Java Code Examples for org.objectweb.asm.MethodVisitor#visitFrame()
The following examples show how to use
org.objectweb.asm.MethodVisitor#visitFrame() .
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Example 1
| Source File: FrameNode.java From JByteMod-Beta with GNU General Public License v2.0 | 6 votes |
|
/**
* Makes the given visitor visit this stack map frame.
*
* @param mv
* a method visitor.
*/
@Override
public void accept(final MethodVisitor mv) {
switch (type) {
case Opcodes.F_NEW:
case Opcodes.F_FULL:
mv.visitFrame(type, local.size(), asArray(local), stack.size(), asArray(stack));
break;
case Opcodes.F_APPEND:
mv.visitFrame(type, local.size(), asArray(local), 0, null);
break;
case Opcodes.F_CHOP:
mv.visitFrame(type, local.size(), null, 0, null);
break;
case Opcodes.F_SAME:
mv.visitFrame(type, 0, null, 0, null);
break;
case Opcodes.F_SAME1:
mv.visitFrame(type, 0, null, 1, asArray(stack));
break;
}
}
Example 2
| Source File: EqualsMethod.java From byte-buddy with Apache License 2.0 | 6 votes |
|
/**
* {@inheritDoc}
*/
public Size apply(MethodVisitor methodVisitor, Context implementationContext) {
methodVisitor.visitJumpInsn(Opcodes.GOTO, endOfBlock);
methodVisitor.visitLabel(secondValueNull);
if (implementationContext.getClassFileVersion().isAtLeast(ClassFileVersion.JAVA_V6)) {
methodVisitor.visitFrame(Opcodes.F_SAME1, EMPTY.length, EMPTY, REFERENCE.length, REFERENCE);
}
methodVisitor.visitJumpInsn(Opcodes.IFNULL, endOfBlock);
methodVisitor.visitLabel(firstValueNull);
if (implementationContext.getClassFileVersion().isAtLeast(ClassFileVersion.JAVA_V6)) {
methodVisitor.visitFrame(Opcodes.F_SAME, EMPTY.length, EMPTY, EMPTY.length, EMPTY);
}
methodVisitor.visitInsn(Opcodes.ICONST_0);
methodVisitor.visitInsn(Opcodes.IRETURN);
methodVisitor.visitLabel(endOfBlock);
if (implementationContext.getClassFileVersion().isAtLeast(ClassFileVersion.JAVA_V6)) {
methodVisitor.visitFrame(Opcodes.F_SAME, EMPTY.length, EMPTY, EMPTY.length, EMPTY);
}
return new Size(0, 0);
}
Example 3
| Source File: WeavingClassVisitor.java From glowroot with Apache License 2.0 | 6 votes |
|
private static void addLoadClassConditional(MethodVisitor mv, Object[] locals) {
Label label0 = new Label();
Label label1 = new Label();
Label label2 = new Label();
mv.visitTryCatchBlock(label0, label1, label2, "java/lang/ClassNotFoundException");
mv.visitVarInsn(ALOAD, 1);
mv.visitLdcInsn("org.glowroot.agent");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "startsWith", "(Ljava/lang/String;)Z",
false);
Label label3 = new Label();
mv.visitJumpInsn(IFEQ, label3);
mv.visitLabel(label0);
mv.visitVarInsn(ALOAD, 1);
mv.visitInsn(ICONST_0);
mv.visitInsn(ACONST_NULL);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Class", "forName",
"(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;", false);
mv.visitLabel(label1);
mv.visitInsn(ARETURN);
mv.visitLabel(label2);
mv.visitFrame(F_NEW, locals.length, locals, 1,
new Object[] {"java/lang/ClassNotFoundException"});
mv.visitInsn(POP);
mv.visitLabel(label3);
mv.visitFrame(F_NEW, locals.length, locals, 0, new Object[0]);
}
Example 4
| Source File: FrameNode.java From Cafebabe with GNU General Public License v3.0 | 6 votes |
|
@Override
public void accept(final MethodVisitor methodVisitor) {
switch (type) {
case Opcodes.F_NEW:
case Opcodes.F_FULL:
methodVisitor.visitFrame(type, local.size(), asArray(local), stack.size(), asArray(stack));
