fishhook hook NSSetUncaughtExceptionHandler

main.m

#import "AppDelegate.h"
#import "fishhook.h"
#import <dlfcn.h>

static NSUncaughtExceptionHandler *g_vaildUncaughtExceptionHandler;
static void (*ori_NSSetUncaughtExceptionHandler)( NSUncaughtExceptionHandler * );

void my_NSSetUncaughtExceptionHandler( NSUncaughtExceptionHandler * handler)
{
    g_vaildUncaughtExceptionHandler = NSGetUncaughtExceptionHandler();
    if (g_vaildUncaughtExceptionHandler != NULL) {
        NSLog(@"UncaughtExceptionHandler=%p",g_vaildUncaughtExceptionHandler);
    }
    
    ori_NSSetUncaughtExceptionHandler(handler);
    NSLog(@"%@",[NSThread callStackSymbols]);
    
    g_vaildUncaughtExceptionHandler = NSGetUncaughtExceptionHandler();
    NSLog(@"UncaughtExceptionHandler=%p",g_vaildUncaughtExceptionHandler);
}

int main(int argc, char *argv[])
{
    @autoreleasepool {
        ori_NSSetUncaughtExceptionHandler = dlsym(RTLD_DEFAULT, "NSSetUncaughtExceptionHandler");
        rebind_symbols((struct rebinding[1]){{"NSSetUncaughtExceptionHandler", my_NSSetUncaughtExceptionHandler, (void **)&ori_NSSetUncaughtExceptionHandler}}, 1);
        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
    }
}