[webkit-help] How to Debug WebView termination

[tenghu guo]

Sorry for the spam. The last email's format is borken. So I reposted here.

Hi, my app uses webview to render emails. However, some emails always lead
to webview termination. I want to dig into the root cause of the webview
termination.

1.  Here is all the info I got from Xcode console when webview terminated.


*2021-09-16 09:13:16.226266+0800 Outlook-iOS[4850:280029] [Process]
0x14b2c4600 - [PID=4852]
WebProcessProxy::processDidTerminateOrFailedToLaunch: reason=3*
*2021-09-16 09:13:16.226809+0800 Outlook-iOS[4850:280029] [Process]
0x1251d4018 - [pageProxyID=5, webPageID=6, PID=4852]
WebPageProxy::processDidTerminate: (pid 4852), reason 3**2021-09-16
09:13:16.235430+0800 Outlook-iOS[4850:280029] [Loading] 0x1251d4018 -
[pageProxyID=5, webPageID=6, PID=4852]
WebPageProxy::dispatchProcessDidTerminate: reason=3*



2. I also opened the Web Inspector from Safari, but it just hangs and there
is no output in the Console tab. I also enabled Timeline to capture the
memory or cpu usage. There is no info about the termination reason. I guess
that when the webview terminates, it can't send live data to the Web
Inspector. The Web Inspector can't get data for the time right before the
webview termination.

3. I followed the advice by Alexey: " it's probably better to analyze crash
logs from the device, and to watch memory use in Simulator."

How can I get crash logs from the device? I have tried two approaches, but
neither works.
1. Check Settings -> Privacy -> Analytics & Improvements -> Analytics Data
on my iPhone. Nothing related to Webkit or my own app.
2. Connect my iPhone to Xcode and check Xcode -> Devices and Simulators ->
View Device Logs. Nothing related to Webkit or my own app.



Any suggestion for me?

On Thu, Sep 16, 2021 at 1:31 PM tenghu guo <guotenghu at gmail.com> wrote:

> Hi, my app uses webview to render emails. However, some emails always lead
> to webview termination. I want to dig into the root cause of the webview
> termination.
>
> Here is all the info I got from Xcode console when webview terminated.
>
> *2021-09-16 09:13:16.226266+0800 Outlook-iOS[4850:280029] [Process]
> 0x14b2c4600 - [PID=4852]
> WebProcessProxy::processDidTerminateOrFailedToLaunch: reason=3*
>
> *2021-09-16 09:13:16.226809+0800 Outlook-iOS[4850:280029] [Process]
> 0x1251d4018 - [pageProxyID=5, webPageID=6, PID=4852]
> WebPageProxy::processDidTerminate: (pid 4852), reason 3*
>
> *2021-09-16 09:13:16.235430+0800 Outlook-iOS[4850:280029] [Loading]
> 0x1251d4018 - [pageProxyID=5, webPageID=6, PID=4852]
> WebPageProxy::dispatchProcessDidTerminate: reason=3*
>
>
> I also opened the Web Inspector from Safari, but it just hangs and there
> is no output in the Console tab. I also enabled Timeline to capture the
> memory or cpu usage. There is no info about the termination reason. I guess
> that when the webview terminates, it can't send live data to the Web
> Inspector. The Web Inspector can't get data for the time right before the
> webview termination.
>
> I followed the advice by Alexey: " it's probably better to analyze crash
> logs from the device, and to watch memory use in Simulator."
>
> How can I get crash logs from the device? I have tried two approaches, but
> neither works.
> 1. Check Settings -> Privacy -> Analytics & Improvements -> Analytics
> Data on my iPhone. Nothing related to Webkit or my own app.
> 2. Connect my iPhone to Xcode and check Xcode -> Devices and Simulators
> -> View Device Logs. Nothing related to Webkit or my own app.
>
>
> Any suggestion for me?
>
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