Where is my kext log(kernel log)

I am new to Mac Os kext development. I want to develop a device driver on macOS Mojave (10.14.2) for my device. I created a demo to check the running process of the driver, but after actually running it, I didn't find any log about the driver.

The following is the source code. Compile with xcode.

IOKitTest.cpp

/* add your code here */
#include "IOKitTest.hpp"
#include <IOKit/IOService.h>
#include <IOKit/IOLib.h>


// 类似cocoa中 super关键字
#define super IOService

// 和头文件中的宏定义类似, 自动生成一些特定的代码
OSDefineMetaClassAndStructors(com_apple_driver_IOKitTest, IOService);

bool com_apple_driver_IOKitTest::init(OSDictionary *dict)
{
  bool result = super::init(dict);
   
  IOLog("IOKitTest : did init !! \n"); // IOlog() 生成log日志, 存在在system.log里
   
  log = os_log_create("com.apple.driver", "XmX");
  os_log(log, "xmx Tests!!");
   
  /** 遍历OSDictionary */
  OSCollectionIterator *iter = OSCollectionIterator::withCollection(dict);
  if (iter)
  {
    OSObject *object = NULL;
    while ((object = iter->getNextObject()))
    {
      OSSymbol *key = OSDynamicCast(OSSymbol, object);
      IOLog("iRedTest : key:%s ",key->getCStringNoCopy());
      OSString *value = OSDynamicCast(OSString, dict->getObject(key));
      if (value != NULL)
      {
        IOLog("iRedTest : value:%s\n",value->getCStringNoCopy());
      }
    }
  }
   
  return result;
}

void com_apple_driver_IOKitTest::free(void)
{
  IOLog("IOKitTest : free \n");
  os_log(log, "xmx Tests!!");
  super::free();
}

IOService *com_apple_driver_IOKitTest::probe(IOService *provider, SInt32 *score)
{
  IOService *probe = super::probe(provider, score);
  return probe;
}

bool com_apple_driver_IOKitTest::start(IOService *provider)
{
  bool result = super::start(provider);
  IOLog("IOKitTest : start \n");
  os_log(log, "xmx Tests!!");
  return result;
}

void com_apple_driver_IOKitTest::stop(IOService *provider)
{
  IOLog("IOKitTest : stop \n");
  os_log(log, "xmx Tests!!");
  super::stop(provider);
}

IOKitTest.hpp

/* add your code here */
#include <IOKit/IOService.h>
#include <os/log.h>

#ifndef IOKitTest_hpp
#define IOKitTest_hpp

class com_apple_driver_IOKitTest : public IOService {
   
  //一个宏定义，会自动生成该类的构造方法、析构方法和运行时
  OSDeclareDefaultStructors(com_apple_driver_IOKitTest);
   
public:
  // 该方法与cocoa中init方法和C++中构造函数类似
  virtual bool init(OSDictionary *dict = 0) APPLE_KEXT_OVERRIDE;
  // 该方法与cocoa中dealloc方法和c++中析构函数类似
  virtual void free(void) APPLE_KEXT_OVERRIDE;
  // 进行驱动匹配时调用
  virtual IOService *probe(IOService *provider, SInt32 *score) APPLE_KEXT_OVERRIDE;
  // 进行加载时调用
  virtual bool start(IOService *provider) APPLE_KEXT_OVERRIDE;
  // 进行卸载时调用
  virtual void stop(IOService *provider) APPLE_KEXT_OVERRIDE;
   
  os_log_t log;
};

#endif /* IOKitTest_hpp */

info.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>CFBundleDevelopmentRegion</key>
	<string>$(DEVELOPMENT_LANGUAGE)</string>
	<key>CFBundleExecutable</key>
	<string>$(EXECUTABLE_NAME)</string>
	<key>CFBundleIdentifier</key>
	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>$(PRODUCT_NAME)</string>
	<key>CFBundlePackageType</key>
	<string>KEXT</string>
	<key>CFBundleShortVersionString</key>
	<string>1.0</string>
	<key>CFBundleVersion</key>
	<string>1</string>
	<key>IOKitPersonalities</key>
	<dict>
		<key>IOKitTest</key>
		<dict>
			<key>CFBundleIdentifier</key>
			<string>com.apple.driver.IOKitTest</string>
			<key>IOClass</key>
			<string>com_apple_driver_IOKitTest</string>
			<key>IOMatchCategory</key>
			<string>com_apple_driver_IOKitTest</string>
			<key>IOProbeScore</key>
			<integer>10000</integer>
			<key>IOProviderClass</key>
			<string>IOResource</string>
			<key>IOResourceMatch</key>
			<string>IOKit</string>
		</dict>
	</dict>
	<key>NSHumanReadableCopyright</key>
	<string>Copyright © 2022 JingCe. All rights reserved.</string>
	<key>OSBundleLibraries</key>
	<dict>
		<key>com.apple.kpi.iokit</key>
		<string>18.2.0</string>
		<key>com.apple.kpi.libkern</key>
		<string>18.2.0</string>
	</dict>
</dict>
</plist>

After the driver is loaded kextstat shows

1. Does the above indicate that the driver is loaded successfully?
2. where to view the kernel log？
3. Where can I learn kext demo？