Java Code Examples for org.apache.bcel.generic.InstructionList#dispose()
The following examples show how to use
org.apache.bcel.generic.InstructionList#dispose() .
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Example 1
| Source File: TestArrayAccess03Creator.java From commons-bcel with Apache License 2.0 | 6 votes |
|
private void createMethod_1() {
final InstructionList il = new InstructionList();
final MethodGen method = new MethodGen(Const.ACC_PUBLIC | Const.ACC_STATIC, Type.VOID, new Type[] { Type.OBJECT },
new String[] { "arg0" }, "test", TEST_PACKAGE+".TestArrayAccess03", il, _cp);
final InstructionHandle ih_0 = il.append(new PUSH(_cp, 1));
Assert.assertNotNull(ih_0); // TODO why is this not used
il.append(_factory.createNewArray(new ObjectType(TEST_PACKAGE+".TestArrayAccess03"), (short) 1));
il.append(InstructionFactory.createStore(Type.OBJECT, 1));
final InstructionHandle ih_5 = il.append(InstructionFactory.createLoad(Type.OBJECT, 0));
Assert.assertNotNull(ih_5); // TODO why is this not used
il.append(new PUSH(_cp, 0));
il.append(_factory.createNew(TEST_PACKAGE+".TestArrayAccess03"));
il.append(InstructionConst.DUP);
il.append(_factory.createInvoke(TEST_PACKAGE+".TestArrayAccess03", "<init>", Type.VOID, Type.NO_ARGS, Const.INVOKESPECIAL));
il.append(InstructionConst.AASTORE);
final InstructionHandle ih_15 = il.append(InstructionFactory.createReturn(Type.VOID));
Assert.assertNotNull(ih_15); // TODO why is this not used
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 2
| Source File: TestArrayAccess04Creator.java From commons-bcel with Apache License 2.0 | 6 votes |
|
private void createMethod_1() {
final InstructionList il = new InstructionList();
final MethodGen method = new MethodGen(Const.ACC_PUBLIC | Const.ACC_STATIC, Type.VOID, new Type[] { Type.OBJECT },
new String[] { "arg0" }, "test", TEST_PACKAGE+".TestArrayAccess04", il, _cp);
final InstructionHandle ih_0 = il.append(new PUSH(_cp, 1));
Assert.assertNotNull(ih_0); // TODO why is this not used
il.append(_factory.createNewArray(Type.OBJECT, (short) 1));
il.append(InstructionFactory.createStore(Type.OBJECT, 1));
final InstructionHandle ih_5 = il.append(new PUSH(_cp, 1));
Assert.assertNotNull(ih_5); // TODO why is this not used
il.append(InstructionFactory.createStore(Type.INT, 2));
final InstructionHandle ih_7 = il.append(InstructionFactory.createLoad(Type.OBJECT, 1));
Assert.assertNotNull(ih_7); // TODO why is this not used
il.append(new PUSH(_cp, 0));
il.append(InstructionFactory.createLoad(Type.INT, 2));
il.append(InstructionConst.AASTORE);
final InstructionHandle ih_11 = il.append(InstructionFactory.createReturn(Type.VOID));
Assert.assertNotNull(ih_11); // TODO why is this not used
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 3
| Source File: TestReturn01Creator.java From commons-bcel with Apache License 2.0 | 6 votes |
|
private void createMethod_1() {
final InstructionList il = new InstructionList();
final MethodGen method = new MethodGen(Const.ACC_PUBLIC | Const.ACC_STATIC, Type.VOID, Type.NO_ARGS,
new String[] { }, "foo", TEST_PACKAGE+".TestReturn01", il, _cp);
final InstructionHandle ih_0 = il.append(_factory.createNew("java.lang.Object"));
Assert.assertNotNull(ih_0); // TODO why is this not used
il.append(InstructionConst.DUP);
