Example usage for org.objectweb.asm MethodVisitor visitVarInsn

List of usage examples for org.objectweb.asm MethodVisitor visitVarInsn

  1. HOME
  2. Java
  3. org.objectweb.asm
  4. org.objectweb.asm.*
  5. MethodVisitor
  6. visitVarInsn

Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitVarInsn.

Prototype

public void visitVarInsn(final int opcode, final int var)

Source Link

Document

Visits a local variable instruction.

Usage

From source file:com.google.devtools.build.android.resources.RClassGenerator.java

License:Open Source License

private static void writeConstructor(ClassWriter classWriter) {
    MethodVisitor constructor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V",
            null, /* signature */
            null /* exceptions */);
    constructor.visitCode();/*  w  ww.j a va  2 s .  c  om*/
    constructor.visitVarInsn(Opcodes.ALOAD, 0);
    constructor.visitMethodInsn(Opcodes.INVOKESPECIAL, SUPER_CLASS, "<init>", "()V", false);
    constructor.visitInsn(Opcodes.RETURN);
    constructor.visitMaxs(1, 1);
    constructor.visitEnd();
}

From source file:com.google.devtools.build.android.resources.RClassWriter.java

License:Open Source License

private static void writeConstructor(ClassWriter classWriter) {
    MethodVisitor constructor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
    constructor.visitCode();/*from   w  ww . j a  v  a2 s .c o  m*/
    constructor.visitVarInsn(Opcodes.ALOAD, 0);
    constructor.visitMethodInsn(Opcodes.INVOKESPECIAL, SUPER_CLASS, "<init>", "()V", false);
    constructor.visitInsn(Opcodes.RETURN);
    constructor.visitMaxs(1, 1);
    constructor.visitEnd();
}

From source file:com.google.gag.agent.ThisHadBetterGenerator.java

License:Apache License

/**
 * The given Property needs to be either {@link Property#THE_BLUE_PILL} or
 * {@link Property#THE_RED_PILL}./*from   w ww  . jav a 2  s.co m*/
 */
private static void visitPill(MethodVisitor mv, boolean be, Property property, LocalVarInfo param, Label okay) {

    if (param.getType().getSort() != Type.OBJECT) {
        throw new AnnotationStateError("Unsupported type: " + param.getType());
    }

    // TODO: Also handle if parameter is null.

    Label notOkay = new Label();

    // See if the param type matches a Pill type
    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitMethodInsn(INVOKEVIRTUAL, param.getType().getInternalName(), "getClass", "()Ljava/lang/Class;");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getName", "()Ljava/lang/String;");
    mv.visitLdcInsn("Pill|ThePill|.*[\\.$]Pill|.*[\\.$]ThePill");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "matches", "(Ljava/lang/String;)Z");

    if (be) {
        // If the param type does not match a Pill type, that's not okay, go to exception.
        mv.visitJumpInsn(FALSE, notOkay);
    } else {
        // If the param type does not match a Pill type, then that's okay, skip exception.
        mv.visitJumpInsn(FALSE, okay);
    }

    // At this point, the param type matches a Pill type.
    // So check if the param type is an enum type.
    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitTypeInsn(INSTANCEOF, "java/lang/Enum");

    if (be) {
        // If the param type is not an enum, that's not okay, go to exception.
        mv.visitJumpInsn(FALSE, notOkay);
    } else {
        // If the param type is not an enum, that's okay, skip exception.
        mv.visitJumpInsn(FALSE, okay);
    }

    // Check that the Pill type has the property specified in the annotation.
    // First try to match on "BLUE" (or "RED").
    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitTypeInsn(CHECKCAST, "java/lang/Enum");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Enum", "name", "()Ljava/lang/String;");
    mv.visitLdcInsn(property == Property.THE_BLUE_PILL ? "BLUE" : "RED");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z");
    mv.visitJumpInsn(TRUE, be ? okay : notOkay);

