+ (NSString*) exceptionReport:(NSException*) exception

ExceptionReport.m

#import <execinfo.h>
#import <ExceptionHandling/ExceptionHandling.h>

+ (NSString*) exceptionReport:(NSException*) exception
{
    NSMutableString* report = [NSMutableString new];
    NSMutableArray *addresses = [NSMutableArray new];
    NSString *stackTrace = [[exception userInfo] objectForKey:NSStackTraceKey];
    NSScanner *scanner = [NSScanner scannerWithString:stackTrace];
    NSString *token;
    
    [report appendString:[NSString stringWithFormat:@"%@ %@\n\n%@\n\n", exception.name, exception.reason, exception.userInfo]];
    
    while ([scanner scanUpToCharactersFromSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]
                                   intoString:&token]) {
        [addresses addObject:token];
    }
    
    NSUInteger numFrames = [addresses count];
    if (numFrames > 0) {
        void **frames = (void **)malloc(sizeof(void *) * numFrames);
        NSUInteger i, parsedFrames;
        
        for (i = 0, parsedFrames = 0; i < numFrames; i++) {
            NSString *address = [addresses objectAtIndex:i];
            NSScanner* addressScanner = [NSScanner scannerWithString:address];
            
            if (![addressScanner scanHexLongLong:(unsigned long long *)&frames[parsedFrames]]) {
                NSLog(@"%@ failed to parse frame address '%@'", [self className], address);
                break;
            }
            
            parsedFrames++;
        }
        
        if (parsedFrames > 0) {
            char **frameStrings = backtrace_symbols(frames, (int)parsedFrames);
            if (frameStrings) {
                for (unsigned i = 0; i < numFrames && frameStrings[i] ; i++) {
                    [report appendString:[NSString stringWithUTF8String:(char *)frameStrings[i]]];
                    [report appendString:@"\n"];
                }
                free(frameStrings);
            }
        }
        
        free(frames);
    }
    return report;
}