break;
case Opcodes.F_APPEND:
methodVisitor.visitFrame(type, local.size(), asArray(local), 0, null);
break;
case Opcodes.F_CHOP:
methodVisitor.visitFrame(type, local.size(), null, 0, null);
break;
case Opcodes.F_SAME:
methodVisitor.visitFrame(type, 0, null, 0, null);
break;
case Opcodes.F_SAME1:
methodVisitor.visitFrame(type, 0, null, 1, asArray(stack));
break;
default:
throw new IllegalArgumentException();
}
}
Example 5
| Source File: FrameNode.java From JReFrameworker with MIT License | 6 votes |
|
@Override
public void accept(final MethodVisitor methodVisitor) {
switch (type) {
case Opcodes.F_NEW:
case Opcodes.F_FULL:
methodVisitor.visitFrame(type, local.size(), asArray(local), stack.size(), asArray(stack));
break;
case Opcodes.F_APPEND:
methodVisitor.visitFrame(type, local.size(), asArray(local), 0, null);
break;
case Opcodes.F_CHOP:
methodVisitor.visitFrame(type, local.size(), null, 0, null);
break;
case Opcodes.F_SAME:
methodVisitor.visitFrame(type, 0, null, 0, null);
break;
case Opcodes.F_SAME1:
methodVisitor.visitFrame(type, 0, null, 1, asArray(stack));
break;
default:
throw new IllegalArgumentException();
}
}
Example 6
| Source File: HashCodeMethod.java From byte-buddy with Apache License 2.0 | 5 votes |
|
/**
* {@inheritDoc}
*/
public Size apply(MethodVisitor methodVisitor, Context implementationContext) {
methodVisitor.visitLabel(label);
if (implementationContext.getClassFileVersion().isAtLeast(ClassFileVersion.JAVA_V6)) {
methodVisitor.visitFrame(Opcodes.F_SAME1, EMPTY.length, EMPTY, INTEGER.length, INTEGER);
}
return new Size(0, 0);
}
Example 7
| Source File: AdviceInconsistentStackSizeTest.java From byte-buddy with Apache License 2.0 | 5 votes |
|
public Size apply(MethodVisitor methodVisitor, Context implementationContext, MethodDescription instrumentedMethod) {
if (original != null) {
methodVisitor.visitLdcInsn(original);
}
methodVisitor.visitInsn(opcode);
methodVisitor.visitFrame(Opcodes.F_SAME, 0, new Object[0], 0, new Object[0]);
if (original != null) {
methodVisitor.visitLdcInsn(original);
methodVisitor.visitLdcInsn(original);
}
methodVisitor.visitInsn(opcode);
return new Size(StackSize.of(type).getSize() * 2, instrumentedMethod.getStackSize());
}
Example 8
| Source File: GenerateMoreHackedConstructorBytecode.java From glowroot with Apache License 2.0 | 5 votes |
|
static LazyDefinedClass generateMoreHackedConstructorBytecode() throws Exception {
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
MethodVisitor mv;
// 1.7+ since testing frames
cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "MoreHackedConstructorBytecode", null,
Test.class.getName().replace('.', '/'), new String[] {});
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
Label trueLabel = new Label();
mv.visitInsn(ICONST_0);
mv.visitJumpInsn(IFEQ, trueLabel);
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ATHROW);
mv.visitLabel(trueLabel);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, Test.class.getName().replace('.', '/'), "<init>",
"()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
cw.visitEnd();
return ImmutableLazyDefinedClass.builder()
.type(Type.getObjectType("MoreHackedConstructorBytecode"))
.bytes(cw.toByteArray())
.build();
}
Example 9
| Source File: AdviceInconsistentFrameTest.java From byte-buddy with Apache License 2.0 | 4 votes |
|
public Size apply(MethodVisitor methodVisitor, Context implementationContext, MethodDescription instrumentedMethod) {
