ObjFW  Check-in [f93fae010f]

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Comment:OFException: Provide stack trace addresses
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SHA3-256: f93fae010f845d4978351ae5f77f719bf1aa737a631d21622b595de240a0409e
User & Date: js on 2022-09-29 21:26:08
Other Links: manifest | tags
Context
2022-09-29
21:53
OFURI: Make query items an array of pairs check-in: bd6dd6dd00 user: js tags: trunk
21:26
OFException: Provide stack trace addresses check-in: f93fae010f user: js tags: trunk
20:27
OFLocale: Rename a few methods check-in: 915bfc7431 user: js tags: trunk
Changes
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Modified src/OFObject.m from [1199f442fe] to [da1d529dc6].

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#import "OFRunLoop.h"
#if !defined(OF_HAVE_ATOMIC_OPS) && defined(OF_HAVE_THREADS)
# import "OFPlainMutex.h"	/* For OFSpinlock */
#endif
#import "OFString.h"
#import "OFThread.h"
#import "OFTimer.h"
#import "OFValue.h"

#import "OFAllocFailedException.h"
#import "OFEnumerationMutationException.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFNotImplementedException.h"
#import "OFOutOfMemoryException.h"
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}

#if !defined(OF_APPLE_RUNTIME) || defined(__OBJC2__)
static void
uncaughtExceptionHandler(id exception)
{
	OFString *description = [exception description];
	OFArray *backtrace = nil;
	OFArray OF_GENERIC(OFValue *) *stackTraceAddresses = nil;
	OFArray OF_GENERIC(OFString *) *stackTraceSymbols = nil;
	OFStringEncoding encoding = [OFLocale encoding];

	fprintf(stderr, "\nRuntime error: Unhandled exception:\n%s\n",
	    [description cStringWithEncoding: encoding]);

	if ([exception respondsToSelector: @selector(backtrace)])
		backtrace = [exception backtrace];
	if ([exception respondsToSelector: @selector(stackTraceAddresses)])
		stackTraceAddresses = [exception stackTraceAddresses];

	if (stackTraceAddresses != nil) {
		size_t count = stackTraceAddresses.count;

		if ([exception respondsToSelector:
		    @selector(stackTraceSymbols)])
			stackTraceSymbols = [exception stackTraceSymbols];
	if (backtrace != nil) {
		OFString *s = [backtrace componentsJoinedByString: @"\n  "];
		fprintf(stderr, "\nBacktrace:\n  %s\n\n",
		    [s cStringWithEncoding: encoding]);

		if (stackTraceSymbols.count != count)
			stackTraceSymbols = nil;

		fputs("\nBacktrace:\n", stderr);

		if (stackTraceSymbols != nil) {
			for (size_t i = 0; i < count; i++) {
				void *address = [[stackTraceAddresses
				    objectAtIndex: i] pointerValue];
				const char *symbol = [[stackTraceSymbols
				    objectAtIndex: i]
				    cStringWithEncoding: encoding];

				fprintf(stderr, "  %p  %s\n", address, symbol);
			}
		} else {
			for (size_t i = 0; i < count; i++) {
				void *address = [[stackTraceAddresses
				    objectAtIndex: i] pointerValue];

				fprintf(stderr, "  %p\n", address);
			}
		}

		fputs("\n", stderr);
	}

	abort();
}
#endif

static void
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Modified src/exceptions/OFException.h from [6d2e250849] to [e7c0836484].

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#ifdef OF_WINDOWS
# include <windows.h>
#endif

OF_ASSUME_NONNULL_BEGIN

@class OFArray OF_GENERIC(ObjectType);
@class OFMutableArray OF_GENERIC(ObjectType);
@class OFString;
@class OFString;
@class OFValue;

#define OFBacktraceSize 16
#define OFStackTraceSize 16

#if defined(OF_WINDOWS) && defined(OF_HAVE_SOCKETS)
# ifndef EADDRINUSE
#  define EADDRINUSE WSAEADDRINUSE
# endif
# ifndef EADDRNOTAVAIL
#  define EADDRNOTAVAIL WSAEADDRNOTAVAIL
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 * @brief The base class for all exceptions in ObjFW
 *
 * The OFException class is the base class for all exceptions in ObjFW, except
 * the OFAllocFailedException.
 */
@interface OFException: OFObject
{
	void *_backtrace[OFBacktraceSize];
	void *_stackTrace[OFStackTraceSize];
	OF_RESERVE_IVARS(OFException, 4)
}

/**
 * @brief Creates a new, autoreleased exception.
 *
 * @return A new, autoreleased exception
 */
+ (instancetype)exception;

/**
 * @brief Returns a description of the exception.
 *
 * @return A description of the exception
 */
- (OFString *)description;

/**
 * @brief Returns a backtrace of when the exception was created or nil if no
 *	  backtrace is available.
 * @brief Returns a stack trace of when the exception was created or `nil` if
 *	  no stack trace is available. The returned array contains OFValues
 *	  with @ref OFValue#pointerValue set to the address.
 *
 * @return The stack trace as array of addresses
 */
- (nullable OFArray OF_GENERIC(OFValue *) *)stackTraceAddresses;

/**
 * @return A backtrace of when the exception was created
 * @brief Returns a stack trace of when the exception was created or `nil` if
 *	  no stack trace symbols are available.
 *
 * @return The stack trace as array of symbols
 */
- (nullable OFArray OF_GENERIC(OFString *) *)backtrace;
- (nullable OFArray OF_GENERIC(OFString *) *)stackTraceSymbols;
@end

#ifdef __cplusplus
extern "C" {
#endif
extern OFString *OFStrError(int errNo);
#ifdef OF_WINDOWS
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Modified src/exceptions/OFException.m from [21f1fa3002] to [700714ee53].

