 1
} OFStringSeparationOptions;

#ifdef OF_HAVE_BLOCKS
/**
 * @brief A block for enumerating the lines of a string.

#elif defined(OF_WINDOWS)
# include <windows.h>
typedef DWORD OFTLSKey;
#elif defined(OF_MORPHOS)
# include <proto/exec.h>
typedef ULONG OFTLSKey;
#elif defined(OF_AMIGAOS)
typedef struct OFTLSKey {
	struct objc_hashtable *table;
	struct OFTLSKey *next, *previous;
} *OFTLSKey;
#endif

#ifdef __cplusplus
extern "C" {
#endif
extern int OFTLSKeyNew(OFTLSKey *key);

/** @file */

@class OFDate;

/**
 * @brief The type of the archive entry.
 */
typedef enum OFTarArchiveEntryType {
	/** Normal file */
	OFTarArchiveEntryTypeFile	     = '0',
	/** Hard link */
	OFTarArchiveEntryTypeLink	     = '1',
	/** Symbolic link */
	OFTarArchiveEntryTypeSymlink	     = '2',
	/** Character device */

#import "OFObject.h"

OF_ASSUME_NONNULL_BEGIN

/** @file */

typedef enum OFZIPArchiveEntryCompressionMethod {
	OFZIPArchiveEntryCompressionMethodNone		=  0,
	OFZIPArchiveEntryCompressionMethodShrink	=  1,
	OFZIPArchiveEntryCompressionMethodReduceFactor1 =  2,
	OFZIPArchiveEntryCompressionMethodReduceFactor2 =  3,
	OFZIPArchiveEntryCompressionMethodReduceFactor3 =  4,
	OFZIPArchiveEntryCompressionMethodReduceFactor4 =  5,
	OFZIPArchiveEntryCompressionMethodImplode	=  6,
	OFZIPArchiveEntryCompressionMethodDeflate	=  8,
	OFZIPArchiveEntryCompressionMethodDeflate64	=  9,
	OFZIPArchiveEntryCompressionMethodBZIP2		= 12,
	OFZIPArchiveEntryCompressionMethodLZMA		= 14,
	OFZIPArchiveEntryCompressionMethodWavPack	= 97,
	OFZIPArchiveEntryCompressionMethodPPMd		= 98
} OFZIPArchiveEntryCompressionMethod;

/**
 * @brief Attribute compatibility part of ZIP versions.
 */
typedef enum OFZIPArchiveEntryAttributeCompatibility {
	/** MS-DOS and OS/2 */
	OFZIPArchiveEntryAttributeCompatibilityMSDOS	    =  0,
	/** Amiga */
	OFZIPArchiveEntryAttributeCompatibilityAmiga	    =  1,
	/** OpenVMS */
	OFZIPArchiveEntryAttributeCompatibilityOpenVMS	    =  2,
	/** UNIX */

	/** OS X (Darwin) */
	OFZIPArchiveEntryAttributeCompatibilityOSX	    = 19
} OFZIPArchiveEntryAttributeCompatibility;

/**
 * @brief Tags for the extra field.
 */
typedef enum OFZIPArchiveEntryExtraFieldTag {
	/** ZIP64 extra field tag */
	OFZIPArchiveEntryExtraFieldTagZIP64 = 0x0001
} OFZIPArchiveEntryExtraFieldTag;

@class OFString;
@class OFData;
@class OFFile;

# define HAVE_ARM_EHABI_EXCEPTIONS
#endif

struct _Unwind_Context;
typedef enum {
	_URC_OK		  = 0,
	_URC_END_OF_STACK = 5
}_Unwind_Reason_Code;

struct BacktraceCtx {
	void **backtrace;
	uint8_t i;
};

#ifdef HAVE__UNWIND_BACKTRACE