How to find out when an IO thread is created in the Browser Process

[keltion]

Dear All,

I want to know when an IO thread is created in the Browser Process. It seems that the IO thread is created in the RenderProcessHostImpl object, I wonder how exactly I can find it. 

Could you please let me know if there is any way to solve this question?

Thanks,

keltion

[Bruce Dawson]

I put a breakpoint in BrowserThreadImpl::BrowserThreadImpl and then ran Chrome. The first thread created here was the UI thread.  The second one was the IO Thread. This is the call stack that I saw:

     chrome.dll!content::BrowserThreadImpl::BrowserThreadImpl(content::BrowserThread::ID identifier, scoped_refptr<base::SingleThreadTaskRunner> task_runner) Line 104    C++
     chrome.dll!content::BrowserProcessIOThread::RegisterAsBrowserThread() Line 51    C++
>    chrome.dll!content::BrowserMainLoop::CreateThreads() Line 909    C++
     chrome.dll!base::OnceCallback<int ()>::Run() Line 143    C++
     chrome.dll!content::StartupTaskRunner::RunAllTasksNow() Line 43    C++
     chrome.dll!content::BrowserMainLoop::CreateStartupTasks() Line 869    C++
     chrome.dll!content::BrowserMainRunnerImpl::Initialize(content::MainFunctionParams parameters) Line 137    C++
     chrome.dll!content::BrowserMain(content::MainFunctionParams parameters) Line 26    C++

This was on Windows using Visual Studio as the debugger, but the basics should be similar on other operating systems.

So, look in BrowserMainLoop::CreateThreads and maybe you'll find what you are looking for.

[Gabriel Charette]

You actually want to look at BrowserTaskExecutor::CreateIOThread() (BrowserProcessIOThread::RegisterAsBrowserThread() is when we register the previously created IO thread as "BrowserThread::IO").

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[keltion]

Thank you so much for taking the time to reply. Thanks, my question has been solved :)

2022년 7월 6일 수요일 오전 6시 10분 8초 UTC+9에 g...@chromium.org님이 작성: