Examples with CstString com.android.dx.rop.cst.CstString used on opensource projects

Example 6 with CstString

use of com.android.dx.rop.cst.CstString in project buck by facebook.

the class EscapeAnalysis method insertExceptionThrow.

/**
     * Replaces instructions that trigger an ArrayIndexOutofBounds exception
     * with an actual throw of the exception.
     *
     * @param insn {@code non-null;} instruction causing the exception
     * @param index {@code non-null;} index value that is out of bounds
     * @param deletedInsns {@code non-null;} set of instructions marked for
     * deletion
     */
private void insertExceptionThrow(SsaInsn insn, RegisterSpec index, HashSet<SsaInsn> deletedInsns) {
    // Create a new ArrayIndexOutOfBoundsException
    CstType exception = new CstType(Exceptions.TYPE_ArrayIndexOutOfBoundsException);
    insertThrowingInsnBefore(insn, RegisterSpecList.EMPTY, null, RegOps.NEW_INSTANCE, exception);
    // Add a successor block with a move result pseudo for the exception
    SsaBasicBlock currBlock = insn.getBlock();
    SsaBasicBlock newBlock = currBlock.insertNewSuccessor(currBlock.getPrimarySuccessor());
    SsaInsn newInsn = newBlock.getInsns().get(0);
    RegisterSpec newReg = RegisterSpec.make(ssaMeth.makeNewSsaReg(), exception);
    insertPlainInsnBefore(newInsn, RegisterSpecList.EMPTY, newReg, RegOps.MOVE_RESULT_PSEUDO, null);
    // Add another successor block to initialize the exception
    SsaBasicBlock newBlock2 = newBlock.insertNewSuccessor(newBlock.getPrimarySuccessor());
    SsaInsn newInsn2 = newBlock2.getInsns().get(0);
    CstNat newNat = new CstNat(new CstString("<init>"), new CstString("(I)V"));
    CstMethodRef newRef = new CstMethodRef(exception, newNat);
    insertThrowingInsnBefore(newInsn2, RegisterSpecList.make(newReg, index), null, RegOps.INVOKE_DIRECT, newRef);
    deletedInsns.add(newInsn2);
    // Add another successor block to throw the new exception
    SsaBasicBlock newBlock3 = newBlock2.insertNewSuccessor(newBlock2.getPrimarySuccessor());
    SsaInsn newInsn3 = newBlock3.getInsns().get(0);
    insertThrowingInsnBefore(newInsn3, RegisterSpecList.make(newReg), null, RegOps.THROW, null);
    newBlock3.replaceSuccessor(newBlock3.getPrimarySuccessorIndex(), ssaMeth.getExitBlock().getIndex());
    deletedInsns.add(newInsn3);
}

Example 7 with CstString

use of com.android.dx.rop.cst.CstString in project buck by facebook.

the class DebugInfoEncoder method entryAnnotationString.

/**
     * Returns a string representation of this LocalList entry that is
     * appropriate for emitting as an annotation.
     *
     * @param e {@code non-null;} entry
     * @return {@code non-null;} annotation string
     */
private String entryAnnotationString(LocalList.Entry e) {
    StringBuilder sb = new StringBuilder();
    sb.append(RegisterSpec.PREFIX);
    sb.append(e.getRegister());
    sb.append(' ');
    CstString name = e.getName();
    if (name == null) {
        sb.append("null");
    } else {
        sb.append(name.toHuman());
    }
    sb.append(' ');
    CstType type = e.getType();
    if (type == null) {
        sb.append("null");
    } else {
        sb.append(type.toHuman());
    }
    CstString signature = e.getSignature();
    if (signature != null) {
        sb.append(' ');
        sb.append(signature.toHuman());
    }
    return sb.toString();
}

Example 8 with CstString

use of com.android.dx.rop.cst.CstString in project buck by facebook.

the class ConstCollector method getConstsSortedByCountUse.

