test: add IBM Semeru Java distribution to test matrix

Semeru uses Open9J JIT, so it might behave differently from the other OpenJDK
distributions, so it is assigned a greater weight in the test matrix.

The option for testing with "same hashcode" -XX:hashCode=2 is moved
to Test task execution only since javac, and kotlinc do not behave
well with "same hashcode".

Author: Vladimir Sitnikov

Diff for: .github/workflows/gradle.yml

@@ -54,17 +54,19 @@ jobs:
         with:
           script: |
             console.log('The following command might help reproducing CI results, use Java ${{ matrix.java_version }}')
-            console.log('TZ="${{ matrix.tz }}" _JAVA_OPTIONS="${{ matrix.testExtraJvmArgs }}" ./gradlew check ${{ matrix.extraGradleArgs }}')
+            console.log('TZ="${{ matrix.tz }}" _JAVA_OPTIONS="${{ matrix.extraJvmArgs }}" ./gradlew check ${{ matrix.extraGradleArgs }} -PtestExtraJvmArgs="${{ matrix.testExtraJvmArgs }}"')
 
       - uses: burrunan/gradle-cache-action@v1
         # See https://github.com/burrunan/gradle-cache-action
         name: Build and Test
         env:
-          _JAVA_OPTIONS: ${{ matrix.testExtraJvmArgs }}
+          _JAVA_OPTIONS: ${{ matrix.extraJvmArgs }}
         with:
           # It allows different cache contents for different JDKs
           job-id: java${{ matrix.java_version }}
           arguments: check -DshowStandardStreams=true ${{ matrix.extraGradleArgs }}
+          properties: |
+            testExtraJvmArgs=${{ matrix.testExtraJvmArgs }}
 
 #      - name: Publish Test Report
 #        uses: scacap/action-surefire-report@v1

Diff for: .github/workflows/matrix.js

@@ -20,18 +20,16 @@ const matrix = new MatrixBuilder();
 matrix.addAxis({
   name: 'java_distribution',
   values: [
-    'corretto',
-    'liberica',
-    'microsoft',
-    'oracle',
-    'temurin',
-    'zulu',
+    {value: 'corretto', weight: 1},
+    {value: 'liberica', weight: 1},
+    {value: 'microsoft', weight: 1},
+    {value: 'oracle', weight: 1},
+    {value: 'semeru', weight: 4},
+    {value: 'temurin', weight: 1},
+    {value: 'zulu', weight: 1},
   ]
 });
 
-// TODO: support different JITs (see https://github.com/actions/setup-java/issues/279)
-matrix.addAxis({name: 'jit', title: '', values: ['hotspot']});
-
 // See the supported versions at https://foojay.io/almanac/java-17/
 matrix.addAxis({
   name: 'java_version',
@@ -92,12 +90,16 @@ matrix.setNamePattern([
     'tz', 'locale',
 ]);
 
+// Semeru uses OpenJ9 jit which has no option for making hash codes the same
+// See https://github.com/eclipse-openj9/openj9/issues/17309
+matrix.exclude({java_distribution: {value: 'semeru'}, hash: {value: 'same'}});
+matrix.exclude({java_distribution: {value: 'semeru'}, java_version: '19'});
 // Microsoft Java has no distribution for 8, 18, 19
-matrix.exclude({java_distribution: 'microsoft', java_version: '8'});
-matrix.exclude({java_distribution: 'microsoft', java_version: '18'});
-matrix.exclude({java_distribution: 'microsoft', java_version: '19'});
+matrix.exclude({java_distribution: {value: 'microsoft'}, java_version: '8'});
+matrix.exclude({java_distribution: {value: 'microsoft'}, java_version: '18'});
+matrix.exclude({java_distribution: {value: 'microsoft'}, java_version: '19'});
 // Oracle supports 17+ only
-matrix.exclude({java_distribution: 'oracle', java_version: ['8', '11', '19']});
+matrix.exclude({java_distribution: {value: 'oracle'}, java_version: ['8', '11', '19']});
 // TODO: remove when compileJava with "same hashcode" issues are resolved
 // See https://bugs.openjdk.org/browse/JDK-8288590 is resolved
 // See https://github.com/jqwik-team/jqwik/pull/460#issuecomment-1428261036
@@ -133,14 +135,19 @@ include.forEach(v => {
 });
 include.forEach(v => {
   let jvmArgs = [];
-
+  // Extra JVM arguments passed to test execution
+  let testJvmArgs = [];
   if (v.hash.value === 'same') {
-    jvmArgs.push('-XX:+UnlockExperimentalVMOptions', '-XX:hashCode=2');
+    // javac has issues with "same hashcode" option (see https://bugs.openjdk.org/browse/JDK-8288590)
+    // On the other hand, kotlinc uses "object identity" a lot. It works properly,
+    // but it becomes slow as HashMap degrades. So we pass "same hashcode" to test executions only.
+    testJvmArgs.push('-XX:+UnlockExperimentalVMOptions', '-XX:hashCode=2');
   }
   // Pass locale via _JAVA_OPTIONS so all the forked processes inherit it
   jvmArgs.push(`-Duser.country=${v.locale.country}`);
   jvmArgs.push(`-Duser.language=${v.locale.language}`);
-  if (v.jit === 'hotspot' && Math.random() > 0.5) {
+  v.java_distribution = v.java_distribution.value;
+  if (v.java_distribution !== 'semeru' && Math.random() > 0.5) {
     // The following options randomize instruction selection in JIT compiler
     // so it might reveal missing synchronization in TestNG code
     v.name += ', stress JIT';
@@ -164,7 +171,8 @@ include.forEach(v => {
       jvmArgs.push('-XX:+StressCCP');
     }
   }
-  v.testExtraJvmArgs = jvmArgs.join(' ');
+  v.extraJvmArgs = jvmArgs.join(' ');
+  v.testExtraJvmArgs = testJvmArgs.join(' ::: ');
   delete v.hash;
 });
 

