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From "Alexey Varlamov" <alexey.v.varla...@gmail.com>
Subject Re: [drlvm] tests failing on Win2000 PIII
Date Thu, 05 Apr 2007 05:21:32 GMT
2007/4/5, Gregory Shimansky <gshimansky@gmail.com>:
> On Friday 02 March 2007 21:56 Geir Magnusson Jr. wrote:
> > I thought it used to work.  Also, I thought that someone had shown
> > that Win2k was still widely deployed.  maybe that's win2k+3?  (I can
> > never keep the windows platform family straight anymore...)
>
> Resurrecting this old thread about w2k, Nathan, what happens if you just
> comment out the line with AddVectoredExceptionHandler? In this case you'll
> lose a handler registration, so you will not have hardware NPEs (I am not
> sure about the JIT status for ia32, are hardware NPEs enabled for this
> architecture?), you won't have JVMTI breakpoints in JIT mode, so debugging
> won't work. But the rest of VM should work on w2k with the exception of the
> code which uses P4 specific instructions.
>
> If this helps to at least start running the VM, I think it could be possible
> to move from vectored exceptions to older structured ones on w2k and make it
> a supported platform.

I'd also suggest straightforward solution: test Windows version at
startup and either setup VEH on modern OSes or export special JNI
table of SEH-wrapped functions on w2k. This way we'll have the same
feature set on all flavours of Windows and no compromise to
performance.

>
> If you get illegal instruction like mfence on w2k as well, probably the
> modifications which Evgueni Brevnov is going to offer for P3 backport on
> Linux could help you running at least something...
>
> I am asking because I don't have either w2k or P3 processor, so all I can do
> to help right now is give some suggestions.
>
> > geir
> >
> > On Feb 26, 2007, at 8:31 PM, Nathan Beyer wrote:
> > > Thanks for details.
> > >
> > > So I guess I'll ask the question again, is there a desire for Win2K
> > > support? I'm not sure I really have an opinion one way or the other.
> > > In relation to the previous discussion, I do think we should maintain
> > > a single code base, so I guess this means either coding to the
> > > lowest-common spec, some sort of test-and-branch or C macros (?).
> > >
> > > I do think it would be helpful to spit out a "OS not supported" error
> > > condition in these cases.
> > >
> > > -Nathan
> > >
> > > On 2/26/07, Alex Astapchuk <alex.astapchuk@gmail.com> wrote:
> > >> Btw, the w2k issue has been raised before. Start of the tread is
> > >> here:
> > >>
> > >> http://mail-archives.apache.org/mod_mbox/harmony-dev/200608.mbox/%
> > >> 3c44D36A45.802@pobox.com%3e
> > >>
> > >> then it turns into 'platform support':
> > >>
> > >> http://mail-archives.apache.org/mod_mbox/harmony-dev/200608.mbox/%
> > >> 3c44D9A4C7.1010607@gmail.com%3e
> > >>
> > >> and HARMONY-1145 was filed against the issue.
> > >>
> > >> --
> > >> Thanks,
> > >>    Alex
> > >>
> > >> Alex Astapchuk wrote:
> > >> > Hi Nathan,
> > >> >
> > >> >  > Failed to open JVM DLL:
> > >> >
> > >> > C:\bt-trunk\cc\projects\drlvm\trunk\build\win_ia32_msvc_debug
> > >>
> > >> \deploy\jdk\jre\bin\default\harmonyvm
> > >>
> > >> > DRLVM can not be run on Win2000: it uses 'vectored exception
> > >> > handler' [1] (instead of old-fashion structured exception handler),
> > >> > and this feature requires at least WinXP/Win2k3 [2].
> > >> >
> > >> > There may be more XP-specific functions I'm not aware about, but
> > >> > at least this one will make the loading fail because the loader
> > >> > can not find AddVectoredExceptionHandler export in kernel32.dll.
> > >> >
> > >> > [1] vm\vmcore\src\util\win\nt_platform_utils.cpp
> > >> >      grep for AddVectoredExceptionHandler around the line 63.
> > >> >
> > >> > [2] http://msdn2.microsoft.com/en-us/library/ms679274.aspx
> > >> >
> > >> > Requirements
> > >> > Client Requires Windows Vista or Windows XP.
> > >> > Server Requires Windows Server "Longhorn" or Windows Server 2003.
> > >> > Header Declared in Winbase.h; include Windows.h.
> > >> > Library Use Kernel32.lib.
> > >> > DLL Requires Kernel32.dll.
>
> --
> Gregory
>

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