[cfe-dev] Running LLVMHello Pass from Clang(-cl)
Eric Astor via cfe-dev
cfe-dev at lists.llvm.org
Wed Nov 11 05:39:10 PST 2020
The "Error generating preprocessed source(s)" message here is from a
generic error trap:
https://github.com/llvm/llvm-project/blob/ba71a0746f31a2f5f9af992f569a9418133a9a38/clang/lib/Driver/Driver.cpp#L1385
I've found instances of this online that were resolved by increasing the
heap size, so it can be caused by just about anything. The underlying
command line doesn't include a smoking gun for me either.
As Andrzej mentioned, I don't know that dynamic plugins are actually
well-supported on Windows, so this might be hard to track down without the
ability to run a debugger. If you can't build with debug symbols, can you
write a step-by-step reproduction procedure so someone else can try,
including all the code necessary?
- Eric
On Wed, Nov 11, 2020 at 8:16 AM Gaier, Bjoern via cfe-dev <
cfe-dev at lists.llvm.org> wrote:
> Hey Andrzej,
>
> Sadly I can not run it under Linux and also don't have debug symbols
> enabled (because of disk space issues...)
>
> I'm really confused by this, because the plugin works with opt causing no
> issues. So.... what is opt doing differently then Clang? >o<
>
> - Björn
>
> -----Original Message-----
> From: cfe-dev <cfe-dev-bounces at lists.llvm.org> On Behalf Of Andrzej
> Warzynski via cfe-dev
> Sent: 11 November 2020 12:56
> To: cfe-dev at lists.llvm.org
> Subject: Re: [cfe-dev] Running LLVMHello Pass from Clang(-cl)
>
> Hello Gaier,
>
> This might indicate the root cause:
>
> ```
> clang-cl: note: diagnostic msg: Error generating preprocessed source(s).
> ```
>
> However, I have no better suggestion other than investigating with a
> debugger :/
>
> Btw, have you tried on Linux? Dynamically loaded plugins are not really
> supported on Windows. Yes, sometimes stuff works, but your mileage will
> vary. If you test this on Linux and it still fails then at least you will
> be confident that it's not related to Windows-specific limitations.
>
> -Andrzej
>
> On 11/11/2020 08:16, Gaier, Bjoern via cfe-dev wrote:
> > Hello Eric,
> >
> > I got this now:
> >
> > D:\Program Files\LLVM_orc_removal\bin>clang-cl.exe -v -Xclang -load
> > -Xclang LLVMHello.dll Test.cpp
> >
> > clang version 12.0.0
> >
> > Target: x86_64-pc-windows-msvc
> >
> > Thread model: posix
> >
> > InstalledDir: D:\Program Files\LLVM_orc_removal\bin
> >
> > "D:\\Program Files\\LLVM_orc_removal\\bin\\clang-cl.exe" -cc1 -triple
> > x86_64-pc-windows-msvc19.27.29111 -emit-obj -mrelax-all
> > -mincremental-linker-compatible --mrelax-relocations -disable-free
> > -main-file-name Test.cpp -mrelocation-model pic -pic-level 2
> > -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math
> > -mconstructor-aliases -munwind-tables -target-cpu x86-64 -mllvm
> > -x86-asm-syntax=intel -tune-cpu generic -D_MT
> > -flto-visibility-public-std --dependent-lib=libcmt
> > --dependent-lib=oldnames -stack-protector 2 -fms-volatile
> > -fdiagnostics-format msvc -v -resource-dir "D:\\Program
> > Files\\LLVM_orc_removal\\lib\\clang\\12.0.0" -internal-isystem
> > "D:\\Program Files\\LLVM_orc_removal\\lib\\clang\\12.0.0\\include"
> > -internal-isystem "D:\\Program Files (x86)\\Microsoft Visual
> > Studio\\2019\\Professional\\VC\\Tools\\MSVC\\14.27.29110\\include"
> > -internal-isystem "D:\\Program Files (x86)\\Microsoft Visual
> >
> Studio\\2019\\Professional\\VC\\Tools\\MSVC\\14.27.29110\\atlmfc\\include"
> > -internal-isystem "C:\\Program Files (x86)\\Windows
> > Kits\\10\\Include\\10.0.18362.0\\ucrt" -internal-isystem "C:\\Program
> > Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\shared"
> > -internal-isystem "C:
> >
> > \\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\um"
> > -internal-isystem "C:\\Program Files
> > (x86)\\WindowsKits\\10\\include\\10.0.18362.0\\winrt"
> > -fdeprecated-macro -fdebug-compilation-dir "D:\\Program
> Files\\LLVM_orc_removal\\bin"
> > -ferror-limit 19 -fmessage-length=120 -fno-use-cxa-atexit
> > -fms-extensions -fms-compatibility
> > -fms-compatibility-version=19.27.29111 -std=c++14
> > -fdelayed-template-parsing -fcolor-diagnostics -load LLVMHello.dll
> > -faddrsig -o "C:\\Users\\h16020\\AppData\\Local\\Temp\\Test-f1a523.obj"
> > -x c++ Test.cpp
> >
> > clang-cl: error: clang frontend command failed due to signal (use -v
> > to see invocation)
> >
> > clang version 12.0.0
> >
> > Target: x86_64-pc-windows-msvc
> >
> > Thread model: posix
> >
> > InstalledDir: D:\Program Files\LLVM_orc_removal\bin
> >
> > clang-cl: note: diagnostic msg: Error generating preprocessed source(s).
