analyze:基本进程分析

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taynpg 2025-03-03 21:02:37 +08:00
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# 关于运行中的进程运行状态分析
## 一、Linux篇
### 方法1:gcore
测试源码:
```c++
#include <iostream>
#include <thread>
static int g_Mark = 1;
void demo()
{
int i = 60;
while (--i) {
std::this_thread::sleep_for(std::chrono::seconds(1));
}
g_Mark = 0;
}
int main()
{
std::thread t(demo);
t.join();
return 0;
}
```
运行起来,然后查找进程`ID`
```shell
yun@ubuntu:~/Documents$ ps -ef | grep a.out
yun 2259 1990 0 04:44 pts/0 00:00:00 ./a.out
yun 2262 2243 0 04:45 pts/2 00:00:00 grep --color=auto a.out
```
查找到进程的进程`ID`,使用:`sudo gcore -o core.dump 2259`
使用`gdb a.out core.dump.2259`启动调试,以下是基本的指令:
| 指令 | 功能 |
| ------------------- | ---------------------------- |
| bt | 打印当前线程的调用栈 |
| thread apply all bt | 打印所有线程的调用栈 |
| thread <ID> | 切换到指定线程(可以后续bt) |