Examples with ClassFile com.sun.tools.classfile.ClassFile used on opensource projects

Example 16 with ClassFile

use of com.sun.tools.classfile.ClassFile in project ceylon-compiler by ceylon.

the class T7042566 method verifyBytecode.

void verifyBytecode(VarargsMethod selected, JavaSource source) {
    bytecodeCheckCount++;
    File compiledTest = new File("Test.class");
    try {
        ClassFile cf = ClassFile.read(compiledTest);
        Method testMethod = null;
        for (Method m : cf.methods) {
            if (m.getName(cf.constant_pool).equals("test")) {
                testMethod = m;
                break;
            }
        }
        if (testMethod == null) {
            throw new Error("Test method not found");
        }
        Code_attribute ea = (Code_attribute) testMethod.attributes.get(Attribute.Code);
        if (testMethod == null) {
            throw new Error("Code attribute for test() method not found");
        }
        for (Instruction i : ea.getInstructions()) {
            if (i.getMnemonic().equals("invokevirtual")) {
                int cp_entry = i.getUnsignedShort(1);
                CONSTANT_Methodref_info methRef = (CONSTANT_Methodref_info) cf.constant_pool.get(cp_entry);
                String type = methRef.getNameAndTypeInfo().getType();
                String sig = selected.parameterTypes.bytecodeSigStr;
                if (!type.contains(sig)) {
                    throw new Error("Unexpected type method call: " + type + "" + "\nfound: " + sig + "\n" + source.getCharContent(true));
                }
                break;
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
        throw new Error("error reading " + compiledTest + ": " + e);
    }
}