Java Code Examples for org.objectweb.asm.MethodVisitor#visitMethodInsn()
The following examples show how to use
org.objectweb.asm.MethodVisitor#visitMethodInsn() .
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Example 1
| Source File: AdviceGenerator.java From glowroot with Apache License 2.0 | 6 votes |
|
private void addOnThrowMethod(ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "onThrow",
"(Ljava/lang/Throwable;Lorg/glowroot/agent/plugin/api/TraceEntry;)V", null, null);
visitAnnotation(mv, "Lorg/glowroot/agent/plugin/api/weaving/OnThrow;");
checkNotNull(mv.visitParameterAnnotation(0,
"Lorg/glowroot/agent/plugin/api/weaving/BindThrowable;", true)).visitEnd();
checkNotNull(mv.visitParameterAnnotation(1,
"Lorg/glowroot/agent/plugin/api/weaving/BindTraveler;", true)).visitEnd();
mv.visitCode();
if (!config.traceEntryEnabledProperty().isEmpty()) {
mv.visitVarInsn(ALOAD, 1);
Label l0 = new Label();
mv.visitJumpInsn(IFNONNULL, l0);
mv.visitInsn(RETURN);
mv.visitLabel(l0);
}
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/TraceEntry",
"endWithError", "(Ljava/lang/Throwable;)V", true);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
Example 2
| Source File: BytecodeGenerator.java From slab with MIT License | 6 votes |
|
private void declareConstructor(CheckClassAdapter writer) {
MethodVisitor method = writer.visitMethod(ACC_PUBLIC, "<init>", GENERATED_CONSTRUCTOR, null, null);
method.visitCode();
method.visitVarInsn(ALOAD, 0);
method.visitVarInsn(ILOAD, 1);
method.visitLdcInsn(inspector.getSizeInBytes());
method.visitVarInsn(ALOAD, 2);
method.visitVarInsn(ALOAD, 3);
method.visitMethodInsn(INVOKESPECIAL,
classExtended,
"<init>",
constructorExtended);
method.visitInsn(RETURN);
method.visitMaxs(5, 5);
method.visitEnd();
}
Example 3
| Source File: GeneratorUtils.java From GriefDefender with MIT License | 6 votes |
|
/**
* Insert the necessary methods to box a primitive type (if the given type
* is a primitive object).
*
* @param mv The method visitor
* @param type The type to unbox
*/
public static void visitBoxingMethod(MethodVisitor mv, Type type) {
if (type.getSort() == Type.BOOLEAN) {
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;", false);
} else if (type.getSort() == Type.INT) {
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;", false);
} else if (type.getSort() == Type.BYTE) {
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;", false);
} else if (type.getSort() == Type.SHORT) {
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;", false);
} else if (type.getSort() == Type.LONG) {
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;", false);
} else if (type.getSort() == Type.FLOAT) {
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;", false);
} else if (type.getSort() == Type.DOUBLE) {
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;", false);
} else if (type.getSort() == Type.CHAR) {
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;", false);
}
}
Example 4
| Source File: RobustAsmUtils.java From Robust with Apache License 2.0 | 5 votes |
|
private static void createBooleanObj(MethodVisitor mv, int argsPostion) {
mv.visitTypeInsn(Opcodes.NEW, "java/lang/Byte");
mv.visitInsn(Opcodes.DUP);
mv.visitVarInsn(Opcodes.ILOAD, argsPostion);
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Byte", "<init>", "(B)V");
mv.visitInsn(Opcodes.AASTORE);
}
Example 5
| Source File: StringTests.java From Despector with MIT License | 5 votes |
|
@Test
public void testSimpleStringTemplate() {
TestMethodBuilder builder = new TestMethodBuilder("main", "()V");
MethodVisitor mv = builder.getGenerator();
Label start = new Label();
mv.visitLabel(start);
Label end = new Label();
mv.visitInsn(ICONST_5);
mv.visitVarInsn(ISTORE, 1);
mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "()V", false);
mv.visitLdcInsn("a is ");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
mv.visitVarInsn(ILOAD, 1);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;", false);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false);
mv.visitVarInsn(ASTORE, 2);
mv.visitLabel(end);
mv.visitInsn(RETURN);
mv.visitLocalVariable("a", "I", null, start, end, 1);
mv.visitLocalVariable("s", "Ljava/lang/String;", null, start, end, 2);
String insn = KotlinTestHelper.getMethodAsString(builder.finish(), "main");
String good = "fun main() {\n"