il.append(_factory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Const.INVOKESPECIAL));
il.append(InstructionConst.NOP);
final InstructionHandle ih_8 = il.append(InstructionFactory.createReturn(Type.OBJECT));
Assert.assertNotNull(ih_8); // TODO why is this not used
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 4
| Source File: TestReturn01Creator.java From commons-bcel with Apache License 2.0 | 5 votes |
|
private void createMethod_0() {
final InstructionList il = new InstructionList();
final MethodGen method = new MethodGen(Const.ACC_PUBLIC, Type.VOID, Type.NO_ARGS, new String[] { },
"<init>", TEST_PACKAGE+".TestReturn01", il, _cp);
final InstructionHandle ih_0 = il.append(InstructionFactory.createLoad(Type.OBJECT, 0));
Assert.assertNotNull(ih_0); // TODO why is this not used
il.append(_factory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Const.INVOKESPECIAL));
final InstructionHandle ih_4 = il.append(InstructionFactory.createReturn(Type.VOID));
Assert.assertNotNull(ih_4); // TODO why is this not used
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 5
| Source File: TestArrayAccess03Creator.java From commons-bcel with Apache License 2.0 | 5 votes |
|
private void createMethod_0() {
final InstructionList il = new InstructionList();
final MethodGen method = new MethodGen(Const.ACC_PUBLIC, Type.VOID, Type.NO_ARGS, new String[] { }, "<init>",
TEST_PACKAGE+".TestArrayAccess03", il, _cp);
final InstructionHandle ih_0 = il.append(InstructionFactory.createLoad(Type.OBJECT, 0));
Assert.assertNotNull(ih_0); // TODO why is this not used
il.append(_factory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Const.INVOKESPECIAL));
final InstructionHandle ih_4 = il.append(InstructionFactory.createReturn(Type.VOID));
Assert.assertNotNull(ih_4); // TODO why is this not used
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 6
| Source File: TestArrayAccess02Creator.java From commons-bcel with Apache License 2.0 | 5 votes |
|
private void createMethod_1() {
final InstructionList il = new InstructionList();
final MethodGen method = new MethodGen(Const.ACC_PUBLIC | Const.ACC_STATIC, Type.VOID, Type.NO_ARGS, new String[] { },
"test", TEST_PACKAGE+".TestArrayAccess02", il, _cp);
final InstructionHandle ih_0 = il.append(new PUSH(_cp, 1));
Assert.assertNotNull(ih_0); // TODO why is this not used
il.append(_factory.createNewArray(new ObjectType(TEST_PACKAGE+".TestArrayAccess02"), (short) 1));
il.append(InstructionFactory.createStore(Type.OBJECT, 0));
final InstructionHandle ih_5 = il.append(new PUSH(_cp, 1));
Assert.assertNotNull(ih_5); // TODO why is this not used
il.append(_factory.createNewArray(Type.STRING, (short) 1));
il.append(InstructionFactory.createStore(Type.OBJECT, 1));
final InstructionHandle ih_10 = il.append(InstructionFactory.createLoad(Type.OBJECT, 1));
Assert.assertNotNull(ih_10); // TODO why is this not used
il.append(new PUSH(_cp, 0));
il.append(_factory.createNew(TEST_PACKAGE+".TestArrayAccess02"));
il.append(InstructionConst.DUP);
il.append(_factory.createInvoke(TEST_PACKAGE+".TestArrayAccess02", "<init>", Type.VOID, Type.NO_ARGS, Const.INVOKESPECIAL));
il.append(InstructionConst.AASTORE);
final InstructionHandle ih_20 = il.append(InstructionFactory.createReturn(Type.VOID));
Assert.assertNotNull(ih_20); // TODO why is this not used