Diff for: build.gradle

@@ -11,28 +11,3 @@ plugins {
 wrapper {
 	gradleVersion = '8.0.2'
 }
-
-allprojects {
-	tasks.withType(ProcessForkOptions).configureEach {
-		// Prevent Gradle build cache reuse for different _JAVA_OPTIONS
-		inputs.property("ENV:_JAVA_OPTIONS", providers.environmentVariable("_JAVA_OPTIONS")).optional(true)
-	}
-
-	tasks.withType(JavaCompile).configureEach {
-		// Prevent Gradle build cache reuse for different _JAVA_OPTIONS
-		inputs.property("ENV:_JAVA_OPTIONS", providers.environmentVariable("_JAVA_OPTIONS")).optional(true)
-	}
-
-	tasks.withType(Test).configureEach {
-		def language = System.getProperty("user.language") ?: "TR"
-		if (language != null) {
-			systemProperty("user.language", language)
-		}
-		def country = System.getProperty("user.country") ?: "tr"
-		if (country != null) {
-			systemProperty("user.country", country)
-		}
-		// Tests might depend on timezone, so treat it as an input
-		inputs.property("ENV:TZ", providers.environmentVariable("TZ")).optional(true)
-	}
-}

Diff for: buildSrc/src/main/groovy/jqwik.common-configuration.gradle

@@ -66,6 +66,34 @@ tasks.withType(Javadoc) {
 	options.addStringOption('Xdoclint:none', '-quiet')
 }
 
+tasks.withType(ProcessForkOptions).configureEach {
+	// Prevent Gradle build cache reuse for different _JAVA_OPTIONS
+	inputs.property("ENV:_JAVA_OPTIONS", providers.environmentVariable("_JAVA_OPTIONS")).optional(true)
+}
+
+tasks.withType(JavaCompile).configureEach {
+	// Prevent Gradle build cache reuse for different _JAVA_OPTIONS
+	inputs.property("ENV:_JAVA_OPTIONS", providers.environmentVariable("_JAVA_OPTIONS")).optional(true)
+}
+
+tasks.withType(Test).configureEach {
+	def language = System.getProperty("user.language") ?: "TR"
+	if (language != null) {
+		systemProperty("user.language", language)
+	}
+	def country = System.getProperty("user.country") ?: "tr"
+	if (country != null) {
+		systemProperty("user.country", country)
+	}
+	// Tests might depend on timezone, so treat it as an input
+	inputs.property("ENV:TZ", providers.environmentVariable("TZ")).optional(true)
+
+	def testExtraJvmArgs = project.findProperty("testExtraJvmArgs")
+	if (testExtraJvmArgs instanceof String) {
+		jvmArgs(testExtraJvmArgs.split(" ::: "))
+	}
+}
+
 // Enable to get more compiler warnings.
 //	tasks.withType(JavaCompile) {
 //		options.compilerArgs << '-Xlint:unchecked'