+ " val a: Int = 5\n"
+ " val s: String = \"a is $a\"\n"
+ "}";
Assert.assertEquals(good, insn);
}
Example 6
| Source File: DoWhileTests.java From Despector with MIT License | 5 votes |
|
@Test
public void testDoWhileBreak() {
TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(IZ)V");
MethodVisitor mv = builder.getGenerator();
Label start = new Label();
mv.visitLabel(start);
Label end = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitLabel(l1);
mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
mv.visitVarInsn(ILOAD, 1);
mv.visitJumpInsn(IFEQ, l2);
mv.visitJumpInsn(GOTO, end);
mv.visitLabel(l2);
mv.visitVarInsn(ILOAD, 0);
mv.visitInsn(ICONST_5);
mv.visitJumpInsn(IF_ICMPLT, l1);
mv.visitLabel(end);
mv.visitInsn(RETURN);
mv.visitLocalVariable("i", "I", null, start, end, 0);
mv.visitLocalVariable("a", "Z", null, start, end, 1);
String insn = TestHelper.getAsString(builder.finish(), "test_mth");
String good = "do {\n"
+ " org.spongepowered.test.decompile.DoWhileTests.body();\n"
+ " if (a) {\n"
+ " break;\n"
+ " }\n"
+ "} while (i < 5);";
Assert.assertEquals(good, insn);
}
Example 7
| Source File: ExpressionHandler.java From yql-plus with Apache License 2.0 | 5 votes |
|
@Override
public BytecodeExpression list(Location loc, final List<BytecodeExpression> args) {
List<TypeWidget> types = Lists.newArrayList();
for (BytecodeExpression e : args) {
types.add(e.getType());
}
final TypeWidget unified = unify(types).boxed();
final ListTypeWidget out = new ListTypeWidget(NotNullableTypeWidget.create(unified));
return new BaseTypeExpression(out) {
@Override
public void generate(CodeEmitter code) {
MethodVisitor mv = code.getMethodVisitor();
code.exec(out.construct(constant(args.size())));
for (BytecodeExpression expr : args) {
Label skip = new Label();
mv.visitInsn(Opcodes.DUP);
code.exec(expr);
final TypeWidget type = expr.getType();
boolean nullable = code.cast(unified, type, skip);
mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Collection.class), "add", Type.getMethodDescriptor(Type.BOOLEAN_TYPE, Type.getType(Object.class)), true);
if (nullable) {
// we're either going to POP the DUPed List OR the result of add
mv.visitLabel(skip);
}
mv.visitInsn(Opcodes.POP);
}
}
};
}
Example 8
| Source File: StaticTypesCallSiteWriter.java From groovy with Apache License 2.0 | 5 votes |
|
private void writeOperatorCall(final Expression receiver, final Expression arguments, final String operator) {
prepareSiteAndReceiver(receiver, operator, false, controller.getCompileStack().isLHS());
controller.getOperandStack().doGroovyCast(Number_TYPE);
visitBoxedArgument(arguments);
controller.getOperandStack().doGroovyCast(Number_TYPE);
MethodVisitor mv = controller.getMethodVisitor();
mv.visitMethodInsn(INVOKESTATIC, "org/codehaus/groovy/runtime/typehandling/NumberMath", operator, "(Ljava/lang/Number;Ljava/lang/Number;)Ljava/lang/Number;", false);
controller.getOperandStack().replace(Number_TYPE, 2);
}
Example 9
| Source File: ASMUtil.java From json-smart-v2 with Apache License 2.0 | 4 votes |
|
/**
* Append the call of proper extract primitive type of an boxed object. this
* methode use Number interface to unbox object
*/
protected static void autoUnBoxing2(MethodVisitor mv, Type fieldType) {
switch (fieldType.getSort()) {
case Type.BOOLEAN:
mv.visitTypeInsn(CHECKCAST, "java/lang/Boolean");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Boolean", "booleanValue", "()Z");
break;
case Type.BYTE:
mv.visitTypeInsn(CHECKCAST, "java/lang/Number");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Number", "byteValue", "()B");
break;
case Type.CHAR:
mv.visitTypeInsn(CHECKCAST, "java/lang/Character");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Character", "charValue", "()C");
break;
case Type.SHORT:
mv.visitTypeInsn(CHECKCAST, "java/lang/Number");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Number", "shortValue", "()S");
break;
case Type.INT:
mv.visitTypeInsn(CHECKCAST, "java/lang/Number");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Number", "intValue", "()I");
break;
case Type.FLOAT:
mv.visitTypeInsn(CHECKCAST, "java/lang/Number");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Number", "floatValue", "()F");
break;
case Type.LONG:
mv.visitTypeInsn(CHECKCAST, "java/lang/Number");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Number", "longValue", "()J");