    // Then try to see if the value ends with "BLUE_PILL" (or "RED_PILL").
    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitTypeInsn(CHECKCAST, "java/lang/Enum");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Enum", "name", "()Ljava/lang/String;");
    mv.visitLdcInsn(property == Property.THE_BLUE_PILL ? "BLUE_PILL" : "RED_PILL");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "endsWith", "(Ljava/lang/String;)Z");
    mv.visitJumpInsn(be ? TRUE : FALSE, okay);

    mv.visitLabel(notOkay);
}

From source file:com.google.gwt.dev.shell.rewrite.RewriteSingleJsoImplDispatches.java

License:Apache License

/**
 * For regular Java objects that implement a SingleJsoImpl interface, write
 * instance trampoline dispatchers for mangled method names to the
 * implementing method.// w w  w.j  av a  2  s .c  om
 */
private void writeTrampoline(String stubIntr) {
    /*
     * This is almost the same kind of trampoline as the ones generated in
     * WriteJsoImpl, however there are enough small differences between the
     * semantics of the dispatches that would make a common implementation far
     * more awkward than the duplication of code.
     */
    for (String mangledName : toImplement(stubIntr)) {
        for (Method method : jsoData.getDeclarations(mangledName)) {

            Method toCall = new Method(method.getName(), method.getDescriptor());

            // Must not be final
            MethodVisitor mv = super.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, mangledName,
                    method.getDescriptor(), null, null);
            if (mv != null) {
                mv.visitCode();

                /*
                 * It just so happens that the stack and local variable sizes are the
                 * same, but they're kept distinct to aid in clarity should the
                 * dispatch logic change.
                 *
                 * These start at 1 because we need to load "this" onto the stack
                 */
                int var = 1;
                int size = 1;

                // load this
                mv.visitVarInsn(Opcodes.ALOAD, 0);

                // then the rest of the arguments
                for (Type t : toCall.getArgumentTypes()) {
                    size += t.getSize();
                    mv.visitVarInsn(t.getOpcode(Opcodes.ILOAD), var);
                    var += t.getSize();
                }

                // Make sure there's enough room for the return value
                size = Math.max(size, toCall.getReturnType().getSize());

                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, currentTypeName, toCall.getName(),
                        toCall.getDescriptor(), false);
                mv.visitInsn(toCall.getReturnType().getOpcode(Opcodes.IRETURN));
                mv.visitMaxs(size, var);
                mv.visitEnd();
            }
        }
    }
}

From source file:com.google.gwtorm.jdbc.AccessGen.java

License:Apache License

private void implementConstructor() {
    final String consName = "<init>";
    final String consDesc = Type.getMethodDescriptor(Type.VOID_TYPE,
            new Type[] { Type.getType(JdbcSchema.class) });
    final MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC, consName, consDesc, null, null);
    mv.visitCode();//  w  ww .j a v a  2 s. c o  m
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKESPECIAL, superTypeName, consName, consDesc);
    mv.visitInsn(RETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

From source file:com.google.gwtorm.jdbc.AccessGen.java

License:Apache License

private void implementPrimaryKey() {
    final KeyModel pk = model.getPrimaryKey();
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_FINAL, "primaryKey",
            Type.getMethodDescriptor(Type.getType(Key.class), new Type[] { Type.getType(Object.class) }), null,
            null);/* ww w .ja v a  2  s  .c  o m*/
    mv.visitCode();
    if (pk != null && pk.getField().isNested()) {
        final ColumnModel pkf = pk.getField();
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, entityType.getInternalName());
        mv.visitFieldInsn(GETFIELD, entityType.getInternalName(), pkf.getFieldName(),
                CodeGenSupport.toType(pkf).getDescriptor());
    } else {
        mv.visitInsn(ACONST_NULL);
    }
    mv.visitInsn(ARETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

From source file:com.google.gwtorm.jdbc.AccessGen.java

License:Apache License

private void implementGetOne() {
    final KeyModel pk = model.getPrimaryKey();

