在二进制文件中使用libxhook对__android_log_print进行hook，hook不成功

[yangsusuqq]

static int my_android_log_print(int prio, const char* tag, const char* fmt, ...)
{
va_list ap;
char buf[1024];
int r;
int n = 100;

va_start(ap, fmt);
r = __android_log_print(ANDROID_LOG_INFO, "ProjectName", "I am : %d/n", n);
va_end(ap);

}
static void test_invoke_hook(){
int res = xhook_register("^/system/.*\.so$", "__android_log_print", my_android_log_print, NULL);
if(res != 0){
printf("register failed\n");
return;
} else {
printf("register success\n");
}

while(1){
    int res_r = xhook_refresh(0);
    if(res_r != 0){
        printf("refresh failed\n");
    } else {
        printf("refresh success\n");
    }
    sleep(3);
}

}

出现register success
refresh success,
可是logcat里面没有I am的信息