break;
case Type.DOUBLE:
mv.visitTypeInsn(CHECKCAST, "java/lang/Number");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Number", "doubleValue", "()D");
break;
case Type.ARRAY:
mv.visitTypeInsn(CHECKCAST, fieldType.getInternalName());
break;
default:
mv.visitTypeInsn(CHECKCAST, fieldType.getInternalName());
}
}
Example 10
| Source File: AsmUtil.java From quarkus with Apache License 2.0 | 4 votes |
|
private static void unbox(MethodVisitor mv, String owner, String methodName, String returnTypeSignature) {
mv.visitTypeInsn(Opcodes.CHECKCAST, owner);
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, owner, methodName, "()" + returnTypeSignature, false);
}
Example 11
| Source File: TestEnumForJavacDump.java From AVM with MIT License | 4 votes |
|
public static byte[] generateBytecode() {
ClassWriter classWriter = new ClassWriter(0);
FieldVisitor fieldVisitor;
MethodVisitor methodVisitor;
classWriter.visit(V10, ACC_PUBLIC | ACC_FINAL | ACC_SUPER | ACC_ENUM, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "Ljava/lang/Enum<L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;>;", "java/lang/Enum", null);
{
fieldVisitor = classWriter.visitField(ACC_PUBLIC | ACC_FINAL | ACC_STATIC | ACC_ENUM, "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
fieldVisitor.visitEnd();
}
{
fieldVisitor = classWriter.visitField(ACC_PRIVATE | ACC_FINAL | ACC_STATIC | ACC_SYNTHETIC, "$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
fieldVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, "values", "()[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
methodVisitor.visitCode();
methodVisitor.visitFieldInsn(GETSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", "clone", "()Ljava/lang/Object;", false);
methodVisitor.visitTypeInsn(CHECKCAST, "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
methodVisitor.visitInsn(ARETURN);
methodVisitor.visitMaxs(1, 0);
methodVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, "valueOf", "(Ljava/lang/String;)L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
methodVisitor.visitCode();
methodVisitor.visitLdcInsn(Type.getType("L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;"));
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitMethodInsn(INVOKESTATIC, "java/lang/Enum", "valueOf", "(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Enum;", false);
methodVisitor.visitTypeInsn(CHECKCAST, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
methodVisitor.visitInsn(ARETURN);
methodVisitor.visitMaxs(2, 1);
methodVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_PRIVATE, "<init>", "(Ljava/lang/String;I)V", "()V", null);
methodVisitor.visitCode();
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitVarInsn(ALOAD, 1);
methodVisitor.visitVarInsn(ILOAD, 2);
methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Enum", "<init>", "(Ljava/lang/String;I)V", false);
methodVisitor.visitInsn(RETURN);
methodVisitor.visitMaxs(3, 3);
methodVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
methodVisitor.visitCode();
methodVisitor.visitTypeInsn(NEW, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
methodVisitor.visitInsn(DUP);
methodVisitor.visitLdcInsn("TEST");
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitMethodInsn(INVOKESPECIAL, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "<init>", "(Ljava/lang/String;I)V", false);
methodVisitor.visitFieldInsn(PUTSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
methodVisitor.visitInsn(ICONST_1);
methodVisitor.visitTypeInsn(ANEWARRAY, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
methodVisitor.visitInsn(DUP);
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitFieldInsn(GETSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
methodVisitor.visitInsn(AASTORE);
methodVisitor.visitFieldInsn(PUTSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
methodVisitor.visitInsn(RETURN);
methodVisitor.visitMaxs(4, 0);
methodVisitor.visitEnd();
}
classWriter.visitEnd();
return classWriter.toByteArray();
}
Example 12
| Source File: PlatformProviderGenerator.java From flogger with Apache License 2.0 | 4 votes |
|
private static void tryBlockForPlatform(MethodVisitor methodVisitor, String platformType) {
methodVisitor.visitCode();
// Generate the enveloping try/catch block:
//
// try {
// ...
