> On May 10, 2016, at 3:11 PM, Sangjin Han <tinysun....@gmail.com> wrote:
>
> Joe,
>
> LLVM's MCJIT? Did you mean the REPL mode?
By immediate mode, do you mean "swift foo.swift", where the script is
immediately compiled and executed? That also uses MCJIT.
>
> I'm not ready to ask a question or understand the answer about them. Maybe it
> takes some time for me to handle them.
> Currently, I want to concentrate on the immediate mode, dynamic/static
> linking on Windows (MSVC).
I suspect that this is because of an LLVM bug in handling dllimport/export in
JIT mode. Asking the LLVM list, you should at least be able to confirm this,
and maybe get help from other LLVM users who've run into similar issues.
-Joe
>
> By the way, in Cygwin (although it uses similar ABI and the COFF format),
> immediate mode and dynamic linking worked without the dll import/export
> consideration, it was 'ld''s magic. The immediate mode in Cygwin does not
> work if dllimport is applied. (same to Windows(MSVC) )
>
> I think we may consider for only MSVC, if the REPL in Cygwin works without
> dllimport consideration.
>
> -Han Sangjin
>
> 2016-05-10 2:06 GMT+09:00 Joe Groff <jgr...@apple.com>:
>
> > On May 7, 2016, at 4:01 PM, Sangjin Han <tinysun....@gmail.com> wrote:
> >
> > Hi all,
> >
> > I merged Saleem's #2080 to my working branch, and did some experiment.
> >
> > I could compile easily Hello.swift with #2080 merged one.
> >
> > swiftc -c -o Hello.obj Hello.swift
> > clang -o Hello.exe Hello.obj -llibswiftCore -llibswiftSwiftOnoneSupport
> > -Wl,<some link options>
> >
> > Without #2080, I should use the *.ll-modifying-trick. It is perfect in this
> > example.
> >
> > But, we need the way to disable dllimport. The immediate mode did not work.
>
> If it only affects immediate mode, this might be a problem with LLVM's MCJIT.
> I would recommend asking llvm-dev, cc-ing Lang Hames (lha...@apple.com), to
> see what the right thing to do to reference DLL exports from JIT code is.
>
> -Joe
>
> > swift Hello.swift
> > LLVM ERROR: Program used external function
> > '__imp_globalinit_33_1BDF70FFC18749BAB495A73B459ED2F0_func3' which could
> > not be resolved!
> >
> > swift -O Hello.swift
> > LLVM ERROR: Program used external function
> > '__imp__swift_getExistentialTypeMetadata' which could not be resolved!
> >
> > It seems swift.exe call directly the function in the DLL without import
> > library.
> >
> > The feature also needed when we link to static library.
> >
> > I don't know about the SIL, IR, so it is thankful someone tell me how to
> > approach this problem.
>
>
>
> >
> > 2016-05-07 5:01 GMT+09:00 Saleem Abdulrasool <compn...@compnerd.org>:
> > On Thu, May 5, 2016 at 5:26 PM, Joe Groff via swift-dev
> > <swift-dev@swift.org> wrote:
> >
> > > On May 5, 2016, at 4:18 PM, Sangjin Han via swift-dev
> > > <swift-dev@swift.org> wrote:
> > >
> > > Hi,
> > >
> > > I made an experimental MSVC port. Of cause, dllimport/dllexport and the
> > > driver for linking and many other part is not implemented. But dynamic
> > > linking was possible with some trick.
> > >
> > > I think it is useful for designing, my observation about the experimental
> > > building of libswiftCore.dll, libswiftSwiftOnoneSupport.dll and linking
> > > of Hello.exe - its source has only 'print("Hello")'.
> > >
> > > 1) SWIFT_RUNTIME_EXPORT was not enough for dllexport.
> > > Hello.obj needed defined in libswift*.dll
> > > _swift_getExistentialTypeMetadata,
> > > _TFs5printFTGSaP__9separatorSS10terminatorSS_T_,
> > > _TMSS,
> > > _TZvOs7Process5_argcVs5Int32,
> > > swift_bufferAllocate, ....
> > > Some of above are dllexported by the macro, but _T* are not. Maybe, it
> > > generated by swiftc.exe.
> > > I used the utility 'dlltool.exe' from Cygwin/MinGW world. It extracts
> > > all symbols and generates 'allsymbol.def'.
> > > With that .def, I could build the all-symbol-dllexported
> > > libswiftCore.dll.
> > > (I'm hoping we can build it without this trick.)
> >
> > The _T symbols are emitted by the Swift compiler. You should modify
> > swiftc's IRGen to generate public symbols with LLVM's "dllexport" storage
> > class when targeting Windows.
> >
> > https://github.com/apple/swift/pull/2080 is a first cut attempt to do this.
> >
> >
> > -Joe
> > _______________________________________________
> > swift-dev mailing list
> > swift-dev@swift.org
> > https://lists.swift.org/mailman/listinfo/swift-dev
> >
> >
> >
> > --
> > Saleem Abdulrasool
> > compnerd (at) compnerd (dot) org
> >
>
>
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