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Expand BytecodeInstructionIntegrationTest Coverage (#4242)
* Expand BytecodeInstructionIntegrationTest to improve coverage for LocalVariable, BasicInstruction, and ArithmeticExpression. This change adds comprehensive unit tests and expands the integration test app to cover: - Synchronized methods (BasicInstruction.appendSynchronized) - Complex arithmetic expressions (ArithmeticExpression optimizations and binary operations) - LocalVariable matching and code generation - Array types and basic instructions It also upgrades ASM dependency to 9.7 to support Java 21 class files during testing. * Expand BytecodeInstructionIntegrationTest to improve coverage and fix Java 21 compatibility. Expanded `BytecodeInstructionIntegrationTest` to cover `BasicInstruction`, `LocalVariable`, and `ArithmeticExpression` more thoroughly by including unit tests for specific methods and expanding the integration test app (`BytecodeInstructionApp.java`) to use synchronized methods, complex arithmetic, and primitive arrays. Upgraded `asm` dependency to 9.7 in `vm/tests/pom.xml` and updated `Parser.java` to use `Opcodes.ASM9` to support parsing Java 21 class files. Fixed test compilation on Java 9+ environments by conditionally using `--patch-module` to override `java.base` classes with test stubs, while maintaining compatibility for older Java versions. Updated `CleanTargetIntegrationTest` to include necessary runtime stubs (`monitorEnterBlock`, `monitorExitBlock`, `fmod`, array classes) and link against the math library (`-lm`) in generated CMake projects, resolving linker errors during native compilation tests. * Expand BytecodeInstructionIntegrationTest to improve coverage for LocalVariable, BasicInstruction, and ArithmeticExpression and ensure Java 21 compatibility. This change expands the integration tests to cover synchronized methods, arithmetic expressions, and primitive arrays. It updates `BytecodeInstructionIntegrationTest` to conditionally apply compiler flags for Java 9+ compatibility and ensures generated C code includes necessary runtime stubs (like `monitorEnterBlock` and `fmod`). Crucially, it updates `Parser.java` to dynamically detect the available ASM version (ASM9 or ASM5) to support both the Maven-based test environment (running on Java 21 with ASM 9.7) and the legacy Ant build system (using ASM 5.0.3). `vm/tests/pom.xml` is upgraded to use ASM 9.7 to enable parsing of Java 21 class files during tests. * Expand BytecodeInstructionIntegrationTest coverage for BasicInstruction, LocalVariable, and ArithmeticExpression Expanded BytecodeInstructionIntegrationTest to include unit tests and deeper integration tests covering: - LocalVariable: isRightVariable, getVarName, appendInstruction - BasicInstruction: getValue, isComplexInstruction, appendSynchronized, appendInstruction (AASTORE null check) - ArithmeticExpression: isOptimized, appendInstruction, addDependencies Updated BytecodeInstructionApp to exercise synchronized methods, arithmetic operations, and primitive arrays. Fixed native Segfault in generated code by refining array initialization logic and adding null checks to AASTORE in BasicInstruction. Configured integration tests to target Java 1.5 as requested (note: local verification skipped due to JDK 21 incompatibility with -source 1.5). --------- Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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‎A.java‎

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class A{}

‎test_compile/src/Foo.java‎

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public class Foo { public static void main(String[] args) {} }

‎test_compile/src/java/lang/Object.java‎

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package java.lang; public class Object {}

‎test_compile/src/java/lang/String.java‎

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package java.lang; public class String {}

‎vm/tests/src/test/java/com/codename1/tools/translator/BytecodeInstructionIntegrationTest.java‎

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‎vm/tests/src/test/java/com/codename1/tools/translator/CleanTargetIntegrationTest.java‎