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 7
| Source File: TestArrayAccess02Creator.java From commons-bcel with Apache License 2.0 | 5 votes |
|
private void createMethod_0() {
final InstructionList il = new InstructionList();
final MethodGen method = new MethodGen(Const.ACC_PUBLIC, Type.VOID, Type.NO_ARGS, new String[] { }, "<init>",
TEST_PACKAGE+".TestArrayAccess02", il, _cp);
final InstructionHandle ih_0 = il.append(InstructionFactory.createLoad(Type.OBJECT, 0));
Assert.assertNotNull(ih_0); // TODO why is this not used
il.append(_factory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Const.INVOKESPECIAL));
final InstructionHandle ih_4 = il.append(InstructionFactory.createReturn(Type.VOID));
Assert.assertNotNull(ih_4); // TODO why is this not used
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 8
| Source File: TestReturn03Creator.java From commons-bcel with Apache License 2.0 | 5 votes |
|
private void createMethod_1() {
final InstructionList il = new InstructionList();
final MethodGen method = new MethodGen(Const.ACC_PUBLIC | Const.ACC_STATIC, Type.INT, Type.NO_ARGS,
new String[] { }, "test3", TEST_PACKAGE+".TestReturn03", il, _cp);
final InstructionHandle ih_0 = il.append(InstructionConst.ACONST_NULL);
Assert.assertNotNull(ih_0); // TODO why is this not used
il.append(InstructionFactory.createReturn(Type.OBJECT));
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 9
| Source File: TestReturn03Creator.java From commons-bcel with Apache License 2.0 | 5 votes |
|
private void createMethod_0() {
final InstructionList il = new InstructionList();
final MethodGen method = new MethodGen(Const.ACC_PUBLIC, Type.VOID, Type.NO_ARGS, new String[] { },
"<init>", TEST_PACKAGE+".TestReturn03", il, _cp);
final InstructionHandle ih_0 = il.append(InstructionFactory.createLoad(Type.OBJECT, 0));
Assert.assertNotNull(ih_0); // TODO why is this not used
il.append(_factory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Const.INVOKESPECIAL));
final InstructionHandle ih_4 = il.append(InstructionFactory.createReturn(Type.VOID));
Assert.assertNotNull(ih_4); // TODO why is this not used
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 10
| Source File: TestArrayAccess04Creator.java From commons-bcel with Apache License 2.0 | 5 votes |
|
private void createMethod_0() {
final InstructionList il = new InstructionList();
final MethodGen method = new MethodGen(Const.ACC_PUBLIC, Type.VOID, Type.NO_ARGS, new String[] { }, "<init>",
TEST_PACKAGE+".TestArrayAccess04", il, _cp);
final InstructionHandle ih_0 = il.append(InstructionFactory.createLoad(Type.OBJECT, 0));
Assert.assertNotNull(ih_0); // TODO why is this not used
il.append(_factory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Const.INVOKESPECIAL));
final InstructionHandle ih_4 = il.append(InstructionFactory.createReturn(Type.VOID));
Assert.assertNotNull(ih_4); // TODO why is this not used
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 11
| Source File: LDAPSSLSocketFactoryGenerator.java From qpid-broker-j with Apache License 2.0 | 5 votes |
|
/**
* Create a static method 'getDefault' returning {@link SocketFactory}
* that creates a new instance of the sub-class and calls its no-argument
* constructor, the newly created is returned to the caller.