methodVisitor.visitFrame(Opcodes.F_FULL, 0, new Object[0], 0, new Object[0]);
methodVisitor.visitLdcInsn(BAR);
methodVisitor.visitInsn(Opcodes.ARETURN);
return new Size(1, 2);
}
Example 10
| Source File: AsmClassAccess.java From jadira with Apache License 2.0 | 4 votes |
|
private static void enhanceForGetValuePrimitive(ClassVisitor cw, String accessClassNm, String clazzNm, Field[] fields, Type type) {
String methodName;
final String typeNm = type.getDescriptor();
final int instruction;
switch (type.getSort()) {
case Type.BOOLEAN:
methodName = "getBooleanValue";
instruction = IRETURN;
break;
case Type.BYTE:
methodName = "getByteValue";
instruction = IRETURN;
break;
case Type.CHAR:
methodName = "getCharValue";
instruction = IRETURN;
break;
case Type.SHORT:
methodName = "getShortValue";
instruction = IRETURN;
break;
case Type.INT:
methodName = "getIntValue";
instruction = IRETURN;
break;
case Type.FLOAT:
methodName = "getFloatValue";
instruction = FRETURN;
break;
case Type.LONG:
methodName = "getLongValue";
instruction = LRETURN;
break;
case Type.DOUBLE:
methodName = "getDoubleValue";
instruction = DRETURN;
break;
default:
methodName = "getValue";
instruction = ARETURN;
break;
}
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, methodName, "(Ljava/lang/Object;Ljava/lang/String;)" + typeNm, null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, accessClassNm, "fieldNames", "[Ljava/lang/String;");
mv.visitVarInsn(ALOAD, 2);
mv.visitMethodInsn(INVOKESTATIC, "java/util/Arrays", "binarySearch", "([Ljava/lang/Object;Ljava/lang/Object;)I");
mv.visitVarInsn(ISTORE, 3);
mv.visitVarInsn(ILOAD, 3);
final int maxStack;
if (fields.length > 0) {
maxStack = 5;
Label[] labels = constructLabels(fields);
Label defaultLabel = new Label();
mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);
for (int i = 0, n = labels.length; i < n; i++) {
Field field = fields[i];
mv.visitLabel(labels[i]);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitVarInsn(ALOAD, 1);
mv.visitTypeInsn(CHECKCAST, clazzNm);
mv.visitFieldInsn(GETFIELD, clazzNm, field.getName(), typeNm);
mv.visitInsn(instruction);
}
mv.visitLabel(defaultLabel);
mv.visitFrame(F_SAME, 0, null, 0, null);
} else {
maxStack = 6;
}
enhanceForThrowingException(mv, IllegalArgumentException.class, "Field was not found", "Ljava/lang/Object;", ALOAD, 2);
mv.visitMaxs(maxStack, 4);
mv.visitEnd();
}
Example 11
| Source File: FieldAccess.java From reflectasm with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
static private void insertSetObject (ClassWriter cw, String classNameInternal, ArrayList<Field> fields) {
int maxStack = 6;
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "set", "(Ljava/lang/Object;ILjava/lang/Object;)V", null, null);
mv.visitCode();
mv.visitVarInsn(ILOAD, 2);
if (!fields.isEmpty()) {
maxStack--;
Label[] labels = new Label[fields.size()];
for (int i = 0, n = labels.length; i < n; i++)
labels[i] = new Label();
Label defaultLabel = new Label();
mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);
for (int i = 0, n = labels.length; i < n; i++) {
Field field = fields.get(i);
Type fieldType = Type.getType(field.getType());
mv.visitLabel(labels[i]);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitVarInsn(ALOAD, 1);
mv.visitTypeInsn(CHECKCAST, classNameInternal);
mv.visitVarInsn(ALOAD, 3);
