After call to SwitchToFiber, malloc hangs

[Mihail Stefanov <mihaillive at hotmail dot com>]

Hi,

I have problem with malloc hanging when I SwitchToFiber. I have current environment:
 
CYGWIN_NT-6.1 win7-dev 1.7.27(0.271/5/3) 2013-12-09 11:54 x86_64 Cygwin (Windows 7, x64)

I am trying to use Windows Fibers API in cygwin environment. All is working fine, till the moment I call SwitchToFiber and then malloc. The processor CPU usage goes to 50% and after some time to 100%. In most cases this a result of memory corruption.  In case I do not call malloc, all is working fine. Is this something to do with the stack?

I made small test project attached to the email.

Attachment: fiber.c
Description: Binary data

Attachment: fiber.h
Description: Binary data

Regards
Mihail

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