/**
     * Gets all of the collectable constant values used in this method,
     * sorted by most used first. Skips non-collectable consts, such as
     * non-string object constants
     *
     * @return {@code non-null;} list of constants in most-to-least used order
     */
private ArrayList<TypedConstant> getConstsSortedByCountUse() {
    int regSz = ssaMeth.getRegCount();
    final HashMap<TypedConstant, Integer> countUses = new HashMap<TypedConstant, Integer>();
    /*
         * Each collected constant can be used by just one local
         * (used only if COLLECT_ONE_LOCAL is true).
         */
    final HashSet<TypedConstant> usedByLocal = new HashSet<TypedConstant>();
    // Count how many times each const value is used.
    for (int i = 0; i < regSz; i++) {
        SsaInsn insn = ssaMeth.getDefinitionForRegister(i);
        if (insn == null || insn.getOpcode() == null)
            continue;
        RegisterSpec result = insn.getResult();
        TypeBearer typeBearer = result.getTypeBearer();
        if (!typeBearer.isConstant())
            continue;
        TypedConstant cst = (TypedConstant) typeBearer;
        // Find defining instruction for move-result-pseudo instructions
        if (insn.getOpcode().getOpcode() == RegOps.MOVE_RESULT_PSEUDO) {
            int pred = insn.getBlock().getPredecessors().nextSetBit(0);
            ArrayList<SsaInsn> predInsns;
            predInsns = ssaMeth.getBlocks().get(pred).getInsns();
            insn = predInsns.get(predInsns.size() - 1);
        }
        if (insn.canThrow()) {
            /*
                 * Don't move anything other than strings -- the risk
                 * of changing where an exception is thrown is too high.
                 */
            if (!(cst instanceof CstString) || !COLLECT_STRINGS) {
                continue;
            }
            /*
                 * We can't move any throwable const whose throw will be
                 * caught, so don't count them.
                 */
            if (insn.getBlock().getSuccessors().cardinality() > 1) {
                continue;
            }
        }
        /*
             * TODO: Might be nice to try and figure out which local
             * wins most when collected.
             */
        if (ssaMeth.isRegALocal(result)) {
            if (!COLLECT_ONE_LOCAL) {
                continue;
            } else {
                if (usedByLocal.contains(cst)) {
                    // Count one local usage only.
                    continue;
                } else {
                    usedByLocal.add(cst);
                }
            }
        }
        Integer has = countUses.get(cst);
        if (has == null) {
            countUses.put(cst, 1);
        } else {
            countUses.put(cst, has + 1);
        }
    }
    // Collect constants that have been reused.
    ArrayList<TypedConstant> constantList = new ArrayList<TypedConstant>();
    for (Map.Entry<TypedConstant, Integer> entry : countUses.entrySet()) {
        if (entry.getValue() > 1) {
            constantList.add(entry.getKey());
        }
    }
    // Sort by use, with most used at the beginning of the list.
    Collections.sort(constantList, new Comparator<Constant>() {

        public int compare(Constant a, Constant b) {
            int ret;
            ret = countUses.get(b) - countUses.get(a);
            if (ret == 0) {
                /*
                     * Provide sorting determinisim for constants with same
                     * usage count.
                     */
                ret = a.compareTo(b);
            }
            return ret;
        }

        @Override
        public boolean equals(Object obj) {
            return obj == this;
        }
    });
    return constantList;
}

Example 9 with CstString

use of com.android.dx.rop.cst.CstString in project buck by facebook.

the class HeaderItem method writeTo.

/** {@inheritDoc} */
@Override
public void writeTo(DexFile file, AnnotatedOutput out) {
    int mapOff = file.getMap().getFileOffset();
    Section firstDataSection = file.getFirstDataSection();
    Section lastDataSection = file.getLastDataSection();
    int dataOff = firstDataSection.getFileOffset();
    int dataSize = lastDataSection.getFileOffset() + lastDataSection.writeSize() - dataOff;
    String magic = file.getDexOptions().getMagic();
    if (out.annotates()) {
        out.annotate(8, "magic: " + new CstString(magic).toQuoted());
        out.annotate(4, "checksum");
        out.annotate(20, "signature");
        out.annotate(4, "file_size:       " + Hex.u4(file.getFileSize()));
        out.annotate(4, "header_size:     " + Hex.u4(SizeOf.HEADER_ITEM));
        out.annotate(4, "endian_tag:      " + Hex.u4(DexFormat.ENDIAN_TAG));
        out.annotate(4, "link_size:       0");
        out.annotate(4, "link_off:        0");
        out.annotate(4, "map_off:         " + Hex.u4(mapOff));
    }
    // Write the magic number.
    for (int i = 0; i < 8; i++) {
        out.writeByte(magic.charAt(i));
    }
    // Leave space for the checksum and signature.
    out.writeZeroes(24);
    out.writeInt(file.getFileSize());
    out.writeInt(SizeOf.HEADER_ITEM);
    out.writeInt(DexFormat.ENDIAN_TAG);
    /*
         * Write zeroes for the link size and data, as the output
         * isn't a staticly linked file.
         */
    out.writeZeroes(8);
    out.writeInt(mapOff);
    // Write out each section's respective header part.
    file.getStringIds().writeHeaderPart(out);
    file.getTypeIds().writeHeaderPart(out);
    file.getProtoIds().writeHeaderPart(out);
    file.getFieldIds().writeHeaderPart(out);
    file.getMethodIds().writeHeaderPart(out);
    file.getClassDefs().writeHeaderPart(out);
    if (out.annotates()) {
        out.annotate(4, "data_size:       " + Hex.u4(dataSize));
        out.annotate(4, "data_off:        " + Hex.u4(dataOff));
    }
    out.writeInt(dataSize);
    out.writeInt(dataOff);
}

Example 10 with CstString

use of com.android.dx.rop.cst.CstString in project buck by facebook.

the class ProtoIdItem method makeShortForm.

/**
     * Creates the short-form of the given prototype.
     *
     * @param prototype {@code non-null;} the prototype
     * @return {@code non-null;} the short form
     */
private static CstString makeShortForm(Prototype prototype) {
    StdTypeList parameters = prototype.getParameterTypes();
    int size = parameters.size();
    StringBuilder sb = new StringBuilder(size + 1);
    sb.append(shortFormCharFor(prototype.getReturnType()));
    for (int i = 0; i < size; i++) {
        sb.append(shortFormCharFor(parameters.getType(i)));
    }
    return new CstString(sb.toString());
}