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/Byte");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Byte", "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/Short");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Short", "shortValue", "()S");
break;
case Type.INT:
mv.visitTypeInsn(CHECKCAST, "java/lang/Integer");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Integer", "intValue", "()I");
break;
case Type.FLOAT:
mv.visitTypeInsn(CHECKCAST, "java/lang/Float");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Float", "floatValue", "()F");
break;
case Type.LONG:
mv.visitTypeInsn(CHECKCAST, "java/lang/Long");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Long", "longValue", "()J");
break;
case Type.DOUBLE:
mv.visitTypeInsn(CHECKCAST, "java/lang/Double");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Double", "doubleValue", "()D");
break;
case Type.ARRAY:
mv.visitTypeInsn(CHECKCAST, fieldType.getDescriptor());
break;
case Type.OBJECT:
mv.visitTypeInsn(CHECKCAST, fieldType.getInternalName());
break;
}
mv.visitFieldInsn(PUTFIELD, field.getDeclaringClass().getName().replace('.', '/'), field.getName(),
fieldType.getDescriptor());
mv.visitInsn(RETURN);
}
mv.visitLabel(defaultLabel);
mv.visitFrame(F_SAME, 0, null, 0, null);
}
mv = insertThrowExceptionForFieldNotFound(mv);
mv.visitMaxs(maxStack, 4);
mv.visitEnd();
}
Example 12
| Source File: AsmClassAccess.java From jadira with Apache License 2.0 | 4 votes |
|
private static void enhanceForGetValueObject(ClassVisitor cw, String accessClassNm, String clazzNm, Field[] fields) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "getValue", "(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, accessClassNm, "fieldNames", "[Ljava/lang/String;");
mv.visitVarInsn(ALOAD, 2);
mv.visitMethodInsn(INVOKESTATIC, "java/util/Arrays", "binarySearch", "([Ljava/lang/Object;Ljava/lang/Object;)I");
mv.visitVarInsn(ISTORE, 3);
mv.visitVarInsn(ILOAD, 3);
final int maxStack;
if (fields.length > 0) {
maxStack = 5;
Label[] labels = constructLabels(fields);
Label defaultLabel = new Label();
mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);
for (int i = 0, n = labels.length; i < n; i++) {
Field field = fields[i];
mv.visitLabel(labels[i]);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitVarInsn(ALOAD, 1);
mv.visitTypeInsn(CHECKCAST, clazzNm);
mv.visitFieldInsn(GETFIELD, clazzNm, field.getName(), Type.getDescriptor(field.getType()));
Type fieldType = Type.getType(field.getType());
switch (fieldType.getSort()) {
case Type.BOOLEAN:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;");
break;
case Type.BYTE:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;");
break;
case Type.CHAR:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;");
break;
case Type.SHORT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;");
break;
case Type.INT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;");
break;
case Type.FLOAT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;");
break;
case Type.LONG:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;");
break;
case Type.DOUBLE:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;");
break;
}
mv.visitInsn(ARETURN);
}
mv.visitLabel(defaultLabel);
mv.visitFrame(F_SAME, 0, null, 0, null);
} else {
maxStack = 6;
}
enhanceForThrowingException(mv, IllegalArgumentException.class, "Field was not found", "Ljava/lang/Object;", ALOAD, 2);
mv.visitMaxs(maxStack, 4);
