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67
jvm/adapter/src/main/java/com/oracle/truffle/js/lang/JavaScriptLanguageHack.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| /* | ||
| * Copyright 2011-2024 GatlingCorp (https://gatling.io) | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package com.oracle.truffle.js.lang; | ||
|
|
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| import static io.gatling.internal.asm.Opcodes.*; | ||
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|
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| import io.gatling.internal.asm.*; | ||
| import java.io.IOException; | ||
| import java.lang.invoke.MethodHandles; | ||
|
|
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| public class JavaScriptLanguageHack { | ||
| public static void allowThreadAccess() throws IOException, IllegalAccessException { | ||
| final byte[] modifiedJavaScriptLanguage; | ||
|
|
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| try (final var classInputStream = | ||
| ClassLoader.getSystemClassLoader() | ||
| .getResourceAsStream("com/oracle/truffle/js/lang/JavaScriptLanguage.class")) { | ||
| if (classInputStream == null) { | ||
| throw new IllegalStateException( | ||
| "JavaScriptLanguage class file not found: GraalJS dependency is probably missing"); | ||
| } | ||
|
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| final ClassReader classReader = new ClassReader(classInputStream); | ||
| final var classWriter = | ||
| new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS); | ||
| ClassVisitor classVisitor = new JavaScriptLanguageClassAdapter(classWriter) {}; | ||
| classReader.accept(classVisitor, 0); | ||
| modifiedJavaScriptLanguage = classWriter.toByteArray(); | ||
| } | ||
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|
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| MethodHandles.lookup().defineClass(modifiedJavaScriptLanguage); | ||
| } | ||
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| private static class JavaScriptLanguageClassAdapter extends ClassVisitor { | ||
| public JavaScriptLanguageClassAdapter(ClassVisitor cv) { | ||
| super(ASM9, cv); | ||
| } | ||
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| @Override | ||
| public void visitEnd() { | ||
| final var mv = | ||
| cv.visitMethod( | ||
| ACC_PROTECTED, "isThreadAccessAllowed", "(Ljava/lang/Thread;Z)Z", null, null); | ||
| mv.visitCode(); | ||
| mv.visitInsn(ICONST_1); | ||
| mv.visitInsn(IRETURN); | ||
| mv.visitMaxs(1, 2); | ||
| mv.visitEnd(); | ||
|
|
||
| super.visitEnd(); | ||
| } | ||
| } | ||
| } |
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95 changes: 95 additions & 0 deletions
95
jvm/adapter/src/main/java/io/gatling/js/JsSimulationHelper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| /* | ||
| * Copyright 2011-2024 GatlingCorp (https://gatling.io) | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
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| package io.gatling.js; | ||
|
|
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| import com.oracle.truffle.js.runtime.JSContextOptions; | ||
| import io.gatling.javaapi.core.PopulationBuilder; | ||
| import io.gatling.javaapi.core.Simulation; | ||
| import java.io.IOException; | ||
| import java.net.MalformedURLException; | ||
| import java.net.URL; | ||
| import java.nio.file.Paths; | ||
| import java.util.*; | ||
| import java.util.function.Consumer; | ||
| import java.util.function.Function; | ||
| import org.graalvm.polyglot.Context; | ||
| import org.graalvm.polyglot.Source; | ||
| import org.graalvm.polyglot.TypeLiteral; | ||
| import org.graalvm.polyglot.Value; | ||
|
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| public class JsSimulationHelper { | ||
| private static final String JS = "js"; | ||
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| public static void loadSimulation(Function<List<PopulationBuilder>, Simulation.SetUp> setUp) { | ||
| var simulationName = | ||
| Optional.ofNullable(System.getProperty("gatling.js.simulation")) | ||
| .orElseThrow( | ||
| () -> | ||
| new NoSuchElementException( | ||
| "System property gatling.js.simulation must be defined")); | ||
| var bundleUrl = | ||
| Optional.ofNullable(System.getProperty("gatling.js.bundle.filePath")) | ||
| .map(JsSimulationHelper::filePathToUrl) | ||
| .or( | ||
| () -> | ||
| Optional.ofNullable(System.getProperty("gatling.js.bundle.resourcePath")) | ||
| .map(JsSimulationHelper::resourcePathToUrl)) | ||
| .orElseThrow( | ||
| () -> | ||
| new NoSuchElementException( | ||
| "One of the system properties gatling.js.bundle.filePath or gatling.js.bundle.resourcePath must be defined")); | ||
|
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| // Context is never closed because it will live for the entire duration of the process | ||
| var context = | ||
| Context.newBuilder(JS) | ||
| .allowAllAccess(true) | ||
| .option(JSContextOptions.STRICT_NAME, "true") | ||
| .build(); | ||
|
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| try { | ||
| context.eval(Source.newBuilder(JS, bundleUrl).mimeType("application/javascript").build()); | ||
| } catch (IOException e) { | ||
| throw new IllegalStateException("Cannot load Javascript bundle file at " + bundleUrl, e); | ||
| } | ||
| Value jsIifeWrapper = context.getBindings(JS).getMember("gatling"); | ||
| Value jsSimulationValue = jsIifeWrapper.getMember(simulationName); | ||
| if (jsSimulationValue == null) { | ||
| throw new NoSuchElementException( | ||
| "Simulation '" + simulationName + "' was not found in the JavaScript bundle"); | ||
| } | ||
|
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| jsSimulationValue | ||
| .as(new TypeLiteral<Consumer<Function<List<PopulationBuilder>, Simulation.SetUp>>>() {}) | ||
| .accept(setUp); | ||
| } | ||
|
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| private static URL filePathToUrl(String filePath) { | ||
| try { | ||
| return Paths.get(filePath).toUri().toURL(); | ||
| } catch (MalformedURLException e) { | ||
| throw new IllegalArgumentException("Not a valid file path: " + filePath, e); | ||
| } | ||
| } | ||
|
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| private static URL resourcePathToUrl(String resourcePath) { | ||
| var url = JsSimulationHelper.class.getClassLoader().getResource(resourcePath); | ||
| if (url == null) { | ||
| throw new IllegalArgumentException("Not a valid resource path: " + resourcePath); | ||
| } | ||
| return url; | ||
| } | ||
| } |
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