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DalvInsnList.javaAPI DocAndroid 5.1 API8283Thu Mar 12 22:18:30 GMT 2015com.android.dx.dex.code

DalvInsnList

public final class DalvInsnList extends com.android.dx.util.FixedSizeList
List of {@link DalvInsn} instances.

Fields Summary
private final int
regCount
The amount of register space, in register units, required for this code block. This may be greater than the largest observed register+ category because the method this code block exists in may specify arguments that are unused by the method.
Constructors Summary
public DalvInsnList(int size, int regCount)
Constructs an instance. All indices initially contain {@code null}.

param
size the size of the list

        super(size);
        this.regCount = regCount;
Methods Summary
public intcodeSize()
Gets the size of this instance, in 16-bit code units. This will only return a meaningful result if the instructions in this instance all have valid addresses.

return
{@code >= 0;} the size

        int sz = size();

        if (sz == 0) {
            return 0;
        }

        DalvInsn last = get(sz - 1);
        return last.getNextAddress();
public voiddebugPrint(java.io.OutputStream out, java.lang.String prefix, boolean verbose)
Does a human-friendly dump of this instance.

param
out {@code non-null;} where to dump
param
prefix {@code non-null;} prefix to attach to each line of output
param
verbose whether to be verbose; verbose output includes lines for zero-size instructions

        Writer w = new OutputStreamWriter(out);
        debugPrint(w, prefix, verbose);

        try {
            w.flush();
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
public voiddebugPrint(java.io.Writer out, java.lang.String prefix, boolean verbose)
Does a human-friendly dump of this instance.

param
out {@code non-null;} where to dump
param
prefix {@code non-null;} prefix to attach to each line of output
param
verbose whether to be verbose; verbose output includes lines for zero-size instructions and explicit constant pool indices

        IndentingWriter iw = new IndentingWriter(out, 0, prefix);
        int sz = size();

        try {
            for (int i = 0; i < sz; i++) {
                DalvInsn insn = (DalvInsn) get0(i);
                String s;

                if ((insn.codeSize() != 0) || verbose) {
                    s = insn.listingString("", 0, verbose);
                } else {
                    s = null;
                }

                if (s != null) {
                    iw.write(s);
                }
            }

            iw.flush();
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
public DalvInsnget(int n)
Gets the element at the given index. It is an error to call this with the index for an element which was never set; if you do that, this will throw {@code NullPointerException}.

param
n {@code >= 0, < size();} which index
return
{@code non-null;} element at that index

        return (DalvInsn) get0(n);
public intgetOutsSize()
Gets the size of the outgoing arguments area required by this method. This is equal to the largest argument word count of any method referred to by this instance.

return
{@code >= 0;} the required outgoing arguments size

        int sz = size();
        int result = 0;

        for (int i = 0; i < sz; i++) {
            DalvInsn insn = (DalvInsn) get0(i);

            if (!(insn instanceof CstInsn)) {
                continue;
            }

            Constant cst = ((CstInsn) insn).getConstant();

            if (!(cst instanceof CstBaseMethodRef)) {
                continue;
            }

            boolean isStatic =
                (insn.getOpcode().getFamily() == Opcodes.INVOKE_STATIC);
            int count =
                ((CstBaseMethodRef) cst).getParameterWordCount(isStatic);

            if (count > result) {
                result = count;
            }
        }

        return result;
public intgetRegistersSize()
Gets the minimum required register count implied by this instance. This includes any unused parameters that could potentially be at the top of the register space.

return
{@code >= 0;} the required registers size

        return regCount;
public static com.android.dx.dex.code.DalvInsnListmakeImmutable(java.util.ArrayList list, int regCount)
Constructs and returns an immutable instance whose elements are identical to the ones in the given list, in the same order.

param
list {@code non-null;} the list to use for elements
param
regCount count, in register-units, of the number of registers this code block requires.
return
{@code non-null;} an appropriately-constructed instance of this class

        int size = list.size();
        DalvInsnList result = new DalvInsnList(size, regCount);

        for (int i = 0; i < size; i++) {
            result.set(i, list.get(i));
        }

        result.setImmutable();
        return result;
public voidset(int n, DalvInsn insn)
Sets the instruction at the given index.

param
n {@code >= 0, < size();} which index
param
insn {@code non-null;} the instruction to set at {@code n}

        set0(n, insn);
public voidwriteTo(com.android.dx.util.AnnotatedOutput out)
Writes all the instructions in this instance to the given output destination.

param
out {@code non-null;} where to write to

        int startCursor = out.getCursor();
        int sz = size();

        if (out.annotates()) {
            boolean verbose = out.isVerbose();

            for (int i = 0; i < sz; i++) {
                DalvInsn insn = (DalvInsn) get0(i);
                int codeBytes = insn.codeSize() * 2;
                String s;

                if ((codeBytes != 0) || verbose) {
                    s = insn.listingString("  ", out.getAnnotationWidth(),
                            true);
                } else {
                    s = null;
                }

                if (s != null) {
                    out.annotate(codeBytes, s);
                } else if (codeBytes != 0) {
                    out.annotate(codeBytes, "");
                }
            }
        }

        for (int i = 0; i < sz; i++) {
            DalvInsn insn = (DalvInsn) get0(i);
            try {
                insn.writeTo(out);
            } catch (RuntimeException ex) {
                throw ExceptionWithContext.withContext(ex,
                        "...while writing " + insn);
            }
        }

        // Sanity check of the amount written.
        int written = (out.getCursor() - startCursor) / 2;
        if (written != codeSize()) {
            throw new RuntimeException("write length mismatch; expected " +
                    codeSize() + " but actually wrote " + written);
        }