mv.visitEnd();
}
Example 13
| Source File: FieldAccess.java From reflectasm with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
static private void insertSetPrimitive (ClassWriter cw, String classNameInternal, ArrayList<Field> fields,
Type primitiveType) {
int maxStack = 6;
int maxLocals = 4; // See correction below for LLOAD and DLOAD
final String setterMethodName;
final String typeNameInternal = primitiveType.getDescriptor();
final int loadValueInstruction;
switch (primitiveType.getSort()) {
case Type.BOOLEAN:
setterMethodName = "setBoolean";
loadValueInstruction = ILOAD;
break;
case Type.BYTE:
setterMethodName = "setByte";
loadValueInstruction = ILOAD;
break;
case Type.CHAR:
setterMethodName = "setChar";
loadValueInstruction = ILOAD;
break;
case Type.SHORT:
setterMethodName = "setShort";
loadValueInstruction = ILOAD;
break;
case Type.INT:
setterMethodName = "setInt";
loadValueInstruction = ILOAD;
break;
case Type.FLOAT:
setterMethodName = "setFloat";
loadValueInstruction = FLOAD;
break;
case Type.LONG:
setterMethodName = "setLong";
loadValueInstruction = LLOAD;
maxLocals++; // (LLOAD and DLOAD actually load two slots)
break;
case Type.DOUBLE:
setterMethodName = "setDouble";
loadValueInstruction = DLOAD;
maxLocals++; // (LLOAD and DLOAD actually load two slots)
break;
default:
setterMethodName = "set";
loadValueInstruction = ALOAD;
break;
}
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, setterMethodName, "(Ljava/lang/Object;I" + typeNameInternal + ")V", null,
null);
mv.visitCode();
mv.visitVarInsn(ILOAD, 2);
if (!fields.isEmpty()) {
maxStack--;
Label[] labels = new Label[fields.size()];
Label labelForInvalidTypes = new Label();
boolean hasAnyBadTypeLabel = false;
for (int i = 0, n = labels.length; i < n; i++) {
if (Type.getType(fields.get(i).getType()).equals(primitiveType))
labels[i] = new Label();
else {
labels[i] = labelForInvalidTypes;
hasAnyBadTypeLabel = true;
}
}
Label defaultLabel = new Label();
mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);
for (int i = 0, n = labels.length; i < n; i++) {
if (!labels[i].equals(labelForInvalidTypes)) {
Field field = fields.get(i);
mv.visitLabel(labels[i]);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitVarInsn(ALOAD, 1);
mv.visitTypeInsn(CHECKCAST, classNameInternal);
mv.visitVarInsn(loadValueInstruction, 3);
mv.visitFieldInsn(PUTFIELD, field.getDeclaringClass().getName().replace('.', '/'), field.getName(),
typeNameInternal);
mv.visitInsn(RETURN);
}
}
// Rest of fields: different type
if (hasAnyBadTypeLabel) {
mv.visitLabel(labelForInvalidTypes);
mv.visitFrame(F_SAME, 0, null, 0, null);
insertThrowExceptionForFieldType(mv, primitiveType.getClassName());
}
// Default: field not found
mv.visitLabel(defaultLabel);
mv.visitFrame(F_SAME, 0, null, 0, null);
}
mv = insertThrowExceptionForFieldNotFound(mv);
mv.visitMaxs(maxStack, maxLocals);
mv.visitEnd();
}
Example 14
| Source File: AdviceInconsistentFrameTest.java From byte-buddy with Apache License 2.0 | 4 votes |
|
public Size apply(MethodVisitor methodVisitor, Context implementationContext, MethodDescription instrumentedMethod) {
methodVisitor.visitFrame(Opcodes.F_FULL, 1, new Object[]{TypeDescription.OBJECT.getInternalName()}, 0, new Object[0]);
methodVisitor.visitLdcInsn(BAR);
methodVisitor.visitInsn(Opcodes.ARETURN);
return new Size(1, 2);
}
Example 15
| Source File: AdviceInconsistentFrameTest.java From byte-buddy with Apache License 2.0 | 4 votes |