*
* @param classGen
* @param constantPoolGen
* @param instructionFactory
*/
private static void createGetDefaultStaticMethod(ClassGen classGen,
ConstantPoolGen constantPoolGen, InstructionFactory instructionFactory)
{
InstructionList il = new InstructionList();
String methodName = "getDefault";
MethodGen mg = new MethodGen(ACC_STATIC | ACC_PUBLIC, // access flags
Type.getType(SSLSocketFactory.class), // return type
new Type[0], // argument types - no args
new String[0], // arg names - no args
methodName,
classGen.getClassName(), // method, class
il,
constantPoolGen);
il.append(instructionFactory.createNew(classGen.getClassName()));
il.append(InstructionConst.DUP);
il.append(instructionFactory.createInvoke(classGen.getClassName(), "<init>", Type.VOID,
new Type[] {},
INVOKESPECIAL));
il.append(InstructionConst.ARETURN);
mg.setMaxStack();
classGen.addMethod(mg.getMethod());
il.dispose();
}
Example 12
| Source File: LocalVariableTypeTableTestCase.java From commons-bcel with Apache License 2.0 | 5 votes |
|
public Method injection(final JavaClass clazz, Method method, final ConstantPoolGen cp, final int firstStringOffset) {
final MethodGen methodGen = new MethodGen(method, clazz.getClassName(), cp);
final InstructionList instructionList = methodGen.getInstructionList();
instructionList.insert(instructionList.getStart(), makeWillBeAddedInstructionList(methodGen, firstStringOffset));
methodGen.setMaxStack();
methodGen.setMaxLocals();
method = methodGen.getMethod();
instructionList.dispose();
return method;
}
Example 13
| Source File: HandleTestCase.java From commons-bcel with Apache License 2.0 | 5 votes |
|
/**
* Asserts that instruction handles can be added an instruction list, without
* corrupting the list.
*/
static void handles() {
for (int i = 0; i < MAXI; i++) {
final InstructionList list = new InstructionList();
try {
for (int j = 0; j < MAXJ; j++) {
list.append(new ILOAD(j));
}
final InstructionHandle[] instructionHandles = list.getInstructionHandles();
for (int j = 0; j < instructionHandles.length; j++) {
final InstructionHandle handle = instructionHandles[j];
checkLinkage(handle, j);
if (j != ((ILOAD) handle.getInstruction()).getIndex()) {
final AssertionFailedError error = new AssertionFailedError("unexpected instruction at index " + j);
exception = error;
throw error;
}
}
if (exception != null) {
return;
}
} catch (final NullPointerException e) {
System.out.println("NPE at i=" + i);
exception = e;
throw e;
}
list.dispose(); // this initializes caching of unused instruction handles
}
}
Example 14
| Source File: HandleTestCase.java From commons-bcel with Apache License 2.0 | 5 votes |
|
/**
* Asserts that branch handles can be added an instruction list, without
* corrupting the list.
*/
static void branchHandles() {
for (int i = 0; i < MAXI; i++) {
final InstructionList list = new InstructionList();
final InstructionHandle start = list.append(new NOP());
try {
for (int j = 0; j < MAXJ; j++) {
list.append(new GOTO(start));
}
final InstructionHandle[] instructionHandles = list.getInstructionHandles();
for (int j = 0; j < instructionHandles.length; j++) {
final InstructionHandle handle = instructionHandles[j];
if (j > 0) {
checkLinkage(handle, j);
if (start != ((GOTO) handle.getInstruction()).getTarget()) {
final AssertionFailedError error = new AssertionFailedError(
"unexpected instruction at index " + j);
exception = error;
throw error;
}
}
}
if (exception != null) {
return;
}
} catch (final NullPointerException e) {
System.out.println("NPE at i=" + i);
exception = e;
throw e;
}
list.dispose(); // this initializes caching of unused instruction handles
}
}
Example 15
| Source File: ComplexObjectCreator.java From cougar with Apache License 2.0 | 5 votes |
|
private void createMethod_0() {
InstructionList il = new InstructionList();
MethodGen method = new MethodGen(ACC_PUBLIC, Type.VOID, Type.NO_ARGS, new String[] { }, "<init>", objectType, il, _cp);
InstructionHandle ih_0 = il.append(_factory.createLoad(Type.OBJECT, 0));