    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_FINAL, "get",
            Type.getMethodDescriptor(Type.getType(Object.class), new Type[] { Type.getType(Key.class) }), null,
            new String[] { Type.getType(OrmException.class).getInternalName() });
    mv.visitCode();/*from   w ww.j  a va 2s . co m*/
    if (pk != null && pk.getField().isNested()) {
        final Type keyType = CodeGenSupport.toType(pk.getField());
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, keyType.getInternalName());
        mv.visitMethodInsn(INVOKEVIRTUAL, implTypeName, pk.getName(),
                Type.getMethodDescriptor(entityType, new Type[] { keyType }));
        mv.visitInsn(ARETURN);
    } else {
        throwUnsupported(mv, model.getMethodName() + " does not support get(Key)");
    }
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

From source file:com.google.gwtorm.jdbc.AccessGen.java

License:Apache License

private void implementBindOne(final DmlType type) {
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_FINAL, type.methodName,
            Type.getMethodDescriptor(Type.VOID_TYPE,
                    new Type[] { Type.getType(PreparedStatement.class), Type.getType(Object.class) }),
            null, new String[] { Type.getType(SQLException.class).getInternalName() });
    mv.visitCode();/*from w w  w .j av a2  s . co  m*/

    if (type != DmlType.INSERT && model.getPrimaryKey() == null) {
        throwUnsupported(mv, model.getMethodName() + " has no primary key");
        mv.visitInsn(RETURN);
        mv.visitMaxs(-1, -1);
        mv.visitEnd();
    }

    mv.visitVarInsn(ALOAD, 2);
    mv.visitTypeInsn(CHECKCAST, entityType.getInternalName());
    mv.visitVarInsn(ASTORE, 2);

    final CodeGenSupport cgs = new CodeGenSupport(mv);
    cgs.setEntityType(entityType);

    for (final ColumnModel col : model.getRowVersionColumns()) {
        cgs.setFieldReference(col);
        cgs.fieldSetBegin();
        cgs.pushFieldValue();
        mv.visitInsn(ICONST_1);
        mv.visitInsn(IADD);
        cgs.fieldSetEnd();
    }
    cgs.resetColumnIndex(0);

    if (type != DmlType.DELETE) {
        final List<ColumnModel> cols = new ArrayList<ColumnModel>();
        cols.addAll(model.getDependentFields());
        cols.addAll(model.getRowVersionFields());
        for (final ColumnModel field : cols) {
            doBindOne(mv, cgs, field);
        }
    }

    for (final ColumnModel col : model.getPrimaryKeyColumns()) {
        cgs.setFieldReference(col);
        dialect.getSqlTypeInfo(col).generatePreparedStatementSet(cgs);
    }
    if (type != DmlType.INSERT) {
        for (final ColumnModel col : model.getRowVersionColumns()) {
            cgs.setFieldReference(col);
            cgs.pushSqlHandle();
            cgs.pushColumnIndex();
            cgs.pushFieldValue();
            mv.visitInsn(ICONST_1);
            mv.visitInsn(ISUB);
            cgs.invokePreparedStatementSet("Int");
        }
    }

    mv.visitInsn(RETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

From source file:com.google.gwtorm.jdbc.AccessGen.java

License:Apache License

private void implementBindOneFetch() {
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_FINAL, "bindOneFetch",
            Type.getMethodDescriptor(Type.VOID_TYPE,
                    new Type[] { Type.getType(ResultSet.class), Type.getType(Object.class) }),
            null, new String[] { Type.getType(SQLException.class).getInternalName() });
    mv.visitCode();//from   w w w . ja  v a 2  s  .  c o  m

    mv.visitVarInsn(ALOAD, 2);
    mv.visitTypeInsn(CHECKCAST, entityType.getInternalName());
    mv.visitVarInsn(ASTORE, 2);

    final CodeGenSupport cgs = new CodeGenSupport(mv);
    cgs.setEntityType(entityType);