// } catch (NoClassDefFoundError | IllegalAccessException | InstantiationException
// | InvocationTargetException | NoSuchMethodException e) {
// ...
// }
//
// Note that the exception types need to be listed explicitly (rather than using
// java.lang.ReflectiveOperationException) because that parent exception type isn't available
// on Android until API level 19.
Label startLabel = new Label();
Label endLabel = new Label();
Label handlerLabel = new Label();
methodVisitor.visitTryCatchBlock(
startLabel, endLabel, handlerLabel, "java/lang/NoClassDefFoundError");
methodVisitor.visitTryCatchBlock(
startLabel, endLabel, handlerLabel, "java/lang/IllegalAccessException");
methodVisitor.visitTryCatchBlock(
startLabel, endLabel, handlerLabel, "java/lang/InstantiationException");
methodVisitor.visitTryCatchBlock(
startLabel, endLabel, handlerLabel, "java/lang/reflect/InvocationTargetException");
methodVisitor.visitTryCatchBlock(
startLabel, endLabel, handlerLabel, "java/lang/NoSuchMethodException");
methodVisitor.visitLabel(startLabel);
// Generate the actual reflective constructor call inside the try block:
//
// return (Platform) PlatformClass.class.getDeclaredConstructor().newInstance();
//
// Note that the constructor call happens reflectively to make sure that the platform class
// isn't loaded until actually executing this instruction. That is important because an
// earlier class load could happen outside of the try/catch block where we are explicitly
// handling the case of the class not being present.
methodVisitor.visitLdcInsn(Type.getType(platformType));
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitTypeInsn(ANEWARRAY, "java/lang/Class");
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL,
"java/lang/Class",
"getDeclaredConstructor",
"([Ljava/lang/Class;)Ljava/lang/reflect/Constructor;",
false);
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitTypeInsn(ANEWARRAY, "java/lang/Object");
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL,
"java/lang/reflect/Constructor",
"newInstance",
"([Ljava/lang/Object;)Ljava/lang/Object;",
false);
methodVisitor.visitTypeInsn(CHECKCAST, "com/google/common/flogger/backend/Platform");
methodVisitor.visitLabel(endLabel);
methodVisitor.visitInsn(ARETURN);
// Generate the catch block of the overall try/catch. The catch block is actually just empty,
// but Java does require the catch handler to have at least a frame in it to declare the
// exception variable that is available within the catch block scope:
// https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-3.html#jvms-3.12
methodVisitor.visitLabel(handlerLabel);
methodVisitor.visitFrame(F_SAME1, 0, null, 1, new Object[] {"java/lang/Throwable"});
methodVisitor.visitVarInsn(ASTORE, 0);
}
Example 13
| Source File: InnerClassTest.java From JAADAS with GNU General Public License v3.0 | 4 votes |
|
@Override
protected void generate(TraceClassVisitor visitor) {
MethodVisitor mv;
FieldVisitor fv;
visitor.visit(V1_1, ACC_SUPER, "soot/asm/backend/targets/InnerClass$Inner", null,
"java/lang/Object", null);
visitor.visitSource("InnerClass.java", null);
visitor.visitInnerClass("soot/asm/backend/targets/InnerClass$Inner", "soot/asm/backend/targets/InnerClass",
"Inner", ACC_PRIVATE);
{
fv = visitor.visitField(ACC_FINAL + ACC_STATIC, "a", "I", null,
new Integer(3));
fv.visitEnd();