|
public Size apply(MethodVisitor methodVisitor, Context implementationContext, MethodDescription instrumentedMethod) {
methodVisitor.visitFrame(Opcodes.F_FULL, 1, new Object[]{TypeDescription.OBJECT.getInternalName()}, 0, new Object[0]);
methodVisitor.visitLdcInsn(BAR);
methodVisitor.visitInsn(Opcodes.ARETURN);
return new Size(1, 2);
}
Example 16
| Source File: UnbalancedMonitorsTest.java From openjdk-jdk9 with GNU General Public License v2.0 | 4 votes |
|
private static void visitWrongOrder(ClassWriter cw) {
MethodVisitor mv;
mv = cw.visitMethod(ACC_PUBLIC, "wrongOrder", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", null, null);
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, null);
Label l3 = new Label();
mv.visitTryCatchBlock(l2, l3, l2, null);
Label l4 = new Label();
Label l5 = new Label();
Label l6 = new Label();
mv.visitTryCatchBlock(l4, l5, l6, null);
Label l7 = new Label();
mv.visitTryCatchBlock(l2, l7, l6, null);
Label l8 = new Label();
mv.visitLabel(l8);
mv.visitVarInsn(ALOAD, 1);
mv.visitInsn(DUP);
mv.visitVarInsn(ASTORE, 3);
mv.visitInsn(MONITORENTER);
mv.visitLabel(l4);
mv.visitVarInsn(ALOAD, 2);
mv.visitInsn(DUP);
mv.visitVarInsn(ASTORE, 4);
mv.visitInsn(MONITORENTER);
mv.visitLabel(l0);
mv.visitVarInsn(ALOAD, 2);
mv.visitVarInsn(ALOAD, 3);
mv.visitInsn(MONITOREXIT);
mv.visitLabel(l1);
// Swapped exit order with exit above
mv.visitVarInsn(ALOAD, 4);
mv.visitInsn(MONITOREXIT);
mv.visitLabel(l5);
mv.visitInsn(ARETURN);
mv.visitLabel(l2);
mv.visitFrame(Opcodes.F_FULL, 5, new Object[]{INNER_CLASS_NAME_INTERNAL, "java/lang/Object", "java/lang/Object", "java/lang/Object",
"java/lang/Object"}, 1, new Object[]{"java/lang/Throwable"});
mv.visitVarInsn(ALOAD, 4);
mv.visitInsn(MONITOREXIT);
mv.visitLabel(l3);
mv.visitInsn(ATHROW);
mv.visitLabel(l6);
mv.visitFrame(Opcodes.F_FULL, 4, new Object[]{INNER_CLASS_NAME_INTERNAL, "java/lang/Object", "java/lang/Object", "java/lang/Object"}, 1,
new Object[]{"java/lang/Throwable"});
mv.visitVarInsn(ALOAD, 3);
mv.visitInsn(MONITOREXIT);
mv.visitLabel(l7);
mv.visitInsn(ATHROW);
Label l9 = new Label();
mv.visitLabel(l9);
mv.visitMaxs(2, 5);
mv.visitEnd();
}
Example 17
| Source File: FieldAccess.java From reflectasm with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
static private void insertGetObject (ClassWriter cw, String classNameInternal, ArrayList<Field> fields) {
int maxStack = 6;
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "get", "(Ljava/lang/Object;I)Ljava/lang/Object;", null, null);
mv.visitCode();
mv.visitVarInsn(ILOAD, 2);
if (!fields.isEmpty()) {
maxStack--;
Label[] labels = new Label[fields.size()];
for (int i = 0, n = labels.length; i < n; i++)
labels[i] = new Label();
Label defaultLabel = new Label();
mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);
for (int i = 0, n = labels.length; i < n; i++) {
Field field = fields.get(i);
mv.visitLabel(labels[i]);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitVarInsn(ALOAD, 1);
mv.visitTypeInsn(CHECKCAST, classNameInternal);
mv.visitFieldInsn(GETFIELD, field.getDeclaringClass().getName().replace('.', '/'), field.getName(),
Type.getDescriptor(field.getType()));
Type fieldType = Type.getType(field.getType());
switch (fieldType.getSort()) {
case Type.BOOLEAN:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;");
break;
case Type.BYTE:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;");