    if (model.getPrimaryKey() != null && model.getPrimaryKey().getField().isNested()) {
        final ColumnModel pkf = model.getPrimaryKey().getField();
        final Type vType = CodeGenSupport.toType(pkf);
        final int oldIdx = cgs.getColumnIndex();
        cgs.setFieldReference(pkf);
        cgs.fieldSetBegin();
        mv.visitTypeInsn(NEW, vType.getInternalName());
        mv.visitInsn(DUP);
        mv.visitMethodInsn(INVOKESPECIAL, vType.getInternalName(), "<init>",
                Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}));
        cgs.fieldSetEnd();
        cgs.resetColumnIndex(oldIdx);
    }

    final List<ColumnModel> cols = new ArrayList<ColumnModel>();
    cols.addAll(model.getDependentFields());
    cols.addAll(model.getRowVersionFields());
    cols.addAll(model.getPrimaryKeyColumns());
    for (final ColumnModel field : cols) {
        doFetchOne(mv, cgs, field, -1);
    }

    mv.visitInsn(RETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

From source file:com.google.gwtorm.jdbc.AccessGen.java

License:Apache License

private void doFetchOne(final MethodVisitor mv, final CodeGenSupport cgs, final ColumnModel field,
        final int reportLiveInto) {
    if (field.isNested()) {
        int oldIdx = cgs.getColumnIndex();
        final Type vType = CodeGenSupport.toType(field);
        final int livecnt;

        if (field.isNotNull()) {
            livecnt = -1;//from w  ww.ja  v  a2 s .  co  m
        } else {
            livecnt = cgs.newLocal();
            cgs.push(0);
            mv.visitVarInsn(ISTORE, livecnt);
        }

        cgs.setFieldReference(field);
        cgs.fieldSetBegin();
        mv.visitTypeInsn(NEW, vType.getInternalName());
        mv.visitInsn(DUP);
        mv.visitMethodInsn(INVOKESPECIAL, vType.getInternalName(), "<init>",
                Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}));
        cgs.fieldSetEnd();

        cgs.resetColumnIndex(oldIdx);
        for (final ColumnModel c : field.getNestedColumns()) {
            doFetchOne(mv, cgs, c, livecnt);
        }

        if (livecnt >= 0) {
            oldIdx = cgs.getColumnIndex();

            final Label islive = new Label();
            mv.visitVarInsn(ILOAD, livecnt);
            mv.visitJumpInsn(IFNE, islive);
            cgs.setFieldReference(field);
            cgs.fieldSetBegin();
            mv.visitInsn(ACONST_NULL);
            cgs.fieldSetEnd();

            if (reportLiveInto >= 0) {
                final Label end = new Label();
                mv.visitJumpInsn(GOTO, end);
                mv.visitLabel(islive);
                mv.visitIincInsn(reportLiveInto, 1);
                mv.visitLabel(end);
            } else {
                mv.visitLabel(islive);
            }

            cgs.resetColumnIndex(oldIdx);
            cgs.freeLocal(livecnt);
        }

    } else {
        final int dupTo;
        if (reportLiveInto >= 0 && CodeGenSupport.toType(field).getSort() == Type.OBJECT) {
            dupTo = cgs.newLocal();
        } else {
            dupTo = -1;
        }

        cgs.setFieldReference(field);
        cgs.setDupOnFieldSetEnd(dupTo);
        dialect.getSqlTypeInfo(field).generateResultSetGet(cgs);

        if (reportLiveInto >= 0) {
            final Label wasnull = new Label();
            if (dupTo >= 0) {
                mv.visitVarInsn(ALOAD, dupTo);
                mv.visitJumpInsn(IFNULL, wasnull);
                cgs.freeLocal(dupTo);
            } else {
                cgs.pushSqlHandle();
                mv.visitMethodInsn(INVOKEINTERFACE, Type.getType(ResultSet.class).getInternalName(), "wasNull",
                        Type.getMethodDescriptor(Type.BOOLEAN_TYPE, new Type[] {}));
                mv.visitJumpInsn(IFNE, wasnull);
            }
            mv.visitIincInsn(reportLiveInto, 1);
            mv.visitLabel(wasnull);
        }
    }
}