Readme.md · ycsit/maple_engine

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# Maple 编译器和引擎

![输入图片说明](https://images.gitee.com/uploads/images/2020/0721/050904_9b03f7b1_5583371.png "Maple-engine.PNG")

## Linux服务器环境设置
  需要一台Linux x86_64服务器，至少16GB或以上内存，安装Ubuntu 16.04或18.04系统.
  若您的服务器只有16GB内存，需要创建8GB或以上的swap空间。

编译和链接 OpenJDK 核心库时，会占用很多内存。对于少于16GB内存的服务器，可以考虑
在其它内存较多的服务器上先构建好libcore.so, 将maple_engine/maple_build/out/这个
目录打包传到您的本地机器，展开后放到本地机器 同名目录下，再拷贝其中的文件 libcore.so
到maple_engine/maple_runtime/lib/x86_64/libcore.so，就可以本地编译和运行应用程序了。

登录服务器后，执行如下命令安装所需的软件包：

```
    sudo apt install -y build-essential clang cmake libffi-dev libelf-dev libunwind-dev \
            libssl-dev openjdk-8-jdk-headless unzip python-minimal python3
```

## Maple 构建环境设置

下载代码并设置Maple 构建环境：
```
  git clone https://gitee.com/openarkcompiler-incubator/maple_engine.git
  cd maple_engine
  source ./envsetup.sh
```
  若要执行后续命令，需先执行`source ./envsetup.sh`.

## 构建Maple 编译器和Maple引擎
```
  ./maple_build/tools/build-maple.sh
```

## 构建Java 核心库
   按照文档./maple_build/doc/build_OpenJDK8.md 中介绍的方法构建定制的OpenJDK-8.
   将文档中提到的必需的.jar 文件拷贝到./maple_build/jar/ 目录中，再执行如下命令：

```
   ./maple_build/tools/build-libcore.sh
```
  构建Java 核心库完成后，会将编译应用代码所需要的文件拷贝到maple_runtime/lib/x86_64/目录下。

## 编译和执行应用程序

以HelloWorld为例，编译和执行一个应用程序：
```
  cd ./maple_build/examples/HelloWorld
  "$MAPLE_BUILD_TOOLS"/java2asm.sh HelloWorld.java
  "$MAPLE_BUILD_TOOLS"/asm2so.sh HelloWorld.s

"$MAPLE_BUILD_TOOLS"/run-app.sh -classpath ./HelloWorld.so HelloWorld
```

## 调试应用程序
```
  "$MAPLE_BUILD_TOOLS"/run-app.sh -gdb -classpath ./HelloWorld.so HelloWorld
```

---

## Build envionment setup
  Needs a Linux x86_64 server with 16GB or more RAM and Ubuntu 16.04/18.04 installed.
  If your server has 16GB RAM, please setup 8GB or more swap space.

Execute the following command to install the packages used by the Maple build.

sudo apt install -y build-essential clang cmake libffi-dev libelf-dev libunwind-dev \
            libssl-dev openjdk-8-jdk-headless unzip python-minimal python3

## Setup Maple environment
```
  cd maple_engine
  source ./envsetup.sh
```

## Build Maple compiler and engine
```
  ./maple_build/tools/build-maple.sh
```
## Build Java core library
   Following the doc at ./maple_build/doc/build_OpenJDK8.md to build the customized OpenJDK8.
   Make sure the needed .jar files are copied into ./maple_build/jar/ directory.

```
   ./maple_build/tools/build-libcore.sh
```
## Build and run app
```
  cd ./maple_build/examples/HelloWorld
  "$MAPLE_BUILD_TOOLS"/java2asm.sh HelloWorld.java
  "$MAPLE_BUILD_TOOLS"/asm2so.sh HelloWorld.s

"$MAPLE_BUILD_TOOLS"/run-app.sh -classpath ./HelloWorld.so HelloWorld
```

## Debug app with Maple debugger
```
  "$MAPLE_BUILD_TOOLS"/run-app.sh -gdb -classpath ./HelloWorld.so HelloWorld
```

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