CreateFileMapping/MapViewOfFile and fork

[Sean Daley]

As part of an application we're developing, we use
CreateFileMapping/MapViewOfFile to be able to share information among
processes.  I noticed today that if I try to reference the map
immediately after calling fork() but before calling exec, that my
application will crash.

I should be able to resolve this in my app but I was just curious if
this was unexpected behavior or not.

I've attached a test program parent_test.cpp and my cygcheck.out.

######################
sdaley@sdaley2 ~
$ gcc -Wall parent_test.cpp -o parent_test

sdaley@sdaley2 ~
$ ./parent_test.exe
Dumping map in parent
 --> length = 11
 --> name = test-string
Dumping map in child
     17 [main] parent_test 2460 _cygtls::handle_exceptions: Error while dumping
state (probably corrupted stack)

sdaley@sdaley2 ~
$
######################

Sean
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