> >
> > And here with -Xclang
> >
> > D:\Program Files\LLVM_orc_removal\bin>clang-cl.exe -Xclang -v -Xclang
> > -load -Xclang LLVMHello.dll Test.cpp
> >
> > clang-cl: error: clang frontend command failed due to signal (use -v
> > to see invocation)
> >
> > clang version 12.0.0
> >
> > Target: x86_64-pc-windows-msvc
> >
> > Thread model: posix
> >
> > InstalledDir: D:\Program Files\LLVM_orc_removal\bin
> >
> > clang-cl: note: diagnostic msg: Error generating preprocessed source(s).
> >
> > Didn’t told me much óò
> >
> > Kind greetings
> >
> > Björn
> >
> > *From:*Eric Astor <eric.astor at gmail.com>
> > *Sent:* 10 November 2020 14:50
> > *To:* Gaier, Bjoern <Bjoern.Gaier at horiba.com>
> > *Cc:* Clang Dev <cfe-dev at lists.llvm.org>
> > *Subject:* Re: [cfe-dev] Running LLVMHello Pass from Clang(-cl)
> >
> > This line seems critical:
> >
> > clang-cl: error: clang frontend command failed due to signal (use -v
> > to see invocation)
> >
> > Have you tried rerunning with -v? The full invocation might be
> informative.
> >
> > Best,
> >
> > - Eric
> >
> > On Tue, Nov 10, 2020 at 4:13 AM Gaier, Bjoern via cfe-dev
> > <cfe-dev at lists.llvm.org <mailto:cfe-dev at lists.llvm.org>> wrote:
> >
> > Hello everyone,
> >
> > I build and run the LLVM (and clang) under Windows. I wanted to dive
> > into the LLVM passes because I see a huge benefit in them for our
> > project. So I made sure to configurate CMAKE with
> > “CLANG_PLUGIN_SUPPORT”, “LLVM_ENABLE_PLUGINS” and
> > “LLVM_EXPORT_SYMBOLS_FOR_PLUGINS”.
> >
> > Except one project, everything build fine and I was able to execute
> > “opt.exe” with the LLVMHello.dll – everything worked as expected!
> >
> > However, then I tried using the DLL with Clang-Cl because this would
> > be the way how to integrate it to our system. So I used:
> >
> > clang-cl.exe -Xclang -load -Xclang LLVMHello.dll Test.cpp
> >
> > However, this failed with:
> >
> > clang-cl: error: clang frontend command failed due to signal (use -v
> > to see invocation)
> >
> > clang version 12.0.0
> >
> > Target: x86_64-pc-windows-msvc
> >
> > Thread model: posix
> >
> > InstalledDir: D:\Program Files\LLVM_orc_removal\bin
> >
> > clang-cl: note: diagnostic msg: Error generating preprocessed
> source(s).
> >
> > If I remove the loading of LLVMHello.dll it works correctly again. I
> > feel like, that LLVMHello.dll is not finding all the symbols needed.
> > So I linked LLVMHello.dll with “clang.lib” instead of “opt.lib” -
> > but with no success.
> >
> > I also read that there are ways to include those passes directly
> > into the source code of Clang, but I hoped to use this dynamic
> > approach instead.
> >
> > Any comments, ideas or something about this?
> >
> > Kind greetings
> >
> > Björn
> >
> > Als GmbH eingetragen im Handelsregister Bad Homburg v.d.H. HRB 9816,
> > USt.ID-Nr. DE 114 165 789 Geschäftsführer: Dr. Hiroshi Nakamura, Dr.
> > Robert Plank, Markus Bode, Takashi Nagano, Junichi Tajika, Ergin
> > Cansiz.
> >
> > _______________________________________________
> > cfe-dev mailing list
> > cfe-dev at lists.llvm.org <mailto:cfe-dev at lists.llvm.org>
> > https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
> > <https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev>
> >
> > Als GmbH eingetragen im Handelsregister Bad Homburg v.d.H. HRB 9816,
> > USt.ID-Nr. DE 114 165 789 Geschäftsführer: Dr. Hiroshi Nakamura, Dr.
> > Robert Plank, Markus Bode, Takashi Nagano, Junichi Tajika, Ergin Cansiz.
> >
> > _______________________________________________
> > cfe-dev mailing list
> > cfe-dev at lists.llvm.org
> > https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
> >
> _______________________________________________
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> Als GmbH eingetragen im Handelsregister Bad Homburg v.d.H. HRB 9816,
> USt.ID-Nr. DE 114 165 789 Geschäftsführer: Dr. Hiroshi Nakamura, Dr. Robert
> Plank, Markus Bode, Takashi Nagano, Junichi Tajika, Ergin Cansiz.
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