Support execution of programs for JVM compilers (#2745)

* Bare execution for Java programs
* Support execution for Kotlin

etc/config/java.amazon.properties

@@ -15,34 +15,40 @@ group.java11.compilers=java1102
 group.java11.groupName=OpenJDK 11
 group.java11.objdumper=/opt/compiler-explorer/jdk-11.0.2/bin/javap
 compiler.java1102.exe=/opt/compiler-explorer/jdk-11.0.2/bin/javac
+compiler.java1102.runtime=/opt/compiler-explorer/jdk-11.0.2/bin/java
 compiler.java1102.semver=11.0.2
 
 group.java12.compilers=java1201
 group.java12.groupName=OpenJDK 12
 group.java12.objdumper=/opt/compiler-explorer/jdk-12.0.1/bin/javap
 compiler.java1201.exe=/opt/compiler-explorer/jdk-12.0.1/bin/javac
+compiler.java1201.runtime=/opt/compiler-explorer/jdk-12.0.1/bin/java
 compiler.java1201.semver=12.0.1
 
 group.java13.compilers=java1302
 group.java13.groupName=OpenJDK 13
 group.java13.objdumper=/opt/compiler-explorer/jdk-13.0.2/bin/javap
 compiler.java1302.exe=/opt/compiler-explorer/jdk-13.0.2/bin/javac
+compiler.java1302.runtime=/opt/compiler-explorer/jdk-13.0.2/bin/java
 compiler.java1302.semver=13.0.2
 
 group.java14.compilers=java1402
 group.java14.groupName=OpenJDK 14
 group.java14.objdumper=/opt/compiler-explorer/jdk-14.0.2/bin/javap
 compiler.java1402.exe=/opt/compiler-explorer/jdk-14.0.2/bin/javac
+compiler.java1402.runtime=/opt/compiler-explorer/jdk-14.0.2/bin/java
 compiler.java1402.semver=14.0.2
 
 group.java15.compilers=java1502
 group.java15.groupName=OpenJDK 15
 group.java15.objdumper=/opt/compiler-explorer/jdk-15.0.2/bin/javap
 compiler.java1502.exe=/opt/compiler-explorer/jdk-15.0.2/bin/javac
+compiler.java1502.runtime=/opt/compiler-explorer/jdk-15.0.2/bin/java
 compiler.java1502.semver=15.0.2
 
 group.java16.compilers=java1601
 group.java16.groupName=OpenJDK 16
 group.java16.objdumper=/opt/compiler-explorer/jdk-16.0.1/bin/javap
 compiler.java1601.exe=/opt/compiler-explorer/jdk-16.0.1/bin/javac
+compiler.java1601.runtime=/opt/compiler-explorer/jdk-16.0.1/bin/java
 compiler.java1601.semver=16.0.1

etc/config/java.defaults.properties

@@ -7,6 +7,7 @@ instructionSet=java
 
 group.java.compilers=javacdefault
 compiler.javacdefault.exe=/usr/bin/javac
+compiler.javacdefault.runtime=/usr/bin/java
 compiler.javacdefault.name=javac default
 
 defaultCompiler=javacdefault
@@ -15,4 +16,5 @@ postProcess=
 options=
 supportsBinary=false
 needsMulti=false
-supportsExecute=false
+supportsExecute=true
+interpreted=true

etc/config/kotlin.amazon.properties

@@ -9,7 +9,8 @@ postProcess=
 options=
 supportsBinary=false
 needsMulti=false
-supportsExecute=false
+supportsExecute=true
+interpreted=true
 
