[Bug 24101] Recursive CreateProcess() fails

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=24101

--- Comment #21 from Guillaume ORTEGA <guillaume.ortega at OpenPlug.com> 2010-08-31 10:51:30 CDT ---
Hello,

I did some new investigations. 
I tested my project (Bug Zip) on Linux:
- Kubuntu 10.04
- Wine 1.2 (auto installed with apt-get)
- Dual Core cpu
- With a call to ulimit -n 10000

And the test project work. It seems to be a problem with the MacOS Porting
part.

My company try to port an IDE to MacOSX with the help of Wine.
We only have problems when compiling a big project on MacOSX, the product use
GNU make and arm-gcc to compile this project.

The building process create cascaded process :
- 1 Process run Gnu Make
- 1 Sub make is created with -j3 (problem also with -j1)
- 3 Sub makes creates an OP_Gen.exe process that run gcc
- 1 and gcc run also cc1, collect ect...
- And make also create sub batch (.bat) scripts in all steps

I identify the problem, and it's related to create cascaded process, I create
the project in attachement Bug Zip to Debug easyly.

I investigate with traces, I detect 2 part that cause the problems :

- process_poll_events (server/process.c) on the server is called with argument
event at 11, before the child process begin (on the fork of create_process
(dlls/kernel32/process.c))

- the child start at create_process (dlls/kernel32/process.c) and stop on
server_init_thread(dlls/ntdll/server.c) on wine_server_send_fd( reply_pipe[1]
);. And on wine_server_send_fd I get the EPIPE error with the sendmsg.

It seems the communication socket (create with socketpair) is closed somewhere
else.

We are disposed to debug ourselves the bug and make a patch for the community.

Could someone could help us to investigate the problem?
Where in the porting could be the problem? 

Best Regards,

Guillaume ORTEGA.

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