}
{
fv = visitor.visitField(ACC_FINAL + ACC_SYNTHETIC, "this$0",
"Lsoot/asm/backend/targets/InnerClass;", null, null);
fv.visitEnd();
}
{
mv = visitor.visitMethod(ACC_PRIVATE, "<init>",
"(Lsoot/asm/backend/targets/InnerClass;)V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitFieldInsn(PUTFIELD, "soot/asm/backend/targets/InnerClass$Inner", "this$0",
"Lsoot/asm/backend/targets/InnerClass;");
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>",
"()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
visitor.visitEnd();
}
Example 14
| Source File: SpelCompiler.java From bistoury with GNU General Public License v3.0 | 4 votes |
|
/**
* Generate the class that encapsulates the compiled expression and define it.
* The generated class will be a subtype of CompiledExpression.
*
* @param expressionToCompile the expression to be compiled
* @return the expression call, or {@code null} if the decision was to opt out of
* compilation during code generation
*/
@SuppressWarnings("unchecked")
private Class<? extends CompiledExpression> createExpressionClass(SpelNodeImpl expressionToCompile) {
// Create class outline 'spel/ExNNN extends org.springframework.expression.spel.CompiledExpression'
String clazzName = "qunar/tc/bistoury/instrument/client/debugger/Ex" + getNextSuffix();
ClassWriter cw = new ExpressionClassWriter();
cw.visit(V1_5, ACC_PUBLIC, clazzName, null, "qunar/tc/bistoury/instrument/client/debugger/CompiledExpression", null);
// Create default constructor
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "qunar/tc/bistoury/instrument/client/debugger/CompiledExpression",
"<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
// Create getValue() method
mv = cw.visitMethod(ACC_PUBLIC, "getValue",
"(Ljava/lang/Object;Lqunar/tc/bistoury/instrument/client/debugger/EvaluationContext;)Ljava/lang/Object;", null,
new String[]{"qunar/tc/bistoury/instrument/client/debugger/EvaluationException"});
mv.visitCode();
CodeFlow cf = new CodeFlow(clazzName, cw);
// Ask the expression AST to generate the body of the method
try {
expressionToCompile.generateCode(mv, cf);
} catch (IllegalStateException ex) {
if (logger.isDebugEnabled()) {
logger.debug(expressionToCompile.getClass().getSimpleName() +
".generateCode opted out of compilation: " + ex.getMessage());
}
return null;
}
CodeFlow.insertBoxIfNecessary(mv, cf.lastDescriptor());
if ("V".equals(cf.lastDescriptor())) {
mv.visitInsn(ACONST_NULL);
}
mv.visitInsn(ARETURN);
mv.visitMaxs(0, 0); // not supplied due to COMPUTE_MAXS
mv.visitEnd();
cw.visitEnd();
cf.finish();
byte[] data = cw.toByteArray();
// TODO need to make this conditionally occur based on a debug flag
// dump(expressionToCompile.toStringAST(), clazzName, data);
return (Class<? extends CompiledExpression>) this.ccl.defineClass(clazzName.replaceAll("/", "."), data);
}
Example 15
| Source File: InterfaceFieldClassGeneratorVisitor.java From AVM with MIT License | 4 votes |
|
@Override
public void visitEnd() {
// generate the class only if interface has declared fields
if (isInterface && fields.size() > 0) {
/* AKI-329: Previously generated classes using InterfaceFieldMappingVisitor had the FIELDS suffix. To deserialize classes correctly and in
the same order, this suffix is kept for re-transformation. However, this name can collide with any interface inner class called FIELDS.