il.append(_factory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Constants.INVOKESPECIAL));
InstructionHandle ih_4 = il.append(_factory.createReturn(Type.VOID));
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 16
| Source File: ComplexObjectCreator.java From cougar with Apache License 2.0 | 5 votes |
|
private void createMethod_0() {
InstructionList il = new InstructionList();
MethodGen method = new MethodGen(ACC_PUBLIC, Type.VOID, Type.NO_ARGS, new String[] { }, "<init>", objectType, il, _cp);
InstructionHandle ih_0 = il.append(_factory.createLoad(Type.OBJECT, 0));
il.append(_factory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Constants.INVOKESPECIAL));
InstructionHandle ih_4 = il.append(_factory.createReturn(Type.VOID));
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 17
| Source File: ComplexObjectCreator.java From cougar with Apache License 2.0 | 5 votes |
|
private void createMethod_0() {
InstructionList il = new InstructionList();
MethodGen method = new MethodGen(ACC_PUBLIC, Type.VOID, Type.NO_ARGS, new String[] { }, "<init>", objectType, il, _cp);
InstructionHandle ih_0 = il.append(_factory.createLoad(Type.OBJECT, 0));
il.append(_factory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Constants.INVOKESPECIAL));
InstructionHandle ih_4 = il.append(_factory.createReturn(Type.VOID));
method.setMaxStack();
method.setMaxLocals();
_cg.addMethod(method.getMethod());
il.dispose();
}
Example 18
| Source File: Peephole.java From commons-bcel with Apache License 2.0 | 4 votes |
|
private static Method removeNOPs(final MethodGen mg) {
final InstructionList il = mg.getInstructionList();
final InstructionFinder f = new InstructionFinder(il);
final String pat = "NOP+"; // Find at least one NOP
InstructionHandle next = null;
int count = 0;
for (final Iterator<InstructionHandle[]> e = f.search(pat); e.hasNext(); ) {
final InstructionHandle[] match = e.next();
final InstructionHandle first = match[0];
final InstructionHandle last = match[match.length - 1];
// Some nasty Java compilers may add NOP at end of method.
if ((next = last.getNext()) == null) {
break;
}
count += match.length;
// Delete NOPs and redirect any references to them to the following (non-nop) instruction.
try {
il.delete(first, last);
} catch (final TargetLostException e2) {
for (final InstructionHandle target : e2.getTargets()) {
for (final InstructionTargeter targeter : target.getTargeters()) {
targeter.updateTarget(target, next);
}
}
}
}
Method m = null;
if (count > 0) {
System.out.println("Removed " + count + " NOP instructions from method " + mg.getName());
m = mg.getMethod();
}
il.dispose(); // Reuse instruction handles
return m;
}
Example 19
| Source File: helloify.java From commons-bcel with Apache License 2.0 | 4 votes |
|
/**
* Patch a method.
*/
private static Method helloifyMethod(Method m) {
final Code code = m.getCode();
final int flags = m.getAccessFlags();
final String name = m.getName();
// Sanity check
if (m.isNative() || m.isAbstract() || (code == null)) {
return m;
}
// Create instruction list to be inserted at method start.
final String mesg = "Hello from " + Utility.methodSignatureToString(m.getSignature(),
name,
Utility.accessToString(flags));
final InstructionList patch = new InstructionList();
patch.append(new GETSTATIC(out));
patch.append(new PUSH(cp, mesg));
patch.append(new INVOKEVIRTUAL(println));
final MethodGen mg = new MethodGen(m, class_name, cp);
final InstructionList il = mg.getInstructionList();
final InstructionHandle[] ihs = il.getInstructionHandles();
if (name.equals("<init>")) { // First let the super or other constructor be called
for (int j = 1; j < ihs.length; j++) {
if (ihs[j].getInstruction() instanceof INVOKESPECIAL) {
il.append(ihs[j], patch); // Should check: method name == "<init>"
break;
}
}
} else {
il.insert(ihs[0], patch);
}
// Stack size must be at least 2, since the println method takes 2 argument.
if (code.getMaxStack() < 2) {
mg.setMaxStack(2);
}
m = mg.getMethod();
il.dispose(); // Reuse instruction handles
return m;
}