 group.kotlin.compilers=kotlinc1400:kotlinc1410:kotlinc1420:kotlinc1421:kotlinc1430:kotlinc1431:kotlinc1432:kotlinc1500:kotlinc1510:kotlinc1520
 group.kotlin.groupName=Kotlin
@@ -18,30 +19,40 @@ group.kotlin.isSemVer=true
 compiler.kotlinc1400.exe=/opt/compiler-explorer/kotlin-jvm-1.4.0/bin/kotlinc-jvm
 compiler.kotlinc1400.semver=1.4.0
 compiler.kotlinc1400.java_home=/opt/compiler-explorer/jdk-15.0.2
+compiler.kotlinc1400.runtime=/opt/compiler-explorer/jdk-15.0.2/bin/java
 compiler.kotlinc1410.exe=/opt/compiler-explorer/kotlin-jvm-1.4.10/bin/kotlinc-jvm
 compiler.kotlinc1410.semver=1.4.10
 compiler.kotlinc1410.java_home=/opt/compiler-explorer/jdk-15.0.2
+compiler.kotlinc1410.runtime=/opt/compiler-explorer/jdk-15.0.2/bin/java
 compiler.kotlinc1420.exe=/opt/compiler-explorer/kotlin-jvm-1.4.20/bin/kotlinc-jvm
 compiler.kotlinc1420.semver=1.4.20
 compiler.kotlinc1420.java_home=/opt/compiler-explorer/jdk-15.0.2
+compiler.kotlinc1420.runtime=/opt/compiler-explorer/jdk-15.0.2/bin/java
 compiler.kotlinc1421.exe=/opt/compiler-explorer/kotlin-jvm-1.4.21/bin/kotlinc-jvm
 compiler.kotlinc1421.semver=1.4.21
 compiler.kotlinc1421.java_home=/opt/compiler-explorer/jdk-15.0.2
+compiler.kotlinc1421.runtime=/opt/compiler-explorer/jdk-15.0.2/bin/java
 compiler.kotlinc1430.exe=/opt/compiler-explorer/kotlin-jvm-1.4.30/bin/kotlinc-jvm
 compiler.kotlinc1430.semver=1.4.30
 compiler.kotlinc1430.java_home=/opt/compiler-explorer/jdk-15.0.2
+compiler.kotlinc1430.runtime=/opt/compiler-explorer/jdk-15.0.2/bin/java
 compiler.kotlinc1431.exe=/opt/compiler-explorer/kotlin-jvm-1.4.31/bin/kotlinc-jvm
 compiler.kotlinc1431.semver=1.4.31
 compiler.kotlinc1431.java_home=/opt/compiler-explorer/jdk-15.0.2
+compiler.kotlinc1431.runtime=/opt/compiler-explorer/jdk-15.0.2/bin/java
 compiler.kotlinc1432.exe=/opt/compiler-explorer/kotlin-jvm-1.4.32/bin/kotlinc-jvm
 compiler.kotlinc1432.semver=1.4.32
 compiler.kotlinc1432.java_home=/opt/compiler-explorer/jdk-15.0.2
+compiler.kotlinc1432.runtime=/opt/compiler-explorer/jdk-15.0.2/bin/java
 compiler.kotlinc1500.exe=/opt/compiler-explorer/kotlin-jvm-1.5.0/bin/kotlinc-jvm
 compiler.kotlinc1500.semver=1.5.0
 compiler.kotlinc1500.java_home=/opt/compiler-explorer/jdk-16.0.1
+compiler.kotlinc1500.runtime=/opt/compiler-explorer/jdk-16.0.1/bin/java
 compiler.kotlinc1510.exe=/opt/compiler-explorer/kotlin-jvm-1.5.10/bin/kotlinc-jvm
 compiler.kotlinc1510.semver=1.5.10
 compiler.kotlinc1510.java_home=/opt/compiler-explorer/jdk-16.0.1
+compiler.kotlinc1510.runtime=/opt/compiler-explorer/jdk-16.0.1/bin/java
 compiler.kotlinc1520.exe=/opt/compiler-explorer/kotlin-jvm-1.5.20/bin/kotlinc-jvm
 compiler.kotlinc1520.semver=1.5.20
 compiler.kotlinc1520.java_home=/opt/compiler-explorer/jdk-16.0.1
+compiler.kotlinc1520.runtime=/opt/compiler-explorer/jdk-16.0.1/bin/java

etc/config/kotlin.defaults.properties

@@ -8,6 +8,7 @@ instructionSet=java
 group.kotlin.compilers=kotlincdefault
 compiler.kotlincdefault.exe=/usr/bin/kotlinc-jvm
 compiler.kotlincdefault.name=kotlinc default
+compiler.kotlincdefault.runtime=/usr/bin/java
 
 defaultCompiler=kotlincdefault
 demangler=
@@ -15,4 +16,5 @@ postProcess=
 options=
 supportsBinary=false
 needsMulti=false
-supportsExecute=false
+supportsExecute=true
+interpreted=true

etc/nsjail/sandbox.cfg

@@ -28,7 +28,7 @@ cgroup_net_cls_parent: "ce-sandbox"
 cgroup_cpu_parent: "ce-sandbox"
 
 cgroup_mem_max: 209715200 # 200 MiB
-cgroup_pids_max: 4
+cgroup_pids_max: 14
 cgroup_cpu_ms_per_sec: 500
 
 mount {

lib/compilers/java.js

@@ -42,8 +42,8 @@ export class JavaCompiler extends BaseCompiler {
         if (!compilerInfo.disabledFilters) {
             compilerInfo.disabledFilters = ['labels', 'directives', 'commentOnly', 'trim'];
         }
-
         super(compilerInfo, env);
+        this.javaRuntime = this.compilerProps(`compiler.${this.compiler.id}.runtime`);
     }
 
     getSharedLibraryPathsAsArguments() {
@@ -103,6 +103,29 @@ export class JavaCompiler extends BaseCompiler {
         ];
     }
 
+    async handleInterpreting(key, executeParameters) {
+        executeParameters.args = [
+            '-Xss136K', // Reduce thread stack size
+            '-XX:CICompilerCount=2', // Reduce JIT compilation threads. 2 is minimum
+            '-XX:-UseDynamicNumberOfCompilerThreads',
+            '-XX:-UseDynamicNumberOfGCThreads',
+            '-XX:+UseSerialGC', // Disable parallell/concurrent garbage collector
+            this.getMainClassName(),
+            ...executeParameters.args,
+        ];
+        const buildResult = await this.getOrBuildExecutable(key);
+        const dirPath = path.dirname(buildResult.executableFilename);
+        const result = await this.runExecutable(this.javaRuntime, executeParameters, dirPath);
+        result.didExecute = true;
+        result.buildResult = buildResult;
+        return result;
+    }
+
+    getMainClassName() {
+        // TODO(supergrecko): The main class name is currently hardcoded
+        return 'Main';
+    }
+
     getArgumentParser() {
         return JavaParser;
     }

lib/compilers/kotlin.js

@@ -40,6 +40,10 @@ export class KotlinCompiler extends JavaCompiler {
         return execOptions;
     }
 
+    getMainClassName() {
+        return 'ExampleKt';
+    }
+
     filterUserOptions(userOptions) {
         // filter options without extra arguments
         userOptions = userOptions.filter(option =>