navigator.hardwareConcurrency的属性,可以用来获取CPU的逻辑处理器核心数。

1、navigator.hardwareConcurrency接口定义：

third_party\blink\renderer\core\frame\navigator_concurrent_hardware.idl

// https://html.spec.whatwg.org/C/#navigator.hardwareconcurrency

interface mixin NavigatorConcurrentHardware {
    [HighEntropy=Direct, MeasureAs=NavigatorHardwareConcurrency] readonly attribute unsigned long long hardwareConcurrency;
};

2、navigator.hardwareConcurrency接口实现：

third_party\blink\renderer\core\frame\navigator_concurrent_hardware.cc

third_party\blink\renderer\core\frame\navigator_concurrent_hardware.h

#include "base/system/sys_info.h"

namespace blink {

unsigned NavigatorConcurrentHardware::hardwareConcurrency() const {
  return static_cast<unsigned>(base::SysInfo::NumberOfProcessors());
}

}  // namespace blink

3、在NavigatorConcurrentHardware::hardwareConcurrency()函数里面直接修改核心数为120编译看下效果：

unsigned NavigatorConcurrentHardware::hardwareConcurrency() const {
  return 120;
  //return static_cast<unsigned>(base::SysInfo::NumberOfProcessors());
}

4、调用堆栈：

5、效果：

 6、总结：

至此cpu逻辑处理器核心指纹修改完毕。