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#import "OFArray.h"
#import "OFLocale.h"
#ifdef OF_HAVE_THREADS
# import "OFPlainMutex.h"
#endif
#import "OFString.h"
#import "OFSystemInfo.h"
#import "OFValue.h"

#import "OFInitializationFailedException.h"
#import "OFLockFailedException.h"
#import "OFUnlockFailedException.h"

#if defined(OF_WINDOWS) && defined(OF_HAVE_SOCKETS)
# include <winerror.h>
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#ifdef HAVE__UNWIND_BACKTRACE
static _Unwind_Reason_Code
backtraceCallback(struct _Unwind_Context *ctx, void *data)
{
	struct BacktraceCtx *bt = data;

	if (bt->i < OFBacktraceSize) {
	if (bt->i < OFStackTraceSize) {
# ifndef HAVE_ARM_EHABI_EXCEPTIONS
		bt->backtrace[bt->i++] = (void *)_Unwind_GetIP(ctx);
# else
		uintptr_t ip;

		_Unwind_VRS_Get(ctx, 0, 15, 0, &ip);
		bt->backtrace[bt->i++] = (void *)(ip & ~1);
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#ifdef HAVE__UNWIND_BACKTRACE
- (instancetype)init
{
	struct BacktraceCtx ctx;

	self = [super init];

	ctx.backtrace = _backtrace;
	ctx.backtrace = _stackTrace;
	ctx.i = 0;
	_Unwind_Backtrace(backtraceCallback, &ctx);

	return self;
}
#endif

- (OFString *)description
{
	return [OFString stringWithFormat:
	    @"An exception of type %@ occurred!", self.class];
}

- (OFArray OF_GENERIC(OFString *) *)backtrace
- (OFArray OF_GENERIC(OFValue *) *)stackTraceAddresses
{
#ifdef HAVE__UNWIND_BACKTRACE
	OFMutableArray OF_GENERIC(OFString *) *backtrace =
	OFMutableArray OF_GENERIC(OFValue *) *stackTrace =
	    [OFMutableArray array];
	void *pool = objc_autoreleasePoolPush();

	for (uint_fast8_t i = 0; i < OFStackTraceSize &&
	for (uint8_t i = 0; i < OFBacktraceSize && _backtrace[i] != NULL; i++) {
# ifdef HAVE_DLADDR
	    _stackTrace[i] != NULL; i++)
		[stackTrace addObject:
		    [OFValue valueWithPointer: _stackTrace[i]]];

	objc_autoreleasePoolPop(pool);

	[stackTrace makeImmutable];

	return stackTrace;
#else
	return nil;
#endif
}

- (OFArray OF_GENERIC(OFString *) *)stackTraceSymbols
{
#if defined(HAVE__UNWIND_BACKTRACE) && defined(HAVE_DLADDR)
	OFMutableArray OF_GENERIC(OFString *) *stackTrace =
	    [OFMutableArray array];
	void *pool = objc_autoreleasePoolPush();

	for (uint_fast8_t i = 0; i < OFStackTraceSize &&
	    _stackTrace[i] != NULL; i++) {
		Dl_info info;

		if (dladdr(_backtrace[i], &info)) {
		if (dladdr(_stackTrace[i], &info)) {
			ptrdiff_t offset = (char *)_stackTrace[i] -
			    (char *)info.dli_saddr;
			OFString *frame;

			if (info.dli_sname != NULL) {
				ptrdiff_t offset = (char *)_backtrace[i] -
				    (char *)info.dli_saddr;

			if (info.dli_fname != NULL && info.dli_sname != NULL)
				frame = [OFString stringWithFormat:
				    @"%s`%s+%td",
				    info.dli_fname, info.dli_sname, offset];
			else if (info.dli_sname != NULL)
				frame = [OFString stringWithFormat:
				    @"%p <%s+%td> at %s",
				    _backtrace[i], info.dli_sname, offset,
				    info.dli_fname];
			} else
				    @"%s+%td", info.dli_sname, offset];
			else if (info.dli_fname != NULL)
				frame = [OFString stringWithFormat:
				    @"%s`%p", info.dli_fname, _stackTrace[i]];
			else
				frame = [OFString stringWithFormat:
				    @"%p <?" @"?> at %s",
				    _backtrace[i], info.dli_fname];
				    @"%p", _stackTrace[i]];

			[backtrace addObject: frame];
			[stackTrace addObject: frame];
		} else
# endif
			[backtrace addObject:
			    [OFString stringWithFormat: @"%p", _backtrace[i]]];
			[stackTrace addObject:
			    [OFString stringWithFormat: @"%p", _stackTrace[i]]];
	}

	objc_autoreleasePoolPop(pool);

	[backtrace makeImmutable];
	[stackTrace makeImmutable];

	return backtrace;
	return stackTrace;
#else
	return nil;
#endif
}
@end

Fossil 2.23 [47362306a7] 2023-11-01 18:56:47
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