So all the inner class names starting with FIELDS are collected so that the generated class name will not collide with any preexisting user classes.
*/
if (generatedClassName == null) {
generatedClassName = getNextAvailableFieldsClassName();
}
interfaceFieldClassNames.put(className, generatedClassName);
String genSuperName = javaLangObject;
int genAccess = access & ~ACC_INTERFACE;
ClassWriter cw = new ClassWriter(0);
// class declaration
cw.visit(V1_6, genAccess, generatedClassName, null, genSuperName, null);
// default constructor
{
MethodVisitor mv = cw.visitMethod(ACC_PRIVATE, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0); //load the first local variable: this
mv.visitMethodInsn(INVOKESPECIAL, javaLangObject, "<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
// fields
for (FieldNode field : fields) {
field.accept(cw);
}
// clinit
if (clinit != null) {
clinit.accept(cw);
}
consumer.accept(genSuperName, generatedClassName, cw.toByteArray());
}
}
Example 16
| Source File: ListenerHelpers.java From HttpSessionReplacer with MIT License | 4 votes |
|
static void staticInit(String className, MethodVisitor mv) {
mv.visitMethodInsn(INVOKESTATIC, className,
"$$isServlet3", "()Z", false);
mv.visitFieldInsn(PUTSTATIC, className, "$$isServlet3",
"Z");
}
Example 17
| Source File: AsmClassGenerator.java From groovy with Apache License 2.0 | 4 votes |
|
@Override
public void visitVariableExpression(final VariableExpression expression) {
final String variableName = expression.getName();
if (expression.isThisExpression()) {
// "this" in static context is Class instance
if (controller.isStaticMethod() || controller.getCompileStack().isInSpecialConstructorCall()
|| (!controller.getCompileStack().isImplicitThis() && controller.isStaticContext())) {
ClassNode thisType = controller.getClassNode();
if (controller.isInGeneratedFunction()) {
do { thisType = thisType.getOuterClass();
} while (ClassHelper.isGeneratedFunction(thisType));
}
classX(thisType).visit(this);
} else {
loadThis(expression);
}
return;
}
if (expression.isSuperExpression()) {
// "super" in static context is Class instance
if (controller.isStaticMethod()) {
ClassNode superType = controller.getClassNode().getSuperClass();
classX(superType).visit(this);
} else {
loadThis(expression);
}
return;
}
BytecodeVariable variable = controller.getCompileStack().getVariable(variableName, false);
if (variable != null) {
controller.getOperandStack().loadOrStoreVariable(variable, expression.isUseReferenceDirectly());
} else if (passingParams && controller.isInScriptBody()) {
MethodVisitor mv = controller.getMethodVisitor();
mv.visitTypeInsn(NEW, "org/codehaus/groovy/runtime/ScriptReference");
mv.visitInsn(DUP);
loadThisOrOwner();
mv.visitLdcInsn(variableName);
mv.visitMethodInsn(INVOKESPECIAL, "org/codehaus/groovy/runtime/ScriptReference", "<init>", "(Lgroovy/lang/Script;Ljava/lang/String;)V", false);
} else {
PropertyExpression pexp = thisPropX(true, variableName);
pexp.getObjectExpression().setSourcePosition(expression);
pexp.getProperty().setSourcePosition(expression);
pexp.visit(this);
}
if (!controller.getCompileStack().isLHS()) {
controller.getAssertionWriter().record(expression);
}
}
Example 18
| Source File: TestThirdEnhance.java From jvm-sandbox with GNU Lesser General Public License v3.0 | 4 votes |
|
@Override
public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature,
final String[] exceptions) {
final MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
