title: CbCによるMoarVMの改良
author: Takahiro Shimizu
profile:
lang: Japanese


# 研究内容
- Perl5の後継言語として開発されているPerl6はMoarVMと呼ばれるVMを搭載している．
- Perl6はMoarVM,JVM上で動くRakudoと呼ばれる実装と，コンパイラ開発者用のサブセットであるNQPが主な実装となっている．
- 現在Perl6及びMoarVMは全体的な速度がPerl5と比較し低下しており，実務として利用できるレベルに達していない．
- またPerl6の実装自体巨大なcase-switch文など見通しが悪くなっている．
- 本研究では継続を中心に開発されたContinuation based Cを用いてMoarVMの改良を検討する．

# 今週の進捗

- dalmoreでCbCgccでMoarVM/NQPが動きました

# MoarVMのclone

- MoarVMをgithubからcloneする

```
$ git clone https://github.com/MoarVM/MoarVM.git
```

# MoarVMのmake

- Perlの`Configure.pl`を叩いてMakefileを生成する
    - 別のディレクトリからは叩け無い仕様に成っていた

```
./Configure.pl --cc /usr/local/x86-cbc/bin/gcc --debug --compiler gcc --prefix=/mnt/dalmore-home/one/src/build_perl6/MoarVM`
```

- オプション
- cc
    - コンパイラのパスを設定する
- debug
    - debugオプション
- compiler
    - コンパイラの種類を指定する
    - gcc, clang, clをサポートしている
-  toolchain <toolchain>
    - "posix", "gnu", "bsd" and "msvc"のツールチェインを選択可能
- prefix
    - make installの先を指定

# llvmでの実行

```
(dalmore) ./Configure.pl --cc /usr/local/cbclang/bin/clang
```

- セグフォで死ぬ

```
0.      Program arguments: /net/open/CentOS/local/cbclang/bin/clang-7.0 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-f
ile-name io.c -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse
-init-array -target-cpu x86-64 -dwarf-column-info -debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -momit-leaf-frame-pointer -c
overage-notes-file /mnt/dalmore-home/one/src/MoarVM/src/platform/posix/io.gcno -resource-dir /net/open/CentOS/local/cbclang/lib/clang/7.0.0 -
D NDEBUG -D _REENTRANT -D _FILE_OFFSET_BITS=64 -D DEBUG_HELPERS -D MVM_TRACING=0 -D MVM_CGOTO=1 -D MVM_RDTSCP=1 -D MVM_BUILD_SHARED -I 3rdpar
ty/libuv/include -I 3rdparty/libuv/src -I 3rdparty/libatomicops/src -I 3rdparty/libtommath -I 3rdparty/dyncall/dynload -I 3rdparty/dyncall/dy
ncall -I 3rdparty/dyncall/dyncallback -I 3rdparty/sha1 -I 3rdparty/tinymt -I 3rdparty/dynasm -I 3rdparty/cmp -I 3rdparty -I src -internal-isy
stem /usr/local/include -internal-isystem /net/open/CentOS/local/cbclang/lib/clang/7.0.0/include -internal-externc-isystem /include -internal
-externc-isystem /usr/include -O3 -Werror=declaration-after-statement -Werror=pointer-arith -fdebug-compilation-dir /mnt/dalmore-home/one/src
/MoarVM -ferror-limit 19 -fmessage-length 136 -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-sl
p -o src/platform/posix/io.o -x c src/platform/posix/io.c
1.      <eof> parser at end of file
clang-7.0: error: unable to execute command: Segmentation fault
clang-7.0: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 7.0.0
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/cbclang/bin
clang-7.0: note: diagnostic msg: PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, a
nd associated run script.
clang-7.0: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-7.0: note: diagnostic msg: /tmp/io-e696e2.c
clang-7.0: note: diagnostic msg: /tmp/io-e696e2.sh
clang-7.0: note: diagnostic msg:

********************
```

# make

```
$ make -j 50 && make install
```

- 何故かsrc側にもmoarのバイナリが生成された
- `/mnt/dalmore-home/one/src/build_perl6/MoarVM/bin`にMoarのバイナリが生成


# NQPのmake


```
+dalmore+one ./Configure.pl --prefix=/mnt/dalmore-home/one/src/build_perl6/nqp --backends=moar --with-moar=/mnt/dalmore-home/one/src/build_perl6/MoarVM/bin/moar
```

- オプション
- `prefix` 
    - ビルド先
- `backends`
    - NQPが走るVMを選択する
- `--with-moar`
    - MoarVMを使う場合MoarVMのパス

# バージョン

```
Creating tools/build/install-jvm-runner.pl ...

===SORRY!===
Found /mnt/dalmore-home/one/src/build_perl6/MoarVM/bin/moar version 2018.04-1-g577857a, which is too old. Wanted at least 2018.04-18-ge7d79d8
69

No suitable MoarVM (moar executable) found using the --prefix
(You can get a MoarVM built automatically with --gen-moar.)
```

