macro.m

#if DEBUG
#import <objc/runtime.h> 
#import <objc/message.h>
#include <execinfo.h>
#include <stdio.h>

void dumpCall(id *__selfPtr, SEL __cmd) {
    
    // Get argument stack
    id __self = *__selfPtr;
    void *stack = __selfPtr; 
    stack += sizeof(__self) + sizeof(__cmd); 
    
    // Prepare Method info
    Method method = class_getInstanceMethod([__self class], __cmd); 
    NSArray *parts = [NSStringFromSelector(method_getName(method)) componentsSeparatedByString:@":"]; 
    NSString *output = [NSString stringWithFormat:@"* -[%@", NSStringFromClass([__self class])]; 
    
    // Loop arguments
    for(unsigned i = 2; i < method_getNumberOfArguments(method); i++) {         
        char *argtype = method_copyArgumentType(method, i); 
        
        // Object
        if(strlen(argtype) == 1) {
            if(argtype[0] == '@') { 
                id o = (id)*(Handle)stack;
                if([o isKindOfClass:[NSString class]]) {
                    output = [output stringByAppendingFormat:@" %@:@%@", [parts objectAtIndex:i - 2], [o repr]]; 
                } else {
                    output = [output stringByAppendingFormat:@" %@:%@", [parts objectAtIndex:i - 2], o]; 
                }
                stack += sizeof(o); 
                
            } 
            else if(argtype[0] == 'i') { 
                int *v = stack;
                output = [output stringByAppendingFormat:@" %@:%d", [parts objectAtIndex:i - 2], *v]; 
                stack += sizeof(int); 
            }

            // ...

            else { 
                output = [output stringByAppendingFormat:@" %@:***fail at '%s' ***", [parts objectAtIndex:i - 2], argtype]; 
                break; 
            } 
        } else {
            if(strcmp(argtype, "{CGPoint=") > 0) {
                CGPoint *v = (CGPoint *)(Handle)stack;
                output = [output stringByAppendingFormat:@" %@:%@", [parts objectAtIndex:i - 2], NSStringFromCGPoint(*v)]; 
                stack += sizeof(CGPoint);                 
            } 

            // ...

            else {
                output = [output stringByAppendingFormat:@" %@:***fail at '%s' ***", [parts objectAtIndex:i - 2], argtype]; 
                break; 
            }
        }
        free(argtype); 
    } 
    NSLog(@"%@]", output); 
}

#define XPingFull dumpCall(&self, _cmd);
#endif

Here is a complete implementation http://twitter.com/holtwick/status/29075126032