Small example of livelock regression in garbage collector forGCJ 3.3 under Win32

Wed May 21 18:47:00 GMT 2003

> > >>You need -fuse-divide-subroutine and -fcheck-references. Ranjit ahd a
> > >>look at using Windows' structured exception handling to cope with
> > >>these problems, but I don't think that it's done yet.
> >
> > Andrew, if I understand this correctly, you are suggesting that
> > we use these options for the time being till such a time
> > that we can fix the SEH stuff.
> >
> > These will make things a bit slower, but keep it correct:
> >
> > http://gcc.gnu.org/onlinedocs/gcj/Configure-time-Options.html
> >
> > Right?
>> Indeed. It looks to me like mingw picks up the configure options from
> i686-*. We need to make this a little more finely grained with a
> separate entry for Linux and mingw.

[...]
> Please also submit a patch for configure.host that does the right thing.
>> Andrew.

How does the following look (tested only on Win98 so far)? It's
against 3.3 sources:
Index: ChangeLog
from Ranjit Mathew <rmathew@hotmail.com>
	* configure.host: Use -fcheck-references and 
	-fuse-divide-subroutine for MinGW until we fix
	win32_exception_handler( ) in win32.cc w.r.t. Win32 
	Structured Exception Handling (SEH).
Index: configure.host
===================================================================

--- configure.host	2003年05月21日 19:52:07.000000000 +0530
+++ configure.host	2003年05月21日 22:39:40.000000000 +0530
@@ -175,4 +175,11 @@
 	slow_pthread_self=
 	;;
+ *-mingw*)
+ 	# FIXME: win32_exception_handler( ) in win32.cc does not do the
+	# right stuff yet w.r.t. SEH. Live with the following for now.
+	can_unwind_signal=no
+	CHECKREFSPEC=-fcheck-references
+	DIVIDESPEC=-fuse-divide-subroutine
+	;;
 *-cygwin*)
 	# The cygwin linker doesn't do 8-byte alignment by default, so
