@Override
public Object visitPrintStatement(PrintStatement printStatement, Object arg) throws Exception {
MethodVisitor mv = ((InheritedAttributes) arg).mv;
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitLineNumber(printStatement.firstToken.getLineNumber(), l0);
mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
printStatement.expression.visit(this, arg); // adds code to leave value
// of expression on top of
// stack.
// Unless there is a good
// reason to do otherwise,
// pass arg down the tree
String etype = printStatement.expression.getType();
if (etype.equals("I") || etype.equals("Z") || etype.equals("Ljava/lang/String;")) {
String desc = "(" + etype + ")V";
mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", desc, false);
} else {
// mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Integer", "toString",
// "()Ljava/lang/String;",false);
mv.visitMethodInsn(
INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/Object;)V", false);
}
return null;
}
@Override
public void visitLineNumber(int lineNumber, Label start) {
super.visitLineNumber(lineNumber, start);
// TODO 1: Register that this line exists
// TODO 2: Add byte code here which produces a method call to Registry.callLine()
}
@Override
public void visitLineNumber(final int line, final Label start) {
checkStartCode();
checkEndCode();
checkUnsignedShort(line, "Invalid line number");
checkLabel(start, true, "start label");
super.visitLineNumber(line, start);
}
public static byte[] dump() throws Exception {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
cw.visit(52, ACC_PUBLIC + ACC_SUPER, "DummyBundleClass", null, "java/lang/Object", null);
cw.visitSource("DummyBundleClass.java", null);
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitLineNumber(1, l0);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
mv.visitInsn(RETURN);
Label l1 = new Label();
mv.visitLabel(l1);
mv.visitLocalVariable("this", "LDummyBundleClass;", null, l0, l1, 0);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
mv.visitCode();
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitLineNumber(4, l0);
mv.visitInsn(RETURN);
Label l1 = new Label();
mv.visitLabel(l1);
mv.visitLocalVariable("args", "[Ljava/lang/String;", null, l0, l1, 0);
mv.visitMaxs(0, 1);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
@Override
public void visitLineNumber(int line, Label start) {
_currentLine = line;
_currentJump = 0;
mv.visitLdcInsn(_owner);
mv.visitIntInsn(Opcodes.SIPUSH, line);
mv.visitMethodInsn(
Opcodes.INVOKESTATIC, _TOUCH_UTIL_CLASS, "touch", "(Ljava/lang/String;I)V", false);
super.visitLineNumber(line, start);
}
@Test
public void testLineNumberNegative() {
Label l1 = new Label();
sanitizer.visitCode();
sanitizer.visitLineNumber(15, l1);
sanitizer.visitInsn(Opcodes.RETURN);
sanitizer.visitMaxs(0, 0);
sanitizer.visitEnd();
expected.visitInsn(Opcodes.RETURN);
expected.visitMaxs(0, 0);
expected.visitEnd();
assertOutput();
}
/** {@inheritDoc} */
@Override
public void visitLineNumber(int line, Label start) {
super.visitLineNumber(line, start);
currentLine = line;
if (methodName.equals("<clinit>")) return;
if (!hadInvokeSpecial) return;
mv.visitMethodInsn(
Opcodes.INVOKESTATIC,
PackageInfo.getNameWithSlash(ExecutionTracer.class),
"checkTimeout",
"()V",
false);
}
public void visitLineNumber(int i, Label label) {
System.out.println("visitLineNumber(" + i + ", " + label + ")");
methodVisitor.visitLineNumber(i, label);
}
public void visitLineNumber(int line, Label start) {
visitor.visitLineNumber(line, start);
}
@Override
public void visitLineNumber(int line, Label start) {
mtd.addDebugInfo(line);
super.visitLineNumber(line, start);
}
@Override
public Object visitProgram(Program program, Object arg) throws Exception {
className = program.JVMName;
classDescriptor = 'L' + className + ';';
cw.visit(
52, // version
ACC_PUBLIC + ACC_SUPER, // access codes
className, // fully qualified classname
null, // signature
"java/lang/Object", // superclass
new String[] {"cop5555sp15/Codelet"} // implemented interfaces
);
cw.visitSource(null, null); // maybe replace first argument with source
// file name
// create init method
{
MethodVisitor mv;
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitLineNumber(3, l0);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
mv.visitInsn(RETURN);
Label l1 = new Label();
mv.visitLabel(l1);
mv.visitLocalVariable("this", classDescriptor, null, l0, l1, 0);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
// generate the execute method
MethodVisitor mv =
cw.visitMethod(
ACC_PUBLIC,
"execute", // name of top
// level
// method
"()V", // descriptor: this method is parameterless with no
// return value
null, // signature. This is null for us, it has to do with generic types
null // array of strings containing exceptions
);
mv.visitCode();
Label lbeg = new Label();
mv.visitLabel(lbeg);
mv.visitLineNumber(program.firstToken.lineNumber, lbeg);
program.block.visit(this, new InheritedAttributes(mv));
mv.visitInsn(RETURN);
Label lend = new Label();
mv.visitLabel(lend);
mv.visitLocalVariable("this", classDescriptor, null, lbeg, lend, 0);
mv.visitMaxs(0, 0); // this is required just before the end of a method.
// It causes asm to calculate information about the
// stack usage of this method.
mv.visitEnd();
cw.visitEnd();
return cw.toByteArray();
}
