1. The Windows Installer creates separate processes for Custom Actions. The
WiX toolset does the same for managed custom actions for the reasons Jacob
pointed out.
2. Threads execute independently in a process. Unless you write code to
ensure one thread outlasts another (Thread.Join?) there is no guarantee
which threads still exists as threads exit.
On Sun, Feb 17, 2013 at 8:45 PM, Yun Li <nic...@gmail.com> wrote:
> I'm using C++, and the thread is created when I initialize a HTTP request
> in custom action, i.e., it is created by Windows WinInet API
> HttpSendRequest().
> The http callback thread crashes when the custom action finishes.
> There will be an exception dialog appear when this problem happens, but
> the installation can continue to finish, seems it doesn't influence the
> main install process.
>
>
> On Mon, Feb 18, 2013 at 12:27 PM, Hoover, Jacob <
> jacob.hoo...@greenheck.com> wrote:
>
>> How exactly are you creating this thread? What language and framework
>> are you using?
>>
>> Sent from my iPhone
>>
>> On Feb 17, 2013, at 8:48 PM, "Yun Li" <nic...@gmail.com> wrote:
>>
>> Thanks for you reply.
>>
>> So if I understand correctly, actually WIX will create a process for
>> each custom action. However, I can't figure out why the http thread created
>> in the custom action doesn't exit when the process exit, it continues to
>> execute and leads to a crash when try to access heap memories in the
>> process.
>> Is there a way to resolve this?
>>
>> Thanks!
>> Yun
>>
>> On Sun, Feb 17, 2013 at 12:12 AM, Hoover, Jacob <
>> jacob.hoo...@greenheck.com> wrote:
>>
>>> I believe this is caused by any .net ca being done in a separate stub
>>> process. Prior to .net 4, you could only have one version of the clr loaded
>>> during the life of the process. The wix fix which allows us to overcome
>>> this is using child stub processes and ipc to overcome this.
>>>
>>>
>>> On Feb 16, 2013, at 7:26 AM, "Yun Li" <nic...@gmail.com> wrote:
>>>
>>> Hi, WIX Devs
>>>
>>> Thanks for such a great tool!
>>>
>>> I have a problem developing my own installers with Wix.
>>> I defined several custom actions in a DLL, these functions share a same
>>> behavior that they need to send the instrumentation data to our server
>>> through HTTP request.
>>> When WIX calls a custom action, as my observation, it starts a new
>>> thread for the function, and the thread exits after the function is
>>> returned.
>>> However, the problem is when the thread exits, *the heap storage
>>> created in the custom action thread is also removed*! Which leads to a
>>> crash when HTTP callback thread tries to access the objects created in the
>>> heap.
>>> What described above is only my observation, I just want to confirm
>>> whether this is really the memory management method of thread adopted by
>>> WIX (something like ThreadLocal, if I understand correctly), therefore we
>>> can think about other ways for solution.
>>>
>>> Thanks,
>>> Yun
>>>
>>>
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>
>
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