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@@ -96,8 +96,19 @@ void generatesRunnableHelloWorldUsingCleanTarget() throws Exception {
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static void runTranslator(Path classesDir, Path outputDir, String appName) throws Exception {
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Path translatorResources = Paths.get("..", "ByteCodeTranslator", "src").normalize().toAbsolutePath();
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URLClassLoader systemLoader = (URLClassLoader) ClassLoader.getSystemClassLoader();
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URL[] systemUrls = systemLoader.getURLs();
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ClassLoader systemLoader = ClassLoader.getSystemClassLoader();
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URL[] systemUrls;
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if (systemLoader instanceof URLClassLoader) {
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systemUrls = ((URLClassLoader) systemLoader).getURLs();
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} else {
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// For Java 9+, we need to get the classpath from the system property
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String[] paths = System.getProperty("java.class.path").split(System.getProperty("path.separator"));
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systemUrls = new URL[paths.length];
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for (int i=0; i<paths.length; i++) {
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systemUrls[i] = Paths.get(paths[i]).toUri().toURL();
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}
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}
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URL[] urls = Arrays.copyOf(systemUrls, systemUrls.length + 1);
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urls[systemUrls.length] = translatorResources.toUri().toURL();
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URLClassLoader loader = new URLClassLoader(urls, null);
@@ -145,7 +156,7 @@ static void replaceLibraryWithExecutableTarget(Path cmakeLists, String sourceDir
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content = content.replace(globWithObjc, globCOnly);
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String replacement = content.replace(
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"add_library(${PROJECT_NAME} ${TRANSLATOR_SOURCES} ${TRANSLATOR_HEADERS})",
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"add_executable(${PROJECT_NAME} ${TRANSLATOR_SOURCES} ${TRANSLATOR_HEADERS})"
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"add_executable(${PROJECT_NAME} ${TRANSLATOR_SOURCES} ${TRANSLATOR_HEADERS})\ntarget_link_libraries(${PROJECT_NAME} m)"
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);
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Files.write(cmakeLists, replacement.getBytes(StandardCharsets.UTF_8));
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}
@@ -172,19 +183,30 @@ static void patchCn1Globals(Path srcRoot) throws IOException {
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Files.write(cn1Globals, content.getBytes(StandardCharsets.UTF_8));
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}
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if (!content.contains("#include <string.h>")) {
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content = content.replace("#include <stdlib.h>\n", "#include <stdlib.h>\n#include <string.h>\n");
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content = content.replace("#include <stdlib.h>\n", "#include <stdlib.h>\n#include <string.h>\n#include <math.h>\n#include <limits.h>\n");
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Files.write(cn1Globals, content.getBytes(StandardCharsets.UTF_8));
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}
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}
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static void writeRuntimeStubs(Path srcRoot) throws IOException {
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Path objectHeader = srcRoot.resolve("java_lang_Object.h");
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if (!Files.exists(objectHeader)) {
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String headerContent = "#ifndef __JAVA_LANG_OBJECT_H__\n" +
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"#define __JAVA_LANG_OBJECT_H__\n" +
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"#include \"cn1_globals.h\"\n" +
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"#endif\n";
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Files.write(objectHeader, headerContent.getBytes(StandardCharsets.UTF_8));
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}
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Path stubs = srcRoot.resolve("runtime_stubs.c");
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if (Files.exists(stubs)) {
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return;
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}
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String content = "#include \"cn1_globals.h\"\n" +
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"#include <stdlib.h>\n" +
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"#include <string.h>\n" +
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"#include <math.h>\n" +
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"#include <limits.h>\n" +
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"\n" +
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"static struct ThreadLocalData globalThreadData;\n" +
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"static int runtimeInitialized = 0;\n" +
@@ -245,6 +267,13 @@ static void writeRuntimeStubs(Path srcRoot) throws IOException {
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"\n" +
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"struct clazz class_array1__JAVA_INT = {0};\n" +
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"struct clazz class_array2__JAVA_INT = {0};\n" +
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"struct clazz class_array1__JAVA_BOOLEAN = {0};\n" +
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"struct clazz class_array1__JAVA_CHAR = {0};\n" +
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"struct clazz class_array1__JAVA_FLOAT = {0};\n" +
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"struct clazz class_array1__JAVA_DOUBLE = {0};\n" +
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"struct clazz class_array1__JAVA_BYTE = {0};\n" +
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"struct clazz class_array1__JAVA_SHORT = {0};\n" +
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"struct clazz class_array1__JAVA_LONG = {0};\n" +
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"\n" +
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"static JAVA_OBJECT allocArrayInternal(CODENAME_ONE_THREAD_STATE, int length, struct clazz* type, int primitiveSize, int dim) {\n" +
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" struct JavaArrayPrototype* arr = (struct JavaArrayPrototype*)calloc(1, sizeof(struct JavaArrayPrototype));\n" +
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"\n" +
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"void monitorExit(CODENAME_ONE_THREAD_STATE, JAVA_OBJECT obj) { (void)obj; }\n" +
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"\n" +
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"void monitorEnterBlock(CODENAME_ONE_THREAD_STATE, JAVA_OBJECT obj) { (void)obj; }\n" +
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"\n" +
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"void monitorExitBlock(CODENAME_ONE_THREAD_STATE, JAVA_OBJECT obj) { (void)obj; }\n" +
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"\n" +
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"struct elementStruct* pop(struct elementStruct** sp) {\n" +
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" (*sp)--;\n" +
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" return *sp;\n" +
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"}\n";
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}
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static String javaLangLongSource() {
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return "package java.lang;\n" +
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"public final class Long extends Number {\n" +
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" public static final long MIN_VALUE = 0x8000000000000000L;\n" +
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"}\n";
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}
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static String javaLangFloatSource() {
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return "package java.lang;\n" +
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"public final class Float extends Number {\n" +
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" public static final float NaN = 0.0f / 0.0f;\n" +
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"}\n";
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}
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static String javaLangDoubleSource() {
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return "package java.lang;\n" +
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"public final class Double extends Number {\n" +
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" public static final double POSITIVE_INFINITY = 1.0 / 0.0;\n" +
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" public static boolean isInfinite(double v) { return v == POSITIVE_INFINITY || v == -POSITIVE_INFINITY; }\n" +
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"}\n";
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}
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static String javaLangBooleanSource() {
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return "package java.lang;\n" +
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"public final class Boolean implements java.io.Serializable {\n" +
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"}\n";
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}
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static String javaLangNumberSource() {
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return "package java.lang;\n" +
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"public abstract class Number implements java.io.Serializable {\n" +
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"}\n";
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}
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static String javaIoSerializableSource() {
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return "package java.io;\n" +
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"public interface Serializable {\n" +
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"}\n";
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}
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static String javaUtilArrayListSource() {
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return "package java.util;\n" +
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"public class ArrayList {\n" +
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"}\n";
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}
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static String nativeHelloSource() {
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return "#include \"cn1_globals.h\"\n" +
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"#include <stdio.h>\n" +

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