break;
case Type.CHAR:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;");
break;
case Type.SHORT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;");
break;
case Type.INT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;");
break;
case Type.FLOAT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;");
break;
case Type.LONG:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;");
break;
case Type.DOUBLE:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;");
break;
}
mv.visitInsn(ARETURN);
}
mv.visitLabel(defaultLabel);
mv.visitFrame(F_SAME, 0, null, 0, null);
}
insertThrowExceptionForFieldNotFound(mv);
mv.visitMaxs(maxStack, 3);
mv.visitEnd();
}
Example 18
| Source File: BytecodeVerificationTest.java From AVM with MIT License | 4 votes |
|
@Test
public void testMaxStackSizeWithLoop() throws Exception {
int originalHash = 1;
TestResource original = new TestResource(originalHash);
ClassRewriter.IMethodReplacer replacer = new ClassRewriter.IMethodReplacer() {
@Override
public void populatMethod(MethodVisitor visitor) {
visitor.visitCode();
Label start = new Label();
Object[] newstack = new Object[1];
newstack[0] = Opcodes.INTEGER;
visitor.visitLabel(start);
//visitor.visitFrame(Opcodes.F_FULL, 0, null, 1, newstack);
visitor.visitFrame(Opcodes.F_FULL, 0, null, 0, null);
visitor.visitVarInsn(Opcodes.BIPUSH, 0);
visitor.visitJumpInsn(Opcodes.GOTO, start);
visitor.visitInsn(Opcodes.IRETURN);
visitor.visitMaxs(100, 100);
visitor.visitEnd();
}};
String className = original.getClass().getName();
byte[] raw = Utilities.loadRequiredResourceAsBytes(className.replaceAll("\\.", "/") + ".class");
byte[] rewrittten = ClassRewriter.rewriteOneMethodInClass(raw, "hashCode", replacer, 0);
Map<String, byte[]> classes = new HashMap<>();
classes.put(className, rewrittten);
AvmClassLoader loader = NodeEnvironment.singleton.createInvocationClassLoader(classes);
Class<?> clazz = loader.loadClass(className);
try{
Object target = clazz.getConstructor(int.class).newInstance(Integer.valueOf(originalHash));
target.hashCode();
Assert.assertEquals(1,0);
}catch (Error e){
Boolean expectedError = e.getMessage().contains("Inconsistent stackmap frames at branch target") ? true : false;
Assert.assertEquals(expectedError, true);
}
}
Example 19
| Source File: FMLPatcher.java From Launcher with GNU General Public License v3.0 | 4 votes |
|
private static byte[] gen(final String name, final String exName) { // "cpw/mods/fml/SafeExitJVMLegacy", "exit"
final ClassWriter classWriter = new ClassWriter(0);
MethodVisitor methodVisitor;
classWriter.visit(V1_8, ACC_PUBLIC | ACC_SUPER, name, null, "java/lang/Object", null);
{
methodVisitor = classWriter.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
methodVisitor.visitCode();
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
methodVisitor.visitInsn(RETURN);
methodVisitor.visitMaxs(1, 1);
methodVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, exName, "(I)V", null, null);
methodVisitor.visitCode();
final Label label0 = new Label();
final Label label1 = new Label();
final Label label2 = new Label();
methodVisitor.visitTryCatchBlock(label0, label1, label2, "java/lang/Throwable");
methodVisitor.visitLabel(label0);
methodVisitor.visitMethodInsn(INVOKESTATIC, "java/lang/Runtime", "getRuntime", "()Ljava/lang/Runtime;",
false);
methodVisitor.visitVarInsn(ILOAD, 0);
methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Runtime", "halt", "(I)V", false);
methodVisitor.visitLabel(label1);
final Label label3 = new Label();
methodVisitor.visitJumpInsn(GOTO, label3);
methodVisitor.visitLabel(label2);
methodVisitor.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[]{"java/lang/Throwable"});
methodVisitor.visitVarInsn(ASTORE, 1);
methodVisitor.visitVarInsn(ILOAD, 0);
methodVisitor.visitMethodInsn(INVOKESTATIC, "java/lang/System", "exit", "(I)V", false);
methodVisitor.visitLabel(label3);
methodVisitor.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
methodVisitor.visitInsn(RETURN);
methodVisitor.visitMaxs(2, 2);
methodVisitor.visitEnd();
}
classWriter.visitEnd();
return classWriter.toByteArray();
}
Example 20
| Source File: FieldAccess.java From reflectasm with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
static private void insertGetPrimitive (ClassWriter cw, String classNameInternal, ArrayList<Field> fields,
Type primitiveType) {
int maxStack = 6;
final String getterMethodName;
final String typeNameInternal = primitiveType.getDescriptor();
final int returnValueInstruction;
switch (primitiveType.getSort()) {
case Type.BOOLEAN:
getterMethodName = "getBoolean";
returnValueInstruction = IRETURN;
break;
case Type.BYTE:
getterMethodName = "getByte";
returnValueInstruction = IRETURN;
break;
case Type.CHAR:
getterMethodName = "getChar";
returnValueInstruction = IRETURN;
break;
case Type.SHORT:
getterMethodName = "getShort";
returnValueInstruction = IRETURN;
break;
case Type.INT:
getterMethodName = "getInt";
returnValueInstruction = IRETURN;
break;
case Type.FLOAT:
getterMethodName = "getFloat";
returnValueInstruction = FRETURN;
break;
case Type.LONG:
getterMethodName = "getLong";
returnValueInstruction = LRETURN;
break;
case Type.DOUBLE:
getterMethodName = "getDouble";
returnValueInstruction = DRETURN;
break;
default:
getterMethodName = "get";
returnValueInstruction = ARETURN;
break;
}
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, getterMethodName, "(Ljava/lang/Object;I)" + typeNameInternal, null, null);
mv.visitCode();
mv.visitVarInsn(ILOAD, 2);
if (!fields.isEmpty()) {
maxStack--;
Label[] labels = new Label[fields.size()];
Label labelForInvalidTypes = new Label();
boolean hasAnyBadTypeLabel = false;
for (int i = 0, n = labels.length; i < n; i++) {
if (Type.getType(fields.get(i).getType()).equals(primitiveType))
labels[i] = new Label();
else {
labels[i] = labelForInvalidTypes;
hasAnyBadTypeLabel = true;
}
}
Label defaultLabel = new Label();
mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);
for (int i = 0, n = labels.length; i < n; i++) {
Field field = fields.get(i);
if (!labels[i].equals(labelForInvalidTypes)) {
mv.visitLabel(labels[i]);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitVarInsn(ALOAD, 1);
mv.visitTypeInsn(CHECKCAST, classNameInternal);
mv.visitFieldInsn(GETFIELD, field.getDeclaringClass().getName().replace('.', '/'), field.getName(),
typeNameInternal);
mv.visitInsn(returnValueInstruction);
}
}
// Rest of fields: different type
if (hasAnyBadTypeLabel) {
mv.visitLabel(labelForInvalidTypes);
mv.visitFrame(F_SAME, 0, null, 0, null);
insertThrowExceptionForFieldType(mv, primitiveType.getClassName());
}
// Default: field not found
mv.visitLabel(defaultLabel);
mv.visitFrame(F_SAME, 0, null, 0, null);
}
mv = insertThrowExceptionForFieldNotFound(mv);
mv.visitMaxs(maxStack, 3);
mv.visitEnd();
}