- MoarVMとバージョンが異なるらしくエラーが発生した

```
/mnt/dalmore-home/one/src/build_perl6/MoarVM/bin/moar --libpath=src/vm/moar/stage0 src/vm/moar/stage0/nqp.moarvm --bootstrap --module-path=ge
n/moar/stage1 --setting-path=gen/moar/stage1 \
    --setting=NQPCORE --no-regex-lib --target=mbc \
    --output=gen/moar/stage1/NQPP6QRegex.moarvm gen/moar/stage1/NQPP6QRegex.nqp
/usr/bin/perl -MExtUtils::Command -e mkpath gen/moar/stage1/gen
/usr/bin/perl tools/build/gen-version.pl /mnt/dalmore-home/one/src/build_perl6/nqp /mnt/dalmore-home/one/src/build_perl6/nqp/share/nqp/lib >
gen/moar/stage1/nqp-config.nqp
Can't locate Digest/SHA.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl
5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at tools/build/gen-version.pl line 9.
BEGIN failed--compilation aborted at tools/build/gen-version.pl line 9.
make: *** [gen/moar/stage1/nqp.moarvm] Error 2
```

- バージョンを更新したところ`Digest::SHA`が入っていないエラーが発生した

# Perlモジュールの追加

- 最近のPerlのモジュールinstallツールのcpanmをoneにいれました
- `yum install perl-devel`を実行してperlのコアモジュールを追加した
- `curl -L https://cpanmin.us | perl - --sudo App::cpanminus `
- `cpanm --force Digest::SHA`


# MacOSX上でのgccのエラー

```
$./Configure.pl --prefix=/Users/anatofuz/workspace/cr/Basic/build_perl6 --cc /Users/anatofuz/workspace/cr/build_gcc/bin/gcc --compiler gcc
```

これを実行すると

```
compiling 3rdparty/libuv/src/unix/darwin-proctitle.o
compiling 3rdparty/libuv/src/unix/fsevents.o
In file included from /System/Library/Frameworks/Security.framework/Headers/AuthSession.h:32:0,
                 from /System/Library/Frameworks/Security.framework/Headers/Security.h:43,
                 from /System/Library/Frameworks/CoreServices.framework/Frameworks/OSServices.framework/Headers/CSIdentity.h:43,
                 from /System/Library/Frameworks/CoreServices.framework/Frameworks/OSServices.framework/Headers/OSServices.h:27,
                 from /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Headers/IconsCore.h:23,
                 from /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Headers/LaunchServices.h:22,
                 from /System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:39,
                 from /System/Library/Frameworks/ApplicationServices.framework/Headers/ApplicationServices.h:23,
                 from 3rdparty/libuv/src/unix/darwin-proctitle.c:33:
/System/Library/Frameworks/Security.framework/Headers/Authorization.h:193:7: error: variably modified 'bytes' at file scope
  char bytes[kAuthorizationExternalFormLength];
       ^~~~~
In file included from /System/Library/Frameworks/Security.framework/Headers/AuthSession.h:32:0,
                 from /System/Library/Frameworks/Security.framework/Headers/Security.h:43,
                 from /System/Library/Frameworks/CoreServices.framework/Frameworks/OSServices.framework/Headers/CSIdentity.h:43,
                 from /System/Library/Frameworks/CoreServices.framework/Frameworks/OSServices.framework/Headers/OSServices.h:27,
                 from /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Headers/IconsCore.h:23,
                 from /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Headers/LaunchServices.h:22,
                 from /System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:39,
                 from 3rdparty/libuv/src/unix/fsevents.c:49:
/System/Library/Frameworks/Security.framework/Headers/Authorization.h:193:7: error: variably modified 'bytes' at file scope
  char bytes[kAuthorizationExternalFormLength];
       ^~~~~
make: *** [3rdparty/libuv/src/unix/fsevents.o] Error 1
make: *** Waiting for unfinished jobs....
In file included from /System/Library/Frameworks/CoreGraphics.framework/Headers/CGContext.h:18:0,
                 from /System/Library/Frameworks/CoreGraphics.framework/Headers/CGBitmapContext.h:9,
                 from /System/Library/Frameworks/CoreGraphics.framework/Headers/CoreGraphics.h:11,
                 from /System/Library/Frameworks/ApplicationServices.framework/Headers/ApplicationServices.h:35,
                 from 3rdparty/libuv/src/unix/darwin-proctitle.c:33:
/System/Library/Frameworks/CoreGraphics.framework/Headers/CGFont.h:53:40: error: initializer element is not constant
 static const CGFontIndex kCGGlyphMax = kCGFontIndexMax;
                                        ^~~~~~~~~~~~~~~
In file included from /System/Library/Frameworks/CoreGraphics.framework/Headers/CGContext.h:21:0,
                 from /System/Library/Frameworks/CoreGraphics.framework/Headers/CGBitmapContext.h:9,
                 from /System/Library/Frameworks/CoreGraphics.framework/Headers/CoreGraphics.h:11,
                 from /System/Library/Frameworks/ApplicationServices.framework/Headers/ApplicationServices.h:35,
                 from 3rdparty/libuv/src/unix/darwin-proctitle.c:33:
/System/Library/Frameworks/CoreGraphics.framework/Headers/CGPath.h:391:15: error: expected identifier or '(' before '^' token
 typedef void (^CGPathApplyBlock)(const CGPathElement * element);
               ^
/System/Library/Frameworks/CoreGraphics.framework/Headers/CGPath.h:393:53: error: unknown type name 'CGPathApplyBlock'
 CG_EXTERN void CGPathApplyWithBlock(CGPathRef path, CGPathApplyBlock CF_NOESCAPE block)
                                                     ^~~~~~~~~~~~~~~~
make: *** [3rdparty/libuv/src/unix/darwin-proctitle.o] Error 1
```


とフレームワークのコンパイルエラーが発生する．
これはbrew経由で入れたgcc-7でも発生した