final String signCode = getBehaviorSignCode(name, desc);
if (!isMatchedBehavior(signCode)) {
return mv;
}
return new ThirdReWriteMethod(api, mv) {
@Override
public void visitInsn(final int opcode) {
switch (opcode) {
case RETURN:
case IRETURN:
case FRETURN:
case ARETURN:
case LRETURN:
case DRETURN:
onExit();
break;
default:
break;
}
super.visitInsn(opcode);
}
private void onExit() {
Label startTryBlock = new Label();
Label endTryBlock = new Label();
Label startCatchBlock = new Label();
Label endCatchBlock = new Label();
mv.visitLabel(startTryBlock);
//静态调用
Type type = Type.getType(Math.class);
String owner = type.getInternalName();
mv.visitMethodInsn(INVOKESTATIC, owner, method.getName(), method.getDescriptor(), false);
mv.visitInsn(POP2);
mv.visitLabel(endTryBlock);
mv.visitJumpInsn(GOTO,endCatchBlock);
mv.visitLabel(startCatchBlock);
mv.visitInsn(POP);
mv.visitLabel(endCatchBlock);
mv.visitTryCatchBlock(startTryBlock,endTryBlock,startCatchBlock,ASM_TYPE_THROWABLE.getInternalName());
}
};
}
Example 19
| Source File: LoggerGenerator.java From beautiful_logger with MIT License | 4 votes |
|
public static void main(String[] args) throws IOException {
ClassWriter writer = new ClassWriter(COMPUTE_MAXS|COMPUTE_MAXS);
// reserve slot 1 of the constant pool (see LoggerServiceSPI)
writer.newClass("com/github/forax/beautifullogger/Logger");
writer.visit(V1_8, ACC_SUPER,
"com/github/forax/beautifullogger/Logger$Stub", null,
"java/lang/Object",
new String[] {"com/github/forax/beautifullogger/Logger"});
// field
writer.visitField(ACC_PRIVATE|ACC_FINAL, "mh", "Ljava/lang/invoke/MethodHandle;", null, null);
// constructor
MethodVisitor init = writer.visitMethod(ACC_PRIVATE, "<init>", "(Ljava/lang/invoke/MethodHandle;)V", null, null);
init.visitCode();
init.visitVarInsn(ALOAD, 0);
init.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
init.visitVarInsn(ALOAD, 0);
init.visitVarInsn(ALOAD, 1);
init.visitFieldInsn(PUTFIELD, "com/github/forax/beautifullogger/Logger$Stub", "mh", "Ljava/lang/invoke/MethodHandle;");
init.visitInsn(RETURN);
init.visitMaxs(0, 0);
init.visitEnd();
// static factory method
MethodVisitor factory = writer.visitMethod(ACC_PUBLIC|ACC_STATIC, "create",
"(Ljava/lang/invoke/MethodHandle;)Lcom/github/forax/beautifullogger/Logger;", null, null);
factory.visitCode();
factory.visitTypeInsn(NEW, "com/github/forax/beautifullogger/Logger$Stub");
factory.visitInsn(DUP);
factory.visitVarInsn(ALOAD, 0);
factory.visitMethodInsn(INVOKESPECIAL, "com/github/forax/beautifullogger/Logger$Stub", "<init>",
"(Ljava/lang/invoke/MethodHandle;)V", false);
factory.visitInsn(ARETURN);
factory.visitMaxs(0, 0);
factory.visitEnd();
// method
generateOverride(writer,
Paths.get("target/main/exploded/com.github.forax.beautifullogger/com/github/forax/beautifullogger/Logger.class"));
generateOverride(writer,
Paths.get("target/main/exploded/com.github.forax.beautifullogger/com/github/forax/beautifullogger/LogService.class"));
writer.visitEnd();
byte[] array = writer.toByteArray();
//DEBUG
//Files.write(Paths.get("Logger$Stub.class"), array);
String data = new String(Base64.getEncoder().encode(array), ISO_8859_1);
System.out.println(data);
}
Example 20
| Source File: Utils.java From JQF with BSD 2-Clause "Simplified" License | 4 votes |
|
public static void addSpecialInsn(MethodVisitor mv, int val) {
addBipushInsn(mv, val);
mv.visitMethodInsn(INVOKESTATIC, Config.instance.analysisClass,
"SPECIAL", "(I)V", false);
}
